Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * esp.c - driver for Hayes ESP serial cards |
| 3 | * |
| 4 | * --- Notices from serial.c, upon which this driver is based --- |
| 5 | * |
| 6 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 7 | * |
| 8 | * Extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92. Now |
| 9 | * much more extensible to support other serial cards based on the |
| 10 | * 16450/16550A UART's. Added support for the AST FourPort and the |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 11 | * Accent Async board. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * |
| 13 | * set_serial_info fixed to set the flags, custom divisor, and uart |
| 14 | * type fields. Fix suggested by Michael K. Johnson 12/12/92. |
| 15 | * |
| 16 | * 11/95: TIOCMIWAIT, TIOCGICOUNT by Angelo Haritsis <ah@doc.ic.ac.uk> |
| 17 | * |
| 18 | * 03/96: Modularised by Angelo Haritsis <ah@doc.ic.ac.uk> |
| 19 | * |
| 20 | * rs_set_termios fixed to look also for changes of the input |
| 21 | * flags INPCK, BRKINT, PARMRK, IGNPAR and IGNBRK. |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 22 | * Bernd Anhäupl 05/17/96. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | * |
| 24 | * --- End of notices from serial.c --- |
| 25 | * |
| 26 | * Support for the ESP serial card by Andrew J. Robinson |
| 27 | * <arobinso@nyx.net> (Card detection routine taken from a patch |
| 28 | * by Dennis J. Boylan). Patches to allow use with 2.1.x contributed |
| 29 | * by Chris Faylor. |
| 30 | * |
| 31 | * Most recent changes: (Andrew J. Robinson) |
| 32 | * Support for PIO mode. This allows the driver to work properly with |
| 33 | * multiport cards. |
| 34 | * |
| 35 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - |
| 36 | * several cleanups, use module_init/module_exit, etc |
| 37 | * |
| 38 | * This module exports the following rs232 io functions: |
| 39 | * |
| 40 | * int espserial_init(void); |
| 41 | */ |
| 42 | |
| 43 | #include <linux/module.h> |
| 44 | #include <linux/errno.h> |
| 45 | #include <linux/signal.h> |
| 46 | #include <linux/sched.h> |
| 47 | #include <linux/interrupt.h> |
| 48 | #include <linux/tty.h> |
| 49 | #include <linux/tty_flip.h> |
| 50 | #include <linux/serial.h> |
| 51 | #include <linux/serialP.h> |
| 52 | #include <linux/serial_reg.h> |
| 53 | #include <linux/major.h> |
| 54 | #include <linux/string.h> |
| 55 | #include <linux/fcntl.h> |
| 56 | #include <linux/ptrace.h> |
| 57 | #include <linux/ioport.h> |
| 58 | #include <linux/mm.h> |
| 59 | #include <linux/init.h> |
| 60 | #include <linux/delay.h> |
Jiri Slaby | 1977f03 | 2007-10-18 23:40:25 -0700 | [diff] [blame] | 61 | #include <linux/bitops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | #include <asm/system.h> |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 64 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | #include <asm/dma.h> |
| 67 | #include <linux/slab.h> |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 68 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | #include <linux/hayesesp.h> |
| 71 | |
| 72 | #define NR_PORTS 64 /* maximum number of ports */ |
| 73 | #define NR_PRIMARY 8 /* maximum number of primary ports */ |
| 74 | #define REGION_SIZE 8 /* size of io region to request */ |
| 75 | |
| 76 | /* The following variables can be set by giving module options */ |
| 77 | static int irq[NR_PRIMARY]; /* IRQ for each base port */ |
| 78 | static unsigned int divisor[NR_PRIMARY]; /* custom divisor for each port */ |
| 79 | static unsigned int dma = ESP_DMA_CHANNEL; /* DMA channel */ |
| 80 | static unsigned int rx_trigger = ESP_RX_TRIGGER; |
| 81 | static unsigned int tx_trigger = ESP_TX_TRIGGER; |
| 82 | static unsigned int flow_off = ESP_FLOW_OFF; |
| 83 | static unsigned int flow_on = ESP_FLOW_ON; |
| 84 | static unsigned int rx_timeout = ESP_RX_TMOUT; |
| 85 | static unsigned int pio_threshold = ESP_PIO_THRESHOLD; |
| 86 | |
| 87 | MODULE_LICENSE("GPL"); |
| 88 | |
| 89 | module_param_array(irq, int, NULL, 0); |
| 90 | module_param_array(divisor, uint, NULL, 0); |
| 91 | module_param(dma, uint, 0); |
| 92 | module_param(rx_trigger, uint, 0); |
| 93 | module_param(tx_trigger, uint, 0); |
| 94 | module_param(flow_off, uint, 0); |
| 95 | module_param(flow_on, uint, 0); |
| 96 | module_param(rx_timeout, uint, 0); |
| 97 | module_param(pio_threshold, uint, 0); |
| 98 | |
| 99 | /* END */ |
| 100 | |
| 101 | static char *dma_buffer; |
| 102 | static int dma_bytes; |
| 103 | static struct esp_pio_buffer *free_pio_buf; |
| 104 | |
| 105 | #define DMA_BUFFER_SZ 1024 |
| 106 | |
| 107 | #define WAKEUP_CHARS 1024 |
| 108 | |
| 109 | static char serial_name[] __initdata = "ESP serial driver"; |
| 110 | static char serial_version[] __initdata = "2.2"; |
| 111 | |
| 112 | static struct tty_driver *esp_driver; |
| 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | /* |
| 115 | * Serial driver configuration section. Here are the various options: |
| 116 | * |
| 117 | * SERIAL_PARANOIA_CHECK |
| 118 | * Check the magic number for the esp_structure where |
| 119 | * ever possible. |
| 120 | */ |
| 121 | |
| 122 | #undef SERIAL_PARANOIA_CHECK |
| 123 | #define SERIAL_DO_RESTART |
| 124 | |
| 125 | #undef SERIAL_DEBUG_INTR |
| 126 | #undef SERIAL_DEBUG_OPEN |
| 127 | #undef SERIAL_DEBUG_FLOW |
| 128 | |
| 129 | #if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT) |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 130 | #define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 131 | tty->name, info->port.flags, \ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 132 | serial_driver.refcount, \ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 133 | info->port.count, tty->count, s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | #else |
| 135 | #define DBG_CNT(s) |
| 136 | #endif |
| 137 | |
| 138 | static struct esp_struct *ports; |
| 139 | |
| 140 | static void change_speed(struct esp_struct *info); |
| 141 | static void rs_wait_until_sent(struct tty_struct *, int); |
| 142 | |
| 143 | /* |
| 144 | * The ESP card has a clock rate of 14.7456 MHz (that is, 2**ESPC_SCALE |
| 145 | * times the normal 1.8432 Mhz clock of most serial boards). |
| 146 | */ |
| 147 | #define BASE_BAUD ((1843200 / 16) * (1 << ESPC_SCALE)) |
| 148 | |
| 149 | /* Standard COM flags (except for COM4, because of the 8514 problem) */ |
| 150 | #define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST) |
| 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | static inline int serial_paranoia_check(struct esp_struct *info, |
| 153 | char *name, const char *routine) |
| 154 | { |
| 155 | #ifdef SERIAL_PARANOIA_CHECK |
| 156 | static const char badmagic[] = KERN_WARNING |
| 157 | "Warning: bad magic number for serial struct (%s) in %s\n"; |
| 158 | static const char badinfo[] = KERN_WARNING |
| 159 | "Warning: null esp_struct for (%s) in %s\n"; |
| 160 | |
| 161 | if (!info) { |
| 162 | printk(badinfo, name, routine); |
| 163 | return 1; |
| 164 | } |
| 165 | if (info->magic != ESP_MAGIC) { |
| 166 | printk(badmagic, name, routine); |
| 167 | return 1; |
| 168 | } |
| 169 | #endif |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static inline unsigned int serial_in(struct esp_struct *info, int offset) |
| 174 | { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 175 | return inb(info->io_port + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | static inline void serial_out(struct esp_struct *info, int offset, |
| 179 | unsigned char value) |
| 180 | { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 181 | outb(value, info->io_port+offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | /* |
| 185 | * ------------------------------------------------------------ |
| 186 | * rs_stop() and rs_start() |
| 187 | * |
| 188 | * This routines are called before setting or resetting tty->stopped. |
| 189 | * They enable or disable transmitter interrupts, as necessary. |
| 190 | * ------------------------------------------------------------ |
| 191 | */ |
| 192 | static void rs_stop(struct tty_struct *tty) |
| 193 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 194 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | unsigned long flags; |
| 196 | |
| 197 | if (serial_paranoia_check(info, tty->name, "rs_stop")) |
| 198 | return; |
| 199 | |
| 200 | spin_lock_irqsave(&info->lock, flags); |
| 201 | if (info->IER & UART_IER_THRI) { |
| 202 | info->IER &= ~UART_IER_THRI; |
| 203 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 204 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 205 | } |
| 206 | spin_unlock_irqrestore(&info->lock, flags); |
| 207 | } |
| 208 | |
| 209 | static void rs_start(struct tty_struct *tty) |
| 210 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 211 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | if (serial_paranoia_check(info, tty->name, "rs_start")) |
| 215 | return; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | spin_lock_irqsave(&info->lock, flags); |
| 218 | if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) { |
| 219 | info->IER |= UART_IER_THRI; |
| 220 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 221 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 222 | } |
| 223 | spin_unlock_irqrestore(&info->lock, flags); |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * ---------------------------------------------------------------------- |
| 228 | * |
| 229 | * Here starts the interrupt handling routines. All of the following |
| 230 | * subroutines are declared as inline and are folded into |
| 231 | * rs_interrupt(). They were separated out for readability's sake. |
| 232 | * |
| 233 | * Note: rs_interrupt() is a "fast" interrupt, which means that it |
| 234 | * runs with interrupts turned off. People who may want to modify |
| 235 | * rs_interrupt() should try to keep the interrupt handler as fast as |
| 236 | * possible. After you are done making modifications, it is not a bad |
| 237 | * idea to do: |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 238 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c |
| 240 | * |
| 241 | * and look at the resulting assemble code in serial.s. |
| 242 | * |
| 243 | * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 |
| 244 | * ----------------------------------------------------------------------- |
| 245 | */ |
| 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | static DEFINE_SPINLOCK(pio_lock); |
| 248 | |
| 249 | static inline struct esp_pio_buffer *get_pio_buffer(void) |
| 250 | { |
| 251 | struct esp_pio_buffer *buf; |
| 252 | unsigned long flags; |
| 253 | |
| 254 | spin_lock_irqsave(&pio_lock, flags); |
| 255 | if (free_pio_buf) { |
| 256 | buf = free_pio_buf; |
| 257 | free_pio_buf = buf->next; |
| 258 | } else { |
| 259 | buf = kmalloc(sizeof(struct esp_pio_buffer), GFP_ATOMIC); |
| 260 | } |
| 261 | spin_unlock_irqrestore(&pio_lock, flags); |
| 262 | return buf; |
| 263 | } |
| 264 | |
| 265 | static inline void release_pio_buffer(struct esp_pio_buffer *buf) |
| 266 | { |
| 267 | unsigned long flags; |
| 268 | spin_lock_irqsave(&pio_lock, flags); |
| 269 | buf->next = free_pio_buf; |
| 270 | free_pio_buf = buf; |
| 271 | spin_unlock_irqrestore(&pio_lock, flags); |
| 272 | } |
| 273 | |
| 274 | static inline void receive_chars_pio(struct esp_struct *info, int num_bytes) |
| 275 | { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 276 | struct tty_struct *tty = info->port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | int i; |
| 278 | struct esp_pio_buffer *pio_buf; |
| 279 | struct esp_pio_buffer *err_buf; |
| 280 | unsigned char status_mask; |
| 281 | |
| 282 | pio_buf = get_pio_buffer(); |
| 283 | |
| 284 | if (!pio_buf) |
| 285 | return; |
| 286 | |
| 287 | err_buf = get_pio_buffer(); |
| 288 | |
| 289 | if (!err_buf) { |
| 290 | release_pio_buffer(pio_buf); |
| 291 | return; |
| 292 | } |
| 293 | |
| 294 | status_mask = (info->read_status_mask >> 2) & 0x07; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | for (i = 0; i < num_bytes - 1; i += 2) { |
| 297 | *((unsigned short *)(pio_buf->data + i)) = |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 298 | inw(info->io_port + UART_ESI_RX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | err_buf->data[i] = serial_in(info, UART_ESI_RWS); |
| 300 | err_buf->data[i + 1] = (err_buf->data[i] >> 3) & status_mask; |
| 301 | err_buf->data[i] &= status_mask; |
| 302 | } |
| 303 | |
| 304 | if (num_bytes & 0x0001) { |
| 305 | pio_buf->data[num_bytes - 1] = serial_in(info, UART_ESI_RX); |
| 306 | err_buf->data[num_bytes - 1] = |
| 307 | (serial_in(info, UART_ESI_RWS) >> 3) & status_mask; |
| 308 | } |
| 309 | |
| 310 | /* make sure everything is still ok since interrupts were enabled */ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 311 | tty = info->port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | if (!tty) { |
| 314 | release_pio_buffer(pio_buf); |
| 315 | release_pio_buffer(err_buf); |
| 316 | info->stat_flags &= ~ESP_STAT_RX_TIMEOUT; |
| 317 | return; |
| 318 | } |
| 319 | |
| 320 | status_mask = (info->ignore_status_mask >> 2) & 0x07; |
| 321 | |
| 322 | for (i = 0; i < num_bytes; i++) { |
| 323 | if (!(err_buf->data[i] & status_mask)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 324 | int flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | if (err_buf->data[i] & 0x04) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 327 | flag = TTY_BREAK; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 328 | if (info->port.flags & ASYNC_SAK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | do_SAK(tty); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 330 | } else if (err_buf->data[i] & 0x02) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 331 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | else if (err_buf->data[i] & 0x01) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 333 | flag = TTY_PARITY; |
| 334 | tty_insert_flip_char(tty, pio_buf->data[i], flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | } |
| 336 | } |
| 337 | |
Paul Fulghum | 808249c | 2006-02-03 03:04:41 -0800 | [diff] [blame] | 338 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
| 340 | info->stat_flags &= ~ESP_STAT_RX_TIMEOUT; |
| 341 | release_pio_buffer(pio_buf); |
| 342 | release_pio_buffer(err_buf); |
| 343 | } |
| 344 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 345 | static void program_isa_dma(int dma, int dir, unsigned long addr, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
| 347 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 348 | |
| 349 | flags = claim_dma_lock(); |
| 350 | disable_dma(dma); |
| 351 | clear_dma_ff(dma); |
| 352 | set_dma_mode(dma, dir); |
| 353 | set_dma_addr(dma, addr); |
| 354 | set_dma_count(dma, len); |
| 355 | enable_dma(dma); |
| 356 | release_dma_lock(flags); |
| 357 | } |
| 358 | |
| 359 | static void receive_chars_dma(struct esp_struct *info, int num_bytes) |
| 360 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | info->stat_flags &= ~ESP_STAT_RX_TIMEOUT; |
| 362 | dma_bytes = num_bytes; |
| 363 | info->stat_flags |= ESP_STAT_DMA_RX; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 364 | |
| 365 | program_isa_dma(dma, DMA_MODE_READ, isa_virt_to_bus(dma_buffer), |
| 366 | dma_bytes); |
| 367 | serial_out(info, UART_ESI_CMD1, ESI_START_DMA_RX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | static inline void receive_chars_dma_done(struct esp_struct *info, |
| 371 | int status) |
| 372 | { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 373 | struct tty_struct *tty = info->port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | int num_bytes; |
| 375 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 376 | |
| 377 | flags = claim_dma_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | disable_dma(dma); |
| 379 | clear_dma_ff(dma); |
| 380 | |
| 381 | info->stat_flags &= ~ESP_STAT_DMA_RX; |
| 382 | num_bytes = dma_bytes - get_dma_residue(dma); |
| 383 | release_dma_lock(flags); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | info->icount.rx += num_bytes; |
| 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | if (num_bytes > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 388 | tty_insert_flip_string(tty, dma_buffer, num_bytes - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | status &= (0x1c & info->read_status_mask); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 391 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 392 | /* Is the status significant or do we throw the last byte ? */ |
| 393 | if (!(status & info->ignore_status_mask)) { |
| 394 | int statflag = 0; |
| 395 | |
| 396 | if (status & 0x10) { |
| 397 | statflag = TTY_BREAK; |
| 398 | (info->icount.brk)++; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 399 | if (info->port.flags & ASYNC_SAK) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 400 | do_SAK(tty); |
| 401 | } else if (status & 0x08) { |
| 402 | statflag = TTY_FRAME; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 403 | info->icount.frame++; |
| 404 | } else if (status & 0x04) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 405 | statflag = TTY_PARITY; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 406 | info->icount.parity++; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 407 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 408 | tty_insert_flip_char(tty, dma_buffer[num_bytes - 1], |
| 409 | statflag); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 410 | } |
Paul Fulghum | 808249c | 2006-02-03 03:04:41 -0800 | [diff] [blame] | 411 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | if (dma_bytes != num_bytes) { |
| 415 | num_bytes = dma_bytes - num_bytes; |
| 416 | dma_bytes = 0; |
| 417 | receive_chars_dma(info, num_bytes); |
| 418 | } else |
| 419 | dma_bytes = 0; |
| 420 | } |
| 421 | |
| 422 | /* Caller must hold info->lock */ |
| 423 | |
| 424 | static inline void transmit_chars_pio(struct esp_struct *info, |
| 425 | int space_avail) |
| 426 | { |
| 427 | int i; |
| 428 | struct esp_pio_buffer *pio_buf; |
| 429 | |
| 430 | pio_buf = get_pio_buffer(); |
| 431 | |
| 432 | if (!pio_buf) |
| 433 | return; |
| 434 | |
| 435 | while (space_avail && info->xmit_cnt) { |
| 436 | if (info->xmit_tail + space_avail <= ESP_XMIT_SIZE) { |
| 437 | memcpy(pio_buf->data, |
| 438 | &(info->xmit_buf[info->xmit_tail]), |
| 439 | space_avail); |
| 440 | } else { |
| 441 | i = ESP_XMIT_SIZE - info->xmit_tail; |
| 442 | memcpy(pio_buf->data, |
| 443 | &(info->xmit_buf[info->xmit_tail]), i); |
| 444 | memcpy(&(pio_buf->data[i]), info->xmit_buf, |
| 445 | space_avail - i); |
| 446 | } |
| 447 | |
| 448 | info->xmit_cnt -= space_avail; |
| 449 | info->xmit_tail = (info->xmit_tail + space_avail) & |
| 450 | (ESP_XMIT_SIZE - 1); |
| 451 | |
| 452 | for (i = 0; i < space_avail - 1; i += 2) { |
| 453 | outw(*((unsigned short *)(pio_buf->data + i)), |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 454 | info->io_port + UART_ESI_TX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | if (space_avail & 0x0001) |
| 458 | serial_out(info, UART_ESI_TX, |
| 459 | pio_buf->data[space_avail - 1]); |
| 460 | |
| 461 | if (info->xmit_cnt) { |
| 462 | serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND); |
| 463 | serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL); |
| 464 | space_avail = serial_in(info, UART_ESI_STAT1) << 8; |
| 465 | space_avail |= serial_in(info, UART_ESI_STAT2); |
| 466 | |
| 467 | if (space_avail > info->xmit_cnt) |
| 468 | space_avail = info->xmit_cnt; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | if (info->xmit_cnt < WAKEUP_CHARS) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 473 | if (info->port.tty) |
| 474 | tty_wakeup(info->port.tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
| 476 | #ifdef SERIAL_DEBUG_INTR |
| 477 | printk("THRE..."); |
| 478 | #endif |
| 479 | |
| 480 | if (info->xmit_cnt <= 0) { |
| 481 | info->IER &= ~UART_IER_THRI; |
| 482 | serial_out(info, UART_ESI_CMD1, |
| 483 | ESI_SET_SRV_MASK); |
| 484 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | release_pio_buffer(pio_buf); |
| 489 | } |
| 490 | |
| 491 | /* Caller must hold info->lock */ |
| 492 | static inline void transmit_chars_dma(struct esp_struct *info, int num_bytes) |
| 493 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | dma_bytes = num_bytes; |
| 495 | |
| 496 | if (info->xmit_tail + dma_bytes <= ESP_XMIT_SIZE) { |
| 497 | memcpy(dma_buffer, &(info->xmit_buf[info->xmit_tail]), |
| 498 | dma_bytes); |
| 499 | } else { |
| 500 | int i = ESP_XMIT_SIZE - info->xmit_tail; |
| 501 | memcpy(dma_buffer, &(info->xmit_buf[info->xmit_tail]), |
| 502 | i); |
| 503 | memcpy(&(dma_buffer[i]), info->xmit_buf, dma_bytes - i); |
| 504 | } |
| 505 | |
| 506 | info->xmit_cnt -= dma_bytes; |
| 507 | info->xmit_tail = (info->xmit_tail + dma_bytes) & (ESP_XMIT_SIZE - 1); |
| 508 | |
| 509 | if (info->xmit_cnt < WAKEUP_CHARS) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 510 | if (info->port.tty) |
| 511 | tty_wakeup(info->port.tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | #ifdef SERIAL_DEBUG_INTR |
| 514 | printk("THRE..."); |
| 515 | #endif |
| 516 | |
| 517 | if (info->xmit_cnt <= 0) { |
| 518 | info->IER &= ~UART_IER_THRI; |
| 519 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 520 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | info->stat_flags |= ESP_STAT_DMA_TX; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 525 | |
| 526 | program_isa_dma(dma, DMA_MODE_WRITE, isa_virt_to_bus(dma_buffer), |
| 527 | dma_bytes); |
| 528 | serial_out(info, UART_ESI_CMD1, ESI_START_DMA_TX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | static inline void transmit_chars_dma_done(struct esp_struct *info) |
| 532 | { |
| 533 | int num_bytes; |
| 534 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 536 | flags = claim_dma_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | disable_dma(dma); |
| 538 | clear_dma_ff(dma); |
| 539 | |
| 540 | num_bytes = dma_bytes - get_dma_residue(dma); |
| 541 | info->icount.tx += dma_bytes; |
| 542 | release_dma_lock(flags); |
| 543 | |
| 544 | if (dma_bytes != num_bytes) { |
| 545 | dma_bytes -= num_bytes; |
| 546 | memmove(dma_buffer, dma_buffer + num_bytes, dma_bytes); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 547 | |
| 548 | program_isa_dma(dma, DMA_MODE_WRITE, |
| 549 | isa_virt_to_bus(dma_buffer), dma_bytes); |
| 550 | |
| 551 | serial_out(info, UART_ESI_CMD1, ESI_START_DMA_TX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } else { |
| 553 | dma_bytes = 0; |
| 554 | info->stat_flags &= ~ESP_STAT_DMA_TX; |
| 555 | } |
| 556 | } |
| 557 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 558 | static void check_modem_status(struct esp_struct *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | { |
| 560 | int status; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT); |
| 563 | status = serial_in(info, UART_ESI_STAT2); |
| 564 | |
| 565 | if (status & UART_MSR_ANY_DELTA) { |
| 566 | /* update input line counters */ |
| 567 | if (status & UART_MSR_TERI) |
| 568 | info->icount.rng++; |
| 569 | if (status & UART_MSR_DDSR) |
| 570 | info->icount.dsr++; |
| 571 | if (status & UART_MSR_DDCD) |
| 572 | info->icount.dcd++; |
| 573 | if (status & UART_MSR_DCTS) |
| 574 | info->icount.cts++; |
| 575 | wake_up_interruptible(&info->delta_msr_wait); |
| 576 | } |
| 577 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 578 | if ((info->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR)) |
| 580 | printk("ttys%d CD now %s...", info->line, |
| 581 | (status & UART_MSR_DCD) ? "on" : "off"); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 582 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if (status & UART_MSR_DCD) |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 584 | wake_up_interruptible(&info->port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | else { |
| 586 | #ifdef SERIAL_DEBUG_OPEN |
| 587 | printk("scheduling hangup..."); |
| 588 | #endif |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 589 | tty_hangup(info->port.tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | /* |
| 595 | * This is the serial driver's interrupt routine |
| 596 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 597 | static irqreturn_t rs_interrupt_single(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 599 | struct esp_struct *info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | unsigned err_status; |
| 601 | unsigned int scratch; |
| 602 | |
| 603 | #ifdef SERIAL_DEBUG_INTR |
| 604 | printk("rs_interrupt_single(%d)...", irq); |
| 605 | #endif |
| 606 | info = (struct esp_struct *)dev_id; |
| 607 | err_status = 0; |
| 608 | scratch = serial_in(info, UART_ESI_SID); |
| 609 | |
| 610 | spin_lock(&info->lock); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 611 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 612 | if (!info->port.tty) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | spin_unlock(&info->lock); |
| 614 | return IRQ_NONE; |
| 615 | } |
| 616 | |
| 617 | if (scratch & 0x04) { /* error */ |
| 618 | serial_out(info, UART_ESI_CMD1, ESI_GET_ERR_STAT); |
| 619 | err_status = serial_in(info, UART_ESI_STAT1); |
| 620 | serial_in(info, UART_ESI_STAT2); |
| 621 | |
| 622 | if (err_status & 0x01) |
| 623 | info->stat_flags |= ESP_STAT_RX_TIMEOUT; |
| 624 | |
| 625 | if (err_status & 0x20) /* UART status */ |
| 626 | check_modem_status(info); |
| 627 | |
| 628 | if (err_status & 0x80) /* Start break */ |
| 629 | wake_up_interruptible(&info->break_wait); |
| 630 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | if ((scratch & 0x88) || /* DMA completed or timed out */ |
| 633 | (err_status & 0x1c) /* receive error */) { |
| 634 | if (info->stat_flags & ESP_STAT_DMA_RX) |
| 635 | receive_chars_dma_done(info, err_status); |
| 636 | else if (info->stat_flags & ESP_STAT_DMA_TX) |
| 637 | transmit_chars_dma_done(info); |
| 638 | } |
| 639 | |
| 640 | if (!(info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) && |
| 641 | ((scratch & 0x01) || (info->stat_flags & ESP_STAT_RX_TIMEOUT)) && |
| 642 | (info->IER & UART_IER_RDI)) { |
| 643 | int num_bytes; |
| 644 | |
| 645 | serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND); |
| 646 | serial_out(info, UART_ESI_CMD1, ESI_GET_RX_AVAIL); |
| 647 | num_bytes = serial_in(info, UART_ESI_STAT1) << 8; |
| 648 | num_bytes |= serial_in(info, UART_ESI_STAT2); |
| 649 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 650 | num_bytes = tty_buffer_request_room(info->port.tty, num_bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | if (num_bytes) { |
| 653 | if (dma_bytes || |
| 654 | (info->stat_flags & ESP_STAT_USE_PIO) || |
| 655 | (num_bytes <= info->config.pio_threshold)) |
| 656 | receive_chars_pio(info, num_bytes); |
| 657 | else |
| 658 | receive_chars_dma(info, num_bytes); |
| 659 | } |
| 660 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | if (!(info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) && |
| 663 | (scratch & 0x02) && (info->IER & UART_IER_THRI)) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 664 | if ((info->xmit_cnt <= 0) || info->port.tty->stopped) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | info->IER &= ~UART_IER_THRI; |
| 666 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 667 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 668 | } else { |
| 669 | int num_bytes; |
| 670 | |
| 671 | serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND); |
| 672 | serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL); |
| 673 | num_bytes = serial_in(info, UART_ESI_STAT1) << 8; |
| 674 | num_bytes |= serial_in(info, UART_ESI_STAT2); |
| 675 | |
| 676 | if (num_bytes > info->xmit_cnt) |
| 677 | num_bytes = info->xmit_cnt; |
| 678 | |
| 679 | if (num_bytes) { |
| 680 | if (dma_bytes || |
| 681 | (info->stat_flags & ESP_STAT_USE_PIO) || |
| 682 | (num_bytes <= info->config.pio_threshold)) |
| 683 | transmit_chars_pio(info, num_bytes); |
| 684 | else |
| 685 | transmit_chars_dma(info, num_bytes); |
| 686 | } |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | info->last_active = jiffies; |
| 691 | |
| 692 | #ifdef SERIAL_DEBUG_INTR |
| 693 | printk("end.\n"); |
| 694 | #endif |
| 695 | spin_unlock(&info->lock); |
| 696 | return IRQ_HANDLED; |
| 697 | } |
| 698 | |
| 699 | /* |
| 700 | * ------------------------------------------------------------------- |
| 701 | * Here ends the serial interrupt routines. |
| 702 | * ------------------------------------------------------------------- |
| 703 | */ |
| 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | /* |
| 706 | * --------------------------------------------------------------- |
| 707 | * Low level utility subroutines for the serial driver: routines to |
| 708 | * figure out the appropriate timeout for an interrupt chain, routines |
| 709 | * to initialize and startup a serial port, and routines to shutdown a |
| 710 | * serial port. Useful stuff like that. |
| 711 | * |
| 712 | * Caller should hold lock |
| 713 | * --------------------------------------------------------------- |
| 714 | */ |
| 715 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 716 | static void esp_basic_init(struct esp_struct *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | { |
| 718 | /* put ESPC in enhanced mode */ |
| 719 | serial_out(info, UART_ESI_CMD1, ESI_SET_MODE); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | if (info->stat_flags & ESP_STAT_NEVER_DMA) |
| 722 | serial_out(info, UART_ESI_CMD2, 0x01); |
| 723 | else |
| 724 | serial_out(info, UART_ESI_CMD2, 0x31); |
| 725 | |
| 726 | /* disable interrupts for now */ |
| 727 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 728 | serial_out(info, UART_ESI_CMD2, 0x00); |
| 729 | |
| 730 | /* set interrupt and DMA channel */ |
| 731 | serial_out(info, UART_ESI_CMD1, ESI_SET_IRQ); |
| 732 | |
| 733 | if (info->stat_flags & ESP_STAT_NEVER_DMA) |
| 734 | serial_out(info, UART_ESI_CMD2, 0x01); |
| 735 | else |
| 736 | serial_out(info, UART_ESI_CMD2, (dma << 4) | 0x01); |
| 737 | |
| 738 | serial_out(info, UART_ESI_CMD1, ESI_SET_ENH_IRQ); |
| 739 | |
| 740 | if (info->line % 8) /* secondary port */ |
| 741 | serial_out(info, UART_ESI_CMD2, 0x0d); /* shared */ |
| 742 | else if (info->irq == 9) |
| 743 | serial_out(info, UART_ESI_CMD2, 0x02); |
| 744 | else |
| 745 | serial_out(info, UART_ESI_CMD2, info->irq); |
| 746 | |
| 747 | /* set error status mask (check this) */ |
| 748 | serial_out(info, UART_ESI_CMD1, ESI_SET_ERR_MASK); |
| 749 | |
| 750 | if (info->stat_flags & ESP_STAT_NEVER_DMA) |
| 751 | serial_out(info, UART_ESI_CMD2, 0xa1); |
| 752 | else |
| 753 | serial_out(info, UART_ESI_CMD2, 0xbd); |
| 754 | |
| 755 | serial_out(info, UART_ESI_CMD2, 0x00); |
| 756 | |
| 757 | /* set DMA timeout */ |
| 758 | serial_out(info, UART_ESI_CMD1, ESI_SET_DMA_TMOUT); |
| 759 | serial_out(info, UART_ESI_CMD2, 0xff); |
| 760 | |
| 761 | /* set FIFO trigger levels */ |
| 762 | serial_out(info, UART_ESI_CMD1, ESI_SET_TRIGGER); |
| 763 | serial_out(info, UART_ESI_CMD2, info->config.rx_trigger >> 8); |
| 764 | serial_out(info, UART_ESI_CMD2, info->config.rx_trigger); |
| 765 | serial_out(info, UART_ESI_CMD2, info->config.tx_trigger >> 8); |
| 766 | serial_out(info, UART_ESI_CMD2, info->config.tx_trigger); |
| 767 | |
| 768 | /* Set clock scaling and wait states */ |
| 769 | serial_out(info, UART_ESI_CMD1, ESI_SET_PRESCALAR); |
| 770 | serial_out(info, UART_ESI_CMD2, 0x04 | ESPC_SCALE); |
| 771 | |
| 772 | /* set reinterrupt pacing */ |
| 773 | serial_out(info, UART_ESI_CMD1, ESI_SET_REINTR); |
| 774 | serial_out(info, UART_ESI_CMD2, 0xff); |
| 775 | } |
| 776 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 777 | static int startup(struct esp_struct *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | { |
| 779 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 780 | int retval = 0; |
| 781 | unsigned int num_chars; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 783 | spin_lock_irqsave(&info->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 785 | if (info->port.flags & ASYNC_INITIALIZED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | goto out; |
| 787 | |
| 788 | if (!info->xmit_buf) { |
| 789 | info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_ATOMIC); |
| 790 | retval = -ENOMEM; |
| 791 | if (!info->xmit_buf) |
| 792 | goto out; |
| 793 | } |
| 794 | |
| 795 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 796 | printk(KERN_DEBUG "starting up ttys%d (irq %d)...", |
| 797 | info->line, info->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | #endif |
| 799 | |
| 800 | /* Flush the RX buffer. Using the ESI flush command may cause */ |
| 801 | /* wild interrupts, so read all the data instead. */ |
| 802 | |
| 803 | serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND); |
| 804 | serial_out(info, UART_ESI_CMD1, ESI_GET_RX_AVAIL); |
| 805 | num_chars = serial_in(info, UART_ESI_STAT1) << 8; |
| 806 | num_chars |= serial_in(info, UART_ESI_STAT2); |
| 807 | |
| 808 | while (num_chars > 1) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 809 | inw(info->io_port + UART_ESI_RX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | num_chars -= 2; |
| 811 | } |
| 812 | |
| 813 | if (num_chars) |
| 814 | serial_in(info, UART_ESI_RX); |
| 815 | |
| 816 | /* set receive character timeout */ |
| 817 | serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT); |
| 818 | serial_out(info, UART_ESI_CMD2, info->config.rx_timeout); |
| 819 | |
| 820 | /* clear all flags except the "never DMA" flag */ |
| 821 | info->stat_flags &= ESP_STAT_NEVER_DMA; |
| 822 | |
| 823 | if (info->stat_flags & ESP_STAT_NEVER_DMA) |
| 824 | info->stat_flags |= ESP_STAT_USE_PIO; |
| 825 | |
| 826 | spin_unlock_irqrestore(&info->lock, flags); |
| 827 | |
| 828 | /* |
| 829 | * Allocate the IRQ |
| 830 | */ |
| 831 | |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 832 | retval = request_irq(info->irq, rs_interrupt_single, IRQF_SHARED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | "esp serial", info); |
| 834 | |
| 835 | if (retval) { |
| 836 | if (capable(CAP_SYS_ADMIN)) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 837 | if (info->port.tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | set_bit(TTY_IO_ERROR, |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 839 | &info->port.tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | retval = 0; |
| 841 | } |
| 842 | goto out_unlocked; |
| 843 | } |
| 844 | |
| 845 | if (!(info->stat_flags & ESP_STAT_USE_PIO) && !dma_buffer) { |
| 846 | dma_buffer = (char *)__get_dma_pages( |
| 847 | GFP_KERNEL, get_order(DMA_BUFFER_SZ)); |
| 848 | |
| 849 | /* use PIO mode if DMA buf/chan cannot be allocated */ |
| 850 | if (!dma_buffer) |
| 851 | info->stat_flags |= ESP_STAT_USE_PIO; |
| 852 | else if (request_dma(dma, "esp serial")) { |
| 853 | free_pages((unsigned long)dma_buffer, |
| 854 | get_order(DMA_BUFFER_SZ)); |
| 855 | dma_buffer = NULL; |
| 856 | info->stat_flags |= ESP_STAT_USE_PIO; |
| 857 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | info->MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2; |
| 862 | |
| 863 | spin_lock_irqsave(&info->lock, flags); |
| 864 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 865 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 866 | serial_out(info, UART_ESI_CMD2, info->MCR); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 867 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | /* |
| 869 | * Finally, enable interrupts |
| 870 | */ |
| 871 | /* info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; */ |
| 872 | info->IER = UART_IER_RLSI | UART_IER_RDI | UART_IER_DMA_TMOUT | |
| 873 | UART_IER_DMA_TC; |
| 874 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 875 | serial_out(info, UART_ESI_CMD2, info->IER); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 876 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 877 | if (info->port.tty) |
| 878 | clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| 880 | spin_unlock_irqrestore(&info->lock, flags); |
| 881 | |
| 882 | /* |
| 883 | * Set up the tty->alt_speed kludge |
| 884 | */ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 885 | if (info->port.tty) { |
| 886 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 887 | info->port.tty->alt_speed = 57600; |
| 888 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 889 | info->port.tty->alt_speed = 115200; |
| 890 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 891 | info->port.tty->alt_speed = 230400; |
| 892 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 893 | info->port.tty->alt_speed = 460800; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | /* |
| 897 | * set the speed of the serial port |
| 898 | */ |
| 899 | change_speed(info); |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 900 | info->port.flags |= ASYNC_INITIALIZED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | return 0; |
| 902 | |
| 903 | out: |
| 904 | spin_unlock_irqrestore(&info->lock, flags); |
| 905 | out_unlocked: |
| 906 | return retval; |
| 907 | } |
| 908 | |
| 909 | /* |
| 910 | * This routine will shutdown a serial port; interrupts are disabled, and |
| 911 | * DTR is dropped if the hangup on close termio flag is on. |
| 912 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 913 | static void shutdown(struct esp_struct *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | { |
| 915 | unsigned long flags, f; |
| 916 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 917 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | return; |
| 919 | |
| 920 | #ifdef SERIAL_DEBUG_OPEN |
| 921 | printk("Shutting down serial port %d (irq %d)....", info->line, |
| 922 | info->irq); |
| 923 | #endif |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | spin_lock_irqsave(&info->lock, flags); |
| 926 | /* |
| 927 | * clear delta_msr_wait queue to avoid mem leaks: we may free the irq |
| 928 | * here so the queue might never be waken up |
| 929 | */ |
| 930 | wake_up_interruptible(&info->delta_msr_wait); |
| 931 | wake_up_interruptible(&info->break_wait); |
| 932 | |
| 933 | /* stop a DMA transfer on the port being closed */ |
| 934 | /* DMA lock is higher priority always */ |
| 935 | if (info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 936 | f = claim_dma_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | disable_dma(dma); |
| 938 | clear_dma_ff(dma); |
| 939 | release_dma_lock(f); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | dma_bytes = 0; |
| 942 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 943 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | /* |
| 945 | * Free the IRQ |
| 946 | */ |
| 947 | free_irq(info->irq, info); |
| 948 | |
| 949 | if (dma_buffer) { |
| 950 | struct esp_struct *current_port = ports; |
| 951 | |
| 952 | while (current_port) { |
| 953 | if ((current_port != info) && |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 954 | (current_port->port.flags & ASYNC_INITIALIZED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | break; |
| 956 | |
| 957 | current_port = current_port->next_port; |
| 958 | } |
| 959 | |
| 960 | if (!current_port) { |
| 961 | free_dma(dma); |
| 962 | free_pages((unsigned long)dma_buffer, |
| 963 | get_order(DMA_BUFFER_SZ)); |
| 964 | dma_buffer = NULL; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 965 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | if (info->xmit_buf) { |
| 969 | free_page((unsigned long) info->xmit_buf); |
| 970 | info->xmit_buf = NULL; |
| 971 | } |
| 972 | |
| 973 | info->IER = 0; |
| 974 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 975 | serial_out(info, UART_ESI_CMD2, 0x00); |
| 976 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 977 | if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS); |
| 979 | |
| 980 | info->MCR &= ~UART_MCR_OUT2; |
| 981 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 982 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 983 | serial_out(info, UART_ESI_CMD2, info->MCR); |
| 984 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 985 | if (info->port.tty) |
| 986 | set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 987 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 988 | info->port.flags &= ~ASYNC_INITIALIZED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | spin_unlock_irqrestore(&info->lock, flags); |
| 990 | } |
| 991 | |
| 992 | /* |
| 993 | * This routine is called to set the UART divisor registers to match |
| 994 | * the specified baud rate for a serial port. |
| 995 | */ |
| 996 | static void change_speed(struct esp_struct *info) |
| 997 | { |
| 998 | unsigned short port; |
| 999 | int quot = 0; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1000 | unsigned cflag, cval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | int baud, bits; |
| 1002 | unsigned char flow1 = 0, flow2 = 0; |
| 1003 | unsigned long flags; |
| 1004 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1005 | if (!info->port.tty || !info->port.tty->termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | return; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1007 | cflag = info->port.tty->termios->c_cflag; |
| 1008 | port = info->io_port; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1009 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | /* byte size and parity */ |
| 1011 | switch (cflag & CSIZE) { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1012 | case CS5: cval = 0x00; bits = 7; break; |
| 1013 | case CS6: cval = 0x01; bits = 8; break; |
| 1014 | case CS7: cval = 0x02; bits = 9; break; |
| 1015 | case CS8: cval = 0x03; bits = 10; break; |
| 1016 | default: cval = 0x00; bits = 7; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | } |
| 1018 | if (cflag & CSTOPB) { |
| 1019 | cval |= 0x04; |
| 1020 | bits++; |
| 1021 | } |
| 1022 | if (cflag & PARENB) { |
| 1023 | cval |= UART_LCR_PARITY; |
| 1024 | bits++; |
| 1025 | } |
| 1026 | if (!(cflag & PARODD)) |
| 1027 | cval |= UART_LCR_EPAR; |
| 1028 | #ifdef CMSPAR |
| 1029 | if (cflag & CMSPAR) |
| 1030 | cval |= UART_LCR_SPAR; |
| 1031 | #endif |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1032 | baud = tty_get_baud_rate(info->port.tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | if (baud == 38400 && |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1034 | ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | quot = info->custom_divisor; |
| 1036 | else { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1037 | if (baud == 134) /* Special case since 134 is really 134.5 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | quot = (2*BASE_BAUD / 269); |
| 1039 | else if (baud) |
| 1040 | quot = BASE_BAUD / baud; |
| 1041 | } |
| 1042 | /* If the quotient is ever zero, default to 9600 bps */ |
| 1043 | if (!quot) |
| 1044 | quot = BASE_BAUD / 9600; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1045 | |
| 1046 | if (baud) { |
| 1047 | /* Actual rate */ |
| 1048 | baud = BASE_BAUD/quot; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1049 | tty_encode_baud_rate(info->port.tty, baud, baud); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1050 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | info->timeout = ((1024 * HZ * bits * quot) / BASE_BAUD) + (HZ / 50); |
| 1052 | |
| 1053 | /* CTS flow control flag and modem status interrupts */ |
| 1054 | /* info->IER &= ~UART_IER_MSI; */ |
| 1055 | if (cflag & CRTSCTS) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1056 | info->port.flags |= ASYNC_CTS_FLOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | /* info->IER |= UART_IER_MSI; */ |
| 1058 | flow1 = 0x04; |
| 1059 | flow2 = 0x10; |
| 1060 | } else |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1061 | info->port.flags &= ~ASYNC_CTS_FLOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | if (cflag & CLOCAL) |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1063 | info->port.flags &= ~ASYNC_CHECK_CD; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1064 | else |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1065 | info->port.flags |= ASYNC_CHECK_CD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | |
| 1067 | /* |
| 1068 | * Set up parity check flag |
| 1069 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1071 | if (I_INPCK(info->port.tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1073 | if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | info->read_status_mask |= UART_LSR_BI; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | info->ignore_status_mask = 0; |
| 1077 | #if 0 |
| 1078 | /* This should be safe, but for some broken bits of hardware... */ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1079 | if (I_IGNPAR(info->port.tty)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; |
| 1081 | info->read_status_mask |= UART_LSR_PE | UART_LSR_FE; |
| 1082 | } |
| 1083 | #endif |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1084 | if (I_IGNBRK(info->port.tty)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | info->ignore_status_mask |= UART_LSR_BI; |
| 1086 | info->read_status_mask |= UART_LSR_BI; |
| 1087 | /* |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1088 | * If we're ignore parity and break indicators, ignore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | * overruns too. (For real raw support). |
| 1090 | */ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1091 | if (I_IGNPAR(info->port.tty)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | info->ignore_status_mask |= UART_LSR_OE | \ |
| 1093 | UART_LSR_PE | UART_LSR_FE; |
| 1094 | info->read_status_mask |= UART_LSR_OE | \ |
| 1095 | UART_LSR_PE | UART_LSR_FE; |
| 1096 | } |
| 1097 | } |
| 1098 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1099 | if (I_IXOFF(info->port.tty)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | flow1 |= 0x81; |
| 1101 | |
| 1102 | spin_lock_irqsave(&info->lock, flags); |
| 1103 | /* set baud */ |
| 1104 | serial_out(info, UART_ESI_CMD1, ESI_SET_BAUD); |
| 1105 | serial_out(info, UART_ESI_CMD2, quot >> 8); |
| 1106 | serial_out(info, UART_ESI_CMD2, quot & 0xff); |
| 1107 | |
| 1108 | /* set data bits, parity, etc. */ |
| 1109 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 1110 | serial_out(info, UART_ESI_CMD2, UART_LCR); |
| 1111 | serial_out(info, UART_ESI_CMD2, cval); |
| 1112 | |
| 1113 | /* Enable flow control */ |
| 1114 | serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_CNTL); |
| 1115 | serial_out(info, UART_ESI_CMD2, flow1); |
| 1116 | serial_out(info, UART_ESI_CMD2, flow2); |
| 1117 | |
| 1118 | /* set flow control characters (XON/XOFF only) */ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1119 | if (I_IXOFF(info->port.tty)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_CHARS); |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1121 | serial_out(info, UART_ESI_CMD2, START_CHAR(info->port.tty)); |
| 1122 | serial_out(info, UART_ESI_CMD2, STOP_CHAR(info->port.tty)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | serial_out(info, UART_ESI_CMD2, 0x10); |
| 1124 | serial_out(info, UART_ESI_CMD2, 0x21); |
| 1125 | switch (cflag & CSIZE) { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1126 | case CS5: |
| 1127 | serial_out(info, UART_ESI_CMD2, 0x1f); |
| 1128 | break; |
| 1129 | case CS6: |
| 1130 | serial_out(info, UART_ESI_CMD2, 0x3f); |
| 1131 | break; |
| 1132 | case CS7: |
| 1133 | case CS8: |
| 1134 | serial_out(info, UART_ESI_CMD2, 0x7f); |
| 1135 | break; |
| 1136 | default: |
| 1137 | serial_out(info, UART_ESI_CMD2, 0xff); |
| 1138 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | /* Set high/low water */ |
| 1143 | serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_LVL); |
| 1144 | serial_out(info, UART_ESI_CMD2, info->config.flow_off >> 8); |
| 1145 | serial_out(info, UART_ESI_CMD2, info->config.flow_off); |
| 1146 | serial_out(info, UART_ESI_CMD2, info->config.flow_on >> 8); |
| 1147 | serial_out(info, UART_ESI_CMD2, info->config.flow_on); |
| 1148 | |
| 1149 | spin_unlock_irqrestore(&info->lock, flags); |
| 1150 | } |
| 1151 | |
Alan Cox | 76b25a5 | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1152 | static int rs_put_char(struct tty_struct *tty, unsigned char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1154 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | unsigned long flags; |
Alan Cox | 76b25a5 | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1156 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
| 1158 | if (serial_paranoia_check(info, tty->name, "rs_put_char")) |
Alan Cox | 76b25a5 | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1159 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | |
Eric Sesterhenn | a2f20c7 | 2006-06-25 05:48:46 -0700 | [diff] [blame] | 1161 | if (!info->xmit_buf) |
Alan Cox | 76b25a5 | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1162 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
| 1164 | spin_lock_irqsave(&info->lock, flags); |
| 1165 | if (info->xmit_cnt < ESP_XMIT_SIZE - 1) { |
| 1166 | info->xmit_buf[info->xmit_head++] = ch; |
| 1167 | info->xmit_head &= ESP_XMIT_SIZE-1; |
| 1168 | info->xmit_cnt++; |
Alan Cox | 76b25a5 | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1169 | ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | } |
| 1171 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | 76b25a5 | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1172 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | } |
| 1174 | |
| 1175 | static void rs_flush_chars(struct tty_struct *tty) |
| 1176 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1177 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | if (serial_paranoia_check(info, tty->name, "rs_flush_chars")) |
| 1181 | return; |
| 1182 | |
| 1183 | spin_lock_irqsave(&info->lock, flags); |
| 1184 | |
| 1185 | if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf) |
| 1186 | goto out; |
| 1187 | |
| 1188 | if (!(info->IER & UART_IER_THRI)) { |
| 1189 | info->IER |= UART_IER_THRI; |
| 1190 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 1191 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 1192 | } |
| 1193 | out: |
| 1194 | spin_unlock_irqrestore(&info->lock, flags); |
| 1195 | } |
| 1196 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1197 | static int rs_write(struct tty_struct *tty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | const unsigned char *buf, int count) |
| 1199 | { |
| 1200 | int c, t, ret = 0; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1201 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | unsigned long flags; |
| 1203 | |
| 1204 | if (serial_paranoia_check(info, tty->name, "rs_write")) |
| 1205 | return 0; |
| 1206 | |
Eric Sesterhenn | a2f20c7 | 2006-06-25 05:48:46 -0700 | [diff] [blame] | 1207 | if (!info->xmit_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | return 0; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | while (1) { |
| 1211 | /* Thanks to R. Wolff for suggesting how to do this with */ |
| 1212 | /* interrupts enabled */ |
| 1213 | |
| 1214 | c = count; |
| 1215 | t = ESP_XMIT_SIZE - info->xmit_cnt - 1; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | if (t < c) |
| 1218 | c = t; |
| 1219 | |
| 1220 | t = ESP_XMIT_SIZE - info->xmit_head; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | if (t < c) |
| 1223 | c = t; |
| 1224 | |
| 1225 | if (c <= 0) |
| 1226 | break; |
| 1227 | |
| 1228 | memcpy(info->xmit_buf + info->xmit_head, buf, c); |
| 1229 | |
| 1230 | info->xmit_head = (info->xmit_head + c) & (ESP_XMIT_SIZE-1); |
| 1231 | info->xmit_cnt += c; |
| 1232 | buf += c; |
| 1233 | count -= c; |
| 1234 | ret += c; |
| 1235 | } |
| 1236 | |
| 1237 | spin_lock_irqsave(&info->lock, flags); |
| 1238 | |
| 1239 | if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) { |
| 1240 | info->IER |= UART_IER_THRI; |
| 1241 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 1242 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 1243 | } |
| 1244 | |
| 1245 | spin_unlock_irqrestore(&info->lock, flags); |
| 1246 | return ret; |
| 1247 | } |
| 1248 | |
| 1249 | static int rs_write_room(struct tty_struct *tty) |
| 1250 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1251 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | int ret; |
| 1253 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | if (serial_paranoia_check(info, tty->name, "rs_write_room")) |
| 1256 | return 0; |
| 1257 | |
| 1258 | spin_lock_irqsave(&info->lock, flags); |
| 1259 | |
| 1260 | ret = ESP_XMIT_SIZE - info->xmit_cnt - 1; |
| 1261 | if (ret < 0) |
| 1262 | ret = 0; |
| 1263 | spin_unlock_irqrestore(&info->lock, flags); |
| 1264 | return ret; |
| 1265 | } |
| 1266 | |
| 1267 | static int rs_chars_in_buffer(struct tty_struct *tty) |
| 1268 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1269 | struct esp_struct *info = tty->driver_data; |
| 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer")) |
| 1272 | return 0; |
| 1273 | return info->xmit_cnt; |
| 1274 | } |
| 1275 | |
| 1276 | static void rs_flush_buffer(struct tty_struct *tty) |
| 1277 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1278 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | if (serial_paranoia_check(info, tty->name, "rs_flush_buffer")) |
| 1282 | return; |
| 1283 | spin_lock_irqsave(&info->lock, flags); |
| 1284 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| 1285 | spin_unlock_irqrestore(&info->lock, flags); |
| 1286 | tty_wakeup(tty); |
| 1287 | } |
| 1288 | |
| 1289 | /* |
| 1290 | * ------------------------------------------------------------ |
| 1291 | * rs_throttle() |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1292 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | * This routine is called by the upper-layer tty layer to signal that |
| 1294 | * incoming characters should be throttled. |
| 1295 | * ------------------------------------------------------------ |
| 1296 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1297 | static void rs_throttle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1299 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | unsigned long flags; |
| 1301 | #ifdef SERIAL_DEBUG_THROTTLE |
| 1302 | char buf[64]; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | printk("throttle %s: %d....\n", tty_name(tty, buf), |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1305 | tty_chars_in_buffer(tty)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | #endif |
| 1307 | |
| 1308 | if (serial_paranoia_check(info, tty->name, "rs_throttle")) |
| 1309 | return; |
| 1310 | |
| 1311 | spin_lock_irqsave(&info->lock, flags); |
| 1312 | info->IER &= ~UART_IER_RDI; |
| 1313 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 1314 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 1315 | serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT); |
| 1316 | serial_out(info, UART_ESI_CMD2, 0x00); |
| 1317 | spin_unlock_irqrestore(&info->lock, flags); |
| 1318 | } |
| 1319 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1320 | static void rs_unthrottle(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1322 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | unsigned long flags; |
| 1324 | #ifdef SERIAL_DEBUG_THROTTLE |
| 1325 | char buf[64]; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1326 | |
| 1327 | printk(KERN_DEBUG "unthrottle %s: %d....\n", tty_name(tty, buf), |
| 1328 | tty_chars_in_buffer(tty)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | #endif |
| 1330 | |
| 1331 | if (serial_paranoia_check(info, tty->name, "rs_unthrottle")) |
| 1332 | return; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | spin_lock_irqsave(&info->lock, flags); |
| 1335 | info->IER |= UART_IER_RDI; |
| 1336 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 1337 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 1338 | serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT); |
| 1339 | serial_out(info, UART_ESI_CMD2, info->config.rx_timeout); |
| 1340 | spin_unlock_irqrestore(&info->lock, flags); |
| 1341 | } |
| 1342 | |
| 1343 | /* |
| 1344 | * ------------------------------------------------------------ |
| 1345 | * rs_ioctl() and friends |
| 1346 | * ------------------------------------------------------------ |
| 1347 | */ |
| 1348 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1349 | static int get_serial_info(struct esp_struct *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | struct serial_struct __user *retinfo) |
| 1351 | { |
| 1352 | struct serial_struct tmp; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1353 | |
Alan Cox | 5a4bc8c1 | 2008-04-30 00:53:18 -0700 | [diff] [blame] | 1354 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | memset(&tmp, 0, sizeof(tmp)); |
| 1356 | tmp.type = PORT_16550A; |
| 1357 | tmp.line = info->line; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1358 | tmp.port = info->io_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | tmp.irq = info->irq; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1360 | tmp.flags = info->port.flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | tmp.xmit_fifo_size = 1024; |
| 1362 | tmp.baud_base = BASE_BAUD; |
| 1363 | tmp.close_delay = info->close_delay; |
| 1364 | tmp.closing_wait = info->closing_wait; |
| 1365 | tmp.custom_divisor = info->custom_divisor; |
| 1366 | tmp.hub6 = 0; |
Alan Cox | 5a4bc8c1 | 2008-04-30 00:53:18 -0700 | [diff] [blame] | 1367 | unlock_kernel(); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1368 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | return -EFAULT; |
| 1370 | return 0; |
| 1371 | } |
| 1372 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1373 | static int get_esp_config(struct esp_struct *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | struct hayes_esp_config __user *retinfo) |
| 1375 | { |
| 1376 | struct hayes_esp_config tmp; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | if (!retinfo) |
| 1379 | return -EFAULT; |
| 1380 | |
| 1381 | memset(&tmp, 0, sizeof(tmp)); |
Alan Cox | 5a4bc8c1 | 2008-04-30 00:53:18 -0700 | [diff] [blame] | 1382 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | tmp.rx_timeout = info->config.rx_timeout; |
| 1384 | tmp.rx_trigger = info->config.rx_trigger; |
| 1385 | tmp.tx_trigger = info->config.tx_trigger; |
| 1386 | tmp.flow_off = info->config.flow_off; |
| 1387 | tmp.flow_on = info->config.flow_on; |
| 1388 | tmp.pio_threshold = info->config.pio_threshold; |
| 1389 | tmp.dma_channel = (info->stat_flags & ESP_STAT_NEVER_DMA ? 0 : dma); |
Alan Cox | 5a4bc8c1 | 2008-04-30 00:53:18 -0700 | [diff] [blame] | 1390 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | |
| 1392 | return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; |
| 1393 | } |
| 1394 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1395 | static int set_serial_info(struct esp_struct *info, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | struct serial_struct __user *new_info) |
| 1397 | { |
| 1398 | struct serial_struct new_serial; |
| 1399 | struct esp_struct old_info; |
| 1400 | unsigned int change_irq; |
| 1401 | int retval = 0; |
| 1402 | struct esp_struct *current_async; |
| 1403 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1404 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | return -EFAULT; |
| 1406 | old_info = *info; |
| 1407 | |
| 1408 | if ((new_serial.type != PORT_16550A) || |
| 1409 | (new_serial.hub6) || |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1410 | (info->io_port != new_serial.port) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | (new_serial.baud_base != BASE_BAUD) || |
| 1412 | (new_serial.irq > 15) || |
| 1413 | (new_serial.irq < 2) || |
| 1414 | (new_serial.irq == 6) || |
| 1415 | (new_serial.irq == 8) || |
| 1416 | (new_serial.irq == 13)) |
| 1417 | return -EINVAL; |
| 1418 | |
| 1419 | change_irq = new_serial.irq != info->irq; |
| 1420 | |
| 1421 | if (change_irq && (info->line % 8)) |
| 1422 | return -EINVAL; |
| 1423 | |
| 1424 | if (!capable(CAP_SYS_ADMIN)) { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1425 | if (change_irq || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | (new_serial.close_delay != info->close_delay) || |
| 1427 | ((new_serial.flags & ~ASYNC_USR_MASK) != |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1428 | (info->port.flags & ~ASYNC_USR_MASK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | return -EPERM; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1430 | info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | (new_serial.flags & ASYNC_USR_MASK)); |
| 1432 | info->custom_divisor = new_serial.custom_divisor; |
| 1433 | } else { |
| 1434 | if (new_serial.irq == 2) |
| 1435 | new_serial.irq = 9; |
| 1436 | |
| 1437 | if (change_irq) { |
| 1438 | current_async = ports; |
| 1439 | |
| 1440 | while (current_async) { |
| 1441 | if ((current_async->line >= info->line) && |
| 1442 | (current_async->line < (info->line + 8))) { |
| 1443 | if (current_async == info) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1444 | if (current_async->port.count > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | return -EBUSY; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1446 | } else if (current_async->port.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | return -EBUSY; |
| 1448 | } |
| 1449 | |
| 1450 | current_async = current_async->next_port; |
| 1451 | } |
| 1452 | } |
| 1453 | |
| 1454 | /* |
| 1455 | * OK, past this point, all the error checking has been done. |
| 1456 | * At this point, we start making changes..... |
| 1457 | */ |
| 1458 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1459 | info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | (new_serial.flags & ASYNC_FLAGS)); |
| 1461 | info->custom_divisor = new_serial.custom_divisor; |
| 1462 | info->close_delay = new_serial.close_delay * HZ/100; |
| 1463 | info->closing_wait = new_serial.closing_wait * HZ/100; |
| 1464 | |
| 1465 | if (change_irq) { |
| 1466 | /* |
| 1467 | * We need to shutdown the serial port at the old |
| 1468 | * port/irq combination. |
| 1469 | */ |
| 1470 | shutdown(info); |
| 1471 | |
| 1472 | current_async = ports; |
| 1473 | |
| 1474 | while (current_async) { |
| 1475 | if ((current_async->line >= info->line) && |
| 1476 | (current_async->line < (info->line + 8))) |
| 1477 | current_async->irq = new_serial.irq; |
| 1478 | |
| 1479 | current_async = current_async->next_port; |
| 1480 | } |
| 1481 | |
| 1482 | serial_out(info, UART_ESI_CMD1, ESI_SET_ENH_IRQ); |
| 1483 | if (info->irq == 9) |
| 1484 | serial_out(info, UART_ESI_CMD2, 0x02); |
| 1485 | else |
| 1486 | serial_out(info, UART_ESI_CMD2, info->irq); |
| 1487 | } |
| 1488 | } |
| 1489 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1490 | if (info->port.flags & ASYNC_INITIALIZED) { |
| 1491 | if (((old_info.port.flags & ASYNC_SPD_MASK) != |
| 1492 | (info->port.flags & ASYNC_SPD_MASK)) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | (old_info.custom_divisor != info->custom_divisor)) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1494 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 1495 | info->port.tty->alt_speed = 57600; |
| 1496 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 1497 | info->port.tty->alt_speed = 115200; |
| 1498 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 1499 | info->port.tty->alt_speed = 230400; |
| 1500 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 1501 | info->port.tty->alt_speed = 460800; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | change_speed(info); |
| 1503 | } |
| 1504 | } else |
| 1505 | retval = startup(info); |
| 1506 | |
| 1507 | return retval; |
| 1508 | } |
| 1509 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1510 | static int set_esp_config(struct esp_struct *info, |
| 1511 | struct hayes_esp_config __user *new_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | { |
| 1513 | struct hayes_esp_config new_config; |
| 1514 | unsigned int change_dma; |
| 1515 | int retval = 0; |
| 1516 | struct esp_struct *current_async; |
| 1517 | unsigned long flags; |
| 1518 | |
| 1519 | /* Perhaps a non-sysadmin user should be able to do some of these */ |
| 1520 | /* operations. I haven't decided yet. */ |
| 1521 | |
| 1522 | if (!capable(CAP_SYS_ADMIN)) |
| 1523 | return -EPERM; |
| 1524 | |
| 1525 | if (copy_from_user(&new_config, new_info, sizeof(new_config))) |
| 1526 | return -EFAULT; |
| 1527 | |
| 1528 | if ((new_config.flow_on >= new_config.flow_off) || |
| 1529 | (new_config.rx_trigger < 1) || |
| 1530 | (new_config.tx_trigger < 1) || |
| 1531 | (new_config.flow_off < 1) || |
| 1532 | (new_config.flow_on < 1) || |
| 1533 | (new_config.rx_trigger > 1023) || |
| 1534 | (new_config.tx_trigger > 1023) || |
| 1535 | (new_config.flow_off > 1023) || |
| 1536 | (new_config.flow_on > 1023) || |
| 1537 | (new_config.pio_threshold < 0) || |
| 1538 | (new_config.pio_threshold > 1024)) |
| 1539 | return -EINVAL; |
| 1540 | |
| 1541 | if ((new_config.dma_channel != 1) && (new_config.dma_channel != 3)) |
| 1542 | new_config.dma_channel = 0; |
| 1543 | |
| 1544 | if (info->stat_flags & ESP_STAT_NEVER_DMA) |
| 1545 | change_dma = new_config.dma_channel; |
| 1546 | else |
| 1547 | change_dma = (new_config.dma_channel != dma); |
| 1548 | |
| 1549 | if (change_dma) { |
| 1550 | if (new_config.dma_channel) { |
| 1551 | /* PIO mode to DMA mode transition OR */ |
| 1552 | /* change current DMA channel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | current_async = ports; |
| 1554 | |
| 1555 | while (current_async) { |
| 1556 | if (current_async == info) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1557 | if (current_async->port.count > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | return -EBUSY; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1559 | } else if (current_async->port.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | return -EBUSY; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1561 | |
| 1562 | current_async = current_async->next_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | } |
| 1564 | |
| 1565 | shutdown(info); |
| 1566 | dma = new_config.dma_channel; |
| 1567 | info->stat_flags &= ~ESP_STAT_NEVER_DMA; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1568 | |
| 1569 | /* all ports must use the same DMA channel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
| 1571 | spin_lock_irqsave(&info->lock, flags); |
| 1572 | current_async = ports; |
| 1573 | |
| 1574 | while (current_async) { |
| 1575 | esp_basic_init(current_async); |
| 1576 | current_async = current_async->next_port; |
| 1577 | } |
| 1578 | spin_unlock_irqrestore(&info->lock, flags); |
| 1579 | } else { |
| 1580 | /* DMA mode to PIO mode only */ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1581 | if (info->port.count > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | return -EBUSY; |
| 1583 | |
| 1584 | shutdown(info); |
| 1585 | spin_lock_irqsave(&info->lock, flags); |
| 1586 | info->stat_flags |= ESP_STAT_NEVER_DMA; |
| 1587 | esp_basic_init(info); |
| 1588 | spin_unlock_irqrestore(&info->lock, flags); |
| 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | info->config.pio_threshold = new_config.pio_threshold; |
| 1593 | |
| 1594 | if ((new_config.flow_off != info->config.flow_off) || |
| 1595 | (new_config.flow_on != info->config.flow_on)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | info->config.flow_off = new_config.flow_off; |
| 1597 | info->config.flow_on = new_config.flow_on; |
| 1598 | |
| 1599 | spin_lock_irqsave(&info->lock, flags); |
| 1600 | serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_LVL); |
| 1601 | serial_out(info, UART_ESI_CMD2, new_config.flow_off >> 8); |
| 1602 | serial_out(info, UART_ESI_CMD2, new_config.flow_off); |
| 1603 | serial_out(info, UART_ESI_CMD2, new_config.flow_on >> 8); |
| 1604 | serial_out(info, UART_ESI_CMD2, new_config.flow_on); |
| 1605 | spin_unlock_irqrestore(&info->lock, flags); |
| 1606 | } |
| 1607 | |
| 1608 | if ((new_config.rx_trigger != info->config.rx_trigger) || |
| 1609 | (new_config.tx_trigger != info->config.tx_trigger)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | info->config.rx_trigger = new_config.rx_trigger; |
| 1611 | info->config.tx_trigger = new_config.tx_trigger; |
| 1612 | spin_lock_irqsave(&info->lock, flags); |
| 1613 | serial_out(info, UART_ESI_CMD1, ESI_SET_TRIGGER); |
| 1614 | serial_out(info, UART_ESI_CMD2, |
| 1615 | new_config.rx_trigger >> 8); |
| 1616 | serial_out(info, UART_ESI_CMD2, new_config.rx_trigger); |
| 1617 | serial_out(info, UART_ESI_CMD2, |
| 1618 | new_config.tx_trigger >> 8); |
| 1619 | serial_out(info, UART_ESI_CMD2, new_config.tx_trigger); |
| 1620 | spin_unlock_irqrestore(&info->lock, flags); |
| 1621 | } |
| 1622 | |
| 1623 | if (new_config.rx_timeout != info->config.rx_timeout) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | info->config.rx_timeout = new_config.rx_timeout; |
| 1625 | spin_lock_irqsave(&info->lock, flags); |
| 1626 | |
| 1627 | if (info->IER & UART_IER_RDI) { |
| 1628 | serial_out(info, UART_ESI_CMD1, |
| 1629 | ESI_SET_RX_TIMEOUT); |
| 1630 | serial_out(info, UART_ESI_CMD2, |
| 1631 | new_config.rx_timeout); |
| 1632 | } |
| 1633 | |
| 1634 | spin_unlock_irqrestore(&info->lock, flags); |
| 1635 | } |
| 1636 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1637 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | retval = startup(info); |
| 1639 | |
| 1640 | return retval; |
| 1641 | } |
| 1642 | |
| 1643 | /* |
| 1644 | * get_lsr_info - get line status register info |
| 1645 | * |
| 1646 | * Purpose: Let user call ioctl() to get info when the UART physically |
| 1647 | * is emptied. On bus types like RS485, the transmitter must |
| 1648 | * release the bus after transmitting. This must be done when |
| 1649 | * the transmit shift register is empty, not be done when the |
| 1650 | * transmit holding register is empty. This functionality |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1651 | * allows an RS485 driver to be written in user space. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1653 | static int get_lsr_info(struct esp_struct *info, unsigned int __user *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | { |
| 1655 | unsigned char status; |
| 1656 | unsigned int result; |
| 1657 | unsigned long flags; |
| 1658 | |
| 1659 | spin_lock_irqsave(&info->lock, flags); |
| 1660 | serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT); |
| 1661 | status = serial_in(info, UART_ESI_STAT1); |
| 1662 | spin_unlock_irqrestore(&info->lock, flags); |
| 1663 | result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1664 | return put_user(result, value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | } |
| 1666 | |
| 1667 | |
| 1668 | static int esp_tiocmget(struct tty_struct *tty, struct file *file) |
| 1669 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1670 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | unsigned char control, status; |
| 1672 | unsigned long flags; |
| 1673 | |
Harvey Harrison | bf9d892 | 2008-04-30 00:55:10 -0700 | [diff] [blame] | 1674 | if (serial_paranoia_check(info, tty->name, __func__)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | return -ENODEV; |
| 1676 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1677 | return -EIO; |
| 1678 | |
| 1679 | control = info->MCR; |
| 1680 | |
| 1681 | spin_lock_irqsave(&info->lock, flags); |
| 1682 | serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT); |
| 1683 | status = serial_in(info, UART_ESI_STAT2); |
| 1684 | spin_unlock_irqrestore(&info->lock, flags); |
| 1685 | |
| 1686 | return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
| 1687 | | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
| 1688 | | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
| 1689 | | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
| 1690 | | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
| 1691 | | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); |
| 1692 | } |
| 1693 | |
| 1694 | static int esp_tiocmset(struct tty_struct *tty, struct file *file, |
| 1695 | unsigned int set, unsigned int clear) |
| 1696 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1697 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | unsigned long flags; |
| 1699 | |
Harvey Harrison | bf9d892 | 2008-04-30 00:55:10 -0700 | [diff] [blame] | 1700 | if (serial_paranoia_check(info, tty->name, __func__)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | return -ENODEV; |
| 1702 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1703 | return -EIO; |
| 1704 | |
| 1705 | spin_lock_irqsave(&info->lock, flags); |
| 1706 | |
| 1707 | if (set & TIOCM_RTS) |
| 1708 | info->MCR |= UART_MCR_RTS; |
| 1709 | if (set & TIOCM_DTR) |
| 1710 | info->MCR |= UART_MCR_DTR; |
| 1711 | |
| 1712 | if (clear & TIOCM_RTS) |
| 1713 | info->MCR &= ~UART_MCR_RTS; |
| 1714 | if (clear & TIOCM_DTR) |
| 1715 | info->MCR &= ~UART_MCR_DTR; |
| 1716 | |
| 1717 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 1718 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 1719 | serial_out(info, UART_ESI_CMD2, info->MCR); |
| 1720 | |
| 1721 | spin_unlock_irqrestore(&info->lock, flags); |
| 1722 | return 0; |
| 1723 | } |
| 1724 | |
| 1725 | /* |
| 1726 | * rs_break() --- routine which turns the break handling on or off |
| 1727 | */ |
| 1728 | static void esp_break(struct tty_struct *tty, int break_state) |
| 1729 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1730 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | unsigned long flags; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | if (serial_paranoia_check(info, tty->name, "esp_break")) |
| 1734 | return; |
| 1735 | |
| 1736 | if (break_state == -1) { |
| 1737 | spin_lock_irqsave(&info->lock, flags); |
| 1738 | serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK); |
| 1739 | serial_out(info, UART_ESI_CMD2, 0x01); |
| 1740 | spin_unlock_irqrestore(&info->lock, flags); |
| 1741 | |
| 1742 | /* FIXME - new style wait needed here */ |
| 1743 | interruptible_sleep_on(&info->break_wait); |
| 1744 | } else { |
| 1745 | spin_lock_irqsave(&info->lock, flags); |
| 1746 | serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK); |
| 1747 | serial_out(info, UART_ESI_CMD2, 0x00); |
| 1748 | spin_unlock_irqrestore(&info->lock, flags); |
| 1749 | } |
| 1750 | } |
| 1751 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1752 | static int rs_ioctl(struct tty_struct *tty, struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | unsigned int cmd, unsigned long arg) |
| 1754 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1755 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | struct async_icount cprev, cnow; /* kernel counter temps */ |
| 1757 | struct serial_icounter_struct __user *p_cuser; /* user space */ |
| 1758 | void __user *argp = (void __user *)arg; |
| 1759 | unsigned long flags; |
Alan Cox | 5a4bc8c1 | 2008-04-30 00:53:18 -0700 | [diff] [blame] | 1760 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | |
| 1762 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) |
| 1763 | return -ENODEV; |
| 1764 | |
| 1765 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
| 1766 | (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) && |
| 1767 | (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT) && |
| 1768 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT) && |
| 1769 | (cmd != TIOCGHAYESESP) && (cmd != TIOCSHAYESESP)) { |
| 1770 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1771 | return -EIO; |
| 1772 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1773 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | switch (cmd) { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1775 | case TIOCGSERIAL: |
| 1776 | return get_serial_info(info, argp); |
| 1777 | case TIOCSSERIAL: |
| 1778 | lock_kernel(); |
| 1779 | ret = set_serial_info(info, argp); |
| 1780 | unlock_kernel(); |
| 1781 | return ret; |
| 1782 | case TIOCSERGWILD: |
| 1783 | return put_user(0L, (unsigned long __user *)argp); |
| 1784 | case TIOCSERGETLSR: /* Get line status register */ |
| 1785 | return get_lsr_info(info, argp); |
| 1786 | case TIOCSERSWILD: |
| 1787 | if (!capable(CAP_SYS_ADMIN)) |
| 1788 | return -EPERM; |
| 1789 | return 0; |
| 1790 | /* |
| 1791 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change |
| 1792 | * - mask passed in arg for lines of interest |
| 1793 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) |
| 1794 | * Caller should use TIOCGICOUNT to see which one it was |
| 1795 | */ |
| 1796 | case TIOCMIWAIT: |
| 1797 | spin_lock_irqsave(&info->lock, flags); |
| 1798 | cprev = info->icount; /* note the counters on entry */ |
| 1799 | spin_unlock_irqrestore(&info->lock, flags); |
| 1800 | while (1) { |
| 1801 | /* FIXME: convert to new style wakeup */ |
| 1802 | interruptible_sleep_on(&info->delta_msr_wait); |
| 1803 | /* see if a signal did it */ |
| 1804 | if (signal_pending(current)) |
| 1805 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | spin_lock_irqsave(&info->lock, flags); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1807 | cnow = info->icount; /* atomic copy */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1809 | if (cnow.rng == cprev.rng && |
| 1810 | cnow.dsr == cprev.dsr && |
| 1811 | cnow.dcd == cprev.dcd && |
| 1812 | cnow.cts == cprev.cts) |
| 1813 | return -EIO; /* no change => error */ |
| 1814 | if (((arg & TIOCM_RNG) && |
| 1815 | (cnow.rng != cprev.rng)) || |
| 1816 | ((arg & TIOCM_DSR) && |
| 1817 | (cnow.dsr != cprev.dsr)) || |
| 1818 | ((arg & TIOCM_CD) && |
| 1819 | (cnow.dcd != cprev.dcd)) || |
| 1820 | ((arg & TIOCM_CTS) && |
| 1821 | (cnow.cts != cprev.cts))) { |
| 1822 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1824 | cprev = cnow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1826 | /* NOTREACHED */ |
| 1827 | /* |
| 1828 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
| 1829 | * Return: write counters to the user passed counter struct |
| 1830 | * NB: both 1->0 and 0->1 transitions are counted except for |
| 1831 | * RI where only 0->1 is counted. |
| 1832 | */ |
| 1833 | case TIOCGICOUNT: |
| 1834 | spin_lock_irqsave(&info->lock, flags); |
| 1835 | cnow = info->icount; |
| 1836 | spin_unlock_irqrestore(&info->lock, flags); |
| 1837 | p_cuser = argp; |
| 1838 | if (put_user(cnow.cts, &p_cuser->cts) || |
| 1839 | put_user(cnow.dsr, &p_cuser->dsr) || |
| 1840 | put_user(cnow.rng, &p_cuser->rng) || |
| 1841 | put_user(cnow.dcd, &p_cuser->dcd)) |
| 1842 | return -EFAULT; |
| 1843 | return 0; |
| 1844 | case TIOCGHAYESESP: |
| 1845 | return get_esp_config(info, argp); |
| 1846 | case TIOCSHAYESESP: |
| 1847 | lock_kernel(); |
| 1848 | ret = set_esp_config(info, argp); |
| 1849 | unlock_kernel(); |
| 1850 | return ret; |
| 1851 | default: |
| 1852 | return -ENOIOCTLCMD; |
| 1853 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | return 0; |
| 1855 | } |
| 1856 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1857 | static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1859 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | unsigned long flags; |
| 1861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | change_speed(info); |
| 1863 | |
| 1864 | spin_lock_irqsave(&info->lock, flags); |
| 1865 | |
| 1866 | /* Handle transition to B0 status */ |
| 1867 | if ((old_termios->c_cflag & CBAUD) && |
| 1868 | !(tty->termios->c_cflag & CBAUD)) { |
| 1869 | info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS); |
| 1870 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 1871 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 1872 | serial_out(info, UART_ESI_CMD2, info->MCR); |
| 1873 | } |
| 1874 | |
| 1875 | /* Handle transition away from B0 status */ |
| 1876 | if (!(old_termios->c_cflag & CBAUD) && |
| 1877 | (tty->termios->c_cflag & CBAUD)) { |
| 1878 | info->MCR |= (UART_MCR_DTR | UART_MCR_RTS); |
| 1879 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 1880 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 1881 | serial_out(info, UART_ESI_CMD2, info->MCR); |
| 1882 | } |
| 1883 | |
| 1884 | spin_unlock_irqrestore(&info->lock, flags); |
| 1885 | |
| 1886 | /* Handle turning of CRTSCTS */ |
| 1887 | if ((old_termios->c_cflag & CRTSCTS) && |
| 1888 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 1889 | rs_start(tty); |
| 1890 | } |
| 1891 | } |
| 1892 | |
| 1893 | /* |
| 1894 | * ------------------------------------------------------------ |
| 1895 | * rs_close() |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1896 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | * This routine is called when the serial port gets closed. First, we |
| 1898 | * wait for the last remaining data to be sent. Then, we unlink its |
| 1899 | * async structure from the interrupt chain if necessary, and we free |
| 1900 | * that IRQ if nothing is left in the chain. |
| 1901 | * ------------------------------------------------------------ |
| 1902 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1903 | static void rs_close(struct tty_struct *tty, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1905 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | unsigned long flags; |
| 1907 | |
| 1908 | if (!info || serial_paranoia_check(info, tty->name, "rs_close")) |
| 1909 | return; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | spin_lock_irqsave(&info->lock, flags); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1912 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | if (tty_hung_up_p(filp)) { |
| 1914 | DBG_CNT("before DEC-hung"); |
| 1915 | goto out; |
| 1916 | } |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1919 | printk(KERN_DEBUG "rs_close ttys%d, count = %d\n", |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1920 | info->line, info->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | #endif |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1922 | if (tty->count == 1 && info->port.count != 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | /* |
| 1924 | * Uh, oh. tty->count is 1, which means that the tty |
| 1925 | * structure will be freed. Info->count should always |
| 1926 | * be one in these conditions. If it's greater than |
| 1927 | * one, we've got real problems, since it means the |
| 1928 | * serial port won't be shutdown. |
| 1929 | */ |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1930 | printk(KERN_DEBUG "rs_close: bad serial port count; tty->count is 1, info->port.count is %d\n", info->port.count); |
| 1931 | info->port.count = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | } |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1933 | if (--info->port.count < 0) { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1934 | printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n", |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1935 | info->line, info->port.count); |
| 1936 | info->port.count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | } |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1938 | if (info->port.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | DBG_CNT("before DEC-2"); |
| 1940 | goto out; |
| 1941 | } |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1942 | info->port.flags |= ASYNC_CLOSING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | |
| 1944 | spin_unlock_irqrestore(&info->lock, flags); |
| 1945 | /* |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1946 | * Now we wait for the transmit buffer to clear; and we notify |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | * the line discipline to only process XON/XOFF characters. |
| 1948 | */ |
| 1949 | tty->closing = 1; |
| 1950 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| 1951 | tty_wait_until_sent(tty, info->closing_wait); |
| 1952 | /* |
| 1953 | * At this point we stop accepting input. To do this, we |
| 1954 | * disable the receive line status interrupts, and tell the |
| 1955 | * interrupt driver to stop checking the data ready bit in the |
| 1956 | * line status register. |
| 1957 | */ |
| 1958 | /* info->IER &= ~UART_IER_RLSI; */ |
| 1959 | info->IER &= ~UART_IER_RDI; |
| 1960 | info->read_status_mask &= ~UART_LSR_DR; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1961 | if (info->port.flags & ASYNC_INITIALIZED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | |
| 1963 | spin_lock_irqsave(&info->lock, flags); |
| 1964 | serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK); |
| 1965 | serial_out(info, UART_ESI_CMD2, info->IER); |
| 1966 | |
| 1967 | /* disable receive timeout */ |
| 1968 | serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT); |
| 1969 | serial_out(info, UART_ESI_CMD2, 0x00); |
| 1970 | |
| 1971 | spin_unlock_irqrestore(&info->lock, flags); |
| 1972 | |
| 1973 | /* |
| 1974 | * Before we drop DTR, make sure the UART transmitter |
| 1975 | * has completely drained; this is especially |
| 1976 | * important if there is a transmit FIFO! |
| 1977 | */ |
| 1978 | rs_wait_until_sent(tty, info->timeout); |
| 1979 | } |
| 1980 | shutdown(info); |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 1981 | rs_flush_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | tty_ldisc_flush(tty); |
| 1983 | tty->closing = 0; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1984 | info->port.tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1986 | if (info->port.blocked_open) { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 1987 | if (info->close_delay) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1989 | wake_up_interruptible(&info->port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | } |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 1991 | info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1992 | wake_up_interruptible(&info->port.close_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | return; |
| 1994 | |
| 1995 | out: |
| 1996 | spin_unlock_irqrestore(&info->lock, flags); |
| 1997 | } |
| 1998 | |
| 1999 | static void rs_wait_until_sent(struct tty_struct *tty, int timeout) |
| 2000 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2001 | struct esp_struct *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | unsigned long orig_jiffies, char_time; |
| 2003 | unsigned long flags; |
| 2004 | |
| 2005 | if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent")) |
| 2006 | return; |
| 2007 | |
| 2008 | orig_jiffies = jiffies; |
| 2009 | char_time = ((info->timeout - HZ / 50) / 1024) / 5; |
| 2010 | |
| 2011 | if (!char_time) |
| 2012 | char_time = 1; |
| 2013 | |
| 2014 | spin_lock_irqsave(&info->lock, flags); |
| 2015 | serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND); |
| 2016 | serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL); |
| 2017 | |
| 2018 | while ((serial_in(info, UART_ESI_STAT1) != 0x03) || |
| 2019 | (serial_in(info, UART_ESI_STAT2) != 0xff)) { |
| 2020 | |
| 2021 | spin_unlock_irqrestore(&info->lock, flags); |
| 2022 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 2023 | |
| 2024 | if (signal_pending(current)) |
Harvey Harrison | d3ceb65 | 2008-04-30 00:53:50 -0700 | [diff] [blame] | 2025 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | |
| 2027 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
Harvey Harrison | d3ceb65 | 2008-04-30 00:53:50 -0700 | [diff] [blame] | 2028 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | |
| 2030 | spin_lock_irqsave(&info->lock, flags); |
| 2031 | serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND); |
| 2032 | serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL); |
| 2033 | } |
| 2034 | spin_unlock_irqrestore(&info->lock, flags); |
| 2035 | set_current_state(TASK_RUNNING); |
| 2036 | } |
| 2037 | |
| 2038 | /* |
| 2039 | * esp_hangup() --- called by tty_hangup() when a hangup is signaled. |
| 2040 | */ |
| 2041 | static void esp_hangup(struct tty_struct *tty) |
| 2042 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2043 | struct esp_struct *info = tty->driver_data; |
| 2044 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | if (serial_paranoia_check(info, tty->name, "esp_hangup")) |
| 2046 | return; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2047 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | rs_flush_buffer(tty); |
| 2049 | shutdown(info); |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2050 | info->port.count = 0; |
| 2051 | info->port.flags &= ~ASYNC_NORMAL_ACTIVE; |
| 2052 | info->port.tty = NULL; |
| 2053 | wake_up_interruptible(&info->port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | } |
| 2055 | |
| 2056 | /* |
| 2057 | * ------------------------------------------------------------ |
| 2058 | * esp_open() and friends |
| 2059 | * ------------------------------------------------------------ |
| 2060 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2061 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2062 | struct esp_struct *info) |
| 2063 | { |
| 2064 | DECLARE_WAITQUEUE(wait, current); |
| 2065 | int retval; |
| 2066 | int do_clocal = 0; |
| 2067 | unsigned long flags; |
| 2068 | |
| 2069 | /* |
| 2070 | * If the device is in the middle of being closed, then block |
| 2071 | * until it's done, and then try again. |
| 2072 | */ |
| 2073 | if (tty_hung_up_p(filp) || |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2074 | (info->port.flags & ASYNC_CLOSING)) { |
| 2075 | if (info->port.flags & ASYNC_CLOSING) |
| 2076 | interruptible_sleep_on(&info->port.close_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | #ifdef SERIAL_DO_RESTART |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2078 | if (info->port.flags & ASYNC_HUP_NOTIFY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | return -EAGAIN; |
| 2080 | else |
| 2081 | return -ERESTARTSYS; |
| 2082 | #else |
| 2083 | return -EAGAIN; |
| 2084 | #endif |
| 2085 | } |
| 2086 | |
| 2087 | /* |
| 2088 | * If non-blocking mode is set, or the port is not enabled, |
| 2089 | * then make the check up front and then exit. |
| 2090 | */ |
| 2091 | if ((filp->f_flags & O_NONBLOCK) || |
| 2092 | (tty->flags & (1 << TTY_IO_ERROR))) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2093 | info->port.flags |= ASYNC_NORMAL_ACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | return 0; |
| 2095 | } |
| 2096 | |
| 2097 | if (tty->termios->c_cflag & CLOCAL) |
| 2098 | do_clocal = 1; |
| 2099 | |
| 2100 | /* |
| 2101 | * Block waiting for the carrier detect and the line to become |
| 2102 | * free (i.e., not in use by the callout). While we are in |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2103 | * this loop, info->port.count is dropped by one, so that |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | * rs_close() knows when to free things. We restore it upon |
| 2105 | * exit, either normal or abnormal. |
| 2106 | */ |
| 2107 | retval = 0; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2108 | add_wait_queue(&info->port.open_wait, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2110 | printk(KERN_DEBUG "block_til_ready before block: ttys%d, count = %d\n", |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2111 | info->line, info->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | #endif |
| 2113 | spin_lock_irqsave(&info->lock, flags); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2114 | if (!tty_hung_up_p(filp)) |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2115 | info->port.count--; |
| 2116 | info->port.blocked_open++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | while (1) { |
| 2118 | if ((tty->termios->c_cflag & CBAUD)) { |
| 2119 | unsigned int scratch; |
| 2120 | |
| 2121 | serial_out(info, UART_ESI_CMD1, ESI_READ_UART); |
| 2122 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 2123 | scratch = serial_in(info, UART_ESI_STAT1); |
| 2124 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 2125 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 2126 | serial_out(info, UART_ESI_CMD2, |
| 2127 | scratch | UART_MCR_DTR | UART_MCR_RTS); |
| 2128 | } |
| 2129 | set_current_state(TASK_INTERRUPTIBLE); |
| 2130 | if (tty_hung_up_p(filp) || |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2131 | !(info->port.flags & ASYNC_INITIALIZED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | #ifdef SERIAL_DO_RESTART |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2133 | if (info->port.flags & ASYNC_HUP_NOTIFY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | retval = -EAGAIN; |
| 2135 | else |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2136 | retval = -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | #else |
| 2138 | retval = -EAGAIN; |
| 2139 | #endif |
| 2140 | break; |
| 2141 | } |
| 2142 | |
| 2143 | serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT); |
| 2144 | if (serial_in(info, UART_ESI_STAT2) & UART_MSR_DCD) |
| 2145 | do_clocal = 1; |
| 2146 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2147 | if (!(info->port.flags & ASYNC_CLOSING) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | (do_clocal)) |
| 2149 | break; |
| 2150 | if (signal_pending(current)) { |
| 2151 | retval = -ERESTARTSYS; |
| 2152 | break; |
| 2153 | } |
| 2154 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2155 | printk(KERN_DEBUG "block_til_ready blocking: ttys%d, count = %d\n", |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2156 | info->line, info->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | #endif |
| 2158 | spin_unlock_irqrestore(&info->lock, flags); |
| 2159 | schedule(); |
| 2160 | spin_lock_irqsave(&info->lock, flags); |
| 2161 | } |
| 2162 | set_current_state(TASK_RUNNING); |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2163 | remove_wait_queue(&info->port.open_wait, &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | if (!tty_hung_up_p(filp)) |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2165 | info->port.count++; |
| 2166 | info->port.blocked_open--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | spin_unlock_irqrestore(&info->lock, flags); |
| 2168 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2169 | printk(KERN_DEBUG "block_til_ready after blocking: ttys%d, count = %d\n", |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2170 | info->line, info->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | #endif |
| 2172 | if (retval) |
| 2173 | return retval; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2174 | info->port.flags |= ASYNC_NORMAL_ACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | return 0; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | |
| 2178 | /* |
| 2179 | * This routine is called whenever a serial port is opened. It |
| 2180 | * enables interrupts for a serial port, linking in its async structure into |
| 2181 | * the IRQ chain. It also performs the serial-specific |
| 2182 | * initialization for the tty structure. |
| 2183 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2184 | static int esp_open(struct tty_struct *tty, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | { |
| 2186 | struct esp_struct *info; |
| 2187 | int retval, line; |
| 2188 | unsigned long flags; |
| 2189 | |
| 2190 | line = tty->index; |
| 2191 | if ((line < 0) || (line >= NR_PORTS)) |
| 2192 | return -ENODEV; |
| 2193 | |
| 2194 | /* find the port in the chain */ |
| 2195 | |
| 2196 | info = ports; |
| 2197 | |
| 2198 | while (info && (info->line != line)) |
| 2199 | info = info->next_port; |
| 2200 | |
| 2201 | if (!info) { |
| 2202 | serial_paranoia_check(info, tty->name, "esp_open"); |
| 2203 | return -ENODEV; |
| 2204 | } |
| 2205 | |
| 2206 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2207 | printk(KERN_DEBUG "esp_open %s, count = %d\n", tty->name, info->port.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | #endif |
| 2209 | spin_lock_irqsave(&info->lock, flags); |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2210 | info->port.count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | tty->driver_data = info; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2212 | info->port.tty = tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | |
Alan Cox | 5552c28 | 2006-02-14 17:50:54 +0000 | [diff] [blame] | 2214 | spin_unlock_irqrestore(&info->lock, flags); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | /* |
| 2217 | * Start up serial port |
| 2218 | */ |
| 2219 | retval = startup(info); |
| 2220 | if (retval) |
| 2221 | return retval; |
| 2222 | |
| 2223 | retval = block_til_ready(tty, filp, info); |
| 2224 | if (retval) { |
| 2225 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2226 | printk(KERN_DEBUG "esp_open returning after block_til_ready with %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | retval); |
| 2228 | #endif |
| 2229 | return retval; |
| 2230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | #ifdef SERIAL_DEBUG_OPEN |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2232 | printk(KERN_DEBUG "esp_open %s successful...", tty->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | #endif |
| 2234 | return 0; |
| 2235 | } |
| 2236 | |
| 2237 | /* |
| 2238 | * --------------------------------------------------------------------- |
| 2239 | * espserial_init() and friends |
| 2240 | * |
| 2241 | * espserial_init() is called at boot-time to initialize the serial driver. |
| 2242 | * --------------------------------------------------------------------- |
| 2243 | */ |
| 2244 | |
| 2245 | /* |
| 2246 | * This routine prints out the appropriate serial driver version |
| 2247 | * number, and identifies which options were configured into this |
| 2248 | * driver. |
| 2249 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2250 | |
| 2251 | static void show_serial_version(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | { |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2253 | printk(KERN_INFO "%s version %s (DMA %u)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | serial_name, serial_version, dma); |
| 2255 | } |
| 2256 | |
| 2257 | /* |
| 2258 | * This routine is called by espserial_init() to initialize a specific serial |
| 2259 | * port. |
| 2260 | */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2261 | static int autoconfig(struct esp_struct *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | { |
| 2263 | int port_detected = 0; |
| 2264 | unsigned long flags; |
| 2265 | |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2266 | if (!request_region(info->io_port, REGION_SIZE, "esp serial")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | return -EIO; |
| 2268 | |
| 2269 | spin_lock_irqsave(&info->lock, flags); |
| 2270 | /* |
| 2271 | * Check for ESP card |
| 2272 | */ |
| 2273 | |
| 2274 | if (serial_in(info, UART_ESI_BASE) == 0xf3) { |
| 2275 | serial_out(info, UART_ESI_CMD1, 0x00); |
| 2276 | serial_out(info, UART_ESI_CMD1, 0x01); |
| 2277 | |
| 2278 | if ((serial_in(info, UART_ESI_STAT2) & 0x70) == 0x20) { |
| 2279 | port_detected = 1; |
| 2280 | |
| 2281 | if (!(info->irq)) { |
| 2282 | serial_out(info, UART_ESI_CMD1, 0x02); |
| 2283 | |
| 2284 | if (serial_in(info, UART_ESI_STAT1) & 0x01) |
| 2285 | info->irq = 3; |
| 2286 | else |
| 2287 | info->irq = 4; |
| 2288 | } |
| 2289 | |
| 2290 | |
| 2291 | /* put card in enhanced mode */ |
| 2292 | /* this prevents access through */ |
| 2293 | /* the "old" IO ports */ |
| 2294 | esp_basic_init(info); |
| 2295 | |
| 2296 | /* clear out MCR */ |
| 2297 | serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART); |
| 2298 | serial_out(info, UART_ESI_CMD2, UART_MCR); |
| 2299 | serial_out(info, UART_ESI_CMD2, 0x00); |
| 2300 | } |
| 2301 | } |
| 2302 | if (!port_detected) |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2303 | release_region(info->io_port, REGION_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | |
| 2305 | spin_unlock_irqrestore(&info->lock, flags); |
| 2306 | return (port_detected); |
| 2307 | } |
| 2308 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2309 | static const struct tty_operations esp_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | .open = esp_open, |
| 2311 | .close = rs_close, |
| 2312 | .write = rs_write, |
| 2313 | .put_char = rs_put_char, |
| 2314 | .flush_chars = rs_flush_chars, |
| 2315 | .write_room = rs_write_room, |
| 2316 | .chars_in_buffer = rs_chars_in_buffer, |
| 2317 | .flush_buffer = rs_flush_buffer, |
| 2318 | .ioctl = rs_ioctl, |
| 2319 | .throttle = rs_throttle, |
| 2320 | .unthrottle = rs_unthrottle, |
| 2321 | .set_termios = rs_set_termios, |
| 2322 | .stop = rs_stop, |
| 2323 | .start = rs_start, |
| 2324 | .hangup = esp_hangup, |
| 2325 | .break_ctl = esp_break, |
| 2326 | .wait_until_sent = rs_wait_until_sent, |
| 2327 | .tiocmget = esp_tiocmget, |
| 2328 | .tiocmset = esp_tiocmset, |
| 2329 | }; |
| 2330 | |
| 2331 | /* |
| 2332 | * The serial driver boot-time initialization code! |
| 2333 | */ |
| 2334 | static int __init espserial_init(void) |
| 2335 | { |
| 2336 | int i, offset; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2337 | struct esp_struct *info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | struct esp_struct *last_primary = NULL; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2339 | int esp[] = { 0x100, 0x140, 0x180, 0x200, 0x240, 0x280, 0x300, 0x380 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | |
| 2341 | esp_driver = alloc_tty_driver(NR_PORTS); |
| 2342 | if (!esp_driver) |
| 2343 | return -ENOMEM; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | for (i = 0; i < NR_PRIMARY; i++) { |
| 2346 | if (irq[i] != 0) { |
| 2347 | if ((irq[i] < 2) || (irq[i] > 15) || (irq[i] == 6) || |
| 2348 | (irq[i] == 8) || (irq[i] == 13)) |
| 2349 | irq[i] = 0; |
| 2350 | else if (irq[i] == 2) |
| 2351 | irq[i] = 9; |
| 2352 | } |
| 2353 | } |
| 2354 | |
| 2355 | if ((dma != 1) && (dma != 3)) |
| 2356 | dma = 0; |
| 2357 | |
| 2358 | if ((rx_trigger < 1) || (rx_trigger > 1023)) |
| 2359 | rx_trigger = 768; |
| 2360 | |
| 2361 | if ((tx_trigger < 1) || (tx_trigger > 1023)) |
| 2362 | tx_trigger = 768; |
| 2363 | |
| 2364 | if ((flow_off < 1) || (flow_off > 1023)) |
| 2365 | flow_off = 1016; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | if ((flow_on < 1) || (flow_on > 1023)) |
| 2368 | flow_on = 944; |
| 2369 | |
| 2370 | if ((rx_timeout < 0) || (rx_timeout > 255)) |
| 2371 | rx_timeout = 128; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | if (flow_on >= flow_off) |
| 2374 | flow_on = flow_off - 1; |
| 2375 | |
| 2376 | show_serial_version(); |
| 2377 | |
| 2378 | /* Initialize the tty_driver structure */ |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | esp_driver->owner = THIS_MODULE; |
| 2381 | esp_driver->name = "ttyP"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | esp_driver->major = ESP_IN_MAJOR; |
| 2383 | esp_driver->minor_start = 0; |
| 2384 | esp_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2385 | esp_driver->subtype = SERIAL_TYPE_NORMAL; |
| 2386 | esp_driver->init_termios = tty_std_termios; |
| 2387 | esp_driver->init_termios.c_cflag = |
| 2388 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2389 | esp_driver->init_termios.c_ispeed = 9600; |
| 2390 | esp_driver->init_termios.c_ospeed = 9600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | esp_driver->flags = TTY_DRIVER_REAL_RAW; |
| 2392 | tty_set_operations(esp_driver, &esp_ops); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2393 | if (tty_register_driver(esp_driver)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | printk(KERN_ERR "Couldn't register esp serial driver"); |
| 2395 | put_tty_driver(esp_driver); |
| 2396 | return 1; |
| 2397 | } |
| 2398 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 2399 | info = kzalloc(sizeof(struct esp_struct), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2400 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2401 | if (!info) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2402 | printk(KERN_ERR "Couldn't allocate memory for esp serial device information\n"); |
| 2403 | tty_unregister_driver(esp_driver); |
| 2404 | put_tty_driver(esp_driver); |
| 2405 | return 1; |
| 2406 | } |
| 2407 | |
Ingo Molnar | 8f56a31 | 2006-01-16 22:14:00 -0800 | [diff] [blame] | 2408 | spin_lock_init(&info->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | /* rx_trigger, tx_trigger are needed by autoconfig */ |
| 2410 | info->config.rx_trigger = rx_trigger; |
| 2411 | info->config.tx_trigger = tx_trigger; |
| 2412 | |
| 2413 | i = 0; |
| 2414 | offset = 0; |
| 2415 | |
| 2416 | do { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2417 | info->io_port = esp[i] + offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | info->irq = irq[i]; |
| 2419 | info->line = (i * 8) + (offset / 8); |
| 2420 | |
| 2421 | if (!autoconfig(info)) { |
| 2422 | i++; |
| 2423 | offset = 0; |
| 2424 | continue; |
| 2425 | } |
| 2426 | |
| 2427 | info->custom_divisor = (divisor[i] >> (offset / 2)) & 0xf; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2428 | info->port.flags = STD_COM_FLAGS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | if (info->custom_divisor) |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2430 | info->port.flags |= ASYNC_SPD_CUST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | info->magic = ESP_MAGIC; |
| 2432 | info->close_delay = 5*HZ/10; |
| 2433 | info->closing_wait = 30*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | info->config.rx_timeout = rx_timeout; |
| 2435 | info->config.flow_on = flow_on; |
| 2436 | info->config.flow_off = flow_off; |
| 2437 | info->config.pio_threshold = pio_threshold; |
| 2438 | info->next_port = ports; |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2439 | init_waitqueue_head(&info->port.open_wait); |
| 2440 | init_waitqueue_head(&info->port.close_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | init_waitqueue_head(&info->delta_msr_wait); |
| 2442 | init_waitqueue_head(&info->break_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2443 | ports = info; |
| 2444 | printk(KERN_INFO "ttyP%d at 0x%04x (irq = %d) is an ESP ", |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2445 | info->line, info->io_port, info->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | |
| 2447 | if (info->line % 8) { |
| 2448 | printk("secondary port\n"); |
| 2449 | /* 8 port cards can't do DMA */ |
| 2450 | info->stat_flags |= ESP_STAT_NEVER_DMA; |
| 2451 | |
| 2452 | if (last_primary) |
| 2453 | last_primary->stat_flags |= ESP_STAT_NEVER_DMA; |
| 2454 | } else { |
| 2455 | printk("primary port\n"); |
| 2456 | last_primary = info; |
| 2457 | irq[i] = info->irq; |
| 2458 | } |
| 2459 | |
| 2460 | if (!dma) |
| 2461 | info->stat_flags |= ESP_STAT_NEVER_DMA; |
| 2462 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 2463 | info = kzalloc(sizeof(struct esp_struct), GFP_KERNEL); |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2464 | if (!info) { |
| 2465 | printk(KERN_ERR "Couldn't allocate memory for esp serial device information\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | /* allow use of the already detected ports */ |
| 2467 | return 0; |
| 2468 | } |
| 2469 | |
Ingo Molnar | 80d38f9 | 2008-03-07 10:47:43 +0100 | [diff] [blame] | 2470 | spin_lock_init(&info->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | /* rx_trigger, tx_trigger are needed by autoconfig */ |
| 2472 | info->config.rx_trigger = rx_trigger; |
| 2473 | info->config.tx_trigger = tx_trigger; |
| 2474 | |
| 2475 | if (offset == 56) { |
| 2476 | i++; |
| 2477 | offset = 0; |
| 2478 | } else { |
| 2479 | offset += 8; |
| 2480 | } |
| 2481 | } while (i < NR_PRIMARY); |
| 2482 | |
| 2483 | /* free the last port memory allocation */ |
| 2484 | kfree(info); |
| 2485 | |
| 2486 | return 0; |
| 2487 | } |
| 2488 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2489 | static void __exit espserial_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | { |
| 2491 | int e1; |
| 2492 | struct esp_struct *temp_async; |
| 2493 | struct esp_pio_buffer *pio_buf; |
| 2494 | |
Alan Cox | fb100b6 | 2008-04-30 00:54:16 -0700 | [diff] [blame] | 2495 | e1 = tty_unregister_driver(esp_driver); |
| 2496 | if (e1) |
| 2497 | printk(KERN_ERR "esp: failed to unregister driver (%d)\n", e1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | put_tty_driver(esp_driver); |
| 2499 | |
| 2500 | while (ports) { |
Alan Cox | 4982d6b | 2008-07-16 21:55:11 +0100 | [diff] [blame] | 2501 | if (ports->io_port) |
| 2502 | release_region(ports->io_port, REGION_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | temp_async = ports->next_port; |
| 2504 | kfree(ports); |
| 2505 | ports = temp_async; |
| 2506 | } |
| 2507 | |
| 2508 | if (dma_buffer) |
| 2509 | free_pages((unsigned long)dma_buffer, |
| 2510 | get_order(DMA_BUFFER_SZ)); |
| 2511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | while (free_pio_buf) { |
| 2513 | pio_buf = free_pio_buf->next; |
| 2514 | kfree(free_pio_buf); |
| 2515 | free_pio_buf = pio_buf; |
| 2516 | } |
| 2517 | } |
| 2518 | |
| 2519 | module_init(espserial_init); |
| 2520 | module_exit(espserial_exit); |