Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #define AUTOSENSE |
| 2 | /* #define PSEUDO_DMA */ |
| 3 | |
| 4 | /* |
| 5 | * EcoSCSI Generic NCR5380 driver |
| 6 | * |
| 7 | * Copyright 1995, Russell King |
| 8 | * |
| 9 | * ALPHA RELEASE 1. |
| 10 | * |
| 11 | * For more information, please consult |
| 12 | * |
| 13 | * NCR 5380 Family |
| 14 | * SCSI Protocol Controller |
| 15 | * Databook |
| 16 | * |
| 17 | * NCR Microelectronics |
| 18 | * 1635 Aeroplaza Drive |
| 19 | * Colorado Springs, CO 80916 |
| 20 | * 1+ (719) 578-3400 |
| 21 | * 1+ (800) 334-5454 |
| 22 | */ |
| 23 | |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/signal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/ioport.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/blkdev.h> |
| 30 | |
| 31 | #include <asm/io.h> |
| 32 | #include <asm/system.h> |
| 33 | |
| 34 | #include "../scsi.h" |
| 35 | #include <scsi/scsi_host.h> |
| 36 | |
| 37 | #define NCR5380_implementation_fields int port, ctrl |
| 38 | #define NCR5380_local_declare() struct Scsi_Host *_instance |
| 39 | #define NCR5380_setup(instance) _instance = instance |
| 40 | |
| 41 | #define NCR5380_read(reg) ecoscsi_read(_instance, reg) |
| 42 | #define NCR5380_write(reg, value) ecoscsi_write(_instance, reg, value) |
| 43 | |
| 44 | #define NCR5380_intr ecoscsi_intr |
| 45 | #define NCR5380_queue_command ecoscsi_queue_command |
| 46 | #define NCR5380_proc_info ecoscsi_proc_info |
| 47 | |
| 48 | #include "../NCR5380.h" |
| 49 | |
| 50 | #define ECOSCSI_PUBLIC_RELEASE 1 |
| 51 | |
| 52 | static char ecoscsi_read(struct Scsi_Host *instance, int reg) |
| 53 | { |
| 54 | int iobase = instance->io_port; |
| 55 | outb(reg | 8, iobase); |
| 56 | return inb(iobase + 1); |
| 57 | } |
| 58 | |
| 59 | static void ecoscsi_write(struct Scsi_Host *instance, int reg, int value) |
| 60 | { |
| 61 | int iobase = instance->io_port; |
| 62 | outb(reg | 8, iobase); |
| 63 | outb(value, iobase + 1); |
| 64 | } |
| 65 | |
| 66 | /* |
| 67 | * Function : ecoscsi_setup(char *str, int *ints) |
| 68 | * |
| 69 | * Purpose : LILO command line initialization of the overrides array, |
| 70 | * |
| 71 | * Inputs : str - unused, ints - array of integer parameters with ints[0] |
| 72 | * equal to the number of ints. |
| 73 | * |
| 74 | */ |
| 75 | |
| 76 | void ecoscsi_setup(char *str, int *ints) |
| 77 | { |
| 78 | } |
| 79 | |
| 80 | const char * ecoscsi_info (struct Scsi_Host *spnt) |
| 81 | { |
| 82 | return ""; |
| 83 | } |
| 84 | |
| 85 | #if 0 |
| 86 | #define STAT(p) inw(p + 144) |
| 87 | |
| 88 | static inline int NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr, |
| 89 | int len) |
| 90 | { |
| 91 | int iobase = host->io_port; |
| 92 | printk("writing %p len %d\n",addr, len); |
| 93 | if(!len) return -1; |
| 94 | |
| 95 | while(1) |
| 96 | { |
| 97 | int status; |
| 98 | while(((status = STAT(iobase)) & 0x100)==0); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | static inline int NCR5380_pread(struct Scsi_Host *host, unsigned char *addr, |
| 103 | int len) |
| 104 | { |
| 105 | int iobase = host->io_port; |
| 106 | int iobase2= host->io_port + 0x100; |
| 107 | unsigned char *start = addr; |
| 108 | int s; |
| 109 | printk("reading %p len %d\n",addr, len); |
| 110 | outb(inb(iobase + 128), iobase + 135); |
| 111 | while(len > 0) |
| 112 | { |
| 113 | int status,b,i, timeout; |
| 114 | timeout = 0x07FFFFFF; |
| 115 | while(((status = STAT(iobase)) & 0x100)==0) |
| 116 | { |
| 117 | timeout--; |
| 118 | if(status & 0x200 || !timeout) |
| 119 | { |
| 120 | printk("status = %p\n",status); |
| 121 | outb(0, iobase + 135); |
| 122 | return 1; |
| 123 | } |
| 124 | } |
| 125 | if(len >= 128) |
| 126 | { |
| 127 | for(i=0; i<64; i++) |
| 128 | { |
| 129 | b = inw(iobase + 136); |
| 130 | *addr++ = b; |
| 131 | *addr++ = b>>8; |
| 132 | } |
| 133 | len -= 128; |
| 134 | } |
| 135 | else |
| 136 | { |
| 137 | b = inw(iobase + 136); |
| 138 | *addr ++ = b; |
| 139 | len -= 1; |
| 140 | if(len) |
| 141 | *addr ++ = b>>8; |
| 142 | len -= 1; |
| 143 | } |
| 144 | } |
| 145 | outb(0, iobase + 135); |
| 146 | printk("first bytes = %02X %02X %02X %20X %02X %02X %02X\n",*start, start[1], start[2], start[3], start[4], start[5], start[6]); |
| 147 | return 1; |
| 148 | } |
| 149 | #endif |
| 150 | #undef STAT |
| 151 | |
| 152 | #define BOARD_NORMAL 0 |
| 153 | #define BOARD_NCR53C400 1 |
| 154 | |
| 155 | #include "../NCR5380.c" |
| 156 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 157 | static struct scsi_host_template ecoscsi_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | .module = THIS_MODULE, |
| 159 | .name = "Serial Port EcoSCSI NCR5380", |
| 160 | .proc_name = "ecoscsi", |
| 161 | .info = ecoscsi_info, |
| 162 | .queuecommand = ecoscsi_queue_command, |
| 163 | .eh_abort_handler = NCR5380_abort, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | .eh_bus_reset_handler = NCR5380_bus_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | .can_queue = 16, |
| 166 | .this_id = 7, |
| 167 | .sg_tablesize = SG_ALL, |
| 168 | .cmd_per_lun = 2, |
| 169 | .use_clustering = DISABLE_CLUSTERING |
| 170 | }; |
| 171 | |
| 172 | static struct Scsi_Host *host; |
| 173 | |
| 174 | static int __init ecoscsi_init(void) |
| 175 | { |
| 176 | |
| 177 | host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata)); |
| 178 | if (!host) |
| 179 | return 0; |
| 180 | |
| 181 | host->io_port = 0x80ce8000; |
| 182 | host->n_io_port = 144; |
| 183 | host->irq = IRQ_NONE; |
| 184 | |
| 185 | if (!(request_region(host->io_port, host->n_io_port, "ecoscsi")) ) |
| 186 | goto unregister_scsi; |
| 187 | |
| 188 | ecoscsi_write(host, MODE_REG, 0x20); /* Is it really SCSI? */ |
| 189 | if (ecoscsi_read(host, MODE_REG) != 0x20) /* Write to a reg. */ |
| 190 | goto release_reg; |
| 191 | |
| 192 | ecoscsi_write(host, MODE_REG, 0x00 ); /* it back. */ |
| 193 | if (ecoscsi_read(host, MODE_REG) != 0x00) |
| 194 | goto release_reg; |
| 195 | |
| 196 | NCR5380_init(host, 0); |
| 197 | |
| 198 | printk("scsi%d: at port 0x%08lx irqs disabled", host->host_no, host->io_port); |
| 199 | printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", |
| 200 | host->can_queue, host->cmd_per_lun, ECOSCSI_PUBLIC_RELEASE); |
| 201 | printk("\nscsi%d:", host->host_no); |
| 202 | NCR5380_print_options(host); |
| 203 | printk("\n"); |
| 204 | |
| 205 | scsi_add_host(host, NULL); /* XXX handle failure */ |
| 206 | scsi_scan_host(host); |
| 207 | return 0; |
| 208 | |
| 209 | release_reg: |
| 210 | release_region(host->io_port, host->n_io_port); |
| 211 | unregister_scsi: |
| 212 | scsi_host_put(host); |
| 213 | return -ENODEV; |
| 214 | } |
| 215 | |
| 216 | static void __exit ecoscsi_exit(void) |
| 217 | { |
| 218 | scsi_remove_host(host); |
| 219 | |
| 220 | if (shpnt->irq != IRQ_NONE) |
| 221 | free_irq(shpnt->irq, NULL); |
| 222 | NCR5380_exit(host); |
| 223 | if (shpnt->io_port) |
| 224 | release_region(shpnt->io_port, shpnt->n_io_port); |
| 225 | |
| 226 | scsi_host_put(host); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | module_init(ecoscsi_init); |
| 231 | module_exit(ecoscsi_exit); |
| 232 | |
| 233 | MODULE_AUTHOR("Russell King"); |
| 234 | MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines"); |
| 235 | MODULE_LICENSE("GPL"); |
| 236 | |