Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/pcmcia/pxa2xx_lubbock.c |
| 3 | * |
| 4 | * Author: George Davis |
| 5 | * Created: Jan 10, 2002 |
| 6 | * Copyright: MontaVista Software Inc. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c |
| 13 | * |
| 14 | * Lubbock PCMCIA specific routines. |
| 15 | * |
| 16 | */ |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/device.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/delay.h> |
| 24 | |
| 25 | #include <asm/hardware.h> |
| 26 | #include <asm/hardware/sa1111.h> |
| 27 | #include <asm/mach-types.h> |
| 28 | #include <asm/arch/pxa-regs.h> |
| 29 | #include <asm/arch/lubbock.h> |
| 30 | |
| 31 | #include "sa1111_generic.h" |
| 32 | |
| 33 | static int |
| 34 | lubbock_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 35 | { |
| 36 | /* |
| 37 | * Setup default state of GPIO outputs |
| 38 | * before we enable them as outputs. |
| 39 | */ |
| 40 | GPSR(GPIO48_nPOE) = |
| 41 | GPIO_bit(GPIO48_nPOE) | |
| 42 | GPIO_bit(GPIO49_nPWE) | |
| 43 | GPIO_bit(GPIO50_nPIOR) | |
| 44 | GPIO_bit(GPIO51_nPIOW) | |
| 45 | GPIO_bit(GPIO52_nPCE_1) | |
| 46 | GPIO_bit(GPIO53_nPCE_2); |
| 47 | |
| 48 | pxa_gpio_mode(GPIO48_nPOE_MD); |
| 49 | pxa_gpio_mode(GPIO49_nPWE_MD); |
| 50 | pxa_gpio_mode(GPIO50_nPIOR_MD); |
| 51 | pxa_gpio_mode(GPIO51_nPIOW_MD); |
| 52 | pxa_gpio_mode(GPIO52_nPCE_1_MD); |
| 53 | pxa_gpio_mode(GPIO53_nPCE_2_MD); |
| 54 | pxa_gpio_mode(GPIO54_pSKTSEL_MD); |
| 55 | pxa_gpio_mode(GPIO55_nPREG_MD); |
| 56 | pxa_gpio_mode(GPIO56_nPWAIT_MD); |
| 57 | pxa_gpio_mode(GPIO57_nIOIS16_MD); |
| 58 | |
| 59 | return sa1111_pcmcia_hw_init(skt); |
| 60 | } |
| 61 | |
| 62 | static int |
| 63 | lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 64 | const socket_state_t *state) |
| 65 | { |
| 66 | unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set; |
| 67 | int ret = 0; |
| 68 | |
| 69 | pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0; |
| 70 | |
| 71 | /* Lubbock uses the Maxim MAX1602, with the following connections: |
| 72 | * |
| 73 | * Socket 0 (PCMCIA): |
| 74 | * MAX1602 Lubbock Register |
| 75 | * Pin Signal |
| 76 | * ----- ------- ---------------------- |
| 77 | * A0VPP S0_PWR0 SA-1111 GPIO A<0> |
| 78 | * A1VPP S0_PWR1 SA-1111 GPIO A<1> |
| 79 | * A0VCC S0_PWR2 SA-1111 GPIO A<2> |
| 80 | * A1VCC S0_PWR3 SA-1111 GPIO A<3> |
| 81 | * VX VCC |
| 82 | * VY +3.3V |
| 83 | * 12IN +12V |
| 84 | * CODE +3.3V Cirrus Code, CODE = High (VY) |
| 85 | * |
| 86 | * Socket 1 (CF): |
| 87 | * MAX1602 Lubbock Register |
| 88 | * Pin Signal |
| 89 | * ----- ------- ---------------------- |
| 90 | * A0VPP GND VPP is not connected |
| 91 | * A1VPP GND VPP is not connected |
| 92 | * A0VCC S1_PWR0 MISC_WR<14> |
| 93 | * A1VCC S1_PWR1 MISC_WR<15> |
| 94 | * VX VCC |
| 95 | * VY +3.3V |
| 96 | * 12IN GND VPP is not connected |
| 97 | * CODE +3.3V Cirrus Code, CODE = High (VY) |
| 98 | * |
| 99 | */ |
| 100 | |
| 101 | again: |
| 102 | switch (skt->nr) { |
| 103 | case 0: |
| 104 | pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3; |
| 105 | |
| 106 | switch (state->Vcc) { |
| 107 | case 0: /* Hi-Z */ |
| 108 | break; |
| 109 | |
| 110 | case 33: /* VY */ |
| 111 | pa_dwr_set |= GPIO_A3; |
| 112 | break; |
| 113 | |
| 114 | case 50: /* VX */ |
| 115 | pa_dwr_set |= GPIO_A2; |
| 116 | break; |
| 117 | |
| 118 | default: |
| 119 | printk(KERN_ERR "%s(): unrecognized Vcc %u\n", |
| 120 | __FUNCTION__, state->Vcc); |
| 121 | ret = -1; |
| 122 | } |
| 123 | |
| 124 | switch (state->Vpp) { |
| 125 | case 0: /* Hi-Z */ |
| 126 | break; |
| 127 | |
| 128 | case 120: /* 12IN */ |
| 129 | pa_dwr_set |= GPIO_A1; |
| 130 | break; |
| 131 | |
| 132 | default: /* VCC */ |
| 133 | if (state->Vpp == state->Vcc) |
| 134 | pa_dwr_set |= GPIO_A0; |
| 135 | else { |
| 136 | printk(KERN_ERR "%s(): unrecognized Vpp %u\n", |
| 137 | __FUNCTION__, state->Vpp); |
| 138 | ret = -1; |
| 139 | break; |
| 140 | } |
| 141 | } |
| 142 | break; |
| 143 | |
| 144 | case 1: |
| 145 | misc_mask = (1 << 15) | (1 << 14); |
| 146 | |
| 147 | switch (state->Vcc) { |
| 148 | case 0: /* Hi-Z */ |
| 149 | break; |
| 150 | |
| 151 | case 33: /* VY */ |
| 152 | misc_set |= 1 << 15; |
| 153 | break; |
| 154 | |
| 155 | case 50: /* VX */ |
| 156 | misc_set |= 1 << 14; |
| 157 | break; |
| 158 | |
| 159 | default: |
| 160 | printk(KERN_ERR "%s(): unrecognized Vcc %u\n", |
| 161 | __FUNCTION__, state->Vcc); |
| 162 | ret = -1; |
| 163 | break; |
| 164 | } |
| 165 | |
| 166 | if (state->Vpp != state->Vcc && state->Vpp != 0) { |
| 167 | printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n", |
| 168 | __FUNCTION__, state->Vpp); |
| 169 | ret = -1; |
| 170 | break; |
| 171 | } |
| 172 | break; |
| 173 | |
| 174 | default: |
| 175 | ret = -1; |
| 176 | } |
| 177 | |
| 178 | if (ret == 0) |
| 179 | ret = sa1111_pcmcia_configure_socket(skt, state); |
| 180 | |
| 181 | if (ret == 0) { |
| 182 | lubbock_set_misc_wr(misc_mask, misc_set); |
| 183 | sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set); |
| 184 | } |
| 185 | |
| 186 | #if 1 |
| 187 | if (ret == 0 && state->Vcc == 33) { |
| 188 | struct pcmcia_state new_state; |
| 189 | |
| 190 | /* |
| 191 | * HACK ALERT: |
| 192 | * We can't sense the voltage properly on Lubbock before |
| 193 | * actually applying some power to the socket (catch 22). |
| 194 | * Resense the socket Voltage Sense pins after applying |
| 195 | * socket power. |
| 196 | * |
| 197 | * Note: It takes about 2.5ms for the MAX1602 VCC output |
| 198 | * to rise. |
| 199 | */ |
| 200 | mdelay(3); |
| 201 | |
| 202 | sa1111_pcmcia_socket_state(skt, &new_state); |
| 203 | |
| 204 | if (!new_state.vs_3v && !new_state.vs_Xv) { |
| 205 | /* |
| 206 | * Switch to 5V, Configure socket with 5V voltage |
| 207 | */ |
| 208 | lubbock_set_misc_wr(misc_mask, 0); |
| 209 | sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, 0); |
| 210 | |
| 211 | /* |
| 212 | * It takes about 100ms to turn off Vcc. |
| 213 | */ |
| 214 | mdelay(100); |
| 215 | |
| 216 | /* |
| 217 | * We need to hack around the const qualifier as |
| 218 | * well to keep this ugly workaround localized and |
| 219 | * not force it to the rest of the code. Barf bags |
| 220 | * avaliable in the seat pocket in front of you! |
| 221 | */ |
| 222 | ((socket_state_t *)state)->Vcc = 50; |
| 223 | ((socket_state_t *)state)->Vpp = 50; |
| 224 | goto again; |
| 225 | } |
| 226 | } |
| 227 | #endif |
| 228 | |
| 229 | return ret; |
| 230 | } |
| 231 | |
| 232 | static struct pcmcia_low_level lubbock_pcmcia_ops = { |
| 233 | .owner = THIS_MODULE, |
| 234 | .hw_init = lubbock_pcmcia_hw_init, |
| 235 | .hw_shutdown = sa1111_pcmcia_hw_shutdown, |
| 236 | .socket_state = sa1111_pcmcia_socket_state, |
| 237 | .configure_socket = lubbock_pcmcia_configure_socket, |
| 238 | .socket_init = sa1111_pcmcia_socket_init, |
| 239 | .socket_suspend = sa1111_pcmcia_socket_suspend, |
| 240 | .first = 0, |
| 241 | .nr = 2, |
| 242 | }; |
| 243 | |
| 244 | #include "pxa2xx_base.h" |
| 245 | |
| 246 | int __init pcmcia_lubbock_init(struct sa1111_dev *sadev) |
| 247 | { |
| 248 | int ret = -ENODEV; |
| 249 | |
| 250 | if (machine_is_lubbock()) { |
| 251 | /* |
| 252 | * Set GPIO_A<3:0> to be outputs for the MAX1600, |
| 253 | * and switch to standby mode. |
| 254 | */ |
| 255 | sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0); |
| 256 | sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); |
| 257 | sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0); |
| 258 | |
| 259 | /* Set CF Socket 1 power to standby mode. */ |
| 260 | lubbock_set_misc_wr((1 << 15) | (1 << 14), 0); |
| 261 | |
| 262 | sadev->dev.platform_data = &lubbock_pcmcia_ops; |
Russell King | 9468613 | 2006-10-28 22:42:56 +0100 | [diff] [blame] | 263 | ret = __pxa2xx_drv_pcmcia_probe(&sadev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | return ret; |
| 267 | } |
| 268 | |
| 269 | MODULE_LICENSE("GPL"); |