drivers/pcmcia/pxa2xx_lubbock.c

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