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/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;
 263                 ret = pxa2xx_drv_pcmcia_probe(&sadev->dev);
 264         }
 265
 266         return ret;
 267 }