linux/drivers/pcmcia/sa1111_lubbock.c
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   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 <mach/hardware.h>
  25#include <asm/hardware/sa1111.h>
  26#include <asm/mach-types.h>
  27#include <mach/lubbock.h>
  28
  29#include "sa1111_generic.h"
  30
  31static int
  32lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  33                                const socket_state_t *state)
  34{
  35        struct sa1111_pcmcia_socket *s = to_skt(skt);
  36        unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
  37        int ret = 0;
  38
  39        pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;
  40
  41        /* Lubbock uses the Maxim MAX1602, with the following connections:
  42         *
  43         * Socket 0 (PCMCIA):
  44         *      MAX1602 Lubbock         Register
  45         *      Pin     Signal
  46         *      -----   -------         ----------------------
  47         *      A0VPP   S0_PWR0         SA-1111 GPIO A<0>
  48         *      A1VPP   S0_PWR1         SA-1111 GPIO A<1>
  49         *      A0VCC   S0_PWR2         SA-1111 GPIO A<2>
  50         *      A1VCC   S0_PWR3         SA-1111 GPIO A<3>
  51         *      VX      VCC
  52         *      VY      +3.3V
  53         *      12IN    +12V
  54         *      CODE    +3.3V           Cirrus  Code, CODE = High (VY)
  55         *
  56         * Socket 1 (CF):
  57         *      MAX1602 Lubbock         Register
  58         *      Pin     Signal
  59         *      -----   -------         ----------------------
  60         *      A0VPP   GND             VPP is not connected
  61         *      A1VPP   GND             VPP is not connected
  62         *      A0VCC   S1_PWR0         MISC_WR<14>
  63         *      A1VCC   S1_PWR1         MISC_WR<15>
  64         *      VX      VCC
  65         *      VY      +3.3V
  66         *      12IN    GND             VPP is not connected
  67         *      CODE    +3.3V           Cirrus  Code, CODE = High (VY)
  68         *
  69         */
  70
  71 again:
  72        switch (skt->nr) {
  73        case 0:
  74                pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
  75
  76                switch (state->Vcc) {
  77                case 0: /* Hi-Z */
  78                        break;
  79
  80                case 33: /* VY */
  81                        pa_dwr_set |= GPIO_A3;
  82                        break;
  83
  84                case 50: /* VX */
  85                        pa_dwr_set |= GPIO_A2;
  86                        break;
  87
  88                default:
  89                        printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  90                               __func__, state->Vcc);
  91                        ret = -1;
  92                }
  93
  94                switch (state->Vpp) {
  95                case 0: /* Hi-Z */
  96                        break;
  97
  98                case 120: /* 12IN */
  99                        pa_dwr_set |= GPIO_A1;
 100                        break;
 101
 102                default: /* VCC */
 103                        if (state->Vpp == state->Vcc)
 104                                pa_dwr_set |= GPIO_A0;
 105                        else {
 106                                printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
 107                                       __func__, state->Vpp);
 108                                ret = -1;
 109                                break;
 110                        }
 111                }
 112                break;
 113
 114        case 1:
 115                misc_mask = (1 << 15) | (1 << 14);
 116
 117                switch (state->Vcc) {
 118                case 0: /* Hi-Z */
 119                        break;
 120
 121                case 33: /* VY */
 122                        misc_set |= 1 << 15;
 123                        break;
 124
 125                case 50: /* VX */
 126                        misc_set |= 1 << 14;
 127                        break;
 128
 129                default:
 130                        printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
 131                               __func__, state->Vcc);
 132                        ret = -1;
 133                        break;
 134                }
 135
 136                if (state->Vpp != state->Vcc && state->Vpp != 0) {
 137                        printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
 138                               __func__, state->Vpp);
 139                        ret = -1;
 140                        break;
 141                }
 142                break;
 143
 144        default:
 145                ret = -1;
 146        }
 147
 148        if (ret == 0)
 149                ret = sa1111_pcmcia_configure_socket(skt, state);
 150
 151        if (ret == 0) {
 152                lubbock_set_misc_wr(misc_mask, misc_set);
 153                sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
 154        }
 155
 156#if 1
 157        if (ret == 0 && state->Vcc == 33) {
 158                struct pcmcia_state new_state;
 159
 160                /*
 161                 * HACK ALERT:
 162                 * We can't sense the voltage properly on Lubbock before
 163                 * actually applying some power to the socket (catch 22).
 164                 * Resense the socket Voltage Sense pins after applying
 165                 * socket power.
 166                 *
 167                 * Note: It takes about 2.5ms for the MAX1602 VCC output
 168                 * to rise.
 169                 */
 170                mdelay(3);
 171
 172                sa1111_pcmcia_socket_state(skt, &new_state);
 173
 174                if (!new_state.vs_3v && !new_state.vs_Xv) {
 175                        /*
 176                         * Switch to 5V,  Configure socket with 5V voltage
 177                         */
 178                        lubbock_set_misc_wr(misc_mask, 0);
 179                        sa1111_set_io(s->dev, pa_dwr_mask, 0);
 180
 181                        /*
 182                         * It takes about 100ms to turn off Vcc.
 183                         */
 184                        mdelay(100);
 185
 186                        /*
 187                         * We need to hack around the const qualifier as
 188                         * well to keep this ugly workaround localized and
 189                         * not force it to the rest of the code. Barf bags
 190                         * available in the seat pocket in front of you!
 191                         */
 192                        ((socket_state_t *)state)->Vcc = 50;
 193                        ((socket_state_t *)state)->Vpp = 50;
 194                        goto again;
 195                }
 196        }
 197#endif
 198
 199        return ret;
 200}
 201
 202static struct pcmcia_low_level lubbock_pcmcia_ops = {
 203        .owner                  = THIS_MODULE,
 204        .configure_socket       = lubbock_pcmcia_configure_socket,
 205        .first                  = 0,
 206        .nr                     = 2,
 207};
 208
 209#include "pxa2xx_base.h"
 210
 211int pcmcia_lubbock_init(struct sa1111_dev *sadev)
 212{
 213        int ret = -ENODEV;
 214
 215        if (machine_is_lubbock()) {
 216                /*
 217                 * Set GPIO_A<3:0> to be outputs for the MAX1600,
 218                 * and switch to standby mode.
 219                 */
 220                sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
 221                sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
 222                sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
 223
 224                /* Set CF Socket 1 power to standby mode. */
 225                lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
 226
 227                pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
 228                pxa2xx_configure_sockets(&sadev->dev);
 229                ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
 230                                pxa2xx_drv_pcmcia_add_one);
 231        }
 232
 233        return ret;
 234}
 235
 236MODULE_LICENSE("GPL");
 237
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