LXR linux/drivers/pcmcia/sa1100

   1/*
   2 * drivers/pcmcia/sa1100_h3600.c
   3 *
   4 * PCMCIA implementation routines for H3600
   5 *
   6 */
   7#include <linux/module.h>
   8#include <linux/kernel.h>
   9#include <linux/device.h>
  10#include <linux/interrupt.h>
  11#include <linux/init.h>
  12#include <linux/delay.h>
  13#include <linux/gpio.h>
  14
  15#include <mach/hardware.h>
  16#include <asm/irq.h>
  17#include <asm/mach-types.h>
  18#include <mach/h3xxx.h>
  19
  20#include "sa1100_generic.h"
  21
  22static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  23{
  24        int err;
  25
  26        switch (skt->nr) {
  27        case 0:
  28                skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD0;
  29                skt->stat[SOC_STAT_CD].name = "PCMCIA CD0";
  30                skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ0;
  31                skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ0";
  32
  33                err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
  34                if (err)
  35                        goto err01;
  36                err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
  37                if (err)
  38                        goto err03;
  39                err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
  40                if (err)
  41                        goto err03;
  42                err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
  43                if (err)
  44                        goto err04;
  45                err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
  46                if (err)
  47                        goto err04;
  48                err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
  49                if (err)
  50                        goto err05;
  51                err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
  52                if (err)
  53                        goto err05;
  54                err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
  55                if (err)
  56                        goto err06;
  57                break;
  58        case 1:
  59                skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD1;
  60                skt->stat[SOC_STAT_CD].name = "PCMCIA CD1";
  61                skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ1;
  62                skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ1";
  63                break;
  64        }
  65        return 0;
  66
  67err06:  gpio_free(H3XXX_EGPIO_CARD_RESET);
  68err05:  gpio_free(H3XXX_EGPIO_OPT_RESET);
  69err04:  gpio_free(H3XXX_EGPIO_OPT_ON);
  70err03:  gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  71err01:  gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
  72        return err;
  73}
  74
  75static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  76{
  77        switch (skt->nr) {
  78        case 0:
  79                /* Disable CF bus: */
  80                gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
  81                gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
  82                gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
  83
  84                gpio_free(H3XXX_EGPIO_CARD_RESET);
  85                gpio_free(H3XXX_EGPIO_OPT_RESET);
  86                gpio_free(H3XXX_EGPIO_OPT_ON);
  87                gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  88                break;
  89        case 1:
  90                break;
  91        }
  92}
  93
  94static void
  95h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  96{
  97        state->bvd1 = 0;
  98        state->bvd2 = 0;
  99        state->vs_3v = 0;
 100        state->vs_Xv = 0;
 101}
 102
 103static int
 104h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
 105{
 106        if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
 107                printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
 108                       state->Vcc / 10, state->Vcc % 10);
 109                return -1;
 110        }
 111
 112        gpio_set_value(H3XXX_EGPIO_CARD_RESET, !!(state->flags & SS_RESET));
 113
 114        /* Silently ignore Vpp, output enable, speaker enable. */
 115
 116        return 0;
 117}
 118
 119static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 120{
 121        /* Enable CF bus: */
 122        gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 1);
 123        gpio_set_value(H3XXX_EGPIO_OPT_ON, 1);
 124        gpio_set_value(H3XXX_EGPIO_OPT_RESET, 0);
 125
 126        msleep(10);
 127}
 128
 129static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 130{
 131        /*
 132         * FIXME:  This doesn't fit well.  We don't have the mechanism in
 133         * the generic PCMCIA layer to deal with the idea of two sockets
 134         * on one bus.  We rely on the cs.c behaviour shutting down
 135         * socket 0 then socket 1.
 136         */
 137        if (skt->nr == 1) {
 138                gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
 139                gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
 140                /* hmm, does this suck power? */
 141                gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
 142        }
 143}
 144
 145struct pcmcia_low_level h3600_pcmcia_ops = { 
 146        .owner                  = THIS_MODULE,
 147        .hw_init                = h3600_pcmcia_hw_init,
 148        .hw_shutdown            = h3600_pcmcia_hw_shutdown,
 149        .socket_state           = h3600_pcmcia_socket_state,
 150        .configure_socket       = h3600_pcmcia_configure_socket,
 151
 152        .socket_init            = h3600_pcmcia_socket_init,
 153        .socket_suspend         = h3600_pcmcia_socket_suspend,
 154};
 155
 156int pcmcia_h3600_init(struct device *dev)
 157{
 158        int ret = -ENODEV;
 159
 160        if (machine_is_h3600() || machine_is_h3100())
 161                ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
 162
 163        return ret;
 164}
 165