drivers/pcmcia/sa1100_h3600.c

   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
  22 static 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
  67 err06:  gpio_free(H3XXX_EGPIO_CARD_RESET);
  68 err05:  gpio_free(H3XXX_EGPIO_OPT_RESET);
  69 err04:  gpio_free(H3XXX_EGPIO_OPT_ON);
  70 err03:  gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  71 err01:  gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
  72         return err;
  73 }
  74
  75 static 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
  94 static void
  95 h3600_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
 103 static int
 104 h3600_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
 119 static 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
 129 static 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
 145 struct 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
 156 int __devinit 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 }