drivers/pcmcia/sa1100_h3600.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * drivers/pcmcia/sa1100_h3600.c
   4  *
   5  * PCMCIA implementation routines for H3600
   6  *
   7  */
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/device.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/gpio.h>
  15
  16 #include <mach/hardware.h>
  17 #include <asm/irq.h>
  18 #include <asm/mach-types.h>
  19 #include <mach/h3xxx.h>
  20
  21 #include "sa1100_generic.h"
  22
  23 static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  24 {
  25         int err;
  26
  27         switch (skt->nr) {
  28         case 0:
  29                 skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD0;
  30                 skt->stat[SOC_STAT_CD].name = "PCMCIA CD0";
  31                 skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ0;
  32                 skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ0";
  33
  34                 err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
  35                 if (err)
  36                         goto err01;
  37                 err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
  38                 if (err)
  39                         goto err03;
  40                 err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
  41                 if (err)
  42                         goto err03;
  43                 err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
  44                 if (err)
  45                         goto err04;
  46                 err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
  47                 if (err)
  48                         goto err04;
  49                 err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
  50                 if (err)
  51                         goto err05;
  52                 err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
  53                 if (err)
  54                         goto err05;
  55                 err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
  56                 if (err)
  57                         goto err06;
  58                 break;
  59         case 1:
  60                 skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD1;
  61                 skt->stat[SOC_STAT_CD].name = "PCMCIA CD1";
  62                 skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ1;
  63                 skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ1";
  64                 break;
  65         }
  66         return 0;
  67
  68 err06:  gpio_free(H3XXX_EGPIO_CARD_RESET);
  69 err05:  gpio_free(H3XXX_EGPIO_OPT_RESET);
  70 err04:  gpio_free(H3XXX_EGPIO_OPT_ON);
  71 err03:  gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  72 err01:  gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
  73         return err;
  74 }
  75
  76 static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  77 {
  78         switch (skt->nr) {
  79         case 0:
  80                 /* Disable CF bus: */
  81                 gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
  82                 gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
  83                 gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
  84
  85                 gpio_free(H3XXX_EGPIO_CARD_RESET);
  86                 gpio_free(H3XXX_EGPIO_OPT_RESET);
  87                 gpio_free(H3XXX_EGPIO_OPT_ON);
  88                 gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  89                 break;
  90         case 1:
  91                 break;
  92         }
  93 }
  94
  95 static void
  96 h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  97 {
  98         state->bvd1 = 0;
  99         state->bvd2 = 0;
 100         state->vs_3v = 0;
 101         state->vs_Xv = 0;
 102 }
 103
 104 static int
 105 h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
 106 {
 107         if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
 108                 printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
 109                        state->Vcc / 10, state->Vcc % 10);
 110                 return -1;
 111         }
 112
 113         gpio_set_value(H3XXX_EGPIO_CARD_RESET, !!(state->flags & SS_RESET));
 114
 115         /* Silently ignore Vpp, output enable, speaker enable. */
 116
 117         return 0;
 118 }
 119
 120 static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 121 {
 122         /* Enable CF bus: */
 123         gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 1);
 124         gpio_set_value(H3XXX_EGPIO_OPT_ON, 1);
 125         gpio_set_value(H3XXX_EGPIO_OPT_RESET, 0);
 126
 127         msleep(10);
 128 }
 129
 130 static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 131 {
 132         /*
 133          * FIXME:  This doesn't fit well.  We don't have the mechanism in
 134          * the generic PCMCIA layer to deal with the idea of two sockets
 135          * on one bus.  We rely on the cs.c behaviour shutting down
 136          * socket 0 then socket 1.
 137          */
 138         if (skt->nr == 1) {
 139                 gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
 140                 gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
 141                 /* hmm, does this suck power? */
 142                 gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
 143         }
 144 }
 145
 146 struct pcmcia_low_level h3600_pcmcia_ops = {
 147         .owner                  = THIS_MODULE,
 148         .hw_init                = h3600_pcmcia_hw_init,
 149         .hw_shutdown            = h3600_pcmcia_hw_shutdown,
 150         .socket_state           = h3600_pcmcia_socket_state,
 151         .configure_socket       = h3600_pcmcia_configure_socket,
 152
 153         .socket_init            = h3600_pcmcia_socket_init,
 154         .socket_suspend         = h3600_pcmcia_socket_suspend,
 155 };
 156
 157 int pcmcia_h3600_init(struct device *dev)
 158 {
 159         int ret = -ENODEV;
 160
 161         if (machine_is_h3600() || machine_is_h3100())
 162                 ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
 163
 164         return ret;
 165 }