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         skt->stat[SOC_STAT_CD].name = skt->nr ? "pcmcia1-detect" : "pcmcia0-detect";
  28         skt->stat[SOC_STAT_RDY].name = skt->nr ? "pcmcia1-ready" : "pcmcia0-ready";
  29
  30         err = soc_pcmcia_request_gpiods(skt);
  31         if (err)
  32                 return err;
  33
  34         switch (skt->nr) {
  35         case 0:
  36                 err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
  37                 if (err)
  38                         goto err01;
  39                 err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
  40                 if (err)
  41                         goto err03;
  42                 err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
  43                 if (err)
  44                         goto err03;
  45                 err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
  46                 if (err)
  47                         goto err04;
  48                 err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
  49                 if (err)
  50                         goto err04;
  51                 err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
  52                 if (err)
  53                         goto err05;
  54                 err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
  55                 if (err)
  56                         goto err05;
  57                 err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
  58                 if (err)
  59                         goto err06;
  60                 break;
  61         case 1:
  62                 break;
  63         }
  64         return 0;
  65
  66 err06:  gpio_free(H3XXX_EGPIO_CARD_RESET);
  67 err05:  gpio_free(H3XXX_EGPIO_OPT_RESET);
  68 err04:  gpio_free(H3XXX_EGPIO_OPT_ON);
  69 err03:  gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  70 err01:  gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
  71         return err;
  72 }
  73
  74 static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  75 {
  76         switch (skt->nr) {
  77         case 0:
  78                 /* Disable CF bus: */
  79                 gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
  80                 gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
  81                 gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
  82
  83                 gpio_free(H3XXX_EGPIO_CARD_RESET);
  84                 gpio_free(H3XXX_EGPIO_OPT_RESET);
  85                 gpio_free(H3XXX_EGPIO_OPT_ON);
  86                 gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  87                 break;
  88         case 1:
  89                 break;
  90         }
  91 }
  92
  93 static void
  94 h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  95 {
  96         state->bvd1 = 0;
  97         state->bvd2 = 0;
  98         state->vs_3v = 0;
  99         state->vs_Xv = 0;
 100 }
 101
 102 static int
 103 h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
 104 {
 105         if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
 106                 printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
 107                        state->Vcc / 10, state->Vcc % 10);
 108                 return -1;
 109         }
 110
 111         gpio_set_value(H3XXX_EGPIO_CARD_RESET, !!(state->flags & SS_RESET));
 112
 113         /* Silently ignore Vpp, output enable, speaker enable. */
 114
 115         return 0;
 116 }
 117
 118 static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 119 {
 120         /* Enable CF bus: */
 121         gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 1);
 122         gpio_set_value(H3XXX_EGPIO_OPT_ON, 1);
 123         gpio_set_value(H3XXX_EGPIO_OPT_RESET, 0);
 124
 125         msleep(10);
 126 }
 127
 128 static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 129 {
 130         /*
 131          * FIXME:  This doesn't fit well.  We don't have the mechanism in
 132          * the generic PCMCIA layer to deal with the idea of two sockets
 133          * on one bus.  We rely on the cs.c behaviour shutting down
 134          * socket 0 then socket 1.
 135          */
 136         if (skt->nr == 1) {
 137                 gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
 138                 gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
 139                 /* hmm, does this suck power? */
 140                 gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
 141         }
 142 }
 143
 144 struct pcmcia_low_level h3600_pcmcia_ops = {
 145         .owner                  = THIS_MODULE,
 146         .hw_init                = h3600_pcmcia_hw_init,
 147         .hw_shutdown            = h3600_pcmcia_hw_shutdown,
 148         .socket_state           = h3600_pcmcia_socket_state,
 149         .configure_socket       = h3600_pcmcia_configure_socket,
 150
 151         .socket_init            = h3600_pcmcia_socket_init,
 152         .socket_suspend         = h3600_pcmcia_socket_suspend,
 153 };
 154
 155 int pcmcia_h3600_init(struct device *dev)
 156 {
 157         int ret = -ENODEV;
 158
 159         if (machine_is_h3600() || machine_is_h3100())
 160                 ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
 161
 162         return ret;
 163 }