LXR linux/drivers/pcmcia/sa1100

   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
  23static 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
  66err06:  gpio_free(H3XXX_EGPIO_CARD_RESET);
  67err05:  gpio_free(H3XXX_EGPIO_OPT_RESET);
  68err04:  gpio_free(H3XXX_EGPIO_OPT_ON);
  69err03:  gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
  70err01:  gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
  71        return err;
  72}
  73
  74static 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
  93static void
  94h3600_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
 102static int
 103h3600_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
 118static 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
 128static 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
 144struct 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
 155int 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}
 164