linux/drivers/pcmcia/pxa2xx_vpac270.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/drivers/pcmcia/pxa2xx_vpac270.c
   4 *
   5 * Driver for Voipac PXA270 PCMCIA and CF sockets
   6 *
   7 * Copyright (C) 2010-2011 Marek Vasut <marek.vasut@gmail.com>
   8 */
   9
  10#include <linux/gpio.h>
  11#include <linux/module.h>
  12#include <linux/platform_device.h>
  13
  14#include <asm/mach-types.h>
  15
  16#include <mach/vpac270.h>
  17
  18#include "soc_common.h"
  19
  20static struct gpio vpac270_pcmcia_gpios[] = {
  21        { GPIO107_VPAC270_PCMCIA_PPEN,  GPIOF_INIT_LOW, "PCMCIA PPEN" },
  22        { GPIO11_VPAC270_PCMCIA_RESET,  GPIOF_INIT_LOW, "PCMCIA Reset" },
  23};
  24
  25static struct gpio vpac270_cf_gpios[] = {
  26        { GPIO16_VPAC270_CF_RESET,      GPIOF_INIT_LOW, "CF Reset" },
  27};
  28
  29static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  30{
  31        int ret;
  32
  33        if (skt->nr == 0) {
  34                ret = gpio_request_array(vpac270_pcmcia_gpios,
  35                                ARRAY_SIZE(vpac270_pcmcia_gpios));
  36
  37                skt->stat[SOC_STAT_CD].gpio = GPIO84_VPAC270_PCMCIA_CD;
  38                skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
  39                skt->stat[SOC_STAT_RDY].gpio = GPIO35_VPAC270_PCMCIA_RDY;
  40                skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  41        } else {
  42                ret = gpio_request_array(vpac270_cf_gpios,
  43                                ARRAY_SIZE(vpac270_cf_gpios));
  44
  45                skt->stat[SOC_STAT_CD].gpio = GPIO17_VPAC270_CF_CD;
  46                skt->stat[SOC_STAT_CD].name = "CF CD";
  47                skt->stat[SOC_STAT_RDY].gpio = GPIO12_VPAC270_CF_RDY;
  48                skt->stat[SOC_STAT_RDY].name = "CF Ready";
  49        }
  50
  51        return ret;
  52}
  53
  54static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  55{
  56        if (skt->nr == 0)
  57                gpio_free_array(vpac270_pcmcia_gpios,
  58                                        ARRAY_SIZE(vpac270_pcmcia_gpios));
  59        else
  60                gpio_free_array(vpac270_cf_gpios,
  61                                        ARRAY_SIZE(vpac270_cf_gpios));
  62}
  63
  64static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  65                                        struct pcmcia_state *state)
  66{
  67        state->vs_3v  = 1;
  68        state->vs_Xv  = 0;
  69}
  70
  71static int
  72vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  73                                const socket_state_t *state)
  74{
  75        if (skt->nr == 0) {
  76                gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
  77                        (state->flags & SS_RESET));
  78                gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
  79                        !(state->Vcc == 33 || state->Vcc == 50));
  80        } else {
  81                gpio_set_value(GPIO16_VPAC270_CF_RESET,
  82                        (state->flags & SS_RESET));
  83        }
  84
  85        return 0;
  86}
  87
  88static struct pcmcia_low_level vpac270_pcmcia_ops = {
  89        .owner                  = THIS_MODULE,
  90
  91        .first                  = 0,
  92        .nr                     = 2,
  93
  94        .hw_init                = vpac270_pcmcia_hw_init,
  95        .hw_shutdown            = vpac270_pcmcia_hw_shutdown,
  96
  97        .socket_state           = vpac270_pcmcia_socket_state,
  98        .configure_socket       = vpac270_pcmcia_configure_socket,
  99};
 100
 101static struct platform_device *vpac270_pcmcia_device;
 102
 103static int __init vpac270_pcmcia_init(void)
 104{
 105        int ret;
 106
 107        if (!machine_is_vpac270())
 108                return -ENODEV;
 109
 110        vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 111        if (!vpac270_pcmcia_device)
 112                return -ENOMEM;
 113
 114        ret = platform_device_add_data(vpac270_pcmcia_device,
 115                &vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
 116
 117        if (!ret)
 118                ret = platform_device_add(vpac270_pcmcia_device);
 119
 120        if (ret)
 121                platform_device_put(vpac270_pcmcia_device);
 122
 123        return ret;
 124}
 125
 126static void __exit vpac270_pcmcia_exit(void)
 127{
 128        platform_device_unregister(vpac270_pcmcia_device);
 129}
 130
 131module_init(vpac270_pcmcia_init);
 132module_exit(vpac270_pcmcia_exit);
 133
 134MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 135MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
 136MODULE_ALIAS("platform:pxa2xx-pcmcia");
 137MODULE_LICENSE("GPL");
 138