LXR linux/drivers/pcmcia/pxa2xx_cm

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/drivers/pcmcia/pxa/pxa_cm_x270.c
   4 *
   5 * Compulab Ltd., 2003, 2007, 2008
   6 * Mike Rapoport <mike@compulab.co.il>
   7 */
   8
   9#include <linux/platform_device.h>
  10#include <linux/irq.h>
  11#include <linux/delay.h>
  12#include <linux/gpio.h>
  13#include <linux/export.h>
  14
  15#include "soc_common.h"
  16
  17#define GPIO_PCMCIA_S0_CD_VALID (84)
  18#define GPIO_PCMCIA_S0_RDYINT   (82)
  19#define GPIO_PCMCIA_RESET       (53)
  20
  21static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  22{
  23        int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
  24        if (ret)
  25                return ret;
  26        gpio_direction_output(GPIO_PCMCIA_RESET, 0);
  27
  28        skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
  29        skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
  30        skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
  31        skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
  32
  33        return ret;
  34}
  35
  36static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
  37{
  38        gpio_free(GPIO_PCMCIA_RESET);
  39}
  40
  41
  42static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  43                                       struct pcmcia_state *state)
  44{
  45        state->vs_3v  = 0;
  46        state->vs_Xv  = 0;
  47}
  48
  49
  50static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  51                                          const socket_state_t *state)
  52{
  53        switch (skt->nr) {
  54        case 0:
  55                if (state->flags & SS_RESET) {
  56                        gpio_set_value(GPIO_PCMCIA_RESET, 1);
  57                        udelay(10);
  58                        gpio_set_value(GPIO_PCMCIA_RESET, 0);
  59                }
  60                break;
  61        }
  62
  63        return 0;
  64}
  65
  66static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
  67        .owner                  = THIS_MODULE,
  68        .hw_init                = cmx270_pcmcia_hw_init,
  69        .hw_shutdown            = cmx270_pcmcia_shutdown,
  70        .socket_state           = cmx270_pcmcia_socket_state,
  71        .configure_socket       = cmx270_pcmcia_configure_socket,
  72        .nr                     = 1,
  73};
  74
  75static struct platform_device *cmx270_pcmcia_device;
  76
  77int __init cmx270_pcmcia_init(void)
  78{
  79        int ret;
  80
  81        cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  82
  83        if (!cmx270_pcmcia_device)
  84                return -ENOMEM;
  85
  86        ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
  87                                       sizeof(cmx270_pcmcia_ops));
  88
  89        if (ret == 0) {
  90                printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
  91                ret = platform_device_add(cmx270_pcmcia_device);
  92        }
  93
  94        if (ret)
  95                platform_device_put(cmx270_pcmcia_device);
  96
  97        return ret;
  98}
  99
 100void __exit cmx270_pcmcia_exit(void)
 101{
 102        platform_device_unregister(cmx270_pcmcia_device);
 103}
 104