LXR linux/drivers/pcmcia/pxa2xx

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Toshiba e740 PCMCIA specific routines.
   4 *
   5 * (c) 2004 Ian Molton <spyro@f2s.com>
   6 */
   7
   8#include <linux/init.h>
   9#include <linux/module.h>
  10#include <linux/kernel.h>
  11#include <linux/errno.h>
  12#include <linux/gpio.h>
  13#include <linux/interrupt.h>
  14#include <linux/platform_device.h>
  15
  16#include <mach/eseries-gpio.h>
  17
  18#include <asm/irq.h>
  19#include <asm/mach-types.h>
  20
  21#include "soc_common.h"
  22
  23static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  24{
  25        if (skt->nr == 0) {
  26                skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD0;
  27                skt->stat[SOC_STAT_CD].name = "CF card detect";
  28                skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY0;
  29                skt->stat[SOC_STAT_RDY].name = "CF ready";
  30        } else {
  31                skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD1;
  32                skt->stat[SOC_STAT_CD].name = "Wifi switch";
  33                skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY1;
  34                skt->stat[SOC_STAT_RDY].name = "Wifi ready";
  35        }
  36
  37        return 0;
  38}
  39
  40static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  41                                        struct pcmcia_state *state)
  42{
  43        state->vs_3v  = 1;
  44        state->vs_Xv  = 0;
  45}
  46
  47static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  48                                        const socket_state_t *state)
  49{
  50        if (state->flags & SS_RESET) {
  51                if (skt->nr == 0)
  52                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
  53                else
  54                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
  55        } else {
  56                if (skt->nr == 0)
  57                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
  58                else
  59                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
  60        }
  61
  62        switch (state->Vcc) {
  63        case 0: /* Socket off */
  64                if (skt->nr == 0)
  65                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
  66                else
  67                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
  68                break;
  69        case 50:
  70        case 33: /* socket on */
  71                if (skt->nr == 0)
  72                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
  73                else
  74                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
  75                break;
  76        default:
  77                printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
  78        }
  79
  80        return 0;
  81}
  82
  83static struct pcmcia_low_level e740_pcmcia_ops = {
  84        .owner            = THIS_MODULE,
  85        .hw_init          = e740_pcmcia_hw_init,
  86        .socket_state     = e740_pcmcia_socket_state,
  87        .configure_socket = e740_pcmcia_configure_socket,
  88        .nr               = 2,
  89};
  90
  91static struct platform_device *e740_pcmcia_device;
  92
  93static int __init e740_pcmcia_init(void)
  94{
  95        int ret;
  96
  97        if (!machine_is_e740())
  98                return -ENODEV;
  99
 100        e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 101        if (!e740_pcmcia_device)
 102                return -ENOMEM;
 103
 104        ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
 105                                        sizeof(e740_pcmcia_ops));
 106
 107        if (!ret)
 108                ret = platform_device_add(e740_pcmcia_device);
 109
 110        if (ret)
 111                platform_device_put(e740_pcmcia_device);
 112
 113        return ret;
 114}
 115
 116static void __exit e740_pcmcia_exit(void)
 117{
 118        platform_device_unregister(e740_pcmcia_device);
 119}
 120
 121module_init(e740_pcmcia_init);
 122module_exit(e740_pcmcia_exit);
 123
 124MODULE_LICENSE("GPL v2");
 125MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 126MODULE_ALIAS("platform:pxa2xx-pcmcia");
 127MODULE_DESCRIPTION("e740 PCMCIA platform support");
 128