drivers/pcmcia/pxa2xx_palmtx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/pcmcia/pxa2xx_palmtx.c
   4  *
   5  * Driver for Palm T|X PCMCIA
   6  *
   7  * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/gpio.h>
  13
  14 #include <asm/mach-types.h>
  15 #include <mach/palmtx.h>
  16 #include "soc_common.h"
  17
  18 static struct gpio palmtx_pcmcia_gpios[] = {
  19         { GPIO_NR_PALMTX_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
  20         { GPIO_NR_PALMTX_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
  21         { GPIO_NR_PALMTX_PCMCIA_RESET,  GPIOF_INIT_HIGH,"PCMCIA Reset" },
  22 };
  23
  24 static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  25 {
  26         int ret;
  27
  28         ret = gpio_request_array(palmtx_pcmcia_gpios,
  29                                 ARRAY_SIZE(palmtx_pcmcia_gpios));
  30
  31         skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTX_PCMCIA_READY;
  32         skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  33
  34         return ret;
  35 }
  36
  37 static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  38 {
  39         gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
  40 }
  41
  42 static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  43                                         struct pcmcia_state *state)
  44 {
  45         state->detect = 1; /* always inserted */
  46         state->vs_3v  = 1;
  47         state->vs_Xv  = 0;
  48 }
  49
  50 static int
  51 palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  52                                 const socket_state_t *state)
  53 {
  54         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
  55         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
  56         gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
  57                         !!(state->flags & SS_RESET));
  58
  59         return 0;
  60 }
  61
  62 static struct pcmcia_low_level palmtx_pcmcia_ops = {
  63         .owner                  = THIS_MODULE,
  64
  65         .first                  = 0,
  66         .nr                     = 1,
  67
  68         .hw_init                = palmtx_pcmcia_hw_init,
  69         .hw_shutdown            = palmtx_pcmcia_hw_shutdown,
  70
  71         .socket_state           = palmtx_pcmcia_socket_state,
  72         .configure_socket       = palmtx_pcmcia_configure_socket,
  73 };
  74
  75 static struct platform_device *palmtx_pcmcia_device;
  76
  77 static int __init palmtx_pcmcia_init(void)
  78 {
  79         int ret;
  80
  81         if (!machine_is_palmtx())
  82                 return -ENODEV;
  83
  84         palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  85         if (!palmtx_pcmcia_device)
  86                 return -ENOMEM;
  87
  88         ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
  89                                         sizeof(palmtx_pcmcia_ops));
  90
  91         if (!ret)
  92                 ret = platform_device_add(palmtx_pcmcia_device);
  93
  94         if (ret)
  95                 platform_device_put(palmtx_pcmcia_device);
  96
  97         return ret;
  98 }
  99
 100 static void __exit palmtx_pcmcia_exit(void)
 101 {
 102         platform_device_unregister(palmtx_pcmcia_device);
 103 }
 104
 105 module_init(palmtx_pcmcia_init);
 106 module_exit(palmtx_pcmcia_exit);
 107
 108 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 109 MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
 110 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 111 MODULE_LICENSE("GPL");