Eric Lee / smarc-fsl-linux-kernel

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drivers/pcmcia/pxa2xx_palmtx.c 2.76 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  /*
   * linux/drivers/pcmcia/pxa2xx_palmtx.c
   *
   * Driver for Palm T|X PCMCIA
   *
   * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   */
  
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/gpio.h>
  
  #include <asm/mach-types.h>
  #include <mach/palmtx.h>
  #include "soc_common.h"
  
  static struct gpio palmtx_pcmcia_gpios[] = {
  	{ GPIO_NR_PALMTX_PCMCIA_POWER1,	GPIOF_INIT_LOW,	"PCMCIA Power 1" },
  	{ GPIO_NR_PALMTX_PCMCIA_POWER2,	GPIOF_INIT_LOW,	"PCMCIA Power 2" },
  	{ GPIO_NR_PALMTX_PCMCIA_RESET,	GPIOF_INIT_HIGH,"PCMCIA Reset" },
  };
  
  static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {
  	int ret;
  
  	ret = gpio_request_array(palmtx_pcmcia_gpios,
  				ARRAY_SIZE(palmtx_pcmcia_gpios));
  
  	skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTX_PCMCIA_READY;
  	skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  
  	return ret;
  }
  
  static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {
  	gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
  }
  
  static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  					struct pcmcia_state *state)
  {
  	state->detect = 1; /* always inserted */
  	state->vs_3v  = 1;
  	state->vs_Xv  = 0;
  }
  
  static int
  palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  				const socket_state_t *state)
  {
  	gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
  	gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
  	gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
  			!!(state->flags & SS_RESET));
  
  	return 0;
  }
  
  static struct pcmcia_low_level palmtx_pcmcia_ops = {
  	.owner			= THIS_MODULE,
  
  	.first			= 0,
  	.nr			= 1,
  
  	.hw_init		= palmtx_pcmcia_hw_init,
  	.hw_shutdown		= palmtx_pcmcia_hw_shutdown,
  
  	.socket_state		= palmtx_pcmcia_socket_state,
  	.configure_socket	= palmtx_pcmcia_configure_socket,
  };
  
  static struct platform_device *palmtx_pcmcia_device;
  
  static int __init palmtx_pcmcia_init(void)
  {
  	int ret;
  
  	if (!machine_is_palmtx())
  		return -ENODEV;
  
  	palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  	if (!palmtx_pcmcia_device)
  		return -ENOMEM;
  
  	ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
  					sizeof(palmtx_pcmcia_ops));
  
  	if (!ret)
  		ret = platform_device_add(palmtx_pcmcia_device);
  
  	if (ret)
  		platform_device_put(palmtx_pcmcia_device);
  
  	return ret;
  }
  
  static void __exit palmtx_pcmcia_exit(void)
  {
  	platform_device_unregister(palmtx_pcmcia_device);
  }
  
  module_init(palmtx_pcmcia_init);
  module_exit(palmtx_pcmcia_exit);
  
  MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
  MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
  MODULE_ALIAS("platform:pxa2xx-pcmcia");
  MODULE_LICENSE("GPL");