text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * linux/drivers/pcmcia/pxa2xx_vpac270.c
   *
   * Driver for Voipac PXA270 PCMCIA and CF sockets
   *
   * Copyright (C) 2010-2011 Marek Vasut <marek.vasut@gmail.com>
   */
  
  #include <linux/gpio.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  
  #include <asm/mach-types.h>
  
  #include <mach/vpac270.h>
  
  #include "soc_common.h"
  
  static struct gpio vpac270_pcmcia_gpios[] = {
  	{ GPIO107_VPAC270_PCMCIA_PPEN,	GPIOF_INIT_LOW,	"PCMCIA PPEN" },
  	{ GPIO11_VPAC270_PCMCIA_RESET,	GPIOF_INIT_LOW,	"PCMCIA Reset" },
  };
  
  static struct gpio vpac270_cf_gpios[] = {
  	{ GPIO16_VPAC270_CF_RESET,	GPIOF_INIT_LOW,	"CF Reset" },
  };
  
  static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {
  	int ret;
  
  	if (skt->nr == 0) {
  		ret = gpio_request_array(vpac270_pcmcia_gpios,
  				ARRAY_SIZE(vpac270_pcmcia_gpios));
  
  		skt->stat[SOC_STAT_CD].gpio = GPIO84_VPAC270_PCMCIA_CD;
  		skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
  		skt->stat[SOC_STAT_RDY].gpio = GPIO35_VPAC270_PCMCIA_RDY;
  		skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  	} else {
  		ret = gpio_request_array(vpac270_cf_gpios,
  				ARRAY_SIZE(vpac270_cf_gpios));
  
  		skt->stat[SOC_STAT_CD].gpio = GPIO17_VPAC270_CF_CD;
  		skt->stat[SOC_STAT_CD].name = "CF CD";
  		skt->stat[SOC_STAT_RDY].gpio = GPIO12_VPAC270_CF_RDY;
  		skt->stat[SOC_STAT_RDY].name = "CF Ready";
  	}
  
  	return ret;
  }
  
  static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {
  	if (skt->nr == 0)
  		gpio_free_array(vpac270_pcmcia_gpios,
  					ARRAY_SIZE(vpac270_pcmcia_gpios));
  	else
  		gpio_free_array(vpac270_cf_gpios,
  					ARRAY_SIZE(vpac270_cf_gpios));
  }
  
  static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  					struct pcmcia_state *state)
  {
  	state->vs_3v  = 1;
  	state->vs_Xv  = 0;
  }
  
  static int
  vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  				const socket_state_t *state)
  {
  	if (skt->nr == 0) {
  		gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
  			(state->flags & SS_RESET));
  		gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
  			!(state->Vcc == 33 || state->Vcc == 50));
  	} else {
  		gpio_set_value(GPIO16_VPAC270_CF_RESET,
  			(state->flags & SS_RESET));
  	}
  
  	return 0;
  }
  
  static struct pcmcia_low_level vpac270_pcmcia_ops = {
  	.owner			= THIS_MODULE,
  
  	.first			= 0,
  	.nr			= 2,
  
  	.hw_init		= vpac270_pcmcia_hw_init,
  	.hw_shutdown		= vpac270_pcmcia_hw_shutdown,
  
  	.socket_state		= vpac270_pcmcia_socket_state,
  	.configure_socket	= vpac270_pcmcia_configure_socket,
  };
  
  static struct platform_device *vpac270_pcmcia_device;
  
  static int __init vpac270_pcmcia_init(void)
  {
  	int ret;
  
  	if (!machine_is_vpac270())
  		return -ENODEV;
  
  	vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  	if (!vpac270_pcmcia_device)
  		return -ENOMEM;
  
  	ret = platform_device_add_data(vpac270_pcmcia_device,
  		&vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
  
  	if (!ret)
  		ret = platform_device_add(vpac270_pcmcia_device);
  
  	if (ret)
  		platform_device_put(vpac270_pcmcia_device);
  
  	return ret;
  }
  
  static void __exit vpac270_pcmcia_exit(void)
  {
  	platform_device_unregister(vpac270_pcmcia_device);
  }
  
  module_init(vpac270_pcmcia_init);
  module_exit(vpac270_pcmcia_exit);
  
  MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
  MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
  MODULE_ALIAS("platform:pxa2xx-pcmcia");
  MODULE_LICENSE("GPL");
  