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/*
* VIPER PCMCIA support
* Copyright 2004 Arcom Control Systems
*
* Maintained by Marc Zyngier <maz@misterjones.org>
* <marc.zyngier@altran.com>
*
* Based on:
* iPAQ h2200 PCMCIA support
* Copyright 2004 Koen Kooi <koen@vestingbar.nl>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <pcmcia/ss.h>
#include <asm/irq.h>
#include <mach/pxa-regs.h>
#include <mach/viper.h>
#include <asm/mach-types.h>
#include "soc_common.h"
#include "pxa2xx_base.h"
static struct pcmcia_irqs irqs[] = {
{ 0, gpio_to_irq(VIPER_CF_CD_GPIO), "PCMCIA_CD" }
};
static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
unsigned long flags;
skt->irq = gpio_to_irq(VIPER_CF_RDY_GPIO);
if (gpio_request(VIPER_CF_CD_GPIO, "CF detect"))
goto err_request_cd;
if (gpio_request(VIPER_CF_RDY_GPIO, "CF ready"))
goto err_request_rdy;
if (gpio_request(VIPER_CF_POWER_GPIO, "CF power"))
goto err_request_pwr;
local_irq_save(flags);
/* GPIO 82 is the CF power enable line. initially off */
if (gpio_direction_output(VIPER_CF_POWER_GPIO, 0) ||
gpio_direction_input(VIPER_CF_CD_GPIO) ||
gpio_direction_input(VIPER_CF_RDY_GPIO)) {
local_irq_restore(flags);
goto err_dir;
}
local_irq_restore(flags);
return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
err_dir:
gpio_free(VIPER_CF_POWER_GPIO);
err_request_pwr:
gpio_free(VIPER_CF_RDY_GPIO);
err_request_rdy:
gpio_free(VIPER_CF_CD_GPIO);
err_request_cd:
printk(KERN_ERR "viper: Failed to setup PCMCIA GPIOs\n");
return -1;
}
/*
* Release all resources.
*/
static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
gpio_free(VIPER_CF_POWER_GPIO);
gpio_free(VIPER_CF_RDY_GPIO);
gpio_free(VIPER_CF_CD_GPIO);
}
static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->detect = gpio_get_value(VIPER_CF_CD_GPIO) ? 0 : 1;
state->ready = gpio_get_value(VIPER_CF_RDY_GPIO) ? 1 : 0;
state->bvd1 = 1;
state->bvd2 = 1;
state->wrprot = 0;
state->vs_3v = 1; /* Can only apply 3.3V */
state->vs_Xv = 0;
}
static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
/* Silently ignore Vpp, output enable, speaker enable. */
viper_cf_rst(state->flags & SS_RESET);
/* Apply socket voltage */
switch (state->Vcc) {
case 0:
gpio_set_value(VIPER_CF_POWER_GPIO, 0);
break;
case 33:
gpio_set_value(VIPER_CF_POWER_GPIO, 1);
break;
default:
printk(KERN_ERR "%s: Unsupported Vcc:%d\n",
__func__, state->Vcc);
return -1;
}
return 0;
}
static void viper_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
}
static void viper_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
}
static struct pcmcia_low_level viper_pcmcia_ops __initdata = {
.owner = THIS_MODULE,
.hw_init = viper_pcmcia_hw_init,
.hw_shutdown = viper_pcmcia_hw_shutdown,
.socket_state = viper_pcmcia_socket_state,
.configure_socket = viper_pcmcia_configure_socket,
.socket_init = viper_pcmcia_socket_init,
.socket_suspend = viper_pcmcia_socket_suspend,
.nr = 1,
};
static struct platform_device *viper_pcmcia_device;
static int __init viper_pcmcia_init(void)
{
int ret;
if (!machine_is_viper())
return -ENODEV;
viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!viper_pcmcia_device)
return -ENOMEM;
ret = platform_device_add_data(viper_pcmcia_device,
&viper_pcmcia_ops,
sizeof(viper_pcmcia_ops));
if (!ret)
ret = platform_device_add(viper_pcmcia_device);
if (ret)
platform_device_put(viper_pcmcia_device);
return ret;
}
static void __exit viper_pcmcia_exit(void)
{
platform_device_unregister(viper_pcmcia_device);
}
module_init(viper_pcmcia_init);
module_exit(viper_pcmcia_exit);
MODULE_LICENSE("GPL");
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