pxa2xx_viper.c
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/*
* Viper/Zeus PCMCIA support
* Copyright 2004 Arcom Control Systems
*
* Maintained by Marc Zyngier <maz@misterjones.org>
*
* 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 <linux/platform_data/pcmcia-pxa2xx_viper.h>
#include "soc_common.h"
#include "pxa2xx_base.h"
static struct platform_device *arcom_pcmcia_dev;
static inline struct arcom_pcmcia_pdata *viper_get_pdata(void)
{
return arcom_pcmcia_dev->dev.platform_data;
}
static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
unsigned long flags;
skt->stat[SOC_STAT_CD].gpio = pdata->cd_gpio;
skt->stat[SOC_STAT_CD].name = "PCMCIA_CD";
skt->stat[SOC_STAT_RDY].gpio = pdata->rdy_gpio;
skt->stat[SOC_STAT_RDY].name = "CF ready";
if (gpio_request(pdata->pwr_gpio, "CF power"))
goto err_request_pwr;
local_irq_save(flags);
if (gpio_direction_output(pdata->pwr_gpio, 0)) {
local_irq_restore(flags);
goto err_dir;
}
local_irq_restore(flags);
return 0;
err_dir:
gpio_free(pdata->pwr_gpio);
err_request_pwr:
dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs\n");
return -1;
}
/*
* Release all resources.
*/
static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
gpio_free(pdata->pwr_gpio);
}
static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
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)
{
struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
/* Silently ignore Vpp, output enable, speaker enable. */
pdata->reset(state->flags & SS_RESET);
/* Apply socket voltage */
switch (state->Vcc) {
case 0:
gpio_set_value(pdata->pwr_gpio, 0);
break;
case 33:
gpio_set_value(pdata->pwr_gpio, 1);
break;
default:
dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d\n", state->Vcc);
return -1;
}
return 0;
}
static struct pcmcia_low_level viper_pcmcia_ops = {
.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,
.nr = 1,
};
static struct platform_device *viper_pcmcia_device;
static int viper_pcmcia_probe(struct platform_device *pdev)
{
int ret;
/* I can't imagine more than one device, but you never know... */
if (arcom_pcmcia_dev)
return -EEXIST;
if (!pdev->dev.platform_data)
return -EINVAL;
viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!viper_pcmcia_device)
return -ENOMEM;
arcom_pcmcia_dev = pdev;
viper_pcmcia_device->dev.parent = &pdev->dev;
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);
arcom_pcmcia_dev = NULL;
}
return ret;
}
static int viper_pcmcia_remove(struct platform_device *pdev)
{
platform_device_unregister(viper_pcmcia_device);
arcom_pcmcia_dev = NULL;
return 0;
}
static struct platform_device_id viper_pcmcia_id_table[] = {
{ .name = "viper-pcmcia", },
{ .name = "zeus-pcmcia", },
{ },
};
static struct platform_driver viper_pcmcia_driver = {
.probe = viper_pcmcia_probe,
.remove = viper_pcmcia_remove,
.driver = {
.name = "arcom-pcmcia",
},
.id_table = viper_pcmcia_id_table,
};
module_platform_driver(viper_pcmcia_driver);
MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table);
MODULE_LICENSE("GPL");