5113f6f70
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kernel add
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/*
* Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.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/err.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <asm/mach-types.h>
#include <mach/hx4700.h>
#include "soc_common.h"
static struct gpio gpios[] = {
{ GPIO114_HX4700_CF_RESET, GPIOF_OUT_INIT_LOW, "CF reset" },
{ EGPIO4_CF_3V3_ON, GPIOF_OUT_INIT_LOW, "CF 3.3V enable" },
};
static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
int ret;
ret = gpio_request_array(gpios, ARRAY_SIZE(gpios));
if (ret)
goto out;
/*
* IRQ type must be set before soc_pcmcia_hw_init() calls request_irq().
* The asic3 default IRQ type is level trigger low level detect, exactly
* the the signal present on GPIOD4_CF_nCD when a CF card is inserted.
* If the IRQ type is not changed, the asic3 interrupt handler will loop
* repeatedly because it is unable to clear the level trigger interrupt.
*/
irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH);
skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD;
skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB;
skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
out:
return ret;
}
static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
gpio_free_array(gpios, ARRAY_SIZE(gpios));
}
static void hx4700_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->vs_3v = 1;
state->vs_Xv = 0;
}
static int hx4700_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
switch (state->Vcc) {
case 0:
gpio_set_value(EGPIO4_CF_3V3_ON, 0);
break;
case 33:
gpio_set_value(EGPIO4_CF_3V3_ON, 1);
break;
default:
printk(KERN_ERR "pcmcia: Unsupported Vcc: %d
", state->Vcc);
return -EINVAL;
}
gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0);
return 0;
}
static struct pcmcia_low_level hx4700_pcmcia_ops = {
.owner = THIS_MODULE,
.nr = 1,
.hw_init = hx4700_pcmcia_hw_init,
.hw_shutdown = hx4700_pcmcia_hw_shutdown,
.socket_state = hx4700_pcmcia_socket_state,
.configure_socket = hx4700_pcmcia_configure_socket,
};
static struct platform_device *hx4700_pcmcia_device;
static int __init hx4700_pcmcia_init(void)
{
struct platform_device *pdev;
if (!machine_is_h4700())
return -ENODEV;
pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1,
&hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops));
if (IS_ERR(pdev))
return PTR_ERR(pdev);
hx4700_pcmcia_device = pdev;
return 0;
}
static void __exit hx4700_pcmcia_exit(void)
{
platform_device_unregister(hx4700_pcmcia_device);
}
module_init(hx4700_pcmcia_init);
module_exit(hx4700_pcmcia_exit);
MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>");
MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver");
MODULE_LICENSE("GPL");
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