119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.com>
|
|
*/
|
|
|
|
#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\n", 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");
|