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/*
* linux/drivers/pcmcia/pxa2xx_trizeps4.c
*
* TRIZEPS PCMCIA specific routines.
*
* Author: Jürgen Schindele
* Created: 20 02, 2006
* Copyright: Jürgen Schindele
*
* 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/init.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <mach/pxa2xx-regs.h>
#include <mach/trizeps4.h>
#include "soc_common.h"
extern void board_pcmcia_power(int power);
static struct pcmcia_irqs irqs[] = {
{ 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }
/* on other baseboards we can have more inputs */
};
static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
int ret, i;
/* we dont have voltage/card/ready detection
* so we dont need interrupts for it
*/
switch (skt->nr) {
case 0:
if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
pr_err("%s: sock %d unable to request gpio %d\n", __func__,
skt->nr, GPIO_PRDY);
return -EBUSY;
}
if (gpio_direction_input(GPIO_PRDY) < 0) {
pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
skt->nr, GPIO_PRDY);
gpio_free(GPIO_PRDY);
return -EINVAL;
}
skt->socket.pci_irq = IRQ_GPIO(GPIO_PRDY);
break;
default:
break;
}
/* release the reset of this card */
pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
/* supplementory irqs for the socket */
for (i = 0; i < ARRAY_SIZE(irqs); i++) {
if (irqs[i].sock != skt->nr)
continue;
if (gpio_request(irq_to_gpio(irqs[i].irq), irqs[i].str) < 0) {
pr_err("%s: sock %d unable to request gpio %d\n",
__func__, skt->nr, irq_to_gpio(irqs[i].irq));
ret = -EBUSY;
goto error;
}
if (gpio_direction_input(irq_to_gpio(irqs[i].irq)) < 0) {
pr_err("%s: sock %d unable to set input gpio %d\n",
__func__, skt->nr, irq_to_gpio(irqs[i].irq));
ret = -EINVAL;
goto error;
}
}
return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
error:
for (; i >= 0; i--) {
gpio_free(irq_to_gpio(irqs[i].irq));
}
return (ret);
}
static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
int i;
/* free allocated gpio's */
gpio_free(GPIO_PRDY);
for (i = 0; i < ARRAY_SIZE(irqs); i++)
gpio_free(irq_to_gpio(irqs[i].irq));
}
static unsigned long trizeps_pcmcia_status[2];
static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
unsigned short status = 0, change;
status = CFSR_readw();
change = (status ^ trizeps_pcmcia_status[skt->nr]) &
ConXS_CFSR_BVD_MASK;
if (change) {
trizeps_pcmcia_status[skt->nr] = status;
if (status & ConXS_CFSR_BVD1) {
/* enable_irq empty */
} else {
/* disable_irq empty */
}
}
switch (skt->nr) {
case 0:
/* just fill in fix states */
state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
state->ready = gpio_get_value(GPIO_PRDY) ? 1 : 0;
state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
state->wrprot = 0; /* not available */
break;
#ifndef CONFIG_MACH_TRIZEPS_CONXS
/* on ConXS we only have one slot. Second is inactive */
case 1:
state->detect = 0;
state->ready = 0;
state->bvd1 = 0;
state->bvd2 = 0;
state->vs_3v = 0;
state->vs_Xv = 0;
state->wrprot = 0;
break;
#endif
}
}
static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
int ret = 0;
unsigned short power = 0;
/* we do nothing here just check a bit */
switch (state->Vcc) {
case 0: power &= 0xfc; break;
case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
case 50:
pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
break;
default:
pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
ret = -1;
}
switch (state->Vpp) {
case 0: power &= 0xf3; break;
case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
case 120:
pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
break;
default:
if (state->Vpp != state->Vcc) {
pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
ret = -1;
}
}
switch (skt->nr) {
case 0: /* we only have 3.3V */
board_pcmcia_power(power);
break;
#ifndef CONFIG_MACH_TRIZEPS_CONXS
/* on ConXS we only have one slot. Second is inactive */
case 1:
#endif
default:
break;
}
return ret;
}
static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
/* default is on */
board_pcmcia_power(0x9);
}
static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
board_pcmcia_power(0x0);
}
static struct pcmcia_low_level trizeps_pcmcia_ops = {
.owner = THIS_MODULE,
.hw_init = trizeps_pcmcia_hw_init,
.hw_shutdown = trizeps_pcmcia_hw_shutdown,
.socket_state = trizeps_pcmcia_socket_state,
.configure_socket = trizeps_pcmcia_configure_socket,
.socket_init = trizeps_pcmcia_socket_init,
.socket_suspend = trizeps_pcmcia_socket_suspend,
#ifdef CONFIG_MACH_TRIZEPS_CONXS
.nr = 1,
#else
.nr = 2,
#endif
.first = 0,
};
static struct platform_device *trizeps_pcmcia_device;
static int __init trizeps_pcmcia_init(void)
{
int ret;
if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
return -ENODEV;
trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!trizeps_pcmcia_device)
return -ENOMEM;
ret = platform_device_add_data(trizeps_pcmcia_device,
&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
if (ret == 0)
ret = platform_device_add(trizeps_pcmcia_device);
if (ret)
platform_device_put(trizeps_pcmcia_device);
return ret;
}
static void __exit trizeps_pcmcia_exit(void)
{
platform_device_unregister(trizeps_pcmcia_device);
}
fs_initcall(trizeps_pcmcia_init);
module_exit(trizeps_pcmcia_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Juergen Schindele");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
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