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// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/drivers/pcmcia/pxa2xx_mainstone.c
*
* Mainstone PCMCIA specific routines.
*
* Created: May 12, 2004
* Author: Nicolas Pitre
* Copyright: MontaVista Software Inc.
*/
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <pcmcia/ss.h>
#include <asm/mach-types.h>
#include "soc_common.h"
#include "max1600.h"
static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
struct device *dev = skt->socket.dev.parent;
struct max1600 *m;
int ret;
skt->stat[SOC_STAT_CD].name = skt->nr ? "bdetect" : "adetect";
skt->stat[SOC_STAT_BVD1].name = skt->nr ? "bbvd1" : "abvd1";
skt->stat[SOC_STAT_BVD2].name = skt->nr ? "bbvd2" : "abvd2";
skt->stat[SOC_STAT_RDY].name = skt->nr ? "bready" : "aready";
skt->stat[SOC_STAT_VS1].name = skt->nr ? "bvs1" : "avs1";
skt->stat[SOC_STAT_VS2].name = skt->nr ? "bvs2" : "avs2";
skt->gpio_reset = devm_gpiod_get(dev, skt->nr ? "breset" : "areset",
GPIOD_OUT_HIGH);
if (IS_ERR(skt->gpio_reset))
return PTR_ERR(skt->gpio_reset);
ret = max1600_init(dev, &m, skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
MAX1600_CODE_HIGH);
if (ret)
return ret;
skt->driver_data = m;
return soc_pcmcia_request_gpiods(skt);
}
static unsigned int mst_pcmcia_bvd1_status[2];
static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
unsigned int flip = mst_pcmcia_bvd1_status[skt->nr] ^ state->bvd1;
/*
* Workaround for STSCHG which can't be deasserted:
* We therefore disable/enable corresponding IRQs
* as needed to avoid IRQ locks.
*/
if (flip) {
mst_pcmcia_bvd1_status[skt->nr] = state->bvd1;
if (state->bvd1)
enable_irq(skt->stat[SOC_STAT_BVD1].irq);
else
disable_irq(skt->stat[SOC_STAT_BVD2].irq);
}
}
static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
return max1600_configure(skt->driver_data, state->Vcc, state->Vpp);
}
static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
.owner = THIS_MODULE,
.hw_init = mst_pcmcia_hw_init,
.socket_state = mst_pcmcia_socket_state,
.configure_socket = mst_pcmcia_configure_socket,
.nr = 2,
};
static struct platform_device *mst_pcmcia_device;
static int __init mst_pcmcia_init(void)
{
int ret;
if (!machine_is_mainstone())
return -ENODEV;
mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!mst_pcmcia_device)
return -ENOMEM;
ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
sizeof(mst_pcmcia_ops));
if (ret == 0)
ret = platform_device_add(mst_pcmcia_device);
if (ret)
platform_device_put(mst_pcmcia_device);
return ret;
}
static void __exit mst_pcmcia_exit(void)
{
platform_device_unregister(mst_pcmcia_device);
}
fs_initcall(mst_pcmcia_init);
module_exit(mst_pcmcia_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
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