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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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91c39dcb73
fix reverse RDY gpios in PCMCIA driver Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
/*
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* linux/drivers/pcmcia/pxa/pxa_cm_x255.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Compulab Ltd., 2003, 2007, 2008
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* Mike Rapoport <mike@compulab.co.il>
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*
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*/
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#include <linux/platform_device.h>
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#include <linux/irq.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <asm/mach-types.h>
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#include "soc_common.h"
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#define GPIO_PCMCIA_SKTSEL (54)
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#define GPIO_PCMCIA_S0_CD_VALID (16)
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#define GPIO_PCMCIA_S1_CD_VALID (17)
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#define GPIO_PCMCIA_S0_RDYINT (6)
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#define GPIO_PCMCIA_S1_RDYINT (8)
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#define GPIO_PCMCIA_RESET (9)
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#define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID)
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#define PCMCIA_S1_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S1_CD_VALID)
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#define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT)
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#define PCMCIA_S1_RDYINT IRQ_GPIO(GPIO_PCMCIA_S1_RDYINT)
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static struct pcmcia_irqs irqs[] = {
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{ 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
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{ 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" },
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};
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static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
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if (ret)
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return ret;
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gpio_direction_output(GPIO_PCMCIA_RESET, 0);
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skt->irq = skt->nr == 0 ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT;
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ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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if (!ret)
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gpio_free(GPIO_PCMCIA_RESET);
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return ret;
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}
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static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
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gpio_free(GPIO_PCMCIA_RESET);
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}
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static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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struct pcmcia_state *state)
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{
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int cd = skt->nr ? GPIO_PCMCIA_S1_CD_VALID : GPIO_PCMCIA_S0_CD_VALID;
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int rdy = skt->nr ? GPIO_PCMCIA_S1_RDYINT : GPIO_PCMCIA_S0_RDYINT;
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state->detect = !gpio_get_value(cd);
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state->ready = !!gpio_get_value(rdy);
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state->bvd1 = 1;
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state->bvd2 = 1;
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state->vs_3v = 0;
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state->vs_Xv = 0;
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state->wrprot = 0; /* not available */
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}
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static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
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const socket_state_t *state)
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{
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switch (skt->nr) {
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case 0:
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if (state->flags & SS_RESET) {
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gpio_set_value(GPIO_PCMCIA_SKTSEL, 0);
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udelay(1);
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gpio_set_value(GPIO_PCMCIA_RESET, 1);
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udelay(10);
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gpio_set_value(GPIO_PCMCIA_RESET, 0);
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}
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break;
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case 1:
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if (state->flags & SS_RESET) {
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gpio_set_value(GPIO_PCMCIA_SKTSEL, 1);
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udelay(1);
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gpio_set_value(GPIO_PCMCIA_RESET, 1);
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udelay(10);
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gpio_set_value(GPIO_PCMCIA_RESET, 0);
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}
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break;
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}
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return 0;
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}
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static void cmx255_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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}
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static void cmx255_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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}
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static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = {
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.owner = THIS_MODULE,
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.hw_init = cmx255_pcmcia_hw_init,
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.hw_shutdown = cmx255_pcmcia_shutdown,
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.socket_state = cmx255_pcmcia_socket_state,
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.configure_socket = cmx255_pcmcia_configure_socket,
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.socket_init = cmx255_pcmcia_socket_init,
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.socket_suspend = cmx255_pcmcia_socket_suspend,
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.nr = 1,
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};
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static struct platform_device *cmx255_pcmcia_device;
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int __init cmx255_pcmcia_init(void)
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{
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int ret;
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cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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if (!cmx255_pcmcia_device)
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return -ENOMEM;
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ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops,
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sizeof(cmx255_pcmcia_ops));
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if (ret == 0) {
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printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n");
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ret = platform_device_add(cmx255_pcmcia_device);
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}
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if (ret)
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platform_device_put(cmx255_pcmcia_device);
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return ret;
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}
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void __exit cmx255_pcmcia_exit(void)
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{
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platform_device_unregister(cmx255_pcmcia_device);
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}
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