163 строки
4.0 KiB
C
163 строки
4.0 KiB
C
/*
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* linux/drivers/pcmcia/pxa2xx_stargate2.c
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*
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* Stargate 2 PCMCIA specific routines.
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*
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* Created: December 6, 2005
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* Author: Ed C. Epp
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* Copyright: Intel Corp 2005
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* Jonathan Cameron <jic23@cam.ac.uk> 2009
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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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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <pcmcia/ss.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include "soc_common.h"
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#define SG2_S0_POWER_CTL 108
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#define SG2_S0_GPIO_RESET 82
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#define SG2_S0_GPIO_DETECT 53
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#define SG2_S0_GPIO_READY 81
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static struct pcmcia_irqs irqs[] = {
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{ 0, IRQ_GPIO(SG2_S0_GPIO_DETECT), "PCMCIA0 CD" },
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};
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static struct gpio sg2_pcmcia_gpios[] = {
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{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
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{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
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};
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static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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skt->socket.pci_irq = IRQ_GPIO(SG2_S0_GPIO_READY);
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void sg2_pcmcia_hw_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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}
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static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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struct pcmcia_state *state)
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{
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state->detect = !gpio_get_value(SG2_S0_GPIO_DETECT);
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state->ready = !!gpio_get_value(SG2_S0_GPIO_READY);
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state->bvd1 = 0; /* not available - battery detect on card */
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state->bvd2 = 0; /* not available */
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state->vs_3v = 1; /* not available - voltage detect for card */
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state->vs_Xv = 0; /* not available */
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state->wrprot = 0; /* not available - write protect */
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}
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static int sg2_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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/* Enable card power */
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switch (state->Vcc) {
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case 0:
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/* sets power ctl register high */
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gpio_set_value(SG2_S0_POWER_CTL, 1);
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break;
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case 33:
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case 50:
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/* sets power control register low (clear) */
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gpio_set_value(SG2_S0_POWER_CTL, 0);
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msleep(100);
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break;
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default:
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pr_err("%s(): bad Vcc %u\n",
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__func__, state->Vcc);
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return -1;
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}
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/* reset */
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gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
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return 0;
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}
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static void sg2_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void sg2_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
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.owner = THIS_MODULE,
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.hw_init = sg2_pcmcia_hw_init,
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.hw_shutdown = sg2_pcmcia_hw_shutdown,
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.socket_state = sg2_pcmcia_socket_state,
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.configure_socket = sg2_pcmcia_configure_socket,
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.socket_init = sg2_pcmcia_socket_init,
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.socket_suspend = sg2_pcmcia_socket_suspend,
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.nr = 1,
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};
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static struct platform_device *sg2_pcmcia_device;
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static int __init sg2_pcmcia_init(void)
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{
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int ret;
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if (!machine_is_stargate2())
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return -ENODEV;
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sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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if (!sg2_pcmcia_device)
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return -ENOMEM;
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ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
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if (ret)
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goto error_put_platform_device;
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ret = platform_device_add_data(sg2_pcmcia_device,
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&sg2_pcmcia_ops,
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sizeof(sg2_pcmcia_ops));
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if (ret)
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goto error_free_gpios;
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ret = platform_device_add(sg2_pcmcia_device);
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if (ret)
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goto error_free_gpios;
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return 0;
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error_free_gpios:
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gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
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error_put_platform_device:
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platform_device_put(sg2_pcmcia_device);
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return ret;
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}
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static void __exit sg2_pcmcia_exit(void)
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{
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platform_device_unregister(sg2_pcmcia_device);
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gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
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}
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fs_initcall(sg2_pcmcia_init);
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module_exit(sg2_pcmcia_exit);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pxa2xx-pcmcia");
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