179 lines
4.1 KiB
C
179 lines
4.1 KiB
C
/*
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* VIPER PCMCIA support
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* Copyright 2004 Arcom Control Systems
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*
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* Maintained by Marc Zyngier <maz@misterjones.org>
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* <marc.zyngier@altran.com>
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*
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* Based on:
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* iPAQ h2200 PCMCIA support
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* Copyright 2004 Koen Kooi <koen@vestingbar.nl>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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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/errno.h>
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#include <linux/interrupt.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 <mach/viper.h>
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#include <asm/mach-types.h>
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#include "soc_common.h"
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#include "pxa2xx_base.h"
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static struct pcmcia_irqs irqs[] = {
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{ 0, gpio_to_irq(VIPER_CF_CD_GPIO), "PCMCIA_CD" }
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};
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static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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unsigned long flags;
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skt->irq = gpio_to_irq(VIPER_CF_RDY_GPIO);
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if (gpio_request(VIPER_CF_CD_GPIO, "CF detect"))
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goto err_request_cd;
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if (gpio_request(VIPER_CF_RDY_GPIO, "CF ready"))
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goto err_request_rdy;
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if (gpio_request(VIPER_CF_POWER_GPIO, "CF power"))
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goto err_request_pwr;
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local_irq_save(flags);
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/* GPIO 82 is the CF power enable line. initially off */
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if (gpio_direction_output(VIPER_CF_POWER_GPIO, 0) ||
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gpio_direction_input(VIPER_CF_CD_GPIO) ||
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gpio_direction_input(VIPER_CF_RDY_GPIO)) {
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local_irq_restore(flags);
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goto err_dir;
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}
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local_irq_restore(flags);
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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err_dir:
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gpio_free(VIPER_CF_POWER_GPIO);
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err_request_pwr:
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gpio_free(VIPER_CF_RDY_GPIO);
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err_request_rdy:
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gpio_free(VIPER_CF_CD_GPIO);
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err_request_cd:
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printk(KERN_ERR "viper: Failed to setup PCMCIA GPIOs\n");
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return -1;
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}
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/*
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* Release all resources.
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*/
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static void viper_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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gpio_free(VIPER_CF_POWER_GPIO);
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gpio_free(VIPER_CF_RDY_GPIO);
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gpio_free(VIPER_CF_CD_GPIO);
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}
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static void viper_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(VIPER_CF_CD_GPIO) ? 0 : 1;
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state->ready = gpio_get_value(VIPER_CF_RDY_GPIO) ? 1 : 0;
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state->bvd1 = 1;
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state->bvd2 = 1;
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state->wrprot = 0;
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state->vs_3v = 1; /* Can only apply 3.3V */
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state->vs_Xv = 0;
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}
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static int viper_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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/* Silently ignore Vpp, output enable, speaker enable. */
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viper_cf_rst(state->flags & SS_RESET);
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/* Apply socket voltage */
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switch (state->Vcc) {
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case 0:
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gpio_set_value(VIPER_CF_POWER_GPIO, 0);
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break;
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case 33:
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gpio_set_value(VIPER_CF_POWER_GPIO, 1);
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break;
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default:
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printk(KERN_ERR "%s: Unsupported Vcc:%d\n",
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__func__, state->Vcc);
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return -1;
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}
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return 0;
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}
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static void viper_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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}
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static void viper_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 viper_pcmcia_ops __initdata = {
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.owner = THIS_MODULE,
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.hw_init = viper_pcmcia_hw_init,
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.hw_shutdown = viper_pcmcia_hw_shutdown,
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.socket_state = viper_pcmcia_socket_state,
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.configure_socket = viper_pcmcia_configure_socket,
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.socket_init = viper_pcmcia_socket_init,
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.socket_suspend = viper_pcmcia_socket_suspend,
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.nr = 1,
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};
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static struct platform_device *viper_pcmcia_device;
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static int __init viper_pcmcia_init(void)
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{
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int ret;
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if (!machine_is_viper())
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return -ENODEV;
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viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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if (!viper_pcmcia_device)
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return -ENOMEM;
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ret = platform_device_add_data(viper_pcmcia_device,
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&viper_pcmcia_ops,
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sizeof(viper_pcmcia_ops));
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if (!ret)
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ret = platform_device_add(viper_pcmcia_device);
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if (ret)
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platform_device_put(viper_pcmcia_device);
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return ret;
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}
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static void __exit viper_pcmcia_exit(void)
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{
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platform_device_unregister(viper_pcmcia_device);
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}
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module_init(viper_pcmcia_init);
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module_exit(viper_pcmcia_exit);
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MODULE_LICENSE("GPL");
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