122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/*
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* Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.com>
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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/platform_device.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/irq.h>
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#include <asm/mach-types.h>
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#include <mach/hx4700.h>
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#include "soc_common.h"
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static struct gpio gpios[] = {
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{ GPIO114_HX4700_CF_RESET, GPIOF_OUT_INIT_LOW, "CF reset" },
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{ EGPIO4_CF_3V3_ON, GPIOF_OUT_INIT_LOW, "CF 3.3V enable" },
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};
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static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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int ret;
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ret = gpio_request_array(gpios, ARRAY_SIZE(gpios));
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if (ret)
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goto out;
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/*
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* IRQ type must be set before soc_pcmcia_hw_init() calls request_irq().
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* The asic3 default IRQ type is level trigger low level detect, exactly
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* the the signal present on GPIOD4_CF_nCD when a CF card is inserted.
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* If the IRQ type is not changed, the asic3 interrupt handler will loop
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* repeatedly because it is unable to clear the level trigger interrupt.
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*/
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irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH);
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skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD;
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skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
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skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB;
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skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
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out:
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return ret;
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}
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static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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gpio_free_array(gpios, ARRAY_SIZE(gpios));
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}
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static void hx4700_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->vs_3v = 1;
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state->vs_Xv = 0;
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}
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static int hx4700_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 (state->Vcc) {
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case 0:
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gpio_set_value(EGPIO4_CF_3V3_ON, 0);
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break;
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case 33:
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gpio_set_value(EGPIO4_CF_3V3_ON, 1);
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break;
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default:
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printk(KERN_ERR "pcmcia: Unsupported Vcc: %d\n", state->Vcc);
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return -EINVAL;
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}
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gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0);
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return 0;
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}
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static struct pcmcia_low_level hx4700_pcmcia_ops = {
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.owner = THIS_MODULE,
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.nr = 1,
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.hw_init = hx4700_pcmcia_hw_init,
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.hw_shutdown = hx4700_pcmcia_hw_shutdown,
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.socket_state = hx4700_pcmcia_socket_state,
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.configure_socket = hx4700_pcmcia_configure_socket,
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};
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static struct platform_device *hx4700_pcmcia_device;
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static int __init hx4700_pcmcia_init(void)
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{
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struct platform_device *pdev;
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if (!machine_is_h4700())
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return -ENODEV;
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pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1,
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&hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops));
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if (IS_ERR(pdev))
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return PTR_ERR(pdev);
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hx4700_pcmcia_device = pdev;
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return 0;
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}
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static void __exit hx4700_pcmcia_exit(void)
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{
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platform_device_unregister(hx4700_pcmcia_device);
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}
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module_init(hx4700_pcmcia_init);
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module_exit(hx4700_pcmcia_exit);
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MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>");
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MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver");
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MODULE_LICENSE("GPL");
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