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+/*
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+ * linux/drivers/pcmcia/pxa2xx_palmtc.c
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+ *
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+ * Driver for Palm Tungsten|C PCMCIA
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+ *
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+ * Copyright (C) 2008 Alex Osborne <ato@meshy.org>
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+ * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.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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+ */
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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/gpio.h>
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+#include <linux/delay.h>
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+
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+#include <asm/mach-types.h>
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+#include <mach/palmtc.h>
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+#include "soc_common.h"
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+
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+static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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+{
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+ int ret;
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+
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+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER1, "PCMCIA PWR1");
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+ if (ret)
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+ goto err1;
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+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER1, 0);
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+ if (ret)
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+ goto err2;
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+
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+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER2, "PCMCIA PWR2");
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+ if (ret)
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+ goto err2;
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+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER2, 0);
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+ if (ret)
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+ goto err3;
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+
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+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER3, "PCMCIA PWR3");
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+ if (ret)
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+ goto err3;
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+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER3, 0);
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+ if (ret)
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+ goto err4;
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+
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+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_RESET, "PCMCIA RST");
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+ if (ret)
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+ goto err4;
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+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
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+ if (ret)
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+ goto err5;
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+
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+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_READY, "PCMCIA RDY");
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+ if (ret)
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+ goto err5;
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+ ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_READY);
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+ if (ret)
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+ goto err6;
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+
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+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_PWRREADY, "PCMCIA PWRRDY");
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+ if (ret)
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+ goto err6;
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+ ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_PWRREADY);
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+ if (ret)
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+ goto err7;
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+
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+ skt->irq = IRQ_GPIO(GPIO_NR_PALMTC_PCMCIA_READY);
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+ return 0;
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+
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+err7:
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY);
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+err6:
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_READY);
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+err5:
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET);
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+err4:
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3);
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+err3:
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2);
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+err2:
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1);
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+err1:
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+ return ret;
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+}
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+
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+static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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+{
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY);
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_READY);
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET);
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3);
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2);
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+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1);
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+}
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+
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+static void palmtc_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 = 1; /* always inserted */
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+ state->ready = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY);
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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;
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+ state->vs_Xv = 0;
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+}
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+
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+static int palmtc_wifi_powerdown(void)
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+{
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0);
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+ mdelay(40);
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0);
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+ return 0;
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+}
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+
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+static int palmtc_wifi_powerup(void)
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+{
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+ int timeout = 50;
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+
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1);
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+ mdelay(50);
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+
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+ /* Power up the card, 1.8V first, after a while 3.3V */
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1);
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+ mdelay(100);
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1);
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+
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+ /* Wait till the card is ready */
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+ while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) &&
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+ timeout) {
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+ mdelay(1);
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+ timeout--;
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+ }
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+
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+ /* Power down the WiFi in case of error */
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+ if (!timeout) {
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+ palmtc_wifi_powerdown();
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+ return 1;
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+ }
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+
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+ /* Reset the card */
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
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+ mdelay(20);
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0);
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+ mdelay(25);
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+
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+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0);
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+
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+ return 0;
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+}
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+
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+static int palmtc_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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+ int ret;
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+
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+ if (state->Vcc == 0)
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+ ret = palmtc_wifi_powerdown();
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+ else if (state->Vcc == 33)
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+ ret = palmtc_wifi_powerup();
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+
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+ return ret;
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+}
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+
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+static void palmtc_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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+{
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+}
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+
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+static void palmtc_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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+{
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+}
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+
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+static struct pcmcia_low_level palmtc_pcmcia_ops = {
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+ .owner = THIS_MODULE,
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+
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+ .first = 0,
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+ .nr = 1,
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+
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+ .hw_init = palmtc_pcmcia_hw_init,
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+ .hw_shutdown = palmtc_pcmcia_hw_shutdown,
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+
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+ .socket_state = palmtc_pcmcia_socket_state,
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+ .configure_socket = palmtc_pcmcia_configure_socket,
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+
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+ .socket_init = palmtc_pcmcia_socket_init,
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+ .socket_suspend = palmtc_pcmcia_socket_suspend,
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+};
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+
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+static struct platform_device *palmtc_pcmcia_device;
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+
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+static int __init palmtc_pcmcia_init(void)
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+{
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+ int ret;
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+
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+ if (!machine_is_palmtc())
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+ return -ENODEV;
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+
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+ palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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+ if (!palmtc_pcmcia_device)
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+ return -ENOMEM;
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+
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+ ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops,
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+ sizeof(palmtc_pcmcia_ops));
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+
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+ if (!ret)
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+ ret = platform_device_add(palmtc_pcmcia_device);
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+
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+ if (ret)
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+ platform_device_put(palmtc_pcmcia_device);
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+
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+ return ret;
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+}
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+
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+static void __exit palmtc_pcmcia_exit(void)
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+{
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+ platform_device_unregister(palmtc_pcmcia_device);
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+}
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+
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+module_init(palmtc_pcmcia_init);
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+module_exit(palmtc_pcmcia_exit);
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+
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+MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
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+ " Marek Vasut <marek.vasut@gmail.com>");
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+MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C");
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+MODULE_ALIAS("platform:pxa2xx-pcmcia");
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+MODULE_LICENSE("GPL");
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