[ARM] pxa: Palm Tungsten|C PCMCIA support
This patch adds support for PCMCIA socket found in Palm Tungsten|C.
There is Prism3 based WiFi card hardwired to that socket.
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index 047394d..3247828 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -71,6 +71,7 @@
pxa2xx-obj-$(CONFIG_ARCH_VIPER) += pxa2xx_viper.o
pxa2xx-obj-$(CONFIG_TRIZEPS_PCMCIA) += pxa2xx_trizeps4.o
pxa2xx-obj-$(CONFIG_MACH_PALMTX) += pxa2xx_palmtx.o
+pxa2xx-obj-$(CONFIG_MACH_PALMTC) += pxa2xx_palmtc.o
pxa2xx-obj-$(CONFIG_MACH_PALMLD) += pxa2xx_palmld.o
pxa2xx-obj-$(CONFIG_MACH_E740) += pxa2xx_e740.o
pxa2xx-obj-$(CONFIG_MACH_STARGATE2) += pxa2xx_stargate2.o
diff --git a/drivers/pcmcia/pxa2xx_palmtc.c b/drivers/pcmcia/pxa2xx_palmtc.c
new file mode 100644
index 0000000..2c29507
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_palmtc.c
@@ -0,0 +1,230 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_palmtc.c
+ *
+ * Driver for Palm Tungsten|C PCMCIA
+ *
+ * Copyright (C) 2008 Alex Osborne <ato@meshy.org>
+ * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+
+#include <asm/mach-types.h>
+#include <mach/palmtc.h>
+#include "soc_common.h"
+
+static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ int ret;
+
+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER1, "PCMCIA PWR1");
+ if (ret)
+ goto err1;
+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER1, 0);
+ if (ret)
+ goto err2;
+
+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER2, "PCMCIA PWR2");
+ if (ret)
+ goto err2;
+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER2, 0);
+ if (ret)
+ goto err3;
+
+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER3, "PCMCIA PWR3");
+ if (ret)
+ goto err3;
+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER3, 0);
+ if (ret)
+ goto err4;
+
+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_RESET, "PCMCIA RST");
+ if (ret)
+ goto err4;
+ ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
+ if (ret)
+ goto err5;
+
+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_READY, "PCMCIA RDY");
+ if (ret)
+ goto err5;
+ ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_READY);
+ if (ret)
+ goto err6;
+
+ ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_PWRREADY, "PCMCIA PWRRDY");
+ if (ret)
+ goto err6;
+ ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_PWRREADY);
+ if (ret)
+ goto err7;
+
+ skt->irq = IRQ_GPIO(GPIO_NR_PALMTC_PCMCIA_READY);
+ return 0;
+
+err7:
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY);
+err6:
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_READY);
+err5:
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET);
+err4:
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3);
+err3:
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2);
+err2:
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1);
+err1:
+ return ret;
+}
+
+static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY);
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_READY);
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET);
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3);
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2);
+ gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1);
+}
+
+static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+ struct pcmcia_state *state)
+{
+ state->detect = 1; /* always inserted */
+ state->ready = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY);
+ state->bvd1 = 1;
+ state->bvd2 = 1;
+ state->wrprot = 0;
+ state->vs_3v = 1;
+ state->vs_Xv = 0;
+}
+
+static int palmtc_wifi_powerdown(void)
+{
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0);
+ mdelay(40);
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0);
+ return 0;
+}
+
+static int palmtc_wifi_powerup(void)
+{
+ int timeout = 50;
+
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1);
+ mdelay(50);
+
+ /* Power up the card, 1.8V first, after a while 3.3V */
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1);
+ mdelay(100);
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1);
+
+ /* Wait till the card is ready */
+ while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) &&
+ timeout) {
+ mdelay(1);
+ timeout--;
+ }
+
+ /* Power down the WiFi in case of error */
+ if (!timeout) {
+ palmtc_wifi_powerdown();
+ return 1;
+ }
+
+ /* Reset the card */
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
+ mdelay(20);
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0);
+ mdelay(25);
+
+ gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0);
+
+ return 0;
+}
+
+static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ int ret;
+
+ if (state->Vcc == 0)
+ ret = palmtc_wifi_powerdown();
+ else if (state->Vcc == 33)
+ ret = palmtc_wifi_powerup();
+
+ return ret;
+}
+
+static void palmtc_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+}
+
+static void palmtc_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+}
+
+static struct pcmcia_low_level palmtc_pcmcia_ops = {
+ .owner = THIS_MODULE,
+
+ .first = 0,
+ .nr = 1,
+
+ .hw_init = palmtc_pcmcia_hw_init,
+ .hw_shutdown = palmtc_pcmcia_hw_shutdown,
+
+ .socket_state = palmtc_pcmcia_socket_state,
+ .configure_socket = palmtc_pcmcia_configure_socket,
+
+ .socket_init = palmtc_pcmcia_socket_init,
+ .socket_suspend = palmtc_pcmcia_socket_suspend,
+};
+
+static struct platform_device *palmtc_pcmcia_device;
+
+static int __init palmtc_pcmcia_init(void)
+{
+ int ret;
+
+ if (!machine_is_palmtc())
+ return -ENODEV;
+
+ palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+ if (!palmtc_pcmcia_device)
+ return -ENOMEM;
+
+ ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops,
+ sizeof(palmtc_pcmcia_ops));
+
+ if (!ret)
+ ret = platform_device_add(palmtc_pcmcia_device);
+
+ if (ret)
+ platform_device_put(palmtc_pcmcia_device);
+
+ return ret;
+}
+
+static void __exit palmtc_pcmcia_exit(void)
+{
+ platform_device_unregister(palmtc_pcmcia_device);
+}
+
+module_init(palmtc_pcmcia_init);
+module_exit(palmtc_pcmcia_exit);
+
+MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
+ " Marek Vasut <marek.vasut@gmail.com>");
+MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");
+MODULE_LICENSE("GPL");