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authorPaul Parsons <lost.distance@yahoo.com>2012-05-06 01:09:19 +0100
committerHaojian Zhuang <haojian.zhuang@gmail.com>2012-05-07 09:56:39 +0800
commit95244306f6fb4f685dd8a672a6e6ea9f7dd1fd89 (patch)
tree3cab4f3f4d6a6c94909ffe09f07706a3701ae1d8 /drivers/pcmcia/pxa2xx_hx4700.c
parent0de91b618281251beb9f73eaa436337779ae25f2 (diff)
downloadlinux-95244306f6fb4f685dd8a672a6e6ea9f7dd1fd89.tar.bz2
pcmcia: add driver for hx4700
This patch adds support for the HP iPAQ hx4700 to the existing pxa2xx-pcmcia driver. Signed-off-by: Paul Parsons <lost.distance@yahoo.com> Cc: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Diffstat (limited to 'drivers/pcmcia/pxa2xx_hx4700.c')
-rw-r--r--drivers/pcmcia/pxa2xx_hx4700.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_hx4700.c b/drivers/pcmcia/pxa2xx_hx4700.c
new file mode 100644
index 000000000000..7dfef3ee5b53
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_hx4700.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.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/err.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+
+#include <asm/mach-types.h>
+#include <mach/hx4700.h>
+
+#include "soc_common.h"
+
+static struct gpio gpios[] = {
+ { GPIO114_HX4700_CF_RESET, GPIOF_OUT_INIT_LOW, "CF reset" },
+ { EGPIO4_CF_3V3_ON, GPIOF_OUT_INIT_LOW, "CF 3.3V enable" },
+};
+
+static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ int ret;
+
+ ret = gpio_request_array(gpios, ARRAY_SIZE(gpios));
+ if (ret)
+ goto out;
+
+ /*
+ * IRQ type must be set before soc_pcmcia_hw_init() calls request_irq().
+ * The asic3 default IRQ type is level trigger low level detect, exactly
+ * the the signal present on GPIOD4_CF_nCD when a CF card is inserted.
+ * If the IRQ type is not changed, the asic3 interrupt handler will loop
+ * repeatedly because it is unable to clear the level trigger interrupt.
+ */
+ irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH);
+
+ skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD;
+ skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
+ skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB;
+ skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
+
+out:
+ return ret;
+}
+
+static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ gpio_free_array(gpios, ARRAY_SIZE(gpios));
+}
+
+static void hx4700_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+ struct pcmcia_state *state)
+{
+ state->vs_3v = 1;
+ state->vs_Xv = 0;
+}
+
+static int hx4700_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ switch (state->Vcc) {
+ case 0:
+ gpio_set_value(EGPIO4_CF_3V3_ON, 0);
+ break;
+ case 33:
+ gpio_set_value(EGPIO4_CF_3V3_ON, 1);
+ break;
+ default:
+ printk(KERN_ERR "pcmcia: Unsupported Vcc: %d\n", state->Vcc);
+ return -EINVAL;
+ }
+
+ gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0);
+
+ return 0;
+}
+
+static struct pcmcia_low_level hx4700_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .nr = 1,
+ .hw_init = hx4700_pcmcia_hw_init,
+ .hw_shutdown = hx4700_pcmcia_hw_shutdown,
+ .socket_state = hx4700_pcmcia_socket_state,
+ .configure_socket = hx4700_pcmcia_configure_socket,
+};
+
+static struct platform_device *hx4700_pcmcia_device;
+
+static int __init hx4700_pcmcia_init(void)
+{
+ struct platform_device *pdev;
+
+ if (!machine_is_h4700())
+ return -ENODEV;
+
+ pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1,
+ &hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops));
+ if (IS_ERR(pdev))
+ return PTR_ERR(pdev);
+
+ hx4700_pcmcia_device = pdev;
+
+ return 0;
+}
+
+static void __exit hx4700_pcmcia_exit(void)
+{
+ platform_device_unregister(hx4700_pcmcia_device);
+}
+
+module_init(hx4700_pcmcia_init);
+module_exit(hx4700_pcmcia_exit);
+
+MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>");
+MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver");
+MODULE_LICENSE("GPL");