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Date: Wed, 6 Aug 2008 15:19:53 +0200
From: Marc Zyngier <maz@...terjones.org>
To: linux-kernel@...r.kernel.org
Cc: Amit Walambe <amit.walambe@...otech-ltd.co.uk>,
Dominik Brodowski <linux@...inikbrodowski.net>,
Marc Zyngier <maz@...terjones.org>,
Marc Zyngier <marc.zyngier@...ran.com>
Subject: [PATCH 4/5] Add support for the Arcom/Eurotech Viper SBC CompactFlash card slot.
Signed-off-by: Marc Zyngier <marc.zyngier@...ran.com>
---
drivers/pcmcia/Kconfig | 2 +-
drivers/pcmcia/Makefile | 1 +
drivers/pcmcia/pxa2xx_viper.c | 183 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 185 insertions(+), 1 deletions(-)
create mode 100644 drivers/pcmcia/pxa2xx_viper.c
diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index e0f8840..de57e7e 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -220,7 +220,7 @@ config PCMCIA_PXA2XX
tristate "PXA2xx support"
depends on ARM && ARCH_PXA && PCMCIA
depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \
- || MACH_ARMCORE || ARCH_PXA_PALM)
+ || MACH_ARMCORE || ARCH_PXA_PALM || ARCH_VIPER)
help
Say Y here to include support for the PXA2xx PCMCIA controller
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index 269a9e9..76e8590 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -72,5 +72,6 @@ pxa2xx_cs-$(CONFIG_ARCH_LUBBOCK) += pxa2xx_lubbock.o sa1111_generic.o
pxa2xx_cs-$(CONFIG_MACH_MAINSTONE) += pxa2xx_mainstone.o
pxa2xx_cs-$(CONFIG_PXA_SHARPSL) += pxa2xx_sharpsl.o
pxa2xx_cs-$(CONFIG_MACH_ARMCORE) += pxa2xx_cm_x270.o
+pxa2xx_cs-$(CONFIG_ARCH_VIPER) += pxa2xx_viper.o
pxa2xx_cs-$(CONFIG_MACH_PALMTX) += pxa2xx_palmtx.o
diff --git a/drivers/pcmcia/pxa2xx_viper.c b/drivers/pcmcia/pxa2xx_viper.c
new file mode 100644
index 0000000..9ac96c3
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_viper.c
@@ -0,0 +1,183 @@
+/*
+ * VIPER PCMCIA support
+ * Copyright 2004 Arcom Control Systems
+ *
+ * Maintained by Marc Zyngier <maz@...terjones.org>
+ * <marc.zyngier@...ran.com>
+ *
+ * Based on:
+ * iPAQ h2200 PCMCIA support
+ * Copyright 2004 Koen Kooi <koen@...tingbar.nl>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <pcmcia/ss.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/viper.h>
+
+#include "soc_common.h"
+#include "pxa2xx_base.h"
+
+static void viper_cf_rst(int state)
+{
+ if (state)
+ viper_icr_set_bit(VIPER_ICR_CF_RST);
+ else
+ viper_icr_clear_bit(VIPER_ICR_CF_RST);
+
+}
+
+static struct pcmcia_irqs irqs[] = {
+ { 0, VIPER_CF_CD_IRQ, "PCMCIA_CD" }
+};
+
+static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ unsigned long flags;
+
+ skt->irq = VIPER_CF_RDY_IRQ;
+
+ if (gpio_request(VIPER_CF_CD_GPIO, "CF detect"))
+ goto err_request_cd;
+
+ if (gpio_request(VIPER_CF_RDY_GPIO, "CF ready"))
+ goto err_request_rdy;
+
+ if (gpio_request(VIPER_CF_POWER_GPIO, "CF power"))
+ goto err_request_pwr;
+
+ local_irq_save(flags);
+
+ /* GPIO 82 is the CF power enable line. initially off */
+ if (gpio_direction_output(VIPER_CF_POWER_GPIO, 0) ||
+ gpio_direction_input(VIPER_CF_CD_GPIO) ||
+ gpio_direction_input(VIPER_CF_RDY_GPIO)) {
+ local_irq_restore(flags);
+ goto err_dir;
+ }
+
+ local_irq_restore(flags);
+
+ return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+
+err_dir:
+ gpio_free(VIPER_CF_POWER_GPIO);
+err_request_pwr:
+ gpio_free(VIPER_CF_RDY_GPIO);
+err_request_rdy:
+ gpio_free(VIPER_CF_CD_GPIO);
+err_request_cd:
+ printk(KERN_ERR "viper: Failed to setup PCMCIA GPIOs\n");
+ return -1;
+}
+
+/*
+ * Release all resources.
+ */
+static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+ gpio_free(VIPER_CF_POWER_GPIO);
+ gpio_free(VIPER_CF_RDY_GPIO);
+ gpio_free(VIPER_CF_CD_GPIO);
+}
+
+static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+ struct pcmcia_state *state)
+{
+ state->detect = gpio_get_value(VIPER_CF_CD_GPIO) ? 0 : 1;
+ state->ready = gpio_get_value(VIPER_CF_RDY_GPIO) ? 1 : 0;
+ state->bvd1 = 1;
+ state->bvd2 = 1;
+ state->wrprot = 0;
+ state->vs_3v = 1; /* Can only apply 3.3V */
+ state->vs_Xv = 0;
+}
+
+static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ /* Silently ignore Vpp, output enable, speaker enable. */
+ viper_cf_rst(state->flags & SS_RESET);
+
+ /* Apply socket voltage */
+ switch (state->Vcc) {
+ case 0:
+ gpio_set_value(VIPER_CF_POWER_GPIO, 0);
+ break;
+ case 33:
+ gpio_set_value(VIPER_CF_POWER_GPIO, 1);
+ break;
+ default:
+ printk(KERN_ERR "%s: Unsupported Vcc:%d\n",
+ __func__, state->Vcc);
+ return -1;
+ }
+
+ return 0;
+}
+
+static void viper_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+}
+
+static void viper_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+}
+
+static struct pcmcia_low_level viper_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .hw_init = viper_pcmcia_hw_init,
+ .hw_shutdown = viper_pcmcia_hw_shutdown,
+ .socket_state = viper_pcmcia_socket_state,
+ .configure_socket = viper_pcmcia_configure_socket,
+ .socket_init = viper_pcmcia_socket_init,
+ .socket_suspend = viper_pcmcia_socket_suspend,
+ .nr = 1,
+ .quirks = PXA2XX_QUIRK_NEEDS_MECR_NOS,
+};
+
+static struct platform_device *viper_pcmcia_device;
+
+static int __init viper_pcmcia_init(void)
+{
+ int ret;
+
+ viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+ if (!viper_pcmcia_device)
+ return -ENOMEM;
+
+ viper_pcmcia_device->dev.platform_data = &viper_pcmcia_ops;
+
+ ret = platform_device_add(viper_pcmcia_device);
+
+ if (ret)
+ platform_device_put(viper_pcmcia_device);
+
+ return ret;
+}
+
+static void __exit viper_pcmcia_exit(void)
+{
+ platform_device_unregister(viper_pcmcia_device);
+}
+
+module_init(viper_pcmcia_init);
+module_exit(viper_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
--
1.5.4.3
--
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