[ARM] 4475/2: EM-x270 board support

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 359 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 5c0a10041cd1..5ebec6d88b51 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -37,6 +37,10 @@ config MACH_TRIZEPS4
 	bool "Keith und Koep Trizeps4 DIMM-Module"
 	select PXA27x
 
+config MACH_EM_X270
+	bool "CompuLab EM-x270 platform"
+	select PXA27x
+
 endchoice
 
 if PXA_SHARPSL
diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 9093eb1c94eb..7d6ab5c59ab9 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_PXA_SHARP_Cxx00)	+= spitz.o corgi_ssp.o corgi_lcd.o sharpsl_pm.o sp
 obj-$(CONFIG_MACH_AKITA)	+= akita-ioexp.o
 obj-$(CONFIG_MACH_POODLE)	+= poodle.o corgi_ssp.o
 obj-$(CONFIG_MACH_TOSA)         += tosa.o
+obj-$(CONFIG_MACH_EM_X270) += em-x270.o
 
 # Support for blinky lights
 led-y := leds.o
diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
new file mode 100644
index 000000000000..3d0ad5065ee5
--- /dev/null
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -0,0 +1,354 @@
+/*
+ * Support for CompuLab EM-x270 platform
+ *
+ * Copyright (C) 2007 CompuLab, Ltd.
+ * Author: Mike Rapoport <mike@compulab.co.il>
+ *
+ * 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/irq.h>
+#include <linux/platform_device.h>
+
+#include <linux/dm9000.h>
+#include <linux/rtc-v3020.h>
+
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/mach-types.h>
+
+#include <asm/mach/arch.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxafb.h>
+#include <asm/arch/ohci.h>
+#include <asm/arch/mmc.h>
+#include <asm/arch/bitfield.h>
+
+#include "generic.h"
+
+/* GPIO IRQ usage */
+#define EM_X270_MMC_PD		(105)
+#define EM_X270_ETHIRQ		IRQ_GPIO(41)
+#define EM_X270_MMC_IRQ		IRQ_GPIO(13)
+
+static struct resource em_x270_dm9k_resource[] = {
+	[0] = {
+		.start = PXA_CS2_PHYS,
+		.end   = PXA_CS2_PHYS + 3,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = PXA_CS2_PHYS + 8,
+		.end   = PXA_CS2_PHYS + 8 + 0x3f,
+		.flags = IORESOURCE_MEM,
+	},
+	[2] = {
+		.start = EM_X270_ETHIRQ,
+		.end   = EM_X270_ETHIRQ,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+/* for the moment we limit ourselves to 32bit IO until some
+ * better IO routines can be written and tested
+ */
+static struct dm9000_plat_data em_x270_dm9k_platdata = {
+	.flags		= DM9000_PLATF_32BITONLY,
+};
+
+/* Ethernet device */
+static struct platform_device em_x270_dm9k = {
+	.name		= "dm9000",
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(em_x270_dm9k_resource),
+	.resource	= em_x270_dm9k_resource,
+	.dev		= {
+		.platform_data = &em_x270_dm9k_platdata,
+	}
+};
+
+/* audio device */
+static struct platform_device em_x270_audio = {
+	.name		= "pxa2xx-ac97",
+	.id		= -1,
+};
+
+/* WM9712 touchscreen controller. Hopefully the driver will make it to
+ * the mainstream sometime */
+static struct platform_device em_x270_ts = {
+	.name		= "wm97xx-ts",
+	.id		= -1,
+};
+
+/* RTC */
+static struct resource em_x270_v3020_resource[] = {
+	[0] = {
+		.start = PXA_CS4_PHYS,
+		.end   = PXA_CS4_PHYS + 3,
+		.flags = IORESOURCE_MEM,
+	},
+};
+
+static struct v3020_platform_data em_x270_v3020_platdata = {
+	.leftshift = 0,
+};
+
+static struct platform_device em_x270_rtc = {
+	.name		= "v3020",
+	.num_resources	= ARRAY_SIZE(em_x270_v3020_resource),
+	.resource	= em_x270_v3020_resource,
+	.id		= -1,
+	.dev		= {
+		.platform_data = &em_x270_v3020_platdata,
+	}
+};
+
+/* NAND flash */
+#define GPIO_NAND_CS	(11)
+#define GPIO_NAND_RB	(56)
+
+static inline void nand_cs_on(void)
+{
+	GPCR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
+}
+
+static void nand_cs_off(void)
+{
+	dsb();
+
+	GPSR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
+}
+
+/* hardware specific access to control-lines */
+static void em_x270_nand_cmd_ctl(struct mtd_info *mtd, int dat,
+				 unsigned int ctrl)
+{
+	struct nand_chip *this = mtd->priv;
+	unsigned long nandaddr = (unsigned long)this->IO_ADDR_W;
+
+	dsb();
+
+	if (ctrl & NAND_CTRL_CHANGE) {
+		if (ctrl & NAND_ALE)
+			nandaddr |=  (1 << 3);
+		else
+			nandaddr &= ~(1 << 3);
+		if (ctrl & NAND_CLE)
+			nandaddr |=  (1 << 2);
+		else
+			nandaddr &= ~(1 << 2);
+		if (ctrl & NAND_NCE)
+			nand_cs_on();
+		else
+			nand_cs_off();
+	}
+
+	dsb();
+	this->IO_ADDR_W = (void __iomem *)nandaddr;
+	if (dat != NAND_CMD_NONE)
+		writel(dat, this->IO_ADDR_W);
+
+	dsb();
+}
+
+/* read device ready pin */
+static int em_x270_nand_device_ready(struct mtd_info *mtd)
+{
+	dsb();
+
+	return GPLR(GPIO_NAND_RB) & GPIO_bit(GPIO_NAND_RB);
+}
+
+static struct mtd_partition em_x270_partition_info[] = {
+	[0] = {
+		.name	= "em_x270-0",
+		.offset	= 0,
+		.size	= SZ_4M,
+	},
+	[1] = {
+		.name	= "em_x270-1",
+		.offset	= MTDPART_OFS_APPEND,
+		.size	= MTDPART_SIZ_FULL
+	},
+};
+
+static const char *em_x270_part_probes[] = { "cmdlinepart", NULL };
+
+struct platform_nand_data em_x270_nand_platdata = {
+	.chip = {
+		.nr_chips = 1,
+		.chip_offset = 0,
+		.nr_partitions = ARRAY_SIZE(em_x270_partition_info),
+		.partitions = em_x270_partition_info,
+		.chip_delay = 20,
+		.part_probe_types = em_x270_part_probes,
+	},
+	.ctrl = {
+		.hwcontrol = 0,
+		.dev_ready = em_x270_nand_device_ready,
+		.select_chip = 0,
+		.cmd_ctrl = em_x270_nand_cmd_ctl,
+	},
+};
+
+static struct resource em_x270_nand_resource[] = {
+	[0] = {
+		.start = PXA_CS1_PHYS,
+		.end   = PXA_CS1_PHYS + 12,
+		.flags = IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device em_x270_nand = {
+	.name		= "gen_nand",
+	.num_resources	= ARRAY_SIZE(em_x270_nand_resource),
+	.resource	= em_x270_nand_resource,
+	.id		= -1,
+	.dev		= {
+		.platform_data = &em_x270_nand_platdata,
+	}
+};
+
+/* platform devices */
+static struct platform_device *platform_devices[] __initdata = {
+	&em_x270_dm9k,
+	&em_x270_audio,
+	&em_x270_ts,
+	&em_x270_rtc,
+	&em_x270_nand,
+};
+
+
+/* PXA27x OHCI controller setup */
+static int em_x270_ohci_init(struct device *dev)
+{
+	/* Set the Power Control Polarity Low */
+	UHCHR = (UHCHR | UHCHR_PCPL) &
+		~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSE);
+
+	/* enable port 2 transiever */
+	UP2OCR = UP2OCR_HXS | UP2OCR_HXOE;
+
+	return 0;
+}
+
+static struct pxaohci_platform_data em_x270_ohci_platform_data = {
+	.port_mode	= PMM_PERPORT_MODE,
+	.init		= em_x270_ohci_init,
+};
+
+
+static int em_x270_mci_init(struct device *dev,
+			    irq_handler_t em_x270_detect_int,
+			    void *data)
+{
+	int err;
+
+	/* setup GPIO for PXA27x MMC controller */
+	pxa_gpio_mode(GPIO32_MMCCLK_MD);
+	pxa_gpio_mode(GPIO112_MMCCMD_MD);
+	pxa_gpio_mode(GPIO92_MMCDAT0_MD);
+	pxa_gpio_mode(GPIO109_MMCDAT1_MD);
+	pxa_gpio_mode(GPIO110_MMCDAT2_MD);
+	pxa_gpio_mode(GPIO111_MMCDAT3_MD);
+
+	/* EM-X270 uses GPIO13 as SD power enable */
+	pxa_gpio_mode(EM_X270_MMC_PD | GPIO_OUT);
+
+	err = request_irq(EM_X270_MMC_IRQ, em_x270_detect_int,
+			  IRQF_DISABLED | IRQF_TRIGGER_FALLING,
+			  "MMC card detect", data);
+	if (err) {
+		printk(KERN_ERR "%s: can't request MMC card detect IRQ: %d\n",
+		       __FUNCTION__, err);
+		return err;
+	}
+
+	return 0;
+}
+
+static void em_x270_mci_setpower(struct device *dev, unsigned int vdd)
+{
+	/*
+	   FIXME: current hardware implementation does not allow to
+	   enable/disable MMC power. This will be fixed in next HW releases,
+	   and we'll need to add implmentation here.
+	*/
+	return;
+}
+
+static void em_x270_mci_exit(struct device *dev, void *data)
+{
+	free_irq(EM_X270_MMC_IRQ, data);
+}
+
+static struct pxamci_platform_data em_x270_mci_platform_data = {
+	.ocr_mask	= MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31,
+	.init 		= em_x270_mci_init,
+	.setpower 	= em_x270_mci_setpower,
+	.exit		= em_x270_mci_exit,
+};
+
+/* LCD 480x640 */
+static struct pxafb_mode_info em_x270_lcd_mode = {
+	.pixclock	= 50000,
+	.bpp		= 16,
+	.xres		= 480,
+	.yres		= 640,
+	.hsync_len	= 8,
+	.vsync_len	= 2,
+	.left_margin	= 8,
+	.upper_margin	= 0,
+	.right_margin	= 24,
+	.lower_margin	= 4,
+	.cmap_greyscale	= 0,
+};
+
+static struct pxafb_mach_info em_x270_lcd = {
+	.modes		= &em_x270_lcd_mode,
+	.num_modes	= 1,
+	.cmap_inverse	= 0,
+	.cmap_static	= 0,
+	.lccr0		= LCCR0_PAS,
+	.lccr3		= LCCR3_PixClkDiv(0x01) | LCCR3_Acb(0xff),
+};
+
+static void __init em_x270_init(void)
+{
+	/* setup LCD */
+	set_pxa_fb_info(&em_x270_lcd);
+
+	/* register EM-X270 platform devices */
+	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
+
+	/* set MCI and OHCI platform parameters */
+	pxa_set_mci_info(&em_x270_mci_platform_data);
+	pxa_set_ohci_info(&em_x270_ohci_platform_data);
+
+	/* setup STUART GPIOs */
+	pxa_gpio_mode(GPIO46_STRXD_MD);
+	pxa_gpio_mode(GPIO47_STTXD_MD);
+
+	/* setup BTUART GPIOs */
+	pxa_gpio_mode(GPIO42_BTRXD_MD);
+	pxa_gpio_mode(GPIO43_BTTXD_MD);
+	pxa_gpio_mode(GPIO44_BTCTS_MD);
+	pxa_gpio_mode(GPIO45_BTRTS_MD);
+
+	/* Setup interrupt for dm9000 */
+	set_irq_type(EM_X270_ETHIRQ, IRQT_RISING);
+}
+
+MACHINE_START(EM_X270, "Compulab EM-x270")
+	.boot_params	= 0xa0000100,
+	.phys_io	= 0x40000000,
+	.io_pg_offst	= (io_p2v(0x40000000) >> 18) & 0xfffc,
+	.map_io		= pxa_map_io,
+	.init_irq	= pxa27x_init_irq,
+	.timer		= &pxa_timer,
+	.init_machine	= em_x270_init,
+MACHINE_END