[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>

1 files changed, 354 insertions, 0 deletions

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