ARM: OMAP3: Add support for the Gumstix Overo board (rev 3)

This patch adds minimal overo support.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

3 files changed, 246 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 23fd1cc034a0..aef043b87b44 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -48,3 +48,6 @@ config MACH_OMAP3_BEAGLE
         bool "OMAP3 BEAGLE board"
         depends on ARCH_OMAP3 && ARCH_OMAP34XX
 
+config MACH_OVERO
+        bool "Gumstix Overo board"
+        depends on ARCH_OMAP3 && ARCH_OMAP34XX
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 420ad9accebf..feb9caf771d5 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -30,4 +30,5 @@ obj-$(CONFIG_MACH_OMAP_H4)		+= board-h4.o
 obj-$(CONFIG_MACH_OMAP_2430SDP)         += board-2430sdp.o
 obj-$(CONFIG_MACH_OMAP_APOLLON)         += board-apollon.o
 obj-$(CONFIG_MACH_OMAP3_BEAGLE)         += board-omap3beagle.o
+obj-$(CONFIG_MACH_OVERO)                += board-overo.o
 
diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
new file mode 100644
index 000000000000..e09aa59a399c
--- /dev/null
+++ b/arch/arm/mach-omap2/board-overo.c
@@ -0,0 +1,242 @@
+/*
+ * board-overo.c (Gumstix Overo)
+ *
+ * Initial code: Steve Sakoman <steve@sakoman.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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+#include <asm/mach/map.h>
+
+#include <mach/board-overo.h>
+#include <mach/board.h>
+#include <mach/common.h>
+#include <mach/gpio.h>
+#include <mach/gpmc.h>
+#include <mach/hardware.h>
+#include <mach/nand.h>
+
+#define NAND_BLOCK_SIZE SZ_128K
+#define GPMC_CS0_BASE  0x60
+#define GPMC_CS_SIZE   0x30
+
+static struct mtd_partition overo_nand_partitions[] = {
+        {
+                .name           = "xloader",
+                .offset         = 0,                    /* Offset = 0x00000 */
+                .size           = 4 * NAND_BLOCK_SIZE,
+                .mask_flags     = MTD_WRITEABLE
+        },
+        {
+                .name           = "uboot",
+                .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x80000 */
+                .size           = 14 * NAND_BLOCK_SIZE,
+        },
+        {
+                .name           = "uboot environment",
+                .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x240000 */
+                .size           = 2 * NAND_BLOCK_SIZE,
+        },
+        {
+                .name           = "linux",
+                .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x280000 */
+                .size           = 32 * NAND_BLOCK_SIZE,
+        },
+        {
+                .name           = "rootfs",
+                .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x680000 */
+                .size           = MTDPART_SIZ_FULL,
+        },
+};
+
+static struct omap_nand_platform_data overo_nand_data = {
+        .parts = overo_nand_partitions,
+        .nr_parts = ARRAY_SIZE(overo_nand_partitions),
+        .dma_channel = -1,      /* disable DMA in OMAP NAND driver */
+};
+
+static struct resource overo_nand_resource = {
+        .flags          = IORESOURCE_MEM,
+};
+
+static struct platform_device overo_nand_device = {
+        .name           = "omap2-nand",
+        .id             = -1,
+        .dev            = {
+                .platform_data  = &overo_nand_data,
+        },
+        .num_resources  = 1,
+        .resource       = &overo_nand_resource,
+};
+
+
+static void __init overo_flash_init(void)
+{
+        u8 cs = 0;
+        u8 nandcs = GPMC_CS_NUM + 1;
+
+        u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;
+
+        /* find out the chip-select on which NAND exists */
+        while (cs < GPMC_CS_NUM) {
+                u32 ret = 0;
+                ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
+
+                if ((ret & 0xC00) == 0x800) {
+                        printk(KERN_INFO "Found NAND on CS%d\n", cs);
+                        if (nandcs > GPMC_CS_NUM)
+                                nandcs = cs;
+                }
+                cs++;
+        }
+
+        if (nandcs > GPMC_CS_NUM) {
+                printk(KERN_INFO "NAND: Unable to find configuration "
+                                 "in GPMC\n ");
+                return;
+        }
+
+        if (nandcs < GPMC_CS_NUM) {
+                overo_nand_data.cs = nandcs;
+                overo_nand_data.gpmc_cs_baseaddr = (void *)
+                        (gpmc_base_add + GPMC_CS0_BASE + nandcs * GPMC_CS_SIZE);
+                overo_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);
+
+                printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
+                if (platform_device_register(&overo_nand_device) < 0)
+                        printk(KERN_ERR "Unable to register NAND device\n");
+        }
+}
+static struct omap_uart_config overo_uart_config __initdata = {
+        .enabled_uarts  = ((1 << 0) | (1 << 1) | (1 << 2)),
+};
+
+static int __init overo_i2c_init(void)
+{
+        /* i2c2 pins are used for gpio */
+        omap_register_i2c_bus(3, 400, NULL, 0);
+        return 0;
+}
+
+static void __init overo_init_irq(void)
+{
+        omap2_init_common_hw();
+        omap_init_irq();
+        omap_gpio_init();
+}
+
+static struct platform_device overo_lcd_device = {
+        .name           = "overo_lcd",
+        .id             = -1,
+};
+
+static struct omap_lcd_config overo_lcd_config __initdata = {
+        .ctrl_name      = "internal",
+};
+
+static struct omap_board_config_kernel overo_config[] __initdata = {
+        { OMAP_TAG_UART,        &overo_uart_config },
+        { OMAP_TAG_LCD,         &overo_lcd_config },
+};
+
+static struct platform_device *overo_devices[] __initdata = {
+        &overo_lcd_device,
+};
+
+static void __init overo_init(void)
+{
+        overo_i2c_init();
+        platform_add_devices(overo_devices, ARRAY_SIZE(overo_devices));
+        omap_board_config = overo_config;
+        omap_board_config_size = ARRAY_SIZE(overo_config);
+        omap_serial_init();
+        overo_flash_init();
+
+        if ((gpio_request(OVERO_GPIO_W2W_NRESET,
+                          "OVERO_GPIO_W2W_NRESET") == 0) &&
+            (gpio_direction_output(OVERO_GPIO_W2W_NRESET, 1) == 0)) {
+                gpio_export(OVERO_GPIO_W2W_NRESET, 0);
+                gpio_set_value(OVERO_GPIO_W2W_NRESET, 0);
+                udelay(10);
+                gpio_set_value(OVERO_GPIO_W2W_NRESET, 1);
+        } else {
+                printk(KERN_ERR "could not obtain gpio for "
+                                        "OVERO_GPIO_W2W_NRESET\n");
+        }
+
+        if ((gpio_request(OVERO_GPIO_BT_XGATE, "OVERO_GPIO_BT_XGATE") == 0) &&
+            (gpio_direction_output(OVERO_GPIO_BT_XGATE, 0) == 0))
+                gpio_export(OVERO_GPIO_BT_XGATE, 0);
+        else
+                printk(KERN_ERR "could not obtain gpio for OVERO_GPIO_BT_XGATE\n");
+
+        if ((gpio_request(OVERO_GPIO_BT_NRESET, "OVERO_GPIO_BT_NRESET") == 0) &&
+            (gpio_direction_output(OVERO_GPIO_BT_NRESET, 1) == 0)) {
+                gpio_export(OVERO_GPIO_BT_NRESET, 0);
+                gpio_set_value(OVERO_GPIO_BT_NRESET, 0);
+                mdelay(6);
+                gpio_set_value(OVERO_GPIO_BT_NRESET, 1);
+        } else {
+                printk(KERN_ERR "could not obtain gpio for "
+                                        "OVERO_GPIO_BT_NRESET\n");
+        }
+
+        if ((gpio_request(OVERO_GPIO_USBH_CPEN, "OVERO_GPIO_USBH_CPEN") == 0) &&
+            (gpio_direction_output(OVERO_GPIO_USBH_CPEN, 1) == 0))
+                gpio_export(OVERO_GPIO_USBH_CPEN, 0);
+        else
+                printk(KERN_ERR "could not obtain gpio for "
+                                        "OVERO_GPIO_USBH_CPEN\n");
+
+        if ((gpio_request(OVERO_GPIO_USBH_NRESET,
+                          "OVERO_GPIO_USBH_NRESET") == 0) &&
+            (gpio_direction_output(OVERO_GPIO_USBH_NRESET, 1) == 0))
+                gpio_export(OVERO_GPIO_USBH_NRESET, 0);
+        else
+                printk(KERN_ERR "could not obtain gpio for "
+                                        "OVERO_GPIO_USBH_NRESET\n");
+}
+
+static void __init overo_map_io(void)
+{
+        omap2_set_globals_343x();
+        omap2_map_common_io();
+}
+
+MACHINE_START(OVERO, "Gumstix Overo")
+        .phys_io        = 0x48000000,
+        .io_pg_offst    = ((0xd8000000) >> 18) & 0xfffc,
+        .boot_params    = 0x80000100,
+        .map_io         = overo_map_io,
+        .init_irq       = overo_init_irq,
+        .init_machine   = overo_init,
+        .timer          = &omap_timer,
+MACHINE_END