ARM omap4: panda board support

This patch adds support for the TI omap4 panda board.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 230 insertions, 0 deletions

diff --git a/arch/arm/boards/panda/board.c b/arch/arm/boards/panda/board.c
new file mode 100644
index 0000000000..ff05f9e24b
--- /dev/null
+++ b/arch/arm/boards/panda/board.c
@@ -0,0 +1,230 @@
+#include <common.h>
+#include <console.h>
+#include <init.h>
+#include <fs.h>
+#include <driver.h>
+#include <asm/io.h>
+#include <ns16550.h>
+#include <asm/armlinux.h>
+#include <linux/stat.h>
+#include <generated/mach-types.h>
+#include <mach/silicon.h>
+#include <mach/sdrc.h>
+#include <mach/sys_info.h>
+#include <mach/syslib.h>
+#include <mach/control.h>
+#include <usb/ehci.h>
+#include <linux/err.h>
+#include <sizes.h>
+#include <asm/mmu.h>
+#include <mach/gpio.h>
+#include <environment.h>
+#include <mach/xload.h>
+
+static int board_revision;
+
+#define GPIO_HUB_POWER 1
+#define GPIO_HUB_NRESET_39 39
+#define GPIO_HUB_NRESET_62 62
+#define GPIO_BOARD_ID0 182
+#define GPIO_BOARD_ID1 101
+#define GPIO_BOARD_ID2 171
+
+static struct NS16550_plat serial_plat = {
+	.clock = 48000000,      /* 48MHz (APLL96/2) */
+	.f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR,
+	.reg_read = omap_uart_read,
+	.reg_write = omap_uart_write,
+};
+
+static struct device_d panda_serial_device = {
+	.id = -1,
+	.name = "serial_ns16550",
+	.map_base = OMAP44XX_UART3_BASE,
+	.size = 1024,
+	.platform_data = (void *)&serial_plat,
+};
+
+static int panda_console_init(void)
+{
+	/* Register the serial port */
+	return register_device(&panda_serial_device);
+}
+console_initcall(panda_console_init);
+
+static struct memory_platform_data sram_pdata = {
+	.name = "ram0",
+	.flags = DEVFS_RDWR,
+};
+
+static struct device_d sdram_dev = {
+	.id = -1,
+	.name = "mem",
+	.map_base = 0x80000000,
+	.size = SZ_1G,
+	.platform_data = &sram_pdata,
+};
+
+#ifdef CONFIG_MMU
+static int panda_mmu_init(void)
+{
+	mmu_init();
+
+	arm_create_section(0x80000000, 0x80000000, 256, PMD_SECT_DEF_CACHED);
+	arm_create_section(0x90000000, 0x80000000, 256, PMD_SECT_DEF_UNCACHED);
+
+	mmu_enable();
+
+	return 0;
+}
+device_initcall(panda_mmu_init);
+#endif
+
+static struct ehci_platform_data ehci_pdata = {
+	.flags = 0,
+	.hccr_offset = 0x0,
+	.hcor_offset = 0x10,
+};
+
+static struct device_d usbh_dev = {
+	.id	  = -1,
+	.name     = "ehci",
+	.map_base = 0x4a064c00,
+	.size     = 4 * 1024,
+	.platform_data = &ehci_pdata,
+};
+
+static void panda_ehci_init(void)
+{
+	u32 val;
+	int hub_nreset;
+
+	if (board_revision)
+		hub_nreset = GPIO_HUB_NRESET_62;
+	else
+		hub_nreset = GPIO_HUB_NRESET_39;
+
+	/* disable the power to the usb hub prior to init */
+	gpio_direction_output(GPIO_HUB_POWER, 0);
+	gpio_set_value(GPIO_HUB_POWER, 0);
+
+	/* reset phy+hub */
+	gpio_direction_output(hub_nreset, 0);
+	gpio_set_value(hub_nreset, 0);
+	gpio_set_value(hub_nreset, 1);
+	val = readl(0x4a009358);
+	val |= (1 << 24);
+	writel(val, 0x4a009358);
+	writel(0x7, 0x4a008180);
+	mdelay(10);
+
+	writel(0x00000014, 0x4a064010);
+	writel(0x8000001c, 0x4a064040);
+
+	/* enable power to hub */
+	gpio_set_value(GPIO_HUB_POWER, 1);
+
+	register_device(&usbh_dev);
+}
+
+static void __init panda_boardrev_init(void)
+{
+	board_revision = gpio_get_value(GPIO_BOARD_ID0);
+	board_revision |= (gpio_get_value(GPIO_BOARD_ID1)<<1);
+	board_revision |= (gpio_get_value(GPIO_BOARD_ID2)<<2);
+
+	pr_info("PandaBoard Revision: %03d\n", board_revision);
+}
+
+static struct device_d hsmmc_dev = {
+	.id = -1,
+	.name = "omap-hsmmc",
+	.map_base = 0x4809C100,
+	.size = SZ_4K,
+};
+
+static int panda_devices_init(void)
+{
+	panda_boardrev_init();
+
+	if (gpio_get_value(182)) {
+		/* enable software ioreq */
+		sr32(OMAP44XX_SCRM_AUXCLK3, 8, 1, 0x1);
+		/* set for sys_clk (38.4MHz) */
+		sr32(OMAP44XX_SCRM_AUXCLK3, 1, 2, 0x0);
+		/* set divisor to 2 */
+		sr32(OMAP44XX_SCRM_AUXCLK3, 16, 4, 0x1);
+		/* set the clock source to active */
+		sr32(OMAP44XX_SCRM_ALTCLKSRC, 0, 1, 0x1);
+		/* enable clocks */
+		sr32(OMAP44XX_SCRM_ALTCLKSRC, 2, 2, 0x3);
+	} else {
+		/* enable software ioreq */
+		sr32(OMAP44XX_SCRM_AUXCLK1, 8, 1, 0x1);
+		/* set for PER_DPLL */
+		sr32(OMAP44XX_SCRM_AUXCLK1, 1, 2, 0x2);
+		/* set divisor to 16 */
+		sr32(OMAP44XX_SCRM_AUXCLK1, 16, 4, 0xf);
+		/* set the clock source to active */
+		sr32(OMAP44XX_SCRM_ALTCLKSRC, 0, 1, 0x1);
+		/* enable clocks */
+		sr32(OMAP44XX_SCRM_ALTCLKSRC, 2, 2, 0x3);
+	}
+
+	register_device(&sdram_dev);
+	register_device(&hsmmc_dev);
+	panda_ehci_init();
+
+	armlinux_add_dram(&sdram_dev);
+	armlinux_set_bootparams((void *)0x80000100);
+	armlinux_set_architecture(MACH_TYPE_OMAP4_PANDA);
+
+	return 0;
+}
+device_initcall(panda_devices_init);
+
+#ifdef CONFIG_DEFAULT_ENVIRONMENT
+static int panda_env_init(void)
+{
+	struct stat s;
+	char *diskdev = "/dev/disk0.0";
+	int ret;
+
+	ret = stat(diskdev, &s);
+	if (ret) {
+		printf("no %s. using default env\n", diskdev);
+		return 0;
+	}
+
+	mkdir ("/boot", 0666);
+	ret = mount(diskdev, "fat", "/boot");
+	if (ret) {
+		printf("failed to mount %s\n", diskdev);
+		return 0;
+	}
+
+	default_environment_path = "/boot/bareboxenv";
+
+	return 0;
+}
+late_initcall(panda_env_init);
+#endif
+
+
+#ifdef CONFIG_SHELL_NONE
+int run_shell(void)
+{
+	int (*func)(void);
+
+	func = omap_xload_boot_mmc();
+	if (!func) {
+		printf("booting failed\n");
+		while (1);
+	}
+
+	shutdown_barebox();
+	func();
+
+	while (1);
+}
+#endif