igep00x0: merge igep0020 and igep0030 defconfigs to igep00x0_defconfig

Update igep00x0 code with the following features:
- Add board and revision detection for the boards:
  - IGEP0020-RF
  - IGEP0020-RC
  - IGEP0030-RG
  - IGEP0030-RE
- Merge IGEP0020 and IGEP0030 mux tables
- Add suport to use GPIO_126, GPIO_127 and GPIO_129
- board_name and board_rev environment variables display board and
  revision informations
- Move dtb name selection from code to boot script

Signed-off-by: Pau Pajuelo <ppajuel@gmail.com>
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Tested-by: Pau Pajuelo <ppajuel@gmail.com>

1 files changed, 82 insertions, 8 deletions

diff --git a/board/isee/igep00x0/igep00x0.c b/board/isee/igep00x0/igep00x0.c
index 74f9bab093..5c7f256711 100644
--- a/board/isee/igep00x0/igep00x0.c
+++ b/board/isee/igep00x0/igep00x0.c
@@ -17,7 +17,6 @@
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/mux.h>
 #include <asm/arch/sys_proto.h>
-#include <asm/mach-types.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/onenand.h>
@@ -38,6 +37,43 @@ U_BOOT_DEVICE(igep_uart) = {
 	&igep_serial
 };
 
+/*
+ * Routine: get_board_revision
+ * Description: GPIO_28 and GPIO_129 are used to read board and revision from
+ * IGEP00x0 boards. First of all, it is necessary to reset USB transceiver from
+ * IGEP0030 in order to read GPIO_IGEP00X0_BOARD_DETECTION correctly, because
+ * this functionality is shared by USB HOST.
+ * Once USB reset is applied, U-boot configures these pins as input pullup to
+ * detect board and revision:
+ * IGEP0020-RF = 0b00
+ * IGEP0020-RC = 0b01
+ * IGEP0030-RG = 0b10
+ * IGEP0030-RE = 0b11
+ */
+static int get_board_revision(void)
+{
+	int revision;
+
+	gpio_request(IGEP0030_USB_TRANSCEIVER_RESET,
+				"igep0030_usb_transceiver_reset");
+	gpio_direction_output(IGEP0030_USB_TRANSCEIVER_RESET, 0);
+
+	gpio_request(GPIO_IGEP00X0_BOARD_DETECTION, "igep00x0_board_detection");
+	gpio_direction_input(GPIO_IGEP00X0_BOARD_DETECTION);
+	revision = 2 * gpio_get_value(GPIO_IGEP00X0_BOARD_DETECTION);
+	gpio_free(GPIO_IGEP00X0_BOARD_DETECTION);
+
+	gpio_request(GPIO_IGEP00X0_REVISION_DETECTION,
+				"igep00x0_revision_detection");
+	gpio_direction_input(GPIO_IGEP00X0_REVISION_DETECTION);
+	revision = revision + gpio_get_value(GPIO_IGEP00X0_REVISION_DETECTION);
+	gpio_free(GPIO_IGEP00X0_REVISION_DETECTION);
+
+	gpio_free(IGEP0030_USB_TRANSCEIVER_RESET);
+
+	return revision;
+}
+
 int onenand_board_init(struct mtd_info *mtd)
 {
 	if (gpmc_cs0_flash == MTD_DEV_TYPE_ONENAND) {
@@ -138,31 +174,69 @@ int ft_board_setup(void *blob, bd_t *bd)
 }
 #endif
 
-void set_fdt(void)
+void set_led(void)
 {
-	switch (gd->bd->bi_arch_number) {
-	case MACH_TYPE_IGEP0020:
-		env_set("fdtfile", "omap3-igep0020.dtb");
+	switch (get_board_revision()) {
+	case 0:
+	case 1:
+		gpio_request(IGEP0020_GPIO_LED, "igep0020_gpio_led");
+		gpio_direction_output(IGEP0020_GPIO_LED, 1);
 		break;
-	case MACH_TYPE_IGEP0030:
-		env_set("fdtfile", "omap3-igep0030.dtb");
+	case 2:
+	case 3:
+		gpio_request(IGEP0030_GPIO_LED, "igep0030_gpio_led");
+		gpio_direction_output(IGEP0030_GPIO_LED, 0);
+		break;
+	default:
+		/* Should not happen... */
 		break;
 	}
 }
 
+void set_boardname(void)
+{
+	char rev[5] = { 'F','C','G','E', };
+	int i = get_board_revision();
+
+	rev[i+1] = 0;
+	env_set("board_rev", rev + i);
+	env_set("board_name", i < 2 ? "igep0020" : "igep0030");
+}
+
 /*
  * Routine: misc_init_r
  * Description: Configure board specific parts
  */
 int misc_init_r(void)
 {
+	t2_t *t2_base = (t2_t *)T2_BASE;
+	u32 pbias_lite;
+
 	twl4030_power_init();
 
+	/* set VSIM to 1.8V */
+	twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VSIM_DEDICATED,
+				TWL4030_PM_RECEIVER_VSIM_VSEL_18,
+				TWL4030_PM_RECEIVER_VSIM_DEV_GRP,
+				TWL4030_PM_RECEIVER_DEV_GRP_P1);
+
+	/* set up dual-voltage GPIOs to 1.8V */
+	pbias_lite = readl(&t2_base->pbias_lite);
+	pbias_lite &= ~PBIASLITEVMODE1;
+	pbias_lite |= PBIASLITEPWRDNZ1;
+	writel(pbias_lite, &t2_base->pbias_lite);
+	if (get_cpu_family() == CPU_OMAP36XX)
+		writel(readl(OMAP34XX_CTRL_WKUP_CTRL) |
+					 OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ,
+					 OMAP34XX_CTRL_WKUP_CTRL);
+
 	setup_net_chip();
 
 	omap_die_id_display();
 
-	set_fdt();
+	set_led();
+
+	set_boardname();
 
 	return 0;
 }