am33xx: Rework pinmux functions

- Move definition of the EEPROM contents to <asm/arch/sys_proto.h>
  - Make some defines a little less generic now.
- Pinmux must be done by done by SPL now.
- Create 3 pinmux functions, uart0, i2c0 and board.
- Add pinmux specific to Starter Kit EVM for MMC now.

Signed-off-by: Tom Rini <trini@ti.com>

arch/arm/cpu/armv7/am33xx/board.c

@@ -25,7 +25,7 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/mmc_host_def.h>
-#include <asm/arch/common_def.h>
+#include <asm/arch/sys_proto.h>
 #include <asm/io.h>
 #include <asm/omap_common.h>
 #include <asm/emif.h>
@@ -58,29 +58,16 @@ const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
 
 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
 
-#define NO_OF_MAC_ADDR          3
-#define ETH_ALEN		6
-#define NAME_LEN		8
-
-struct am335x_baseboard_id {
-	unsigned int  magic;
-	char name[NAME_LEN];
-	char version[4];
-	char serial[12];
-	char config[32];
-	char mac_addr[NO_OF_MAC_ADDR][ETH_ALEN];
-};
-
 static struct am335x_baseboard_id __attribute__((section (".data"))) header;
 
 static inline int board_is_bone(void)
 {
-	return !strncmp(header.name, "A335BONE", NAME_LEN);
+	return !strncmp(header.name, "A335BONE", HDR_NAME_LEN);
 }
 
 static inline int board_is_evm_sk(void)
 {
-	return !strncmp("A335X_SK", header.name, NAME_LEN);
+	return !strncmp("A335X_SK", header.name, HDR_NAME_LEN);
 }
 
 /*
@@ -207,21 +194,18 @@ void s_init(void)
 	if (read_eeprom() < 0)
 		puts("Could not get board ID.\n");
 
+	enable_board_pin_mux(&header);
 	if (board_is_evm_sk()) {
 		/*
 		 * EVM SK 1.2A and later use gpio0_7 to enable DDR3.
 		 * This is safe enough to do on older revs.
 		 */
-		enable_gpio0_7_pin_mux();
 		gpio_request(GPIO_DDR_VTT_EN, "ddr_vtt_en");
 		gpio_direction_output(GPIO_DDR_VTT_EN, 1);
 	}
 
 	config_ddr(board_memory_type());
 #endif
-
-	/* Enable MMC0 */
-	enable_mmc0_pin_mux();
 }
 
 #if defined(CONFIG_OMAP_HSMMC) && !defined(CONFIG_SPL_BUILD)
@@ -238,14 +222,10 @@ void setup_clocks_for_console(void)
 }
 
 /*
- * Basic board specific setup
+ * Basic board specific setup.  Pinmux has been handled already.
  */
 int board_init(void)
 {
-	enable_uart0_pin_mux();
-
-	enable_i2c0_pin_mux();
-	enable_i2c1_pin_mux();
 	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 	if (read_eeprom() < 0)
 		puts("Could not get board ID.\n");
@@ -318,12 +298,10 @@ int board_eth_init(bd_t *bis)
 	}
 
 	if (board_is_bone()) {
-		enable_mii1_pin_mux();
 		writel(MII_MODE_ENABLE, &cdev->miisel);
 		cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if =
 				PHY_INTERFACE_MODE_MII;
 	} else {
-		enable_rgmii1_pin_mux();
 		writel(RGMII_MODE_ENABLE, &cdev->miisel);
 		cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if =
 				PHY_INTERFACE_MODE_RGMII;

arch/arm/include/asm/arch-am33xx/common_def.h

@@ -1,26 +0,0 @@
-/*
- * common_def.h
- *
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#ifndef __COMMON_DEF_H__
-#define __COMMON_DEF_H__
-
-extern void enable_uart0_pin_mux(void);
-extern void enable_mmc0_pin_mux(void);
-extern void enable_gpio0_7_pin_mux(void);
-extern void enable_i2c0_pin_mux(void);
-extern void enable_mii1_pin_mux(void);
-extern void enable_rgmii1_pin_mux(void);
-
-#endif/*__COMMON_DEF_H__ */

arch/arm/include/asm/arch-am33xx/sys_proto.h

@@ -19,6 +19,24 @@
 #ifndef _SYS_PROTO_H_
 #define _SYS_PROTO_H_
 
+/*
+ * AM335x parts define a system EEPROM that defines certain sub-fields.
+ * We use these fields to in turn see what board we are on, and what
+ * that might require us to set or not set.
+ */
+#define HDR_NO_OF_MAC_ADDR	3
+#define HDR_ETH_ALEN		6
+#define HDR_NAME_LEN		8
+
+struct am335x_baseboard_id {
+	unsigned int  magic;
+	char name[HDR_NAME_LEN];
+	char version[4];
+	char serial[12];
+	char config[32];
+	char mac_addr[HDR_NO_OF_MAC_ADDR][HDR_ETH_ALEN];
+};
+
 #define BOARD_REV_ID	0x0
 
 u32 get_cpu_rev(void);
@@ -31,4 +49,14 @@ int print_cpuinfo(void);
 u32 get_device_type(void);
 void setup_clocks_for_console(void);
 void ddr_pll_config(unsigned int ddrpll_M);
+
+/*
+ * We have three pin mux functions that must exist.  We must be able to enable
+ * uart0, for initial output and i2c0 to read the main EEPROM.  We then have a
+ * main pinmux function that can be overridden to enable all other pinmux that
+ * is required on the board.
+ */
+void enable_uart0_pin_mux(void);
+void enable_i2c0_pin_mux(void);
+void enable_board_pin_mux(struct am335x_baseboard_id *header);
 #endif

board/ti/am335x/Makefile

@@ -18,7 +18,9 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).o
 
+ifdef CONFIG_SPL_BUILD
 COBJS	:= mux.o
+endif
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))

board/ti/am335x/mux.c

@@ -13,8 +13,8 @@
  * GNU General Public License for more details.
  */
 
-#include <config.h>
-#include <asm/arch/common_def.h>
+#include <common.h>
+#include <asm/arch/sys_proto.h>
 #include <asm/arch/hardware.h>
 #include <asm/io.h>
 
@@ -258,7 +258,6 @@ static struct module_pin_mux uart0_pin_mux[] = {
 	{-1},
 };
 
-#ifdef CONFIG_MMC
 static struct module_pin_mux mmc0_pin_mux[] = {
 	{OFFSET(mmc0_dat3), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_DAT3 */
 	{OFFSET(mmc0_dat2), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_DAT2 */
@@ -270,7 +269,17 @@ static struct module_pin_mux mmc0_pin_mux[] = {
 	{OFFSET(spi0_cs1), (MODE(5) | RXACTIVE | PULLUP_EN)},	/* MMC0_CD */
 	{-1},
 };
-#endif
+
+static struct module_pin_mux mmc0_pin_mux_sk_evm[] = {
+	{OFFSET(mmc0_dat3), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_DAT3 */
+	{OFFSET(mmc0_dat2), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_DAT2 */
+	{OFFSET(mmc0_dat1), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_DAT1 */
+	{OFFSET(mmc0_dat0), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_DAT0 */
+	{OFFSET(mmc0_clk), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_CLK */
+	{OFFSET(mmc0_cmd), (MODE(0) | RXACTIVE | PULLUP_EN)},	/* MMC0_CMD */
+	{OFFSET(spi0_cs1), (MODE(5) | RXACTIVE | PULLUP_EN)},	/* MMC0_CD */
+	{-1},
+};
 
 static struct module_pin_mux i2c0_pin_mux[] = {
 	{OFFSET(i2c0_sda), (MODE(0) | RXACTIVE |
@@ -349,34 +358,33 @@ void enable_uart0_pin_mux(void)
 	configure_module_pin_mux(uart0_pin_mux);
 }
 
-#ifdef CONFIG_MMC
-void enable_mmc0_pin_mux(void)
-{
-	configure_module_pin_mux(mmc0_pin_mux);
-}
-#endif
 
 void enable_i2c0_pin_mux(void)
 {
 	configure_module_pin_mux(i2c0_pin_mux);
 }
 
-void enable_i2c1_pin_mux(void)
+void enable_board_pin_mux(struct am335x_baseboard_id *header)
 {
+	/* Enable pinmux that is common to all TI boards. */
 	configure_module_pin_mux(i2c1_pin_mux);
-}
-
-void enable_rgmii1_pin_mux(void)
-{
-	configure_module_pin_mux(rgmii1_pin_mux);
-}
 
-void enable_mii1_pin_mux(void)
-{
-	configure_module_pin_mux(mii1_pin_mux);
-}
-
-void enable_gpio0_7_pin_mux(void)
-{
-	configure_module_pin_mux(gpio0_7_pin_mux);
+	/* Now do board-specific muxes. */
+	if (!strncmp(header->name, "A335BONE", HDR_NAME_LEN)) {
+		/* Beaglebone pinmux */
+		configure_module_pin_mux(mii1_pin_mux);
+		configure_module_pin_mux(mmc0_pin_mux);
+	} else if (!strncmp(header->config, "SKU#01", 6)) {
+		/* General Purpose EVM */
+		configure_module_pin_mux(rgmii1_pin_mux);
+		configure_module_pin_mux(mmc0_pin_mux);
+	} else if (!strncmp(header->name, "A335X_SK", HDR_NAME_LEN)) {
+		/* Starter Kit EVM */
+		configure_module_pin_mux(gpio0_7_pin_mux);
+		configure_module_pin_mux(rgmii1_pin_mux);
+		configure_module_pin_mux(mmc0_pin_mux_sk_evm);
+	} else {
+		puts("Unknown board, cannot configure pinmux.");
+		hang();
+	}
 }