ti: AM335x: Use generic EEPROM detection logic

Use the generic EEPROM detection logic instead of duplicating the AM
eeprom logic.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Steven Kipisz <s-kipisz2@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/Kconfig

@@ -368,6 +368,7 @@ config TARGET_AM335X_EVM
 	select DM
 	select DM_SERIAL
 	select DM_GPIO
+	select TI_I2C_BOARD_DETECT
 
 config TARGET_AM335X_SL50
 	bool "Support am335x_sl50"

board/ti/am335x/Kconfig

@@ -38,4 +38,6 @@ config NOR_BOOT
 	  as the ROM only partially sets up pinmux.  We also default to using
 	  NOR for environment.
 
+source "board/ti/common/Kconfig"
+
 endif

board/ti/am335x/board.c

@@ -31,6 +31,7 @@
 #include <environment.h>
 #include <watchdog.h>
 #include <environment.h>
+#include "../common/board_detect.h"
 #include "board.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -46,43 +47,9 @@ static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
 /*
  * Read header information from EEPROM into global structure.
  */
-static int read_eeprom(struct am335x_baseboard_id *header)
+static inline int __maybe_unused read_eeprom(void)
 {
-	/* Check if baseboard eeprom is available */
-	if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) {
-		puts("Could not probe the EEPROM; something fundamentally "
-			"wrong on the I2C bus.\n");
-		return -ENODEV;
-	}
-
-	/* read the eeprom using i2c */
-	if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)header,
-		     sizeof(struct am335x_baseboard_id))) {
-		puts("Could not read the EEPROM; something fundamentally"
-			" wrong on the I2C bus.\n");
-		return -EIO;
-	}
-
-	if (header->magic != 0xEE3355AA) {
-		/*
-		 * read the eeprom using i2c again,
-		 * but use only a 1 byte address
-		 */
-		if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1, (uchar *)header,
-			     sizeof(struct am335x_baseboard_id))) {
-			puts("Could not read the EEPROM; something "
-				"fundamentally wrong on the I2C bus.\n");
-			return -EIO;
-		}
-
-		if (header->magic != 0xEE3355AA) {
-			printf("Incorrect magic number (0x%x) in EEPROM\n",
-					header->magic);
-			return -EINVAL;
-		}
-	}
-
-	return 0;
+	return ti_i2c_eeprom_am_get(-1, CONFIG_SYS_I2C_EEPROM_ADDR);
 }
 
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
@@ -223,16 +190,15 @@ const struct dpll_params dpll_ddr_bone_black = {
 
 void am33xx_spl_board_init(void)
 {
-	struct am335x_baseboard_id header;
 	int mpu_vdd;
 
-	if (read_eeprom(&header) < 0)
+	if (read_eeprom() < 0)
 		puts("Could not get board ID.\n");
 
 	/* Get the frequency */
 	dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);
 
-	if (board_is_bone(&header) || board_is_bone_lt(&header)) {
+	if (board_is_bone() || board_is_bone_lt()) {
 		/* BeagleBone PMIC Code */
 		int usb_cur_lim;
 
@@ -240,8 +206,7 @@ void am33xx_spl_board_init(void)
 		 * Only perform PMIC configurations if board rev > A1
 		 * on Beaglebone White
 		 */
-		if (board_is_bone(&header) && !strncmp(header.version,
-						       "00A1", 4))
+		if (board_is_bone() && !strncmp(board_ti_get_rev(), "00A1", 4))
 			return;
 
 		if (i2c_probe(TPS65217_CHIP_PM))
@@ -251,7 +216,7 @@ void am33xx_spl_board_init(void)
 		 * On Beaglebone White we need to ensure we have AC power
 		 * before increasing the frequency.
 		 */
-		if (board_is_bone(&header)) {
+		if (board_is_bone()) {
 			uchar pmic_status_reg;
 			if (tps65217_reg_read(TPS65217_STATUS,
 					      &pmic_status_reg))
@@ -266,7 +231,7 @@ void am33xx_spl_board_init(void)
 		 * Override what we have detected since we know if we have
 		 * a Beaglebone Black it supports 1GHz.
 		 */
-		if (board_is_bone_lt(&header))
+		if (board_is_bone_lt())
 			dpll_mpu_opp100.m = MPUPLL_M_1000;
 
 		/*
@@ -307,7 +272,7 @@ void am33xx_spl_board_init(void)
 		 * Set LDO3, LDO4 output voltage to 3.3V for Beaglebone.
 		 * Set LDO3 to 1.8V and LDO4 to 3.3V for Beaglebone Black.
 		 */
-		if (board_is_bone(&header)) {
+		if (board_is_bone()) {
 			if (tps65217_reg_write(TPS65217_PROT_LEVEL_2,
 					       TPS65217_DEFLS1,
 					       TPS65217_LDO_VOLTAGE_OUT_3_3,
@@ -367,18 +332,16 @@ void am33xx_spl_board_init(void)
 
 const struct dpll_params *get_dpll_ddr_params(void)
 {
-	struct am335x_baseboard_id header;
-
 	enable_i2c0_pin_mux();
 	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
-	if (read_eeprom(&header) < 0)
+	if (read_eeprom() < 0)
 		puts("Could not get board ID.\n");
 
-	if (board_is_evm_sk(&header))
+	if (board_is_evm_sk())
 		return &dpll_ddr_evm_sk;
-	else if (board_is_bone_lt(&header))
+	else if (board_is_bone_lt())
 		return &dpll_ddr_bone_black;
-	else if (board_is_evm_15_or_later(&header))
+	else if (board_is_evm_15_or_later())
 		return &dpll_ddr_evm_sk;
 	else
 		return &dpll_ddr;
@@ -403,12 +366,10 @@ void set_uart_mux_conf(void)
 
 void set_mux_conf_regs(void)
 {
-	__maybe_unused struct am335x_baseboard_id header;
-
-	if (read_eeprom(&header) < 0)
+	if (read_eeprom() < 0)
 		puts("Could not get board ID.\n");
 
-	enable_board_pin_mux(&header);
+	enable_board_pin_mux();
 }
 
 const struct ctrl_ioregs ioregs_evmsk = {
@@ -445,12 +406,10 @@ const struct ctrl_ioregs ioregs = {
 
 void sdram_init(void)
 {
-	__maybe_unused struct am335x_baseboard_id header;
-
-	if (read_eeprom(&header) < 0)
+	if (read_eeprom() < 0)
 		puts("Could not get board ID.\n");
 
-	if (board_is_evm_sk(&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.
@@ -459,15 +418,15 @@ void sdram_init(void)
 		gpio_direction_output(GPIO_DDR_VTT_EN, 1);
 	}
 
-	if (board_is_evm_sk(&header))
+	if (board_is_evm_sk())
 		config_ddr(303, &ioregs_evmsk, &ddr3_data,
 			   &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data, 0);
-	else if (board_is_bone_lt(&header))
+	else if (board_is_bone_lt())
 		config_ddr(400, &ioregs_bonelt,
 			   &ddr3_beagleblack_data,
 			   &ddr3_beagleblack_cmd_ctrl_data,
 			   &ddr3_beagleblack_emif_reg_data, 0);
-	else if (board_is_evm_15_or_later(&header))
+	else if (board_is_evm_15_or_later())
 		config_ddr(303, &ioregs_evm15, &ddr3_evm_data,
 			   &ddr3_evm_cmd_ctrl_data, &ddr3_evm_emif_reg_data, 0);
 	else
@@ -496,26 +455,16 @@ int board_init(void)
 int board_late_init(void)
 {
 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
-	char safe_string[HDR_NAME_LEN + 1];
-	struct am335x_baseboard_id header;
+	int rc;
+	char *name = NULL;
 
-	if (read_eeprom(&header) < 0)
+	rc = read_eeprom();
+	if (rc)
 		puts("Could not get board ID.\n");
 
-	/* Now set variables based on the header. */
-	strncpy(safe_string, (char *)header.name, sizeof(header.name));
-	safe_string[sizeof(header.name)] = 0;
-	setenv("board_name", safe_string);
-
-	/* BeagleBone Green eeprom, board_rev: 0x1a 0x00 0x00 0x00 */
-	if ( (header.version[0] == 0x1a) && (header.version[1] == 0x00) &&
-	     (header.version[2] == 0x00) && (header.version[3] == 0x00) ) {
-		setenv("board_rev", "BBG1");
-	} else {
-		strncpy(safe_string, (char *)header.version, sizeof(header.version));
-		safe_string[sizeof(header.version)] = 0;
-		setenv("board_rev", safe_string);
-	}
+	if (board_is_bbg1())
+		name = "BBG1";
+	set_board_info_env(name);
 #endif
 
 	return 0;
@@ -587,7 +536,7 @@ int board_eth_init(bd_t *bis)
 	int rv, n = 0;
 	uint8_t mac_addr[6];
 	uint32_t mac_hi, mac_lo;
-	__maybe_unused struct am335x_baseboard_id header;
+	__maybe_unused struct ti_am_eeprom *header;
 
 	/* try reading mac address from efuse */
 	mac_lo = readl(&cdev->macid0l);
@@ -624,11 +573,11 @@ int board_eth_init(bd_t *bis)
 			eth_setenv_enetaddr("eth1addr", mac_addr);
 	}
 
-	if (read_eeprom(&header) < 0)
+	if (read_eeprom() < 0)
 		puts("Could not get board ID.\n");
 
-	if (board_is_bone(&header) || board_is_bone_lt(&header) ||
-	    board_is_idk(&header)) {
+	if (board_is_bone() || board_is_bone_lt() ||
+	    board_is_idk()) {
 		writel(MII_MODE_ENABLE, &cdev->miisel);
 		cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if =
 				PHY_INTERFACE_MODE_MII;
@@ -657,7 +606,7 @@ int board_eth_init(bd_t *bis)
 #define AR8051_DEBUG_RGMII_CLK_DLY_REG	0x5
 #define AR8051_RGMII_TX_CLK_DLY		0x100
 
-	if (board_is_evm_sk(&header) || board_is_gp_evm(&header)) {
+	if (board_is_evm_sk() || board_is_gp_evm()) {
 		const char *devname;
 		devname = miiphy_get_current_dev();
 

board/ti/am335x/board.h

@@ -11,53 +11,40 @@
 #ifndef _BOARD_H_
 #define _BOARD_H_
 
-/*
- * TI 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];
-};
+static inline int board_is_bone(void)
+{
+	return board_ti_is("A335BONE");
+}
 
-static inline int board_is_bone(struct am335x_baseboard_id *header)
+static inline int board_is_bone_lt(void)
 {
-	return !strncmp(header->name, "A335BONE", HDR_NAME_LEN);
+	return board_ti_is("A335BNLT");
 }
 
-static inline int board_is_bone_lt(struct am335x_baseboard_id *header)
+static inline int board_is_bbg1(void)
 {
-	return !strncmp(header->name, "A335BNLT", HDR_NAME_LEN);
+	return board_is_bone_lt() && !strncmp(board_ti_get_rev(), "BBG1", 4);
 }
 
-static inline int board_is_evm_sk(struct am335x_baseboard_id *header)
+static inline int board_is_evm_sk(void)
 {
-	return !strncmp("A335X_SK", header->name, HDR_NAME_LEN);
+	return board_ti_is("A335X_SK");
 }
 
-static inline int board_is_idk(struct am335x_baseboard_id *header)
+static inline int board_is_idk(void)
 {
-	return !strncmp(header->config, "SKU#02", 6);
+	return !strncmp(board_ti_get_config(), "SKU#02", 6);
 }
 
-static inline int board_is_gp_evm(struct am335x_baseboard_id *header)
+static inline int board_is_gp_evm(void)
 {
-	return !strncmp("A33515BB", header->name, HDR_NAME_LEN);
+	return board_ti_is("A33515BB");
 }
 
-static inline int board_is_evm_15_or_later(struct am335x_baseboard_id *header)
+static inline int board_is_evm_15_or_later(void)
 {
-	return (board_is_gp_evm(header) &&
-		strncmp("1.5", header->version, 3) <= 0);
+	return (board_is_gp_evm() &&
+		strncmp("1.5", board_ti_get_rev(), 3) <= 0);
 }
 
 /*
@@ -73,5 +60,5 @@ void enable_uart3_pin_mux(void);
 void enable_uart4_pin_mux(void);
 void enable_uart5_pin_mux(void);
 void enable_i2c0_pin_mux(void);
-void enable_board_pin_mux(struct am335x_baseboard_id *header);
+void enable_board_pin_mux(void);
 #endif

board/ti/am335x/mux.c

@@ -19,6 +19,7 @@
 #include <asm/arch/mux.h>
 #include <asm/io.h>
 #include <i2c.h>
+#include "../common/board_detect.h"
 #include "board.h"
 
 static struct module_pin_mux uart0_pin_mux[] = {
@@ -312,10 +313,10 @@ static unsigned short detect_daughter_board_profile(void)
 	return (1 << (val & PROFILE_MASK));
 }
 
-void enable_board_pin_mux(struct am335x_baseboard_id *header)
+void enable_board_pin_mux(void)
 {
 	/* Do board-specific muxes. */
-	if (board_is_bone(header)) {
+	if (board_is_bone()) {
 		/* Beaglebone pinmux */
 		configure_module_pin_mux(mii1_pin_mux);
 		configure_module_pin_mux(mmc0_pin_mux);
@@ -326,7 +327,7 @@ void enable_board_pin_mux(struct am335x_baseboard_id *header)
 #else
 		configure_module_pin_mux(mmc1_pin_mux);
 #endif
-	} else if (board_is_gp_evm(header)) {
+	} else if (board_is_gp_evm()) {
 		/* General Purpose EVM */
 		unsigned short profile = detect_daughter_board_profile();
 		configure_module_pin_mux(rgmii1_pin_mux);
@@ -343,17 +344,17 @@ void enable_board_pin_mux(struct am335x_baseboard_id *header)
 			configure_module_pin_mux(mmc1_pin_mux);
 			configure_module_pin_mux(spi0_pin_mux);
 		}
-	} else if (board_is_idk(header)) {
+	} else if (board_is_idk()) {
 		/* Industrial Motor Control (IDK) */
 		configure_module_pin_mux(mii1_pin_mux);
 		configure_module_pin_mux(mmc0_no_cd_pin_mux);
-	} else if (board_is_evm_sk(header)) {
+	} else if (board_is_evm_sk()) {
 		/* Starter Kit EVM */
 		configure_module_pin_mux(i2c1_pin_mux);
 		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 if (board_is_bone_lt(header)) {
+	} else if (board_is_bone_lt()) {
 		/* Beaglebone LT pinmux */
 		configure_module_pin_mux(mii1_pin_mux);
 		configure_module_pin_mux(mmc0_pin_mux);