board/ti/am65x/evm.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Board specific initialization for AM654 EVM
  *
  * Copyright (C) 2017-2018 Texas Instruments Incorporated - https://www.ti.com/
  *	Lokesh Vutla <lokeshvutla@ti.com>
  *
  */

 #include <dm.h>
 #include <fdt_support.h>
 #include <image.h>
 #include <init.h>
 #include <net.h>
 #include <asm/arch/hardware.h>
 #include <asm/global_data.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
 #include <asm/omap_common.h>
 #include <env.h>
 #include <spl.h>
 #include <linux/printk.h>

 #include "../common/board_detect.h"
 #include "../common/fdt_ops.h"

 #define board_is_am65x_base_board()	board_ti_is("AM6-COMPROCEVM")

 /* Daughter card presence detection signals */
 enum {
 	AM65X_EVM_APP_BRD_DET,
 	AM65X_EVM_LCD_BRD_DET,
 	AM65X_EVM_SERDES_BRD_DET,
 	AM65X_EVM_HDMI_GPMC_BRD_DET,
 	AM65X_EVM_BRD_DET_COUNT,
 };

 /* Max number of MAC addresses that are parsed/processed per daughter card */
 #define DAUGHTER_CARD_NO_OF_MAC_ADDR	8

 /* Regiter that controls the SERDES0 lane and clock assignment */
 #define CTRLMMR_SERDES0_CTRL    0x00104080
 #define PCIE_LANE0              0x1

 DECLARE_GLOBAL_DATA_PTR;

 int board_init(void)
 {
 	return 0;
 }

 int dram_init(void)
 {
 #ifdef CONFIG_PHYS_64BIT
 	gd->ram_size = 0x100000000;
 #else
 	gd->ram_size = 0x80000000;
 #endif

 	return 0;
 }

 phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
 {
 #ifdef CONFIG_PHYS_64BIT
 	/* Limit RAM used by U-Boot to the DDR low region */
 	if (gd->ram_top > 0x100000000)
 		return 0x100000000;
 #endif

 	return gd->ram_top;
 }

 int dram_init_banksize(void)
 {
 	/* Bank 0 declares the memory available in the DDR low region */
 	gd->bd->bi_dram[0].start = 0x80000000;
 	gd->bd->bi_dram[0].size = 0x80000000;
 	gd->ram_size = 0x80000000;

 #ifdef CONFIG_PHYS_64BIT
 	/* Bank 1 declares the memory available in the DDR high region */
 	gd->bd->bi_dram[1].start = 0x880000000;
 	gd->bd->bi_dram[1].size = 0x80000000;
 	gd->ram_size = 0x100000000;
 #endif

 	return 0;
 }

 #ifdef CONFIG_SPL_LOAD_FIT
 int board_fit_config_name_match(const char *name)
 {
 #ifdef CONFIG_TARGET_AM654_A53_EVM
 	if (!strcmp(name, "k3-am654-base-board"))
 		return 0;
 #endif

 	return -1;
 }
 #endif

 #ifdef CONFIG_TI_I2C_BOARD_DETECT
 int do_board_detect(void)
 {
 	int ret;

 	ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
 					 CONFIG_EEPROM_CHIP_ADDRESS);
 	if (ret)
 		pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
 		       CONFIG_EEPROM_CHIP_ADDRESS, ret);

 	return ret;
 }

 int checkboard(void)
 {
 	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;

 	if (do_board_detect())
 		/* EEPROM not populated */
 		printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
 	else
 		printf("Board: %s rev %s\n", ep->name, ep->version);

 	return 0;
 }

 static void setup_board_eeprom_env(void)
 {
 	char *name = "am65x";

 	if (do_board_detect())
 		goto invalid_eeprom;

 	if (board_is_am65x_base_board())
 		name = "am65x";
 	else
 		printf("Unidentified board claims %s in eeprom header\n",
 		       board_ti_get_name());

 invalid_eeprom:
 	set_board_info_env_am6(name);
 	ti_set_fdt_env(NULL, NULL);
 }

 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
 {
 	int ret;

 	memset(desc, 0, sizeof(*desc));

 	ret = dm_gpio_lookup_name(gpio_name, desc);
 	if (ret < 0)
 		return ret;

 	/* Request GPIO, simply re-using the name as label */
 	ret = dm_gpio_request(desc, gpio_name);
 	if (ret < 0)
 		return ret;

 	return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
 }

 static int probe_daughtercards(void)
 {
 	struct ti_am6_eeprom ep;
 	struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
 	char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
 	u8 mac_addr_cnt;
 	char name_overlays[1024] = { 0 };
 	int i, j;
 	int ret;

 	/*
 	 * Daughter card presence detection signal name to GPIO (via I2C I/O
 	 * expander @ address 0x38) name and EEPROM I2C address mapping.
 	 */
 	const struct {
 		char *gpio_name;
 		u8 i2c_addr;
 	} slot_map[AM65X_EVM_BRD_DET_COUNT] = {
 		{ "gpio@38_0", 0x52, },	/* AM65X_EVM_APP_BRD_DET */
 		{ "gpio@38_1", 0x55, },	/* AM65X_EVM_LCD_BRD_DET */
 		{ "gpio@38_2", 0x54, },	/* AM65X_EVM_SERDES_BRD_DET */
 		{ "gpio@38_3", 0x53, },	/* AM65X_EVM_HDMI_GPMC_BRD_DET */
 	};

 	/* Declaration of daughtercards to probe */
 	const struct {
 		u8 slot_index;		/* Slot the card is installed */
 		char *card_name;	/* EEPROM-programmed card name */
 		char *dtbo_name;	/* Device tree overlay to apply */
 		u8 eth_offset;		/* ethXaddr MAC address index offset */
 	} cards[] = {
 		{
 			AM65X_EVM_APP_BRD_DET,
 			"AM6-GPAPPEVM",
 			"k3-am654-gp.dtbo",
 			0,
 		},
 		{
 			AM65X_EVM_APP_BRD_DET,
 			"AM6-IDKAPPEVM",
 			"k3-am654-idk.dtbo",
 			3,
 		},
 		{
 			AM65X_EVM_SERDES_BRD_DET,
 			"SER-PCIE2LEVM",
 			"k3-am654-pcie-usb2.dtbo",
 			0,
 		},
 		{
 			AM65X_EVM_SERDES_BRD_DET,
 			"SER-PCIEUSBEVM",
 			"k3-am654-pcie-usb3.dtbo",
 			0,
 		},
 		{
 			AM65X_EVM_LCD_BRD_DET,
 			"OLDI-LCD1EVM",
 			"k3-am654-evm-oldi-lcd1evm.dtbo",
 			0,
 		},
 	};

 	/*
 	 * Initialize GPIO used for daughtercard slot presence detection and
 	 * keep the resulting handles in local array for easier access.
 	 */
 	for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
 		ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
 						 &board_det_gpios[i]);
 		if (ret < 0)
 			return ret;
 	}

 	for (i = 0; i < ARRAY_SIZE(cards); i++) {
 		/* Obtain card-specific slot index and associated I2C address */
 		u8 slot_index = cards[i].slot_index;
 		u8 i2c_addr = slot_map[slot_index].i2c_addr;

 		/*
 		 * The presence detection signal is active-low, hence skip
 		 * over this card slot if anything other than 0 is returned.
 		 */
 		ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
 		if (ret < 0)
 			return ret;
 		else if (ret)
 			continue;

 		/* Get and parse the daughter card EEPROM record */
 		ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
 					    &ep,
 					    (char **)mac_addr,
 					    DAUGHTER_CARD_NO_OF_MAC_ADDR,
 					    &mac_addr_cnt);
 		if (ret) {
 			pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
 			       i2c_addr, ret);
 			/*
 			 * Even this is pretty serious let's just skip over
 			 * this particular daughtercard, rather than ending
 			 * the probing process altogether.
 			 */
 			continue;
 		}

 		/* Only process the parsed data if we found a match */
 		if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
 			continue;

 		printf("Detected: %s rev %s\n", ep.name, ep.version);

 		/*
 		 * Populate any MAC addresses from daughtercard into the U-Boot
 		 * environment, starting with a card-specific offset so we can
 		 * have multiple cards contribute to the MAC pool in a well-
 		 * defined manner.
 		 */
 		for (j = 0; j < mac_addr_cnt; j++) {
 			if (!is_valid_ethaddr((u8 *)mac_addr[j]))
 				continue;

 			eth_env_set_enetaddr_by_index("eth",
 						      cards[i].eth_offset + j,
 						      (uchar *)mac_addr[j]);
 		}

 		/*
 		 * It has been observed that setting SERDES0 lane mux to USB prevents USB
 		 * 2.0 operation on USB0. Setting SERDES0 lane mux to non-USB when USB0 is
 		 * used in USB 2.0 only mode solves this issue. For USB3.0+2.0 operation
 		 * this issue is not present.
 		 *
 		 * Implement this workaround by writing 1 to LANE_FUNC_SEL field in
 		 * CTRLMMR_SERDES0_CTRL register.
 		 */
 		if (!strncmp(ep.name, "SER-PCIE2LEVM", sizeof(ep.name)))
 			writel(PCIE_LANE0, CTRLMMR_SERDES0_CTRL);

 		/* Skip if no overlays are to be added */
 		if (!strlen(cards[i].dtbo_name))
 			continue;

 		/*
 		 * Make sure we are not running out of buffer space by checking
 		 * if we can fit the new overlay, a trailing space to be used
 		 * as a separator, plus the terminating zero.
 		 */
 		if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
 		    sizeof(name_overlays))
 			return -ENOMEM;

 		/* Append to our list of overlays */
 		strcat(name_overlays, cards[i].dtbo_name);
 		strcat(name_overlays, " ");
 	}

 	/* Apply device tree overlay(s) to the U-Boot environment, if any */
 	if (strlen(name_overlays))
 		return env_set("name_overlays", name_overlays);

 	return 0;
 }
 #endif

 int board_late_init(void)
 {
 	if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
 		struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;

 		setup_board_eeprom_env();

 		/*
 		 * The first MAC address for ethernet a.k.a. ethernet0 comes from
 		 * efuse populated via the am654 gigabit eth switch subsystem driver.
 		 * All the other ones are populated via EEPROM, hence continue with
 		 * an index of 1.
 		 */
 		board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);

 		/* Check for and probe any plugged-in daughtercards */
 		probe_daughtercards();
 	}

 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Board specific initialization for AM654 EVM
	*
	* Copyright (C) 2017-2018 Texas Instruments Incorporated - https://www.ti.com/
	* Lokesh Vutla <lokeshvutla@ti.com>
	*
	*/

	#include <dm.h>
	#include <fdt_support.h>
	#include <image.h>
	#include <init.h>
	#include <net.h>
	#include <asm/arch/hardware.h>
	#include <asm/global_data.h>
	#include <asm/gpio.h>
	#include <asm/io.h>
	#include <asm/omap_common.h>
	#include <env.h>
	#include <spl.h>
	#include <linux/printk.h>

	#include "../common/board_detect.h"
	#include "../common/fdt_ops.h"

	#define board_is_am65x_base_board() board_ti_is("AM6-COMPROCEVM")

	/* Daughter card presence detection signals */
	enum {
	AM65X_EVM_APP_BRD_DET,
	AM65X_EVM_LCD_BRD_DET,
	AM65X_EVM_SERDES_BRD_DET,
	AM65X_EVM_HDMI_GPMC_BRD_DET,
	AM65X_EVM_BRD_DET_COUNT,
	};

	/* Max number of MAC addresses that are parsed/processed per daughter card */
	#define DAUGHTER_CARD_NO_OF_MAC_ADDR 8

	/* Regiter that controls the SERDES0 lane and clock assignment */
	#define CTRLMMR_SERDES0_CTRL 0x00104080
	#define PCIE_LANE0 0x1

	DECLARE_GLOBAL_DATA_PTR;

	int board_init(void)
	{
	return 0;
	}

	int dram_init(void)
	{
	#ifdef CONFIG_PHYS_64BIT
	gd->ram_size = 0x100000000;
	#else
	gd->ram_size = 0x80000000;
	#endif

	return 0;
	}

	phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
	{
	#ifdef CONFIG_PHYS_64BIT
	/* Limit RAM used by U-Boot to the DDR low region */
	if (gd->ram_top > 0x100000000)
	return 0x100000000;
	#endif

	return gd->ram_top;
	}

	int dram_init_banksize(void)
	{
	/* Bank 0 declares the memory available in the DDR low region */
	gd->bd->bi_dram[0].start = 0x80000000;
	gd->bd->bi_dram[0].size = 0x80000000;
	gd->ram_size = 0x80000000;

	#ifdef CONFIG_PHYS_64BIT
	/* Bank 1 declares the memory available in the DDR high region */
	gd->bd->bi_dram[1].start = 0x880000000;
	gd->bd->bi_dram[1].size = 0x80000000;
	gd->ram_size = 0x100000000;
	#endif

	return 0;
	}

	#ifdef CONFIG_SPL_LOAD_FIT
	int board_fit_config_name_match(const char *name)
	{
	#ifdef CONFIG_TARGET_AM654_A53_EVM
	if (!strcmp(name, "k3-am654-base-board"))
	return 0;
	#endif

	return -1;
	}
	#endif

	#ifdef CONFIG_TI_I2C_BOARD_DETECT
	int do_board_detect(void)
	{
	int ret;

	ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
	CONFIG_EEPROM_CHIP_ADDRESS);
	if (ret)
	pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
	CONFIG_EEPROM_CHIP_ADDRESS, ret);

	return ret;
	}

	int checkboard(void)
	{
	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;

	if (do_board_detect())
	/* EEPROM not populated */
	printf("Board: %s rev %s\n", "AM6-COMPROCEVM", "E3");
	else
	printf("Board: %s rev %s\n", ep->name, ep->version);

	return 0;
	}

	static void setup_board_eeprom_env(void)
	{
	char *name = "am65x";

	if (do_board_detect())
	goto invalid_eeprom;

	if (board_is_am65x_base_board())
	name = "am65x";
	else
	printf("Unidentified board claims %s in eeprom header\n",
	board_ti_get_name());

	invalid_eeprom:
	set_board_info_env_am6(name);
	ti_set_fdt_env(NULL, NULL);
	}

	static int init_daughtercard_det_gpio(char gpio_name, struct gpio_desc desc)
	{
	int ret;

	memset(desc, 0, sizeof(*desc));

	ret = dm_gpio_lookup_name(gpio_name, desc);
	if (ret < 0)
	return ret;

	/* Request GPIO, simply re-using the name as label */
	ret = dm_gpio_request(desc, gpio_name);
	if (ret < 0)
	return ret;

	return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
	}

	static int probe_daughtercards(void)
	{
	struct ti_am6_eeprom ep;
	struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
	char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
	u8 mac_addr_cnt;
	char name_overlays[1024] = { 0 };
	int i, j;
	int ret;

	/*
	* Daughter card presence detection signal name to GPIO (via I2C I/O
	* expander @ address 0x38) name and EEPROM I2C address mapping.
	*/
	const struct {
	char *gpio_name;
	u8 i2c_addr;
	} slot_map[AM65X_EVM_BRD_DET_COUNT] = {
	{ "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
	{ "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
	{ "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
	{ "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
	};

	/* Declaration of daughtercards to probe */
	const struct {
	u8 slot_index; /* Slot the card is installed */
	char card_name; / EEPROM-programmed card name */
	char dtbo_name; / Device tree overlay to apply */
	u8 eth_offset; /* ethXaddr MAC address index offset */
	} cards[] = {
	{
	AM65X_EVM_APP_BRD_DET,
	"AM6-GPAPPEVM",
	"k3-am654-gp.dtbo",
	0,
	},
	{
	AM65X_EVM_APP_BRD_DET,
	"AM6-IDKAPPEVM",
	"k3-am654-idk.dtbo",
	3,
	},
	{
	AM65X_EVM_SERDES_BRD_DET,
	"SER-PCIE2LEVM",
	"k3-am654-pcie-usb2.dtbo",
	0,
	},
	{
	AM65X_EVM_SERDES_BRD_DET,
	"SER-PCIEUSBEVM",
	"k3-am654-pcie-usb3.dtbo",
	0,
	},
	{
	AM65X_EVM_LCD_BRD_DET,
	"OLDI-LCD1EVM",
	"k3-am654-evm-oldi-lcd1evm.dtbo",
	0,
	},
	};

	/*
	* Initialize GPIO used for daughtercard slot presence detection and
	* keep the resulting handles in local array for easier access.
	*/
	for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
	ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
	&board_det_gpios[i]);
	if (ret < 0)
	return ret;
	}

	for (i = 0; i < ARRAY_SIZE(cards); i++) {
	/* Obtain card-specific slot index and associated I2C address */
	u8 slot_index = cards[i].slot_index;
	u8 i2c_addr = slot_map[slot_index].i2c_addr;

	/*
	* The presence detection signal is active-low, hence skip
	* over this card slot if anything other than 0 is returned.
	*/
	ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
	if (ret < 0)
	return ret;
	else if (ret)
	continue;

	/* Get and parse the daughter card EEPROM record */
	ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
	&ep,
	(char **)mac_addr,
	DAUGHTER_CARD_NO_OF_MAC_ADDR,
	&mac_addr_cnt);
	if (ret) {
	pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
	i2c_addr, ret);
	/*
	* Even this is pretty serious let's just skip over
	* this particular daughtercard, rather than ending
	* the probing process altogether.
	*/
	continue;
	}

	/* Only process the parsed data if we found a match */
	if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
	continue;

	printf("Detected: %s rev %s\n", ep.name, ep.version);

	/*
	* Populate any MAC addresses from daughtercard into the U-Boot
	* environment, starting with a card-specific offset so we can
	* have multiple cards contribute to the MAC pool in a well-
	* defined manner.
	*/
	for (j = 0; j < mac_addr_cnt; j++) {
	if (!is_valid_ethaddr((u8 *)mac_addr[j]))
	continue;

	eth_env_set_enetaddr_by_index("eth",
	cards[i].eth_offset + j,
	(uchar *)mac_addr[j]);
	}

	/*
	* It has been observed that setting SERDES0 lane mux to USB prevents USB
	* 2.0 operation on USB0. Setting SERDES0 lane mux to non-USB when USB0 is
	* used in USB 2.0 only mode solves this issue. For USB3.0+2.0 operation
	* this issue is not present.
	*
	* Implement this workaround by writing 1 to LANE_FUNC_SEL field in
	* CTRLMMR_SERDES0_CTRL register.
	*/
	if (!strncmp(ep.name, "SER-PCIE2LEVM", sizeof(ep.name)))
	writel(PCIE_LANE0, CTRLMMR_SERDES0_CTRL);

	/* Skip if no overlays are to be added */
	if (!strlen(cards[i].dtbo_name))
	continue;

	/*
	* Make sure we are not running out of buffer space by checking
	* if we can fit the new overlay, a trailing space to be used
	* as a separator, plus the terminating zero.
	*/
	if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
	sizeof(name_overlays))
	return -ENOMEM;

	/* Append to our list of overlays */
	strcat(name_overlays, cards[i].dtbo_name);
	strcat(name_overlays, " ");
	}

	/* Apply device tree overlay(s) to the U-Boot environment, if any */
	if (strlen(name_overlays))
	return env_set("name_overlays", name_overlays);

	return 0;
	}
	#endif

	int board_late_init(void)
	{
	if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;

	setup_board_eeprom_env();

	/*
	* The first MAC address for ethernet a.k.a. ethernet0 comes from
	* efuse populated via the am654 gigabit eth switch subsystem driver.
	* All the other ones are populated via EEPROM, hence continue with
	* an index of 1.
	*/
	board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);

	/* Check for and probe any plugged-in daughtercards */
	probe_daughtercards();
	}

	return 0;
	}