u-boot/board/ti/am65x/evm.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Board specific initialization for AM654 EVM
*
* Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
* Lokesh Vutla <lokeshvutla@ti.com>
*
*/
#include <common.h>
#include <dm.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/hardware.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/omap_common.h>
#include <spl.h>
#include <asm/arch/sys_proto.h>
#include "../common/board_detect.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
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;
}
ulong board_get_usable_ram_top(ulong 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 = CONFIG_SYS_SDRAM_BASE;
gd->bd->bi_dram[0].size = 0x80000000;
#ifdef CONFIG_PHYS_64BIT
/* Bank 1 declares the memory available in the DDR high region */
gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
gd->bd->bi_dram[1].size = 0x80000000;
#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
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
int ret;
ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
if (ret)
printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
return ret;
}
#endif
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;
}
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);
}
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\n", cards[i].card_name);
/*
* 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]);
}
/* 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;
}
int board_late_init(void)
{
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;
}