1 // SPDX-License-Identifier: GPL-2.0+
3 * Board specific initialization for AM654 EVM
5 * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
6 * Lokesh Vutla <lokeshvutla@ti.com>
12 #include <asm/arch/sys_proto.h>
13 #include <asm/arch/hardware.h>
16 #include <asm/omap_common.h>
18 #include <asm/arch/sys_proto.h>
20 #include "../common/board_detect.h"
22 #define board_is_am65x_base_board() board_ti_is("AM6-COMPROCEVM")
24 /* Daughter card presence detection signals */
26 AM65X_EVM_APP_BRD_DET,
27 AM65X_EVM_LCD_BRD_DET,
28 AM65X_EVM_SERDES_BRD_DET,
29 AM65X_EVM_HDMI_GPMC_BRD_DET,
30 AM65X_EVM_BRD_DET_COUNT,
33 /* Max number of MAC addresses that are parsed/processed per daughter card */
34 #define DAUGHTER_CARD_NO_OF_MAC_ADDR 8
36 DECLARE_GLOBAL_DATA_PTR;
45 #ifdef CONFIG_PHYS_64BIT
46 gd->ram_size = 0x100000000;
48 gd->ram_size = 0x80000000;
54 ulong board_get_usable_ram_top(ulong total_size)
56 #ifdef CONFIG_PHYS_64BIT
57 /* Limit RAM used by U-Boot to the DDR low region */
58 if (gd->ram_top > 0x100000000)
65 int dram_init_banksize(void)
67 /* Bank 0 declares the memory available in the DDR low region */
68 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
69 gd->bd->bi_dram[0].size = 0x80000000;
71 #ifdef CONFIG_PHYS_64BIT
72 /* Bank 1 declares the memory available in the DDR high region */
73 gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
74 gd->bd->bi_dram[1].size = 0x80000000;
80 #ifdef CONFIG_SPL_LOAD_FIT
81 int board_fit_config_name_match(const char *name)
83 #ifdef CONFIG_TARGET_AM654_A53_EVM
84 if (!strcmp(name, "k3-am654-base-board"))
92 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
93 int ft_board_setup(void *blob, bd_t *bd)
97 ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
99 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
105 int do_board_detect(void)
109 ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
110 CONFIG_EEPROM_CHIP_ADDRESS);
112 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
113 CONFIG_EEPROM_CHIP_ADDRESS, ret);
118 static void setup_board_eeprom_env(void)
120 char *name = "am65x";
122 if (do_board_detect())
125 if (board_is_am65x_base_board())
128 printf("Unidentified board claims %s in eeprom header\n",
129 board_ti_get_name());
132 set_board_info_env_am6(name);
135 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
139 memset(desc, 0, sizeof(*desc));
141 ret = dm_gpio_lookup_name(gpio_name, desc);
145 /* Request GPIO, simply re-using the name as label */
146 ret = dm_gpio_request(desc, gpio_name);
150 return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
153 static int probe_daughtercards(void)
155 struct ti_am6_eeprom ep;
156 struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
157 char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
159 char name_overlays[1024] = { 0 };
164 * Daughter card presence detection signal name to GPIO (via I2C I/O
165 * expander @ address 0x38) name and EEPROM I2C address mapping.
170 } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
171 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
172 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
173 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
174 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
177 /* Declaration of daughtercards to probe */
179 u8 slot_index; /* Slot the card is installed */
180 char *card_name; /* EEPROM-programmed card name */
181 char *dtbo_name; /* Device tree overlay to apply */
182 u8 eth_offset; /* ethXaddr MAC address index offset */
185 AM65X_EVM_APP_BRD_DET,
191 AM65X_EVM_APP_BRD_DET,
197 AM65X_EVM_SERDES_BRD_DET,
199 "k3-am654-pcie-usb2.dtbo",
203 AM65X_EVM_SERDES_BRD_DET,
205 "k3-am654-pcie-usb3.dtbo",
209 AM65X_EVM_LCD_BRD_DET,
211 "k3-am654-evm-oldi-lcd1evm.dtbo",
217 * Initialize GPIO used for daughtercard slot presence detection and
218 * keep the resulting handles in local array for easier access.
220 for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
221 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
222 &board_det_gpios[i]);
227 for (i = 0; i < ARRAY_SIZE(cards); i++) {
228 /* Obtain card-specific slot index and associated I2C address */
229 u8 slot_index = cards[i].slot_index;
230 u8 i2c_addr = slot_map[slot_index].i2c_addr;
233 * The presence detection signal is active-low, hence skip
234 * over this card slot if anything other than 0 is returned.
236 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
242 /* Get and parse the daughter card EEPROM record */
243 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
246 DAUGHTER_CARD_NO_OF_MAC_ADDR,
249 pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
252 * Even this is pretty serious let's just skip over
253 * this particular daughtercard, rather than ending
254 * the probing process altogether.
259 /* Only process the parsed data if we found a match */
260 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
263 printf("detected %s\n", cards[i].card_name);
266 * Populate any MAC addresses from daughtercard into the U-Boot
267 * environment, starting with a card-specific offset so we can
268 * have multiple cards contribute to the MAC pool in a well-
271 for (j = 0; j < mac_addr_cnt; j++) {
272 if (!is_valid_ethaddr((u8 *)mac_addr[j]))
275 eth_env_set_enetaddr_by_index("eth",
276 cards[i].eth_offset + j,
277 (uchar *)mac_addr[j]);
280 /* Skip if no overlays are to be added */
281 if (!strlen(cards[i].dtbo_name))
285 * Make sure we are not running out of buffer space by checking
286 * if we can fit the new overlay, a trailing space to be used
287 * as a separator, plus the terminating zero.
289 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
290 sizeof(name_overlays))
293 /* Append to our list of overlays */
294 strcat(name_overlays, cards[i].dtbo_name);
295 strcat(name_overlays, " ");
298 /* Apply device tree overlay(s) to the U-Boot environment, if any */
299 if (strlen(name_overlays))
300 return env_set("name_overlays", name_overlays);
305 int board_late_init(void)
307 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
309 setup_board_eeprom_env();
312 * The first MAC address for ethernet a.k.a. ethernet0 comes from
313 * efuse populated via the am654 gigabit eth switch subsystem driver.
314 * All the other ones are populated via EEPROM, hence continue with
317 board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
319 /* Check for and probe any plugged-in daughtercards */
320 probe_daughtercards();