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>
19 #include <asm/arch/sys_proto.h>
21 #include "../common/board_detect.h"
23 #define board_is_am65x_base_board() board_ti_is("AM6-COMPROCEVM")
25 /* Daughter card presence detection signals */
27 AM65X_EVM_APP_BRD_DET,
28 AM65X_EVM_LCD_BRD_DET,
29 AM65X_EVM_SERDES_BRD_DET,
30 AM65X_EVM_HDMI_GPMC_BRD_DET,
31 AM65X_EVM_BRD_DET_COUNT,
34 /* Max number of MAC addresses that are parsed/processed per daughter card */
35 #define DAUGHTER_CARD_NO_OF_MAC_ADDR 8
37 DECLARE_GLOBAL_DATA_PTR;
46 #ifdef CONFIG_PHYS_64BIT
47 gd->ram_size = 0x100000000;
49 gd->ram_size = 0x80000000;
55 ulong board_get_usable_ram_top(ulong total_size)
57 #ifdef CONFIG_PHYS_64BIT
58 /* Limit RAM used by U-Boot to the DDR low region */
59 if (gd->ram_top > 0x100000000)
66 int dram_init_banksize(void)
68 /* Bank 0 declares the memory available in the DDR low region */
69 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
70 gd->bd->bi_dram[0].size = 0x80000000;
72 #ifdef CONFIG_PHYS_64BIT
73 /* Bank 1 declares the memory available in the DDR high region */
74 gd->bd->bi_dram[1].start = CONFIG_SYS_SDRAM_BASE1;
75 gd->bd->bi_dram[1].size = 0x80000000;
81 #ifdef CONFIG_SPL_LOAD_FIT
82 int board_fit_config_name_match(const char *name)
84 #ifdef CONFIG_TARGET_AM654_A53_EVM
85 if (!strcmp(name, "k3-am654-base-board"))
93 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
94 int ft_board_setup(void *blob, bd_t *bd)
98 ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
100 printf("%s: fixing up msmc ram failed %d\n", __func__, ret);
104 #if defined(CONFIG_TI_SECURE_DEVICE)
105 /* Make HW RNG reserved for secure world use */
106 ret = fdt_disable_node(blob, "/interconnect@100000/trng@4e10000");
108 printf("%s: disabling TRGN failed %d\n", __func__, ret);
117 int do_board_detect(void)
121 ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
122 CONFIG_EEPROM_CHIP_ADDRESS);
124 pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
125 CONFIG_EEPROM_CHIP_ADDRESS, ret);
130 static void setup_board_eeprom_env(void)
132 char *name = "am65x";
134 if (do_board_detect())
137 if (board_is_am65x_base_board())
140 printf("Unidentified board claims %s in eeprom header\n",
141 board_ti_get_name());
144 set_board_info_env_am6(name);
147 static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
151 memset(desc, 0, sizeof(*desc));
153 ret = dm_gpio_lookup_name(gpio_name, desc);
157 /* Request GPIO, simply re-using the name as label */
158 ret = dm_gpio_request(desc, gpio_name);
162 return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
165 static int probe_daughtercards(void)
167 struct ti_am6_eeprom ep;
168 struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
169 char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
171 char name_overlays[1024] = { 0 };
176 * Daughter card presence detection signal name to GPIO (via I2C I/O
177 * expander @ address 0x38) name and EEPROM I2C address mapping.
182 } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
183 { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
184 { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
185 { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
186 { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
189 /* Declaration of daughtercards to probe */
191 u8 slot_index; /* Slot the card is installed */
192 char *card_name; /* EEPROM-programmed card name */
193 char *dtbo_name; /* Device tree overlay to apply */
194 u8 eth_offset; /* ethXaddr MAC address index offset */
197 AM65X_EVM_APP_BRD_DET,
203 AM65X_EVM_APP_BRD_DET,
209 AM65X_EVM_SERDES_BRD_DET,
211 "k3-am654-pcie-usb2.dtbo",
215 AM65X_EVM_SERDES_BRD_DET,
217 "k3-am654-pcie-usb3.dtbo",
221 AM65X_EVM_LCD_BRD_DET,
223 "k3-am654-evm-oldi-lcd1evm.dtbo",
229 * Initialize GPIO used for daughtercard slot presence detection and
230 * keep the resulting handles in local array for easier access.
232 for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
233 ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
234 &board_det_gpios[i]);
239 for (i = 0; i < ARRAY_SIZE(cards); i++) {
240 /* Obtain card-specific slot index and associated I2C address */
241 u8 slot_index = cards[i].slot_index;
242 u8 i2c_addr = slot_map[slot_index].i2c_addr;
245 * The presence detection signal is active-low, hence skip
246 * over this card slot if anything other than 0 is returned.
248 ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
254 /* Get and parse the daughter card EEPROM record */
255 ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
258 DAUGHTER_CARD_NO_OF_MAC_ADDR,
261 pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
264 * Even this is pretty serious let's just skip over
265 * this particular daughtercard, rather than ending
266 * the probing process altogether.
271 /* Only process the parsed data if we found a match */
272 if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
275 printf("detected %s\n", cards[i].card_name);
278 * Populate any MAC addresses from daughtercard into the U-Boot
279 * environment, starting with a card-specific offset so we can
280 * have multiple cards contribute to the MAC pool in a well-
283 for (j = 0; j < mac_addr_cnt; j++) {
284 if (!is_valid_ethaddr((u8 *)mac_addr[j]))
287 eth_env_set_enetaddr_by_index("eth",
288 cards[i].eth_offset + j,
289 (uchar *)mac_addr[j]);
292 /* Skip if no overlays are to be added */
293 if (!strlen(cards[i].dtbo_name))
297 * Make sure we are not running out of buffer space by checking
298 * if we can fit the new overlay, a trailing space to be used
299 * as a separator, plus the terminating zero.
301 if (strlen(name_overlays) + strlen(cards[i].dtbo_name) + 2 >
302 sizeof(name_overlays))
305 /* Append to our list of overlays */
306 strcat(name_overlays, cards[i].dtbo_name);
307 strcat(name_overlays, " ");
310 /* Apply device tree overlay(s) to the U-Boot environment, if any */
311 if (strlen(name_overlays))
312 return env_set("name_overlays", name_overlays);
317 int board_late_init(void)
319 struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
321 setup_board_eeprom_env();
324 * The first MAC address for ethernet a.k.a. ethernet0 comes from
325 * efuse populated via the am654 gigabit eth switch subsystem driver.
326 * All the other ones are populated via EEPROM, hence continue with
329 board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
331 /* Check for and probe any plugged-in daughtercards */
332 probe_daughtercards();