board: ti: am64x: Add HSE NAND card detection support
Add expansion card detection support. Add NAND card detection support. Signed-off-by: Roger Quadros <rogerq@kernel.org> Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Roger Quadros
Praneeth Bajjuri
parent
a7f049e8ac
commit
9fc560f347
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@ -10,8 +10,10 @@
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#include <common.h>
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#include <asm/io.h>
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#include <env.h>
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#include <net.h>
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#include <spl.h>
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#include <fdt_support.h>
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#include <asm/gpio.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/sys_proto.h>
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@ -20,6 +22,17 @@
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#define board_is_am64x_gpevm() board_ti_k3_is("AM64-GPEVM")
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#define board_is_am64x_skevm() board_ti_k3_is("AM64-SKEVM")
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#define AM64X_MAX_DAUGHTER_CARDS 8
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/* Daughter card presence detection signals */
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enum {
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AM64X_EVM_HSE_BRD_DET,
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AM64X_EVM_BRD_DET_COUNT,
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};
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/* Max number of MAC addresses that are parsed/processed per daughter card */
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#define DAUGHTER_CARD_NO_OF_MAC_ADDR 8
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DECLARE_GLOBAL_DATA_PTR;
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int board_init(void)
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@ -160,10 +173,170 @@ static void setup_serial(void)
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snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
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env_set("serial#", serial_string);
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}
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#endif
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#endif
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#ifdef CONFIG_BOARD_LATE_INIT
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static const char *k3_dtbo_list[AM64X_MAX_DAUGHTER_CARDS] = {NULL};
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static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
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{
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int ret;
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memset(desc, 0, sizeof(*desc));
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ret = dm_gpio_lookup_name(gpio_name, desc);
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if (ret < 0) {
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pr_err("Failed to lookup gpio %s: %d\n", gpio_name, ret);
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return ret;
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}
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/* Request GPIO, simply re-using the name as label */
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ret = dm_gpio_request(desc, gpio_name);
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if (ret < 0) {
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pr_err("Failed to request gpio %s: %d\n", gpio_name, ret);
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return ret;
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}
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return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
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}
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static int probe_daughtercards(void)
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{
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struct ti_am6_eeprom ep;
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struct gpio_desc board_det_gpios[AM64X_EVM_BRD_DET_COUNT];
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char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
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u8 mac_addr_cnt;
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char name_overlays[1024] = { 0 };
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int i, nb_dtbos = 0;
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int ret;
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/*
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* Daughter card presence detection signal name to GPIO (via I2C I/O
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* expander @ address 0x38) name and EEPROM I2C address mapping.
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*/
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const struct {
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char *gpio_name;
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u8 i2c_addr;
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} slot_map[AM64X_EVM_BRD_DET_COUNT] = {
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{ "gpio@38_0", 0x52, }, /* AM64X_EVM_HSE_BRD_DET */
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};
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/* Declaration of daughtercards to probe */
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const struct {
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u8 slot_index; /* Slot the card is installed */
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char *card_name; /* EEPROM-programmed card name */
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char *dtbo_name; /* Device tree overlay to apply */
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u8 eth_offset; /* ethXaddr MAC address index offset */
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} cards[] = {
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{
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AM64X_EVM_HSE_BRD_DET,
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"TMDS64DC02EVM",
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"k3-am642-evm-nand.dtbo",
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0,
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},
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};
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/*
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* Initialize GPIO used for daughtercard slot presence detection and
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* keep the resulting handles in local array for easier access.
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*/
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for (i = 0; i < AM64X_EVM_BRD_DET_COUNT; i++) {
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ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
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&board_det_gpios[i]);
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if (ret < 0)
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return ret;
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}
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memset(k3_dtbo_list, 0, sizeof(k3_dtbo_list));
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for (i = 0; i < ARRAY_SIZE(cards); i++) {
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/* Obtain card-specific slot index and associated I2C address */
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u8 slot_index = cards[i].slot_index;
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u8 i2c_addr = slot_map[slot_index].i2c_addr;
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const char *dtboname;
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/*
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* The presence detection signal is active-low, hence skip
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* over this card slot if anything other than 0 is returned.
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*/
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ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
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if (ret < 0)
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return ret;
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else if (ret)
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continue;
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/* Get and parse the daughter card EEPROM record */
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ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS, i2c_addr,
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&ep,
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(char **)mac_addr,
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DAUGHTER_CARD_NO_OF_MAC_ADDR,
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&mac_addr_cnt);
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if (ret) {
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pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
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i2c_addr, ret);
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/*
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* Even this is pretty serious let's just skip over
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* this particular daughtercard, rather than ending
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* the probing process altogether.
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*/
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continue;
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}
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/* Only process the parsed data if we found a match */
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if (strncmp(ep.name, cards[i].card_name, sizeof(ep.name)))
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continue;
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printf("Detected: %s rev %s\n", ep.name, ep.version);
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#ifndef CONFIG_SPL_BUILD
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int j;
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/*
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* Populate any MAC addresses from daughtercard into the U-Boot
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* environment, starting with a card-specific offset so we can
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* have multiple cards contribute to the MAC pool in a well-
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* defined manner.
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*/
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for (j = 0; j < mac_addr_cnt; j++) {
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if (!is_valid_ethaddr((u8 *)mac_addr[j]))
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continue;
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eth_env_set_enetaddr_by_index("eth",
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cards[i].eth_offset + j,
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(uchar *)mac_addr[j]);
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}
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#endif
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/* Skip if no overlays are to be added */
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if (!strlen(cards[i].dtbo_name))
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continue;
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dtboname = cards[i].dtbo_name;
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k3_dtbo_list[nb_dtbos++] = dtboname;
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/*
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* Make sure we are not running out of buffer space by checking
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* if we can fit the new overlay, a trailing space to be used
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* as a separator, plus the terminating zero.
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*/
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if (strlen(name_overlays) + strlen(dtboname) + 2 >
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sizeof(name_overlays))
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return -ENOMEM;
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/* Append to our list of overlays */
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strcat(name_overlays, dtboname);
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strcat(name_overlays, " ");
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}
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#ifndef CONFIG_SPL_BUILD
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/* Apply device tree overlay(s) to the U-Boot environment, if any */
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if (strlen(name_overlays))
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return env_set("name_overlays", name_overlays);
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#endif
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return 0;
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}
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int board_late_init(void)
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{
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if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
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@ -178,6 +351,9 @@ int board_late_init(void)
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* an index of 1.
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*/
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board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
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/* Check for and probe any plugged-in daughtercards */
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probe_daughtercards();
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}
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return 0;
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