*/
#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 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;
+}
projects / oweals / u-boot.git / commitdiff