BeagleBoard.org BeagleBone AI rev A1 does not include a board
identifier I2C EEPROM due to a design oversight. These boards have
been put into production and are generally available now.
The board identifier information, however, has been included in the
second eMMC linear boot partition (/dev/mmcblk1boot1).
This patch works by:
* First, looking for a board identifier I2C EEPROM and if not found,
* Then seeing if the boot mode matches BeagleBone AI with eMMC in the
boot chain to make sure we don't enable eMMC pinmuxes on boards
that don't support it, and
* Finally, initializes the eMMC pins and reading the header.
Signed-off-by: Jason Kridner <j...@ti.com>
Signed-off-by: Caleb Robey <c-ro...@ti.com>
Cc: Robert Nelson <robertcnel...@gmail.com>
---
board/ti/am57xx/board.c | 37 +++++++++++++++++
board/ti/am57xx/mux_data.h | 16 +++++++
board/ti/common/board_detect.c | 76 ++++++++++++++++++++++++++++++++++
board/ti/common/board_detect.h | 9 ++++
4 files changed, 138 insertions(+)
diff --git a/board/ti/am57xx/board.c b/board/ti/am57xx/board.c
index c755821b74..52f5e954e6 100644
--- a/board/ti/am57xx/board.c
+++ b/board/ti/am57xx/board.c
@@ -14,6 +14,7 @@
#include <sata.h>
#include <serial.h>
#include <usb.h>
+#include <errno.h>
#include <asm/omap_common.h>
#include <asm/omap_sec_common.h>
#include <asm/emif.h>
@@ -37,6 +38,10 @@
#include "../common/board_detect.h"
#include "mux_data.h"
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+static int board_bootmode_has_emmc(void);
+#endif
+
#define board_is_x15() board_ti_is("BBRDX15_")
#define board_is_x15_revb1() (board_ti_is("BBRDX15_") && \
!strncmp("B.10", board_ti_get_rev(), 3))
@@ -507,6 +512,14 @@ void do_board_detect(void)
CONFIG_EEPROM_CHIP_ADDRESS);
if (rc)
printf("ti_i2c_eeprom_init failed %d\n", rc);
+
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+ rc = board_bootmode_has_emmc();
+ if (!rc)
+ rc = ti_emmc_boardid_get();
+ if (rc)
+ printf("ti_emmc_boardid_get failed %d\n", rc);
+#endif
}
#else /* CONFIG_SPL_BUILD */
@@ -522,6 +535,14 @@ void do_board_detect(void)
if (rc)
printf("ti_i2c_eeprom_init failed %d\n", rc);
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+ rc = board_bootmode_has_emmc();
+ if (!rc)
+ rc = ti_emmc_boardid_get();
+ if (rc)
+ printf("ti_emmc_boardid_get failed %d\n", rc);
+#endif
+
if (board_is_x15())
bname = "BeagleBoard X15";
else if (board_is_am572x_evm())
@@ -744,6 +765,11 @@ void set_muxconf_regs(void)
{
do_set_mux32((*ctrl)->control_padconf_core_base,
early_padconf, ARRAY_SIZE(early_padconf));
+
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+ do_set_mux32((*ctrl)->control_padconf_core_base,
+ emmc_padconf, ARRAY_SIZE(emmc_padconf));
+#endif
}
#ifdef CONFIG_IODELAY_RECALIBRATION
@@ -1113,6 +1139,17 @@ int fastboot_set_reboot_flag(void)
}
#endif
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+static int board_bootmode_has_emmc(void)
+{
+ /* Check that boot mode is same as BBAI */
+ if (gd->arch.omap_boot_mode != 2)
+ return -EIO;
+
+ return 0;
+}
+#endif
+
#ifdef CONFIG_TI_SECURE_DEVICE
void board_fit_image_post_process(void **p_image, size_t *p_size)
{
diff --git a/board/ti/am57xx/mux_data.h b/board/ti/am57xx/mux_data.h
index d4a15ae93d..51df977817 100644
--- a/board/ti/am57xx/mux_data.h
+++ b/board/ti/am57xx/mux_data.h
@@ -1000,6 +1000,22 @@ const struct pad_conf_entry early_padconf[] = {
{I2C1_SCL, (PIN_INPUT_PULLUP | M0)}, /* I2C1_SCL */
};
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+const struct pad_conf_entry emmc_padconf[] = {
+ {GPMC_A19, (M1 | PIN_INPUT_PULLUP)}, /* K7:
gpmc_a19.mmc2_dat4 */
+ {GPMC_A20, (M1 | PIN_INPUT_PULLUP)}, /* M7:
gpmc_a20.mmc2_dat5 */
+ {GPMC_A21, (M1 | PIN_INPUT_PULLUP)}, /* J5:
gpmc_a21.mmc2_dat6 */
+ {GPMC_A22, (M1 | PIN_INPUT_PULLUP)}, /* K6:
gpmc_a22.mmc2_dat7 */
+ {GPMC_A23, (M1 | PIN_INPUT_PULLUP)}, /* J7:
gpmc_a23.mmc2_clk */
+ {GPMC_A24, (M1 | PIN_INPUT_PULLUP)}, /* J4:
gpmc_a24.mmc2_dat0 */
+ {GPMC_A25, (M1 | PIN_INPUT_PULLUP)}, /* J6:
gpmc_a25.mmc2_dat1 */
+ {GPMC_A26, (M1 | PIN_INPUT_PULLUP)}, /* H4:
gpmc_a26.mmc2_dat2 */
+ {GPMC_A27, (M1 | PIN_INPUT_PULLUP)}, /* H5:
gpmc_a27.mmc2_dat3 */
+ {GPMC_CS1, (M1 | PIN_INPUT_PULLUP)}, /* H6:
gpmc_cs1.mmc2_cmd */
+ {MCASP1_AXR5, (M14 | PIN_OUTPUT_PULLUP)}, /* F13:
eMMC_RSTn (missing on schematic): mcasp1_axr5.gpio5_7 */
+};
+#endif
+
#ifdef CONFIG_IODELAY_RECALIBRATION
const struct iodelay_cfg_entry iodelay_cfg_array_x15_sr1_1[] = {
{0x0114, 2980, 0}, /* CFG_GPMC_A0_IN */
diff --git a/board/ti/common/board_detect.c b/board/ti/common/board_detect.c
index 564d2f7046..59ec57062d 100644
--- a/board/ti/common/board_detect.c
+++ b/board/ti/common/board_detect.c
@@ -14,6 +14,9 @@
#include <dm/uclass.h>
#include <env.h>
#include <i2c.h>
+#include <mmc.h>
+#include <errno.h>
+#include <malloc.h>
#include "board_detect.h"
@@ -171,6 +174,79 @@ static int __maybe_unused ti_i2c_eeprom_get(int bus_addr,
int dev_addr,
return 0;
}
+int __maybe_unused ti_emmc_boardid_get(void)
+{
+ int rc;
+ struct udevice *dev;
+ struct mmc *mmc;
+ struct ti_common_eeprom *ep;
+ struct ti_am_eeprom brdid;
+ struct blk_desc *bdesc;
+ uchar *buffer;
+
+ ep = TI_EEPROM_DATA;
+ if (ep->header == TI_EEPROM_HEADER_MAGIC)
+ return 0; /* EEPROM has already been read */
+
+ /* Initialize with a known bad marker for emmc fails.. */
+ ep->header = TI_DEAD_EEPROM_MAGIC;
+ ep->name[0] = 0x0;
+ ep->version[0] = 0x0;
+ ep->serial[0] = 0x0;
+ ep->config[0] = 0x0;
+
+ /* uclass object initialization */
+ rc = mmc_initialize(NULL);
+ if (rc)
+ return rc;
+
+ /* Set device to /dev/mmcblk1 */
+ rc = uclass_get_device(UCLASS_MMC, 1, &dev);
+ if (rc)
+ return rc;
+
+ /* Grab the mmc device */
+ mmc = mmc_get_mmc_dev(dev);
+ if (!mmc)
+ return -ENODEV;
+
+ /* mmc hardware initialization routine */
+ mmc_init(mmc);
+
+ /* Set partition to /dev/mmcblk1boot1 */
+ rc = mmc_switch_part(mmc, 2);
+ if (rc)
+ return rc;
+
+ buffer = malloc(mmc->read_bl_len);
+ if (!buffer)
+ return -ENOMEM;
+
+ bdesc = mmc_get_blk_desc(mmc);
+
+ /* blk_dread returns the number of blocks read*/
+ if (blk_dread(bdesc, 0L, 1, buffer) != 1) {
+ rc = -EIO;
+ goto cleanup;
+ }
+
+ memcpy(&brdid, buffer, sizeof(brdid));
+
+ /* Write out the ep struct values */
+ ep->header = brdid.header;
+ strlcpy(ep->name, brdid.name, TI_EEPROM_HDR_NAME_LEN + 1);
+ ti_eeprom_string_cleanup(ep->name);
+ strlcpy(ep->version, brdid.version, TI_EEPROM_HDR_REV_LEN + 1);
+ ti_eeprom_string_cleanup(ep->version);
+ strlcpy(ep->serial, brdid.serial, TI_EEPROM_HDR_SERIAL_LEN + 1);
+ ti_eeprom_string_cleanup(ep->serial);
+
+cleanup:
+ free(buffer);
+
+ return rc;
+}
+
int __maybe_unused ti_i2c_eeprom_am_set(const char *name, const char *rev)
{
struct ti_common_eeprom *ep;
diff --git a/board/ti/common/board_detect.h b/board/ti/common/board_detect.h
index a45d8961b9..1a85b7fda9 100644
--- a/board/ti/common/board_detect.h
+++ b/board/ti/common/board_detect.h
@@ -267,6 +267,15 @@ struct ti_am6_eeprom {
*/
int ti_i2c_eeprom_am_get(int bus_addr, int dev_addr);
+/**
+ * ti_emmc_boardid_get() - Fetch board ID information from eMMC
+ *
+ * ep in SRAM is populated by the this function that is currently
+ * based on BeagleBone AI, but could be made more general across AM*
+ * platforms.
+ */
+int __maybe_unused ti_emmc_boardid_get(void);
+
/**
* ti_i2c_eeprom_dra7_get() - Consolidated eeprom data for DRA7 TI EVMs
* @bus_addr: I2C bus address
--
2.17.1
