1 files changed, 318 insertions, 0 deletions
diff --git a/board/ti/common/board_detect.c b/board/ti/common/board_detect.c
new file mode 100644
index 0000000000..e0ae1a51a6
--- /dev/null
+++ b/board/ti/common/board_detect.c
@@ -0,0 +1,318 @@
+/*
+ * Library to support early TI EVM EEPROM handling
+ *
+ * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
+ *	Lokesh Vutla
+ *	Steve Kipisz
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/omap_common.h>
+#include <i2c.h>
+
+#include "board_detect.h"
+
+/**
+ * ti_i2c_eeprom_init - Initialize an i2c bus and probe for a device
+ * @i2c_bus: i2c bus number to initialize
+ * @dev_addr: Device address to probe for
+ *
+ * Return: 0 on success or corresponding error on failure.
+ */
+static int __maybe_unused ti_i2c_eeprom_init(int i2c_bus, int dev_addr)
+{
+	int rc;
+
+	if (i2c_bus >= 0) {
+		rc = i2c_set_bus_num(i2c_bus);
+		if (rc)
+			return rc;
+	}
+
+	return i2c_probe(dev_addr);
+}
+
+/**
+ * ti_i2c_eeprom_read - Read data from an EEPROM
+ * @dev_addr: The device address of the EEPROM
+ * @offset: Offset to start reading in the EEPROM
+ * @ep: Pointer to a buffer to read into
+ * @epsize: Size of buffer
+ *
+ * Return: 0 on success or corresponding result of i2c_read
+ */
+static int __maybe_unused ti_i2c_eeprom_read(int dev_addr, int offset,
+					     uchar *ep, int epsize)
+{
+	return i2c_read(dev_addr, offset, 2, ep, epsize);
+}
+
+/**
+ * ti_eeprom_string_cleanup() - Handle eeprom programming errors
+ * @s:	eeprom string (should be NULL terminated)
+ *
+ * Some Board manufacturers do not add a NULL termination at the
+ * end of string, instead some binary information is kludged in, hence
+ * convert the string to just printable characters of ASCII chart.
+ */
+static void __maybe_unused ti_eeprom_string_cleanup(char *s)
+{
+	int i, l;
+
+	l = strlen(s);
+	for (i = 0; i < l; i++, s++)
+		if (*s < ' ' || *s > '~') {
+			*s = 0;
+			break;
+		}
+}
+
+__weak void gpi2c_init(void)
+{
+}
+
+static int __maybe_unused ti_i2c_eeprom_get(int bus_addr, int dev_addr,
+					    u32 header, u32 size, uint8_t *ep)
+{
+	u32 byte, hdr_read;
+	int rc;
+
+	gpi2c_init();
+	rc = ti_i2c_eeprom_init(bus_addr, dev_addr);
+	if (rc)
+		return rc;
+
+	/*
+	 * Read the header first then only read the other contents.
+	 */
+	byte = 2;
+	rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read, 4);
+	if (rc)
+		return rc;
+
+	/* Corrupted data??? */
+	if (hdr_read != header) {
+		rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read, 4);
+		/*
+		 * read the eeprom header using i2c again, but use only a
+		 * 1 byte address (some legacy boards need this..)
+		 */
+		byte = 1;
+		if (rc)
+			rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read,
+				      4);
+		if (rc)
+			return rc;
+	}
+	if (hdr_read != header)
+		return -1;
+
+	rc = i2c_read(dev_addr, 0x0, byte, ep, size);
+	if (rc)
+		return rc;
+
+	return 0;
+}
+
+int __maybe_unused ti_i2c_eeprom_am_get(int bus_addr, int dev_addr)
+{
+	int rc;
+	struct ti_am_eeprom am_ep;
+	struct ti_common_eeprom *ep;
+
+	ep = TI_EEPROM_DATA;
+	if (ep->header == TI_EEPROM_HEADER_MAGIC)
+		goto already_read;
+
+	/* Initialize with a known bad marker for i2c fails.. */
+	ep->header = TI_DEAD_EEPROM_MAGIC;
+	ep->name[0] = 0x0;
+	ep->version[0] = 0x0;
+	ep->serial[0] = 0x0;
+
+	rc = ti_i2c_eeprom_get(bus_addr, dev_addr, TI_EEPROM_HEADER_MAGIC,
+			       sizeof(am_ep), (uint8_t *)&am_ep);
+	if (rc)
+		return rc;
+
+	ep->header = am_ep.header;
+	strlcpy(ep->name, am_ep.name, TI_EEPROM_HDR_NAME_LEN + 1);
+	ti_eeprom_string_cleanup(ep->name);
+
+	/* BeagleBone Green '1' eeprom, board_rev: 0x1a 0x00 0x00 0x00 */
+	if (am_ep.version[0] == 0x1a && am_ep.version[1] == 0x00 &&
+	    am_ep.version[2] == 0x00 && am_ep.version[3] == 0x00)
+		strlcpy(ep->version, "BBG1", TI_EEPROM_HDR_REV_LEN + 1);
+	else
+		strlcpy(ep->version, am_ep.version, TI_EEPROM_HDR_REV_LEN + 1);
+	ti_eeprom_string_cleanup(ep->version);
+	strlcpy(ep->serial, am_ep.serial, TI_EEPROM_HDR_SERIAL_LEN + 1);
+	ti_eeprom_string_cleanup(ep->serial);
+	strlcpy(ep->config, am_ep.config, TI_EEPROM_HDR_CONFIG_LEN + 1);
+	ti_eeprom_string_cleanup(ep->config);
+
+	memcpy(ep->mac_addr, am_ep.mac_addr,
+	       TI_EEPROM_HDR_NO_OF_MAC_ADDR * TI_EEPROM_HDR_ETH_ALEN);
+
+already_read:
+	return 0;
+}
+
+int __maybe_unused ti_i2c_eeprom_dra7_get(int bus_addr, int dev_addr)
+{
+	int rc, offset = 0;
+	struct dra7_eeprom dra7_ep;
+	struct ti_common_eeprom *ep;
+
+	ep = TI_EEPROM_DATA;
+	if (ep->header == DRA7_EEPROM_HEADER_MAGIC)
+		goto already_read;
+
+	/* Initialize with a known bad marker for i2c fails.. */
+	ep->header = 0xADEAD12C;
+	ep->name[0] = 0x0;
+	ep->version[0] = 0x0;
+	ep->serial[0] = 0x0;
+	ep->emif1_size = 0;
+	ep->emif2_size = 0;
+
+	rc = ti_i2c_eeprom_get(bus_addr, dev_addr, DRA7_EEPROM_HEADER_MAGIC,
+			       sizeof(dra7_ep), (uint8_t *)&dra7_ep);
+	if (rc)
+		return rc;
+
+	ep->header = dra7_ep.header;
+	strlcpy(ep->name, dra7_ep.name, TI_EEPROM_HDR_NAME_LEN + 1);
+	ti_eeprom_string_cleanup(ep->name);
+
+	offset = dra7_ep.version_major - 1;
+
+	/* Rev F is skipped */
+	if (offset >= 5)
+		offset = offset + 1;
+	snprintf(ep->version, TI_EEPROM_HDR_REV_LEN + 1, "%c.%d",
+		 'A' + offset, dra7_ep.version_minor);
+	ti_eeprom_string_cleanup(ep->version);
+	ep->emif1_size = (u64)dra7_ep.emif1_size;
+	ep->emif2_size = (u64)dra7_ep.emif2_size;
+	strlcpy(ep->config, dra7_ep.config, TI_EEPROM_HDR_CONFIG_LEN + 1);
+	ti_eeprom_string_cleanup(ep->config);
+
+already_read:
+	return 0;
+}
+
+bool __maybe_unused board_ti_is(char *name_tag)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header == TI_DEAD_EEPROM_MAGIC)
+		return false;
+	return !strncmp(ep->name, name_tag, TI_EEPROM_HDR_NAME_LEN);
+}
+
+bool __maybe_unused board_ti_rev_is(char *rev_tag, int cmp_len)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+	int l;
+
+	if (ep->header == TI_DEAD_EEPROM_MAGIC)
+		return false;
+
+	l = cmp_len > TI_EEPROM_HDR_REV_LEN ? TI_EEPROM_HDR_REV_LEN : cmp_len;
+	return !strncmp(ep->version, rev_tag, l);
+}
+
+char * __maybe_unused board_ti_get_rev(void)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header == TI_DEAD_EEPROM_MAGIC)
+		return NULL;
+
+	return ep->version;
+}
+
+char * __maybe_unused board_ti_get_config(void)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header == TI_DEAD_EEPROM_MAGIC)
+		return NULL;
+
+	return ep->config;
+}
+
+char * __maybe_unused board_ti_get_name(void)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header == TI_DEAD_EEPROM_MAGIC)
+		return NULL;
+
+	return ep->name;
+}
+
+void __maybe_unused
+board_ti_get_eth_mac_addr(int index,
+			  u8 mac_addr[TI_EEPROM_HDR_ETH_ALEN])
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header == TI_DEAD_EEPROM_MAGIC)
+		goto fail;
+
+	if (index < 0 || index >= TI_EEPROM_HDR_NO_OF_MAC_ADDR)
+		goto fail;
+
+	memcpy(mac_addr, ep->mac_addr[index], TI_EEPROM_HDR_ETH_ALEN);
+	return;
+
+fail:
+	memset(mac_addr, 0, TI_EEPROM_HDR_ETH_ALEN);
+}
+
+u64 __maybe_unused board_ti_get_emif1_size(void)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header != DRA7_EEPROM_HEADER_MAGIC)
+		return 0;
+
+	return ep->emif1_size;
+}
+
+u64 __maybe_unused board_ti_get_emif2_size(void)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header != DRA7_EEPROM_HEADER_MAGIC)
+		return 0;
+
+	return ep->emif2_size;
+}
+
+void __maybe_unused set_board_info_env(char *name)
+{
+	char *unknown = "unknown";
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (name)
+		setenv("board_name", name);
+	else if (ep->name)
+		setenv("board_name", ep->name);
+	else
+		setenv("board_name", unknown);
+
+	if (ep->version)
+		setenv("board_rev", ep->version);
+	else
+		setenv("board_rev", unknown);
+
+	if (ep->serial)
+		setenv("board_serial", ep->serial);
+	else
+		setenv("board_serial", unknown);
+}