| /* |
| * 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; |
| ep->config[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 = TI_DEAD_EEPROM_MAGIC; |
| ep->name[0] = 0x0; |
| ep->version[0] = 0x0; |
| ep->serial[0] = 0x0; |
| ep->config[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, this is empty already */ |
| 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, this is empty already */ |
| 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, this is empty already */ |
| 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); |
| } |