From: Thomas Cort Date: Thu, 22 Aug 2013 15:16:08 +0000 (-0400) Subject: eepromread: add board info for BeagleBone Capes X-Git-Tag: v3.3.0~825 X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.ch06.html?a=commitdiff_plain;h=54f7991f4cba2b48813fbfa567f9f7f20496ee89;p=minix.git eepromread: add board info for BeagleBone Capes Capes (i.e. expansion boards for the BeagleBone and BeagleBone Black) each have their own cat24c256 EEPROM with information about the cape such as the name of the cape, pins used, power requirements, etc. This patch adds support for displaying the cape data fields. It can be used in shell scripts to detect and identify attached capes. Change-Id: I4bfa7aae634a7bacfa5e25afcba773d9fbc2316c --- diff --git a/commands/eepromread/board_info.c b/commands/eepromread/board_info.c index 66d000baa..6521b4a64 100644 --- a/commands/eepromread/board_info.c +++ b/commands/eepromread/board_info.c @@ -14,11 +14,11 @@ /* * Attempt to read the board info from an eeprom on this board. - * Currently only supports the BeagleBone and BeagleBone Black. - * In the future, this could be expanded to support cape EEPROMs. */ static int board_info_beaglebone(int fd, i2c_addr_t address, int flags); +static int board_info_cape_a0(int fd, i2c_addr_t address, int flags); +static int board_info_cape_a1(int fd, i2c_addr_t address, int flags); /* Memory Layout of the BeagleBone and BeagleBone Black EEPROM */ typedef struct beaglebone_info @@ -31,6 +31,42 @@ typedef struct beaglebone_info char mac_addrs[3][6]; /* Not set on BeagleBone White */ } beaglebone_info_t; +/* Memory Layout of the Cape EEPROM (A0 Format) - Defined in BBW SRM Rev A5.3 */ +typedef struct cape_info_a0 +{ + uint8_t magic_number[4]; /* Should be 0xaa 0x55 0x33 0xee */ + char revision[2]; /* Should be 'A' '0' */ + char board_name[32]; /* Warning: strings not NULL terminated */ + char version[4]; + char manufacturer[16]; + char partno[16]; + char num_pins[2]; + char serial[12]; + char pin_usage[140]; + char vdd_3v3exp_i[2]; + char vdd_5v_i[2]; + char sys_5v_i[2]; + char dc_supp[2]; +} cape_info_a0_t; + +/* Memory Layout of the Cape EEPROM (A1 Format) - Defined in BBB SRM Rev A5.3 */ +typedef struct cape_info_a1 +{ + uint8_t magic_number[4]; /* Should be 0xaa 0x55 0x33 0xee */ + char revision[2]; /* Should be 'A' '1' */ + char board_name[32]; /* Warning: strings not NULL terminated */ + char version[4]; + char manufacturer[16]; + char partno[16]; + char num_pins[2]; + char serial[12]; + char pin_usage[148]; + char vdd_3v3exp_i[2]; + char vdd_5v_i[2]; + char sys_5v_i[2]; + char dc_supp[2]; +} cape_info_a1_t; + static int board_info_beaglebone(int fd, i2c_addr_t address, int flags) { @@ -58,27 +94,129 @@ board_info_beaglebone(int fd, i2c_addr_t address, int flags) memcpy(s, boneinfo.version, 4); fprintf(stdout, "%-16s: %s\n", "VERSION", s); + memset(s, '\0', 33); memcpy(s, boneinfo.serial_number, 12); fprintf(stdout, "%-16s: %s\n", "SERIAL_NUMBER", s); return 0; } +static int +board_info_cape_a0(int fd, i2c_addr_t address, int flags) +{ + int r; + int i, j; + char s[33]; + cape_info_a0_t capeinfo; + + r = eeprom_read(fd, address, 0x0000, &capeinfo, + sizeof(cape_info_a0_t), flags); + if (r == -1) { + fprintf(stderr, "failed to read cape A0 info r=%d\n", r); + return -1; + } + + fprintf(stdout, "%-16s: 0x%x%x%x%x\n", "MAGIC_NUMBER", + capeinfo.magic_number[0], capeinfo.magic_number[1], + capeinfo.magic_number[2], capeinfo.magic_number[3]); + + memset(s, '\0', 33); + memcpy(s, capeinfo.revision, 2); + fprintf(stdout, "%-16s: %s\n", "REVISION", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.board_name, 32); + fprintf(stdout, "%-16s: %s\n", "BOARD_NAME", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.version, 4); + fprintf(stdout, "%-16s: %s\n", "VERSION", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.manufacturer, 16); + fprintf(stdout, "%-16s: %s\n", "MANUFACTURER", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.partno, 16); + fprintf(stdout, "%-16s: %s\n", "PART_NUMBER", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.serial, 12); + fprintf(stdout, "%-16s: %s\n", "SERIAL", s); + + return 0; +} + +static int +board_info_cape_a1(int fd, i2c_addr_t address, int flags) +{ + int r; + int i, j; + char s[33]; + cape_info_a1_t capeinfo; + + r = eeprom_read(fd, address, 0x0000, &capeinfo, + sizeof(cape_info_a1_t), flags); + if (r == -1) { + fprintf(stderr, "failed to read cape A0 info r=%d\n", r); + return -1; + } + + fprintf(stdout, "%-16s: 0x%x%x%x%x\n", "MAGIC_NUMBER", + capeinfo.magic_number[0], capeinfo.magic_number[1], + capeinfo.magic_number[2], capeinfo.magic_number[3]); + + memset(s, '\0', 33); + memcpy(s, capeinfo.revision, 2); + fprintf(stdout, "%-16s: %s\n", "REVISION", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.board_name, 32); + fprintf(stdout, "%-16s: %s\n", "BOARD_NAME", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.version, 4); + fprintf(stdout, "%-16s: %s\n", "VERSION", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.manufacturer, 16); + fprintf(stdout, "%-16s: %s\n", "MANUFACTURER", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.partno, 16); + fprintf(stdout, "%-16s: %s\n", "PART_NUMBER", s); + + memset(s, '\0', 33); + memcpy(s, capeinfo.serial, 12); + fprintf(stdout, "%-16s: %s\n", "SERIAL", s); + + return 0; +} + int board_info(int fd, i2c_addr_t address, int flags) { int r; - uint8_t magic_number[4]; + uint8_t magic_number[6]; - r = eeprom_read(fd, address, 0x0000, &magic_number, 4, flags); + r = eeprom_read(fd, address, 0x0000, &magic_number, 6, flags); if (r == -1) { printf("%-16s: %s\n", "BOARD_NAME", "UNKNOWN"); return 0; } + /* Check for BeagleBone/BeagleBone Black/Cape Magic Number */ if (magic_number[0] == 0xaa && magic_number[1] == 0x55 && magic_number[2] == 0x33 && magic_number[3] == 0xee) { - board_info_beaglebone(fd, address, flags); + + /* Check if Cape Rev A0, Cape Rev A1, or on-board EEPROM */ + if (magic_number[4] == 'A' && magic_number[5] == '0') { + board_info_cape_a0(fd, address, flags); + } else if (magic_number[4] == 'A' && magic_number[5] == '1') { + board_info_cape_a1(fd, address, flags); + } else { + board_info_beaglebone(fd, address, flags); + } } else { printf("%-16s: %s\n", "BOARD_NAME", "UNKNOWN"); }