diff options
author | Ian Ray <ian.ray@ge.com> | 2017-08-22 09:03:54 +0300 |
---|---|---|
committer | Stefano Babic <sbabic@denx.de> | 2017-09-20 16:34:59 +0300 |
commit | be2808c3b0671751827b39753e7abe7278d33c62 (patch) | |
tree | 7c817b82a1c59d322148d848d64c53317c929bb2 /board/ge/bx50v3 | |
parent | b1e8512e9dbe1771da9c3ad3ddfaf7681318fe0e (diff) | |
download | u-boot-be2808c3b0671751827b39753e7abe7278d33c62.tar.xz |
board: ge: bx50v3: set eth0 MAC address
Define i2c mux configuration. Add new vpd_reader which is used to read
vital product data. Read VPD from EEPROM and set eth0 MAC address.
Signed-off-by: Ian Ray <ian.ray@ge.com>
Signed-off-by: Jose Alarcon <jose.alarcon@ge.com>
Diffstat (limited to 'board/ge/bx50v3')
-rw-r--r-- | board/ge/bx50v3/Makefile | 2 | ||||
-rw-r--r-- | board/ge/bx50v3/bx50v3.c | 109 | ||||
-rw-r--r-- | board/ge/bx50v3/vpd_reader.c | 228 | ||||
-rw-r--r-- | board/ge/bx50v3/vpd_reader.h | 25 |
4 files changed, 363 insertions, 1 deletions
diff --git a/board/ge/bx50v3/Makefile b/board/ge/bx50v3/Makefile index bcd149f5b0..2fff27bc77 100644 --- a/board/ge/bx50v3/Makefile +++ b/board/ge/bx50v3/Makefile @@ -5,4 +5,4 @@ # SPDX-License-Identifier: GPL-2.0+ # -obj-y := bx50v3.o +obj-y := bx50v3.o vpd_reader.o diff --git a/board/ge/bx50v3/bx50v3.c b/board/ge/bx50v3/bx50v3.c index b25c634bb5..c7df4ce847 100644 --- a/board/ge/bx50v3/bx50v3.c +++ b/board/ge/bx50v3/bx50v3.c @@ -26,8 +26,19 @@ #include <asm/arch/sys_proto.h> #include <i2c.h> #include <pwm.h> +#include <stdlib.h> +#include "vpd_reader.h" DECLARE_GLOBAL_DATA_PTR; +#ifndef CONFIG_SYS_I2C_EEPROM_ADDR +# define CONFIG_SYS_I2C_EEPROM_ADDR 0x50 +# define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1 +#endif + +#ifndef CONFIG_SYS_I2C_EEPROM_BUS +#define CONFIG_SYS_I2C_EEPROM_BUS 2 +#endif + #define NC_PAD_CTRL (PAD_CTL_PUS_100K_UP | \ PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \ PAD_CTL_HYS) @@ -528,6 +539,102 @@ int overwrite_console(void) return 1; } +#define VPD_TYPE_INVALID 0x00 +#define VPD_BLOCK_NETWORK 0x20 +#define VPD_BLOCK_HWID 0x44 +#define VPD_PRODUCT_B850 1 +#define VPD_PRODUCT_B650 2 +#define VPD_PRODUCT_B450 3 + +struct vpd_cache { + uint8_t product_id; + uint8_t macbits; + unsigned char mac1[6]; +}; + +/* + * Extracts MAC and product information from the VPD. + */ +static int vpd_callback( + void *userdata, + uint8_t id, + uint8_t version, + uint8_t type, + size_t size, + uint8_t const *data) +{ + struct vpd_cache *vpd = (struct vpd_cache *)userdata; + + if ( id == VPD_BLOCK_HWID + && version == 1 + && type != VPD_TYPE_INVALID + && size >= 1) { + vpd->product_id = data[0]; + + } else if ( id == VPD_BLOCK_NETWORK + && version == 1 + && type != VPD_TYPE_INVALID + && size >= 6) { + vpd->macbits |= 1; + memcpy(vpd->mac1, data, 6); + } + + return 0; +} + +static void set_eth0_mac_address(unsigned char * mac) +{ + uint32_t *ENET_TCR = (uint32_t*)0x21880c4; + uint32_t *ENET_PALR = (uint32_t*)0x21880e4; + uint32_t *ENET_PAUR = (uint32_t*)0x21880e8; + + *ENET_TCR |= 0x100; /* ADDINS */ + *ENET_PALR |= (mac[0] << 24) | (mac[1] << 16) | (mac[2] << 8) | mac[3]; + *ENET_PAUR |= (mac[4] << 24) | (mac[5] << 16); +} + +static void process_vpd(struct vpd_cache *vpd) +{ + if ( vpd->product_id == VPD_PRODUCT_B850 + || vpd->product_id == VPD_PRODUCT_B650 + || vpd->product_id == VPD_PRODUCT_B450) { + if (vpd->macbits & 1) { + set_eth0_mac_address(vpd->mac1); + } + } +} + +static int read_vpd(uint eeprom_bus) +{ + struct vpd_cache vpd; + int res; + int size = 1024; + uint8_t *data; + unsigned int current_i2c_bus = i2c_get_bus_num(); + + res = i2c_set_bus_num(eeprom_bus); + if (res < 0) + return res; + + data = (uint8_t *)malloc(size); + if (!data) + return -ENOMEM; + + res = i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, + CONFIG_SYS_I2C_EEPROM_ADDR_LEN, data, size); + + if (res == 0) { + memset(&vpd, 0, sizeof(vpd)); + vpd_reader(size, data, &vpd, vpd_callback); + process_vpd(&vpd); + } + + free(data); + + i2c_set_bus_num(current_i2c_bus); + return res; +} + int board_eth_init(bd_t *bis) { setup_iomux_enet(); @@ -586,6 +693,8 @@ int board_init(void) setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info2); setup_i2c(3, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info3); + read_vpd(CONFIG_SYS_I2C_EEPROM_BUS); + return 0; } diff --git a/board/ge/bx50v3/vpd_reader.c b/board/ge/bx50v3/vpd_reader.c new file mode 100644 index 0000000000..98da893d2c --- /dev/null +++ b/board/ge/bx50v3/vpd_reader.c @@ -0,0 +1,228 @@ +/* + * Copyright 2016 General Electric Company + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include "vpd_reader.h" + +#include <linux/bch.h> +#include <stdlib.h> + + +/* BCH configuration */ + +const struct { + int header_ecc_capability_bits; + int data_ecc_capability_bits; + unsigned int prim_poly; + struct { + int min; + int max; + } galois_field_order; +} bch_configuration = { + .header_ecc_capability_bits = 4, + .data_ecc_capability_bits = 16, + .prim_poly = 0, + .galois_field_order = { + .min = 5, + .max = 15, + }, +}; + +static int calculate_galois_field_order(size_t source_length) +{ + int gfo = bch_configuration.galois_field_order.min; + + for (; gfo < bch_configuration.galois_field_order.max && + ((((1 << gfo) - 1) - ((int)source_length * 8)) < 0); + gfo++) { + } + + if (gfo == bch_configuration.galois_field_order.max) { + return -1; + } + + return gfo + 1; +} + +static int verify_bch(int ecc_bits, unsigned int prim_poly, + uint8_t * data, size_t data_length, + const uint8_t * ecc, size_t ecc_length) +{ + int gfo = calculate_galois_field_order(data_length); + if (gfo < 0) { + return -1; + } + + struct bch_control * bch = init_bch(gfo, ecc_bits, prim_poly); + if (!bch) { + return -1; + } + + if (bch->ecc_bytes != ecc_length) { + free_bch(bch); + return -1; + } + + unsigned * errloc = (unsigned *)calloc(data_length, sizeof(unsigned)); + int errors = decode_bch( + bch, data, data_length, ecc, NULL, NULL, errloc); + free_bch(bch); + if (errors < 0) { + free(errloc); + return -1; + } + + if (errors > 0) { + for (int n = 0; n < errors; n++) { + if (errloc[n] >= 8 * data_length) { + /* n-th error located in ecc (no need for data correction) */ + } else { + /* n-th error located in data */ + data[errloc[n] / 8] ^= 1 << (errloc[n] % 8); + } + } + } + + free(errloc); + return 0; +} + + +static const int ID = 0; +static const int LEN = 1; +static const int VER = 2; +static const int TYP = 3; +static const int BLOCK_SIZE = 4; + +static const uint8_t HEADER_BLOCK_ID = 0x00; +static const uint8_t HEADER_BLOCK_LEN = 18; +static const uint32_t HEADER_BLOCK_MAGIC = 0xca53ca53; +static const size_t HEADER_BLOCK_VERIFY_LEN = 14; +static const size_t HEADER_BLOCK_ECC_OFF = 14; +static const size_t HEADER_BLOCK_ECC_LEN = 4; + +static const uint8_t ECC_BLOCK_ID = 0xFF; + +int vpd_reader( + size_t size, + uint8_t * data, + void * userdata, + int (*fn)( + void * userdata, + uint8_t id, + uint8_t version, + uint8_t type, + size_t size, + uint8_t const * data)) +{ + if ( size < HEADER_BLOCK_LEN + || data == NULL + || fn == NULL) { + return -EINVAL; + } + + /* + * +--------------------+--------------------+--//--+--------------------+ + * | header block | data block | ... | ecc block | + * +--------------------+--------------------+--//--+--------------------+ + * : : : + * +------+-------+-----+ +------+-------------+ + * | id | magic | ecc | | ... | ecc | + * | len | off | | +------+-------------+ + * | ver | size | | : + * | type | | | : + * +------+-------+-----+ : + * : : : : + * <----- [1] ----> <----------- [2] -----------> + * + * Repair (if necessary) the contents of header block [1] by using a + * 4 byte ECC located at the end of the header block. A successful + * return value means that we can trust the header. + */ + int ret = verify_bch( + bch_configuration.header_ecc_capability_bits, + bch_configuration.prim_poly, + data, + HEADER_BLOCK_VERIFY_LEN, + &data[HEADER_BLOCK_ECC_OFF], + HEADER_BLOCK_ECC_LEN); + if (ret < 0) { + return ret; + } + + /* Validate header block { id, length, version, type }. */ + if ( data[ID] != HEADER_BLOCK_ID + || data[LEN] != HEADER_BLOCK_LEN + || data[VER] != 0 + || data[TYP] != 0 + || ntohl(*(uint32_t *)(&data[4])) != HEADER_BLOCK_MAGIC) { + return -EINVAL; + } + + uint32_t offset = ntohl(*(uint32_t *)(&data[8])); + uint16_t size_bits = ntohs(*(uint16_t *)(&data[12])); + + /* Check that ECC header fits. */ + if (offset + 3 >= size) { + return -EINVAL; + } + + /* Validate ECC block. */ + uint8_t * ecc = &data[offset]; + if ( ecc[ID] != ECC_BLOCK_ID + || ecc[LEN] < BLOCK_SIZE + || ecc[LEN] + offset > size + || ecc[LEN] - BLOCK_SIZE != size_bits / 8 + || ecc[VER] != 1 + || ecc[TYP] != 1) { + return -EINVAL; + } + + /* + * Use the header block to locate the ECC block and verify the data + * blocks [2] against the ecc block ECC. + */ + ret = verify_bch( + bch_configuration.data_ecc_capability_bits, + bch_configuration.prim_poly, + &data[data[LEN]], + offset - data[LEN], + &data[offset + BLOCK_SIZE], + ecc[LEN] - BLOCK_SIZE); + if (ret < 0) { + return ret; + } + + /* Stop after ECC. Ignore possible zero padding. */ + size = offset; + + for (;;) { + /* Move to next block. */ + size -= data[LEN]; + data += data[LEN]; + + if (size == 0) { + /* Finished iterating through blocks. */ + return 0; + } + + if ( size < BLOCK_SIZE + || data[LEN] < BLOCK_SIZE) { + /* Not enough data for a header, or short header. */ + return -EINVAL; + } + + ret = fn( + userdata, + data[ID], + data[VER], + data[TYP], + data[LEN] - BLOCK_SIZE, + &data[BLOCK_SIZE]); + if (ret) { + return ret; + } + } +} diff --git a/board/ge/bx50v3/vpd_reader.h b/board/ge/bx50v3/vpd_reader.h new file mode 100644 index 0000000000..efa172a915 --- /dev/null +++ b/board/ge/bx50v3/vpd_reader.h @@ -0,0 +1,25 @@ +/* + * Copyright 2016 General Electric Company + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include "common.h" + +/* + * Read VPD from given data, verify content, and call callback + * for each vital product data block. + * + * Returns Non-zero on error. Negative numbers encode errno. + */ +int vpd_reader( + size_t size, + uint8_t * data, + void * userdata, + int (*fn)( + void * userdata, + uint8_t id, + uint8_t version, + uint8_t type, + size_t size, + uint8_t const * data)); |