#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)
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();
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;
}
--- /dev/null
+/*
+ * 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;
+ }
+ }
+}
#define CONFIG_SYS_I2C_MXC_I2C2
#define CONFIG_SYS_I2C_MXC_I2C3
+#define CONFIG_SYS_NUM_I2C_BUSES 9
+#define CONFIG_SYS_I2C_MAX_HOPS 1
+#define CONFIG_SYS_I2C_BUSES { {0, {I2C_NULL_HOP} }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 0} } }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 1} } }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 2} } }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 3} } }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 4} } }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 5} } }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 6} } }, \
+ {0, {{I2C_MUX_PCA9547, 0x70, 7} } }, \
+ }
+
+#define CONFIG_BCH
+
#endif /* __GE_BX50V3_CONFIG_H */
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