diff options
Diffstat (limited to 'board/micronas/vct/smc_eeprom.c')
| -rw-r--r-- | board/micronas/vct/smc_eeprom.c | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/board/micronas/vct/smc_eeprom.c b/board/micronas/vct/smc_eeprom.c new file mode 100644 index 0000000000..2bc7ad4c4b --- /dev/null +++ b/board/micronas/vct/smc_eeprom.c @@ -0,0 +1,394 @@ +/* + * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering + * + * Copyright 2005, Seagate Technology LLC + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + */ + +#undef DEBUG + +#include <common.h> +#include <command.h> +#include <config.h> +#include <net.h> + +#include "vct.h" + +#define SMSC9118_BASE CONFIG_DRIVER_SMC911X_BASE +#define BYTE_TEST (SMSC9118_BASE + 0x64) +#define GPIO_CFG (SMSC9118_BASE + 0x88) +#define MAC_CSR_CMD (SMSC9118_BASE + 0xA4) +#define MAC_CSR_CMD_CSR_BUSY (0x80000000) +#define MAC_CSR_CMD_RNW (0x40000000) +#define MAC_RD_CMD(reg) ((reg & 0x000000FF) | \ + (MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_RNW)) +#define MAC_WR_CMD(reg) ((reg & 0x000000FF) | \ + (MAC_CSR_CMD_CSR_BUSY)) +#define MAC_CSR_DATA (SMSC9118_BASE + 0xA8) +#define E2P_CMD (SMSC9118_BASE + 0xB0) +#define E2P_CMD_EPC_BUSY_ (0x80000000UL) /* Self Clearing */ +#define E2P_CMD_EPC_CMD_ (0x70000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_READ_ (0x00000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_EWDS_ (0x10000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_EWEN_ (0x20000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_WRITE_ (0x30000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_WRAL_ (0x40000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_ERASE_ (0x50000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_ERAL_ (0x60000000UL) /* R/W */ +#define E2P_CMD_EPC_CMD_RELOAD_ (0x70000000UL) /* R/W */ +#define E2P_CMD_EPC_TIMEOUT_ (0x00000200UL) /* R */ +#define E2P_CMD_MAC_ADDR_LOADED_ (0x00000100UL) /* RO */ +#define E2P_CMD_EPC_ADDR_ (0x000000FFUL) /* R/W */ +#define E2P_DATA (SMSC9118_BASE + 0xB4) + +#define MAC_ADDRH (0x2) +#define MAC_ADDRL (0x3) + +#define MAC_TIMEOUT 200 + +#define HIBYTE(word) ((u8)(((u16)(word)) >> 8)) +#define LOBYTE(word) ((u8)(((u16)(word)) & 0x00FFU)) +#define HIWORD(dword) ((u16)(((u32)(dword)) >> 16)) +#define LOWORD(dword) ((u16)(((u32)(dword)) & 0x0000FFFFUL)) + +static int mac_busy(int req_to) +{ + int timeout = req_to; + + while (timeout--) { + if (!(smc911x_reg_read(MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)) + goto done; + } + return 1; /* Timeout */ + +done: + return 0; /* No timeout */ +} + +static ulong get_mac_reg(int reg) +{ + ulong reg_val = 0xffffffff; + + if (smc911x_reg_read(MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY) { + printf("get_mac_reg: previous command not complete\n"); + goto done; + } + + smc911x_reg_write(MAC_CSR_CMD, MAC_RD_CMD(reg)); + udelay(10000); + + if (mac_busy(MAC_TIMEOUT) == 1) { + printf("get_mac_reg: timeout waiting for response from MAC\n"); + goto done; + } + + reg_val = smc911x_reg_read(MAC_CSR_DATA); + +done: + return (reg_val); +} + +static ulong eeprom_enable_access(void) +{ + ulong gpio; + + gpio = smc911x_reg_read(GPIO_CFG); + debug("%s: gpio= 0x%08lx ---> 0x%08lx\n", __func__, gpio, + (gpio & 0xFF0FFFFFUL)); + + smc911x_reg_write(GPIO_CFG, (gpio & 0xFF0FFFFFUL)); + return gpio; +} + +static void eeprom_disable_access(ulong gpio) +{ + debug("%s: gpio= 0x%08lx\n", __func__, gpio); + smc911x_reg_write(GPIO_CFG, gpio); +} + +static int eeprom_is_mac_address_loaded(void) +{ + int ret; + + ret = smc911x_reg_read(MAC_CSR_CMD) & E2P_CMD_MAC_ADDR_LOADED_; + debug("%s: ret = %x\n", __func__, ret); + + return ret; +} + +static int eeprom_read_location(unchar address, u8 *data) +{ + ulong timeout = 100000; + ulong temp = 0; + + if ((temp = smc911x_reg_read(E2P_CMD)) & E2P_CMD_EPC_BUSY_) { + printf("%s: Busy at start, E2P_CMD=0x%08lX\n", __func__, temp); + return 0; + } + + smc911x_reg_write(E2P_CMD, + (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_READ_ | + ((ulong) address))); + + while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) { + udelay(10); + timeout--; + } + + if (timeout == 0) { + printf("Timeout\n"); + return 0; + } + (*data) = (unchar) (smc911x_reg_read(E2P_DATA)); + debug("%s: ret = %x\n", __func__, (*data)); + + return 1; +} + +static int eeprom_enable_erase_and_write(void) +{ + ulong timeout = 100000; + + if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) { + printf("%s: Busy at start\n", __func__); + return 0; + } + smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWEN_)); + + while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) { + udelay(10); + timeout--; + } + + if (timeout == 0) { + printf("Timeout[1]\n"); + return 0; + } + + return 1; +} + +static int eeprom_disable_erase_and_write(void) +{ + ulong timeout = 100000; + + if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) { + printf("%s: Busy at start\n", __func__); + return 0; + } + smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWDS_)); + + while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) { + udelay(10); + timeout--; + } + + if (timeout == 0) { + printf("Timeout[2]\n"); + return 0; + } + + return 1; +} + +static int eeprom_write_location(unchar address, unchar data) +{ + ulong timeout = 100000; + + debug("%s: address: %x data = %x\n", __func__, address, data); + + if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) { + printf("%s: Busy at start\n", __func__); + return 0; + } + + smc911x_reg_write(E2P_DATA, ((ulong) data)); + smc911x_reg_write(E2P_CMD, + (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_WRITE_ | + ((ulong) address))); + + while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) { + udelay(10); + timeout--; + } + + if (timeout == 0) { + printf("Timeout[3]\n"); + return 0; + } + + return 1; +} + +static int eeprom_erase_all(void) +{ + ulong timeout = 100000; + + if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) { + printf("%s: Busy at start\n", __func__); + return 0; + } + + smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_ERAL_)); + + while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) { + udelay(10); + timeout--; + } + + if (timeout == 0) { + printf("Timeout[4]\n"); + return 0; + } + + return 1; +} + +static int eeprom_reload(void) +{ + ulong timeout = 100000; + + if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) { + printf("%s: Busy at start\n", __func__); + return -1; + } + smc911x_reg_write(E2P_CMD, + (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_RELOAD_)); + + while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) { + udelay(10); + timeout--; + } + + if (timeout == 0) + return 0; + + return 1; +} + +static int eeprom_save_mac_address(ulong dwHi16, ulong dwLo32) +{ + int result = 0; + + debug("%s: dwHI: 0x%08lx dwLO: %08lx, \n", __func__, dwHi16, dwLo32); + + if (!eeprom_enable_erase_and_write()) + goto DONE; + if (!eeprom_erase_all()) + goto DONE; + if (!eeprom_write_location(0, 0xA5)) + goto DONE; + if (!eeprom_write_location(1, LOBYTE(LOWORD(dwLo32)))) + goto DONE; + if (!eeprom_write_location(2, HIBYTE(LOWORD(dwLo32)))) + goto DONE; + if (!eeprom_write_location(3, LOBYTE(HIWORD(dwLo32)))) + goto DONE; + if (!eeprom_write_location(4, HIBYTE(HIWORD(dwLo32)))) + goto DONE; + if (!eeprom_write_location(5, LOBYTE(LOWORD(dwHi16)))) + goto DONE; + if (!eeprom_write_location(6, HIBYTE(LOWORD(dwHi16)))) + goto DONE; + if (!eeprom_disable_erase_and_write()) + goto DONE; + + result = 1; + +DONE: + return result; +} + +static int do_eeprom_dump(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + unchar data = 0, index = 0; + ulong gpio_old_val; + + gpio_old_val = eeprom_enable_access(); + + printf("EEPROM content: \n"); + for (index = 0; index < 8; index++) { + if (eeprom_read_location(index, &data)) + printf("%02x ", data); + else + printf("FAILED"); + } + + eeprom_disable_access(gpio_old_val); + printf("\n"); + + return 0; +} + +static int do_eeprom_erase_all(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + eeprom_erase_all(); + + return 0; +} + +static int do_eeprom_save_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + ulong hi16, lo32; + unchar ethaddr[6], i; + ulong gpio; + char *tmp, *end; + + tmp = argv[1]; + for (i = 0; i < 6; i++) { + ethaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0; + if (tmp) + tmp = (*end) ? end + 1 : end; + } + + hi16 = (ethaddr[5] << 8) | (ethaddr[4]); + lo32 = (ethaddr[3] << 24) | (ethaddr[2] << 16) | + (ethaddr[1] << 8) | (ethaddr[0]); + + gpio = eeprom_enable_access(); + + eeprom_save_mac_address(hi16, lo32); + + eeprom_reload(); + + /* Check new values */ + if (eeprom_is_mac_address_loaded()) { + ulong mac_hi16, mac_lo32; + + mac_hi16 = get_mac_reg(MAC_ADDRH); + mac_lo32 = get_mac_reg(MAC_ADDRL); + printf("New MAC address: %lx, %lx\n", mac_hi16, mac_lo32); + } else { + printf("Address is not reloaded \n"); + } + eeprom_disable_access(gpio); + + return 0; +} + +U_BOOT_CMD(smcee, 1, 0, do_eeprom_erase_all, + "smcee - Erase content of SMC EEPROM\n",); + +U_BOOT_CMD(smced, 1, 0, do_eeprom_dump, + "smced - Dump content of SMC EEPROM\n",); + +U_BOOT_CMD(smcew, 2, 0, do_eeprom_save_mac, + "smcew - Write MAC address to SMC EEPROM\n", + "aa:bb:cc:dd:ee:ff new mac address\n"); |
