diff options
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/.gitignore | 1 | ||||
| -rw-r--r-- | examples/Makefile | 7 | ||||
| -rw-r--r-- | examples/smc911x_eeprom.c | 381 |
3 files changed, 386 insertions, 3 deletions
diff --git a/examples/.gitignore b/examples/.gitignore index 806425f..0d1864c 100644 --- a/examples/.gitignore +++ b/examples/.gitignore @@ -6,5 +6,6 @@ /timer /sched /smc91111_eeprom +/smc911x_eeprom *.bin *.srec diff --git a/examples/Makefile b/examples/Makefile index 927010d..dbcfa92 100644 --- a/examples/Makefile +++ b/examples/Makefile @@ -105,9 +105,10 @@ BIN += sched.bin endif ifeq ($(ARCH),blackfin) -ELF += smc91111_eeprom -SREC += smc91111_eeprom.srec -BIN += smc91111_eeprom.bin +BFIN_BIN = smc91111_eeprom smc911x_eeprom +ELF += $(BFIN_BIN) +SREC += $(addsuffix .srec,$(BFIN_BIN)) +BIN += $(addsuffix .bin,$(BFIN_BIN)) endif # The following example is pretty 8xx specific... diff --git a/examples/smc911x_eeprom.c b/examples/smc911x_eeprom.c new file mode 100644 index 0000000..3dac4d3 --- /dev/null +++ b/examples/smc911x_eeprom.c @@ -0,0 +1,381 @@ +/* + * smc911x_eeprom.c - EEPROM interface to SMC911x parts. + * Only tested on SMSC9118 though ... + * + * Copyright 2004-2008 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + * + * Based on smc91111_eeprom.c which: + * Heavily borrowed from the following peoples GPL'ed software: + * - Wolfgang Denk, DENX Software Engineering, wd@denx.de + * Das U-boot + * - Ladislav Michl ladis@linux-mips.org + * A rejected patch on the U-Boot mailing list + */ + +#include <common.h> +#include <exports.h> + +#ifdef CONFIG_DRIVER_SMC911X + +#include "../drivers/net/smc911x.h" + +/** + * smsc_ctrlc - detect press of CTRL+C (common ctrlc() isnt exported!?) + */ +static int smsc_ctrlc(void) +{ + return (tstc() && getc() == 0x03); +} + +/** + * usage - dump usage information + */ +static void usage(void) +{ + puts( + "MAC/EEPROM Commands:\n" + " P : Print the MAC addresses\n" + " D : Dump the EEPROM contents\n" + " M : Dump the MAC contents\n" + " C : Copy the MAC address from the EEPROM to the MAC\n" + " W : Write a register in the EEPROM or in the MAC\n" + " Q : Quit\n" + "\n" + "Some commands take arguments:\n" + " W <E|M> <register> <value>\n" + " E: EEPROM M: MAC\n" + ); +} + +/** + * dump_regs - dump the MAC registers + * + * Registers 0x00 - 0x50 are FIFOs. The 0x50+ are the control registers + * and they're all 32bits long. 0xB8+ are reserved, so don't bother. + */ +static void dump_regs(void) +{ + u8 i, j = 0; + for (i = 0x50; i < 0xB8; i += sizeof(u32)) + printf("%02x: 0x%08x %c", i, reg_read(CONFIG_DRIVER_SMC911X_BASE + i), + (j++ % 2 ? '\n' : ' ')); +} + +/** + * do_eeprom_cmd - handle eeprom communication + */ +static int do_eeprom_cmd(int cmd, u8 reg) +{ + if (reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY) { + printf("eeprom_cmd: busy at start (E2P_CMD = 0x%08x)\n", + reg_read(E2P_CMD)); + return -1; + } + + reg_write(E2P_CMD, E2P_CMD_EPC_BUSY | cmd | reg); + + while (reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY) + if (smsc_ctrlc()) { + printf("eeprom_cmd: timeout (E2P_CMD = 0x%08x)\n", + reg_read(E2P_CMD)); + return -1; + } + + return 0; +} + +/** + * read_eeprom_reg - read specified register in EEPROM + */ +static u8 read_eeprom_reg(u8 reg) +{ + int ret = do_eeprom_cmd(E2P_CMD_EPC_CMD_READ, reg); + return (ret ? : reg_read(E2P_DATA)); +} + +/** + * write_eeprom_reg - write specified value into specified register in EEPROM + */ +static int write_eeprom_reg(u8 value, u8 reg) +{ + int ret; + + /* enable erasing/writing */ + ret = do_eeprom_cmd(E2P_CMD_EPC_CMD_EWEN, reg); + if (ret) + goto done; + + /* erase the eeprom reg */ + ret = do_eeprom_cmd(E2P_CMD_EPC_CMD_ERASE, reg); + if (ret) + goto done; + + /* write the eeprom reg */ + reg_write(E2P_DATA, value); + ret = do_eeprom_cmd(E2P_CMD_EPC_CMD_WRITE, reg); + if (ret) + goto done; + + /* disable erasing/writing */ + ret = do_eeprom_cmd(E2P_CMD_EPC_CMD_EWDS, reg); + + done: + return ret; +} + +/** + * skip_space - find first non-whitespace in given pointer + */ +static char *skip_space(char *buf) +{ + while (buf[0] == ' ' || buf[0] == '\t') + ++buf; + return buf; +} + +/** + * write_stuff - handle writing of MAC registers / eeprom + */ +static void write_stuff(char *line) +{ + char dest; + char *endp; + u8 reg; + u32 value; + + /* Skip over the "W " part of the command */ + line = skip_space(line + 1); + + /* Figure out destination */ + switch (line[0]) { + case 'E': + case 'M': + dest = line[0]; + break; + default: + invalid_usage: + printf("ERROR: Invalid write usage\n"); + usage(); + return; + } + + /* Get the register to write */ + line = skip_space(line + 1); + reg = simple_strtoul(line, &endp, 16); + if (line == endp) + goto invalid_usage; + + /* Get the value to write */ + line = skip_space(endp); + value = simple_strtoul(line, &endp, 16); + if (line == endp) + goto invalid_usage; + + /* Check for trailing cruft */ + line = skip_space(endp); + if (line[0]) + goto invalid_usage; + + /* Finally, execute the command */ + if (dest == 'E') { + printf("Writing EEPROM register %02x with %02x\n", reg, value); + write_eeprom_reg(value, reg); + } else { + printf("Writing MAC register %02x with %08x\n", reg, value); + reg_write(CONFIG_DRIVER_SMC911X_BASE + reg, value); + } +} + +/** + * copy_from_eeprom - copy MAC address in eeprom to address registers + */ +static void copy_from_eeprom(void) +{ + ulong addrl = + read_eeprom_reg(0x01) | + read_eeprom_reg(0x02) << 8 | + read_eeprom_reg(0x03) << 16 | + read_eeprom_reg(0x04) << 24; + ulong addrh = + read_eeprom_reg(0x05) | + read_eeprom_reg(0x06) << 8; + smc911x_set_mac_csr(ADDRL, addrl); + smc911x_set_mac_csr(ADDRH, addrh); + puts("EEPROM contents copied to MAC\n"); +} + +/** + * print_macaddr - print MAC address registers and MAC address in eeprom + */ +static void print_macaddr(void) +{ + puts("Current MAC Address in MAC: "); + ulong addrl = smc911x_get_mac_csr(ADDRL); + ulong addrh = smc911x_get_mac_csr(ADDRH); + printf("%02x:%02x:%02x:%02x:%02x:%02x\n", + (u8)(addrl), (u8)(addrl >> 8), (u8)(addrl >> 16), + (u8)(addrl >> 24), (u8)(addrh), (u8)(addrh >> 8)); + + puts("Current MAC Address in EEPROM: "); + int i; + for (i = 1; i < 6; ++i) + printf("%02x:", read_eeprom_reg(i)); + printf("%02x\n", read_eeprom_reg(i)); +} + +/** + * dump_eeprom - dump the whole content of the EEPROM + */ +static void dump_eeprom(void) +{ + int i; + puts("EEPROM:\n"); + for (i = 0; i < 7; ++i) + printf("%02x: 0x%02x\n", i, read_eeprom_reg(i)); +} + +/** + * smc911x_init - get the MAC/EEPROM up and ready for use + */ +static int smc911x_init(void) +{ + /* See if there is anything there */ + if (!smc911x_detect_chip()) + return 1; + + smc911x_reset(); + + /* Make sure we set EEDIO/EECLK to the EEPROM */ + if (reg_read(GPIO_CFG) & GPIO_CFG_EEPR_EN) { + while (reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY) + if (smsc_ctrlc()) { + printf("init: timeout (E2P_CMD = 0x%08x)\n", reg_read(E2P_CMD)); + return 1; + } + reg_write(GPIO_CFG, reg_read(GPIO_CFG) & ~GPIO_CFG_EEPR_EN); + } + + return 0; +} + +/** + * getline - consume a line of input and handle some escape sequences + */ +static char *getline(void) +{ + static char buffer[100]; + char c; + size_t i; + + i = 0; + while (1) { + buffer[i] = '\0'; + while (!tstc()) + continue; + + c = getc(); + /* Convert to uppercase */ + if (c >= 'a' && c <= 'z') + c -= ('a' - 'A'); + + switch (c) { + case '\r': /* Enter/Return key */ + case '\n': + puts("\n"); + return buffer; + + case 0x03: /* ^C - break */ + return NULL; + + case 0x5F: + case 0x08: /* ^H - backspace */ + case 0x7F: /* DEL - backspace */ + if (i) { + puts("\b \b"); + i--; + } + break; + + default: + /* Ignore control characters */ + if (c < 0x20) + break; + /* Queue up all other characters */ + buffer[i++] = c; + printf("%c", c); + break; + } + } +} + +/** + * smc911x_eeprom - our application's main() function + */ +int smc911x_eeprom(int argc, char *argv[]) +{ + /* Print the ABI version */ + app_startup(argv); + if (XF_VERSION != get_version()) { + printf("Expects ABI version %d\n", XF_VERSION); + printf("Actual U-Boot ABI version %lu\n", get_version()); + printf("Can't run\n\n"); + return 1; + } + + /* Initialize the MAC/EEPROM somewhat */ + puts("\n"); + if (smc911x_init()) + return 1; + + /* Dump helpful usage information */ + puts("\n"); + usage(); + puts("\n"); + + while (1) { + char *line; + + /* Send the prompt and wait for a line */ + puts("eeprom> "); + line = getline(); + + /* Got a ctrl+c */ + if (!line) + return 0; + + /* Eat leading space */ + line = skip_space(line); + + /* Empty line, try again */ + if (!line[0]) + continue; + + /* Only accept 1 letter commands */ + if (line[0] && line[1] && line[1] != ' ' && line[1] != '\t') + goto unknown_cmd; + + /* Now parse the command */ + switch (line[0]) { + case 'W': write_stuff(line); break; + case 'D': dump_eeprom(); break; + case 'M': dump_regs(); break; + case 'C': copy_from_eeprom(); break; + case 'P': print_macaddr(); break; + unknown_cmd: + default: puts("ERROR: Unknown command!\n\n"); + case '?': + case 'H': usage(); break; + case 'Q': return 0; + } + } +} + +#else +int smc911x_eeprom(int argc, char *argv[]) +{ + puts("Not supported for this board\n"); + return 1; +} +#endif |