377 lines
8.2 KiB
C
377 lines
8.2 KiB
C
/*
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* smc911x_eeprom.c - EEPROM interface to SMC911x parts.
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* Only tested on SMSC9118 though ...
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*
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* Copyright 2004-2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*
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* Based on smc91111_eeprom.c which:
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* Heavily borrowed from the following peoples GPL'ed software:
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* - Wolfgang Denk, DENX Software Engineering, wd@denx.de
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* Das U-boot
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* - Ladislav Michl ladis@linux-mips.org
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* A rejected patch on the U-Boot mailing list
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*/
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#include <common.h>
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#include <exports.h>
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#include "../drivers/net/smc911x.h"
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/**
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* smsc_ctrlc - detect press of CTRL+C (common ctrlc() isnt exported!?)
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*/
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static int smsc_ctrlc(void)
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{
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return (tstc() && getc() == 0x03);
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}
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/**
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* usage - dump usage information
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*/
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static void usage(void)
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{
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puts(
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"MAC/EEPROM Commands:\n"
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" P : Print the MAC addresses\n"
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" D : Dump the EEPROM contents\n"
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" M : Dump the MAC contents\n"
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" C : Copy the MAC address from the EEPROM to the MAC\n"
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" W : Write a register in the EEPROM or in the MAC\n"
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" Q : Quit\n"
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"\n"
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"Some commands take arguments:\n"
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" W <E|M> <register> <value>\n"
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" E: EEPROM M: MAC\n"
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);
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}
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/**
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* dump_regs - dump the MAC registers
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*
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* Registers 0x00 - 0x50 are FIFOs. The 0x50+ are the control registers
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* and they're all 32bits long. 0xB8+ are reserved, so don't bother.
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*/
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static void dump_regs(struct eth_device *dev)
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{
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u8 i, j = 0;
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for (i = 0x50; i < 0xB8; i += sizeof(u32))
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printf("%02x: 0x%08x %c", i,
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smc911x_reg_read(dev, i),
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(j++ % 2 ? '\n' : ' '));
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}
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/**
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* do_eeprom_cmd - handle eeprom communication
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*/
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static int do_eeprom_cmd(struct eth_device *dev, int cmd, u8 reg)
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{
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if (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY) {
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printf("eeprom_cmd: busy at start (E2P_CMD = 0x%08x)\n",
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smc911x_reg_read(dev, E2P_CMD));
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return -1;
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}
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smc911x_reg_write(dev, E2P_CMD, E2P_CMD_EPC_BUSY | cmd | reg);
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while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
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if (smsc_ctrlc()) {
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printf("eeprom_cmd: timeout (E2P_CMD = 0x%08x)\n",
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smc911x_reg_read(dev, E2P_CMD));
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return -1;
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}
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return 0;
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}
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/**
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* read_eeprom_reg - read specified register in EEPROM
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*/
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static u8 read_eeprom_reg(struct eth_device *dev, u8 reg)
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{
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int ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ, reg);
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return (ret ? : smc911x_reg_read(dev, E2P_DATA));
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}
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/**
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* write_eeprom_reg - write specified value into specified register in EEPROM
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*/
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static int write_eeprom_reg(struct eth_device *dev, u8 value, u8 reg)
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{
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int ret;
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/* enable erasing/writing */
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ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN, reg);
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if (ret)
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goto done;
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/* erase the eeprom reg */
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ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE, reg);
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if (ret)
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goto done;
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/* write the eeprom reg */
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smc911x_reg_write(dev, E2P_DATA, value);
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ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE, reg);
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if (ret)
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goto done;
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/* disable erasing/writing */
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ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWDS, reg);
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done:
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return ret;
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}
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/**
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* skip_space - find first non-whitespace in given pointer
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*/
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static char *skip_space(char *buf)
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{
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while (buf[0] == ' ' || buf[0] == '\t')
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++buf;
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return buf;
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}
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/**
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* write_stuff - handle writing of MAC registers / eeprom
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*/
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static void write_stuff(struct eth_device *dev, char *line)
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{
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char dest;
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char *endp;
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u8 reg;
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u32 value;
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/* Skip over the "W " part of the command */
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line = skip_space(line + 1);
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/* Figure out destination */
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switch (line[0]) {
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case 'E':
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case 'M':
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dest = line[0];
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break;
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default:
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invalid_usage:
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printf("ERROR: Invalid write usage\n");
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usage();
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return;
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}
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/* Get the register to write */
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line = skip_space(line + 1);
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reg = simple_strtoul(line, &endp, 16);
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if (line == endp)
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goto invalid_usage;
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/* Get the value to write */
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line = skip_space(endp);
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value = simple_strtoul(line, &endp, 16);
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if (line == endp)
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goto invalid_usage;
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/* Check for trailing cruft */
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line = skip_space(endp);
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if (line[0])
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goto invalid_usage;
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/* Finally, execute the command */
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if (dest == 'E') {
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printf("Writing EEPROM register %02x with %02x\n", reg, value);
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write_eeprom_reg(dev, value, reg);
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} else {
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printf("Writing MAC register %02x with %08x\n", reg, value);
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smc911x_reg_write(dev, reg, value);
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}
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}
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/**
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* copy_from_eeprom - copy MAC address in eeprom to address registers
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*/
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static void copy_from_eeprom(struct eth_device *dev)
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{
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ulong addrl =
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read_eeprom_reg(dev, 0x01) |
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read_eeprom_reg(dev, 0x02) << 8 |
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read_eeprom_reg(dev, 0x03) << 16 |
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read_eeprom_reg(dev, 0x04) << 24;
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ulong addrh =
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read_eeprom_reg(dev, 0x05) |
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read_eeprom_reg(dev, 0x06) << 8;
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smc911x_set_mac_csr(dev, ADDRL, addrl);
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smc911x_set_mac_csr(dev, ADDRH, addrh);
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puts("EEPROM contents copied to MAC\n");
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}
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/**
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* print_macaddr - print MAC address registers and MAC address in eeprom
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*/
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static void print_macaddr(struct eth_device *dev)
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{
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puts("Current MAC Address in MAC: ");
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ulong addrl = smc911x_get_mac_csr(dev, ADDRL);
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ulong addrh = smc911x_get_mac_csr(dev, ADDRH);
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printf("%02x:%02x:%02x:%02x:%02x:%02x\n",
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(u8)(addrl), (u8)(addrl >> 8), (u8)(addrl >> 16),
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(u8)(addrl >> 24), (u8)(addrh), (u8)(addrh >> 8));
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puts("Current MAC Address in EEPROM: ");
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int i;
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for (i = 1; i < 6; ++i)
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printf("%02x:", read_eeprom_reg(dev, i));
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printf("%02x\n", read_eeprom_reg(dev, i));
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}
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/**
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* dump_eeprom - dump the whole content of the EEPROM
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*/
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static void dump_eeprom(struct eth_device *dev)
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{
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int i;
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puts("EEPROM:\n");
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for (i = 0; i < 7; ++i)
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printf("%02x: 0x%02x\n", i, read_eeprom_reg(dev, i));
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}
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/**
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* smc911x_init - get the MAC/EEPROM up and ready for use
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*/
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static int smc911x_init(struct eth_device *dev)
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{
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/* See if there is anything there */
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if (!smc911x_detect_chip(dev))
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return 1;
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smc911x_reset(dev);
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/* Make sure we set EEDIO/EECLK to the EEPROM */
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if (smc911x_reg_read(dev, GPIO_CFG) & GPIO_CFG_EEPR_EN) {
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while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
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if (smsc_ctrlc()) {
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printf("init: timeout (E2P_CMD = 0x%08x)\n",
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smc911x_reg_read(dev, E2P_CMD));
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return 1;
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}
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smc911x_reg_write(dev, GPIO_CFG,
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smc911x_reg_read(dev, GPIO_CFG) & ~GPIO_CFG_EEPR_EN);
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}
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return 0;
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}
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/**
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* getline - consume a line of input and handle some escape sequences
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*/
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static char *getline(void)
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{
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static char buffer[100];
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char c;
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size_t i;
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i = 0;
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while (1) {
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buffer[i] = '\0';
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while (!tstc())
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continue;
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c = getc();
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/* Convert to uppercase */
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if (c >= 'a' && c <= 'z')
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c -= ('a' - 'A');
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switch (c) {
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case '\r': /* Enter/Return key */
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case '\n':
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puts("\n");
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return buffer;
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case 0x03: /* ^C - break */
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return NULL;
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case 0x5F:
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case 0x08: /* ^H - backspace */
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case 0x7F: /* DEL - backspace */
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if (i) {
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puts("\b \b");
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i--;
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}
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break;
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default:
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/* Ignore control characters */
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if (c < 0x20)
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break;
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/* Queue up all other characters */
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buffer[i++] = c;
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printf("%c", c);
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break;
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}
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}
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}
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/**
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* smc911x_eeprom - our application's main() function
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*/
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int smc911x_eeprom(int argc, char *argv[])
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{
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/* Avoid initializing on stack as gcc likes to call memset() */
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struct eth_device dev;
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dev.iobase = CONFIG_SMC911X_BASE;
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/* Print the ABI version */
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app_startup(argv);
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if (XF_VERSION != get_version()) {
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printf("Expects ABI version %d\n", XF_VERSION);
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printf("Actual U-Boot ABI version %lu\n", get_version());
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printf("Can't run\n\n");
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return 1;
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}
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/* Initialize the MAC/EEPROM somewhat */
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puts("\n");
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if (smc911x_init(&dev))
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return 1;
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/* Dump helpful usage information */
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puts("\n");
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usage();
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puts("\n");
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while (1) {
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char *line;
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/* Send the prompt and wait for a line */
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puts("eeprom> ");
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line = getline();
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/* Got a ctrl+c */
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if (!line)
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return 0;
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/* Eat leading space */
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line = skip_space(line);
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/* Empty line, try again */
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if (!line[0])
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continue;
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/* Only accept 1 letter commands */
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if (line[0] && line[1] && line[1] != ' ' && line[1] != '\t')
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goto unknown_cmd;
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/* Now parse the command */
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switch (line[0]) {
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case 'W': write_stuff(&dev, line); break;
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case 'D': dump_eeprom(&dev); break;
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case 'M': dump_regs(&dev); break;
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case 'C': copy_from_eeprom(&dev); break;
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case 'P': print_macaddr(&dev); break;
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unknown_cmd:
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default: puts("ERROR: Unknown command!\n\n");
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case '?':
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case 'H': usage(); break;
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case 'Q': return 0;
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}
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}
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}
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