--- /dev/null
+/*
+ * smc911x_eeprom.c - EEPROM interface to SMC911x parts.
+ * Only tested on SMSC9118 though ...
+ *
+ * Copyright 2004-2009 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>
+#include <linux/ctype.h>
+#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(struct eth_device *dev)
+{
+ u8 i, j = 0;
+ for (i = 0x50; i < 0xB8; i += sizeof(u32))
+ printf("%02x: 0x%08x %c", i,
+ smc911x_reg_read(dev, i),
+ (j++ % 2 ? '\n' : ' '));
+}
+
+/**
+ * do_eeprom_cmd - handle eeprom communication
+ */
+static int do_eeprom_cmd(struct eth_device *dev, int cmd, u8 reg)
+{
+ if (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY) {
+ printf("eeprom_cmd: busy at start (E2P_CMD = 0x%08x)\n",
+ smc911x_reg_read(dev, E2P_CMD));
+ return -1;
+ }
+
+ smc911x_reg_write(dev, E2P_CMD, E2P_CMD_EPC_BUSY | cmd | reg);
+
+ while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
+ if (smsc_ctrlc()) {
+ printf("eeprom_cmd: timeout (E2P_CMD = 0x%08x)\n",
+ smc911x_reg_read(dev, E2P_CMD));
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * read_eeprom_reg - read specified register in EEPROM
+ */
+static u8 read_eeprom_reg(struct eth_device *dev, u8 reg)
+{
+ int ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ, reg);
+ return (ret ? : smc911x_reg_read(dev, E2P_DATA));
+}
+
+/**
+ * write_eeprom_reg - write specified value into specified register in EEPROM
+ */
+static int write_eeprom_reg(struct eth_device *dev, u8 value, u8 reg)
+{
+ int ret;
+
+ /* enable erasing/writing */
+ ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN, reg);
+ if (ret)
+ goto done;
+
+ /* erase the eeprom reg */
+ ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE, reg);
+ if (ret)
+ goto done;
+
+ /* write the eeprom reg */
+ smc911x_reg_write(dev, E2P_DATA, value);
+ ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE, reg);
+ if (ret)
+ goto done;
+
+ /* disable erasing/writing */
+ ret = do_eeprom_cmd(dev, 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 (isblank(buf[0]))
+ ++buf;
+ return buf;
+}
+
+/**
+ * write_stuff - handle writing of MAC registers / eeprom
+ */
+static void write_stuff(struct eth_device *dev, 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(dev, value, reg);
+ } else {
+ printf("Writing MAC register %02x with %08x\n", reg, value);
+ smc911x_reg_write(dev, reg, value);
+ }
+}
+
+/**
+ * copy_from_eeprom - copy MAC address in eeprom to address registers
+ */
+static void copy_from_eeprom(struct eth_device *dev)
+{
+ ulong addrl =
+ read_eeprom_reg(dev, 0x01) |
+ read_eeprom_reg(dev, 0x02) << 8 |
+ read_eeprom_reg(dev, 0x03) << 16 |
+ read_eeprom_reg(dev, 0x04) << 24;
+ ulong addrh =
+ read_eeprom_reg(dev, 0x05) |
+ read_eeprom_reg(dev, 0x06) << 8;
+ smc911x_set_mac_csr(dev, ADDRL, addrl);
+ smc911x_set_mac_csr(dev, ADDRH, addrh);
+ puts("EEPROM contents copied to MAC\n");
+}
+
+/**
+ * print_macaddr - print MAC address registers and MAC address in eeprom
+ */
+static void print_macaddr(struct eth_device *dev)
+{
+ puts("Current MAC Address in MAC: ");
+ ulong addrl = smc911x_get_mac_csr(dev, ADDRL);
+ ulong addrh = smc911x_get_mac_csr(dev, 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(dev, i));
+ printf("%02x\n", read_eeprom_reg(dev, i));
+}
+
+/**
+ * dump_eeprom - dump the whole content of the EEPROM
+ */
+static void dump_eeprom(struct eth_device *dev)
+{
+ int i;
+ puts("EEPROM:\n");
+ for (i = 0; i < 7; ++i)
+ printf("%02x: 0x%02x\n", i, read_eeprom_reg(dev, i));
+}
+
+/**
+ * smc911x_init - get the MAC/EEPROM up and ready for use
+ */
+static int smc911x_init(struct eth_device *dev)
+{
+ /* See if there is anything there */
+ if (smc911x_detect_chip(dev))
+ return 1;
+
+ smc911x_reset(dev);
+
+ /* Make sure we set EEDIO/EECLK to the EEPROM */
+ if (smc911x_reg_read(dev, GPIO_CFG) & GPIO_CFG_EEPR_EN) {
+ while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
+ if (smsc_ctrlc()) {
+ printf("init: timeout (E2P_CMD = 0x%08x)\n",
+ smc911x_reg_read(dev, E2P_CMD));
+ return 1;
+ }
+ smc911x_reg_write(dev, GPIO_CFG,
+ smc911x_reg_read(dev, 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 * const argv[])
+{
+ /* Avoid initializing on stack as gcc likes to call memset() */
+ struct eth_device dev;
+ dev.iobase = CONFIG_SMC911X_BASE;
+
+ /* 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(&dev))
+ 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] && !isblank(line[1]))
+ goto unknown_cmd;
+
+ /* Now parse the command */
+ switch (line[0]) {
+ case 'W': write_stuff(&dev, line); break;
+ case 'D': dump_eeprom(&dev); break;
+ case 'M': dump_regs(&dev); break;
+ case 'C': copy_from_eeprom(&dev); break;
+ case 'P': print_macaddr(&dev); break;
+ unknown_cmd:
+ default: puts("ERROR: Unknown command!\n\n");
+ case '?':
+ case 'H': usage(); break;
+ case 'Q': return 0;
+ }
+ }
+}
Code Review / kvmfornfv.git / blobdiff