mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-28 21:09:00 +09:00
![Bin Meng](/assets/img/avatar_default.png)
Correct spelling of "U-Boot" shall be used in all written text (documentation, comments in source files etc.). Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
380 lines
8.2 KiB
C
380 lines
8.2 KiB
C
/*
|
|
* 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 <console.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;
|
|
}
|
|
}
|
|
}
|