Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 1 | /* |
| 2 | * smc911x_eeprom.c - EEPROM interface to SMC911x parts. |
| 3 | * Only tested on SMSC9118 though ... |
| 4 | * |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 5 | * Copyright 2004-2009 Analog Devices Inc. |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 6 | * |
| 7 | * Licensed under the GPL-2 or later. |
| 8 | * |
| 9 | * Based on smc91111_eeprom.c which: |
| 10 | * Heavily borrowed from the following peoples GPL'ed software: |
| 11 | * - Wolfgang Denk, DENX Software Engineering, wd@denx.de |
| 12 | * Das U-boot |
| 13 | * - Ladislav Michl ladis@linux-mips.org |
| 14 | * A rejected patch on the U-Boot mailing list |
| 15 | */ |
| 16 | |
| 17 | #include <common.h> |
| 18 | #include <exports.h> |
Jason Hobbs | 4d91a6e | 2011-08-23 11:06:54 +0000 | [diff] [blame] | 19 | #include <linux/ctype.h> |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 20 | #include "../drivers/net/smc911x.h" |
| 21 | |
| 22 | /** |
| 23 | * smsc_ctrlc - detect press of CTRL+C (common ctrlc() isnt exported!?) |
| 24 | */ |
| 25 | static int smsc_ctrlc(void) |
| 26 | { |
| 27 | return (tstc() && getc() == 0x03); |
| 28 | } |
| 29 | |
| 30 | /** |
| 31 | * usage - dump usage information |
| 32 | */ |
| 33 | static void usage(void) |
| 34 | { |
| 35 | puts( |
| 36 | "MAC/EEPROM Commands:\n" |
| 37 | " P : Print the MAC addresses\n" |
| 38 | " D : Dump the EEPROM contents\n" |
| 39 | " M : Dump the MAC contents\n" |
| 40 | " C : Copy the MAC address from the EEPROM to the MAC\n" |
| 41 | " W : Write a register in the EEPROM or in the MAC\n" |
| 42 | " Q : Quit\n" |
| 43 | "\n" |
| 44 | "Some commands take arguments:\n" |
| 45 | " W <E|M> <register> <value>\n" |
| 46 | " E: EEPROM M: MAC\n" |
| 47 | ); |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * dump_regs - dump the MAC registers |
| 52 | * |
| 53 | * Registers 0x00 - 0x50 are FIFOs. The 0x50+ are the control registers |
| 54 | * and they're all 32bits long. 0xB8+ are reserved, so don't bother. |
| 55 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 56 | static void dump_regs(struct eth_device *dev) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 57 | { |
| 58 | u8 i, j = 0; |
| 59 | for (i = 0x50; i < 0xB8; i += sizeof(u32)) |
Mike Frysinger | 069f436 | 2009-02-25 17:29:40 -0500 | [diff] [blame] | 60 | printf("%02x: 0x%08x %c", i, |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 61 | smc911x_reg_read(dev, i), |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 62 | (j++ % 2 ? '\n' : ' ')); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * do_eeprom_cmd - handle eeprom communication |
| 67 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 68 | static int do_eeprom_cmd(struct eth_device *dev, int cmd, u8 reg) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 69 | { |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 70 | if (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY) { |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 71 | printf("eeprom_cmd: busy at start (E2P_CMD = 0x%08x)\n", |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 72 | smc911x_reg_read(dev, E2P_CMD)); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 73 | return -1; |
| 74 | } |
| 75 | |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 76 | smc911x_reg_write(dev, E2P_CMD, E2P_CMD_EPC_BUSY | cmd | reg); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 77 | |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 78 | while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 79 | if (smsc_ctrlc()) { |
| 80 | printf("eeprom_cmd: timeout (E2P_CMD = 0x%08x)\n", |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 81 | smc911x_reg_read(dev, E2P_CMD)); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 82 | return -1; |
| 83 | } |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * read_eeprom_reg - read specified register in EEPROM |
| 90 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 91 | static u8 read_eeprom_reg(struct eth_device *dev, u8 reg) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 92 | { |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 93 | int ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ, reg); |
| 94 | return (ret ? : smc911x_reg_read(dev, E2P_DATA)); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | /** |
| 98 | * write_eeprom_reg - write specified value into specified register in EEPROM |
| 99 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 100 | static int write_eeprom_reg(struct eth_device *dev, u8 value, u8 reg) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 101 | { |
| 102 | int ret; |
| 103 | |
| 104 | /* enable erasing/writing */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 105 | ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN, reg); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 106 | if (ret) |
| 107 | goto done; |
| 108 | |
| 109 | /* erase the eeprom reg */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 110 | ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE, reg); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 111 | if (ret) |
| 112 | goto done; |
| 113 | |
| 114 | /* write the eeprom reg */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 115 | smc911x_reg_write(dev, E2P_DATA, value); |
| 116 | ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE, reg); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 117 | if (ret) |
| 118 | goto done; |
| 119 | |
| 120 | /* disable erasing/writing */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 121 | ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWDS, reg); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 122 | |
| 123 | done: |
| 124 | return ret; |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * skip_space - find first non-whitespace in given pointer |
| 129 | */ |
| 130 | static char *skip_space(char *buf) |
| 131 | { |
Jason Hobbs | 4d91a6e | 2011-08-23 11:06:54 +0000 | [diff] [blame] | 132 | while (isblank(buf[0])) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 133 | ++buf; |
| 134 | return buf; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * write_stuff - handle writing of MAC registers / eeprom |
| 139 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 140 | static void write_stuff(struct eth_device *dev, char *line) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 141 | { |
| 142 | char dest; |
| 143 | char *endp; |
| 144 | u8 reg; |
| 145 | u32 value; |
| 146 | |
| 147 | /* Skip over the "W " part of the command */ |
| 148 | line = skip_space(line + 1); |
| 149 | |
| 150 | /* Figure out destination */ |
| 151 | switch (line[0]) { |
| 152 | case 'E': |
| 153 | case 'M': |
| 154 | dest = line[0]; |
| 155 | break; |
| 156 | default: |
| 157 | invalid_usage: |
| 158 | printf("ERROR: Invalid write usage\n"); |
| 159 | usage(); |
| 160 | return; |
| 161 | } |
| 162 | |
| 163 | /* Get the register to write */ |
| 164 | line = skip_space(line + 1); |
| 165 | reg = simple_strtoul(line, &endp, 16); |
| 166 | if (line == endp) |
| 167 | goto invalid_usage; |
| 168 | |
| 169 | /* Get the value to write */ |
| 170 | line = skip_space(endp); |
| 171 | value = simple_strtoul(line, &endp, 16); |
| 172 | if (line == endp) |
| 173 | goto invalid_usage; |
| 174 | |
| 175 | /* Check for trailing cruft */ |
| 176 | line = skip_space(endp); |
| 177 | if (line[0]) |
| 178 | goto invalid_usage; |
| 179 | |
| 180 | /* Finally, execute the command */ |
| 181 | if (dest == 'E') { |
| 182 | printf("Writing EEPROM register %02x with %02x\n", reg, value); |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 183 | write_eeprom_reg(dev, value, reg); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 184 | } else { |
| 185 | printf("Writing MAC register %02x with %08x\n", reg, value); |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 186 | smc911x_reg_write(dev, reg, value); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 187 | } |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * copy_from_eeprom - copy MAC address in eeprom to address registers |
| 192 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 193 | static void copy_from_eeprom(struct eth_device *dev) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 194 | { |
| 195 | ulong addrl = |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 196 | read_eeprom_reg(dev, 0x01) | |
| 197 | read_eeprom_reg(dev, 0x02) << 8 | |
| 198 | read_eeprom_reg(dev, 0x03) << 16 | |
| 199 | read_eeprom_reg(dev, 0x04) << 24; |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 200 | ulong addrh = |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 201 | read_eeprom_reg(dev, 0x05) | |
| 202 | read_eeprom_reg(dev, 0x06) << 8; |
| 203 | smc911x_set_mac_csr(dev, ADDRL, addrl); |
| 204 | smc911x_set_mac_csr(dev, ADDRH, addrh); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 205 | puts("EEPROM contents copied to MAC\n"); |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * print_macaddr - print MAC address registers and MAC address in eeprom |
| 210 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 211 | static void print_macaddr(struct eth_device *dev) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 212 | { |
| 213 | puts("Current MAC Address in MAC: "); |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 214 | ulong addrl = smc911x_get_mac_csr(dev, ADDRL); |
| 215 | ulong addrh = smc911x_get_mac_csr(dev, ADDRH); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 216 | printf("%02x:%02x:%02x:%02x:%02x:%02x\n", |
| 217 | (u8)(addrl), (u8)(addrl >> 8), (u8)(addrl >> 16), |
| 218 | (u8)(addrl >> 24), (u8)(addrh), (u8)(addrh >> 8)); |
| 219 | |
| 220 | puts("Current MAC Address in EEPROM: "); |
| 221 | int i; |
| 222 | for (i = 1; i < 6; ++i) |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 223 | printf("%02x:", read_eeprom_reg(dev, i)); |
| 224 | printf("%02x\n", read_eeprom_reg(dev, i)); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | /** |
| 228 | * dump_eeprom - dump the whole content of the EEPROM |
| 229 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 230 | static void dump_eeprom(struct eth_device *dev) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 231 | { |
| 232 | int i; |
| 233 | puts("EEPROM:\n"); |
| 234 | for (i = 0; i < 7; ++i) |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 235 | printf("%02x: 0x%02x\n", i, read_eeprom_reg(dev, i)); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | /** |
| 239 | * smc911x_init - get the MAC/EEPROM up and ready for use |
| 240 | */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 241 | static int smc911x_init(struct eth_device *dev) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 242 | { |
| 243 | /* See if there is anything there */ |
Juergen Kilb | aa9fba5 | 2010-06-12 21:22:01 +0200 | [diff] [blame] | 244 | if (smc911x_detect_chip(dev)) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 245 | return 1; |
| 246 | |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 247 | smc911x_reset(dev); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 248 | |
| 249 | /* Make sure we set EEDIO/EECLK to the EEPROM */ |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 250 | if (smc911x_reg_read(dev, GPIO_CFG) & GPIO_CFG_EEPR_EN) { |
| 251 | while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 252 | if (smsc_ctrlc()) { |
Mike Frysinger | 069f436 | 2009-02-25 17:29:40 -0500 | [diff] [blame] | 253 | printf("init: timeout (E2P_CMD = 0x%08x)\n", |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 254 | smc911x_reg_read(dev, E2P_CMD)); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 255 | return 1; |
| 256 | } |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 257 | smc911x_reg_write(dev, GPIO_CFG, |
| 258 | smc911x_reg_read(dev, GPIO_CFG) & ~GPIO_CFG_EEPR_EN); |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * getline - consume a line of input and handle some escape sequences |
| 266 | */ |
| 267 | static char *getline(void) |
| 268 | { |
| 269 | static char buffer[100]; |
| 270 | char c; |
| 271 | size_t i; |
| 272 | |
| 273 | i = 0; |
| 274 | while (1) { |
| 275 | buffer[i] = '\0'; |
| 276 | while (!tstc()) |
| 277 | continue; |
| 278 | |
| 279 | c = getc(); |
| 280 | /* Convert to uppercase */ |
| 281 | if (c >= 'a' && c <= 'z') |
| 282 | c -= ('a' - 'A'); |
| 283 | |
| 284 | switch (c) { |
| 285 | case '\r': /* Enter/Return key */ |
| 286 | case '\n': |
| 287 | puts("\n"); |
| 288 | return buffer; |
| 289 | |
| 290 | case 0x03: /* ^C - break */ |
| 291 | return NULL; |
| 292 | |
| 293 | case 0x5F: |
| 294 | case 0x08: /* ^H - backspace */ |
| 295 | case 0x7F: /* DEL - backspace */ |
| 296 | if (i) { |
| 297 | puts("\b \b"); |
| 298 | i--; |
| 299 | } |
| 300 | break; |
| 301 | |
| 302 | default: |
| 303 | /* Ignore control characters */ |
| 304 | if (c < 0x20) |
| 305 | break; |
| 306 | /* Queue up all other characters */ |
| 307 | buffer[i++] = c; |
| 308 | printf("%c", c); |
| 309 | break; |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * smc911x_eeprom - our application's main() function |
| 316 | */ |
Wolfgang Denk | 54841ab | 2010-06-28 22:00:46 +0200 | [diff] [blame] | 317 | int smc911x_eeprom(int argc, char * const argv[]) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 318 | { |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 319 | /* Avoid initializing on stack as gcc likes to call memset() */ |
| 320 | struct eth_device dev; |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 321 | dev.iobase = CONFIG_SMC911X_BASE; |
| 322 | |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 323 | /* Print the ABI version */ |
| 324 | app_startup(argv); |
| 325 | if (XF_VERSION != get_version()) { |
| 326 | printf("Expects ABI version %d\n", XF_VERSION); |
| 327 | printf("Actual U-Boot ABI version %lu\n", get_version()); |
| 328 | printf("Can't run\n\n"); |
| 329 | return 1; |
| 330 | } |
| 331 | |
| 332 | /* Initialize the MAC/EEPROM somewhat */ |
| 333 | puts("\n"); |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 334 | if (smc911x_init(&dev)) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 335 | return 1; |
| 336 | |
| 337 | /* Dump helpful usage information */ |
| 338 | puts("\n"); |
| 339 | usage(); |
| 340 | puts("\n"); |
| 341 | |
| 342 | while (1) { |
| 343 | char *line; |
| 344 | |
| 345 | /* Send the prompt and wait for a line */ |
| 346 | puts("eeprom> "); |
| 347 | line = getline(); |
| 348 | |
| 349 | /* Got a ctrl+c */ |
| 350 | if (!line) |
| 351 | return 0; |
| 352 | |
| 353 | /* Eat leading space */ |
| 354 | line = skip_space(line); |
| 355 | |
| 356 | /* Empty line, try again */ |
| 357 | if (!line[0]) |
| 358 | continue; |
| 359 | |
| 360 | /* Only accept 1 letter commands */ |
Jason Hobbs | 4d91a6e | 2011-08-23 11:06:54 +0000 | [diff] [blame] | 361 | if (line[0] && line[1] && !isblank(line[1])) |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 362 | goto unknown_cmd; |
| 363 | |
| 364 | /* Now parse the command */ |
| 365 | switch (line[0]) { |
Mike Frysinger | c44efcf | 2009-11-12 22:26:02 -0500 | [diff] [blame] | 366 | case 'W': write_stuff(&dev, line); break; |
| 367 | case 'D': dump_eeprom(&dev); break; |
| 368 | case 'M': dump_regs(&dev); break; |
| 369 | case 'C': copy_from_eeprom(&dev); break; |
| 370 | case 'P': print_macaddr(&dev); break; |
Mike Frysinger | ad2d163 | 2008-12-22 02:56:07 -0500 | [diff] [blame] | 371 | unknown_cmd: |
| 372 | default: puts("ERROR: Unknown command!\n\n"); |
| 373 | case '?': |
| 374 | case 'H': usage(); break; |
| 375 | case 'Q': return 0; |
| 376 | } |
| 377 | } |
| 378 | } |