2 * smc911x_eeprom.c - EEPROM interface to SMC911x parts.
3 * Only tested on SMSC9118 though ...
5 * Copyright 2004-2009 Analog Devices Inc.
7 * Licensed under the GPL-2 or later.
9 * Based on smc91111_eeprom.c which:
10 * Heavily borrowed from the following peoples GPL'ed software:
14 * A rejected patch on the U-Boot mailing list
21 #include <linux/ctype.h>
22 #include <linux/types.h>
23 #include "../drivers/net/smc911x.h"
25 #define DRIVERNAME "smc911x"
27 #if defined (CONFIG_SMC911X_32_BIT) && \
28 defined (CONFIG_SMC911X_16_BIT)
29 #error "SMC911X: Only one of CONFIG_SMC911X_32_BIT and \
30 CONFIG_SMC911X_16_BIT shall be set"
38 static const struct chip_id chip_ids[] = {
39 { CHIP_89218, "LAN89218" },
40 { CHIP_9115, "LAN9115" },
41 { CHIP_9116, "LAN9116" },
42 { CHIP_9117, "LAN9117" },
43 { CHIP_9118, "LAN9118" },
44 { CHIP_9211, "LAN9211" },
45 { CHIP_9215, "LAN9215" },
46 { CHIP_9216, "LAN9216" },
47 { CHIP_9217, "LAN9217" },
48 { CHIP_9218, "LAN9218" },
49 { CHIP_9220, "LAN9220" },
50 { CHIP_9221, "LAN9221" },
54 #if defined (CONFIG_SMC911X_32_BIT)
55 static u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
57 return *(volatile u32*)(dev->iobase + offset);
60 static void smc911x_reg_write(struct eth_device *dev, u32 offset, u32 val)
62 *(volatile u32*)(dev->iobase + offset) = val;
64 #elif defined (CONFIG_SMC911X_16_BIT)
65 static u32 smc911x_reg_read(struct eth_device *dev, u32 offset)
67 volatile u16 *addr_16 = (u16 *)(dev->iobase + offset);
68 return (*addr_16 & 0x0000ffff) | (*(addr_16 + 1) << 16);
70 static void smc911x_reg_write(struct eth_device *dev, u32 offset, u32 val)
72 *(volatile u16 *)(dev->iobase + offset) = (u16)val;
73 *(volatile u16 *)(dev->iobase + offset + 2) = (u16)(val >> 16);
76 #error "SMC911X: undefined bus width"
77 #endif /* CONFIG_SMC911X_16_BIT */
79 static u32 smc911x_get_mac_csr(struct eth_device *dev, u8 reg)
81 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
83 smc911x_reg_write(dev, MAC_CSR_CMD,
84 MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_R_NOT_W | reg);
85 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
88 return smc911x_reg_read(dev, MAC_CSR_DATA);
91 static void smc911x_set_mac_csr(struct eth_device *dev, u8 reg, u32 data)
93 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
95 smc911x_reg_write(dev, MAC_CSR_DATA, data);
96 smc911x_reg_write(dev, MAC_CSR_CMD, MAC_CSR_CMD_CSR_BUSY | reg);
97 while (smc911x_reg_read(dev, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
101 static int smc911x_detect_chip(struct eth_device *dev)
103 unsigned long val, i;
105 val = smc911x_reg_read(dev, BYTE_TEST);
106 if (val == 0xffffffff) {
107 /* Special case -- no chip present */
109 } else if (val != 0x87654321) {
110 printf(DRIVERNAME ": Invalid chip endian 0x%08lx\n", val);
114 val = smc911x_reg_read(dev, ID_REV) >> 16;
115 for (i = 0; chip_ids[i].id != 0; i++) {
116 if (chip_ids[i].id == val) break;
118 if (!chip_ids[i].id) {
119 printf(DRIVERNAME ": Unknown chip ID %04lx\n", val);
123 dev->priv = (void *)&chip_ids[i];
128 static void smc911x_reset(struct eth_device *dev)
133 * Take out of PM setting first
134 * Device is already wake up if PMT_CTRL_READY bit is set
136 if ((smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY) == 0) {
137 /* Write to the bytetest will take out of powerdown */
138 smc911x_reg_write(dev, BYTE_TEST, 0x0);
143 !(smc911x_reg_read(dev, PMT_CTRL) & PMT_CTRL_READY))
147 ": timeout waiting for PM restore\n");
152 /* Disable interrupts */
153 smc911x_reg_write(dev, INT_EN, 0);
155 smc911x_reg_write(dev, HW_CFG, HW_CFG_SRST);
158 while (timeout-- && smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
162 printf(DRIVERNAME ": reset timeout\n");
166 /* Reset the FIFO level and flow control settings */
167 smc911x_set_mac_csr(dev, FLOW, FLOW_FCPT | FLOW_FCEN);
168 smc911x_reg_write(dev, AFC_CFG, 0x0050287F);
170 /* Set to LED outputs */
171 smc911x_reg_write(dev, GPIO_CFG, 0x70070000);
175 * smsc_ctrlc - detect press of CTRL+C (common ctrlc() isnt exported!?)
177 static int smsc_ctrlc(void)
179 return (tstc() && getc() == 0x03);
183 * usage - dump usage information
185 static void usage(void)
188 "MAC/EEPROM Commands:\n"
189 " P : Print the MAC addresses\n"
190 " D : Dump the EEPROM contents\n"
191 " M : Dump the MAC contents\n"
192 " C : Copy the MAC address from the EEPROM to the MAC\n"
193 " W : Write a register in the EEPROM or in the MAC\n"
196 "Some commands take arguments:\n"
197 " W <E|M> <register> <value>\n"
198 " E: EEPROM M: MAC\n"
203 * dump_regs - dump the MAC registers
205 * Registers 0x00 - 0x50 are FIFOs. The 0x50+ are the control registers
206 * and they're all 32bits long. 0xB8+ are reserved, so don't bother.
208 static void dump_regs(struct eth_device *dev)
211 for (i = 0x50; i < 0xB8; i += sizeof(u32))
212 printf("%02x: 0x%08x %c", i,
213 smc911x_reg_read(dev, i),
214 (j++ % 2 ? '\n' : ' '));
218 * do_eeprom_cmd - handle eeprom communication
220 static int do_eeprom_cmd(struct eth_device *dev, int cmd, u8 reg)
222 if (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY) {
223 printf("eeprom_cmd: busy at start (E2P_CMD = 0x%08x)\n",
224 smc911x_reg_read(dev, E2P_CMD));
228 smc911x_reg_write(dev, E2P_CMD, E2P_CMD_EPC_BUSY | cmd | reg);
230 while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
232 printf("eeprom_cmd: timeout (E2P_CMD = 0x%08x)\n",
233 smc911x_reg_read(dev, E2P_CMD));
241 * read_eeprom_reg - read specified register in EEPROM
243 static u8 read_eeprom_reg(struct eth_device *dev, u8 reg)
245 int ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_READ, reg);
246 return (ret ? : smc911x_reg_read(dev, E2P_DATA));
250 * write_eeprom_reg - write specified value into specified register in EEPROM
252 static int write_eeprom_reg(struct eth_device *dev, u8 value, u8 reg)
256 /* enable erasing/writing */
257 ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWEN, reg);
261 /* erase the eeprom reg */
262 ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_ERASE, reg);
266 /* write the eeprom reg */
267 smc911x_reg_write(dev, E2P_DATA, value);
268 ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_WRITE, reg);
272 /* disable erasing/writing */
273 ret = do_eeprom_cmd(dev, E2P_CMD_EPC_CMD_EWDS, reg);
280 * skip_space - find first non-whitespace in given pointer
282 static char *skip_space(char *buf)
284 while (isblank(buf[0]))
290 * write_stuff - handle writing of MAC registers / eeprom
292 static void write_stuff(struct eth_device *dev, char *line)
299 /* Skip over the "W " part of the command */
300 line = skip_space(line + 1);
302 /* Figure out destination */
310 printf("ERROR: Invalid write usage\n");
315 /* Get the register to write */
316 line = skip_space(line + 1);
317 reg = simple_strtoul(line, &endp, 16);
321 /* Get the value to write */
322 line = skip_space(endp);
323 value = simple_strtoul(line, &endp, 16);
327 /* Check for trailing cruft */
328 line = skip_space(endp);
332 /* Finally, execute the command */
334 printf("Writing EEPROM register %02x with %02x\n", reg, value);
335 write_eeprom_reg(dev, value, reg);
337 printf("Writing MAC register %02x with %08x\n", reg, value);
338 smc911x_reg_write(dev, reg, value);
343 * copy_from_eeprom - copy MAC address in eeprom to address registers
345 static void copy_from_eeprom(struct eth_device *dev)
348 read_eeprom_reg(dev, 0x01) |
349 read_eeprom_reg(dev, 0x02) << 8 |
350 read_eeprom_reg(dev, 0x03) << 16 |
351 read_eeprom_reg(dev, 0x04) << 24;
353 read_eeprom_reg(dev, 0x05) |
354 read_eeprom_reg(dev, 0x06) << 8;
355 smc911x_set_mac_csr(dev, ADDRL, addrl);
356 smc911x_set_mac_csr(dev, ADDRH, addrh);
357 puts("EEPROM contents copied to MAC\n");
361 * print_macaddr - print MAC address registers and MAC address in eeprom
363 static void print_macaddr(struct eth_device *dev)
365 puts("Current MAC Address in MAC: ");
366 ulong addrl = smc911x_get_mac_csr(dev, ADDRL);
367 ulong addrh = smc911x_get_mac_csr(dev, ADDRH);
368 printf("%02x:%02x:%02x:%02x:%02x:%02x\n",
369 (u8)(addrl), (u8)(addrl >> 8), (u8)(addrl >> 16),
370 (u8)(addrl >> 24), (u8)(addrh), (u8)(addrh >> 8));
372 puts("Current MAC Address in EEPROM: ");
374 for (i = 1; i < 6; ++i)
375 printf("%02x:", read_eeprom_reg(dev, i));
376 printf("%02x\n", read_eeprom_reg(dev, i));
380 * dump_eeprom - dump the whole content of the EEPROM
382 static void dump_eeprom(struct eth_device *dev)
386 for (i = 0; i < 7; ++i)
387 printf("%02x: 0x%02x\n", i, read_eeprom_reg(dev, i));
391 * smc911x_init - get the MAC/EEPROM up and ready for use
393 static int smc911x_init(struct eth_device *dev)
395 /* See if there is anything there */
396 if (smc911x_detect_chip(dev))
401 /* Make sure we set EEDIO/EECLK to the EEPROM */
402 if (smc911x_reg_read(dev, GPIO_CFG) & GPIO_CFG_EEPR_EN) {
403 while (smc911x_reg_read(dev, E2P_CMD) & E2P_CMD_EPC_BUSY)
405 printf("init: timeout (E2P_CMD = 0x%08x)\n",
406 smc911x_reg_read(dev, E2P_CMD));
409 smc911x_reg_write(dev, GPIO_CFG,
410 smc911x_reg_read(dev, GPIO_CFG) & ~GPIO_CFG_EEPR_EN);
417 * getline - consume a line of input and handle some escape sequences
419 static char *getline(void)
421 static char buffer[100];
432 /* Convert to uppercase */
433 if (c >= 'a' && c <= 'z')
437 case '\r': /* Enter/Return key */
442 case 0x03: /* ^C - break */
446 case 0x08: /* ^H - backspace */
447 case 0x7F: /* DEL - backspace */
455 /* Ignore control characters */
458 /* Queue up all other characters */
467 * smc911x_eeprom - our application's main() function
469 int smc911x_eeprom(int argc, char *const argv[])
471 /* Avoid initializing on stack as gcc likes to call memset() */
472 struct eth_device dev;
473 dev.iobase = CONFIG_SMC911X_BASE;
475 /* Print the ABI version */
477 if (XF_VERSION != get_version()) {
478 printf("Expects ABI version %d\n", XF_VERSION);
479 printf("Actual U-Boot ABI version %lu\n", get_version());
480 printf("Can't run\n\n");
484 /* Initialize the MAC/EEPROM somewhat */
486 if (smc911x_init(&dev))
489 /* Dump helpful usage information */
497 /* Send the prompt and wait for a line */
505 /* Eat leading space */
506 line = skip_space(line);
508 /* Empty line, try again */
512 /* Only accept 1 letter commands */
513 if (line[0] && line[1] && !isblank(line[1]))
516 /* Now parse the command */
518 case 'W': write_stuff(&dev, line); break;
519 case 'D': dump_eeprom(&dev); break;
520 case 'M': dump_regs(&dev); break;
521 case 'C': copy_from_eeprom(&dev); break;
522 case 'P': print_macaddr(&dev); break;
524 default: puts("ERROR: Unknown command!\n\n");
526 case 'H': usage(); break;