183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
22e192b24SSimon Glass /*
32e192b24SSimon Glass * (C) Copyright 2000, 2001
42e192b24SSimon Glass * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
52e192b24SSimon Glass */
62e192b24SSimon Glass
72e192b24SSimon Glass /*
82e192b24SSimon Glass * Support for read and write access to EEPROM like memory devices. This
92e192b24SSimon Glass * includes regular EEPROM as well as FRAM (ferroelectic nonvolaile RAM).
102e192b24SSimon Glass * FRAM devices read and write data at bus speed. In particular, there is no
112e192b24SSimon Glass * write delay. Also, there is no limit imposed on the number of bytes that can
122e192b24SSimon Glass * be transferred with a single read or write.
132e192b24SSimon Glass *
142e192b24SSimon Glass * Use the following configuration options to ensure no unneeded performance
152e192b24SSimon Glass * degradation (typical for EEPROM) is incured for FRAM memory:
162e192b24SSimon Glass *
172e192b24SSimon Glass * #define CONFIG_SYS_I2C_FRAM
182e192b24SSimon Glass * #undef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
192e192b24SSimon Glass *
202e192b24SSimon Glass */
212e192b24SSimon Glass
222e192b24SSimon Glass #include <common.h>
232e192b24SSimon Glass #include <config.h>
242e192b24SSimon Glass #include <command.h>
252e192b24SSimon Glass #include <i2c.h>
26e7c2729bSNikita Kiryanov #include <eeprom_layout.h>
272e192b24SSimon Glass
282e192b24SSimon Glass #ifndef CONFIG_SYS_I2C_SPEED
292e192b24SSimon Glass #define CONFIG_SYS_I2C_SPEED 50000
302e192b24SSimon Glass #endif
312e192b24SSimon Glass
322e192b24SSimon Glass #ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
332e192b24SSimon Glass #define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 0
342e192b24SSimon Glass #endif
352e192b24SSimon Glass
362e192b24SSimon Glass #ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_BITS
372e192b24SSimon Glass #define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 8
382e192b24SSimon Glass #endif
392e192b24SSimon Glass
40a6e7b774SMario Six #ifndef I2C_RXTX_LEN
41a6e7b774SMario Six #define I2C_RXTX_LEN 128
42a6e7b774SMario Six #endif
43a6e7b774SMario Six
442e192b24SSimon Glass #define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)
452e192b24SSimon Glass #define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1))
462e192b24SSimon Glass
472e192b24SSimon Glass /*
482e192b24SSimon Glass * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is
492e192b24SSimon Glass * 0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM.
502e192b24SSimon Glass *
512e192b24SSimon Glass * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is
522e192b24SSimon Glass * 0x00000nxx for EEPROM address selectors and page number at n.
532e192b24SSimon Glass */
542e192b24SSimon Glass #if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
552e192b24SSimon Glass #if !defined(CONFIG_SYS_I2C_EEPROM_ADDR_LEN) || \
562e192b24SSimon Glass (CONFIG_SYS_I2C_EEPROM_ADDR_LEN < 1) || \
572e192b24SSimon Glass (CONFIG_SYS_I2C_EEPROM_ADDR_LEN > 2)
582e192b24SSimon Glass #error CONFIG_SYS_I2C_EEPROM_ADDR_LEN must be 1 or 2
592e192b24SSimon Glass #endif
602e192b24SSimon Glass #endif
612e192b24SSimon Glass
eeprom_write_enable(unsigned dev_addr,int state)622e192b24SSimon Glass __weak int eeprom_write_enable(unsigned dev_addr, int state)
632e192b24SSimon Glass {
642e192b24SSimon Glass return 0;
652e192b24SSimon Glass }
662e192b24SSimon Glass
eeprom_init(int bus)672e192b24SSimon Glass void eeprom_init(int bus)
682e192b24SSimon Glass {
692e192b24SSimon Glass /* I2C EEPROM */
702e192b24SSimon Glass #if defined(CONFIG_SYS_I2C)
712e192b24SSimon Glass if (bus >= 0)
722e192b24SSimon Glass i2c_set_bus_num(bus);
732e192b24SSimon Glass i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
742e192b24SSimon Glass #endif
752e192b24SSimon Glass }
762e192b24SSimon Glass
eeprom_addr(unsigned dev_addr,unsigned offset,uchar * addr)772e192b24SSimon Glass static int eeprom_addr(unsigned dev_addr, unsigned offset, uchar *addr)
782e192b24SSimon Glass {
792e192b24SSimon Glass unsigned blk_off;
802e192b24SSimon Glass int alen;
812e192b24SSimon Glass
822e192b24SSimon Glass blk_off = offset & 0xff; /* block offset */
832e192b24SSimon Glass #if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1
842e192b24SSimon Glass addr[0] = offset >> 8; /* block number */
852e192b24SSimon Glass addr[1] = blk_off; /* block offset */
862e192b24SSimon Glass alen = 2;
872e192b24SSimon Glass #else
882e192b24SSimon Glass addr[0] = offset >> 16; /* block number */
892e192b24SSimon Glass addr[1] = offset >> 8; /* upper address octet */
902e192b24SSimon Glass addr[2] = blk_off; /* lower address octet */
912e192b24SSimon Glass alen = 3;
922e192b24SSimon Glass #endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN */
932e192b24SSimon Glass
942e192b24SSimon Glass addr[0] |= dev_addr; /* insert device address */
952e192b24SSimon Glass
962e192b24SSimon Glass return alen;
972e192b24SSimon Glass }
982e192b24SSimon Glass
eeprom_len(unsigned offset,unsigned end)992e192b24SSimon Glass static int eeprom_len(unsigned offset, unsigned end)
1002e192b24SSimon Glass {
1012e192b24SSimon Glass unsigned len = end - offset;
1022e192b24SSimon Glass
1032e192b24SSimon Glass /*
1042e192b24SSimon Glass * For a FRAM device there is no limit on the number of the
1052e192b24SSimon Glass * bytes that can be ccessed with the single read or write
1062e192b24SSimon Glass * operation.
1072e192b24SSimon Glass */
1082e192b24SSimon Glass #if !defined(CONFIG_SYS_I2C_FRAM)
1092e192b24SSimon Glass unsigned blk_off = offset & 0xff;
1102e192b24SSimon Glass unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
1112e192b24SSimon Glass
1122e192b24SSimon Glass if (maxlen > I2C_RXTX_LEN)
1132e192b24SSimon Glass maxlen = I2C_RXTX_LEN;
1142e192b24SSimon Glass
1152e192b24SSimon Glass if (len > maxlen)
1162e192b24SSimon Glass len = maxlen;
1172e192b24SSimon Glass #endif
1182e192b24SSimon Glass
1192e192b24SSimon Glass return len;
1202e192b24SSimon Glass }
1212e192b24SSimon Glass
eeprom_rw_block(unsigned offset,uchar * addr,unsigned alen,uchar * buffer,unsigned len,bool read)1222e192b24SSimon Glass static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
1232e192b24SSimon Glass uchar *buffer, unsigned len, bool read)
1242e192b24SSimon Glass {
1252e192b24SSimon Glass int ret = 0;
1262e192b24SSimon Glass
127*0c07a9b4SLukasz Majewski #if defined(CONFIG_DM_I2C) && defined(CONFIG_SYS_I2C_EEPROM_BUS)
128*0c07a9b4SLukasz Majewski struct udevice *dev;
129*0c07a9b4SLukasz Majewski
130*0c07a9b4SLukasz Majewski ret = i2c_get_chip_for_busnum(CONFIG_SYS_I2C_EEPROM_BUS, addr[0],
131*0c07a9b4SLukasz Majewski alen - 1, &dev);
132*0c07a9b4SLukasz Majewski if (ret) {
133*0c07a9b4SLukasz Majewski printf("%s: Cannot find udev for a bus %d\n", __func__,
134*0c07a9b4SLukasz Majewski CONFIG_SYS_I2C_EEPROM_BUS);
135*0c07a9b4SLukasz Majewski return CMD_RET_FAILURE;
136*0c07a9b4SLukasz Majewski }
137*0c07a9b4SLukasz Majewski
138*0c07a9b4SLukasz Majewski if (read)
139*0c07a9b4SLukasz Majewski ret = dm_i2c_read(dev, offset, buffer, len);
140*0c07a9b4SLukasz Majewski else
141*0c07a9b4SLukasz Majewski ret = dm_i2c_write(dev, offset, buffer, len);
142*0c07a9b4SLukasz Majewski
143*0c07a9b4SLukasz Majewski #else /* Non DM I2C support - will be removed */
1442e192b24SSimon Glass #if defined(CONFIG_SYS_I2C_EEPROM_BUS)
1452e192b24SSimon Glass i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
1462e192b24SSimon Glass #endif
1472e192b24SSimon Glass
1482e192b24SSimon Glass if (read)
1492e192b24SSimon Glass ret = i2c_read(addr[0], offset, alen - 1, buffer, len);
1502e192b24SSimon Glass else
1512e192b24SSimon Glass ret = i2c_write(addr[0], offset, alen - 1, buffer, len);
152*0c07a9b4SLukasz Majewski #endif /* CONFIG_DM_I2C && CONFIG_SYS_I2C_EEPROM_BUS */
153*0c07a9b4SLukasz Majewski if (ret)
154*0c07a9b4SLukasz Majewski ret = CMD_RET_FAILURE;
155*0c07a9b4SLukasz Majewski
1562e192b24SSimon Glass return ret;
1572e192b24SSimon Glass }
1582e192b24SSimon Glass
eeprom_rw(unsigned dev_addr,unsigned offset,uchar * buffer,unsigned cnt,bool read)1592e192b24SSimon Glass static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer,
1602e192b24SSimon Glass unsigned cnt, bool read)
1612e192b24SSimon Glass {
1622e192b24SSimon Glass unsigned end = offset + cnt;
1632e192b24SSimon Glass unsigned alen, len;
1642e192b24SSimon Glass int rcode = 0;
1652e192b24SSimon Glass uchar addr[3];
1662e192b24SSimon Glass
1672e192b24SSimon Glass while (offset < end) {
1682e192b24SSimon Glass alen = eeprom_addr(dev_addr, offset, addr);
1692e192b24SSimon Glass
1702e192b24SSimon Glass len = eeprom_len(offset, end);
1712e192b24SSimon Glass
1722e192b24SSimon Glass rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read);
1732e192b24SSimon Glass
1742e192b24SSimon Glass buffer += len;
1752e192b24SSimon Glass offset += len;
1762e192b24SSimon Glass
1772e192b24SSimon Glass if (!read)
1782e192b24SSimon Glass udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
1792e192b24SSimon Glass }
1802e192b24SSimon Glass
1812e192b24SSimon Glass return rcode;
1822e192b24SSimon Glass }
1832e192b24SSimon Glass
eeprom_read(unsigned dev_addr,unsigned offset,uchar * buffer,unsigned cnt)1842e192b24SSimon Glass int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
1852e192b24SSimon Glass {
1862e192b24SSimon Glass /*
1872e192b24SSimon Glass * Read data until done or would cross a page boundary.
1882e192b24SSimon Glass * We must write the address again when changing pages
1892e192b24SSimon Glass * because the next page may be in a different device.
1902e192b24SSimon Glass */
1912e192b24SSimon Glass return eeprom_rw(dev_addr, offset, buffer, cnt, 1);
1922e192b24SSimon Glass }
1932e192b24SSimon Glass
eeprom_write(unsigned dev_addr,unsigned offset,uchar * buffer,unsigned cnt)1942e192b24SSimon Glass int eeprom_write(unsigned dev_addr, unsigned offset,
1952e192b24SSimon Glass uchar *buffer, unsigned cnt)
1962e192b24SSimon Glass {
1972e192b24SSimon Glass int ret;
1982e192b24SSimon Glass
1992e192b24SSimon Glass eeprom_write_enable(dev_addr, 1);
2002e192b24SSimon Glass
2012e192b24SSimon Glass /*
2022e192b24SSimon Glass * Write data until done or would cross a write page boundary.
2032e192b24SSimon Glass * We must write the address again when changing pages
2042e192b24SSimon Glass * because the address counter only increments within a page.
2052e192b24SSimon Glass */
2062e192b24SSimon Glass ret = eeprom_rw(dev_addr, offset, buffer, cnt, 0);
2072e192b24SSimon Glass
2082e192b24SSimon Glass eeprom_write_enable(dev_addr, 0);
2092e192b24SSimon Glass return ret;
2102e192b24SSimon Glass }
2112e192b24SSimon Glass
parse_numeric_param(char * str)212c40f0372SNikita Kiryanov static int parse_numeric_param(char *str)
213c40f0372SNikita Kiryanov {
214c40f0372SNikita Kiryanov char *endptr;
215c40f0372SNikita Kiryanov int value = simple_strtol(str, &endptr, 16);
216c40f0372SNikita Kiryanov
217c40f0372SNikita Kiryanov return (*endptr != '\0') ? -1 : value;
218c40f0372SNikita Kiryanov }
219c40f0372SNikita Kiryanov
220c40f0372SNikita Kiryanov /**
221c40f0372SNikita Kiryanov * parse_i2c_bus_addr - parse the i2c bus and i2c devaddr parameters
222c40f0372SNikita Kiryanov *
223c40f0372SNikita Kiryanov * @i2c_bus: address to store the i2c bus
224c40f0372SNikita Kiryanov * @i2c_addr: address to store the device i2c address
225c40f0372SNikita Kiryanov * @argc: count of command line arguments left to parse
226c40f0372SNikita Kiryanov * @argv: command line arguments left to parse
227c40f0372SNikita Kiryanov * @argc_no_bus_addr: argc value we expect to see when bus & addr aren't given
228c40f0372SNikita Kiryanov *
229c40f0372SNikita Kiryanov * @returns: number of arguments parsed or CMD_RET_USAGE if error
230c40f0372SNikita Kiryanov */
parse_i2c_bus_addr(int * i2c_bus,ulong * i2c_addr,int argc,char * const argv[],int argc_no_bus_addr)231c40f0372SNikita Kiryanov static int parse_i2c_bus_addr(int *i2c_bus, ulong *i2c_addr, int argc,
232c40f0372SNikita Kiryanov char * const argv[], int argc_no_bus_addr)
233c40f0372SNikita Kiryanov {
234c40f0372SNikita Kiryanov int argc_no_bus = argc_no_bus_addr + 1;
235c40f0372SNikita Kiryanov int argc_bus_addr = argc_no_bus_addr + 2;
236c40f0372SNikita Kiryanov
237c40f0372SNikita Kiryanov #ifdef CONFIG_SYS_DEF_EEPROM_ADDR
238c40f0372SNikita Kiryanov if (argc == argc_no_bus_addr) {
239c40f0372SNikita Kiryanov *i2c_bus = -1;
240c40f0372SNikita Kiryanov *i2c_addr = CONFIG_SYS_DEF_EEPROM_ADDR;
241c40f0372SNikita Kiryanov
242c40f0372SNikita Kiryanov return 0;
243c40f0372SNikita Kiryanov }
244c40f0372SNikita Kiryanov #endif
245c40f0372SNikita Kiryanov if (argc == argc_no_bus) {
246c40f0372SNikita Kiryanov *i2c_bus = -1;
247c40f0372SNikita Kiryanov *i2c_addr = parse_numeric_param(argv[0]);
248c40f0372SNikita Kiryanov
249c40f0372SNikita Kiryanov return 1;
250c40f0372SNikita Kiryanov }
251c40f0372SNikita Kiryanov
252c40f0372SNikita Kiryanov if (argc == argc_bus_addr) {
253c40f0372SNikita Kiryanov *i2c_bus = parse_numeric_param(argv[0]);
254c40f0372SNikita Kiryanov *i2c_addr = parse_numeric_param(argv[1]);
255c40f0372SNikita Kiryanov
256c40f0372SNikita Kiryanov return 2;
257c40f0372SNikita Kiryanov }
258c40f0372SNikita Kiryanov
259c40f0372SNikita Kiryanov return CMD_RET_USAGE;
260c40f0372SNikita Kiryanov }
261c40f0372SNikita Kiryanov
262aa9e6044SNikita Kiryanov #ifdef CONFIG_CMD_EEPROM_LAYOUT
263aa9e6044SNikita Kiryanov
eeprom_parse_layout_version(char * str)264aa9e6044SNikita Kiryanov __weak int eeprom_parse_layout_version(char *str)
265aa9e6044SNikita Kiryanov {
266aa9e6044SNikita Kiryanov return LAYOUT_VERSION_UNRECOGNIZED;
267aa9e6044SNikita Kiryanov }
268aa9e6044SNikita Kiryanov
269aa9e6044SNikita Kiryanov static unsigned char eeprom_buf[CONFIG_SYS_EEPROM_SIZE];
270aa9e6044SNikita Kiryanov
271e7c2729bSNikita Kiryanov #endif
272e7c2729bSNikita Kiryanov
273aa9e6044SNikita Kiryanov enum eeprom_action {
274e7c2729bSNikita Kiryanov EEPROM_READ,
275e7c2729bSNikita Kiryanov EEPROM_WRITE,
276aa9e6044SNikita Kiryanov EEPROM_PRINT,
277aa9e6044SNikita Kiryanov EEPROM_UPDATE,
278aa9e6044SNikita Kiryanov EEPROM_ACTION_INVALID,
279aa9e6044SNikita Kiryanov };
280aa9e6044SNikita Kiryanov
parse_action(char * cmd)281aa9e6044SNikita Kiryanov static enum eeprom_action parse_action(char *cmd)
282aa9e6044SNikita Kiryanov {
2833dc9be82SNikita Kiryanov if (!strncmp(cmd, "read", 4))
2843dc9be82SNikita Kiryanov return EEPROM_READ;
2853dc9be82SNikita Kiryanov if (!strncmp(cmd, "write", 5))
2863dc9be82SNikita Kiryanov return EEPROM_WRITE;
2873dc9be82SNikita Kiryanov #ifdef CONFIG_CMD_EEPROM_LAYOUT
288aa9e6044SNikita Kiryanov if (!strncmp(cmd, "print", 5))
289aa9e6044SNikita Kiryanov return EEPROM_PRINT;
290aa9e6044SNikita Kiryanov if (!strncmp(cmd, "update", 6))
291aa9e6044SNikita Kiryanov return EEPROM_UPDATE;
2923dc9be82SNikita Kiryanov #endif
293aa9e6044SNikita Kiryanov
294aa9e6044SNikita Kiryanov return EEPROM_ACTION_INVALID;
295aa9e6044SNikita Kiryanov }
296aa9e6044SNikita Kiryanov
eeprom_execute_command(enum eeprom_action action,int i2c_bus,ulong i2c_addr,int layout_ver,char * key,char * value,ulong addr,ulong off,ulong cnt)297aa9e6044SNikita Kiryanov static int eeprom_execute_command(enum eeprom_action action, int i2c_bus,
298e7c2729bSNikita Kiryanov ulong i2c_addr, int layout_ver, char *key,
299e7c2729bSNikita Kiryanov char *value, ulong addr, ulong off, ulong cnt)
300aa9e6044SNikita Kiryanov {
301e7c2729bSNikita Kiryanov int rcode = 0;
302e7c2729bSNikita Kiryanov const char *const fmt =
303e7c2729bSNikita Kiryanov "\nEEPROM @0x%lX %s: addr %08lx off %04lx count %ld ... ";
304e7c2729bSNikita Kiryanov #ifdef CONFIG_CMD_EEPROM_LAYOUT
305aa9e6044SNikita Kiryanov struct eeprom_layout layout;
306e7c2729bSNikita Kiryanov #endif
307aa9e6044SNikita Kiryanov
308aa9e6044SNikita Kiryanov if (action == EEPROM_ACTION_INVALID)
309aa9e6044SNikita Kiryanov return CMD_RET_USAGE;
310aa9e6044SNikita Kiryanov
311aa9e6044SNikita Kiryanov eeprom_init(i2c_bus);
312e7c2729bSNikita Kiryanov if (action == EEPROM_READ) {
313e7c2729bSNikita Kiryanov printf(fmt, i2c_addr, "read", addr, off, cnt);
314e7c2729bSNikita Kiryanov
315e7c2729bSNikita Kiryanov rcode = eeprom_read(i2c_addr, off, (uchar *)addr, cnt);
316e7c2729bSNikita Kiryanov
317e7c2729bSNikita Kiryanov puts("done\n");
318e7c2729bSNikita Kiryanov return rcode;
319e7c2729bSNikita Kiryanov } else if (action == EEPROM_WRITE) {
320e7c2729bSNikita Kiryanov printf(fmt, i2c_addr, "write", addr, off, cnt);
321e7c2729bSNikita Kiryanov
322e7c2729bSNikita Kiryanov rcode = eeprom_write(i2c_addr, off, (uchar *)addr, cnt);
323e7c2729bSNikita Kiryanov
324e7c2729bSNikita Kiryanov puts("done\n");
325e7c2729bSNikita Kiryanov return rcode;
326e7c2729bSNikita Kiryanov }
327e7c2729bSNikita Kiryanov
328e7c2729bSNikita Kiryanov #ifdef CONFIG_CMD_EEPROM_LAYOUT
329aa9e6044SNikita Kiryanov rcode = eeprom_read(i2c_addr, 0, eeprom_buf, CONFIG_SYS_EEPROM_SIZE);
330aa9e6044SNikita Kiryanov if (rcode < 0)
331aa9e6044SNikita Kiryanov return rcode;
332aa9e6044SNikita Kiryanov
333aa9e6044SNikita Kiryanov eeprom_layout_setup(&layout, eeprom_buf, CONFIG_SYS_EEPROM_SIZE,
334aa9e6044SNikita Kiryanov layout_ver);
335aa9e6044SNikita Kiryanov
336aa9e6044SNikita Kiryanov if (action == EEPROM_PRINT) {
337aa9e6044SNikita Kiryanov layout.print(&layout);
338aa9e6044SNikita Kiryanov return 0;
339aa9e6044SNikita Kiryanov }
340aa9e6044SNikita Kiryanov
341aa9e6044SNikita Kiryanov layout.update(&layout, key, value);
342aa9e6044SNikita Kiryanov
343aa9e6044SNikita Kiryanov rcode = eeprom_write(i2c_addr, 0, layout.data, CONFIG_SYS_EEPROM_SIZE);
344e7c2729bSNikita Kiryanov #endif
345aa9e6044SNikita Kiryanov
346aa9e6044SNikita Kiryanov return rcode;
347aa9e6044SNikita Kiryanov }
348aa9e6044SNikita Kiryanov
349aa9e6044SNikita Kiryanov #define NEXT_PARAM(argc, index) { (argc)--; (index)++; }
do_eeprom(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])3503dc9be82SNikita Kiryanov int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
351aa9e6044SNikita Kiryanov {
352aa9e6044SNikita Kiryanov int layout_ver = LAYOUT_VERSION_AUTODETECT;
353aa9e6044SNikita Kiryanov enum eeprom_action action = EEPROM_ACTION_INVALID;
3543dc9be82SNikita Kiryanov int i2c_bus = -1, index = 0;
3553dc9be82SNikita Kiryanov ulong i2c_addr = -1, addr = 0, cnt = 0, off = 0;
3563dc9be82SNikita Kiryanov int ret;
357aa9e6044SNikita Kiryanov char *field_name = "";
358aa9e6044SNikita Kiryanov char *field_value = "";
359aa9e6044SNikita Kiryanov
360aa9e6044SNikita Kiryanov if (argc <= 1)
361aa9e6044SNikita Kiryanov return CMD_RET_USAGE;
362aa9e6044SNikita Kiryanov
363aa9e6044SNikita Kiryanov NEXT_PARAM(argc, index); /* Skip program name */
364aa9e6044SNikita Kiryanov
365aa9e6044SNikita Kiryanov action = parse_action(argv[index]);
366aa9e6044SNikita Kiryanov NEXT_PARAM(argc, index);
367aa9e6044SNikita Kiryanov
3683dc9be82SNikita Kiryanov if (action == EEPROM_ACTION_INVALID)
369aa9e6044SNikita Kiryanov return CMD_RET_USAGE;
370aa9e6044SNikita Kiryanov
3713dc9be82SNikita Kiryanov #ifdef CONFIG_CMD_EEPROM_LAYOUT
3723dc9be82SNikita Kiryanov if (action == EEPROM_PRINT || action == EEPROM_UPDATE) {
373aa9e6044SNikita Kiryanov if (!strcmp(argv[index], "-l")) {
374aa9e6044SNikita Kiryanov NEXT_PARAM(argc, index);
375aa9e6044SNikita Kiryanov layout_ver = eeprom_parse_layout_version(argv[index]);
376aa9e6044SNikita Kiryanov NEXT_PARAM(argc, index);
377aa9e6044SNikita Kiryanov }
3783dc9be82SNikita Kiryanov }
3793dc9be82SNikita Kiryanov #endif
380aa9e6044SNikita Kiryanov
3813dc9be82SNikita Kiryanov switch (action) {
3823dc9be82SNikita Kiryanov case EEPROM_READ:
3833dc9be82SNikita Kiryanov case EEPROM_WRITE:
3843dc9be82SNikita Kiryanov ret = parse_i2c_bus_addr(&i2c_bus, &i2c_addr, argc,
3853dc9be82SNikita Kiryanov argv + index, 3);
3863dc9be82SNikita Kiryanov break;
3873dc9be82SNikita Kiryanov case EEPROM_PRINT:
3883dc9be82SNikita Kiryanov ret = parse_i2c_bus_addr(&i2c_bus, &i2c_addr, argc,
3893dc9be82SNikita Kiryanov argv + index, 0);
3903dc9be82SNikita Kiryanov break;
3913dc9be82SNikita Kiryanov case EEPROM_UPDATE:
3923dc9be82SNikita Kiryanov ret = parse_i2c_bus_addr(&i2c_bus, &i2c_addr, argc,
3933dc9be82SNikita Kiryanov argv + index, 2);
3943dc9be82SNikita Kiryanov break;
3953dc9be82SNikita Kiryanov default:
3963dc9be82SNikita Kiryanov /* Get compiler to stop whining */
397aa9e6044SNikita Kiryanov return CMD_RET_USAGE;
398aa9e6044SNikita Kiryanov }
399aa9e6044SNikita Kiryanov
4003dc9be82SNikita Kiryanov if (ret == CMD_RET_USAGE)
4013dc9be82SNikita Kiryanov return ret;
4023dc9be82SNikita Kiryanov
4033dc9be82SNikita Kiryanov while (ret--)
4043dc9be82SNikita Kiryanov NEXT_PARAM(argc, index);
4053dc9be82SNikita Kiryanov
4063dc9be82SNikita Kiryanov if (action == EEPROM_READ || action == EEPROM_WRITE) {
4073dc9be82SNikita Kiryanov addr = parse_numeric_param(argv[index]);
4083dc9be82SNikita Kiryanov NEXT_PARAM(argc, index);
4093dc9be82SNikita Kiryanov off = parse_numeric_param(argv[index]);
4103dc9be82SNikita Kiryanov NEXT_PARAM(argc, index);
4113dc9be82SNikita Kiryanov cnt = parse_numeric_param(argv[index]);
4123dc9be82SNikita Kiryanov }
4133dc9be82SNikita Kiryanov
4143dc9be82SNikita Kiryanov #ifdef CONFIG_CMD_EEPROM_LAYOUT
4153dc9be82SNikita Kiryanov if (action == EEPROM_UPDATE) {
4163dc9be82SNikita Kiryanov field_name = argv[index];
4173dc9be82SNikita Kiryanov NEXT_PARAM(argc, index);
418aa9e6044SNikita Kiryanov field_value = argv[index];
419aa9e6044SNikita Kiryanov NEXT_PARAM(argc, index);
420aa9e6044SNikita Kiryanov }
4213dc9be82SNikita Kiryanov #endif
422aa9e6044SNikita Kiryanov
423aa9e6044SNikita Kiryanov return eeprom_execute_command(action, i2c_bus, i2c_addr, layout_ver,
4243dc9be82SNikita Kiryanov field_name, field_value, addr, off, cnt);
4252e192b24SSimon Glass }
4262e192b24SSimon Glass
4272e192b24SSimon Glass U_BOOT_CMD(
428aa9e6044SNikita Kiryanov eeprom, 8, 1, do_eeprom,
4292e192b24SSimon Glass "EEPROM sub-system",
4302e192b24SSimon Glass "read <bus> <devaddr> addr off cnt\n"
4312e192b24SSimon Glass "eeprom write <bus> <devaddr> addr off cnt\n"
4322e192b24SSimon Glass " - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'"
433aa9e6044SNikita Kiryanov #ifdef CONFIG_CMD_EEPROM_LAYOUT
434aa9e6044SNikita Kiryanov "\n"
4353dc9be82SNikita Kiryanov "eeprom print [-l <layout_version>] <bus> <devaddr>\n"
436aa9e6044SNikita Kiryanov " - Print layout fields and their data in human readable format\n"
4373dc9be82SNikita Kiryanov "eeprom update [-l <layout_version>] <bus> <devaddr> field_name field_value\n"
438aa9e6044SNikita Kiryanov " - Update a specific eeprom field with new data.\n"
439aa9e6044SNikita Kiryanov " The new data must be written in the same human readable format as shown by the print command.\n"
440aa9e6044SNikita Kiryanov "\n"
441aa9e6044SNikita Kiryanov "LAYOUT VERSIONS\n"
442aa9e6044SNikita Kiryanov "The -l option can be used to force the command to interpret the EEPROM data using the chosen layout.\n"
443aa9e6044SNikita Kiryanov "If the -l option is omitted, the command will auto detect the layout based on the data in the EEPROM.\n"
444aa9e6044SNikita Kiryanov "The values which can be provided with the -l option are:\n"
445aa9e6044SNikita Kiryanov CONFIG_EEPROM_LAYOUT_HELP_STRING"\n"
446aa9e6044SNikita Kiryanov #endif
4472e192b24SSimon Glass )
448