#include <command.h>
#include <i2c.h>
-extern void eeprom_init (void);
-extern int eeprom_read (unsigned dev_addr, unsigned offset,
- uchar *buffer, unsigned cnt);
-extern int eeprom_write (unsigned dev_addr, unsigned offset,
- uchar *buffer, unsigned cnt);
-#if defined(CONFIG_SYS_EEPROM_WREN)
-extern int eeprom_write_enable (unsigned dev_addr, int state);
+#ifndef CONFIG_SYS_I2C_SPEED
+#define CONFIG_SYS_I2C_SPEED 50000
#endif
-
-#if defined(CONFIG_SYS_EEPROM_X40430)
- /* Maximum number of times to poll for acknowledge after write */
-#define MAX_ACKNOWLEDGE_POLLS 10
+#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 0
#endif
-/* ------------------------------------------------------------------------- */
-
-#if defined(CONFIG_CMD_EEPROM)
-static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
- const char *const fmt =
- "\nEEPROM @0x%lX %s: addr %08lx off %04lx count %ld ... ";
-
-#if defined(CONFIG_SYS_I2C_MULTI_EEPROMS)
- if (argc == 6) {
- ulong dev_addr = simple_strtoul (argv[2], NULL, 16);
- ulong addr = simple_strtoul (argv[3], NULL, 16);
- ulong off = simple_strtoul (argv[4], NULL, 16);
- ulong cnt = simple_strtoul (argv[5], NULL, 16);
-#else
- if (argc == 5) {
- ulong dev_addr = CONFIG_SYS_DEF_EEPROM_ADDR;
- ulong addr = simple_strtoul (argv[2], NULL, 16);
- ulong off = simple_strtoul (argv[3], NULL, 16);
- ulong cnt = simple_strtoul (argv[4], NULL, 16);
-#endif /* CONFIG_SYS_I2C_MULTI_EEPROMS */
-
-# if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
- eeprom_init ();
-# endif /* !CONFIG_SPI */
-
- if (strcmp (argv[1], "read") == 0) {
- int rcode;
-
- printf (fmt, dev_addr, argv[1], addr, off, cnt);
-
- rcode = eeprom_read (dev_addr, off, (uchar *) addr, cnt);
-
- puts ("done\n");
- return rcode;
- } else if (strcmp (argv[1], "write") == 0) {
- int rcode;
-
- printf (fmt, dev_addr, argv[1], addr, off, cnt);
-
- rcode = eeprom_write (dev_addr, off, (uchar *) addr, cnt);
-
- puts ("done\n");
- return rcode;
- }
- }
-
- return CMD_RET_USAGE;
-}
+#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_BITS
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 8
#endif
-/*-----------------------------------------------------------------------
- *
+#define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)
+#define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1))
+
+/*
* for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is
* 0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM.
*
* for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is
* 0x00000nxx for EEPROM address selectors and page number at n.
*/
-
#if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
-#if !defined(CONFIG_SYS_I2C_EEPROM_ADDR_LEN) || CONFIG_SYS_I2C_EEPROM_ADDR_LEN < 1 || CONFIG_SYS_I2C_EEPROM_ADDR_LEN > 2
+#if !defined(CONFIG_SYS_I2C_EEPROM_ADDR_LEN) || \
+ (CONFIG_SYS_I2C_EEPROM_ADDR_LEN < 1) || \
+ (CONFIG_SYS_I2C_EEPROM_ADDR_LEN > 2)
#error CONFIG_SYS_I2C_EEPROM_ADDR_LEN must be 1 or 2
#endif
#endif
-int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
+__weak int eeprom_write_enable(unsigned dev_addr, int state)
{
- unsigned end = offset + cnt;
- unsigned blk_off;
- int rcode = 0;
+ return 0;
+}
- /* Read data until done or would cross a page boundary.
- * We must write the address again when changing pages
- * because the next page may be in a different device.
- */
- while (offset < end) {
- unsigned alen, len;
-#if !defined(CONFIG_SYS_I2C_FRAM)
- unsigned maxlen;
+void eeprom_init(int bus)
+{
+ /* SPI EEPROM */
+#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
+ spi_init_f();
#endif
-#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X)
- uchar addr[2];
+ /* I2C EEPROM */
+#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT)
+#if defined(CONFIG_SYS_I2C)
+ if (bus >= 0)
+ i2c_set_bus_num(bus);
+#endif
+ i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#endif
+}
- blk_off = offset & 0xFF; /* block offset */
+static int eeprom_addr(unsigned dev_addr, unsigned offset, uchar *addr)
+{
+ unsigned blk_off;
+ int alen;
- addr[0] = offset >> 8; /* block number */
- addr[1] = blk_off; /* block offset */
- alen = 2;
+ blk_off = offset & 0xff; /* block offset */
+#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1
+ addr[0] = offset >> 8; /* block number */
+ addr[1] = blk_off; /* block offset */
+ alen = 2;
#else
- uchar addr[3];
+ addr[0] = offset >> 16; /* block number */
+ addr[1] = offset >> 8; /* upper address octet */
+ addr[2] = blk_off; /* lower address octet */
+ alen = 3;
+#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN */
- blk_off = offset & 0xFF; /* block offset */
+ addr[0] |= dev_addr; /* insert device address */
- addr[0] = offset >> 16; /* block number */
- addr[1] = offset >> 8; /* upper address octet */
- addr[2] = blk_off; /* lower address octet */
- alen = 3;
-#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */
-
- addr[0] |= dev_addr; /* insert device address */
+ return alen;
+}
- len = end - offset;
+static int eeprom_len(unsigned offset, unsigned end)
+{
+ unsigned len = end - offset;
- /*
- * For a FRAM device there is no limit on the number of the
- * bytes that can be ccessed with the single read or write
- * operation.
- */
+ /*
+ * For a FRAM device there is no limit on the number of the
+ * bytes that can be ccessed with the single read or write
+ * operation.
+ */
#if !defined(CONFIG_SYS_I2C_FRAM)
- maxlen = 0x100 - blk_off;
- if (maxlen > I2C_RXTX_LEN)
- maxlen = I2C_RXTX_LEN;
- if (len > maxlen)
- len = maxlen;
-#endif
+ unsigned blk_off = offset & 0xff;
+ unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
-#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
- spi_read (addr, alen, buffer, len);
-#else
- if (i2c_read(addr[0], offset, alen - 1, buffer, len))
- rcode = 1;
+ if (maxlen > I2C_RXTX_LEN)
+ maxlen = I2C_RXTX_LEN;
+
+ if (len > maxlen)
+ len = maxlen;
#endif
- buffer += len;
- offset += len;
- }
- return rcode;
+ return len;
}
-/*-----------------------------------------------------------------------
- *
- * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is
- * 0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM.
- *
- * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is
- * 0x00000nxx for EEPROM address selectors and page number at n.
- */
-
-int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
+static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
+ uchar *buffer, unsigned len, bool read)
{
- unsigned end = offset + cnt;
- unsigned blk_off;
- int rcode = 0;
+ int ret = 0;
-#if defined(CONFIG_SYS_EEPROM_X40430)
- uchar contr_r_addr[2];
- uchar addr_void[2];
- uchar contr_reg[2];
- uchar ctrl_reg_v;
- int i;
+ /* SPI */
+#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
+ if (read)
+ spi_read(addr, alen, buffer, len);
+ else
+ spi_write(addr, alen, buffer, len);
+#else /* I2C */
+
+#if defined(CONFIG_SYS_I2C_EEPROM_BUS)
+ i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
#endif
-#if defined(CONFIG_SYS_EEPROM_WREN)
- eeprom_write_enable (dev_addr,1);
-#endif
- /* Write data until done or would cross a write page boundary.
- * We must write the address again when changing pages
- * because the address counter only increments within a page.
- */
+ if (read)
+ ret = i2c_read(addr[0], offset, alen - 1, buffer, len);
+ else
+ ret = i2c_write(addr[0], offset, alen - 1, buffer, len);
- while (offset < end) {
- unsigned alen, len;
-#if !defined(CONFIG_SYS_I2C_FRAM)
- unsigned maxlen;
+ if (ret)
+ ret = 1;
#endif
+ return ret;
+}
-#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X)
- uchar addr[2];
-
- blk_off = offset & 0xFF; /* block offset */
-
- addr[0] = offset >> 8; /* block number */
- addr[1] = blk_off; /* block offset */
- alen = 2;
-#else
- uchar addr[3];
-
- blk_off = offset & 0xFF; /* block offset */
-
- addr[0] = offset >> 16; /* block number */
- addr[1] = offset >> 8; /* upper address octet */
- addr[2] = blk_off; /* lower address octet */
- alen = 3;
-#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */
-
- addr[0] |= dev_addr; /* insert device address */
-
- len = end - offset;
-
- /*
- * For a FRAM device there is no limit on the number of the
- * bytes that can be accessed with the single read or write
- * operation.
- */
-#if !defined(CONFIG_SYS_I2C_FRAM)
-
-#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)
-
-#define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)
-#define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1))
+static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer,
+ unsigned cnt, bool read)
+{
+ unsigned end = offset + cnt;
+ unsigned alen, len;
+ int rcode = 0;
+ uchar addr[3];
- maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
-#else
- maxlen = 0x100 - blk_off;
-#endif
- if (maxlen > I2C_RXTX_LEN)
- maxlen = I2C_RXTX_LEN;
+ while (offset < end) {
+ alen = eeprom_addr(dev_addr, offset, addr);
- if (len > maxlen)
- len = maxlen;
-#endif
+ len = eeprom_len(offset, end);
-#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
- spi_write (addr, alen, buffer, len);
-#else
-#if defined(CONFIG_SYS_EEPROM_X40430)
- /* Get the value of the control register.
- * Set current address (internal pointer in the x40430)
- * to 0x1ff.
- */
- contr_r_addr[0] = 9;
- contr_r_addr[1] = 0xff;
- addr_void[0] = 0;
- addr_void[1] = addr[1];
-#ifdef CONFIG_SYS_I2C_EEPROM_ADDR
- contr_r_addr[0] |= CONFIG_SYS_I2C_EEPROM_ADDR;
- addr_void[0] |= CONFIG_SYS_I2C_EEPROM_ADDR;
-#endif
- contr_reg[0] = 0xff;
- if (i2c_read (contr_r_addr[0], contr_r_addr[1], 1, contr_reg, 1) != 0) {
- rcode = 1;
- }
- ctrl_reg_v = contr_reg[0];
-
- /* Are any of the eeprom blocks write protected?
- */
- if (ctrl_reg_v & 0x18) {
- ctrl_reg_v &= ~0x18; /* reset block protect bits */
- ctrl_reg_v |= 0x02; /* set write enable latch */
- ctrl_reg_v &= ~0x04; /* clear RWEL */
-
- /* Set write enable latch.
- */
- contr_reg[0] = 0x02;
- if (i2c_write (contr_r_addr[0], 0xff, 1, contr_reg, 1) != 0) {
- rcode = 1;
- }
-
- /* Set register write enable latch.
- */
- contr_reg[0] = 0x06;
- if (i2c_write (contr_r_addr[0], 0xFF, 1, contr_reg, 1) != 0) {
- rcode = 1;
- }
-
- /* Modify ctrl register.
- */
- contr_reg[0] = ctrl_reg_v;
- if (i2c_write (contr_r_addr[0], 0xFF, 1, contr_reg, 1) != 0) {
- rcode = 1;
- }
-
- /* The write (above) is an operation on NV memory.
- * These can take some time (~5ms), and the device
- * will not respond to further I2C messages till
- * it's completed the write.
- * So poll device for an I2C acknowledge.
- * When we get one we know we can continue with other
- * operations.
- */
- contr_reg[0] = 0;
- for (i = 0; i < MAX_ACKNOWLEDGE_POLLS; i++) {
- if (i2c_read (addr_void[0], addr_void[1], 1, contr_reg, 1) == 0)
- break; /* got ack */
-#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS)
- udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
-#endif
- }
- if (i == MAX_ACKNOWLEDGE_POLLS) {
- puts ("EEPROM poll acknowledge failed\n");
- rcode = 1;
- }
- }
-
- /* Is the write enable latch on?.
- */
- else if (!(ctrl_reg_v & 0x02)) {
- /* Set write enable latch.
- */
- contr_reg[0] = 0x02;
- if (i2c_write (contr_r_addr[0], 0xFF, 1, contr_reg, 1) != 0) {
- rcode = 1;
- }
- }
- /* Write is enabled ... now write eeprom value.
- */
-#endif
- if (i2c_write(addr[0], offset, alen - 1, buffer, len))
- rcode = 1;
+ rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read);
-#endif
buffer += len;
offset += len;
-#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS)
- udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
-#endif
+ if (!read)
+ udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
}
-#if defined(CONFIG_SYS_EEPROM_WREN)
- eeprom_write_enable (dev_addr,0);
-#endif
+
return rcode;
}
-#if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
-int
-eeprom_probe (unsigned dev_addr, unsigned offset)
+int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
{
- unsigned char chip;
-
- /* Probe the chip address
+ /*
+ * Read data until done or would cross a page boundary.
+ * We must write the address again when changing pages
+ * because the next page may be in a different device.
*/
-#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X)
- chip = offset >> 8; /* block number */
-#else
- chip = offset >> 16; /* block number */
-#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */
+ return eeprom_rw(dev_addr, offset, buffer, cnt, 1);
+}
+
+int eeprom_write(unsigned dev_addr, unsigned offset,
+ uchar *buffer, unsigned cnt)
+{
+ int ret;
- chip |= dev_addr; /* insert device address */
+ eeprom_write_enable(dev_addr, 1);
+
+ /*
+ * Write data until done or would cross a write page boundary.
+ * We must write the address again when changing pages
+ * because the address counter only increments within a page.
+ */
+ ret = eeprom_rw(dev_addr, offset, buffer, cnt, 0);
- return (i2c_probe (chip));
+ eeprom_write_enable(dev_addr, 0);
+ return ret;
}
-#endif
-/*-----------------------------------------------------------------------
- * Set default values
- */
-#ifndef CONFIG_SYS_I2C_SPEED
-#define CONFIG_SYS_I2C_SPEED 50000
+static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ const char *const fmt =
+ "\nEEPROM @0x%lX %s: addr %08lx off %04lx count %ld ... ";
+ char * const *args = &argv[2];
+ int rcode;
+ ulong dev_addr, addr, off, cnt;
+ int bus_addr;
+
+ switch (argc) {
+#ifdef CONFIG_SYS_DEF_EEPROM_ADDR
+ case 5:
+ bus_addr = -1;
+ dev_addr = CONFIG_SYS_DEF_EEPROM_ADDR;
+ break;
#endif
+ case 6:
+ bus_addr = -1;
+ dev_addr = simple_strtoul(*args++, NULL, 16);
+ break;
+ case 7:
+ bus_addr = simple_strtoul(*args++, NULL, 16);
+ dev_addr = simple_strtoul(*args++, NULL, 16);
+ break;
+ default:
+ return CMD_RET_USAGE;
+ }
-void eeprom_init (void)
-{
+ addr = simple_strtoul(*args++, NULL, 16);
+ off = simple_strtoul(*args++, NULL, 16);
+ cnt = simple_strtoul(*args++, NULL, 16);
-#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
- spi_init_f ();
-#endif
-#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT)
- i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
-#endif
-}
+ eeprom_init(bus_addr);
-/*-----------------------------------------------------------------------
- */
+ if (strcmp(argv[1], "read") == 0) {
+ printf(fmt, dev_addr, argv[1], addr, off, cnt);
+
+ rcode = eeprom_read(dev_addr, off, (uchar *)addr, cnt);
+
+ puts("done\n");
+ return rcode;
+ } else if (strcmp(argv[1], "write") == 0) {
+ printf(fmt, dev_addr, argv[1], addr, off, cnt);
-/***************************************************/
+ rcode = eeprom_write(dev_addr, off, (uchar *)addr, cnt);
-#if defined(CONFIG_CMD_EEPROM)
+ puts("done\n");
+ return rcode;
+ }
+
+ return CMD_RET_USAGE;
+}
-#ifdef CONFIG_SYS_I2C_MULTI_EEPROMS
U_BOOT_CMD(
- eeprom, 6, 1, do_eeprom,
+ eeprom, 7, 1, do_eeprom,
"EEPROM sub-system",
- "read devaddr addr off cnt\n"
- "eeprom write devaddr addr off cnt\n"
+ "read <bus> <devaddr> addr off cnt\n"
+ "eeprom write <bus> <devaddr> addr off cnt\n"
" - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'"
)
-#else /* One EEPROM */
-U_BOOT_CMD(
- eeprom, 5, 1, do_eeprom,
- "EEPROM sub-system",
- "read addr off cnt\n"
- "eeprom write addr off cnt\n"
- " - read/write `cnt' bytes at EEPROM offset `off'"
-)
-#endif /* CONFIG_SYS_I2C_MULTI_EEPROMS */
-
-#endif
projects / people / ms / u-boot.git / blobdiff