Remove the cmd_ prefix from command files

Now that they are in their own directory, we can remove this prefix.
This makes it easier to find a file since the prefix does not get in the
way.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>

1 files changed, 265 insertions, 0 deletions

diff --git a/cmd/eeprom.c b/cmd/eeprom.c
new file mode 100644
index 0000000..571240a
--- /dev/null
+++ b/cmd/eeprom.c
@@ -0,0 +1,265 @@
+/*
+ * (C) Copyright 2000, 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Support for read and write access to EEPROM like memory devices. This
+ * includes regular EEPROM as well as  FRAM (ferroelectic nonvolaile RAM).
+ * FRAM devices read and write data at bus speed. In particular, there is no
+ * write delay. Also, there is no limit imposed on the number of bytes that can
+ * be transferred with a single read or write.
+ *
+ * Use the following configuration options to ensure no unneeded performance
+ * degradation (typical for EEPROM) is incured for FRAM memory:
+ *
+ * #define CONFIG_SYS_I2C_FRAM
+ * #undef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
+ *
+ */
+
+#include <common.h>
+#include <config.h>
+#include <command.h>
+#include <i2c.h>
+
+#ifndef	CONFIG_SYS_I2C_SPEED
+#define	CONFIG_SYS_I2C_SPEED	50000
+#endif
+
+#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS	0
+#endif
+
+#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)
+#error CONFIG_SYS_I2C_EEPROM_ADDR_LEN must be 1 or 2
+#endif
+#endif
+
+__weak int eeprom_write_enable(unsigned dev_addr, int state)
+{
+	return 0;
+}
+
+void eeprom_init(int bus)
+{
+	/* SPI EEPROM */
+#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
+	spi_init_f();
+#endif
+
+	/* 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
+}
+
+static int eeprom_addr(unsigned dev_addr, unsigned offset, uchar *addr)
+{
+	unsigned blk_off;
+	int alen;
+
+	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
+	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 */
+
+	addr[0] |= dev_addr;		/* insert device address */
+
+	return alen;
+}
+
+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.
+	 */
+#if !defined(CONFIG_SYS_I2C_FRAM)
+	unsigned blk_off = offset & 0xff;
+	unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off);
+
+	if (maxlen > I2C_RXTX_LEN)
+		maxlen = I2C_RXTX_LEN;
+
+	if (len > maxlen)
+		len = maxlen;
+#endif
+
+	return len;
+}
+
+static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
+			   uchar *buffer, unsigned len, bool read)
+{
+	int ret = 0;
+
+	/* 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 (read)
+		ret = i2c_read(addr[0], offset, alen - 1, buffer, len);
+	else
+		ret = i2c_write(addr[0], offset, alen - 1, buffer, len);
+
+	if (ret)
+		ret = 1;
+#endif
+	return ret;
+}
+
+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];
+
+	while (offset < end) {
+		alen = eeprom_addr(dev_addr, offset, addr);
+
+		len = eeprom_len(offset, end);
+
+		rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read);
+
+		buffer += len;
+		offset += len;
+
+		if (!read)
+			udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
+	}
+
+	return rcode;
+}
+
+int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt)
+{
+	/*
+	 * 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.
+	 */
+	return eeprom_rw(dev_addr, offset, buffer, cnt, 1);
+}
+
+int eeprom_write(unsigned dev_addr, unsigned offset,
+		 uchar *buffer, unsigned cnt)
+{
+	int ret;
+
+	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);
+
+	eeprom_write_enable(dev_addr, 0);
+	return ret;
+}
+
+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;
+	}
+
+	addr = simple_strtoul(*args++, NULL, 16);
+	off = simple_strtoul(*args++, NULL, 16);
+	cnt = simple_strtoul(*args++, NULL, 16);
+
+	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);
+
+		puts("done\n");
+		return rcode;
+	}
+
+	return CMD_RET_USAGE;
+}
+
+U_BOOT_CMD(
+	eeprom,	7,	1,	do_eeprom,
+	"EEPROM sub-system",
+	"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'"
+)