[TG3]: add tg3_set_eeprom()

- Add nvram size detection
- Add appropriate byte swapping to tg3_get_eeprom so that the same byte
stream is read in all systems
- Fix tg3_get_eeprom to read both eeprom and flash
- Add tg3_set_eeprom to write eeprom and flash
- Change tg3_nvram_init to detect all supported nvram devices
- Change tg3_nvram_read to properly detect Atmel flash that requires
address translation
- Increase nvram polling delay to account for slower eeprom devices
- Remove some of the flushing read that is not required for the
production 5750 devices
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.c

@@ -6378,11 +6378,13 @@ do {	p = (u32 *)(orig_p + (reg));		\
 
 static int tg3_get_eeprom_len(struct net_device *dev)
 {
-	return EEPROM_CHIP_SIZE;
+	struct tg3 *tp = netdev_priv(dev);
+
+	return tp->nvram_size;
 }
 
-static int tg3_nvram_read_using_eeprom(struct tg3 *tp,
-					u32 offset, u32 *val);
+static int tg3_nvram_read(struct tg3 *tp, u32 offset, u32 *val);
+
 static int tg3_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
 {
 	struct tg3 *tp = netdev_priv(dev);
@@ -6394,10 +6396,7 @@ static int tg3_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
 	len = eeprom->len;
 	eeprom->len = 0;
 
-	ret = tg3_nvram_read_using_eeprom(tp, 0, &eeprom->magic);
-	if (ret)
-		return ret;
-	eeprom->magic = swab32(eeprom->magic);
+	eeprom->magic = TG3_EEPROM_MAGIC;
 
 	if (offset & 3) {
 		/* adjustments to start on required 4 byte boundary */
@@ -6407,9 +6406,10 @@ static int tg3_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
 			/* i.e. offset=1 len=2 */
 			b_count = len;
 		}
-		ret = tg3_nvram_read_using_eeprom(tp, offset-b_offset, &val);
+		ret = tg3_nvram_read(tp, offset-b_offset, &val);
 		if (ret)
 			return ret;
+		val = cpu_to_le32(val);
 		memcpy(data, ((char*)&val) + b_offset, b_count);
 		len -= b_count;
 		offset += b_count;
@@ -6419,12 +6419,13 @@ static int tg3_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
 	/* read bytes upto the last 4 byte boundary */
 	pd = &data[eeprom->len];
 	for (i = 0; i < (len - (len & 3)); i += 4) {
-		ret = tg3_nvram_read_using_eeprom(tp, offset + i, 
-				(u32*)(pd + i));
+		ret = tg3_nvram_read(tp, offset + i, &val);
 		if (ret) {
 			eeprom->len += i;
 			return ret;
 		}
+		val = cpu_to_le32(val);
+		memcpy(pd + i, &val, 4);
 	}
 	eeprom->len += i;
 
@@ -6433,15 +6434,72 @@ static int tg3_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
 		pd = &data[eeprom->len];
 		b_count = len & 3;
 		b_offset = offset + len - b_count;
-		ret = tg3_nvram_read_using_eeprom(tp, b_offset, &val);
+		ret = tg3_nvram_read(tp, b_offset, &val);
 		if (ret)
 			return ret;
+		val = cpu_to_le32(val);
 		memcpy(pd, ((char*)&val), b_count);
 		eeprom->len += b_count;
 	}
 	return 0;
 }
 
+static int tg3_nvram_write_block(struct tg3 *tp, u32 offset, u32 len, u8 *buf); 
+
+static int tg3_set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
+{
+	struct tg3 *tp = netdev_priv(dev);
+	int ret;
+	u32 offset, len, b_offset, odd_len, start, end;
+	u8 *buf;
+
+	if (eeprom->magic != TG3_EEPROM_MAGIC)
+		return -EINVAL;
+
+	offset = eeprom->offset;
+	len = eeprom->len;
+
+	if ((b_offset = (offset & 3))) {
+		/* adjustments to start on required 4 byte boundary */
+		ret = tg3_nvram_read(tp, offset-b_offset, &start);
+		if (ret)
+			return ret;
+		start = cpu_to_le32(start);
+		len += b_offset;
+		offset &= ~3;
+	}
+
+	odd_len = 0;
+	if ((len & 3) && ((len > 4) || (b_offset == 0))) {
+		/* adjustments to end on required 4 byte boundary */
+		odd_len = 1;
+		len = (len + 3) & ~3;
+		ret = tg3_nvram_read(tp, offset+len-4, &end);
+		if (ret)
+			return ret;
+		end = cpu_to_le32(end);
+	}
+
+	buf = data;
+	if (b_offset || odd_len) {
+		buf = kmalloc(len, GFP_KERNEL);
+		if (buf == 0)
+			return -ENOMEM;
+		if (b_offset)
+			memcpy(buf, &start, 4);
+		if (odd_len)
+			memcpy(buf+len-4, &end, 4);
+		memcpy(buf + b_offset, data, eeprom->len);
+	}
+
+	ret = tg3_nvram_write_block(tp, offset, len, buf);
+
+	if (buf != data)
+		kfree(buf);
+
+	return ret;
+}
+
 static int tg3_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
   	struct tg3 *tp = netdev_priv(dev);
@@ -6841,6 +6899,7 @@ static struct ethtool_ops tg3_ethtool_ops = {
 	.get_link		= ethtool_op_get_link,
 	.get_eeprom_len		= tg3_get_eeprom_len,
 	.get_eeprom		= tg3_get_eeprom,
+	.set_eeprom		= tg3_set_eeprom,
 	.get_ringparam		= tg3_get_ringparam,
 	.set_ringparam		= tg3_set_ringparam,
 	.get_pauseparam		= tg3_get_pauseparam,
@@ -6860,6 +6919,103 @@ static struct ethtool_ops tg3_ethtool_ops = {
 	.get_ethtool_stats	= tg3_get_ethtool_stats,
 };
 
+static void __devinit tg3_get_eeprom_size(struct tg3 *tp)
+{
+	u32 cursize, val;
+
+	tp->nvram_size = EEPROM_CHIP_SIZE;
+
+	if (tg3_nvram_read(tp, 0, &val) != 0)
+		return;
+
+	if (swab32(val) != TG3_EEPROM_MAGIC)
+		return;
+
+	/*
+	 * Size the chip by reading offsets at increasing powers of two.
+	 * When we encounter our validation signature, we know the addressing
+	 * has wrapped around, and thus have our chip size.
+	 */
+	cursize = 0x800;
+
+	while (cursize < tp->nvram_size) {
+		if (tg3_nvram_read(tp, cursize, &val) != 0)
+			return;
+
+		if (swab32(val) == TG3_EEPROM_MAGIC)
+			break;
+
+		cursize <<= 1;
+	}
+
+	tp->nvram_size = cursize;
+}
+		
+static void __devinit tg3_get_nvram_size(struct tg3 *tp)
+{
+	u32 val;
+
+	if (tg3_nvram_read(tp, 0xf0, &val) == 0) {
+		if (val != 0) {
+			tp->nvram_size = (val >> 16) * 1024;
+			return;
+		}
+	}
+	tp->nvram_size = 0x20000;
+}
+
+static void __devinit tg3_get_nvram_info(struct tg3 *tp)
+{
+	u32 nvcfg1;
+
+	nvcfg1 = tr32(NVRAM_CFG1);
+	if (nvcfg1 & NVRAM_CFG1_FLASHIF_ENAB) {
+		tp->tg3_flags2 |= TG3_FLG2_FLASH;
+	}
+	else {
+		nvcfg1 &= ~NVRAM_CFG1_COMPAT_BYPASS;
+		tw32(NVRAM_CFG1, nvcfg1);
+	}
+
+	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750) {
+		switch (nvcfg1 & NVRAM_CFG1_VENDOR_MASK) {
+			case FLASH_VENDOR_ATMEL_FLASH_BUFFERED:
+				tp->nvram_jedecnum = JEDEC_ATMEL;
+				tp->nvram_pagesize = ATMEL_AT45DB0X1B_PAGE_SIZE;
+				tp->tg3_flags |= TG3_FLAG_NVRAM_BUFFERED;
+				break;
+			case FLASH_VENDOR_ATMEL_FLASH_UNBUFFERED:
+				tp->nvram_jedecnum = JEDEC_ATMEL;
+                         	tp->nvram_pagesize = ATMEL_AT25F512_PAGE_SIZE;
+				break;
+			case FLASH_VENDOR_ATMEL_EEPROM:
+				tp->nvram_jedecnum = JEDEC_ATMEL;
+                         	tp->nvram_pagesize = ATMEL_AT24C512_CHIP_SIZE;
+				tp->tg3_flags |= TG3_FLAG_NVRAM_BUFFERED;
+				break;
+			case FLASH_VENDOR_ST:
+				tp->nvram_jedecnum = JEDEC_ST;
+				tp->nvram_pagesize = ST_M45PEX0_PAGE_SIZE;
+				tp->tg3_flags |= TG3_FLAG_NVRAM_BUFFERED;
+				break;
+			case FLASH_VENDOR_SAIFUN:
+				tp->nvram_jedecnum = JEDEC_SAIFUN;
+				tp->nvram_pagesize = SAIFUN_SA25F0XX_PAGE_SIZE;
+				break;
+			case FLASH_VENDOR_SST_SMALL:
+			case FLASH_VENDOR_SST_LARGE:
+				tp->nvram_jedecnum = JEDEC_SST;
+				tp->nvram_pagesize = SST_25VF0X0_PAGE_SIZE;
+				break;
+		}
+	}
+	else {
+		tp->nvram_jedecnum = JEDEC_ATMEL;
+		tp->nvram_pagesize = ATMEL_AT45DB0X1B_PAGE_SIZE;
+		tp->tg3_flags |= TG3_FLAG_NVRAM_BUFFERED;
+	}
+}
+
 /* Chips other than 5700/5701 use the NVRAM for fetching info. */
 static void __devinit tg3_nvram_init(struct tg3 *tp)
 {
@@ -6884,32 +7040,27 @@ static void __devinit tg3_nvram_init(struct tg3 *tp)
 
 	if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5700 &&
 	    GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5701) {
-		u32 nvcfg1;
+		tp->tg3_flags |= TG3_FLAG_NVRAM;
 
 		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750) {
 			u32 nvaccess = tr32(NVRAM_ACCESS);
 
-			tw32_f(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);
+			tw32(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);
 		}
 
-		nvcfg1 = tr32(NVRAM_CFG1);
-
-		tp->tg3_flags |= TG3_FLAG_NVRAM;
-		if (nvcfg1 & NVRAM_CFG1_FLASHIF_ENAB) {
-			if (nvcfg1 & NVRAM_CFG1_BUFFERED_MODE)
-				tp->tg3_flags |= TG3_FLAG_NVRAM_BUFFERED;
-		} else {
-			nvcfg1 &= ~NVRAM_CFG1_COMPAT_BYPASS;
-			tw32(NVRAM_CFG1, nvcfg1);
-		}
+		tg3_get_nvram_info(tp);
+		tg3_get_nvram_size(tp);
 
 		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750) {
 			u32 nvaccess = tr32(NVRAM_ACCESS);
 
-			tw32_f(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);
+			tw32(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);
 		}
+
 	} else {
 		tp->tg3_flags &= ~(TG3_FLAG_NVRAM | TG3_FLAG_NVRAM_BUFFERED);
+
+		tg3_get_eeprom_size(tp);
 	}
 }
 
@@ -6947,11 +7098,30 @@ static int tg3_nvram_read_using_eeprom(struct tg3 *tp,
 	return 0;
 }
 
-static int __devinit tg3_nvram_read(struct tg3 *tp,
-				    u32 offset, u32 *val)
+#define NVRAM_CMD_TIMEOUT 10000
+
+static int tg3_nvram_exec_cmd(struct tg3 *tp, u32 nvram_cmd)
 {
 	int i;
 
+	tw32(NVRAM_CMD, nvram_cmd);
+	for (i = 0; i < NVRAM_CMD_TIMEOUT; i++) {
+		udelay(10);
+		if (tr32(NVRAM_CMD) & NVRAM_CMD_DONE) {
+			udelay(10);
+			break;
+		}
+	}
+	if (i == NVRAM_CMD_TIMEOUT) {
+		return -EBUSY;
+	}
+	return 0;
+}
+
+static int tg3_nvram_read(struct tg3 *tp, u32 offset, u32 *val)
+{
+	int ret;
+
 	if (tp->tg3_flags2 & TG3_FLG2_SUN_570X) {
 		printk(KERN_ERR PFX "Attempt to do nvram_read on Sun 570X\n");
 		return -EINVAL;
@@ -6960,10 +7130,14 @@ static int __devinit tg3_nvram_read(struct tg3 *tp,
 	if (!(tp->tg3_flags & TG3_FLAG_NVRAM))
 		return tg3_nvram_read_using_eeprom(tp, offset, val);
 
-	if (tp->tg3_flags & TG3_FLAG_NVRAM_BUFFERED)
-		offset = ((offset / NVRAM_BUFFERED_PAGE_SIZE) <<
-			  NVRAM_BUFFERED_PAGE_POS) +
-			(offset % NVRAM_BUFFERED_PAGE_SIZE);
+	if ((tp->tg3_flags & TG3_FLAG_NVRAM_BUFFERED) &&
+		(tp->tg3_flags2 & TG3_FLG2_FLASH) &&
+		(tp->nvram_jedecnum == JEDEC_ATMEL)) {
+
+		offset = ((offset / tp->nvram_pagesize) <<
+			  ATMEL_AT45DB0X1B_PAGE_POS) +
+			(offset % tp->nvram_pagesize);
+	}
 
 	if (offset > NVRAM_ADDR_MSK)
 		return -EINVAL;
@@ -6977,32 +7151,282 @@ static int __devinit tg3_nvram_read(struct tg3 *tp,
 	}
 
 	tw32(NVRAM_ADDR, offset);
-	tw32(NVRAM_CMD,
-	     NVRAM_CMD_RD | NVRAM_CMD_GO |
+	ret = tg3_nvram_exec_cmd(tp, NVRAM_CMD_RD | NVRAM_CMD_GO |
 		NVRAM_CMD_FIRST | NVRAM_CMD_LAST | NVRAM_CMD_DONE);
 
-	/* Wait for done bit to clear. */
-	for (i = 0; i < 1000; i++) {
-		udelay(10);
-		if (tr32(NVRAM_CMD) & NVRAM_CMD_DONE) {
-			udelay(10);
+	if (ret == 0)
 		*val = swab32(tr32(NVRAM_RDDATA));
+
+	tg3_nvram_unlock(tp);
+
+	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750) {
+		u32 nvaccess = tr32(NVRAM_ACCESS);
+
+		tw32_f(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);
+	}
+
+	return ret;
+}
+
+static int tg3_nvram_write_block_using_eeprom(struct tg3 *tp,
+				    u32 offset, u32 len, u8 *buf)
+{
+	int i, j, rc = 0;
+	u32 val;
+
+	for (i = 0; i < len; i += 4) {
+		u32 addr, data;
+
+		addr = offset + i;
+
+		memcpy(&data, buf + i, 4);
+
+		tw32(GRC_EEPROM_DATA, cpu_to_le32(data));
+
+		val = tr32(GRC_EEPROM_ADDR);
+		tw32(GRC_EEPROM_ADDR, val | EEPROM_ADDR_COMPLETE);
+
+		val &= ~(EEPROM_ADDR_ADDR_MASK | EEPROM_ADDR_DEVID_MASK |
+			EEPROM_ADDR_READ);
+		tw32(GRC_EEPROM_ADDR, val |
+			(0 << EEPROM_ADDR_DEVID_SHIFT) |
+			(addr & EEPROM_ADDR_ADDR_MASK) |
+			EEPROM_ADDR_START |
+			EEPROM_ADDR_WRITE);
+		
+		for (j = 0; j < 10000; j++) {
+			val = tr32(GRC_EEPROM_ADDR);
+
+			if (val & EEPROM_ADDR_COMPLETE)
+				break;
+			udelay(100);
+		}
+		if (!(val & EEPROM_ADDR_COMPLETE)) {
+			rc = -EBUSY;
 			break;
 		}
 	}
 
-	tg3_nvram_unlock(tp);
+	return rc;
+}
+
+/* offset and length are dword aligned */
+static int tg3_nvram_write_block_unbuffered(struct tg3 *tp, u32 offset, u32 len,
+		u8 *buf)
+{
+	int ret = 0;
+	u32 pagesize = tp->nvram_pagesize;
+	u32 pagemask = pagesize - 1;
+	u32 nvram_cmd;
+	u8 *tmp;
+
+	tmp = kmalloc(pagesize, GFP_KERNEL);
+	if (tmp == NULL)
+		return -ENOMEM;
+
+	while (len) {
+		int j;
+		u32 phy_addr, page_off, size, nvaccess;
+
+		phy_addr = offset & ~pagemask;
+	
+		for (j = 0; j < pagesize; j += 4) {
+			if ((ret = tg3_nvram_read(tp, phy_addr + j,
+						(u32 *) (tmp + j))))
+				break;
+		}
+		if (ret)
+			break;
+
+	        page_off = offset & pagemask;
+		size = pagesize;
+		if (len < size)
+			size = len;
+
+		len -= size;
+
+		memcpy(tmp + page_off, buf, size);
+
+		offset = offset + (pagesize - page_off);
+
+		nvaccess = tr32(NVRAM_ACCESS);
+		tw32_f(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);
+
+		/*
+		 * Before we can erase the flash page, we need
+		 * to issue a special "write enable" command.
+		 */
+		nvram_cmd = NVRAM_CMD_WREN | NVRAM_CMD_GO | NVRAM_CMD_DONE;
+
+		if (tg3_nvram_exec_cmd(tp, nvram_cmd))
+			break;
+
+		/* Erase the target page */
+		tw32(NVRAM_ADDR, phy_addr);
+
+		nvram_cmd = NVRAM_CMD_GO | NVRAM_CMD_DONE | NVRAM_CMD_WR |
+			NVRAM_CMD_FIRST | NVRAM_CMD_LAST | NVRAM_CMD_ERASE;
+
+	        if (tg3_nvram_exec_cmd(tp, nvram_cmd))
+			break;
+
+		/* Issue another write enable to start the write. */
+		nvram_cmd = NVRAM_CMD_WREN | NVRAM_CMD_GO | NVRAM_CMD_DONE;
+
+		if (tg3_nvram_exec_cmd(tp, nvram_cmd))
+			break;
+
+		for (j = 0; j < pagesize; j += 4) {
+			u32 data;
+
+	    		data = *((u32 *) (tmp + j));
+			tw32(NVRAM_WRDATA, cpu_to_be32(data));
+
+			tw32(NVRAM_ADDR, phy_addr + j);
+
+			nvram_cmd = NVRAM_CMD_GO | NVRAM_CMD_DONE |
+				NVRAM_CMD_WR;
+
+			if (j == 0)
+				nvram_cmd |= NVRAM_CMD_FIRST;
+			else if (j == (pagesize - 4))
+				nvram_cmd |= NVRAM_CMD_LAST;
+
+			if ((ret = tg3_nvram_exec_cmd(tp, nvram_cmd)))
+				break;
+		}
+		if (ret)
+			break;
+	}
+
+	nvram_cmd = NVRAM_CMD_WRDI | NVRAM_CMD_GO | NVRAM_CMD_DONE;
+	tg3_nvram_exec_cmd(tp, nvram_cmd);
+
+	kfree(tmp);
+
+	return ret;
+}
+
+/* offset and length are dword aligned */
+static int tg3_nvram_write_block_buffered(struct tg3 *tp, u32 offset, u32 len,
+		u8 *buf)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < len; i += 4, offset += 4) {
+		u32 data, page_off, phy_addr, nvram_cmd;
+
+		memcpy(&data, buf + i, 4);
+		tw32(NVRAM_WRDATA, cpu_to_be32(data));
+
+	        page_off = offset % tp->nvram_pagesize;
+
+		if ((tp->tg3_flags2 & TG3_FLG2_FLASH) &&
+			(tp->nvram_jedecnum == JEDEC_ATMEL)) {
+
+			phy_addr = ((offset / tp->nvram_pagesize) <<
+				    ATMEL_AT45DB0X1B_PAGE_POS) + page_off;
+		}
+		else {
+			phy_addr = offset;
+		}
+
+		tw32(NVRAM_ADDR, phy_addr);
+
+		nvram_cmd = NVRAM_CMD_GO | NVRAM_CMD_DONE | NVRAM_CMD_WR;
+
+	        if ((page_off == 0) || (i == 0))
+			nvram_cmd |= NVRAM_CMD_FIRST;
+		else if (page_off == (tp->nvram_pagesize - 4))
+			nvram_cmd |= NVRAM_CMD_LAST;
+
+		if (i == (len - 4))
+			nvram_cmd |= NVRAM_CMD_LAST;
+
+		if ((tp->nvram_jedecnum == JEDEC_ST) &&
+			(nvram_cmd & NVRAM_CMD_FIRST)) {
+
+			if ((ret = tg3_nvram_exec_cmd(tp,
+				NVRAM_CMD_WREN | NVRAM_CMD_GO |
+				NVRAM_CMD_DONE)))
+
+				break;
+		}
+		if (!(tp->tg3_flags2 & TG3_FLG2_FLASH)) {
+			/* We always do complete word writes to eeprom. */
+			nvram_cmd |= (NVRAM_CMD_FIRST | NVRAM_CMD_LAST);
+		}
+
+		if ((ret = tg3_nvram_exec_cmd(tp, nvram_cmd)))
+			break;
+	}
+	return ret;
+}
+
+/* offset and length are dword aligned */
+static int tg3_nvram_write_block(struct tg3 *tp, u32 offset, u32 len, u8 *buf)
+{
+	int ret;
+
+	if (tp->tg3_flags2 & TG3_FLG2_SUN_570X) {
+		printk(KERN_ERR PFX "Attempt to do nvram_write on Sun 570X\n");
+		return -EINVAL;
+	}
+
+	if (tp->tg3_flags & TG3_FLAG_EEPROM_WRITE_PROT) {
+		tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl |
+		       GRC_LCLCTRL_GPIO_OE1);
+		udelay(40);
+	}
+
+	if (!(tp->tg3_flags & TG3_FLAG_NVRAM)) {
+		ret = tg3_nvram_write_block_using_eeprom(tp, offset, len, buf);
+	}
+	else {
+		u32 grc_mode;
+
+		tg3_nvram_lock(tp);
 
 		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750) {
 			u32 nvaccess = tr32(NVRAM_ACCESS);
 
-		tw32_f(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);
+			tw32(NVRAM_ACCESS, nvaccess | ACCESS_ENABLE);
+
+			tw32(NVRAM_WRITE1, 0x406);
 		}
 
-	if (i >= 1000)
-		return -EBUSY;
+		grc_mode = tr32(GRC_MODE);
+		tw32(GRC_MODE, grc_mode | GRC_MODE_NVRAM_WR_ENABLE);
 
-	return 0;
+		if ((tp->tg3_flags & TG3_FLAG_NVRAM_BUFFERED) ||
+			!(tp->tg3_flags2 & TG3_FLG2_FLASH)) {
+
+			ret = tg3_nvram_write_block_buffered(tp, offset, len,
+				buf);
+		}
+		else {
+			ret = tg3_nvram_write_block_unbuffered(tp, offset, len,
+				buf);
+		}
+
+		grc_mode = tr32(GRC_MODE);
+		tw32(GRC_MODE, grc_mode & ~GRC_MODE_NVRAM_WR_ENABLE);
+
+		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750) {
+			u32 nvaccess = tr32(NVRAM_ACCESS);
+
+			tw32(NVRAM_ACCESS, nvaccess & ~ACCESS_ENABLE);
+		}
+		tg3_nvram_unlock(tp);
+	}
+
+	if (tp->tg3_flags & TG3_FLAG_EEPROM_WRITE_PROT) {
+		tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl |
+		       GRC_LCLCTRL_GPIO_OE1 | GRC_LCLCTRL_GPIO_OUTPUT1);
+		udelay(40);
+	}
+
+	return ret;
 }
 
 struct subsys_tbl_ent {

drivers/net/tg3.h

@@ -1274,6 +1274,7 @@
 #define  GRC_MODE_HOST_STACKUP		0x00010000
 #define  GRC_MODE_HOST_SENDBDS		0x00020000
 #define  GRC_MODE_NO_TX_PHDR_CSUM	0x00100000
+#define  GRC_MODE_NVRAM_WR_ENABLE	0x00200000
 #define  GRC_MODE_NO_RX_PHDR_CSUM	0x00800000
 #define  GRC_MODE_IRQ_ON_TX_CPU_ATTN	0x01000000
 #define  GRC_MODE_IRQ_ON_RX_CPU_ATTN	0x02000000
@@ -1366,6 +1367,8 @@
 #define  NVRAM_CMD_ERASE		 0x00000040
 #define  NVRAM_CMD_FIRST		 0x00000080
 #define  NVRAM_CMD_LAST			 0x00000100
+#define  NVRAM_CMD_WREN			 0x00010000
+#define  NVRAM_CMD_WRDI			 0x00020000
 #define NVRAM_STAT			0x00007004
 #define NVRAM_WRDATA			0x00007008
 #define NVRAM_ADDR			0x0000700c
@@ -1375,8 +1378,18 @@
 #define  NVRAM_CFG1_FLASHIF_ENAB	 0x00000001
 #define  NVRAM_CFG1_BUFFERED_MODE	 0x00000002
 #define  NVRAM_CFG1_PASS_THRU		 0x00000004
+#define  NVRAM_CFG1_STATUS_BITS		 0x00000070
 #define  NVRAM_CFG1_BIT_BANG		 0x00000008
+#define  NVRAM_CFG1_FLASH_SIZE		 0x02000000
 #define  NVRAM_CFG1_COMPAT_BYPASS	 0x80000000
+#define  NVRAM_CFG1_VENDOR_MASK		 0x03000003
+#define  FLASH_VENDOR_ATMEL_EEPROM	 0x02000000
+#define  FLASH_VENDOR_ATMEL_FLASH_BUFFERED	 0x02000003
+#define  FLASH_VENDOR_ATMEL_FLASH_UNBUFFERED	 0x00000003
+#define  FLASH_VENDOR_ST			 0x03000001
+#define  FLASH_VENDOR_SAIFUN		 0x01000003
+#define  FLASH_VENDOR_SST_SMALL		 0x00000001
+#define  FLASH_VENDOR_SST_LARGE		 0x02000001
 #define NVRAM_CFG2			0x00007018
 #define NVRAM_CFG3			0x0000701c
 #define NVRAM_SWARB			0x00007020
@@ -1396,15 +1409,16 @@
 #define  SWARB_REQ1			 0x00002000
 #define  SWARB_REQ2			 0x00004000
 #define  SWARB_REQ3			 0x00008000
-#define    NVRAM_BUFFERED_PAGE_SIZE	   264
-#define    NVRAM_BUFFERED_PAGE_POS	   9
 #define NVRAM_ACCESS			0x00007024
 #define  ACCESS_ENABLE			 0x00000001
 #define  ACCESS_WR_ENABLE		 0x00000002
-/* 0x7024 --> 0x7400 unused */
+#define NVRAM_WRITE1			0x00007028
+/* 0x702c --> 0x7400 unused */
 
 /* 0x7400 --> 0x8000 unused */
 
+#define TG3_EEPROM_MAGIC		0x669955aa
+
 /* 32K Window into NIC internal memory */
 #define NIC_SRAM_WIN_BASE		0x00008000
 
@@ -2090,6 +2104,7 @@ struct tg3 {
 #define TG3_FLG2_PHY_JUST_INITTED	0x00001000
 #define TG3_FLG2_PHY_SERDES		0x00002000
 #define TG3_FLG2_CAPACITIVE_COUPLING	0x00004000
+#define TG3_FLG2_FLASH			0x00008000
 
 	u32				split_mode_max_reqs;
 #define SPLIT_MODE_5704_MAX_REQ		3
@@ -2163,6 +2178,34 @@ struct tg3 {
 	struct tg3_hw_stats		*hw_stats;
 	dma_addr_t			stats_mapping;
 	struct work_struct		reset_task;
+
+	u32				nvram_size;
+	u32				nvram_pagesize;
+	u32				nvram_jedecnum;
+
+#define JEDEC_ATMEL			0x1f
+#define JEDEC_ST			0x20
+#define JEDEC_SAIFUN			0x4f
+#define JEDEC_SST			0xbf
+
+#define ATMEL_AT24C64_CHIP_SIZE		(64 * 1024)
+#define ATMEL_AT24C64_PAGE_SIZE		(32)
+
+#define ATMEL_AT24C512_CHIP_SIZE	(512 * 1024)
+#define ATMEL_AT24C512_PAGE_SIZE	(128)
+
+#define ATMEL_AT45DB0X1B_PAGE_POS	9
+#define ATMEL_AT45DB0X1B_PAGE_SIZE	264
+
+#define ATMEL_AT25F512_PAGE_SIZE	256
+
+#define ST_M45PEX0_PAGE_SIZE		256
+
+#define SAIFUN_SA25F0XX_PAGE_SIZE	256
+
+#define SST_25VF0X0_PAGE_SIZE		4098
+
+
 };
 
 #endif /* !(_T3_H) */