tg3: Handle NVRAM absent cases

Some 57780 ASIC revision parts do not have NVRAM.  Code the driver so
that it is tolerant of this configuration.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 33 insertions, 4 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index e4fa02c7927..9b04954b694 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8544,6 +8544,9 @@ static int tg3_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
         u32 i, offset, len, b_offset, b_count;
         __be32 val;
 
+        if (tp->tg3_flags3 & TG3_FLG3_NO_NVRAM)
+                return -EINVAL;
+
         if (tp->link_config.phy_is_low_power)
                 return -EAGAIN;
 
@@ -8609,7 +8612,8 @@ static int tg3_set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
         if (tp->link_config.phy_is_low_power)
                 return -EAGAIN;
 
-        if (eeprom->magic != TG3_EEPROM_MAGIC)
+        if ((tp->tg3_flags3 & TG3_FLG3_NO_NVRAM) ||
+            eeprom->magic != TG3_EEPROM_MAGIC)
                 return -EINVAL;
 
         offset = eeprom->offset;
@@ -9206,6 +9210,9 @@ static int tg3_test_nvram(struct tg3 *tp)
         __be32 *buf;
         int i, j, k, err = 0, size;
 
+        if (tp->tg3_flags3 & TG3_FLG3_NO_NVRAM)
+                return 0;
+
         if (tg3_nvram_read(tp, 0, &magic) != 0)
                 return -EIO;
 
@@ -10188,7 +10195,8 @@ static void __devinit tg3_get_nvram_size(struct tg3 *tp)
 {
         u32 val;
 
-        if (tg3_nvram_read(tp, 0, &val) != 0)
+        if ((tp->tg3_flags3 & TG3_FLG3_NO_NVRAM) ||
+            tg3_nvram_read(tp, 0, &val) != 0)
                 return;
 
         /* Selfboot format */
@@ -10570,6 +10578,7 @@ static void __devinit tg3_get_57780_nvram_info(struct tg3 *tp)
                 }
                 break;
         default:
+                tp->tg3_flags3 |= TG3_FLG3_NO_NVRAM;
                 return;
         }
 
@@ -11370,7 +11379,8 @@ static void __devinit tg3_read_partno(struct tg3 *tp)
         unsigned int i;
         u32 magic;
 
-        if (tg3_nvram_read(tp, 0x0, &magic))
+        if ((tp->tg3_flags3 & TG3_FLG3_NO_NVRAM) ||
+            tg3_nvram_read(tp, 0x0, &magic))
                 goto out_not_found;
 
         if (magic == TG3_EEPROM_MAGIC) {
@@ -11462,6 +11472,15 @@ static void __devinit tg3_read_partno(struct tg3 *tp)
 out_not_found:
         if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
                 strcpy(tp->board_part_number, "BCM95906");
+        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 &&
+                 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57780)
+                strcpy(tp->board_part_number, "BCM57780");
+        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 &&
+                 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57760)
+                strcpy(tp->board_part_number, "BCM57760");
+        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 &&
+                 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57790)
+                strcpy(tp->board_part_number, "BCM57790");
         else
                 strcpy(tp->board_part_number, "none");
 }
@@ -11672,6 +11691,14 @@ static void __devinit tg3_read_fw_ver(struct tg3 *tp)
 {
         u32 val;
 
+        if (tp->tg3_flags3 & TG3_FLG3_NO_NVRAM) {
+                tp->fw_ver[0] = 's';
+                tp->fw_ver[1] = 'b';
+                tp->fw_ver[2] = '\0';
+
+                return;
+        }
+
         if (tg3_nvram_read(tp, 0, &val))
                 return;
 
@@ -12459,7 +12486,8 @@ static int __devinit tg3_get_device_address(struct tg3 *tp)
         }
         if (!addr_ok) {
                 /* Next, try NVRAM. */
-                if (!tg3_nvram_read_be32(tp, mac_offset + 0, &hi) &&
+                if (!(tp->tg3_flags3 & TG3_FLG3_NO_NVRAM) &&
+                    !tg3_nvram_read_be32(tp, mac_offset + 0, &hi) &&
                     !tg3_nvram_read_be32(tp, mac_offset + 4, &lo)) {
                         memcpy(&dev->dev_addr[0], ((char *)&hi) + 2, 2);
                         memcpy(&dev->dev_addr[2], (char *)&lo, sizeof(lo));
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index ca71a49a3fd..afbabf283c5 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2636,6 +2636,7 @@ struct tg3 {
 #define TG3_FLG3_CLKREQ_BUG             0x00000800
 #define TG3_FLG3_PHY_ENABLE_APD         0x00001000
 #define TG3_FLG3_5755_PLUS              0x00002000
+#define TG3_FLG3_NO_NVRAM               0x00004000
 
         struct timer_list               timer;
         u16                             timer_counter;