sky2: add support for read/write of EEPROM

Add get/set eeprom support for sky2.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 115 insertions, 25 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index b0950e1c4b68..99a999383e9b 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -77,6 +77,9 @@
 #define NAPI_WEIGHT             64
 #define PHY_RETRIES             1000
 
+#define SKY2_EEPROM_MAGIC       0x9955aabb
+
+
 #define RING_NEXT(x,s)  (((x)+1) & ((s)-1))
 
 static const u32 default_msg =
@@ -3429,34 +3432,121 @@ static int sky2_set_tso(struct net_device *dev, u32 data)
         return ethtool_op_set_tso(dev, data);
 }
 
+static int sky2_get_eeprom_len(struct net_device *dev)
+{
+        struct sky2_port *sky2 = netdev_priv(dev);
+        u16 reg2;
+
+        reg2 = sky2_pci_read32(sky2->hw, PCI_DEV_REG2);
+        return 1 << ( ((reg2 & PCI_VPD_ROM_SZ) >> 14) + 8);
+}
+
+static u32 sky2_vpd_read(struct sky2_hw *hw, int cap, u16 offset)
+{
+        sky2_pci_write16(hw, cap + PCI_VPD_ADDR, offset);
+
+        while (!(sky2_pci_read16(hw, cap + PCI_VPD_ADDR) & PCI_VPD_ADDR_F))
+                        cpu_relax();
+        return sky2_pci_read32(hw, cap + PCI_VPD_DATA);
+}
+
+static void sky2_vpd_write(struct sky2_hw *hw, int cap, u16 offset, u32 val)
+{
+        sky2_pci_write32(hw, cap + PCI_VPD_DATA, val);
+        sky2_pci_write16(hw, cap + PCI_VPD_ADDR, offset | PCI_VPD_ADDR_F);
+        do {
+                cpu_relax();
+        } while (sky2_pci_read16(hw, cap + PCI_VPD_ADDR) & PCI_VPD_ADDR_F);
+}
+
+static int sky2_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
+                           u8 *data)
+{
+        struct sky2_port *sky2 = netdev_priv(dev);
+        int cap = pci_find_capability(sky2->hw->pdev, PCI_CAP_ID_VPD);
+        int length = eeprom->len;
+        u16 offset = eeprom->offset;
+
+        if (!cap)
+                return -EINVAL;
+
+        eeprom->magic = SKY2_EEPROM_MAGIC;
+
+        while (length > 0) {
+                u32 val = sky2_vpd_read(sky2->hw, cap, offset);
+                int n = min_t(int, length, sizeof(val));
+
+                memcpy(data, &val, n);
+                length -= n;
+                data += n;
+                offset += n;
+        }
+        return 0;
+}
+
+static int sky2_set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
+                           u8 *data)
+{
+        struct sky2_port *sky2 = netdev_priv(dev);
+        int cap = pci_find_capability(sky2->hw->pdev, PCI_CAP_ID_VPD);
+        int length = eeprom->len;
+        u16 offset = eeprom->offset;
+
+        if (!cap)
+                return -EINVAL;
+
+        if (eeprom->magic != SKY2_EEPROM_MAGIC)
+                return -EINVAL;
+
+        while (length > 0) {
+                u32 val;
+                int n = min_t(int, length, sizeof(val));
+
+                if (n < sizeof(val))
+                        val = sky2_vpd_read(sky2->hw, cap, offset);
+                memcpy(&val, data, n);
+
+                sky2_vpd_write(sky2->hw, cap, offset, val);
+
+                length -= n;
+                data += n;
+                offset += n;
+        }
+        return 0;
+}
+
+
 static const struct ethtool_ops sky2_ethtool_ops = {
-        .get_settings = sky2_get_settings,
-        .set_settings = sky2_set_settings,
-        .get_drvinfo  = sky2_get_drvinfo,
-        .get_wol      = sky2_get_wol,
-        .set_wol      = sky2_set_wol,
-        .get_msglevel = sky2_get_msglevel,
-        .set_msglevel = sky2_set_msglevel,
-        .nway_reset   = sky2_nway_reset,
-        .get_regs_len = sky2_get_regs_len,
-        .get_regs = sky2_get_regs,
-        .get_link = ethtool_op_get_link,
-        .get_sg = ethtool_op_get_sg,
-        .set_sg = ethtool_op_set_sg,
-        .get_tx_csum = ethtool_op_get_tx_csum,
-        .set_tx_csum = sky2_set_tx_csum,
-        .get_tso = ethtool_op_get_tso,
-        .set_tso = sky2_set_tso,
-        .get_rx_csum = sky2_get_rx_csum,
-        .set_rx_csum = sky2_set_rx_csum,
-        .get_strings = sky2_get_strings,
-        .get_coalesce = sky2_get_coalesce,
-        .set_coalesce = sky2_set_coalesce,
-        .get_ringparam = sky2_get_ringparam,
-        .set_ringparam = sky2_set_ringparam,
+        .get_settings   = sky2_get_settings,
+        .set_settings   = sky2_set_settings,
+        .get_drvinfo    = sky2_get_drvinfo,
+        .get_wol        = sky2_get_wol,
+        .set_wol        = sky2_set_wol,
+        .get_msglevel   = sky2_get_msglevel,
+        .set_msglevel   = sky2_set_msglevel,
+        .nway_reset     = sky2_nway_reset,
+        .get_regs_len   = sky2_get_regs_len,
+        .get_regs       = sky2_get_regs,
+        .get_link       = ethtool_op_get_link,
+        .get_eeprom_len = sky2_get_eeprom_len,
+        .get_eeprom     = sky2_get_eeprom,
+        .set_eeprom     = sky2_set_eeprom,
+        .get_sg         = ethtool_op_get_sg,
+        .set_sg         = ethtool_op_set_sg,
+        .get_tx_csum    = ethtool_op_get_tx_csum,
+        .set_tx_csum    = sky2_set_tx_csum,
+        .get_tso        = ethtool_op_get_tso,
+        .set_tso        = sky2_set_tso,
+        .get_rx_csum    = sky2_get_rx_csum,
+        .set_rx_csum    = sky2_set_rx_csum,
+        .get_strings    = sky2_get_strings,
+        .get_coalesce   = sky2_get_coalesce,
+        .set_coalesce   = sky2_set_coalesce,
+        .get_ringparam  = sky2_get_ringparam,
+        .set_ringparam  = sky2_set_ringparam,
         .get_pauseparam = sky2_get_pauseparam,
         .set_pauseparam = sky2_set_pauseparam,
-        .phys_id = sky2_phys_id,
+        .phys_id        = sky2_phys_id,
         .get_stats_count = sky2_get_stats_count,
         .get_ethtool_stats = sky2_get_ethtool_stats,
         .get_perm_addr  = ethtool_op_get_perm_addr,