skge: eeprom support

Add ability to read/write EEPROM

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

2 files changed, 102 insertions, 2 deletions

diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index a439d4304458..953f8023f24c 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -59,6 +59,9 @@
 #define BLINK_MS                250
 #define LINK_HZ                 HZ
 
+#define SKGE_EEPROM_MAGIC       0x9933aabb
+
+
 MODULE_DESCRIPTION("SysKonnect Gigabit Ethernet driver");
 MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
 MODULE_LICENSE("GPL");
@@ -798,6 +801,98 @@ static int skge_phys_id(struct net_device *dev, u32 data)
         return 0;
 }
 
+static int skge_get_eeprom_len(struct net_device *dev)
+{
+        struct skge_port *skge = netdev_priv(dev);
+        u32 reg2;
+
+        pci_read_config_dword(skge->hw->pdev, PCI_DEV_REG2, &reg2);
+        return 1 << ( ((reg2 & PCI_VPD_ROM_SZ) >> 14) + 8);
+}
+
+static u32 skge_vpd_read(struct pci_dev *pdev, int cap, u16 offset)
+{
+        u32 val;
+
+        pci_write_config_word(pdev, cap + PCI_VPD_ADDR, offset);
+
+        do {
+                pci_read_config_word(pdev, cap + PCI_VPD_ADDR, &offset);
+        } while (!(offset & PCI_VPD_ADDR_F));
+
+        pci_read_config_dword(pdev, cap + PCI_VPD_DATA, &val);
+        return val;
+}
+
+static void skge_vpd_write(struct pci_dev *pdev, int cap, u16 offset, u32 val)
+{
+        pci_write_config_dword(pdev, cap + PCI_VPD_DATA, val);
+        pci_write_config_word(pdev, cap + PCI_VPD_ADDR,
+                              offset | PCI_VPD_ADDR_F);
+
+        do {
+                pci_read_config_word(pdev, cap + PCI_VPD_ADDR, &offset);
+        } while (offset & PCI_VPD_ADDR_F);
+}
+
+static int skge_get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
+                           u8 *data)
+{
+        struct skge_port *skge = netdev_priv(dev);
+        struct pci_dev *pdev = skge->hw->pdev;
+        int cap = pci_find_capability(pdev, PCI_CAP_ID_VPD);
+        int length = eeprom->len;
+        u16 offset = eeprom->offset;
+
+        if (!cap)
+                return -EINVAL;
+
+        eeprom->magic = SKGE_EEPROM_MAGIC;
+
+        while (length > 0) {
+                u32 val = skge_vpd_read(pdev, cap, offset);
+                int n = min_t(int, length, sizeof(val));
+
+                memcpy(data, &val, n);
+                length -= n;
+                data += n;
+                offset += n;
+        }
+        return 0;
+}
+
+static int skge_set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
+                           u8 *data)
+{
+        struct skge_port *skge = netdev_priv(dev);
+        struct pci_dev *pdev = skge->hw->pdev;
+        int cap = pci_find_capability(pdev, PCI_CAP_ID_VPD);
+        int length = eeprom->len;
+        u16 offset = eeprom->offset;
+
+        if (!cap)
+                return -EINVAL;
+
+        if (eeprom->magic != SKGE_EEPROM_MAGIC)
+                return -EINVAL;
+
+        while (length > 0) {
+                u32 val;
+                int n = min_t(int, length, sizeof(val));
+
+                if (n < sizeof(val))
+                        val = skge_vpd_read(pdev, cap, offset);
+                memcpy(&val, data, n);
+
+                skge_vpd_write(pdev, cap, offset, val);
+
+                length -= n;
+                data += n;
+                offset += n;
+        }
+        return 0;
+}
+
 static const struct ethtool_ops skge_ethtool_ops = {
         .get_settings   = skge_get_settings,
         .set_settings   = skge_set_settings,
@@ -810,6 +905,9 @@ static const struct ethtool_ops skge_ethtool_ops = {
         .set_msglevel   = skge_set_msglevel,
         .nway_reset     = skge_nway_reset,
         .get_link       = ethtool_op_get_link,
+        .get_eeprom_len = skge_get_eeprom_len,
+        .get_eeprom     = skge_get_eeprom,
+        .set_eeprom     = skge_set_eeprom,
         .get_ringparam  = skge_get_ring_param,
         .set_ringparam  = skge_set_ring_param,
         .get_pauseparam = skge_get_pauseparam,
diff --git a/drivers/net/skge.h b/drivers/net/skge.h
index 800329d99b21..51754246d59d 100644
--- a/drivers/net/skge.h
+++ b/drivers/net/skge.h
@@ -1,5 +1,5 @@
 /*
- * Definitions for the new Marvell Yukon / SysKonenct driver.
+ * Definitions for the new Marvell Yukon / SysKonnect driver.
  */
 #ifndef _SKGE_H
 #define _SKGE_H
@@ -8,8 +8,10 @@
 #define PCI_DEV_REG1    0x40
 #define  PCI_PHY_COMA   0x8000000
 #define  PCI_VIO        0x2000000
+
 #define PCI_DEV_REG2    0x44
-#define  PCI_REV_DESC    0x4
+#define  PCI_VPD_ROM_SZ 7L<<14  /* VPD ROM size 0=256, 1=512, ... */
+#define  PCI_REV_DESC   1<<2    /* Reverse Descriptor bytes */
 
 #define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
                                PCI_STATUS_SIG_SYSTEM_ERROR | \