[PATCH] sky2: use device iomem to access PCI config

To avoid problems with PCI config access without ACPI (or busted ACPI tables),
use the device's window into PCI config space.

I know this probably will upset the purists, but I would rather have users
than ACPI testers. It also generates less code.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>

2 files changed, 54 insertions, 48 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index d913d3407e90..fbbc85532c2e 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -195,11 +195,11 @@ static int sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
         pr_debug("sky2_set_power_state %d\n", state);
         sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
 
-        pci_read_config_word(hw->pdev, hw->pm_cap + PCI_PM_PMC, &power_control);
+        power_control = sky2_pci_read16(hw, hw->pm_cap + PCI_PM_PMC);
         vaux = (sky2_read16(hw, B0_CTST) & Y2_VAUX_AVAIL) &&
                 (power_control & PCI_PM_CAP_PME_D3cold);
 
-        pci_read_config_word(hw->pdev, hw->pm_cap + PCI_PM_CTRL, &power_control);
+        power_control = sky2_pci_read16(hw, hw->pm_cap + PCI_PM_CTRL);
 
         power_control |= PCI_PM_CTRL_PME_STATUS;
         power_control &= ~(PCI_PM_CTRL_STATE_MASK);
@@ -223,7 +223,7 @@ static int sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
                         sky2_write8(hw, B2_Y2_CLK_GATE, 0);
 
                 /* Turn off phy power saving */
-                pci_read_config_dword(hw->pdev, PCI_DEV_REG1, &reg1);
+                reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
                 reg1 &= ~(PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD);
 
                 /* looks like this XL is back asswards .. */
@@ -234,26 +234,26 @@ static int sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
                 }
 
                 if (hw->chip_id == CHIP_ID_YUKON_EC_U) {
-                        pci_write_config_dword(hw->pdev, PCI_DEV_REG3, 0);
-                        pci_read_config_dword(hw->pdev, PCI_DEV_REG4, &reg1);
+                        sky2_pci_write32(hw, PCI_DEV_REG3, 0);
+                        reg1 = sky2_pci_read32(hw, PCI_DEV_REG4);
                         reg1 &= P_ASPM_CONTROL_MSK;
-                        pci_write_config_dword(hw->pdev, PCI_DEV_REG4, reg1);
-                        pci_write_config_dword(hw->pdev, PCI_DEV_REG5, 0);
+                        sky2_pci_write32(hw, PCI_DEV_REG4, reg1);
+                        sky2_pci_write32(hw, PCI_DEV_REG5, 0);
                 }
 
-                pci_write_config_dword(hw->pdev, PCI_DEV_REG1, reg1);
+                sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
 
                 break;
 
         case PCI_D3hot:
         case PCI_D3cold:
                 /* Turn on phy power saving */
-                pci_read_config_dword(hw->pdev, PCI_DEV_REG1, &reg1);
+                reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
                 if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1)
                         reg1 &= ~(PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD);
                 else
                         reg1 |= (PCI_Y2_PHY1_POWD | PCI_Y2_PHY2_POWD);
-                pci_write_config_dword(hw->pdev, PCI_DEV_REG1, reg1);
+                sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
 
                 if (hw->chip_id == CHIP_ID_YUKON_XL && hw->chip_rev > 1)
                         sky2_write8(hw, B2_Y2_CLK_GATE, 0);
@@ -275,7 +275,7 @@ static int sky2_set_power_state(struct sky2_hw *hw, pci_power_t state)
                 ret = -1;
         }
 
-        pci_write_config_byte(hw->pdev, hw->pm_cap + PCI_PM_CTRL, power_control);
+        sky2_pci_write16(hw, hw->pm_cap + PCI_PM_CTRL, power_control);
         sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
         return ret;
 }
@@ -2059,13 +2059,13 @@ static void sky2_hw_intr(struct sky2_hw *hw)
         if (status & (Y2_IS_MST_ERR | Y2_IS_IRQ_STAT)) {
                 u16 pci_err;
 
-                pci_read_config_word(hw->pdev, PCI_STATUS, &pci_err);
+                pci_err = sky2_pci_read16(hw, PCI_STATUS);
                 if (net_ratelimit())
                         printk(KERN_ERR PFX "%s: pci hw error (0x%x)\n",
                                pci_name(hw->pdev), pci_err);
 
                 sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
-                pci_write_config_word(hw->pdev, PCI_STATUS,
+                sky2_pci_write16(hw, PCI_STATUS,
                                       pci_err | PCI_STATUS_ERROR_BITS);
                 sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
         }
@@ -2074,7 +2074,7 @@ static void sky2_hw_intr(struct sky2_hw *hw)
                 /* PCI-Express uncorrectable Error occurred */
                 u32 pex_err;
 
-                pci_read_config_dword(hw->pdev, PEX_UNC_ERR_STAT, &pex_err);
+                pex_err = sky2_pci_read32(hw, PEX_UNC_ERR_STAT);
 
                 if (net_ratelimit())
                         printk(KERN_ERR PFX "%s: pci express error (0x%x)\n",
@@ -2082,7 +2082,7 @@ static void sky2_hw_intr(struct sky2_hw *hw)
 
                 /* clear the interrupt */
                 sky2_write32(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
-                pci_write_config_dword(hw->pdev, PEX_UNC_ERR_STAT,
+                sky2_pci_write32(hw, PEX_UNC_ERR_STAT,
                                        0xffffffffUL);
                 sky2_write32(hw, B2_TST_CTRL1, TST_CFG_WRITE_OFF);
 
@@ -2212,7 +2212,7 @@ static int sky2_reset(struct sky2_hw *hw)
 {
         u16 status;
         u8 t8, pmd_type;
-        int i, err;
+        int i;
 
         sky2_write8(hw, B0_CTST, CS_RST_CLR);
 
@@ -2234,25 +2234,18 @@ static int sky2_reset(struct sky2_hw *hw)
         sky2_write8(hw, B0_CTST, CS_RST_CLR);
 
         /* clear PCI errors, if any */
-        err = pci_read_config_word(hw->pdev, PCI_STATUS, &status);
-        if (err)
-                goto pci_err;
+        status = sky2_pci_read16(hw, PCI_STATUS);
 
         sky2_write8(hw, B2_TST_CTRL1, TST_CFG_WRITE_ON);
-        err = pci_write_config_word(hw->pdev, PCI_STATUS,
-                                    status | PCI_STATUS_ERROR_BITS);
-        if (err)
-                goto pci_err;
+        sky2_pci_write16(hw, PCI_STATUS, status | PCI_STATUS_ERROR_BITS);
+
 
         sky2_write8(hw, B0_CTST, CS_MRST_CLR);
 
         /* clear any PEX errors */
-        if (pci_find_capability(hw->pdev, PCI_CAP_ID_EXP)) {
-                err = pci_write_config_dword(hw->pdev, PEX_UNC_ERR_STAT,
-                                                 0xffffffffUL);
-                if (err)
-                        goto pci_err;
-        }
+        if (pci_find_capability(hw->pdev, PCI_CAP_ID_EXP)) 
+                sky2_pci_write32(hw, PEX_UNC_ERR_STAT, 0xffffffffUL);
+
 
         pmd_type = sky2_read8(hw, B2_PMD_TYP);
         hw->copper = !(pmd_type == 'L' || pmd_type == 'S');
@@ -2362,14 +2355,6 @@ static int sky2_reset(struct sky2_hw *hw)
         sky2_write8(hw, STAT_ISR_TIMER_CTRL, TIM_START);
 
         return 0;
-
-pci_err:
-        /* This is to catch a BIOS bug workaround where
-         * mmconfig table doesn't have other buses.
-         */
-        printk(KERN_ERR PFX "%s: can't access PCI config space\n",
-               pci_name(hw->pdev));
-        return err;
 }
 
 static u32 sky2_supported_modes(const struct sky2_hw *hw)
@@ -3239,17 +3224,6 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
                 }
         }
 
-#ifdef __BIG_ENDIAN
-        /* byte swap descriptors in hardware */
-        {
-                u32 reg;
-
-                pci_read_config_dword(pdev, PCI_DEV_REG2, &reg);
-                reg |= PCI_REV_DESC;
-                pci_write_config_dword(pdev, PCI_DEV_REG2, reg);
-        }
-#endif
-
         err = -ENOMEM;
         hw = kzalloc(sizeof(*hw), GFP_KERNEL);
         if (!hw) {
@@ -3268,6 +3242,17 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
         }
         hw->pm_cap = pm_cap;
 
+#ifdef __BIG_ENDIAN
+        /* byte swap descriptors in hardware */
+        {
+                u32 reg;
+
+                reg = sky2_pci_read32(hw, PCI_DEV_REG2);
+                reg |= PCI_REV_DESC;
+                sky2_pci_write32(hw, PCI_DEV_REG2, reg);
+        }
+#endif
+
         /* ring for status responses */
         hw->st_le = pci_alloc_consistent(hw->pdev, STATUS_LE_BYTES,
                                          &hw->st_dma);
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index d1c71f50d8b9..9e40766150b4 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -1951,4 +1951,25 @@ static inline void gma_set_addr(struct sky2_hw *hw, unsigned port, unsigned reg,
         gma_write16(hw, port, reg+4,(u16) addr[2] | ((u16) addr[3] << 8));
         gma_write16(hw, port, reg+8,(u16) addr[4] | ((u16) addr[5] << 8));
 }
+
+/* PCI config space access */
+static inline u32 sky2_pci_read32(const struct sky2_hw *hw, unsigned reg)
+{
+        return sky2_read32(hw, Y2_CFG_SPC + reg);
+}
+
+static inline u16 sky2_pci_read16(const struct sky2_hw *hw, unsigned reg)
+{
+        return sky2_read16(hw, Y2_CFG_SPC + reg);
+}
+
+static inline void sky2_pci_write32(struct sky2_hw *hw, unsigned reg, u32 val)
+{
+        sky2_write32(hw, Y2_CFG_SPC + reg, val);
+}
+
+static inline void sky2_pci_write16(struct sky2_hw *hw, unsigned reg, u16 val)
+{
+        sky2_write16(hw, Y2_CFG_SPC + reg, val);
+}
 #endif