[PATCH] sky2: use device iomem to access PCI config
Stephen Hemminger [Wed, 22 Feb 2006 19:45:02 +0000 (11:45 -0800)]
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>

drivers/net/sky2.c
drivers/net/sky2.h

index d913d34..fbbc855 100644 (file)
@@ -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);
index d1c71f5..9e40766 100644 (file)
@@ -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