diff mbox

[09/16] ARM: ks8695: convert PCI to use generic config accesses

Message ID 1420857290-8373-10-git-send-email-robh@kernel.org (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Rob Herring (Arm) Jan. 10, 2015, 2:34 a.m. UTC
Convert the ks8695 PCI driver to use the generic config access functions.

This changes accesses from __raw_readX/__raw_writeX to readX/writeX
variants.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm/mach-ks8695/pci.c | 77 ++++------------------------------------------
 1 file changed, 6 insertions(+), 71 deletions(-)

Comments

Greg Ungerer Jan. 12, 2015, 12:38 p.m. UTC | #1
Hi Rob,

On 10/01/15 12:34, Rob Herring wrote:
> Convert the ks8695 PCI driver to use the generic config access functions.
>
> This changes accesses from __raw_readX/__raw_writeX to readX/writeX
> variants.
>
> Signed-off-by: Rob Herring <robh@kernel.org>
> Cc: Greg Ungerer <gerg@uclinux.org>

I wasn't CC'ed on the generic implementation patch ("pci: introduce
common pci config space accessors"), but I assume this is it:
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg800405.html

That all looks ok to me. I have not tested it, but:

Acked-by: Greg Ungerer <gerg@uclinux.org>

Regards
Greg


> Cc: Russell King <linux@arm.linux.org.uk>
> Cc: linux-arm-kernel@lists.infradead.org
> ---
>   arch/arm/mach-ks8695/pci.c | 77 ++++------------------------------------------
>   1 file changed, 6 insertions(+), 71 deletions(-)
>
> diff --git a/arch/arm/mach-ks8695/pci.c b/arch/arm/mach-ks8695/pci.c
> index bb18193..c1bc4c3 100644
> --- a/arch/arm/mach-ks8695/pci.c
> +++ b/arch/arm/mach-ks8695/pci.c
> @@ -38,8 +38,6 @@
>   
>   
>   static int pci_dbg;
> -static int pci_cfg_dbg;
> -
>   
>   static void ks8695_pci_setupconfig(unsigned int bus_nr, unsigned int devfn, unsigned int where)
>   {
> @@ -59,75 +57,11 @@ static void ks8695_pci_setupconfig(unsigned int bus_nr, unsigned int devfn, unsi
>   	}
>   }
>   
> -
> -/*
> - * The KS8695 datasheet prohibits anything other than 32bit accesses
> - * to the IO registers, so all our configuration must be done with
> - * 32bit operations, and the correct bit masking and shifting.
> - */
> -
> -static int ks8695_pci_readconfig(struct pci_bus *bus,
> -			unsigned int devfn, int where, int size, u32 *value)
> -{
> -	ks8695_pci_setupconfig(bus->number, devfn, where);
> -
> -	*value = __raw_readl(KS8695_PCI_VA +  KS8695_PBCD);
> -
> -	switch (size) {
> -		case 4:
> -			break;
> -		case 2:
> -			*value = *value >> ((where & 2) * 8);
> -			*value &= 0xffff;
> -			break;
> -		case 1:
> -			*value = *value >> ((where & 3) * 8);
> -			*value &= 0xff;
> -			break;
> -	}
> -
> -	if (pci_cfg_dbg) {
> -		printk("read: %d,%08x,%02x,%d: %08x (%08x)\n",
> -			bus->number, devfn, where, size, *value,
> -			__raw_readl(KS8695_PCI_VA +  KS8695_PBCD));
> -	}
> -
> -	return PCIBIOS_SUCCESSFUL;
> -}
> -
> -static int ks8695_pci_writeconfig(struct pci_bus *bus,
> -			unsigned int devfn, int where, int size, u32 value)
> +static void __iomem *ks8695_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
> +					int where)
>   {
> -	unsigned long tmp;
> -
> -	if (pci_cfg_dbg) {
> -		printk("write: %d,%08x,%02x,%d: %08x\n",
> -			bus->number, devfn, where, size, value);
> -	}
> -
>   	ks8695_pci_setupconfig(bus->number, devfn, where);
> -
> -	switch (size) {
> -		case 4:
> -			__raw_writel(value, KS8695_PCI_VA +  KS8695_PBCD);
> -			break;
> -		case 2:
> -			tmp = __raw_readl(KS8695_PCI_VA +  KS8695_PBCD);
> -			tmp &= ~(0xffff << ((where & 2) * 8));
> -			tmp |= value << ((where & 2) * 8);
> -
> -			__raw_writel(tmp, KS8695_PCI_VA +  KS8695_PBCD);
> -			break;
> -		case 1:
> -			tmp = __raw_readl(KS8695_PCI_VA +  KS8695_PBCD);
> -			tmp &= ~(0xff << ((where & 3) * 8));
> -			tmp |= value << ((where & 3) * 8);
> -
> -			__raw_writel(tmp, KS8695_PCI_VA +  KS8695_PBCD);
> -			break;
> -	}
> -
> -	return PCIBIOS_SUCCESSFUL;
> +	return KS8695_PCI_VA +  KS8695_PBCD;
>   }
>   
>   static void ks8695_local_writeconfig(int where, u32 value)
> @@ -137,8 +71,9 @@ static void ks8695_local_writeconfig(int where, u32 value)
>   }
>   
>   static struct pci_ops ks8695_pci_ops = {
> -	.read	= ks8695_pci_readconfig,
> -	.write	= ks8695_pci_writeconfig,
> +	.map_bus = ks8695_pci_map_bus,
> +	.read	= pci_generic_config_read32,
> +	.write	= pci_generic_config_write32,
>   };
>   
>   static struct resource pci_mem = {

--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/arch/arm/mach-ks8695/pci.c b/arch/arm/mach-ks8695/pci.c
index bb18193..c1bc4c3 100644
--- a/arch/arm/mach-ks8695/pci.c
+++ b/arch/arm/mach-ks8695/pci.c
@@ -38,8 +38,6 @@ 
 
 
 static int pci_dbg;
-static int pci_cfg_dbg;
-
 
 static void ks8695_pci_setupconfig(unsigned int bus_nr, unsigned int devfn, unsigned int where)
 {
@@ -59,75 +57,11 @@  static void ks8695_pci_setupconfig(unsigned int bus_nr, unsigned int devfn, unsi
 	}
 }
 
-
-/*
- * The KS8695 datasheet prohibits anything other than 32bit accesses
- * to the IO registers, so all our configuration must be done with
- * 32bit operations, and the correct bit masking and shifting.
- */
-
-static int ks8695_pci_readconfig(struct pci_bus *bus,
-			unsigned int devfn, int where, int size, u32 *value)
-{
-	ks8695_pci_setupconfig(bus->number, devfn, where);
-
-	*value = __raw_readl(KS8695_PCI_VA +  KS8695_PBCD);
-
-	switch (size) {
-		case 4:
-			break;
-		case 2:
-			*value = *value >> ((where & 2) * 8);
-			*value &= 0xffff;
-			break;
-		case 1:
-			*value = *value >> ((where & 3) * 8);
-			*value &= 0xff;
-			break;
-	}
-
-	if (pci_cfg_dbg) {
-		printk("read: %d,%08x,%02x,%d: %08x (%08x)\n",
-			bus->number, devfn, where, size, *value,
-			__raw_readl(KS8695_PCI_VA +  KS8695_PBCD));
-	}
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int ks8695_pci_writeconfig(struct pci_bus *bus,
-			unsigned int devfn, int where, int size, u32 value)
+static void __iomem *ks8695_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
+					int where)
 {
-	unsigned long tmp;
-
-	if (pci_cfg_dbg) {
-		printk("write: %d,%08x,%02x,%d: %08x\n",
-			bus->number, devfn, where, size, value);
-	}
-
 	ks8695_pci_setupconfig(bus->number, devfn, where);
-
-	switch (size) {
-		case 4:
-			__raw_writel(value, KS8695_PCI_VA +  KS8695_PBCD);
-			break;
-		case 2:
-			tmp = __raw_readl(KS8695_PCI_VA +  KS8695_PBCD);
-			tmp &= ~(0xffff << ((where & 2) * 8));
-			tmp |= value << ((where & 2) * 8);
-
-			__raw_writel(tmp, KS8695_PCI_VA +  KS8695_PBCD);
-			break;
-		case 1:
-			tmp = __raw_readl(KS8695_PCI_VA +  KS8695_PBCD);
-			tmp &= ~(0xff << ((where & 3) * 8));
-			tmp |= value << ((where & 3) * 8);
-
-			__raw_writel(tmp, KS8695_PCI_VA +  KS8695_PBCD);
-			break;
-	}
-
-	return PCIBIOS_SUCCESSFUL;
+	return KS8695_PCI_VA +  KS8695_PBCD;
 }
 
 static void ks8695_local_writeconfig(int where, u32 value)
@@ -137,8 +71,9 @@  static void ks8695_local_writeconfig(int where, u32 value)
 }
 
 static struct pci_ops ks8695_pci_ops = {
-	.read	= ks8695_pci_readconfig,
-	.write	= ks8695_pci_writeconfig,
+	.map_bus = ks8695_pci_map_bus,
+	.read	= pci_generic_config_read32,
+	.write	= pci_generic_config_write32,
 };
 
 static struct resource pci_mem = {