linux-kernel - [PATCH 14/16] pci/host: tegra: convert to use generic config accesses

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Date:	Fri,  9 Jan 2015 20:34:48 -0600
From:	Rob Herring <robh@...nel.org>
To:	linux-kernel@...r.kernel.org
Cc:	Arnd Bergmann <arnd@...db.de>, linux-pci@...r.kernel.org,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Rob Herring <robh@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-tegra@...r.kernel.org
Subject: [PATCH 14/16] pci/host: tegra: convert to use generic config accesses

Convert the tegra host PCI driver to use the generic config access
functions.

Signed-off-by: Rob Herring <robh@...nel.org>
Cc: Thierry Reding <thierry.reding@...il.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Stephen Warren <swarren@...dotorg.org>
Cc: Alexandre Courbot <gnurou@...il.com>
Cc: linux-tegra@...r.kernel.org
Cc: linux-pci@...r.kernel.org
---
 drivers/pci/host/pci-tegra.c | 55 +++-----------------------------------------
 1 file changed, 3 insertions(+), 52 deletions(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index a800ae9..44fd31b 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -480,59 +480,10 @@ static void __iomem *tegra_pcie_conf_address(struct pci_bus *bus,
 	return addr;
 }
 
-static int tegra_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
-				int where, int size, u32 *value)
-{
-	void __iomem *addr;
-
-	addr = tegra_pcie_conf_address(bus, devfn, where);
-	if (!addr) {
-		*value = 0xffffffff;
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	}
-
-	*value = readl(addr);
-
-	if (size == 1)
-		*value = (*value >> (8 * (where & 3))) & 0xff;
-	else if (size == 2)
-		*value = (*value >> (8 * (where & 3))) & 0xffff;
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int tegra_pcie_write_conf(struct pci_bus *bus, unsigned int devfn,
-				 int where, int size, u32 value)
-{
-	void __iomem *addr;
-	u32 mask, tmp;
-
-	addr = tegra_pcie_conf_address(bus, devfn, where);
-	if (!addr)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	if (size == 4) {
-		writel(value, addr);
-		return PCIBIOS_SUCCESSFUL;
-	}
-
-	if (size == 2)
-		mask = ~(0xffff << ((where & 0x3) * 8));
-	else if (size == 1)
-		mask = ~(0xff << ((where & 0x3) * 8));
-	else
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-
-	tmp = readl(addr) & mask;
-	tmp |= value << ((where & 0x3) * 8);
-	writel(tmp, addr);
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
 static struct pci_ops tegra_pcie_ops = {
-	.read = tegra_pcie_read_conf,
-	.write = tegra_pcie_write_conf,
+	.map_bus = tegra_pcie_conf_address,
+	.read = pci_generic_config_read32,
+	.write = pci_generic_config_write32,
 };
 
 static unsigned long tegra_pcie_port_get_pex_ctrl(struct tegra_pcie_port *port)
-- 
2.1.0

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