linux-kernel - [PATCH v5 1/5] PCI: designware: add rd[wr]_other

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Date:	Wed, 16 Jul 2014 12:38:02 -0400
From:	Murali Karicheri <m-karicheri2@...com>
To:	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	Murali Karicheri <m-karicheri2@...com>,
	Russell King <linux@....linux.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Pratyush Anand <pratyush.anand@...com>,
	Richard Zhu <r65037@...escale.com>,
	Kishon Vijay Abraham I <kishon@...com>,
	Marek Vasut <marex@...x.de>, Arnd Bergmann <arnd@...db.de>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Randy Dunlap <rdunlap@...radead.org>
Subject: [PATCH v5 1/5] PCI: designware: add rd[wr]_other_conf API

v3.65 version of the designware h/w, requires application space
registers to be configured to access the remote EP config space.
To support this, add rd[wr]_other_conf API in the pcie_host_opts

Signed-off-by: Murali Karicheri <m-karicheri2@...com>
Acked-by: Mohit Kumar <mohit.kumar@...com>
Acked-by: Jingoo Han <jg1.han@...sung.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>

CC: Russell King <linux@....linux.org.uk>
CC: Grant Likely <grant.likely@...aro.org>
CC: Rob Herring <robh+dt@...nel.org>
CC: Bjorn Helgaas <bhelgaas@...gle.com>
CC: Pratyush Anand <pratyush.anand@...com>
CC: Richard Zhu <r65037@...escale.com>
CC: Kishon Vijay Abraham I <kishon@...com>
CC: Marek Vasut <marex@...x.de>
CC: Arnd Bergmann <arnd@...db.de>
CC: Pawel Moll <pawel.moll@....com>
CC: Mark Rutland <mark.rutland@....com>
CC: Ian Campbell <ijc+devicetree@...lion.org.uk>
CC: Kumar Gala <galak@...eaurora.org>
CC: Randy Dunlap <rdunlap@...radead.org>
CC: Grant Likely <grant.likely@...aro.org> 
---
 drivers/pci/host/pcie-designware.c |   12 ++++++++++--
 drivers/pci/host/pcie-designware.h |    4 ++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 1eaf4df..d8f3af7 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -656,7 +656,11 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
 	}
 
 	if (bus->number != pp->root_bus_nr)
-		ret = dw_pcie_rd_other_conf(pp, bus, devfn,
+		if (pp->ops->rd_other_conf)
+			ret = pp->ops->rd_other_conf(pp, bus, devfn,
+						where, size, val);
+		else
+			ret = dw_pcie_rd_other_conf(pp, bus, devfn,
 						where, size, val);
 	else
 		ret = dw_pcie_rd_own_conf(pp, where, size, val);
@@ -679,7 +683,11 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
 		return PCIBIOS_DEVICE_NOT_FOUND;
 
 	if (bus->number != pp->root_bus_nr)
-		ret = dw_pcie_wr_other_conf(pp, bus, devfn,
+		if (pp->ops->wr_other_conf)
+			ret = pp->ops->wr_other_conf(pp, bus, devfn,
+						where, size, val);
+		else
+			ret = dw_pcie_wr_other_conf(pp, bus, devfn,
 						where, size, val);
 	else
 		ret = dw_pcie_wr_own_conf(pp, where, size, val);
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index 77f592f..8121901 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -61,6 +61,10 @@ struct pcie_host_ops {
 			u32 val, void __iomem *dbi_base);
 	int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
 	int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
+	int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
+			unsigned int devfn, int where, int size, u32 *val);
+	int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
+			unsigned int devfn, int where, int size, u32 val);
 	int (*link_up)(struct pcie_port *pp);
 	void (*host_init)(struct pcie_port *pp);
 };
-- 
1.7.9.5

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