imx6: update PCIe driver

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Luka Perkov <luka@openwrt.org>

SVN-Revision: 38080

1 files changed, 201 insertions, 0 deletions

diff --git a/target/linux/imx6/patches-3.10/0009-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch b/target/linux/imx6/patches-3.10/0009-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch
new file mode 100644
index 0000000000..1ee8b4c1bf
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0009-of-pci-Provide-support-for-parsing-PCI-DT-ranges-pro.patch
@@ -0,0 +1,201 @@
+From: Andrew Murray <Andrew.Murray@arm.com>
+Subject: [PATCH] of/pci: Provide support for parsing PCI DT ranges property
+
+This patch factors out common implementation patterns to reduce overall kernel
+code and provide a means for host bridge drivers to directly obtain struct
+resources from the DT's ranges property without relying on architecture specific
+DT handling. This will make it easier to write archiecture independent host bridge
+drivers and mitigate against further duplication of DT parsing code.
+
+This patch can be used in the following way:
+
+	struct of_pci_range_parser parser;
+	struct of_pci_range range;
+
+	if (of_pci_range_parser_init(&parser, np))
+		; //no ranges property
+
+	for_each_of_pci_range(&parser, &range) {
+
+		/*
+			directly access properties of the address range, e.g.:
+			range.pci_space, range.pci_addr, range.cpu_addr,
+			range.size, range.flags
+
+			alternatively obtain a struct resource, e.g.:
+			struct resource res;
+			of_pci_range_to_resource(&range, np, &res);
+		*/
+	}
+
+Additionally the implementation takes care of adjacent ranges and merges them
+into a single range (as was the case with powerpc and microblaze).
+
+Signed-off-by: Andrew Murray <Andrew.Murray@arm.com>
+Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Reviewed-by: Rob Herring <rob.herring@calxeda.com>
+Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Tested-by: Linus Walleij <linus.walleij@linaro.org>
+Tested-by: Jingoo Han <jg1.han@samsung.com>
+Acked-by: Grant Likely <grant.likely@secretlab.ca>
+Signed-off-by: Jason Cooper <jason@lakedaemon.net>
+---
+ drivers/of/address.c       | 67 ++++++++++++++++++++++++++++++++++++++++++++++
+ include/linux/of_address.h | 48 +++++++++++++++++++++++++++++++++
+ 2 files changed, 115 insertions(+)
+
+diff --git a/drivers/of/address.c b/drivers/of/address.c
+index 04da786..fdd0636 100644
+--- a/drivers/of/address.c
++++ b/drivers/of/address.c
+@@ -227,6 +227,73 @@ int of_pci_address_to_resource(struct device_node *dev, int bar,
+ 	return __of_address_to_resource(dev, addrp, size, flags, NULL, r);
+ }
+ EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
++
++int of_pci_range_parser_init(struct of_pci_range_parser *parser,
++				struct device_node *node)
++{
++	const int na = 3, ns = 2;
++	int rlen;
++
++	parser->node = node;
++	parser->pna = of_n_addr_cells(node);
++	parser->np = parser->pna + na + ns;
++
++	parser->range = of_get_property(node, "ranges", &rlen);
++	if (parser->range == NULL)
++		return -ENOENT;
++
++	parser->end = parser->range + rlen / sizeof(__be32);
++
++	return 0;
++}
++EXPORT_SYMBOL_GPL(of_pci_range_parser_init);
++
++struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
++						struct of_pci_range *range)
++{
++	const int na = 3, ns = 2;
++
++	if (!range)
++		return NULL;
++
++	if (!parser->range || parser->range + parser->np > parser->end)
++		return NULL;
++
++	range->pci_space = parser->range[0];
++	range->flags = of_bus_pci_get_flags(parser->range);
++	range->pci_addr = of_read_number(parser->range + 1, ns);
++	range->cpu_addr = of_translate_address(parser->node,
++				parser->range + na);
++	range->size = of_read_number(parser->range + parser->pna + na, ns);
++
++	parser->range += parser->np;
++
++	/* Now consume following elements while they are contiguous */
++	while (parser->range + parser->np <= parser->end) {
++		u32 flags, pci_space;
++		u64 pci_addr, cpu_addr, size;
++
++		pci_space = be32_to_cpup(parser->range);
++		flags = of_bus_pci_get_flags(parser->range);
++		pci_addr = of_read_number(parser->range + 1, ns);
++		cpu_addr = of_translate_address(parser->node,
++				parser->range + na);
++		size = of_read_number(parser->range + parser->pna + na, ns);
++
++		if (flags != range->flags)
++			break;
++		if (pci_addr != range->pci_addr + range->size ||
++		    cpu_addr != range->cpu_addr + range->size)
++			break;
++
++		range->size += size;
++		parser->range += parser->np;
++	}
++
++	return range;
++}
++EXPORT_SYMBOL_GPL(of_pci_range_parser_one);
++
+ #endif /* CONFIG_PCI */
+ 
+ /*
+diff --git a/include/linux/of_address.h b/include/linux/of_address.h
+index 0506eb5..4c2e6f2 100644
+--- a/include/linux/of_address.h
++++ b/include/linux/of_address.h
+@@ -4,6 +4,36 @@
+ #include <linux/errno.h>
+ #include <linux/of.h>
+ 
++struct of_pci_range_parser {
++	struct device_node *node;
++	const __be32 *range;
++	const __be32 *end;
++	int np;
++	int pna;
++};
++
++struct of_pci_range {
++	u32 pci_space;
++	u64 pci_addr;
++	u64 cpu_addr;
++	u64 size;
++	u32 flags;
++};
++
++#define for_each_of_pci_range(parser, range) \
++	for (; of_pci_range_parser_one(parser, range);)
++
++static inline void of_pci_range_to_resource(struct of_pci_range *range,
++					    struct device_node *np,
++					    struct resource *res)
++{
++	res->flags = range->flags;
++	res->start = range->cpu_addr;
++	res->end = range->cpu_addr + range->size - 1;
++	res->parent = res->child = res->sibling = NULL;
++	res->name = np->full_name;
++}
++
+ #ifdef CONFIG_OF_ADDRESS
+ extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
+ extern bool of_can_translate_address(struct device_node *dev);
+@@ -27,6 +57,11 @@ static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
+ #define pci_address_to_pio pci_address_to_pio
+ #endif
+ 
++extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
++			struct device_node *node);
++extern struct of_pci_range *of_pci_range_parser_one(
++					struct of_pci_range_parser *parser,
++					struct of_pci_range *range);
+ #else /* CONFIG_OF_ADDRESS */
+ #ifndef of_address_to_resource
+ static inline int of_address_to_resource(struct device_node *dev, int index,
+@@ -53,6 +88,19 @@ static inline const __be32 *of_get_address(struct device_node *dev, int index,
+ {
+ 	return NULL;
+ }
++
++static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
++			struct device_node *node)
++{
++	return -1;
++}
++
++static inline struct of_pci_range *of_pci_range_parser_one(
++					struct of_pci_range_parser *parser,
++					struct of_pci_range *range)
++{
++	return NULL;
++}
+ #endif /* CONFIG_OF_ADDRESS */
+ 
+ 
+-- 
+1.8.4
+