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Diffstat (limited to 'target/linux/ar71xx/patches-3.8/017-MIPS-pci-ar724x-use-dynamically-allocated-PCI-contro.patch')
-rw-r--r--target/linux/ar71xx/patches-3.8/017-MIPS-pci-ar724x-use-dynamically-allocated-PCI-contro.patch321
1 files changed, 321 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.8/017-MIPS-pci-ar724x-use-dynamically-allocated-PCI-contro.patch b/target/linux/ar71xx/patches-3.8/017-MIPS-pci-ar724x-use-dynamically-allocated-PCI-contro.patch
new file mode 100644
index 0000000000..a960cb3087
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.8/017-MIPS-pci-ar724x-use-dynamically-allocated-PCI-contro.patch
@@ -0,0 +1,321 @@
+From 21b3cafae425cf2e317a22292a9a5773ff0e2e5e Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <juhosg@openwrt.org>
+Date: Sun, 3 Feb 2013 09:58:38 +0000
+Subject: [PATCH] MIPS: pci-ar724x: use dynamically allocated PCI controller
+ structure
+
+commit 908339ef25b1d5e80f1c6fab22b9958174708b4a upstream.
+
+The current code uses static variables to store the
+PCI controller specific data. This works if the system
+contains one PCI controller only, however it becomes
+impractical when multiple PCI controllers are present.
+
+Move the variables into a dynamically allocated controller
+specific structure, and use that instead of the static
+variables.
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Patchwork: http://patchwork.linux-mips.org/patch/4912/
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/pci/pci-ar724x.c | 129 ++++++++++++++++++++++++++++----------------
+ 1 file changed, 82 insertions(+), 47 deletions(-)
+
+--- a/arch/mips/pci/pci-ar724x.c
++++ b/arch/mips/pci/pci-ar724x.c
+@@ -9,6 +9,7 @@
+ * by the Free Software Foundation.
+ */
+
++#include <linux/spinlock.h>
+ #include <linux/irq.h>
+ #include <linux/pci.h>
+ #include <linux/module.h>
+@@ -28,38 +29,56 @@
+
+ #define AR7240_BAR0_WAR_VALUE 0xffff
+
+-static DEFINE_SPINLOCK(ar724x_pci_lock);
+-static void __iomem *ar724x_pci_devcfg_base;
+-static void __iomem *ar724x_pci_ctrl_base;
+-
+-static u32 ar724x_pci_bar0_value;
+-static bool ar724x_pci_bar0_is_cached;
+-static bool ar724x_pci_link_up;
++struct ar724x_pci_controller {
++ void __iomem *devcfg_base;
++ void __iomem *ctrl_base;
+
+-static inline bool ar724x_pci_check_link(void)
++ int irq;
++
++ bool link_up;
++ bool bar0_is_cached;
++ u32 bar0_value;
++
++ spinlock_t lock;
++
++ struct pci_controller pci_controller;
++};
++
++static inline bool ar724x_pci_check_link(struct ar724x_pci_controller *apc)
+ {
+ u32 reset;
+
+- reset = __raw_readl(ar724x_pci_ctrl_base + AR724X_PCI_REG_RESET);
++ reset = __raw_readl(apc->ctrl_base + AR724X_PCI_REG_RESET);
+ return reset & AR724X_PCI_RESET_LINK_UP;
+ }
+
++static inline struct ar724x_pci_controller *
++pci_bus_to_ar724x_controller(struct pci_bus *bus)
++{
++ struct pci_controller *hose;
++
++ hose = (struct pci_controller *) bus->sysdata;
++ return container_of(hose, struct ar724x_pci_controller, pci_controller);
++}
++
+ static int ar724x_pci_read(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, uint32_t *value)
+ {
++ struct ar724x_pci_controller *apc;
+ unsigned long flags;
+ void __iomem *base;
+ u32 data;
+
+- if (!ar724x_pci_link_up)
++ apc = pci_bus_to_ar724x_controller(bus);
++ if (!apc->link_up)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (devfn)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+- base = ar724x_pci_devcfg_base;
++ base = apc->devcfg_base;
+
+- spin_lock_irqsave(&ar724x_pci_lock, flags);
++ spin_lock_irqsave(&apc->lock, flags);
+ data = __raw_readl(base + (where & ~3));
+
+ switch (size) {
+@@ -78,17 +97,17 @@ static int ar724x_pci_read(struct pci_bu
+ case 4:
+ break;
+ default:
+- spin_unlock_irqrestore(&ar724x_pci_lock, flags);
++ spin_unlock_irqrestore(&apc->lock, flags);
+
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+
+- spin_unlock_irqrestore(&ar724x_pci_lock, flags);
++ spin_unlock_irqrestore(&apc->lock, flags);
+
+ if (where == PCI_BASE_ADDRESS_0 && size == 4 &&
+- ar724x_pci_bar0_is_cached) {
++ apc->bar0_is_cached) {
+ /* use the cached value */
+- *value = ar724x_pci_bar0_value;
++ *value = apc->bar0_value;
+ } else {
+ *value = data;
+ }
+@@ -99,12 +118,14 @@ static int ar724x_pci_read(struct pci_bu
+ static int ar724x_pci_write(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, uint32_t value)
+ {
++ struct ar724x_pci_controller *apc;
+ unsigned long flags;
+ void __iomem *base;
+ u32 data;
+ int s;
+
+- if (!ar724x_pci_link_up)
++ apc = pci_bus_to_ar724x_controller(bus);
++ if (!apc->link_up)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (devfn)
+@@ -122,18 +143,18 @@ static int ar724x_pci_write(struct pci_b
+ * BAR0 register in order to make the device memory
+ * accessible.
+ */
+- ar724x_pci_bar0_is_cached = true;
+- ar724x_pci_bar0_value = value;
++ apc->bar0_is_cached = true;
++ apc->bar0_value = value;
+
+ value = AR7240_BAR0_WAR_VALUE;
+ } else {
+- ar724x_pci_bar0_is_cached = false;
++ apc->bar0_is_cached = false;
+ }
+ }
+
+- base = ar724x_pci_devcfg_base;
++ base = apc->devcfg_base;
+
+- spin_lock_irqsave(&ar724x_pci_lock, flags);
++ spin_lock_irqsave(&apc->lock, flags);
+ data = __raw_readl(base + (where & ~3));
+
+ switch (size) {
+@@ -151,7 +172,7 @@ static int ar724x_pci_write(struct pci_b
+ data = value;
+ break;
+ default:
+- spin_unlock_irqrestore(&ar724x_pci_lock, flags);
++ spin_unlock_irqrestore(&apc->lock, flags);
+
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+@@ -159,7 +180,7 @@ static int ar724x_pci_write(struct pci_b
+ __raw_writel(data, base + (where & ~3));
+ /* flush write */
+ __raw_readl(base + (where & ~3));
+- spin_unlock_irqrestore(&ar724x_pci_lock, flags);
++ spin_unlock_irqrestore(&apc->lock, flags);
+
+ return PCIBIOS_SUCCESSFUL;
+ }
+@@ -183,18 +204,14 @@ static struct resource ar724x_mem_resour
+ .flags = IORESOURCE_MEM,
+ };
+
+-static struct pci_controller ar724x_pci_controller = {
+- .pci_ops = &ar724x_pci_ops,
+- .io_resource = &ar724x_io_resource,
+- .mem_resource = &ar724x_mem_resource,
+-};
+-
+ static void ar724x_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
+ {
++ struct ar724x_pci_controller *apc;
+ void __iomem *base;
+ u32 pending;
+
+- base = ar724x_pci_ctrl_base;
++ apc = irq_get_handler_data(irq);
++ base = apc->ctrl_base;
+
+ pending = __raw_readl(base + AR724X_PCI_REG_INT_STATUS) &
+ __raw_readl(base + AR724X_PCI_REG_INT_MASK);
+@@ -208,10 +225,12 @@ static void ar724x_pci_irq_handler(unsig
+
+ static void ar724x_pci_irq_unmask(struct irq_data *d)
+ {
++ struct ar724x_pci_controller *apc;
+ void __iomem *base;
+ u32 t;
+
+- base = ar724x_pci_ctrl_base;
++ apc = irq_data_get_irq_chip_data(d);
++ base = apc->ctrl_base;
+
+ switch (d->irq) {
+ case ATH79_PCI_IRQ(0):
+@@ -225,10 +244,12 @@ static void ar724x_pci_irq_unmask(struct
+
+ static void ar724x_pci_irq_mask(struct irq_data *d)
+ {
++ struct ar724x_pci_controller *apc;
+ void __iomem *base;
+ u32 t;
+
+- base = ar724x_pci_ctrl_base;
++ apc = irq_data_get_irq_chip_data(d);
++ base = apc->ctrl_base;
+
+ switch (d->irq) {
+ case ATH79_PCI_IRQ(0):
+@@ -255,12 +276,12 @@ static struct irq_chip ar724x_pci_irq_ch
+ .irq_mask_ack = ar724x_pci_irq_mask,
+ };
+
+-static void ar724x_pci_irq_init(int irq)
++static void ar724x_pci_irq_init(struct ar724x_pci_controller *apc)
+ {
+ void __iomem *base;
+ int i;
+
+- base = ar724x_pci_ctrl_base;
++ base = apc->ctrl_base;
+
+ __raw_writel(0, base + AR724X_PCI_REG_INT_MASK);
+ __raw_writel(0, base + AR724X_PCI_REG_INT_STATUS);
+@@ -268,45 +289,59 @@ static void ar724x_pci_irq_init(int irq)
+ BUILD_BUG_ON(ATH79_PCI_IRQ_COUNT < AR724X_PCI_IRQ_COUNT);
+
+ for (i = ATH79_PCI_IRQ_BASE;
+- i < ATH79_PCI_IRQ_BASE + AR724X_PCI_IRQ_COUNT; i++)
++ i < ATH79_PCI_IRQ_BASE + AR724X_PCI_IRQ_COUNT; i++) {
+ irq_set_chip_and_handler(i, &ar724x_pci_irq_chip,
+ handle_level_irq);
++ irq_set_chip_data(i, apc);
++ }
+
+- irq_set_chained_handler(irq, ar724x_pci_irq_handler);
++ irq_set_handler_data(apc->irq, apc);
++ irq_set_chained_handler(apc->irq, ar724x_pci_irq_handler);
+ }
+
+ static int ar724x_pci_probe(struct platform_device *pdev)
+ {
++ struct ar724x_pci_controller *apc;
+ struct resource *res;
+- int irq;
++
++ apc = devm_kzalloc(&pdev->dev, sizeof(struct ar724x_pci_controller),
++ GFP_KERNEL);
++ if (!apc)
++ return -ENOMEM;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl_base");
+ if (!res)
+ return -EINVAL;
+
+- ar724x_pci_ctrl_base = devm_request_and_ioremap(&pdev->dev, res);
+- if (ar724x_pci_ctrl_base == NULL)
++ apc->ctrl_base = devm_request_and_ioremap(&pdev->dev, res);
++ if (apc->ctrl_base == NULL)
+ return -EBUSY;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg_base");
+ if (!res)
+ return -EINVAL;
+
+- ar724x_pci_devcfg_base = devm_request_and_ioremap(&pdev->dev, res);
+- if (!ar724x_pci_devcfg_base)
++ apc->devcfg_base = devm_request_and_ioremap(&pdev->dev, res);
++ if (!apc->devcfg_base)
+ return -EBUSY;
+
+- irq = platform_get_irq(pdev, 0);
+- if (irq < 0)
++ apc->irq = platform_get_irq(pdev, 0);
++ if (apc->irq < 0)
+ return -EINVAL;
+
+- ar724x_pci_link_up = ar724x_pci_check_link();
+- if (!ar724x_pci_link_up)
++ spin_lock_init(&apc->lock);
++
++ apc->pci_controller.pci_ops = &ar724x_pci_ops;
++ apc->pci_controller.io_resource = &ar724x_io_resource;
++ apc->pci_controller.mem_resource = &ar724x_mem_resource;
++
++ apc->link_up = ar724x_pci_check_link(apc);
++ if (!apc->link_up)
+ dev_warn(&pdev->dev, "PCIe link is down\n");
+
+- ar724x_pci_irq_init(irq);
++ ar724x_pci_irq_init(apc);
+
+- register_pci_controller(&ar724x_pci_controller);
++ register_pci_controller(&apc->pci_controller);
+
+ return 0;
+ }
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