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author | Gabor Juhos <juhosg@openwrt.org> | 2012-07-05 08:26:45 +0000 |
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committer | Gabor Juhos <juhosg@openwrt.org> | 2012-07-05 08:26:45 +0000 |
commit | d33dfd12ab3f6a192acf50fdd6fd3c5a562c1789 (patch) | |
tree | 5067e53846904b803c53e3fbcc06d70057659998 /target/linux/ar71xx/patches-3.3/153-MIPS-pci-ar71xx-use-dynamically-allocated-PCI-contro.patch | |
parent | 4ecbabb00bf0e1a9c4408def5320cdfe37a1a3c3 (diff) | |
download | upstream-d33dfd12ab3f6a192acf50fdd6fd3c5a562c1789.tar.gz upstream-d33dfd12ab3f6a192acf50fdd6fd3c5a562c1789.tar.bz2 upstream-d33dfd12ab3f6a192acf50fdd6fd3c5a562c1789.zip |
ar71xx: refactor PCI code to allow registering multiple PCI controllers
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32605 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/patches-3.3/153-MIPS-pci-ar71xx-use-dynamically-allocated-PCI-contro.patch')
-rw-r--r-- | target/linux/ar71xx/patches-3.3/153-MIPS-pci-ar71xx-use-dynamically-allocated-PCI-contro.patch | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.3/153-MIPS-pci-ar71xx-use-dynamically-allocated-PCI-contro.patch b/target/linux/ar71xx/patches-3.3/153-MIPS-pci-ar71xx-use-dynamically-allocated-PCI-contro.patch new file mode 100644 index 0000000000..4db1fd92b3 --- /dev/null +++ b/target/linux/ar71xx/patches-3.3/153-MIPS-pci-ar71xx-use-dynamically-allocated-PCI-contro.patch @@ -0,0 +1,228 @@ +From 6c3ef689e4364dca74eaaecd72384be09e5a6bc8 Mon Sep 17 00:00:00 2001 +From: Gabor Juhos <juhosg@openwrt.org> +Date: Mon, 25 Jun 2012 09:19:08 +0200 +Subject: [PATCH 14/34] MIPS: pci-ar71xx: use dynamically allocated PCI controller structure + +Signed-off-by: Gabor Juhos <juhosg@openwrt.org> +--- + arch/mips/pci/pci-ar71xx.c | 84 +++++++++++++++++++++++++++---------------- + 1 files changed, 53 insertions(+), 31 deletions(-) + +--- a/arch/mips/pci/pci-ar71xx.c ++++ b/arch/mips/pci/pci-ar71xx.c +@@ -20,6 +20,7 @@ + #include <linux/interrupt.h> + #include <linux/module.h> + #include <linux/platform_device.h> ++#include <linux/slab.h> + + #include <asm/mach-ath79/ar71xx_regs.h> + #include <asm/mach-ath79/ath79.h> +@@ -48,8 +49,12 @@ + + #define AR71XX_PCI_IRQ_COUNT 5 + +-static DEFINE_SPINLOCK(ar71xx_pci_lock); +-static void __iomem *ar71xx_pcicfg_base; ++struct ar71xx_pci_controller { ++ void __iomem *cfg_base; ++ spinlock_t lock; ++ int irq; ++ struct pci_controller pci_ctrl; ++}; + + /* Byte lane enable bits */ + static const u8 ar71xx_pci_ble_table[4][4] = { +@@ -92,9 +97,18 @@ static inline u32 ar71xx_pci_bus_addr(st + return ret; + } + +-static int ar71xx_pci_check_error(int quiet) ++static inline struct ar71xx_pci_controller * ++pci_bus_to_ar71xx_controller(struct pci_bus *bus) + { +- void __iomem *base = ar71xx_pcicfg_base; ++ struct pci_controller *hose; ++ ++ hose = (struct pci_controller *) bus->sysdata; ++ return container_of(hose, struct ar71xx_pci_controller, pci_ctrl); ++} ++ ++static int ar71xx_pci_check_error(struct ar71xx_pci_controller *apc, int quiet) ++{ ++ void __iomem *base = apc->cfg_base; + u32 pci_err; + u32 ahb_err; + +@@ -129,9 +143,10 @@ static int ar71xx_pci_check_error(int qu + return !!(ahb_err | pci_err); + } + +-static inline void ar71xx_pci_local_write(int where, int size, u32 value) ++static inline void ar71xx_pci_local_write(struct ar71xx_pci_controller *apc, ++ int where, int size, u32 value) + { +- void __iomem *base = ar71xx_pcicfg_base; ++ void __iomem *base = apc->cfg_base; + u32 ad_cbe; + + value = value << (8 * (where & 3)); +@@ -147,7 +162,8 @@ static inline int ar71xx_pci_set_cfgaddr + unsigned int devfn, + int where, int size, u32 cmd) + { +- void __iomem *base = ar71xx_pcicfg_base; ++ struct ar71xx_pci_controller *apc = pci_bus_to_ar71xx_controller(bus); ++ void __iomem *base = apc->cfg_base; + u32 addr; + + addr = ar71xx_pci_bus_addr(bus, devfn, where); +@@ -156,13 +172,14 @@ static inline int ar71xx_pci_set_cfgaddr + __raw_writel(cmd | ar71xx_pci_get_ble(where, size, 0), + base + AR71XX_PCI_REG_CFG_CBE); + +- return ar71xx_pci_check_error(1); ++ return ar71xx_pci_check_error(apc, 1); + } + + static int ar71xx_pci_read_config(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *value) + { +- void __iomem *base = ar71xx_pcicfg_base; ++ struct ar71xx_pci_controller *apc = pci_bus_to_ar71xx_controller(bus); ++ void __iomem *base = apc->cfg_base; + unsigned long flags; + u32 data; + int err; +@@ -171,7 +188,7 @@ static int ar71xx_pci_read_config(struct + ret = PCIBIOS_SUCCESSFUL; + data = ~0; + +- spin_lock_irqsave(&ar71xx_pci_lock, flags); ++ spin_lock_irqsave(&apc->lock, flags); + + err = ar71xx_pci_set_cfgaddr(bus, devfn, where, size, + AR71XX_PCI_CFG_CMD_READ); +@@ -180,7 +197,7 @@ static int ar71xx_pci_read_config(struct + else + data = __raw_readl(base + AR71XX_PCI_REG_CFG_RDDATA); + +- spin_unlock_irqrestore(&ar71xx_pci_lock, flags); ++ spin_unlock_irqrestore(&apc->lock, flags); + + *value = (data >> (8 * (where & 3))) & ar71xx_pci_read_mask[size & 7]; + +@@ -190,7 +207,8 @@ static int ar71xx_pci_read_config(struct + static int ar71xx_pci_write_config(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 value) + { +- void __iomem *base = ar71xx_pcicfg_base; ++ struct ar71xx_pci_controller *apc = pci_bus_to_ar71xx_controller(bus); ++ void __iomem *base = apc->cfg_base; + unsigned long flags; + int err; + int ret; +@@ -198,7 +216,7 @@ static int ar71xx_pci_write_config(struc + value = value << (8 * (where & 3)); + ret = PCIBIOS_SUCCESSFUL; + +- spin_lock_irqsave(&ar71xx_pci_lock, flags); ++ spin_lock_irqsave(&apc->lock, flags); + + err = ar71xx_pci_set_cfgaddr(bus, devfn, where, size, + AR71XX_PCI_CFG_CMD_WRITE); +@@ -207,7 +225,7 @@ static int ar71xx_pci_write_config(struc + else + __raw_writel(value, base + AR71XX_PCI_REG_CFG_WRDATA); + +- spin_unlock_irqrestore(&ar71xx_pci_lock, flags); ++ spin_unlock_irqrestore(&apc->lock, flags); + + return ret; + } +@@ -231,12 +249,6 @@ static struct resource ar71xx_pci_mem_re + .flags = IORESOURCE_MEM + }; + +-static struct pci_controller ar71xx_pci_controller = { +- .pci_ops = &ar71xx_pci_ops, +- .mem_resource = &ar71xx_pci_mem_resource, +- .io_resource = &ar71xx_pci_io_resource, +-}; +- + static void ar71xx_pci_irq_handler(unsigned int irq, struct irq_desc *desc) + { + void __iomem *base = ath79_reset_base; +@@ -294,7 +306,7 @@ static struct irq_chip ar71xx_pci_irq_ch + .irq_mask_ack = ar71xx_pci_irq_mask, + }; + +-static __devinit void ar71xx_pci_irq_init(int irq) ++static __devinit void ar71xx_pci_irq_init(struct ar71xx_pci_controller *apc) + { + void __iomem *base = ath79_reset_base; + int i; +@@ -309,7 +321,7 @@ static __devinit void ar71xx_pci_irq_ini + irq_set_chip_and_handler(i, &ar71xx_pci_irq_chip, + handle_level_irq); + +- irq_set_chained_handler(irq, ar71xx_pci_irq_handler); ++ irq_set_chained_handler(apc->irq, ar71xx_pci_irq_handler); + } + + static __devinit void ar71xx_pci_reset(void) +@@ -336,20 +348,26 @@ static __devinit void ar71xx_pci_reset(v + + static int __devinit ar71xx_pci_probe(struct platform_device *pdev) + { ++ struct ar71xx_pci_controller *apc; + struct resource *res; +- int irq; + u32 t; + ++ apc = kzalloc(sizeof(struct ar71xx_pci_controller), GFP_KERNEL); ++ if (!apc) ++ return -ENOMEM; ++ ++ spin_lock_init(&apc->lock); ++ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg_base"); + if (!res) + return -EINVAL; + +- ar71xx_pcicfg_base = devm_request_and_ioremap(&pdev->dev, res); +- if (!ar71xx_pcicfg_base) ++ apc->cfg_base = devm_request_and_ioremap(&pdev->dev, res); ++ if (!apc->cfg_base) + return -ENOMEM; + +- irq = platform_get_irq(pdev, 0); +- if (irq < 0) ++ apc->irq = platform_get_irq(pdev, 0); ++ if (apc->irq < 0) + return -EINVAL; + + ar71xx_pci_reset(); +@@ -357,14 +375,18 @@ static int __devinit ar71xx_pci_probe(st + /* setup COMMAND register */ + t = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE + | PCI_COMMAND_PARITY | PCI_COMMAND_SERR | PCI_COMMAND_FAST_BACK; +- ar71xx_pci_local_write(PCI_COMMAND, 4, t); ++ ar71xx_pci_local_write(apc, PCI_COMMAND, 4, t); + + /* clear bus errors */ +- ar71xx_pci_check_error(1); ++ ar71xx_pci_check_error(apc, 1); ++ ++ ar71xx_pci_irq_init(apc); + +- ar71xx_pci_irq_init(irq); ++ apc->pci_ctrl.pci_ops = &ar71xx_pci_ops; ++ apc->pci_ctrl.mem_resource = &ar71xx_pci_mem_resource; ++ apc->pci_ctrl.io_resource = &ar71xx_pci_io_resource; + +- register_pci_controller(&ar71xx_pci_controller); ++ register_pci_controller(&apc->pci_ctrl); + + return 0; + } |