From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001 From: James <> Date: Wed, 4 Nov 2015 11:49:21 +0000 Subject: trunk-47381 --- .../patches-3.18/110-pci_isolated_interrupts.patch | 188 +++++++++++++++++++++ 1 file changed, 188 insertions(+) create mode 100644 target/linux/cns3xxx/patches-3.18/110-pci_isolated_interrupts.patch (limited to 'target/linux/cns3xxx/patches-3.18/110-pci_isolated_interrupts.patch') diff --git a/target/linux/cns3xxx/patches-3.18/110-pci_isolated_interrupts.patch b/target/linux/cns3xxx/patches-3.18/110-pci_isolated_interrupts.patch new file mode 100644 index 0000000..b7e07ff --- /dev/null +++ b/target/linux/cns3xxx/patches-3.18/110-pci_isolated_interrupts.patch @@ -0,0 +1,188 @@ +--- a/arch/arm/mach-cns3xxx/laguna.c ++++ b/arch/arm/mach-cns3xxx/laguna.c +@@ -21,6 +21,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -872,6 +873,47 @@ static int laguna_register_gpio(struct g + return ret; + } + ++/* allow disabling of external isolated PCIe IRQs */ ++static int cns3xxx_pciextirq = 1; ++static int __init cns3xxx_pciextirq_disable(char *s) ++{ ++ cns3xxx_pciextirq = 0; ++ return 1; ++} ++__setup("noextirq", cns3xxx_pciextirq_disable); ++ ++static int __init laguna_pcie_init_irq(void) ++{ ++ u32 __iomem *mem = (void __iomem *)(CNS3XXX_GPIOB_BASE_VIRT + 0x0004); ++ u32 reg = (__raw_readl(mem) >> 26) & 0xf; ++ int irqs[] = { ++ IRQ_CNS3XXX_EXTERNAL_PIN0, ++ IRQ_CNS3XXX_EXTERNAL_PIN1, ++ IRQ_CNS3XXX_EXTERNAL_PIN2, ++ 154, ++ }; ++ ++ if (!machine_is_gw2388()) ++ return 0; ++ ++ /* Verify GPIOB[26:29] == 0001b indicating support for ext irqs */ ++ if (cns3xxx_pciextirq && reg != 1) ++ cns3xxx_pciextirq = 0; ++ ++ if (cns3xxx_pciextirq) { ++ printk("laguna: using isolated PCI interrupts:" ++ " irq%d/irq%d/irq%d/irq%d\n", ++ irqs[0], irqs[1], irqs[2], irqs[3]); ++ cns3xxx_pcie_set_irqs(0, irqs); ++ } else { ++ printk("laguna: using shared PCI interrupts: irq%d\n", ++ IRQ_CNS3XXX_PCIE0_DEVICE); ++ } ++ ++ return 0; ++} ++subsys_initcall(laguna_pcie_init_irq); ++ + static int __init laguna_model_setup(void) + { + u32 __iomem *mem; +@@ -883,8 +925,33 @@ static int __init laguna_model_setup(voi + printk("Running on Gateworks Laguna %s\n", laguna_info.model); + cns3xxx_gpio_init( 0, 32, CNS3XXX_GPIOA_BASE_VIRT, IRQ_CNS3XXX_GPIOA, + NR_IRQS_CNS3XXX); +- cns3xxx_gpio_init(32, 32, CNS3XXX_GPIOB_BASE_VIRT, IRQ_CNS3XXX_GPIOB, +- NR_IRQS_CNS3XXX + 32); ++ ++ /* ++ * If pcie external interrupts are supported and desired ++ * configure IRQ types and configure pin function. ++ * Note that cns3xxx_pciextirq is enabled by default, but can be ++ * unset via the 'noextirq' kernel param or by laguna_pcie_init() if ++ * the baseboard model does not support this hardware feature. ++ */ ++ if (cns3xxx_pciextirq) { ++ mem = (void __iomem *)(CNS3XXX_MISC_BASE_VIRT + 0x0018); ++ reg = __raw_readl(mem); ++ /* GPIO26 is gpio, EXT_INT[0:2] not gpio func */ ++ reg &= ~0x3c000000; ++ reg |= 0x38000000; ++ __raw_writel(reg, mem); ++ ++ cns3xxx_gpio_init(32, 32, CNS3XXX_GPIOB_BASE_VIRT, ++ IRQ_CNS3XXX_GPIOB, NR_IRQS_CNS3XXX + 32); ++ ++ irq_set_irq_type(154, IRQ_TYPE_LEVEL_LOW); ++ irq_set_irq_type(93, IRQ_TYPE_LEVEL_HIGH); ++ irq_set_irq_type(94, IRQ_TYPE_LEVEL_HIGH); ++ irq_set_irq_type(95, IRQ_TYPE_LEVEL_HIGH); ++ } else { ++ cns3xxx_gpio_init(32, 32, CNS3XXX_GPIOB_BASE_VIRT, ++ IRQ_CNS3XXX_GPIOB, NR_IRQS_CNS3XXX + 32); ++ } + + if (strncmp(laguna_info.model, "GW", 2) == 0) { + if (laguna_info.config_bitmap & ETH0_LOAD) +--- a/arch/arm/mach-cns3xxx/pcie.c ++++ b/arch/arm/mach-cns3xxx/pcie.c +@@ -18,6 +18,7 @@ + #include + #include + #include ++#include + #include + #include + #include "cns3xxx.h" +@@ -27,7 +28,7 @@ struct cns3xxx_pcie { + void __iomem *host_regs; /* PCI config registers for host bridge */ + void __iomem *cfg0_regs; /* PCI Type 0 config registers */ + void __iomem *cfg1_regs; /* PCI Type 1 config registers */ +- unsigned int irqs[2]; ++ unsigned int irqs[5]; + struct resource res_io; + struct resource res_mem; + struct hw_pci hw_pci; +@@ -97,7 +98,7 @@ static inline int check_master_abort(str + void __iomem *host_base; + u32 sreg, ereg; + +- host_base = (void __iomem *) cnspci->cfg_bases[CNS3XXX_HOST_TYPE].virtual; ++ host_base = (void __iomem *) cnspci->host_regs; + sreg = __raw_readw(host_base + 0x6) & 0xF900; + ereg = __raw_readl(host_base + 0x104); // Uncorrectable Error Status Reg + +@@ -251,7 +252,7 @@ static struct pci_ops cns3xxx_pcie_ops = + static int cns3xxx_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) + { + struct cns3xxx_pcie *cnspci = pdev_to_cnspci(dev); +- int irq = cnspci->irqs[!!dev->bus->number]; ++ int irq = cnspci->irqs[!!dev->bus->number + pin - 1]; + + pr_info("PCIe map irq: %04d:%02x:%02x.%02x slot %d, pin %d, irq: %d\n", + pci_domain_nr(dev->bus), dev->bus->number, PCI_SLOT(dev->devfn), +@@ -277,7 +278,12 @@ static struct cns3xxx_pcie cns3xxx_pcie[ + .end = CNS3XXX_PCIE0_HOST_BASE - 1, /* 176 MiB */ + .flags = IORESOURCE_MEM, + }, +- .irqs = { IRQ_CNS3XXX_PCIE0_RC, IRQ_CNS3XXX_PCIE0_DEVICE, }, ++ .irqs = { IRQ_CNS3XXX_PCIE0_RC, ++ IRQ_CNS3XXX_PCIE0_DEVICE, ++ IRQ_CNS3XXX_PCIE0_DEVICE, ++ IRQ_CNS3XXX_PCIE0_DEVICE, ++ IRQ_CNS3XXX_PCIE0_DEVICE, ++ }, + .hw_pci = { + .domain = 0, + .nr_controllers = 1, +@@ -302,7 +308,13 @@ static struct cns3xxx_pcie cns3xxx_pcie[ + .end = CNS3XXX_PCIE1_HOST_BASE - 1, /* 176 MiB */ + .flags = IORESOURCE_MEM, + }, +- .irqs = { IRQ_CNS3XXX_PCIE1_RC, IRQ_CNS3XXX_PCIE1_DEVICE, }, ++ .irqs = { ++ IRQ_CNS3XXX_PCIE1_RC, ++ IRQ_CNS3XXX_PCIE1_DEVICE, ++ IRQ_CNS3XXX_PCIE1_DEVICE, ++ IRQ_CNS3XXX_PCIE1_DEVICE, ++ IRQ_CNS3XXX_PCIE1_DEVICE, ++ }, + .hw_pci = { + .domain = 1, + .nr_controllers = 1, +@@ -412,6 +424,14 @@ static int cns3xxx_pcie_abort_handler(un + return 0; + } + ++void __init cns3xxx_pcie_set_irqs(int bus, int *irqs) ++{ ++ int i; ++ ++ for (i = 0; i < 4; i++) ++ cns3xxx_pcie[bus].irqs[i + 1] = irqs[i]; ++} ++ + void __init cns3xxx_pcie_init_late(void) + { + int i; +--- a/arch/arm/mach-cns3xxx/core.h ++++ b/arch/arm/mach-cns3xxx/core.h +@@ -18,8 +18,10 @@ extern void cns3xxx_timer_init(void); + + #ifdef CONFIG_PCI + extern void __init cns3xxx_pcie_init_late(void); ++extern void __init cns3xxx_pcie_set_irqs(int bus, int *irqs); + #else + static inline void __init cns3xxx_pcie_init_late(void) {} ++static inline void cns3xxx_pcie_set_irqs(int bus, int *irqs) {} + #endif + + void __init cns3xxx_map_io(void); -- cgit v1.2.3