diff options
Diffstat (limited to 'target/linux/ar71xx/patches-3.3/115-MIPS-ath79-allow-to-use-SoC-specific-PCI-IRQ-maps.patch')
| -rw-r--r-- | target/linux/ar71xx/patches-3.3/115-MIPS-ath79-allow-to-use-SoC-specific-PCI-IRQ-maps.patch | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.3/115-MIPS-ath79-allow-to-use-SoC-specific-PCI-IRQ-maps.patch b/target/linux/ar71xx/patches-3.3/115-MIPS-ath79-allow-to-use-SoC-specific-PCI-IRQ-maps.patch new file mode 100644 index 0000000000..7daaf1923b --- /dev/null +++ b/target/linux/ar71xx/patches-3.3/115-MIPS-ath79-allow-to-use-SoC-specific-PCI-IRQ-maps.patch @@ -0,0 +1,165 @@ +From fd1dd2f2c317bc0fc2c30fba440d911654bf592e Mon Sep 17 00:00:00 2001 +From: Gabor Juhos <juhosg@openwrt.org> +Date: Wed, 14 Mar 2012 10:36:11 +0100 +Subject: [PATCH 20/47] MIPS: ath79: allow to use SoC specific PCI IRQ maps + +The PCI controllers in the AR71XX and in the +AR724X SoCs are different, and both of them +uses different IRQ wiring. + +The patch modifies the 'pcibios_map_irq' function +in order to allow to use different IRQ maps for +the different SoCs. The patch also adds a function, +which lets the board setup code to override the +default IRQ map. + +Signed-off-by: Gabor Juhos <juhosg@openwrt.org> +Cc: linux-mips@linux-mips.org +Patchwork: https://patchwork.linux-mips.org/patch/3500/ +Signed-off-by: Ralf Baechle <ralf@linux-mips.org> +--- + arch/mips/ath79/pci.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++--- + arch/mips/ath79/pci.h | 9 ++++++ + 2 files changed, 77 insertions(+), 4 deletions(-) + +--- a/arch/mips/ath79/pci.c ++++ b/arch/mips/ath79/pci.c +@@ -8,6 +8,7 @@ + * by the Free Software Foundation. + */ + ++#include <linux/init.h> + #include <linux/pci.h> + #include <asm/mach-ath79/ath79.h> + #include <asm/mach-ath79/irq.h> +@@ -15,9 +16,35 @@ + #include "pci.h" + + static int (*ath79_pci_plat_dev_init)(struct pci_dev *dev); ++static const struct ath79_pci_irq *ath79_pci_irq_map __initdata; ++static unsigned ath79_pci_nr_irqs __initdata; + static struct ar724x_pci_data *pci_data; + static int pci_data_size; + ++static const struct ath79_pci_irq ar71xx_pci_irq_map[] __initconst = { ++ { ++ .slot = 17, ++ .pin = 1, ++ .irq = ATH79_PCI_IRQ(0), ++ }, { ++ .slot = 18, ++ .pin = 1, ++ .irq = ATH79_PCI_IRQ(1), ++ }, { ++ .slot = 19, ++ .pin = 1, ++ .irq = ATH79_PCI_IRQ(2), ++ } ++}; ++ ++static const struct ath79_pci_irq ar724x_pci_irq_map[] __initconst = { ++ { ++ .slot = 0, ++ .pin = 1, ++ .irq = ATH79_PCI_IRQ(0), ++ } ++}; ++ + void ar724x_pci_add_data(struct ar724x_pci_data *data, int size) + { + pci_data = data; +@@ -26,13 +53,40 @@ void ar724x_pci_add_data(struct ar724x_p + + int __init pcibios_map_irq(const struct pci_dev *dev, uint8_t slot, uint8_t pin) + { +- unsigned int devfn = dev->devfn; + int irq = -1; ++ int i; + +- if (devfn > pci_data_size - 1) +- return irq; +- +- irq = pci_data[devfn].irq; ++ if (ath79_pci_nr_irqs == 0 || ++ ath79_pci_irq_map == NULL) { ++ if (soc_is_ar71xx()) { ++ ath79_pci_irq_map = ar71xx_pci_irq_map; ++ ath79_pci_nr_irqs = ARRAY_SIZE(ar71xx_pci_irq_map); ++ } else if (soc_is_ar724x()) { ++ ath79_pci_irq_map = ar724x_pci_irq_map; ++ ath79_pci_nr_irqs = ARRAY_SIZE(ar724x_pci_irq_map); ++ } else { ++ pr_crit("pci %s: invalid irq map\n", ++ pci_name((struct pci_dev *) dev)); ++ return irq; ++ } ++ } ++ ++ for (i = 0; i < ath79_pci_nr_irqs; i++) { ++ const struct ath79_pci_irq *entry; ++ ++ entry = &ath79_pci_irq_map[i]; ++ if (entry->slot == slot && entry->pin == pin) { ++ irq = entry->irq; ++ break; ++ } ++ } ++ ++ if (irq < 0) ++ pr_crit("pci %s: no irq found for pin %u\n", ++ pci_name((struct pci_dev *) dev), pin); ++ else ++ pr_info("pci %s: using irq %d for pin %u\n", ++ pci_name((struct pci_dev *) dev), irq, pin); + + return irq; + } +@@ -45,6 +99,13 @@ int pcibios_plat_dev_init(struct pci_dev + return 0; + } + ++void __init ath79_pci_set_irq_map(unsigned nr_irqs, ++ const struct ath79_pci_irq *map) ++{ ++ ath79_pci_nr_irqs = nr_irqs; ++ ath79_pci_irq_map = map; ++} ++ + void __init ath79_pci_set_plat_dev_init(int (*func)(struct pci_dev *dev)) + { + ath79_pci_plat_dev_init = func; +@@ -52,6 +113,9 @@ void __init ath79_pci_set_plat_dev_init( + + int __init ath79_register_pci(void) + { ++ if (soc_is_ar71xx()) ++ return ar71xx_pcibios_init(); ++ + if (soc_is_ar724x()) + return ar724x_pcibios_init(ATH79_CPU_IRQ_IP2); + +--- a/arch/mips/ath79/pci.h ++++ b/arch/mips/ath79/pci.h +@@ -15,13 +15,22 @@ struct ar724x_pci_data { + int irq; + }; + ++struct ath79_pci_irq { ++ u8 slot; ++ u8 pin; ++ int irq; ++}; ++ + void ar724x_pci_add_data(struct ar724x_pci_data *data, int size); + + #ifdef CONFIG_PCI ++void ath79_pci_set_irq_map(unsigned nr_irqs, const struct ath79_pci_irq *map); + void ath79_pci_set_plat_dev_init(int (*func)(struct pci_dev *dev)); + int ath79_register_pci(void); + #else + static inline void ++ath79_pci_set_irq_map(unsigned nr_irqs, const struct ath79_pci_irq *map) {} ++static inline void + ath79_pci_set_plat_dev_init(int (*func)(struct pci_dev *)) {} + static inline int ath79_register_pci(void) { return 0; } + #endif |