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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.patch165
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