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