From cc5a306038b7956b5736a70696dddaaf3792df76 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Tue, 6 Mar 2018 09:22:49 +0100 Subject: [PATCH 20/27] MIPS: ath79: turn pci-ar71xx driver into a pure OF driver Signed-off-by: John Crispin --- arch/mips/pci/pci-ar71xx.c | 81 +++++++++++++++++++++++----------------------- 1 file changed, 40 insertions(+), 41 deletions(-) --- a/arch/mips/pci/pci-ar71xx.c +++ b/arch/mips/pci/pci-ar71xx.c @@ -18,8 +18,11 @@ #include #include #include +#include #include #include +#include +#include #include #include @@ -49,12 +52,13 @@ #define AR71XX_PCI_IRQ_COUNT 5 struct ar71xx_pci_controller { + struct device_node *np; void __iomem *cfg_base; int irq; - int irq_base; struct pci_controller pci_ctrl; struct resource io_res; struct resource mem_res; + struct irq_domain *domain; }; /* Byte lane enable bits */ @@ -228,29 +232,30 @@ static struct pci_ops ar71xx_pci_ops = { static void ar71xx_pci_irq_handler(struct irq_desc *desc) { - struct ar71xx_pci_controller *apc; void __iomem *base = ath79_reset_base; + struct irq_chip *chip = irq_desc_get_chip(desc); + struct ar71xx_pci_controller *apc = irq_desc_get_handler_data(desc); u32 pending; - apc = irq_desc_get_handler_data(desc); - + chained_irq_enter(chip, desc); pending = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_STATUS) & __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE); if (pending & AR71XX_PCI_INT_DEV0) - generic_handle_irq(apc->irq_base + 0); + generic_handle_irq(irq_linear_revmap(apc->domain, 1)); else if (pending & AR71XX_PCI_INT_DEV1) - generic_handle_irq(apc->irq_base + 1); + generic_handle_irq(irq_linear_revmap(apc->domain, 2)); else if (pending & AR71XX_PCI_INT_DEV2) - generic_handle_irq(apc->irq_base + 2); + generic_handle_irq(irq_linear_revmap(apc->domain, 3)); else if (pending & AR71XX_PCI_INT_CORE) - generic_handle_irq(apc->irq_base + 4); + generic_handle_irq(irq_linear_revmap(apc->domain, 4)); else spurious_interrupt(); + chained_irq_exit(chip, desc); } static void ar71xx_pci_irq_unmask(struct irq_data *d) @@ -261,7 +266,7 @@ static void ar71xx_pci_irq_unmask(struct u32 t; apc = irq_data_get_irq_chip_data(d); - irq = d->irq - apc->irq_base; + irq = irq_linear_revmap(apc->domain, d->irq); t = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE); __raw_writel(t | (1 << irq), base + AR71XX_RESET_REG_PCI_INT_ENABLE); @@ -278,7 +283,7 @@ static void ar71xx_pci_irq_mask(struct i u32 t; apc = irq_data_get_irq_chip_data(d); - irq = d->irq - apc->irq_base; + irq = irq_linear_revmap(apc->domain, d->irq); t = __raw_readl(base + AR71XX_RESET_REG_PCI_INT_ENABLE); __raw_writel(t & ~(1 << irq), base + AR71XX_RESET_REG_PCI_INT_ENABLE); @@ -294,24 +299,30 @@ static struct irq_chip ar71xx_pci_irq_ch .irq_mask_ack = ar71xx_pci_irq_mask, }; +static int ar71xx_pci_irq_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) +{ + struct ar71xx_pci_controller *apc = d->host_data; + + irq_set_chip_and_handler(irq, &ar71xx_pci_irq_chip, handle_level_irq); + irq_set_chip_data(irq, apc); + + return 0; +} + +static const struct irq_domain_ops ar71xx_pci_domain_ops = { + .xlate = irq_domain_xlate_onecell, + .map = ar71xx_pci_irq_map, +}; + static void ar71xx_pci_irq_init(struct ar71xx_pci_controller *apc) { void __iomem *base = ath79_reset_base; - int i; __raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_ENABLE); __raw_writel(0, base + AR71XX_RESET_REG_PCI_INT_STATUS); - BUILD_BUG_ON(ATH79_PCI_IRQ_COUNT < AR71XX_PCI_IRQ_COUNT); - - apc->irq_base = ATH79_PCI_IRQ_BASE; - for (i = apc->irq_base; - i < apc->irq_base + AR71XX_PCI_IRQ_COUNT; i++) { - irq_set_chip_and_handler(i, &ar71xx_pci_irq_chip, - handle_level_irq); - irq_set_chip_data(i, apc); - } - + apc->domain = irq_domain_add_linear(apc->np, AR71XX_PCI_IRQ_COUNT, + &ar71xx_pci_domain_ops, apc); irq_set_chained_handler_and_data(apc->irq, ar71xx_pci_irq_handler, apc); } @@ -328,6 +339,11 @@ static void ar71xx_pci_reset(void) mdelay(100); } +static const struct of_device_id ar71xx_pci_ids[] = { + { .compatible = "qca,ar7100-pci" }, + {}, +}; + static int ar71xx_pci_probe(struct platform_device *pdev) { struct ar71xx_pci_controller *apc; @@ -348,26 +364,6 @@ static int ar71xx_pci_probe(struct platf if (apc->irq < 0) return -EINVAL; - res = platform_get_resource_byname(pdev, IORESOURCE_IO, "io_base"); - if (!res) - return -EINVAL; - - apc->io_res.parent = res; - apc->io_res.name = "PCI IO space"; - apc->io_res.start = res->start; - apc->io_res.end = res->end; - apc->io_res.flags = IORESOURCE_IO; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem_base"); - if (!res) - return -EINVAL; - - apc->mem_res.parent = res; - apc->mem_res.name = "PCI memory space"; - apc->mem_res.start = res->start; - apc->mem_res.end = res->end; - apc->mem_res.flags = IORESOURCE_MEM; - ar71xx_pci_reset(); /* setup COMMAND register */ @@ -380,9 +376,11 @@ static int ar71xx_pci_probe(struct platf ar71xx_pci_irq_init(apc); + apc->np = pdev->dev.of_node; apc->pci_ctrl.pci_ops = &ar71xx_pci_ops; apc->pci_ctrl.mem_resource = &apc->mem_res; apc->pci_ctrl.io_resource = &apc->io_res; + pci_load_of_ranges(&apc->pci_ctrl, pdev->dev.of_node); register_pci_controller(&apc->pci_ctrl); @@ -393,6 +391,7 @@ static struct platform_driver ar71xx_pci .probe = ar71xx_pci_probe, .driver = { .name = "ar71xx-pci", + .of_match_table = of_match_ptr(ar71xx_pci_ids), }, };