diff options
Diffstat (limited to 'target/linux/ath79/patches-4.14/0018-MIPS-pci-ar71xx-convert-to-OF.patch')
| -rw-r--r-- | target/linux/ath79/patches-4.14/0018-MIPS-pci-ar71xx-convert-to-OF.patch | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/target/linux/ath79/patches-4.14/0018-MIPS-pci-ar71xx-convert-to-OF.patch b/target/linux/ath79/patches-4.14/0018-MIPS-pci-ar71xx-convert-to-OF.patch new file mode 100644 index 0000000000..91796a12f0 --- /dev/null +++ b/target/linux/ath79/patches-4.14/0018-MIPS-pci-ar71xx-convert-to-OF.patch @@ -0,0 +1,202 @@ +From 1855ab6b1d27f5b38a648baf57ff6a534afec26d Mon Sep 17 00:00:00 2001 +From: John Crispin <john@phrozen.org> +Date: Sat, 23 Jun 2018 15:07:23 +0200 +Subject: [PATCH 18/33] MIPS: pci-ar71xx: convert to OF + +With the ath79 target getting converted to pure OF, we can drop all the +platform data code and add the missing OF bits to the driver. We also add +a irq domain for the PCI/e controllers cascade, thus making it usable from +dts files. + +Signed-off-by: John Crispin <john@phrozen.org> +--- + arch/mips/pci/pci-ar71xx.c | 82 +++++++++++++++++++++++----------------------- + 1 file changed, 41 insertions(+), 41 deletions(-) + +--- a/arch/mips/pci/pci-ar71xx.c ++++ b/arch/mips/pci/pci-ar71xx.c +@@ -18,8 +18,11 @@ + #include <linux/pci.h> + #include <linux/pci_regs.h> + #include <linux/interrupt.h> ++#include <linux/irqchip/chained_irq.h> + #include <linux/init.h> + #include <linux/platform_device.h> ++#include <linux/of_irq.h> ++#include <linux/of_pci.h> + + #include <asm/mach-ath79/ar71xx_regs.h> + #include <asm/mach-ath79/ath79.h> +@@ -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 +299,31 @@ 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 +340,11 @@ 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 +365,6 @@ 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 +377,11 @@ 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 +392,7 @@ static struct platform_driver ar71xx_pci + .probe = ar71xx_pci_probe, + .driver = { + .name = "ar71xx-pci", ++ .of_match_table = of_match_ptr(ar71xx_pci_ids), + }, + }; + |