--- /dev/null
+--- a/arch/mips/pci/pci-rt3883.c
++++ b/arch/mips/pci/pci-rt3883.c
+@@ -1,7 +1,7 @@
+ /*
+- * Ralink RT3883 SoC PCI support
++ * Ralink RT3662/RT3883 SoC PCI support
+ *
+- * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
++ * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+@@ -16,52 +16,82 @@
+ #include <linux/init.h>
+ #include <linux/delay.h>
+ #include <linux/interrupt.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_irq.h>
++#include <linux/of_pci.h>
++#include <linux/platform_device.h>
+
+ #include <asm/mach-ralink/rt3883.h>
+-#include <asm/mach-ralink/rt3883_regs.h>
++#include <asm/mach-ralink/ralink_regs.h>
+
+ #define RT3883_MEMORY_BASE 0x00000000
+ #define RT3883_MEMORY_SIZE 0x02000000
+
+-#define RT3883_PCI_MEM_BASE 0x20000000
+-#define RT3883_PCI_MEM_SIZE 0x10000000
+-#define RT3883_PCI_IO_BASE 0x10160000
+-#define RT3883_PCI_IO_SIZE 0x00010000
+-
+-#define RT3883_PCI_REG_PCICFG_ADDR 0x00
+-#define RT3883_PCI_REG_PCIRAW_ADDR 0x04
+-#define RT3883_PCI_REG_PCIINT_ADDR 0x08
+-#define RT3883_PCI_REG_PCIMSK_ADDR 0x0c
+-#define RT3833_PCI_PCIINT_PCIE BIT(20)
+-#define RT3833_PCI_PCIINT_PCI1 BIT(19)
+-#define RT3833_PCI_PCIINT_PCI0 BIT(18)
++#define RT3883_PCI_REG_PCICFG 0x00
++#define RT3883_PCICFG_P2P_BR_DEVNUM_M 0xf
++#define RT3883_PCICFG_P2P_BR_DEVNUM_S 16
++#define RT3883_PCICFG_PCIRST BIT(1)
++#define RT3883_PCI_REG_PCIRAW 0x04
++#define RT3883_PCI_REG_PCIINT 0x08
++#define RT3883_PCI_REG_PCIENA 0x0c
+
+-#define RT3883_PCI_REG_CONFIG_ADDR 0x20
+-#define RT3883_PCI_REG_CONFIG_DATA 0x24
++#define RT3883_PCI_REG_CFGADDR 0x20
++#define RT3883_PCI_REG_CFGDATA 0x24
+ #define RT3883_PCI_REG_MEMBASE 0x28
+ #define RT3883_PCI_REG_IOBASE 0x2c
+ #define RT3883_PCI_REG_ARBCTL 0x80
+
+ #define RT3883_PCI_REG_BASE(_x) (0x1000 + (_x) * 0x1000)
+-#define RT3883_PCI_REG_BAR0SETUP_ADDR(_x) (RT3883_PCI_REG_BASE((_x)) + 0x10)
+-#define RT3883_PCI_REG_IMBASEBAR0_ADDR(_x) (RT3883_PCI_REG_BASE((_x)) + 0x18)
++#define RT3883_PCI_REG_BAR0SETUP(_x) (RT3883_PCI_REG_BASE((_x)) + 0x10)
++#define RT3883_PCI_REG_IMBASEBAR0(_x) (RT3883_PCI_REG_BASE((_x)) + 0x18)
+ #define RT3883_PCI_REG_ID(_x) (RT3883_PCI_REG_BASE((_x)) + 0x30)
+ #define RT3883_PCI_REG_CLASS(_x) (RT3883_PCI_REG_BASE((_x)) + 0x34)
+ #define RT3883_PCI_REG_SUBID(_x) (RT3883_PCI_REG_BASE((_x)) + 0x38)
+ #define RT3883_PCI_REG_STATUS(_x) (RT3883_PCI_REG_BASE((_x)) + 0x50)
+
+-static int (*rt3883_pci_plat_dev_init)(struct pci_dev *dev);
+-static void __iomem *rt3883_pci_base;
+-static DEFINE_SPINLOCK(rt3883_pci_lock);
++#define RT3883_PCI_MODE_NONE 0
++#define RT3883_PCI_MODE_PCI BIT(0)
++#define RT3883_PCI_MODE_PCIE BIT(1)
++#define RT3883_PCI_MODE_BOTH (RT3883_PCI_MODE_PCI | RT3883_PCI_MODE_PCIE)
+
+-static inline u32 rt3883_pci_rr(unsigned reg)
++#define RT3883_PCI_IRQ_COUNT 32
++
++#define RT3883_P2P_BR_DEVNUM 1
++
++struct rt3883_pci_controller {
++ void __iomem *base;
++ spinlock_t lock;
++
++ struct irq_domain *irq_domain;
++
++ struct pci_controller pci_controller;
++ struct resource io_res;
++ struct resource mem_res;
++
++ bool pcie_ready;
++ unsigned char p2p_devnum;
++};
++
++static inline struct rt3883_pci_controller *
++pci_bus_to_rt3883_controller(struct pci_bus *bus)
+ {
+- return readl(rt3883_pci_base + reg);
++ struct pci_controller *hose;
++
++ hose = (struct pci_controller *) bus->sysdata;
++ return container_of(hose, struct rt3883_pci_controller, pci_controller);
++}
++
++static inline u32 rt3883_pci_r32(struct rt3883_pci_controller *rpc,
++ unsigned reg)
++{
++ return ioread32(rpc->base + reg);
+ }
+
+-static inline void rt3883_pci_wr(u32 val, unsigned reg)
++static inline void rt3883_pci_w32(struct rt3883_pci_controller *rpc,
++ u32 val, unsigned reg)
+ {
+- writel(val, rt3883_pci_base + reg);
++ iowrite32(val, rpc->base + reg);
+ }
+
+ static inline u32 rt3883_pci_get_cfgaddr(unsigned int bus, unsigned int slot,
+@@ -71,7 +101,8 @@ static inline u32 rt3883_pci_get_cfgaddr
+ 0x80000000);
+ }
+
+-static u32 rt3883_pci_read_u32(unsigned bus, unsigned slot,
++static u32 rt3883_pci_read_cfg32(struct rt3883_pci_controller *rpc,
++ unsigned bus, unsigned slot,
+ unsigned func, unsigned reg)
+ {
+ unsigned long flags;
+@@ -80,15 +111,16 @@ static u32 rt3883_pci_read_u32(unsigned
+
+ address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
+
+- spin_lock_irqsave(&rt3883_pci_lock, flags);
+- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
+- ret = rt3883_pci_rr(RT3883_PCI_REG_CONFIG_DATA);
+- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
++ spin_lock_irqsave(&rpc->lock, flags);
++ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++ ret = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
++ spin_unlock_irqrestore(&rpc->lock, flags);
+
+ return ret;
+ }
+
+-static void rt3883_pci_write_u32(unsigned bus, unsigned slot,
++static void rt3883_pci_write_cfg32(struct rt3883_pci_controller *rpc,
++ unsigned bus, unsigned slot,
+ unsigned func, unsigned reg, u32 val)
+ {
+ unsigned long flags;
+@@ -96,84 +128,61 @@ static void rt3883_pci_write_u32(unsigne
+
+ address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
+
+- spin_lock_irqsave(&rt3883_pci_lock, flags);
+- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
+- rt3883_pci_wr(val, RT3883_PCI_REG_CONFIG_DATA);
+- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
++ spin_lock_irqsave(&rpc->lock, flags);
++ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++ rt3883_pci_w32(rpc, val, RT3883_PCI_REG_CFGDATA);
++ spin_unlock_irqrestore(&rpc->lock, flags);
+ }
+
+ static void rt3883_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
+ {
++ struct rt3883_pci_controller *rpc;
+ u32 pending;
+
+- pending = rt3883_pci_rr(RT3883_PCI_REG_PCIINT_ADDR) &
+- rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
++ rpc = irq_get_handler_data(irq);
++
++ pending = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIINT) &
++ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
+
+ if (!pending) {
+ spurious_interrupt();
+ return;
+ }
+
+- if (pending & RT3833_PCI_PCIINT_PCI0)
+- generic_handle_irq(RT3883_PCI_IRQ_PCI0);
++ while (pending) {
++ unsigned bit = __ffs(pending);
+
+- if (pending & RT3833_PCI_PCIINT_PCI1)
+- generic_handle_irq(RT3883_PCI_IRQ_PCI1);
++ irq = irq_find_mapping(rpc->irq_domain, bit);
++ generic_handle_irq(irq);
+
+- if (pending & RT3833_PCI_PCIINT_PCIE)
+- generic_handle_irq(RT3883_PCI_IRQ_PCIE);
++ pending &= ~BIT(bit);
++ }
+ }
+
+ static void rt3883_pci_irq_unmask(struct irq_data *d)
+ {
+- int irq = d->irq;
+- u32 mask;
++ struct rt3883_pci_controller *rpc;
+ u32 t;
+
+- switch (irq) {
+- case RT3883_PCI_IRQ_PCI0:
+- mask = RT3833_PCI_PCIINT_PCI0;
+- break;
+- case RT3883_PCI_IRQ_PCI1:
+- mask = RT3833_PCI_PCIINT_PCI1;
+- break;
+- case RT3883_PCI_IRQ_PCIE:
+- mask = RT3833_PCI_PCIINT_PCIE;
+- break;
+- default:
+- BUG();
+- }
++ rpc = irq_data_get_irq_chip_data(d);
+
+- t = rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
+- rt3883_pci_wr(t | mask, RT3883_PCI_REG_PCIMSK_ADDR);
++ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
++ rt3883_pci_w32(rpc, t | BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
+ /* flush write */
+- rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
++ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
+ }
+
+ static void rt3883_pci_irq_mask(struct irq_data *d)
+ {
+- int irq = d->irq;
+- u32 mask;
++ struct rt3883_pci_controller *rpc;
+ u32 t;
+
+- switch (irq) {
+- case RT3883_PCI_IRQ_PCI0:
+- mask = RT3833_PCI_PCIINT_PCI0;
+- break;
+- case RT3883_PCI_IRQ_PCI1:
+- mask = RT3833_PCI_PCIINT_PCI1;
+- break;
+- case RT3883_PCI_IRQ_PCIE:
+- mask = RT3833_PCI_PCIINT_PCIE;
+- break;
+- default:
+- BUG();
+- }
++ rpc = irq_data_get_irq_chip_data(d);
+
+- t = rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
+- rt3883_pci_wr(t & ~mask, RT3883_PCI_REG_PCIMSK_ADDR);
++ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
++ rt3883_pci_w32(rpc, t & ~BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
+ /* flush write */
+- rt3883_pci_rr(RT3883_PCI_REG_PCIMSK_ADDR);
++ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
+ }
+
+ static struct irq_chip rt3883_pci_irq_chip = {
+@@ -183,36 +192,84 @@ static struct irq_chip rt3883_pci_irq_ch
+ .irq_mask_ack = rt3883_pci_irq_mask,
+ };
+
+-static void __init rt3883_pci_irq_init(void)
++static int rt3883_pci_irq_map(struct irq_domain *d, unsigned int irq,
++ irq_hw_number_t hw)
+ {
+- int i;
++ irq_set_chip_and_handler(irq, &rt3883_pci_irq_chip, handle_level_irq);
++ irq_set_chip_data(irq, d->host_data);
++
++ return 0;
++}
++
++static const struct irq_domain_ops rt3883_pci_irq_domain_ops = {
++ .map = rt3883_pci_irq_map,
++ .xlate = irq_domain_xlate_onecell,
++};
++
++static int rt3883_pci_irq_init(struct device *dev,
++ struct rt3883_pci_controller *rpc)
++{
++ struct device_node *np = dev->of_node;
++ struct device_node *intc_np;
++ int irq;
++ int err;
++
++ intc_np = of_get_child_by_name(np, "interrupt-controller");
++ if (!intc_np) {
++ dev_err(dev, "no %s child node found", "interrupt-controller");
++ return -ENODEV;
++ }
++
++ irq = irq_of_parse_and_map(intc_np, 0);
++ if (irq == 0) {
++ dev_err(dev, "%s has no IRQ", of_node_full_name(intc_np));
++ err = -EINVAL;
++ goto err_put_intc;
++ }
+
+ /* disable all interrupts */
+- rt3883_pci_wr(0, RT3883_PCI_REG_PCIMSK_ADDR);
++ rt3883_pci_w32(rpc, 0, RT3883_PCI_REG_PCIENA);
+
+- for (i = RT3883_PCI_IRQ_BASE;
+- i < RT3883_PCI_IRQ_BASE + RT3883_PCI_IRQ_COUNT; i++) {
+- irq_set_chip_and_handler(i, &rt3883_pci_irq_chip,
+- handle_level_irq);
++ rpc->irq_domain =
++ irq_domain_add_linear(intc_np, RT3883_PCI_IRQ_COUNT,
++ &rt3883_pci_irq_domain_ops,
++ rpc);
++ if (!rpc->irq_domain) {
++ dev_err(dev, "unable to add IRQ domain\n");
++ err = -ENODEV;
++ goto err_put_intc;
+ }
+
+- irq_set_chained_handler(RT3883_CPU_IRQ_PCI, rt3883_pci_irq_handler);
++ irq_set_handler_data(irq, rpc);
++ irq_set_chained_handler(irq, rt3883_pci_irq_handler);
++
++ return 0;
++
++err_put_intc:
++ of_node_put(intc_np);
++ return err;
+ }
+
+ static int rt3883_pci_config_read(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
+ {
++ struct rt3883_pci_controller *rpc;
+ unsigned long flags;
+ u32 address;
+ u32 data;
+
++ rpc = pci_bus_to_rt3883_controller(bus);
++
++ if (!rpc->pcie_ready && bus->number == 1)
++ return PCIBIOS_DEVICE_NOT_FOUND;
++
+ address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
+ PCI_FUNC(devfn), where);
+
+- spin_lock_irqsave(&rt3883_pci_lock, flags);
+- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
+- data = rt3883_pci_rr(RT3883_PCI_REG_CONFIG_DATA);
+- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
++ spin_lock_irqsave(&rpc->lock, flags);
++ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++ data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
++ spin_unlock_irqrestore(&rpc->lock, flags);
+
+ switch (size) {
+ case 1:
+@@ -232,16 +289,22 @@ static int rt3883_pci_config_read(struct
+ static int rt3883_pci_config_write(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
+ {
++ struct rt3883_pci_controller *rpc;
+ unsigned long flags;
+ u32 address;
+ u32 data;
+
++ rpc = pci_bus_to_rt3883_controller(bus);
++
++ if (!rpc->pcie_ready && bus->number == 1)
++ return PCIBIOS_DEVICE_NOT_FOUND;
++
+ address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
+ PCI_FUNC(devfn), where);
+
+- spin_lock_irqsave(&rt3883_pci_lock, flags);
+- rt3883_pci_wr(address, RT3883_PCI_REG_CONFIG_ADDR);
+- data = rt3883_pci_rr(RT3883_PCI_REG_CONFIG_DATA);
++ spin_lock_irqsave(&rpc->lock, flags);
++ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
++ data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
+
+ switch (size) {
+ case 1:
+@@ -257,8 +320,8 @@ static int rt3883_pci_config_write(struc
+ break;
+ }
+
+- rt3883_pci_wr(data, RT3883_PCI_REG_CONFIG_DATA);
+- spin_unlock_irqrestore(&rt3883_pci_lock, flags);
++ rt3883_pci_w32(rpc, data, RT3883_PCI_REG_CFGDATA);
++ spin_unlock_irqrestore(&rpc->lock, flags);
+
+ return PCIBIOS_SUCCESSFUL;
+ }
+@@ -268,220 +331,310 @@ static struct pci_ops rt3883_pci_ops = {
+ .write = rt3883_pci_config_write,
+ };
+
+-static struct resource rt3883_pci_mem_resource = {
+- .name = "PCI MEM space",
+- .start = RT3883_PCI_MEM_BASE,
+- .end = RT3883_PCI_MEM_BASE + RT3883_PCI_MEM_SIZE - 1,
+- .flags = IORESOURCE_MEM,
+-};
+-
+-static struct resource rt3883_pci_io_resource = {
+- .name = "PCI IO space",
+- .start = RT3883_PCI_IO_BASE,
+- .end = RT3883_PCI_IO_BASE + RT3883_PCI_IO_SIZE - 1,
+- .flags = IORESOURCE_IO,
+-};
+-
+-static struct pci_controller rt3883_pci_controller = {
+- .pci_ops = &rt3883_pci_ops,
+- .mem_resource = &rt3883_pci_mem_resource,
+- .io_resource = &rt3883_pci_io_resource,
+-};
+-
+-static void rt3883_pci_preinit(unsigned mode)
++static void rt3883_pci_preinit(struct rt3883_pci_controller *rpc, unsigned mode)
+ {
+ u32 syscfg1;
+ u32 rstctrl;
+ u32 clkcfg1;
++ u32 t;
++
++ rstctrl = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
++ syscfg1 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
++ clkcfg1 = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
+
+ if (mode & RT3883_PCI_MODE_PCIE) {
+- u32 val;
++ rstctrl |= RT3883_RSTCTRL_PCIE;
++ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
+
+- val = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
+- val &= ~(0x30);
+- val |= (2 << 4);
+- rt3883_sysc_wr(val, RT3883_SYSC_REG_SYSCFG1);
+-
+- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN0);
+- val &= ~BIT(31);
+- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN0);
+-
+- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN1);
+- val &= 0x80ffffff;
+- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN1);
+-
+- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN1);
+- val |= 0xa << 24;
+- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN1);
+-
+- val = rt3883_sysc_rr(RT3883_SYSC_REG_PCIE_CLK_GEN0);
+- val |= BIT(31);
+- rt3883_sysc_wr(val, RT3883_SYSC_REG_PCIE_CLK_GEN0);
++ /* setup PCI PAD drive mode */
++ syscfg1 &= ~(0x30);
++ syscfg1 |= (2 << 4);
++ rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
++
++ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
++ t &= ~BIT(31);
++ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
++
++ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
++ t &= 0x80ffffff;
++ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
++
++ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
++ t |= 0xa << 24;
++ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
++
++ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
++ t |= BIT(31);
++ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
+
+ msleep(50);
++
++ rstctrl &= ~RT3883_RSTCTRL_PCIE;
++ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
+ }
+
+- syscfg1 = rt3883_sysc_rr(RT3883_SYSC_REG_SYSCFG1);
+- syscfg1 &= ~(RT3883_SYSCFG1_PCIE_RC_MODE |
+- RT3883_SYSCFG1_PCI_HOST_MODE);
+-
+- rstctrl = rt3883_sysc_rr(RT3883_SYSC_REG_RSTCTRL);
+- rstctrl |= (RT3883_RSTCTRL_PCI | RT3883_RSTCTRL_PCIE);
+-
+- clkcfg1 = rt3883_sysc_rr(RT3883_SYSC_REG_CLKCFG1);
+- clkcfg1 &= ~(RT3883_CLKCFG1_PCI_CLK_EN |
+- RT3883_CLKCFG1_PCIE_CLK_EN);
++ syscfg1 |= (RT3883_SYSCFG1_PCIE_RC_MODE | RT3883_SYSCFG1_PCI_HOST_MODE);
++
++ clkcfg1 &= ~(RT3883_CLKCFG1_PCI_CLK_EN | RT3883_CLKCFG1_PCIE_CLK_EN);
+
+ if (mode & RT3883_PCI_MODE_PCI) {
+- syscfg1 |= RT3883_SYSCFG1_PCI_HOST_MODE;
+ clkcfg1 |= RT3883_CLKCFG1_PCI_CLK_EN;
+ rstctrl &= ~RT3883_RSTCTRL_PCI;
+ }
++
+ if (mode & RT3883_PCI_MODE_PCIE) {
+- syscfg1 |= RT3883_SYSCFG1_PCI_HOST_MODE |
+- RT3883_SYSCFG1_PCIE_RC_MODE;
+ clkcfg1 |= RT3883_CLKCFG1_PCIE_CLK_EN;
+ rstctrl &= ~RT3883_RSTCTRL_PCIE;
+ }
+
+- rt3883_sysc_wr(syscfg1, RT3883_SYSC_REG_SYSCFG1);
+- rt3883_sysc_wr(rstctrl, RT3883_SYSC_REG_RSTCTRL);
+- rt3883_sysc_wr(clkcfg1, RT3883_SYSC_REG_CLKCFG1);
++ rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
++ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
++ rt_sysc_w32(clkcfg1, RT3883_SYSC_REG_CLKCFG1);
+
+ msleep(500);
+-}
+
+-static int rt3883_pcie_ready(void)
+-{
+- u32 status;
++ /*
++ * setup the device number of the P2P bridge
++ * and de-assert the reset line
++ */
++ t = (RT3883_P2P_BR_DEVNUM << RT3883_PCICFG_P2P_BR_DEVNUM_S);
++ rt3883_pci_w32(rpc, t, RT3883_PCI_REG_PCICFG);
+
++ /* flush write */
++ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCICFG);
+ msleep(500);
+
+- status = rt3883_pci_rr(RT3883_PCI_REG_STATUS(1));
+- if (status & BIT(0))
+- return 0;
++ if (mode & RT3883_PCI_MODE_PCIE) {
++ msleep(500);
++
++ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_STATUS(1));
++
++ rpc->pcie_ready = t & BIT(0);
++
++ if (!rpc->pcie_ready) {
++ /* reset the PCIe block */
++ t = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
++ t |= RT3883_RSTCTRL_PCIE;
++ rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
++ t &= ~RT3883_RSTCTRL_PCIE;
++ rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
++
++ /* turn off PCIe clock */
++ t = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
++ t &= ~RT3883_CLKCFG1_PCIE_CLK_EN;
++ rt_sysc_w32(t, RT3883_SYSC_REG_CLKCFG1);
++
++ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
++ t &= ~0xf000c080;
++ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
++ }
++ }
++
++ /* enable PCI arbiter */
++ rt3883_pci_w32(rpc, 0x79, RT3883_PCI_REG_ARBCTL);
++}
+
+- /* TODO: reset PCIe and turn off PCIe clock */
++static inline void
++rt3883_dump_pci_config(struct rt3883_pci_controller *rpc,
++ int bus, int slot)
++{
++ int i;
++
++ for (i = 0; i < 16; i++) {
++ u32 val;
+
+- return -ENODEV;
++ val = rt3883_pci_read_cfg32(rpc, bus, slot, 0, i << 2);
++ pr_info("pci %02x:%02x.0 0x%02x = %08x\n",
++ bus, slot, i << 2, val);
++ }
+ }
+
+-void __init rt3883_pci_init(unsigned mode)
++static int rt3883_pci_probe(struct platform_device *pdev)
+ {
++ struct rt3883_pci_controller *rpc;
++ struct device *dev = &pdev->dev;
++ struct device_node *np = dev->of_node;
++ struct resource *res;
++ struct device_node *child;
+ u32 val;
+ int err;
++ int mode;
+
+- rt3883_pci_preinit(mode);
++ rpc = devm_kzalloc(dev, sizeof(*rpc), GFP_KERNEL);
++ if (!rpc)
++ return -ENOMEM;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!res)
++ return -EINVAL;
++
++ rpc->base = devm_ioremap_resource(dev, res);
++ if (IS_ERR(rpc->base))
++ return PTR_ERR(rpc->base);
++
++ rpc->pci_controller.of_node = of_get_child_by_name(np, "host-bridge");
++ if (!rpc->pci_controller.of_node) {
++ dev_err(dev, "no %s child node found", "host-bridge");
++ return -ENODEV;
++ }
++
++ mode = RT3883_PCI_MODE_NONE;
++ for_each_child_of_node(rpc->pci_controller.of_node, child) {
++ u32 slot;
++
++ if (!of_device_is_available(child))
++ continue;
++
++ if (of_property_read_u32(child, "ralink,pci-slot",
++ &slot)) {
++ dev_err(dev, "no '%s' property found for %s\n",
++ "ralink,pci-slot",
++ of_node_full_name(child));
++ continue;
++ }
+
+- rt3883_pci_base = ioremap(RT3883_PCI_BASE, PAGE_SIZE);
+- if (rt3883_pci_base == NULL) {
+- pr_err("failed to ioremap PCI registers\n");
+- return;
++ switch (slot) {
++ case 1:
++ mode |= RT3883_PCI_MODE_PCIE;
++ break;
++
++ case 17:
++ case 18:
++ mode |= RT3883_PCI_MODE_PCI;
++ break;
++ }
+ }
+
+- rt3883_pci_wr(0, RT3883_PCI_REG_PCICFG_ADDR);
+- if (mode & RT3883_PCI_MODE_PCI)
+- rt3883_pci_wr(BIT(16), RT3883_PCI_REG_PCICFG_ADDR);
++ if (mode == RT3883_PCI_MODE_NONE) {
++ dev_err(dev, "unable to determine PCI mode\n");
++ err = -EINVAL;
++ goto err_put_hb_node;
++ }
+
+- msleep(500);
++ dev_info(dev, "mode:%s%s\n",
++ (mode & RT3883_PCI_MODE_PCI) ? " PCI" : "",
++ (mode & RT3883_PCI_MODE_PCIE) ? " PCIe" : "");
+
+- if (mode & RT3883_PCI_MODE_PCIE) {
+- err = rt3883_pcie_ready();
+- if (err)
+- return;
+- }
++ rt3883_pci_preinit(rpc, mode);
+
+- if (mode & RT3883_PCI_MODE_PCI)
+- rt3883_pci_wr(0x79, RT3883_PCI_REG_ARBCTL);
++ rpc->pci_controller.pci_ops = &rt3883_pci_ops;
++ rpc->pci_controller.io_resource = &rpc->io_res;
++ rpc->pci_controller.mem_resource = &rpc->mem_res;
+
+- rt3883_pci_wr(RT3883_PCI_MEM_BASE, RT3883_PCI_REG_MEMBASE);
+- rt3883_pci_wr(RT3883_PCI_IO_BASE, RT3883_PCI_REG_IOBASE);
++ /* Load PCI I/O and memory resources from DT */
++ pci_load_of_ranges(&rpc->pci_controller,
++ rpc->pci_controller.of_node);
++
++ rt3883_pci_w32(rpc, rpc->mem_res.start, RT3883_PCI_REG_MEMBASE);
++ rt3883_pci_w32(rpc, rpc->io_res.start, RT3883_PCI_REG_IOBASE);
++
++ ioport_resource.start = rpc->io_res.start;
++ ioport_resource.end = rpc->io_res.end;
+
+ /* PCI */
+- rt3883_pci_wr(0x03ff0000, RT3883_PCI_REG_BAR0SETUP_ADDR(0));
+- rt3883_pci_wr(RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0_ADDR(0));
+- rt3883_pci_wr(0x08021814, RT3883_PCI_REG_ID(0));
+- rt3883_pci_wr(0x00800001, RT3883_PCI_REG_CLASS(0));
+- rt3883_pci_wr(0x28801814, RT3883_PCI_REG_SUBID(0));
++ rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(0));
++ rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(0));
++ rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(0));
++ rt3883_pci_w32(rpc, 0x00800001, RT3883_PCI_REG_CLASS(0));
++ rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(0));
+
+ /* PCIe */
+- rt3883_pci_wr(0x01ff0000, RT3883_PCI_REG_BAR0SETUP_ADDR(1));
+- rt3883_pci_wr(RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0_ADDR(1));
+- rt3883_pci_wr(0x08021814, RT3883_PCI_REG_ID(1));
+- rt3883_pci_wr(0x06040001, RT3883_PCI_REG_CLASS(1));
+- rt3883_pci_wr(0x28801814, RT3883_PCI_REG_SUBID(1));
+-
+- rt3883_pci_irq_init();
++ rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(1));
++ rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(1));
++ rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(1));
++ rt3883_pci_w32(rpc, 0x06040001, RT3883_PCI_REG_CLASS(1));
++ rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(1));
++
++ err = rt3883_pci_irq_init(dev, rpc);
++ if (err)
++ goto err_put_hb_node;
+
+ /* PCIe */
+- val = rt3883_pci_read_u32(0, 0x01, 0, PCI_COMMAND);
+- val |= 0x7;
+- rt3883_pci_write_u32(0, 0x01, 0, PCI_COMMAND, val);
++ val = rt3883_pci_read_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND);
++ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
++ rt3883_pci_write_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND, val);
+
+ /* PCI */
+- val = rt3883_pci_read_u32(0, 0x00, 0, PCI_COMMAND);
+- val |= 0x7;
+- rt3883_pci_write_u32(0, 0x00, 0, PCI_COMMAND, val);
++ val = rt3883_pci_read_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND);
++ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
++ rt3883_pci_write_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND, val);
++
++ if (mode == RT3883_PCI_MODE_PCIE) {
++ rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(0));
++ rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(1));
++
++ rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
++ PCI_BASE_ADDRESS_0,
++ RT3883_MEMORY_BASE);
++ /* flush write */
++ rt3883_pci_read_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
++ PCI_BASE_ADDRESS_0);
++ } else {
++ rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
++ PCI_IO_BASE, 0x00000101);
++ }
++
++ register_pci_controller(&rpc->pci_controller);
+
+- ioport_resource.start = rt3883_pci_io_resource.start;
+- ioport_resource.end = rt3883_pci_io_resource.end;
++ return 0;
+
+- register_pci_controller(&rt3883_pci_controller);
++err_put_hb_node:
++ of_node_put(rpc->pci_controller.of_node);
++ return err;
+ }
+
+ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+ {
+- int irq = -1;
+-
+- switch (dev->bus->number) {
+- case 0:
+- switch (PCI_SLOT(dev->devfn)) {
+- case 0x00:
+- rt3883_pci_wr(0x03ff0001,
+- RT3883_PCI_REG_BAR0SETUP_ADDR(0));
+- rt3883_pci_wr(0x03ff0001,
+- RT3883_PCI_REG_BAR0SETUP_ADDR(1));
+-
+- rt3883_pci_write_u32(0, 0x00, 0, PCI_BASE_ADDRESS_0,
+- RT3883_MEMORY_BASE);
+- rt3883_pci_read_u32(0, 0x00, 0, PCI_BASE_ADDRESS_0);
+-
+- irq = RT3883_CPU_IRQ_PCI;
+- break;
+- case 0x01:
+- rt3883_pci_write_u32(0, 0x01, 0, PCI_IO_BASE,
+- 0x00000101);
+- break;
+- case 0x11:
+- irq = RT3883_PCI_IRQ_PCI0;
+- break;
+- case 0x12:
+- irq = RT3883_PCI_IRQ_PCI1;
+- break;
+- }
+- break;
+-
+- case 1:
+- irq = RT3883_PCI_IRQ_PCIE;
+- break;
++ struct rt3883_pci_controller *rpc;
++ struct of_irq dev_irq;
++ int err;
++ int irq;
+
+- default:
+- dev_err(&dev->dev, "no IRQ specified\n");
+- return irq;
++ rpc = pci_bus_to_rt3883_controller(dev->bus);
++ err = of_irq_map_pci(dev, &dev_irq);
++ if (err) {
++ pr_err("pci %s: unable to get irq map, err=%d\n",
++ pci_name((struct pci_dev *) dev), err);
++ return 0;
+ }
+
++ irq = irq_create_of_mapping(dev_irq.controller,
++ dev_irq.specifier,
++ dev_irq.size);
++
++ 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;
+ }
+
+-void __init rt3883_pci_set_plat_dev_init(int (*f)(struct pci_dev *dev))
++int pcibios_plat_dev_init(struct pci_dev *dev)
+ {
+- rt3883_pci_plat_dev_init = f;
++ return 0;
+ }
+
+-int pcibios_plat_dev_init(struct pci_dev *dev)
+-{
+- if (rt3883_pci_plat_dev_init)
+- return rt3883_pci_plat_dev_init(dev);
++static const struct of_device_id rt3883_pci_ids[] = {
++ { .compatible = "ralink,rt3883-pci" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, rt3883_pci_ids);
+
+- return 0;
++static struct platform_driver rt3883_pci_driver = {
++ .probe = rt3883_pci_probe,
++ .driver = {
++ .name = "rt3883-pci",
++ .owner = THIS_MODULE,
++ .of_match_table = of_match_ptr(rt3883_pci_ids),
++ },
++};
++
++static int __init rt3883_pci_init(void)
++{
++ return platform_driver_register(&rt3883_pci_driver);
+ }
++
++postcore_initcall(rt3883_pci_init);
projects / openwrt / staging / blocktrron.git / commitdiff