From d8b74276f5488d64ebb28d77631b536f1c5de6d2 Mon Sep 17 00:00:00 2001 From: Aaro Koskinen Date: Thu, 25 Jul 2013 20:26:48 +0300 Subject: MIPS: cavium-octeon: fix I/O space setup on non-PCI systems Fix I/O space setup, so that on non-PCI systems using inb()/outb() won't crash the system. Some drivers may try to probe I/O space and for that purpose we can just allocate some normal memory initially. Drivers trying to reserve a region will fail early as we set the size to 0. If a real I/O space is present, the PCI/PCIe support code will re-adjust the values accordingly. Tested with EdgeRouter Lite by enabling CONFIG_SERIO_I8042 that caused the originally reported crash. Reported-by: Faidon Liambotis Signed-off-by: Aaro Koskinen Acked-by: David Daney Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5626/ Signed-off-by: Ralf Baechle --- arch/mips/pci/pci-octeon.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'arch/mips/pci') diff --git a/arch/mips/pci/pci-octeon.c b/arch/mips/pci/pci-octeon.c index 95c2ea815ca..59cccd95688 100644 --- a/arch/mips/pci/pci-octeon.c +++ b/arch/mips/pci/pci-octeon.c @@ -586,15 +586,16 @@ static int __init octeon_pci_setup(void) else octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_BIG; - /* PCI I/O and PCI MEM values */ - set_io_port_base(OCTEON_PCI_IOSPACE_BASE); - ioport_resource.start = 0; - ioport_resource.end = OCTEON_PCI_IOSPACE_SIZE - 1; if (!octeon_is_pci_host()) { pr_notice("Not in host mode, PCI Controller not initialized\n"); return 0; } + /* PCI I/O and PCI MEM values */ + set_io_port_base(OCTEON_PCI_IOSPACE_BASE); + ioport_resource.start = 0; + ioport_resource.end = OCTEON_PCI_IOSPACE_SIZE - 1; + pr_notice("%s Octeon big bar support\n", (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_BIG) ? "Enabling" : "Disabling"); -- cgit v1.2.3-70-g09d2 From 12d14e0edd4ea7b5fd879e55855969771d37aad8 Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Fri, 23 Aug 2013 14:03:20 +0200 Subject: MIPS: Add driver for the built-in PCI controller of the RT3883 SoC The Ralink RT3883 SoCs have a built-in PCI Host Controller device. The patch adds a platform driver and device tree binding documentation for that. The patch also enables the HW_HAS_PCI config option. This is required in order to be able to enable the PCI support. Signed-off-by: Gabor Juhos Acked-by: John Crispin Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/5758/ Signed-off-by: Ralf Baechle --- .../devicetree/bindings/pci/ralink,rt3883-pci.txt | 190 ++++++ arch/mips/pci/Makefile | 1 + arch/mips/pci/pci-rt3883.c | 636 +++++++++++++++++++++ arch/mips/ralink/Kconfig | 1 + 4 files changed, 828 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt create mode 100644 arch/mips/pci/pci-rt3883.c (limited to 'arch/mips/pci') diff --git a/Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt b/Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt new file mode 100644 index 00000000000..8e0a1eb0acb --- /dev/null +++ b/Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt @@ -0,0 +1,190 @@ +* Mediatek/Ralink RT3883 PCI controller + +1) Main node + + Required properties: + + - compatible: must be "ralink,rt3883-pci" + + - reg: specifies the physical base address of the controller and + the length of the memory mapped region. + + - #address-cells: specifies the number of cells needed to encode an + address. The value must be 1. + + - #size-cells: specifies the number of cells used to represent the size + of an address. The value must be 1. + + - ranges: specifies the translation between child address space and parent + address space + + Optional properties: + + - status: indicates the operational status of the device. + Value must be either "disabled" or "okay". + +2) Child nodes + + The main node must have two child nodes which describes the built-in + interrupt controller and the PCI host bridge. + + a) Interrupt controller: + + Required properties: + + - interrupt-controller: identifies the node as an interrupt controller + + - #address-cells: specifies the number of cells needed to encode an + address. The value must be 0. As such, 'interrupt-map' nodes do not + have to specify a parent unit address. + + - #interrupt-cells: specifies the number of cells needed to encode an + interrupt source. The value must be 1. + + - interrupt-parent: the phandle for the interrupt controller that + services interrupts for this device. + + - interrupts: specifies the interrupt source of the parent interrupt + controller. The format of the interrupt specifier depends on the + parent interrupt controller. + + b) PCI host bridge: + + Required properties: + + - #address-cells: specifies the number of cells needed to encode an + address. The value must be 0. + + - #size-cells: specifies the number of cells used to represent the size + of an address. The value must be 2. + + - #interrupt-cells: specifies the number of cells needed to encode an + interrupt source. The value must be 1. + + - device_type: must be "pci" + + - bus-range: PCI bus numbers covered + + - ranges: specifies the ranges for the PCI memory and I/O regions + + - interrupt-map-mask, + - interrupt-map: standard PCI properties to define the mapping of the + PCI interface to interrupt numbers. + + The PCI host bridge node migh have additional sub-nodes representing + the onboard PCI devices/PCI slots. Each such sub-node must have the + following mandatory properties: + + - reg: used only for interrupt mapping, so only the first four bytes + are used to refer to the correct bus number and device number. + + - device_type: must be "pci" + + If a given sub-node represents a PCI bridge it must have following + mandatory properties as well: + + - #address-cells: must be set to <3> + + - #size-cells: must set to <2> + + - #interrupt-cells: must be set to <1> + + - interrupt-map-mask, + - interrupt-map: standard PCI properties to define the mapping of the + PCI interface to interrupt numbers. + + Besides the required properties the sub-nodes may have these optional + properties: + + - status: indicates the operational status of the sub-node. + Value must be either "disabled" or "okay". + +3) Example: + + a) SoC specific dtsi file: + + pci@10140000 { + compatible = "ralink,rt3883-pci"; + reg = <0x10140000 0x20000>; + #address-cells = <1>; + #size-cells = <1>; + ranges; /* direct mapping */ + + status = "disabled"; + + pciintc: interrupt-controller { + interrupt-controller; + #address-cells = <0>; + #interrupt-cells = <1>; + + interrupt-parent = <&cpuintc>; + interrupts = <4>; + }; + + host-bridge { + #address-cells = <3>; + #size-cells = <2>; + #interrupt-cells = <1>; + + device_type = "pci"; + + bus-range = <0 255>; + ranges = < + 0x02000000 0 0x00000000 0x20000000 0 0x10000000 /* pci memory */ + 0x01000000 0 0x00000000 0x10160000 0 0x00010000 /* io space */ + >; + + interrupt-map-mask = <0xf800 0 0 7>; + interrupt-map = < + /* IDSEL 17 */ + 0x8800 0 0 1 &pciintc 18 + 0x8800 0 0 2 &pciintc 18 + 0x8800 0 0 3 &pciintc 18 + 0x8800 0 0 4 &pciintc 18 + /* IDSEL 18 */ + 0x9000 0 0 1 &pciintc 19 + 0x9000 0 0 2 &pciintc 19 + 0x9000 0 0 3 &pciintc 19 + 0x9000 0 0 4 &pciintc 19 + >; + + pci-bridge@1 { + reg = <0x0800 0 0 0 0>; + device_type = "pci"; + #interrupt-cells = <1>; + #address-cells = <3>; + #size-cells = <2>; + + interrupt-map-mask = <0x0 0 0 0>; + interrupt-map = <0x0 0 0 0 &pciintc 20>; + + status = "disabled"; + }; + + pci-slot@17 { + reg = <0x8800 0 0 0 0>; + device_type = "pci"; + + status = "disabled"; + }; + + pci-slot@18 { + reg = <0x9000 0 0 0 0>; + device_type = "pci"; + + status = "disabled"; + }; + }; + }; + + b) Board specific dts file: + + pci@10140000 { + status = "okay"; + + host-bridge { + pci-bridge@1 { + status = "okay"; + }; + }; + }; diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile index c382042911d..719e4557e22 100644 --- a/arch/mips/pci/Makefile +++ b/arch/mips/pci/Makefile @@ -41,6 +41,7 @@ obj-$(CONFIG_SIBYTE_BCM1x80) += pci-bcm1480.o pci-bcm1480ht.o obj-$(CONFIG_SNI_RM) += fixup-sni.o ops-sni.o obj-$(CONFIG_LANTIQ) += fixup-lantiq.o obj-$(CONFIG_PCI_LANTIQ) += pci-lantiq.o ops-lantiq.o +obj-$(CONFIG_SOC_RT3883) += pci-rt3883.o obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o obj-$(CONFIG_TANBAC_TB0226) += fixup-tb0226.o obj-$(CONFIG_TANBAC_TB0287) += fixup-tb0287.o diff --git a/arch/mips/pci/pci-rt3883.c b/arch/mips/pci/pci-rt3883.c new file mode 100644 index 00000000000..95c9d41382e --- /dev/null +++ b/arch/mips/pci/pci-rt3883.c @@ -0,0 +1,636 @@ +/* + * Ralink RT3662/RT3883 SoC PCI support + * + * Copyright (C) 2011-2013 Gabor Juhos + * + * Parts of this file are based on Ralink's 2.6.21 BSP + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define RT3883_MEMORY_BASE 0x00000000 +#define RT3883_MEMORY_SIZE 0x02000000 + +#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_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(_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) + +#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) + +#define RT3883_PCI_IRQ_COUNT 32 + +#define RT3883_P2P_BR_DEVNUM 1 + +struct rt3883_pci_controller { + void __iomem *base; + spinlock_t lock; + + struct device_node *intc_of_node; + struct irq_domain *irq_domain; + + struct pci_controller pci_controller; + struct resource io_res; + struct resource mem_res; + + bool pcie_ready; +}; + +static inline struct rt3883_pci_controller * +pci_bus_to_rt3883_controller(struct pci_bus *bus) +{ + 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_w32(struct rt3883_pci_controller *rpc, + u32 val, unsigned reg) +{ + iowrite32(val, rpc->base + reg); +} + +static inline u32 rt3883_pci_get_cfgaddr(unsigned int bus, unsigned int slot, + unsigned int func, unsigned int where) +{ + return (bus << 16) | (slot << 11) | (func << 8) | (where & 0xfc) | + 0x80000000; +} + +static u32 rt3883_pci_read_cfg32(struct rt3883_pci_controller *rpc, + unsigned bus, unsigned slot, + unsigned func, unsigned reg) +{ + unsigned long flags; + u32 address; + u32 ret; + + address = rt3883_pci_get_cfgaddr(bus, slot, func, reg); + + 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_cfg32(struct rt3883_pci_controller *rpc, + unsigned bus, unsigned slot, + unsigned func, unsigned reg, u32 val) +{ + unsigned long flags; + u32 address; + + address = rt3883_pci_get_cfgaddr(bus, slot, func, reg); + + 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; + + 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; + } + + while (pending) { + unsigned bit = __ffs(pending); + + irq = irq_find_mapping(rpc->irq_domain, bit); + generic_handle_irq(irq); + + pending &= ~BIT(bit); + } +} + +static void rt3883_pci_irq_unmask(struct irq_data *d) +{ + struct rt3883_pci_controller *rpc; + u32 t; + + rpc = irq_data_get_irq_chip_data(d); + + 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_r32(rpc, RT3883_PCI_REG_PCIENA); +} + +static void rt3883_pci_irq_mask(struct irq_data *d) +{ + struct rt3883_pci_controller *rpc; + u32 t; + + rpc = irq_data_get_irq_chip_data(d); + + 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_r32(rpc, RT3883_PCI_REG_PCIENA); +} + +static struct irq_chip rt3883_pci_irq_chip = { + .name = "RT3883 PCI", + .irq_mask = rt3883_pci_irq_mask, + .irq_unmask = rt3883_pci_irq_unmask, + .irq_mask_ack = rt3883_pci_irq_mask, +}; + +static int rt3883_pci_irq_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + 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) +{ + int irq; + + irq = irq_of_parse_and_map(rpc->intc_of_node, 0); + if (irq == 0) { + dev_err(dev, "%s has no IRQ", + of_node_full_name(rpc->intc_of_node)); + return -EINVAL; + } + + /* disable all interrupts */ + rt3883_pci_w32(rpc, 0, RT3883_PCI_REG_PCIENA); + + rpc->irq_domain = + irq_domain_add_linear(rpc->intc_of_node, RT3883_PCI_IRQ_COUNT, + &rt3883_pci_irq_domain_ops, + rpc); + if (!rpc->irq_domain) { + dev_err(dev, "unable to add IRQ domain\n"); + return -ENODEV; + } + + irq_set_handler_data(irq, rpc); + irq_set_chained_handler(irq, rt3883_pci_irq_handler); + + return 0; +} + +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(&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: + *val = (data >> ((where & 3) << 3)) & 0xff; + break; + case 2: + *val = (data >> ((where & 3) << 3)) & 0xffff; + break; + case 4: + *val = data; + break; + } + + return PCIBIOS_SUCCESSFUL; +} + +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(&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: + data = (data & ~(0xff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + break; + case 2: + data = (data & ~(0xffff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + break; + case 4: + data = val; + break; + } + + rt3883_pci_w32(rpc, data, RT3883_PCI_REG_CFGDATA); + spin_unlock_irqrestore(&rpc->lock, flags); + + return PCIBIOS_SUCCESSFUL; +} + +static struct pci_ops rt3883_pci_ops = { + .read = rt3883_pci_config_read, + .write = rt3883_pci_config_write, +}; + +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) { + rstctrl |= RT3883_RSTCTRL_PCIE; + rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL); + + /* 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_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) { + clkcfg1 |= RT3883_CLKCFG1_PCI_CLK_EN; + rstctrl &= ~RT3883_RSTCTRL_PCI; + } + + if (mode & RT3883_PCI_MODE_PCIE) { + clkcfg1 |= RT3883_CLKCFG1_PCIE_CLK_EN; + rstctrl &= ~RT3883_RSTCTRL_PCIE; + } + + 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); + + /* + * 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); + + 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); +} + +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; + + 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); + + /* find the interrupt controller child node */ + for_each_child_of_node(np, child) { + if (of_get_property(child, "interrupt-controller", NULL) && + of_node_get(child)) { + rpc->intc_of_node = child; + break; + } + } + + if (!rpc->intc_of_node) { + dev_err(dev, "%s has no %s child node", + of_node_full_name(rpc->intc_of_node), + "interrupt controller"); + return -EINVAL; + } + + /* find the PCI host bridge child node */ + for_each_child_of_node(np, child) { + if (child->type && + of_node_cmp(child->type, "pci") == 0 && + of_node_get(child)) { + rpc->pci_controller.of_node = child; + break; + } + } + + if (!rpc->pci_controller.of_node) { + dev_err(dev, "%s has no %s child node", + of_node_full_name(rpc->intc_of_node), + "PCI host bridge"); + err = -EINVAL; + goto err_put_intc_node; + } + + mode = RT3883_PCI_MODE_NONE; + for_each_available_child_of_node(rpc->pci_controller.of_node, child) { + int devfn; + + if (!child->type || + of_node_cmp(child->type, "pci") != 0) + continue; + + devfn = of_pci_get_devfn(child); + if (devfn < 0) + continue; + + switch (PCI_SLOT(devfn)) { + case 1: + mode |= RT3883_PCI_MODE_PCIE; + break; + + case 17: + case 18: + mode |= RT3883_PCI_MODE_PCI; + break; + } + } + + if (mode == RT3883_PCI_MODE_NONE) { + dev_err(dev, "unable to determine PCI mode\n"); + err = -EINVAL; + goto err_put_hb_node; + } + + dev_info(dev, "mode:%s%s\n", + (mode & RT3883_PCI_MODE_PCI) ? " PCI" : "", + (mode & RT3883_PCI_MODE_PCIE) ? " PCIe" : ""); + + rt3883_pci_preinit(rpc, mode); + + rpc->pci_controller.pci_ops = &rt3883_pci_ops; + rpc->pci_controller.io_resource = &rpc->io_res; + rpc->pci_controller.mem_resource = &rpc->mem_res; + + /* 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_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_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_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_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); + + return 0; + +err_put_hb_node: + of_node_put(rpc->pci_controller.of_node); +err_put_intc_node: + of_node_put(rpc->intc_of_node); + return err; +} + +int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + struct of_irq dev_irq; + int err; + int irq; + + 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; +} + +int pcibios_plat_dev_init(struct pci_dev *dev) +{ + return 0; +} + +static const struct of_device_id rt3883_pci_ids[] = { + { .compatible = "ralink,rt3883-pci" }, + {}, +}; +MODULE_DEVICE_TABLE(of, rt3883_pci_ids); + +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); diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig index 5f5dad26c13..424f03496d1 100644 --- a/arch/mips/ralink/Kconfig +++ b/arch/mips/ralink/Kconfig @@ -26,6 +26,7 @@ choice bool "RT3883" select USB_ARCH_HAS_OHCI select USB_ARCH_HAS_EHCI + select HW_HAS_PCI config SOC_MT7620 bool "MT7620" -- cgit v1.2.3-70-g09d2