diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0025-PCI-mediatek-add-support-for-PCIe-found-on-MT7623-MT.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.4/0025-PCI-mediatek-add-support-for-PCIe-found-on-MT7623-MT.patch | 710 |
1 files changed, 710 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0025-PCI-mediatek-add-support-for-PCIe-found-on-MT7623-MT.patch b/target/linux/mediatek/patches-4.4/0025-PCI-mediatek-add-support-for-PCIe-found-on-MT7623-MT.patch new file mode 100644 index 0000000000..9e12892bc4 --- /dev/null +++ b/target/linux/mediatek/patches-4.4/0025-PCI-mediatek-add-support-for-PCIe-found-on-MT7623-MT.patch @@ -0,0 +1,710 @@ +From fc6d1a9f37cddd79c0c149e3f1394d393ac05772 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Tue, 5 Jan 2016 20:20:04 +0100 +Subject: [PATCH 25/53] PCI: mediatek: add support for PCIe found on + MT7623/MT2701 + +Add PCIe controller support on MediaTek MT2701/MT7623. The driver supports +a single Root complex (RC) with 3 Root Ports. The SoCs supports a Gen2 +1-lan Link on each port. + +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + arch/arm/mach-mediatek/Kconfig | 1 + + drivers/pci/host/Kconfig | 11 + + drivers/pci/host/Makefile | 1 + + drivers/pci/host/pcie-mediatek.c | 641 ++++++++++++++++++++++++++++++++++++++ + 4 files changed, 654 insertions(+) + create mode 100644 drivers/pci/host/pcie-mediatek.c + +diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig +index 7fb605e..a7fef77 100644 +--- a/arch/arm/mach-mediatek/Kconfig ++++ b/arch/arm/mach-mediatek/Kconfig +@@ -24,6 +24,7 @@ config MACH_MT6592 + config MACH_MT7623 + bool "MediaTek MT7623 SoCs support" + default ARCH_MEDIATEK ++ select MIGHT_HAVE_PCI + + config MACH_MT8127 + bool "MediaTek MT8127 SoCs support" +diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig +index f131ba9..912f0e1 100644 +--- a/drivers/pci/host/Kconfig ++++ b/drivers/pci/host/Kconfig +@@ -172,4 +172,15 @@ config PCI_HISI + help + Say Y here if you want PCIe controller support on HiSilicon HIP05 SoC + ++config PCIE_MTK ++ bool "Mediatek PCIe Controller" ++ depends on MACH_MT2701 || MACH_MT7623 ++ depends on OF ++ depends on PCI ++ help ++ Say Y here if you want to enable PCI controller support on Mediatek MT7623. ++ MT7623 PCIe supports single Root complex (RC) with 3 Root Ports. ++ Each port supports a Gen2 1-lan Link. ++ PCIe include one Host/PCI bridge and 3 PCIe MAC. ++ + endmenu +diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile +index 9d4d3c6..3b53374 100644 +--- a/drivers/pci/host/Makefile ++++ b/drivers/pci/host/Makefile +@@ -20,3 +20,4 @@ obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o + obj-$(CONFIG_PCIE_ALTERA) += pcie-altera.o + obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o + obj-$(CONFIG_PCI_HISI) += pcie-hisi.o ++obj-$(CONFIG_PCIE_MTK) += pcie-mediatek.o +diff --git a/drivers/pci/host/pcie-mediatek.c b/drivers/pci/host/pcie-mediatek.c +new file mode 100644 +index 0000000..ef03952 +--- /dev/null ++++ b/drivers/pci/host/pcie-mediatek.c +@@ -0,0 +1,641 @@ ++/* ++ * Mediatek MT2701/MT7623 SoC PCIE support ++ * ++ * Copyright (C) 2015 Mediatek ++ * Copyright (C) 2015 Ziv Huang <ziv.huang@mediatek.com> ++ * Copyright (C) 2015 John Crispin <blogic@openwrt.org> ++ * ++ * 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 <linux/kernel.h> ++#include <linux/pci.h> ++#include <linux/ioport.h> ++#include <linux/interrupt.h> ++#include <linux/spinlock.h> ++#include <linux/init.h> ++#include <linux/device.h> ++#include <linux/io.h> ++#include <linux/delay.h> ++#include <asm/irq.h> ++#include <asm/mach/pci.h> ++#include <linux/module.h> ++#include <linux/of.h> ++#include <linux/of_address.h> ++#include <linux/of_pci.h> ++#include <linux/of_platform.h> ++#include <linux/of_irq.h> ++#include <linux/reset.h> ++#include <linux/platform_device.h> ++#include <linux/regulator/consumer.h> ++#include <linux/pm_runtime.h> ++#include <linux/clk.h> ++#include <linux/regmap.h> ++#include <linux/mfd/syscon.h> ++ ++#define MEMORY_BASE 0x80000000 ++ ++/* PCIE Registers */ ++#define PCICFG 0x00 ++#define PCIINT 0x08 ++#define PCIENA 0x0c ++#define CFGADDR 0x20 ++#define CFGDATA 0x24 ++#define MEMBASE 0x28 ++#define IOBASE 0x2c ++ ++/* per Port Registers */ ++#define BAR0SETUP 0x10 ++#define IMBASEBAR0 0x18 ++#define PCIE_CLASS 0x34 ++#define PCIE_SISTAT 0x50 ++ ++#define MTK_PCIE_HIGH_PERF BIT(14) ++#define PCIEP0_BASE 0x2000 ++#define PCIEP1_BASE 0x3000 ++#define PCIEP2_BASE 0x4000 ++ ++#define PHY_P0_CTL 0x9000 ++#define PHY_P1_CTL 0xa000 ++#define PHY_P2_CTL 0x4000 ++ ++#define RSTCTL_PCIE0_RST BIT(24) ++#define RSTCTL_PCIE1_RST BIT(25) ++#define RSTCTL_PCIE2_RST BIT(26) ++ ++#define HIFSYS_SYSCFG1 0x14 ++#define HIFSYS_SYSCFG1_PHY2_MASK (0x3 << 20) ++ ++#define MTK_PHY_CLK 0xb00 ++#define MTK_PHY_CLKDRV_OFFSET BIT(2) ++#define MTK_PHY_CLKDRV_OFFSET_MASK 0xe ++#define MTK_PHY_PLL 0xb04 ++#define MTK_PHY_CLKDRV_AMP BIT(30) ++#define MTK_PHY_CLKDRV_AMP_MASK 0xe0000000 ++#define MTK_PHY_REFCLK_SEL 0xc00 ++#define MTK_PHY_XTAL_EXT_EN (BIT(17) | BIT(12)) ++#define MTK_PHY_XTAL_EXT_EN_MASK 0x33000 ++#define MTK_PHY_PLL_BC 0xc08 ++#define MTK_PHY_PLL_BC_PE2H 0xc0 ++#define MTK_PHY_PLL_BC_PE2H_MASK 0x380000 ++#define MTK_PHY_PLL_IC 0xc0c ++#define MTK_PHY_PLL_IC_BR_PE2H BIT(28) ++#define MTK_PHY_PLL_IC_BR_PE2H_MASK 0x30000000 ++#define MTK_PHY_PLL_IC_PE2H BIT(12) ++#define MTK_PHY_PLL_IC_PE2H_MASK 0xf000 ++#define MTK_PHY_PLL_IR 0xc10 ++#define MTK_PHY_PLL_IR_PE2H BIT(17) ++#define MTK_PHY_PLL_IR_PE2H_MASK 0xf0000 ++#define MTK_PHY_PLL_BP 0xc14 ++#define MTK_PHY_PLL_BP_PE2H (BIT(19) | BIT(17)) ++#define MTK_PHY_PLL_BP_PE2H_MASK 0xf0000 ++#define MTK_PHY_SSC_DELTA1 0xc3c ++#define MTK_PHY_SSC_DELTA1_PE2H (0x3c << 16) ++#define MTK_PHY_SSC_DELTA1_PE2H_MASK 0xffff0000 ++#define MTK_PHY_SSC_DELTA 0xc48 ++#define MTK_PHY_SSC_DELTA_PE2H 0x36 ++#define MTK_PHY_SSC_DELTA_PE2H_MASK 0xffff ++ ++#define MAX_PORT_NUM 3 ++ ++struct mtk_pcie_port { ++ int id; ++ int enable; ++ int irq; ++ u32 link; ++ void __iomem *phy_base; ++ struct reset_control *rstc; ++}; ++ ++#define mtk_foreach_port(pcie, p) \ ++ for ((p) = pcie->port; \ ++ (p) != &pcie->port[MAX_PORT_NUM]; (p)++) ++ ++struct mtk_pcie { ++ struct device *dev; ++ void __iomem *pcie_base; ++ struct regmap *hifsys; ++ ++ struct resource io; ++ struct resource pio; ++ struct resource mem; ++ struct resource prefetch; ++ struct resource busn; ++ ++ u32 io_bus_addr; ++ u32 mem_bus_addr; ++ ++ struct clk *clk; ++ ++ struct mtk_pcie_port port[MAX_PORT_NUM]; ++ int pcie_card_link; ++}; ++ ++static struct mtk_pcie_port_data { ++ u32 base; ++ u32 perst_n; ++ u32 interrupt_en; ++} mtk_pcie_port_data[MAX_PORT_NUM] = { ++ { PCIEP0_BASE, BIT(1), BIT(20) }, ++ { PCIEP1_BASE, BIT(2), BIT(21) }, ++ { PCIEP2_BASE, BIT(3), BIT(22) }, ++}; ++ ++static const struct mtk_phy_init { ++ uint32_t reg; ++ uint32_t mask; ++ uint32_t val; ++} mtk_phy_init[] = { ++ { MTK_PHY_REFCLK_SEL, MTK_PHY_XTAL_EXT_EN_MASK, MTK_PHY_XTAL_EXT_EN }, ++ { MTK_PHY_PLL, MTK_PHY_CLKDRV_AMP_MASK, MTK_PHY_CLKDRV_AMP }, ++ { MTK_PHY_CLK, MTK_PHY_CLKDRV_OFFSET_MASK, MTK_PHY_CLKDRV_OFFSET }, ++ { MTK_PHY_SSC_DELTA1, MTK_PHY_SSC_DELTA1_PE2H_MASK, MTK_PHY_SSC_DELTA1_PE2H }, ++ { MTK_PHY_SSC_DELTA, MTK_PHY_SSC_DELTA_PE2H_MASK, MTK_PHY_SSC_DELTA_PE2H }, ++ { MTK_PHY_PLL_IC, MTK_PHY_PLL_IC_BR_PE2H_MASK, MTK_PHY_PLL_IC_BR_PE2H }, ++ { MTK_PHY_PLL_BC, MTK_PHY_PLL_BC_PE2H_MASK, MTK_PHY_PLL_BC_PE2H }, ++ { MTK_PHY_PLL_IR, MTK_PHY_PLL_IR_PE2H_MASK, MTK_PHY_PLL_IR_PE2H }, ++ { MTK_PHY_PLL_IC, MTK_PHY_PLL_IC_PE2H_MASK, MTK_PHY_PLL_IC_PE2H }, ++ { MTK_PHY_PLL_BP, MTK_PHY_PLL_BP_PE2H_MASK, MTK_PHY_PLL_BP_PE2H }, ++}; ++ ++static struct mtk_pcie *sys_to_pcie(struct pci_sys_data *sys) ++{ ++ return sys->private_data; ++} ++ ++static void pcie_w32(struct mtk_pcie *pcie, u32 val, unsigned reg) ++{ ++ iowrite32(val, pcie->pcie_base + reg); ++} ++ ++static u32 pcie_r32(struct mtk_pcie *pcie, unsigned reg) ++{ ++ return ioread32(pcie->pcie_base + reg); ++} ++ ++static void pcie_m32(struct mtk_pcie *pcie, u32 mask, u32 val, unsigned reg) ++{ ++ u32 v = pcie_r32(pcie, reg); ++ ++ v &= mask; ++ v |= val; ++ pcie_w32(pcie, v, reg); ++} ++ ++static int pcie_config_read(struct pci_bus *bus, unsigned int devfn, int where, ++ int size, u32 *val) ++{ ++ struct mtk_pcie *pcie = sys_to_pcie(bus->sysdata); ++ unsigned int slot = PCI_SLOT(devfn); ++ u8 func = PCI_FUNC(devfn); ++ u32 address; ++ u32 data; ++ u32 num = 0; ++ ++ if (bus) ++ num = bus->number; ++ ++ address = (((where & 0xf00) >> 8) << 24) | ++ (num << 16) | ++ (slot << 11) | ++ (func << 8) | ++ (where & 0xfc); ++ ++ pcie_w32(pcie, address, CFGADDR); ++ data = pcie_r32(pcie, CFGDATA); ++ ++ 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 pcie_config_write(struct pci_bus *bus, unsigned int devfn, int where, ++ int size, u32 val) ++{ ++ struct mtk_pcie *pcie = sys_to_pcie(bus->sysdata); ++ unsigned int slot = PCI_SLOT(devfn); ++ u8 func = PCI_FUNC(devfn); ++ u32 address; ++ u32 data; ++ u32 num = 0; ++ ++ if (bus) ++ num = bus->number; ++ ++ address = (((where & 0xf00) >> 8) << 24) | ++ (num << 16) | (slot << 11) | (func << 8) | (where & 0xfc); ++ pcie_w32(pcie, address, CFGADDR); ++ data = pcie_r32(pcie, 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; ++ } ++ pcie_w32(pcie, data, CFGDATA); ++ ++ return PCIBIOS_SUCCESSFUL; ++} ++ ++static struct pci_ops mtk_pcie_ops = { ++ .read = pcie_config_read, ++ .write = pcie_config_write, ++}; ++ ++static int __init mtk_pcie_setup(int nr, struct pci_sys_data *sys) ++{ ++ struct mtk_pcie *pcie = sys_to_pcie(sys); ++ ++ request_resource(&ioport_resource, &pcie->pio); ++ request_resource(&iomem_resource, &pcie->mem); ++ ++ pci_add_resource_offset(&sys->resources, &pcie->mem, sys->mem_offset); ++ pci_add_resource_offset(&sys->resources, &pcie->pio, sys->io_offset); ++ pci_add_resource(&sys->resources, &pcie->busn); ++ ++ return 1; ++} ++ ++static struct pci_bus * __init mtk_pcie_scan_bus(int nr, ++ struct pci_sys_data *sys) ++{ ++ struct mtk_pcie *pcie = sys_to_pcie(sys); ++ struct pci_bus *bus; ++ ++ bus = pci_create_root_bus(pcie->dev, sys->busnr, &mtk_pcie_ops, sys, ++ &sys->resources); ++ if (!bus) ++ return NULL; ++ ++ pci_scan_child_bus(bus); ++ ++ return bus; ++} ++ ++static int __init mtk_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) ++{ ++ struct mtk_pcie *pcie = sys_to_pcie(dev->bus->sysdata); ++ struct mtk_pcie_port *port; ++ int irq = -1; ++ ++ mtk_foreach_port(pcie, port) ++ if (port->id == slot) ++ irq = port->irq; ++ ++ return irq; ++} ++ ++static void mtk_pcie_configure_phy(struct mtk_pcie *pcie, ++ struct mtk_pcie_port *port) ++{ ++ int i; ++ ++ for (i = 0; i < ARRAY_SIZE(mtk_phy_init); i++) { ++ void __iomem *phy_addr = port->phy_base + mtk_phy_init[i].reg; ++ u32 val = ioread32(phy_addr); ++ ++ val &= ~mtk_phy_init[i].mask; ++ val |= mtk_phy_init[i].val; ++ iowrite32(val, phy_addr); ++ } ++ usleep_range(5000, 6000); ++} ++ ++static void mtk_pcie_configure_rc(struct mtk_pcie *pcie, ++ struct mtk_pcie_port *port, ++ struct pci_bus *bus) ++{ ++ u32 val = 0; ++ ++ pcie_config_write(bus, ++ port->id << 3, ++ PCI_BASE_ADDRESS_0, 4, MEMORY_BASE); ++ ++ pcie_config_read(bus, ++ port->id << 3, PCI_BASE_ADDRESS_0, 4, &val); ++ ++ /* Configure RC Credit */ ++ pcie_config_read(bus, port->id << 3, 0x73c, 4, &val); ++ val &= ~(0x9fff) << 16; ++ val |= 0x806c << 16; ++ pcie_config_write(bus, port->id << 3, 0x73c, 4, val); ++ ++ /* Configure RC FTS number */ ++ pcie_config_read(bus, port->id << 3, 0x70c, 4, &val); ++ val &= ~(0xff3) << 8; ++ val |= 0x50 << 8; ++ pcie_config_write(bus, port->id << 3, 0x70c, 4, val); ++} ++ ++static int mtk_pcie_preinit(struct mtk_pcie *pcie) ++{ ++ struct mtk_pcie_port *port; ++ u32 val = 0; ++ struct pci_bus bus; ++ struct pci_sys_data sys; ++ ++ memset(&bus, 0, sizeof(bus)); ++ memset(&sys, 0, sizeof(sys)); ++ bus.sysdata = (void *)&sys; ++ sys.private_data = (void *)pcie; ++ ++ pcibios_min_io = 0; ++ pcibios_min_mem = 0; ++ ++ /* The PHY on Port 2 is shared with USB */ ++ if (pcie->port[2].enable) ++ regmap_update_bits(pcie->hifsys, HIFSYS_SYSCFG1, ++ HIFSYS_SYSCFG1_PHY2_MASK, 0x0); ++ ++ /* PCIe RC Reset */ ++ mtk_foreach_port(pcie, port) ++ if (port->enable) ++ reset_control_assert(port->rstc); ++ usleep_range(1000, 2000); ++ mtk_foreach_port(pcie, port) ++ if (port->enable) ++ reset_control_deassert(port->rstc); ++ usleep_range(1000, 2000); ++ ++ /* Configure PCIe PHY */ ++ mtk_foreach_port(pcie, port) ++ if (port->enable) ++ mtk_pcie_configure_phy(pcie, port); ++ ++ /* PCIe EP reset */ ++ val = 0; ++ mtk_foreach_port(pcie, port) ++ if (port->enable) ++ val |= mtk_pcie_port_data[port->id].perst_n; ++ pcie_w32(pcie, pcie_r32(pcie, PCICFG) | val, PCICFG); ++ usleep_range(1000, 2000); ++ pcie_w32(pcie, pcie_r32(pcie, PCICFG) & ~val, PCICFG); ++ usleep_range(1000, 2000); ++ msleep(100); ++ ++ /* check the link status */ ++ val = 0; ++ mtk_foreach_port(pcie, port) { ++ if (port->enable) { ++ u32 base = mtk_pcie_port_data[port->id].base; ++ ++ if ((pcie_r32(pcie, base + PCIE_SISTAT) & 0x1)) ++ port->link = 1; ++ else ++ reset_control_assert(port->rstc); ++ } ++ } ++ ++ mtk_foreach_port(pcie, port) ++ if (port->link) ++ pcie->pcie_card_link++; ++ ++ if (!pcie->pcie_card_link) ++ return -ENODEV; ++ ++ pcie_w32(pcie, pcie->mem_bus_addr, MEMBASE); ++ pcie_w32(pcie, pcie->io_bus_addr, IOBASE); ++ ++ mtk_foreach_port(pcie, port) { ++ if (port->link) { ++ u32 base = mtk_pcie_port_data[port->id].base; ++ u32 inte = mtk_pcie_port_data[port->id].interrupt_en; ++ ++ pcie_m32(pcie, 0, inte, PCIENA); ++ pcie_w32(pcie, 0x7fff0001, base + BAR0SETUP); ++ pcie_w32(pcie, MEMORY_BASE, base + IMBASEBAR0); ++ pcie_w32(pcie, 0x06040001, base + PCIE_CLASS); ++ } ++ } ++ ++ mtk_foreach_port(pcie, port) ++ if (port->link) ++ mtk_pcie_configure_rc(pcie, port, &bus); ++ ++ return 0; ++} ++ ++static int mtk_pcie_parse_dt(struct mtk_pcie *pcie) ++{ ++ struct device_node *np = pcie->dev->of_node, *port; ++ struct of_pci_range_parser parser; ++ struct of_pci_range range; ++ struct resource res; ++ int err; ++ ++ pcie->hifsys = syscon_regmap_lookup_by_phandle(np, "mediatek,hifsys"); ++ if (IS_ERR(pcie->hifsys)) { ++ dev_err(pcie->dev, "missing \"mediatek,hifsys\" phandle\n"); ++ return PTR_ERR(pcie->hifsys); ++ } ++ ++ if (of_pci_range_parser_init(&parser, np)) { ++ dev_err(pcie->dev, "missing \"ranges\" property\n"); ++ return -EINVAL; ++ } ++ ++ for_each_of_pci_range(&parser, &range) { ++ err = of_pci_range_to_resource(&range, np, &res); ++ if (err < 0) { ++ dev_err(pcie->dev, "failed to read resource range\n"); ++ return err; ++ } ++ ++ switch (res.flags & IORESOURCE_TYPE_BITS) { ++ case IORESOURCE_IO: ++ memcpy(&pcie->pio, &res, sizeof(res)); ++ pcie->pio.start = (resource_size_t)range.pci_addr; ++ pcie->pio.end = (resource_size_t) ++ (range.pci_addr + range.size - 1); ++ pcie->io_bus_addr = (resource_size_t)range.cpu_addr; ++ break; ++ ++ case IORESOURCE_MEM: ++ if (res.flags & IORESOURCE_PREFETCH) { ++ memcpy(&pcie->prefetch, &res, sizeof(res)); ++ pcie->prefetch.name = "prefetchable"; ++ pcie->prefetch.start = ++ (resource_size_t)range.pci_addr; ++ pcie->prefetch.end = (resource_size_t) ++ (range.pci_addr + range.size - 1); ++ } else { ++ memcpy(&pcie->mem, &res, sizeof(res)); ++ pcie->mem.name = "non-prefetchable"; ++ pcie->mem.start = (resource_size_t) ++ range.pci_addr; ++ pcie->prefetch.end = (resource_size_t) ++ (range.pci_addr + range.size - 1); ++ pcie->mem_bus_addr = (resource_size_t) ++ range.cpu_addr; ++ } ++ break; ++ } ++ } ++ ++ err = of_pci_parse_bus_range(np, &pcie->busn); ++ if (err < 0) { ++ dev_err(pcie->dev, "failed to parse ranges property: %d\n", ++ err); ++ pcie->busn.name = np->name; ++ pcie->busn.start = 0; ++ pcie->busn.end = 0xff; ++ pcie->busn.flags = IORESOURCE_BUS; ++ } ++ ++ /* parse root ports */ ++ for_each_child_of_node(np, port) { ++ unsigned int index; ++ char rst[] = "pcie0"; ++ ++ err = of_pci_get_devfn(port); ++ if (err < 0) { ++ dev_err(pcie->dev, "failed to parse address: %d\n", ++ err); ++ return err; ++ } ++ ++ index = PCI_SLOT(err); ++ if (index > MAX_PORT_NUM) { ++ dev_err(pcie->dev, "invalid port number: %d\n", index); ++ continue; ++ } ++ index--; ++ pcie->port[index].id = index; ++ ++ if (!of_device_is_available(port)) ++ continue; ++ ++ rst[4] += index; ++ pcie->port[index].rstc = devm_reset_control_get(pcie->dev, ++ rst); ++ if (!IS_ERR(pcie->port[index].rstc)) ++ pcie->port[index].enable = 1; ++ } ++ return 0; ++} ++ ++static int mtk_pcie_get_resources(struct mtk_pcie *pcie) ++{ ++ struct platform_device *pdev = to_platform_device(pcie->dev); ++ struct mtk_pcie_port *port; ++ struct resource *res; ++ ++ pcie->clk = devm_clk_get(&pdev->dev, "pcie"); ++ if (IS_ERR(pcie->clk)) { ++ dev_err(&pdev->dev, "Failed to get pcie clk\n"); ++ return PTR_ERR(pcie->clk); ++ } ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ pcie->pcie_base = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(pcie->pcie_base)) { ++ dev_err(&pdev->dev, "Failed to get pcie range\n"); ++ return PTR_ERR(pcie->pcie_base); ++ } ++ ++ mtk_foreach_port(pcie, port) { ++ if (!port->enable) ++ continue; ++ res = platform_get_resource(pdev, IORESOURCE_MEM, port->id + 1); ++ port->phy_base = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(port->phy_base)) { ++ dev_err(&pdev->dev, "Failed to get pcie phy%d range %p\n", ++ port->id, port->phy_base); ++ return PTR_ERR(port->phy_base); ++ } ++ port->irq = platform_get_irq(pdev, port->id); ++ } ++ ++ return clk_prepare_enable(pcie->clk); ++} ++ ++static int mtk_pcie_probe(struct platform_device *pdev) ++{ ++ struct mtk_pcie *pcie; ++ struct hw_pci hw; ++ int ret; ++ ++ pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL); ++ if (!pcie) ++ return -ENOMEM; ++ ++ pcie->dev = &pdev->dev; ++ ret = mtk_pcie_parse_dt(pcie); ++ if (ret < 0) ++ return ret; ++ ++ pm_runtime_enable(&pdev->dev); ++ pm_runtime_get_sync(&pdev->dev); ++ ++ ret = mtk_pcie_get_resources(pcie); ++ if (ret < 0) { ++ dev_err(&pdev->dev, "failed to request resources: %d\n", ret); ++ goto err_out; ++ } ++ ++ ret = mtk_pcie_preinit(pcie); ++ if (ret) ++ return ret; ++ ++ memset(&hw, 0, sizeof(hw)); ++ hw.nr_controllers = 1; ++ hw.private_data = (void **)&pcie; ++ hw.setup = mtk_pcie_setup; ++ hw.map_irq = mtk_pcie_map_irq; ++ hw.scan = mtk_pcie_scan_bus; ++ ++ pci_common_init_dev(pcie->dev, &hw); ++ platform_set_drvdata(pdev, pcie); ++ ++ return 0; ++ ++err_out: ++ clk_disable_unprepare(pcie->clk); ++ pm_runtime_put_sync(&pdev->dev); ++ pm_runtime_disable(&pdev->dev); ++ ++ return ret; ++} ++ ++static const struct of_device_id mtk_pcie_ids[] = { ++ { .compatible = "mediatek,mt2701-pcie" }, ++ { .compatible = "mediatek,mt7623-pcie" }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, mtk_pcie_ids); ++ ++static struct platform_driver mtk_pcie_driver = { ++ .probe = mtk_pcie_probe, ++ .driver = { ++ .name = "mediatek-pcie", ++ .owner = THIS_MODULE, ++ .of_match_table = of_match_ptr(mtk_pcie_ids), ++ }, ++}; ++ ++static int __init mtk_pcie_init(void) ++{ ++ return platform_driver_register(&mtk_pcie_driver); ++} ++ ++module_init(mtk_pcie_init); +-- +1.7.10.4 + |