diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0534-PCI-brcmstb-Add-Broadcom-STB-PCIe-host-controller-dr.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0534-PCI-brcmstb-Add-Broadcom-STB-PCIe-host-controller-dr.patch | 1187 |
1 files changed, 1187 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0534-PCI-brcmstb-Add-Broadcom-STB-PCIe-host-controller-dr.patch b/target/linux/brcm2708/patches-4.19/950-0534-PCI-brcmstb-Add-Broadcom-STB-PCIe-host-controller-dr.patch new file mode 100644 index 0000000000..536bc32fe4 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0534-PCI-brcmstb-Add-Broadcom-STB-PCIe-host-controller-dr.patch @@ -0,0 +1,1187 @@ +From f44f216d79d668049e28f696840c7761017e3406 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Tue, 19 Feb 2019 22:06:59 +0000 +Subject: [PATCH 534/703] PCI: brcmstb: Add Broadcom STB PCIe host controller + driver + +This commit adds the basic Broadcom STB PCIe controller. Missing is +the ability to process MSI and also handle dma-ranges for inbound +memory accesses. These two functionalities are added in subsequent +commits. + +The PCIe block contains an MDIO interface. This is a local interface +only accessible by the PCIe controller. It cannot be used or shared +by any other HW. As such, the small amount of code for this +controller is included in this driver as there is little upside to put +it elsewhere. + +Signed-off-by: Jim Quinlan <jim2101024@gmail.com> +--- + drivers/pci/controller/Kconfig | 9 + + drivers/pci/controller/Makefile | 2 +- + drivers/pci/controller/pcie-brcmstb.c | 1097 +++++++++++++++++++++++++ + include/soc/brcmstb/memory_api.h | 25 + + 4 files changed, 1132 insertions(+), 1 deletion(-) + create mode 100644 drivers/pci/controller/pcie-brcmstb.c + create mode 100644 include/soc/brcmstb/memory_api.h + +--- a/drivers/pci/controller/Kconfig ++++ b/drivers/pci/controller/Kconfig +@@ -278,5 +278,14 @@ config VMD + To compile this driver as a module, choose M here: the + module will be called vmd. + ++config PCIE_BRCMSTB ++ tristate "Broadcom Brcmstb PCIe platform host driver" ++ depends on ARCH_BRCMSTB || BMIPS_GENERIC ++ depends on OF ++ depends on SOC_BRCMSTB ++ default ARCH_BRCMSTB || BMIPS_GENERIC ++ help ++ Adds support for Broadcom Settop Box PCIe host controller. ++ + source "drivers/pci/controller/dwc/Kconfig" + endmenu +--- a/drivers/pci/controller/Makefile ++++ b/drivers/pci/controller/Makefile +@@ -28,11 +28,11 @@ obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie + obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o + obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o + obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o ++obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o + obj-$(CONFIG_VMD) += vmd.o + # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW + obj-y += dwc/ + +- + # The following drivers are for devices that use the generic ACPI + # pci_root.c driver but don't support standard ECAM config access. + # They contain MCFG quirks to replace the generic ECAM accessors with +--- /dev/null ++++ b/drivers/pci/controller/pcie-brcmstb.c +@@ -0,0 +1,1097 @@ ++// SPDX-License-Identifier: GPL-2.0 ++/* Copyright (C) 2009 - 2017 Broadcom */ ++ ++#include <linux/clk.h> ++#include <linux/compiler.h> ++#include <linux/delay.h> ++#include <linux/init.h> ++#include <linux/interrupt.h> ++#include <linux/io.h> ++#include <linux/ioport.h> ++#include <linux/irqdomain.h> ++#include <linux/kernel.h> ++#include <linux/list.h> ++#include <linux/log2.h> ++#include <linux/module.h> ++#include <linux/of_address.h> ++#include <linux/of_irq.h> ++#include <linux/of_pci.h> ++#include <linux/of_platform.h> ++#include <linux/pci.h> ++#include <linux/printk.h> ++#include <linux/sizes.h> ++#include <linux/slab.h> ++#include <soc/brcmstb/memory_api.h> ++#include <linux/string.h> ++#include <linux/types.h> ++#include "../pci.h" ++ ++/* BRCM_PCIE_CAP_REGS - Offset for the mandatory capability config regs */ ++#define BRCM_PCIE_CAP_REGS 0x00ac ++ ++/* ++ * Broadcom Settop Box PCIe Register Offsets. The names are from ++ * the chip's RDB and we use them here so that a script can correlate ++ * this code and the RDB to prevent discrepancies. ++ */ ++#define PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1 0x0188 ++#define PCIE_RC_CFG_PRIV1_ID_VAL3 0x043c ++#define PCIE_RC_DL_MDIO_ADDR 0x1100 ++#define PCIE_RC_DL_MDIO_WR_DATA 0x1104 ++#define PCIE_RC_DL_MDIO_RD_DATA 0x1108 ++#define PCIE_MISC_MISC_CTRL 0x4008 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LO 0x400c ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_HI 0x4010 ++#define PCIE_MISC_RC_BAR1_CONFIG_LO 0x402c ++#define PCIE_MISC_RC_BAR2_CONFIG_LO 0x4034 ++#define PCIE_MISC_RC_BAR2_CONFIG_HI 0x4038 ++#define PCIE_MISC_RC_BAR3_CONFIG_LO 0x403c ++#define PCIE_MISC_PCIE_CTRL 0x4064 ++#define PCIE_MISC_PCIE_STATUS 0x4068 ++#define PCIE_MISC_REVISION 0x406c ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT 0x4070 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI 0x4080 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI 0x4084 ++#define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204 ++#define PCIE_INTR2_CPU_BASE 0x4300 ++ ++/* ++ * Broadcom Settop Box PCIe Register Field shift and mask info. The ++ * names are from the chip's RDB and we use them here so that a script ++ * can correlate this code and the RDB to prevent discrepancies. ++ */ ++#define PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK 0xc ++#define PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_SHIFT 0x2 ++#define PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK 0xffffff ++#define PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_SHIFT 0x0 ++#define PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK 0x1000 ++#define PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_SHIFT 0xc ++#define PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK 0x2000 ++#define PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_SHIFT 0xd ++#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK 0x300000 ++#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_SHIFT 0x14 ++#define PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK 0xf8000000 ++#define PCIE_MISC_MISC_CTRL_SCB0_SIZE_SHIFT 0x1b ++#define PCIE_MISC_MISC_CTRL_SCB1_SIZE_MASK 0x7c00000 ++#define PCIE_MISC_MISC_CTRL_SCB1_SIZE_SHIFT 0x16 ++#define PCIE_MISC_MISC_CTRL_SCB2_SIZE_MASK 0x1f ++#define PCIE_MISC_MISC_CTRL_SCB2_SIZE_SHIFT 0x0 ++#define PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK 0x1f ++#define PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_SHIFT 0x0 ++#define PCIE_MISC_RC_BAR2_CONFIG_LO_SIZE_MASK 0x1f ++#define PCIE_MISC_RC_BAR2_CONFIG_LO_SIZE_SHIFT 0x0 ++#define PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK 0x1f ++#define PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_SHIFT 0x0 ++#define PCIE_MISC_PCIE_CTRL_PCIE_PERSTB_MASK 0x4 ++#define PCIE_MISC_PCIE_CTRL_PCIE_PERSTB_SHIFT 0x2 ++#define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK 0x1 ++#define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_SHIFT 0x0 ++#define PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK 0x80 ++#define PCIE_MISC_PCIE_STATUS_PCIE_PORT_SHIFT 0x7 ++#define PCIE_MISC_PCIE_STATUS_PCIE_DL_ACTIVE_MASK 0x20 ++#define PCIE_MISC_PCIE_STATUS_PCIE_DL_ACTIVE_SHIFT 0x5 ++#define PCIE_MISC_PCIE_STATUS_PCIE_PHYLINKUP_MASK 0x10 ++#define PCIE_MISC_PCIE_STATUS_PCIE_PHYLINKUP_SHIFT 0x4 ++#define PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK 0x40 ++#define PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_SHIFT 0x6 ++#define PCIE_MISC_REVISION_MAJMIN_MASK 0xffff ++#define PCIE_MISC_REVISION_MAJMIN_SHIFT 0 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_LIMIT_MASK 0xfff00000 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_LIMIT_SHIFT 0x14 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK 0xfff0 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_SHIFT 0x4 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_NUM_MASK_BITS 0xc ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI_BASE_MASK 0xff ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI_BASE_SHIFT 0x0 ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI_LIMIT_MASK 0xff ++#define PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI_LIMIT_SHIFT 0x0 ++#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2 ++#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_SHIFT 0x1 ++#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000 ++#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_SHIFT 0x1b ++#define PCIE_RGR1_SW_INIT_1_PERST_MASK 0x1 ++#define PCIE_RGR1_SW_INIT_1_PERST_SHIFT 0x0 ++ ++#define BRCM_NUM_PCIE_OUT_WINS 0x4 ++#define BRCM_MAX_SCB 0x4 ++ ++#define BRCM_MSI_TARGET_ADDR_LT_4GB 0x0fffffffcULL ++#define BRCM_MSI_TARGET_ADDR_GT_4GB 0xffffffffcULL ++ ++#define BURST_SIZE_128 0 ++#define BURST_SIZE_256 1 ++#define BURST_SIZE_512 2 ++ ++/* Offsets from PCIE_INTR2_CPU_BASE */ ++#define STATUS 0x0 ++#define SET 0x4 ++#define CLR 0x8 ++#define MASK_STATUS 0xc ++#define MASK_SET 0x10 ++#define MASK_CLR 0x14 ++ ++#define PCIE_BUSNUM_SHIFT 20 ++#define PCIE_SLOT_SHIFT 15 ++#define PCIE_FUNC_SHIFT 12 ++ ++#if defined(__BIG_ENDIAN) ++#define DATA_ENDIAN 2 /* PCIe->DDR inbound traffic */ ++#define MMIO_ENDIAN 2 /* CPU->PCIe outbound traffic */ ++#else ++#define DATA_ENDIAN 0 ++#define MMIO_ENDIAN 0 ++#endif ++ ++#define MDIO_PORT0 0x0 ++#define MDIO_DATA_MASK 0x7fffffff ++#define MDIO_DATA_SHIFT 0x0 ++#define MDIO_PORT_MASK 0xf0000 ++#define MDIO_PORT_SHIFT 0x16 ++#define MDIO_REGAD_MASK 0xffff ++#define MDIO_REGAD_SHIFT 0x0 ++#define MDIO_CMD_MASK 0xfff00000 ++#define MDIO_CMD_SHIFT 0x14 ++#define MDIO_CMD_READ 0x1 ++#define MDIO_CMD_WRITE 0x0 ++#define MDIO_DATA_DONE_MASK 0x80000000 ++#define MDIO_RD_DONE(x) (((x) & MDIO_DATA_DONE_MASK) ? 1 : 0) ++#define MDIO_WT_DONE(x) (((x) & MDIO_DATA_DONE_MASK) ? 0 : 1) ++#define SSC_REGS_ADDR 0x1100 ++#define SET_ADDR_OFFSET 0x1f ++#define SSC_CNTL_OFFSET 0x2 ++#define SSC_CNTL_OVRD_EN_MASK 0x8000 ++#define SSC_CNTL_OVRD_EN_SHIFT 0xf ++#define SSC_CNTL_OVRD_VAL_MASK 0x4000 ++#define SSC_CNTL_OVRD_VAL_SHIFT 0xe ++#define SSC_STATUS_OFFSET 0x1 ++#define SSC_STATUS_SSC_MASK 0x400 ++#define SSC_STATUS_SSC_SHIFT 0xa ++#define SSC_STATUS_PLL_LOCK_MASK 0x800 ++#define SSC_STATUS_PLL_LOCK_SHIFT 0xb ++ ++#define IDX_ADDR(pcie) \ ++ ((pcie)->reg_offsets[EXT_CFG_INDEX]) ++#define DATA_ADDR(pcie) \ ++ ((pcie)->reg_offsets[EXT_CFG_DATA]) ++#define PCIE_RGR1_SW_INIT_1(pcie) \ ++ ((pcie)->reg_offsets[RGR1_SW_INIT_1]) ++ ++enum { ++ RGR1_SW_INIT_1, ++ EXT_CFG_INDEX, ++ EXT_CFG_DATA, ++}; ++ ++enum { ++ RGR1_SW_INIT_1_INIT_MASK, ++ RGR1_SW_INIT_1_INIT_SHIFT, ++ RGR1_SW_INIT_1_PERST_MASK, ++ RGR1_SW_INIT_1_PERST_SHIFT, ++}; ++ ++enum pcie_type { ++ BCM7425, ++ BCM7435, ++ GENERIC, ++ BCM7278, ++}; ++ ++struct brcm_window { ++ dma_addr_t pcie_addr; ++ phys_addr_t cpu_addr; ++ dma_addr_t size; ++}; ++ ++/* Internal PCIe Host Controller Information.*/ ++struct brcm_pcie { ++ struct device *dev; ++ void __iomem *base; ++ struct list_head resources; ++ int irq; ++ struct clk *clk; ++ struct pci_bus *root_bus; ++ struct device_node *dn; ++ int id; ++ bool suspended; ++ int num_out_wins; ++ bool ssc; ++ int gen; ++ struct brcm_window out_wins[BRCM_NUM_PCIE_OUT_WINS]; ++ unsigned int rev; ++ const int *reg_offsets; ++ const int *reg_field_info; ++ enum pcie_type type; ++}; ++ ++struct pcie_cfg_data { ++ const int *reg_field_info; ++ const int *offsets; ++ const enum pcie_type type; ++}; ++ ++static const int pcie_reg_field_info[] = { ++ [RGR1_SW_INIT_1_INIT_MASK] = 0x2, ++ [RGR1_SW_INIT_1_INIT_SHIFT] = 0x1, ++}; ++ ++static const int pcie_reg_field_info_bcm7278[] = { ++ [RGR1_SW_INIT_1_INIT_MASK] = 0x1, ++ [RGR1_SW_INIT_1_INIT_SHIFT] = 0x0, ++}; ++ ++static const int pcie_offset_bcm7425[] = { ++ [RGR1_SW_INIT_1] = 0x8010, ++ [EXT_CFG_INDEX] = 0x8300, ++ [EXT_CFG_DATA] = 0x8304, ++}; ++ ++static const struct pcie_cfg_data bcm7425_cfg = { ++ .reg_field_info = pcie_reg_field_info, ++ .offsets = pcie_offset_bcm7425, ++ .type = BCM7425, ++}; ++ ++static const int pcie_offsets[] = { ++ [RGR1_SW_INIT_1] = 0x9210, ++ [EXT_CFG_INDEX] = 0x9000, ++ [EXT_CFG_DATA] = 0x9004, ++}; ++ ++static const struct pcie_cfg_data bcm7435_cfg = { ++ .reg_field_info = pcie_reg_field_info, ++ .offsets = pcie_offsets, ++ .type = BCM7435, ++}; ++ ++static const struct pcie_cfg_data generic_cfg = { ++ .reg_field_info = pcie_reg_field_info, ++ .offsets = pcie_offsets, ++ .type = GENERIC, ++}; ++ ++static const int pcie_offset_bcm7278[] = { ++ [RGR1_SW_INIT_1] = 0xc010, ++ [EXT_CFG_INDEX] = 0x9000, ++ [EXT_CFG_DATA] = 0x9004, ++}; ++ ++static const struct pcie_cfg_data bcm7278_cfg = { ++ .reg_field_info = pcie_reg_field_info_bcm7278, ++ .offsets = pcie_offset_bcm7278, ++ .type = BCM7278, ++}; ++ ++static void __iomem *brcm_pcie_map_conf(struct pci_bus *bus, unsigned int devfn, ++ int where); ++ ++static struct pci_ops brcm_pcie_ops = { ++ .map_bus = brcm_pcie_map_conf, ++ .read = pci_generic_config_read, ++ .write = pci_generic_config_write, ++}; ++ ++#if defined(CONFIG_MIPS) ++/* Broadcom MIPs HW implicitly does the swapping if necessary */ ++#define bcm_readl(a) __raw_readl(a) ++#define bcm_writel(d, a) __raw_writel(d, a) ++#define bcm_readw(a) __raw_readw(a) ++#define bcm_writew(d, a) __raw_writew(d, a) ++#else ++#define bcm_readl(a) readl(a) ++#define bcm_writel(d, a) writel(d, a) ++#define bcm_readw(a) readw(a) ++#define bcm_writew(d, a) writew(d, a) ++#endif ++ ++/* These macros extract/insert fields to host controller's register set. */ ++#define RD_FLD(base, reg, field) \ ++ rd_fld(base + reg, reg##_##field##_MASK, reg##_##field##_SHIFT) ++#define WR_FLD(base, reg, field, val) \ ++ wr_fld(base + reg, reg##_##field##_MASK, reg##_##field##_SHIFT, val) ++#define WR_FLD_RB(base, reg, field, val) \ ++ wr_fld_rb(base + reg, reg##_##field##_MASK, reg##_##field##_SHIFT, val) ++#define WR_FLD_WITH_OFFSET(base, off, reg, field, val) \ ++ wr_fld(base + reg + off, reg##_##field##_MASK, \ ++ reg##_##field##_SHIFT, val) ++#define EXTRACT_FIELD(val, reg, field) \ ++ ((val & reg##_##field##_MASK) >> reg##_##field##_SHIFT) ++#define INSERT_FIELD(val, reg, field, field_val) \ ++ ((val & ~reg##_##field##_MASK) | \ ++ (reg##_##field##_MASK & (field_val << reg##_##field##_SHIFT))) ++ ++static phys_addr_t scb_size[BRCM_MAX_SCB]; ++static int num_memc; ++static int num_pcie; ++static DEFINE_MUTEX(brcm_pcie_lock); ++ ++static u32 rd_fld(void __iomem *p, u32 mask, int shift) ++{ ++ return (bcm_readl(p) & mask) >> shift; ++} ++ ++static void wr_fld(void __iomem *p, u32 mask, int shift, u32 val) ++{ ++ u32 reg = bcm_readl(p); ++ ++ reg = (reg & ~mask) | ((val << shift) & mask); ++ bcm_writel(reg, p); ++} ++ ++static void wr_fld_rb(void __iomem *p, u32 mask, int shift, u32 val) ++{ ++ wr_fld(p, mask, shift, val); ++ (void)bcm_readl(p); ++} ++ ++static const char *link_speed_to_str(int s) ++{ ++ switch (s) { ++ case 1: ++ return "2.5"; ++ case 2: ++ return "5.0"; ++ case 3: ++ return "8.0"; ++ default: ++ break; ++ } ++ return "???"; ++} ++ ++/* ++ * The roundup_pow_of_two() from log2.h invokes ++ * __roundup_pow_of_two(unsigned long), but we really need a ++ * such a function to take a native u64 since unsigned long ++ * is 32 bits on some configurations. So we provide this helper ++ * function below. ++ */ ++static u64 roundup_pow_of_two_64(u64 n) ++{ ++ return 1ULL << fls64(n - 1); ++} ++ ++/* ++ * This is to convert the size of the inbound "BAR" region to the ++ * non-linear values of PCIE_X_MISC_RC_BAR[123]_CONFIG_LO.SIZE ++ */ ++int encode_ibar_size(u64 size) ++{ ++ int log2_in = ilog2(size); ++ ++ if (log2_in >= 12 && log2_in <= 15) ++ /* Covers 4KB to 32KB (inclusive) */ ++ return (log2_in - 12) + 0x1c; ++ else if (log2_in >= 16 && log2_in <= 37) ++ /* Covers 64KB to 32GB, (inclusive) */ ++ return log2_in - 15; ++ /* Something is awry so disable */ ++ return 0; ++} ++ ++static u32 mdio_form_pkt(int port, int regad, int cmd) ++{ ++ u32 pkt = 0; ++ ++ pkt |= (port << MDIO_PORT_SHIFT) & MDIO_PORT_MASK; ++ pkt |= (regad << MDIO_REGAD_SHIFT) & MDIO_REGAD_MASK; ++ pkt |= (cmd << MDIO_CMD_SHIFT) & MDIO_CMD_MASK; ++ ++ return pkt; ++} ++ ++/* negative return value indicates error */ ++static int mdio_read(void __iomem *base, u8 port, u8 regad) ++{ ++ int tries; ++ u32 data; ++ ++ bcm_writel(mdio_form_pkt(port, regad, MDIO_CMD_READ), ++ base + PCIE_RC_DL_MDIO_ADDR); ++ bcm_readl(base + PCIE_RC_DL_MDIO_ADDR); ++ ++ data = bcm_readl(base + PCIE_RC_DL_MDIO_RD_DATA); ++ for (tries = 0; !MDIO_RD_DONE(data) && tries < 10; tries++) { ++ udelay(10); ++ data = bcm_readl(base + PCIE_RC_DL_MDIO_RD_DATA); ++ } ++ ++ return MDIO_RD_DONE(data) ++ ? (data & MDIO_DATA_MASK) >> MDIO_DATA_SHIFT ++ : -EIO; ++} ++ ++/* negative return value indicates error */ ++static int mdio_write(void __iomem *base, u8 port, u8 regad, u16 wrdata) ++{ ++ int tries; ++ u32 data; ++ ++ bcm_writel(mdio_form_pkt(port, regad, MDIO_CMD_WRITE), ++ base + PCIE_RC_DL_MDIO_ADDR); ++ bcm_readl(base + PCIE_RC_DL_MDIO_ADDR); ++ bcm_writel(MDIO_DATA_DONE_MASK | wrdata, ++ base + PCIE_RC_DL_MDIO_WR_DATA); ++ ++ data = bcm_readl(base + PCIE_RC_DL_MDIO_WR_DATA); ++ for (tries = 0; !MDIO_WT_DONE(data) && tries < 10; tries++) { ++ udelay(10); ++ data = bcm_readl(base + PCIE_RC_DL_MDIO_WR_DATA); ++ } ++ ++ return MDIO_WT_DONE(data) ? 0 : -EIO; ++} ++ ++/* ++ * Configures device for Spread Spectrum Clocking (SSC) mode; a negative ++ * return value indicates error. ++ */ ++static int set_ssc(void __iomem *base) ++{ ++ int tmp; ++ u16 wrdata; ++ int pll, ssc; ++ ++ tmp = mdio_write(base, MDIO_PORT0, SET_ADDR_OFFSET, SSC_REGS_ADDR); ++ if (tmp < 0) ++ return tmp; ++ ++ tmp = mdio_read(base, MDIO_PORT0, SSC_CNTL_OFFSET); ++ if (tmp < 0) ++ return tmp; ++ ++ wrdata = INSERT_FIELD(tmp, SSC_CNTL_OVRD, EN, 1); ++ wrdata = INSERT_FIELD(wrdata, SSC_CNTL_OVRD, VAL, 1); ++ tmp = mdio_write(base, MDIO_PORT0, SSC_CNTL_OFFSET, wrdata); ++ if (tmp < 0) ++ return tmp; ++ ++ usleep_range(1000, 2000); ++ tmp = mdio_read(base, MDIO_PORT0, SSC_STATUS_OFFSET); ++ if (tmp < 0) ++ return tmp; ++ ++ ssc = EXTRACT_FIELD(tmp, SSC_STATUS, SSC); ++ pll = EXTRACT_FIELD(tmp, SSC_STATUS, PLL_LOCK); ++ ++ return (ssc && pll) ? 0 : -EIO; ++} ++ ++/* Limits operation to a specific generation (1, 2, or 3) */ ++static void set_gen(void __iomem *base, int gen) ++{ ++ u32 lnkcap = bcm_readl(base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCAP); ++ u16 lnkctl2 = bcm_readw(base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCTL2); ++ ++ lnkcap = (lnkcap & ~PCI_EXP_LNKCAP_SLS) | gen; ++ bcm_writel(lnkcap, base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCAP); ++ ++ lnkctl2 = (lnkctl2 & ~0xf) | gen; ++ bcm_writew(lnkctl2, base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKCTL2); ++} ++ ++static void brcm_pcie_set_outbound_win(struct brcm_pcie *pcie, ++ unsigned int win, phys_addr_t cpu_addr, ++ dma_addr_t pcie_addr, dma_addr_t size) ++{ ++ void __iomem *base = pcie->base; ++ phys_addr_t cpu_addr_mb, limit_addr_mb; ++ u32 tmp; ++ ++ /* Set the base of the pcie_addr window */ ++ bcm_writel(lower_32_bits(pcie_addr) + MMIO_ENDIAN, ++ base + PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LO + (win * 8)); ++ bcm_writel(upper_32_bits(pcie_addr), ++ base + PCIE_MISC_CPU_2_PCIE_MEM_WIN0_HI + (win * 8)); ++ ++ cpu_addr_mb = cpu_addr >> 20; ++ limit_addr_mb = (cpu_addr + size - 1) >> 20; ++ ++ /* Write the addr base low register */ ++ WR_FLD_WITH_OFFSET(base, (win * 4), ++ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT, ++ BASE, cpu_addr_mb); ++ /* Write the addr limit low register */ ++ WR_FLD_WITH_OFFSET(base, (win * 4), ++ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT, ++ LIMIT, limit_addr_mb); ++ ++ if (pcie->type != BCM7435 && pcie->type != BCM7425) { ++ /* Write the cpu addr high register */ ++ tmp = (u32)(cpu_addr_mb >> ++ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_NUM_MASK_BITS); ++ WR_FLD_WITH_OFFSET(base, (win * 8), ++ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_HI, ++ BASE, tmp); ++ /* Write the cpu limit high register */ ++ tmp = (u32)(limit_addr_mb >> ++ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_NUM_MASK_BITS); ++ WR_FLD_WITH_OFFSET(base, (win * 8), ++ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI, ++ LIMIT, tmp); ++ } ++} ++ ++/* Configuration space read/write support */ ++static int cfg_index(int busnr, int devfn, int reg) ++{ ++ return ((PCI_SLOT(devfn) & 0x1f) << PCIE_SLOT_SHIFT) ++ | ((PCI_FUNC(devfn) & 0x07) << PCIE_FUNC_SHIFT) ++ | (busnr << PCIE_BUSNUM_SHIFT) ++ | (reg & ~3); ++} ++ ++/* The controller is capable of serving in both RC and EP roles */ ++static bool brcm_pcie_rc_mode(struct brcm_pcie *pcie) ++{ ++ void __iomem *base = pcie->base; ++ u32 val = bcm_readl(base + PCIE_MISC_PCIE_STATUS); ++ ++ return !!EXTRACT_FIELD(val, PCIE_MISC_PCIE_STATUS, PCIE_PORT); ++} ++ ++static bool brcm_pcie_link_up(struct brcm_pcie *pcie) ++{ ++ void __iomem *base = pcie->base; ++ u32 val = bcm_readl(base + PCIE_MISC_PCIE_STATUS); ++ u32 dla = EXTRACT_FIELD(val, PCIE_MISC_PCIE_STATUS, PCIE_DL_ACTIVE); ++ u32 plu = EXTRACT_FIELD(val, PCIE_MISC_PCIE_STATUS, PCIE_PHYLINKUP); ++ ++ return (dla && plu) ? true : false; ++} ++ ++static void __iomem *brcm_pcie_map_conf(struct pci_bus *bus, unsigned int devfn, ++ int where) ++{ ++ struct brcm_pcie *pcie = bus->sysdata; ++ void __iomem *base = pcie->base; ++ int idx; ++ ++ /* Accesses to the RC go right to the RC registers if slot==0 */ ++ if (pci_is_root_bus(bus)) ++ return PCI_SLOT(devfn) ? NULL : base + where; ++ ++ /* For devices, write to the config space index register */ ++ idx = cfg_index(bus->number, devfn, where); ++ bcm_writel(idx, pcie->base + IDX_ADDR(pcie)); ++ return base + DATA_ADDR(pcie) + (where & 0x3); ++} ++ ++static inline void brcm_pcie_bridge_sw_init_set(struct brcm_pcie *pcie, ++ unsigned int val) ++{ ++ unsigned int shift = pcie->reg_field_info[RGR1_SW_INIT_1_INIT_SHIFT]; ++ u32 mask = pcie->reg_field_info[RGR1_SW_INIT_1_INIT_MASK]; ++ ++ wr_fld_rb(pcie->base + PCIE_RGR1_SW_INIT_1(pcie), mask, shift, val); ++} ++ ++static inline void brcm_pcie_perst_set(struct brcm_pcie *pcie, ++ unsigned int val) ++{ ++ if (pcie->type != BCM7278) ++ wr_fld_rb(pcie->base + PCIE_RGR1_SW_INIT_1(pcie), ++ PCIE_RGR1_SW_INIT_1_PERST_MASK, ++ PCIE_RGR1_SW_INIT_1_PERST_SHIFT, val); ++ else ++ /* Assert = 0, de-assert = 1 on 7278 */ ++ WR_FLD_RB(pcie->base, PCIE_MISC_PCIE_CTRL, PCIE_PERSTB, !val); ++} ++ ++static int brcm_pcie_add_controller(struct brcm_pcie *pcie) ++{ ++ int i, ret = 0; ++ ++ mutex_lock(&brcm_pcie_lock); ++ if (num_pcie > 0) { ++ num_pcie++; ++ goto done; ++ } ++ ++ /* Determine num_memc and their sizes */ ++ for (i = 0, num_memc = 0; i < BRCM_MAX_SCB; i++) { ++ u64 size = brcmstb_memory_memc_size(i); ++ ++ if (size == (u64)-1) { ++ dev_err(pcie->dev, "cannot get memc%d size\n", i); ++ ret = -EINVAL; ++ goto done; ++ } else if (size) { ++ scb_size[i] = roundup_pow_of_two_64(size); ++ num_memc++; ++ } else { ++ break; ++ } ++ } ++ if (!ret && num_memc == 0) { ++ ret = -EINVAL; ++ goto done; ++ } ++ ++ num_pcie++; ++done: ++ mutex_unlock(&brcm_pcie_lock); ++ return ret; ++} ++ ++static void brcm_pcie_remove_controller(struct brcm_pcie *pcie) ++{ ++ mutex_lock(&brcm_pcie_lock); ++ if (--num_pcie == 0) ++ num_memc = 0; ++ mutex_unlock(&brcm_pcie_lock); ++} ++ ++static int brcm_pcie_parse_request_of_pci_ranges(struct brcm_pcie *pcie) ++{ ++ struct resource_entry *win; ++ int ret; ++ ++ ret = devm_of_pci_get_host_bridge_resources(pcie->dev, 0, 0xff, ++ &pcie->resources, NULL); ++ if (ret) { ++ dev_err(pcie->dev, "failed to get host resources\n"); ++ return ret; ++ } ++ ++ resource_list_for_each_entry(win, &pcie->resources) { ++ struct resource *parent, *res = win->res; ++ dma_addr_t offset = (dma_addr_t)win->offset; ++ ++ if (resource_type(res) == IORESOURCE_IO) { ++ parent = &ioport_resource; ++ } else if (resource_type(res) == IORESOURCE_MEM) { ++ if (pcie->num_out_wins >= BRCM_NUM_PCIE_OUT_WINS) { ++ dev_err(pcie->dev, "too many outbound wins\n"); ++ return -EINVAL; ++ } ++ pcie->out_wins[pcie->num_out_wins].cpu_addr ++ = (phys_addr_t)res->start; ++ pcie->out_wins[pcie->num_out_wins].pcie_addr ++ = (dma_addr_t)(res->start ++ - (phys_addr_t)offset); ++ pcie->out_wins[pcie->num_out_wins].size ++ = (dma_addr_t)(res->end - res->start + 1); ++ pcie->num_out_wins++; ++ parent = &iomem_resource; ++ } else { ++ continue; ++ } ++ ++ ret = devm_request_resource(pcie->dev, parent, res); ++ if (ret) { ++ dev_err(pcie->dev, "failed to get res %pR\n", res); ++ return ret; ++ } ++ } ++ return 0; ++} ++ ++static int brcm_pcie_setup(struct brcm_pcie *pcie) ++{ ++ void __iomem *base = pcie->base; ++ unsigned int scb_size_val; ++ u64 rc_bar2_offset, rc_bar2_size, total_mem_size = 0; ++ u32 tmp, burst; ++ int i, j, ret, limit; ++ u16 nlw, cls, lnksta; ++ bool ssc_good = false; ++ struct device *dev = pcie->dev; ++ ++ /* Reset the bridge */ ++ brcm_pcie_bridge_sw_init_set(pcie, 1); ++ ++ /* ++ * Ensure that the fundamental reset is asserted, except for 7278, ++ * which fails if we do this. ++ */ ++ if (pcie->type != BCM7278) ++ brcm_pcie_perst_set(pcie, 1); ++ ++ usleep_range(100, 200); ++ ++ /* Take the bridge out of reset */ ++ brcm_pcie_bridge_sw_init_set(pcie, 0); ++ ++ WR_FLD_RB(base, PCIE_MISC_HARD_PCIE_HARD_DEBUG, SERDES_IDDQ, 0); ++ /* Wait for SerDes to be stable */ ++ usleep_range(100, 200); ++ ++ /* Grab the PCIe hw revision number */ ++ tmp = bcm_readl(base + PCIE_MISC_REVISION); ++ pcie->rev = EXTRACT_FIELD(tmp, PCIE_MISC_REVISION, MAJMIN); ++ ++ /* Set SCB_MAX_BURST_SIZE, CFG_READ_UR_MODE, SCB_ACCESS_EN */ ++ tmp = INSERT_FIELD(0, PCIE_MISC_MISC_CTRL, SCB_ACCESS_EN, 1); ++ tmp = INSERT_FIELD(tmp, PCIE_MISC_MISC_CTRL, CFG_READ_UR_MODE, 1); ++ burst = (pcie->type == GENERIC || pcie->type == BCM7278) ++ ? BURST_SIZE_512 : BURST_SIZE_256; ++ tmp = INSERT_FIELD(tmp, PCIE_MISC_MISC_CTRL, MAX_BURST_SIZE, burst); ++ bcm_writel(tmp, base + PCIE_MISC_MISC_CTRL); ++ ++ /* ++ * Set up inbound memory view for the EP (called RC_BAR2, ++ * not to be confused with the BARs that are advertised by ++ * the EP). ++ */ ++ for (i = 0; i < num_memc; i++) ++ total_mem_size += scb_size[i]; ++ ++ /* ++ * The PCIe host controller by design must set the inbound ++ * viewport to be a contiguous arrangement of all of the ++ * system's memory. In addition, its size mut be a power of ++ * two. To further complicate matters, the viewport must ++ * start on a pcie-address that is aligned on a multiple of its ++ * size. If a portion of the viewport does not represent ++ * system memory -- e.g. 3GB of memory requires a 4GB viewport ++ * -- we can map the outbound memory in or after 3GB and even ++ * though the viewport will overlap the outbound memory the ++ * controller will know to send outbound memory downstream and ++ * everything else upstream. ++ */ ++ rc_bar2_size = roundup_pow_of_two_64(total_mem_size); ++ ++ /* ++ * Set simple configuration based on memory sizes ++ * only. We always start the viewport at address 0. ++ */ ++ rc_bar2_offset = 0; ++ ++ tmp = lower_32_bits(rc_bar2_offset); ++ tmp = INSERT_FIELD(tmp, PCIE_MISC_RC_BAR2_CONFIG_LO, SIZE, ++ encode_ibar_size(rc_bar2_size)); ++ bcm_writel(tmp, base + PCIE_MISC_RC_BAR2_CONFIG_LO); ++ bcm_writel(upper_32_bits(rc_bar2_offset), ++ base + PCIE_MISC_RC_BAR2_CONFIG_HI); ++ ++ scb_size_val = scb_size[0] ++ ? ilog2(scb_size[0]) - 15 : 0xf; /* 0xf is 1GB */ ++ WR_FLD(base, PCIE_MISC_MISC_CTRL, SCB0_SIZE, scb_size_val); ++ ++ if (num_memc > 1) { ++ scb_size_val = scb_size[1] ++ ? ilog2(scb_size[1]) - 15 : 0xf; /* 0xf is 1GB */ ++ WR_FLD(base, PCIE_MISC_MISC_CTRL, SCB1_SIZE, scb_size_val); ++ } ++ ++ if (num_memc > 2) { ++ scb_size_val = scb_size[2] ++ ? ilog2(scb_size[2]) - 15 : 0xf; /* 0xf is 1GB */ ++ WR_FLD(base, PCIE_MISC_MISC_CTRL, SCB2_SIZE, scb_size_val); ++ } ++ ++ /* disable the PCIe->GISB memory window (RC_BAR1) */ ++ WR_FLD(base, PCIE_MISC_RC_BAR1_CONFIG_LO, SIZE, 0); ++ ++ /* disable the PCIe->SCB memory window (RC_BAR3) */ ++ WR_FLD(base, PCIE_MISC_RC_BAR3_CONFIG_LO, SIZE, 0); ++ ++ if (!pcie->suspended) { ++ /* clear any interrupts we find on boot */ ++ bcm_writel(0xffffffff, base + PCIE_INTR2_CPU_BASE + CLR); ++ (void)bcm_readl(base + PCIE_INTR2_CPU_BASE + CLR); ++ } ++ ++ /* Mask all interrupts since we are not handling any yet */ ++ bcm_writel(0xffffffff, base + PCIE_INTR2_CPU_BASE + MASK_SET); ++ (void)bcm_readl(base + PCIE_INTR2_CPU_BASE + MASK_SET); ++ ++ if (pcie->gen) ++ set_gen(base, pcie->gen); ++ ++ /* Unassert the fundamental reset */ ++ brcm_pcie_perst_set(pcie, 0); ++ ++ /* ++ * Give the RC/EP time to wake up, before trying to configure RC. ++ * Intermittently check status for link-up, up to a total of 100ms ++ * when we don't know if the device is there, and up to 1000ms if ++ * we do know the device is there. ++ */ ++ limit = pcie->suspended ? 1000 : 100; ++ for (i = 1, j = 0; j < limit && !brcm_pcie_link_up(pcie); ++ j += i, i = i * 2) ++ msleep(i + j > limit ? limit - j : i); ++ ++ if (!brcm_pcie_link_up(pcie)) { ++ dev_info(dev, "link down\n"); ++ return -ENODEV; ++ } ++ ++ if (!brcm_pcie_rc_mode(pcie)) { ++ dev_err(dev, "PCIe misconfigured; is in EP mode\n"); ++ return -EINVAL; ++ } ++ ++ for (i = 0; i < pcie->num_out_wins; i++) ++ brcm_pcie_set_outbound_win(pcie, i, pcie->out_wins[i].cpu_addr, ++ pcie->out_wins[i].pcie_addr, ++ pcie->out_wins[i].size); ++ ++ /* ++ * For config space accesses on the RC, show the right class for ++ * a PCIe-PCIe bridge (the default setting is to be EP mode). ++ */ ++ WR_FLD_RB(base, PCIE_RC_CFG_PRIV1_ID_VAL3, CLASS_CODE, 0x060400); ++ ++ if (pcie->ssc) { ++ ret = set_ssc(base); ++ if (ret == 0) ++ ssc_good = true; ++ else ++ dev_err(dev, "failed attempt to enter ssc mode\n"); ++ } ++ ++ lnksta = bcm_readw(base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKSTA); ++ cls = lnksta & PCI_EXP_LNKSTA_CLS; ++ nlw = (lnksta & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT; ++ dev_info(dev, "link up, %s Gbps x%u %s\n", link_speed_to_str(cls), ++ nlw, ssc_good ? "(SSC)" : "(!SSC)"); ++ ++ /* PCIe->SCB endian mode for BAR */ ++ /* field ENDIAN_MODE_BAR2 = DATA_ENDIAN */ ++ WR_FLD_RB(base, PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1, ++ ENDIAN_MODE_BAR2, DATA_ENDIAN); ++ ++ /* ++ * Refclk from RC should be gated with CLKREQ# input when ASPM L0s,L1 ++ * is enabled => setting the CLKREQ_DEBUG_ENABLE field to 1. ++ */ ++ WR_FLD_RB(base, PCIE_MISC_HARD_PCIE_HARD_DEBUG, CLKREQ_DEBUG_ENABLE, 1); ++ ++ return 0; ++} ++ ++/* L23 is a low-power PCIe link state */ ++static void enter_l23(struct brcm_pcie *pcie) ++{ ++ void __iomem *base = pcie->base; ++ int tries, l23; ++ ++ /* assert request for L23 */ ++ WR_FLD_RB(base, PCIE_MISC_PCIE_CTRL, PCIE_L23_REQUEST, 1); ++ /* poll L23 status */ ++ for (tries = 0, l23 = 0; tries < 1000 && !l23; tries++) ++ l23 = RD_FLD(base, PCIE_MISC_PCIE_STATUS, PCIE_LINK_IN_L23); ++ if (!l23) ++ dev_err(pcie->dev, "failed to enter L23\n"); ++} ++ ++static void turn_off(struct brcm_pcie *pcie) ++{ ++ void __iomem *base = pcie->base; ++ ++ if (brcm_pcie_link_up(pcie)) ++ enter_l23(pcie); ++ /* Assert fundamental reset */ ++ brcm_pcie_perst_set(pcie, 1); ++ /* Deassert request for L23 in case it was asserted */ ++ WR_FLD_RB(base, PCIE_MISC_PCIE_CTRL, PCIE_L23_REQUEST, 0); ++ /* Turn off SerDes */ ++ WR_FLD_RB(base, PCIE_MISC_HARD_PCIE_HARD_DEBUG, SERDES_IDDQ, 1); ++ /* Shutdown PCIe bridge */ ++ brcm_pcie_bridge_sw_init_set(pcie, 1); ++} ++ ++static int brcm_pcie_suspend(struct device *dev) ++{ ++ struct brcm_pcie *pcie = dev_get_drvdata(dev); ++ ++ turn_off(pcie); ++ clk_disable_unprepare(pcie->clk); ++ pcie->suspended = true; ++ ++ return 0; ++} ++ ++static int brcm_pcie_resume(struct device *dev) ++{ ++ struct brcm_pcie *pcie = dev_get_drvdata(dev); ++ void __iomem *base; ++ int ret; ++ ++ base = pcie->base; ++ clk_prepare_enable(pcie->clk); ++ ++ /* Take bridge out of reset so we can access the SerDes reg */ ++ brcm_pcie_bridge_sw_init_set(pcie, 0); ++ ++ /* Turn on SerDes */ ++ WR_FLD_RB(base, PCIE_MISC_HARD_PCIE_HARD_DEBUG, SERDES_IDDQ, 0); ++ /* Wait for SerDes to be stable */ ++ usleep_range(100, 200); ++ ++ ret = brcm_pcie_setup(pcie); ++ if (ret) ++ return ret; ++ ++ pcie->suspended = false; ++ ++ return 0; ++} ++ ++static void _brcm_pcie_remove(struct brcm_pcie *pcie) ++{ ++ turn_off(pcie); ++ clk_disable_unprepare(pcie->clk); ++ clk_put(pcie->clk); ++ brcm_pcie_remove_controller(pcie); ++} ++ ++static int brcm_pcie_remove(struct platform_device *pdev) ++{ ++ struct brcm_pcie *pcie = platform_get_drvdata(pdev); ++ ++ pci_stop_root_bus(pcie->root_bus); ++ pci_remove_root_bus(pcie->root_bus); ++ _brcm_pcie_remove(pcie); ++ ++ return 0; ++} ++ ++static const struct of_device_id brcm_pcie_match[] = { ++ { .compatible = "brcm,bcm7425-pcie", .data = &bcm7425_cfg }, ++ { .compatible = "brcm,bcm7435-pcie", .data = &bcm7435_cfg }, ++ { .compatible = "brcm,bcm7278-pcie", .data = &bcm7278_cfg }, ++ { .compatible = "brcm,bcm7445-pcie", .data = &generic_cfg }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, brcm_pcie_match); ++ ++static int brcm_pcie_probe(struct platform_device *pdev) ++{ ++ struct device_node *dn = pdev->dev.of_node; ++ const struct of_device_id *of_id; ++ const struct pcie_cfg_data *data; ++ int ret; ++ struct brcm_pcie *pcie; ++ struct resource *res; ++ void __iomem *base; ++ u32 tmp; ++ struct pci_host_bridge *bridge; ++ struct pci_bus *child; ++ ++ bridge = devm_pci_alloc_host_bridge(&pdev->dev, sizeof(*pcie)); ++ if (!bridge) ++ return -ENOMEM; ++ ++ pcie = pci_host_bridge_priv(bridge); ++ INIT_LIST_HEAD(&pcie->resources); ++ ++ of_id = of_match_node(brcm_pcie_match, dn); ++ if (!of_id) { ++ dev_err(&pdev->dev, "failed to look up compatible string\n"); ++ return -EINVAL; ++ } ++ ++ if (of_property_read_u32(dn, "dma-ranges", &tmp) == 0) { ++ dev_err(&pdev->dev, "cannot yet handle dma-ranges\n"); ++ return -EINVAL; ++ } ++ ++ data = of_id->data; ++ pcie->reg_offsets = data->offsets; ++ pcie->reg_field_info = data->reg_field_info; ++ pcie->type = data->type; ++ pcie->dn = dn; ++ pcie->dev = &pdev->dev; ++ ++ /* We use the domain number as our controller number */ ++ pcie->id = of_get_pci_domain_nr(dn); ++ if (pcie->id < 0) ++ return pcie->id; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ if (!res) ++ return -EINVAL; ++ ++ base = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(base)) ++ return PTR_ERR(base); ++ ++ pcie->clk = of_clk_get_by_name(dn, "sw_pcie"); ++ if (IS_ERR(pcie->clk)) { ++ dev_err(&pdev->dev, "could not get clock\n"); ++ pcie->clk = NULL; ++ } ++ pcie->base = base; ++ ++ ret = of_pci_get_max_link_speed(dn); ++ pcie->gen = (ret < 0) ? 0 : ret; ++ ++ pcie->ssc = of_property_read_bool(dn, "brcm,enable-ssc"); ++ ++ ret = irq_of_parse_and_map(pdev->dev.of_node, 0); ++ if (ret == 0) ++ /* keep going, as we don't use this intr yet */ ++ dev_warn(pcie->dev, "cannot get PCIe interrupt\n"); ++ else ++ pcie->irq = ret; ++ ++ ret = brcm_pcie_parse_request_of_pci_ranges(pcie); ++ if (ret) ++ return ret; ++ ++ ret = clk_prepare_enable(pcie->clk); ++ if (ret) { ++ dev_err(&pdev->dev, "could not enable clock\n"); ++ return ret; ++ } ++ ++ ret = brcm_pcie_add_controller(pcie); ++ if (ret) ++ return ret; ++ ++ ret = brcm_pcie_setup(pcie); ++ if (ret) ++ goto fail; ++ ++ list_splice_init(&pcie->resources, &bridge->windows); ++ bridge->dev.parent = &pdev->dev; ++ bridge->busnr = 0; ++ bridge->ops = &brcm_pcie_ops; ++ bridge->sysdata = pcie; ++ bridge->map_irq = of_irq_parse_and_map_pci; ++ bridge->swizzle_irq = pci_common_swizzle; ++ ++ ret = pci_scan_root_bus_bridge(bridge); ++ if (ret < 0) { ++ dev_err(pcie->dev, "Scanning root bridge failed\n"); ++ goto fail; ++ } ++ ++ pci_assign_unassigned_bus_resources(bridge->bus); ++ list_for_each_entry(child, &bridge->bus->children, node) ++ pcie_bus_configure_settings(child); ++ pci_bus_add_devices(bridge->bus); ++ platform_set_drvdata(pdev, pcie); ++ pcie->root_bus = bridge->bus; ++ ++ return 0; ++ ++fail: ++ _brcm_pcie_remove(pcie); ++ return ret; ++} ++ ++static const struct dev_pm_ops brcm_pcie_pm_ops = { ++ .suspend_noirq = brcm_pcie_suspend, ++ .resume_noirq = brcm_pcie_resume, ++}; ++ ++static struct platform_driver brcm_pcie_driver = { ++ .probe = brcm_pcie_probe, ++ .remove = brcm_pcie_remove, ++ .driver = { ++ .name = "brcm-pcie", ++ .owner = THIS_MODULE, ++ .of_match_table = brcm_pcie_match, ++ .pm = &brcm_pcie_pm_ops, ++ }, ++}; ++ ++module_platform_driver(brcm_pcie_driver); ++ ++MODULE_LICENSE("GPL v2"); ++MODULE_DESCRIPTION("Broadcom STB PCIe RC driver"); ++MODULE_AUTHOR("Broadcom"); +--- /dev/null ++++ b/include/soc/brcmstb/memory_api.h +@@ -0,0 +1,25 @@ ++#ifndef __MEMORY_API_H ++#define __MEMORY_API_H ++ ++/* ++ * Bus Interface Unit control register setup, must happen early during boot, ++ * before SMP is brought up, called by machine entry point. ++ */ ++void brcmstb_biuctrl_init(void); ++ ++#ifdef CONFIG_SOC_BRCMSTB ++int brcmstb_memory_phys_addr_to_memc(phys_addr_t pa); ++u64 brcmstb_memory_memc_size(int memc); ++#else ++static inline int brcmstb_memory_phys_addr_to_memc(phys_addr_t pa) ++{ ++ return -EINVAL; ++} ++ ++static inline u64 brcmstb_memory_memc_size(int memc) ++{ ++ return -1; ++} ++#endif ++ ++#endif /* __MEMORY_API_H */ |