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openwrt/target/linux/bcm27xx/patches-5.4/950-0205-PCI-brcmstb-Add-Broadcom-STB-PCIe-host-controller-dr.patch
Álvaro Fernández Rojas a1383655cf bcm27xx: add linux 5.4 support 
Tested on bcm2710 (Raspberry Pi 3B).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-02-29 12:50:51 +01:00

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From 79624ca23c53064fefee774a89952a587b72cc01 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 19 Feb 2019 22:06:59 +0000
Subject: [PATCH] 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
@@ -288,5 +288,14 @@ config PCI_HYPERV_INTERFACE
The Hyper-V PCI Interface is a helper driver allows other drivers to
have a common interface with the Hyper-V PCI frontend driver.
+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
@@ -29,11 +29,11 @@ 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 */
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