From: Jim Quinlan <jim2101024@xxxxxxxxx>
This patch adds support for Broadcom's STB SoC PCIE root complex
controller. This controller can be found in MIPS-based chips such as
BCM7425, 7429 and 7435 and ARM-based SoCs such as BCM7445.
This driver enables support for MSI, and S2/S3 suspend/resume modes.
Signed-off-by: Jim Quinlan <jim2101024@xxxxxxxxx>
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
Changes in v2:
- separate MSI logic into a different file
- simplify the code to utilize less bookeeping variables
- replaced fixed delays with sleeps instead
- introduce helper functions to deal with read/write config and reset
- get rid of the custom window variables, walk the resource list instead
- utilize OF aliases to determine PCIe root complex id
MAINTAINERS | 1 +
drivers/pci/host/Kconfig | 17 +
drivers/pci/host/Makefile | 2 +
drivers/pci/host/pcie-brcmstb-msi.c | 305 ++++++++++++++
drivers/pci/host/pcie-brcmstb.c | 769 ++++++++++++++++++++++++++++++++++++
drivers/pci/host/pcie-brcmstb.h | 160 ++++++++
6 files changed, 1254 insertions(+)
create mode 100644 drivers/pci/host/pcie-brcmstb-msi.c
create mode 100644 drivers/pci/host/pcie-brcmstb.c
create mode 100644 drivers/pci/host/pcie-brcmstb.h
diff --git a/MAINTAINERS b/MAINTAINERS
index ecbb2f6a3ba0..503a2a4fa4ad 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2458,6 +2458,7 @@ S: Maintained
F: arch/arm/mach-bcm/*brcmstb*
F: arch/arm/boot/dts/bcm7*.dts*
F: drivers/bus/brcmstb_gisb.c
+F: drivers/pci/host/pcie-brcmstb*.[ch]
N: brcmstb
BROADCOM BMIPS MIPS ARCHITECTURE
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index 7a0780d56d2d..0964aa0d36e4 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -143,6 +143,23 @@ config PCI_VERSATILE
bool "ARM Versatile PB PCI controller"
depends on ARCH_VERSATILE
+config PCIE_BRCMSTB
+ tristate "Broadcom STB PCIe controller"
+ depends on OF && (ARCH_BRCMSTB || BMIPS_GENERIC)
+ default ARCH_BRCMSTB || BMIPS_GENERIC
+ help
+ Say Y here if you want to use the Broadcom STB PCIe controller. This
+ controller supports Broadcom's STB SoCs such a 7425, 7429, 7435 and
+ 7445 and compatible chips.
+
+config PCIE_BRCMSTB_MSI
+ bool "Broadcom STB PCIe MSI feature"
+ depends on PCIE_BRCMSTB && PCI_MSI
+ select PCI_MSI_IRQ_DOMAIN
+ default PCIE_BRCMSTB
+ help
+ Say Y here if you want PCIe MSI support for the Broadcom STB PCIe RC.
+
config PCIE_IPROC
tristate
help
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index d85b5faf9bbc..f51ef13454b4 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -18,6 +18,8 @@ obj-$(CONFIG_PCI_XGENE) += pci-xgene.o
obj-$(CONFIG_PCI_XGENE_MSI) += pci-xgene-msi.o
obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o
obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
+obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
+obj-$(CONFIG_PCIE_BRCMSTB_MSI) += pcie-brcmstb-msi.o
obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
obj-$(CONFIG_PCIE_IPROC_MSI) += pcie-iproc-msi.o
obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
diff --git a/drivers/pci/host/pcie-brcmstb-msi.c b/drivers/pci/host/pcie-brcmstb-msi.c
new file mode 100644
index 000000000000..5aa78a10833c
--- /dev/null
+++ b/drivers/pci/host/pcie-brcmstb-msi.c
@@ -0,0 +1,305 @@
+/*
+ * Broadcom STB PCIe root complex MSI driver
+ *
+ * Copyright (C) 2009 - 2016 Broadcom
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/msi.h>
+#include <linux/printk.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/module.h>
+#include <linux/irqdomain.h>
+#include <linux/string.h>
+#include <linux/sizes.h>
+
+#include "pcie-brcmstb.h"
+
+#define BRCM_INT_PCI_MSI_NR 32
+#define BRCM_PCIE_HW_REV_33 0x0303
+#define BRCM_MSI_TARGET_ADDR_LO 0x0
+#define BRCM_MSI_TARGET_ADDR_HI 0xffffffff
+
+struct brcm_msi {
+ struct irq_domain *domain;
+ struct irq_chip irq_chip;
+ struct msi_controller chip;
+ struct brcm_pcie *pcie;
+ struct mutex lock;
+ int irq;
+ /* intr_base is the base pointer for interrupt status/set/clr regs */
+ void __iomem *intr_base;
+ /* intr_legacy_mask indicates how many bits are MSI interrupts */
+ u32 intr_legacy_mask;
+ /* intr_legacy_offset indicates bit position of MSI_01 */
+ u32 intr_legacy_offset;
+ /* used indicates which MSI interrupts have been alloc'd */
+ unsigned long used;
+ /* working indicates that on boot we have brought up MSI */
+ bool working;
+};
+
+static inline struct brcm_msi *to_brcm_msi(struct msi_controller *chip)
+{
+ return container_of(chip, struct brcm_msi, chip);
+}
+
+static int brcm_msi_alloc(struct brcm_msi *chip)
+{
+ int msi;
+
+ mutex_lock(&chip->lock);
+ msi = ~chip->used ? ffz(chip->used) : -1;
+
+ if (msi >= 0 && msi < BRCM_INT_PCI_MSI_NR)
+ chip->used |= (1 << msi);
+ else
+ msi = -ENOSPC;
+
+ mutex_unlock(&chip->lock);
+ return msi;
+}
+
+static void brcm_msi_free(struct brcm_msi *chip, unsigned long irq)
+{
+ mutex_lock(&chip->lock);
+ chip->used &= ~(1 << irq);
+ mutex_unlock(&chip->lock);
+}
+
+static irqreturn_t brcm_pcie_msi_irq(int irq, void *data)
+{
+ struct brcm_pcie *pcie = data;
+ struct brcm_msi *msi = pcie->msi;
+ unsigned long status;
+
+ status = bpcie_readl(msi->intr_base + STATUS) & msi->intr_legacy_mask;
+
+ if (!status)
+ return IRQ_NONE;
+
+ while (status) {
+ unsigned int index = ffs(status) - 1;
+ unsigned int irq;
+
+ /* clear the interrupt */
+ bpcie_writel(1 << index, msi->intr_base + CLR);
+ status &= ~(1 << index);
+
+ /* Account for legacy interrupt offset */
+ index -= msi->intr_legacy_offset;
+
+ irq = irq_find_mapping(msi->domain, index);
+ if (irq) {
+ if (msi->used & (1 << index))
+ generic_handle_irq(irq);
+ else
+ dev_info(pcie->dev, "unhandled MSI %d\n",
+ index);
+ } else {
+ /* Unknown MSI, just clear it */
+ dev_dbg(pcie->dev, "unexpected MSI\n");
+ }
+ }
+ return IRQ_HANDLED;
+}
+
+static int brcm_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
+ struct msi_desc *desc)
+{
+ struct brcm_msi *msi = to_brcm_msi(chip);
+ struct brcm_pcie *pcie = msi->pcie;
+ struct msi_msg msg;
+ unsigned int irq;
+ int hwirq;
+ u32 data;
+
+ hwirq = brcm_msi_alloc(msi);
+ if (hwirq < 0)
+ return hwirq;
+
+ irq = irq_create_mapping(msi->domain, hwirq);
+ if (!irq) {
+ brcm_msi_free(msi, hwirq);
+ return -EINVAL;
+ }
+
+ irq_set_msi_desc(irq, desc);
+
+ msg.address_lo = BRCM_MSI_TARGET_ADDR_LO;
+ msg.address_hi = BRCM_MSI_TARGET_ADDR_HI;
+ data = bpcie_readl(pcie->base + PCIE_MISC_MSI_DATA_CONFIG);
+ msg.data = ((data >> 16) & (data & 0xffff)) | hwirq;
+ wmb(); /* just being cautious */
+ write_msi_msg(irq, &msg);
+
+ return 0;
+}
+
+static void brcm_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
+{
+ struct brcm_msi *msi = to_brcm_msi(chip);
+ struct irq_data *d = irq_get_irq_data(irq);
+
+ brcm_msi_free(msi, d->hwirq);
+}
+
+static int brcm_msi_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ struct brcm_pcie *pcie = domain->host_data;
+
+ irq_set_chip_and_handler(irq, &pcie->msi->irq_chip, handle_simple_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+ .map = brcm_msi_map,
+};
+
+int brcm_pcie_enable_msi(struct brcm_pcie *pcie, int nr)
+{
+ static const char brcm_msi_name[] = "brcmstb_pcieX_msi";
+ struct brcm_msi *msi;
+ u32 data_val;
+ char *name;
+ int err;
+
+ pcie->msi = devm_kzalloc(pcie->dev, sizeof(*msi), GFP_KERNEL);
+ if (!pcie->msi)
+ return -ENODEV;
+
+ msi = pcie->msi;
+ msi->pcie = pcie;
+
+ if (!pcie->suspended) {
+ /* We are only here on cold boot */
+ mutex_init(&msi->lock);
+
+ msi->chip.dev = pcie->dev;
+ msi->chip.setup_irq = brcm_msi_setup_irq;
+ msi->chip.teardown_irq = brcm_msi_teardown_irq;
+
+ /* We have multiple RC controllers. We may have as many
+ * MSI controllers for them. We want each to have a
+ * unique name, so we go to the trouble of having an
+ * irq_chip per RC (instead of one for all of them).
+ */
+ name = devm_kzalloc(pcie->dev, sizeof(brcm_msi_name),
+ GFP_KERNEL);
+ if (name) {
+ char *p;
+
+ strcpy(name, brcm_msi_name);
+ p = strchr(name, 'X');
+ if (p)
+ *p = '0' + nr;
+ msi->irq_chip.name = name;
+ } else {
+ msi->irq_chip.name = brcm_msi_name;
+ }
+
+ msi->irq_chip.irq_enable = unmask_msi_irq;
+ msi->irq_chip.irq_disable = mask_msi_irq;
+ msi->irq_chip.irq_mask = mask_msi_irq;
+ msi->irq_chip.irq_unmask = unmask_msi_irq;
+
+ msi->domain =
+ irq_domain_add_linear(pcie->dn, BRCM_INT_PCI_MSI_NR,
+ &msi_domain_ops, pcie);
+ if (!msi->domain) {
+ dev_err(pcie->dev,
+ "failed to create IRQ domain for MSI\n");
+ return -ENOMEM;
+ }
+
+ err = devm_request_irq(pcie->dev, msi->irq, brcm_pcie_msi_irq,
+ IRQF_SHARED, msi->irq_chip.name,
+ pcie);
+ if (err < 0) {
+ dev_err(pcie->dev,
+ "failed to request IRQ (%d) for MSI\n", err);
+ goto msi_en_err;
+ }
+
+ if (pcie->rev >= BRCM_PCIE_HW_REV_33) {
+ msi->intr_base = pcie->base + PCIE_MSI_INTR2_BASE;
+ /* This version of PCIe hw has only 32 intr bits
+ * starting at bit position 0.
+ */
+ msi->intr_legacy_mask = 0xffffffff;
+ msi->intr_legacy_offset = 0x0;
+ msi->used = 0x0;
+
+ } else {
+ msi->intr_base = pcie->base + PCIE_INTR2_CPU_BASE;
+ /* This version of PCIe hw has only 8 intr bits starting
+ * at bit position 24.
+ */
+ msi->intr_legacy_mask = 0xff000000;
+ msi->intr_legacy_offset = 24;
+ msi->used = 0xffffff00;
+ }
+ msi->working = true;
+ }
+
+ /* If we are here, and msi->working is false, it means that we've
+ * already tried and failed to bring up MSI. Just return 0
+ * since there is nothing to be done.
+ */
+ if (!msi->working)
+ return 0;
+
+ if (pcie->rev >= BRCM_PCIE_HW_REV_33) {
+ /* ffe0 -- least sig 5 bits are 0 indicating 32 msgs
+ * 6540 -- this is our arbitrary unique data value
+ */
+ data_val = 0xffe06540;
+ } else {
+ /* fff8 -- least sig 3 bits are 0 indicating 8 msgs
+ * 6540 -- this is our arbitrary unique data value
+ */
+ data_val = 0xfff86540;
+ }
+
+ /* Make sure we are not masking MSIs. Note that MSIs can be masked,
+ * but that occurs on the PCIe EP device
+ */
+ bpcie_writel(0xffffffff & msi->intr_legacy_mask,
+ msi->intr_base + MASK_CLR);
+
+ /* The 0 bit of BRCM_MSI_TARGET_ADDR_LO is repurposed to MSI enable,
+ * which we set to 1.
+ */
+ bpcie_writel(BRCM_MSI_TARGET_ADDR_LO | 1, pcie->base
+ + PCIE_MISC_MSI_BAR_CONFIG_LO);
+ bpcie_writel(BRCM_MSI_TARGET_ADDR_HI, pcie->base
+ + PCIE_MISC_MSI_BAR_CONFIG_HI);
+ bpcie_writel(data_val, pcie->base + PCIE_MISC_MSI_DATA_CONFIG);
+
+ return 0;
+
+msi_en_err:
+ irq_domain_remove(msi->domain);
+ return err;
+}
+
+void brcm_pcie_msi_chip_set(struct brcm_pcie *pcie)
+{
+ pcie->bus->msi = &pcie->msi->chip;
+}
diff --git a/drivers/pci/host/pcie-brcmstb.c b/drivers/pci/host/pcie-brcmstb.c
new file mode 100644
index 000000000000..57011e8e772a
--- /dev/null
+++ b/drivers/pci/host/pcie-brcmstb.c
@@ -0,0 +1,769 @@
+/*
+ * Broadcom STB PCIe root complex driver
+ *
+ * Copyright (C) 2009 - 2016 Broadcom
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/compiler.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/msi.h>
+#include <linux/printk.h>
+#include <linux/of_irq.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/sizes.h>
+
+#include "pcie-brcmstb.h"
+
+static void wr_fld(void __iomem *p, u32 mask, int shift, u32 val)
+{
+ u32 reg;
+
+ reg = bpcie_readl(p);
+ reg = (reg & ~mask) | (val << shift);
+ bpcie_writel(reg, p);
+}
+
+static void wr_fld_rb(void __iomem *p, u32 mask, int shift, u32 val)
+{
+ wr_fld(p, mask, shift, val);
+ (void) bpcie_readl(p);
+}
+
+/* Helper macro to define low-level operations for read/write/reset */
+#define PCIE_LL_OPS(name, def) \
+static void name##_pcie_rgr1_sw_init(struct brcm_pcie *pcie, u32 mask, \
+ int shift, u32 val) \
+{ \
+ wr_fld_rb(pcie->base + def##PCIE_RGR1_SW_INIT_1, mask, shift, val); \
+} \
+static u32 name##_pcie_read_config(struct brcm_pcie *pcie, int cfg_idx) \
+{ \
+ bpcie_writel(cfg_idx, pcie->base + def##PCIE_EXT_CFG_INDEX); \
+ bpcie_readl(pcie->base + def##PCIE_EXT_CFG_INDEX); \
+ return bpcie_readl(pcie->base + def##PCIE_EXT_CFG_DATA); \
+} \
+static void name##_pcie_write_config(struct brcm_pcie *pcie, \
+ int cfg_idx, u32 val) \
+{ \
+ bpcie_writel(cfg_idx, pcie->base + def##PCIE_EXT_CFG_INDEX); \
+ bpcie_readl(pcie->base + def##PCIE_EXT_CFG_INDEX); \
+ bpcie_writel(val, pcie->base + def##PCIE_EXT_CFG_DATA); \
+ bpcie_readl(pcie->base + def##PCIE_EXT_CFG_DATA); \
+}
+
+PCIE_LL_OPS(bcm7425, BCM7425_);
+/* Optional second argument */
+PCIE_LL_OPS(gen,);
+
+static const struct brcm_pcie_cfg_data bcm7425_cfg = {
+ .type = BCM7425,
+ .ops = {
+ .read_config = bcm7425_pcie_read_config,
+ .write_config = bcm7425_pcie_write_config,
+ .rgr1_sw_init = bcm7425_pcie_rgr1_sw_init,
+ },
+};
+
+static const struct brcm_pcie_cfg_data bcm7435_cfg = {
+ .type = BCM7435,
+ .ops = {
+ .read_config = gen_pcie_read_config,
+ .write_config = gen_pcie_write_config,
+ .rgr1_sw_init = gen_pcie_rgr1_sw_init,
+ },
+};
+
+static const struct brcm_pcie_cfg_data generic_cfg = {
+ .type = GENERIC,
+ .ops = {
+ .read_config = gen_pcie_read_config,
+ .write_config = gen_pcie_write_config,
+ .rgr1_sw_init = gen_pcie_rgr1_sw_init,
+ },
+};
+
+#if defined(__BIG_ENDIAN)
+#define DATA_ENDIAN 2 /* PCI->DDR inbound accesses */
+#define MMIO_ENDIAN 2 /* CPU->PCI outbound accesses */
+#else
+#define DATA_ENDIAN 0
+#define MMIO_ENDIAN 0
+#endif
+
+/* negative return value indicates error */
+static int mdio_read(void __iomem *base, u8 phyad, u8 regad)
+{
+ u32 data = ((phyad & 0xf) << 16)
+ | (regad & 0x1f)
+ | 0x100000;
+
+ bpcie_writel(data, base + PCIE_RC_DL_MDIO_ADDR);
+ bpcie_readl(base + PCIE_RC_DL_MDIO_ADDR);
+
+ data = bpcie_readl(base + PCIE_RC_DL_MDIO_RD_DATA);
+ if (!(data & 0x80000000)) {
+ msleep(1);
+ data = bpcie_readl(base + PCIE_RC_DL_MDIO_RD_DATA);
+ }
+
+ return (data & 0x80000000) ? (data & 0xffff) : -EIO;
+}
+
+/* negative return value indicates error */
+static int mdio_write(void __iomem *base, u8 phyad, u8 regad, u16 wrdata)
+{
+ u32 data = ((phyad & 0xf) << 16) | (regad & 0x1f);
+
+ bpcie_writel(data, base + PCIE_RC_DL_MDIO_ADDR);
+ bpcie_readl(base + PCIE_RC_DL_MDIO_ADDR);
+
+ bpcie_writel(0x80000000 | wrdata, base + PCIE_RC_DL_MDIO_WR_DATA);
+ data = bpcie_readl(base + PCIE_RC_DL_MDIO_WR_DATA);
+ if (!(data & 0x80000000)) {
+ msleep(1);
+ data = bpcie_readl(base + PCIE_RC_DL_MDIO_WR_DATA);
+ }
+
+ return (data & 0x80000000) ? 0 : -EIO;
+}
+
+/* configures device for ssc mode; negative return value indicates error */
+static int set_ssc(void __iomem *base)
+{
+ int tmp;
+ u16 wrdata;
+
+ tmp = mdio_write(base, 0, 0x1f, 0x1100);
+ if (tmp < 0)
+ return tmp;
+
+ tmp = mdio_read(base, 0, 2);
+ if (tmp < 0)
+ return tmp;
+
+ wrdata = ((u16)tmp & 0x3fff) | 0xc000;
+ tmp = mdio_write(base, 0, 2, wrdata);
+ if (tmp < 0)
+ return tmp;
+
+ msleep(1);
+ tmp = mdio_read(base, 0, 1);
+ if (tmp < 0)
+ return tmp;
+
+ return 0;
+}
+
+
+/* returns 0 if in ssc mode, 1 if not, <0 on error */
+static int is_ssc(void __iomem *base)
+{
+ int tmp = mdio_write(base, 0, 0x1f, 0x1100);
+
+ if (tmp < 0)
+ return tmp;
+ tmp = mdio_read(base, 0, 1);
+ if (tmp < 0)
+ return tmp;
+ return (tmp & 0xc00) == 0xc00 ? 0 : 1;
+}
+
+/* limits operation to a specific generation (1, 2, or 3) */
+static void set_gen(void __iomem *base, int gen)
+{
+ wr_fld(base + PCIE_RC_CFG_PCIE_LINK_CAPABILITY, 0xf, 0, gen);
+ wr_fld(base + PCIE_RC_CFG_PCIE_LINK_STATUS_CONTROL_2, 0xf, 0, gen);
+}
+
+static void set_pcie_outbound_win(void __iomem *base, unsigned int win,
+ u64 start, u64 len)
+{
+ u32 tmp;
+
+ bpcie_writel((u32)(start) + MMIO_ENDIAN,
+ base + PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LO + (win * 8));
+ bpcie_writel((u32)(start >> 32),
+ base + PCIE_MISC_CPU_2_PCIE_MEM_WIN0_HI + (win * 8));
+ tmp = ((((u32)start) >> 20) << 4)
+ | (((((u32)start) + ((u32)len) - 1) >> 20) << 20);
+ bpcie_writel(tmp, base +
+ PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT + (win * 4));
+}
+
+static int is_pcie_link_up(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ u32 val = bpcie_readl(base + PCIE_MISC_PCIE_STATUS);
+
+ return ((val & 0x30) == 0x30) ? 1 : 0;
+}
+
+static int brcm_pcie_setup_early(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ struct resource_entry *win;
+ unsigned int scb_size_val;
+ struct resource *r;
+ int i, ret;
+
+ /* reset the bridge and the endpoint device
+ * field: PCIE_BRIDGE_SW_INIT = 1
+ */
+ brcm_pcie_rgr1_sw_init(pcie, 0x00000002, 1, 1);
+
+ /* field: PCIE_SW_PERST = 1 */
+ brcm_pcie_rgr1_sw_init(pcie, 0x00000001, 0, 1);
+
+ /* delay 100us */
+ usleep_range(100, 1000);
+
+ /* take the bridge out of reset
+ * field: PCIE_BRIDGE_SW_INIT = 0
+ */
+ brcm_pcie_rgr1_sw_init(pcie, 0x00000002, 1, 0);
+
+ /* Grab the PCIe hw revision number */
+ pcie->rev = bpcie_readl(base + PCIE_MISC_REVISION) & 0xffff;
+
+ /* enable SCB_MAX_BURST_SIZE | CSR_READ_UR_MODE | SCB_ACCESS_EN */
+ if (pcie->type == GENERIC)
+ bpcie_writel(0x81e03000, base + PCIE_MISC_MISC_CTRL);
+ else
+ bpcie_writel(0x00103000, base + PCIE_MISC_MISC_CTRL);
+
+ i = 0;
+ resource_list_for_each_entry(win, &pcie->resource) {
+ r = win->res;
+
+ if (!r->flags)
+ continue;
+
+ switch (resource_type(r)) {
+ case IORESOURCE_MEM:
+ /* Program PCIe outbound windows */
+ set_pcie_outbound_win(base, i, r->start,
+ resource_size(r));
+ i++;
+
+ /* Request memory region resources the first time */
+ if (!pcie->bridge_setup_done) {
+ ret = devm_request_resource(pcie->dev,
+ &iomem_resource,
+ r);
+ if (ret)
+ return ret;
+ }
+
+ if (i == BRCM_NUM_PCI_OUT_WINS)
+ dev_warn(pcie->dev,
+ "exceeded number of windows\n");
+ break;
+
+ default:
+ /* No support for IORESOURCE_IO or IORESOURCE_BUS */
+ continue;
+ }
+ }
+
+ /* set up 4GB PCIE->SCB memory window on BAR2 */
+ bpcie_writel(0x00000011, base + PCIE_MISC_RC_BAR2_CONFIG_LO);
+ bpcie_writel(0x00000000, base + PCIE_MISC_RC_BAR2_CONFIG_HI);
+
+ /* field: SCB0_SIZE, default = 0xf (1 GB) */
+ scb_size_val = pcie->scb_size_vals[0] ? pcie->scb_size_vals[0] : 0xf;
+ wr_fld(base + PCIE_MISC_MISC_CTRL, 0xf8000000, 27, scb_size_val);
+
+ /* field: SCB1_SIZE, default = 0xf (1 GB) */
+ if (pcie->num_memc > 1) {
+ scb_size_val = pcie->scb_size_vals[1]
+ ? pcie->scb_size_vals[1] : 0xf;
+ wr_fld(base + PCIE_MISC_MISC_CTRL, 0x07c00000,
+ 22, scb_size_val);
+ }
+
+ /* field: SCB2_SIZE, default = 0xf (1 GB) */
+ if (pcie->num_memc > 2) {
+ scb_size_val = pcie->scb_size_vals[2]
+ ? pcie->scb_size_vals[2] : 0xf;
+ wr_fld(base + PCIE_MISC_MISC_CTRL, 0x0000001f,
+ 0, scb_size_val);
+ }
+
+ /* disable the PCIE->GISB memory window */
+ bpcie_writel(0x00000000, base + PCIE_MISC_RC_BAR1_CONFIG_LO);
+
+ /* disable the PCIE->SCB memory window */
+ bpcie_writel(0x00000000, base + PCIE_MISC_RC_BAR3_CONFIG_LO);
+
+ if (!pcie->suspended) {
+ /* clear any interrupts we find on boot */
+ bpcie_writel(0xffffffff, base + PCIE_INTR2_CPU_BASE + CLR);
+ (void) bpcie_readl(base + PCIE_INTR2_CPU_BASE + CLR);
+ }
+
+ /* Mask all interrupts since we are not handling any yet */
+ bpcie_writel(0xffffffff, base + PCIE_INTR2_CPU_BASE + MASK_SET);
+ (void) bpcie_readl(base + PCIE_INTR2_CPU_BASE + MASK_SET);
+
+ if (pcie->ssc)
+ if (set_ssc(base))
+ dev_err(pcie->dev, "error while configuring ssc mode\n");
+ if (pcie->gen)
+ set_gen(base, pcie->gen);
+
+ /* take the EP device out of reset */
+ /* field: PCIE_SW_PERST = 0 */
+ brcm_pcie_rgr1_sw_init(pcie, 0x00000001, 0, 0);
+
+ return 0;
+}
+
+static void brcm_pcie_turn_off(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+
+ /* Reset endpoint device */
+ brcm_pcie_rgr1_sw_init(pcie, 0x00000001, 0, 1);
+
+ /* deassert request for L23 in case it was asserted */
+ wr_fld_rb(base + PCIE_MISC_PCIE_CTRL, 0x1, 0, 0);
+
+ /* SERDES_IDDQ = 1 */
+ wr_fld_rb(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG, 0x08000000,
+ 27, 1);
+ /* Shutdown PCIe bridge */
+ brcm_pcie_rgr1_sw_init(pcie, 0x00000002, 1, 1);
+}
+
+static void brcm_pcie_enter_l23(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ int timeout = 1000;
+ int l23;
+
+ /* assert request for L23 */
+ wr_fld_rb(base + PCIE_MISC_PCIE_CTRL, 0x1, 0, 1);
+ do {
+ /* poll L23 status */
+ l23 = bpcie_readl(base + PCIE_MISC_PCIE_STATUS) & (1 << 6);
+ } while (--timeout && !l23);
+
+ if (!timeout)
+ dev_err(pcie->dev, "failed to enter L23\n");
+}
+
+static int brcm_setup_pcie_bridge(struct brcm_pcie *pcie)
+{
+ static const char *link_speed[4] = { "???", "2.5", "5.0", "8.0" };
+ void __iomem *base = pcie->base;
+ const int limit = pcie->suspended ? 1000 : 100;
+ struct clk *clk;
+ unsigned int status;
+ int i, j, ret;
+ bool ssc_good = false;
+
+ /* 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.
+ */
+ for (i = 1, j = 0; j < limit && !is_pcie_link_up(pcie); j += i, i = i*2)
+ msleep(i + j > limit ? limit - j : i);
+
+ if (!is_pcie_link_up(pcie)) {
+ dev_info(pcie->dev, "link down\n");
+ goto fail;
+ }
+
+ /* Attempt to enable MSI if we have an interrupt for it. */
+ if (pcie->msi_irq > 0) {
+ ret = brcm_pcie_enable_msi(pcie, pcie->num);
+ if (ret < 0) {
+ dev_err(pcie->dev, "failed to enable MSI support: %d\n",
+ ret);
+ }
+ }
+
+ /* For config space accesses on the RC, show the right class for
+ * a PCI-PCI bridge
+ */
+ wr_fld_rb(base + PCIE_RC_CFG_PRIV1_ID_VAL3, 0x00ffffff, 0, 0x060400);
+
+ status = bpcie_readl(base + PCIE_RC_CFG_PCIE_LINK_STATUS_CONTROL);
+
+ if (pcie->ssc) {
+ if (is_ssc(base) == 0)
+ ssc_good = true;
+ else
+ dev_err(pcie->dev, "failed to enter SSC mode\n");
+ }
+
+ dev_info(pcie->dev, "link up, %s Gbps x%u %s\n",
+ link_speed[((status & 0x000f0000) >> 16) & 0x3],
+ (status & 0x03f00000) >> 20, ssc_good ? "(SSC)" : "(!SSC)");
+
+ /* Enable configuration request retry (see pci_scan_device()) */
+ /* field RC_CRS_EN = 1
+ */
+ wr_fld(base + PCIE_RC_CFG_PCIE_ROOT_CAP_CONTROL, 0x00000010, 4, 1);
+
+ /* PCIE->SCB endian mode for BAR ield ENDIAN_MODE_BAR2 = DATA_ENDIAN
+ */
+ wr_fld_rb(base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1, 0x0000000c, 2,
+ 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, 0x00000002, 1, 1);
+
+ /* Add bogus IO resource structure so that pcibios_init_resources()
+ * does not allocate the same IO region for different domains
+ */
+
+ pcie->bridge_setup_done = true;
+
+ return 0;
+fail:
+ if (IS_ENABLED(CONFIG_PM))
+ brcm_pcie_turn_off(pcie);
+
+ clk = pcie->clk;
+ if (pcie->suspended)
+ clk_disable(clk);
+ else {
+ clk_disable_unprepare(clk);
+ clk_put(clk);
+ }
+
+ pcie->bridge_setup_done = false;
+
+ return -ENODEV;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int brcm_pcie_suspend(struct device *dev)
+{
+ struct brcm_pcie *pcie = dev_get_drvdata(dev);
+
+ if (!pcie->bridge_setup_done)
+ return 0;
+
+ brcm_pcie_enter_l23(pcie);
+ brcm_pcie_turn_off(pcie);
+ clk_disable(pcie->clk);
+ pcie->suspended = true;
+
+ return 0;
+}
+
+static int brcm_pcie_resume(struct device *dev)
+{
+ struct brcm_pcie *pcie = dev_get_drvdata(dev);
+
+ if (!pcie->bridge_setup_done)
+ return 0;
+
+ /* Take bridge out of reset so we can access the SERDES reg */
+ brcm_pcie_rgr1_sw_init(pcie, 0x00000002, 1, 0);
+
+ /* SERDES_IDDQ = 0 */
+ wr_fld_rb(pcie->base + PCIE_MISC_HARD_PCIE_HARD_DEBUG, 0x08000000,
+ 27, 0);
+ /* wait for serdes to be stable */
+ usleep_range(100, 1000);
+
+ brcm_pcie_setup_early(pcie);
+
+ brcm_setup_pcie_bridge(pcie);
+ pcie->suspended = false;
+
+ return 0;
+}
+
+static const struct dev_pm_ops brcm_pcie_pm_ops = {
+ .suspend_noirq = brcm_pcie_suspend,
+ .resume_noirq = brcm_pcie_resume,
+};
+#else
+#define brcm_pcie_pm_ops NULL
+#endif /* CONFIG_PM_SLEEP */
+
+static int cfg_index(int busnr, int devfn, int reg)
+{
+ return ((PCI_SLOT(devfn) & 0x1f) << PCI_SLOT_SHIFT)
+ | ((PCI_FUNC(devfn) & 0x07) << PCI_FUNC_SHIFT)
+ | (busnr << PCI_BUSNUM_SHIFT)
+ | (reg & ~3);
+}
+
+static int brcm_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 data)
+{
+ struct brcm_pcie *pcie = bus->sysdata;
+ u32 val = 0, mask, shift;
+ void __iomem *base;
+ bool rc_access;
+ int idx;
+
+ if (!is_pcie_link_up(pcie))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ base = pcie->base;
+
+ rc_access = !!pci_is_root_bus(bus);
+
+ idx = cfg_index(bus->number, devfn, where);
+ WARN_ON(((where & 3) + size) > 4);
+
+ if (rc_access && PCI_SLOT(devfn))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (size < 4) {
+ /* partial word - read, modify, write */
+ if (rc_access)
+ val = bpcie_readl(base + (where & ~3));
+ else
+ val = brcm_pcie_ll_read_config(pcie, idx);
+ }
+
+ shift = (where & 3) << 3;
+ mask = (0xffffffff >> ((4 - size) << 3)) << shift;
+ val = (val & ~mask) | ((data << shift) & mask);
+
+ if (rc_access) {
+ bpcie_writel(val, base + (where & ~3));
+ bpcie_readl(base + (where & ~3));
+ } else {
+ brcm_pcie_ll_write_config(pcie, idx, val);
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int brcm_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *data)
+{
+ struct brcm_pcie *pcie = bus->sysdata;
+ u32 val, mask, shift;
+ void __iomem *base;
+ bool rc_access;
+ int idx;
+
+ if (!is_pcie_link_up(pcie))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ base = pcie->base;
+
+ rc_access = !!pci_is_root_bus(bus);
+ idx = cfg_index(bus->number, devfn, where);
+ WARN_ON(((where & 3) + size) > 4);
+
+ if (rc_access && PCI_SLOT(devfn)) {
+ *data = 0xffffffff;
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ }
+
+ if (rc_access)
+ val = bpcie_readl(base + (where & ~3));
+ else
+ val = brcm_pcie_ll_read_config(pcie, idx);
+
+ shift = (where & 3) << 3;
+ mask = (0xffffffff >> ((4 - size) << 3)) << shift;
+ *data = (val & mask) >> shift;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+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,bcm7445-pcie", .data = &generic_cfg },
+ {},
+};
+MODULE_DEVICE_TABLE(of, brcm_pcie_match);
+
+static struct pci_ops brcm_pcie_ops = {
+ .read = brcm_pcie_read_config,
+ .write = brcm_pcie_write_config,
+};
+
+static int brcm_pcie_probe(struct platform_device *pdev)
+{
+ struct device_node *dn = pdev->dev.of_node;
+ const u32 *log2_scb_sizes, *dma_ranges;
+ const struct brcm_pcie_cfg_data *data;
+ const struct of_device_id *of_id;
+ struct brcm_pcie *pcie;
+ void __iomem *base;
+ struct resource *r;
+ int i, rlen, ret;
+ u32 tmp;
+
+ pcie = devm_kzalloc(&pdev->dev, sizeof(struct brcm_pcie), GFP_KERNEL);
+ if (!pcie)
+ return -ENOMEM;
+
+ of_id = of_match_node(brcm_pcie_match, dn);
+ if (!of_id)
+ return -EINVAL;
+
+ data = of_id->data;
+ pcie->type = data->type;
+ pcie->ops = &data->ops;
+
+ platform_set_drvdata(pdev, pcie);
+
+ INIT_LIST_HEAD(&pcie->resource);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ ret = of_alias_get_id(dn, "pcie");
+ if (ret >= 0)
+ pcie->num = ret;
+
+ pcie->clk = devm_clk_get(&pdev->dev, "pcie");
+ if (IS_ERR(pcie->clk)) {
+ dev_err(&pdev->dev, "could not get clock\n");
+ pcie->clk = NULL;
+ }
+
+ ret = clk_prepare_enable(pcie->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "could not enable clock\n");
+ return ret;
+ }
+
+ pcie->dn = dn;
+ pcie->base = base;
+ pcie->dev = &pdev->dev;
+ pcie->dev->of_node = dn;
+ pcie->gen = 0;
+
+ ret = of_property_read_u32(dn, "brcm,gen", &tmp);
+ if (ret == 0) {
+ if (tmp > 0 && tmp < 3)
+ pcie->gen = (int)tmp;
+ else
+ dev_warn(pcie->dev, "bad DT value for prop 'brcm,gen");
+ } else if (ret != -EINVAL) {
+ dev_warn(pcie->dev, "error reading DT prop 'brcm,gen");
+ }
+
+ pcie->ssc = of_property_read_bool(dn, "brcm,ssc");
+
+ /* Get the value for the log2 of the scb sizes. Subtract 15 from
+ * each because the target register field has 0==disabled and 1==6KB.
+ */
+ log2_scb_sizes = of_get_property(dn, "brcm,log2-scb-sizes", &rlen);
+ if (log2_scb_sizes) {
+ for (i = 0; i < rlen / sizeof(u32); i++) {
+ pcie->scb_size_vals[i]
+ = (int)of_read_number(log2_scb_sizes + i, 1)
+ - 15;
+ pcie->num_memc++;
+ }
+ }
+
+ /* Look for the dma-ranges property. If it exists, issue a warning
+ * as PCIe drivers may not work. This is because the identity
+ * mapping between system memory and PCIe space is not preserved,
+ * and we need Linux to massage the dma_addr_t values it gets
+ * from dma memory allocation. This functionality will be added
+ * in the near future.
+ */
+ dma_ranges = of_get_property(dn, "dma-ranges", &rlen);
+ if (dma_ranges != NULL)
+ dev_warn(pcie->dev, "no identity map; PCI drivers may fail");
+
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ ret = irq_of_parse_and_map(pdev->dev.of_node, 1);
+ if (ret == 0)
+ dev_warn(pcie->dev, "cannot get msi intr; MSI disabled\n");
+ else
+ pcie->msi_irq = ret;
+ }
+
+ ret = of_pci_get_host_bridge_resources(dn, 0, 0xff,
+ &pcie->resource, NULL);
+ if (ret) {
+ dev_err(pcie->dev, "ranges parsing failed\n");
+ return ret;
+ }
+
+ ret = brcm_pcie_setup_early(pcie);
+ if (ret)
+ goto out_err_clk;
+
+ /* If setup bridge fails, it cleans up behind itself */
+ ret = brcm_setup_pcie_bridge(pcie);
+ if (ret)
+ goto out_err;
+
+ pcie->bus = pci_scan_root_bus(pcie->dev, pcie->num, &brcm_pcie_ops,
+ pcie, &pcie->resource);
+ if (!pcie->bus) {
+ ret = -ENOMEM;
+ goto out_err_bus;
+ }
+
+ if (IS_ENABLED(CONFIG_PCI_MSI))
+ brcm_pcie_msi_chip_set(pcie);
+
+ pci_bus_size_bridges(pcie->bus);
+ pci_bus_assign_resources(pcie->bus);
+
+ pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+ pci_bus_add_devices(pcie->bus);
+
+ return 0;
+
+out_err_bus:
+ brcm_pcie_enter_l23(pcie);
+ brcm_pcie_turn_off(pcie);
+out_err_clk:
+ clk_disable_unprepare(pcie->clk);
+out_err:
+ return ret;
+}
+
+static int brcm_pcie_remove(struct platform_device *pdev)
+{
+ return brcm_pcie_suspend(&pdev->dev);
+}
+
+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");
+MODULE_DESCRIPTION("Broadcom STB PCIE RC driver");
+MODULE_AUTHOR("Broadcom");
diff --git a/drivers/pci/host/pcie-brcmstb.h b/drivers/pci/host/pcie-brcmstb.h
new file mode 100644
index 000000000000..b4a507423bb0
--- /dev/null
+++ b/drivers/pci/host/pcie-brcmstb.h
@@ -0,0 +1,160 @@
+#ifndef __PCIE_BRCMSTB_H
+#define __PCIE_BRCMSTB_H
+
+#include <linux/io.h>
+
+/* Broadcom PCIE Offsets */
+#define PCIE_RC_CFG_PCIE_LINK_CAPABILITY 0x00b8
+#define PCIE_RC_CFG_PCIE_LINK_STATUS_CONTROL 0x00bc
+#define PCIE_RC_CFG_PCIE_ROOT_CAP_CONTROL 0x00c8
+#define PCIE_RC_CFG_PCIE_LINK_STATUS_CONTROL_2 0x00dc
+#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_BAR1_CONFIG_HI 0x4030
+#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_RC_BAR3_CONFIG_HI 0x4040
+#define PCIE_MISC_MSI_BAR_CONFIG_LO 0x4044
+#define PCIE_MISC_MSI_BAR_CONFIG_HI 0x4048
+#define PCIE_MISC_MSI_DATA_CONFIG 0x404c
+#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_HARD_PCIE_HARD_DEBUG 0x4204
+#define PCIE_INTR2_CPU_BASE 0x4300
+#define PCIE_MSI_INTR2_BASE 0x4500
+
+#define PCIE_RGR1_SW_INIT_1 0x9210
+#define PCIE_EXT_CFG_INDEX 0x9000
+#define PCIE_EXT_CFG_DATA 0x9004
+
+/* BCM7425 specific register offsets */
+#define BCM7425_PCIE_RGR1_SW_INIT_1 0x8010
+#define BCM7425_PCIE_EXT_CFG_INDEX 0x8300
+#define BCM7425_PCIE_EXT_CFG_DATA 0x8304
+
+#define PCI_BUSNUM_SHIFT 20
+#define PCI_SLOT_SHIFT 15
+#define PCI_FUNC_SHIFT 12
+
+#define BRCM_NUM_PCI_OUT_WINS 4
+#define BRCM_MAX_SCB 4
+
+/* Offsets from PCIE_INTR2_CPU_BASE and PCIE_MSI_INTR2_BASE */
+#define STATUS 0x0
+#define SET 0x4
+#define CLR 0x8
+#define MASK_STATUS 0xc
+#define MASK_SET 0x10
+#define MASK_CLR 0x14
+
+enum brcm_pcie_type {
+ BCM7425,
+ BCM7435,
+ GENERIC,
+};
+
+struct brcm_pcie;
+
+/* Chip-specific PCIe operations (read/write config and reset) */
+struct brcm_pcie_ll_ops {
+ u32 (*read_config)(struct brcm_pcie *pcie, int cfg_idx);
+ void (*write_config)(struct brcm_pcie *pcie, int cfg_idx, u32 val);
+ void (*rgr1_sw_init)(struct brcm_pcie *pcie, u32 mask,
+ int shift, u32 val);
+};
+
+struct brcm_pcie_cfg_data {
+ const enum brcm_pcie_type type;
+ const struct brcm_pcie_ll_ops ops;
+};
+
+struct brcm_msi;
+
+/* Internal Bus Controller Information.*/
+struct brcm_pcie {
+ void __iomem *base;
+ bool suspended;
+ struct clk *clk;
+ struct device_node *dn;
+ bool ssc;
+ int gen;
+ int scb_size_vals[BRCM_MAX_SCB];
+ struct pci_bus *bus;
+ struct device *dev;
+ struct list_head resource;
+ int msi_irq;
+ struct brcm_msi *msi;
+ unsigned int rev;
+ unsigned int num;
+ bool bridge_setup_done;
+ enum brcm_pcie_type type;
+ const struct brcm_pcie_ll_ops *ops;
+ unsigned int num_memc;
+};
+
+/* Helper functions to access read/write config space and software init which
+ * are chip-specific
+ */
+static inline u32 brcm_pcie_ll_read_config(struct brcm_pcie *pcie, int cfg_idx)
+{
+ return pcie->ops->read_config(pcie, cfg_idx);
+}
+
+static inline void brcm_pcie_ll_write_config(struct brcm_pcie *pcie,
+ int cfg_idx, u32 val)
+{
+ pcie->ops->write_config(pcie, cfg_idx, val);
+}
+
+static inline void brcm_pcie_rgr1_sw_init(struct brcm_pcie *pcie, u32 mask,
+ int shift, u32 val)
+{
+ pcie->ops->rgr1_sw_init(pcie, mask, shift, val);
+}
+
+/*
+ * MIPS endianness is configured by boot strap, which also reverses all
+ * bus endianness (i.e., big-endian CPU + big endian bus ==> native
+ * endian I/O).
+ *
+ * Other architectures (e.g., ARM) either do not support big endian, or
+ * else leave I/O in little endian mode.
+ */
+static inline u32 bpcie_readl(void __iomem *base)
+{
+ if (IS_ENABLED(CONFIG_MIPS))
+ return __raw_readl(base);
+ else
+ return readl(base);
+}
+
+static inline void bpcie_writel(u32 val, void __iomem *base)
+{
+ if (IS_ENABLED(CONFIG_MIPS))
+ __raw_writel(val, base);
+ else
+ writel(val, base);
+}
+
+#ifdef CONFIG_PCIE_BRCMSTB_MSI
+int brcm_pcie_enable_msi(struct brcm_pcie *pcie, int nr);
+void brcm_pcie_msi_chip_set(struct brcm_pcie *pcie);
+#else
+static inline int brcm_pcie_enable_msi(struct brcm_pcie *pcie, int nr)
+{
+ return 0;
+}
+static inline void brcm_pcie_msi_chip_set(struct brcm_pcie *pcie) { }
+#endif
+
+#endif /* __PCIE_BRCMSTB_H */
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
