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Message-Id: <1469760493-25821-2-git-send-email-shawn.lin@rock-chips.com>
Date: Fri, 29 Jul 2016 10:48:13 +0800
From: Shawn Lin <shawn.lin@...k-chips.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Marc Zyngier <marc.zyngier@....com>, linux-pci@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
Heiko Stuebner <heiko@...ech.de>,
Doug Anderson <dianders@...omium.org>,
Wenrui Li <wenrui.li@...k-chips.com>,
Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
Brian Norris <briannorris@...omium.org>,
Shawn Lin <shawn.lin@...k-chips.com>
Subject: [PATCH v8 2/2] PCI: Rockchip: Add Rockchip PCIe controller support
This patch adds Rockchip PCIe controller support found
on RK3399 Soc platform.
Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>
Reviewed-by: Brian Norris <briannorris@...omium.org>
---
Changes in v8:
- fix all the comments suggested by Bjorn Helgaas in v7[1]
[1] https://patchwork.kernel.org/patch/9233887/
- enable bandwith interrupt for debug
Changes in v7:
- make it as a build-in driver
- improve gen1/2 training timeout checking
- only clear known interrupt
- fix INTx for 0-base index
Changes in v6:
- use "depends on PCI_MSI_IRQ_DOMAIN" suggested by Arnd
Changes in v5:
- handle multiple pending INTx at the same time
suggested by Marc
Changes in v4:
- address the comments from Brain
Changes in v3:
- remove header file
- remove struct msi_controller and move most of variables
of rockchip_pcie_port to become the local ones.
- allow legacy int even if enabling MSI
- drop regulator set voltage operation suggested by Doug
Changes in v2:
- remove phy related stuff and call phy API
- add new head file and define lots of macro to make
the code more readable
- remove lots msi related code suggested by Marc
- add IO window address translation
- init_port and parse_dt reconstruction suggested by Bharat
- improve wr_own_conf suggested by Arnd
- make pcie as an interrupt controller and fix wrong int handler
suggested by Marc
- remove PCI_PROBE_ONLY suggested by Lorenzo
drivers/pci/host/Kconfig | 11 +
drivers/pci/host/Makefile | 1 +
drivers/pci/host/pcie-rockchip.c | 1257 ++++++++++++++++++++++++++++++++++++++
3 files changed, 1269 insertions(+)
create mode 100644 drivers/pci/host/pcie-rockchip.c
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index c917e2f..4d714d2 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -264,4 +264,15 @@ config PCIE_ARTPEC6
Say Y here to enable PCIe controller support on Axis ARTPEC-6
SoCs. This PCIe controller uses the DesignWare core.
+config PCIE_ROCKCHIP
+ bool "Rockchip PCIe controller"
+ depends on ARM64 && ARCH_ROCKCHIP
+ depends on OF
+ depends on PCI_MSI_IRQ_DOMAIN
+ select MFD_SYSCON
+ help
+ Say Y here if you want internal PCI support on Rockchip SoC.
+ There is 1 internal PCIe port available to support GEN2 with
+ 4 slots.
+
endmenu
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index 5bc0af2..695f716 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -30,3 +30,4 @@ obj-$(CONFIG_PCI_HOST_THUNDER_ECAM) += pci-thunder-ecam.o
obj-$(CONFIG_PCI_HOST_THUNDER_PEM) += pci-thunder-pem.o
obj-$(CONFIG_PCIE_ARMADA_8K) += pcie-armada8k.o
obj-$(CONFIG_PCIE_ARTPEC6) += pcie-artpec6.o
+obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
new file mode 100644
index 0000000..13ac199
--- /dev/null
+++ b/drivers/pci/host/pcie-rockchip.c
@@ -0,0 +1,1257 @@
+/*
+ * Rockchip AXI PCIe host controller driver
+ *
+ * Copyright (c) 2016 Rockchip, Inc.
+ *
+ * Author: Shawn Lin <shawn.lin@...k-chips.com>
+ * Wenrui Li <wenrui.li@...k-chips.com>
+ *
+ * Bits taken from Synopsys Designware Host controller driver and
+ * ARM PCI Host generic driver.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_pci.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/regmap.h>
+
+#define PCIE_CLIENT_BASE 0x0
+#define PCIE_RC_CONFIG_NORMAL_BASE 0x800000
+#define PCIE_RC_CONFIG_BASE 0xa00000
+#define PCIE_RC_CONFIG_LCSR_OFFSET 0xd0
+#define PCIE_RC_CONFIG_LCSR_BW_ENA 0x1
+#define PCIE_RC_CONFIG_LCSR_LBMIE BIT(10)
+#define PCIE_RC_CONFIG_LCSR_LABIE BIT(11)
+#define PCIE_RC_CONFIG_LCSR_LBMS BIT(30)
+#define PCIE_RC_CONFIG_LCSR_LAMS BIT(31)
+#define PCIE_CORE_LINK_CTRL_STATUS 0x8000d0
+#define PCIE_CORE_CTRL_MGMT_BASE 0x900000
+#define PCIE_CORE_AXI_CONF_BASE 0xc00000
+#define PCIE_CORE_AXI_INBOUND_BASE 0xc00800
+#define PCIE_CLIENT_BASIC_STATUS0 0x44
+#define PCIE_CLIENT_BASIC_STATUS1 0x48
+#define PCIE_CLIENT_INT_MASK 0x4c
+#define PCIE_CLIENT_INT_STATUS 0x50
+#define PCIE_CLIENT_INT_LEGACY_DONE BIT(15)
+#define PCIE_CLIENT_INT_MSG BIT(14)
+#define PCIE_CLIENT_INT_HOT_RST BIT(13)
+#define PCIE_CLIENT_INT_DPA BIT(12)
+#define PCIE_CLIENT_INT_FATAL_ERR BIT(11)
+#define PCIE_CLIENT_INT_NFATAL_ERR BIT(10)
+#define PCIE_CLIENT_INT_CORR_ERR BIT(9)
+#define PCIE_CLIENT_INT_INTD BIT(8)
+#define PCIE_CLIENT_INT_INTC BIT(7)
+#define PCIE_CLIENT_INT_INTB BIT(6)
+#define PCIE_CLIENT_INT_INTA BIT(5)
+#define PCIE_CLIENT_INT_LOCAL BIT(4)
+#define PCIE_CLIENT_INT_UDMA BIT(3)
+#define PCIE_CLIENT_INT_PHY BIT(2)
+#define PCIE_CLIENT_INT_HOT_PLUG BIT(1)
+#define PCIE_CLIENT_INT_PWR_STCG BIT(0)
+#define PCIE_RC_CONFIG_RID_CCR 0x8
+#define PCIE_RC_CONFIG_LCS 0xd0
+#define PCIE_RC_BAR_CONF 0x300
+#define PCIE_CORE_OB_REGION_ADDR1 0x4
+#define PCIE_CORE_OB_REGION_DESC0 0x8
+#define PCIE_CORE_OB_REGION_DESC1 0xc
+#define PCIE_CORE_OB_REGION_ADDR0_NUM_BITS 0x3fU
+#define PCIE_CORE_OB_REGION_ADDR0_LO_ADDR 0xffffff00U
+#define PCIE_CORE_IB_REGION_ADDR0_NUM_BITS 0x3fU
+#define PCIE_CORE_IB_REGION_ADDR0_LO_ADDR 0xffffff00U
+#define PCIE_RP_IB_ADDR_TRANS 0x4
+#define PCIE_CORE_INT_MASK 0x900210
+#define PCIE_CORE_INT_STATUS 0x90020c
+#define PCIE_CORE_INT_PRFPE BIT(0)
+#define PCIE_CORE_INT_CRFPE BIT(1)
+#define PCIE_CORE_INT_RRPE BIT(2)
+#define PCIE_CORE_INT_PRFO BIT(3)
+#define PCIE_CORE_INT_CRFO BIT(4)
+#define PCIE_CORE_INT_RT BIT(5)
+#define PCIE_CORE_INT_RTR BIT(6)
+#define PCIE_CORE_INT_PE BIT(7)
+#define PCIE_CORE_INT_MTR BIT(8)
+#define PCIE_CORE_INT_UCR BIT(9)
+#define PCIE_CORE_INT_FCE BIT(10)
+#define PCIE_CORE_INT_CT BIT(11)
+#define PCIE_CORE_INT_UTC BIT(18)
+#define PCIE_CORE_INT_MMVC BIT(19)
+
+/* Size of one AXI Region (not Region 0) */
+#define AXI_REGION_SIZE BIT(20)
+/* Size of Region 0, equal to sum of sizes of other regions */
+#define AXI_REGION_0_SIZE (32 * (0x1 << 20))
+#define OB_REG_SIZE_SHIFT 5
+#define IB_ROOT_PORT_REG_SIZE_SHIFT 3
+#define AXI_WRAPPER_IO_WRITE 0x6
+#define AXI_WRAPPER_MEM_WRITE 0x2
+#define MAX_AXI_IB_ROOTPORT_REGION_NUM 3
+#define MIN_AXI_ADDR_BITS_PASSED 8
+#define ROCKCHIP_VENDOR_ID 0x1d87
+#define PCIE_ECAM_BUS(x) (((x) & 0xff) << 20)
+#define PCIE_ECAM_DEV(x) (((x) & 0x1f) << 15)
+#define PCIE_ECAM_FUNC(x) (((x) & 0x7) << 12)
+#define PCIE_ECAM_REG(x) (((x) & 0xfff) << 0)
+#define PCIE_ECAM_ADDR(bus, dev, func, reg) \
+ (PCIE_ECAM_BUS(bus) | PCIE_ECAM_DEV(dev) | \
+ PCIE_ECAM_FUNC(func) | PCIE_ECAM_REG(reg))
+
+/*
+ * The higher 16-bit of this register is used for write protection
+ * only if BIT(x + 16) set to 1 the BIT(x) can be written.
+ */
+#define HIWORD_UPDATE(val, mask, shift) \
+ ((val) << (shift) | (mask) << ((shift) + 16))
+
+#define RC_REGION_0_ADDR_TRANS_H 0x00000000
+#define RC_REGION_0_ADDR_TRANS_L 0x00000000
+#define RC_REGION_0_PASS_BITS (25 - 1)
+#define RC_REGION_1_ADDR_TRANS_H 0x00000000
+#define RC_REGION_1_ADDR_TRANS_L 0x00400000
+#define RC_REGION_1_PASS_BITS (20 - 1)
+#define MAX_AXI_WRAPPER_REGION_NUM 33
+#define PCIE_CORE_LCSR_RETRAIN_LINK BIT(5)
+#define PCIE_CLIENT_CONF_ENABLE 1
+#define PCIE_CLIENT_CONF_ENABLE_SHIFT 0
+#define PCIE_CLIENT_CONF_ENABLE_MASK 0x1
+#define PCIE_CLIENT_LINK_TRAIN_ENABLE 1
+#define PCIE_CLIENT_LINK_TRAIN_SHIFT 1
+#define PCIE_CLIENT_LINK_TRAIN_MASK 0x1
+#define PCIE_CLIENT_ARI_ENABLE 1
+#define PCIE_CLIENT_ARI_ENABLE_SHIFT 3
+#define PCIE_CLIENT_ARI_ENABLE_MASK 0x1
+#define PCIE_CLIENT_CONF_LANE_NUM(x) (x / 2)
+#define PCIE_CLIENT_CONF_LANE_NUM_SHIFT 4
+#define PCIE_CLIENT_CONF_LANE_NUM_MASK 0x3
+#define PCIE_CLIENT_MODE_RC 1
+#define PCIE_CLIENT_MODE_SHIFT 6
+#define PCIE_CLIENT_MODE_MASK 0x1
+#define PCIE_CLIENT_GEN_SEL_2 1
+#define PCIE_CLIENT_GEN_SEL_1 0
+#define PCIE_CLIENT_GEN_SEL_SHIFT 7
+#define PCIE_CLIENT_GEN_SEL_MASK 0x1
+#define PCIE_CLIENT_LINK_STATUS_UP 0x3
+#define PCIE_CLIENT_LINK_STATUS_SHIFT 20
+#define PCIE_CLIENT_LINK_STATUS_MASK 0x3
+#define PCIE_CORE_PL_CONF_SPEED_2_5G 0x0
+#define PCIE_CORE_PL_CONF_SPEED_5G 0x1
+#define PCIE_CORE_PL_CONF_SPEED_8G 0x2
+#define PCIE_CORE_PL_CONF_SPEED_SHIFT 3
+#define PCIE_CORE_PL_CONF_SPEED_MASK 0x3
+#define PCIE_CORE_PL_CONF_LANE_SHIFT 1
+#define PCIE_CORE_PL_CONF_LANE_MASK 0x3
+#define PCIE_CORE_RC_CONF_SCC_SHIFT 16
+
+#define ROCKCHIP_PCIE_RPIFR1_INTR_MASK GENMASK(8, 5)
+#define ROCKCHIP_PCIE_RPIFR1_INTR_SHIFT 5
+
+#define PCIE_CORE_INT \
+ (PCIE_CORE_INT_PRFPE | PCIE_CORE_INT_CRFPE | \
+ PCIE_CORE_INT_RRPE | PCIE_CORE_INT_CRFO | \
+ PCIE_CORE_INT_RT | PCIE_CORE_INT_RTR | \
+ PCIE_CORE_INT_PE | PCIE_CORE_INT_MTR | \
+ PCIE_CORE_INT_UCR | PCIE_CORE_INT_FCE | \
+ PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
+ PCIE_CORE_INT_MMVC)
+
+#define PCIE_CLIENT_INT_SUBSYSTEM \
+ (PCIE_CLIENT_INT_PWR_STCG | PCIE_CLIENT_INT_HOT_PLUG | \
+ PCIE_CLIENT_INT_PHY | PCIE_CLIENT_INT_UDMA | \
+ PCIE_CLIENT_INT_LOCAL)
+
+#define PCIE_CLIENT_INT_LEGACY \
+ (PCIE_CLIENT_INT_INTA | PCIE_CLIENT_INT_INTB | \
+ PCIE_CLIENT_INT_INTC | PCIE_CLIENT_INT_INTD)
+
+#define PCIE_CLIENT_INT_CLI \
+ (PCIE_CLIENT_INT_CORR_ERR | PCIE_CLIENT_INT_NFATAL_ERR | \
+ PCIE_CLIENT_INT_FATAL_ERR | PCIE_CLIENT_INT_DPA | \
+ PCIE_CLIENT_INT_HOT_RST | PCIE_CLIENT_INT_MSG | \
+ PCIE_CLIENT_INT_LEGACY_DONE | PCIE_CLIENT_INT_LEGACY | \
+ PCIE_CLIENT_INT_PHY)
+
+struct rockchip_pcie_port {
+ void __iomem *reg_base;
+ void __iomem *apb_base;
+ struct phy *phy;
+ struct reset_control *core_rst;
+ struct reset_control *mgmt_rst;
+ struct reset_control *mgmt_sticky_rst;
+ struct reset_control *pipe_rst;
+ struct clk *aclk_pcie;
+ struct clk *aclk_perf_pcie;
+ struct clk *hclk_pcie;
+ struct clk *clk_pcie_pm;
+ struct regulator *vpcie3v3; /* 3.3V power supply */
+ struct regulator *vpcie1v8; /* 1.8V power supply */
+ struct regulator *vpcie0v9; /* 0.9V power supply */
+ struct gpio_desc *ep_gpio;
+ u32 lanes;
+ u8 root_bus_nr;
+ struct device *dev;
+ struct irq_domain *irq_domain;
+};
+
+static inline u32 pcie_read(struct rockchip_pcie_port *port, u32 reg)
+{
+ return readl(port->apb_base + reg);
+}
+
+static inline void pcie_write(struct rockchip_pcie_port *port,
+ u32 val, u32 reg)
+{
+ writel(val, port->apb_base + reg);
+}
+
+static void rockchip_pcie_enable_bw_int(struct rockchip_pcie_port *port)
+{
+ u32 status;
+
+ status = pcie_read(port, PCIE_RC_CONFIG_BASE +
+ PCIE_RC_CONFIG_LCSR_OFFSET);
+ status |= (PCIE_RC_CONFIG_LCSR_LBMIE | PCIE_RC_CONFIG_LCSR_LABIE);
+ pcie_write(port, status, PCIE_RC_CONFIG_BASE +
+ PCIE_RC_CONFIG_LCSR_OFFSET);
+}
+
+static void rockchip_pcie_clr_bw_int(struct rockchip_pcie_port *port)
+{
+ u32 status;
+
+ status = pcie_read(port, PCIE_RC_CONFIG_BASE +
+ PCIE_RC_CONFIG_LCSR_OFFSET);
+ status |= (PCIE_RC_CONFIG_LCSR_LBMS | PCIE_RC_CONFIG_LCSR_LAMS);
+ pcie_write(port, status, PCIE_RC_CONFIG_BASE +
+ PCIE_RC_CONFIG_LCSR_OFFSET);
+}
+
+static int rockchip_pcie_valid_config(struct rockchip_pcie_port *pp,
+ struct pci_bus *bus, int dev)
+{
+ /* access only one slot on each root port */
+ if (bus->number == pp->root_bus_nr && dev > 0)
+ return 0;
+
+ /*
+ * do not read more than one device on the bus directly attached
+ * to RC's downstream side.
+ */
+ if (bus->primary == pp->root_bus_nr && dev > 0)
+ return 0;
+
+ return 1;
+}
+
+static int rockchip_pcie_rd_own_conf(struct rockchip_pcie_port *pp,
+ int where, int size,
+ u32 *val)
+{
+ void __iomem *addr = pp->apb_base + PCIE_RC_CONFIG_BASE + where;
+
+ if (!IS_ALIGNED((uintptr_t)addr, size)) {
+ *val = 0;
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+
+ if (size == 4) {
+ *val = readl(addr);
+ } else if (size == 2) {
+ *val = readw(addr);
+ } else if (size == 1) {
+ *val = readb(addr);
+ } else {
+ *val = 0;
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_wr_own_conf(struct rockchip_pcie_port *pp,
+ int where, int size, u32 val)
+{
+ u32 mask, tmp, offset;
+
+ offset = (where & (~0x3));
+
+ if (size == 4) {
+ writel(val, pp->apb_base + PCIE_RC_CONFIG_BASE + offset);
+ return PCIBIOS_SUCCESSFUL;
+ }
+
+ mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
+
+ tmp = readl(pp->apb_base + PCIE_RC_CONFIG_BASE + offset) & mask;
+ tmp |= val << ((where & 0x3) * 8);
+ writel(tmp, pp->apb_base + PCIE_RC_CONFIG_BASE + offset);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_rd_other_conf(struct rockchip_pcie_port *pp,
+ struct pci_bus *bus, u32 devfn,
+ int where, int size, u32 *val)
+{
+ u32 busdev;
+
+ busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
+ PCI_FUNC(devfn), where);
+
+ if (!IS_ALIGNED(busdev, size)) {
+ *val = 0;
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+
+ if (size == 4) {
+ *val = readl(pp->reg_base + busdev);
+ } else if (size == 2) {
+ *val = readw(pp->reg_base + busdev);
+ } else if (size == 1) {
+ *val = readb(pp->reg_base + busdev);
+ } else {
+ *val = 0;
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_wr_other_conf(struct rockchip_pcie_port *pp,
+ struct pci_bus *bus, u32 devfn,
+ int where, int size, u32 val)
+{
+ u32 busdev;
+
+ busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
+ PCI_FUNC(devfn), where);
+ if (!IS_ALIGNED(busdev, size))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ if (size == 4)
+ writel(val, pp->reg_base + busdev);
+ else if (size == 2)
+ writew(val, pp->reg_base + busdev);
+ else if (size == 1)
+ writeb(val, pp->reg_base + busdev);
+ else
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
+ int size, u32 *val)
+{
+ struct rockchip_pcie_port *pp = bus->sysdata;
+
+ if (rockchip_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
+ *val = 0xffffffff;
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
+ if (bus->number != pp->root_bus_nr)
+ return rockchip_pcie_rd_other_conf(pp, bus, devfn,
+ where, size, val);
+
+ return rockchip_pcie_rd_own_conf(pp, where, size, val);
+}
+
+static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+ int where, int size, u32 val)
+{
+ struct rockchip_pcie_port *pp = bus->sysdata;
+ int ret;
+
+ if (rockchip_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (bus->number != pp->root_bus_nr)
+ ret = rockchip_pcie_wr_other_conf(pp, bus, devfn,
+ where, size, val);
+ else
+ ret = rockchip_pcie_wr_own_conf(pp, where, size, val);
+
+ return ret;
+}
+
+static struct pci_ops rockchip_pcie_ops = {
+ .read = rockchip_pcie_rd_conf,
+ .write = rockchip_pcie_wr_conf,
+};
+
+/**
+ * rockchip_pcie_init_port - Initialize hardware
+ * @port: PCIe port information
+ */
+static int rockchip_pcie_init_port(struct rockchip_pcie_port *port)
+{
+ int err;
+ u32 status;
+ unsigned long timeout;
+
+ gpiod_set_value(port->ep_gpio, 0);
+
+ err = phy_init(port->phy);
+ if (err < 0) {
+ dev_err(port->dev, "fail to init phy, err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_assert(port->core_rst);
+ if (err) {
+ dev_err(port->dev, "assert core_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_assert(port->mgmt_rst);
+ if (err) {
+ dev_err(port->dev, "assert mgmt_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_assert(port->mgmt_sticky_rst);
+ if (err) {
+ dev_err(port->dev, "assert mgmt_sticky_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_assert(port->pipe_rst);
+ if (err) {
+ dev_err(port->dev, "assert pipe_rst err %d\n", err);
+ return err;
+ }
+
+ pcie_write(port,
+ HIWORD_UPDATE(PCIE_CLIENT_CONF_ENABLE,
+ PCIE_CLIENT_CONF_ENABLE_MASK,
+ PCIE_CLIENT_CONF_ENABLE_SHIFT) |
+ HIWORD_UPDATE(PCIE_CLIENT_CONF_LANE_NUM(port->lanes),
+ PCIE_CLIENT_CONF_LANE_NUM_MASK,
+ PCIE_CLIENT_CONF_LANE_NUM_SHIFT) |
+ HIWORD_UPDATE(PCIE_CLIENT_MODE_RC,
+ PCIE_CLIENT_MODE_MASK,
+ PCIE_CLIENT_MODE_SHIFT) |
+ HIWORD_UPDATE(PCIE_CLIENT_ARI_ENABLE,
+ PCIE_CLIENT_ARI_ENABLE_MASK,
+ PCIE_CLIENT_ARI_ENABLE_SHIFT) |
+ HIWORD_UPDATE(PCIE_CLIENT_GEN_SEL_2,
+ PCIE_CLIENT_GEN_SEL_MASK,
+ PCIE_CLIENT_GEN_SEL_SHIFT),
+ PCIE_CLIENT_BASE);
+
+ err = phy_power_on(port->phy);
+ if (err) {
+ dev_err(port->dev, "fail to power on phy, err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_deassert(port->core_rst);
+ if (err) {
+ dev_err(port->dev, "deassert core_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_deassert(port->mgmt_rst);
+ if (err) {
+ dev_err(port->dev, "deassert mgmt_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_deassert(port->mgmt_sticky_rst);
+ if (err) {
+ dev_err(port->dev, "deassert mgmt_sticky_rst err %d\n", err);
+ return err;
+ }
+
+ err = reset_control_deassert(port->pipe_rst);
+ if (err) {
+ dev_err(port->dev, "deassert pipe_rst err %d\n", err);
+ return err;
+ }
+
+ /* Enable Gen1 training */
+ pcie_write(port,
+ HIWORD_UPDATE(PCIE_CLIENT_LINK_TRAIN_ENABLE,
+ PCIE_CLIENT_LINK_TRAIN_MASK,
+ PCIE_CLIENT_LINK_TRAIN_SHIFT),
+ PCIE_CLIENT_BASE);
+
+ gpiod_set_value(port->ep_gpio, 1);
+
+ /* 500ms timeout value should be enough for Gen1/2 training */
+ timeout = jiffies + msecs_to_jiffies(500);
+
+ for (;;) {
+ status = pcie_read(port, PCIE_CLIENT_BASIC_STATUS1);
+ if (((status >> PCIE_CLIENT_LINK_STATUS_SHIFT) &
+ PCIE_CLIENT_LINK_STATUS_MASK) ==
+ PCIE_CLIENT_LINK_STATUS_UP) {
+ dev_dbg(port->dev, "PCIe link training gen1 pass!\n");
+ break;
+ }
+
+ msleep(20);
+
+ if (!time_before(jiffies, timeout)) {
+ err = -ETIMEDOUT;
+ break;
+ }
+
+ }
+
+ /* Double check gen1 training */
+ if (err) {
+ status = pcie_read(port, PCIE_CLIENT_BASIC_STATUS1);
+ err = (((status >> PCIE_CLIENT_LINK_STATUS_SHIFT) &
+ PCIE_CLIENT_LINK_STATUS_MASK) ==
+ PCIE_CLIENT_LINK_STATUS_UP) ? 0 : -ETIMEDOUT;
+ if (err) {
+ dev_err(port->dev, "PCIe link training gen1 timeout!\n");
+ return err;
+ }
+ }
+
+ /*
+ * Enable retrain for gen2. This should be configured only after
+ * gen1 finished.
+ */
+ status = pcie_read(port,
+ PCIE_RC_CONFIG_LCS + PCIE_RC_CONFIG_BASE);
+ status |= PCIE_CORE_LCSR_RETRAIN_LINK;
+ pcie_write(port, status,
+ PCIE_RC_CONFIG_LCS + PCIE_RC_CONFIG_BASE);
+
+ timeout = jiffies + msecs_to_jiffies(500);
+ for (;;) {
+ status = pcie_read(port, PCIE_CORE_CTRL_MGMT_BASE);
+ if (((status >> PCIE_CORE_PL_CONF_SPEED_SHIFT) &
+ PCIE_CORE_PL_CONF_SPEED_MASK) ==
+ PCIE_CORE_PL_CONF_SPEED_5G) {
+ dev_dbg(port->dev, "PCIe link training gen2 pass!\n");
+ break;
+ }
+
+ msleep(20);
+
+ if (!time_before(jiffies, timeout)) {
+ err = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ /* Double check gen2 training */
+ if (err) {
+ status = pcie_read(port, PCIE_CORE_CTRL_MGMT_BASE);
+ err = (((status >> PCIE_CORE_PL_CONF_SPEED_SHIFT) &
+ PCIE_CORE_PL_CONF_SPEED_MASK) ==
+ PCIE_CORE_PL_CONF_SPEED_5G) ? 0 : -ETIMEDOUT;
+ if (err)
+ dev_dbg(port->dev, "PCIe link training gen2 timeout, fall back to gen1!\n");
+ }
+
+ /* Check the final link width from negotiated lane counter from MGMT */
+ status = pcie_read(port, PCIE_CORE_CTRL_MGMT_BASE);
+ status = 0x1 << ((status >> PCIE_CORE_PL_CONF_LANE_SHIFT) &
+ PCIE_CORE_PL_CONF_LANE_MASK);
+ dev_dbg(port->dev, "current link width is x%d\n", status);
+
+ pcie_write(port, ROCKCHIP_VENDOR_ID, PCIE_RC_CONFIG_BASE);
+ pcie_write(port, PCI_CLASS_BRIDGE_PCI << PCIE_CORE_RC_CONF_SCC_SHIFT,
+ PCIE_RC_CONFIG_BASE + PCIE_RC_CONFIG_RID_CCR);
+ pcie_write(port, 0x0, PCIE_CORE_CTRL_MGMT_BASE + PCIE_RC_BAR_CONF);
+
+ pcie_write(port, (RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
+ PCIE_CORE_AXI_CONF_BASE);
+ pcie_write(port, RC_REGION_0_ADDR_TRANS_H,
+ PCIE_CORE_AXI_CONF_BASE + PCIE_CORE_OB_REGION_ADDR1);
+ pcie_write(port, 0x0080000a,
+ PCIE_CORE_AXI_CONF_BASE + PCIE_CORE_OB_REGION_DESC0);
+ pcie_write(port, 0x0,
+ PCIE_CORE_AXI_CONF_BASE + PCIE_CORE_OB_REGION_DESC1);
+
+ return 0;
+}
+
+static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
+{
+ struct rockchip_pcie_port *pp = arg;
+ u32 reg;
+ u32 sub_reg;
+
+ reg = pcie_read(pp, PCIE_CLIENT_INT_STATUS);
+ if (reg & PCIE_CLIENT_INT_LOCAL) {
+ dev_dbg(pp->dev, "local interrupt received\n");
+ sub_reg = pcie_read(pp, PCIE_CORE_INT_STATUS);
+ if (sub_reg & PCIE_CORE_INT_PRFPE)
+ dev_dbg(pp->dev, "parity error detected while reading from the PNP receive FIFO RAM\n");
+
+ if (sub_reg & PCIE_CORE_INT_CRFPE)
+ dev_dbg(pp->dev, "parity error detected while reading from the Completion Receive FIFO RAM\n");
+
+ if (sub_reg & PCIE_CORE_INT_RRPE)
+ dev_dbg(pp->dev, "parity error detected while reading from replay buffer RAM\n");
+
+ if (sub_reg & PCIE_CORE_INT_PRFO)
+ dev_dbg(pp->dev, "overflow occurred in the PNP receive FIFO\n");
+
+ if (sub_reg & PCIE_CORE_INT_CRFO)
+ dev_dbg(pp->dev, "overflow occurred in the completion receive FIFO\n");
+
+ if (sub_reg & PCIE_CORE_INT_RT)
+ dev_dbg(pp->dev, "replay timer timed out\n");
+
+ if (sub_reg & PCIE_CORE_INT_RTR)
+ dev_dbg(pp->dev, "replay timer rolled over after 4 transmissions of the same TLP\n");
+
+ if (sub_reg & PCIE_CORE_INT_PE)
+ dev_dbg(pp->dev, "phy error detected on receive side\n");
+
+ if (sub_reg & PCIE_CORE_INT_MTR)
+ dev_dbg(pp->dev, "malformed TLP received from the link\n");
+
+ if (sub_reg & PCIE_CORE_INT_UCR)
+ dev_dbg(pp->dev, "malformed TLP received from the link\n");
+
+ if (sub_reg & PCIE_CORE_INT_FCE)
+ dev_dbg(pp->dev, "an error was observed in the flow control advertisements from the other side\n");
+
+ if (sub_reg & PCIE_CORE_INT_CT)
+ dev_dbg(pp->dev, "a request timed out waiting for completion\n");
+
+ if (sub_reg & PCIE_CORE_INT_UTC)
+ dev_dbg(pp->dev, "unmapped TC error\n");
+
+ if (sub_reg & PCIE_CORE_INT_MMVC)
+ dev_dbg(pp->dev, "MSI mask register changes\n");
+
+ pcie_write(pp, sub_reg, PCIE_CORE_INT_STATUS);
+ } else if (reg & PCIE_CLIENT_INT_PHY) {
+ dev_dbg(pp->dev, "phy link changes\n");
+ rockchip_pcie_clr_bw_int(pp);
+ }
+
+ pcie_write(pp, reg & PCIE_CLIENT_INT_LOCAL, PCIE_CLIENT_INT_STATUS);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t rockchip_pcie_client_irq_handler(int irq, void *arg)
+{
+ struct rockchip_pcie_port *pp = arg;
+ u32 reg;
+
+ reg = pcie_read(pp, PCIE_CLIENT_INT_STATUS);
+ if (reg & PCIE_CLIENT_INT_LEGACY_DONE)
+ dev_dbg(pp->dev, "legacy done interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_MSG)
+ dev_dbg(pp->dev, "message done interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_HOT_RST)
+ dev_dbg(pp->dev, "hot reset interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_DPA)
+ dev_dbg(pp->dev, "dpa interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_FATAL_ERR)
+ dev_dbg(pp->dev, "fatal error interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_NFATAL_ERR)
+ dev_dbg(pp->dev, "no fatal error interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_CORR_ERR)
+ dev_dbg(pp->dev, "correctable error interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_PHY)
+ dev_dbg(pp->dev, "phy interrupt received\n");
+
+ pcie_write(pp, reg & (PCIE_CLIENT_INT_LEGACY_DONE |
+ PCIE_CLIENT_INT_MSG | PCIE_CLIENT_INT_HOT_RST |
+ PCIE_CLIENT_INT_DPA | PCIE_CLIENT_INT_FATAL_ERR |
+ PCIE_CLIENT_INT_NFATAL_ERR |
+ PCIE_CLIENT_INT_CORR_ERR),
+ PCIE_CLIENT_INT_STATUS |
+ PCIE_CLIENT_INT_PHY);
+ return IRQ_HANDLED;
+}
+
+static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct rockchip_pcie_port *port;
+ u32 reg;
+ u32 hwirq;
+ u32 virq;
+
+ chained_irq_enter(chip, desc);
+ port = irq_desc_get_handler_data(desc);
+
+ reg = pcie_read(port, PCIE_CLIENT_INT_STATUS);
+ reg = (reg & ROCKCHIP_PCIE_RPIFR1_INTR_MASK) >>
+ ROCKCHIP_PCIE_RPIFR1_INTR_SHIFT;
+
+ while (reg) {
+ hwirq = ffs(reg) - 1;
+ reg &= ~BIT(hwirq);
+
+ virq = irq_find_mapping(port->irq_domain, hwirq);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_err(port->dev, "unexpected IRQ, INT%d\n", hwirq);
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+
+/**
+ * rockchip_pcie_parse_dt - Parse Device tree
+ * @port: PCIe port information
+ *
+ * Return: '0' on success and error value on failure
+ */
+static int rockchip_pcie_parse_dt(struct rockchip_pcie_port *port)
+{
+ struct device *dev = port->dev;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct device_node *node = dev->of_node;
+ struct resource *regs;
+ int irq;
+ int err;
+
+ regs = platform_get_resource_byname(pdev,
+ IORESOURCE_MEM,
+ "axi-base");
+ if (!regs) {
+ dev_err(dev, "missing axi-base property\n");
+ return -ENODEV;
+ }
+
+ port->reg_base = devm_ioremap_resource(dev, regs);
+ if (IS_ERR(port->reg_base))
+ return PTR_ERR(port->reg_base);
+
+ regs = platform_get_resource_byname(pdev,
+ IORESOURCE_MEM,
+ "apb-base");
+ if (!regs) {
+ dev_err(dev, "missing apb-base property\n");
+ return -ENODEV;
+ }
+
+ port->apb_base = devm_ioremap_resource(dev, regs);
+ if (IS_ERR(port->apb_base))
+ return PTR_ERR(port->apb_base);
+
+ port->phy = devm_phy_get(dev, "pcie-phy");
+ if (IS_ERR(port->phy)) {
+ if (PTR_ERR(port->phy) != -EPROBE_DEFER)
+ dev_err(dev, "Missing phy\n");
+ return PTR_ERR(port->phy);
+ }
+
+ port->lanes = 1;
+ err = of_property_read_u32(node, "num-lanes", &port->lanes);
+ if (!err && ((port->lanes == 0) ||
+ (port->lanes == 3) ||
+ (port->lanes > 4))) {
+ dev_warn(dev, "invalid num-lanes, default use one lane\n");
+ port->lanes = 1;
+ }
+
+ port->core_rst = devm_reset_control_get(dev, "core");
+ if (IS_ERR(port->core_rst)) {
+ if (PTR_ERR(port->core_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing core rst property in node\n");
+ return PTR_ERR(port->core_rst);
+ }
+
+ port->mgmt_rst = devm_reset_control_get(dev, "mgmt");
+ if (IS_ERR(port->mgmt_rst)) {
+ if (PTR_ERR(port->mgmt_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing mgmt rst property in node\n");
+ return PTR_ERR(port->mgmt_rst);
+ }
+
+ port->mgmt_sticky_rst = devm_reset_control_get(dev, "mgmt-sticky");
+ if (IS_ERR(port->mgmt_sticky_rst)) {
+ if (PTR_ERR(port->mgmt_sticky_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing mgmt-sticky rst property in node\n");
+ return PTR_ERR(port->mgmt_sticky_rst);
+ }
+
+ port->pipe_rst = devm_reset_control_get(dev, "pipe");
+ if (IS_ERR(port->pipe_rst)) {
+ if (PTR_ERR(port->pipe_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing pipe rst property in node\n");
+ return PTR_ERR(port->pipe_rst);
+ }
+
+ port->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
+ if (IS_ERR(port->ep_gpio)) {
+ dev_err(dev, "missing ep-gpios property in node\n");
+ return PTR_ERR(port->ep_gpio);
+ }
+
+ port->aclk_pcie = devm_clk_get(dev, "aclk");
+ if (IS_ERR(port->aclk_pcie)) {
+ dev_err(dev, "aclk clock not found\n");
+ return PTR_ERR(port->aclk_pcie);
+ }
+
+ port->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
+ if (IS_ERR(port->aclk_perf_pcie)) {
+ dev_err(dev, "aclk_perf clock not found\n");
+ return PTR_ERR(port->aclk_perf_pcie);
+ }
+
+ port->hclk_pcie = devm_clk_get(dev, "hclk");
+ if (IS_ERR(port->hclk_pcie)) {
+ dev_err(dev, "hclk clock not found\n");
+ return PTR_ERR(port->hclk_pcie);
+ }
+
+ port->clk_pcie_pm = devm_clk_get(dev, "pm");
+ if (IS_ERR(port->clk_pcie_pm)) {
+ dev_err(dev, "pm clock not found\n");
+ return PTR_ERR(port->clk_pcie_pm);
+ }
+
+ irq = platform_get_irq_byname(pdev, "sys");
+ if (irq < 0) {
+ dev_err(dev, "missing sys IRQ resource\n");
+ return -EINVAL;
+ }
+
+ err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
+ IRQF_SHARED, "pcie-sys", port);
+ if (err) {
+ dev_err(dev, "failed to request pcie subsystem IRQ\n");
+ return err;
+ }
+
+ irq = platform_get_irq_byname(pdev, "legacy");
+ if (irq < 0) {
+ dev_err(dev, "missing legacy IRQ resource\n");
+ return -EINVAL;
+ }
+
+ irq_set_chained_handler_and_data(irq,
+ rockchip_pcie_legacy_int_handler,
+ port);
+
+ irq = platform_get_irq_byname(pdev, "client");
+ if (irq < 0) {
+ dev_err(dev, "missing client IRQ resource\n");
+ return -EINVAL;
+ }
+
+ err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
+ IRQF_SHARED, "pcie-client", port);
+ if (err) {
+ dev_err(dev, "failed to request pcie client IRQ\n");
+ return err;
+ }
+
+ port->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
+ if (IS_ERR(port->vpcie3v3)) {
+ if (PTR_ERR(port->vpcie3v3) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no vpcie3v3 regulator found\n");
+ }
+
+ port->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8");
+ if (IS_ERR(port->vpcie1v8)) {
+ if (PTR_ERR(port->vpcie1v8) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no vpcie1v8 regulator found\n");
+ }
+
+ port->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9");
+ if (IS_ERR(port->vpcie0v9)) {
+ if (PTR_ERR(port->vpcie0v9) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no vpcie0v9 regulator found\n");
+ }
+
+ return 0;
+}
+
+static int rockchip_pcie_set_vpcie(struct rockchip_pcie_port *port)
+{
+ int err;
+
+ if (!IS_ERR(port->vpcie3v3)) {
+ err = regulator_enable(port->vpcie3v3);
+ if (err) {
+ dev_err(port->dev, "Fail to enable vpcie3v3 regulator.\n");
+ goto err_out;
+ }
+ }
+
+ if (!IS_ERR(port->vpcie1v8)) {
+ err = regulator_enable(port->vpcie1v8);
+ if (err) {
+ dev_err(port->dev, "Fail to enable vpcie1v8 regulator.\n");
+ goto err_disable_3v3;
+ }
+ }
+
+ if (!IS_ERR(port->vpcie0v9)) {
+ err = regulator_enable(port->vpcie0v9);
+ if (err) {
+ dev_err(port->dev, "Fail to enable vpcie0v9 regulator.\n");
+ goto err_disable_1v8;
+ }
+ }
+
+ return 0;
+
+err_disable_1v8:
+ if (!IS_ERR(port->vpcie1v8))
+ regulator_disable(port->vpcie1v8);
+err_disable_3v3:
+ if (!IS_ERR(port->vpcie3v3))
+ regulator_disable(port->vpcie3v3);
+err_out:
+ return err;
+}
+
+static void rockchip_pcie_enable_interrupts(struct rockchip_pcie_port *port)
+{
+ pcie_write(port, (PCIE_CLIENT_INT_CLI << 16) &
+ (~PCIE_CLIENT_INT_CLI), PCIE_CLIENT_INT_MASK);
+ pcie_write(port, (u32)(~PCIE_CORE_INT), PCIE_CORE_INT_MASK);
+
+ rockchip_pcie_enable_bw_int(port);
+}
+
+static int rockchip_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops intx_domain_ops = {
+ .map = rockchip_pcie_intx_map,
+};
+
+static int rockchip_pcie_init_irq_domain(struct rockchip_pcie_port *pp)
+{
+ struct device *dev = pp->dev;
+ struct device_node *intc = of_get_next_child(dev->of_node, NULL);
+
+ if (!intc) {
+ dev_err(dev, "Missing child interrupt-controller node\n");
+ return -EINVAL;
+ }
+
+ pp->irq_domain = irq_domain_add_linear(intc, 4, &intx_domain_ops, pp);
+ if (!pp->irq_domain) {
+ dev_err(dev, "Failed to get a INTx IRQ domain\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rockchip_pcie_prog_ob_atu(struct rockchip_pcie_port *pp,
+ int region_no,
+ int type, u8 num_pass_bits,
+ u32 lower_addr, u32 upper_addr)
+{
+ u32 ob_addr_0;
+ u32 ob_addr_1;
+ u32 ob_desc_0;
+ void __iomem *aw_base;
+
+ if (region_no >= MAX_AXI_WRAPPER_REGION_NUM)
+ return -EINVAL;
+ if ((num_pass_bits + 1) < 8)
+ return -EINVAL;
+ if (num_pass_bits > 63)
+ return -EINVAL;
+ if (region_no == 0) {
+ if (AXI_REGION_0_SIZE < (2ULL << num_pass_bits))
+ return -EINVAL;
+ }
+ if (region_no != 0) {
+ if (AXI_REGION_SIZE < (2ULL << num_pass_bits))
+ return -EINVAL;
+ }
+ aw_base = pp->apb_base + PCIE_CORE_AXI_CONF_BASE;
+ aw_base += (region_no << OB_REG_SIZE_SHIFT);
+
+ ob_addr_0 = num_pass_bits & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS;
+ ob_addr_0 |= lower_addr & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR;
+ ob_addr_1 = upper_addr;
+ ob_desc_0 = (1 << 23 | type);
+
+ writel(ob_addr_0, aw_base);
+ writel(ob_addr_1, aw_base + PCIE_CORE_OB_REGION_ADDR1);
+ writel(ob_desc_0, aw_base + PCIE_CORE_OB_REGION_DESC0);
+ writel(0, aw_base + PCIE_CORE_OB_REGION_DESC1);
+
+ return 0;
+}
+
+static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie_port *pp,
+ int region_no,
+ u8 num_pass_bits,
+ u32 lower_addr,
+ u32 upper_addr)
+{
+ u32 ib_addr_0;
+ u32 ib_addr_1;
+ void __iomem *aw_base;
+
+ if (!pp)
+ return -EINVAL;
+ if (region_no > MAX_AXI_IB_ROOTPORT_REGION_NUM)
+ return -EINVAL;
+ if ((num_pass_bits + 1) < MIN_AXI_ADDR_BITS_PASSED)
+ return -EINVAL;
+ if (num_pass_bits > 63)
+ return -EINVAL;
+ aw_base = pp->apb_base + PCIE_CORE_AXI_INBOUND_BASE;
+ aw_base += (region_no << IB_ROOT_PORT_REG_SIZE_SHIFT);
+
+ ib_addr_0 = num_pass_bits & PCIE_CORE_IB_REGION_ADDR0_NUM_BITS;
+ ib_addr_0 |= (lower_addr << 8) & PCIE_CORE_IB_REGION_ADDR0_LO_ADDR;
+ ib_addr_1 = upper_addr;
+
+ writel(ib_addr_0, aw_base);
+ writel(ib_addr_1, aw_base + PCIE_RP_IB_ADDR_TRANS);
+
+ return 0;
+}
+
+static int rockchip_pcie_probe(struct platform_device *pdev)
+{
+ struct rockchip_pcie_port *port;
+ struct device *dev = &pdev->dev;
+ struct pci_bus *bus, *child;
+ struct resource_entry *win;
+ resource_size_t io_base;
+ struct resource *busn;
+ struct resource *mem;
+ struct resource *io;
+ phys_addr_t io_bus_addr;
+ u32 io_size;
+ phys_addr_t mem_bus_addr;
+ u32 mem_size;
+ int reg_no;
+ int err;
+ int offset;
+
+ LIST_HEAD(res);
+
+ if (!dev->of_node)
+ return -ENODEV;
+
+ port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return -ENOMEM;
+
+ port->dev = dev;
+
+ err = rockchip_pcie_parse_dt(port);
+ if (err)
+ return err;
+
+ err = clk_prepare_enable(port->aclk_pcie);
+ if (err) {
+ dev_err(dev, "Unable to enable aclk_pcie clock.\n");
+ goto err_aclk_pcie;
+ }
+
+ err = clk_prepare_enable(port->aclk_perf_pcie);
+ if (err) {
+ dev_err(dev, "Unable to enable aclk_perf_pcie clock.\n");
+ goto err_aclk_perf_pcie;
+ }
+
+ err = clk_prepare_enable(port->hclk_pcie);
+ if (err) {
+ dev_err(dev, "Unable to enable hclk_pcie clock.\n");
+ goto err_hclk_pcie;
+ }
+
+ err = clk_prepare_enable(port->clk_pcie_pm);
+ if (err) {
+ dev_err(dev, "Unable to enable hclk_pcie clock.\n");
+ goto err_pcie_pm;
+ }
+
+ err = rockchip_pcie_set_vpcie(port);
+ if (err) {
+ dev_err(port->dev, "Fail to set vpcie regulator.\n");
+ goto err_set_vpcie;
+ }
+
+ err = rockchip_pcie_init_port(port);
+ if (err)
+ goto err_vpcie;
+
+ platform_set_drvdata(pdev, port);
+
+ rockchip_pcie_enable_interrupts(port);
+
+ err = rockchip_pcie_init_irq_domain(port);
+ if (err < 0)
+ goto err_vpcie;
+
+ err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
+ &res, &io_base);
+ if (err)
+ goto err_vpcie;
+
+ err = devm_request_pci_bus_resources(dev, &res);
+ if (err)
+ goto err_vpcie;
+
+ /* Get the I/O and memory ranges from DT */
+ resource_list_for_each_entry(win, &res) {
+ switch (resource_type(win->res)) {
+ case IORESOURCE_IO:
+ io = win->res;
+ io->name = "I/O";
+ io_size = resource_size(io);
+ io_bus_addr = io->start - win->offset;
+ err = pci_remap_iospace(io, io_base);
+ if (err) {
+ dev_warn(port->dev, "error %d: failed to map resource %pR\n",
+ err, io);
+ continue;
+ }
+ break;
+ case IORESOURCE_MEM:
+ mem = win->res;
+ mem->name = "MEM";
+ mem_size = resource_size(mem);
+ mem_bus_addr = mem->start - win->offset;
+ break;
+ case IORESOURCE_BUS:
+ busn = win->res;
+ break;
+ default:
+ continue;
+ }
+ }
+
+ if (mem_size)
+ for (reg_no = 0; reg_no < (mem_size >> 20); reg_no++) {
+ err = rockchip_pcie_prog_ob_atu(port, reg_no + 1,
+ AXI_WRAPPER_MEM_WRITE,
+ 20 - 1,
+ mem_bus_addr +
+ (reg_no << 20),
+ 0);
+ if (err) {
+ dev_err(dev, "Program RC mem outbound ATU failed\n");
+ goto err_vpcie;
+ }
+ }
+
+ err = rockchip_pcie_prog_ib_atu(port, 2, 32 - 1, 0x0, 0);
+ if (err) {
+ dev_err(dev, "Program RC mem inbound ATU failed\n");
+ goto err_vpcie;
+ }
+
+ offset = mem_size >> 20;
+
+ if (io_size)
+ for (reg_no = 0; reg_no < (io_size >> 20); reg_no++) {
+ err = rockchip_pcie_prog_ob_atu(port,
+ reg_no + 1 + offset,
+ AXI_WRAPPER_IO_WRITE,
+ 20 - 1,
+ io_bus_addr +
+ (reg_no << 20),
+ 0);
+ if (err) {
+ dev_err(dev, "Program RC io outbound ATU failed\n");
+ goto err_vpcie;
+ }
+ }
+
+ if (busn)
+ port->root_bus_nr = busn->start;
+
+ bus = pci_scan_root_bus(&pdev->dev, 0,
+ &rockchip_pcie_ops, port, &res);
+
+ if (!bus) {
+ err = -ENOMEM;
+ goto err_vpcie;
+ }
+
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+
+ pci_bus_add_devices(bus);
+
+ dev_warn(dev, "only 32-bit config accesses supported; smaller writes may corrupt adjacent RW1C fields\n");
+
+ return err;
+
+err_vpcie:
+ if (!IS_ERR(port->vpcie3v3))
+ regulator_disable(port->vpcie3v3);
+ if (!IS_ERR(port->vpcie1v8))
+ regulator_disable(port->vpcie1v8);
+ if (!IS_ERR(port->vpcie0v9))
+ regulator_disable(port->vpcie0v9);
+err_set_vpcie:
+ clk_disable_unprepare(port->clk_pcie_pm);
+err_pcie_pm:
+ clk_disable_unprepare(port->hclk_pcie);
+err_hclk_pcie:
+ clk_disable_unprepare(port->aclk_perf_pcie);
+err_aclk_perf_pcie:
+ clk_disable_unprepare(port->aclk_pcie);
+err_aclk_pcie:
+ return err;
+}
+
+static const struct of_device_id rockchip_pcie_of_match[] = {
+ { .compatible = "rockchip,rk3399-pcie", },
+ {}
+};
+
+static struct platform_driver rockchip_pcie_driver = {
+ .driver = {
+ .name = "rockchip-pcie",
+ .of_match_table = rockchip_pcie_of_match,
+ },
+ .probe = rockchip_pcie_probe,
+
+};
+builtin_platform_driver(rockchip_pcie_driver);
+
--
2.3.7
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