--- /dev/null
- err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
- &res, &io_base);
+ // SPDX-License-Identifier: GPL-2.0+
+ /*
+ * Rockchip AXI PCIe host controller driver
+ *
+ * Copyright (c) 2016 Rockchip, Inc.
+ *
+ * Author: Shawn Lin <shawn.lin@rock-chips.com>
+ * Wenrui Li <wenrui.li@rock-chips.com>
+ *
+ * Bits taken from Synopsys DesignWare Host controller driver and
+ * ARM PCI Host generic driver.
+ */
+
+ #include <linux/bitrev.h>
+ #include <linux/clk.h>
+ #include <linux/delay.h>
+ #include <linux/gpio/consumer.h>
+ #include <linux/init.h>
+ #include <linux/interrupt.h>
+ #include <linux/iopoll.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/module.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>
+
++#include "../pci.h"
+ #include "pcie-rockchip.h"
+
+ static void rockchip_pcie_enable_bw_int(struct rockchip_pcie *rockchip)
+ {
+ u32 status;
+
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+ status |= (PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+ }
+
+ static void rockchip_pcie_clr_bw_int(struct rockchip_pcie *rockchip)
+ {
+ u32 status;
+
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+ status |= (PCI_EXP_LNKSTA_LBMS | PCI_EXP_LNKSTA_LABS) << 16;
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+ }
+
+ static void rockchip_pcie_update_txcredit_mui(struct rockchip_pcie *rockchip)
+ {
+ u32 val;
+
+ /* Update Tx credit maximum update interval */
+ val = rockchip_pcie_read(rockchip, PCIE_CORE_TXCREDIT_CFG1);
+ val &= ~PCIE_CORE_TXCREDIT_CFG1_MUI_MASK;
+ val |= PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(24000); /* ns */
+ rockchip_pcie_write(rockchip, val, PCIE_CORE_TXCREDIT_CFG1);
+ }
+
+ static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
+ struct pci_bus *bus, int dev)
+ {
+ /* access only one slot on each root port */
+ if (bus->number == rockchip->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 == rockchip->root_bus_nr && dev > 0)
+ return 0;
+
+ return 1;
+ }
+
+ static u8 rockchip_pcie_lane_map(struct rockchip_pcie *rockchip)
+ {
+ u32 val;
+ u8 map;
+
+ if (rockchip->legacy_phy)
+ return GENMASK(MAX_LANE_NUM - 1, 0);
+
+ val = rockchip_pcie_read(rockchip, PCIE_CORE_LANE_MAP);
+ map = val & PCIE_CORE_LANE_MAP_MASK;
+
+ /* The link may be using a reverse-indexed mapping. */
+ if (val & PCIE_CORE_LANE_MAP_REVERSE)
+ map = bitrev8(map) >> 4;
+
+ return map;
+ }
+
+ static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
+ int where, int size, u32 *val)
+ {
+ void __iomem *addr;
+
+ addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_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 *rockchip,
+ int where, int size, u32 val)
+ {
+ u32 mask, tmp, offset;
+ void __iomem *addr;
+
+ offset = where & ~0x3;
+ addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + offset;
+
+ if (size == 4) {
+ writel(val, addr);
+ return PCIBIOS_SUCCESSFUL;
+ }
+
+ mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
+
+ /*
+ * N.B. This read/modify/write isn't safe in general because it can
+ * corrupt RW1C bits in adjacent registers. But the hardware
+ * doesn't support smaller writes.
+ */
+ tmp = readl(addr) & mask;
+ tmp |= val << ((where & 0x3) * 8);
+ writel(tmp, addr);
+
+ return PCIBIOS_SUCCESSFUL;
+ }
+
+ static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
+ 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 (bus->parent->number == rockchip->root_bus_nr)
+ rockchip_pcie_cfg_configuration_accesses(rockchip,
+ AXI_WRAPPER_TYPE0_CFG);
+ else
+ rockchip_pcie_cfg_configuration_accesses(rockchip,
+ AXI_WRAPPER_TYPE1_CFG);
+
+ if (size == 4) {
+ *val = readl(rockchip->reg_base + busdev);
+ } else if (size == 2) {
+ *val = readw(rockchip->reg_base + busdev);
+ } else if (size == 1) {
+ *val = readb(rockchip->reg_base + busdev);
+ } else {
+ *val = 0;
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+ return PCIBIOS_SUCCESSFUL;
+ }
+
+ static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
+ 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 (bus->parent->number == rockchip->root_bus_nr)
+ rockchip_pcie_cfg_configuration_accesses(rockchip,
+ AXI_WRAPPER_TYPE0_CFG);
+ else
+ rockchip_pcie_cfg_configuration_accesses(rockchip,
+ AXI_WRAPPER_TYPE1_CFG);
+
+ if (size == 4)
+ writel(val, rockchip->reg_base + busdev);
+ else if (size == 2)
+ writew(val, rockchip->reg_base + busdev);
+ else if (size == 1)
+ writeb(val, rockchip->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 *rockchip = bus->sysdata;
+
+ if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
+ *val = 0xffffffff;
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
+ if (bus->number == rockchip->root_bus_nr)
+ return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
+
+ return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size,
+ val);
+ }
+
+ static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
+ int where, int size, u32 val)
+ {
+ struct rockchip_pcie *rockchip = bus->sysdata;
+
+ if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (bus->number == rockchip->root_bus_nr)
+ return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
+
+ return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size,
+ val);
+ }
+
+ static struct pci_ops rockchip_pcie_ops = {
+ .read = rockchip_pcie_rd_conf,
+ .write = rockchip_pcie_wr_conf,
+ };
+
+ static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
+ {
+ int curr;
+ u32 status, scale, power;
+
+ if (IS_ERR(rockchip->vpcie3v3))
+ return;
+
+ /*
+ * Set RC's captured slot power limit and scale if
+ * vpcie3v3 available. The default values are both zero
+ * which means the software should set these two according
+ * to the actual power supply.
+ */
+ curr = regulator_get_current_limit(rockchip->vpcie3v3);
+ if (curr <= 0)
+ return;
+
+ scale = 3; /* 0.001x */
+ curr = curr / 1000; /* convert to mA */
+ power = (curr * 3300) / 1000; /* milliwatt */
+ while (power > PCIE_RC_CONFIG_DCR_CSPL_LIMIT) {
+ if (!scale) {
+ dev_warn(rockchip->dev, "invalid power supply\n");
+ return;
+ }
+ scale--;
+ power = power / 10;
+ }
+
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCR);
+ status |= (power << PCIE_RC_CONFIG_DCR_CSPL_SHIFT) |
+ (scale << PCIE_RC_CONFIG_DCR_CPLS_SHIFT);
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCR);
+ }
+
+ /**
+ * rockchip_pcie_host_init_port - Initialize hardware
+ * @rockchip: PCIe port information
+ */
+ static int rockchip_pcie_host_init_port(struct rockchip_pcie *rockchip)
+ {
+ struct device *dev = rockchip->dev;
+ int err, i = MAX_LANE_NUM;
+ u32 status;
+
+ gpiod_set_value_cansleep(rockchip->ep_gpio, 0);
+
+ err = rockchip_pcie_init_port(rockchip);
+ if (err)
+ return err;
+
+ /* Fix the transmitted FTS count desired to exit from L0s. */
+ status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL_PLC1);
+ status = (status & ~PCIE_CORE_CTRL_PLC1_FTS_MASK) |
+ (PCIE_CORE_CTRL_PLC1_FTS_CNT << PCIE_CORE_CTRL_PLC1_FTS_SHIFT);
+ rockchip_pcie_write(rockchip, status, PCIE_CORE_CTRL_PLC1);
+
+ rockchip_pcie_set_power_limit(rockchip);
+
+ /* Set RC's clock architecture as common clock */
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+ status |= PCI_EXP_LNKSTA_SLC << 16;
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+
+ /* Set RC's RCB to 128 */
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+ status |= PCI_EXP_LNKCTL_RCB;
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+
+ /* Enable Gen1 training */
+ rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
+ PCIE_CLIENT_CONFIG);
+
+ gpiod_set_value_cansleep(rockchip->ep_gpio, 1);
+
+ /* 500ms timeout value should be enough for Gen1/2 training */
+ err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_BASIC_STATUS1,
+ status, PCIE_LINK_UP(status), 20,
+ 500 * USEC_PER_MSEC);
+ if (err) {
+ dev_err(dev, "PCIe link training gen1 timeout!\n");
+ goto err_power_off_phy;
+ }
+
+ if (rockchip->link_gen == 2) {
+ /*
+ * Enable retrain for gen2. This should be configured only after
+ * gen1 finished.
+ */
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
+ status |= PCI_EXP_LNKCTL_RL;
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
+
+ err = readl_poll_timeout(rockchip->apb_base + PCIE_CORE_CTRL,
+ status, PCIE_LINK_IS_GEN2(status), 20,
+ 500 * USEC_PER_MSEC);
+ if (err)
+ dev_dbg(dev, "PCIe link training gen2 timeout, fall back to gen1!\n");
+ }
+
+ /* Check the final link width from negotiated lane counter from MGMT */
+ status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
+ status = 0x1 << ((status & PCIE_CORE_PL_CONF_LANE_MASK) >>
+ PCIE_CORE_PL_CONF_LANE_SHIFT);
+ dev_dbg(dev, "current link width is x%d\n", status);
+
+ /* Power off unused lane(s) */
+ rockchip->lanes_map = rockchip_pcie_lane_map(rockchip);
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ if (!(rockchip->lanes_map & BIT(i))) {
+ dev_dbg(dev, "idling lane %d\n", i);
+ phy_power_off(rockchip->phys[i]);
+ }
+ }
+
+ rockchip_pcie_write(rockchip, ROCKCHIP_VENDOR_ID,
+ PCIE_CORE_CONFIG_VENDOR);
+ rockchip_pcie_write(rockchip,
+ PCI_CLASS_BRIDGE_PCI << PCIE_RC_CONFIG_SCC_SHIFT,
+ PCIE_RC_CONFIG_RID_CCR);
+
+ /* Clear THP cap's next cap pointer to remove L1 substate cap */
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_THP_CAP);
+ status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK;
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_THP_CAP);
+
+ /* Clear L0s from RC's link cap */
+ if (of_property_read_bool(dev->of_node, "aspm-no-l0s")) {
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LINK_CAP);
+ status &= ~PCIE_RC_CONFIG_LINK_CAP_L0S;
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LINK_CAP);
+ }
+
+ status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCSR);
+ status &= ~PCIE_RC_CONFIG_DCSR_MPS_MASK;
+ status |= PCIE_RC_CONFIG_DCSR_MPS_256;
+ rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR);
+
+ return 0;
+ err_power_off_phy:
+ while (i--)
+ phy_power_off(rockchip->phys[i]);
+ i = MAX_LANE_NUM;
+ while (i--)
+ phy_exit(rockchip->phys[i]);
+ return err;
+ }
+
+ static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
+ {
+ struct rockchip_pcie *rockchip = arg;
+ struct device *dev = rockchip->dev;
+ u32 reg;
+ u32 sub_reg;
+
+ reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
+ if (reg & PCIE_CLIENT_INT_LOCAL) {
+ dev_dbg(dev, "local interrupt received\n");
+ sub_reg = rockchip_pcie_read(rockchip, PCIE_CORE_INT_STATUS);
+ if (sub_reg & PCIE_CORE_INT_PRFPE)
+ dev_dbg(dev, "parity error detected while reading from the PNP receive FIFO RAM\n");
+
+ if (sub_reg & PCIE_CORE_INT_CRFPE)
+ dev_dbg(dev, "parity error detected while reading from the Completion Receive FIFO RAM\n");
+
+ if (sub_reg & PCIE_CORE_INT_RRPE)
+ dev_dbg(dev, "parity error detected while reading from replay buffer RAM\n");
+
+ if (sub_reg & PCIE_CORE_INT_PRFO)
+ dev_dbg(dev, "overflow occurred in the PNP receive FIFO\n");
+
+ if (sub_reg & PCIE_CORE_INT_CRFO)
+ dev_dbg(dev, "overflow occurred in the completion receive FIFO\n");
+
+ if (sub_reg & PCIE_CORE_INT_RT)
+ dev_dbg(dev, "replay timer timed out\n");
+
+ if (sub_reg & PCIE_CORE_INT_RTR)
+ dev_dbg(dev, "replay timer rolled over after 4 transmissions of the same TLP\n");
+
+ if (sub_reg & PCIE_CORE_INT_PE)
+ dev_dbg(dev, "phy error detected on receive side\n");
+
+ if (sub_reg & PCIE_CORE_INT_MTR)
+ dev_dbg(dev, "malformed TLP received from the link\n");
+
+ if (sub_reg & PCIE_CORE_INT_UCR)
+ dev_dbg(dev, "malformed TLP received from the link\n");
+
+ if (sub_reg & PCIE_CORE_INT_FCE)
+ dev_dbg(dev, "an error was observed in the flow control advertisements from the other side\n");
+
+ if (sub_reg & PCIE_CORE_INT_CT)
+ dev_dbg(dev, "a request timed out waiting for completion\n");
+
+ if (sub_reg & PCIE_CORE_INT_UTC)
+ dev_dbg(dev, "unmapped TC error\n");
+
+ if (sub_reg & PCIE_CORE_INT_MMVC)
+ dev_dbg(dev, "MSI mask register changes\n");
+
+ rockchip_pcie_write(rockchip, sub_reg, PCIE_CORE_INT_STATUS);
+ } else if (reg & PCIE_CLIENT_INT_PHY) {
+ dev_dbg(dev, "phy link changes\n");
+ rockchip_pcie_update_txcredit_mui(rockchip);
+ rockchip_pcie_clr_bw_int(rockchip);
+ }
+
+ rockchip_pcie_write(rockchip, 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 *rockchip = arg;
+ struct device *dev = rockchip->dev;
+ u32 reg;
+
+ reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
+ if (reg & PCIE_CLIENT_INT_LEGACY_DONE)
+ dev_dbg(dev, "legacy done interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_MSG)
+ dev_dbg(dev, "message done interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_HOT_RST)
+ dev_dbg(dev, "hot reset interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_DPA)
+ dev_dbg(dev, "dpa interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_FATAL_ERR)
+ dev_dbg(dev, "fatal error interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_NFATAL_ERR)
+ dev_dbg(dev, "no fatal error interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_CORR_ERR)
+ dev_dbg(dev, "correctable error interrupt received\n");
+
+ if (reg & PCIE_CLIENT_INT_PHY)
+ dev_dbg(dev, "phy interrupt received\n");
+
+ rockchip_pcie_write(rockchip, 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_PHY),
+ PCIE_CLIENT_INT_STATUS);
+
+ 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 *rockchip = irq_desc_get_handler_data(desc);
+ struct device *dev = rockchip->dev;
+ u32 reg;
+ u32 hwirq;
+ u32 virq;
+
+ chained_irq_enter(chip, desc);
+
+ reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
+ reg = (reg & PCIE_CLIENT_INTR_MASK) >> PCIE_CLIENT_INTR_SHIFT;
+
+ while (reg) {
+ hwirq = ffs(reg) - 1;
+ reg &= ~BIT(hwirq);
+
+ virq = irq_find_mapping(rockchip->irq_domain, hwirq);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_err(dev, "unexpected IRQ, INT%d\n", hwirq);
+ }
+
+ chained_irq_exit(chip, desc);
+ }
+
+ static int rockchip_pcie_setup_irq(struct rockchip_pcie *rockchip)
+ {
+ int irq, err;
+ struct device *dev = rockchip->dev;
+ struct platform_device *pdev = to_platform_device(dev);
+
+ irq = platform_get_irq_byname(pdev, "sys");
+ if (irq < 0) {
+ dev_err(dev, "missing sys IRQ resource\n");
+ return irq;
+ }
+
+ err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
+ IRQF_SHARED, "pcie-sys", rockchip);
+ 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 irq;
+ }
+
+ irq_set_chained_handler_and_data(irq,
+ rockchip_pcie_legacy_int_handler,
+ rockchip);
+
+ irq = platform_get_irq_byname(pdev, "client");
+ if (irq < 0) {
+ dev_err(dev, "missing client IRQ resource\n");
+ return irq;
+ }
+
+ err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
+ IRQF_SHARED, "pcie-client", rockchip);
+ if (err) {
+ dev_err(dev, "failed to request PCIe client IRQ\n");
+ return err;
+ }
+
+ return 0;
+ }
+
+ /**
+ * rockchip_pcie_parse_host_dt - Parse Device Tree
+ * @rockchip: PCIe port information
+ *
+ * Return: '0' on success and error value on failure
+ */
+ static int rockchip_pcie_parse_host_dt(struct rockchip_pcie *rockchip)
+ {
+ struct device *dev = rockchip->dev;
+ int err;
+
+ err = rockchip_pcie_parse_dt(rockchip);
+ if (err)
+ return err;
+
+ err = rockchip_pcie_setup_irq(rockchip);
+ if (err)
+ return err;
+
+ rockchip->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v");
+ if (IS_ERR(rockchip->vpcie12v)) {
+ if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no vpcie12v regulator found\n");
+ }
+
+ rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
+ if (IS_ERR(rockchip->vpcie3v3)) {
+ if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no vpcie3v3 regulator found\n");
+ }
+
+ rockchip->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8");
+ if (IS_ERR(rockchip->vpcie1v8)) {
+ if (PTR_ERR(rockchip->vpcie1v8) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no vpcie1v8 regulator found\n");
+ }
+
+ rockchip->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9");
+ if (IS_ERR(rockchip->vpcie0v9)) {
+ if (PTR_ERR(rockchip->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 *rockchip)
+ {
+ struct device *dev = rockchip->dev;
+ int err;
+
+ if (!IS_ERR(rockchip->vpcie12v)) {
+ err = regulator_enable(rockchip->vpcie12v);
+ if (err) {
+ dev_err(dev, "fail to enable vpcie12v regulator\n");
+ goto err_out;
+ }
+ }
+
+ if (!IS_ERR(rockchip->vpcie3v3)) {
+ err = regulator_enable(rockchip->vpcie3v3);
+ if (err) {
+ dev_err(dev, "fail to enable vpcie3v3 regulator\n");
+ goto err_disable_12v;
+ }
+ }
+
+ if (!IS_ERR(rockchip->vpcie1v8)) {
+ err = regulator_enable(rockchip->vpcie1v8);
+ if (err) {
+ dev_err(dev, "fail to enable vpcie1v8 regulator\n");
+ goto err_disable_3v3;
+ }
+ }
+
+ if (!IS_ERR(rockchip->vpcie0v9)) {
+ err = regulator_enable(rockchip->vpcie0v9);
+ if (err) {
+ dev_err(dev, "fail to enable vpcie0v9 regulator\n");
+ goto err_disable_1v8;
+ }
+ }
+
+ return 0;
+
+ err_disable_1v8:
+ if (!IS_ERR(rockchip->vpcie1v8))
+ regulator_disable(rockchip->vpcie1v8);
+ err_disable_3v3:
+ if (!IS_ERR(rockchip->vpcie3v3))
+ regulator_disable(rockchip->vpcie3v3);
+ err_disable_12v:
+ if (!IS_ERR(rockchip->vpcie12v))
+ regulator_disable(rockchip->vpcie12v);
+ err_out:
+ return err;
+ }
+
+ static void rockchip_pcie_enable_interrupts(struct rockchip_pcie *rockchip)
+ {
+ rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) &
+ (~PCIE_CLIENT_INT_CLI), PCIE_CLIENT_INT_MASK);
+ rockchip_pcie_write(rockchip, (u32)(~PCIE_CORE_INT),
+ PCIE_CORE_INT_MASK);
+
+ rockchip_pcie_enable_bw_int(rockchip);
+ }
+
+ 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 *rockchip)
+ {
+ struct device *dev = rockchip->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;
+ }
+
+ rockchip->irq_domain = irq_domain_add_linear(intc, PCI_NUM_INTX,
+ &intx_domain_ops, rockchip);
+ if (!rockchip->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 *rockchip,
+ 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;
+ u32 aw_offset;
+
+ 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_offset = (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);
+
+ rockchip_pcie_write(rockchip, ob_addr_0,
+ PCIE_CORE_OB_REGION_ADDR0 + aw_offset);
+ rockchip_pcie_write(rockchip, ob_addr_1,
+ PCIE_CORE_OB_REGION_ADDR1 + aw_offset);
+ rockchip_pcie_write(rockchip, ob_desc_0,
+ PCIE_CORE_OB_REGION_DESC0 + aw_offset);
+ rockchip_pcie_write(rockchip, 0,
+ PCIE_CORE_OB_REGION_DESC1 + aw_offset);
+
+ return 0;
+ }
+
+ static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
+ int region_no, u8 num_pass_bits,
+ u32 lower_addr, u32 upper_addr)
+ {
+ u32 ib_addr_0;
+ u32 ib_addr_1;
+ u32 aw_offset;
+
+ 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_offset = (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;
+
+ rockchip_pcie_write(rockchip, ib_addr_0, PCIE_RP_IB_ADDR0 + aw_offset);
+ rockchip_pcie_write(rockchip, ib_addr_1, PCIE_RP_IB_ADDR1 + aw_offset);
+
+ return 0;
+ }
+
+ static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
+ {
+ struct device *dev = rockchip->dev;
+ int offset;
+ int err;
+ int reg_no;
+
+ rockchip_pcie_cfg_configuration_accesses(rockchip,
+ AXI_WRAPPER_TYPE0_CFG);
+
+ for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
+ err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
+ AXI_WRAPPER_MEM_WRITE,
+ 20 - 1,
+ rockchip->mem_bus_addr +
+ (reg_no << 20),
+ 0);
+ if (err) {
+ dev_err(dev, "program RC mem outbound ATU failed\n");
+ return err;
+ }
+ }
+
+ err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
+ if (err) {
+ dev_err(dev, "program RC mem inbound ATU failed\n");
+ return err;
+ }
+
+ offset = rockchip->mem_size >> 20;
+ for (reg_no = 0; reg_no < (rockchip->io_size >> 20); reg_no++) {
+ err = rockchip_pcie_prog_ob_atu(rockchip,
+ reg_no + 1 + offset,
+ AXI_WRAPPER_IO_WRITE,
+ 20 - 1,
+ rockchip->io_bus_addr +
+ (reg_no << 20),
+ 0);
+ if (err) {
+ dev_err(dev, "program RC io outbound ATU failed\n");
+ return err;
+ }
+ }
+
+ /* assign message regions */
+ rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1 + offset,
+ AXI_WRAPPER_NOR_MSG,
+ 20 - 1, 0, 0);
+
+ rockchip->msg_bus_addr = rockchip->mem_bus_addr +
+ ((reg_no + offset) << 20);
+ return err;
+ }
+
+ static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip)
+ {
+ u32 value;
+ int err;
+
+ /* send PME_TURN_OFF message */
+ writel(0x0, rockchip->msg_region + PCIE_RC_SEND_PME_OFF);
+
+ /* read LTSSM and wait for falling into L2 link state */
+ err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_DEBUG_OUT_0,
+ value, PCIE_LINK_IS_L2(value), 20,
+ jiffies_to_usecs(5 * HZ));
+ if (err) {
+ dev_err(rockchip->dev, "PCIe link enter L2 timeout!\n");
+ return err;
+ }
+
+ return 0;
+ }
+
+ static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
+ {
+ struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
+ int ret;
+
+ /* disable core and cli int since we don't need to ack PME_ACK */
+ rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) |
+ PCIE_CLIENT_INT_CLI, PCIE_CLIENT_INT_MASK);
+ rockchip_pcie_write(rockchip, (u32)PCIE_CORE_INT, PCIE_CORE_INT_MASK);
+
+ ret = rockchip_pcie_wait_l2(rockchip);
+ if (ret) {
+ rockchip_pcie_enable_interrupts(rockchip);
+ return ret;
+ }
+
+ rockchip_pcie_deinit_phys(rockchip);
+
+ rockchip_pcie_disable_clocks(rockchip);
+
+ if (!IS_ERR(rockchip->vpcie0v9))
+ regulator_disable(rockchip->vpcie0v9);
+
+ return ret;
+ }
+
+ static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)
+ {
+ struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
+ int err;
+
+ if (!IS_ERR(rockchip->vpcie0v9)) {
+ err = regulator_enable(rockchip->vpcie0v9);
+ if (err) {
+ dev_err(dev, "fail to enable vpcie0v9 regulator\n");
+ return err;
+ }
+ }
+
+ err = rockchip_pcie_enable_clocks(rockchip);
+ if (err)
+ goto err_disable_0v9;
+
+ err = rockchip_pcie_host_init_port(rockchip);
+ if (err)
+ goto err_pcie_resume;
+
+ err = rockchip_pcie_cfg_atu(rockchip);
+ if (err)
+ goto err_err_deinit_port;
+
+ /* Need this to enter L1 again */
+ rockchip_pcie_update_txcredit_mui(rockchip);
+ rockchip_pcie_enable_interrupts(rockchip);
+
+ return 0;
+
+ err_err_deinit_port:
+ rockchip_pcie_deinit_phys(rockchip);
+ err_pcie_resume:
+ rockchip_pcie_disable_clocks(rockchip);
+ err_disable_0v9:
+ if (!IS_ERR(rockchip->vpcie0v9))
+ regulator_disable(rockchip->vpcie0v9);
+ return err;
+ }
+
+ static int rockchip_pcie_probe(struct platform_device *pdev)
+ {
+ struct rockchip_pcie *rockchip;
+ struct device *dev = &pdev->dev;
+ struct pci_bus *bus, *child;
+ struct pci_host_bridge *bridge;
+ struct resource_entry *win;
+ resource_size_t io_base;
+ struct resource *mem;
+ struct resource *io;
+ int err;
+
+ LIST_HEAD(res);
+
+ if (!dev->of_node)
+ return -ENODEV;
+
+ bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rockchip));
+ if (!bridge)
+ return -ENOMEM;
+
+ rockchip = pci_host_bridge_priv(bridge);
+
+ platform_set_drvdata(pdev, rockchip);
+ rockchip->dev = dev;
+ rockchip->is_rc = true;
+
+ err = rockchip_pcie_parse_host_dt(rockchip);
+ if (err)
+ return err;
+
+ err = rockchip_pcie_enable_clocks(rockchip);
+ if (err)
+ return err;
+
+ err = rockchip_pcie_set_vpcie(rockchip);
+ if (err) {
+ dev_err(dev, "failed to set vpcie regulator\n");
+ goto err_set_vpcie;
+ }
+
+ err = rockchip_pcie_host_init_port(rockchip);
+ if (err)
+ goto err_vpcie;
+
+ rockchip_pcie_enable_interrupts(rockchip);
+
+ err = rockchip_pcie_init_irq_domain(rockchip);
+ if (err < 0)
+ goto err_deinit_port;
+
++ err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
++ &res, &io_base);
+ if (err)
+ goto err_remove_irq_domain;
+
+ err = devm_request_pci_bus_resources(dev, &res);
+ if (err)
+ goto err_free_res;
+
+ /* 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";
+ rockchip->io_size = resource_size(io);
+ rockchip->io_bus_addr = io->start - win->offset;
+ err = pci_remap_iospace(io, io_base);
+ if (err) {
+ dev_warn(dev, "error %d: failed to map resource %pR\n",
+ err, io);
+ continue;
+ }
+ rockchip->io = io;
+ break;
+ case IORESOURCE_MEM:
+ mem = win->res;
+ mem->name = "MEM";
+ rockchip->mem_size = resource_size(mem);
+ rockchip->mem_bus_addr = mem->start - win->offset;
+ break;
+ case IORESOURCE_BUS:
+ rockchip->root_bus_nr = win->res->start;
+ break;
+ default:
+ continue;
+ }
+ }
+
+ err = rockchip_pcie_cfg_atu(rockchip);
+ if (err)
+ goto err_unmap_iospace;
+
+ rockchip->msg_region = devm_ioremap(dev, rockchip->msg_bus_addr, SZ_1M);
+ if (!rockchip->msg_region) {
+ err = -ENOMEM;
+ goto err_unmap_iospace;
+ }
+
+ list_splice_init(&res, &bridge->windows);
+ bridge->dev.parent = dev;
+ bridge->sysdata = rockchip;
+ bridge->busnr = 0;
+ bridge->ops = &rockchip_pcie_ops;
+ bridge->map_irq = of_irq_parse_and_map_pci;
+ bridge->swizzle_irq = pci_common_swizzle;
+
+ err = pci_scan_root_bus_bridge(bridge);
+ if (err < 0)
+ goto err_unmap_iospace;
+
+ bus = bridge->bus;
+
+ rockchip->root_bus = bus;
+
+ 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);
+ return 0;
+
+ err_unmap_iospace:
+ pci_unmap_iospace(rockchip->io);
+ err_free_res:
+ pci_free_resource_list(&res);
+ err_remove_irq_domain:
+ irq_domain_remove(rockchip->irq_domain);
+ err_deinit_port:
+ rockchip_pcie_deinit_phys(rockchip);
+ err_vpcie:
+ if (!IS_ERR(rockchip->vpcie12v))
+ regulator_disable(rockchip->vpcie12v);
+ if (!IS_ERR(rockchip->vpcie3v3))
+ regulator_disable(rockchip->vpcie3v3);
+ if (!IS_ERR(rockchip->vpcie1v8))
+ regulator_disable(rockchip->vpcie1v8);
+ if (!IS_ERR(rockchip->vpcie0v9))
+ regulator_disable(rockchip->vpcie0v9);
+ err_set_vpcie:
+ rockchip_pcie_disable_clocks(rockchip);
+ return err;
+ }
+
+ static int rockchip_pcie_remove(struct platform_device *pdev)
+ {
+ struct device *dev = &pdev->dev;
+ struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
+
+ pci_stop_root_bus(rockchip->root_bus);
+ pci_remove_root_bus(rockchip->root_bus);
+ pci_unmap_iospace(rockchip->io);
+ irq_domain_remove(rockchip->irq_domain);
+
+ rockchip_pcie_deinit_phys(rockchip);
+
+ rockchip_pcie_disable_clocks(rockchip);
+
+ if (!IS_ERR(rockchip->vpcie12v))
+ regulator_disable(rockchip->vpcie12v);
+ if (!IS_ERR(rockchip->vpcie3v3))
+ regulator_disable(rockchip->vpcie3v3);
+ if (!IS_ERR(rockchip->vpcie1v8))
+ regulator_disable(rockchip->vpcie1v8);
+ if (!IS_ERR(rockchip->vpcie0v9))
+ regulator_disable(rockchip->vpcie0v9);
+
+ return 0;
+ }
+
+ static const struct dev_pm_ops rockchip_pcie_pm_ops = {
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq,
+ rockchip_pcie_resume_noirq)
+ };
+
+ static const struct of_device_id rockchip_pcie_of_match[] = {
+ { .compatible = "rockchip,rk3399-pcie", },
+ {}
+ };
+ MODULE_DEVICE_TABLE(of, rockchip_pcie_of_match);
+
+ static struct platform_driver rockchip_pcie_driver = {
+ .driver = {
+ .name = "rockchip-pcie",
+ .of_match_table = rockchip_pcie_of_match,
+ .pm = &rockchip_pcie_pm_ops,
+ },
+ .probe = rockchip_pcie_probe,
+ .remove = rockchip_pcie_remove,
+ };
+ module_platform_driver(rockchip_pcie_driver);
+
+ MODULE_AUTHOR("Rockchip Inc");
+ MODULE_DESCRIPTION("Rockchip AXI PCIe driver");
+ MODULE_LICENSE("GPL v2");
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
- #include <linux/regmap.h>
+#include "../pci.h"
+ #include "pcie-rockchip.h"
- /*
- * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16
- * bits. This allows atomic updates of the register without locking.
- */
- #define HIWORD_UPDATE(mask, val) (((mask) << 16) | (val))
- #define HIWORD_UPDATE_BIT(val) HIWORD_UPDATE(val, val)
-
- #define ENCODE_LANES(x) ((((x) >> 1) & 3) << 4)
- #define MAX_LANE_NUM 4
-
- #define PCIE_CLIENT_BASE 0x0
- #define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
- #define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001)
- #define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002)
- #define PCIE_CLIENT_ARI_ENABLE HIWORD_UPDATE_BIT(0x0008)
- #define PCIE_CLIENT_CONF_LANE_NUM(x) HIWORD_UPDATE(0x0030, ENCODE_LANES(x))
- #define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040)
- #define PCIE_CLIENT_GEN_SEL_1 HIWORD_UPDATE(0x0080, 0)
- #define PCIE_CLIENT_GEN_SEL_2 HIWORD_UPDATE_BIT(0x0080)
- #define PCIE_CLIENT_DEBUG_OUT_0 (PCIE_CLIENT_BASE + 0x3c)
- #define PCIE_CLIENT_DEBUG_LTSSM_MASK GENMASK(5, 0)
- #define PCIE_CLIENT_DEBUG_LTSSM_L1 0x18
- #define PCIE_CLIENT_DEBUG_LTSSM_L2 0x19
- #define PCIE_CLIENT_BASIC_STATUS1 (PCIE_CLIENT_BASE + 0x48)
- #define PCIE_CLIENT_LINK_STATUS_UP 0x00300000
- #define PCIE_CLIENT_LINK_STATUS_MASK 0x00300000
- #define PCIE_CLIENT_INT_MASK (PCIE_CLIENT_BASE + 0x4c)
- #define PCIE_CLIENT_INT_STATUS (PCIE_CLIENT_BASE + 0x50)
- #define PCIE_CLIENT_INTR_MASK GENMASK(8, 5)
- #define PCIE_CLIENT_INTR_SHIFT 5
- #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_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)
-
- #define PCIE_CORE_CTRL_MGMT_BASE 0x900000
- #define PCIE_CORE_CTRL (PCIE_CORE_CTRL_MGMT_BASE + 0x000)
- #define PCIE_CORE_PL_CONF_SPEED_5G 0x00000008
- #define PCIE_CORE_PL_CONF_SPEED_MASK 0x00000018
- #define PCIE_CORE_PL_CONF_LANE_MASK 0x00000006
- #define PCIE_CORE_PL_CONF_LANE_SHIFT 1
- #define PCIE_CORE_CTRL_PLC1 (PCIE_CORE_CTRL_MGMT_BASE + 0x004)
- #define PCIE_CORE_CTRL_PLC1_FTS_MASK GENMASK(23, 8)
- #define PCIE_CORE_CTRL_PLC1_FTS_SHIFT 8
- #define PCIE_CORE_CTRL_PLC1_FTS_CNT 0xffff
- #define PCIE_CORE_TXCREDIT_CFG1 (PCIE_CORE_CTRL_MGMT_BASE + 0x020)
- #define PCIE_CORE_TXCREDIT_CFG1_MUI_MASK 0xFFFF0000
- #define PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT 16
- #define PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(x) \
- (((x) >> 3) << PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT)
- #define PCIE_CORE_LANE_MAP (PCIE_CORE_CTRL_MGMT_BASE + 0x200)
- #define PCIE_CORE_LANE_MAP_MASK 0x0000000f
- #define PCIE_CORE_LANE_MAP_REVERSE BIT(16)
- #define PCIE_CORE_INT_STATUS (PCIE_CORE_CTRL_MGMT_BASE + 0x20c)
- #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)
- #define PCIE_CORE_CONFIG_VENDOR (PCIE_CORE_CTRL_MGMT_BASE + 0x44)
- #define PCIE_CORE_INT_MASK (PCIE_CORE_CTRL_MGMT_BASE + 0x210)
- #define PCIE_RC_BAR_CONF (PCIE_CORE_CTRL_MGMT_BASE + 0x300)
-
- #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_RC_CONFIG_NORMAL_BASE 0x800000
- #define PCIE_RC_CONFIG_BASE 0xa00000
- #define PCIE_RC_CONFIG_RID_CCR (PCIE_RC_CONFIG_BASE + 0x08)
- #define PCIE_RC_CONFIG_SCC_SHIFT 16
- #define PCIE_RC_CONFIG_DCR (PCIE_RC_CONFIG_BASE + 0xc4)
- #define PCIE_RC_CONFIG_DCR_CSPL_SHIFT 18
- #define PCIE_RC_CONFIG_DCR_CSPL_LIMIT 0xff
- #define PCIE_RC_CONFIG_DCR_CPLS_SHIFT 26
- #define PCIE_RC_CONFIG_DCSR (PCIE_RC_CONFIG_BASE + 0xc8)
- #define PCIE_RC_CONFIG_DCSR_MPS_MASK GENMASK(7, 5)
- #define PCIE_RC_CONFIG_DCSR_MPS_256 (0x1 << 5)
- #define PCIE_RC_CONFIG_LINK_CAP (PCIE_RC_CONFIG_BASE + 0xcc)
- #define PCIE_RC_CONFIG_LINK_CAP_L0S BIT(10)
- #define PCIE_RC_CONFIG_LCS (PCIE_RC_CONFIG_BASE + 0xd0)
- #define PCIE_RC_CONFIG_L1_SUBSTATE_CTRL2 (PCIE_RC_CONFIG_BASE + 0x90c)
- #define PCIE_RC_CONFIG_THP_CAP (PCIE_RC_CONFIG_BASE + 0x274)
- #define PCIE_RC_CONFIG_THP_CAP_NEXT_MASK GENMASK(31, 20)
-
- #define PCIE_CORE_AXI_CONF_BASE 0xc00000
- #define PCIE_CORE_OB_REGION_ADDR0 (PCIE_CORE_AXI_CONF_BASE + 0x0)
- #define PCIE_CORE_OB_REGION_ADDR0_NUM_BITS 0x3f
- #define PCIE_CORE_OB_REGION_ADDR0_LO_ADDR 0xffffff00
- #define PCIE_CORE_OB_REGION_ADDR1 (PCIE_CORE_AXI_CONF_BASE + 0x4)
- #define PCIE_CORE_OB_REGION_DESC0 (PCIE_CORE_AXI_CONF_BASE + 0x8)
- #define PCIE_CORE_OB_REGION_DESC1 (PCIE_CORE_AXI_CONF_BASE + 0xc)
-
- #define PCIE_CORE_AXI_INBOUND_BASE 0xc00800
- #define PCIE_RP_IB_ADDR0 (PCIE_CORE_AXI_INBOUND_BASE + 0x0)
- #define PCIE_CORE_IB_REGION_ADDR0_NUM_BITS 0x3f
- #define PCIE_CORE_IB_REGION_ADDR0_LO_ADDR 0xffffff00
- #define PCIE_RP_IB_ADDR1 (PCIE_CORE_AXI_INBOUND_BASE + 0x4)
-
- /* 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 AXI_WRAPPER_TYPE0_CFG 0xa
- #define AXI_WRAPPER_TYPE1_CFG 0xb
- #define AXI_WRAPPER_NOR_MSG 0xc
-
- #define MAX_AXI_IB_ROOTPORT_REGION_NUM 3
- #define MIN_AXI_ADDR_BITS_PASSED 8
- #define PCIE_RC_SEND_PME_OFF 0x11960
- #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))
- #define PCIE_LINK_IS_L2(x) \
- (((x) & PCIE_CLIENT_DEBUG_LTSSM_MASK) == PCIE_CLIENT_DEBUG_LTSSM_L2)
- #define PCIE_LINK_UP(x) \
- (((x) & PCIE_CLIENT_LINK_STATUS_MASK) == PCIE_CLIENT_LINK_STATUS_UP)
- #define PCIE_LINK_IS_GEN2(x) \
- (((x) & PCIE_CORE_PL_CONF_SPEED_MASK) == PCIE_CORE_PL_CONF_SPEED_5G)
-
- #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_0_TYPE_MASK GENMASK(3, 0)
- #define MAX_AXI_WRAPPER_REGION_NUM 33
-
- struct rockchip_pcie {
- void __iomem *reg_base; /* DT axi-base */
- void __iomem *apb_base; /* DT apb-base */
- bool legacy_phy;
- struct phy *phys[MAX_LANE_NUM];
- struct reset_control *core_rst;
- struct reset_control *mgmt_rst;
- struct reset_control *mgmt_sticky_rst;
- struct reset_control *pipe_rst;
- struct reset_control *pm_rst;
- struct reset_control *aclk_rst;
- struct reset_control *pclk_rst;
- struct clk *aclk_pcie;
- struct clk *aclk_perf_pcie;
- struct clk *hclk_pcie;
- struct clk *clk_pcie_pm;
- struct regulator *vpcie12v; /* 12V power supply */
- 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 lanes_map;
- u8 root_bus_nr;
- int link_gen;
- struct device *dev;
- struct irq_domain *irq_domain;
- int offset;
- struct pci_bus *root_bus;
- struct resource *io;
- phys_addr_t io_bus_addr;
- u32 io_size;
- void __iomem *msg_region;
- u32 mem_size;
- phys_addr_t msg_bus_addr;
- phys_addr_t mem_bus_addr;
- };
-
- static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
- {
- return readl(rockchip->apb_base + reg);
- }
-
- static void rockchip_pcie_write(struct rockchip_pcie *rockchip, u32 val,
- u32 reg)
- {
- writel(val, rockchip->apb_base + reg);
- }
-
- static void rockchip_pcie_enable_bw_int(struct rockchip_pcie *rockchip)
- {
- u32 status;
-
- status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
- status |= (PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
- rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
- }
-
- static void rockchip_pcie_clr_bw_int(struct rockchip_pcie *rockchip)
- {
- u32 status;
-
- status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
- status |= (PCI_EXP_LNKSTA_LBMS | PCI_EXP_LNKSTA_LABS) << 16;
- rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
- }
-
- static void rockchip_pcie_update_txcredit_mui(struct rockchip_pcie *rockchip)
- {
- u32 val;
-
- /* Update Tx credit maximum update interval */
- val = rockchip_pcie_read(rockchip, PCIE_CORE_TXCREDIT_CFG1);
- val &= ~PCIE_CORE_TXCREDIT_CFG1_MUI_MASK;
- val |= PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(24000); /* ns */
- rockchip_pcie_write(rockchip, val, PCIE_CORE_TXCREDIT_CFG1);
- }
-
- static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
- struct pci_bus *bus, int dev)
- {
- /* access only one slot on each root port */
- if (bus->number == rockchip->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 == rockchip->root_bus_nr && dev > 0)
- return 0;
-
- return 1;
- }
-
- static u8 rockchip_pcie_lane_map(struct rockchip_pcie *rockchip)
- {
- u32 val;
- u8 map;
-
- if (rockchip->legacy_phy)
- return GENMASK(MAX_LANE_NUM - 1, 0);
-
- val = rockchip_pcie_read(rockchip, PCIE_CORE_LANE_MAP);
- map = val & PCIE_CORE_LANE_MAP_MASK;
-
- /* The link may be using a reverse-indexed mapping. */
- if (val & PCIE_CORE_LANE_MAP_REVERSE)
- map = bitrev8(map) >> 4;
-
- return map;
- }
-
- static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
- int where, int size, u32 *val)
+ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
{
- void __iomem *addr;
-
- addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + where;
-
- if (!IS_ALIGNED((uintptr_t)addr, size)) {
- *val = 0;
- return PCIBIOS_BAD_REGISTER_NUMBER;
- }
+ struct device *dev = rockchip->dev;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct device_node *node = dev->of_node;
+ struct resource *regs;
+ int err;
- if (size == 4) {
- *val = readl(addr);
- } else if (size == 2) {
- *val = readw(addr);
- } else if (size == 1) {
- *val = readb(addr);
+ if (rockchip->is_rc) {
+ regs = platform_get_resource_byname(pdev,
+ IORESOURCE_MEM,
+ "axi-base");
+ rockchip->reg_base = devm_pci_remap_cfg_resource(dev, regs);
+ if (IS_ERR(rockchip->reg_base))
+ return PTR_ERR(rockchip->reg_base);
} else {
- *val = 0;
- return PCIBIOS_BAD_REGISTER_NUMBER;
+ rockchip->mem_res =
+ platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "mem-base");
+ if (!rockchip->mem_res)
+ return -EINVAL;
}
- return PCIBIOS_SUCCESSFUL;
- }
- static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
- int where, int size, u32 val)
- {
- u32 mask, tmp, offset;
- void __iomem *addr;
+ regs = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "apb-base");
+ rockchip->apb_base = devm_ioremap_resource(dev, regs);
+ if (IS_ERR(rockchip->apb_base))
+ return PTR_ERR(rockchip->apb_base);
- offset = where & ~0x3;
- addr = rockchip->apb_base + PCIE_RC_CONFIG_NORMAL_BASE + offset;
+ err = rockchip_pcie_get_phys(rockchip);
+ if (err)
+ return err;
- if (size == 4) {
- writel(val, addr);
- return PCIBIOS_SUCCESSFUL;
+ rockchip->lanes = 1;
+ err = of_property_read_u32(node, "num-lanes", &rockchip->lanes);
+ if (!err && (rockchip->lanes == 0 ||
+ rockchip->lanes == 3 ||
+ rockchip->lanes > 4)) {
+ dev_warn(dev, "invalid num-lanes, default to use one lane\n");
+ rockchip->lanes = 1;
}
- mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
-
- /*
- * N.B. This read/modify/write isn't safe in general because it can
- * corrupt RW1C bits in adjacent registers. But the hardware
- * doesn't support smaller writes.
- */
- tmp = readl(addr) & mask;
- tmp |= val << ((where & 0x3) * 8);
- writel(tmp, addr);
-
- return PCIBIOS_SUCCESSFUL;
- }
-
- static void rockchip_pcie_cfg_configuration_accesses(
- struct rockchip_pcie *rockchip, u32 type)
- {
- u32 ob_desc_0;
-
- /* Configuration Accesses for region 0 */
- rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
-
- rockchip_pcie_write(rockchip,
- (RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
- PCIE_CORE_OB_REGION_ADDR0);
- rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
- PCIE_CORE_OB_REGION_ADDR1);
- ob_desc_0 = rockchip_pcie_read(rockchip, PCIE_CORE_OB_REGION_DESC0);
- ob_desc_0 &= ~(RC_REGION_0_TYPE_MASK);
- ob_desc_0 |= (type | (0x1 << 23));
- rockchip_pcie_write(rockchip, ob_desc_0, PCIE_CORE_OB_REGION_DESC0);
- rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
- }
-
- static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
- 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);
+ rockchip->link_gen = of_pci_get_max_link_speed(node);
+ if (rockchip->link_gen < 0 || rockchip->link_gen > 2)
+ rockchip->link_gen = 2;
- if (!IS_ALIGNED(busdev, size)) {
- *val = 0;
- return PCIBIOS_BAD_REGISTER_NUMBER;
+ rockchip->core_rst = devm_reset_control_get_exclusive(dev, "core");
+ if (IS_ERR(rockchip->core_rst)) {
+ if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing core reset property in node\n");
+ return PTR_ERR(rockchip->core_rst);
}
- if (bus->parent->number == rockchip->root_bus_nr)
- rockchip_pcie_cfg_configuration_accesses(rockchip,
- AXI_WRAPPER_TYPE0_CFG);
- else
- rockchip_pcie_cfg_configuration_accesses(rockchip,
- AXI_WRAPPER_TYPE1_CFG);
-
- if (size == 4) {
- *val = readl(rockchip->reg_base + busdev);
- } else if (size == 2) {
- *val = readw(rockchip->reg_base + busdev);
- } else if (size == 1) {
- *val = readb(rockchip->reg_base + busdev);
- } else {
- *val = 0;
- return PCIBIOS_BAD_REGISTER_NUMBER;
+ rockchip->mgmt_rst = devm_reset_control_get_exclusive(dev, "mgmt");
+ if (IS_ERR(rockchip->mgmt_rst)) {
+ if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing mgmt reset property in node\n");
+ return PTR_ERR(rockchip->mgmt_rst);
}
- return PCIBIOS_SUCCESSFUL;
- }
-
- static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
- 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 (bus->parent->number == rockchip->root_bus_nr)
- rockchip_pcie_cfg_configuration_accesses(rockchip,
- AXI_WRAPPER_TYPE0_CFG);
- else
- rockchip_pcie_cfg_configuration_accesses(rockchip,
- AXI_WRAPPER_TYPE1_CFG);
-
- if (size == 4)
- writel(val, rockchip->reg_base + busdev);
- else if (size == 2)
- writew(val, rockchip->reg_base + busdev);
- else if (size == 1)
- writeb(val, rockchip->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 *rockchip = bus->sysdata;
-
- if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
- *val = 0xffffffff;
- return PCIBIOS_DEVICE_NOT_FOUND;
+ rockchip->mgmt_sticky_rst = devm_reset_control_get_exclusive(dev,
+ "mgmt-sticky");
+ if (IS_ERR(rockchip->mgmt_sticky_rst)) {
+ if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing mgmt-sticky reset property in node\n");
+ return PTR_ERR(rockchip->mgmt_sticky_rst);
}
- if (bus->number == rockchip->root_bus_nr)
- return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
-
- return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size, val);
- }
+ rockchip->pipe_rst = devm_reset_control_get_exclusive(dev, "pipe");
+ if (IS_ERR(rockchip->pipe_rst)) {
+ if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing pipe reset property in node\n");
+ return PTR_ERR(rockchip->pipe_rst);
+ }
- static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
- int where, int size, u32 val)
- {
- struct rockchip_pcie *rockchip = bus->sysdata;
+ rockchip->pm_rst = devm_reset_control_get_exclusive(dev, "pm");
+ if (IS_ERR(rockchip->pm_rst)) {
+ if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing pm reset property in node\n");
+ return PTR_ERR(rockchip->pm_rst);
+ }
- if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
- return PCIBIOS_DEVICE_NOT_FOUND;
+ rockchip->pclk_rst = devm_reset_control_get_exclusive(dev, "pclk");
+ if (IS_ERR(rockchip->pclk_rst)) {
+ if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing pclk reset property in node\n");
+ return PTR_ERR(rockchip->pclk_rst);
+ }
- if (bus->number == rockchip->root_bus_nr)
- return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
+ rockchip->aclk_rst = devm_reset_control_get_exclusive(dev, "aclk");
+ if (IS_ERR(rockchip->aclk_rst)) {
+ if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
+ dev_err(dev, "missing aclk reset property in node\n");
+ return PTR_ERR(rockchip->aclk_rst);
+ }
- return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size, val);
- }
+ if (rockchip->is_rc) {
+ rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
+ if (IS_ERR(rockchip->ep_gpio)) {
+ dev_err(dev, "missing ep-gpios property in node\n");
+ return PTR_ERR(rockchip->ep_gpio);
+ }
+ }
- static struct pci_ops rockchip_pcie_ops = {
- .read = rockchip_pcie_rd_conf,
- .write = rockchip_pcie_wr_conf,
- };
+ rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
+ if (IS_ERR(rockchip->aclk_pcie)) {
+ dev_err(dev, "aclk clock not found\n");
+ return PTR_ERR(rockchip->aclk_pcie);
+ }
- static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
- {
- int curr;
- u32 status, scale, power;
+ rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
+ if (IS_ERR(rockchip->aclk_perf_pcie)) {
+ dev_err(dev, "aclk_perf clock not found\n");
+ return PTR_ERR(rockchip->aclk_perf_pcie);
+ }
- if (IS_ERR(rockchip->vpcie3v3))
- return;
+ rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
+ if (IS_ERR(rockchip->hclk_pcie)) {
+ dev_err(dev, "hclk clock not found\n");
+ return PTR_ERR(rockchip->hclk_pcie);
+ }
- /*
- * Set RC's captured slot power limit and scale if
- * vpcie3v3 available. The default values are both zero
- * which means the software should set these two according
- * to the actual power supply.
- */
- curr = regulator_get_current_limit(rockchip->vpcie3v3);
- if (curr <= 0)
- return;
-
- scale = 3; /* 0.001x */
- curr = curr / 1000; /* convert to mA */
- power = (curr * 3300) / 1000; /* milliwatt */
- while (power > PCIE_RC_CONFIG_DCR_CSPL_LIMIT) {
- if (!scale) {
- dev_warn(rockchip->dev, "invalid power supply\n");
- return;
- }
- scale--;
- power = power / 10;
+ rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
+ if (IS_ERR(rockchip->clk_pcie_pm)) {
+ dev_err(dev, "pm clock not found\n");
+ return PTR_ERR(rockchip->clk_pcie_pm);
}
- status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCR);
- status |= (power << PCIE_RC_CONFIG_DCR_CSPL_SHIFT) |
- (scale << PCIE_RC_CONFIG_DCR_CPLS_SHIFT);
- rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCR);
+ return 0;
}
+ EXPORT_SYMBOL_GPL(rockchip_pcie_parse_dt);
- /**
- * rockchip_pcie_init_port - Initialize hardware
- * @rockchip: PCIe port information
- */
- static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
+ int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
{
struct device *dev = rockchip->dev;
int err, i;
projects / platform / kernel / linux-starfive.git / commitdiff