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https://mirrors.bfsu.edu.cn/git/linux.git
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Merge branch 'pci/controller/rockchip'
- Use dev_err_probe() in dw-rockchip probe error path so the failures aren't silent (Uwe Kleine-König) - Sleep PCIE_T_PVPERL_MS (100ms) before deasserting PERST# (Damien Le Moal) - Sleep PCIE_T_RRS_READY_MS (100ms) after conventional reset, before a config access (Damien Le Moal) - Request the PERST# GPIO with GPIOD_OUT_LOW so it matches the POR value, which avoids a spurious PERST# assertion and fixes a Qcom modem firmware crash and issues with WLAN controllers, e.g., RTL8822CE (Manivannan Sadhasivam for rockchip, Niklas Cassel for dw-rockchip) - Refactor dw-rockchip and add support for Endpoint mode for rk3568 and rk3588 (Niklas Cassel) * pci/controller/rockchip: PCI: dw-rockchip: Use pci_epc_init_notify() directly PCI: dw-rockchip: Add endpoint mode support PCI: dw-rockchip: Refactor the driver to prepare for EP mode PCI: dw-rockchip: Add rockchip_pcie_get_ltssm() helper PCI: dw-rockchip: Fix weird indentation PCI: dw-rockchip: Fix initial PERST# GPIO value PCI: dw-rockchip: Add error messages in .probe() error paths PCI: rockchip: Use GPIOD_OUT_LOW flag while requesting ep_gpio PCI: rockchip-host: Wait 100ms after reset before starting configuration PCI: rockchip-host: Fix rockchip_pcie_host_init_port() PERST# handling
This commit is contained in:
commit
8240a9b4a5
@ -311,16 +311,30 @@ config PCIE_RCAR_GEN4_EP
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SoCs. To compile this driver as a module, choose M here: the module
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will be called pcie-rcar-gen4.ko. This uses the DesignWare core.
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config PCIE_ROCKCHIP_DW
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bool
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config PCIE_ROCKCHIP_DW_HOST
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bool "Rockchip DesignWare PCIe controller"
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select PCIE_DW
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select PCIE_DW_HOST
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bool "Rockchip DesignWare PCIe controller (host mode)"
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depends on PCI_MSI
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depends on ARCH_ROCKCHIP || COMPILE_TEST
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depends on OF
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select PCIE_DW_HOST
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select PCIE_ROCKCHIP_DW
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help
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Enables support for the DesignWare PCIe controller in the
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Rockchip SoC except RK3399.
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Rockchip SoC (except RK3399) to work in host mode.
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config PCIE_ROCKCHIP_DW_EP
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bool "Rockchip DesignWare PCIe controller (endpoint mode)"
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depends on ARCH_ROCKCHIP || COMPILE_TEST
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depends on OF
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depends on PCI_ENDPOINT
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select PCIE_DW_EP
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select PCIE_ROCKCHIP_DW
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help
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Enables support for the DesignWare PCIe controller in the
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Rockchip SoC (except RK3399) to work in endpoint mode.
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config PCI_EXYNOS
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tristate "Samsung Exynos PCIe controller"
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@ -16,7 +16,7 @@ obj-$(CONFIG_PCIE_QCOM) += pcie-qcom.o
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obj-$(CONFIG_PCIE_QCOM_EP) += pcie-qcom-ep.o
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obj-$(CONFIG_PCIE_ARMADA_8K) += pcie-armada8k.o
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obj-$(CONFIG_PCIE_ARTPEC6) += pcie-artpec6.o
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obj-$(CONFIG_PCIE_ROCKCHIP_DW_HOST) += pcie-dw-rockchip.o
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obj-$(CONFIG_PCIE_ROCKCHIP_DW) += pcie-dw-rockchip.o
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obj-$(CONFIG_PCIE_INTEL_GW) += pcie-intel-gw.o
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obj-$(CONFIG_PCIE_KEEMBAY) += pcie-keembay.o
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obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
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@ -34,10 +34,16 @@
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#define to_rockchip_pcie(x) dev_get_drvdata((x)->dev)
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#define PCIE_CLIENT_RC_MODE HIWORD_UPDATE_BIT(0x40)
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#define PCIE_CLIENT_EP_MODE HIWORD_UPDATE(0xf0, 0x0)
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#define PCIE_CLIENT_ENABLE_LTSSM HIWORD_UPDATE_BIT(0xc)
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#define PCIE_CLIENT_DISABLE_LTSSM HIWORD_UPDATE(0x0c, 0x8)
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#define PCIE_CLIENT_INTR_STATUS_MISC 0x10
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#define PCIE_CLIENT_INTR_MASK_MISC 0x24
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#define PCIE_SMLH_LINKUP BIT(16)
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#define PCIE_RDLH_LINKUP BIT(17)
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#define PCIE_LINKUP (PCIE_SMLH_LINKUP | PCIE_RDLH_LINKUP)
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#define PCIE_RDLH_LINK_UP_CHGED BIT(1)
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#define PCIE_LINK_REQ_RST_NOT_INT BIT(2)
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#define PCIE_L0S_ENTRY 0x11
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#define PCIE_CLIENT_GENERAL_CONTROL 0x0
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#define PCIE_CLIENT_INTR_STATUS_LEGACY 0x8
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@ -49,25 +55,30 @@
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#define PCIE_LTSSM_STATUS_MASK GENMASK(5, 0)
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struct rockchip_pcie {
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struct dw_pcie pci;
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void __iomem *apb_base;
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struct phy *phy;
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struct clk_bulk_data *clks;
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unsigned int clk_cnt;
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struct reset_control *rst;
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struct gpio_desc *rst_gpio;
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struct regulator *vpcie3v3;
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struct irq_domain *irq_domain;
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struct dw_pcie pci;
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void __iomem *apb_base;
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struct phy *phy;
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struct clk_bulk_data *clks;
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unsigned int clk_cnt;
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struct reset_control *rst;
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struct gpio_desc *rst_gpio;
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struct regulator *vpcie3v3;
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struct irq_domain *irq_domain;
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const struct rockchip_pcie_of_data *data;
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};
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static int rockchip_pcie_readl_apb(struct rockchip_pcie *rockchip,
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u32 reg)
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struct rockchip_pcie_of_data {
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enum dw_pcie_device_mode mode;
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const struct pci_epc_features *epc_features;
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};
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static int rockchip_pcie_readl_apb(struct rockchip_pcie *rockchip, u32 reg)
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{
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return readl_relaxed(rockchip->apb_base + reg);
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}
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static void rockchip_pcie_writel_apb(struct rockchip_pcie *rockchip,
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u32 val, u32 reg)
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static void rockchip_pcie_writel_apb(struct rockchip_pcie *rockchip, u32 val,
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u32 reg)
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{
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writel_relaxed(val, rockchip->apb_base + reg);
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}
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@ -144,16 +155,27 @@ static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
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return 0;
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}
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static u32 rockchip_pcie_get_ltssm(struct rockchip_pcie *rockchip)
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{
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return rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS);
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}
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static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip)
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{
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rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_ENABLE_LTSSM,
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PCIE_CLIENT_GENERAL_CONTROL);
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}
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static void rockchip_pcie_disable_ltssm(struct rockchip_pcie *rockchip)
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{
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rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_DISABLE_LTSSM,
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PCIE_CLIENT_GENERAL_CONTROL);
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}
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static int rockchip_pcie_link_up(struct dw_pcie *pci)
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{
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struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);
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u32 val = rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS);
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u32 val = rockchip_pcie_get_ltssm(rockchip);
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if ((val & PCIE_LINKUP) == PCIE_LINKUP &&
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(val & PCIE_LTSSM_STATUS_MASK) == PCIE_L0S_ENTRY)
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@ -186,12 +208,18 @@ static int rockchip_pcie_start_link(struct dw_pcie *pci)
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return 0;
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}
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static void rockchip_pcie_stop_link(struct dw_pcie *pci)
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{
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struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);
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rockchip_pcie_disable_ltssm(rockchip);
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}
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static int rockchip_pcie_host_init(struct dw_pcie_rp *pp)
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{
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struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
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struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);
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struct device *dev = rockchip->pci.dev;
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u32 val = HIWORD_UPDATE_BIT(PCIE_LTSSM_ENABLE_ENHANCE);
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int irq, ret;
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irq = of_irq_get_byname(dev->of_node, "legacy");
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@ -205,12 +233,6 @@ static int rockchip_pcie_host_init(struct dw_pcie_rp *pp)
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irq_set_chained_handler_and_data(irq, rockchip_pcie_intx_handler,
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rockchip);
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/* LTSSM enable control mode */
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rockchip_pcie_writel_apb(rockchip, val, PCIE_CLIENT_HOT_RESET_CTRL);
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rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_RC_MODE,
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PCIE_CLIENT_GENERAL_CONTROL);
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return 0;
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}
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@ -218,6 +240,82 @@ static const struct dw_pcie_host_ops rockchip_pcie_host_ops = {
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.init = rockchip_pcie_host_init,
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};
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static void rockchip_pcie_ep_init(struct dw_pcie_ep *ep)
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{
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
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enum pci_barno bar;
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for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
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dw_pcie_ep_reset_bar(pci, bar);
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};
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static int rockchip_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
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unsigned int type, u16 interrupt_num)
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{
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
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switch (type) {
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case PCI_IRQ_INTX:
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return dw_pcie_ep_raise_intx_irq(ep, func_no);
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case PCI_IRQ_MSI:
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return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
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case PCI_IRQ_MSIX:
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return dw_pcie_ep_raise_msix_irq(ep, func_no, interrupt_num);
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default:
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dev_err(pci->dev, "UNKNOWN IRQ type\n");
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}
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return 0;
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}
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static const struct pci_epc_features rockchip_pcie_epc_features_rk3568 = {
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.linkup_notifier = true,
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.msi_capable = true,
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.msix_capable = true,
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.align = SZ_64K,
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.bar[BAR_0] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_1] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_2] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_3] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_4] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_5] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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};
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/*
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* BAR4 on rk3588 exposes the ATU Port Logic Structure to the host regardless of
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* iATU settings for BAR4. This means that BAR4 cannot be used by an EPF driver,
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* so mark it as RESERVED. (rockchip_pcie_ep_init() will disable all BARs by
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* default.) If the host could write to BAR4, the iATU settings (for all other
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* BARs) would be overwritten, resulting in (all other BARs) no longer working.
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*/
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static const struct pci_epc_features rockchip_pcie_epc_features_rk3588 = {
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.linkup_notifier = true,
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.msi_capable = true,
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.msix_capable = true,
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.align = SZ_64K,
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.bar[BAR_0] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_1] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_2] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_3] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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.bar[BAR_4] = { .type = BAR_RESERVED, },
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.bar[BAR_5] = { .type = BAR_FIXED, .fixed_size = SZ_1M, },
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};
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static const struct pci_epc_features *
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rockchip_pcie_get_features(struct dw_pcie_ep *ep)
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{
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struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
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struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);
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return rockchip->data->epc_features;
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}
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static const struct dw_pcie_ep_ops rockchip_pcie_ep_ops = {
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.init = rockchip_pcie_ep_init,
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.raise_irq = rockchip_pcie_raise_irq,
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.get_features = rockchip_pcie_get_features,
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};
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static int rockchip_pcie_clk_init(struct rockchip_pcie *rockchip)
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{
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struct device *dev = rockchip->pci.dev;
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@ -225,11 +323,15 @@ static int rockchip_pcie_clk_init(struct rockchip_pcie *rockchip)
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ret = devm_clk_bulk_get_all(dev, &rockchip->clks);
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if (ret < 0)
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return ret;
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return dev_err_probe(dev, ret, "failed to get clocks\n");
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rockchip->clk_cnt = ret;
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return clk_bulk_prepare_enable(rockchip->clk_cnt, rockchip->clks);
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ret = clk_bulk_prepare_enable(rockchip->clk_cnt, rockchip->clks);
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if (ret)
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return dev_err_probe(dev, ret, "failed to enable clocks\n");
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|
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return 0;
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}
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||||
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static int rockchip_pcie_resource_get(struct platform_device *pdev,
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@ -237,12 +339,14 @@ static int rockchip_pcie_resource_get(struct platform_device *pdev,
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||||
{
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rockchip->apb_base = devm_platform_ioremap_resource_byname(pdev, "apb");
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if (IS_ERR(rockchip->apb_base))
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return PTR_ERR(rockchip->apb_base);
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||||
return dev_err_probe(&pdev->dev, PTR_ERR(rockchip->apb_base),
|
||||
"failed to map apb registers\n");
|
||||
|
||||
rockchip->rst_gpio = devm_gpiod_get_optional(&pdev->dev, "reset",
|
||||
GPIOD_OUT_HIGH);
|
||||
GPIOD_OUT_LOW);
|
||||
if (IS_ERR(rockchip->rst_gpio))
|
||||
return PTR_ERR(rockchip->rst_gpio);
|
||||
return dev_err_probe(&pdev->dev, PTR_ERR(rockchip->rst_gpio),
|
||||
"failed to get reset gpio\n");
|
||||
|
||||
rockchip->rst = devm_reset_control_array_get_exclusive(&pdev->dev);
|
||||
if (IS_ERR(rockchip->rst))
|
||||
@ -282,15 +386,127 @@ static void rockchip_pcie_phy_deinit(struct rockchip_pcie *rockchip)
|
||||
static const struct dw_pcie_ops dw_pcie_ops = {
|
||||
.link_up = rockchip_pcie_link_up,
|
||||
.start_link = rockchip_pcie_start_link,
|
||||
.stop_link = rockchip_pcie_stop_link,
|
||||
};
|
||||
|
||||
static irqreturn_t rockchip_pcie_ep_sys_irq_thread(int irq, void *arg)
|
||||
{
|
||||
struct rockchip_pcie *rockchip = arg;
|
||||
struct dw_pcie *pci = &rockchip->pci;
|
||||
struct device *dev = pci->dev;
|
||||
u32 reg, val;
|
||||
|
||||
reg = rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_INTR_STATUS_MISC);
|
||||
rockchip_pcie_writel_apb(rockchip, reg, PCIE_CLIENT_INTR_STATUS_MISC);
|
||||
|
||||
dev_dbg(dev, "PCIE_CLIENT_INTR_STATUS_MISC: %#x\n", reg);
|
||||
dev_dbg(dev, "LTSSM_STATUS: %#x\n", rockchip_pcie_get_ltssm(rockchip));
|
||||
|
||||
if (reg & PCIE_LINK_REQ_RST_NOT_INT) {
|
||||
dev_dbg(dev, "hot reset or link-down reset\n");
|
||||
dw_pcie_ep_linkdown(&pci->ep);
|
||||
}
|
||||
|
||||
if (reg & PCIE_RDLH_LINK_UP_CHGED) {
|
||||
val = rockchip_pcie_get_ltssm(rockchip);
|
||||
if ((val & PCIE_LINKUP) == PCIE_LINKUP) {
|
||||
dev_dbg(dev, "link up\n");
|
||||
dw_pcie_ep_linkup(&pci->ep);
|
||||
}
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int rockchip_pcie_configure_rc(struct rockchip_pcie *rockchip)
|
||||
{
|
||||
struct dw_pcie_rp *pp;
|
||||
u32 val;
|
||||
|
||||
if (!IS_ENABLED(CONFIG_PCIE_ROCKCHIP_DW_HOST))
|
||||
return -ENODEV;
|
||||
|
||||
/* LTSSM enable control mode */
|
||||
val = HIWORD_UPDATE_BIT(PCIE_LTSSM_ENABLE_ENHANCE);
|
||||
rockchip_pcie_writel_apb(rockchip, val, PCIE_CLIENT_HOT_RESET_CTRL);
|
||||
|
||||
rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_RC_MODE,
|
||||
PCIE_CLIENT_GENERAL_CONTROL);
|
||||
|
||||
pp = &rockchip->pci.pp;
|
||||
pp->ops = &rockchip_pcie_host_ops;
|
||||
|
||||
return dw_pcie_host_init(pp);
|
||||
}
|
||||
|
||||
static int rockchip_pcie_configure_ep(struct platform_device *pdev,
|
||||
struct rockchip_pcie *rockchip)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
int irq, ret;
|
||||
u32 val;
|
||||
|
||||
if (!IS_ENABLED(CONFIG_PCIE_ROCKCHIP_DW_EP))
|
||||
return -ENODEV;
|
||||
|
||||
irq = platform_get_irq_byname(pdev, "sys");
|
||||
if (irq < 0) {
|
||||
dev_err(dev, "missing sys IRQ resource\n");
|
||||
return irq;
|
||||
}
|
||||
|
||||
ret = devm_request_threaded_irq(dev, irq, NULL,
|
||||
rockchip_pcie_ep_sys_irq_thread,
|
||||
IRQF_ONESHOT, "pcie-sys", rockchip);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to request PCIe sys IRQ\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* LTSSM enable control mode */
|
||||
val = HIWORD_UPDATE_BIT(PCIE_LTSSM_ENABLE_ENHANCE);
|
||||
rockchip_pcie_writel_apb(rockchip, val, PCIE_CLIENT_HOT_RESET_CTRL);
|
||||
|
||||
rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_EP_MODE,
|
||||
PCIE_CLIENT_GENERAL_CONTROL);
|
||||
|
||||
rockchip->pci.ep.ops = &rockchip_pcie_ep_ops;
|
||||
rockchip->pci.ep.page_size = SZ_64K;
|
||||
|
||||
dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
|
||||
|
||||
ret = dw_pcie_ep_init(&rockchip->pci.ep);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to initialize endpoint\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = dw_pcie_ep_init_registers(&rockchip->pci.ep);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to initialize DWC endpoint registers\n");
|
||||
dw_pcie_ep_deinit(&rockchip->pci.ep);
|
||||
return ret;
|
||||
}
|
||||
|
||||
pci_epc_init_notify(rockchip->pci.ep.epc);
|
||||
|
||||
/* unmask DLL up/down indicator and hot reset/link-down reset */
|
||||
rockchip_pcie_writel_apb(rockchip, 0x60000, PCIE_CLIENT_INTR_MASK_MISC);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rockchip_pcie_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct rockchip_pcie *rockchip;
|
||||
struct dw_pcie_rp *pp;
|
||||
const struct rockchip_pcie_of_data *data;
|
||||
int ret;
|
||||
|
||||
data = of_device_get_match_data(dev);
|
||||
if (!data)
|
||||
return -EINVAL;
|
||||
|
||||
rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL);
|
||||
if (!rockchip)
|
||||
return -ENOMEM;
|
||||
@ -299,9 +515,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
|
||||
|
||||
rockchip->pci.dev = dev;
|
||||
rockchip->pci.ops = &dw_pcie_ops;
|
||||
|
||||
pp = &rockchip->pci.pp;
|
||||
pp->ops = &rockchip_pcie_host_ops;
|
||||
rockchip->data = data;
|
||||
|
||||
ret = rockchip_pcie_resource_get(pdev, rockchip);
|
||||
if (ret)
|
||||
@ -320,10 +534,9 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
|
||||
rockchip->vpcie3v3 = NULL;
|
||||
} else {
|
||||
ret = regulator_enable(rockchip->vpcie3v3);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to enable vpcie3v3 regulator\n");
|
||||
return ret;
|
||||
}
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret,
|
||||
"failed to enable vpcie3v3 regulator\n");
|
||||
}
|
||||
|
||||
ret = rockchip_pcie_phy_init(rockchip);
|
||||
@ -338,10 +551,26 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
|
||||
if (ret)
|
||||
goto deinit_phy;
|
||||
|
||||
ret = dw_pcie_host_init(pp);
|
||||
if (!ret)
|
||||
return 0;
|
||||
switch (data->mode) {
|
||||
case DW_PCIE_RC_TYPE:
|
||||
ret = rockchip_pcie_configure_rc(rockchip);
|
||||
if (ret)
|
||||
goto deinit_clk;
|
||||
break;
|
||||
case DW_PCIE_EP_TYPE:
|
||||
ret = rockchip_pcie_configure_ep(pdev, rockchip);
|
||||
if (ret)
|
||||
goto deinit_clk;
|
||||
break;
|
||||
default:
|
||||
dev_err(dev, "INVALID device type %d\n", data->mode);
|
||||
ret = -EINVAL;
|
||||
goto deinit_clk;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
deinit_clk:
|
||||
clk_bulk_disable_unprepare(rockchip->clk_cnt, rockchip->clks);
|
||||
deinit_phy:
|
||||
rockchip_pcie_phy_deinit(rockchip);
|
||||
@ -352,8 +581,33 @@ disable_regulator:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct rockchip_pcie_of_data rockchip_pcie_rc_of_data_rk3568 = {
|
||||
.mode = DW_PCIE_RC_TYPE,
|
||||
};
|
||||
|
||||
static const struct rockchip_pcie_of_data rockchip_pcie_ep_of_data_rk3568 = {
|
||||
.mode = DW_PCIE_EP_TYPE,
|
||||
.epc_features = &rockchip_pcie_epc_features_rk3568,
|
||||
};
|
||||
|
||||
static const struct rockchip_pcie_of_data rockchip_pcie_ep_of_data_rk3588 = {
|
||||
.mode = DW_PCIE_EP_TYPE,
|
||||
.epc_features = &rockchip_pcie_epc_features_rk3588,
|
||||
};
|
||||
|
||||
static const struct of_device_id rockchip_pcie_of_match[] = {
|
||||
{ .compatible = "rockchip,rk3568-pcie", },
|
||||
{
|
||||
.compatible = "rockchip,rk3568-pcie",
|
||||
.data = &rockchip_pcie_rc_of_data_rk3568,
|
||||
},
|
||||
{
|
||||
.compatible = "rockchip,rk3568-pcie-ep",
|
||||
.data = &rockchip_pcie_ep_of_data_rk3568,
|
||||
},
|
||||
{
|
||||
.compatible = "rockchip,rk3588-pcie-ep",
|
||||
.data = &rockchip_pcie_ep_of_data_rk3588,
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
|
@ -322,8 +322,11 @@ static int rockchip_pcie_host_init_port(struct rockchip_pcie *rockchip)
|
||||
rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
|
||||
PCIE_CLIENT_CONFIG);
|
||||
|
||||
msleep(PCIE_T_PVPERL_MS);
|
||||
gpiod_set_value_cansleep(rockchip->ep_gpio, 1);
|
||||
|
||||
msleep(PCIE_T_RRS_READY_MS);
|
||||
|
||||
/* 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,
|
||||
|
@ -121,7 +121,7 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
|
||||
|
||||
if (rockchip->is_rc) {
|
||||
rockchip->ep_gpio = devm_gpiod_get_optional(dev, "ep",
|
||||
GPIOD_OUT_HIGH);
|
||||
GPIOD_OUT_LOW);
|
||||
if (IS_ERR(rockchip->ep_gpio))
|
||||
return dev_err_probe(dev, PTR_ERR(rockchip->ep_gpio),
|
||||
"failed to get ep GPIO\n");
|
||||
|
@ -16,6 +16,13 @@
|
||||
/* Power stable to PERST# inactive from PCIe card Electromechanical Spec */
|
||||
#define PCIE_T_PVPERL_MS 100
|
||||
|
||||
/*
|
||||
* End of conventional reset (PERST# de-asserted) to first configuration
|
||||
* request (device able to respond with a "Request Retry Status" completion),
|
||||
* from PCIe r6.0, sec 6.6.1.
|
||||
*/
|
||||
#define PCIE_T_RRS_READY_MS 100
|
||||
|
||||
/*
|
||||
* PCIe r6.0, sec 5.3.3.2.1 <PME Synchronization>
|
||||
* Recommends 1ms to 10ms timeout to check L2 ready.
|
||||
|
Loading…
Reference in New Issue
Block a user