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-rw-r--r--drivers/pci/controller/dwc/Kconfig12
-rw-r--r--drivers/pci/controller/dwc/Makefile1
-rw-r--r--drivers/pci/controller/dwc/pci-imx6.c40
-rw-r--r--drivers/pci/controller/dwc/pcie-designware-debugfs.c16
-rw-r--r--drivers/pci/controller/dwc/pcie-designware-host.c107
-rw-r--r--drivers/pci/controller/dwc/pcie-designware.c14
-rw-r--r--drivers/pci/controller/dwc/pcie-designware.h19
-rw-r--r--drivers/pci/controller/dwc/pcie-dw-rockchip.c16
-rw-r--r--drivers/pci/controller/dwc/pcie-qcom.c327
-rw-r--r--drivers/pci/controller/dwc/pcie-sophgo.c257
10 files changed, 674 insertions, 135 deletions
diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index d9f0386396ed..ff6b6d9e18ec 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -19,6 +19,7 @@ config PCIE_DW_DEBUGFS
config PCIE_DW_HOST
bool
select PCIE_DW
+ select IRQ_MSI_LIB
config PCIE_DW_EP
bool
@@ -296,6 +297,7 @@ config PCIE_QCOM
select PCIE_DW_HOST
select CRC8
select PCIE_QCOM_COMMON
+ select PCI_HOST_COMMON
help
Say Y here to enable PCIe controller support on Qualcomm SoCs. The
PCIe controller uses the DesignWare core plus Qualcomm-specific
@@ -402,6 +404,16 @@ config PCIE_UNIPHIER_EP
Say Y here if you want PCIe endpoint controller support on
UniPhier SoCs. This driver supports Pro5 SoC.
+config PCIE_SOPHGO_DW
+ bool "Sophgo DesignWare PCIe controller (host mode)"
+ depends on ARCH_SOPHGO || COMPILE_TEST
+ depends on PCI_MSI
+ depends on OF
+ select PCIE_DW_HOST
+ help
+ Say Y here if you want PCIe host controller support on
+ Sophgo SoCs.
+
config PCIE_SPEAR13XX
bool "STMicroelectronics SPEAr PCIe controller"
depends on ARCH_SPEAR13XX || COMPILE_TEST
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index 908cb7f345db..6919d27798d1 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_PCIE_QCOM_EP) += pcie-qcom-ep.o
obj-$(CONFIG_PCIE_ARMADA_8K) += pcie-armada8k.o
obj-$(CONFIG_PCIE_ARTPEC6) += pcie-artpec6.o
obj-$(CONFIG_PCIE_ROCKCHIP_DW) += pcie-dw-rockchip.o
+obj-$(CONFIG_PCIE_SOPHGO_DW) += pcie-sophgo.o
obj-$(CONFIG_PCIE_INTEL_GW) += pcie-intel-gw.o
obj-$(CONFIG_PCIE_KEEMBAY) += pcie-keembay.o
obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 5a38cfaf989b..80e48746bbaf 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -860,7 +860,6 @@ static int imx95_pcie_core_reset(struct imx_pcie *imx_pcie, bool assert)
static void imx_pcie_assert_core_reset(struct imx_pcie *imx_pcie)
{
reset_control_assert(imx_pcie->pciephy_reset);
- reset_control_assert(imx_pcie->apps_reset);
if (imx_pcie->drvdata->core_reset)
imx_pcie->drvdata->core_reset(imx_pcie, true);
@@ -872,7 +871,6 @@ static void imx_pcie_assert_core_reset(struct imx_pcie *imx_pcie)
static int imx_pcie_deassert_core_reset(struct imx_pcie *imx_pcie)
{
reset_control_deassert(imx_pcie->pciephy_reset);
- reset_control_deassert(imx_pcie->apps_reset);
if (imx_pcie->drvdata->core_reset)
imx_pcie->drvdata->core_reset(imx_pcie, false);
@@ -1063,7 +1061,10 @@ static int imx_pcie_add_lut(struct imx_pcie *imx_pcie, u16 rid, u8 sid)
data1 |= IMX95_PE0_LUT_VLD;
regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA1, data1);
- data2 = IMX95_PE0_LUT_MASK; /* Match all bits of RID */
+ if (imx_pcie->drvdata->mode == DW_PCIE_EP_TYPE)
+ data2 = 0x7; /* In the EP mode, only 'Device ID' is required */
+ else
+ data2 = IMX95_PE0_LUT_MASK; /* Match all bits of RID */
data2 |= FIELD_PREP(IMX95_PE0_LUT_REQID, rid);
regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA2, data2);
@@ -1096,18 +1097,14 @@ static void imx_pcie_remove_lut(struct imx_pcie *imx_pcie, u16 rid)
}
}
-static int imx_pcie_enable_device(struct pci_host_bridge *bridge,
- struct pci_dev *pdev)
+static int imx_pcie_add_lut_by_rid(struct imx_pcie *imx_pcie, u32 rid)
{
- struct imx_pcie *imx_pcie = to_imx_pcie(to_dw_pcie_from_pp(bridge->sysdata));
- u32 sid_i, sid_m, rid = pci_dev_id(pdev);
+ struct device *dev = imx_pcie->pci->dev;
struct device_node *target;
- struct device *dev;
+ u32 sid_i, sid_m;
int err_i, err_m;
u32 sid = 0;
- dev = imx_pcie->pci->dev;
-
target = NULL;
err_i = of_map_id(dev->of_node, rid, "iommu-map", "iommu-map-mask",
&target, &sid_i);
@@ -1182,6 +1179,13 @@ static int imx_pcie_enable_device(struct pci_host_bridge *bridge,
return imx_pcie_add_lut(imx_pcie, rid, sid);
}
+static int imx_pcie_enable_device(struct pci_host_bridge *bridge, struct pci_dev *pdev)
+{
+ struct imx_pcie *imx_pcie = to_imx_pcie(to_dw_pcie_from_pp(bridge->sysdata));
+
+ return imx_pcie_add_lut_by_rid(imx_pcie, pci_dev_id(pdev));
+}
+
static void imx_pcie_disable_device(struct pci_host_bridge *bridge,
struct pci_dev *pdev)
{
@@ -1247,6 +1251,9 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp)
}
}
+ /* Make sure that PCIe LTSSM is cleared */
+ imx_pcie_ltssm_disable(dev);
+
ret = imx_pcie_deassert_core_reset(imx_pcie);
if (ret < 0) {
dev_err(dev, "pcie deassert core reset failed: %d\n", ret);
@@ -1385,6 +1392,8 @@ static const struct pci_epc_features imx8m_pcie_epc_features = {
.msix_capable = false,
.bar[BAR_1] = { .type = BAR_RESERVED, },
.bar[BAR_3] = { .type = BAR_RESERVED, },
+ .bar[BAR_4] = { .type = BAR_FIXED, .fixed_size = SZ_256, },
+ .bar[BAR_5] = { .type = BAR_RESERVED, },
.align = SZ_64K,
};
@@ -1465,9 +1474,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie,
pci_epc_init_notify(ep->epc);
- /* Start LTSSM. */
- imx_pcie_ltssm_enable(dev);
-
return 0;
}
@@ -1764,6 +1770,12 @@ static int imx_pcie_probe(struct platform_device *pdev)
ret = imx_add_pcie_ep(imx_pcie, pdev);
if (ret < 0)
return ret;
+
+ /*
+ * FIXME: Only single Device (EPF) is supported due to the
+ * Endpoint framework limitation.
+ */
+ imx_pcie_add_lut_by_rid(imx_pcie, 0);
} else {
pci->pp.use_atu_msg = true;
ret = dw_pcie_host_init(&pci->pp);
@@ -1912,7 +1924,7 @@ static const struct imx_pcie_drvdata drvdata[] = {
.mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE,
.mode_off[1] = IOMUXC_GPR12,
.mode_mask[1] = IMX8MQ_GPR12_PCIE2_CTRL_DEVICE_TYPE,
- .epc_features = &imx8m_pcie_epc_features,
+ .epc_features = &imx8q_pcie_epc_features,
.init_phy = imx8mq_pcie_init_phy,
.enable_ref_clk = imx8mm_pcie_enable_ref_clk,
},
diff --git a/drivers/pci/controller/dwc/pcie-designware-debugfs.c b/drivers/pci/controller/dwc/pcie-designware-debugfs.c
index c67601096c48..0fbf86c0b97e 100644
--- a/drivers/pci/controller/dwc/pcie-designware-debugfs.c
+++ b/drivers/pci/controller/dwc/pcie-designware-debugfs.c
@@ -814,14 +814,14 @@ static bool dw_pcie_ptm_context_update_visible(void *drvdata)
{
struct dw_pcie *pci = drvdata;
- return (pci->mode == DW_PCIE_EP_TYPE) ? true : false;
+ return pci->mode == DW_PCIE_EP_TYPE;
}
static bool dw_pcie_ptm_context_valid_visible(void *drvdata)
{
struct dw_pcie *pci = drvdata;
- return (pci->mode == DW_PCIE_RC_TYPE) ? true : false;
+ return pci->mode == DW_PCIE_RC_TYPE;
}
static bool dw_pcie_ptm_local_clock_visible(void *drvdata)
@@ -834,38 +834,38 @@ static bool dw_pcie_ptm_master_clock_visible(void *drvdata)
{
struct dw_pcie *pci = drvdata;
- return (pci->mode == DW_PCIE_EP_TYPE) ? true : false;
+ return pci->mode == DW_PCIE_EP_TYPE;
}
static bool dw_pcie_ptm_t1_visible(void *drvdata)
{
struct dw_pcie *pci = drvdata;
- return (pci->mode == DW_PCIE_EP_TYPE) ? true : false;
+ return pci->mode == DW_PCIE_EP_TYPE;
}
static bool dw_pcie_ptm_t2_visible(void *drvdata)
{
struct dw_pcie *pci = drvdata;
- return (pci->mode == DW_PCIE_RC_TYPE) ? true : false;
+ return pci->mode == DW_PCIE_RC_TYPE;
}
static bool dw_pcie_ptm_t3_visible(void *drvdata)
{
struct dw_pcie *pci = drvdata;
- return (pci->mode == DW_PCIE_RC_TYPE) ? true : false;
+ return pci->mode == DW_PCIE_RC_TYPE;
}
static bool dw_pcie_ptm_t4_visible(void *drvdata)
{
struct dw_pcie *pci = drvdata;
- return (pci->mode == DW_PCIE_EP_TYPE) ? true : false;
+ return pci->mode == DW_PCIE_EP_TYPE;
}
-const struct pcie_ptm_ops dw_pcie_ptm_ops = {
+static const struct pcie_ptm_ops dw_pcie_ptm_ops = {
.check_capability = dw_pcie_ptm_check_capability,
.context_update_write = dw_pcie_ptm_context_update_write,
.context_update_read = dw_pcie_ptm_context_update_read,
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 906277f9ffaf..952f8594b501 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -10,6 +10,7 @@
#include <linux/iopoll.h>
#include <linux/irqchip/chained_irq.h>
+#include <linux/irqchip/irq-msi-lib.h>
#include <linux/irqdomain.h>
#include <linux/msi.h>
#include <linux/of_address.h>
@@ -23,35 +24,21 @@
static struct pci_ops dw_pcie_ops;
static struct pci_ops dw_child_pcie_ops;
-static void dw_msi_ack_irq(struct irq_data *d)
-{
- irq_chip_ack_parent(d);
-}
-
-static void dw_msi_mask_irq(struct irq_data *d)
-{
- pci_msi_mask_irq(d);
- irq_chip_mask_parent(d);
-}
-
-static void dw_msi_unmask_irq(struct irq_data *d)
-{
- pci_msi_unmask_irq(d);
- irq_chip_unmask_parent(d);
-}
-
-static struct irq_chip dw_pcie_msi_irq_chip = {
- .name = "PCI-MSI",
- .irq_ack = dw_msi_ack_irq,
- .irq_mask = dw_msi_mask_irq,
- .irq_unmask = dw_msi_unmask_irq,
-};
-
-static struct msi_domain_info dw_pcie_msi_domain_info = {
- .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
- MSI_FLAG_NO_AFFINITY | MSI_FLAG_PCI_MSIX |
- MSI_FLAG_MULTI_PCI_MSI,
- .chip = &dw_pcie_msi_irq_chip,
+#define DW_PCIE_MSI_FLAGS_REQUIRED (MSI_FLAG_USE_DEF_DOM_OPS | \
+ MSI_FLAG_USE_DEF_CHIP_OPS | \
+ MSI_FLAG_NO_AFFINITY | \
+ MSI_FLAG_PCI_MSI_MASK_PARENT)
+#define DW_PCIE_MSI_FLAGS_SUPPORTED (MSI_FLAG_MULTI_PCI_MSI | \
+ MSI_FLAG_PCI_MSIX | \
+ MSI_GENERIC_FLAGS_MASK)
+
+static const struct msi_parent_ops dw_pcie_msi_parent_ops = {
+ .required_flags = DW_PCIE_MSI_FLAGS_REQUIRED,
+ .supported_flags = DW_PCIE_MSI_FLAGS_SUPPORTED,
+ .bus_select_token = DOMAIN_BUS_PCI_MSI,
+ .chip_flags = MSI_CHIP_FLAG_SET_ACK,
+ .prefix = "DW-",
+ .init_dev_msi_info = msi_lib_init_dev_msi_info,
};
/* MSI int handler */
@@ -227,30 +214,23 @@ static const struct irq_domain_ops dw_pcie_msi_domain_ops = {
int dw_pcie_allocate_domains(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct fwnode_handle *fwnode = of_fwnode_handle(pci->dev->of_node);
-
- pp->irq_domain = irq_domain_create_linear(fwnode, pp->num_vectors,
- &dw_pcie_msi_domain_ops, pp);
+ struct irq_domain_info info = {
+ .fwnode = dev_fwnode(pci->dev),
+ .ops = &dw_pcie_msi_domain_ops,
+ .size = pp->num_vectors,
+ .host_data = pp,
+ };
+
+ pp->irq_domain = msi_create_parent_irq_domain(&info, &dw_pcie_msi_parent_ops);
if (!pp->irq_domain) {
dev_err(pci->dev, "Failed to create IRQ domain\n");
return -ENOMEM;
}
- irq_domain_update_bus_token(pp->irq_domain, DOMAIN_BUS_NEXUS);
-
- pp->msi_domain = pci_msi_create_irq_domain(fwnode,
- &dw_pcie_msi_domain_info,
- pp->irq_domain);
- if (!pp->msi_domain) {
- dev_err(pci->dev, "Failed to create MSI domain\n");
- irq_domain_remove(pp->irq_domain);
- return -ENOMEM;
- }
-
return 0;
}
-static void dw_pcie_free_msi(struct dw_pcie_rp *pp)
+void dw_pcie_free_msi(struct dw_pcie_rp *pp)
{
u32 ctrl;
@@ -260,22 +240,36 @@ static void dw_pcie_free_msi(struct dw_pcie_rp *pp)
NULL, NULL);
}
- irq_domain_remove(pp->msi_domain);
irq_domain_remove(pp->irq_domain);
}
+EXPORT_SYMBOL_GPL(dw_pcie_free_msi);
-static void dw_pcie_msi_init(struct dw_pcie_rp *pp)
+void dw_pcie_msi_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
u64 msi_target = (u64)pp->msi_data;
+ u32 ctrl, num_ctrls;
if (!pci_msi_enabled() || !pp->has_msi_ctrl)
return;
+ num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
+
+ /* Initialize IRQ Status array */
+ for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK +
+ (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
+ pp->irq_mask[ctrl]);
+ dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_ENABLE +
+ (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
+ ~0);
+ }
+
/* Program the msi_data */
dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_LO, lower_32_bits(msi_target));
dw_pcie_writel_dbi(pci, PCIE_MSI_ADDR_HI, upper_32_bits(msi_target));
}
+EXPORT_SYMBOL_GPL(dw_pcie_msi_init);
static int dw_pcie_parse_split_msi_irq(struct dw_pcie_rp *pp)
{
@@ -317,7 +311,7 @@ static int dw_pcie_parse_split_msi_irq(struct dw_pcie_rp *pp)
return 0;
}
-static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
+int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct device *dev = pci->dev;
@@ -391,6 +385,7 @@ static int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
return 0;
}
+EXPORT_SYMBOL_GPL(dw_pcie_msi_host_init);
static void dw_pcie_host_request_msg_tlp_res(struct dw_pcie_rp *pp)
{
@@ -909,7 +904,7 @@ static void dw_pcie_config_presets(struct dw_pcie_rp *pp)
int dw_pcie_setup_rc(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- u32 val, ctrl, num_ctrls;
+ u32 val;
int ret;
/*
@@ -920,20 +915,6 @@ int dw_pcie_setup_rc(struct dw_pcie_rp *pp)
dw_pcie_setup(pci);
- if (pp->has_msi_ctrl) {
- num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
-
- /* Initialize IRQ Status array */
- for (ctrl = 0; ctrl < num_ctrls; ctrl++) {
- dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_MASK +
- (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- pp->irq_mask[ctrl]);
- dw_pcie_writel_dbi(pci, PCIE_MSI_INTR0_ENABLE +
- (ctrl * MSI_REG_CTRL_BLOCK_SIZE),
- ~0);
- }
- }
-
dw_pcie_msi_init(pp);
/* Setup RC BARs */
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 4d794964fa0f..89aad5a08928 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -702,18 +702,26 @@ int dw_pcie_wait_for_link(struct dw_pcie *pci)
int retries;
/* Check if the link is up or not */
- for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
+ for (retries = 0; retries < PCIE_LINK_WAIT_MAX_RETRIES; retries++) {
if (dw_pcie_link_up(pci))
break;
- msleep(LINK_WAIT_SLEEP_MS);
+ msleep(PCIE_LINK_WAIT_SLEEP_MS);
}
- if (retries >= LINK_WAIT_MAX_RETRIES) {
+ if (retries >= PCIE_LINK_WAIT_MAX_RETRIES) {
dev_info(pci->dev, "Phy link never came up\n");
return -ETIMEDOUT;
}
+ /*
+ * As per PCIe r6.0, sec 6.6.1, a Downstream Port that supports Link
+ * speeds greater than 5.0 GT/s, software must wait a minimum of 100 ms
+ * after Link training completes before sending a Configuration Request.
+ */
+ if (pci->max_link_speed > 2)
+ msleep(PCIE_RESET_CONFIG_WAIT_MS);
+
offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
val = dw_pcie_readw_dbi(pci, offset + PCI_EXP_LNKSTA);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index ce9e18554e42..00f52d472dcd 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -62,10 +62,6 @@
#define dw_pcie_cap_set(_pci, _cap) \
set_bit(DW_PCIE_CAP_ ## _cap, &(_pci)->caps)
-/* Parameters for the waiting for link up routine */
-#define LINK_WAIT_MAX_RETRIES 10
-#define LINK_WAIT_SLEEP_MS 90
-
/* Parameters for the waiting for iATU enabled routine */
#define LINK_WAIT_MAX_IATU_RETRIES 5
#define LINK_WAIT_IATU 9
@@ -417,7 +413,6 @@ struct dw_pcie_rp {
const struct dw_pcie_host_ops *ops;
int msi_irq[MAX_MSI_CTRLS];
struct irq_domain *irq_domain;
- struct irq_domain *msi_domain;
dma_addr_t msi_data;
struct irq_chip *msi_irq_chip;
u32 num_vectors;
@@ -759,6 +754,9 @@ static inline enum dw_pcie_ltssm dw_pcie_get_ltssm(struct dw_pcie *pci)
int dw_pcie_suspend_noirq(struct dw_pcie *pci);
int dw_pcie_resume_noirq(struct dw_pcie *pci);
irqreturn_t dw_handle_msi_irq(struct dw_pcie_rp *pp);
+void dw_pcie_msi_init(struct dw_pcie_rp *pp);
+int dw_pcie_msi_host_init(struct dw_pcie_rp *pp);
+void dw_pcie_free_msi(struct dw_pcie_rp *pp);
int dw_pcie_setup_rc(struct dw_pcie_rp *pp);
int dw_pcie_host_init(struct dw_pcie_rp *pp);
void dw_pcie_host_deinit(struct dw_pcie_rp *pp);
@@ -781,6 +779,17 @@ static inline irqreturn_t dw_handle_msi_irq(struct dw_pcie_rp *pp)
return IRQ_NONE;
}
+static inline void dw_pcie_msi_init(struct dw_pcie_rp *pp)
+{ }
+
+static inline int dw_pcie_msi_host_init(struct dw_pcie_rp *pp)
+{
+ return -ENODEV;
+}
+
+static inline void dw_pcie_free_msi(struct dw_pcie_rp *pp)
+{ }
+
static inline int dw_pcie_setup_rc(struct dw_pcie_rp *pp)
{
return 0;
diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
index 93171a392879..b5f5eee5a50e 100644
--- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
+++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
@@ -58,6 +58,8 @@
/* Hot Reset Control Register */
#define PCIE_CLIENT_HOT_RESET_CTRL 0x180
+#define PCIE_LTSSM_APP_DLY2_EN BIT(1)
+#define PCIE_LTSSM_APP_DLY2_DONE BIT(3)
#define PCIE_LTSSM_ENABLE_ENHANCE BIT(4)
/* LTSSM Status Register */
@@ -458,6 +460,7 @@ static irqreturn_t rockchip_pcie_rc_sys_irq_thread(int irq, void *arg)
if (reg & PCIE_RDLH_LINK_UP_CHGED) {
if (rockchip_pcie_link_up(pci)) {
+ msleep(PCIE_RESET_CONFIG_WAIT_MS);
dev_dbg(dev, "Received Link up event. Starting enumeration!\n");
/* Rescan the bus to enumerate endpoint devices */
pci_lock_rescan_remove();
@@ -474,7 +477,7 @@ 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;
+ 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);
@@ -485,6 +488,10 @@ static irqreturn_t rockchip_pcie_ep_sys_irq_thread(int irq, void *arg)
if (reg & PCIE_LINK_REQ_RST_NOT_INT) {
dev_dbg(dev, "hot reset or link-down reset\n");
dw_pcie_ep_linkdown(&pci->ep);
+ /* Stop delaying link training. */
+ val = HIWORD_UPDATE_BIT(PCIE_LTSSM_APP_DLY2_DONE);
+ rockchip_pcie_writel_apb(rockchip, val,
+ PCIE_CLIENT_HOT_RESET_CTRL);
}
if (reg & PCIE_RDLH_LINK_UP_CHGED) {
@@ -566,8 +573,11 @@ static int rockchip_pcie_configure_ep(struct platform_device *pdev,
return ret;
}
- /* LTSSM enable control mode */
- val = HIWORD_UPDATE_BIT(PCIE_LTSSM_ENABLE_ENHANCE);
+ /*
+ * LTSSM enable control mode, and automatically delay link training on
+ * hot reset/link-down reset.
+ */
+ val = HIWORD_UPDATE_BIT(PCIE_LTSSM_ENABLE_ENHANCE | PCIE_LTSSM_APP_DLY2_EN);
rockchip_pcie_writel_apb(rockchip, val, PCIE_CLIENT_HOT_RESET_CTRL);
rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_EP_MODE,
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index c789e3f85655..294babe1816e 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -21,7 +21,9 @@
#include <linux/limits.h>
#include <linux/init.h>
#include <linux/of.h>
+#include <linux/of_pci.h>
#include <linux/pci.h>
+#include <linux/pci-ecam.h>
#include <linux/pm_opp.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
@@ -34,6 +36,7 @@
#include <linux/units.h>
#include "../../pci.h"
+#include "../pci-host-common.h"
#include "pcie-designware.h"
#include "pcie-qcom-common.h"
@@ -255,13 +258,21 @@ struct qcom_pcie_ops {
* @ops: qcom PCIe ops structure
* @override_no_snoop: Override NO_SNOOP attribute in TLP to enable cache
* snooping
+ * @firmware_managed: Set if the Root Complex is firmware managed
*/
struct qcom_pcie_cfg {
const struct qcom_pcie_ops *ops;
bool override_no_snoop;
+ bool firmware_managed;
bool no_l0s;
};
+struct qcom_pcie_port {
+ struct list_head list;
+ struct gpio_desc *reset;
+ struct phy *phy;
+};
+
struct qcom_pcie {
struct dw_pcie *pci;
void __iomem *parf; /* DT parf */
@@ -274,24 +285,37 @@ struct qcom_pcie {
struct icc_path *icc_cpu;
const struct qcom_pcie_cfg *cfg;
struct dentry *debugfs;
+ struct list_head ports;
bool suspended;
bool use_pm_opp;
};
#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
-static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
+static void qcom_perst_assert(struct qcom_pcie *pcie, bool assert)
{
- gpiod_set_value_cansleep(pcie->reset, 1);
+ struct qcom_pcie_port *port;
+ int val = assert ? 1 : 0;
+
+ if (list_empty(&pcie->ports))
+ gpiod_set_value_cansleep(pcie->reset, val);
+ else
+ list_for_each_entry(port, &pcie->ports, list)
+ gpiod_set_value_cansleep(port->reset, val);
+
usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
}
+static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
+{
+ qcom_perst_assert(pcie, true);
+}
+
static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
{
/* Ensure that PERST has been asserted for at least 100 ms */
msleep(PCIE_T_PVPERL_MS);
- gpiod_set_value_cansleep(pcie->reset, 0);
- usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
+ qcom_perst_assert(pcie, false);
}
static int qcom_pcie_start_link(struct dw_pcie *pci)
@@ -1229,6 +1253,59 @@ static bool qcom_pcie_link_up(struct dw_pcie *pci)
return val & PCI_EXP_LNKSTA_DLLLA;
}
+static void qcom_pcie_phy_exit(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_port *port;
+
+ if (list_empty(&pcie->ports))
+ phy_exit(pcie->phy);
+ else
+ list_for_each_entry(port, &pcie->ports, list)
+ phy_exit(port->phy);
+}
+
+static void qcom_pcie_phy_power_off(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_port *port;
+
+ if (list_empty(&pcie->ports)) {
+ phy_power_off(pcie->phy);
+ } else {
+ list_for_each_entry(port, &pcie->ports, list)
+ phy_power_off(port->phy);
+ }
+}
+
+static int qcom_pcie_phy_power_on(struct qcom_pcie *pcie)
+{
+ struct qcom_pcie_port *port;
+ int ret = 0;
+
+ if (list_empty(&pcie->ports)) {
+ ret = phy_set_mode_ext(pcie->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_RC);
+ if (ret)
+ return ret;
+
+ ret = phy_power_on(pcie->phy);
+ if (ret)
+ return ret;
+ } else {
+ list_for_each_entry(port, &pcie->ports, list) {
+ ret = phy_set_mode_ext(port->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_RC);
+ if (ret)
+ return ret;
+
+ ret = phy_power_on(port->phy);
+ if (ret) {
+ qcom_pcie_phy_power_off(pcie);
+ return ret;
+ }
+ }
+ }
+
+ return ret;
+}
+
static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
@@ -1241,11 +1318,7 @@ static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
if (ret)
return ret;
- ret = phy_set_mode_ext(pcie->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_RC);
- if (ret)
- goto err_deinit;
-
- ret = phy_power_on(pcie->phy);
+ ret = qcom_pcie_phy_power_on(pcie);
if (ret)
goto err_deinit;
@@ -1268,7 +1341,7 @@ static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
err_assert_reset:
qcom_ep_reset_assert(pcie);
err_disable_phy:
- phy_power_off(pcie->phy);
+ qcom_pcie_phy_power_off(pcie);
err_deinit:
pcie->cfg->ops->deinit(pcie);
@@ -1281,7 +1354,7 @@ static void qcom_pcie_host_deinit(struct dw_pcie_rp *pp)
struct qcom_pcie *pcie = to_qcom_pcie(pci);
qcom_ep_reset_assert(pcie);
- phy_power_off(pcie->phy);
+ qcom_pcie_phy_power_off(pcie);
pcie->cfg->ops->deinit(pcie);
}
@@ -1426,6 +1499,10 @@ static const struct qcom_pcie_cfg cfg_sc8280xp = {
.no_l0s = true,
};
+static const struct qcom_pcie_cfg cfg_fw_managed = {
+ .firmware_managed = true,
+};
+
static const struct dw_pcie_ops dw_pcie_ops = {
.link_up = qcom_pcie_link_up,
.start_link = qcom_pcie_start_link,
@@ -1564,6 +1641,7 @@ static irqreturn_t qcom_pcie_global_irq_thread(int irq, void *data)
writel_relaxed(status, pcie->parf + PARF_INT_ALL_CLEAR);
if (FIELD_GET(PARF_INT_ALL_LINK_UP, status)) {
+ msleep(PCIE_RESET_CONFIG_WAIT_MS);
dev_dbg(dev, "Received Link up event. Starting enumeration!\n");
/* Rescan the bus to enumerate endpoint devices */
pci_lock_rescan_remove();
@@ -1579,10 +1657,128 @@ static irqreturn_t qcom_pcie_global_irq_thread(int irq, void *data)
return IRQ_HANDLED;
}
+static void qcom_pci_free_msi(void *ptr)
+{
+ struct dw_pcie_rp *pp = (struct dw_pcie_rp *)ptr;
+
+ if (pp && pp->has_msi_ctrl)
+ dw_pcie_free_msi(pp);
+}
+
+static int qcom_pcie_ecam_host_init(struct pci_config_window *cfg)
+{
+ struct device *dev = cfg->parent;
+ struct dw_pcie_rp *pp;
+ struct dw_pcie *pci;
+ int ret;
+
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pci->dev = dev;
+ pp = &pci->pp;
+ pci->dbi_base = cfg->win;
+ pp->num_vectors = MSI_DEF_NUM_VECTORS;
+
+ ret = dw_pcie_msi_host_init(pp);
+ if (ret)
+ return ret;
+
+ pp->has_msi_ctrl = true;
+ dw_pcie_msi_init(pp);
+
+ return devm_add_action_or_reset(dev, qcom_pci_free_msi, pp);
+}
+
+static const struct pci_ecam_ops pci_qcom_ecam_ops = {
+ .init = qcom_pcie_ecam_host_init,
+ .pci_ops = {
+ .map_bus = pci_ecam_map_bus,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
+ }
+};
+
+static int qcom_pcie_parse_port(struct qcom_pcie *pcie, struct device_node *node)
+{
+ struct device *dev = pcie->pci->dev;
+ struct qcom_pcie_port *port;
+ struct gpio_desc *reset;
+ struct phy *phy;
+ int ret;
+
+ reset = devm_fwnode_gpiod_get(dev, of_fwnode_handle(node),
+ "reset", GPIOD_OUT_HIGH, "PERST#");
+ if (IS_ERR(reset))
+ return PTR_ERR(reset);
+
+ phy = devm_of_phy_get(dev, node, NULL);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return -ENOMEM;
+
+ ret = phy_init(phy);
+ if (ret)
+ return ret;
+
+ port->reset = reset;
+ port->phy = phy;
+ INIT_LIST_HEAD(&port->list);
+ list_add_tail(&port->list, &pcie->ports);
+
+ return 0;
+}
+
+static int qcom_pcie_parse_ports(struct qcom_pcie *pcie)
+{
+ struct device *dev = pcie->pci->dev;
+ struct qcom_pcie_port *port, *tmp;
+ int ret = -ENOENT;
+
+ for_each_available_child_of_node_scoped(dev->of_node, of_port) {
+ ret = qcom_pcie_parse_port(pcie, of_port);
+ if (ret)
+ goto err_port_del;
+ }
+
+ return ret;
+
+err_port_del:
+ list_for_each_entry_safe(port, tmp, &pcie->ports, list)
+ list_del(&port->list);
+
+ return ret;
+}
+
+static int qcom_pcie_parse_legacy_binding(struct qcom_pcie *pcie)
+{
+ struct device *dev = pcie->pci->dev;
+ int ret;
+
+ pcie->phy = devm_phy_optional_get(dev, "pciephy");
+ if (IS_ERR(pcie->phy))
+ return PTR_ERR(pcie->phy);
+
+ pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
+ if (IS_ERR(pcie->reset))
+ return PTR_ERR(pcie->reset);
+
+ ret = phy_init(pcie->phy);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
static int qcom_pcie_probe(struct platform_device *pdev)
{
const struct qcom_pcie_cfg *pcie_cfg;
unsigned long max_freq = ULONG_MAX;
+ struct qcom_pcie_port *port, *tmp;
struct device *dev = &pdev->dev;
struct dev_pm_opp *opp;
struct qcom_pcie *pcie;
@@ -1593,24 +1789,64 @@ static int qcom_pcie_probe(struct platform_device *pdev)
char *name;
pcie_cfg = of_device_get_match_data(dev);
- if (!pcie_cfg || !pcie_cfg->ops) {
- dev_err(dev, "Invalid platform data\n");
- return -EINVAL;
+ if (!pcie_cfg) {
+ dev_err(dev, "No platform data\n");
+ return -ENODATA;
}
- pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
- if (!pcie)
- return -ENOMEM;
-
- pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
- if (!pci)
- return -ENOMEM;
+ if (!pcie_cfg->firmware_managed && !pcie_cfg->ops) {
+ dev_err(dev, "No platform ops\n");
+ return -ENODATA;
+ }
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0)
goto err_pm_runtime_put;
+ if (pcie_cfg->firmware_managed) {
+ struct pci_host_bridge *bridge;
+ struct pci_config_window *cfg;
+
+ bridge = devm_pci_alloc_host_bridge(dev, 0);
+ if (!bridge) {
+ ret = -ENOMEM;
+ goto err_pm_runtime_put;
+ }
+
+ /* Parse and map our ECAM configuration space area */
+ cfg = pci_host_common_ecam_create(dev, bridge,
+ &pci_qcom_ecam_ops);
+ if (IS_ERR(cfg)) {
+ ret = PTR_ERR(cfg);
+ goto err_pm_runtime_put;
+ }
+
+ bridge->sysdata = cfg;
+ bridge->ops = (struct pci_ops *)&pci_qcom_ecam_ops.pci_ops;
+ bridge->msi_domain = true;
+
+ ret = pci_host_probe(bridge);
+ if (ret)
+ goto err_pm_runtime_put;
+
+ return 0;
+ }
+
+ pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
+ if (!pcie) {
+ ret = -ENOMEM;
+ goto err_pm_runtime_put;
+ }
+
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci) {
+ ret = -ENOMEM;
+ goto err_pm_runtime_put;
+ }
+
+ INIT_LIST_HEAD(&pcie->ports);
+
pci->dev = dev;
pci->ops = &dw_pcie_ops;
pp = &pci->pp;
@@ -1619,12 +1855,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
pcie->cfg = pcie_cfg;
- pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
- if (IS_ERR(pcie->reset)) {
- ret = PTR_ERR(pcie->reset);
- goto err_pm_runtime_put;
- }
-
pcie->parf = devm_platform_ioremap_resource_byname(pdev, "parf");
if (IS_ERR(pcie->parf)) {
ret = PTR_ERR(pcie->parf);
@@ -1647,12 +1877,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
}
}
- pcie->phy = devm_phy_optional_get(dev, "pciephy");
- if (IS_ERR(pcie->phy)) {
- ret = PTR_ERR(pcie->phy);
- goto err_pm_runtime_put;
- }
-
/* OPP table is optional */
ret = devm_pm_opp_of_add_table(dev);
if (ret && ret != -ENODEV) {
@@ -1699,9 +1923,23 @@ static int qcom_pcie_probe(struct platform_device *pdev)
pp->ops = &qcom_pcie_dw_ops;
- ret = phy_init(pcie->phy);
- if (ret)
- goto err_pm_runtime_put;
+ ret = qcom_pcie_parse_ports(pcie);
+ if (ret) {
+ if (ret != -ENOENT) {
+ dev_err_probe(pci->dev, ret,
+ "Failed to parse Root Port: %d\n", ret);
+ goto err_pm_runtime_put;
+ }
+
+ /*
+ * In the case of properties not populated in Root Port node,
+ * fallback to the legacy method of parsing the Host Bridge
+ * node. This is to maintain DT backwards compatibility.
+ */
+ ret = qcom_pcie_parse_legacy_binding(pcie);
+ if (ret)
+ goto err_pm_runtime_put;
+ }
platform_set_drvdata(pdev, pcie);
@@ -1746,7 +1984,9 @@ static int qcom_pcie_probe(struct platform_device *pdev)
err_host_deinit:
dw_pcie_host_deinit(pp);
err_phy_exit:
- phy_exit(pcie->phy);
+ qcom_pcie_phy_exit(pcie);
+ list_for_each_entry_safe(port, tmp, &pcie->ports, list)
+ list_del(&port->list);
err_pm_runtime_put:
pm_runtime_put(dev);
pm_runtime_disable(dev);
@@ -1756,9 +1996,13 @@ err_pm_runtime_put:
static int qcom_pcie_suspend_noirq(struct device *dev)
{
- struct qcom_pcie *pcie = dev_get_drvdata(dev);
+ struct qcom_pcie *pcie;
int ret = 0;
+ pcie = dev_get_drvdata(dev);
+ if (!pcie)
+ return 0;
+
/*
* Set minimum bandwidth required to keep data path functional during
* suspend.
@@ -1812,9 +2056,13 @@ static int qcom_pcie_suspend_noirq(struct device *dev)
static int qcom_pcie_resume_noirq(struct device *dev)
{
- struct qcom_pcie *pcie = dev_get_drvdata(dev);
+ struct qcom_pcie *pcie;
int ret;
+ pcie = dev_get_drvdata(dev);
+ if (!pcie)
+ return 0;
+
if (pm_suspend_target_state != PM_SUSPEND_MEM) {
ret = icc_enable(pcie->icc_cpu);
if (ret) {
@@ -1849,6 +2097,7 @@ static const struct of_device_id qcom_pcie_match[] = {
{ .compatible = "qcom,pcie-ipq9574", .data = &cfg_2_9_0 },
{ .compatible = "qcom,pcie-msm8996", .data = &cfg_2_3_2 },
{ .compatible = "qcom,pcie-qcs404", .data = &cfg_2_4_0 },
+ { .compatible = "qcom,pcie-sa8255p", .data = &cfg_fw_managed },
{ .compatible = "qcom,pcie-sa8540p", .data = &cfg_sc8280xp },
{ .compatible = "qcom,pcie-sa8775p", .data = &cfg_1_34_0},
{ .compatible = "qcom,pcie-sc7280", .data = &cfg_1_9_0 },
diff --git a/drivers/pci/controller/dwc/pcie-sophgo.c b/drivers/pci/controller/dwc/pcie-sophgo.c
new file mode 100644
index 000000000000..ad4baaa34ffa
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-sophgo.c
@@ -0,0 +1,257 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sophgo DesignWare based PCIe host controller driver
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/platform_device.h>
+
+#include "pcie-designware.h"
+
+#define to_sophgo_pcie(x) dev_get_drvdata((x)->dev)
+
+#define PCIE_INT_SIGNAL 0xc48
+#define PCIE_INT_EN 0xca0
+
+#define PCIE_INT_SIGNAL_INTX GENMASK(8, 5)
+
+#define PCIE_INT_EN_INTX GENMASK(4, 1)
+#define PCIE_INT_EN_INT_MSI BIT(5)
+
+struct sophgo_pcie {
+ struct dw_pcie pci;
+ void __iomem *app_base;
+ struct clk_bulk_data *clks;
+ unsigned int clk_cnt;
+ struct irq_domain *irq_domain;
+};
+
+static int sophgo_pcie_readl_app(struct sophgo_pcie *sophgo, u32 reg)
+{
+ return readl_relaxed(sophgo->app_base + reg);
+}
+
+static void sophgo_pcie_writel_app(struct sophgo_pcie *sophgo, u32 val, u32 reg)
+{
+ writel_relaxed(val, sophgo->app_base + reg);
+}
+
+static void sophgo_pcie_intx_handler(struct irq_desc *desc)
+{
+ struct dw_pcie_rp *pp = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct sophgo_pcie *sophgo = to_sophgo_pcie(pci);
+ unsigned long hwirq, reg;
+
+ chained_irq_enter(chip, desc);
+
+ reg = sophgo_pcie_readl_app(sophgo, PCIE_INT_SIGNAL);
+ reg = FIELD_GET(PCIE_INT_SIGNAL_INTX, reg);
+
+ for_each_set_bit(hwirq, &reg, PCI_NUM_INTX)
+ generic_handle_domain_irq(sophgo->irq_domain, hwirq);
+
+ chained_irq_exit(chip, desc);
+}
+
+static void sophgo_intx_irq_mask(struct irq_data *d)
+{
+ struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct sophgo_pcie *sophgo = to_sophgo_pcie(pci);
+ unsigned long flags;
+ u32 val;
+
+ raw_spin_lock_irqsave(&pp->lock, flags);
+
+ val = sophgo_pcie_readl_app(sophgo, PCIE_INT_EN);
+ val &= ~FIELD_PREP(PCIE_INT_EN_INTX, BIT(d->hwirq));
+ sophgo_pcie_writel_app(sophgo, val, PCIE_INT_EN);
+
+ raw_spin_unlock_irqrestore(&pp->lock, flags);
+};
+
+static void sophgo_intx_irq_unmask(struct irq_data *d)
+{
+ struct dw_pcie_rp *pp = irq_data_get_irq_chip_data(d);
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct sophgo_pcie *sophgo = to_sophgo_pcie(pci);
+ unsigned long flags;
+ u32 val;
+
+ raw_spin_lock_irqsave(&pp->lock, flags);
+
+ val = sophgo_pcie_readl_app(sophgo, PCIE_INT_EN);
+ val |= FIELD_PREP(PCIE_INT_EN_INTX, BIT(d->hwirq));
+ sophgo_pcie_writel_app(sophgo, val, PCIE_INT_EN);
+
+ raw_spin_unlock_irqrestore(&pp->lock, flags);
+};
+
+static struct irq_chip sophgo_intx_irq_chip = {
+ .name = "INTx",
+ .irq_mask = sophgo_intx_irq_mask,
+ .irq_unmask = sophgo_intx_irq_unmask,
+};
+
+static int sophgo_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &sophgo_intx_irq_chip, handle_level_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+static const struct irq_domain_ops intx_domain_ops = {
+ .map = sophgo_pcie_intx_map,
+};
+
+static int sophgo_pcie_init_irq_domain(struct dw_pcie_rp *pp)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct sophgo_pcie *sophgo = to_sophgo_pcie(pci);
+ struct device *dev = sophgo->pci.dev;
+ struct fwnode_handle *intc;
+ int irq;
+
+ intc = device_get_named_child_node(dev, "interrupt-controller");
+ if (!intc) {
+ dev_err(dev, "missing child interrupt-controller node\n");
+ return -ENODEV;
+ }
+
+ irq = fwnode_irq_get(intc, 0);
+ if (irq < 0) {
+ dev_err(dev, "failed to get INTx irq number\n");
+ fwnode_handle_put(intc);
+ return irq;
+ }
+
+ sophgo->irq_domain = irq_domain_create_linear(intc, PCI_NUM_INTX,
+ &intx_domain_ops, pp);
+ fwnode_handle_put(intc);
+ if (!sophgo->irq_domain) {
+ dev_err(dev, "failed to get a INTx irq domain\n");
+ return -EINVAL;
+ }
+
+ return irq;
+}
+
+static void sophgo_pcie_msi_enable(struct dw_pcie_rp *pp)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct sophgo_pcie *sophgo = to_sophgo_pcie(pci);
+ unsigned long flags;
+ u32 val;
+
+ raw_spin_lock_irqsave(&pp->lock, flags);
+
+ val = sophgo_pcie_readl_app(sophgo, PCIE_INT_EN);
+ val |= PCIE_INT_EN_INT_MSI;
+ sophgo_pcie_writel_app(sophgo, val, PCIE_INT_EN);
+
+ raw_spin_unlock_irqrestore(&pp->lock, flags);
+}
+
+static int sophgo_pcie_host_init(struct dw_pcie_rp *pp)
+{
+ int irq;
+
+ irq = sophgo_pcie_init_irq_domain(pp);
+ if (irq < 0)
+ return irq;
+
+ irq_set_chained_handler_and_data(irq, sophgo_pcie_intx_handler, pp);
+
+ sophgo_pcie_msi_enable(pp);
+
+ return 0;
+}
+
+static const struct dw_pcie_host_ops sophgo_pcie_host_ops = {
+ .init = sophgo_pcie_host_init,
+};
+
+static int sophgo_pcie_clk_init(struct sophgo_pcie *sophgo)
+{
+ struct device *dev = sophgo->pci.dev;
+ int ret;
+
+ ret = devm_clk_bulk_get_all_enabled(dev, &sophgo->clks);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "failed to get clocks\n");
+
+ sophgo->clk_cnt = ret;
+
+ return 0;
+}
+
+static int sophgo_pcie_resource_get(struct platform_device *pdev,
+ struct sophgo_pcie *sophgo)
+{
+ sophgo->app_base = devm_platform_ioremap_resource_byname(pdev, "app");
+ if (IS_ERR(sophgo->app_base))
+ return dev_err_probe(&pdev->dev, PTR_ERR(sophgo->app_base),
+ "failed to map app registers\n");
+
+ return 0;
+}
+
+static int sophgo_pcie_configure_rc(struct sophgo_pcie *sophgo)
+{
+ struct dw_pcie_rp *pp;
+
+ pp = &sophgo->pci.pp;
+ pp->ops = &sophgo_pcie_host_ops;
+
+ return dw_pcie_host_init(pp);
+}
+
+static int sophgo_pcie_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sophgo_pcie *sophgo;
+ int ret;
+
+ sophgo = devm_kzalloc(dev, sizeof(*sophgo), GFP_KERNEL);
+ if (!sophgo)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, sophgo);
+
+ sophgo->pci.dev = dev;
+
+ ret = sophgo_pcie_resource_get(pdev, sophgo);
+ if (ret)
+ return ret;
+
+ ret = sophgo_pcie_clk_init(sophgo);
+ if (ret)
+ return ret;
+
+ return sophgo_pcie_configure_rc(sophgo);
+}
+
+static const struct of_device_id sophgo_pcie_of_match[] = {
+ { .compatible = "sophgo,sg2044-pcie" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sophgo_pcie_of_match);
+
+static struct platform_driver sophgo_pcie_driver = {
+ .driver = {
+ .name = "sophgo-pcie",
+ .of_match_table = sophgo_pcie_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = sophgo_pcie_probe,
+};
+builtin_platform_driver(sophgo_pcie_driver);
generated by cgit (git 2.34.1) at 2025-08-02 15:24:12 +0000