// SPDX-License-Identifier: GPL-2.0 /* * Microchip AXI PCIe Bridge host controller driver * * Copyright (c) 2018 - 2020 Microchip Corporation. All rights reserved. * * Author: Daire McNamara */ #include #include #include #include #include #include #include #include #include #include #include "../../pci.h" #include "pcie-plda.h" /* PCIe Bridge Phy and Controller Phy offsets */ #define MC_PCIE1_BRIDGE_ADDR 0x00008000u #define MC_PCIE1_CTRL_ADDR 0x0000a000u /* PCIe Controller Phy Regs */ #define SEC_ERROR_EVENT_CNT 0x20 #define DED_ERROR_EVENT_CNT 0x24 #define SEC_ERROR_INT 0x28 #define SEC_ERROR_INT_TX_RAM_SEC_ERR_INT GENMASK(3, 0) #define SEC_ERROR_INT_RX_RAM_SEC_ERR_INT GENMASK(7, 4) #define SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT GENMASK(11, 8) #define SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT GENMASK(15, 12) #define SEC_ERROR_INT_ALL_RAM_SEC_ERR_INT GENMASK(15, 0) #define NUM_SEC_ERROR_INTS (4) #define SEC_ERROR_INT_MASK 0x2c #define DED_ERROR_INT 0x30 #define DED_ERROR_INT_TX_RAM_DED_ERR_INT GENMASK(3, 0) #define DED_ERROR_INT_RX_RAM_DED_ERR_INT GENMASK(7, 4) #define DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT GENMASK(11, 8) #define DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT GENMASK(15, 12) #define DED_ERROR_INT_ALL_RAM_DED_ERR_INT GENMASK(15, 0) #define NUM_DED_ERROR_INTS (4) #define DED_ERROR_INT_MASK 0x34 #define ECC_CONTROL 0x38 #define ECC_CONTROL_TX_RAM_INJ_ERROR_0 BIT(0) #define ECC_CONTROL_TX_RAM_INJ_ERROR_1 BIT(1) #define ECC_CONTROL_TX_RAM_INJ_ERROR_2 BIT(2) #define ECC_CONTROL_TX_RAM_INJ_ERROR_3 BIT(3) #define ECC_CONTROL_RX_RAM_INJ_ERROR_0 BIT(4) #define ECC_CONTROL_RX_RAM_INJ_ERROR_1 BIT(5) #define ECC_CONTROL_RX_RAM_INJ_ERROR_2 BIT(6) #define ECC_CONTROL_RX_RAM_INJ_ERROR_3 BIT(7) #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_0 BIT(8) #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_1 BIT(9) #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_2 BIT(10) #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_3 BIT(11) #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_0 BIT(12) #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_1 BIT(13) #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_2 BIT(14) #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_3 BIT(15) #define ECC_CONTROL_TX_RAM_ECC_BYPASS BIT(24) #define ECC_CONTROL_RX_RAM_ECC_BYPASS BIT(25) #define ECC_CONTROL_PCIE2AXI_RAM_ECC_BYPASS BIT(26) #define ECC_CONTROL_AXI2PCIE_RAM_ECC_BYPASS BIT(27) #define PCIE_EVENT_INT 0x14c #define PCIE_EVENT_INT_L2_EXIT_INT BIT(0) #define PCIE_EVENT_INT_HOTRST_EXIT_INT BIT(1) #define PCIE_EVENT_INT_DLUP_EXIT_INT BIT(2) #define PCIE_EVENT_INT_MASK GENMASK(2, 0) #define PCIE_EVENT_INT_L2_EXIT_INT_MASK BIT(16) #define PCIE_EVENT_INT_HOTRST_EXIT_INT_MASK BIT(17) #define PCIE_EVENT_INT_DLUP_EXIT_INT_MASK BIT(18) #define PCIE_EVENT_INT_ENB_MASK GENMASK(18, 16) #define PCIE_EVENT_INT_ENB_SHIFT 16 #define NUM_PCIE_EVENTS (3) /* PCIe Config space MSI capability structure */ #define MC_MSI_CAP_CTRL_OFFSET 0xe0u /* Events */ #define EVENT_PCIE_L2_EXIT 0 #define EVENT_PCIE_HOTRST_EXIT 1 #define EVENT_PCIE_DLUP_EXIT 2 #define EVENT_SEC_TX_RAM_SEC_ERR 3 #define EVENT_SEC_RX_RAM_SEC_ERR 4 #define EVENT_SEC_PCIE2AXI_RAM_SEC_ERR 5 #define EVENT_SEC_AXI2PCIE_RAM_SEC_ERR 6 #define EVENT_DED_TX_RAM_DED_ERR 7 #define EVENT_DED_RX_RAM_DED_ERR 8 #define EVENT_DED_PCIE2AXI_RAM_DED_ERR 9 #define EVENT_DED_AXI2PCIE_RAM_DED_ERR 10 #define EVENT_LOCAL_DMA_END_ENGINE_0 11 #define EVENT_LOCAL_DMA_END_ENGINE_1 12 #define EVENT_LOCAL_DMA_ERROR_ENGINE_0 13 #define EVENT_LOCAL_DMA_ERROR_ENGINE_1 14 #define NUM_MC_EVENTS 15 #define EVENT_LOCAL_A_ATR_EVT_POST_ERR (NUM_MC_EVENTS + PLDA_AXI_POST_ERR) #define EVENT_LOCAL_A_ATR_EVT_FETCH_ERR (NUM_MC_EVENTS + PLDA_AXI_FETCH_ERR) #define EVENT_LOCAL_A_ATR_EVT_DISCARD_ERR (NUM_MC_EVENTS + PLDA_AXI_DISCARD_ERR) #define EVENT_LOCAL_A_ATR_EVT_DOORBELL (NUM_MC_EVENTS + PLDA_AXI_DOORBELL) #define EVENT_LOCAL_P_ATR_EVT_POST_ERR (NUM_MC_EVENTS + PLDA_PCIE_POST_ERR) #define EVENT_LOCAL_P_ATR_EVT_FETCH_ERR (NUM_MC_EVENTS + PLDA_PCIE_FETCH_ERR) #define EVENT_LOCAL_P_ATR_EVT_DISCARD_ERR (NUM_MC_EVENTS + PLDA_PCIE_DISCARD_ERR) #define EVENT_LOCAL_P_ATR_EVT_DOORBELL (NUM_MC_EVENTS + PLDA_PCIE_DOORBELL) #define EVENT_LOCAL_PM_MSI_INT_INTX (NUM_MC_EVENTS + PLDA_INTX) #define EVENT_LOCAL_PM_MSI_INT_MSI (NUM_MC_EVENTS + PLDA_MSI) #define EVENT_LOCAL_PM_MSI_INT_AER_EVT (NUM_MC_EVENTS + PLDA_AER_EVENT) #define EVENT_LOCAL_PM_MSI_INT_EVENTS (NUM_MC_EVENTS + PLDA_MISC_EVENTS) #define EVENT_LOCAL_PM_MSI_INT_SYS_ERR (NUM_MC_EVENTS + PLDA_SYS_ERR) #define NUM_EVENTS (NUM_MC_EVENTS + PLDA_INT_EVENT_NUM) #define PCIE_EVENT_CAUSE(x, s) \ [EVENT_PCIE_ ## x] = { __stringify(x), s } #define SEC_ERROR_CAUSE(x, s) \ [EVENT_SEC_ ## x] = { __stringify(x), s } #define DED_ERROR_CAUSE(x, s) \ [EVENT_DED_ ## x] = { __stringify(x), s } #define LOCAL_EVENT_CAUSE(x, s) \ [EVENT_LOCAL_ ## x] = { __stringify(x), s } #define PCIE_EVENT(x) \ .offset = PCIE_EVENT_INT, \ .mask_offset = PCIE_EVENT_INT, \ .mask_high = 1, \ .mask = PCIE_EVENT_INT_ ## x ## _INT, \ .enb_mask = PCIE_EVENT_INT_ENB_MASK #define SEC_EVENT(x) \ .offset = SEC_ERROR_INT, \ .mask_offset = SEC_ERROR_INT_MASK, \ .mask = SEC_ERROR_INT_ ## x ## _INT, \ .mask_high = 1, \ .enb_mask = 0 #define DED_EVENT(x) \ .offset = DED_ERROR_INT, \ .mask_offset = DED_ERROR_INT_MASK, \ .mask_high = 1, \ .mask = DED_ERROR_INT_ ## x ## _INT, \ .enb_mask = 0 #define LOCAL_EVENT(x) \ .offset = ISTATUS_LOCAL, \ .mask_offset = IMASK_LOCAL, \ .mask_high = 0, \ .mask = x ## _MASK, \ .enb_mask = 0 #define PCIE_EVENT_TO_EVENT_MAP(x) \ { PCIE_EVENT_INT_ ## x ## _INT, EVENT_PCIE_ ## x } #define SEC_ERROR_TO_EVENT_MAP(x) \ { SEC_ERROR_INT_ ## x ## _INT, EVENT_SEC_ ## x } #define DED_ERROR_TO_EVENT_MAP(x) \ { DED_ERROR_INT_ ## x ## _INT, EVENT_DED_ ## x } #define LOCAL_STATUS_TO_EVENT_MAP(x) \ { x ## _MASK, EVENT_LOCAL_ ## x } struct event_map { u32 reg_mask; u32 event_bit; }; struct mc_pcie { struct plda_pcie_rp plda; void __iomem *bridge_base_addr; void __iomem *ctrl_base_addr; }; struct cause { const char *sym; const char *str; }; static const struct cause event_cause[NUM_EVENTS] = { PCIE_EVENT_CAUSE(L2_EXIT, "L2 exit event"), PCIE_EVENT_CAUSE(HOTRST_EXIT, "Hot reset exit event"), PCIE_EVENT_CAUSE(DLUP_EXIT, "DLUP exit event"), SEC_ERROR_CAUSE(TX_RAM_SEC_ERR, "sec error in tx buffer"), SEC_ERROR_CAUSE(RX_RAM_SEC_ERR, "sec error in rx buffer"), SEC_ERROR_CAUSE(PCIE2AXI_RAM_SEC_ERR, "sec error in pcie2axi buffer"), SEC_ERROR_CAUSE(AXI2PCIE_RAM_SEC_ERR, "sec error in axi2pcie buffer"), DED_ERROR_CAUSE(TX_RAM_DED_ERR, "ded error in tx buffer"), DED_ERROR_CAUSE(RX_RAM_DED_ERR, "ded error in rx buffer"), DED_ERROR_CAUSE(PCIE2AXI_RAM_DED_ERR, "ded error in pcie2axi buffer"), DED_ERROR_CAUSE(AXI2PCIE_RAM_DED_ERR, "ded error in axi2pcie buffer"), LOCAL_EVENT_CAUSE(DMA_ERROR_ENGINE_0, "dma engine 0 error"), LOCAL_EVENT_CAUSE(DMA_ERROR_ENGINE_1, "dma engine 1 error"), LOCAL_EVENT_CAUSE(A_ATR_EVT_POST_ERR, "axi write request error"), LOCAL_EVENT_CAUSE(A_ATR_EVT_FETCH_ERR, "axi read request error"), LOCAL_EVENT_CAUSE(A_ATR_EVT_DISCARD_ERR, "axi read timeout"), LOCAL_EVENT_CAUSE(P_ATR_EVT_POST_ERR, "pcie write request error"), LOCAL_EVENT_CAUSE(P_ATR_EVT_FETCH_ERR, "pcie read request error"), LOCAL_EVENT_CAUSE(P_ATR_EVT_DISCARD_ERR, "pcie read timeout"), LOCAL_EVENT_CAUSE(PM_MSI_INT_AER_EVT, "aer event"), LOCAL_EVENT_CAUSE(PM_MSI_INT_EVENTS, "pm/ltr/hotplug event"), LOCAL_EVENT_CAUSE(PM_MSI_INT_SYS_ERR, "system error"), }; static struct event_map pcie_event_to_event[] = { PCIE_EVENT_TO_EVENT_MAP(L2_EXIT), PCIE_EVENT_TO_EVENT_MAP(HOTRST_EXIT), PCIE_EVENT_TO_EVENT_MAP(DLUP_EXIT), }; static struct event_map sec_error_to_event[] = { SEC_ERROR_TO_EVENT_MAP(TX_RAM_SEC_ERR), SEC_ERROR_TO_EVENT_MAP(RX_RAM_SEC_ERR), SEC_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_SEC_ERR), SEC_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_SEC_ERR), }; static struct event_map ded_error_to_event[] = { DED_ERROR_TO_EVENT_MAP(TX_RAM_DED_ERR), DED_ERROR_TO_EVENT_MAP(RX_RAM_DED_ERR), DED_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_DED_ERR), DED_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_DED_ERR), }; static struct event_map local_status_to_event[] = { LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_0), LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_1), LOCAL_STATUS_TO_EVENT_MAP(DMA_ERROR_ENGINE_0), LOCAL_STATUS_TO_EVENT_MAP(DMA_ERROR_ENGINE_1), LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_POST_ERR), LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_FETCH_ERR), LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_DISCARD_ERR), LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_DOORBELL), LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_POST_ERR), LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_FETCH_ERR), LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_DISCARD_ERR), LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_DOORBELL), LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_INTX), LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_MSI), LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_AER_EVT), LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_EVENTS), LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_SYS_ERR), }; static struct { u32 offset; u32 mask; u32 shift; u32 enb_mask; u32 mask_high; u32 mask_offset; } event_descs[] = { { PCIE_EVENT(L2_EXIT) }, { PCIE_EVENT(HOTRST_EXIT) }, { PCIE_EVENT(DLUP_EXIT) }, { SEC_EVENT(TX_RAM_SEC_ERR) }, { SEC_EVENT(RX_RAM_SEC_ERR) }, { SEC_EVENT(PCIE2AXI_RAM_SEC_ERR) }, { SEC_EVENT(AXI2PCIE_RAM_SEC_ERR) }, { DED_EVENT(TX_RAM_DED_ERR) }, { DED_EVENT(RX_RAM_DED_ERR) }, { DED_EVENT(PCIE2AXI_RAM_DED_ERR) }, { DED_EVENT(AXI2PCIE_RAM_DED_ERR) }, { LOCAL_EVENT(DMA_END_ENGINE_0) }, { LOCAL_EVENT(DMA_END_ENGINE_1) }, { LOCAL_EVENT(DMA_ERROR_ENGINE_0) }, { LOCAL_EVENT(DMA_ERROR_ENGINE_1) }, { LOCAL_EVENT(A_ATR_EVT_POST_ERR) }, { LOCAL_EVENT(A_ATR_EVT_FETCH_ERR) }, { LOCAL_EVENT(A_ATR_EVT_DISCARD_ERR) }, { LOCAL_EVENT(A_ATR_EVT_DOORBELL) }, { LOCAL_EVENT(P_ATR_EVT_POST_ERR) }, { LOCAL_EVENT(P_ATR_EVT_FETCH_ERR) }, { LOCAL_EVENT(P_ATR_EVT_DISCARD_ERR) }, { LOCAL_EVENT(P_ATR_EVT_DOORBELL) }, { LOCAL_EVENT(PM_MSI_INT_INTX) }, { LOCAL_EVENT(PM_MSI_INT_MSI) }, { LOCAL_EVENT(PM_MSI_INT_AER_EVT) }, { LOCAL_EVENT(PM_MSI_INT_EVENTS) }, { LOCAL_EVENT(PM_MSI_INT_SYS_ERR) }, }; static char poss_clks[][5] = { "fic0", "fic1", "fic2", "fic3" }; static struct mc_pcie *port; static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam) { struct plda_msi *msi = &port->plda.msi; u16 reg; u8 queue_size; /* Fixup MSI enable flag */ reg = readw_relaxed(ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_FLAGS); reg |= PCI_MSI_FLAGS_ENABLE; writew_relaxed(reg, ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_FLAGS); /* Fixup PCI MSI queue flags */ queue_size = FIELD_GET(PCI_MSI_FLAGS_QMASK, reg); reg |= FIELD_PREP(PCI_MSI_FLAGS_QSIZE, queue_size); writew_relaxed(reg, ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_FLAGS); /* Fixup MSI addr fields */ writel_relaxed(lower_32_bits(msi->vector_phy), ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_LO); writel_relaxed(upper_32_bits(msi->vector_phy), ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_HI); } static inline u32 reg_to_event(u32 reg, struct event_map field) { return (reg & field.reg_mask) ? BIT(field.event_bit) : 0; } static u32 pcie_events(struct mc_pcie *port) { u32 reg = readl_relaxed(port->ctrl_base_addr + PCIE_EVENT_INT); u32 val = 0; int i; for (i = 0; i < ARRAY_SIZE(pcie_event_to_event); i++) val |= reg_to_event(reg, pcie_event_to_event[i]); return val; } static u32 sec_errors(struct mc_pcie *port) { u32 reg = readl_relaxed(port->ctrl_base_addr + SEC_ERROR_INT); u32 val = 0; int i; for (i = 0; i < ARRAY_SIZE(sec_error_to_event); i++) val |= reg_to_event(reg, sec_error_to_event[i]); return val; } static u32 ded_errors(struct mc_pcie *port) { u32 reg = readl_relaxed(port->ctrl_base_addr + DED_ERROR_INT); u32 val = 0; int i; for (i = 0; i < ARRAY_SIZE(ded_error_to_event); i++) val |= reg_to_event(reg, ded_error_to_event[i]); return val; } static u32 local_events(struct mc_pcie *port) { u32 reg = readl_relaxed(port->bridge_base_addr + ISTATUS_LOCAL); u32 val = 0; int i; for (i = 0; i < ARRAY_SIZE(local_status_to_event); i++) val |= reg_to_event(reg, local_status_to_event[i]); return val; } static u32 mc_get_events(struct plda_pcie_rp *port) { struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda); u32 events = 0; events |= pcie_events(mc_port); events |= sec_errors(mc_port); events |= ded_errors(mc_port); events |= local_events(mc_port); return events; } static irqreturn_t mc_event_handler(int irq, void *dev_id) { struct plda_pcie_rp *port = dev_id; struct device *dev = port->dev; struct irq_data *data; data = irq_domain_get_irq_data(port->event_domain, irq); if (event_cause[data->hwirq].str) dev_err_ratelimited(dev, "%s\n", event_cause[data->hwirq].str); else dev_err_ratelimited(dev, "bad event IRQ %ld\n", data->hwirq); return IRQ_HANDLED; } static void mc_ack_event_irq(struct irq_data *data) { struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data); struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda); u32 event = data->hwirq; void __iomem *addr; u32 mask; if (event_descs[event].offset == ISTATUS_LOCAL) addr = mc_port->bridge_base_addr; else addr = mc_port->ctrl_base_addr; addr += event_descs[event].offset; mask = event_descs[event].mask; mask |= event_descs[event].enb_mask; writel_relaxed(mask, addr); } static void mc_mask_event_irq(struct irq_data *data) { struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data); struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda); u32 event = data->hwirq; void __iomem *addr; u32 mask; u32 val; if (event_descs[event].offset == ISTATUS_LOCAL) addr = mc_port->bridge_base_addr; else addr = mc_port->ctrl_base_addr; addr += event_descs[event].mask_offset; mask = event_descs[event].mask; if (event_descs[event].enb_mask) { mask <<= PCIE_EVENT_INT_ENB_SHIFT; mask &= PCIE_EVENT_INT_ENB_MASK; } if (!event_descs[event].mask_high) mask = ~mask; raw_spin_lock(&port->lock); val = readl_relaxed(addr); if (event_descs[event].mask_high) val |= mask; else val &= mask; writel_relaxed(val, addr); raw_spin_unlock(&port->lock); } static void mc_unmask_event_irq(struct irq_data *data) { struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data); struct mc_pcie *mc_port = container_of(port, struct mc_pcie, plda); u32 event = data->hwirq; void __iomem *addr; u32 mask; u32 val; if (event_descs[event].offset == ISTATUS_LOCAL) addr = mc_port->bridge_base_addr; else addr = mc_port->ctrl_base_addr; addr += event_descs[event].mask_offset; mask = event_descs[event].mask; if (event_descs[event].enb_mask) mask <<= PCIE_EVENT_INT_ENB_SHIFT; if (event_descs[event].mask_high) mask = ~mask; if (event_descs[event].enb_mask) mask &= PCIE_EVENT_INT_ENB_MASK; raw_spin_lock(&port->lock); val = readl_relaxed(addr); if (event_descs[event].mask_high) val &= mask; else val |= mask; writel_relaxed(val, addr); raw_spin_unlock(&port->lock); } static struct irq_chip mc_event_irq_chip = { .name = "Microchip PCIe EVENT", .irq_ack = mc_ack_event_irq, .irq_mask = mc_mask_event_irq, .irq_unmask = mc_unmask_event_irq, }; static inline void mc_pcie_deinit_clk(void *data) { struct clk *clk = data; clk_disable_unprepare(clk); } static inline struct clk *mc_pcie_init_clk(struct device *dev, const char *id) { struct clk *clk; int ret; clk = devm_clk_get_optional(dev, id); if (IS_ERR(clk)) return clk; if (!clk) return clk; ret = clk_prepare_enable(clk); if (ret) return ERR_PTR(ret); devm_add_action_or_reset(dev, mc_pcie_deinit_clk, clk); return clk; } static int mc_pcie_init_clks(struct device *dev) { int i; struct clk *fic; /* * PCIe may be clocked via Fabric Interface using between 1 and 4 * clocks. Scan DT for clocks and enable them if present */ for (i = 0; i < ARRAY_SIZE(poss_clks); i++) { fic = mc_pcie_init_clk(dev, poss_clks[i]); if (IS_ERR(fic)) return PTR_ERR(fic); } return 0; } static int mc_request_event_irq(struct plda_pcie_rp *plda, int event_irq, int event) { return devm_request_irq(plda->dev, event_irq, mc_event_handler, 0, event_cause[event].sym, plda); } static const struct plda_event_ops mc_event_ops = { .get_events = mc_get_events, }; static const struct plda_event mc_event = { .request_event_irq = mc_request_event_irq, .intx_event = EVENT_LOCAL_PM_MSI_INT_INTX, .msi_event = EVENT_LOCAL_PM_MSI_INT_MSI, }; static inline void mc_clear_secs(struct mc_pcie *port) { writel_relaxed(SEC_ERROR_INT_ALL_RAM_SEC_ERR_INT, port->ctrl_base_addr + SEC_ERROR_INT); writel_relaxed(0, port->ctrl_base_addr + SEC_ERROR_EVENT_CNT); } static inline void mc_clear_deds(struct mc_pcie *port) { writel_relaxed(DED_ERROR_INT_ALL_RAM_DED_ERR_INT, port->ctrl_base_addr + DED_ERROR_INT); writel_relaxed(0, port->ctrl_base_addr + DED_ERROR_EVENT_CNT); } static void mc_disable_interrupts(struct mc_pcie *port) { u32 val; /* Ensure ECC bypass is enabled */ val = ECC_CONTROL_TX_RAM_ECC_BYPASS | ECC_CONTROL_RX_RAM_ECC_BYPASS | ECC_CONTROL_PCIE2AXI_RAM_ECC_BYPASS | ECC_CONTROL_AXI2PCIE_RAM_ECC_BYPASS; writel_relaxed(val, port->ctrl_base_addr + ECC_CONTROL); /* Disable SEC errors and clear any outstanding */ writel_relaxed(SEC_ERROR_INT_ALL_RAM_SEC_ERR_INT, port->ctrl_base_addr + SEC_ERROR_INT_MASK); mc_clear_secs(port); /* Disable DED errors and clear any outstanding */ writel_relaxed(DED_ERROR_INT_ALL_RAM_DED_ERR_INT, port->ctrl_base_addr + DED_ERROR_INT_MASK); mc_clear_deds(port); /* Disable local interrupts and clear any outstanding */ writel_relaxed(0, port->bridge_base_addr + IMASK_LOCAL); writel_relaxed(GENMASK(31, 0), port->bridge_base_addr + ISTATUS_LOCAL); writel_relaxed(GENMASK(31, 0), port->bridge_base_addr + ISTATUS_MSI); /* Disable PCIe events and clear any outstanding */ val = PCIE_EVENT_INT_L2_EXIT_INT | PCIE_EVENT_INT_HOTRST_EXIT_INT | PCIE_EVENT_INT_DLUP_EXIT_INT | PCIE_EVENT_INT_L2_EXIT_INT_MASK | PCIE_EVENT_INT_HOTRST_EXIT_INT_MASK | PCIE_EVENT_INT_DLUP_EXIT_INT_MASK; writel_relaxed(val, port->ctrl_base_addr + PCIE_EVENT_INT); /* Disable host interrupts and clear any outstanding */ writel_relaxed(0, port->bridge_base_addr + IMASK_HOST); writel_relaxed(GENMASK(31, 0), port->bridge_base_addr + ISTATUS_HOST); } static int mc_platform_init(struct pci_config_window *cfg) { struct device *dev = cfg->parent; struct platform_device *pdev = to_platform_device(dev); struct pci_host_bridge *bridge = platform_get_drvdata(pdev); int ret; /* Configure address translation table 0 for PCIe config space */ plda_pcie_setup_window(port->bridge_base_addr, 0, cfg->res.start, cfg->res.start, resource_size(&cfg->res)); /* Need some fixups in config space */ mc_pcie_enable_msi(port, cfg->win); /* Configure non-config space outbound ranges */ ret = plda_pcie_setup_iomems(bridge, &port->plda); if (ret) return ret; port->plda.event_ops = &mc_event_ops; port->plda.event_irq_chip = &mc_event_irq_chip; port->plda.events_bitmap = GENMASK(NUM_EVENTS - 1, 0); /* Address translation is up; safe to enable interrupts */ ret = plda_init_interrupts(pdev, &port->plda, &mc_event); if (ret) return ret; return 0; } static int mc_host_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; void __iomem *apb_base_addr; struct plda_pcie_rp *plda; int ret; u32 val; port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); if (!port) return -ENOMEM; plda = &port->plda; plda->dev = dev; port->bridge_base_addr = devm_platform_ioremap_resource_byname(pdev, "bridge"); port->ctrl_base_addr = devm_platform_ioremap_resource_byname(pdev, "ctrl"); if (!IS_ERR(port->bridge_base_addr) && !IS_ERR(port->ctrl_base_addr)) goto addrs_set; /* * The original, incorrect, binding that lumped the control and * bridge addresses together still needs to be handled by the driver. */ apb_base_addr = devm_platform_ioremap_resource_byname(pdev, "apb"); if (IS_ERR(apb_base_addr)) return dev_err_probe(dev, PTR_ERR(apb_base_addr), "both legacy apb register and ctrl/bridge regions missing"); port->bridge_base_addr = apb_base_addr + MC_PCIE1_BRIDGE_ADDR; port->ctrl_base_addr = apb_base_addr + MC_PCIE1_CTRL_ADDR; addrs_set: mc_disable_interrupts(port); plda->bridge_addr = port->bridge_base_addr; plda->num_events = NUM_EVENTS; /* Allow enabling MSI by disabling MSI-X */ val = readl(port->bridge_base_addr + PCIE_PCI_IRQ_DW0); val &= ~MSIX_CAP_MASK; writel(val, port->bridge_base_addr + PCIE_PCI_IRQ_DW0); /* Pick num vectors from bitfile programmed onto FPGA fabric */ val = readl(port->bridge_base_addr + PCIE_PCI_IRQ_DW0); val &= NUM_MSI_MSGS_MASK; val >>= NUM_MSI_MSGS_SHIFT; plda->msi.num_vectors = 1 << val; /* Pick vector address from design */ plda->msi.vector_phy = readl_relaxed(port->bridge_base_addr + IMSI_ADDR); ret = mc_pcie_init_clks(dev); if (ret) { dev_err(dev, "failed to get clock resources, error %d\n", ret); return -ENODEV; } return pci_host_common_probe(pdev); } static const struct pci_ecam_ops mc_ecam_ops = { .init = mc_platform_init, .pci_ops = { .map_bus = pci_ecam_map_bus, .read = pci_generic_config_read, .write = pci_generic_config_write, } }; static const struct of_device_id mc_pcie_of_match[] = { { .compatible = "microchip,pcie-host-1.0", .data = &mc_ecam_ops, }, {}, }; MODULE_DEVICE_TABLE(of, mc_pcie_of_match); static struct platform_driver mc_pcie_driver = { .probe = mc_host_probe, .driver = { .name = "microchip-pcie", .of_match_table = mc_pcie_of_match, .suppress_bind_attrs = true, }, }; builtin_platform_driver(mc_pcie_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Microchip PCIe host controller driver"); MODULE_AUTHOR("Daire McNamara ");