1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Microchip AXI PCIe Bridge host controller driver 4 * 5 * Copyright (c) 2018 - 2020 Microchip Corporation. All rights reserved. 6 * 7 * Author: Daire McNamara <daire.mcnamara@microchip.com> 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/irqchip/chained_irq.h> 12 #include <linux/irqdomain.h> 13 #include <linux/module.h> 14 #include <linux/msi.h> 15 #include <linux/of_address.h> 16 #include <linux/of_pci.h> 17 #include <linux/pci-ecam.h> 18 #include <linux/platform_device.h> 19 20 #include "../pci.h" 21 22 /* Number of MSI IRQs */ 23 #define MC_NUM_MSI_IRQS 32 24 #define MC_NUM_MSI_IRQS_CODED 5 25 26 /* PCIe Bridge Phy and Controller Phy offsets */ 27 #define MC_PCIE1_BRIDGE_ADDR 0x00008000u 28 #define MC_PCIE1_CTRL_ADDR 0x0000a000u 29 30 #define MC_PCIE_BRIDGE_ADDR (MC_PCIE1_BRIDGE_ADDR) 31 #define MC_PCIE_CTRL_ADDR (MC_PCIE1_CTRL_ADDR) 32 33 /* PCIe Controller Phy Regs */ 34 #define SEC_ERROR_CNT 0x20 35 #define DED_ERROR_CNT 0x24 36 #define SEC_ERROR_INT 0x28 37 #define SEC_ERROR_INT_TX_RAM_SEC_ERR_INT GENMASK(3, 0) 38 #define SEC_ERROR_INT_RX_RAM_SEC_ERR_INT GENMASK(7, 4) 39 #define SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT GENMASK(11, 8) 40 #define SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT GENMASK(15, 12) 41 #define NUM_SEC_ERROR_INTS (4) 42 #define SEC_ERROR_INT_MASK 0x2c 43 #define DED_ERROR_INT 0x30 44 #define DED_ERROR_INT_TX_RAM_DED_ERR_INT GENMASK(3, 0) 45 #define DED_ERROR_INT_RX_RAM_DED_ERR_INT GENMASK(7, 4) 46 #define DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT GENMASK(11, 8) 47 #define DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT GENMASK(15, 12) 48 #define NUM_DED_ERROR_INTS (4) 49 #define DED_ERROR_INT_MASK 0x34 50 #define ECC_CONTROL 0x38 51 #define ECC_CONTROL_TX_RAM_INJ_ERROR_0 BIT(0) 52 #define ECC_CONTROL_TX_RAM_INJ_ERROR_1 BIT(1) 53 #define ECC_CONTROL_TX_RAM_INJ_ERROR_2 BIT(2) 54 #define ECC_CONTROL_TX_RAM_INJ_ERROR_3 BIT(3) 55 #define ECC_CONTROL_RX_RAM_INJ_ERROR_0 BIT(4) 56 #define ECC_CONTROL_RX_RAM_INJ_ERROR_1 BIT(5) 57 #define ECC_CONTROL_RX_RAM_INJ_ERROR_2 BIT(6) 58 #define ECC_CONTROL_RX_RAM_INJ_ERROR_3 BIT(7) 59 #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_0 BIT(8) 60 #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_1 BIT(9) 61 #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_2 BIT(10) 62 #define ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_3 BIT(11) 63 #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_0 BIT(12) 64 #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_1 BIT(13) 65 #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_2 BIT(14) 66 #define ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_3 BIT(15) 67 #define ECC_CONTROL_TX_RAM_ECC_BYPASS BIT(24) 68 #define ECC_CONTROL_RX_RAM_ECC_BYPASS BIT(25) 69 #define ECC_CONTROL_PCIE2AXI_RAM_ECC_BYPASS BIT(26) 70 #define ECC_CONTROL_AXI2PCIE_RAM_ECC_BYPASS BIT(27) 71 #define LTSSM_STATE 0x5c 72 #define LTSSM_L0_STATE 0x10 73 #define PCIE_EVENT_INT 0x14c 74 #define PCIE_EVENT_INT_L2_EXIT_INT BIT(0) 75 #define PCIE_EVENT_INT_HOTRST_EXIT_INT BIT(1) 76 #define PCIE_EVENT_INT_DLUP_EXIT_INT BIT(2) 77 #define PCIE_EVENT_INT_MASK GENMASK(2, 0) 78 #define PCIE_EVENT_INT_L2_EXIT_INT_MASK BIT(16) 79 #define PCIE_EVENT_INT_HOTRST_EXIT_INT_MASK BIT(17) 80 #define PCIE_EVENT_INT_DLUP_EXIT_INT_MASK BIT(18) 81 #define PCIE_EVENT_INT_ENB_MASK GENMASK(18, 16) 82 #define PCIE_EVENT_INT_ENB_SHIFT 16 83 #define NUM_PCIE_EVENTS (3) 84 85 /* PCIe Bridge Phy Regs */ 86 #define PCIE_PCI_IDS_DW1 0x9c 87 88 /* PCIe Config space MSI capability structure */ 89 #define MC_MSI_CAP_CTRL_OFFSET 0xe0u 90 #define MC_MSI_MAX_Q_AVAIL (MC_NUM_MSI_IRQS_CODED << 1) 91 #define MC_MSI_Q_SIZE (MC_NUM_MSI_IRQS_CODED << 4) 92 93 #define IMASK_LOCAL 0x180 94 #define DMA_END_ENGINE_0_MASK 0x00000000u 95 #define DMA_END_ENGINE_0_SHIFT 0 96 #define DMA_END_ENGINE_1_MASK 0x00000000u 97 #define DMA_END_ENGINE_1_SHIFT 1 98 #define DMA_ERROR_ENGINE_0_MASK 0x00000100u 99 #define DMA_ERROR_ENGINE_0_SHIFT 8 100 #define DMA_ERROR_ENGINE_1_MASK 0x00000200u 101 #define DMA_ERROR_ENGINE_1_SHIFT 9 102 #define A_ATR_EVT_POST_ERR_MASK 0x00010000u 103 #define A_ATR_EVT_POST_ERR_SHIFT 16 104 #define A_ATR_EVT_FETCH_ERR_MASK 0x00020000u 105 #define A_ATR_EVT_FETCH_ERR_SHIFT 17 106 #define A_ATR_EVT_DISCARD_ERR_MASK 0x00040000u 107 #define A_ATR_EVT_DISCARD_ERR_SHIFT 18 108 #define A_ATR_EVT_DOORBELL_MASK 0x00000000u 109 #define A_ATR_EVT_DOORBELL_SHIFT 19 110 #define P_ATR_EVT_POST_ERR_MASK 0x00100000u 111 #define P_ATR_EVT_POST_ERR_SHIFT 20 112 #define P_ATR_EVT_FETCH_ERR_MASK 0x00200000u 113 #define P_ATR_EVT_FETCH_ERR_SHIFT 21 114 #define P_ATR_EVT_DISCARD_ERR_MASK 0x00400000u 115 #define P_ATR_EVT_DISCARD_ERR_SHIFT 22 116 #define P_ATR_EVT_DOORBELL_MASK 0x00000000u 117 #define P_ATR_EVT_DOORBELL_SHIFT 23 118 #define PM_MSI_INT_INTA_MASK 0x01000000u 119 #define PM_MSI_INT_INTA_SHIFT 24 120 #define PM_MSI_INT_INTB_MASK 0x02000000u 121 #define PM_MSI_INT_INTB_SHIFT 25 122 #define PM_MSI_INT_INTC_MASK 0x04000000u 123 #define PM_MSI_INT_INTC_SHIFT 26 124 #define PM_MSI_INT_INTD_MASK 0x08000000u 125 #define PM_MSI_INT_INTD_SHIFT 27 126 #define PM_MSI_INT_INTX_MASK 0x0f000000u 127 #define PM_MSI_INT_INTX_SHIFT 24 128 #define PM_MSI_INT_MSI_MASK 0x10000000u 129 #define PM_MSI_INT_MSI_SHIFT 28 130 #define PM_MSI_INT_AER_EVT_MASK 0x20000000u 131 #define PM_MSI_INT_AER_EVT_SHIFT 29 132 #define PM_MSI_INT_EVENTS_MASK 0x40000000u 133 #define PM_MSI_INT_EVENTS_SHIFT 30 134 #define PM_MSI_INT_SYS_ERR_MASK 0x80000000u 135 #define PM_MSI_INT_SYS_ERR_SHIFT 31 136 #define NUM_LOCAL_EVENTS 15 137 #define ISTATUS_LOCAL 0x184 138 #define IMASK_HOST 0x188 139 #define ISTATUS_HOST 0x18c 140 #define MSI_ADDR 0x190 141 #define ISTATUS_MSI 0x194 142 143 /* PCIe Master table init defines */ 144 #define ATR0_PCIE_WIN0_SRCADDR_PARAM 0x600u 145 #define ATR0_PCIE_ATR_SIZE 0x25 146 #define ATR0_PCIE_ATR_SIZE_SHIFT 1 147 #define ATR0_PCIE_WIN0_SRC_ADDR 0x604u 148 #define ATR0_PCIE_WIN0_TRSL_ADDR_LSB 0x608u 149 #define ATR0_PCIE_WIN0_TRSL_ADDR_UDW 0x60cu 150 #define ATR0_PCIE_WIN0_TRSL_PARAM 0x610u 151 152 /* PCIe AXI slave table init defines */ 153 #define ATR0_AXI4_SLV0_SRCADDR_PARAM 0x800u 154 #define ATR_SIZE_SHIFT 1 155 #define ATR_IMPL_ENABLE 1 156 #define ATR0_AXI4_SLV0_SRC_ADDR 0x804u 157 #define ATR0_AXI4_SLV0_TRSL_ADDR_LSB 0x808u 158 #define ATR0_AXI4_SLV0_TRSL_ADDR_UDW 0x80cu 159 #define ATR0_AXI4_SLV0_TRSL_PARAM 0x810u 160 #define PCIE_TX_RX_INTERFACE 0x00000000u 161 #define PCIE_CONFIG_INTERFACE 0x00000001u 162 163 #define ATR_ENTRY_SIZE 32 164 165 #define EVENT_PCIE_L2_EXIT 0 166 #define EVENT_PCIE_HOTRST_EXIT 1 167 #define EVENT_PCIE_DLUP_EXIT 2 168 #define EVENT_SEC_TX_RAM_SEC_ERR 3 169 #define EVENT_SEC_RX_RAM_SEC_ERR 4 170 #define EVENT_SEC_AXI2PCIE_RAM_SEC_ERR 5 171 #define EVENT_SEC_PCIE2AXI_RAM_SEC_ERR 6 172 #define EVENT_DED_TX_RAM_DED_ERR 7 173 #define EVENT_DED_RX_RAM_DED_ERR 8 174 #define EVENT_DED_AXI2PCIE_RAM_DED_ERR 9 175 #define EVENT_DED_PCIE2AXI_RAM_DED_ERR 10 176 #define EVENT_LOCAL_DMA_END_ENGINE_0 11 177 #define EVENT_LOCAL_DMA_END_ENGINE_1 12 178 #define EVENT_LOCAL_DMA_ERROR_ENGINE_0 13 179 #define EVENT_LOCAL_DMA_ERROR_ENGINE_1 14 180 #define EVENT_LOCAL_A_ATR_EVT_POST_ERR 15 181 #define EVENT_LOCAL_A_ATR_EVT_FETCH_ERR 16 182 #define EVENT_LOCAL_A_ATR_EVT_DISCARD_ERR 17 183 #define EVENT_LOCAL_A_ATR_EVT_DOORBELL 18 184 #define EVENT_LOCAL_P_ATR_EVT_POST_ERR 19 185 #define EVENT_LOCAL_P_ATR_EVT_FETCH_ERR 20 186 #define EVENT_LOCAL_P_ATR_EVT_DISCARD_ERR 21 187 #define EVENT_LOCAL_P_ATR_EVT_DOORBELL 22 188 #define EVENT_LOCAL_PM_MSI_INT_INTX 23 189 #define EVENT_LOCAL_PM_MSI_INT_MSI 24 190 #define EVENT_LOCAL_PM_MSI_INT_AER_EVT 25 191 #define EVENT_LOCAL_PM_MSI_INT_EVENTS 26 192 #define EVENT_LOCAL_PM_MSI_INT_SYS_ERR 27 193 #define NUM_EVENTS 28 194 195 #define PCIE_EVENT_CAUSE(x, s) \ 196 [EVENT_PCIE_ ## x] = { __stringify(x), s } 197 198 #define SEC_ERROR_CAUSE(x, s) \ 199 [EVENT_SEC_ ## x] = { __stringify(x), s } 200 201 #define DED_ERROR_CAUSE(x, s) \ 202 [EVENT_DED_ ## x] = { __stringify(x), s } 203 204 #define LOCAL_EVENT_CAUSE(x, s) \ 205 [EVENT_LOCAL_ ## x] = { __stringify(x), s } 206 207 #define PCIE_EVENT(x) \ 208 .base = MC_PCIE_CTRL_ADDR, \ 209 .offset = PCIE_EVENT_INT, \ 210 .mask_offset = PCIE_EVENT_INT, \ 211 .mask_high = 1, \ 212 .mask = PCIE_EVENT_INT_ ## x ## _INT, \ 213 .enb_mask = PCIE_EVENT_INT_ENB_MASK 214 215 #define SEC_EVENT(x) \ 216 .base = MC_PCIE_CTRL_ADDR, \ 217 .offset = SEC_ERROR_INT, \ 218 .mask_offset = SEC_ERROR_INT_MASK, \ 219 .mask = SEC_ERROR_INT_ ## x ## _INT, \ 220 .mask_high = 1, \ 221 .enb_mask = 0 222 223 #define DED_EVENT(x) \ 224 .base = MC_PCIE_CTRL_ADDR, \ 225 .offset = DED_ERROR_INT, \ 226 .mask_offset = DED_ERROR_INT_MASK, \ 227 .mask_high = 1, \ 228 .mask = DED_ERROR_INT_ ## x ## _INT, \ 229 .enb_mask = 0 230 231 #define LOCAL_EVENT(x) \ 232 .base = MC_PCIE_BRIDGE_ADDR, \ 233 .offset = ISTATUS_LOCAL, \ 234 .mask_offset = IMASK_LOCAL, \ 235 .mask_high = 0, \ 236 .mask = x ## _MASK, \ 237 .enb_mask = 0 238 239 #define PCIE_EVENT_TO_EVENT_MAP(x) \ 240 { PCIE_EVENT_INT_ ## x ## _INT, EVENT_PCIE_ ## x } 241 242 #define SEC_ERROR_TO_EVENT_MAP(x) \ 243 { SEC_ERROR_INT_ ## x ## _INT, EVENT_SEC_ ## x } 244 245 #define DED_ERROR_TO_EVENT_MAP(x) \ 246 { DED_ERROR_INT_ ## x ## _INT, EVENT_DED_ ## x } 247 248 #define LOCAL_STATUS_TO_EVENT_MAP(x) \ 249 { x ## _MASK, EVENT_LOCAL_ ## x } 250 251 struct event_map { 252 u32 reg_mask; 253 u32 event_bit; 254 }; 255 256 struct mc_msi { 257 struct mutex lock; /* Protect used bitmap */ 258 struct irq_domain *msi_domain; 259 struct irq_domain *dev_domain; 260 u32 num_vectors; 261 u64 vector_phy; 262 DECLARE_BITMAP(used, MC_NUM_MSI_IRQS); 263 }; 264 265 struct mc_pcie { 266 void __iomem *axi_base_addr; 267 struct device *dev; 268 struct irq_domain *intx_domain; 269 struct irq_domain *event_domain; 270 raw_spinlock_t lock; 271 struct mc_msi msi; 272 }; 273 274 struct cause { 275 const char *sym; 276 const char *str; 277 }; 278 279 static const struct cause event_cause[NUM_EVENTS] = { 280 PCIE_EVENT_CAUSE(L2_EXIT, "L2 exit event"), 281 PCIE_EVENT_CAUSE(HOTRST_EXIT, "Hot reset exit event"), 282 PCIE_EVENT_CAUSE(DLUP_EXIT, "DLUP exit event"), 283 SEC_ERROR_CAUSE(TX_RAM_SEC_ERR, "sec error in tx buffer"), 284 SEC_ERROR_CAUSE(RX_RAM_SEC_ERR, "sec error in rx buffer"), 285 SEC_ERROR_CAUSE(PCIE2AXI_RAM_SEC_ERR, "sec error in pcie2axi buffer"), 286 SEC_ERROR_CAUSE(AXI2PCIE_RAM_SEC_ERR, "sec error in axi2pcie buffer"), 287 DED_ERROR_CAUSE(TX_RAM_DED_ERR, "ded error in tx buffer"), 288 DED_ERROR_CAUSE(RX_RAM_DED_ERR, "ded error in rx buffer"), 289 DED_ERROR_CAUSE(PCIE2AXI_RAM_DED_ERR, "ded error in pcie2axi buffer"), 290 DED_ERROR_CAUSE(AXI2PCIE_RAM_DED_ERR, "ded error in axi2pcie buffer"), 291 LOCAL_EVENT_CAUSE(DMA_ERROR_ENGINE_0, "dma engine 0 error"), 292 LOCAL_EVENT_CAUSE(DMA_ERROR_ENGINE_1, "dma engine 1 error"), 293 LOCAL_EVENT_CAUSE(A_ATR_EVT_POST_ERR, "axi write request error"), 294 LOCAL_EVENT_CAUSE(A_ATR_EVT_FETCH_ERR, "axi read request error"), 295 LOCAL_EVENT_CAUSE(A_ATR_EVT_DISCARD_ERR, "axi read timeout"), 296 LOCAL_EVENT_CAUSE(P_ATR_EVT_POST_ERR, "pcie write request error"), 297 LOCAL_EVENT_CAUSE(P_ATR_EVT_FETCH_ERR, "pcie read request error"), 298 LOCAL_EVENT_CAUSE(P_ATR_EVT_DISCARD_ERR, "pcie read timeout"), 299 LOCAL_EVENT_CAUSE(PM_MSI_INT_AER_EVT, "aer event"), 300 LOCAL_EVENT_CAUSE(PM_MSI_INT_EVENTS, "pm/ltr/hotplug event"), 301 LOCAL_EVENT_CAUSE(PM_MSI_INT_SYS_ERR, "system error"), 302 }; 303 304 static struct event_map pcie_event_to_event[] = { 305 PCIE_EVENT_TO_EVENT_MAP(L2_EXIT), 306 PCIE_EVENT_TO_EVENT_MAP(HOTRST_EXIT), 307 PCIE_EVENT_TO_EVENT_MAP(DLUP_EXIT), 308 }; 309 310 static struct event_map sec_error_to_event[] = { 311 SEC_ERROR_TO_EVENT_MAP(TX_RAM_SEC_ERR), 312 SEC_ERROR_TO_EVENT_MAP(RX_RAM_SEC_ERR), 313 SEC_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_SEC_ERR), 314 SEC_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_SEC_ERR), 315 }; 316 317 static struct event_map ded_error_to_event[] = { 318 DED_ERROR_TO_EVENT_MAP(TX_RAM_DED_ERR), 319 DED_ERROR_TO_EVENT_MAP(RX_RAM_DED_ERR), 320 DED_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_DED_ERR), 321 DED_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_DED_ERR), 322 }; 323 324 static struct event_map local_status_to_event[] = { 325 LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_0), 326 LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_1), 327 LOCAL_STATUS_TO_EVENT_MAP(DMA_ERROR_ENGINE_0), 328 LOCAL_STATUS_TO_EVENT_MAP(DMA_ERROR_ENGINE_1), 329 LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_POST_ERR), 330 LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_FETCH_ERR), 331 LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_DISCARD_ERR), 332 LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_DOORBELL), 333 LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_POST_ERR), 334 LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_FETCH_ERR), 335 LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_DISCARD_ERR), 336 LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_DOORBELL), 337 LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_INTX), 338 LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_MSI), 339 LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_AER_EVT), 340 LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_EVENTS), 341 LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_SYS_ERR), 342 }; 343 344 static struct { 345 u32 base; 346 u32 offset; 347 u32 mask; 348 u32 shift; 349 u32 enb_mask; 350 u32 mask_high; 351 u32 mask_offset; 352 } event_descs[] = { 353 { PCIE_EVENT(L2_EXIT) }, 354 { PCIE_EVENT(HOTRST_EXIT) }, 355 { PCIE_EVENT(DLUP_EXIT) }, 356 { SEC_EVENT(TX_RAM_SEC_ERR) }, 357 { SEC_EVENT(RX_RAM_SEC_ERR) }, 358 { SEC_EVENT(PCIE2AXI_RAM_SEC_ERR) }, 359 { SEC_EVENT(AXI2PCIE_RAM_SEC_ERR) }, 360 { DED_EVENT(TX_RAM_DED_ERR) }, 361 { DED_EVENT(RX_RAM_DED_ERR) }, 362 { DED_EVENT(PCIE2AXI_RAM_DED_ERR) }, 363 { DED_EVENT(AXI2PCIE_RAM_DED_ERR) }, 364 { LOCAL_EVENT(DMA_END_ENGINE_0) }, 365 { LOCAL_EVENT(DMA_END_ENGINE_1) }, 366 { LOCAL_EVENT(DMA_ERROR_ENGINE_0) }, 367 { LOCAL_EVENT(DMA_ERROR_ENGINE_1) }, 368 { LOCAL_EVENT(A_ATR_EVT_POST_ERR) }, 369 { LOCAL_EVENT(A_ATR_EVT_FETCH_ERR) }, 370 { LOCAL_EVENT(A_ATR_EVT_DISCARD_ERR) }, 371 { LOCAL_EVENT(A_ATR_EVT_DOORBELL) }, 372 { LOCAL_EVENT(P_ATR_EVT_POST_ERR) }, 373 { LOCAL_EVENT(P_ATR_EVT_FETCH_ERR) }, 374 { LOCAL_EVENT(P_ATR_EVT_DISCARD_ERR) }, 375 { LOCAL_EVENT(P_ATR_EVT_DOORBELL) }, 376 { LOCAL_EVENT(PM_MSI_INT_INTX) }, 377 { LOCAL_EVENT(PM_MSI_INT_MSI) }, 378 { LOCAL_EVENT(PM_MSI_INT_AER_EVT) }, 379 { LOCAL_EVENT(PM_MSI_INT_EVENTS) }, 380 { LOCAL_EVENT(PM_MSI_INT_SYS_ERR) }, 381 }; 382 383 static char poss_clks[][5] = { "fic0", "fic1", "fic2", "fic3" }; 384 385 static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *base) 386 { 387 struct mc_msi *msi = &port->msi; 388 u32 cap_offset = MC_MSI_CAP_CTRL_OFFSET; 389 u16 msg_ctrl = readw_relaxed(base + cap_offset + PCI_MSI_FLAGS); 390 391 msg_ctrl |= PCI_MSI_FLAGS_ENABLE; 392 msg_ctrl &= ~PCI_MSI_FLAGS_QMASK; 393 msg_ctrl |= MC_MSI_MAX_Q_AVAIL; 394 msg_ctrl &= ~PCI_MSI_FLAGS_QSIZE; 395 msg_ctrl |= MC_MSI_Q_SIZE; 396 msg_ctrl |= PCI_MSI_FLAGS_64BIT; 397 398 writew_relaxed(msg_ctrl, base + cap_offset + PCI_MSI_FLAGS); 399 400 writel_relaxed(lower_32_bits(msi->vector_phy), 401 base + cap_offset + PCI_MSI_ADDRESS_LO); 402 writel_relaxed(upper_32_bits(msi->vector_phy), 403 base + cap_offset + PCI_MSI_ADDRESS_HI); 404 } 405 406 static void mc_handle_msi(struct irq_desc *desc) 407 { 408 struct mc_pcie *port = irq_desc_get_handler_data(desc); 409 struct irq_chip *chip = irq_desc_get_chip(desc); 410 struct device *dev = port->dev; 411 struct mc_msi *msi = &port->msi; 412 void __iomem *bridge_base_addr = 413 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 414 unsigned long status; 415 u32 bit; 416 int ret; 417 418 chained_irq_enter(chip, desc); 419 420 status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL); 421 if (status & PM_MSI_INT_MSI_MASK) { 422 writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL); 423 status = readl_relaxed(bridge_base_addr + ISTATUS_MSI); 424 for_each_set_bit(bit, &status, msi->num_vectors) { 425 ret = generic_handle_domain_irq(msi->dev_domain, bit); 426 if (ret) 427 dev_err_ratelimited(dev, "bad MSI IRQ %d\n", 428 bit); 429 } 430 } 431 432 chained_irq_exit(chip, desc); 433 } 434 435 static void mc_msi_bottom_irq_ack(struct irq_data *data) 436 { 437 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 438 void __iomem *bridge_base_addr = 439 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 440 u32 bitpos = data->hwirq; 441 442 writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI); 443 } 444 445 static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) 446 { 447 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 448 phys_addr_t addr = port->msi.vector_phy; 449 450 msg->address_lo = lower_32_bits(addr); 451 msg->address_hi = upper_32_bits(addr); 452 msg->data = data->hwirq; 453 454 dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n", 455 (int)data->hwirq, msg->address_hi, msg->address_lo); 456 } 457 458 static int mc_msi_set_affinity(struct irq_data *irq_data, 459 const struct cpumask *mask, bool force) 460 { 461 return -EINVAL; 462 } 463 464 static struct irq_chip mc_msi_bottom_irq_chip = { 465 .name = "Microchip MSI", 466 .irq_ack = mc_msi_bottom_irq_ack, 467 .irq_compose_msi_msg = mc_compose_msi_msg, 468 .irq_set_affinity = mc_msi_set_affinity, 469 }; 470 471 static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq, 472 unsigned int nr_irqs, void *args) 473 { 474 struct mc_pcie *port = domain->host_data; 475 struct mc_msi *msi = &port->msi; 476 void __iomem *bridge_base_addr = 477 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 478 unsigned long bit; 479 u32 val; 480 481 mutex_lock(&msi->lock); 482 bit = find_first_zero_bit(msi->used, msi->num_vectors); 483 if (bit >= msi->num_vectors) { 484 mutex_unlock(&msi->lock); 485 return -ENOSPC; 486 } 487 488 set_bit(bit, msi->used); 489 490 irq_domain_set_info(domain, virq, bit, &mc_msi_bottom_irq_chip, 491 domain->host_data, handle_edge_irq, NULL, NULL); 492 493 /* Enable MSI interrupts */ 494 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL); 495 val |= PM_MSI_INT_MSI_MASK; 496 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL); 497 498 mutex_unlock(&msi->lock); 499 500 return 0; 501 } 502 503 static void mc_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq, 504 unsigned int nr_irqs) 505 { 506 struct irq_data *d = irq_domain_get_irq_data(domain, virq); 507 struct mc_pcie *port = irq_data_get_irq_chip_data(d); 508 struct mc_msi *msi = &port->msi; 509 510 mutex_lock(&msi->lock); 511 512 if (test_bit(d->hwirq, msi->used)) 513 __clear_bit(d->hwirq, msi->used); 514 else 515 dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq); 516 517 mutex_unlock(&msi->lock); 518 } 519 520 static const struct irq_domain_ops msi_domain_ops = { 521 .alloc = mc_irq_msi_domain_alloc, 522 .free = mc_irq_msi_domain_free, 523 }; 524 525 static struct irq_chip mc_msi_irq_chip = { 526 .name = "Microchip PCIe MSI", 527 .irq_ack = irq_chip_ack_parent, 528 .irq_mask = pci_msi_mask_irq, 529 .irq_unmask = pci_msi_unmask_irq, 530 }; 531 532 static struct msi_domain_info mc_msi_domain_info = { 533 .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | 534 MSI_FLAG_PCI_MSIX), 535 .chip = &mc_msi_irq_chip, 536 }; 537 538 static int mc_allocate_msi_domains(struct mc_pcie *port) 539 { 540 struct device *dev = port->dev; 541 struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node); 542 struct mc_msi *msi = &port->msi; 543 544 mutex_init(&port->msi.lock); 545 546 msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors, 547 &msi_domain_ops, port); 548 if (!msi->dev_domain) { 549 dev_err(dev, "failed to create IRQ domain\n"); 550 return -ENOMEM; 551 } 552 553 msi->msi_domain = pci_msi_create_irq_domain(fwnode, &mc_msi_domain_info, 554 msi->dev_domain); 555 if (!msi->msi_domain) { 556 dev_err(dev, "failed to create MSI domain\n"); 557 irq_domain_remove(msi->dev_domain); 558 return -ENOMEM; 559 } 560 561 return 0; 562 } 563 564 static void mc_handle_intx(struct irq_desc *desc) 565 { 566 struct mc_pcie *port = irq_desc_get_handler_data(desc); 567 struct irq_chip *chip = irq_desc_get_chip(desc); 568 struct device *dev = port->dev; 569 void __iomem *bridge_base_addr = 570 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 571 unsigned long status; 572 u32 bit; 573 int ret; 574 575 chained_irq_enter(chip, desc); 576 577 status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL); 578 if (status & PM_MSI_INT_INTX_MASK) { 579 status &= PM_MSI_INT_INTX_MASK; 580 status >>= PM_MSI_INT_INTX_SHIFT; 581 for_each_set_bit(bit, &status, PCI_NUM_INTX) { 582 ret = generic_handle_domain_irq(port->intx_domain, bit); 583 if (ret) 584 dev_err_ratelimited(dev, "bad INTx IRQ %d\n", 585 bit); 586 } 587 } 588 589 chained_irq_exit(chip, desc); 590 } 591 592 static void mc_ack_intx_irq(struct irq_data *data) 593 { 594 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 595 void __iomem *bridge_base_addr = 596 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 597 u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT); 598 599 writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL); 600 } 601 602 static void mc_mask_intx_irq(struct irq_data *data) 603 { 604 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 605 void __iomem *bridge_base_addr = 606 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 607 unsigned long flags; 608 u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT); 609 u32 val; 610 611 raw_spin_lock_irqsave(&port->lock, flags); 612 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL); 613 val &= ~mask; 614 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL); 615 raw_spin_unlock_irqrestore(&port->lock, flags); 616 } 617 618 static void mc_unmask_intx_irq(struct irq_data *data) 619 { 620 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 621 void __iomem *bridge_base_addr = 622 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 623 unsigned long flags; 624 u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT); 625 u32 val; 626 627 raw_spin_lock_irqsave(&port->lock, flags); 628 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL); 629 val |= mask; 630 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL); 631 raw_spin_unlock_irqrestore(&port->lock, flags); 632 } 633 634 static struct irq_chip mc_intx_irq_chip = { 635 .name = "Microchip PCIe INTx", 636 .irq_ack = mc_ack_intx_irq, 637 .irq_mask = mc_mask_intx_irq, 638 .irq_unmask = mc_unmask_intx_irq, 639 }; 640 641 static int mc_pcie_intx_map(struct irq_domain *domain, unsigned int irq, 642 irq_hw_number_t hwirq) 643 { 644 irq_set_chip_and_handler(irq, &mc_intx_irq_chip, handle_level_irq); 645 irq_set_chip_data(irq, domain->host_data); 646 647 return 0; 648 } 649 650 static const struct irq_domain_ops intx_domain_ops = { 651 .map = mc_pcie_intx_map, 652 }; 653 654 static inline u32 reg_to_event(u32 reg, struct event_map field) 655 { 656 return (reg & field.reg_mask) ? BIT(field.event_bit) : 0; 657 } 658 659 static u32 pcie_events(void __iomem *addr) 660 { 661 u32 reg = readl_relaxed(addr); 662 u32 val = 0; 663 int i; 664 665 for (i = 0; i < ARRAY_SIZE(pcie_event_to_event); i++) 666 val |= reg_to_event(reg, pcie_event_to_event[i]); 667 668 return val; 669 } 670 671 static u32 sec_errors(void __iomem *addr) 672 { 673 u32 reg = readl_relaxed(addr); 674 u32 val = 0; 675 int i; 676 677 for (i = 0; i < ARRAY_SIZE(sec_error_to_event); i++) 678 val |= reg_to_event(reg, sec_error_to_event[i]); 679 680 return val; 681 } 682 683 static u32 ded_errors(void __iomem *addr) 684 { 685 u32 reg = readl_relaxed(addr); 686 u32 val = 0; 687 int i; 688 689 for (i = 0; i < ARRAY_SIZE(ded_error_to_event); i++) 690 val |= reg_to_event(reg, ded_error_to_event[i]); 691 692 return val; 693 } 694 695 static u32 local_events(void __iomem *addr) 696 { 697 u32 reg = readl_relaxed(addr); 698 u32 val = 0; 699 int i; 700 701 for (i = 0; i < ARRAY_SIZE(local_status_to_event); i++) 702 val |= reg_to_event(reg, local_status_to_event[i]); 703 704 return val; 705 } 706 707 static u32 get_events(struct mc_pcie *port) 708 { 709 void __iomem *bridge_base_addr = 710 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 711 void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; 712 u32 events = 0; 713 714 events |= pcie_events(ctrl_base_addr + PCIE_EVENT_INT); 715 events |= sec_errors(ctrl_base_addr + SEC_ERROR_INT); 716 events |= ded_errors(ctrl_base_addr + DED_ERROR_INT); 717 events |= local_events(bridge_base_addr + ISTATUS_LOCAL); 718 719 return events; 720 } 721 722 static irqreturn_t mc_event_handler(int irq, void *dev_id) 723 { 724 struct mc_pcie *port = dev_id; 725 struct device *dev = port->dev; 726 struct irq_data *data; 727 728 data = irq_domain_get_irq_data(port->event_domain, irq); 729 730 if (event_cause[data->hwirq].str) 731 dev_err_ratelimited(dev, "%s\n", event_cause[data->hwirq].str); 732 else 733 dev_err_ratelimited(dev, "bad event IRQ %ld\n", data->hwirq); 734 735 return IRQ_HANDLED; 736 } 737 738 static void mc_handle_event(struct irq_desc *desc) 739 { 740 struct mc_pcie *port = irq_desc_get_handler_data(desc); 741 unsigned long events; 742 u32 bit; 743 struct irq_chip *chip = irq_desc_get_chip(desc); 744 745 chained_irq_enter(chip, desc); 746 747 events = get_events(port); 748 749 for_each_set_bit(bit, &events, NUM_EVENTS) 750 generic_handle_domain_irq(port->event_domain, bit); 751 752 chained_irq_exit(chip, desc); 753 } 754 755 static void mc_ack_event_irq(struct irq_data *data) 756 { 757 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 758 u32 event = data->hwirq; 759 void __iomem *addr; 760 u32 mask; 761 762 addr = port->axi_base_addr + event_descs[event].base + 763 event_descs[event].offset; 764 mask = event_descs[event].mask; 765 mask |= event_descs[event].enb_mask; 766 767 writel_relaxed(mask, addr); 768 } 769 770 static void mc_mask_event_irq(struct irq_data *data) 771 { 772 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 773 u32 event = data->hwirq; 774 void __iomem *addr; 775 u32 mask; 776 u32 val; 777 778 addr = port->axi_base_addr + event_descs[event].base + 779 event_descs[event].mask_offset; 780 mask = event_descs[event].mask; 781 if (event_descs[event].enb_mask) { 782 mask <<= PCIE_EVENT_INT_ENB_SHIFT; 783 mask &= PCIE_EVENT_INT_ENB_MASK; 784 } 785 786 if (!event_descs[event].mask_high) 787 mask = ~mask; 788 789 raw_spin_lock(&port->lock); 790 val = readl_relaxed(addr); 791 if (event_descs[event].mask_high) 792 val |= mask; 793 else 794 val &= mask; 795 796 writel_relaxed(val, addr); 797 raw_spin_unlock(&port->lock); 798 } 799 800 static void mc_unmask_event_irq(struct irq_data *data) 801 { 802 struct mc_pcie *port = irq_data_get_irq_chip_data(data); 803 u32 event = data->hwirq; 804 void __iomem *addr; 805 u32 mask; 806 u32 val; 807 808 addr = port->axi_base_addr + event_descs[event].base + 809 event_descs[event].mask_offset; 810 mask = event_descs[event].mask; 811 812 if (event_descs[event].enb_mask) 813 mask <<= PCIE_EVENT_INT_ENB_SHIFT; 814 815 if (event_descs[event].mask_high) 816 mask = ~mask; 817 818 if (event_descs[event].enb_mask) 819 mask &= PCIE_EVENT_INT_ENB_MASK; 820 821 raw_spin_lock(&port->lock); 822 val = readl_relaxed(addr); 823 if (event_descs[event].mask_high) 824 val &= mask; 825 else 826 val |= mask; 827 writel_relaxed(val, addr); 828 raw_spin_unlock(&port->lock); 829 } 830 831 static struct irq_chip mc_event_irq_chip = { 832 .name = "Microchip PCIe EVENT", 833 .irq_ack = mc_ack_event_irq, 834 .irq_mask = mc_mask_event_irq, 835 .irq_unmask = mc_unmask_event_irq, 836 }; 837 838 static int mc_pcie_event_map(struct irq_domain *domain, unsigned int irq, 839 irq_hw_number_t hwirq) 840 { 841 irq_set_chip_and_handler(irq, &mc_event_irq_chip, handle_level_irq); 842 irq_set_chip_data(irq, domain->host_data); 843 844 return 0; 845 } 846 847 static const struct irq_domain_ops event_domain_ops = { 848 .map = mc_pcie_event_map, 849 }; 850 851 static inline struct clk *mc_pcie_init_clk(struct device *dev, const char *id) 852 { 853 struct clk *clk; 854 int ret; 855 856 clk = devm_clk_get_optional(dev, id); 857 if (IS_ERR(clk)) 858 return clk; 859 if (!clk) 860 return clk; 861 862 ret = clk_prepare_enable(clk); 863 if (ret) 864 return ERR_PTR(ret); 865 866 devm_add_action_or_reset(dev, (void (*) (void *))clk_disable_unprepare, 867 clk); 868 869 return clk; 870 } 871 872 static int mc_pcie_init_clks(struct device *dev) 873 { 874 int i; 875 struct clk *fic; 876 877 /* 878 * PCIe may be clocked via Fabric Interface using between 1 and 4 879 * clocks. Scan DT for clocks and enable them if present 880 */ 881 for (i = 0; i < ARRAY_SIZE(poss_clks); i++) { 882 fic = mc_pcie_init_clk(dev, poss_clks[i]); 883 if (IS_ERR(fic)) 884 return PTR_ERR(fic); 885 } 886 887 return 0; 888 } 889 890 static int mc_pcie_init_irq_domains(struct mc_pcie *port) 891 { 892 struct device *dev = port->dev; 893 struct device_node *node = dev->of_node; 894 struct device_node *pcie_intc_node; 895 896 /* Setup INTx */ 897 pcie_intc_node = of_get_next_child(node, NULL); 898 if (!pcie_intc_node) { 899 dev_err(dev, "failed to find PCIe Intc node\n"); 900 return -EINVAL; 901 } 902 903 port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS, 904 &event_domain_ops, port); 905 if (!port->event_domain) { 906 dev_err(dev, "failed to get event domain\n"); 907 of_node_put(pcie_intc_node); 908 return -ENOMEM; 909 } 910 911 irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS); 912 913 port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX, 914 &intx_domain_ops, port); 915 if (!port->intx_domain) { 916 dev_err(dev, "failed to get an INTx IRQ domain\n"); 917 of_node_put(pcie_intc_node); 918 return -ENOMEM; 919 } 920 921 irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED); 922 923 of_node_put(pcie_intc_node); 924 raw_spin_lock_init(&port->lock); 925 926 return mc_allocate_msi_domains(port); 927 } 928 929 static void mc_pcie_setup_window(void __iomem *bridge_base_addr, u32 index, 930 phys_addr_t axi_addr, phys_addr_t pci_addr, 931 size_t size) 932 { 933 u32 atr_sz = ilog2(size) - 1; 934 u32 val; 935 936 if (index == 0) 937 val = PCIE_CONFIG_INTERFACE; 938 else 939 val = PCIE_TX_RX_INTERFACE; 940 941 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + 942 ATR0_AXI4_SLV0_TRSL_PARAM); 943 944 val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) | 945 ATR_IMPL_ENABLE; 946 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + 947 ATR0_AXI4_SLV0_SRCADDR_PARAM); 948 949 val = upper_32_bits(axi_addr); 950 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + 951 ATR0_AXI4_SLV0_SRC_ADDR); 952 953 val = lower_32_bits(pci_addr); 954 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + 955 ATR0_AXI4_SLV0_TRSL_ADDR_LSB); 956 957 val = upper_32_bits(pci_addr); 958 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) + 959 ATR0_AXI4_SLV0_TRSL_ADDR_UDW); 960 961 val = readl(bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM); 962 val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT); 963 writel(val, bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM); 964 writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR); 965 } 966 967 static int mc_pcie_setup_windows(struct platform_device *pdev, 968 struct mc_pcie *port) 969 { 970 void __iomem *bridge_base_addr = 971 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 972 struct pci_host_bridge *bridge = platform_get_drvdata(pdev); 973 struct resource_entry *entry; 974 u64 pci_addr; 975 u32 index = 1; 976 977 resource_list_for_each_entry(entry, &bridge->windows) { 978 if (resource_type(entry->res) == IORESOURCE_MEM) { 979 pci_addr = entry->res->start - entry->offset; 980 mc_pcie_setup_window(bridge_base_addr, index, 981 entry->res->start, pci_addr, 982 resource_size(entry->res)); 983 index++; 984 } 985 } 986 987 return 0; 988 } 989 990 static int mc_platform_init(struct pci_config_window *cfg) 991 { 992 struct device *dev = cfg->parent; 993 struct platform_device *pdev = to_platform_device(dev); 994 struct mc_pcie *port; 995 void __iomem *bridge_base_addr; 996 void __iomem *ctrl_base_addr; 997 int ret; 998 int irq; 999 int i, intx_irq, msi_irq, event_irq; 1000 u32 val; 1001 int err; 1002 1003 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); 1004 if (!port) 1005 return -ENOMEM; 1006 port->dev = dev; 1007 1008 ret = mc_pcie_init_clks(dev); 1009 if (ret) { 1010 dev_err(dev, "failed to get clock resources, error %d\n", ret); 1011 return -ENODEV; 1012 } 1013 1014 port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); 1015 if (IS_ERR(port->axi_base_addr)) 1016 return PTR_ERR(port->axi_base_addr); 1017 1018 bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; 1019 ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; 1020 1021 port->msi.vector_phy = MSI_ADDR; 1022 port->msi.num_vectors = MC_NUM_MSI_IRQS; 1023 ret = mc_pcie_init_irq_domains(port); 1024 if (ret) { 1025 dev_err(dev, "failed creating IRQ domains\n"); 1026 return ret; 1027 } 1028 1029 irq = platform_get_irq(pdev, 0); 1030 if (irq < 0) 1031 return -ENODEV; 1032 1033 for (i = 0; i < NUM_EVENTS; i++) { 1034 event_irq = irq_create_mapping(port->event_domain, i); 1035 if (!event_irq) { 1036 dev_err(dev, "failed to map hwirq %d\n", i); 1037 return -ENXIO; 1038 } 1039 1040 err = devm_request_irq(dev, event_irq, mc_event_handler, 1041 0, event_cause[i].sym, port); 1042 if (err) { 1043 dev_err(dev, "failed to request IRQ %d\n", event_irq); 1044 return err; 1045 } 1046 } 1047 1048 intx_irq = irq_create_mapping(port->event_domain, 1049 EVENT_LOCAL_PM_MSI_INT_INTX); 1050 if (!intx_irq) { 1051 dev_err(dev, "failed to map INTx interrupt\n"); 1052 return -ENXIO; 1053 } 1054 1055 /* Plug the INTx chained handler */ 1056 irq_set_chained_handler_and_data(intx_irq, mc_handle_intx, port); 1057 1058 msi_irq = irq_create_mapping(port->event_domain, 1059 EVENT_LOCAL_PM_MSI_INT_MSI); 1060 if (!msi_irq) 1061 return -ENXIO; 1062 1063 /* Plug the MSI chained handler */ 1064 irq_set_chained_handler_and_data(msi_irq, mc_handle_msi, port); 1065 1066 /* Plug the main event chained handler */ 1067 irq_set_chained_handler_and_data(irq, mc_handle_event, port); 1068 1069 /* Hardware doesn't setup MSI by default */ 1070 mc_pcie_enable_msi(port, cfg->win); 1071 1072 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL); 1073 val |= PM_MSI_INT_INTX_MASK; 1074 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL); 1075 1076 writel_relaxed(val, ctrl_base_addr + ECC_CONTROL); 1077 1078 val = PCIE_EVENT_INT_L2_EXIT_INT | 1079 PCIE_EVENT_INT_HOTRST_EXIT_INT | 1080 PCIE_EVENT_INT_DLUP_EXIT_INT; 1081 writel_relaxed(val, ctrl_base_addr + PCIE_EVENT_INT); 1082 1083 val = SEC_ERROR_INT_TX_RAM_SEC_ERR_INT | 1084 SEC_ERROR_INT_RX_RAM_SEC_ERR_INT | 1085 SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT | 1086 SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT; 1087 writel_relaxed(val, ctrl_base_addr + SEC_ERROR_INT); 1088 writel_relaxed(0, ctrl_base_addr + SEC_ERROR_INT_MASK); 1089 writel_relaxed(0, ctrl_base_addr + SEC_ERROR_CNT); 1090 1091 val = DED_ERROR_INT_TX_RAM_DED_ERR_INT | 1092 DED_ERROR_INT_RX_RAM_DED_ERR_INT | 1093 DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT | 1094 DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT; 1095 writel_relaxed(val, ctrl_base_addr + DED_ERROR_INT); 1096 writel_relaxed(0, ctrl_base_addr + DED_ERROR_INT_MASK); 1097 writel_relaxed(0, ctrl_base_addr + DED_ERROR_CNT); 1098 1099 writel_relaxed(0, bridge_base_addr + IMASK_HOST); 1100 writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST); 1101 1102 /* Configure Address Translation Table 0 for PCIe config space */ 1103 mc_pcie_setup_window(bridge_base_addr, 0, cfg->res.start & 0xffffffff, 1104 cfg->res.start, resource_size(&cfg->res)); 1105 1106 return mc_pcie_setup_windows(pdev, port); 1107 } 1108 1109 static const struct pci_ecam_ops mc_ecam_ops = { 1110 .init = mc_platform_init, 1111 .pci_ops = { 1112 .map_bus = pci_ecam_map_bus, 1113 .read = pci_generic_config_read, 1114 .write = pci_generic_config_write, 1115 } 1116 }; 1117 1118 static const struct of_device_id mc_pcie_of_match[] = { 1119 { 1120 .compatible = "microchip,pcie-host-1.0", 1121 .data = &mc_ecam_ops, 1122 }, 1123 {}, 1124 }; 1125 1126 MODULE_DEVICE_TABLE(of, mc_pcie_of_match); 1127 1128 static struct platform_driver mc_pcie_driver = { 1129 .probe = pci_host_common_probe, 1130 .driver = { 1131 .name = "microchip-pcie", 1132 .of_match_table = mc_pcie_of_match, 1133 .suppress_bind_attrs = true, 1134 }, 1135 }; 1136 1137 builtin_platform_driver(mc_pcie_driver); 1138 MODULE_DESCRIPTION("Microchip PCIe host controller driver"); 1139 MODULE_AUTHOR("Daire McNamara <daire.mcnamara@microchip.com>"); 1140