Minghuan Lian | da41902 | 2014-10-31 13:43:44 +0800 | [diff] [blame] | 1 | /* |
Minghuan Lian | e4e8cb7 | 2015-01-21 17:29:20 +0800 | [diff] [blame] | 2 | * Copyright 2014-2015 Freescale Semiconductor, Inc. |
Minghuan Lian | da41902 | 2014-10-31 13:43:44 +0800 | [diff] [blame] | 3 | * Layerscape PCIe driver |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <asm/arch/fsl_serdes.h> |
| 10 | #include <pci.h> |
| 11 | #include <asm/io.h> |
Minghuan Lian | e4e8cb7 | 2015-01-21 17:29:20 +0800 | [diff] [blame] | 12 | #include <errno.h> |
| 13 | #include <malloc.h> |
Minghuan Lian | 80afc63 | 2016-12-13 14:54:17 +0800 | [diff] [blame] | 14 | #include <dm.h> |
Hou Zhiqiang | a7294ab | 2016-12-13 14:54:16 +0800 | [diff] [blame] | 15 | #include "pcie_layerscape.h" |
Minghuan Lian | e4e8cb7 | 2015-01-21 17:29:20 +0800 | [diff] [blame] | 16 | |
Minghuan Lian | 80afc63 | 2016-12-13 14:54:17 +0800 | [diff] [blame] | 17 | DECLARE_GLOBAL_DATA_PTR; |
| 18 | |
Minghuan Lian | 80afc63 | 2016-12-13 14:54:17 +0800 | [diff] [blame] | 19 | LIST_HEAD(ls_pcie_list); |
| 20 | |
| 21 | static unsigned int dbi_readl(struct ls_pcie *pcie, unsigned int offset) |
| 22 | { |
| 23 | return in_le32(pcie->dbi + offset); |
| 24 | } |
| 25 | |
| 26 | static void dbi_writel(struct ls_pcie *pcie, unsigned int value, |
| 27 | unsigned int offset) |
| 28 | { |
| 29 | out_le32(pcie->dbi + offset, value); |
| 30 | } |
| 31 | |
| 32 | static unsigned int ctrl_readl(struct ls_pcie *pcie, unsigned int offset) |
| 33 | { |
| 34 | if (pcie->big_endian) |
| 35 | return in_be32(pcie->ctrl + offset); |
| 36 | else |
| 37 | return in_le32(pcie->ctrl + offset); |
| 38 | } |
| 39 | |
| 40 | static void ctrl_writel(struct ls_pcie *pcie, unsigned int value, |
| 41 | unsigned int offset) |
| 42 | { |
| 43 | if (pcie->big_endian) |
| 44 | out_be32(pcie->ctrl + offset, value); |
| 45 | else |
| 46 | out_le32(pcie->ctrl + offset, value); |
| 47 | } |
| 48 | |
| 49 | static int ls_pcie_ltssm(struct ls_pcie *pcie) |
| 50 | { |
| 51 | u32 state; |
| 52 | uint svr; |
| 53 | |
| 54 | svr = get_svr(); |
| 55 | if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { |
| 56 | state = ctrl_readl(pcie, LS1021_PEXMSCPORTSR(pcie->idx)); |
| 57 | state = (state >> LS1021_LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK; |
| 58 | } else { |
| 59 | state = ctrl_readl(pcie, PCIE_PF_DBG) & LTSSM_STATE_MASK; |
| 60 | } |
| 61 | |
| 62 | return state; |
| 63 | } |
| 64 | |
| 65 | static int ls_pcie_link_up(struct ls_pcie *pcie) |
| 66 | { |
| 67 | int ltssm; |
| 68 | |
| 69 | ltssm = ls_pcie_ltssm(pcie); |
| 70 | if (ltssm < LTSSM_PCIE_L0) |
| 71 | return 0; |
| 72 | |
| 73 | return 1; |
| 74 | } |
| 75 | |
| 76 | static void ls_pcie_cfg0_set_busdev(struct ls_pcie *pcie, u32 busdev) |
| 77 | { |
| 78 | dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0, |
| 79 | PCIE_ATU_VIEWPORT); |
| 80 | dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); |
| 81 | } |
| 82 | |
| 83 | static void ls_pcie_cfg1_set_busdev(struct ls_pcie *pcie, u32 busdev) |
| 84 | { |
| 85 | dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1, |
| 86 | PCIE_ATU_VIEWPORT); |
| 87 | dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); |
| 88 | } |
| 89 | |
| 90 | static void ls_pcie_atu_outbound_set(struct ls_pcie *pcie, int idx, int type, |
| 91 | u64 phys, u64 bus_addr, pci_size_t size) |
| 92 | { |
| 93 | dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | idx, PCIE_ATU_VIEWPORT); |
| 94 | dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_BASE); |
| 95 | dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_BASE); |
| 96 | dbi_writel(pcie, (u32)phys + size - 1, PCIE_ATU_LIMIT); |
| 97 | dbi_writel(pcie, (u32)bus_addr, PCIE_ATU_LOWER_TARGET); |
| 98 | dbi_writel(pcie, bus_addr >> 32, PCIE_ATU_UPPER_TARGET); |
| 99 | dbi_writel(pcie, type, PCIE_ATU_CR1); |
| 100 | dbi_writel(pcie, PCIE_ATU_ENABLE, PCIE_ATU_CR2); |
| 101 | } |
| 102 | |
| 103 | /* Use bar match mode and MEM type as default */ |
| 104 | static void ls_pcie_atu_inbound_set(struct ls_pcie *pcie, int idx, |
| 105 | int bar, u64 phys) |
| 106 | { |
| 107 | dbi_writel(pcie, PCIE_ATU_REGION_INBOUND | idx, PCIE_ATU_VIEWPORT); |
| 108 | dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_TARGET); |
| 109 | dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_TARGET); |
| 110 | dbi_writel(pcie, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1); |
| 111 | dbi_writel(pcie, PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE | |
| 112 | PCIE_ATU_BAR_NUM(bar), PCIE_ATU_CR2); |
| 113 | } |
| 114 | |
| 115 | static void ls_pcie_dump_atu(struct ls_pcie *pcie) |
| 116 | { |
| 117 | int i; |
| 118 | |
| 119 | for (i = 0; i < PCIE_ATU_REGION_NUM; i++) { |
| 120 | dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | i, |
| 121 | PCIE_ATU_VIEWPORT); |
| 122 | debug("iATU%d:\n", i); |
| 123 | debug("\tLOWER PHYS 0x%08x\n", |
| 124 | dbi_readl(pcie, PCIE_ATU_LOWER_BASE)); |
| 125 | debug("\tUPPER PHYS 0x%08x\n", |
| 126 | dbi_readl(pcie, PCIE_ATU_UPPER_BASE)); |
| 127 | debug("\tLOWER BUS 0x%08x\n", |
| 128 | dbi_readl(pcie, PCIE_ATU_LOWER_TARGET)); |
| 129 | debug("\tUPPER BUS 0x%08x\n", |
| 130 | dbi_readl(pcie, PCIE_ATU_UPPER_TARGET)); |
| 131 | debug("\tLIMIT 0x%08x\n", |
| 132 | readl(pcie->dbi + PCIE_ATU_LIMIT)); |
| 133 | debug("\tCR1 0x%08x\n", |
| 134 | dbi_readl(pcie, PCIE_ATU_CR1)); |
| 135 | debug("\tCR2 0x%08x\n", |
| 136 | dbi_readl(pcie, PCIE_ATU_CR2)); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | static void ls_pcie_setup_atu(struct ls_pcie *pcie) |
| 141 | { |
| 142 | struct pci_region *io, *mem, *pref; |
| 143 | unsigned long long offset = 0; |
| 144 | int idx = 0; |
| 145 | uint svr; |
| 146 | |
| 147 | svr = get_svr(); |
| 148 | if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { |
| 149 | offset = LS1021_PCIE_SPACE_OFFSET + |
| 150 | LS1021_PCIE_SPACE_SIZE * pcie->idx; |
| 151 | } |
| 152 | |
| 153 | /* ATU 0 : OUTBOUND : CFG0 */ |
| 154 | ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX0, |
| 155 | PCIE_ATU_TYPE_CFG0, |
| 156 | pcie->cfg_res.start + offset, |
| 157 | 0, |
| 158 | fdt_resource_size(&pcie->cfg_res) / 2); |
| 159 | /* ATU 1 : OUTBOUND : CFG1 */ |
| 160 | ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1, |
| 161 | PCIE_ATU_TYPE_CFG1, |
| 162 | pcie->cfg_res.start + offset + |
| 163 | fdt_resource_size(&pcie->cfg_res) / 2, |
| 164 | 0, |
| 165 | fdt_resource_size(&pcie->cfg_res) / 2); |
| 166 | |
| 167 | pci_get_regions(pcie->bus, &io, &mem, &pref); |
| 168 | idx = PCIE_ATU_REGION_INDEX1 + 1; |
| 169 | |
| 170 | if (io) |
| 171 | /* ATU : OUTBOUND : IO */ |
| 172 | ls_pcie_atu_outbound_set(pcie, idx++, |
| 173 | PCIE_ATU_TYPE_IO, |
| 174 | io->phys_start + offset, |
| 175 | io->bus_start, |
| 176 | io->size); |
| 177 | |
| 178 | if (mem) |
| 179 | /* ATU : OUTBOUND : MEM */ |
| 180 | ls_pcie_atu_outbound_set(pcie, idx++, |
| 181 | PCIE_ATU_TYPE_MEM, |
| 182 | mem->phys_start + offset, |
| 183 | mem->bus_start, |
| 184 | mem->size); |
| 185 | |
| 186 | if (pref) |
| 187 | /* ATU : OUTBOUND : pref */ |
| 188 | ls_pcie_atu_outbound_set(pcie, idx++, |
| 189 | PCIE_ATU_TYPE_MEM, |
| 190 | pref->phys_start + offset, |
| 191 | pref->bus_start, |
| 192 | pref->size); |
| 193 | |
| 194 | ls_pcie_dump_atu(pcie); |
| 195 | } |
| 196 | |
| 197 | /* Return 0 if the address is valid, -errno if not valid */ |
| 198 | static int ls_pcie_addr_valid(struct ls_pcie *pcie, pci_dev_t bdf) |
| 199 | { |
| 200 | struct udevice *bus = pcie->bus; |
| 201 | |
| 202 | if (!pcie->enabled) |
| 203 | return -ENXIO; |
| 204 | |
| 205 | if (PCI_BUS(bdf) < bus->seq) |
| 206 | return -EINVAL; |
| 207 | |
| 208 | if ((PCI_BUS(bdf) > bus->seq) && (!ls_pcie_link_up(pcie))) |
| 209 | return -EINVAL; |
| 210 | |
| 211 | if (PCI_BUS(bdf) <= (bus->seq + 1) && (PCI_DEV(bdf) > 0)) |
| 212 | return -EINVAL; |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | void *ls_pcie_conf_address(struct ls_pcie *pcie, pci_dev_t bdf, |
| 218 | int offset) |
| 219 | { |
| 220 | struct udevice *bus = pcie->bus; |
| 221 | u32 busdev; |
| 222 | |
| 223 | if (PCI_BUS(bdf) == bus->seq) |
| 224 | return pcie->dbi + offset; |
| 225 | |
| 226 | busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) | |
| 227 | PCIE_ATU_DEV(PCI_DEV(bdf)) | |
| 228 | PCIE_ATU_FUNC(PCI_FUNC(bdf)); |
| 229 | |
| 230 | if (PCI_BUS(bdf) == bus->seq + 1) { |
| 231 | ls_pcie_cfg0_set_busdev(pcie, busdev); |
| 232 | return pcie->cfg0 + offset; |
| 233 | } else { |
| 234 | ls_pcie_cfg1_set_busdev(pcie, busdev); |
| 235 | return pcie->cfg1 + offset; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | static int ls_pcie_read_config(struct udevice *bus, pci_dev_t bdf, |
| 240 | uint offset, ulong *valuep, |
| 241 | enum pci_size_t size) |
| 242 | { |
| 243 | struct ls_pcie *pcie = dev_get_priv(bus); |
| 244 | void *address; |
| 245 | |
| 246 | if (ls_pcie_addr_valid(pcie, bdf)) { |
| 247 | *valuep = pci_get_ff(size); |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | address = ls_pcie_conf_address(pcie, bdf, offset); |
| 252 | |
| 253 | switch (size) { |
| 254 | case PCI_SIZE_8: |
| 255 | *valuep = readb(address); |
| 256 | return 0; |
| 257 | case PCI_SIZE_16: |
| 258 | *valuep = readw(address); |
| 259 | return 0; |
| 260 | case PCI_SIZE_32: |
| 261 | *valuep = readl(address); |
| 262 | return 0; |
| 263 | default: |
| 264 | return -EINVAL; |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf, |
| 269 | uint offset, ulong value, |
| 270 | enum pci_size_t size) |
| 271 | { |
| 272 | struct ls_pcie *pcie = dev_get_priv(bus); |
| 273 | void *address; |
| 274 | |
| 275 | if (ls_pcie_addr_valid(pcie, bdf)) |
| 276 | return 0; |
| 277 | |
| 278 | address = ls_pcie_conf_address(pcie, bdf, offset); |
| 279 | |
| 280 | switch (size) { |
| 281 | case PCI_SIZE_8: |
| 282 | writeb(value, address); |
| 283 | return 0; |
| 284 | case PCI_SIZE_16: |
| 285 | writew(value, address); |
| 286 | return 0; |
| 287 | case PCI_SIZE_32: |
| 288 | writel(value, address); |
| 289 | return 0; |
| 290 | default: |
| 291 | return -EINVAL; |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | /* Clear multi-function bit */ |
| 296 | static void ls_pcie_clear_multifunction(struct ls_pcie *pcie) |
| 297 | { |
| 298 | writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE); |
| 299 | } |
| 300 | |
| 301 | /* Fix class value */ |
| 302 | static void ls_pcie_fix_class(struct ls_pcie *pcie) |
| 303 | { |
| 304 | writew(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE); |
| 305 | } |
| 306 | |
| 307 | /* Drop MSG TLP except for Vendor MSG */ |
| 308 | static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie) |
| 309 | { |
| 310 | u32 val; |
| 311 | |
| 312 | val = dbi_readl(pcie, PCIE_STRFMR1); |
| 313 | val &= 0xDFFFFFFF; |
| 314 | dbi_writel(pcie, val, PCIE_STRFMR1); |
| 315 | } |
| 316 | |
| 317 | /* Disable all bars in RC mode */ |
| 318 | static void ls_pcie_disable_bars(struct ls_pcie *pcie) |
| 319 | { |
| 320 | u32 sriov; |
| 321 | |
| 322 | sriov = in_le32(pcie->dbi + PCIE_SRIOV); |
| 323 | |
| 324 | /* |
| 325 | * TODO: For PCIe controller with SRIOV, the method to disable bars |
| 326 | * is different and more complex, so will add later. |
| 327 | */ |
| 328 | if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) |
| 329 | return; |
| 330 | |
| 331 | dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_0); |
| 332 | dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_1); |
| 333 | dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1); |
| 334 | } |
| 335 | |
| 336 | static void ls_pcie_setup_ctrl(struct ls_pcie *pcie) |
| 337 | { |
| 338 | ls_pcie_setup_atu(pcie); |
| 339 | |
| 340 | dbi_writel(pcie, 1, PCIE_DBI_RO_WR_EN); |
| 341 | ls_pcie_fix_class(pcie); |
| 342 | ls_pcie_clear_multifunction(pcie); |
| 343 | ls_pcie_drop_msg_tlp(pcie); |
| 344 | dbi_writel(pcie, 0, PCIE_DBI_RO_WR_EN); |
| 345 | |
| 346 | ls_pcie_disable_bars(pcie); |
| 347 | } |
| 348 | |
| 349 | static void ls_pcie_ep_setup_atu(struct ls_pcie *pcie) |
| 350 | { |
| 351 | u64 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE; |
| 352 | |
| 353 | /* ATU 0 : INBOUND : map BAR0 */ |
| 354 | ls_pcie_atu_inbound_set(pcie, 0, 0, phys); |
| 355 | /* ATU 1 : INBOUND : map BAR1 */ |
| 356 | phys += PCIE_BAR1_SIZE; |
| 357 | ls_pcie_atu_inbound_set(pcie, 1, 1, phys); |
| 358 | /* ATU 2 : INBOUND : map BAR2 */ |
| 359 | phys += PCIE_BAR2_SIZE; |
| 360 | ls_pcie_atu_inbound_set(pcie, 2, 2, phys); |
| 361 | /* ATU 3 : INBOUND : map BAR4 */ |
| 362 | phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + PCIE_BAR4_SIZE; |
| 363 | ls_pcie_atu_inbound_set(pcie, 3, 4, phys); |
| 364 | |
| 365 | /* ATU 0 : OUTBOUND : map MEM */ |
| 366 | ls_pcie_atu_outbound_set(pcie, 0, |
| 367 | PCIE_ATU_TYPE_MEM, |
| 368 | pcie->cfg_res.start, |
| 369 | 0, |
| 370 | CONFIG_SYS_PCI_MEMORY_SIZE); |
| 371 | } |
| 372 | |
| 373 | /* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */ |
| 374 | static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size) |
| 375 | { |
| 376 | /* The least inbound window is 4KiB */ |
| 377 | if (size < 4 * 1024) |
| 378 | return; |
| 379 | |
| 380 | switch (bar) { |
| 381 | case 0: |
| 382 | writel(size - 1, bar_base + PCI_BASE_ADDRESS_0); |
| 383 | break; |
| 384 | case 1: |
| 385 | writel(size - 1, bar_base + PCI_BASE_ADDRESS_1); |
| 386 | break; |
| 387 | case 2: |
| 388 | writel(size - 1, bar_base + PCI_BASE_ADDRESS_2); |
| 389 | writel(0, bar_base + PCI_BASE_ADDRESS_3); |
| 390 | break; |
| 391 | case 4: |
| 392 | writel(size - 1, bar_base + PCI_BASE_ADDRESS_4); |
| 393 | writel(0, bar_base + PCI_BASE_ADDRESS_5); |
| 394 | break; |
| 395 | default: |
| 396 | break; |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | static void ls_pcie_ep_setup_bars(void *bar_base) |
| 401 | { |
| 402 | /* BAR0 - 32bit - 4K configuration */ |
| 403 | ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE); |
| 404 | /* BAR1 - 32bit - 8K MSIX*/ |
| 405 | ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE); |
| 406 | /* BAR2 - 64bit - 4K MEM desciptor */ |
| 407 | ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE); |
| 408 | /* BAR4 - 64bit - 1M MEM*/ |
| 409 | ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE); |
| 410 | } |
| 411 | |
Hou Zhiqiang | d170aca | 2017-02-10 15:42:11 +0800 | [diff] [blame^] | 412 | static void ls_pcie_ep_enable_cfg(struct ls_pcie *pcie) |
| 413 | { |
| 414 | ctrl_writel(pcie, PCIE_CONFIG_READY, PCIE_PF_CONFIG); |
| 415 | } |
| 416 | |
Minghuan Lian | 80afc63 | 2016-12-13 14:54:17 +0800 | [diff] [blame] | 417 | static void ls_pcie_setup_ep(struct ls_pcie *pcie) |
| 418 | { |
| 419 | u32 sriov; |
| 420 | |
| 421 | sriov = readl(pcie->dbi + PCIE_SRIOV); |
| 422 | if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) { |
| 423 | int pf, vf; |
| 424 | |
| 425 | for (pf = 0; pf < PCIE_PF_NUM; pf++) { |
| 426 | for (vf = 0; vf <= PCIE_VF_NUM; vf++) { |
| 427 | ctrl_writel(pcie, PCIE_LCTRL0_VAL(pf, vf), |
| 428 | PCIE_PF_VF_CTRL); |
| 429 | |
| 430 | ls_pcie_ep_setup_bars(pcie->dbi); |
| 431 | ls_pcie_ep_setup_atu(pcie); |
| 432 | } |
| 433 | } |
| 434 | /* Disable CFG2 */ |
| 435 | ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL); |
| 436 | } else { |
| 437 | ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE); |
| 438 | ls_pcie_ep_setup_atu(pcie); |
| 439 | } |
Hou Zhiqiang | d170aca | 2017-02-10 15:42:11 +0800 | [diff] [blame^] | 440 | |
| 441 | ls_pcie_ep_enable_cfg(pcie); |
Minghuan Lian | 80afc63 | 2016-12-13 14:54:17 +0800 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | static int ls_pcie_probe(struct udevice *dev) |
| 445 | { |
| 446 | struct ls_pcie *pcie = dev_get_priv(dev); |
| 447 | const void *fdt = gd->fdt_blob; |
Simon Glass | e160f7d | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 448 | int node = dev_of_offset(dev); |
Minghuan Lian | 80afc63 | 2016-12-13 14:54:17 +0800 | [diff] [blame] | 449 | u8 header_type; |
| 450 | u16 link_sta; |
| 451 | bool ep_mode; |
| 452 | int ret; |
| 453 | |
| 454 | pcie->bus = dev; |
| 455 | |
| 456 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| 457 | "dbi", &pcie->dbi_res); |
| 458 | if (ret) { |
| 459 | printf("ls-pcie: resource \"dbi\" not found\n"); |
| 460 | return ret; |
| 461 | } |
| 462 | |
| 463 | pcie->idx = (pcie->dbi_res.start - PCIE_SYS_BASE_ADDR) / PCIE_CCSR_SIZE; |
| 464 | |
| 465 | list_add(&pcie->list, &ls_pcie_list); |
| 466 | |
| 467 | pcie->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx)); |
| 468 | if (!pcie->enabled) { |
| 469 | printf("PCIe%d: %s disabled\n", pcie->idx, dev->name); |
| 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | pcie->dbi = map_physmem(pcie->dbi_res.start, |
| 474 | fdt_resource_size(&pcie->dbi_res), |
| 475 | MAP_NOCACHE); |
| 476 | |
| 477 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| 478 | "lut", &pcie->lut_res); |
| 479 | if (!ret) |
| 480 | pcie->lut = map_physmem(pcie->lut_res.start, |
| 481 | fdt_resource_size(&pcie->lut_res), |
| 482 | MAP_NOCACHE); |
| 483 | |
| 484 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| 485 | "ctrl", &pcie->ctrl_res); |
| 486 | if (!ret) |
| 487 | pcie->ctrl = map_physmem(pcie->ctrl_res.start, |
| 488 | fdt_resource_size(&pcie->ctrl_res), |
| 489 | MAP_NOCACHE); |
| 490 | if (!pcie->ctrl) |
| 491 | pcie->ctrl = pcie->lut; |
| 492 | |
| 493 | if (!pcie->ctrl) { |
| 494 | printf("%s: NOT find CTRL\n", dev->name); |
| 495 | return -1; |
| 496 | } |
| 497 | |
| 498 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
| 499 | "config", &pcie->cfg_res); |
| 500 | if (ret) { |
| 501 | printf("%s: resource \"config\" not found\n", dev->name); |
| 502 | return ret; |
| 503 | } |
| 504 | |
| 505 | pcie->cfg0 = map_physmem(pcie->cfg_res.start, |
| 506 | fdt_resource_size(&pcie->cfg_res), |
| 507 | MAP_NOCACHE); |
| 508 | pcie->cfg1 = pcie->cfg0 + fdt_resource_size(&pcie->cfg_res) / 2; |
| 509 | |
| 510 | pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian"); |
| 511 | |
| 512 | debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n", |
| 513 | dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut, |
| 514 | (unsigned long)pcie->ctrl, (unsigned long)pcie->cfg0, |
| 515 | pcie->big_endian); |
| 516 | |
| 517 | header_type = readb(pcie->dbi + PCI_HEADER_TYPE); |
| 518 | ep_mode = (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL; |
| 519 | printf("PCIe%u: %s %s", pcie->idx, dev->name, |
| 520 | ep_mode ? "Endpoint" : "Root Complex"); |
| 521 | |
| 522 | if (ep_mode) |
| 523 | ls_pcie_setup_ep(pcie); |
| 524 | else |
| 525 | ls_pcie_setup_ctrl(pcie); |
| 526 | |
| 527 | if (!ls_pcie_link_up(pcie)) { |
| 528 | /* Let the user know there's no PCIe link */ |
| 529 | printf(": no link\n"); |
| 530 | return 0; |
| 531 | } |
| 532 | |
| 533 | /* Print the negotiated PCIe link width */ |
| 534 | link_sta = readw(pcie->dbi + PCIE_LINK_STA); |
| 535 | printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4, |
| 536 | link_sta & PCIE_LINK_SPEED_MASK); |
| 537 | |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | static const struct dm_pci_ops ls_pcie_ops = { |
| 542 | .read_config = ls_pcie_read_config, |
| 543 | .write_config = ls_pcie_write_config, |
| 544 | }; |
| 545 | |
| 546 | static const struct udevice_id ls_pcie_ids[] = { |
| 547 | { .compatible = "fsl,ls-pcie" }, |
| 548 | { } |
| 549 | }; |
| 550 | |
| 551 | U_BOOT_DRIVER(pci_layerscape) = { |
| 552 | .name = "pci_layerscape", |
| 553 | .id = UCLASS_PCI, |
| 554 | .of_match = ls_pcie_ids, |
| 555 | .ops = &ls_pcie_ops, |
| 556 | .probe = ls_pcie_probe, |
| 557 | .priv_auto_alloc_size = sizeof(struct ls_pcie), |
| 558 | }; |