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Commit | Line | Data |
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118e58e2 XB |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* | |
be384160 | 3 | * Copyright 2020,2021 NXP |
118e58e2 XB |
4 | * Layerscape PCIe driver |
5 | */ | |
6 | ||
d678a59d | 7 | #include <common.h> |
118e58e2 XB |
8 | #include <asm/arch/fsl_serdes.h> |
9 | #include <pci.h> | |
401d1c4f | 10 | #include <asm/global_data.h> |
118e58e2 XB |
11 | #include <asm/io.h> |
12 | #include <errno.h> | |
13 | #include <malloc.h> | |
14 | #include <dm.h> | |
15 | #include <dm/devres.h> | |
16 | #if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \ | |
17 | defined(CONFIG_ARM) | |
18 | #include <asm/arch/clock.h> | |
19 | #endif | |
20 | #include "pcie_layerscape.h" | |
21 | ||
22 | DECLARE_GLOBAL_DATA_PTR; | |
23 | ||
e10da1f9 MW |
24 | struct ls_pcie_drvdata { |
25 | u32 lut_offset; | |
26 | u32 ctrl_offset; | |
27 | bool big_endian; | |
28 | }; | |
29 | ||
118e58e2 XB |
30 | static void ls_pcie_cfg0_set_busdev(struct ls_pcie_rc *pcie_rc, u32 busdev) |
31 | { | |
32 | struct ls_pcie *pcie = pcie_rc->pcie; | |
33 | ||
34 | dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0, | |
35 | PCIE_ATU_VIEWPORT); | |
36 | dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); | |
37 | } | |
38 | ||
39 | static void ls_pcie_cfg1_set_busdev(struct ls_pcie_rc *pcie_rc, u32 busdev) | |
40 | { | |
41 | struct ls_pcie *pcie = pcie_rc->pcie; | |
42 | ||
43 | dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1, | |
44 | PCIE_ATU_VIEWPORT); | |
45 | dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); | |
46 | } | |
47 | ||
48 | static void ls_pcie_setup_atu(struct ls_pcie_rc *pcie_rc) | |
49 | { | |
50 | struct pci_region *io, *mem, *pref; | |
51 | unsigned long long offset = 0; | |
52 | struct ls_pcie *pcie = pcie_rc->pcie; | |
53 | int idx = 0; | |
54 | uint svr; | |
55 | ||
56 | svr = get_svr(); | |
57 | if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { | |
58 | offset = LS1021_PCIE_SPACE_OFFSET + | |
59 | LS1021_PCIE_SPACE_SIZE * pcie->idx; | |
60 | } | |
61 | ||
62 | /* ATU 0 : OUTBOUND : CFG0 */ | |
63 | ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX0, | |
64 | PCIE_ATU_TYPE_CFG0, | |
65 | pcie_rc->cfg_res.start + offset, | |
66 | 0, | |
67 | fdt_resource_size(&pcie_rc->cfg_res) / 2); | |
68 | /* ATU 1 : OUTBOUND : CFG1 */ | |
69 | ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1, | |
70 | PCIE_ATU_TYPE_CFG1, | |
71 | pcie_rc->cfg_res.start + offset + | |
72 | fdt_resource_size(&pcie_rc->cfg_res) / 2, | |
73 | 0, | |
74 | fdt_resource_size(&pcie_rc->cfg_res) / 2); | |
75 | ||
76 | pci_get_regions(pcie_rc->bus, &io, &mem, &pref); | |
77 | idx = PCIE_ATU_REGION_INDEX1 + 1; | |
78 | ||
79 | /* Fix the pcie memory map for LS2088A series SoCs */ | |
80 | svr = (svr >> SVR_VAR_PER_SHIFT) & 0xFFFFFE; | |
81 | if (svr == SVR_LS2088A || svr == SVR_LS2084A || | |
82 | svr == SVR_LS2048A || svr == SVR_LS2044A || | |
83 | svr == SVR_LS2081A || svr == SVR_LS2041A) { | |
84 | if (io) | |
85 | io->phys_start = (io->phys_start & | |
86 | (PCIE_PHYS_SIZE - 1)) + | |
87 | LS2088A_PCIE1_PHYS_ADDR + | |
88 | LS2088A_PCIE_PHYS_SIZE * pcie->idx; | |
89 | if (mem) | |
90 | mem->phys_start = (mem->phys_start & | |
91 | (PCIE_PHYS_SIZE - 1)) + | |
92 | LS2088A_PCIE1_PHYS_ADDR + | |
93 | LS2088A_PCIE_PHYS_SIZE * pcie->idx; | |
94 | if (pref) | |
95 | pref->phys_start = (pref->phys_start & | |
96 | (PCIE_PHYS_SIZE - 1)) + | |
97 | LS2088A_PCIE1_PHYS_ADDR + | |
98 | LS2088A_PCIE_PHYS_SIZE * pcie->idx; | |
99 | } | |
100 | ||
101 | if (io) | |
102 | /* ATU : OUTBOUND : IO */ | |
103 | ls_pcie_atu_outbound_set(pcie, idx++, | |
104 | PCIE_ATU_TYPE_IO, | |
105 | io->phys_start + offset, | |
106 | io->bus_start, | |
107 | io->size); | |
108 | ||
109 | if (mem) | |
110 | /* ATU : OUTBOUND : MEM */ | |
111 | ls_pcie_atu_outbound_set(pcie, idx++, | |
112 | PCIE_ATU_TYPE_MEM, | |
113 | mem->phys_start + offset, | |
114 | mem->bus_start, | |
115 | mem->size); | |
116 | ||
117 | if (pref) | |
118 | /* ATU : OUTBOUND : pref */ | |
119 | ls_pcie_atu_outbound_set(pcie, idx++, | |
120 | PCIE_ATU_TYPE_MEM, | |
121 | pref->phys_start + offset, | |
122 | pref->bus_start, | |
123 | pref->size); | |
124 | ||
80b5a662 | 125 | ls_pcie_dump_atu(pcie, PCIE_ATU_REGION_NUM, PCIE_ATU_REGION_OUTBOUND); |
118e58e2 XB |
126 | } |
127 | ||
128 | /* Return 0 if the address is valid, -errno if not valid */ | |
129 | static int ls_pcie_addr_valid(struct ls_pcie_rc *pcie_rc, pci_dev_t bdf) | |
130 | { | |
131 | struct udevice *bus = pcie_rc->bus; | |
132 | struct ls_pcie *pcie = pcie_rc->pcie; | |
133 | ||
134 | if (pcie->mode == PCI_HEADER_TYPE_NORMAL) | |
135 | return -ENODEV; | |
136 | ||
137 | if (!pcie_rc->enabled) | |
138 | return -ENXIO; | |
139 | ||
8b85dfc6 | 140 | if (PCI_BUS(bdf) < dev_seq(bus)) |
118e58e2 XB |
141 | return -EINVAL; |
142 | ||
8b85dfc6 | 143 | if ((PCI_BUS(bdf) > dev_seq(bus)) && (!ls_pcie_link_up(pcie))) |
118e58e2 XB |
144 | return -EINVAL; |
145 | ||
8b85dfc6 | 146 | if (PCI_BUS(bdf) <= (dev_seq(bus) + 1) && (PCI_DEV(bdf) > 0)) |
118e58e2 XB |
147 | return -EINVAL; |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
c67930ef VO |
152 | static int ls_pcie_conf_address(const struct udevice *bus, pci_dev_t bdf, |
153 | uint offset, void **paddress) | |
118e58e2 XB |
154 | { |
155 | struct ls_pcie_rc *pcie_rc = dev_get_priv(bus); | |
156 | struct ls_pcie *pcie = pcie_rc->pcie; | |
157 | u32 busdev; | |
158 | ||
159 | if (ls_pcie_addr_valid(pcie_rc, bdf)) | |
160 | return -EINVAL; | |
161 | ||
8b85dfc6 | 162 | if (PCI_BUS(bdf) == dev_seq(bus)) { |
118e58e2 XB |
163 | *paddress = pcie->dbi + offset; |
164 | return 0; | |
165 | } | |
166 | ||
8b85dfc6 | 167 | busdev = PCIE_ATU_BUS(PCI_BUS(bdf) - dev_seq(bus)) | |
118e58e2 XB |
168 | PCIE_ATU_DEV(PCI_DEV(bdf)) | |
169 | PCIE_ATU_FUNC(PCI_FUNC(bdf)); | |
170 | ||
8b85dfc6 | 171 | if (PCI_BUS(bdf) == dev_seq(bus) + 1) { |
118e58e2 XB |
172 | ls_pcie_cfg0_set_busdev(pcie_rc, busdev); |
173 | *paddress = pcie_rc->cfg0 + offset; | |
174 | } else { | |
175 | ls_pcie_cfg1_set_busdev(pcie_rc, busdev); | |
176 | *paddress = pcie_rc->cfg1 + offset; | |
177 | } | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static int ls_pcie_read_config(const struct udevice *bus, pci_dev_t bdf, | |
182 | uint offset, ulong *valuep, | |
183 | enum pci_size_t size) | |
184 | { | |
185 | return pci_generic_mmap_read_config(bus, ls_pcie_conf_address, | |
186 | bdf, offset, valuep, size); | |
187 | } | |
188 | ||
189 | static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf, | |
190 | uint offset, ulong value, | |
191 | enum pci_size_t size) | |
192 | { | |
193 | return pci_generic_mmap_write_config(bus, ls_pcie_conf_address, | |
194 | bdf, offset, value, size); | |
195 | } | |
196 | ||
197 | /* Clear multi-function bit */ | |
198 | static void ls_pcie_clear_multifunction(struct ls_pcie_rc *pcie_rc) | |
199 | { | |
200 | struct ls_pcie *pcie = pcie_rc->pcie; | |
201 | ||
202 | writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE); | |
203 | } | |
204 | ||
205 | /* Fix class value */ | |
206 | static void ls_pcie_fix_class(struct ls_pcie_rc *pcie_rc) | |
207 | { | |
208 | struct ls_pcie *pcie = pcie_rc->pcie; | |
209 | ||
210 | writew(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE); | |
211 | } | |
212 | ||
213 | /* Drop MSG TLP except for Vendor MSG */ | |
214 | static void ls_pcie_drop_msg_tlp(struct ls_pcie_rc *pcie_rc) | |
215 | { | |
216 | struct ls_pcie *pcie = pcie_rc->pcie; | |
217 | u32 val; | |
218 | ||
219 | val = dbi_readl(pcie, PCIE_STRFMR1); | |
220 | val &= 0xDFFFFFFF; | |
221 | dbi_writel(pcie, val, PCIE_STRFMR1); | |
222 | } | |
223 | ||
224 | /* Disable all bars in RC mode */ | |
225 | static void ls_pcie_disable_bars(struct ls_pcie_rc *pcie_rc) | |
226 | { | |
227 | struct ls_pcie *pcie = pcie_rc->pcie; | |
228 | ||
229 | dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_0); | |
230 | dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_1); | |
231 | dbi_writel(pcie, 0xfffffffe, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1); | |
232 | } | |
233 | ||
234 | static void ls_pcie_setup_ctrl(struct ls_pcie_rc *pcie_rc) | |
235 | { | |
236 | struct ls_pcie *pcie = pcie_rc->pcie; | |
237 | ||
238 | ls_pcie_setup_atu(pcie_rc); | |
239 | ||
240 | ls_pcie_dbi_ro_wr_en(pcie); | |
241 | ls_pcie_fix_class(pcie_rc); | |
242 | ls_pcie_clear_multifunction(pcie_rc); | |
243 | ls_pcie_drop_msg_tlp(pcie_rc); | |
244 | ls_pcie_dbi_ro_wr_dis(pcie); | |
245 | ||
246 | ls_pcie_disable_bars(pcie_rc); | |
118e58e2 XB |
247 | } |
248 | ||
249 | static int ls_pcie_probe(struct udevice *dev) | |
250 | { | |
e10da1f9 | 251 | const struct ls_pcie_drvdata *drvdata = (void *)dev_get_driver_data(dev); |
118e58e2 XB |
252 | struct ls_pcie_rc *pcie_rc = dev_get_priv(dev); |
253 | const void *fdt = gd->fdt_blob; | |
254 | int node = dev_of_offset(dev); | |
255 | struct ls_pcie *pcie; | |
256 | u16 link_sta; | |
257 | uint svr; | |
258 | int ret; | |
259 | fdt_size_t cfg_size; | |
260 | ||
261 | pcie_rc->bus = dev; | |
262 | ||
ae5cbc43 | 263 | pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); |
118e58e2 XB |
264 | if (!pcie) |
265 | return -ENOMEM; | |
266 | ||
267 | pcie_rc->pcie = pcie; | |
268 | ||
e10da1f9 | 269 | /* try resource name of the official binding first */ |
118e58e2 | 270 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", |
e10da1f9 MW |
271 | "regs", &pcie_rc->dbi_res); |
272 | if (ret) | |
273 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", | |
274 | "dbi", &pcie_rc->dbi_res); | |
118e58e2 XB |
275 | if (ret) { |
276 | printf("ls-pcie: resource \"dbi\" not found\n"); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | pcie->idx = (pcie_rc->dbi_res.start - PCIE_SYS_BASE_ADDR) / | |
281 | PCIE_CCSR_SIZE; | |
282 | ||
283 | list_add(&pcie_rc->list, &ls_pcie_list); | |
284 | ||
285 | pcie_rc->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx)); | |
286 | if (!pcie_rc->enabled) { | |
b6c6a245 WK |
287 | printf("PCIe%d: %s disabled\n", PCIE_SRDS_PRTCL(pcie->idx), |
288 | dev->name); | |
118e58e2 XB |
289 | return 0; |
290 | } | |
291 | ||
292 | pcie->dbi = map_physmem(pcie_rc->dbi_res.start, | |
293 | fdt_resource_size(&pcie_rc->dbi_res), | |
294 | MAP_NOCACHE); | |
295 | ||
296 | pcie->mode = readb(pcie->dbi + PCI_HEADER_TYPE) & 0x7f; | |
297 | if (pcie->mode == PCI_HEADER_TYPE_NORMAL) | |
298 | return 0; | |
299 | ||
e10da1f9 MW |
300 | if (drvdata) { |
301 | pcie->lut = pcie->dbi + drvdata->lut_offset; | |
302 | } else { | |
303 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", | |
304 | "lut", &pcie_rc->lut_res); | |
305 | if (!ret) | |
306 | pcie->lut = map_physmem(pcie_rc->lut_res.start, | |
307 | fdt_resource_size(&pcie_rc->lut_res), | |
308 | MAP_NOCACHE); | |
309 | } | |
118e58e2 | 310 | |
e10da1f9 MW |
311 | if (drvdata) { |
312 | pcie->ctrl = pcie->lut + drvdata->ctrl_offset; | |
313 | } else { | |
314 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", | |
315 | "ctrl", &pcie_rc->ctrl_res); | |
316 | if (!ret) | |
317 | pcie->ctrl = map_physmem(pcie_rc->ctrl_res.start, | |
318 | fdt_resource_size(&pcie_rc->ctrl_res), | |
319 | MAP_NOCACHE); | |
320 | if (!pcie->ctrl) | |
321 | pcie->ctrl = pcie->lut; | |
322 | } | |
118e58e2 XB |
323 | |
324 | if (!pcie->ctrl) { | |
325 | printf("%s: NOT find CTRL\n", dev->name); | |
326 | return -1; | |
327 | } | |
328 | ||
329 | ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", | |
330 | "config", &pcie_rc->cfg_res); | |
331 | if (ret) { | |
332 | printf("%s: resource \"config\" not found\n", dev->name); | |
333 | return ret; | |
334 | } | |
335 | ||
49df7c90 WK |
336 | cfg_size = fdt_resource_size(&pcie_rc->cfg_res); |
337 | if (cfg_size < SZ_8K) { | |
338 | printf("PCIe%d: %s Invalid size(0x%llx) for resource \"config\",expected minimum 0x%x\n", | |
339 | PCIE_SRDS_PRTCL(pcie->idx), dev->name, (u64)cfg_size, SZ_8K); | |
340 | return 0; | |
341 | } | |
342 | ||
118e58e2 XB |
343 | /* |
344 | * Fix the pcie memory map address and PF control registers address | |
345 | * for LS2088A series SoCs | |
346 | */ | |
347 | svr = get_svr(); | |
348 | svr = (svr >> SVR_VAR_PER_SHIFT) & 0xFFFFFE; | |
349 | if (svr == SVR_LS2088A || svr == SVR_LS2084A || | |
350 | svr == SVR_LS2048A || svr == SVR_LS2044A || | |
351 | svr == SVR_LS2081A || svr == SVR_LS2041A) { | |
118e58e2 XB |
352 | pcie_rc->cfg_res.start = LS2088A_PCIE1_PHYS_ADDR + |
353 | LS2088A_PCIE_PHYS_SIZE * pcie->idx; | |
354 | pcie_rc->cfg_res.end = pcie_rc->cfg_res.start + cfg_size; | |
355 | pcie->ctrl = pcie->lut + 0x40000; | |
356 | } | |
357 | ||
358 | pcie_rc->cfg0 = map_physmem(pcie_rc->cfg_res.start, | |
359 | fdt_resource_size(&pcie_rc->cfg_res), | |
360 | MAP_NOCACHE); | |
361 | pcie_rc->cfg1 = pcie_rc->cfg0 + | |
362 | fdt_resource_size(&pcie_rc->cfg_res) / 2; | |
363 | ||
e10da1f9 MW |
364 | if (drvdata) |
365 | pcie->big_endian = drvdata->big_endian; | |
366 | else | |
367 | pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian"); | |
118e58e2 XB |
368 | |
369 | debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n", | |
370 | dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut, | |
371 | (unsigned long)pcie->ctrl, (unsigned long)pcie_rc->cfg0, | |
372 | pcie->big_endian); | |
373 | ||
b6c6a245 WK |
374 | printf("PCIe%u: %s %s", PCIE_SRDS_PRTCL(pcie->idx), dev->name, |
375 | "Root Complex"); | |
118e58e2 XB |
376 | ls_pcie_setup_ctrl(pcie_rc); |
377 | ||
378 | if (!ls_pcie_link_up(pcie)) { | |
379 | /* Let the user know there's no PCIe link */ | |
380 | printf(": no link\n"); | |
381 | return 0; | |
382 | } | |
383 | ||
384 | /* Print the negotiated PCIe link width */ | |
385 | link_sta = readw(pcie->dbi + PCIE_LINK_STA); | |
386 | printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4, | |
387 | link_sta & PCIE_LINK_SPEED_MASK); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | static const struct dm_pci_ops ls_pcie_ops = { | |
393 | .read_config = ls_pcie_read_config, | |
394 | .write_config = ls_pcie_write_config, | |
395 | }; | |
396 | ||
e10da1f9 MW |
397 | static const struct ls_pcie_drvdata ls1028a_drvdata = { |
398 | .lut_offset = 0x80000, | |
399 | .ctrl_offset = 0x40000, | |
400 | .big_endian = false, | |
401 | }; | |
402 | ||
118e58e2 XB |
403 | static const struct udevice_id ls_pcie_ids[] = { |
404 | { .compatible = "fsl,ls-pcie" }, | |
e10da1f9 | 405 | { .compatible = "fsl,ls1028a-pcie", .data = (ulong)&ls1028a_drvdata }, |
e0f74092 | 406 | { .compatible = "fsl,ls1088a-pcie", .data = (ulong)&ls1028a_drvdata }, |
118e58e2 XB |
407 | { } |
408 | }; | |
409 | ||
410 | U_BOOT_DRIVER(pci_layerscape) = { | |
411 | .name = "pci_layerscape", | |
412 | .id = UCLASS_PCI, | |
413 | .of_match = ls_pcie_ids, | |
414 | .ops = &ls_pcie_ops, | |
415 | .probe = ls_pcie_probe, | |
41575d8e | 416 | .priv_auto = sizeof(struct ls_pcie_rc), |
118e58e2 | 417 | }; |