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11#include <linux/clk.h>
12#include <linux/crc8.h>
13#include <linux/delay.h>
14#include <linux/gpio/consumer.h>
15#include <linux/interrupt.h>
16#include <linux/io.h>
17#include <linux/iopoll.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/of_device.h>
21#include <linux/of_gpio.h>
22#include <linux/pci.h>
23#include <linux/pm_runtime.h>
24#include <linux/platform_device.h>
25#include <linux/phy/phy.h>
26#include <linux/regulator/consumer.h>
27#include <linux/reset.h>
28#include <linux/slab.h>
29#include <linux/types.h>
30
31#include "../../pci.h"
32#include "pcie-designware.h"
33
34#define PCIE20_PARF_SYS_CTRL 0x00
35#define MST_WAKEUP_EN BIT(13)
36#define SLV_WAKEUP_EN BIT(12)
37#define MSTR_ACLK_CGC_DIS BIT(10)
38#define SLV_ACLK_CGC_DIS BIT(9)
39#define CORE_CLK_CGC_DIS BIT(6)
40#define AUX_PWR_DET BIT(4)
41#define L23_CLK_RMV_DIS BIT(2)
42#define L1_CLK_RMV_DIS BIT(1)
43
44#define PCIE20_PARF_PHY_CTRL 0x40
45#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
46#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
47
48#define PCIE20_PARF_PHY_REFCLK 0x4C
49#define PHY_REFCLK_SSP_EN BIT(16)
50#define PHY_REFCLK_USE_PAD BIT(12)
51
52#define PCIE20_PARF_DBI_BASE_ADDR 0x168
53#define PCIE20_PARF_SLV_ADDR_SPACE_SIZE 0x16C
54#define PCIE20_PARF_MHI_CLOCK_RESET_CTRL 0x174
55#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT 0x178
56#define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
57#define PCIE20_PARF_LTSSM 0x1B0
58#define PCIE20_PARF_SID_OFFSET 0x234
59#define PCIE20_PARF_BDF_TRANSLATE_CFG 0x24C
60#define PCIE20_PARF_DEVICE_TYPE 0x1000
61#define PCIE20_PARF_BDF_TO_SID_TABLE_N 0x2000
62
63#define PCIE20_ELBI_SYS_CTRL 0x04
64#define PCIE20_ELBI_SYS_CTRL_LT_ENABLE BIT(0)
65
66#define PCIE20_AXI_MSTR_RESP_COMP_CTRL0 0x818
67#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4
68#define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5
69#define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c
70#define CFG_BRIDGE_SB_INIT BIT(0)
71
72#define PCIE_CAP_LINK1_VAL 0x2FD7F
73
74#define PCIE20_PARF_Q2A_FLUSH 0x1AC
75
76#define PCIE20_MISC_CONTROL_1_REG 0x8BC
77#define DBI_RO_WR_EN 1
78
79#define PERST_DELAY_US 1000
80
81#define PCIE20_PARF_PCS_DEEMPH 0x34
82#define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
83#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
84#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
85
86#define PCIE20_PARF_PCS_SWING 0x38
87#define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
88#define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
89
90#define PCIE20_PARF_CONFIG_BITS 0x50
91#define PHY_RX0_EQ(x) ((x) << 24)
92
93#define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
94#define SLV_ADDR_SPACE_SZ 0x10000000
95
96#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xa0
97
98#define DEVICE_TYPE_RC 0x4
99
100#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
101#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
102
103#define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
104
105struct qcom_pcie_resources_2_1_0 {
106 struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
107 struct reset_control *pci_reset;
108 struct reset_control *axi_reset;
109 struct reset_control *ahb_reset;
110 struct reset_control *por_reset;
111 struct reset_control *phy_reset;
112 struct reset_control *ext_reset;
113 struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
114};
115
116struct qcom_pcie_resources_1_0_0 {
117 struct clk *iface;
118 struct clk *aux;
119 struct clk *master_bus;
120 struct clk *slave_bus;
121 struct reset_control *core;
122 struct regulator *vdda;
123};
124
125#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
126struct qcom_pcie_resources_2_3_2 {
127 struct clk *aux_clk;
128 struct clk *master_clk;
129 struct clk *slave_clk;
130 struct clk *cfg_clk;
131 struct clk *pipe_clk;
132 struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
133};
134
135#define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
136struct qcom_pcie_resources_2_4_0 {
137 struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS];
138 int num_clks;
139 struct reset_control *axi_m_reset;
140 struct reset_control *axi_s_reset;
141 struct reset_control *pipe_reset;
142 struct reset_control *axi_m_vmid_reset;
143 struct reset_control *axi_s_xpu_reset;
144 struct reset_control *parf_reset;
145 struct reset_control *phy_reset;
146 struct reset_control *axi_m_sticky_reset;
147 struct reset_control *pipe_sticky_reset;
148 struct reset_control *pwr_reset;
149 struct reset_control *ahb_reset;
150 struct reset_control *phy_ahb_reset;
151};
152
153struct qcom_pcie_resources_2_3_3 {
154 struct clk *iface;
155 struct clk *axi_m_clk;
156 struct clk *axi_s_clk;
157 struct clk *ahb_clk;
158 struct clk *aux_clk;
159 struct reset_control *rst[7];
160};
161
162
163struct qcom_pcie_resources_2_7_0 {
164 struct clk_bulk_data clks[7];
165 int num_clks;
166 struct regulator_bulk_data supplies[2];
167 struct reset_control *pci_reset;
168 struct clk *pipe_clk;
169};
170
171union qcom_pcie_resources {
172 struct qcom_pcie_resources_1_0_0 v1_0_0;
173 struct qcom_pcie_resources_2_1_0 v2_1_0;
174 struct qcom_pcie_resources_2_3_2 v2_3_2;
175 struct qcom_pcie_resources_2_3_3 v2_3_3;
176 struct qcom_pcie_resources_2_4_0 v2_4_0;
177 struct qcom_pcie_resources_2_7_0 v2_7_0;
178};
179
180struct qcom_pcie;
181
182struct qcom_pcie_ops {
183 int (*get_resources)(struct qcom_pcie *pcie);
184 int (*init)(struct qcom_pcie *pcie);
185 int (*post_init)(struct qcom_pcie *pcie);
186 void (*deinit)(struct qcom_pcie *pcie);
187 void (*post_deinit)(struct qcom_pcie *pcie);
188 void (*ltssm_enable)(struct qcom_pcie *pcie);
189 int (*config_sid)(struct qcom_pcie *pcie);
190};
191
192struct qcom_pcie {
193 struct dw_pcie *pci;
194 void __iomem *parf;
195 void __iomem *elbi;
196 union qcom_pcie_resources res;
197 struct phy *phy;
198 struct gpio_desc *reset;
199 const struct qcom_pcie_ops *ops;
200};
201
202#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
203
204static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
205{
206 gpiod_set_value_cansleep(pcie->reset, 1);
207 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
208}
209
210static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
211{
212
213 msleep(100);
214 gpiod_set_value_cansleep(pcie->reset, 0);
215 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
216}
217
218static int qcom_pcie_start_link(struct dw_pcie *pci)
219{
220 struct qcom_pcie *pcie = to_qcom_pcie(pci);
221
222
223 if (pcie->ops->ltssm_enable)
224 pcie->ops->ltssm_enable(pcie);
225
226 return 0;
227}
228
229static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
230{
231 u32 val;
232
233
234 val = readl(pcie->elbi + PCIE20_ELBI_SYS_CTRL);
235 val |= PCIE20_ELBI_SYS_CTRL_LT_ENABLE;
236 writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
237}
238
239static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
240{
241 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
242 struct dw_pcie *pci = pcie->pci;
243 struct device *dev = pci->dev;
244 int ret;
245
246 res->supplies[0].supply = "vdda";
247 res->supplies[1].supply = "vdda_phy";
248 res->supplies[2].supply = "vdda_refclk";
249 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
250 res->supplies);
251 if (ret)
252 return ret;
253
254 res->clks[0].id = "iface";
255 res->clks[1].id = "core";
256 res->clks[2].id = "phy";
257 res->clks[3].id = "aux";
258 res->clks[4].id = "ref";
259
260
261 ret = devm_clk_bulk_get(dev, 3, res->clks);
262 if (ret < 0)
263 return ret;
264
265
266 ret = devm_clk_bulk_get_optional(dev, 2, res->clks + 3);
267 if (ret < 0)
268 return ret;
269
270 res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
271 if (IS_ERR(res->pci_reset))
272 return PTR_ERR(res->pci_reset);
273
274 res->axi_reset = devm_reset_control_get_exclusive(dev, "axi");
275 if (IS_ERR(res->axi_reset))
276 return PTR_ERR(res->axi_reset);
277
278 res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
279 if (IS_ERR(res->ahb_reset))
280 return PTR_ERR(res->ahb_reset);
281
282 res->por_reset = devm_reset_control_get_exclusive(dev, "por");
283 if (IS_ERR(res->por_reset))
284 return PTR_ERR(res->por_reset);
285
286 res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext");
287 if (IS_ERR(res->ext_reset))
288 return PTR_ERR(res->ext_reset);
289
290 res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
291 return PTR_ERR_OR_ZERO(res->phy_reset);
292}
293
294static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
295{
296 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
297
298 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
299 reset_control_assert(res->pci_reset);
300 reset_control_assert(res->axi_reset);
301 reset_control_assert(res->ahb_reset);
302 reset_control_assert(res->por_reset);
303 reset_control_assert(res->ext_reset);
304 reset_control_assert(res->phy_reset);
305
306 writel(1, pcie->parf + PCIE20_PARF_PHY_CTRL);
307
308 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
309}
310
311static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
312{
313 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
314 struct dw_pcie *pci = pcie->pci;
315 struct device *dev = pci->dev;
316 struct device_node *node = dev->of_node;
317 u32 val;
318 int ret;
319
320
321 reset_control_assert(res->pci_reset);
322 reset_control_assert(res->axi_reset);
323 reset_control_assert(res->ahb_reset);
324 reset_control_assert(res->por_reset);
325 reset_control_assert(res->ext_reset);
326 reset_control_assert(res->phy_reset);
327
328 writel(1, pcie->parf + PCIE20_PARF_PHY_CTRL);
329
330 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
331 if (ret < 0) {
332 dev_err(dev, "cannot enable regulators\n");
333 return ret;
334 }
335
336 ret = reset_control_deassert(res->ahb_reset);
337 if (ret) {
338 dev_err(dev, "cannot deassert ahb reset\n");
339 goto err_deassert_ahb;
340 }
341
342 ret = reset_control_deassert(res->ext_reset);
343 if (ret) {
344 dev_err(dev, "cannot deassert ext reset\n");
345 goto err_deassert_ext;
346 }
347
348 ret = reset_control_deassert(res->phy_reset);
349 if (ret) {
350 dev_err(dev, "cannot deassert phy reset\n");
351 goto err_deassert_phy;
352 }
353
354 ret = reset_control_deassert(res->pci_reset);
355 if (ret) {
356 dev_err(dev, "cannot deassert pci reset\n");
357 goto err_deassert_pci;
358 }
359
360 ret = reset_control_deassert(res->por_reset);
361 if (ret) {
362 dev_err(dev, "cannot deassert por reset\n");
363 goto err_deassert_por;
364 }
365
366 ret = reset_control_deassert(res->axi_reset);
367 if (ret) {
368 dev_err(dev, "cannot deassert axi reset\n");
369 goto err_deassert_axi;
370 }
371
372 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
373 if (ret)
374 goto err_clks;
375
376
377 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
378 val &= ~BIT(0);
379 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
380
381 if (of_device_is_compatible(node, "qcom,pcie-ipq8064") ||
382 of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) {
383 writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
384 PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
385 PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
386 pcie->parf + PCIE20_PARF_PCS_DEEMPH);
387 writel(PCS_SWING_TX_SWING_FULL(120) |
388 PCS_SWING_TX_SWING_LOW(120),
389 pcie->parf + PCIE20_PARF_PCS_SWING);
390 writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
391 }
392
393 if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
394
395 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
396 val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
397 val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
398 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
399 }
400
401
402 val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
403
404 if (!of_device_is_compatible(node, "qcom,pcie-apq8064"))
405 val &= ~PHY_REFCLK_USE_PAD;
406 val |= PHY_REFCLK_SSP_EN;
407 writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
408
409
410 usleep_range(1000, 1500);
411
412
413 writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
414 pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
415 writel(CFG_BRIDGE_SB_INIT,
416 pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
417
418 return 0;
419
420err_clks:
421 reset_control_assert(res->axi_reset);
422err_deassert_axi:
423 reset_control_assert(res->por_reset);
424err_deassert_por:
425 reset_control_assert(res->pci_reset);
426err_deassert_pci:
427 reset_control_assert(res->phy_reset);
428err_deassert_phy:
429 reset_control_assert(res->ext_reset);
430err_deassert_ext:
431 reset_control_assert(res->ahb_reset);
432err_deassert_ahb:
433 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
434
435 return ret;
436}
437
438static int qcom_pcie_get_resources_1_0_0(struct qcom_pcie *pcie)
439{
440 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
441 struct dw_pcie *pci = pcie->pci;
442 struct device *dev = pci->dev;
443
444 res->vdda = devm_regulator_get(dev, "vdda");
445 if (IS_ERR(res->vdda))
446 return PTR_ERR(res->vdda);
447
448 res->iface = devm_clk_get(dev, "iface");
449 if (IS_ERR(res->iface))
450 return PTR_ERR(res->iface);
451
452 res->aux = devm_clk_get(dev, "aux");
453 if (IS_ERR(res->aux))
454 return PTR_ERR(res->aux);
455
456 res->master_bus = devm_clk_get(dev, "master_bus");
457 if (IS_ERR(res->master_bus))
458 return PTR_ERR(res->master_bus);
459
460 res->slave_bus = devm_clk_get(dev, "slave_bus");
461 if (IS_ERR(res->slave_bus))
462 return PTR_ERR(res->slave_bus);
463
464 res->core = devm_reset_control_get_exclusive(dev, "core");
465 return PTR_ERR_OR_ZERO(res->core);
466}
467
468static void qcom_pcie_deinit_1_0_0(struct qcom_pcie *pcie)
469{
470 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
471
472 reset_control_assert(res->core);
473 clk_disable_unprepare(res->slave_bus);
474 clk_disable_unprepare(res->master_bus);
475 clk_disable_unprepare(res->iface);
476 clk_disable_unprepare(res->aux);
477 regulator_disable(res->vdda);
478}
479
480static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie)
481{
482 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
483 struct dw_pcie *pci = pcie->pci;
484 struct device *dev = pci->dev;
485 int ret;
486
487 ret = reset_control_deassert(res->core);
488 if (ret) {
489 dev_err(dev, "cannot deassert core reset\n");
490 return ret;
491 }
492
493 ret = clk_prepare_enable(res->aux);
494 if (ret) {
495 dev_err(dev, "cannot prepare/enable aux clock\n");
496 goto err_res;
497 }
498
499 ret = clk_prepare_enable(res->iface);
500 if (ret) {
501 dev_err(dev, "cannot prepare/enable iface clock\n");
502 goto err_aux;
503 }
504
505 ret = clk_prepare_enable(res->master_bus);
506 if (ret) {
507 dev_err(dev, "cannot prepare/enable master_bus clock\n");
508 goto err_iface;
509 }
510
511 ret = clk_prepare_enable(res->slave_bus);
512 if (ret) {
513 dev_err(dev, "cannot prepare/enable slave_bus clock\n");
514 goto err_master;
515 }
516
517 ret = regulator_enable(res->vdda);
518 if (ret) {
519 dev_err(dev, "cannot enable vdda regulator\n");
520 goto err_slave;
521 }
522
523
524 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
525
526 if (IS_ENABLED(CONFIG_PCI_MSI)) {
527 u32 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
528
529 val |= BIT(31);
530 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
531 }
532
533 return 0;
534err_slave:
535 clk_disable_unprepare(res->slave_bus);
536err_master:
537 clk_disable_unprepare(res->master_bus);
538err_iface:
539 clk_disable_unprepare(res->iface);
540err_aux:
541 clk_disable_unprepare(res->aux);
542err_res:
543 reset_control_assert(res->core);
544
545 return ret;
546}
547
548static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie)
549{
550 u32 val;
551
552
553 val = readl(pcie->parf + PCIE20_PARF_LTSSM);
554 val |= BIT(8);
555 writel(val, pcie->parf + PCIE20_PARF_LTSSM);
556}
557
558static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
559{
560 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
561 struct dw_pcie *pci = pcie->pci;
562 struct device *dev = pci->dev;
563 int ret;
564
565 res->supplies[0].supply = "vdda";
566 res->supplies[1].supply = "vddpe-3v3";
567 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
568 res->supplies);
569 if (ret)
570 return ret;
571
572 res->aux_clk = devm_clk_get(dev, "aux");
573 if (IS_ERR(res->aux_clk))
574 return PTR_ERR(res->aux_clk);
575
576 res->cfg_clk = devm_clk_get(dev, "cfg");
577 if (IS_ERR(res->cfg_clk))
578 return PTR_ERR(res->cfg_clk);
579
580 res->master_clk = devm_clk_get(dev, "bus_master");
581 if (IS_ERR(res->master_clk))
582 return PTR_ERR(res->master_clk);
583
584 res->slave_clk = devm_clk_get(dev, "bus_slave");
585 if (IS_ERR(res->slave_clk))
586 return PTR_ERR(res->slave_clk);
587
588 res->pipe_clk = devm_clk_get(dev, "pipe");
589 return PTR_ERR_OR_ZERO(res->pipe_clk);
590}
591
592static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
593{
594 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
595
596 clk_disable_unprepare(res->slave_clk);
597 clk_disable_unprepare(res->master_clk);
598 clk_disable_unprepare(res->cfg_clk);
599 clk_disable_unprepare(res->aux_clk);
600
601 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
602}
603
604static void qcom_pcie_post_deinit_2_3_2(struct qcom_pcie *pcie)
605{
606 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
607
608 clk_disable_unprepare(res->pipe_clk);
609}
610
611static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
612{
613 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
614 struct dw_pcie *pci = pcie->pci;
615 struct device *dev = pci->dev;
616 u32 val;
617 int ret;
618
619 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
620 if (ret < 0) {
621 dev_err(dev, "cannot enable regulators\n");
622 return ret;
623 }
624
625 ret = clk_prepare_enable(res->aux_clk);
626 if (ret) {
627 dev_err(dev, "cannot prepare/enable aux clock\n");
628 goto err_aux_clk;
629 }
630
631 ret = clk_prepare_enable(res->cfg_clk);
632 if (ret) {
633 dev_err(dev, "cannot prepare/enable cfg clock\n");
634 goto err_cfg_clk;
635 }
636
637 ret = clk_prepare_enable(res->master_clk);
638 if (ret) {
639 dev_err(dev, "cannot prepare/enable master clock\n");
640 goto err_master_clk;
641 }
642
643 ret = clk_prepare_enable(res->slave_clk);
644 if (ret) {
645 dev_err(dev, "cannot prepare/enable slave clock\n");
646 goto err_slave_clk;
647 }
648
649
650 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
651 val &= ~BIT(0);
652 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
653
654
655 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
656
657
658 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
659 val &= ~BIT(29);
660 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
661
662 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
663 val |= BIT(4);
664 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
665
666 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
667 val |= BIT(31);
668 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
669
670 return 0;
671
672err_slave_clk:
673 clk_disable_unprepare(res->master_clk);
674err_master_clk:
675 clk_disable_unprepare(res->cfg_clk);
676err_cfg_clk:
677 clk_disable_unprepare(res->aux_clk);
678
679err_aux_clk:
680 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
681
682 return ret;
683}
684
685static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
686{
687 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
688 struct dw_pcie *pci = pcie->pci;
689 struct device *dev = pci->dev;
690 int ret;
691
692 ret = clk_prepare_enable(res->pipe_clk);
693 if (ret) {
694 dev_err(dev, "cannot prepare/enable pipe clock\n");
695 return ret;
696 }
697
698 return 0;
699}
700
701static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie)
702{
703 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
704 struct dw_pcie *pci = pcie->pci;
705 struct device *dev = pci->dev;
706 bool is_ipq = of_device_is_compatible(dev->of_node, "qcom,pcie-ipq4019");
707 int ret;
708
709 res->clks[0].id = "aux";
710 res->clks[1].id = "master_bus";
711 res->clks[2].id = "slave_bus";
712 res->clks[3].id = "iface";
713
714
715 res->num_clks = is_ipq ? 3 : 4;
716
717 ret = devm_clk_bulk_get(dev, res->num_clks, res->clks);
718 if (ret < 0)
719 return ret;
720
721 res->axi_m_reset = devm_reset_control_get_exclusive(dev, "axi_m");
722 if (IS_ERR(res->axi_m_reset))
723 return PTR_ERR(res->axi_m_reset);
724
725 res->axi_s_reset = devm_reset_control_get_exclusive(dev, "axi_s");
726 if (IS_ERR(res->axi_s_reset))
727 return PTR_ERR(res->axi_s_reset);
728
729 if (is_ipq) {
730
731
732
733
734 res->pipe_reset = devm_reset_control_get_exclusive(dev, "pipe");
735 if (IS_ERR(res->pipe_reset))
736 return PTR_ERR(res->pipe_reset);
737
738 res->axi_m_vmid_reset = devm_reset_control_get_exclusive(dev,
739 "axi_m_vmid");
740 if (IS_ERR(res->axi_m_vmid_reset))
741 return PTR_ERR(res->axi_m_vmid_reset);
742
743 res->axi_s_xpu_reset = devm_reset_control_get_exclusive(dev,
744 "axi_s_xpu");
745 if (IS_ERR(res->axi_s_xpu_reset))
746 return PTR_ERR(res->axi_s_xpu_reset);
747
748 res->parf_reset = devm_reset_control_get_exclusive(dev, "parf");
749 if (IS_ERR(res->parf_reset))
750 return PTR_ERR(res->parf_reset);
751
752 res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
753 if (IS_ERR(res->phy_reset))
754 return PTR_ERR(res->phy_reset);
755 }
756
757 res->axi_m_sticky_reset = devm_reset_control_get_exclusive(dev,
758 "axi_m_sticky");
759 if (IS_ERR(res->axi_m_sticky_reset))
760 return PTR_ERR(res->axi_m_sticky_reset);
761
762 res->pipe_sticky_reset = devm_reset_control_get_exclusive(dev,
763 "pipe_sticky");
764 if (IS_ERR(res->pipe_sticky_reset))
765 return PTR_ERR(res->pipe_sticky_reset);
766
767 res->pwr_reset = devm_reset_control_get_exclusive(dev, "pwr");
768 if (IS_ERR(res->pwr_reset))
769 return PTR_ERR(res->pwr_reset);
770
771 res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
772 if (IS_ERR(res->ahb_reset))
773 return PTR_ERR(res->ahb_reset);
774
775 if (is_ipq) {
776 res->phy_ahb_reset = devm_reset_control_get_exclusive(dev, "phy_ahb");
777 if (IS_ERR(res->phy_ahb_reset))
778 return PTR_ERR(res->phy_ahb_reset);
779 }
780
781 return 0;
782}
783
784static void qcom_pcie_deinit_2_4_0(struct qcom_pcie *pcie)
785{
786 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
787
788 reset_control_assert(res->axi_m_reset);
789 reset_control_assert(res->axi_s_reset);
790 reset_control_assert(res->pipe_reset);
791 reset_control_assert(res->pipe_sticky_reset);
792 reset_control_assert(res->phy_reset);
793 reset_control_assert(res->phy_ahb_reset);
794 reset_control_assert(res->axi_m_sticky_reset);
795 reset_control_assert(res->pwr_reset);
796 reset_control_assert(res->ahb_reset);
797 clk_bulk_disable_unprepare(res->num_clks, res->clks);
798}
799
800static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie)
801{
802 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
803 struct dw_pcie *pci = pcie->pci;
804 struct device *dev = pci->dev;
805 u32 val;
806 int ret;
807
808 ret = reset_control_assert(res->axi_m_reset);
809 if (ret) {
810 dev_err(dev, "cannot assert axi master reset\n");
811 return ret;
812 }
813
814 ret = reset_control_assert(res->axi_s_reset);
815 if (ret) {
816 dev_err(dev, "cannot assert axi slave reset\n");
817 return ret;
818 }
819
820 usleep_range(10000, 12000);
821
822 ret = reset_control_assert(res->pipe_reset);
823 if (ret) {
824 dev_err(dev, "cannot assert pipe reset\n");
825 return ret;
826 }
827
828 ret = reset_control_assert(res->pipe_sticky_reset);
829 if (ret) {
830 dev_err(dev, "cannot assert pipe sticky reset\n");
831 return ret;
832 }
833
834 ret = reset_control_assert(res->phy_reset);
835 if (ret) {
836 dev_err(dev, "cannot assert phy reset\n");
837 return ret;
838 }
839
840 ret = reset_control_assert(res->phy_ahb_reset);
841 if (ret) {
842 dev_err(dev, "cannot assert phy ahb reset\n");
843 return ret;
844 }
845
846 usleep_range(10000, 12000);
847
848 ret = reset_control_assert(res->axi_m_sticky_reset);
849 if (ret) {
850 dev_err(dev, "cannot assert axi master sticky reset\n");
851 return ret;
852 }
853
854 ret = reset_control_assert(res->pwr_reset);
855 if (ret) {
856 dev_err(dev, "cannot assert power reset\n");
857 return ret;
858 }
859
860 ret = reset_control_assert(res->ahb_reset);
861 if (ret) {
862 dev_err(dev, "cannot assert ahb reset\n");
863 return ret;
864 }
865
866 usleep_range(10000, 12000);
867
868 ret = reset_control_deassert(res->phy_ahb_reset);
869 if (ret) {
870 dev_err(dev, "cannot deassert phy ahb reset\n");
871 return ret;
872 }
873
874 ret = reset_control_deassert(res->phy_reset);
875 if (ret) {
876 dev_err(dev, "cannot deassert phy reset\n");
877 goto err_rst_phy;
878 }
879
880 ret = reset_control_deassert(res->pipe_reset);
881 if (ret) {
882 dev_err(dev, "cannot deassert pipe reset\n");
883 goto err_rst_pipe;
884 }
885
886 ret = reset_control_deassert(res->pipe_sticky_reset);
887 if (ret) {
888 dev_err(dev, "cannot deassert pipe sticky reset\n");
889 goto err_rst_pipe_sticky;
890 }
891
892 usleep_range(10000, 12000);
893
894 ret = reset_control_deassert(res->axi_m_reset);
895 if (ret) {
896 dev_err(dev, "cannot deassert axi master reset\n");
897 goto err_rst_axi_m;
898 }
899
900 ret = reset_control_deassert(res->axi_m_sticky_reset);
901 if (ret) {
902 dev_err(dev, "cannot deassert axi master sticky reset\n");
903 goto err_rst_axi_m_sticky;
904 }
905
906 ret = reset_control_deassert(res->axi_s_reset);
907 if (ret) {
908 dev_err(dev, "cannot deassert axi slave reset\n");
909 goto err_rst_axi_s;
910 }
911
912 ret = reset_control_deassert(res->pwr_reset);
913 if (ret) {
914 dev_err(dev, "cannot deassert power reset\n");
915 goto err_rst_pwr;
916 }
917
918 ret = reset_control_deassert(res->ahb_reset);
919 if (ret) {
920 dev_err(dev, "cannot deassert ahb reset\n");
921 goto err_rst_ahb;
922 }
923
924 usleep_range(10000, 12000);
925
926 ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
927 if (ret)
928 goto err_clks;
929
930
931 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
932 val &= ~BIT(0);
933 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
934
935
936 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
937
938
939 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
940 val &= ~BIT(29);
941 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
942
943 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
944 val |= BIT(4);
945 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
946
947 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
948 val |= BIT(31);
949 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
950
951 return 0;
952
953err_clks:
954 reset_control_assert(res->ahb_reset);
955err_rst_ahb:
956 reset_control_assert(res->pwr_reset);
957err_rst_pwr:
958 reset_control_assert(res->axi_s_reset);
959err_rst_axi_s:
960 reset_control_assert(res->axi_m_sticky_reset);
961err_rst_axi_m_sticky:
962 reset_control_assert(res->axi_m_reset);
963err_rst_axi_m:
964 reset_control_assert(res->pipe_sticky_reset);
965err_rst_pipe_sticky:
966 reset_control_assert(res->pipe_reset);
967err_rst_pipe:
968 reset_control_assert(res->phy_reset);
969err_rst_phy:
970 reset_control_assert(res->phy_ahb_reset);
971 return ret;
972}
973
974static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
975{
976 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
977 struct dw_pcie *pci = pcie->pci;
978 struct device *dev = pci->dev;
979 int i;
980 const char *rst_names[] = { "axi_m", "axi_s", "pipe",
981 "axi_m_sticky", "sticky",
982 "ahb", "sleep", };
983
984 res->iface = devm_clk_get(dev, "iface");
985 if (IS_ERR(res->iface))
986 return PTR_ERR(res->iface);
987
988 res->axi_m_clk = devm_clk_get(dev, "axi_m");
989 if (IS_ERR(res->axi_m_clk))
990 return PTR_ERR(res->axi_m_clk);
991
992 res->axi_s_clk = devm_clk_get(dev, "axi_s");
993 if (IS_ERR(res->axi_s_clk))
994 return PTR_ERR(res->axi_s_clk);
995
996 res->ahb_clk = devm_clk_get(dev, "ahb");
997 if (IS_ERR(res->ahb_clk))
998 return PTR_ERR(res->ahb_clk);
999
1000 res->aux_clk = devm_clk_get(dev, "aux");
1001 if (IS_ERR(res->aux_clk))
1002 return PTR_ERR(res->aux_clk);
1003
1004 for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
1005 res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
1006 if (IS_ERR(res->rst[i]))
1007 return PTR_ERR(res->rst[i]);
1008 }
1009
1010 return 0;
1011}
1012
1013static void qcom_pcie_deinit_2_3_3(struct qcom_pcie *pcie)
1014{
1015 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
1016
1017 clk_disable_unprepare(res->iface);
1018 clk_disable_unprepare(res->axi_m_clk);
1019 clk_disable_unprepare(res->axi_s_clk);
1020 clk_disable_unprepare(res->ahb_clk);
1021 clk_disable_unprepare(res->aux_clk);
1022}
1023
1024static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
1025{
1026 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
1027 struct dw_pcie *pci = pcie->pci;
1028 struct device *dev = pci->dev;
1029 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1030 int i, ret;
1031 u32 val;
1032
1033 for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
1034 ret = reset_control_assert(res->rst[i]);
1035 if (ret) {
1036 dev_err(dev, "reset #%d assert failed (%d)\n", i, ret);
1037 return ret;
1038 }
1039 }
1040
1041 usleep_range(2000, 2500);
1042
1043 for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
1044 ret = reset_control_deassert(res->rst[i]);
1045 if (ret) {
1046 dev_err(dev, "reset #%d deassert failed (%d)\n", i,
1047 ret);
1048 return ret;
1049 }
1050 }
1051
1052
1053
1054
1055
1056 usleep_range(2000, 2500);
1057
1058 ret = clk_prepare_enable(res->iface);
1059 if (ret) {
1060 dev_err(dev, "cannot prepare/enable core clock\n");
1061 goto err_clk_iface;
1062 }
1063
1064 ret = clk_prepare_enable(res->axi_m_clk);
1065 if (ret) {
1066 dev_err(dev, "cannot prepare/enable core clock\n");
1067 goto err_clk_axi_m;
1068 }
1069
1070 ret = clk_prepare_enable(res->axi_s_clk);
1071 if (ret) {
1072 dev_err(dev, "cannot prepare/enable axi slave clock\n");
1073 goto err_clk_axi_s;
1074 }
1075
1076 ret = clk_prepare_enable(res->ahb_clk);
1077 if (ret) {
1078 dev_err(dev, "cannot prepare/enable ahb clock\n");
1079 goto err_clk_ahb;
1080 }
1081
1082 ret = clk_prepare_enable(res->aux_clk);
1083 if (ret) {
1084 dev_err(dev, "cannot prepare/enable aux clock\n");
1085 goto err_clk_aux;
1086 }
1087
1088 writel(SLV_ADDR_SPACE_SZ,
1089 pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE);
1090
1091 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
1092 val &= ~BIT(0);
1093 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
1094
1095 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
1096
1097 writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS
1098 | SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
1099 AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
1100 pcie->parf + PCIE20_PARF_SYS_CTRL);
1101 writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
1102
1103 writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND);
1104 writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG);
1105 writel(PCIE_CAP_LINK1_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
1106
1107 val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
1108 val &= ~PCI_EXP_LNKCAP_ASPMS;
1109 writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP);
1110
1111 writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset +
1112 PCI_EXP_DEVCTL2);
1113
1114 return 0;
1115
1116err_clk_aux:
1117 clk_disable_unprepare(res->ahb_clk);
1118err_clk_ahb:
1119 clk_disable_unprepare(res->axi_s_clk);
1120err_clk_axi_s:
1121 clk_disable_unprepare(res->axi_m_clk);
1122err_clk_axi_m:
1123 clk_disable_unprepare(res->iface);
1124err_clk_iface:
1125
1126
1127
1128
1129 for (i = 0; i < ARRAY_SIZE(res->rst); i++)
1130 reset_control_assert(res->rst[i]);
1131
1132 return ret;
1133}
1134
1135static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
1136{
1137 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1138 struct dw_pcie *pci = pcie->pci;
1139 struct device *dev = pci->dev;
1140 int ret;
1141
1142 res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
1143 if (IS_ERR(res->pci_reset))
1144 return PTR_ERR(res->pci_reset);
1145
1146 res->supplies[0].supply = "vdda";
1147 res->supplies[1].supply = "vddpe-3v3";
1148 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
1149 res->supplies);
1150 if (ret)
1151 return ret;
1152
1153 res->clks[0].id = "aux";
1154 res->clks[1].id = "cfg";
1155 res->clks[2].id = "bus_master";
1156 res->clks[3].id = "bus_slave";
1157 res->clks[4].id = "slave_q2a";
1158 res->clks[5].id = "tbu";
1159 if (of_device_is_compatible(dev->of_node, "qcom,pcie-sm8250")) {
1160 res->clks[6].id = "ddrss_sf_tbu";
1161 res->num_clks = 7;
1162 } else {
1163 res->num_clks = 6;
1164 }
1165
1166 ret = devm_clk_bulk_get(dev, res->num_clks, res->clks);
1167 if (ret < 0)
1168 return ret;
1169
1170 res->pipe_clk = devm_clk_get(dev, "pipe");
1171 return PTR_ERR_OR_ZERO(res->pipe_clk);
1172}
1173
1174static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
1175{
1176 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1177 struct dw_pcie *pci = pcie->pci;
1178 struct device *dev = pci->dev;
1179 u32 val;
1180 int ret;
1181
1182 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
1183 if (ret < 0) {
1184 dev_err(dev, "cannot enable regulators\n");
1185 return ret;
1186 }
1187
1188 ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
1189 if (ret < 0)
1190 goto err_disable_regulators;
1191
1192 ret = reset_control_assert(res->pci_reset);
1193 if (ret < 0) {
1194 dev_err(dev, "cannot deassert pci reset\n");
1195 goto err_disable_clocks;
1196 }
1197
1198 usleep_range(1000, 1500);
1199
1200 ret = reset_control_deassert(res->pci_reset);
1201 if (ret < 0) {
1202 dev_err(dev, "cannot deassert pci reset\n");
1203 goto err_disable_clocks;
1204 }
1205
1206 ret = clk_prepare_enable(res->pipe_clk);
1207 if (ret) {
1208 dev_err(dev, "cannot prepare/enable pipe clock\n");
1209 goto err_disable_clocks;
1210 }
1211
1212
1213 writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE);
1214
1215
1216 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
1217 val &= ~BIT(0);
1218 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
1219
1220
1221 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
1222
1223
1224 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
1225 val &= ~BIT(29);
1226 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
1227
1228 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
1229 val |= BIT(4);
1230 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
1231
1232 if (IS_ENABLED(CONFIG_PCI_MSI)) {
1233 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
1234 val |= BIT(31);
1235 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
1236 }
1237
1238 return 0;
1239err_disable_clocks:
1240 clk_bulk_disable_unprepare(res->num_clks, res->clks);
1241err_disable_regulators:
1242 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
1243
1244 return ret;
1245}
1246
1247static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
1248{
1249 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1250
1251 clk_bulk_disable_unprepare(res->num_clks, res->clks);
1252 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
1253}
1254
1255static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie)
1256{
1257 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1258
1259 return clk_prepare_enable(res->pipe_clk);
1260}
1261
1262static void qcom_pcie_post_deinit_2_7_0(struct qcom_pcie *pcie)
1263{
1264 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1265
1266 clk_disable_unprepare(res->pipe_clk);
1267}
1268
1269static int qcom_pcie_link_up(struct dw_pcie *pci)
1270{
1271 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1272 u16 val = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA);
1273
1274 return !!(val & PCI_EXP_LNKSTA_DLLLA);
1275}
1276
1277static int qcom_pcie_config_sid_sm8250(struct qcom_pcie *pcie)
1278{
1279
1280 struct {
1281 u32 bdf;
1282 u32 phandle;
1283 u32 smmu_sid;
1284 u32 smmu_sid_len;
1285 } *map;
1286 void __iomem *bdf_to_sid_base = pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N;
1287 struct device *dev = pcie->pci->dev;
1288 u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE];
1289 int i, nr_map, size = 0;
1290 u32 smmu_sid_base;
1291
1292 of_get_property(dev->of_node, "iommu-map", &size);
1293 if (!size)
1294 return 0;
1295
1296 map = kzalloc(size, GFP_KERNEL);
1297 if (!map)
1298 return -ENOMEM;
1299
1300 of_property_read_u32_array(dev->of_node,
1301 "iommu-map", (u32 *)map, size / sizeof(u32));
1302
1303 nr_map = size / (sizeof(*map));
1304
1305 crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL);
1306
1307
1308 memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32));
1309
1310
1311 smmu_sid_base = map[0].smmu_sid;
1312
1313
1314 for (i = 0; i < nr_map; i++) {
1315 u16 bdf_be = cpu_to_be16(map[i].bdf);
1316 u32 val;
1317 u8 hash;
1318
1319 hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be),
1320 0);
1321
1322 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1323
1324
1325 while (val) {
1326 u8 current_hash = hash++;
1327 u8 next_mask = 0xff;
1328
1329
1330 if (!(val & next_mask)) {
1331 val |= (u32)hash;
1332 writel(val, bdf_to_sid_base + current_hash * sizeof(u32));
1333 }
1334
1335 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1336 }
1337
1338
1339 val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0;
1340 writel(val, bdf_to_sid_base + hash * sizeof(u32));
1341 }
1342
1343 kfree(map);
1344
1345 return 0;
1346}
1347
1348static int qcom_pcie_host_init(struct pcie_port *pp)
1349{
1350 struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
1351 struct qcom_pcie *pcie = to_qcom_pcie(pci);
1352 int ret;
1353
1354 qcom_ep_reset_assert(pcie);
1355
1356 ret = pcie->ops->init(pcie);
1357 if (ret)
1358 return ret;
1359
1360 ret = phy_power_on(pcie->phy);
1361 if (ret)
1362 goto err_deinit;
1363
1364 if (pcie->ops->post_init) {
1365 ret = pcie->ops->post_init(pcie);
1366 if (ret)
1367 goto err_disable_phy;
1368 }
1369
1370 qcom_ep_reset_deassert(pcie);
1371
1372 if (pcie->ops->config_sid) {
1373 ret = pcie->ops->config_sid(pcie);
1374 if (ret)
1375 goto err;
1376 }
1377
1378 return 0;
1379
1380err:
1381 qcom_ep_reset_assert(pcie);
1382 if (pcie->ops->post_deinit)
1383 pcie->ops->post_deinit(pcie);
1384err_disable_phy:
1385 phy_power_off(pcie->phy);
1386err_deinit:
1387 pcie->ops->deinit(pcie);
1388
1389 return ret;
1390}
1391
1392static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
1393 .host_init = qcom_pcie_host_init,
1394};
1395
1396
1397static const struct qcom_pcie_ops ops_2_1_0 = {
1398 .get_resources = qcom_pcie_get_resources_2_1_0,
1399 .init = qcom_pcie_init_2_1_0,
1400 .deinit = qcom_pcie_deinit_2_1_0,
1401 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1402};
1403
1404
1405static const struct qcom_pcie_ops ops_1_0_0 = {
1406 .get_resources = qcom_pcie_get_resources_1_0_0,
1407 .init = qcom_pcie_init_1_0_0,
1408 .deinit = qcom_pcie_deinit_1_0_0,
1409 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1410};
1411
1412
1413static const struct qcom_pcie_ops ops_2_3_2 = {
1414 .get_resources = qcom_pcie_get_resources_2_3_2,
1415 .init = qcom_pcie_init_2_3_2,
1416 .post_init = qcom_pcie_post_init_2_3_2,
1417 .deinit = qcom_pcie_deinit_2_3_2,
1418 .post_deinit = qcom_pcie_post_deinit_2_3_2,
1419 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1420};
1421
1422
1423static const struct qcom_pcie_ops ops_2_4_0 = {
1424 .get_resources = qcom_pcie_get_resources_2_4_0,
1425 .init = qcom_pcie_init_2_4_0,
1426 .deinit = qcom_pcie_deinit_2_4_0,
1427 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1428};
1429
1430
1431static const struct qcom_pcie_ops ops_2_3_3 = {
1432 .get_resources = qcom_pcie_get_resources_2_3_3,
1433 .init = qcom_pcie_init_2_3_3,
1434 .deinit = qcom_pcie_deinit_2_3_3,
1435 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1436};
1437
1438
1439static const struct qcom_pcie_ops ops_2_7_0 = {
1440 .get_resources = qcom_pcie_get_resources_2_7_0,
1441 .init = qcom_pcie_init_2_7_0,
1442 .deinit = qcom_pcie_deinit_2_7_0,
1443 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1444 .post_init = qcom_pcie_post_init_2_7_0,
1445 .post_deinit = qcom_pcie_post_deinit_2_7_0,
1446};
1447
1448
1449static const struct qcom_pcie_ops ops_1_9_0 = {
1450 .get_resources = qcom_pcie_get_resources_2_7_0,
1451 .init = qcom_pcie_init_2_7_0,
1452 .deinit = qcom_pcie_deinit_2_7_0,
1453 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1454 .post_init = qcom_pcie_post_init_2_7_0,
1455 .post_deinit = qcom_pcie_post_deinit_2_7_0,
1456 .config_sid = qcom_pcie_config_sid_sm8250,
1457};
1458
1459static const struct dw_pcie_ops dw_pcie_ops = {
1460 .link_up = qcom_pcie_link_up,
1461 .start_link = qcom_pcie_start_link,
1462};
1463
1464static int qcom_pcie_probe(struct platform_device *pdev)
1465{
1466 struct device *dev = &pdev->dev;
1467 struct pcie_port *pp;
1468 struct dw_pcie *pci;
1469 struct qcom_pcie *pcie;
1470 int ret;
1471
1472 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
1473 if (!pcie)
1474 return -ENOMEM;
1475
1476 pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
1477 if (!pci)
1478 return -ENOMEM;
1479
1480 pm_runtime_enable(dev);
1481 ret = pm_runtime_get_sync(dev);
1482 if (ret < 0)
1483 goto err_pm_runtime_put;
1484
1485 pci->dev = dev;
1486 pci->ops = &dw_pcie_ops;
1487 pp = &pci->pp;
1488
1489 pcie->pci = pci;
1490
1491 pcie->ops = of_device_get_match_data(dev);
1492
1493 pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
1494 if (IS_ERR(pcie->reset)) {
1495 ret = PTR_ERR(pcie->reset);
1496 goto err_pm_runtime_put;
1497 }
1498
1499 pcie->parf = devm_platform_ioremap_resource_byname(pdev, "parf");
1500 if (IS_ERR(pcie->parf)) {
1501 ret = PTR_ERR(pcie->parf);
1502 goto err_pm_runtime_put;
1503 }
1504
1505 pcie->elbi = devm_platform_ioremap_resource_byname(pdev, "elbi");
1506 if (IS_ERR(pcie->elbi)) {
1507 ret = PTR_ERR(pcie->elbi);
1508 goto err_pm_runtime_put;
1509 }
1510
1511 pcie->phy = devm_phy_optional_get(dev, "pciephy");
1512 if (IS_ERR(pcie->phy)) {
1513 ret = PTR_ERR(pcie->phy);
1514 goto err_pm_runtime_put;
1515 }
1516
1517 ret = pcie->ops->get_resources(pcie);
1518 if (ret)
1519 goto err_pm_runtime_put;
1520
1521 pp->ops = &qcom_pcie_dw_ops;
1522
1523 ret = phy_init(pcie->phy);
1524 if (ret) {
1525 pm_runtime_disable(&pdev->dev);
1526 goto err_pm_runtime_put;
1527 }
1528
1529 platform_set_drvdata(pdev, pcie);
1530
1531 ret = dw_pcie_host_init(pp);
1532 if (ret) {
1533 dev_err(dev, "cannot initialize host\n");
1534 pm_runtime_disable(&pdev->dev);
1535 goto err_pm_runtime_put;
1536 }
1537
1538 return 0;
1539
1540err_pm_runtime_put:
1541 pm_runtime_put(dev);
1542 pm_runtime_disable(dev);
1543
1544 return ret;
1545}
1546
1547static const struct of_device_id qcom_pcie_match[] = {
1548 { .compatible = "qcom,pcie-apq8084", .data = &ops_1_0_0 },
1549 { .compatible = "qcom,pcie-ipq8064", .data = &ops_2_1_0 },
1550 { .compatible = "qcom,pcie-ipq8064-v2", .data = &ops_2_1_0 },
1551 { .compatible = "qcom,pcie-apq8064", .data = &ops_2_1_0 },
1552 { .compatible = "qcom,pcie-msm8996", .data = &ops_2_3_2 },
1553 { .compatible = "qcom,pcie-ipq8074", .data = &ops_2_3_3 },
1554 { .compatible = "qcom,pcie-ipq4019", .data = &ops_2_4_0 },
1555 { .compatible = "qcom,pcie-qcs404", .data = &ops_2_4_0 },
1556 { .compatible = "qcom,pcie-sdm845", .data = &ops_2_7_0 },
1557 { .compatible = "qcom,pcie-sm8250", .data = &ops_1_9_0 },
1558 { }
1559};
1560
1561static void qcom_fixup_class(struct pci_dev *dev)
1562{
1563 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
1564}
1565DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0101, qcom_fixup_class);
1566DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0104, qcom_fixup_class);
1567DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0106, qcom_fixup_class);
1568DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0107, qcom_fixup_class);
1569DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class);
1570DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class);
1571DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class);
1572
1573static struct platform_driver qcom_pcie_driver = {
1574 .probe = qcom_pcie_probe,
1575 .driver = {
1576 .name = "qcom-pcie",
1577 .suppress_bind_attrs = true,
1578 .of_match_table = qcom_pcie_match,
1579 },
1580};
1581builtin_platform_driver(qcom_pcie_driver);
1582
