1 // SPDX-License-Identifier: GPL-2.0
3 * Qualcomm PCIe root complex driver
5 * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
6 * Copyright 2015 Linaro Limited.
8 * Author: Stanimir Varbanov <svarbanov@mm-sol.com>
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>
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>
31 #include "../../pci.h"
32 #include "pcie-designware.h"
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)
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)
48 #define PCIE20_PARF_PHY_REFCLK 0x4C
49 #define PHY_REFCLK_SSP_EN BIT(16)
50 #define PHY_REFCLK_USE_PAD BIT(12)
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
63 #define PCIE20_ELBI_SYS_CTRL 0x04
64 #define PCIE20_ELBI_SYS_CTRL_LT_ENABLE BIT(0)
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)
72 #define PCIE_CAP_LINK1_VAL 0x2FD7F
74 #define PCIE20_PARF_Q2A_FLUSH 0x1AC
76 #define PCIE20_MISC_CONTROL_1_REG 0x8BC
77 #define DBI_RO_WR_EN 1
79 #define PERST_DELAY_US 1000
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)
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)
90 #define PCIE20_PARF_CONFIG_BITS 0x50
91 #define PHY_RX0_EQ(x) ((x) << 24)
93 #define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
94 #define SLV_ADDR_SPACE_SZ 0x10000000
96 #define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xa0
98 #define DEVICE_TYPE_RC 0x4
100 #define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
101 #define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
103 #define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
105 struct 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];
116 struct qcom_pcie_resources_1_0_0 {
119 struct clk *master_bus;
120 struct clk *slave_bus;
121 struct reset_control *core;
122 struct regulator *vdda;
125 #define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
126 struct qcom_pcie_resources_2_3_2 {
128 struct clk *master_clk;
129 struct clk *slave_clk;
131 struct clk *pipe_clk;
132 struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
135 #define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
136 struct qcom_pcie_resources_2_4_0 {
137 struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS];
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;
153 struct qcom_pcie_resources_2_3_3 {
155 struct clk *axi_m_clk;
156 struct clk *axi_s_clk;
159 struct reset_control *rst[7];
162 struct qcom_pcie_resources_2_7_0 {
163 struct clk_bulk_data clks[6];
164 struct regulator_bulk_data supplies[2];
165 struct reset_control *pci_reset;
166 struct clk *pipe_clk;
169 union qcom_pcie_resources {
170 struct qcom_pcie_resources_1_0_0 v1_0_0;
171 struct qcom_pcie_resources_2_1_0 v2_1_0;
172 struct qcom_pcie_resources_2_3_2 v2_3_2;
173 struct qcom_pcie_resources_2_3_3 v2_3_3;
174 struct qcom_pcie_resources_2_4_0 v2_4_0;
175 struct qcom_pcie_resources_2_7_0 v2_7_0;
180 struct qcom_pcie_ops {
181 int (*get_resources)(struct qcom_pcie *pcie);
182 int (*init)(struct qcom_pcie *pcie);
183 int (*post_init)(struct qcom_pcie *pcie);
184 void (*deinit)(struct qcom_pcie *pcie);
185 void (*post_deinit)(struct qcom_pcie *pcie);
186 void (*ltssm_enable)(struct qcom_pcie *pcie);
187 int (*config_sid)(struct qcom_pcie *pcie);
192 void __iomem *parf; /* DT parf */
193 void __iomem *elbi; /* DT elbi */
194 union qcom_pcie_resources res;
196 struct gpio_desc *reset;
197 const struct qcom_pcie_ops *ops;
200 #define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
202 static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
204 gpiod_set_value_cansleep(pcie->reset, 1);
205 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
208 static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
210 /* Ensure that PERST has been asserted for at least 100 ms */
212 gpiod_set_value_cansleep(pcie->reset, 0);
213 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
216 static int qcom_pcie_start_link(struct dw_pcie *pci)
218 struct qcom_pcie *pcie = to_qcom_pcie(pci);
220 /* Enable Link Training state machine */
221 if (pcie->ops->ltssm_enable)
222 pcie->ops->ltssm_enable(pcie);
227 static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
231 /* enable link training */
232 val = readl(pcie->elbi + PCIE20_ELBI_SYS_CTRL);
233 val |= PCIE20_ELBI_SYS_CTRL_LT_ENABLE;
234 writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
237 static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
239 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
240 struct dw_pcie *pci = pcie->pci;
241 struct device *dev = pci->dev;
244 res->supplies[0].supply = "vdda";
245 res->supplies[1].supply = "vdda_phy";
246 res->supplies[2].supply = "vdda_refclk";
247 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
252 res->clks[0].id = "iface";
253 res->clks[1].id = "core";
254 res->clks[2].id = "phy";
255 res->clks[3].id = "aux";
256 res->clks[4].id = "ref";
258 /* iface, core, phy are required */
259 ret = devm_clk_bulk_get(dev, 3, res->clks);
263 /* aux, ref are optional */
264 ret = devm_clk_bulk_get_optional(dev, 2, res->clks + 3);
268 res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
269 if (IS_ERR(res->pci_reset))
270 return PTR_ERR(res->pci_reset);
272 res->axi_reset = devm_reset_control_get_exclusive(dev, "axi");
273 if (IS_ERR(res->axi_reset))
274 return PTR_ERR(res->axi_reset);
276 res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
277 if (IS_ERR(res->ahb_reset))
278 return PTR_ERR(res->ahb_reset);
280 res->por_reset = devm_reset_control_get_exclusive(dev, "por");
281 if (IS_ERR(res->por_reset))
282 return PTR_ERR(res->por_reset);
284 res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext");
285 if (IS_ERR(res->ext_reset))
286 return PTR_ERR(res->ext_reset);
288 res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
289 return PTR_ERR_OR_ZERO(res->phy_reset);
292 static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
294 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
296 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
297 reset_control_assert(res->pci_reset);
298 reset_control_assert(res->axi_reset);
299 reset_control_assert(res->ahb_reset);
300 reset_control_assert(res->por_reset);
301 reset_control_assert(res->ext_reset);
302 reset_control_assert(res->phy_reset);
304 writel(1, pcie->parf + PCIE20_PARF_PHY_CTRL);
306 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
309 static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
311 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
312 struct dw_pcie *pci = pcie->pci;
313 struct device *dev = pci->dev;
314 struct device_node *node = dev->of_node;
318 /* reset the PCIe interface as uboot can leave it undefined state */
319 reset_control_assert(res->pci_reset);
320 reset_control_assert(res->axi_reset);
321 reset_control_assert(res->ahb_reset);
322 reset_control_assert(res->por_reset);
323 reset_control_assert(res->ext_reset);
324 reset_control_assert(res->phy_reset);
326 writel(1, pcie->parf + PCIE20_PARF_PHY_CTRL);
328 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
330 dev_err(dev, "cannot enable regulators\n");
334 ret = reset_control_deassert(res->ahb_reset);
336 dev_err(dev, "cannot deassert ahb reset\n");
337 goto err_deassert_ahb;
340 ret = reset_control_deassert(res->ext_reset);
342 dev_err(dev, "cannot deassert ext reset\n");
343 goto err_deassert_ext;
346 ret = reset_control_deassert(res->phy_reset);
348 dev_err(dev, "cannot deassert phy reset\n");
349 goto err_deassert_phy;
352 ret = reset_control_deassert(res->pci_reset);
354 dev_err(dev, "cannot deassert pci reset\n");
355 goto err_deassert_pci;
358 ret = reset_control_deassert(res->por_reset);
360 dev_err(dev, "cannot deassert por reset\n");
361 goto err_deassert_por;
364 ret = reset_control_deassert(res->axi_reset);
366 dev_err(dev, "cannot deassert axi reset\n");
367 goto err_deassert_axi;
370 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
374 /* enable PCIe clocks and resets */
375 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
377 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
379 if (of_device_is_compatible(node, "qcom,pcie-ipq8064") ||
380 of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) {
381 writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
382 PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
383 PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
384 pcie->parf + PCIE20_PARF_PCS_DEEMPH);
385 writel(PCS_SWING_TX_SWING_FULL(120) |
386 PCS_SWING_TX_SWING_LOW(120),
387 pcie->parf + PCIE20_PARF_PCS_SWING);
388 writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
391 if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
392 /* set TX termination offset */
393 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
394 val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
395 val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
396 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
399 /* enable external reference clock */
400 val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
401 val &= ~PHY_REFCLK_USE_PAD;
402 val |= PHY_REFCLK_SSP_EN;
403 writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
405 /* wait for clock acquisition */
406 usleep_range(1000, 1500);
408 /* Set the Max TLP size to 2K, instead of using default of 4K */
409 writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
410 pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
411 writel(CFG_BRIDGE_SB_INIT,
412 pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
417 reset_control_assert(res->axi_reset);
419 reset_control_assert(res->por_reset);
421 reset_control_assert(res->pci_reset);
423 reset_control_assert(res->phy_reset);
425 reset_control_assert(res->ext_reset);
427 reset_control_assert(res->ahb_reset);
429 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
434 static int qcom_pcie_get_resources_1_0_0(struct qcom_pcie *pcie)
436 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
437 struct dw_pcie *pci = pcie->pci;
438 struct device *dev = pci->dev;
440 res->vdda = devm_regulator_get(dev, "vdda");
441 if (IS_ERR(res->vdda))
442 return PTR_ERR(res->vdda);
444 res->iface = devm_clk_get(dev, "iface");
445 if (IS_ERR(res->iface))
446 return PTR_ERR(res->iface);
448 res->aux = devm_clk_get(dev, "aux");
449 if (IS_ERR(res->aux))
450 return PTR_ERR(res->aux);
452 res->master_bus = devm_clk_get(dev, "master_bus");
453 if (IS_ERR(res->master_bus))
454 return PTR_ERR(res->master_bus);
456 res->slave_bus = devm_clk_get(dev, "slave_bus");
457 if (IS_ERR(res->slave_bus))
458 return PTR_ERR(res->slave_bus);
460 res->core = devm_reset_control_get_exclusive(dev, "core");
461 return PTR_ERR_OR_ZERO(res->core);
464 static void qcom_pcie_deinit_1_0_0(struct qcom_pcie *pcie)
466 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
468 reset_control_assert(res->core);
469 clk_disable_unprepare(res->slave_bus);
470 clk_disable_unprepare(res->master_bus);
471 clk_disable_unprepare(res->iface);
472 clk_disable_unprepare(res->aux);
473 regulator_disable(res->vdda);
476 static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie)
478 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
479 struct dw_pcie *pci = pcie->pci;
480 struct device *dev = pci->dev;
483 ret = reset_control_deassert(res->core);
485 dev_err(dev, "cannot deassert core reset\n");
489 ret = clk_prepare_enable(res->aux);
491 dev_err(dev, "cannot prepare/enable aux clock\n");
495 ret = clk_prepare_enable(res->iface);
497 dev_err(dev, "cannot prepare/enable iface clock\n");
501 ret = clk_prepare_enable(res->master_bus);
503 dev_err(dev, "cannot prepare/enable master_bus clock\n");
507 ret = clk_prepare_enable(res->slave_bus);
509 dev_err(dev, "cannot prepare/enable slave_bus clock\n");
513 ret = regulator_enable(res->vdda);
515 dev_err(dev, "cannot enable vdda regulator\n");
519 /* change DBI base address */
520 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
522 if (IS_ENABLED(CONFIG_PCI_MSI)) {
523 u32 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
526 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
531 clk_disable_unprepare(res->slave_bus);
533 clk_disable_unprepare(res->master_bus);
535 clk_disable_unprepare(res->iface);
537 clk_disable_unprepare(res->aux);
539 reset_control_assert(res->core);
544 static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie)
548 /* enable link training */
549 val = readl(pcie->parf + PCIE20_PARF_LTSSM);
551 writel(val, pcie->parf + PCIE20_PARF_LTSSM);
554 static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
556 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
557 struct dw_pcie *pci = pcie->pci;
558 struct device *dev = pci->dev;
561 res->supplies[0].supply = "vdda";
562 res->supplies[1].supply = "vddpe-3v3";
563 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
568 res->aux_clk = devm_clk_get(dev, "aux");
569 if (IS_ERR(res->aux_clk))
570 return PTR_ERR(res->aux_clk);
572 res->cfg_clk = devm_clk_get(dev, "cfg");
573 if (IS_ERR(res->cfg_clk))
574 return PTR_ERR(res->cfg_clk);
576 res->master_clk = devm_clk_get(dev, "bus_master");
577 if (IS_ERR(res->master_clk))
578 return PTR_ERR(res->master_clk);
580 res->slave_clk = devm_clk_get(dev, "bus_slave");
581 if (IS_ERR(res->slave_clk))
582 return PTR_ERR(res->slave_clk);
584 res->pipe_clk = devm_clk_get(dev, "pipe");
585 return PTR_ERR_OR_ZERO(res->pipe_clk);
588 static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
590 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
592 clk_disable_unprepare(res->slave_clk);
593 clk_disable_unprepare(res->master_clk);
594 clk_disable_unprepare(res->cfg_clk);
595 clk_disable_unprepare(res->aux_clk);
597 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
600 static void qcom_pcie_post_deinit_2_3_2(struct qcom_pcie *pcie)
602 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
604 clk_disable_unprepare(res->pipe_clk);
607 static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
609 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
610 struct dw_pcie *pci = pcie->pci;
611 struct device *dev = pci->dev;
615 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
617 dev_err(dev, "cannot enable regulators\n");
621 ret = clk_prepare_enable(res->aux_clk);
623 dev_err(dev, "cannot prepare/enable aux clock\n");
627 ret = clk_prepare_enable(res->cfg_clk);
629 dev_err(dev, "cannot prepare/enable cfg clock\n");
633 ret = clk_prepare_enable(res->master_clk);
635 dev_err(dev, "cannot prepare/enable master clock\n");
639 ret = clk_prepare_enable(res->slave_clk);
641 dev_err(dev, "cannot prepare/enable slave clock\n");
645 /* enable PCIe clocks and resets */
646 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
648 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
650 /* change DBI base address */
651 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
653 /* MAC PHY_POWERDOWN MUX DISABLE */
654 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
656 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
658 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
660 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
662 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
664 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
669 clk_disable_unprepare(res->master_clk);
671 clk_disable_unprepare(res->cfg_clk);
673 clk_disable_unprepare(res->aux_clk);
676 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
681 static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
683 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
684 struct dw_pcie *pci = pcie->pci;
685 struct device *dev = pci->dev;
688 ret = clk_prepare_enable(res->pipe_clk);
690 dev_err(dev, "cannot prepare/enable pipe clock\n");
697 static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie)
699 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
700 struct dw_pcie *pci = pcie->pci;
701 struct device *dev = pci->dev;
702 bool is_ipq = of_device_is_compatible(dev->of_node, "qcom,pcie-ipq4019");
705 res->clks[0].id = "aux";
706 res->clks[1].id = "master_bus";
707 res->clks[2].id = "slave_bus";
708 res->clks[3].id = "iface";
710 /* qcom,pcie-ipq4019 is defined without "iface" */
711 res->num_clks = is_ipq ? 3 : 4;
713 ret = devm_clk_bulk_get(dev, res->num_clks, res->clks);
717 res->axi_m_reset = devm_reset_control_get_exclusive(dev, "axi_m");
718 if (IS_ERR(res->axi_m_reset))
719 return PTR_ERR(res->axi_m_reset);
721 res->axi_s_reset = devm_reset_control_get_exclusive(dev, "axi_s");
722 if (IS_ERR(res->axi_s_reset))
723 return PTR_ERR(res->axi_s_reset);
727 * These resources relates to the PHY or are secure clocks, but
728 * are controlled here for IPQ4019
730 res->pipe_reset = devm_reset_control_get_exclusive(dev, "pipe");
731 if (IS_ERR(res->pipe_reset))
732 return PTR_ERR(res->pipe_reset);
734 res->axi_m_vmid_reset = devm_reset_control_get_exclusive(dev,
736 if (IS_ERR(res->axi_m_vmid_reset))
737 return PTR_ERR(res->axi_m_vmid_reset);
739 res->axi_s_xpu_reset = devm_reset_control_get_exclusive(dev,
741 if (IS_ERR(res->axi_s_xpu_reset))
742 return PTR_ERR(res->axi_s_xpu_reset);
744 res->parf_reset = devm_reset_control_get_exclusive(dev, "parf");
745 if (IS_ERR(res->parf_reset))
746 return PTR_ERR(res->parf_reset);
748 res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
749 if (IS_ERR(res->phy_reset))
750 return PTR_ERR(res->phy_reset);
753 res->axi_m_sticky_reset = devm_reset_control_get_exclusive(dev,
755 if (IS_ERR(res->axi_m_sticky_reset))
756 return PTR_ERR(res->axi_m_sticky_reset);
758 res->pipe_sticky_reset = devm_reset_control_get_exclusive(dev,
760 if (IS_ERR(res->pipe_sticky_reset))
761 return PTR_ERR(res->pipe_sticky_reset);
763 res->pwr_reset = devm_reset_control_get_exclusive(dev, "pwr");
764 if (IS_ERR(res->pwr_reset))
765 return PTR_ERR(res->pwr_reset);
767 res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
768 if (IS_ERR(res->ahb_reset))
769 return PTR_ERR(res->ahb_reset);
772 res->phy_ahb_reset = devm_reset_control_get_exclusive(dev, "phy_ahb");
773 if (IS_ERR(res->phy_ahb_reset))
774 return PTR_ERR(res->phy_ahb_reset);
780 static void qcom_pcie_deinit_2_4_0(struct qcom_pcie *pcie)
782 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
784 reset_control_assert(res->axi_m_reset);
785 reset_control_assert(res->axi_s_reset);
786 reset_control_assert(res->pipe_reset);
787 reset_control_assert(res->pipe_sticky_reset);
788 reset_control_assert(res->phy_reset);
789 reset_control_assert(res->phy_ahb_reset);
790 reset_control_assert(res->axi_m_sticky_reset);
791 reset_control_assert(res->pwr_reset);
792 reset_control_assert(res->ahb_reset);
793 clk_bulk_disable_unprepare(res->num_clks, res->clks);
796 static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie)
798 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
799 struct dw_pcie *pci = pcie->pci;
800 struct device *dev = pci->dev;
804 ret = reset_control_assert(res->axi_m_reset);
806 dev_err(dev, "cannot assert axi master reset\n");
810 ret = reset_control_assert(res->axi_s_reset);
812 dev_err(dev, "cannot assert axi slave reset\n");
816 usleep_range(10000, 12000);
818 ret = reset_control_assert(res->pipe_reset);
820 dev_err(dev, "cannot assert pipe reset\n");
824 ret = reset_control_assert(res->pipe_sticky_reset);
826 dev_err(dev, "cannot assert pipe sticky reset\n");
830 ret = reset_control_assert(res->phy_reset);
832 dev_err(dev, "cannot assert phy reset\n");
836 ret = reset_control_assert(res->phy_ahb_reset);
838 dev_err(dev, "cannot assert phy ahb reset\n");
842 usleep_range(10000, 12000);
844 ret = reset_control_assert(res->axi_m_sticky_reset);
846 dev_err(dev, "cannot assert axi master sticky reset\n");
850 ret = reset_control_assert(res->pwr_reset);
852 dev_err(dev, "cannot assert power reset\n");
856 ret = reset_control_assert(res->ahb_reset);
858 dev_err(dev, "cannot assert ahb reset\n");
862 usleep_range(10000, 12000);
864 ret = reset_control_deassert(res->phy_ahb_reset);
866 dev_err(dev, "cannot deassert phy ahb reset\n");
870 ret = reset_control_deassert(res->phy_reset);
872 dev_err(dev, "cannot deassert phy reset\n");
876 ret = reset_control_deassert(res->pipe_reset);
878 dev_err(dev, "cannot deassert pipe reset\n");
882 ret = reset_control_deassert(res->pipe_sticky_reset);
884 dev_err(dev, "cannot deassert pipe sticky reset\n");
885 goto err_rst_pipe_sticky;
888 usleep_range(10000, 12000);
890 ret = reset_control_deassert(res->axi_m_reset);
892 dev_err(dev, "cannot deassert axi master reset\n");
896 ret = reset_control_deassert(res->axi_m_sticky_reset);
898 dev_err(dev, "cannot deassert axi master sticky reset\n");
899 goto err_rst_axi_m_sticky;
902 ret = reset_control_deassert(res->axi_s_reset);
904 dev_err(dev, "cannot deassert axi slave reset\n");
908 ret = reset_control_deassert(res->pwr_reset);
910 dev_err(dev, "cannot deassert power reset\n");
914 ret = reset_control_deassert(res->ahb_reset);
916 dev_err(dev, "cannot deassert ahb reset\n");
920 usleep_range(10000, 12000);
922 ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
926 /* enable PCIe clocks and resets */
927 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
929 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
931 /* change DBI base address */
932 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
934 /* MAC PHY_POWERDOWN MUX DISABLE */
935 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
937 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
939 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
941 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
943 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
945 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
950 reset_control_assert(res->ahb_reset);
952 reset_control_assert(res->pwr_reset);
954 reset_control_assert(res->axi_s_reset);
956 reset_control_assert(res->axi_m_sticky_reset);
957 err_rst_axi_m_sticky:
958 reset_control_assert(res->axi_m_reset);
960 reset_control_assert(res->pipe_sticky_reset);
962 reset_control_assert(res->pipe_reset);
964 reset_control_assert(res->phy_reset);
966 reset_control_assert(res->phy_ahb_reset);
970 static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
972 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
973 struct dw_pcie *pci = pcie->pci;
974 struct device *dev = pci->dev;
976 const char *rst_names[] = { "axi_m", "axi_s", "pipe",
977 "axi_m_sticky", "sticky",
980 res->iface = devm_clk_get(dev, "iface");
981 if (IS_ERR(res->iface))
982 return PTR_ERR(res->iface);
984 res->axi_m_clk = devm_clk_get(dev, "axi_m");
985 if (IS_ERR(res->axi_m_clk))
986 return PTR_ERR(res->axi_m_clk);
988 res->axi_s_clk = devm_clk_get(dev, "axi_s");
989 if (IS_ERR(res->axi_s_clk))
990 return PTR_ERR(res->axi_s_clk);
992 res->ahb_clk = devm_clk_get(dev, "ahb");
993 if (IS_ERR(res->ahb_clk))
994 return PTR_ERR(res->ahb_clk);
996 res->aux_clk = devm_clk_get(dev, "aux");
997 if (IS_ERR(res->aux_clk))
998 return PTR_ERR(res->aux_clk);
1000 for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
1001 res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
1002 if (IS_ERR(res->rst[i]))
1003 return PTR_ERR(res->rst[i]);
1009 static void qcom_pcie_deinit_2_3_3(struct qcom_pcie *pcie)
1011 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
1013 clk_disable_unprepare(res->iface);
1014 clk_disable_unprepare(res->axi_m_clk);
1015 clk_disable_unprepare(res->axi_s_clk);
1016 clk_disable_unprepare(res->ahb_clk);
1017 clk_disable_unprepare(res->aux_clk);
1020 static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
1022 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
1023 struct dw_pcie *pci = pcie->pci;
1024 struct device *dev = pci->dev;
1025 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1029 for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
1030 ret = reset_control_assert(res->rst[i]);
1032 dev_err(dev, "reset #%d assert failed (%d)\n", i, ret);
1037 usleep_range(2000, 2500);
1039 for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
1040 ret = reset_control_deassert(res->rst[i]);
1042 dev_err(dev, "reset #%d deassert failed (%d)\n", i,
1049 * Don't have a way to see if the reset has completed.
1050 * Wait for some time.
1052 usleep_range(2000, 2500);
1054 ret = clk_prepare_enable(res->iface);
1056 dev_err(dev, "cannot prepare/enable core clock\n");
1060 ret = clk_prepare_enable(res->axi_m_clk);
1062 dev_err(dev, "cannot prepare/enable core clock\n");
1066 ret = clk_prepare_enable(res->axi_s_clk);
1068 dev_err(dev, "cannot prepare/enable axi slave clock\n");
1072 ret = clk_prepare_enable(res->ahb_clk);
1074 dev_err(dev, "cannot prepare/enable ahb clock\n");
1078 ret = clk_prepare_enable(res->aux_clk);
1080 dev_err(dev, "cannot prepare/enable aux clock\n");
1084 writel(SLV_ADDR_SPACE_SZ,
1085 pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE);
1087 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
1089 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
1091 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
1093 writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS
1094 | SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
1095 AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
1096 pcie->parf + PCIE20_PARF_SYS_CTRL);
1097 writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
1099 writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND);
1100 writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG);
1101 writel(PCIE_CAP_LINK1_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
1103 val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
1104 val &= ~PCI_EXP_LNKCAP_ASPMS;
1105 writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP);
1107 writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset +
1113 clk_disable_unprepare(res->ahb_clk);
1115 clk_disable_unprepare(res->axi_s_clk);
1117 clk_disable_unprepare(res->axi_m_clk);
1119 clk_disable_unprepare(res->iface);
1122 * Not checking for failure, will anyway return
1123 * the original failure in 'ret'.
1125 for (i = 0; i < ARRAY_SIZE(res->rst); i++)
1126 reset_control_assert(res->rst[i]);
1131 static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
1133 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1134 struct dw_pcie *pci = pcie->pci;
1135 struct device *dev = pci->dev;
1138 res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
1139 if (IS_ERR(res->pci_reset))
1140 return PTR_ERR(res->pci_reset);
1142 res->supplies[0].supply = "vdda";
1143 res->supplies[1].supply = "vddpe-3v3";
1144 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
1149 res->clks[0].id = "aux";
1150 res->clks[1].id = "cfg";
1151 res->clks[2].id = "bus_master";
1152 res->clks[3].id = "bus_slave";
1153 res->clks[4].id = "slave_q2a";
1154 res->clks[5].id = "tbu";
1156 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
1160 res->pipe_clk = devm_clk_get(dev, "pipe");
1161 return PTR_ERR_OR_ZERO(res->pipe_clk);
1164 static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
1166 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1167 struct dw_pcie *pci = pcie->pci;
1168 struct device *dev = pci->dev;
1172 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
1174 dev_err(dev, "cannot enable regulators\n");
1178 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
1180 goto err_disable_regulators;
1182 ret = reset_control_assert(res->pci_reset);
1184 dev_err(dev, "cannot deassert pci reset\n");
1185 goto err_disable_clocks;
1188 usleep_range(1000, 1500);
1190 ret = reset_control_deassert(res->pci_reset);
1192 dev_err(dev, "cannot deassert pci reset\n");
1193 goto err_disable_clocks;
1196 ret = clk_prepare_enable(res->pipe_clk);
1198 dev_err(dev, "cannot prepare/enable pipe clock\n");
1199 goto err_disable_clocks;
1202 /* configure PCIe to RC mode */
1203 writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE);
1205 /* enable PCIe clocks and resets */
1206 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
1208 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
1210 /* change DBI base address */
1211 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
1213 /* MAC PHY_POWERDOWN MUX DISABLE */
1214 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
1216 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
1218 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
1220 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
1222 if (IS_ENABLED(CONFIG_PCI_MSI)) {
1223 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
1225 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
1230 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
1231 err_disable_regulators:
1232 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
1237 static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
1239 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1241 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
1242 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
1245 static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie)
1247 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1249 return clk_prepare_enable(res->pipe_clk);
1252 static void qcom_pcie_post_deinit_2_7_0(struct qcom_pcie *pcie)
1254 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1256 clk_disable_unprepare(res->pipe_clk);
1259 static int qcom_pcie_link_up(struct dw_pcie *pci)
1261 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1262 u16 val = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA);
1264 return !!(val & PCI_EXP_LNKSTA_DLLLA);
1267 static int qcom_pcie_config_sid_sm8250(struct qcom_pcie *pcie)
1269 /* iommu map structure */
1276 void __iomem *bdf_to_sid_base = pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N;
1277 struct device *dev = pcie->pci->dev;
1278 u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE];
1279 int i, nr_map, size = 0;
1282 of_get_property(dev->of_node, "iommu-map", &size);
1286 map = kzalloc(size, GFP_KERNEL);
1290 of_property_read_u32_array(dev->of_node,
1291 "iommu-map", (u32 *)map, size / sizeof(u32));
1293 nr_map = size / (sizeof(*map));
1295 crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL);
1297 /* Registers need to be zero out first */
1298 memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32));
1300 /* Extract the SMMU SID base from the first entry of iommu-map */
1301 smmu_sid_base = map[0].smmu_sid;
1303 /* Look for an available entry to hold the mapping */
1304 for (i = 0; i < nr_map; i++) {
1305 u16 bdf_be = cpu_to_be16(map[i].bdf);
1309 hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be),
1312 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1314 /* If the register is already populated, look for next available entry */
1316 u8 current_hash = hash++;
1317 u8 next_mask = 0xff;
1319 /* If NEXT field is NULL then update it with next hash */
1320 if (!(val & next_mask)) {
1322 writel(val, bdf_to_sid_base + current_hash * sizeof(u32));
1325 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1328 /* BDF [31:16] | SID [15:8] | NEXT [7:0] */
1329 val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0;
1330 writel(val, bdf_to_sid_base + hash * sizeof(u32));
1338 static int qcom_pcie_host_init(struct pcie_port *pp)
1340 struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
1341 struct qcom_pcie *pcie = to_qcom_pcie(pci);
1344 qcom_ep_reset_assert(pcie);
1346 ret = pcie->ops->init(pcie);
1350 ret = phy_power_on(pcie->phy);
1354 if (pcie->ops->post_init) {
1355 ret = pcie->ops->post_init(pcie);
1357 goto err_disable_phy;
1360 qcom_ep_reset_deassert(pcie);
1362 if (pcie->ops->config_sid) {
1363 ret = pcie->ops->config_sid(pcie);
1371 qcom_ep_reset_assert(pcie);
1372 if (pcie->ops->post_deinit)
1373 pcie->ops->post_deinit(pcie);
1375 phy_power_off(pcie->phy);
1377 pcie->ops->deinit(pcie);
1382 static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
1383 .host_init = qcom_pcie_host_init,
1386 /* Qcom IP rev.: 2.1.0 Synopsys IP rev.: 4.01a */
1387 static const struct qcom_pcie_ops ops_2_1_0 = {
1388 .get_resources = qcom_pcie_get_resources_2_1_0,
1389 .init = qcom_pcie_init_2_1_0,
1390 .deinit = qcom_pcie_deinit_2_1_0,
1391 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1394 /* Qcom IP rev.: 1.0.0 Synopsys IP rev.: 4.11a */
1395 static const struct qcom_pcie_ops ops_1_0_0 = {
1396 .get_resources = qcom_pcie_get_resources_1_0_0,
1397 .init = qcom_pcie_init_1_0_0,
1398 .deinit = qcom_pcie_deinit_1_0_0,
1399 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1402 /* Qcom IP rev.: 2.3.2 Synopsys IP rev.: 4.21a */
1403 static const struct qcom_pcie_ops ops_2_3_2 = {
1404 .get_resources = qcom_pcie_get_resources_2_3_2,
1405 .init = qcom_pcie_init_2_3_2,
1406 .post_init = qcom_pcie_post_init_2_3_2,
1407 .deinit = qcom_pcie_deinit_2_3_2,
1408 .post_deinit = qcom_pcie_post_deinit_2_3_2,
1409 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1412 /* Qcom IP rev.: 2.4.0 Synopsys IP rev.: 4.20a */
1413 static const struct qcom_pcie_ops ops_2_4_0 = {
1414 .get_resources = qcom_pcie_get_resources_2_4_0,
1415 .init = qcom_pcie_init_2_4_0,
1416 .deinit = qcom_pcie_deinit_2_4_0,
1417 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1420 /* Qcom IP rev.: 2.3.3 Synopsys IP rev.: 4.30a */
1421 static const struct qcom_pcie_ops ops_2_3_3 = {
1422 .get_resources = qcom_pcie_get_resources_2_3_3,
1423 .init = qcom_pcie_init_2_3_3,
1424 .deinit = qcom_pcie_deinit_2_3_3,
1425 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1428 /* Qcom IP rev.: 2.7.0 Synopsys IP rev.: 4.30a */
1429 static const struct qcom_pcie_ops ops_2_7_0 = {
1430 .get_resources = qcom_pcie_get_resources_2_7_0,
1431 .init = qcom_pcie_init_2_7_0,
1432 .deinit = qcom_pcie_deinit_2_7_0,
1433 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1434 .post_init = qcom_pcie_post_init_2_7_0,
1435 .post_deinit = qcom_pcie_post_deinit_2_7_0,
1438 /* Qcom IP rev.: 1.9.0 */
1439 static const struct qcom_pcie_ops ops_1_9_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 .config_sid = qcom_pcie_config_sid_sm8250,
1449 static const struct dw_pcie_ops dw_pcie_ops = {
1450 .link_up = qcom_pcie_link_up,
1451 .start_link = qcom_pcie_start_link,
1454 static int qcom_pcie_probe(struct platform_device *pdev)
1456 struct device *dev = &pdev->dev;
1457 struct pcie_port *pp;
1458 struct dw_pcie *pci;
1459 struct qcom_pcie *pcie;
1462 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
1466 pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
1470 pm_runtime_enable(dev);
1471 ret = pm_runtime_get_sync(dev);
1473 goto err_pm_runtime_put;
1476 pci->ops = &dw_pcie_ops;
1481 pcie->ops = of_device_get_match_data(dev);
1483 pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
1484 if (IS_ERR(pcie->reset)) {
1485 ret = PTR_ERR(pcie->reset);
1486 goto err_pm_runtime_put;
1489 pcie->parf = devm_platform_ioremap_resource_byname(pdev, "parf");
1490 if (IS_ERR(pcie->parf)) {
1491 ret = PTR_ERR(pcie->parf);
1492 goto err_pm_runtime_put;
1495 pcie->elbi = devm_platform_ioremap_resource_byname(pdev, "elbi");
1496 if (IS_ERR(pcie->elbi)) {
1497 ret = PTR_ERR(pcie->elbi);
1498 goto err_pm_runtime_put;
1501 pcie->phy = devm_phy_optional_get(dev, "pciephy");
1502 if (IS_ERR(pcie->phy)) {
1503 ret = PTR_ERR(pcie->phy);
1504 goto err_pm_runtime_put;
1507 ret = pcie->ops->get_resources(pcie);
1509 goto err_pm_runtime_put;
1511 pp->ops = &qcom_pcie_dw_ops;
1513 ret = phy_init(pcie->phy);
1515 pm_runtime_disable(&pdev->dev);
1516 goto err_pm_runtime_put;
1519 platform_set_drvdata(pdev, pcie);
1521 ret = dw_pcie_host_init(pp);
1523 dev_err(dev, "cannot initialize host\n");
1524 pm_runtime_disable(&pdev->dev);
1525 goto err_pm_runtime_put;
1531 pm_runtime_put(dev);
1532 pm_runtime_disable(dev);
1537 static const struct of_device_id qcom_pcie_match[] = {
1538 { .compatible = "qcom,pcie-apq8084", .data = &ops_1_0_0 },
1539 { .compatible = "qcom,pcie-ipq8064", .data = &ops_2_1_0 },
1540 { .compatible = "qcom,pcie-ipq8064-v2", .data = &ops_2_1_0 },
1541 { .compatible = "qcom,pcie-apq8064", .data = &ops_2_1_0 },
1542 { .compatible = "qcom,pcie-msm8996", .data = &ops_2_3_2 },
1543 { .compatible = "qcom,pcie-ipq8074", .data = &ops_2_3_3 },
1544 { .compatible = "qcom,pcie-ipq4019", .data = &ops_2_4_0 },
1545 { .compatible = "qcom,pcie-qcs404", .data = &ops_2_4_0 },
1546 { .compatible = "qcom,pcie-sdm845", .data = &ops_2_7_0 },
1547 { .compatible = "qcom,pcie-sm8250", .data = &ops_1_9_0 },
1551 static void qcom_fixup_class(struct pci_dev *dev)
1553 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
1555 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0101, qcom_fixup_class);
1556 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0104, qcom_fixup_class);
1557 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0106, qcom_fixup_class);
1558 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0107, qcom_fixup_class);
1559 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class);
1560 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class);
1561 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class);
1563 static struct platform_driver qcom_pcie_driver = {
1564 .probe = qcom_pcie_probe,
1566 .name = "qcom-pcie",
1567 .suppress_bind_attrs = true,
1568 .of_match_table = qcom_pcie_match,
1571 builtin_platform_driver(qcom_pcie_driver);