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_PM_CTRL 0x20
45 #define REQ_NOT_ENTR_L1 BIT(5)
47 #define PCIE20_PARF_PHY_CTRL 0x40
48 #define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
49 #define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
51 #define PCIE20_PARF_PHY_REFCLK 0x4C
52 #define PHY_REFCLK_SSP_EN BIT(16)
53 #define PHY_REFCLK_USE_PAD BIT(12)
55 #define PCIE20_PARF_DBI_BASE_ADDR 0x168
56 #define PCIE20_PARF_SLV_ADDR_SPACE_SIZE 0x16C
57 #define PCIE20_PARF_MHI_CLOCK_RESET_CTRL 0x174
58 #define AHB_CLK_EN BIT(0)
59 #define MSTR_AXI_CLK_EN BIT(1)
62 #define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT 0x178
63 #define PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1A8
64 #define PCIE20_PARF_LTSSM 0x1B0
65 #define PCIE20_PARF_SID_OFFSET 0x234
66 #define PCIE20_PARF_BDF_TRANSLATE_CFG 0x24C
67 #define PCIE20_PARF_DEVICE_TYPE 0x1000
68 #define PCIE20_PARF_BDF_TO_SID_TABLE_N 0x2000
70 #define PCIE20_ELBI_SYS_CTRL 0x04
71 #define PCIE20_ELBI_SYS_CTRL_LT_ENABLE BIT(0)
73 #define PCIE20_AXI_MSTR_RESP_COMP_CTRL0 0x818
74 #define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4
75 #define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5
76 #define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c
77 #define CFG_BRIDGE_SB_INIT BIT(0)
79 #define PCIE_CAP_SLOT_POWER_LIMIT_VAL FIELD_PREP(PCI_EXP_SLTCAP_SPLV, \
81 #define PCIE_CAP_SLOT_POWER_LIMIT_SCALE FIELD_PREP(PCI_EXP_SLTCAP_SPLS, \
83 #define PCIE_CAP_SLOT_VAL (PCI_EXP_SLTCAP_ABP | \
84 PCI_EXP_SLTCAP_PCP | \
85 PCI_EXP_SLTCAP_MRLSP | \
86 PCI_EXP_SLTCAP_AIP | \
87 PCI_EXP_SLTCAP_PIP | \
88 PCI_EXP_SLTCAP_HPS | \
89 PCI_EXP_SLTCAP_HPC | \
90 PCI_EXP_SLTCAP_EIP | \
91 PCIE_CAP_SLOT_POWER_LIMIT_VAL | \
92 PCIE_CAP_SLOT_POWER_LIMIT_SCALE)
94 #define PCIE20_PARF_Q2A_FLUSH 0x1AC
96 #define PCIE20_MISC_CONTROL_1_REG 0x8BC
97 #define DBI_RO_WR_EN 1
99 #define PERST_DELAY_US 1000
101 #define PCIE20_PARF_PCS_DEEMPH 0x34
102 #define PCS_DEEMPH_TX_DEEMPH_GEN1(x) ((x) << 16)
103 #define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) ((x) << 8)
104 #define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) ((x) << 0)
106 #define PCIE20_PARF_PCS_SWING 0x38
107 #define PCS_SWING_TX_SWING_FULL(x) ((x) << 8)
108 #define PCS_SWING_TX_SWING_LOW(x) ((x) << 0)
110 #define PCIE20_PARF_CONFIG_BITS 0x50
111 #define PHY_RX0_EQ(x) ((x) << 24)
113 #define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
114 #define SLV_ADDR_SPACE_SZ 0x10000000
116 #define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xa0
118 #define DEVICE_TYPE_RC 0x4
120 #define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
121 #define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
123 #define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
125 struct qcom_pcie_resources_2_1_0 {
126 struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
127 struct reset_control *pci_reset;
128 struct reset_control *axi_reset;
129 struct reset_control *ahb_reset;
130 struct reset_control *por_reset;
131 struct reset_control *phy_reset;
132 struct reset_control *ext_reset;
133 struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
136 struct qcom_pcie_resources_1_0_0 {
139 struct clk *master_bus;
140 struct clk *slave_bus;
141 struct reset_control *core;
142 struct regulator *vdda;
145 #define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
146 struct qcom_pcie_resources_2_3_2 {
148 struct clk *master_clk;
149 struct clk *slave_clk;
151 struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
154 #define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
155 struct qcom_pcie_resources_2_4_0 {
156 struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS];
158 struct reset_control *axi_m_reset;
159 struct reset_control *axi_s_reset;
160 struct reset_control *pipe_reset;
161 struct reset_control *axi_m_vmid_reset;
162 struct reset_control *axi_s_xpu_reset;
163 struct reset_control *parf_reset;
164 struct reset_control *phy_reset;
165 struct reset_control *axi_m_sticky_reset;
166 struct reset_control *pipe_sticky_reset;
167 struct reset_control *pwr_reset;
168 struct reset_control *ahb_reset;
169 struct reset_control *phy_ahb_reset;
172 struct qcom_pcie_resources_2_3_3 {
174 struct clk *axi_m_clk;
175 struct clk *axi_s_clk;
178 struct reset_control *rst[7];
181 /* 6 clocks typically, 7 for sm8250 */
182 struct qcom_pcie_resources_2_7_0 {
183 struct clk_bulk_data clks[9];
185 struct regulator_bulk_data supplies[2];
186 struct reset_control *pci_reset;
189 struct qcom_pcie_resources_2_9_0 {
190 struct clk_bulk_data clks[5];
191 struct reset_control *rst;
194 union qcom_pcie_resources {
195 struct qcom_pcie_resources_1_0_0 v1_0_0;
196 struct qcom_pcie_resources_2_1_0 v2_1_0;
197 struct qcom_pcie_resources_2_3_2 v2_3_2;
198 struct qcom_pcie_resources_2_3_3 v2_3_3;
199 struct qcom_pcie_resources_2_4_0 v2_4_0;
200 struct qcom_pcie_resources_2_7_0 v2_7_0;
201 struct qcom_pcie_resources_2_9_0 v2_9_0;
206 struct qcom_pcie_ops {
207 int (*get_resources)(struct qcom_pcie *pcie);
208 int (*init)(struct qcom_pcie *pcie);
209 int (*post_init)(struct qcom_pcie *pcie);
210 void (*deinit)(struct qcom_pcie *pcie);
211 void (*post_deinit)(struct qcom_pcie *pcie);
212 void (*ltssm_enable)(struct qcom_pcie *pcie);
213 int (*config_sid)(struct qcom_pcie *pcie);
216 struct qcom_pcie_cfg {
217 const struct qcom_pcie_ops *ops;
218 unsigned int has_tbu_clk:1;
219 unsigned int has_ddrss_sf_tbu_clk:1;
220 unsigned int has_aggre0_clk:1;
221 unsigned int has_aggre1_clk:1;
226 void __iomem *parf; /* DT parf */
227 void __iomem *elbi; /* DT elbi */
228 union qcom_pcie_resources res;
230 struct gpio_desc *reset;
231 const struct qcom_pcie_cfg *cfg;
234 #define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
236 static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
238 gpiod_set_value_cansleep(pcie->reset, 1);
239 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
242 static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
244 /* Ensure that PERST has been asserted for at least 100 ms */
246 gpiod_set_value_cansleep(pcie->reset, 0);
247 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
250 static int qcom_pcie_start_link(struct dw_pcie *pci)
252 struct qcom_pcie *pcie = to_qcom_pcie(pci);
254 /* Enable Link Training state machine */
255 if (pcie->cfg->ops->ltssm_enable)
256 pcie->cfg->ops->ltssm_enable(pcie);
261 static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
265 /* enable link training */
266 val = readl(pcie->elbi + PCIE20_ELBI_SYS_CTRL);
267 val |= PCIE20_ELBI_SYS_CTRL_LT_ENABLE;
268 writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
271 static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
273 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
274 struct dw_pcie *pci = pcie->pci;
275 struct device *dev = pci->dev;
278 res->supplies[0].supply = "vdda";
279 res->supplies[1].supply = "vdda_phy";
280 res->supplies[2].supply = "vdda_refclk";
281 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
286 res->clks[0].id = "iface";
287 res->clks[1].id = "core";
288 res->clks[2].id = "phy";
289 res->clks[3].id = "aux";
290 res->clks[4].id = "ref";
292 /* iface, core, phy are required */
293 ret = devm_clk_bulk_get(dev, 3, res->clks);
297 /* aux, ref are optional */
298 ret = devm_clk_bulk_get_optional(dev, 2, res->clks + 3);
302 res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
303 if (IS_ERR(res->pci_reset))
304 return PTR_ERR(res->pci_reset);
306 res->axi_reset = devm_reset_control_get_exclusive(dev, "axi");
307 if (IS_ERR(res->axi_reset))
308 return PTR_ERR(res->axi_reset);
310 res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
311 if (IS_ERR(res->ahb_reset))
312 return PTR_ERR(res->ahb_reset);
314 res->por_reset = devm_reset_control_get_exclusive(dev, "por");
315 if (IS_ERR(res->por_reset))
316 return PTR_ERR(res->por_reset);
318 res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext");
319 if (IS_ERR(res->ext_reset))
320 return PTR_ERR(res->ext_reset);
322 res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
323 return PTR_ERR_OR_ZERO(res->phy_reset);
326 static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
328 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
330 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
331 reset_control_assert(res->pci_reset);
332 reset_control_assert(res->axi_reset);
333 reset_control_assert(res->ahb_reset);
334 reset_control_assert(res->por_reset);
335 reset_control_assert(res->ext_reset);
336 reset_control_assert(res->phy_reset);
338 writel(1, pcie->parf + PCIE20_PARF_PHY_CTRL);
340 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
343 static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
345 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
346 struct dw_pcie *pci = pcie->pci;
347 struct device *dev = pci->dev;
350 /* reset the PCIe interface as uboot can leave it undefined state */
351 reset_control_assert(res->pci_reset);
352 reset_control_assert(res->axi_reset);
353 reset_control_assert(res->ahb_reset);
354 reset_control_assert(res->por_reset);
355 reset_control_assert(res->ext_reset);
356 reset_control_assert(res->phy_reset);
358 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
360 dev_err(dev, "cannot enable regulators\n");
364 ret = reset_control_deassert(res->ahb_reset);
366 dev_err(dev, "cannot deassert ahb reset\n");
367 goto err_deassert_ahb;
370 ret = reset_control_deassert(res->ext_reset);
372 dev_err(dev, "cannot deassert ext reset\n");
373 goto err_deassert_ext;
376 ret = reset_control_deassert(res->phy_reset);
378 dev_err(dev, "cannot deassert phy reset\n");
379 goto err_deassert_phy;
382 ret = reset_control_deassert(res->pci_reset);
384 dev_err(dev, "cannot deassert pci reset\n");
385 goto err_deassert_pci;
388 ret = reset_control_deassert(res->por_reset);
390 dev_err(dev, "cannot deassert por reset\n");
391 goto err_deassert_por;
394 ret = reset_control_deassert(res->axi_reset);
396 dev_err(dev, "cannot deassert axi reset\n");
397 goto err_deassert_axi;
403 reset_control_assert(res->por_reset);
405 reset_control_assert(res->pci_reset);
407 reset_control_assert(res->phy_reset);
409 reset_control_assert(res->ext_reset);
411 reset_control_assert(res->ahb_reset);
413 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
418 static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie)
420 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
421 struct dw_pcie *pci = pcie->pci;
422 struct device *dev = pci->dev;
423 struct device_node *node = dev->of_node;
427 /* enable PCIe clocks and resets */
428 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
430 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
432 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
436 if (of_device_is_compatible(node, "qcom,pcie-ipq8064") ||
437 of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) {
438 writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
439 PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
440 PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
441 pcie->parf + PCIE20_PARF_PCS_DEEMPH);
442 writel(PCS_SWING_TX_SWING_FULL(120) |
443 PCS_SWING_TX_SWING_LOW(120),
444 pcie->parf + PCIE20_PARF_PCS_SWING);
445 writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
448 if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
449 /* set TX termination offset */
450 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
451 val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
452 val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
453 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
456 /* enable external reference clock */
457 val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
458 /* USE_PAD is required only for ipq806x */
459 if (!of_device_is_compatible(node, "qcom,pcie-apq8064"))
460 val &= ~PHY_REFCLK_USE_PAD;
461 val |= PHY_REFCLK_SSP_EN;
462 writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
464 /* wait for clock acquisition */
465 usleep_range(1000, 1500);
467 /* Set the Max TLP size to 2K, instead of using default of 4K */
468 writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
469 pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
470 writel(CFG_BRIDGE_SB_INIT,
471 pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
476 static int qcom_pcie_get_resources_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;
482 res->vdda = devm_regulator_get(dev, "vdda");
483 if (IS_ERR(res->vdda))
484 return PTR_ERR(res->vdda);
486 res->iface = devm_clk_get(dev, "iface");
487 if (IS_ERR(res->iface))
488 return PTR_ERR(res->iface);
490 res->aux = devm_clk_get(dev, "aux");
491 if (IS_ERR(res->aux))
492 return PTR_ERR(res->aux);
494 res->master_bus = devm_clk_get(dev, "master_bus");
495 if (IS_ERR(res->master_bus))
496 return PTR_ERR(res->master_bus);
498 res->slave_bus = devm_clk_get(dev, "slave_bus");
499 if (IS_ERR(res->slave_bus))
500 return PTR_ERR(res->slave_bus);
502 res->core = devm_reset_control_get_exclusive(dev, "core");
503 return PTR_ERR_OR_ZERO(res->core);
506 static void qcom_pcie_deinit_1_0_0(struct qcom_pcie *pcie)
508 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
510 reset_control_assert(res->core);
511 clk_disable_unprepare(res->slave_bus);
512 clk_disable_unprepare(res->master_bus);
513 clk_disable_unprepare(res->iface);
514 clk_disable_unprepare(res->aux);
515 regulator_disable(res->vdda);
518 static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie)
520 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
521 struct dw_pcie *pci = pcie->pci;
522 struct device *dev = pci->dev;
525 ret = reset_control_deassert(res->core);
527 dev_err(dev, "cannot deassert core reset\n");
531 ret = clk_prepare_enable(res->aux);
533 dev_err(dev, "cannot prepare/enable aux clock\n");
537 ret = clk_prepare_enable(res->iface);
539 dev_err(dev, "cannot prepare/enable iface clock\n");
543 ret = clk_prepare_enable(res->master_bus);
545 dev_err(dev, "cannot prepare/enable master_bus clock\n");
549 ret = clk_prepare_enable(res->slave_bus);
551 dev_err(dev, "cannot prepare/enable slave_bus clock\n");
555 ret = regulator_enable(res->vdda);
557 dev_err(dev, "cannot enable vdda regulator\n");
563 clk_disable_unprepare(res->slave_bus);
565 clk_disable_unprepare(res->master_bus);
567 clk_disable_unprepare(res->iface);
569 clk_disable_unprepare(res->aux);
571 reset_control_assert(res->core);
576 static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie)
578 /* change DBI base address */
579 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
581 if (IS_ENABLED(CONFIG_PCI_MSI)) {
582 u32 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
585 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
591 static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie)
595 /* enable link training */
596 val = readl(pcie->parf + PCIE20_PARF_LTSSM);
598 writel(val, pcie->parf + PCIE20_PARF_LTSSM);
601 static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
603 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
604 struct dw_pcie *pci = pcie->pci;
605 struct device *dev = pci->dev;
608 res->supplies[0].supply = "vdda";
609 res->supplies[1].supply = "vddpe-3v3";
610 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
615 res->aux_clk = devm_clk_get(dev, "aux");
616 if (IS_ERR(res->aux_clk))
617 return PTR_ERR(res->aux_clk);
619 res->cfg_clk = devm_clk_get(dev, "cfg");
620 if (IS_ERR(res->cfg_clk))
621 return PTR_ERR(res->cfg_clk);
623 res->master_clk = devm_clk_get(dev, "bus_master");
624 if (IS_ERR(res->master_clk))
625 return PTR_ERR(res->master_clk);
627 res->slave_clk = devm_clk_get(dev, "bus_slave");
628 if (IS_ERR(res->slave_clk))
629 return PTR_ERR(res->slave_clk);
634 static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
636 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
638 clk_disable_unprepare(res->slave_clk);
639 clk_disable_unprepare(res->master_clk);
640 clk_disable_unprepare(res->cfg_clk);
641 clk_disable_unprepare(res->aux_clk);
643 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
646 static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
648 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
649 struct dw_pcie *pci = pcie->pci;
650 struct device *dev = pci->dev;
653 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
655 dev_err(dev, "cannot enable regulators\n");
659 ret = clk_prepare_enable(res->aux_clk);
661 dev_err(dev, "cannot prepare/enable aux clock\n");
665 ret = clk_prepare_enable(res->cfg_clk);
667 dev_err(dev, "cannot prepare/enable cfg clock\n");
671 ret = clk_prepare_enable(res->master_clk);
673 dev_err(dev, "cannot prepare/enable master clock\n");
677 ret = clk_prepare_enable(res->slave_clk);
679 dev_err(dev, "cannot prepare/enable slave clock\n");
686 clk_disable_unprepare(res->master_clk);
688 clk_disable_unprepare(res->cfg_clk);
690 clk_disable_unprepare(res->aux_clk);
693 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
698 static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
702 /* enable PCIe clocks and resets */
703 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
705 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
707 /* change DBI base address */
708 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
710 /* MAC PHY_POWERDOWN MUX DISABLE */
711 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
713 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
715 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
717 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
719 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
721 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
726 static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie)
728 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
729 struct dw_pcie *pci = pcie->pci;
730 struct device *dev = pci->dev;
731 bool is_ipq = of_device_is_compatible(dev->of_node, "qcom,pcie-ipq4019");
734 res->clks[0].id = "aux";
735 res->clks[1].id = "master_bus";
736 res->clks[2].id = "slave_bus";
737 res->clks[3].id = "iface";
739 /* qcom,pcie-ipq4019 is defined without "iface" */
740 res->num_clks = is_ipq ? 3 : 4;
742 ret = devm_clk_bulk_get(dev, res->num_clks, res->clks);
746 res->axi_m_reset = devm_reset_control_get_exclusive(dev, "axi_m");
747 if (IS_ERR(res->axi_m_reset))
748 return PTR_ERR(res->axi_m_reset);
750 res->axi_s_reset = devm_reset_control_get_exclusive(dev, "axi_s");
751 if (IS_ERR(res->axi_s_reset))
752 return PTR_ERR(res->axi_s_reset);
756 * These resources relates to the PHY or are secure clocks, but
757 * are controlled here for IPQ4019
759 res->pipe_reset = devm_reset_control_get_exclusive(dev, "pipe");
760 if (IS_ERR(res->pipe_reset))
761 return PTR_ERR(res->pipe_reset);
763 res->axi_m_vmid_reset = devm_reset_control_get_exclusive(dev,
765 if (IS_ERR(res->axi_m_vmid_reset))
766 return PTR_ERR(res->axi_m_vmid_reset);
768 res->axi_s_xpu_reset = devm_reset_control_get_exclusive(dev,
770 if (IS_ERR(res->axi_s_xpu_reset))
771 return PTR_ERR(res->axi_s_xpu_reset);
773 res->parf_reset = devm_reset_control_get_exclusive(dev, "parf");
774 if (IS_ERR(res->parf_reset))
775 return PTR_ERR(res->parf_reset);
777 res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
778 if (IS_ERR(res->phy_reset))
779 return PTR_ERR(res->phy_reset);
782 res->axi_m_sticky_reset = devm_reset_control_get_exclusive(dev,
784 if (IS_ERR(res->axi_m_sticky_reset))
785 return PTR_ERR(res->axi_m_sticky_reset);
787 res->pipe_sticky_reset = devm_reset_control_get_exclusive(dev,
789 if (IS_ERR(res->pipe_sticky_reset))
790 return PTR_ERR(res->pipe_sticky_reset);
792 res->pwr_reset = devm_reset_control_get_exclusive(dev, "pwr");
793 if (IS_ERR(res->pwr_reset))
794 return PTR_ERR(res->pwr_reset);
796 res->ahb_reset = devm_reset_control_get_exclusive(dev, "ahb");
797 if (IS_ERR(res->ahb_reset))
798 return PTR_ERR(res->ahb_reset);
801 res->phy_ahb_reset = devm_reset_control_get_exclusive(dev, "phy_ahb");
802 if (IS_ERR(res->phy_ahb_reset))
803 return PTR_ERR(res->phy_ahb_reset);
809 static void qcom_pcie_deinit_2_4_0(struct qcom_pcie *pcie)
811 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
813 reset_control_assert(res->axi_m_reset);
814 reset_control_assert(res->axi_s_reset);
815 reset_control_assert(res->pipe_reset);
816 reset_control_assert(res->pipe_sticky_reset);
817 reset_control_assert(res->phy_reset);
818 reset_control_assert(res->phy_ahb_reset);
819 reset_control_assert(res->axi_m_sticky_reset);
820 reset_control_assert(res->pwr_reset);
821 reset_control_assert(res->ahb_reset);
822 clk_bulk_disable_unprepare(res->num_clks, res->clks);
825 static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie)
827 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
828 struct dw_pcie *pci = pcie->pci;
829 struct device *dev = pci->dev;
832 ret = reset_control_assert(res->axi_m_reset);
834 dev_err(dev, "cannot assert axi master reset\n");
838 ret = reset_control_assert(res->axi_s_reset);
840 dev_err(dev, "cannot assert axi slave reset\n");
844 usleep_range(10000, 12000);
846 ret = reset_control_assert(res->pipe_reset);
848 dev_err(dev, "cannot assert pipe reset\n");
852 ret = reset_control_assert(res->pipe_sticky_reset);
854 dev_err(dev, "cannot assert pipe sticky reset\n");
858 ret = reset_control_assert(res->phy_reset);
860 dev_err(dev, "cannot assert phy reset\n");
864 ret = reset_control_assert(res->phy_ahb_reset);
866 dev_err(dev, "cannot assert phy ahb reset\n");
870 usleep_range(10000, 12000);
872 ret = reset_control_assert(res->axi_m_sticky_reset);
874 dev_err(dev, "cannot assert axi master sticky reset\n");
878 ret = reset_control_assert(res->pwr_reset);
880 dev_err(dev, "cannot assert power reset\n");
884 ret = reset_control_assert(res->ahb_reset);
886 dev_err(dev, "cannot assert ahb reset\n");
890 usleep_range(10000, 12000);
892 ret = reset_control_deassert(res->phy_ahb_reset);
894 dev_err(dev, "cannot deassert phy ahb reset\n");
898 ret = reset_control_deassert(res->phy_reset);
900 dev_err(dev, "cannot deassert phy reset\n");
904 ret = reset_control_deassert(res->pipe_reset);
906 dev_err(dev, "cannot deassert pipe reset\n");
910 ret = reset_control_deassert(res->pipe_sticky_reset);
912 dev_err(dev, "cannot deassert pipe sticky reset\n");
913 goto err_rst_pipe_sticky;
916 usleep_range(10000, 12000);
918 ret = reset_control_deassert(res->axi_m_reset);
920 dev_err(dev, "cannot deassert axi master reset\n");
924 ret = reset_control_deassert(res->axi_m_sticky_reset);
926 dev_err(dev, "cannot deassert axi master sticky reset\n");
927 goto err_rst_axi_m_sticky;
930 ret = reset_control_deassert(res->axi_s_reset);
932 dev_err(dev, "cannot deassert axi slave reset\n");
936 ret = reset_control_deassert(res->pwr_reset);
938 dev_err(dev, "cannot deassert power reset\n");
942 ret = reset_control_deassert(res->ahb_reset);
944 dev_err(dev, "cannot deassert ahb reset\n");
948 usleep_range(10000, 12000);
950 ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
957 reset_control_assert(res->ahb_reset);
959 reset_control_assert(res->pwr_reset);
961 reset_control_assert(res->axi_s_reset);
963 reset_control_assert(res->axi_m_sticky_reset);
964 err_rst_axi_m_sticky:
965 reset_control_assert(res->axi_m_reset);
967 reset_control_assert(res->pipe_sticky_reset);
969 reset_control_assert(res->pipe_reset);
971 reset_control_assert(res->phy_reset);
973 reset_control_assert(res->phy_ahb_reset);
977 static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
981 /* enable PCIe clocks and resets */
982 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
984 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
986 /* change DBI base address */
987 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
989 /* MAC PHY_POWERDOWN MUX DISABLE */
990 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
992 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
994 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
996 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
998 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
1000 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT_V2);
1005 static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
1007 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
1008 struct dw_pcie *pci = pcie->pci;
1009 struct device *dev = pci->dev;
1011 const char *rst_names[] = { "axi_m", "axi_s", "pipe",
1012 "axi_m_sticky", "sticky",
1015 res->iface = devm_clk_get(dev, "iface");
1016 if (IS_ERR(res->iface))
1017 return PTR_ERR(res->iface);
1019 res->axi_m_clk = devm_clk_get(dev, "axi_m");
1020 if (IS_ERR(res->axi_m_clk))
1021 return PTR_ERR(res->axi_m_clk);
1023 res->axi_s_clk = devm_clk_get(dev, "axi_s");
1024 if (IS_ERR(res->axi_s_clk))
1025 return PTR_ERR(res->axi_s_clk);
1027 res->ahb_clk = devm_clk_get(dev, "ahb");
1028 if (IS_ERR(res->ahb_clk))
1029 return PTR_ERR(res->ahb_clk);
1031 res->aux_clk = devm_clk_get(dev, "aux");
1032 if (IS_ERR(res->aux_clk))
1033 return PTR_ERR(res->aux_clk);
1035 for (i = 0; i < ARRAY_SIZE(rst_names); i++) {
1036 res->rst[i] = devm_reset_control_get(dev, rst_names[i]);
1037 if (IS_ERR(res->rst[i]))
1038 return PTR_ERR(res->rst[i]);
1044 static void qcom_pcie_deinit_2_3_3(struct qcom_pcie *pcie)
1046 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
1048 clk_disable_unprepare(res->iface);
1049 clk_disable_unprepare(res->axi_m_clk);
1050 clk_disable_unprepare(res->axi_s_clk);
1051 clk_disable_unprepare(res->ahb_clk);
1052 clk_disable_unprepare(res->aux_clk);
1055 static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
1057 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
1058 struct dw_pcie *pci = pcie->pci;
1059 struct device *dev = pci->dev;
1062 for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
1063 ret = reset_control_assert(res->rst[i]);
1065 dev_err(dev, "reset #%d assert failed (%d)\n", i, ret);
1070 usleep_range(2000, 2500);
1072 for (i = 0; i < ARRAY_SIZE(res->rst); i++) {
1073 ret = reset_control_deassert(res->rst[i]);
1075 dev_err(dev, "reset #%d deassert failed (%d)\n", i,
1082 * Don't have a way to see if the reset has completed.
1083 * Wait for some time.
1085 usleep_range(2000, 2500);
1087 ret = clk_prepare_enable(res->iface);
1089 dev_err(dev, "cannot prepare/enable core clock\n");
1093 ret = clk_prepare_enable(res->axi_m_clk);
1095 dev_err(dev, "cannot prepare/enable core clock\n");
1099 ret = clk_prepare_enable(res->axi_s_clk);
1101 dev_err(dev, "cannot prepare/enable axi slave clock\n");
1105 ret = clk_prepare_enable(res->ahb_clk);
1107 dev_err(dev, "cannot prepare/enable ahb clock\n");
1111 ret = clk_prepare_enable(res->aux_clk);
1113 dev_err(dev, "cannot prepare/enable aux clock\n");
1120 clk_disable_unprepare(res->ahb_clk);
1122 clk_disable_unprepare(res->axi_s_clk);
1124 clk_disable_unprepare(res->axi_m_clk);
1126 clk_disable_unprepare(res->iface);
1129 * Not checking for failure, will anyway return
1130 * the original failure in 'ret'.
1132 for (i = 0; i < ARRAY_SIZE(res->rst); i++)
1133 reset_control_assert(res->rst[i]);
1138 static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie)
1140 struct dw_pcie *pci = pcie->pci;
1141 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1144 writel(SLV_ADDR_SPACE_SZ,
1145 pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE);
1147 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
1149 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
1151 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
1153 writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS
1154 | SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
1155 AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
1156 pcie->parf + PCIE20_PARF_SYS_CTRL);
1157 writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
1159 writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND);
1160 writel(DBI_RO_WR_EN, pci->dbi_base + PCIE20_MISC_CONTROL_1_REG);
1161 writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
1163 val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
1164 val &= ~PCI_EXP_LNKCAP_ASPMS;
1165 writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP);
1167 writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset +
1173 static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
1175 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1176 struct dw_pcie *pci = pcie->pci;
1177 struct device *dev = pci->dev;
1181 res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
1182 if (IS_ERR(res->pci_reset))
1183 return PTR_ERR(res->pci_reset);
1185 res->supplies[0].supply = "vdda";
1186 res->supplies[1].supply = "vddpe-3v3";
1187 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
1193 res->clks[idx++].id = "aux";
1194 res->clks[idx++].id = "cfg";
1195 res->clks[idx++].id = "bus_master";
1196 res->clks[idx++].id = "bus_slave";
1197 res->clks[idx++].id = "slave_q2a";
1198 if (pcie->cfg->has_tbu_clk)
1199 res->clks[idx++].id = "tbu";
1200 if (pcie->cfg->has_ddrss_sf_tbu_clk)
1201 res->clks[idx++].id = "ddrss_sf_tbu";
1202 if (pcie->cfg->has_aggre0_clk)
1203 res->clks[idx++].id = "aggre0";
1204 if (pcie->cfg->has_aggre1_clk)
1205 res->clks[idx++].id = "aggre1";
1207 res->num_clks = idx;
1209 ret = devm_clk_bulk_get(dev, res->num_clks, res->clks);
1216 static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
1218 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1219 struct dw_pcie *pci = pcie->pci;
1220 struct device *dev = pci->dev;
1224 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
1226 dev_err(dev, "cannot enable regulators\n");
1230 ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
1232 goto err_disable_regulators;
1234 ret = reset_control_assert(res->pci_reset);
1236 dev_err(dev, "cannot deassert pci reset\n");
1237 goto err_disable_clocks;
1240 usleep_range(1000, 1500);
1242 ret = reset_control_deassert(res->pci_reset);
1244 dev_err(dev, "cannot deassert pci reset\n");
1245 goto err_disable_clocks;
1248 /* Wait for reset to complete, required on SM8450 */
1249 usleep_range(1000, 1500);
1251 /* configure PCIe to RC mode */
1252 writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE);
1254 /* enable PCIe clocks and resets */
1255 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
1257 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
1259 /* change DBI base address */
1260 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
1262 /* MAC PHY_POWERDOWN MUX DISABLE */
1263 val = readl(pcie->parf + PCIE20_PARF_SYS_CTRL);
1265 writel(val, pcie->parf + PCIE20_PARF_SYS_CTRL);
1267 val = readl(pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
1269 writel(val, pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
1271 /* Enable L1 and L1SS */
1272 val = readl(pcie->parf + PCIE20_PARF_PM_CTRL);
1273 val &= ~REQ_NOT_ENTR_L1;
1274 writel(val, pcie->parf + PCIE20_PARF_PM_CTRL);
1276 if (IS_ENABLED(CONFIG_PCI_MSI)) {
1277 val = readl(pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
1279 writel(val, pcie->parf + PCIE20_PARF_AXI_MSTR_WR_ADDR_HALT);
1284 clk_bulk_disable_unprepare(res->num_clks, res->clks);
1285 err_disable_regulators:
1286 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
1291 static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
1293 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
1295 clk_bulk_disable_unprepare(res->num_clks, res->clks);
1297 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
1300 static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie)
1302 struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
1303 struct dw_pcie *pci = pcie->pci;
1304 struct device *dev = pci->dev;
1307 res->clks[0].id = "iface";
1308 res->clks[1].id = "axi_m";
1309 res->clks[2].id = "axi_s";
1310 res->clks[3].id = "axi_bridge";
1311 res->clks[4].id = "rchng";
1313 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
1317 res->rst = devm_reset_control_array_get_exclusive(dev);
1318 if (IS_ERR(res->rst))
1319 return PTR_ERR(res->rst);
1324 static void qcom_pcie_deinit_2_9_0(struct qcom_pcie *pcie)
1326 struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
1328 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
1331 static int qcom_pcie_init_2_9_0(struct qcom_pcie *pcie)
1333 struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
1334 struct device *dev = pcie->pci->dev;
1337 ret = reset_control_assert(res->rst);
1339 dev_err(dev, "reset assert failed (%d)\n", ret);
1344 * Delay periods before and after reset deassert are working values
1345 * from downstream Codeaurora kernel
1347 usleep_range(2000, 2500);
1349 ret = reset_control_deassert(res->rst);
1351 dev_err(dev, "reset deassert failed (%d)\n", ret);
1355 usleep_range(2000, 2500);
1357 return clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
1360 static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie)
1362 struct dw_pcie *pci = pcie->pci;
1363 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1367 writel(SLV_ADDR_SPACE_SZ,
1368 pcie->parf + PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE);
1370 val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
1372 writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
1374 writel(0, pcie->parf + PCIE20_PARF_DBI_BASE_ADDR);
1376 writel(DEVICE_TYPE_RC, pcie->parf + PCIE20_PARF_DEVICE_TYPE);
1377 writel(BYPASS | MSTR_AXI_CLK_EN | AHB_CLK_EN,
1378 pcie->parf + PCIE20_PARF_MHI_CLOCK_RESET_CTRL);
1379 writel(GEN3_RELATED_OFF_RXEQ_RGRDLESS_RXTS |
1380 GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL,
1381 pci->dbi_base + GEN3_RELATED_OFF);
1383 writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS |
1384 SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
1385 AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
1386 pcie->parf + PCIE20_PARF_SYS_CTRL);
1388 writel(0, pcie->parf + PCIE20_PARF_Q2A_FLUSH);
1390 dw_pcie_dbi_ro_wr_en(pci);
1391 writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
1393 val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
1394 val &= ~PCI_EXP_LNKCAP_ASPMS;
1395 writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP);
1397 writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset +
1400 for (i = 0; i < 256; i++)
1401 writel(0, pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N + (4 * i));
1406 static int qcom_pcie_link_up(struct dw_pcie *pci)
1408 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1409 u16 val = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA);
1411 return !!(val & PCI_EXP_LNKSTA_DLLLA);
1414 static int qcom_pcie_config_sid_sm8250(struct qcom_pcie *pcie)
1416 /* iommu map structure */
1423 void __iomem *bdf_to_sid_base = pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N;
1424 struct device *dev = pcie->pci->dev;
1425 u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE];
1426 int i, nr_map, size = 0;
1429 of_get_property(dev->of_node, "iommu-map", &size);
1433 map = kzalloc(size, GFP_KERNEL);
1437 of_property_read_u32_array(dev->of_node,
1438 "iommu-map", (u32 *)map, size / sizeof(u32));
1440 nr_map = size / (sizeof(*map));
1442 crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL);
1444 /* Registers need to be zero out first */
1445 memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32));
1447 /* Extract the SMMU SID base from the first entry of iommu-map */
1448 smmu_sid_base = map[0].smmu_sid;
1450 /* Look for an available entry to hold the mapping */
1451 for (i = 0; i < nr_map; i++) {
1452 __be16 bdf_be = cpu_to_be16(map[i].bdf);
1456 hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be),
1459 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1461 /* If the register is already populated, look for next available entry */
1463 u8 current_hash = hash++;
1464 u8 next_mask = 0xff;
1466 /* If NEXT field is NULL then update it with next hash */
1467 if (!(val & next_mask)) {
1469 writel(val, bdf_to_sid_base + current_hash * sizeof(u32));
1472 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1475 /* BDF [31:16] | SID [15:8] | NEXT [7:0] */
1476 val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0;
1477 writel(val, bdf_to_sid_base + hash * sizeof(u32));
1485 static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
1487 struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
1488 struct qcom_pcie *pcie = to_qcom_pcie(pci);
1491 qcom_ep_reset_assert(pcie);
1493 ret = pcie->cfg->ops->init(pcie);
1497 ret = phy_power_on(pcie->phy);
1501 if (pcie->cfg->ops->post_init) {
1502 ret = pcie->cfg->ops->post_init(pcie);
1504 goto err_disable_phy;
1507 qcom_ep_reset_deassert(pcie);
1509 if (pcie->cfg->ops->config_sid) {
1510 ret = pcie->cfg->ops->config_sid(pcie);
1518 qcom_ep_reset_assert(pcie);
1519 if (pcie->cfg->ops->post_deinit)
1520 pcie->cfg->ops->post_deinit(pcie);
1522 phy_power_off(pcie->phy);
1524 pcie->cfg->ops->deinit(pcie);
1529 static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
1530 .host_init = qcom_pcie_host_init,
1533 /* Qcom IP rev.: 2.1.0 Synopsys IP rev.: 4.01a */
1534 static const struct qcom_pcie_ops ops_2_1_0 = {
1535 .get_resources = qcom_pcie_get_resources_2_1_0,
1536 .init = qcom_pcie_init_2_1_0,
1537 .post_init = qcom_pcie_post_init_2_1_0,
1538 .deinit = qcom_pcie_deinit_2_1_0,
1539 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1542 /* Qcom IP rev.: 1.0.0 Synopsys IP rev.: 4.11a */
1543 static const struct qcom_pcie_ops ops_1_0_0 = {
1544 .get_resources = qcom_pcie_get_resources_1_0_0,
1545 .init = qcom_pcie_init_1_0_0,
1546 .post_init = qcom_pcie_post_init_1_0_0,
1547 .deinit = qcom_pcie_deinit_1_0_0,
1548 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1551 /* Qcom IP rev.: 2.3.2 Synopsys IP rev.: 4.21a */
1552 static const struct qcom_pcie_ops ops_2_3_2 = {
1553 .get_resources = qcom_pcie_get_resources_2_3_2,
1554 .init = qcom_pcie_init_2_3_2,
1555 .post_init = qcom_pcie_post_init_2_3_2,
1556 .deinit = qcom_pcie_deinit_2_3_2,
1557 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1560 /* Qcom IP rev.: 2.4.0 Synopsys IP rev.: 4.20a */
1561 static const struct qcom_pcie_ops ops_2_4_0 = {
1562 .get_resources = qcom_pcie_get_resources_2_4_0,
1563 .init = qcom_pcie_init_2_4_0,
1564 .post_init = qcom_pcie_post_init_2_4_0,
1565 .deinit = qcom_pcie_deinit_2_4_0,
1566 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1569 /* Qcom IP rev.: 2.3.3 Synopsys IP rev.: 4.30a */
1570 static const struct qcom_pcie_ops ops_2_3_3 = {
1571 .get_resources = qcom_pcie_get_resources_2_3_3,
1572 .init = qcom_pcie_init_2_3_3,
1573 .post_init = qcom_pcie_post_init_2_3_3,
1574 .deinit = qcom_pcie_deinit_2_3_3,
1575 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1578 /* Qcom IP rev.: 2.7.0 Synopsys IP rev.: 4.30a */
1579 static const struct qcom_pcie_ops ops_2_7_0 = {
1580 .get_resources = qcom_pcie_get_resources_2_7_0,
1581 .init = qcom_pcie_init_2_7_0,
1582 .deinit = qcom_pcie_deinit_2_7_0,
1583 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1586 /* Qcom IP rev.: 1.9.0 */
1587 static const struct qcom_pcie_ops ops_1_9_0 = {
1588 .get_resources = qcom_pcie_get_resources_2_7_0,
1589 .init = qcom_pcie_init_2_7_0,
1590 .deinit = qcom_pcie_deinit_2_7_0,
1591 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1592 .config_sid = qcom_pcie_config_sid_sm8250,
1595 /* Qcom IP rev.: 2.9.0 Synopsys IP rev.: 5.00a */
1596 static const struct qcom_pcie_ops ops_2_9_0 = {
1597 .get_resources = qcom_pcie_get_resources_2_9_0,
1598 .init = qcom_pcie_init_2_9_0,
1599 .post_init = qcom_pcie_post_init_2_9_0,
1600 .deinit = qcom_pcie_deinit_2_9_0,
1601 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1604 static const struct qcom_pcie_cfg apq8084_cfg = {
1608 static const struct qcom_pcie_cfg ipq8064_cfg = {
1612 static const struct qcom_pcie_cfg msm8996_cfg = {
1616 static const struct qcom_pcie_cfg ipq8074_cfg = {
1620 static const struct qcom_pcie_cfg ipq4019_cfg = {
1624 static const struct qcom_pcie_cfg sdm845_cfg = {
1626 .has_tbu_clk = true,
1629 static const struct qcom_pcie_cfg sm8150_cfg = {
1630 /* sm8150 has qcom IP rev 1.5.0. However 1.5.0 ops are same as
1631 * 1.9.0, so reuse the same.
1636 static const struct qcom_pcie_cfg sm8250_cfg = {
1638 .has_tbu_clk = true,
1639 .has_ddrss_sf_tbu_clk = true,
1642 static const struct qcom_pcie_cfg sm8450_pcie0_cfg = {
1644 .has_ddrss_sf_tbu_clk = true,
1645 .has_aggre0_clk = true,
1646 .has_aggre1_clk = true,
1649 static const struct qcom_pcie_cfg sm8450_pcie1_cfg = {
1651 .has_ddrss_sf_tbu_clk = true,
1652 .has_aggre1_clk = true,
1655 static const struct qcom_pcie_cfg sc7280_cfg = {
1657 .has_tbu_clk = true,
1660 static const struct qcom_pcie_cfg sc8180x_cfg = {
1662 .has_tbu_clk = true,
1665 static const struct qcom_pcie_cfg ipq6018_cfg = {
1669 static const struct dw_pcie_ops dw_pcie_ops = {
1670 .link_up = qcom_pcie_link_up,
1671 .start_link = qcom_pcie_start_link,
1674 static int qcom_pcie_probe(struct platform_device *pdev)
1676 struct device *dev = &pdev->dev;
1677 struct dw_pcie_rp *pp;
1678 struct dw_pcie *pci;
1679 struct qcom_pcie *pcie;
1680 const struct qcom_pcie_cfg *pcie_cfg;
1683 pcie_cfg = of_device_get_match_data(dev);
1684 if (!pcie_cfg || !pcie_cfg->ops) {
1685 dev_err(dev, "Invalid platform data\n");
1689 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
1693 pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
1697 pm_runtime_enable(dev);
1698 ret = pm_runtime_get_sync(dev);
1700 goto err_pm_runtime_put;
1703 pci->ops = &dw_pcie_ops;
1708 pcie->cfg = pcie_cfg;
1710 pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH);
1711 if (IS_ERR(pcie->reset)) {
1712 ret = PTR_ERR(pcie->reset);
1713 goto err_pm_runtime_put;
1716 pcie->parf = devm_platform_ioremap_resource_byname(pdev, "parf");
1717 if (IS_ERR(pcie->parf)) {
1718 ret = PTR_ERR(pcie->parf);
1719 goto err_pm_runtime_put;
1722 pcie->elbi = devm_platform_ioremap_resource_byname(pdev, "elbi");
1723 if (IS_ERR(pcie->elbi)) {
1724 ret = PTR_ERR(pcie->elbi);
1725 goto err_pm_runtime_put;
1728 pcie->phy = devm_phy_optional_get(dev, "pciephy");
1729 if (IS_ERR(pcie->phy)) {
1730 ret = PTR_ERR(pcie->phy);
1731 goto err_pm_runtime_put;
1734 ret = pcie->cfg->ops->get_resources(pcie);
1736 goto err_pm_runtime_put;
1738 pp->ops = &qcom_pcie_dw_ops;
1740 ret = phy_init(pcie->phy);
1742 goto err_pm_runtime_put;
1744 platform_set_drvdata(pdev, pcie);
1746 ret = dw_pcie_host_init(pp);
1748 dev_err(dev, "cannot initialize host\n");
1755 phy_exit(pcie->phy);
1757 pm_runtime_put(dev);
1758 pm_runtime_disable(dev);
1763 static const struct of_device_id qcom_pcie_match[] = {
1764 { .compatible = "qcom,pcie-apq8084", .data = &apq8084_cfg },
1765 { .compatible = "qcom,pcie-ipq8064", .data = &ipq8064_cfg },
1766 { .compatible = "qcom,pcie-ipq8064-v2", .data = &ipq8064_cfg },
1767 { .compatible = "qcom,pcie-apq8064", .data = &ipq8064_cfg },
1768 { .compatible = "qcom,pcie-msm8996", .data = &msm8996_cfg },
1769 { .compatible = "qcom,pcie-ipq8074", .data = &ipq8074_cfg },
1770 { .compatible = "qcom,pcie-ipq4019", .data = &ipq4019_cfg },
1771 { .compatible = "qcom,pcie-qcs404", .data = &ipq4019_cfg },
1772 { .compatible = "qcom,pcie-sdm845", .data = &sdm845_cfg },
1773 { .compatible = "qcom,pcie-sm8150", .data = &sm8150_cfg },
1774 { .compatible = "qcom,pcie-sm8250", .data = &sm8250_cfg },
1775 { .compatible = "qcom,pcie-sc8180x", .data = &sc8180x_cfg },
1776 { .compatible = "qcom,pcie-sm8450-pcie0", .data = &sm8450_pcie0_cfg },
1777 { .compatible = "qcom,pcie-sm8450-pcie1", .data = &sm8450_pcie1_cfg },
1778 { .compatible = "qcom,pcie-sc7280", .data = &sc7280_cfg },
1779 { .compatible = "qcom,pcie-ipq6018", .data = &ipq6018_cfg },
1783 static void qcom_fixup_class(struct pci_dev *dev)
1785 dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL;
1787 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0101, qcom_fixup_class);
1788 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0104, qcom_fixup_class);
1789 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0106, qcom_fixup_class);
1790 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0107, qcom_fixup_class);
1791 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class);
1792 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class);
1793 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class);
1795 static struct platform_driver qcom_pcie_driver = {
1796 .probe = qcom_pcie_probe,
1798 .name = "qcom-pcie",
1799 .suppress_bind_attrs = true,
1800 .of_match_table = qcom_pcie_match,
1803 builtin_platform_driver(qcom_pcie_driver);