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/debugfs.h>
14 #include <linux/delay.h>
15 #include <linux/gpio/consumer.h>
16 #include <linux/interconnect.h>
17 #include <linux/interrupt.h>
19 #include <linux/iopoll.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
23 #include <linux/of_gpio.h>
24 #include <linux/pci.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/platform_device.h>
27 #include <linux/phy/pcie.h>
28 #include <linux/phy/phy.h>
29 #include <linux/regulator/consumer.h>
30 #include <linux/reset.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
34 #include "../../pci.h"
35 #include "pcie-designware.h"
38 #define PARF_SYS_CTRL 0x00
39 #define PARF_PM_CTRL 0x20
40 #define PARF_PCS_DEEMPH 0x34
41 #define PARF_PCS_SWING 0x38
42 #define PARF_PHY_CTRL 0x40
43 #define PARF_PHY_REFCLK 0x4c
44 #define PARF_CONFIG_BITS 0x50
45 #define PARF_DBI_BASE_ADDR 0x168
46 #define PARF_MHI_CLOCK_RESET_CTRL 0x174
47 #define PARF_AXI_MSTR_WR_ADDR_HALT 0x178
48 #define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1a8
49 #define PARF_Q2A_FLUSH 0x1ac
50 #define PARF_LTSSM 0x1b0
51 #define PARF_SID_OFFSET 0x234
52 #define PARF_BDF_TRANSLATE_CFG 0x24c
53 #define PARF_SLV_ADDR_SPACE_SIZE 0x358
54 #define PARF_DEVICE_TYPE 0x1000
55 #define PARF_BDF_TO_SID_TABLE_N 0x2000
58 #define ELBI_SYS_CTRL 0x04
61 #define AXI_MSTR_RESP_COMP_CTRL0 0x818
62 #define AXI_MSTR_RESP_COMP_CTRL1 0x81c
65 #define PARF_DEBUG_CNT_PM_LINKST_IN_L2 0xc04
66 #define PARF_DEBUG_CNT_PM_LINKST_IN_L1 0xc0c
67 #define PARF_DEBUG_CNT_PM_LINKST_IN_L0S 0xc10
68 #define PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L1 0xc84
69 #define PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L2 0xc88
71 /* PARF_SYS_CTRL register fields */
72 #define MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN BIT(29)
73 #define MST_WAKEUP_EN BIT(13)
74 #define SLV_WAKEUP_EN BIT(12)
75 #define MSTR_ACLK_CGC_DIS BIT(10)
76 #define SLV_ACLK_CGC_DIS BIT(9)
77 #define CORE_CLK_CGC_DIS BIT(6)
78 #define AUX_PWR_DET BIT(4)
79 #define L23_CLK_RMV_DIS BIT(2)
80 #define L1_CLK_RMV_DIS BIT(1)
82 /* PARF_PM_CTRL register fields */
83 #define REQ_NOT_ENTR_L1 BIT(5)
85 /* PARF_PCS_DEEMPH register fields */
86 #define PCS_DEEMPH_TX_DEEMPH_GEN1(x) FIELD_PREP(GENMASK(21, 16), x)
87 #define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x) FIELD_PREP(GENMASK(13, 8), x)
88 #define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x) FIELD_PREP(GENMASK(5, 0), x)
90 /* PARF_PCS_SWING register fields */
91 #define PCS_SWING_TX_SWING_FULL(x) FIELD_PREP(GENMASK(14, 8), x)
92 #define PCS_SWING_TX_SWING_LOW(x) FIELD_PREP(GENMASK(6, 0), x)
94 /* PARF_PHY_CTRL register fields */
95 #define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK GENMASK(20, 16)
96 #define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) FIELD_PREP(PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK, x)
97 #define PHY_TEST_PWR_DOWN BIT(0)
99 /* PARF_PHY_REFCLK register fields */
100 #define PHY_REFCLK_SSP_EN BIT(16)
101 #define PHY_REFCLK_USE_PAD BIT(12)
103 /* PARF_CONFIG_BITS register fields */
104 #define PHY_RX0_EQ(x) FIELD_PREP(GENMASK(26, 24), x)
106 /* PARF_SLV_ADDR_SPACE_SIZE register value */
107 #define SLV_ADDR_SPACE_SZ 0x10000000
109 /* PARF_MHI_CLOCK_RESET_CTRL register fields */
110 #define AHB_CLK_EN BIT(0)
111 #define MSTR_AXI_CLK_EN BIT(1)
112 #define BYPASS BIT(4)
114 /* PARF_AXI_MSTR_WR_ADDR_HALT register fields */
117 /* PARF_LTSSM register fields */
118 #define LTSSM_EN BIT(8)
120 /* PARF_DEVICE_TYPE register fields */
121 #define DEVICE_TYPE_RC 0x4
123 /* ELBI_SYS_CTRL register fields */
124 #define ELBI_SYS_CTRL_LT_ENABLE BIT(0)
126 /* AXI_MSTR_RESP_COMP_CTRL0 register fields */
127 #define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K 0x4
128 #define CFG_REMOTE_RD_REQ_BRIDGE_SIZE_4K 0x5
130 /* AXI_MSTR_RESP_COMP_CTRL1 register fields */
131 #define CFG_BRIDGE_SB_INIT BIT(0)
133 /* PCI_EXP_SLTCAP register fields */
134 #define PCIE_CAP_SLOT_POWER_LIMIT_VAL FIELD_PREP(PCI_EXP_SLTCAP_SPLV, 250)
135 #define PCIE_CAP_SLOT_POWER_LIMIT_SCALE FIELD_PREP(PCI_EXP_SLTCAP_SPLS, 1)
136 #define PCIE_CAP_SLOT_VAL (PCI_EXP_SLTCAP_ABP | \
137 PCI_EXP_SLTCAP_PCP | \
138 PCI_EXP_SLTCAP_MRLSP | \
139 PCI_EXP_SLTCAP_AIP | \
140 PCI_EXP_SLTCAP_PIP | \
141 PCI_EXP_SLTCAP_HPS | \
142 PCI_EXP_SLTCAP_EIP | \
143 PCIE_CAP_SLOT_POWER_LIMIT_VAL | \
144 PCIE_CAP_SLOT_POWER_LIMIT_SCALE)
146 #define PERST_DELAY_US 1000
148 #define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0))
150 #define QCOM_PCIE_LINK_SPEED_TO_BW(speed) \
151 Mbps_to_icc(PCIE_SPEED2MBS_ENC(pcie_link_speed[speed]))
153 #define QCOM_PCIE_1_0_0_MAX_CLOCKS 4
154 struct qcom_pcie_resources_1_0_0 {
155 struct clk_bulk_data clks[QCOM_PCIE_1_0_0_MAX_CLOCKS];
156 struct reset_control *core;
157 struct regulator *vdda;
160 #define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
161 #define QCOM_PCIE_2_1_0_MAX_RESETS 6
162 #define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
163 struct qcom_pcie_resources_2_1_0 {
164 struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
165 struct reset_control_bulk_data resets[QCOM_PCIE_2_1_0_MAX_RESETS];
167 struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
170 #define QCOM_PCIE_2_3_2_MAX_CLOCKS 4
171 #define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
172 struct qcom_pcie_resources_2_3_2 {
173 struct clk_bulk_data clks[QCOM_PCIE_2_3_2_MAX_CLOCKS];
174 struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
177 #define QCOM_PCIE_2_3_3_MAX_CLOCKS 5
178 #define QCOM_PCIE_2_3_3_MAX_RESETS 7
179 struct qcom_pcie_resources_2_3_3 {
180 struct clk_bulk_data clks[QCOM_PCIE_2_3_3_MAX_CLOCKS];
181 struct reset_control_bulk_data rst[QCOM_PCIE_2_3_3_MAX_RESETS];
184 #define QCOM_PCIE_2_4_0_MAX_CLOCKS 4
185 #define QCOM_PCIE_2_4_0_MAX_RESETS 12
186 struct qcom_pcie_resources_2_4_0 {
187 struct clk_bulk_data clks[QCOM_PCIE_2_4_0_MAX_CLOCKS];
189 struct reset_control_bulk_data resets[QCOM_PCIE_2_4_0_MAX_RESETS];
193 #define QCOM_PCIE_2_7_0_MAX_CLOCKS 15
194 #define QCOM_PCIE_2_7_0_MAX_SUPPLIES 2
195 struct qcom_pcie_resources_2_7_0 {
196 struct clk_bulk_data clks[QCOM_PCIE_2_7_0_MAX_CLOCKS];
198 struct regulator_bulk_data supplies[QCOM_PCIE_2_7_0_MAX_SUPPLIES];
199 struct reset_control *rst;
202 #define QCOM_PCIE_2_9_0_MAX_CLOCKS 5
203 struct qcom_pcie_resources_2_9_0 {
204 struct clk_bulk_data clks[QCOM_PCIE_2_9_0_MAX_CLOCKS];
205 struct reset_control *rst;
208 union qcom_pcie_resources {
209 struct qcom_pcie_resources_1_0_0 v1_0_0;
210 struct qcom_pcie_resources_2_1_0 v2_1_0;
211 struct qcom_pcie_resources_2_3_2 v2_3_2;
212 struct qcom_pcie_resources_2_3_3 v2_3_3;
213 struct qcom_pcie_resources_2_4_0 v2_4_0;
214 struct qcom_pcie_resources_2_7_0 v2_7_0;
215 struct qcom_pcie_resources_2_9_0 v2_9_0;
220 struct qcom_pcie_ops {
221 int (*get_resources)(struct qcom_pcie *pcie);
222 int (*init)(struct qcom_pcie *pcie);
223 int (*post_init)(struct qcom_pcie *pcie);
224 void (*host_post_init)(struct qcom_pcie *pcie);
225 void (*deinit)(struct qcom_pcie *pcie);
226 void (*ltssm_enable)(struct qcom_pcie *pcie);
227 int (*config_sid)(struct qcom_pcie *pcie);
230 struct qcom_pcie_cfg {
231 const struct qcom_pcie_ops *ops;
236 void __iomem *parf; /* DT parf */
237 void __iomem *elbi; /* DT elbi */
239 union qcom_pcie_resources res;
241 struct gpio_desc *reset;
242 struct icc_path *icc_mem;
243 const struct qcom_pcie_cfg *cfg;
244 struct dentry *debugfs;
248 #define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
250 static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
252 gpiod_set_value_cansleep(pcie->reset, 1);
253 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
256 static void qcom_ep_reset_deassert(struct qcom_pcie *pcie)
258 /* Ensure that PERST has been asserted for at least 100 ms */
260 gpiod_set_value_cansleep(pcie->reset, 0);
261 usleep_range(PERST_DELAY_US, PERST_DELAY_US + 500);
264 static int qcom_pcie_start_link(struct dw_pcie *pci)
266 struct qcom_pcie *pcie = to_qcom_pcie(pci);
268 /* Enable Link Training state machine */
269 if (pcie->cfg->ops->ltssm_enable)
270 pcie->cfg->ops->ltssm_enable(pcie);
275 static void qcom_pcie_clear_hpc(struct dw_pcie *pci)
277 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
280 dw_pcie_dbi_ro_wr_en(pci);
282 val = readl(pci->dbi_base + offset + PCI_EXP_SLTCAP);
283 val &= ~PCI_EXP_SLTCAP_HPC;
284 writel(val, pci->dbi_base + offset + PCI_EXP_SLTCAP);
286 dw_pcie_dbi_ro_wr_dis(pci);
289 static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie)
293 /* enable link training */
294 val = readl(pcie->elbi + ELBI_SYS_CTRL);
295 val |= ELBI_SYS_CTRL_LT_ENABLE;
296 writel(val, pcie->elbi + ELBI_SYS_CTRL);
299 static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
301 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
302 struct dw_pcie *pci = pcie->pci;
303 struct device *dev = pci->dev;
304 bool is_apq = of_device_is_compatible(dev->of_node, "qcom,pcie-apq8064");
307 res->supplies[0].supply = "vdda";
308 res->supplies[1].supply = "vdda_phy";
309 res->supplies[2].supply = "vdda_refclk";
310 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
315 res->clks[0].id = "iface";
316 res->clks[1].id = "core";
317 res->clks[2].id = "phy";
318 res->clks[3].id = "aux";
319 res->clks[4].id = "ref";
321 /* iface, core, phy are required */
322 ret = devm_clk_bulk_get(dev, 3, res->clks);
326 /* aux, ref are optional */
327 ret = devm_clk_bulk_get_optional(dev, 2, res->clks + 3);
331 res->resets[0].id = "pci";
332 res->resets[1].id = "axi";
333 res->resets[2].id = "ahb";
334 res->resets[3].id = "por";
335 res->resets[4].id = "phy";
336 res->resets[5].id = "ext";
338 /* ext is optional on APQ8016 */
339 res->num_resets = is_apq ? 5 : 6;
340 ret = devm_reset_control_bulk_get_exclusive(dev, res->num_resets, res->resets);
347 static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie)
349 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
351 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
352 reset_control_bulk_assert(res->num_resets, res->resets);
354 writel(1, pcie->parf + PARF_PHY_CTRL);
356 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
359 static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
361 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
362 struct dw_pcie *pci = pcie->pci;
363 struct device *dev = pci->dev;
366 /* reset the PCIe interface as uboot can leave it undefined state */
367 ret = reset_control_bulk_assert(res->num_resets, res->resets);
369 dev_err(dev, "cannot assert resets\n");
373 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
375 dev_err(dev, "cannot enable regulators\n");
379 ret = reset_control_bulk_deassert(res->num_resets, res->resets);
381 dev_err(dev, "cannot deassert resets\n");
382 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
389 static int qcom_pcie_post_init_2_1_0(struct qcom_pcie *pcie)
391 struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
392 struct dw_pcie *pci = pcie->pci;
393 struct device *dev = pci->dev;
394 struct device_node *node = dev->of_node;
398 /* enable PCIe clocks and resets */
399 val = readl(pcie->parf + PARF_PHY_CTRL);
400 val &= ~PHY_TEST_PWR_DOWN;
401 writel(val, pcie->parf + PARF_PHY_CTRL);
403 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
407 if (of_device_is_compatible(node, "qcom,pcie-ipq8064") ||
408 of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) {
409 writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
410 PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
411 PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
412 pcie->parf + PARF_PCS_DEEMPH);
413 writel(PCS_SWING_TX_SWING_FULL(120) |
414 PCS_SWING_TX_SWING_LOW(120),
415 pcie->parf + PARF_PCS_SWING);
416 writel(PHY_RX0_EQ(4), pcie->parf + PARF_CONFIG_BITS);
419 if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
420 /* set TX termination offset */
421 val = readl(pcie->parf + PARF_PHY_CTRL);
422 val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
423 val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
424 writel(val, pcie->parf + PARF_PHY_CTRL);
427 /* enable external reference clock */
428 val = readl(pcie->parf + PARF_PHY_REFCLK);
429 /* USE_PAD is required only for ipq806x */
430 if (!of_device_is_compatible(node, "qcom,pcie-apq8064"))
431 val &= ~PHY_REFCLK_USE_PAD;
432 val |= PHY_REFCLK_SSP_EN;
433 writel(val, pcie->parf + PARF_PHY_REFCLK);
435 /* wait for clock acquisition */
436 usleep_range(1000, 1500);
438 /* Set the Max TLP size to 2K, instead of using default of 4K */
439 writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
440 pci->dbi_base + AXI_MSTR_RESP_COMP_CTRL0);
441 writel(CFG_BRIDGE_SB_INIT,
442 pci->dbi_base + AXI_MSTR_RESP_COMP_CTRL1);
444 qcom_pcie_clear_hpc(pcie->pci);
449 static int qcom_pcie_get_resources_1_0_0(struct qcom_pcie *pcie)
451 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
452 struct dw_pcie *pci = pcie->pci;
453 struct device *dev = pci->dev;
456 res->vdda = devm_regulator_get(dev, "vdda");
457 if (IS_ERR(res->vdda))
458 return PTR_ERR(res->vdda);
460 res->clks[0].id = "iface";
461 res->clks[1].id = "aux";
462 res->clks[2].id = "master_bus";
463 res->clks[3].id = "slave_bus";
465 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
469 res->core = devm_reset_control_get_exclusive(dev, "core");
470 return PTR_ERR_OR_ZERO(res->core);
473 static void qcom_pcie_deinit_1_0_0(struct qcom_pcie *pcie)
475 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
477 reset_control_assert(res->core);
478 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
479 regulator_disable(res->vdda);
482 static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie)
484 struct qcom_pcie_resources_1_0_0 *res = &pcie->res.v1_0_0;
485 struct dw_pcie *pci = pcie->pci;
486 struct device *dev = pci->dev;
489 ret = reset_control_deassert(res->core);
491 dev_err(dev, "cannot deassert core reset\n");
495 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
497 dev_err(dev, "cannot prepare/enable clocks\n");
498 goto err_assert_reset;
501 ret = regulator_enable(res->vdda);
503 dev_err(dev, "cannot enable vdda regulator\n");
504 goto err_disable_clks;
510 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
512 reset_control_assert(res->core);
517 static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie)
519 /* change DBI base address */
520 writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
522 if (IS_ENABLED(CONFIG_PCI_MSI)) {
523 u32 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
526 writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT);
529 qcom_pcie_clear_hpc(pcie->pci);
534 static void qcom_pcie_2_3_2_ltssm_enable(struct qcom_pcie *pcie)
538 /* enable link training */
539 val = readl(pcie->parf + PARF_LTSSM);
541 writel(val, pcie->parf + PARF_LTSSM);
544 static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
546 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
547 struct dw_pcie *pci = pcie->pci;
548 struct device *dev = pci->dev;
551 res->supplies[0].supply = "vdda";
552 res->supplies[1].supply = "vddpe-3v3";
553 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
558 res->clks[0].id = "aux";
559 res->clks[1].id = "cfg";
560 res->clks[2].id = "bus_master";
561 res->clks[3].id = "bus_slave";
563 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
570 static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
572 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
574 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
575 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
578 static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
580 struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;
581 struct dw_pcie *pci = pcie->pci;
582 struct device *dev = pci->dev;
585 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
587 dev_err(dev, "cannot enable regulators\n");
591 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
593 dev_err(dev, "cannot prepare/enable clocks\n");
594 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
601 static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
605 /* enable PCIe clocks and resets */
606 val = readl(pcie->parf + PARF_PHY_CTRL);
607 val &= ~PHY_TEST_PWR_DOWN;
608 writel(val, pcie->parf + PARF_PHY_CTRL);
610 /* change DBI base address */
611 writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
613 /* MAC PHY_POWERDOWN MUX DISABLE */
614 val = readl(pcie->parf + PARF_SYS_CTRL);
615 val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN;
616 writel(val, pcie->parf + PARF_SYS_CTRL);
618 val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
620 writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
622 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
624 writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
626 qcom_pcie_clear_hpc(pcie->pci);
631 static int qcom_pcie_get_resources_2_4_0(struct qcom_pcie *pcie)
633 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
634 struct dw_pcie *pci = pcie->pci;
635 struct device *dev = pci->dev;
636 bool is_ipq = of_device_is_compatible(dev->of_node, "qcom,pcie-ipq4019");
639 res->clks[0].id = "aux";
640 res->clks[1].id = "master_bus";
641 res->clks[2].id = "slave_bus";
642 res->clks[3].id = "iface";
644 /* qcom,pcie-ipq4019 is defined without "iface" */
645 res->num_clks = is_ipq ? 3 : 4;
647 ret = devm_clk_bulk_get(dev, res->num_clks, res->clks);
651 res->resets[0].id = "axi_m";
652 res->resets[1].id = "axi_s";
653 res->resets[2].id = "axi_m_sticky";
654 res->resets[3].id = "pipe_sticky";
655 res->resets[4].id = "pwr";
656 res->resets[5].id = "ahb";
657 res->resets[6].id = "pipe";
658 res->resets[7].id = "axi_m_vmid";
659 res->resets[8].id = "axi_s_xpu";
660 res->resets[9].id = "parf";
661 res->resets[10].id = "phy";
662 res->resets[11].id = "phy_ahb";
664 res->num_resets = is_ipq ? 12 : 6;
666 ret = devm_reset_control_bulk_get_exclusive(dev, res->num_resets, res->resets);
673 static void qcom_pcie_deinit_2_4_0(struct qcom_pcie *pcie)
675 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
677 reset_control_bulk_assert(res->num_resets, res->resets);
678 clk_bulk_disable_unprepare(res->num_clks, res->clks);
681 static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie)
683 struct qcom_pcie_resources_2_4_0 *res = &pcie->res.v2_4_0;
684 struct dw_pcie *pci = pcie->pci;
685 struct device *dev = pci->dev;
688 ret = reset_control_bulk_assert(res->num_resets, res->resets);
690 dev_err(dev, "cannot assert resets\n");
694 usleep_range(10000, 12000);
696 ret = reset_control_bulk_deassert(res->num_resets, res->resets);
698 dev_err(dev, "cannot deassert resets\n");
702 usleep_range(10000, 12000);
704 ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
706 reset_control_bulk_assert(res->num_resets, res->resets);
713 static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
715 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
716 struct dw_pcie *pci = pcie->pci;
717 struct device *dev = pci->dev;
720 res->clks[0].id = "iface";
721 res->clks[1].id = "axi_m";
722 res->clks[2].id = "axi_s";
723 res->clks[3].id = "ahb";
724 res->clks[4].id = "aux";
726 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
730 res->rst[0].id = "axi_m";
731 res->rst[1].id = "axi_s";
732 res->rst[2].id = "pipe";
733 res->rst[3].id = "axi_m_sticky";
734 res->rst[4].id = "sticky";
735 res->rst[5].id = "ahb";
736 res->rst[6].id = "sleep";
738 ret = devm_reset_control_bulk_get_exclusive(dev, ARRAY_SIZE(res->rst), res->rst);
745 static void qcom_pcie_deinit_2_3_3(struct qcom_pcie *pcie)
747 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
749 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
752 static int qcom_pcie_init_2_3_3(struct qcom_pcie *pcie)
754 struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
755 struct dw_pcie *pci = pcie->pci;
756 struct device *dev = pci->dev;
759 ret = reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst);
761 dev_err(dev, "cannot assert resets\n");
765 usleep_range(2000, 2500);
767 ret = reset_control_bulk_deassert(ARRAY_SIZE(res->rst), res->rst);
769 dev_err(dev, "cannot deassert resets\n");
774 * Don't have a way to see if the reset has completed.
775 * Wait for some time.
777 usleep_range(2000, 2500);
779 ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
781 dev_err(dev, "cannot prepare/enable clocks\n");
782 goto err_assert_resets;
789 * Not checking for failure, will anyway return
790 * the original failure in 'ret'.
792 reset_control_bulk_assert(ARRAY_SIZE(res->rst), res->rst);
797 static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie)
799 struct dw_pcie *pci = pcie->pci;
800 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
803 writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
805 val = readl(pcie->parf + PARF_PHY_CTRL);
806 val &= ~PHY_TEST_PWR_DOWN;
807 writel(val, pcie->parf + PARF_PHY_CTRL);
809 writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
811 writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS
812 | SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
813 AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
814 pcie->parf + PARF_SYS_CTRL);
815 writel(0, pcie->parf + PARF_Q2A_FLUSH);
817 writel(PCI_COMMAND_MASTER, pci->dbi_base + PCI_COMMAND);
819 dw_pcie_dbi_ro_wr_en(pci);
821 writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
823 val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
824 val &= ~PCI_EXP_LNKCAP_ASPMS;
825 writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP);
827 writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset +
830 dw_pcie_dbi_ro_wr_dis(pci);
835 static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
837 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
838 struct dw_pcie *pci = pcie->pci;
839 struct device *dev = pci->dev;
840 unsigned int num_clks, num_opt_clks;
844 res->rst = devm_reset_control_array_get_exclusive(dev);
845 if (IS_ERR(res->rst))
846 return PTR_ERR(res->rst);
848 res->supplies[0].supply = "vdda";
849 res->supplies[1].supply = "vddpe-3v3";
850 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies),
856 res->clks[idx++].id = "aux";
857 res->clks[idx++].id = "cfg";
858 res->clks[idx++].id = "bus_master";
859 res->clks[idx++].id = "bus_slave";
860 res->clks[idx++].id = "slave_q2a";
864 ret = devm_clk_bulk_get(dev, num_clks, res->clks);
868 res->clks[idx++].id = "tbu";
869 res->clks[idx++].id = "ddrss_sf_tbu";
870 res->clks[idx++].id = "aggre0";
871 res->clks[idx++].id = "aggre1";
872 res->clks[idx++].id = "noc_aggr";
873 res->clks[idx++].id = "noc_aggr_4";
874 res->clks[idx++].id = "noc_aggr_south_sf";
875 res->clks[idx++].id = "cnoc_qx";
876 res->clks[idx++].id = "sleep";
877 res->clks[idx++].id = "cnoc_sf_axi";
879 num_opt_clks = idx - num_clks;
882 ret = devm_clk_bulk_get_optional(dev, num_opt_clks, res->clks + num_clks);
889 static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
891 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
892 struct dw_pcie *pci = pcie->pci;
893 struct device *dev = pci->dev;
897 ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
899 dev_err(dev, "cannot enable regulators\n");
903 ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
905 goto err_disable_regulators;
907 ret = reset_control_assert(res->rst);
909 dev_err(dev, "reset assert failed (%d)\n", ret);
910 goto err_disable_clocks;
913 usleep_range(1000, 1500);
915 ret = reset_control_deassert(res->rst);
917 dev_err(dev, "reset deassert failed (%d)\n", ret);
918 goto err_disable_clocks;
921 /* Wait for reset to complete, required on SM8450 */
922 usleep_range(1000, 1500);
924 /* configure PCIe to RC mode */
925 writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE);
927 /* enable PCIe clocks and resets */
928 val = readl(pcie->parf + PARF_PHY_CTRL);
929 val &= ~PHY_TEST_PWR_DOWN;
930 writel(val, pcie->parf + PARF_PHY_CTRL);
932 /* change DBI base address */
933 writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
935 /* MAC PHY_POWERDOWN MUX DISABLE */
936 val = readl(pcie->parf + PARF_SYS_CTRL);
937 val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN;
938 writel(val, pcie->parf + PARF_SYS_CTRL);
940 val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
942 writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
944 /* Enable L1 and L1SS */
945 val = readl(pcie->parf + PARF_PM_CTRL);
946 val &= ~REQ_NOT_ENTR_L1;
947 writel(val, pcie->parf + PARF_PM_CTRL);
949 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
951 writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
955 clk_bulk_disable_unprepare(res->num_clks, res->clks);
956 err_disable_regulators:
957 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
962 static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie)
964 qcom_pcie_clear_hpc(pcie->pci);
969 static int qcom_pcie_enable_aspm(struct pci_dev *pdev, void *userdata)
972 * Downstream devices need to be in D0 state before enabling PCI PM
975 pci_set_power_state_locked(pdev, PCI_D0);
976 pci_enable_link_state_locked(pdev, PCIE_LINK_STATE_ALL);
981 static void qcom_pcie_host_post_init_2_7_0(struct qcom_pcie *pcie)
983 struct dw_pcie_rp *pp = &pcie->pci->pp;
985 pci_walk_bus(pp->bridge->bus, qcom_pcie_enable_aspm, NULL);
988 static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
990 struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
992 clk_bulk_disable_unprepare(res->num_clks, res->clks);
994 regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
997 static int qcom_pcie_config_sid_1_9_0(struct qcom_pcie *pcie)
999 /* iommu map structure */
1006 void __iomem *bdf_to_sid_base = pcie->parf + PARF_BDF_TO_SID_TABLE_N;
1007 struct device *dev = pcie->pci->dev;
1008 u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE];
1009 int i, nr_map, size = 0;
1012 of_get_property(dev->of_node, "iommu-map", &size);
1016 map = kzalloc(size, GFP_KERNEL);
1020 of_property_read_u32_array(dev->of_node, "iommu-map", (u32 *)map,
1021 size / sizeof(u32));
1023 nr_map = size / (sizeof(*map));
1025 crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL);
1027 /* Registers need to be zero out first */
1028 memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32));
1030 /* Extract the SMMU SID base from the first entry of iommu-map */
1031 smmu_sid_base = map[0].smmu_sid;
1033 /* Look for an available entry to hold the mapping */
1034 for (i = 0; i < nr_map; i++) {
1035 __be16 bdf_be = cpu_to_be16(map[i].bdf);
1039 hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be), 0);
1041 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1043 /* If the register is already populated, look for next available entry */
1045 u8 current_hash = hash++;
1046 u8 next_mask = 0xff;
1048 /* If NEXT field is NULL then update it with next hash */
1049 if (!(val & next_mask)) {
1051 writel(val, bdf_to_sid_base + current_hash * sizeof(u32));
1054 val = readl(bdf_to_sid_base + hash * sizeof(u32));
1057 /* BDF [31:16] | SID [15:8] | NEXT [7:0] */
1058 val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0;
1059 writel(val, bdf_to_sid_base + hash * sizeof(u32));
1067 static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie)
1069 struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
1070 struct dw_pcie *pci = pcie->pci;
1071 struct device *dev = pci->dev;
1074 res->clks[0].id = "iface";
1075 res->clks[1].id = "axi_m";
1076 res->clks[2].id = "axi_s";
1077 res->clks[3].id = "axi_bridge";
1078 res->clks[4].id = "rchng";
1080 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
1084 res->rst = devm_reset_control_array_get_exclusive(dev);
1085 if (IS_ERR(res->rst))
1086 return PTR_ERR(res->rst);
1091 static void qcom_pcie_deinit_2_9_0(struct qcom_pcie *pcie)
1093 struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
1095 clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
1098 static int qcom_pcie_init_2_9_0(struct qcom_pcie *pcie)
1100 struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
1101 struct device *dev = pcie->pci->dev;
1104 ret = reset_control_assert(res->rst);
1106 dev_err(dev, "reset assert failed (%d)\n", ret);
1111 * Delay periods before and after reset deassert are working values
1112 * from downstream Codeaurora kernel
1114 usleep_range(2000, 2500);
1116 ret = reset_control_deassert(res->rst);
1118 dev_err(dev, "reset deassert failed (%d)\n", ret);
1122 usleep_range(2000, 2500);
1124 return clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
1127 static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie)
1129 struct dw_pcie *pci = pcie->pci;
1130 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1134 writel(SLV_ADDR_SPACE_SZ,
1135 pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
1137 val = readl(pcie->parf + PARF_PHY_CTRL);
1138 val &= ~PHY_TEST_PWR_DOWN;
1139 writel(val, pcie->parf + PARF_PHY_CTRL);
1141 writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
1143 writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE);
1144 writel(BYPASS | MSTR_AXI_CLK_EN | AHB_CLK_EN,
1145 pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
1146 writel(GEN3_RELATED_OFF_RXEQ_RGRDLESS_RXTS |
1147 GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL,
1148 pci->dbi_base + GEN3_RELATED_OFF);
1150 writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS |
1151 SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS |
1152 AUX_PWR_DET | L23_CLK_RMV_DIS | L1_CLK_RMV_DIS,
1153 pcie->parf + PARF_SYS_CTRL);
1155 writel(0, pcie->parf + PARF_Q2A_FLUSH);
1157 dw_pcie_dbi_ro_wr_en(pci);
1159 writel(PCIE_CAP_SLOT_VAL, pci->dbi_base + offset + PCI_EXP_SLTCAP);
1161 val = readl(pci->dbi_base + offset + PCI_EXP_LNKCAP);
1162 val &= ~PCI_EXP_LNKCAP_ASPMS;
1163 writel(val, pci->dbi_base + offset + PCI_EXP_LNKCAP);
1165 writel(PCI_EXP_DEVCTL2_COMP_TMOUT_DIS, pci->dbi_base + offset +
1168 dw_pcie_dbi_ro_wr_dis(pci);
1170 for (i = 0; i < 256; i++)
1171 writel(0, pcie->parf + PARF_BDF_TO_SID_TABLE_N + (4 * i));
1176 static int qcom_pcie_link_up(struct dw_pcie *pci)
1178 u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1179 u16 val = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA);
1181 return !!(val & PCI_EXP_LNKSTA_DLLLA);
1184 static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
1186 struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
1187 struct qcom_pcie *pcie = to_qcom_pcie(pci);
1190 qcom_ep_reset_assert(pcie);
1192 ret = pcie->cfg->ops->init(pcie);
1196 ret = phy_set_mode_ext(pcie->phy, PHY_MODE_PCIE, PHY_MODE_PCIE_RC);
1200 ret = phy_power_on(pcie->phy);
1204 if (pcie->cfg->ops->post_init) {
1205 ret = pcie->cfg->ops->post_init(pcie);
1207 goto err_disable_phy;
1210 qcom_ep_reset_deassert(pcie);
1212 if (pcie->cfg->ops->config_sid) {
1213 ret = pcie->cfg->ops->config_sid(pcie);
1215 goto err_assert_reset;
1221 qcom_ep_reset_assert(pcie);
1223 phy_power_off(pcie->phy);
1225 pcie->cfg->ops->deinit(pcie);
1230 static void qcom_pcie_host_deinit(struct dw_pcie_rp *pp)
1232 struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
1233 struct qcom_pcie *pcie = to_qcom_pcie(pci);
1235 qcom_ep_reset_assert(pcie);
1236 phy_power_off(pcie->phy);
1237 pcie->cfg->ops->deinit(pcie);
1240 static void qcom_pcie_host_post_init(struct dw_pcie_rp *pp)
1242 struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
1243 struct qcom_pcie *pcie = to_qcom_pcie(pci);
1245 if (pcie->cfg->ops->host_post_init)
1246 pcie->cfg->ops->host_post_init(pcie);
1249 static const struct dw_pcie_host_ops qcom_pcie_dw_ops = {
1250 .host_init = qcom_pcie_host_init,
1251 .host_deinit = qcom_pcie_host_deinit,
1252 .host_post_init = qcom_pcie_host_post_init,
1255 /* Qcom IP rev.: 2.1.0 Synopsys IP rev.: 4.01a */
1256 static const struct qcom_pcie_ops ops_2_1_0 = {
1257 .get_resources = qcom_pcie_get_resources_2_1_0,
1258 .init = qcom_pcie_init_2_1_0,
1259 .post_init = qcom_pcie_post_init_2_1_0,
1260 .deinit = qcom_pcie_deinit_2_1_0,
1261 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1264 /* Qcom IP rev.: 1.0.0 Synopsys IP rev.: 4.11a */
1265 static const struct qcom_pcie_ops ops_1_0_0 = {
1266 .get_resources = qcom_pcie_get_resources_1_0_0,
1267 .init = qcom_pcie_init_1_0_0,
1268 .post_init = qcom_pcie_post_init_1_0_0,
1269 .deinit = qcom_pcie_deinit_1_0_0,
1270 .ltssm_enable = qcom_pcie_2_1_0_ltssm_enable,
1273 /* Qcom IP rev.: 2.3.2 Synopsys IP rev.: 4.21a */
1274 static const struct qcom_pcie_ops ops_2_3_2 = {
1275 .get_resources = qcom_pcie_get_resources_2_3_2,
1276 .init = qcom_pcie_init_2_3_2,
1277 .post_init = qcom_pcie_post_init_2_3_2,
1278 .deinit = qcom_pcie_deinit_2_3_2,
1279 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1282 /* Qcom IP rev.: 2.4.0 Synopsys IP rev.: 4.20a */
1283 static const struct qcom_pcie_ops ops_2_4_0 = {
1284 .get_resources = qcom_pcie_get_resources_2_4_0,
1285 .init = qcom_pcie_init_2_4_0,
1286 .post_init = qcom_pcie_post_init_2_3_2,
1287 .deinit = qcom_pcie_deinit_2_4_0,
1288 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1291 /* Qcom IP rev.: 2.3.3 Synopsys IP rev.: 4.30a */
1292 static const struct qcom_pcie_ops ops_2_3_3 = {
1293 .get_resources = qcom_pcie_get_resources_2_3_3,
1294 .init = qcom_pcie_init_2_3_3,
1295 .post_init = qcom_pcie_post_init_2_3_3,
1296 .deinit = qcom_pcie_deinit_2_3_3,
1297 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1300 /* Qcom IP rev.: 2.7.0 Synopsys IP rev.: 4.30a */
1301 static const struct qcom_pcie_ops ops_2_7_0 = {
1302 .get_resources = qcom_pcie_get_resources_2_7_0,
1303 .init = qcom_pcie_init_2_7_0,
1304 .post_init = qcom_pcie_post_init_2_7_0,
1305 .deinit = qcom_pcie_deinit_2_7_0,
1306 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1309 /* Qcom IP rev.: 1.9.0 */
1310 static const struct qcom_pcie_ops ops_1_9_0 = {
1311 .get_resources = qcom_pcie_get_resources_2_7_0,
1312 .init = qcom_pcie_init_2_7_0,
1313 .post_init = qcom_pcie_post_init_2_7_0,
1314 .host_post_init = qcom_pcie_host_post_init_2_7_0,
1315 .deinit = qcom_pcie_deinit_2_7_0,
1316 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1317 .config_sid = qcom_pcie_config_sid_1_9_0,
1320 /* Qcom IP rev.: 2.9.0 Synopsys IP rev.: 5.00a */
1321 static const struct qcom_pcie_ops ops_2_9_0 = {
1322 .get_resources = qcom_pcie_get_resources_2_9_0,
1323 .init = qcom_pcie_init_2_9_0,
1324 .post_init = qcom_pcie_post_init_2_9_0,
1325 .deinit = qcom_pcie_deinit_2_9_0,
1326 .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
1329 static const struct qcom_pcie_cfg cfg_1_0_0 = {
1333 static const struct qcom_pcie_cfg cfg_1_9_0 = {
1337 static const struct qcom_pcie_cfg cfg_2_1_0 = {
1341 static const struct qcom_pcie_cfg cfg_2_3_2 = {
1345 static const struct qcom_pcie_cfg cfg_2_3_3 = {
1349 static const struct qcom_pcie_cfg cfg_2_4_0 = {
1353 static const struct qcom_pcie_cfg cfg_2_7_0 = {
1357 static const struct qcom_pcie_cfg cfg_2_9_0 = {
1361 static const struct dw_pcie_ops dw_pcie_ops = {
1362 .link_up = qcom_pcie_link_up,
1363 .start_link = qcom_pcie_start_link,
1366 static int qcom_pcie_icc_init(struct qcom_pcie *pcie)
1368 struct dw_pcie *pci = pcie->pci;
1371 pcie->icc_mem = devm_of_icc_get(pci->dev, "pcie-mem");
1372 if (IS_ERR(pcie->icc_mem))
1373 return PTR_ERR(pcie->icc_mem);
1376 * Some Qualcomm platforms require interconnect bandwidth constraints
1377 * to be set before enabling interconnect clocks.
1379 * Set an initial peak bandwidth corresponding to single-lane Gen 1
1380 * for the pcie-mem path.
1382 ret = icc_set_bw(pcie->icc_mem, 0, QCOM_PCIE_LINK_SPEED_TO_BW(1));
1384 dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n",
1392 static void qcom_pcie_icc_update(struct qcom_pcie *pcie)
1394 struct dw_pcie *pci = pcie->pci;
1402 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
1403 status = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA);
1405 /* Only update constraints if link is up. */
1406 if (!(status & PCI_EXP_LNKSTA_DLLLA))
1409 speed = FIELD_GET(PCI_EXP_LNKSTA_CLS, status);
1410 width = FIELD_GET(PCI_EXP_LNKSTA_NLW, status);
1412 ret = icc_set_bw(pcie->icc_mem, 0, width * QCOM_PCIE_LINK_SPEED_TO_BW(speed));
1414 dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n",
1419 static int qcom_pcie_link_transition_count(struct seq_file *s, void *data)
1421 struct qcom_pcie *pcie = (struct qcom_pcie *)dev_get_drvdata(s->private);
1423 seq_printf(s, "L0s transition count: %u\n",
1424 readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L0S));
1426 seq_printf(s, "L1 transition count: %u\n",
1427 readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L1));
1429 seq_printf(s, "L1.1 transition count: %u\n",
1430 readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L1));
1432 seq_printf(s, "L1.2 transition count: %u\n",
1433 readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_AUX_CLK_IN_L1SUB_L2));
1435 seq_printf(s, "L2 transition count: %u\n",
1436 readl_relaxed(pcie->mhi + PARF_DEBUG_CNT_PM_LINKST_IN_L2));
1441 static void qcom_pcie_init_debugfs(struct qcom_pcie *pcie)
1443 struct dw_pcie *pci = pcie->pci;
1444 struct device *dev = pci->dev;
1447 name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node);
1451 pcie->debugfs = debugfs_create_dir(name, NULL);
1452 debugfs_create_devm_seqfile(dev, "link_transition_count", pcie->debugfs,
1453 qcom_pcie_link_transition_count);
1456 static int qcom_pcie_probe(struct platform_device *pdev)
1458 const struct qcom_pcie_cfg *pcie_cfg;
1459 struct device *dev = &pdev->dev;
1460 struct qcom_pcie *pcie;
1461 struct dw_pcie_rp *pp;
1462 struct resource *res;
1463 struct dw_pcie *pci;
1466 pcie_cfg = of_device_get_match_data(dev);
1467 if (!pcie_cfg || !pcie_cfg->ops) {
1468 dev_err(dev, "Invalid platform data\n");
1472 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
1476 pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
1480 pm_runtime_enable(dev);
1481 ret = pm_runtime_get_sync(dev);
1483 goto err_pm_runtime_put;
1486 pci->ops = &dw_pcie_ops;
1491 pcie->cfg = pcie_cfg;
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;
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;
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;
1511 /* MHI region is optional */
1512 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mhi");
1514 pcie->mhi = devm_ioremap_resource(dev, res);
1515 if (IS_ERR(pcie->mhi)) {
1516 ret = PTR_ERR(pcie->mhi);
1517 goto err_pm_runtime_put;
1521 pcie->phy = devm_phy_optional_get(dev, "pciephy");
1522 if (IS_ERR(pcie->phy)) {
1523 ret = PTR_ERR(pcie->phy);
1524 goto err_pm_runtime_put;
1527 ret = qcom_pcie_icc_init(pcie);
1529 goto err_pm_runtime_put;
1531 ret = pcie->cfg->ops->get_resources(pcie);
1533 goto err_pm_runtime_put;
1535 pp->ops = &qcom_pcie_dw_ops;
1537 ret = phy_init(pcie->phy);
1539 goto err_pm_runtime_put;
1541 platform_set_drvdata(pdev, pcie);
1543 ret = dw_pcie_host_init(pp);
1545 dev_err(dev, "cannot initialize host\n");
1549 qcom_pcie_icc_update(pcie);
1552 qcom_pcie_init_debugfs(pcie);
1557 phy_exit(pcie->phy);
1559 pm_runtime_put(dev);
1560 pm_runtime_disable(dev);
1565 static int qcom_pcie_suspend_noirq(struct device *dev)
1567 struct qcom_pcie *pcie = dev_get_drvdata(dev);
1571 * Set minimum bandwidth required to keep data path functional during
1574 ret = icc_set_bw(pcie->icc_mem, 0, kBps_to_icc(1));
1576 dev_err(dev, "Failed to set interconnect bandwidth: %d\n", ret);
1581 * Turn OFF the resources only for controllers without active PCIe
1582 * devices. For controllers with active devices, the resources are kept
1583 * ON and the link is expected to be in L0/L1 (sub)states.
1585 * Turning OFF the resources for controllers with active PCIe devices
1586 * will trigger access violation during the end of the suspend cycle,
1587 * as kernel tries to access the PCIe devices config space for masking
1590 * Also, it is not desirable to put the link into L2/L3 state as that
1591 * implies VDD supply will be removed and the devices may go into
1592 * powerdown state. This will affect the lifetime of the storage devices
1595 if (!dw_pcie_link_up(pcie->pci)) {
1596 qcom_pcie_host_deinit(&pcie->pci->pp);
1597 pcie->suspended = true;
1603 static int qcom_pcie_resume_noirq(struct device *dev)
1605 struct qcom_pcie *pcie = dev_get_drvdata(dev);
1608 if (pcie->suspended) {
1609 ret = qcom_pcie_host_init(&pcie->pci->pp);
1613 pcie->suspended = false;
1616 qcom_pcie_icc_update(pcie);
1621 static const struct of_device_id qcom_pcie_match[] = {
1622 { .compatible = "qcom,pcie-apq8064", .data = &cfg_2_1_0 },
1623 { .compatible = "qcom,pcie-apq8084", .data = &cfg_1_0_0 },
1624 { .compatible = "qcom,pcie-ipq4019", .data = &cfg_2_4_0 },
1625 { .compatible = "qcom,pcie-ipq6018", .data = &cfg_2_9_0 },
1626 { .compatible = "qcom,pcie-ipq8064", .data = &cfg_2_1_0 },
1627 { .compatible = "qcom,pcie-ipq8064-v2", .data = &cfg_2_1_0 },
1628 { .compatible = "qcom,pcie-ipq8074", .data = &cfg_2_3_3 },
1629 { .compatible = "qcom,pcie-ipq8074-gen3", .data = &cfg_2_9_0 },
1630 { .compatible = "qcom,pcie-msm8996", .data = &cfg_2_3_2 },
1631 { .compatible = "qcom,pcie-qcs404", .data = &cfg_2_4_0 },
1632 { .compatible = "qcom,pcie-sa8540p", .data = &cfg_1_9_0 },
1633 { .compatible = "qcom,pcie-sa8775p", .data = &cfg_1_9_0},
1634 { .compatible = "qcom,pcie-sc7280", .data = &cfg_1_9_0 },
1635 { .compatible = "qcom,pcie-sc8180x", .data = &cfg_1_9_0 },
1636 { .compatible = "qcom,pcie-sc8280xp", .data = &cfg_1_9_0 },
1637 { .compatible = "qcom,pcie-sdm845", .data = &cfg_2_7_0 },
1638 { .compatible = "qcom,pcie-sdx55", .data = &cfg_1_9_0 },
1639 { .compatible = "qcom,pcie-sm8150", .data = &cfg_1_9_0 },
1640 { .compatible = "qcom,pcie-sm8250", .data = &cfg_1_9_0 },
1641 { .compatible = "qcom,pcie-sm8350", .data = &cfg_1_9_0 },
1642 { .compatible = "qcom,pcie-sm8450-pcie0", .data = &cfg_1_9_0 },
1643 { .compatible = "qcom,pcie-sm8450-pcie1", .data = &cfg_1_9_0 },
1644 { .compatible = "qcom,pcie-sm8550", .data = &cfg_1_9_0 },
1648 static void qcom_fixup_class(struct pci_dev *dev)
1650 dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL;
1652 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0101, qcom_fixup_class);
1653 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0104, qcom_fixup_class);
1654 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0106, qcom_fixup_class);
1655 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0107, qcom_fixup_class);
1656 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class);
1657 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class);
1658 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class);
1660 static const struct dev_pm_ops qcom_pcie_pm_ops = {
1661 NOIRQ_SYSTEM_SLEEP_PM_OPS(qcom_pcie_suspend_noirq, qcom_pcie_resume_noirq)
1664 static struct platform_driver qcom_pcie_driver = {
1665 .probe = qcom_pcie_probe,
1667 .name = "qcom-pcie",
1668 .suppress_bind_attrs = true,
1669 .of_match_table = qcom_pcie_match,
1670 .pm = &qcom_pcie_pm_ops,
1671 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1674 builtin_platform_driver(qcom_pcie_driver);