2 * Rockchip AXI PCIe host controller driver
4 * Copyright (c) 2016 Rockchip, Inc.
6 * Author: Shawn Lin <shawn.lin@rock-chips.com>
7 * Wenrui Li <wenrui.li@rock-chips.com>
9 * Bits taken from Synopsys Designware Host controller driver and
10 * ARM PCI Host generic driver.
12 * This program is free software: you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation, either version 2 of the License, or
15 * (at your option) any later version.
18 #include <linux/clk.h>
19 #include <linux/delay.h>
20 #include <linux/gpio/consumer.h>
21 #include <linux/init.h>
22 #include <linux/interrupt.h>
23 #include <linux/iopoll.h>
24 #include <linux/irq.h>
25 #include <linux/irqchip/chained_irq.h>
26 #include <linux/irqdomain.h>
27 #include <linux/kernel.h>
28 #include <linux/mfd/syscon.h>
29 #include <linux/of_address.h>
30 #include <linux/of_device.h>
31 #include <linux/of_pci.h>
32 #include <linux/of_platform.h>
33 #include <linux/of_irq.h>
34 #include <linux/pci.h>
35 #include <linux/pci_ids.h>
36 #include <linux/phy/phy.h>
37 #include <linux/platform_device.h>
38 #include <linux/reset.h>
39 #include <linux/regmap.h>
42 * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16
43 * bits. This allows atomic updates of the register without locking.
45 #define HIWORD_UPDATE(mask, val) (((mask) << 16) | (val))
46 #define HIWORD_UPDATE_BIT(val) HIWORD_UPDATE(val, val)
48 #define ENCODE_LANES(x) ((((x) >> 1) & 3) << 4)
50 #define PCIE_CLIENT_BASE 0x0
51 #define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
52 #define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001)
53 #define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002)
54 #define PCIE_CLIENT_ARI_ENABLE HIWORD_UPDATE_BIT(0x0008)
55 #define PCIE_CLIENT_CONF_LANE_NUM(x) HIWORD_UPDATE(0x0030, ENCODE_LANES(x))
56 #define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040)
57 #define PCIE_CLIENT_GEN_SEL_1 HIWORD_UPDATE(0x0080, 0)
58 #define PCIE_CLIENT_GEN_SEL_2 HIWORD_UPDATE_BIT(0x0080)
59 #define PCIE_CLIENT_DEBUG_OUT_0 (PCIE_CLIENT_BASE + 0x3c)
60 #define PCIE_CLIENT_DEBUG_LTSSM_MASK GENMASK(5, 0)
61 #define PCIE_CLIENT_DEBUG_LTSSM_L1 0x18
62 #define PCIE_CLIENT_DEBUG_LTSSM_L2 0x19
63 #define PCIE_CLIENT_BASIC_STATUS1 (PCIE_CLIENT_BASE + 0x48)
64 #define PCIE_CLIENT_LINK_STATUS_UP 0x00300000
65 #define PCIE_CLIENT_LINK_STATUS_MASK 0x00300000
66 #define PCIE_CLIENT_INT_MASK (PCIE_CLIENT_BASE + 0x4c)
67 #define PCIE_CLIENT_INT_STATUS (PCIE_CLIENT_BASE + 0x50)
68 #define PCIE_CLIENT_INTR_MASK GENMASK(8, 5)
69 #define PCIE_CLIENT_INTR_SHIFT 5
70 #define PCIE_CLIENT_INT_LEGACY_DONE BIT(15)
71 #define PCIE_CLIENT_INT_MSG BIT(14)
72 #define PCIE_CLIENT_INT_HOT_RST BIT(13)
73 #define PCIE_CLIENT_INT_DPA BIT(12)
74 #define PCIE_CLIENT_INT_FATAL_ERR BIT(11)
75 #define PCIE_CLIENT_INT_NFATAL_ERR BIT(10)
76 #define PCIE_CLIENT_INT_CORR_ERR BIT(9)
77 #define PCIE_CLIENT_INT_INTD BIT(8)
78 #define PCIE_CLIENT_INT_INTC BIT(7)
79 #define PCIE_CLIENT_INT_INTB BIT(6)
80 #define PCIE_CLIENT_INT_INTA BIT(5)
81 #define PCIE_CLIENT_INT_LOCAL BIT(4)
82 #define PCIE_CLIENT_INT_UDMA BIT(3)
83 #define PCIE_CLIENT_INT_PHY BIT(2)
84 #define PCIE_CLIENT_INT_HOT_PLUG BIT(1)
85 #define PCIE_CLIENT_INT_PWR_STCG BIT(0)
87 #define PCIE_CLIENT_INT_LEGACY \
88 (PCIE_CLIENT_INT_INTA | PCIE_CLIENT_INT_INTB | \
89 PCIE_CLIENT_INT_INTC | PCIE_CLIENT_INT_INTD)
91 #define PCIE_CLIENT_INT_CLI \
92 (PCIE_CLIENT_INT_CORR_ERR | PCIE_CLIENT_INT_NFATAL_ERR | \
93 PCIE_CLIENT_INT_FATAL_ERR | PCIE_CLIENT_INT_DPA | \
94 PCIE_CLIENT_INT_HOT_RST | PCIE_CLIENT_INT_MSG | \
95 PCIE_CLIENT_INT_LEGACY_DONE | PCIE_CLIENT_INT_LEGACY | \
98 #define PCIE_CORE_CTRL_MGMT_BASE 0x900000
99 #define PCIE_CORE_CTRL (PCIE_CORE_CTRL_MGMT_BASE + 0x000)
100 #define PCIE_CORE_PL_CONF_SPEED_5G 0x00000008
101 #define PCIE_CORE_PL_CONF_SPEED_MASK 0x00000018
102 #define PCIE_CORE_PL_CONF_LANE_MASK 0x00000006
103 #define PCIE_CORE_PL_CONF_LANE_SHIFT 1
104 #define PCIE_CORE_CTRL_PLC1 (PCIE_CORE_CTRL_MGMT_BASE + 0x004)
105 #define PCIE_CORE_CTRL_PLC1_FTS_MASK GENMASK(23, 8)
106 #define PCIE_CORE_CTRL_PLC1_FTS_SHIFT 8
107 #define PCIE_CORE_CTRL_PLC1_FTS_CNT 0xffff
108 #define PCIE_CORE_TXCREDIT_CFG1 (PCIE_CORE_CTRL_MGMT_BASE + 0x020)
109 #define PCIE_CORE_TXCREDIT_CFG1_MUI_MASK 0xFFFF0000
110 #define PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT 16
111 #define PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(x) \
112 (((x) >> 3) << PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT)
113 #define PCIE_CORE_INT_STATUS (PCIE_CORE_CTRL_MGMT_BASE + 0x20c)
114 #define PCIE_CORE_INT_PRFPE BIT(0)
115 #define PCIE_CORE_INT_CRFPE BIT(1)
116 #define PCIE_CORE_INT_RRPE BIT(2)
117 #define PCIE_CORE_INT_PRFO BIT(3)
118 #define PCIE_CORE_INT_CRFO BIT(4)
119 #define PCIE_CORE_INT_RT BIT(5)
120 #define PCIE_CORE_INT_RTR BIT(6)
121 #define PCIE_CORE_INT_PE BIT(7)
122 #define PCIE_CORE_INT_MTR BIT(8)
123 #define PCIE_CORE_INT_UCR BIT(9)
124 #define PCIE_CORE_INT_FCE BIT(10)
125 #define PCIE_CORE_INT_CT BIT(11)
126 #define PCIE_CORE_INT_UTC BIT(18)
127 #define PCIE_CORE_INT_MMVC BIT(19)
128 #define PCIE_CORE_INT_MASK (PCIE_CORE_CTRL_MGMT_BASE + 0x210)
129 #define PCIE_RC_BAR_CONF (PCIE_CORE_CTRL_MGMT_BASE + 0x300)
131 #define PCIE_CORE_INT \
132 (PCIE_CORE_INT_PRFPE | PCIE_CORE_INT_CRFPE | \
133 PCIE_CORE_INT_RRPE | PCIE_CORE_INT_CRFO | \
134 PCIE_CORE_INT_RT | PCIE_CORE_INT_RTR | \
135 PCIE_CORE_INT_PE | PCIE_CORE_INT_MTR | \
136 PCIE_CORE_INT_UCR | PCIE_CORE_INT_FCE | \
137 PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
140 #define PCIE_RC_CONFIG_BASE 0xa00000
141 #define PCIE_RC_CONFIG_VENDOR (PCIE_RC_CONFIG_BASE + 0x00)
142 #define PCIE_RC_CONFIG_RID_CCR (PCIE_RC_CONFIG_BASE + 0x08)
143 #define PCIE_RC_CONFIG_SCC_SHIFT 16
144 #define PCIE_RC_CONFIG_DCR (PCIE_RC_CONFIG_BASE + 0xc4)
145 #define PCIE_RC_CONFIG_DCR_CSPL_SHIFT 18
146 #define PCIE_RC_CONFIG_DCR_CSPL_LIMIT 0xff
147 #define PCIE_RC_CONFIG_DCR_CPLS_SHIFT 26
148 #define PCIE_RC_CONFIG_LINK_CAP (PCIE_RC_CONFIG_BASE + 0xcc)
149 #define PCIE_RC_CONFIG_LINK_CAP_L0S BIT(10)
150 #define PCIE_RC_CONFIG_LCS (PCIE_RC_CONFIG_BASE + 0xd0)
151 #define PCIE_RC_CONFIG_L1_SUBSTATE_CTRL2 (PCIE_RC_CONFIG_BASE + 0x90c)
152 #define PCIE_RC_CONFIG_THP_CAP (PCIE_RC_CONFIG_BASE + 0x274)
153 #define PCIE_RC_CONFIG_THP_CAP_NEXT_MASK GENMASK(31, 20)
155 #define PCIE_CORE_AXI_CONF_BASE 0xc00000
156 #define PCIE_CORE_OB_REGION_ADDR0 (PCIE_CORE_AXI_CONF_BASE + 0x0)
157 #define PCIE_CORE_OB_REGION_ADDR0_NUM_BITS 0x3f
158 #define PCIE_CORE_OB_REGION_ADDR0_LO_ADDR 0xffffff00
159 #define PCIE_CORE_OB_REGION_ADDR1 (PCIE_CORE_AXI_CONF_BASE + 0x4)
160 #define PCIE_CORE_OB_REGION_DESC0 (PCIE_CORE_AXI_CONF_BASE + 0x8)
161 #define PCIE_CORE_OB_REGION_DESC1 (PCIE_CORE_AXI_CONF_BASE + 0xc)
163 #define PCIE_CORE_AXI_INBOUND_BASE 0xc00800
164 #define PCIE_RP_IB_ADDR0 (PCIE_CORE_AXI_INBOUND_BASE + 0x0)
165 #define PCIE_CORE_IB_REGION_ADDR0_NUM_BITS 0x3f
166 #define PCIE_CORE_IB_REGION_ADDR0_LO_ADDR 0xffffff00
167 #define PCIE_RP_IB_ADDR1 (PCIE_CORE_AXI_INBOUND_BASE + 0x4)
169 /* Size of one AXI Region (not Region 0) */
170 #define AXI_REGION_SIZE BIT(20)
171 /* Size of Region 0, equal to sum of sizes of other regions */
172 #define AXI_REGION_0_SIZE (32 * (0x1 << 20))
173 #define OB_REG_SIZE_SHIFT 5
174 #define IB_ROOT_PORT_REG_SIZE_SHIFT 3
175 #define AXI_WRAPPER_IO_WRITE 0x6
176 #define AXI_WRAPPER_MEM_WRITE 0x2
177 #define AXI_WRAPPER_NOR_MSG 0xc
179 #define MAX_AXI_IB_ROOTPORT_REGION_NUM 3
180 #define MIN_AXI_ADDR_BITS_PASSED 8
181 #define PCIE_RC_SEND_PME_OFF 0x11960
182 #define ROCKCHIP_VENDOR_ID 0x1d87
183 #define PCIE_ECAM_BUS(x) (((x) & 0xff) << 20)
184 #define PCIE_ECAM_DEV(x) (((x) & 0x1f) << 15)
185 #define PCIE_ECAM_FUNC(x) (((x) & 0x7) << 12)
186 #define PCIE_ECAM_REG(x) (((x) & 0xfff) << 0)
187 #define PCIE_ECAM_ADDR(bus, dev, func, reg) \
188 (PCIE_ECAM_BUS(bus) | PCIE_ECAM_DEV(dev) | \
189 PCIE_ECAM_FUNC(func) | PCIE_ECAM_REG(reg))
190 #define PCIE_LINK_IS_L2(x) \
191 (((x) & PCIE_CLIENT_DEBUG_LTSSM_MASK) == PCIE_CLIENT_DEBUG_LTSSM_L2)
193 #define RC_REGION_0_ADDR_TRANS_H 0x00000000
194 #define RC_REGION_0_ADDR_TRANS_L 0x00000000
195 #define RC_REGION_0_PASS_BITS (25 - 1)
196 #define MAX_AXI_WRAPPER_REGION_NUM 33
198 struct rockchip_pcie {
199 void __iomem *reg_base; /* DT axi-base */
200 void __iomem *apb_base; /* DT apb-base */
202 struct reset_control *core_rst;
203 struct reset_control *mgmt_rst;
204 struct reset_control *mgmt_sticky_rst;
205 struct reset_control *pipe_rst;
206 struct reset_control *pm_rst;
207 struct reset_control *aclk_rst;
208 struct reset_control *pclk_rst;
209 struct clk *aclk_pcie;
210 struct clk *aclk_perf_pcie;
211 struct clk *hclk_pcie;
212 struct clk *clk_pcie_pm;
213 struct regulator *vpcie3v3; /* 3.3V power supply */
214 struct regulator *vpcie1v8; /* 1.8V power supply */
215 struct regulator *vpcie0v9; /* 0.9V power supply */
216 struct gpio_desc *ep_gpio;
221 struct irq_domain *irq_domain;
224 phys_addr_t io_bus_addr;
225 void __iomem *msg_region;
227 phys_addr_t msg_bus_addr;
228 phys_addr_t mem_bus_addr;
231 static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
233 return readl(rockchip->apb_base + reg);
236 static void rockchip_pcie_write(struct rockchip_pcie *rockchip, u32 val,
239 writel(val, rockchip->apb_base + reg);
242 static void rockchip_pcie_enable_bw_int(struct rockchip_pcie *rockchip)
246 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
247 status |= (PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
248 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
251 static void rockchip_pcie_clr_bw_int(struct rockchip_pcie *rockchip)
255 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
256 status |= (PCI_EXP_LNKSTA_LBMS | PCI_EXP_LNKSTA_LABS) << 16;
257 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
260 static void rockchip_pcie_update_txcredit_mui(struct rockchip_pcie *rockchip)
264 /* Update Tx credit maximum update interval */
265 val = rockchip_pcie_read(rockchip, PCIE_CORE_TXCREDIT_CFG1);
266 val &= ~PCIE_CORE_TXCREDIT_CFG1_MUI_MASK;
267 val |= PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(24000); /* ns */
268 rockchip_pcie_write(rockchip, val, PCIE_CORE_TXCREDIT_CFG1);
271 static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
272 struct pci_bus *bus, int dev)
274 /* access only one slot on each root port */
275 if (bus->number == rockchip->root_bus_nr && dev > 0)
279 * do not read more than one device on the bus directly attached
280 * to RC's downstream side.
282 if (bus->primary == rockchip->root_bus_nr && dev > 0)
288 static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
289 int where, int size, u32 *val)
291 void __iomem *addr = rockchip->apb_base + PCIE_RC_CONFIG_BASE + where;
293 if (!IS_ALIGNED((uintptr_t)addr, size)) {
295 return PCIBIOS_BAD_REGISTER_NUMBER;
300 } else if (size == 2) {
302 } else if (size == 1) {
306 return PCIBIOS_BAD_REGISTER_NUMBER;
308 return PCIBIOS_SUCCESSFUL;
311 static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
312 int where, int size, u32 val)
314 u32 mask, tmp, offset;
316 offset = where & ~0x3;
319 writel(val, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
320 return PCIBIOS_SUCCESSFUL;
323 mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
326 * N.B. This read/modify/write isn't safe in general because it can
327 * corrupt RW1C bits in adjacent registers. But the hardware
328 * doesn't support smaller writes.
330 tmp = readl(rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset) & mask;
331 tmp |= val << ((where & 0x3) * 8);
332 writel(tmp, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
334 return PCIBIOS_SUCCESSFUL;
337 static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
338 struct pci_bus *bus, u32 devfn,
339 int where, int size, u32 *val)
343 busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
344 PCI_FUNC(devfn), where);
346 if (!IS_ALIGNED(busdev, size)) {
348 return PCIBIOS_BAD_REGISTER_NUMBER;
352 *val = readl(rockchip->reg_base + busdev);
353 } else if (size == 2) {
354 *val = readw(rockchip->reg_base + busdev);
355 } else if (size == 1) {
356 *val = readb(rockchip->reg_base + busdev);
359 return PCIBIOS_BAD_REGISTER_NUMBER;
361 return PCIBIOS_SUCCESSFUL;
364 static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
365 struct pci_bus *bus, u32 devfn,
366 int where, int size, u32 val)
370 busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
371 PCI_FUNC(devfn), where);
372 if (!IS_ALIGNED(busdev, size))
373 return PCIBIOS_BAD_REGISTER_NUMBER;
376 writel(val, rockchip->reg_base + busdev);
378 writew(val, rockchip->reg_base + busdev);
380 writeb(val, rockchip->reg_base + busdev);
382 return PCIBIOS_BAD_REGISTER_NUMBER;
384 return PCIBIOS_SUCCESSFUL;
387 static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
390 struct rockchip_pcie *rockchip = bus->sysdata;
392 if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
394 return PCIBIOS_DEVICE_NOT_FOUND;
397 if (bus->number == rockchip->root_bus_nr)
398 return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
400 return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size, val);
403 static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
404 int where, int size, u32 val)
406 struct rockchip_pcie *rockchip = bus->sysdata;
408 if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
409 return PCIBIOS_DEVICE_NOT_FOUND;
411 if (bus->number == rockchip->root_bus_nr)
412 return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
414 return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size, val);
417 static struct pci_ops rockchip_pcie_ops = {
418 .read = rockchip_pcie_rd_conf,
419 .write = rockchip_pcie_wr_conf,
422 static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
424 u32 status, curr, scale, power;
426 if (IS_ERR(rockchip->vpcie3v3))
430 * Set RC's captured slot power limit and scale if
431 * vpcie3v3 available. The default values are both zero
432 * which means the software should set these two according
433 * to the actual power supply.
435 curr = regulator_get_current_limit(rockchip->vpcie3v3);
437 scale = 3; /* 0.001x */
438 curr = curr / 1000; /* convert to mA */
439 power = (curr * 3300) / 1000; /* milliwatt */
440 while (power > PCIE_RC_CONFIG_DCR_CSPL_LIMIT) {
442 dev_warn(rockchip->dev, "invalid power supply\n");
449 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCR);
450 status |= (power << PCIE_RC_CONFIG_DCR_CSPL_SHIFT) |
451 (scale << PCIE_RC_CONFIG_DCR_CPLS_SHIFT);
452 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCR);
457 * rockchip_pcie_init_port - Initialize hardware
458 * @rockchip: PCIe port information
460 static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
462 struct device *dev = rockchip->dev;
465 unsigned long timeout;
467 gpiod_set_value(rockchip->ep_gpio, 0);
469 err = reset_control_assert(rockchip->aclk_rst);
471 dev_err(dev, "assert aclk_rst err %d\n", err);
475 err = reset_control_assert(rockchip->pclk_rst);
477 dev_err(dev, "assert pclk_rst err %d\n", err);
481 err = reset_control_assert(rockchip->pm_rst);
483 dev_err(dev, "assert pm_rst err %d\n", err);
487 err = phy_init(rockchip->phy);
489 dev_err(dev, "fail to init phy, err %d\n", err);
493 err = reset_control_assert(rockchip->core_rst);
495 dev_err(dev, "assert core_rst err %d\n", err);
499 err = reset_control_assert(rockchip->mgmt_rst);
501 dev_err(dev, "assert mgmt_rst err %d\n", err);
505 err = reset_control_assert(rockchip->mgmt_sticky_rst);
507 dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
511 err = reset_control_assert(rockchip->pipe_rst);
513 dev_err(dev, "assert pipe_rst err %d\n", err);
519 err = reset_control_deassert(rockchip->pm_rst);
521 dev_err(dev, "deassert pm_rst err %d\n", err);
525 err = reset_control_deassert(rockchip->aclk_rst);
527 dev_err(dev, "deassert aclk_rst err %d\n", err);
531 err = reset_control_deassert(rockchip->pclk_rst);
533 dev_err(dev, "deassert pclk_rst err %d\n", err);
537 if (rockchip->link_gen == 2)
538 rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_2,
541 rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_1,
544 rockchip_pcie_write(rockchip,
545 PCIE_CLIENT_CONF_ENABLE |
546 PCIE_CLIENT_LINK_TRAIN_ENABLE |
547 PCIE_CLIENT_ARI_ENABLE |
548 PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes) |
552 err = phy_power_on(rockchip->phy);
554 dev_err(dev, "fail to power on phy, err %d\n", err);
559 * Please don't reorder the deassert sequence of the following
562 err = reset_control_deassert(rockchip->mgmt_sticky_rst);
564 dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
568 err = reset_control_deassert(rockchip->core_rst);
570 dev_err(dev, "deassert core_rst err %d\n", err);
574 err = reset_control_deassert(rockchip->mgmt_rst);
576 dev_err(dev, "deassert mgmt_rst err %d\n", err);
580 err = reset_control_deassert(rockchip->pipe_rst);
582 dev_err(dev, "deassert pipe_rst err %d\n", err);
586 /* Fix the transmitted FTS count desired to exit from L0s. */
587 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL_PLC1);
588 status = (status & ~PCIE_CORE_CTRL_PLC1_FTS_MASK) |
589 (PCIE_CORE_CTRL_PLC1_FTS_CNT << PCIE_CORE_CTRL_PLC1_FTS_SHIFT);
590 rockchip_pcie_write(rockchip, status, PCIE_CORE_CTRL_PLC1);
592 rockchip_pcie_set_power_limit(rockchip);
594 /* Set RC's clock architecture as common clock */
595 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
596 status |= PCI_EXP_LNKCTL_CCC;
597 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
599 /* Enable Gen1 training */
600 rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
603 gpiod_set_value(rockchip->ep_gpio, 1);
605 /* 500ms timeout value should be enough for Gen1/2 training */
606 timeout = jiffies + msecs_to_jiffies(500);
609 status = rockchip_pcie_read(rockchip,
610 PCIE_CLIENT_BASIC_STATUS1);
611 if ((status & PCIE_CLIENT_LINK_STATUS_MASK) ==
612 PCIE_CLIENT_LINK_STATUS_UP) {
613 dev_dbg(dev, "PCIe link training gen1 pass!\n");
617 if (time_after(jiffies, timeout)) {
618 dev_err(dev, "PCIe link training gen1 timeout!\n");
625 if (rockchip->link_gen == 2) {
627 * Enable retrain for gen2. This should be configured only after
630 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
631 status |= PCI_EXP_LNKCTL_RL;
632 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
634 timeout = jiffies + msecs_to_jiffies(500);
636 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
637 if ((status & PCIE_CORE_PL_CONF_SPEED_MASK) ==
638 PCIE_CORE_PL_CONF_SPEED_5G) {
639 dev_dbg(dev, "PCIe link training gen2 pass!\n");
643 if (time_after(jiffies, timeout)) {
644 dev_dbg(dev, "PCIe link training gen2 timeout, fall back to gen1!\n");
652 /* Check the final link width from negotiated lane counter from MGMT */
653 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
654 status = 0x1 << ((status & PCIE_CORE_PL_CONF_LANE_MASK) >>
655 PCIE_CORE_PL_CONF_LANE_SHIFT);
656 dev_dbg(dev, "current link width is x%d\n", status);
658 rockchip_pcie_write(rockchip, ROCKCHIP_VENDOR_ID,
659 PCIE_RC_CONFIG_VENDOR);
660 rockchip_pcie_write(rockchip,
661 PCI_CLASS_BRIDGE_PCI << PCIE_RC_CONFIG_SCC_SHIFT,
662 PCIE_RC_CONFIG_RID_CCR);
664 /* Clear THP cap's next cap pointer to remove L1 substate cap */
665 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_THP_CAP);
666 status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK;
667 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_THP_CAP);
669 /* Clear L0s from RC's link cap */
670 if (of_property_read_bool(dev->of_node, "aspm-no-l0s")) {
671 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LINK_CAP);
672 status &= ~PCIE_RC_CONFIG_LINK_CAP_L0S;
673 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LINK_CAP);
676 rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
678 rockchip_pcie_write(rockchip,
679 (RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
680 PCIE_CORE_OB_REGION_ADDR0);
681 rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
682 PCIE_CORE_OB_REGION_ADDR1);
683 rockchip_pcie_write(rockchip, 0x0080000a, PCIE_CORE_OB_REGION_DESC0);
684 rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
689 static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
691 struct rockchip_pcie *rockchip = arg;
692 struct device *dev = rockchip->dev;
696 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
697 if (reg & PCIE_CLIENT_INT_LOCAL) {
698 dev_dbg(dev, "local interrupt received\n");
699 sub_reg = rockchip_pcie_read(rockchip, PCIE_CORE_INT_STATUS);
700 if (sub_reg & PCIE_CORE_INT_PRFPE)
701 dev_dbg(dev, "parity error detected while reading from the PNP receive FIFO RAM\n");
703 if (sub_reg & PCIE_CORE_INT_CRFPE)
704 dev_dbg(dev, "parity error detected while reading from the Completion Receive FIFO RAM\n");
706 if (sub_reg & PCIE_CORE_INT_RRPE)
707 dev_dbg(dev, "parity error detected while reading from replay buffer RAM\n");
709 if (sub_reg & PCIE_CORE_INT_PRFO)
710 dev_dbg(dev, "overflow occurred in the PNP receive FIFO\n");
712 if (sub_reg & PCIE_CORE_INT_CRFO)
713 dev_dbg(dev, "overflow occurred in the completion receive FIFO\n");
715 if (sub_reg & PCIE_CORE_INT_RT)
716 dev_dbg(dev, "replay timer timed out\n");
718 if (sub_reg & PCIE_CORE_INT_RTR)
719 dev_dbg(dev, "replay timer rolled over after 4 transmissions of the same TLP\n");
721 if (sub_reg & PCIE_CORE_INT_PE)
722 dev_dbg(dev, "phy error detected on receive side\n");
724 if (sub_reg & PCIE_CORE_INT_MTR)
725 dev_dbg(dev, "malformed TLP received from the link\n");
727 if (sub_reg & PCIE_CORE_INT_UCR)
728 dev_dbg(dev, "malformed TLP received from the link\n");
730 if (sub_reg & PCIE_CORE_INT_FCE)
731 dev_dbg(dev, "an error was observed in the flow control advertisements from the other side\n");
733 if (sub_reg & PCIE_CORE_INT_CT)
734 dev_dbg(dev, "a request timed out waiting for completion\n");
736 if (sub_reg & PCIE_CORE_INT_UTC)
737 dev_dbg(dev, "unmapped TC error\n");
739 if (sub_reg & PCIE_CORE_INT_MMVC)
740 dev_dbg(dev, "MSI mask register changes\n");
742 rockchip_pcie_write(rockchip, sub_reg, PCIE_CORE_INT_STATUS);
743 } else if (reg & PCIE_CLIENT_INT_PHY) {
744 dev_dbg(dev, "phy link changes\n");
745 rockchip_pcie_update_txcredit_mui(rockchip);
746 rockchip_pcie_clr_bw_int(rockchip);
749 rockchip_pcie_write(rockchip, reg & PCIE_CLIENT_INT_LOCAL,
750 PCIE_CLIENT_INT_STATUS);
755 static irqreturn_t rockchip_pcie_client_irq_handler(int irq, void *arg)
757 struct rockchip_pcie *rockchip = arg;
758 struct device *dev = rockchip->dev;
761 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
762 if (reg & PCIE_CLIENT_INT_LEGACY_DONE)
763 dev_dbg(dev, "legacy done interrupt received\n");
765 if (reg & PCIE_CLIENT_INT_MSG)
766 dev_dbg(dev, "message done interrupt received\n");
768 if (reg & PCIE_CLIENT_INT_HOT_RST)
769 dev_dbg(dev, "hot reset interrupt received\n");
771 if (reg & PCIE_CLIENT_INT_DPA)
772 dev_dbg(dev, "dpa interrupt received\n");
774 if (reg & PCIE_CLIENT_INT_FATAL_ERR)
775 dev_dbg(dev, "fatal error interrupt received\n");
777 if (reg & PCIE_CLIENT_INT_NFATAL_ERR)
778 dev_dbg(dev, "no fatal error interrupt received\n");
780 if (reg & PCIE_CLIENT_INT_CORR_ERR)
781 dev_dbg(dev, "correctable error interrupt received\n");
783 if (reg & PCIE_CLIENT_INT_PHY)
784 dev_dbg(dev, "phy interrupt received\n");
786 rockchip_pcie_write(rockchip, reg & (PCIE_CLIENT_INT_LEGACY_DONE |
787 PCIE_CLIENT_INT_MSG | PCIE_CLIENT_INT_HOT_RST |
788 PCIE_CLIENT_INT_DPA | PCIE_CLIENT_INT_FATAL_ERR |
789 PCIE_CLIENT_INT_NFATAL_ERR |
790 PCIE_CLIENT_INT_CORR_ERR |
791 PCIE_CLIENT_INT_PHY),
792 PCIE_CLIENT_INT_STATUS);
797 static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
799 struct irq_chip *chip = irq_desc_get_chip(desc);
800 struct rockchip_pcie *rockchip = irq_desc_get_handler_data(desc);
801 struct device *dev = rockchip->dev;
806 chained_irq_enter(chip, desc);
808 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
809 reg = (reg & PCIE_CLIENT_INTR_MASK) >> PCIE_CLIENT_INTR_SHIFT;
812 hwirq = ffs(reg) - 1;
815 virq = irq_find_mapping(rockchip->irq_domain, hwirq);
817 generic_handle_irq(virq);
819 dev_err(dev, "unexpected IRQ, INT%d\n", hwirq);
822 chained_irq_exit(chip, desc);
827 * rockchip_pcie_parse_dt - Parse Device Tree
828 * @rockchip: PCIe port information
830 * Return: '0' on success and error value on failure
832 static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
834 struct device *dev = rockchip->dev;
835 struct platform_device *pdev = to_platform_device(dev);
836 struct device_node *node = dev->of_node;
837 struct resource *regs;
841 regs = platform_get_resource_byname(pdev,
844 rockchip->reg_base = devm_ioremap_resource(dev, regs);
845 if (IS_ERR(rockchip->reg_base))
846 return PTR_ERR(rockchip->reg_base);
848 regs = platform_get_resource_byname(pdev,
851 rockchip->apb_base = devm_ioremap_resource(dev, regs);
852 if (IS_ERR(rockchip->apb_base))
853 return PTR_ERR(rockchip->apb_base);
855 rockchip->phy = devm_phy_get(dev, "pcie-phy");
856 if (IS_ERR(rockchip->phy)) {
857 if (PTR_ERR(rockchip->phy) != -EPROBE_DEFER)
858 dev_err(dev, "missing phy\n");
859 return PTR_ERR(rockchip->phy);
863 err = of_property_read_u32(node, "num-lanes", &rockchip->lanes);
864 if (!err && (rockchip->lanes == 0 ||
865 rockchip->lanes == 3 ||
866 rockchip->lanes > 4)) {
867 dev_warn(dev, "invalid num-lanes, default to use one lane\n");
871 rockchip->link_gen = of_pci_get_max_link_speed(node);
872 if (rockchip->link_gen < 0 || rockchip->link_gen > 2)
873 rockchip->link_gen = 2;
875 rockchip->core_rst = devm_reset_control_get(dev, "core");
876 if (IS_ERR(rockchip->core_rst)) {
877 if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER)
878 dev_err(dev, "missing core reset property in node\n");
879 return PTR_ERR(rockchip->core_rst);
882 rockchip->mgmt_rst = devm_reset_control_get(dev, "mgmt");
883 if (IS_ERR(rockchip->mgmt_rst)) {
884 if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER)
885 dev_err(dev, "missing mgmt reset property in node\n");
886 return PTR_ERR(rockchip->mgmt_rst);
889 rockchip->mgmt_sticky_rst = devm_reset_control_get(dev, "mgmt-sticky");
890 if (IS_ERR(rockchip->mgmt_sticky_rst)) {
891 if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER)
892 dev_err(dev, "missing mgmt-sticky reset property in node\n");
893 return PTR_ERR(rockchip->mgmt_sticky_rst);
896 rockchip->pipe_rst = devm_reset_control_get(dev, "pipe");
897 if (IS_ERR(rockchip->pipe_rst)) {
898 if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER)
899 dev_err(dev, "missing pipe reset property in node\n");
900 return PTR_ERR(rockchip->pipe_rst);
903 rockchip->pm_rst = devm_reset_control_get(dev, "pm");
904 if (IS_ERR(rockchip->pm_rst)) {
905 if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
906 dev_err(dev, "missing pm reset property in node\n");
907 return PTR_ERR(rockchip->pm_rst);
910 rockchip->pclk_rst = devm_reset_control_get(dev, "pclk");
911 if (IS_ERR(rockchip->pclk_rst)) {
912 if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
913 dev_err(dev, "missing pclk reset property in node\n");
914 return PTR_ERR(rockchip->pclk_rst);
917 rockchip->aclk_rst = devm_reset_control_get(dev, "aclk");
918 if (IS_ERR(rockchip->aclk_rst)) {
919 if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
920 dev_err(dev, "missing aclk reset property in node\n");
921 return PTR_ERR(rockchip->aclk_rst);
924 rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
925 if (IS_ERR(rockchip->ep_gpio)) {
926 dev_err(dev, "missing ep-gpios property in node\n");
927 return PTR_ERR(rockchip->ep_gpio);
930 rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
931 if (IS_ERR(rockchip->aclk_pcie)) {
932 dev_err(dev, "aclk clock not found\n");
933 return PTR_ERR(rockchip->aclk_pcie);
936 rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
937 if (IS_ERR(rockchip->aclk_perf_pcie)) {
938 dev_err(dev, "aclk_perf clock not found\n");
939 return PTR_ERR(rockchip->aclk_perf_pcie);
942 rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
943 if (IS_ERR(rockchip->hclk_pcie)) {
944 dev_err(dev, "hclk clock not found\n");
945 return PTR_ERR(rockchip->hclk_pcie);
948 rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
949 if (IS_ERR(rockchip->clk_pcie_pm)) {
950 dev_err(dev, "pm clock not found\n");
951 return PTR_ERR(rockchip->clk_pcie_pm);
954 irq = platform_get_irq_byname(pdev, "sys");
956 dev_err(dev, "missing sys IRQ resource\n");
960 err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
961 IRQF_SHARED, "pcie-sys", rockchip);
963 dev_err(dev, "failed to request PCIe subsystem IRQ\n");
967 irq = platform_get_irq_byname(pdev, "legacy");
969 dev_err(dev, "missing legacy IRQ resource\n");
973 irq_set_chained_handler_and_data(irq,
974 rockchip_pcie_legacy_int_handler,
977 irq = platform_get_irq_byname(pdev, "client");
979 dev_err(dev, "missing client IRQ resource\n");
983 err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
984 IRQF_SHARED, "pcie-client", rockchip);
986 dev_err(dev, "failed to request PCIe client IRQ\n");
990 rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
991 if (IS_ERR(rockchip->vpcie3v3)) {
992 if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER)
993 return -EPROBE_DEFER;
994 dev_info(dev, "no vpcie3v3 regulator found\n");
997 rockchip->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8");
998 if (IS_ERR(rockchip->vpcie1v8)) {
999 if (PTR_ERR(rockchip->vpcie1v8) == -EPROBE_DEFER)
1000 return -EPROBE_DEFER;
1001 dev_info(dev, "no vpcie1v8 regulator found\n");
1004 rockchip->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9");
1005 if (IS_ERR(rockchip->vpcie0v9)) {
1006 if (PTR_ERR(rockchip->vpcie0v9) == -EPROBE_DEFER)
1007 return -EPROBE_DEFER;
1008 dev_info(dev, "no vpcie0v9 regulator found\n");
1014 static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)
1016 struct device *dev = rockchip->dev;
1019 if (!IS_ERR(rockchip->vpcie3v3)) {
1020 err = regulator_enable(rockchip->vpcie3v3);
1022 dev_err(dev, "fail to enable vpcie3v3 regulator\n");
1027 if (!IS_ERR(rockchip->vpcie1v8)) {
1028 err = regulator_enable(rockchip->vpcie1v8);
1030 dev_err(dev, "fail to enable vpcie1v8 regulator\n");
1031 goto err_disable_3v3;
1035 if (!IS_ERR(rockchip->vpcie0v9)) {
1036 err = regulator_enable(rockchip->vpcie0v9);
1038 dev_err(dev, "fail to enable vpcie0v9 regulator\n");
1039 goto err_disable_1v8;
1046 if (!IS_ERR(rockchip->vpcie1v8))
1047 regulator_disable(rockchip->vpcie1v8);
1049 if (!IS_ERR(rockchip->vpcie3v3))
1050 regulator_disable(rockchip->vpcie3v3);
1055 static void rockchip_pcie_enable_interrupts(struct rockchip_pcie *rockchip)
1057 rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) &
1058 (~PCIE_CLIENT_INT_CLI), PCIE_CLIENT_INT_MASK);
1059 rockchip_pcie_write(rockchip, (u32)(~PCIE_CORE_INT),
1060 PCIE_CORE_INT_MASK);
1062 rockchip_pcie_enable_bw_int(rockchip);
1065 static int rockchip_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
1066 irq_hw_number_t hwirq)
1068 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
1069 irq_set_chip_data(irq, domain->host_data);
1074 static const struct irq_domain_ops intx_domain_ops = {
1075 .map = rockchip_pcie_intx_map,
1078 static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
1080 struct device *dev = rockchip->dev;
1081 struct device_node *intc = of_get_next_child(dev->of_node, NULL);
1084 dev_err(dev, "missing child interrupt-controller node\n");
1088 rockchip->irq_domain = irq_domain_add_linear(intc, 4,
1089 &intx_domain_ops, rockchip);
1090 if (!rockchip->irq_domain) {
1091 dev_err(dev, "failed to get a INTx IRQ domain\n");
1098 static int rockchip_pcie_prog_ob_atu(struct rockchip_pcie *rockchip,
1099 int region_no, int type, u8 num_pass_bits,
1100 u32 lower_addr, u32 upper_addr)
1107 if (region_no >= MAX_AXI_WRAPPER_REGION_NUM)
1109 if (num_pass_bits + 1 < 8)
1111 if (num_pass_bits > 63)
1113 if (region_no == 0) {
1114 if (AXI_REGION_0_SIZE < (2ULL << num_pass_bits))
1117 if (region_no != 0) {
1118 if (AXI_REGION_SIZE < (2ULL << num_pass_bits))
1122 aw_offset = (region_no << OB_REG_SIZE_SHIFT);
1124 ob_addr_0 = num_pass_bits & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS;
1125 ob_addr_0 |= lower_addr & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR;
1126 ob_addr_1 = upper_addr;
1127 ob_desc_0 = (1 << 23 | type);
1129 rockchip_pcie_write(rockchip, ob_addr_0,
1130 PCIE_CORE_OB_REGION_ADDR0 + aw_offset);
1131 rockchip_pcie_write(rockchip, ob_addr_1,
1132 PCIE_CORE_OB_REGION_ADDR1 + aw_offset);
1133 rockchip_pcie_write(rockchip, ob_desc_0,
1134 PCIE_CORE_OB_REGION_DESC0 + aw_offset);
1135 rockchip_pcie_write(rockchip, 0,
1136 PCIE_CORE_OB_REGION_DESC1 + aw_offset);
1141 static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
1142 int region_no, u8 num_pass_bits,
1143 u32 lower_addr, u32 upper_addr)
1149 if (region_no > MAX_AXI_IB_ROOTPORT_REGION_NUM)
1151 if (num_pass_bits + 1 < MIN_AXI_ADDR_BITS_PASSED)
1153 if (num_pass_bits > 63)
1156 aw_offset = (region_no << IB_ROOT_PORT_REG_SIZE_SHIFT);
1158 ib_addr_0 = num_pass_bits & PCIE_CORE_IB_REGION_ADDR0_NUM_BITS;
1159 ib_addr_0 |= (lower_addr << 8) & PCIE_CORE_IB_REGION_ADDR0_LO_ADDR;
1160 ib_addr_1 = upper_addr;
1162 rockchip_pcie_write(rockchip, ib_addr_0, PCIE_RP_IB_ADDR0 + aw_offset);
1163 rockchip_pcie_write(rockchip, ib_addr_1, PCIE_RP_IB_ADDR1 + aw_offset);
1168 static int rockchip_cfg_atu(struct rockchip_pcie *rockchip)
1174 for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
1175 err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
1176 AXI_WRAPPER_MEM_WRITE,
1178 rockchip->mem_bus_addr +
1182 dev_err(rockchip->dev,
1183 "program RC mem outbound ATU failed\n");
1188 err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
1190 dev_err(rockchip->dev, "program RC mem inbound ATU failed\n");
1194 offset = rockchip->mem_size >> 20;
1195 for (reg_no = 0; reg_no < (rockchip->io_size >> 20); reg_no++) {
1196 err = rockchip_pcie_prog_ob_atu(rockchip,
1197 reg_no + 1 + offset,
1198 AXI_WRAPPER_IO_WRITE,
1200 rockchip->io_bus_addr +
1204 dev_err(rockchip->dev,
1205 "program RC io outbound ATU failed\n");
1210 /* assign message regions */
1211 rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1 + offset,
1212 AXI_WRAPPER_NOR_MSG,
1215 rockchip->msg_bus_addr = rockchip->mem_bus_addr +
1216 ((reg_no + offset) << 20);
1220 static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip)
1225 /* send PME_TURN_OFF message */
1226 writel(0x0, rockchip->msg_region + PCIE_RC_SEND_PME_OFF);
1228 /* read LTSSM and wait for falling into L2 link state */
1229 err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_DEBUG_OUT_0,
1230 value, PCIE_LINK_IS_L2(value), 20,
1231 jiffies_to_usecs(5 * HZ));
1233 dev_err(rockchip->dev, "PCIe link enter L2 timeout!\n");
1240 static int rockchip_pcie_suspend_noirq(struct device *dev)
1242 struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
1245 /* disable core and cli int since we don't need to ack PME_ACK */
1246 rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) |
1247 PCIE_CLIENT_INT_CLI, PCIE_CLIENT_INT_MASK);
1248 rockchip_pcie_write(rockchip, (u32)PCIE_CORE_INT, PCIE_CORE_INT_MASK);
1250 ret = rockchip_pcie_wait_l2(rockchip);
1252 rockchip_pcie_enable_interrupts(rockchip);
1256 phy_power_off(rockchip->phy);
1257 phy_exit(rockchip->phy);
1259 clk_disable_unprepare(rockchip->clk_pcie_pm);
1260 clk_disable_unprepare(rockchip->hclk_pcie);
1261 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1262 clk_disable_unprepare(rockchip->aclk_pcie);
1267 static int rockchip_pcie_resume_noirq(struct device *dev)
1269 struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
1272 clk_prepare_enable(rockchip->clk_pcie_pm);
1273 clk_prepare_enable(rockchip->hclk_pcie);
1274 clk_prepare_enable(rockchip->aclk_perf_pcie);
1275 clk_prepare_enable(rockchip->aclk_pcie);
1277 err = rockchip_pcie_init_port(rockchip);
1281 err = rockchip_cfg_atu(rockchip);
1285 /* Need this to enter L1 again */
1286 rockchip_pcie_update_txcredit_mui(rockchip);
1287 rockchip_pcie_enable_interrupts(rockchip);
1292 static int rockchip_pcie_probe(struct platform_device *pdev)
1294 struct rockchip_pcie *rockchip;
1295 struct device *dev = &pdev->dev;
1296 struct pci_bus *bus, *child;
1297 struct resource_entry *win;
1298 resource_size_t io_base;
1299 struct resource *mem;
1300 struct resource *io;
1308 rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL);
1312 platform_set_drvdata(pdev, rockchip);
1313 rockchip->dev = dev;
1315 err = rockchip_pcie_parse_dt(rockchip);
1319 err = clk_prepare_enable(rockchip->aclk_pcie);
1321 dev_err(dev, "unable to enable aclk_pcie clock\n");
1325 err = clk_prepare_enable(rockchip->aclk_perf_pcie);
1327 dev_err(dev, "unable to enable aclk_perf_pcie clock\n");
1328 goto err_aclk_perf_pcie;
1331 err = clk_prepare_enable(rockchip->hclk_pcie);
1333 dev_err(dev, "unable to enable hclk_pcie clock\n");
1337 err = clk_prepare_enable(rockchip->clk_pcie_pm);
1339 dev_err(dev, "unable to enable hclk_pcie clock\n");
1343 err = rockchip_pcie_set_vpcie(rockchip);
1345 dev_err(dev, "failed to set vpcie regulator\n");
1349 err = rockchip_pcie_init_port(rockchip);
1353 platform_set_drvdata(pdev, rockchip);
1355 rockchip_pcie_enable_interrupts(rockchip);
1357 err = rockchip_pcie_init_irq_domain(rockchip);
1361 err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
1366 err = devm_request_pci_bus_resources(dev, &res);
1370 /* Get the I/O and memory ranges from DT */
1371 resource_list_for_each_entry(win, &res) {
1372 switch (resource_type(win->res)) {
1376 rockchip->io_size = resource_size(io);
1377 rockchip->io_bus_addr = io->start - win->offset;
1378 err = pci_remap_iospace(io, io_base);
1380 dev_warn(dev, "error %d: failed to map resource %pR\n",
1385 case IORESOURCE_MEM:
1388 rockchip->mem_size = resource_size(mem);
1389 rockchip->mem_bus_addr = mem->start - win->offset;
1391 case IORESOURCE_BUS:
1392 rockchip->root_bus_nr = win->res->start;
1399 err = rockchip_cfg_atu(rockchip);
1403 rockchip->msg_region = devm_ioremap(rockchip->dev,
1404 rockchip->msg_bus_addr, SZ_1M);
1405 if (!rockchip->msg_region) {
1410 bus = pci_scan_root_bus(&pdev->dev, 0, &rockchip_pcie_ops, rockchip, &res);
1416 pci_bus_size_bridges(bus);
1417 pci_bus_assign_resources(bus);
1418 list_for_each_entry(child, &bus->children, node)
1419 pcie_bus_configure_settings(child);
1421 pci_bus_add_devices(bus);
1423 dev_warn(dev, "only 32-bit config accesses supported; smaller writes may corrupt adjacent RW1C fields\n");
1428 if (!IS_ERR(rockchip->vpcie3v3))
1429 regulator_disable(rockchip->vpcie3v3);
1430 if (!IS_ERR(rockchip->vpcie1v8))
1431 regulator_disable(rockchip->vpcie1v8);
1432 if (!IS_ERR(rockchip->vpcie0v9))
1433 regulator_disable(rockchip->vpcie0v9);
1435 clk_disable_unprepare(rockchip->clk_pcie_pm);
1437 clk_disable_unprepare(rockchip->hclk_pcie);
1439 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1441 clk_disable_unprepare(rockchip->aclk_pcie);
1446 static const struct dev_pm_ops rockchip_pcie_pm_ops = {
1447 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq,
1448 rockchip_pcie_resume_noirq)
1451 static const struct of_device_id rockchip_pcie_of_match[] = {
1452 { .compatible = "rockchip,rk3399-pcie", },
1456 static struct platform_driver rockchip_pcie_driver = {
1458 .name = "rockchip-pcie",
1459 .of_match_table = rockchip_pcie_of_match,
1460 .pm = &rockchip_pcie_pm_ops,
1462 .probe = rockchip_pcie_probe,
1465 builtin_platform_driver(rockchip_pcie_driver);