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/module.h>
30 #include <linux/of_address.h>
31 #include <linux/of_device.h>
32 #include <linux/of_pci.h>
33 #include <linux/of_platform.h>
34 #include <linux/of_irq.h>
35 #include <linux/pci.h>
36 #include <linux/pci_ids.h>
37 #include <linux/phy/phy.h>
38 #include <linux/platform_device.h>
39 #include <linux/reset.h>
40 #include <linux/regmap.h>
43 * The upper 16 bits of PCIE_CLIENT_CONFIG are a write mask for the lower 16
44 * bits. This allows atomic updates of the register without locking.
46 #define HIWORD_UPDATE(mask, val) (((mask) << 16) | (val))
47 #define HIWORD_UPDATE_BIT(val) HIWORD_UPDATE(val, val)
49 #define ENCODE_LANES(x) ((((x) >> 1) & 3) << 4)
51 #define PCIE_CLIENT_BASE 0x0
52 #define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
53 #define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001)
54 #define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002)
55 #define PCIE_CLIENT_ARI_ENABLE HIWORD_UPDATE_BIT(0x0008)
56 #define PCIE_CLIENT_CONF_LANE_NUM(x) HIWORD_UPDATE(0x0030, ENCODE_LANES(x))
57 #define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040)
58 #define PCIE_CLIENT_GEN_SEL_1 HIWORD_UPDATE(0x0080, 0)
59 #define PCIE_CLIENT_GEN_SEL_2 HIWORD_UPDATE_BIT(0x0080)
60 #define PCIE_CLIENT_DEBUG_OUT_0 (PCIE_CLIENT_BASE + 0x3c)
61 #define PCIE_CLIENT_DEBUG_LTSSM_MASK GENMASK(5, 0)
62 #define PCIE_CLIENT_DEBUG_LTSSM_L1 0x18
63 #define PCIE_CLIENT_DEBUG_LTSSM_L2 0x19
64 #define PCIE_CLIENT_BASIC_STATUS1 (PCIE_CLIENT_BASE + 0x48)
65 #define PCIE_CLIENT_LINK_STATUS_UP 0x00300000
66 #define PCIE_CLIENT_LINK_STATUS_MASK 0x00300000
67 #define PCIE_CLIENT_INT_MASK (PCIE_CLIENT_BASE + 0x4c)
68 #define PCIE_CLIENT_INT_STATUS (PCIE_CLIENT_BASE + 0x50)
69 #define PCIE_CLIENT_INTR_MASK GENMASK(8, 5)
70 #define PCIE_CLIENT_INTR_SHIFT 5
71 #define PCIE_CLIENT_INT_LEGACY_DONE BIT(15)
72 #define PCIE_CLIENT_INT_MSG BIT(14)
73 #define PCIE_CLIENT_INT_HOT_RST BIT(13)
74 #define PCIE_CLIENT_INT_DPA BIT(12)
75 #define PCIE_CLIENT_INT_FATAL_ERR BIT(11)
76 #define PCIE_CLIENT_INT_NFATAL_ERR BIT(10)
77 #define PCIE_CLIENT_INT_CORR_ERR BIT(9)
78 #define PCIE_CLIENT_INT_INTD BIT(8)
79 #define PCIE_CLIENT_INT_INTC BIT(7)
80 #define PCIE_CLIENT_INT_INTB BIT(6)
81 #define PCIE_CLIENT_INT_INTA BIT(5)
82 #define PCIE_CLIENT_INT_LOCAL BIT(4)
83 #define PCIE_CLIENT_INT_UDMA BIT(3)
84 #define PCIE_CLIENT_INT_PHY BIT(2)
85 #define PCIE_CLIENT_INT_HOT_PLUG BIT(1)
86 #define PCIE_CLIENT_INT_PWR_STCG BIT(0)
88 #define PCIE_CLIENT_INT_LEGACY \
89 (PCIE_CLIENT_INT_INTA | PCIE_CLIENT_INT_INTB | \
90 PCIE_CLIENT_INT_INTC | PCIE_CLIENT_INT_INTD)
92 #define PCIE_CLIENT_INT_CLI \
93 (PCIE_CLIENT_INT_CORR_ERR | PCIE_CLIENT_INT_NFATAL_ERR | \
94 PCIE_CLIENT_INT_FATAL_ERR | PCIE_CLIENT_INT_DPA | \
95 PCIE_CLIENT_INT_HOT_RST | PCIE_CLIENT_INT_MSG | \
96 PCIE_CLIENT_INT_LEGACY_DONE | PCIE_CLIENT_INT_LEGACY | \
99 #define PCIE_CORE_CTRL_MGMT_BASE 0x900000
100 #define PCIE_CORE_CTRL (PCIE_CORE_CTRL_MGMT_BASE + 0x000)
101 #define PCIE_CORE_PL_CONF_SPEED_5G 0x00000008
102 #define PCIE_CORE_PL_CONF_SPEED_MASK 0x00000018
103 #define PCIE_CORE_PL_CONF_LANE_MASK 0x00000006
104 #define PCIE_CORE_PL_CONF_LANE_SHIFT 1
105 #define PCIE_CORE_CTRL_PLC1 (PCIE_CORE_CTRL_MGMT_BASE + 0x004)
106 #define PCIE_CORE_CTRL_PLC1_FTS_MASK GENMASK(23, 8)
107 #define PCIE_CORE_CTRL_PLC1_FTS_SHIFT 8
108 #define PCIE_CORE_CTRL_PLC1_FTS_CNT 0xffff
109 #define PCIE_CORE_TXCREDIT_CFG1 (PCIE_CORE_CTRL_MGMT_BASE + 0x020)
110 #define PCIE_CORE_TXCREDIT_CFG1_MUI_MASK 0xFFFF0000
111 #define PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT 16
112 #define PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(x) \
113 (((x) >> 3) << PCIE_CORE_TXCREDIT_CFG1_MUI_SHIFT)
114 #define PCIE_CORE_INT_STATUS (PCIE_CORE_CTRL_MGMT_BASE + 0x20c)
115 #define PCIE_CORE_INT_PRFPE BIT(0)
116 #define PCIE_CORE_INT_CRFPE BIT(1)
117 #define PCIE_CORE_INT_RRPE BIT(2)
118 #define PCIE_CORE_INT_PRFO BIT(3)
119 #define PCIE_CORE_INT_CRFO BIT(4)
120 #define PCIE_CORE_INT_RT BIT(5)
121 #define PCIE_CORE_INT_RTR BIT(6)
122 #define PCIE_CORE_INT_PE BIT(7)
123 #define PCIE_CORE_INT_MTR BIT(8)
124 #define PCIE_CORE_INT_UCR BIT(9)
125 #define PCIE_CORE_INT_FCE BIT(10)
126 #define PCIE_CORE_INT_CT BIT(11)
127 #define PCIE_CORE_INT_UTC BIT(18)
128 #define PCIE_CORE_INT_MMVC BIT(19)
129 #define PCIE_CORE_CONFIG_VENDOR (PCIE_CORE_CTRL_MGMT_BASE + 0x44)
130 #define PCIE_CORE_INT_MASK (PCIE_CORE_CTRL_MGMT_BASE + 0x210)
131 #define PCIE_RC_BAR_CONF (PCIE_CORE_CTRL_MGMT_BASE + 0x300)
133 #define PCIE_CORE_INT \
134 (PCIE_CORE_INT_PRFPE | PCIE_CORE_INT_CRFPE | \
135 PCIE_CORE_INT_RRPE | PCIE_CORE_INT_CRFO | \
136 PCIE_CORE_INT_RT | PCIE_CORE_INT_RTR | \
137 PCIE_CORE_INT_PE | PCIE_CORE_INT_MTR | \
138 PCIE_CORE_INT_UCR | PCIE_CORE_INT_FCE | \
139 PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
142 #define PCIE_RC_CONFIG_BASE 0xa00000
143 #define PCIE_RC_CONFIG_RID_CCR (PCIE_RC_CONFIG_BASE + 0x08)
144 #define PCIE_RC_CONFIG_SCC_SHIFT 16
145 #define PCIE_RC_CONFIG_DCR (PCIE_RC_CONFIG_BASE + 0xc4)
146 #define PCIE_RC_CONFIG_DCR_CSPL_SHIFT 18
147 #define PCIE_RC_CONFIG_DCR_CSPL_LIMIT 0xff
148 #define PCIE_RC_CONFIG_DCR_CPLS_SHIFT 26
149 #define PCIE_RC_CONFIG_DCSR (PCIE_RC_CONFIG_BASE + 0xc8)
150 #define PCIE_RC_CONFIG_DCSR_MPS_MASK GENMASK(7, 5)
151 #define PCIE_RC_CONFIG_DCSR_MPS_256 (0x1 << 5)
152 #define PCIE_RC_CONFIG_LINK_CAP (PCIE_RC_CONFIG_BASE + 0xcc)
153 #define PCIE_RC_CONFIG_LINK_CAP_L0S BIT(10)
154 #define PCIE_RC_CONFIG_LCS (PCIE_RC_CONFIG_BASE + 0xd0)
155 #define PCIE_RC_CONFIG_L1_SUBSTATE_CTRL2 (PCIE_RC_CONFIG_BASE + 0x90c)
156 #define PCIE_RC_CONFIG_THP_CAP (PCIE_RC_CONFIG_BASE + 0x274)
157 #define PCIE_RC_CONFIG_THP_CAP_NEXT_MASK GENMASK(31, 20)
159 #define PCIE_CORE_AXI_CONF_BASE 0xc00000
160 #define PCIE_CORE_OB_REGION_ADDR0 (PCIE_CORE_AXI_CONF_BASE + 0x0)
161 #define PCIE_CORE_OB_REGION_ADDR0_NUM_BITS 0x3f
162 #define PCIE_CORE_OB_REGION_ADDR0_LO_ADDR 0xffffff00
163 #define PCIE_CORE_OB_REGION_ADDR1 (PCIE_CORE_AXI_CONF_BASE + 0x4)
164 #define PCIE_CORE_OB_REGION_DESC0 (PCIE_CORE_AXI_CONF_BASE + 0x8)
165 #define PCIE_CORE_OB_REGION_DESC1 (PCIE_CORE_AXI_CONF_BASE + 0xc)
167 #define PCIE_CORE_AXI_INBOUND_BASE 0xc00800
168 #define PCIE_RP_IB_ADDR0 (PCIE_CORE_AXI_INBOUND_BASE + 0x0)
169 #define PCIE_CORE_IB_REGION_ADDR0_NUM_BITS 0x3f
170 #define PCIE_CORE_IB_REGION_ADDR0_LO_ADDR 0xffffff00
171 #define PCIE_RP_IB_ADDR1 (PCIE_CORE_AXI_INBOUND_BASE + 0x4)
173 /* Size of one AXI Region (not Region 0) */
174 #define AXI_REGION_SIZE BIT(20)
175 /* Size of Region 0, equal to sum of sizes of other regions */
176 #define AXI_REGION_0_SIZE (32 * (0x1 << 20))
177 #define OB_REG_SIZE_SHIFT 5
178 #define IB_ROOT_PORT_REG_SIZE_SHIFT 3
179 #define AXI_WRAPPER_IO_WRITE 0x6
180 #define AXI_WRAPPER_MEM_WRITE 0x2
181 #define AXI_WRAPPER_TYPE0_CFG 0xa
182 #define AXI_WRAPPER_TYPE1_CFG 0xb
183 #define AXI_WRAPPER_NOR_MSG 0xc
185 #define MAX_AXI_IB_ROOTPORT_REGION_NUM 3
186 #define MIN_AXI_ADDR_BITS_PASSED 8
187 #define PCIE_RC_SEND_PME_OFF 0x11960
188 #define ROCKCHIP_VENDOR_ID 0x1d87
189 #define PCIE_ECAM_BUS(x) (((x) & 0xff) << 20)
190 #define PCIE_ECAM_DEV(x) (((x) & 0x1f) << 15)
191 #define PCIE_ECAM_FUNC(x) (((x) & 0x7) << 12)
192 #define PCIE_ECAM_REG(x) (((x) & 0xfff) << 0)
193 #define PCIE_ECAM_ADDR(bus, dev, func, reg) \
194 (PCIE_ECAM_BUS(bus) | PCIE_ECAM_DEV(dev) | \
195 PCIE_ECAM_FUNC(func) | PCIE_ECAM_REG(reg))
196 #define PCIE_LINK_IS_L2(x) \
197 (((x) & PCIE_CLIENT_DEBUG_LTSSM_MASK) == PCIE_CLIENT_DEBUG_LTSSM_L2)
198 #define PCIE_LINK_UP(x) \
199 (((x) & PCIE_CLIENT_LINK_STATUS_MASK) == PCIE_CLIENT_LINK_STATUS_UP)
200 #define PCIE_LINK_IS_GEN2(x) \
201 (((x) & PCIE_CORE_PL_CONF_SPEED_MASK) == PCIE_CORE_PL_CONF_SPEED_5G)
203 #define RC_REGION_0_ADDR_TRANS_H 0x00000000
204 #define RC_REGION_0_ADDR_TRANS_L 0x00000000
205 #define RC_REGION_0_PASS_BITS (25 - 1)
206 #define RC_REGION_0_TYPE_MASK GENMASK(3, 0)
207 #define MAX_AXI_WRAPPER_REGION_NUM 33
209 struct rockchip_pcie {
210 void __iomem *reg_base; /* DT axi-base */
211 void __iomem *apb_base; /* DT apb-base */
213 struct reset_control *core_rst;
214 struct reset_control *mgmt_rst;
215 struct reset_control *mgmt_sticky_rst;
216 struct reset_control *pipe_rst;
217 struct reset_control *pm_rst;
218 struct reset_control *aclk_rst;
219 struct reset_control *pclk_rst;
220 struct clk *aclk_pcie;
221 struct clk *aclk_perf_pcie;
222 struct clk *hclk_pcie;
223 struct clk *clk_pcie_pm;
224 struct regulator *vpcie3v3; /* 3.3V power supply */
225 struct regulator *vpcie1v8; /* 1.8V power supply */
226 struct regulator *vpcie0v9; /* 0.9V power supply */
227 struct gpio_desc *ep_gpio;
232 struct irq_domain *irq_domain;
234 struct pci_bus *root_bus;
236 phys_addr_t io_bus_addr;
238 void __iomem *msg_region;
240 phys_addr_t msg_bus_addr;
241 phys_addr_t mem_bus_addr;
244 static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
246 return readl(rockchip->apb_base + reg);
249 static void rockchip_pcie_write(struct rockchip_pcie *rockchip, u32 val,
252 writel(val, rockchip->apb_base + reg);
255 static void rockchip_pcie_enable_bw_int(struct rockchip_pcie *rockchip)
259 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
260 status |= (PCI_EXP_LNKCTL_LBMIE | PCI_EXP_LNKCTL_LABIE);
261 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
264 static void rockchip_pcie_clr_bw_int(struct rockchip_pcie *rockchip)
268 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
269 status |= (PCI_EXP_LNKSTA_LBMS | PCI_EXP_LNKSTA_LABS) << 16;
270 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
273 static void rockchip_pcie_update_txcredit_mui(struct rockchip_pcie *rockchip)
277 /* Update Tx credit maximum update interval */
278 val = rockchip_pcie_read(rockchip, PCIE_CORE_TXCREDIT_CFG1);
279 val &= ~PCIE_CORE_TXCREDIT_CFG1_MUI_MASK;
280 val |= PCIE_CORE_TXCREDIT_CFG1_MUI_ENCODE(24000); /* ns */
281 rockchip_pcie_write(rockchip, val, PCIE_CORE_TXCREDIT_CFG1);
284 static int rockchip_pcie_valid_device(struct rockchip_pcie *rockchip,
285 struct pci_bus *bus, int dev)
287 /* access only one slot on each root port */
288 if (bus->number == rockchip->root_bus_nr && dev > 0)
292 * do not read more than one device on the bus directly attached
293 * to RC's downstream side.
295 if (bus->primary == rockchip->root_bus_nr && dev > 0)
301 static int rockchip_pcie_rd_own_conf(struct rockchip_pcie *rockchip,
302 int where, int size, u32 *val)
304 void __iomem *addr = rockchip->apb_base + PCIE_RC_CONFIG_BASE + where;
306 if (!IS_ALIGNED((uintptr_t)addr, size)) {
308 return PCIBIOS_BAD_REGISTER_NUMBER;
313 } else if (size == 2) {
315 } else if (size == 1) {
319 return PCIBIOS_BAD_REGISTER_NUMBER;
321 return PCIBIOS_SUCCESSFUL;
324 static int rockchip_pcie_wr_own_conf(struct rockchip_pcie *rockchip,
325 int where, int size, u32 val)
327 u32 mask, tmp, offset;
329 offset = where & ~0x3;
332 writel(val, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
333 return PCIBIOS_SUCCESSFUL;
336 mask = ~(((1 << (size * 8)) - 1) << ((where & 0x3) * 8));
339 * N.B. This read/modify/write isn't safe in general because it can
340 * corrupt RW1C bits in adjacent registers. But the hardware
341 * doesn't support smaller writes.
343 tmp = readl(rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset) & mask;
344 tmp |= val << ((where & 0x3) * 8);
345 writel(tmp, rockchip->apb_base + PCIE_RC_CONFIG_BASE + offset);
347 return PCIBIOS_SUCCESSFUL;
350 static void rockchip_pcie_cfg_configuration_accesses(
351 struct rockchip_pcie *rockchip, u32 type)
355 /* Configuration Accesses for region 0 */
356 rockchip_pcie_write(rockchip, 0x0, PCIE_RC_BAR_CONF);
358 rockchip_pcie_write(rockchip,
359 (RC_REGION_0_ADDR_TRANS_L + RC_REGION_0_PASS_BITS),
360 PCIE_CORE_OB_REGION_ADDR0);
361 rockchip_pcie_write(rockchip, RC_REGION_0_ADDR_TRANS_H,
362 PCIE_CORE_OB_REGION_ADDR1);
363 ob_desc_0 = rockchip_pcie_read(rockchip, PCIE_CORE_OB_REGION_DESC0);
364 ob_desc_0 &= ~(RC_REGION_0_TYPE_MASK);
365 ob_desc_0 |= (type | (0x1 << 23));
366 rockchip_pcie_write(rockchip, ob_desc_0, PCIE_CORE_OB_REGION_DESC0);
367 rockchip_pcie_write(rockchip, 0x0, PCIE_CORE_OB_REGION_DESC1);
370 static int rockchip_pcie_rd_other_conf(struct rockchip_pcie *rockchip,
371 struct pci_bus *bus, u32 devfn,
372 int where, int size, u32 *val)
376 busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
377 PCI_FUNC(devfn), where);
379 if (!IS_ALIGNED(busdev, size)) {
381 return PCIBIOS_BAD_REGISTER_NUMBER;
384 if (bus->parent->number == rockchip->root_bus_nr)
385 rockchip_pcie_cfg_configuration_accesses(rockchip,
386 AXI_WRAPPER_TYPE0_CFG);
388 rockchip_pcie_cfg_configuration_accesses(rockchip,
389 AXI_WRAPPER_TYPE1_CFG);
392 *val = readl(rockchip->reg_base + busdev);
393 } else if (size == 2) {
394 *val = readw(rockchip->reg_base + busdev);
395 } else if (size == 1) {
396 *val = readb(rockchip->reg_base + busdev);
399 return PCIBIOS_BAD_REGISTER_NUMBER;
401 return PCIBIOS_SUCCESSFUL;
404 static int rockchip_pcie_wr_other_conf(struct rockchip_pcie *rockchip,
405 struct pci_bus *bus, u32 devfn,
406 int where, int size, u32 val)
410 busdev = PCIE_ECAM_ADDR(bus->number, PCI_SLOT(devfn),
411 PCI_FUNC(devfn), where);
412 if (!IS_ALIGNED(busdev, size))
413 return PCIBIOS_BAD_REGISTER_NUMBER;
415 if (bus->parent->number == rockchip->root_bus_nr)
416 rockchip_pcie_cfg_configuration_accesses(rockchip,
417 AXI_WRAPPER_TYPE0_CFG);
419 rockchip_pcie_cfg_configuration_accesses(rockchip,
420 AXI_WRAPPER_TYPE1_CFG);
423 writel(val, rockchip->reg_base + busdev);
425 writew(val, rockchip->reg_base + busdev);
427 writeb(val, rockchip->reg_base + busdev);
429 return PCIBIOS_BAD_REGISTER_NUMBER;
431 return PCIBIOS_SUCCESSFUL;
434 static int rockchip_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
437 struct rockchip_pcie *rockchip = bus->sysdata;
439 if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn))) {
441 return PCIBIOS_DEVICE_NOT_FOUND;
444 if (bus->number == rockchip->root_bus_nr)
445 return rockchip_pcie_rd_own_conf(rockchip, where, size, val);
447 return rockchip_pcie_rd_other_conf(rockchip, bus, devfn, where, size, val);
450 static int rockchip_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
451 int where, int size, u32 val)
453 struct rockchip_pcie *rockchip = bus->sysdata;
455 if (!rockchip_pcie_valid_device(rockchip, bus, PCI_SLOT(devfn)))
456 return PCIBIOS_DEVICE_NOT_FOUND;
458 if (bus->number == rockchip->root_bus_nr)
459 return rockchip_pcie_wr_own_conf(rockchip, where, size, val);
461 return rockchip_pcie_wr_other_conf(rockchip, bus, devfn, where, size, val);
464 static struct pci_ops rockchip_pcie_ops = {
465 .read = rockchip_pcie_rd_conf,
466 .write = rockchip_pcie_wr_conf,
469 static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
472 u32 status, scale, power;
474 if (IS_ERR(rockchip->vpcie3v3))
478 * Set RC's captured slot power limit and scale if
479 * vpcie3v3 available. The default values are both zero
480 * which means the software should set these two according
481 * to the actual power supply.
483 curr = regulator_get_current_limit(rockchip->vpcie3v3);
487 scale = 3; /* 0.001x */
488 curr = curr / 1000; /* convert to mA */
489 power = (curr * 3300) / 1000; /* milliwatt */
490 while (power > PCIE_RC_CONFIG_DCR_CSPL_LIMIT) {
492 dev_warn(rockchip->dev, "invalid power supply\n");
499 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCR);
500 status |= (power << PCIE_RC_CONFIG_DCR_CSPL_SHIFT) |
501 (scale << PCIE_RC_CONFIG_DCR_CPLS_SHIFT);
502 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCR);
506 * rockchip_pcie_init_port - Initialize hardware
507 * @rockchip: PCIe port information
509 static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
511 struct device *dev = rockchip->dev;
515 gpiod_set_value(rockchip->ep_gpio, 0);
517 err = reset_control_assert(rockchip->aclk_rst);
519 dev_err(dev, "assert aclk_rst err %d\n", err);
523 err = reset_control_assert(rockchip->pclk_rst);
525 dev_err(dev, "assert pclk_rst err %d\n", err);
529 err = reset_control_assert(rockchip->pm_rst);
531 dev_err(dev, "assert pm_rst err %d\n", err);
535 err = phy_init(rockchip->phy);
537 dev_err(dev, "fail to init phy, err %d\n", err);
541 err = reset_control_assert(rockchip->core_rst);
543 dev_err(dev, "assert core_rst err %d\n", err);
547 err = reset_control_assert(rockchip->mgmt_rst);
549 dev_err(dev, "assert mgmt_rst err %d\n", err);
553 err = reset_control_assert(rockchip->mgmt_sticky_rst);
555 dev_err(dev, "assert mgmt_sticky_rst err %d\n", err);
559 err = reset_control_assert(rockchip->pipe_rst);
561 dev_err(dev, "assert pipe_rst err %d\n", err);
567 err = reset_control_deassert(rockchip->pm_rst);
569 dev_err(dev, "deassert pm_rst err %d\n", err);
573 err = reset_control_deassert(rockchip->aclk_rst);
575 dev_err(dev, "deassert aclk_rst err %d\n", err);
579 err = reset_control_deassert(rockchip->pclk_rst);
581 dev_err(dev, "deassert pclk_rst err %d\n", err);
585 if (rockchip->link_gen == 2)
586 rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_2,
589 rockchip_pcie_write(rockchip, PCIE_CLIENT_GEN_SEL_1,
592 rockchip_pcie_write(rockchip,
593 PCIE_CLIENT_CONF_ENABLE |
594 PCIE_CLIENT_LINK_TRAIN_ENABLE |
595 PCIE_CLIENT_ARI_ENABLE |
596 PCIE_CLIENT_CONF_LANE_NUM(rockchip->lanes) |
600 err = phy_power_on(rockchip->phy);
602 dev_err(dev, "fail to power on phy, err %d\n", err);
607 * Please don't reorder the deassert sequence of the following
610 err = reset_control_deassert(rockchip->mgmt_sticky_rst);
612 dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
616 err = reset_control_deassert(rockchip->core_rst);
618 dev_err(dev, "deassert core_rst err %d\n", err);
622 err = reset_control_deassert(rockchip->mgmt_rst);
624 dev_err(dev, "deassert mgmt_rst err %d\n", err);
628 err = reset_control_deassert(rockchip->pipe_rst);
630 dev_err(dev, "deassert pipe_rst err %d\n", err);
634 /* Fix the transmitted FTS count desired to exit from L0s. */
635 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL_PLC1);
636 status = (status & ~PCIE_CORE_CTRL_PLC1_FTS_MASK) |
637 (PCIE_CORE_CTRL_PLC1_FTS_CNT << PCIE_CORE_CTRL_PLC1_FTS_SHIFT);
638 rockchip_pcie_write(rockchip, status, PCIE_CORE_CTRL_PLC1);
640 rockchip_pcie_set_power_limit(rockchip);
642 /* Set RC's clock architecture as common clock */
643 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
644 status |= PCI_EXP_LNKSTA_SLC << 16;
645 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
647 /* Set RC's RCB to 128 */
648 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
649 status |= PCI_EXP_LNKCTL_RCB;
650 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
652 /* Enable Gen1 training */
653 rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
656 gpiod_set_value(rockchip->ep_gpio, 1);
658 /* 500ms timeout value should be enough for Gen1/2 training */
659 err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_BASIC_STATUS1,
660 status, PCIE_LINK_UP(status), 20,
661 500 * USEC_PER_MSEC);
663 dev_err(dev, "PCIe link training gen1 timeout!\n");
667 if (rockchip->link_gen == 2) {
669 * Enable retrain for gen2. This should be configured only after
672 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LCS);
673 status |= PCI_EXP_LNKCTL_RL;
674 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LCS);
676 err = readl_poll_timeout(rockchip->apb_base + PCIE_CORE_CTRL,
677 status, PCIE_LINK_IS_GEN2(status), 20,
678 500 * USEC_PER_MSEC);
680 dev_dbg(dev, "PCIe link training gen2 timeout, fall back to gen1!\n");
683 /* Check the final link width from negotiated lane counter from MGMT */
684 status = rockchip_pcie_read(rockchip, PCIE_CORE_CTRL);
685 status = 0x1 << ((status & PCIE_CORE_PL_CONF_LANE_MASK) >>
686 PCIE_CORE_PL_CONF_LANE_SHIFT);
687 dev_dbg(dev, "current link width is x%d\n", status);
689 rockchip_pcie_write(rockchip, ROCKCHIP_VENDOR_ID,
690 PCIE_CORE_CONFIG_VENDOR);
691 rockchip_pcie_write(rockchip,
692 PCI_CLASS_BRIDGE_PCI << PCIE_RC_CONFIG_SCC_SHIFT,
693 PCIE_RC_CONFIG_RID_CCR);
695 /* Clear THP cap's next cap pointer to remove L1 substate cap */
696 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_THP_CAP);
697 status &= ~PCIE_RC_CONFIG_THP_CAP_NEXT_MASK;
698 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_THP_CAP);
700 /* Clear L0s from RC's link cap */
701 if (of_property_read_bool(dev->of_node, "aspm-no-l0s")) {
702 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_LINK_CAP);
703 status &= ~PCIE_RC_CONFIG_LINK_CAP_L0S;
704 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_LINK_CAP);
707 status = rockchip_pcie_read(rockchip, PCIE_RC_CONFIG_DCSR);
708 status &= ~PCIE_RC_CONFIG_DCSR_MPS_MASK;
709 status |= PCIE_RC_CONFIG_DCSR_MPS_256;
710 rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR);
715 static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
717 struct rockchip_pcie *rockchip = arg;
718 struct device *dev = rockchip->dev;
722 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
723 if (reg & PCIE_CLIENT_INT_LOCAL) {
724 dev_dbg(dev, "local interrupt received\n");
725 sub_reg = rockchip_pcie_read(rockchip, PCIE_CORE_INT_STATUS);
726 if (sub_reg & PCIE_CORE_INT_PRFPE)
727 dev_dbg(dev, "parity error detected while reading from the PNP receive FIFO RAM\n");
729 if (sub_reg & PCIE_CORE_INT_CRFPE)
730 dev_dbg(dev, "parity error detected while reading from the Completion Receive FIFO RAM\n");
732 if (sub_reg & PCIE_CORE_INT_RRPE)
733 dev_dbg(dev, "parity error detected while reading from replay buffer RAM\n");
735 if (sub_reg & PCIE_CORE_INT_PRFO)
736 dev_dbg(dev, "overflow occurred in the PNP receive FIFO\n");
738 if (sub_reg & PCIE_CORE_INT_CRFO)
739 dev_dbg(dev, "overflow occurred in the completion receive FIFO\n");
741 if (sub_reg & PCIE_CORE_INT_RT)
742 dev_dbg(dev, "replay timer timed out\n");
744 if (sub_reg & PCIE_CORE_INT_RTR)
745 dev_dbg(dev, "replay timer rolled over after 4 transmissions of the same TLP\n");
747 if (sub_reg & PCIE_CORE_INT_PE)
748 dev_dbg(dev, "phy error detected on receive side\n");
750 if (sub_reg & PCIE_CORE_INT_MTR)
751 dev_dbg(dev, "malformed TLP received from the link\n");
753 if (sub_reg & PCIE_CORE_INT_UCR)
754 dev_dbg(dev, "malformed TLP received from the link\n");
756 if (sub_reg & PCIE_CORE_INT_FCE)
757 dev_dbg(dev, "an error was observed in the flow control advertisements from the other side\n");
759 if (sub_reg & PCIE_CORE_INT_CT)
760 dev_dbg(dev, "a request timed out waiting for completion\n");
762 if (sub_reg & PCIE_CORE_INT_UTC)
763 dev_dbg(dev, "unmapped TC error\n");
765 if (sub_reg & PCIE_CORE_INT_MMVC)
766 dev_dbg(dev, "MSI mask register changes\n");
768 rockchip_pcie_write(rockchip, sub_reg, PCIE_CORE_INT_STATUS);
769 } else if (reg & PCIE_CLIENT_INT_PHY) {
770 dev_dbg(dev, "phy link changes\n");
771 rockchip_pcie_update_txcredit_mui(rockchip);
772 rockchip_pcie_clr_bw_int(rockchip);
775 rockchip_pcie_write(rockchip, reg & PCIE_CLIENT_INT_LOCAL,
776 PCIE_CLIENT_INT_STATUS);
781 static irqreturn_t rockchip_pcie_client_irq_handler(int irq, void *arg)
783 struct rockchip_pcie *rockchip = arg;
784 struct device *dev = rockchip->dev;
787 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
788 if (reg & PCIE_CLIENT_INT_LEGACY_DONE)
789 dev_dbg(dev, "legacy done interrupt received\n");
791 if (reg & PCIE_CLIENT_INT_MSG)
792 dev_dbg(dev, "message done interrupt received\n");
794 if (reg & PCIE_CLIENT_INT_HOT_RST)
795 dev_dbg(dev, "hot reset interrupt received\n");
797 if (reg & PCIE_CLIENT_INT_DPA)
798 dev_dbg(dev, "dpa interrupt received\n");
800 if (reg & PCIE_CLIENT_INT_FATAL_ERR)
801 dev_dbg(dev, "fatal error interrupt received\n");
803 if (reg & PCIE_CLIENT_INT_NFATAL_ERR)
804 dev_dbg(dev, "no fatal error interrupt received\n");
806 if (reg & PCIE_CLIENT_INT_CORR_ERR)
807 dev_dbg(dev, "correctable error interrupt received\n");
809 if (reg & PCIE_CLIENT_INT_PHY)
810 dev_dbg(dev, "phy interrupt received\n");
812 rockchip_pcie_write(rockchip, reg & (PCIE_CLIENT_INT_LEGACY_DONE |
813 PCIE_CLIENT_INT_MSG | PCIE_CLIENT_INT_HOT_RST |
814 PCIE_CLIENT_INT_DPA | PCIE_CLIENT_INT_FATAL_ERR |
815 PCIE_CLIENT_INT_NFATAL_ERR |
816 PCIE_CLIENT_INT_CORR_ERR |
817 PCIE_CLIENT_INT_PHY),
818 PCIE_CLIENT_INT_STATUS);
823 static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
825 struct irq_chip *chip = irq_desc_get_chip(desc);
826 struct rockchip_pcie *rockchip = irq_desc_get_handler_data(desc);
827 struct device *dev = rockchip->dev;
832 chained_irq_enter(chip, desc);
834 reg = rockchip_pcie_read(rockchip, PCIE_CLIENT_INT_STATUS);
835 reg = (reg & PCIE_CLIENT_INTR_MASK) >> PCIE_CLIENT_INTR_SHIFT;
838 hwirq = ffs(reg) - 1;
841 virq = irq_find_mapping(rockchip->irq_domain, hwirq);
843 generic_handle_irq(virq);
845 dev_err(dev, "unexpected IRQ, INT%d\n", hwirq);
848 chained_irq_exit(chip, desc);
853 * rockchip_pcie_parse_dt - Parse Device Tree
854 * @rockchip: PCIe port information
856 * Return: '0' on success and error value on failure
858 static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
860 struct device *dev = rockchip->dev;
861 struct platform_device *pdev = to_platform_device(dev);
862 struct device_node *node = dev->of_node;
863 struct resource *regs;
867 regs = platform_get_resource_byname(pdev,
870 rockchip->reg_base = devm_pci_remap_cfg_resource(dev, regs);
871 if (IS_ERR(rockchip->reg_base))
872 return PTR_ERR(rockchip->reg_base);
874 regs = platform_get_resource_byname(pdev,
877 rockchip->apb_base = devm_ioremap_resource(dev, regs);
878 if (IS_ERR(rockchip->apb_base))
879 return PTR_ERR(rockchip->apb_base);
881 rockchip->phy = devm_phy_get(dev, "pcie-phy");
882 if (IS_ERR(rockchip->phy)) {
883 if (PTR_ERR(rockchip->phy) != -EPROBE_DEFER)
884 dev_err(dev, "missing phy\n");
885 return PTR_ERR(rockchip->phy);
889 err = of_property_read_u32(node, "num-lanes", &rockchip->lanes);
890 if (!err && (rockchip->lanes == 0 ||
891 rockchip->lanes == 3 ||
892 rockchip->lanes > 4)) {
893 dev_warn(dev, "invalid num-lanes, default to use one lane\n");
897 rockchip->link_gen = of_pci_get_max_link_speed(node);
898 if (rockchip->link_gen < 0 || rockchip->link_gen > 2)
899 rockchip->link_gen = 2;
901 rockchip->core_rst = devm_reset_control_get(dev, "core");
902 if (IS_ERR(rockchip->core_rst)) {
903 if (PTR_ERR(rockchip->core_rst) != -EPROBE_DEFER)
904 dev_err(dev, "missing core reset property in node\n");
905 return PTR_ERR(rockchip->core_rst);
908 rockchip->mgmt_rst = devm_reset_control_get(dev, "mgmt");
909 if (IS_ERR(rockchip->mgmt_rst)) {
910 if (PTR_ERR(rockchip->mgmt_rst) != -EPROBE_DEFER)
911 dev_err(dev, "missing mgmt reset property in node\n");
912 return PTR_ERR(rockchip->mgmt_rst);
915 rockchip->mgmt_sticky_rst = devm_reset_control_get(dev, "mgmt-sticky");
916 if (IS_ERR(rockchip->mgmt_sticky_rst)) {
917 if (PTR_ERR(rockchip->mgmt_sticky_rst) != -EPROBE_DEFER)
918 dev_err(dev, "missing mgmt-sticky reset property in node\n");
919 return PTR_ERR(rockchip->mgmt_sticky_rst);
922 rockchip->pipe_rst = devm_reset_control_get(dev, "pipe");
923 if (IS_ERR(rockchip->pipe_rst)) {
924 if (PTR_ERR(rockchip->pipe_rst) != -EPROBE_DEFER)
925 dev_err(dev, "missing pipe reset property in node\n");
926 return PTR_ERR(rockchip->pipe_rst);
929 rockchip->pm_rst = devm_reset_control_get(dev, "pm");
930 if (IS_ERR(rockchip->pm_rst)) {
931 if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
932 dev_err(dev, "missing pm reset property in node\n");
933 return PTR_ERR(rockchip->pm_rst);
936 rockchip->pclk_rst = devm_reset_control_get(dev, "pclk");
937 if (IS_ERR(rockchip->pclk_rst)) {
938 if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
939 dev_err(dev, "missing pclk reset property in node\n");
940 return PTR_ERR(rockchip->pclk_rst);
943 rockchip->aclk_rst = devm_reset_control_get(dev, "aclk");
944 if (IS_ERR(rockchip->aclk_rst)) {
945 if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
946 dev_err(dev, "missing aclk reset property in node\n");
947 return PTR_ERR(rockchip->aclk_rst);
950 rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
951 if (IS_ERR(rockchip->ep_gpio)) {
952 dev_err(dev, "missing ep-gpios property in node\n");
953 return PTR_ERR(rockchip->ep_gpio);
956 rockchip->aclk_pcie = devm_clk_get(dev, "aclk");
957 if (IS_ERR(rockchip->aclk_pcie)) {
958 dev_err(dev, "aclk clock not found\n");
959 return PTR_ERR(rockchip->aclk_pcie);
962 rockchip->aclk_perf_pcie = devm_clk_get(dev, "aclk-perf");
963 if (IS_ERR(rockchip->aclk_perf_pcie)) {
964 dev_err(dev, "aclk_perf clock not found\n");
965 return PTR_ERR(rockchip->aclk_perf_pcie);
968 rockchip->hclk_pcie = devm_clk_get(dev, "hclk");
969 if (IS_ERR(rockchip->hclk_pcie)) {
970 dev_err(dev, "hclk clock not found\n");
971 return PTR_ERR(rockchip->hclk_pcie);
974 rockchip->clk_pcie_pm = devm_clk_get(dev, "pm");
975 if (IS_ERR(rockchip->clk_pcie_pm)) {
976 dev_err(dev, "pm clock not found\n");
977 return PTR_ERR(rockchip->clk_pcie_pm);
980 irq = platform_get_irq_byname(pdev, "sys");
982 dev_err(dev, "missing sys IRQ resource\n");
986 err = devm_request_irq(dev, irq, rockchip_pcie_subsys_irq_handler,
987 IRQF_SHARED, "pcie-sys", rockchip);
989 dev_err(dev, "failed to request PCIe subsystem IRQ\n");
993 irq = platform_get_irq_byname(pdev, "legacy");
995 dev_err(dev, "missing legacy IRQ resource\n");
999 irq_set_chained_handler_and_data(irq,
1000 rockchip_pcie_legacy_int_handler,
1003 irq = platform_get_irq_byname(pdev, "client");
1005 dev_err(dev, "missing client IRQ resource\n");
1009 err = devm_request_irq(dev, irq, rockchip_pcie_client_irq_handler,
1010 IRQF_SHARED, "pcie-client", rockchip);
1012 dev_err(dev, "failed to request PCIe client IRQ\n");
1016 rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3");
1017 if (IS_ERR(rockchip->vpcie3v3)) {
1018 if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER)
1019 return -EPROBE_DEFER;
1020 dev_info(dev, "no vpcie3v3 regulator found\n");
1023 rockchip->vpcie1v8 = devm_regulator_get_optional(dev, "vpcie1v8");
1024 if (IS_ERR(rockchip->vpcie1v8)) {
1025 if (PTR_ERR(rockchip->vpcie1v8) == -EPROBE_DEFER)
1026 return -EPROBE_DEFER;
1027 dev_info(dev, "no vpcie1v8 regulator found\n");
1030 rockchip->vpcie0v9 = devm_regulator_get_optional(dev, "vpcie0v9");
1031 if (IS_ERR(rockchip->vpcie0v9)) {
1032 if (PTR_ERR(rockchip->vpcie0v9) == -EPROBE_DEFER)
1033 return -EPROBE_DEFER;
1034 dev_info(dev, "no vpcie0v9 regulator found\n");
1040 static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip)
1042 struct device *dev = rockchip->dev;
1045 if (!IS_ERR(rockchip->vpcie3v3)) {
1046 err = regulator_enable(rockchip->vpcie3v3);
1048 dev_err(dev, "fail to enable vpcie3v3 regulator\n");
1053 if (!IS_ERR(rockchip->vpcie1v8)) {
1054 err = regulator_enable(rockchip->vpcie1v8);
1056 dev_err(dev, "fail to enable vpcie1v8 regulator\n");
1057 goto err_disable_3v3;
1061 if (!IS_ERR(rockchip->vpcie0v9)) {
1062 err = regulator_enable(rockchip->vpcie0v9);
1064 dev_err(dev, "fail to enable vpcie0v9 regulator\n");
1065 goto err_disable_1v8;
1072 if (!IS_ERR(rockchip->vpcie1v8))
1073 regulator_disable(rockchip->vpcie1v8);
1075 if (!IS_ERR(rockchip->vpcie3v3))
1076 regulator_disable(rockchip->vpcie3v3);
1081 static void rockchip_pcie_enable_interrupts(struct rockchip_pcie *rockchip)
1083 rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) &
1084 (~PCIE_CLIENT_INT_CLI), PCIE_CLIENT_INT_MASK);
1085 rockchip_pcie_write(rockchip, (u32)(~PCIE_CORE_INT),
1086 PCIE_CORE_INT_MASK);
1088 rockchip_pcie_enable_bw_int(rockchip);
1091 static int rockchip_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
1092 irq_hw_number_t hwirq)
1094 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
1095 irq_set_chip_data(irq, domain->host_data);
1100 static const struct irq_domain_ops intx_domain_ops = {
1101 .map = rockchip_pcie_intx_map,
1104 static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
1106 struct device *dev = rockchip->dev;
1107 struct device_node *intc = of_get_next_child(dev->of_node, NULL);
1110 dev_err(dev, "missing child interrupt-controller node\n");
1114 rockchip->irq_domain = irq_domain_add_linear(intc, 4,
1115 &intx_domain_ops, rockchip);
1116 if (!rockchip->irq_domain) {
1117 dev_err(dev, "failed to get a INTx IRQ domain\n");
1124 static int rockchip_pcie_prog_ob_atu(struct rockchip_pcie *rockchip,
1125 int region_no, int type, u8 num_pass_bits,
1126 u32 lower_addr, u32 upper_addr)
1133 if (region_no >= MAX_AXI_WRAPPER_REGION_NUM)
1135 if (num_pass_bits + 1 < 8)
1137 if (num_pass_bits > 63)
1139 if (region_no == 0) {
1140 if (AXI_REGION_0_SIZE < (2ULL << num_pass_bits))
1143 if (region_no != 0) {
1144 if (AXI_REGION_SIZE < (2ULL << num_pass_bits))
1148 aw_offset = (region_no << OB_REG_SIZE_SHIFT);
1150 ob_addr_0 = num_pass_bits & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS;
1151 ob_addr_0 |= lower_addr & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR;
1152 ob_addr_1 = upper_addr;
1153 ob_desc_0 = (1 << 23 | type);
1155 rockchip_pcie_write(rockchip, ob_addr_0,
1156 PCIE_CORE_OB_REGION_ADDR0 + aw_offset);
1157 rockchip_pcie_write(rockchip, ob_addr_1,
1158 PCIE_CORE_OB_REGION_ADDR1 + aw_offset);
1159 rockchip_pcie_write(rockchip, ob_desc_0,
1160 PCIE_CORE_OB_REGION_DESC0 + aw_offset);
1161 rockchip_pcie_write(rockchip, 0,
1162 PCIE_CORE_OB_REGION_DESC1 + aw_offset);
1167 static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
1168 int region_no, u8 num_pass_bits,
1169 u32 lower_addr, u32 upper_addr)
1175 if (region_no > MAX_AXI_IB_ROOTPORT_REGION_NUM)
1177 if (num_pass_bits + 1 < MIN_AXI_ADDR_BITS_PASSED)
1179 if (num_pass_bits > 63)
1182 aw_offset = (region_no << IB_ROOT_PORT_REG_SIZE_SHIFT);
1184 ib_addr_0 = num_pass_bits & PCIE_CORE_IB_REGION_ADDR0_NUM_BITS;
1185 ib_addr_0 |= (lower_addr << 8) & PCIE_CORE_IB_REGION_ADDR0_LO_ADDR;
1186 ib_addr_1 = upper_addr;
1188 rockchip_pcie_write(rockchip, ib_addr_0, PCIE_RP_IB_ADDR0 + aw_offset);
1189 rockchip_pcie_write(rockchip, ib_addr_1, PCIE_RP_IB_ADDR1 + aw_offset);
1194 static int rockchip_pcie_cfg_atu(struct rockchip_pcie *rockchip)
1196 struct device *dev = rockchip->dev;
1201 rockchip_pcie_cfg_configuration_accesses(rockchip,
1202 AXI_WRAPPER_TYPE0_CFG);
1204 for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
1205 err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
1206 AXI_WRAPPER_MEM_WRITE,
1208 rockchip->mem_bus_addr +
1212 dev_err(dev, "program RC mem outbound ATU failed\n");
1217 err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
1219 dev_err(dev, "program RC mem inbound ATU failed\n");
1223 offset = rockchip->mem_size >> 20;
1224 for (reg_no = 0; reg_no < (rockchip->io_size >> 20); reg_no++) {
1225 err = rockchip_pcie_prog_ob_atu(rockchip,
1226 reg_no + 1 + offset,
1227 AXI_WRAPPER_IO_WRITE,
1229 rockchip->io_bus_addr +
1233 dev_err(dev, "program RC io outbound ATU failed\n");
1238 /* assign message regions */
1239 rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1 + offset,
1240 AXI_WRAPPER_NOR_MSG,
1243 rockchip->msg_bus_addr = rockchip->mem_bus_addr +
1244 ((reg_no + offset) << 20);
1248 static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip)
1253 /* send PME_TURN_OFF message */
1254 writel(0x0, rockchip->msg_region + PCIE_RC_SEND_PME_OFF);
1256 /* read LTSSM and wait for falling into L2 link state */
1257 err = readl_poll_timeout(rockchip->apb_base + PCIE_CLIENT_DEBUG_OUT_0,
1258 value, PCIE_LINK_IS_L2(value), 20,
1259 jiffies_to_usecs(5 * HZ));
1261 dev_err(rockchip->dev, "PCIe link enter L2 timeout!\n");
1268 static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
1270 struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
1273 /* disable core and cli int since we don't need to ack PME_ACK */
1274 rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) |
1275 PCIE_CLIENT_INT_CLI, PCIE_CLIENT_INT_MASK);
1276 rockchip_pcie_write(rockchip, (u32)PCIE_CORE_INT, PCIE_CORE_INT_MASK);
1278 ret = rockchip_pcie_wait_l2(rockchip);
1280 rockchip_pcie_enable_interrupts(rockchip);
1284 phy_power_off(rockchip->phy);
1285 phy_exit(rockchip->phy);
1287 clk_disable_unprepare(rockchip->clk_pcie_pm);
1288 clk_disable_unprepare(rockchip->hclk_pcie);
1289 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1290 clk_disable_unprepare(rockchip->aclk_pcie);
1292 if (!IS_ERR(rockchip->vpcie0v9))
1293 regulator_disable(rockchip->vpcie0v9);
1298 static int __maybe_unused rockchip_pcie_resume_noirq(struct device *dev)
1300 struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
1303 if (!IS_ERR(rockchip->vpcie0v9)) {
1304 err = regulator_enable(rockchip->vpcie0v9);
1306 dev_err(dev, "fail to enable vpcie0v9 regulator\n");
1311 err = clk_prepare_enable(rockchip->clk_pcie_pm);
1315 err = clk_prepare_enable(rockchip->hclk_pcie);
1319 err = clk_prepare_enable(rockchip->aclk_perf_pcie);
1321 goto err_aclk_perf_pcie;
1323 err = clk_prepare_enable(rockchip->aclk_pcie);
1327 err = rockchip_pcie_init_port(rockchip);
1329 goto err_pcie_resume;
1331 err = rockchip_pcie_cfg_atu(rockchip);
1333 goto err_pcie_resume;
1335 /* Need this to enter L1 again */
1336 rockchip_pcie_update_txcredit_mui(rockchip);
1337 rockchip_pcie_enable_interrupts(rockchip);
1342 clk_disable_unprepare(rockchip->aclk_pcie);
1344 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1346 clk_disable_unprepare(rockchip->hclk_pcie);
1348 clk_disable_unprepare(rockchip->clk_pcie_pm);
1353 static int rockchip_pcie_probe(struct platform_device *pdev)
1355 struct rockchip_pcie *rockchip;
1356 struct device *dev = &pdev->dev;
1357 struct pci_bus *bus, *child;
1358 struct pci_host_bridge *bridge;
1359 struct resource_entry *win;
1360 resource_size_t io_base;
1361 struct resource *mem;
1362 struct resource *io;
1370 bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rockchip));
1374 rockchip = pci_host_bridge_priv(bridge);
1376 platform_set_drvdata(pdev, rockchip);
1377 rockchip->dev = dev;
1379 err = rockchip_pcie_parse_dt(rockchip);
1383 err = clk_prepare_enable(rockchip->aclk_pcie);
1385 dev_err(dev, "unable to enable aclk_pcie clock\n");
1389 err = clk_prepare_enable(rockchip->aclk_perf_pcie);
1391 dev_err(dev, "unable to enable aclk_perf_pcie clock\n");
1392 goto err_aclk_perf_pcie;
1395 err = clk_prepare_enable(rockchip->hclk_pcie);
1397 dev_err(dev, "unable to enable hclk_pcie clock\n");
1401 err = clk_prepare_enable(rockchip->clk_pcie_pm);
1403 dev_err(dev, "unable to enable hclk_pcie clock\n");
1407 err = rockchip_pcie_set_vpcie(rockchip);
1409 dev_err(dev, "failed to set vpcie regulator\n");
1413 err = rockchip_pcie_init_port(rockchip);
1417 rockchip_pcie_enable_interrupts(rockchip);
1419 err = rockchip_pcie_init_irq_domain(rockchip);
1423 err = of_pci_get_host_bridge_resources(dev->of_node, 0, 0xff,
1428 err = devm_request_pci_bus_resources(dev, &res);
1432 /* Get the I/O and memory ranges from DT */
1433 resource_list_for_each_entry(win, &res) {
1434 switch (resource_type(win->res)) {
1438 rockchip->io_size = resource_size(io);
1439 rockchip->io_bus_addr = io->start - win->offset;
1440 err = pci_remap_iospace(io, io_base);
1442 dev_warn(dev, "error %d: failed to map resource %pR\n",
1448 case IORESOURCE_MEM:
1451 rockchip->mem_size = resource_size(mem);
1452 rockchip->mem_bus_addr = mem->start - win->offset;
1454 case IORESOURCE_BUS:
1455 rockchip->root_bus_nr = win->res->start;
1462 err = rockchip_pcie_cfg_atu(rockchip);
1466 rockchip->msg_region = devm_ioremap(rockchip->dev,
1467 rockchip->msg_bus_addr, SZ_1M);
1468 if (!rockchip->msg_region) {
1473 list_splice_init(&res, &bridge->windows);
1474 bridge->dev.parent = &pdev->dev;
1475 bridge->sysdata = rockchip;
1477 bridge->ops = &rockchip_pcie_ops;
1478 bridge->map_irq = of_irq_parse_and_map_pci;
1479 bridge->swizzle_irq = pci_common_swizzle;
1481 err = pci_scan_root_bus_bridge(bridge);
1487 rockchip->root_bus = bus;
1489 pci_bus_size_bridges(bus);
1490 pci_bus_assign_resources(bus);
1491 list_for_each_entry(child, &bus->children, node)
1492 pcie_bus_configure_settings(child);
1494 pci_bus_add_devices(bus);
1498 pci_free_resource_list(&res);
1500 if (!IS_ERR(rockchip->vpcie3v3))
1501 regulator_disable(rockchip->vpcie3v3);
1502 if (!IS_ERR(rockchip->vpcie1v8))
1503 regulator_disable(rockchip->vpcie1v8);
1504 if (!IS_ERR(rockchip->vpcie0v9))
1505 regulator_disable(rockchip->vpcie0v9);
1507 clk_disable_unprepare(rockchip->clk_pcie_pm);
1509 clk_disable_unprepare(rockchip->hclk_pcie);
1511 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1513 clk_disable_unprepare(rockchip->aclk_pcie);
1518 static int rockchip_pcie_remove(struct platform_device *pdev)
1520 struct device *dev = &pdev->dev;
1521 struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
1523 pci_stop_root_bus(rockchip->root_bus);
1524 pci_remove_root_bus(rockchip->root_bus);
1525 pci_unmap_iospace(rockchip->io);
1526 irq_domain_remove(rockchip->irq_domain);
1528 phy_power_off(rockchip->phy);
1529 phy_exit(rockchip->phy);
1531 clk_disable_unprepare(rockchip->clk_pcie_pm);
1532 clk_disable_unprepare(rockchip->hclk_pcie);
1533 clk_disable_unprepare(rockchip->aclk_perf_pcie);
1534 clk_disable_unprepare(rockchip->aclk_pcie);
1536 if (!IS_ERR(rockchip->vpcie3v3))
1537 regulator_disable(rockchip->vpcie3v3);
1538 if (!IS_ERR(rockchip->vpcie1v8))
1539 regulator_disable(rockchip->vpcie1v8);
1540 if (!IS_ERR(rockchip->vpcie0v9))
1541 regulator_disable(rockchip->vpcie0v9);
1546 static const struct dev_pm_ops rockchip_pcie_pm_ops = {
1547 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_pcie_suspend_noirq,
1548 rockchip_pcie_resume_noirq)
1551 static const struct of_device_id rockchip_pcie_of_match[] = {
1552 { .compatible = "rockchip,rk3399-pcie", },
1555 MODULE_DEVICE_TABLE(of, rockchip_pcie_of_match);
1557 static struct platform_driver rockchip_pcie_driver = {
1559 .name = "rockchip-pcie",
1560 .of_match_table = rockchip_pcie_of_match,
1561 .pm = &rockchip_pcie_pm_ops,
1563 .probe = rockchip_pcie_probe,
1564 .remove = rockchip_pcie_remove,
1566 module_platform_driver(rockchip_pcie_driver);
1568 MODULE_AUTHOR("Rockchip Inc");
1569 MODULE_DESCRIPTION("Rockchip AXI PCIe driver");
1570 MODULE_LICENSE("GPL v2");