1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Microchip AXI PCIe Bridge host controller driver
4  *
5  * Copyright (c) 2018 - 2020 Microchip Corporation. All rights reserved.
6  *
7  * Author: Daire McNamara <daire.mcnamara@microchip.com>
8  */
9 
10 #include <linux/clk.h>
11 #include <linux/irqchip/chained_irq.h>
12 #include <linux/module.h>
13 #include <linux/msi.h>
14 #include <linux/of_address.h>
15 #include <linux/of_irq.h>
16 #include <linux/of_pci.h>
17 #include <linux/pci-ecam.h>
18 #include <linux/platform_device.h>
19 
20 #include "../pci.h"
21 
22 /* Number of MSI IRQs */
23 #define MC_NUM_MSI_IRQS				32
24 #define MC_NUM_MSI_IRQS_CODED			5
25 
26 /* PCIe Bridge Phy and Controller Phy offsets */
27 #define MC_PCIE1_BRIDGE_ADDR			0x00008000u
28 #define MC_PCIE1_CTRL_ADDR			0x0000a000u
29 
30 #define MC_PCIE_BRIDGE_ADDR			(MC_PCIE1_BRIDGE_ADDR)
31 #define MC_PCIE_CTRL_ADDR			(MC_PCIE1_CTRL_ADDR)
32 
33 /* PCIe Controller Phy Regs */
34 #define SEC_ERROR_CNT				0x20
35 #define DED_ERROR_CNT				0x24
36 #define SEC_ERROR_INT				0x28
37 #define  SEC_ERROR_INT_TX_RAM_SEC_ERR_INT	GENMASK(3, 0)
38 #define  SEC_ERROR_INT_RX_RAM_SEC_ERR_INT	GENMASK(7, 4)
39 #define  SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT	GENMASK(11, 8)
40 #define  SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT	GENMASK(15, 12)
41 #define  NUM_SEC_ERROR_INTS			(4)
42 #define SEC_ERROR_INT_MASK			0x2c
43 #define DED_ERROR_INT				0x30
44 #define  DED_ERROR_INT_TX_RAM_DED_ERR_INT	GENMASK(3, 0)
45 #define  DED_ERROR_INT_RX_RAM_DED_ERR_INT	GENMASK(7, 4)
46 #define  DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT	GENMASK(11, 8)
47 #define  DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT	GENMASK(15, 12)
48 #define  NUM_DED_ERROR_INTS			(4)
49 #define DED_ERROR_INT_MASK			0x34
50 #define ECC_CONTROL				0x38
51 #define  ECC_CONTROL_TX_RAM_INJ_ERROR_0		BIT(0)
52 #define  ECC_CONTROL_TX_RAM_INJ_ERROR_1		BIT(1)
53 #define  ECC_CONTROL_TX_RAM_INJ_ERROR_2		BIT(2)
54 #define  ECC_CONTROL_TX_RAM_INJ_ERROR_3		BIT(3)
55 #define  ECC_CONTROL_RX_RAM_INJ_ERROR_0		BIT(4)
56 #define  ECC_CONTROL_RX_RAM_INJ_ERROR_1		BIT(5)
57 #define  ECC_CONTROL_RX_RAM_INJ_ERROR_2		BIT(6)
58 #define  ECC_CONTROL_RX_RAM_INJ_ERROR_3		BIT(7)
59 #define  ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_0	BIT(8)
60 #define  ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_1	BIT(9)
61 #define  ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_2	BIT(10)
62 #define  ECC_CONTROL_PCIE2AXI_RAM_INJ_ERROR_3	BIT(11)
63 #define  ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_0	BIT(12)
64 #define  ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_1	BIT(13)
65 #define  ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_2	BIT(14)
66 #define  ECC_CONTROL_AXI2PCIE_RAM_INJ_ERROR_3	BIT(15)
67 #define  ECC_CONTROL_TX_RAM_ECC_BYPASS		BIT(24)
68 #define  ECC_CONTROL_RX_RAM_ECC_BYPASS		BIT(25)
69 #define  ECC_CONTROL_PCIE2AXI_RAM_ECC_BYPASS	BIT(26)
70 #define  ECC_CONTROL_AXI2PCIE_RAM_ECC_BYPASS	BIT(27)
71 #define LTSSM_STATE				0x5c
72 #define  LTSSM_L0_STATE				0x10
73 #define PCIE_EVENT_INT				0x14c
74 #define  PCIE_EVENT_INT_L2_EXIT_INT		BIT(0)
75 #define  PCIE_EVENT_INT_HOTRST_EXIT_INT		BIT(1)
76 #define  PCIE_EVENT_INT_DLUP_EXIT_INT		BIT(2)
77 #define  PCIE_EVENT_INT_MASK			GENMASK(2, 0)
78 #define  PCIE_EVENT_INT_L2_EXIT_INT_MASK	BIT(16)
79 #define  PCIE_EVENT_INT_HOTRST_EXIT_INT_MASK	BIT(17)
80 #define  PCIE_EVENT_INT_DLUP_EXIT_INT_MASK	BIT(18)
81 #define  PCIE_EVENT_INT_ENB_MASK		GENMASK(18, 16)
82 #define  PCIE_EVENT_INT_ENB_SHIFT		16
83 #define  NUM_PCIE_EVENTS			(3)
84 
85 /* PCIe Bridge Phy Regs */
86 #define PCIE_PCI_IDS_DW1			0x9c
87 
88 /* PCIe Config space MSI capability structure */
89 #define MC_MSI_CAP_CTRL_OFFSET			0xe0u
90 #define  MC_MSI_MAX_Q_AVAIL			(MC_NUM_MSI_IRQS_CODED << 1)
91 #define  MC_MSI_Q_SIZE				(MC_NUM_MSI_IRQS_CODED << 4)
92 
93 #define IMASK_LOCAL				0x180
94 #define  DMA_END_ENGINE_0_MASK			0x00000000u
95 #define  DMA_END_ENGINE_0_SHIFT			0
96 #define  DMA_END_ENGINE_1_MASK			0x00000000u
97 #define  DMA_END_ENGINE_1_SHIFT			1
98 #define  DMA_ERROR_ENGINE_0_MASK		0x00000100u
99 #define  DMA_ERROR_ENGINE_0_SHIFT		8
100 #define  DMA_ERROR_ENGINE_1_MASK		0x00000200u
101 #define  DMA_ERROR_ENGINE_1_SHIFT		9
102 #define  A_ATR_EVT_POST_ERR_MASK		0x00010000u
103 #define  A_ATR_EVT_POST_ERR_SHIFT		16
104 #define  A_ATR_EVT_FETCH_ERR_MASK		0x00020000u
105 #define  A_ATR_EVT_FETCH_ERR_SHIFT		17
106 #define  A_ATR_EVT_DISCARD_ERR_MASK		0x00040000u
107 #define  A_ATR_EVT_DISCARD_ERR_SHIFT		18
108 #define  A_ATR_EVT_DOORBELL_MASK		0x00000000u
109 #define  A_ATR_EVT_DOORBELL_SHIFT		19
110 #define  P_ATR_EVT_POST_ERR_MASK		0x00100000u
111 #define  P_ATR_EVT_POST_ERR_SHIFT		20
112 #define  P_ATR_EVT_FETCH_ERR_MASK		0x00200000u
113 #define  P_ATR_EVT_FETCH_ERR_SHIFT		21
114 #define  P_ATR_EVT_DISCARD_ERR_MASK		0x00400000u
115 #define  P_ATR_EVT_DISCARD_ERR_SHIFT		22
116 #define  P_ATR_EVT_DOORBELL_MASK		0x00000000u
117 #define  P_ATR_EVT_DOORBELL_SHIFT		23
118 #define  PM_MSI_INT_INTA_MASK			0x01000000u
119 #define  PM_MSI_INT_INTA_SHIFT			24
120 #define  PM_MSI_INT_INTB_MASK			0x02000000u
121 #define  PM_MSI_INT_INTB_SHIFT			25
122 #define  PM_MSI_INT_INTC_MASK			0x04000000u
123 #define  PM_MSI_INT_INTC_SHIFT			26
124 #define  PM_MSI_INT_INTD_MASK			0x08000000u
125 #define  PM_MSI_INT_INTD_SHIFT			27
126 #define  PM_MSI_INT_INTX_MASK			0x0f000000u
127 #define  PM_MSI_INT_INTX_SHIFT			24
128 #define  PM_MSI_INT_MSI_MASK			0x10000000u
129 #define  PM_MSI_INT_MSI_SHIFT			28
130 #define  PM_MSI_INT_AER_EVT_MASK		0x20000000u
131 #define  PM_MSI_INT_AER_EVT_SHIFT		29
132 #define  PM_MSI_INT_EVENTS_MASK			0x40000000u
133 #define  PM_MSI_INT_EVENTS_SHIFT		30
134 #define  PM_MSI_INT_SYS_ERR_MASK		0x80000000u
135 #define  PM_MSI_INT_SYS_ERR_SHIFT		31
136 #define  NUM_LOCAL_EVENTS			15
137 #define ISTATUS_LOCAL				0x184
138 #define IMASK_HOST				0x188
139 #define ISTATUS_HOST				0x18c
140 #define MSI_ADDR				0x190
141 #define ISTATUS_MSI				0x194
142 
143 /* PCIe Master table init defines */
144 #define ATR0_PCIE_WIN0_SRCADDR_PARAM		0x600u
145 #define  ATR0_PCIE_ATR_SIZE			0x25
146 #define  ATR0_PCIE_ATR_SIZE_SHIFT		1
147 #define ATR0_PCIE_WIN0_SRC_ADDR			0x604u
148 #define ATR0_PCIE_WIN0_TRSL_ADDR_LSB		0x608u
149 #define ATR0_PCIE_WIN0_TRSL_ADDR_UDW		0x60cu
150 #define ATR0_PCIE_WIN0_TRSL_PARAM		0x610u
151 
152 /* PCIe AXI slave table init defines */
153 #define ATR0_AXI4_SLV0_SRCADDR_PARAM		0x800u
154 #define  ATR_SIZE_SHIFT				1
155 #define  ATR_IMPL_ENABLE			1
156 #define ATR0_AXI4_SLV0_SRC_ADDR			0x804u
157 #define ATR0_AXI4_SLV0_TRSL_ADDR_LSB		0x808u
158 #define ATR0_AXI4_SLV0_TRSL_ADDR_UDW		0x80cu
159 #define ATR0_AXI4_SLV0_TRSL_PARAM		0x810u
160 #define  PCIE_TX_RX_INTERFACE			0x00000000u
161 #define  PCIE_CONFIG_INTERFACE			0x00000001u
162 
163 #define ATR_ENTRY_SIZE				32
164 
165 #define EVENT_PCIE_L2_EXIT			0
166 #define EVENT_PCIE_HOTRST_EXIT			1
167 #define EVENT_PCIE_DLUP_EXIT			2
168 #define EVENT_SEC_TX_RAM_SEC_ERR		3
169 #define EVENT_SEC_RX_RAM_SEC_ERR		4
170 #define EVENT_SEC_AXI2PCIE_RAM_SEC_ERR		5
171 #define EVENT_SEC_PCIE2AXI_RAM_SEC_ERR		6
172 #define EVENT_DED_TX_RAM_DED_ERR		7
173 #define EVENT_DED_RX_RAM_DED_ERR		8
174 #define EVENT_DED_AXI2PCIE_RAM_DED_ERR		9
175 #define EVENT_DED_PCIE2AXI_RAM_DED_ERR		10
176 #define EVENT_LOCAL_DMA_END_ENGINE_0		11
177 #define EVENT_LOCAL_DMA_END_ENGINE_1		12
178 #define EVENT_LOCAL_DMA_ERROR_ENGINE_0		13
179 #define EVENT_LOCAL_DMA_ERROR_ENGINE_1		14
180 #define EVENT_LOCAL_A_ATR_EVT_POST_ERR		15
181 #define EVENT_LOCAL_A_ATR_EVT_FETCH_ERR		16
182 #define EVENT_LOCAL_A_ATR_EVT_DISCARD_ERR	17
183 #define EVENT_LOCAL_A_ATR_EVT_DOORBELL		18
184 #define EVENT_LOCAL_P_ATR_EVT_POST_ERR		19
185 #define EVENT_LOCAL_P_ATR_EVT_FETCH_ERR		20
186 #define EVENT_LOCAL_P_ATR_EVT_DISCARD_ERR	21
187 #define EVENT_LOCAL_P_ATR_EVT_DOORBELL		22
188 #define EVENT_LOCAL_PM_MSI_INT_INTX		23
189 #define EVENT_LOCAL_PM_MSI_INT_MSI		24
190 #define EVENT_LOCAL_PM_MSI_INT_AER_EVT		25
191 #define EVENT_LOCAL_PM_MSI_INT_EVENTS		26
192 #define EVENT_LOCAL_PM_MSI_INT_SYS_ERR		27
193 #define NUM_EVENTS				28
194 
195 #define PCIE_EVENT_CAUSE(x, s)	\
196 	[EVENT_PCIE_ ## x] = { __stringify(x), s }
197 
198 #define SEC_ERROR_CAUSE(x, s) \
199 	[EVENT_SEC_ ## x] = { __stringify(x), s }
200 
201 #define DED_ERROR_CAUSE(x, s) \
202 	[EVENT_DED_ ## x] = { __stringify(x), s }
203 
204 #define LOCAL_EVENT_CAUSE(x, s) \
205 	[EVENT_LOCAL_ ## x] = { __stringify(x), s }
206 
207 #define PCIE_EVENT(x) \
208 	.base = MC_PCIE_CTRL_ADDR, \
209 	.offset = PCIE_EVENT_INT, \
210 	.mask_offset = PCIE_EVENT_INT, \
211 	.mask_high = 1, \
212 	.mask = PCIE_EVENT_INT_ ## x ## _INT, \
213 	.enb_mask = PCIE_EVENT_INT_ENB_MASK
214 
215 #define SEC_EVENT(x) \
216 	.base = MC_PCIE_CTRL_ADDR, \
217 	.offset = SEC_ERROR_INT, \
218 	.mask_offset = SEC_ERROR_INT_MASK, \
219 	.mask = SEC_ERROR_INT_ ## x ## _INT, \
220 	.mask_high = 1, \
221 	.enb_mask = 0
222 
223 #define DED_EVENT(x) \
224 	.base = MC_PCIE_CTRL_ADDR, \
225 	.offset = DED_ERROR_INT, \
226 	.mask_offset = DED_ERROR_INT_MASK, \
227 	.mask_high = 1, \
228 	.mask = DED_ERROR_INT_ ## x ## _INT, \
229 	.enb_mask = 0
230 
231 #define LOCAL_EVENT(x) \
232 	.base = MC_PCIE_BRIDGE_ADDR, \
233 	.offset = ISTATUS_LOCAL, \
234 	.mask_offset = IMASK_LOCAL, \
235 	.mask_high = 0, \
236 	.mask = x ## _MASK, \
237 	.enb_mask = 0
238 
239 #define PCIE_EVENT_TO_EVENT_MAP(x) \
240 	{ PCIE_EVENT_INT_ ## x ## _INT, EVENT_PCIE_ ## x }
241 
242 #define SEC_ERROR_TO_EVENT_MAP(x) \
243 	{ SEC_ERROR_INT_ ## x ## _INT, EVENT_SEC_ ## x }
244 
245 #define DED_ERROR_TO_EVENT_MAP(x) \
246 	{ DED_ERROR_INT_ ## x ## _INT, EVENT_DED_ ## x }
247 
248 #define LOCAL_STATUS_TO_EVENT_MAP(x) \
249 	{ x ## _MASK, EVENT_LOCAL_ ## x }
250 
251 struct event_map {
252 	u32 reg_mask;
253 	u32 event_bit;
254 };
255 
256 struct mc_msi {
257 	struct mutex lock;		/* Protect used bitmap */
258 	struct irq_domain *msi_domain;
259 	struct irq_domain *dev_domain;
260 	u32 num_vectors;
261 	u64 vector_phy;
262 	DECLARE_BITMAP(used, MC_NUM_MSI_IRQS);
263 };
264 
265 struct mc_pcie {
266 	void __iomem *axi_base_addr;
267 	struct device *dev;
268 	struct irq_domain *intx_domain;
269 	struct irq_domain *event_domain;
270 	raw_spinlock_t lock;
271 	struct mc_msi msi;
272 };
273 
274 struct cause {
275 	const char *sym;
276 	const char *str;
277 };
278 
279 static const struct cause event_cause[NUM_EVENTS] = {
280 	PCIE_EVENT_CAUSE(L2_EXIT, "L2 exit event"),
281 	PCIE_EVENT_CAUSE(HOTRST_EXIT, "Hot reset exit event"),
282 	PCIE_EVENT_CAUSE(DLUP_EXIT, "DLUP exit event"),
283 	SEC_ERROR_CAUSE(TX_RAM_SEC_ERR,  "sec error in tx buffer"),
284 	SEC_ERROR_CAUSE(RX_RAM_SEC_ERR,  "sec error in rx buffer"),
285 	SEC_ERROR_CAUSE(PCIE2AXI_RAM_SEC_ERR,  "sec error in pcie2axi buffer"),
286 	SEC_ERROR_CAUSE(AXI2PCIE_RAM_SEC_ERR,  "sec error in axi2pcie buffer"),
287 	DED_ERROR_CAUSE(TX_RAM_DED_ERR,  "ded error in tx buffer"),
288 	DED_ERROR_CAUSE(RX_RAM_DED_ERR,  "ded error in rx buffer"),
289 	DED_ERROR_CAUSE(PCIE2AXI_RAM_DED_ERR,  "ded error in pcie2axi buffer"),
290 	DED_ERROR_CAUSE(AXI2PCIE_RAM_DED_ERR,  "ded error in axi2pcie buffer"),
291 	LOCAL_EVENT_CAUSE(DMA_ERROR_ENGINE_0, "dma engine 0 error"),
292 	LOCAL_EVENT_CAUSE(DMA_ERROR_ENGINE_1, "dma engine 1 error"),
293 	LOCAL_EVENT_CAUSE(A_ATR_EVT_POST_ERR, "axi write request error"),
294 	LOCAL_EVENT_CAUSE(A_ATR_EVT_FETCH_ERR, "axi read request error"),
295 	LOCAL_EVENT_CAUSE(A_ATR_EVT_DISCARD_ERR, "axi read timeout"),
296 	LOCAL_EVENT_CAUSE(P_ATR_EVT_POST_ERR, "pcie write request error"),
297 	LOCAL_EVENT_CAUSE(P_ATR_EVT_FETCH_ERR, "pcie read request error"),
298 	LOCAL_EVENT_CAUSE(P_ATR_EVT_DISCARD_ERR, "pcie read timeout"),
299 	LOCAL_EVENT_CAUSE(PM_MSI_INT_AER_EVT, "aer event"),
300 	LOCAL_EVENT_CAUSE(PM_MSI_INT_EVENTS, "pm/ltr/hotplug event"),
301 	LOCAL_EVENT_CAUSE(PM_MSI_INT_SYS_ERR, "system error"),
302 };
303 
304 static struct event_map pcie_event_to_event[] = {
305 	PCIE_EVENT_TO_EVENT_MAP(L2_EXIT),
306 	PCIE_EVENT_TO_EVENT_MAP(HOTRST_EXIT),
307 	PCIE_EVENT_TO_EVENT_MAP(DLUP_EXIT),
308 };
309 
310 static struct event_map sec_error_to_event[] = {
311 	SEC_ERROR_TO_EVENT_MAP(TX_RAM_SEC_ERR),
312 	SEC_ERROR_TO_EVENT_MAP(RX_RAM_SEC_ERR),
313 	SEC_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_SEC_ERR),
314 	SEC_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_SEC_ERR),
315 };
316 
317 static struct event_map ded_error_to_event[] = {
318 	DED_ERROR_TO_EVENT_MAP(TX_RAM_DED_ERR),
319 	DED_ERROR_TO_EVENT_MAP(RX_RAM_DED_ERR),
320 	DED_ERROR_TO_EVENT_MAP(PCIE2AXI_RAM_DED_ERR),
321 	DED_ERROR_TO_EVENT_MAP(AXI2PCIE_RAM_DED_ERR),
322 };
323 
324 static struct event_map local_status_to_event[] = {
325 	LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_0),
326 	LOCAL_STATUS_TO_EVENT_MAP(DMA_END_ENGINE_1),
327 	LOCAL_STATUS_TO_EVENT_MAP(DMA_ERROR_ENGINE_0),
328 	LOCAL_STATUS_TO_EVENT_MAP(DMA_ERROR_ENGINE_1),
329 	LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_POST_ERR),
330 	LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_FETCH_ERR),
331 	LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_DISCARD_ERR),
332 	LOCAL_STATUS_TO_EVENT_MAP(A_ATR_EVT_DOORBELL),
333 	LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_POST_ERR),
334 	LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_FETCH_ERR),
335 	LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_DISCARD_ERR),
336 	LOCAL_STATUS_TO_EVENT_MAP(P_ATR_EVT_DOORBELL),
337 	LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_INTX),
338 	LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_MSI),
339 	LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_AER_EVT),
340 	LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_EVENTS),
341 	LOCAL_STATUS_TO_EVENT_MAP(PM_MSI_INT_SYS_ERR),
342 };
343 
344 static struct {
345 	u32 base;
346 	u32 offset;
347 	u32 mask;
348 	u32 shift;
349 	u32 enb_mask;
350 	u32 mask_high;
351 	u32 mask_offset;
352 } event_descs[] = {
353 	{ PCIE_EVENT(L2_EXIT) },
354 	{ PCIE_EVENT(HOTRST_EXIT) },
355 	{ PCIE_EVENT(DLUP_EXIT) },
356 	{ SEC_EVENT(TX_RAM_SEC_ERR) },
357 	{ SEC_EVENT(RX_RAM_SEC_ERR) },
358 	{ SEC_EVENT(PCIE2AXI_RAM_SEC_ERR) },
359 	{ SEC_EVENT(AXI2PCIE_RAM_SEC_ERR) },
360 	{ DED_EVENT(TX_RAM_DED_ERR) },
361 	{ DED_EVENT(RX_RAM_DED_ERR) },
362 	{ DED_EVENT(PCIE2AXI_RAM_DED_ERR) },
363 	{ DED_EVENT(AXI2PCIE_RAM_DED_ERR) },
364 	{ LOCAL_EVENT(DMA_END_ENGINE_0) },
365 	{ LOCAL_EVENT(DMA_END_ENGINE_1) },
366 	{ LOCAL_EVENT(DMA_ERROR_ENGINE_0) },
367 	{ LOCAL_EVENT(DMA_ERROR_ENGINE_1) },
368 	{ LOCAL_EVENT(A_ATR_EVT_POST_ERR) },
369 	{ LOCAL_EVENT(A_ATR_EVT_FETCH_ERR) },
370 	{ LOCAL_EVENT(A_ATR_EVT_DISCARD_ERR) },
371 	{ LOCAL_EVENT(A_ATR_EVT_DOORBELL) },
372 	{ LOCAL_EVENT(P_ATR_EVT_POST_ERR) },
373 	{ LOCAL_EVENT(P_ATR_EVT_FETCH_ERR) },
374 	{ LOCAL_EVENT(P_ATR_EVT_DISCARD_ERR) },
375 	{ LOCAL_EVENT(P_ATR_EVT_DOORBELL) },
376 	{ LOCAL_EVENT(PM_MSI_INT_INTX) },
377 	{ LOCAL_EVENT(PM_MSI_INT_MSI) },
378 	{ LOCAL_EVENT(PM_MSI_INT_AER_EVT) },
379 	{ LOCAL_EVENT(PM_MSI_INT_EVENTS) },
380 	{ LOCAL_EVENT(PM_MSI_INT_SYS_ERR) },
381 };
382 
383 static char poss_clks[][5] = { "fic0", "fic1", "fic2", "fic3" };
384 
385 static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *base)
386 {
387 	struct mc_msi *msi = &port->msi;
388 	u32 cap_offset = MC_MSI_CAP_CTRL_OFFSET;
389 	u16 msg_ctrl = readw_relaxed(base + cap_offset + PCI_MSI_FLAGS);
390 
391 	msg_ctrl |= PCI_MSI_FLAGS_ENABLE;
392 	msg_ctrl &= ~PCI_MSI_FLAGS_QMASK;
393 	msg_ctrl |= MC_MSI_MAX_Q_AVAIL;
394 	msg_ctrl &= ~PCI_MSI_FLAGS_QSIZE;
395 	msg_ctrl |= MC_MSI_Q_SIZE;
396 	msg_ctrl |= PCI_MSI_FLAGS_64BIT;
397 
398 	writew_relaxed(msg_ctrl, base + cap_offset + PCI_MSI_FLAGS);
399 
400 	writel_relaxed(lower_32_bits(msi->vector_phy),
401 		       base + cap_offset + PCI_MSI_ADDRESS_LO);
402 	writel_relaxed(upper_32_bits(msi->vector_phy),
403 		       base + cap_offset + PCI_MSI_ADDRESS_HI);
404 }
405 
406 static void mc_handle_msi(struct irq_desc *desc)
407 {
408 	struct mc_pcie *port = irq_desc_get_handler_data(desc);
409 	struct device *dev = port->dev;
410 	struct mc_msi *msi = &port->msi;
411 	void __iomem *bridge_base_addr =
412 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
413 	unsigned long status;
414 	u32 bit;
415 	int ret;
416 
417 	status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
418 	if (status & PM_MSI_INT_MSI_MASK) {
419 		status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
420 		for_each_set_bit(bit, &status, msi->num_vectors) {
421 			ret = generic_handle_domain_irq(msi->dev_domain, bit);
422 			if (ret)
423 				dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
424 						    bit);
425 		}
426 	}
427 }
428 
429 static void mc_msi_bottom_irq_ack(struct irq_data *data)
430 {
431 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
432 	void __iomem *bridge_base_addr =
433 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
434 	u32 bitpos = data->hwirq;
435 	unsigned long status;
436 
437 	writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
438 	status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
439 	if (!status)
440 		writel_relaxed(BIT(PM_MSI_INT_MSI_SHIFT),
441 			       bridge_base_addr + ISTATUS_LOCAL);
442 }
443 
444 static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
445 {
446 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
447 	phys_addr_t addr = port->msi.vector_phy;
448 
449 	msg->address_lo = lower_32_bits(addr);
450 	msg->address_hi = upper_32_bits(addr);
451 	msg->data = data->hwirq;
452 
453 	dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
454 		(int)data->hwirq, msg->address_hi, msg->address_lo);
455 }
456 
457 static int mc_msi_set_affinity(struct irq_data *irq_data,
458 			       const struct cpumask *mask, bool force)
459 {
460 	return -EINVAL;
461 }
462 
463 static struct irq_chip mc_msi_bottom_irq_chip = {
464 	.name = "Microchip MSI",
465 	.irq_ack = mc_msi_bottom_irq_ack,
466 	.irq_compose_msi_msg = mc_compose_msi_msg,
467 	.irq_set_affinity = mc_msi_set_affinity,
468 };
469 
470 static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
471 				   unsigned int nr_irqs, void *args)
472 {
473 	struct mc_pcie *port = domain->host_data;
474 	struct mc_msi *msi = &port->msi;
475 	void __iomem *bridge_base_addr =
476 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
477 	unsigned long bit;
478 	u32 val;
479 
480 	mutex_lock(&msi->lock);
481 	bit = find_first_zero_bit(msi->used, msi->num_vectors);
482 	if (bit >= msi->num_vectors) {
483 		mutex_unlock(&msi->lock);
484 		return -ENOSPC;
485 	}
486 
487 	set_bit(bit, msi->used);
488 
489 	irq_domain_set_info(domain, virq, bit, &mc_msi_bottom_irq_chip,
490 			    domain->host_data, handle_edge_irq, NULL, NULL);
491 
492 	/* Enable MSI interrupts */
493 	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
494 	val |= PM_MSI_INT_MSI_MASK;
495 	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
496 
497 	mutex_unlock(&msi->lock);
498 
499 	return 0;
500 }
501 
502 static void mc_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
503 				   unsigned int nr_irqs)
504 {
505 	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
506 	struct mc_pcie *port = irq_data_get_irq_chip_data(d);
507 	struct mc_msi *msi = &port->msi;
508 
509 	mutex_lock(&msi->lock);
510 
511 	if (test_bit(d->hwirq, msi->used))
512 		__clear_bit(d->hwirq, msi->used);
513 	else
514 		dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
515 
516 	mutex_unlock(&msi->lock);
517 }
518 
519 static const struct irq_domain_ops msi_domain_ops = {
520 	.alloc	= mc_irq_msi_domain_alloc,
521 	.free	= mc_irq_msi_domain_free,
522 };
523 
524 static struct irq_chip mc_msi_irq_chip = {
525 	.name = "Microchip PCIe MSI",
526 	.irq_ack = irq_chip_ack_parent,
527 	.irq_mask = pci_msi_mask_irq,
528 	.irq_unmask = pci_msi_unmask_irq,
529 };
530 
531 static struct msi_domain_info mc_msi_domain_info = {
532 	.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
533 		  MSI_FLAG_PCI_MSIX),
534 	.chip = &mc_msi_irq_chip,
535 };
536 
537 static int mc_allocate_msi_domains(struct mc_pcie *port)
538 {
539 	struct device *dev = port->dev;
540 	struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
541 	struct mc_msi *msi = &port->msi;
542 
543 	mutex_init(&port->msi.lock);
544 
545 	msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
546 						&msi_domain_ops, port);
547 	if (!msi->dev_domain) {
548 		dev_err(dev, "failed to create IRQ domain\n");
549 		return -ENOMEM;
550 	}
551 
552 	msi->msi_domain = pci_msi_create_irq_domain(fwnode, &mc_msi_domain_info,
553 						    msi->dev_domain);
554 	if (!msi->msi_domain) {
555 		dev_err(dev, "failed to create MSI domain\n");
556 		irq_domain_remove(msi->dev_domain);
557 		return -ENOMEM;
558 	}
559 
560 	return 0;
561 }
562 
563 static void mc_handle_intx(struct irq_desc *desc)
564 {
565 	struct mc_pcie *port = irq_desc_get_handler_data(desc);
566 	struct device *dev = port->dev;
567 	void __iomem *bridge_base_addr =
568 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
569 	unsigned long status;
570 	u32 bit;
571 	int ret;
572 
573 	status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
574 	if (status & PM_MSI_INT_INTX_MASK) {
575 		status &= PM_MSI_INT_INTX_MASK;
576 		status >>= PM_MSI_INT_INTX_SHIFT;
577 		for_each_set_bit(bit, &status, PCI_NUM_INTX) {
578 			ret = generic_handle_domain_irq(port->intx_domain, bit);
579 			if (ret)
580 				dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
581 						    bit);
582 		}
583 	}
584 }
585 
586 static void mc_ack_intx_irq(struct irq_data *data)
587 {
588 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
589 	void __iomem *bridge_base_addr =
590 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
591 	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
592 
593 	writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
594 }
595 
596 static void mc_mask_intx_irq(struct irq_data *data)
597 {
598 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
599 	void __iomem *bridge_base_addr =
600 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
601 	unsigned long flags;
602 	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
603 	u32 val;
604 
605 	raw_spin_lock_irqsave(&port->lock, flags);
606 	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
607 	val &= ~mask;
608 	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
609 	raw_spin_unlock_irqrestore(&port->lock, flags);
610 }
611 
612 static void mc_unmask_intx_irq(struct irq_data *data)
613 {
614 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
615 	void __iomem *bridge_base_addr =
616 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
617 	unsigned long flags;
618 	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
619 	u32 val;
620 
621 	raw_spin_lock_irqsave(&port->lock, flags);
622 	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
623 	val |= mask;
624 	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
625 	raw_spin_unlock_irqrestore(&port->lock, flags);
626 }
627 
628 static struct irq_chip mc_intx_irq_chip = {
629 	.name = "Microchip PCIe INTx",
630 	.irq_ack = mc_ack_intx_irq,
631 	.irq_mask = mc_mask_intx_irq,
632 	.irq_unmask = mc_unmask_intx_irq,
633 };
634 
635 static int mc_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
636 			    irq_hw_number_t hwirq)
637 {
638 	irq_set_chip_and_handler(irq, &mc_intx_irq_chip, handle_level_irq);
639 	irq_set_chip_data(irq, domain->host_data);
640 
641 	return 0;
642 }
643 
644 static const struct irq_domain_ops intx_domain_ops = {
645 	.map = mc_pcie_intx_map,
646 };
647 
648 static inline u32 reg_to_event(u32 reg, struct event_map field)
649 {
650 	return (reg & field.reg_mask) ? BIT(field.event_bit) : 0;
651 }
652 
653 static u32 pcie_events(void __iomem *addr)
654 {
655 	u32 reg = readl_relaxed(addr);
656 	u32 val = 0;
657 	int i;
658 
659 	for (i = 0; i < ARRAY_SIZE(pcie_event_to_event); i++)
660 		val |= reg_to_event(reg, pcie_event_to_event[i]);
661 
662 	return val;
663 }
664 
665 static u32 sec_errors(void __iomem *addr)
666 {
667 	u32 reg = readl_relaxed(addr);
668 	u32 val = 0;
669 	int i;
670 
671 	for (i = 0; i < ARRAY_SIZE(sec_error_to_event); i++)
672 		val |= reg_to_event(reg, sec_error_to_event[i]);
673 
674 	return val;
675 }
676 
677 static u32 ded_errors(void __iomem *addr)
678 {
679 	u32 reg = readl_relaxed(addr);
680 	u32 val = 0;
681 	int i;
682 
683 	for (i = 0; i < ARRAY_SIZE(ded_error_to_event); i++)
684 		val |= reg_to_event(reg, ded_error_to_event[i]);
685 
686 	return val;
687 }
688 
689 static u32 local_events(void __iomem *addr)
690 {
691 	u32 reg = readl_relaxed(addr);
692 	u32 val = 0;
693 	int i;
694 
695 	for (i = 0; i < ARRAY_SIZE(local_status_to_event); i++)
696 		val |= reg_to_event(reg, local_status_to_event[i]);
697 
698 	return val;
699 }
700 
701 static u32 get_events(struct mc_pcie *port)
702 {
703 	void __iomem *bridge_base_addr =
704 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
705 	void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;
706 	u32 events = 0;
707 
708 	events |= pcie_events(ctrl_base_addr + PCIE_EVENT_INT);
709 	events |= sec_errors(ctrl_base_addr + SEC_ERROR_INT);
710 	events |= ded_errors(ctrl_base_addr + DED_ERROR_INT);
711 	events |= local_events(bridge_base_addr + ISTATUS_LOCAL);
712 
713 	return events;
714 }
715 
716 static irqreturn_t mc_event_handler(int irq, void *dev_id)
717 {
718 	struct mc_pcie *port = dev_id;
719 	struct device *dev = port->dev;
720 	struct irq_data *data;
721 
722 	data = irq_domain_get_irq_data(port->event_domain, irq);
723 
724 	if (event_cause[data->hwirq].str)
725 		dev_err_ratelimited(dev, "%s\n", event_cause[data->hwirq].str);
726 	else
727 		dev_err_ratelimited(dev, "bad event IRQ %ld\n", data->hwirq);
728 
729 	return IRQ_HANDLED;
730 }
731 
732 static void mc_handle_event(struct irq_desc *desc)
733 {
734 	struct mc_pcie *port = irq_desc_get_handler_data(desc);
735 	unsigned long events;
736 	u32 bit;
737 	struct irq_chip *chip = irq_desc_get_chip(desc);
738 
739 	chained_irq_enter(chip, desc);
740 
741 	events = get_events(port);
742 
743 	for_each_set_bit(bit, &events, NUM_EVENTS)
744 		generic_handle_domain_irq(port->event_domain, bit);
745 
746 	chained_irq_exit(chip, desc);
747 }
748 
749 static void mc_ack_event_irq(struct irq_data *data)
750 {
751 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
752 	u32 event = data->hwirq;
753 	void __iomem *addr;
754 	u32 mask;
755 
756 	addr = port->axi_base_addr + event_descs[event].base +
757 		event_descs[event].offset;
758 	mask = event_descs[event].mask;
759 	mask |= event_descs[event].enb_mask;
760 
761 	writel_relaxed(mask, addr);
762 }
763 
764 static void mc_mask_event_irq(struct irq_data *data)
765 {
766 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
767 	u32 event = data->hwirq;
768 	void __iomem *addr;
769 	u32 mask;
770 	u32 val;
771 
772 	addr = port->axi_base_addr + event_descs[event].base +
773 		event_descs[event].mask_offset;
774 	mask = event_descs[event].mask;
775 	if (event_descs[event].enb_mask) {
776 		mask <<= PCIE_EVENT_INT_ENB_SHIFT;
777 		mask &= PCIE_EVENT_INT_ENB_MASK;
778 	}
779 
780 	if (!event_descs[event].mask_high)
781 		mask = ~mask;
782 
783 	raw_spin_lock(&port->lock);
784 	val = readl_relaxed(addr);
785 	if (event_descs[event].mask_high)
786 		val |= mask;
787 	else
788 		val &= mask;
789 
790 	writel_relaxed(val, addr);
791 	raw_spin_unlock(&port->lock);
792 }
793 
794 static void mc_unmask_event_irq(struct irq_data *data)
795 {
796 	struct mc_pcie *port = irq_data_get_irq_chip_data(data);
797 	u32 event = data->hwirq;
798 	void __iomem *addr;
799 	u32 mask;
800 	u32 val;
801 
802 	addr = port->axi_base_addr + event_descs[event].base +
803 		event_descs[event].mask_offset;
804 	mask = event_descs[event].mask;
805 
806 	if (event_descs[event].enb_mask)
807 		mask <<= PCIE_EVENT_INT_ENB_SHIFT;
808 
809 	if (event_descs[event].mask_high)
810 		mask = ~mask;
811 
812 	if (event_descs[event].enb_mask)
813 		mask &= PCIE_EVENT_INT_ENB_MASK;
814 
815 	raw_spin_lock(&port->lock);
816 	val = readl_relaxed(addr);
817 	if (event_descs[event].mask_high)
818 		val &= mask;
819 	else
820 		val |= mask;
821 	writel_relaxed(val, addr);
822 	raw_spin_unlock(&port->lock);
823 }
824 
825 static struct irq_chip mc_event_irq_chip = {
826 	.name = "Microchip PCIe EVENT",
827 	.irq_ack = mc_ack_event_irq,
828 	.irq_mask = mc_mask_event_irq,
829 	.irq_unmask = mc_unmask_event_irq,
830 };
831 
832 static int mc_pcie_event_map(struct irq_domain *domain, unsigned int irq,
833 			     irq_hw_number_t hwirq)
834 {
835 	irq_set_chip_and_handler(irq, &mc_event_irq_chip, handle_level_irq);
836 	irq_set_chip_data(irq, domain->host_data);
837 
838 	return 0;
839 }
840 
841 static const struct irq_domain_ops event_domain_ops = {
842 	.map = mc_pcie_event_map,
843 };
844 
845 static inline struct clk *mc_pcie_init_clk(struct device *dev, const char *id)
846 {
847 	struct clk *clk;
848 	int ret;
849 
850 	clk = devm_clk_get_optional(dev, id);
851 	if (IS_ERR(clk))
852 		return clk;
853 	if (!clk)
854 		return clk;
855 
856 	ret = clk_prepare_enable(clk);
857 	if (ret)
858 		return ERR_PTR(ret);
859 
860 	devm_add_action_or_reset(dev, (void (*) (void *))clk_disable_unprepare,
861 				 clk);
862 
863 	return clk;
864 }
865 
866 static int mc_pcie_init_clks(struct device *dev)
867 {
868 	int i;
869 	struct clk *fic;
870 
871 	/*
872 	 * PCIe may be clocked via Fabric Interface using between 1 and 4
873 	 * clocks. Scan DT for clocks and enable them if present
874 	 */
875 	for (i = 0; i < ARRAY_SIZE(poss_clks); i++) {
876 		fic = mc_pcie_init_clk(dev, poss_clks[i]);
877 		if (IS_ERR(fic))
878 			return PTR_ERR(fic);
879 	}
880 
881 	return 0;
882 }
883 
884 static int mc_pcie_init_irq_domains(struct mc_pcie *port)
885 {
886 	struct device *dev = port->dev;
887 	struct device_node *node = dev->of_node;
888 	struct device_node *pcie_intc_node;
889 
890 	/* Setup INTx */
891 	pcie_intc_node = of_get_next_child(node, NULL);
892 	if (!pcie_intc_node) {
893 		dev_err(dev, "failed to find PCIe Intc node\n");
894 		return -EINVAL;
895 	}
896 
897 	port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS,
898 						   &event_domain_ops, port);
899 	if (!port->event_domain) {
900 		dev_err(dev, "failed to get event domain\n");
901 		return -ENOMEM;
902 	}
903 
904 	irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS);
905 
906 	port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
907 						  &intx_domain_ops, port);
908 	if (!port->intx_domain) {
909 		dev_err(dev, "failed to get an INTx IRQ domain\n");
910 		return -ENOMEM;
911 	}
912 
913 	irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED);
914 
915 	of_node_put(pcie_intc_node);
916 	raw_spin_lock_init(&port->lock);
917 
918 	return mc_allocate_msi_domains(port);
919 }
920 
921 static void mc_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
922 				 phys_addr_t axi_addr, phys_addr_t pci_addr,
923 				 size_t size)
924 {
925 	u32 atr_sz = ilog2(size) - 1;
926 	u32 val;
927 
928 	if (index == 0)
929 		val = PCIE_CONFIG_INTERFACE;
930 	else
931 		val = PCIE_TX_RX_INTERFACE;
932 
933 	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
934 	       ATR0_AXI4_SLV0_TRSL_PARAM);
935 
936 	val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) |
937 			    ATR_IMPL_ENABLE;
938 	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
939 	       ATR0_AXI4_SLV0_SRCADDR_PARAM);
940 
941 	val = upper_32_bits(axi_addr);
942 	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
943 	       ATR0_AXI4_SLV0_SRC_ADDR);
944 
945 	val = lower_32_bits(pci_addr);
946 	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
947 	       ATR0_AXI4_SLV0_TRSL_ADDR_LSB);
948 
949 	val = upper_32_bits(pci_addr);
950 	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
951 	       ATR0_AXI4_SLV0_TRSL_ADDR_UDW);
952 
953 	val = readl(bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
954 	val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT);
955 	writel(val, bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
956 	writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR);
957 }
958 
959 static int mc_pcie_setup_windows(struct platform_device *pdev,
960 				 struct mc_pcie *port)
961 {
962 	void __iomem *bridge_base_addr =
963 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
964 	struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
965 	struct resource_entry *entry;
966 	u64 pci_addr;
967 	u32 index = 1;
968 
969 	resource_list_for_each_entry(entry, &bridge->windows) {
970 		if (resource_type(entry->res) == IORESOURCE_MEM) {
971 			pci_addr = entry->res->start - entry->offset;
972 			mc_pcie_setup_window(bridge_base_addr, index,
973 					     entry->res->start, pci_addr,
974 					     resource_size(entry->res));
975 			index++;
976 		}
977 	}
978 
979 	return 0;
980 }
981 
982 static int mc_platform_init(struct pci_config_window *cfg)
983 {
984 	struct device *dev = cfg->parent;
985 	struct platform_device *pdev = to_platform_device(dev);
986 	struct mc_pcie *port;
987 	void __iomem *bridge_base_addr;
988 	void __iomem *ctrl_base_addr;
989 	int ret;
990 	int irq;
991 	int i, intx_irq, msi_irq, event_irq;
992 	u32 val;
993 	int err;
994 
995 	port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
996 	if (!port)
997 		return -ENOMEM;
998 	port->dev = dev;
999 
1000 	ret = mc_pcie_init_clks(dev);
1001 	if (ret) {
1002 		dev_err(dev, "failed to get clock resources, error %d\n", ret);
1003 		return -ENODEV;
1004 	}
1005 
1006 	port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1);
1007 	if (IS_ERR(port->axi_base_addr))
1008 		return PTR_ERR(port->axi_base_addr);
1009 
1010 	bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
1011 	ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;
1012 
1013 	port->msi.vector_phy = MSI_ADDR;
1014 	port->msi.num_vectors = MC_NUM_MSI_IRQS;
1015 	ret = mc_pcie_init_irq_domains(port);
1016 	if (ret) {
1017 		dev_err(dev, "failed creating IRQ domains\n");
1018 		return ret;
1019 	}
1020 
1021 	irq = platform_get_irq(pdev, 0);
1022 	if (irq < 0)
1023 		return -ENODEV;
1024 
1025 	for (i = 0; i < NUM_EVENTS; i++) {
1026 		event_irq = irq_create_mapping(port->event_domain, i);
1027 		if (!event_irq) {
1028 			dev_err(dev, "failed to map hwirq %d\n", i);
1029 			return -ENXIO;
1030 		}
1031 
1032 		err = devm_request_irq(dev, event_irq, mc_event_handler,
1033 				       0, event_cause[i].sym, port);
1034 		if (err) {
1035 			dev_err(dev, "failed to request IRQ %d\n", event_irq);
1036 			return err;
1037 		}
1038 	}
1039 
1040 	intx_irq = irq_create_mapping(port->event_domain,
1041 				      EVENT_LOCAL_PM_MSI_INT_INTX);
1042 	if (!intx_irq) {
1043 		dev_err(dev, "failed to map INTx interrupt\n");
1044 		return -ENXIO;
1045 	}
1046 
1047 	/* Plug the INTx chained handler */
1048 	irq_set_chained_handler_and_data(intx_irq, mc_handle_intx, port);
1049 
1050 	msi_irq = irq_create_mapping(port->event_domain,
1051 				     EVENT_LOCAL_PM_MSI_INT_MSI);
1052 	if (!msi_irq)
1053 		return -ENXIO;
1054 
1055 	/* Plug the MSI chained handler */
1056 	irq_set_chained_handler_and_data(msi_irq, mc_handle_msi, port);
1057 
1058 	/* Plug the main event chained handler */
1059 	irq_set_chained_handler_and_data(irq, mc_handle_event, port);
1060 
1061 	/* Hardware doesn't setup MSI by default */
1062 	mc_pcie_enable_msi(port, cfg->win);
1063 
1064 	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
1065 	val |= PM_MSI_INT_INTX_MASK;
1066 	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
1067 
1068 	writel_relaxed(val, ctrl_base_addr + ECC_CONTROL);
1069 
1070 	val = PCIE_EVENT_INT_L2_EXIT_INT |
1071 	      PCIE_EVENT_INT_HOTRST_EXIT_INT |
1072 	      PCIE_EVENT_INT_DLUP_EXIT_INT;
1073 	writel_relaxed(val, ctrl_base_addr + PCIE_EVENT_INT);
1074 
1075 	val = SEC_ERROR_INT_TX_RAM_SEC_ERR_INT |
1076 	      SEC_ERROR_INT_RX_RAM_SEC_ERR_INT |
1077 	      SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT |
1078 	      SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT;
1079 	writel_relaxed(val, ctrl_base_addr + SEC_ERROR_INT);
1080 	writel_relaxed(0, ctrl_base_addr + SEC_ERROR_INT_MASK);
1081 	writel_relaxed(0, ctrl_base_addr + SEC_ERROR_CNT);
1082 
1083 	val = DED_ERROR_INT_TX_RAM_DED_ERR_INT |
1084 	      DED_ERROR_INT_RX_RAM_DED_ERR_INT |
1085 	      DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT |
1086 	      DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT;
1087 	writel_relaxed(val, ctrl_base_addr + DED_ERROR_INT);
1088 	writel_relaxed(0, ctrl_base_addr + DED_ERROR_INT_MASK);
1089 	writel_relaxed(0, ctrl_base_addr + DED_ERROR_CNT);
1090 
1091 	writel_relaxed(0, bridge_base_addr + IMASK_HOST);
1092 	writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
1093 
1094 	/* Configure Address Translation Table 0 for PCIe config space */
1095 	mc_pcie_setup_window(bridge_base_addr, 0, cfg->res.start & 0xffffffff,
1096 			     cfg->res.start, resource_size(&cfg->res));
1097 
1098 	return mc_pcie_setup_windows(pdev, port);
1099 }
1100 
1101 static const struct pci_ecam_ops mc_ecam_ops = {
1102 	.init = mc_platform_init,
1103 	.pci_ops = {
1104 		.map_bus = pci_ecam_map_bus,
1105 		.read = pci_generic_config_read,
1106 		.write = pci_generic_config_write,
1107 	}
1108 };
1109 
1110 static const struct of_device_id mc_pcie_of_match[] = {
1111 	{
1112 		.compatible = "microchip,pcie-host-1.0",
1113 		.data = &mc_ecam_ops,
1114 	},
1115 	{},
1116 };
1117 
1118 MODULE_DEVICE_TABLE(of, mc_pcie_of_match)
1119 
1120 static struct platform_driver mc_pcie_driver = {
1121 	.probe = pci_host_common_probe,
1122 	.driver = {
1123 		.name = "microchip-pcie",
1124 		.of_match_table = mc_pcie_of_match,
1125 		.suppress_bind_attrs = true,
1126 	},
1127 };
1128 
1129 builtin_platform_driver(mc_pcie_driver);
1130 MODULE_LICENSE("GPL");
1131 MODULE_DESCRIPTION("Microchip PCIe host controller driver");
1132 MODULE_AUTHOR("Daire McNamara <daire.mcnamara@microchip.com>");
1133