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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
251struct event_map {
252 u32 reg_mask;
253 u32 event_bit;
254};
255
256struct 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
265struct mc_port {
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
274struct cause {
275 const char *sym;
276 const char *str;
277};
278
279static 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
304static 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
310static 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
317static 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
324static 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
344static 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
383static char poss_clks[][5] = { "fic0", "fic1", "fic2", "fic3" };
384
385static void mc_pcie_enable_msi(struct mc_port *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
406static void mc_handle_msi(struct irq_desc *desc)
407{
408 struct mc_port *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 u32 virq;
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 virq = irq_find_mapping(msi->dev_domain, bit);
422 if (virq)
423 generic_handle_irq(virq);
424 else
425 dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
426 bit);
427 }
428 }
429}
430
431static void mc_msi_bottom_irq_ack(struct irq_data *data)
432{
433 struct mc_port *port = irq_data_get_irq_chip_data(data);
434 void __iomem *bridge_base_addr =
435 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
436 u32 bitpos = data->hwirq;
437 unsigned long status;
438
439 writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
440 status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
441 if (!status)
442 writel_relaxed(BIT(PM_MSI_INT_MSI_SHIFT),
443 bridge_base_addr + ISTATUS_LOCAL);
444}
445
446static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
447{
448 struct mc_port *port = irq_data_get_irq_chip_data(data);
449 phys_addr_t addr = port->msi.vector_phy;
450
451 msg->address_lo = lower_32_bits(addr);
452 msg->address_hi = upper_32_bits(addr);
453 msg->data = data->hwirq;
454
455 dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
456 (int)data->hwirq, msg->address_hi, msg->address_lo);
457}
458
459static int mc_msi_set_affinity(struct irq_data *irq_data,
460 const struct cpumask *mask, bool force)
461{
462 return -EINVAL;
463}
464
465static struct irq_chip mc_msi_bottom_irq_chip = {
466 .name = "Microchip MSI",
467 .irq_ack = mc_msi_bottom_irq_ack,
468 .irq_compose_msi_msg = mc_compose_msi_msg,
469 .irq_set_affinity = mc_msi_set_affinity,
470};
471
472static int mc_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
473 unsigned int nr_irqs, void *args)
474{
475 struct mc_port *port = domain->host_data;
476 struct mc_msi *msi = &port->msi;
477 void __iomem *bridge_base_addr =
478 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
479 unsigned long bit;
480 u32 val;
481
482 mutex_lock(&msi->lock);
483 bit = find_first_zero_bit(msi->used, msi->num_vectors);
484 if (bit >= msi->num_vectors) {
485 mutex_unlock(&msi->lock);
486 return -ENOSPC;
487 }
488
489 set_bit(bit, msi->used);
490
491 irq_domain_set_info(domain, virq, bit, &mc_msi_bottom_irq_chip,
492 domain->host_data, handle_edge_irq, NULL, NULL);
493
494 /* Enable MSI interrupts */
495 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
496 val |= PM_MSI_INT_MSI_MASK;
497 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
498
499 mutex_unlock(&msi->lock);
500
501 return 0;
502}
503
504static void mc_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
505 unsigned int nr_irqs)
506{
507 struct irq_data *d = irq_domain_get_irq_data(domain, virq);
508 struct mc_port *port = irq_data_get_irq_chip_data(d);
509 struct mc_msi *msi = &port->msi;
510
511 mutex_lock(&msi->lock);
512
513 if (test_bit(d->hwirq, msi->used))
514 __clear_bit(d->hwirq, msi->used);
515 else
516 dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
517
518 mutex_unlock(&msi->lock);
519}
520
521static const struct irq_domain_ops msi_domain_ops = {
522 .alloc = mc_irq_msi_domain_alloc,
523 .free = mc_irq_msi_domain_free,
524};
525
526static struct irq_chip mc_msi_irq_chip = {
527 .name = "Microchip PCIe MSI",
528 .irq_ack = irq_chip_ack_parent,
529 .irq_mask = pci_msi_mask_irq,
530 .irq_unmask = pci_msi_unmask_irq,
531};
532
533static struct msi_domain_info mc_msi_domain_info = {
534 .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
535 MSI_FLAG_PCI_MSIX),
536 .chip = &mc_msi_irq_chip,
537};
538
539static int mc_allocate_msi_domains(struct mc_port *port)
540{
541 struct device *dev = port->dev;
542 struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
543 struct mc_msi *msi = &port->msi;
544
545 mutex_init(&port->msi.lock);
546
547 msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
548 &msi_domain_ops, port);
549 if (!msi->dev_domain) {
550 dev_err(dev, "failed to create IRQ domain\n");
551 return -ENOMEM;
552 }
553
554 msi->msi_domain = pci_msi_create_irq_domain(fwnode, &mc_msi_domain_info,
555 msi->dev_domain);
556 if (!msi->msi_domain) {
557 dev_err(dev, "failed to create MSI domain\n");
558 irq_domain_remove(msi->dev_domain);
559 return -ENOMEM;
560 }
561
562 return 0;
563}
564
565static void mc_handle_intx(struct irq_desc *desc)
566{
567 struct mc_port *port = irq_desc_get_handler_data(desc);
568 struct device *dev = port->dev;
569 void __iomem *bridge_base_addr =
570 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
571 unsigned long status;
572 u32 bit;
573 u32 virq;
574
575 status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
576 if (status & PM_MSI_INT_INTX_MASK) {
577 status &= PM_MSI_INT_INTX_MASK;
578 status >>= PM_MSI_INT_INTX_SHIFT;
579 for_each_set_bit(bit, &status, PCI_NUM_INTX) {
580 virq = irq_find_mapping(port->intx_domain, bit);
581 if (virq)
582 generic_handle_irq(virq);
583 else
584 dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
585 bit);
586 }
587 }
588}
589
590static void mc_ack_intx_irq(struct irq_data *data)
591{
592 struct mc_port *port = irq_data_get_irq_chip_data(data);
593 void __iomem *bridge_base_addr =
594 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
595 u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
596
597 writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
598}
599
600static void mc_mask_intx_irq(struct irq_data *data)
601{
602 struct mc_port *port = irq_data_get_irq_chip_data(data);
603 void __iomem *bridge_base_addr =
604 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
605 unsigned long flags;
606 u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
607 u32 val;
608
609 raw_spin_lock_irqsave(&port->lock, flags);
610 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
611 val &= ~mask;
612 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
613 raw_spin_unlock_irqrestore(&port->lock, flags);
614}
615
616static void mc_unmask_intx_irq(struct irq_data *data)
617{
618 struct mc_port *port = irq_data_get_irq_chip_data(data);
619 void __iomem *bridge_base_addr =
620 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
621 unsigned long flags;
622 u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
623 u32 val;
624
625 raw_spin_lock_irqsave(&port->lock, flags);
626 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
627 val |= mask;
628 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
629 raw_spin_unlock_irqrestore(&port->lock, flags);
630}
631
632static struct irq_chip mc_intx_irq_chip = {
633 .name = "Microchip PCIe INTx",
634 .irq_ack = mc_ack_intx_irq,
635 .irq_mask = mc_mask_intx_irq,
636 .irq_unmask = mc_unmask_intx_irq,
637};
638
639static int mc_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
640 irq_hw_number_t hwirq)
641{
642 irq_set_chip_and_handler(irq, &mc_intx_irq_chip, handle_level_irq);
643 irq_set_chip_data(irq, domain->host_data);
644
645 return 0;
646}
647
648static const struct irq_domain_ops intx_domain_ops = {
649 .map = mc_pcie_intx_map,
650};
651
652static inline u32 reg_to_event(u32 reg, struct event_map field)
653{
654 return (reg & field.reg_mask) ? BIT(field.event_bit) : 0;
655}
656
657static u32 pcie_events(void __iomem *addr)
658{
659 u32 reg = readl_relaxed(addr);
660 u32 val = 0;
661 int i;
662
663 for (i = 0; i < ARRAY_SIZE(pcie_event_to_event); i++)
664 val |= reg_to_event(reg, pcie_event_to_event[i]);
665
666 return val;
667}
668
669static u32 sec_errors(void __iomem *addr)
670{
671 u32 reg = readl_relaxed(addr);
672 u32 val = 0;
673 int i;
674
675 for (i = 0; i < ARRAY_SIZE(sec_error_to_event); i++)
676 val |= reg_to_event(reg, sec_error_to_event[i]);
677
678 return val;
679}
680
681static u32 ded_errors(void __iomem *addr)
682{
683 u32 reg = readl_relaxed(addr);
684 u32 val = 0;
685 int i;
686
687 for (i = 0; i < ARRAY_SIZE(ded_error_to_event); i++)
688 val |= reg_to_event(reg, ded_error_to_event[i]);
689
690 return val;
691}
692
693static u32 local_events(void __iomem *addr)
694{
695 u32 reg = readl_relaxed(addr);
696 u32 val = 0;
697 int i;
698
699 for (i = 0; i < ARRAY_SIZE(local_status_to_event); i++)
700 val |= reg_to_event(reg, local_status_to_event[i]);
701
702 return val;
703}
704
705static u32 get_events(struct mc_port *port)
706{
707 void __iomem *bridge_base_addr =
708 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
709 void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;
710 u32 events = 0;
711
712 events |= pcie_events(ctrl_base_addr + PCIE_EVENT_INT);
713 events |= sec_errors(ctrl_base_addr + SEC_ERROR_INT);
714 events |= ded_errors(ctrl_base_addr + DED_ERROR_INT);
715 events |= local_events(bridge_base_addr + ISTATUS_LOCAL);
716
717 return events;
718}
719
720static irqreturn_t mc_event_handler(int irq, void *dev_id)
721{
722 struct mc_port *port = dev_id;
723 struct device *dev = port->dev;
724 struct irq_data *data;
725
726 data = irq_domain_get_irq_data(port->event_domain, irq);
727
728 if (event_cause[data->hwirq].str)
729 dev_err_ratelimited(dev, "%s\n", event_cause[data->hwirq].str);
730 else
731 dev_err_ratelimited(dev, "bad event IRQ %ld\n", data->hwirq);
732
733 return IRQ_HANDLED;
734}
735
736static void mc_handle_event(struct irq_desc *desc)
737{
738 struct mc_port *port = irq_desc_get_handler_data(desc);
739 unsigned long events;
740 u32 bit;
741 struct irq_chip *chip = irq_desc_get_chip(desc);
742
743 chained_irq_enter(chip, desc);
744
745 events = get_events(port);
746
747 for_each_set_bit(bit, &events, NUM_EVENTS)
748 generic_handle_irq(irq_find_mapping(port->event_domain, bit));
749
750 chained_irq_exit(chip, desc);
751}
752
753static void mc_ack_event_irq(struct irq_data *data)
754{
755 struct mc_port *port = irq_data_get_irq_chip_data(data);
756 u32 event = data->hwirq;
757 void __iomem *addr;
758 u32 mask;
759
760 addr = port->axi_base_addr + event_descs[event].base +
761 event_descs[event].offset;
762 mask = event_descs[event].mask;
763 mask |= event_descs[event].enb_mask;
764
765 writel_relaxed(mask, addr);
766}
767
768static void mc_mask_event_irq(struct irq_data *data)
769{
770 struct mc_port *port = irq_data_get_irq_chip_data(data);
771 u32 event = data->hwirq;
772 void __iomem *addr;
773 u32 mask;
774 u32 val;
775
776 addr = port->axi_base_addr + event_descs[event].base +
777 event_descs[event].mask_offset;
778 mask = event_descs[event].mask;
779 if (event_descs[event].enb_mask) {
780 mask <<= PCIE_EVENT_INT_ENB_SHIFT;
781 mask &= PCIE_EVENT_INT_ENB_MASK;
782 }
783
784 if (!event_descs[event].mask_high)
785 mask = ~mask;
786
787 raw_spin_lock(&port->lock);
788 val = readl_relaxed(addr);
789 if (event_descs[event].mask_high)
790 val |= mask;
791 else
792 val &= mask;
793
794 writel_relaxed(val, addr);
795 raw_spin_unlock(&port->lock);
796}
797
798static void mc_unmask_event_irq(struct irq_data *data)
799{
800 struct mc_port *port = irq_data_get_irq_chip_data(data);
801 u32 event = data->hwirq;
802 void __iomem *addr;
803 u32 mask;
804 u32 val;
805
806 addr = port->axi_base_addr + event_descs[event].base +
807 event_descs[event].mask_offset;
808 mask = event_descs[event].mask;
809
810 if (event_descs[event].enb_mask)
811 mask <<= PCIE_EVENT_INT_ENB_SHIFT;
812
813 if (event_descs[event].mask_high)
814 mask = ~mask;
815
816 if (event_descs[event].enb_mask)
817 mask &= PCIE_EVENT_INT_ENB_MASK;
818
819 raw_spin_lock(&port->lock);
820 val = readl_relaxed(addr);
821 if (event_descs[event].mask_high)
822 val &= mask;
823 else
824 val |= mask;
825 writel_relaxed(val, addr);
826 raw_spin_unlock(&port->lock);
827}
828
829static struct irq_chip mc_event_irq_chip = {
830 .name = "Microchip PCIe EVENT",
831 .irq_ack = mc_ack_event_irq,
832 .irq_mask = mc_mask_event_irq,
833 .irq_unmask = mc_unmask_event_irq,
834};
835
836static int mc_pcie_event_map(struct irq_domain *domain, unsigned int irq,
837 irq_hw_number_t hwirq)
838{
839 irq_set_chip_and_handler(irq, &mc_event_irq_chip, handle_level_irq);
840 irq_set_chip_data(irq, domain->host_data);
841
842 return 0;
843}
844
845static const struct irq_domain_ops event_domain_ops = {
846 .map = mc_pcie_event_map,
847};
848
849static inline struct clk *mc_pcie_init_clk(struct device *dev, const char *id)
850{
851 struct clk *clk;
852 int ret;
853
854 clk = devm_clk_get_optional(dev, id);
855 if (IS_ERR(clk))
856 return clk;
857 if (!clk)
858 return clk;
859
860 ret = clk_prepare_enable(clk);
861 if (ret)
862 return ERR_PTR(ret);
863
864 devm_add_action_or_reset(dev, (void (*) (void *))clk_disable_unprepare,
865 clk);
866
867 return clk;
868}
869
870static int mc_pcie_init_clks(struct device *dev)
871{
872 int i;
873 struct clk *fic;
874
875 /*
876 * PCIe may be clocked via Fabric Interface using between 1 and 4
877 * clocks. Scan DT for clocks and enable them if present
878 */
879 for (i = 0; i < ARRAY_SIZE(poss_clks); i++) {
880 fic = mc_pcie_init_clk(dev, poss_clks[i]);
881 if (IS_ERR(fic))
882 return PTR_ERR(fic);
883 }
884
885 return 0;
886}
887
888static int mc_pcie_init_irq_domains(struct mc_port *port)
889{
890 struct device *dev = port->dev;
891 struct device_node *node = dev->of_node;
892 struct device_node *pcie_intc_node;
893
894 /* Setup INTx */
895 pcie_intc_node = of_get_next_child(node, NULL);
896 if (!pcie_intc_node) {
897 dev_err(dev, "failed to find PCIe Intc node\n");
898 return -EINVAL;
899 }
900
901 port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS,
902 &event_domain_ops, port);
903 if (!port->event_domain) {
904 dev_err(dev, "failed to get event domain\n");
905 return -ENOMEM;
906 }
907
908 irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS);
909
910 port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
911 &intx_domain_ops, port);
912 if (!port->intx_domain) {
913 dev_err(dev, "failed to get an INTx IRQ domain\n");
914 return -ENOMEM;
915 }
916
917 irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED);
918
919 of_node_put(pcie_intc_node);
920 raw_spin_lock_init(&port->lock);
921
922 return mc_allocate_msi_domains(port);
923}
924
925static void mc_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
926 phys_addr_t axi_addr, phys_addr_t pci_addr,
927 size_t size)
928{
929 u32 atr_sz = ilog2(size) - 1;
930 u32 val;
931
932 if (index == 0)
933 val = PCIE_CONFIG_INTERFACE;
934 else
935 val = PCIE_TX_RX_INTERFACE;
936
937 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
938 ATR0_AXI4_SLV0_TRSL_PARAM);
939
940 val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) |
941 ATR_IMPL_ENABLE;
942 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
943 ATR0_AXI4_SLV0_SRCADDR_PARAM);
944
945 val = upper_32_bits(axi_addr);
946 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
947 ATR0_AXI4_SLV0_SRC_ADDR);
948
949 val = lower_32_bits(pci_addr);
950 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
951 ATR0_AXI4_SLV0_TRSL_ADDR_LSB);
952
953 val = upper_32_bits(pci_addr);
954 writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
955 ATR0_AXI4_SLV0_TRSL_ADDR_UDW);
956
957 val = readl(bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
958 val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT);
959 writel(val, bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
960 writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR);
961}
962
963static int mc_pcie_setup_windows(struct platform_device *pdev,
964 struct mc_port *port)
965{
966 void __iomem *bridge_base_addr =
967 port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
968 struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
969 struct resource_entry *entry;
970 u64 pci_addr;
971 u32 index = 1;
972
973 resource_list_for_each_entry(entry, &bridge->windows) {
974 if (resource_type(entry->res) == IORESOURCE_MEM) {
975 pci_addr = entry->res->start - entry->offset;
976 mc_pcie_setup_window(bridge_base_addr, index,
977 entry->res->start, pci_addr,
978 resource_size(entry->res));
979 index++;
980 }
981 }
982
983 return 0;
984}
985
986static int mc_platform_init(struct pci_config_window *cfg)
987{
988 struct device *dev = cfg->parent;
989 struct platform_device *pdev = to_platform_device(dev);
990 struct mc_port *port;
991 void __iomem *bridge_base_addr;
992 void __iomem *ctrl_base_addr;
993 int ret;
994 int irq;
995 int i, intx_irq, msi_irq, event_irq;
996 u32 val;
997 int err;
998
999 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
1000 if (!port)
1001 return -ENOMEM;
1002 port->dev = dev;
1003
1004 ret = mc_pcie_init_clks(dev);
1005 if (ret) {
1006 dev_err(dev, "failed to get clock resources, error %d\n", ret);
1007 return -ENODEV;
1008 }
1009
1010 port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1);
1011 if (IS_ERR(port->axi_base_addr))
1012 return PTR_ERR(port->axi_base_addr);
1013
1014 bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
1015 ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;
1016
1017 port->msi.vector_phy = MSI_ADDR;
1018 port->msi.num_vectors = MC_NUM_MSI_IRQS;
1019 ret = mc_pcie_init_irq_domains(port);
1020 if (ret) {
1021 dev_err(dev, "failed creating IRQ domains\n");
1022 return ret;
1023 }
1024
1025 irq = platform_get_irq(pdev, 0);
1026 if (irq < 0)
1027 return -ENODEV;
1028
1029 for (i = 0; i < NUM_EVENTS; i++) {
1030 event_irq = irq_create_mapping(port->event_domain, i);
1031 if (!event_irq) {
1032 dev_err(dev, "failed to map hwirq %d\n", i);
1033 return -ENXIO;
1034 }
1035
1036 err = devm_request_irq(dev, event_irq, mc_event_handler,
1037 0, event_cause[i].sym, port);
1038 if (err) {
1039 dev_err(dev, "failed to request IRQ %d\n", event_irq);
1040 return err;
1041 }
1042 }
1043
1044 intx_irq = irq_create_mapping(port->event_domain,
1045 EVENT_LOCAL_PM_MSI_INT_INTX);
1046 if (!intx_irq) {
1047 dev_err(dev, "failed to map INTx interrupt\n");
1048 return -ENXIO;
1049 }
1050
1051 /* Plug the INTx chained handler */
1052 irq_set_chained_handler_and_data(intx_irq, mc_handle_intx, port);
1053
1054 msi_irq = irq_create_mapping(port->event_domain,
1055 EVENT_LOCAL_PM_MSI_INT_MSI);
1056 if (!msi_irq)
1057 return -ENXIO;
1058
1059 /* Plug the MSI chained handler */
1060 irq_set_chained_handler_and_data(msi_irq, mc_handle_msi, port);
1061
1062 /* Plug the main event chained handler */
1063 irq_set_chained_handler_and_data(irq, mc_handle_event, port);
1064
1065 /* Hardware doesn't setup MSI by default */
1066 mc_pcie_enable_msi(port, cfg->win);
1067
1068 val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
1069 val |= PM_MSI_INT_INTX_MASK;
1070 writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
1071
1072 writel_relaxed(val, ctrl_base_addr + ECC_CONTROL);
1073
1074 val = PCIE_EVENT_INT_L2_EXIT_INT |
1075 PCIE_EVENT_INT_HOTRST_EXIT_INT |
1076 PCIE_EVENT_INT_DLUP_EXIT_INT;
1077 writel_relaxed(val, ctrl_base_addr + PCIE_EVENT_INT);
1078
1079 val = SEC_ERROR_INT_TX_RAM_SEC_ERR_INT |
1080 SEC_ERROR_INT_RX_RAM_SEC_ERR_INT |
1081 SEC_ERROR_INT_PCIE2AXI_RAM_SEC_ERR_INT |
1082 SEC_ERROR_INT_AXI2PCIE_RAM_SEC_ERR_INT;
1083 writel_relaxed(val, ctrl_base_addr + SEC_ERROR_INT);
1084 writel_relaxed(0, ctrl_base_addr + SEC_ERROR_INT_MASK);
1085 writel_relaxed(0, ctrl_base_addr + SEC_ERROR_CNT);
1086
1087 val = DED_ERROR_INT_TX_RAM_DED_ERR_INT |
1088 DED_ERROR_INT_RX_RAM_DED_ERR_INT |
1089 DED_ERROR_INT_PCIE2AXI_RAM_DED_ERR_INT |
1090 DED_ERROR_INT_AXI2PCIE_RAM_DED_ERR_INT;
1091 writel_relaxed(val, ctrl_base_addr + DED_ERROR_INT);
1092 writel_relaxed(0, ctrl_base_addr + DED_ERROR_INT_MASK);
1093 writel_relaxed(0, ctrl_base_addr + DED_ERROR_CNT);
1094
1095 writel_relaxed(0, bridge_base_addr + IMASK_HOST);
1096 writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
1097
1098 /* Configure Address Translation Table 0 for PCIe config space */
1099 mc_pcie_setup_window(bridge_base_addr, 0, cfg->res.start & 0xffffffff,
1100 cfg->res.start, resource_size(&cfg->res));
1101
1102 return mc_pcie_setup_windows(pdev, port);
1103}
1104
1105static const struct pci_ecam_ops mc_ecam_ops = {
1106 .init = mc_platform_init,
1107 .pci_ops = {
1108 .map_bus = pci_ecam_map_bus,
1109 .read = pci_generic_config_read,
1110 .write = pci_generic_config_write,
1111 }
1112};
1113
1114static const struct of_device_id mc_pcie_of_match[] = {
1115 {
1116 .compatible = "microchip,pcie-host-1.0",
1117 .data = &mc_ecam_ops,
1118 },
1119 {},
1120};
1121
1122MODULE_DEVICE_TABLE(of, mc_pcie_of_match)
1123
1124static struct platform_driver mc_pcie_driver = {
1125 .probe = pci_host_common_probe,
1126 .driver = {
1127 .name = "microchip-pcie",
1128 .of_match_table = mc_pcie_of_match,
1129 .suppress_bind_attrs = true,
1130 },
1131};
1132
1133builtin_platform_driver(mc_pcie_driver);
1134MODULE_LICENSE("GPL");
1135MODULE_DESCRIPTION("Microchip PCIe host controller driver");
1136MODULE_AUTHOR("Daire McNamara <daire.mcnamara@microchip.com>");