Commit | Line | Data |
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0a8b8353 | 1 | /* |
2 | * intel_pmc_ipc.c: Driver for the Intel PMC IPC mechanism | |
3 | * | |
4 | * (C) Copyright 2014-2015 Intel Corporation | |
5 | * | |
6 | * This driver is based on Intel SCU IPC driver(intel_scu_opc.c) by | |
7 | * Sreedhara DS <sreedhara.ds@intel.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; version 2 | |
12 | * of the License. | |
13 | * | |
14 | * PMC running in ARC processor communicates with other entity running in IA | |
15 | * core through IPC mechanism which in turn messaging between IA core ad PMC. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/pm.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/platform_device.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/pm_qos.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/bitops.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/atomic.h> | |
32 | #include <linux/notifier.h> | |
33 | #include <linux/suspend.h> | |
34 | #include <linux/acpi.h> | |
35 | #include <asm/intel_pmc_ipc.h> | |
420b54de | 36 | #include <linux/platform_data/itco_wdt.h> |
0a8b8353 | 37 | |
38 | /* | |
39 | * IPC registers | |
40 | * The IA write to IPC_CMD command register triggers an interrupt to the ARC, | |
41 | * The ARC handles the interrupt and services it, writing optional data to | |
42 | * the IPC1 registers, updates the IPC_STS response register with the status. | |
43 | */ | |
44 | #define IPC_CMD 0x0 | |
45 | #define IPC_CMD_MSI 0x100 | |
46 | #define IPC_CMD_SIZE 16 | |
47 | #define IPC_CMD_SUBCMD 12 | |
48 | #define IPC_STATUS 0x04 | |
49 | #define IPC_STATUS_IRQ 0x4 | |
50 | #define IPC_STATUS_ERR 0x2 | |
51 | #define IPC_STATUS_BUSY 0x1 | |
52 | #define IPC_SPTR 0x08 | |
53 | #define IPC_DPTR 0x0C | |
54 | #define IPC_WRITE_BUFFER 0x80 | |
55 | #define IPC_READ_BUFFER 0x90 | |
56 | ||
57 | /* | |
58 | * 16-byte buffer for sending data associated with IPC command. | |
59 | */ | |
60 | #define IPC_DATA_BUFFER_SIZE 16 | |
61 | ||
62 | #define IPC_LOOP_CNT 3000000 | |
63 | #define IPC_MAX_SEC 3 | |
64 | ||
65 | #define IPC_TRIGGER_MODE_IRQ true | |
66 | ||
67 | /* exported resources from IFWI */ | |
68 | #define PLAT_RESOURCE_IPC_INDEX 0 | |
69 | #define PLAT_RESOURCE_IPC_SIZE 0x1000 | |
1a2f25d5 QZ |
70 | #define PLAT_RESOURCE_GCR_OFFSET 0x1008 |
71 | #define PLAT_RESOURCE_GCR_SIZE 0x4 | |
8cc7fb4a QZ |
72 | #define PLAT_RESOURCE_BIOS_DATA_INDEX 1 |
73 | #define PLAT_RESOURCE_BIOS_IFACE_INDEX 2 | |
48c19170 | 74 | #define PLAT_RESOURCE_TELEM_SSRAM_INDEX 3 |
8cc7fb4a QZ |
75 | #define PLAT_RESOURCE_ISP_DATA_INDEX 4 |
76 | #define PLAT_RESOURCE_ISP_IFACE_INDEX 5 | |
77 | #define PLAT_RESOURCE_GTD_DATA_INDEX 6 | |
78 | #define PLAT_RESOURCE_GTD_IFACE_INDEX 7 | |
0a8b8353 | 79 | #define PLAT_RESOURCE_ACPI_IO_INDEX 0 |
80 | ||
81 | /* | |
82 | * BIOS does not create an ACPI device for each PMC function, | |
83 | * but exports multiple resources from one ACPI device(IPC) for | |
84 | * multiple functions. This driver is responsible to create a | |
85 | * platform device and to export resources for those functions. | |
86 | */ | |
87 | #define TCO_DEVICE_NAME "iTCO_wdt" | |
88 | #define SMI_EN_OFFSET 0x30 | |
89 | #define SMI_EN_SIZE 4 | |
90 | #define TCO_BASE_OFFSET 0x60 | |
91 | #define TCO_REGS_SIZE 16 | |
92 | #define PUNIT_DEVICE_NAME "intel_punit_ipc" | |
48c19170 SKC |
93 | #define TELEMETRY_DEVICE_NAME "intel_telemetry" |
94 | #define TELEM_SSRAM_SIZE 240 | |
95 | #define TELEM_PMC_SSRAM_OFFSET 0x1B00 | |
96 | #define TELEM_PUNIT_SSRAM_OFFSET 0x1A00 | |
0a8b8353 | 97 | |
98 | static const int iTCO_version = 3; | |
99 | ||
100 | static struct intel_pmc_ipc_dev { | |
101 | struct device *dev; | |
102 | void __iomem *ipc_base; | |
103 | bool irq_mode; | |
104 | int irq; | |
105 | int cmd; | |
106 | struct completion cmd_complete; | |
107 | ||
108 | /* The following PMC BARs share the same ACPI device with the IPC */ | |
b78fb51b | 109 | resource_size_t acpi_io_base; |
0a8b8353 | 110 | int acpi_io_size; |
111 | struct platform_device *tco_dev; | |
112 | ||
113 | /* gcr */ | |
b78fb51b | 114 | resource_size_t gcr_base; |
0a8b8353 | 115 | int gcr_size; |
116 | ||
117 | /* punit */ | |
0a8b8353 | 118 | struct platform_device *punit_dev; |
48c19170 SKC |
119 | |
120 | /* Telemetry */ | |
121 | resource_size_t telem_pmc_ssram_base; | |
122 | resource_size_t telem_punit_ssram_base; | |
123 | int telem_pmc_ssram_size; | |
124 | int telem_punit_ssram_size; | |
125 | u8 telem_res_inval; | |
126 | struct platform_device *telemetry_dev; | |
0a8b8353 | 127 | } ipcdev; |
128 | ||
129 | static char *ipc_err_sources[] = { | |
130 | [IPC_ERR_NONE] = | |
131 | "no error", | |
132 | [IPC_ERR_CMD_NOT_SUPPORTED] = | |
133 | "command not supported", | |
134 | [IPC_ERR_CMD_NOT_SERVICED] = | |
135 | "command not serviced", | |
136 | [IPC_ERR_UNABLE_TO_SERVICE] = | |
137 | "unable to service", | |
138 | [IPC_ERR_CMD_INVALID] = | |
139 | "command invalid", | |
140 | [IPC_ERR_CMD_FAILED] = | |
141 | "command failed", | |
142 | [IPC_ERR_EMSECURITY] = | |
143 | "Invalid Battery", | |
144 | [IPC_ERR_UNSIGNEDKERNEL] = | |
145 | "Unsigned kernel", | |
146 | }; | |
147 | ||
148 | /* Prevent concurrent calls to the PMC */ | |
149 | static DEFINE_MUTEX(ipclock); | |
150 | ||
151 | static inline void ipc_send_command(u32 cmd) | |
152 | { | |
153 | ipcdev.cmd = cmd; | |
154 | if (ipcdev.irq_mode) { | |
155 | reinit_completion(&ipcdev.cmd_complete); | |
156 | cmd |= IPC_CMD_MSI; | |
157 | } | |
158 | writel(cmd, ipcdev.ipc_base + IPC_CMD); | |
159 | } | |
160 | ||
161 | static inline u32 ipc_read_status(void) | |
162 | { | |
163 | return readl(ipcdev.ipc_base + IPC_STATUS); | |
164 | } | |
165 | ||
166 | static inline void ipc_data_writel(u32 data, u32 offset) | |
167 | { | |
168 | writel(data, ipcdev.ipc_base + IPC_WRITE_BUFFER + offset); | |
169 | } | |
170 | ||
171 | static inline u8 ipc_data_readb(u32 offset) | |
172 | { | |
173 | return readb(ipcdev.ipc_base + IPC_READ_BUFFER + offset); | |
174 | } | |
175 | ||
176 | static inline u32 ipc_data_readl(u32 offset) | |
177 | { | |
178 | return readl(ipcdev.ipc_base + IPC_READ_BUFFER + offset); | |
179 | } | |
180 | ||
181 | static int intel_pmc_ipc_check_status(void) | |
182 | { | |
183 | int status; | |
184 | int ret = 0; | |
185 | ||
186 | if (ipcdev.irq_mode) { | |
187 | if (0 == wait_for_completion_timeout( | |
188 | &ipcdev.cmd_complete, IPC_MAX_SEC * HZ)) | |
189 | ret = -ETIMEDOUT; | |
190 | } else { | |
191 | int loop_count = IPC_LOOP_CNT; | |
192 | ||
193 | while ((ipc_read_status() & IPC_STATUS_BUSY) && --loop_count) | |
194 | udelay(1); | |
195 | if (loop_count == 0) | |
196 | ret = -ETIMEDOUT; | |
197 | } | |
198 | ||
199 | status = ipc_read_status(); | |
200 | if (ret == -ETIMEDOUT) { | |
201 | dev_err(ipcdev.dev, | |
202 | "IPC timed out, TS=0x%x, CMD=0x%x\n", | |
203 | status, ipcdev.cmd); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | if (status & IPC_STATUS_ERR) { | |
208 | int i; | |
209 | ||
210 | ret = -EIO; | |
211 | i = (status >> IPC_CMD_SIZE) & 0xFF; | |
212 | if (i < ARRAY_SIZE(ipc_err_sources)) | |
213 | dev_err(ipcdev.dev, | |
214 | "IPC failed: %s, STS=0x%x, CMD=0x%x\n", | |
215 | ipc_err_sources[i], status, ipcdev.cmd); | |
216 | else | |
217 | dev_err(ipcdev.dev, | |
218 | "IPC failed: unknown, STS=0x%x, CMD=0x%x\n", | |
219 | status, ipcdev.cmd); | |
220 | if ((i == IPC_ERR_UNSIGNEDKERNEL) || (i == IPC_ERR_EMSECURITY)) | |
221 | ret = -EACCES; | |
222 | } | |
223 | ||
224 | return ret; | |
225 | } | |
226 | ||
02941007 | 227 | /** |
228 | * intel_pmc_ipc_simple_command() - Simple IPC command | |
229 | * @cmd: IPC command code. | |
230 | * @sub: IPC command sub type. | |
231 | * | |
232 | * Send a simple IPC command to PMC when don't need to specify | |
233 | * input/output data and source/dest pointers. | |
234 | * | |
235 | * Return: an IPC error code or 0 on success. | |
0a8b8353 | 236 | */ |
237 | int intel_pmc_ipc_simple_command(int cmd, int sub) | |
238 | { | |
239 | int ret; | |
240 | ||
241 | mutex_lock(&ipclock); | |
242 | if (ipcdev.dev == NULL) { | |
243 | mutex_unlock(&ipclock); | |
244 | return -ENODEV; | |
245 | } | |
246 | ipc_send_command(sub << IPC_CMD_SUBCMD | cmd); | |
247 | ret = intel_pmc_ipc_check_status(); | |
248 | mutex_unlock(&ipclock); | |
249 | ||
250 | return ret; | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(intel_pmc_ipc_simple_command); | |
253 | ||
02941007 | 254 | /** |
255 | * intel_pmc_ipc_raw_cmd() - IPC command with data and pointers | |
256 | * @cmd: IPC command code. | |
257 | * @sub: IPC command sub type. | |
258 | * @in: input data of this IPC command. | |
259 | * @inlen: input data length in bytes. | |
260 | * @out: output data of this IPC command. | |
261 | * @outlen: output data length in dwords. | |
262 | * @sptr: data writing to SPTR register. | |
263 | * @dptr: data writing to DPTR register. | |
264 | * | |
265 | * Send an IPC command to PMC with input/output data and source/dest pointers. | |
266 | * | |
267 | * Return: an IPC error code or 0 on success. | |
0a8b8353 | 268 | */ |
269 | int intel_pmc_ipc_raw_cmd(u32 cmd, u32 sub, u8 *in, u32 inlen, u32 *out, | |
270 | u32 outlen, u32 dptr, u32 sptr) | |
271 | { | |
272 | u32 wbuf[4] = { 0 }; | |
273 | int ret; | |
274 | int i; | |
275 | ||
276 | if (inlen > IPC_DATA_BUFFER_SIZE || outlen > IPC_DATA_BUFFER_SIZE / 4) | |
277 | return -EINVAL; | |
278 | ||
279 | mutex_lock(&ipclock); | |
280 | if (ipcdev.dev == NULL) { | |
281 | mutex_unlock(&ipclock); | |
282 | return -ENODEV; | |
283 | } | |
284 | memcpy(wbuf, in, inlen); | |
285 | writel(dptr, ipcdev.ipc_base + IPC_DPTR); | |
286 | writel(sptr, ipcdev.ipc_base + IPC_SPTR); | |
287 | /* The input data register is 32bit register and inlen is in Byte */ | |
288 | for (i = 0; i < ((inlen + 3) / 4); i++) | |
289 | ipc_data_writel(wbuf[i], 4 * i); | |
290 | ipc_send_command((inlen << IPC_CMD_SIZE) | | |
291 | (sub << IPC_CMD_SUBCMD) | cmd); | |
292 | ret = intel_pmc_ipc_check_status(); | |
293 | if (!ret) { | |
294 | /* out is read from 32bit register and outlen is in 32bit */ | |
295 | for (i = 0; i < outlen; i++) | |
296 | *out++ = ipc_data_readl(4 * i); | |
297 | } | |
298 | mutex_unlock(&ipclock); | |
299 | ||
300 | return ret; | |
301 | } | |
302 | EXPORT_SYMBOL_GPL(intel_pmc_ipc_raw_cmd); | |
303 | ||
02941007 | 304 | /** |
305 | * intel_pmc_ipc_command() - IPC command with input/output data | |
306 | * @cmd: IPC command code. | |
307 | * @sub: IPC command sub type. | |
308 | * @in: input data of this IPC command. | |
309 | * @inlen: input data length in bytes. | |
310 | * @out: output data of this IPC command. | |
311 | * @outlen: output data length in dwords. | |
312 | * | |
313 | * Send an IPC command to PMC with input/output data. | |
314 | * | |
315 | * Return: an IPC error code or 0 on success. | |
0a8b8353 | 316 | */ |
317 | int intel_pmc_ipc_command(u32 cmd, u32 sub, u8 *in, u32 inlen, | |
318 | u32 *out, u32 outlen) | |
319 | { | |
320 | return intel_pmc_ipc_raw_cmd(cmd, sub, in, inlen, out, outlen, 0, 0); | |
321 | } | |
322 | EXPORT_SYMBOL_GPL(intel_pmc_ipc_command); | |
323 | ||
324 | static irqreturn_t ioc(int irq, void *dev_id) | |
325 | { | |
326 | int status; | |
327 | ||
328 | if (ipcdev.irq_mode) { | |
329 | status = ipc_read_status(); | |
330 | writel(status | IPC_STATUS_IRQ, ipcdev.ipc_base + IPC_STATUS); | |
331 | } | |
332 | complete(&ipcdev.cmd_complete); | |
333 | ||
334 | return IRQ_HANDLED; | |
335 | } | |
336 | ||
337 | static int ipc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
338 | { | |
339 | resource_size_t pci_resource; | |
340 | int ret; | |
341 | int len; | |
342 | ||
343 | ipcdev.dev = &pci_dev_get(pdev)->dev; | |
344 | ipcdev.irq_mode = IPC_TRIGGER_MODE_IRQ; | |
345 | ||
346 | ret = pci_enable_device(pdev); | |
347 | if (ret) | |
348 | return ret; | |
349 | ||
350 | ret = pci_request_regions(pdev, "intel_pmc_ipc"); | |
351 | if (ret) | |
352 | return ret; | |
353 | ||
354 | pci_resource = pci_resource_start(pdev, 0); | |
355 | len = pci_resource_len(pdev, 0); | |
356 | if (!pci_resource || !len) { | |
357 | dev_err(&pdev->dev, "Failed to get resource\n"); | |
358 | return -ENOMEM; | |
359 | } | |
360 | ||
361 | init_completion(&ipcdev.cmd_complete); | |
362 | ||
363 | if (request_irq(pdev->irq, ioc, 0, "intel_pmc_ipc", &ipcdev)) { | |
364 | dev_err(&pdev->dev, "Failed to request irq\n"); | |
365 | return -EBUSY; | |
366 | } | |
367 | ||
368 | ipcdev.ipc_base = ioremap_nocache(pci_resource, len); | |
369 | if (!ipcdev.ipc_base) { | |
370 | dev_err(&pdev->dev, "Failed to ioremap ipc base\n"); | |
371 | free_irq(pdev->irq, &ipcdev); | |
372 | ret = -ENOMEM; | |
373 | } | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
378 | static void ipc_pci_remove(struct pci_dev *pdev) | |
379 | { | |
380 | free_irq(pdev->irq, &ipcdev); | |
381 | pci_release_regions(pdev); | |
382 | pci_dev_put(pdev); | |
383 | iounmap(ipcdev.ipc_base); | |
384 | ipcdev.dev = NULL; | |
385 | } | |
386 | ||
387 | static const struct pci_device_id ipc_pci_ids[] = { | |
388 | {PCI_VDEVICE(INTEL, 0x0a94), 0}, | |
389 | {PCI_VDEVICE(INTEL, 0x1a94), 0}, | |
390 | { 0,} | |
391 | }; | |
392 | MODULE_DEVICE_TABLE(pci, ipc_pci_ids); | |
393 | ||
394 | static struct pci_driver ipc_pci_driver = { | |
395 | .name = "intel_pmc_ipc", | |
396 | .id_table = ipc_pci_ids, | |
397 | .probe = ipc_pci_probe, | |
398 | .remove = ipc_pci_remove, | |
399 | }; | |
400 | ||
401 | static ssize_t intel_pmc_ipc_simple_cmd_store(struct device *dev, | |
402 | struct device_attribute *attr, | |
403 | const char *buf, size_t count) | |
404 | { | |
405 | int subcmd; | |
406 | int cmd; | |
407 | int ret; | |
408 | ||
409 | ret = sscanf(buf, "%d %d", &cmd, &subcmd); | |
410 | if (ret != 2) { | |
411 | dev_err(dev, "Error args\n"); | |
412 | return -EINVAL; | |
413 | } | |
414 | ||
415 | ret = intel_pmc_ipc_simple_command(cmd, subcmd); | |
416 | if (ret) { | |
417 | dev_err(dev, "command %d error with %d\n", cmd, ret); | |
418 | return ret; | |
419 | } | |
420 | return (ssize_t)count; | |
421 | } | |
422 | ||
423 | static ssize_t intel_pmc_ipc_northpeak_store(struct device *dev, | |
424 | struct device_attribute *attr, | |
425 | const char *buf, size_t count) | |
426 | { | |
427 | unsigned long val; | |
428 | int subcmd; | |
429 | int ret; | |
430 | ||
431 | if (kstrtoul(buf, 0, &val)) | |
432 | return -EINVAL; | |
433 | ||
434 | if (val) | |
435 | subcmd = 1; | |
436 | else | |
437 | subcmd = 0; | |
438 | ret = intel_pmc_ipc_simple_command(PMC_IPC_NORTHPEAK_CTRL, subcmd); | |
439 | if (ret) { | |
440 | dev_err(dev, "command north %d error with %d\n", subcmd, ret); | |
441 | return ret; | |
442 | } | |
443 | return (ssize_t)count; | |
444 | } | |
445 | ||
446 | static DEVICE_ATTR(simplecmd, S_IWUSR, | |
447 | NULL, intel_pmc_ipc_simple_cmd_store); | |
448 | static DEVICE_ATTR(northpeak, S_IWUSR, | |
449 | NULL, intel_pmc_ipc_northpeak_store); | |
450 | ||
451 | static struct attribute *intel_ipc_attrs[] = { | |
452 | &dev_attr_northpeak.attr, | |
453 | &dev_attr_simplecmd.attr, | |
454 | NULL | |
455 | }; | |
456 | ||
457 | static const struct attribute_group intel_ipc_group = { | |
458 | .attrs = intel_ipc_attrs, | |
459 | }; | |
460 | ||
8cc7fb4a QZ |
461 | static struct resource punit_res_array[] = { |
462 | /* Punit BIOS */ | |
463 | { | |
464 | .flags = IORESOURCE_MEM, | |
465 | }, | |
466 | { | |
467 | .flags = IORESOURCE_MEM, | |
468 | }, | |
469 | /* Punit ISP */ | |
470 | { | |
471 | .flags = IORESOURCE_MEM, | |
472 | }, | |
473 | { | |
474 | .flags = IORESOURCE_MEM, | |
475 | }, | |
476 | /* Punit GTD */ | |
0a8b8353 | 477 | { |
478 | .flags = IORESOURCE_MEM, | |
479 | }, | |
480 | { | |
481 | .flags = IORESOURCE_MEM, | |
482 | }, | |
483 | }; | |
484 | ||
485 | #define TCO_RESOURCE_ACPI_IO 0 | |
486 | #define TCO_RESOURCE_SMI_EN_IO 1 | |
487 | #define TCO_RESOURCE_GCR_MEM 2 | |
488 | static struct resource tco_res[] = { | |
489 | /* ACPI - TCO */ | |
490 | { | |
491 | .flags = IORESOURCE_IO, | |
492 | }, | |
493 | /* ACPI - SMI */ | |
494 | { | |
495 | .flags = IORESOURCE_IO, | |
496 | }, | |
497 | /* GCS */ | |
498 | { | |
499 | .flags = IORESOURCE_MEM, | |
500 | }, | |
501 | }; | |
502 | ||
420b54de | 503 | static struct itco_wdt_platform_data tco_info = { |
0a8b8353 | 504 | .name = "Apollo Lake SoC", |
420b54de | 505 | .version = 3, |
0a8b8353 | 506 | }; |
507 | ||
48c19170 SKC |
508 | #define TELEMETRY_RESOURCE_PUNIT_SSRAM 0 |
509 | #define TELEMETRY_RESOURCE_PMC_SSRAM 1 | |
510 | static struct resource telemetry_res[] = { | |
511 | /*Telemetry*/ | |
512 | { | |
513 | .flags = IORESOURCE_MEM, | |
514 | }, | |
515 | { | |
516 | .flags = IORESOURCE_MEM, | |
517 | }, | |
518 | }; | |
519 | ||
0a8b8353 | 520 | static int ipc_create_punit_device(void) |
521 | { | |
522 | struct platform_device *pdev; | |
0a8b8353 | 523 | int ret; |
524 | ||
525 | pdev = platform_device_alloc(PUNIT_DEVICE_NAME, -1); | |
526 | if (!pdev) { | |
527 | dev_err(ipcdev.dev, "Failed to alloc punit platform device\n"); | |
528 | return -ENOMEM; | |
529 | } | |
530 | ||
531 | pdev->dev.parent = ipcdev.dev; | |
8cc7fb4a QZ |
532 | ret = platform_device_add_resources(pdev, punit_res_array, |
533 | ARRAY_SIZE(punit_res_array)); | |
0a8b8353 | 534 | if (ret) { |
535 | dev_err(ipcdev.dev, "Failed to add platform punit resources\n"); | |
536 | goto err; | |
537 | } | |
538 | ||
539 | ret = platform_device_add(pdev); | |
540 | if (ret) { | |
541 | dev_err(ipcdev.dev, "Failed to add punit platform device\n"); | |
542 | goto err; | |
543 | } | |
544 | ipcdev.punit_dev = pdev; | |
545 | ||
546 | return 0; | |
547 | err: | |
548 | platform_device_put(pdev); | |
549 | return ret; | |
550 | } | |
551 | ||
552 | static int ipc_create_tco_device(void) | |
553 | { | |
554 | struct platform_device *pdev; | |
555 | struct resource *res; | |
556 | int ret; | |
557 | ||
558 | pdev = platform_device_alloc(TCO_DEVICE_NAME, -1); | |
559 | if (!pdev) { | |
560 | dev_err(ipcdev.dev, "Failed to alloc tco platform device\n"); | |
561 | return -ENOMEM; | |
562 | } | |
563 | ||
564 | pdev->dev.parent = ipcdev.dev; | |
565 | ||
566 | res = tco_res + TCO_RESOURCE_ACPI_IO; | |
b78fb51b | 567 | res->start = ipcdev.acpi_io_base + TCO_BASE_OFFSET; |
0a8b8353 | 568 | res->end = res->start + TCO_REGS_SIZE - 1; |
569 | ||
570 | res = tco_res + TCO_RESOURCE_SMI_EN_IO; | |
b78fb51b | 571 | res->start = ipcdev.acpi_io_base + SMI_EN_OFFSET; |
0a8b8353 | 572 | res->end = res->start + SMI_EN_SIZE - 1; |
573 | ||
574 | res = tco_res + TCO_RESOURCE_GCR_MEM; | |
b78fb51b | 575 | res->start = ipcdev.gcr_base; |
0a8b8353 | 576 | res->end = res->start + ipcdev.gcr_size - 1; |
577 | ||
578 | ret = platform_device_add_resources(pdev, tco_res, ARRAY_SIZE(tco_res)); | |
579 | if (ret) { | |
580 | dev_err(ipcdev.dev, "Failed to add tco platform resources\n"); | |
581 | goto err; | |
582 | } | |
583 | ||
420b54de | 584 | ret = platform_device_add_data(pdev, &tco_info, sizeof(tco_info)); |
0a8b8353 | 585 | if (ret) { |
586 | dev_err(ipcdev.dev, "Failed to add tco platform data\n"); | |
587 | goto err; | |
588 | } | |
589 | ||
590 | ret = platform_device_add(pdev); | |
591 | if (ret) { | |
592 | dev_err(ipcdev.dev, "Failed to add tco platform device\n"); | |
593 | goto err; | |
594 | } | |
595 | ipcdev.tco_dev = pdev; | |
596 | ||
597 | return 0; | |
598 | err: | |
599 | platform_device_put(pdev); | |
600 | return ret; | |
601 | } | |
602 | ||
48c19170 SKC |
603 | static int ipc_create_telemetry_device(void) |
604 | { | |
605 | struct platform_device *pdev; | |
606 | struct resource *res; | |
607 | int ret; | |
608 | ||
609 | pdev = platform_device_alloc(TELEMETRY_DEVICE_NAME, -1); | |
610 | if (!pdev) { | |
611 | dev_err(ipcdev.dev, | |
612 | "Failed to allocate telemetry platform device\n"); | |
613 | return -ENOMEM; | |
614 | } | |
615 | ||
616 | pdev->dev.parent = ipcdev.dev; | |
617 | ||
618 | res = telemetry_res + TELEMETRY_RESOURCE_PUNIT_SSRAM; | |
619 | res->start = ipcdev.telem_punit_ssram_base; | |
620 | res->end = res->start + ipcdev.telem_punit_ssram_size - 1; | |
621 | ||
622 | res = telemetry_res + TELEMETRY_RESOURCE_PMC_SSRAM; | |
623 | res->start = ipcdev.telem_pmc_ssram_base; | |
624 | res->end = res->start + ipcdev.telem_pmc_ssram_size - 1; | |
625 | ||
626 | ret = platform_device_add_resources(pdev, telemetry_res, | |
627 | ARRAY_SIZE(telemetry_res)); | |
628 | if (ret) { | |
629 | dev_err(ipcdev.dev, | |
630 | "Failed to add telemetry platform resources\n"); | |
631 | goto err; | |
632 | } | |
633 | ||
634 | ret = platform_device_add(pdev); | |
635 | if (ret) { | |
636 | dev_err(ipcdev.dev, | |
637 | "Failed to add telemetry platform device\n"); | |
638 | goto err; | |
639 | } | |
640 | ipcdev.telemetry_dev = pdev; | |
641 | ||
642 | return 0; | |
643 | err: | |
644 | platform_device_put(pdev); | |
645 | return ret; | |
646 | } | |
647 | ||
0a8b8353 | 648 | static int ipc_create_pmc_devices(void) |
649 | { | |
650 | int ret; | |
651 | ||
652 | ret = ipc_create_tco_device(); | |
653 | if (ret) { | |
654 | dev_err(ipcdev.dev, "Failed to add tco platform device\n"); | |
655 | return ret; | |
656 | } | |
657 | ret = ipc_create_punit_device(); | |
658 | if (ret) { | |
659 | dev_err(ipcdev.dev, "Failed to add punit platform device\n"); | |
660 | platform_device_unregister(ipcdev.tco_dev); | |
661 | } | |
48c19170 SKC |
662 | |
663 | if (!ipcdev.telem_res_inval) { | |
664 | ret = ipc_create_telemetry_device(); | |
665 | if (ret) | |
666 | dev_warn(ipcdev.dev, | |
667 | "Failed to add telemetry platform device\n"); | |
668 | } | |
669 | ||
0a8b8353 | 670 | return ret; |
671 | } | |
672 | ||
673 | static int ipc_plat_get_res(struct platform_device *pdev) | |
674 | { | |
8cc7fb4a | 675 | struct resource *res, *punit_res; |
0a8b8353 | 676 | void __iomem *addr; |
677 | int size; | |
678 | ||
679 | res = platform_get_resource(pdev, IORESOURCE_IO, | |
680 | PLAT_RESOURCE_ACPI_IO_INDEX); | |
681 | if (!res) { | |
682 | dev_err(&pdev->dev, "Failed to get io resource\n"); | |
683 | return -ENXIO; | |
684 | } | |
685 | size = resource_size(res); | |
b78fb51b | 686 | ipcdev.acpi_io_base = res->start; |
0a8b8353 | 687 | ipcdev.acpi_io_size = size; |
8cc7fb4a | 688 | dev_info(&pdev->dev, "io res: %pR\n", res); |
0a8b8353 | 689 | |
8cc7fb4a | 690 | punit_res = punit_res_array; |
5d071633 | 691 | /* This is index 0 to cover BIOS data register */ |
0a8b8353 | 692 | res = platform_get_resource(pdev, IORESOURCE_MEM, |
8cc7fb4a | 693 | PLAT_RESOURCE_BIOS_DATA_INDEX); |
0a8b8353 | 694 | if (!res) { |
8cc7fb4a | 695 | dev_err(&pdev->dev, "Failed to get res of punit BIOS data\n"); |
0a8b8353 | 696 | return -ENXIO; |
697 | } | |
8cc7fb4a QZ |
698 | *punit_res = *res; |
699 | dev_info(&pdev->dev, "punit BIOS data res: %pR\n", res); | |
0a8b8353 | 700 | |
5d071633 | 701 | /* This is index 1 to cover BIOS interface register */ |
0a8b8353 | 702 | res = platform_get_resource(pdev, IORESOURCE_MEM, |
8cc7fb4a | 703 | PLAT_RESOURCE_BIOS_IFACE_INDEX); |
0a8b8353 | 704 | if (!res) { |
8cc7fb4a | 705 | dev_err(&pdev->dev, "Failed to get res of punit BIOS iface\n"); |
0a8b8353 | 706 | return -ENXIO; |
707 | } | |
8cc7fb4a QZ |
708 | *++punit_res = *res; |
709 | dev_info(&pdev->dev, "punit BIOS interface res: %pR\n", res); | |
710 | ||
5d071633 | 711 | /* This is index 2 to cover ISP data register, optional */ |
8cc7fb4a QZ |
712 | res = platform_get_resource(pdev, IORESOURCE_MEM, |
713 | PLAT_RESOURCE_ISP_DATA_INDEX); | |
5d071633 AL |
714 | ++punit_res; |
715 | if (res) { | |
716 | *punit_res = *res; | |
717 | dev_info(&pdev->dev, "punit ISP data res: %pR\n", res); | |
8cc7fb4a | 718 | } |
8cc7fb4a | 719 | |
5d071633 | 720 | /* This is index 3 to cover ISP interface register, optional */ |
8cc7fb4a QZ |
721 | res = platform_get_resource(pdev, IORESOURCE_MEM, |
722 | PLAT_RESOURCE_ISP_IFACE_INDEX); | |
5d071633 AL |
723 | ++punit_res; |
724 | if (res) { | |
725 | *punit_res = *res; | |
726 | dev_info(&pdev->dev, "punit ISP interface res: %pR\n", res); | |
8cc7fb4a | 727 | } |
8cc7fb4a | 728 | |
5d071633 | 729 | /* This is index 4 to cover GTD data register, optional */ |
8cc7fb4a QZ |
730 | res = platform_get_resource(pdev, IORESOURCE_MEM, |
731 | PLAT_RESOURCE_GTD_DATA_INDEX); | |
5d071633 AL |
732 | ++punit_res; |
733 | if (res) { | |
734 | *punit_res = *res; | |
735 | dev_info(&pdev->dev, "punit GTD data res: %pR\n", res); | |
8cc7fb4a | 736 | } |
8cc7fb4a | 737 | |
5d071633 | 738 | /* This is index 5 to cover GTD interface register, optional */ |
8cc7fb4a QZ |
739 | res = platform_get_resource(pdev, IORESOURCE_MEM, |
740 | PLAT_RESOURCE_GTD_IFACE_INDEX); | |
5d071633 AL |
741 | ++punit_res; |
742 | if (res) { | |
743 | *punit_res = *res; | |
744 | dev_info(&pdev->dev, "punit GTD interface res: %pR\n", res); | |
8cc7fb4a | 745 | } |
0a8b8353 | 746 | |
747 | res = platform_get_resource(pdev, IORESOURCE_MEM, | |
748 | PLAT_RESOURCE_IPC_INDEX); | |
749 | if (!res) { | |
750 | dev_err(&pdev->dev, "Failed to get ipc resource\n"); | |
751 | return -ENXIO; | |
752 | } | |
753 | size = PLAT_RESOURCE_IPC_SIZE; | |
754 | if (!request_mem_region(res->start, size, pdev->name)) { | |
755 | dev_err(&pdev->dev, "Failed to request ipc resource\n"); | |
756 | return -EBUSY; | |
757 | } | |
758 | addr = ioremap_nocache(res->start, size); | |
759 | if (!addr) { | |
760 | dev_err(&pdev->dev, "I/O memory remapping failed\n"); | |
761 | release_mem_region(res->start, size); | |
762 | return -ENOMEM; | |
763 | } | |
764 | ipcdev.ipc_base = addr; | |
765 | ||
1a2f25d5 | 766 | ipcdev.gcr_base = res->start + PLAT_RESOURCE_GCR_OFFSET; |
0a8b8353 | 767 | ipcdev.gcr_size = PLAT_RESOURCE_GCR_SIZE; |
8cc7fb4a | 768 | dev_info(&pdev->dev, "ipc res: %pR\n", res); |
0a8b8353 | 769 | |
48c19170 SKC |
770 | ipcdev.telem_res_inval = 0; |
771 | res = platform_get_resource(pdev, IORESOURCE_MEM, | |
772 | PLAT_RESOURCE_TELEM_SSRAM_INDEX); | |
773 | if (!res) { | |
774 | dev_err(&pdev->dev, "Failed to get telemetry ssram resource\n"); | |
775 | ipcdev.telem_res_inval = 1; | |
776 | } else { | |
777 | ipcdev.telem_punit_ssram_base = res->start + | |
778 | TELEM_PUNIT_SSRAM_OFFSET; | |
779 | ipcdev.telem_punit_ssram_size = TELEM_SSRAM_SIZE; | |
780 | ipcdev.telem_pmc_ssram_base = res->start + | |
781 | TELEM_PMC_SSRAM_OFFSET; | |
782 | ipcdev.telem_pmc_ssram_size = TELEM_SSRAM_SIZE; | |
783 | dev_info(&pdev->dev, "telemetry ssram res: %pR\n", res); | |
784 | } | |
785 | ||
0a8b8353 | 786 | return 0; |
787 | } | |
788 | ||
789 | #ifdef CONFIG_ACPI | |
790 | static const struct acpi_device_id ipc_acpi_ids[] = { | |
791 | { "INT34D2", 0}, | |
792 | { } | |
793 | }; | |
794 | MODULE_DEVICE_TABLE(acpi, ipc_acpi_ids); | |
795 | #endif | |
796 | ||
797 | static int ipc_plat_probe(struct platform_device *pdev) | |
798 | { | |
799 | struct resource *res; | |
800 | int ret; | |
801 | ||
802 | ipcdev.dev = &pdev->dev; | |
803 | ipcdev.irq_mode = IPC_TRIGGER_MODE_IRQ; | |
804 | init_completion(&ipcdev.cmd_complete); | |
805 | ||
806 | ipcdev.irq = platform_get_irq(pdev, 0); | |
807 | if (ipcdev.irq < 0) { | |
808 | dev_err(&pdev->dev, "Failed to get irq\n"); | |
809 | return -EINVAL; | |
810 | } | |
811 | ||
812 | ret = ipc_plat_get_res(pdev); | |
813 | if (ret) { | |
814 | dev_err(&pdev->dev, "Failed to request resource\n"); | |
815 | return ret; | |
816 | } | |
817 | ||
818 | ret = ipc_create_pmc_devices(); | |
819 | if (ret) { | |
820 | dev_err(&pdev->dev, "Failed to create pmc devices\n"); | |
821 | goto err_device; | |
822 | } | |
823 | ||
1f1ae997 QZ |
824 | if (request_irq(ipcdev.irq, ioc, IRQF_NO_SUSPEND, |
825 | "intel_pmc_ipc", &ipcdev)) { | |
0a8b8353 | 826 | dev_err(&pdev->dev, "Failed to request irq\n"); |
827 | ret = -EBUSY; | |
828 | goto err_irq; | |
829 | } | |
830 | ||
831 | ret = sysfs_create_group(&pdev->dev.kobj, &intel_ipc_group); | |
832 | if (ret) { | |
833 | dev_err(&pdev->dev, "Failed to create sysfs group %d\n", | |
834 | ret); | |
835 | goto err_sys; | |
836 | } | |
837 | ||
838 | return 0; | |
839 | err_sys: | |
840 | free_irq(ipcdev.irq, &ipcdev); | |
841 | err_irq: | |
842 | platform_device_unregister(ipcdev.tco_dev); | |
843 | platform_device_unregister(ipcdev.punit_dev); | |
48c19170 | 844 | platform_device_unregister(ipcdev.telemetry_dev); |
0a8b8353 | 845 | err_device: |
846 | iounmap(ipcdev.ipc_base); | |
847 | res = platform_get_resource(pdev, IORESOURCE_MEM, | |
848 | PLAT_RESOURCE_IPC_INDEX); | |
849 | if (res) | |
850 | release_mem_region(res->start, PLAT_RESOURCE_IPC_SIZE); | |
851 | return ret; | |
852 | } | |
853 | ||
854 | static int ipc_plat_remove(struct platform_device *pdev) | |
855 | { | |
856 | struct resource *res; | |
857 | ||
858 | sysfs_remove_group(&pdev->dev.kobj, &intel_ipc_group); | |
859 | free_irq(ipcdev.irq, &ipcdev); | |
860 | platform_device_unregister(ipcdev.tco_dev); | |
861 | platform_device_unregister(ipcdev.punit_dev); | |
48c19170 | 862 | platform_device_unregister(ipcdev.telemetry_dev); |
0a8b8353 | 863 | iounmap(ipcdev.ipc_base); |
864 | res = platform_get_resource(pdev, IORESOURCE_MEM, | |
865 | PLAT_RESOURCE_IPC_INDEX); | |
866 | if (res) | |
867 | release_mem_region(res->start, PLAT_RESOURCE_IPC_SIZE); | |
868 | ipcdev.dev = NULL; | |
869 | return 0; | |
870 | } | |
871 | ||
872 | static struct platform_driver ipc_plat_driver = { | |
873 | .remove = ipc_plat_remove, | |
874 | .probe = ipc_plat_probe, | |
875 | .driver = { | |
876 | .name = "pmc-ipc-plat", | |
877 | .acpi_match_table = ACPI_PTR(ipc_acpi_ids), | |
878 | }, | |
879 | }; | |
880 | ||
881 | static int __init intel_pmc_ipc_init(void) | |
882 | { | |
883 | int ret; | |
884 | ||
885 | ret = platform_driver_register(&ipc_plat_driver); | |
886 | if (ret) { | |
887 | pr_err("Failed to register PMC ipc platform driver\n"); | |
888 | return ret; | |
889 | } | |
890 | ret = pci_register_driver(&ipc_pci_driver); | |
891 | if (ret) { | |
892 | pr_err("Failed to register PMC ipc pci driver\n"); | |
893 | platform_driver_unregister(&ipc_plat_driver); | |
894 | return ret; | |
895 | } | |
896 | return ret; | |
897 | } | |
898 | ||
899 | static void __exit intel_pmc_ipc_exit(void) | |
900 | { | |
901 | pci_unregister_driver(&ipc_pci_driver); | |
902 | platform_driver_unregister(&ipc_plat_driver); | |
903 | } | |
904 | ||
905 | MODULE_AUTHOR("Zha Qipeng <qipeng.zha@intel.com>"); | |
906 | MODULE_DESCRIPTION("Intel PMC IPC driver"); | |
907 | MODULE_LICENSE("GPL"); | |
908 | ||
909 | /* Some modules are dependent on this, so init earlier */ | |
910 | fs_initcall(intel_pmc_ipc_init); | |
911 | module_exit(intel_pmc_ipc_exit); |