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1e0a6014 | 1 | // SPDX-License-Identifier: GPL-2.0 |
aa276781 NM |
2 | /* |
3 | * Texas Instruments System Control Interface Protocol Driver | |
4 | * | |
5 | * Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/ | |
6 | * Nishanth Menon | |
aa276781 NM |
7 | */ |
8 | ||
9 | #define pr_fmt(fmt) "%s: " fmt, __func__ | |
10 | ||
11 | #include <linux/bitmap.h> | |
12 | #include <linux/debugfs.h> | |
13 | #include <linux/export.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/mailbox_client.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/of_device.h> | |
19 | #include <linux/semaphore.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/soc/ti/ti-msgmgr.h> | |
22 | #include <linux/soc/ti/ti_sci_protocol.h> | |
912cffb4 | 23 | #include <linux/reboot.h> |
aa276781 NM |
24 | |
25 | #include "ti_sci.h" | |
26 | ||
27 | /* List of all TI SCI devices active in system */ | |
28 | static LIST_HEAD(ti_sci_list); | |
29 | /* Protection for the entire list */ | |
30 | static DEFINE_MUTEX(ti_sci_list_mutex); | |
31 | ||
32 | /** | |
33 | * struct ti_sci_xfer - Structure representing a message flow | |
34 | * @tx_message: Transmit message | |
35 | * @rx_len: Receive message length | |
36 | * @xfer_buf: Preallocated buffer to store receive message | |
37 | * Since we work with request-ACK protocol, we can | |
38 | * reuse the same buffer for the rx path as we | |
39 | * use for the tx path. | |
40 | * @done: completion event | |
41 | */ | |
42 | struct ti_sci_xfer { | |
43 | struct ti_msgmgr_message tx_message; | |
44 | u8 rx_len; | |
45 | u8 *xfer_buf; | |
46 | struct completion done; | |
47 | }; | |
48 | ||
49 | /** | |
50 | * struct ti_sci_xfers_info - Structure to manage transfer information | |
51 | * @sem_xfer_count: Counting Semaphore for managing max simultaneous | |
52 | * Messages. | |
53 | * @xfer_block: Preallocated Message array | |
54 | * @xfer_alloc_table: Bitmap table for allocated messages. | |
55 | * Index of this bitmap table is also used for message | |
56 | * sequence identifier. | |
57 | * @xfer_lock: Protection for message allocation | |
58 | */ | |
59 | struct ti_sci_xfers_info { | |
60 | struct semaphore sem_xfer_count; | |
61 | struct ti_sci_xfer *xfer_block; | |
62 | unsigned long *xfer_alloc_table; | |
63 | /* protect transfer allocation */ | |
64 | spinlock_t xfer_lock; | |
65 | }; | |
66 | ||
9c19fb68 LV |
67 | /** |
68 | * struct ti_sci_rm_type_map - Structure representing TISCI Resource | |
69 | * management representation of dev_ids. | |
70 | * @dev_id: TISCI device ID | |
71 | * @type: Corresponding id as identified by TISCI RM. | |
72 | * | |
73 | * Note: This is used only as a work around for using RM range apis | |
74 | * for AM654 SoC. For future SoCs dev_id will be used as type | |
75 | * for RM range APIs. In order to maintain ABI backward compatibility | |
76 | * type is not being changed for AM654 SoC. | |
77 | */ | |
78 | struct ti_sci_rm_type_map { | |
79 | u32 dev_id; | |
80 | u16 type; | |
81 | }; | |
82 | ||
aa276781 NM |
83 | /** |
84 | * struct ti_sci_desc - Description of SoC integration | |
e69a3553 | 85 | * @default_host_id: Host identifier representing the compute entity |
aa276781 NM |
86 | * @max_rx_timeout_ms: Timeout for communication with SoC (in Milliseconds) |
87 | * @max_msgs: Maximum number of messages that can be pending | |
88 | * simultaneously in the system | |
89 | * @max_msg_size: Maximum size of data per message that can be handled. | |
9c19fb68 | 90 | * @rm_type_map: RM resource type mapping structure. |
aa276781 NM |
91 | */ |
92 | struct ti_sci_desc { | |
e69a3553 | 93 | u8 default_host_id; |
aa276781 NM |
94 | int max_rx_timeout_ms; |
95 | int max_msgs; | |
96 | int max_msg_size; | |
9c19fb68 | 97 | struct ti_sci_rm_type_map *rm_type_map; |
aa276781 NM |
98 | }; |
99 | ||
100 | /** | |
101 | * struct ti_sci_info - Structure representing a TI SCI instance | |
102 | * @dev: Device pointer | |
103 | * @desc: SoC description for this instance | |
912cffb4 | 104 | * @nb: Reboot Notifier block |
aa276781 NM |
105 | * @d: Debugfs file entry |
106 | * @debug_region: Memory region where the debug message are available | |
107 | * @debug_region_size: Debug region size | |
108 | * @debug_buffer: Buffer allocated to copy debug messages. | |
109 | * @handle: Instance of TI SCI handle to send to clients. | |
110 | * @cl: Mailbox Client | |
111 | * @chan_tx: Transmit mailbox channel | |
112 | * @chan_rx: Receive mailbox channel | |
113 | * @minfo: Message info | |
114 | * @node: list head | |
e69a3553 | 115 | * @host_id: Host ID |
aa276781 NM |
116 | * @users: Number of users of this instance |
117 | */ | |
118 | struct ti_sci_info { | |
119 | struct device *dev; | |
912cffb4 | 120 | struct notifier_block nb; |
aa276781 NM |
121 | const struct ti_sci_desc *desc; |
122 | struct dentry *d; | |
123 | void __iomem *debug_region; | |
124 | char *debug_buffer; | |
125 | size_t debug_region_size; | |
126 | struct ti_sci_handle handle; | |
127 | struct mbox_client cl; | |
128 | struct mbox_chan *chan_tx; | |
129 | struct mbox_chan *chan_rx; | |
130 | struct ti_sci_xfers_info minfo; | |
131 | struct list_head node; | |
e69a3553 | 132 | u8 host_id; |
aa276781 NM |
133 | /* protected by ti_sci_list_mutex */ |
134 | int users; | |
912cffb4 | 135 | |
aa276781 NM |
136 | }; |
137 | ||
138 | #define cl_to_ti_sci_info(c) container_of(c, struct ti_sci_info, cl) | |
139 | #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle) | |
912cffb4 | 140 | #define reboot_to_ti_sci_info(n) container_of(n, struct ti_sci_info, nb) |
aa276781 NM |
141 | |
142 | #ifdef CONFIG_DEBUG_FS | |
143 | ||
144 | /** | |
145 | * ti_sci_debug_show() - Helper to dump the debug log | |
146 | * @s: sequence file pointer | |
147 | * @unused: unused. | |
148 | * | |
149 | * Return: 0 | |
150 | */ | |
151 | static int ti_sci_debug_show(struct seq_file *s, void *unused) | |
152 | { | |
153 | struct ti_sci_info *info = s->private; | |
154 | ||
155 | memcpy_fromio(info->debug_buffer, info->debug_region, | |
156 | info->debug_region_size); | |
157 | /* | |
158 | * We don't trust firmware to leave NULL terminated last byte (hence | |
159 | * we have allocated 1 extra 0 byte). Since we cannot guarantee any | |
160 | * specific data format for debug messages, We just present the data | |
161 | * in the buffer as is - we expect the messages to be self explanatory. | |
162 | */ | |
163 | seq_puts(s, info->debug_buffer); | |
164 | return 0; | |
165 | } | |
166 | ||
5953c887 YL |
167 | /* Provide the log file operations interface*/ |
168 | DEFINE_SHOW_ATTRIBUTE(ti_sci_debug); | |
aa276781 NM |
169 | |
170 | /** | |
171 | * ti_sci_debugfs_create() - Create log debug file | |
172 | * @pdev: platform device pointer | |
173 | * @info: Pointer to SCI entity information | |
174 | * | |
175 | * Return: 0 if all went fine, else corresponding error. | |
176 | */ | |
177 | static int ti_sci_debugfs_create(struct platform_device *pdev, | |
178 | struct ti_sci_info *info) | |
179 | { | |
180 | struct device *dev = &pdev->dev; | |
181 | struct resource *res; | |
182 | char debug_name[50] = "ti_sci_debug@"; | |
183 | ||
184 | /* Debug region is optional */ | |
185 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, | |
186 | "debug_messages"); | |
187 | info->debug_region = devm_ioremap_resource(dev, res); | |
188 | if (IS_ERR(info->debug_region)) | |
189 | return 0; | |
190 | info->debug_region_size = resource_size(res); | |
191 | ||
192 | info->debug_buffer = devm_kcalloc(dev, info->debug_region_size + 1, | |
193 | sizeof(char), GFP_KERNEL); | |
194 | if (!info->debug_buffer) | |
195 | return -ENOMEM; | |
196 | /* Setup NULL termination */ | |
197 | info->debug_buffer[info->debug_region_size] = 0; | |
198 | ||
199 | info->d = debugfs_create_file(strncat(debug_name, dev_name(dev), | |
76cefef8 AB |
200 | sizeof(debug_name) - |
201 | sizeof("ti_sci_debug@")), | |
aa276781 NM |
202 | 0444, NULL, info, &ti_sci_debug_fops); |
203 | if (IS_ERR(info->d)) | |
204 | return PTR_ERR(info->d); | |
205 | ||
206 | dev_dbg(dev, "Debug region => %p, size = %zu bytes, resource: %pr\n", | |
207 | info->debug_region, info->debug_region_size, res); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | /** | |
212 | * ti_sci_debugfs_destroy() - clean up log debug file | |
213 | * @pdev: platform device pointer | |
214 | * @info: Pointer to SCI entity information | |
215 | */ | |
216 | static void ti_sci_debugfs_destroy(struct platform_device *pdev, | |
217 | struct ti_sci_info *info) | |
218 | { | |
219 | if (IS_ERR(info->debug_region)) | |
220 | return; | |
221 | ||
222 | debugfs_remove(info->d); | |
223 | } | |
224 | #else /* CONFIG_DEBUG_FS */ | |
225 | static inline int ti_sci_debugfs_create(struct platform_device *dev, | |
226 | struct ti_sci_info *info) | |
227 | { | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static inline void ti_sci_debugfs_destroy(struct platform_device *dev, | |
232 | struct ti_sci_info *info) | |
233 | { | |
234 | } | |
235 | #endif /* CONFIG_DEBUG_FS */ | |
236 | ||
237 | /** | |
238 | * ti_sci_dump_header_dbg() - Helper to dump a message header. | |
239 | * @dev: Device pointer corresponding to the SCI entity | |
240 | * @hdr: pointer to header. | |
241 | */ | |
242 | static inline void ti_sci_dump_header_dbg(struct device *dev, | |
243 | struct ti_sci_msg_hdr *hdr) | |
244 | { | |
245 | dev_dbg(dev, "MSGHDR:type=0x%04x host=0x%02x seq=0x%02x flags=0x%08x\n", | |
246 | hdr->type, hdr->host, hdr->seq, hdr->flags); | |
247 | } | |
248 | ||
249 | /** | |
250 | * ti_sci_rx_callback() - mailbox client callback for receive messages | |
251 | * @cl: client pointer | |
252 | * @m: mailbox message | |
253 | * | |
254 | * Processes one received message to appropriate transfer information and | |
255 | * signals completion of the transfer. | |
256 | * | |
257 | * NOTE: This function will be invoked in IRQ context, hence should be | |
258 | * as optimal as possible. | |
259 | */ | |
260 | static void ti_sci_rx_callback(struct mbox_client *cl, void *m) | |
261 | { | |
262 | struct ti_sci_info *info = cl_to_ti_sci_info(cl); | |
263 | struct device *dev = info->dev; | |
264 | struct ti_sci_xfers_info *minfo = &info->minfo; | |
265 | struct ti_msgmgr_message *mbox_msg = m; | |
266 | struct ti_sci_msg_hdr *hdr = (struct ti_sci_msg_hdr *)mbox_msg->buf; | |
267 | struct ti_sci_xfer *xfer; | |
268 | u8 xfer_id; | |
269 | ||
270 | xfer_id = hdr->seq; | |
271 | ||
272 | /* | |
273 | * Are we even expecting this? | |
274 | * NOTE: barriers were implicit in locks used for modifying the bitmap | |
275 | */ | |
276 | if (!test_bit(xfer_id, minfo->xfer_alloc_table)) { | |
277 | dev_err(dev, "Message for %d is not expected!\n", xfer_id); | |
278 | return; | |
279 | } | |
280 | ||
281 | xfer = &minfo->xfer_block[xfer_id]; | |
282 | ||
283 | /* Is the message of valid length? */ | |
284 | if (mbox_msg->len > info->desc->max_msg_size) { | |
bd0fa74e | 285 | dev_err(dev, "Unable to handle %zu xfer(max %d)\n", |
aa276781 NM |
286 | mbox_msg->len, info->desc->max_msg_size); |
287 | ti_sci_dump_header_dbg(dev, hdr); | |
288 | return; | |
289 | } | |
290 | if (mbox_msg->len < xfer->rx_len) { | |
bd0fa74e | 291 | dev_err(dev, "Recv xfer %zu < expected %d length\n", |
aa276781 NM |
292 | mbox_msg->len, xfer->rx_len); |
293 | ti_sci_dump_header_dbg(dev, hdr); | |
294 | return; | |
295 | } | |
296 | ||
297 | ti_sci_dump_header_dbg(dev, hdr); | |
298 | /* Take a copy to the rx buffer.. */ | |
299 | memcpy(xfer->xfer_buf, mbox_msg->buf, xfer->rx_len); | |
300 | complete(&xfer->done); | |
301 | } | |
302 | ||
303 | /** | |
304 | * ti_sci_get_one_xfer() - Allocate one message | |
305 | * @info: Pointer to SCI entity information | |
306 | * @msg_type: Message type | |
307 | * @msg_flags: Flag to set for the message | |
308 | * @tx_message_size: transmit message size | |
309 | * @rx_message_size: receive message size | |
310 | * | |
311 | * Helper function which is used by various command functions that are | |
312 | * exposed to clients of this driver for allocating a message traffic event. | |
313 | * | |
314 | * This function can sleep depending on pending requests already in the system | |
315 | * for the SCI entity. Further, this also holds a spinlock to maintain integrity | |
316 | * of internal data structures. | |
317 | * | |
318 | * Return: 0 if all went fine, else corresponding error. | |
319 | */ | |
320 | static struct ti_sci_xfer *ti_sci_get_one_xfer(struct ti_sci_info *info, | |
321 | u16 msg_type, u32 msg_flags, | |
322 | size_t tx_message_size, | |
323 | size_t rx_message_size) | |
324 | { | |
325 | struct ti_sci_xfers_info *minfo = &info->minfo; | |
326 | struct ti_sci_xfer *xfer; | |
327 | struct ti_sci_msg_hdr *hdr; | |
328 | unsigned long flags; | |
329 | unsigned long bit_pos; | |
330 | u8 xfer_id; | |
331 | int ret; | |
332 | int timeout; | |
333 | ||
334 | /* Ensure we have sane transfer sizes */ | |
335 | if (rx_message_size > info->desc->max_msg_size || | |
336 | tx_message_size > info->desc->max_msg_size || | |
337 | rx_message_size < sizeof(*hdr) || tx_message_size < sizeof(*hdr)) | |
338 | return ERR_PTR(-ERANGE); | |
339 | ||
340 | /* | |
341 | * Ensure we have only controlled number of pending messages. | |
342 | * Ideally, we might just have to wait a single message, be | |
343 | * conservative and wait 5 times that.. | |
344 | */ | |
345 | timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms) * 5; | |
346 | ret = down_timeout(&minfo->sem_xfer_count, timeout); | |
347 | if (ret < 0) | |
348 | return ERR_PTR(ret); | |
349 | ||
350 | /* Keep the locked section as small as possible */ | |
351 | spin_lock_irqsave(&minfo->xfer_lock, flags); | |
352 | bit_pos = find_first_zero_bit(minfo->xfer_alloc_table, | |
353 | info->desc->max_msgs); | |
354 | set_bit(bit_pos, minfo->xfer_alloc_table); | |
355 | spin_unlock_irqrestore(&minfo->xfer_lock, flags); | |
356 | ||
357 | /* | |
358 | * We already ensured in probe that we can have max messages that can | |
359 | * fit in hdr.seq - NOTE: this improves access latencies | |
360 | * to predictable O(1) access, BUT, it opens us to risk if | |
361 | * remote misbehaves with corrupted message sequence responses. | |
362 | * If that happens, we are going to be messed up anyways.. | |
363 | */ | |
364 | xfer_id = (u8)bit_pos; | |
365 | ||
366 | xfer = &minfo->xfer_block[xfer_id]; | |
367 | ||
368 | hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
369 | xfer->tx_message.len = tx_message_size; | |
370 | xfer->rx_len = (u8)rx_message_size; | |
371 | ||
372 | reinit_completion(&xfer->done); | |
373 | ||
374 | hdr->seq = xfer_id; | |
375 | hdr->type = msg_type; | |
e69a3553 | 376 | hdr->host = info->host_id; |
aa276781 NM |
377 | hdr->flags = msg_flags; |
378 | ||
379 | return xfer; | |
380 | } | |
381 | ||
382 | /** | |
383 | * ti_sci_put_one_xfer() - Release a message | |
384 | * @minfo: transfer info pointer | |
385 | * @xfer: message that was reserved by ti_sci_get_one_xfer | |
386 | * | |
387 | * This holds a spinlock to maintain integrity of internal data structures. | |
388 | */ | |
389 | static void ti_sci_put_one_xfer(struct ti_sci_xfers_info *minfo, | |
390 | struct ti_sci_xfer *xfer) | |
391 | { | |
392 | unsigned long flags; | |
393 | struct ti_sci_msg_hdr *hdr; | |
394 | u8 xfer_id; | |
395 | ||
396 | hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
397 | xfer_id = hdr->seq; | |
398 | ||
399 | /* | |
400 | * Keep the locked section as small as possible | |
401 | * NOTE: we might escape with smp_mb and no lock here.. | |
402 | * but just be conservative and symmetric. | |
403 | */ | |
404 | spin_lock_irqsave(&minfo->xfer_lock, flags); | |
405 | clear_bit(xfer_id, minfo->xfer_alloc_table); | |
406 | spin_unlock_irqrestore(&minfo->xfer_lock, flags); | |
407 | ||
408 | /* Increment the count for the next user to get through */ | |
409 | up(&minfo->sem_xfer_count); | |
410 | } | |
411 | ||
412 | /** | |
413 | * ti_sci_do_xfer() - Do one transfer | |
414 | * @info: Pointer to SCI entity information | |
415 | * @xfer: Transfer to initiate and wait for response | |
416 | * | |
417 | * Return: -ETIMEDOUT in case of no response, if transmit error, | |
418 | * return corresponding error, else if all goes well, | |
419 | * return 0. | |
420 | */ | |
421 | static inline int ti_sci_do_xfer(struct ti_sci_info *info, | |
422 | struct ti_sci_xfer *xfer) | |
423 | { | |
424 | int ret; | |
425 | int timeout; | |
426 | struct device *dev = info->dev; | |
427 | ||
428 | ret = mbox_send_message(info->chan_tx, &xfer->tx_message); | |
429 | if (ret < 0) | |
430 | return ret; | |
431 | ||
432 | ret = 0; | |
433 | ||
434 | /* And we wait for the response. */ | |
435 | timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms); | |
436 | if (!wait_for_completion_timeout(&xfer->done, timeout)) { | |
595f3a9d | 437 | dev_err(dev, "Mbox timedout in resp(caller: %pS)\n", |
aa276781 NM |
438 | (void *)_RET_IP_); |
439 | ret = -ETIMEDOUT; | |
440 | } | |
441 | /* | |
442 | * NOTE: we might prefer not to need the mailbox ticker to manage the | |
443 | * transfer queueing since the protocol layer queues things by itself. | |
444 | * Unfortunately, we have to kick the mailbox framework after we have | |
445 | * received our message. | |
446 | */ | |
447 | mbox_client_txdone(info->chan_tx, ret); | |
448 | ||
449 | return ret; | |
450 | } | |
451 | ||
452 | /** | |
453 | * ti_sci_cmd_get_revision() - command to get the revision of the SCI entity | |
454 | * @info: Pointer to SCI entity information | |
455 | * | |
456 | * Updates the SCI information in the internal data structure. | |
457 | * | |
458 | * Return: 0 if all went fine, else return appropriate error. | |
459 | */ | |
460 | static int ti_sci_cmd_get_revision(struct ti_sci_info *info) | |
461 | { | |
462 | struct device *dev = info->dev; | |
463 | struct ti_sci_handle *handle = &info->handle; | |
464 | struct ti_sci_version_info *ver = &handle->version; | |
465 | struct ti_sci_msg_resp_version *rev_info; | |
466 | struct ti_sci_xfer *xfer; | |
467 | int ret; | |
468 | ||
469 | /* No need to setup flags since it is expected to respond */ | |
470 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_VERSION, | |
471 | 0x0, sizeof(struct ti_sci_msg_hdr), | |
472 | sizeof(*rev_info)); | |
473 | if (IS_ERR(xfer)) { | |
474 | ret = PTR_ERR(xfer); | |
475 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
476 | return ret; | |
477 | } | |
478 | ||
479 | rev_info = (struct ti_sci_msg_resp_version *)xfer->xfer_buf; | |
480 | ||
481 | ret = ti_sci_do_xfer(info, xfer); | |
482 | if (ret) { | |
483 | dev_err(dev, "Mbox send fail %d\n", ret); | |
484 | goto fail; | |
485 | } | |
486 | ||
487 | ver->abi_major = rev_info->abi_major; | |
488 | ver->abi_minor = rev_info->abi_minor; | |
489 | ver->firmware_revision = rev_info->firmware_revision; | |
490 | strncpy(ver->firmware_description, rev_info->firmware_description, | |
491 | sizeof(ver->firmware_description)); | |
492 | ||
493 | fail: | |
494 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
495 | return ret; | |
496 | } | |
497 | ||
9e7d756d NM |
498 | /** |
499 | * ti_sci_is_response_ack() - Generic ACK/NACK message checkup | |
500 | * @r: pointer to response buffer | |
501 | * | |
502 | * Return: true if the response was an ACK, else returns false. | |
503 | */ | |
504 | static inline bool ti_sci_is_response_ack(void *r) | |
505 | { | |
506 | struct ti_sci_msg_hdr *hdr = r; | |
507 | ||
508 | return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false; | |
509 | } | |
510 | ||
511 | /** | |
512 | * ti_sci_set_device_state() - Set device state helper | |
513 | * @handle: pointer to TI SCI handle | |
514 | * @id: Device identifier | |
515 | * @flags: flags to setup for the device | |
516 | * @state: State to move the device to | |
517 | * | |
518 | * Return: 0 if all went well, else returns appropriate error value. | |
519 | */ | |
520 | static int ti_sci_set_device_state(const struct ti_sci_handle *handle, | |
521 | u32 id, u32 flags, u8 state) | |
522 | { | |
523 | struct ti_sci_info *info; | |
524 | struct ti_sci_msg_req_set_device_state *req; | |
525 | struct ti_sci_msg_hdr *resp; | |
526 | struct ti_sci_xfer *xfer; | |
527 | struct device *dev; | |
528 | int ret = 0; | |
529 | ||
530 | if (IS_ERR(handle)) | |
531 | return PTR_ERR(handle); | |
532 | if (!handle) | |
533 | return -EINVAL; | |
534 | ||
535 | info = handle_to_ti_sci_info(handle); | |
536 | dev = info->dev; | |
537 | ||
538 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_DEVICE_STATE, | |
539 | flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
540 | sizeof(*req), sizeof(*resp)); | |
541 | if (IS_ERR(xfer)) { | |
542 | ret = PTR_ERR(xfer); | |
543 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
544 | return ret; | |
545 | } | |
546 | req = (struct ti_sci_msg_req_set_device_state *)xfer->xfer_buf; | |
547 | req->id = id; | |
548 | req->state = state; | |
549 | ||
550 | ret = ti_sci_do_xfer(info, xfer); | |
551 | if (ret) { | |
552 | dev_err(dev, "Mbox send fail %d\n", ret); | |
553 | goto fail; | |
554 | } | |
555 | ||
556 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
557 | ||
558 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
559 | ||
560 | fail: | |
561 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
562 | ||
563 | return ret; | |
564 | } | |
565 | ||
566 | /** | |
567 | * ti_sci_get_device_state() - Get device state helper | |
568 | * @handle: Handle to the device | |
569 | * @id: Device Identifier | |
570 | * @clcnt: Pointer to Context Loss Count | |
571 | * @resets: pointer to resets | |
572 | * @p_state: pointer to p_state | |
573 | * @c_state: pointer to c_state | |
574 | * | |
575 | * Return: 0 if all went fine, else return appropriate error. | |
576 | */ | |
577 | static int ti_sci_get_device_state(const struct ti_sci_handle *handle, | |
578 | u32 id, u32 *clcnt, u32 *resets, | |
579 | u8 *p_state, u8 *c_state) | |
580 | { | |
581 | struct ti_sci_info *info; | |
582 | struct ti_sci_msg_req_get_device_state *req; | |
583 | struct ti_sci_msg_resp_get_device_state *resp; | |
584 | struct ti_sci_xfer *xfer; | |
585 | struct device *dev; | |
586 | int ret = 0; | |
587 | ||
588 | if (IS_ERR(handle)) | |
589 | return PTR_ERR(handle); | |
590 | if (!handle) | |
591 | return -EINVAL; | |
592 | ||
593 | if (!clcnt && !resets && !p_state && !c_state) | |
594 | return -EINVAL; | |
595 | ||
596 | info = handle_to_ti_sci_info(handle); | |
597 | dev = info->dev; | |
598 | ||
599 | /* Response is expected, so need of any flags */ | |
600 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_DEVICE_STATE, | |
601 | 0, sizeof(*req), sizeof(*resp)); | |
602 | if (IS_ERR(xfer)) { | |
603 | ret = PTR_ERR(xfer); | |
604 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
605 | return ret; | |
606 | } | |
607 | req = (struct ti_sci_msg_req_get_device_state *)xfer->xfer_buf; | |
608 | req->id = id; | |
609 | ||
610 | ret = ti_sci_do_xfer(info, xfer); | |
611 | if (ret) { | |
612 | dev_err(dev, "Mbox send fail %d\n", ret); | |
613 | goto fail; | |
614 | } | |
615 | ||
616 | resp = (struct ti_sci_msg_resp_get_device_state *)xfer->xfer_buf; | |
617 | if (!ti_sci_is_response_ack(resp)) { | |
618 | ret = -ENODEV; | |
619 | goto fail; | |
620 | } | |
621 | ||
622 | if (clcnt) | |
623 | *clcnt = resp->context_loss_count; | |
624 | if (resets) | |
625 | *resets = resp->resets; | |
626 | if (p_state) | |
627 | *p_state = resp->programmed_state; | |
628 | if (c_state) | |
629 | *c_state = resp->current_state; | |
630 | fail: | |
631 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
632 | ||
633 | return ret; | |
634 | } | |
635 | ||
636 | /** | |
637 | * ti_sci_cmd_get_device() - command to request for device managed by TISCI | |
638 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
639 | * @id: Device Identifier | |
640 | * | |
641 | * Request for the device - NOTE: the client MUST maintain integrity of | |
642 | * usage count by balancing get_device with put_device. No refcounting is | |
643 | * managed by driver for that purpose. | |
644 | * | |
645 | * NOTE: The request is for exclusive access for the processor. | |
646 | * | |
647 | * Return: 0 if all went fine, else return appropriate error. | |
648 | */ | |
649 | static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id) | |
650 | { | |
651 | return ti_sci_set_device_state(handle, id, | |
652 | MSG_FLAG_DEVICE_EXCLUSIVE, | |
653 | MSG_DEVICE_SW_STATE_ON); | |
654 | } | |
655 | ||
656 | /** | |
657 | * ti_sci_cmd_idle_device() - Command to idle a device managed by TISCI | |
658 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
659 | * @id: Device Identifier | |
660 | * | |
661 | * Request for the device - NOTE: the client MUST maintain integrity of | |
662 | * usage count by balancing get_device with put_device. No refcounting is | |
663 | * managed by driver for that purpose. | |
664 | * | |
665 | * Return: 0 if all went fine, else return appropriate error. | |
666 | */ | |
667 | static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id) | |
668 | { | |
669 | return ti_sci_set_device_state(handle, id, | |
670 | MSG_FLAG_DEVICE_EXCLUSIVE, | |
671 | MSG_DEVICE_SW_STATE_RETENTION); | |
672 | } | |
673 | ||
674 | /** | |
675 | * ti_sci_cmd_put_device() - command to release a device managed by TISCI | |
676 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
677 | * @id: Device Identifier | |
678 | * | |
679 | * Request for the device - NOTE: the client MUST maintain integrity of | |
680 | * usage count by balancing get_device with put_device. No refcounting is | |
681 | * managed by driver for that purpose. | |
682 | * | |
683 | * Return: 0 if all went fine, else return appropriate error. | |
684 | */ | |
685 | static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id) | |
686 | { | |
687 | return ti_sci_set_device_state(handle, id, | |
688 | 0, MSG_DEVICE_SW_STATE_AUTO_OFF); | |
689 | } | |
690 | ||
691 | /** | |
692 | * ti_sci_cmd_dev_is_valid() - Is the device valid | |
693 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
694 | * @id: Device Identifier | |
695 | * | |
696 | * Return: 0 if all went fine and the device ID is valid, else return | |
697 | * appropriate error. | |
698 | */ | |
699 | static int ti_sci_cmd_dev_is_valid(const struct ti_sci_handle *handle, u32 id) | |
700 | { | |
701 | u8 unused; | |
702 | ||
703 | /* check the device state which will also tell us if the ID is valid */ | |
704 | return ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &unused); | |
705 | } | |
706 | ||
707 | /** | |
708 | * ti_sci_cmd_dev_get_clcnt() - Get context loss counter | |
709 | * @handle: Pointer to TISCI handle | |
710 | * @id: Device Identifier | |
711 | * @count: Pointer to Context Loss counter to populate | |
712 | * | |
713 | * Return: 0 if all went fine, else return appropriate error. | |
714 | */ | |
715 | static int ti_sci_cmd_dev_get_clcnt(const struct ti_sci_handle *handle, u32 id, | |
716 | u32 *count) | |
717 | { | |
718 | return ti_sci_get_device_state(handle, id, count, NULL, NULL, NULL); | |
719 | } | |
720 | ||
721 | /** | |
722 | * ti_sci_cmd_dev_is_idle() - Check if the device is requested to be idle | |
723 | * @handle: Pointer to TISCI handle | |
724 | * @id: Device Identifier | |
725 | * @r_state: true if requested to be idle | |
726 | * | |
727 | * Return: 0 if all went fine, else return appropriate error. | |
728 | */ | |
729 | static int ti_sci_cmd_dev_is_idle(const struct ti_sci_handle *handle, u32 id, | |
730 | bool *r_state) | |
731 | { | |
732 | int ret; | |
733 | u8 state; | |
734 | ||
735 | if (!r_state) | |
736 | return -EINVAL; | |
737 | ||
738 | ret = ti_sci_get_device_state(handle, id, NULL, NULL, &state, NULL); | |
739 | if (ret) | |
740 | return ret; | |
741 | ||
742 | *r_state = (state == MSG_DEVICE_SW_STATE_RETENTION); | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | /** | |
748 | * ti_sci_cmd_dev_is_stop() - Check if the device is requested to be stopped | |
749 | * @handle: Pointer to TISCI handle | |
750 | * @id: Device Identifier | |
751 | * @r_state: true if requested to be stopped | |
752 | * @curr_state: true if currently stopped. | |
753 | * | |
754 | * Return: 0 if all went fine, else return appropriate error. | |
755 | */ | |
756 | static int ti_sci_cmd_dev_is_stop(const struct ti_sci_handle *handle, u32 id, | |
757 | bool *r_state, bool *curr_state) | |
758 | { | |
759 | int ret; | |
760 | u8 p_state, c_state; | |
761 | ||
762 | if (!r_state && !curr_state) | |
763 | return -EINVAL; | |
764 | ||
765 | ret = | |
766 | ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); | |
767 | if (ret) | |
768 | return ret; | |
769 | ||
770 | if (r_state) | |
771 | *r_state = (p_state == MSG_DEVICE_SW_STATE_AUTO_OFF); | |
772 | if (curr_state) | |
773 | *curr_state = (c_state == MSG_DEVICE_HW_STATE_OFF); | |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
778 | /** | |
779 | * ti_sci_cmd_dev_is_on() - Check if the device is requested to be ON | |
780 | * @handle: Pointer to TISCI handle | |
781 | * @id: Device Identifier | |
782 | * @r_state: true if requested to be ON | |
783 | * @curr_state: true if currently ON and active | |
784 | * | |
785 | * Return: 0 if all went fine, else return appropriate error. | |
786 | */ | |
787 | static int ti_sci_cmd_dev_is_on(const struct ti_sci_handle *handle, u32 id, | |
788 | bool *r_state, bool *curr_state) | |
789 | { | |
790 | int ret; | |
791 | u8 p_state, c_state; | |
792 | ||
793 | if (!r_state && !curr_state) | |
794 | return -EINVAL; | |
795 | ||
796 | ret = | |
797 | ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); | |
798 | if (ret) | |
799 | return ret; | |
800 | ||
801 | if (r_state) | |
802 | *r_state = (p_state == MSG_DEVICE_SW_STATE_ON); | |
803 | if (curr_state) | |
804 | *curr_state = (c_state == MSG_DEVICE_HW_STATE_ON); | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | /** | |
810 | * ti_sci_cmd_dev_is_trans() - Check if the device is currently transitioning | |
811 | * @handle: Pointer to TISCI handle | |
812 | * @id: Device Identifier | |
813 | * @curr_state: true if currently transitioning. | |
814 | * | |
815 | * Return: 0 if all went fine, else return appropriate error. | |
816 | */ | |
817 | static int ti_sci_cmd_dev_is_trans(const struct ti_sci_handle *handle, u32 id, | |
818 | bool *curr_state) | |
819 | { | |
820 | int ret; | |
821 | u8 state; | |
822 | ||
823 | if (!curr_state) | |
824 | return -EINVAL; | |
825 | ||
826 | ret = ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &state); | |
827 | if (ret) | |
828 | return ret; | |
829 | ||
830 | *curr_state = (state == MSG_DEVICE_HW_STATE_TRANS); | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
835 | /** | |
836 | * ti_sci_cmd_set_device_resets() - command to set resets for device managed | |
837 | * by TISCI | |
838 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
839 | * @id: Device Identifier | |
840 | * @reset_state: Device specific reset bit field | |
841 | * | |
842 | * Return: 0 if all went fine, else return appropriate error. | |
843 | */ | |
844 | static int ti_sci_cmd_set_device_resets(const struct ti_sci_handle *handle, | |
845 | u32 id, u32 reset_state) | |
846 | { | |
847 | struct ti_sci_info *info; | |
848 | struct ti_sci_msg_req_set_device_resets *req; | |
849 | struct ti_sci_msg_hdr *resp; | |
850 | struct ti_sci_xfer *xfer; | |
851 | struct device *dev; | |
852 | int ret = 0; | |
853 | ||
854 | if (IS_ERR(handle)) | |
855 | return PTR_ERR(handle); | |
856 | if (!handle) | |
857 | return -EINVAL; | |
858 | ||
859 | info = handle_to_ti_sci_info(handle); | |
860 | dev = info->dev; | |
861 | ||
862 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_DEVICE_RESETS, | |
863 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
864 | sizeof(*req), sizeof(*resp)); | |
865 | if (IS_ERR(xfer)) { | |
866 | ret = PTR_ERR(xfer); | |
867 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
868 | return ret; | |
869 | } | |
870 | req = (struct ti_sci_msg_req_set_device_resets *)xfer->xfer_buf; | |
871 | req->id = id; | |
872 | req->resets = reset_state; | |
873 | ||
874 | ret = ti_sci_do_xfer(info, xfer); | |
875 | if (ret) { | |
876 | dev_err(dev, "Mbox send fail %d\n", ret); | |
877 | goto fail; | |
878 | } | |
879 | ||
880 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
881 | ||
882 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
883 | ||
884 | fail: | |
885 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
886 | ||
887 | return ret; | |
888 | } | |
889 | ||
890 | /** | |
891 | * ti_sci_cmd_get_device_resets() - Get reset state for device managed | |
892 | * by TISCI | |
893 | * @handle: Pointer to TISCI handle | |
894 | * @id: Device Identifier | |
895 | * @reset_state: Pointer to reset state to populate | |
896 | * | |
897 | * Return: 0 if all went fine, else return appropriate error. | |
898 | */ | |
899 | static int ti_sci_cmd_get_device_resets(const struct ti_sci_handle *handle, | |
900 | u32 id, u32 *reset_state) | |
901 | { | |
902 | return ti_sci_get_device_state(handle, id, NULL, reset_state, NULL, | |
903 | NULL); | |
904 | } | |
905 | ||
9f723220 NM |
906 | /** |
907 | * ti_sci_set_clock_state() - Set clock state helper | |
908 | * @handle: pointer to TI SCI handle | |
909 | * @dev_id: Device identifier this request is for | |
910 | * @clk_id: Clock identifier for the device for this request. | |
911 | * Each device has it's own set of clock inputs. This indexes | |
912 | * which clock input to modify. | |
913 | * @flags: Header flags as needed | |
914 | * @state: State to request for the clock. | |
915 | * | |
916 | * Return: 0 if all went well, else returns appropriate error value. | |
917 | */ | |
918 | static int ti_sci_set_clock_state(const struct ti_sci_handle *handle, | |
919 | u32 dev_id, u8 clk_id, | |
920 | u32 flags, u8 state) | |
921 | { | |
922 | struct ti_sci_info *info; | |
923 | struct ti_sci_msg_req_set_clock_state *req; | |
924 | struct ti_sci_msg_hdr *resp; | |
925 | struct ti_sci_xfer *xfer; | |
926 | struct device *dev; | |
927 | int ret = 0; | |
928 | ||
929 | if (IS_ERR(handle)) | |
930 | return PTR_ERR(handle); | |
931 | if (!handle) | |
932 | return -EINVAL; | |
933 | ||
934 | info = handle_to_ti_sci_info(handle); | |
935 | dev = info->dev; | |
936 | ||
937 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_STATE, | |
938 | flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
939 | sizeof(*req), sizeof(*resp)); | |
940 | if (IS_ERR(xfer)) { | |
941 | ret = PTR_ERR(xfer); | |
942 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
943 | return ret; | |
944 | } | |
945 | req = (struct ti_sci_msg_req_set_clock_state *)xfer->xfer_buf; | |
946 | req->dev_id = dev_id; | |
947 | req->clk_id = clk_id; | |
948 | req->request_state = state; | |
949 | ||
950 | ret = ti_sci_do_xfer(info, xfer); | |
951 | if (ret) { | |
952 | dev_err(dev, "Mbox send fail %d\n", ret); | |
953 | goto fail; | |
954 | } | |
955 | ||
956 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
957 | ||
958 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
959 | ||
960 | fail: | |
961 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
962 | ||
963 | return ret; | |
964 | } | |
965 | ||
966 | /** | |
967 | * ti_sci_cmd_get_clock_state() - Get clock state helper | |
968 | * @handle: pointer to TI SCI handle | |
969 | * @dev_id: Device identifier this request is for | |
970 | * @clk_id: Clock identifier for the device for this request. | |
971 | * Each device has it's own set of clock inputs. This indexes | |
972 | * which clock input to modify. | |
973 | * @programmed_state: State requested for clock to move to | |
974 | * @current_state: State that the clock is currently in | |
975 | * | |
976 | * Return: 0 if all went well, else returns appropriate error value. | |
977 | */ | |
978 | static int ti_sci_cmd_get_clock_state(const struct ti_sci_handle *handle, | |
979 | u32 dev_id, u8 clk_id, | |
980 | u8 *programmed_state, u8 *current_state) | |
981 | { | |
982 | struct ti_sci_info *info; | |
983 | struct ti_sci_msg_req_get_clock_state *req; | |
984 | struct ti_sci_msg_resp_get_clock_state *resp; | |
985 | struct ti_sci_xfer *xfer; | |
986 | struct device *dev; | |
987 | int ret = 0; | |
988 | ||
989 | if (IS_ERR(handle)) | |
990 | return PTR_ERR(handle); | |
991 | if (!handle) | |
992 | return -EINVAL; | |
993 | ||
994 | if (!programmed_state && !current_state) | |
995 | return -EINVAL; | |
996 | ||
997 | info = handle_to_ti_sci_info(handle); | |
998 | dev = info->dev; | |
999 | ||
1000 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_STATE, | |
1001 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1002 | sizeof(*req), sizeof(*resp)); | |
1003 | if (IS_ERR(xfer)) { | |
1004 | ret = PTR_ERR(xfer); | |
1005 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1006 | return ret; | |
1007 | } | |
1008 | req = (struct ti_sci_msg_req_get_clock_state *)xfer->xfer_buf; | |
1009 | req->dev_id = dev_id; | |
1010 | req->clk_id = clk_id; | |
1011 | ||
1012 | ret = ti_sci_do_xfer(info, xfer); | |
1013 | if (ret) { | |
1014 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1015 | goto fail; | |
1016 | } | |
1017 | ||
1018 | resp = (struct ti_sci_msg_resp_get_clock_state *)xfer->xfer_buf; | |
1019 | ||
1020 | if (!ti_sci_is_response_ack(resp)) { | |
1021 | ret = -ENODEV; | |
1022 | goto fail; | |
1023 | } | |
1024 | ||
1025 | if (programmed_state) | |
1026 | *programmed_state = resp->programmed_state; | |
1027 | if (current_state) | |
1028 | *current_state = resp->current_state; | |
1029 | ||
1030 | fail: | |
1031 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1032 | ||
1033 | return ret; | |
1034 | } | |
1035 | ||
1036 | /** | |
1037 | * ti_sci_cmd_get_clock() - Get control of a clock from TI SCI | |
1038 | * @handle: pointer to TI SCI handle | |
1039 | * @dev_id: Device identifier this request is for | |
1040 | * @clk_id: Clock identifier for the device for this request. | |
1041 | * Each device has it's own set of clock inputs. This indexes | |
1042 | * which clock input to modify. | |
1043 | * @needs_ssc: 'true' if Spread Spectrum clock is desired, else 'false' | |
1044 | * @can_change_freq: 'true' if frequency change is desired, else 'false' | |
1045 | * @enable_input_term: 'true' if input termination is desired, else 'false' | |
1046 | * | |
1047 | * Return: 0 if all went well, else returns appropriate error value. | |
1048 | */ | |
1049 | static int ti_sci_cmd_get_clock(const struct ti_sci_handle *handle, u32 dev_id, | |
1050 | u8 clk_id, bool needs_ssc, bool can_change_freq, | |
1051 | bool enable_input_term) | |
1052 | { | |
1053 | u32 flags = 0; | |
1054 | ||
1055 | flags |= needs_ssc ? MSG_FLAG_CLOCK_ALLOW_SSC : 0; | |
1056 | flags |= can_change_freq ? MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE : 0; | |
1057 | flags |= enable_input_term ? MSG_FLAG_CLOCK_INPUT_TERM : 0; | |
1058 | ||
1059 | return ti_sci_set_clock_state(handle, dev_id, clk_id, flags, | |
1060 | MSG_CLOCK_SW_STATE_REQ); | |
1061 | } | |
1062 | ||
1063 | /** | |
1064 | * ti_sci_cmd_idle_clock() - Idle a clock which is in our control | |
1065 | * @handle: pointer to TI SCI handle | |
1066 | * @dev_id: Device identifier this request is for | |
1067 | * @clk_id: Clock identifier for the device for this request. | |
1068 | * Each device has it's own set of clock inputs. This indexes | |
1069 | * which clock input to modify. | |
1070 | * | |
1071 | * NOTE: This clock must have been requested by get_clock previously. | |
1072 | * | |
1073 | * Return: 0 if all went well, else returns appropriate error value. | |
1074 | */ | |
1075 | static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle, | |
1076 | u32 dev_id, u8 clk_id) | |
1077 | { | |
1078 | return ti_sci_set_clock_state(handle, dev_id, clk_id, 0, | |
1079 | MSG_CLOCK_SW_STATE_UNREQ); | |
1080 | } | |
1081 | ||
1082 | /** | |
1083 | * ti_sci_cmd_put_clock() - Release a clock from our control back to TISCI | |
1084 | * @handle: pointer to TI SCI handle | |
1085 | * @dev_id: Device identifier this request is for | |
1086 | * @clk_id: Clock identifier for the device for this request. | |
1087 | * Each device has it's own set of clock inputs. This indexes | |
1088 | * which clock input to modify. | |
1089 | * | |
1090 | * NOTE: This clock must have been requested by get_clock previously. | |
1091 | * | |
1092 | * Return: 0 if all went well, else returns appropriate error value. | |
1093 | */ | |
1094 | static int ti_sci_cmd_put_clock(const struct ti_sci_handle *handle, | |
1095 | u32 dev_id, u8 clk_id) | |
1096 | { | |
1097 | return ti_sci_set_clock_state(handle, dev_id, clk_id, 0, | |
1098 | MSG_CLOCK_SW_STATE_AUTO); | |
1099 | } | |
1100 | ||
1101 | /** | |
1102 | * ti_sci_cmd_clk_is_auto() - Is the clock being auto managed | |
1103 | * @handle: pointer to TI SCI handle | |
1104 | * @dev_id: Device identifier this request is for | |
1105 | * @clk_id: Clock identifier for the device for this request. | |
1106 | * Each device has it's own set of clock inputs. This indexes | |
1107 | * which clock input to modify. | |
1108 | * @req_state: state indicating if the clock is auto managed | |
1109 | * | |
1110 | * Return: 0 if all went well, else returns appropriate error value. | |
1111 | */ | |
1112 | static int ti_sci_cmd_clk_is_auto(const struct ti_sci_handle *handle, | |
1113 | u32 dev_id, u8 clk_id, bool *req_state) | |
1114 | { | |
1115 | u8 state = 0; | |
1116 | int ret; | |
1117 | ||
1118 | if (!req_state) | |
1119 | return -EINVAL; | |
1120 | ||
1121 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, &state, NULL); | |
1122 | if (ret) | |
1123 | return ret; | |
1124 | ||
1125 | *req_state = (state == MSG_CLOCK_SW_STATE_AUTO); | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | /** | |
1130 | * ti_sci_cmd_clk_is_on() - Is the clock ON | |
1131 | * @handle: pointer to TI SCI handle | |
1132 | * @dev_id: Device identifier this request is for | |
1133 | * @clk_id: Clock identifier for the device for this request. | |
1134 | * Each device has it's own set of clock inputs. This indexes | |
1135 | * which clock input to modify. | |
1136 | * @req_state: state indicating if the clock is managed by us and enabled | |
1137 | * @curr_state: state indicating if the clock is ready for operation | |
1138 | * | |
1139 | * Return: 0 if all went well, else returns appropriate error value. | |
1140 | */ | |
1141 | static int ti_sci_cmd_clk_is_on(const struct ti_sci_handle *handle, u32 dev_id, | |
1142 | u8 clk_id, bool *req_state, bool *curr_state) | |
1143 | { | |
1144 | u8 c_state = 0, r_state = 0; | |
1145 | int ret; | |
1146 | ||
1147 | if (!req_state && !curr_state) | |
1148 | return -EINVAL; | |
1149 | ||
1150 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, | |
1151 | &r_state, &c_state); | |
1152 | if (ret) | |
1153 | return ret; | |
1154 | ||
1155 | if (req_state) | |
1156 | *req_state = (r_state == MSG_CLOCK_SW_STATE_REQ); | |
1157 | if (curr_state) | |
1158 | *curr_state = (c_state == MSG_CLOCK_HW_STATE_READY); | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | /** | |
1163 | * ti_sci_cmd_clk_is_off() - Is the clock OFF | |
1164 | * @handle: pointer to TI SCI handle | |
1165 | * @dev_id: Device identifier this request is for | |
1166 | * @clk_id: Clock identifier for the device for this request. | |
1167 | * Each device has it's own set of clock inputs. This indexes | |
1168 | * which clock input to modify. | |
1169 | * @req_state: state indicating if the clock is managed by us and disabled | |
1170 | * @curr_state: state indicating if the clock is NOT ready for operation | |
1171 | * | |
1172 | * Return: 0 if all went well, else returns appropriate error value. | |
1173 | */ | |
1174 | static int ti_sci_cmd_clk_is_off(const struct ti_sci_handle *handle, u32 dev_id, | |
1175 | u8 clk_id, bool *req_state, bool *curr_state) | |
1176 | { | |
1177 | u8 c_state = 0, r_state = 0; | |
1178 | int ret; | |
1179 | ||
1180 | if (!req_state && !curr_state) | |
1181 | return -EINVAL; | |
1182 | ||
1183 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, | |
1184 | &r_state, &c_state); | |
1185 | if (ret) | |
1186 | return ret; | |
1187 | ||
1188 | if (req_state) | |
1189 | *req_state = (r_state == MSG_CLOCK_SW_STATE_UNREQ); | |
1190 | if (curr_state) | |
1191 | *curr_state = (c_state == MSG_CLOCK_HW_STATE_NOT_READY); | |
1192 | return 0; | |
1193 | } | |
1194 | ||
1195 | /** | |
1196 | * ti_sci_cmd_clk_set_parent() - Set the clock source of a specific device clock | |
1197 | * @handle: pointer to TI SCI handle | |
1198 | * @dev_id: Device identifier this request is for | |
1199 | * @clk_id: Clock identifier for the device for this request. | |
1200 | * Each device has it's own set of clock inputs. This indexes | |
1201 | * which clock input to modify. | |
1202 | * @parent_id: Parent clock identifier to set | |
1203 | * | |
1204 | * Return: 0 if all went well, else returns appropriate error value. | |
1205 | */ | |
1206 | static int ti_sci_cmd_clk_set_parent(const struct ti_sci_handle *handle, | |
1207 | u32 dev_id, u8 clk_id, u8 parent_id) | |
1208 | { | |
1209 | struct ti_sci_info *info; | |
1210 | struct ti_sci_msg_req_set_clock_parent *req; | |
1211 | struct ti_sci_msg_hdr *resp; | |
1212 | struct ti_sci_xfer *xfer; | |
1213 | struct device *dev; | |
1214 | int ret = 0; | |
1215 | ||
1216 | if (IS_ERR(handle)) | |
1217 | return PTR_ERR(handle); | |
1218 | if (!handle) | |
1219 | return -EINVAL; | |
1220 | ||
1221 | info = handle_to_ti_sci_info(handle); | |
1222 | dev = info->dev; | |
1223 | ||
1224 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_PARENT, | |
1225 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1226 | sizeof(*req), sizeof(*resp)); | |
1227 | if (IS_ERR(xfer)) { | |
1228 | ret = PTR_ERR(xfer); | |
1229 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1230 | return ret; | |
1231 | } | |
1232 | req = (struct ti_sci_msg_req_set_clock_parent *)xfer->xfer_buf; | |
1233 | req->dev_id = dev_id; | |
1234 | req->clk_id = clk_id; | |
1235 | req->parent_id = parent_id; | |
1236 | ||
1237 | ret = ti_sci_do_xfer(info, xfer); | |
1238 | if (ret) { | |
1239 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1240 | goto fail; | |
1241 | } | |
1242 | ||
1243 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1244 | ||
1245 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1246 | ||
1247 | fail: | |
1248 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1249 | ||
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | /** | |
1254 | * ti_sci_cmd_clk_get_parent() - Get current parent clock source | |
1255 | * @handle: pointer to TI SCI handle | |
1256 | * @dev_id: Device identifier this request is for | |
1257 | * @clk_id: Clock identifier for the device for this request. | |
1258 | * Each device has it's own set of clock inputs. This indexes | |
1259 | * which clock input to modify. | |
1260 | * @parent_id: Current clock parent | |
1261 | * | |
1262 | * Return: 0 if all went well, else returns appropriate error value. | |
1263 | */ | |
1264 | static int ti_sci_cmd_clk_get_parent(const struct ti_sci_handle *handle, | |
1265 | u32 dev_id, u8 clk_id, u8 *parent_id) | |
1266 | { | |
1267 | struct ti_sci_info *info; | |
1268 | struct ti_sci_msg_req_get_clock_parent *req; | |
1269 | struct ti_sci_msg_resp_get_clock_parent *resp; | |
1270 | struct ti_sci_xfer *xfer; | |
1271 | struct device *dev; | |
1272 | int ret = 0; | |
1273 | ||
1274 | if (IS_ERR(handle)) | |
1275 | return PTR_ERR(handle); | |
1276 | if (!handle || !parent_id) | |
1277 | return -EINVAL; | |
1278 | ||
1279 | info = handle_to_ti_sci_info(handle); | |
1280 | dev = info->dev; | |
1281 | ||
1282 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_PARENT, | |
1283 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1284 | sizeof(*req), sizeof(*resp)); | |
1285 | if (IS_ERR(xfer)) { | |
1286 | ret = PTR_ERR(xfer); | |
1287 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1288 | return ret; | |
1289 | } | |
1290 | req = (struct ti_sci_msg_req_get_clock_parent *)xfer->xfer_buf; | |
1291 | req->dev_id = dev_id; | |
1292 | req->clk_id = clk_id; | |
1293 | ||
1294 | ret = ti_sci_do_xfer(info, xfer); | |
1295 | if (ret) { | |
1296 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1297 | goto fail; | |
1298 | } | |
1299 | ||
1300 | resp = (struct ti_sci_msg_resp_get_clock_parent *)xfer->xfer_buf; | |
1301 | ||
1302 | if (!ti_sci_is_response_ack(resp)) | |
1303 | ret = -ENODEV; | |
1304 | else | |
1305 | *parent_id = resp->parent_id; | |
1306 | ||
1307 | fail: | |
1308 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1309 | ||
1310 | return ret; | |
1311 | } | |
1312 | ||
1313 | /** | |
1314 | * ti_sci_cmd_clk_get_num_parents() - Get num parents of the current clk source | |
1315 | * @handle: pointer to TI SCI handle | |
1316 | * @dev_id: Device identifier this request is for | |
1317 | * @clk_id: Clock identifier for the device for this request. | |
1318 | * Each device has it's own set of clock inputs. This indexes | |
1319 | * which clock input to modify. | |
1320 | * @num_parents: Returns he number of parents to the current clock. | |
1321 | * | |
1322 | * Return: 0 if all went well, else returns appropriate error value. | |
1323 | */ | |
1324 | static int ti_sci_cmd_clk_get_num_parents(const struct ti_sci_handle *handle, | |
1325 | u32 dev_id, u8 clk_id, | |
1326 | u8 *num_parents) | |
1327 | { | |
1328 | struct ti_sci_info *info; | |
1329 | struct ti_sci_msg_req_get_clock_num_parents *req; | |
1330 | struct ti_sci_msg_resp_get_clock_num_parents *resp; | |
1331 | struct ti_sci_xfer *xfer; | |
1332 | struct device *dev; | |
1333 | int ret = 0; | |
1334 | ||
1335 | if (IS_ERR(handle)) | |
1336 | return PTR_ERR(handle); | |
1337 | if (!handle || !num_parents) | |
1338 | return -EINVAL; | |
1339 | ||
1340 | info = handle_to_ti_sci_info(handle); | |
1341 | dev = info->dev; | |
1342 | ||
1343 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_NUM_CLOCK_PARENTS, | |
1344 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1345 | sizeof(*req), sizeof(*resp)); | |
1346 | if (IS_ERR(xfer)) { | |
1347 | ret = PTR_ERR(xfer); | |
1348 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1349 | return ret; | |
1350 | } | |
1351 | req = (struct ti_sci_msg_req_get_clock_num_parents *)xfer->xfer_buf; | |
1352 | req->dev_id = dev_id; | |
1353 | req->clk_id = clk_id; | |
1354 | ||
1355 | ret = ti_sci_do_xfer(info, xfer); | |
1356 | if (ret) { | |
1357 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1358 | goto fail; | |
1359 | } | |
1360 | ||
1361 | resp = (struct ti_sci_msg_resp_get_clock_num_parents *)xfer->xfer_buf; | |
1362 | ||
1363 | if (!ti_sci_is_response_ack(resp)) | |
1364 | ret = -ENODEV; | |
1365 | else | |
1366 | *num_parents = resp->num_parents; | |
1367 | ||
1368 | fail: | |
1369 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1370 | ||
1371 | return ret; | |
1372 | } | |
1373 | ||
1374 | /** | |
1375 | * ti_sci_cmd_clk_get_match_freq() - Find a good match for frequency | |
1376 | * @handle: pointer to TI SCI handle | |
1377 | * @dev_id: Device identifier this request is for | |
1378 | * @clk_id: Clock identifier for the device for this request. | |
1379 | * Each device has it's own set of clock inputs. This indexes | |
1380 | * which clock input to modify. | |
1381 | * @min_freq: The minimum allowable frequency in Hz. This is the minimum | |
1382 | * allowable programmed frequency and does not account for clock | |
1383 | * tolerances and jitter. | |
1384 | * @target_freq: The target clock frequency in Hz. A frequency will be | |
1385 | * processed as close to this target frequency as possible. | |
1386 | * @max_freq: The maximum allowable frequency in Hz. This is the maximum | |
1387 | * allowable programmed frequency and does not account for clock | |
1388 | * tolerances and jitter. | |
1389 | * @match_freq: Frequency match in Hz response. | |
1390 | * | |
1391 | * Return: 0 if all went well, else returns appropriate error value. | |
1392 | */ | |
1393 | static int ti_sci_cmd_clk_get_match_freq(const struct ti_sci_handle *handle, | |
1394 | u32 dev_id, u8 clk_id, u64 min_freq, | |
1395 | u64 target_freq, u64 max_freq, | |
1396 | u64 *match_freq) | |
1397 | { | |
1398 | struct ti_sci_info *info; | |
1399 | struct ti_sci_msg_req_query_clock_freq *req; | |
1400 | struct ti_sci_msg_resp_query_clock_freq *resp; | |
1401 | struct ti_sci_xfer *xfer; | |
1402 | struct device *dev; | |
1403 | int ret = 0; | |
1404 | ||
1405 | if (IS_ERR(handle)) | |
1406 | return PTR_ERR(handle); | |
1407 | if (!handle || !match_freq) | |
1408 | return -EINVAL; | |
1409 | ||
1410 | info = handle_to_ti_sci_info(handle); | |
1411 | dev = info->dev; | |
1412 | ||
1413 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_QUERY_CLOCK_FREQ, | |
1414 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1415 | sizeof(*req), sizeof(*resp)); | |
1416 | if (IS_ERR(xfer)) { | |
1417 | ret = PTR_ERR(xfer); | |
1418 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1419 | return ret; | |
1420 | } | |
1421 | req = (struct ti_sci_msg_req_query_clock_freq *)xfer->xfer_buf; | |
1422 | req->dev_id = dev_id; | |
1423 | req->clk_id = clk_id; | |
1424 | req->min_freq_hz = min_freq; | |
1425 | req->target_freq_hz = target_freq; | |
1426 | req->max_freq_hz = max_freq; | |
1427 | ||
1428 | ret = ti_sci_do_xfer(info, xfer); | |
1429 | if (ret) { | |
1430 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1431 | goto fail; | |
1432 | } | |
1433 | ||
1434 | resp = (struct ti_sci_msg_resp_query_clock_freq *)xfer->xfer_buf; | |
1435 | ||
1436 | if (!ti_sci_is_response_ack(resp)) | |
1437 | ret = -ENODEV; | |
1438 | else | |
1439 | *match_freq = resp->freq_hz; | |
1440 | ||
1441 | fail: | |
1442 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1443 | ||
1444 | return ret; | |
1445 | } | |
1446 | ||
1447 | /** | |
1448 | * ti_sci_cmd_clk_set_freq() - Set a frequency for clock | |
1449 | * @handle: pointer to TI SCI handle | |
1450 | * @dev_id: Device identifier this request is for | |
1451 | * @clk_id: Clock identifier for the device for this request. | |
1452 | * Each device has it's own set of clock inputs. This indexes | |
1453 | * which clock input to modify. | |
1454 | * @min_freq: The minimum allowable frequency in Hz. This is the minimum | |
1455 | * allowable programmed frequency and does not account for clock | |
1456 | * tolerances and jitter. | |
1457 | * @target_freq: The target clock frequency in Hz. A frequency will be | |
1458 | * processed as close to this target frequency as possible. | |
1459 | * @max_freq: The maximum allowable frequency in Hz. This is the maximum | |
1460 | * allowable programmed frequency and does not account for clock | |
1461 | * tolerances and jitter. | |
1462 | * | |
1463 | * Return: 0 if all went well, else returns appropriate error value. | |
1464 | */ | |
1465 | static int ti_sci_cmd_clk_set_freq(const struct ti_sci_handle *handle, | |
1466 | u32 dev_id, u8 clk_id, u64 min_freq, | |
1467 | u64 target_freq, u64 max_freq) | |
1468 | { | |
1469 | struct ti_sci_info *info; | |
1470 | struct ti_sci_msg_req_set_clock_freq *req; | |
1471 | struct ti_sci_msg_hdr *resp; | |
1472 | struct ti_sci_xfer *xfer; | |
1473 | struct device *dev; | |
1474 | int ret = 0; | |
1475 | ||
1476 | if (IS_ERR(handle)) | |
1477 | return PTR_ERR(handle); | |
1478 | if (!handle) | |
1479 | return -EINVAL; | |
1480 | ||
1481 | info = handle_to_ti_sci_info(handle); | |
1482 | dev = info->dev; | |
1483 | ||
1484 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_FREQ, | |
1485 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1486 | sizeof(*req), sizeof(*resp)); | |
1487 | if (IS_ERR(xfer)) { | |
1488 | ret = PTR_ERR(xfer); | |
1489 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1490 | return ret; | |
1491 | } | |
1492 | req = (struct ti_sci_msg_req_set_clock_freq *)xfer->xfer_buf; | |
1493 | req->dev_id = dev_id; | |
1494 | req->clk_id = clk_id; | |
1495 | req->min_freq_hz = min_freq; | |
1496 | req->target_freq_hz = target_freq; | |
1497 | req->max_freq_hz = max_freq; | |
1498 | ||
1499 | ret = ti_sci_do_xfer(info, xfer); | |
1500 | if (ret) { | |
1501 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1502 | goto fail; | |
1503 | } | |
1504 | ||
1505 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1506 | ||
1507 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1508 | ||
1509 | fail: | |
1510 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1511 | ||
1512 | return ret; | |
1513 | } | |
1514 | ||
1515 | /** | |
1516 | * ti_sci_cmd_clk_get_freq() - Get current frequency | |
1517 | * @handle: pointer to TI SCI handle | |
1518 | * @dev_id: Device identifier this request is for | |
1519 | * @clk_id: Clock identifier for the device for this request. | |
1520 | * Each device has it's own set of clock inputs. This indexes | |
1521 | * which clock input to modify. | |
1522 | * @freq: Currently frequency in Hz | |
1523 | * | |
1524 | * Return: 0 if all went well, else returns appropriate error value. | |
1525 | */ | |
1526 | static int ti_sci_cmd_clk_get_freq(const struct ti_sci_handle *handle, | |
1527 | u32 dev_id, u8 clk_id, u64 *freq) | |
1528 | { | |
1529 | struct ti_sci_info *info; | |
1530 | struct ti_sci_msg_req_get_clock_freq *req; | |
1531 | struct ti_sci_msg_resp_get_clock_freq *resp; | |
1532 | struct ti_sci_xfer *xfer; | |
1533 | struct device *dev; | |
1534 | int ret = 0; | |
1535 | ||
1536 | if (IS_ERR(handle)) | |
1537 | return PTR_ERR(handle); | |
1538 | if (!handle || !freq) | |
1539 | return -EINVAL; | |
1540 | ||
1541 | info = handle_to_ti_sci_info(handle); | |
1542 | dev = info->dev; | |
1543 | ||
1544 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_FREQ, | |
1545 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1546 | sizeof(*req), sizeof(*resp)); | |
1547 | if (IS_ERR(xfer)) { | |
1548 | ret = PTR_ERR(xfer); | |
1549 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1550 | return ret; | |
1551 | } | |
1552 | req = (struct ti_sci_msg_req_get_clock_freq *)xfer->xfer_buf; | |
1553 | req->dev_id = dev_id; | |
1554 | req->clk_id = clk_id; | |
1555 | ||
1556 | ret = ti_sci_do_xfer(info, xfer); | |
1557 | if (ret) { | |
1558 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1559 | goto fail; | |
1560 | } | |
1561 | ||
1562 | resp = (struct ti_sci_msg_resp_get_clock_freq *)xfer->xfer_buf; | |
1563 | ||
1564 | if (!ti_sci_is_response_ack(resp)) | |
1565 | ret = -ENODEV; | |
1566 | else | |
1567 | *freq = resp->freq_hz; | |
1568 | ||
1569 | fail: | |
1570 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1571 | ||
1572 | return ret; | |
1573 | } | |
1574 | ||
912cffb4 NM |
1575 | static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle) |
1576 | { | |
1577 | struct ti_sci_info *info; | |
1578 | struct ti_sci_msg_req_reboot *req; | |
1579 | struct ti_sci_msg_hdr *resp; | |
1580 | struct ti_sci_xfer *xfer; | |
1581 | struct device *dev; | |
1582 | int ret = 0; | |
1583 | ||
1584 | if (IS_ERR(handle)) | |
1585 | return PTR_ERR(handle); | |
1586 | if (!handle) | |
1587 | return -EINVAL; | |
1588 | ||
1589 | info = handle_to_ti_sci_info(handle); | |
1590 | dev = info->dev; | |
1591 | ||
1592 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SYS_RESET, | |
1593 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1594 | sizeof(*req), sizeof(*resp)); | |
1595 | if (IS_ERR(xfer)) { | |
1596 | ret = PTR_ERR(xfer); | |
1597 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1598 | return ret; | |
1599 | } | |
1600 | req = (struct ti_sci_msg_req_reboot *)xfer->xfer_buf; | |
1601 | ||
1602 | ret = ti_sci_do_xfer(info, xfer); | |
1603 | if (ret) { | |
1604 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1605 | goto fail; | |
1606 | } | |
1607 | ||
1608 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1609 | ||
1610 | if (!ti_sci_is_response_ack(resp)) | |
1611 | ret = -ENODEV; | |
1612 | else | |
1613 | ret = 0; | |
1614 | ||
1615 | fail: | |
1616 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1617 | ||
1618 | return ret; | |
1619 | } | |
1620 | ||
9c19fb68 LV |
1621 | static int ti_sci_get_resource_type(struct ti_sci_info *info, u16 dev_id, |
1622 | u16 *type) | |
1623 | { | |
1624 | struct ti_sci_rm_type_map *rm_type_map = info->desc->rm_type_map; | |
1625 | bool found = false; | |
1626 | int i; | |
1627 | ||
1628 | /* If map is not provided then assume dev_id is used as type */ | |
1629 | if (!rm_type_map) { | |
1630 | *type = dev_id; | |
1631 | return 0; | |
1632 | } | |
1633 | ||
1634 | for (i = 0; rm_type_map[i].dev_id; i++) { | |
1635 | if (rm_type_map[i].dev_id == dev_id) { | |
1636 | *type = rm_type_map[i].type; | |
1637 | found = true; | |
1638 | break; | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | if (!found) | |
1643 | return -EINVAL; | |
1644 | ||
1645 | return 0; | |
1646 | } | |
1647 | ||
1648 | /** | |
1649 | * ti_sci_get_resource_range - Helper to get a range of resources assigned | |
1650 | * to a host. Resource is uniquely identified by | |
1651 | * type and subtype. | |
1652 | * @handle: Pointer to TISCI handle. | |
1653 | * @dev_id: TISCI device ID. | |
1654 | * @subtype: Resource assignment subtype that is being requested | |
1655 | * from the given device. | |
1656 | * @s_host: Host processor ID to which the resources are allocated | |
1657 | * @range_start: Start index of the resource range | |
1658 | * @range_num: Number of resources in the range | |
1659 | * | |
1660 | * Return: 0 if all went fine, else return appropriate error. | |
1661 | */ | |
1662 | static int ti_sci_get_resource_range(const struct ti_sci_handle *handle, | |
1663 | u32 dev_id, u8 subtype, u8 s_host, | |
1664 | u16 *range_start, u16 *range_num) | |
1665 | { | |
1666 | struct ti_sci_msg_resp_get_resource_range *resp; | |
1667 | struct ti_sci_msg_req_get_resource_range *req; | |
1668 | struct ti_sci_xfer *xfer; | |
1669 | struct ti_sci_info *info; | |
1670 | struct device *dev; | |
1671 | u16 type; | |
1672 | int ret = 0; | |
1673 | ||
1674 | if (IS_ERR(handle)) | |
1675 | return PTR_ERR(handle); | |
1676 | if (!handle) | |
1677 | return -EINVAL; | |
1678 | ||
1679 | info = handle_to_ti_sci_info(handle); | |
1680 | dev = info->dev; | |
1681 | ||
1682 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_RESOURCE_RANGE, | |
1683 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1684 | sizeof(*req), sizeof(*resp)); | |
1685 | if (IS_ERR(xfer)) { | |
1686 | ret = PTR_ERR(xfer); | |
1687 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1688 | return ret; | |
1689 | } | |
1690 | ||
1691 | ret = ti_sci_get_resource_type(info, dev_id, &type); | |
1692 | if (ret) { | |
1693 | dev_err(dev, "rm type lookup failed for %u\n", dev_id); | |
1694 | goto fail; | |
1695 | } | |
1696 | ||
1697 | req = (struct ti_sci_msg_req_get_resource_range *)xfer->xfer_buf; | |
1698 | req->secondary_host = s_host; | |
1699 | req->type = type & MSG_RM_RESOURCE_TYPE_MASK; | |
1700 | req->subtype = subtype & MSG_RM_RESOURCE_SUBTYPE_MASK; | |
1701 | ||
1702 | ret = ti_sci_do_xfer(info, xfer); | |
1703 | if (ret) { | |
1704 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1705 | goto fail; | |
1706 | } | |
1707 | ||
1708 | resp = (struct ti_sci_msg_resp_get_resource_range *)xfer->xfer_buf; | |
1709 | ||
1710 | if (!ti_sci_is_response_ack(resp)) { | |
1711 | ret = -ENODEV; | |
1712 | } else if (!resp->range_start && !resp->range_num) { | |
1713 | ret = -ENODEV; | |
1714 | } else { | |
1715 | *range_start = resp->range_start; | |
1716 | *range_num = resp->range_num; | |
1717 | }; | |
1718 | ||
1719 | fail: | |
1720 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1721 | ||
1722 | return ret; | |
1723 | } | |
1724 | ||
1725 | /** | |
1726 | * ti_sci_cmd_get_resource_range - Get a range of resources assigned to host | |
1727 | * that is same as ti sci interface host. | |
1728 | * @handle: Pointer to TISCI handle. | |
1729 | * @dev_id: TISCI device ID. | |
1730 | * @subtype: Resource assignment subtype that is being requested | |
1731 | * from the given device. | |
1732 | * @range_start: Start index of the resource range | |
1733 | * @range_num: Number of resources in the range | |
1734 | * | |
1735 | * Return: 0 if all went fine, else return appropriate error. | |
1736 | */ | |
1737 | static int ti_sci_cmd_get_resource_range(const struct ti_sci_handle *handle, | |
1738 | u32 dev_id, u8 subtype, | |
1739 | u16 *range_start, u16 *range_num) | |
1740 | { | |
1741 | return ti_sci_get_resource_range(handle, dev_id, subtype, | |
1742 | TI_SCI_IRQ_SECONDARY_HOST_INVALID, | |
1743 | range_start, range_num); | |
1744 | } | |
1745 | ||
1746 | /** | |
1747 | * ti_sci_cmd_get_resource_range_from_shost - Get a range of resources | |
1748 | * assigned to a specified host. | |
1749 | * @handle: Pointer to TISCI handle. | |
1750 | * @dev_id: TISCI device ID. | |
1751 | * @subtype: Resource assignment subtype that is being requested | |
1752 | * from the given device. | |
1753 | * @s_host: Host processor ID to which the resources are allocated | |
1754 | * @range_start: Start index of the resource range | |
1755 | * @range_num: Number of resources in the range | |
1756 | * | |
1757 | * Return: 0 if all went fine, else return appropriate error. | |
1758 | */ | |
1759 | static | |
1760 | int ti_sci_cmd_get_resource_range_from_shost(const struct ti_sci_handle *handle, | |
1761 | u32 dev_id, u8 subtype, u8 s_host, | |
1762 | u16 *range_start, u16 *range_num) | |
1763 | { | |
1764 | return ti_sci_get_resource_range(handle, dev_id, subtype, s_host, | |
1765 | range_start, range_num); | |
1766 | } | |
1767 | ||
997b001f LV |
1768 | /** |
1769 | * ti_sci_manage_irq() - Helper api to configure/release the irq route between | |
1770 | * the requested source and destination | |
1771 | * @handle: Pointer to TISCI handle. | |
1772 | * @valid_params: Bit fields defining the validity of certain params | |
1773 | * @src_id: Device ID of the IRQ source | |
1774 | * @src_index: IRQ source index within the source device | |
1775 | * @dst_id: Device ID of the IRQ destination | |
1776 | * @dst_host_irq: IRQ number of the destination device | |
1777 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1778 | * @vint: Virtual interrupt to be used within the IA | |
1779 | * @global_event: Global event number to be used for the requesting event | |
1780 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1781 | * @s_host: Secondary host ID to which the irq/event is being | |
1782 | * requested for. | |
1783 | * @type: Request type irq set or release. | |
1784 | * | |
1785 | * Return: 0 if all went fine, else return appropriate error. | |
1786 | */ | |
1787 | static int ti_sci_manage_irq(const struct ti_sci_handle *handle, | |
1788 | u32 valid_params, u16 src_id, u16 src_index, | |
1789 | u16 dst_id, u16 dst_host_irq, u16 ia_id, u16 vint, | |
1790 | u16 global_event, u8 vint_status_bit, u8 s_host, | |
1791 | u16 type) | |
1792 | { | |
1793 | struct ti_sci_msg_req_manage_irq *req; | |
1794 | struct ti_sci_msg_hdr *resp; | |
1795 | struct ti_sci_xfer *xfer; | |
1796 | struct ti_sci_info *info; | |
1797 | struct device *dev; | |
1798 | int ret = 0; | |
1799 | ||
1800 | if (IS_ERR(handle)) | |
1801 | return PTR_ERR(handle); | |
1802 | if (!handle) | |
1803 | return -EINVAL; | |
1804 | ||
1805 | info = handle_to_ti_sci_info(handle); | |
1806 | dev = info->dev; | |
1807 | ||
1808 | xfer = ti_sci_get_one_xfer(info, type, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1809 | sizeof(*req), sizeof(*resp)); | |
1810 | if (IS_ERR(xfer)) { | |
1811 | ret = PTR_ERR(xfer); | |
1812 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1813 | return ret; | |
1814 | } | |
1815 | req = (struct ti_sci_msg_req_manage_irq *)xfer->xfer_buf; | |
1816 | req->valid_params = valid_params; | |
1817 | req->src_id = src_id; | |
1818 | req->src_index = src_index; | |
1819 | req->dst_id = dst_id; | |
1820 | req->dst_host_irq = dst_host_irq; | |
1821 | req->ia_id = ia_id; | |
1822 | req->vint = vint; | |
1823 | req->global_event = global_event; | |
1824 | req->vint_status_bit = vint_status_bit; | |
1825 | req->secondary_host = s_host; | |
1826 | ||
1827 | ret = ti_sci_do_xfer(info, xfer); | |
1828 | if (ret) { | |
1829 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1830 | goto fail; | |
1831 | } | |
1832 | ||
1833 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1834 | ||
1835 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1836 | ||
1837 | fail: | |
1838 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1839 | ||
1840 | return ret; | |
1841 | } | |
1842 | ||
1843 | /** | |
1844 | * ti_sci_set_irq() - Helper api to configure the irq route between the | |
1845 | * requested source and destination | |
1846 | * @handle: Pointer to TISCI handle. | |
1847 | * @valid_params: Bit fields defining the validity of certain params | |
1848 | * @src_id: Device ID of the IRQ source | |
1849 | * @src_index: IRQ source index within the source device | |
1850 | * @dst_id: Device ID of the IRQ destination | |
1851 | * @dst_host_irq: IRQ number of the destination device | |
1852 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1853 | * @vint: Virtual interrupt to be used within the IA | |
1854 | * @global_event: Global event number to be used for the requesting event | |
1855 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1856 | * @s_host: Secondary host ID to which the irq/event is being | |
1857 | * requested for. | |
1858 | * | |
1859 | * Return: 0 if all went fine, else return appropriate error. | |
1860 | */ | |
1861 | static int ti_sci_set_irq(const struct ti_sci_handle *handle, u32 valid_params, | |
1862 | u16 src_id, u16 src_index, u16 dst_id, | |
1863 | u16 dst_host_irq, u16 ia_id, u16 vint, | |
1864 | u16 global_event, u8 vint_status_bit, u8 s_host) | |
1865 | { | |
1866 | pr_debug("%s: IRQ set with valid_params = 0x%x from src = %d, index = %d, to dst = %d, irq = %d,via ia_id = %d, vint = %d, global event = %d,status_bit = %d\n", | |
1867 | __func__, valid_params, src_id, src_index, | |
1868 | dst_id, dst_host_irq, ia_id, vint, global_event, | |
1869 | vint_status_bit); | |
1870 | ||
1871 | return ti_sci_manage_irq(handle, valid_params, src_id, src_index, | |
1872 | dst_id, dst_host_irq, ia_id, vint, | |
1873 | global_event, vint_status_bit, s_host, | |
1874 | TI_SCI_MSG_SET_IRQ); | |
1875 | } | |
1876 | ||
1877 | /** | |
1878 | * ti_sci_free_irq() - Helper api to free the irq route between the | |
1879 | * requested source and destination | |
1880 | * @handle: Pointer to TISCI handle. | |
1881 | * @valid_params: Bit fields defining the validity of certain params | |
1882 | * @src_id: Device ID of the IRQ source | |
1883 | * @src_index: IRQ source index within the source device | |
1884 | * @dst_id: Device ID of the IRQ destination | |
1885 | * @dst_host_irq: IRQ number of the destination device | |
1886 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1887 | * @vint: Virtual interrupt to be used within the IA | |
1888 | * @global_event: Global event number to be used for the requesting event | |
1889 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1890 | * @s_host: Secondary host ID to which the irq/event is being | |
1891 | * requested for. | |
1892 | * | |
1893 | * Return: 0 if all went fine, else return appropriate error. | |
1894 | */ | |
1895 | static int ti_sci_free_irq(const struct ti_sci_handle *handle, u32 valid_params, | |
1896 | u16 src_id, u16 src_index, u16 dst_id, | |
1897 | u16 dst_host_irq, u16 ia_id, u16 vint, | |
1898 | u16 global_event, u8 vint_status_bit, u8 s_host) | |
1899 | { | |
1900 | pr_debug("%s: IRQ release with valid_params = 0x%x from src = %d, index = %d, to dst = %d, irq = %d,via ia_id = %d, vint = %d, global event = %d,status_bit = %d\n", | |
1901 | __func__, valid_params, src_id, src_index, | |
1902 | dst_id, dst_host_irq, ia_id, vint, global_event, | |
1903 | vint_status_bit); | |
1904 | ||
1905 | return ti_sci_manage_irq(handle, valid_params, src_id, src_index, | |
1906 | dst_id, dst_host_irq, ia_id, vint, | |
1907 | global_event, vint_status_bit, s_host, | |
1908 | TI_SCI_MSG_FREE_IRQ); | |
1909 | } | |
1910 | ||
1911 | /** | |
1912 | * ti_sci_cmd_set_irq() - Configure a host irq route between the requested | |
1913 | * source and destination. | |
1914 | * @handle: Pointer to TISCI handle. | |
1915 | * @src_id: Device ID of the IRQ source | |
1916 | * @src_index: IRQ source index within the source device | |
1917 | * @dst_id: Device ID of the IRQ destination | |
1918 | * @dst_host_irq: IRQ number of the destination device | |
1919 | * @vint_irq: Boolean specifying if this interrupt belongs to | |
1920 | * Interrupt Aggregator. | |
1921 | * | |
1922 | * Return: 0 if all went fine, else return appropriate error. | |
1923 | */ | |
1924 | static int ti_sci_cmd_set_irq(const struct ti_sci_handle *handle, u16 src_id, | |
1925 | u16 src_index, u16 dst_id, u16 dst_host_irq) | |
1926 | { | |
1927 | u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; | |
1928 | ||
1929 | return ti_sci_set_irq(handle, valid_params, src_id, src_index, dst_id, | |
1930 | dst_host_irq, 0, 0, 0, 0, 0); | |
1931 | } | |
1932 | ||
1933 | /** | |
1934 | * ti_sci_cmd_set_event_map() - Configure an event based irq route between the | |
1935 | * requested source and Interrupt Aggregator. | |
1936 | * @handle: Pointer to TISCI handle. | |
1937 | * @src_id: Device ID of the IRQ source | |
1938 | * @src_index: IRQ source index within the source device | |
1939 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1940 | * @vint: Virtual interrupt to be used within the IA | |
1941 | * @global_event: Global event number to be used for the requesting event | |
1942 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1943 | * | |
1944 | * Return: 0 if all went fine, else return appropriate error. | |
1945 | */ | |
1946 | static int ti_sci_cmd_set_event_map(const struct ti_sci_handle *handle, | |
1947 | u16 src_id, u16 src_index, u16 ia_id, | |
1948 | u16 vint, u16 global_event, | |
1949 | u8 vint_status_bit) | |
1950 | { | |
1951 | u32 valid_params = MSG_FLAG_IA_ID_VALID | MSG_FLAG_VINT_VALID | | |
1952 | MSG_FLAG_GLB_EVNT_VALID | | |
1953 | MSG_FLAG_VINT_STS_BIT_VALID; | |
1954 | ||
1955 | return ti_sci_set_irq(handle, valid_params, src_id, src_index, 0, 0, | |
1956 | ia_id, vint, global_event, vint_status_bit, 0); | |
1957 | } | |
1958 | ||
1959 | /** | |
1960 | * ti_sci_cmd_free_irq() - Free a host irq route between the between the | |
1961 | * requested source and destination. | |
1962 | * @handle: Pointer to TISCI handle. | |
1963 | * @src_id: Device ID of the IRQ source | |
1964 | * @src_index: IRQ source index within the source device | |
1965 | * @dst_id: Device ID of the IRQ destination | |
1966 | * @dst_host_irq: IRQ number of the destination device | |
1967 | * @vint_irq: Boolean specifying if this interrupt belongs to | |
1968 | * Interrupt Aggregator. | |
1969 | * | |
1970 | * Return: 0 if all went fine, else return appropriate error. | |
1971 | */ | |
1972 | static int ti_sci_cmd_free_irq(const struct ti_sci_handle *handle, u16 src_id, | |
1973 | u16 src_index, u16 dst_id, u16 dst_host_irq) | |
1974 | { | |
1975 | u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; | |
1976 | ||
1977 | return ti_sci_free_irq(handle, valid_params, src_id, src_index, dst_id, | |
1978 | dst_host_irq, 0, 0, 0, 0, 0); | |
1979 | } | |
1980 | ||
1981 | /** | |
1982 | * ti_sci_cmd_free_event_map() - Free an event map between the requested source | |
1983 | * and Interrupt Aggregator. | |
1984 | * @handle: Pointer to TISCI handle. | |
1985 | * @src_id: Device ID of the IRQ source | |
1986 | * @src_index: IRQ source index within the source device | |
1987 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1988 | * @vint: Virtual interrupt to be used within the IA | |
1989 | * @global_event: Global event number to be used for the requesting event | |
1990 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1991 | * | |
1992 | * Return: 0 if all went fine, else return appropriate error. | |
1993 | */ | |
1994 | static int ti_sci_cmd_free_event_map(const struct ti_sci_handle *handle, | |
1995 | u16 src_id, u16 src_index, u16 ia_id, | |
1996 | u16 vint, u16 global_event, | |
1997 | u8 vint_status_bit) | |
1998 | { | |
1999 | u32 valid_params = MSG_FLAG_IA_ID_VALID | | |
2000 | MSG_FLAG_VINT_VALID | MSG_FLAG_GLB_EVNT_VALID | | |
2001 | MSG_FLAG_VINT_STS_BIT_VALID; | |
2002 | ||
2003 | return ti_sci_free_irq(handle, valid_params, src_id, src_index, 0, 0, | |
2004 | ia_id, vint, global_event, vint_status_bit, 0); | |
2005 | } | |
2006 | ||
9e7d756d NM |
2007 | /* |
2008 | * ti_sci_setup_ops() - Setup the operations structures | |
2009 | * @info: pointer to TISCI pointer | |
2010 | */ | |
2011 | static void ti_sci_setup_ops(struct ti_sci_info *info) | |
2012 | { | |
2013 | struct ti_sci_ops *ops = &info->handle.ops; | |
912cffb4 | 2014 | struct ti_sci_core_ops *core_ops = &ops->core_ops; |
9e7d756d | 2015 | struct ti_sci_dev_ops *dops = &ops->dev_ops; |
9f723220 | 2016 | struct ti_sci_clk_ops *cops = &ops->clk_ops; |
9c19fb68 | 2017 | struct ti_sci_rm_core_ops *rm_core_ops = &ops->rm_core_ops; |
997b001f | 2018 | struct ti_sci_rm_irq_ops *iops = &ops->rm_irq_ops; |
9e7d756d | 2019 | |
912cffb4 NM |
2020 | core_ops->reboot_device = ti_sci_cmd_core_reboot; |
2021 | ||
9e7d756d NM |
2022 | dops->get_device = ti_sci_cmd_get_device; |
2023 | dops->idle_device = ti_sci_cmd_idle_device; | |
2024 | dops->put_device = ti_sci_cmd_put_device; | |
2025 | ||
2026 | dops->is_valid = ti_sci_cmd_dev_is_valid; | |
2027 | dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt; | |
2028 | dops->is_idle = ti_sci_cmd_dev_is_idle; | |
2029 | dops->is_stop = ti_sci_cmd_dev_is_stop; | |
2030 | dops->is_on = ti_sci_cmd_dev_is_on; | |
2031 | dops->is_transitioning = ti_sci_cmd_dev_is_trans; | |
2032 | dops->set_device_resets = ti_sci_cmd_set_device_resets; | |
2033 | dops->get_device_resets = ti_sci_cmd_get_device_resets; | |
9f723220 NM |
2034 | |
2035 | cops->get_clock = ti_sci_cmd_get_clock; | |
2036 | cops->idle_clock = ti_sci_cmd_idle_clock; | |
2037 | cops->put_clock = ti_sci_cmd_put_clock; | |
2038 | cops->is_auto = ti_sci_cmd_clk_is_auto; | |
2039 | cops->is_on = ti_sci_cmd_clk_is_on; | |
2040 | cops->is_off = ti_sci_cmd_clk_is_off; | |
2041 | ||
2042 | cops->set_parent = ti_sci_cmd_clk_set_parent; | |
2043 | cops->get_parent = ti_sci_cmd_clk_get_parent; | |
2044 | cops->get_num_parents = ti_sci_cmd_clk_get_num_parents; | |
2045 | ||
2046 | cops->get_best_match_freq = ti_sci_cmd_clk_get_match_freq; | |
2047 | cops->set_freq = ti_sci_cmd_clk_set_freq; | |
2048 | cops->get_freq = ti_sci_cmd_clk_get_freq; | |
9c19fb68 LV |
2049 | |
2050 | rm_core_ops->get_range = ti_sci_cmd_get_resource_range; | |
2051 | rm_core_ops->get_range_from_shost = | |
2052 | ti_sci_cmd_get_resource_range_from_shost; | |
997b001f LV |
2053 | |
2054 | iops->set_irq = ti_sci_cmd_set_irq; | |
2055 | iops->set_event_map = ti_sci_cmd_set_event_map; | |
2056 | iops->free_irq = ti_sci_cmd_free_irq; | |
2057 | iops->free_event_map = ti_sci_cmd_free_event_map; | |
9e7d756d NM |
2058 | } |
2059 | ||
aa276781 NM |
2060 | /** |
2061 | * ti_sci_get_handle() - Get the TI SCI handle for a device | |
2062 | * @dev: Pointer to device for which we want SCI handle | |
2063 | * | |
2064 | * NOTE: The function does not track individual clients of the framework | |
2065 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2066 | * ti_sci_put_handle must be balanced with successful ti_sci_get_handle | |
2067 | * Return: pointer to handle if successful, else: | |
2068 | * -EPROBE_DEFER if the instance is not ready | |
2069 | * -ENODEV if the required node handler is missing | |
2070 | * -EINVAL if invalid conditions are encountered. | |
2071 | */ | |
2072 | const struct ti_sci_handle *ti_sci_get_handle(struct device *dev) | |
2073 | { | |
2074 | struct device_node *ti_sci_np; | |
2075 | struct list_head *p; | |
2076 | struct ti_sci_handle *handle = NULL; | |
2077 | struct ti_sci_info *info; | |
2078 | ||
2079 | if (!dev) { | |
2080 | pr_err("I need a device pointer\n"); | |
2081 | return ERR_PTR(-EINVAL); | |
2082 | } | |
2083 | ti_sci_np = of_get_parent(dev->of_node); | |
2084 | if (!ti_sci_np) { | |
2085 | dev_err(dev, "No OF information\n"); | |
2086 | return ERR_PTR(-EINVAL); | |
2087 | } | |
2088 | ||
2089 | mutex_lock(&ti_sci_list_mutex); | |
2090 | list_for_each(p, &ti_sci_list) { | |
2091 | info = list_entry(p, struct ti_sci_info, node); | |
2092 | if (ti_sci_np == info->dev->of_node) { | |
2093 | handle = &info->handle; | |
2094 | info->users++; | |
2095 | break; | |
2096 | } | |
2097 | } | |
2098 | mutex_unlock(&ti_sci_list_mutex); | |
2099 | of_node_put(ti_sci_np); | |
2100 | ||
2101 | if (!handle) | |
2102 | return ERR_PTR(-EPROBE_DEFER); | |
2103 | ||
2104 | return handle; | |
2105 | } | |
2106 | EXPORT_SYMBOL_GPL(ti_sci_get_handle); | |
2107 | ||
2108 | /** | |
2109 | * ti_sci_put_handle() - Release the handle acquired by ti_sci_get_handle | |
2110 | * @handle: Handle acquired by ti_sci_get_handle | |
2111 | * | |
2112 | * NOTE: The function does not track individual clients of the framework | |
2113 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2114 | * ti_sci_put_handle must be balanced with successful ti_sci_get_handle | |
2115 | * | |
2116 | * Return: 0 is successfully released | |
2117 | * if an error pointer was passed, it returns the error value back, | |
2118 | * if null was passed, it returns -EINVAL; | |
2119 | */ | |
2120 | int ti_sci_put_handle(const struct ti_sci_handle *handle) | |
2121 | { | |
2122 | struct ti_sci_info *info; | |
2123 | ||
2124 | if (IS_ERR(handle)) | |
2125 | return PTR_ERR(handle); | |
2126 | if (!handle) | |
2127 | return -EINVAL; | |
2128 | ||
2129 | info = handle_to_ti_sci_info(handle); | |
2130 | mutex_lock(&ti_sci_list_mutex); | |
2131 | if (!WARN_ON(!info->users)) | |
2132 | info->users--; | |
2133 | mutex_unlock(&ti_sci_list_mutex); | |
2134 | ||
2135 | return 0; | |
2136 | } | |
2137 | EXPORT_SYMBOL_GPL(ti_sci_put_handle); | |
2138 | ||
2139 | static void devm_ti_sci_release(struct device *dev, void *res) | |
2140 | { | |
2141 | const struct ti_sci_handle **ptr = res; | |
2142 | const struct ti_sci_handle *handle = *ptr; | |
2143 | int ret; | |
2144 | ||
2145 | ret = ti_sci_put_handle(handle); | |
2146 | if (ret) | |
2147 | dev_err(dev, "failed to put handle %d\n", ret); | |
2148 | } | |
2149 | ||
2150 | /** | |
2151 | * devm_ti_sci_get_handle() - Managed get handle | |
2152 | * @dev: device for which we want SCI handle for. | |
2153 | * | |
2154 | * NOTE: This releases the handle once the device resources are | |
2155 | * no longer needed. MUST NOT BE released with ti_sci_put_handle. | |
2156 | * The function does not track individual clients of the framework | |
2157 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2158 | * | |
2159 | * Return: 0 if all went fine, else corresponding error. | |
2160 | */ | |
2161 | const struct ti_sci_handle *devm_ti_sci_get_handle(struct device *dev) | |
2162 | { | |
2163 | const struct ti_sci_handle **ptr; | |
2164 | const struct ti_sci_handle *handle; | |
2165 | ||
2166 | ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); | |
2167 | if (!ptr) | |
2168 | return ERR_PTR(-ENOMEM); | |
2169 | handle = ti_sci_get_handle(dev); | |
2170 | ||
2171 | if (!IS_ERR(handle)) { | |
2172 | *ptr = handle; | |
2173 | devres_add(dev, ptr); | |
2174 | } else { | |
2175 | devres_free(ptr); | |
2176 | } | |
2177 | ||
2178 | return handle; | |
2179 | } | |
2180 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_handle); | |
2181 | ||
905c3047 GS |
2182 | /** |
2183 | * ti_sci_get_by_phandle() - Get the TI SCI handle using DT phandle | |
2184 | * @np: device node | |
2185 | * @property: property name containing phandle on TISCI node | |
2186 | * | |
2187 | * NOTE: The function does not track individual clients of the framework | |
2188 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2189 | * ti_sci_put_handle must be balanced with successful ti_sci_get_by_phandle | |
2190 | * Return: pointer to handle if successful, else: | |
2191 | * -EPROBE_DEFER if the instance is not ready | |
2192 | * -ENODEV if the required node handler is missing | |
2193 | * -EINVAL if invalid conditions are encountered. | |
2194 | */ | |
2195 | const struct ti_sci_handle *ti_sci_get_by_phandle(struct device_node *np, | |
2196 | const char *property) | |
2197 | { | |
2198 | struct ti_sci_handle *handle = NULL; | |
2199 | struct device_node *ti_sci_np; | |
2200 | struct ti_sci_info *info; | |
2201 | struct list_head *p; | |
2202 | ||
2203 | if (!np) { | |
2204 | pr_err("I need a device pointer\n"); | |
2205 | return ERR_PTR(-EINVAL); | |
2206 | } | |
2207 | ||
2208 | ti_sci_np = of_parse_phandle(np, property, 0); | |
2209 | if (!ti_sci_np) | |
2210 | return ERR_PTR(-ENODEV); | |
2211 | ||
2212 | mutex_lock(&ti_sci_list_mutex); | |
2213 | list_for_each(p, &ti_sci_list) { | |
2214 | info = list_entry(p, struct ti_sci_info, node); | |
2215 | if (ti_sci_np == info->dev->of_node) { | |
2216 | handle = &info->handle; | |
2217 | info->users++; | |
2218 | break; | |
2219 | } | |
2220 | } | |
2221 | mutex_unlock(&ti_sci_list_mutex); | |
2222 | of_node_put(ti_sci_np); | |
2223 | ||
2224 | if (!handle) | |
2225 | return ERR_PTR(-EPROBE_DEFER); | |
2226 | ||
2227 | return handle; | |
2228 | } | |
2229 | EXPORT_SYMBOL_GPL(ti_sci_get_by_phandle); | |
2230 | ||
2231 | /** | |
2232 | * devm_ti_sci_get_by_phandle() - Managed get handle using phandle | |
2233 | * @dev: Device pointer requesting TISCI handle | |
2234 | * @property: property name containing phandle on TISCI node | |
2235 | * | |
2236 | * NOTE: This releases the handle once the device resources are | |
2237 | * no longer needed. MUST NOT BE released with ti_sci_put_handle. | |
2238 | * The function does not track individual clients of the framework | |
2239 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2240 | * | |
2241 | * Return: 0 if all went fine, else corresponding error. | |
2242 | */ | |
2243 | const struct ti_sci_handle *devm_ti_sci_get_by_phandle(struct device *dev, | |
2244 | const char *property) | |
2245 | { | |
2246 | const struct ti_sci_handle *handle; | |
2247 | const struct ti_sci_handle **ptr; | |
2248 | ||
2249 | ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); | |
2250 | if (!ptr) | |
2251 | return ERR_PTR(-ENOMEM); | |
2252 | handle = ti_sci_get_by_phandle(dev_of_node(dev), property); | |
2253 | ||
2254 | if (!IS_ERR(handle)) { | |
2255 | *ptr = handle; | |
2256 | devres_add(dev, ptr); | |
2257 | } else { | |
2258 | devres_free(ptr); | |
2259 | } | |
2260 | ||
2261 | return handle; | |
2262 | } | |
2263 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_by_phandle); | |
2264 | ||
032a1ec5 LV |
2265 | /** |
2266 | * ti_sci_get_free_resource() - Get a free resource from TISCI resource. | |
2267 | * @res: Pointer to the TISCI resource | |
2268 | * | |
2269 | * Return: resource num if all went ok else TI_SCI_RESOURCE_NULL. | |
2270 | */ | |
2271 | u16 ti_sci_get_free_resource(struct ti_sci_resource *res) | |
2272 | { | |
2273 | unsigned long flags; | |
2274 | u16 set, free_bit; | |
2275 | ||
2276 | raw_spin_lock_irqsave(&res->lock, flags); | |
2277 | for (set = 0; set < res->sets; set++) { | |
2278 | free_bit = find_first_zero_bit(res->desc[set].res_map, | |
2279 | res->desc[set].num); | |
2280 | if (free_bit != res->desc[set].num) { | |
2281 | set_bit(free_bit, res->desc[set].res_map); | |
2282 | raw_spin_unlock_irqrestore(&res->lock, flags); | |
2283 | return res->desc[set].start + free_bit; | |
2284 | } | |
2285 | } | |
2286 | raw_spin_unlock_irqrestore(&res->lock, flags); | |
2287 | ||
2288 | return TI_SCI_RESOURCE_NULL; | |
2289 | } | |
2290 | EXPORT_SYMBOL_GPL(ti_sci_get_free_resource); | |
2291 | ||
2292 | /** | |
2293 | * ti_sci_release_resource() - Release a resource from TISCI resource. | |
2294 | * @res: Pointer to the TISCI resource | |
2295 | * @id: Resource id to be released. | |
2296 | */ | |
2297 | void ti_sci_release_resource(struct ti_sci_resource *res, u16 id) | |
2298 | { | |
2299 | unsigned long flags; | |
2300 | u16 set; | |
2301 | ||
2302 | raw_spin_lock_irqsave(&res->lock, flags); | |
2303 | for (set = 0; set < res->sets; set++) { | |
2304 | if (res->desc[set].start <= id && | |
2305 | (res->desc[set].num + res->desc[set].start) > id) | |
2306 | clear_bit(id - res->desc[set].start, | |
2307 | res->desc[set].res_map); | |
2308 | } | |
2309 | raw_spin_unlock_irqrestore(&res->lock, flags); | |
2310 | } | |
2311 | EXPORT_SYMBOL_GPL(ti_sci_release_resource); | |
2312 | ||
2313 | /** | |
2314 | * ti_sci_get_num_resources() - Get the number of resources in TISCI resource | |
2315 | * @res: Pointer to the TISCI resource | |
2316 | * | |
2317 | * Return: Total number of available resources. | |
2318 | */ | |
2319 | u32 ti_sci_get_num_resources(struct ti_sci_resource *res) | |
2320 | { | |
2321 | u32 set, count = 0; | |
2322 | ||
2323 | for (set = 0; set < res->sets; set++) | |
2324 | count += res->desc[set].num; | |
2325 | ||
2326 | return count; | |
2327 | } | |
2328 | EXPORT_SYMBOL_GPL(ti_sci_get_num_resources); | |
2329 | ||
2330 | /** | |
2331 | * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device | |
2332 | * @handle: TISCI handle | |
2333 | * @dev: Device pointer to which the resource is assigned | |
2334 | * @dev_id: TISCI device id to which the resource is assigned | |
2335 | * @of_prop: property name by which the resource are represented | |
2336 | * | |
2337 | * Return: Pointer to ti_sci_resource if all went well else appropriate | |
2338 | * error pointer. | |
2339 | */ | |
2340 | struct ti_sci_resource * | |
2341 | devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle, | |
2342 | struct device *dev, u32 dev_id, char *of_prop) | |
2343 | { | |
2344 | struct ti_sci_resource *res; | |
2345 | u32 resource_subtype; | |
2346 | int i, ret; | |
2347 | ||
2348 | res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL); | |
2349 | if (!res) | |
2350 | return ERR_PTR(-ENOMEM); | |
2351 | ||
2352 | res->sets = of_property_count_elems_of_size(dev_of_node(dev), of_prop, | |
2353 | sizeof(u32)); | |
2354 | if (res->sets < 0) { | |
2355 | dev_err(dev, "%s resource type ids not available\n", of_prop); | |
2356 | return ERR_PTR(res->sets); | |
2357 | } | |
2358 | ||
2359 | res->desc = devm_kcalloc(dev, res->sets, sizeof(*res->desc), | |
2360 | GFP_KERNEL); | |
2361 | if (!res->desc) | |
2362 | return ERR_PTR(-ENOMEM); | |
2363 | ||
2364 | for (i = 0; i < res->sets; i++) { | |
2365 | ret = of_property_read_u32_index(dev_of_node(dev), of_prop, i, | |
2366 | &resource_subtype); | |
2367 | if (ret) | |
2368 | return ERR_PTR(-EINVAL); | |
2369 | ||
2370 | ret = handle->ops.rm_core_ops.get_range(handle, dev_id, | |
2371 | resource_subtype, | |
2372 | &res->desc[i].start, | |
2373 | &res->desc[i].num); | |
2374 | if (ret) { | |
2375 | dev_err(dev, "dev = %d subtype %d not allocated for this host\n", | |
2376 | dev_id, resource_subtype); | |
2377 | return ERR_PTR(ret); | |
2378 | } | |
2379 | ||
2380 | dev_dbg(dev, "dev = %d, subtype = %d, start = %d, num = %d\n", | |
2381 | dev_id, resource_subtype, res->desc[i].start, | |
2382 | res->desc[i].num); | |
2383 | ||
2384 | res->desc[i].res_map = | |
2385 | devm_kzalloc(dev, BITS_TO_LONGS(res->desc[i].num) * | |
2386 | sizeof(*res->desc[i].res_map), GFP_KERNEL); | |
2387 | if (!res->desc[i].res_map) | |
2388 | return ERR_PTR(-ENOMEM); | |
2389 | } | |
2390 | raw_spin_lock_init(&res->lock); | |
2391 | ||
2392 | return res; | |
2393 | } | |
2394 | ||
912cffb4 NM |
2395 | static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode, |
2396 | void *cmd) | |
2397 | { | |
2398 | struct ti_sci_info *info = reboot_to_ti_sci_info(nb); | |
2399 | const struct ti_sci_handle *handle = &info->handle; | |
2400 | ||
2401 | ti_sci_cmd_core_reboot(handle); | |
2402 | ||
2403 | /* call fail OR pass, we should not be here in the first place */ | |
2404 | return NOTIFY_BAD; | |
2405 | } | |
2406 | ||
aa276781 NM |
2407 | /* Description for K2G */ |
2408 | static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = { | |
e69a3553 | 2409 | .default_host_id = 2, |
aa276781 NM |
2410 | /* Conservative duration */ |
2411 | .max_rx_timeout_ms = 1000, | |
2412 | /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ | |
2413 | .max_msgs = 20, | |
2414 | .max_msg_size = 64, | |
754c9477 PU |
2415 | .rm_type_map = NULL, |
2416 | }; | |
2417 | ||
2418 | static struct ti_sci_rm_type_map ti_sci_am654_rm_type_map[] = { | |
2419 | {.dev_id = 56, .type = 0x00b}, /* GIC_IRQ */ | |
2420 | {.dev_id = 179, .type = 0x000}, /* MAIN_NAV_UDMASS_IA0 */ | |
2421 | {.dev_id = 187, .type = 0x009}, /* MAIN_NAV_RA */ | |
2422 | {.dev_id = 188, .type = 0x006}, /* MAIN_NAV_UDMAP */ | |
2423 | {.dev_id = 194, .type = 0x007}, /* MCU_NAV_UDMAP */ | |
2424 | {.dev_id = 195, .type = 0x00a}, /* MCU_NAV_RA */ | |
2425 | {.dev_id = 0, .type = 0x000}, /* end of table */ | |
2426 | }; | |
2427 | ||
2428 | /* Description for AM654 */ | |
2429 | static const struct ti_sci_desc ti_sci_pmmc_am654_desc = { | |
2430 | .default_host_id = 12, | |
2431 | /* Conservative duration */ | |
2432 | .max_rx_timeout_ms = 10000, | |
2433 | /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ | |
2434 | .max_msgs = 20, | |
2435 | .max_msg_size = 60, | |
2436 | .rm_type_map = ti_sci_am654_rm_type_map, | |
aa276781 NM |
2437 | }; |
2438 | ||
2439 | static const struct of_device_id ti_sci_of_match[] = { | |
2440 | {.compatible = "ti,k2g-sci", .data = &ti_sci_pmmc_k2g_desc}, | |
754c9477 | 2441 | {.compatible = "ti,am654-sci", .data = &ti_sci_pmmc_am654_desc}, |
aa276781 NM |
2442 | { /* Sentinel */ }, |
2443 | }; | |
2444 | MODULE_DEVICE_TABLE(of, ti_sci_of_match); | |
2445 | ||
2446 | static int ti_sci_probe(struct platform_device *pdev) | |
2447 | { | |
2448 | struct device *dev = &pdev->dev; | |
2449 | const struct of_device_id *of_id; | |
2450 | const struct ti_sci_desc *desc; | |
2451 | struct ti_sci_xfer *xfer; | |
2452 | struct ti_sci_info *info = NULL; | |
2453 | struct ti_sci_xfers_info *minfo; | |
2454 | struct mbox_client *cl; | |
2455 | int ret = -EINVAL; | |
2456 | int i; | |
912cffb4 | 2457 | int reboot = 0; |
e69a3553 | 2458 | u32 h_id; |
aa276781 NM |
2459 | |
2460 | of_id = of_match_device(ti_sci_of_match, dev); | |
2461 | if (!of_id) { | |
2462 | dev_err(dev, "OF data missing\n"); | |
2463 | return -EINVAL; | |
2464 | } | |
2465 | desc = of_id->data; | |
2466 | ||
2467 | info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); | |
2468 | if (!info) | |
2469 | return -ENOMEM; | |
2470 | ||
2471 | info->dev = dev; | |
2472 | info->desc = desc; | |
e69a3553 NM |
2473 | ret = of_property_read_u32(dev->of_node, "ti,host-id", &h_id); |
2474 | /* if the property is not present in DT, use a default from desc */ | |
2475 | if (ret < 0) { | |
2476 | info->host_id = info->desc->default_host_id; | |
2477 | } else { | |
2478 | if (!h_id) { | |
2479 | dev_warn(dev, "Host ID 0 is reserved for firmware\n"); | |
2480 | info->host_id = info->desc->default_host_id; | |
2481 | } else { | |
2482 | info->host_id = h_id; | |
2483 | } | |
2484 | } | |
2485 | ||
912cffb4 NM |
2486 | reboot = of_property_read_bool(dev->of_node, |
2487 | "ti,system-reboot-controller"); | |
aa276781 NM |
2488 | INIT_LIST_HEAD(&info->node); |
2489 | minfo = &info->minfo; | |
2490 | ||
2491 | /* | |
2492 | * Pre-allocate messages | |
2493 | * NEVER allocate more than what we can indicate in hdr.seq | |
2494 | * if we have data description bug, force a fix.. | |
2495 | */ | |
2496 | if (WARN_ON(desc->max_msgs >= | |
2497 | 1 << 8 * sizeof(((struct ti_sci_msg_hdr *)0)->seq))) | |
2498 | return -EINVAL; | |
2499 | ||
2500 | minfo->xfer_block = devm_kcalloc(dev, | |
2501 | desc->max_msgs, | |
2502 | sizeof(*minfo->xfer_block), | |
2503 | GFP_KERNEL); | |
2504 | if (!minfo->xfer_block) | |
2505 | return -ENOMEM; | |
2506 | ||
a86854d0 KC |
2507 | minfo->xfer_alloc_table = devm_kcalloc(dev, |
2508 | BITS_TO_LONGS(desc->max_msgs), | |
2509 | sizeof(unsigned long), | |
aa276781 NM |
2510 | GFP_KERNEL); |
2511 | if (!minfo->xfer_alloc_table) | |
2512 | return -ENOMEM; | |
2513 | bitmap_zero(minfo->xfer_alloc_table, desc->max_msgs); | |
2514 | ||
2515 | /* Pre-initialize the buffer pointer to pre-allocated buffers */ | |
2516 | for (i = 0, xfer = minfo->xfer_block; i < desc->max_msgs; i++, xfer++) { | |
2517 | xfer->xfer_buf = devm_kcalloc(dev, 1, desc->max_msg_size, | |
2518 | GFP_KERNEL); | |
2519 | if (!xfer->xfer_buf) | |
2520 | return -ENOMEM; | |
2521 | ||
2522 | xfer->tx_message.buf = xfer->xfer_buf; | |
2523 | init_completion(&xfer->done); | |
2524 | } | |
2525 | ||
2526 | ret = ti_sci_debugfs_create(pdev, info); | |
2527 | if (ret) | |
2528 | dev_warn(dev, "Failed to create debug file\n"); | |
2529 | ||
2530 | platform_set_drvdata(pdev, info); | |
2531 | ||
2532 | cl = &info->cl; | |
2533 | cl->dev = dev; | |
2534 | cl->tx_block = false; | |
2535 | cl->rx_callback = ti_sci_rx_callback; | |
2536 | cl->knows_txdone = true; | |
2537 | ||
2538 | spin_lock_init(&minfo->xfer_lock); | |
2539 | sema_init(&minfo->sem_xfer_count, desc->max_msgs); | |
2540 | ||
2541 | info->chan_rx = mbox_request_channel_byname(cl, "rx"); | |
2542 | if (IS_ERR(info->chan_rx)) { | |
2543 | ret = PTR_ERR(info->chan_rx); | |
2544 | goto out; | |
2545 | } | |
2546 | ||
2547 | info->chan_tx = mbox_request_channel_byname(cl, "tx"); | |
2548 | if (IS_ERR(info->chan_tx)) { | |
2549 | ret = PTR_ERR(info->chan_tx); | |
2550 | goto out; | |
2551 | } | |
2552 | ret = ti_sci_cmd_get_revision(info); | |
2553 | if (ret) { | |
2554 | dev_err(dev, "Unable to communicate with TISCI(%d)\n", ret); | |
2555 | goto out; | |
2556 | } | |
2557 | ||
9e7d756d NM |
2558 | ti_sci_setup_ops(info); |
2559 | ||
912cffb4 NM |
2560 | if (reboot) { |
2561 | info->nb.notifier_call = tisci_reboot_handler; | |
2562 | info->nb.priority = 128; | |
2563 | ||
2564 | ret = register_restart_handler(&info->nb); | |
2565 | if (ret) { | |
2566 | dev_err(dev, "reboot registration fail(%d)\n", ret); | |
2567 | return ret; | |
2568 | } | |
2569 | } | |
2570 | ||
aa276781 NM |
2571 | dev_info(dev, "ABI: %d.%d (firmware rev 0x%04x '%s')\n", |
2572 | info->handle.version.abi_major, info->handle.version.abi_minor, | |
2573 | info->handle.version.firmware_revision, | |
2574 | info->handle.version.firmware_description); | |
2575 | ||
2576 | mutex_lock(&ti_sci_list_mutex); | |
2577 | list_add_tail(&info->node, &ti_sci_list); | |
2578 | mutex_unlock(&ti_sci_list_mutex); | |
2579 | ||
2580 | return of_platform_populate(dev->of_node, NULL, NULL, dev); | |
2581 | out: | |
2582 | if (!IS_ERR(info->chan_tx)) | |
2583 | mbox_free_channel(info->chan_tx); | |
2584 | if (!IS_ERR(info->chan_rx)) | |
2585 | mbox_free_channel(info->chan_rx); | |
2586 | debugfs_remove(info->d); | |
2587 | return ret; | |
2588 | } | |
2589 | ||
2590 | static int ti_sci_remove(struct platform_device *pdev) | |
2591 | { | |
2592 | struct ti_sci_info *info; | |
2593 | struct device *dev = &pdev->dev; | |
2594 | int ret = 0; | |
2595 | ||
2596 | of_platform_depopulate(dev); | |
2597 | ||
2598 | info = platform_get_drvdata(pdev); | |
2599 | ||
912cffb4 NM |
2600 | if (info->nb.notifier_call) |
2601 | unregister_restart_handler(&info->nb); | |
2602 | ||
aa276781 NM |
2603 | mutex_lock(&ti_sci_list_mutex); |
2604 | if (info->users) | |
2605 | ret = -EBUSY; | |
2606 | else | |
2607 | list_del(&info->node); | |
2608 | mutex_unlock(&ti_sci_list_mutex); | |
2609 | ||
2610 | if (!ret) { | |
2611 | ti_sci_debugfs_destroy(pdev, info); | |
2612 | ||
2613 | /* Safe to free channels since no more users */ | |
2614 | mbox_free_channel(info->chan_tx); | |
2615 | mbox_free_channel(info->chan_rx); | |
2616 | } | |
2617 | ||
2618 | return ret; | |
2619 | } | |
2620 | ||
2621 | static struct platform_driver ti_sci_driver = { | |
2622 | .probe = ti_sci_probe, | |
2623 | .remove = ti_sci_remove, | |
2624 | .driver = { | |
2625 | .name = "ti-sci", | |
2626 | .of_match_table = of_match_ptr(ti_sci_of_match), | |
2627 | }, | |
2628 | }; | |
2629 | module_platform_driver(ti_sci_driver); | |
2630 | ||
2631 | MODULE_LICENSE("GPL v2"); | |
2632 | MODULE_DESCRIPTION("TI System Control Interface(SCI) driver"); | |
2633 | MODULE_AUTHOR("Nishanth Menon"); | |
2634 | MODULE_ALIAS("platform:ti-sci"); |