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1e0a6014 | 1 | // SPDX-License-Identifier: GPL-2.0 |
aa276781 NM |
2 | /* |
3 | * Texas Instruments System Control Interface Protocol Driver | |
4 | * | |
b9e8a7d9 | 5 | * Copyright (C) 2015-2022 Texas Instruments Incorporated - https://www.ti.com/ |
aa276781 | 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> | |
b9e8a7d9 | 15 | #include <linux/iopoll.h> |
aa276781 NM |
16 | #include <linux/kernel.h> |
17 | #include <linux/mailbox_client.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of_device.h> | |
20 | #include <linux/semaphore.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/soc/ti/ti-msgmgr.h> | |
23 | #include <linux/soc/ti/ti_sci_protocol.h> | |
912cffb4 | 24 | #include <linux/reboot.h> |
aa276781 NM |
25 | |
26 | #include "ti_sci.h" | |
27 | ||
28 | /* List of all TI SCI devices active in system */ | |
29 | static LIST_HEAD(ti_sci_list); | |
30 | /* Protection for the entire list */ | |
31 | static DEFINE_MUTEX(ti_sci_list_mutex); | |
32 | ||
33 | /** | |
34 | * struct ti_sci_xfer - Structure representing a message flow | |
35 | * @tx_message: Transmit message | |
36 | * @rx_len: Receive message length | |
37 | * @xfer_buf: Preallocated buffer to store receive message | |
38 | * Since we work with request-ACK protocol, we can | |
39 | * reuse the same buffer for the rx path as we | |
40 | * use for the tx path. | |
41 | * @done: completion event | |
42 | */ | |
43 | struct ti_sci_xfer { | |
44 | struct ti_msgmgr_message tx_message; | |
45 | u8 rx_len; | |
46 | u8 *xfer_buf; | |
47 | struct completion done; | |
48 | }; | |
49 | ||
50 | /** | |
51 | * struct ti_sci_xfers_info - Structure to manage transfer information | |
52 | * @sem_xfer_count: Counting Semaphore for managing max simultaneous | |
53 | * Messages. | |
54 | * @xfer_block: Preallocated Message array | |
55 | * @xfer_alloc_table: Bitmap table for allocated messages. | |
56 | * Index of this bitmap table is also used for message | |
57 | * sequence identifier. | |
58 | * @xfer_lock: Protection for message allocation | |
59 | */ | |
60 | struct ti_sci_xfers_info { | |
61 | struct semaphore sem_xfer_count; | |
62 | struct ti_sci_xfer *xfer_block; | |
63 | unsigned long *xfer_alloc_table; | |
64 | /* protect transfer allocation */ | |
65 | spinlock_t xfer_lock; | |
66 | }; | |
67 | ||
68 | /** | |
69 | * struct ti_sci_desc - Description of SoC integration | |
e69a3553 | 70 | * @default_host_id: Host identifier representing the compute entity |
aa276781 NM |
71 | * @max_rx_timeout_ms: Timeout for communication with SoC (in Milliseconds) |
72 | * @max_msgs: Maximum number of messages that can be pending | |
73 | * simultaneously in the system | |
74 | * @max_msg_size: Maximum size of data per message that can be handled. | |
75 | */ | |
76 | struct ti_sci_desc { | |
e69a3553 | 77 | u8 default_host_id; |
aa276781 NM |
78 | int max_rx_timeout_ms; |
79 | int max_msgs; | |
80 | int max_msg_size; | |
81 | }; | |
82 | ||
83 | /** | |
84 | * struct ti_sci_info - Structure representing a TI SCI instance | |
85 | * @dev: Device pointer | |
86 | * @desc: SoC description for this instance | |
912cffb4 | 87 | * @nb: Reboot Notifier block |
aa276781 NM |
88 | * @d: Debugfs file entry |
89 | * @debug_region: Memory region where the debug message are available | |
90 | * @debug_region_size: Debug region size | |
91 | * @debug_buffer: Buffer allocated to copy debug messages. | |
92 | * @handle: Instance of TI SCI handle to send to clients. | |
93 | * @cl: Mailbox Client | |
94 | * @chan_tx: Transmit mailbox channel | |
95 | * @chan_rx: Receive mailbox channel | |
96 | * @minfo: Message info | |
97 | * @node: list head | |
e69a3553 | 98 | * @host_id: Host ID |
aa276781 NM |
99 | * @users: Number of users of this instance |
100 | */ | |
101 | struct ti_sci_info { | |
102 | struct device *dev; | |
912cffb4 | 103 | struct notifier_block nb; |
aa276781 NM |
104 | const struct ti_sci_desc *desc; |
105 | struct dentry *d; | |
106 | void __iomem *debug_region; | |
107 | char *debug_buffer; | |
108 | size_t debug_region_size; | |
109 | struct ti_sci_handle handle; | |
110 | struct mbox_client cl; | |
111 | struct mbox_chan *chan_tx; | |
112 | struct mbox_chan *chan_rx; | |
113 | struct ti_sci_xfers_info minfo; | |
114 | struct list_head node; | |
e69a3553 | 115 | u8 host_id; |
aa276781 NM |
116 | /* protected by ti_sci_list_mutex */ |
117 | int users; | |
118 | }; | |
119 | ||
120 | #define cl_to_ti_sci_info(c) container_of(c, struct ti_sci_info, cl) | |
121 | #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle) | |
912cffb4 | 122 | #define reboot_to_ti_sci_info(n) container_of(n, struct ti_sci_info, nb) |
aa276781 NM |
123 | |
124 | #ifdef CONFIG_DEBUG_FS | |
125 | ||
126 | /** | |
127 | * ti_sci_debug_show() - Helper to dump the debug log | |
128 | * @s: sequence file pointer | |
129 | * @unused: unused. | |
130 | * | |
131 | * Return: 0 | |
132 | */ | |
133 | static int ti_sci_debug_show(struct seq_file *s, void *unused) | |
134 | { | |
135 | struct ti_sci_info *info = s->private; | |
136 | ||
137 | memcpy_fromio(info->debug_buffer, info->debug_region, | |
138 | info->debug_region_size); | |
139 | /* | |
140 | * We don't trust firmware to leave NULL terminated last byte (hence | |
141 | * we have allocated 1 extra 0 byte). Since we cannot guarantee any | |
142 | * specific data format for debug messages, We just present the data | |
143 | * in the buffer as is - we expect the messages to be self explanatory. | |
144 | */ | |
145 | seq_puts(s, info->debug_buffer); | |
146 | return 0; | |
147 | } | |
148 | ||
5953c887 YL |
149 | /* Provide the log file operations interface*/ |
150 | DEFINE_SHOW_ATTRIBUTE(ti_sci_debug); | |
aa276781 NM |
151 | |
152 | /** | |
153 | * ti_sci_debugfs_create() - Create log debug file | |
154 | * @pdev: platform device pointer | |
155 | * @info: Pointer to SCI entity information | |
156 | * | |
157 | * Return: 0 if all went fine, else corresponding error. | |
158 | */ | |
159 | static int ti_sci_debugfs_create(struct platform_device *pdev, | |
160 | struct ti_sci_info *info) | |
161 | { | |
162 | struct device *dev = &pdev->dev; | |
163 | struct resource *res; | |
164 | char debug_name[50] = "ti_sci_debug@"; | |
165 | ||
166 | /* Debug region is optional */ | |
167 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, | |
168 | "debug_messages"); | |
169 | info->debug_region = devm_ioremap_resource(dev, res); | |
170 | if (IS_ERR(info->debug_region)) | |
171 | return 0; | |
172 | info->debug_region_size = resource_size(res); | |
173 | ||
174 | info->debug_buffer = devm_kcalloc(dev, info->debug_region_size + 1, | |
175 | sizeof(char), GFP_KERNEL); | |
176 | if (!info->debug_buffer) | |
177 | return -ENOMEM; | |
178 | /* Setup NULL termination */ | |
179 | info->debug_buffer[info->debug_region_size] = 0; | |
180 | ||
181 | info->d = debugfs_create_file(strncat(debug_name, dev_name(dev), | |
76cefef8 AB |
182 | sizeof(debug_name) - |
183 | sizeof("ti_sci_debug@")), | |
aa276781 NM |
184 | 0444, NULL, info, &ti_sci_debug_fops); |
185 | if (IS_ERR(info->d)) | |
186 | return PTR_ERR(info->d); | |
187 | ||
188 | dev_dbg(dev, "Debug region => %p, size = %zu bytes, resource: %pr\n", | |
189 | info->debug_region, info->debug_region_size, res); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | /** | |
194 | * ti_sci_debugfs_destroy() - clean up log debug file | |
195 | * @pdev: platform device pointer | |
196 | * @info: Pointer to SCI entity information | |
197 | */ | |
198 | static void ti_sci_debugfs_destroy(struct platform_device *pdev, | |
199 | struct ti_sci_info *info) | |
200 | { | |
201 | if (IS_ERR(info->debug_region)) | |
202 | return; | |
203 | ||
204 | debugfs_remove(info->d); | |
205 | } | |
206 | #else /* CONFIG_DEBUG_FS */ | |
207 | static inline int ti_sci_debugfs_create(struct platform_device *dev, | |
208 | struct ti_sci_info *info) | |
209 | { | |
210 | return 0; | |
211 | } | |
212 | ||
213 | static inline void ti_sci_debugfs_destroy(struct platform_device *dev, | |
214 | struct ti_sci_info *info) | |
215 | { | |
216 | } | |
217 | #endif /* CONFIG_DEBUG_FS */ | |
218 | ||
219 | /** | |
220 | * ti_sci_dump_header_dbg() - Helper to dump a message header. | |
221 | * @dev: Device pointer corresponding to the SCI entity | |
222 | * @hdr: pointer to header. | |
223 | */ | |
224 | static inline void ti_sci_dump_header_dbg(struct device *dev, | |
225 | struct ti_sci_msg_hdr *hdr) | |
226 | { | |
227 | dev_dbg(dev, "MSGHDR:type=0x%04x host=0x%02x seq=0x%02x flags=0x%08x\n", | |
228 | hdr->type, hdr->host, hdr->seq, hdr->flags); | |
229 | } | |
230 | ||
231 | /** | |
232 | * ti_sci_rx_callback() - mailbox client callback for receive messages | |
233 | * @cl: client pointer | |
234 | * @m: mailbox message | |
235 | * | |
236 | * Processes one received message to appropriate transfer information and | |
237 | * signals completion of the transfer. | |
238 | * | |
239 | * NOTE: This function will be invoked in IRQ context, hence should be | |
240 | * as optimal as possible. | |
241 | */ | |
242 | static void ti_sci_rx_callback(struct mbox_client *cl, void *m) | |
243 | { | |
244 | struct ti_sci_info *info = cl_to_ti_sci_info(cl); | |
245 | struct device *dev = info->dev; | |
246 | struct ti_sci_xfers_info *minfo = &info->minfo; | |
247 | struct ti_msgmgr_message *mbox_msg = m; | |
248 | struct ti_sci_msg_hdr *hdr = (struct ti_sci_msg_hdr *)mbox_msg->buf; | |
249 | struct ti_sci_xfer *xfer; | |
250 | u8 xfer_id; | |
251 | ||
252 | xfer_id = hdr->seq; | |
253 | ||
254 | /* | |
255 | * Are we even expecting this? | |
256 | * NOTE: barriers were implicit in locks used for modifying the bitmap | |
257 | */ | |
258 | if (!test_bit(xfer_id, minfo->xfer_alloc_table)) { | |
259 | dev_err(dev, "Message for %d is not expected!\n", xfer_id); | |
260 | return; | |
261 | } | |
262 | ||
263 | xfer = &minfo->xfer_block[xfer_id]; | |
264 | ||
265 | /* Is the message of valid length? */ | |
266 | if (mbox_msg->len > info->desc->max_msg_size) { | |
bd0fa74e | 267 | dev_err(dev, "Unable to handle %zu xfer(max %d)\n", |
aa276781 NM |
268 | mbox_msg->len, info->desc->max_msg_size); |
269 | ti_sci_dump_header_dbg(dev, hdr); | |
270 | return; | |
271 | } | |
272 | if (mbox_msg->len < xfer->rx_len) { | |
bd0fa74e | 273 | dev_err(dev, "Recv xfer %zu < expected %d length\n", |
aa276781 NM |
274 | mbox_msg->len, xfer->rx_len); |
275 | ti_sci_dump_header_dbg(dev, hdr); | |
276 | return; | |
277 | } | |
278 | ||
279 | ti_sci_dump_header_dbg(dev, hdr); | |
280 | /* Take a copy to the rx buffer.. */ | |
281 | memcpy(xfer->xfer_buf, mbox_msg->buf, xfer->rx_len); | |
282 | complete(&xfer->done); | |
283 | } | |
284 | ||
285 | /** | |
286 | * ti_sci_get_one_xfer() - Allocate one message | |
287 | * @info: Pointer to SCI entity information | |
288 | * @msg_type: Message type | |
289 | * @msg_flags: Flag to set for the message | |
290 | * @tx_message_size: transmit message size | |
291 | * @rx_message_size: receive message size | |
292 | * | |
293 | * Helper function which is used by various command functions that are | |
294 | * exposed to clients of this driver for allocating a message traffic event. | |
295 | * | |
296 | * This function can sleep depending on pending requests already in the system | |
297 | * for the SCI entity. Further, this also holds a spinlock to maintain integrity | |
298 | * of internal data structures. | |
299 | * | |
300 | * Return: 0 if all went fine, else corresponding error. | |
301 | */ | |
302 | static struct ti_sci_xfer *ti_sci_get_one_xfer(struct ti_sci_info *info, | |
303 | u16 msg_type, u32 msg_flags, | |
304 | size_t tx_message_size, | |
305 | size_t rx_message_size) | |
306 | { | |
307 | struct ti_sci_xfers_info *minfo = &info->minfo; | |
308 | struct ti_sci_xfer *xfer; | |
309 | struct ti_sci_msg_hdr *hdr; | |
310 | unsigned long flags; | |
311 | unsigned long bit_pos; | |
312 | u8 xfer_id; | |
313 | int ret; | |
314 | int timeout; | |
315 | ||
316 | /* Ensure we have sane transfer sizes */ | |
317 | if (rx_message_size > info->desc->max_msg_size || | |
318 | tx_message_size > info->desc->max_msg_size || | |
319 | rx_message_size < sizeof(*hdr) || tx_message_size < sizeof(*hdr)) | |
320 | return ERR_PTR(-ERANGE); | |
321 | ||
322 | /* | |
323 | * Ensure we have only controlled number of pending messages. | |
324 | * Ideally, we might just have to wait a single message, be | |
325 | * conservative and wait 5 times that.. | |
326 | */ | |
327 | timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms) * 5; | |
328 | ret = down_timeout(&minfo->sem_xfer_count, timeout); | |
329 | if (ret < 0) | |
330 | return ERR_PTR(ret); | |
331 | ||
332 | /* Keep the locked section as small as possible */ | |
333 | spin_lock_irqsave(&minfo->xfer_lock, flags); | |
334 | bit_pos = find_first_zero_bit(minfo->xfer_alloc_table, | |
335 | info->desc->max_msgs); | |
336 | set_bit(bit_pos, minfo->xfer_alloc_table); | |
337 | spin_unlock_irqrestore(&minfo->xfer_lock, flags); | |
338 | ||
339 | /* | |
340 | * We already ensured in probe that we can have max messages that can | |
341 | * fit in hdr.seq - NOTE: this improves access latencies | |
342 | * to predictable O(1) access, BUT, it opens us to risk if | |
343 | * remote misbehaves with corrupted message sequence responses. | |
344 | * If that happens, we are going to be messed up anyways.. | |
345 | */ | |
346 | xfer_id = (u8)bit_pos; | |
347 | ||
348 | xfer = &minfo->xfer_block[xfer_id]; | |
349 | ||
350 | hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
351 | xfer->tx_message.len = tx_message_size; | |
b9e8a7d9 DG |
352 | xfer->tx_message.chan_rx = info->chan_rx; |
353 | xfer->tx_message.timeout_rx_ms = info->desc->max_rx_timeout_ms; | |
aa276781 NM |
354 | xfer->rx_len = (u8)rx_message_size; |
355 | ||
356 | reinit_completion(&xfer->done); | |
357 | ||
358 | hdr->seq = xfer_id; | |
359 | hdr->type = msg_type; | |
e69a3553 | 360 | hdr->host = info->host_id; |
aa276781 NM |
361 | hdr->flags = msg_flags; |
362 | ||
363 | return xfer; | |
364 | } | |
365 | ||
366 | /** | |
367 | * ti_sci_put_one_xfer() - Release a message | |
368 | * @minfo: transfer info pointer | |
369 | * @xfer: message that was reserved by ti_sci_get_one_xfer | |
370 | * | |
371 | * This holds a spinlock to maintain integrity of internal data structures. | |
372 | */ | |
373 | static void ti_sci_put_one_xfer(struct ti_sci_xfers_info *minfo, | |
374 | struct ti_sci_xfer *xfer) | |
375 | { | |
376 | unsigned long flags; | |
377 | struct ti_sci_msg_hdr *hdr; | |
378 | u8 xfer_id; | |
379 | ||
380 | hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
381 | xfer_id = hdr->seq; | |
382 | ||
383 | /* | |
384 | * Keep the locked section as small as possible | |
385 | * NOTE: we might escape with smp_mb and no lock here.. | |
386 | * but just be conservative and symmetric. | |
387 | */ | |
388 | spin_lock_irqsave(&minfo->xfer_lock, flags); | |
389 | clear_bit(xfer_id, minfo->xfer_alloc_table); | |
390 | spin_unlock_irqrestore(&minfo->xfer_lock, flags); | |
391 | ||
392 | /* Increment the count for the next user to get through */ | |
393 | up(&minfo->sem_xfer_count); | |
394 | } | |
395 | ||
396 | /** | |
397 | * ti_sci_do_xfer() - Do one transfer | |
398 | * @info: Pointer to SCI entity information | |
399 | * @xfer: Transfer to initiate and wait for response | |
400 | * | |
401 | * Return: -ETIMEDOUT in case of no response, if transmit error, | |
402 | * return corresponding error, else if all goes well, | |
403 | * return 0. | |
404 | */ | |
405 | static inline int ti_sci_do_xfer(struct ti_sci_info *info, | |
406 | struct ti_sci_xfer *xfer) | |
407 | { | |
408 | int ret; | |
409 | int timeout; | |
410 | struct device *dev = info->dev; | |
b9e8a7d9 | 411 | bool done_state = true; |
aa276781 NM |
412 | |
413 | ret = mbox_send_message(info->chan_tx, &xfer->tx_message); | |
414 | if (ret < 0) | |
415 | return ret; | |
416 | ||
417 | ret = 0; | |
418 | ||
9225bcde | 419 | if (system_state <= SYSTEM_RUNNING) { |
b9e8a7d9 DG |
420 | /* And we wait for the response. */ |
421 | timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms); | |
422 | if (!wait_for_completion_timeout(&xfer->done, timeout)) | |
423 | ret = -ETIMEDOUT; | |
424 | } else { | |
425 | /* | |
9225bcde | 426 | * If we are !running, we cannot use wait_for_completion_timeout |
b9e8a7d9 DG |
427 | * during noirq phase, so we must manually poll the completion. |
428 | */ | |
429 | ret = read_poll_timeout_atomic(try_wait_for_completion, done_state, | |
b13b2c3e | 430 | done_state, 1, |
b9e8a7d9 DG |
431 | info->desc->max_rx_timeout_ms * 1000, |
432 | false, &xfer->done); | |
433 | } | |
434 | ||
b13b2c3e | 435 | if (ret == -ETIMEDOUT) |
595f3a9d | 436 | dev_err(dev, "Mbox timedout in resp(caller: %pS)\n", |
aa276781 | 437 | (void *)_RET_IP_); |
b9e8a7d9 | 438 | |
aa276781 NM |
439 | /* |
440 | * NOTE: we might prefer not to need the mailbox ticker to manage the | |
441 | * transfer queueing since the protocol layer queues things by itself. | |
442 | * Unfortunately, we have to kick the mailbox framework after we have | |
443 | * received our message. | |
444 | */ | |
445 | mbox_client_txdone(info->chan_tx, ret); | |
446 | ||
447 | return ret; | |
448 | } | |
449 | ||
450 | /** | |
451 | * ti_sci_cmd_get_revision() - command to get the revision of the SCI entity | |
452 | * @info: Pointer to SCI entity information | |
453 | * | |
454 | * Updates the SCI information in the internal data structure. | |
455 | * | |
456 | * Return: 0 if all went fine, else return appropriate error. | |
457 | */ | |
458 | static int ti_sci_cmd_get_revision(struct ti_sci_info *info) | |
459 | { | |
460 | struct device *dev = info->dev; | |
461 | struct ti_sci_handle *handle = &info->handle; | |
462 | struct ti_sci_version_info *ver = &handle->version; | |
463 | struct ti_sci_msg_resp_version *rev_info; | |
464 | struct ti_sci_xfer *xfer; | |
465 | int ret; | |
466 | ||
aa276781 | 467 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_VERSION, |
66f030ea AD |
468 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, |
469 | sizeof(struct ti_sci_msg_hdr), | |
aa276781 NM |
470 | sizeof(*rev_info)); |
471 | if (IS_ERR(xfer)) { | |
472 | ret = PTR_ERR(xfer); | |
473 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
474 | return ret; | |
475 | } | |
476 | ||
477 | rev_info = (struct ti_sci_msg_resp_version *)xfer->xfer_buf; | |
478 | ||
479 | ret = ti_sci_do_xfer(info, xfer); | |
480 | if (ret) { | |
481 | dev_err(dev, "Mbox send fail %d\n", ret); | |
482 | goto fail; | |
483 | } | |
484 | ||
485 | ver->abi_major = rev_info->abi_major; | |
486 | ver->abi_minor = rev_info->abi_minor; | |
487 | ver->firmware_revision = rev_info->firmware_revision; | |
488 | strncpy(ver->firmware_description, rev_info->firmware_description, | |
489 | sizeof(ver->firmware_description)); | |
490 | ||
491 | fail: | |
492 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
493 | return ret; | |
494 | } | |
495 | ||
9e7d756d NM |
496 | /** |
497 | * ti_sci_is_response_ack() - Generic ACK/NACK message checkup | |
498 | * @r: pointer to response buffer | |
499 | * | |
500 | * Return: true if the response was an ACK, else returns false. | |
501 | */ | |
502 | static inline bool ti_sci_is_response_ack(void *r) | |
503 | { | |
504 | struct ti_sci_msg_hdr *hdr = r; | |
505 | ||
506 | return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false; | |
507 | } | |
508 | ||
509 | /** | |
510 | * ti_sci_set_device_state() - Set device state helper | |
511 | * @handle: pointer to TI SCI handle | |
512 | * @id: Device identifier | |
513 | * @flags: flags to setup for the device | |
514 | * @state: State to move the device to | |
515 | * | |
516 | * Return: 0 if all went well, else returns appropriate error value. | |
517 | */ | |
518 | static int ti_sci_set_device_state(const struct ti_sci_handle *handle, | |
519 | u32 id, u32 flags, u8 state) | |
520 | { | |
521 | struct ti_sci_info *info; | |
522 | struct ti_sci_msg_req_set_device_state *req; | |
523 | struct ti_sci_msg_hdr *resp; | |
524 | struct ti_sci_xfer *xfer; | |
525 | struct device *dev; | |
526 | int ret = 0; | |
527 | ||
528 | if (IS_ERR(handle)) | |
529 | return PTR_ERR(handle); | |
530 | if (!handle) | |
531 | return -EINVAL; | |
532 | ||
533 | info = handle_to_ti_sci_info(handle); | |
534 | dev = info->dev; | |
535 | ||
536 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_DEVICE_STATE, | |
537 | flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
538 | sizeof(*req), sizeof(*resp)); | |
539 | if (IS_ERR(xfer)) { | |
540 | ret = PTR_ERR(xfer); | |
541 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
542 | return ret; | |
543 | } | |
544 | req = (struct ti_sci_msg_req_set_device_state *)xfer->xfer_buf; | |
545 | req->id = id; | |
546 | req->state = state; | |
547 | ||
548 | ret = ti_sci_do_xfer(info, xfer); | |
549 | if (ret) { | |
550 | dev_err(dev, "Mbox send fail %d\n", ret); | |
551 | goto fail; | |
552 | } | |
553 | ||
554 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
555 | ||
556 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
557 | ||
558 | fail: | |
559 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | /** | |
565 | * ti_sci_get_device_state() - Get device state helper | |
566 | * @handle: Handle to the device | |
567 | * @id: Device Identifier | |
568 | * @clcnt: Pointer to Context Loss Count | |
569 | * @resets: pointer to resets | |
570 | * @p_state: pointer to p_state | |
571 | * @c_state: pointer to c_state | |
572 | * | |
573 | * Return: 0 if all went fine, else return appropriate error. | |
574 | */ | |
575 | static int ti_sci_get_device_state(const struct ti_sci_handle *handle, | |
576 | u32 id, u32 *clcnt, u32 *resets, | |
577 | u8 *p_state, u8 *c_state) | |
578 | { | |
579 | struct ti_sci_info *info; | |
580 | struct ti_sci_msg_req_get_device_state *req; | |
581 | struct ti_sci_msg_resp_get_device_state *resp; | |
582 | struct ti_sci_xfer *xfer; | |
583 | struct device *dev; | |
584 | int ret = 0; | |
585 | ||
586 | if (IS_ERR(handle)) | |
587 | return PTR_ERR(handle); | |
588 | if (!handle) | |
589 | return -EINVAL; | |
590 | ||
591 | if (!clcnt && !resets && !p_state && !c_state) | |
592 | return -EINVAL; | |
593 | ||
594 | info = handle_to_ti_sci_info(handle); | |
595 | dev = info->dev; | |
596 | ||
9e7d756d | 597 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_DEVICE_STATE, |
66f030ea AD |
598 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, |
599 | sizeof(*req), sizeof(*resp)); | |
9e7d756d NM |
600 | if (IS_ERR(xfer)) { |
601 | ret = PTR_ERR(xfer); | |
602 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
603 | return ret; | |
604 | } | |
605 | req = (struct ti_sci_msg_req_get_device_state *)xfer->xfer_buf; | |
606 | req->id = id; | |
607 | ||
608 | ret = ti_sci_do_xfer(info, xfer); | |
609 | if (ret) { | |
610 | dev_err(dev, "Mbox send fail %d\n", ret); | |
611 | goto fail; | |
612 | } | |
613 | ||
614 | resp = (struct ti_sci_msg_resp_get_device_state *)xfer->xfer_buf; | |
615 | if (!ti_sci_is_response_ack(resp)) { | |
616 | ret = -ENODEV; | |
617 | goto fail; | |
618 | } | |
619 | ||
620 | if (clcnt) | |
621 | *clcnt = resp->context_loss_count; | |
622 | if (resets) | |
623 | *resets = resp->resets; | |
624 | if (p_state) | |
625 | *p_state = resp->programmed_state; | |
626 | if (c_state) | |
627 | *c_state = resp->current_state; | |
628 | fail: | |
629 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
630 | ||
631 | return ret; | |
632 | } | |
633 | ||
634 | /** | |
635 | * ti_sci_cmd_get_device() - command to request for device managed by TISCI | |
45b659ee | 636 | * that can be shared with other hosts. |
9e7d756d NM |
637 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle |
638 | * @id: Device Identifier | |
639 | * | |
640 | * Request for the device - NOTE: the client MUST maintain integrity of | |
641 | * usage count by balancing get_device with put_device. No refcounting is | |
642 | * managed by driver for that purpose. | |
643 | * | |
9e7d756d NM |
644 | * Return: 0 if all went fine, else return appropriate error. |
645 | */ | |
646 | static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id) | |
45b659ee LV |
647 | { |
648 | return ti_sci_set_device_state(handle, id, 0, | |
649 | MSG_DEVICE_SW_STATE_ON); | |
650 | } | |
651 | ||
652 | /** | |
653 | * ti_sci_cmd_get_device_exclusive() - command to request for device managed by | |
654 | * TISCI that is exclusively owned by the | |
655 | * requesting host. | |
656 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
657 | * @id: Device Identifier | |
658 | * | |
659 | * Request for the device - NOTE: the client MUST maintain integrity of | |
660 | * usage count by balancing get_device with put_device. No refcounting is | |
661 | * managed by driver for that purpose. | |
662 | * | |
663 | * Return: 0 if all went fine, else return appropriate error. | |
664 | */ | |
665 | static int ti_sci_cmd_get_device_exclusive(const struct ti_sci_handle *handle, | |
666 | u32 id) | |
9e7d756d NM |
667 | { |
668 | return ti_sci_set_device_state(handle, id, | |
669 | MSG_FLAG_DEVICE_EXCLUSIVE, | |
670 | MSG_DEVICE_SW_STATE_ON); | |
671 | } | |
672 | ||
673 | /** | |
674 | * ti_sci_cmd_idle_device() - Command to idle a device managed by TISCI | |
675 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
676 | * @id: Device Identifier | |
677 | * | |
678 | * Request for the device - NOTE: the client MUST maintain integrity of | |
679 | * usage count by balancing get_device with put_device. No refcounting is | |
680 | * managed by driver for that purpose. | |
681 | * | |
682 | * Return: 0 if all went fine, else return appropriate error. | |
683 | */ | |
684 | static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id) | |
45b659ee LV |
685 | { |
686 | return ti_sci_set_device_state(handle, id, 0, | |
687 | MSG_DEVICE_SW_STATE_RETENTION); | |
688 | } | |
689 | ||
690 | /** | |
691 | * ti_sci_cmd_idle_device_exclusive() - Command to idle a device managed by | |
692 | * TISCI that is exclusively owned by | |
693 | * requesting host. | |
694 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
695 | * @id: Device Identifier | |
696 | * | |
697 | * Request for the device - NOTE: the client MUST maintain integrity of | |
698 | * usage count by balancing get_device with put_device. No refcounting is | |
699 | * managed by driver for that purpose. | |
700 | * | |
701 | * Return: 0 if all went fine, else return appropriate error. | |
702 | */ | |
703 | static int ti_sci_cmd_idle_device_exclusive(const struct ti_sci_handle *handle, | |
704 | u32 id) | |
9e7d756d NM |
705 | { |
706 | return ti_sci_set_device_state(handle, id, | |
707 | MSG_FLAG_DEVICE_EXCLUSIVE, | |
708 | MSG_DEVICE_SW_STATE_RETENTION); | |
709 | } | |
710 | ||
711 | /** | |
712 | * ti_sci_cmd_put_device() - command to release a device managed by TISCI | |
713 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
714 | * @id: Device Identifier | |
715 | * | |
716 | * Request for the device - NOTE: the client MUST maintain integrity of | |
717 | * usage count by balancing get_device with put_device. No refcounting is | |
718 | * managed by driver for that purpose. | |
719 | * | |
720 | * Return: 0 if all went fine, else return appropriate error. | |
721 | */ | |
722 | static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id) | |
723 | { | |
724 | return ti_sci_set_device_state(handle, id, | |
725 | 0, MSG_DEVICE_SW_STATE_AUTO_OFF); | |
726 | } | |
727 | ||
728 | /** | |
729 | * ti_sci_cmd_dev_is_valid() - Is the device valid | |
730 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
731 | * @id: Device Identifier | |
732 | * | |
733 | * Return: 0 if all went fine and the device ID is valid, else return | |
734 | * appropriate error. | |
735 | */ | |
736 | static int ti_sci_cmd_dev_is_valid(const struct ti_sci_handle *handle, u32 id) | |
737 | { | |
738 | u8 unused; | |
739 | ||
740 | /* check the device state which will also tell us if the ID is valid */ | |
741 | return ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &unused); | |
742 | } | |
743 | ||
744 | /** | |
745 | * ti_sci_cmd_dev_get_clcnt() - Get context loss counter | |
746 | * @handle: Pointer to TISCI handle | |
747 | * @id: Device Identifier | |
748 | * @count: Pointer to Context Loss counter to populate | |
749 | * | |
750 | * Return: 0 if all went fine, else return appropriate error. | |
751 | */ | |
752 | static int ti_sci_cmd_dev_get_clcnt(const struct ti_sci_handle *handle, u32 id, | |
753 | u32 *count) | |
754 | { | |
755 | return ti_sci_get_device_state(handle, id, count, NULL, NULL, NULL); | |
756 | } | |
757 | ||
758 | /** | |
759 | * ti_sci_cmd_dev_is_idle() - Check if the device is requested to be idle | |
760 | * @handle: Pointer to TISCI handle | |
761 | * @id: Device Identifier | |
762 | * @r_state: true if requested to be idle | |
763 | * | |
764 | * Return: 0 if all went fine, else return appropriate error. | |
765 | */ | |
766 | static int ti_sci_cmd_dev_is_idle(const struct ti_sci_handle *handle, u32 id, | |
767 | bool *r_state) | |
768 | { | |
769 | int ret; | |
770 | u8 state; | |
771 | ||
772 | if (!r_state) | |
773 | return -EINVAL; | |
774 | ||
775 | ret = ti_sci_get_device_state(handle, id, NULL, NULL, &state, NULL); | |
776 | if (ret) | |
777 | return ret; | |
778 | ||
779 | *r_state = (state == MSG_DEVICE_SW_STATE_RETENTION); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | /** | |
785 | * ti_sci_cmd_dev_is_stop() - Check if the device is requested to be stopped | |
786 | * @handle: Pointer to TISCI handle | |
787 | * @id: Device Identifier | |
788 | * @r_state: true if requested to be stopped | |
789 | * @curr_state: true if currently stopped. | |
790 | * | |
791 | * Return: 0 if all went fine, else return appropriate error. | |
792 | */ | |
793 | static int ti_sci_cmd_dev_is_stop(const struct ti_sci_handle *handle, u32 id, | |
794 | bool *r_state, bool *curr_state) | |
795 | { | |
796 | int ret; | |
797 | u8 p_state, c_state; | |
798 | ||
799 | if (!r_state && !curr_state) | |
800 | return -EINVAL; | |
801 | ||
802 | ret = | |
803 | ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); | |
804 | if (ret) | |
805 | return ret; | |
806 | ||
807 | if (r_state) | |
808 | *r_state = (p_state == MSG_DEVICE_SW_STATE_AUTO_OFF); | |
809 | if (curr_state) | |
810 | *curr_state = (c_state == MSG_DEVICE_HW_STATE_OFF); | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | /** | |
816 | * ti_sci_cmd_dev_is_on() - Check if the device is requested to be ON | |
817 | * @handle: Pointer to TISCI handle | |
818 | * @id: Device Identifier | |
819 | * @r_state: true if requested to be ON | |
820 | * @curr_state: true if currently ON and active | |
821 | * | |
822 | * Return: 0 if all went fine, else return appropriate error. | |
823 | */ | |
824 | static int ti_sci_cmd_dev_is_on(const struct ti_sci_handle *handle, u32 id, | |
825 | bool *r_state, bool *curr_state) | |
826 | { | |
827 | int ret; | |
828 | u8 p_state, c_state; | |
829 | ||
830 | if (!r_state && !curr_state) | |
831 | return -EINVAL; | |
832 | ||
833 | ret = | |
834 | ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); | |
835 | if (ret) | |
836 | return ret; | |
837 | ||
838 | if (r_state) | |
839 | *r_state = (p_state == MSG_DEVICE_SW_STATE_ON); | |
840 | if (curr_state) | |
841 | *curr_state = (c_state == MSG_DEVICE_HW_STATE_ON); | |
842 | ||
843 | return 0; | |
844 | } | |
845 | ||
846 | /** | |
847 | * ti_sci_cmd_dev_is_trans() - Check if the device is currently transitioning | |
848 | * @handle: Pointer to TISCI handle | |
849 | * @id: Device Identifier | |
850 | * @curr_state: true if currently transitioning. | |
851 | * | |
852 | * Return: 0 if all went fine, else return appropriate error. | |
853 | */ | |
854 | static int ti_sci_cmd_dev_is_trans(const struct ti_sci_handle *handle, u32 id, | |
855 | bool *curr_state) | |
856 | { | |
857 | int ret; | |
858 | u8 state; | |
859 | ||
860 | if (!curr_state) | |
861 | return -EINVAL; | |
862 | ||
863 | ret = ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &state); | |
864 | if (ret) | |
865 | return ret; | |
866 | ||
867 | *curr_state = (state == MSG_DEVICE_HW_STATE_TRANS); | |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | /** | |
873 | * ti_sci_cmd_set_device_resets() - command to set resets for device managed | |
874 | * by TISCI | |
875 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
876 | * @id: Device Identifier | |
877 | * @reset_state: Device specific reset bit field | |
878 | * | |
879 | * Return: 0 if all went fine, else return appropriate error. | |
880 | */ | |
881 | static int ti_sci_cmd_set_device_resets(const struct ti_sci_handle *handle, | |
882 | u32 id, u32 reset_state) | |
883 | { | |
884 | struct ti_sci_info *info; | |
885 | struct ti_sci_msg_req_set_device_resets *req; | |
886 | struct ti_sci_msg_hdr *resp; | |
887 | struct ti_sci_xfer *xfer; | |
888 | struct device *dev; | |
889 | int ret = 0; | |
890 | ||
891 | if (IS_ERR(handle)) | |
892 | return PTR_ERR(handle); | |
893 | if (!handle) | |
894 | return -EINVAL; | |
895 | ||
896 | info = handle_to_ti_sci_info(handle); | |
897 | dev = info->dev; | |
898 | ||
899 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_DEVICE_RESETS, | |
900 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
901 | sizeof(*req), sizeof(*resp)); | |
902 | if (IS_ERR(xfer)) { | |
903 | ret = PTR_ERR(xfer); | |
904 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
905 | return ret; | |
906 | } | |
907 | req = (struct ti_sci_msg_req_set_device_resets *)xfer->xfer_buf; | |
908 | req->id = id; | |
909 | req->resets = reset_state; | |
910 | ||
911 | ret = ti_sci_do_xfer(info, xfer); | |
912 | if (ret) { | |
913 | dev_err(dev, "Mbox send fail %d\n", ret); | |
914 | goto fail; | |
915 | } | |
916 | ||
917 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
918 | ||
919 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
920 | ||
921 | fail: | |
922 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
923 | ||
924 | return ret; | |
925 | } | |
926 | ||
927 | /** | |
928 | * ti_sci_cmd_get_device_resets() - Get reset state for device managed | |
929 | * by TISCI | |
930 | * @handle: Pointer to TISCI handle | |
931 | * @id: Device Identifier | |
932 | * @reset_state: Pointer to reset state to populate | |
933 | * | |
934 | * Return: 0 if all went fine, else return appropriate error. | |
935 | */ | |
936 | static int ti_sci_cmd_get_device_resets(const struct ti_sci_handle *handle, | |
937 | u32 id, u32 *reset_state) | |
938 | { | |
939 | return ti_sci_get_device_state(handle, id, NULL, reset_state, NULL, | |
940 | NULL); | |
941 | } | |
942 | ||
9f723220 NM |
943 | /** |
944 | * ti_sci_set_clock_state() - Set clock state helper | |
945 | * @handle: pointer to TI SCI handle | |
946 | * @dev_id: Device identifier this request is for | |
947 | * @clk_id: Clock identifier for the device for this request. | |
948 | * Each device has it's own set of clock inputs. This indexes | |
949 | * which clock input to modify. | |
950 | * @flags: Header flags as needed | |
951 | * @state: State to request for the clock. | |
952 | * | |
953 | * Return: 0 if all went well, else returns appropriate error value. | |
954 | */ | |
955 | static int ti_sci_set_clock_state(const struct ti_sci_handle *handle, | |
81f4458c | 956 | u32 dev_id, u32 clk_id, |
9f723220 NM |
957 | u32 flags, u8 state) |
958 | { | |
959 | struct ti_sci_info *info; | |
960 | struct ti_sci_msg_req_set_clock_state *req; | |
961 | struct ti_sci_msg_hdr *resp; | |
962 | struct ti_sci_xfer *xfer; | |
963 | struct device *dev; | |
964 | int ret = 0; | |
965 | ||
966 | if (IS_ERR(handle)) | |
967 | return PTR_ERR(handle); | |
968 | if (!handle) | |
969 | return -EINVAL; | |
970 | ||
971 | info = handle_to_ti_sci_info(handle); | |
972 | dev = info->dev; | |
973 | ||
974 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_STATE, | |
975 | flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
976 | sizeof(*req), sizeof(*resp)); | |
977 | if (IS_ERR(xfer)) { | |
978 | ret = PTR_ERR(xfer); | |
979 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
980 | return ret; | |
981 | } | |
982 | req = (struct ti_sci_msg_req_set_clock_state *)xfer->xfer_buf; | |
983 | req->dev_id = dev_id; | |
81f4458c TK |
984 | if (clk_id < 255) { |
985 | req->clk_id = clk_id; | |
986 | } else { | |
987 | req->clk_id = 255; | |
988 | req->clk_id_32 = clk_id; | |
989 | } | |
9f723220 NM |
990 | req->request_state = state; |
991 | ||
992 | ret = ti_sci_do_xfer(info, xfer); | |
993 | if (ret) { | |
994 | dev_err(dev, "Mbox send fail %d\n", ret); | |
995 | goto fail; | |
996 | } | |
997 | ||
998 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
999 | ||
1000 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1001 | ||
1002 | fail: | |
1003 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1004 | ||
1005 | return ret; | |
1006 | } | |
1007 | ||
1008 | /** | |
1009 | * ti_sci_cmd_get_clock_state() - Get clock state helper | |
1010 | * @handle: pointer to TI SCI handle | |
1011 | * @dev_id: Device identifier this request is for | |
1012 | * @clk_id: Clock identifier for the device for this request. | |
1013 | * Each device has it's own set of clock inputs. This indexes | |
1014 | * which clock input to modify. | |
1015 | * @programmed_state: State requested for clock to move to | |
1016 | * @current_state: State that the clock is currently in | |
1017 | * | |
1018 | * Return: 0 if all went well, else returns appropriate error value. | |
1019 | */ | |
1020 | static int ti_sci_cmd_get_clock_state(const struct ti_sci_handle *handle, | |
81f4458c | 1021 | u32 dev_id, u32 clk_id, |
9f723220 NM |
1022 | u8 *programmed_state, u8 *current_state) |
1023 | { | |
1024 | struct ti_sci_info *info; | |
1025 | struct ti_sci_msg_req_get_clock_state *req; | |
1026 | struct ti_sci_msg_resp_get_clock_state *resp; | |
1027 | struct ti_sci_xfer *xfer; | |
1028 | struct device *dev; | |
1029 | int ret = 0; | |
1030 | ||
1031 | if (IS_ERR(handle)) | |
1032 | return PTR_ERR(handle); | |
1033 | if (!handle) | |
1034 | return -EINVAL; | |
1035 | ||
1036 | if (!programmed_state && !current_state) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | info = handle_to_ti_sci_info(handle); | |
1040 | dev = info->dev; | |
1041 | ||
1042 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_STATE, | |
1043 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1044 | sizeof(*req), sizeof(*resp)); | |
1045 | if (IS_ERR(xfer)) { | |
1046 | ret = PTR_ERR(xfer); | |
1047 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1048 | return ret; | |
1049 | } | |
1050 | req = (struct ti_sci_msg_req_get_clock_state *)xfer->xfer_buf; | |
1051 | req->dev_id = dev_id; | |
81f4458c TK |
1052 | if (clk_id < 255) { |
1053 | req->clk_id = clk_id; | |
1054 | } else { | |
1055 | req->clk_id = 255; | |
1056 | req->clk_id_32 = clk_id; | |
1057 | } | |
9f723220 NM |
1058 | |
1059 | ret = ti_sci_do_xfer(info, xfer); | |
1060 | if (ret) { | |
1061 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1062 | goto fail; | |
1063 | } | |
1064 | ||
1065 | resp = (struct ti_sci_msg_resp_get_clock_state *)xfer->xfer_buf; | |
1066 | ||
1067 | if (!ti_sci_is_response_ack(resp)) { | |
1068 | ret = -ENODEV; | |
1069 | goto fail; | |
1070 | } | |
1071 | ||
1072 | if (programmed_state) | |
1073 | *programmed_state = resp->programmed_state; | |
1074 | if (current_state) | |
1075 | *current_state = resp->current_state; | |
1076 | ||
1077 | fail: | |
1078 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1079 | ||
1080 | return ret; | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * ti_sci_cmd_get_clock() - Get control of a clock from TI SCI | |
1085 | * @handle: pointer to TI SCI handle | |
1086 | * @dev_id: Device identifier this request is for | |
1087 | * @clk_id: Clock identifier for the device for this request. | |
1088 | * Each device has it's own set of clock inputs. This indexes | |
1089 | * which clock input to modify. | |
1090 | * @needs_ssc: 'true' if Spread Spectrum clock is desired, else 'false' | |
1091 | * @can_change_freq: 'true' if frequency change is desired, else 'false' | |
1092 | * @enable_input_term: 'true' if input termination is desired, else 'false' | |
1093 | * | |
1094 | * Return: 0 if all went well, else returns appropriate error value. | |
1095 | */ | |
1096 | static int ti_sci_cmd_get_clock(const struct ti_sci_handle *handle, u32 dev_id, | |
81f4458c TK |
1097 | u32 clk_id, bool needs_ssc, |
1098 | bool can_change_freq, bool enable_input_term) | |
9f723220 NM |
1099 | { |
1100 | u32 flags = 0; | |
1101 | ||
1102 | flags |= needs_ssc ? MSG_FLAG_CLOCK_ALLOW_SSC : 0; | |
1103 | flags |= can_change_freq ? MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE : 0; | |
1104 | flags |= enable_input_term ? MSG_FLAG_CLOCK_INPUT_TERM : 0; | |
1105 | ||
1106 | return ti_sci_set_clock_state(handle, dev_id, clk_id, flags, | |
1107 | MSG_CLOCK_SW_STATE_REQ); | |
1108 | } | |
1109 | ||
1110 | /** | |
1111 | * ti_sci_cmd_idle_clock() - Idle a clock which is in our control | |
1112 | * @handle: pointer to TI SCI handle | |
1113 | * @dev_id: Device identifier this request is for | |
1114 | * @clk_id: Clock identifier for the device for this request. | |
1115 | * Each device has it's own set of clock inputs. This indexes | |
1116 | * which clock input to modify. | |
1117 | * | |
1118 | * NOTE: This clock must have been requested by get_clock previously. | |
1119 | * | |
1120 | * Return: 0 if all went well, else returns appropriate error value. | |
1121 | */ | |
1122 | static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle, | |
81f4458c | 1123 | u32 dev_id, u32 clk_id) |
9f723220 | 1124 | { |
71b61082 TK |
1125 | return ti_sci_set_clock_state(handle, dev_id, clk_id, |
1126 | MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, | |
9f723220 NM |
1127 | MSG_CLOCK_SW_STATE_UNREQ); |
1128 | } | |
1129 | ||
1130 | /** | |
1131 | * ti_sci_cmd_put_clock() - Release a clock from our control back to TISCI | |
1132 | * @handle: pointer to TI SCI handle | |
1133 | * @dev_id: Device identifier this request is for | |
1134 | * @clk_id: Clock identifier for the device for this request. | |
1135 | * Each device has it's own set of clock inputs. This indexes | |
1136 | * which clock input to modify. | |
1137 | * | |
1138 | * NOTE: This clock must have been requested by get_clock previously. | |
1139 | * | |
1140 | * Return: 0 if all went well, else returns appropriate error value. | |
1141 | */ | |
1142 | static int ti_sci_cmd_put_clock(const struct ti_sci_handle *handle, | |
81f4458c | 1143 | u32 dev_id, u32 clk_id) |
9f723220 | 1144 | { |
71b61082 TK |
1145 | return ti_sci_set_clock_state(handle, dev_id, clk_id, |
1146 | MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, | |
9f723220 NM |
1147 | MSG_CLOCK_SW_STATE_AUTO); |
1148 | } | |
1149 | ||
1150 | /** | |
1151 | * ti_sci_cmd_clk_is_auto() - Is the clock being auto managed | |
1152 | * @handle: pointer to TI SCI handle | |
1153 | * @dev_id: Device identifier this request is for | |
1154 | * @clk_id: Clock identifier for the device for this request. | |
1155 | * Each device has it's own set of clock inputs. This indexes | |
1156 | * which clock input to modify. | |
1157 | * @req_state: state indicating if the clock is auto managed | |
1158 | * | |
1159 | * Return: 0 if all went well, else returns appropriate error value. | |
1160 | */ | |
1161 | static int ti_sci_cmd_clk_is_auto(const struct ti_sci_handle *handle, | |
81f4458c | 1162 | u32 dev_id, u32 clk_id, bool *req_state) |
9f723220 NM |
1163 | { |
1164 | u8 state = 0; | |
1165 | int ret; | |
1166 | ||
1167 | if (!req_state) | |
1168 | return -EINVAL; | |
1169 | ||
1170 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, &state, NULL); | |
1171 | if (ret) | |
1172 | return ret; | |
1173 | ||
1174 | *req_state = (state == MSG_CLOCK_SW_STATE_AUTO); | |
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * ti_sci_cmd_clk_is_on() - Is the clock ON | |
1180 | * @handle: pointer to TI SCI handle | |
1181 | * @dev_id: Device identifier this request is for | |
1182 | * @clk_id: Clock identifier for the device for this request. | |
1183 | * Each device has it's own set of clock inputs. This indexes | |
1184 | * which clock input to modify. | |
1185 | * @req_state: state indicating if the clock is managed by us and enabled | |
1186 | * @curr_state: state indicating if the clock is ready for operation | |
1187 | * | |
1188 | * Return: 0 if all went well, else returns appropriate error value. | |
1189 | */ | |
1190 | static int ti_sci_cmd_clk_is_on(const struct ti_sci_handle *handle, u32 dev_id, | |
81f4458c | 1191 | u32 clk_id, bool *req_state, bool *curr_state) |
9f723220 NM |
1192 | { |
1193 | u8 c_state = 0, r_state = 0; | |
1194 | int ret; | |
1195 | ||
1196 | if (!req_state && !curr_state) | |
1197 | return -EINVAL; | |
1198 | ||
1199 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, | |
1200 | &r_state, &c_state); | |
1201 | if (ret) | |
1202 | return ret; | |
1203 | ||
1204 | if (req_state) | |
1205 | *req_state = (r_state == MSG_CLOCK_SW_STATE_REQ); | |
1206 | if (curr_state) | |
1207 | *curr_state = (c_state == MSG_CLOCK_HW_STATE_READY); | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | /** | |
1212 | * ti_sci_cmd_clk_is_off() - Is the clock OFF | |
1213 | * @handle: pointer to TI SCI handle | |
1214 | * @dev_id: Device identifier this request is for | |
1215 | * @clk_id: Clock identifier for the device for this request. | |
1216 | * Each device has it's own set of clock inputs. This indexes | |
1217 | * which clock input to modify. | |
1218 | * @req_state: state indicating if the clock is managed by us and disabled | |
1219 | * @curr_state: state indicating if the clock is NOT ready for operation | |
1220 | * | |
1221 | * Return: 0 if all went well, else returns appropriate error value. | |
1222 | */ | |
1223 | static int ti_sci_cmd_clk_is_off(const struct ti_sci_handle *handle, u32 dev_id, | |
81f4458c | 1224 | u32 clk_id, bool *req_state, bool *curr_state) |
9f723220 NM |
1225 | { |
1226 | u8 c_state = 0, r_state = 0; | |
1227 | int ret; | |
1228 | ||
1229 | if (!req_state && !curr_state) | |
1230 | return -EINVAL; | |
1231 | ||
1232 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, | |
1233 | &r_state, &c_state); | |
1234 | if (ret) | |
1235 | return ret; | |
1236 | ||
1237 | if (req_state) | |
1238 | *req_state = (r_state == MSG_CLOCK_SW_STATE_UNREQ); | |
1239 | if (curr_state) | |
1240 | *curr_state = (c_state == MSG_CLOCK_HW_STATE_NOT_READY); | |
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * ti_sci_cmd_clk_set_parent() - Set the clock source of a specific device clock | |
1246 | * @handle: pointer to TI SCI handle | |
1247 | * @dev_id: Device identifier this request is for | |
1248 | * @clk_id: Clock identifier for the device for this request. | |
1249 | * Each device has it's own set of clock inputs. This indexes | |
1250 | * which clock input to modify. | |
1251 | * @parent_id: Parent clock identifier to set | |
1252 | * | |
1253 | * Return: 0 if all went well, else returns appropriate error value. | |
1254 | */ | |
1255 | static int ti_sci_cmd_clk_set_parent(const struct ti_sci_handle *handle, | |
81f4458c | 1256 | u32 dev_id, u32 clk_id, u32 parent_id) |
9f723220 NM |
1257 | { |
1258 | struct ti_sci_info *info; | |
1259 | struct ti_sci_msg_req_set_clock_parent *req; | |
1260 | struct ti_sci_msg_hdr *resp; | |
1261 | struct ti_sci_xfer *xfer; | |
1262 | struct device *dev; | |
1263 | int ret = 0; | |
1264 | ||
1265 | if (IS_ERR(handle)) | |
1266 | return PTR_ERR(handle); | |
1267 | if (!handle) | |
1268 | return -EINVAL; | |
1269 | ||
1270 | info = handle_to_ti_sci_info(handle); | |
1271 | dev = info->dev; | |
1272 | ||
1273 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_PARENT, | |
1274 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1275 | sizeof(*req), sizeof(*resp)); | |
1276 | if (IS_ERR(xfer)) { | |
1277 | ret = PTR_ERR(xfer); | |
1278 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1279 | return ret; | |
1280 | } | |
1281 | req = (struct ti_sci_msg_req_set_clock_parent *)xfer->xfer_buf; | |
1282 | req->dev_id = dev_id; | |
81f4458c TK |
1283 | if (clk_id < 255) { |
1284 | req->clk_id = clk_id; | |
1285 | } else { | |
1286 | req->clk_id = 255; | |
1287 | req->clk_id_32 = clk_id; | |
1288 | } | |
1289 | if (parent_id < 255) { | |
1290 | req->parent_id = parent_id; | |
1291 | } else { | |
1292 | req->parent_id = 255; | |
1293 | req->parent_id_32 = parent_id; | |
1294 | } | |
9f723220 NM |
1295 | |
1296 | ret = ti_sci_do_xfer(info, xfer); | |
1297 | if (ret) { | |
1298 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1299 | goto fail; | |
1300 | } | |
1301 | ||
1302 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1303 | ||
1304 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1305 | ||
1306 | fail: | |
1307 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1308 | ||
1309 | return ret; | |
1310 | } | |
1311 | ||
1312 | /** | |
1313 | * ti_sci_cmd_clk_get_parent() - Get current parent clock source | |
1314 | * @handle: pointer to TI SCI handle | |
1315 | * @dev_id: Device identifier this request is for | |
1316 | * @clk_id: Clock identifier for the device for this request. | |
1317 | * Each device has it's own set of clock inputs. This indexes | |
1318 | * which clock input to modify. | |
1319 | * @parent_id: Current clock parent | |
1320 | * | |
1321 | * Return: 0 if all went well, else returns appropriate error value. | |
1322 | */ | |
1323 | static int ti_sci_cmd_clk_get_parent(const struct ti_sci_handle *handle, | |
81f4458c | 1324 | u32 dev_id, u32 clk_id, u32 *parent_id) |
9f723220 NM |
1325 | { |
1326 | struct ti_sci_info *info; | |
1327 | struct ti_sci_msg_req_get_clock_parent *req; | |
1328 | struct ti_sci_msg_resp_get_clock_parent *resp; | |
1329 | struct ti_sci_xfer *xfer; | |
1330 | struct device *dev; | |
1331 | int ret = 0; | |
1332 | ||
1333 | if (IS_ERR(handle)) | |
1334 | return PTR_ERR(handle); | |
1335 | if (!handle || !parent_id) | |
1336 | return -EINVAL; | |
1337 | ||
1338 | info = handle_to_ti_sci_info(handle); | |
1339 | dev = info->dev; | |
1340 | ||
1341 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_PARENT, | |
1342 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1343 | sizeof(*req), sizeof(*resp)); | |
1344 | if (IS_ERR(xfer)) { | |
1345 | ret = PTR_ERR(xfer); | |
1346 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1347 | return ret; | |
1348 | } | |
1349 | req = (struct ti_sci_msg_req_get_clock_parent *)xfer->xfer_buf; | |
1350 | req->dev_id = dev_id; | |
81f4458c TK |
1351 | if (clk_id < 255) { |
1352 | req->clk_id = clk_id; | |
1353 | } else { | |
1354 | req->clk_id = 255; | |
1355 | req->clk_id_32 = clk_id; | |
1356 | } | |
9f723220 NM |
1357 | |
1358 | ret = ti_sci_do_xfer(info, xfer); | |
1359 | if (ret) { | |
1360 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1361 | goto fail; | |
1362 | } | |
1363 | ||
1364 | resp = (struct ti_sci_msg_resp_get_clock_parent *)xfer->xfer_buf; | |
1365 | ||
81f4458c | 1366 | if (!ti_sci_is_response_ack(resp)) { |
9f723220 | 1367 | ret = -ENODEV; |
81f4458c TK |
1368 | } else { |
1369 | if (resp->parent_id < 255) | |
1370 | *parent_id = resp->parent_id; | |
1371 | else | |
1372 | *parent_id = resp->parent_id_32; | |
1373 | } | |
9f723220 NM |
1374 | |
1375 | fail: | |
1376 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1377 | ||
1378 | return ret; | |
1379 | } | |
1380 | ||
1381 | /** | |
1382 | * ti_sci_cmd_clk_get_num_parents() - Get num parents of the current clk source | |
1383 | * @handle: pointer to TI SCI handle | |
1384 | * @dev_id: Device identifier this request is for | |
1385 | * @clk_id: Clock identifier for the device for this request. | |
1386 | * Each device has it's own set of clock inputs. This indexes | |
1387 | * which clock input to modify. | |
1388 | * @num_parents: Returns he number of parents to the current clock. | |
1389 | * | |
1390 | * Return: 0 if all went well, else returns appropriate error value. | |
1391 | */ | |
1392 | static int ti_sci_cmd_clk_get_num_parents(const struct ti_sci_handle *handle, | |
81f4458c TK |
1393 | u32 dev_id, u32 clk_id, |
1394 | u32 *num_parents) | |
9f723220 NM |
1395 | { |
1396 | struct ti_sci_info *info; | |
1397 | struct ti_sci_msg_req_get_clock_num_parents *req; | |
1398 | struct ti_sci_msg_resp_get_clock_num_parents *resp; | |
1399 | struct ti_sci_xfer *xfer; | |
1400 | struct device *dev; | |
1401 | int ret = 0; | |
1402 | ||
1403 | if (IS_ERR(handle)) | |
1404 | return PTR_ERR(handle); | |
1405 | if (!handle || !num_parents) | |
1406 | return -EINVAL; | |
1407 | ||
1408 | info = handle_to_ti_sci_info(handle); | |
1409 | dev = info->dev; | |
1410 | ||
1411 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_NUM_CLOCK_PARENTS, | |
1412 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1413 | sizeof(*req), sizeof(*resp)); | |
1414 | if (IS_ERR(xfer)) { | |
1415 | ret = PTR_ERR(xfer); | |
1416 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1417 | return ret; | |
1418 | } | |
1419 | req = (struct ti_sci_msg_req_get_clock_num_parents *)xfer->xfer_buf; | |
1420 | req->dev_id = dev_id; | |
81f4458c TK |
1421 | if (clk_id < 255) { |
1422 | req->clk_id = clk_id; | |
1423 | } else { | |
1424 | req->clk_id = 255; | |
1425 | req->clk_id_32 = clk_id; | |
1426 | } | |
9f723220 NM |
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_get_clock_num_parents *)xfer->xfer_buf; | |
1435 | ||
81f4458c | 1436 | if (!ti_sci_is_response_ack(resp)) { |
9f723220 | 1437 | ret = -ENODEV; |
81f4458c TK |
1438 | } else { |
1439 | if (resp->num_parents < 255) | |
1440 | *num_parents = resp->num_parents; | |
1441 | else | |
1442 | *num_parents = resp->num_parents_32; | |
1443 | } | |
9f723220 NM |
1444 | |
1445 | fail: | |
1446 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1447 | ||
1448 | return ret; | |
1449 | } | |
1450 | ||
1451 | /** | |
1452 | * ti_sci_cmd_clk_get_match_freq() - Find a good match for frequency | |
1453 | * @handle: pointer to TI SCI handle | |
1454 | * @dev_id: Device identifier this request is for | |
1455 | * @clk_id: Clock identifier for the device for this request. | |
1456 | * Each device has it's own set of clock inputs. This indexes | |
1457 | * which clock input to modify. | |
1458 | * @min_freq: The minimum allowable frequency in Hz. This is the minimum | |
1459 | * allowable programmed frequency and does not account for clock | |
1460 | * tolerances and jitter. | |
1461 | * @target_freq: The target clock frequency in Hz. A frequency will be | |
1462 | * processed as close to this target frequency as possible. | |
1463 | * @max_freq: The maximum allowable frequency in Hz. This is the maximum | |
1464 | * allowable programmed frequency and does not account for clock | |
1465 | * tolerances and jitter. | |
1466 | * @match_freq: Frequency match in Hz response. | |
1467 | * | |
1468 | * Return: 0 if all went well, else returns appropriate error value. | |
1469 | */ | |
1470 | static int ti_sci_cmd_clk_get_match_freq(const struct ti_sci_handle *handle, | |
81f4458c | 1471 | u32 dev_id, u32 clk_id, u64 min_freq, |
9f723220 NM |
1472 | u64 target_freq, u64 max_freq, |
1473 | u64 *match_freq) | |
1474 | { | |
1475 | struct ti_sci_info *info; | |
1476 | struct ti_sci_msg_req_query_clock_freq *req; | |
1477 | struct ti_sci_msg_resp_query_clock_freq *resp; | |
1478 | struct ti_sci_xfer *xfer; | |
1479 | struct device *dev; | |
1480 | int ret = 0; | |
1481 | ||
1482 | if (IS_ERR(handle)) | |
1483 | return PTR_ERR(handle); | |
1484 | if (!handle || !match_freq) | |
1485 | return -EINVAL; | |
1486 | ||
1487 | info = handle_to_ti_sci_info(handle); | |
1488 | dev = info->dev; | |
1489 | ||
1490 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_QUERY_CLOCK_FREQ, | |
1491 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1492 | sizeof(*req), sizeof(*resp)); | |
1493 | if (IS_ERR(xfer)) { | |
1494 | ret = PTR_ERR(xfer); | |
1495 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1496 | return ret; | |
1497 | } | |
1498 | req = (struct ti_sci_msg_req_query_clock_freq *)xfer->xfer_buf; | |
1499 | req->dev_id = dev_id; | |
81f4458c TK |
1500 | if (clk_id < 255) { |
1501 | req->clk_id = clk_id; | |
1502 | } else { | |
1503 | req->clk_id = 255; | |
1504 | req->clk_id_32 = clk_id; | |
1505 | } | |
9f723220 NM |
1506 | req->min_freq_hz = min_freq; |
1507 | req->target_freq_hz = target_freq; | |
1508 | req->max_freq_hz = max_freq; | |
1509 | ||
1510 | ret = ti_sci_do_xfer(info, xfer); | |
1511 | if (ret) { | |
1512 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1513 | goto fail; | |
1514 | } | |
1515 | ||
1516 | resp = (struct ti_sci_msg_resp_query_clock_freq *)xfer->xfer_buf; | |
1517 | ||
1518 | if (!ti_sci_is_response_ack(resp)) | |
1519 | ret = -ENODEV; | |
1520 | else | |
1521 | *match_freq = resp->freq_hz; | |
1522 | ||
1523 | fail: | |
1524 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1525 | ||
1526 | return ret; | |
1527 | } | |
1528 | ||
1529 | /** | |
1530 | * ti_sci_cmd_clk_set_freq() - Set a frequency for clock | |
1531 | * @handle: pointer to TI SCI handle | |
1532 | * @dev_id: Device identifier this request is for | |
1533 | * @clk_id: Clock identifier for the device for this request. | |
1534 | * Each device has it's own set of clock inputs. This indexes | |
1535 | * which clock input to modify. | |
1536 | * @min_freq: The minimum allowable frequency in Hz. This is the minimum | |
1537 | * allowable programmed frequency and does not account for clock | |
1538 | * tolerances and jitter. | |
1539 | * @target_freq: The target clock frequency in Hz. A frequency will be | |
1540 | * processed as close to this target frequency as possible. | |
1541 | * @max_freq: The maximum allowable frequency in Hz. This is the maximum | |
1542 | * allowable programmed frequency and does not account for clock | |
1543 | * tolerances and jitter. | |
1544 | * | |
1545 | * Return: 0 if all went well, else returns appropriate error value. | |
1546 | */ | |
1547 | static int ti_sci_cmd_clk_set_freq(const struct ti_sci_handle *handle, | |
81f4458c | 1548 | u32 dev_id, u32 clk_id, u64 min_freq, |
9f723220 NM |
1549 | u64 target_freq, u64 max_freq) |
1550 | { | |
1551 | struct ti_sci_info *info; | |
1552 | struct ti_sci_msg_req_set_clock_freq *req; | |
1553 | struct ti_sci_msg_hdr *resp; | |
1554 | struct ti_sci_xfer *xfer; | |
1555 | struct device *dev; | |
1556 | int ret = 0; | |
1557 | ||
1558 | if (IS_ERR(handle)) | |
1559 | return PTR_ERR(handle); | |
1560 | if (!handle) | |
1561 | return -EINVAL; | |
1562 | ||
1563 | info = handle_to_ti_sci_info(handle); | |
1564 | dev = info->dev; | |
1565 | ||
1566 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_FREQ, | |
1567 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1568 | sizeof(*req), sizeof(*resp)); | |
1569 | if (IS_ERR(xfer)) { | |
1570 | ret = PTR_ERR(xfer); | |
1571 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1572 | return ret; | |
1573 | } | |
1574 | req = (struct ti_sci_msg_req_set_clock_freq *)xfer->xfer_buf; | |
1575 | req->dev_id = dev_id; | |
81f4458c TK |
1576 | if (clk_id < 255) { |
1577 | req->clk_id = clk_id; | |
1578 | } else { | |
1579 | req->clk_id = 255; | |
1580 | req->clk_id_32 = clk_id; | |
1581 | } | |
9f723220 NM |
1582 | req->min_freq_hz = min_freq; |
1583 | req->target_freq_hz = target_freq; | |
1584 | req->max_freq_hz = max_freq; | |
1585 | ||
1586 | ret = ti_sci_do_xfer(info, xfer); | |
1587 | if (ret) { | |
1588 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1589 | goto fail; | |
1590 | } | |
1591 | ||
1592 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1593 | ||
1594 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1595 | ||
1596 | fail: | |
1597 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1598 | ||
1599 | return ret; | |
1600 | } | |
1601 | ||
1602 | /** | |
1603 | * ti_sci_cmd_clk_get_freq() - Get current frequency | |
1604 | * @handle: pointer to TI SCI handle | |
1605 | * @dev_id: Device identifier this request is for | |
1606 | * @clk_id: Clock identifier for the device for this request. | |
1607 | * Each device has it's own set of clock inputs. This indexes | |
1608 | * which clock input to modify. | |
1609 | * @freq: Currently frequency in Hz | |
1610 | * | |
1611 | * Return: 0 if all went well, else returns appropriate error value. | |
1612 | */ | |
1613 | static int ti_sci_cmd_clk_get_freq(const struct ti_sci_handle *handle, | |
81f4458c | 1614 | u32 dev_id, u32 clk_id, u64 *freq) |
9f723220 NM |
1615 | { |
1616 | struct ti_sci_info *info; | |
1617 | struct ti_sci_msg_req_get_clock_freq *req; | |
1618 | struct ti_sci_msg_resp_get_clock_freq *resp; | |
1619 | struct ti_sci_xfer *xfer; | |
1620 | struct device *dev; | |
1621 | int ret = 0; | |
1622 | ||
1623 | if (IS_ERR(handle)) | |
1624 | return PTR_ERR(handle); | |
1625 | if (!handle || !freq) | |
1626 | return -EINVAL; | |
1627 | ||
1628 | info = handle_to_ti_sci_info(handle); | |
1629 | dev = info->dev; | |
1630 | ||
1631 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_FREQ, | |
1632 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1633 | sizeof(*req), sizeof(*resp)); | |
1634 | if (IS_ERR(xfer)) { | |
1635 | ret = PTR_ERR(xfer); | |
1636 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1637 | return ret; | |
1638 | } | |
1639 | req = (struct ti_sci_msg_req_get_clock_freq *)xfer->xfer_buf; | |
1640 | req->dev_id = dev_id; | |
81f4458c TK |
1641 | if (clk_id < 255) { |
1642 | req->clk_id = clk_id; | |
1643 | } else { | |
1644 | req->clk_id = 255; | |
1645 | req->clk_id_32 = clk_id; | |
1646 | } | |
9f723220 NM |
1647 | |
1648 | ret = ti_sci_do_xfer(info, xfer); | |
1649 | if (ret) { | |
1650 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1651 | goto fail; | |
1652 | } | |
1653 | ||
1654 | resp = (struct ti_sci_msg_resp_get_clock_freq *)xfer->xfer_buf; | |
1655 | ||
1656 | if (!ti_sci_is_response_ack(resp)) | |
1657 | ret = -ENODEV; | |
1658 | else | |
1659 | *freq = resp->freq_hz; | |
1660 | ||
1661 | fail: | |
1662 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1663 | ||
1664 | return ret; | |
1665 | } | |
1666 | ||
912cffb4 NM |
1667 | static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle) |
1668 | { | |
1669 | struct ti_sci_info *info; | |
1670 | struct ti_sci_msg_req_reboot *req; | |
1671 | struct ti_sci_msg_hdr *resp; | |
1672 | struct ti_sci_xfer *xfer; | |
1673 | struct device *dev; | |
1674 | int ret = 0; | |
1675 | ||
1676 | if (IS_ERR(handle)) | |
1677 | return PTR_ERR(handle); | |
1678 | if (!handle) | |
1679 | return -EINVAL; | |
1680 | ||
1681 | info = handle_to_ti_sci_info(handle); | |
1682 | dev = info->dev; | |
1683 | ||
1684 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SYS_RESET, | |
1685 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1686 | sizeof(*req), sizeof(*resp)); | |
1687 | if (IS_ERR(xfer)) { | |
1688 | ret = PTR_ERR(xfer); | |
1689 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1690 | return ret; | |
1691 | } | |
1692 | req = (struct ti_sci_msg_req_reboot *)xfer->xfer_buf; | |
1693 | ||
1694 | ret = ti_sci_do_xfer(info, xfer); | |
1695 | if (ret) { | |
1696 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1697 | goto fail; | |
1698 | } | |
1699 | ||
1700 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1701 | ||
1702 | if (!ti_sci_is_response_ack(resp)) | |
1703 | ret = -ENODEV; | |
1704 | else | |
1705 | ret = 0; | |
1706 | ||
1707 | fail: | |
1708 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1709 | ||
1710 | return ret; | |
1711 | } | |
1712 | ||
9c19fb68 LV |
1713 | /** |
1714 | * ti_sci_get_resource_range - Helper to get a range of resources assigned | |
1715 | * to a host. Resource is uniquely identified by | |
1716 | * type and subtype. | |
1717 | * @handle: Pointer to TISCI handle. | |
1718 | * @dev_id: TISCI device ID. | |
1719 | * @subtype: Resource assignment subtype that is being requested | |
1720 | * from the given device. | |
1721 | * @s_host: Host processor ID to which the resources are allocated | |
967a020b PU |
1722 | * @desc: Pointer to ti_sci_resource_desc to be updated with the |
1723 | * resource range start index and number of resources | |
9c19fb68 LV |
1724 | * |
1725 | * Return: 0 if all went fine, else return appropriate error. | |
1726 | */ | |
1727 | static int ti_sci_get_resource_range(const struct ti_sci_handle *handle, | |
1728 | u32 dev_id, u8 subtype, u8 s_host, | |
967a020b | 1729 | struct ti_sci_resource_desc *desc) |
9c19fb68 LV |
1730 | { |
1731 | struct ti_sci_msg_resp_get_resource_range *resp; | |
1732 | struct ti_sci_msg_req_get_resource_range *req; | |
1733 | struct ti_sci_xfer *xfer; | |
1734 | struct ti_sci_info *info; | |
1735 | struct device *dev; | |
9c19fb68 LV |
1736 | int ret = 0; |
1737 | ||
1738 | if (IS_ERR(handle)) | |
1739 | return PTR_ERR(handle); | |
967a020b | 1740 | if (!handle || !desc) |
9c19fb68 LV |
1741 | return -EINVAL; |
1742 | ||
1743 | info = handle_to_ti_sci_info(handle); | |
1744 | dev = info->dev; | |
1745 | ||
1746 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_RESOURCE_RANGE, | |
1747 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1748 | sizeof(*req), sizeof(*resp)); | |
1749 | if (IS_ERR(xfer)) { | |
1750 | ret = PTR_ERR(xfer); | |
1751 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1752 | return ret; | |
1753 | } | |
1754 | ||
9c19fb68 LV |
1755 | req = (struct ti_sci_msg_req_get_resource_range *)xfer->xfer_buf; |
1756 | req->secondary_host = s_host; | |
9b98e02a | 1757 | req->type = dev_id & MSG_RM_RESOURCE_TYPE_MASK; |
9c19fb68 LV |
1758 | req->subtype = subtype & MSG_RM_RESOURCE_SUBTYPE_MASK; |
1759 | ||
1760 | ret = ti_sci_do_xfer(info, xfer); | |
1761 | if (ret) { | |
1762 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1763 | goto fail; | |
1764 | } | |
1765 | ||
1766 | resp = (struct ti_sci_msg_resp_get_resource_range *)xfer->xfer_buf; | |
1767 | ||
1768 | if (!ti_sci_is_response_ack(resp)) { | |
1769 | ret = -ENODEV; | |
519c5c0c PU |
1770 | } else if (!resp->range_num && !resp->range_num_sec) { |
1771 | /* Neither of the two resource range is valid */ | |
9c19fb68 LV |
1772 | ret = -ENODEV; |
1773 | } else { | |
967a020b PU |
1774 | desc->start = resp->range_start; |
1775 | desc->num = resp->range_num; | |
519c5c0c PU |
1776 | desc->start_sec = resp->range_start_sec; |
1777 | desc->num_sec = resp->range_num_sec; | |
7c1c1d36 | 1778 | } |
9c19fb68 LV |
1779 | |
1780 | fail: | |
1781 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1782 | ||
1783 | return ret; | |
1784 | } | |
1785 | ||
1786 | /** | |
1787 | * ti_sci_cmd_get_resource_range - Get a range of resources assigned to host | |
1788 | * that is same as ti sci interface host. | |
1789 | * @handle: Pointer to TISCI handle. | |
1790 | * @dev_id: TISCI device ID. | |
1791 | * @subtype: Resource assignment subtype that is being requested | |
1792 | * from the given device. | |
967a020b PU |
1793 | * @desc: Pointer to ti_sci_resource_desc to be updated with the |
1794 | * resource range start index and number of resources | |
9c19fb68 LV |
1795 | * |
1796 | * Return: 0 if all went fine, else return appropriate error. | |
1797 | */ | |
1798 | static int ti_sci_cmd_get_resource_range(const struct ti_sci_handle *handle, | |
1799 | u32 dev_id, u8 subtype, | |
967a020b | 1800 | struct ti_sci_resource_desc *desc) |
9c19fb68 LV |
1801 | { |
1802 | return ti_sci_get_resource_range(handle, dev_id, subtype, | |
1803 | TI_SCI_IRQ_SECONDARY_HOST_INVALID, | |
967a020b | 1804 | desc); |
9c19fb68 LV |
1805 | } |
1806 | ||
1807 | /** | |
1808 | * ti_sci_cmd_get_resource_range_from_shost - Get a range of resources | |
1809 | * assigned to a specified host. | |
1810 | * @handle: Pointer to TISCI handle. | |
1811 | * @dev_id: TISCI device ID. | |
1812 | * @subtype: Resource assignment subtype that is being requested | |
1813 | * from the given device. | |
1814 | * @s_host: Host processor ID to which the resources are allocated | |
967a020b PU |
1815 | * @desc: Pointer to ti_sci_resource_desc to be updated with the |
1816 | * resource range start index and number of resources | |
9c19fb68 LV |
1817 | * |
1818 | * Return: 0 if all went fine, else return appropriate error. | |
1819 | */ | |
1820 | static | |
1821 | int ti_sci_cmd_get_resource_range_from_shost(const struct ti_sci_handle *handle, | |
1822 | u32 dev_id, u8 subtype, u8 s_host, | |
967a020b | 1823 | struct ti_sci_resource_desc *desc) |
9c19fb68 | 1824 | { |
967a020b | 1825 | return ti_sci_get_resource_range(handle, dev_id, subtype, s_host, desc); |
9c19fb68 LV |
1826 | } |
1827 | ||
997b001f LV |
1828 | /** |
1829 | * ti_sci_manage_irq() - Helper api to configure/release the irq route between | |
1830 | * the requested source and destination | |
1831 | * @handle: Pointer to TISCI handle. | |
1832 | * @valid_params: Bit fields defining the validity of certain params | |
1833 | * @src_id: Device ID of the IRQ source | |
1834 | * @src_index: IRQ source index within the source device | |
1835 | * @dst_id: Device ID of the IRQ destination | |
1836 | * @dst_host_irq: IRQ number of the destination device | |
1837 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1838 | * @vint: Virtual interrupt to be used within the IA | |
1839 | * @global_event: Global event number to be used for the requesting event | |
1840 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1841 | * @s_host: Secondary host ID to which the irq/event is being | |
1842 | * requested for. | |
1843 | * @type: Request type irq set or release. | |
1844 | * | |
1845 | * Return: 0 if all went fine, else return appropriate error. | |
1846 | */ | |
1847 | static int ti_sci_manage_irq(const struct ti_sci_handle *handle, | |
1848 | u32 valid_params, u16 src_id, u16 src_index, | |
1849 | u16 dst_id, u16 dst_host_irq, u16 ia_id, u16 vint, | |
1850 | u16 global_event, u8 vint_status_bit, u8 s_host, | |
1851 | u16 type) | |
1852 | { | |
1853 | struct ti_sci_msg_req_manage_irq *req; | |
1854 | struct ti_sci_msg_hdr *resp; | |
1855 | struct ti_sci_xfer *xfer; | |
1856 | struct ti_sci_info *info; | |
1857 | struct device *dev; | |
1858 | int ret = 0; | |
1859 | ||
1860 | if (IS_ERR(handle)) | |
1861 | return PTR_ERR(handle); | |
1862 | if (!handle) | |
1863 | return -EINVAL; | |
1864 | ||
1865 | info = handle_to_ti_sci_info(handle); | |
1866 | dev = info->dev; | |
1867 | ||
1868 | xfer = ti_sci_get_one_xfer(info, type, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1869 | sizeof(*req), sizeof(*resp)); | |
1870 | if (IS_ERR(xfer)) { | |
1871 | ret = PTR_ERR(xfer); | |
1872 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1873 | return ret; | |
1874 | } | |
1875 | req = (struct ti_sci_msg_req_manage_irq *)xfer->xfer_buf; | |
1876 | req->valid_params = valid_params; | |
1877 | req->src_id = src_id; | |
1878 | req->src_index = src_index; | |
1879 | req->dst_id = dst_id; | |
1880 | req->dst_host_irq = dst_host_irq; | |
1881 | req->ia_id = ia_id; | |
1882 | req->vint = vint; | |
1883 | req->global_event = global_event; | |
1884 | req->vint_status_bit = vint_status_bit; | |
1885 | req->secondary_host = s_host; | |
1886 | ||
1887 | ret = ti_sci_do_xfer(info, xfer); | |
1888 | if (ret) { | |
1889 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1890 | goto fail; | |
1891 | } | |
1892 | ||
1893 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1894 | ||
1895 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1896 | ||
1897 | fail: | |
1898 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1899 | ||
1900 | return ret; | |
1901 | } | |
1902 | ||
1903 | /** | |
1904 | * ti_sci_set_irq() - Helper api to configure the irq route between the | |
1905 | * requested source and destination | |
1906 | * @handle: Pointer to TISCI handle. | |
1907 | * @valid_params: Bit fields defining the validity of certain params | |
1908 | * @src_id: Device ID of the IRQ source | |
1909 | * @src_index: IRQ source index within the source device | |
1910 | * @dst_id: Device ID of the IRQ destination | |
1911 | * @dst_host_irq: IRQ number of the destination device | |
1912 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1913 | * @vint: Virtual interrupt to be used within the IA | |
1914 | * @global_event: Global event number to be used for the requesting event | |
1915 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1916 | * @s_host: Secondary host ID to which the irq/event is being | |
1917 | * requested for. | |
1918 | * | |
1919 | * Return: 0 if all went fine, else return appropriate error. | |
1920 | */ | |
1921 | static int ti_sci_set_irq(const struct ti_sci_handle *handle, u32 valid_params, | |
1922 | u16 src_id, u16 src_index, u16 dst_id, | |
1923 | u16 dst_host_irq, u16 ia_id, u16 vint, | |
1924 | u16 global_event, u8 vint_status_bit, u8 s_host) | |
1925 | { | |
1926 | 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", | |
1927 | __func__, valid_params, src_id, src_index, | |
1928 | dst_id, dst_host_irq, ia_id, vint, global_event, | |
1929 | vint_status_bit); | |
1930 | ||
1931 | return ti_sci_manage_irq(handle, valid_params, src_id, src_index, | |
1932 | dst_id, dst_host_irq, ia_id, vint, | |
1933 | global_event, vint_status_bit, s_host, | |
1934 | TI_SCI_MSG_SET_IRQ); | |
1935 | } | |
1936 | ||
1937 | /** | |
1938 | * ti_sci_free_irq() - Helper api to free the irq route between the | |
1939 | * requested source and destination | |
1940 | * @handle: Pointer to TISCI handle. | |
1941 | * @valid_params: Bit fields defining the validity of certain params | |
1942 | * @src_id: Device ID of the IRQ source | |
1943 | * @src_index: IRQ source index within the source device | |
1944 | * @dst_id: Device ID of the IRQ destination | |
1945 | * @dst_host_irq: IRQ number of the destination device | |
1946 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1947 | * @vint: Virtual interrupt to be used within the IA | |
1948 | * @global_event: Global event number to be used for the requesting event | |
1949 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1950 | * @s_host: Secondary host ID to which the irq/event is being | |
1951 | * requested for. | |
1952 | * | |
1953 | * Return: 0 if all went fine, else return appropriate error. | |
1954 | */ | |
1955 | static int ti_sci_free_irq(const struct ti_sci_handle *handle, u32 valid_params, | |
1956 | u16 src_id, u16 src_index, u16 dst_id, | |
1957 | u16 dst_host_irq, u16 ia_id, u16 vint, | |
1958 | u16 global_event, u8 vint_status_bit, u8 s_host) | |
1959 | { | |
1960 | 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", | |
1961 | __func__, valid_params, src_id, src_index, | |
1962 | dst_id, dst_host_irq, ia_id, vint, global_event, | |
1963 | vint_status_bit); | |
1964 | ||
1965 | return ti_sci_manage_irq(handle, valid_params, src_id, src_index, | |
1966 | dst_id, dst_host_irq, ia_id, vint, | |
1967 | global_event, vint_status_bit, s_host, | |
1968 | TI_SCI_MSG_FREE_IRQ); | |
1969 | } | |
1970 | ||
1971 | /** | |
1972 | * ti_sci_cmd_set_irq() - Configure a host irq route between the requested | |
1973 | * source and destination. | |
1974 | * @handle: Pointer to TISCI handle. | |
1975 | * @src_id: Device ID of the IRQ source | |
1976 | * @src_index: IRQ source index within the source device | |
1977 | * @dst_id: Device ID of the IRQ destination | |
1978 | * @dst_host_irq: IRQ number of the destination device | |
997b001f LV |
1979 | * |
1980 | * Return: 0 if all went fine, else return appropriate error. | |
1981 | */ | |
1982 | static int ti_sci_cmd_set_irq(const struct ti_sci_handle *handle, u16 src_id, | |
1983 | u16 src_index, u16 dst_id, u16 dst_host_irq) | |
1984 | { | |
1985 | u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; | |
1986 | ||
1987 | return ti_sci_set_irq(handle, valid_params, src_id, src_index, dst_id, | |
1988 | dst_host_irq, 0, 0, 0, 0, 0); | |
1989 | } | |
1990 | ||
1991 | /** | |
1992 | * ti_sci_cmd_set_event_map() - Configure an event based irq route between the | |
1993 | * requested source and Interrupt Aggregator. | |
1994 | * @handle: Pointer to TISCI handle. | |
1995 | * @src_id: Device ID of the IRQ source | |
1996 | * @src_index: IRQ source index within the source device | |
1997 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1998 | * @vint: Virtual interrupt to be used within the IA | |
1999 | * @global_event: Global event number to be used for the requesting event | |
2000 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
2001 | * | |
2002 | * Return: 0 if all went fine, else return appropriate error. | |
2003 | */ | |
2004 | static int ti_sci_cmd_set_event_map(const struct ti_sci_handle *handle, | |
2005 | u16 src_id, u16 src_index, u16 ia_id, | |
2006 | u16 vint, u16 global_event, | |
2007 | u8 vint_status_bit) | |
2008 | { | |
2009 | u32 valid_params = MSG_FLAG_IA_ID_VALID | MSG_FLAG_VINT_VALID | | |
2010 | MSG_FLAG_GLB_EVNT_VALID | | |
2011 | MSG_FLAG_VINT_STS_BIT_VALID; | |
2012 | ||
2013 | return ti_sci_set_irq(handle, valid_params, src_id, src_index, 0, 0, | |
2014 | ia_id, vint, global_event, vint_status_bit, 0); | |
2015 | } | |
2016 | ||
2017 | /** | |
2018 | * ti_sci_cmd_free_irq() - Free a host irq route between the between the | |
2019 | * requested source and destination. | |
2020 | * @handle: Pointer to TISCI handle. | |
2021 | * @src_id: Device ID of the IRQ source | |
2022 | * @src_index: IRQ source index within the source device | |
2023 | * @dst_id: Device ID of the IRQ destination | |
2024 | * @dst_host_irq: IRQ number of the destination device | |
997b001f LV |
2025 | * |
2026 | * Return: 0 if all went fine, else return appropriate error. | |
2027 | */ | |
2028 | static int ti_sci_cmd_free_irq(const struct ti_sci_handle *handle, u16 src_id, | |
2029 | u16 src_index, u16 dst_id, u16 dst_host_irq) | |
2030 | { | |
2031 | u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; | |
2032 | ||
2033 | return ti_sci_free_irq(handle, valid_params, src_id, src_index, dst_id, | |
2034 | dst_host_irq, 0, 0, 0, 0, 0); | |
2035 | } | |
2036 | ||
2037 | /** | |
2038 | * ti_sci_cmd_free_event_map() - Free an event map between the requested source | |
2039 | * and Interrupt Aggregator. | |
2040 | * @handle: Pointer to TISCI handle. | |
2041 | * @src_id: Device ID of the IRQ source | |
2042 | * @src_index: IRQ source index within the source device | |
2043 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
2044 | * @vint: Virtual interrupt to be used within the IA | |
2045 | * @global_event: Global event number to be used for the requesting event | |
2046 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
2047 | * | |
2048 | * Return: 0 if all went fine, else return appropriate error. | |
2049 | */ | |
2050 | static int ti_sci_cmd_free_event_map(const struct ti_sci_handle *handle, | |
2051 | u16 src_id, u16 src_index, u16 ia_id, | |
2052 | u16 vint, u16 global_event, | |
2053 | u8 vint_status_bit) | |
2054 | { | |
2055 | u32 valid_params = MSG_FLAG_IA_ID_VALID | | |
2056 | MSG_FLAG_VINT_VALID | MSG_FLAG_GLB_EVNT_VALID | | |
2057 | MSG_FLAG_VINT_STS_BIT_VALID; | |
2058 | ||
2059 | return ti_sci_free_irq(handle, valid_params, src_id, src_index, 0, 0, | |
2060 | ia_id, vint, global_event, vint_status_bit, 0); | |
2061 | } | |
2062 | ||
3c201753 PU |
2063 | /** |
2064 | * ti_sci_cmd_rm_ring_cfg() - Configure a NAVSS ring | |
2065 | * @handle: Pointer to TI SCI handle. | |
2066 | * @params: Pointer to ti_sci_msg_rm_ring_cfg ring config structure | |
2067 | * | |
2068 | * Return: 0 if all went well, else returns appropriate error value. | |
2069 | * | |
2070 | * See @ti_sci_msg_rm_ring_cfg and @ti_sci_msg_rm_ring_cfg_req for | |
2071 | * more info. | |
2072 | */ | |
2073 | static int ti_sci_cmd_rm_ring_cfg(const struct ti_sci_handle *handle, | |
2074 | const struct ti_sci_msg_rm_ring_cfg *params) | |
2075 | { | |
2076 | struct ti_sci_msg_rm_ring_cfg_req *req; | |
2077 | struct ti_sci_msg_hdr *resp; | |
2078 | struct ti_sci_xfer *xfer; | |
2079 | struct ti_sci_info *info; | |
2080 | struct device *dev; | |
2081 | int ret = 0; | |
2082 | ||
2083 | if (IS_ERR_OR_NULL(handle)) | |
2084 | return -EINVAL; | |
2085 | ||
2086 | info = handle_to_ti_sci_info(handle); | |
2087 | dev = info->dev; | |
2088 | ||
2089 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_RM_RING_CFG, | |
2090 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2091 | sizeof(*req), sizeof(*resp)); | |
2092 | if (IS_ERR(xfer)) { | |
2093 | ret = PTR_ERR(xfer); | |
2094 | dev_err(dev, "RM_RA:Message config failed(%d)\n", ret); | |
2095 | return ret; | |
2096 | } | |
2097 | req = (struct ti_sci_msg_rm_ring_cfg_req *)xfer->xfer_buf; | |
2098 | req->valid_params = params->valid_params; | |
2099 | req->nav_id = params->nav_id; | |
2100 | req->index = params->index; | |
2101 | req->addr_lo = params->addr_lo; | |
2102 | req->addr_hi = params->addr_hi; | |
2103 | req->count = params->count; | |
2104 | req->mode = params->mode; | |
2105 | req->size = params->size; | |
2106 | req->order_id = params->order_id; | |
2107 | req->virtid = params->virtid; | |
2108 | req->asel = params->asel; | |
2109 | ||
2110 | ret = ti_sci_do_xfer(info, xfer); | |
2111 | if (ret) { | |
2112 | dev_err(dev, "RM_RA:Mbox config send fail %d\n", ret); | |
2113 | goto fail; | |
2114 | } | |
2115 | ||
2116 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2117 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2118 | ||
2119 | fail: | |
2120 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2121 | dev_dbg(dev, "RM_RA:config ring %u ret:%d\n", params->index, ret); | |
2122 | return ret; | |
2123 | } | |
2124 | ||
aa276781 | 2125 | /** |
68608b5e PU |
2126 | * ti_sci_cmd_rm_psil_pair() - Pair PSI-L source to destination thread |
2127 | * @handle: Pointer to TI SCI handle. | |
2128 | * @nav_id: Device ID of Navigator Subsystem which should be used for | |
2129 | * pairing | |
2130 | * @src_thread: Source PSI-L thread ID | |
2131 | * @dst_thread: Destination PSI-L thread ID | |
aa276781 | 2132 | * |
68608b5e | 2133 | * Return: 0 if all went well, else returns appropriate error value. |
aa276781 | 2134 | */ |
68608b5e PU |
2135 | static int ti_sci_cmd_rm_psil_pair(const struct ti_sci_handle *handle, |
2136 | u32 nav_id, u32 src_thread, u32 dst_thread) | |
aa276781 | 2137 | { |
68608b5e PU |
2138 | struct ti_sci_msg_psil_pair *req; |
2139 | struct ti_sci_msg_hdr *resp; | |
2140 | struct ti_sci_xfer *xfer; | |
aa276781 | 2141 | struct ti_sci_info *info; |
68608b5e PU |
2142 | struct device *dev; |
2143 | int ret = 0; | |
aa276781 NM |
2144 | |
2145 | if (IS_ERR(handle)) | |
2146 | return PTR_ERR(handle); | |
2147 | if (!handle) | |
2148 | return -EINVAL; | |
2149 | ||
2150 | info = handle_to_ti_sci_info(handle); | |
68608b5e | 2151 | dev = info->dev; |
aa276781 | 2152 | |
68608b5e PU |
2153 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_RM_PSIL_PAIR, |
2154 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2155 | sizeof(*req), sizeof(*resp)); | |
2156 | if (IS_ERR(xfer)) { | |
2157 | ret = PTR_ERR(xfer); | |
2158 | dev_err(dev, "RM_PSIL:Message reconfig failed(%d)\n", ret); | |
2159 | return ret; | |
2160 | } | |
2161 | req = (struct ti_sci_msg_psil_pair *)xfer->xfer_buf; | |
2162 | req->nav_id = nav_id; | |
2163 | req->src_thread = src_thread; | |
2164 | req->dst_thread = dst_thread; | |
aa276781 | 2165 | |
68608b5e PU |
2166 | ret = ti_sci_do_xfer(info, xfer); |
2167 | if (ret) { | |
2168 | dev_err(dev, "RM_PSIL:Mbox send fail %d\n", ret); | |
2169 | goto fail; | |
2170 | } | |
aa276781 | 2171 | |
68608b5e PU |
2172 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; |
2173 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2174 | ||
2175 | fail: | |
2176 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2177 | ||
2178 | return ret; | |
aa276781 NM |
2179 | } |
2180 | ||
2181 | /** | |
68608b5e PU |
2182 | * ti_sci_cmd_rm_psil_unpair() - Unpair PSI-L source from destination thread |
2183 | * @handle: Pointer to TI SCI handle. | |
2184 | * @nav_id: Device ID of Navigator Subsystem which should be used for | |
2185 | * unpairing | |
2186 | * @src_thread: Source PSI-L thread ID | |
2187 | * @dst_thread: Destination PSI-L thread ID | |
aa276781 | 2188 | * |
68608b5e | 2189 | * Return: 0 if all went well, else returns appropriate error value. |
aa276781 | 2190 | */ |
68608b5e PU |
2191 | static int ti_sci_cmd_rm_psil_unpair(const struct ti_sci_handle *handle, |
2192 | u32 nav_id, u32 src_thread, u32 dst_thread) | |
aa276781 | 2193 | { |
68608b5e PU |
2194 | struct ti_sci_msg_psil_unpair *req; |
2195 | struct ti_sci_msg_hdr *resp; | |
2196 | struct ti_sci_xfer *xfer; | |
2197 | struct ti_sci_info *info; | |
2198 | struct device *dev; | |
2199 | int ret = 0; | |
aa276781 | 2200 | |
68608b5e PU |
2201 | if (IS_ERR(handle)) |
2202 | return PTR_ERR(handle); | |
2203 | if (!handle) | |
2204 | return -EINVAL; | |
aa276781 | 2205 | |
68608b5e PU |
2206 | info = handle_to_ti_sci_info(handle); |
2207 | dev = info->dev; | |
2208 | ||
2209 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_RM_PSIL_UNPAIR, | |
2210 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2211 | sizeof(*req), sizeof(*resp)); | |
2212 | if (IS_ERR(xfer)) { | |
2213 | ret = PTR_ERR(xfer); | |
2214 | dev_err(dev, "RM_PSIL:Message reconfig failed(%d)\n", ret); | |
2215 | return ret; | |
aa276781 | 2216 | } |
68608b5e PU |
2217 | req = (struct ti_sci_msg_psil_unpair *)xfer->xfer_buf; |
2218 | req->nav_id = nav_id; | |
2219 | req->src_thread = src_thread; | |
2220 | req->dst_thread = dst_thread; | |
aa276781 | 2221 | |
68608b5e PU |
2222 | ret = ti_sci_do_xfer(info, xfer); |
2223 | if (ret) { | |
2224 | dev_err(dev, "RM_PSIL:Mbox send fail %d\n", ret); | |
2225 | goto fail; | |
2226 | } | |
2227 | ||
2228 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2229 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2230 | ||
2231 | fail: | |
2232 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2233 | ||
2234 | return ret; | |
aa276781 | 2235 | } |
aa276781 | 2236 | |
905c3047 | 2237 | /** |
68608b5e PU |
2238 | * ti_sci_cmd_rm_udmap_tx_ch_cfg() - Configure a UDMAP TX channel |
2239 | * @handle: Pointer to TI SCI handle. | |
2240 | * @params: Pointer to ti_sci_msg_rm_udmap_tx_ch_cfg TX channel config | |
2241 | * structure | |
905c3047 | 2242 | * |
68608b5e PU |
2243 | * Return: 0 if all went well, else returns appropriate error value. |
2244 | * | |
2245 | * See @ti_sci_msg_rm_udmap_tx_ch_cfg and @ti_sci_msg_rm_udmap_tx_ch_cfg_req for | |
2246 | * more info. | |
905c3047 | 2247 | */ |
68608b5e PU |
2248 | static int ti_sci_cmd_rm_udmap_tx_ch_cfg(const struct ti_sci_handle *handle, |
2249 | const struct ti_sci_msg_rm_udmap_tx_ch_cfg *params) | |
905c3047 | 2250 | { |
68608b5e PU |
2251 | struct ti_sci_msg_rm_udmap_tx_ch_cfg_req *req; |
2252 | struct ti_sci_msg_hdr *resp; | |
2253 | struct ti_sci_xfer *xfer; | |
905c3047 | 2254 | struct ti_sci_info *info; |
68608b5e PU |
2255 | struct device *dev; |
2256 | int ret = 0; | |
905c3047 | 2257 | |
68608b5e PU |
2258 | if (IS_ERR_OR_NULL(handle)) |
2259 | return -EINVAL; | |
2260 | ||
2261 | info = handle_to_ti_sci_info(handle); | |
2262 | dev = info->dev; | |
2263 | ||
2264 | xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_TX_CH_CFG, | |
2265 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2266 | sizeof(*req), sizeof(*resp)); | |
2267 | if (IS_ERR(xfer)) { | |
2268 | ret = PTR_ERR(xfer); | |
4c960505 | 2269 | dev_err(dev, "Message TX_CH_CFG alloc failed(%d)\n", ret); |
68608b5e PU |
2270 | return ret; |
2271 | } | |
2272 | req = (struct ti_sci_msg_rm_udmap_tx_ch_cfg_req *)xfer->xfer_buf; | |
2273 | req->valid_params = params->valid_params; | |
2274 | req->nav_id = params->nav_id; | |
2275 | req->index = params->index; | |
2276 | req->tx_pause_on_err = params->tx_pause_on_err; | |
2277 | req->tx_filt_einfo = params->tx_filt_einfo; | |
2278 | req->tx_filt_pswords = params->tx_filt_pswords; | |
2279 | req->tx_atype = params->tx_atype; | |
2280 | req->tx_chan_type = params->tx_chan_type; | |
2281 | req->tx_supr_tdpkt = params->tx_supr_tdpkt; | |
2282 | req->tx_fetch_size = params->tx_fetch_size; | |
2283 | req->tx_credit_count = params->tx_credit_count; | |
2284 | req->txcq_qnum = params->txcq_qnum; | |
2285 | req->tx_priority = params->tx_priority; | |
2286 | req->tx_qos = params->tx_qos; | |
2287 | req->tx_orderid = params->tx_orderid; | |
2288 | req->fdepth = params->fdepth; | |
2289 | req->tx_sched_priority = params->tx_sched_priority; | |
2290 | req->tx_burst_size = params->tx_burst_size; | |
1c552e08 | 2291 | req->tx_tdtype = params->tx_tdtype; |
ce1feed5 | 2292 | req->extended_ch_type = params->extended_ch_type; |
68608b5e PU |
2293 | |
2294 | ret = ti_sci_do_xfer(info, xfer); | |
2295 | if (ret) { | |
4c960505 | 2296 | dev_err(dev, "Mbox send TX_CH_CFG fail %d\n", ret); |
68608b5e PU |
2297 | goto fail; |
2298 | } | |
2299 | ||
2300 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2301 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2302 | ||
2303 | fail: | |
2304 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
4c960505 | 2305 | dev_dbg(dev, "TX_CH_CFG: chn %u ret:%u\n", params->index, ret); |
68608b5e PU |
2306 | return ret; |
2307 | } | |
2308 | ||
2309 | /** | |
2310 | * ti_sci_cmd_rm_udmap_rx_ch_cfg() - Configure a UDMAP RX channel | |
2311 | * @handle: Pointer to TI SCI handle. | |
2312 | * @params: Pointer to ti_sci_msg_rm_udmap_rx_ch_cfg RX channel config | |
2313 | * structure | |
2314 | * | |
2315 | * Return: 0 if all went well, else returns appropriate error value. | |
2316 | * | |
2317 | * See @ti_sci_msg_rm_udmap_rx_ch_cfg and @ti_sci_msg_rm_udmap_rx_ch_cfg_req for | |
2318 | * more info. | |
2319 | */ | |
2320 | static int ti_sci_cmd_rm_udmap_rx_ch_cfg(const struct ti_sci_handle *handle, | |
2321 | const struct ti_sci_msg_rm_udmap_rx_ch_cfg *params) | |
2322 | { | |
2323 | struct ti_sci_msg_rm_udmap_rx_ch_cfg_req *req; | |
2324 | struct ti_sci_msg_hdr *resp; | |
2325 | struct ti_sci_xfer *xfer; | |
2326 | struct ti_sci_info *info; | |
2327 | struct device *dev; | |
2328 | int ret = 0; | |
2329 | ||
2330 | if (IS_ERR_OR_NULL(handle)) | |
2331 | return -EINVAL; | |
2332 | ||
2333 | info = handle_to_ti_sci_info(handle); | |
2334 | dev = info->dev; | |
2335 | ||
2336 | xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_RX_CH_CFG, | |
2337 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2338 | sizeof(*req), sizeof(*resp)); | |
2339 | if (IS_ERR(xfer)) { | |
2340 | ret = PTR_ERR(xfer); | |
4c960505 | 2341 | dev_err(dev, "Message RX_CH_CFG alloc failed(%d)\n", ret); |
68608b5e PU |
2342 | return ret; |
2343 | } | |
2344 | req = (struct ti_sci_msg_rm_udmap_rx_ch_cfg_req *)xfer->xfer_buf; | |
2345 | req->valid_params = params->valid_params; | |
2346 | req->nav_id = params->nav_id; | |
2347 | req->index = params->index; | |
2348 | req->rx_fetch_size = params->rx_fetch_size; | |
2349 | req->rxcq_qnum = params->rxcq_qnum; | |
2350 | req->rx_priority = params->rx_priority; | |
2351 | req->rx_qos = params->rx_qos; | |
2352 | req->rx_orderid = params->rx_orderid; | |
2353 | req->rx_sched_priority = params->rx_sched_priority; | |
2354 | req->flowid_start = params->flowid_start; | |
2355 | req->flowid_cnt = params->flowid_cnt; | |
2356 | req->rx_pause_on_err = params->rx_pause_on_err; | |
2357 | req->rx_atype = params->rx_atype; | |
2358 | req->rx_chan_type = params->rx_chan_type; | |
2359 | req->rx_ignore_short = params->rx_ignore_short; | |
2360 | req->rx_ignore_long = params->rx_ignore_long; | |
2361 | req->rx_burst_size = params->rx_burst_size; | |
2362 | ||
2363 | ret = ti_sci_do_xfer(info, xfer); | |
2364 | if (ret) { | |
4c960505 | 2365 | dev_err(dev, "Mbox send RX_CH_CFG fail %d\n", ret); |
68608b5e PU |
2366 | goto fail; |
2367 | } | |
2368 | ||
2369 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2370 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2371 | ||
2372 | fail: | |
2373 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
4c960505 | 2374 | dev_dbg(dev, "RX_CH_CFG: chn %u ret:%d\n", params->index, ret); |
68608b5e PU |
2375 | return ret; |
2376 | } | |
2377 | ||
2378 | /** | |
2379 | * ti_sci_cmd_rm_udmap_rx_flow_cfg() - Configure UDMAP RX FLOW | |
2380 | * @handle: Pointer to TI SCI handle. | |
2381 | * @params: Pointer to ti_sci_msg_rm_udmap_flow_cfg RX FLOW config | |
2382 | * structure | |
2383 | * | |
2384 | * Return: 0 if all went well, else returns appropriate error value. | |
2385 | * | |
2386 | * See @ti_sci_msg_rm_udmap_flow_cfg and @ti_sci_msg_rm_udmap_flow_cfg_req for | |
2387 | * more info. | |
2388 | */ | |
2389 | static int ti_sci_cmd_rm_udmap_rx_flow_cfg(const struct ti_sci_handle *handle, | |
2390 | const struct ti_sci_msg_rm_udmap_flow_cfg *params) | |
2391 | { | |
2392 | struct ti_sci_msg_rm_udmap_flow_cfg_req *req; | |
2393 | struct ti_sci_msg_hdr *resp; | |
2394 | struct ti_sci_xfer *xfer; | |
2395 | struct ti_sci_info *info; | |
2396 | struct device *dev; | |
2397 | int ret = 0; | |
2398 | ||
2399 | if (IS_ERR_OR_NULL(handle)) | |
2400 | return -EINVAL; | |
2401 | ||
2402 | info = handle_to_ti_sci_info(handle); | |
2403 | dev = info->dev; | |
2404 | ||
2405 | xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_FLOW_CFG, | |
2406 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2407 | sizeof(*req), sizeof(*resp)); | |
2408 | if (IS_ERR(xfer)) { | |
2409 | ret = PTR_ERR(xfer); | |
2410 | dev_err(dev, "RX_FL_CFG: Message alloc failed(%d)\n", ret); | |
2411 | return ret; | |
2412 | } | |
2413 | req = (struct ti_sci_msg_rm_udmap_flow_cfg_req *)xfer->xfer_buf; | |
2414 | req->valid_params = params->valid_params; | |
2415 | req->nav_id = params->nav_id; | |
2416 | req->flow_index = params->flow_index; | |
2417 | req->rx_einfo_present = params->rx_einfo_present; | |
2418 | req->rx_psinfo_present = params->rx_psinfo_present; | |
2419 | req->rx_error_handling = params->rx_error_handling; | |
2420 | req->rx_desc_type = params->rx_desc_type; | |
2421 | req->rx_sop_offset = params->rx_sop_offset; | |
2422 | req->rx_dest_qnum = params->rx_dest_qnum; | |
2423 | req->rx_src_tag_hi = params->rx_src_tag_hi; | |
2424 | req->rx_src_tag_lo = params->rx_src_tag_lo; | |
2425 | req->rx_dest_tag_hi = params->rx_dest_tag_hi; | |
2426 | req->rx_dest_tag_lo = params->rx_dest_tag_lo; | |
2427 | req->rx_src_tag_hi_sel = params->rx_src_tag_hi_sel; | |
2428 | req->rx_src_tag_lo_sel = params->rx_src_tag_lo_sel; | |
2429 | req->rx_dest_tag_hi_sel = params->rx_dest_tag_hi_sel; | |
2430 | req->rx_dest_tag_lo_sel = params->rx_dest_tag_lo_sel; | |
2431 | req->rx_fdq0_sz0_qnum = params->rx_fdq0_sz0_qnum; | |
2432 | req->rx_fdq1_qnum = params->rx_fdq1_qnum; | |
2433 | req->rx_fdq2_qnum = params->rx_fdq2_qnum; | |
2434 | req->rx_fdq3_qnum = params->rx_fdq3_qnum; | |
2435 | req->rx_ps_location = params->rx_ps_location; | |
2436 | ||
2437 | ret = ti_sci_do_xfer(info, xfer); | |
2438 | if (ret) { | |
2439 | dev_err(dev, "RX_FL_CFG: Mbox send fail %d\n", ret); | |
2440 | goto fail; | |
2441 | } | |
2442 | ||
2443 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2444 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2445 | ||
2446 | fail: | |
2447 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2448 | dev_dbg(info->dev, "RX_FL_CFG: %u ret:%d\n", params->flow_index, ret); | |
2449 | return ret; | |
2450 | } | |
2451 | ||
1e407f33 SA |
2452 | /** |
2453 | * ti_sci_cmd_proc_request() - Command to request a physical processor control | |
2454 | * @handle: Pointer to TI SCI handle | |
2455 | * @proc_id: Processor ID this request is for | |
2456 | * | |
2457 | * Return: 0 if all went well, else returns appropriate error value. | |
2458 | */ | |
2459 | static int ti_sci_cmd_proc_request(const struct ti_sci_handle *handle, | |
2460 | u8 proc_id) | |
2461 | { | |
2462 | struct ti_sci_msg_req_proc_request *req; | |
2463 | struct ti_sci_msg_hdr *resp; | |
2464 | struct ti_sci_info *info; | |
2465 | struct ti_sci_xfer *xfer; | |
2466 | struct device *dev; | |
2467 | int ret = 0; | |
2468 | ||
2469 | if (!handle) | |
2470 | return -EINVAL; | |
2471 | if (IS_ERR(handle)) | |
2472 | return PTR_ERR(handle); | |
2473 | ||
2474 | info = handle_to_ti_sci_info(handle); | |
2475 | dev = info->dev; | |
2476 | ||
2477 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_REQUEST, | |
2478 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2479 | sizeof(*req), sizeof(*resp)); | |
2480 | if (IS_ERR(xfer)) { | |
2481 | ret = PTR_ERR(xfer); | |
2482 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2483 | return ret; | |
2484 | } | |
2485 | req = (struct ti_sci_msg_req_proc_request *)xfer->xfer_buf; | |
2486 | req->processor_id = proc_id; | |
2487 | ||
2488 | ret = ti_sci_do_xfer(info, xfer); | |
2489 | if (ret) { | |
2490 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2491 | goto fail; | |
2492 | } | |
2493 | ||
2494 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2495 | ||
2496 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2497 | ||
2498 | fail: | |
2499 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2500 | ||
2501 | return ret; | |
2502 | } | |
2503 | ||
2504 | /** | |
2505 | * ti_sci_cmd_proc_release() - Command to release a physical processor control | |
2506 | * @handle: Pointer to TI SCI handle | |
2507 | * @proc_id: Processor ID this request is for | |
2508 | * | |
2509 | * Return: 0 if all went well, else returns appropriate error value. | |
2510 | */ | |
2511 | static int ti_sci_cmd_proc_release(const struct ti_sci_handle *handle, | |
2512 | u8 proc_id) | |
2513 | { | |
2514 | struct ti_sci_msg_req_proc_release *req; | |
2515 | struct ti_sci_msg_hdr *resp; | |
2516 | struct ti_sci_info *info; | |
2517 | struct ti_sci_xfer *xfer; | |
2518 | struct device *dev; | |
2519 | int ret = 0; | |
2520 | ||
2521 | if (!handle) | |
2522 | return -EINVAL; | |
2523 | if (IS_ERR(handle)) | |
2524 | return PTR_ERR(handle); | |
2525 | ||
2526 | info = handle_to_ti_sci_info(handle); | |
2527 | dev = info->dev; | |
2528 | ||
2529 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_RELEASE, | |
2530 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2531 | sizeof(*req), sizeof(*resp)); | |
2532 | if (IS_ERR(xfer)) { | |
2533 | ret = PTR_ERR(xfer); | |
2534 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2535 | return ret; | |
2536 | } | |
2537 | req = (struct ti_sci_msg_req_proc_release *)xfer->xfer_buf; | |
2538 | req->processor_id = proc_id; | |
2539 | ||
2540 | ret = ti_sci_do_xfer(info, xfer); | |
2541 | if (ret) { | |
2542 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2543 | goto fail; | |
2544 | } | |
2545 | ||
2546 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2547 | ||
2548 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2549 | ||
2550 | fail: | |
2551 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2552 | ||
2553 | return ret; | |
2554 | } | |
2555 | ||
2556 | /** | |
2557 | * ti_sci_cmd_proc_handover() - Command to handover a physical processor | |
2558 | * control to a host in the processor's access | |
2559 | * control list. | |
2560 | * @handle: Pointer to TI SCI handle | |
2561 | * @proc_id: Processor ID this request is for | |
2562 | * @host_id: Host ID to get the control of the processor | |
2563 | * | |
2564 | * Return: 0 if all went well, else returns appropriate error value. | |
2565 | */ | |
2566 | static int ti_sci_cmd_proc_handover(const struct ti_sci_handle *handle, | |
2567 | u8 proc_id, u8 host_id) | |
2568 | { | |
2569 | struct ti_sci_msg_req_proc_handover *req; | |
2570 | struct ti_sci_msg_hdr *resp; | |
2571 | struct ti_sci_info *info; | |
2572 | struct ti_sci_xfer *xfer; | |
2573 | struct device *dev; | |
2574 | int ret = 0; | |
2575 | ||
2576 | if (!handle) | |
2577 | return -EINVAL; | |
2578 | if (IS_ERR(handle)) | |
2579 | return PTR_ERR(handle); | |
2580 | ||
2581 | info = handle_to_ti_sci_info(handle); | |
2582 | dev = info->dev; | |
2583 | ||
2584 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_HANDOVER, | |
2585 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2586 | sizeof(*req), sizeof(*resp)); | |
2587 | if (IS_ERR(xfer)) { | |
2588 | ret = PTR_ERR(xfer); | |
2589 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2590 | return ret; | |
2591 | } | |
2592 | req = (struct ti_sci_msg_req_proc_handover *)xfer->xfer_buf; | |
2593 | req->processor_id = proc_id; | |
2594 | req->host_id = host_id; | |
2595 | ||
2596 | ret = ti_sci_do_xfer(info, xfer); | |
2597 | if (ret) { | |
2598 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2599 | goto fail; | |
2600 | } | |
2601 | ||
2602 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2603 | ||
2604 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2605 | ||
2606 | fail: | |
2607 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2608 | ||
2609 | return ret; | |
2610 | } | |
2611 | ||
2612 | /** | |
2613 | * ti_sci_cmd_proc_set_config() - Command to set the processor boot | |
2614 | * configuration flags | |
2615 | * @handle: Pointer to TI SCI handle | |
2616 | * @proc_id: Processor ID this request is for | |
3e67fd8d | 2617 | * @bootvector: Processor Boot vector (start address) |
1e407f33 SA |
2618 | * @config_flags_set: Configuration flags to be set |
2619 | * @config_flags_clear: Configuration flags to be cleared. | |
2620 | * | |
2621 | * Return: 0 if all went well, else returns appropriate error value. | |
2622 | */ | |
2623 | static int ti_sci_cmd_proc_set_config(const struct ti_sci_handle *handle, | |
2624 | u8 proc_id, u64 bootvector, | |
2625 | u32 config_flags_set, | |
2626 | u32 config_flags_clear) | |
2627 | { | |
2628 | struct ti_sci_msg_req_set_config *req; | |
2629 | struct ti_sci_msg_hdr *resp; | |
2630 | struct ti_sci_info *info; | |
2631 | struct ti_sci_xfer *xfer; | |
2632 | struct device *dev; | |
2633 | int ret = 0; | |
2634 | ||
2635 | if (!handle) | |
2636 | return -EINVAL; | |
2637 | if (IS_ERR(handle)) | |
2638 | return PTR_ERR(handle); | |
2639 | ||
2640 | info = handle_to_ti_sci_info(handle); | |
2641 | dev = info->dev; | |
2642 | ||
2643 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CONFIG, | |
2644 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2645 | sizeof(*req), sizeof(*resp)); | |
2646 | if (IS_ERR(xfer)) { | |
2647 | ret = PTR_ERR(xfer); | |
2648 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2649 | return ret; | |
2650 | } | |
2651 | req = (struct ti_sci_msg_req_set_config *)xfer->xfer_buf; | |
2652 | req->processor_id = proc_id; | |
2653 | req->bootvector_low = bootvector & TI_SCI_ADDR_LOW_MASK; | |
2654 | req->bootvector_high = (bootvector & TI_SCI_ADDR_HIGH_MASK) >> | |
2655 | TI_SCI_ADDR_HIGH_SHIFT; | |
2656 | req->config_flags_set = config_flags_set; | |
2657 | req->config_flags_clear = config_flags_clear; | |
2658 | ||
2659 | ret = ti_sci_do_xfer(info, xfer); | |
2660 | if (ret) { | |
2661 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2662 | goto fail; | |
2663 | } | |
2664 | ||
2665 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2666 | ||
2667 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2668 | ||
2669 | fail: | |
2670 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2671 | ||
2672 | return ret; | |
2673 | } | |
2674 | ||
2675 | /** | |
2676 | * ti_sci_cmd_proc_set_control() - Command to set the processor boot | |
2677 | * control flags | |
2678 | * @handle: Pointer to TI SCI handle | |
2679 | * @proc_id: Processor ID this request is for | |
2680 | * @control_flags_set: Control flags to be set | |
2681 | * @control_flags_clear: Control flags to be cleared | |
2682 | * | |
2683 | * Return: 0 if all went well, else returns appropriate error value. | |
2684 | */ | |
2685 | static int ti_sci_cmd_proc_set_control(const struct ti_sci_handle *handle, | |
2686 | u8 proc_id, u32 control_flags_set, | |
2687 | u32 control_flags_clear) | |
2688 | { | |
2689 | struct ti_sci_msg_req_set_ctrl *req; | |
2690 | struct ti_sci_msg_hdr *resp; | |
2691 | struct ti_sci_info *info; | |
2692 | struct ti_sci_xfer *xfer; | |
2693 | struct device *dev; | |
2694 | int ret = 0; | |
2695 | ||
2696 | if (!handle) | |
2697 | return -EINVAL; | |
2698 | if (IS_ERR(handle)) | |
2699 | return PTR_ERR(handle); | |
2700 | ||
2701 | info = handle_to_ti_sci_info(handle); | |
2702 | dev = info->dev; | |
2703 | ||
2704 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CTRL, | |
2705 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2706 | sizeof(*req), sizeof(*resp)); | |
2707 | if (IS_ERR(xfer)) { | |
2708 | ret = PTR_ERR(xfer); | |
2709 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2710 | return ret; | |
2711 | } | |
2712 | req = (struct ti_sci_msg_req_set_ctrl *)xfer->xfer_buf; | |
2713 | req->processor_id = proc_id; | |
2714 | req->control_flags_set = control_flags_set; | |
2715 | req->control_flags_clear = control_flags_clear; | |
2716 | ||
2717 | ret = ti_sci_do_xfer(info, xfer); | |
2718 | if (ret) { | |
2719 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2720 | goto fail; | |
2721 | } | |
2722 | ||
2723 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2724 | ||
2725 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2726 | ||
2727 | fail: | |
2728 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2729 | ||
2730 | return ret; | |
2731 | } | |
2732 | ||
2733 | /** | |
3e67fd8d | 2734 | * ti_sci_cmd_proc_get_status() - Command to get the processor boot status |
1e407f33 SA |
2735 | * @handle: Pointer to TI SCI handle |
2736 | * @proc_id: Processor ID this request is for | |
3e67fd8d NM |
2737 | * @bv: Processor Boot vector (start address) |
2738 | * @cfg_flags: Processor specific configuration flags | |
2739 | * @ctrl_flags: Processor specific control flags | |
2740 | * @sts_flags: Processor specific status flags | |
1e407f33 SA |
2741 | * |
2742 | * Return: 0 if all went well, else returns appropriate error value. | |
2743 | */ | |
2744 | static int ti_sci_cmd_proc_get_status(const struct ti_sci_handle *handle, | |
2745 | u8 proc_id, u64 *bv, u32 *cfg_flags, | |
2746 | u32 *ctrl_flags, u32 *sts_flags) | |
2747 | { | |
2748 | struct ti_sci_msg_resp_get_status *resp; | |
2749 | struct ti_sci_msg_req_get_status *req; | |
2750 | struct ti_sci_info *info; | |
2751 | struct ti_sci_xfer *xfer; | |
2752 | struct device *dev; | |
2753 | int ret = 0; | |
2754 | ||
2755 | if (!handle) | |
2756 | return -EINVAL; | |
2757 | if (IS_ERR(handle)) | |
2758 | return PTR_ERR(handle); | |
2759 | ||
2760 | info = handle_to_ti_sci_info(handle); | |
2761 | dev = info->dev; | |
2762 | ||
2763 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_STATUS, | |
2764 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2765 | sizeof(*req), sizeof(*resp)); | |
2766 | if (IS_ERR(xfer)) { | |
2767 | ret = PTR_ERR(xfer); | |
2768 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2769 | return ret; | |
2770 | } | |
2771 | req = (struct ti_sci_msg_req_get_status *)xfer->xfer_buf; | |
2772 | req->processor_id = proc_id; | |
2773 | ||
2774 | ret = ti_sci_do_xfer(info, xfer); | |
2775 | if (ret) { | |
2776 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2777 | goto fail; | |
2778 | } | |
2779 | ||
2780 | resp = (struct ti_sci_msg_resp_get_status *)xfer->tx_message.buf; | |
2781 | ||
2782 | if (!ti_sci_is_response_ack(resp)) { | |
2783 | ret = -ENODEV; | |
2784 | } else { | |
2785 | *bv = (resp->bootvector_low & TI_SCI_ADDR_LOW_MASK) | | |
2786 | (((u64)resp->bootvector_high << TI_SCI_ADDR_HIGH_SHIFT) & | |
2787 | TI_SCI_ADDR_HIGH_MASK); | |
2788 | *cfg_flags = resp->config_flags; | |
2789 | *ctrl_flags = resp->control_flags; | |
2790 | *sts_flags = resp->status_flags; | |
2791 | } | |
2792 | ||
2793 | fail: | |
2794 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2795 | ||
2796 | return ret; | |
2797 | } | |
2798 | ||
9e7d756d NM |
2799 | /* |
2800 | * ti_sci_setup_ops() - Setup the operations structures | |
2801 | * @info: pointer to TISCI pointer | |
2802 | */ | |
2803 | static void ti_sci_setup_ops(struct ti_sci_info *info) | |
2804 | { | |
2805 | struct ti_sci_ops *ops = &info->handle.ops; | |
912cffb4 | 2806 | struct ti_sci_core_ops *core_ops = &ops->core_ops; |
9e7d756d | 2807 | struct ti_sci_dev_ops *dops = &ops->dev_ops; |
9f723220 | 2808 | struct ti_sci_clk_ops *cops = &ops->clk_ops; |
9c19fb68 | 2809 | struct ti_sci_rm_core_ops *rm_core_ops = &ops->rm_core_ops; |
997b001f | 2810 | struct ti_sci_rm_irq_ops *iops = &ops->rm_irq_ops; |
68608b5e PU |
2811 | struct ti_sci_rm_ringacc_ops *rops = &ops->rm_ring_ops; |
2812 | struct ti_sci_rm_psil_ops *psilops = &ops->rm_psil_ops; | |
2813 | struct ti_sci_rm_udmap_ops *udmap_ops = &ops->rm_udmap_ops; | |
1e407f33 | 2814 | struct ti_sci_proc_ops *pops = &ops->proc_ops; |
9e7d756d | 2815 | |
912cffb4 NM |
2816 | core_ops->reboot_device = ti_sci_cmd_core_reboot; |
2817 | ||
9e7d756d | 2818 | dops->get_device = ti_sci_cmd_get_device; |
45b659ee | 2819 | dops->get_device_exclusive = ti_sci_cmd_get_device_exclusive; |
9e7d756d | 2820 | dops->idle_device = ti_sci_cmd_idle_device; |
45b659ee | 2821 | dops->idle_device_exclusive = ti_sci_cmd_idle_device_exclusive; |
9e7d756d NM |
2822 | dops->put_device = ti_sci_cmd_put_device; |
2823 | ||
2824 | dops->is_valid = ti_sci_cmd_dev_is_valid; | |
2825 | dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt; | |
2826 | dops->is_idle = ti_sci_cmd_dev_is_idle; | |
2827 | dops->is_stop = ti_sci_cmd_dev_is_stop; | |
2828 | dops->is_on = ti_sci_cmd_dev_is_on; | |
2829 | dops->is_transitioning = ti_sci_cmd_dev_is_trans; | |
2830 | dops->set_device_resets = ti_sci_cmd_set_device_resets; | |
2831 | dops->get_device_resets = ti_sci_cmd_get_device_resets; | |
9f723220 NM |
2832 | |
2833 | cops->get_clock = ti_sci_cmd_get_clock; | |
2834 | cops->idle_clock = ti_sci_cmd_idle_clock; | |
2835 | cops->put_clock = ti_sci_cmd_put_clock; | |
2836 | cops->is_auto = ti_sci_cmd_clk_is_auto; | |
2837 | cops->is_on = ti_sci_cmd_clk_is_on; | |
2838 | cops->is_off = ti_sci_cmd_clk_is_off; | |
2839 | ||
2840 | cops->set_parent = ti_sci_cmd_clk_set_parent; | |
2841 | cops->get_parent = ti_sci_cmd_clk_get_parent; | |
2842 | cops->get_num_parents = ti_sci_cmd_clk_get_num_parents; | |
2843 | ||
2844 | cops->get_best_match_freq = ti_sci_cmd_clk_get_match_freq; | |
2845 | cops->set_freq = ti_sci_cmd_clk_set_freq; | |
2846 | cops->get_freq = ti_sci_cmd_clk_get_freq; | |
9c19fb68 LV |
2847 | |
2848 | rm_core_ops->get_range = ti_sci_cmd_get_resource_range; | |
2849 | rm_core_ops->get_range_from_shost = | |
2850 | ti_sci_cmd_get_resource_range_from_shost; | |
997b001f LV |
2851 | |
2852 | iops->set_irq = ti_sci_cmd_set_irq; | |
2853 | iops->set_event_map = ti_sci_cmd_set_event_map; | |
2854 | iops->free_irq = ti_sci_cmd_free_irq; | |
2855 | iops->free_event_map = ti_sci_cmd_free_event_map; | |
68608b5e | 2856 | |
3c201753 | 2857 | rops->set_cfg = ti_sci_cmd_rm_ring_cfg; |
68608b5e PU |
2858 | |
2859 | psilops->pair = ti_sci_cmd_rm_psil_pair; | |
2860 | psilops->unpair = ti_sci_cmd_rm_psil_unpair; | |
2861 | ||
2862 | udmap_ops->tx_ch_cfg = ti_sci_cmd_rm_udmap_tx_ch_cfg; | |
2863 | udmap_ops->rx_ch_cfg = ti_sci_cmd_rm_udmap_rx_ch_cfg; | |
2864 | udmap_ops->rx_flow_cfg = ti_sci_cmd_rm_udmap_rx_flow_cfg; | |
1e407f33 SA |
2865 | |
2866 | pops->request = ti_sci_cmd_proc_request; | |
2867 | pops->release = ti_sci_cmd_proc_release; | |
2868 | pops->handover = ti_sci_cmd_proc_handover; | |
2869 | pops->set_config = ti_sci_cmd_proc_set_config; | |
2870 | pops->set_control = ti_sci_cmd_proc_set_control; | |
2871 | pops->get_status = ti_sci_cmd_proc_get_status; | |
9e7d756d NM |
2872 | } |
2873 | ||
aa276781 NM |
2874 | /** |
2875 | * ti_sci_get_handle() - Get the TI SCI handle for a device | |
2876 | * @dev: Pointer to device for which we want SCI handle | |
2877 | * | |
2878 | * NOTE: The function does not track individual clients of the framework | |
2879 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2880 | * ti_sci_put_handle must be balanced with successful ti_sci_get_handle | |
2881 | * Return: pointer to handle if successful, else: | |
2882 | * -EPROBE_DEFER if the instance is not ready | |
2883 | * -ENODEV if the required node handler is missing | |
2884 | * -EINVAL if invalid conditions are encountered. | |
2885 | */ | |
2886 | const struct ti_sci_handle *ti_sci_get_handle(struct device *dev) | |
2887 | { | |
2888 | struct device_node *ti_sci_np; | |
2889 | struct list_head *p; | |
2890 | struct ti_sci_handle *handle = NULL; | |
2891 | struct ti_sci_info *info; | |
2892 | ||
2893 | if (!dev) { | |
2894 | pr_err("I need a device pointer\n"); | |
2895 | return ERR_PTR(-EINVAL); | |
2896 | } | |
2897 | ti_sci_np = of_get_parent(dev->of_node); | |
2898 | if (!ti_sci_np) { | |
2899 | dev_err(dev, "No OF information\n"); | |
2900 | return ERR_PTR(-EINVAL); | |
2901 | } | |
2902 | ||
2903 | mutex_lock(&ti_sci_list_mutex); | |
2904 | list_for_each(p, &ti_sci_list) { | |
2905 | info = list_entry(p, struct ti_sci_info, node); | |
2906 | if (ti_sci_np == info->dev->of_node) { | |
2907 | handle = &info->handle; | |
2908 | info->users++; | |
2909 | break; | |
2910 | } | |
2911 | } | |
2912 | mutex_unlock(&ti_sci_list_mutex); | |
2913 | of_node_put(ti_sci_np); | |
2914 | ||
2915 | if (!handle) | |
2916 | return ERR_PTR(-EPROBE_DEFER); | |
2917 | ||
2918 | return handle; | |
2919 | } | |
2920 | EXPORT_SYMBOL_GPL(ti_sci_get_handle); | |
2921 | ||
2922 | /** | |
2923 | * ti_sci_put_handle() - Release the handle acquired by ti_sci_get_handle | |
2924 | * @handle: Handle acquired by ti_sci_get_handle | |
2925 | * | |
2926 | * NOTE: The function does not track individual clients of the framework | |
2927 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2928 | * ti_sci_put_handle must be balanced with successful ti_sci_get_handle | |
2929 | * | |
2930 | * Return: 0 is successfully released | |
2931 | * if an error pointer was passed, it returns the error value back, | |
2932 | * if null was passed, it returns -EINVAL; | |
2933 | */ | |
2934 | int ti_sci_put_handle(const struct ti_sci_handle *handle) | |
2935 | { | |
2936 | struct ti_sci_info *info; | |
2937 | ||
2938 | if (IS_ERR(handle)) | |
2939 | return PTR_ERR(handle); | |
2940 | if (!handle) | |
2941 | return -EINVAL; | |
2942 | ||
2943 | info = handle_to_ti_sci_info(handle); | |
2944 | mutex_lock(&ti_sci_list_mutex); | |
2945 | if (!WARN_ON(!info->users)) | |
2946 | info->users--; | |
2947 | mutex_unlock(&ti_sci_list_mutex); | |
2948 | ||
2949 | return 0; | |
2950 | } | |
2951 | EXPORT_SYMBOL_GPL(ti_sci_put_handle); | |
2952 | ||
2953 | static void devm_ti_sci_release(struct device *dev, void *res) | |
2954 | { | |
2955 | const struct ti_sci_handle **ptr = res; | |
2956 | const struct ti_sci_handle *handle = *ptr; | |
2957 | int ret; | |
2958 | ||
2959 | ret = ti_sci_put_handle(handle); | |
2960 | if (ret) | |
2961 | dev_err(dev, "failed to put handle %d\n", ret); | |
2962 | } | |
2963 | ||
2964 | /** | |
2965 | * devm_ti_sci_get_handle() - Managed get handle | |
2966 | * @dev: device for which we want SCI handle for. | |
2967 | * | |
2968 | * NOTE: This releases the handle once the device resources are | |
2969 | * no longer needed. MUST NOT BE released with ti_sci_put_handle. | |
2970 | * The function does not track individual clients of the framework | |
2971 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2972 | * | |
2973 | * Return: 0 if all went fine, else corresponding error. | |
2974 | */ | |
2975 | const struct ti_sci_handle *devm_ti_sci_get_handle(struct device *dev) | |
2976 | { | |
2977 | const struct ti_sci_handle **ptr; | |
2978 | const struct ti_sci_handle *handle; | |
2979 | ||
2980 | ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); | |
2981 | if (!ptr) | |
2982 | return ERR_PTR(-ENOMEM); | |
2983 | handle = ti_sci_get_handle(dev); | |
2984 | ||
2985 | if (!IS_ERR(handle)) { | |
2986 | *ptr = handle; | |
2987 | devres_add(dev, ptr); | |
2988 | } else { | |
2989 | devres_free(ptr); | |
2990 | } | |
2991 | ||
2992 | return handle; | |
2993 | } | |
2994 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_handle); | |
2995 | ||
905c3047 GS |
2996 | /** |
2997 | * ti_sci_get_by_phandle() - Get the TI SCI handle using DT phandle | |
2998 | * @np: device node | |
2999 | * @property: property name containing phandle on TISCI node | |
3000 | * | |
3001 | * NOTE: The function does not track individual clients of the framework | |
3002 | * and is expected to be maintained by caller of TI SCI protocol library. | |
3003 | * ti_sci_put_handle must be balanced with successful ti_sci_get_by_phandle | |
3004 | * Return: pointer to handle if successful, else: | |
3005 | * -EPROBE_DEFER if the instance is not ready | |
3006 | * -ENODEV if the required node handler is missing | |
3007 | * -EINVAL if invalid conditions are encountered. | |
3008 | */ | |
3009 | const struct ti_sci_handle *ti_sci_get_by_phandle(struct device_node *np, | |
3010 | const char *property) | |
3011 | { | |
3012 | struct ti_sci_handle *handle = NULL; | |
3013 | struct device_node *ti_sci_np; | |
3014 | struct ti_sci_info *info; | |
3015 | struct list_head *p; | |
3016 | ||
3017 | if (!np) { | |
3018 | pr_err("I need a device pointer\n"); | |
3019 | return ERR_PTR(-EINVAL); | |
3020 | } | |
3021 | ||
3022 | ti_sci_np = of_parse_phandle(np, property, 0); | |
3023 | if (!ti_sci_np) | |
3024 | return ERR_PTR(-ENODEV); | |
3025 | ||
3026 | mutex_lock(&ti_sci_list_mutex); | |
3027 | list_for_each(p, &ti_sci_list) { | |
3028 | info = list_entry(p, struct ti_sci_info, node); | |
3029 | if (ti_sci_np == info->dev->of_node) { | |
3030 | handle = &info->handle; | |
3031 | info->users++; | |
3032 | break; | |
3033 | } | |
3034 | } | |
3035 | mutex_unlock(&ti_sci_list_mutex); | |
3036 | of_node_put(ti_sci_np); | |
3037 | ||
3038 | if (!handle) | |
3039 | return ERR_PTR(-EPROBE_DEFER); | |
3040 | ||
3041 | return handle; | |
3042 | } | |
3043 | EXPORT_SYMBOL_GPL(ti_sci_get_by_phandle); | |
3044 | ||
3045 | /** | |
3046 | * devm_ti_sci_get_by_phandle() - Managed get handle using phandle | |
3047 | * @dev: Device pointer requesting TISCI handle | |
3048 | * @property: property name containing phandle on TISCI node | |
3049 | * | |
3050 | * NOTE: This releases the handle once the device resources are | |
3051 | * no longer needed. MUST NOT BE released with ti_sci_put_handle. | |
3052 | * The function does not track individual clients of the framework | |
3053 | * and is expected to be maintained by caller of TI SCI protocol library. | |
3054 | * | |
3055 | * Return: 0 if all went fine, else corresponding error. | |
3056 | */ | |
3057 | const struct ti_sci_handle *devm_ti_sci_get_by_phandle(struct device *dev, | |
3058 | const char *property) | |
3059 | { | |
3060 | const struct ti_sci_handle *handle; | |
3061 | const struct ti_sci_handle **ptr; | |
3062 | ||
3063 | ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); | |
3064 | if (!ptr) | |
3065 | return ERR_PTR(-ENOMEM); | |
3066 | handle = ti_sci_get_by_phandle(dev_of_node(dev), property); | |
3067 | ||
3068 | if (!IS_ERR(handle)) { | |
3069 | *ptr = handle; | |
3070 | devres_add(dev, ptr); | |
3071 | } else { | |
3072 | devres_free(ptr); | |
3073 | } | |
3074 | ||
3075 | return handle; | |
3076 | } | |
3077 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_by_phandle); | |
3078 | ||
032a1ec5 LV |
3079 | /** |
3080 | * ti_sci_get_free_resource() - Get a free resource from TISCI resource. | |
3081 | * @res: Pointer to the TISCI resource | |
3082 | * | |
3083 | * Return: resource num if all went ok else TI_SCI_RESOURCE_NULL. | |
3084 | */ | |
3085 | u16 ti_sci_get_free_resource(struct ti_sci_resource *res) | |
3086 | { | |
3087 | unsigned long flags; | |
3088 | u16 set, free_bit; | |
3089 | ||
3090 | raw_spin_lock_irqsave(&res->lock, flags); | |
3091 | for (set = 0; set < res->sets; set++) { | |
519c5c0c PU |
3092 | struct ti_sci_resource_desc *desc = &res->desc[set]; |
3093 | int res_count = desc->num + desc->num_sec; | |
3094 | ||
3095 | free_bit = find_first_zero_bit(desc->res_map, res_count); | |
3096 | if (free_bit != res_count) { | |
4dc38832 | 3097 | __set_bit(free_bit, desc->res_map); |
032a1ec5 | 3098 | raw_spin_unlock_irqrestore(&res->lock, flags); |
519c5c0c PU |
3099 | |
3100 | if (desc->num && free_bit < desc->num) | |
3101 | return desc->start + free_bit; | |
3102 | else | |
3103 | return desc->start_sec + free_bit; | |
032a1ec5 LV |
3104 | } |
3105 | } | |
3106 | raw_spin_unlock_irqrestore(&res->lock, flags); | |
3107 | ||
3108 | return TI_SCI_RESOURCE_NULL; | |
3109 | } | |
3110 | EXPORT_SYMBOL_GPL(ti_sci_get_free_resource); | |
3111 | ||
3112 | /** | |
3113 | * ti_sci_release_resource() - Release a resource from TISCI resource. | |
3114 | * @res: Pointer to the TISCI resource | |
3115 | * @id: Resource id to be released. | |
3116 | */ | |
3117 | void ti_sci_release_resource(struct ti_sci_resource *res, u16 id) | |
3118 | { | |
3119 | unsigned long flags; | |
3120 | u16 set; | |
3121 | ||
3122 | raw_spin_lock_irqsave(&res->lock, flags); | |
3123 | for (set = 0; set < res->sets; set++) { | |
519c5c0c PU |
3124 | struct ti_sci_resource_desc *desc = &res->desc[set]; |
3125 | ||
3126 | if (desc->num && desc->start <= id && | |
3127 | (desc->start + desc->num) > id) | |
4dc38832 | 3128 | __clear_bit(id - desc->start, desc->res_map); |
519c5c0c PU |
3129 | else if (desc->num_sec && desc->start_sec <= id && |
3130 | (desc->start_sec + desc->num_sec) > id) | |
4dc38832 | 3131 | __clear_bit(id - desc->start_sec, desc->res_map); |
032a1ec5 LV |
3132 | } |
3133 | raw_spin_unlock_irqrestore(&res->lock, flags); | |
3134 | } | |
3135 | EXPORT_SYMBOL_GPL(ti_sci_release_resource); | |
3136 | ||
3137 | /** | |
3138 | * ti_sci_get_num_resources() - Get the number of resources in TISCI resource | |
3139 | * @res: Pointer to the TISCI resource | |
3140 | * | |
3141 | * Return: Total number of available resources. | |
3142 | */ | |
3143 | u32 ti_sci_get_num_resources(struct ti_sci_resource *res) | |
3144 | { | |
3145 | u32 set, count = 0; | |
3146 | ||
3147 | for (set = 0; set < res->sets; set++) | |
519c5c0c | 3148 | count += res->desc[set].num + res->desc[set].num_sec; |
032a1ec5 LV |
3149 | |
3150 | return count; | |
3151 | } | |
3152 | EXPORT_SYMBOL_GPL(ti_sci_get_num_resources); | |
3153 | ||
3154 | /** | |
53bf2b0e | 3155 | * devm_ti_sci_get_resource_sets() - Get a TISCI resources assigned to a device |
032a1ec5 LV |
3156 | * @handle: TISCI handle |
3157 | * @dev: Device pointer to which the resource is assigned | |
3158 | * @dev_id: TISCI device id to which the resource is assigned | |
53bf2b0e LV |
3159 | * @sub_types: Array of sub_types assigned corresponding to device |
3160 | * @sets: Number of sub_types | |
032a1ec5 LV |
3161 | * |
3162 | * Return: Pointer to ti_sci_resource if all went well else appropriate | |
3163 | * error pointer. | |
3164 | */ | |
53bf2b0e LV |
3165 | static struct ti_sci_resource * |
3166 | devm_ti_sci_get_resource_sets(const struct ti_sci_handle *handle, | |
3167 | struct device *dev, u32 dev_id, u32 *sub_types, | |
3168 | u32 sets) | |
032a1ec5 LV |
3169 | { |
3170 | struct ti_sci_resource *res; | |
fa42da11 | 3171 | bool valid_set = false; |
519c5c0c | 3172 | int i, ret, res_count; |
032a1ec5 LV |
3173 | |
3174 | res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL); | |
3175 | if (!res) | |
3176 | return ERR_PTR(-ENOMEM); | |
3177 | ||
53bf2b0e | 3178 | res->sets = sets; |
032a1ec5 LV |
3179 | res->desc = devm_kcalloc(dev, res->sets, sizeof(*res->desc), |
3180 | GFP_KERNEL); | |
3181 | if (!res->desc) | |
3182 | return ERR_PTR(-ENOMEM); | |
3183 | ||
3184 | for (i = 0; i < res->sets; i++) { | |
032a1ec5 | 3185 | ret = handle->ops.rm_core_ops.get_range(handle, dev_id, |
53bf2b0e | 3186 | sub_types[i], |
967a020b | 3187 | &res->desc[i]); |
032a1ec5 | 3188 | if (ret) { |
fa42da11 | 3189 | dev_dbg(dev, "dev = %d subtype %d not allocated for this host\n", |
53bf2b0e | 3190 | dev_id, sub_types[i]); |
519c5c0c | 3191 | memset(&res->desc[i], 0, sizeof(res->desc[i])); |
fa42da11 | 3192 | continue; |
032a1ec5 LV |
3193 | } |
3194 | ||
519c5c0c | 3195 | dev_dbg(dev, "dev/sub_type: %d/%d, start/num: %d/%d | %d/%d\n", |
53bf2b0e | 3196 | dev_id, sub_types[i], res->desc[i].start, |
519c5c0c PU |
3197 | res->desc[i].num, res->desc[i].start_sec, |
3198 | res->desc[i].num_sec); | |
032a1ec5 | 3199 | |
fa42da11 | 3200 | valid_set = true; |
519c5c0c | 3201 | res_count = res->desc[i].num + res->desc[i].num_sec; |
2f9b0402 CJ |
3202 | res->desc[i].res_map = devm_bitmap_zalloc(dev, res_count, |
3203 | GFP_KERNEL); | |
032a1ec5 LV |
3204 | if (!res->desc[i].res_map) |
3205 | return ERR_PTR(-ENOMEM); | |
3206 | } | |
3207 | raw_spin_lock_init(&res->lock); | |
3208 | ||
fa42da11 PU |
3209 | if (valid_set) |
3210 | return res; | |
3211 | ||
3212 | return ERR_PTR(-EINVAL); | |
032a1ec5 LV |
3213 | } |
3214 | ||
53bf2b0e LV |
3215 | /** |
3216 | * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device | |
3217 | * @handle: TISCI handle | |
3218 | * @dev: Device pointer to which the resource is assigned | |
3219 | * @dev_id: TISCI device id to which the resource is assigned | |
3220 | * @of_prop: property name by which the resource are represented | |
3221 | * | |
3222 | * Return: Pointer to ti_sci_resource if all went well else appropriate | |
3223 | * error pointer. | |
3224 | */ | |
3225 | struct ti_sci_resource * | |
3226 | devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle, | |
3227 | struct device *dev, u32 dev_id, char *of_prop) | |
3228 | { | |
3229 | struct ti_sci_resource *res; | |
3230 | u32 *sub_types; | |
3231 | int sets; | |
3232 | ||
3233 | sets = of_property_count_elems_of_size(dev_of_node(dev), of_prop, | |
3234 | sizeof(u32)); | |
3235 | if (sets < 0) { | |
3236 | dev_err(dev, "%s resource type ids not available\n", of_prop); | |
3237 | return ERR_PTR(sets); | |
3238 | } | |
3239 | ||
3240 | sub_types = kcalloc(sets, sizeof(*sub_types), GFP_KERNEL); | |
3241 | if (!sub_types) | |
3242 | return ERR_PTR(-ENOMEM); | |
3243 | ||
3244 | of_property_read_u32_array(dev_of_node(dev), of_prop, sub_types, sets); | |
3245 | res = devm_ti_sci_get_resource_sets(handle, dev, dev_id, sub_types, | |
3246 | sets); | |
3247 | ||
3248 | kfree(sub_types); | |
3249 | return res; | |
3250 | } | |
3251 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_of_resource); | |
3252 | ||
3253 | /** | |
3254 | * devm_ti_sci_get_resource() - Get a resource range assigned to the device | |
3255 | * @handle: TISCI handle | |
3256 | * @dev: Device pointer to which the resource is assigned | |
3257 | * @dev_id: TISCI device id to which the resource is assigned | |
3e67fd8d | 3258 | * @sub_type: TISCI resource subytpe representing the resource. |
53bf2b0e LV |
3259 | * |
3260 | * Return: Pointer to ti_sci_resource if all went well else appropriate | |
3261 | * error pointer. | |
3262 | */ | |
3263 | struct ti_sci_resource * | |
3264 | devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev, | |
3265 | u32 dev_id, u32 sub_type) | |
3266 | { | |
3267 | return devm_ti_sci_get_resource_sets(handle, dev, dev_id, &sub_type, 1); | |
3268 | } | |
3269 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_resource); | |
3270 | ||
912cffb4 NM |
3271 | static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode, |
3272 | void *cmd) | |
3273 | { | |
3274 | struct ti_sci_info *info = reboot_to_ti_sci_info(nb); | |
3275 | const struct ti_sci_handle *handle = &info->handle; | |
3276 | ||
3277 | ti_sci_cmd_core_reboot(handle); | |
3278 | ||
3279 | /* call fail OR pass, we should not be here in the first place */ | |
3280 | return NOTIFY_BAD; | |
3281 | } | |
3282 | ||
aa276781 NM |
3283 | /* Description for K2G */ |
3284 | static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = { | |
e69a3553 | 3285 | .default_host_id = 2, |
aa276781 NM |
3286 | /* Conservative duration */ |
3287 | .max_rx_timeout_ms = 1000, | |
3288 | /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ | |
3289 | .max_msgs = 20, | |
3290 | .max_msg_size = 64, | |
754c9477 PU |
3291 | }; |
3292 | ||
754c9477 PU |
3293 | /* Description for AM654 */ |
3294 | static const struct ti_sci_desc ti_sci_pmmc_am654_desc = { | |
3295 | .default_host_id = 12, | |
3296 | /* Conservative duration */ | |
3297 | .max_rx_timeout_ms = 10000, | |
3298 | /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ | |
3299 | .max_msgs = 20, | |
3300 | .max_msg_size = 60, | |
aa276781 NM |
3301 | }; |
3302 | ||
3303 | static const struct of_device_id ti_sci_of_match[] = { | |
3304 | {.compatible = "ti,k2g-sci", .data = &ti_sci_pmmc_k2g_desc}, | |
754c9477 | 3305 | {.compatible = "ti,am654-sci", .data = &ti_sci_pmmc_am654_desc}, |
aa276781 NM |
3306 | { /* Sentinel */ }, |
3307 | }; | |
3308 | MODULE_DEVICE_TABLE(of, ti_sci_of_match); | |
3309 | ||
3310 | static int ti_sci_probe(struct platform_device *pdev) | |
3311 | { | |
3312 | struct device *dev = &pdev->dev; | |
3313 | const struct of_device_id *of_id; | |
3314 | const struct ti_sci_desc *desc; | |
3315 | struct ti_sci_xfer *xfer; | |
3316 | struct ti_sci_info *info = NULL; | |
3317 | struct ti_sci_xfers_info *minfo; | |
3318 | struct mbox_client *cl; | |
3319 | int ret = -EINVAL; | |
3320 | int i; | |
912cffb4 | 3321 | int reboot = 0; |
e69a3553 | 3322 | u32 h_id; |
aa276781 NM |
3323 | |
3324 | of_id = of_match_device(ti_sci_of_match, dev); | |
3325 | if (!of_id) { | |
3326 | dev_err(dev, "OF data missing\n"); | |
3327 | return -EINVAL; | |
3328 | } | |
3329 | desc = of_id->data; | |
3330 | ||
3331 | info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); | |
3332 | if (!info) | |
3333 | return -ENOMEM; | |
3334 | ||
3335 | info->dev = dev; | |
3336 | info->desc = desc; | |
e69a3553 NM |
3337 | ret = of_property_read_u32(dev->of_node, "ti,host-id", &h_id); |
3338 | /* if the property is not present in DT, use a default from desc */ | |
3339 | if (ret < 0) { | |
3340 | info->host_id = info->desc->default_host_id; | |
3341 | } else { | |
3342 | if (!h_id) { | |
3343 | dev_warn(dev, "Host ID 0 is reserved for firmware\n"); | |
3344 | info->host_id = info->desc->default_host_id; | |
3345 | } else { | |
3346 | info->host_id = h_id; | |
3347 | } | |
3348 | } | |
3349 | ||
912cffb4 NM |
3350 | reboot = of_property_read_bool(dev->of_node, |
3351 | "ti,system-reboot-controller"); | |
aa276781 NM |
3352 | INIT_LIST_HEAD(&info->node); |
3353 | minfo = &info->minfo; | |
3354 | ||
3355 | /* | |
3356 | * Pre-allocate messages | |
3357 | * NEVER allocate more than what we can indicate in hdr.seq | |
3358 | * if we have data description bug, force a fix.. | |
3359 | */ | |
3360 | if (WARN_ON(desc->max_msgs >= | |
3361 | 1 << 8 * sizeof(((struct ti_sci_msg_hdr *)0)->seq))) | |
3362 | return -EINVAL; | |
3363 | ||
3364 | minfo->xfer_block = devm_kcalloc(dev, | |
3365 | desc->max_msgs, | |
3366 | sizeof(*minfo->xfer_block), | |
3367 | GFP_KERNEL); | |
3368 | if (!minfo->xfer_block) | |
3369 | return -ENOMEM; | |
3370 | ||
26507b03 CJ |
3371 | minfo->xfer_alloc_table = devm_bitmap_zalloc(dev, |
3372 | desc->max_msgs, | |
3373 | GFP_KERNEL); | |
aa276781 NM |
3374 | if (!minfo->xfer_alloc_table) |
3375 | return -ENOMEM; | |
aa276781 NM |
3376 | |
3377 | /* Pre-initialize the buffer pointer to pre-allocated buffers */ | |
3378 | for (i = 0, xfer = minfo->xfer_block; i < desc->max_msgs; i++, xfer++) { | |
3379 | xfer->xfer_buf = devm_kcalloc(dev, 1, desc->max_msg_size, | |
3380 | GFP_KERNEL); | |
3381 | if (!xfer->xfer_buf) | |
3382 | return -ENOMEM; | |
3383 | ||
3384 | xfer->tx_message.buf = xfer->xfer_buf; | |
3385 | init_completion(&xfer->done); | |
3386 | } | |
3387 | ||
3388 | ret = ti_sci_debugfs_create(pdev, info); | |
3389 | if (ret) | |
3390 | dev_warn(dev, "Failed to create debug file\n"); | |
3391 | ||
3392 | platform_set_drvdata(pdev, info); | |
3393 | ||
3394 | cl = &info->cl; | |
3395 | cl->dev = dev; | |
3396 | cl->tx_block = false; | |
3397 | cl->rx_callback = ti_sci_rx_callback; | |
3398 | cl->knows_txdone = true; | |
3399 | ||
3400 | spin_lock_init(&minfo->xfer_lock); | |
3401 | sema_init(&minfo->sem_xfer_count, desc->max_msgs); | |
3402 | ||
3403 | info->chan_rx = mbox_request_channel_byname(cl, "rx"); | |
3404 | if (IS_ERR(info->chan_rx)) { | |
3405 | ret = PTR_ERR(info->chan_rx); | |
3406 | goto out; | |
3407 | } | |
3408 | ||
3409 | info->chan_tx = mbox_request_channel_byname(cl, "tx"); | |
3410 | if (IS_ERR(info->chan_tx)) { | |
3411 | ret = PTR_ERR(info->chan_tx); | |
3412 | goto out; | |
3413 | } | |
3414 | ret = ti_sci_cmd_get_revision(info); | |
3415 | if (ret) { | |
3416 | dev_err(dev, "Unable to communicate with TISCI(%d)\n", ret); | |
3417 | goto out; | |
3418 | } | |
3419 | ||
9e7d756d NM |
3420 | ti_sci_setup_ops(info); |
3421 | ||
912cffb4 NM |
3422 | if (reboot) { |
3423 | info->nb.notifier_call = tisci_reboot_handler; | |
3424 | info->nb.priority = 128; | |
3425 | ||
3426 | ret = register_restart_handler(&info->nb); | |
3427 | if (ret) { | |
3428 | dev_err(dev, "reboot registration fail(%d)\n", ret); | |
a181bcfc | 3429 | goto out; |
912cffb4 NM |
3430 | } |
3431 | } | |
3432 | ||
aa276781 NM |
3433 | dev_info(dev, "ABI: %d.%d (firmware rev 0x%04x '%s')\n", |
3434 | info->handle.version.abi_major, info->handle.version.abi_minor, | |
3435 | info->handle.version.firmware_revision, | |
3436 | info->handle.version.firmware_description); | |
3437 | ||
3438 | mutex_lock(&ti_sci_list_mutex); | |
3439 | list_add_tail(&info->node, &ti_sci_list); | |
3440 | mutex_unlock(&ti_sci_list_mutex); | |
3441 | ||
3442 | return of_platform_populate(dev->of_node, NULL, NULL, dev); | |
3443 | out: | |
3444 | if (!IS_ERR(info->chan_tx)) | |
3445 | mbox_free_channel(info->chan_tx); | |
3446 | if (!IS_ERR(info->chan_rx)) | |
3447 | mbox_free_channel(info->chan_rx); | |
3448 | debugfs_remove(info->d); | |
3449 | return ret; | |
3450 | } | |
3451 | ||
3452 | static int ti_sci_remove(struct platform_device *pdev) | |
3453 | { | |
3454 | struct ti_sci_info *info; | |
3455 | struct device *dev = &pdev->dev; | |
3456 | int ret = 0; | |
3457 | ||
3458 | of_platform_depopulate(dev); | |
3459 | ||
3460 | info = platform_get_drvdata(pdev); | |
3461 | ||
912cffb4 NM |
3462 | if (info->nb.notifier_call) |
3463 | unregister_restart_handler(&info->nb); | |
3464 | ||
aa276781 NM |
3465 | mutex_lock(&ti_sci_list_mutex); |
3466 | if (info->users) | |
3467 | ret = -EBUSY; | |
3468 | else | |
3469 | list_del(&info->node); | |
3470 | mutex_unlock(&ti_sci_list_mutex); | |
3471 | ||
3472 | if (!ret) { | |
3473 | ti_sci_debugfs_destroy(pdev, info); | |
3474 | ||
3475 | /* Safe to free channels since no more users */ | |
3476 | mbox_free_channel(info->chan_tx); | |
3477 | mbox_free_channel(info->chan_rx); | |
3478 | } | |
3479 | ||
3480 | return ret; | |
3481 | } | |
3482 | ||
3483 | static struct platform_driver ti_sci_driver = { | |
3484 | .probe = ti_sci_probe, | |
3485 | .remove = ti_sci_remove, | |
3486 | .driver = { | |
3487 | .name = "ti-sci", | |
3488 | .of_match_table = of_match_ptr(ti_sci_of_match), | |
3489 | }, | |
3490 | }; | |
3491 | module_platform_driver(ti_sci_driver); | |
3492 | ||
3493 | MODULE_LICENSE("GPL v2"); | |
3494 | MODULE_DESCRIPTION("TI System Control Interface(SCI) driver"); | |
3495 | MODULE_AUTHOR("Nishanth Menon"); | |
3496 | MODULE_ALIAS("platform:ti-sci"); |