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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 | 99 | * @users: Number of users of this instance |
b9e8a7d9 | 100 | * @is_suspending: Flag set to indicate in suspend path. |
aa276781 NM |
101 | */ |
102 | struct ti_sci_info { | |
103 | struct device *dev; | |
912cffb4 | 104 | struct notifier_block nb; |
aa276781 NM |
105 | const struct ti_sci_desc *desc; |
106 | struct dentry *d; | |
107 | void __iomem *debug_region; | |
108 | char *debug_buffer; | |
109 | size_t debug_region_size; | |
110 | struct ti_sci_handle handle; | |
111 | struct mbox_client cl; | |
112 | struct mbox_chan *chan_tx; | |
113 | struct mbox_chan *chan_rx; | |
114 | struct ti_sci_xfers_info minfo; | |
115 | struct list_head node; | |
e69a3553 | 116 | u8 host_id; |
aa276781 NM |
117 | /* protected by ti_sci_list_mutex */ |
118 | int users; | |
b9e8a7d9 | 119 | bool is_suspending; |
aa276781 NM |
120 | }; |
121 | ||
122 | #define cl_to_ti_sci_info(c) container_of(c, struct ti_sci_info, cl) | |
123 | #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle) | |
912cffb4 | 124 | #define reboot_to_ti_sci_info(n) container_of(n, struct ti_sci_info, nb) |
aa276781 NM |
125 | |
126 | #ifdef CONFIG_DEBUG_FS | |
127 | ||
128 | /** | |
129 | * ti_sci_debug_show() - Helper to dump the debug log | |
130 | * @s: sequence file pointer | |
131 | * @unused: unused. | |
132 | * | |
133 | * Return: 0 | |
134 | */ | |
135 | static int ti_sci_debug_show(struct seq_file *s, void *unused) | |
136 | { | |
137 | struct ti_sci_info *info = s->private; | |
138 | ||
139 | memcpy_fromio(info->debug_buffer, info->debug_region, | |
140 | info->debug_region_size); | |
141 | /* | |
142 | * We don't trust firmware to leave NULL terminated last byte (hence | |
143 | * we have allocated 1 extra 0 byte). Since we cannot guarantee any | |
144 | * specific data format for debug messages, We just present the data | |
145 | * in the buffer as is - we expect the messages to be self explanatory. | |
146 | */ | |
147 | seq_puts(s, info->debug_buffer); | |
148 | return 0; | |
149 | } | |
150 | ||
5953c887 YL |
151 | /* Provide the log file operations interface*/ |
152 | DEFINE_SHOW_ATTRIBUTE(ti_sci_debug); | |
aa276781 NM |
153 | |
154 | /** | |
155 | * ti_sci_debugfs_create() - Create log debug file | |
156 | * @pdev: platform device pointer | |
157 | * @info: Pointer to SCI entity information | |
158 | * | |
159 | * Return: 0 if all went fine, else corresponding error. | |
160 | */ | |
161 | static int ti_sci_debugfs_create(struct platform_device *pdev, | |
162 | struct ti_sci_info *info) | |
163 | { | |
164 | struct device *dev = &pdev->dev; | |
165 | struct resource *res; | |
166 | char debug_name[50] = "ti_sci_debug@"; | |
167 | ||
168 | /* Debug region is optional */ | |
169 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, | |
170 | "debug_messages"); | |
171 | info->debug_region = devm_ioremap_resource(dev, res); | |
172 | if (IS_ERR(info->debug_region)) | |
173 | return 0; | |
174 | info->debug_region_size = resource_size(res); | |
175 | ||
176 | info->debug_buffer = devm_kcalloc(dev, info->debug_region_size + 1, | |
177 | sizeof(char), GFP_KERNEL); | |
178 | if (!info->debug_buffer) | |
179 | return -ENOMEM; | |
180 | /* Setup NULL termination */ | |
181 | info->debug_buffer[info->debug_region_size] = 0; | |
182 | ||
183 | info->d = debugfs_create_file(strncat(debug_name, dev_name(dev), | |
76cefef8 AB |
184 | sizeof(debug_name) - |
185 | sizeof("ti_sci_debug@")), | |
aa276781 NM |
186 | 0444, NULL, info, &ti_sci_debug_fops); |
187 | if (IS_ERR(info->d)) | |
188 | return PTR_ERR(info->d); | |
189 | ||
190 | dev_dbg(dev, "Debug region => %p, size = %zu bytes, resource: %pr\n", | |
191 | info->debug_region, info->debug_region_size, res); | |
192 | return 0; | |
193 | } | |
194 | ||
195 | /** | |
196 | * ti_sci_debugfs_destroy() - clean up log debug file | |
197 | * @pdev: platform device pointer | |
198 | * @info: Pointer to SCI entity information | |
199 | */ | |
200 | static void ti_sci_debugfs_destroy(struct platform_device *pdev, | |
201 | struct ti_sci_info *info) | |
202 | { | |
203 | if (IS_ERR(info->debug_region)) | |
204 | return; | |
205 | ||
206 | debugfs_remove(info->d); | |
207 | } | |
208 | #else /* CONFIG_DEBUG_FS */ | |
209 | static inline int ti_sci_debugfs_create(struct platform_device *dev, | |
210 | struct ti_sci_info *info) | |
211 | { | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static inline void ti_sci_debugfs_destroy(struct platform_device *dev, | |
216 | struct ti_sci_info *info) | |
217 | { | |
218 | } | |
219 | #endif /* CONFIG_DEBUG_FS */ | |
220 | ||
221 | /** | |
222 | * ti_sci_dump_header_dbg() - Helper to dump a message header. | |
223 | * @dev: Device pointer corresponding to the SCI entity | |
224 | * @hdr: pointer to header. | |
225 | */ | |
226 | static inline void ti_sci_dump_header_dbg(struct device *dev, | |
227 | struct ti_sci_msg_hdr *hdr) | |
228 | { | |
229 | dev_dbg(dev, "MSGHDR:type=0x%04x host=0x%02x seq=0x%02x flags=0x%08x\n", | |
230 | hdr->type, hdr->host, hdr->seq, hdr->flags); | |
231 | } | |
232 | ||
233 | /** | |
234 | * ti_sci_rx_callback() - mailbox client callback for receive messages | |
235 | * @cl: client pointer | |
236 | * @m: mailbox message | |
237 | * | |
238 | * Processes one received message to appropriate transfer information and | |
239 | * signals completion of the transfer. | |
240 | * | |
241 | * NOTE: This function will be invoked in IRQ context, hence should be | |
242 | * as optimal as possible. | |
243 | */ | |
244 | static void ti_sci_rx_callback(struct mbox_client *cl, void *m) | |
245 | { | |
246 | struct ti_sci_info *info = cl_to_ti_sci_info(cl); | |
247 | struct device *dev = info->dev; | |
248 | struct ti_sci_xfers_info *minfo = &info->minfo; | |
249 | struct ti_msgmgr_message *mbox_msg = m; | |
250 | struct ti_sci_msg_hdr *hdr = (struct ti_sci_msg_hdr *)mbox_msg->buf; | |
251 | struct ti_sci_xfer *xfer; | |
252 | u8 xfer_id; | |
253 | ||
254 | xfer_id = hdr->seq; | |
255 | ||
256 | /* | |
257 | * Are we even expecting this? | |
258 | * NOTE: barriers were implicit in locks used for modifying the bitmap | |
259 | */ | |
260 | if (!test_bit(xfer_id, minfo->xfer_alloc_table)) { | |
261 | dev_err(dev, "Message for %d is not expected!\n", xfer_id); | |
262 | return; | |
263 | } | |
264 | ||
265 | xfer = &minfo->xfer_block[xfer_id]; | |
266 | ||
267 | /* Is the message of valid length? */ | |
268 | if (mbox_msg->len > info->desc->max_msg_size) { | |
bd0fa74e | 269 | dev_err(dev, "Unable to handle %zu xfer(max %d)\n", |
aa276781 NM |
270 | mbox_msg->len, info->desc->max_msg_size); |
271 | ti_sci_dump_header_dbg(dev, hdr); | |
272 | return; | |
273 | } | |
274 | if (mbox_msg->len < xfer->rx_len) { | |
bd0fa74e | 275 | dev_err(dev, "Recv xfer %zu < expected %d length\n", |
aa276781 NM |
276 | mbox_msg->len, xfer->rx_len); |
277 | ti_sci_dump_header_dbg(dev, hdr); | |
278 | return; | |
279 | } | |
280 | ||
281 | ti_sci_dump_header_dbg(dev, hdr); | |
282 | /* Take a copy to the rx buffer.. */ | |
283 | memcpy(xfer->xfer_buf, mbox_msg->buf, xfer->rx_len); | |
284 | complete(&xfer->done); | |
285 | } | |
286 | ||
287 | /** | |
288 | * ti_sci_get_one_xfer() - Allocate one message | |
289 | * @info: Pointer to SCI entity information | |
290 | * @msg_type: Message type | |
291 | * @msg_flags: Flag to set for the message | |
292 | * @tx_message_size: transmit message size | |
293 | * @rx_message_size: receive message size | |
294 | * | |
295 | * Helper function which is used by various command functions that are | |
296 | * exposed to clients of this driver for allocating a message traffic event. | |
297 | * | |
298 | * This function can sleep depending on pending requests already in the system | |
299 | * for the SCI entity. Further, this also holds a spinlock to maintain integrity | |
300 | * of internal data structures. | |
301 | * | |
302 | * Return: 0 if all went fine, else corresponding error. | |
303 | */ | |
304 | static struct ti_sci_xfer *ti_sci_get_one_xfer(struct ti_sci_info *info, | |
305 | u16 msg_type, u32 msg_flags, | |
306 | size_t tx_message_size, | |
307 | size_t rx_message_size) | |
308 | { | |
309 | struct ti_sci_xfers_info *minfo = &info->minfo; | |
310 | struct ti_sci_xfer *xfer; | |
311 | struct ti_sci_msg_hdr *hdr; | |
312 | unsigned long flags; | |
313 | unsigned long bit_pos; | |
314 | u8 xfer_id; | |
315 | int ret; | |
316 | int timeout; | |
317 | ||
318 | /* Ensure we have sane transfer sizes */ | |
319 | if (rx_message_size > info->desc->max_msg_size || | |
320 | tx_message_size > info->desc->max_msg_size || | |
321 | rx_message_size < sizeof(*hdr) || tx_message_size < sizeof(*hdr)) | |
322 | return ERR_PTR(-ERANGE); | |
323 | ||
324 | /* | |
325 | * Ensure we have only controlled number of pending messages. | |
326 | * Ideally, we might just have to wait a single message, be | |
327 | * conservative and wait 5 times that.. | |
328 | */ | |
329 | timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms) * 5; | |
330 | ret = down_timeout(&minfo->sem_xfer_count, timeout); | |
331 | if (ret < 0) | |
332 | return ERR_PTR(ret); | |
333 | ||
334 | /* Keep the locked section as small as possible */ | |
335 | spin_lock_irqsave(&minfo->xfer_lock, flags); | |
336 | bit_pos = find_first_zero_bit(minfo->xfer_alloc_table, | |
337 | info->desc->max_msgs); | |
338 | set_bit(bit_pos, minfo->xfer_alloc_table); | |
339 | spin_unlock_irqrestore(&minfo->xfer_lock, flags); | |
340 | ||
341 | /* | |
342 | * We already ensured in probe that we can have max messages that can | |
343 | * fit in hdr.seq - NOTE: this improves access latencies | |
344 | * to predictable O(1) access, BUT, it opens us to risk if | |
345 | * remote misbehaves with corrupted message sequence responses. | |
346 | * If that happens, we are going to be messed up anyways.. | |
347 | */ | |
348 | xfer_id = (u8)bit_pos; | |
349 | ||
350 | xfer = &minfo->xfer_block[xfer_id]; | |
351 | ||
352 | hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
353 | xfer->tx_message.len = tx_message_size; | |
b9e8a7d9 DG |
354 | xfer->tx_message.chan_rx = info->chan_rx; |
355 | xfer->tx_message.timeout_rx_ms = info->desc->max_rx_timeout_ms; | |
aa276781 NM |
356 | xfer->rx_len = (u8)rx_message_size; |
357 | ||
358 | reinit_completion(&xfer->done); | |
359 | ||
360 | hdr->seq = xfer_id; | |
361 | hdr->type = msg_type; | |
e69a3553 | 362 | hdr->host = info->host_id; |
aa276781 NM |
363 | hdr->flags = msg_flags; |
364 | ||
365 | return xfer; | |
366 | } | |
367 | ||
368 | /** | |
369 | * ti_sci_put_one_xfer() - Release a message | |
370 | * @minfo: transfer info pointer | |
371 | * @xfer: message that was reserved by ti_sci_get_one_xfer | |
372 | * | |
373 | * This holds a spinlock to maintain integrity of internal data structures. | |
374 | */ | |
375 | static void ti_sci_put_one_xfer(struct ti_sci_xfers_info *minfo, | |
376 | struct ti_sci_xfer *xfer) | |
377 | { | |
378 | unsigned long flags; | |
379 | struct ti_sci_msg_hdr *hdr; | |
380 | u8 xfer_id; | |
381 | ||
382 | hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
383 | xfer_id = hdr->seq; | |
384 | ||
385 | /* | |
386 | * Keep the locked section as small as possible | |
387 | * NOTE: we might escape with smp_mb and no lock here.. | |
388 | * but just be conservative and symmetric. | |
389 | */ | |
390 | spin_lock_irqsave(&minfo->xfer_lock, flags); | |
391 | clear_bit(xfer_id, minfo->xfer_alloc_table); | |
392 | spin_unlock_irqrestore(&minfo->xfer_lock, flags); | |
393 | ||
394 | /* Increment the count for the next user to get through */ | |
395 | up(&minfo->sem_xfer_count); | |
396 | } | |
397 | ||
398 | /** | |
399 | * ti_sci_do_xfer() - Do one transfer | |
400 | * @info: Pointer to SCI entity information | |
401 | * @xfer: Transfer to initiate and wait for response | |
402 | * | |
403 | * Return: -ETIMEDOUT in case of no response, if transmit error, | |
404 | * return corresponding error, else if all goes well, | |
405 | * return 0. | |
406 | */ | |
407 | static inline int ti_sci_do_xfer(struct ti_sci_info *info, | |
408 | struct ti_sci_xfer *xfer) | |
409 | { | |
410 | int ret; | |
411 | int timeout; | |
412 | struct device *dev = info->dev; | |
b9e8a7d9 | 413 | bool done_state = true; |
aa276781 NM |
414 | |
415 | ret = mbox_send_message(info->chan_tx, &xfer->tx_message); | |
416 | if (ret < 0) | |
417 | return ret; | |
418 | ||
419 | ret = 0; | |
420 | ||
b9e8a7d9 DG |
421 | if (!info->is_suspending) { |
422 | /* And we wait for the response. */ | |
423 | timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms); | |
424 | if (!wait_for_completion_timeout(&xfer->done, timeout)) | |
425 | ret = -ETIMEDOUT; | |
426 | } else { | |
427 | /* | |
428 | * If we are suspending, we cannot use wait_for_completion_timeout | |
429 | * during noirq phase, so we must manually poll the completion. | |
430 | */ | |
431 | ret = read_poll_timeout_atomic(try_wait_for_completion, done_state, | |
432 | true, 1, | |
433 | info->desc->max_rx_timeout_ms * 1000, | |
434 | false, &xfer->done); | |
435 | } | |
436 | ||
437 | if (ret == -ETIMEDOUT || !done_state) { | |
595f3a9d | 438 | dev_err(dev, "Mbox timedout in resp(caller: %pS)\n", |
aa276781 | 439 | (void *)_RET_IP_); |
aa276781 | 440 | } |
b9e8a7d9 | 441 | |
aa276781 NM |
442 | /* |
443 | * NOTE: we might prefer not to need the mailbox ticker to manage the | |
444 | * transfer queueing since the protocol layer queues things by itself. | |
445 | * Unfortunately, we have to kick the mailbox framework after we have | |
446 | * received our message. | |
447 | */ | |
448 | mbox_client_txdone(info->chan_tx, ret); | |
449 | ||
450 | return ret; | |
451 | } | |
452 | ||
453 | /** | |
454 | * ti_sci_cmd_get_revision() - command to get the revision of the SCI entity | |
455 | * @info: Pointer to SCI entity information | |
456 | * | |
457 | * Updates the SCI information in the internal data structure. | |
458 | * | |
459 | * Return: 0 if all went fine, else return appropriate error. | |
460 | */ | |
461 | static int ti_sci_cmd_get_revision(struct ti_sci_info *info) | |
462 | { | |
463 | struct device *dev = info->dev; | |
464 | struct ti_sci_handle *handle = &info->handle; | |
465 | struct ti_sci_version_info *ver = &handle->version; | |
466 | struct ti_sci_msg_resp_version *rev_info; | |
467 | struct ti_sci_xfer *xfer; | |
468 | int ret; | |
469 | ||
aa276781 | 470 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_VERSION, |
66f030ea AD |
471 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, |
472 | sizeof(struct ti_sci_msg_hdr), | |
aa276781 NM |
473 | sizeof(*rev_info)); |
474 | if (IS_ERR(xfer)) { | |
475 | ret = PTR_ERR(xfer); | |
476 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
477 | return ret; | |
478 | } | |
479 | ||
480 | rev_info = (struct ti_sci_msg_resp_version *)xfer->xfer_buf; | |
481 | ||
482 | ret = ti_sci_do_xfer(info, xfer); | |
483 | if (ret) { | |
484 | dev_err(dev, "Mbox send fail %d\n", ret); | |
485 | goto fail; | |
486 | } | |
487 | ||
488 | ver->abi_major = rev_info->abi_major; | |
489 | ver->abi_minor = rev_info->abi_minor; | |
490 | ver->firmware_revision = rev_info->firmware_revision; | |
491 | strncpy(ver->firmware_description, rev_info->firmware_description, | |
492 | sizeof(ver->firmware_description)); | |
493 | ||
494 | fail: | |
495 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
496 | return ret; | |
497 | } | |
498 | ||
9e7d756d NM |
499 | /** |
500 | * ti_sci_is_response_ack() - Generic ACK/NACK message checkup | |
501 | * @r: pointer to response buffer | |
502 | * | |
503 | * Return: true if the response was an ACK, else returns false. | |
504 | */ | |
505 | static inline bool ti_sci_is_response_ack(void *r) | |
506 | { | |
507 | struct ti_sci_msg_hdr *hdr = r; | |
508 | ||
509 | return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false; | |
510 | } | |
511 | ||
512 | /** | |
513 | * ti_sci_set_device_state() - Set device state helper | |
514 | * @handle: pointer to TI SCI handle | |
515 | * @id: Device identifier | |
516 | * @flags: flags to setup for the device | |
517 | * @state: State to move the device to | |
518 | * | |
519 | * Return: 0 if all went well, else returns appropriate error value. | |
520 | */ | |
521 | static int ti_sci_set_device_state(const struct ti_sci_handle *handle, | |
522 | u32 id, u32 flags, u8 state) | |
523 | { | |
524 | struct ti_sci_info *info; | |
525 | struct ti_sci_msg_req_set_device_state *req; | |
526 | struct ti_sci_msg_hdr *resp; | |
527 | struct ti_sci_xfer *xfer; | |
528 | struct device *dev; | |
529 | int ret = 0; | |
530 | ||
531 | if (IS_ERR(handle)) | |
532 | return PTR_ERR(handle); | |
533 | if (!handle) | |
534 | return -EINVAL; | |
535 | ||
536 | info = handle_to_ti_sci_info(handle); | |
537 | dev = info->dev; | |
538 | ||
539 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_DEVICE_STATE, | |
540 | flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
541 | sizeof(*req), sizeof(*resp)); | |
542 | if (IS_ERR(xfer)) { | |
543 | ret = PTR_ERR(xfer); | |
544 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
545 | return ret; | |
546 | } | |
547 | req = (struct ti_sci_msg_req_set_device_state *)xfer->xfer_buf; | |
548 | req->id = id; | |
549 | req->state = state; | |
550 | ||
551 | ret = ti_sci_do_xfer(info, xfer); | |
552 | if (ret) { | |
553 | dev_err(dev, "Mbox send fail %d\n", ret); | |
554 | goto fail; | |
555 | } | |
556 | ||
557 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
558 | ||
559 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
560 | ||
561 | fail: | |
562 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
563 | ||
564 | return ret; | |
565 | } | |
566 | ||
567 | /** | |
568 | * ti_sci_get_device_state() - Get device state helper | |
569 | * @handle: Handle to the device | |
570 | * @id: Device Identifier | |
571 | * @clcnt: Pointer to Context Loss Count | |
572 | * @resets: pointer to resets | |
573 | * @p_state: pointer to p_state | |
574 | * @c_state: pointer to c_state | |
575 | * | |
576 | * Return: 0 if all went fine, else return appropriate error. | |
577 | */ | |
578 | static int ti_sci_get_device_state(const struct ti_sci_handle *handle, | |
579 | u32 id, u32 *clcnt, u32 *resets, | |
580 | u8 *p_state, u8 *c_state) | |
581 | { | |
582 | struct ti_sci_info *info; | |
583 | struct ti_sci_msg_req_get_device_state *req; | |
584 | struct ti_sci_msg_resp_get_device_state *resp; | |
585 | struct ti_sci_xfer *xfer; | |
586 | struct device *dev; | |
587 | int ret = 0; | |
588 | ||
589 | if (IS_ERR(handle)) | |
590 | return PTR_ERR(handle); | |
591 | if (!handle) | |
592 | return -EINVAL; | |
593 | ||
594 | if (!clcnt && !resets && !p_state && !c_state) | |
595 | return -EINVAL; | |
596 | ||
597 | info = handle_to_ti_sci_info(handle); | |
598 | dev = info->dev; | |
599 | ||
9e7d756d | 600 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_DEVICE_STATE, |
66f030ea AD |
601 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, |
602 | sizeof(*req), sizeof(*resp)); | |
9e7d756d NM |
603 | if (IS_ERR(xfer)) { |
604 | ret = PTR_ERR(xfer); | |
605 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
606 | return ret; | |
607 | } | |
608 | req = (struct ti_sci_msg_req_get_device_state *)xfer->xfer_buf; | |
609 | req->id = id; | |
610 | ||
611 | ret = ti_sci_do_xfer(info, xfer); | |
612 | if (ret) { | |
613 | dev_err(dev, "Mbox send fail %d\n", ret); | |
614 | goto fail; | |
615 | } | |
616 | ||
617 | resp = (struct ti_sci_msg_resp_get_device_state *)xfer->xfer_buf; | |
618 | if (!ti_sci_is_response_ack(resp)) { | |
619 | ret = -ENODEV; | |
620 | goto fail; | |
621 | } | |
622 | ||
623 | if (clcnt) | |
624 | *clcnt = resp->context_loss_count; | |
625 | if (resets) | |
626 | *resets = resp->resets; | |
627 | if (p_state) | |
628 | *p_state = resp->programmed_state; | |
629 | if (c_state) | |
630 | *c_state = resp->current_state; | |
631 | fail: | |
632 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
633 | ||
634 | return ret; | |
635 | } | |
636 | ||
637 | /** | |
638 | * ti_sci_cmd_get_device() - command to request for device managed by TISCI | |
45b659ee | 639 | * that can be shared with other hosts. |
9e7d756d NM |
640 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle |
641 | * @id: Device Identifier | |
642 | * | |
643 | * Request for the device - NOTE: the client MUST maintain integrity of | |
644 | * usage count by balancing get_device with put_device. No refcounting is | |
645 | * managed by driver for that purpose. | |
646 | * | |
9e7d756d NM |
647 | * Return: 0 if all went fine, else return appropriate error. |
648 | */ | |
649 | static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id) | |
45b659ee LV |
650 | { |
651 | return ti_sci_set_device_state(handle, id, 0, | |
652 | MSG_DEVICE_SW_STATE_ON); | |
653 | } | |
654 | ||
655 | /** | |
656 | * ti_sci_cmd_get_device_exclusive() - command to request for device managed by | |
657 | * TISCI that is exclusively owned by the | |
658 | * requesting host. | |
659 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
660 | * @id: Device Identifier | |
661 | * | |
662 | * Request for the device - NOTE: the client MUST maintain integrity of | |
663 | * usage count by balancing get_device with put_device. No refcounting is | |
664 | * managed by driver for that purpose. | |
665 | * | |
666 | * Return: 0 if all went fine, else return appropriate error. | |
667 | */ | |
668 | static int ti_sci_cmd_get_device_exclusive(const struct ti_sci_handle *handle, | |
669 | u32 id) | |
9e7d756d NM |
670 | { |
671 | return ti_sci_set_device_state(handle, id, | |
672 | MSG_FLAG_DEVICE_EXCLUSIVE, | |
673 | MSG_DEVICE_SW_STATE_ON); | |
674 | } | |
675 | ||
676 | /** | |
677 | * ti_sci_cmd_idle_device() - Command to idle a device managed by TISCI | |
678 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
679 | * @id: Device Identifier | |
680 | * | |
681 | * Request for the device - NOTE: the client MUST maintain integrity of | |
682 | * usage count by balancing get_device with put_device. No refcounting is | |
683 | * managed by driver for that purpose. | |
684 | * | |
685 | * Return: 0 if all went fine, else return appropriate error. | |
686 | */ | |
687 | static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id) | |
45b659ee LV |
688 | { |
689 | return ti_sci_set_device_state(handle, id, 0, | |
690 | MSG_DEVICE_SW_STATE_RETENTION); | |
691 | } | |
692 | ||
693 | /** | |
694 | * ti_sci_cmd_idle_device_exclusive() - Command to idle a device managed by | |
695 | * TISCI that is exclusively owned by | |
696 | * requesting host. | |
697 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
698 | * @id: Device Identifier | |
699 | * | |
700 | * Request for the device - NOTE: the client MUST maintain integrity of | |
701 | * usage count by balancing get_device with put_device. No refcounting is | |
702 | * managed by driver for that purpose. | |
703 | * | |
704 | * Return: 0 if all went fine, else return appropriate error. | |
705 | */ | |
706 | static int ti_sci_cmd_idle_device_exclusive(const struct ti_sci_handle *handle, | |
707 | u32 id) | |
9e7d756d NM |
708 | { |
709 | return ti_sci_set_device_state(handle, id, | |
710 | MSG_FLAG_DEVICE_EXCLUSIVE, | |
711 | MSG_DEVICE_SW_STATE_RETENTION); | |
712 | } | |
713 | ||
714 | /** | |
715 | * ti_sci_cmd_put_device() - command to release a device managed by TISCI | |
716 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
717 | * @id: Device Identifier | |
718 | * | |
719 | * Request for the device - NOTE: the client MUST maintain integrity of | |
720 | * usage count by balancing get_device with put_device. No refcounting is | |
721 | * managed by driver for that purpose. | |
722 | * | |
723 | * Return: 0 if all went fine, else return appropriate error. | |
724 | */ | |
725 | static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id) | |
726 | { | |
727 | return ti_sci_set_device_state(handle, id, | |
728 | 0, MSG_DEVICE_SW_STATE_AUTO_OFF); | |
729 | } | |
730 | ||
731 | /** | |
732 | * ti_sci_cmd_dev_is_valid() - Is the device valid | |
733 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
734 | * @id: Device Identifier | |
735 | * | |
736 | * Return: 0 if all went fine and the device ID is valid, else return | |
737 | * appropriate error. | |
738 | */ | |
739 | static int ti_sci_cmd_dev_is_valid(const struct ti_sci_handle *handle, u32 id) | |
740 | { | |
741 | u8 unused; | |
742 | ||
743 | /* check the device state which will also tell us if the ID is valid */ | |
744 | return ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &unused); | |
745 | } | |
746 | ||
747 | /** | |
748 | * ti_sci_cmd_dev_get_clcnt() - Get context loss counter | |
749 | * @handle: Pointer to TISCI handle | |
750 | * @id: Device Identifier | |
751 | * @count: Pointer to Context Loss counter to populate | |
752 | * | |
753 | * Return: 0 if all went fine, else return appropriate error. | |
754 | */ | |
755 | static int ti_sci_cmd_dev_get_clcnt(const struct ti_sci_handle *handle, u32 id, | |
756 | u32 *count) | |
757 | { | |
758 | return ti_sci_get_device_state(handle, id, count, NULL, NULL, NULL); | |
759 | } | |
760 | ||
761 | /** | |
762 | * ti_sci_cmd_dev_is_idle() - Check if the device is requested to be idle | |
763 | * @handle: Pointer to TISCI handle | |
764 | * @id: Device Identifier | |
765 | * @r_state: true if requested to be idle | |
766 | * | |
767 | * Return: 0 if all went fine, else return appropriate error. | |
768 | */ | |
769 | static int ti_sci_cmd_dev_is_idle(const struct ti_sci_handle *handle, u32 id, | |
770 | bool *r_state) | |
771 | { | |
772 | int ret; | |
773 | u8 state; | |
774 | ||
775 | if (!r_state) | |
776 | return -EINVAL; | |
777 | ||
778 | ret = ti_sci_get_device_state(handle, id, NULL, NULL, &state, NULL); | |
779 | if (ret) | |
780 | return ret; | |
781 | ||
782 | *r_state = (state == MSG_DEVICE_SW_STATE_RETENTION); | |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
787 | /** | |
788 | * ti_sci_cmd_dev_is_stop() - Check if the device is requested to be stopped | |
789 | * @handle: Pointer to TISCI handle | |
790 | * @id: Device Identifier | |
791 | * @r_state: true if requested to be stopped | |
792 | * @curr_state: true if currently stopped. | |
793 | * | |
794 | * Return: 0 if all went fine, else return appropriate error. | |
795 | */ | |
796 | static int ti_sci_cmd_dev_is_stop(const struct ti_sci_handle *handle, u32 id, | |
797 | bool *r_state, bool *curr_state) | |
798 | { | |
799 | int ret; | |
800 | u8 p_state, c_state; | |
801 | ||
802 | if (!r_state && !curr_state) | |
803 | return -EINVAL; | |
804 | ||
805 | ret = | |
806 | ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); | |
807 | if (ret) | |
808 | return ret; | |
809 | ||
810 | if (r_state) | |
811 | *r_state = (p_state == MSG_DEVICE_SW_STATE_AUTO_OFF); | |
812 | if (curr_state) | |
813 | *curr_state = (c_state == MSG_DEVICE_HW_STATE_OFF); | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
818 | /** | |
819 | * ti_sci_cmd_dev_is_on() - Check if the device is requested to be ON | |
820 | * @handle: Pointer to TISCI handle | |
821 | * @id: Device Identifier | |
822 | * @r_state: true if requested to be ON | |
823 | * @curr_state: true if currently ON and active | |
824 | * | |
825 | * Return: 0 if all went fine, else return appropriate error. | |
826 | */ | |
827 | static int ti_sci_cmd_dev_is_on(const struct ti_sci_handle *handle, u32 id, | |
828 | bool *r_state, bool *curr_state) | |
829 | { | |
830 | int ret; | |
831 | u8 p_state, c_state; | |
832 | ||
833 | if (!r_state && !curr_state) | |
834 | return -EINVAL; | |
835 | ||
836 | ret = | |
837 | ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state); | |
838 | if (ret) | |
839 | return ret; | |
840 | ||
841 | if (r_state) | |
842 | *r_state = (p_state == MSG_DEVICE_SW_STATE_ON); | |
843 | if (curr_state) | |
844 | *curr_state = (c_state == MSG_DEVICE_HW_STATE_ON); | |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | /** | |
850 | * ti_sci_cmd_dev_is_trans() - Check if the device is currently transitioning | |
851 | * @handle: Pointer to TISCI handle | |
852 | * @id: Device Identifier | |
853 | * @curr_state: true if currently transitioning. | |
854 | * | |
855 | * Return: 0 if all went fine, else return appropriate error. | |
856 | */ | |
857 | static int ti_sci_cmd_dev_is_trans(const struct ti_sci_handle *handle, u32 id, | |
858 | bool *curr_state) | |
859 | { | |
860 | int ret; | |
861 | u8 state; | |
862 | ||
863 | if (!curr_state) | |
864 | return -EINVAL; | |
865 | ||
866 | ret = ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &state); | |
867 | if (ret) | |
868 | return ret; | |
869 | ||
870 | *curr_state = (state == MSG_DEVICE_HW_STATE_TRANS); | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | /** | |
876 | * ti_sci_cmd_set_device_resets() - command to set resets for device managed | |
877 | * by TISCI | |
878 | * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle | |
879 | * @id: Device Identifier | |
880 | * @reset_state: Device specific reset bit field | |
881 | * | |
882 | * Return: 0 if all went fine, else return appropriate error. | |
883 | */ | |
884 | static int ti_sci_cmd_set_device_resets(const struct ti_sci_handle *handle, | |
885 | u32 id, u32 reset_state) | |
886 | { | |
887 | struct ti_sci_info *info; | |
888 | struct ti_sci_msg_req_set_device_resets *req; | |
889 | struct ti_sci_msg_hdr *resp; | |
890 | struct ti_sci_xfer *xfer; | |
891 | struct device *dev; | |
892 | int ret = 0; | |
893 | ||
894 | if (IS_ERR(handle)) | |
895 | return PTR_ERR(handle); | |
896 | if (!handle) | |
897 | return -EINVAL; | |
898 | ||
899 | info = handle_to_ti_sci_info(handle); | |
900 | dev = info->dev; | |
901 | ||
902 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_DEVICE_RESETS, | |
903 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
904 | sizeof(*req), sizeof(*resp)); | |
905 | if (IS_ERR(xfer)) { | |
906 | ret = PTR_ERR(xfer); | |
907 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
908 | return ret; | |
909 | } | |
910 | req = (struct ti_sci_msg_req_set_device_resets *)xfer->xfer_buf; | |
911 | req->id = id; | |
912 | req->resets = reset_state; | |
913 | ||
914 | ret = ti_sci_do_xfer(info, xfer); | |
915 | if (ret) { | |
916 | dev_err(dev, "Mbox send fail %d\n", ret); | |
917 | goto fail; | |
918 | } | |
919 | ||
920 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
921 | ||
922 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
923 | ||
924 | fail: | |
925 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
926 | ||
927 | return ret; | |
928 | } | |
929 | ||
930 | /** | |
931 | * ti_sci_cmd_get_device_resets() - Get reset state for device managed | |
932 | * by TISCI | |
933 | * @handle: Pointer to TISCI handle | |
934 | * @id: Device Identifier | |
935 | * @reset_state: Pointer to reset state to populate | |
936 | * | |
937 | * Return: 0 if all went fine, else return appropriate error. | |
938 | */ | |
939 | static int ti_sci_cmd_get_device_resets(const struct ti_sci_handle *handle, | |
940 | u32 id, u32 *reset_state) | |
941 | { | |
942 | return ti_sci_get_device_state(handle, id, NULL, reset_state, NULL, | |
943 | NULL); | |
944 | } | |
945 | ||
9f723220 NM |
946 | /** |
947 | * ti_sci_set_clock_state() - Set clock state helper | |
948 | * @handle: pointer to TI SCI handle | |
949 | * @dev_id: Device identifier this request is for | |
950 | * @clk_id: Clock identifier for the device for this request. | |
951 | * Each device has it's own set of clock inputs. This indexes | |
952 | * which clock input to modify. | |
953 | * @flags: Header flags as needed | |
954 | * @state: State to request for the clock. | |
955 | * | |
956 | * Return: 0 if all went well, else returns appropriate error value. | |
957 | */ | |
958 | static int ti_sci_set_clock_state(const struct ti_sci_handle *handle, | |
81f4458c | 959 | u32 dev_id, u32 clk_id, |
9f723220 NM |
960 | u32 flags, u8 state) |
961 | { | |
962 | struct ti_sci_info *info; | |
963 | struct ti_sci_msg_req_set_clock_state *req; | |
964 | struct ti_sci_msg_hdr *resp; | |
965 | struct ti_sci_xfer *xfer; | |
966 | struct device *dev; | |
967 | int ret = 0; | |
968 | ||
969 | if (IS_ERR(handle)) | |
970 | return PTR_ERR(handle); | |
971 | if (!handle) | |
972 | return -EINVAL; | |
973 | ||
974 | info = handle_to_ti_sci_info(handle); | |
975 | dev = info->dev; | |
976 | ||
977 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_STATE, | |
978 | flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
979 | sizeof(*req), sizeof(*resp)); | |
980 | if (IS_ERR(xfer)) { | |
981 | ret = PTR_ERR(xfer); | |
982 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
983 | return ret; | |
984 | } | |
985 | req = (struct ti_sci_msg_req_set_clock_state *)xfer->xfer_buf; | |
986 | req->dev_id = dev_id; | |
81f4458c TK |
987 | if (clk_id < 255) { |
988 | req->clk_id = clk_id; | |
989 | } else { | |
990 | req->clk_id = 255; | |
991 | req->clk_id_32 = clk_id; | |
992 | } | |
9f723220 NM |
993 | req->request_state = state; |
994 | ||
995 | ret = ti_sci_do_xfer(info, xfer); | |
996 | if (ret) { | |
997 | dev_err(dev, "Mbox send fail %d\n", ret); | |
998 | goto fail; | |
999 | } | |
1000 | ||
1001 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1002 | ||
1003 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1004 | ||
1005 | fail: | |
1006 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1007 | ||
1008 | return ret; | |
1009 | } | |
1010 | ||
1011 | /** | |
1012 | * ti_sci_cmd_get_clock_state() - Get clock state helper | |
1013 | * @handle: pointer to TI SCI handle | |
1014 | * @dev_id: Device identifier this request is for | |
1015 | * @clk_id: Clock identifier for the device for this request. | |
1016 | * Each device has it's own set of clock inputs. This indexes | |
1017 | * which clock input to modify. | |
1018 | * @programmed_state: State requested for clock to move to | |
1019 | * @current_state: State that the clock is currently in | |
1020 | * | |
1021 | * Return: 0 if all went well, else returns appropriate error value. | |
1022 | */ | |
1023 | static int ti_sci_cmd_get_clock_state(const struct ti_sci_handle *handle, | |
81f4458c | 1024 | u32 dev_id, u32 clk_id, |
9f723220 NM |
1025 | u8 *programmed_state, u8 *current_state) |
1026 | { | |
1027 | struct ti_sci_info *info; | |
1028 | struct ti_sci_msg_req_get_clock_state *req; | |
1029 | struct ti_sci_msg_resp_get_clock_state *resp; | |
1030 | struct ti_sci_xfer *xfer; | |
1031 | struct device *dev; | |
1032 | int ret = 0; | |
1033 | ||
1034 | if (IS_ERR(handle)) | |
1035 | return PTR_ERR(handle); | |
1036 | if (!handle) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | if (!programmed_state && !current_state) | |
1040 | return -EINVAL; | |
1041 | ||
1042 | info = handle_to_ti_sci_info(handle); | |
1043 | dev = info->dev; | |
1044 | ||
1045 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_STATE, | |
1046 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1047 | sizeof(*req), sizeof(*resp)); | |
1048 | if (IS_ERR(xfer)) { | |
1049 | ret = PTR_ERR(xfer); | |
1050 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1051 | return ret; | |
1052 | } | |
1053 | req = (struct ti_sci_msg_req_get_clock_state *)xfer->xfer_buf; | |
1054 | req->dev_id = dev_id; | |
81f4458c TK |
1055 | if (clk_id < 255) { |
1056 | req->clk_id = clk_id; | |
1057 | } else { | |
1058 | req->clk_id = 255; | |
1059 | req->clk_id_32 = clk_id; | |
1060 | } | |
9f723220 NM |
1061 | |
1062 | ret = ti_sci_do_xfer(info, xfer); | |
1063 | if (ret) { | |
1064 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1065 | goto fail; | |
1066 | } | |
1067 | ||
1068 | resp = (struct ti_sci_msg_resp_get_clock_state *)xfer->xfer_buf; | |
1069 | ||
1070 | if (!ti_sci_is_response_ack(resp)) { | |
1071 | ret = -ENODEV; | |
1072 | goto fail; | |
1073 | } | |
1074 | ||
1075 | if (programmed_state) | |
1076 | *programmed_state = resp->programmed_state; | |
1077 | if (current_state) | |
1078 | *current_state = resp->current_state; | |
1079 | ||
1080 | fail: | |
1081 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1082 | ||
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | /** | |
1087 | * ti_sci_cmd_get_clock() - Get control of a clock from TI SCI | |
1088 | * @handle: pointer to TI SCI handle | |
1089 | * @dev_id: Device identifier this request is for | |
1090 | * @clk_id: Clock identifier for the device for this request. | |
1091 | * Each device has it's own set of clock inputs. This indexes | |
1092 | * which clock input to modify. | |
1093 | * @needs_ssc: 'true' if Spread Spectrum clock is desired, else 'false' | |
1094 | * @can_change_freq: 'true' if frequency change is desired, else 'false' | |
1095 | * @enable_input_term: 'true' if input termination is desired, else 'false' | |
1096 | * | |
1097 | * Return: 0 if all went well, else returns appropriate error value. | |
1098 | */ | |
1099 | static int ti_sci_cmd_get_clock(const struct ti_sci_handle *handle, u32 dev_id, | |
81f4458c TK |
1100 | u32 clk_id, bool needs_ssc, |
1101 | bool can_change_freq, bool enable_input_term) | |
9f723220 NM |
1102 | { |
1103 | u32 flags = 0; | |
1104 | ||
1105 | flags |= needs_ssc ? MSG_FLAG_CLOCK_ALLOW_SSC : 0; | |
1106 | flags |= can_change_freq ? MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE : 0; | |
1107 | flags |= enable_input_term ? MSG_FLAG_CLOCK_INPUT_TERM : 0; | |
1108 | ||
1109 | return ti_sci_set_clock_state(handle, dev_id, clk_id, flags, | |
1110 | MSG_CLOCK_SW_STATE_REQ); | |
1111 | } | |
1112 | ||
1113 | /** | |
1114 | * ti_sci_cmd_idle_clock() - Idle a clock which is in our control | |
1115 | * @handle: pointer to TI SCI handle | |
1116 | * @dev_id: Device identifier this request is for | |
1117 | * @clk_id: Clock identifier for the device for this request. | |
1118 | * Each device has it's own set of clock inputs. This indexes | |
1119 | * which clock input to modify. | |
1120 | * | |
1121 | * NOTE: This clock must have been requested by get_clock previously. | |
1122 | * | |
1123 | * Return: 0 if all went well, else returns appropriate error value. | |
1124 | */ | |
1125 | static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle, | |
81f4458c | 1126 | u32 dev_id, u32 clk_id) |
9f723220 | 1127 | { |
71b61082 TK |
1128 | return ti_sci_set_clock_state(handle, dev_id, clk_id, |
1129 | MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, | |
9f723220 NM |
1130 | MSG_CLOCK_SW_STATE_UNREQ); |
1131 | } | |
1132 | ||
1133 | /** | |
1134 | * ti_sci_cmd_put_clock() - Release a clock from our control back to TISCI | |
1135 | * @handle: pointer to TI SCI handle | |
1136 | * @dev_id: Device identifier this request is for | |
1137 | * @clk_id: Clock identifier for the device for this request. | |
1138 | * Each device has it's own set of clock inputs. This indexes | |
1139 | * which clock input to modify. | |
1140 | * | |
1141 | * NOTE: This clock must have been requested by get_clock previously. | |
1142 | * | |
1143 | * Return: 0 if all went well, else returns appropriate error value. | |
1144 | */ | |
1145 | static int ti_sci_cmd_put_clock(const struct ti_sci_handle *handle, | |
81f4458c | 1146 | u32 dev_id, u32 clk_id) |
9f723220 | 1147 | { |
71b61082 TK |
1148 | return ti_sci_set_clock_state(handle, dev_id, clk_id, |
1149 | MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, | |
9f723220 NM |
1150 | MSG_CLOCK_SW_STATE_AUTO); |
1151 | } | |
1152 | ||
1153 | /** | |
1154 | * ti_sci_cmd_clk_is_auto() - Is the clock being auto managed | |
1155 | * @handle: pointer to TI SCI handle | |
1156 | * @dev_id: Device identifier this request is for | |
1157 | * @clk_id: Clock identifier for the device for this request. | |
1158 | * Each device has it's own set of clock inputs. This indexes | |
1159 | * which clock input to modify. | |
1160 | * @req_state: state indicating if the clock is auto managed | |
1161 | * | |
1162 | * Return: 0 if all went well, else returns appropriate error value. | |
1163 | */ | |
1164 | static int ti_sci_cmd_clk_is_auto(const struct ti_sci_handle *handle, | |
81f4458c | 1165 | u32 dev_id, u32 clk_id, bool *req_state) |
9f723220 NM |
1166 | { |
1167 | u8 state = 0; | |
1168 | int ret; | |
1169 | ||
1170 | if (!req_state) | |
1171 | return -EINVAL; | |
1172 | ||
1173 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, &state, NULL); | |
1174 | if (ret) | |
1175 | return ret; | |
1176 | ||
1177 | *req_state = (state == MSG_CLOCK_SW_STATE_AUTO); | |
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * ti_sci_cmd_clk_is_on() - Is the clock ON | |
1183 | * @handle: pointer to TI SCI handle | |
1184 | * @dev_id: Device identifier this request is for | |
1185 | * @clk_id: Clock identifier for the device for this request. | |
1186 | * Each device has it's own set of clock inputs. This indexes | |
1187 | * which clock input to modify. | |
1188 | * @req_state: state indicating if the clock is managed by us and enabled | |
1189 | * @curr_state: state indicating if the clock is ready for operation | |
1190 | * | |
1191 | * Return: 0 if all went well, else returns appropriate error value. | |
1192 | */ | |
1193 | static int ti_sci_cmd_clk_is_on(const struct ti_sci_handle *handle, u32 dev_id, | |
81f4458c | 1194 | u32 clk_id, bool *req_state, bool *curr_state) |
9f723220 NM |
1195 | { |
1196 | u8 c_state = 0, r_state = 0; | |
1197 | int ret; | |
1198 | ||
1199 | if (!req_state && !curr_state) | |
1200 | return -EINVAL; | |
1201 | ||
1202 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, | |
1203 | &r_state, &c_state); | |
1204 | if (ret) | |
1205 | return ret; | |
1206 | ||
1207 | if (req_state) | |
1208 | *req_state = (r_state == MSG_CLOCK_SW_STATE_REQ); | |
1209 | if (curr_state) | |
1210 | *curr_state = (c_state == MSG_CLOCK_HW_STATE_READY); | |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | /** | |
1215 | * ti_sci_cmd_clk_is_off() - Is the clock OFF | |
1216 | * @handle: pointer to TI SCI handle | |
1217 | * @dev_id: Device identifier this request is for | |
1218 | * @clk_id: Clock identifier for the device for this request. | |
1219 | * Each device has it's own set of clock inputs. This indexes | |
1220 | * which clock input to modify. | |
1221 | * @req_state: state indicating if the clock is managed by us and disabled | |
1222 | * @curr_state: state indicating if the clock is NOT ready for operation | |
1223 | * | |
1224 | * Return: 0 if all went well, else returns appropriate error value. | |
1225 | */ | |
1226 | static int ti_sci_cmd_clk_is_off(const struct ti_sci_handle *handle, u32 dev_id, | |
81f4458c | 1227 | u32 clk_id, bool *req_state, bool *curr_state) |
9f723220 NM |
1228 | { |
1229 | u8 c_state = 0, r_state = 0; | |
1230 | int ret; | |
1231 | ||
1232 | if (!req_state && !curr_state) | |
1233 | return -EINVAL; | |
1234 | ||
1235 | ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, | |
1236 | &r_state, &c_state); | |
1237 | if (ret) | |
1238 | return ret; | |
1239 | ||
1240 | if (req_state) | |
1241 | *req_state = (r_state == MSG_CLOCK_SW_STATE_UNREQ); | |
1242 | if (curr_state) | |
1243 | *curr_state = (c_state == MSG_CLOCK_HW_STATE_NOT_READY); | |
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | /** | |
1248 | * ti_sci_cmd_clk_set_parent() - Set the clock source of a specific device clock | |
1249 | * @handle: pointer to TI SCI handle | |
1250 | * @dev_id: Device identifier this request is for | |
1251 | * @clk_id: Clock identifier for the device for this request. | |
1252 | * Each device has it's own set of clock inputs. This indexes | |
1253 | * which clock input to modify. | |
1254 | * @parent_id: Parent clock identifier to set | |
1255 | * | |
1256 | * Return: 0 if all went well, else returns appropriate error value. | |
1257 | */ | |
1258 | static int ti_sci_cmd_clk_set_parent(const struct ti_sci_handle *handle, | |
81f4458c | 1259 | u32 dev_id, u32 clk_id, u32 parent_id) |
9f723220 NM |
1260 | { |
1261 | struct ti_sci_info *info; | |
1262 | struct ti_sci_msg_req_set_clock_parent *req; | |
1263 | struct ti_sci_msg_hdr *resp; | |
1264 | struct ti_sci_xfer *xfer; | |
1265 | struct device *dev; | |
1266 | int ret = 0; | |
1267 | ||
1268 | if (IS_ERR(handle)) | |
1269 | return PTR_ERR(handle); | |
1270 | if (!handle) | |
1271 | return -EINVAL; | |
1272 | ||
1273 | info = handle_to_ti_sci_info(handle); | |
1274 | dev = info->dev; | |
1275 | ||
1276 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_PARENT, | |
1277 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1278 | sizeof(*req), sizeof(*resp)); | |
1279 | if (IS_ERR(xfer)) { | |
1280 | ret = PTR_ERR(xfer); | |
1281 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1282 | return ret; | |
1283 | } | |
1284 | req = (struct ti_sci_msg_req_set_clock_parent *)xfer->xfer_buf; | |
1285 | req->dev_id = dev_id; | |
81f4458c TK |
1286 | if (clk_id < 255) { |
1287 | req->clk_id = clk_id; | |
1288 | } else { | |
1289 | req->clk_id = 255; | |
1290 | req->clk_id_32 = clk_id; | |
1291 | } | |
1292 | if (parent_id < 255) { | |
1293 | req->parent_id = parent_id; | |
1294 | } else { | |
1295 | req->parent_id = 255; | |
1296 | req->parent_id_32 = parent_id; | |
1297 | } | |
9f723220 NM |
1298 | |
1299 | ret = ti_sci_do_xfer(info, xfer); | |
1300 | if (ret) { | |
1301 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1302 | goto fail; | |
1303 | } | |
1304 | ||
1305 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1306 | ||
1307 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1308 | ||
1309 | fail: | |
1310 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1311 | ||
1312 | return ret; | |
1313 | } | |
1314 | ||
1315 | /** | |
1316 | * ti_sci_cmd_clk_get_parent() - Get current parent clock source | |
1317 | * @handle: pointer to TI SCI handle | |
1318 | * @dev_id: Device identifier this request is for | |
1319 | * @clk_id: Clock identifier for the device for this request. | |
1320 | * Each device has it's own set of clock inputs. This indexes | |
1321 | * which clock input to modify. | |
1322 | * @parent_id: Current clock parent | |
1323 | * | |
1324 | * Return: 0 if all went well, else returns appropriate error value. | |
1325 | */ | |
1326 | static int ti_sci_cmd_clk_get_parent(const struct ti_sci_handle *handle, | |
81f4458c | 1327 | u32 dev_id, u32 clk_id, u32 *parent_id) |
9f723220 NM |
1328 | { |
1329 | struct ti_sci_info *info; | |
1330 | struct ti_sci_msg_req_get_clock_parent *req; | |
1331 | struct ti_sci_msg_resp_get_clock_parent *resp; | |
1332 | struct ti_sci_xfer *xfer; | |
1333 | struct device *dev; | |
1334 | int ret = 0; | |
1335 | ||
1336 | if (IS_ERR(handle)) | |
1337 | return PTR_ERR(handle); | |
1338 | if (!handle || !parent_id) | |
1339 | return -EINVAL; | |
1340 | ||
1341 | info = handle_to_ti_sci_info(handle); | |
1342 | dev = info->dev; | |
1343 | ||
1344 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_PARENT, | |
1345 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1346 | sizeof(*req), sizeof(*resp)); | |
1347 | if (IS_ERR(xfer)) { | |
1348 | ret = PTR_ERR(xfer); | |
1349 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1350 | return ret; | |
1351 | } | |
1352 | req = (struct ti_sci_msg_req_get_clock_parent *)xfer->xfer_buf; | |
1353 | req->dev_id = dev_id; | |
81f4458c TK |
1354 | if (clk_id < 255) { |
1355 | req->clk_id = clk_id; | |
1356 | } else { | |
1357 | req->clk_id = 255; | |
1358 | req->clk_id_32 = clk_id; | |
1359 | } | |
9f723220 NM |
1360 | |
1361 | ret = ti_sci_do_xfer(info, xfer); | |
1362 | if (ret) { | |
1363 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1364 | goto fail; | |
1365 | } | |
1366 | ||
1367 | resp = (struct ti_sci_msg_resp_get_clock_parent *)xfer->xfer_buf; | |
1368 | ||
81f4458c | 1369 | if (!ti_sci_is_response_ack(resp)) { |
9f723220 | 1370 | ret = -ENODEV; |
81f4458c TK |
1371 | } else { |
1372 | if (resp->parent_id < 255) | |
1373 | *parent_id = resp->parent_id; | |
1374 | else | |
1375 | *parent_id = resp->parent_id_32; | |
1376 | } | |
9f723220 NM |
1377 | |
1378 | fail: | |
1379 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1380 | ||
1381 | return ret; | |
1382 | } | |
1383 | ||
1384 | /** | |
1385 | * ti_sci_cmd_clk_get_num_parents() - Get num parents of the current clk source | |
1386 | * @handle: pointer to TI SCI handle | |
1387 | * @dev_id: Device identifier this request is for | |
1388 | * @clk_id: Clock identifier for the device for this request. | |
1389 | * Each device has it's own set of clock inputs. This indexes | |
1390 | * which clock input to modify. | |
1391 | * @num_parents: Returns he number of parents to the current clock. | |
1392 | * | |
1393 | * Return: 0 if all went well, else returns appropriate error value. | |
1394 | */ | |
1395 | static int ti_sci_cmd_clk_get_num_parents(const struct ti_sci_handle *handle, | |
81f4458c TK |
1396 | u32 dev_id, u32 clk_id, |
1397 | u32 *num_parents) | |
9f723220 NM |
1398 | { |
1399 | struct ti_sci_info *info; | |
1400 | struct ti_sci_msg_req_get_clock_num_parents *req; | |
1401 | struct ti_sci_msg_resp_get_clock_num_parents *resp; | |
1402 | struct ti_sci_xfer *xfer; | |
1403 | struct device *dev; | |
1404 | int ret = 0; | |
1405 | ||
1406 | if (IS_ERR(handle)) | |
1407 | return PTR_ERR(handle); | |
1408 | if (!handle || !num_parents) | |
1409 | return -EINVAL; | |
1410 | ||
1411 | info = handle_to_ti_sci_info(handle); | |
1412 | dev = info->dev; | |
1413 | ||
1414 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_NUM_CLOCK_PARENTS, | |
1415 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1416 | sizeof(*req), sizeof(*resp)); | |
1417 | if (IS_ERR(xfer)) { | |
1418 | ret = PTR_ERR(xfer); | |
1419 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1420 | return ret; | |
1421 | } | |
1422 | req = (struct ti_sci_msg_req_get_clock_num_parents *)xfer->xfer_buf; | |
1423 | req->dev_id = dev_id; | |
81f4458c TK |
1424 | if (clk_id < 255) { |
1425 | req->clk_id = clk_id; | |
1426 | } else { | |
1427 | req->clk_id = 255; | |
1428 | req->clk_id_32 = clk_id; | |
1429 | } | |
9f723220 NM |
1430 | |
1431 | ret = ti_sci_do_xfer(info, xfer); | |
1432 | if (ret) { | |
1433 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1434 | goto fail; | |
1435 | } | |
1436 | ||
1437 | resp = (struct ti_sci_msg_resp_get_clock_num_parents *)xfer->xfer_buf; | |
1438 | ||
81f4458c | 1439 | if (!ti_sci_is_response_ack(resp)) { |
9f723220 | 1440 | ret = -ENODEV; |
81f4458c TK |
1441 | } else { |
1442 | if (resp->num_parents < 255) | |
1443 | *num_parents = resp->num_parents; | |
1444 | else | |
1445 | *num_parents = resp->num_parents_32; | |
1446 | } | |
9f723220 NM |
1447 | |
1448 | fail: | |
1449 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1450 | ||
1451 | return ret; | |
1452 | } | |
1453 | ||
1454 | /** | |
1455 | * ti_sci_cmd_clk_get_match_freq() - Find a good match for frequency | |
1456 | * @handle: pointer to TI SCI handle | |
1457 | * @dev_id: Device identifier this request is for | |
1458 | * @clk_id: Clock identifier for the device for this request. | |
1459 | * Each device has it's own set of clock inputs. This indexes | |
1460 | * which clock input to modify. | |
1461 | * @min_freq: The minimum allowable frequency in Hz. This is the minimum | |
1462 | * allowable programmed frequency and does not account for clock | |
1463 | * tolerances and jitter. | |
1464 | * @target_freq: The target clock frequency in Hz. A frequency will be | |
1465 | * processed as close to this target frequency as possible. | |
1466 | * @max_freq: The maximum allowable frequency in Hz. This is the maximum | |
1467 | * allowable programmed frequency and does not account for clock | |
1468 | * tolerances and jitter. | |
1469 | * @match_freq: Frequency match in Hz response. | |
1470 | * | |
1471 | * Return: 0 if all went well, else returns appropriate error value. | |
1472 | */ | |
1473 | static int ti_sci_cmd_clk_get_match_freq(const struct ti_sci_handle *handle, | |
81f4458c | 1474 | u32 dev_id, u32 clk_id, u64 min_freq, |
9f723220 NM |
1475 | u64 target_freq, u64 max_freq, |
1476 | u64 *match_freq) | |
1477 | { | |
1478 | struct ti_sci_info *info; | |
1479 | struct ti_sci_msg_req_query_clock_freq *req; | |
1480 | struct ti_sci_msg_resp_query_clock_freq *resp; | |
1481 | struct ti_sci_xfer *xfer; | |
1482 | struct device *dev; | |
1483 | int ret = 0; | |
1484 | ||
1485 | if (IS_ERR(handle)) | |
1486 | return PTR_ERR(handle); | |
1487 | if (!handle || !match_freq) | |
1488 | return -EINVAL; | |
1489 | ||
1490 | info = handle_to_ti_sci_info(handle); | |
1491 | dev = info->dev; | |
1492 | ||
1493 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_QUERY_CLOCK_FREQ, | |
1494 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1495 | sizeof(*req), sizeof(*resp)); | |
1496 | if (IS_ERR(xfer)) { | |
1497 | ret = PTR_ERR(xfer); | |
1498 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1499 | return ret; | |
1500 | } | |
1501 | req = (struct ti_sci_msg_req_query_clock_freq *)xfer->xfer_buf; | |
1502 | req->dev_id = dev_id; | |
81f4458c TK |
1503 | if (clk_id < 255) { |
1504 | req->clk_id = clk_id; | |
1505 | } else { | |
1506 | req->clk_id = 255; | |
1507 | req->clk_id_32 = clk_id; | |
1508 | } | |
9f723220 NM |
1509 | req->min_freq_hz = min_freq; |
1510 | req->target_freq_hz = target_freq; | |
1511 | req->max_freq_hz = max_freq; | |
1512 | ||
1513 | ret = ti_sci_do_xfer(info, xfer); | |
1514 | if (ret) { | |
1515 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1516 | goto fail; | |
1517 | } | |
1518 | ||
1519 | resp = (struct ti_sci_msg_resp_query_clock_freq *)xfer->xfer_buf; | |
1520 | ||
1521 | if (!ti_sci_is_response_ack(resp)) | |
1522 | ret = -ENODEV; | |
1523 | else | |
1524 | *match_freq = resp->freq_hz; | |
1525 | ||
1526 | fail: | |
1527 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1528 | ||
1529 | return ret; | |
1530 | } | |
1531 | ||
1532 | /** | |
1533 | * ti_sci_cmd_clk_set_freq() - Set a frequency for clock | |
1534 | * @handle: pointer to TI SCI handle | |
1535 | * @dev_id: Device identifier this request is for | |
1536 | * @clk_id: Clock identifier for the device for this request. | |
1537 | * Each device has it's own set of clock inputs. This indexes | |
1538 | * which clock input to modify. | |
1539 | * @min_freq: The minimum allowable frequency in Hz. This is the minimum | |
1540 | * allowable programmed frequency and does not account for clock | |
1541 | * tolerances and jitter. | |
1542 | * @target_freq: The target clock frequency in Hz. A frequency will be | |
1543 | * processed as close to this target frequency as possible. | |
1544 | * @max_freq: The maximum allowable frequency in Hz. This is the maximum | |
1545 | * allowable programmed frequency and does not account for clock | |
1546 | * tolerances and jitter. | |
1547 | * | |
1548 | * Return: 0 if all went well, else returns appropriate error value. | |
1549 | */ | |
1550 | static int ti_sci_cmd_clk_set_freq(const struct ti_sci_handle *handle, | |
81f4458c | 1551 | u32 dev_id, u32 clk_id, u64 min_freq, |
9f723220 NM |
1552 | u64 target_freq, u64 max_freq) |
1553 | { | |
1554 | struct ti_sci_info *info; | |
1555 | struct ti_sci_msg_req_set_clock_freq *req; | |
1556 | struct ti_sci_msg_hdr *resp; | |
1557 | struct ti_sci_xfer *xfer; | |
1558 | struct device *dev; | |
1559 | int ret = 0; | |
1560 | ||
1561 | if (IS_ERR(handle)) | |
1562 | return PTR_ERR(handle); | |
1563 | if (!handle) | |
1564 | return -EINVAL; | |
1565 | ||
1566 | info = handle_to_ti_sci_info(handle); | |
1567 | dev = info->dev; | |
1568 | ||
1569 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CLOCK_FREQ, | |
1570 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1571 | sizeof(*req), sizeof(*resp)); | |
1572 | if (IS_ERR(xfer)) { | |
1573 | ret = PTR_ERR(xfer); | |
1574 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1575 | return ret; | |
1576 | } | |
1577 | req = (struct ti_sci_msg_req_set_clock_freq *)xfer->xfer_buf; | |
1578 | req->dev_id = dev_id; | |
81f4458c TK |
1579 | if (clk_id < 255) { |
1580 | req->clk_id = clk_id; | |
1581 | } else { | |
1582 | req->clk_id = 255; | |
1583 | req->clk_id_32 = clk_id; | |
1584 | } | |
9f723220 NM |
1585 | req->min_freq_hz = min_freq; |
1586 | req->target_freq_hz = target_freq; | |
1587 | req->max_freq_hz = max_freq; | |
1588 | ||
1589 | ret = ti_sci_do_xfer(info, xfer); | |
1590 | if (ret) { | |
1591 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1592 | goto fail; | |
1593 | } | |
1594 | ||
1595 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1596 | ||
1597 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1598 | ||
1599 | fail: | |
1600 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1601 | ||
1602 | return ret; | |
1603 | } | |
1604 | ||
1605 | /** | |
1606 | * ti_sci_cmd_clk_get_freq() - Get current frequency | |
1607 | * @handle: pointer to TI SCI handle | |
1608 | * @dev_id: Device identifier this request is for | |
1609 | * @clk_id: Clock identifier for the device for this request. | |
1610 | * Each device has it's own set of clock inputs. This indexes | |
1611 | * which clock input to modify. | |
1612 | * @freq: Currently frequency in Hz | |
1613 | * | |
1614 | * Return: 0 if all went well, else returns appropriate error value. | |
1615 | */ | |
1616 | static int ti_sci_cmd_clk_get_freq(const struct ti_sci_handle *handle, | |
81f4458c | 1617 | u32 dev_id, u32 clk_id, u64 *freq) |
9f723220 NM |
1618 | { |
1619 | struct ti_sci_info *info; | |
1620 | struct ti_sci_msg_req_get_clock_freq *req; | |
1621 | struct ti_sci_msg_resp_get_clock_freq *resp; | |
1622 | struct ti_sci_xfer *xfer; | |
1623 | struct device *dev; | |
1624 | int ret = 0; | |
1625 | ||
1626 | if (IS_ERR(handle)) | |
1627 | return PTR_ERR(handle); | |
1628 | if (!handle || !freq) | |
1629 | return -EINVAL; | |
1630 | ||
1631 | info = handle_to_ti_sci_info(handle); | |
1632 | dev = info->dev; | |
1633 | ||
1634 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_CLOCK_FREQ, | |
1635 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1636 | sizeof(*req), sizeof(*resp)); | |
1637 | if (IS_ERR(xfer)) { | |
1638 | ret = PTR_ERR(xfer); | |
1639 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1640 | return ret; | |
1641 | } | |
1642 | req = (struct ti_sci_msg_req_get_clock_freq *)xfer->xfer_buf; | |
1643 | req->dev_id = dev_id; | |
81f4458c TK |
1644 | if (clk_id < 255) { |
1645 | req->clk_id = clk_id; | |
1646 | } else { | |
1647 | req->clk_id = 255; | |
1648 | req->clk_id_32 = clk_id; | |
1649 | } | |
9f723220 NM |
1650 | |
1651 | ret = ti_sci_do_xfer(info, xfer); | |
1652 | if (ret) { | |
1653 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1654 | goto fail; | |
1655 | } | |
1656 | ||
1657 | resp = (struct ti_sci_msg_resp_get_clock_freq *)xfer->xfer_buf; | |
1658 | ||
1659 | if (!ti_sci_is_response_ack(resp)) | |
1660 | ret = -ENODEV; | |
1661 | else | |
1662 | *freq = resp->freq_hz; | |
1663 | ||
1664 | fail: | |
1665 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1666 | ||
1667 | return ret; | |
1668 | } | |
1669 | ||
912cffb4 NM |
1670 | static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle) |
1671 | { | |
1672 | struct ti_sci_info *info; | |
1673 | struct ti_sci_msg_req_reboot *req; | |
1674 | struct ti_sci_msg_hdr *resp; | |
1675 | struct ti_sci_xfer *xfer; | |
1676 | struct device *dev; | |
1677 | int ret = 0; | |
1678 | ||
1679 | if (IS_ERR(handle)) | |
1680 | return PTR_ERR(handle); | |
1681 | if (!handle) | |
1682 | return -EINVAL; | |
1683 | ||
1684 | info = handle_to_ti_sci_info(handle); | |
1685 | dev = info->dev; | |
1686 | ||
1687 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SYS_RESET, | |
1688 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1689 | sizeof(*req), sizeof(*resp)); | |
1690 | if (IS_ERR(xfer)) { | |
1691 | ret = PTR_ERR(xfer); | |
1692 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1693 | return ret; | |
1694 | } | |
1695 | req = (struct ti_sci_msg_req_reboot *)xfer->xfer_buf; | |
1696 | ||
1697 | ret = ti_sci_do_xfer(info, xfer); | |
1698 | if (ret) { | |
1699 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1700 | goto fail; | |
1701 | } | |
1702 | ||
1703 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1704 | ||
1705 | if (!ti_sci_is_response_ack(resp)) | |
1706 | ret = -ENODEV; | |
1707 | else | |
1708 | ret = 0; | |
1709 | ||
1710 | fail: | |
1711 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1712 | ||
1713 | return ret; | |
1714 | } | |
1715 | ||
9c19fb68 LV |
1716 | /** |
1717 | * ti_sci_get_resource_range - Helper to get a range of resources assigned | |
1718 | * to a host. Resource is uniquely identified by | |
1719 | * type and subtype. | |
1720 | * @handle: Pointer to TISCI handle. | |
1721 | * @dev_id: TISCI device ID. | |
1722 | * @subtype: Resource assignment subtype that is being requested | |
1723 | * from the given device. | |
1724 | * @s_host: Host processor ID to which the resources are allocated | |
967a020b PU |
1725 | * @desc: Pointer to ti_sci_resource_desc to be updated with the |
1726 | * resource range start index and number of resources | |
9c19fb68 LV |
1727 | * |
1728 | * Return: 0 if all went fine, else return appropriate error. | |
1729 | */ | |
1730 | static int ti_sci_get_resource_range(const struct ti_sci_handle *handle, | |
1731 | u32 dev_id, u8 subtype, u8 s_host, | |
967a020b | 1732 | struct ti_sci_resource_desc *desc) |
9c19fb68 LV |
1733 | { |
1734 | struct ti_sci_msg_resp_get_resource_range *resp; | |
1735 | struct ti_sci_msg_req_get_resource_range *req; | |
1736 | struct ti_sci_xfer *xfer; | |
1737 | struct ti_sci_info *info; | |
1738 | struct device *dev; | |
9c19fb68 LV |
1739 | int ret = 0; |
1740 | ||
1741 | if (IS_ERR(handle)) | |
1742 | return PTR_ERR(handle); | |
967a020b | 1743 | if (!handle || !desc) |
9c19fb68 LV |
1744 | return -EINVAL; |
1745 | ||
1746 | info = handle_to_ti_sci_info(handle); | |
1747 | dev = info->dev; | |
1748 | ||
1749 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_RESOURCE_RANGE, | |
1750 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1751 | sizeof(*req), sizeof(*resp)); | |
1752 | if (IS_ERR(xfer)) { | |
1753 | ret = PTR_ERR(xfer); | |
1754 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1755 | return ret; | |
1756 | } | |
1757 | ||
9c19fb68 LV |
1758 | req = (struct ti_sci_msg_req_get_resource_range *)xfer->xfer_buf; |
1759 | req->secondary_host = s_host; | |
9b98e02a | 1760 | req->type = dev_id & MSG_RM_RESOURCE_TYPE_MASK; |
9c19fb68 LV |
1761 | req->subtype = subtype & MSG_RM_RESOURCE_SUBTYPE_MASK; |
1762 | ||
1763 | ret = ti_sci_do_xfer(info, xfer); | |
1764 | if (ret) { | |
1765 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1766 | goto fail; | |
1767 | } | |
1768 | ||
1769 | resp = (struct ti_sci_msg_resp_get_resource_range *)xfer->xfer_buf; | |
1770 | ||
1771 | if (!ti_sci_is_response_ack(resp)) { | |
1772 | ret = -ENODEV; | |
519c5c0c PU |
1773 | } else if (!resp->range_num && !resp->range_num_sec) { |
1774 | /* Neither of the two resource range is valid */ | |
9c19fb68 LV |
1775 | ret = -ENODEV; |
1776 | } else { | |
967a020b PU |
1777 | desc->start = resp->range_start; |
1778 | desc->num = resp->range_num; | |
519c5c0c PU |
1779 | desc->start_sec = resp->range_start_sec; |
1780 | desc->num_sec = resp->range_num_sec; | |
7c1c1d36 | 1781 | } |
9c19fb68 LV |
1782 | |
1783 | fail: | |
1784 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1785 | ||
1786 | return ret; | |
1787 | } | |
1788 | ||
1789 | /** | |
1790 | * ti_sci_cmd_get_resource_range - Get a range of resources assigned to host | |
1791 | * that is same as ti sci interface host. | |
1792 | * @handle: Pointer to TISCI handle. | |
1793 | * @dev_id: TISCI device ID. | |
1794 | * @subtype: Resource assignment subtype that is being requested | |
1795 | * from the given device. | |
967a020b PU |
1796 | * @desc: Pointer to ti_sci_resource_desc to be updated with the |
1797 | * resource range start index and number of resources | |
9c19fb68 LV |
1798 | * |
1799 | * Return: 0 if all went fine, else return appropriate error. | |
1800 | */ | |
1801 | static int ti_sci_cmd_get_resource_range(const struct ti_sci_handle *handle, | |
1802 | u32 dev_id, u8 subtype, | |
967a020b | 1803 | struct ti_sci_resource_desc *desc) |
9c19fb68 LV |
1804 | { |
1805 | return ti_sci_get_resource_range(handle, dev_id, subtype, | |
1806 | TI_SCI_IRQ_SECONDARY_HOST_INVALID, | |
967a020b | 1807 | desc); |
9c19fb68 LV |
1808 | } |
1809 | ||
1810 | /** | |
1811 | * ti_sci_cmd_get_resource_range_from_shost - Get a range of resources | |
1812 | * assigned to a specified host. | |
1813 | * @handle: Pointer to TISCI handle. | |
1814 | * @dev_id: TISCI device ID. | |
1815 | * @subtype: Resource assignment subtype that is being requested | |
1816 | * from the given device. | |
1817 | * @s_host: Host processor ID to which the resources are allocated | |
967a020b PU |
1818 | * @desc: Pointer to ti_sci_resource_desc to be updated with the |
1819 | * resource range start index and number of resources | |
9c19fb68 LV |
1820 | * |
1821 | * Return: 0 if all went fine, else return appropriate error. | |
1822 | */ | |
1823 | static | |
1824 | int ti_sci_cmd_get_resource_range_from_shost(const struct ti_sci_handle *handle, | |
1825 | u32 dev_id, u8 subtype, u8 s_host, | |
967a020b | 1826 | struct ti_sci_resource_desc *desc) |
9c19fb68 | 1827 | { |
967a020b | 1828 | return ti_sci_get_resource_range(handle, dev_id, subtype, s_host, desc); |
9c19fb68 LV |
1829 | } |
1830 | ||
997b001f LV |
1831 | /** |
1832 | * ti_sci_manage_irq() - Helper api to configure/release the irq route between | |
1833 | * the requested source and destination | |
1834 | * @handle: Pointer to TISCI handle. | |
1835 | * @valid_params: Bit fields defining the validity of certain params | |
1836 | * @src_id: Device ID of the IRQ source | |
1837 | * @src_index: IRQ source index within the source device | |
1838 | * @dst_id: Device ID of the IRQ destination | |
1839 | * @dst_host_irq: IRQ number of the destination device | |
1840 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1841 | * @vint: Virtual interrupt to be used within the IA | |
1842 | * @global_event: Global event number to be used for the requesting event | |
1843 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1844 | * @s_host: Secondary host ID to which the irq/event is being | |
1845 | * requested for. | |
1846 | * @type: Request type irq set or release. | |
1847 | * | |
1848 | * Return: 0 if all went fine, else return appropriate error. | |
1849 | */ | |
1850 | static int ti_sci_manage_irq(const struct ti_sci_handle *handle, | |
1851 | u32 valid_params, u16 src_id, u16 src_index, | |
1852 | u16 dst_id, u16 dst_host_irq, u16 ia_id, u16 vint, | |
1853 | u16 global_event, u8 vint_status_bit, u8 s_host, | |
1854 | u16 type) | |
1855 | { | |
1856 | struct ti_sci_msg_req_manage_irq *req; | |
1857 | struct ti_sci_msg_hdr *resp; | |
1858 | struct ti_sci_xfer *xfer; | |
1859 | struct ti_sci_info *info; | |
1860 | struct device *dev; | |
1861 | int ret = 0; | |
1862 | ||
1863 | if (IS_ERR(handle)) | |
1864 | return PTR_ERR(handle); | |
1865 | if (!handle) | |
1866 | return -EINVAL; | |
1867 | ||
1868 | info = handle_to_ti_sci_info(handle); | |
1869 | dev = info->dev; | |
1870 | ||
1871 | xfer = ti_sci_get_one_xfer(info, type, TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
1872 | sizeof(*req), sizeof(*resp)); | |
1873 | if (IS_ERR(xfer)) { | |
1874 | ret = PTR_ERR(xfer); | |
1875 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
1876 | return ret; | |
1877 | } | |
1878 | req = (struct ti_sci_msg_req_manage_irq *)xfer->xfer_buf; | |
1879 | req->valid_params = valid_params; | |
1880 | req->src_id = src_id; | |
1881 | req->src_index = src_index; | |
1882 | req->dst_id = dst_id; | |
1883 | req->dst_host_irq = dst_host_irq; | |
1884 | req->ia_id = ia_id; | |
1885 | req->vint = vint; | |
1886 | req->global_event = global_event; | |
1887 | req->vint_status_bit = vint_status_bit; | |
1888 | req->secondary_host = s_host; | |
1889 | ||
1890 | ret = ti_sci_do_xfer(info, xfer); | |
1891 | if (ret) { | |
1892 | dev_err(dev, "Mbox send fail %d\n", ret); | |
1893 | goto fail; | |
1894 | } | |
1895 | ||
1896 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
1897 | ||
1898 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
1899 | ||
1900 | fail: | |
1901 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
1902 | ||
1903 | return ret; | |
1904 | } | |
1905 | ||
1906 | /** | |
1907 | * ti_sci_set_irq() - Helper api to configure the irq route between the | |
1908 | * requested source and destination | |
1909 | * @handle: Pointer to TISCI handle. | |
1910 | * @valid_params: Bit fields defining the validity of certain params | |
1911 | * @src_id: Device ID of the IRQ source | |
1912 | * @src_index: IRQ source index within the source device | |
1913 | * @dst_id: Device ID of the IRQ destination | |
1914 | * @dst_host_irq: IRQ number of the destination device | |
1915 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1916 | * @vint: Virtual interrupt to be used within the IA | |
1917 | * @global_event: Global event number to be used for the requesting event | |
1918 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1919 | * @s_host: Secondary host ID to which the irq/event is being | |
1920 | * requested for. | |
1921 | * | |
1922 | * Return: 0 if all went fine, else return appropriate error. | |
1923 | */ | |
1924 | static int ti_sci_set_irq(const struct ti_sci_handle *handle, u32 valid_params, | |
1925 | u16 src_id, u16 src_index, u16 dst_id, | |
1926 | u16 dst_host_irq, u16 ia_id, u16 vint, | |
1927 | u16 global_event, u8 vint_status_bit, u8 s_host) | |
1928 | { | |
1929 | 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", | |
1930 | __func__, valid_params, src_id, src_index, | |
1931 | dst_id, dst_host_irq, ia_id, vint, global_event, | |
1932 | vint_status_bit); | |
1933 | ||
1934 | return ti_sci_manage_irq(handle, valid_params, src_id, src_index, | |
1935 | dst_id, dst_host_irq, ia_id, vint, | |
1936 | global_event, vint_status_bit, s_host, | |
1937 | TI_SCI_MSG_SET_IRQ); | |
1938 | } | |
1939 | ||
1940 | /** | |
1941 | * ti_sci_free_irq() - Helper api to free the irq route between the | |
1942 | * requested source and destination | |
1943 | * @handle: Pointer to TISCI handle. | |
1944 | * @valid_params: Bit fields defining the validity of certain params | |
1945 | * @src_id: Device ID of the IRQ source | |
1946 | * @src_index: IRQ source index within the source device | |
1947 | * @dst_id: Device ID of the IRQ destination | |
1948 | * @dst_host_irq: IRQ number of the destination device | |
1949 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
1950 | * @vint: Virtual interrupt to be used within the IA | |
1951 | * @global_event: Global event number to be used for the requesting event | |
1952 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
1953 | * @s_host: Secondary host ID to which the irq/event is being | |
1954 | * requested for. | |
1955 | * | |
1956 | * Return: 0 if all went fine, else return appropriate error. | |
1957 | */ | |
1958 | static int ti_sci_free_irq(const struct ti_sci_handle *handle, u32 valid_params, | |
1959 | u16 src_id, u16 src_index, u16 dst_id, | |
1960 | u16 dst_host_irq, u16 ia_id, u16 vint, | |
1961 | u16 global_event, u8 vint_status_bit, u8 s_host) | |
1962 | { | |
1963 | 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", | |
1964 | __func__, valid_params, src_id, src_index, | |
1965 | dst_id, dst_host_irq, ia_id, vint, global_event, | |
1966 | vint_status_bit); | |
1967 | ||
1968 | return ti_sci_manage_irq(handle, valid_params, src_id, src_index, | |
1969 | dst_id, dst_host_irq, ia_id, vint, | |
1970 | global_event, vint_status_bit, s_host, | |
1971 | TI_SCI_MSG_FREE_IRQ); | |
1972 | } | |
1973 | ||
1974 | /** | |
1975 | * ti_sci_cmd_set_irq() - Configure a host irq route between the requested | |
1976 | * source and destination. | |
1977 | * @handle: Pointer to TISCI handle. | |
1978 | * @src_id: Device ID of the IRQ source | |
1979 | * @src_index: IRQ source index within the source device | |
1980 | * @dst_id: Device ID of the IRQ destination | |
1981 | * @dst_host_irq: IRQ number of the destination device | |
1982 | * @vint_irq: Boolean specifying if this interrupt belongs to | |
1983 | * Interrupt Aggregator. | |
1984 | * | |
1985 | * Return: 0 if all went fine, else return appropriate error. | |
1986 | */ | |
1987 | static int ti_sci_cmd_set_irq(const struct ti_sci_handle *handle, u16 src_id, | |
1988 | u16 src_index, u16 dst_id, u16 dst_host_irq) | |
1989 | { | |
1990 | u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; | |
1991 | ||
1992 | return ti_sci_set_irq(handle, valid_params, src_id, src_index, dst_id, | |
1993 | dst_host_irq, 0, 0, 0, 0, 0); | |
1994 | } | |
1995 | ||
1996 | /** | |
1997 | * ti_sci_cmd_set_event_map() - Configure an event based irq route between the | |
1998 | * requested source and Interrupt Aggregator. | |
1999 | * @handle: Pointer to TISCI handle. | |
2000 | * @src_id: Device ID of the IRQ source | |
2001 | * @src_index: IRQ source index within the source device | |
2002 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
2003 | * @vint: Virtual interrupt to be used within the IA | |
2004 | * @global_event: Global event number to be used for the requesting event | |
2005 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
2006 | * | |
2007 | * Return: 0 if all went fine, else return appropriate error. | |
2008 | */ | |
2009 | static int ti_sci_cmd_set_event_map(const struct ti_sci_handle *handle, | |
2010 | u16 src_id, u16 src_index, u16 ia_id, | |
2011 | u16 vint, u16 global_event, | |
2012 | u8 vint_status_bit) | |
2013 | { | |
2014 | u32 valid_params = MSG_FLAG_IA_ID_VALID | MSG_FLAG_VINT_VALID | | |
2015 | MSG_FLAG_GLB_EVNT_VALID | | |
2016 | MSG_FLAG_VINT_STS_BIT_VALID; | |
2017 | ||
2018 | return ti_sci_set_irq(handle, valid_params, src_id, src_index, 0, 0, | |
2019 | ia_id, vint, global_event, vint_status_bit, 0); | |
2020 | } | |
2021 | ||
2022 | /** | |
2023 | * ti_sci_cmd_free_irq() - Free a host irq route between the between the | |
2024 | * requested source and destination. | |
2025 | * @handle: Pointer to TISCI handle. | |
2026 | * @src_id: Device ID of the IRQ source | |
2027 | * @src_index: IRQ source index within the source device | |
2028 | * @dst_id: Device ID of the IRQ destination | |
2029 | * @dst_host_irq: IRQ number of the destination device | |
2030 | * @vint_irq: Boolean specifying if this interrupt belongs to | |
2031 | * Interrupt Aggregator. | |
2032 | * | |
2033 | * Return: 0 if all went fine, else return appropriate error. | |
2034 | */ | |
2035 | static int ti_sci_cmd_free_irq(const struct ti_sci_handle *handle, u16 src_id, | |
2036 | u16 src_index, u16 dst_id, u16 dst_host_irq) | |
2037 | { | |
2038 | u32 valid_params = MSG_FLAG_DST_ID_VALID | MSG_FLAG_DST_HOST_IRQ_VALID; | |
2039 | ||
2040 | return ti_sci_free_irq(handle, valid_params, src_id, src_index, dst_id, | |
2041 | dst_host_irq, 0, 0, 0, 0, 0); | |
2042 | } | |
2043 | ||
2044 | /** | |
2045 | * ti_sci_cmd_free_event_map() - Free an event map between the requested source | |
2046 | * and Interrupt Aggregator. | |
2047 | * @handle: Pointer to TISCI handle. | |
2048 | * @src_id: Device ID of the IRQ source | |
2049 | * @src_index: IRQ source index within the source device | |
2050 | * @ia_id: Device ID of the IA, if the IRQ flows through this IA | |
2051 | * @vint: Virtual interrupt to be used within the IA | |
2052 | * @global_event: Global event number to be used for the requesting event | |
2053 | * @vint_status_bit: Virtual interrupt status bit to be used for the event | |
2054 | * | |
2055 | * Return: 0 if all went fine, else return appropriate error. | |
2056 | */ | |
2057 | static int ti_sci_cmd_free_event_map(const struct ti_sci_handle *handle, | |
2058 | u16 src_id, u16 src_index, u16 ia_id, | |
2059 | u16 vint, u16 global_event, | |
2060 | u8 vint_status_bit) | |
2061 | { | |
2062 | u32 valid_params = MSG_FLAG_IA_ID_VALID | | |
2063 | MSG_FLAG_VINT_VALID | MSG_FLAG_GLB_EVNT_VALID | | |
2064 | MSG_FLAG_VINT_STS_BIT_VALID; | |
2065 | ||
2066 | return ti_sci_free_irq(handle, valid_params, src_id, src_index, 0, 0, | |
2067 | ia_id, vint, global_event, vint_status_bit, 0); | |
2068 | } | |
2069 | ||
3c201753 PU |
2070 | /** |
2071 | * ti_sci_cmd_rm_ring_cfg() - Configure a NAVSS ring | |
2072 | * @handle: Pointer to TI SCI handle. | |
2073 | * @params: Pointer to ti_sci_msg_rm_ring_cfg ring config structure | |
2074 | * | |
2075 | * Return: 0 if all went well, else returns appropriate error value. | |
2076 | * | |
2077 | * See @ti_sci_msg_rm_ring_cfg and @ti_sci_msg_rm_ring_cfg_req for | |
2078 | * more info. | |
2079 | */ | |
2080 | static int ti_sci_cmd_rm_ring_cfg(const struct ti_sci_handle *handle, | |
2081 | const struct ti_sci_msg_rm_ring_cfg *params) | |
2082 | { | |
2083 | struct ti_sci_msg_rm_ring_cfg_req *req; | |
2084 | struct ti_sci_msg_hdr *resp; | |
2085 | struct ti_sci_xfer *xfer; | |
2086 | struct ti_sci_info *info; | |
2087 | struct device *dev; | |
2088 | int ret = 0; | |
2089 | ||
2090 | if (IS_ERR_OR_NULL(handle)) | |
2091 | return -EINVAL; | |
2092 | ||
2093 | info = handle_to_ti_sci_info(handle); | |
2094 | dev = info->dev; | |
2095 | ||
2096 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_RM_RING_CFG, | |
2097 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2098 | sizeof(*req), sizeof(*resp)); | |
2099 | if (IS_ERR(xfer)) { | |
2100 | ret = PTR_ERR(xfer); | |
2101 | dev_err(dev, "RM_RA:Message config failed(%d)\n", ret); | |
2102 | return ret; | |
2103 | } | |
2104 | req = (struct ti_sci_msg_rm_ring_cfg_req *)xfer->xfer_buf; | |
2105 | req->valid_params = params->valid_params; | |
2106 | req->nav_id = params->nav_id; | |
2107 | req->index = params->index; | |
2108 | req->addr_lo = params->addr_lo; | |
2109 | req->addr_hi = params->addr_hi; | |
2110 | req->count = params->count; | |
2111 | req->mode = params->mode; | |
2112 | req->size = params->size; | |
2113 | req->order_id = params->order_id; | |
2114 | req->virtid = params->virtid; | |
2115 | req->asel = params->asel; | |
2116 | ||
2117 | ret = ti_sci_do_xfer(info, xfer); | |
2118 | if (ret) { | |
2119 | dev_err(dev, "RM_RA:Mbox config send fail %d\n", ret); | |
2120 | goto fail; | |
2121 | } | |
2122 | ||
2123 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2124 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2125 | ||
2126 | fail: | |
2127 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2128 | dev_dbg(dev, "RM_RA:config ring %u ret:%d\n", params->index, ret); | |
2129 | return ret; | |
2130 | } | |
2131 | ||
aa276781 | 2132 | /** |
68608b5e PU |
2133 | * ti_sci_cmd_rm_psil_pair() - Pair PSI-L source to destination thread |
2134 | * @handle: Pointer to TI SCI handle. | |
2135 | * @nav_id: Device ID of Navigator Subsystem which should be used for | |
2136 | * pairing | |
2137 | * @src_thread: Source PSI-L thread ID | |
2138 | * @dst_thread: Destination PSI-L thread ID | |
aa276781 | 2139 | * |
68608b5e | 2140 | * Return: 0 if all went well, else returns appropriate error value. |
aa276781 | 2141 | */ |
68608b5e PU |
2142 | static int ti_sci_cmd_rm_psil_pair(const struct ti_sci_handle *handle, |
2143 | u32 nav_id, u32 src_thread, u32 dst_thread) | |
aa276781 | 2144 | { |
68608b5e PU |
2145 | struct ti_sci_msg_psil_pair *req; |
2146 | struct ti_sci_msg_hdr *resp; | |
2147 | struct ti_sci_xfer *xfer; | |
aa276781 | 2148 | struct ti_sci_info *info; |
68608b5e PU |
2149 | struct device *dev; |
2150 | int ret = 0; | |
aa276781 NM |
2151 | |
2152 | if (IS_ERR(handle)) | |
2153 | return PTR_ERR(handle); | |
2154 | if (!handle) | |
2155 | return -EINVAL; | |
2156 | ||
2157 | info = handle_to_ti_sci_info(handle); | |
68608b5e | 2158 | dev = info->dev; |
aa276781 | 2159 | |
68608b5e PU |
2160 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_RM_PSIL_PAIR, |
2161 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2162 | sizeof(*req), sizeof(*resp)); | |
2163 | if (IS_ERR(xfer)) { | |
2164 | ret = PTR_ERR(xfer); | |
2165 | dev_err(dev, "RM_PSIL:Message reconfig failed(%d)\n", ret); | |
2166 | return ret; | |
2167 | } | |
2168 | req = (struct ti_sci_msg_psil_pair *)xfer->xfer_buf; | |
2169 | req->nav_id = nav_id; | |
2170 | req->src_thread = src_thread; | |
2171 | req->dst_thread = dst_thread; | |
aa276781 | 2172 | |
68608b5e PU |
2173 | ret = ti_sci_do_xfer(info, xfer); |
2174 | if (ret) { | |
2175 | dev_err(dev, "RM_PSIL:Mbox send fail %d\n", ret); | |
2176 | goto fail; | |
2177 | } | |
aa276781 | 2178 | |
68608b5e PU |
2179 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; |
2180 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2181 | ||
2182 | fail: | |
2183 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2184 | ||
2185 | return ret; | |
aa276781 NM |
2186 | } |
2187 | ||
2188 | /** | |
68608b5e PU |
2189 | * ti_sci_cmd_rm_psil_unpair() - Unpair PSI-L source from destination thread |
2190 | * @handle: Pointer to TI SCI handle. | |
2191 | * @nav_id: Device ID of Navigator Subsystem which should be used for | |
2192 | * unpairing | |
2193 | * @src_thread: Source PSI-L thread ID | |
2194 | * @dst_thread: Destination PSI-L thread ID | |
aa276781 | 2195 | * |
68608b5e | 2196 | * Return: 0 if all went well, else returns appropriate error value. |
aa276781 | 2197 | */ |
68608b5e PU |
2198 | static int ti_sci_cmd_rm_psil_unpair(const struct ti_sci_handle *handle, |
2199 | u32 nav_id, u32 src_thread, u32 dst_thread) | |
aa276781 | 2200 | { |
68608b5e PU |
2201 | struct ti_sci_msg_psil_unpair *req; |
2202 | struct ti_sci_msg_hdr *resp; | |
2203 | struct ti_sci_xfer *xfer; | |
2204 | struct ti_sci_info *info; | |
2205 | struct device *dev; | |
2206 | int ret = 0; | |
aa276781 | 2207 | |
68608b5e PU |
2208 | if (IS_ERR(handle)) |
2209 | return PTR_ERR(handle); | |
2210 | if (!handle) | |
2211 | return -EINVAL; | |
aa276781 | 2212 | |
68608b5e PU |
2213 | info = handle_to_ti_sci_info(handle); |
2214 | dev = info->dev; | |
2215 | ||
2216 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_RM_PSIL_UNPAIR, | |
2217 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2218 | sizeof(*req), sizeof(*resp)); | |
2219 | if (IS_ERR(xfer)) { | |
2220 | ret = PTR_ERR(xfer); | |
2221 | dev_err(dev, "RM_PSIL:Message reconfig failed(%d)\n", ret); | |
2222 | return ret; | |
aa276781 | 2223 | } |
68608b5e PU |
2224 | req = (struct ti_sci_msg_psil_unpair *)xfer->xfer_buf; |
2225 | req->nav_id = nav_id; | |
2226 | req->src_thread = src_thread; | |
2227 | req->dst_thread = dst_thread; | |
aa276781 | 2228 | |
68608b5e PU |
2229 | ret = ti_sci_do_xfer(info, xfer); |
2230 | if (ret) { | |
2231 | dev_err(dev, "RM_PSIL:Mbox send fail %d\n", ret); | |
2232 | goto fail; | |
2233 | } | |
2234 | ||
2235 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2236 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2237 | ||
2238 | fail: | |
2239 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2240 | ||
2241 | return ret; | |
aa276781 | 2242 | } |
aa276781 | 2243 | |
905c3047 | 2244 | /** |
68608b5e PU |
2245 | * ti_sci_cmd_rm_udmap_tx_ch_cfg() - Configure a UDMAP TX channel |
2246 | * @handle: Pointer to TI SCI handle. | |
2247 | * @params: Pointer to ti_sci_msg_rm_udmap_tx_ch_cfg TX channel config | |
2248 | * structure | |
905c3047 | 2249 | * |
68608b5e PU |
2250 | * Return: 0 if all went well, else returns appropriate error value. |
2251 | * | |
2252 | * See @ti_sci_msg_rm_udmap_tx_ch_cfg and @ti_sci_msg_rm_udmap_tx_ch_cfg_req for | |
2253 | * more info. | |
905c3047 | 2254 | */ |
68608b5e PU |
2255 | static int ti_sci_cmd_rm_udmap_tx_ch_cfg(const struct ti_sci_handle *handle, |
2256 | const struct ti_sci_msg_rm_udmap_tx_ch_cfg *params) | |
905c3047 | 2257 | { |
68608b5e PU |
2258 | struct ti_sci_msg_rm_udmap_tx_ch_cfg_req *req; |
2259 | struct ti_sci_msg_hdr *resp; | |
2260 | struct ti_sci_xfer *xfer; | |
905c3047 | 2261 | struct ti_sci_info *info; |
68608b5e PU |
2262 | struct device *dev; |
2263 | int ret = 0; | |
905c3047 | 2264 | |
68608b5e PU |
2265 | if (IS_ERR_OR_NULL(handle)) |
2266 | return -EINVAL; | |
2267 | ||
2268 | info = handle_to_ti_sci_info(handle); | |
2269 | dev = info->dev; | |
2270 | ||
2271 | xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_TX_CH_CFG, | |
2272 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2273 | sizeof(*req), sizeof(*resp)); | |
2274 | if (IS_ERR(xfer)) { | |
2275 | ret = PTR_ERR(xfer); | |
4c960505 | 2276 | dev_err(dev, "Message TX_CH_CFG alloc failed(%d)\n", ret); |
68608b5e PU |
2277 | return ret; |
2278 | } | |
2279 | req = (struct ti_sci_msg_rm_udmap_tx_ch_cfg_req *)xfer->xfer_buf; | |
2280 | req->valid_params = params->valid_params; | |
2281 | req->nav_id = params->nav_id; | |
2282 | req->index = params->index; | |
2283 | req->tx_pause_on_err = params->tx_pause_on_err; | |
2284 | req->tx_filt_einfo = params->tx_filt_einfo; | |
2285 | req->tx_filt_pswords = params->tx_filt_pswords; | |
2286 | req->tx_atype = params->tx_atype; | |
2287 | req->tx_chan_type = params->tx_chan_type; | |
2288 | req->tx_supr_tdpkt = params->tx_supr_tdpkt; | |
2289 | req->tx_fetch_size = params->tx_fetch_size; | |
2290 | req->tx_credit_count = params->tx_credit_count; | |
2291 | req->txcq_qnum = params->txcq_qnum; | |
2292 | req->tx_priority = params->tx_priority; | |
2293 | req->tx_qos = params->tx_qos; | |
2294 | req->tx_orderid = params->tx_orderid; | |
2295 | req->fdepth = params->fdepth; | |
2296 | req->tx_sched_priority = params->tx_sched_priority; | |
2297 | req->tx_burst_size = params->tx_burst_size; | |
1c552e08 | 2298 | req->tx_tdtype = params->tx_tdtype; |
ce1feed5 | 2299 | req->extended_ch_type = params->extended_ch_type; |
68608b5e PU |
2300 | |
2301 | ret = ti_sci_do_xfer(info, xfer); | |
2302 | if (ret) { | |
4c960505 | 2303 | dev_err(dev, "Mbox send TX_CH_CFG fail %d\n", ret); |
68608b5e PU |
2304 | goto fail; |
2305 | } | |
2306 | ||
2307 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2308 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2309 | ||
2310 | fail: | |
2311 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
4c960505 | 2312 | dev_dbg(dev, "TX_CH_CFG: chn %u ret:%u\n", params->index, ret); |
68608b5e PU |
2313 | return ret; |
2314 | } | |
2315 | ||
2316 | /** | |
2317 | * ti_sci_cmd_rm_udmap_rx_ch_cfg() - Configure a UDMAP RX channel | |
2318 | * @handle: Pointer to TI SCI handle. | |
2319 | * @params: Pointer to ti_sci_msg_rm_udmap_rx_ch_cfg RX channel config | |
2320 | * structure | |
2321 | * | |
2322 | * Return: 0 if all went well, else returns appropriate error value. | |
2323 | * | |
2324 | * See @ti_sci_msg_rm_udmap_rx_ch_cfg and @ti_sci_msg_rm_udmap_rx_ch_cfg_req for | |
2325 | * more info. | |
2326 | */ | |
2327 | static int ti_sci_cmd_rm_udmap_rx_ch_cfg(const struct ti_sci_handle *handle, | |
2328 | const struct ti_sci_msg_rm_udmap_rx_ch_cfg *params) | |
2329 | { | |
2330 | struct ti_sci_msg_rm_udmap_rx_ch_cfg_req *req; | |
2331 | struct ti_sci_msg_hdr *resp; | |
2332 | struct ti_sci_xfer *xfer; | |
2333 | struct ti_sci_info *info; | |
2334 | struct device *dev; | |
2335 | int ret = 0; | |
2336 | ||
2337 | if (IS_ERR_OR_NULL(handle)) | |
2338 | return -EINVAL; | |
2339 | ||
2340 | info = handle_to_ti_sci_info(handle); | |
2341 | dev = info->dev; | |
2342 | ||
2343 | xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_RX_CH_CFG, | |
2344 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2345 | sizeof(*req), sizeof(*resp)); | |
2346 | if (IS_ERR(xfer)) { | |
2347 | ret = PTR_ERR(xfer); | |
4c960505 | 2348 | dev_err(dev, "Message RX_CH_CFG alloc failed(%d)\n", ret); |
68608b5e PU |
2349 | return ret; |
2350 | } | |
2351 | req = (struct ti_sci_msg_rm_udmap_rx_ch_cfg_req *)xfer->xfer_buf; | |
2352 | req->valid_params = params->valid_params; | |
2353 | req->nav_id = params->nav_id; | |
2354 | req->index = params->index; | |
2355 | req->rx_fetch_size = params->rx_fetch_size; | |
2356 | req->rxcq_qnum = params->rxcq_qnum; | |
2357 | req->rx_priority = params->rx_priority; | |
2358 | req->rx_qos = params->rx_qos; | |
2359 | req->rx_orderid = params->rx_orderid; | |
2360 | req->rx_sched_priority = params->rx_sched_priority; | |
2361 | req->flowid_start = params->flowid_start; | |
2362 | req->flowid_cnt = params->flowid_cnt; | |
2363 | req->rx_pause_on_err = params->rx_pause_on_err; | |
2364 | req->rx_atype = params->rx_atype; | |
2365 | req->rx_chan_type = params->rx_chan_type; | |
2366 | req->rx_ignore_short = params->rx_ignore_short; | |
2367 | req->rx_ignore_long = params->rx_ignore_long; | |
2368 | req->rx_burst_size = params->rx_burst_size; | |
2369 | ||
2370 | ret = ti_sci_do_xfer(info, xfer); | |
2371 | if (ret) { | |
4c960505 | 2372 | dev_err(dev, "Mbox send RX_CH_CFG fail %d\n", ret); |
68608b5e PU |
2373 | goto fail; |
2374 | } | |
2375 | ||
2376 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2377 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2378 | ||
2379 | fail: | |
2380 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
4c960505 | 2381 | dev_dbg(dev, "RX_CH_CFG: chn %u ret:%d\n", params->index, ret); |
68608b5e PU |
2382 | return ret; |
2383 | } | |
2384 | ||
2385 | /** | |
2386 | * ti_sci_cmd_rm_udmap_rx_flow_cfg() - Configure UDMAP RX FLOW | |
2387 | * @handle: Pointer to TI SCI handle. | |
2388 | * @params: Pointer to ti_sci_msg_rm_udmap_flow_cfg RX FLOW config | |
2389 | * structure | |
2390 | * | |
2391 | * Return: 0 if all went well, else returns appropriate error value. | |
2392 | * | |
2393 | * See @ti_sci_msg_rm_udmap_flow_cfg and @ti_sci_msg_rm_udmap_flow_cfg_req for | |
2394 | * more info. | |
2395 | */ | |
2396 | static int ti_sci_cmd_rm_udmap_rx_flow_cfg(const struct ti_sci_handle *handle, | |
2397 | const struct ti_sci_msg_rm_udmap_flow_cfg *params) | |
2398 | { | |
2399 | struct ti_sci_msg_rm_udmap_flow_cfg_req *req; | |
2400 | struct ti_sci_msg_hdr *resp; | |
2401 | struct ti_sci_xfer *xfer; | |
2402 | struct ti_sci_info *info; | |
2403 | struct device *dev; | |
2404 | int ret = 0; | |
2405 | ||
2406 | if (IS_ERR_OR_NULL(handle)) | |
2407 | return -EINVAL; | |
2408 | ||
2409 | info = handle_to_ti_sci_info(handle); | |
2410 | dev = info->dev; | |
2411 | ||
2412 | xfer = ti_sci_get_one_xfer(info, TISCI_MSG_RM_UDMAP_FLOW_CFG, | |
2413 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2414 | sizeof(*req), sizeof(*resp)); | |
2415 | if (IS_ERR(xfer)) { | |
2416 | ret = PTR_ERR(xfer); | |
2417 | dev_err(dev, "RX_FL_CFG: Message alloc failed(%d)\n", ret); | |
2418 | return ret; | |
2419 | } | |
2420 | req = (struct ti_sci_msg_rm_udmap_flow_cfg_req *)xfer->xfer_buf; | |
2421 | req->valid_params = params->valid_params; | |
2422 | req->nav_id = params->nav_id; | |
2423 | req->flow_index = params->flow_index; | |
2424 | req->rx_einfo_present = params->rx_einfo_present; | |
2425 | req->rx_psinfo_present = params->rx_psinfo_present; | |
2426 | req->rx_error_handling = params->rx_error_handling; | |
2427 | req->rx_desc_type = params->rx_desc_type; | |
2428 | req->rx_sop_offset = params->rx_sop_offset; | |
2429 | req->rx_dest_qnum = params->rx_dest_qnum; | |
2430 | req->rx_src_tag_hi = params->rx_src_tag_hi; | |
2431 | req->rx_src_tag_lo = params->rx_src_tag_lo; | |
2432 | req->rx_dest_tag_hi = params->rx_dest_tag_hi; | |
2433 | req->rx_dest_tag_lo = params->rx_dest_tag_lo; | |
2434 | req->rx_src_tag_hi_sel = params->rx_src_tag_hi_sel; | |
2435 | req->rx_src_tag_lo_sel = params->rx_src_tag_lo_sel; | |
2436 | req->rx_dest_tag_hi_sel = params->rx_dest_tag_hi_sel; | |
2437 | req->rx_dest_tag_lo_sel = params->rx_dest_tag_lo_sel; | |
2438 | req->rx_fdq0_sz0_qnum = params->rx_fdq0_sz0_qnum; | |
2439 | req->rx_fdq1_qnum = params->rx_fdq1_qnum; | |
2440 | req->rx_fdq2_qnum = params->rx_fdq2_qnum; | |
2441 | req->rx_fdq3_qnum = params->rx_fdq3_qnum; | |
2442 | req->rx_ps_location = params->rx_ps_location; | |
2443 | ||
2444 | ret = ti_sci_do_xfer(info, xfer); | |
2445 | if (ret) { | |
2446 | dev_err(dev, "RX_FL_CFG: Mbox send fail %d\n", ret); | |
2447 | goto fail; | |
2448 | } | |
2449 | ||
2450 | resp = (struct ti_sci_msg_hdr *)xfer->xfer_buf; | |
2451 | ret = ti_sci_is_response_ack(resp) ? 0 : -EINVAL; | |
2452 | ||
2453 | fail: | |
2454 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2455 | dev_dbg(info->dev, "RX_FL_CFG: %u ret:%d\n", params->flow_index, ret); | |
2456 | return ret; | |
2457 | } | |
2458 | ||
1e407f33 SA |
2459 | /** |
2460 | * ti_sci_cmd_proc_request() - Command to request a physical processor control | |
2461 | * @handle: Pointer to TI SCI handle | |
2462 | * @proc_id: Processor ID this request is for | |
2463 | * | |
2464 | * Return: 0 if all went well, else returns appropriate error value. | |
2465 | */ | |
2466 | static int ti_sci_cmd_proc_request(const struct ti_sci_handle *handle, | |
2467 | u8 proc_id) | |
2468 | { | |
2469 | struct ti_sci_msg_req_proc_request *req; | |
2470 | struct ti_sci_msg_hdr *resp; | |
2471 | struct ti_sci_info *info; | |
2472 | struct ti_sci_xfer *xfer; | |
2473 | struct device *dev; | |
2474 | int ret = 0; | |
2475 | ||
2476 | if (!handle) | |
2477 | return -EINVAL; | |
2478 | if (IS_ERR(handle)) | |
2479 | return PTR_ERR(handle); | |
2480 | ||
2481 | info = handle_to_ti_sci_info(handle); | |
2482 | dev = info->dev; | |
2483 | ||
2484 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_REQUEST, | |
2485 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2486 | sizeof(*req), sizeof(*resp)); | |
2487 | if (IS_ERR(xfer)) { | |
2488 | ret = PTR_ERR(xfer); | |
2489 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2490 | return ret; | |
2491 | } | |
2492 | req = (struct ti_sci_msg_req_proc_request *)xfer->xfer_buf; | |
2493 | req->processor_id = proc_id; | |
2494 | ||
2495 | ret = ti_sci_do_xfer(info, xfer); | |
2496 | if (ret) { | |
2497 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2498 | goto fail; | |
2499 | } | |
2500 | ||
2501 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2502 | ||
2503 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2504 | ||
2505 | fail: | |
2506 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2507 | ||
2508 | return ret; | |
2509 | } | |
2510 | ||
2511 | /** | |
2512 | * ti_sci_cmd_proc_release() - Command to release a physical processor control | |
2513 | * @handle: Pointer to TI SCI handle | |
2514 | * @proc_id: Processor ID this request is for | |
2515 | * | |
2516 | * Return: 0 if all went well, else returns appropriate error value. | |
2517 | */ | |
2518 | static int ti_sci_cmd_proc_release(const struct ti_sci_handle *handle, | |
2519 | u8 proc_id) | |
2520 | { | |
2521 | struct ti_sci_msg_req_proc_release *req; | |
2522 | struct ti_sci_msg_hdr *resp; | |
2523 | struct ti_sci_info *info; | |
2524 | struct ti_sci_xfer *xfer; | |
2525 | struct device *dev; | |
2526 | int ret = 0; | |
2527 | ||
2528 | if (!handle) | |
2529 | return -EINVAL; | |
2530 | if (IS_ERR(handle)) | |
2531 | return PTR_ERR(handle); | |
2532 | ||
2533 | info = handle_to_ti_sci_info(handle); | |
2534 | dev = info->dev; | |
2535 | ||
2536 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_RELEASE, | |
2537 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2538 | sizeof(*req), sizeof(*resp)); | |
2539 | if (IS_ERR(xfer)) { | |
2540 | ret = PTR_ERR(xfer); | |
2541 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2542 | return ret; | |
2543 | } | |
2544 | req = (struct ti_sci_msg_req_proc_release *)xfer->xfer_buf; | |
2545 | req->processor_id = proc_id; | |
2546 | ||
2547 | ret = ti_sci_do_xfer(info, xfer); | |
2548 | if (ret) { | |
2549 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2550 | goto fail; | |
2551 | } | |
2552 | ||
2553 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2554 | ||
2555 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2556 | ||
2557 | fail: | |
2558 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2559 | ||
2560 | return ret; | |
2561 | } | |
2562 | ||
2563 | /** | |
2564 | * ti_sci_cmd_proc_handover() - Command to handover a physical processor | |
2565 | * control to a host in the processor's access | |
2566 | * control list. | |
2567 | * @handle: Pointer to TI SCI handle | |
2568 | * @proc_id: Processor ID this request is for | |
2569 | * @host_id: Host ID to get the control of the processor | |
2570 | * | |
2571 | * Return: 0 if all went well, else returns appropriate error value. | |
2572 | */ | |
2573 | static int ti_sci_cmd_proc_handover(const struct ti_sci_handle *handle, | |
2574 | u8 proc_id, u8 host_id) | |
2575 | { | |
2576 | struct ti_sci_msg_req_proc_handover *req; | |
2577 | struct ti_sci_msg_hdr *resp; | |
2578 | struct ti_sci_info *info; | |
2579 | struct ti_sci_xfer *xfer; | |
2580 | struct device *dev; | |
2581 | int ret = 0; | |
2582 | ||
2583 | if (!handle) | |
2584 | return -EINVAL; | |
2585 | if (IS_ERR(handle)) | |
2586 | return PTR_ERR(handle); | |
2587 | ||
2588 | info = handle_to_ti_sci_info(handle); | |
2589 | dev = info->dev; | |
2590 | ||
2591 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_HANDOVER, | |
2592 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2593 | sizeof(*req), sizeof(*resp)); | |
2594 | if (IS_ERR(xfer)) { | |
2595 | ret = PTR_ERR(xfer); | |
2596 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2597 | return ret; | |
2598 | } | |
2599 | req = (struct ti_sci_msg_req_proc_handover *)xfer->xfer_buf; | |
2600 | req->processor_id = proc_id; | |
2601 | req->host_id = host_id; | |
2602 | ||
2603 | ret = ti_sci_do_xfer(info, xfer); | |
2604 | if (ret) { | |
2605 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2606 | goto fail; | |
2607 | } | |
2608 | ||
2609 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2610 | ||
2611 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2612 | ||
2613 | fail: | |
2614 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2615 | ||
2616 | return ret; | |
2617 | } | |
2618 | ||
2619 | /** | |
2620 | * ti_sci_cmd_proc_set_config() - Command to set the processor boot | |
2621 | * configuration flags | |
2622 | * @handle: Pointer to TI SCI handle | |
2623 | * @proc_id: Processor ID this request is for | |
2624 | * @config_flags_set: Configuration flags to be set | |
2625 | * @config_flags_clear: Configuration flags to be cleared. | |
2626 | * | |
2627 | * Return: 0 if all went well, else returns appropriate error value. | |
2628 | */ | |
2629 | static int ti_sci_cmd_proc_set_config(const struct ti_sci_handle *handle, | |
2630 | u8 proc_id, u64 bootvector, | |
2631 | u32 config_flags_set, | |
2632 | u32 config_flags_clear) | |
2633 | { | |
2634 | struct ti_sci_msg_req_set_config *req; | |
2635 | struct ti_sci_msg_hdr *resp; | |
2636 | struct ti_sci_info *info; | |
2637 | struct ti_sci_xfer *xfer; | |
2638 | struct device *dev; | |
2639 | int ret = 0; | |
2640 | ||
2641 | if (!handle) | |
2642 | return -EINVAL; | |
2643 | if (IS_ERR(handle)) | |
2644 | return PTR_ERR(handle); | |
2645 | ||
2646 | info = handle_to_ti_sci_info(handle); | |
2647 | dev = info->dev; | |
2648 | ||
2649 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CONFIG, | |
2650 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2651 | sizeof(*req), sizeof(*resp)); | |
2652 | if (IS_ERR(xfer)) { | |
2653 | ret = PTR_ERR(xfer); | |
2654 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2655 | return ret; | |
2656 | } | |
2657 | req = (struct ti_sci_msg_req_set_config *)xfer->xfer_buf; | |
2658 | req->processor_id = proc_id; | |
2659 | req->bootvector_low = bootvector & TI_SCI_ADDR_LOW_MASK; | |
2660 | req->bootvector_high = (bootvector & TI_SCI_ADDR_HIGH_MASK) >> | |
2661 | TI_SCI_ADDR_HIGH_SHIFT; | |
2662 | req->config_flags_set = config_flags_set; | |
2663 | req->config_flags_clear = config_flags_clear; | |
2664 | ||
2665 | ret = ti_sci_do_xfer(info, xfer); | |
2666 | if (ret) { | |
2667 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2668 | goto fail; | |
2669 | } | |
2670 | ||
2671 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2672 | ||
2673 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2674 | ||
2675 | fail: | |
2676 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2677 | ||
2678 | return ret; | |
2679 | } | |
2680 | ||
2681 | /** | |
2682 | * ti_sci_cmd_proc_set_control() - Command to set the processor boot | |
2683 | * control flags | |
2684 | * @handle: Pointer to TI SCI handle | |
2685 | * @proc_id: Processor ID this request is for | |
2686 | * @control_flags_set: Control flags to be set | |
2687 | * @control_flags_clear: Control flags to be cleared | |
2688 | * | |
2689 | * Return: 0 if all went well, else returns appropriate error value. | |
2690 | */ | |
2691 | static int ti_sci_cmd_proc_set_control(const struct ti_sci_handle *handle, | |
2692 | u8 proc_id, u32 control_flags_set, | |
2693 | u32 control_flags_clear) | |
2694 | { | |
2695 | struct ti_sci_msg_req_set_ctrl *req; | |
2696 | struct ti_sci_msg_hdr *resp; | |
2697 | struct ti_sci_info *info; | |
2698 | struct ti_sci_xfer *xfer; | |
2699 | struct device *dev; | |
2700 | int ret = 0; | |
2701 | ||
2702 | if (!handle) | |
2703 | return -EINVAL; | |
2704 | if (IS_ERR(handle)) | |
2705 | return PTR_ERR(handle); | |
2706 | ||
2707 | info = handle_to_ti_sci_info(handle); | |
2708 | dev = info->dev; | |
2709 | ||
2710 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CTRL, | |
2711 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2712 | sizeof(*req), sizeof(*resp)); | |
2713 | if (IS_ERR(xfer)) { | |
2714 | ret = PTR_ERR(xfer); | |
2715 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2716 | return ret; | |
2717 | } | |
2718 | req = (struct ti_sci_msg_req_set_ctrl *)xfer->xfer_buf; | |
2719 | req->processor_id = proc_id; | |
2720 | req->control_flags_set = control_flags_set; | |
2721 | req->control_flags_clear = control_flags_clear; | |
2722 | ||
2723 | ret = ti_sci_do_xfer(info, xfer); | |
2724 | if (ret) { | |
2725 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2726 | goto fail; | |
2727 | } | |
2728 | ||
2729 | resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf; | |
2730 | ||
2731 | ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV; | |
2732 | ||
2733 | fail: | |
2734 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2735 | ||
2736 | return ret; | |
2737 | } | |
2738 | ||
2739 | /** | |
2740 | * ti_sci_cmd_get_boot_status() - Command to get the processor boot status | |
2741 | * @handle: Pointer to TI SCI handle | |
2742 | * @proc_id: Processor ID this request is for | |
2743 | * | |
2744 | * Return: 0 if all went well, else returns appropriate error value. | |
2745 | */ | |
2746 | static int ti_sci_cmd_proc_get_status(const struct ti_sci_handle *handle, | |
2747 | u8 proc_id, u64 *bv, u32 *cfg_flags, | |
2748 | u32 *ctrl_flags, u32 *sts_flags) | |
2749 | { | |
2750 | struct ti_sci_msg_resp_get_status *resp; | |
2751 | struct ti_sci_msg_req_get_status *req; | |
2752 | struct ti_sci_info *info; | |
2753 | struct ti_sci_xfer *xfer; | |
2754 | struct device *dev; | |
2755 | int ret = 0; | |
2756 | ||
2757 | if (!handle) | |
2758 | return -EINVAL; | |
2759 | if (IS_ERR(handle)) | |
2760 | return PTR_ERR(handle); | |
2761 | ||
2762 | info = handle_to_ti_sci_info(handle); | |
2763 | dev = info->dev; | |
2764 | ||
2765 | xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_STATUS, | |
2766 | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED, | |
2767 | sizeof(*req), sizeof(*resp)); | |
2768 | if (IS_ERR(xfer)) { | |
2769 | ret = PTR_ERR(xfer); | |
2770 | dev_err(dev, "Message alloc failed(%d)\n", ret); | |
2771 | return ret; | |
2772 | } | |
2773 | req = (struct ti_sci_msg_req_get_status *)xfer->xfer_buf; | |
2774 | req->processor_id = proc_id; | |
2775 | ||
2776 | ret = ti_sci_do_xfer(info, xfer); | |
2777 | if (ret) { | |
2778 | dev_err(dev, "Mbox send fail %d\n", ret); | |
2779 | goto fail; | |
2780 | } | |
2781 | ||
2782 | resp = (struct ti_sci_msg_resp_get_status *)xfer->tx_message.buf; | |
2783 | ||
2784 | if (!ti_sci_is_response_ack(resp)) { | |
2785 | ret = -ENODEV; | |
2786 | } else { | |
2787 | *bv = (resp->bootvector_low & TI_SCI_ADDR_LOW_MASK) | | |
2788 | (((u64)resp->bootvector_high << TI_SCI_ADDR_HIGH_SHIFT) & | |
2789 | TI_SCI_ADDR_HIGH_MASK); | |
2790 | *cfg_flags = resp->config_flags; | |
2791 | *ctrl_flags = resp->control_flags; | |
2792 | *sts_flags = resp->status_flags; | |
2793 | } | |
2794 | ||
2795 | fail: | |
2796 | ti_sci_put_one_xfer(&info->minfo, xfer); | |
2797 | ||
2798 | return ret; | |
2799 | } | |
2800 | ||
9e7d756d NM |
2801 | /* |
2802 | * ti_sci_setup_ops() - Setup the operations structures | |
2803 | * @info: pointer to TISCI pointer | |
2804 | */ | |
2805 | static void ti_sci_setup_ops(struct ti_sci_info *info) | |
2806 | { | |
2807 | struct ti_sci_ops *ops = &info->handle.ops; | |
912cffb4 | 2808 | struct ti_sci_core_ops *core_ops = &ops->core_ops; |
9e7d756d | 2809 | struct ti_sci_dev_ops *dops = &ops->dev_ops; |
9f723220 | 2810 | struct ti_sci_clk_ops *cops = &ops->clk_ops; |
9c19fb68 | 2811 | struct ti_sci_rm_core_ops *rm_core_ops = &ops->rm_core_ops; |
997b001f | 2812 | struct ti_sci_rm_irq_ops *iops = &ops->rm_irq_ops; |
68608b5e PU |
2813 | struct ti_sci_rm_ringacc_ops *rops = &ops->rm_ring_ops; |
2814 | struct ti_sci_rm_psil_ops *psilops = &ops->rm_psil_ops; | |
2815 | struct ti_sci_rm_udmap_ops *udmap_ops = &ops->rm_udmap_ops; | |
1e407f33 | 2816 | struct ti_sci_proc_ops *pops = &ops->proc_ops; |
9e7d756d | 2817 | |
912cffb4 NM |
2818 | core_ops->reboot_device = ti_sci_cmd_core_reboot; |
2819 | ||
9e7d756d | 2820 | dops->get_device = ti_sci_cmd_get_device; |
45b659ee | 2821 | dops->get_device_exclusive = ti_sci_cmd_get_device_exclusive; |
9e7d756d | 2822 | dops->idle_device = ti_sci_cmd_idle_device; |
45b659ee | 2823 | dops->idle_device_exclusive = ti_sci_cmd_idle_device_exclusive; |
9e7d756d NM |
2824 | dops->put_device = ti_sci_cmd_put_device; |
2825 | ||
2826 | dops->is_valid = ti_sci_cmd_dev_is_valid; | |
2827 | dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt; | |
2828 | dops->is_idle = ti_sci_cmd_dev_is_idle; | |
2829 | dops->is_stop = ti_sci_cmd_dev_is_stop; | |
2830 | dops->is_on = ti_sci_cmd_dev_is_on; | |
2831 | dops->is_transitioning = ti_sci_cmd_dev_is_trans; | |
2832 | dops->set_device_resets = ti_sci_cmd_set_device_resets; | |
2833 | dops->get_device_resets = ti_sci_cmd_get_device_resets; | |
9f723220 NM |
2834 | |
2835 | cops->get_clock = ti_sci_cmd_get_clock; | |
2836 | cops->idle_clock = ti_sci_cmd_idle_clock; | |
2837 | cops->put_clock = ti_sci_cmd_put_clock; | |
2838 | cops->is_auto = ti_sci_cmd_clk_is_auto; | |
2839 | cops->is_on = ti_sci_cmd_clk_is_on; | |
2840 | cops->is_off = ti_sci_cmd_clk_is_off; | |
2841 | ||
2842 | cops->set_parent = ti_sci_cmd_clk_set_parent; | |
2843 | cops->get_parent = ti_sci_cmd_clk_get_parent; | |
2844 | cops->get_num_parents = ti_sci_cmd_clk_get_num_parents; | |
2845 | ||
2846 | cops->get_best_match_freq = ti_sci_cmd_clk_get_match_freq; | |
2847 | cops->set_freq = ti_sci_cmd_clk_set_freq; | |
2848 | cops->get_freq = ti_sci_cmd_clk_get_freq; | |
9c19fb68 LV |
2849 | |
2850 | rm_core_ops->get_range = ti_sci_cmd_get_resource_range; | |
2851 | rm_core_ops->get_range_from_shost = | |
2852 | ti_sci_cmd_get_resource_range_from_shost; | |
997b001f LV |
2853 | |
2854 | iops->set_irq = ti_sci_cmd_set_irq; | |
2855 | iops->set_event_map = ti_sci_cmd_set_event_map; | |
2856 | iops->free_irq = ti_sci_cmd_free_irq; | |
2857 | iops->free_event_map = ti_sci_cmd_free_event_map; | |
68608b5e | 2858 | |
3c201753 | 2859 | rops->set_cfg = ti_sci_cmd_rm_ring_cfg; |
68608b5e PU |
2860 | |
2861 | psilops->pair = ti_sci_cmd_rm_psil_pair; | |
2862 | psilops->unpair = ti_sci_cmd_rm_psil_unpair; | |
2863 | ||
2864 | udmap_ops->tx_ch_cfg = ti_sci_cmd_rm_udmap_tx_ch_cfg; | |
2865 | udmap_ops->rx_ch_cfg = ti_sci_cmd_rm_udmap_rx_ch_cfg; | |
2866 | udmap_ops->rx_flow_cfg = ti_sci_cmd_rm_udmap_rx_flow_cfg; | |
1e407f33 SA |
2867 | |
2868 | pops->request = ti_sci_cmd_proc_request; | |
2869 | pops->release = ti_sci_cmd_proc_release; | |
2870 | pops->handover = ti_sci_cmd_proc_handover; | |
2871 | pops->set_config = ti_sci_cmd_proc_set_config; | |
2872 | pops->set_control = ti_sci_cmd_proc_set_control; | |
2873 | pops->get_status = ti_sci_cmd_proc_get_status; | |
9e7d756d NM |
2874 | } |
2875 | ||
aa276781 NM |
2876 | /** |
2877 | * ti_sci_get_handle() - Get the TI SCI handle for a device | |
2878 | * @dev: Pointer to device for which we want SCI handle | |
2879 | * | |
2880 | * NOTE: The function does not track individual clients of the framework | |
2881 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2882 | * ti_sci_put_handle must be balanced with successful ti_sci_get_handle | |
2883 | * Return: pointer to handle if successful, else: | |
2884 | * -EPROBE_DEFER if the instance is not ready | |
2885 | * -ENODEV if the required node handler is missing | |
2886 | * -EINVAL if invalid conditions are encountered. | |
2887 | */ | |
2888 | const struct ti_sci_handle *ti_sci_get_handle(struct device *dev) | |
2889 | { | |
2890 | struct device_node *ti_sci_np; | |
2891 | struct list_head *p; | |
2892 | struct ti_sci_handle *handle = NULL; | |
2893 | struct ti_sci_info *info; | |
2894 | ||
2895 | if (!dev) { | |
2896 | pr_err("I need a device pointer\n"); | |
2897 | return ERR_PTR(-EINVAL); | |
2898 | } | |
2899 | ti_sci_np = of_get_parent(dev->of_node); | |
2900 | if (!ti_sci_np) { | |
2901 | dev_err(dev, "No OF information\n"); | |
2902 | return ERR_PTR(-EINVAL); | |
2903 | } | |
2904 | ||
2905 | mutex_lock(&ti_sci_list_mutex); | |
2906 | list_for_each(p, &ti_sci_list) { | |
2907 | info = list_entry(p, struct ti_sci_info, node); | |
2908 | if (ti_sci_np == info->dev->of_node) { | |
2909 | handle = &info->handle; | |
2910 | info->users++; | |
2911 | break; | |
2912 | } | |
2913 | } | |
2914 | mutex_unlock(&ti_sci_list_mutex); | |
2915 | of_node_put(ti_sci_np); | |
2916 | ||
2917 | if (!handle) | |
2918 | return ERR_PTR(-EPROBE_DEFER); | |
2919 | ||
2920 | return handle; | |
2921 | } | |
2922 | EXPORT_SYMBOL_GPL(ti_sci_get_handle); | |
2923 | ||
2924 | /** | |
2925 | * ti_sci_put_handle() - Release the handle acquired by ti_sci_get_handle | |
2926 | * @handle: Handle acquired by ti_sci_get_handle | |
2927 | * | |
2928 | * NOTE: The function does not track individual clients of the framework | |
2929 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2930 | * ti_sci_put_handle must be balanced with successful ti_sci_get_handle | |
2931 | * | |
2932 | * Return: 0 is successfully released | |
2933 | * if an error pointer was passed, it returns the error value back, | |
2934 | * if null was passed, it returns -EINVAL; | |
2935 | */ | |
2936 | int ti_sci_put_handle(const struct ti_sci_handle *handle) | |
2937 | { | |
2938 | struct ti_sci_info *info; | |
2939 | ||
2940 | if (IS_ERR(handle)) | |
2941 | return PTR_ERR(handle); | |
2942 | if (!handle) | |
2943 | return -EINVAL; | |
2944 | ||
2945 | info = handle_to_ti_sci_info(handle); | |
2946 | mutex_lock(&ti_sci_list_mutex); | |
2947 | if (!WARN_ON(!info->users)) | |
2948 | info->users--; | |
2949 | mutex_unlock(&ti_sci_list_mutex); | |
2950 | ||
2951 | return 0; | |
2952 | } | |
2953 | EXPORT_SYMBOL_GPL(ti_sci_put_handle); | |
2954 | ||
2955 | static void devm_ti_sci_release(struct device *dev, void *res) | |
2956 | { | |
2957 | const struct ti_sci_handle **ptr = res; | |
2958 | const struct ti_sci_handle *handle = *ptr; | |
2959 | int ret; | |
2960 | ||
2961 | ret = ti_sci_put_handle(handle); | |
2962 | if (ret) | |
2963 | dev_err(dev, "failed to put handle %d\n", ret); | |
2964 | } | |
2965 | ||
2966 | /** | |
2967 | * devm_ti_sci_get_handle() - Managed get handle | |
2968 | * @dev: device for which we want SCI handle for. | |
2969 | * | |
2970 | * NOTE: This releases the handle once the device resources are | |
2971 | * no longer needed. MUST NOT BE released with ti_sci_put_handle. | |
2972 | * The function does not track individual clients of the framework | |
2973 | * and is expected to be maintained by caller of TI SCI protocol library. | |
2974 | * | |
2975 | * Return: 0 if all went fine, else corresponding error. | |
2976 | */ | |
2977 | const struct ti_sci_handle *devm_ti_sci_get_handle(struct device *dev) | |
2978 | { | |
2979 | const struct ti_sci_handle **ptr; | |
2980 | const struct ti_sci_handle *handle; | |
2981 | ||
2982 | ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); | |
2983 | if (!ptr) | |
2984 | return ERR_PTR(-ENOMEM); | |
2985 | handle = ti_sci_get_handle(dev); | |
2986 | ||
2987 | if (!IS_ERR(handle)) { | |
2988 | *ptr = handle; | |
2989 | devres_add(dev, ptr); | |
2990 | } else { | |
2991 | devres_free(ptr); | |
2992 | } | |
2993 | ||
2994 | return handle; | |
2995 | } | |
2996 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_handle); | |
2997 | ||
905c3047 GS |
2998 | /** |
2999 | * ti_sci_get_by_phandle() - Get the TI SCI handle using DT phandle | |
3000 | * @np: device node | |
3001 | * @property: property name containing phandle on TISCI node | |
3002 | * | |
3003 | * NOTE: The function does not track individual clients of the framework | |
3004 | * and is expected to be maintained by caller of TI SCI protocol library. | |
3005 | * ti_sci_put_handle must be balanced with successful ti_sci_get_by_phandle | |
3006 | * Return: pointer to handle if successful, else: | |
3007 | * -EPROBE_DEFER if the instance is not ready | |
3008 | * -ENODEV if the required node handler is missing | |
3009 | * -EINVAL if invalid conditions are encountered. | |
3010 | */ | |
3011 | const struct ti_sci_handle *ti_sci_get_by_phandle(struct device_node *np, | |
3012 | const char *property) | |
3013 | { | |
3014 | struct ti_sci_handle *handle = NULL; | |
3015 | struct device_node *ti_sci_np; | |
3016 | struct ti_sci_info *info; | |
3017 | struct list_head *p; | |
3018 | ||
3019 | if (!np) { | |
3020 | pr_err("I need a device pointer\n"); | |
3021 | return ERR_PTR(-EINVAL); | |
3022 | } | |
3023 | ||
3024 | ti_sci_np = of_parse_phandle(np, property, 0); | |
3025 | if (!ti_sci_np) | |
3026 | return ERR_PTR(-ENODEV); | |
3027 | ||
3028 | mutex_lock(&ti_sci_list_mutex); | |
3029 | list_for_each(p, &ti_sci_list) { | |
3030 | info = list_entry(p, struct ti_sci_info, node); | |
3031 | if (ti_sci_np == info->dev->of_node) { | |
3032 | handle = &info->handle; | |
3033 | info->users++; | |
3034 | break; | |
3035 | } | |
3036 | } | |
3037 | mutex_unlock(&ti_sci_list_mutex); | |
3038 | of_node_put(ti_sci_np); | |
3039 | ||
3040 | if (!handle) | |
3041 | return ERR_PTR(-EPROBE_DEFER); | |
3042 | ||
3043 | return handle; | |
3044 | } | |
3045 | EXPORT_SYMBOL_GPL(ti_sci_get_by_phandle); | |
3046 | ||
3047 | /** | |
3048 | * devm_ti_sci_get_by_phandle() - Managed get handle using phandle | |
3049 | * @dev: Device pointer requesting TISCI handle | |
3050 | * @property: property name containing phandle on TISCI node | |
3051 | * | |
3052 | * NOTE: This releases the handle once the device resources are | |
3053 | * no longer needed. MUST NOT BE released with ti_sci_put_handle. | |
3054 | * The function does not track individual clients of the framework | |
3055 | * and is expected to be maintained by caller of TI SCI protocol library. | |
3056 | * | |
3057 | * Return: 0 if all went fine, else corresponding error. | |
3058 | */ | |
3059 | const struct ti_sci_handle *devm_ti_sci_get_by_phandle(struct device *dev, | |
3060 | const char *property) | |
3061 | { | |
3062 | const struct ti_sci_handle *handle; | |
3063 | const struct ti_sci_handle **ptr; | |
3064 | ||
3065 | ptr = devres_alloc(devm_ti_sci_release, sizeof(*ptr), GFP_KERNEL); | |
3066 | if (!ptr) | |
3067 | return ERR_PTR(-ENOMEM); | |
3068 | handle = ti_sci_get_by_phandle(dev_of_node(dev), property); | |
3069 | ||
3070 | if (!IS_ERR(handle)) { | |
3071 | *ptr = handle; | |
3072 | devres_add(dev, ptr); | |
3073 | } else { | |
3074 | devres_free(ptr); | |
3075 | } | |
3076 | ||
3077 | return handle; | |
3078 | } | |
3079 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_by_phandle); | |
3080 | ||
032a1ec5 LV |
3081 | /** |
3082 | * ti_sci_get_free_resource() - Get a free resource from TISCI resource. | |
3083 | * @res: Pointer to the TISCI resource | |
3084 | * | |
3085 | * Return: resource num if all went ok else TI_SCI_RESOURCE_NULL. | |
3086 | */ | |
3087 | u16 ti_sci_get_free_resource(struct ti_sci_resource *res) | |
3088 | { | |
3089 | unsigned long flags; | |
3090 | u16 set, free_bit; | |
3091 | ||
3092 | raw_spin_lock_irqsave(&res->lock, flags); | |
3093 | for (set = 0; set < res->sets; set++) { | |
519c5c0c PU |
3094 | struct ti_sci_resource_desc *desc = &res->desc[set]; |
3095 | int res_count = desc->num + desc->num_sec; | |
3096 | ||
3097 | free_bit = find_first_zero_bit(desc->res_map, res_count); | |
3098 | if (free_bit != res_count) { | |
3099 | set_bit(free_bit, desc->res_map); | |
032a1ec5 | 3100 | raw_spin_unlock_irqrestore(&res->lock, flags); |
519c5c0c PU |
3101 | |
3102 | if (desc->num && free_bit < desc->num) | |
3103 | return desc->start + free_bit; | |
3104 | else | |
3105 | return desc->start_sec + free_bit; | |
032a1ec5 LV |
3106 | } |
3107 | } | |
3108 | raw_spin_unlock_irqrestore(&res->lock, flags); | |
3109 | ||
3110 | return TI_SCI_RESOURCE_NULL; | |
3111 | } | |
3112 | EXPORT_SYMBOL_GPL(ti_sci_get_free_resource); | |
3113 | ||
3114 | /** | |
3115 | * ti_sci_release_resource() - Release a resource from TISCI resource. | |
3116 | * @res: Pointer to the TISCI resource | |
3117 | * @id: Resource id to be released. | |
3118 | */ | |
3119 | void ti_sci_release_resource(struct ti_sci_resource *res, u16 id) | |
3120 | { | |
3121 | unsigned long flags; | |
3122 | u16 set; | |
3123 | ||
3124 | raw_spin_lock_irqsave(&res->lock, flags); | |
3125 | for (set = 0; set < res->sets; set++) { | |
519c5c0c PU |
3126 | struct ti_sci_resource_desc *desc = &res->desc[set]; |
3127 | ||
3128 | if (desc->num && desc->start <= id && | |
3129 | (desc->start + desc->num) > id) | |
3130 | clear_bit(id - desc->start, desc->res_map); | |
3131 | else if (desc->num_sec && desc->start_sec <= id && | |
3132 | (desc->start_sec + desc->num_sec) > id) | |
3133 | clear_bit(id - desc->start_sec, desc->res_map); | |
032a1ec5 LV |
3134 | } |
3135 | raw_spin_unlock_irqrestore(&res->lock, flags); | |
3136 | } | |
3137 | EXPORT_SYMBOL_GPL(ti_sci_release_resource); | |
3138 | ||
3139 | /** | |
3140 | * ti_sci_get_num_resources() - Get the number of resources in TISCI resource | |
3141 | * @res: Pointer to the TISCI resource | |
3142 | * | |
3143 | * Return: Total number of available resources. | |
3144 | */ | |
3145 | u32 ti_sci_get_num_resources(struct ti_sci_resource *res) | |
3146 | { | |
3147 | u32 set, count = 0; | |
3148 | ||
3149 | for (set = 0; set < res->sets; set++) | |
519c5c0c | 3150 | count += res->desc[set].num + res->desc[set].num_sec; |
032a1ec5 LV |
3151 | |
3152 | return count; | |
3153 | } | |
3154 | EXPORT_SYMBOL_GPL(ti_sci_get_num_resources); | |
3155 | ||
3156 | /** | |
53bf2b0e | 3157 | * devm_ti_sci_get_resource_sets() - Get a TISCI resources assigned to a device |
032a1ec5 LV |
3158 | * @handle: TISCI handle |
3159 | * @dev: Device pointer to which the resource is assigned | |
3160 | * @dev_id: TISCI device id to which the resource is assigned | |
53bf2b0e LV |
3161 | * @sub_types: Array of sub_types assigned corresponding to device |
3162 | * @sets: Number of sub_types | |
032a1ec5 LV |
3163 | * |
3164 | * Return: Pointer to ti_sci_resource if all went well else appropriate | |
3165 | * error pointer. | |
3166 | */ | |
53bf2b0e LV |
3167 | static struct ti_sci_resource * |
3168 | devm_ti_sci_get_resource_sets(const struct ti_sci_handle *handle, | |
3169 | struct device *dev, u32 dev_id, u32 *sub_types, | |
3170 | u32 sets) | |
032a1ec5 LV |
3171 | { |
3172 | struct ti_sci_resource *res; | |
fa42da11 | 3173 | bool valid_set = false; |
519c5c0c | 3174 | int i, ret, res_count; |
032a1ec5 LV |
3175 | |
3176 | res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL); | |
3177 | if (!res) | |
3178 | return ERR_PTR(-ENOMEM); | |
3179 | ||
53bf2b0e | 3180 | res->sets = sets; |
032a1ec5 LV |
3181 | res->desc = devm_kcalloc(dev, res->sets, sizeof(*res->desc), |
3182 | GFP_KERNEL); | |
3183 | if (!res->desc) | |
3184 | return ERR_PTR(-ENOMEM); | |
3185 | ||
3186 | for (i = 0; i < res->sets; i++) { | |
032a1ec5 | 3187 | ret = handle->ops.rm_core_ops.get_range(handle, dev_id, |
53bf2b0e | 3188 | sub_types[i], |
967a020b | 3189 | &res->desc[i]); |
032a1ec5 | 3190 | if (ret) { |
fa42da11 | 3191 | dev_dbg(dev, "dev = %d subtype %d not allocated for this host\n", |
53bf2b0e | 3192 | dev_id, sub_types[i]); |
519c5c0c | 3193 | memset(&res->desc[i], 0, sizeof(res->desc[i])); |
fa42da11 | 3194 | continue; |
032a1ec5 LV |
3195 | } |
3196 | ||
519c5c0c | 3197 | dev_dbg(dev, "dev/sub_type: %d/%d, start/num: %d/%d | %d/%d\n", |
53bf2b0e | 3198 | dev_id, sub_types[i], res->desc[i].start, |
519c5c0c PU |
3199 | res->desc[i].num, res->desc[i].start_sec, |
3200 | res->desc[i].num_sec); | |
032a1ec5 | 3201 | |
fa42da11 | 3202 | valid_set = true; |
519c5c0c | 3203 | res_count = res->desc[i].num + res->desc[i].num_sec; |
032a1ec5 | 3204 | res->desc[i].res_map = |
519c5c0c | 3205 | devm_kzalloc(dev, BITS_TO_LONGS(res_count) * |
032a1ec5 LV |
3206 | sizeof(*res->desc[i].res_map), GFP_KERNEL); |
3207 | if (!res->desc[i].res_map) | |
3208 | return ERR_PTR(-ENOMEM); | |
3209 | } | |
3210 | raw_spin_lock_init(&res->lock); | |
3211 | ||
fa42da11 PU |
3212 | if (valid_set) |
3213 | return res; | |
3214 | ||
3215 | return ERR_PTR(-EINVAL); | |
032a1ec5 LV |
3216 | } |
3217 | ||
53bf2b0e LV |
3218 | /** |
3219 | * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device | |
3220 | * @handle: TISCI handle | |
3221 | * @dev: Device pointer to which the resource is assigned | |
3222 | * @dev_id: TISCI device id to which the resource is assigned | |
3223 | * @of_prop: property name by which the resource are represented | |
3224 | * | |
3225 | * Return: Pointer to ti_sci_resource if all went well else appropriate | |
3226 | * error pointer. | |
3227 | */ | |
3228 | struct ti_sci_resource * | |
3229 | devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle, | |
3230 | struct device *dev, u32 dev_id, char *of_prop) | |
3231 | { | |
3232 | struct ti_sci_resource *res; | |
3233 | u32 *sub_types; | |
3234 | int sets; | |
3235 | ||
3236 | sets = of_property_count_elems_of_size(dev_of_node(dev), of_prop, | |
3237 | sizeof(u32)); | |
3238 | if (sets < 0) { | |
3239 | dev_err(dev, "%s resource type ids not available\n", of_prop); | |
3240 | return ERR_PTR(sets); | |
3241 | } | |
3242 | ||
3243 | sub_types = kcalloc(sets, sizeof(*sub_types), GFP_KERNEL); | |
3244 | if (!sub_types) | |
3245 | return ERR_PTR(-ENOMEM); | |
3246 | ||
3247 | of_property_read_u32_array(dev_of_node(dev), of_prop, sub_types, sets); | |
3248 | res = devm_ti_sci_get_resource_sets(handle, dev, dev_id, sub_types, | |
3249 | sets); | |
3250 | ||
3251 | kfree(sub_types); | |
3252 | return res; | |
3253 | } | |
3254 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_of_resource); | |
3255 | ||
3256 | /** | |
3257 | * devm_ti_sci_get_resource() - Get a resource range assigned to the device | |
3258 | * @handle: TISCI handle | |
3259 | * @dev: Device pointer to which the resource is assigned | |
3260 | * @dev_id: TISCI device id to which the resource is assigned | |
3261 | * @suub_type: TISCI resource subytpe representing the resource. | |
3262 | * | |
3263 | * Return: Pointer to ti_sci_resource if all went well else appropriate | |
3264 | * error pointer. | |
3265 | */ | |
3266 | struct ti_sci_resource * | |
3267 | devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev, | |
3268 | u32 dev_id, u32 sub_type) | |
3269 | { | |
3270 | return devm_ti_sci_get_resource_sets(handle, dev, dev_id, &sub_type, 1); | |
3271 | } | |
3272 | EXPORT_SYMBOL_GPL(devm_ti_sci_get_resource); | |
3273 | ||
912cffb4 NM |
3274 | static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode, |
3275 | void *cmd) | |
3276 | { | |
3277 | struct ti_sci_info *info = reboot_to_ti_sci_info(nb); | |
3278 | const struct ti_sci_handle *handle = &info->handle; | |
3279 | ||
3280 | ti_sci_cmd_core_reboot(handle); | |
3281 | ||
3282 | /* call fail OR pass, we should not be here in the first place */ | |
3283 | return NOTIFY_BAD; | |
3284 | } | |
3285 | ||
b9e8a7d9 DG |
3286 | static void ti_sci_set_is_suspending(struct ti_sci_info *info, bool is_suspending) |
3287 | { | |
3288 | info->is_suspending = is_suspending; | |
3289 | } | |
3290 | ||
3291 | static int ti_sci_suspend(struct device *dev) | |
3292 | { | |
3293 | struct ti_sci_info *info = dev_get_drvdata(dev); | |
3294 | /* | |
3295 | * We must switch operation to polled mode now as drivers and the genpd | |
3296 | * layer may make late TI SCI calls to change clock and device states | |
3297 | * from the noirq phase of suspend. | |
3298 | */ | |
3299 | ti_sci_set_is_suspending(info, true); | |
3300 | ||
3301 | return 0; | |
3302 | } | |
3303 | ||
3304 | static int ti_sci_resume(struct device *dev) | |
3305 | { | |
3306 | struct ti_sci_info *info = dev_get_drvdata(dev); | |
3307 | ||
3308 | ti_sci_set_is_suspending(info, false); | |
3309 | ||
3310 | return 0; | |
3311 | } | |
3312 | ||
3313 | static DEFINE_SIMPLE_DEV_PM_OPS(ti_sci_pm_ops, ti_sci_suspend, ti_sci_resume); | |
3314 | ||
aa276781 NM |
3315 | /* Description for K2G */ |
3316 | static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = { | |
e69a3553 | 3317 | .default_host_id = 2, |
aa276781 NM |
3318 | /* Conservative duration */ |
3319 | .max_rx_timeout_ms = 1000, | |
3320 | /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ | |
3321 | .max_msgs = 20, | |
3322 | .max_msg_size = 64, | |
754c9477 PU |
3323 | }; |
3324 | ||
754c9477 PU |
3325 | /* Description for AM654 */ |
3326 | static const struct ti_sci_desc ti_sci_pmmc_am654_desc = { | |
3327 | .default_host_id = 12, | |
3328 | /* Conservative duration */ | |
3329 | .max_rx_timeout_ms = 10000, | |
3330 | /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ | |
3331 | .max_msgs = 20, | |
3332 | .max_msg_size = 60, | |
aa276781 NM |
3333 | }; |
3334 | ||
3335 | static const struct of_device_id ti_sci_of_match[] = { | |
3336 | {.compatible = "ti,k2g-sci", .data = &ti_sci_pmmc_k2g_desc}, | |
754c9477 | 3337 | {.compatible = "ti,am654-sci", .data = &ti_sci_pmmc_am654_desc}, |
aa276781 NM |
3338 | { /* Sentinel */ }, |
3339 | }; | |
3340 | MODULE_DEVICE_TABLE(of, ti_sci_of_match); | |
3341 | ||
3342 | static int ti_sci_probe(struct platform_device *pdev) | |
3343 | { | |
3344 | struct device *dev = &pdev->dev; | |
3345 | const struct of_device_id *of_id; | |
3346 | const struct ti_sci_desc *desc; | |
3347 | struct ti_sci_xfer *xfer; | |
3348 | struct ti_sci_info *info = NULL; | |
3349 | struct ti_sci_xfers_info *minfo; | |
3350 | struct mbox_client *cl; | |
3351 | int ret = -EINVAL; | |
3352 | int i; | |
912cffb4 | 3353 | int reboot = 0; |
e69a3553 | 3354 | u32 h_id; |
aa276781 NM |
3355 | |
3356 | of_id = of_match_device(ti_sci_of_match, dev); | |
3357 | if (!of_id) { | |
3358 | dev_err(dev, "OF data missing\n"); | |
3359 | return -EINVAL; | |
3360 | } | |
3361 | desc = of_id->data; | |
3362 | ||
3363 | info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); | |
3364 | if (!info) | |
3365 | return -ENOMEM; | |
3366 | ||
3367 | info->dev = dev; | |
3368 | info->desc = desc; | |
e69a3553 NM |
3369 | ret = of_property_read_u32(dev->of_node, "ti,host-id", &h_id); |
3370 | /* if the property is not present in DT, use a default from desc */ | |
3371 | if (ret < 0) { | |
3372 | info->host_id = info->desc->default_host_id; | |
3373 | } else { | |
3374 | if (!h_id) { | |
3375 | dev_warn(dev, "Host ID 0 is reserved for firmware\n"); | |
3376 | info->host_id = info->desc->default_host_id; | |
3377 | } else { | |
3378 | info->host_id = h_id; | |
3379 | } | |
3380 | } | |
3381 | ||
912cffb4 NM |
3382 | reboot = of_property_read_bool(dev->of_node, |
3383 | "ti,system-reboot-controller"); | |
aa276781 NM |
3384 | INIT_LIST_HEAD(&info->node); |
3385 | minfo = &info->minfo; | |
3386 | ||
3387 | /* | |
3388 | * Pre-allocate messages | |
3389 | * NEVER allocate more than what we can indicate in hdr.seq | |
3390 | * if we have data description bug, force a fix.. | |
3391 | */ | |
3392 | if (WARN_ON(desc->max_msgs >= | |
3393 | 1 << 8 * sizeof(((struct ti_sci_msg_hdr *)0)->seq))) | |
3394 | return -EINVAL; | |
3395 | ||
3396 | minfo->xfer_block = devm_kcalloc(dev, | |
3397 | desc->max_msgs, | |
3398 | sizeof(*minfo->xfer_block), | |
3399 | GFP_KERNEL); | |
3400 | if (!minfo->xfer_block) | |
3401 | return -ENOMEM; | |
3402 | ||
a86854d0 KC |
3403 | minfo->xfer_alloc_table = devm_kcalloc(dev, |
3404 | BITS_TO_LONGS(desc->max_msgs), | |
3405 | sizeof(unsigned long), | |
aa276781 NM |
3406 | GFP_KERNEL); |
3407 | if (!minfo->xfer_alloc_table) | |
3408 | return -ENOMEM; | |
3409 | bitmap_zero(minfo->xfer_alloc_table, desc->max_msgs); | |
3410 | ||
3411 | /* Pre-initialize the buffer pointer to pre-allocated buffers */ | |
3412 | for (i = 0, xfer = minfo->xfer_block; i < desc->max_msgs; i++, xfer++) { | |
3413 | xfer->xfer_buf = devm_kcalloc(dev, 1, desc->max_msg_size, | |
3414 | GFP_KERNEL); | |
3415 | if (!xfer->xfer_buf) | |
3416 | return -ENOMEM; | |
3417 | ||
3418 | xfer->tx_message.buf = xfer->xfer_buf; | |
3419 | init_completion(&xfer->done); | |
3420 | } | |
3421 | ||
3422 | ret = ti_sci_debugfs_create(pdev, info); | |
3423 | if (ret) | |
3424 | dev_warn(dev, "Failed to create debug file\n"); | |
3425 | ||
3426 | platform_set_drvdata(pdev, info); | |
3427 | ||
3428 | cl = &info->cl; | |
3429 | cl->dev = dev; | |
3430 | cl->tx_block = false; | |
3431 | cl->rx_callback = ti_sci_rx_callback; | |
3432 | cl->knows_txdone = true; | |
3433 | ||
3434 | spin_lock_init(&minfo->xfer_lock); | |
3435 | sema_init(&minfo->sem_xfer_count, desc->max_msgs); | |
3436 | ||
3437 | info->chan_rx = mbox_request_channel_byname(cl, "rx"); | |
3438 | if (IS_ERR(info->chan_rx)) { | |
3439 | ret = PTR_ERR(info->chan_rx); | |
3440 | goto out; | |
3441 | } | |
3442 | ||
3443 | info->chan_tx = mbox_request_channel_byname(cl, "tx"); | |
3444 | if (IS_ERR(info->chan_tx)) { | |
3445 | ret = PTR_ERR(info->chan_tx); | |
3446 | goto out; | |
3447 | } | |
3448 | ret = ti_sci_cmd_get_revision(info); | |
3449 | if (ret) { | |
3450 | dev_err(dev, "Unable to communicate with TISCI(%d)\n", ret); | |
3451 | goto out; | |
3452 | } | |
3453 | ||
9e7d756d NM |
3454 | ti_sci_setup_ops(info); |
3455 | ||
912cffb4 NM |
3456 | if (reboot) { |
3457 | info->nb.notifier_call = tisci_reboot_handler; | |
3458 | info->nb.priority = 128; | |
3459 | ||
3460 | ret = register_restart_handler(&info->nb); | |
3461 | if (ret) { | |
3462 | dev_err(dev, "reboot registration fail(%d)\n", ret); | |
a181bcfc | 3463 | goto out; |
912cffb4 NM |
3464 | } |
3465 | } | |
3466 | ||
aa276781 NM |
3467 | dev_info(dev, "ABI: %d.%d (firmware rev 0x%04x '%s')\n", |
3468 | info->handle.version.abi_major, info->handle.version.abi_minor, | |
3469 | info->handle.version.firmware_revision, | |
3470 | info->handle.version.firmware_description); | |
3471 | ||
3472 | mutex_lock(&ti_sci_list_mutex); | |
3473 | list_add_tail(&info->node, &ti_sci_list); | |
3474 | mutex_unlock(&ti_sci_list_mutex); | |
3475 | ||
3476 | return of_platform_populate(dev->of_node, NULL, NULL, dev); | |
3477 | out: | |
3478 | if (!IS_ERR(info->chan_tx)) | |
3479 | mbox_free_channel(info->chan_tx); | |
3480 | if (!IS_ERR(info->chan_rx)) | |
3481 | mbox_free_channel(info->chan_rx); | |
3482 | debugfs_remove(info->d); | |
3483 | return ret; | |
3484 | } | |
3485 | ||
3486 | static int ti_sci_remove(struct platform_device *pdev) | |
3487 | { | |
3488 | struct ti_sci_info *info; | |
3489 | struct device *dev = &pdev->dev; | |
3490 | int ret = 0; | |
3491 | ||
3492 | of_platform_depopulate(dev); | |
3493 | ||
3494 | info = platform_get_drvdata(pdev); | |
3495 | ||
912cffb4 NM |
3496 | if (info->nb.notifier_call) |
3497 | unregister_restart_handler(&info->nb); | |
3498 | ||
aa276781 NM |
3499 | mutex_lock(&ti_sci_list_mutex); |
3500 | if (info->users) | |
3501 | ret = -EBUSY; | |
3502 | else | |
3503 | list_del(&info->node); | |
3504 | mutex_unlock(&ti_sci_list_mutex); | |
3505 | ||
3506 | if (!ret) { | |
3507 | ti_sci_debugfs_destroy(pdev, info); | |
3508 | ||
3509 | /* Safe to free channels since no more users */ | |
3510 | mbox_free_channel(info->chan_tx); | |
3511 | mbox_free_channel(info->chan_rx); | |
3512 | } | |
3513 | ||
3514 | return ret; | |
3515 | } | |
3516 | ||
3517 | static struct platform_driver ti_sci_driver = { | |
3518 | .probe = ti_sci_probe, | |
3519 | .remove = ti_sci_remove, | |
3520 | .driver = { | |
3521 | .name = "ti-sci", | |
3522 | .of_match_table = of_match_ptr(ti_sci_of_match), | |
b9e8a7d9 | 3523 | .pm = &ti_sci_pm_ops, |
aa276781 NM |
3524 | }, |
3525 | }; | |
3526 | module_platform_driver(ti_sci_driver); | |
3527 | ||
3528 | MODULE_LICENSE("GPL v2"); | |
3529 | MODULE_DESCRIPTION("TI System Control Interface(SCI) driver"); | |
3530 | MODULE_AUTHOR("Nishanth Menon"); | |
3531 | MODULE_ALIAS("platform:ti-sci"); |