1 // SPDX-License-Identifier: GPL-2.0+
3 * Texas Instruments System Control Interface Protocol Driver
4 * Based on drivers/firmware/ti_sci.c from Linux.
6 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
7 * Lokesh Vutla <lokeshvutla@ti.com>
14 #include <dm/device.h>
15 #include <linux/err.h>
16 #include <linux/soc/ti/k3-sec-proxy.h>
17 #include <linux/soc/ti/ti_sci_protocol.h>
21 /* List of all TI SCI devices active in system */
22 static LIST_HEAD(ti_sci_list);
25 * struct ti_sci_xfer - Structure representing a message flow
26 * @tx_message: Transmit message
27 * @rx_len: Receive message length
30 struct k3_sec_proxy_msg tx_message;
35 * struct ti_sci_desc - Description of SoC integration
36 * @host_id: Host identifier representing the compute entity
37 * @max_rx_timeout_us: Timeout for communication with SoC (in Microseconds)
38 * @max_msg_size: Maximum size of data per message that can be handled.
42 int max_rx_timeout_us;
47 * struct ti_sci_info - Structure representing a TI SCI instance
48 * @dev: Device pointer
49 * @desc: SoC description for this instance
50 * @handle: Instance of TI SCI handle to send to clients.
51 * @chan_tx: Transmit mailbox channel
52 * @chan_rx: Receive mailbox channel
55 * @is_secure: Determines if the communication is through secure threads.
56 * @host_id: Host identifier representing the compute entity
57 * @seq: Seq id used for verification for tx and rx message.
61 const struct ti_sci_desc *desc;
62 struct ti_sci_handle handle;
63 struct mbox_chan chan_tx;
64 struct mbox_chan chan_rx;
65 struct mbox_chan chan_notify;
66 struct ti_sci_xfer xfer;
67 struct list_head list;
73 #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle)
76 * ti_sci_setup_one_xfer() - Setup one message type
77 * @info: Pointer to SCI entity information
78 * @msg_type: Message type
79 * @msg_flags: Flag to set for the message
80 * @buf: Buffer to be send to mailbox channel
81 * @tx_message_size: transmit message size
82 * @rx_message_size: receive message size
84 * Helper function which is used by various command functions that are
85 * exposed to clients of this driver for allocating a message traffic event.
87 * Return: Corresponding ti_sci_xfer pointer if all went fine,
88 * else appropriate error pointer.
90 static struct ti_sci_xfer *ti_sci_setup_one_xfer(struct ti_sci_info *info,
91 u16 msg_type, u32 msg_flags,
93 size_t tx_message_size,
94 size_t rx_message_size)
96 struct ti_sci_xfer *xfer = &info->xfer;
97 struct ti_sci_msg_hdr *hdr;
99 /* Ensure we have sane transfer sizes */
100 if (rx_message_size > info->desc->max_msg_size ||
101 tx_message_size > info->desc->max_msg_size ||
102 rx_message_size < sizeof(*hdr) || tx_message_size < sizeof(*hdr))
103 return ERR_PTR(-ERANGE);
105 info->seq = ~info->seq;
106 xfer->tx_message.buf = buf;
107 xfer->tx_message.len = tx_message_size;
108 xfer->rx_len = (u8)rx_message_size;
110 hdr = (struct ti_sci_msg_hdr *)buf;
111 hdr->seq = info->seq;
112 hdr->type = msg_type;
113 hdr->host = info->host_id;
114 hdr->flags = msg_flags;
120 * ti_sci_get_response() - Receive response from mailbox channel
121 * @info: Pointer to SCI entity information
122 * @xfer: Transfer to initiate and wait for response
123 * @chan: Channel to receive the response
125 * Return: -ETIMEDOUT in case of no response, if transmit error,
126 * return corresponding error, else if all goes well,
129 static inline int ti_sci_get_response(struct ti_sci_info *info,
130 struct ti_sci_xfer *xfer,
131 struct mbox_chan *chan)
133 struct k3_sec_proxy_msg *msg = &xfer->tx_message;
134 struct ti_sci_secure_msg_hdr *secure_hdr;
135 struct ti_sci_msg_hdr *hdr;
138 /* Receive the response */
139 ret = mbox_recv(chan, msg, info->desc->max_rx_timeout_us);
141 dev_err(info->dev, "%s: Message receive failed. ret = %d\n",
146 /* ToDo: Verify checksum */
147 if (info->is_secure) {
148 secure_hdr = (struct ti_sci_secure_msg_hdr *)msg->buf;
149 msg->buf = (u32 *)((void *)msg->buf + sizeof(*secure_hdr));
152 /* msg is updated by mailbox driver */
153 hdr = (struct ti_sci_msg_hdr *)msg->buf;
155 /* Sanity check for message response */
156 if (hdr->seq != info->seq) {
157 dev_dbg(info->dev, "%s: Message for %d is not expected\n",
162 if (msg->len > info->desc->max_msg_size) {
163 dev_err(info->dev, "%s: Unable to handle %zu xfer (max %d)\n",
164 __func__, msg->len, info->desc->max_msg_size);
168 if (msg->len < xfer->rx_len) {
169 dev_err(info->dev, "%s: Recv xfer %zu < expected %d length\n",
170 __func__, msg->len, xfer->rx_len);
177 * ti_sci_do_xfer() - Do one transfer
178 * @info: Pointer to SCI entity information
179 * @xfer: Transfer to initiate and wait for response
181 * Return: 0 if all went fine, else return appropriate error.
183 static inline int ti_sci_do_xfer(struct ti_sci_info *info,
184 struct ti_sci_xfer *xfer)
186 struct k3_sec_proxy_msg *msg = &xfer->tx_message;
187 u8 secure_buf[info->desc->max_msg_size];
188 struct ti_sci_secure_msg_hdr secure_hdr;
191 if (info->is_secure) {
192 /* ToDo: get checksum of the entire message */
193 secure_hdr.checksum = 0;
194 secure_hdr.reserved = 0;
195 memcpy(&secure_buf[sizeof(secure_hdr)], xfer->tx_message.buf,
196 xfer->tx_message.len);
198 xfer->tx_message.buf = (u32 *)secure_buf;
199 xfer->tx_message.len += sizeof(secure_hdr);
200 xfer->rx_len += sizeof(secure_hdr);
203 /* Send the message */
204 ret = mbox_send(&info->chan_tx, msg);
206 dev_err(info->dev, "%s: Message sending failed. ret = %d\n",
211 return ti_sci_get_response(info, xfer, &info->chan_rx);
215 * ti_sci_cmd_get_revision() - command to get the revision of the SCI entity
216 * @handle: pointer to TI SCI handle
218 * Updates the SCI information in the internal data structure.
220 * Return: 0 if all went fine, else return appropriate error.
222 static int ti_sci_cmd_get_revision(struct ti_sci_handle *handle)
224 struct ti_sci_msg_resp_version *rev_info;
225 struct ti_sci_version_info *ver;
226 struct ti_sci_msg_hdr hdr;
227 struct ti_sci_info *info;
228 struct ti_sci_xfer *xfer;
232 return PTR_ERR(handle);
236 info = handle_to_ti_sci_info(handle);
238 xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_VERSION, 0x0,
239 (u32 *)&hdr, sizeof(struct ti_sci_msg_hdr),
243 dev_err(info->dev, "Message alloc failed(%d)\n", ret);
247 ret = ti_sci_do_xfer(info, xfer);
249 dev_err(info->dev, "Mbox communication fail %d\n", ret);
253 rev_info = (struct ti_sci_msg_resp_version *)xfer->tx_message.buf;
255 ver = &handle->version;
256 ver->abi_major = rev_info->abi_major;
257 ver->abi_minor = rev_info->abi_minor;
258 ver->firmware_revision = rev_info->firmware_revision;
259 strncpy(ver->firmware_description, rev_info->firmware_description,
260 sizeof(ver->firmware_description));
266 * ti_sci_is_response_ack() - Generic ACK/NACK message checkup
267 * @r: pointer to response buffer
269 * Return: true if the response was an ACK, else returns false.
271 static inline bool ti_sci_is_response_ack(void *r)
273 struct ti_sci_msg_hdr *hdr = r;
275 return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false;
279 * cmd_set_board_config_using_msg() - Common command to send board configuration
281 * @handle: pointer to TI SCI handle
282 * @msg_type: One of the TISCI message types to set board configuration
283 * @addr: Address where the board config structure is located
284 * @size: Size of the board config structure
286 * Return: 0 if all went well, else returns appropriate error value.
288 static int cmd_set_board_config_using_msg(const struct ti_sci_handle *handle,
289 u16 msg_type, u64 addr, u32 size)
291 struct ti_sci_msg_board_config req;
292 struct ti_sci_msg_hdr *resp;
293 struct ti_sci_info *info;
294 struct ti_sci_xfer *xfer;
298 return PTR_ERR(handle);
302 info = handle_to_ti_sci_info(handle);
304 xfer = ti_sci_setup_one_xfer(info, msg_type,
305 TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
306 (u32 *)&req, sizeof(req), sizeof(*resp));
309 dev_err(info->dev, "Message alloc failed(%d)\n", ret);
312 req.boardcfgp_high = (addr >> 32) & 0xffffffff;
313 req.boardcfgp_low = addr & 0xffffffff;
314 req.boardcfg_size = size;
316 ret = ti_sci_do_xfer(info, xfer);
318 dev_err(info->dev, "Mbox send fail %d\n", ret);
322 resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
324 if (!ti_sci_is_response_ack(resp))
331 * ti_sci_cmd_set_board_config() - Command to send board configuration message
332 * @handle: pointer to TI SCI handle
333 * @addr: Address where the board config structure is located
334 * @size: Size of the board config structure
336 * Return: 0 if all went well, else returns appropriate error value.
338 static int ti_sci_cmd_set_board_config(const struct ti_sci_handle *handle,
341 return cmd_set_board_config_using_msg(handle,
342 TI_SCI_MSG_BOARD_CONFIG,
347 * ti_sci_cmd_set_board_config_rm() - Command to send board resource
348 * management configuration
349 * @handle: pointer to TI SCI handle
350 * @addr: Address where the board RM config structure is located
351 * @size: Size of the RM config structure
353 * Return: 0 if all went well, else returns appropriate error value.
356 int ti_sci_cmd_set_board_config_rm(const struct ti_sci_handle *handle,
359 return cmd_set_board_config_using_msg(handle,
360 TI_SCI_MSG_BOARD_CONFIG_RM,
365 * ti_sci_cmd_set_board_config_security() - Command to send board security
366 * configuration message
367 * @handle: pointer to TI SCI handle
368 * @addr: Address where the board security config structure is located
369 * @size: Size of the security config structure
371 * Return: 0 if all went well, else returns appropriate error value.
374 int ti_sci_cmd_set_board_config_security(const struct ti_sci_handle *handle,
377 return cmd_set_board_config_using_msg(handle,
378 TI_SCI_MSG_BOARD_CONFIG_SECURITY,
383 * ti_sci_cmd_set_board_config_pm() - Command to send board power and clock
384 * configuration message
385 * @handle: pointer to TI SCI handle
386 * @addr: Address where the board PM config structure is located
387 * @size: Size of the PM config structure
389 * Return: 0 if all went well, else returns appropriate error value.
391 static int ti_sci_cmd_set_board_config_pm(const struct ti_sci_handle *handle,
394 return cmd_set_board_config_using_msg(handle,
395 TI_SCI_MSG_BOARD_CONFIG_PM,
400 * ti_sci_set_device_state() - Set device state helper
401 * @handle: pointer to TI SCI handle
402 * @id: Device identifier
403 * @flags: flags to setup for the device
404 * @state: State to move the device to
406 * Return: 0 if all went well, else returns appropriate error value.
408 static int ti_sci_set_device_state(const struct ti_sci_handle *handle,
409 u32 id, u32 flags, u8 state)
411 struct ti_sci_msg_req_set_device_state req;
412 struct ti_sci_msg_hdr *resp;
413 struct ti_sci_info *info;
414 struct ti_sci_xfer *xfer;
418 return PTR_ERR(handle);
422 info = handle_to_ti_sci_info(handle);
424 xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_DEVICE_STATE,
425 flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
426 (u32 *)&req, sizeof(req), sizeof(*resp));
429 dev_err(info->dev, "Message alloc failed(%d)\n", ret);
435 ret = ti_sci_do_xfer(info, xfer);
437 dev_err(info->dev, "Mbox send fail %d\n", ret);
441 resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
443 if (!ti_sci_is_response_ack(resp))
450 * ti_sci_get_device_state() - Get device state helper
451 * @handle: Handle to the device
452 * @id: Device Identifier
453 * @clcnt: Pointer to Context Loss Count
454 * @resets: pointer to resets
455 * @p_state: pointer to p_state
456 * @c_state: pointer to c_state
458 * Return: 0 if all went fine, else return appropriate error.
460 static int ti_sci_get_device_state(const struct ti_sci_handle *handle,
461 u32 id, u32 *clcnt, u32 *resets,
462 u8 *p_state, u8 *c_state)
464 struct ti_sci_msg_resp_get_device_state *resp;
465 struct ti_sci_msg_req_get_device_state req;
466 struct ti_sci_info *info;
467 struct ti_sci_xfer *xfer;
471 return PTR_ERR(handle);
475 if (!clcnt && !resets && !p_state && !c_state)
478 info = handle_to_ti_sci_info(handle);
480 /* Response is expected, so need of any flags */
481 xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_GET_DEVICE_STATE, 0,
482 (u32 *)&req, sizeof(req), sizeof(*resp));
485 dev_err(info->dev, "Message alloc failed(%d)\n", ret);
490 ret = ti_sci_do_xfer(info, xfer);
492 dev_err(dev, "Mbox send fail %d\n", ret);
496 resp = (struct ti_sci_msg_resp_get_device_state *)xfer->tx_message.buf;
497 if (!ti_sci_is_response_ack(resp))
501 *clcnt = resp->context_loss_count;
503 *resets = resp->resets;
505 *p_state = resp->programmed_state;
507 *c_state = resp->current_state;
513 * ti_sci_cmd_get_device() - command to request for device managed by TISCI
514 * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
515 * @id: Device Identifier
517 * Request for the device - NOTE: the client MUST maintain integrity of
518 * usage count by balancing get_device with put_device. No refcounting is
519 * managed by driver for that purpose.
521 * NOTE: The request is for exclusive access for the processor.
523 * Return: 0 if all went fine, else return appropriate error.
525 static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id)
527 return ti_sci_set_device_state(handle, id,
528 MSG_FLAG_DEVICE_EXCLUSIVE,
529 MSG_DEVICE_SW_STATE_ON);
533 * ti_sci_cmd_idle_device() - Command to idle a device managed by TISCI
534 * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
535 * @id: Device Identifier
537 * Request for the device - NOTE: the client MUST maintain integrity of
538 * usage count by balancing get_device with put_device. No refcounting is
539 * managed by driver for that purpose.
541 * Return: 0 if all went fine, else return appropriate error.
543 static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id)
545 return ti_sci_set_device_state(handle, id,
546 MSG_FLAG_DEVICE_EXCLUSIVE,
547 MSG_DEVICE_SW_STATE_RETENTION);
551 * ti_sci_cmd_put_device() - command to release a device managed by TISCI
552 * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
553 * @id: Device Identifier
555 * Request for the device - NOTE: the client MUST maintain integrity of
556 * usage count by balancing get_device with put_device. No refcounting is
557 * managed by driver for that purpose.
559 * Return: 0 if all went fine, else return appropriate error.
561 static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id)
563 return ti_sci_set_device_state(handle, id,
564 0, MSG_DEVICE_SW_STATE_AUTO_OFF);
568 * ti_sci_cmd_dev_is_valid() - Is the device valid
569 * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
570 * @id: Device Identifier
572 * Return: 0 if all went fine and the device ID is valid, else return
575 static int ti_sci_cmd_dev_is_valid(const struct ti_sci_handle *handle, u32 id)
579 /* check the device state which will also tell us if the ID is valid */
580 return ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &unused);
584 * ti_sci_cmd_dev_get_clcnt() - Get context loss counter
585 * @handle: Pointer to TISCI handle
586 * @id: Device Identifier
587 * @count: Pointer to Context Loss counter to populate
589 * Return: 0 if all went fine, else return appropriate error.
591 static int ti_sci_cmd_dev_get_clcnt(const struct ti_sci_handle *handle, u32 id,
594 return ti_sci_get_device_state(handle, id, count, NULL, NULL, NULL);
598 * ti_sci_cmd_dev_is_idle() - Check if the device is requested to be idle
599 * @handle: Pointer to TISCI handle
600 * @id: Device Identifier
601 * @r_state: true if requested to be idle
603 * Return: 0 if all went fine, else return appropriate error.
605 static int ti_sci_cmd_dev_is_idle(const struct ti_sci_handle *handle, u32 id,
614 ret = ti_sci_get_device_state(handle, id, NULL, NULL, &state, NULL);
618 *r_state = (state == MSG_DEVICE_SW_STATE_RETENTION);
624 * ti_sci_cmd_dev_is_stop() - Check if the device is requested to be stopped
625 * @handle: Pointer to TISCI handle
626 * @id: Device Identifier
627 * @r_state: true if requested to be stopped
628 * @curr_state: true if currently stopped.
630 * Return: 0 if all went fine, else return appropriate error.
632 static int ti_sci_cmd_dev_is_stop(const struct ti_sci_handle *handle, u32 id,
633 bool *r_state, bool *curr_state)
638 if (!r_state && !curr_state)
642 ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state);
647 *r_state = (p_state == MSG_DEVICE_SW_STATE_AUTO_OFF);
649 *curr_state = (c_state == MSG_DEVICE_HW_STATE_OFF);
655 * ti_sci_cmd_dev_is_on() - Check if the device is requested to be ON
656 * @handle: Pointer to TISCI handle
657 * @id: Device Identifier
658 * @r_state: true if requested to be ON
659 * @curr_state: true if currently ON and active
661 * Return: 0 if all went fine, else return appropriate error.
663 static int ti_sci_cmd_dev_is_on(const struct ti_sci_handle *handle, u32 id,
664 bool *r_state, bool *curr_state)
669 if (!r_state && !curr_state)
673 ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state);
678 *r_state = (p_state == MSG_DEVICE_SW_STATE_ON);
680 *curr_state = (c_state == MSG_DEVICE_HW_STATE_ON);
686 * ti_sci_cmd_dev_is_trans() - Check if the device is currently transitioning
687 * @handle: Pointer to TISCI handle
688 * @id: Device Identifier
689 * @curr_state: true if currently transitioning.
691 * Return: 0 if all went fine, else return appropriate error.
693 static int ti_sci_cmd_dev_is_trans(const struct ti_sci_handle *handle, u32 id,
702 ret = ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &state);
706 *curr_state = (state == MSG_DEVICE_HW_STATE_TRANS);
712 * ti_sci_cmd_set_device_resets() - command to set resets for device managed
714 * @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
715 * @id: Device Identifier
716 * @reset_state: Device specific reset bit field
718 * Return: 0 if all went fine, else return appropriate error.
720 static int ti_sci_cmd_set_device_resets(const struct ti_sci_handle *handle,
721 u32 id, u32 reset_state)
723 struct ti_sci_msg_req_set_device_resets req;
724 struct ti_sci_msg_hdr *resp;
725 struct ti_sci_info *info;
726 struct ti_sci_xfer *xfer;
730 return PTR_ERR(handle);
734 info = handle_to_ti_sci_info(handle);
736 xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_DEVICE_RESETS,
737 TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
738 (u32 *)&req, sizeof(req), sizeof(*resp));
741 dev_err(info->dev, "Message alloc failed(%d)\n", ret);
745 req.resets = reset_state;
747 ret = ti_sci_do_xfer(info, xfer);
749 dev_err(info->dev, "Mbox send fail %d\n", ret);
753 resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
755 if (!ti_sci_is_response_ack(resp))
762 * ti_sci_cmd_get_device_resets() - Get reset state for device managed
764 * @handle: Pointer to TISCI handle
765 * @id: Device Identifier
766 * @reset_state: Pointer to reset state to populate
768 * Return: 0 if all went fine, else return appropriate error.
770 static int ti_sci_cmd_get_device_resets(const struct ti_sci_handle *handle,
771 u32 id, u32 *reset_state)
773 return ti_sci_get_device_state(handle, id, NULL, reset_state, NULL,
778 * ti_sci_setup_ops() - Setup the operations structures
779 * @info: pointer to TISCI pointer
781 static void ti_sci_setup_ops(struct ti_sci_info *info)
783 struct ti_sci_ops *ops = &info->handle.ops;
784 struct ti_sci_board_ops *bops = &ops->board_ops;
785 struct ti_sci_dev_ops *dops = &ops->dev_ops;
787 bops->board_config = ti_sci_cmd_set_board_config;
788 bops->board_config_rm = ti_sci_cmd_set_board_config_rm;
789 bops->board_config_security = ti_sci_cmd_set_board_config_security;
790 bops->board_config_pm = ti_sci_cmd_set_board_config_pm;
792 dops->get_device = ti_sci_cmd_get_device;
793 dops->idle_device = ti_sci_cmd_idle_device;
794 dops->put_device = ti_sci_cmd_put_device;
795 dops->is_valid = ti_sci_cmd_dev_is_valid;
796 dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt;
797 dops->is_idle = ti_sci_cmd_dev_is_idle;
798 dops->is_stop = ti_sci_cmd_dev_is_stop;
799 dops->is_on = ti_sci_cmd_dev_is_on;
800 dops->is_transitioning = ti_sci_cmd_dev_is_trans;
801 dops->set_device_resets = ti_sci_cmd_set_device_resets;
802 dops->get_device_resets = ti_sci_cmd_get_device_resets;
806 * ti_sci_get_handle_from_sysfw() - Get the TI SCI handle of the SYSFW
807 * @dev: Pointer to the SYSFW device
809 * Return: pointer to handle if successful, else EINVAL if invalid conditions
813 struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *sci_dev)
816 return ERR_PTR(-EINVAL);
818 struct ti_sci_info *info = dev_get_priv(sci_dev);
821 return ERR_PTR(-EINVAL);
823 struct ti_sci_handle *handle = &info->handle;
826 return ERR_PTR(-EINVAL);
832 * ti_sci_get_handle() - Get the TI SCI handle for a device
833 * @dev: Pointer to device for which we want SCI handle
835 * Return: pointer to handle if successful, else EINVAL if invalid conditions
838 const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev)
841 return ERR_PTR(-EINVAL);
843 struct udevice *sci_dev = dev_get_parent(dev);
845 return ti_sci_get_handle_from_sysfw(sci_dev);
849 * ti_sci_get_by_phandle() - Get the TI SCI handle using DT phandle
851 * @propname: property name containing phandle on TISCI node
853 * Return: pointer to handle if successful, else appropriate error value.
855 const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
856 const char *property)
858 struct ti_sci_info *entry, *info = NULL;
862 err = ofnode_read_u32(dev_ofnode(dev), property, &phandle);
866 node = ofnode_get_by_phandle(phandle);
867 if (!ofnode_valid(node))
868 return ERR_PTR(-EINVAL);
870 list_for_each_entry(entry, &ti_sci_list, list)
871 if (ofnode_equal(dev_ofnode(entry->dev), node)) {
877 return ERR_PTR(-ENODEV);
879 return &info->handle;
883 * ti_sci_of_to_info() - generate private data from device tree
884 * @dev: corresponding system controller interface device
885 * @info: pointer to driver specific private data
887 * Return: 0 if all goes good, else appropriate error message.
889 static int ti_sci_of_to_info(struct udevice *dev, struct ti_sci_info *info)
893 ret = mbox_get_by_name(dev, "tx", &info->chan_tx);
895 dev_err(dev, "%s: Acquiring Tx channel failed. ret = %d\n",
900 ret = mbox_get_by_name(dev, "rx", &info->chan_rx);
902 dev_err(dev, "%s: Acquiring Rx channel failed. ret = %d\n",
907 /* Notify channel is optional. Enable only if populated */
908 ret = mbox_get_by_name(dev, "notify", &info->chan_notify);
910 dev_dbg(dev, "%s: Acquiring notify channel failed. ret = %d\n",
914 info->host_id = dev_read_u32_default(dev, "ti,host-id",
915 info->desc->host_id);
917 info->is_secure = dev_read_bool(dev, "ti,secure-host");
923 * ti_sci_probe() - Basic probe
924 * @dev: corresponding system controller interface device
926 * Return: 0 if all goes good, else appropriate error message.
928 static int ti_sci_probe(struct udevice *dev)
930 struct ti_sci_info *info;
933 debug("%s(dev=%p)\n", __func__, dev);
935 info = dev_get_priv(dev);
936 info->desc = (void *)dev_get_driver_data(dev);
938 ret = ti_sci_of_to_info(dev, info);
940 dev_err(dev, "%s: Probe failed with error %d\n", __func__, ret);
947 list_add_tail(&info->list, &ti_sci_list);
948 ti_sci_setup_ops(info);
950 ret = ti_sci_cmd_get_revision(&info->handle);
955 /* Description for AM654 */
956 static const struct ti_sci_desc ti_sci_sysfw_am654_desc = {
958 .max_rx_timeout_us = 1000000,
962 static const struct udevice_id ti_sci_ids[] = {
964 .compatible = "ti,k2g-sci",
965 .data = (ulong)&ti_sci_sysfw_am654_desc
970 U_BOOT_DRIVER(ti_sci) = {
972 .id = UCLASS_FIRMWARE,
973 .of_match = ti_sci_ids,
974 .probe = ti_sci_probe,
975 .priv_auto_alloc_size = sizeof(struct ti_sci_info),