1 // SPDX-License-Identifier: GPL-2.0
3 * Texas Instruments' Message Manager Driver
5 * Copyright (C) 2015-2022 Texas Instruments Incorporated - https://www.ti.com/
9 #define pr_fmt(fmt) "%s: " fmt, __func__
11 #include <linux/device.h>
12 #include <linux/interrupt.h>
14 #include <linux/iopoll.h>
15 #include <linux/kernel.h>
16 #include <linux/mailbox_controller.h>
17 #include <linux/module.h>
18 #include <linux/of_device.h>
20 #include <linux/of_irq.h>
21 #include <linux/platform_device.h>
22 #include <linux/soc/ti/ti-msgmgr.h>
24 #define Q_DATA_OFFSET(proxy, queue, reg) \
25 ((0x10000 * (proxy)) + (0x80 * (queue)) + ((reg) * 4))
26 #define Q_STATE_OFFSET(queue) ((queue) * 0x4)
27 #define Q_STATE_ENTRY_COUNT_MASK (0xFFF000)
29 #define SPROXY_THREAD_OFFSET(tid) (0x1000 * (tid))
30 #define SPROXY_THREAD_DATA_OFFSET(tid, reg) \
31 (SPROXY_THREAD_OFFSET(tid) + ((reg) * 0x4) + 0x4)
33 #define SPROXY_THREAD_STATUS_OFFSET(tid) (SPROXY_THREAD_OFFSET(tid))
35 #define SPROXY_THREAD_STATUS_COUNT_MASK (0xFF)
37 #define SPROXY_THREAD_CTRL_OFFSET(tid) (0x1000 + SPROXY_THREAD_OFFSET(tid))
38 #define SPROXY_THREAD_CTRL_DIR_MASK (0x1 << 31)
41 * struct ti_msgmgr_valid_queue_desc - SoC valid queues meant for this processor
42 * @queue_id: Queue Number for this path
43 * @proxy_id: Proxy ID representing the processor in SoC
44 * @is_tx: Is this a receive path?
46 struct ti_msgmgr_valid_queue_desc {
53 * struct ti_msgmgr_desc - Description of message manager integration
54 * @queue_count: Number of Queues
55 * @max_message_size: Message size in bytes
56 * @max_messages: Number of messages
57 * @data_first_reg: First data register for proxy data region
58 * @data_last_reg: Last data register for proxy data region
59 * @status_cnt_mask: Mask for getting the status value
60 * @status_err_mask: Mask for getting the error value, if applicable
61 * @tx_polled: Do I need to use polled mechanism for tx
62 * @tx_poll_timeout_ms: Timeout in ms if polled
63 * @valid_queues: List of Valid queues that the processor can access
64 * @data_region_name: Name of the proxy data region
65 * @status_region_name: Name of the proxy status region
66 * @ctrl_region_name: Name of the proxy control region
67 * @num_valid_queues: Number of valid queues
68 * @is_sproxy: Is this an Secure Proxy instance?
70 * This structure is used in of match data to describe how integration
71 * for a specific compatible SoC is done.
73 struct ti_msgmgr_desc {
82 int tx_poll_timeout_ms;
83 const struct ti_msgmgr_valid_queue_desc *valid_queues;
84 const char *data_region_name;
85 const char *status_region_name;
86 const char *ctrl_region_name;
92 * struct ti_queue_inst - Description of a queue instance
94 * @queue_id: Queue Identifier as mapped on SoC
95 * @proxy_id: Proxy Identifier as mapped on SoC
96 * @irq: IRQ for Rx Queue
97 * @is_tx: 'true' if transmit queue, else, 'false'
98 * @queue_buff_start: First register of Data Buffer
99 * @queue_buff_end: Last (or confirmation) register of Data buffer
100 * @queue_state: Queue status register
101 * @queue_ctrl: Queue Control register
102 * @chan: Mailbox channel
103 * @rx_buff: Receive buffer pointer allocated at probe, max_message_size
104 * @polled_rx_mode: Use polling for rx instead of interrupts
106 struct ti_queue_inst {
112 void __iomem *queue_buff_start;
113 void __iomem *queue_buff_end;
114 void __iomem *queue_state;
115 void __iomem *queue_ctrl;
116 struct mbox_chan *chan;
122 * struct ti_msgmgr_inst - Description of a Message Manager Instance
123 * @dev: device pointer corresponding to the Message Manager instance
124 * @desc: Description of the SoC integration
125 * @queue_proxy_region: Queue proxy region where queue buffers are located
126 * @queue_state_debug_region: Queue status register regions
127 * @queue_ctrl_region: Queue Control register regions
128 * @num_valid_queues: Number of valid queues defined for the processor
129 * Note: other queues are probably reserved for other processors
131 * @qinsts: Array of valid Queue Instances for the Processor
132 * @mbox: Mailbox Controller
133 * @chans: Array for channels corresponding to the Queue Instances.
135 struct ti_msgmgr_inst {
137 const struct ti_msgmgr_desc *desc;
138 void __iomem *queue_proxy_region;
139 void __iomem *queue_state_debug_region;
140 void __iomem *queue_ctrl_region;
142 struct ti_queue_inst *qinsts;
143 struct mbox_controller mbox;
144 struct mbox_chan *chans;
148 * ti_msgmgr_queue_get_num_messages() - Get the number of pending messages
149 * @d: Description of message manager
150 * @qinst: Queue instance for which we check the number of pending messages
152 * Return: number of messages pending in the queue (0 == no pending messages)
155 ti_msgmgr_queue_get_num_messages(const struct ti_msgmgr_desc *d,
156 struct ti_queue_inst *qinst)
159 u32 status_cnt_mask = d->status_cnt_mask;
162 * We cannot use relaxed operation here - update may happen
165 val = readl(qinst->queue_state) & status_cnt_mask;
166 val >>= __ffs(status_cnt_mask);
172 * ti_msgmgr_queue_is_error() - Check to see if there is queue error
173 * @d: Description of message manager
174 * @qinst: Queue instance for which we check the number of pending messages
176 * Return: true if error, else false
178 static inline bool ti_msgmgr_queue_is_error(const struct ti_msgmgr_desc *d,
179 struct ti_queue_inst *qinst)
183 /* Msgmgr has no error detection */
188 * We cannot use relaxed operation here - update may happen
191 val = readl(qinst->queue_state) & d->status_err_mask;
193 return val ? true : false;
196 static int ti_msgmgr_queue_rx_data(struct mbox_chan *chan, struct ti_queue_inst *qinst,
197 const struct ti_msgmgr_desc *desc)
200 struct ti_msgmgr_message message;
201 void __iomem *data_reg;
205 * I have no idea about the protocol being used to communicate with the
206 * remote producer - 0 could be valid data, so I wont make a judgement
207 * of how many bytes I should be reading. Let the client figure this
208 * out.. I just read the full message and pass it on..
210 message.len = desc->max_message_size;
211 message.buf = (u8 *)qinst->rx_buff;
214 * NOTE about register access involved here:
215 * the hardware block is implemented with 32bit access operations and no
216 * support for data splitting. We don't want the hardware to misbehave
217 * with sub 32bit access - For example: if the last register read is
218 * split into byte wise access, it can result in the queue getting
219 * stuck or indeterminate behavior. An out of order read operation may
220 * result in weird data results as well.
221 * Hence, we do not use memcpy_fromio or __ioread32_copy here, instead
222 * we depend on readl for the purpose.
224 * Also note that the final register read automatically marks the
225 * queue message as read.
227 for (data_reg = qinst->queue_buff_start, word_data = qinst->rx_buff,
228 num_words = (desc->max_message_size / sizeof(u32));
229 num_words; num_words--, data_reg += sizeof(u32), word_data++)
230 *word_data = readl(data_reg);
233 * Last register read automatically clears the IRQ if only 1 message
234 * is pending - so send the data up the stack..
235 * NOTE: Client is expected to be as optimal as possible, since
236 * we invoke the handler in IRQ context.
238 mbox_chan_received_data(chan, (void *)&message);
243 static int ti_msgmgr_queue_rx_poll_timeout(struct mbox_chan *chan, int timeout_us)
245 struct device *dev = chan->mbox->dev;
246 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
247 struct ti_queue_inst *qinst = chan->con_priv;
248 const struct ti_msgmgr_desc *desc = inst->desc;
252 ret = readl_poll_timeout_atomic(qinst->queue_state, msg_count,
253 (msg_count & desc->status_cnt_mask),
258 ti_msgmgr_queue_rx_data(chan, qinst, desc);
264 * ti_msgmgr_queue_rx_interrupt() - Interrupt handler for receive Queue
265 * @irq: Interrupt number
266 * @p: Channel Pointer
268 * Return: -EINVAL if there is no instance
269 * IRQ_NONE if the interrupt is not ours.
270 * IRQ_HANDLED if the rx interrupt was successfully handled.
272 static irqreturn_t ti_msgmgr_queue_rx_interrupt(int irq, void *p)
274 struct mbox_chan *chan = p;
275 struct device *dev = chan->mbox->dev;
276 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
277 struct ti_queue_inst *qinst = chan->con_priv;
278 const struct ti_msgmgr_desc *desc;
281 if (WARN_ON(!inst)) {
282 dev_err(dev, "no platform drv data??\n");
286 /* Do I have an invalid interrupt source? */
288 dev_err(dev, "Cannot handle rx interrupt on tx channel %s\n",
294 if (ti_msgmgr_queue_is_error(desc, qinst)) {
295 dev_err(dev, "Error on Rx channel %s\n", qinst->name);
299 /* Do I actually have messages to read? */
300 msg_count = ti_msgmgr_queue_get_num_messages(desc, qinst);
303 dev_dbg(dev, "Spurious event - 0 pending data!\n");
307 ti_msgmgr_queue_rx_data(chan, qinst, desc);
313 * ti_msgmgr_queue_peek_data() - Peek to see if there are any rx messages.
314 * @chan: Channel Pointer
316 * Return: 'true' if there is pending rx data, 'false' if there is none.
318 static bool ti_msgmgr_queue_peek_data(struct mbox_chan *chan)
320 struct ti_queue_inst *qinst = chan->con_priv;
321 struct device *dev = chan->mbox->dev;
322 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
323 const struct ti_msgmgr_desc *desc = inst->desc;
329 if (ti_msgmgr_queue_is_error(desc, qinst)) {
330 dev_err(dev, "Error on channel %s\n", qinst->name);
334 msg_count = ti_msgmgr_queue_get_num_messages(desc, qinst);
336 return msg_count ? true : false;
340 * ti_msgmgr_last_tx_done() - See if all the tx messages are sent
341 * @chan: Channel pointer
343 * Return: 'true' is no pending tx data, 'false' if there are any.
345 static bool ti_msgmgr_last_tx_done(struct mbox_chan *chan)
347 struct ti_queue_inst *qinst = chan->con_priv;
348 struct device *dev = chan->mbox->dev;
349 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
350 const struct ti_msgmgr_desc *desc = inst->desc;
356 if (ti_msgmgr_queue_is_error(desc, qinst)) {
357 dev_err(dev, "Error on channel %s\n", qinst->name);
361 msg_count = ti_msgmgr_queue_get_num_messages(desc, qinst);
363 if (desc->is_sproxy) {
364 /* In secure proxy, msg_count indicates how many we can send */
365 return msg_count ? true : false;
368 /* if we have any messages pending.. */
369 return msg_count ? false : true;
372 static bool ti_msgmgr_chan_has_polled_queue_rx(struct mbox_chan *chan)
374 struct ti_queue_inst *qinst;
379 qinst = chan->con_priv;
380 return qinst->polled_rx_mode;
384 * ti_msgmgr_send_data() - Send data
385 * @chan: Channel Pointer
386 * @data: ti_msgmgr_message * Message Pointer
388 * Return: 0 if all goes good, else appropriate error messages.
390 static int ti_msgmgr_send_data(struct mbox_chan *chan, void *data)
392 struct device *dev = chan->mbox->dev;
393 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
394 const struct ti_msgmgr_desc *desc;
395 struct ti_queue_inst *qinst = chan->con_priv;
396 int num_words, trail_bytes;
397 struct ti_msgmgr_message *message = data;
398 void __iomem *data_reg;
402 if (WARN_ON(!inst)) {
403 dev_err(dev, "no platform drv data??\n");
408 if (ti_msgmgr_queue_is_error(desc, qinst)) {
409 dev_err(dev, "Error on channel %s\n", qinst->name);
413 if (desc->max_message_size < message->len) {
414 dev_err(dev, "Queue %s message length %zu > max %d\n",
415 qinst->name, message->len, desc->max_message_size);
419 /* NOTE: Constraints similar to rx path exists here as well */
420 for (data_reg = qinst->queue_buff_start,
421 num_words = message->len / sizeof(u32),
422 word_data = (u32 *)message->buf;
423 num_words; num_words--, data_reg += sizeof(u32), word_data++)
424 writel(*word_data, data_reg);
426 trail_bytes = message->len % sizeof(u32);
428 u32 data_trail = *word_data;
430 /* Ensure all unused data is 0 */
431 data_trail &= 0xFFFFFFFF >> (8 * (sizeof(u32) - trail_bytes));
432 writel(data_trail, data_reg);
433 data_reg += sizeof(u32);
437 * 'data_reg' indicates next register to write. If we did not already
438 * write on tx complete reg(last reg), we must do so for transmit
439 * In addition, we also need to make sure all intermediate data
440 * registers(if any required), are reset to 0 for TISCI backward
441 * compatibility to be maintained.
443 while (data_reg <= qinst->queue_buff_end) {
445 data_reg += sizeof(u32);
448 /* If we are in polled mode, wait for a response before proceeding */
449 if (ti_msgmgr_chan_has_polled_queue_rx(message->chan_rx))
450 ret = ti_msgmgr_queue_rx_poll_timeout(message->chan_rx,
451 message->timeout_rx_ms * 1000);
457 * ti_msgmgr_queue_rx_irq_req() - RX IRQ request
458 * @dev: device pointer
459 * @d: descriptor for ti_msgmgr
460 * @qinst: Queue instance
461 * @chan: Channel pointer
463 static int ti_msgmgr_queue_rx_irq_req(struct device *dev,
464 const struct ti_msgmgr_desc *d,
465 struct ti_queue_inst *qinst,
466 struct mbox_chan *chan)
469 char of_rx_irq_name[7];
470 struct device_node *np;
472 snprintf(of_rx_irq_name, sizeof(of_rx_irq_name),
473 "rx_%03d", d->is_sproxy ? qinst->proxy_id : qinst->queue_id);
475 /* Get the IRQ if not found */
476 if (qinst->irq < 0) {
477 np = of_node_get(dev->of_node);
480 qinst->irq = of_irq_get_byname(np, of_rx_irq_name);
483 if (qinst->irq < 0) {
485 "QID %d PID %d:No IRQ[%s]: %d\n",
486 qinst->queue_id, qinst->proxy_id,
487 of_rx_irq_name, qinst->irq);
492 /* With the expectation that the IRQ might be shared in SoC */
493 ret = request_irq(qinst->irq, ti_msgmgr_queue_rx_interrupt,
494 IRQF_SHARED, qinst->name, chan);
496 dev_err(dev, "Unable to get IRQ %d on %s(res=%d)\n",
497 qinst->irq, qinst->name, ret);
504 * ti_msgmgr_queue_startup() - Startup queue
505 * @chan: Channel pointer
507 * Return: 0 if all goes good, else return corresponding error message
509 static int ti_msgmgr_queue_startup(struct mbox_chan *chan)
511 struct device *dev = chan->mbox->dev;
512 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
513 struct ti_queue_inst *qinst = chan->con_priv;
514 const struct ti_msgmgr_desc *d = inst->desc;
519 * If sproxy is starting and can send messages, we are a Tx thread,
523 qinst->is_tx = (readl(qinst->queue_ctrl) &
524 SPROXY_THREAD_CTRL_DIR_MASK) ? false : true;
526 msg_count = ti_msgmgr_queue_get_num_messages(d, qinst);
528 if (!msg_count && qinst->is_tx) {
529 dev_err(dev, "%s: Cannot transmit with 0 credits!\n",
536 /* Allocate usage buffer for rx */
537 qinst->rx_buff = kzalloc(d->max_message_size, GFP_KERNEL);
541 ret = ti_msgmgr_queue_rx_irq_req(dev, d, qinst, chan);
543 kfree(qinst->rx_buff);
552 * ti_msgmgr_queue_shutdown() - Shutdown the queue
553 * @chan: Channel pointer
555 static void ti_msgmgr_queue_shutdown(struct mbox_chan *chan)
557 struct ti_queue_inst *qinst = chan->con_priv;
560 free_irq(qinst->irq, chan);
561 kfree(qinst->rx_buff);
566 * ti_msgmgr_of_xlate() - Translation of phandle to queue
567 * @mbox: Mailbox controller
568 * @p: phandle pointer
570 * Return: Mailbox channel corresponding to the queue, else return error
573 static struct mbox_chan *ti_msgmgr_of_xlate(struct mbox_controller *mbox,
574 const struct of_phandle_args *p)
576 struct ti_msgmgr_inst *inst;
577 int req_qid, req_pid;
578 struct ti_queue_inst *qinst;
579 const struct ti_msgmgr_desc *d;
582 inst = container_of(mbox, struct ti_msgmgr_inst, mbox);
584 return ERR_PTR(-EINVAL);
592 if (p->args_count != ncells) {
593 dev_err(inst->dev, "Invalid arguments in dt[%d]. Must be %d\n",
594 p->args_count, ncells);
595 return ERR_PTR(-EINVAL);
599 req_pid = p->args[0];
601 req_qid = p->args[0];
602 req_pid = p->args[1];
606 if (req_pid >= d->num_valid_queues)
608 qinst = &inst->qinsts[req_pid];
612 for (qinst = inst->qinsts, i = 0; i < inst->num_valid_queues;
614 if (req_qid == qinst->queue_id && req_pid == qinst->proxy_id)
619 dev_err(inst->dev, "Queue ID %d, Proxy ID %d is wrong on %pOFn\n",
620 req_qid, req_pid, p->np);
621 return ERR_PTR(-ENOENT);
625 * ti_msgmgr_queue_setup() - Setup data structures for each queue instance
626 * @idx: index of the queue
627 * @dev: pointer to the message manager device
628 * @np: pointer to the of node
629 * @inst: Queue instance pointer
630 * @d: Message Manager instance description data
631 * @qd: Queue description data
632 * @qinst: Queue instance pointer
633 * @chan: pointer to mailbox channel
635 * Return: 0 if all went well, else return corresponding error
637 static int ti_msgmgr_queue_setup(int idx, struct device *dev,
638 struct device_node *np,
639 struct ti_msgmgr_inst *inst,
640 const struct ti_msgmgr_desc *d,
641 const struct ti_msgmgr_valid_queue_desc *qd,
642 struct ti_queue_inst *qinst,
643 struct mbox_chan *chan)
647 qinst->proxy_id = qd->proxy_id;
648 qinst->queue_id = qd->queue_id;
650 if (qinst->queue_id > d->queue_count) {
651 dev_err(dev, "Queue Data [idx=%d] queuid %d > %d\n",
652 idx, qinst->queue_id, d->queue_count);
657 qinst->queue_buff_start = inst->queue_proxy_region +
658 SPROXY_THREAD_DATA_OFFSET(qinst->proxy_id,
660 qinst->queue_buff_end = inst->queue_proxy_region +
661 SPROXY_THREAD_DATA_OFFSET(qinst->proxy_id,
663 qinst->queue_state = inst->queue_state_debug_region +
664 SPROXY_THREAD_STATUS_OFFSET(qinst->proxy_id);
665 qinst->queue_ctrl = inst->queue_ctrl_region +
666 SPROXY_THREAD_CTRL_OFFSET(qinst->proxy_id);
668 /* XXX: DONOT read registers here!.. Some may be unusable */
670 snprintf(qinst->name, sizeof(qinst->name), "%s %s_%03d",
671 dev_name(dev), dir, qinst->proxy_id);
673 qinst->queue_buff_start = inst->queue_proxy_region +
674 Q_DATA_OFFSET(qinst->proxy_id, qinst->queue_id,
676 qinst->queue_buff_end = inst->queue_proxy_region +
677 Q_DATA_OFFSET(qinst->proxy_id, qinst->queue_id,
680 inst->queue_state_debug_region +
681 Q_STATE_OFFSET(qinst->queue_id);
682 qinst->is_tx = qd->is_tx;
683 dir = qinst->is_tx ? "tx" : "rx";
684 snprintf(qinst->name, sizeof(qinst->name), "%s %s_%03d_%03d",
685 dev_name(dev), dir, qinst->queue_id, qinst->proxy_id);
690 /* Setup an error value for IRQ - Lazy allocation */
691 qinst->irq = -EINVAL;
693 chan->con_priv = qinst;
695 dev_dbg(dev, "[%d] qidx=%d pidx=%d irq=%d q_s=%p q_e = %p\n",
696 idx, qinst->queue_id, qinst->proxy_id, qinst->irq,
697 qinst->queue_buff_start, qinst->queue_buff_end);
701 static int ti_msgmgr_queue_rx_set_polled_mode(struct ti_queue_inst *qinst, bool enable)
704 disable_irq(qinst->irq);
705 qinst->polled_rx_mode = true;
707 enable_irq(qinst->irq);
708 qinst->polled_rx_mode = false;
714 static int ti_msgmgr_suspend(struct device *dev)
716 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
717 struct ti_queue_inst *qinst;
721 * We must switch operation to polled mode now as drivers and the genpd
722 * layer may make late TI SCI calls to change clock and device states
723 * from the noirq phase of suspend.
725 for (qinst = inst->qinsts, i = 0; i < inst->num_valid_queues; qinst++, i++) {
727 ti_msgmgr_queue_rx_set_polled_mode(qinst, true);
733 static int ti_msgmgr_resume(struct device *dev)
735 struct ti_msgmgr_inst *inst = dev_get_drvdata(dev);
736 struct ti_queue_inst *qinst;
739 for (qinst = inst->qinsts, i = 0; i < inst->num_valid_queues; qinst++, i++) {
741 ti_msgmgr_queue_rx_set_polled_mode(qinst, false);
747 static DEFINE_SIMPLE_DEV_PM_OPS(ti_msgmgr_pm_ops, ti_msgmgr_suspend, ti_msgmgr_resume);
749 /* Queue operations */
750 static const struct mbox_chan_ops ti_msgmgr_chan_ops = {
751 .startup = ti_msgmgr_queue_startup,
752 .shutdown = ti_msgmgr_queue_shutdown,
753 .peek_data = ti_msgmgr_queue_peek_data,
754 .last_tx_done = ti_msgmgr_last_tx_done,
755 .send_data = ti_msgmgr_send_data,
758 /* Keystone K2G SoC integration details */
759 static const struct ti_msgmgr_valid_queue_desc k2g_valid_queues[] = {
760 {.queue_id = 0, .proxy_id = 0, .is_tx = true,},
761 {.queue_id = 1, .proxy_id = 0, .is_tx = true,},
762 {.queue_id = 2, .proxy_id = 0, .is_tx = true,},
763 {.queue_id = 3, .proxy_id = 0, .is_tx = true,},
764 {.queue_id = 5, .proxy_id = 2, .is_tx = false,},
765 {.queue_id = 56, .proxy_id = 1, .is_tx = true,},
766 {.queue_id = 57, .proxy_id = 2, .is_tx = false,},
767 {.queue_id = 58, .proxy_id = 3, .is_tx = true,},
768 {.queue_id = 59, .proxy_id = 4, .is_tx = true,},
769 {.queue_id = 60, .proxy_id = 5, .is_tx = true,},
770 {.queue_id = 61, .proxy_id = 6, .is_tx = true,},
773 static const struct ti_msgmgr_desc k2g_desc = {
775 .max_message_size = 64,
777 .data_region_name = "queue_proxy_region",
778 .status_region_name = "queue_state_debug_region",
779 .data_first_reg = 16,
781 .status_cnt_mask = Q_STATE_ENTRY_COUNT_MASK,
783 .valid_queues = k2g_valid_queues,
784 .num_valid_queues = ARRAY_SIZE(k2g_valid_queues),
788 static const struct ti_msgmgr_desc am654_desc = {
790 .num_valid_queues = 190,
791 .max_message_size = 60,
792 .data_region_name = "target_data",
793 .status_region_name = "rt",
794 .ctrl_region_name = "scfg",
797 .status_cnt_mask = SPROXY_THREAD_STATUS_COUNT_MASK,
802 static const struct of_device_id ti_msgmgr_of_match[] = {
803 {.compatible = "ti,k2g-message-manager", .data = &k2g_desc},
804 {.compatible = "ti,am654-secure-proxy", .data = &am654_desc},
808 MODULE_DEVICE_TABLE(of, ti_msgmgr_of_match);
810 static int ti_msgmgr_probe(struct platform_device *pdev)
812 struct device *dev = &pdev->dev;
813 const struct of_device_id *of_id;
814 struct device_node *np;
815 const struct ti_msgmgr_desc *desc;
816 struct ti_msgmgr_inst *inst;
817 struct ti_queue_inst *qinst;
818 struct mbox_controller *mbox;
819 struct mbox_chan *chans;
823 const struct ti_msgmgr_valid_queue_desc *queue_desc;
826 dev_err(dev, "no OF information\n");
831 of_id = of_match_device(ti_msgmgr_of_match, dev);
833 dev_err(dev, "OF data missing\n");
838 inst = devm_kzalloc(dev, sizeof(*inst), GFP_KERNEL);
845 inst->queue_proxy_region =
846 devm_platform_ioremap_resource_byname(pdev, desc->data_region_name);
847 if (IS_ERR(inst->queue_proxy_region))
848 return PTR_ERR(inst->queue_proxy_region);
850 inst->queue_state_debug_region =
851 devm_platform_ioremap_resource_byname(pdev, desc->status_region_name);
852 if (IS_ERR(inst->queue_state_debug_region))
853 return PTR_ERR(inst->queue_state_debug_region);
855 if (desc->is_sproxy) {
856 inst->queue_ctrl_region =
857 devm_platform_ioremap_resource_byname(pdev, desc->ctrl_region_name);
858 if (IS_ERR(inst->queue_ctrl_region))
859 return PTR_ERR(inst->queue_ctrl_region);
862 dev_dbg(dev, "proxy region=%p, queue_state=%p\n",
863 inst->queue_proxy_region, inst->queue_state_debug_region);
865 queue_count = desc->num_valid_queues;
866 if (!queue_count || queue_count > desc->queue_count) {
867 dev_crit(dev, "Invalid Number of queues %d. Max %d\n",
868 queue_count, desc->queue_count);
871 inst->num_valid_queues = queue_count;
873 qinst = devm_kcalloc(dev, queue_count, sizeof(*qinst), GFP_KERNEL);
876 inst->qinsts = qinst;
878 chans = devm_kcalloc(dev, queue_count, sizeof(*chans), GFP_KERNEL);
883 if (desc->is_sproxy) {
884 struct ti_msgmgr_valid_queue_desc sproxy_desc;
886 /* All proxies may be valid in Secure Proxy instance */
887 for (i = 0; i < queue_count; i++, qinst++, chans++) {
888 sproxy_desc.queue_id = 0;
889 sproxy_desc.proxy_id = i;
890 ret = ti_msgmgr_queue_setup(i, dev, np, inst,
891 desc, &sproxy_desc, qinst,
897 /* Only Some proxies are valid in Message Manager */
898 for (i = 0, queue_desc = desc->valid_queues;
899 i < queue_count; i++, qinst++, chans++, queue_desc++) {
900 ret = ti_msgmgr_queue_setup(i, dev, np, inst,
901 desc, queue_desc, qinst,
910 mbox->ops = &ti_msgmgr_chan_ops;
911 mbox->chans = inst->chans;
912 mbox->num_chans = inst->num_valid_queues;
913 mbox->txdone_irq = false;
914 mbox->txdone_poll = desc->tx_polled;
916 mbox->txpoll_period = desc->tx_poll_timeout_ms;
917 mbox->of_xlate = ti_msgmgr_of_xlate;
919 platform_set_drvdata(pdev, inst);
920 ret = devm_mbox_controller_register(dev, mbox);
922 dev_err(dev, "Failed to register mbox_controller(%d)\n", ret);
927 static struct platform_driver ti_msgmgr_driver = {
928 .probe = ti_msgmgr_probe,
931 .of_match_table = of_match_ptr(ti_msgmgr_of_match),
932 .pm = &ti_msgmgr_pm_ops,
935 module_platform_driver(ti_msgmgr_driver);
937 MODULE_LICENSE("GPL v2");
938 MODULE_DESCRIPTION("TI message manager driver");
939 MODULE_AUTHOR("Nishanth Menon");
940 MODULE_ALIAS("platform:ti-msgmgr");