1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016-2023, NVIDIA CORPORATION. All rights reserved.
6 #include <linux/delay.h>
7 #include <linux/interrupt.h>
9 #include <linux/mailbox_controller.h>
11 #include <linux/platform_device.h>
13 #include <linux/slab.h>
15 #include <soc/tegra/fuse.h>
17 #include <dt-bindings/mailbox/tegra186-hsp.h>
21 #define HSP_INT_IE(x) (0x100 + ((x) * 4))
22 #define HSP_INT_IV 0x300
23 #define HSP_INT_IR 0x304
25 #define HSP_INT_EMPTY_SHIFT 0
26 #define HSP_INT_EMPTY_MASK 0xff
27 #define HSP_INT_FULL_SHIFT 8
28 #define HSP_INT_FULL_MASK 0xff
30 #define HSP_INT_DIMENSIONING 0x380
31 #define HSP_nSM_SHIFT 0
32 #define HSP_nSS_SHIFT 4
33 #define HSP_nAS_SHIFT 8
34 #define HSP_nDB_SHIFT 12
35 #define HSP_nSI_SHIFT 16
36 #define HSP_nINT_MASK 0xf
38 #define HSP_DB_TRIGGER 0x0
39 #define HSP_DB_ENABLE 0x4
40 #define HSP_DB_RAW 0x8
41 #define HSP_DB_PENDING 0xc
43 #define HSP_SM_SHRD_MBOX 0x0
44 #define HSP_SM_SHRD_MBOX_FULL BIT(31)
45 #define HSP_SM_SHRD_MBOX_FULL_INT_IE 0x04
46 #define HSP_SM_SHRD_MBOX_EMPTY_INT_IE 0x08
48 #define HSP_SHRD_MBOX_TYPE1_TAG 0x40
49 #define HSP_SHRD_MBOX_TYPE1_DATA0 0x48
50 #define HSP_SHRD_MBOX_TYPE1_DATA1 0x4c
51 #define HSP_SHRD_MBOX_TYPE1_DATA2 0x50
52 #define HSP_SHRD_MBOX_TYPE1_DATA3 0x54
54 #define HSP_DB_CCPLEX 1
58 #define HSP_MBOX_TYPE_MASK 0xff
60 struct tegra_hsp_channel;
63 struct tegra_hsp_channel {
64 struct tegra_hsp *hsp;
65 struct mbox_chan *chan;
69 struct tegra_hsp_doorbell {
70 struct tegra_hsp_channel channel;
71 struct list_head list;
77 struct tegra_hsp_sm_ops {
78 void (*send)(struct tegra_hsp_channel *channel, void *data);
79 void (*recv)(struct tegra_hsp_channel *channel);
82 struct tegra_hsp_mailbox {
83 struct tegra_hsp_channel channel;
84 const struct tegra_hsp_sm_ops *ops;
89 struct tegra_hsp_db_map {
95 struct tegra_hsp_soc {
96 const struct tegra_hsp_db_map *map;
99 unsigned int reg_stride;
104 const struct tegra_hsp_soc *soc;
105 struct mbox_controller mbox_db;
106 struct mbox_controller mbox_sm;
108 unsigned int doorbell_irq;
109 unsigned int *shared_irqs;
110 unsigned int shared_irq;
118 struct lock_class_key lock_key;
120 struct list_head doorbells;
121 struct tegra_hsp_mailbox *mailboxes;
126 static inline u32 tegra_hsp_readl(struct tegra_hsp *hsp, unsigned int offset)
128 return readl(hsp->regs + offset);
131 static inline void tegra_hsp_writel(struct tegra_hsp *hsp, u32 value,
134 writel(value, hsp->regs + offset);
137 static inline u32 tegra_hsp_channel_readl(struct tegra_hsp_channel *channel,
140 return readl(channel->regs + offset);
143 static inline void tegra_hsp_channel_writel(struct tegra_hsp_channel *channel,
144 u32 value, unsigned int offset)
146 writel(value, channel->regs + offset);
149 static bool tegra_hsp_doorbell_can_ring(struct tegra_hsp_doorbell *db)
153 value = tegra_hsp_channel_readl(&db->channel, HSP_DB_ENABLE);
155 return (value & BIT(TEGRA_HSP_DB_MASTER_CCPLEX)) != 0;
158 static struct tegra_hsp_doorbell *
159 __tegra_hsp_doorbell_get(struct tegra_hsp *hsp, unsigned int master)
161 struct tegra_hsp_doorbell *entry;
163 list_for_each_entry(entry, &hsp->doorbells, list)
164 if (entry->master == master)
170 static struct tegra_hsp_doorbell *
171 tegra_hsp_doorbell_get(struct tegra_hsp *hsp, unsigned int master)
173 struct tegra_hsp_doorbell *db;
176 spin_lock_irqsave(&hsp->lock, flags);
177 db = __tegra_hsp_doorbell_get(hsp, master);
178 spin_unlock_irqrestore(&hsp->lock, flags);
183 static irqreturn_t tegra_hsp_doorbell_irq(int irq, void *data)
185 struct tegra_hsp *hsp = data;
186 struct tegra_hsp_doorbell *db;
187 unsigned long master, value;
189 db = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
193 value = tegra_hsp_channel_readl(&db->channel, HSP_DB_PENDING);
194 tegra_hsp_channel_writel(&db->channel, value, HSP_DB_PENDING);
196 spin_lock(&hsp->lock);
198 for_each_set_bit(master, &value, hsp->mbox_db.num_chans) {
199 struct tegra_hsp_doorbell *db;
201 db = __tegra_hsp_doorbell_get(hsp, master);
203 * Depending on the bootloader chain, the CCPLEX doorbell will
204 * have some doorbells enabled, which means that requesting an
205 * interrupt will immediately fire.
207 * In that case, db->channel.chan will still be NULL here and
208 * cause a crash if not properly guarded.
210 * It remains to be seen if ignoring the doorbell in that case
211 * is the correct solution.
213 if (db && db->channel.chan)
214 mbox_chan_received_data(db->channel.chan, NULL);
217 spin_unlock(&hsp->lock);
222 static irqreturn_t tegra_hsp_shared_irq(int irq, void *data)
224 struct tegra_hsp *hsp = data;
225 unsigned long bit, mask;
228 status = tegra_hsp_readl(hsp, HSP_INT_IR) & hsp->mask;
230 /* process EMPTY interrupts first */
231 mask = (status >> HSP_INT_EMPTY_SHIFT) & HSP_INT_EMPTY_MASK;
233 for_each_set_bit(bit, &mask, hsp->num_sm) {
234 struct tegra_hsp_mailbox *mb = &hsp->mailboxes[bit];
238 * Disable EMPTY interrupts until data is sent with
239 * the next message. These interrupts are level-
240 * triggered, so if we kept them enabled they would
241 * constantly trigger until we next write data into
244 spin_lock(&hsp->lock);
246 hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
247 tegra_hsp_writel(hsp, hsp->mask,
248 HSP_INT_IE(hsp->shared_irq));
250 spin_unlock(&hsp->lock);
252 mbox_chan_txdone(mb->channel.chan, 0);
256 /* process FULL interrupts */
257 mask = (status >> HSP_INT_FULL_SHIFT) & HSP_INT_FULL_MASK;
259 for_each_set_bit(bit, &mask, hsp->num_sm) {
260 struct tegra_hsp_mailbox *mb = &hsp->mailboxes[bit];
263 mb->ops->recv(&mb->channel);
269 static struct tegra_hsp_channel *
270 tegra_hsp_doorbell_create(struct tegra_hsp *hsp, const char *name,
271 unsigned int master, unsigned int index)
273 struct tegra_hsp_doorbell *db;
277 db = devm_kzalloc(hsp->dev, sizeof(*db), GFP_KERNEL);
279 return ERR_PTR(-ENOMEM);
281 offset = (1 + (hsp->num_sm / 2) + hsp->num_ss + hsp->num_as) * SZ_64K;
282 offset += index * hsp->soc->reg_stride;
284 db->channel.regs = hsp->regs + offset;
285 db->channel.hsp = hsp;
287 db->name = devm_kstrdup_const(hsp->dev, name, GFP_KERNEL);
291 spin_lock_irqsave(&hsp->lock, flags);
292 list_add_tail(&db->list, &hsp->doorbells);
293 spin_unlock_irqrestore(&hsp->lock, flags);
298 static int tegra_hsp_doorbell_send_data(struct mbox_chan *chan, void *data)
300 struct tegra_hsp_doorbell *db = chan->con_priv;
302 tegra_hsp_channel_writel(&db->channel, 1, HSP_DB_TRIGGER);
307 static int tegra_hsp_doorbell_startup(struct mbox_chan *chan)
309 struct tegra_hsp_doorbell *db = chan->con_priv;
310 struct tegra_hsp *hsp = db->channel.hsp;
311 struct tegra_hsp_doorbell *ccplex;
315 if (db->master >= chan->mbox->num_chans) {
316 dev_err(chan->mbox->dev,
317 "invalid master ID %u for HSP channel\n",
322 ccplex = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
327 * On simulation platforms the BPMP hasn't had a chance yet to mark
328 * the doorbell as ringable by the CCPLEX, so we want to skip extra
331 if (tegra_is_silicon() && !tegra_hsp_doorbell_can_ring(db))
334 spin_lock_irqsave(&hsp->lock, flags);
336 value = tegra_hsp_channel_readl(&ccplex->channel, HSP_DB_ENABLE);
337 value |= BIT(db->master);
338 tegra_hsp_channel_writel(&ccplex->channel, value, HSP_DB_ENABLE);
340 spin_unlock_irqrestore(&hsp->lock, flags);
345 static void tegra_hsp_doorbell_shutdown(struct mbox_chan *chan)
347 struct tegra_hsp_doorbell *db = chan->con_priv;
348 struct tegra_hsp *hsp = db->channel.hsp;
349 struct tegra_hsp_doorbell *ccplex;
353 ccplex = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
357 spin_lock_irqsave(&hsp->lock, flags);
359 value = tegra_hsp_channel_readl(&ccplex->channel, HSP_DB_ENABLE);
360 value &= ~BIT(db->master);
361 tegra_hsp_channel_writel(&ccplex->channel, value, HSP_DB_ENABLE);
363 spin_unlock_irqrestore(&hsp->lock, flags);
366 static const struct mbox_chan_ops tegra_hsp_db_ops = {
367 .send_data = tegra_hsp_doorbell_send_data,
368 .startup = tegra_hsp_doorbell_startup,
369 .shutdown = tegra_hsp_doorbell_shutdown,
372 static void tegra_hsp_sm_send32(struct tegra_hsp_channel *channel, void *data)
376 /* copy data and mark mailbox full */
377 value = (u32)(unsigned long)data;
378 value |= HSP_SM_SHRD_MBOX_FULL;
380 tegra_hsp_channel_writel(channel, value, HSP_SM_SHRD_MBOX);
383 static void tegra_hsp_sm_recv32(struct tegra_hsp_channel *channel)
388 value = tegra_hsp_channel_readl(channel, HSP_SM_SHRD_MBOX);
389 value &= ~HSP_SM_SHRD_MBOX_FULL;
390 msg = (void *)(unsigned long)value;
391 mbox_chan_received_data(channel->chan, msg);
394 * Need to clear all bits here since some producers, such as TCU, depend
395 * on fields in the register getting cleared by the consumer.
397 * The mailbox API doesn't give the consumers a way of doing that
398 * explicitly, so we have to make sure we cover all possible cases.
400 tegra_hsp_channel_writel(channel, 0x0, HSP_SM_SHRD_MBOX);
403 static const struct tegra_hsp_sm_ops tegra_hsp_sm_32bit_ops = {
404 .send = tegra_hsp_sm_send32,
405 .recv = tegra_hsp_sm_recv32,
408 static void tegra_hsp_sm_send128(struct tegra_hsp_channel *channel, void *data)
412 memcpy(value, data, sizeof(value));
415 tegra_hsp_channel_writel(channel, value[0], HSP_SHRD_MBOX_TYPE1_DATA0);
416 tegra_hsp_channel_writel(channel, value[1], HSP_SHRD_MBOX_TYPE1_DATA1);
417 tegra_hsp_channel_writel(channel, value[2], HSP_SHRD_MBOX_TYPE1_DATA2);
418 tegra_hsp_channel_writel(channel, value[3], HSP_SHRD_MBOX_TYPE1_DATA3);
420 /* Update tag to mark mailbox full */
421 tegra_hsp_channel_writel(channel, HSP_SM_SHRD_MBOX_FULL,
422 HSP_SHRD_MBOX_TYPE1_TAG);
425 static void tegra_hsp_sm_recv128(struct tegra_hsp_channel *channel)
430 value[0] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA0);
431 value[1] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA1);
432 value[2] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA2);
433 value[3] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA3);
435 msg = (void *)(unsigned long)value;
436 mbox_chan_received_data(channel->chan, msg);
439 * Clear data registers and tag.
441 tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA0);
442 tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA1);
443 tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA2);
444 tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA3);
445 tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_TAG);
448 static const struct tegra_hsp_sm_ops tegra_hsp_sm_128bit_ops = {
449 .send = tegra_hsp_sm_send128,
450 .recv = tegra_hsp_sm_recv128,
453 static int tegra_hsp_mailbox_send_data(struct mbox_chan *chan, void *data)
455 struct tegra_hsp_mailbox *mb = chan->con_priv;
456 struct tegra_hsp *hsp = mb->channel.hsp;
459 if (WARN_ON(!mb->producer))
462 mb->ops->send(&mb->channel, data);
464 /* enable EMPTY interrupt for the shared mailbox */
465 spin_lock_irqsave(&hsp->lock, flags);
467 hsp->mask |= BIT(HSP_INT_EMPTY_SHIFT + mb->index);
468 tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
470 spin_unlock_irqrestore(&hsp->lock, flags);
475 static int tegra_hsp_mailbox_flush(struct mbox_chan *chan,
476 unsigned long timeout)
478 struct tegra_hsp_mailbox *mb = chan->con_priv;
479 struct tegra_hsp_channel *ch = &mb->channel;
482 timeout = jiffies + msecs_to_jiffies(timeout);
484 while (time_before(jiffies, timeout)) {
485 value = tegra_hsp_channel_readl(ch, HSP_SM_SHRD_MBOX);
486 if ((value & HSP_SM_SHRD_MBOX_FULL) == 0) {
487 mbox_chan_txdone(chan, 0);
489 /* Wait until channel is empty */
490 if (chan->active_req != NULL)
502 static int tegra_hsp_mailbox_startup(struct mbox_chan *chan)
504 struct tegra_hsp_mailbox *mb = chan->con_priv;
505 struct tegra_hsp_channel *ch = &mb->channel;
506 struct tegra_hsp *hsp = mb->channel.hsp;
509 chan->txdone_method = TXDONE_BY_IRQ;
512 * Shared mailboxes start out as consumers by default. FULL and EMPTY
513 * interrupts are coalesced at the same shared interrupt.
515 * Keep EMPTY interrupts disabled at startup and only enable them when
516 * the mailbox is actually full. This is required because the FULL and
517 * EMPTY interrupts are level-triggered, so keeping EMPTY interrupts
518 * enabled all the time would cause an interrupt storm while mailboxes
522 spin_lock_irqsave(&hsp->lock, flags);
525 hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
527 hsp->mask |= BIT(HSP_INT_FULL_SHIFT + mb->index);
529 tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
531 spin_unlock_irqrestore(&hsp->lock, flags);
533 if (hsp->soc->has_per_mb_ie) {
535 tegra_hsp_channel_writel(ch, 0x0,
536 HSP_SM_SHRD_MBOX_EMPTY_INT_IE);
538 tegra_hsp_channel_writel(ch, 0x1,
539 HSP_SM_SHRD_MBOX_FULL_INT_IE);
545 static void tegra_hsp_mailbox_shutdown(struct mbox_chan *chan)
547 struct tegra_hsp_mailbox *mb = chan->con_priv;
548 struct tegra_hsp_channel *ch = &mb->channel;
549 struct tegra_hsp *hsp = mb->channel.hsp;
552 if (hsp->soc->has_per_mb_ie) {
554 tegra_hsp_channel_writel(ch, 0x0,
555 HSP_SM_SHRD_MBOX_EMPTY_INT_IE);
557 tegra_hsp_channel_writel(ch, 0x0,
558 HSP_SM_SHRD_MBOX_FULL_INT_IE);
561 spin_lock_irqsave(&hsp->lock, flags);
564 hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
566 hsp->mask &= ~BIT(HSP_INT_FULL_SHIFT + mb->index);
568 tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
570 spin_unlock_irqrestore(&hsp->lock, flags);
573 static const struct mbox_chan_ops tegra_hsp_sm_ops = {
574 .send_data = tegra_hsp_mailbox_send_data,
575 .flush = tegra_hsp_mailbox_flush,
576 .startup = tegra_hsp_mailbox_startup,
577 .shutdown = tegra_hsp_mailbox_shutdown,
580 static struct mbox_chan *tegra_hsp_db_xlate(struct mbox_controller *mbox,
581 const struct of_phandle_args *args)
583 struct tegra_hsp *hsp = container_of(mbox, struct tegra_hsp, mbox_db);
584 unsigned int type = args->args[0], master = args->args[1];
585 struct tegra_hsp_channel *channel = ERR_PTR(-ENODEV);
586 struct tegra_hsp_doorbell *db;
587 struct mbox_chan *chan;
591 if (type != TEGRA_HSP_MBOX_TYPE_DB || !hsp->doorbell_irq)
592 return ERR_PTR(-ENODEV);
594 db = tegra_hsp_doorbell_get(hsp, master);
596 channel = &db->channel;
599 return ERR_CAST(channel);
601 spin_lock_irqsave(&hsp->lock, flags);
603 for (i = 0; i < mbox->num_chans; i++) {
604 chan = &mbox->chans[i];
605 if (!chan->con_priv) {
606 channel->chan = chan;
614 spin_unlock_irqrestore(&hsp->lock, flags);
616 return chan ?: ERR_PTR(-EBUSY);
619 static struct mbox_chan *tegra_hsp_sm_xlate(struct mbox_controller *mbox,
620 const struct of_phandle_args *args)
622 struct tegra_hsp *hsp = container_of(mbox, struct tegra_hsp, mbox_sm);
623 unsigned int type = args->args[0], index;
624 struct tegra_hsp_mailbox *mb;
626 index = args->args[1] & TEGRA_HSP_SM_MASK;
628 if ((type & HSP_MBOX_TYPE_MASK) != TEGRA_HSP_MBOX_TYPE_SM ||
629 !hsp->shared_irqs || index >= hsp->num_sm)
630 return ERR_PTR(-ENODEV);
632 mb = &hsp->mailboxes[index];
634 if (type & TEGRA_HSP_MBOX_TYPE_SM_128BIT) {
635 if (!hsp->soc->has_128_bit_mb)
636 return ERR_PTR(-ENODEV);
638 mb->ops = &tegra_hsp_sm_128bit_ops;
640 mb->ops = &tegra_hsp_sm_32bit_ops;
643 if ((args->args[1] & TEGRA_HSP_SM_FLAG_TX) == 0)
644 mb->producer = false;
648 return mb->channel.chan;
651 static int tegra_hsp_add_doorbells(struct tegra_hsp *hsp)
653 const struct tegra_hsp_db_map *map = hsp->soc->map;
654 struct tegra_hsp_channel *channel;
657 channel = tegra_hsp_doorbell_create(hsp, map->name,
658 map->master, map->index);
660 return PTR_ERR(channel);
668 static int tegra_hsp_add_mailboxes(struct tegra_hsp *hsp, struct device *dev)
672 hsp->mailboxes = devm_kcalloc(dev, hsp->num_sm, sizeof(*hsp->mailboxes),
677 for (i = 0; i < hsp->num_sm; i++) {
678 struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
682 mb->channel.hsp = hsp;
683 mb->channel.regs = hsp->regs + SZ_64K + i * SZ_32K;
684 mb->channel.chan = &hsp->mbox_sm.chans[i];
685 mb->channel.chan->con_priv = mb;
691 static int tegra_hsp_request_shared_irq(struct tegra_hsp *hsp)
693 unsigned int i, irq = 0;
696 for (i = 0; i < hsp->num_si; i++) {
697 irq = hsp->shared_irqs[i];
701 err = devm_request_irq(hsp->dev, irq, tegra_hsp_shared_irq, 0,
702 dev_name(hsp->dev), hsp);
704 dev_err(hsp->dev, "failed to request interrupt: %d\n",
711 /* disable all interrupts */
712 tegra_hsp_writel(hsp, 0, HSP_INT_IE(hsp->shared_irq));
714 dev_dbg(hsp->dev, "interrupt requested: %u\n", irq);
719 if (i == hsp->num_si) {
720 dev_err(hsp->dev, "failed to find available interrupt\n");
727 static int tegra_hsp_probe(struct platform_device *pdev)
729 struct tegra_hsp *hsp;
734 hsp = devm_kzalloc(&pdev->dev, sizeof(*hsp), GFP_KERNEL);
738 hsp->dev = &pdev->dev;
739 hsp->soc = of_device_get_match_data(&pdev->dev);
740 INIT_LIST_HEAD(&hsp->doorbells);
741 spin_lock_init(&hsp->lock);
743 hsp->regs = devm_platform_ioremap_resource(pdev, 0);
744 if (IS_ERR(hsp->regs))
745 return PTR_ERR(hsp->regs);
747 value = tegra_hsp_readl(hsp, HSP_INT_DIMENSIONING);
748 hsp->num_sm = (value >> HSP_nSM_SHIFT) & HSP_nINT_MASK;
749 hsp->num_ss = (value >> HSP_nSS_SHIFT) & HSP_nINT_MASK;
750 hsp->num_as = (value >> HSP_nAS_SHIFT) & HSP_nINT_MASK;
751 hsp->num_db = (value >> HSP_nDB_SHIFT) & HSP_nINT_MASK;
752 hsp->num_si = (value >> HSP_nSI_SHIFT) & HSP_nINT_MASK;
754 err = platform_get_irq_byname_optional(pdev, "doorbell");
756 hsp->doorbell_irq = err;
758 if (hsp->num_si > 0) {
759 unsigned int count = 0;
761 hsp->shared_irqs = devm_kcalloc(&pdev->dev, hsp->num_si,
762 sizeof(*hsp->shared_irqs),
764 if (!hsp->shared_irqs)
767 for (i = 0; i < hsp->num_si; i++) {
770 name = kasprintf(GFP_KERNEL, "shared%u", i);
774 err = platform_get_irq_byname_optional(pdev, name);
776 hsp->shared_irqs[i] = err;
784 devm_kfree(&pdev->dev, hsp->shared_irqs);
785 hsp->shared_irqs = NULL;
789 /* setup the doorbell controller */
790 hsp->mbox_db.of_xlate = tegra_hsp_db_xlate;
791 hsp->mbox_db.num_chans = 32;
792 hsp->mbox_db.dev = &pdev->dev;
793 hsp->mbox_db.ops = &tegra_hsp_db_ops;
795 hsp->mbox_db.chans = devm_kcalloc(&pdev->dev, hsp->mbox_db.num_chans,
796 sizeof(*hsp->mbox_db.chans),
798 if (!hsp->mbox_db.chans)
801 if (hsp->doorbell_irq) {
802 err = tegra_hsp_add_doorbells(hsp);
804 dev_err(&pdev->dev, "failed to add doorbells: %d\n",
810 err = devm_mbox_controller_register(&pdev->dev, &hsp->mbox_db);
812 dev_err(&pdev->dev, "failed to register doorbell mailbox: %d\n",
817 /* setup the shared mailbox controller */
818 hsp->mbox_sm.of_xlate = tegra_hsp_sm_xlate;
819 hsp->mbox_sm.num_chans = hsp->num_sm;
820 hsp->mbox_sm.dev = &pdev->dev;
821 hsp->mbox_sm.ops = &tegra_hsp_sm_ops;
823 hsp->mbox_sm.chans = devm_kcalloc(&pdev->dev, hsp->mbox_sm.num_chans,
824 sizeof(*hsp->mbox_sm.chans),
826 if (!hsp->mbox_sm.chans)
829 if (hsp->shared_irqs) {
830 err = tegra_hsp_add_mailboxes(hsp, &pdev->dev);
832 dev_err(&pdev->dev, "failed to add mailboxes: %d\n",
838 err = devm_mbox_controller_register(&pdev->dev, &hsp->mbox_sm);
840 dev_err(&pdev->dev, "failed to register shared mailbox: %d\n",
845 platform_set_drvdata(pdev, hsp);
847 if (hsp->doorbell_irq) {
848 err = devm_request_irq(&pdev->dev, hsp->doorbell_irq,
849 tegra_hsp_doorbell_irq, IRQF_NO_SUSPEND,
850 dev_name(&pdev->dev), hsp);
853 "failed to request doorbell IRQ#%u: %d\n",
854 hsp->doorbell_irq, err);
859 if (hsp->shared_irqs) {
860 err = tegra_hsp_request_shared_irq(hsp);
865 lockdep_register_key(&hsp->lock_key);
866 lockdep_set_class(&hsp->lock, &hsp->lock_key);
871 static int tegra_hsp_remove(struct platform_device *pdev)
873 struct tegra_hsp *hsp = platform_get_drvdata(pdev);
875 lockdep_unregister_key(&hsp->lock_key);
880 static int __maybe_unused tegra_hsp_resume(struct device *dev)
882 struct tegra_hsp *hsp = dev_get_drvdata(dev);
884 struct tegra_hsp_doorbell *db;
886 list_for_each_entry(db, &hsp->doorbells, list) {
887 if (db->channel.chan)
888 tegra_hsp_doorbell_startup(db->channel.chan);
891 if (hsp->mailboxes) {
892 for (i = 0; i < hsp->num_sm; i++) {
893 struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
895 if (mb->channel.chan->cl)
896 tegra_hsp_mailbox_startup(mb->channel.chan);
903 static const struct dev_pm_ops tegra_hsp_pm_ops = {
904 .resume_noirq = tegra_hsp_resume,
907 static const struct tegra_hsp_db_map tegra186_hsp_db_map[] = {
908 { "ccplex", TEGRA_HSP_DB_MASTER_CCPLEX, HSP_DB_CCPLEX, },
909 { "bpmp", TEGRA_HSP_DB_MASTER_BPMP, HSP_DB_BPMP, },
913 static const struct tegra_hsp_soc tegra186_hsp_soc = {
914 .map = tegra186_hsp_db_map,
915 .has_per_mb_ie = false,
916 .has_128_bit_mb = false,
920 static const struct tegra_hsp_soc tegra194_hsp_soc = {
921 .map = tegra186_hsp_db_map,
922 .has_per_mb_ie = true,
923 .has_128_bit_mb = false,
927 static const struct tegra_hsp_soc tegra234_hsp_soc = {
928 .map = tegra186_hsp_db_map,
929 .has_per_mb_ie = false,
930 .has_128_bit_mb = true,
934 static const struct tegra_hsp_soc tegra264_hsp_soc = {
935 .map = tegra186_hsp_db_map,
936 .has_per_mb_ie = false,
937 .has_128_bit_mb = true,
938 .reg_stride = 0x1000,
941 static const struct of_device_id tegra_hsp_match[] = {
942 { .compatible = "nvidia,tegra186-hsp", .data = &tegra186_hsp_soc },
943 { .compatible = "nvidia,tegra194-hsp", .data = &tegra194_hsp_soc },
944 { .compatible = "nvidia,tegra234-hsp", .data = &tegra234_hsp_soc },
945 { .compatible = "nvidia,tegra264-hsp", .data = &tegra264_hsp_soc },
949 static struct platform_driver tegra_hsp_driver = {
952 .of_match_table = tegra_hsp_match,
953 .pm = &tegra_hsp_pm_ops,
955 .probe = tegra_hsp_probe,
956 .remove = tegra_hsp_remove,
959 static int __init tegra_hsp_init(void)
961 return platform_driver_register(&tegra_hsp_driver);
963 core_initcall(tegra_hsp_init);