linux-stable/drivers/mailbox/tegra-hsp.c
Jon Hunter c745da8d43 mailbox: tegra: Fix superfluous IRQ error message
Commit 7723f4c5ec ("driver core: platform: Add an error message to
platform_get_irq*()") added an error message to avoid drivers having
to print an error message when IRQ lookup fails. However, there are
some cases where IRQs are optional and so new optional versions of
the platform_get_irq*() APIs have been added for these cases.

The IRQs for Tegra HSP module are optional because not all instances
of the module have the doorbell and all of the shared interrupts.
Hence, since the above commit was applied the following error messages
are now seen on Tegra194 ...

 ERR KERN tegra-hsp c150000.hsp: IRQ doorbell not found
 ERR KERN tegra-hsp c150000.hsp: IRQ shared0 not found

The Tegra HSP driver deliberately does not fail if these are not found
and so fix the above errors by updating the Tegra HSP driver to use
the platform_get_irq_byname_optional() API.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191011083459.11551-1-jonathanh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-12 15:09:19 +01:00

836 lines
20 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/mailbox_controller.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <dt-bindings/mailbox/tegra186-hsp.h>
#include "mailbox.h"
#define HSP_INT_IE(x) (0x100 + ((x) * 4))
#define HSP_INT_IV 0x300
#define HSP_INT_IR 0x304
#define HSP_INT_EMPTY_SHIFT 0
#define HSP_INT_EMPTY_MASK 0xff
#define HSP_INT_FULL_SHIFT 8
#define HSP_INT_FULL_MASK 0xff
#define HSP_INT_DIMENSIONING 0x380
#define HSP_nSM_SHIFT 0
#define HSP_nSS_SHIFT 4
#define HSP_nAS_SHIFT 8
#define HSP_nDB_SHIFT 12
#define HSP_nSI_SHIFT 16
#define HSP_nINT_MASK 0xf
#define HSP_DB_TRIGGER 0x0
#define HSP_DB_ENABLE 0x4
#define HSP_DB_RAW 0x8
#define HSP_DB_PENDING 0xc
#define HSP_SM_SHRD_MBOX 0x0
#define HSP_SM_SHRD_MBOX_FULL BIT(31)
#define HSP_SM_SHRD_MBOX_FULL_INT_IE 0x04
#define HSP_SM_SHRD_MBOX_EMPTY_INT_IE 0x08
#define HSP_DB_CCPLEX 1
#define HSP_DB_BPMP 3
#define HSP_DB_MAX 7
struct tegra_hsp_channel;
struct tegra_hsp;
struct tegra_hsp_channel {
struct tegra_hsp *hsp;
struct mbox_chan *chan;
void __iomem *regs;
};
struct tegra_hsp_doorbell {
struct tegra_hsp_channel channel;
struct list_head list;
const char *name;
unsigned int master;
unsigned int index;
};
struct tegra_hsp_mailbox {
struct tegra_hsp_channel channel;
unsigned int index;
bool producer;
};
struct tegra_hsp_db_map {
const char *name;
unsigned int master;
unsigned int index;
};
struct tegra_hsp_soc {
const struct tegra_hsp_db_map *map;
bool has_per_mb_ie;
};
struct tegra_hsp {
struct device *dev;
const struct tegra_hsp_soc *soc;
struct mbox_controller mbox_db;
struct mbox_controller mbox_sm;
void __iomem *regs;
unsigned int doorbell_irq;
unsigned int *shared_irqs;
unsigned int shared_irq;
unsigned int num_sm;
unsigned int num_as;
unsigned int num_ss;
unsigned int num_db;
unsigned int num_si;
spinlock_t lock;
struct list_head doorbells;
struct tegra_hsp_mailbox *mailboxes;
unsigned long mask;
};
static inline u32 tegra_hsp_readl(struct tegra_hsp *hsp, unsigned int offset)
{
return readl(hsp->regs + offset);
}
static inline void tegra_hsp_writel(struct tegra_hsp *hsp, u32 value,
unsigned int offset)
{
writel(value, hsp->regs + offset);
}
static inline u32 tegra_hsp_channel_readl(struct tegra_hsp_channel *channel,
unsigned int offset)
{
return readl(channel->regs + offset);
}
static inline void tegra_hsp_channel_writel(struct tegra_hsp_channel *channel,
u32 value, unsigned int offset)
{
writel(value, channel->regs + offset);
}
static bool tegra_hsp_doorbell_can_ring(struct tegra_hsp_doorbell *db)
{
u32 value;
value = tegra_hsp_channel_readl(&db->channel, HSP_DB_ENABLE);
return (value & BIT(TEGRA_HSP_DB_MASTER_CCPLEX)) != 0;
}
static struct tegra_hsp_doorbell *
__tegra_hsp_doorbell_get(struct tegra_hsp *hsp, unsigned int master)
{
struct tegra_hsp_doorbell *entry;
list_for_each_entry(entry, &hsp->doorbells, list)
if (entry->master == master)
return entry;
return NULL;
}
static struct tegra_hsp_doorbell *
tegra_hsp_doorbell_get(struct tegra_hsp *hsp, unsigned int master)
{
struct tegra_hsp_doorbell *db;
unsigned long flags;
spin_lock_irqsave(&hsp->lock, flags);
db = __tegra_hsp_doorbell_get(hsp, master);
spin_unlock_irqrestore(&hsp->lock, flags);
return db;
}
static irqreturn_t tegra_hsp_doorbell_irq(int irq, void *data)
{
struct tegra_hsp *hsp = data;
struct tegra_hsp_doorbell *db;
unsigned long master, value;
db = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
if (!db)
return IRQ_NONE;
value = tegra_hsp_channel_readl(&db->channel, HSP_DB_PENDING);
tegra_hsp_channel_writel(&db->channel, value, HSP_DB_PENDING);
spin_lock(&hsp->lock);
for_each_set_bit(master, &value, hsp->mbox_db.num_chans) {
struct tegra_hsp_doorbell *db;
db = __tegra_hsp_doorbell_get(hsp, master);
/*
* Depending on the bootloader chain, the CCPLEX doorbell will
* have some doorbells enabled, which means that requesting an
* interrupt will immediately fire.
*
* In that case, db->channel.chan will still be NULL here and
* cause a crash if not properly guarded.
*
* It remains to be seen if ignoring the doorbell in that case
* is the correct solution.
*/
if (db && db->channel.chan)
mbox_chan_received_data(db->channel.chan, NULL);
}
spin_unlock(&hsp->lock);
return IRQ_HANDLED;
}
static irqreturn_t tegra_hsp_shared_irq(int irq, void *data)
{
struct tegra_hsp *hsp = data;
unsigned long bit, mask;
u32 status, value;
void *msg;
status = tegra_hsp_readl(hsp, HSP_INT_IR) & hsp->mask;
/* process EMPTY interrupts first */
mask = (status >> HSP_INT_EMPTY_SHIFT) & HSP_INT_EMPTY_MASK;
for_each_set_bit(bit, &mask, hsp->num_sm) {
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[bit];
if (mb->producer) {
/*
* Disable EMPTY interrupts until data is sent with
* the next message. These interrupts are level-
* triggered, so if we kept them enabled they would
* constantly trigger until we next write data into
* the message.
*/
spin_lock(&hsp->lock);
hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
tegra_hsp_writel(hsp, hsp->mask,
HSP_INT_IE(hsp->shared_irq));
spin_unlock(&hsp->lock);
mbox_chan_txdone(mb->channel.chan, 0);
}
}
/* process FULL interrupts */
mask = (status >> HSP_INT_FULL_SHIFT) & HSP_INT_FULL_MASK;
for_each_set_bit(bit, &mask, hsp->num_sm) {
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[bit];
if (!mb->producer) {
value = tegra_hsp_channel_readl(&mb->channel,
HSP_SM_SHRD_MBOX);
value &= ~HSP_SM_SHRD_MBOX_FULL;
msg = (void *)(unsigned long)value;
mbox_chan_received_data(mb->channel.chan, msg);
/*
* Need to clear all bits here since some producers,
* such as TCU, depend on fields in the register
* getting cleared by the consumer.
*
* The mailbox API doesn't give the consumers a way
* of doing that explicitly, so we have to make sure
* we cover all possible cases.
*/
tegra_hsp_channel_writel(&mb->channel, 0x0,
HSP_SM_SHRD_MBOX);
}
}
return IRQ_HANDLED;
}
static struct tegra_hsp_channel *
tegra_hsp_doorbell_create(struct tegra_hsp *hsp, const char *name,
unsigned int master, unsigned int index)
{
struct tegra_hsp_doorbell *db;
unsigned int offset;
unsigned long flags;
db = devm_kzalloc(hsp->dev, sizeof(*db), GFP_KERNEL);
if (!db)
return ERR_PTR(-ENOMEM);
offset = (1 + (hsp->num_sm / 2) + hsp->num_ss + hsp->num_as) * SZ_64K;
offset += index * 0x100;
db->channel.regs = hsp->regs + offset;
db->channel.hsp = hsp;
db->name = devm_kstrdup_const(hsp->dev, name, GFP_KERNEL);
db->master = master;
db->index = index;
spin_lock_irqsave(&hsp->lock, flags);
list_add_tail(&db->list, &hsp->doorbells);
spin_unlock_irqrestore(&hsp->lock, flags);
return &db->channel;
}
static int tegra_hsp_doorbell_send_data(struct mbox_chan *chan, void *data)
{
struct tegra_hsp_doorbell *db = chan->con_priv;
tegra_hsp_channel_writel(&db->channel, 1, HSP_DB_TRIGGER);
return 0;
}
static int tegra_hsp_doorbell_startup(struct mbox_chan *chan)
{
struct tegra_hsp_doorbell *db = chan->con_priv;
struct tegra_hsp *hsp = db->channel.hsp;
struct tegra_hsp_doorbell *ccplex;
unsigned long flags;
u32 value;
if (db->master >= chan->mbox->num_chans) {
dev_err(chan->mbox->dev,
"invalid master ID %u for HSP channel\n",
db->master);
return -EINVAL;
}
ccplex = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
if (!ccplex)
return -ENODEV;
if (!tegra_hsp_doorbell_can_ring(db))
return -ENODEV;
spin_lock_irqsave(&hsp->lock, flags);
value = tegra_hsp_channel_readl(&ccplex->channel, HSP_DB_ENABLE);
value |= BIT(db->master);
tegra_hsp_channel_writel(&ccplex->channel, value, HSP_DB_ENABLE);
spin_unlock_irqrestore(&hsp->lock, flags);
return 0;
}
static void tegra_hsp_doorbell_shutdown(struct mbox_chan *chan)
{
struct tegra_hsp_doorbell *db = chan->con_priv;
struct tegra_hsp *hsp = db->channel.hsp;
struct tegra_hsp_doorbell *ccplex;
unsigned long flags;
u32 value;
ccplex = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
if (!ccplex)
return;
spin_lock_irqsave(&hsp->lock, flags);
value = tegra_hsp_channel_readl(&ccplex->channel, HSP_DB_ENABLE);
value &= ~BIT(db->master);
tegra_hsp_channel_writel(&ccplex->channel, value, HSP_DB_ENABLE);
spin_unlock_irqrestore(&hsp->lock, flags);
}
static const struct mbox_chan_ops tegra_hsp_db_ops = {
.send_data = tegra_hsp_doorbell_send_data,
.startup = tegra_hsp_doorbell_startup,
.shutdown = tegra_hsp_doorbell_shutdown,
};
static int tegra_hsp_mailbox_send_data(struct mbox_chan *chan, void *data)
{
struct tegra_hsp_mailbox *mb = chan->con_priv;
struct tegra_hsp *hsp = mb->channel.hsp;
unsigned long flags;
u32 value;
if (WARN_ON(!mb->producer))
return -EPERM;
/* copy data and mark mailbox full */
value = (u32)(unsigned long)data;
value |= HSP_SM_SHRD_MBOX_FULL;
tegra_hsp_channel_writel(&mb->channel, value, HSP_SM_SHRD_MBOX);
/* enable EMPTY interrupt for the shared mailbox */
spin_lock_irqsave(&hsp->lock, flags);
hsp->mask |= BIT(HSP_INT_EMPTY_SHIFT + mb->index);
tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
spin_unlock_irqrestore(&hsp->lock, flags);
return 0;
}
static int tegra_hsp_mailbox_flush(struct mbox_chan *chan,
unsigned long timeout)
{
struct tegra_hsp_mailbox *mb = chan->con_priv;
struct tegra_hsp_channel *ch = &mb->channel;
u32 value;
timeout = jiffies + msecs_to_jiffies(timeout);
while (time_before(jiffies, timeout)) {
value = tegra_hsp_channel_readl(ch, HSP_SM_SHRD_MBOX);
if ((value & HSP_SM_SHRD_MBOX_FULL) == 0) {
mbox_chan_txdone(chan, 0);
return 0;
}
udelay(1);
}
return -ETIME;
}
static int tegra_hsp_mailbox_startup(struct mbox_chan *chan)
{
struct tegra_hsp_mailbox *mb = chan->con_priv;
struct tegra_hsp_channel *ch = &mb->channel;
struct tegra_hsp *hsp = mb->channel.hsp;
unsigned long flags;
chan->txdone_method = TXDONE_BY_IRQ;
/*
* Shared mailboxes start out as consumers by default. FULL and EMPTY
* interrupts are coalesced at the same shared interrupt.
*
* Keep EMPTY interrupts disabled at startup and only enable them when
* the mailbox is actually full. This is required because the FULL and
* EMPTY interrupts are level-triggered, so keeping EMPTY interrupts
* enabled all the time would cause an interrupt storm while mailboxes
* are idle.
*/
spin_lock_irqsave(&hsp->lock, flags);
if (mb->producer)
hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
else
hsp->mask |= BIT(HSP_INT_FULL_SHIFT + mb->index);
tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
spin_unlock_irqrestore(&hsp->lock, flags);
if (hsp->soc->has_per_mb_ie) {
if (mb->producer)
tegra_hsp_channel_writel(ch, 0x0,
HSP_SM_SHRD_MBOX_EMPTY_INT_IE);
else
tegra_hsp_channel_writel(ch, 0x1,
HSP_SM_SHRD_MBOX_FULL_INT_IE);
}
return 0;
}
static void tegra_hsp_mailbox_shutdown(struct mbox_chan *chan)
{
struct tegra_hsp_mailbox *mb = chan->con_priv;
struct tegra_hsp_channel *ch = &mb->channel;
struct tegra_hsp *hsp = mb->channel.hsp;
unsigned long flags;
if (hsp->soc->has_per_mb_ie) {
if (mb->producer)
tegra_hsp_channel_writel(ch, 0x0,
HSP_SM_SHRD_MBOX_EMPTY_INT_IE);
else
tegra_hsp_channel_writel(ch, 0x0,
HSP_SM_SHRD_MBOX_FULL_INT_IE);
}
spin_lock_irqsave(&hsp->lock, flags);
if (mb->producer)
hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
else
hsp->mask &= ~BIT(HSP_INT_FULL_SHIFT + mb->index);
tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
spin_unlock_irqrestore(&hsp->lock, flags);
}
static const struct mbox_chan_ops tegra_hsp_sm_ops = {
.send_data = tegra_hsp_mailbox_send_data,
.flush = tegra_hsp_mailbox_flush,
.startup = tegra_hsp_mailbox_startup,
.shutdown = tegra_hsp_mailbox_shutdown,
};
static struct mbox_chan *tegra_hsp_db_xlate(struct mbox_controller *mbox,
const struct of_phandle_args *args)
{
struct tegra_hsp *hsp = container_of(mbox, struct tegra_hsp, mbox_db);
unsigned int type = args->args[0], master = args->args[1];
struct tegra_hsp_channel *channel = ERR_PTR(-ENODEV);
struct tegra_hsp_doorbell *db;
struct mbox_chan *chan;
unsigned long flags;
unsigned int i;
if (type != TEGRA_HSP_MBOX_TYPE_DB || !hsp->doorbell_irq)
return ERR_PTR(-ENODEV);
db = tegra_hsp_doorbell_get(hsp, master);
if (db)
channel = &db->channel;
if (IS_ERR(channel))
return ERR_CAST(channel);
spin_lock_irqsave(&hsp->lock, flags);
for (i = 0; i < mbox->num_chans; i++) {
chan = &mbox->chans[i];
if (!chan->con_priv) {
channel->chan = chan;
chan->con_priv = db;
break;
}
chan = NULL;
}
spin_unlock_irqrestore(&hsp->lock, flags);
return chan ?: ERR_PTR(-EBUSY);
}
static struct mbox_chan *tegra_hsp_sm_xlate(struct mbox_controller *mbox,
const struct of_phandle_args *args)
{
struct tegra_hsp *hsp = container_of(mbox, struct tegra_hsp, mbox_sm);
unsigned int type = args->args[0], index;
struct tegra_hsp_mailbox *mb;
index = args->args[1] & TEGRA_HSP_SM_MASK;
if (type != TEGRA_HSP_MBOX_TYPE_SM || !hsp->shared_irqs ||
index >= hsp->num_sm)
return ERR_PTR(-ENODEV);
mb = &hsp->mailboxes[index];
if ((args->args[1] & TEGRA_HSP_SM_FLAG_TX) == 0)
mb->producer = false;
else
mb->producer = true;
return mb->channel.chan;
}
static int tegra_hsp_add_doorbells(struct tegra_hsp *hsp)
{
const struct tegra_hsp_db_map *map = hsp->soc->map;
struct tegra_hsp_channel *channel;
while (map->name) {
channel = tegra_hsp_doorbell_create(hsp, map->name,
map->master, map->index);
if (IS_ERR(channel))
return PTR_ERR(channel);
map++;
}
return 0;
}
static int tegra_hsp_add_mailboxes(struct tegra_hsp *hsp, struct device *dev)
{
int i;
hsp->mailboxes = devm_kcalloc(dev, hsp->num_sm, sizeof(*hsp->mailboxes),
GFP_KERNEL);
if (!hsp->mailboxes)
return -ENOMEM;
for (i = 0; i < hsp->num_sm; i++) {
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
mb->index = i;
mb->channel.hsp = hsp;
mb->channel.regs = hsp->regs + SZ_64K + i * SZ_32K;
mb->channel.chan = &hsp->mbox_sm.chans[i];
mb->channel.chan->con_priv = mb;
}
return 0;
}
static int tegra_hsp_request_shared_irq(struct tegra_hsp *hsp)
{
unsigned int i, irq = 0;
int err;
for (i = 0; i < hsp->num_si; i++) {
irq = hsp->shared_irqs[i];
if (irq <= 0)
continue;
err = devm_request_irq(hsp->dev, irq, tegra_hsp_shared_irq, 0,
dev_name(hsp->dev), hsp);
if (err < 0) {
dev_err(hsp->dev, "failed to request interrupt: %d\n",
err);
continue;
}
hsp->shared_irq = i;
/* disable all interrupts */
tegra_hsp_writel(hsp, 0, HSP_INT_IE(hsp->shared_irq));
dev_dbg(hsp->dev, "interrupt requested: %u\n", irq);
break;
}
if (i == hsp->num_si) {
dev_err(hsp->dev, "failed to find available interrupt\n");
return -ENOENT;
}
return 0;
}
static int tegra_hsp_probe(struct platform_device *pdev)
{
struct tegra_hsp *hsp;
struct resource *res;
unsigned int i;
u32 value;
int err;
hsp = devm_kzalloc(&pdev->dev, sizeof(*hsp), GFP_KERNEL);
if (!hsp)
return -ENOMEM;
hsp->dev = &pdev->dev;
hsp->soc = of_device_get_match_data(&pdev->dev);
INIT_LIST_HEAD(&hsp->doorbells);
spin_lock_init(&hsp->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hsp->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hsp->regs))
return PTR_ERR(hsp->regs);
value = tegra_hsp_readl(hsp, HSP_INT_DIMENSIONING);
hsp->num_sm = (value >> HSP_nSM_SHIFT) & HSP_nINT_MASK;
hsp->num_ss = (value >> HSP_nSS_SHIFT) & HSP_nINT_MASK;
hsp->num_as = (value >> HSP_nAS_SHIFT) & HSP_nINT_MASK;
hsp->num_db = (value >> HSP_nDB_SHIFT) & HSP_nINT_MASK;
hsp->num_si = (value >> HSP_nSI_SHIFT) & HSP_nINT_MASK;
err = platform_get_irq_byname_optional(pdev, "doorbell");
if (err >= 0)
hsp->doorbell_irq = err;
if (hsp->num_si > 0) {
unsigned int count = 0;
hsp->shared_irqs = devm_kcalloc(&pdev->dev, hsp->num_si,
sizeof(*hsp->shared_irqs),
GFP_KERNEL);
if (!hsp->shared_irqs)
return -ENOMEM;
for (i = 0; i < hsp->num_si; i++) {
char *name;
name = kasprintf(GFP_KERNEL, "shared%u", i);
if (!name)
return -ENOMEM;
err = platform_get_irq_byname_optional(pdev, name);
if (err >= 0) {
hsp->shared_irqs[i] = err;
count++;
}
kfree(name);
}
if (count == 0) {
devm_kfree(&pdev->dev, hsp->shared_irqs);
hsp->shared_irqs = NULL;
}
}
/* setup the doorbell controller */
hsp->mbox_db.of_xlate = tegra_hsp_db_xlate;
hsp->mbox_db.num_chans = 32;
hsp->mbox_db.dev = &pdev->dev;
hsp->mbox_db.ops = &tegra_hsp_db_ops;
hsp->mbox_db.chans = devm_kcalloc(&pdev->dev, hsp->mbox_db.num_chans,
sizeof(*hsp->mbox_db.chans),
GFP_KERNEL);
if (!hsp->mbox_db.chans)
return -ENOMEM;
if (hsp->doorbell_irq) {
err = tegra_hsp_add_doorbells(hsp);
if (err < 0) {
dev_err(&pdev->dev, "failed to add doorbells: %d\n",
err);
return err;
}
}
err = devm_mbox_controller_register(&pdev->dev, &hsp->mbox_db);
if (err < 0) {
dev_err(&pdev->dev, "failed to register doorbell mailbox: %d\n",
err);
return err;
}
/* setup the shared mailbox controller */
hsp->mbox_sm.of_xlate = tegra_hsp_sm_xlate;
hsp->mbox_sm.num_chans = hsp->num_sm;
hsp->mbox_sm.dev = &pdev->dev;
hsp->mbox_sm.ops = &tegra_hsp_sm_ops;
hsp->mbox_sm.chans = devm_kcalloc(&pdev->dev, hsp->mbox_sm.num_chans,
sizeof(*hsp->mbox_sm.chans),
GFP_KERNEL);
if (!hsp->mbox_sm.chans)
return -ENOMEM;
if (hsp->shared_irqs) {
err = tegra_hsp_add_mailboxes(hsp, &pdev->dev);
if (err < 0) {
dev_err(&pdev->dev, "failed to add mailboxes: %d\n",
err);
return err;
}
}
err = devm_mbox_controller_register(&pdev->dev, &hsp->mbox_sm);
if (err < 0) {
dev_err(&pdev->dev, "failed to register shared mailbox: %d\n",
err);
return err;
}
platform_set_drvdata(pdev, hsp);
if (hsp->doorbell_irq) {
err = devm_request_irq(&pdev->dev, hsp->doorbell_irq,
tegra_hsp_doorbell_irq, IRQF_NO_SUSPEND,
dev_name(&pdev->dev), hsp);
if (err < 0) {
dev_err(&pdev->dev,
"failed to request doorbell IRQ#%u: %d\n",
hsp->doorbell_irq, err);
return err;
}
}
if (hsp->shared_irqs) {
err = tegra_hsp_request_shared_irq(hsp);
if (err < 0)
return err;
}
return 0;
}
static int __maybe_unused tegra_hsp_resume(struct device *dev)
{
struct tegra_hsp *hsp = dev_get_drvdata(dev);
unsigned int i;
struct tegra_hsp_doorbell *db;
list_for_each_entry(db, &hsp->doorbells, list) {
if (db && db->channel.chan)
tegra_hsp_doorbell_startup(db->channel.chan);
}
if (hsp->mailboxes) {
for (i = 0; i < hsp->num_sm; i++) {
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
if (mb->channel.chan->cl)
tegra_hsp_mailbox_startup(mb->channel.chan);
}
}
return 0;
}
static const struct dev_pm_ops tegra_hsp_pm_ops = {
.resume_noirq = tegra_hsp_resume,
};
static const struct tegra_hsp_db_map tegra186_hsp_db_map[] = {
{ "ccplex", TEGRA_HSP_DB_MASTER_CCPLEX, HSP_DB_CCPLEX, },
{ "bpmp", TEGRA_HSP_DB_MASTER_BPMP, HSP_DB_BPMP, },
{ /* sentinel */ }
};
static const struct tegra_hsp_soc tegra186_hsp_soc = {
.map = tegra186_hsp_db_map,
.has_per_mb_ie = false,
};
static const struct tegra_hsp_soc tegra194_hsp_soc = {
.map = tegra186_hsp_db_map,
.has_per_mb_ie = true,
};
static const struct of_device_id tegra_hsp_match[] = {
{ .compatible = "nvidia,tegra186-hsp", .data = &tegra186_hsp_soc },
{ .compatible = "nvidia,tegra194-hsp", .data = &tegra194_hsp_soc },
{ }
};
static struct platform_driver tegra_hsp_driver = {
.driver = {
.name = "tegra-hsp",
.of_match_table = tegra_hsp_match,
.pm = &tegra_hsp_pm_ops,
},
.probe = tegra_hsp_probe,
};
static int __init tegra_hsp_init(void)
{
return platform_driver_register(&tegra_hsp_driver);
}
core_initcall(tegra_hsp_init);