blob: 19ef56cbcfd39da11760b81b49500f57e5d4e50e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016-2023, 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/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <soc/tegra/fuse.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_SHRD_MBOX_TYPE1_TAG 0x40
#define HSP_SHRD_MBOX_TYPE1_DATA0 0x48
#define HSP_SHRD_MBOX_TYPE1_DATA1 0x4c
#define HSP_SHRD_MBOX_TYPE1_DATA2 0x50
#define HSP_SHRD_MBOX_TYPE1_DATA3 0x54
#define HSP_DB_CCPLEX 1
#define HSP_DB_BPMP 3
#define HSP_DB_MAX 7
#define HSP_MBOX_TYPE_MASK 0xff
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_sm_ops {
void (*send)(struct tegra_hsp_channel *channel, void *data);
void (*recv)(struct tegra_hsp_channel *channel);
};
struct tegra_hsp_mailbox {
struct tegra_hsp_channel channel;
const struct tegra_hsp_sm_ops *ops;
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;
bool has_128_bit_mb;
unsigned int reg_stride;
};
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 lock_class_key lock_key;
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;
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)
mb->ops->recv(&mb->channel);
}
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 * hsp->soc->reg_stride;
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;
/*
* On simulation platforms the BPMP hasn't had a chance yet to mark
* the doorbell as ringable by the CCPLEX, so we want to skip extra
* checks here.
*/
if (tegra_is_silicon() && !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 void tegra_hsp_sm_send32(struct tegra_hsp_channel *channel, void *data)
{
u32 value;
/* copy data and mark mailbox full */
value = (u32)(unsigned long)data;
value |= HSP_SM_SHRD_MBOX_FULL;
tegra_hsp_channel_writel(channel, value, HSP_SM_SHRD_MBOX);
}
static void tegra_hsp_sm_recv32(struct tegra_hsp_channel *channel)
{
u32 value;
void *msg;
value = tegra_hsp_channel_readl(channel, HSP_SM_SHRD_MBOX);
value &= ~HSP_SM_SHRD_MBOX_FULL;
msg = (void *)(unsigned long)value;
mbox_chan_received_data(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(channel, 0x0, HSP_SM_SHRD_MBOX);
}
static const struct tegra_hsp_sm_ops tegra_hsp_sm_32bit_ops = {
.send = tegra_hsp_sm_send32,
.recv = tegra_hsp_sm_recv32,
};
static void tegra_hsp_sm_send128(struct tegra_hsp_channel *channel, void *data)
{
u32 value[4];
memcpy(value, data, sizeof(value));
/* Copy data */
tegra_hsp_channel_writel(channel, value[0], HSP_SHRD_MBOX_TYPE1_DATA0);
tegra_hsp_channel_writel(channel, value[1], HSP_SHRD_MBOX_TYPE1_DATA1);
tegra_hsp_channel_writel(channel, value[2], HSP_SHRD_MBOX_TYPE1_DATA2);
tegra_hsp_channel_writel(channel, value[3], HSP_SHRD_MBOX_TYPE1_DATA3);
/* Update tag to mark mailbox full */
tegra_hsp_channel_writel(channel, HSP_SM_SHRD_MBOX_FULL,
HSP_SHRD_MBOX_TYPE1_TAG);
}
static void tegra_hsp_sm_recv128(struct tegra_hsp_channel *channel)
{
u32 value[4];
void *msg;
value[0] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA0);
value[1] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA1);
value[2] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA2);
value[3] = tegra_hsp_channel_readl(channel, HSP_SHRD_MBOX_TYPE1_DATA3);
msg = (void *)(unsigned long)value;
mbox_chan_received_data(channel->chan, msg);
/*
* Clear data registers and tag.
*/
tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA0);
tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA1);
tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA2);
tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_DATA3);
tegra_hsp_channel_writel(channel, 0x0, HSP_SHRD_MBOX_TYPE1_TAG);
}
static const struct tegra_hsp_sm_ops tegra_hsp_sm_128bit_ops = {
.send = tegra_hsp_sm_send128,
.recv = tegra_hsp_sm_recv128,
};
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;
if (WARN_ON(!mb->producer))
return -EPERM;
mb->ops->send(&mb->channel, data);
/* 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);
/* Wait until channel is empty */
if (chan->active_req != NULL)
continue;
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 & HSP_MBOX_TYPE_MASK) != TEGRA_HSP_MBOX_TYPE_SM ||
!hsp->shared_irqs || index >= hsp->num_sm)
return ERR_PTR(-ENODEV);
mb = &hsp->mailboxes[index];
if (type & TEGRA_HSP_MBOX_TYPE_SM_128BIT) {
if (!hsp->soc->has_128_bit_mb)
return ERR_PTR(-ENODEV);
mb->ops = &tegra_hsp_sm_128bit_ops;
} else {
mb->ops = &tegra_hsp_sm_32bit_ops;
}
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;
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);
hsp->regs = devm_platform_ioremap_resource(pdev, 0);
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;
}
lockdep_register_key(&hsp->lock_key);
lockdep_set_class(&hsp->lock, &hsp->lock_key);
return 0;
}
static void tegra_hsp_remove(struct platform_device *pdev)
{
struct tegra_hsp *hsp = platform_get_drvdata(pdev);
lockdep_unregister_key(&hsp->lock_key);
}
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->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,
.has_128_bit_mb = false,
.reg_stride = 0x100,
};
static const struct tegra_hsp_soc tegra194_hsp_soc = {
.map = tegra186_hsp_db_map,
.has_per_mb_ie = true,
.has_128_bit_mb = false,
.reg_stride = 0x100,
};
static const struct tegra_hsp_soc tegra234_hsp_soc = {
.map = tegra186_hsp_db_map,
.has_per_mb_ie = false,
.has_128_bit_mb = true,
.reg_stride = 0x100,
};
static const struct tegra_hsp_soc tegra264_hsp_soc = {
.map = tegra186_hsp_db_map,
.has_per_mb_ie = false,
.has_128_bit_mb = true,
.reg_stride = 0x1000,
};
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 },
{ .compatible = "nvidia,tegra234-hsp", .data = &tegra234_hsp_soc },
{ .compatible = "nvidia,tegra264-hsp", .data = &tegra264_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,
.remove_new = tegra_hsp_remove,
};
static int __init tegra_hsp_init(void)
{
return platform_driver_register(&tegra_hsp_driver);
}
core_initcall(tegra_hsp_init);