![Gustavo A. R. Silva](/assets/img/avatar_default.png)
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
1399 lines
37 KiB
C
1399 lines
37 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* OMAP Remote Processor driver
|
|
*
|
|
* Copyright (C) 2011-2020 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Copyright (C) 2011 Google, Inc.
|
|
*
|
|
* Ohad Ben-Cohen <ohad@wizery.com>
|
|
* Brian Swetland <swetland@google.com>
|
|
* Fernando Guzman Lugo <fernando.lugo@ti.com>
|
|
* Mark Grosen <mgrosen@ti.com>
|
|
* Suman Anna <s-anna@ti.com>
|
|
* Hari Kanigeri <h-kanigeri2@ti.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/clk/ti.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_reserved_mem.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/remoteproc.h>
|
|
#include <linux/mailbox_client.h>
|
|
#include <linux/omap-iommu.h>
|
|
#include <linux/omap-mailbox.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/reset.h>
|
|
#include <clocksource/timer-ti-dm.h>
|
|
|
|
#include <linux/platform_data/dmtimer-omap.h>
|
|
|
|
#include "omap_remoteproc.h"
|
|
#include "remoteproc_internal.h"
|
|
|
|
/* default auto-suspend delay (ms) */
|
|
#define DEFAULT_AUTOSUSPEND_DELAY 10000
|
|
|
|
/**
|
|
* struct omap_rproc_boot_data - boot data structure for the DSP omap rprocs
|
|
* @syscon: regmap handle for the system control configuration module
|
|
* @boot_reg: boot register offset within the @syscon regmap
|
|
* @boot_reg_shift: bit-field shift required for the boot address value in
|
|
* @boot_reg
|
|
*/
|
|
struct omap_rproc_boot_data {
|
|
struct regmap *syscon;
|
|
unsigned int boot_reg;
|
|
unsigned int boot_reg_shift;
|
|
};
|
|
|
|
/**
|
|
* struct omap_rproc_mem - internal memory structure
|
|
* @cpu_addr: MPU virtual address of the memory region
|
|
* @bus_addr: bus address used to access the memory region
|
|
* @dev_addr: device address of the memory region from DSP view
|
|
* @size: size of the memory region
|
|
*/
|
|
struct omap_rproc_mem {
|
|
void __iomem *cpu_addr;
|
|
phys_addr_t bus_addr;
|
|
u32 dev_addr;
|
|
size_t size;
|
|
};
|
|
|
|
/**
|
|
* struct omap_rproc_timer - data structure for a timer used by a omap rproc
|
|
* @odt: timer pointer
|
|
* @timer_ops: OMAP dmtimer ops for @odt timer
|
|
* @irq: timer irq
|
|
*/
|
|
struct omap_rproc_timer {
|
|
struct omap_dm_timer *odt;
|
|
const struct omap_dm_timer_ops *timer_ops;
|
|
int irq;
|
|
};
|
|
|
|
/**
|
|
* struct omap_rproc - omap remote processor state
|
|
* @mbox: mailbox channel handle
|
|
* @client: mailbox client to request the mailbox channel
|
|
* @boot_data: boot data structure for setting processor boot address
|
|
* @mem: internal memory regions data
|
|
* @num_mems: number of internal memory regions
|
|
* @num_timers: number of rproc timer(s)
|
|
* @num_wd_timers: number of rproc watchdog timers
|
|
* @timers: timer(s) info used by rproc
|
|
* @autosuspend_delay: auto-suspend delay value to be used for runtime pm
|
|
* @need_resume: if true a resume is needed in the system resume callback
|
|
* @rproc: rproc handle
|
|
* @reset: reset handle
|
|
* @pm_comp: completion primitive to sync for suspend response
|
|
* @fck: functional clock for the remoteproc
|
|
* @suspend_acked: state machine flag to store the suspend request ack
|
|
*/
|
|
struct omap_rproc {
|
|
struct mbox_chan *mbox;
|
|
struct mbox_client client;
|
|
struct omap_rproc_boot_data *boot_data;
|
|
struct omap_rproc_mem *mem;
|
|
int num_mems;
|
|
int num_timers;
|
|
int num_wd_timers;
|
|
struct omap_rproc_timer *timers;
|
|
int autosuspend_delay;
|
|
bool need_resume;
|
|
struct rproc *rproc;
|
|
struct reset_control *reset;
|
|
struct completion pm_comp;
|
|
struct clk *fck;
|
|
bool suspend_acked;
|
|
};
|
|
|
|
/**
|
|
* struct omap_rproc_mem_data - memory definitions for an omap remote processor
|
|
* @name: name for this memory entry
|
|
* @dev_addr: device address for the memory entry
|
|
*/
|
|
struct omap_rproc_mem_data {
|
|
const char *name;
|
|
const u32 dev_addr;
|
|
};
|
|
|
|
/**
|
|
* struct omap_rproc_dev_data - device data for the omap remote processor
|
|
* @device_name: device name of the remote processor
|
|
* @mems: memory definitions for this remote processor
|
|
*/
|
|
struct omap_rproc_dev_data {
|
|
const char *device_name;
|
|
const struct omap_rproc_mem_data *mems;
|
|
};
|
|
|
|
/**
|
|
* omap_rproc_request_timer() - request a timer for a remoteproc
|
|
* @dev: device requesting the timer
|
|
* @np: device node pointer to the desired timer
|
|
* @timer: handle to a struct omap_rproc_timer to return the timer handle
|
|
*
|
|
* This helper function is used primarily to request a timer associated with
|
|
* a remoteproc. The returned handle is stored in the .odt field of the
|
|
* @timer structure passed in, and is used to invoke other timer specific
|
|
* ops (like starting a timer either during device initialization or during
|
|
* a resume operation, or for stopping/freeing a timer).
|
|
*
|
|
* Return: 0 on success, otherwise an appropriate failure
|
|
*/
|
|
static int omap_rproc_request_timer(struct device *dev, struct device_node *np,
|
|
struct omap_rproc_timer *timer)
|
|
{
|
|
int ret;
|
|
|
|
timer->odt = timer->timer_ops->request_by_node(np);
|
|
if (!timer->odt) {
|
|
dev_err(dev, "request for timer node %p failed\n", np);
|
|
return -EBUSY;
|
|
}
|
|
|
|
ret = timer->timer_ops->set_source(timer->odt, OMAP_TIMER_SRC_SYS_CLK);
|
|
if (ret) {
|
|
dev_err(dev, "error setting OMAP_TIMER_SRC_SYS_CLK as source for timer node %p\n",
|
|
np);
|
|
timer->timer_ops->free(timer->odt);
|
|
return ret;
|
|
}
|
|
|
|
/* clean counter, remoteproc code will set the value */
|
|
timer->timer_ops->set_load(timer->odt, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_start_timer() - start a timer for a remoteproc
|
|
* @timer: handle to a OMAP rproc timer
|
|
*
|
|
* This helper function is used to start a timer associated with a remoteproc,
|
|
* obtained using the request_timer ops. The helper function needs to be
|
|
* invoked by the driver to start the timer (during device initialization)
|
|
* or to just resume the timer.
|
|
*
|
|
* Return: 0 on success, otherwise a failure as returned by DMTimer ops
|
|
*/
|
|
static inline int omap_rproc_start_timer(struct omap_rproc_timer *timer)
|
|
{
|
|
return timer->timer_ops->start(timer->odt);
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_stop_timer() - stop a timer for a remoteproc
|
|
* @timer: handle to a OMAP rproc timer
|
|
*
|
|
* This helper function is used to disable a timer associated with a
|
|
* remoteproc, and needs to be called either during a device shutdown
|
|
* or suspend operation. The separate helper function allows the driver
|
|
* to just stop a timer without having to release the timer during a
|
|
* suspend operation.
|
|
*
|
|
* Return: 0 on success, otherwise a failure as returned by DMTimer ops
|
|
*/
|
|
static inline int omap_rproc_stop_timer(struct omap_rproc_timer *timer)
|
|
{
|
|
return timer->timer_ops->stop(timer->odt);
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_release_timer() - release a timer for a remoteproc
|
|
* @timer: handle to a OMAP rproc timer
|
|
*
|
|
* This helper function is used primarily to release a timer associated
|
|
* with a remoteproc. The dmtimer will be available for other clients to
|
|
* use once released.
|
|
*
|
|
* Return: 0 on success, otherwise a failure as returned by DMTimer ops
|
|
*/
|
|
static inline int omap_rproc_release_timer(struct omap_rproc_timer *timer)
|
|
{
|
|
return timer->timer_ops->free(timer->odt);
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_get_timer_irq() - get the irq for a timer
|
|
* @timer: handle to a OMAP rproc timer
|
|
*
|
|
* This function is used to get the irq associated with a watchdog timer. The
|
|
* function is called by the OMAP remoteproc driver to register a interrupt
|
|
* handler to handle watchdog events on the remote processor.
|
|
*
|
|
* Return: irq id on success, otherwise a failure as returned by DMTimer ops
|
|
*/
|
|
static inline int omap_rproc_get_timer_irq(struct omap_rproc_timer *timer)
|
|
{
|
|
return timer->timer_ops->get_irq(timer->odt);
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_ack_timer_irq() - acknowledge a timer irq
|
|
* @timer: handle to a OMAP rproc timer
|
|
*
|
|
* This function is used to clear the irq associated with a watchdog timer. The
|
|
* The function is called by the OMAP remoteproc upon a watchdog event on the
|
|
* remote processor to clear the interrupt status of the watchdog timer.
|
|
*/
|
|
static inline void omap_rproc_ack_timer_irq(struct omap_rproc_timer *timer)
|
|
{
|
|
timer->timer_ops->write_status(timer->odt, OMAP_TIMER_INT_OVERFLOW);
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_watchdog_isr() - Watchdog ISR handler for remoteproc device
|
|
* @irq: IRQ number associated with a watchdog timer
|
|
* @data: IRQ handler data
|
|
*
|
|
* This ISR routine executes the required necessary low-level code to
|
|
* acknowledge a watchdog timer interrupt. There can be multiple watchdog
|
|
* timers associated with a rproc (like IPUs which have 2 watchdog timers,
|
|
* one per Cortex M3/M4 core), so a lookup has to be performed to identify
|
|
* the timer to acknowledge its interrupt.
|
|
*
|
|
* The function also invokes rproc_report_crash to report the watchdog event
|
|
* to the remoteproc driver core, to trigger a recovery.
|
|
*
|
|
* Return: IRQ_HANDLED on success, otherwise IRQ_NONE
|
|
*/
|
|
static irqreturn_t omap_rproc_watchdog_isr(int irq, void *data)
|
|
{
|
|
struct rproc *rproc = data;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct device *dev = rproc->dev.parent;
|
|
struct omap_rproc_timer *timers = oproc->timers;
|
|
struct omap_rproc_timer *wd_timer = NULL;
|
|
int num_timers = oproc->num_timers + oproc->num_wd_timers;
|
|
int i;
|
|
|
|
for (i = oproc->num_timers; i < num_timers; i++) {
|
|
if (timers[i].irq > 0 && irq == timers[i].irq) {
|
|
wd_timer = &timers[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!wd_timer) {
|
|
dev_err(dev, "invalid timer\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
omap_rproc_ack_timer_irq(wd_timer);
|
|
|
|
rproc_report_crash(rproc, RPROC_WATCHDOG);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_enable_timers() - enable the timers for a remoteproc
|
|
* @rproc: handle of a remote processor
|
|
* @configure: boolean flag used to acquire and configure the timer handle
|
|
*
|
|
* This function is used primarily to enable the timers associated with
|
|
* a remoteproc. The configure flag is provided to allow the driver to
|
|
* to either acquire and start a timer (during device initialization) or
|
|
* to just start a timer (during a resume operation).
|
|
*
|
|
* Return: 0 on success, otherwise an appropriate failure
|
|
*/
|
|
static int omap_rproc_enable_timers(struct rproc *rproc, bool configure)
|
|
{
|
|
int i;
|
|
int ret = 0;
|
|
struct platform_device *tpdev;
|
|
struct dmtimer_platform_data *tpdata;
|
|
const struct omap_dm_timer_ops *timer_ops;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct omap_rproc_timer *timers = oproc->timers;
|
|
struct device *dev = rproc->dev.parent;
|
|
struct device_node *np = NULL;
|
|
int num_timers = oproc->num_timers + oproc->num_wd_timers;
|
|
|
|
if (!num_timers)
|
|
return 0;
|
|
|
|
if (!configure)
|
|
goto start_timers;
|
|
|
|
for (i = 0; i < num_timers; i++) {
|
|
if (i < oproc->num_timers)
|
|
np = of_parse_phandle(dev->of_node, "ti,timers", i);
|
|
else
|
|
np = of_parse_phandle(dev->of_node,
|
|
"ti,watchdog-timers",
|
|
(i - oproc->num_timers));
|
|
if (!np) {
|
|
ret = -ENXIO;
|
|
dev_err(dev, "device node lookup for timer at index %d failed: %d\n",
|
|
i < oproc->num_timers ? i :
|
|
i - oproc->num_timers, ret);
|
|
goto free_timers;
|
|
}
|
|
|
|
tpdev = of_find_device_by_node(np);
|
|
if (!tpdev) {
|
|
ret = -ENODEV;
|
|
dev_err(dev, "could not get timer platform device\n");
|
|
goto put_node;
|
|
}
|
|
|
|
tpdata = dev_get_platdata(&tpdev->dev);
|
|
put_device(&tpdev->dev);
|
|
if (!tpdata) {
|
|
ret = -EINVAL;
|
|
dev_err(dev, "dmtimer pdata structure NULL\n");
|
|
goto put_node;
|
|
}
|
|
|
|
timer_ops = tpdata->timer_ops;
|
|
if (!timer_ops || !timer_ops->request_by_node ||
|
|
!timer_ops->set_source || !timer_ops->set_load ||
|
|
!timer_ops->free || !timer_ops->start ||
|
|
!timer_ops->stop || !timer_ops->get_irq ||
|
|
!timer_ops->write_status) {
|
|
ret = -EINVAL;
|
|
dev_err(dev, "device does not have required timer ops\n");
|
|
goto put_node;
|
|
}
|
|
|
|
timers[i].irq = -1;
|
|
timers[i].timer_ops = timer_ops;
|
|
ret = omap_rproc_request_timer(dev, np, &timers[i]);
|
|
if (ret) {
|
|
dev_err(dev, "request for timer %p failed: %d\n", np,
|
|
ret);
|
|
goto put_node;
|
|
}
|
|
of_node_put(np);
|
|
|
|
if (i >= oproc->num_timers) {
|
|
timers[i].irq = omap_rproc_get_timer_irq(&timers[i]);
|
|
if (timers[i].irq < 0) {
|
|
dev_err(dev, "get_irq for timer %p failed: %d\n",
|
|
np, timers[i].irq);
|
|
ret = -EBUSY;
|
|
goto free_timers;
|
|
}
|
|
|
|
ret = request_irq(timers[i].irq,
|
|
omap_rproc_watchdog_isr, IRQF_SHARED,
|
|
"rproc-wdt", rproc);
|
|
if (ret) {
|
|
dev_err(dev, "error requesting irq for timer %p\n",
|
|
np);
|
|
omap_rproc_release_timer(&timers[i]);
|
|
timers[i].odt = NULL;
|
|
timers[i].timer_ops = NULL;
|
|
timers[i].irq = -1;
|
|
goto free_timers;
|
|
}
|
|
}
|
|
}
|
|
|
|
start_timers:
|
|
for (i = 0; i < num_timers; i++) {
|
|
ret = omap_rproc_start_timer(&timers[i]);
|
|
if (ret) {
|
|
dev_err(dev, "start timer %p failed failed: %d\n", np,
|
|
ret);
|
|
break;
|
|
}
|
|
}
|
|
if (ret) {
|
|
while (i >= 0) {
|
|
omap_rproc_stop_timer(&timers[i]);
|
|
i--;
|
|
}
|
|
goto put_node;
|
|
}
|
|
return 0;
|
|
|
|
put_node:
|
|
if (configure)
|
|
of_node_put(np);
|
|
free_timers:
|
|
while (i--) {
|
|
if (i >= oproc->num_timers)
|
|
free_irq(timers[i].irq, rproc);
|
|
omap_rproc_release_timer(&timers[i]);
|
|
timers[i].odt = NULL;
|
|
timers[i].timer_ops = NULL;
|
|
timers[i].irq = -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_disable_timers() - disable the timers for a remoteproc
|
|
* @rproc: handle of a remote processor
|
|
* @configure: boolean flag used to release the timer handle
|
|
*
|
|
* This function is used primarily to disable the timers associated with
|
|
* a remoteproc. The configure flag is provided to allow the driver to
|
|
* to either stop and release a timer (during device shutdown) or to just
|
|
* stop a timer (during a suspend operation).
|
|
*
|
|
* Return: 0 on success or no timers
|
|
*/
|
|
static int omap_rproc_disable_timers(struct rproc *rproc, bool configure)
|
|
{
|
|
int i;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct omap_rproc_timer *timers = oproc->timers;
|
|
int num_timers = oproc->num_timers + oproc->num_wd_timers;
|
|
|
|
if (!num_timers)
|
|
return 0;
|
|
|
|
for (i = 0; i < num_timers; i++) {
|
|
omap_rproc_stop_timer(&timers[i]);
|
|
if (configure) {
|
|
if (i >= oproc->num_timers)
|
|
free_irq(timers[i].irq, rproc);
|
|
omap_rproc_release_timer(&timers[i]);
|
|
timers[i].odt = NULL;
|
|
timers[i].timer_ops = NULL;
|
|
timers[i].irq = -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_mbox_callback() - inbound mailbox message handler
|
|
* @client: mailbox client pointer used for requesting the mailbox channel
|
|
* @data: mailbox payload
|
|
*
|
|
* This handler is invoked by omap's mailbox driver whenever a mailbox
|
|
* message is received. Usually, the mailbox payload simply contains
|
|
* the index of the virtqueue that is kicked by the remote processor,
|
|
* and we let remoteproc core handle it.
|
|
*
|
|
* In addition to virtqueue indices, we also have some out-of-band values
|
|
* that indicates different events. Those values are deliberately very
|
|
* big so they don't coincide with virtqueue indices.
|
|
*/
|
|
static void omap_rproc_mbox_callback(struct mbox_client *client, void *data)
|
|
{
|
|
struct omap_rproc *oproc = container_of(client, struct omap_rproc,
|
|
client);
|
|
struct device *dev = oproc->rproc->dev.parent;
|
|
const char *name = oproc->rproc->name;
|
|
u32 msg = (u32)data;
|
|
|
|
dev_dbg(dev, "mbox msg: 0x%x\n", msg);
|
|
|
|
switch (msg) {
|
|
case RP_MBOX_CRASH:
|
|
/*
|
|
* remoteproc detected an exception, notify the rproc core.
|
|
* The remoteproc core will handle the recovery.
|
|
*/
|
|
dev_err(dev, "omap rproc %s crashed\n", name);
|
|
rproc_report_crash(oproc->rproc, RPROC_FATAL_ERROR);
|
|
break;
|
|
case RP_MBOX_ECHO_REPLY:
|
|
dev_info(dev, "received echo reply from %s\n", name);
|
|
break;
|
|
case RP_MBOX_SUSPEND_ACK:
|
|
case RP_MBOX_SUSPEND_CANCEL:
|
|
oproc->suspend_acked = msg == RP_MBOX_SUSPEND_ACK;
|
|
complete(&oproc->pm_comp);
|
|
break;
|
|
default:
|
|
if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
|
|
return;
|
|
if (msg > oproc->rproc->max_notifyid) {
|
|
dev_dbg(dev, "dropping unknown message 0x%x", msg);
|
|
return;
|
|
}
|
|
/* msg contains the index of the triggered vring */
|
|
if (rproc_vq_interrupt(oproc->rproc, msg) == IRQ_NONE)
|
|
dev_dbg(dev, "no message was found in vqid %d\n", msg);
|
|
}
|
|
}
|
|
|
|
/* kick a virtqueue */
|
|
static void omap_rproc_kick(struct rproc *rproc, int vqid)
|
|
{
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct device *dev = rproc->dev.parent;
|
|
int ret;
|
|
|
|
/* wake up the rproc before kicking it */
|
|
ret = pm_runtime_get_sync(dev);
|
|
if (WARN_ON(ret < 0)) {
|
|
dev_err(dev, "pm_runtime_get_sync() failed during kick, ret = %d\n",
|
|
ret);
|
|
pm_runtime_put_noidle(dev);
|
|
return;
|
|
}
|
|
|
|
/* send the index of the triggered virtqueue in the mailbox payload */
|
|
ret = mbox_send_message(oproc->mbox, (void *)vqid);
|
|
if (ret < 0)
|
|
dev_err(dev, "failed to send mailbox message, status = %d\n",
|
|
ret);
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_write_dsp_boot_addr() - set boot address for DSP remote processor
|
|
* @rproc: handle of a remote processor
|
|
*
|
|
* Set boot address for a supported DSP remote processor.
|
|
*
|
|
* Return: 0 on success, or -EINVAL if boot address is not aligned properly
|
|
*/
|
|
static int omap_rproc_write_dsp_boot_addr(struct rproc *rproc)
|
|
{
|
|
struct device *dev = rproc->dev.parent;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct omap_rproc_boot_data *bdata = oproc->boot_data;
|
|
u32 offset = bdata->boot_reg;
|
|
u32 value;
|
|
u32 mask;
|
|
|
|
if (rproc->bootaddr & (SZ_1K - 1)) {
|
|
dev_err(dev, "invalid boot address 0x%llx, must be aligned on a 1KB boundary\n",
|
|
rproc->bootaddr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
value = rproc->bootaddr >> bdata->boot_reg_shift;
|
|
mask = ~(SZ_1K - 1) >> bdata->boot_reg_shift;
|
|
|
|
return regmap_update_bits(bdata->syscon, offset, mask, value);
|
|
}
|
|
|
|
/*
|
|
* Power up the remote processor.
|
|
*
|
|
* This function will be invoked only after the firmware for this rproc
|
|
* was loaded, parsed successfully, and all of its resource requirements
|
|
* were met.
|
|
*/
|
|
static int omap_rproc_start(struct rproc *rproc)
|
|
{
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct device *dev = rproc->dev.parent;
|
|
int ret;
|
|
struct mbox_client *client = &oproc->client;
|
|
|
|
if (oproc->boot_data) {
|
|
ret = omap_rproc_write_dsp_boot_addr(rproc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
client->dev = dev;
|
|
client->tx_done = NULL;
|
|
client->rx_callback = omap_rproc_mbox_callback;
|
|
client->tx_block = false;
|
|
client->knows_txdone = false;
|
|
|
|
oproc->mbox = mbox_request_channel(client, 0);
|
|
if (IS_ERR(oproc->mbox)) {
|
|
ret = -EBUSY;
|
|
dev_err(dev, "mbox_request_channel failed: %ld\n",
|
|
PTR_ERR(oproc->mbox));
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Ping the remote processor. this is only for sanity-sake;
|
|
* there is no functional effect whatsoever.
|
|
*
|
|
* Note that the reply will _not_ arrive immediately: this message
|
|
* will wait in the mailbox fifo until the remote processor is booted.
|
|
*/
|
|
ret = mbox_send_message(oproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
|
|
if (ret < 0) {
|
|
dev_err(dev, "mbox_send_message failed: %d\n", ret);
|
|
goto put_mbox;
|
|
}
|
|
|
|
ret = omap_rproc_enable_timers(rproc, true);
|
|
if (ret) {
|
|
dev_err(dev, "omap_rproc_enable_timers failed: %d\n", ret);
|
|
goto put_mbox;
|
|
}
|
|
|
|
ret = reset_control_deassert(oproc->reset);
|
|
if (ret) {
|
|
dev_err(dev, "reset control deassert failed: %d\n", ret);
|
|
goto disable_timers;
|
|
}
|
|
|
|
/*
|
|
* remote processor is up, so update the runtime pm status and
|
|
* enable the auto-suspend. The device usage count is incremented
|
|
* manually for balancing it for auto-suspend
|
|
*/
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_use_autosuspend(dev);
|
|
pm_runtime_get_noresume(dev);
|
|
pm_runtime_enable(dev);
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
|
|
return 0;
|
|
|
|
disable_timers:
|
|
omap_rproc_disable_timers(rproc, true);
|
|
put_mbox:
|
|
mbox_free_channel(oproc->mbox);
|
|
return ret;
|
|
}
|
|
|
|
/* power off the remote processor */
|
|
static int omap_rproc_stop(struct rproc *rproc)
|
|
{
|
|
struct device *dev = rproc->dev.parent;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
int ret;
|
|
|
|
/*
|
|
* cancel any possible scheduled runtime suspend by incrementing
|
|
* the device usage count, and resuming the device. The remoteproc
|
|
* also needs to be woken up if suspended, to avoid the remoteproc
|
|
* OS to continue to remember any context that it has saved, and
|
|
* avoid potential issues in misindentifying a subsequent device
|
|
* reboot as a power restore boot
|
|
*/
|
|
ret = pm_runtime_get_sync(dev);
|
|
if (ret < 0) {
|
|
pm_runtime_put_noidle(dev);
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_control_assert(oproc->reset);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = omap_rproc_disable_timers(rproc, true);
|
|
if (ret)
|
|
goto enable_device;
|
|
|
|
mbox_free_channel(oproc->mbox);
|
|
|
|
/*
|
|
* update the runtime pm states and status now that the remoteproc
|
|
* has stopped
|
|
*/
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_dont_use_autosuspend(dev);
|
|
pm_runtime_put_noidle(dev);
|
|
pm_runtime_set_suspended(dev);
|
|
|
|
return 0;
|
|
|
|
enable_device:
|
|
reset_control_deassert(oproc->reset);
|
|
out:
|
|
/* schedule the next auto-suspend */
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* omap_rproc_da_to_va() - internal memory translation helper
|
|
* @rproc: remote processor to apply the address translation for
|
|
* @da: device address to translate
|
|
* @len: length of the memory buffer
|
|
*
|
|
* Custom function implementing the rproc .da_to_va ops to provide address
|
|
* translation (device address to kernel virtual address) for internal RAMs
|
|
* present in a DSP or IPU device). The translated addresses can be used
|
|
* either by the remoteproc core for loading, or by any rpmsg bus drivers.
|
|
*
|
|
* Return: translated virtual address in kernel memory space on success,
|
|
* or NULL on failure.
|
|
*/
|
|
static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
|
|
{
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
int i;
|
|
u32 offset;
|
|
|
|
if (len <= 0)
|
|
return NULL;
|
|
|
|
if (!oproc->num_mems)
|
|
return NULL;
|
|
|
|
for (i = 0; i < oproc->num_mems; i++) {
|
|
if (da >= oproc->mem[i].dev_addr && da + len <=
|
|
oproc->mem[i].dev_addr + oproc->mem[i].size) {
|
|
offset = da - oproc->mem[i].dev_addr;
|
|
/* __force to make sparse happy with type conversion */
|
|
return (__force void *)(oproc->mem[i].cpu_addr +
|
|
offset);
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const struct rproc_ops omap_rproc_ops = {
|
|
.start = omap_rproc_start,
|
|
.stop = omap_rproc_stop,
|
|
.kick = omap_rproc_kick,
|
|
.da_to_va = omap_rproc_da_to_va,
|
|
};
|
|
|
|
#ifdef CONFIG_PM
|
|
static bool _is_rproc_in_standby(struct omap_rproc *oproc)
|
|
{
|
|
return ti_clk_is_in_standby(oproc->fck);
|
|
}
|
|
|
|
/* 1 sec is long enough time to let the remoteproc side suspend the device */
|
|
#define DEF_SUSPEND_TIMEOUT 1000
|
|
static int _omap_rproc_suspend(struct rproc *rproc, bool auto_suspend)
|
|
{
|
|
struct device *dev = rproc->dev.parent;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
unsigned long to = msecs_to_jiffies(DEF_SUSPEND_TIMEOUT);
|
|
unsigned long ta = jiffies + to;
|
|
u32 suspend_msg = auto_suspend ?
|
|
RP_MBOX_SUSPEND_AUTO : RP_MBOX_SUSPEND_SYSTEM;
|
|
int ret;
|
|
|
|
reinit_completion(&oproc->pm_comp);
|
|
oproc->suspend_acked = false;
|
|
ret = mbox_send_message(oproc->mbox, (void *)suspend_msg);
|
|
if (ret < 0) {
|
|
dev_err(dev, "PM mbox_send_message failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = wait_for_completion_timeout(&oproc->pm_comp, to);
|
|
if (!oproc->suspend_acked)
|
|
return -EBUSY;
|
|
|
|
/*
|
|
* The remoteproc side is returning the ACK message before saving the
|
|
* context, because the context saving is performed within a SYS/BIOS
|
|
* function, and it cannot have any inter-dependencies against the IPC
|
|
* layer. Also, as the SYS/BIOS needs to preserve properly the processor
|
|
* register set, sending this ACK or signalling the completion of the
|
|
* context save through a shared memory variable can never be the
|
|
* absolute last thing to be executed on the remoteproc side, and the
|
|
* MPU cannot use the ACK message as a sync point to put the remoteproc
|
|
* into reset. The only way to ensure that the remote processor has
|
|
* completed saving the context is to check that the module has reached
|
|
* STANDBY state (after saving the context, the SYS/BIOS executes the
|
|
* appropriate target-specific WFI instruction causing the module to
|
|
* enter STANDBY).
|
|
*/
|
|
while (!_is_rproc_in_standby(oproc)) {
|
|
if (time_after(jiffies, ta))
|
|
return -ETIME;
|
|
schedule();
|
|
}
|
|
|
|
ret = reset_control_assert(oproc->reset);
|
|
if (ret) {
|
|
dev_err(dev, "reset assert during suspend failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = omap_rproc_disable_timers(rproc, false);
|
|
if (ret) {
|
|
dev_err(dev, "disabling timers during suspend failed %d\n",
|
|
ret);
|
|
goto enable_device;
|
|
}
|
|
|
|
/*
|
|
* IOMMUs would have to be disabled specifically for runtime suspend.
|
|
* They are handled automatically through System PM callbacks for
|
|
* regular system suspend
|
|
*/
|
|
if (auto_suspend) {
|
|
ret = omap_iommu_domain_deactivate(rproc->domain);
|
|
if (ret) {
|
|
dev_err(dev, "iommu domain deactivate failed %d\n",
|
|
ret);
|
|
goto enable_timers;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
enable_timers:
|
|
/* ignore errors on re-enabling code */
|
|
omap_rproc_enable_timers(rproc, false);
|
|
enable_device:
|
|
reset_control_deassert(oproc->reset);
|
|
return ret;
|
|
}
|
|
|
|
static int _omap_rproc_resume(struct rproc *rproc, bool auto_suspend)
|
|
{
|
|
struct device *dev = rproc->dev.parent;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
int ret;
|
|
|
|
/*
|
|
* IOMMUs would have to be enabled specifically for runtime resume.
|
|
* They would have been already enabled automatically through System
|
|
* PM callbacks for regular system resume
|
|
*/
|
|
if (auto_suspend) {
|
|
ret = omap_iommu_domain_activate(rproc->domain);
|
|
if (ret) {
|
|
dev_err(dev, "omap_iommu activate failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* boot address could be lost after suspend, so restore it */
|
|
if (oproc->boot_data) {
|
|
ret = omap_rproc_write_dsp_boot_addr(rproc);
|
|
if (ret) {
|
|
dev_err(dev, "boot address restore failed %d\n", ret);
|
|
goto suspend_iommu;
|
|
}
|
|
}
|
|
|
|
ret = omap_rproc_enable_timers(rproc, false);
|
|
if (ret) {
|
|
dev_err(dev, "enabling timers during resume failed %d\n", ret);
|
|
goto suspend_iommu;
|
|
}
|
|
|
|
ret = reset_control_deassert(oproc->reset);
|
|
if (ret) {
|
|
dev_err(dev, "reset deassert during resume failed %d\n", ret);
|
|
goto disable_timers;
|
|
}
|
|
|
|
return 0;
|
|
|
|
disable_timers:
|
|
omap_rproc_disable_timers(rproc, false);
|
|
suspend_iommu:
|
|
if (auto_suspend)
|
|
omap_iommu_domain_deactivate(rproc->domain);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int __maybe_unused omap_rproc_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct rproc *rproc = platform_get_drvdata(pdev);
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&rproc->lock);
|
|
if (rproc->state == RPROC_OFFLINE)
|
|
goto out;
|
|
|
|
if (rproc->state == RPROC_SUSPENDED)
|
|
goto out;
|
|
|
|
if (rproc->state != RPROC_RUNNING) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
ret = _omap_rproc_suspend(rproc, false);
|
|
if (ret) {
|
|
dev_err(dev, "suspend failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* remoteproc is running at the time of system suspend, so remember
|
|
* it so as to wake it up during system resume
|
|
*/
|
|
oproc->need_resume = true;
|
|
rproc->state = RPROC_SUSPENDED;
|
|
|
|
out:
|
|
mutex_unlock(&rproc->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int __maybe_unused omap_rproc_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct rproc *rproc = platform_get_drvdata(pdev);
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&rproc->lock);
|
|
if (rproc->state == RPROC_OFFLINE)
|
|
goto out;
|
|
|
|
if (rproc->state != RPROC_SUSPENDED) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* remoteproc was auto-suspended at the time of system suspend,
|
|
* so no need to wake-up the processor (leave it in suspended
|
|
* state, will be woken up during a subsequent runtime_resume)
|
|
*/
|
|
if (!oproc->need_resume)
|
|
goto out;
|
|
|
|
ret = _omap_rproc_resume(rproc, false);
|
|
if (ret) {
|
|
dev_err(dev, "resume failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
oproc->need_resume = false;
|
|
rproc->state = RPROC_RUNNING;
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
out:
|
|
mutex_unlock(&rproc->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int omap_rproc_runtime_suspend(struct device *dev)
|
|
{
|
|
struct rproc *rproc = dev_get_drvdata(dev);
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
int ret;
|
|
|
|
mutex_lock(&rproc->lock);
|
|
if (rproc->state == RPROC_CRASHED) {
|
|
dev_dbg(dev, "rproc cannot be runtime suspended when crashed!\n");
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
if (WARN_ON(rproc->state != RPROC_RUNNING)) {
|
|
dev_err(dev, "rproc cannot be runtime suspended when not running!\n");
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* do not even attempt suspend if the remote processor is not
|
|
* idled for runtime auto-suspend
|
|
*/
|
|
if (!_is_rproc_in_standby(oproc)) {
|
|
ret = -EBUSY;
|
|
goto abort;
|
|
}
|
|
|
|
ret = _omap_rproc_suspend(rproc, true);
|
|
if (ret)
|
|
goto abort;
|
|
|
|
rproc->state = RPROC_SUSPENDED;
|
|
mutex_unlock(&rproc->lock);
|
|
return 0;
|
|
|
|
abort:
|
|
pm_runtime_mark_last_busy(dev);
|
|
out:
|
|
mutex_unlock(&rproc->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int omap_rproc_runtime_resume(struct device *dev)
|
|
{
|
|
struct rproc *rproc = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
mutex_lock(&rproc->lock);
|
|
if (WARN_ON(rproc->state != RPROC_SUSPENDED)) {
|
|
dev_err(dev, "rproc cannot be runtime resumed if not suspended! state=%d\n",
|
|
rproc->state);
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
ret = _omap_rproc_resume(rproc, true);
|
|
if (ret) {
|
|
dev_err(dev, "runtime resume failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
rproc->state = RPROC_RUNNING;
|
|
out:
|
|
mutex_unlock(&rproc->lock);
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_PM */
|
|
|
|
static const struct omap_rproc_mem_data ipu_mems[] = {
|
|
{ .name = "l2ram", .dev_addr = 0x20000000 },
|
|
{ },
|
|
};
|
|
|
|
static const struct omap_rproc_mem_data dra7_dsp_mems[] = {
|
|
{ .name = "l2ram", .dev_addr = 0x800000 },
|
|
{ .name = "l1pram", .dev_addr = 0xe00000 },
|
|
{ .name = "l1dram", .dev_addr = 0xf00000 },
|
|
{ },
|
|
};
|
|
|
|
static const struct omap_rproc_dev_data omap4_dsp_dev_data = {
|
|
.device_name = "dsp",
|
|
};
|
|
|
|
static const struct omap_rproc_dev_data omap4_ipu_dev_data = {
|
|
.device_name = "ipu",
|
|
.mems = ipu_mems,
|
|
};
|
|
|
|
static const struct omap_rproc_dev_data omap5_dsp_dev_data = {
|
|
.device_name = "dsp",
|
|
};
|
|
|
|
static const struct omap_rproc_dev_data omap5_ipu_dev_data = {
|
|
.device_name = "ipu",
|
|
.mems = ipu_mems,
|
|
};
|
|
|
|
static const struct omap_rproc_dev_data dra7_dsp_dev_data = {
|
|
.device_name = "dsp",
|
|
.mems = dra7_dsp_mems,
|
|
};
|
|
|
|
static const struct omap_rproc_dev_data dra7_ipu_dev_data = {
|
|
.device_name = "ipu",
|
|
.mems = ipu_mems,
|
|
};
|
|
|
|
static const struct of_device_id omap_rproc_of_match[] = {
|
|
{
|
|
.compatible = "ti,omap4-dsp",
|
|
.data = &omap4_dsp_dev_data,
|
|
},
|
|
{
|
|
.compatible = "ti,omap4-ipu",
|
|
.data = &omap4_ipu_dev_data,
|
|
},
|
|
{
|
|
.compatible = "ti,omap5-dsp",
|
|
.data = &omap5_dsp_dev_data,
|
|
},
|
|
{
|
|
.compatible = "ti,omap5-ipu",
|
|
.data = &omap5_ipu_dev_data,
|
|
},
|
|
{
|
|
.compatible = "ti,dra7-dsp",
|
|
.data = &dra7_dsp_dev_data,
|
|
},
|
|
{
|
|
.compatible = "ti,dra7-ipu",
|
|
.data = &dra7_ipu_dev_data,
|
|
},
|
|
{
|
|
/* end */
|
|
},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, omap_rproc_of_match);
|
|
|
|
static const char *omap_rproc_get_firmware(struct platform_device *pdev)
|
|
{
|
|
const char *fw_name;
|
|
int ret;
|
|
|
|
ret = of_property_read_string(pdev->dev.of_node, "firmware-name",
|
|
&fw_name);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
return fw_name;
|
|
}
|
|
|
|
static int omap_rproc_get_boot_data(struct platform_device *pdev,
|
|
struct rproc *rproc)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
const struct omap_rproc_dev_data *data;
|
|
int ret;
|
|
|
|
data = of_device_get_match_data(&pdev->dev);
|
|
if (!data)
|
|
return -ENODEV;
|
|
|
|
if (!of_property_read_bool(np, "ti,bootreg"))
|
|
return 0;
|
|
|
|
oproc->boot_data = devm_kzalloc(&pdev->dev, sizeof(*oproc->boot_data),
|
|
GFP_KERNEL);
|
|
if (!oproc->boot_data)
|
|
return -ENOMEM;
|
|
|
|
oproc->boot_data->syscon =
|
|
syscon_regmap_lookup_by_phandle(np, "ti,bootreg");
|
|
if (IS_ERR(oproc->boot_data->syscon)) {
|
|
ret = PTR_ERR(oproc->boot_data->syscon);
|
|
return ret;
|
|
}
|
|
|
|
if (of_property_read_u32_index(np, "ti,bootreg", 1,
|
|
&oproc->boot_data->boot_reg)) {
|
|
dev_err(&pdev->dev, "couldn't get the boot register\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
of_property_read_u32_index(np, "ti,bootreg", 2,
|
|
&oproc->boot_data->boot_reg_shift);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
|
|
struct rproc *rproc)
|
|
{
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct device *dev = &pdev->dev;
|
|
const struct omap_rproc_dev_data *data;
|
|
struct resource *res;
|
|
int num_mems;
|
|
int i;
|
|
|
|
data = of_device_get_match_data(dev);
|
|
if (!data)
|
|
return -ENODEV;
|
|
|
|
if (!data->mems)
|
|
return 0;
|
|
|
|
num_mems = of_property_count_elems_of_size(dev->of_node, "reg",
|
|
sizeof(u32)) / 2;
|
|
|
|
oproc->mem = devm_kcalloc(dev, num_mems, sizeof(*oproc->mem),
|
|
GFP_KERNEL);
|
|
if (!oproc->mem)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; data->mems[i].name; i++) {
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
|
|
data->mems[i].name);
|
|
if (!res) {
|
|
dev_err(dev, "no memory defined for %s\n",
|
|
data->mems[i].name);
|
|
return -ENOMEM;
|
|
}
|
|
oproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(oproc->mem[i].cpu_addr)) {
|
|
dev_err(dev, "failed to parse and map %s memory\n",
|
|
data->mems[i].name);
|
|
return PTR_ERR(oproc->mem[i].cpu_addr);
|
|
}
|
|
oproc->mem[i].bus_addr = res->start;
|
|
oproc->mem[i].dev_addr = data->mems[i].dev_addr;
|
|
oproc->mem[i].size = resource_size(res);
|
|
|
|
dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %pK da 0x%x\n",
|
|
data->mems[i].name, &oproc->mem[i].bus_addr,
|
|
oproc->mem[i].size, oproc->mem[i].cpu_addr,
|
|
oproc->mem[i].dev_addr);
|
|
}
|
|
oproc->num_mems = num_mems;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OMAP_REMOTEPROC_WATCHDOG
|
|
static int omap_rproc_count_wdog_timers(struct device *dev)
|
|
{
|
|
struct device_node *np = dev->of_node;
|
|
int ret;
|
|
|
|
ret = of_count_phandle_with_args(np, "ti,watchdog-timers", NULL);
|
|
if (ret <= 0) {
|
|
dev_dbg(dev, "device does not have watchdog timers, status = %d\n",
|
|
ret);
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#else
|
|
static int omap_rproc_count_wdog_timers(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int omap_rproc_of_get_timers(struct platform_device *pdev,
|
|
struct rproc *rproc)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct device *dev = &pdev->dev;
|
|
int num_timers;
|
|
|
|
/*
|
|
* Timer nodes are directly used in client nodes as phandles, so
|
|
* retrieve the count using appropriate size
|
|
*/
|
|
oproc->num_timers = of_count_phandle_with_args(np, "ti,timers", NULL);
|
|
if (oproc->num_timers <= 0) {
|
|
dev_dbg(dev, "device does not have timers, status = %d\n",
|
|
oproc->num_timers);
|
|
oproc->num_timers = 0;
|
|
}
|
|
|
|
oproc->num_wd_timers = omap_rproc_count_wdog_timers(dev);
|
|
|
|
num_timers = oproc->num_timers + oproc->num_wd_timers;
|
|
if (num_timers) {
|
|
oproc->timers = devm_kcalloc(dev, num_timers,
|
|
sizeof(*oproc->timers),
|
|
GFP_KERNEL);
|
|
if (!oproc->timers)
|
|
return -ENOMEM;
|
|
|
|
dev_dbg(dev, "device has %d tick timers and %d watchdog timers\n",
|
|
oproc->num_timers, oproc->num_wd_timers);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_rproc_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct omap_rproc *oproc;
|
|
struct rproc *rproc;
|
|
const char *firmware;
|
|
int ret;
|
|
struct reset_control *reset;
|
|
|
|
if (!np) {
|
|
dev_err(&pdev->dev, "only DT-based devices are supported\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
reset = devm_reset_control_array_get_exclusive(&pdev->dev);
|
|
if (IS_ERR(reset))
|
|
return PTR_ERR(reset);
|
|
|
|
firmware = omap_rproc_get_firmware(pdev);
|
|
if (IS_ERR(firmware))
|
|
return PTR_ERR(firmware);
|
|
|
|
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
rproc = rproc_alloc(&pdev->dev, dev_name(&pdev->dev), &omap_rproc_ops,
|
|
firmware, sizeof(*oproc));
|
|
if (!rproc)
|
|
return -ENOMEM;
|
|
|
|
oproc = rproc->priv;
|
|
oproc->rproc = rproc;
|
|
oproc->reset = reset;
|
|
/* All existing OMAP IPU and DSP processors have an MMU */
|
|
rproc->has_iommu = true;
|
|
|
|
ret = omap_rproc_of_get_internal_memories(pdev, rproc);
|
|
if (ret)
|
|
goto free_rproc;
|
|
|
|
ret = omap_rproc_get_boot_data(pdev, rproc);
|
|
if (ret)
|
|
goto free_rproc;
|
|
|
|
ret = omap_rproc_of_get_timers(pdev, rproc);
|
|
if (ret)
|
|
goto free_rproc;
|
|
|
|
init_completion(&oproc->pm_comp);
|
|
oproc->autosuspend_delay = DEFAULT_AUTOSUSPEND_DELAY;
|
|
|
|
of_property_read_u32(pdev->dev.of_node, "ti,autosuspend-delay-ms",
|
|
&oproc->autosuspend_delay);
|
|
|
|
pm_runtime_set_autosuspend_delay(&pdev->dev, oproc->autosuspend_delay);
|
|
|
|
oproc->fck = devm_clk_get(&pdev->dev, 0);
|
|
if (IS_ERR(oproc->fck)) {
|
|
ret = PTR_ERR(oproc->fck);
|
|
goto free_rproc;
|
|
}
|
|
|
|
ret = of_reserved_mem_device_init(&pdev->dev);
|
|
if (ret) {
|
|
dev_warn(&pdev->dev, "device does not have specific CMA pool.\n");
|
|
dev_warn(&pdev->dev, "Typically this should be provided,\n");
|
|
dev_warn(&pdev->dev, "only omit if you know what you are doing.\n");
|
|
}
|
|
|
|
platform_set_drvdata(pdev, rproc);
|
|
|
|
ret = rproc_add(rproc);
|
|
if (ret)
|
|
goto release_mem;
|
|
|
|
return 0;
|
|
|
|
release_mem:
|
|
of_reserved_mem_device_release(&pdev->dev);
|
|
free_rproc:
|
|
rproc_free(rproc);
|
|
return ret;
|
|
}
|
|
|
|
static int omap_rproc_remove(struct platform_device *pdev)
|
|
{
|
|
struct rproc *rproc = platform_get_drvdata(pdev);
|
|
|
|
rproc_del(rproc);
|
|
rproc_free(rproc);
|
|
of_reserved_mem_device_release(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops omap_rproc_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(omap_rproc_suspend, omap_rproc_resume)
|
|
SET_RUNTIME_PM_OPS(omap_rproc_runtime_suspend,
|
|
omap_rproc_runtime_resume, NULL)
|
|
};
|
|
|
|
static struct platform_driver omap_rproc_driver = {
|
|
.probe = omap_rproc_probe,
|
|
.remove = omap_rproc_remove,
|
|
.driver = {
|
|
.name = "omap-rproc",
|
|
.pm = &omap_rproc_pm_ops,
|
|
.of_match_table = omap_rproc_of_match,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(omap_rproc_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("OMAP Remote Processor control driver");
|