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1398 lines
37 KiB
1398 lines
37 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* OMAP Remote Processor driver |
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* |
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* Copyright (C) 2011-2020 Texas Instruments Incorporated - http://www.ti.com/ |
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* Copyright (C) 2011 Google, Inc. |
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* |
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* Ohad Ben-Cohen <[email protected]> |
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* Brian Swetland <[email protected]> |
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* Fernando Guzman Lugo <[email protected]> |
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* Mark Grosen <[email protected]> |
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* Suman Anna <[email protected]> |
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* Hari Kanigeri <[email protected]> |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/clk.h> |
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#include <linux/clk/ti.h> |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <linux/of_device.h> |
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#include <linux/of_reserved_mem.h> |
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#include <linux/platform_device.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/interrupt.h> |
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#include <linux/remoteproc.h> |
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#include <linux/mailbox_client.h> |
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#include <linux/omap-iommu.h> |
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#include <linux/omap-mailbox.h> |
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#include <linux/regmap.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/reset.h> |
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#include <clocksource/timer-ti-dm.h> |
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|
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#include <linux/platform_data/dmtimer-omap.h> |
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|
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#include "omap_remoteproc.h" |
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#include "remoteproc_internal.h" |
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|
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/* default auto-suspend delay (ms) */ |
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#define DEFAULT_AUTOSUSPEND_DELAY 10000 |
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|
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/** |
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* struct omap_rproc_boot_data - boot data structure for the DSP omap rprocs |
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* @syscon: regmap handle for the system control configuration module |
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* @boot_reg: boot register offset within the @syscon regmap |
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* @boot_reg_shift: bit-field shift required for the boot address value in |
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* @boot_reg |
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*/ |
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struct omap_rproc_boot_data { |
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struct regmap *syscon; |
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unsigned int boot_reg; |
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unsigned int boot_reg_shift; |
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}; |
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|
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/** |
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* struct omap_rproc_mem - internal memory structure |
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* @cpu_addr: MPU virtual address of the memory region |
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* @bus_addr: bus address used to access the memory region |
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* @dev_addr: device address of the memory region from DSP view |
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* @size: size of the memory region |
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*/ |
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struct omap_rproc_mem { |
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void __iomem *cpu_addr; |
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phys_addr_t bus_addr; |
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u32 dev_addr; |
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size_t size; |
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}; |
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|
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/** |
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* struct omap_rproc_timer - data structure for a timer used by a omap rproc |
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* @odt: timer pointer |
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* @timer_ops: OMAP dmtimer ops for @odt timer |
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* @irq: timer irq |
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*/ |
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struct omap_rproc_timer { |
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struct omap_dm_timer *odt; |
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const struct omap_dm_timer_ops *timer_ops; |
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int irq; |
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}; |
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|
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/** |
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* struct omap_rproc - omap remote processor state |
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* @mbox: mailbox channel handle |
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* @client: mailbox client to request the mailbox channel |
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* @boot_data: boot data structure for setting processor boot address |
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* @mem: internal memory regions data |
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* @num_mems: number of internal memory regions |
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* @num_timers: number of rproc timer(s) |
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* @num_wd_timers: number of rproc watchdog timers |
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* @timers: timer(s) info used by rproc |
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* @autosuspend_delay: auto-suspend delay value to be used for runtime pm |
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* @need_resume: if true a resume is needed in the system resume callback |
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* @rproc: rproc handle |
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* @reset: reset handle |
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* @pm_comp: completion primitive to sync for suspend response |
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* @fck: functional clock for the remoteproc |
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* @suspend_acked: state machine flag to store the suspend request ack |
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*/ |
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struct omap_rproc { |
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struct mbox_chan *mbox; |
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struct mbox_client client; |
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struct omap_rproc_boot_data *boot_data; |
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struct omap_rproc_mem *mem; |
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int num_mems; |
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int num_timers; |
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int num_wd_timers; |
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struct omap_rproc_timer *timers; |
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int autosuspend_delay; |
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bool need_resume; |
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struct rproc *rproc; |
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struct reset_control *reset; |
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struct completion pm_comp; |
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struct clk *fck; |
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bool suspend_acked; |
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}; |
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|
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/** |
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* struct omap_rproc_mem_data - memory definitions for an omap remote processor |
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* @name: name for this memory entry |
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* @dev_addr: device address for the memory entry |
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*/ |
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struct omap_rproc_mem_data { |
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const char *name; |
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const u32 dev_addr; |
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}; |
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|
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/** |
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* struct omap_rproc_dev_data - device data for the omap remote processor |
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* @device_name: device name of the remote processor |
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* @mems: memory definitions for this remote processor |
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*/ |
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struct omap_rproc_dev_data { |
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const char *device_name; |
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const struct omap_rproc_mem_data *mems; |
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}; |
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|
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/** |
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* omap_rproc_request_timer() - request a timer for a remoteproc |
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* @dev: device requesting the timer |
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* @np: device node pointer to the desired timer |
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* @timer: handle to a struct omap_rproc_timer to return the timer handle |
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* |
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* This helper function is used primarily to request a timer associated with |
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* a remoteproc. The returned handle is stored in the .odt field of the |
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* @timer structure passed in, and is used to invoke other timer specific |
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* ops (like starting a timer either during device initialization or during |
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* a resume operation, or for stopping/freeing a timer). |
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* |
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* Return: 0 on success, otherwise an appropriate failure |
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*/ |
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static int omap_rproc_request_timer(struct device *dev, struct device_node *np, |
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struct omap_rproc_timer *timer) |
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{ |
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int ret; |
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|
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timer->odt = timer->timer_ops->request_by_node(np); |
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if (!timer->odt) { |
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dev_err(dev, "request for timer node %p failed\n", np); |
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return -EBUSY; |
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} |
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|
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ret = timer->timer_ops->set_source(timer->odt, OMAP_TIMER_SRC_SYS_CLK); |
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if (ret) { |
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dev_err(dev, "error setting OMAP_TIMER_SRC_SYS_CLK as source for timer node %p\n", |
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np); |
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timer->timer_ops->free(timer->odt); |
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return ret; |
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} |
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|
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/* clean counter, remoteproc code will set the value */ |
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timer->timer_ops->set_load(timer->odt, 0); |
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|
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return 0; |
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} |
|
|
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/** |
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* omap_rproc_start_timer() - start a timer for a remoteproc |
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* @timer: handle to a OMAP rproc timer |
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* |
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* This helper function is used to start a timer associated with a remoteproc, |
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* obtained using the request_timer ops. The helper function needs to be |
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* invoked by the driver to start the timer (during device initialization) |
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* or to just resume the timer. |
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* |
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* Return: 0 on success, otherwise a failure as returned by DMTimer ops |
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*/ |
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static inline int omap_rproc_start_timer(struct omap_rproc_timer *timer) |
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{ |
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return timer->timer_ops->start(timer->odt); |
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} |
|
|
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/** |
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* omap_rproc_stop_timer() - stop a timer for a remoteproc |
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* @timer: handle to a OMAP rproc timer |
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* |
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* This helper function is used to disable a timer associated with a |
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* remoteproc, and needs to be called either during a device shutdown |
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* or suspend operation. The separate helper function allows the driver |
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* to just stop a timer without having to release the timer during a |
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* suspend operation. |
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* |
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* Return: 0 on success, otherwise a failure as returned by DMTimer ops |
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*/ |
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static inline int omap_rproc_stop_timer(struct omap_rproc_timer *timer) |
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{ |
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return timer->timer_ops->stop(timer->odt); |
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} |
|
|
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/** |
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* omap_rproc_release_timer() - release a timer for a remoteproc |
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* @timer: handle to a OMAP rproc timer |
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* |
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* This helper function is used primarily to release a timer associated |
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* with a remoteproc. The dmtimer will be available for other clients to |
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* use once released. |
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* |
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* Return: 0 on success, otherwise a failure as returned by DMTimer ops |
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*/ |
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static inline int omap_rproc_release_timer(struct omap_rproc_timer *timer) |
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{ |
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return timer->timer_ops->free(timer->odt); |
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} |
|
|
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/** |
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* omap_rproc_get_timer_irq() - get the irq for a timer |
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* @timer: handle to a OMAP rproc timer |
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* |
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* This function is used to get the irq associated with a watchdog timer. The |
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* function is called by the OMAP remoteproc driver to register a interrupt |
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* handler to handle watchdog events on the remote processor. |
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* |
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* Return: irq id on success, otherwise a failure as returned by DMTimer ops |
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*/ |
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static inline int omap_rproc_get_timer_irq(struct omap_rproc_timer *timer) |
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{ |
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return timer->timer_ops->get_irq(timer->odt); |
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} |
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|
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/** |
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* omap_rproc_ack_timer_irq() - acknowledge a timer irq |
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* @timer: handle to a OMAP rproc timer |
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* |
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* This function is used to clear the irq associated with a watchdog timer. The |
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* The function is called by the OMAP remoteproc upon a watchdog event on the |
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* remote processor to clear the interrupt status of the watchdog timer. |
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*/ |
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static inline void omap_rproc_ack_timer_irq(struct omap_rproc_timer *timer) |
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{ |
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timer->timer_ops->write_status(timer->odt, OMAP_TIMER_INT_OVERFLOW); |
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} |
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|
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/** |
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* omap_rproc_watchdog_isr() - Watchdog ISR handler for remoteproc device |
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* @irq: IRQ number associated with a watchdog timer |
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* @data: IRQ handler data |
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* |
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* This ISR routine executes the required necessary low-level code to |
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* acknowledge a watchdog timer interrupt. There can be multiple watchdog |
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* timers associated with a rproc (like IPUs which have 2 watchdog timers, |
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* one per Cortex M3/M4 core), so a lookup has to be performed to identify |
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* the timer to acknowledge its interrupt. |
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* |
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* The function also invokes rproc_report_crash to report the watchdog event |
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* to the remoteproc driver core, to trigger a recovery. |
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* |
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* Return: IRQ_HANDLED on success, otherwise IRQ_NONE |
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*/ |
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static irqreturn_t omap_rproc_watchdog_isr(int irq, void *data) |
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{ |
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struct rproc *rproc = data; |
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struct omap_rproc *oproc = rproc->priv; |
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struct device *dev = rproc->dev.parent; |
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struct omap_rproc_timer *timers = oproc->timers; |
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struct omap_rproc_timer *wd_timer = NULL; |
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int num_timers = oproc->num_timers + oproc->num_wd_timers; |
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int i; |
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|
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for (i = oproc->num_timers; i < num_timers; i++) { |
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if (timers[i].irq > 0 && irq == timers[i].irq) { |
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wd_timer = &timers[i]; |
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break; |
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} |
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} |
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|
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if (!wd_timer) { |
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dev_err(dev, "invalid timer\n"); |
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return IRQ_NONE; |
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} |
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omap_rproc_ack_timer_irq(wd_timer); |
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rproc_report_crash(rproc, RPROC_WATCHDOG); |
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return IRQ_HANDLED; |
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} |
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/** |
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* omap_rproc_enable_timers() - enable the timers for a remoteproc |
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* @rproc: handle of a remote processor |
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* @configure: boolean flag used to acquire and configure the timer handle |
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* |
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* This function is used primarily to enable the timers associated with |
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* a remoteproc. The configure flag is provided to allow the driver to |
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* to either acquire and start a timer (during device initialization) or |
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* to just start a timer (during a resume operation). |
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* |
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* Return: 0 on success, otherwise an appropriate failure |
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*/ |
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static int omap_rproc_enable_timers(struct rproc *rproc, bool configure) |
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{ |
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int i; |
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int ret = 0; |
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struct platform_device *tpdev; |
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struct dmtimer_platform_data *tpdata; |
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const struct omap_dm_timer_ops *timer_ops; |
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struct omap_rproc *oproc = rproc->priv; |
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struct omap_rproc_timer *timers = oproc->timers; |
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struct device *dev = rproc->dev.parent; |
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struct device_node *np = NULL; |
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int num_timers = oproc->num_timers + oproc->num_wd_timers; |
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|
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if (!num_timers) |
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return 0; |
|
|
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if (!configure) |
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goto start_timers; |
|
|
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for (i = 0; i < num_timers; i++) { |
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if (i < oproc->num_timers) |
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np = of_parse_phandle(dev->of_node, "ti,timers", i); |
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else |
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np = of_parse_phandle(dev->of_node, |
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"ti,watchdog-timers", |
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(i - oproc->num_timers)); |
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if (!np) { |
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ret = -ENXIO; |
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dev_err(dev, "device node lookup for timer at index %d failed: %d\n", |
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i < oproc->num_timers ? i : |
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i - oproc->num_timers, ret); |
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goto free_timers; |
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} |
|
|
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tpdev = of_find_device_by_node(np); |
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if (!tpdev) { |
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ret = -ENODEV; |
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dev_err(dev, "could not get timer platform device\n"); |
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goto put_node; |
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} |
|
|
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tpdata = dev_get_platdata(&tpdev->dev); |
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put_device(&tpdev->dev); |
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if (!tpdata) { |
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ret = -EINVAL; |
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dev_err(dev, "dmtimer pdata structure NULL\n"); |
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goto put_node; |
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} |
|
|
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timer_ops = tpdata->timer_ops; |
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if (!timer_ops || !timer_ops->request_by_node || |
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!timer_ops->set_source || !timer_ops->set_load || |
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!timer_ops->free || !timer_ops->start || |
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!timer_ops->stop || !timer_ops->get_irq || |
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!timer_ops->write_status) { |
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ret = -EINVAL; |
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dev_err(dev, "device does not have required timer ops\n"); |
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goto put_node; |
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} |
|
|
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timers[i].irq = -1; |
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timers[i].timer_ops = timer_ops; |
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ret = omap_rproc_request_timer(dev, np, &timers[i]); |
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if (ret) { |
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dev_err(dev, "request for timer %p failed: %d\n", np, |
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ret); |
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goto put_node; |
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} |
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of_node_put(np); |
|
|
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if (i >= oproc->num_timers) { |
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timers[i].irq = omap_rproc_get_timer_irq(&timers[i]); |
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if (timers[i].irq < 0) { |
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dev_err(dev, "get_irq for timer %p failed: %d\n", |
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np, timers[i].irq); |
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ret = -EBUSY; |
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goto free_timers; |
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} |
|
|
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ret = request_irq(timers[i].irq, |
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omap_rproc_watchdog_isr, IRQF_SHARED, |
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"rproc-wdt", rproc); |
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if (ret) { |
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dev_err(dev, "error requesting irq for timer %p\n", |
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np); |
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omap_rproc_release_timer(&timers[i]); |
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timers[i].odt = NULL; |
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timers[i].timer_ops = NULL; |
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timers[i].irq = -1; |
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goto free_timers; |
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} |
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} |
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} |
|
|
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start_timers: |
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for (i = 0; i < num_timers; i++) { |
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ret = omap_rproc_start_timer(&timers[i]); |
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if (ret) { |
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dev_err(dev, "start timer %p failed failed: %d\n", np, |
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ret); |
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break; |
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} |
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} |
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if (ret) { |
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while (i >= 0) { |
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omap_rproc_stop_timer(&timers[i]); |
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i--; |
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} |
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goto put_node; |
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} |
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return 0; |
|
|
|
put_node: |
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if (configure) |
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of_node_put(np); |
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free_timers: |
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while (i--) { |
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if (i >= oproc->num_timers) |
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free_irq(timers[i].irq, rproc); |
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omap_rproc_release_timer(&timers[i]); |
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timers[i].odt = NULL; |
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timers[i].timer_ops = NULL; |
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timers[i].irq = -1; |
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} |
|
|
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return ret; |
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} |
|
|
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/** |
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* 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 |
|
*/ |
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static int omap_rproc_disable_timers(struct rproc *rproc, bool configure) |
|
{ |
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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, bool *is_iomem) |
|
{ |
|
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");
|
|
|