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upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/drivers/remoteproc/sandbox_testproc.c

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
7 years ago
// SPDX-License-Identifier: GPL-2.0+
remoteproc: Introduce a sandbox dummy driver Introduce a dummy driver for sandbox that allows us to verify basic functionality. This is not meant to do anything functional - but is more or less meant as a framework plumbing debug helper. The sandbox remoteproc driver maintains absolutey no states and is a simple driver which just is filled with empty hooks. Idea being to give an approximate idea to implement own remoteproc driver using this as a template. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Simon Glass <sjg@chromium.org>
9 years ago
/*
* (C) Copyright 2015
* Texas Instruments Incorporated - http://www.ti.com/
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <remoteproc.h>
/**
* enum sandbox_state - different device states
* @sb_booted: Entry condition, just booted
* @sb_init: Initialized (basic environment is ready)
* @sb_reset: Held in reset (accessible, but not running)
* @sb_loaded: Loaded with image (but not running)
* @sb_running: Processor is running
*/
enum sandbox_state {
sb_booted,
sb_init,
sb_reset,
sb_loaded,
sb_running
};
/**
* struct sandbox_test_devdata - private data per device
* @current_state: device current state
*/
struct sandbox_test_devdata {
enum sandbox_state current_state;
};
/**
* sandbox_dev_move_to_state() - statemachine for our dummy device
* @dev: device to switch state
* @next_state: next proposed state
*
* This tries to follow the following statemachine:
* Entry
* |
* v
* +-------+
* +---+ init |
* | | | <---------------------+
* | +-------+ |
* | |
* | |
* | +--------+ |
* Load| | reset | |
* | | | <----------+ |
* | +--------+ | |
* | |Load | |
* | | | |
* | +----v----+ reset | |
* +-> | | (opt) | |
* | Loaded +-----------+ |
* | | |
* +----+----+ |
* | Start |
* +---v-----+ (opt) |
* +->| Running | Stop |
* Ping +- | +--------------------+
* (opt) +---------+
*
* (is_running does not change state)
*
* Return: 0 when valid state transition is seen, else returns -EINVAL
*/
static int sandbox_dev_move_to_state(struct udevice *dev,
enum sandbox_state next_state)
{
struct sandbox_test_devdata *ddata = dev_get_priv(dev);
/* No state transition is OK */
if (ddata->current_state == next_state)
return 0;
debug("current_state=%d, next_state=%d\n", ddata->current_state,
next_state);
switch (ddata->current_state) {
case sb_booted:
if (next_state == sb_init)
goto ok_state;
break;
case sb_init:
if (next_state == sb_reset || next_state == sb_loaded)
goto ok_state;
break;
case sb_reset:
if (next_state == sb_loaded || next_state == sb_init)
goto ok_state;
break;
case sb_loaded:
if (next_state == sb_reset || next_state == sb_init ||
next_state == sb_running)
goto ok_state;
break;
case sb_running:
if (next_state == sb_reset || next_state == sb_init)
goto ok_state;
break;
};
return -EINVAL;
ok_state:
ddata->current_state = next_state;
return 0;
}
/**
* sandbox_testproc_probe() - basic probe function
* @dev: test proc device that is being probed.
*
* Return: 0 if all went ok, else return appropriate error
*/
static int sandbox_testproc_probe(struct udevice *dev)
{
struct dm_rproc_uclass_pdata *uc_pdata;
struct sandbox_test_devdata *ddata;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
ddata = dev_get_priv(dev);
if (!ddata) {
debug("%s: platform private data missing\n", uc_pdata->name);
return -EINVAL;
}
ret = sandbox_dev_move_to_state(dev, sb_booted);
debug("%s: called(%d)\n", uc_pdata->name, ret);
return ret;
}
/**
* sandbox_testproc_init() - Simple initialization function
* @dev: device to operate upon
*
* Return: 0 if all went ok, else return appropriate error
*/
static int sandbox_testproc_init(struct udevice *dev)
{
struct dm_rproc_uclass_pdata *uc_pdata;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
ret = sandbox_dev_move_to_state(dev, sb_init);
debug("%s: called(%d)\n", uc_pdata->name, ret);
if (ret)
debug("%s init failed\n", uc_pdata->name);
return ret;
}
/**
* sandbox_testproc_reset() - Reset the remote processor
* @dev: device to operate upon
*
* Return: 0 if all went ok, else return appropriate error
*/
static int sandbox_testproc_reset(struct udevice *dev)
{
struct dm_rproc_uclass_pdata *uc_pdata;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
ret = sandbox_dev_move_to_state(dev, sb_reset);
debug("%s: called(%d)\n", uc_pdata->name, ret);
if (ret)
debug("%s reset failed\n", uc_pdata->name);
return ret;
}
/**
* sandbox_testproc_load() - (replace: short desc)
* @dev: device to operate upon
* @addr: Address of the binary image to load
* @size: Size (in bytes) of the binary image to load
*
* Return: 0 if all went ok, else return appropriate error
*/
static int sandbox_testproc_load(struct udevice *dev, ulong addr, ulong size)
{
struct dm_rproc_uclass_pdata *uc_pdata;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
ret = sandbox_dev_move_to_state(dev, sb_loaded);
debug("%s: called(%d) Loading to %08lX %lu size\n",
uc_pdata->name, ret, addr, size);
if (ret)
debug("%s load failed\n", uc_pdata->name);
return ret;
}
/**
* sandbox_testproc_start() - Start the remote processor
* @dev: device to operate upon
*
* Return: 0 if all went ok, else return appropriate error
*/
static int sandbox_testproc_start(struct udevice *dev)
{
struct dm_rproc_uclass_pdata *uc_pdata;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
ret = sandbox_dev_move_to_state(dev, sb_running);
debug("%s: called(%d)\n", uc_pdata->name, ret);
if (ret)
debug("%s start failed\n", uc_pdata->name);
return ret;
}
/**
* sandbox_testproc_stop() - Stop the remote processor
* @dev: device to operate upon
*
* Return: 0 if all went ok, else return appropriate error
*/
static int sandbox_testproc_stop(struct udevice *dev)
{
struct dm_rproc_uclass_pdata *uc_pdata;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
ret = sandbox_dev_move_to_state(dev, sb_init);
debug("%s: called(%d)\n", uc_pdata->name, ret);
if (ret)
debug("%s stop failed\n", uc_pdata->name);
return ret;
}
/**
* sandbox_testproc_is_running() - Check if remote processor is running
* @dev: device to operate upon
*
* Return: 0 if running, 1 if not running
*/
static int sandbox_testproc_is_running(struct udevice *dev)
{
struct dm_rproc_uclass_pdata *uc_pdata;
struct sandbox_test_devdata *ddata;
int ret = 1;
uc_pdata = dev_get_uclass_platdata(dev);
ddata = dev_get_priv(dev);
if (ddata->current_state == sb_running)
ret = 0;
debug("%s: called(%d)\n", uc_pdata->name, ret);
return ret;
}
/**
* sandbox_testproc_ping() - Try pinging remote processor
* @dev: device to operate upon
*
* Return: 0 if running, -EINVAL if not running
*/
static int sandbox_testproc_ping(struct udevice *dev)
{
struct dm_rproc_uclass_pdata *uc_pdata;
struct sandbox_test_devdata *ddata;
int ret;
uc_pdata = dev_get_uclass_platdata(dev);
ddata = dev_get_priv(dev);
if (ddata->current_state == sb_running)
ret = 0;
else
ret = -EINVAL;
debug("%s: called(%d)\n", uc_pdata->name, ret);
if (ret)
debug("%s: No response.(Not started?)\n", uc_pdata->name);
return ret;
}
static const struct dm_rproc_ops sandbox_testproc_ops = {
.init = sandbox_testproc_init,
.reset = sandbox_testproc_reset,
.load = sandbox_testproc_load,
.start = sandbox_testproc_start,
.stop = sandbox_testproc_stop,
.is_running = sandbox_testproc_is_running,
.ping = sandbox_testproc_ping,
};
static const struct udevice_id sandbox_ids[] = {
{.compatible = "sandbox,test-processor"},
{}
};
U_BOOT_DRIVER(sandbox_testproc) = {
.name = "sandbox_test_proc",
.of_match = sandbox_ids,
.id = UCLASS_REMOTEPROC,
.ops = &sandbox_testproc_ops,
.probe = sandbox_testproc_probe,
.priv_auto_alloc_size = sizeof(struct sandbox_test_devdata),
};
/* TODO(nm@ti.com): Remove this along with non-DT support */
static struct dm_rproc_uclass_pdata proc_3_test = {
.name = "proc_3_legacy",
.mem_type = RPROC_INTERNAL_MEMORY_MAPPED,
};
U_BOOT_DEVICE(proc_3_demo) = {
.name = "sandbox_test_proc",
.platdata = &proc_3_test,
};