mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 07:16:04 +09:00
20e442ab2d
The current macro is a misnomer since it does not declare a device directly. Instead, it declares driver_info record which U-Boot uses at runtime to create a device. The distinction seems somewhat minor most of the time, but is becomes quite confusing when we actually want to declare a device, with of-platdata. We are left trying to distinguish between a device which isn't actually device, and a device that is (perhaps an 'instance'?) It seems better to rename this macro to describe what it actually is. The macros is not widely used, since boards should use devicetree to declare devices. Rename it to U_BOOT_DRVINFO(), which indicates clearly that this is declaring a new driver_info record, not a device. Signed-off-by: Simon Glass <sjg@chromium.org>
359 lines
8.6 KiB
C
359 lines
8.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015
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* Texas Instruments Incorporated - http://www.ti.com/
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*/
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#define pr_fmt(fmt) "%s: " fmt, __func__
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <remoteproc.h>
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#include <asm/io.h>
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/**
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* enum sandbox_state - different device states
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* @sb_booted: Entry condition, just booted
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* @sb_init: Initialized (basic environment is ready)
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* @sb_reset: Held in reset (accessible, but not running)
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* @sb_loaded: Loaded with image (but not running)
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* @sb_running: Processor is running
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*/
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enum sandbox_state {
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sb_booted,
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sb_init,
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sb_reset,
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sb_loaded,
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sb_running
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};
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/**
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* struct sandbox_test_devdata - private data per device
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* @current_state: device current state
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*/
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struct sandbox_test_devdata {
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enum sandbox_state current_state;
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};
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/**
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* sandbox_dev_move_to_state() - statemachine for our dummy device
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* @dev: device to switch state
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* @next_state: next proposed state
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*
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* This tries to follow the following statemachine:
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* Entry
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* |
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* v
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* +-------+
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* +---+ init |
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* | | | <---------------------+
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* | +-------+ |
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* | |
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* | |
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* | +--------+ |
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* Load| | reset | |
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* | | | <----------+ |
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* | +--------+ | |
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* | |Load | |
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* | | | |
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* | +----v----+ reset | |
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* +-> | | (opt) | |
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* | Loaded +-----------+ |
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* | | |
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* +----+----+ |
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* | Start |
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* +---v-----+ (opt) |
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* +->| Running | Stop |
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* Ping +- | +--------------------+
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* (opt) +---------+
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*
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* (is_running does not change state)
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*
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* Return: 0 when valid state transition is seen, else returns -EINVAL
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*/
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static int sandbox_dev_move_to_state(struct udevice *dev,
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enum sandbox_state next_state)
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{
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struct sandbox_test_devdata *ddata = dev_get_priv(dev);
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/* No state transition is OK */
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if (ddata->current_state == next_state)
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return 0;
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debug("current_state=%d, next_state=%d\n", ddata->current_state,
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next_state);
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switch (ddata->current_state) {
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case sb_booted:
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if (next_state == sb_init)
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goto ok_state;
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break;
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case sb_init:
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if (next_state == sb_reset || next_state == sb_loaded)
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goto ok_state;
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break;
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case sb_reset:
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if (next_state == sb_loaded || next_state == sb_init)
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goto ok_state;
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break;
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case sb_loaded:
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if (next_state == sb_reset || next_state == sb_init ||
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next_state == sb_running)
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goto ok_state;
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break;
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case sb_running:
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if (next_state == sb_reset || next_state == sb_init)
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goto ok_state;
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break;
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};
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return -EINVAL;
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ok_state:
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ddata->current_state = next_state;
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return 0;
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}
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/**
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* sandbox_testproc_probe() - basic probe function
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* @dev: test proc device that is being probed.
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int sandbox_testproc_probe(struct udevice *dev)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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struct sandbox_test_devdata *ddata;
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int ret;
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uc_pdata = dev_get_uclass_plat(dev);
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ddata = dev_get_priv(dev);
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if (!ddata) {
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debug("%s: platform private data missing\n", uc_pdata->name);
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return -EINVAL;
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}
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ret = sandbox_dev_move_to_state(dev, sb_booted);
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debug("%s: called(%d)\n", uc_pdata->name, ret);
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return ret;
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}
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/**
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* sandbox_testproc_init() - Simple initialization function
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* @dev: device to operate upon
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int sandbox_testproc_init(struct udevice *dev)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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int ret;
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uc_pdata = dev_get_uclass_plat(dev);
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ret = sandbox_dev_move_to_state(dev, sb_init);
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debug("%s: called(%d)\n", uc_pdata->name, ret);
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if (ret)
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debug("%s init failed\n", uc_pdata->name);
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return ret;
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}
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/**
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* sandbox_testproc_reset() - Reset the remote processor
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* @dev: device to operate upon
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int sandbox_testproc_reset(struct udevice *dev)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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int ret;
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uc_pdata = dev_get_uclass_plat(dev);
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ret = sandbox_dev_move_to_state(dev, sb_reset);
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debug("%s: called(%d)\n", uc_pdata->name, ret);
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if (ret)
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debug("%s reset failed\n", uc_pdata->name);
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return ret;
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}
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/**
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* sandbox_testproc_load() - (replace: short desc)
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* @dev: device to operate upon
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* @addr: Address of the binary image to load
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* @size: Size (in bytes) of the binary image to load
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int sandbox_testproc_load(struct udevice *dev, ulong addr, ulong size)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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int ret;
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uc_pdata = dev_get_uclass_plat(dev);
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ret = sandbox_dev_move_to_state(dev, sb_loaded);
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debug("%s: called(%d) Loading to %08lX %lu size\n",
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uc_pdata->name, ret, addr, size);
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if (ret)
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debug("%s load failed\n", uc_pdata->name);
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return ret;
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}
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/**
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* sandbox_testproc_start() - Start the remote processor
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* @dev: device to operate upon
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int sandbox_testproc_start(struct udevice *dev)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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int ret;
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uc_pdata = dev_get_uclass_plat(dev);
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ret = sandbox_dev_move_to_state(dev, sb_running);
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debug("%s: called(%d)\n", uc_pdata->name, ret);
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if (ret)
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debug("%s start failed\n", uc_pdata->name);
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return ret;
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}
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/**
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* sandbox_testproc_stop() - Stop the remote processor
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* @dev: device to operate upon
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int sandbox_testproc_stop(struct udevice *dev)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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int ret;
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uc_pdata = dev_get_uclass_plat(dev);
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ret = sandbox_dev_move_to_state(dev, sb_init);
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debug("%s: called(%d)\n", uc_pdata->name, ret);
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if (ret)
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debug("%s stop failed\n", uc_pdata->name);
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return ret;
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}
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/**
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* sandbox_testproc_is_running() - Check if remote processor is running
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* @dev: device to operate upon
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*
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* Return: 0 if running, 1 if not running
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*/
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static int sandbox_testproc_is_running(struct udevice *dev)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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struct sandbox_test_devdata *ddata;
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int ret = 1;
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uc_pdata = dev_get_uclass_plat(dev);
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ddata = dev_get_priv(dev);
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if (ddata->current_state == sb_running)
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ret = 0;
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debug("%s: called(%d)\n", uc_pdata->name, ret);
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return ret;
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}
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/**
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* sandbox_testproc_ping() - Try pinging remote processor
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* @dev: device to operate upon
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*
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* Return: 0 if running, -EINVAL if not running
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*/
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static int sandbox_testproc_ping(struct udevice *dev)
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{
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struct dm_rproc_uclass_pdata *uc_pdata;
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struct sandbox_test_devdata *ddata;
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int ret;
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uc_pdata = dev_get_uclass_plat(dev);
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ddata = dev_get_priv(dev);
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if (ddata->current_state == sb_running)
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ret = 0;
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else
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ret = -EINVAL;
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debug("%s: called(%d)\n", uc_pdata->name, ret);
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if (ret)
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debug("%s: No response.(Not started?)\n", uc_pdata->name);
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return ret;
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}
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#define SANDBOX_RPROC_DEV_TO_PHY_OFFSET 0x1000
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/**
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* sandbox_testproc_device_to_virt() - Convert device address to virtual address
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* @dev: device to operate upon
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* @da: device address
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* @size: Size of the memory region @da is pointing to
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* @return converted virtual address
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*/
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static void *sandbox_testproc_device_to_virt(struct udevice *dev, ulong da,
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ulong size)
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{
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u64 paddr;
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/* Use a simple offset conversion */
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paddr = da + SANDBOX_RPROC_DEV_TO_PHY_OFFSET;
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return phys_to_virt(paddr);
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}
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static const struct dm_rproc_ops sandbox_testproc_ops = {
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.init = sandbox_testproc_init,
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.reset = sandbox_testproc_reset,
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.load = sandbox_testproc_load,
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.start = sandbox_testproc_start,
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.stop = sandbox_testproc_stop,
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.is_running = sandbox_testproc_is_running,
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.ping = sandbox_testproc_ping,
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.device_to_virt = sandbox_testproc_device_to_virt,
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};
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static const struct udevice_id sandbox_ids[] = {
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{.compatible = "sandbox,test-processor"},
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{}
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};
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U_BOOT_DRIVER(sandbox_testproc) = {
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.name = "sandbox_test_proc",
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.of_match = sandbox_ids,
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.id = UCLASS_REMOTEPROC,
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.ops = &sandbox_testproc_ops,
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.probe = sandbox_testproc_probe,
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.priv_auto = sizeof(struct sandbox_test_devdata),
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};
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/* TODO(nm@ti.com): Remove this along with non-DT support */
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static struct dm_rproc_uclass_pdata proc_3_test = {
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.name = "proc_3_legacy",
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.mem_type = RPROC_INTERNAL_MEMORY_MAPPED,
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};
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U_BOOT_DRVINFO(proc_3_demo) = {
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.name = "sandbox_test_proc",
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.plat = &proc_3_test,
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};
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