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author | Simon Glass <sjg@chromium.org> | 2014-02-26 15:59:23 -0700 |
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committer | Tom Rini <trini@ti.com> | 2014-03-04 12:15:29 -0500 |
commit | 39f7611fecc55cbde02c8a84f7c12861abe31b53 (patch) | |
tree | fad8c2ae3ea79c6a1de35e94252d0a6d01191fe1 /common | |
parent | 0681195977ce04347f7de8ba88d9ebba10cae6dc (diff) | |
download | u-boot-39f7611fecc55cbde02c8a84f7c12861abe31b53.zip u-boot-39f7611fecc55cbde02c8a84f7c12861abe31b53.tar.gz u-boot-39f7611fecc55cbde02c8a84f7c12861abe31b53.tar.bz2 |
dm: Add a demonstration/example driver
As an example of how to write a uclass and a driver, provide a demo version
of each, accessible through the 'demo' command.
To use these with driver model, define CONFIG_CMD_DEMO and CONFIG_DM_DEMO.
The two demo drivers are enabled with CONFIG_DM_DEMO_SIMPLE and
CONFIG_DM_DEMO_SHAPE.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com>
Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com>
Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
Diffstat (limited to 'common')
-rw-r--r-- | common/Makefile | 1 | ||||
-rw-r--r-- | common/cmd_demo.c | 102 |
2 files changed, 103 insertions, 0 deletions
diff --git a/common/Makefile b/common/Makefile index ca9af13..04e9cdd 100644 --- a/common/Makefile +++ b/common/Makefile @@ -64,6 +64,7 @@ obj-$(CONFIG_CMD_CONSOLE) += cmd_console.o obj-$(CONFIG_CMD_CPLBINFO) += cmd_cplbinfo.o obj-$(CONFIG_DATAFLASH_MMC_SELECT) += cmd_dataflash_mmc_mux.o obj-$(CONFIG_CMD_DATE) += cmd_date.o +obj-$(CONFIG_CMD_DEMO) += cmd_demo.o obj-$(CONFIG_CMD_SOUND) += cmd_sound.o ifdef CONFIG_4xx obj-$(CONFIG_CMD_SETGETDCR) += cmd_dcr.o diff --git a/common/cmd_demo.c b/common/cmd_demo.c new file mode 100644 index 0000000..a3bba7f --- /dev/null +++ b/common/cmd_demo.c @@ -0,0 +1,102 @@ +/* + * Copyright (c) 2013 Google, Inc + * + * (C) Copyright 2012 + * Pavel Herrmann <morpheus.ibis@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm-demo.h> +#include <asm/io.h> + +struct device *demo_dev; + +static int do_demo_hello(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + int ch = 0; + + if (argc) + ch = *argv[0]; + + return demo_hello(demo_dev, ch); +} + +static int do_demo_status(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + int status; + int ret; + + ret = demo_status(demo_dev, &status); + if (ret) + return ret; + + printf("Status: %d\n", status); + + return 0; +} + +int do_demo_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + struct device *dev; + int i, ret; + + puts("Demo uclass entries:\n"); + + for (i = 0, ret = uclass_first_device(UCLASS_DEMO, &dev); + dev; + ret = uclass_next_device(&dev)) { + printf("entry %d - instance %08x, ops %08x, platdata %08x\n", + i++, map_to_sysmem(dev), + map_to_sysmem(dev->driver->ops), + map_to_sysmem(dev_get_platdata(dev))); + } + + return cmd_process_error(cmdtp, ret); +} + +static cmd_tbl_t demo_commands[] = { + U_BOOT_CMD_MKENT(list, 0, 1, do_demo_list, "", ""), + U_BOOT_CMD_MKENT(hello, 2, 1, do_demo_hello, "", ""), + U_BOOT_CMD_MKENT(status, 1, 1, do_demo_status, "", ""), +}; + +static int do_demo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + cmd_tbl_t *demo_cmd; + int devnum = 0; + int ret; + + if (argc < 2) + return CMD_RET_USAGE; + demo_cmd = find_cmd_tbl(argv[1], demo_commands, + ARRAY_SIZE(demo_commands)); + argc -= 2; + argv += 2; + if (!demo_cmd || argc > demo_cmd->maxargs) + return CMD_RET_USAGE; + + if (argc) { + devnum = simple_strtoul(argv[0], NULL, 10); + ret = uclass_get_device(UCLASS_DEMO, devnum, &demo_dev); + if (ret) + return cmd_process_error(cmdtp, ret); + argc--; + argv++; + } + + ret = demo_cmd->cmd(demo_cmd, flag, argc, argv); + + return cmd_process_error(demo_cmd, ret); +} + +U_BOOT_CMD( + demo, 4, 1, do_demo, + "Driver model (dm) demo operations", + "list List available demo devices\n" + "demo hello <num> [<char>] Say hello\n" + "demo status <num> Get demo device status" +); |