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- /*
- * A dummy STM device for stm/stm_source class testing.
- * Copyright (c) 2014, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * STM class implements generic infrastructure for System Trace Module devices
- * as defined in MIPI STPv2 specification.
- */
- #undef DEBUG
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/slab.h>
- #include <linux/stm.h>
- static ssize_t
- dummy_stm_packet(struct stm_data *stm_data, unsigned int master,
- unsigned int channel, unsigned int packet, unsigned int flags,
- unsigned int size, const unsigned char *payload)
- {
- #ifdef DEBUG
- u64 pl = 0;
- if (payload)
- pl = *(u64 *)payload;
- if (size < 8)
- pl &= (1ull << (size * 8)) - 1;
- trace_printk("[%u:%u] [pkt: %x/%x] (%llx)\n", master, channel,
- packet, size, pl);
- #endif
- return size;
- }
- static struct stm_data dummy_stm = {
- .name = "dummy_stm",
- .sw_start = 0x0000,
- .sw_end = 0xffff,
- .sw_nchannels = 0xffff,
- .packet = dummy_stm_packet,
- };
- static int dummy_stm_init(void)
- {
- return stm_register_device(NULL, &dummy_stm, THIS_MODULE);
- }
- static void dummy_stm_exit(void)
- {
- stm_unregister_device(&dummy_stm);
- }
- module_init(dummy_stm_init);
- module_exit(dummy_stm_exit);
- MODULE_LICENSE("GPL v2");
- MODULE_DESCRIPTION("dummy_stm device");
- MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@linux.intel.com>");
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