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4e57b68178
I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/*
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* firmware_sample_driver.c -
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*
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* Copyright (c) 2003 Manuel Estrada Sainz <ranty@debian.org>
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*
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* Sample code on how to use request_firmware() from drivers.
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*
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* Note that register_firmware() is currently useless.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/string.h>
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#include "linux/firmware.h"
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#define WE_CAN_NEED_FIRMWARE_BEFORE_USERSPACE_IS_AVAILABLE
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#ifdef WE_CAN_NEED_FIRMWARE_BEFORE_USERSPACE_IS_AVAILABLE
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char __init inkernel_firmware[] = "let's say that this is firmware\n";
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#endif
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static struct device ghost_device = {
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.name = "Ghost Device",
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.bus_id = "ghost0",
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};
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static void sample_firmware_load(char *firmware, int size)
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{
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u8 buf[size+1];
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memcpy(buf, firmware, size);
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buf[size] = '\0';
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printk(KERN_INFO "firmware_sample_driver: firmware: %s\n", buf);
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}
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static void sample_probe_default(void)
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{
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/* uses the default method to get the firmware */
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const struct firmware *fw_entry;
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printk(KERN_INFO "firmware_sample_driver: a ghost device got inserted :)\n");
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if(request_firmware(&fw_entry, "sample_driver_fw", &ghost_device)!=0)
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{
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printk(KERN_ERR
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"firmware_sample_driver: Firmware not available\n");
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return;
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}
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sample_firmware_load(fw_entry->data, fw_entry->size);
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release_firmware(fw_entry);
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/* finish setting up the device */
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}
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static void sample_probe_specific(void)
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{
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/* Uses some specific hotplug support to get the firmware from
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* userspace directly into the hardware, or via some sysfs file */
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/* NOTE: This currently doesn't work */
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printk(KERN_INFO "firmware_sample_driver: a ghost device got inserted :)\n");
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if(request_firmware(NULL, "sample_driver_fw", &ghost_device)!=0)
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{
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printk(KERN_ERR
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"firmware_sample_driver: Firmware load failed\n");
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return;
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}
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/* request_firmware blocks until userspace finished, so at
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* this point the firmware should be already in the device */
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/* finish setting up the device */
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}
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static void sample_probe_async_cont(const struct firmware *fw, void *context)
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{
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if(!fw){
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printk(KERN_ERR
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"firmware_sample_driver: firmware load failed\n");
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return;
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}
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printk(KERN_INFO "firmware_sample_driver: device pointer \"%s\"\n",
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(char *)context);
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sample_firmware_load(fw->data, fw->size);
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}
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static void sample_probe_async(void)
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{
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/* Let's say that I can't sleep */
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int error;
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error = request_firmware_nowait (THIS_MODULE,
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"sample_driver_fw", &ghost_device,
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"my device pointer",
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sample_probe_async_cont);
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if(error){
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printk(KERN_ERR
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"firmware_sample_driver:"
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" request_firmware_nowait failed\n");
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}
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}
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static int sample_init(void)
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{
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#ifdef WE_CAN_NEED_FIRMWARE_BEFORE_USERSPACE_IS_AVAILABLE
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register_firmware("sample_driver_fw", inkernel_firmware,
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sizeof(inkernel_firmware));
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#endif
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device_initialize(&ghost_device);
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/* since there is no real hardware insertion I just call the
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* sample probe functions here */
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sample_probe_specific();
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sample_probe_default();
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sample_probe_async();
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return 0;
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}
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static void __exit sample_exit(void)
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{
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}
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module_init (sample_init);
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module_exit (sample_exit);
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MODULE_LICENSE("GPL");
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