![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
293 lines
7.3 KiB
C
293 lines
7.3 KiB
C
/*
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* Bluetooth Wacom Tablet support
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2006-2007 Jiri Kosina
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* Copyright (c) 2007 Paul Walmsley
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* Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com>
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* Copyright (c) 2006 Andrew Zabolotny <zap@homelink.ru>
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* Copyright (c) 2009 Bastien Nocera <hadess@hadess.net>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "hid-ids.h"
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struct wacom_data {
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__u16 tool;
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unsigned char butstate;
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};
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static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
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u8 *raw_data, int size)
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{
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struct wacom_data *wdata = hid_get_drvdata(hdev);
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struct hid_input *hidinput;
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struct input_dev *input;
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unsigned char *data = (unsigned char *) raw_data;
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int tool, x, y, rw;
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if (!(hdev->claimed & HID_CLAIMED_INPUT))
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return 0;
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tool = 0;
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hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
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input = hidinput->input;
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/* Check if this is a tablet report */
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if (data[0] != 0x03)
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return 0;
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/* Get X & Y positions */
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x = le16_to_cpu(*(__le16 *) &data[2]);
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y = le16_to_cpu(*(__le16 *) &data[4]);
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/* Get current tool identifier */
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if (data[1] & 0x90) { /* If pen is in the in/active area */
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switch ((data[1] >> 5) & 3) {
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case 0: /* Pen */
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tool = BTN_TOOL_PEN;
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break;
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case 1: /* Rubber */
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tool = BTN_TOOL_RUBBER;
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break;
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case 2: /* Mouse with wheel */
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case 3: /* Mouse without wheel */
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tool = BTN_TOOL_MOUSE;
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break;
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}
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/* Reset tool if out of active tablet area */
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if (!(data[1] & 0x10))
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tool = 0;
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}
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/* If tool changed, notify input subsystem */
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if (wdata->tool != tool) {
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if (wdata->tool) {
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/* Completely reset old tool state */
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if (wdata->tool == BTN_TOOL_MOUSE) {
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input_report_key(input, BTN_LEFT, 0);
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input_report_key(input, BTN_RIGHT, 0);
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input_report_key(input, BTN_MIDDLE, 0);
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input_report_abs(input, ABS_DISTANCE,
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input->absmax[ABS_DISTANCE]);
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} else {
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input_report_key(input, BTN_TOUCH, 0);
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input_report_key(input, BTN_STYLUS, 0);
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input_report_key(input, BTN_STYLUS2, 0);
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input_report_abs(input, ABS_PRESSURE, 0);
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}
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input_report_key(input, wdata->tool, 0);
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input_sync(input);
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}
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wdata->tool = tool;
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if (tool)
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input_report_key(input, tool, 1);
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}
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if (tool) {
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input_report_abs(input, ABS_X, x);
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input_report_abs(input, ABS_Y, y);
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switch ((data[1] >> 5) & 3) {
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case 2: /* Mouse with wheel */
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input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
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rw = (data[6] & 0x01) ? -1 :
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(data[6] & 0x02) ? 1 : 0;
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input_report_rel(input, REL_WHEEL, rw);
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/* fall through */
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case 3: /* Mouse without wheel */
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input_report_key(input, BTN_LEFT, data[1] & 0x01);
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input_report_key(input, BTN_RIGHT, data[1] & 0x02);
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/* Compute distance between mouse and tablet */
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rw = 44 - (data[6] >> 2);
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if (rw < 0)
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rw = 0;
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else if (rw > 31)
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rw = 31;
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input_report_abs(input, ABS_DISTANCE, rw);
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break;
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default:
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input_report_abs(input, ABS_PRESSURE,
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data[6] | (((__u16) (data[1] & 0x08)) << 5));
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input_report_key(input, BTN_TOUCH, data[1] & 0x01);
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input_report_key(input, BTN_STYLUS, data[1] & 0x02);
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input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);
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break;
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}
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input_sync(input);
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}
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/* Report the state of the two buttons at the top of the tablet
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* as two extra fingerpad keys (buttons 4 & 5). */
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rw = data[7] & 0x03;
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if (rw != wdata->butstate) {
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wdata->butstate = rw;
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input_report_key(input, BTN_0, rw & 0x02);
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input_report_key(input, BTN_1, rw & 0x01);
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input_report_key(input, BTN_TOOL_FINGER, 0xf0);
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input_event(input, EV_MSC, MSC_SERIAL, 0xf0);
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input_sync(input);
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}
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return 1;
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}
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static int wacom_probe(struct hid_device *hdev,
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const struct hid_device_id *id)
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{
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struct hid_input *hidinput;
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struct input_dev *input;
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struct wacom_data *wdata;
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char rep_data[2];
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int ret;
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int limit;
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wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
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if (wdata == NULL) {
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dev_err(&hdev->dev, "can't alloc wacom descriptor\n");
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return -ENOMEM;
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}
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hid_set_drvdata(hdev, wdata);
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/* Parse the HID report now */
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ret = hid_parse(hdev);
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if (ret) {
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dev_err(&hdev->dev, "parse failed\n");
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goto err_free;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret) {
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dev_err(&hdev->dev, "hw start failed\n");
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goto err_free;
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}
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/*
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* Note that if the raw queries fail, it's not a hard failure and it
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* is safe to continue
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*/
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/* Set Wacom mode2 */
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rep_data[0] = 0x03; rep_data[1] = 0x00;
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limit = 3;
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do {
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ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
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HID_FEATURE_REPORT);
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} while (ret < 0 && limit-- > 0);
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if (ret < 0)
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dev_warn(&hdev->dev, "failed to poke device #1, %d\n", ret);
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/* 0x06 - high reporting speed, 0x05 - low speed */
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rep_data[0] = 0x06; rep_data[1] = 0x00;
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limit = 3;
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do {
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ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
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HID_FEATURE_REPORT);
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} while (ret < 0 && limit-- > 0);
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if (ret < 0)
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dev_warn(&hdev->dev, "failed to poke device #2, %d\n", ret);
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hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
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input = hidinput->input;
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/* Basics */
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input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);
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input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) |
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BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE);
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input->relbit[0] |= BIT(REL_WHEEL);
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set_bit(BTN_TOOL_PEN, input->keybit);
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set_bit(BTN_TOUCH, input->keybit);
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set_bit(BTN_STYLUS, input->keybit);
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set_bit(BTN_STYLUS2, input->keybit);
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set_bit(BTN_LEFT, input->keybit);
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set_bit(BTN_RIGHT, input->keybit);
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set_bit(BTN_MIDDLE, input->keybit);
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/* Pad */
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input->evbit[0] |= BIT(EV_MSC);
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input->mscbit[0] |= BIT(MSC_SERIAL);
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set_bit(BTN_0, input->keybit);
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set_bit(BTN_1, input->keybit);
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set_bit(BTN_TOOL_FINGER, input->keybit);
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/* Distance, rubber and mouse */
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input->absbit[0] |= BIT(ABS_DISTANCE);
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set_bit(BTN_TOOL_RUBBER, input->keybit);
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set_bit(BTN_TOOL_MOUSE, input->keybit);
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input->absmax[ABS_PRESSURE] = 511;
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input->absmax[ABS_DISTANCE] = 32;
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input->absmax[ABS_X] = 16704;
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input->absmax[ABS_Y] = 12064;
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input->absfuzz[ABS_X] = 4;
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input->absfuzz[ABS_Y] = 4;
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return 0;
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err_free:
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kfree(wdata);
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return ret;
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}
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static void wacom_remove(struct hid_device *hdev)
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{
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hid_hw_stop(hdev);
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kfree(hid_get_drvdata(hdev));
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}
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static const struct hid_device_id wacom_devices[] = {
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, wacom_devices);
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static struct hid_driver wacom_driver = {
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.name = "wacom",
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.id_table = wacom_devices,
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.probe = wacom_probe,
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.remove = wacom_remove,
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.raw_event = wacom_raw_event,
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};
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static int __init wacom_init(void)
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{
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int ret;
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ret = hid_register_driver(&wacom_driver);
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if (ret)
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printk(KERN_ERR "can't register wacom driver\n");
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printk(KERN_ERR "wacom driver registered\n");
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return ret;
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}
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static void __exit wacom_exit(void)
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{
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hid_unregister_driver(&wacom_driver);
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}
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module_init(wacom_init);
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module_exit(wacom_exit);
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MODULE_LICENSE("GPL");
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