![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>
479 lines
11 KiB
C
479 lines
11 KiB
C
/*
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***************************************************************************
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*
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* radio-gemtek-pci.c - Gemtek PCI Radio driver
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* (C) 2001 Vladimir Shebordaev <vshebordaev@mail.ru>
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*
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***************************************************************************
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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* USA.
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*
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***************************************************************************
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*
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* Gemtek Corp still silently refuses to release any specifications
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* of their multimedia devices, so the protocol still has to be
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* reverse engineered.
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*
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* The v4l code was inspired by Jonas Munsin's Gemtek serial line
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* radio device driver.
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*
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* Please, let me know if this piece of code was useful :)
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*
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* TODO: multiple device support and portability were not tested
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*
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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*
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***************************************************************************
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*/
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/videodev2.h>
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#include <linux/errno.h>
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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MODULE_AUTHOR("Vladimir Shebordaev <vshebordaev@mail.ru>");
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MODULE_DESCRIPTION("The video4linux driver for the Gemtek PCI Radio Card");
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MODULE_LICENSE("GPL");
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static int nr_radio = -1;
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static int mx = 1;
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module_param(mx, bool, 0);
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MODULE_PARM_DESC(mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not");
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module_param(nr_radio, int, 0);
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MODULE_PARM_DESC(nr_radio, "video4linux device number to use");
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#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
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#ifndef PCI_VENDOR_ID_GEMTEK
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#define PCI_VENDOR_ID_GEMTEK 0x5046
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#endif
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#ifndef PCI_DEVICE_ID_GEMTEK_PR103
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#define PCI_DEVICE_ID_GEMTEK_PR103 0x1001
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#endif
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#ifndef GEMTEK_PCI_RANGE_LOW
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#define GEMTEK_PCI_RANGE_LOW (87*16000)
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#endif
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#ifndef GEMTEK_PCI_RANGE_HIGH
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#define GEMTEK_PCI_RANGE_HIGH (108*16000)
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#endif
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struct gemtek_pci {
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struct v4l2_device v4l2_dev;
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struct video_device vdev;
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struct mutex lock;
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struct pci_dev *pdev;
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u32 iobase;
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u32 length;
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u32 current_frequency;
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u8 mute;
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};
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static inline struct gemtek_pci *to_gemtek_pci(struct v4l2_device *v4l2_dev)
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{
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return container_of(v4l2_dev, struct gemtek_pci, v4l2_dev);
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}
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static inline u8 gemtek_pci_out(u16 value, u32 port)
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{
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outw(value, port);
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return (u8)value;
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}
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#define _b0(v) (*((u8 *)&v))
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static void __gemtek_pci_cmd(u16 value, u32 port, u8 *last_byte, int keep)
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{
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u8 byte = *last_byte;
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if (!value) {
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if (!keep)
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value = (u16)port;
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byte &= 0xfd;
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} else
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byte |= 2;
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_b0(value) = byte;
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outw(value, port);
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byte |= 1;
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_b0(value) = byte;
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outw(value, port);
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byte &= 0xfe;
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_b0(value) = byte;
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outw(value, port);
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*last_byte = byte;
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}
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static inline void gemtek_pci_nil(u32 port, u8 *last_byte)
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{
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__gemtek_pci_cmd(0x00, port, last_byte, false);
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}
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static inline void gemtek_pci_cmd(u16 cmd, u32 port, u8 *last_byte)
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{
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__gemtek_pci_cmd(cmd, port, last_byte, true);
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}
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static void gemtek_pci_setfrequency(struct gemtek_pci *card, unsigned long frequency)
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{
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int i;
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u32 value = frequency / 200 + 856;
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u16 mask = 0x8000;
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u8 last_byte;
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u32 port = card->iobase;
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mutex_lock(&card->lock);
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card->current_frequency = frequency;
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last_byte = gemtek_pci_out(0x06, port);
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i = 0;
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do {
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gemtek_pci_nil(port, &last_byte);
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i++;
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} while (i < 9);
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i = 0;
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do {
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gemtek_pci_cmd(value & mask, port, &last_byte);
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mask >>= 1;
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i++;
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} while (i < 16);
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outw(0x10, port);
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mutex_unlock(&card->lock);
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}
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static void gemtek_pci_mute(struct gemtek_pci *card)
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{
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mutex_lock(&card->lock);
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outb(0x1f, card->iobase);
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card->mute = true;
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mutex_unlock(&card->lock);
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}
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static void gemtek_pci_unmute(struct gemtek_pci *card)
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{
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if (card->mute) {
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gemtek_pci_setfrequency(card, card->current_frequency);
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card->mute = false;
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}
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}
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static int gemtek_pci_getsignal(struct gemtek_pci *card)
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{
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int sig;
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mutex_lock(&card->lock);
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sig = (inb(card->iobase) & 0x08) ? 0 : 1;
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mutex_unlock(&card->lock);
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return sig;
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}
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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struct gemtek_pci *card = video_drvdata(file);
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strlcpy(v->driver, "radio-gemtek-pci", sizeof(v->driver));
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strlcpy(v->card, "GemTek PCI Radio", sizeof(v->card));
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snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(card->pdev));
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v->version = RADIO_VERSION;
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v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct gemtek_pci *card = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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strlcpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = GEMTEK_PCI_RANGE_LOW;
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v->rangehigh = GEMTEK_PCI_RANGE_HIGH;
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v->rxsubchans = V4L2_TUNER_SUB_MONO;
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v->capability = V4L2_TUNER_CAP_LOW;
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v->audmode = V4L2_TUNER_MODE_MONO;
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v->signal = 0xffff * gemtek_pci_getsignal(card);
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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return v->index ? -EINVAL : 0;
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}
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static int vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct gemtek_pci *card = video_drvdata(file);
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if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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return -EINVAL;
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if (f->frequency < GEMTEK_PCI_RANGE_LOW ||
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f->frequency > GEMTEK_PCI_RANGE_HIGH)
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return -EINVAL;
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gemtek_pci_setfrequency(card, f->frequency);
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card->mute = false;
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return 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct gemtek_pci *card = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = card->current_frequency;
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return 0;
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}
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static int vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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switch (qc->id) {
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case V4L2_CID_AUDIO_MUTE:
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
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case V4L2_CID_AUDIO_VOLUME:
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return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
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}
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return -EINVAL;
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}
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static int vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct gemtek_pci *card = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value = card->mute;
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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if (card->mute)
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ctrl->value = 0;
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else
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ctrl->value = 65535;
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct gemtek_pci *card = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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if (ctrl->value)
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gemtek_pci_mute(card);
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else
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gemtek_pci_unmute(card);
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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if (ctrl->value)
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gemtek_pci_unmute(card);
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else
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gemtek_pci_mute(card);
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
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{
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return i ? -EINVAL : 0;
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}
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static int vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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a->index = 0;
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strlcpy(a->name, "Radio", sizeof(a->name));
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a->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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return a->index ? -EINVAL : 0;
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}
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enum {
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GEMTEK_PR103
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};
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static char *card_names[] __devinitdata = {
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"GEMTEK_PR103"
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};
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static struct pci_device_id gemtek_pci_id[] =
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{
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{ PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 },
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{ 0 }
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};
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MODULE_DEVICE_TABLE(pci, gemtek_pci_id);
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static const struct v4l2_file_operations gemtek_pci_fops = {
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.owner = THIS_MODULE,
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.ioctl = video_ioctl2,
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};
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static const struct v4l2_ioctl_ops gemtek_pci_ioctl_ops = {
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.vidioc_querycap = vidioc_querycap,
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.vidioc_g_tuner = vidioc_g_tuner,
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.vidioc_s_tuner = vidioc_s_tuner,
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.vidioc_g_audio = vidioc_g_audio,
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.vidioc_s_audio = vidioc_s_audio,
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.vidioc_g_input = vidioc_g_input,
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.vidioc_s_input = vidioc_s_input,
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.vidioc_g_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_queryctrl = vidioc_queryctrl,
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.vidioc_g_ctrl = vidioc_g_ctrl,
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.vidioc_s_ctrl = vidioc_s_ctrl,
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};
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static int __devinit gemtek_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
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{
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struct gemtek_pci *card;
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struct v4l2_device *v4l2_dev;
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int res;
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card = kzalloc(sizeof(struct gemtek_pci), GFP_KERNEL);
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if (card == NULL) {
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dev_err(&pdev->dev, "out of memory\n");
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return -ENOMEM;
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}
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v4l2_dev = &card->v4l2_dev;
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mutex_init(&card->lock);
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card->pdev = pdev;
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strlcpy(v4l2_dev->name, "gemtek_pci", sizeof(v4l2_dev->name));
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res = v4l2_device_register(&pdev->dev, v4l2_dev);
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if (res < 0) {
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v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
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kfree(card);
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return res;
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}
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if (pci_enable_device(pdev))
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goto err_pci;
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card->iobase = pci_resource_start(pdev, 0);
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card->length = pci_resource_len(pdev, 0);
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if (request_region(card->iobase, card->length, card_names[pci_id->driver_data]) == NULL) {
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v4l2_err(v4l2_dev, "i/o port already in use\n");
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goto err_pci;
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}
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strlcpy(card->vdev.name, v4l2_dev->name, sizeof(card->vdev.name));
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card->vdev.v4l2_dev = v4l2_dev;
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card->vdev.fops = &gemtek_pci_fops;
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card->vdev.ioctl_ops = &gemtek_pci_ioctl_ops;
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card->vdev.release = video_device_release_empty;
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video_set_drvdata(&card->vdev, card);
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if (video_register_device(&card->vdev, VFL_TYPE_RADIO, nr_radio) < 0)
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goto err_video;
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gemtek_pci_mute(card);
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v4l2_info(v4l2_dev, "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n",
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pdev->revision, card->iobase, card->iobase + card->length - 1);
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return 0;
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err_video:
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release_region(card->iobase, card->length);
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err_pci:
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v4l2_device_unregister(v4l2_dev);
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kfree(card);
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return -ENODEV;
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}
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static void __devexit gemtek_pci_remove(struct pci_dev *pdev)
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{
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struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
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struct gemtek_pci *card = to_gemtek_pci(v4l2_dev);
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video_unregister_device(&card->vdev);
|
|
v4l2_device_unregister(v4l2_dev);
|
|
|
|
release_region(card->iobase, card->length);
|
|
|
|
if (mx)
|
|
gemtek_pci_mute(card);
|
|
|
|
kfree(card);
|
|
}
|
|
|
|
static struct pci_driver gemtek_pci_driver = {
|
|
.name = "gemtek_pci",
|
|
.id_table = gemtek_pci_id,
|
|
.probe = gemtek_pci_probe,
|
|
.remove = __devexit_p(gemtek_pci_remove),
|
|
};
|
|
|
|
static int __init gemtek_pci_init(void)
|
|
{
|
|
return pci_register_driver(&gemtek_pci_driver);
|
|
}
|
|
|
|
static void __exit gemtek_pci_exit(void)
|
|
{
|
|
pci_unregister_driver(&gemtek_pci_driver);
|
|
}
|
|
|
|
module_init(gemtek_pci_init);
|
|
module_exit(gemtek_pci_exit);
|