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linux/drivers/media/pci/cx25821/cx25821.h
Bhaktipriya Shridhar 072973ba67 [media] cx25821: Remove deprecated create_singlethread_workqueue 
The workqueue "_irq_audio_queues" runs the audio upstream handler.
It has a single work item(&dev->_audio_work_entry) and hence doesn't
require ordering. Also, it is not being used on a memory reclaim path.
Hence, the singlethreaded workqueue has been replaced with the use of
system_wq.

System workqueues have been able to handle high level of concurrency
for a long time now and hence it's not required to have a singlethreaded
workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue
created with create_singlethread_workqueue(), system_wq allows multiple
work items to overlap executions even on the same CPU; however, a
per-cpu workqueue doesn't have any CPU locality or global ordering
guarantee unless the target CPU is explicitly specified and thus the
increase of local concurrency shouldn't make any difference.

The work item has been flushed in cx25821_stop_upstream_audio() to ensure
that nothing is pending when the driver is disconnected.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-09-22 12:49:37 -03:00

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/*
* Driver for the Conexant CX25821 PCIe bridge
*
* Copyright (C) 2009 Conexant Systems Inc.
* Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
* Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef CX25821_H_
#define CX25821_H_
#include <linux/pci.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/kdev_t.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-sg.h>
#include "cx25821-reg.h"
#include "cx25821-medusa-reg.h"
#include "cx25821-sram.h"
#include "cx25821-audio.h"
#include <linux/version.h>
#include <linux/mutex.h>
#define CX25821_VERSION_CODE KERNEL_VERSION(0, 0, 106)
#define UNSET (-1U)
#define NO_SYNC_LINE (-1U)
#define CX25821_MAXBOARDS 2
#define LINE_SIZE_D1 1440
/* Number of decoders and encoders */
#define MAX_DECODERS 8
#define MAX_ENCODERS 2
#define QUAD_DECODERS 4
#define MAX_CAMERAS 16
/* Max number of inputs by card */
#define MAX_CX25821_INPUT 8
#define RESOURCE_VIDEO0 1
#define RESOURCE_VIDEO1 2
#define RESOURCE_VIDEO2 4
#define RESOURCE_VIDEO3 8
#define RESOURCE_VIDEO4 16
#define RESOURCE_VIDEO5 32
#define RESOURCE_VIDEO6 64
#define RESOURCE_VIDEO7 128
#define RESOURCE_VIDEO8 256
#define RESOURCE_VIDEO9 512
#define RESOURCE_VIDEO10 1024
#define RESOURCE_VIDEO11 2048
#define BUFFER_TIMEOUT (HZ) /* 0.5 seconds */
#define UNKNOWN_BOARD 0
#define CX25821_BOARD 1
/* Currently supported by the driver */
#define CX25821_NORMS (\
V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_JP | V4L2_STD_NTSC_M_KR | \
V4L2_STD_PAL_BG | V4L2_STD_PAL_DK | V4L2_STD_PAL_I | \
V4L2_STD_PAL_M | V4L2_STD_PAL_N | V4L2_STD_PAL_H | \
V4L2_STD_PAL_Nc)
#define CX25821_BOARD_CONEXANT_ATHENA10 1
#define MAX_VID_CHANNEL_NUM 12
/*
* Maximum capture-only channels. This can go away once video/audio output
* is fully supported in this driver.
*/
#define MAX_VID_CAP_CHANNEL_NUM 10
#define VID_CHANNEL_NUM 8
struct cx25821_fmt {
char *name;
u32 fourcc; /* v4l2 format id */
int depth;
int flags;
u32 cxformat;
};
struct cx25821_tvnorm {
char *name;
v4l2_std_id id;
u32 cxiformat;
u32 cxoformat;
};
enum cx25821_src_sel_type {
CX25821_SRC_SEL_EXT_656_VIDEO = 0,
CX25821_SRC_SEL_PARALLEL_MPEG_VIDEO
};
struct cx25821_riscmem {
unsigned int size;
__le32 *cpu;
__le32 *jmp;
dma_addr_t dma;
};
/* buffer for one video frame */
struct cx25821_buffer {
/* common v4l buffer stuff -- must be first */
struct vb2_v4l2_buffer vb;
struct list_head queue;
/* cx25821 specific */
unsigned int bpl;
struct cx25821_riscmem risc;
const struct cx25821_fmt *fmt;
};
enum port {
CX25821_UNDEFINED = 0,
CX25821_RAW,
CX25821_264
};
struct cx25821_board {
const char *name;
enum port porta;
enum port portb;
enum port portc;
u32 clk_freq;
};
struct cx25821_i2c {
struct cx25821_dev *dev;
int nr;
/* i2c i/o */
struct i2c_adapter i2c_adap;
struct i2c_client i2c_client;
u32 i2c_rc;
/* cx25821 registers used for raw addess */
u32 i2c_period;
u32 reg_ctrl;
u32 reg_stat;
u32 reg_addr;
u32 reg_rdata;
u32 reg_wdata;
};
struct cx25821_dmaqueue {
struct list_head active;
u32 count;
};
struct cx25821_dev;
struct cx25821_channel;
struct cx25821_video_out_data {
struct cx25821_channel *chan;
int _line_size;
int _prog_cnt;
int _pixel_format;
int _is_first_frame;
int _is_running;
int _file_status;
int _lines_count;
int _frame_count;
unsigned int _risc_size;
__le32 *_dma_virt_start_addr;
__le32 *_dma_virt_addr;
dma_addr_t _dma_phys_addr;
dma_addr_t _dma_phys_start_addr;
unsigned int _data_buf_size;
__le32 *_data_buf_virt_addr;
dma_addr_t _data_buf_phys_addr;
u32 upstream_riscbuf_size;
u32 upstream_databuf_size;
int is_60hz;
int _frame_index;
int cur_frame_index;
int curpos;
wait_queue_head_t waitq;
};
struct cx25821_channel {
unsigned id;
struct cx25821_dev *dev;
struct v4l2_ctrl_handler hdl;
struct video_device vdev;
struct cx25821_dmaqueue dma_vidq;
struct vb2_queue vidq;
const struct sram_channel *sram_channels;
const struct cx25821_fmt *fmt;
unsigned field;
unsigned int width, height;
int pixel_formats;
int use_cif_resolution;
int cif_width;
/* video output data for the video output channel */
struct cx25821_video_out_data *out;
};
struct snd_card;
struct cx25821_dev {
struct v4l2_device v4l2_dev;
/* pci stuff */
struct pci_dev *pci;
unsigned char pci_rev, pci_lat;
int pci_bus, pci_slot;
u32 base_io_addr;
u32 __iomem *lmmio;
u8 __iomem *bmmio;
int pci_irqmask;
int hwrevision;
/* used by cx25821-alsa */
struct snd_card *card;
u32 clk_freq;
/* I2C adapters: Master 1 & 2 (External) & Master 3 (Internal only) */
struct cx25821_i2c i2c_bus[3];
int nr;
struct mutex lock;
struct cx25821_channel channels[MAX_VID_CHANNEL_NUM];
/* board details */
unsigned int board;
char name[32];
/* Analog video */
unsigned int input;
v4l2_std_id tvnorm;
unsigned short _max_num_decoders;
/* Analog Audio Upstream */
int _audio_is_running;
int _audiopixel_format;
int _is_first_audio_frame;
int _audiofile_status;
int _audio_lines_count;
int _audioframe_count;
int _audio_upstream_channel;
int _last_index_irq; /* The last interrupt index processed. */
__le32 *_risc_audio_jmp_addr;
__le32 *_risc_virt_start_addr;
__le32 *_risc_virt_addr;
dma_addr_t _risc_phys_addr;
dma_addr_t _risc_phys_start_addr;
unsigned int _audiorisc_size;
unsigned int _audiodata_buf_size;
__le32 *_audiodata_buf_virt_addr;
dma_addr_t _audiodata_buf_phys_addr;
char *_audiofilename;
u32 audio_upstream_riscbuf_size;
u32 audio_upstream_databuf_size;
int _audioframe_index;
struct work_struct _audio_work_entry;
char *input_audiofilename;
/* V4l */
spinlock_t slock;
/* Video Upstream */
struct cx25821_video_out_data vid_out_data[2];
};
static inline struct cx25821_dev *get_cx25821(struct v4l2_device *v4l2_dev)
{
return container_of(v4l2_dev, struct cx25821_dev, v4l2_dev);
}
extern struct cx25821_board cx25821_boards[];
#define SRAM_CH00 0 /* Video A */
#define SRAM_CH01 1 /* Video B */
#define SRAM_CH02 2 /* Video C */
#define SRAM_CH03 3 /* Video D */
#define SRAM_CH04 4 /* Video E */
#define SRAM_CH05 5 /* Video F */
#define SRAM_CH06 6 /* Video G */
#define SRAM_CH07 7 /* Video H */
#define SRAM_CH08 8 /* Audio A */
#define SRAM_CH09 9 /* Video Upstream I */
#define SRAM_CH10 10 /* Video Upstream J */
#define SRAM_CH11 11 /* Audio Upstream AUD_CHANNEL_B */
#define VID_UPSTREAM_SRAM_CHANNEL_I SRAM_CH09
#define VID_UPSTREAM_SRAM_CHANNEL_J SRAM_CH10
#define AUDIO_UPSTREAM_SRAM_CHANNEL_B SRAM_CH11
struct sram_channel {
char *name;
u32 i;
u32 cmds_start;
u32 ctrl_start;
u32 cdt;
u32 fifo_start;
u32 fifo_size;
u32 ptr1_reg;
u32 ptr2_reg;
u32 cnt1_reg;
u32 cnt2_reg;
u32 int_msk;
u32 int_stat;
u32 int_mstat;
u32 dma_ctl;
u32 gpcnt_ctl;
u32 gpcnt;
u32 aud_length;
u32 aud_cfg;
u32 fld_aud_fifo_en;
u32 fld_aud_risc_en;
/* For Upstream Video */
u32 vid_fmt_ctl;
u32 vid_active_ctl1;
u32 vid_active_ctl2;
u32 vid_cdt_size;
u32 vip_ctl;
u32 pix_frmt;
u32 jumponly;
u32 irq_bit;
};
extern const struct sram_channel cx25821_sram_channels[];
#define cx_read(reg) readl(dev->lmmio + ((reg)>>2))
#define cx_write(reg, value) writel((value), dev->lmmio + ((reg)>>2))
#define cx_andor(reg, mask, value) \
writel((readl(dev->lmmio+((reg)>>2)) & ~(mask)) |\
((value) & (mask)), dev->lmmio+((reg)>>2))
#define cx_set(reg, bit) cx_andor((reg), (bit), (bit))
#define cx_clear(reg, bit) cx_andor((reg), (bit), 0)
#define Set_GPIO_Bit(Bit) (1 << Bit)
#define Clear_GPIO_Bit(Bit) (~(1 << Bit))
#define CX25821_ERR(fmt, args...) \
pr_err("(%d): " fmt, dev->board, ##args)
#define CX25821_WARN(fmt, args...) \
pr_warn("(%d): " fmt, dev->board, ##args)
#define CX25821_INFO(fmt, args...) \
pr_info("(%d): " fmt, dev->board, ##args)
extern int cx25821_i2c_register(struct cx25821_i2c *bus);
extern int cx25821_i2c_read(struct cx25821_i2c *bus, u16 reg_addr, int *value);
extern int cx25821_i2c_write(struct cx25821_i2c *bus, u16 reg_addr, int value);
extern int cx25821_i2c_unregister(struct cx25821_i2c *bus);
extern void cx25821_gpio_init(struct cx25821_dev *dev);
extern void cx25821_set_gpiopin_direction(struct cx25821_dev *dev,
int pin_number, int pin_logic_value);
extern int medusa_video_init(struct cx25821_dev *dev);
extern int medusa_set_videostandard(struct cx25821_dev *dev);
extern void medusa_set_resolution(struct cx25821_dev *dev, int width,
int decoder_select);
extern int medusa_set_brightness(struct cx25821_dev *dev, int brightness,
int decoder);
extern int medusa_set_contrast(struct cx25821_dev *dev, int contrast,
int decoder);
extern int medusa_set_hue(struct cx25821_dev *dev, int hue, int decoder);
extern int medusa_set_saturation(struct cx25821_dev *dev, int saturation,
int decoder);
extern int cx25821_sram_channel_setup(struct cx25821_dev *dev,
const struct sram_channel *ch, unsigned int bpl,
u32 risc);
extern int cx25821_riscmem_alloc(struct pci_dev *pci,
struct cx25821_riscmem *risc,
unsigned int size);
extern int cx25821_risc_buffer(struct pci_dev *pci, struct cx25821_riscmem *risc,
struct scatterlist *sglist,
unsigned int top_offset,
unsigned int bottom_offset,
unsigned int bpl,
unsigned int padding, unsigned int lines);
extern int cx25821_risc_databuffer_audio(struct pci_dev *pci,
struct cx25821_riscmem *risc,
struct scatterlist *sglist,
unsigned int bpl,
unsigned int lines, unsigned int lpi);
extern void cx25821_free_buffer(struct cx25821_dev *dev,
struct cx25821_buffer *buf);
extern void cx25821_sram_channel_dump(struct cx25821_dev *dev,
const struct sram_channel *ch);
extern void cx25821_sram_channel_dump_audio(struct cx25821_dev *dev,
const struct sram_channel *ch);
extern struct cx25821_dev *cx25821_dev_get(struct pci_dev *pci);
extern void cx25821_print_irqbits(char *name, char *tag, char **strings,
int len, u32 bits, u32 mask);
extern void cx25821_dev_unregister(struct cx25821_dev *dev);
extern int cx25821_sram_channel_setup_audio(struct cx25821_dev *dev,
const struct sram_channel *ch,
unsigned int bpl, u32 risc);
extern int cx25821_vidupstream_init(struct cx25821_channel *chan, int pixel_format);
extern int cx25821_audio_upstream_init(struct cx25821_dev *dev,
int channel_select);
extern int cx25821_write_frame(struct cx25821_channel *chan,
const char __user *data, size_t count);
extern void cx25821_free_mem_upstream(struct cx25821_channel *chan);
extern void cx25821_free_mem_upstream_audio(struct cx25821_dev *dev);
extern void cx25821_stop_upstream_video(struct cx25821_channel *chan);
extern void cx25821_stop_upstream_audio(struct cx25821_dev *dev);
extern int cx25821_sram_channel_setup_upstream(struct cx25821_dev *dev,
const struct sram_channel *ch,
unsigned int bpl, u32 risc);
extern void cx25821_set_pixel_format(struct cx25821_dev *dev, int channel,
u32 format);
#endif
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