/*
* Colour AR M64278(VGA) driver for Video4Linux
*
* Copyright (C) 2003 Takeo Takahashi <takahashi.takeo@renesas.com>
*
* 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.
*
* Some code is taken from AR driver sample program for M3T-M32700UT.
*
* AR driver sample (M32R SDK):
* Copyright (c) 2003 RENESAS TECHNOROGY CORPORATION
* AND RENESAS SOLUTIONS CORPORATION
* All Rights Reserved.
*
* 2003-09-01: Support w3cam by Takeo Takahashi
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <asm/m32r.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#if 0
#define DEBUG(n, args...) printk(KERN_INFO args)
#define CHECK_LOST 1
#else
#define DEBUG(n, args...)
#define CHECK_LOST 0
#endif
/*
* USE_INT is always 0, interrupt mode is not available
* on linux due to lack of speed
*/
#define USE_INT 0 /* Don't modify */
#define VERSION "0.04"
#define ar_inl(addr) inl((unsigned long)(addr))
#define ar_outl(val, addr) outl((unsigned long)(val), (unsigned long)(addr))
extern struct cpuinfo_m32r boot_cpu_data;
/*
* CCD pixel size
* Note that M32700UT does not support CIF mode, but QVGA is
* supported by M32700UT hardware using VGA mode of AR LSI.
*
* Supported: VGA (Normal mode, Interlace mode)
* QVGA (Always Interlace mode of VGA)
*
*/
#define AR_WIDTH_VGA 640
#define AR_HEIGHT_VGA 480
#define AR_WIDTH_QVGA 320
#define AR_HEIGHT_QVGA 240
#define MIN_AR_WIDTH AR_WIDTH_QVGA
#define MIN_AR_HEIGHT AR_HEIGHT_QVGA
#define MAX_AR_WIDTH AR_WIDTH_VGA
#define MAX_AR_HEIGHT AR_HEIGHT_VGA
/* bits & bytes per pixel */
#define AR_BITS_PER_PIXEL 16
#define AR_BYTES_PER_PIXEL (AR_BITS_PER_PIXEL / 8)
/* line buffer size */
#define AR_LINE_BYTES_VGA (AR_WIDTH_VGA * AR_BYTES_PER_PIXEL)
#define AR_LINE_BYTES_QVGA (AR_WIDTH_QVGA * AR_BYTES_PER_PIXEL)
#define MAX_AR_LINE_BYTES AR_LINE_BYTES_VGA
/* frame size & type */
#define AR_FRAME_BYTES_VGA \
(AR_WIDTH_VGA * AR_HEIGHT_VGA * AR_BYTES_PER_PIXEL)
#define AR_FRAME_BYTES_QVGA \
(AR_WIDTH_QVGA * AR_HEIGHT_QVGA * AR_BYTES_PER_PIXEL)
#define MAX_AR_FRAME_BYTES \
(MAX_AR_WIDTH * MAX_AR_HEIGHT * AR_BYTES_PER_PIXEL)
#define AR_MAX_FRAME 15
/* capture size */
#define AR_SIZE_VGA 0
#define AR_SIZE_QVGA 1
/* capture mode */
#define AR_MODE_INTERLACE 0
#define AR_MODE_NORMAL 1
struct ar {
struct v4l2_device v4l2_dev;
struct video_device vdev;
unsigned int start_capture; /* duaring capture in INT. mode. */
#if USE_INT
unsigned char *line_buff; /* DMA line buffer */
#endif
unsigned char *frame[MAX_AR_HEIGHT]; /* frame data */
short size; /* capture size */
short mode; /* capture mode */
int width, height;
int frame_bytes, line_bytes;
wait_queue_head_t wait;
struct mutex lock;
};
static struct ar ardev;
static int video_nr = -1; /* video device number (first free) */
static unsigned char yuv[MAX_AR_FRAME_BYTES];
/* module parameters */
/* default frequency */
#define DEFAULT_FREQ 50 /* 50 or 75 (MHz) is available as BCLK */
static int freq = DEFAULT_FREQ; /* BCLK: available 50 or 70 (MHz) */
static int vga; /* default mode(0:QVGA mode, other:VGA mode) */
static int vga_interlace; /* 0 is normal mode for, else interlace mode */
module_param(freq, int, 0);
module_param(vga, int, 0);
module_param(vga_interlace, int, 0);
static void wait_for_vsync(void)
{
while (ar_inl(ARVCR0) & ARVCR0_VDS) /* wait for VSYNC */
cpu_relax();
while (!(ar_inl(ARVCR0) & ARVCR0_VDS)) /* wait for VSYNC */
cpu_relax();
}
static void wait_acknowledge(void)
{
int i;
for (i = 0; i < 1000; i++)
cpu_relax();
while (ar_inl(PLDI2CSTS) & PLDI2CSTS_NOACK)
cpu_relax();
}
/*******************************************************************
* I2C functions
*******************************************************************/
static void iic(int n, unsigned long addr, unsigned long data1, unsigned long data2,
unsigned long data3)
{
int i;
/* Slave Address */
ar_outl(addr, PLDI2CDATA);
wait_for_vsync();
/* Start */
ar_outl(1, PLDI2CCND);
wait_acknowledge();
/* Transfer data 1 */
ar_outl(data1, PLDI2CDATA);
wait_for_vsync();
ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
wait_acknowledge();
/* Transfer data 2 */
ar_outl(data2, PLDI2CDATA);
wait_for_vsync();
ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
wait_acknowledge();
if (n == 3) {
/* Transfer data 3 */
ar_outl(data3, PLDI2CDATA);
wait_for_vsync();
ar_outl(PLDI2CSTEN_STEN, PLDI2CSTEN);
wait_acknowledge();
}
/* Stop */
for (i = 0; i < 100; i++)
cpu_relax();
ar_outl(2, PLDI2CCND);
ar_outl(2, PLDI2CCND);
while (ar_inl(PLDI2CSTS) & PLDI2CSTS_BB)
cpu_relax();
}
static void init_iic(void)
{
DEBUG(1, "init_iic:\n");
/*
* ICU Setting (iic)
*/
/* I2C Setting */
ar_outl(0x0, PLDI2CCR); /* I2CCR Disable */
ar_outl(0x0300, PLDI2CMOD); /* I2CMOD ACK/8b-data/7b-addr/auto */
ar_outl(0x1, PLDI2CACK); /* I2CACK ACK */
/* I2C CLK */
/* 50MH-100k */
if (freq == 75)
ar_outl(369, PLDI2CFREQ); /* BCLK = 75MHz */
else if (freq == 50)
ar_outl(244, PLDI2CFREQ); /* BCLK = 50MHz */
else
ar_outl(244, PLDI2CFREQ); /* default: BCLK = 50MHz */
ar_outl(0x1, PLDI2CCR); /* I2CCR Enable */
}
/**************************************************************************
*
* Video4Linux Interface functions
*
**************************************************************************/
static inline void disable_dma(void)
{
ar_outl(0x8000, M32R_DMAEN_PORTL); /* disable DMA0 */
}
static inline void enable_dma(void)
{
ar_outl(0x8080, M32R_DMAEN_PORTL); /* enable DMA0 */
}
static inline void clear_dma_status(void)
{
ar_outl(0x8000, M32R_DMAEDET_PORTL); /* clear status */
}
static void wait_for_vertical_sync(struct ar *ar, int exp_line)
{
#if CHECK_LOST
int tmout = 10000; /* FIXME */
int l;
/*
* check HCOUNT because we cannot check vertical sync.
*/
for (; tmout >= 0; tmout--) {
l = ar_inl(ARVHCOUNT);
if (l == exp_line)
break;
}
if (tmout < 0)
v4l2_err(&ar->v4l2_dev, "lost %d -> %d\n", exp_line, l);
#else
while (ar_inl(ARVHCOUNT) != exp_line)
cpu_relax();
#endif
}
static ssize_t ar_read(struct file *file, char *buf, size_t count, loff_t *ppos)
{
struct ar *ar = video_drvdata(file);
long ret = ar->frame_bytes; /* return read bytes */
unsigned long arvcr1 = 0;
unsigned long flags;
unsigned char *p;
int h, w;
unsigned char *py, *pu, *pv;
#if !USE_INT
int l;
#endif
DEBUG(1, "ar_read()\n");
if (ar->size == AR_SIZE_QVGA)
arvcr1 |= ARVCR1_QVGA;
if (ar->mode == AR_MODE_NORMAL)
arvcr1 |= ARVCR1_NORMAL;
mutex_lock(&ar->lock);
#if USE_INT
local_irq_save(flags);
disable_dma();
ar_outl(0xa1871300, M32R_DMA0CR0_PORTL);
ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
/* set AR FIFO address as source(BSEL5) */
ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* destination addr. */
ar_outl(ar->line_buff, M32R_DMA0RDA_PORTL); /* reload address */
ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL); /* byte count (bytes) */
ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL); /* reload count (bytes) */
/*
* Okay, kick AR LSI to invoke an interrupt
*/
ar->start_capture = 0;
ar_outl(arvcr1 | ARVCR1_HIEN, ARVCR1);
local_irq_restore(flags);
/* .... AR interrupts .... */
interruptible_sleep_on(&ar->wait);
if (signal_pending(current)) {
printk(KERN_ERR "arv: interrupted while get frame data.\n");
ret = -EINTR;
goto out_up;
}
#else /* ! USE_INT */
/* polling */
ar_outl(arvcr1, ARVCR1);
disable_dma();
ar_outl(0x8000, M32R_DMAEDET_PORTL);
ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
ar_outl(0x01000000, M32R_DMA0CR1_PORTL);
ar_outl(ARDATA32, M32R_DMA0CSA_PORTL);
ar_outl(ARDATA32, M32R_DMA0RSA_PORTL);
ar_outl(ar->line_bytes, M32R_DMA0CBCUT_PORTL);
ar_outl(ar->line_bytes, M32R_DMA0RBCUT_PORTL);
local_irq_save(flags);
while (ar_inl(ARVHCOUNT) != 0) /* wait for 0 */
cpu_relax();
if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
for (h = 0; h < ar->height; h++) {
wait_for_vertical_sync(ar, h);
if (h < (AR_HEIGHT_VGA/2))
l = h << 1;
else
l = (((h - (AR_HEIGHT_VGA/2)) << 1) + 1);
ar_outl(virt_to_phys(ar->frame[l]), M32R_DMA0CDA_PORTL);
enable_dma();
while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
cpu_relax();
disable_dma();
clear_dma_status();
ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
}
} else {
for (h = 0; h < ar->height; h++) {
wait_for_vertical_sync(ar, h);
ar_outl(virt_to_phys(ar->frame[h]), M32R_DMA0CDA_PORTL);
enable_dma();
while (!(ar_inl(M32R_DMAEDET_PORTL) & 0x8000))
cpu_relax();
disable_dma();
clear_dma_status();
ar_outl(0xa0861300, M32R_DMA0CR0_PORTL);
}
}
local_irq_restore(flags);
#endif /* ! USE_INT */
/*
* convert YUV422 to YUV422P
* +--------------------+
* | Y0,Y1,... |
* | ..............Yn |
* +--------------------+
* | U0,U1,........Un |
* +--------------------+
* | V0,V1,........Vn |
* +--------------------+
*/
py = yuv;
pu = py + (ar->frame_bytes / 2);
pv = pu + (ar->frame_bytes / 4);
for (h = 0; h < ar->height; h++) {
p = ar->frame[h];
for (w = 0; w < ar->line_bytes; w += 4) {
*py++ = *p++;
*pu++ = *p++;
*py++ = *p++;
*pv++ = *p++;
}
}
if (copy_to_user(buf, yuv, ar->frame_bytes)) {
v4l2_err(&ar->v4l2_dev, "failed while copy_to_user yuv.\n");
ret = -EFAULT;
goto out_up;
}
DEBUG(1, "ret = %d\n", ret);
out_up:
mutex_unlock(&ar->lock);
return ret;
}
static int ar_querycap(struct file *file, void *priv,
struct v4l2_capability *vcap)
{
struct ar *ar = video_drvdata(file);
strlcpy(vcap->driver, ar->vdev.name, sizeof(vcap->driver));
strlcpy(vcap->card, "Colour AR VGA", sizeof(vcap->card));
strlcpy(vcap->bus_info, "Platform", sizeof(vcap->bus_info));
vcap->version = KERNEL_VERSION(0, 0, 4);
vcap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
return 0;
}
static int ar_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
{
if (vin->index > 0)
return -EINVAL;
strlcpy(vin->name, "Camera", sizeof(vin->name));
vin->type = V4L2_INPUT_TYPE_CAMERA;
vin->audioset = 0;
vin->tuner = 0;
vin->std = V4L2_STD_ALL;
vin->status = 0;
return 0;
}
static int ar_g_input(struct file *file, void *fh, unsigned int *inp)
{
*inp = 0;
return 0;
}
static int ar_s_input(struct file *file, void *fh, unsigned int inp)
{
return inp ? -EINVAL : 0;
}
static int ar_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct ar *ar = video_drvdata(file);
struct v4l2_pix_format *pix = &fmt->fmt.pix;
pix->width = ar->width;
pix->height = ar->height;
pix->pixelformat = V4L2_PIX_FMT_YUV422P;
pix->field = (ar->mode == AR_MODE_NORMAL) ? V4L2_FIELD_NONE : V4L2_FIELD_INTERLACED;
pix->bytesperline = ar->width;
pix->sizeimage = 2 * ar->width * ar->height;
/* Just a guess */
pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
static int ar_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct ar *ar = video_drvdata(file);
struct v4l2_pix_format *pix = &fmt->fmt.pix;
if (pix->height <= AR_HEIGHT_QVGA || pix->width <= AR_WIDTH_QVGA) {
pix->height = AR_HEIGHT_QVGA;
pix->width = AR_WIDTH_QVGA;
pix->field = V4L2_FIELD_INTERLACED;
} else {
pix->height = AR_HEIGHT_VGA;
pix->width = AR_WIDTH_VGA;
pix->field = vga_interlace ? V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE;
}
pix->pixelformat = V4L2_PIX_FMT_YUV422P;
pix->bytesperline = ar->width;
pix->sizeimage = 2 * ar->width * ar->height;
/* Just a guess */
pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
static int ar_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct ar *ar = video_drvdata(file);
struct v4l2_pix_format *pix = &fmt->fmt.pix;
int ret = ar_try_fmt_vid_cap(file, fh, fmt);
if (ret)
return ret;
mutex_lock(&ar->lock);
ar->width = pix->width;
ar->height = pix->height;
if (ar->width == AR_WIDTH_VGA) {
ar->size = AR_SIZE_VGA;
ar->frame_bytes = AR_FRAME_BYTES_VGA;
ar->line_bytes = AR_LINE_BYTES_VGA;
if (vga_interlace)
ar->mode = AR_MODE_INTERLACE;
else
ar->mode = AR_MODE_NORMAL;
} else {
ar->size = AR_SIZE_QVGA;
ar->frame_bytes = AR_FRAME_BYTES_QVGA;
ar->line_bytes = AR_LINE_BYTES_QVGA;
ar->mode = AR_MODE_INTERLACE;
}
/* Ok we figured out what to use from our wide choice */
mutex_unlock(&ar->lock);
return 0;
}
static int ar_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
{
static struct v4l2_fmtdesc formats[] = {
{ 0, 0, 0,
"YUV 4:2:2 Planar", V4L2_PIX_FMT_YUV422P,
{ 0, 0, 0, 0 }
},
};
enum v4l2_buf_type type = fmt->type;
if (fmt->index > 0)
return -EINVAL;
*fmt = formats[fmt->index];
fmt->type = type;
return 0;
}
#if USE_INT
/*
* Interrupt handler
*/
static void ar_interrupt(int irq, void *dev)
{
struct ar *ar = dev;
unsigned int line_count;
unsigned int line_number;
unsigned int arvcr1;
line_count = ar_inl(ARVHCOUNT); /* line number */
if (ar->mode == AR_MODE_INTERLACE && ar->size == AR_SIZE_VGA) {
/* operations for interlace mode */
if (line_count < (AR_HEIGHT_VGA / 2)) /* even line */
line_number = (line_count << 1);
else /* odd line */
line_number =
(((line_count - (AR_HEIGHT_VGA / 2)) << 1) + 1);
} else {
line_number = line_count;
}
if (line_number == 0) {
/*
* It is an interrupt for line 0.
* we have to start capture.
*/
disable_dma();
#if 0
ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL); /* needless? */
#endif
memcpy(ar->frame[0], ar->line_buff, ar->line_bytes);
#if 0
ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
#endif
enable_dma();
ar->start_capture = 1; /* during capture */
return;
}
if (ar->start_capture == 1 && line_number <= (ar->height - 1)) {
disable_dma();
memcpy(ar->frame[line_number], ar->line_buff, ar->line_bytes);
/*
* if captured all line of a frame, disable AR interrupt
* and wake a process up.
*/
if (line_number == (ar->height - 1)) { /* end of line */
ar->start_capture = 0;
/* disable AR interrupt request */
arvcr1 = ar_inl(ARVCR1);
arvcr1 &= ~ARVCR1_HIEN; /* clear int. flag */
ar_outl(arvcr1, ARVCR1); /* disable */
wake_up_interruptible(&ar->wait);
} else {
#if 0
ar_outl(ar->line_buff, M32R_DMA0CDA_PORTL);
ar_outl(0xa1861300, M32R_DMA0CR0_PORTL);
#endif
enable_dma();
}
}
}
#endif
/*
* ar_initialize()
* ar_initialize() is called by video_register_device() and
* initializes AR LSI and peripherals.
*
* -1 is returned in all failures.
* 0 is returned in success.
*
*/
static int ar_initialize(struct ar *ar)
{
unsigned long cr = 0;
int i, found = 0;
DEBUG(1, "ar_initialize:\n");
/*
* initialize AR LSI
*/
ar_outl(0, ARVCR0); /* assert reset of AR LSI */
for (i = 0; i < 0x18; i++) /* wait for over 10 cycles @ 27MHz */
cpu_relax();
ar_outl(ARVCR0_RST, ARVCR0); /* negate reset of AR LSI (enable) */
for (i = 0; i < 0x40d; i++) /* wait for over 420 cycles @ 27MHz */
cpu_relax();
/* AR uses INT3 of CPU as interrupt pin. */
ar_outl(ARINTSEL_INT3, ARINTSEL);
if (ar->size == AR_SIZE_QVGA)
cr |= ARVCR1_QVGA;
if (ar->mode == AR_MODE_NORMAL)
cr |= ARVCR1_NORMAL;
ar_outl(cr, ARVCR1);
/*
* Initialize IIC so that CPU can communicate with AR LSI,
* and send boot commands to AR LSI.
*/
init_iic();
for (i = 0; i < 0x100000; i++) { /* > 0xa1d10, 56ms */
if ((ar_inl(ARVCR0) & ARVCR0_VDS)) { /* VSYNC */
found = 1;
break;
}
}
if (found == 0)
return -ENODEV;
v4l2_info(&ar->v4l2_dev, "Initializing ");
iic(2, 0x78, 0x11, 0x01, 0x00); /* start */
iic(3, 0x78, 0x12, 0x00, 0x06);
iic(3, 0x78, 0x12, 0x12, 0x30);
iic(3, 0x78, 0x12, 0x15, 0x58);
iic(3, 0x78, 0x12, 0x17, 0x30);
printk(KERN_CONT ".");
iic(3, 0x78, 0x12, 0x1a, 0x97);
iic(3, 0x78, 0x12, 0x1b, 0xff);
iic(3, 0x78, 0x12, 0x1c, 0xff);
iic(3, 0x78, 0x12, 0x26, 0x10);
iic(3, 0x78, 0x12, 0x27, 0x00);
printk(KERN_CONT ".");
iic(2, 0x78, 0x34, 0x02, 0x00);
iic(2, 0x78, 0x7a, 0x10, 0x00);
iic(2, 0x78, 0x80, 0x39, 0x00);
iic(2, 0x78, 0x81, 0xe6, 0x00);
iic(2, 0x78, 0x8d, 0x00, 0x00);
printk(KERN_CONT ".");
iic(2, 0x78, 0x8e, 0x0c, 0x00);
iic(2, 0x78, 0x8f, 0x00, 0x00);
#if 0
iic(2, 0x78, 0x90, 0x00, 0x00); /* AWB on=1 off=0 */
#endif
iic(2, 0x78, 0x93, 0x01, 0x00);
iic(2, 0x78, 0x94, 0xcd, 0x00);
iic(2, 0x78, 0x95, 0x00, 0x00);
printk(KERN_CONT ".");
iic(2, 0x78, 0x96, 0xa0, 0x00);
iic(2, 0x78, 0x97, 0x00, 0x00);
iic(2, 0x78, 0x98, 0x60, 0x00);
iic(2, 0x78, 0x99, 0x01, 0x00);
iic(2, 0x78, 0x9a, 0x19, 0x00);
printk(KERN_CONT ".");
iic(2, 0x78, 0x9b, 0x02, 0x00);
iic(2, 0x78, 0x9c, 0xe8, 0x00);
iic(2, 0x78, 0x9d, 0x02, 0x00);
iic(2, 0x78, 0x9e, 0x2e, 0x00);
iic(2, 0x78, 0xb8, 0x78, 0x00);
iic(2, 0x78, 0xba, 0x05, 0x00);
#if 0
iic(2, 0x78, 0x83, 0x8c, 0x00); /* brightness */
#endif
printk(KERN_CONT ".");
/* color correction */
iic(3, 0x78, 0x49, 0x00, 0x95); /* a */
iic(3, 0x78, 0x49, 0x01, 0x96); /* b */
iic(3, 0x78, 0x49, 0x03, 0x85); /* c */
iic(3, 0x78, 0x49, 0x04, 0x97); /* d */
iic(3, 0x78, 0x49, 0x02, 0x7e); /* e(Lo) */
iic(3, 0x78, 0x49, 0x05, 0xa4); /* f(Lo) */
iic(3, 0x78, 0x49, 0x06, 0x04); /* e(Hi) */
iic(3, 0x78, 0x49, 0x07, 0x04); /* e(Hi) */
iic(2, 0x78, 0x48, 0x01, 0x00); /* on=1 off=0 */
printk(KERN_CONT ".");
iic(2, 0x78, 0x11, 0x00, 0x00); /* end */
printk(KERN_CONT " done\n");
return 0;
}
/****************************************************************************
*
* Video4Linux Module functions
*
****************************************************************************/
static const struct v4l2_file_operations ar_fops = {
.owner = THIS_MODULE,
.read = ar_read,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops ar_ioctl_ops = {
.vidioc_querycap = ar_querycap,
.vidioc_g_input = ar_g_input,
.vidioc_s_input = ar_s_input,
.vidioc_enum_input = ar_enum_input,
.vidioc_enum_fmt_vid_cap = ar_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = ar_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = ar_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = ar_try_fmt_vid_cap,
};
#define ALIGN4(x) ((((int)(x)) & 0x3) == 0)
static int __init ar_init(void)
{
struct ar *ar;
struct v4l2_device *v4l2_dev;
int ret;
int i;
ar = &ardev;
v4l2_dev = &ar->v4l2_dev;
strlcpy(v4l2_dev->name, "arv", sizeof(v4l2_dev->name));
v4l2_info(v4l2_dev, "Colour AR VGA driver %s\n", VERSION);
ret = v4l2_device_register(NULL, v4l2_dev);
if (ret < 0) {
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
return ret;
}
ret = -EIO;
#if USE_INT
/* allocate a DMA buffer for 1 line. */
ar->line_buff = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL | GFP_DMA);
if (ar->line_buff == NULL || !ALIGN4(ar->line_buff)) {
v4l2_err(v4l2_dev, "buffer allocation failed for DMA.\n");
ret = -ENOMEM;
goto out_end;
}
#endif
/* allocate buffers for a frame */
for (i = 0; i < MAX_AR_HEIGHT; i++) {
ar->frame[i] = kmalloc(MAX_AR_LINE_BYTES, GFP_KERNEL);
if (ar->frame[i] == NULL || !ALIGN4(ar->frame[i])) {
v4l2_err(v4l2_dev, "buffer allocation failed for frame.\n");
ret = -ENOMEM;
goto out_line_buff;
}
}
strlcpy(ar->vdev.name, "Colour AR VGA", sizeof(ar->vdev.name));
ar->vdev.v4l2_dev = v4l2_dev;
ar->vdev.fops = &ar_fops;
ar->vdev.ioctl_ops = &ar_ioctl_ops;
ar->vdev.release = video_device_release_empty;
video_set_drvdata(&ar->vdev, ar);
if (vga) {
ar->width = AR_WIDTH_VGA;
ar->height = AR_HEIGHT_VGA;
ar->size = AR_SIZE_VGA;
ar->frame_bytes = AR_FRAME_BYTES_VGA;
ar->line_bytes = AR_LINE_BYTES_VGA;
if (vga_interlace)
ar->mode = AR_MODE_INTERLACE;
else
ar->mode = AR_MODE_NORMAL;
} else {
ar->width = AR_WIDTH_QVGA;
ar->height = AR_HEIGHT_QVGA;
ar->size = AR_SIZE_QVGA;
ar->frame_bytes = AR_FRAME_BYTES_QVGA;
ar->line_bytes = AR_LINE_BYTES_QVGA;
ar->mode = AR_MODE_INTERLACE;
}
mutex_init(&ar->lock);
init_waitqueue_head(&ar->wait);
#if USE_INT
if (request_irq(M32R_IRQ_INT3, ar_interrupt, 0, "arv", ar)) {
v4l2_err("request_irq(%d) failed.\n", M32R_IRQ_INT3);
ret = -EIO;
goto out_irq;
}
#endif
if (ar_initialize(ar) != 0) {
v4l2_err(v4l2_dev, "M64278 not found.\n");
ret = -ENODEV;
goto out_dev;
}
/*
* ok, we can initialize h/w according to parameters,
* so register video device as a frame grabber type.
* device is named "video[0-64]".
* video_register_device() initializes h/w using ar_initialize().
*/
if (video_register_device(&ar->vdev, VFL_TYPE_GRABBER, video_nr) != 0) {
/* return -1, -ENFILE(full) or others */
v4l2_err(v4l2_dev, "register video (Colour AR) failed.\n");
ret = -ENODEV;
goto out_dev;
}
v4l2_info(v4l2_dev, "%s: Found M64278 VGA (IRQ %d, Freq %dMHz).\n",
video_device_node_name(&ar->vdev), M32R_IRQ_INT3, freq);
return 0;
out_dev:
#if USE_INT
free_irq(M32R_IRQ_INT3, ar);
out_irq:
#endif
for (i = 0; i < MAX_AR_HEIGHT; i++)
kfree(ar->frame[i]);
out_line_buff:
#if USE_INT
kfree(ar->line_buff);
out_end:
#endif
v4l2_device_unregister(&ar->v4l2_dev);
return ret;
}
static int __init ar_init_module(void)
{
freq = (boot_cpu_data.bus_clock / 1000000);
printk(KERN_INFO "arv: Bus clock %d\n", freq);
if (freq != 50 && freq != 75)
freq = DEFAULT_FREQ;
return ar_init();
}
static void __exit ar_cleanup_module(void)
{
struct ar *ar;
int i;
ar = &ardev;
video_unregister_device(&ar->vdev);
#if USE_INT
free_irq(M32R_IRQ_INT3, ar);
#endif
for (i = 0; i < MAX_AR_HEIGHT; i++)
kfree(ar->frame[i]);
#if USE_INT
kfree(ar->line_buff);
#endif
v4l2_device_unregister(&ar->v4l2_dev);
}
module_init(ar_init_module);
module_exit(ar_cleanup_module);
MODULE_AUTHOR("Takeo Takahashi <takahashi.takeo@renesas.com>");
MODULE_DESCRIPTION("Colour AR M64278(VGA) for Video4Linux");
MODULE_LICENSE("GPL");
