/* * 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/videodev.h> #include <media/v4l2-common.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(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 "0.03" #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_device { 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; unsigned long in_use; struct mutex lock; }; 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 int ar_initialize(struct video_device *dev); static inline 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 inline void wait_acknowledge(void) { int i; for (i = 0; i < 1000; i++) cpu_relax(); while (ar_inl(PLDI2CSTS) & PLDI2CSTS_NOACK) cpu_relax(); } /******************************************************************* * I2C functions *******************************************************************/ 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(); } 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 inline void wait_for_vertical_sync(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) printk("arv: 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 video_device *v = video_devdata(file); struct ar_device *ar = video_get_drvdata(v); 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) */ /* * Okey , kicks 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("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(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(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)) { printk("arv: 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 long ar_do_ioctl(struct file *file, unsigned int cmd, void *arg) { struct video_device *dev = video_devdata(file); struct ar_device *ar = video_get_drvdata(dev); DEBUG(1, "ar_ioctl()\n"); switch(cmd) { case VIDIOCGCAP: { struct video_capability *b = arg; DEBUG(1, "VIDIOCGCAP:\n"); strcpy(b->name, ar->vdev->name); b->type = VID_TYPE_CAPTURE; b->channels = 0; b->audios = 0; b->maxwidth = MAX_AR_WIDTH; b->maxheight = MAX_AR_HEIGHT; b->minwidth = MIN_AR_WIDTH; b->minheight = MIN_AR_HEIGHT; return 0; } case VIDIOCGCHAN: DEBUG(1, "VIDIOCGCHAN:\n"); return 0; case VIDIOCSCHAN: DEBUG(1, "VIDIOCSCHAN:\n"); return 0; case VIDIOCGTUNER: DEBUG(1, "VIDIOCGTUNER:\n"); return 0; case VIDIOCSTUNER: DEBUG(1, "VIDIOCSTUNER:\n"); return 0; case VIDIOCGPICT: DEBUG(1, "VIDIOCGPICT:\n"); return 0; case VIDIOCSPICT: DEBUG(1, "VIDIOCSPICT:\n"); return 0; case VIDIOCCAPTURE: DEBUG(1, "VIDIOCCAPTURE:\n"); return -EINVAL; case VIDIOCGWIN: { struct video_window *w = arg; DEBUG(1, "VIDIOCGWIN:\n"); memset(w, 0, sizeof(*w)); w->width = ar->width; w->height = ar->height; return 0; } case VIDIOCSWIN: { struct video_window *w = arg; DEBUG(1, "VIDIOCSWIN:\n"); if ((w->width != AR_WIDTH_VGA || w->height != AR_HEIGHT_VGA) && (w->width != AR_WIDTH_QVGA || w->height != AR_HEIGHT_QVGA)) return -EINVAL; mutex_lock(&ar->lock); ar->width = w->width; ar->height = w->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; } mutex_unlock(&ar->lock); return 0; } case VIDIOCGFBUF: DEBUG(1, "VIDIOCGFBUF:\n"); return -EINVAL; case VIDIOCSFBUF: DEBUG(1, "VIDIOCSFBUF:\n"); return -EINVAL; case VIDIOCKEY: DEBUG(1, "VIDIOCKEY:\n"); return 0; case VIDIOCGFREQ: DEBUG(1, "VIDIOCGFREQ:\n"); return -EINVAL; case VIDIOCSFREQ: DEBUG(1, "VIDIOCSFREQ:\n"); return -EINVAL; case VIDIOCGAUDIO: DEBUG(1, "VIDIOCGAUDIO:\n"); return -EINVAL; case VIDIOCSAUDIO: DEBUG(1, "VIDIOCSAUDIO:\n"); return -EINVAL; case VIDIOCSYNC: DEBUG(1, "VIDIOCSYNC:\n"); return -EINVAL; case VIDIOCMCAPTURE: DEBUG(1, "VIDIOCMCAPTURE:\n"); return -EINVAL; case VIDIOCGMBUF: DEBUG(1, "VIDIOCGMBUF:\n"); return -EINVAL; case VIDIOCGUNIT: DEBUG(1, "VIDIOCGUNIT:\n"); return -EINVAL; case VIDIOCGCAPTURE: DEBUG(1, "VIDIOCGCAPTURE:\n"); return -EINVAL; case VIDIOCSCAPTURE: DEBUG(1, "VIDIOCSCAPTURE:\n"); return -EINVAL; case VIDIOCSPLAYMODE: DEBUG(1, "VIDIOCSPLAYMODE:\n"); return -EINVAL; case VIDIOCSWRITEMODE: DEBUG(1, "VIDIOCSWRITEMODE:\n"); return -EINVAL; case VIDIOCGPLAYINFO: DEBUG(1, "VIDIOCGPLAYINFO:\n"); return -EINVAL; case VIDIOCSMICROCODE: DEBUG(1, "VIDIOCSMICROCODE:\n"); return -EINVAL; case VIDIOCGVBIFMT: DEBUG(1, "VIDIOCGVBIFMT:\n"); return -EINVAL; case VIDIOCSVBIFMT: DEBUG(1, "VIDIOCSVBIFMT:\n"); return -EINVAL; default: DEBUG(1, "Unknown ioctl(0x%08x)\n", cmd); return -ENOIOCTLCMD; } return 0; } static long ar_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { return video_usercopy(file, cmd, arg, ar_do_ioctl); } #if USE_INT /* * Interrupt handler */ static void ar_interrupt(int irq, void *dev) { struct ar_device *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 video_device *dev) { struct ar_device *ar = video_get_drvdata(dev); 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; printk("arv: 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("."); 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("."); 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("."); 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("."); 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("."); 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("."); /* 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("."); iic(2,0x78,0x11,0x00,0x00); /* end */ printk(" done\n"); return 0; } void ar_release(struct video_device *vfd) { struct ar_device *ar = video_get_drvdata(vfd); mutex_lock(&ar->lock); video_device_release(vfd); } /**************************************************************************** * * Video4Linux Module functions * ****************************************************************************/ static struct ar_device ardev; static int ar_exclusive_open(struct file *file) { return test_and_set_bit(0, &ardev.in_use) ? -EBUSY : 0; } static int ar_exclusive_release(struct file *file) { clear_bit(0, &ardev.in_use); return 0; } static const struct v4l2_file_operations ar_fops = { .owner = THIS_MODULE, .open = ar_exclusive_open, .release = ar_exclusive_release, .read = ar_read, .ioctl = ar_ioctl, }; static struct video_device ar_template = { .name = "Colour AR VGA", .fops = &ar_fops, .release = ar_release, }; #define ALIGN4(x) ((((int)(x)) & 0x3) == 0) static int __init ar_init(void) { struct ar_device *ar; int ret; int i; DEBUG(1, "ar_init:\n"); ret = -EIO; printk(KERN_INFO "arv: Colour AR VGA driver %s\n", VERSION); ar = &ardev; memset(ar, 0, sizeof(struct ar_device)); #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)) { printk("arv: 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])) { printk("arv: buffer allocation failed for frame.\n"); ret = -ENOMEM; goto out_line_buff; } } ar->vdev = video_device_alloc(); if (!ar->vdev) { printk(KERN_ERR "arv: video_device_alloc() failed\n"); return -ENOMEM; } memcpy(ar->vdev, &ar_template, sizeof(ar_template)); 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)) { printk("arv: request_irq(%d) failed.\n", M32R_IRQ_INT3); ret = -EIO; goto out_irq; } #endif if (ar_initialize(ar->vdev) != 0) { printk("arv: 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 */ printk("arv: register video (Colour AR) failed.\n"); ret = -ENODEV; goto out_dev; } printk("%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 return ret; } static int __init ar_init_module(void) { freq = (boot_cpu_data.bus_clock / 1000000); printk("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_device *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 } 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");