- 根目录:
- drivers
- media
- common
- saa7146_hlp.c
#include <linux/kernel.h>
#include <media/saa7146_vv.h>
static void calculate_output_format_register(struct saa7146_dev* saa, u32 palette, u32* clip_format)
{
/* clear out the necessary bits */
*clip_format &= 0x0000ffff;
/* set these bits new */
*clip_format |= (( ((palette&0xf00)>>8) << 30) | ((palette&0x00f) << 24) | (((palette&0x0f0)>>4) << 16));
}
static void calculate_hps_source_and_sync(struct saa7146_dev *dev, int source, int sync, u32* hps_ctrl)
{
*hps_ctrl &= ~(MASK_30 | MASK_31 | MASK_28);
*hps_ctrl |= (source << 30) | (sync << 28);
}
static void calculate_hxo_and_hyo(struct saa7146_vv *vv, u32* hps_h_scale, u32* hps_ctrl)
{
int hyo = 0, hxo = 0;
hyo = vv->standard->v_offset;
hxo = vv->standard->h_offset;
*hps_h_scale &= ~(MASK_B0 | 0xf00);
*hps_h_scale |= (hxo << 0);
*hps_ctrl &= ~(MASK_W0 | MASK_B2);
*hps_ctrl |= (hyo << 12);
}
/* helper functions for the calculation of the horizontal- and vertical
scaling registers, clip-format-register etc ...
these functions take pointers to the (most-likely read-out
original-values) and manipulate them according to the requested
changes.
*/
/* hps_coeff used for CXY and CXUV; scale 1/1 -> scale 1/64 */
static struct {
u16 hps_coeff;
u16 weight_sum;
} hps_h_coeff_tab [] = {
{0x00, 2}, {0x02, 4}, {0x00, 4}, {0x06, 8}, {0x02, 8},
{0x08, 8}, {0x00, 8}, {0x1E, 16}, {0x0E, 8}, {0x26, 8},
{0x06, 8}, {0x42, 8}, {0x02, 8}, {0x80, 8}, {0x00, 8},
{0xFE, 16}, {0xFE, 8}, {0x7E, 8}, {0x7E, 8}, {0x3E, 8},
{0x3E, 8}, {0x1E, 8}, {0x1E, 8}, {0x0E, 8}, {0x0E, 8},
{0x06, 8}, {0x06, 8}, {0x02, 8}, {0x02, 8}, {0x00, 8},
{0x00, 8}, {0xFE, 16}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8},
{0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8},
{0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8},
{0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0x7E, 8},
{0x7E, 8}, {0x3E, 8}, {0x3E, 8}, {0x1E, 8}, {0x1E, 8},
{0x0E, 8}, {0x0E, 8}, {0x06, 8}, {0x06, 8}, {0x02, 8},
{0x02, 8}, {0x00, 8}, {0x00, 8}, {0xFE, 16}
};
/* table of attenuation values for horizontal scaling */
static u8 h_attenuation[] = { 1, 2, 4, 8, 2, 4, 8, 16, 0};
/* calculate horizontal scale registers */
static int calculate_h_scale_registers(struct saa7146_dev *dev,
int in_x, int out_x, int flip_lr,
u32* hps_ctrl, u32* hps_v_gain, u32* hps_h_prescale, u32* hps_h_scale)
{
/* horizontal prescaler */
u32 dcgx = 0, xpsc = 0, xacm = 0, cxy = 0, cxuv = 0;
/* horizontal scaler */
u32 xim = 0, xp = 0, xsci =0;
/* vertical scale & gain */
u32 pfuv = 0;
/* helper variables */
u32 h_atten = 0, i = 0;
if ( 0 == out_x ) {
return -EINVAL;
}
/* mask out vanity-bit */
*hps_ctrl &= ~MASK_29;
/* calculate prescale-(xspc)-value: [n .. 1/2) : 1
[1/2 .. 1/3) : 2
[1/3 .. 1/4) : 3
... */
if (in_x > out_x) {
xpsc = in_x / out_x;
}
else {
/* zooming */
xpsc = 1;
}
/* if flip_lr-bit is set, number of pixels after
horizontal prescaling must be < 384 */
if ( 0 != flip_lr ) {
/* set vanity bit */
*hps_ctrl |= MASK_29;
while (in_x / xpsc >= 384 )
xpsc++;
}
/* if zooming is wanted, number of pixels after
horizontal prescaling must be < 768 */
else {
while ( in_x / xpsc >= 768 )
xpsc++;
}
/* maximum prescale is 64 (p.69) */
if ( xpsc > 64 )
xpsc = 64;
/* keep xacm clear*/
xacm = 0;
/* set horizontal filter parameters (CXY = CXUV) */
cxy = hps_h_coeff_tab[( (xpsc - 1) < 63 ? (xpsc - 1) : 63 )].hps_coeff;
cxuv = cxy;
/* calculate and set horizontal fine scale (xsci) */
/* bypass the horizontal scaler ? */
if ( (in_x == out_x) && ( 1 == xpsc ) )
xsci = 0x400;
else
xsci = ( (1024 * in_x) / (out_x * xpsc) ) + xpsc;
/* set start phase for horizontal fine scale (xp) to 0 */
xp = 0;
/* set xim, if we bypass the horizontal scaler */
if ( 0x400 == xsci )
xim = 1;
else
xim = 0;
/* if the prescaler is bypassed, enable horizontal
accumulation mode (xacm) and clear dcgx */
if( 1 == xpsc ) {
xacm = 1;
dcgx = 0;
} else {
xacm = 0;
/* get best match in the table of attenuations
for horizontal scaling */
h_atten = hps_h_coeff_tab[( (xpsc - 1) < 63 ? (xpsc - 1) : 63 )].weight_sum;
for (i = 0; h_attenuation[i] != 0; i++) {
if (h_attenuation[i] >= h_atten)
break;
}
dcgx = i;
}
/* the horizontal scaling increment controls the UV filter
to reduce the bandwidth to improve the display quality,
so set it ... */
if ( xsci == 0x400)
pfuv = 0x00;
else if ( xsci < 0x600)
pfuv = 0x01;
else if ( xsci < 0x680)
pfuv = 0x11;
else if ( xsci < 0x700)
pfuv = 0x22;
else
pfuv = 0x33;
*hps_v_gain &= MASK_W0|MASK_B2;
*hps_v_gain |= (pfuv << 24);
*hps_h_scale &= ~(MASK_W1 | 0xf000);
*hps_h_scale |= (xim << 31) | (xp << 24) | (xsci << 12);
*hps_h_prescale |= (dcgx << 27) | ((xpsc-1) << 18) | (xacm << 17) | (cxy << 8) | (cxuv << 0);
return 0;
}
static struct {
u16 hps_coeff;
u16 weight_sum;
} hps_v_coeff_tab [] = {
{0x0100, 2}, {0x0102, 4}, {0x0300, 4}, {0x0106, 8}, {0x0502, 8},
{0x0708, 8}, {0x0F00, 8}, {0x011E, 16}, {0x110E, 16}, {0x1926, 16},
{0x3906, 16}, {0x3D42, 16}, {0x7D02, 16}, {0x7F80, 16}, {0xFF00, 16},
{0x01FE, 32}, {0x01FE, 32}, {0x817E, 32}, {0x817E, 32}, {0xC13E, 32},
{0xC13E, 32}, {0xE11E, 32}, {0xE11E, 32}, {0xF10E, 32}, {0xF10E, 32},
{0xF906, 32}, {0xF906, 32}, {0xFD02, 32}, {0xFD02, 32}, {0xFF00, 32},
{0xFF00, 32}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64},
{0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64},
{0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64},
{0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x817E, 64},
{0x817E, 64}, {0xC13E, 64}, {0xC13E, 64}, {0xE11E, 64}, {0xE11E, 64},
{0xF10E, 64}, {0xF10E, 64}, {0xF906, 64}, {0xF906, 64}, {0xFD02, 64},
{0xFD02, 64}, {0xFF00, 64}, {0xFF00, 64}, {0x01FE, 128}
};
/* table of attenuation values for vertical scaling */
static u16 v_attenuation[] = { 2, 4, 8, 16, 32, 64, 128, 256, 0};
/* calculate vertical scale registers */
static int calculate_v_scale_registers(struct saa7146_dev *dev, enum v4l2_field field,
int in_y, int out_y, u32* hps_v_scale, u32* hps_v_gain)
{
int lpi = 0;
/* vertical scaling */
u32 yacm = 0, ysci = 0, yacl = 0, ypo = 0, ype = 0;
/* vertical scale & gain */
u32 dcgy = 0, cya_cyb = 0;
/* helper variables */
u32 v_atten = 0, i = 0;
/* error, if vertical zooming */
if ( in_y < out_y ) {
return -EINVAL;
}
/* linear phase interpolation may be used
if scaling is between 1 and 1/2 (both fields used)
or scaling is between 1/2 and 1/4 (if only one field is used) */
if (V4L2_FIELD_HAS_BOTH(field)) {
if( 2*out_y >= in_y) {
lpi = 1;
}
} else if (field == V4L2_FIELD_TOP
|| field == V4L2_FIELD_ALTERNATE
|| field == V4L2_FIELD_BOTTOM) {
if( 4*out_y >= in_y ) {
lpi = 1;
}
out_y *= 2;
}
if( 0 != lpi ) {
yacm = 0;
yacl = 0;
cya_cyb = 0x00ff;
/* calculate scaling increment */
if ( in_y > out_y )
ysci = ((1024 * in_y) / (out_y + 1)) - 1024;
else
ysci = 0;
dcgy = 0;
/* calculate ype and ypo */
ype = ysci / 16;
ypo = ype + (ysci / 64);
} else {
yacm = 1;
/* calculate scaling increment */
ysci = (((10 * 1024 * (in_y - out_y - 1)) / in_y) + 9) / 10;
/* calculate ype and ypo */
ypo = ype = ((ysci + 15) / 16);
/* the sequence length interval (yacl) has to be set according
to the prescale value, e.g. [n .. 1/2) : 0
[1/2 .. 1/3) : 1
[1/3 .. 1/4) : 2
... */
if ( ysci < 512) {
yacl = 0;
} else {
yacl = ( ysci / (1024 - ysci) );
}
/* get filter coefficients for cya, cyb from table hps_v_coeff_tab */
cya_cyb = hps_v_coeff_tab[ (yacl < 63 ? yacl : 63 ) ].hps_coeff;
/* get best match in the table of attenuations for vertical scaling */
v_atten = hps_v_coeff_tab[ (yacl < 63 ? yacl : 63 ) ].weight_sum;
for (i = 0; v_attenuation[i] != 0; i++) {
if (v_attenuation[i] >= v_atten)
break;
}
dcgy = i;
}
/* ypo and ype swapped in spec ? */
*hps_v_scale |= (yacm << 31) | (ysci << 21) | (yacl << 15) | (ypo << 8 ) | (ype << 1);
*hps_v_gain &= ~(MASK_W0|MASK_B2);
*hps_v_gain |= (dcgy << 16) | (cya_cyb << 0);
return 0;
}
/* simple bubble-sort algorithm with duplicate elimination */
static int sort_and_eliminate(u32* values, int* count)
{
int low = 0, high = 0, top = 0, temp = 0;
int cur = 0, next = 0;
/* sanity checks */
if( (0 > *count) || (NULL == values) ) {
return -EINVAL;
}
/* bubble sort the first @count items of the array @values */
for( top = *count; top > 0; top--) {
for( low = 0, high = 1; high < top; low++, high++) {
if( values[low] > values[high] ) {
temp = values[low];
values[low] = values[high];
values[high] = temp;
}
}
}
/* remove duplicate items */
for( cur = 0, next = 1; next < *count; next++) {
if( values[cur] != values[next])
values[++cur] = values[next];
}
*count = cur + 1;
return 0;
}
static void calculate_clipping_registers_rect(struct saa7146_dev *dev, struct saa7146_fh *fh,
struct saa7146_video_dma *vdma2, u32* clip_format, u32* arbtr_ctrl, enum v4l2_field field)
{
struct saa7146_vv *vv = dev->vv_data;
__le32 *clipping = vv->d_clipping.cpu_addr;
int width = fh->ov.win.w.width;
int height = fh->ov.win.w.height;
int clipcount = fh->ov.nclips;
u32 line_list[32];
u32 pixel_list[32];
int numdwords = 0;
int i = 0, j = 0;
int cnt_line = 0, cnt_pixel = 0;
int x[32], y[32], w[32], h[32];
/* clear out memory */
memset(&line_list[0], 0x00, sizeof(u32)*32);
memset(&pixel_list[0], 0x00, sizeof(u32)*32);
memset(clipping, 0x00, SAA7146_CLIPPING_MEM);
/* fill the line and pixel-lists */
for(i = 0; i < clipcount; i++) {
int l = 0, r = 0, t = 0, b = 0;
x[i] = fh->ov.clips[i].c.left;
y[i] = fh->ov.clips[i].c.top;
w[i] = fh->ov.clips[i].c.width;
h[i] = fh->ov.clips[i].c.height;
if( w[i] < 0) {
x[i] += w[i]; w[i] = -w[i];
}
if( h[i] < 0) {
y[i] += h[i]; h[i] = -h[i];
}
if( x[i] < 0) {
w[i] += x[i]; x[i] = 0;
}
if( y[i] < 0) {
h[i] += y[i]; y[i] = 0;
}
if( 0 != vv->vflip ) {
y[i] = height - y[i] - h[i];
}
l = x[i];
r = x[i]+w[i];
t = y[i];
b = y[i]+h[i];
/* insert left/right coordinates */
pixel_list[ 2*i ] = min_t(int, l, width);
pixel_list[(2*i)+1] = min_t(int, r, width);
/* insert top/bottom coordinates */
line_list[ 2*i ] = min_t(int, t, height);
line_list[(2*i)+1] = min_t(int, b, height);
}
/* sort and eliminate lists */
cnt_line = cnt_pixel = 2*clipcount;
sort_and_eliminate( &pixel_list[0], &cnt_pixel );
sort_and_eliminate( &line_list[0], &cnt_line );
/* calculate the number of used u32s */
numdwords = max_t(int, (cnt_line+1), (cnt_pixel+1))*2;
numdwords = max_t(int, 4, numdwords);
numdwords = min_t(int, 64, numdwords);
/* fill up cliptable */
for(i = 0; i < cnt_pixel; i++) {
clipping[2*i] |= cpu_to_le32(pixel_list[i] << 16);
}
for(i = 0; i < cnt_line; i++) {
clipping[(2*i)+1] |= cpu_to_le32(line_list[i] << 16);
}
/* fill up cliptable with the display infos */
for(j = 0; j < clipcount; j++) {
for(i = 0; i < cnt_pixel; i++) {
if( x[j] < 0)
x[j] = 0;
if( pixel_list[i] < (x[j] + w[j])) {
if ( pixel_list[i] >= x[j] ) {
clipping[2*i] |= cpu_to_le32(1 << j);
}
}
}
for(i = 0; i < cnt_line; i++) {
if( y[j] < 0)
y[j] = 0;
if( line_list[i] < (y[j] + h[j]) ) {
if( line_list[i] >= y[j] ) {
clipping[(2*i)+1] |= cpu_to_le32(1 << j);
}
}
}
}
/* adjust arbitration control register */
*arbtr_ctrl &= 0xffff00ff;
*arbtr_ctrl |= 0x00001c00;
vdma2->base_even = vv->d_clipping.dma_handle;
vdma2->base_odd = vv->d_clipping.dma_handle;
vdma2->prot_addr = vv->d_clipping.dma_handle+((sizeof(u32))*(numdwords));
vdma2->base_page = 0x04;
vdma2->pitch = 0x00;
vdma2->num_line_byte = (0 << 16 | (sizeof(u32))*(numdwords-1) );
/* set clipping-mode. this depends on the field(s) used */
*clip_format &= 0xfffffff7;
if (V4L2_FIELD_HAS_BOTH(field)) {
*clip_format |= 0x00000008;
} else {
*clip_format |= 0x00000000;
}
}
/* disable clipping */
static void saa7146_disable_clipping(struct saa7146_dev *dev)
{
u32 clip_format = saa7146_read(dev, CLIP_FORMAT_CTRL);
/* mask out relevant bits (=lower word)*/
clip_format &= MASK_W1;
/* upload clipping-registers*/
saa7146_write(dev, CLIP_FORMAT_CTRL,clip_format);
saa7146_write(dev, MC2, (MASK_05 | MASK_21));
/* disable video dma2 */
saa7146_write(dev, MC1, MASK_21);
}
static void saa7146_set_clipping_rect(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
enum v4l2_field field = fh->ov.win.field;
struct saa7146_video_dma vdma2;
u32 clip_format;
u32 arbtr_ctrl;
/* check clipcount, disable clipping if clipcount == 0*/
if( fh->ov.nclips == 0 ) {
saa7146_disable_clipping(dev);
return;
}
clip_format = saa7146_read(dev, CLIP_FORMAT_CTRL);
arbtr_ctrl = saa7146_read(dev, PCI_BT_V1);
calculate_clipping_registers_rect(dev, fh, &vdma2, &clip_format, &arbtr_ctrl, field);
/* set clipping format */
clip_format &= 0xffff0008;
clip_format |= (SAA7146_CLIPPING_RECT << 4);
/* prepare video dma2 */
saa7146_write(dev, BASE_EVEN2, vdma2.base_even);
saa7146_write(dev, BASE_ODD2, vdma2.base_odd);
saa7146_write(dev, PROT_ADDR2, vdma2.prot_addr);
saa7146_write(dev, BASE_PAGE2, vdma2.base_page);
saa7146_write(dev, PITCH2, vdma2.pitch);
saa7146_write(dev, NUM_LINE_BYTE2, vdma2.num_line_byte);
/* prepare the rest */
saa7146_write(dev, CLIP_FORMAT_CTRL,clip_format);
saa7146_write(dev, PCI_BT_V1, arbtr_ctrl);
/* upload clip_control-register, clipping-registers, enable video dma2 */
saa7146_write(dev, MC2, (MASK_05 | MASK_21 | MASK_03 | MASK_19));
saa7146_write(dev, MC1, (MASK_05 | MASK_21));
}
static void saa7146_set_window(struct saa7146_dev *dev, int width, int height, enum v4l2_field field)
{
struct saa7146_vv *vv = dev->vv_data;
int source = vv->current_hps_source;
int sync = vv->current_hps_sync;
u32 hps_v_scale = 0, hps_v_gain = 0, hps_ctrl = 0, hps_h_prescale = 0, hps_h_scale = 0;
/* set vertical scale */
hps_v_scale = 0; /* all bits get set by the function-call */
hps_v_gain = 0; /* fixme: saa7146_read(dev, HPS_V_GAIN);*/
calculate_v_scale_registers(dev, field, vv->standard->v_field*2, height, &hps_v_scale, &hps_v_gain);
/* set horizontal scale */
hps_ctrl = 0;
hps_h_prescale = 0; /* all bits get set in the function */
hps_h_scale = 0;
calculate_h_scale_registers(dev, vv->standard->h_pixels, width, vv->hflip, &hps_ctrl, &hps_v_gain, &hps_h_prescale, &hps_h_scale);
/* set hyo and hxo */
calculate_hxo_and_hyo(vv, &hps_h_scale, &hps_ctrl);
calculate_hps_source_and_sync(dev, source, sync, &hps_ctrl);
/* write out new register contents */
saa7146_write(dev, HPS_V_SCALE, hps_v_scale);
saa7146_write(dev, HPS_V_GAIN, hps_v_gain);
saa7146_write(dev, HPS_CTRL, hps_ctrl);
saa7146_write(dev, HPS_H_PRESCALE,hps_h_prescale);
saa7146_write(dev, HPS_H_SCALE, hps_h_scale);
/* upload shadow-ram registers */
saa7146_write(dev, MC2, (MASK_05 | MASK_06 | MASK_21 | MASK_22) );
}
/* calculate the new memory offsets for a desired position */
static void saa7146_set_position(struct saa7146_dev *dev, int w_x, int w_y, int w_height, enum v4l2_field field, u32 pixelformat)
{
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev, pixelformat);
int b_depth = vv->ov_fmt->depth;
int b_bpl = vv->ov_fb.fmt.bytesperline;
/* The unsigned long cast is to remove a 64-bit compile warning since
it looks like a 64-bit address is cast to a 32-bit value, even
though the base pointer is really a 32-bit physical address that
goes into a 32-bit DMA register.
FIXME: might not work on some 64-bit platforms, but see the FIXME
in struct v4l2_framebuffer (videodev2.h) for that.
*/
u32 base = (u32)(unsigned long)vv->ov_fb.base;
struct saa7146_video_dma vdma1;
/* calculate memory offsets for picture, look if we shall top-down-flip */
vdma1.pitch = 2*b_bpl;
if ( 0 == vv->vflip ) {
vdma1.base_even = base + (w_y * (vdma1.pitch/2)) + (w_x * (b_depth / 8));
vdma1.base_odd = vdma1.base_even + (vdma1.pitch / 2);
vdma1.prot_addr = vdma1.base_even + (w_height * (vdma1.pitch / 2));
}
else {
vdma1.base_even = base + ((w_y+w_height) * (vdma1.pitch/2)) + (w_x * (b_depth / 8));
vdma1.base_odd = vdma1.base_even - (vdma1.pitch / 2);
vdma1.prot_addr = vdma1.base_odd - (w_height * (vdma1.pitch / 2));
}
if (V4L2_FIELD_HAS_BOTH(field)) {
} else if (field == V4L2_FIELD_ALTERNATE) {
/* fixme */
vdma1.base_odd = vdma1.prot_addr;
vdma1.pitch /= 2;
} else if (field == V4L2_FIELD_TOP) {
vdma1.base_odd = vdma1.prot_addr;
vdma1.pitch /= 2;
} else if (field == V4L2_FIELD_BOTTOM) {
vdma1.base_odd = vdma1.base_even;
vdma1.base_even = vdma1.prot_addr;
vdma1.pitch /= 2;
}
if ( 0 != vv->vflip ) {
vdma1.pitch *= -1;
}
vdma1.base_page = sfmt->swap;
vdma1.num_line_byte = (vv->standard->v_field<<16)+vv->standard->h_pixels;
saa7146_write_out_dma(dev, 1, &vdma1);
}
static void saa7146_set_output_format(struct saa7146_dev *dev, unsigned long palette)
{
u32 clip_format = saa7146_read(dev, CLIP_FORMAT_CTRL);
/* call helper function */
calculate_output_format_register(dev,palette,&clip_format);
/* update the hps registers */
saa7146_write(dev, CLIP_FORMAT_CTRL, clip_format);
saa7146_write(dev, MC2, (MASK_05 | MASK_21));
}
/* select input-source */
void saa7146_set_hps_source_and_sync(struct saa7146_dev *dev, int source, int sync)
{
struct saa7146_vv *vv = dev->vv_data;
u32 hps_ctrl = 0;
/* read old state */
hps_ctrl = saa7146_read(dev, HPS_CTRL);
hps_ctrl &= ~( MASK_31 | MASK_30 | MASK_28 );
hps_ctrl |= (source << 30) | (sync << 28);
/* write back & upload register */
saa7146_write(dev, HPS_CTRL, hps_ctrl);
saa7146_write(dev, MC2, (MASK_05 | MASK_21));
vv->current_hps_source = source;
vv->current_hps_sync = sync;
}
EXPORT_SYMBOL_GPL(saa7146_set_hps_source_and_sync);
int saa7146_enable_overlay(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
struct saa7146_vv *vv = dev->vv_data;
saa7146_set_window(dev, fh->ov.win.w.width, fh->ov.win.w.height, fh->ov.win.field);
saa7146_set_position(dev, fh->ov.win.w.left, fh->ov.win.w.top, fh->ov.win.w.height, fh->ov.win.field, vv->ov_fmt->pixelformat);
saa7146_set_output_format(dev, vv->ov_fmt->trans);
saa7146_set_clipping_rect(fh);
/* enable video dma1 */
saa7146_write(dev, MC1, (MASK_06 | MASK_22));
return 0;
}
void saa7146_disable_overlay(struct saa7146_fh *fh)
{
struct saa7146_dev *dev = fh->dev;
/* disable clipping + video dma1 */
saa7146_disable_clipping(dev);
saa7146_write(dev, MC1, MASK_22);
}
void saa7146_write_out_dma(struct saa7146_dev* dev, int which, struct saa7146_video_dma* vdma)
{
int where = 0;
if( which < 1 || which > 3) {
return;
}
/* calculate starting address */
where = (which-1)*0x18;
saa7146_write(dev, where, vdma->base_odd);
saa7146_write(dev, where+0x04, vdma->base_even);
saa7146_write(dev, where+0x08, vdma->prot_addr);
saa7146_write(dev, where+0x0c, vdma->pitch);
saa7146_write(dev, where+0x10, vdma->base_page);
saa7146_write(dev, where+0x14, vdma->num_line_byte);
/* upload */
saa7146_write(dev, MC2, (MASK_02<<(which-1))|(MASK_18<<(which-1)));
/*
printk("vdma%d.base_even: 0x%08x\n", which,vdma->base_even);
printk("vdma%d.base_odd: 0x%08x\n", which,vdma->base_odd);
printk("vdma%d.prot_addr: 0x%08x\n", which,vdma->prot_addr);
printk("vdma%d.base_page: 0x%08x\n", which,vdma->base_page);
printk("vdma%d.pitch: 0x%08x\n", which,vdma->pitch);
printk("vdma%d.num_line_byte: 0x%08x\n", which,vdma->num_line_byte);
*/
}
static int calculate_video_dma_grab_packed(struct saa7146_dev* dev, struct saa7146_buf *buf)
{
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_video_dma vdma1;
struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
int width = buf->fmt->width;
int height = buf->fmt->height;
int bytesperline = buf->fmt->bytesperline;
enum v4l2_field field = buf->fmt->field;
int depth = sfmt->depth;
DEB_CAP(("[size=%dx%d,fields=%s]\n",
width,height,v4l2_field_names[field]));
if( bytesperline != 0) {
vdma1.pitch = bytesperline*2;
} else {
vdma1.pitch = (width*depth*2)/8;
}
vdma1.num_line_byte = ((vv->standard->v_field<<16) + vv->standard->h_pixels);
vdma1.base_page = buf->pt[0].dma | ME1 | sfmt->swap;
if( 0 != vv->vflip ) {
vdma1.prot_addr = buf->pt[0].offset;
vdma1.base_even = buf->pt[0].offset+(vdma1.pitch/2)*height;
vdma1.base_odd = vdma1.base_even - (vdma1.pitch/2);
} else {
vdma1.base_even = buf->pt[0].offset;
vdma1.base_odd = vdma1.base_even + (vdma1.pitch/2);
vdma1.prot_addr = buf->pt[0].offset+(vdma1.pitch/2)*height;
}
if (V4L2_FIELD_HAS_BOTH(field)) {
} else if (field == V4L2_FIELD_ALTERNATE) {
/* fixme */
if ( vv->last_field == V4L2_FIELD_TOP ) {
vdma1.base_odd = vdma1.prot_addr;
vdma1.pitch /= 2;
} else if ( vv->last_field == V4L2_FIELD_BOTTOM ) {
vdma1.base_odd = vdma1.base_even;
vdma1.base_even = vdma1.prot_addr;
vdma1.pitch /= 2;
}
} else if (field == V4L2_FIELD_TOP) {
vdma1.base_odd = vdma1.prot_addr;
vdma1.pitch /= 2;
} else if (field == V4L2_FIELD_BOTTOM) {
vdma1.base_odd = vdma1.base_even;
vdma1.base_even = vdma1.prot_addr;
vdma1.pitch /= 2;
}
if( 0 != vv->vflip ) {
vdma1.pitch *= -1;
}
saa7146_write_out_dma(dev, 1, &vdma1);
return 0;
}
static int calc_planar_422(struct saa7146_vv *vv, struct saa7146_buf *buf, struct saa7146_video_dma *vdma2, struct saa7146_video_dma *vdma3)
{
int height = buf->fmt->height;
int width = buf->fmt->width;
vdma2->pitch = width;
vdma3->pitch = width;
/* fixme: look at bytesperline! */
if( 0 != vv->vflip ) {
vdma2->prot_addr = buf->pt[1].offset;
vdma2->base_even = ((vdma2->pitch/2)*height)+buf->pt[1].offset;
vdma2->base_odd = vdma2->base_even - (vdma2->pitch/2);
vdma3->prot_addr = buf->pt[2].offset;
vdma3->base_even = ((vdma3->pitch/2)*height)+buf->pt[2].offset;
vdma3->base_odd = vdma3->base_even - (vdma3->pitch/2);
} else {
vdma3->base_even = buf->pt[2].offset;
vdma3->base_odd = vdma3->base_even + (vdma3->pitch/2);
vdma3->prot_addr = (vdma3->pitch/2)*height+buf->pt[2].offset;
vdma2->base_even = buf->pt[1].offset;
vdma2->base_odd = vdma2->base_even + (vdma2->pitch/2);
vdma2->prot_addr = (vdma2->pitch/2)*height+buf->pt[1].offset;
}
return 0;
}
static int calc_planar_420(struct saa7146_vv *vv, struct saa7146_buf *buf, struct saa7146_video_dma *vdma2, struct saa7146_video_dma *vdma3)
{
int height = buf->fmt->height;
int width = buf->fmt->width;
vdma2->pitch = width/2;
vdma3->pitch = width/2;
if( 0 != vv->vflip ) {
vdma2->prot_addr = buf->pt[2].offset;
vdma2->base_even = ((vdma2->pitch/2)*height)+buf->pt[2].offset;
vdma2->base_odd = vdma2->base_even - (vdma2->pitch/2);
vdma3->prot_addr = buf->pt[1].offset;
vdma3->base_even = ((vdma3->pitch/2)*height)+buf->pt[1].offset;
vdma3->base_odd = vdma3->base_even - (vdma3->pitch/2);
} else {
vdma3->base_even = buf->pt[2].offset;
vdma3->base_odd = vdma3->base_even + (vdma3->pitch);
vdma3->prot_addr = (vdma3->pitch/2)*height+buf->pt[2].offset;
vdma2->base_even = buf->pt[1].offset;
vdma2->base_odd = vdma2->base_even + (vdma2->pitch);
vdma2->prot_addr = (vdma2->pitch/2)*height+buf->pt[1].offset;
}
return 0;
}
static int calculate_video_dma_grab_planar(struct saa7146_dev* dev, struct saa7146_buf *buf)
{
struct saa7146_vv *vv = dev->vv_data;
struct saa7146_video_dma vdma1;
struct saa7146_video_dma vdma2;
struct saa7146_video_dma vdma3;
struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
int width = buf->fmt->width;
int height = buf->fmt->height;
enum v4l2_field field = buf->fmt->field;
BUG_ON(0 == buf->pt[0].dma);
BUG_ON(0 == buf->pt[1].dma);
BUG_ON(0 == buf->pt[2].dma);
DEB_CAP(("[size=%dx%d,fields=%s]\n",
width,height,v4l2_field_names[field]));
/* fixme: look at bytesperline! */
/* fixme: what happens for user space buffers here?. The offsets are
most likely wrong, this version here only works for page-aligned
buffers, modifications to the pagetable-functions are necessary...*/
vdma1.pitch = width*2;
vdma1.num_line_byte = ((vv->standard->v_field<<16) + vv->standard->h_pixels);
vdma1.base_page = buf->pt[0].dma | ME1;
if( 0 != vv->vflip ) {
vdma1.prot_addr = buf->pt[0].offset;
vdma1.base_even = ((vdma1.pitch/2)*height)+buf->pt[0].offset;
vdma1.base_odd = vdma1.base_even - (vdma1.pitch/2);
} else {
vdma1.base_even = buf->pt[0].offset;
vdma1.base_odd = vdma1.base_even + (vdma1.pitch/2);
vdma1.prot_addr = (vdma1.pitch/2)*height+buf->pt[0].offset;
}
vdma2.num_line_byte = 0; /* unused */
vdma2.base_page = buf->pt[1].dma | ME1;
vdma3.num_line_byte = 0; /* unused */
vdma3.base_page = buf->pt[2].dma | ME1;
switch( sfmt->depth ) {
case 12: {
calc_planar_420(vv,buf,&vdma2,&vdma3);
break;
}
case 16: {
calc_planar_422(vv,buf,&vdma2,&vdma3);
break;
}
default: {
return -1;
}
}
if (V4L2_FIELD_HAS_BOTH(field)) {
} else if (field == V4L2_FIELD_ALTERNATE) {
/* fixme */
vdma1.base_odd = vdma1.prot_addr;
vdma1.pitch /= 2;
vdma2.base_odd = vdma2.prot_addr;
vdma2.pitch /= 2;
vdma3.base_odd = vdma3.prot_addr;
vdma3.pitch /= 2;
} else if (field == V4L2_FIELD_TOP) {
vdma1.base_odd = vdma1.prot_addr;
vdma1.pitch /= 2;
vdma2.base_odd = vdma2.prot_addr;
vdma2.pitch /= 2;
vdma3.base_odd = vdma3.prot_addr;
vdma3.pitch /= 2;
} else if (field == V4L2_FIELD_BOTTOM) {
vdma1.base_odd = vdma1.base_even;
vdma1.base_even = vdma1.prot_addr;
vdma1.pitch /= 2;
vdma2.base_odd = vdma2.base_even;
vdma2.base_even = vdma2.prot_addr;
vdma2.pitch /= 2;
vdma3.base_odd = vdma3.base_even;
vdma3.base_even = vdma3.prot_addr;
vdma3.pitch /= 2;
}
if( 0 != vv->vflip ) {
vdma1.pitch *= -1;
vdma2.pitch *= -1;
vdma3.pitch *= -1;
}
saa7146_write_out_dma(dev, 1, &vdma1);
if( (sfmt->flags & FORMAT_BYTE_SWAP) != 0 ) {
saa7146_write_out_dma(dev, 3, &vdma2);
saa7146_write_out_dma(dev, 2, &vdma3);
} else {
saa7146_write_out_dma(dev, 2, &vdma2);
saa7146_write_out_dma(dev, 3, &vdma3);
}
return 0;
}
static void program_capture_engine(struct saa7146_dev *dev, int planar)
{
struct saa7146_vv *vv = dev->vv_data;
int count = 0;
unsigned long e_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_E_FID_A : CMD_E_FID_B;
unsigned long o_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_O_FID_A : CMD_O_FID_B;
/* wait for o_fid_a/b / e_fid_a/b toggle only if rps register 0 is not set*/
WRITE_RPS0(CMD_PAUSE | CMD_OAN | CMD_SIG0 | o_wait);
WRITE_RPS0(CMD_PAUSE | CMD_OAN | CMD_SIG0 | e_wait);
/* set rps register 0 */
WRITE_RPS0(CMD_WR_REG | (1 << 8) | (MC2/4));
WRITE_RPS0(MASK_27 | MASK_11);
/* turn on video-dma1 */
WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
WRITE_RPS0(MASK_06 | MASK_22); /* => mask */
WRITE_RPS0(MASK_06 | MASK_22); /* => values */
if( 0 != planar ) {
/* turn on video-dma2 */
WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
WRITE_RPS0(MASK_05 | MASK_21); /* => mask */
WRITE_RPS0(MASK_05 | MASK_21); /* => values */
/* turn on video-dma3 */
WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
WRITE_RPS0(MASK_04 | MASK_20); /* => mask */
WRITE_RPS0(MASK_04 | MASK_20); /* => values */
}
/* wait for o_fid_a/b / e_fid_a/b toggle */
if ( vv->last_field == V4L2_FIELD_INTERLACED ) {
WRITE_RPS0(CMD_PAUSE | o_wait);
WRITE_RPS0(CMD_PAUSE | e_wait);
} else if ( vv->last_field == V4L2_FIELD_TOP ) {
WRITE_RPS0(CMD_PAUSE | (vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? MASK_10 : MASK_09));
WRITE_RPS0(CMD_PAUSE | o_wait);
} else if ( vv->last_field == V4L2_FIELD_BOTTOM ) {
WRITE_RPS0(CMD_PAUSE | (vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? MASK_10 : MASK_09));
WRITE_RPS0(CMD_PAUSE | e_wait);
}
/* turn off video-dma1 */
WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
WRITE_RPS0(MASK_22 | MASK_06); /* => mask */
WRITE_RPS0(MASK_22); /* => values */
if( 0 != planar ) {
/* turn off video-dma2 */
WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
WRITE_RPS0(MASK_05 | MASK_21); /* => mask */
WRITE_RPS0(MASK_21); /* => values */
/* turn off video-dma3 */
WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
WRITE_RPS0(MASK_04 | MASK_20); /* => mask */
WRITE_RPS0(MASK_20); /* => values */
}
/* generate interrupt */
WRITE_RPS0(CMD_INTERRUPT);
/* stop */
WRITE_RPS0(CMD_STOP);
}
void saa7146_set_capture(struct saa7146_dev *dev, struct saa7146_buf *buf, struct saa7146_buf *next)
{
struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat);
struct saa7146_vv *vv = dev->vv_data;
u32 vdma1_prot_addr;
DEB_CAP(("buf:%p, next:%p\n",buf,next));
vdma1_prot_addr = saa7146_read(dev, PROT_ADDR1);
if( 0 == vdma1_prot_addr ) {
/* clear out beginning of streaming bit (rps register 0)*/
DEB_CAP(("forcing sync to new frame\n"));
saa7146_write(dev, MC2, MASK_27 );
}
saa7146_set_window(dev, buf->fmt->width, buf->fmt->height, buf->fmt->field);
saa7146_set_output_format(dev, sfmt->trans);
saa7146_disable_clipping(dev);
if ( vv->last_field == V4L2_FIELD_INTERLACED ) {
} else if ( vv->last_field == V4L2_FIELD_TOP ) {
vv->last_field = V4L2_FIELD_BOTTOM;
} else if ( vv->last_field == V4L2_FIELD_BOTTOM ) {
vv->last_field = V4L2_FIELD_TOP;
}
if( 0 != IS_PLANAR(sfmt->trans)) {
calculate_video_dma_grab_planar(dev, buf);
program_capture_engine(dev,1);
} else {
calculate_video_dma_grab_packed(dev, buf);
program_capture_engine(dev,0);
}
/*
printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
printk("vdma%d => vptr : 0x%08x\n", 1,saa7146_read(dev,PCI_VDP1));
*/
/* write the address of the rps-program */
saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
/* turn on rps */
saa7146_write(dev, MC1, (MASK_12 | MASK_28));
}