| bktr_core.c (43099) | bktr_core.c (43311) |
|---|---|
| 1/* $Id: brooktree848.c,v 1.61 1998/12/14 06:32:54 dillon Exp $ */ | 1/* $Id: brooktree848.c,v 1.62 1999/01/23 11:32:06 roger Exp $ */ |
| 2/* BT848 Driver for Brooktree's Bt848 based cards. 3 The Brooktree BT848 Driver driver is based upon Mark Tinguely and 4 Jim Lowe's driver for the Matrox Meteor PCI card . The 5 Philips SAA 7116 and SAA 7196 are very different chipsets than 6 the BT848. For starters, the BT848 is a one chipset solution and 7 it incorporates a RISC engine to control the DMA transfers -- 8 that is it the actual dma process is control by a program which 9 resides in the hosts memory also the register definitions between --- 3169 unchanged lines hidden (view full) --- 3179 u_int skip, start_skip; 3180 3181 /* For RGB24, we need to align the component in FIFO Byte Lane 0 */ 3182 /* to the 1st byte in the mem dword containing our start addr. */ 3183 /* BTW, we know this pixfmt's 1st byte is Blue; thus the start addr */ 3184 /* must be Blue. */ 3185 start_skip = 0; 3186 if (( pf->type == METEOR_PIXTYPE_RGB ) && ( pf->Bpp == 3 )) | 2/* BT848 Driver for Brooktree's Bt848 based cards. 3 The Brooktree BT848 Driver driver is based upon Mark Tinguely and 4 Jim Lowe's driver for the Matrox Meteor PCI card . The 5 Philips SAA 7116 and SAA 7196 are very different chipsets than 6 the BT848. For starters, the BT848 is a one chipset solution and 7 it incorporates a RISC engine to control the DMA transfers -- 8 that is it the actual dma process is control by a program which 9 resides in the hosts memory also the register definitions between --- 3169 unchanged lines hidden (view full) --- 3179 u_int skip, start_skip; 3180 3181 /* For RGB24, we need to align the component in FIFO Byte Lane 0 */ 3182 /* to the 1st byte in the mem dword containing our start addr. */ 3183 /* BTW, we know this pixfmt's 1st byte is Blue; thus the start addr */ 3184 /* must be Blue. */ 3185 start_skip = 0; 3186 if (( pf->type == METEOR_PIXTYPE_RGB ) && ( pf->Bpp == 3 )) |
| 3187 switch ( ((uintptr_t) (void *) *target_buffer) % 4 ) { | 3187 switch ( ((uintptr_t) (volatile void *) *target_buffer) % 4 ) { |
| 3188 case 2 : start_skip = 4 ; break; 3189 case 1 : start_skip = 8 ; break; 3190 } 3191 3192 if ((width * pixel_width) < DMA_BT848_SPLIT ) { 3193 if ( width == cols) { 3194 flag = OP_SOL | OP_EOL; 3195 } else if (bktr->current_col == 0 ) { --- 6 unchanged lines hidden (view full) --- 3202 if (( flag & OP_SOL ) && ( start_skip > 0 )) { 3203 *(*dma_prog)++ = OP_SKIP | OP_SOL | start_skip; 3204 flag &= ~OP_SOL; 3205 skip = start_skip; 3206 } 3207 3208 *(*dma_prog)++ = operation | flag | (width * pixel_width - skip); 3209 if (operation != OP_SKIP ) | 3188 case 2 : start_skip = 4 ; break; 3189 case 1 : start_skip = 8 ; break; 3190 } 3191 3192 if ((width * pixel_width) < DMA_BT848_SPLIT ) { 3193 if ( width == cols) { 3194 flag = OP_SOL | OP_EOL; 3195 } else if (bktr->current_col == 0 ) { --- 6 unchanged lines hidden (view full) --- 3202 if (( flag & OP_SOL ) && ( start_skip > 0 )) { 3203 *(*dma_prog)++ = OP_SKIP | OP_SOL | start_skip; 3204 flag &= ~OP_SOL; 3205 skip = start_skip; 3206 } 3207 3208 *(*dma_prog)++ = operation | flag | (width * pixel_width - skip); 3209 if (operation != OP_SKIP ) |
| 3210 *(*dma_prog)++ = (uintptr_t) (void *) *target_buffer; | 3210 *(*dma_prog)++ = (uintptr_t) (volatile void *) *target_buffer; |
| 3211 3212 *target_buffer += width * pixel_width; 3213 bktr->current_col += width; 3214 3215 } else { 3216 3217 if (bktr->current_col == 0 && width == cols) { 3218 flag = OP_SOL ; --- 14 unchanged lines hidden (view full) --- 3233 *(*dma_prog)++ = OP_SKIP | OP_SOL | start_skip; 3234 flag &= ~OP_SOL; 3235 skip = start_skip; 3236 } 3237 3238 *(*dma_prog)++ = operation | flag | 3239 (width * pixel_width / 2 - skip); 3240 if (operation != OP_SKIP ) | 3211 3212 *target_buffer += width * pixel_width; 3213 bktr->current_col += width; 3214 3215 } else { 3216 3217 if (bktr->current_col == 0 && width == cols) { 3218 flag = OP_SOL ; --- 14 unchanged lines hidden (view full) --- 3233 *(*dma_prog)++ = OP_SKIP | OP_SOL | start_skip; 3234 flag &= ~OP_SOL; 3235 skip = start_skip; 3236 } 3237 3238 *(*dma_prog)++ = operation | flag | 3239 (width * pixel_width / 2 - skip); 3240 if (operation != OP_SKIP ) |
| 3241 *(*dma_prog)++ = (uintptr_t) (void *) *target_buffer ; | 3241 *(*dma_prog)++ = (uintptr_t) (volatile void *) *target_buffer ; |
| 3242 *target_buffer += (width * pixel_width / 2) ; 3243 3244 if ( operation == OP_WRITE ) 3245 operation = OP_WRITEC; 3246 *(*dma_prog)++ = operation | flag2 | 3247 (width * pixel_width / 2); 3248 *target_buffer += (width * pixel_width / 2) ; 3249 bktr->current_col += width; --- 2386 unchanged lines hidden --- | 3242 *target_buffer += (width * pixel_width / 2) ; 3243 3244 if ( operation == OP_WRITE ) 3245 operation = OP_WRITEC; 3246 *(*dma_prog)++ = operation | flag2 | 3247 (width * pixel_width / 2); 3248 *target_buffer += (width * pixel_width / 2) ; 3249 bktr->current_col += width; --- 2386 unchanged lines hidden --- |