2 * vpif - DM646x Video Port Interface driver
3 * VPIF is a receiver and transmitter for video data. It has two channels(0, 1)
4 * that receiveing video byte stream and two channels(2, 3) for video output.
5 * The hardware supports SDTV, HDTV formats, raw data capture.
6 * Currently, the driver supports NTSC and PAL standards.
8 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation version 2.
14 * This program is distributed .as is. WITHOUT ANY WARRANTY of any
15 * kind, whether express or implied; without even the implied warranty
16 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/spinlock.h>
24 #include <linux/kernel.h>
26 #include <mach/hardware.h>
30 MODULE_DESCRIPTION("TI DaVinci Video Port Interface driver");
31 MODULE_LICENSE("GPL");
33 #define VPIF_CH0_MAX_MODES (22)
34 #define VPIF_CH1_MAX_MODES (02)
35 #define VPIF_CH2_MAX_MODES (15)
36 #define VPIF_CH3_MAX_MODES (02)
38 static resource_size_t res_len;
39 static struct resource *res;
42 void __iomem *vpif_base;
45 * ch_params: video standard configuration parameters for vpif
46 * The table must include all presets from supported subdevices.
48 const struct vpif_channel_config_params ch_params[] = {
65 .dv_preset = V4L2_DV_480P59_94,
82 .dv_preset = V4L2_DV_576P50,
99 .dv_preset = V4L2_DV_720P50,
116 .dv_preset = V4L2_DV_720P60,
136 .dv_preset = V4L2_DV_1080I50,
156 .dv_preset = V4L2_DV_1080I60,
173 .dv_preset = V4L2_DV_1080P60,
195 .stdid = V4L2_STD_525_60,
198 .name = "PAL_BDGHIK",
215 .stdid = V4L2_STD_625_50,
219 const unsigned int vpif_ch_params_count = ARRAY_SIZE(ch_params);
221 static inline void vpif_wr_bit(u32 reg, u32 bit, u32 val)
224 vpif_set_bit(reg, bit);
226 vpif_clr_bit(reg, bit);
229 /* This structure is used to keep track of VPIF size register's offsets */
230 struct vpif_registers {
231 u32 h_cfg, v_cfg_00, v_cfg_01, v_cfg_02, v_cfg, ch_ctrl;
232 u32 line_offset, vanc0_strt, vanc0_size, vanc1_strt;
233 u32 vanc1_size, width_mask, len_mask;
237 static const struct vpif_registers vpifregs[VPIF_NUM_CHANNELS] = {
240 VPIF_CH0_H_CFG, VPIF_CH0_V_CFG_00, VPIF_CH0_V_CFG_01,
241 VPIF_CH0_V_CFG_02, VPIF_CH0_V_CFG_03, VPIF_CH0_CTRL,
242 VPIF_CH0_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
247 VPIF_CH1_H_CFG, VPIF_CH1_V_CFG_00, VPIF_CH1_V_CFG_01,
248 VPIF_CH1_V_CFG_02, VPIF_CH1_V_CFG_03, VPIF_CH1_CTRL,
249 VPIF_CH1_IMG_ADD_OFST, 0, 0, 0, 0, 0x1FFF, 0xFFF,
254 VPIF_CH2_H_CFG, VPIF_CH2_V_CFG_00, VPIF_CH2_V_CFG_01,
255 VPIF_CH2_V_CFG_02, VPIF_CH2_V_CFG_03, VPIF_CH2_CTRL,
256 VPIF_CH2_IMG_ADD_OFST, VPIF_CH2_VANC0_STRT, VPIF_CH2_VANC0_SIZE,
257 VPIF_CH2_VANC1_STRT, VPIF_CH2_VANC1_SIZE, 0x7FF, 0x7FF,
262 VPIF_CH3_H_CFG, VPIF_CH3_V_CFG_00, VPIF_CH3_V_CFG_01,
263 VPIF_CH3_V_CFG_02, VPIF_CH3_V_CFG_03, VPIF_CH3_CTRL,
264 VPIF_CH3_IMG_ADD_OFST, VPIF_CH3_VANC0_STRT, VPIF_CH3_VANC0_SIZE,
265 VPIF_CH3_VANC1_STRT, VPIF_CH3_VANC1_SIZE, 0x7FF, 0x7FF,
270 /* vpif_set_mode_info:
271 * This function is used to set horizontal and vertical config parameters
272 * As per the standard in the channel, configure the values of L1, L3,
273 * L5, L7 L9, L11 in VPIF Register , also write width and height
275 static void vpif_set_mode_info(const struct vpif_channel_config_params *config,
276 u8 channel_id, u8 config_channel_id)
280 value = (config->eav2sav & vpifregs[config_channel_id].width_mask);
281 value <<= VPIF_CH_LEN_SHIFT;
282 value |= (config->sav2eav & vpifregs[config_channel_id].width_mask);
283 regw(value, vpifregs[channel_id].h_cfg);
285 value = (config->l1 & vpifregs[config_channel_id].len_mask);
286 value <<= VPIF_CH_LEN_SHIFT;
287 value |= (config->l3 & vpifregs[config_channel_id].len_mask);
288 regw(value, vpifregs[channel_id].v_cfg_00);
290 value = (config->l5 & vpifregs[config_channel_id].len_mask);
291 value <<= VPIF_CH_LEN_SHIFT;
292 value |= (config->l7 & vpifregs[config_channel_id].len_mask);
293 regw(value, vpifregs[channel_id].v_cfg_01);
295 value = (config->l9 & vpifregs[config_channel_id].len_mask);
296 value <<= VPIF_CH_LEN_SHIFT;
297 value |= (config->l11 & vpifregs[config_channel_id].len_mask);
298 regw(value, vpifregs[channel_id].v_cfg_02);
300 value = (config->vsize & vpifregs[config_channel_id].len_mask);
301 regw(value, vpifregs[channel_id].v_cfg);
304 /* config_vpif_params
305 * Function to set the parameters of a channel
306 * Mainly modifies the channel ciontrol register
307 * It sets frame format, yc mux mode
309 static void config_vpif_params(struct vpif_params *vpifparams,
310 u8 channel_id, u8 found)
312 const struct vpif_channel_config_params *config = &vpifparams->std_info;
313 u32 value, ch_nip, reg;
318 end = channel_id + found;
320 for (i = start; i < end; i++) {
321 reg = vpifregs[i].ch_ctrl;
323 ch_nip = VPIF_CAPTURE_CH_NIP;
325 ch_nip = VPIF_DISPLAY_CH_NIP;
327 vpif_wr_bit(reg, ch_nip, config->frm_fmt);
328 vpif_wr_bit(reg, VPIF_CH_YC_MUX_BIT, config->ycmux_mode);
329 vpif_wr_bit(reg, VPIF_CH_INPUT_FIELD_FRAME_BIT,
330 vpifparams->video_params.storage_mode);
332 /* Set raster scanning SDR Format */
333 vpif_clr_bit(reg, VPIF_CH_SDR_FMT_BIT);
334 vpif_wr_bit(reg, VPIF_CH_DATA_MODE_BIT, config->capture_format);
336 if (channel_id > 1) /* Set the Pixel enable bit */
337 vpif_set_bit(reg, VPIF_DISPLAY_PIX_EN_BIT);
338 else if (config->capture_format) {
339 /* Set the polarity of various pins */
340 vpif_wr_bit(reg, VPIF_CH_FID_POLARITY_BIT,
341 vpifparams->iface.fid_pol);
342 vpif_wr_bit(reg, VPIF_CH_V_VALID_POLARITY_BIT,
343 vpifparams->iface.vd_pol);
344 vpif_wr_bit(reg, VPIF_CH_H_VALID_POLARITY_BIT,
345 vpifparams->iface.hd_pol);
349 value &= ((~(unsigned int)(0x3)) <<
350 VPIF_CH_DATA_WIDTH_BIT);
351 value |= ((vpifparams->params.data_sz) <<
352 VPIF_CH_DATA_WIDTH_BIT);
356 /* Write the pitch in the driver */
357 regw((vpifparams->video_params.hpitch),
358 vpifregs[i].line_offset);
362 /* vpif_set_video_params
363 * This function is used to set video parameters in VPIF register
365 int vpif_set_video_params(struct vpif_params *vpifparams, u8 channel_id)
367 const struct vpif_channel_config_params *config = &vpifparams->std_info;
370 vpif_set_mode_info(config, channel_id, channel_id);
371 if (!config->ycmux_mode) {
372 /* YC are on separate channels (HDTV formats) */
373 vpif_set_mode_info(config, channel_id + 1, channel_id);
377 config_vpif_params(vpifparams, channel_id, found);
379 regw(0x80, VPIF_REQ_SIZE);
380 regw(0x01, VPIF_EMULATION_CTRL);
384 EXPORT_SYMBOL(vpif_set_video_params);
386 void vpif_set_vbi_display_params(struct vpif_vbi_params *vbiparams,
391 value = 0x3F8 & (vbiparams->hstart0);
392 value |= 0x3FFFFFF & ((vbiparams->vstart0) << 16);
393 regw(value, vpifregs[channel_id].vanc0_strt);
395 value = 0x3F8 & (vbiparams->hstart1);
396 value |= 0x3FFFFFF & ((vbiparams->vstart1) << 16);
397 regw(value, vpifregs[channel_id].vanc1_strt);
399 value = 0x3F8 & (vbiparams->hsize0);
400 value |= 0x3FFFFFF & ((vbiparams->vsize0) << 16);
401 regw(value, vpifregs[channel_id].vanc0_size);
403 value = 0x3F8 & (vbiparams->hsize1);
404 value |= 0x3FFFFFF & ((vbiparams->vsize1) << 16);
405 regw(value, vpifregs[channel_id].vanc1_size);
408 EXPORT_SYMBOL(vpif_set_vbi_display_params);
410 int vpif_channel_getfid(u8 channel_id)
412 return (regr(vpifregs[channel_id].ch_ctrl) & VPIF_CH_FID_MASK)
413 >> VPIF_CH_FID_SHIFT;
415 EXPORT_SYMBOL(vpif_channel_getfid);
417 static int __init vpif_probe(struct platform_device *pdev)
421 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
425 res_len = res->end - res->start + 1;
427 res = request_mem_region(res->start, res_len, res->name);
431 vpif_base = ioremap(res->start, res_len);
437 spin_lock_init(&vpif_lock);
438 dev_info(&pdev->dev, "vpif probe success\n");
442 release_mem_region(res->start, res_len);
446 static int __devexit vpif_remove(struct platform_device *pdev)
449 release_mem_region(res->start, res_len);
453 static struct platform_driver vpif_driver = {
456 .owner = THIS_MODULE,
458 .remove = __devexit_p(vpif_remove),
462 static void vpif_exit(void)
464 platform_driver_unregister(&vpif_driver);
467 static int __init vpif_init(void)
469 return platform_driver_register(&vpif_driver);
471 subsys_initcall(vpif_init);
472 module_exit(vpif_exit);