diff options
Diffstat (limited to 'drivers/media/pci/tw686x')
| -rw-r--r-- | drivers/media/pci/tw686x/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/media/pci/tw686x/tw686x-audio.c | 92 | ||||
| -rw-r--r-- | drivers/media/pci/tw686x/tw686x-core.c | 56 | ||||
| -rw-r--r-- | drivers/media/pci/tw686x/tw686x-regs.h | 9 | ||||
| -rw-r--r-- | drivers/media/pci/tw686x/tw686x-video.c | 595 | ||||
| -rw-r--r-- | drivers/media/pci/tw686x/tw686x.h | 42 |
6 files changed, 612 insertions, 184 deletions
diff --git a/drivers/media/pci/tw686x/Kconfig b/drivers/media/pci/tw686x/Kconfig index fb8536974052..34ff37712313 100644 --- a/drivers/media/pci/tw686x/Kconfig +++ b/drivers/media/pci/tw686x/Kconfig @@ -3,6 +3,8 @@ config VIDEO_TW686X depends on PCI && VIDEO_DEV && VIDEO_V4L2 && SND depends on HAS_DMA select VIDEOBUF2_VMALLOC + select VIDEOBUF2_DMA_CONTIG + select VIDEOBUF2_DMA_SG select SND_PCM help Support for Intersil/Techwell TW686x-based frame grabber cards. diff --git a/drivers/media/pci/tw686x/tw686x-audio.c b/drivers/media/pci/tw686x/tw686x-audio.c index 91459ab715b2..96e444c49173 100644 --- a/drivers/media/pci/tw686x/tw686x-audio.c +++ b/drivers/media/pci/tw686x/tw686x-audio.c @@ -62,12 +62,22 @@ void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests, } spin_unlock_irqrestore(&ac->lock, flags); + if (!done || !next) + continue; + /* + * Checking for a non-nil dma_desc[pb]->virt buffer is + * the same as checking for memcpy DMA mode. + */ desc = &ac->dma_descs[pb]; - if (done && next && desc->virt) { - memcpy(done->virt, desc->virt, desc->size); - ac->ptr = done->dma - ac->buf[0].dma; - snd_pcm_period_elapsed(ac->ss); + if (desc->virt) { + memcpy(done->virt, desc->virt, + dev->period_size); + } else { + u32 reg = pb ? ADMA_B_ADDR[ch] : ADMA_P_ADDR[ch]; + reg_write(dev, reg, next->dma); } + ac->ptr = done->dma - ac->buf[0].dma; + snd_pcm_period_elapsed(ac->ss); } } @@ -83,10 +93,9 @@ static int tw686x_pcm_hw_free(struct snd_pcm_substream *ss) } /* - * The audio device rate is global and shared among all - * capture channels. The driver makes no effort to prevent - * rate modifications. User is free change the rate, but it - * means changing the rate for all capture sub-devices. + * Audio parameters are global and shared among all + * capture channels. The driver prevents changes to + * the parameters if any audio channel is capturing. */ static const struct snd_pcm_hardware tw686x_capture_hw = { .info = (SNDRV_PCM_INFO_MMAP | @@ -99,9 +108,9 @@ static const struct snd_pcm_hardware tw686x_capture_hw = { .rate_max = 48000, .channels_min = 1, .channels_max = 1, - .buffer_bytes_max = TW686X_AUDIO_PAGE_MAX * TW686X_AUDIO_PAGE_SZ, - .period_bytes_min = TW686X_AUDIO_PAGE_SZ, - .period_bytes_max = TW686X_AUDIO_PAGE_SZ, + .buffer_bytes_max = TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX, + .period_bytes_min = AUDIO_DMA_SIZE_MIN, + .period_bytes_max = AUDIO_DMA_SIZE_MAX, .periods_min = TW686X_AUDIO_PERIODS_MIN, .periods_max = TW686X_AUDIO_PERIODS_MAX, }; @@ -143,6 +152,14 @@ static int tw686x_pcm_prepare(struct snd_pcm_substream *ss) int i; spin_lock_irqsave(&dev->lock, flags); + /* + * Given the audio parameters are global (i.e. shared across + * DMA channels), we need to check new params are allowed. + */ + if (((dev->audio_rate != rt->rate) || + (dev->period_size != period_size)) && dev->audio_enabled) + goto err_audio_busy; + tw686x_disable_channel(dev, AUDIO_CHANNEL_OFFSET + ac->ch); spin_unlock_irqrestore(&dev->lock, flags); @@ -156,12 +173,21 @@ static int tw686x_pcm_prepare(struct snd_pcm_substream *ss) reg_write(dev, AUDIO_CONTROL2, reg); } - if (period_size != TW686X_AUDIO_PAGE_SZ || - rt->periods < TW686X_AUDIO_PERIODS_MIN || - rt->periods > TW686X_AUDIO_PERIODS_MAX) { - return -EINVAL; + if (dev->period_size != period_size) { + u32 reg; + + dev->period_size = period_size; + reg = reg_read(dev, AUDIO_CONTROL1); + reg &= ~(AUDIO_DMA_SIZE_MASK << AUDIO_DMA_SIZE_SHIFT); + reg |= period_size << AUDIO_DMA_SIZE_SHIFT; + + reg_write(dev, AUDIO_CONTROL1, reg); } + if (rt->periods < TW686X_AUDIO_PERIODS_MIN || + rt->periods > TW686X_AUDIO_PERIODS_MAX) + return -EINVAL; + spin_lock_irqsave(&ac->lock, flags); INIT_LIST_HEAD(&ac->buf_list); @@ -181,9 +207,19 @@ static int tw686x_pcm_prepare(struct snd_pcm_substream *ss) ac->curr_bufs[0] = p_buf; ac->curr_bufs[1] = b_buf; ac->ptr = 0; + + if (dev->dma_mode != TW686X_DMA_MODE_MEMCPY) { + reg_write(dev, ADMA_P_ADDR[ac->ch], p_buf->dma); + reg_write(dev, ADMA_B_ADDR[ac->ch], b_buf->dma); + } + spin_unlock_irqrestore(&ac->lock, flags); return 0; + +err_audio_busy: + spin_unlock_irqrestore(&dev->lock, flags); + return -EBUSY; } static int tw686x_pcm_trigger(struct snd_pcm_substream *ss, int cmd) @@ -197,6 +233,7 @@ static int tw686x_pcm_trigger(struct snd_pcm_substream *ss, int cmd) case SNDRV_PCM_TRIGGER_START: if (ac->curr_bufs[0] && ac->curr_bufs[1]) { spin_lock_irqsave(&dev->lock, flags); + dev->audio_enabled = 1; tw686x_enable_channel(dev, AUDIO_CHANNEL_OFFSET + ac->ch); spin_unlock_irqrestore(&dev->lock, flags); @@ -209,6 +246,7 @@ static int tw686x_pcm_trigger(struct snd_pcm_substream *ss, int cmd) break; case SNDRV_PCM_TRIGGER_STOP: spin_lock_irqsave(&dev->lock, flags); + dev->audio_enabled = 0; tw686x_disable_channel(dev, AUDIO_CHANNEL_OFFSET + ac->ch); spin_unlock_irqrestore(&dev->lock, flags); @@ -266,8 +304,8 @@ static int tw686x_snd_pcm_init(struct tw686x_dev *dev) return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(dev->pci_dev), - TW686X_AUDIO_PAGE_MAX * TW686X_AUDIO_PAGE_SZ, - TW686X_AUDIO_PAGE_MAX * TW686X_AUDIO_PAGE_SZ); + TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX, + TW686X_AUDIO_PAGE_MAX * AUDIO_DMA_SIZE_MAX); } static void tw686x_audio_dma_free(struct tw686x_dev *dev, @@ -290,11 +328,19 @@ static int tw686x_audio_dma_alloc(struct tw686x_dev *dev, { int pb; + /* + * In the memcpy DMA mode we allocate a consistent buffer + * and use it for the DMA capture. Otherwise, DMA + * acts on the ALSA buffers as received in pcm_prepare. + */ + if (dev->dma_mode != TW686X_DMA_MODE_MEMCPY) + return 0; + for (pb = 0; pb < 2; pb++) { u32 reg = pb ? ADMA_B_ADDR[ac->ch] : ADMA_P_ADDR[ac->ch]; void *virt; - virt = pci_alloc_consistent(dev->pci_dev, TW686X_AUDIO_PAGE_SZ, + virt = pci_alloc_consistent(dev->pci_dev, AUDIO_DMA_SIZE_MAX, &ac->dma_descs[pb].phys); if (!virt) { dev_err(&dev->pci_dev->dev, @@ -303,7 +349,7 @@ static int tw686x_audio_dma_alloc(struct tw686x_dev *dev, return -ENOMEM; } ac->dma_descs[pb].virt = virt; - ac->dma_descs[pb].size = TW686X_AUDIO_PAGE_SZ; + ac->dma_descs[pb].size = AUDIO_DMA_SIZE_MAX; reg_write(dev, reg, ac->dma_descs[pb].phys); } return 0; @@ -334,12 +380,8 @@ int tw686x_audio_init(struct tw686x_dev *dev) struct snd_card *card; int err, ch; - /* - * AUDIO_CONTROL1 - * DMA byte length [31:19] = 4096 (i.e. ALSA period) - * External audio enable [0] = enabled - */ - reg_write(dev, AUDIO_CONTROL1, 0x80000001); + /* Enable external audio */ + reg_write(dev, AUDIO_CONTROL1, BIT(0)); err = snd_card_new(&pci_dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, diff --git a/drivers/media/pci/tw686x/tw686x-core.c b/drivers/media/pci/tw686x/tw686x-core.c index cf53b0e97be2..71a0453b1af1 100644 --- a/drivers/media/pci/tw686x/tw686x-core.c +++ b/drivers/media/pci/tw686x/tw686x-core.c @@ -21,12 +21,14 @@ * under stress testings it has been found that the machine can * freeze completely if DMA registers are programmed while streaming * is active. - * This driver tries to access hardware registers as infrequently - * as possible by: - * i. allocating fixed DMA buffers and memcpy'ing into - * vmalloc'ed buffers - * ii. using a timer to mitigate the rate of DMA reset operations, - * on DMA channels error. + * + * Therefore, driver implements a dma_mode called 'memcpy' which + * avoids cycling the DMA buffers, and insteads allocates extra DMA buffers + * and then copies into vmalloc'ed user buffers. + * + * In addition to this, when streaming is on, the driver tries to access + * hardware registers as infrequently as possible. This is done by using + * a timer to limit the rate at which DMA is reset on DMA channels error. */ #include <linux/init.h> @@ -55,6 +57,42 @@ static u32 dma_interval = 0x00098968; module_param(dma_interval, int, 0444); MODULE_PARM_DESC(dma_interval, "Minimum time span for DMA interrupting host"); +static unsigned int dma_mode = TW686X_DMA_MODE_MEMCPY; +static const char *dma_mode_name(unsigned int mode) +{ + switch (mode) { + case TW686X_DMA_MODE_MEMCPY: + return "memcpy"; + case TW686X_DMA_MODE_CONTIG: + return "contig"; + case TW686X_DMA_MODE_SG: + return "sg"; + default: + return "unknown"; + } +} + +static int tw686x_dma_mode_get(char *buffer, struct kernel_param *kp) +{ + return sprintf(buffer, dma_mode_name(dma_mode)); +} + +static int tw686x_dma_mode_set(const char *val, struct kernel_param *kp) +{ + if (!strcasecmp(val, dma_mode_name(TW686X_DMA_MODE_MEMCPY))) + dma_mode = TW686X_DMA_MODE_MEMCPY; + else if (!strcasecmp(val, dma_mode_name(TW686X_DMA_MODE_CONTIG))) + dma_mode = TW686X_DMA_MODE_CONTIG; + else if (!strcasecmp(val, dma_mode_name(TW686X_DMA_MODE_SG))) + dma_mode = TW686X_DMA_MODE_SG; + else + return -EINVAL; + return 0; +} +module_param_call(dma_mode, tw686x_dma_mode_set, tw686x_dma_mode_get, + &dma_mode, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(dma_mode, "DMA operation mode (memcpy/contig/sg, default=memcpy)"); + void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel) { u32 dma_en = reg_read(dev, DMA_CHANNEL_ENABLE); @@ -212,6 +250,7 @@ static int tw686x_probe(struct pci_dev *pci_dev, if (!dev) return -ENOMEM; dev->type = pci_id->driver_data; + dev->dma_mode = dma_mode; sprintf(dev->name, "tw%04X", pci_dev->device); dev->video_channels = kcalloc(max_channels(dev), @@ -228,9 +267,10 @@ static int tw686x_probe(struct pci_dev *pci_dev, goto free_video; } - pr_info("%s: PCI %s, IRQ %d, MMIO 0x%lx\n", dev->name, + pr_info("%s: PCI %s, IRQ %d, MMIO 0x%lx (%s mode)\n", dev->name, pci_name(pci_dev), pci_dev->irq, - (unsigned long)pci_resource_start(pci_dev, 0)); + (unsigned long)pci_resource_start(pci_dev, 0), + dma_mode_name(dma_mode)); dev->pci_dev = pci_dev; if (pci_enable_device(pci_dev)) { diff --git a/drivers/media/pci/tw686x/tw686x-regs.h b/drivers/media/pci/tw686x/tw686x-regs.h index fcef586a4c8c..15a956642ef4 100644 --- a/drivers/media/pci/tw686x/tw686x-regs.h +++ b/drivers/media/pci/tw686x/tw686x-regs.h @@ -105,6 +105,10 @@ 0x2d0, 0x2d1, 0x2d2, 0x2d3 }) #define SYS_MODE_DMA_SHIFT 13 +#define AUDIO_DMA_SIZE_SHIFT 19 +#define AUDIO_DMA_SIZE_MIN SZ_512 +#define AUDIO_DMA_SIZE_MAX SZ_4K +#define AUDIO_DMA_SIZE_MASK (SZ_8K - 1) #define DMA_CMD_ENABLE BIT(31) #define INT_STATUS_DMA_TOUT BIT(17) @@ -119,4 +123,9 @@ #define TW686X_STD_PAL_CN 5 #define TW686X_STD_PAL_60 6 +#define TW686X_FIELD_MODE 0x3 +#define TW686X_FRAME_MODE 0x2 +/* 0x1 is reserved */ +#define TW686X_SG_MODE 0x0 + #define TW686X_FIFO_ERROR(x) (x & ~(0xff)) diff --git a/drivers/media/pci/tw686x/tw686x-video.c b/drivers/media/pci/tw686x/tw686x-video.c index 253e10823ba3..cdb16de770fe 100644 --- a/drivers/media/pci/tw686x/tw686x-video.c +++ b/drivers/media/pci/tw686x/tw686x-video.c @@ -19,6 +19,8 @@ #include <linux/slab.h> #include <media/v4l2-common.h> #include <media/v4l2-event.h> +#include <media/videobuf2-dma-contig.h> +#include <media/videobuf2-dma-sg.h> #include <media/videobuf2-vmalloc.h> #include "tw686x.h" #include "tw686x-regs.h" @@ -26,6 +28,11 @@ #define TW686X_INPUTS_PER_CH 4 #define TW686X_VIDEO_WIDTH 720 #define TW686X_VIDEO_HEIGHT(id) ((id & V4L2_STD_525_60) ? 480 : 576) +#define TW686X_MAX_FPS(id) ((id & V4L2_STD_525_60) ? 30 : 25) + +#define TW686X_MAX_SG_ENTRY_SIZE 4096 +#define TW686X_MAX_SG_DESC_COUNT 256 /* PAL 720x576 needs 203 4-KB pages */ +#define TW686X_SG_TABLE_SIZE (TW686X_MAX_SG_DESC_COUNT * sizeof(struct tw686x_sg_desc)) static const struct tw686x_format formats[] = { { @@ -43,53 +50,367 @@ static const struct tw686x_format formats[] = { } }; -static unsigned int tw686x_fields_map(v4l2_std_id std, unsigned int fps) +static void tw686x_buf_done(struct tw686x_video_channel *vc, + unsigned int pb) { - static const unsigned int map[15] = { - 0x00000000, 0x00000001, 0x00004001, 0x00104001, 0x00404041, - 0x01041041, 0x01104411, 0x01111111, 0x04444445, 0x04511445, - 0x05145145, 0x05151515, 0x05515455, 0x05551555, 0x05555555 - }; + struct tw686x_dma_desc *desc = &vc->dma_descs[pb]; + struct tw686x_dev *dev = vc->dev; + struct vb2_v4l2_buffer *vb; + struct vb2_buffer *vb2_buf; - static const unsigned int std_625_50[26] = { - 0, 1, 1, 2, 3, 3, 4, 4, 5, 5, 6, 7, 7, - 8, 8, 9, 10, 10, 11, 11, 12, 13, 13, 14, 14, 0 - }; + if (vc->curr_bufs[pb]) { + vb = &vc->curr_bufs[pb]->vb; - static const unsigned int std_525_60[31] = { - 0, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, - 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 0, 0 - }; + vb->field = dev->dma_ops->field; + vb->sequence = vc->sequence++; + vb2_buf = &vb->vb2_buf; - unsigned int i; + if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY) + memcpy(vb2_plane_vaddr(vb2_buf, 0), desc->virt, + desc->size); + vb2_buf->timestamp = ktime_get_ns(); + vb2_buffer_done(vb2_buf, VB2_BUF_STATE_DONE); + } + + vc->pb = !pb; +} + +/* + * We can call this even when alloc_dma failed for the given channel + */ +static void tw686x_memcpy_dma_free(struct tw686x_video_channel *vc, + unsigned int pb) +{ + struct tw686x_dma_desc *desc = &vc->dma_descs[pb]; + struct tw686x_dev *dev = vc->dev; + struct pci_dev *pci_dev; + unsigned long flags; + + /* Check device presence. Shouldn't really happen! */ + spin_lock_irqsave(&dev->lock, flags); + pci_dev = dev->pci_dev; + spin_unlock_irqrestore(&dev->lock, flags); + if (!pci_dev) { + WARN(1, "trying to deallocate on missing device\n"); + return; + } + + if (desc->virt) { + pci_free_consistent(dev->pci_dev, desc->size, + desc->virt, desc->phys); + desc->virt = NULL; + } +} + +static int tw686x_memcpy_dma_alloc(struct tw686x_video_channel *vc, + unsigned int pb) +{ + struct tw686x_dev *dev = vc->dev; + u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch]; + unsigned int len; + void *virt; + + WARN(vc->dma_descs[pb].virt, + "Allocating buffer but previous still here\n"); + + len = (vc->width * vc->height * vc->format->depth) >> 3; + virt = pci_alloc_consistent(dev->pci_dev, len, + &vc->dma_descs[pb].phys); + if (!virt) { + v4l2_err(&dev->v4l2_dev, + "dma%d: unable to allocate %s-buffer\n", + vc->ch, pb ? "B" : "P"); + return -ENOMEM; + } + vc->dma_descs[pb].size = len; + vc->dma_descs[pb].virt = virt; + reg_write(dev, reg, vc->dma_descs[pb].phys); + + return 0; +} + +static void tw686x_memcpy_buf_refill(struct tw686x_video_channel *vc, + unsigned int pb) +{ + struct tw686x_v4l2_buf *buf; + + while (!list_empty(&vc->vidq_queued)) { + + buf = list_first_entry(&vc->vidq_queued, + struct tw686x_v4l2_buf, list); + list_del(&buf->list); + + vc->curr_bufs[pb] = buf; + return; + } + vc->curr_bufs[pb] = NULL; +} - if (std & V4L2_STD_525_60) { - if (fps >= ARRAY_SIZE(std_525_60)) - fps = 30; - i = std_525_60[fps]; +static const struct tw686x_dma_ops memcpy_dma_ops = { + .alloc = tw686x_memcpy_dma_alloc, + .free = tw686x_memcpy_dma_free, + .buf_refill = tw686x_memcpy_buf_refill, + .mem_ops = &vb2_vmalloc_memops, + .hw_dma_mode = TW686X_FRAME_MODE, + .field = V4L2_FIELD_INTERLACED, +}; + +static void tw686x_contig_buf_refill(struct tw686x_video_channel *vc, + unsigned int pb) +{ + struct tw686x_v4l2_buf *buf; + + while (!list_empty(&vc->vidq_queued)) { + u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch]; + dma_addr_t phys; + + buf = list_first_entry(&vc->vidq_queued, + struct tw686x_v4l2_buf, list); + list_del(&buf->list); + + phys = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); + reg_write(vc->dev, reg, phys); + + buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE; + vc->curr_bufs[pb] = buf; + return; + } + vc->curr_bufs[pb] = NULL; +} + +static const struct tw686x_dma_ops contig_dma_ops = { + .buf_refill = tw686x_contig_buf_refill, + .mem_ops = &vb2_dma_contig_memops, + .hw_dma_mode = TW686X_FRAME_MODE, + .field = V4L2_FIELD_INTERLACED, +}; + +static int tw686x_sg_desc_fill(struct tw686x_sg_desc *descs, + struct tw686x_v4l2_buf *buf, + unsigned int buf_len) +{ + struct sg_table *vbuf = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0); + unsigned int len, entry_len; + struct scatterlist *sg; + int i, count; + + /* Clear the scatter-gather table */ + memset(descs, 0, TW686X_SG_TABLE_SIZE); + + count = 0; + for_each_sg(vbuf->sgl, sg, vbuf->nents, i) { + dma_addr_t phys = sg_dma_address(sg); + len = sg_dma_len(sg); + + while (len && buf_len) { + + if (count == TW686X_MAX_SG_DESC_COUNT) + return -ENOMEM; + + entry_len = min_t(unsigned int, len, + TW686X_MAX_SG_ENTRY_SIZE); + entry_len = min_t(unsigned int, entry_len, buf_len); + descs[count].phys = cpu_to_le32(phys); + descs[count++].flags_length = + cpu_to_le32(BIT(30) | entry_len); + phys += entry_len; + len -= entry_len; + buf_len -= entry_len; + } + + if (!buf_len) + return 0; + } + + return -ENOMEM; +} + +static void tw686x_sg_buf_refill(struct tw686x_video_channel *vc, + unsigned int pb) +{ + struct tw686x_dev *dev = vc->dev; + struct tw686x_v4l2_buf *buf; + + while (!list_empty(&vc->vidq_queued)) { + unsigned int buf_len; + + buf = list_first_entry(&vc->vidq_queued, + struct tw686x_v4l2_buf, list); + list_del(&buf->list); + + buf_len = (vc->width * vc->height * vc->format->depth) >> 3; + if (tw686x_sg_desc_fill(vc->sg_descs[pb], buf, buf_len)) { + v4l2_err(&dev->v4l2_dev, + "dma%d: unable to fill %s-buffer\n", + vc->ch, pb ? "B" : "P"); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + continue; + } + + buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE; + vc->curr_bufs[pb] = buf; + return; + } + + vc->curr_bufs[pb] = NULL; +} + +static void tw686x_sg_dma_free(struct tw686x_video_channel *vc, + unsigned int pb) +{ + struct tw686x_dma_desc *desc = &vc->dma_descs[pb]; + struct tw686x_dev *dev = vc->dev; + + if (desc->size) { + pci_free_consistent(dev->pci_dev, desc->size, + desc->virt, desc->phys); + desc->virt = NULL; + } + + vc->sg_descs[pb] = NULL; +} + +static int tw686x_sg_dma_alloc(struct tw686x_video_channel *vc, + unsigned int pb) +{ + struct tw686x_dma_desc *desc = &vc->dma_descs[pb]; + struct tw686x_dev *dev = vc->dev; + u32 reg = pb ? DMA_PAGE_TABLE1_ADDR[vc->ch] : + DMA_PAGE_TABLE0_ADDR[vc->ch]; + void *virt; + + if (desc->size) { + + virt = pci_alloc_consistent(dev->pci_dev, desc->size, + &desc->phys); + if (!virt) { + v4l2_err(&dev->v4l2_dev, + "dma%d: unable to allocate %s-buffer\n", + vc->ch, pb ? "B" : "P"); + return -ENOMEM; + } + desc->virt = virt; + reg_write(dev, reg, desc->phys); } else { - if (fps >= ARRAY_SIZE(std_625_50)) - fps = 25; - i = std_625_50[fps]; + virt = dev->video_channels[0].dma_descs[pb].virt + + vc->ch * TW686X_SG_TABLE_SIZE; } - return map[i]; + vc->sg_descs[pb] = virt; + return 0; +} + +static int tw686x_sg_setup(struct tw686x_dev *dev) +{ + unsigned int sg_table_size, pb, ch, channels; + + if (is_second_gen(dev)) { + /* + * TW6865/TW6869: each channel needs a pair of + * P-B descriptor tables. + */ + channels = max_channels(dev); + sg_table_size = TW686X_SG_TABLE_SIZE; + } else { + /* + * TW6864/TW6868: we need to allocate a pair of + * P-B descriptor tables, common for all channels. + * Each table will be bigger than 4 KB. + */ + channels = 1; + sg_table_size = max_channels(dev) * TW686X_SG_TABLE_SIZE; + } + + for (ch = 0; ch < channels; ch++) { + struct tw686x_video_channel *vc = &dev->video_channels[ch]; + + for (pb = 0; pb < 2; pb++) + vc->dma_descs[pb].size = sg_table_size; + } + + return 0; +} + +static const struct tw686x_dma_ops sg_dma_ops = { + .setup = tw686x_sg_setup, + .alloc = tw686x_sg_dma_alloc, + .free = tw686x_sg_dma_free, + .buf_refill = tw686x_sg_buf_refill, + .mem_ops = &vb2_dma_sg_memops, + .hw_dma_mode = TW686X_SG_MODE, + .field = V4L2_FIELD_SEQ_TB, +}; + +static const unsigned int fps_map[15] = { + /* + * bit 31 enables selecting the field control register + * bits 0-29 are a bitmask with fields that will be output. + * For NTSC (and PAL-M, PAL-60), all 30 bits are used. + * For other PAL standards, only the first 25 bits are used. + */ + 0x00000000, /* output all fields */ + 0x80000006, /* 2 fps (60Hz), 2 fps (50Hz) */ + 0x80018006, /* 4 fps (60Hz), 4 fps (50Hz) */ + 0x80618006, /* 6 fps (60Hz), 6 fps (50Hz) */ + 0x81818186, /* 8 fps (60Hz), 8 fps (50Hz) */ + 0x86186186, /* 10 fps (60Hz), 8 fps (50Hz) */ + 0x86619866, /* 12 fps (60Hz), 10 fps (50Hz) */ + 0x86666666, /* 14 fps (60Hz), 12 fps (50Hz) */ + 0x9999999e, /* 16 fps (60Hz), 14 fps (50Hz) */ + 0x99e6799e, /* 18 fps (60Hz), 16 fps (50Hz) */ + 0x9e79e79e, /* 20 fps (60Hz), 16 fps (50Hz) */ + 0x9e7e7e7e, /* 22 fps (60Hz), 18 fps (50Hz) */ + 0x9fe7f9fe, /* 24 fps (60Hz), 20 fps (50Hz) */ + 0x9ffe7ffe, /* 26 fps (60Hz), 22 fps (50Hz) */ + 0x9ffffffe, /* 28 fps (60Hz), 24 fps (50Hz) */ +}; + +static unsigned int tw686x_real_fps(unsigned int index, unsigned int max_fps) +{ + unsigned long mask; + + if (!index || index >= ARRAY_SIZE(fps_map)) + return max_fps; + + mask = GENMASK(max_fps - 1, 0); + return hweight_long(fps_map[index] & mask); +} + +static unsigned int tw686x_fps_idx(unsigned int fps, unsigned int max_fps) +{ + unsigned int idx, real_fps; + int delta; + + /* First guess */ + idx = (12 + 15 * fps) / max_fps; + + /* Minimal possible framerate is 2 frames per second */ + if (!idx) + return 1; + + /* Check if the difference is bigger than abs(1) and adjust */ + real_fps = tw686x_real_fps(idx, max_fps); + delta = real_fps - fps; + if (delta < -1) + idx++; + else if (delta > 1) + idx--; + + /* Max framerate */ + if (idx >= 15) + return 0; + + return idx; } static void tw686x_set_framerate(struct tw686x_video_channel *vc, unsigned int fps) { - unsigned int map; - - if (vc->fps == fps) - return; + unsigned int i; - map = tw686x_fields_map(vc->video_standard, fps) << 1; - map |= map << 1; - if (map > 0) - map |= BIT(31); - reg_write(vc->dev, VIDEO_FIELD_CTRL[vc->ch], map); - vc->fps = fps; + i = tw686x_fps_idx(fps, TW686X_MAX_FPS(vc->video_standard)); + reg_write(vc->dev, VIDEO_FIELD_CTRL[vc->ch], fps_map[i]); + vc->fps = tw686x_real_fps(i, TW686X_MAX_FPS(vc->video_standard)); } static const struct tw686x_format *format_by_fourcc(unsigned int fourcc) @@ -104,7 +425,7 @@ static const struct tw686x_format *format_by_fourcc(unsigned int fourcc) static int tw686x_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, - unsigned int sizes[], void *alloc_ctxs[]) + unsigned int sizes[], struct device *alloc_devs[]) { struct tw686x_video_channel *vc = vb2_get_drv_priv(vq); unsigned int szimage = @@ -152,75 +473,6 @@ static void tw686x_buf_queue(struct vb2_buffer *vb) spin_unlock_irqrestore(&vc->qlock, flags); } -/* - * We can call this even when alloc_dma failed for the given channel - */ -static void tw686x_free_dma(struct tw686x_video_channel *vc, unsigned int pb) -{ - struct tw686x_dma_desc *desc = &vc->dma_descs[pb]; - struct tw686x_dev *dev = vc->dev; - struct pci_dev *pci_dev; - unsigned long flags; - - /* Check device presence. Shouldn't really happen! */ - spin_lock_irqsave(&dev->lock, flags); - pci_dev = dev->pci_dev; - spin_unlock_irqrestore(&dev->lock, flags); - if (!pci_dev) { - WARN(1, "trying to deallocate on missing device\n"); - return; - } - - if (desc->virt) { - pci_free_consistent(dev->pci_dev, desc->size, - desc->virt, desc->phys); - desc->virt = NULL; - } -} - -static int tw686x_alloc_dma(struct tw686x_video_channel *vc, unsigned int pb) -{ - struct tw686x_dev *dev = vc->dev; - u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch]; - unsigned int len; - void *virt; - - WARN(vc->dma_descs[pb].virt, - "Allocating buffer but previous still here\n"); - - len = (vc->width * vc->height * vc->format->depth) >> 3; - virt = pci_alloc_consistent(dev->pci_dev, len, - &vc->dma_descs[pb].phys); - if (!virt) { - v4l2_err(&dev->v4l2_dev, - "dma%d: unable to allocate %s-buffer\n", - vc->ch, pb ? "B" : "P"); - return -ENOMEM; - } - vc->dma_descs[pb].size = len; - vc->dma_descs[pb].virt = virt; - reg_write(dev, reg, vc->dma_descs[pb].phys); - - return 0; -} - -static void tw686x_buffer_refill(struct tw686x_video_channel *vc, - unsigned int pb) -{ - struct tw686x_v4l2_buf *buf; - - while (!list_empty(&vc->vidq_queued)) { - - buf = list_first_entry(&vc->vidq_queued, - struct tw686x_v4l2_buf, list); - list_del(&buf->list); - - vc->curr_bufs[pb] = buf; - return; - } - vc->curr_bufs[pb] = NULL; -} - static void tw686x_clear_queue(struct tw686x_video_channel *vc, enum vb2_buffer_state state) { @@ -262,7 +514,8 @@ static int tw686x_start_streaming(struct vb2_queue *vq, unsigned int count) spin_lock_irqsave(&vc->qlock, flags); /* Sanity check */ - if (!vc->dma_descs[0].virt || !vc->dma_descs[1].virt) { + if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY && + (!vc->dma_descs[0].virt || !vc->dma_descs[1].virt)) { spin_unlock_irqrestore(&vc->qlock, flags); v4l2_err(&dev->v4l2_dev, "video%d: refusing to start without DMA buffers\n", @@ -272,7 +525,7 @@ static int tw686x_start_streaming(struct vb2_queue *vq, unsigned int count) } for (pb = 0; pb < 2; pb++) - tw686x_buffer_refill(vc, pb); + dev->dma_ops->buf_refill(vc, pb); spin_unlock_irqrestore(&vc->qlock, flags); vc->sequence = 0; @@ -375,10 +628,11 @@ static int tw686x_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct tw686x_video_channel *vc = video_drvdata(file); + struct tw686x_dev *dev = vc->dev; f->fmt.pix.width = vc->width; f->fmt.pix.height = vc->height; - f->fmt.pix.field = V4L2_FIELD_INTERLACED; + f->fmt.pix.field = dev->dma_ops->field; f->fmt.pix.pixelformat = vc->format->fourcc; f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; f->fmt.pix.bytesperline = (f->fmt.pix.width * vc->format->depth) / 8; @@ -390,6 +644,7 @@ static int tw686x_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct tw686x_video_channel *vc = video_drvdata(file); + struct tw686x_dev *dev = vc->dev; unsigned int video_height = TW686X_VIDEO_HEIGHT(vc->video_standard); const struct tw686x_format *format; @@ -412,7 +667,7 @@ static int tw686x_try_fmt_vid_cap(struct file *file, void *priv, f->fmt.pix.bytesperline = (f->fmt.pix.width * format->depth) / 8; f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; - f->fmt.pix.field = V4L2_FIELD_INTERLACED; + f->fmt.pix.field = dev->dma_ops->field; return 0; } @@ -421,6 +676,7 @@ static int tw686x_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { struct tw686x_video_channel *vc = video_drvdata(file); + struct tw686x_dev *dev = vc->dev; u32 val, width, line_width, height; unsigned long bitsperframe; int err, pb; @@ -438,15 +694,16 @@ static int tw686x_s_fmt_vid_cap(struct file *file, void *priv, vc->height = f->fmt.pix.height; /* We need new DMA buffers if the framesize has changed */ - if (bitsperframe != vc->width * vc->height * vc->format->depth) { + if (dev->dma_ops->alloc && + bitsperframe != vc->width * vc->height * vc->format->depth) { for (pb = 0; pb < 2; pb++) - tw686x_free_dma(vc, pb); + dev->dma_ops->free(vc, pb); for (pb = 0; pb < 2; pb++) { - err = tw686x_alloc_dma(vc, pb); + err = dev->dma_ops->alloc(vc, pb); if (err) { if (pb > 0) - tw686x_free_dma(vc, 0); + dev->dma_ops->free(vc, 0); return err; } } @@ -464,6 +721,19 @@ static int tw686x_s_fmt_vid_cap(struct file *file, void *priv, else val &= ~BIT(24); + val &= ~0x7ffff; + + /* Program the DMA scatter-gather */ + if (dev->dma_mode == TW686X_DMA_MODE_SG) { + u32 start_idx, end_idx; + + start_idx = is_second_gen(dev) ? + 0 : vc->ch * TW686X_MAX_SG_DESC_COUNT; + end_idx = start_idx + TW686X_MAX_SG_DESC_COUNT - 1; + + val |= (end_idx << 10) | start_idx; + } + val &= ~(0x7 << 20); val |= vc->format->mode << 20; reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val); @@ -540,6 +810,12 @@ static int tw686x_s_std(struct file *file, void *priv, v4l2_std_id id) ret = tw686x_g_fmt_vid_cap(file, priv, &f); if (!ret) tw686x_s_fmt_vid_cap(file, priv, &f); + + /* + * Frame decimation depends on the chosen standard, + * so reset it to the current value. + */ + tw686x_set_framerate(vc, vc->fps); return 0; } @@ -609,6 +885,40 @@ static int tw686x_g_std(struct file *file, void *priv, v4l2_std_id *id) return 0; } +static int tw686x_g_parm(struct file *file, void *priv, + struct v4l2_streamparm *sp) +{ + struct tw686x_video_channel *vc = video_drvdata(file); + struct v4l2_captureparm *cp = &sp->parm.capture; + + if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + sp->parm.capture.readbuffers = 3; + + cp->capability = V4L2_CAP_TIMEPERFRAME; + cp->timeperframe.numerator = 1; + cp->timeperframe.denominator = vc->fps; + return 0; +} + +static int tw686x_s_parm(struct file *file, void *priv, + struct v4l2_streamparm *sp) +{ + struct tw686x_video_channel *vc = video_drvdata(file); + struct v4l2_captureparm *cp = &sp->parm.capture; + unsigned int denominator = cp->timeperframe.denominator; + unsigned int numerator = cp->timeperframe.numerator; + unsigned int fps; + + if (vb2_is_busy(&vc->vidq)) + return -EBUSY; + + fps = (!numerator || !denominator) ? 0 : denominator / numerator; + if (vc->fps != fps) + tw686x_set_framerate(vc, fps); + return tw686x_g_parm(file, priv, sp); +} + static int tw686x_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { @@ -695,6 +1005,9 @@ static const struct v4l2_ioctl_ops tw686x_video_ioctl_ops = { .vidioc_g_std = tw686x_g_std, .vidioc_s_std = tw686x_s_std, + .vidioc_g_parm = tw686x_g_parm, + .vidioc_s_parm = tw686x_s_parm, + .vidioc_enum_input = tw686x_enum_input, .vidioc_g_input = tw686x_g_input, .vidioc_s_input = tw686x_s_input, @@ -713,26 +1026,11 @@ static const struct v4l2_ioctl_ops tw686x_video_ioctl_ops = { .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; -static void tw686x_buffer_copy(struct tw686x_video_channel *vc, - unsigned int pb, struct vb2_v4l2_buffer *vb) -{ - struct tw686x_dma_desc *desc = &vc->dma_descs[pb]; - struct vb2_buffer *vb2_buf = &vb->vb2_buf; - - vb->field = V4L2_FIELD_INTERLACED; - vb->sequence = vc->sequence++; - - memcpy(vb2_plane_vaddr(vb2_buf, 0), desc->virt, desc->size); - vb2_buf->timestamp = ktime_get_ns(); - vb2_buffer_done(vb2_buf, VB2_BUF_STATE_DONE); -} - void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests, unsigned int pb_status, unsigned int fifo_status, unsigned int *reset_ch) { struct tw686x_video_channel *vc; - struct vb2_v4l2_buffer *vb; unsigned long flags; unsigned int ch, pb; @@ -781,14 +1079,9 @@ void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests, continue; } - /* handle video stream */ spin_lock_irqsave(&vc->qlock, flags); - if (vc->curr_bufs[pb]) { - vb = &vc->curr_bufs[pb]->vb; - tw686x_buffer_copy(vc, pb, vb); - } - vc->pb = !pb; - tw686x_buffer_refill(vc, pb); + tw686x_buf_done(vc, pb); + dev->dma_ops->buf_refill(vc, pb); spin_unlock_irqrestore(&vc->qlock, flags); } } @@ -803,8 +1096,9 @@ void tw686x_video_free(struct tw686x_dev *dev) if (vc->device) video_unregister_device(vc->device); - for (pb = 0; pb < 2; pb++) - tw686x_free_dma(vc, pb); + if (dev->dma_ops->free) + for (pb = 0; pb < 2; pb++) + dev->dma_ops->free(vc, pb); } } @@ -813,10 +1107,25 @@ int tw686x_video_init(struct tw686x_dev *dev) unsigned int ch, val, pb; int err; + if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY) + dev->dma_ops = &memcpy_dma_ops; + else if (dev->dma_mode == TW686X_DMA_MODE_CONTIG) + dev->dma_ops = &contig_dma_ops; + else if (dev->dma_mode == TW686X_DMA_MODE_SG) + dev->dma_ops = &sg_dma_ops; + else + return -EINVAL; + err = v4l2_device_register(&dev->pci_dev->dev, &dev->v4l2_dev); if (err) return err; + if (dev->dma_ops->setup) { + err = dev->dma_ops->setup(dev); + if (err) + return err; + } + for (ch = 0; ch < max_channels(dev); ch++) { struct tw686x_video_channel *vc = &dev->video_channels[ch]; struct video_device *vdev; @@ -842,10 +1151,12 @@ int tw686x_video_init(struct tw686x_dev *dev) reg_write(dev, HACTIVE_LO[ch], 0xd0); reg_write(dev, VIDEO_SIZE[ch], 0); - for (pb = 0; pb < 2; pb++) { - err = tw686x_alloc_dma(vc, pb); - if (err) - goto error; + if (dev->dma_ops->alloc) { + for (pb = 0; pb < 2; pb++) { + err = dev->dma_ops->alloc(vc, pb); + if (err) + goto error; + } } vc->vidq.io_modes = VB2_READ | VB2_MMAP | VB2_DMABUF; @@ -853,11 +1164,12 @@ int tw686x_video_init(struct tw686x_dev *dev) vc->vidq.drv_priv = vc; vc->vidq.buf_struct_size = sizeof(struct tw686x_v4l2_buf); vc->vidq.ops = &tw686x_video_qops; - vc->vidq.mem_ops = &vb2_vmalloc_memops; + vc->vidq.mem_ops = dev->dma_ops->mem_ops; vc->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; vc->vidq.min_buffers_needed = 2; vc->vidq.lock = &vc->vb_mutex; vc->vidq.gfp_flags = GFP_DMA32; + vc->vidq.dev = &dev->pci_dev->dev; err = vb2_queue_init(&vc->vidq); if (err) { @@ -915,10 +1227,9 @@ int tw686x_video_init(struct tw686x_dev *dev) vc->num = vdev->num; } - /* Set DMA frame mode on all channels. Only supported mode for now. */ val = TW686X_DEF_PHASE_REF; for (ch = 0; ch < max_channels(dev); ch++) - val |= TW686X_FRAME_MODE << (16 + ch * 2); + val |= dev->dma_ops->hw_dma_mode << (16 + ch * 2); reg_write(dev, PHASE_REF, val); reg_write(dev, MISC2[0], 0xe7); diff --git a/drivers/media/pci/tw686x/tw686x.h b/drivers/media/pci/tw686x/tw686x.h index 44b5755acf02..f24a2a9bcdb2 100644 --- a/drivers/media/pci/tw686x/tw686x.h +++ b/drivers/media/pci/tw686x/tw686x.h @@ -27,16 +27,14 @@ #define TYPE_SECOND_GEN 0x10 #define TW686X_DEF_PHASE_REF 0x1518 -#define TW686X_FIELD_MODE 0x3 -#define TW686X_FRAME_MODE 0x2 -/* 0x1 is reserved */ -#define TW686X_SG_MODE 0x0 - -#define TW686X_AUDIO_PAGE_SZ 4096 #define TW686X_AUDIO_PAGE_MAX 16 #define TW686X_AUDIO_PERIODS_MIN 2 #define TW686X_AUDIO_PERIODS_MAX TW686X_AUDIO_PAGE_MAX +#define TW686X_DMA_MODE_MEMCPY 0 +#define TW686X_DMA_MODE_CONTIG 1 +#define TW686X_DMA_MODE_SG 2 + struct tw686x_format { char *name; unsigned int fourcc; @@ -50,6 +48,12 @@ struct tw686x_dma_desc { unsigned int size; }; +struct tw686x_sg_desc { + /* 3 MSBits for flags, 13 LSBits for length */ + __le32 flags_length; + __le32 phys; +}; + struct tw686x_audio_buf { dma_addr_t dma; void *virt; @@ -82,6 +86,7 @@ struct tw686x_video_channel { struct video_device *device; struct tw686x_v4l2_buf *curr_bufs[2]; struct tw686x_dma_desc dma_descs[2]; + struct tw686x_sg_desc *sg_descs[2]; struct v4l2_ctrl_handler ctrl_handler; const struct tw686x_format *format; @@ -99,6 +104,16 @@ struct tw686x_video_channel { bool no_signal; }; +struct tw686x_dma_ops { + int (*setup)(struct tw686x_dev *dev); + int (*alloc)(struct tw686x_video_channel *vc, unsigned int pb); + void (*free)(struct tw686x_video_channel *vc, unsigned int pb); + void (*buf_refill)(struct tw686x_video_channel *vc, unsigned int pb); + const struct vb2_mem_ops *mem_ops; + enum v4l2_field field; + u32 hw_dma_mode; +}; + /** * struct tw686x_dev - global device status * @lock: spinlock controlling access to the @@ -112,15 +127,18 @@ struct tw686x_dev { char name[32]; unsigned int type; + unsigned int dma_mode; struct pci_dev *pci_dev; __u32 __iomem *mmio; - void *alloc_ctx; - + const struct tw686x_dma_ops *dma_ops; struct tw686x_video_channel *video_channels; struct tw686x_audio_channel *audio_channels; - int audio_rate; /* per-device value */ + /* Per-device audio parameters */ + int audio_rate; + int period_size; + int audio_enabled; struct timer_list dma_delay_timer; u32 pending_dma_en; /* must be protected by lock */ @@ -143,6 +161,12 @@ static inline unsigned int max_channels(struct tw686x_dev *dev) return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */ } +static inline unsigned is_second_gen(struct tw686x_dev *dev) +{ + /* each channel has its own DMA SG table */ + return dev->type & TYPE_SECOND_GEN; +} + void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel); void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel); |