diff options
| -rw-r--r-- | drivers/media/video/marvell-ccic/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/media/video/marvell-ccic/mcam-core.c | 149 | ||||
| -rw-r--r-- | drivers/media/video/marvell-ccic/mcam-core.h | 59 |
3 files changed, 152 insertions, 59 deletions
diff --git a/drivers/media/video/marvell-ccic/Kconfig b/drivers/media/video/marvell-ccic/Kconfig index 5be66e2..bf739e3 100644 --- a/drivers/media/video/marvell-ccic/Kconfig +++ b/drivers/media/video/marvell-ccic/Kconfig @@ -4,7 +4,6 @@ config VIDEO_CAFE_CCIC select VIDEO_OV7670 select VIDEOBUF2_VMALLOC select VIDEOBUF2_DMA_CONTIG - select VIDEOBUF2_DMA_SG ---help--- This is a video4linux2 driver for the Marvell 88ALP01 integrated CMOS camera controller. This is the controller found on first- @@ -15,8 +14,6 @@ config VIDEO_MMP_CAMERA depends on ARCH_MMP && I2C && VIDEO_V4L2 select VIDEO_OV7670 select I2C_GPIO - select VIDEOBUF2_VMALLOC - select VIDEOBUF2_DMA_CONTIG select VIDEOBUF2_DMA_SG ---help--- This is a Video4Linux2 driver for the integrated camera diff --git a/drivers/media/video/marvell-ccic/mcam-core.c b/drivers/media/video/marvell-ccic/mcam-core.c index 9867b3b..073e72c 100644 --- a/drivers/media/video/marvell-ccic/mcam-core.c +++ b/drivers/media/video/marvell-ccic/mcam-core.c @@ -37,6 +37,7 @@ static int frames; static int singles; static int delivered; +#ifdef MCAM_MODE_VMALLOC /* * Internal DMA buffer management. Since the controller cannot do S/G I/O, * we must have physically contiguous buffers to bring frames into. @@ -71,6 +72,10 @@ MODULE_PARM_DESC(dma_buf_size, "The size of the allocated DMA buffers. If actual operating " "parameters require larger buffers, an attempt to reallocate " "will be made."); +#else /* MCAM_MODE_VMALLOC */ +static const int alloc_bufs_at_read = 0; +static const int n_dma_bufs = 3; /* Used by S/G_PARM */ +#endif /* MCAM_MODE_VMALLOC */ static int flip; module_param(flip, bool, 0444); @@ -256,6 +261,8 @@ static void mcam_ctlr_stop(struct mcam_camera *cam) } /* ------------------------------------------------------------------- */ + +#ifdef MCAM_MODE_VMALLOC /* * Code specific to the vmalloc buffer mode. */ @@ -381,6 +388,46 @@ static void mcam_frame_tasklet(unsigned long data) } +/* + * Make sure our allocated buffers are up to the task. + */ +static int mcam_check_dma_buffers(struct mcam_camera *cam) +{ + if (cam->nbufs > 0 && cam->dma_buf_size < cam->pix_format.sizeimage) + mcam_free_dma_bufs(cam); + if (cam->nbufs == 0) + return mcam_alloc_dma_bufs(cam, 0); + return 0; +} + +static void mcam_vmalloc_done(struct mcam_camera *cam, int frame) +{ + tasklet_schedule(&cam->s_tasklet); +} + +#else /* MCAM_MODE_VMALLOC */ + +static inline int mcam_alloc_dma_bufs(struct mcam_camera *cam, int loadtime) +{ + return 0; +} + +static inline void mcam_free_dma_bufs(struct mcam_camera *cam) +{ + return; +} + +static inline int mcam_check_dma_buffers(struct mcam_camera *cam) +{ + return 0; +} + + + +#endif /* MCAM_MODE_VMALLOC */ + + +#ifdef MCAM_MODE_DMA_CONTIG /* ---------------------------------------------------------------------- */ /* * DMA-contiguous code. @@ -444,8 +491,9 @@ static void mcam_dma_contig_done(struct mcam_camera *cam, int frame) mcam_set_contig_buffer(cam, frame); } +#endif /* MCAM_MODE_DMA_CONTIG */ - +#ifdef MCAM_MODE_DMA_SG /* ---------------------------------------------------------------------- */ /* * Scatter/gather-specific code. @@ -540,6 +588,14 @@ static void mcam_sg_restart(struct mcam_camera *cam) clear_bit(CF_SG_RESTART, &cam->flags); } +#else /* MCAM_MODE_DMA_SG */ + +static inline void mcam_sg_restart(struct mcam_camera *cam) +{ + return; +} + +#endif /* MCAM_MODE_DMA_SG */ /* ---------------------------------------------------------------------- */ /* @@ -605,17 +661,7 @@ static int mcam_ctlr_configure(struct mcam_camera *cam) unsigned long flags; spin_lock_irqsave(&cam->dev_lock, flags); - switch (cam->buffer_mode) { - case B_vmalloc: - mcam_ctlr_dma_vmalloc(cam); - break; - case B_DMA_contig: - mcam_ctlr_dma_contig(cam); - break; - case B_DMA_sg: - mcam_ctlr_dma_sg(cam); - break; - } + cam->dma_setup(cam); mcam_ctlr_image(cam); mcam_set_config_needed(cam, 0); clear_bit(CF_SG_RESTART, &cam->flags); @@ -948,6 +994,8 @@ static const struct vb2_ops mcam_vb2_ops = { .wait_finish = mcam_vb_wait_finish, }; + +#ifdef MCAM_MODE_DMA_SG /* * Scatter/gather mode uses all of the above functions plus a * few extras to deal with DMA mapping. @@ -1022,6 +1070,8 @@ static const struct vb2_ops mcam_vb2_sg_ops = { .wait_finish = mcam_vb_wait_finish, }; +#endif /* MCAM_MODE_DMA_SG */ + static int mcam_setup_vb2(struct mcam_camera *cam) { struct vb2_queue *vq = &cam->vb_queue; @@ -1032,21 +1082,35 @@ static int mcam_setup_vb2(struct mcam_camera *cam) INIT_LIST_HEAD(&cam->buffers); switch (cam->buffer_mode) { case B_DMA_contig: +#ifdef MCAM_MODE_DMA_CONTIG vq->ops = &mcam_vb2_ops; vq->mem_ops = &vb2_dma_contig_memops; cam->vb_alloc_ctx = vb2_dma_contig_init_ctx(cam->dev); vq->io_modes = VB2_MMAP | VB2_USERPTR; + cam->dma_setup = mcam_ctlr_dma_contig; + cam->frame_complete = mcam_dma_contig_done; +#endif break; case B_DMA_sg: +#ifdef MCAM_MODE_DMA_SG vq->ops = &mcam_vb2_sg_ops; vq->mem_ops = &vb2_dma_sg_memops; vq->io_modes = VB2_MMAP | VB2_USERPTR; + cam->dma_setup = mcam_ctlr_dma_sg; + cam->frame_complete = mcam_dma_sg_done; +#endif break; case B_vmalloc: +#ifdef MCAM_MODE_VMALLOC + tasklet_init(&cam->s_tasklet, mcam_frame_tasklet, + (unsigned long) cam); vq->ops = &mcam_vb2_ops; vq->mem_ops = &vb2_vmalloc_memops; vq->buf_struct_size = sizeof(struct mcam_vb_buffer); vq->io_modes = VB2_MMAP; + cam->dma_setup = mcam_ctlr_dma_vmalloc; + cam->frame_complete = mcam_vmalloc_done; +#endif break; } return vb2_queue_init(vq); @@ -1055,8 +1119,10 @@ static int mcam_setup_vb2(struct mcam_camera *cam) static void mcam_cleanup_vb2(struct mcam_camera *cam) { vb2_queue_release(&cam->vb_queue); +#ifdef MCAM_MODE_DMA_CONTIG if (cam->buffer_mode == B_DMA_contig) vb2_dma_contig_cleanup_ctx(cam->vb_alloc_ctx); +#endif } @@ -1258,15 +1324,10 @@ static int mcam_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, /* * Make sure we have appropriate DMA buffers. */ - ret = -ENOMEM; if (cam->buffer_mode == B_vmalloc) { - if (cam->nbufs > 0 && - cam->dma_buf_size < cam->pix_format.sizeimage) - mcam_free_dma_bufs(cam); - if (cam->nbufs == 0) { - if (mcam_alloc_dma_bufs(cam, 0)) - goto out; - } + ret = mcam_check_dma_buffers(cam); + if (ret) + goto out; } mcam_set_config_needed(cam, 1); ret = 0; @@ -1587,17 +1648,7 @@ static void mcam_frame_complete(struct mcam_camera *cam, int frame) /* * Process the frame and set up the next one. */ - switch (cam->buffer_mode) { - case B_vmalloc: - tasklet_schedule(&cam->s_tasklet); - break; - case B_DMA_contig: - mcam_dma_contig_done(cam, frame); - break; - case B_DMA_sg: - mcam_dma_sg_done(cam, frame); - break; - } + cam->frame_complete(cam, frame); } @@ -1663,6 +1714,22 @@ int mccic_register(struct mcam_camera *cam) int ret; /* + * Validate the requested buffer mode. + */ + if (buffer_mode >= 0) + cam->buffer_mode = buffer_mode; + if (cam->buffer_mode == B_DMA_sg && + cam->chip_id == V4L2_IDENT_CAFE) { + printk(KERN_ERR "marvell-cam: Cafe can't do S/G I/O, " + "attempting vmalloc mode instead\n"); + cam->buffer_mode = B_vmalloc; + } + if (!mcam_buffer_mode_supported(cam->buffer_mode)) { + printk(KERN_ERR "marvell-cam: buffer mode %d unsupported\n", + cam->buffer_mode); + return -EINVAL; + } + /* * Register with V4L */ ret = v4l2_device_register(cam->dev, &cam->v4l2_dev); @@ -1676,26 +1743,6 @@ int mccic_register(struct mcam_camera *cam) cam->mbus_code = mcam_def_mbus_code; INIT_LIST_HEAD(&cam->dev_list); INIT_LIST_HEAD(&cam->buffers); - tasklet_init(&cam->s_tasklet, mcam_frame_tasklet, (unsigned long) cam); - /* - * User space may want to override the asked-for buffer mode; - * here's hoping they know what they're doing. - */ - if (buffer_mode == 0) - cam->buffer_mode = B_vmalloc; - else if (buffer_mode == 1) - cam->buffer_mode = B_DMA_contig; - else if (buffer_mode == 2) { - if (cam->chip_id == V4L2_IDENT_ARMADA610) - cam->buffer_mode = B_DMA_sg; - else { - printk(KERN_ERR "marvell-cam: Cafe can't do S/G I/O\n"); - cam->buffer_mode = B_vmalloc; - } - } else if (buffer_mode != -1) - printk(KERN_ERR "marvell-cam: " - "Strange module buffer mode %d - ignoring\n", - buffer_mode); mcam_ctlr_init(cam); /* diff --git a/drivers/media/video/marvell-ccic/mcam-core.h b/drivers/media/video/marvell-ccic/mcam-core.h index 9a39e08..aa55255 100644 --- a/drivers/media/video/marvell-ccic/mcam-core.h +++ b/drivers/media/video/marvell-ccic/mcam-core.h @@ -11,6 +11,27 @@ #include <media/v4l2-dev.h> #include <media/videobuf2-core.h> +/* + * Create our own symbols for the supported buffer modes, but, for now, + * base them entirely on which videobuf2 options have been selected. + */ +#if defined(CONFIG_VIDEOBUF2_VMALLOC) || defined(CONFIG_VIDEOBUF2_VMALLOC_MODULE) +#define MCAM_MODE_VMALLOC 1 +#endif + +#if defined(CONFIG_VIDEOBUF2_DMA_CONTIG) || defined(CONFIG_VIDEOBUF2_DMA_CONTIG_MODULE) +#define MCAM_MODE_DMA_CONTIG 1 +#endif + +#if defined(CONFIG_VIDEOBUF2_DMA_SG) || defined(CONFIG_VIDEOBUF2_DMA_SG_MODULE) +#define MCAM_MODE_DMA_SG 1 +#endif + +#if !defined(MCAM_MODE_VMALLOC) && !defined(MCAM_MODE_DMA_CONTIG) && \ + !defined(MCAM_MODE_DMA_SG) +#error One of the videobuf buffer modes must be selected in the config +#endif + enum mcam_state { S_NOTREADY, /* Not yet initialized */ @@ -27,11 +48,33 @@ enum mcam_state { */ enum mcam_buffer_mode { B_vmalloc = 0, - B_DMA_contig, - B_DMA_sg + B_DMA_contig = 1, + B_DMA_sg = 2 }; /* + * Is a given buffer mode supported by the current kernel configuration? + */ +static inline int mcam_buffer_mode_supported(enum mcam_buffer_mode mode) +{ + switch (mode) { +#ifdef MCAM_MODE_VMALLOC + case B_vmalloc: +#endif +#ifdef MCAM_MODE_DMA_CONTIG + case B_DMA_contig: +#endif +#ifdef MCAM_MODE_DMA_SG + case B_DMA_sg: +#endif + return 1; + default: + return 0; + } +} + + +/* * A description of one of our devices. * Locking: controlled by s_mutex. Certain fields, however, require * the dev_lock spinlock; they are marked as such by comments. @@ -79,21 +122,27 @@ struct mcam_camera { struct vb2_queue vb_queue; struct list_head buffers; /* Available frames */ - /* DMA buffers - vmalloc mode */ unsigned int nbufs; /* How many are alloc'd */ int next_buf; /* Next to consume (dev_lock) */ + + /* DMA buffers - vmalloc mode */ +#ifdef MCAM_MODE_VMALLOC unsigned int dma_buf_size; /* allocated size */ void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */ dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */ + struct tasklet_struct s_tasklet; +#endif unsigned int sequence; /* Frame sequence number */ unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual bufs */ - /* DMA buffers - contiguous DMA mode */ + /* DMA buffers - DMA modes */ struct mcam_vb_buffer *vb_bufs[MAX_DMA_BUFS]; struct vb2_alloc_ctx *vb_alloc_ctx; unsigned short last_delivered; - struct tasklet_struct s_tasklet; + /* Mode-specific ops, set at open time */ + void (*dma_setup)(struct mcam_camera *cam); + void (*frame_complete)(struct mcam_camera *cam, int frame); /* Current operating parameters */ u32 sensor_type; /* Currently ov7670 only */ |
