2 * Copyright (c) 2011 Atmel Corporation
3 * Josh Wu, <josh.wu@atmel.com>
5 * Based on previous work by Lars Haring, <lars.haring@atmel.com>
7 * Based on the bttv driver for Bt848 with respective copyright holders
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/clk.h>
15 #include <linux/completion.h>
16 #include <linux/delay.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
26 #include <media/atmel-isi.h>
27 #include <media/soc_camera.h>
28 #include <media/soc_mediabus.h>
29 #include <media/v4l2-of.h>
30 #include <media/videobuf2-dma-contig.h>
32 #define MAX_BUFFER_NUM 32
33 #define MAX_SUPPORT_WIDTH 2048
34 #define MAX_SUPPORT_HEIGHT 2048
35 #define VID_LIMIT_BYTES (16 * 1024 * 1024)
36 #define MIN_FRAME_RATE 15
37 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE)
39 /* Frame buffer descriptor */
41 /* Physical address of the frame buffer */
43 /* DMA Control Register(only in HISI2) */
45 /* Physical address of the next fbd */
49 static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl)
51 fb_desc->dma_ctrl = ctrl;
55 struct list_head list;
60 /* Frame buffer data */
63 struct isi_dma_desc *p_dma_desc;
64 struct list_head list;
68 /* Protects the access of variables shared with the ISR */
74 struct vb2_alloc_ctx *alloc_ctx;
76 /* Allocate descriptors for dma buffer use */
77 struct fbd *p_fb_descriptors;
78 dma_addr_t fb_descriptors_phys;
79 struct list_head dma_desc_head;
80 struct isi_dma_desc dma_desc[MAX_BUFFER_NUM];
82 struct completion complete;
83 /* ISI peripherial clock */
87 struct isi_platform_data pdata;
88 u16 width_flags; /* max 12 bits */
90 struct list_head video_buffer_list;
91 struct frame_buffer *active;
93 struct soc_camera_host soc_host;
96 static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val)
98 writel(val, isi->regs + reg);
100 static u32 isi_readl(struct atmel_isi *isi, u32 reg)
102 return readl(isi->regs + reg);
105 static int configure_geometry(struct atmel_isi *isi, u32 width,
106 u32 height, u32 code)
111 /* YUV, including grey */
112 case MEDIA_BUS_FMT_Y8_1X8:
113 cr = ISI_CFG2_GRAYSCALE;
115 case MEDIA_BUS_FMT_VYUY8_2X8:
116 cr = ISI_CFG2_YCC_SWAP_MODE_3;
118 case MEDIA_BUS_FMT_UYVY8_2X8:
119 cr = ISI_CFG2_YCC_SWAP_MODE_2;
121 case MEDIA_BUS_FMT_YVYU8_2X8:
122 cr = ISI_CFG2_YCC_SWAP_MODE_1;
124 case MEDIA_BUS_FMT_YUYV8_2X8:
125 cr = ISI_CFG2_YCC_SWAP_DEFAULT;
132 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
134 cfg2 = isi_readl(isi, ISI_CFG2);
135 /* Set YCC swap mode */
136 cfg2 &= ~ISI_CFG2_YCC_SWAP_MODE_MASK;
139 cfg2 &= ~(ISI_CFG2_IM_HSIZE_MASK);
140 cfg2 |= ((width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
141 ISI_CFG2_IM_HSIZE_MASK;
143 cfg2 &= ~(ISI_CFG2_IM_VSIZE_MASK);
144 cfg2 |= ((height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
145 & ISI_CFG2_IM_VSIZE_MASK;
146 isi_writel(isi, ISI_CFG2, cfg2);
151 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
154 struct vb2_buffer *vb = &isi->active->vb;
155 struct frame_buffer *buf = isi->active;
157 list_del_init(&buf->list);
158 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
159 vb->v4l2_buf.sequence = isi->sequence++;
160 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
163 if (list_empty(&isi->video_buffer_list)) {
166 /* start next dma frame. */
167 isi->active = list_entry(isi->video_buffer_list.next,
168 struct frame_buffer, list);
169 isi_writel(isi, ISI_DMA_C_DSCR,
170 (u32)isi->active->p_dma_desc->fbd_phys);
171 isi_writel(isi, ISI_DMA_C_CTRL,
172 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
173 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
178 /* ISI interrupt service routine */
179 static irqreturn_t isi_interrupt(int irq, void *dev_id)
181 struct atmel_isi *isi = dev_id;
182 u32 status, mask, pending;
183 irqreturn_t ret = IRQ_NONE;
185 spin_lock(&isi->lock);
187 status = isi_readl(isi, ISI_STATUS);
188 mask = isi_readl(isi, ISI_INTMASK);
189 pending = status & mask;
191 if (pending & ISI_CTRL_SRST) {
192 complete(&isi->complete);
193 isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST);
195 } else if (pending & ISI_CTRL_DIS) {
196 complete(&isi->complete);
197 isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS);
200 if (likely(pending & ISI_SR_CXFR_DONE))
201 ret = atmel_isi_handle_streaming(isi);
204 spin_unlock(&isi->lock);
208 #define WAIT_ISI_RESET 1
209 #define WAIT_ISI_DISABLE 0
210 static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset)
212 unsigned long timeout;
214 * The reset or disable will only succeed if we have a
215 * pixel clock from the camera.
217 init_completion(&isi->complete);
220 isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST);
221 isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST);
223 isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS);
224 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
227 timeout = wait_for_completion_timeout(&isi->complete,
228 msecs_to_jiffies(100));
235 /* ------------------------------------------------------------------
237 ------------------------------------------------------------------*/
238 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
239 unsigned int *nbuffers, unsigned int *nplanes,
240 unsigned int sizes[], void *alloc_ctxs[])
242 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
243 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
244 struct atmel_isi *isi = ici->priv;
247 size = icd->sizeimage;
249 if (!*nbuffers || *nbuffers > MAX_BUFFER_NUM)
250 *nbuffers = MAX_BUFFER_NUM;
252 if (size * *nbuffers > VID_LIMIT_BYTES)
253 *nbuffers = VID_LIMIT_BYTES / size;
257 alloc_ctxs[0] = isi->alloc_ctx;
262 dev_dbg(icd->parent, "%s, count=%d, size=%ld\n", __func__,
268 static int buffer_init(struct vb2_buffer *vb)
270 struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
272 buf->p_dma_desc = NULL;
273 INIT_LIST_HEAD(&buf->list);
278 static int buffer_prepare(struct vb2_buffer *vb)
280 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
281 struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
282 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
283 struct atmel_isi *isi = ici->priv;
285 struct isi_dma_desc *desc;
287 size = icd->sizeimage;
289 if (vb2_plane_size(vb, 0) < size) {
290 dev_err(icd->parent, "%s data will not fit into plane (%lu < %lu)\n",
291 __func__, vb2_plane_size(vb, 0), size);
295 vb2_set_plane_payload(&buf->vb, 0, size);
297 if (!buf->p_dma_desc) {
298 if (list_empty(&isi->dma_desc_head)) {
299 dev_err(icd->parent, "Not enough dma descriptors.\n");
302 /* Get an available descriptor */
303 desc = list_entry(isi->dma_desc_head.next,
304 struct isi_dma_desc, list);
305 /* Delete the descriptor since now it is used */
306 list_del_init(&desc->list);
308 /* Initialize the dma descriptor */
309 desc->p_fbd->fb_address =
310 vb2_dma_contig_plane_dma_addr(vb, 0);
311 desc->p_fbd->next_fbd_address = 0;
312 set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB);
314 buf->p_dma_desc = desc;
320 static void buffer_cleanup(struct vb2_buffer *vb)
322 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
323 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
324 struct atmel_isi *isi = ici->priv;
325 struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
327 /* This descriptor is available now and we add to head list */
329 list_add(&buf->p_dma_desc->list, &isi->dma_desc_head);
332 static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
336 cfg1 = isi_readl(isi, ISI_CFG1);
337 /* Enable irq: cxfr for the codec path, pxfr for the preview path */
338 isi_writel(isi, ISI_INTEN,
339 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
341 /* Check if already in a frame */
342 if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
343 dev_err(isi->soc_host.icd->parent, "Already in frame handling.\n");
347 isi_writel(isi, ISI_DMA_C_DSCR, (u32)buffer->p_dma_desc->fbd_phys);
348 isi_writel(isi, ISI_DMA_C_CTRL, ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
349 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
351 cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK;
352 /* Enable linked list */
353 cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR;
355 /* Enable codec path and ISI */
356 ctrl = ISI_CTRL_CDC | ISI_CTRL_EN;
357 isi_writel(isi, ISI_CTRL, ctrl);
358 isi_writel(isi, ISI_CFG1, cfg1);
361 static void buffer_queue(struct vb2_buffer *vb)
363 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
364 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
365 struct atmel_isi *isi = ici->priv;
366 struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
367 unsigned long flags = 0;
369 spin_lock_irqsave(&isi->lock, flags);
370 list_add_tail(&buf->list, &isi->video_buffer_list);
372 if (isi->active == NULL) {
374 if (vb2_is_streaming(vb->vb2_queue))
377 spin_unlock_irqrestore(&isi->lock, flags);
380 static int start_streaming(struct vb2_queue *vq, unsigned int count)
382 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
383 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
384 struct atmel_isi *isi = ici->priv;
387 pm_runtime_get_sync(ici->v4l2_dev.dev);
390 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
392 dev_err(icd->parent, "Reset ISI timed out\n");
393 pm_runtime_put(ici->v4l2_dev.dev);
396 /* Disable all interrupts */
397 isi_writel(isi, ISI_INTDIS, (u32)~0UL);
399 spin_lock_irq(&isi->lock);
400 /* Clear any pending interrupt */
401 isi_readl(isi, ISI_STATUS);
404 start_dma(isi, isi->active);
405 spin_unlock_irq(&isi->lock);
410 /* abort streaming and wait for last buffer */
411 static void stop_streaming(struct vb2_queue *vq)
413 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
414 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
415 struct atmel_isi *isi = ici->priv;
416 struct frame_buffer *buf, *node;
418 unsigned long timeout;
420 spin_lock_irq(&isi->lock);
422 /* Release all active buffers */
423 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
424 list_del_init(&buf->list);
425 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
427 spin_unlock_irq(&isi->lock);
429 timeout = jiffies + FRAME_INTERVAL_MILLI_SEC * HZ;
430 /* Wait until the end of the current frame. */
431 while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) &&
432 time_before(jiffies, timeout))
435 if (time_after(jiffies, timeout))
437 "Timeout waiting for finishing codec request\n");
439 /* Disable interrupts */
440 isi_writel(isi, ISI_INTDIS,
441 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
443 /* Disable ISI and wait for it is done */
444 ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE);
446 dev_err(icd->parent, "Disable ISI timed out\n");
448 pm_runtime_put(ici->v4l2_dev.dev);
451 static struct vb2_ops isi_video_qops = {
452 .queue_setup = queue_setup,
453 .buf_init = buffer_init,
454 .buf_prepare = buffer_prepare,
455 .buf_cleanup = buffer_cleanup,
456 .buf_queue = buffer_queue,
457 .start_streaming = start_streaming,
458 .stop_streaming = stop_streaming,
459 .wait_prepare = vb2_ops_wait_prepare,
460 .wait_finish = vb2_ops_wait_finish,
463 /* ------------------------------------------------------------------
464 SOC camera operations for the device
465 ------------------------------------------------------------------*/
466 static int isi_camera_init_videobuf(struct vb2_queue *q,
467 struct soc_camera_device *icd)
469 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
471 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
472 q->io_modes = VB2_MMAP;
474 q->buf_struct_size = sizeof(struct frame_buffer);
475 q->ops = &isi_video_qops;
476 q->mem_ops = &vb2_dma_contig_memops;
477 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
478 q->lock = &ici->host_lock;
480 return vb2_queue_init(q);
483 static int isi_camera_set_fmt(struct soc_camera_device *icd,
484 struct v4l2_format *f)
486 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
487 struct atmel_isi *isi = ici->priv;
488 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
489 const struct soc_camera_format_xlate *xlate;
490 struct v4l2_pix_format *pix = &f->fmt.pix;
491 struct v4l2_subdev_format format = {
492 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
494 struct v4l2_mbus_framefmt *mf = &format.format;
497 xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
499 dev_warn(icd->parent, "Format %x not found\n",
504 dev_dbg(icd->parent, "Plan to set format %dx%d\n",
505 pix->width, pix->height);
507 mf->width = pix->width;
508 mf->height = pix->height;
509 mf->field = pix->field;
510 mf->colorspace = pix->colorspace;
511 mf->code = xlate->code;
513 ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &format);
517 if (mf->code != xlate->code)
520 /* Enable PM and peripheral clock before operate isi registers */
521 pm_runtime_get_sync(ici->v4l2_dev.dev);
523 ret = configure_geometry(isi, pix->width, pix->height, xlate->code);
525 pm_runtime_put(ici->v4l2_dev.dev);
530 pix->width = mf->width;
531 pix->height = mf->height;
532 pix->field = mf->field;
533 pix->colorspace = mf->colorspace;
534 icd->current_fmt = xlate;
536 dev_dbg(icd->parent, "Finally set format %dx%d\n",
537 pix->width, pix->height);
542 static int isi_camera_try_fmt(struct soc_camera_device *icd,
543 struct v4l2_format *f)
545 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
546 const struct soc_camera_format_xlate *xlate;
547 struct v4l2_pix_format *pix = &f->fmt.pix;
548 struct v4l2_subdev_pad_config pad_cfg;
549 struct v4l2_subdev_format format = {
550 .which = V4L2_SUBDEV_FORMAT_TRY,
552 struct v4l2_mbus_framefmt *mf = &format.format;
553 u32 pixfmt = pix->pixelformat;
556 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
557 if (pixfmt && !xlate) {
558 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
562 /* limit to Atmel ISI hardware capabilities */
563 if (pix->height > MAX_SUPPORT_HEIGHT)
564 pix->height = MAX_SUPPORT_HEIGHT;
565 if (pix->width > MAX_SUPPORT_WIDTH)
566 pix->width = MAX_SUPPORT_WIDTH;
568 /* limit to sensor capabilities */
569 mf->width = pix->width;
570 mf->height = pix->height;
571 mf->field = pix->field;
572 mf->colorspace = pix->colorspace;
573 mf->code = xlate->code;
575 ret = v4l2_subdev_call(sd, pad, set_fmt, &pad_cfg, &format);
579 pix->width = mf->width;
580 pix->height = mf->height;
581 pix->colorspace = mf->colorspace;
585 pix->field = V4L2_FIELD_NONE;
587 case V4L2_FIELD_NONE:
590 dev_err(icd->parent, "Field type %d unsupported.\n",
598 static const struct soc_mbus_pixelfmt isi_camera_formats[] = {
600 .fourcc = V4L2_PIX_FMT_YUYV,
601 .name = "Packed YUV422 16 bit",
602 .bits_per_sample = 8,
603 .packing = SOC_MBUS_PACKING_2X8_PADHI,
604 .order = SOC_MBUS_ORDER_LE,
605 .layout = SOC_MBUS_LAYOUT_PACKED,
609 /* This will be corrected as we get more formats */
610 static bool isi_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt)
612 return fmt->packing == SOC_MBUS_PACKING_NONE ||
613 (fmt->bits_per_sample == 8 &&
614 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
615 (fmt->bits_per_sample > 8 &&
616 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
619 #define ISI_BUS_PARAM (V4L2_MBUS_MASTER | \
620 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
621 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
622 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
623 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
624 V4L2_MBUS_PCLK_SAMPLE_RISING | \
625 V4L2_MBUS_PCLK_SAMPLE_FALLING | \
626 V4L2_MBUS_DATA_ACTIVE_HIGH)
628 static int isi_camera_try_bus_param(struct soc_camera_device *icd,
629 unsigned char buswidth)
631 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
632 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
633 struct atmel_isi *isi = ici->priv;
634 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
635 unsigned long common_flags;
638 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
640 common_flags = soc_mbus_config_compatible(&cfg,
643 dev_warn(icd->parent,
644 "Flags incompatible: camera 0x%x, host 0x%x\n",
645 cfg.flags, ISI_BUS_PARAM);
648 } else if (ret != -ENOIOCTLCMD) {
652 if ((1 << (buswidth - 1)) & isi->width_flags)
658 static int isi_camera_get_formats(struct soc_camera_device *icd,
660 struct soc_camera_format_xlate *xlate)
662 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
663 int formats = 0, ret;
665 struct v4l2_subdev_mbus_code_enum code = {
666 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
669 /* soc camera host format */
670 const struct soc_mbus_pixelfmt *fmt;
672 ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
674 /* No more formats */
677 fmt = soc_mbus_get_fmtdesc(code.code);
680 "Invalid format code #%u: %d\n", idx, code.code);
684 /* This also checks support for the requested bits-per-sample */
685 ret = isi_camera_try_bus_param(icd, fmt->bits_per_sample);
688 "Fail to try the bus parameters.\n");
693 case MEDIA_BUS_FMT_UYVY8_2X8:
694 case MEDIA_BUS_FMT_VYUY8_2X8:
695 case MEDIA_BUS_FMT_YUYV8_2X8:
696 case MEDIA_BUS_FMT_YVYU8_2X8:
699 xlate->host_fmt = &isi_camera_formats[0];
700 xlate->code = code.code;
702 dev_dbg(icd->parent, "Providing format %s using code %d\n",
703 isi_camera_formats[0].name, code.code);
707 if (!isi_camera_packing_supported(fmt))
711 "Providing format %s in pass-through mode\n",
715 /* Generic pass-through */
718 xlate->host_fmt = fmt;
719 xlate->code = code.code;
726 static int isi_camera_add_device(struct soc_camera_device *icd)
728 dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
734 static void isi_camera_remove_device(struct soc_camera_device *icd)
736 dev_dbg(icd->parent, "Atmel ISI Camera driver detached from camera %d\n",
740 static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
742 struct soc_camera_device *icd = file->private_data;
744 return vb2_poll(&icd->vb2_vidq, file, pt);
747 static int isi_camera_querycap(struct soc_camera_host *ici,
748 struct v4l2_capability *cap)
750 strcpy(cap->driver, "atmel-isi");
751 strcpy(cap->card, "Atmel Image Sensor Interface");
752 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
753 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
758 static int isi_camera_set_bus_param(struct soc_camera_device *icd)
760 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
761 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
762 struct atmel_isi *isi = ici->priv;
763 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
764 unsigned long common_flags;
768 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
770 common_flags = soc_mbus_config_compatible(&cfg,
773 dev_warn(icd->parent,
774 "Flags incompatible: camera 0x%x, host 0x%x\n",
775 cfg.flags, ISI_BUS_PARAM);
778 } else if (ret != -ENOIOCTLCMD) {
781 common_flags = ISI_BUS_PARAM;
783 dev_dbg(icd->parent, "Flags cam: 0x%x host: 0x%x common: 0x%lx\n",
784 cfg.flags, ISI_BUS_PARAM, common_flags);
786 /* Make choises, based on platform preferences */
787 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
788 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
789 if (isi->pdata.hsync_act_low)
790 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
792 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
795 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
796 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
797 if (isi->pdata.vsync_act_low)
798 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
800 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
803 if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
804 (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
805 if (isi->pdata.pclk_act_falling)
806 common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
808 common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
811 cfg.flags = common_flags;
812 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
813 if (ret < 0 && ret != -ENOIOCTLCMD) {
814 dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
819 /* set bus param for ISI */
820 if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
821 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW;
822 if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
823 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW;
824 if (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
825 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING;
827 if (isi->pdata.has_emb_sync)
828 cfg1 |= ISI_CFG1_EMB_SYNC;
829 if (isi->pdata.full_mode)
830 cfg1 |= ISI_CFG1_FULL_MODE;
832 cfg1 |= ISI_CFG1_THMASK_BEATS_16;
834 /* Enable PM and peripheral clock before operate isi registers */
835 pm_runtime_get_sync(ici->v4l2_dev.dev);
837 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
838 isi_writel(isi, ISI_CFG1, cfg1);
840 pm_runtime_put(ici->v4l2_dev.dev);
845 static struct soc_camera_host_ops isi_soc_camera_host_ops = {
846 .owner = THIS_MODULE,
847 .add = isi_camera_add_device,
848 .remove = isi_camera_remove_device,
849 .set_fmt = isi_camera_set_fmt,
850 .try_fmt = isi_camera_try_fmt,
851 .get_formats = isi_camera_get_formats,
852 .init_videobuf2 = isi_camera_init_videobuf,
853 .poll = isi_camera_poll,
854 .querycap = isi_camera_querycap,
855 .set_bus_param = isi_camera_set_bus_param,
858 /* -----------------------------------------------------------------------*/
859 static int atmel_isi_remove(struct platform_device *pdev)
861 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
862 struct atmel_isi *isi = container_of(soc_host,
863 struct atmel_isi, soc_host);
865 soc_camera_host_unregister(soc_host);
866 vb2_dma_contig_cleanup_ctx(isi->alloc_ctx);
867 dma_free_coherent(&pdev->dev,
868 sizeof(struct fbd) * MAX_BUFFER_NUM,
869 isi->p_fb_descriptors,
870 isi->fb_descriptors_phys);
871 pm_runtime_disable(&pdev->dev);
876 static int atmel_isi_probe_dt(struct atmel_isi *isi,
877 struct platform_device *pdev)
879 struct device_node *np= pdev->dev.of_node;
880 struct v4l2_of_endpoint ep;
883 /* Default settings for ISI */
884 isi->pdata.full_mode = 1;
885 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
887 np = of_graph_get_next_endpoint(np, NULL);
889 dev_err(&pdev->dev, "Could not find the endpoint\n");
893 err = v4l2_of_parse_endpoint(np, &ep);
895 dev_err(&pdev->dev, "Could not parse the endpoint\n");
899 switch (ep.bus.parallel.bus_width) {
901 isi->pdata.data_width_flags = ISI_DATAWIDTH_8;
904 isi->pdata.data_width_flags =
905 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10;
908 dev_err(&pdev->dev, "Unsupported bus width: %d\n",
909 ep.bus.parallel.bus_width);
920 static int atmel_isi_probe(struct platform_device *pdev)
923 struct atmel_isi *isi;
924 struct resource *regs;
926 struct device *dev = &pdev->dev;
927 struct soc_camera_host *soc_host;
928 struct isi_platform_data *pdata;
930 pdata = dev->platform_data;
931 if ((!pdata || !pdata->data_width_flags) && !pdev->dev.of_node) {
933 "No config available for Atmel ISI\n");
937 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
939 dev_err(&pdev->dev, "Can't allocate interface!\n");
943 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk");
944 if (IS_ERR(isi->pclk))
945 return PTR_ERR(isi->pclk);
948 memcpy(&isi->pdata, pdata, sizeof(isi->pdata));
950 ret = atmel_isi_probe_dt(isi, pdev);
956 spin_lock_init(&isi->lock);
957 INIT_LIST_HEAD(&isi->video_buffer_list);
958 INIT_LIST_HEAD(&isi->dma_desc_head);
960 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
961 sizeof(struct fbd) * MAX_BUFFER_NUM,
962 &isi->fb_descriptors_phys,
964 if (!isi->p_fb_descriptors) {
965 dev_err(&pdev->dev, "Can't allocate descriptors!\n");
969 for (i = 0; i < MAX_BUFFER_NUM; i++) {
970 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i;
971 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys +
972 i * sizeof(struct fbd);
973 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head);
976 isi->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
977 if (IS_ERR(isi->alloc_ctx)) {
978 ret = PTR_ERR(isi->alloc_ctx);
982 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
983 isi->regs = devm_ioremap_resource(&pdev->dev, regs);
984 if (IS_ERR(isi->regs)) {
985 ret = PTR_ERR(isi->regs);
989 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8)
990 isi->width_flags = 1 << 7;
991 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10)
992 isi->width_flags |= 1 << 9;
994 irq = platform_get_irq(pdev, 0);
995 if (IS_ERR_VALUE(irq)) {
1000 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi);
1002 dev_err(&pdev->dev, "Unable to request irq %d\n", irq);
1007 soc_host = &isi->soc_host;
1008 soc_host->drv_name = "isi-camera";
1009 soc_host->ops = &isi_soc_camera_host_ops;
1010 soc_host->priv = isi;
1011 soc_host->v4l2_dev.dev = &pdev->dev;
1012 soc_host->nr = pdev->id;
1014 pm_suspend_ignore_children(&pdev->dev, true);
1015 pm_runtime_enable(&pdev->dev);
1017 if (isi->pdata.asd_sizes) {
1018 soc_host->asd = isi->pdata.asd;
1019 soc_host->asd_sizes = isi->pdata.asd_sizes;
1022 ret = soc_camera_host_register(soc_host);
1024 dev_err(&pdev->dev, "Unable to register soc camera host\n");
1025 goto err_register_soc_camera_host;
1029 err_register_soc_camera_host:
1030 pm_runtime_disable(&pdev->dev);
1033 vb2_dma_contig_cleanup_ctx(isi->alloc_ctx);
1035 dma_free_coherent(&pdev->dev,
1036 sizeof(struct fbd) * MAX_BUFFER_NUM,
1037 isi->p_fb_descriptors,
1038 isi->fb_descriptors_phys);
1043 static int atmel_isi_runtime_suspend(struct device *dev)
1045 struct soc_camera_host *soc_host = to_soc_camera_host(dev);
1046 struct atmel_isi *isi = container_of(soc_host,
1047 struct atmel_isi, soc_host);
1049 clk_disable_unprepare(isi->pclk);
1053 static int atmel_isi_runtime_resume(struct device *dev)
1055 struct soc_camera_host *soc_host = to_soc_camera_host(dev);
1056 struct atmel_isi *isi = container_of(soc_host,
1057 struct atmel_isi, soc_host);
1059 return clk_prepare_enable(isi->pclk);
1062 static const struct dev_pm_ops atmel_isi_dev_pm_ops = {
1063 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend,
1064 atmel_isi_runtime_resume, NULL)
1067 static const struct of_device_id atmel_isi_of_match[] = {
1068 { .compatible = "atmel,at91sam9g45-isi" },
1071 MODULE_DEVICE_TABLE(of, atmel_isi_of_match);
1073 static struct platform_driver atmel_isi_driver = {
1074 .remove = atmel_isi_remove,
1076 .name = "atmel_isi",
1077 .of_match_table = of_match_ptr(atmel_isi_of_match),
1078 .pm = &atmel_isi_dev_pm_ops,
1082 module_platform_driver_probe(atmel_isi_driver, atmel_isi_probe);
1084 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
1085 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
1086 MODULE_LICENSE("GPL");
1087 MODULE_SUPPORTED_DEVICE("video");