| /* |
| * V4L2 Driver for PXA camera host |
| * |
| * Copyright (C) 2006, Sascha Hauer, Pengutronix |
| * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/errno.h> |
| #include <linux/fs.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/moduleparam.h> |
| #include <linux/time.h> |
| #include <linux/version.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-dev.h> |
| #include <media/videobuf-dma-sg.h> |
| #include <media/soc_camera.h> |
| #include <media/soc_mediabus.h> |
| |
| #include <linux/videodev2.h> |
| |
| #include <mach/dma.h> |
| #include <mach/camera.h> |
| |
| #define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5) |
| #define PXA_CAM_DRV_NAME "pxa27x-camera" |
| |
| /* Camera Interface */ |
| #define CICR0 0x0000 |
| #define CICR1 0x0004 |
| #define CICR2 0x0008 |
| #define CICR3 0x000C |
| #define CICR4 0x0010 |
| #define CISR 0x0014 |
| #define CIFR 0x0018 |
| #define CITOR 0x001C |
| #define CIBR0 0x0028 |
| #define CIBR1 0x0030 |
| #define CIBR2 0x0038 |
| |
| #define CICR0_DMAEN (1 << 31) /* DMA request enable */ |
| #define CICR0_PAR_EN (1 << 30) /* Parity enable */ |
| #define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */ |
| #define CICR0_ENB (1 << 28) /* Camera interface enable */ |
| #define CICR0_DIS (1 << 27) /* Camera interface disable */ |
| #define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */ |
| #define CICR0_TOM (1 << 9) /* Time-out mask */ |
| #define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */ |
| #define CICR0_FEM (1 << 7) /* FIFO-empty mask */ |
| #define CICR0_EOLM (1 << 6) /* End-of-line mask */ |
| #define CICR0_PERRM (1 << 5) /* Parity-error mask */ |
| #define CICR0_QDM (1 << 4) /* Quick-disable mask */ |
| #define CICR0_CDM (1 << 3) /* Disable-done mask */ |
| #define CICR0_SOFM (1 << 2) /* Start-of-frame mask */ |
| #define CICR0_EOFM (1 << 1) /* End-of-frame mask */ |
| #define CICR0_FOM (1 << 0) /* FIFO-overrun mask */ |
| |
| #define CICR1_TBIT (1 << 31) /* Transparency bit */ |
| #define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */ |
| #define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */ |
| #define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */ |
| #define CICR1_RGB_F (1 << 11) /* RGB format */ |
| #define CICR1_YCBCR_F (1 << 10) /* YCbCr format */ |
| #define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */ |
| #define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */ |
| #define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */ |
| #define CICR1_DW (0x7 << 0) /* Data width mask */ |
| |
| #define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock |
| wait count mask */ |
| #define CICR2_ELW (0xff << 16) /* End-of-line pixel clock |
| wait count mask */ |
| #define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */ |
| #define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock |
| wait count mask */ |
| #define CICR2_FSW (0x7 << 0) /* Frame stabilization |
| wait count mask */ |
| |
| #define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock |
| wait count mask */ |
| #define CICR3_EFW (0xff << 16) /* End-of-frame line clock |
| wait count mask */ |
| #define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */ |
| #define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock |
| wait count mask */ |
| #define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */ |
| |
| #define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */ |
| #define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */ |
| #define CICR4_PCP (1 << 22) /* Pixel clock polarity */ |
| #define CICR4_HSP (1 << 21) /* Horizontal sync polarity */ |
| #define CICR4_VSP (1 << 20) /* Vertical sync polarity */ |
| #define CICR4_MCLK_EN (1 << 19) /* MCLK enable */ |
| #define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */ |
| #define CICR4_DIV (0xff << 0) /* Clock divisor mask */ |
| |
| #define CISR_FTO (1 << 15) /* FIFO time-out */ |
| #define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */ |
| #define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */ |
| #define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */ |
| #define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */ |
| #define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */ |
| #define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */ |
| #define CISR_EOL (1 << 8) /* End of line */ |
| #define CISR_PAR_ERR (1 << 7) /* Parity error */ |
| #define CISR_CQD (1 << 6) /* Camera interface quick disable */ |
| #define CISR_CDD (1 << 5) /* Camera interface disable done */ |
| #define CISR_SOF (1 << 4) /* Start of frame */ |
| #define CISR_EOF (1 << 3) /* End of frame */ |
| #define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */ |
| #define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */ |
| #define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */ |
| |
| #define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */ |
| #define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */ |
| #define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */ |
| #define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */ |
| #define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */ |
| #define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */ |
| #define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */ |
| #define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */ |
| |
| #define CICR0_SIM_MP (0 << 24) |
| #define CICR0_SIM_SP (1 << 24) |
| #define CICR0_SIM_MS (2 << 24) |
| #define CICR0_SIM_EP (3 << 24) |
| #define CICR0_SIM_ES (4 << 24) |
| |
| #define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */ |
| #define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */ |
| #define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */ |
| #define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */ |
| #define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */ |
| |
| #define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */ |
| #define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */ |
| #define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */ |
| #define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */ |
| #define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */ |
| |
| #define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */ |
| #define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */ |
| #define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */ |
| #define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */ |
| |
| #define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \ |
| CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \ |
| CICR0_EOFM | CICR0_FOM) |
| |
| /* |
| * Structures |
| */ |
| enum pxa_camera_active_dma { |
| DMA_Y = 0x1, |
| DMA_U = 0x2, |
| DMA_V = 0x4, |
| }; |
| |
| /* descriptor needed for the PXA DMA engine */ |
| struct pxa_cam_dma { |
| dma_addr_t sg_dma; |
| struct pxa_dma_desc *sg_cpu; |
| size_t sg_size; |
| int sglen; |
| }; |
| |
| /* buffer for one video frame */ |
| struct pxa_buffer { |
| /* common v4l buffer stuff -- must be first */ |
| struct videobuf_buffer vb; |
| enum v4l2_mbus_pixelcode code; |
| /* our descriptor lists for Y, U and V channels */ |
| struct pxa_cam_dma dmas[3]; |
| int inwork; |
| enum pxa_camera_active_dma active_dma; |
| }; |
| |
| struct pxa_camera_dev { |
| struct soc_camera_host soc_host; |
| /* |
| * PXA27x is only supposed to handle one camera on its Quick Capture |
| * interface. If anyone ever builds hardware to enable more than |
| * one camera, they will have to modify this driver too |
| */ |
| struct soc_camera_device *icd; |
| struct clk *clk; |
| |
| unsigned int irq; |
| void __iomem *base; |
| |
| int channels; |
| unsigned int dma_chans[3]; |
| |
| struct pxacamera_platform_data *pdata; |
| struct resource *res; |
| unsigned long platform_flags; |
| unsigned long ciclk; |
| unsigned long mclk; |
| u32 mclk_divisor; |
| |
| struct list_head capture; |
| |
| spinlock_t lock; |
| |
| struct pxa_buffer *active; |
| struct pxa_dma_desc *sg_tail[3]; |
| |
| u32 save_cicr[5]; |
| }; |
| |
| struct pxa_cam { |
| unsigned long flags; |
| }; |
| |
| static const char *pxa_cam_driver_description = "PXA_Camera"; |
| |
| static unsigned int vid_limit = 16; /* Video memory limit, in Mb */ |
| |
| /* |
| * Videobuf operations |
| */ |
| static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, |
| unsigned int *size) |
| { |
| struct soc_camera_device *icd = vq->priv_data; |
| int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| icd->current_fmt->host_fmt); |
| |
| if (bytes_per_line < 0) |
| return bytes_per_line; |
| |
| dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size); |
| |
| *size = bytes_per_line * icd->user_height; |
| |
| if (0 == *count) |
| *count = 32; |
| if (*size * *count > vid_limit * 1024 * 1024) |
| *count = (vid_limit * 1024 * 1024) / *size; |
| |
| return 0; |
| } |
| |
| static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf) |
| { |
| struct soc_camera_device *icd = vq->priv_data; |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); |
| int i; |
| |
| BUG_ON(in_interrupt()); |
| |
| dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
| &buf->vb, buf->vb.baddr, buf->vb.bsize); |
| |
| /* |
| * This waits until this buffer is out of danger, i.e., until it is no |
| * longer in STATE_QUEUED or STATE_ACTIVE |
| */ |
| videobuf_waiton(vq, &buf->vb, 0, 0); |
| videobuf_dma_unmap(vq->dev, dma); |
| videobuf_dma_free(dma); |
| |
| for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) { |
| if (buf->dmas[i].sg_cpu) |
| dma_free_coherent(ici->v4l2_dev.dev, |
| buf->dmas[i].sg_size, |
| buf->dmas[i].sg_cpu, |
| buf->dmas[i].sg_dma); |
| buf->dmas[i].sg_cpu = NULL; |
| } |
| |
| buf->vb.state = VIDEOBUF_NEEDS_INIT; |
| } |
| |
| static int calculate_dma_sglen(struct scatterlist *sglist, int sglen, |
| int sg_first_ofs, int size) |
| { |
| int i, offset, dma_len, xfer_len; |
| struct scatterlist *sg; |
| |
| offset = sg_first_ofs; |
| for_each_sg(sglist, sg, sglen, i) { |
| dma_len = sg_dma_len(sg); |
| |
| /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ |
| xfer_len = roundup(min(dma_len - offset, size), 8); |
| |
| size = max(0, size - xfer_len); |
| offset = 0; |
| if (size == 0) |
| break; |
| } |
| |
| BUG_ON(size != 0); |
| return i + 1; |
| } |
| |
| /** |
| * pxa_init_dma_channel - init dma descriptors |
| * @pcdev: pxa camera device |
| * @buf: pxa buffer to find pxa dma channel |
| * @dma: dma video buffer |
| * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V') |
| * @cibr: camera Receive Buffer Register |
| * @size: bytes to transfer |
| * @sg_first: first element of sg_list |
| * @sg_first_ofs: offset in first element of sg_list |
| * |
| * Prepares the pxa dma descriptors to transfer one camera channel. |
| * Beware sg_first and sg_first_ofs are both input and output parameters. |
| * |
| * Returns 0 or -ENOMEM if no coherent memory is available |
| */ |
| static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev, |
| struct pxa_buffer *buf, |
| struct videobuf_dmabuf *dma, int channel, |
| int cibr, int size, |
| struct scatterlist **sg_first, int *sg_first_ofs) |
| { |
| struct pxa_cam_dma *pxa_dma = &buf->dmas[channel]; |
| struct device *dev = pcdev->soc_host.v4l2_dev.dev; |
| struct scatterlist *sg; |
| int i, offset, sglen; |
| int dma_len = 0, xfer_len = 0; |
| |
| if (pxa_dma->sg_cpu) |
| dma_free_coherent(dev, pxa_dma->sg_size, |
| pxa_dma->sg_cpu, pxa_dma->sg_dma); |
| |
| sglen = calculate_dma_sglen(*sg_first, dma->sglen, |
| *sg_first_ofs, size); |
| |
| pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc); |
| pxa_dma->sg_cpu = dma_alloc_coherent(dev, pxa_dma->sg_size, |
| &pxa_dma->sg_dma, GFP_KERNEL); |
| if (!pxa_dma->sg_cpu) |
| return -ENOMEM; |
| |
| pxa_dma->sglen = sglen; |
| offset = *sg_first_ofs; |
| |
| dev_dbg(dev, "DMA: sg_first=%p, sglen=%d, ofs=%d, dma.desc=%x\n", |
| *sg_first, sglen, *sg_first_ofs, pxa_dma->sg_dma); |
| |
| |
| for_each_sg(*sg_first, sg, sglen, i) { |
| dma_len = sg_dma_len(sg); |
| |
| /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ |
| xfer_len = roundup(min(dma_len - offset, size), 8); |
| |
| size = max(0, size - xfer_len); |
| |
| pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr; |
| pxa_dma->sg_cpu[i].dtadr = sg_dma_address(sg) + offset; |
| pxa_dma->sg_cpu[i].dcmd = |
| DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len; |
| #ifdef DEBUG |
| if (!i) |
| pxa_dma->sg_cpu[i].dcmd |= DCMD_STARTIRQEN; |
| #endif |
| pxa_dma->sg_cpu[i].ddadr = |
| pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc); |
| |
| dev_vdbg(dev, "DMA: desc.%08x->@phys=0x%08x, len=%d\n", |
| pxa_dma->sg_dma + i * sizeof(struct pxa_dma_desc), |
| sg_dma_address(sg) + offset, xfer_len); |
| offset = 0; |
| |
| if (size == 0) |
| break; |
| } |
| |
| pxa_dma->sg_cpu[sglen].ddadr = DDADR_STOP; |
| pxa_dma->sg_cpu[sglen].dcmd = DCMD_FLOWSRC | DCMD_BURST8 | DCMD_ENDIRQEN; |
| |
| /* |
| * Handle 1 special case : |
| * - in 3 planes (YUV422P format), we might finish with xfer_len equal |
| * to dma_len (end on PAGE boundary). In this case, the sg element |
| * for next plane should be the next after the last used to store the |
| * last scatter gather RAM page |
| */ |
| if (xfer_len >= dma_len) { |
| *sg_first_ofs = xfer_len - dma_len; |
| *sg_first = sg_next(sg); |
| } else { |
| *sg_first_ofs = xfer_len; |
| *sg_first = sg; |
| } |
| |
| return 0; |
| } |
| |
| static void pxa_videobuf_set_actdma(struct pxa_camera_dev *pcdev, |
| struct pxa_buffer *buf) |
| { |
| buf->active_dma = DMA_Y; |
| if (pcdev->channels == 3) |
| buf->active_dma |= DMA_U | DMA_V; |
| } |
| |
| /* |
| * Please check the DMA prepared buffer structure in : |
| * Documentation/video4linux/pxa_camera.txt |
| * Please check also in pxa_camera_check_link_miss() to understand why DMA chain |
| * modification while DMA chain is running will work anyway. |
| */ |
| static int pxa_videobuf_prepare(struct videobuf_queue *vq, |
| struct videobuf_buffer *vb, enum v4l2_field field) |
| { |
| struct soc_camera_device *icd = vq->priv_data; |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| struct device *dev = pcdev->soc_host.v4l2_dev.dev; |
| struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
| int ret; |
| int size_y, size_u = 0, size_v = 0; |
| int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
| icd->current_fmt->host_fmt); |
| |
| if (bytes_per_line < 0) |
| return bytes_per_line; |
| |
| dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
| vb, vb->baddr, vb->bsize); |
| |
| /* Added list head initialization on alloc */ |
| WARN_ON(!list_empty(&vb->queue)); |
| |
| #ifdef DEBUG |
| /* |
| * This can be useful if you want to see if we actually fill |
| * the buffer with something |
| */ |
| memset((void *)vb->baddr, 0xaa, vb->bsize); |
| #endif |
| |
| BUG_ON(NULL == icd->current_fmt); |
| |
| /* |
| * I think, in buf_prepare you only have to protect global data, |
| * the actual buffer is yours |
| */ |
| buf->inwork = 1; |
| |
| if (buf->code != icd->current_fmt->code || |
| vb->width != icd->user_width || |
| vb->height != icd->user_height || |
| vb->field != field) { |
| buf->code = icd->current_fmt->code; |
| vb->width = icd->user_width; |
| vb->height = icd->user_height; |
| vb->field = field; |
| vb->state = VIDEOBUF_NEEDS_INIT; |
| } |
| |
| vb->size = bytes_per_line * vb->height; |
| if (0 != vb->baddr && vb->bsize < vb->size) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (vb->state == VIDEOBUF_NEEDS_INIT) { |
| int size = vb->size; |
| int next_ofs = 0; |
| struct videobuf_dmabuf *dma = videobuf_to_dma(vb); |
| struct scatterlist *sg; |
| |
| ret = videobuf_iolock(vq, vb, NULL); |
| if (ret) |
| goto fail; |
| |
| if (pcdev->channels == 3) { |
| size_y = size / 2; |
| size_u = size_v = size / 4; |
| } else { |
| size_y = size; |
| } |
| |
| sg = dma->sglist; |
| |
| /* init DMA for Y channel */ |
| ret = pxa_init_dma_channel(pcdev, buf, dma, 0, CIBR0, size_y, |
| &sg, &next_ofs); |
| if (ret) { |
| dev_err(dev, "DMA initialization for Y/RGB failed\n"); |
| goto fail; |
| } |
| |
| /* init DMA for U channel */ |
| if (size_u) |
| ret = pxa_init_dma_channel(pcdev, buf, dma, 1, CIBR1, |
| size_u, &sg, &next_ofs); |
| if (ret) { |
| dev_err(dev, "DMA initialization for U failed\n"); |
| goto fail_u; |
| } |
| |
| /* init DMA for V channel */ |
| if (size_v) |
| ret = pxa_init_dma_channel(pcdev, buf, dma, 2, CIBR2, |
| size_v, &sg, &next_ofs); |
| if (ret) { |
| dev_err(dev, "DMA initialization for V failed\n"); |
| goto fail_v; |
| } |
| |
| vb->state = VIDEOBUF_PREPARED; |
| } |
| |
| buf->inwork = 0; |
| pxa_videobuf_set_actdma(pcdev, buf); |
| |
| return 0; |
| |
| fail_v: |
| dma_free_coherent(dev, buf->dmas[1].sg_size, |
| buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma); |
| fail_u: |
| dma_free_coherent(dev, buf->dmas[0].sg_size, |
| buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma); |
| fail: |
| free_buffer(vq, buf); |
| out: |
| buf->inwork = 0; |
| return ret; |
| } |
| |
| /** |
| * pxa_dma_start_channels - start DMA channel for active buffer |
| * @pcdev: pxa camera device |
| * |
| * Initialize DMA channels to the beginning of the active video buffer, and |
| * start these channels. |
| */ |
| static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev) |
| { |
| int i; |
| struct pxa_buffer *active; |
| |
| active = pcdev->active; |
| |
| for (i = 0; i < pcdev->channels; i++) { |
| dev_dbg(pcdev->soc_host.v4l2_dev.dev, |
| "%s (channel=%d) ddadr=%08x\n", __func__, |
| i, active->dmas[i].sg_dma); |
| DDADR(pcdev->dma_chans[i]) = active->dmas[i].sg_dma; |
| DCSR(pcdev->dma_chans[i]) = DCSR_RUN; |
| } |
| } |
| |
| static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev) |
| { |
| int i; |
| |
| for (i = 0; i < pcdev->channels; i++) { |
| dev_dbg(pcdev->soc_host.v4l2_dev.dev, |
| "%s (channel=%d)\n", __func__, i); |
| DCSR(pcdev->dma_chans[i]) = 0; |
| } |
| } |
| |
| static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev, |
| struct pxa_buffer *buf) |
| { |
| int i; |
| struct pxa_dma_desc *buf_last_desc; |
| |
| for (i = 0; i < pcdev->channels; i++) { |
| buf_last_desc = buf->dmas[i].sg_cpu + buf->dmas[i].sglen; |
| buf_last_desc->ddadr = DDADR_STOP; |
| |
| if (pcdev->sg_tail[i]) |
| /* Link the new buffer to the old tail */ |
| pcdev->sg_tail[i]->ddadr = buf->dmas[i].sg_dma; |
| |
| /* Update the channel tail */ |
| pcdev->sg_tail[i] = buf_last_desc; |
| } |
| } |
| |
| /** |
| * pxa_camera_start_capture - start video capturing |
| * @pcdev: camera device |
| * |
| * Launch capturing. DMA channels should not be active yet. They should get |
| * activated at the end of frame interrupt, to capture only whole frames, and |
| * never begin the capture of a partial frame. |
| */ |
| static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev) |
| { |
| unsigned long cicr0; |
| |
| dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s\n", __func__); |
| /* Enable End-Of-Frame Interrupt */ |
| cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB; |
| cicr0 &= ~CICR0_EOFM; |
| __raw_writel(cicr0, pcdev->base + CICR0); |
| } |
| |
| static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev) |
| { |
| unsigned long cicr0; |
| |
| pxa_dma_stop_channels(pcdev); |
| |
| cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB; |
| __raw_writel(cicr0, pcdev->base + CICR0); |
| |
| pcdev->active = NULL; |
| dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s\n", __func__); |
| } |
| |
| /* Called under spinlock_irqsave(&pcdev->lock, ...) */ |
| static void pxa_videobuf_queue(struct videobuf_queue *vq, |
| struct videobuf_buffer *vb) |
| { |
| struct soc_camera_device *icd = vq->priv_data; |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
| |
| dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d active=%p\n", |
| __func__, vb, vb->baddr, vb->bsize, pcdev->active); |
| |
| list_add_tail(&vb->queue, &pcdev->capture); |
| |
| vb->state = VIDEOBUF_ACTIVE; |
| pxa_dma_add_tail_buf(pcdev, buf); |
| |
| if (!pcdev->active) |
| pxa_camera_start_capture(pcdev); |
| } |
| |
| static void pxa_videobuf_release(struct videobuf_queue *vq, |
| struct videobuf_buffer *vb) |
| { |
| struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
| #ifdef DEBUG |
| struct soc_camera_device *icd = vq->priv_data; |
| struct device *dev = icd->dev.parent; |
| |
| dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
| vb, vb->baddr, vb->bsize); |
| |
| switch (vb->state) { |
| case VIDEOBUF_ACTIVE: |
| dev_dbg(dev, "%s (active)\n", __func__); |
| break; |
| case VIDEOBUF_QUEUED: |
| dev_dbg(dev, "%s (queued)\n", __func__); |
| break; |
| case VIDEOBUF_PREPARED: |
| dev_dbg(dev, "%s (prepared)\n", __func__); |
| break; |
| default: |
| dev_dbg(dev, "%s (unknown)\n", __func__); |
| break; |
| } |
| #endif |
| |
| free_buffer(vq, buf); |
| } |
| |
| static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, |
| struct videobuf_buffer *vb, |
| struct pxa_buffer *buf) |
| { |
| int i; |
| |
| /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ |
| list_del_init(&vb->queue); |
| vb->state = VIDEOBUF_DONE; |
| do_gettimeofday(&vb->ts); |
| vb->field_count++; |
| wake_up(&vb->done); |
| dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s dequeud buffer (vb=0x%p)\n", |
| __func__, vb); |
| |
| if (list_empty(&pcdev->capture)) { |
| pxa_camera_stop_capture(pcdev); |
| for (i = 0; i < pcdev->channels; i++) |
| pcdev->sg_tail[i] = NULL; |
| return; |
| } |
| |
| pcdev->active = list_entry(pcdev->capture.next, |
| struct pxa_buffer, vb.queue); |
| } |
| |
| /** |
| * pxa_camera_check_link_miss - check missed DMA linking |
| * @pcdev: camera device |
| * |
| * The DMA chaining is done with DMA running. This means a tiny temporal window |
| * remains, where a buffer is queued on the chain, while the chain is already |
| * stopped. This means the tailed buffer would never be transfered by DMA. |
| * This function restarts the capture for this corner case, where : |
| * - DADR() == DADDR_STOP |
| * - a videobuffer is queued on the pcdev->capture list |
| * |
| * Please check the "DMA hot chaining timeslice issue" in |
| * Documentation/video4linux/pxa_camera.txt |
| * |
| * Context: should only be called within the dma irq handler |
| */ |
| static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev) |
| { |
| int i, is_dma_stopped = 1; |
| |
| for (i = 0; i < pcdev->channels; i++) |
| if (DDADR(pcdev->dma_chans[i]) != DDADR_STOP) |
| is_dma_stopped = 0; |
| dev_dbg(pcdev->soc_host.v4l2_dev.dev, |
| "%s : top queued buffer=%p, dma_stopped=%d\n", |
| __func__, pcdev->active, is_dma_stopped); |
| if (pcdev->active && is_dma_stopped) |
| pxa_camera_start_capture(pcdev); |
| } |
| |
| static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, |
| enum pxa_camera_active_dma act_dma) |
| { |
| struct device *dev = pcdev->soc_host.v4l2_dev.dev; |
| struct pxa_buffer *buf; |
| unsigned long flags; |
| u32 status, camera_status, overrun; |
| struct videobuf_buffer *vb; |
| |
| spin_lock_irqsave(&pcdev->lock, flags); |
| |
| status = DCSR(channel); |
| DCSR(channel) = status; |
| |
| camera_status = __raw_readl(pcdev->base + CISR); |
| overrun = CISR_IFO_0; |
| if (pcdev->channels == 3) |
| overrun |= CISR_IFO_1 | CISR_IFO_2; |
| |
| if (status & DCSR_BUSERR) { |
| dev_err(dev, "DMA Bus Error IRQ!\n"); |
| goto out; |
| } |
| |
| if (!(status & (DCSR_ENDINTR | DCSR_STARTINTR))) { |
| dev_err(dev, "Unknown DMA IRQ source, status: 0x%08x\n", |
| status); |
| goto out; |
| } |
| |
| /* |
| * pcdev->active should not be NULL in DMA irq handler. |
| * |
| * But there is one corner case : if capture was stopped due to an |
| * overrun of channel 1, and at that same channel 2 was completed. |
| * |
| * When handling the overrun in DMA irq for channel 1, we'll stop the |
| * capture and restart it (and thus set pcdev->active to NULL). But the |
| * DMA irq handler will already be pending for channel 2. So on entering |
| * the DMA irq handler for channel 2 there will be no active buffer, yet |
| * that is normal. |
| */ |
| if (!pcdev->active) |
| goto out; |
| |
| vb = &pcdev->active->vb; |
| buf = container_of(vb, struct pxa_buffer, vb); |
| WARN_ON(buf->inwork || list_empty(&vb->queue)); |
| |
| dev_dbg(dev, "%s channel=%d %s%s(vb=0x%p) dma.desc=%x\n", |
| __func__, channel, status & DCSR_STARTINTR ? "SOF " : "", |
| status & DCSR_ENDINTR ? "EOF " : "", vb, DDADR(channel)); |
| |
| if (status & DCSR_ENDINTR) { |
| /* |
| * It's normal if the last frame creates an overrun, as there |
| * are no more DMA descriptors to fetch from QCI fifos |
| */ |
| if (camera_status & overrun && |
| !list_is_last(pcdev->capture.next, &pcdev->capture)) { |
| dev_dbg(dev, "FIFO overrun! CISR: %x\n", |
| camera_status); |
| pxa_camera_stop_capture(pcdev); |
| pxa_camera_start_capture(pcdev); |
| goto out; |
| } |
| buf->active_dma &= ~act_dma; |
| if (!buf->active_dma) { |
| pxa_camera_wakeup(pcdev, vb, buf); |
| pxa_camera_check_link_miss(pcdev); |
| } |
| } |
| |
| out: |
| spin_unlock_irqrestore(&pcdev->lock, flags); |
| } |
| |
| static void pxa_camera_dma_irq_y(int channel, void *data) |
| { |
| struct pxa_camera_dev *pcdev = data; |
| pxa_camera_dma_irq(channel, pcdev, DMA_Y); |
| } |
| |
| static void pxa_camera_dma_irq_u(int channel, void *data) |
| { |
| struct pxa_camera_dev *pcdev = data; |
| pxa_camera_dma_irq(channel, pcdev, DMA_U); |
| } |
| |
| static void pxa_camera_dma_irq_v(int channel, void *data) |
| { |
| struct pxa_camera_dev *pcdev = data; |
| pxa_camera_dma_irq(channel, pcdev, DMA_V); |
| } |
| |
| static struct videobuf_queue_ops pxa_videobuf_ops = { |
| .buf_setup = pxa_videobuf_setup, |
| .buf_prepare = pxa_videobuf_prepare, |
| .buf_queue = pxa_videobuf_queue, |
| .buf_release = pxa_videobuf_release, |
| }; |
| |
| static void pxa_camera_init_videobuf(struct videobuf_queue *q, |
| struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| |
| /* |
| * We must pass NULL as dev pointer, then all pci_* dma operations |
| * transform to normal dma_* ones. |
| */ |
| videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock, |
| V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, |
| sizeof(struct pxa_buffer), icd); |
| } |
| |
| static u32 mclk_get_divisor(struct platform_device *pdev, |
| struct pxa_camera_dev *pcdev) |
| { |
| unsigned long mclk = pcdev->mclk; |
| struct device *dev = &pdev->dev; |
| u32 div; |
| unsigned long lcdclk; |
| |
| lcdclk = clk_get_rate(pcdev->clk); |
| pcdev->ciclk = lcdclk; |
| |
| /* mclk <= ciclk / 4 (27.4.2) */ |
| if (mclk > lcdclk / 4) { |
| mclk = lcdclk / 4; |
| dev_warn(dev, "Limiting master clock to %lu\n", mclk); |
| } |
| |
| /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */ |
| div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1; |
| |
| /* If we're not supplying MCLK, leave it at 0 */ |
| if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| pcdev->mclk = lcdclk / (2 * (div + 1)); |
| |
| dev_dbg(dev, "LCD clock %luHz, target freq %luHz, divisor %u\n", |
| lcdclk, mclk, div); |
| |
| return div; |
| } |
| |
| static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev, |
| unsigned long pclk) |
| { |
| /* We want a timeout > 1 pixel time, not ">=" */ |
| u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1; |
| |
| __raw_writel(ciclk_per_pixel, pcdev->base + CITOR); |
| } |
| |
| static void pxa_camera_activate(struct pxa_camera_dev *pcdev) |
| { |
| u32 cicr4 = 0; |
| |
| /* disable all interrupts */ |
| __raw_writel(0x3ff, pcdev->base + CICR0); |
| |
| if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| cicr4 |= CICR4_PCLK_EN; |
| if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| cicr4 |= CICR4_MCLK_EN; |
| if (pcdev->platform_flags & PXA_CAMERA_PCP) |
| cicr4 |= CICR4_PCP; |
| if (pcdev->platform_flags & PXA_CAMERA_HSP) |
| cicr4 |= CICR4_HSP; |
| if (pcdev->platform_flags & PXA_CAMERA_VSP) |
| cicr4 |= CICR4_VSP; |
| |
| __raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4); |
| |
| if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| /* Initialise the timeout under the assumption pclk = mclk */ |
| recalculate_fifo_timeout(pcdev, pcdev->mclk); |
| else |
| /* "Safe default" - 13MHz */ |
| recalculate_fifo_timeout(pcdev, 13000000); |
| |
| clk_enable(pcdev->clk); |
| } |
| |
| static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev) |
| { |
| clk_disable(pcdev->clk); |
| } |
| |
| static irqreturn_t pxa_camera_irq(int irq, void *data) |
| { |
| struct pxa_camera_dev *pcdev = data; |
| unsigned long status, cifr, cicr0; |
| struct pxa_buffer *buf; |
| struct videobuf_buffer *vb; |
| |
| status = __raw_readl(pcdev->base + CISR); |
| dev_dbg(pcdev->soc_host.v4l2_dev.dev, |
| "Camera interrupt status 0x%lx\n", status); |
| |
| if (!status) |
| return IRQ_NONE; |
| |
| __raw_writel(status, pcdev->base + CISR); |
| |
| if (status & CISR_EOF) { |
| /* Reset the FIFOs */ |
| cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F; |
| __raw_writel(cifr, pcdev->base + CIFR); |
| |
| pcdev->active = list_first_entry(&pcdev->capture, |
| struct pxa_buffer, vb.queue); |
| vb = &pcdev->active->vb; |
| buf = container_of(vb, struct pxa_buffer, vb); |
| pxa_videobuf_set_actdma(pcdev, buf); |
| |
| pxa_dma_start_channels(pcdev); |
| |
| cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM; |
| __raw_writel(cicr0, pcdev->base + CICR0); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * The following two functions absolutely depend on the fact, that |
| * there can be only one camera on PXA quick capture interface |
| * Called with .video_lock held |
| */ |
| static int pxa_camera_add_device(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| |
| if (pcdev->icd) |
| return -EBUSY; |
| |
| pxa_camera_activate(pcdev); |
| |
| pcdev->icd = icd; |
| |
| dev_info(icd->dev.parent, "PXA Camera driver attached to camera %d\n", |
| icd->devnum); |
| |
| return 0; |
| } |
| |
| /* Called with .video_lock held */ |
| static void pxa_camera_remove_device(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| |
| BUG_ON(icd != pcdev->icd); |
| |
| dev_info(icd->dev.parent, "PXA Camera driver detached from camera %d\n", |
| icd->devnum); |
| |
| /* disable capture, disable interrupts */ |
| __raw_writel(0x3ff, pcdev->base + CICR0); |
| |
| /* Stop DMA engine */ |
| DCSR(pcdev->dma_chans[0]) = 0; |
| DCSR(pcdev->dma_chans[1]) = 0; |
| DCSR(pcdev->dma_chans[2]) = 0; |
| |
| pxa_camera_deactivate(pcdev); |
| |
| pcdev->icd = NULL; |
| } |
| |
| static int test_platform_param(struct pxa_camera_dev *pcdev, |
| unsigned char buswidth, unsigned long *flags) |
| { |
| /* |
| * Platform specified synchronization and pixel clock polarities are |
| * only a recommendation and are only used during probing. The PXA270 |
| * quick capture interface supports both. |
| */ |
| *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ? |
| SOCAM_MASTER : SOCAM_SLAVE) | |
| SOCAM_HSYNC_ACTIVE_HIGH | |
| SOCAM_HSYNC_ACTIVE_LOW | |
| SOCAM_VSYNC_ACTIVE_HIGH | |
| SOCAM_VSYNC_ACTIVE_LOW | |
| SOCAM_DATA_ACTIVE_HIGH | |
| SOCAM_PCLK_SAMPLE_RISING | |
| SOCAM_PCLK_SAMPLE_FALLING; |
| |
| /* If requested data width is supported by the platform, use it */ |
| switch (buswidth) { |
| case 10: |
| if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)) |
| return -EINVAL; |
| *flags |= SOCAM_DATAWIDTH_10; |
| break; |
| case 9: |
| if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)) |
| return -EINVAL; |
| *flags |= SOCAM_DATAWIDTH_9; |
| break; |
| case 8: |
| if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)) |
| return -EINVAL; |
| *flags |= SOCAM_DATAWIDTH_8; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static void pxa_camera_setup_cicr(struct soc_camera_device *icd, |
| unsigned long flags, __u32 pixfmt) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| unsigned long dw, bpp; |
| u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0, y_skip_top; |
| int ret = v4l2_subdev_call(sd, sensor, g_skip_top_lines, &y_skip_top); |
| |
| if (ret < 0) |
| y_skip_top = 0; |
| |
| /* |
| * Datawidth is now guaranteed to be equal to one of the three values. |
| * We fix bit-per-pixel equal to data-width... |
| */ |
| switch (flags & SOCAM_DATAWIDTH_MASK) { |
| case SOCAM_DATAWIDTH_10: |
| dw = 4; |
| bpp = 0x40; |
| break; |
| case SOCAM_DATAWIDTH_9: |
| dw = 3; |
| bpp = 0x20; |
| break; |
| default: |
| /* |
| * Actually it can only be 8 now, |
| * default is just to silence compiler warnings |
| */ |
| case SOCAM_DATAWIDTH_8: |
| dw = 2; |
| bpp = 0; |
| } |
| |
| if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| cicr4 |= CICR4_PCLK_EN; |
| if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| cicr4 |= CICR4_MCLK_EN; |
| if (flags & SOCAM_PCLK_SAMPLE_FALLING) |
| cicr4 |= CICR4_PCP; |
| if (flags & SOCAM_HSYNC_ACTIVE_LOW) |
| cicr4 |= CICR4_HSP; |
| if (flags & SOCAM_VSYNC_ACTIVE_LOW) |
| cicr4 |= CICR4_VSP; |
| |
| cicr0 = __raw_readl(pcdev->base + CICR0); |
| if (cicr0 & CICR0_ENB) |
| __raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0); |
| |
| cicr1 = CICR1_PPL_VAL(icd->user_width - 1) | bpp | dw; |
| |
| switch (pixfmt) { |
| case V4L2_PIX_FMT_YUV422P: |
| pcdev->channels = 3; |
| cicr1 |= CICR1_YCBCR_F; |
| /* |
| * Normally, pxa bus wants as input UYVY format. We allow all |
| * reorderings of the YUV422 format, as no processing is done, |
| * and the YUV stream is just passed through without any |
| * transformation. Note that UYVY is the only format that |
| * should be used if pxa framebuffer Overlay2 is used. |
| */ |
| case V4L2_PIX_FMT_UYVY: |
| case V4L2_PIX_FMT_VYUY: |
| case V4L2_PIX_FMT_YUYV: |
| case V4L2_PIX_FMT_YVYU: |
| cicr1 |= CICR1_COLOR_SP_VAL(2); |
| break; |
| case V4L2_PIX_FMT_RGB555: |
| cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) | |
| CICR1_TBIT | CICR1_COLOR_SP_VAL(1); |
| break; |
| case V4L2_PIX_FMT_RGB565: |
| cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2); |
| break; |
| } |
| |
| cicr2 = 0; |
| cicr3 = CICR3_LPF_VAL(icd->user_height - 1) | |
| CICR3_BFW_VAL(min((u32)255, y_skip_top)); |
| cicr4 |= pcdev->mclk_divisor; |
| |
| __raw_writel(cicr1, pcdev->base + CICR1); |
| __raw_writel(cicr2, pcdev->base + CICR2); |
| __raw_writel(cicr3, pcdev->base + CICR3); |
| __raw_writel(cicr4, pcdev->base + CICR4); |
| |
| /* CIF interrupts are not used, only DMA */ |
| cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ? |
| CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)); |
| cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK; |
| __raw_writel(cicr0, pcdev->base + CICR0); |
| } |
| |
| static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| unsigned long bus_flags, camera_flags, common_flags; |
| const struct soc_mbus_pixelfmt *fmt; |
| int ret; |
| struct pxa_cam *cam = icd->host_priv; |
| |
| fmt = soc_mbus_get_fmtdesc(icd->current_fmt->code); |
| if (!fmt) |
| return -EINVAL; |
| |
| ret = test_platform_param(pcdev, fmt->bits_per_sample, &bus_flags); |
| if (ret < 0) |
| return ret; |
| |
| camera_flags = icd->ops->query_bus_param(icd); |
| |
| common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags); |
| if (!common_flags) |
| return -EINVAL; |
| |
| pcdev->channels = 1; |
| |
| /* Make choises, based on platform preferences */ |
| if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && |
| (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { |
| if (pcdev->platform_flags & PXA_CAMERA_HSP) |
| common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; |
| else |
| common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; |
| } |
| |
| if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && |
| (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { |
| if (pcdev->platform_flags & PXA_CAMERA_VSP) |
| common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; |
| else |
| common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; |
| } |
| |
| if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && |
| (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { |
| if (pcdev->platform_flags & PXA_CAMERA_PCP) |
| common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; |
| else |
| common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; |
| } |
| |
| cam->flags = common_flags; |
| |
| ret = icd->ops->set_bus_param(icd, common_flags); |
| if (ret < 0) |
| return ret; |
| |
| pxa_camera_setup_cicr(icd, common_flags, pixfmt); |
| |
| return 0; |
| } |
| |
| static int pxa_camera_try_bus_param(struct soc_camera_device *icd, |
| unsigned char buswidth) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| unsigned long bus_flags, camera_flags; |
| int ret = test_platform_param(pcdev, buswidth, &bus_flags); |
| |
| if (ret < 0) |
| return ret; |
| |
| camera_flags = icd->ops->query_bus_param(icd); |
| |
| return soc_camera_bus_param_compatible(camera_flags, bus_flags) ? 0 : -EINVAL; |
| } |
| |
| static const struct soc_mbus_pixelfmt pxa_camera_formats[] = { |
| { |
| .fourcc = V4L2_PIX_FMT_YUV422P, |
| .name = "Planar YUV422 16 bit", |
| .bits_per_sample = 8, |
| .packing = SOC_MBUS_PACKING_2X8_PADHI, |
| .order = SOC_MBUS_ORDER_LE, |
| }, |
| }; |
| |
| /* This will be corrected as we get more formats */ |
| static bool pxa_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt) |
| { |
| return fmt->packing == SOC_MBUS_PACKING_NONE || |
| (fmt->bits_per_sample == 8 && |
| fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) || |
| (fmt->bits_per_sample > 8 && |
| fmt->packing == SOC_MBUS_PACKING_EXTEND16); |
| } |
| |
| static int pxa_camera_get_formats(struct soc_camera_device *icd, unsigned int idx, |
| struct soc_camera_format_xlate *xlate) |
| { |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| struct device *dev = icd->dev.parent; |
| int formats = 0, ret; |
| struct pxa_cam *cam; |
| enum v4l2_mbus_pixelcode code; |
| const struct soc_mbus_pixelfmt *fmt; |
| |
| ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code); |
| if (ret < 0) |
| /* No more formats */ |
| return 0; |
| |
| fmt = soc_mbus_get_fmtdesc(code); |
| if (!fmt) { |
| dev_err(dev, "Invalid format code #%u: %d\n", idx, code); |
| return 0; |
| } |
| |
| /* This also checks support for the requested bits-per-sample */ |
| ret = pxa_camera_try_bus_param(icd, fmt->bits_per_sample); |
| if (ret < 0) |
| return 0; |
| |
| if (!icd->host_priv) { |
| cam = kzalloc(sizeof(*cam), GFP_KERNEL); |
| if (!cam) |
| return -ENOMEM; |
| |
| icd->host_priv = cam; |
| } else { |
| cam = icd->host_priv; |
| } |
| |
| switch (code) { |
| case V4L2_MBUS_FMT_UYVY8_2X8: |
| formats++; |
| if (xlate) { |
| xlate->host_fmt = &pxa_camera_formats[0]; |
| xlate->code = code; |
| xlate++; |
| dev_dbg(dev, "Providing format %s using code %d\n", |
| pxa_camera_formats[0].name, code); |
| } |
| case V4L2_MBUS_FMT_VYUY8_2X8: |
| case V4L2_MBUS_FMT_YUYV8_2X8: |
| case V4L2_MBUS_FMT_YVYU8_2X8: |
| case V4L2_MBUS_FMT_RGB565_2X8_LE: |
| case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE: |
| if (xlate) |
| dev_dbg(dev, "Providing format %s packed\n", |
| fmt->name); |
| break; |
| default: |
| if (!pxa_camera_packing_supported(fmt)) |
| return 0; |
| if (xlate) |
| dev_dbg(dev, |
| "Providing format %s in pass-through mode\n", |
| fmt->name); |
| } |
| |
| /* Generic pass-through */ |
| formats++; |
| if (xlate) { |
| xlate->host_fmt = fmt; |
| xlate->code = code; |
| xlate++; |
| } |
| |
| return formats; |
| } |
| |
| static void pxa_camera_put_formats(struct soc_camera_device *icd) |
| { |
| kfree(icd->host_priv); |
| icd->host_priv = NULL; |
| } |
| |
| static int pxa_camera_check_frame(u32 width, u32 height) |
| { |
| /* limit to pxa hardware capabilities */ |
| return height < 32 || height > 2048 || width < 48 || width > 2048 || |
| (width & 0x01); |
| } |
| |
| static int pxa_camera_set_crop(struct soc_camera_device *icd, |
| struct v4l2_crop *a) |
| { |
| struct v4l2_rect *rect = &a->c; |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| struct device *dev = icd->dev.parent; |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| struct soc_camera_sense sense = { |
| .master_clock = pcdev->mclk, |
| .pixel_clock_max = pcdev->ciclk / 4, |
| }; |
| struct v4l2_mbus_framefmt mf; |
| struct pxa_cam *cam = icd->host_priv; |
| u32 fourcc = icd->current_fmt->host_fmt->fourcc; |
| int ret; |
| |
| /* If PCLK is used to latch data from the sensor, check sense */ |
| if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| icd->sense = &sense; |
| |
| ret = v4l2_subdev_call(sd, video, s_crop, a); |
| |
| icd->sense = NULL; |
| |
| if (ret < 0) { |
| dev_warn(dev, "Failed to crop to %ux%u@%u:%u\n", |
| rect->width, rect->height, rect->left, rect->top); |
| return ret; |
| } |
| |
| ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| |
| if (pxa_camera_check_frame(mf.width, mf.height)) { |
| /* |
| * Camera cropping produced a frame beyond our capabilities. |
| * FIXME: just extract a subframe, that we can process. |
| */ |
| v4l_bound_align_image(&mf.width, 48, 2048, 1, |
| &mf.height, 32, 2048, 0, |
| fourcc == V4L2_PIX_FMT_YUV422P ? 4 : 0); |
| ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| |
| if (pxa_camera_check_frame(mf.width, mf.height)) { |
| dev_warn(icd->dev.parent, |
| "Inconsistent state. Use S_FMT to repair\n"); |
| return -EINVAL; |
| } |
| } |
| |
| if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) { |
| if (sense.pixel_clock > sense.pixel_clock_max) { |
| dev_err(dev, |
| "pixel clock %lu set by the camera too high!", |
| sense.pixel_clock); |
| return -EIO; |
| } |
| recalculate_fifo_timeout(pcdev, sense.pixel_clock); |
| } |
| |
| icd->user_width = mf.width; |
| icd->user_height = mf.height; |
| |
| pxa_camera_setup_cicr(icd, cam->flags, fourcc); |
| |
| return ret; |
| } |
| |
| static int pxa_camera_set_fmt(struct soc_camera_device *icd, |
| struct v4l2_format *f) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| struct device *dev = icd->dev.parent; |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| const struct soc_camera_format_xlate *xlate = NULL; |
| struct soc_camera_sense sense = { |
| .master_clock = pcdev->mclk, |
| .pixel_clock_max = pcdev->ciclk / 4, |
| }; |
| struct v4l2_pix_format *pix = &f->fmt.pix; |
| struct v4l2_mbus_framefmt mf; |
| int ret; |
| |
| xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
| if (!xlate) { |
| dev_warn(dev, "Format %x not found\n", pix->pixelformat); |
| return -EINVAL; |
| } |
| |
| /* If PCLK is used to latch data from the sensor, check sense */ |
| if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| /* The caller holds a mutex. */ |
| icd->sense = &sense; |
| |
| mf.width = pix->width; |
| mf.height = pix->height; |
| mf.field = pix->field; |
| mf.colorspace = pix->colorspace; |
| mf.code = xlate->code; |
| |
| ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf); |
| |
| if (mf.code != xlate->code) |
| return -EINVAL; |
| |
| icd->sense = NULL; |
| |
| if (ret < 0) { |
| dev_warn(dev, "Failed to configure for format %x\n", |
| pix->pixelformat); |
| } else if (pxa_camera_check_frame(mf.width, mf.height)) { |
| dev_warn(dev, |
| "Camera driver produced an unsupported frame %dx%d\n", |
| mf.width, mf.height); |
| ret = -EINVAL; |
| } else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) { |
| if (sense.pixel_clock > sense.pixel_clock_max) { |
| dev_err(dev, |
| "pixel clock %lu set by the camera too high!", |
| sense.pixel_clock); |
| return -EIO; |
| } |
| recalculate_fifo_timeout(pcdev, sense.pixel_clock); |
| } |
| |
| if (ret < 0) |
| return ret; |
| |
| pix->width = mf.width; |
| pix->height = mf.height; |
| pix->field = mf.field; |
| pix->colorspace = mf.colorspace; |
| icd->current_fmt = xlate; |
| |
| return ret; |
| } |
| |
| static int pxa_camera_try_fmt(struct soc_camera_device *icd, |
| struct v4l2_format *f) |
| { |
| struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
| const struct soc_camera_format_xlate *xlate; |
| struct v4l2_pix_format *pix = &f->fmt.pix; |
| struct v4l2_mbus_framefmt mf; |
| __u32 pixfmt = pix->pixelformat; |
| int ret; |
| |
| xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| if (!xlate) { |
| dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt); |
| return -EINVAL; |
| } |
| |
| /* |
| * Limit to pxa hardware capabilities. YUV422P planar format requires |
| * images size to be a multiple of 16 bytes. If not, zeros will be |
| * inserted between Y and U planes, and U and V planes, which violates |
| * the YUV422P standard. |
| */ |
| v4l_bound_align_image(&pix->width, 48, 2048, 1, |
| &pix->height, 32, 2048, 0, |
| pixfmt == V4L2_PIX_FMT_YUV422P ? 4 : 0); |
| |
| pix->bytesperline = soc_mbus_bytes_per_line(pix->width, |
| xlate->host_fmt); |
| if (pix->bytesperline < 0) |
| return pix->bytesperline; |
| pix->sizeimage = pix->height * pix->bytesperline; |
| |
| /* limit to sensor capabilities */ |
| mf.width = pix->width; |
| mf.height = pix->height; |
| mf.field = pix->field; |
| mf.colorspace = pix->colorspace; |
| mf.code = xlate->code; |
| |
| ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf); |
| if (ret < 0) |
| return ret; |
| |
| pix->width = mf.width; |
| pix->height = mf.height; |
| pix->colorspace = mf.colorspace; |
| |
| switch (mf.field) { |
| case V4L2_FIELD_ANY: |
| case V4L2_FIELD_NONE: |
| pix->field = V4L2_FIELD_NONE; |
| break; |
| default: |
| /* TODO: support interlaced at least in pass-through mode */ |
| dev_err(icd->dev.parent, "Field type %d unsupported.\n", |
| mf.field); |
| return -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static int pxa_camera_reqbufs(struct soc_camera_device *icd, |
| struct v4l2_requestbuffers *p) |
| { |
| int i; |
| |
| /* |
| * This is for locking debugging only. I removed spinlocks and now I |
| * check whether .prepare is ever called on a linked buffer, or whether |
| * a dma IRQ can occur for an in-work or unlinked buffer. Until now |
| * it hadn't triggered |
| */ |
| for (i = 0; i < p->count; i++) { |
| struct pxa_buffer *buf = container_of(icd->vb_vidq.bufs[i], |
| struct pxa_buffer, vb); |
| buf->inwork = 0; |
| INIT_LIST_HEAD(&buf->vb.queue); |
| } |
| |
| return 0; |
| } |
| |
| static unsigned int pxa_camera_poll(struct file *file, poll_table *pt) |
| { |
| struct soc_camera_device *icd = file->private_data; |
| struct pxa_buffer *buf; |
| |
| buf = list_entry(icd->vb_vidq.stream.next, struct pxa_buffer, |
| vb.stream); |
| |
| poll_wait(file, &buf->vb.done, pt); |
| |
| if (buf->vb.state == VIDEOBUF_DONE || |
| buf->vb.state == VIDEOBUF_ERROR) |
| return POLLIN|POLLRDNORM; |
| |
| return 0; |
| } |
| |
| static int pxa_camera_querycap(struct soc_camera_host *ici, |
| struct v4l2_capability *cap) |
| { |
| /* cap->name is set by the firendly caller:-> */ |
| strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card)); |
| cap->version = PXA_CAM_VERSION_CODE; |
| cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| |
| return 0; |
| } |
| |
| static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| int i = 0, ret = 0; |
| |
| pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0); |
| pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1); |
| pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2); |
| pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3); |
| pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4); |
| |
| if ((pcdev->icd) && (pcdev->icd->ops->suspend)) |
| ret = pcdev->icd->ops->suspend(pcdev->icd, state); |
| |
| return ret; |
| } |
| |
| static int pxa_camera_resume(struct soc_camera_device *icd) |
| { |
| struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| struct pxa_camera_dev *pcdev = ici->priv; |
| int i = 0, ret = 0; |
| |
| DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
| DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD; |
| DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD; |
| |
| __raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0); |
| __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1); |
| __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2); |
| __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3); |
| __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4); |
| |
| if ((pcdev->icd) && (pcdev->icd->ops->resume)) |
| ret = pcdev->icd->ops->resume(pcdev->icd); |
| |
| /* Restart frame capture if active buffer exists */ |
| if (!ret && pcdev->active) |
| pxa_camera_start_capture(pcdev); |
| |
| return ret; |
| } |
| |
| static struct soc_camera_host_ops pxa_soc_camera_host_ops = { |
| .owner = THIS_MODULE, |
| .add = pxa_camera_add_device, |
| .remove = pxa_camera_remove_device, |
| .suspend = pxa_camera_suspend, |
| .resume = pxa_camera_resume, |
| .set_crop = pxa_camera_set_crop, |
| .get_formats = pxa_camera_get_formats, |
| .put_formats = pxa_camera_put_formats, |
| .set_fmt = pxa_camera_set_fmt, |
| .try_fmt = pxa_camera_try_fmt, |
| .init_videobuf = pxa_camera_init_videobuf, |
| .reqbufs = pxa_camera_reqbufs, |
| .poll = pxa_camera_poll, |
| .querycap = pxa_camera_querycap, |
| .set_bus_param = pxa_camera_set_bus_param, |
| }; |
| |
| static int __devinit pxa_camera_probe(struct platform_device *pdev) |
| { |
| struct pxa_camera_dev *pcdev; |
| struct resource *res; |
| void __iomem *base; |
| int irq; |
| int err = 0; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| irq = platform_get_irq(pdev, 0); |
| if (!res || irq < 0) { |
| err = -ENODEV; |
| goto exit; |
| } |
| |
| pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); |
| if (!pcdev) { |
| dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
| err = -ENOMEM; |
| goto exit; |
| } |
| |
| pcdev->clk = clk_get(&pdev->dev, NULL); |
| if (IS_ERR(pcdev->clk)) { |
| err = PTR_ERR(pcdev->clk); |
| goto exit_kfree; |
| } |
| |
| pcdev->res = res; |
| |
| pcdev->pdata = pdev->dev.platform_data; |
| pcdev->platform_flags = pcdev->pdata->flags; |
| if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 | |
| PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) { |
| /* |
| * Platform hasn't set available data widths. This is bad. |
| * Warn and use a default. |
| */ |
| dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " |
| "data widths, using default 10 bit\n"); |
| pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10; |
| } |
| pcdev->mclk = pcdev->pdata->mclk_10khz * 10000; |
| if (!pcdev->mclk) { |
| dev_warn(&pdev->dev, |
| "mclk == 0! Please, fix your platform data. " |
| "Using default 20MHz\n"); |
| pcdev->mclk = 20000000; |
| } |
| |
| pcdev->mclk_divisor = mclk_get_divisor(pdev, pcdev); |
| |
| INIT_LIST_HEAD(&pcdev->capture); |
| spin_lock_init(&pcdev->lock); |
| |
| /* |
| * Request the regions. |
| */ |
| if (!request_mem_region(res->start, resource_size(res), |
| PXA_CAM_DRV_NAME)) { |
| err = -EBUSY; |
| goto exit_clk; |
| } |
| |
| base = ioremap(res->start, resource_size(res)); |
| if (!base) { |
| err = -ENOMEM; |
| goto exit_release; |
| } |
| pcdev->irq = irq; |
| pcdev->base = base; |
| |
| /* request dma */ |
| err = pxa_request_dma("CI_Y", DMA_PRIO_HIGH, |
| pxa_camera_dma_irq_y, pcdev); |
| if (err < 0) { |
| dev_err(&pdev->dev, "Can't request DMA for Y\n"); |
| goto exit_iounmap; |
| } |
| pcdev->dma_chans[0] = err; |
| dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]); |
| |
| err = pxa_request_dma("CI_U", DMA_PRIO_HIGH, |
| pxa_camera_dma_irq_u, pcdev); |
| if (err < 0) { |
| dev_err(&pdev->dev, "Can't request DMA for U\n"); |
| goto exit_free_dma_y; |
| } |
| pcdev->dma_chans[1] = err; |
| dev_dbg(&pdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]); |
| |
| err = pxa_request_dma("CI_V", DMA_PRIO_HIGH, |
| pxa_camera_dma_irq_v, pcdev); |
| if (err < 0) { |
| dev_err(&pdev->dev, "Can't request DMA for V\n"); |
| goto exit_free_dma_u; |
| } |
| pcdev->dma_chans[2] = err; |
| dev_dbg(&pdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]); |
| |
| DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
| DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD; |
| DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD; |
| |
| /* request irq */ |
| err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME, |
| pcdev); |
| if (err) { |
| dev_err(&pdev->dev, "Camera interrupt register failed \n"); |
| goto exit_free_dma; |
| } |
| |
| pcdev->soc_host.drv_name = PXA_CAM_DRV_NAME; |
| pcdev->soc_host.ops = &pxa_soc_camera_host_ops; |
| pcdev->soc_host.priv = pcdev; |
| pcdev->soc_host.v4l2_dev.dev = &pdev->dev; |
| pcdev->soc_host.nr = pdev->id; |
| |
| err = soc_camera_host_register(&pcdev->soc_host); |
| if (err) |
| goto exit_free_irq; |
| |
| return 0; |
| |
| exit_free_irq: |
| free_irq(pcdev->irq, pcdev); |
| exit_free_dma: |
| pxa_free_dma(pcdev->dma_chans[2]); |
| exit_free_dma_u: |
| pxa_free_dma(pcdev->dma_chans[1]); |
| exit_free_dma_y: |
| pxa_free_dma(pcdev->dma_chans[0]); |
| exit_iounmap: |
| iounmap(base); |
| exit_release: |
| release_mem_region(res->start, resource_size(res)); |
| exit_clk: |
| clk_put(pcdev->clk); |
| exit_kfree: |
| kfree(pcdev); |
| exit: |
| return err; |
| } |
| |
| static int __devexit pxa_camera_remove(struct platform_device *pdev) |
| { |
| struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); |
| struct pxa_camera_dev *pcdev = container_of(soc_host, |
| struct pxa_camera_dev, soc_host); |
| struct resource *res; |
| |
| clk_put(pcdev->clk); |
| |
| pxa_free_dma(pcdev->dma_chans[0]); |
| pxa_free_dma(pcdev->dma_chans[1]); |
| pxa_free_dma(pcdev->dma_chans[2]); |
| free_irq(pcdev->irq, pcdev); |
| |
| soc_camera_host_unregister(soc_host); |
| |
| iounmap(pcdev->base); |
| |
| res = pcdev->res; |
| release_mem_region(res->start, resource_size(res)); |
| |
| kfree(pcdev); |
| |
| dev_info(&pdev->dev, "PXA Camera driver unloaded\n"); |
| |
| return 0; |
| } |
| |
| static struct platform_driver pxa_camera_driver = { |
| .driver = { |
| .name = PXA_CAM_DRV_NAME, |
| }, |
| .probe = pxa_camera_probe, |
| .remove = __devexit_p(pxa_camera_remove), |
| }; |
| |
| |
| static int __init pxa_camera_init(void) |
| { |
| return platform_driver_register(&pxa_camera_driver); |
| } |
| |
| static void __exit pxa_camera_exit(void) |
| { |
| platform_driver_unregister(&pxa_camera_driver); |
| } |
| |
| module_init(pxa_camera_init); |
| module_exit(pxa_camera_exit); |
| |
| MODULE_DESCRIPTION("PXA27x SoC Camera Host driver"); |
| MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME); |