diff options
Diffstat (limited to 'drivers/media/video/pxa_camera.c')
| -rw-r--r-- | drivers/media/video/pxa_camera.c | 1209 |
1 files changed, 0 insertions, 1209 deletions
diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c deleted file mode 100644 index b15f82c4976..00000000000 --- a/drivers/media/video/pxa_camera.c +++ /dev/null @@ -1,1209 +0,0 @@ -/* - * 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/mutex.h> -#include <linux/clk.h> - -#include <media/v4l2-common.h> -#include <media/v4l2-dev.h> -#include <media/videobuf-dma-sg.h> -#include <media/soc_camera.h> - -#include <linux/videodev2.h> - -#include <asm/dma.h> -#include <asm/arch/pxa-regs.h> -#include <asm/arch/camera.h> - -#define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5) -#define PXA_CAM_DRV_NAME "pxa27x-camera" - -#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) - -static DEFINE_MUTEX(camera_lock); - -/* - * 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; - - const struct soc_camera_data_format *fmt; - - /* 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 device *dev; - /* 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 platform_mclk_10khz; - - struct list_head capture; - - spinlock_t lock; - - struct pxa_buffer *active; - struct pxa_dma_desc *sg_tail[3]; -}; - -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; - struct soc_camera_host *ici = - to_soc_camera_host(icd->dev.parent); - struct pxa_camera_dev *pcdev = ici->priv; - - dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); - - /* planar capture requires Y, U and V buffers to be page aligned */ - if (pcdev->channels == 3) { - *size = PAGE_ALIGN(icd->width * icd->height); /* Y pages */ - *size += PAGE_ALIGN(icd->width * icd->height / 2); /* U pages */ - *size += PAGE_ALIGN(icd->width * icd->height / 2); /* V pages */ - } else { - *size = icd->width * icd->height * - ((icd->current_fmt->depth + 7) >> 3); - } - - if (0 == *count) - *count = 32; - while (*size * *count > vid_limit * 1024 * 1024) - (*count)--; - - 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 pxa_camera_dev *pcdev = ici->priv; - struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); - int i; - - BUG_ON(in_interrupt()); - - dev_dbg(&icd->dev, "%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(&buf->vb, 0, 0); - videobuf_dma_unmap(vq, dma); - videobuf_dma_free(dma); - - for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) { - if (buf->dmas[i].sg_cpu) - dma_free_coherent(pcdev->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 pxa_init_dma_channel(struct pxa_camera_dev *pcdev, - struct pxa_buffer *buf, - struct videobuf_dmabuf *dma, int channel, - int sglen, int sg_start, int cibr, - unsigned int size) -{ - struct pxa_cam_dma *pxa_dma = &buf->dmas[channel]; - int i; - - if (pxa_dma->sg_cpu) - dma_free_coherent(pcdev->dev, pxa_dma->sg_size, - pxa_dma->sg_cpu, pxa_dma->sg_dma); - - pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc); - pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->dev, pxa_dma->sg_size, - &pxa_dma->sg_dma, GFP_KERNEL); - if (!pxa_dma->sg_cpu) - return -ENOMEM; - - pxa_dma->sglen = sglen; - - for (i = 0; i < sglen; i++) { - int sg_i = sg_start + i; - struct scatterlist *sg = dma->sglist; - unsigned int dma_len = sg_dma_len(&sg[sg_i]), xfer_len; - - pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr; - pxa_dma->sg_cpu[i].dtadr = sg_dma_address(&sg[sg_i]); - - /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ - xfer_len = (min(dma_len, size) + 7) & ~7; - - pxa_dma->sg_cpu[i].dcmd = - DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len; - size -= dma_len; - pxa_dma->sg_cpu[i].ddadr = - pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc); - } - - pxa_dma->sg_cpu[sglen - 1].ddadr = DDADR_STOP; - pxa_dma->sg_cpu[sglen - 1].dcmd |= DCMD_ENDIRQEN; - - return 0; -} - -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 pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); - int ret; - int sglen_y, sglen_yu = 0, sglen_u = 0, sglen_v = 0; - int size_y, size_u = 0, size_v = 0; - - dev_dbg(&icd->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->fmt != icd->current_fmt || - vb->width != icd->width || - vb->height != icd->height || - vb->field != field) { - buf->fmt = icd->current_fmt; - vb->width = icd->width; - vb->height = icd->height; - vb->field = field; - vb->state = VIDEOBUF_NEEDS_INIT; - } - - vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); - if (0 != vb->baddr && vb->bsize < vb->size) { - ret = -EINVAL; - goto out; - } - - if (vb->state == VIDEOBUF_NEEDS_INIT) { - unsigned int size = vb->size; - struct videobuf_dmabuf *dma = videobuf_to_dma(vb); - - ret = videobuf_iolock(vq, vb, NULL); - if (ret) - goto fail; - - if (pcdev->channels == 3) { - /* FIXME the calculations should be more precise */ - sglen_y = dma->sglen / 2; - sglen_u = sglen_v = dma->sglen / 4 + 1; - sglen_yu = sglen_y + sglen_u; - size_y = size / 2; - size_u = size_v = size / 4; - } else { - sglen_y = dma->sglen; - size_y = size; - } - - /* init DMA for Y channel */ - ret = pxa_init_dma_channel(pcdev, buf, dma, 0, sglen_y, - 0, 0x28, size_y); - - if (ret) { - dev_err(pcdev->dev, - "DMA initialization for Y/RGB failed\n"); - goto fail; - } - - if (pcdev->channels == 3) { - /* init DMA for U channel */ - ret = pxa_init_dma_channel(pcdev, buf, dma, 1, sglen_u, - sglen_y, 0x30, size_u); - if (ret) { - dev_err(pcdev->dev, - "DMA initialization for U failed\n"); - goto fail_u; - } - - /* init DMA for V channel */ - ret = pxa_init_dma_channel(pcdev, buf, dma, 2, sglen_v, - sglen_yu, 0x38, size_v); - if (ret) { - dev_err(pcdev->dev, - "DMA initialization for V failed\n"); - goto fail_v; - } - } - - vb->state = VIDEOBUF_PREPARED; - } - - buf->inwork = 0; - buf->active_dma = DMA_Y; - if (pcdev->channels == 3) - buf->active_dma |= DMA_U | DMA_V; - - return 0; - -fail_v: - dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size, - buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma); -fail_u: - dma_free_coherent(pcdev->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; -} - -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); - struct pxa_buffer *active; - unsigned long flags; - int i; - - dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, - vb, vb->baddr, vb->bsize); - spin_lock_irqsave(&pcdev->lock, flags); - - list_add_tail(&vb->queue, &pcdev->capture); - - vb->state = VIDEOBUF_ACTIVE; - active = pcdev->active; - - if (!active) { - CIFR |= CIFR_RESET_F; - - for (i = 0; i < pcdev->channels; i++) { - DDADR(pcdev->dma_chans[i]) = buf->dmas[i].sg_dma; - DCSR(pcdev->dma_chans[i]) = DCSR_RUN; - pcdev->sg_tail[i] = buf->dmas[i].sg_cpu + buf->dmas[i].sglen - 1; - } - - pcdev->active = buf; - CICR0 |= CICR0_ENB; - } else { - struct pxa_cam_dma *buf_dma; - struct pxa_cam_dma *act_dma; - int nents; - - for (i = 0; i < pcdev->channels; i++) { - buf_dma = &buf->dmas[i]; - act_dma = &active->dmas[i]; - nents = buf_dma->sglen; - - /* Stop DMA engine */ - DCSR(pcdev->dma_chans[i]) = 0; - - /* Add the descriptors we just initialized to - the currently running chain */ - pcdev->sg_tail[i]->ddadr = buf_dma->sg_dma; - pcdev->sg_tail[i] = buf_dma->sg_cpu + buf_dma->sglen - 1; - - /* Setup a dummy descriptor with the DMA engines current - * state - */ - buf_dma->sg_cpu[nents].dsadr = - pcdev->res->start + 0x28 + i*8; /* CIBRx */ - buf_dma->sg_cpu[nents].dtadr = - DTADR(pcdev->dma_chans[i]); - buf_dma->sg_cpu[nents].dcmd = - DCMD(pcdev->dma_chans[i]); - - if (DDADR(pcdev->dma_chans[i]) == DDADR_STOP) { - /* The DMA engine is on the last - descriptor, set the next descriptors - address to the descriptors we just - initialized */ - buf_dma->sg_cpu[nents].ddadr = buf_dma->sg_dma; - } else { - buf_dma->sg_cpu[nents].ddadr = - DDADR(pcdev->dma_chans[i]); - } - - /* The next descriptor is the dummy descriptor */ - DDADR(pcdev->dma_chans[i]) = buf_dma->sg_dma + nents * - sizeof(struct pxa_dma_desc); - - DCSR(pcdev->dma_chans[i]) = DCSR_RUN; - } - } - - spin_unlock_irqrestore(&pcdev->lock, flags); -} - -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; - - dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, - vb, vb->baddr, vb->bsize); - - switch (vb->state) { - case VIDEOBUF_ACTIVE: - dev_dbg(&icd->dev, "%s (active)\n", __func__); - break; - case VIDEOBUF_QUEUED: - dev_dbg(&icd->dev, "%s (queued)\n", __func__); - break; - case VIDEOBUF_PREPARED: - dev_dbg(&icd->dev, "%s (prepared)\n", __func__); - break; - default: - dev_dbg(&icd->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) -{ - /* _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); - - if (list_empty(&pcdev->capture)) { - pcdev->active = NULL; - DCSR(pcdev->dma_chans[0]) = 0; - DCSR(pcdev->dma_chans[1]) = 0; - DCSR(pcdev->dma_chans[2]) = 0; - CICR0 &= ~CICR0_ENB; - return; - } - - pcdev->active = list_entry(pcdev->capture.next, - struct pxa_buffer, vb.queue); -} - -static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, - enum pxa_camera_active_dma act_dma) -{ - 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 | DCSR_ENDINTR; - - if (status & DCSR_BUSERR) { - dev_err(pcdev->dev, "DMA Bus Error IRQ!\n"); - goto out; - } - - if (!(status & DCSR_ENDINTR)) { - dev_err(pcdev->dev, "Unknown DMA IRQ source, " - "status: 0x%08x\n", status); - goto out; - } - - if (!pcdev->active) { - dev_err(pcdev->dev, "DMA End IRQ with no active buffer!\n"); - goto out; - } - - camera_status = CISR; - overrun = CISR_IFO_0; - if (pcdev->channels == 3) - overrun |= CISR_IFO_1 | CISR_IFO_2; - if (camera_status & overrun) { - dev_dbg(pcdev->dev, "FIFO overrun! CISR: %x\n", camera_status); - /* Stop the Capture Interface */ - CICR0 &= ~CICR0_ENB; - /* Stop DMA */ - DCSR(channel) = 0; - /* Reset the FIFOs */ - CIFR |= CIFR_RESET_F; - /* Enable End-Of-Frame Interrupt */ - CICR0 &= ~CICR0_EOFM; - /* Restart the Capture Interface */ - CICR0 |= CICR0_ENB; - goto out; - } - - vb = &pcdev->active->vb; - buf = container_of(vb, struct pxa_buffer, vb); - WARN_ON(buf->inwork || list_empty(&vb->queue)); - dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, - vb, vb->baddr, vb->bsize); - - buf->active_dma &= ~act_dma; - if (!buf->active_dma) - pxa_camera_wakeup(pcdev, vb, buf); - -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 int mclk_get_divisor(struct pxa_camera_dev *pcdev) -{ - unsigned int mclk_10khz = pcdev->platform_mclk_10khz; - unsigned long div; - unsigned long lcdclk; - - lcdclk = clk_get_rate(pcdev->clk) / 10000; - - /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here - * they get a nice Oops */ - div = (lcdclk + 2 * mclk_10khz - 1) / (2 * mclk_10khz) - 1; - - dev_dbg(pcdev->dev, "LCD clock %lukHz, target freq %dkHz, " - "divisor %lu\n", lcdclk * 10, mclk_10khz * 10, div); - - return div; -} - -static void pxa_camera_activate(struct pxa_camera_dev *pcdev) -{ - struct pxacamera_platform_data *pdata = pcdev->pdata; - u32 cicr4 = 0; - - dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n", - pcdev, pdata); - - if (pdata && pdata->init) { - dev_dbg(pcdev->dev, "%s: Init gpios\n", __func__); - pdata->init(pcdev->dev); - } - - if (pdata && pdata->power) { - dev_dbg(pcdev->dev, "%s: Power on camera\n", __func__); - pdata->power(pcdev->dev, 1); - } - - if (pdata && pdata->reset) { - dev_dbg(pcdev->dev, "%s: Releasing camera reset\n", - __func__); - pdata->reset(pcdev->dev, 1); - } - - CICR0 = 0x3FF; /* disable all interrupts */ - - 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; - - CICR4 = mclk_get_divisor(pcdev) | cicr4; - - clk_enable(pcdev->clk); -} - -static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev) -{ - struct pxacamera_platform_data *board = pcdev->pdata; - - clk_disable(pcdev->clk); - - if (board && board->reset) { - dev_dbg(pcdev->dev, "%s: Asserting camera reset\n", - __func__); - board->reset(pcdev->dev, 0); - } - - if (board && board->power) { - dev_dbg(pcdev->dev, "%s: Power off camera\n", __func__); - board->power(pcdev->dev, 0); - } -} - -static irqreturn_t pxa_camera_irq(int irq, void *data) -{ - struct pxa_camera_dev *pcdev = data; - unsigned int status = CISR; - - dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status); - - if (!status) - return IRQ_NONE; - - CISR = status; - - if (status & CISR_EOF) { - int i; - for (i = 0; i < pcdev->channels; i++) { - DDADR(pcdev->dma_chans[i]) = - pcdev->active->dmas[i].sg_dma; - DCSR(pcdev->dma_chans[i]) = DCSR_RUN; - } - CICR0 |= CICR0_EOFM; - } - - return IRQ_HANDLED; -} - -/* The following two functions absolutely depend on the fact, that - * there can be only one camera on PXA quick capture interface */ -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; - int ret; - - mutex_lock(&camera_lock); - - if (pcdev->icd) { - ret = -EBUSY; - goto ebusy; - } - - dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n", - icd->devnum); - - pxa_camera_activate(pcdev); - ret = icd->ops->init(icd); - - if (!ret) - pcdev->icd = icd; - -ebusy: - mutex_unlock(&camera_lock); - - return ret; -} - -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, "PXA Camera driver detached from camera %d\n", - icd->devnum); - - /* disable capture, disable interrupts */ - CICR0 = 0x3ff; - - /* Stop DMA engine */ - DCSR(pcdev->dma_chans[0]) = 0; - DCSR(pcdev->dma_chans[1]) = 0; - DCSR(pcdev->dma_chans[2]) = 0; - - icd->ops->release(icd); - - 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_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; - } - - return 0; -} - -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 dw, bpp, bus_flags, camera_flags, common_flags; - u32 cicr0, cicr1, cicr4 = 0; - int ret = test_platform_param(pcdev, icd->buswidth, &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; - } - - ret = icd->ops->set_bus_param(icd, common_flags); - if (ret < 0) - return ret; - - /* Datawidth is now guaranteed to be equal to one of the three values. - * We fix bit-per-pixel equal to data-width... */ - switch (common_flags & SOCAM_DATAWIDTH_MASK) { - case SOCAM_DATAWIDTH_10: - icd->buswidth = 10; - dw = 4; - bpp = 0x40; - break; - case SOCAM_DATAWIDTH_9: - icd->buswidth = 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: - icd->buswidth = 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 (common_flags & SOCAM_PCLK_SAMPLE_FALLING) - cicr4 |= CICR4_PCP; - if (common_flags & SOCAM_HSYNC_ACTIVE_LOW) - cicr4 |= CICR4_HSP; - if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) - cicr4 |= CICR4_VSP; - - cicr0 = CICR0; - if (cicr0 & CICR0_ENB) - CICR0 = cicr0 & ~CICR0_ENB; - - cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw; - - switch (pixfmt) { - case V4L2_PIX_FMT_YUV422P: - pcdev->channels = 3; - cicr1 |= CICR1_YCBCR_F; - case V4L2_PIX_FMT_YUYV: - 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; - } - - CICR1 = cicr1; - CICR2 = 0; - CICR3 = CICR3_LPF_VAL(icd->height - 1) | - CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top)); - CICR4 = mclk_get_divisor(pcdev) | cicr4; - - /* CIF interrupts are not used, only DMA */ - CICR0 = (pcdev->platform_flags & PXA_CAMERA_MASTER ? - CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)) | - CICR0_DMAEN | CICR0_IRQ_MASK | (cicr0 & CICR0_ENB); - - return 0; -} - -static int pxa_camera_try_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; - int ret = test_platform_param(pcdev, icd->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 int pxa_camera_set_fmt_cap(struct soc_camera_device *icd, - __u32 pixfmt, struct v4l2_rect *rect) -{ - return icd->ops->set_fmt_cap(icd, pixfmt, rect); -} - -static int pxa_camera_try_fmt_cap(struct soc_camera_device *icd, - struct v4l2_format *f) -{ - /* limit to pxa hardware capabilities */ - if (f->fmt.pix.height < 32) - f->fmt.pix.height = 32; - if (f->fmt.pix.height > 2048) - f->fmt.pix.height = 2048; - if (f->fmt.pix.width < 48) - f->fmt.pix.width = 48; - if (f->fmt.pix.width > 2048) - f->fmt.pix.width = 2048; - f->fmt.pix.width &= ~0x01; - - /* limit to sensor capabilities */ - return icd->ops->try_fmt_cap(icd, f); -} - -static int pxa_camera_reqbufs(struct soc_camera_file *icf, - 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(icf->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_file *icf = file->private_data; - struct pxa_buffer *buf; - - buf = list_entry(icf->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 struct soc_camera_host_ops pxa_soc_camera_host_ops = { - .owner = THIS_MODULE, - .add = pxa_camera_add_device, - .remove = pxa_camera_remove_device, - .set_fmt_cap = pxa_camera_set_fmt_cap, - .try_fmt_cap = pxa_camera_try_fmt_cap, - .init_videobuf = pxa_camera_init_videobuf, - .reqbufs = pxa_camera_reqbufs, - .poll = pxa_camera_poll, - .querycap = pxa_camera_querycap, - .try_bus_param = pxa_camera_try_bus_param, - .set_bus_param = pxa_camera_set_bus_param, -}; - -/* Should be allocated dynamically too, but we have only one. */ -static struct soc_camera_host pxa_soc_camera_host = { - .drv_name = PXA_CAM_DRV_NAME, - .ops = &pxa_soc_camera_host_ops, -}; - -static int 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, "CAMCLK"); - if (IS_ERR(pcdev->clk)) { - err = PTR_ERR(pcdev->clk); - goto exit_kfree; - } - - dev_set_drvdata(&pdev->dev, pcdev); - 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->platform_mclk_10khz = pcdev->pdata->mclk_10khz; - if (!pcdev->platform_mclk_10khz) { - dev_warn(&pdev->dev, - "mclk_10khz == 0! Please, fix your platform data. " - "Using default 20MHz\n"); - pcdev->platform_mclk_10khz = 2000; - } - - INIT_LIST_HEAD(&pcdev->capture); - spin_lock_init(&pcdev->lock); - - /* - * Request the regions. - */ - if (!request_mem_region(res->start, res->end - res->start + 1, - PXA_CAM_DRV_NAME)) { - err = -EBUSY; - goto exit_clk; - } - - base = ioremap(res->start, res->end - res->start + 1); - if (!base) { - err = -ENOMEM; - goto exit_release; - } - pcdev->irq = irq; - pcdev->base = base; - pcdev->dev = &pdev->dev; - - /* request dma */ - pcdev->dma_chans[0] = pxa_request_dma("CI_Y", DMA_PRIO_HIGH, - pxa_camera_dma_irq_y, pcdev); - if (pcdev->dma_chans[0] < 0) { - dev_err(pcdev->dev, "Can't request DMA for Y\n"); - err = -ENOMEM; - goto exit_iounmap; - } - dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]); - - pcdev->dma_chans[1] = pxa_request_dma("CI_U", DMA_PRIO_HIGH, - pxa_camera_dma_irq_u, pcdev); - if (pcdev->dma_chans[1] < 0) { - dev_err(pcdev->dev, "Can't request DMA for U\n"); - err = -ENOMEM; - goto exit_free_dma_y; - } - dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]); - - pcdev->dma_chans[2] = pxa_request_dma("CI_V", DMA_PRIO_HIGH, - pxa_camera_dma_irq_v, pcdev); - if (pcdev->dma_chans[0] < 0) { - dev_err(pcdev->dev, "Can't request DMA for V\n"); - err = -ENOMEM; - goto exit_free_dma_u; - } - dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]); - - DRCMR68 = pcdev->dma_chans[0] | DRCMR_MAPVLD; - DRCMR69 = pcdev->dma_chans[1] | DRCMR_MAPVLD; - DRCMR70 = 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(pcdev->dev, "Camera interrupt register failed \n"); - goto exit_free_dma; - } - - pxa_soc_camera_host.priv = pcdev; - pxa_soc_camera_host.dev.parent = &pdev->dev; - pxa_soc_camera_host.nr = pdev->id; - err = soc_camera_host_register(&pxa_soc_camera_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, res->end - res->start + 1); -exit_clk: - clk_put(pcdev->clk); -exit_kfree: - kfree(pcdev); -exit: - return err; -} - -static int __devexit pxa_camera_remove(struct platform_device *pdev) -{ - struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev); - 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(&pxa_soc_camera_host); - - iounmap(pcdev->base); - - res = pcdev->res; - release_mem_region(res->start, res->end - res->start + 1); - - 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 = __exit_p(pxa_camera_remove), -}; - - -static int __devinit pxa_camera_init(void) -{ - return platform_driver_register(&pxa_camera_driver); -} - -static void __exit pxa_camera_exit(void) -{ - return 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"); |