From 5ca11fa3e0025864df930d6d97470b87c35919ed Mon Sep 17 00:00:00 2001 From: Eric Miao Date: Thu, 18 Dec 2008 11:15:50 -0300 Subject: [PATCH] V4L/DVB: pxa-camera: use memory mapped IO access for camera (QCI) registers Signed-off-by: Eric Miao Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/pxa_camera.c | 202 +++++++++++++++++++++++++------ 1 file changed, 162 insertions(+), 40 deletions(-) diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c index 97923e1bd06..45040f99031 100644 --- a/drivers/media/video/pxa_camera.c +++ b/drivers/media/video/pxa_camera.c @@ -42,6 +42,101 @@ #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) @@ -385,7 +480,10 @@ static void pxa_videobuf_queue(struct videobuf_queue *vq, active = pcdev->active; if (!active) { - CIFR |= CIFR_RESET_F; + unsigned long cifr, cicr0; + + cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F; + __raw_writel(cifr, pcdev->base + CIFR); for (i = 0; i < pcdev->channels; i++) { DDADR(pcdev->dma_chans[i]) = buf->dmas[i].sg_dma; @@ -394,7 +492,9 @@ static void pxa_videobuf_queue(struct videobuf_queue *vq, } pcdev->active = buf; - CICR0 |= CICR0_ENB; + + cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB; + __raw_writel(cicr0, pcdev->base + CICR0); } else { struct pxa_cam_dma *buf_dma; struct pxa_cam_dma *act_dma; @@ -478,6 +578,8 @@ static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, struct videobuf_buffer *vb, struct pxa_buffer *buf) { + unsigned long cicr0; + /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ list_del_init(&vb->queue); vb->state = VIDEOBUF_DONE; @@ -490,7 +592,9 @@ static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, DCSR(pcdev->dma_chans[0]) = 0; DCSR(pcdev->dma_chans[1]) = 0; DCSR(pcdev->dma_chans[2]) = 0; - CICR0 &= ~CICR0_ENB; + + cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB; + __raw_writel(cicr0, pcdev->base + CICR0); return; } @@ -505,6 +609,7 @@ static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, unsigned long flags; u32 status, camera_status, overrun; struct videobuf_buffer *vb; + unsigned long cifr, cicr0; spin_lock_irqsave(&pcdev->lock, flags); @@ -527,22 +632,26 @@ static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, goto out; } - camera_status = CISR; + camera_status = __raw_readl(pcdev->base + 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; + cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB; + __raw_writel(cicr0, pcdev->base + CICR0); + /* Stop DMA */ DCSR(channel) = 0; /* Reset the FIFOs */ - CIFR |= CIFR_RESET_F; + cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F; + __raw_writel(cifr, pcdev->base + CIFR); /* Enable End-Of-Frame Interrupt */ - CICR0 &= ~CICR0_EOFM; + cicr0 &= ~CICR0_EOFM; + __raw_writel(cicr0, pcdev->base + CICR0); /* Restart the Capture Interface */ - CICR0 |= CICR0_ENB; + __raw_writel(cicr0 | CICR0_ENB, pcdev->base + CICR0); goto out; } @@ -629,7 +738,8 @@ static void pxa_camera_activate(struct pxa_camera_dev *pcdev) pdata->init(pcdev->dev); } - CICR0 = 0x3FF; /* disable all interrupts */ + /* disable all interrupts */ + __raw_writel(0x3ff, pcdev->base + CICR0); if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) cicr4 |= CICR4_PCLK_EN; @@ -642,7 +752,8 @@ static void pxa_camera_activate(struct pxa_camera_dev *pcdev) if (pcdev->platform_flags & PXA_CAMERA_VSP) cicr4 |= CICR4_VSP; - CICR4 = mclk_get_divisor(pcdev) | cicr4; + cicr4 |= mclk_get_divisor(pcdev); + __raw_writel(cicr4, pcdev->base + CICR4); clk_enable(pcdev->clk); } @@ -655,14 +766,15 @@ static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev) static irqreturn_t pxa_camera_irq(int irq, void *data) { struct pxa_camera_dev *pcdev = data; - unsigned int status = CISR; + unsigned long status, cicr0; - dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status); + status = __raw_readl(pcdev->base + CISR); + dev_dbg(pcdev->dev, "Camera interrupt status 0x%lx\n", status); if (!status) return IRQ_NONE; - CISR = status; + __raw_writel(status, pcdev->base + CISR); if (status & CISR_EOF) { int i; @@ -671,7 +783,8 @@ static irqreturn_t pxa_camera_irq(int irq, void *data) pcdev->active->dmas[i].sg_dma; DCSR(pcdev->dma_chans[i]) = DCSR_RUN; } - CICR0 |= CICR0_EOFM; + cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM; + __raw_writel(cicr0, pcdev->base + CICR0); } return IRQ_HANDLED; @@ -718,7 +831,7 @@ static void pxa_camera_remove_device(struct soc_camera_device *icd) icd->devnum); /* disable capture, disable interrupts */ - CICR0 = 0x3ff; + __raw_writel(0x3ff, pcdev->base + CICR0); /* Stop DMA engine */ DCSR(pcdev->dma_chans[0]) = 0; @@ -779,7 +892,7 @@ static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) 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; + u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0; int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags); if (ret < 0) @@ -852,9 +965,9 @@ static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) cicr4 |= CICR4_VSP; - cicr0 = CICR0; + cicr0 = __raw_readl(pcdev->base + CICR0); if (cicr0 & CICR0_ENB) - CICR0 = cicr0 & ~CICR0_ENB; + __raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0); cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw; @@ -884,16 +997,21 @@ static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) break; } - CICR1 = cicr1; - CICR2 = 0; - CICR3 = CICR3_LPF_VAL(icd->height - 1) | + 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; + cicr4 |= mclk_get_divisor(pcdev); + + __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 = (pcdev->platform_flags & PXA_CAMERA_MASTER ? - CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)) | - CICR0_DMAEN | CICR0_IRQ_MASK | (cicr0 & CICR0_ENB); + 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); return 0; } @@ -1139,11 +1257,11 @@ static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state) struct pxa_camera_dev *pcdev = ici->priv; int i = 0, ret = 0; - pcdev->save_cicr[i++] = CICR0; - pcdev->save_cicr[i++] = CICR1; - pcdev->save_cicr[i++] = CICR2; - pcdev->save_cicr[i++] = CICR3; - pcdev->save_cicr[i++] = CICR4; + 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); @@ -1162,23 +1280,27 @@ static int pxa_camera_resume(struct soc_camera_device *icd) DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD; DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD; - CICR0 = pcdev->save_cicr[i++] & ~CICR0_ENB; - CICR1 = pcdev->save_cicr[i++]; - CICR2 = pcdev->save_cicr[i++]; - CICR3 = pcdev->save_cicr[i++]; - CICR4 = pcdev->save_cicr[i++]; + __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) { + unsigned long cifr, cicr0; + /* Reset the FIFOs */ - CIFR |= CIFR_RESET_F; - /* Enable End-Of-Frame Interrupt */ - CICR0 &= ~CICR0_EOFM; - /* Restart the Capture Interface */ - CICR0 |= CICR0_ENB; + cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F; + __raw_writel(cifr, pcdev->base + CIFR); + + cicr0 = __raw_readl(pcdev->base + CICR0); + cicr0 &= ~CICR0_EOFM; /* Enable End-Of-Frame Interrupt */ + cicr0 |= CICR0_ENB; /* Restart the Capture Interface */ + __raw_writel(cicr0, pcdev->base + CICR0); } return ret; -- 2.41.0