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1273 lines
32 KiB
1273 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* This is the driver for the STA2x11 Video Input Port. |
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* |
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* Copyright (C) 2012 ST Microelectronics |
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* author: Federico Vaga <[email protected]> |
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* Copyright (C) 2010 WindRiver Systems, Inc. |
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* authors: Andreas Kies <[email protected]> |
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* Vlad Lungu <[email protected]> |
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*/ |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/videodev2.h> |
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#include <linux/kmod.h> |
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#include <linux/pci.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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#include <linux/gpio.h> |
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#include <linux/i2c.h> |
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#include <linux/delay.h> |
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#include <media/v4l2-common.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/v4l2-fh.h> |
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#include <media/v4l2-event.h> |
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#include <media/videobuf2-dma-contig.h> |
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#include "sta2x11_vip.h" |
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#define DRV_VERSION "1.3" |
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#ifndef PCI_DEVICE_ID_STMICRO_VIP |
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#define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D |
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#endif |
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#define MAX_FRAMES 4 |
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/*Register offsets*/ |
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#define DVP_CTL 0x00 |
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#define DVP_TFO 0x04 |
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#define DVP_TFS 0x08 |
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#define DVP_BFO 0x0C |
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#define DVP_BFS 0x10 |
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#define DVP_VTP 0x14 |
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#define DVP_VBP 0x18 |
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#define DVP_VMP 0x1C |
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#define DVP_ITM 0x98 |
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#define DVP_ITS 0x9C |
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#define DVP_STA 0xA0 |
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#define DVP_HLFLN 0xA8 |
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#define DVP_RGB 0xC0 |
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#define DVP_PKZ 0xF0 |
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/*Register fields*/ |
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#define DVP_CTL_ENA 0x00000001 |
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#define DVP_CTL_RST 0x80000000 |
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#define DVP_CTL_DIS (~0x00040001) |
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#define DVP_IT_VSB 0x00000008 |
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#define DVP_IT_VST 0x00000010 |
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#define DVP_IT_FIFO 0x00000020 |
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#define DVP_HLFLN_SD 0x00000001 |
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#define SAVE_COUNT 8 |
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#define AUX_COUNT 3 |
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#define IRQ_COUNT 1 |
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struct vip_buffer { |
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struct vb2_v4l2_buffer vb; |
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struct list_head list; |
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dma_addr_t dma; |
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}; |
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static inline struct vip_buffer *to_vip_buffer(struct vb2_v4l2_buffer *vb2) |
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{ |
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return container_of(vb2, struct vip_buffer, vb); |
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} |
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/** |
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* struct sta2x11_vip - All internal data for one instance of device |
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* @v4l2_dev: device registered in v4l layer |
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* @video_dev: properties of our device |
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* @pdev: PCI device |
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* @adapter: contains I2C adapter information |
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* @register_save_area: All relevant register are saved here during suspend |
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* @decoder: contains information about video DAC |
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* @ctrl_hdl: handler for control framework |
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* @format: pixel format, fixed UYVY |
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* @std: video standard (e.g. PAL/NTSC) |
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* @input: input line for video signal ( 0 or 1 ) |
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* @disabled: Device is in power down state |
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* @slock: for excluse access of registers |
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* @vb_vidq: queue maintained by videobuf2 layer |
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* @buffer_list: list of buffer in use |
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* @sequence: sequence number of acquired buffer |
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* @active: current active buffer |
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* @lock: used in videobuf2 callback |
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* @v4l_lock: serialize its video4linux ioctls |
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* @tcount: Number of top frames |
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* @bcount: Number of bottom frames |
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* @overflow: Number of FIFO overflows |
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* @iomem: hardware base address |
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* @config: I2C and gpio config from platform |
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* |
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* All non-local data is accessed via this structure. |
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*/ |
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struct sta2x11_vip { |
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struct v4l2_device v4l2_dev; |
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struct video_device video_dev; |
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struct pci_dev *pdev; |
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struct i2c_adapter *adapter; |
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unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT]; |
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struct v4l2_subdev *decoder; |
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struct v4l2_ctrl_handler ctrl_hdl; |
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struct v4l2_pix_format format; |
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v4l2_std_id std; |
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unsigned int input; |
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int disabled; |
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spinlock_t slock; |
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struct vb2_queue vb_vidq; |
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struct list_head buffer_list; |
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unsigned int sequence; |
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struct vip_buffer *active; /* current active buffer */ |
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spinlock_t lock; /* Used in videobuf2 callback */ |
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struct mutex v4l_lock; |
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/* Interrupt counters */ |
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int tcount, bcount; |
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int overflow; |
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void __iomem *iomem; /* I/O Memory */ |
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struct vip_config *config; |
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}; |
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static const unsigned int registers_to_save[AUX_COUNT] = { |
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DVP_HLFLN, DVP_RGB, DVP_PKZ |
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}; |
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static struct v4l2_pix_format formats_50[] = { |
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{ /*PAL interlaced */ |
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.width = 720, |
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.height = 576, |
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.pixelformat = V4L2_PIX_FMT_UYVY, |
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.field = V4L2_FIELD_INTERLACED, |
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.bytesperline = 720 * 2, |
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.sizeimage = 720 * 2 * 576, |
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.colorspace = V4L2_COLORSPACE_SMPTE170M}, |
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{ /*PAL top */ |
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.width = 720, |
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.height = 288, |
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.pixelformat = V4L2_PIX_FMT_UYVY, |
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.field = V4L2_FIELD_TOP, |
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.bytesperline = 720 * 2, |
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.sizeimage = 720 * 2 * 288, |
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.colorspace = V4L2_COLORSPACE_SMPTE170M}, |
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{ /*PAL bottom */ |
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.width = 720, |
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.height = 288, |
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.pixelformat = V4L2_PIX_FMT_UYVY, |
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.field = V4L2_FIELD_BOTTOM, |
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.bytesperline = 720 * 2, |
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.sizeimage = 720 * 2 * 288, |
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.colorspace = V4L2_COLORSPACE_SMPTE170M}, |
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}; |
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static struct v4l2_pix_format formats_60[] = { |
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{ /*NTSC interlaced */ |
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.width = 720, |
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.height = 480, |
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.pixelformat = V4L2_PIX_FMT_UYVY, |
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.field = V4L2_FIELD_INTERLACED, |
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.bytesperline = 720 * 2, |
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.sizeimage = 720 * 2 * 480, |
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.colorspace = V4L2_COLORSPACE_SMPTE170M}, |
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{ /*NTSC top */ |
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.width = 720, |
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.height = 240, |
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.pixelformat = V4L2_PIX_FMT_UYVY, |
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.field = V4L2_FIELD_TOP, |
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.bytesperline = 720 * 2, |
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.sizeimage = 720 * 2 * 240, |
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.colorspace = V4L2_COLORSPACE_SMPTE170M}, |
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{ /*NTSC bottom */ |
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.width = 720, |
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.height = 240, |
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.pixelformat = V4L2_PIX_FMT_UYVY, |
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.field = V4L2_FIELD_BOTTOM, |
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.bytesperline = 720 * 2, |
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.sizeimage = 720 * 2 * 240, |
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.colorspace = V4L2_COLORSPACE_SMPTE170M}, |
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}; |
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/* Write VIP register */ |
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static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val) |
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{ |
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iowrite32((val), (vip->iomem)+(reg)); |
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} |
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/* Read VIP register */ |
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static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg) |
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{ |
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return ioread32((vip->iomem)+(reg)); |
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} |
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/* Start DMA acquisition */ |
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static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf) |
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{ |
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unsigned long offset = 0; |
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if (vip->format.field == V4L2_FIELD_INTERLACED) |
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offset = vip->format.width * 2; |
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spin_lock_irq(&vip->slock); |
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/* Enable acquisition */ |
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reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA); |
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/* Set Top and Bottom Field memory address */ |
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reg_write(vip, DVP_VTP, (u32)vip_buf->dma); |
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reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset); |
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spin_unlock_irq(&vip->slock); |
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} |
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/* Fetch the next buffer to activate */ |
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static void vip_active_buf_next(struct sta2x11_vip *vip) |
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{ |
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/* Get the next buffer */ |
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spin_lock(&vip->lock); |
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if (list_empty(&vip->buffer_list)) {/* No available buffer */ |
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spin_unlock(&vip->lock); |
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return; |
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} |
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vip->active = list_first_entry(&vip->buffer_list, |
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struct vip_buffer, |
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list); |
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/* Reset Top and Bottom counter */ |
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vip->tcount = 0; |
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vip->bcount = 0; |
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spin_unlock(&vip->lock); |
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if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */ |
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start_dma(vip, vip->active); /* start dma capture */ |
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} |
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} |
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/* Videobuf2 Operations */ |
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static int queue_setup(struct vb2_queue *vq, |
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unsigned int *nbuffers, unsigned int *nplanes, |
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unsigned int sizes[], struct device *alloc_devs[]) |
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{ |
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struct sta2x11_vip *vip = vb2_get_drv_priv(vq); |
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if (!(*nbuffers) || *nbuffers < MAX_FRAMES) |
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*nbuffers = MAX_FRAMES; |
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*nplanes = 1; |
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sizes[0] = vip->format.sizeimage; |
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vip->sequence = 0; |
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vip->active = NULL; |
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vip->tcount = 0; |
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vip->bcount = 0; |
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return 0; |
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}; |
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static int buffer_init(struct vb2_buffer *vb) |
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{ |
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
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struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
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vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0); |
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INIT_LIST_HEAD(&vip_buf->list); |
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return 0; |
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} |
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static int buffer_prepare(struct vb2_buffer *vb) |
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{ |
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
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struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); |
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struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
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unsigned long size; |
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size = vip->format.sizeimage; |
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if (vb2_plane_size(vb, 0) < size) { |
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v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n", |
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vb2_plane_size(vb, 0), size); |
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return -EINVAL; |
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} |
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vb2_set_plane_payload(&vip_buf->vb.vb2_buf, 0, size); |
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return 0; |
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} |
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static void buffer_queue(struct vb2_buffer *vb) |
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{ |
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
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struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); |
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struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
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spin_lock(&vip->lock); |
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list_add_tail(&vip_buf->list, &vip->buffer_list); |
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if (!vip->active) { /* No active buffer, active the first one */ |
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vip->active = list_first_entry(&vip->buffer_list, |
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struct vip_buffer, |
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list); |
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if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */ |
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start_dma(vip, vip_buf); /* start dma capture */ |
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} |
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spin_unlock(&vip->lock); |
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} |
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static void buffer_finish(struct vb2_buffer *vb) |
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{ |
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
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struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue); |
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struct vip_buffer *vip_buf = to_vip_buffer(vbuf); |
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/* Buffer handled, remove it from the list */ |
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spin_lock(&vip->lock); |
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list_del_init(&vip_buf->list); |
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spin_unlock(&vip->lock); |
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if (vb2_is_streaming(vb->vb2_queue)) |
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vip_active_buf_next(vip); |
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} |
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static int start_streaming(struct vb2_queue *vq, unsigned int count) |
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{ |
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struct sta2x11_vip *vip = vb2_get_drv_priv(vq); |
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spin_lock_irq(&vip->slock); |
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/* Enable interrupt VSYNC Top and Bottom*/ |
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reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST); |
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spin_unlock_irq(&vip->slock); |
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if (count) |
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start_dma(vip, vip->active); |
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return 0; |
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} |
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/* abort streaming and wait for last buffer */ |
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static void stop_streaming(struct vb2_queue *vq) |
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{ |
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struct sta2x11_vip *vip = vb2_get_drv_priv(vq); |
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struct vip_buffer *vip_buf, *node; |
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/* Disable acquisition */ |
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reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); |
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/* Disable all interrupts */ |
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reg_write(vip, DVP_ITM, 0); |
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/* Release all active buffers */ |
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spin_lock(&vip->lock); |
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list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) { |
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vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
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list_del(&vip_buf->list); |
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} |
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spin_unlock(&vip->lock); |
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} |
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static const struct vb2_ops vip_video_qops = { |
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.queue_setup = queue_setup, |
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.buf_init = buffer_init, |
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.buf_prepare = buffer_prepare, |
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.buf_finish = buffer_finish, |
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.buf_queue = buffer_queue, |
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.start_streaming = start_streaming, |
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.stop_streaming = stop_streaming, |
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.wait_prepare = vb2_ops_wait_prepare, |
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.wait_finish = vb2_ops_wait_finish, |
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}; |
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/* File Operations */ |
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static const struct v4l2_file_operations vip_fops = { |
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.owner = THIS_MODULE, |
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.open = v4l2_fh_open, |
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.release = vb2_fop_release, |
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.unlocked_ioctl = video_ioctl2, |
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.read = vb2_fop_read, |
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.mmap = vb2_fop_mmap, |
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.poll = vb2_fop_poll |
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}; |
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/** |
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* vidioc_querycap - return capabilities of device |
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* @file: descriptor of device |
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* @cap: contains return values |
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* @priv: unused |
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* |
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* the capabilities of the device are returned |
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* |
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* return value: 0, no error. |
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*/ |
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static int vidioc_querycap(struct file *file, void *priv, |
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struct v4l2_capability *cap) |
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{ |
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struct sta2x11_vip *vip = video_drvdata(file); |
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strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); |
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strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card)); |
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snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", |
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pci_name(vip->pdev)); |
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return 0; |
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} |
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/** |
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* vidioc_s_std - set video standard |
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* @file: descriptor of device |
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* @std: contains standard to be set |
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* @priv: unused |
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* |
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* the video standard is set |
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* |
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* return value: 0, no error. |
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* |
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* -EIO, no input signal detected |
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* |
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* other, returned from video DAC. |
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*/ |
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static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std) |
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{ |
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struct sta2x11_vip *vip = video_drvdata(file); |
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/* |
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* This is here for backwards compatibility only. |
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* The use of V4L2_STD_ALL to trigger a querystd is non-standard. |
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*/ |
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if (std == V4L2_STD_ALL) { |
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v4l2_subdev_call(vip->decoder, video, querystd, &std); |
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if (std == V4L2_STD_UNKNOWN) |
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return -EIO; |
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} |
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if (vip->std != std) { |
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vip->std = std; |
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if (V4L2_STD_525_60 & std) |
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vip->format = formats_60[0]; |
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else |
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vip->format = formats_50[0]; |
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} |
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return v4l2_subdev_call(vip->decoder, video, s_std, std); |
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} |
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/** |
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* vidioc_g_std - get video standard |
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* @file: descriptor of device |
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* @priv: unused |
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* @std: contains return values |
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* |
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* the current video standard is returned |
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* |
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* return value: 0, no error. |
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*/ |
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static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std) |
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{ |
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struct sta2x11_vip *vip = video_drvdata(file); |
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*std = vip->std; |
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return 0; |
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} |
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/** |
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* vidioc_querystd - get possible video standards |
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* @file: descriptor of device |
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* @priv: unused |
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* @std: contains return values |
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* |
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* all possible video standards are returned |
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* |
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* return value: delivered by video DAC routine. |
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*/ |
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static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std) |
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{ |
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struct sta2x11_vip *vip = video_drvdata(file); |
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return v4l2_subdev_call(vip->decoder, video, querystd, std); |
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} |
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static int vidioc_enum_input(struct file *file, void *priv, |
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struct v4l2_input *inp) |
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{ |
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if (inp->index > 1) |
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return -EINVAL; |
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inp->type = V4L2_INPUT_TYPE_CAMERA; |
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inp->std = V4L2_STD_ALL; |
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sprintf(inp->name, "Camera %u", inp->index); |
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return 0; |
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} |
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/** |
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* vidioc_s_input - set input line |
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* @file: descriptor of device |
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* @priv: unused |
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* @i: new input line number |
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* |
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* the current active input line is set |
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* |
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* return value: 0, no error. |
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* |
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* -EINVAL, line number out of range |
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*/ |
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static int vidioc_s_input(struct file *file, void *priv, unsigned int i) |
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{ |
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struct sta2x11_vip *vip = video_drvdata(file); |
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int ret; |
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if (i > 1) |
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return -EINVAL; |
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ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0); |
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if (!ret) |
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vip->input = i; |
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return 0; |
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} |
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/** |
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* vidioc_g_input - return input line |
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* @file: descriptor of device |
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* @priv: unused |
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* @i: returned input line number |
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* |
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* the current active input line is returned |
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* |
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* return value: always 0. |
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*/ |
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static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
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{ |
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struct sta2x11_vip *vip = video_drvdata(file); |
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|
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*i = vip->input; |
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return 0; |
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} |
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|
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/** |
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* vidioc_enum_fmt_vid_cap - return video capture format |
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* @file: descriptor of device |
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* @priv: unused |
|
* @f: returned format information |
|
* |
|
* returns name and format of video capture |
|
* Only UYVY is supported by hardware. |
|
* |
|
* return value: always 0. |
|
*/ |
|
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
|
struct v4l2_fmtdesc *f) |
|
{ |
|
|
|
if (f->index != 0) |
|
return -EINVAL; |
|
|
|
f->pixelformat = V4L2_PIX_FMT_UYVY; |
|
return 0; |
|
} |
|
|
|
/** |
|
* vidioc_try_fmt_vid_cap - set video capture format |
|
* @file: descriptor of device |
|
* @priv: unused |
|
* @f: new format |
|
* |
|
* new video format is set which includes width and |
|
* field type. width is fixed to 720, no scaling. |
|
* Only UYVY is supported by this hardware. |
|
* the minimum height is 200, the maximum is 576 (PAL) |
|
* |
|
* return value: 0, no error |
|
* |
|
* -EINVAL, pixel or field format not supported |
|
* |
|
*/ |
|
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, |
|
struct v4l2_format *f) |
|
{ |
|
struct sta2x11_vip *vip = video_drvdata(file); |
|
int interlace_lim; |
|
|
|
if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) { |
|
v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (V4L2_STD_525_60 & vip->std) |
|
interlace_lim = 240; |
|
else |
|
interlace_lim = 288; |
|
|
|
switch (f->fmt.pix.field) { |
|
default: |
|
case V4L2_FIELD_ANY: |
|
if (interlace_lim < f->fmt.pix.height) |
|
f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
|
else |
|
f->fmt.pix.field = V4L2_FIELD_BOTTOM; |
|
break; |
|
case V4L2_FIELD_TOP: |
|
case V4L2_FIELD_BOTTOM: |
|
if (interlace_lim < f->fmt.pix.height) |
|
f->fmt.pix.height = interlace_lim; |
|
break; |
|
case V4L2_FIELD_INTERLACED: |
|
break; |
|
} |
|
|
|
/* It is the only supported format */ |
|
f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; |
|
f->fmt.pix.height &= ~1; |
|
if (2 * interlace_lim < f->fmt.pix.height) |
|
f->fmt.pix.height = 2 * interlace_lim; |
|
if (200 > f->fmt.pix.height) |
|
f->fmt.pix.height = 200; |
|
f->fmt.pix.width = 720; |
|
f->fmt.pix.bytesperline = f->fmt.pix.width * 2; |
|
f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height; |
|
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
|
return 0; |
|
} |
|
|
|
/** |
|
* vidioc_s_fmt_vid_cap - set current video format parameters |
|
* @file: descriptor of device |
|
* @priv: unused |
|
* @f: returned format information |
|
* |
|
* set new capture format |
|
* return value: 0, no error |
|
* |
|
* other, delivered by video DAC routine. |
|
*/ |
|
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
|
struct v4l2_format *f) |
|
{ |
|
struct sta2x11_vip *vip = video_drvdata(file); |
|
unsigned int t_stop, b_stop, pitch; |
|
int ret; |
|
|
|
ret = vidioc_try_fmt_vid_cap(file, priv, f); |
|
if (ret) |
|
return ret; |
|
|
|
if (vb2_is_busy(&vip->vb_vidq)) { |
|
/* Can't change format during acquisition */ |
|
v4l2_err(&vip->v4l2_dev, "device busy\n"); |
|
return -EBUSY; |
|
} |
|
vip->format = f->fmt.pix; |
|
switch (vip->format.field) { |
|
case V4L2_FIELD_INTERLACED: |
|
t_stop = ((vip->format.height / 2 - 1) << 16) | |
|
(2 * vip->format.width - 1); |
|
b_stop = t_stop; |
|
pitch = 4 * vip->format.width; |
|
break; |
|
case V4L2_FIELD_TOP: |
|
t_stop = ((vip->format.height - 1) << 16) | |
|
(2 * vip->format.width - 1); |
|
b_stop = (0 << 16) | (2 * vip->format.width - 1); |
|
pitch = 2 * vip->format.width; |
|
break; |
|
case V4L2_FIELD_BOTTOM: |
|
t_stop = (0 << 16) | (2 * vip->format.width - 1); |
|
b_stop = (vip->format.height << 16) | |
|
(2 * vip->format.width - 1); |
|
pitch = 2 * vip->format.width; |
|
break; |
|
default: |
|
v4l2_err(&vip->v4l2_dev, "unknown field format\n"); |
|
return -EINVAL; |
|
} |
|
|
|
spin_lock_irq(&vip->slock); |
|
/* Y-X Top Field Offset */ |
|
reg_write(vip, DVP_TFO, 0); |
|
/* Y-X Bottom Field Offset */ |
|
reg_write(vip, DVP_BFO, 0); |
|
/* Y-X Top Field Stop*/ |
|
reg_write(vip, DVP_TFS, t_stop); |
|
/* Y-X Bottom Field Stop */ |
|
reg_write(vip, DVP_BFS, b_stop); |
|
/* Video Memory Pitch */ |
|
reg_write(vip, DVP_VMP, pitch); |
|
spin_unlock_irq(&vip->slock); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* vidioc_g_fmt_vid_cap - get current video format parameters |
|
* @file: descriptor of device |
|
* @priv: unused |
|
* @f: contains format information |
|
* |
|
* returns current video format parameters |
|
* |
|
* return value: 0, always successful |
|
*/ |
|
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
|
struct v4l2_format *f) |
|
{ |
|
struct sta2x11_vip *vip = video_drvdata(file); |
|
|
|
f->fmt.pix = vip->format; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct v4l2_ioctl_ops vip_ioctl_ops = { |
|
.vidioc_querycap = vidioc_querycap, |
|
/* FMT handling */ |
|
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
|
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
|
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
|
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
|
/* Buffer handlers */ |
|
.vidioc_create_bufs = vb2_ioctl_create_bufs, |
|
.vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
|
.vidioc_reqbufs = vb2_ioctl_reqbufs, |
|
.vidioc_querybuf = vb2_ioctl_querybuf, |
|
.vidioc_qbuf = vb2_ioctl_qbuf, |
|
.vidioc_dqbuf = vb2_ioctl_dqbuf, |
|
/* Stream on/off */ |
|
.vidioc_streamon = vb2_ioctl_streamon, |
|
.vidioc_streamoff = vb2_ioctl_streamoff, |
|
/* Standard handling */ |
|
.vidioc_g_std = vidioc_g_std, |
|
.vidioc_s_std = vidioc_s_std, |
|
.vidioc_querystd = vidioc_querystd, |
|
/* Input handling */ |
|
.vidioc_enum_input = vidioc_enum_input, |
|
.vidioc_g_input = vidioc_g_input, |
|
.vidioc_s_input = vidioc_s_input, |
|
/* Log status ioctl */ |
|
.vidioc_log_status = v4l2_ctrl_log_status, |
|
/* Event handling */ |
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
|
}; |
|
|
|
static const struct video_device video_dev_template = { |
|
.name = KBUILD_MODNAME, |
|
.release = video_device_release_empty, |
|
.fops = &vip_fops, |
|
.ioctl_ops = &vip_ioctl_ops, |
|
.tvnorms = V4L2_STD_ALL, |
|
.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | |
|
V4L2_CAP_STREAMING, |
|
}; |
|
|
|
/** |
|
* vip_irq - interrupt routine |
|
* @irq: Number of interrupt ( not used, correct number is assumed ) |
|
* @vip: local data structure containing all information |
|
* |
|
* check for both frame interrupts set ( top and bottom ). |
|
* check FIFO overflow, but limit number of log messages after open. |
|
* signal a complete buffer if done |
|
* |
|
* return value: IRQ_NONE, interrupt was not generated by VIP |
|
* |
|
* IRQ_HANDLED, interrupt done. |
|
*/ |
|
static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip) |
|
{ |
|
unsigned int status; |
|
|
|
status = reg_read(vip, DVP_ITS); |
|
|
|
if (!status) /* No interrupt to handle */ |
|
return IRQ_NONE; |
|
|
|
if (status & DVP_IT_FIFO) |
|
if (vip->overflow++ > 5) |
|
pr_info("VIP: fifo overflow\n"); |
|
|
|
if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) { |
|
/* this is bad, we are too slow, hope the condition is gone |
|
* on the next frame */ |
|
return IRQ_HANDLED; |
|
} |
|
|
|
if (status & DVP_IT_VST) |
|
if ((++vip->tcount) < 2) |
|
return IRQ_HANDLED; |
|
if (status & DVP_IT_VSB) { |
|
vip->bcount++; |
|
return IRQ_HANDLED; |
|
} |
|
|
|
if (vip->active) { /* Acquisition is over on this buffer */ |
|
/* Disable acquisition */ |
|
reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA); |
|
/* Remove the active buffer from the list */ |
|
vip->active->vb.vb2_buf.timestamp = ktime_get_ns(); |
|
vip->active->vb.sequence = vip->sequence++; |
|
vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE); |
|
} |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static void sta2x11_vip_init_register(struct sta2x11_vip *vip) |
|
{ |
|
/* Register initialization */ |
|
spin_lock_irq(&vip->slock); |
|
/* Clean interrupt */ |
|
reg_read(vip, DVP_ITS); |
|
/* Enable Half Line per vertical */ |
|
reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD); |
|
/* Reset VIP control */ |
|
reg_write(vip, DVP_CTL, DVP_CTL_RST); |
|
/* Clear VIP control */ |
|
reg_write(vip, DVP_CTL, 0); |
|
spin_unlock_irq(&vip->slock); |
|
} |
|
static void sta2x11_vip_clear_register(struct sta2x11_vip *vip) |
|
{ |
|
spin_lock_irq(&vip->slock); |
|
/* Disable interrupt */ |
|
reg_write(vip, DVP_ITM, 0); |
|
/* Reset VIP Control */ |
|
reg_write(vip, DVP_CTL, DVP_CTL_RST); |
|
/* Clear VIP Control */ |
|
reg_write(vip, DVP_CTL, 0); |
|
/* Clean VIP Interrupt */ |
|
reg_read(vip, DVP_ITS); |
|
spin_unlock_irq(&vip->slock); |
|
} |
|
static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip) |
|
{ |
|
int err; |
|
|
|
err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29)); |
|
if (err) { |
|
v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask"); |
|
return err; |
|
} |
|
memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue)); |
|
vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ; |
|
vip->vb_vidq.drv_priv = vip; |
|
vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer); |
|
vip->vb_vidq.ops = &vip_video_qops; |
|
vip->vb_vidq.mem_ops = &vb2_dma_contig_memops; |
|
vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
|
vip->vb_vidq.dev = &vip->pdev->dev; |
|
vip->vb_vidq.lock = &vip->v4l_lock; |
|
err = vb2_queue_init(&vip->vb_vidq); |
|
if (err) |
|
return err; |
|
INIT_LIST_HEAD(&vip->buffer_list); |
|
spin_lock_init(&vip->lock); |
|
return 0; |
|
} |
|
|
|
static int sta2x11_vip_init_controls(struct sta2x11_vip *vip) |
|
{ |
|
/* |
|
* Inititialize an empty control so VIP can inerithing controls |
|
* from ADV7180 |
|
*/ |
|
v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0); |
|
|
|
vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl; |
|
if (vip->ctrl_hdl.error) { |
|
int err = vip->ctrl_hdl.error; |
|
|
|
v4l2_ctrl_handler_free(&vip->ctrl_hdl); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* vip_gpio_reserve - reserve gpio pin |
|
* @dev: device |
|
* @pin: GPIO pin number |
|
* @dir: direction, input or output |
|
* @name: GPIO pin name |
|
* |
|
*/ |
|
static int vip_gpio_reserve(struct device *dev, int pin, int dir, |
|
const char *name) |
|
{ |
|
int ret = -ENODEV; |
|
|
|
if (!gpio_is_valid(pin)) |
|
return ret; |
|
|
|
ret = gpio_request(pin, name); |
|
if (ret) { |
|
dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name); |
|
return ret; |
|
} |
|
|
|
ret = gpio_direction_output(pin, dir); |
|
if (ret) { |
|
dev_err(dev, "Failed to set direction for pin %d (%s)\n", |
|
pin, name); |
|
gpio_free(pin); |
|
return ret; |
|
} |
|
|
|
ret = gpio_export(pin, false); |
|
if (ret) { |
|
dev_err(dev, "Failed to export pin %d (%s)\n", pin, name); |
|
gpio_free(pin); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* vip_gpio_release - release gpio pin |
|
* @dev: device |
|
* @pin: GPIO pin number |
|
* @name: GPIO pin name |
|
* |
|
*/ |
|
static void vip_gpio_release(struct device *dev, int pin, const char *name) |
|
{ |
|
if (gpio_is_valid(pin)) { |
|
dev_dbg(dev, "releasing pin %d (%s)\n", pin, name); |
|
gpio_unexport(pin); |
|
gpio_free(pin); |
|
} |
|
} |
|
|
|
/** |
|
* sta2x11_vip_init_one - init one instance of video device |
|
* @pdev: PCI device |
|
* @ent: (not used) |
|
* |
|
* allocate reset pins for DAC. |
|
* Reset video DAC, this is done via reset line. |
|
* allocate memory for managing device |
|
* request interrupt |
|
* map IO region |
|
* register device |
|
* find and initialize video DAC |
|
* |
|
* return value: 0, no error |
|
* |
|
* -ENOMEM, no memory |
|
* |
|
* -ENODEV, device could not be detected or registered |
|
*/ |
|
static int sta2x11_vip_init_one(struct pci_dev *pdev, |
|
const struct pci_device_id *ent) |
|
{ |
|
int ret; |
|
struct sta2x11_vip *vip; |
|
struct vip_config *config; |
|
|
|
/* Check if hardware support 26-bit DMA */ |
|
if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) { |
|
dev_err(&pdev->dev, "26-bit DMA addressing not available\n"); |
|
return -EINVAL; |
|
} |
|
/* Enable PCI */ |
|
ret = pci_enable_device(pdev); |
|
if (ret) |
|
return ret; |
|
|
|
/* Get VIP platform data */ |
|
config = dev_get_platdata(&pdev->dev); |
|
if (!config) { |
|
dev_info(&pdev->dev, "VIP slot disabled\n"); |
|
ret = -EINVAL; |
|
goto disable; |
|
} |
|
|
|
/* Power configuration */ |
|
ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0, |
|
config->pwr_name); |
|
if (ret) |
|
goto disable; |
|
|
|
ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0, |
|
config->reset_name); |
|
if (ret) { |
|
vip_gpio_release(&pdev->dev, config->pwr_pin, |
|
config->pwr_name); |
|
goto disable; |
|
} |
|
|
|
if (gpio_is_valid(config->pwr_pin)) { |
|
/* Datasheet says 5ms between PWR and RST */ |
|
usleep_range(5000, 25000); |
|
gpio_direction_output(config->pwr_pin, 1); |
|
} |
|
|
|
if (gpio_is_valid(config->reset_pin)) { |
|
/* Datasheet says 5ms between PWR and RST */ |
|
usleep_range(5000, 25000); |
|
gpio_direction_output(config->reset_pin, 1); |
|
} |
|
usleep_range(5000, 25000); |
|
|
|
/* Allocate a new VIP instance */ |
|
vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL); |
|
if (!vip) { |
|
ret = -ENOMEM; |
|
goto release_gpios; |
|
} |
|
vip->pdev = pdev; |
|
vip->std = V4L2_STD_PAL; |
|
vip->format = formats_50[0]; |
|
vip->config = config; |
|
mutex_init(&vip->v4l_lock); |
|
|
|
ret = sta2x11_vip_init_controls(vip); |
|
if (ret) |
|
goto free_mem; |
|
ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev); |
|
if (ret) |
|
goto free_mem; |
|
|
|
dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n", |
|
(unsigned long)pci_resource_start(pdev, 0), |
|
(unsigned long)pci_resource_len(pdev, 0), pdev->irq); |
|
|
|
pci_set_master(pdev); |
|
|
|
ret = pci_request_regions(pdev, KBUILD_MODNAME); |
|
if (ret) |
|
goto unreg; |
|
|
|
vip->iomem = pci_iomap(pdev, 0, 0x100); |
|
if (!vip->iomem) { |
|
ret = -ENOMEM; |
|
goto release; |
|
} |
|
|
|
pci_enable_msi(pdev); |
|
|
|
/* Initialize buffer */ |
|
ret = sta2x11_vip_init_buffer(vip); |
|
if (ret) |
|
goto unmap; |
|
|
|
spin_lock_init(&vip->slock); |
|
|
|
ret = request_irq(pdev->irq, |
|
(irq_handler_t) vip_irq, |
|
IRQF_SHARED, KBUILD_MODNAME, vip); |
|
if (ret) { |
|
dev_err(&pdev->dev, "request_irq failed\n"); |
|
ret = -ENODEV; |
|
goto release_buf; |
|
} |
|
|
|
/* Initialize and register video device */ |
|
vip->video_dev = video_dev_template; |
|
vip->video_dev.v4l2_dev = &vip->v4l2_dev; |
|
vip->video_dev.queue = &vip->vb_vidq; |
|
vip->video_dev.lock = &vip->v4l_lock; |
|
video_set_drvdata(&vip->video_dev, vip); |
|
|
|
ret = video_register_device(&vip->video_dev, VFL_TYPE_VIDEO, -1); |
|
if (ret) |
|
goto vrelease; |
|
|
|
/* Get ADV7180 subdevice */ |
|
vip->adapter = i2c_get_adapter(vip->config->i2c_id); |
|
if (!vip->adapter) { |
|
ret = -ENODEV; |
|
dev_err(&pdev->dev, "no I2C adapter found\n"); |
|
goto vunreg; |
|
} |
|
|
|
vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter, |
|
"adv7180", vip->config->i2c_addr, |
|
NULL); |
|
if (!vip->decoder) { |
|
ret = -ENODEV; |
|
dev_err(&pdev->dev, "no decoder found\n"); |
|
goto vunreg; |
|
} |
|
|
|
i2c_put_adapter(vip->adapter); |
|
v4l2_subdev_call(vip->decoder, core, init, 0); |
|
|
|
sta2x11_vip_init_register(vip); |
|
|
|
dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n"); |
|
return 0; |
|
|
|
vunreg: |
|
video_set_drvdata(&vip->video_dev, NULL); |
|
vrelease: |
|
vb2_video_unregister_device(&vip->video_dev); |
|
free_irq(pdev->irq, vip); |
|
release_buf: |
|
pci_disable_msi(pdev); |
|
unmap: |
|
pci_iounmap(pdev, vip->iomem); |
|
release: |
|
pci_release_regions(pdev); |
|
unreg: |
|
v4l2_device_unregister(&vip->v4l2_dev); |
|
free_mem: |
|
kfree(vip); |
|
release_gpios: |
|
vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name); |
|
vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name); |
|
disable: |
|
/* |
|
* do not call pci_disable_device on sta2x11 because it break all |
|
* other Bus masters on this EP |
|
*/ |
|
return ret; |
|
} |
|
|
|
/** |
|
* sta2x11_vip_remove_one - release device |
|
* @pdev: PCI device |
|
* |
|
* Undo everything done in .._init_one |
|
* |
|
* unregister video device |
|
* free interrupt |
|
* unmap ioadresses |
|
* free memory |
|
* free GPIO pins |
|
*/ |
|
static void sta2x11_vip_remove_one(struct pci_dev *pdev) |
|
{ |
|
struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); |
|
struct sta2x11_vip *vip = |
|
container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); |
|
|
|
sta2x11_vip_clear_register(vip); |
|
|
|
video_set_drvdata(&vip->video_dev, NULL); |
|
vb2_video_unregister_device(&vip->video_dev); |
|
free_irq(pdev->irq, vip); |
|
pci_disable_msi(pdev); |
|
pci_iounmap(pdev, vip->iomem); |
|
pci_release_regions(pdev); |
|
|
|
v4l2_device_unregister(&vip->v4l2_dev); |
|
|
|
vip_gpio_release(&pdev->dev, vip->config->pwr_pin, |
|
vip->config->pwr_name); |
|
vip_gpio_release(&pdev->dev, vip->config->reset_pin, |
|
vip->config->reset_name); |
|
|
|
kfree(vip); |
|
/* |
|
* do not call pci_disable_device on sta2x11 because it break all |
|
* other Bus masters on this EP |
|
*/ |
|
} |
|
|
|
/** |
|
* sta2x11_vip_suspend - set device into power save mode |
|
* @dev_d: PCI device |
|
* |
|
* all relevant registers are saved and an attempt to set a new state is made. |
|
* |
|
* return value: 0 always indicate success, |
|
* even if device could not be disabled. (workaround for hardware problem) |
|
*/ |
|
static int __maybe_unused sta2x11_vip_suspend(struct device *dev_d) |
|
{ |
|
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); |
|
struct sta2x11_vip *vip = |
|
container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); |
|
unsigned long flags; |
|
int i; |
|
|
|
spin_lock_irqsave(&vip->slock, flags); |
|
vip->register_save_area[0] = reg_read(vip, DVP_CTL); |
|
reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS); |
|
vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM); |
|
reg_write(vip, DVP_ITM, 0); |
|
for (i = 1; i < SAVE_COUNT; i++) |
|
vip->register_save_area[i] = reg_read(vip, 4 * i); |
|
for (i = 0; i < AUX_COUNT; i++) |
|
vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] = |
|
reg_read(vip, registers_to_save[i]); |
|
spin_unlock_irqrestore(&vip->slock, flags); |
|
|
|
vip->disabled = 1; |
|
|
|
pr_info("VIP: suspend\n"); |
|
return 0; |
|
} |
|
|
|
/** |
|
* sta2x11_vip_resume - resume device operation |
|
* @dev_d : PCI device |
|
* |
|
* return value: 0, no error. |
|
* |
|
* other, could not set device to power on state. |
|
*/ |
|
static int __maybe_unused sta2x11_vip_resume(struct device *dev_d) |
|
{ |
|
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d); |
|
struct sta2x11_vip *vip = |
|
container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev); |
|
unsigned long flags; |
|
int i; |
|
|
|
pr_info("VIP: resume\n"); |
|
|
|
vip->disabled = 0; |
|
|
|
spin_lock_irqsave(&vip->slock, flags); |
|
for (i = 1; i < SAVE_COUNT; i++) |
|
reg_write(vip, 4 * i, vip->register_save_area[i]); |
|
for (i = 0; i < AUX_COUNT; i++) |
|
reg_write(vip, registers_to_save[i], |
|
vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]); |
|
reg_write(vip, DVP_CTL, vip->register_save_area[0]); |
|
reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]); |
|
spin_unlock_irqrestore(&vip->slock, flags); |
|
return 0; |
|
} |
|
|
|
static const struct pci_device_id sta2x11_vip_pci_tbl[] = { |
|
{PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)}, |
|
{0,} |
|
}; |
|
|
|
static SIMPLE_DEV_PM_OPS(sta2x11_vip_pm_ops, |
|
sta2x11_vip_suspend, |
|
sta2x11_vip_resume); |
|
|
|
static struct pci_driver sta2x11_vip_driver = { |
|
.name = KBUILD_MODNAME, |
|
.probe = sta2x11_vip_init_one, |
|
.remove = sta2x11_vip_remove_one, |
|
.id_table = sta2x11_vip_pci_tbl, |
|
.driver.pm = &sta2x11_vip_pm_ops, |
|
}; |
|
|
|
static int __init sta2x11_vip_init_module(void) |
|
{ |
|
return pci_register_driver(&sta2x11_vip_driver); |
|
} |
|
|
|
static void __exit sta2x11_vip_exit_module(void) |
|
{ |
|
pci_unregister_driver(&sta2x11_vip_driver); |
|
} |
|
|
|
#ifdef MODULE |
|
module_init(sta2x11_vip_init_module); |
|
module_exit(sta2x11_vip_exit_module); |
|
#else |
|
late_initcall_sync(sta2x11_vip_init_module); |
|
#endif |
|
|
|
MODULE_DESCRIPTION("STA2X11 Video Input Port driver"); |
|
MODULE_AUTHOR("Wind River"); |
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_VERSION(DRV_VERSION); |
|
MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);
|
|
|