1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar 4 * 5 * Copyright (C) 2015 Industrial Research Institute for Automation 6 * and Measurements PIAP 7 * Written by Krzysztof Ha?asa 8 */ 9 10 #include <linux/mutex.h> 11 #include <linux/pci.h> 12 #include <linux/timer.h> 13 #include <linux/videodev2.h> 14 #include <media/v4l2-common.h> 15 #include <media/v4l2-ctrls.h> 16 #include <media/v4l2-device.h> 17 #include <media/v4l2-ioctl.h> 18 #include <media/videobuf2-v4l2.h> 19 #include <sound/pcm.h> 20 21 #include "tw686x-regs.h" 22 23 #define TYPE_MAX_CHANNELS 0x0f 24 #define TYPE_SECOND_GEN 0x10 25 #define TW686X_DEF_PHASE_REF 0x1518 26 27 #define TW686X_AUDIO_PAGE_MAX 16 28 #define TW686X_AUDIO_PERIODS_MIN 2 29 #define TW686X_AUDIO_PERIODS_MAX TW686X_AUDIO_PAGE_MAX 30 31 #define TW686X_DMA_MODE_MEMCPY 0 32 #define TW686X_DMA_MODE_CONTIG 1 33 #define TW686X_DMA_MODE_SG 2 34 35 struct tw686x_format { 36 char *name; 37 unsigned int fourcc; 38 unsigned int depth; 39 unsigned int mode; 40 }; 41 42 struct tw686x_dma_desc { 43 dma_addr_t phys; 44 void *virt; 45 unsigned int size; 46 }; 47 48 struct tw686x_sg_desc { 49 /* 3 MSBits for flags, 13 LSBits for length */ 50 __le32 flags_length; 51 __le32 phys; 52 }; 53 54 struct tw686x_audio_buf { 55 dma_addr_t dma; 56 void *virt; 57 struct list_head list; 58 }; 59 60 struct tw686x_v4l2_buf { 61 struct vb2_v4l2_buffer vb; 62 struct list_head list; 63 }; 64 65 struct tw686x_audio_channel { 66 struct tw686x_dev *dev; 67 struct snd_pcm_substream *ss; 68 unsigned int ch; 69 struct tw686x_audio_buf *curr_bufs[2]; 70 struct tw686x_dma_desc dma_descs[2]; 71 dma_addr_t ptr; 72 73 struct tw686x_audio_buf buf[TW686X_AUDIO_PAGE_MAX]; 74 struct list_head buf_list; 75 spinlock_t lock; 76 }; 77 78 struct tw686x_video_channel { 79 struct tw686x_dev *dev; 80 81 struct vb2_queue vidq; 82 struct list_head vidq_queued; 83 struct video_device *device; 84 struct tw686x_v4l2_buf *curr_bufs[2]; 85 struct tw686x_dma_desc dma_descs[2]; 86 struct tw686x_sg_desc *sg_descs[2]; 87 88 struct v4l2_ctrl_handler ctrl_handler; 89 const struct tw686x_format *format; 90 struct mutex vb_mutex; 91 spinlock_t qlock; 92 v4l2_std_id video_standard; 93 unsigned int width, height; 94 unsigned int h_halve, v_halve; 95 unsigned int ch; 96 unsigned int num; 97 unsigned int fps; 98 unsigned int input; 99 unsigned int sequence; 100 unsigned int pb; 101 bool no_signal; 102 }; 103 104 struct tw686x_dma_ops { 105 int (*setup)(struct tw686x_dev *dev); 106 int (*alloc)(struct tw686x_video_channel *vc, unsigned int pb); 107 void (*free)(struct tw686x_video_channel *vc, unsigned int pb); 108 void (*buf_refill)(struct tw686x_video_channel *vc, unsigned int pb); 109 const struct vb2_mem_ops *mem_ops; 110 enum v4l2_field field; 111 u32 hw_dma_mode; 112 }; 113 114 /* struct tw686x_dev - global device status */ 115 struct tw686x_dev { 116 /* 117 * spinlock controlling access to the shared device registers 118 * (DMA enable/disable) 119 */ 120 spinlock_t lock; 121 122 struct v4l2_device v4l2_dev; 123 struct snd_card *snd_card; 124 125 char name[32]; 126 unsigned int type; 127 unsigned int dma_mode; 128 struct pci_dev *pci_dev; 129 __u32 __iomem *mmio; 130 131 const struct tw686x_dma_ops *dma_ops; 132 struct tw686x_video_channel *video_channels; 133 struct tw686x_audio_channel *audio_channels; 134 135 /* Per-device audio parameters */ 136 int audio_rate; 137 int period_size; 138 int audio_enabled; 139 140 struct timer_list dma_delay_timer; 141 u32 pending_dma_en; /* must be protected by lock */ 142 u32 pending_dma_cmd; /* must be protected by lock */ 143 }; 144 145 static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg) 146 { 147 return readl(dev->mmio + reg); 148 } 149 150 static inline void reg_write(struct tw686x_dev *dev, unsigned int reg, 151 uint32_t value) 152 { 153 writel(value, dev->mmio + reg); 154 } 155 156 static inline unsigned int max_channels(struct tw686x_dev *dev) 157 { 158 return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */ 159 } 160 161 static inline unsigned is_second_gen(struct tw686x_dev *dev) 162 { 163 /* each channel has its own DMA SG table */ 164 return dev->type & TYPE_SECOND_GEN; 165 } 166 167 void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel); 168 void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel); 169 170 int tw686x_video_init(struct tw686x_dev *dev); 171 void tw686x_video_free(struct tw686x_dev *dev); 172 void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests, 173 unsigned int pb_status, unsigned int fifo_status, 174 unsigned int *reset_ch); 175 176 int tw686x_audio_init(struct tw686x_dev *dev); 177 void tw686x_audio_free(struct tw686x_dev *dev); 178 void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests, 179 unsigned int pb_status); 180