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704a84cc EG |
1 | /* |
2 | * Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar | |
3 | * | |
4 | * Copyright (C) 2015 Industrial Research Institute for Automation | |
5 | * and Measurements PIAP | |
6 | * Written by Krzysztof Ha?asa | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of version 2 of the GNU General Public License | |
10 | * as published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/mutex.h> | |
14 | #include <linux/pci.h> | |
15 | #include <linux/timer.h> | |
16 | #include <linux/videodev2.h> | |
17 | #include <media/v4l2-common.h> | |
18 | #include <media/v4l2-ctrls.h> | |
19 | #include <media/v4l2-device.h> | |
20 | #include <media/v4l2-ioctl.h> | |
21 | #include <media/videobuf2-v4l2.h> | |
22 | #include <sound/pcm.h> | |
23 | ||
24 | #include "tw686x-regs.h" | |
25 | ||
26 | #define TYPE_MAX_CHANNELS 0x0f | |
27 | #define TYPE_SECOND_GEN 0x10 | |
28 | #define TW686X_DEF_PHASE_REF 0x1518 | |
29 | ||
30 | #define TW686X_FIELD_MODE 0x3 | |
31 | #define TW686X_FRAME_MODE 0x2 | |
32 | /* 0x1 is reserved */ | |
33 | #define TW686X_SG_MODE 0x0 | |
34 | ||
35 | #define TW686X_AUDIO_PAGE_SZ 4096 | |
36 | #define TW686X_AUDIO_PAGE_MAX 16 | |
37 | #define TW686X_AUDIO_PERIODS_MIN 2 | |
38 | #define TW686X_AUDIO_PERIODS_MAX TW686X_AUDIO_PAGE_MAX | |
39 | ||
40 | struct tw686x_format { | |
41 | char *name; | |
42 | unsigned int fourcc; | |
43 | unsigned int depth; | |
44 | unsigned int mode; | |
45 | }; | |
46 | ||
47 | struct tw686x_dma_desc { | |
48 | dma_addr_t phys; | |
49 | void *virt; | |
50 | unsigned int size; | |
51 | }; | |
52 | ||
53 | struct tw686x_audio_buf { | |
54 | dma_addr_t dma; | |
55 | void *virt; | |
56 | struct list_head list; | |
57 | }; | |
58 | ||
59 | struct tw686x_v4l2_buf { | |
60 | struct vb2_v4l2_buffer vb; | |
61 | struct list_head list; | |
62 | }; | |
63 | ||
64 | struct tw686x_audio_channel { | |
65 | struct tw686x_dev *dev; | |
66 | struct snd_pcm_substream *ss; | |
67 | unsigned int ch; | |
68 | struct tw686x_audio_buf *curr_bufs[2]; | |
69 | struct tw686x_dma_desc dma_descs[2]; | |
70 | dma_addr_t ptr; | |
71 | ||
72 | struct tw686x_audio_buf buf[TW686X_AUDIO_PAGE_MAX]; | |
73 | struct list_head buf_list; | |
74 | spinlock_t lock; | |
75 | }; | |
76 | ||
77 | struct tw686x_video_channel { | |
78 | struct tw686x_dev *dev; | |
79 | ||
80 | struct vb2_queue vidq; | |
81 | struct list_head vidq_queued; | |
82 | struct video_device *device; | |
83 | struct tw686x_v4l2_buf *curr_bufs[2]; | |
84 | struct tw686x_dma_desc dma_descs[2]; | |
85 | ||
86 | struct v4l2_ctrl_handler ctrl_handler; | |
87 | const struct tw686x_format *format; | |
88 | struct mutex vb_mutex; | |
89 | spinlock_t qlock; | |
90 | v4l2_std_id video_standard; | |
91 | unsigned int width, height; | |
92 | unsigned int h_halve, v_halve; | |
93 | unsigned int ch; | |
94 | unsigned int num; | |
95 | unsigned int fps; | |
96 | unsigned int input; | |
97 | unsigned int sequence; | |
98 | unsigned int pb; | |
99 | bool no_signal; | |
100 | }; | |
101 | ||
102 | /** | |
103 | * struct tw686x_dev - global device status | |
104 | * @lock: spinlock controlling access to the | |
105 | * shared device registers (DMA enable/disable). | |
106 | */ | |
107 | struct tw686x_dev { | |
108 | spinlock_t lock; | |
109 | ||
110 | struct v4l2_device v4l2_dev; | |
111 | struct snd_card *snd_card; | |
112 | ||
113 | char name[32]; | |
114 | unsigned int type; | |
115 | struct pci_dev *pci_dev; | |
116 | __u32 __iomem *mmio; | |
117 | ||
118 | void *alloc_ctx; | |
119 | ||
120 | struct tw686x_video_channel *video_channels; | |
121 | struct tw686x_audio_channel *audio_channels; | |
122 | ||
123 | int audio_rate; /* per-device value */ | |
124 | ||
125 | struct timer_list dma_delay_timer; | |
126 | u32 pending_dma_en; /* must be protected by lock */ | |
127 | u32 pending_dma_cmd; /* must be protected by lock */ | |
128 | }; | |
129 | ||
130 | static inline uint32_t reg_read(struct tw686x_dev *dev, unsigned int reg) | |
131 | { | |
132 | return readl(dev->mmio + reg); | |
133 | } | |
134 | ||
135 | static inline void reg_write(struct tw686x_dev *dev, unsigned int reg, | |
136 | uint32_t value) | |
137 | { | |
138 | writel(value, dev->mmio + reg); | |
139 | } | |
140 | ||
141 | static inline unsigned int max_channels(struct tw686x_dev *dev) | |
142 | { | |
143 | return dev->type & TYPE_MAX_CHANNELS; /* 4 or 8 channels */ | |
144 | } | |
145 | ||
146 | void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel); | |
147 | void tw686x_disable_channel(struct tw686x_dev *dev, unsigned int channel); | |
148 | ||
149 | int tw686x_video_init(struct tw686x_dev *dev); | |
150 | void tw686x_video_free(struct tw686x_dev *dev); | |
151 | void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests, | |
152 | unsigned int pb_status, unsigned int fifo_status, | |
153 | unsigned int *reset_ch); | |
154 | ||
155 | int tw686x_audio_init(struct tw686x_dev *dev); | |
156 | void tw686x_audio_free(struct tw686x_dev *dev); | |
157 | void tw686x_audio_irq(struct tw686x_dev *dev, unsigned long requests, | |
158 | unsigned int pb_status); |