1 /*
2 * Marvell camera core structures.
3 *
4 * Copyright 2011 Jonathan Corbet corbet@lwn.net
5 */
6 #ifndef _MCAM_CORE_H
7 #define _MCAM_CORE_H
8
9 #include <linux/list.h>
10 #include <media/v4l2-common.h>
11 #include <media/v4l2-ctrls.h>
12 #include <media/v4l2-dev.h>
13 #include <media/videobuf2-v4l2.h>
14
15 /*
16 * Create our own symbols for the supported buffer modes, but, for now,
17 * base them entirely on which videobuf2 options have been selected.
18 */
19 #if IS_ENABLED(CONFIG_VIDEOBUF2_VMALLOC)
20 #define MCAM_MODE_VMALLOC 1
21 #endif
22
23 #if IS_ENABLED(CONFIG_VIDEOBUF2_DMA_CONTIG)
24 #define MCAM_MODE_DMA_CONTIG 1
25 #endif
26
27 #if IS_ENABLED(CONFIG_VIDEOBUF2_DMA_SG)
28 #define MCAM_MODE_DMA_SG 1
29 #endif
30
31 #if !defined(MCAM_MODE_VMALLOC) && !defined(MCAM_MODE_DMA_CONTIG) && \
32 !defined(MCAM_MODE_DMA_SG)
33 #error One of the videobuf buffer modes must be selected in the config
34 #endif
35
36
37 enum mcam_state {
38 S_NOTREADY, /* Not yet initialized */
39 S_IDLE, /* Just hanging around */
40 S_FLAKED, /* Some sort of problem */
41 S_STREAMING, /* Streaming data */
42 S_BUFWAIT /* streaming requested but no buffers yet */
43 };
44 #define MAX_DMA_BUFS 3
45
46 /*
47 * Different platforms work best with different buffer modes, so we
48 * let the platform pick.
49 */
50 enum mcam_buffer_mode {
51 B_vmalloc = 0,
52 B_DMA_contig = 1,
53 B_DMA_sg = 2
54 };
55
56 enum mcam_chip_id {
57 MCAM_CAFE,
58 MCAM_ARMADA610,
59 };
60
61 /*
62 * Is a given buffer mode supported by the current kernel configuration?
63 */
mcam_buffer_mode_supported(enum mcam_buffer_mode mode)64 static inline int mcam_buffer_mode_supported(enum mcam_buffer_mode mode)
65 {
66 switch (mode) {
67 #ifdef MCAM_MODE_VMALLOC
68 case B_vmalloc:
69 #endif
70 #ifdef MCAM_MODE_DMA_CONTIG
71 case B_DMA_contig:
72 #endif
73 #ifdef MCAM_MODE_DMA_SG
74 case B_DMA_sg:
75 #endif
76 return 1;
77 default:
78 return 0;
79 }
80 }
81
82 /*
83 * Basic frame states
84 */
85 struct mcam_frame_state {
86 unsigned int frames;
87 unsigned int singles;
88 unsigned int delivered;
89 };
90
91 #define NR_MCAM_CLK 3
92
93 /*
94 * A description of one of our devices.
95 * Locking: controlled by s_mutex. Certain fields, however, require
96 * the dev_lock spinlock; they are marked as such by comments.
97 * dev_lock is also required for access to device registers.
98 */
99 struct mcam_camera {
100 /*
101 * These fields should be set by the platform code prior to
102 * calling mcam_register().
103 */
104 struct i2c_adapter *i2c_adapter;
105 unsigned char __iomem *regs;
106 unsigned regs_size; /* size in bytes of the register space */
107 spinlock_t dev_lock;
108 struct device *dev; /* For messages, dma alloc */
109 enum mcam_chip_id chip_id;
110 short int clock_speed; /* Sensor clock speed, default 30 */
111 short int use_smbus; /* SMBUS or straight I2c? */
112 enum mcam_buffer_mode buffer_mode;
113
114 int mclk_min; /* The minimal value of mclk */
115 int mclk_src; /* which clock source the mclk derives from */
116 int mclk_div; /* Clock Divider Value for MCLK */
117
118 int ccic_id;
119 enum v4l2_mbus_type bus_type;
120 /* MIPI support */
121 /* The dphy config value, allocated in board file
122 * dphy[0]: DPHY3
123 * dphy[1]: DPHY5
124 * dphy[2]: DPHY6
125 */
126 int *dphy;
127 bool mipi_enabled; /* flag whether mipi is enabled already */
128 int lane; /* lane number */
129
130 /* clock tree support */
131 struct clk *clk[NR_MCAM_CLK];
132
133 /*
134 * Callbacks from the core to the platform code.
135 */
136 int (*plat_power_up) (struct mcam_camera *cam);
137 void (*plat_power_down) (struct mcam_camera *cam);
138 void (*calc_dphy) (struct mcam_camera *cam);
139 void (*ctlr_reset) (struct mcam_camera *cam);
140
141 /*
142 * Everything below here is private to the mcam core and
143 * should not be touched by the platform code.
144 */
145 struct v4l2_device v4l2_dev;
146 struct v4l2_ctrl_handler ctrl_handler;
147 enum mcam_state state;
148 unsigned long flags; /* Buffer status, mainly (dev_lock) */
149
150 struct mcam_frame_state frame_state; /* Frame state counter */
151 /*
152 * Subsystem structures.
153 */
154 struct video_device vdev;
155 struct v4l2_subdev *sensor;
156 unsigned short sensor_addr;
157
158 /* Videobuf2 stuff */
159 struct vb2_queue vb_queue;
160 struct list_head buffers; /* Available frames */
161
162 unsigned int nbufs; /* How many are alloc'd */
163 int next_buf; /* Next to consume (dev_lock) */
164
165 char bus_info[32]; /* querycap bus_info */
166
167 /* DMA buffers - vmalloc mode */
168 #ifdef MCAM_MODE_VMALLOC
169 unsigned int dma_buf_size; /* allocated size */
170 void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */
171 dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */
172 struct tasklet_struct s_tasklet;
173 #endif
174 unsigned int sequence; /* Frame sequence number */
175 unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual bufs */
176
177 /* DMA buffers - DMA modes */
178 struct mcam_vb_buffer *vb_bufs[MAX_DMA_BUFS];
179 struct vb2_alloc_ctx *vb_alloc_ctx;
180 struct vb2_alloc_ctx *vb_alloc_ctx_sg;
181
182 /* Mode-specific ops, set at open time */
183 void (*dma_setup)(struct mcam_camera *cam);
184 void (*frame_complete)(struct mcam_camera *cam, int frame);
185
186 /* Current operating parameters */
187 struct v4l2_pix_format pix_format;
188 u32 mbus_code;
189
190 /* Locks */
191 struct mutex s_mutex; /* Access to this structure */
192 };
193
194
195 /*
196 * Register I/O functions. These are here because the platform code
197 * may legitimately need to mess with the register space.
198 */
199 /*
200 * Device register I/O
201 */
mcam_reg_write(struct mcam_camera * cam,unsigned int reg,unsigned int val)202 static inline void mcam_reg_write(struct mcam_camera *cam, unsigned int reg,
203 unsigned int val)
204 {
205 iowrite32(val, cam->regs + reg);
206 }
207
mcam_reg_read(struct mcam_camera * cam,unsigned int reg)208 static inline unsigned int mcam_reg_read(struct mcam_camera *cam,
209 unsigned int reg)
210 {
211 return ioread32(cam->regs + reg);
212 }
213
214
mcam_reg_write_mask(struct mcam_camera * cam,unsigned int reg,unsigned int val,unsigned int mask)215 static inline void mcam_reg_write_mask(struct mcam_camera *cam, unsigned int reg,
216 unsigned int val, unsigned int mask)
217 {
218 unsigned int v = mcam_reg_read(cam, reg);
219
220 v = (v & ~mask) | (val & mask);
221 mcam_reg_write(cam, reg, v);
222 }
223
mcam_reg_clear_bit(struct mcam_camera * cam,unsigned int reg,unsigned int val)224 static inline void mcam_reg_clear_bit(struct mcam_camera *cam,
225 unsigned int reg, unsigned int val)
226 {
227 mcam_reg_write_mask(cam, reg, 0, val);
228 }
229
mcam_reg_set_bit(struct mcam_camera * cam,unsigned int reg,unsigned int val)230 static inline void mcam_reg_set_bit(struct mcam_camera *cam,
231 unsigned int reg, unsigned int val)
232 {
233 mcam_reg_write_mask(cam, reg, val, val);
234 }
235
236 /*
237 * Functions for use by platform code.
238 */
239 int mccic_register(struct mcam_camera *cam);
240 int mccic_irq(struct mcam_camera *cam, unsigned int irqs);
241 void mccic_shutdown(struct mcam_camera *cam);
242 #ifdef CONFIG_PM
243 void mccic_suspend(struct mcam_camera *cam);
244 int mccic_resume(struct mcam_camera *cam);
245 #endif
246
247 /*
248 * Register definitions for the m88alp01 camera interface. Offsets in bytes
249 * as given in the spec.
250 */
251 #define REG_Y0BAR 0x00
252 #define REG_Y1BAR 0x04
253 #define REG_Y2BAR 0x08
254 #define REG_U0BAR 0x0c
255 #define REG_U1BAR 0x10
256 #define REG_U2BAR 0x14
257 #define REG_V0BAR 0x18
258 #define REG_V1BAR 0x1C
259 #define REG_V2BAR 0x20
260
261 /*
262 * register definitions for MIPI support
263 */
264 #define REG_CSI2_CTRL0 0x100
265 #define CSI2_C0_MIPI_EN (0x1 << 0)
266 #define CSI2_C0_ACT_LANE(n) ((n-1) << 1)
267 #define REG_CSI2_DPHY3 0x12c
268 #define REG_CSI2_DPHY5 0x134
269 #define REG_CSI2_DPHY6 0x138
270
271 /* ... */
272
273 #define REG_IMGPITCH 0x24 /* Image pitch register */
274 #define IMGP_YP_SHFT 2 /* Y pitch params */
275 #define IMGP_YP_MASK 0x00003ffc /* Y pitch field */
276 #define IMGP_UVP_SHFT 18 /* UV pitch (planar) */
277 #define IMGP_UVP_MASK 0x3ffc0000
278 #define REG_IRQSTATRAW 0x28 /* RAW IRQ Status */
279 #define IRQ_EOF0 0x00000001 /* End of frame 0 */
280 #define IRQ_EOF1 0x00000002 /* End of frame 1 */
281 #define IRQ_EOF2 0x00000004 /* End of frame 2 */
282 #define IRQ_SOF0 0x00000008 /* Start of frame 0 */
283 #define IRQ_SOF1 0x00000010 /* Start of frame 1 */
284 #define IRQ_SOF2 0x00000020 /* Start of frame 2 */
285 #define IRQ_OVERFLOW 0x00000040 /* FIFO overflow */
286 #define IRQ_TWSIW 0x00010000 /* TWSI (smbus) write */
287 #define IRQ_TWSIR 0x00020000 /* TWSI read */
288 #define IRQ_TWSIE 0x00040000 /* TWSI error */
289 #define TWSIIRQS (IRQ_TWSIW|IRQ_TWSIR|IRQ_TWSIE)
290 #define FRAMEIRQS (IRQ_EOF0|IRQ_EOF1|IRQ_EOF2|IRQ_SOF0|IRQ_SOF1|IRQ_SOF2)
291 #define ALLIRQS (TWSIIRQS|FRAMEIRQS|IRQ_OVERFLOW)
292 #define REG_IRQMASK 0x2c /* IRQ mask - same bits as IRQSTAT */
293 #define REG_IRQSTAT 0x30 /* IRQ status / clear */
294
295 #define REG_IMGSIZE 0x34 /* Image size */
296 #define IMGSZ_V_MASK 0x1fff0000
297 #define IMGSZ_V_SHIFT 16
298 #define IMGSZ_H_MASK 0x00003fff
299 #define REG_IMGOFFSET 0x38 /* IMage offset */
300
301 #define REG_CTRL0 0x3c /* Control 0 */
302 #define C0_ENABLE 0x00000001 /* Makes the whole thing go */
303
304 /* Mask for all the format bits */
305 #define C0_DF_MASK 0x00fffffc /* Bits 2-23 */
306
307 /* RGB ordering */
308 #define C0_RGB4_RGBX 0x00000000
309 #define C0_RGB4_XRGB 0x00000004
310 #define C0_RGB4_BGRX 0x00000008
311 #define C0_RGB4_XBGR 0x0000000c
312 #define C0_RGB5_RGGB 0x00000000
313 #define C0_RGB5_GRBG 0x00000004
314 #define C0_RGB5_GBRG 0x00000008
315 #define C0_RGB5_BGGR 0x0000000c
316
317 /* Spec has two fields for DIN and DOUT, but they must match, so
318 combine them here. */
319 #define C0_DF_YUV 0x00000000 /* Data is YUV */
320 #define C0_DF_RGB 0x000000a0 /* ... RGB */
321 #define C0_DF_BAYER 0x00000140 /* ... Bayer */
322 /* 8-8-8 must be missing from the below - ask */
323 #define C0_RGBF_565 0x00000000
324 #define C0_RGBF_444 0x00000800
325 #define C0_RGB_BGR 0x00001000 /* Blue comes first */
326 #define C0_YUV_PLANAR 0x00000000 /* YUV 422 planar format */
327 #define C0_YUV_PACKED 0x00008000 /* YUV 422 packed */
328 #define C0_YUV_420PL 0x0000a000 /* YUV 420 planar */
329 /* Think that 420 packed must be 111 - ask */
330 #define C0_YUVE_YUYV 0x00000000 /* Y1CbY0Cr */
331 #define C0_YUVE_YVYU 0x00010000 /* Y1CrY0Cb */
332 #define C0_YUVE_VYUY 0x00020000 /* CrY1CbY0 */
333 #define C0_YUVE_UYVY 0x00030000 /* CbY1CrY0 */
334 #define C0_YUVE_NOSWAP 0x00000000 /* no bytes swapping */
335 #define C0_YUVE_SWAP13 0x00010000 /* swap byte 1 and 3 */
336 #define C0_YUVE_SWAP24 0x00020000 /* swap byte 2 and 4 */
337 #define C0_YUVE_SWAP1324 0x00030000 /* swap bytes 1&3 and 2&4 */
338 /* Bayer bits 18,19 if needed */
339 #define C0_EOF_VSYNC 0x00400000 /* Generate EOF by VSYNC */
340 #define C0_VEDGE_CTRL 0x00800000 /* Detect falling edge of VSYNC */
341 #define C0_HPOL_LOW 0x01000000 /* HSYNC polarity active low */
342 #define C0_VPOL_LOW 0x02000000 /* VSYNC polarity active low */
343 #define C0_VCLK_LOW 0x04000000 /* VCLK on falling edge */
344 #define C0_DOWNSCALE 0x08000000 /* Enable downscaler */
345 /* SIFMODE */
346 #define C0_SIF_HVSYNC 0x00000000 /* Use H/VSYNC */
347 #define C0_SOF_NOSYNC 0x40000000 /* Use inband active signaling */
348 #define C0_SIFM_MASK 0xc0000000 /* SIF mode bits */
349
350 /* Bits below C1_444ALPHA are not present in Cafe */
351 #define REG_CTRL1 0x40 /* Control 1 */
352 #define C1_CLKGATE 0x00000001 /* Sensor clock gate */
353 #define C1_DESC_ENA 0x00000100 /* DMA descriptor enable */
354 #define C1_DESC_3WORD 0x00000200 /* Three-word descriptors used */
355 #define C1_444ALPHA 0x00f00000 /* Alpha field in RGB444 */
356 #define C1_ALPHA_SHFT 20
357 #define C1_DMAB32 0x00000000 /* 32-byte DMA burst */
358 #define C1_DMAB16 0x02000000 /* 16-byte DMA burst */
359 #define C1_DMAB64 0x04000000 /* 64-byte DMA burst */
360 #define C1_DMAB_MASK 0x06000000
361 #define C1_TWOBUFS 0x08000000 /* Use only two DMA buffers */
362 #define C1_PWRDWN 0x10000000 /* Power down */
363
364 #define REG_CLKCTRL 0x88 /* Clock control */
365 #define CLK_DIV_MASK 0x0000ffff /* Upper bits RW "reserved" */
366
367 /* This appears to be a Cafe-only register */
368 #define REG_UBAR 0xc4 /* Upper base address register */
369
370 /* Armada 610 DMA descriptor registers */
371 #define REG_DMA_DESC_Y 0x200
372 #define REG_DMA_DESC_U 0x204
373 #define REG_DMA_DESC_V 0x208
374 #define REG_DESC_LEN_Y 0x20c /* Lengths are in bytes */
375 #define REG_DESC_LEN_U 0x210
376 #define REG_DESC_LEN_V 0x214
377
378 /*
379 * Useful stuff that probably belongs somewhere global.
380 */
381 #define VGA_WIDTH 640
382 #define VGA_HEIGHT 480
383
384 #endif /* _MCAM_CORE_H */
385