1 /*
2 * ispcsi2.c
3 *
4 * TI OMAP3 ISP - CSI2 module
5 *
6 * Copyright (C) 2010 Nokia Corporation
7 * Copyright (C) 2009 Texas Instruments, Inc.
8 *
9 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 * Sakari Ailus <sakari.ailus@iki.fi>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16 #include <linux/delay.h>
17 #include <media/v4l2-common.h>
18 #include <linux/v4l2-mediabus.h>
19 #include <linux/mm.h>
20
21 #include "isp.h"
22 #include "ispreg.h"
23 #include "ispcsi2.h"
24
25 /*
26 * csi2_if_enable - Enable CSI2 Receiver interface.
27 * @enable: enable flag
28 *
29 */
csi2_if_enable(struct isp_device * isp,struct isp_csi2_device * csi2,u8 enable)30 static void csi2_if_enable(struct isp_device *isp,
31 struct isp_csi2_device *csi2, u8 enable)
32 {
33 struct isp_csi2_ctrl_cfg *currctrl = &csi2->ctrl;
34
35 isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_CTRL, ISPCSI2_CTRL_IF_EN,
36 enable ? ISPCSI2_CTRL_IF_EN : 0);
37
38 currctrl->if_enable = enable;
39 }
40
41 /*
42 * csi2_recv_config - CSI2 receiver module configuration.
43 * @currctrl: isp_csi2_ctrl_cfg structure
44 *
45 */
csi2_recv_config(struct isp_device * isp,struct isp_csi2_device * csi2,struct isp_csi2_ctrl_cfg * currctrl)46 static void csi2_recv_config(struct isp_device *isp,
47 struct isp_csi2_device *csi2,
48 struct isp_csi2_ctrl_cfg *currctrl)
49 {
50 u32 reg;
51
52 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTRL);
53
54 if (currctrl->frame_mode)
55 reg |= ISPCSI2_CTRL_FRAME;
56 else
57 reg &= ~ISPCSI2_CTRL_FRAME;
58
59 if (currctrl->vp_clk_enable)
60 reg |= ISPCSI2_CTRL_VP_CLK_EN;
61 else
62 reg &= ~ISPCSI2_CTRL_VP_CLK_EN;
63
64 if (currctrl->vp_only_enable)
65 reg |= ISPCSI2_CTRL_VP_ONLY_EN;
66 else
67 reg &= ~ISPCSI2_CTRL_VP_ONLY_EN;
68
69 reg &= ~ISPCSI2_CTRL_VP_OUT_CTRL_MASK;
70 reg |= currctrl->vp_out_ctrl << ISPCSI2_CTRL_VP_OUT_CTRL_SHIFT;
71
72 if (currctrl->ecc_enable)
73 reg |= ISPCSI2_CTRL_ECC_EN;
74 else
75 reg &= ~ISPCSI2_CTRL_ECC_EN;
76
77 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTRL);
78 }
79
80 static const unsigned int csi2_input_fmts[] = {
81 V4L2_MBUS_FMT_SGRBG10_1X10,
82 V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
83 V4L2_MBUS_FMT_SRGGB10_1X10,
84 V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8,
85 V4L2_MBUS_FMT_SBGGR10_1X10,
86 V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8,
87 V4L2_MBUS_FMT_SGBRG10_1X10,
88 V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8,
89 V4L2_MBUS_FMT_YUYV8_2X8,
90 };
91
92 /* To set the format on the CSI2 requires a mapping function that takes
93 * the following inputs:
94 * - 3 different formats (at this time)
95 * - 2 destinations (mem, vp+mem) (vp only handled separately)
96 * - 2 decompression options (on, off)
97 * - 2 isp revisions (certain format must be handled differently on OMAP3630)
98 * Output should be CSI2 frame format code
99 * Array indices as follows: [format][dest][decompr][is_3630]
100 * Not all combinations are valid. 0 means invalid.
101 */
102 static const u16 __csi2_fmt_map[3][2][2][2] = {
103 /* RAW10 formats */
104 {
105 /* Output to memory */
106 {
107 /* No DPCM decompression */
108 { CSI2_PIX_FMT_RAW10_EXP16, CSI2_PIX_FMT_RAW10_EXP16 },
109 /* DPCM decompression */
110 { 0, 0 },
111 },
112 /* Output to both */
113 {
114 /* No DPCM decompression */
115 { CSI2_PIX_FMT_RAW10_EXP16_VP,
116 CSI2_PIX_FMT_RAW10_EXP16_VP },
117 /* DPCM decompression */
118 { 0, 0 },
119 },
120 },
121 /* RAW10 DPCM8 formats */
122 {
123 /* Output to memory */
124 {
125 /* No DPCM decompression */
126 { CSI2_PIX_FMT_RAW8, CSI2_USERDEF_8BIT_DATA1 },
127 /* DPCM decompression */
128 { CSI2_PIX_FMT_RAW8_DPCM10_EXP16,
129 CSI2_USERDEF_8BIT_DATA1_DPCM10 },
130 },
131 /* Output to both */
132 {
133 /* No DPCM decompression */
134 { CSI2_PIX_FMT_RAW8_VP,
135 CSI2_PIX_FMT_RAW8_VP },
136 /* DPCM decompression */
137 { CSI2_PIX_FMT_RAW8_DPCM10_VP,
138 CSI2_USERDEF_8BIT_DATA1_DPCM10_VP },
139 },
140 },
141 /* YUYV8 2X8 formats */
142 {
143 /* Output to memory */
144 {
145 /* No DPCM decompression */
146 { CSI2_PIX_FMT_YUV422_8BIT,
147 CSI2_PIX_FMT_YUV422_8BIT },
148 /* DPCM decompression */
149 { 0, 0 },
150 },
151 /* Output to both */
152 {
153 /* No DPCM decompression */
154 { CSI2_PIX_FMT_YUV422_8BIT_VP,
155 CSI2_PIX_FMT_YUV422_8BIT_VP },
156 /* DPCM decompression */
157 { 0, 0 },
158 },
159 },
160 };
161
162 /*
163 * csi2_ctx_map_format - Map CSI2 sink media bus format to CSI2 format ID
164 * @csi2: ISP CSI2 device
165 *
166 * Returns CSI2 physical format id
167 */
csi2_ctx_map_format(struct isp_csi2_device * csi2)168 static u16 csi2_ctx_map_format(struct isp_csi2_device *csi2)
169 {
170 const struct v4l2_mbus_framefmt *fmt = &csi2->formats[CSI2_PAD_SINK];
171 int fmtidx, destidx, is_3630;
172
173 switch (fmt->code) {
174 case V4L2_MBUS_FMT_SGRBG10_1X10:
175 case V4L2_MBUS_FMT_SRGGB10_1X10:
176 case V4L2_MBUS_FMT_SBGGR10_1X10:
177 case V4L2_MBUS_FMT_SGBRG10_1X10:
178 fmtidx = 0;
179 break;
180 case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
181 case V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8:
182 case V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8:
183 case V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8:
184 fmtidx = 1;
185 break;
186 case V4L2_MBUS_FMT_YUYV8_2X8:
187 fmtidx = 2;
188 break;
189 default:
190 WARN(1, KERN_ERR "CSI2: pixel format %08x unsupported!\n",
191 fmt->code);
192 return 0;
193 }
194
195 if (!(csi2->output & CSI2_OUTPUT_CCDC) &&
196 !(csi2->output & CSI2_OUTPUT_MEMORY)) {
197 /* Neither output enabled is a valid combination */
198 return CSI2_PIX_FMT_OTHERS;
199 }
200
201 /* If we need to skip frames at the beginning of the stream disable the
202 * video port to avoid sending the skipped frames to the CCDC.
203 */
204 destidx = csi2->frame_skip ? 0 : !!(csi2->output & CSI2_OUTPUT_CCDC);
205 is_3630 = csi2->isp->revision == ISP_REVISION_15_0;
206
207 return __csi2_fmt_map[fmtidx][destidx][csi2->dpcm_decompress][is_3630];
208 }
209
210 /*
211 * csi2_set_outaddr - Set memory address to save output image
212 * @csi2: Pointer to ISP CSI2a device.
213 * @addr: ISP MMU Mapped 32-bit memory address aligned on 32 byte boundary.
214 *
215 * Sets the memory address where the output will be saved.
216 *
217 * Returns 0 if successful, or -EINVAL if the address is not in the 32 byte
218 * boundary.
219 */
csi2_set_outaddr(struct isp_csi2_device * csi2,u32 addr)220 static void csi2_set_outaddr(struct isp_csi2_device *csi2, u32 addr)
221 {
222 struct isp_device *isp = csi2->isp;
223 struct isp_csi2_ctx_cfg *ctx = &csi2->contexts[0];
224
225 ctx->ping_addr = addr;
226 ctx->pong_addr = addr;
227 isp_reg_writel(isp, ctx->ping_addr,
228 csi2->regs1, ISPCSI2_CTX_DAT_PING_ADDR(ctx->ctxnum));
229 isp_reg_writel(isp, ctx->pong_addr,
230 csi2->regs1, ISPCSI2_CTX_DAT_PONG_ADDR(ctx->ctxnum));
231 }
232
233 /*
234 * is_usr_def_mapping - Checks whether USER_DEF_MAPPING should
235 * be enabled by CSI2.
236 * @format_id: mapped format id
237 *
238 */
is_usr_def_mapping(u32 format_id)239 static inline int is_usr_def_mapping(u32 format_id)
240 {
241 return (format_id & 0x40) ? 1 : 0;
242 }
243
244 /*
245 * csi2_ctx_enable - Enable specified CSI2 context
246 * @ctxnum: Context number, valid between 0 and 7 values.
247 * @enable: enable
248 *
249 */
csi2_ctx_enable(struct isp_device * isp,struct isp_csi2_device * csi2,u8 ctxnum,u8 enable)250 static void csi2_ctx_enable(struct isp_device *isp,
251 struct isp_csi2_device *csi2, u8 ctxnum, u8 enable)
252 {
253 struct isp_csi2_ctx_cfg *ctx = &csi2->contexts[ctxnum];
254 unsigned int skip = 0;
255 u32 reg;
256
257 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL1(ctxnum));
258
259 if (enable) {
260 if (csi2->frame_skip)
261 skip = csi2->frame_skip;
262 else if (csi2->output & CSI2_OUTPUT_MEMORY)
263 skip = 1;
264
265 reg &= ~ISPCSI2_CTX_CTRL1_COUNT_MASK;
266 reg |= ISPCSI2_CTX_CTRL1_COUNT_UNLOCK
267 | (skip << ISPCSI2_CTX_CTRL1_COUNT_SHIFT)
268 | ISPCSI2_CTX_CTRL1_CTX_EN;
269 } else {
270 reg &= ~ISPCSI2_CTX_CTRL1_CTX_EN;
271 }
272
273 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL1(ctxnum));
274 ctx->enabled = enable;
275 }
276
277 /*
278 * csi2_ctx_config - CSI2 context configuration.
279 * @ctx: context configuration
280 *
281 */
csi2_ctx_config(struct isp_device * isp,struct isp_csi2_device * csi2,struct isp_csi2_ctx_cfg * ctx)282 static void csi2_ctx_config(struct isp_device *isp,
283 struct isp_csi2_device *csi2,
284 struct isp_csi2_ctx_cfg *ctx)
285 {
286 u32 reg;
287
288 /* Set up CSI2_CTx_CTRL1 */
289 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL1(ctx->ctxnum));
290
291 if (ctx->eof_enabled)
292 reg |= ISPCSI2_CTX_CTRL1_EOF_EN;
293 else
294 reg &= ~ISPCSI2_CTX_CTRL1_EOF_EN;
295
296 if (ctx->eol_enabled)
297 reg |= ISPCSI2_CTX_CTRL1_EOL_EN;
298 else
299 reg &= ~ISPCSI2_CTX_CTRL1_EOL_EN;
300
301 if (ctx->checksum_enabled)
302 reg |= ISPCSI2_CTX_CTRL1_CS_EN;
303 else
304 reg &= ~ISPCSI2_CTX_CTRL1_CS_EN;
305
306 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL1(ctx->ctxnum));
307
308 /* Set up CSI2_CTx_CTRL2 */
309 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL2(ctx->ctxnum));
310
311 reg &= ~(ISPCSI2_CTX_CTRL2_VIRTUAL_ID_MASK);
312 reg |= ctx->virtual_id << ISPCSI2_CTX_CTRL2_VIRTUAL_ID_SHIFT;
313
314 reg &= ~(ISPCSI2_CTX_CTRL2_FORMAT_MASK);
315 reg |= ctx->format_id << ISPCSI2_CTX_CTRL2_FORMAT_SHIFT;
316
317 if (ctx->dpcm_decompress) {
318 if (ctx->dpcm_predictor)
319 reg |= ISPCSI2_CTX_CTRL2_DPCM_PRED;
320 else
321 reg &= ~ISPCSI2_CTX_CTRL2_DPCM_PRED;
322 }
323
324 if (is_usr_def_mapping(ctx->format_id)) {
325 reg &= ~ISPCSI2_CTX_CTRL2_USER_DEF_MAP_MASK;
326 reg |= 2 << ISPCSI2_CTX_CTRL2_USER_DEF_MAP_SHIFT;
327 }
328
329 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL2(ctx->ctxnum));
330
331 /* Set up CSI2_CTx_CTRL3 */
332 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL3(ctx->ctxnum));
333 reg &= ~(ISPCSI2_CTX_CTRL3_ALPHA_MASK);
334 reg |= (ctx->alpha << ISPCSI2_CTX_CTRL3_ALPHA_SHIFT);
335
336 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL3(ctx->ctxnum));
337
338 /* Set up CSI2_CTx_DAT_OFST */
339 reg = isp_reg_readl(isp, csi2->regs1,
340 ISPCSI2_CTX_DAT_OFST(ctx->ctxnum));
341 reg &= ~ISPCSI2_CTX_DAT_OFST_OFST_MASK;
342 reg |= ctx->data_offset << ISPCSI2_CTX_DAT_OFST_OFST_SHIFT;
343 isp_reg_writel(isp, reg, csi2->regs1,
344 ISPCSI2_CTX_DAT_OFST(ctx->ctxnum));
345
346 isp_reg_writel(isp, ctx->ping_addr,
347 csi2->regs1, ISPCSI2_CTX_DAT_PING_ADDR(ctx->ctxnum));
348
349 isp_reg_writel(isp, ctx->pong_addr,
350 csi2->regs1, ISPCSI2_CTX_DAT_PONG_ADDR(ctx->ctxnum));
351 }
352
353 /*
354 * csi2_timing_config - CSI2 timing configuration.
355 * @timing: csi2_timing_cfg structure
356 */
csi2_timing_config(struct isp_device * isp,struct isp_csi2_device * csi2,struct isp_csi2_timing_cfg * timing)357 static void csi2_timing_config(struct isp_device *isp,
358 struct isp_csi2_device *csi2,
359 struct isp_csi2_timing_cfg *timing)
360 {
361 u32 reg;
362
363 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_TIMING);
364
365 if (timing->force_rx_mode)
366 reg |= ISPCSI2_TIMING_FORCE_RX_MODE_IO(timing->ionum);
367 else
368 reg &= ~ISPCSI2_TIMING_FORCE_RX_MODE_IO(timing->ionum);
369
370 if (timing->stop_state_16x)
371 reg |= ISPCSI2_TIMING_STOP_STATE_X16_IO(timing->ionum);
372 else
373 reg &= ~ISPCSI2_TIMING_STOP_STATE_X16_IO(timing->ionum);
374
375 if (timing->stop_state_4x)
376 reg |= ISPCSI2_TIMING_STOP_STATE_X4_IO(timing->ionum);
377 else
378 reg &= ~ISPCSI2_TIMING_STOP_STATE_X4_IO(timing->ionum);
379
380 reg &= ~ISPCSI2_TIMING_STOP_STATE_COUNTER_IO_MASK(timing->ionum);
381 reg |= timing->stop_state_counter <<
382 ISPCSI2_TIMING_STOP_STATE_COUNTER_IO_SHIFT(timing->ionum);
383
384 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_TIMING);
385 }
386
387 /*
388 * csi2_irq_ctx_set - Enables CSI2 Context IRQs.
389 * @enable: Enable/disable CSI2 Context interrupts
390 */
csi2_irq_ctx_set(struct isp_device * isp,struct isp_csi2_device * csi2,int enable)391 static void csi2_irq_ctx_set(struct isp_device *isp,
392 struct isp_csi2_device *csi2, int enable)
393 {
394 int i;
395
396 for (i = 0; i < 8; i++) {
397 isp_reg_writel(isp, ISPCSI2_CTX_IRQSTATUS_FE_IRQ, csi2->regs1,
398 ISPCSI2_CTX_IRQSTATUS(i));
399 if (enable)
400 isp_reg_set(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
401 ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
402 else
403 isp_reg_clr(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
404 ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
405 }
406 }
407
408 /*
409 * csi2_irq_complexio1_set - Enables CSI2 ComplexIO IRQs.
410 * @enable: Enable/disable CSI2 ComplexIO #1 interrupts
411 */
csi2_irq_complexio1_set(struct isp_device * isp,struct isp_csi2_device * csi2,int enable)412 static void csi2_irq_complexio1_set(struct isp_device *isp,
413 struct isp_csi2_device *csi2, int enable)
414 {
415 u32 reg;
416 reg = ISPCSI2_PHY_IRQENABLE_STATEALLULPMEXIT |
417 ISPCSI2_PHY_IRQENABLE_STATEALLULPMENTER |
418 ISPCSI2_PHY_IRQENABLE_STATEULPM5 |
419 ISPCSI2_PHY_IRQENABLE_ERRCONTROL5 |
420 ISPCSI2_PHY_IRQENABLE_ERRESC5 |
421 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS5 |
422 ISPCSI2_PHY_IRQENABLE_ERRSOTHS5 |
423 ISPCSI2_PHY_IRQENABLE_STATEULPM4 |
424 ISPCSI2_PHY_IRQENABLE_ERRCONTROL4 |
425 ISPCSI2_PHY_IRQENABLE_ERRESC4 |
426 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS4 |
427 ISPCSI2_PHY_IRQENABLE_ERRSOTHS4 |
428 ISPCSI2_PHY_IRQENABLE_STATEULPM3 |
429 ISPCSI2_PHY_IRQENABLE_ERRCONTROL3 |
430 ISPCSI2_PHY_IRQENABLE_ERRESC3 |
431 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS3 |
432 ISPCSI2_PHY_IRQENABLE_ERRSOTHS3 |
433 ISPCSI2_PHY_IRQENABLE_STATEULPM2 |
434 ISPCSI2_PHY_IRQENABLE_ERRCONTROL2 |
435 ISPCSI2_PHY_IRQENABLE_ERRESC2 |
436 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS2 |
437 ISPCSI2_PHY_IRQENABLE_ERRSOTHS2 |
438 ISPCSI2_PHY_IRQENABLE_STATEULPM1 |
439 ISPCSI2_PHY_IRQENABLE_ERRCONTROL1 |
440 ISPCSI2_PHY_IRQENABLE_ERRESC1 |
441 ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS1 |
442 ISPCSI2_PHY_IRQENABLE_ERRSOTHS1;
443 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_PHY_IRQSTATUS);
444 if (enable)
445 reg |= isp_reg_readl(isp, csi2->regs1, ISPCSI2_PHY_IRQENABLE);
446 else
447 reg = 0;
448 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_PHY_IRQENABLE);
449 }
450
451 /*
452 * csi2_irq_status_set - Enables CSI2 Status IRQs.
453 * @enable: Enable/disable CSI2 Status interrupts
454 */
csi2_irq_status_set(struct isp_device * isp,struct isp_csi2_device * csi2,int enable)455 static void csi2_irq_status_set(struct isp_device *isp,
456 struct isp_csi2_device *csi2, int enable)
457 {
458 u32 reg;
459 reg = ISPCSI2_IRQSTATUS_OCP_ERR_IRQ |
460 ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ |
461 ISPCSI2_IRQSTATUS_ECC_CORRECTION_IRQ |
462 ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ |
463 ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ |
464 ISPCSI2_IRQSTATUS_COMPLEXIO1_ERR_IRQ |
465 ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ |
466 ISPCSI2_IRQSTATUS_CONTEXT(0);
467 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_IRQSTATUS);
468 if (enable)
469 reg |= isp_reg_readl(isp, csi2->regs1, ISPCSI2_IRQENABLE);
470 else
471 reg = 0;
472
473 isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_IRQENABLE);
474 }
475
476 /*
477 * omap3isp_csi2_reset - Resets the CSI2 module.
478 *
479 * Must be called with the phy lock held.
480 *
481 * Returns 0 if successful, or -EBUSY if power command didn't respond.
482 */
omap3isp_csi2_reset(struct isp_csi2_device * csi2)483 int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
484 {
485 struct isp_device *isp = csi2->isp;
486 u8 soft_reset_retries = 0;
487 u32 reg;
488 int i;
489
490 if (!csi2->available)
491 return -ENODEV;
492
493 if (csi2->phy->phy_in_use)
494 return -EBUSY;
495
496 isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
497 ISPCSI2_SYSCONFIG_SOFT_RESET);
498
499 do {
500 reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_SYSSTATUS) &
501 ISPCSI2_SYSSTATUS_RESET_DONE;
502 if (reg == ISPCSI2_SYSSTATUS_RESET_DONE)
503 break;
504 soft_reset_retries++;
505 if (soft_reset_retries < 5)
506 udelay(100);
507 } while (soft_reset_retries < 5);
508
509 if (soft_reset_retries == 5) {
510 dev_err(isp->dev, "CSI2: Soft reset try count exceeded!\n");
511 return -EBUSY;
512 }
513
514 if (isp->revision == ISP_REVISION_15_0)
515 isp_reg_set(isp, csi2->regs1, ISPCSI2_PHY_CFG,
516 ISPCSI2_PHY_CFG_RESET_CTRL);
517
518 i = 100;
519 do {
520 reg = isp_reg_readl(isp, csi2->phy->phy_regs, ISPCSIPHY_REG1)
521 & ISPCSIPHY_REG1_RESET_DONE_CTRLCLK;
522 if (reg == ISPCSIPHY_REG1_RESET_DONE_CTRLCLK)
523 break;
524 udelay(100);
525 } while (--i > 0);
526
527 if (i == 0) {
528 dev_err(isp->dev,
529 "CSI2: Reset for CSI2_96M_FCLK domain Failed!\n");
530 return -EBUSY;
531 }
532
533 if (isp->autoidle)
534 isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
535 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
536 ISPCSI2_SYSCONFIG_AUTO_IDLE,
537 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_SMART |
538 ((isp->revision == ISP_REVISION_15_0) ?
539 ISPCSI2_SYSCONFIG_AUTO_IDLE : 0));
540 else
541 isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
542 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
543 ISPCSI2_SYSCONFIG_AUTO_IDLE,
544 ISPCSI2_SYSCONFIG_MSTANDBY_MODE_NO);
545
546 return 0;
547 }
548
csi2_configure(struct isp_csi2_device * csi2)549 static int csi2_configure(struct isp_csi2_device *csi2)
550 {
551 const struct isp_v4l2_subdevs_group *pdata;
552 struct isp_device *isp = csi2->isp;
553 struct isp_csi2_timing_cfg *timing = &csi2->timing[0];
554 struct v4l2_subdev *sensor;
555 struct media_pad *pad;
556
557 /*
558 * CSI2 fields that can be updated while the context has
559 * been enabled or the interface has been enabled are not
560 * updated dynamically currently. So we do not allow to
561 * reconfigure if either has been enabled
562 */
563 if (csi2->contexts[0].enabled || csi2->ctrl.if_enable)
564 return -EBUSY;
565
566 pad = media_entity_remote_pad(&csi2->pads[CSI2_PAD_SINK]);
567 sensor = media_entity_to_v4l2_subdev(pad->entity);
568 pdata = sensor->host_priv;
569
570 csi2->frame_skip = 0;
571 v4l2_subdev_call(sensor, sensor, g_skip_frames, &csi2->frame_skip);
572
573 csi2->ctrl.vp_out_ctrl = pdata->bus.csi2.vpclk_div;
574 csi2->ctrl.frame_mode = ISP_CSI2_FRAME_IMMEDIATE;
575 csi2->ctrl.ecc_enable = pdata->bus.csi2.crc;
576
577 timing->ionum = 1;
578 timing->force_rx_mode = 1;
579 timing->stop_state_16x = 1;
580 timing->stop_state_4x = 1;
581 timing->stop_state_counter = 0x1FF;
582
583 /*
584 * The CSI2 receiver can't do any format conversion except DPCM
585 * decompression, so every set_format call configures both pads
586 * and enables DPCM decompression as a special case:
587 */
588 if (csi2->formats[CSI2_PAD_SINK].code !=
589 csi2->formats[CSI2_PAD_SOURCE].code)
590 csi2->dpcm_decompress = true;
591 else
592 csi2->dpcm_decompress = false;
593
594 csi2->contexts[0].format_id = csi2_ctx_map_format(csi2);
595
596 if (csi2->video_out.bpl_padding == 0)
597 csi2->contexts[0].data_offset = 0;
598 else
599 csi2->contexts[0].data_offset = csi2->video_out.bpl_value;
600
601 /*
602 * Enable end of frame and end of line signals generation for
603 * context 0. These signals are generated from CSI2 receiver to
604 * qualify the last pixel of a frame and the last pixel of a line.
605 * Without enabling the signals CSI2 receiver writes data to memory
606 * beyond buffer size and/or data line offset is not handled correctly.
607 */
608 csi2->contexts[0].eof_enabled = 1;
609 csi2->contexts[0].eol_enabled = 1;
610
611 csi2_irq_complexio1_set(isp, csi2, 1);
612 csi2_irq_ctx_set(isp, csi2, 1);
613 csi2_irq_status_set(isp, csi2, 1);
614
615 /* Set configuration (timings, format and links) */
616 csi2_timing_config(isp, csi2, timing);
617 csi2_recv_config(isp, csi2, &csi2->ctrl);
618 csi2_ctx_config(isp, csi2, &csi2->contexts[0]);
619
620 return 0;
621 }
622
623 /*
624 * csi2_print_status - Prints CSI2 debug information.
625 */
626 #define CSI2_PRINT_REGISTER(isp, regs, name)\
627 dev_dbg(isp->dev, "###CSI2 " #name "=0x%08x\n", \
628 isp_reg_readl(isp, regs, ISPCSI2_##name))
629
csi2_print_status(struct isp_csi2_device * csi2)630 static void csi2_print_status(struct isp_csi2_device *csi2)
631 {
632 struct isp_device *isp = csi2->isp;
633
634 if (!csi2->available)
635 return;
636
637 dev_dbg(isp->dev, "-------------CSI2 Register dump-------------\n");
638
639 CSI2_PRINT_REGISTER(isp, csi2->regs1, SYSCONFIG);
640 CSI2_PRINT_REGISTER(isp, csi2->regs1, SYSSTATUS);
641 CSI2_PRINT_REGISTER(isp, csi2->regs1, IRQENABLE);
642 CSI2_PRINT_REGISTER(isp, csi2->regs1, IRQSTATUS);
643 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTRL);
644 CSI2_PRINT_REGISTER(isp, csi2->regs1, DBG_H);
645 CSI2_PRINT_REGISTER(isp, csi2->regs1, GNQ);
646 CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_CFG);
647 CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_IRQSTATUS);
648 CSI2_PRINT_REGISTER(isp, csi2->regs1, SHORT_PACKET);
649 CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_IRQENABLE);
650 CSI2_PRINT_REGISTER(isp, csi2->regs1, DBG_P);
651 CSI2_PRINT_REGISTER(isp, csi2->regs1, TIMING);
652 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL1(0));
653 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL2(0));
654 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_OFST(0));
655 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_PING_ADDR(0));
656 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_PONG_ADDR(0));
657 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_IRQENABLE(0));
658 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_IRQSTATUS(0));
659 CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL3(0));
660
661 dev_dbg(isp->dev, "--------------------------------------------\n");
662 }
663
664 /* -----------------------------------------------------------------------------
665 * Interrupt handling
666 */
667
668 /*
669 * csi2_isr_buffer - Does buffer handling at end-of-frame
670 * when writing to memory.
671 */
csi2_isr_buffer(struct isp_csi2_device * csi2)672 static void csi2_isr_buffer(struct isp_csi2_device *csi2)
673 {
674 struct isp_device *isp = csi2->isp;
675 struct isp_buffer *buffer;
676
677 csi2_ctx_enable(isp, csi2, 0, 0);
678
679 buffer = omap3isp_video_buffer_next(&csi2->video_out);
680
681 /*
682 * Let video queue operation restart engine if there is an underrun
683 * condition.
684 */
685 if (buffer == NULL)
686 return;
687
688 csi2_set_outaddr(csi2, buffer->dma);
689 csi2_ctx_enable(isp, csi2, 0, 1);
690 }
691
csi2_isr_ctx(struct isp_csi2_device * csi2,struct isp_csi2_ctx_cfg * ctx)692 static void csi2_isr_ctx(struct isp_csi2_device *csi2,
693 struct isp_csi2_ctx_cfg *ctx)
694 {
695 struct isp_device *isp = csi2->isp;
696 unsigned int n = ctx->ctxnum;
697 u32 status;
698
699 status = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
700 isp_reg_writel(isp, status, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
701
702 if (!(status & ISPCSI2_CTX_IRQSTATUS_FE_IRQ))
703 return;
704
705 /* Skip interrupts until we reach the frame skip count. The CSI2 will be
706 * automatically disabled, as the frame skip count has been programmed
707 * in the CSI2_CTx_CTRL1::COUNT field, so reenable it.
708 *
709 * It would have been nice to rely on the FRAME_NUMBER interrupt instead
710 * but it turned out that the interrupt is only generated when the CSI2
711 * writes to memory (the CSI2_CTx_CTRL1::COUNT field is decreased
712 * correctly and reaches 0 when data is forwarded to the video port only
713 * but no interrupt arrives). Maybe a CSI2 hardware bug.
714 */
715 if (csi2->frame_skip) {
716 csi2->frame_skip--;
717 if (csi2->frame_skip == 0) {
718 ctx->format_id = csi2_ctx_map_format(csi2);
719 csi2_ctx_config(isp, csi2, ctx);
720 csi2_ctx_enable(isp, csi2, n, 1);
721 }
722 return;
723 }
724
725 if (csi2->output & CSI2_OUTPUT_MEMORY)
726 csi2_isr_buffer(csi2);
727 }
728
729 /*
730 * omap3isp_csi2_isr - CSI2 interrupt handling.
731 */
omap3isp_csi2_isr(struct isp_csi2_device * csi2)732 void omap3isp_csi2_isr(struct isp_csi2_device *csi2)
733 {
734 struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
735 u32 csi2_irqstatus, cpxio1_irqstatus;
736 struct isp_device *isp = csi2->isp;
737
738 if (!csi2->available)
739 return;
740
741 csi2_irqstatus = isp_reg_readl(isp, csi2->regs1, ISPCSI2_IRQSTATUS);
742 isp_reg_writel(isp, csi2_irqstatus, csi2->regs1, ISPCSI2_IRQSTATUS);
743
744 /* Failure Cases */
745 if (csi2_irqstatus & ISPCSI2_IRQSTATUS_COMPLEXIO1_ERR_IRQ) {
746 cpxio1_irqstatus = isp_reg_readl(isp, csi2->regs1,
747 ISPCSI2_PHY_IRQSTATUS);
748 isp_reg_writel(isp, cpxio1_irqstatus,
749 csi2->regs1, ISPCSI2_PHY_IRQSTATUS);
750 dev_dbg(isp->dev, "CSI2: ComplexIO Error IRQ "
751 "%x\n", cpxio1_irqstatus);
752 pipe->error = true;
753 }
754
755 if (csi2_irqstatus & (ISPCSI2_IRQSTATUS_OCP_ERR_IRQ |
756 ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ |
757 ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ |
758 ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ |
759 ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ)) {
760 dev_dbg(isp->dev, "CSI2 Err:"
761 " OCP:%d,"
762 " Short_pack:%d,"
763 " ECC:%d,"
764 " CPXIO2:%d,"
765 " FIFO_OVF:%d,"
766 "\n",
767 (csi2_irqstatus &
768 ISPCSI2_IRQSTATUS_OCP_ERR_IRQ) ? 1 : 0,
769 (csi2_irqstatus &
770 ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ) ? 1 : 0,
771 (csi2_irqstatus &
772 ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ) ? 1 : 0,
773 (csi2_irqstatus &
774 ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ) ? 1 : 0,
775 (csi2_irqstatus &
776 ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ) ? 1 : 0);
777 pipe->error = true;
778 }
779
780 if (omap3isp_module_sync_is_stopping(&csi2->wait, &csi2->stopping))
781 return;
782
783 /* Successful cases */
784 if (csi2_irqstatus & ISPCSI2_IRQSTATUS_CONTEXT(0))
785 csi2_isr_ctx(csi2, &csi2->contexts[0]);
786
787 if (csi2_irqstatus & ISPCSI2_IRQSTATUS_ECC_CORRECTION_IRQ)
788 dev_dbg(isp->dev, "CSI2: ECC correction done\n");
789 }
790
791 /* -----------------------------------------------------------------------------
792 * ISP video operations
793 */
794
795 /*
796 * csi2_queue - Queues the first buffer when using memory output
797 * @video: The video node
798 * @buffer: buffer to queue
799 */
csi2_queue(struct isp_video * video,struct isp_buffer * buffer)800 static int csi2_queue(struct isp_video *video, struct isp_buffer *buffer)
801 {
802 struct isp_device *isp = video->isp;
803 struct isp_csi2_device *csi2 = &isp->isp_csi2a;
804
805 csi2_set_outaddr(csi2, buffer->dma);
806
807 /*
808 * If streaming was enabled before there was a buffer queued
809 * or underrun happened in the ISR, the hardware was not enabled
810 * and DMA queue flag ISP_VIDEO_DMAQUEUE_UNDERRUN is still set.
811 * Enable it now.
812 */
813 if (csi2->video_out.dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) {
814 /* Enable / disable context 0 and IRQs */
815 csi2_if_enable(isp, csi2, 1);
816 csi2_ctx_enable(isp, csi2, 0, 1);
817 isp_video_dmaqueue_flags_clr(&csi2->video_out);
818 }
819
820 return 0;
821 }
822
823 static const struct isp_video_operations csi2_ispvideo_ops = {
824 .queue = csi2_queue,
825 };
826
827 /* -----------------------------------------------------------------------------
828 * V4L2 subdev operations
829 */
830
831 static struct v4l2_mbus_framefmt *
__csi2_get_format(struct isp_csi2_device * csi2,struct v4l2_subdev_fh * fh,unsigned int pad,enum v4l2_subdev_format_whence which)832 __csi2_get_format(struct isp_csi2_device *csi2, struct v4l2_subdev_fh *fh,
833 unsigned int pad, enum v4l2_subdev_format_whence which)
834 {
835 if (which == V4L2_SUBDEV_FORMAT_TRY)
836 return v4l2_subdev_get_try_format(fh, pad);
837 else
838 return &csi2->formats[pad];
839 }
840
841 static void
csi2_try_format(struct isp_csi2_device * csi2,struct v4l2_subdev_fh * fh,unsigned int pad,struct v4l2_mbus_framefmt * fmt,enum v4l2_subdev_format_whence which)842 csi2_try_format(struct isp_csi2_device *csi2, struct v4l2_subdev_fh *fh,
843 unsigned int pad, struct v4l2_mbus_framefmt *fmt,
844 enum v4l2_subdev_format_whence which)
845 {
846 enum v4l2_mbus_pixelcode pixelcode;
847 struct v4l2_mbus_framefmt *format;
848 const struct isp_format_info *info;
849 unsigned int i;
850
851 switch (pad) {
852 case CSI2_PAD_SINK:
853 /* Clamp the width and height to valid range (1-8191). */
854 for (i = 0; i < ARRAY_SIZE(csi2_input_fmts); i++) {
855 if (fmt->code == csi2_input_fmts[i])
856 break;
857 }
858
859 /* If not found, use SGRBG10 as default */
860 if (i >= ARRAY_SIZE(csi2_input_fmts))
861 fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;
862
863 fmt->width = clamp_t(u32, fmt->width, 1, 8191);
864 fmt->height = clamp_t(u32, fmt->height, 1, 8191);
865 break;
866
867 case CSI2_PAD_SOURCE:
868 /* Source format same as sink format, except for DPCM
869 * compression.
870 */
871 pixelcode = fmt->code;
872 format = __csi2_get_format(csi2, fh, CSI2_PAD_SINK, which);
873 memcpy(fmt, format, sizeof(*fmt));
874
875 /*
876 * Only Allow DPCM decompression, and check that the
877 * pattern is preserved
878 */
879 info = omap3isp_video_format_info(fmt->code);
880 if (info->uncompressed == pixelcode)
881 fmt->code = pixelcode;
882 break;
883 }
884
885 /* RGB, non-interlaced */
886 fmt->colorspace = V4L2_COLORSPACE_SRGB;
887 fmt->field = V4L2_FIELD_NONE;
888 }
889
890 /*
891 * csi2_enum_mbus_code - Handle pixel format enumeration
892 * @sd : pointer to v4l2 subdev structure
893 * @fh : V4L2 subdev file handle
894 * @code : pointer to v4l2_subdev_mbus_code_enum structure
895 * return -EINVAL or zero on success
896 */
csi2_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh,struct v4l2_subdev_mbus_code_enum * code)897 static int csi2_enum_mbus_code(struct v4l2_subdev *sd,
898 struct v4l2_subdev_fh *fh,
899 struct v4l2_subdev_mbus_code_enum *code)
900 {
901 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
902 struct v4l2_mbus_framefmt *format;
903 const struct isp_format_info *info;
904
905 if (code->pad == CSI2_PAD_SINK) {
906 if (code->index >= ARRAY_SIZE(csi2_input_fmts))
907 return -EINVAL;
908
909 code->code = csi2_input_fmts[code->index];
910 } else {
911 format = __csi2_get_format(csi2, fh, CSI2_PAD_SINK,
912 V4L2_SUBDEV_FORMAT_TRY);
913 switch (code->index) {
914 case 0:
915 /* Passthrough sink pad code */
916 code->code = format->code;
917 break;
918 case 1:
919 /* Uncompressed code */
920 info = omap3isp_video_format_info(format->code);
921 if (info->uncompressed == format->code)
922 return -EINVAL;
923
924 code->code = info->uncompressed;
925 break;
926 default:
927 return -EINVAL;
928 }
929 }
930
931 return 0;
932 }
933
csi2_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh,struct v4l2_subdev_frame_size_enum * fse)934 static int csi2_enum_frame_size(struct v4l2_subdev *sd,
935 struct v4l2_subdev_fh *fh,
936 struct v4l2_subdev_frame_size_enum *fse)
937 {
938 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
939 struct v4l2_mbus_framefmt format;
940
941 if (fse->index != 0)
942 return -EINVAL;
943
944 format.code = fse->code;
945 format.width = 1;
946 format.height = 1;
947 csi2_try_format(csi2, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
948 fse->min_width = format.width;
949 fse->min_height = format.height;
950
951 if (format.code != fse->code)
952 return -EINVAL;
953
954 format.code = fse->code;
955 format.width = -1;
956 format.height = -1;
957 csi2_try_format(csi2, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
958 fse->max_width = format.width;
959 fse->max_height = format.height;
960
961 return 0;
962 }
963
964 /*
965 * csi2_get_format - Handle get format by pads subdev method
966 * @sd : pointer to v4l2 subdev structure
967 * @fh : V4L2 subdev file handle
968 * @fmt: pointer to v4l2 subdev format structure
969 * return -EINVAL or zero on success
970 */
csi2_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh,struct v4l2_subdev_format * fmt)971 static int csi2_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
972 struct v4l2_subdev_format *fmt)
973 {
974 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
975 struct v4l2_mbus_framefmt *format;
976
977 format = __csi2_get_format(csi2, fh, fmt->pad, fmt->which);
978 if (format == NULL)
979 return -EINVAL;
980
981 fmt->format = *format;
982 return 0;
983 }
984
985 /*
986 * csi2_set_format - Handle set format by pads subdev method
987 * @sd : pointer to v4l2 subdev structure
988 * @fh : V4L2 subdev file handle
989 * @fmt: pointer to v4l2 subdev format structure
990 * return -EINVAL or zero on success
991 */
csi2_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh,struct v4l2_subdev_format * fmt)992 static int csi2_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
993 struct v4l2_subdev_format *fmt)
994 {
995 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
996 struct v4l2_mbus_framefmt *format;
997
998 format = __csi2_get_format(csi2, fh, fmt->pad, fmt->which);
999 if (format == NULL)
1000 return -EINVAL;
1001
1002 csi2_try_format(csi2, fh, fmt->pad, &fmt->format, fmt->which);
1003 *format = fmt->format;
1004
1005 /* Propagate the format from sink to source */
1006 if (fmt->pad == CSI2_PAD_SINK) {
1007 format = __csi2_get_format(csi2, fh, CSI2_PAD_SOURCE,
1008 fmt->which);
1009 *format = fmt->format;
1010 csi2_try_format(csi2, fh, CSI2_PAD_SOURCE, format, fmt->which);
1011 }
1012
1013 return 0;
1014 }
1015
1016 /*
1017 * csi2_init_formats - Initialize formats on all pads
1018 * @sd: ISP CSI2 V4L2 subdevice
1019 * @fh: V4L2 subdev file handle
1020 *
1021 * Initialize all pad formats with default values. If fh is not NULL, try
1022 * formats are initialized on the file handle. Otherwise active formats are
1023 * initialized on the device.
1024 */
csi2_init_formats(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)1025 static int csi2_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1026 {
1027 struct v4l2_subdev_format format;
1028
1029 memset(&format, 0, sizeof(format));
1030 format.pad = CSI2_PAD_SINK;
1031 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
1032 format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
1033 format.format.width = 4096;
1034 format.format.height = 4096;
1035 csi2_set_format(sd, fh, &format);
1036
1037 return 0;
1038 }
1039
1040 /*
1041 * csi2_set_stream - Enable/Disable streaming on the CSI2 module
1042 * @sd: ISP CSI2 V4L2 subdevice
1043 * @enable: ISP pipeline stream state
1044 *
1045 * Return 0 on success or a negative error code otherwise.
1046 */
csi2_set_stream(struct v4l2_subdev * sd,int enable)1047 static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
1048 {
1049 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
1050 struct isp_device *isp = csi2->isp;
1051 struct isp_video *video_out = &csi2->video_out;
1052
1053 switch (enable) {
1054 case ISP_PIPELINE_STREAM_CONTINUOUS:
1055 if (omap3isp_csiphy_acquire(csi2->phy) < 0)
1056 return -ENODEV;
1057 if (csi2->output & CSI2_OUTPUT_MEMORY)
1058 omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
1059 csi2_configure(csi2);
1060 csi2_print_status(csi2);
1061
1062 /*
1063 * When outputting to memory with no buffer available, let the
1064 * buffer queue handler start the hardware. A DMA queue flag
1065 * ISP_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
1066 * a buffer available.
1067 */
1068 if (csi2->output & CSI2_OUTPUT_MEMORY &&
1069 !(video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED))
1070 break;
1071 /* Enable context 0 and IRQs */
1072 atomic_set(&csi2->stopping, 0);
1073 csi2_ctx_enable(isp, csi2, 0, 1);
1074 csi2_if_enable(isp, csi2, 1);
1075 isp_video_dmaqueue_flags_clr(video_out);
1076 break;
1077
1078 case ISP_PIPELINE_STREAM_STOPPED:
1079 if (csi2->state == ISP_PIPELINE_STREAM_STOPPED)
1080 return 0;
1081 if (omap3isp_module_sync_idle(&sd->entity, &csi2->wait,
1082 &csi2->stopping))
1083 dev_dbg(isp->dev, "%s: module stop timeout.\n",
1084 sd->name);
1085 csi2_ctx_enable(isp, csi2, 0, 0);
1086 csi2_if_enable(isp, csi2, 0);
1087 csi2_irq_ctx_set(isp, csi2, 0);
1088 omap3isp_csiphy_release(csi2->phy);
1089 isp_video_dmaqueue_flags_clr(video_out);
1090 omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
1091 break;
1092 }
1093
1094 csi2->state = enable;
1095 return 0;
1096 }
1097
1098 /* subdev video operations */
1099 static const struct v4l2_subdev_video_ops csi2_video_ops = {
1100 .s_stream = csi2_set_stream,
1101 };
1102
1103 /* subdev pad operations */
1104 static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
1105 .enum_mbus_code = csi2_enum_mbus_code,
1106 .enum_frame_size = csi2_enum_frame_size,
1107 .get_fmt = csi2_get_format,
1108 .set_fmt = csi2_set_format,
1109 };
1110
1111 /* subdev operations */
1112 static const struct v4l2_subdev_ops csi2_ops = {
1113 .video = &csi2_video_ops,
1114 .pad = &csi2_pad_ops,
1115 };
1116
1117 /* subdev internal operations */
1118 static const struct v4l2_subdev_internal_ops csi2_internal_ops = {
1119 .open = csi2_init_formats,
1120 };
1121
1122 /* -----------------------------------------------------------------------------
1123 * Media entity operations
1124 */
1125
1126 /*
1127 * csi2_link_setup - Setup CSI2 connections.
1128 * @entity : Pointer to media entity structure
1129 * @local : Pointer to local pad array
1130 * @remote : Pointer to remote pad array
1131 * @flags : Link flags
1132 * return -EINVAL or zero on success
1133 */
csi2_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)1134 static int csi2_link_setup(struct media_entity *entity,
1135 const struct media_pad *local,
1136 const struct media_pad *remote, u32 flags)
1137 {
1138 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1139 struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
1140 struct isp_csi2_ctrl_cfg *ctrl = &csi2->ctrl;
1141
1142 /*
1143 * The ISP core doesn't support pipelines with multiple video outputs.
1144 * Revisit this when it will be implemented, and return -EBUSY for now.
1145 */
1146
1147 switch (local->index | media_entity_type(remote->entity)) {
1148 case CSI2_PAD_SOURCE | MEDIA_ENT_T_DEVNODE:
1149 if (flags & MEDIA_LNK_FL_ENABLED) {
1150 if (csi2->output & ~CSI2_OUTPUT_MEMORY)
1151 return -EBUSY;
1152 csi2->output |= CSI2_OUTPUT_MEMORY;
1153 } else {
1154 csi2->output &= ~CSI2_OUTPUT_MEMORY;
1155 }
1156 break;
1157
1158 case CSI2_PAD_SOURCE | MEDIA_ENT_T_V4L2_SUBDEV:
1159 if (flags & MEDIA_LNK_FL_ENABLED) {
1160 if (csi2->output & ~CSI2_OUTPUT_CCDC)
1161 return -EBUSY;
1162 csi2->output |= CSI2_OUTPUT_CCDC;
1163 } else {
1164 csi2->output &= ~CSI2_OUTPUT_CCDC;
1165 }
1166 break;
1167
1168 default:
1169 /* Link from camera to CSI2 is fixed... */
1170 return -EINVAL;
1171 }
1172
1173 ctrl->vp_only_enable =
1174 (csi2->output & CSI2_OUTPUT_MEMORY) ? false : true;
1175 ctrl->vp_clk_enable = !!(csi2->output & CSI2_OUTPUT_CCDC);
1176
1177 return 0;
1178 }
1179
1180 /* media operations */
1181 static const struct media_entity_operations csi2_media_ops = {
1182 .link_setup = csi2_link_setup,
1183 .link_validate = v4l2_subdev_link_validate,
1184 };
1185
omap3isp_csi2_unregister_entities(struct isp_csi2_device * csi2)1186 void omap3isp_csi2_unregister_entities(struct isp_csi2_device *csi2)
1187 {
1188 v4l2_device_unregister_subdev(&csi2->subdev);
1189 omap3isp_video_unregister(&csi2->video_out);
1190 }
1191
omap3isp_csi2_register_entities(struct isp_csi2_device * csi2,struct v4l2_device * vdev)1192 int omap3isp_csi2_register_entities(struct isp_csi2_device *csi2,
1193 struct v4l2_device *vdev)
1194 {
1195 int ret;
1196
1197 /* Register the subdev and video nodes. */
1198 ret = v4l2_device_register_subdev(vdev, &csi2->subdev);
1199 if (ret < 0)
1200 goto error;
1201
1202 ret = omap3isp_video_register(&csi2->video_out, vdev);
1203 if (ret < 0)
1204 goto error;
1205
1206 return 0;
1207
1208 error:
1209 omap3isp_csi2_unregister_entities(csi2);
1210 return ret;
1211 }
1212
1213 /* -----------------------------------------------------------------------------
1214 * ISP CSI2 initialisation and cleanup
1215 */
1216
1217 /*
1218 * csi2_init_entities - Initialize subdev and media entity.
1219 * @csi2: Pointer to csi2 structure.
1220 * return -ENOMEM or zero on success
1221 */
csi2_init_entities(struct isp_csi2_device * csi2)1222 static int csi2_init_entities(struct isp_csi2_device *csi2)
1223 {
1224 struct v4l2_subdev *sd = &csi2->subdev;
1225 struct media_pad *pads = csi2->pads;
1226 struct media_entity *me = &sd->entity;
1227 int ret;
1228
1229 v4l2_subdev_init(sd, &csi2_ops);
1230 sd->internal_ops = &csi2_internal_ops;
1231 strlcpy(sd->name, "OMAP3 ISP CSI2a", sizeof(sd->name));
1232
1233 sd->grp_id = 1 << 16; /* group ID for isp subdevs */
1234 v4l2_set_subdevdata(sd, csi2);
1235 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1236
1237 pads[CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
1238 pads[CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK
1239 | MEDIA_PAD_FL_MUST_CONNECT;
1240
1241 me->ops = &csi2_media_ops;
1242 ret = media_entity_init(me, CSI2_PADS_NUM, pads, 0);
1243 if (ret < 0)
1244 return ret;
1245
1246 csi2_init_formats(sd, NULL);
1247
1248 /* Video device node */
1249 csi2->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1250 csi2->video_out.ops = &csi2_ispvideo_ops;
1251 csi2->video_out.bpl_alignment = 32;
1252 csi2->video_out.bpl_zero_padding = 1;
1253 csi2->video_out.bpl_max = 0x1ffe0;
1254 csi2->video_out.isp = csi2->isp;
1255 csi2->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
1256
1257 ret = omap3isp_video_init(&csi2->video_out, "CSI2a");
1258 if (ret < 0)
1259 goto error_video;
1260
1261 /* Connect the CSI2 subdev to the video node. */
1262 ret = media_entity_create_link(&csi2->subdev.entity, CSI2_PAD_SOURCE,
1263 &csi2->video_out.video.entity, 0, 0);
1264 if (ret < 0)
1265 goto error_link;
1266
1267 return 0;
1268
1269 error_link:
1270 omap3isp_video_cleanup(&csi2->video_out);
1271 error_video:
1272 media_entity_cleanup(&csi2->subdev.entity);
1273 return ret;
1274 }
1275
1276 /*
1277 * omap3isp_csi2_init - Routine for module driver init
1278 */
omap3isp_csi2_init(struct isp_device * isp)1279 int omap3isp_csi2_init(struct isp_device *isp)
1280 {
1281 struct isp_csi2_device *csi2a = &isp->isp_csi2a;
1282 struct isp_csi2_device *csi2c = &isp->isp_csi2c;
1283 int ret;
1284
1285 csi2a->isp = isp;
1286 csi2a->available = 1;
1287 csi2a->regs1 = OMAP3_ISP_IOMEM_CSI2A_REGS1;
1288 csi2a->regs2 = OMAP3_ISP_IOMEM_CSI2A_REGS2;
1289 csi2a->phy = &isp->isp_csiphy2;
1290 csi2a->state = ISP_PIPELINE_STREAM_STOPPED;
1291 init_waitqueue_head(&csi2a->wait);
1292
1293 ret = csi2_init_entities(csi2a);
1294 if (ret < 0)
1295 return ret;
1296
1297 if (isp->revision == ISP_REVISION_15_0) {
1298 csi2c->isp = isp;
1299 csi2c->available = 1;
1300 csi2c->regs1 = OMAP3_ISP_IOMEM_CSI2C_REGS1;
1301 csi2c->regs2 = OMAP3_ISP_IOMEM_CSI2C_REGS2;
1302 csi2c->phy = &isp->isp_csiphy1;
1303 csi2c->state = ISP_PIPELINE_STREAM_STOPPED;
1304 init_waitqueue_head(&csi2c->wait);
1305 }
1306
1307 return 0;
1308 }
1309
1310 /*
1311 * omap3isp_csi2_cleanup - Routine for module driver cleanup
1312 */
omap3isp_csi2_cleanup(struct isp_device * isp)1313 void omap3isp_csi2_cleanup(struct isp_device *isp)
1314 {
1315 struct isp_csi2_device *csi2a = &isp->isp_csi2a;
1316
1317 omap3isp_video_cleanup(&csi2a->video_out);
1318 media_entity_cleanup(&csi2a->subdev.entity);
1319 }
1320