1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Microchip Image Sensor Controller (ISC) driver |
4 | * |
5 | * Copyright (C) 2016-2019 Microchip Technology, Inc. |
6 | * |
7 | * Author: Songjun Wu |
8 | * Author: Eugen Hristev <eugen.hristev@microchip.com> |
9 | * |
10 | * |
11 | * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA |
12 | * |
13 | * ISC video pipeline integrates the following submodules: |
14 | * PFE: Parallel Front End to sample the camera sensor input stream |
15 | * WB: Programmable white balance in the Bayer domain |
16 | * CFA: Color filter array interpolation module |
17 | * CC: Programmable color correction |
18 | * GAM: Gamma correction |
19 | * CSC: Programmable color space conversion |
20 | * CBC: Contrast and Brightness control |
21 | * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling |
22 | * RLP: This module performs rounding, range limiting |
23 | * and packing of the incoming data |
24 | */ |
25 | |
26 | #include <linux/clk.h> |
27 | #include <linux/clkdev.h> |
28 | #include <linux/clk-provider.h> |
29 | #include <linux/delay.h> |
30 | #include <linux/interrupt.h> |
31 | #include <linux/math64.h> |
32 | #include <linux/module.h> |
33 | #include <linux/of.h> |
34 | #include <linux/of_graph.h> |
35 | #include <linux/platform_device.h> |
36 | #include <linux/pm_runtime.h> |
37 | #include <linux/regmap.h> |
38 | #include <linux/videodev2.h> |
39 | |
40 | #include <media/v4l2-ctrls.h> |
41 | #include <media/v4l2-device.h> |
42 | #include <media/v4l2-event.h> |
43 | #include <media/v4l2-image-sizes.h> |
44 | #include <media/v4l2-ioctl.h> |
45 | #include <media/v4l2-fwnode.h> |
46 | #include <media/v4l2-subdev.h> |
47 | #include <media/videobuf2-dma-contig.h> |
48 | |
49 | #include "atmel-isc-regs.h" |
50 | #include "atmel-isc.h" |
51 | |
52 | #define ISC_SAMA5D2_MAX_SUPPORT_WIDTH 2592 |
53 | #define ISC_SAMA5D2_MAX_SUPPORT_HEIGHT 1944 |
54 | |
55 | #define ISC_SAMA5D2_PIPELINE \ |
56 | (WB_ENABLE | CFA_ENABLE | CC_ENABLE | GAM_ENABLES | CSC_ENABLE | \ |
57 | CBC_ENABLE | SUB422_ENABLE | SUB420_ENABLE) |
58 | |
59 | /* This is a list of the formats that the ISC can *output* */ |
60 | static const struct isc_format sama5d2_controller_formats[] = { |
61 | { |
62 | .fourcc = V4L2_PIX_FMT_ARGB444, |
63 | }, { |
64 | .fourcc = V4L2_PIX_FMT_ARGB555, |
65 | }, { |
66 | .fourcc = V4L2_PIX_FMT_RGB565, |
67 | }, { |
68 | .fourcc = V4L2_PIX_FMT_ABGR32, |
69 | }, { |
70 | .fourcc = V4L2_PIX_FMT_XBGR32, |
71 | }, { |
72 | .fourcc = V4L2_PIX_FMT_YUV420, |
73 | }, { |
74 | .fourcc = V4L2_PIX_FMT_YUYV, |
75 | }, { |
76 | .fourcc = V4L2_PIX_FMT_YUV422P, |
77 | }, { |
78 | .fourcc = V4L2_PIX_FMT_GREY, |
79 | }, { |
80 | .fourcc = V4L2_PIX_FMT_Y10, |
81 | }, { |
82 | .fourcc = V4L2_PIX_FMT_SBGGR8, |
83 | }, { |
84 | .fourcc = V4L2_PIX_FMT_SGBRG8, |
85 | }, { |
86 | .fourcc = V4L2_PIX_FMT_SGRBG8, |
87 | }, { |
88 | .fourcc = V4L2_PIX_FMT_SRGGB8, |
89 | }, { |
90 | .fourcc = V4L2_PIX_FMT_SBGGR10, |
91 | }, { |
92 | .fourcc = V4L2_PIX_FMT_SGBRG10, |
93 | }, { |
94 | .fourcc = V4L2_PIX_FMT_SGRBG10, |
95 | }, { |
96 | .fourcc = V4L2_PIX_FMT_SRGGB10, |
97 | }, |
98 | }; |
99 | |
100 | /* This is a list of formats that the ISC can receive as *input* */ |
101 | static struct isc_format sama5d2_formats_list[] = { |
102 | { |
103 | .fourcc = V4L2_PIX_FMT_SBGGR8, |
104 | .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, |
105 | .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, |
106 | .cfa_baycfg = ISC_BAY_CFG_BGBG, |
107 | }, |
108 | { |
109 | .fourcc = V4L2_PIX_FMT_SGBRG8, |
110 | .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8, |
111 | .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, |
112 | .cfa_baycfg = ISC_BAY_CFG_GBGB, |
113 | }, |
114 | { |
115 | .fourcc = V4L2_PIX_FMT_SGRBG8, |
116 | .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8, |
117 | .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, |
118 | .cfa_baycfg = ISC_BAY_CFG_GRGR, |
119 | }, |
120 | { |
121 | .fourcc = V4L2_PIX_FMT_SRGGB8, |
122 | .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8, |
123 | .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, |
124 | .cfa_baycfg = ISC_BAY_CFG_RGRG, |
125 | }, |
126 | { |
127 | .fourcc = V4L2_PIX_FMT_SBGGR10, |
128 | .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10, |
129 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, |
130 | .cfa_baycfg = ISC_BAY_CFG_RGRG, |
131 | }, |
132 | { |
133 | .fourcc = V4L2_PIX_FMT_SGBRG10, |
134 | .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10, |
135 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, |
136 | .cfa_baycfg = ISC_BAY_CFG_GBGB, |
137 | }, |
138 | { |
139 | .fourcc = V4L2_PIX_FMT_SGRBG10, |
140 | .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10, |
141 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, |
142 | .cfa_baycfg = ISC_BAY_CFG_GRGR, |
143 | }, |
144 | { |
145 | .fourcc = V4L2_PIX_FMT_SRGGB10, |
146 | .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10, |
147 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, |
148 | .cfa_baycfg = ISC_BAY_CFG_RGRG, |
149 | }, |
150 | { |
151 | .fourcc = V4L2_PIX_FMT_SBGGR12, |
152 | .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12, |
153 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, |
154 | .cfa_baycfg = ISC_BAY_CFG_BGBG, |
155 | }, |
156 | { |
157 | .fourcc = V4L2_PIX_FMT_SGBRG12, |
158 | .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12, |
159 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, |
160 | .cfa_baycfg = ISC_BAY_CFG_GBGB, |
161 | }, |
162 | { |
163 | .fourcc = V4L2_PIX_FMT_SGRBG12, |
164 | .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12, |
165 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, |
166 | .cfa_baycfg = ISC_BAY_CFG_GRGR, |
167 | }, |
168 | { |
169 | .fourcc = V4L2_PIX_FMT_SRGGB12, |
170 | .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12, |
171 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, |
172 | .cfa_baycfg = ISC_BAY_CFG_RGRG, |
173 | }, |
174 | { |
175 | .fourcc = V4L2_PIX_FMT_GREY, |
176 | .mbus_code = MEDIA_BUS_FMT_Y8_1X8, |
177 | .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, |
178 | }, |
179 | { |
180 | .fourcc = V4L2_PIX_FMT_YUYV, |
181 | .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, |
182 | .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, |
183 | }, |
184 | { |
185 | .fourcc = V4L2_PIX_FMT_RGB565, |
186 | .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE, |
187 | .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, |
188 | }, |
189 | { |
190 | .fourcc = V4L2_PIX_FMT_Y10, |
191 | .mbus_code = MEDIA_BUS_FMT_Y10_1X10, |
192 | .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, |
193 | }, |
194 | |
195 | }; |
196 | |
197 | static void isc_sama5d2_config_csc(struct isc_device *isc) |
198 | { |
199 | struct regmap *regmap = isc->regmap; |
200 | |
201 | /* Convert RGB to YUV */ |
202 | regmap_write(map: regmap, ISC_CSC_YR_YG + isc->offsets.csc, |
203 | val: 0x42 | (0x81 << 16)); |
204 | regmap_write(map: regmap, ISC_CSC_YB_OY + isc->offsets.csc, |
205 | val: 0x19 | (0x10 << 16)); |
206 | regmap_write(map: regmap, ISC_CSC_CBR_CBG + isc->offsets.csc, |
207 | val: 0xFDA | (0xFB6 << 16)); |
208 | regmap_write(map: regmap, ISC_CSC_CBB_OCB + isc->offsets.csc, |
209 | val: 0x70 | (0x80 << 16)); |
210 | regmap_write(map: regmap, ISC_CSC_CRR_CRG + isc->offsets.csc, |
211 | val: 0x70 | (0xFA2 << 16)); |
212 | regmap_write(map: regmap, ISC_CSC_CRB_OCR + isc->offsets.csc, |
213 | val: 0xFEE | (0x80 << 16)); |
214 | } |
215 | |
216 | static void isc_sama5d2_config_cbc(struct isc_device *isc) |
217 | { |
218 | struct regmap *regmap = isc->regmap; |
219 | |
220 | regmap_write(map: regmap, ISC_CBC_BRIGHT + isc->offsets.cbc, |
221 | val: isc->ctrls.brightness); |
222 | regmap_write(map: regmap, ISC_CBC_CONTRAST + isc->offsets.cbc, |
223 | val: isc->ctrls.contrast); |
224 | } |
225 | |
226 | static void isc_sama5d2_config_cc(struct isc_device *isc) |
227 | { |
228 | struct regmap *regmap = isc->regmap; |
229 | |
230 | /* Configure each register at the neutral fixed point 1.0 or 0.0 */ |
231 | regmap_write(map: regmap, ISC_CC_RR_RG, val: (1 << 8)); |
232 | regmap_write(map: regmap, ISC_CC_RB_OR, val: 0); |
233 | regmap_write(map: regmap, ISC_CC_GR_GG, val: (1 << 8) << 16); |
234 | regmap_write(map: regmap, ISC_CC_GB_OG, val: 0); |
235 | regmap_write(map: regmap, ISC_CC_BR_BG, val: 0); |
236 | regmap_write(map: regmap, ISC_CC_BB_OB, val: (1 << 8)); |
237 | } |
238 | |
239 | static void isc_sama5d2_config_ctrls(struct isc_device *isc, |
240 | const struct v4l2_ctrl_ops *ops) |
241 | { |
242 | struct isc_ctrls *ctrls = &isc->ctrls; |
243 | struct v4l2_ctrl_handler *hdl = &ctrls->handler; |
244 | |
245 | ctrls->contrast = 256; |
246 | |
247 | v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, min: -2048, max: 2047, step: 1, def: 256); |
248 | } |
249 | |
250 | static void isc_sama5d2_config_dpc(struct isc_device *isc) |
251 | { |
252 | /* This module is not present on sama5d2 pipeline */ |
253 | } |
254 | |
255 | static void isc_sama5d2_config_gam(struct isc_device *isc) |
256 | { |
257 | /* No specific gamma configuration */ |
258 | } |
259 | |
260 | static void isc_sama5d2_config_rlp(struct isc_device *isc) |
261 | { |
262 | struct regmap *regmap = isc->regmap; |
263 | u32 rlp_mode = isc->config.rlp_cfg_mode; |
264 | |
265 | /* |
266 | * In sama5d2, the YUV planar modes and the YUYV modes are treated |
267 | * in the same way in RLP register. |
268 | * Normally, YYCC mode should be Luma(n) - Color B(n) - Color R (n) |
269 | * and YCYC should be Luma(n + 1) - Color B (n) - Luma (n) - Color R (n) |
270 | * but in sama5d2, the YCYC mode does not exist, and YYCC must be |
271 | * selected for both planar and interleaved modes, as in fact |
272 | * both modes are supported. |
273 | * |
274 | * Thus, if the YCYC mode is selected, replace it with the |
275 | * sama5d2-compliant mode which is YYCC . |
276 | */ |
277 | if ((rlp_mode & ISC_RLP_CFG_MODE_MASK) == ISC_RLP_CFG_MODE_YCYC) { |
278 | rlp_mode &= ~ISC_RLP_CFG_MODE_MASK; |
279 | rlp_mode |= ISC_RLP_CFG_MODE_YYCC; |
280 | } |
281 | |
282 | regmap_update_bits(map: regmap, ISC_RLP_CFG + isc->offsets.rlp, |
283 | ISC_RLP_CFG_MODE_MASK, val: rlp_mode); |
284 | } |
285 | |
286 | static void isc_sama5d2_adapt_pipeline(struct isc_device *isc) |
287 | { |
288 | isc->try_config.bits_pipeline &= ISC_SAMA5D2_PIPELINE; |
289 | } |
290 | |
291 | /* Gamma table with gamma 1/2.2 */ |
292 | static const u32 isc_sama5d2_gamma_table[][GAMMA_ENTRIES] = { |
293 | /* 0 --> gamma 1/1.8 */ |
294 | { 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A, |
295 | 0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012, |
296 | 0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F, |
297 | 0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E, |
298 | 0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C, |
299 | 0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B, |
300 | 0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A, |
301 | 0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A, |
302 | 0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A, |
303 | 0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009, |
304 | 0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 }, |
305 | |
306 | /* 1 --> gamma 1/2 */ |
307 | { 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B, |
308 | 0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013, |
309 | 0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F, |
310 | 0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D, |
311 | 0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B, |
312 | 0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A, |
313 | 0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A, |
314 | 0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009, |
315 | 0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009, |
316 | 0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009, |
317 | 0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 }, |
318 | |
319 | /* 2 --> gamma 1/2.2 */ |
320 | { 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B, |
321 | 0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012, |
322 | 0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F, |
323 | 0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C, |
324 | 0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B, |
325 | 0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A, |
326 | 0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009, |
327 | 0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009, |
328 | 0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008, |
329 | 0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007, |
330 | 0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 }, |
331 | }; |
332 | |
333 | static int isc_parse_dt(struct device *dev, struct isc_device *isc) |
334 | { |
335 | struct device_node *np = dev->of_node; |
336 | struct device_node *epn = NULL; |
337 | struct isc_subdev_entity *subdev_entity; |
338 | unsigned int flags; |
339 | int ret; |
340 | |
341 | INIT_LIST_HEAD(list: &isc->subdev_entities); |
342 | |
343 | while (1) { |
344 | struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 }; |
345 | |
346 | epn = of_graph_get_next_endpoint(parent: np, previous: epn); |
347 | if (!epn) |
348 | return 0; |
349 | |
350 | ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn), |
351 | vep: &v4l2_epn); |
352 | if (ret) { |
353 | ret = -EINVAL; |
354 | dev_err(dev, "Could not parse the endpoint\n" ); |
355 | break; |
356 | } |
357 | |
358 | subdev_entity = devm_kzalloc(dev, size: sizeof(*subdev_entity), |
359 | GFP_KERNEL); |
360 | if (!subdev_entity) { |
361 | ret = -ENOMEM; |
362 | break; |
363 | } |
364 | subdev_entity->epn = epn; |
365 | |
366 | flags = v4l2_epn.bus.parallel.flags; |
367 | |
368 | if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) |
369 | subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW; |
370 | |
371 | if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) |
372 | subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW; |
373 | |
374 | if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) |
375 | subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW; |
376 | |
377 | if (v4l2_epn.bus_type == V4L2_MBUS_BT656) |
378 | subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC | |
379 | ISC_PFE_CFG0_CCIR656; |
380 | |
381 | list_add_tail(new: &subdev_entity->list, head: &isc->subdev_entities); |
382 | } |
383 | of_node_put(node: epn); |
384 | |
385 | return ret; |
386 | } |
387 | |
388 | static int atmel_isc_probe(struct platform_device *pdev) |
389 | { |
390 | struct device *dev = &pdev->dev; |
391 | struct isc_device *isc; |
392 | void __iomem *io_base; |
393 | struct isc_subdev_entity *subdev_entity; |
394 | int irq; |
395 | int ret; |
396 | u32 ver; |
397 | |
398 | isc = devm_kzalloc(dev, size: sizeof(*isc), GFP_KERNEL); |
399 | if (!isc) |
400 | return -ENOMEM; |
401 | |
402 | platform_set_drvdata(pdev, data: isc); |
403 | isc->dev = dev; |
404 | |
405 | io_base = devm_platform_ioremap_resource(pdev, index: 0); |
406 | if (IS_ERR(ptr: io_base)) |
407 | return PTR_ERR(ptr: io_base); |
408 | |
409 | isc->regmap = devm_regmap_init_mmio(dev, io_base, &atmel_isc_regmap_config); |
410 | if (IS_ERR(ptr: isc->regmap)) { |
411 | ret = PTR_ERR(ptr: isc->regmap); |
412 | dev_err(dev, "failed to init register map: %d\n" , ret); |
413 | return ret; |
414 | } |
415 | |
416 | irq = platform_get_irq(pdev, 0); |
417 | if (irq < 0) |
418 | return irq; |
419 | |
420 | ret = devm_request_irq(dev, irq, handler: atmel_isc_interrupt, irqflags: 0, |
421 | devname: "atmel-sama5d2-isc" , dev_id: isc); |
422 | if (ret < 0) { |
423 | dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n" , |
424 | irq, ret); |
425 | return ret; |
426 | } |
427 | |
428 | isc->gamma_table = isc_sama5d2_gamma_table; |
429 | isc->gamma_max = 2; |
430 | |
431 | isc->max_width = ISC_SAMA5D2_MAX_SUPPORT_WIDTH; |
432 | isc->max_height = ISC_SAMA5D2_MAX_SUPPORT_HEIGHT; |
433 | |
434 | isc->config_dpc = isc_sama5d2_config_dpc; |
435 | isc->config_csc = isc_sama5d2_config_csc; |
436 | isc->config_cbc = isc_sama5d2_config_cbc; |
437 | isc->config_cc = isc_sama5d2_config_cc; |
438 | isc->config_gam = isc_sama5d2_config_gam; |
439 | isc->config_rlp = isc_sama5d2_config_rlp; |
440 | isc->config_ctrls = isc_sama5d2_config_ctrls; |
441 | |
442 | isc->adapt_pipeline = isc_sama5d2_adapt_pipeline; |
443 | |
444 | isc->offsets.csc = ISC_SAMA5D2_CSC_OFFSET; |
445 | isc->offsets.cbc = ISC_SAMA5D2_CBC_OFFSET; |
446 | isc->offsets.sub422 = ISC_SAMA5D2_SUB422_OFFSET; |
447 | isc->offsets.sub420 = ISC_SAMA5D2_SUB420_OFFSET; |
448 | isc->offsets.rlp = ISC_SAMA5D2_RLP_OFFSET; |
449 | isc->offsets.his = ISC_SAMA5D2_HIS_OFFSET; |
450 | isc->offsets.dma = ISC_SAMA5D2_DMA_OFFSET; |
451 | isc->offsets.version = ISC_SAMA5D2_VERSION_OFFSET; |
452 | isc->offsets.his_entry = ISC_SAMA5D2_HIS_ENTRY_OFFSET; |
453 | |
454 | isc->controller_formats = sama5d2_controller_formats; |
455 | isc->controller_formats_size = ARRAY_SIZE(sama5d2_controller_formats); |
456 | isc->formats_list = sama5d2_formats_list; |
457 | isc->formats_list_size = ARRAY_SIZE(sama5d2_formats_list); |
458 | |
459 | /* sama5d2-isc - 8 bits per beat */ |
460 | isc->dcfg = ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8; |
461 | |
462 | /* sama5d2-isc : ISPCK is required and mandatory */ |
463 | isc->ispck_required = true; |
464 | |
465 | ret = atmel_isc_pipeline_init(isc); |
466 | if (ret) |
467 | return ret; |
468 | |
469 | isc->hclock = devm_clk_get(dev, id: "hclock" ); |
470 | if (IS_ERR(ptr: isc->hclock)) { |
471 | ret = PTR_ERR(ptr: isc->hclock); |
472 | dev_err(dev, "failed to get hclock: %d\n" , ret); |
473 | return ret; |
474 | } |
475 | |
476 | ret = clk_prepare_enable(clk: isc->hclock); |
477 | if (ret) { |
478 | dev_err(dev, "failed to enable hclock: %d\n" , ret); |
479 | return ret; |
480 | } |
481 | |
482 | ret = atmel_isc_clk_init(isc); |
483 | if (ret) { |
484 | dev_err(dev, "failed to init isc clock: %d\n" , ret); |
485 | goto unprepare_hclk; |
486 | } |
487 | ret = v4l2_device_register(dev, v4l2_dev: &isc->v4l2_dev); |
488 | if (ret) { |
489 | dev_err(dev, "unable to register v4l2 device.\n" ); |
490 | goto unprepare_clk; |
491 | } |
492 | |
493 | ret = isc_parse_dt(dev, isc); |
494 | if (ret) { |
495 | dev_err(dev, "fail to parse device tree\n" ); |
496 | goto unregister_v4l2_device; |
497 | } |
498 | |
499 | if (list_empty(head: &isc->subdev_entities)) { |
500 | dev_err(dev, "no subdev found\n" ); |
501 | ret = -ENODEV; |
502 | goto unregister_v4l2_device; |
503 | } |
504 | |
505 | list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { |
506 | struct v4l2_async_connection *asd; |
507 | struct fwnode_handle *fwnode = |
508 | of_fwnode_handle(subdev_entity->epn); |
509 | |
510 | v4l2_async_nf_init(notifier: &subdev_entity->notifier, v4l2_dev: &isc->v4l2_dev); |
511 | |
512 | asd = v4l2_async_nf_add_fwnode_remote(&subdev_entity->notifier, |
513 | fwnode, |
514 | struct v4l2_async_connection); |
515 | |
516 | of_node_put(node: subdev_entity->epn); |
517 | subdev_entity->epn = NULL; |
518 | |
519 | if (IS_ERR(ptr: asd)) { |
520 | ret = PTR_ERR(ptr: asd); |
521 | goto cleanup_subdev; |
522 | } |
523 | |
524 | subdev_entity->notifier.ops = &atmel_isc_async_ops; |
525 | |
526 | ret = v4l2_async_nf_register(notifier: &subdev_entity->notifier); |
527 | if (ret) { |
528 | dev_err(dev, "fail to register async notifier\n" ); |
529 | goto cleanup_subdev; |
530 | } |
531 | |
532 | if (video_is_registered(vdev: &isc->video_dev)) |
533 | break; |
534 | } |
535 | |
536 | pm_runtime_set_active(dev); |
537 | pm_runtime_enable(dev); |
538 | pm_request_idle(dev); |
539 | |
540 | isc->ispck = isc->isc_clks[ISC_ISPCK].clk; |
541 | |
542 | ret = clk_prepare_enable(clk: isc->ispck); |
543 | if (ret) { |
544 | dev_err(dev, "failed to enable ispck: %d\n" , ret); |
545 | goto disable_pm; |
546 | } |
547 | |
548 | /* ispck should be greater or equal to hclock */ |
549 | ret = clk_set_rate(clk: isc->ispck, rate: clk_get_rate(clk: isc->hclock)); |
550 | if (ret) { |
551 | dev_err(dev, "failed to set ispck rate: %d\n" , ret); |
552 | goto unprepare_clk; |
553 | } |
554 | |
555 | regmap_read(map: isc->regmap, ISC_VERSION + isc->offsets.version, val: &ver); |
556 | dev_info(dev, "Microchip ISC version %x\n" , ver); |
557 | |
558 | return 0; |
559 | |
560 | unprepare_clk: |
561 | clk_disable_unprepare(clk: isc->ispck); |
562 | |
563 | disable_pm: |
564 | pm_runtime_disable(dev); |
565 | |
566 | cleanup_subdev: |
567 | atmel_isc_subdev_cleanup(isc); |
568 | |
569 | unregister_v4l2_device: |
570 | v4l2_device_unregister(v4l2_dev: &isc->v4l2_dev); |
571 | |
572 | unprepare_hclk: |
573 | clk_disable_unprepare(clk: isc->hclock); |
574 | |
575 | atmel_isc_clk_cleanup(isc); |
576 | |
577 | return ret; |
578 | } |
579 | |
580 | static void atmel_isc_remove(struct platform_device *pdev) |
581 | { |
582 | struct isc_device *isc = platform_get_drvdata(pdev); |
583 | |
584 | pm_runtime_disable(dev: &pdev->dev); |
585 | |
586 | atmel_isc_subdev_cleanup(isc); |
587 | |
588 | v4l2_device_unregister(v4l2_dev: &isc->v4l2_dev); |
589 | |
590 | clk_disable_unprepare(clk: isc->ispck); |
591 | clk_disable_unprepare(clk: isc->hclock); |
592 | |
593 | atmel_isc_clk_cleanup(isc); |
594 | } |
595 | |
596 | static int __maybe_unused isc_runtime_suspend(struct device *dev) |
597 | { |
598 | struct isc_device *isc = dev_get_drvdata(dev); |
599 | |
600 | clk_disable_unprepare(clk: isc->ispck); |
601 | clk_disable_unprepare(clk: isc->hclock); |
602 | |
603 | return 0; |
604 | } |
605 | |
606 | static int __maybe_unused isc_runtime_resume(struct device *dev) |
607 | { |
608 | struct isc_device *isc = dev_get_drvdata(dev); |
609 | int ret; |
610 | |
611 | ret = clk_prepare_enable(clk: isc->hclock); |
612 | if (ret) |
613 | return ret; |
614 | |
615 | ret = clk_prepare_enable(clk: isc->ispck); |
616 | if (ret) |
617 | clk_disable_unprepare(clk: isc->hclock); |
618 | |
619 | return ret; |
620 | } |
621 | |
622 | static const struct dev_pm_ops atmel_isc_dev_pm_ops = { |
623 | SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL) |
624 | }; |
625 | |
626 | #if IS_ENABLED(CONFIG_OF) |
627 | static const struct of_device_id atmel_isc_of_match[] = { |
628 | { .compatible = "atmel,sama5d2-isc" }, |
629 | { } |
630 | }; |
631 | MODULE_DEVICE_TABLE(of, atmel_isc_of_match); |
632 | #endif |
633 | |
634 | static struct platform_driver atmel_isc_driver = { |
635 | .probe = atmel_isc_probe, |
636 | .remove_new = atmel_isc_remove, |
637 | .driver = { |
638 | .name = "atmel-sama5d2-isc" , |
639 | .pm = &atmel_isc_dev_pm_ops, |
640 | .of_match_table = of_match_ptr(atmel_isc_of_match), |
641 | }, |
642 | }; |
643 | |
644 | module_platform_driver(atmel_isc_driver); |
645 | |
646 | MODULE_AUTHOR("Songjun Wu" ); |
647 | MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC" ); |
648 | MODULE_LICENSE("GPL v2" ); |
649 | |