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2066930d BS |
1 | /* |
2 | * V4L2 Driver for i.MX27/i.MX25 camera host | |
3 | * | |
4 | * Copyright (C) 2008, Sascha Hauer, Pengutronix | |
5 | * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/io.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/fs.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/time.h> | |
26 | #include <linux/version.h> | |
27 | #include <linux/device.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/mutex.h> | |
30 | #include <linux/clk.h> | |
31 | ||
32 | #include <media/v4l2-common.h> | |
33 | #include <media/v4l2-dev.h> | |
34 | #include <media/videobuf-dma-contig.h> | |
35 | #include <media/soc_camera.h> | |
36 | #include <media/soc_mediabus.h> | |
37 | ||
38 | #include <linux/videodev2.h> | |
39 | ||
40 | #include <mach/mx2_cam.h> | |
41 | #ifdef CONFIG_MACH_MX27 | |
42 | #include <mach/dma-mx1-mx2.h> | |
43 | #endif | |
44 | #include <mach/hardware.h> | |
45 | ||
46 | #include <asm/dma.h> | |
47 | ||
48 | #define MX2_CAM_DRV_NAME "mx2-camera" | |
49 | #define MX2_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5) | |
50 | #define MX2_CAM_DRIVER_DESCRIPTION "i.MX2x_Camera" | |
51 | ||
52 | /* reset values */ | |
53 | #define CSICR1_RESET_VAL 0x40000800 | |
54 | #define CSICR2_RESET_VAL 0x0 | |
55 | #define CSICR3_RESET_VAL 0x0 | |
56 | ||
57 | /* csi control reg 1 */ | |
58 | #define CSICR1_SWAP16_EN (1 << 31) | |
59 | #define CSICR1_EXT_VSYNC (1 << 30) | |
60 | #define CSICR1_EOF_INTEN (1 << 29) | |
61 | #define CSICR1_PRP_IF_EN (1 << 28) | |
62 | #define CSICR1_CCIR_MODE (1 << 27) | |
63 | #define CSICR1_COF_INTEN (1 << 26) | |
64 | #define CSICR1_SF_OR_INTEN (1 << 25) | |
65 | #define CSICR1_RF_OR_INTEN (1 << 24) | |
66 | #define CSICR1_STATFF_LEVEL (3 << 22) | |
67 | #define CSICR1_STATFF_INTEN (1 << 21) | |
68 | #define CSICR1_RXFF_LEVEL(l) (((l) & 3) << 19) /* MX27 */ | |
69 | #define CSICR1_FB2_DMA_INTEN (1 << 20) /* MX25 */ | |
70 | #define CSICR1_FB1_DMA_INTEN (1 << 19) /* MX25 */ | |
71 | #define CSICR1_RXFF_INTEN (1 << 18) | |
72 | #define CSICR1_SOF_POL (1 << 17) | |
73 | #define CSICR1_SOF_INTEN (1 << 16) | |
74 | #define CSICR1_MCLKDIV(d) (((d) & 0xF) << 12) | |
75 | #define CSICR1_HSYNC_POL (1 << 11) | |
76 | #define CSICR1_CCIR_EN (1 << 10) | |
77 | #define CSICR1_MCLKEN (1 << 9) | |
78 | #define CSICR1_FCC (1 << 8) | |
79 | #define CSICR1_PACK_DIR (1 << 7) | |
80 | #define CSICR1_CLR_STATFIFO (1 << 6) | |
81 | #define CSICR1_CLR_RXFIFO (1 << 5) | |
82 | #define CSICR1_GCLK_MODE (1 << 4) | |
83 | #define CSICR1_INV_DATA (1 << 3) | |
84 | #define CSICR1_INV_PCLK (1 << 2) | |
85 | #define CSICR1_REDGE (1 << 1) | |
86 | ||
87 | #define SHIFT_STATFF_LEVEL 22 | |
88 | #define SHIFT_RXFF_LEVEL 19 | |
89 | #define SHIFT_MCLKDIV 12 | |
90 | ||
91 | /* control reg 3 */ | |
92 | #define CSICR3_FRMCNT (0xFFFF << 16) | |
93 | #define CSICR3_FRMCNT_RST (1 << 15) | |
94 | #define CSICR3_DMA_REFLASH_RFF (1 << 14) | |
95 | #define CSICR3_DMA_REFLASH_SFF (1 << 13) | |
96 | #define CSICR3_DMA_REQ_EN_RFF (1 << 12) | |
97 | #define CSICR3_DMA_REQ_EN_SFF (1 << 11) | |
98 | #define CSICR3_RXFF_LEVEL(l) (((l) & 7) << 4) /* MX25 */ | |
99 | #define CSICR3_CSI_SUP (1 << 3) | |
100 | #define CSICR3_ZERO_PACK_EN (1 << 2) | |
101 | #define CSICR3_ECC_INT_EN (1 << 1) | |
102 | #define CSICR3_ECC_AUTO_EN (1 << 0) | |
103 | ||
104 | #define SHIFT_FRMCNT 16 | |
105 | ||
106 | /* csi status reg */ | |
107 | #define CSISR_SFF_OR_INT (1 << 25) | |
108 | #define CSISR_RFF_OR_INT (1 << 24) | |
109 | #define CSISR_STATFF_INT (1 << 21) | |
110 | #define CSISR_DMA_TSF_FB2_INT (1 << 20) /* MX25 */ | |
111 | #define CSISR_DMA_TSF_FB1_INT (1 << 19) /* MX25 */ | |
112 | #define CSISR_RXFF_INT (1 << 18) | |
113 | #define CSISR_EOF_INT (1 << 17) | |
114 | #define CSISR_SOF_INT (1 << 16) | |
115 | #define CSISR_F2_INT (1 << 15) | |
116 | #define CSISR_F1_INT (1 << 14) | |
117 | #define CSISR_COF_INT (1 << 13) | |
118 | #define CSISR_ECC_INT (1 << 1) | |
119 | #define CSISR_DRDY (1 << 0) | |
120 | ||
121 | #define CSICR1 0x00 | |
122 | #define CSICR2 0x04 | |
123 | #define CSISR (cpu_is_mx27() ? 0x08 : 0x18) | |
124 | #define CSISTATFIFO 0x0c | |
125 | #define CSIRFIFO 0x10 | |
126 | #define CSIRXCNT 0x14 | |
127 | #define CSICR3 (cpu_is_mx27() ? 0x1C : 0x08) | |
128 | #define CSIDMASA_STATFIFO 0x20 | |
129 | #define CSIDMATA_STATFIFO 0x24 | |
130 | #define CSIDMASA_FB1 0x28 | |
131 | #define CSIDMASA_FB2 0x2c | |
132 | #define CSIFBUF_PARA 0x30 | |
133 | #define CSIIMAG_PARA 0x34 | |
134 | ||
135 | /* EMMA PrP */ | |
136 | #define PRP_CNTL 0x00 | |
137 | #define PRP_INTR_CNTL 0x04 | |
138 | #define PRP_INTRSTATUS 0x08 | |
139 | #define PRP_SOURCE_Y_PTR 0x0c | |
140 | #define PRP_SOURCE_CB_PTR 0x10 | |
141 | #define PRP_SOURCE_CR_PTR 0x14 | |
142 | #define PRP_DEST_RGB1_PTR 0x18 | |
143 | #define PRP_DEST_RGB2_PTR 0x1c | |
144 | #define PRP_DEST_Y_PTR 0x20 | |
145 | #define PRP_DEST_CB_PTR 0x24 | |
146 | #define PRP_DEST_CR_PTR 0x28 | |
147 | #define PRP_SRC_FRAME_SIZE 0x2c | |
148 | #define PRP_DEST_CH1_LINE_STRIDE 0x30 | |
149 | #define PRP_SRC_PIXEL_FORMAT_CNTL 0x34 | |
150 | #define PRP_CH1_PIXEL_FORMAT_CNTL 0x38 | |
151 | #define PRP_CH1_OUT_IMAGE_SIZE 0x3c | |
152 | #define PRP_CH2_OUT_IMAGE_SIZE 0x40 | |
153 | #define PRP_SRC_LINE_STRIDE 0x44 | |
154 | #define PRP_CSC_COEF_012 0x48 | |
155 | #define PRP_CSC_COEF_345 0x4c | |
156 | #define PRP_CSC_COEF_678 0x50 | |
157 | #define PRP_CH1_RZ_HORI_COEF1 0x54 | |
158 | #define PRP_CH1_RZ_HORI_COEF2 0x58 | |
159 | #define PRP_CH1_RZ_HORI_VALID 0x5c | |
160 | #define PRP_CH1_RZ_VERT_COEF1 0x60 | |
161 | #define PRP_CH1_RZ_VERT_COEF2 0x64 | |
162 | #define PRP_CH1_RZ_VERT_VALID 0x68 | |
163 | #define PRP_CH2_RZ_HORI_COEF1 0x6c | |
164 | #define PRP_CH2_RZ_HORI_COEF2 0x70 | |
165 | #define PRP_CH2_RZ_HORI_VALID 0x74 | |
166 | #define PRP_CH2_RZ_VERT_COEF1 0x78 | |
167 | #define PRP_CH2_RZ_VERT_COEF2 0x7c | |
168 | #define PRP_CH2_RZ_VERT_VALID 0x80 | |
169 | ||
170 | #define PRP_CNTL_CH1EN (1 << 0) | |
171 | #define PRP_CNTL_CH2EN (1 << 1) | |
172 | #define PRP_CNTL_CSIEN (1 << 2) | |
173 | #define PRP_CNTL_DATA_IN_YUV420 (0 << 3) | |
174 | #define PRP_CNTL_DATA_IN_YUV422 (1 << 3) | |
175 | #define PRP_CNTL_DATA_IN_RGB16 (2 << 3) | |
176 | #define PRP_CNTL_DATA_IN_RGB32 (3 << 3) | |
177 | #define PRP_CNTL_CH1_OUT_RGB8 (0 << 5) | |
178 | #define PRP_CNTL_CH1_OUT_RGB16 (1 << 5) | |
179 | #define PRP_CNTL_CH1_OUT_RGB32 (2 << 5) | |
180 | #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5) | |
181 | #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7) | |
182 | #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7) | |
183 | #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7) | |
184 | #define PRP_CNTL_CH1_LEN (1 << 9) | |
185 | #define PRP_CNTL_CH2_LEN (1 << 10) | |
186 | #define PRP_CNTL_SKIP_FRAME (1 << 11) | |
187 | #define PRP_CNTL_SWRST (1 << 12) | |
188 | #define PRP_CNTL_CLKEN (1 << 13) | |
189 | #define PRP_CNTL_WEN (1 << 14) | |
190 | #define PRP_CNTL_CH1BYP (1 << 15) | |
191 | #define PRP_CNTL_IN_TSKIP(x) ((x) << 16) | |
192 | #define PRP_CNTL_CH1_TSKIP(x) ((x) << 19) | |
193 | #define PRP_CNTL_CH2_TSKIP(x) ((x) << 22) | |
194 | #define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25) | |
195 | #define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27) | |
196 | #define PRP_CNTL_CH2B1EN (1 << 29) | |
197 | #define PRP_CNTL_CH2B2EN (1 << 30) | |
198 | #define PRP_CNTL_CH2FEN (1 << 31) | |
199 | ||
200 | /* IRQ Enable and status register */ | |
201 | #define PRP_INTR_RDERR (1 << 0) | |
202 | #define PRP_INTR_CH1WERR (1 << 1) | |
203 | #define PRP_INTR_CH2WERR (1 << 2) | |
204 | #define PRP_INTR_CH1FC (1 << 3) | |
205 | #define PRP_INTR_CH2FC (1 << 5) | |
206 | #define PRP_INTR_LBOVF (1 << 7) | |
207 | #define PRP_INTR_CH2OVF (1 << 8) | |
208 | ||
209 | #define mx27_camera_emma(pcdev) (cpu_is_mx27() && pcdev->use_emma) | |
210 | ||
211 | #define MAX_VIDEO_MEM 16 | |
212 | ||
213 | struct mx2_camera_dev { | |
214 | struct device *dev; | |
215 | struct soc_camera_host soc_host; | |
216 | struct soc_camera_device *icd; | |
217 | struct clk *clk_csi, *clk_emma; | |
218 | ||
219 | unsigned int irq_csi, irq_emma; | |
220 | void __iomem *base_csi, *base_emma; | |
221 | unsigned long base_dma; | |
222 | ||
223 | struct mx2_camera_platform_data *pdata; | |
224 | struct resource *res_csi, *res_emma; | |
225 | unsigned long platform_flags; | |
226 | ||
227 | struct list_head capture; | |
228 | struct list_head active_bufs; | |
229 | ||
230 | spinlock_t lock; | |
231 | ||
232 | int dma; | |
233 | struct mx2_buffer *active; | |
234 | struct mx2_buffer *fb1_active; | |
235 | struct mx2_buffer *fb2_active; | |
236 | ||
237 | int use_emma; | |
238 | ||
239 | u32 csicr1; | |
240 | ||
79d3c2c2 | 241 | void *discard_buffer; |
2066930d BS |
242 | dma_addr_t discard_buffer_dma; |
243 | size_t discard_size; | |
244 | }; | |
245 | ||
246 | /* buffer for one video frame */ | |
247 | struct mx2_buffer { | |
248 | /* common v4l buffer stuff -- must be first */ | |
249 | struct videobuf_buffer vb; | |
250 | ||
251 | enum v4l2_mbus_pixelcode code; | |
252 | ||
253 | int bufnum; | |
254 | }; | |
255 | ||
256 | static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev) | |
257 | { | |
258 | unsigned long flags; | |
259 | ||
260 | clk_disable(pcdev->clk_csi); | |
261 | writel(0, pcdev->base_csi + CSICR1); | |
262 | if (mx27_camera_emma(pcdev)) { | |
263 | writel(0, pcdev->base_emma + PRP_CNTL); | |
264 | } else if (cpu_is_mx25()) { | |
265 | spin_lock_irqsave(&pcdev->lock, flags); | |
266 | pcdev->fb1_active = NULL; | |
267 | pcdev->fb2_active = NULL; | |
268 | writel(0, pcdev->base_csi + CSIDMASA_FB1); | |
269 | writel(0, pcdev->base_csi + CSIDMASA_FB2); | |
270 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
271 | } | |
272 | } | |
273 | ||
274 | /* | |
275 | * The following two functions absolutely depend on the fact, that | |
276 | * there can be only one camera on mx2 camera sensor interface | |
277 | */ | |
278 | static int mx2_camera_add_device(struct soc_camera_device *icd) | |
279 | { | |
280 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
281 | struct mx2_camera_dev *pcdev = ici->priv; | |
282 | int ret; | |
283 | u32 csicr1; | |
284 | ||
285 | if (pcdev->icd) | |
286 | return -EBUSY; | |
287 | ||
288 | ret = clk_enable(pcdev->clk_csi); | |
289 | if (ret < 0) | |
290 | return ret; | |
291 | ||
292 | csicr1 = CSICR1_MCLKEN; | |
293 | ||
294 | if (mx27_camera_emma(pcdev)) { | |
295 | csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC | | |
296 | CSICR1_RXFF_LEVEL(0); | |
297 | } else if (cpu_is_mx27()) | |
298 | csicr1 |= CSICR1_SOF_INTEN | CSICR1_RXFF_LEVEL(2); | |
299 | ||
300 | pcdev->csicr1 = csicr1; | |
301 | writel(pcdev->csicr1, pcdev->base_csi + CSICR1); | |
302 | ||
303 | pcdev->icd = icd; | |
304 | ||
305 | dev_info(icd->dev.parent, "Camera driver attached to camera %d\n", | |
306 | icd->devnum); | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | static void mx2_camera_remove_device(struct soc_camera_device *icd) | |
312 | { | |
313 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
314 | struct mx2_camera_dev *pcdev = ici->priv; | |
315 | ||
316 | BUG_ON(icd != pcdev->icd); | |
317 | ||
318 | dev_info(icd->dev.parent, "Camera driver detached from camera %d\n", | |
319 | icd->devnum); | |
320 | ||
321 | mx2_camera_deactivate(pcdev); | |
322 | ||
323 | if (pcdev->discard_buffer) { | |
324 | dma_free_coherent(ici->v4l2_dev.dev, pcdev->discard_size, | |
325 | pcdev->discard_buffer, | |
326 | pcdev->discard_buffer_dma); | |
327 | pcdev->discard_buffer = NULL; | |
328 | } | |
329 | ||
330 | pcdev->icd = NULL; | |
331 | } | |
332 | ||
333 | #ifdef CONFIG_MACH_MX27 | |
334 | static void mx27_camera_dma_enable(struct mx2_camera_dev *pcdev) | |
335 | { | |
336 | u32 tmp; | |
337 | ||
338 | imx_dma_enable(pcdev->dma); | |
339 | ||
340 | tmp = readl(pcdev->base_csi + CSICR1); | |
341 | tmp |= CSICR1_RF_OR_INTEN; | |
342 | writel(tmp, pcdev->base_csi + CSICR1); | |
343 | } | |
344 | ||
345 | static irqreturn_t mx27_camera_irq(int irq_csi, void *data) | |
346 | { | |
347 | struct mx2_camera_dev *pcdev = data; | |
348 | u32 status = readl(pcdev->base_csi + CSISR); | |
349 | ||
350 | if (status & CSISR_SOF_INT && pcdev->active) { | |
351 | u32 tmp; | |
352 | ||
353 | tmp = readl(pcdev->base_csi + CSICR1); | |
354 | writel(tmp | CSICR1_CLR_RXFIFO, pcdev->base_csi + CSICR1); | |
355 | mx27_camera_dma_enable(pcdev); | |
356 | } | |
357 | ||
358 | writel(CSISR_SOF_INT | CSISR_RFF_OR_INT, pcdev->base_csi + CSISR); | |
359 | ||
360 | return IRQ_HANDLED; | |
361 | } | |
362 | #else | |
363 | static irqreturn_t mx27_camera_irq(int irq_csi, void *data) | |
364 | { | |
365 | return IRQ_NONE; | |
366 | } | |
367 | #endif /* CONFIG_MACH_MX27 */ | |
368 | ||
369 | static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb, | |
370 | int state) | |
371 | { | |
372 | struct videobuf_buffer *vb; | |
373 | struct mx2_buffer *buf; | |
374 | struct mx2_buffer **fb_active = fb == 1 ? &pcdev->fb1_active : | |
375 | &pcdev->fb2_active; | |
376 | u32 fb_reg = fb == 1 ? CSIDMASA_FB1 : CSIDMASA_FB2; | |
377 | unsigned long flags; | |
378 | ||
379 | spin_lock_irqsave(&pcdev->lock, flags); | |
380 | ||
5384a12b BS |
381 | if (*fb_active == NULL) |
382 | goto out; | |
383 | ||
2066930d BS |
384 | vb = &(*fb_active)->vb; |
385 | dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | |
386 | vb, vb->baddr, vb->bsize); | |
387 | ||
388 | vb->state = state; | |
389 | do_gettimeofday(&vb->ts); | |
390 | vb->field_count++; | |
391 | ||
392 | wake_up(&vb->done); | |
393 | ||
394 | if (list_empty(&pcdev->capture)) { | |
395 | buf = NULL; | |
396 | writel(0, pcdev->base_csi + fb_reg); | |
397 | } else { | |
398 | buf = list_entry(pcdev->capture.next, struct mx2_buffer, | |
399 | vb.queue); | |
400 | vb = &buf->vb; | |
401 | list_del(&vb->queue); | |
402 | vb->state = VIDEOBUF_ACTIVE; | |
403 | writel(videobuf_to_dma_contig(vb), pcdev->base_csi + fb_reg); | |
404 | } | |
405 | ||
406 | *fb_active = buf; | |
407 | ||
5384a12b | 408 | out: |
2066930d BS |
409 | spin_unlock_irqrestore(&pcdev->lock, flags); |
410 | } | |
411 | ||
412 | static irqreturn_t mx25_camera_irq(int irq_csi, void *data) | |
413 | { | |
414 | struct mx2_camera_dev *pcdev = data; | |
415 | u32 status = readl(pcdev->base_csi + CSISR); | |
416 | ||
417 | if (status & CSISR_DMA_TSF_FB1_INT) | |
418 | mx25_camera_frame_done(pcdev, 1, VIDEOBUF_DONE); | |
419 | else if (status & CSISR_DMA_TSF_FB2_INT) | |
420 | mx25_camera_frame_done(pcdev, 2, VIDEOBUF_DONE); | |
421 | ||
422 | /* FIXME: handle CSISR_RFF_OR_INT */ | |
423 | ||
424 | writel(status, pcdev->base_csi + CSISR); | |
425 | ||
426 | return IRQ_HANDLED; | |
427 | } | |
428 | ||
429 | /* | |
430 | * Videobuf operations | |
431 | */ | |
432 | static int mx2_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, | |
433 | unsigned int *size) | |
434 | { | |
435 | struct soc_camera_device *icd = vq->priv_data; | |
436 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, | |
437 | icd->current_fmt->host_fmt); | |
438 | ||
439 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); | |
440 | ||
441 | if (bytes_per_line < 0) | |
442 | return bytes_per_line; | |
443 | ||
444 | *size = bytes_per_line * icd->user_height; | |
445 | ||
446 | if (0 == *count) | |
447 | *count = 32; | |
448 | if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) | |
449 | *count = (MAX_VIDEO_MEM * 1024 * 1024) / *size; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | static void free_buffer(struct videobuf_queue *vq, struct mx2_buffer *buf) | |
455 | { | |
456 | struct soc_camera_device *icd = vq->priv_data; | |
457 | struct videobuf_buffer *vb = &buf->vb; | |
458 | ||
459 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | |
460 | vb, vb->baddr, vb->bsize); | |
461 | ||
462 | /* | |
463 | * This waits until this buffer is out of danger, i.e., until it is no | |
464 | * longer in STATE_QUEUED or STATE_ACTIVE | |
465 | */ | |
466 | videobuf_waiton(vb, 0, 0); | |
467 | ||
468 | videobuf_dma_contig_free(vq, vb); | |
469 | dev_dbg(&icd->dev, "%s freed\n", __func__); | |
470 | ||
471 | vb->state = VIDEOBUF_NEEDS_INIT; | |
472 | } | |
473 | ||
474 | static int mx2_videobuf_prepare(struct videobuf_queue *vq, | |
475 | struct videobuf_buffer *vb, enum v4l2_field field) | |
476 | { | |
477 | struct soc_camera_device *icd = vq->priv_data; | |
478 | struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb); | |
479 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, | |
480 | icd->current_fmt->host_fmt); | |
481 | int ret = 0; | |
482 | ||
483 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | |
484 | vb, vb->baddr, vb->bsize); | |
485 | ||
486 | if (bytes_per_line < 0) | |
487 | return bytes_per_line; | |
488 | ||
489 | #ifdef DEBUG | |
490 | /* | |
491 | * This can be useful if you want to see if we actually fill | |
492 | * the buffer with something | |
493 | */ | |
494 | memset((void *)vb->baddr, 0xaa, vb->bsize); | |
495 | #endif | |
496 | ||
497 | if (buf->code != icd->current_fmt->code || | |
498 | vb->width != icd->user_width || | |
499 | vb->height != icd->user_height || | |
500 | vb->field != field) { | |
501 | buf->code = icd->current_fmt->code; | |
502 | vb->width = icd->user_width; | |
503 | vb->height = icd->user_height; | |
504 | vb->field = field; | |
505 | vb->state = VIDEOBUF_NEEDS_INIT; | |
506 | } | |
507 | ||
508 | vb->size = bytes_per_line * vb->height; | |
509 | if (vb->baddr && vb->bsize < vb->size) { | |
510 | ret = -EINVAL; | |
511 | goto out; | |
512 | } | |
513 | ||
514 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
515 | ret = videobuf_iolock(vq, vb, NULL); | |
516 | if (ret) | |
517 | goto fail; | |
518 | ||
519 | vb->state = VIDEOBUF_PREPARED; | |
520 | } | |
521 | ||
522 | return 0; | |
523 | ||
524 | fail: | |
525 | free_buffer(vq, buf); | |
526 | out: | |
527 | return ret; | |
528 | } | |
529 | ||
530 | static void mx2_videobuf_queue(struct videobuf_queue *vq, | |
531 | struct videobuf_buffer *vb) | |
532 | { | |
533 | struct soc_camera_device *icd = vq->priv_data; | |
534 | struct soc_camera_host *ici = | |
535 | to_soc_camera_host(icd->dev.parent); | |
536 | struct mx2_camera_dev *pcdev = ici->priv; | |
537 | struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb); | |
538 | unsigned long flags; | |
539 | ||
540 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | |
541 | vb, vb->baddr, vb->bsize); | |
542 | ||
543 | spin_lock_irqsave(&pcdev->lock, flags); | |
544 | ||
545 | vb->state = VIDEOBUF_QUEUED; | |
546 | list_add_tail(&vb->queue, &pcdev->capture); | |
547 | ||
548 | if (mx27_camera_emma(pcdev)) { | |
549 | goto out; | |
550 | #ifdef CONFIG_MACH_MX27 | |
551 | } else if (cpu_is_mx27()) { | |
552 | int ret; | |
553 | ||
554 | if (pcdev->active == NULL) { | |
555 | ret = imx_dma_setup_single(pcdev->dma, | |
556 | videobuf_to_dma_contig(vb), vb->size, | |
557 | (u32)pcdev->base_dma + 0x10, | |
558 | DMA_MODE_READ); | |
559 | if (ret) { | |
560 | vb->state = VIDEOBUF_ERROR; | |
561 | wake_up(&vb->done); | |
562 | goto out; | |
563 | } | |
564 | ||
565 | vb->state = VIDEOBUF_ACTIVE; | |
566 | pcdev->active = buf; | |
567 | } | |
568 | #endif | |
569 | } else { /* cpu_is_mx25() */ | |
570 | u32 csicr3, dma_inten = 0; | |
571 | ||
572 | if (pcdev->fb1_active == NULL) { | |
573 | writel(videobuf_to_dma_contig(vb), | |
574 | pcdev->base_csi + CSIDMASA_FB1); | |
575 | pcdev->fb1_active = buf; | |
576 | dma_inten = CSICR1_FB1_DMA_INTEN; | |
577 | } else if (pcdev->fb2_active == NULL) { | |
578 | writel(videobuf_to_dma_contig(vb), | |
579 | pcdev->base_csi + CSIDMASA_FB2); | |
580 | pcdev->fb2_active = buf; | |
581 | dma_inten = CSICR1_FB2_DMA_INTEN; | |
582 | } | |
583 | ||
584 | if (dma_inten) { | |
585 | list_del(&vb->queue); | |
586 | vb->state = VIDEOBUF_ACTIVE; | |
587 | ||
588 | csicr3 = readl(pcdev->base_csi + CSICR3); | |
589 | ||
590 | /* Reflash DMA */ | |
591 | writel(csicr3 | CSICR3_DMA_REFLASH_RFF, | |
592 | pcdev->base_csi + CSICR3); | |
593 | ||
594 | /* clear & enable interrupts */ | |
595 | writel(dma_inten, pcdev->base_csi + CSISR); | |
596 | pcdev->csicr1 |= dma_inten; | |
597 | writel(pcdev->csicr1, pcdev->base_csi + CSICR1); | |
598 | ||
599 | /* enable DMA */ | |
600 | csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1); | |
601 | writel(csicr3, pcdev->base_csi + CSICR3); | |
602 | } | |
603 | } | |
604 | ||
605 | out: | |
606 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
607 | } | |
608 | ||
609 | static void mx2_videobuf_release(struct videobuf_queue *vq, | |
610 | struct videobuf_buffer *vb) | |
611 | { | |
612 | struct soc_camera_device *icd = vq->priv_data; | |
613 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
614 | struct mx2_camera_dev *pcdev = ici->priv; | |
615 | struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb); | |
616 | unsigned long flags; | |
617 | ||
618 | #ifdef DEBUG | |
619 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | |
620 | vb, vb->baddr, vb->bsize); | |
621 | ||
622 | switch (vb->state) { | |
623 | case VIDEOBUF_ACTIVE: | |
624 | dev_info(&icd->dev, "%s (active)\n", __func__); | |
625 | break; | |
626 | case VIDEOBUF_QUEUED: | |
627 | dev_info(&icd->dev, "%s (queued)\n", __func__); | |
628 | break; | |
629 | case VIDEOBUF_PREPARED: | |
630 | dev_info(&icd->dev, "%s (prepared)\n", __func__); | |
631 | break; | |
632 | default: | |
633 | dev_info(&icd->dev, "%s (unknown) %d\n", __func__, | |
634 | vb->state); | |
635 | break; | |
636 | } | |
637 | #endif | |
638 | ||
639 | /* | |
640 | * Terminate only queued but inactive buffers. Active buffers are | |
641 | * released when they become inactive after videobuf_waiton(). | |
642 | * | |
643 | * FIXME: implement forced termination of active buffers, so that the | |
644 | * user won't get stuck in an uninterruptible state. This requires a | |
645 | * specific handling for each of the three DMA types that this driver | |
646 | * supports. | |
647 | */ | |
648 | spin_lock_irqsave(&pcdev->lock, flags); | |
649 | if (vb->state == VIDEOBUF_QUEUED) { | |
650 | list_del(&vb->queue); | |
651 | vb->state = VIDEOBUF_ERROR; | |
652 | } | |
653 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
654 | ||
655 | free_buffer(vq, buf); | |
656 | } | |
657 | ||
658 | static struct videobuf_queue_ops mx2_videobuf_ops = { | |
659 | .buf_setup = mx2_videobuf_setup, | |
660 | .buf_prepare = mx2_videobuf_prepare, | |
661 | .buf_queue = mx2_videobuf_queue, | |
662 | .buf_release = mx2_videobuf_release, | |
663 | }; | |
664 | ||
665 | static void mx2_camera_init_videobuf(struct videobuf_queue *q, | |
666 | struct soc_camera_device *icd) | |
667 | { | |
668 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
669 | struct mx2_camera_dev *pcdev = ici->priv; | |
670 | ||
671 | videobuf_queue_dma_contig_init(q, &mx2_videobuf_ops, pcdev->dev, | |
672 | &pcdev->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
673 | V4L2_FIELD_NONE, sizeof(struct mx2_buffer), icd); | |
674 | } | |
675 | ||
676 | #define MX2_BUS_FLAGS (SOCAM_DATAWIDTH_8 | \ | |
677 | SOCAM_MASTER | \ | |
678 | SOCAM_VSYNC_ACTIVE_HIGH | \ | |
679 | SOCAM_VSYNC_ACTIVE_LOW | \ | |
680 | SOCAM_HSYNC_ACTIVE_HIGH | \ | |
681 | SOCAM_HSYNC_ACTIVE_LOW | \ | |
682 | SOCAM_PCLK_SAMPLE_RISING | \ | |
683 | SOCAM_PCLK_SAMPLE_FALLING | \ | |
684 | SOCAM_DATA_ACTIVE_HIGH | \ | |
685 | SOCAM_DATA_ACTIVE_LOW) | |
686 | ||
687 | static int mx27_camera_emma_prp_reset(struct mx2_camera_dev *pcdev) | |
688 | { | |
689 | u32 cntl; | |
690 | int count = 0; | |
691 | ||
692 | cntl = readl(pcdev->base_emma + PRP_CNTL); | |
693 | writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL); | |
694 | while (count++ < 100) { | |
695 | if (!(readl(pcdev->base_emma + PRP_CNTL) & PRP_CNTL_SWRST)) | |
696 | return 0; | |
697 | barrier(); | |
698 | udelay(1); | |
699 | } | |
700 | ||
701 | return -ETIMEDOUT; | |
702 | } | |
703 | ||
704 | static void mx27_camera_emma_buf_init(struct soc_camera_device *icd, | |
705 | int bytesperline) | |
706 | { | |
707 | struct soc_camera_host *ici = | |
708 | to_soc_camera_host(icd->dev.parent); | |
709 | struct mx2_camera_dev *pcdev = ici->priv; | |
710 | ||
711 | writel(pcdev->discard_buffer_dma, | |
712 | pcdev->base_emma + PRP_DEST_RGB1_PTR); | |
713 | writel(pcdev->discard_buffer_dma, | |
714 | pcdev->base_emma + PRP_DEST_RGB2_PTR); | |
715 | ||
716 | /* | |
717 | * We only use the EMMA engine to get rid of the broken | |
718 | * DMA Engine. No color space consversion at the moment. | |
719 | * We adjust incoming and outgoing pixelformat to rgb16 | |
720 | * and adjust the bytesperline accordingly. | |
721 | */ | |
722 | writel(PRP_CNTL_CH1EN | | |
723 | PRP_CNTL_CSIEN | | |
724 | PRP_CNTL_DATA_IN_RGB16 | | |
725 | PRP_CNTL_CH1_OUT_RGB16 | | |
726 | PRP_CNTL_CH1_LEN | | |
727 | PRP_CNTL_CH1BYP | | |
728 | PRP_CNTL_CH1_TSKIP(0) | | |
729 | PRP_CNTL_IN_TSKIP(0), | |
730 | pcdev->base_emma + PRP_CNTL); | |
731 | ||
732 | writel(((bytesperline >> 1) << 16) | icd->user_height, | |
733 | pcdev->base_emma + PRP_SRC_FRAME_SIZE); | |
734 | writel(((bytesperline >> 1) << 16) | icd->user_height, | |
735 | pcdev->base_emma + PRP_CH1_OUT_IMAGE_SIZE); | |
736 | writel(bytesperline, | |
737 | pcdev->base_emma + PRP_DEST_CH1_LINE_STRIDE); | |
738 | writel(0x2ca00565, /* RGB565 */ | |
739 | pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL); | |
740 | writel(0x2ca00565, /* RGB565 */ | |
741 | pcdev->base_emma + PRP_CH1_PIXEL_FORMAT_CNTL); | |
742 | ||
743 | /* Enable interrupts */ | |
744 | writel(PRP_INTR_RDERR | | |
745 | PRP_INTR_CH1WERR | | |
746 | PRP_INTR_CH2WERR | | |
747 | PRP_INTR_CH1FC | | |
748 | PRP_INTR_CH2FC | | |
749 | PRP_INTR_LBOVF | | |
750 | PRP_INTR_CH2OVF, | |
751 | pcdev->base_emma + PRP_INTR_CNTL); | |
752 | } | |
753 | ||
754 | static int mx2_camera_set_bus_param(struct soc_camera_device *icd, | |
755 | __u32 pixfmt) | |
756 | { | |
757 | struct soc_camera_host *ici = | |
758 | to_soc_camera_host(icd->dev.parent); | |
759 | struct mx2_camera_dev *pcdev = ici->priv; | |
760 | unsigned long camera_flags, common_flags; | |
761 | int ret = 0; | |
762 | int bytesperline; | |
763 | u32 csicr1 = pcdev->csicr1; | |
764 | ||
765 | camera_flags = icd->ops->query_bus_param(icd); | |
766 | ||
767 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
768 | MX2_BUS_FLAGS); | |
769 | if (!common_flags) | |
770 | return -EINVAL; | |
771 | ||
772 | if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && | |
773 | (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { | |
774 | if (pcdev->platform_flags & MX2_CAMERA_HSYNC_HIGH) | |
775 | common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; | |
776 | else | |
777 | common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; | |
778 | } | |
779 | ||
780 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && | |
781 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { | |
782 | if (pcdev->platform_flags & MX2_CAMERA_PCLK_SAMPLE_RISING) | |
783 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; | |
784 | else | |
785 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; | |
786 | } | |
787 | ||
788 | ret = icd->ops->set_bus_param(icd, common_flags); | |
789 | if (ret < 0) | |
790 | return ret; | |
791 | ||
d86097e1 MG |
792 | if (common_flags & SOCAM_PCLK_SAMPLE_RISING) |
793 | csicr1 |= CSICR1_REDGE; | |
2066930d BS |
794 | if (common_flags & SOCAM_PCLK_SAMPLE_FALLING) |
795 | csicr1 |= CSICR1_INV_PCLK; | |
796 | if (common_flags & SOCAM_VSYNC_ACTIVE_HIGH) | |
797 | csicr1 |= CSICR1_SOF_POL; | |
798 | if (common_flags & SOCAM_HSYNC_ACTIVE_HIGH) | |
799 | csicr1 |= CSICR1_HSYNC_POL; | |
800 | if (pcdev->platform_flags & MX2_CAMERA_SWAP16) | |
801 | csicr1 |= CSICR1_SWAP16_EN; | |
802 | if (pcdev->platform_flags & MX2_CAMERA_EXT_VSYNC) | |
803 | csicr1 |= CSICR1_EXT_VSYNC; | |
804 | if (pcdev->platform_flags & MX2_CAMERA_CCIR) | |
805 | csicr1 |= CSICR1_CCIR_EN; | |
806 | if (pcdev->platform_flags & MX2_CAMERA_CCIR_INTERLACE) | |
807 | csicr1 |= CSICR1_CCIR_MODE; | |
808 | if (pcdev->platform_flags & MX2_CAMERA_GATED_CLOCK) | |
809 | csicr1 |= CSICR1_GCLK_MODE; | |
810 | if (pcdev->platform_flags & MX2_CAMERA_INV_DATA) | |
811 | csicr1 |= CSICR1_INV_DATA; | |
812 | if (pcdev->platform_flags & MX2_CAMERA_PACK_DIR_MSB) | |
813 | csicr1 |= CSICR1_PACK_DIR; | |
814 | ||
815 | pcdev->csicr1 = csicr1; | |
816 | ||
817 | bytesperline = soc_mbus_bytes_per_line(icd->user_width, | |
818 | icd->current_fmt->host_fmt); | |
819 | if (bytesperline < 0) | |
820 | return bytesperline; | |
821 | ||
822 | if (mx27_camera_emma(pcdev)) { | |
823 | ret = mx27_camera_emma_prp_reset(pcdev); | |
824 | if (ret) | |
825 | return ret; | |
826 | ||
827 | if (pcdev->discard_buffer) | |
828 | dma_free_coherent(ici->v4l2_dev.dev, | |
829 | pcdev->discard_size, pcdev->discard_buffer, | |
830 | pcdev->discard_buffer_dma); | |
831 | ||
832 | /* | |
833 | * I didn't manage to properly enable/disable the prp | |
834 | * on a per frame basis during running transfers, | |
835 | * thus we allocate a buffer here and use it to | |
836 | * discard frames when no buffer is available. | |
837 | * Feel free to work on this ;) | |
838 | */ | |
839 | pcdev->discard_size = icd->user_height * bytesperline; | |
840 | pcdev->discard_buffer = dma_alloc_coherent(ici->v4l2_dev.dev, | |
841 | pcdev->discard_size, &pcdev->discard_buffer_dma, | |
842 | GFP_KERNEL); | |
843 | if (!pcdev->discard_buffer) | |
844 | return -ENOMEM; | |
845 | ||
846 | mx27_camera_emma_buf_init(icd, bytesperline); | |
847 | } else if (cpu_is_mx25()) { | |
848 | writel((bytesperline * icd->user_height) >> 2, | |
849 | pcdev->base_csi + CSIRXCNT); | |
850 | writel((bytesperline << 16) | icd->user_height, | |
851 | pcdev->base_csi + CSIIMAG_PARA); | |
852 | } | |
853 | ||
854 | writel(pcdev->csicr1, pcdev->base_csi + CSICR1); | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | static int mx2_camera_set_crop(struct soc_camera_device *icd, | |
860 | struct v4l2_crop *a) | |
861 | { | |
862 | struct v4l2_rect *rect = &a->c; | |
863 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
864 | struct v4l2_mbus_framefmt mf; | |
865 | int ret; | |
866 | ||
867 | soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096); | |
868 | soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096); | |
869 | ||
870 | ret = v4l2_subdev_call(sd, video, s_crop, a); | |
871 | if (ret < 0) | |
872 | return ret; | |
873 | ||
874 | /* The capture device might have changed its output */ | |
875 | ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); | |
876 | if (ret < 0) | |
877 | return ret; | |
878 | ||
879 | dev_dbg(icd->dev.parent, "Sensor cropped %dx%d\n", | |
880 | mf.width, mf.height); | |
881 | ||
882 | icd->user_width = mf.width; | |
883 | icd->user_height = mf.height; | |
884 | ||
885 | return ret; | |
886 | } | |
887 | ||
888 | static int mx2_camera_set_fmt(struct soc_camera_device *icd, | |
889 | struct v4l2_format *f) | |
890 | { | |
891 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
892 | struct mx2_camera_dev *pcdev = ici->priv; | |
893 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
894 | const struct soc_camera_format_xlate *xlate; | |
895 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
896 | struct v4l2_mbus_framefmt mf; | |
897 | int ret; | |
898 | ||
899 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | |
900 | if (!xlate) { | |
901 | dev_warn(icd->dev.parent, "Format %x not found\n", | |
902 | pix->pixelformat); | |
903 | return -EINVAL; | |
904 | } | |
905 | ||
906 | /* eMMA can only do RGB565 */ | |
907 | if (mx27_camera_emma(pcdev) && pix->pixelformat != V4L2_PIX_FMT_RGB565) | |
908 | return -EINVAL; | |
909 | ||
910 | mf.width = pix->width; | |
911 | mf.height = pix->height; | |
912 | mf.field = pix->field; | |
913 | mf.colorspace = pix->colorspace; | |
914 | mf.code = xlate->code; | |
915 | ||
916 | ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf); | |
917 | if (ret < 0 && ret != -ENOIOCTLCMD) | |
918 | return ret; | |
919 | ||
920 | if (mf.code != xlate->code) | |
921 | return -EINVAL; | |
922 | ||
923 | pix->width = mf.width; | |
924 | pix->height = mf.height; | |
925 | pix->field = mf.field; | |
926 | pix->colorspace = mf.colorspace; | |
927 | icd->current_fmt = xlate; | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
932 | static int mx2_camera_try_fmt(struct soc_camera_device *icd, | |
933 | struct v4l2_format *f) | |
934 | { | |
935 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
936 | struct mx2_camera_dev *pcdev = ici->priv; | |
937 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
938 | const struct soc_camera_format_xlate *xlate; | |
939 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
940 | struct v4l2_mbus_framefmt mf; | |
941 | __u32 pixfmt = pix->pixelformat; | |
942 | unsigned int width_limit; | |
943 | int ret; | |
944 | ||
945 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); | |
946 | if (pixfmt && !xlate) { | |
947 | dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt); | |
948 | return -EINVAL; | |
949 | } | |
950 | ||
951 | /* FIXME: implement MX27 limits */ | |
952 | ||
953 | /* eMMA can only do RGB565 */ | |
954 | if (mx27_camera_emma(pcdev) && pixfmt != V4L2_PIX_FMT_RGB565) | |
955 | return -EINVAL; | |
956 | ||
957 | /* limit to MX25 hardware capabilities */ | |
958 | if (cpu_is_mx25()) { | |
959 | if (xlate->host_fmt->bits_per_sample <= 8) | |
960 | width_limit = 0xffff * 4; | |
961 | else | |
962 | width_limit = 0xffff * 2; | |
963 | /* CSIIMAG_PARA limit */ | |
964 | if (pix->width > width_limit) | |
965 | pix->width = width_limit; | |
966 | if (pix->height > 0xffff) | |
967 | pix->height = 0xffff; | |
968 | ||
969 | pix->bytesperline = soc_mbus_bytes_per_line(pix->width, | |
970 | xlate->host_fmt); | |
971 | if (pix->bytesperline < 0) | |
972 | return pix->bytesperline; | |
973 | pix->sizeimage = pix->height * pix->bytesperline; | |
974 | if (pix->sizeimage > (4 * 0x3ffff)) { /* CSIRXCNT limit */ | |
975 | dev_warn(icd->dev.parent, | |
976 | "Image size (%u) above limit\n", | |
977 | pix->sizeimage); | |
978 | return -EINVAL; | |
979 | } | |
980 | } | |
981 | ||
982 | /* limit to sensor capabilities */ | |
983 | mf.width = pix->width; | |
984 | mf.height = pix->height; | |
985 | mf.field = pix->field; | |
986 | mf.colorspace = pix->colorspace; | |
987 | mf.code = xlate->code; | |
988 | ||
989 | ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf); | |
990 | if (ret < 0) | |
991 | return ret; | |
992 | ||
993 | if (mf.field == V4L2_FIELD_ANY) | |
994 | mf.field = V4L2_FIELD_NONE; | |
995 | if (mf.field != V4L2_FIELD_NONE) { | |
996 | dev_err(icd->dev.parent, "Field type %d unsupported.\n", | |
997 | mf.field); | |
998 | return -EINVAL; | |
999 | } | |
1000 | ||
1001 | pix->width = mf.width; | |
1002 | pix->height = mf.height; | |
1003 | pix->field = mf.field; | |
1004 | pix->colorspace = mf.colorspace; | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | static int mx2_camera_querycap(struct soc_camera_host *ici, | |
1010 | struct v4l2_capability *cap) | |
1011 | { | |
1012 | /* cap->name is set by the friendly caller:-> */ | |
1013 | strlcpy(cap->card, MX2_CAM_DRIVER_DESCRIPTION, sizeof(cap->card)); | |
1014 | cap->version = MX2_CAM_VERSION_CODE; | |
1015 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | static int mx2_camera_reqbufs(struct soc_camera_file *icf, | |
1021 | struct v4l2_requestbuffers *p) | |
1022 | { | |
1023 | int i; | |
1024 | ||
1025 | for (i = 0; i < p->count; i++) { | |
1026 | struct mx2_buffer *buf = container_of(icf->vb_vidq.bufs[i], | |
1027 | struct mx2_buffer, vb); | |
1028 | INIT_LIST_HEAD(&buf->vb.queue); | |
1029 | } | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | #ifdef CONFIG_MACH_MX27 | |
1035 | static void mx27_camera_frame_done(struct mx2_camera_dev *pcdev, int state) | |
1036 | { | |
1037 | struct videobuf_buffer *vb; | |
1038 | struct mx2_buffer *buf; | |
1039 | unsigned long flags; | |
1040 | int ret; | |
1041 | ||
1042 | spin_lock_irqsave(&pcdev->lock, flags); | |
1043 | ||
1044 | if (!pcdev->active) { | |
1045 | dev_err(pcdev->dev, "%s called with no active buffer!\n", | |
1046 | __func__); | |
1047 | goto out; | |
1048 | } | |
1049 | ||
1050 | vb = &pcdev->active->vb; | |
1051 | buf = container_of(vb, struct mx2_buffer, vb); | |
1052 | WARN_ON(list_empty(&vb->queue)); | |
1053 | dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | |
1054 | vb, vb->baddr, vb->bsize); | |
1055 | ||
1056 | /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ | |
1057 | list_del_init(&vb->queue); | |
1058 | vb->state = state; | |
1059 | do_gettimeofday(&vb->ts); | |
1060 | vb->field_count++; | |
1061 | ||
1062 | wake_up(&vb->done); | |
1063 | ||
1064 | if (list_empty(&pcdev->capture)) { | |
1065 | pcdev->active = NULL; | |
1066 | goto out; | |
1067 | } | |
1068 | ||
1069 | pcdev->active = list_entry(pcdev->capture.next, | |
1070 | struct mx2_buffer, vb.queue); | |
1071 | ||
1072 | vb = &pcdev->active->vb; | |
1073 | vb->state = VIDEOBUF_ACTIVE; | |
1074 | ||
1075 | ret = imx_dma_setup_single(pcdev->dma, videobuf_to_dma_contig(vb), | |
1076 | vb->size, (u32)pcdev->base_dma + 0x10, DMA_MODE_READ); | |
1077 | ||
1078 | if (ret) { | |
1079 | vb->state = VIDEOBUF_ERROR; | |
1080 | pcdev->active = NULL; | |
1081 | wake_up(&vb->done); | |
1082 | } | |
1083 | ||
1084 | out: | |
1085 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
1086 | } | |
1087 | ||
1088 | static void mx27_camera_dma_err_callback(int channel, void *data, int err) | |
1089 | { | |
1090 | struct mx2_camera_dev *pcdev = data; | |
1091 | ||
1092 | mx27_camera_frame_done(pcdev, VIDEOBUF_ERROR); | |
1093 | } | |
1094 | ||
1095 | static void mx27_camera_dma_callback(int channel, void *data) | |
1096 | { | |
1097 | struct mx2_camera_dev *pcdev = data; | |
1098 | ||
1099 | mx27_camera_frame_done(pcdev, VIDEOBUF_DONE); | |
1100 | } | |
1101 | ||
1102 | #define DMA_REQ_CSI_RX 31 /* FIXME: Add this to a resource */ | |
1103 | ||
1104 | static int __devinit mx27_camera_dma_init(struct platform_device *pdev, | |
1105 | struct mx2_camera_dev *pcdev) | |
1106 | { | |
1107 | int err; | |
1108 | ||
1109 | pcdev->dma = imx_dma_request_by_prio("CSI RX DMA", DMA_PRIO_HIGH); | |
1110 | if (pcdev->dma < 0) { | |
1111 | dev_err(&pdev->dev, "%s failed to request DMA channel\n", | |
1112 | __func__); | |
1113 | return pcdev->dma; | |
1114 | } | |
1115 | ||
1116 | err = imx_dma_setup_handlers(pcdev->dma, mx27_camera_dma_callback, | |
1117 | mx27_camera_dma_err_callback, pcdev); | |
1118 | if (err) { | |
1119 | dev_err(&pdev->dev, "%s failed to set DMA callback\n", | |
1120 | __func__); | |
1121 | goto err_out; | |
1122 | } | |
1123 | ||
1124 | err = imx_dma_config_channel(pcdev->dma, | |
1125 | IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_FIFO, | |
1126 | IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, | |
1127 | DMA_REQ_CSI_RX, 1); | |
1128 | if (err) { | |
1129 | dev_err(&pdev->dev, "%s failed to config DMA channel\n", | |
1130 | __func__); | |
1131 | goto err_out; | |
1132 | } | |
1133 | ||
1134 | imx_dma_config_burstlen(pcdev->dma, 64); | |
1135 | ||
1136 | return 0; | |
1137 | ||
1138 | err_out: | |
1139 | imx_dma_free(pcdev->dma); | |
1140 | ||
1141 | return err; | |
1142 | } | |
1143 | #endif /* CONFIG_MACH_MX27 */ | |
1144 | ||
1145 | static unsigned int mx2_camera_poll(struct file *file, poll_table *pt) | |
1146 | { | |
1147 | struct soc_camera_file *icf = file->private_data; | |
1148 | ||
1149 | return videobuf_poll_stream(file, &icf->vb_vidq, pt); | |
1150 | } | |
1151 | ||
1152 | static struct soc_camera_host_ops mx2_soc_camera_host_ops = { | |
1153 | .owner = THIS_MODULE, | |
1154 | .add = mx2_camera_add_device, | |
1155 | .remove = mx2_camera_remove_device, | |
1156 | .set_fmt = mx2_camera_set_fmt, | |
1157 | .set_crop = mx2_camera_set_crop, | |
1158 | .try_fmt = mx2_camera_try_fmt, | |
1159 | .init_videobuf = mx2_camera_init_videobuf, | |
1160 | .reqbufs = mx2_camera_reqbufs, | |
1161 | .poll = mx2_camera_poll, | |
1162 | .querycap = mx2_camera_querycap, | |
1163 | .set_bus_param = mx2_camera_set_bus_param, | |
1164 | }; | |
1165 | ||
1166 | static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev, | |
1167 | int bufnum, int state) | |
1168 | { | |
1169 | struct mx2_buffer *buf; | |
1170 | struct videobuf_buffer *vb; | |
1171 | unsigned long phys; | |
1172 | ||
1173 | if (!list_empty(&pcdev->active_bufs)) { | |
1174 | buf = list_entry(pcdev->active_bufs.next, | |
1175 | struct mx2_buffer, vb.queue); | |
1176 | ||
1177 | BUG_ON(buf->bufnum != bufnum); | |
1178 | ||
1179 | vb = &buf->vb; | |
1180 | #ifdef DEBUG | |
1181 | phys = videobuf_to_dma_contig(vb); | |
1182 | if (readl(pcdev->base_emma + PRP_DEST_RGB1_PTR + 4 * bufnum) | |
1183 | != phys) { | |
1184 | dev_err(pcdev->dev, "%p != %p\n", phys, | |
1185 | readl(pcdev->base_emma + | |
1186 | PRP_DEST_RGB1_PTR + | |
1187 | 4 * bufnum)); | |
1188 | } | |
1189 | #endif | |
1190 | dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, vb, | |
1191 | vb->baddr, vb->bsize); | |
1192 | ||
1193 | list_del(&vb->queue); | |
1194 | vb->state = state; | |
1195 | do_gettimeofday(&vb->ts); | |
1196 | vb->field_count++; | |
1197 | ||
1198 | wake_up(&vb->done); | |
1199 | } | |
1200 | ||
1201 | if (list_empty(&pcdev->capture)) { | |
1202 | writel(pcdev->discard_buffer_dma, pcdev->base_emma + | |
1203 | PRP_DEST_RGB1_PTR + 4 * bufnum); | |
1204 | return; | |
1205 | } | |
1206 | ||
1207 | buf = list_entry(pcdev->capture.next, | |
1208 | struct mx2_buffer, vb.queue); | |
1209 | ||
cd9ebdbc | 1210 | buf->bufnum = !bufnum; |
2066930d BS |
1211 | |
1212 | list_move_tail(pcdev->capture.next, &pcdev->active_bufs); | |
1213 | ||
1214 | vb = &buf->vb; | |
1215 | vb->state = VIDEOBUF_ACTIVE; | |
1216 | ||
1217 | phys = videobuf_to_dma_contig(vb); | |
1218 | writel(phys, pcdev->base_emma + PRP_DEST_RGB1_PTR + 4 * bufnum); | |
1219 | } | |
1220 | ||
1221 | static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data) | |
1222 | { | |
1223 | struct mx2_camera_dev *pcdev = data; | |
1224 | unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS); | |
1225 | struct mx2_buffer *buf; | |
1226 | ||
1227 | if (status & (1 << 7)) { /* overflow */ | |
1228 | u32 cntl; | |
1229 | /* | |
1230 | * We only disable channel 1 here since this is the only | |
1231 | * enabled channel | |
1232 | * | |
1233 | * FIXME: the correct DMA overflow handling should be resetting | |
1234 | * the buffer, returning an error frame, and continuing with | |
1235 | * the next one. | |
1236 | */ | |
1237 | cntl = readl(pcdev->base_emma + PRP_CNTL); | |
1238 | writel(cntl & ~PRP_CNTL_CH1EN, pcdev->base_emma + PRP_CNTL); | |
1239 | writel(cntl, pcdev->base_emma + PRP_CNTL); | |
1240 | } | |
1241 | if ((status & (3 << 5)) == (3 << 5) | |
1242 | && !list_empty(&pcdev->active_bufs)) { | |
1243 | /* | |
1244 | * Both buffers have triggered, process the one we're expecting | |
1245 | * to first | |
1246 | */ | |
1247 | buf = list_entry(pcdev->active_bufs.next, | |
1248 | struct mx2_buffer, vb.queue); | |
1249 | mx27_camera_frame_done_emma(pcdev, buf->bufnum, VIDEOBUF_DONE); | |
1250 | status &= ~(1 << (6 - buf->bufnum)); /* mark processed */ | |
1251 | } | |
1252 | if (status & (1 << 6)) | |
1253 | mx27_camera_frame_done_emma(pcdev, 0, VIDEOBUF_DONE); | |
1254 | if (status & (1 << 5)) | |
1255 | mx27_camera_frame_done_emma(pcdev, 1, VIDEOBUF_DONE); | |
1256 | ||
1257 | writel(status, pcdev->base_emma + PRP_INTRSTATUS); | |
1258 | ||
1259 | return IRQ_HANDLED; | |
1260 | } | |
1261 | ||
1262 | static int __devinit mx27_camera_emma_init(struct mx2_camera_dev *pcdev) | |
1263 | { | |
1264 | struct resource *res_emma = pcdev->res_emma; | |
1265 | int err = 0; | |
1266 | ||
1267 | if (!request_mem_region(res_emma->start, resource_size(res_emma), | |
1268 | MX2_CAM_DRV_NAME)) { | |
1269 | err = -EBUSY; | |
1270 | goto out; | |
1271 | } | |
1272 | ||
1273 | pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma)); | |
1274 | if (!pcdev->base_emma) { | |
1275 | err = -ENOMEM; | |
1276 | goto exit_release; | |
1277 | } | |
1278 | ||
1279 | err = request_irq(pcdev->irq_emma, mx27_camera_emma_irq, 0, | |
1280 | MX2_CAM_DRV_NAME, pcdev); | |
1281 | if (err) { | |
1282 | dev_err(pcdev->dev, "Camera EMMA interrupt register failed \n"); | |
1283 | goto exit_iounmap; | |
1284 | } | |
1285 | ||
1286 | pcdev->clk_emma = clk_get(NULL, "emma"); | |
1287 | if (IS_ERR(pcdev->clk_emma)) { | |
1288 | err = PTR_ERR(pcdev->clk_emma); | |
1289 | goto exit_free_irq; | |
1290 | } | |
1291 | ||
1292 | clk_enable(pcdev->clk_emma); | |
1293 | ||
1294 | err = mx27_camera_emma_prp_reset(pcdev); | |
1295 | if (err) | |
1296 | goto exit_clk_emma_put; | |
1297 | ||
1298 | return err; | |
1299 | ||
1300 | exit_clk_emma_put: | |
1301 | clk_disable(pcdev->clk_emma); | |
1302 | clk_put(pcdev->clk_emma); | |
1303 | exit_free_irq: | |
1304 | free_irq(pcdev->irq_emma, pcdev); | |
1305 | exit_iounmap: | |
1306 | iounmap(pcdev->base_emma); | |
1307 | exit_release: | |
1308 | release_mem_region(res_emma->start, resource_size(res_emma)); | |
1309 | out: | |
1310 | return err; | |
1311 | } | |
1312 | ||
1313 | static int __devinit mx2_camera_probe(struct platform_device *pdev) | |
1314 | { | |
1315 | struct mx2_camera_dev *pcdev; | |
1316 | struct resource *res_csi, *res_emma; | |
1317 | void __iomem *base_csi; | |
1318 | int irq_csi, irq_emma; | |
1319 | irq_handler_t mx2_cam_irq_handler = cpu_is_mx25() ? mx25_camera_irq | |
1320 | : mx27_camera_irq; | |
1321 | int err = 0; | |
1322 | ||
1323 | dev_dbg(&pdev->dev, "initialising\n"); | |
1324 | ||
1325 | res_csi = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1326 | irq_csi = platform_get_irq(pdev, 0); | |
1327 | if (res_csi == NULL || irq_csi < 0) { | |
1328 | dev_err(&pdev->dev, "Missing platform resources data\n"); | |
1329 | err = -ENODEV; | |
1330 | goto exit; | |
1331 | } | |
1332 | ||
1333 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
1334 | if (!pcdev) { | |
1335 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); | |
1336 | err = -ENOMEM; | |
1337 | goto exit; | |
1338 | } | |
1339 | ||
1340 | pcdev->clk_csi = clk_get(&pdev->dev, NULL); | |
1341 | if (IS_ERR(pcdev->clk_csi)) { | |
1342 | err = PTR_ERR(pcdev->clk_csi); | |
1343 | goto exit_kfree; | |
1344 | } | |
1345 | ||
1346 | dev_dbg(&pdev->dev, "Camera clock frequency: %ld\n", | |
1347 | clk_get_rate(pcdev->clk_csi)); | |
1348 | ||
1349 | /* Initialize DMA */ | |
1350 | #ifdef CONFIG_MACH_MX27 | |
1351 | if (cpu_is_mx27()) { | |
1352 | err = mx27_camera_dma_init(pdev, pcdev); | |
1353 | if (err) | |
1354 | goto exit_clk_put; | |
1355 | } | |
1356 | #endif /* CONFIG_MACH_MX27 */ | |
1357 | ||
1358 | pcdev->res_csi = res_csi; | |
1359 | pcdev->pdata = pdev->dev.platform_data; | |
1360 | if (pcdev->pdata) { | |
1361 | long rate; | |
1362 | ||
1363 | pcdev->platform_flags = pcdev->pdata->flags; | |
1364 | ||
1365 | rate = clk_round_rate(pcdev->clk_csi, pcdev->pdata->clk * 2); | |
1366 | if (rate <= 0) { | |
1367 | err = -ENODEV; | |
1368 | goto exit_dma_free; | |
1369 | } | |
1370 | err = clk_set_rate(pcdev->clk_csi, rate); | |
1371 | if (err < 0) | |
1372 | goto exit_dma_free; | |
1373 | } | |
1374 | ||
1375 | INIT_LIST_HEAD(&pcdev->capture); | |
1376 | INIT_LIST_HEAD(&pcdev->active_bufs); | |
1377 | spin_lock_init(&pcdev->lock); | |
1378 | ||
1379 | /* | |
1380 | * Request the regions. | |
1381 | */ | |
1382 | if (!request_mem_region(res_csi->start, resource_size(res_csi), | |
1383 | MX2_CAM_DRV_NAME)) { | |
1384 | err = -EBUSY; | |
1385 | goto exit_dma_free; | |
1386 | } | |
1387 | ||
1388 | base_csi = ioremap(res_csi->start, resource_size(res_csi)); | |
1389 | if (!base_csi) { | |
1390 | err = -ENOMEM; | |
1391 | goto exit_release; | |
1392 | } | |
1393 | pcdev->irq_csi = irq_csi; | |
1394 | pcdev->base_csi = base_csi; | |
1395 | pcdev->base_dma = res_csi->start; | |
1396 | pcdev->dev = &pdev->dev; | |
1397 | ||
1398 | err = request_irq(pcdev->irq_csi, mx2_cam_irq_handler, 0, | |
1399 | MX2_CAM_DRV_NAME, pcdev); | |
1400 | if (err) { | |
1401 | dev_err(pcdev->dev, "Camera interrupt register failed \n"); | |
1402 | goto exit_iounmap; | |
1403 | } | |
1404 | ||
1405 | if (cpu_is_mx27()) { | |
1406 | /* EMMA support */ | |
1407 | res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
1408 | irq_emma = platform_get_irq(pdev, 1); | |
1409 | ||
1410 | if (res_emma && irq_emma >= 0) { | |
1411 | dev_info(&pdev->dev, "Using EMMA\n"); | |
1412 | pcdev->use_emma = 1; | |
1413 | pcdev->res_emma = res_emma; | |
1414 | pcdev->irq_emma = irq_emma; | |
1415 | if (mx27_camera_emma_init(pcdev)) | |
1416 | goto exit_free_irq; | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | pcdev->soc_host.drv_name = MX2_CAM_DRV_NAME, | |
1421 | pcdev->soc_host.ops = &mx2_soc_camera_host_ops, | |
1422 | pcdev->soc_host.priv = pcdev; | |
1423 | pcdev->soc_host.v4l2_dev.dev = &pdev->dev; | |
1424 | pcdev->soc_host.nr = pdev->id; | |
1425 | err = soc_camera_host_register(&pcdev->soc_host); | |
1426 | if (err) | |
1427 | goto exit_free_emma; | |
1428 | ||
1429 | return 0; | |
1430 | ||
1431 | exit_free_emma: | |
1432 | if (mx27_camera_emma(pcdev)) { | |
1433 | free_irq(pcdev->irq_emma, pcdev); | |
1434 | clk_disable(pcdev->clk_emma); | |
1435 | clk_put(pcdev->clk_emma); | |
1436 | iounmap(pcdev->base_emma); | |
1437 | release_mem_region(res_emma->start, resource_size(res_emma)); | |
1438 | } | |
1439 | exit_free_irq: | |
1440 | free_irq(pcdev->irq_csi, pcdev); | |
1441 | exit_iounmap: | |
1442 | iounmap(base_csi); | |
1443 | exit_release: | |
1444 | release_mem_region(res_csi->start, resource_size(res_csi)); | |
1445 | exit_dma_free: | |
1446 | #ifdef CONFIG_MACH_MX27 | |
1447 | if (cpu_is_mx27()) | |
1448 | imx_dma_free(pcdev->dma); | |
1449 | exit_clk_put: | |
1450 | clk_put(pcdev->clk_csi); | |
1451 | #endif /* CONFIG_MACH_MX27 */ | |
1452 | exit_kfree: | |
1453 | kfree(pcdev); | |
1454 | exit: | |
1455 | return err; | |
1456 | } | |
1457 | ||
1458 | static int __devexit mx2_camera_remove(struct platform_device *pdev) | |
1459 | { | |
1460 | struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); | |
1461 | struct mx2_camera_dev *pcdev = container_of(soc_host, | |
1462 | struct mx2_camera_dev, soc_host); | |
1463 | struct resource *res; | |
1464 | ||
1465 | clk_put(pcdev->clk_csi); | |
1466 | #ifdef CONFIG_MACH_MX27 | |
1467 | if (cpu_is_mx27()) | |
1468 | imx_dma_free(pcdev->dma); | |
1469 | #endif /* CONFIG_MACH_MX27 */ | |
1470 | free_irq(pcdev->irq_csi, pcdev); | |
1471 | if (mx27_camera_emma(pcdev)) | |
1472 | free_irq(pcdev->irq_emma, pcdev); | |
1473 | ||
1474 | soc_camera_host_unregister(&pcdev->soc_host); | |
1475 | ||
1476 | iounmap(pcdev->base_csi); | |
1477 | ||
1478 | if (mx27_camera_emma(pcdev)) { | |
1479 | clk_disable(pcdev->clk_emma); | |
1480 | clk_put(pcdev->clk_emma); | |
1481 | iounmap(pcdev->base_emma); | |
1482 | res = pcdev->res_emma; | |
1483 | release_mem_region(res->start, resource_size(res)); | |
1484 | } | |
1485 | ||
1486 | res = pcdev->res_csi; | |
1487 | release_mem_region(res->start, resource_size(res)); | |
1488 | ||
1489 | kfree(pcdev); | |
1490 | ||
1491 | dev_info(&pdev->dev, "MX2 Camera driver unloaded\n"); | |
1492 | ||
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | static struct platform_driver mx2_camera_driver = { | |
1497 | .driver = { | |
1498 | .name = MX2_CAM_DRV_NAME, | |
1499 | }, | |
1500 | .remove = __devexit_p(mx2_camera_remove), | |
1501 | }; | |
1502 | ||
1503 | ||
1504 | static int __init mx2_camera_init(void) | |
1505 | { | |
1506 | return platform_driver_probe(&mx2_camera_driver, &mx2_camera_probe); | |
1507 | } | |
1508 | ||
1509 | static void __exit mx2_camera_exit(void) | |
1510 | { | |
1511 | return platform_driver_unregister(&mx2_camera_driver); | |
1512 | } | |
1513 | ||
1514 | module_init(mx2_camera_init); | |
1515 | module_exit(mx2_camera_exit); | |
1516 | ||
1517 | MODULE_DESCRIPTION("i.MX27/i.MX25 SoC Camera Host driver"); | |
1518 | MODULE_AUTHOR("Sascha Hauer <sha@pengutronix.de>"); | |
1519 | MODULE_LICENSE("GPL"); |