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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
5296b56d GL |
2 | /* |
3 | * Copyright (C) 2008 | |
4 | * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de> | |
5 | * | |
6 | * Copyright (C) 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved. | |
5296b56d GL |
7 | */ |
8 | ||
b7f080cf | 9 | #include <linux/dma-mapping.h> |
5296b56d GL |
10 | #include <linux/init.h> |
11 | #include <linux/platform_device.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/spinlock.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/clk.h> | |
17 | #include <linux/vmalloc.h> | |
18 | #include <linux/string.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/io.h> | |
5c45ad77 | 21 | #include <linux/module.h> |
b8a6d998 | 22 | #include <linux/dma/ipu-dma.h> |
5296b56d | 23 | |
d2ebfb33 | 24 | #include "../dmaengine.h" |
5296b56d GL |
25 | #include "ipu_intern.h" |
26 | ||
27 | #define FS_VF_IN_VALID 0x00000002 | |
28 | #define FS_ENC_IN_VALID 0x00000001 | |
29 | ||
8d47bae0 GL |
30 | static int ipu_disable_channel(struct idmac *idmac, struct idmac_channel *ichan, |
31 | bool wait_for_stop); | |
32 | ||
5296b56d GL |
33 | /* |
34 | * There can be only one, we could allocate it dynamically, but then we'd have | |
35 | * to add an extra parameter to some functions, and use something as ugly as | |
36 | * struct ipu *ipu = to_ipu(to_idmac(ichan->dma_chan.device)); | |
37 | * in the ISR | |
38 | */ | |
39 | static struct ipu ipu_data; | |
40 | ||
41 | #define to_ipu(id) container_of(id, struct ipu, idmac) | |
42 | ||
43 | static u32 __idmac_read_icreg(struct ipu *ipu, unsigned long reg) | |
44 | { | |
45 | return __raw_readl(ipu->reg_ic + reg); | |
46 | } | |
47 | ||
48 | #define idmac_read_icreg(ipu, reg) __idmac_read_icreg(ipu, reg - IC_CONF) | |
49 | ||
50 | static void __idmac_write_icreg(struct ipu *ipu, u32 value, unsigned long reg) | |
51 | { | |
52 | __raw_writel(value, ipu->reg_ic + reg); | |
53 | } | |
54 | ||
55 | #define idmac_write_icreg(ipu, v, reg) __idmac_write_icreg(ipu, v, reg - IC_CONF) | |
56 | ||
57 | static u32 idmac_read_ipureg(struct ipu *ipu, unsigned long reg) | |
58 | { | |
59 | return __raw_readl(ipu->reg_ipu + reg); | |
60 | } | |
61 | ||
62 | static void idmac_write_ipureg(struct ipu *ipu, u32 value, unsigned long reg) | |
63 | { | |
64 | __raw_writel(value, ipu->reg_ipu + reg); | |
65 | } | |
66 | ||
67 | /***************************************************************************** | |
68 | * IPU / IC common functions | |
69 | */ | |
70 | static void dump_idmac_reg(struct ipu *ipu) | |
71 | { | |
72 | dev_dbg(ipu->dev, "IDMAC_CONF 0x%x, IC_CONF 0x%x, IDMAC_CHA_EN 0x%x, " | |
73 | "IDMAC_CHA_PRI 0x%x, IDMAC_CHA_BUSY 0x%x\n", | |
74 | idmac_read_icreg(ipu, IDMAC_CONF), | |
75 | idmac_read_icreg(ipu, IC_CONF), | |
76 | idmac_read_icreg(ipu, IDMAC_CHA_EN), | |
77 | idmac_read_icreg(ipu, IDMAC_CHA_PRI), | |
78 | idmac_read_icreg(ipu, IDMAC_CHA_BUSY)); | |
79 | dev_dbg(ipu->dev, "BUF0_RDY 0x%x, BUF1_RDY 0x%x, CUR_BUF 0x%x, " | |
80 | "DB_MODE 0x%x, TASKS_STAT 0x%x\n", | |
81 | idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY), | |
82 | idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY), | |
83 | idmac_read_ipureg(ipu, IPU_CHA_CUR_BUF), | |
84 | idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL), | |
85 | idmac_read_ipureg(ipu, IPU_TASKS_STAT)); | |
86 | } | |
87 | ||
88 | static uint32_t bytes_per_pixel(enum pixel_fmt fmt) | |
89 | { | |
90 | switch (fmt) { | |
91 | case IPU_PIX_FMT_GENERIC: /* generic data */ | |
92 | case IPU_PIX_FMT_RGB332: | |
93 | case IPU_PIX_FMT_YUV420P: | |
94 | case IPU_PIX_FMT_YUV422P: | |
95 | default: | |
96 | return 1; | |
97 | case IPU_PIX_FMT_RGB565: | |
98 | case IPU_PIX_FMT_YUYV: | |
99 | case IPU_PIX_FMT_UYVY: | |
100 | return 2; | |
101 | case IPU_PIX_FMT_BGR24: | |
102 | case IPU_PIX_FMT_RGB24: | |
103 | return 3; | |
104 | case IPU_PIX_FMT_GENERIC_32: /* generic data */ | |
105 | case IPU_PIX_FMT_BGR32: | |
106 | case IPU_PIX_FMT_RGB32: | |
107 | case IPU_PIX_FMT_ABGR32: | |
108 | return 4; | |
109 | } | |
110 | } | |
111 | ||
0149f7d5 | 112 | /* Enable direct write to memory by the Camera Sensor Interface */ |
5296b56d GL |
113 | static void ipu_ic_enable_task(struct ipu *ipu, enum ipu_channel channel) |
114 | { | |
115 | uint32_t ic_conf, mask; | |
116 | ||
117 | switch (channel) { | |
118 | case IDMAC_IC_0: | |
119 | mask = IC_CONF_PRPENC_EN; | |
120 | break; | |
121 | case IDMAC_IC_7: | |
122 | mask = IC_CONF_RWS_EN | IC_CONF_PRPENC_EN; | |
123 | break; | |
124 | default: | |
125 | return; | |
126 | } | |
127 | ic_conf = idmac_read_icreg(ipu, IC_CONF) | mask; | |
128 | idmac_write_icreg(ipu, ic_conf, IC_CONF); | |
129 | } | |
130 | ||
0149f7d5 | 131 | /* Called under spin_lock_irqsave(&ipu_data.lock) */ |
5296b56d GL |
132 | static void ipu_ic_disable_task(struct ipu *ipu, enum ipu_channel channel) |
133 | { | |
134 | uint32_t ic_conf, mask; | |
135 | ||
136 | switch (channel) { | |
137 | case IDMAC_IC_0: | |
138 | mask = IC_CONF_PRPENC_EN; | |
139 | break; | |
140 | case IDMAC_IC_7: | |
141 | mask = IC_CONF_RWS_EN | IC_CONF_PRPENC_EN; | |
142 | break; | |
143 | default: | |
144 | return; | |
145 | } | |
146 | ic_conf = idmac_read_icreg(ipu, IC_CONF) & ~mask; | |
147 | idmac_write_icreg(ipu, ic_conf, IC_CONF); | |
148 | } | |
149 | ||
150 | static uint32_t ipu_channel_status(struct ipu *ipu, enum ipu_channel channel) | |
151 | { | |
152 | uint32_t stat = TASK_STAT_IDLE; | |
153 | uint32_t task_stat_reg = idmac_read_ipureg(ipu, IPU_TASKS_STAT); | |
154 | ||
155 | switch (channel) { | |
156 | case IDMAC_IC_7: | |
157 | stat = (task_stat_reg & TSTAT_CSI2MEM_MASK) >> | |
158 | TSTAT_CSI2MEM_OFFSET; | |
159 | break; | |
160 | case IDMAC_IC_0: | |
161 | case IDMAC_SDC_0: | |
162 | case IDMAC_SDC_1: | |
163 | default: | |
164 | break; | |
165 | } | |
166 | return stat; | |
167 | } | |
168 | ||
169 | struct chan_param_mem_planar { | |
170 | /* Word 0 */ | |
171 | u32 xv:10; | |
172 | u32 yv:10; | |
173 | u32 xb:12; | |
174 | ||
175 | u32 yb:12; | |
176 | u32 res1:2; | |
177 | u32 nsb:1; | |
178 | u32 lnpb:6; | |
179 | u32 ubo_l:11; | |
180 | ||
181 | u32 ubo_h:15; | |
182 | u32 vbo_l:17; | |
183 | ||
184 | u32 vbo_h:9; | |
185 | u32 res2:3; | |
186 | u32 fw:12; | |
187 | u32 fh_l:8; | |
188 | ||
189 | u32 fh_h:4; | |
190 | u32 res3:28; | |
191 | ||
192 | /* Word 1 */ | |
193 | u32 eba0; | |
194 | ||
195 | u32 eba1; | |
196 | ||
197 | u32 bpp:3; | |
198 | u32 sl:14; | |
199 | u32 pfs:3; | |
200 | u32 bam:3; | |
201 | u32 res4:2; | |
202 | u32 npb:6; | |
203 | u32 res5:1; | |
204 | ||
205 | u32 sat:2; | |
206 | u32 res6:30; | |
207 | } __attribute__ ((packed)); | |
208 | ||
209 | struct chan_param_mem_interleaved { | |
210 | /* Word 0 */ | |
211 | u32 xv:10; | |
212 | u32 yv:10; | |
213 | u32 xb:12; | |
214 | ||
215 | u32 yb:12; | |
216 | u32 sce:1; | |
217 | u32 res1:1; | |
218 | u32 nsb:1; | |
219 | u32 lnpb:6; | |
220 | u32 sx:10; | |
221 | u32 sy_l:1; | |
222 | ||
223 | u32 sy_h:9; | |
224 | u32 ns:10; | |
225 | u32 sm:10; | |
226 | u32 sdx_l:3; | |
227 | ||
228 | u32 sdx_h:2; | |
229 | u32 sdy:5; | |
230 | u32 sdrx:1; | |
231 | u32 sdry:1; | |
232 | u32 sdr1:1; | |
233 | u32 res2:2; | |
234 | u32 fw:12; | |
235 | u32 fh_l:8; | |
236 | ||
237 | u32 fh_h:4; | |
238 | u32 res3:28; | |
239 | ||
240 | /* Word 1 */ | |
241 | u32 eba0; | |
242 | ||
243 | u32 eba1; | |
244 | ||
245 | u32 bpp:3; | |
246 | u32 sl:14; | |
247 | u32 pfs:3; | |
248 | u32 bam:3; | |
249 | u32 res4:2; | |
250 | u32 npb:6; | |
251 | u32 res5:1; | |
252 | ||
253 | u32 sat:2; | |
254 | u32 scc:1; | |
255 | u32 ofs0:5; | |
256 | u32 ofs1:5; | |
257 | u32 ofs2:5; | |
258 | u32 ofs3:5; | |
259 | u32 wid0:3; | |
260 | u32 wid1:3; | |
261 | u32 wid2:3; | |
262 | ||
263 | u32 wid3:3; | |
264 | u32 dec_sel:1; | |
265 | u32 res6:28; | |
266 | } __attribute__ ((packed)); | |
267 | ||
268 | union chan_param_mem { | |
269 | struct chan_param_mem_planar pp; | |
270 | struct chan_param_mem_interleaved ip; | |
271 | }; | |
272 | ||
273 | static void ipu_ch_param_set_plane_offset(union chan_param_mem *params, | |
274 | u32 u_offset, u32 v_offset) | |
275 | { | |
276 | params->pp.ubo_l = u_offset & 0x7ff; | |
277 | params->pp.ubo_h = u_offset >> 11; | |
278 | params->pp.vbo_l = v_offset & 0x1ffff; | |
279 | params->pp.vbo_h = v_offset >> 17; | |
280 | } | |
281 | ||
282 | static void ipu_ch_param_set_size(union chan_param_mem *params, | |
283 | uint32_t pixel_fmt, uint16_t width, | |
284 | uint16_t height, uint16_t stride) | |
285 | { | |
286 | u32 u_offset; | |
287 | u32 v_offset; | |
288 | ||
289 | params->pp.fw = width - 1; | |
290 | params->pp.fh_l = height - 1; | |
291 | params->pp.fh_h = (height - 1) >> 8; | |
292 | params->pp.sl = stride - 1; | |
293 | ||
294 | switch (pixel_fmt) { | |
295 | case IPU_PIX_FMT_GENERIC: | |
296 | /*Represents 8-bit Generic data */ | |
297 | params->pp.bpp = 3; | |
298 | params->pp.pfs = 7; | |
299 | params->pp.npb = 31; | |
300 | params->pp.sat = 2; /* SAT = use 32-bit access */ | |
301 | break; | |
302 | case IPU_PIX_FMT_GENERIC_32: | |
303 | /*Represents 32-bit Generic data */ | |
304 | params->pp.bpp = 0; | |
305 | params->pp.pfs = 7; | |
306 | params->pp.npb = 7; | |
307 | params->pp.sat = 2; /* SAT = use 32-bit access */ | |
308 | break; | |
309 | case IPU_PIX_FMT_RGB565: | |
310 | params->ip.bpp = 2; | |
311 | params->ip.pfs = 4; | |
c99e7843 | 312 | params->ip.npb = 15; |
5296b56d GL |
313 | params->ip.sat = 2; /* SAT = 32-bit access */ |
314 | params->ip.ofs0 = 0; /* Red bit offset */ | |
315 | params->ip.ofs1 = 5; /* Green bit offset */ | |
316 | params->ip.ofs2 = 11; /* Blue bit offset */ | |
317 | params->ip.ofs3 = 16; /* Alpha bit offset */ | |
318 | params->ip.wid0 = 4; /* Red bit width - 1 */ | |
319 | params->ip.wid1 = 5; /* Green bit width - 1 */ | |
320 | params->ip.wid2 = 4; /* Blue bit width - 1 */ | |
321 | break; | |
322 | case IPU_PIX_FMT_BGR24: | |
323 | params->ip.bpp = 1; /* 24 BPP & RGB PFS */ | |
324 | params->ip.pfs = 4; | |
325 | params->ip.npb = 7; | |
326 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
327 | params->ip.ofs0 = 0; /* Red bit offset */ | |
328 | params->ip.ofs1 = 8; /* Green bit offset */ | |
329 | params->ip.ofs2 = 16; /* Blue bit offset */ | |
330 | params->ip.ofs3 = 24; /* Alpha bit offset */ | |
331 | params->ip.wid0 = 7; /* Red bit width - 1 */ | |
332 | params->ip.wid1 = 7; /* Green bit width - 1 */ | |
333 | params->ip.wid2 = 7; /* Blue bit width - 1 */ | |
334 | break; | |
335 | case IPU_PIX_FMT_RGB24: | |
336 | params->ip.bpp = 1; /* 24 BPP & RGB PFS */ | |
337 | params->ip.pfs = 4; | |
338 | params->ip.npb = 7; | |
339 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
340 | params->ip.ofs0 = 16; /* Red bit offset */ | |
341 | params->ip.ofs1 = 8; /* Green bit offset */ | |
342 | params->ip.ofs2 = 0; /* Blue bit offset */ | |
343 | params->ip.ofs3 = 24; /* Alpha bit offset */ | |
344 | params->ip.wid0 = 7; /* Red bit width - 1 */ | |
345 | params->ip.wid1 = 7; /* Green bit width - 1 */ | |
346 | params->ip.wid2 = 7; /* Blue bit width - 1 */ | |
347 | break; | |
348 | case IPU_PIX_FMT_BGRA32: | |
349 | case IPU_PIX_FMT_BGR32: | |
9ad7bd29 | 350 | case IPU_PIX_FMT_ABGR32: |
5296b56d GL |
351 | params->ip.bpp = 0; |
352 | params->ip.pfs = 4; | |
353 | params->ip.npb = 7; | |
354 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
355 | params->ip.ofs0 = 8; /* Red bit offset */ | |
356 | params->ip.ofs1 = 16; /* Green bit offset */ | |
357 | params->ip.ofs2 = 24; /* Blue bit offset */ | |
358 | params->ip.ofs3 = 0; /* Alpha bit offset */ | |
359 | params->ip.wid0 = 7; /* Red bit width - 1 */ | |
360 | params->ip.wid1 = 7; /* Green bit width - 1 */ | |
361 | params->ip.wid2 = 7; /* Blue bit width - 1 */ | |
362 | params->ip.wid3 = 7; /* Alpha bit width - 1 */ | |
363 | break; | |
364 | case IPU_PIX_FMT_RGBA32: | |
365 | case IPU_PIX_FMT_RGB32: | |
366 | params->ip.bpp = 0; | |
367 | params->ip.pfs = 4; | |
368 | params->ip.npb = 7; | |
369 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
370 | params->ip.ofs0 = 24; /* Red bit offset */ | |
371 | params->ip.ofs1 = 16; /* Green bit offset */ | |
372 | params->ip.ofs2 = 8; /* Blue bit offset */ | |
373 | params->ip.ofs3 = 0; /* Alpha bit offset */ | |
374 | params->ip.wid0 = 7; /* Red bit width - 1 */ | |
375 | params->ip.wid1 = 7; /* Green bit width - 1 */ | |
376 | params->ip.wid2 = 7; /* Blue bit width - 1 */ | |
5296b56d GL |
377 | params->ip.wid3 = 7; /* Alpha bit width - 1 */ |
378 | break; | |
379 | case IPU_PIX_FMT_UYVY: | |
380 | params->ip.bpp = 2; | |
381 | params->ip.pfs = 6; | |
382 | params->ip.npb = 7; | |
383 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
384 | break; | |
385 | case IPU_PIX_FMT_YUV420P2: | |
386 | case IPU_PIX_FMT_YUV420P: | |
387 | params->ip.bpp = 3; | |
388 | params->ip.pfs = 3; | |
389 | params->ip.npb = 7; | |
390 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
391 | u_offset = stride * height; | |
392 | v_offset = u_offset + u_offset / 4; | |
393 | ipu_ch_param_set_plane_offset(params, u_offset, v_offset); | |
394 | break; | |
395 | case IPU_PIX_FMT_YVU422P: | |
396 | params->ip.bpp = 3; | |
397 | params->ip.pfs = 2; | |
398 | params->ip.npb = 7; | |
399 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
400 | v_offset = stride * height; | |
401 | u_offset = v_offset + v_offset / 2; | |
402 | ipu_ch_param_set_plane_offset(params, u_offset, v_offset); | |
403 | break; | |
404 | case IPU_PIX_FMT_YUV422P: | |
405 | params->ip.bpp = 3; | |
406 | params->ip.pfs = 2; | |
407 | params->ip.npb = 7; | |
408 | params->ip.sat = 2; /* SAT = 32-bit access */ | |
409 | u_offset = stride * height; | |
410 | v_offset = u_offset + u_offset / 2; | |
411 | ipu_ch_param_set_plane_offset(params, u_offset, v_offset); | |
412 | break; | |
413 | default: | |
414 | dev_err(ipu_data.dev, | |
0149f7d5 | 415 | "mx3 ipu: unimplemented pixel format %d\n", pixel_fmt); |
5296b56d GL |
416 | break; |
417 | } | |
418 | ||
419 | params->pp.nsb = 1; | |
420 | } | |
421 | ||
5296b56d GL |
422 | static void ipu_ch_param_set_buffer(union chan_param_mem *params, |
423 | dma_addr_t buf0, dma_addr_t buf1) | |
424 | { | |
425 | params->pp.eba0 = buf0; | |
426 | params->pp.eba1 = buf1; | |
0149f7d5 | 427 | } |
5296b56d GL |
428 | |
429 | static void ipu_ch_param_set_rotation(union chan_param_mem *params, | |
430 | enum ipu_rotate_mode rotate) | |
431 | { | |
432 | params->pp.bam = rotate; | |
0149f7d5 | 433 | } |
5296b56d GL |
434 | |
435 | static void ipu_write_param_mem(uint32_t addr, uint32_t *data, | |
436 | uint32_t num_words) | |
437 | { | |
438 | for (; num_words > 0; num_words--) { | |
439 | dev_dbg(ipu_data.dev, | |
440 | "write param mem - addr = 0x%08X, data = 0x%08X\n", | |
441 | addr, *data); | |
442 | idmac_write_ipureg(&ipu_data, addr, IPU_IMA_ADDR); | |
443 | idmac_write_ipureg(&ipu_data, *data++, IPU_IMA_DATA); | |
444 | addr++; | |
445 | if ((addr & 0x7) == 5) { | |
446 | addr &= ~0x7; /* set to word 0 */ | |
447 | addr += 8; /* increment to next row */ | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
452 | static int calc_resize_coeffs(uint32_t in_size, uint32_t out_size, | |
453 | uint32_t *resize_coeff, | |
454 | uint32_t *downsize_coeff) | |
455 | { | |
456 | uint32_t temp_size; | |
457 | uint32_t temp_downsize; | |
458 | ||
459 | *resize_coeff = 1 << 13; | |
460 | *downsize_coeff = 1 << 13; | |
461 | ||
462 | /* Cannot downsize more than 8:1 */ | |
463 | if (out_size << 3 < in_size) | |
464 | return -EINVAL; | |
465 | ||
466 | /* compute downsizing coefficient */ | |
467 | temp_downsize = 0; | |
468 | temp_size = in_size; | |
469 | while (temp_size >= out_size * 2 && temp_downsize < 2) { | |
470 | temp_size >>= 1; | |
471 | temp_downsize++; | |
472 | } | |
473 | *downsize_coeff = temp_downsize; | |
474 | ||
475 | /* | |
476 | * compute resizing coefficient using the following formula: | |
477 | * resize_coeff = M*(SI -1)/(SO - 1) | |
478 | * where M = 2^13, SI - input size, SO - output size | |
479 | */ | |
480 | *resize_coeff = (8192L * (temp_size - 1)) / (out_size - 1); | |
481 | if (*resize_coeff >= 16384L) { | |
482 | dev_err(ipu_data.dev, "Warning! Overflow on resize coeff.\n"); | |
483 | *resize_coeff = 0x3FFF; | |
484 | } | |
485 | ||
486 | dev_dbg(ipu_data.dev, "resizing from %u -> %u pixels, " | |
487 | "downsize=%u, resize=%u.%lu (reg=%u)\n", in_size, out_size, | |
488 | *downsize_coeff, *resize_coeff >= 8192L ? 1 : 0, | |
489 | ((*resize_coeff & 0x1FFF) * 10000L) / 8192L, *resize_coeff); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static enum ipu_color_space format_to_colorspace(enum pixel_fmt fmt) | |
495 | { | |
496 | switch (fmt) { | |
497 | case IPU_PIX_FMT_RGB565: | |
498 | case IPU_PIX_FMT_BGR24: | |
499 | case IPU_PIX_FMT_RGB24: | |
500 | case IPU_PIX_FMT_BGR32: | |
501 | case IPU_PIX_FMT_RGB32: | |
502 | return IPU_COLORSPACE_RGB; | |
503 | default: | |
504 | return IPU_COLORSPACE_YCBCR; | |
505 | } | |
506 | } | |
507 | ||
508 | static int ipu_ic_init_prpenc(struct ipu *ipu, | |
509 | union ipu_channel_param *params, bool src_is_csi) | |
510 | { | |
511 | uint32_t reg, ic_conf; | |
512 | uint32_t downsize_coeff, resize_coeff; | |
513 | enum ipu_color_space in_fmt, out_fmt; | |
514 | ||
515 | /* Setup vertical resizing */ | |
516 | calc_resize_coeffs(params->video.in_height, | |
517 | params->video.out_height, | |
518 | &resize_coeff, &downsize_coeff); | |
519 | reg = (downsize_coeff << 30) | (resize_coeff << 16); | |
520 | ||
521 | /* Setup horizontal resizing */ | |
522 | calc_resize_coeffs(params->video.in_width, | |
523 | params->video.out_width, | |
524 | &resize_coeff, &downsize_coeff); | |
525 | reg |= (downsize_coeff << 14) | resize_coeff; | |
526 | ||
527 | /* Setup color space conversion */ | |
528 | in_fmt = format_to_colorspace(params->video.in_pixel_fmt); | |
529 | out_fmt = format_to_colorspace(params->video.out_pixel_fmt); | |
530 | ||
531 | /* | |
532 | * Colourspace conversion unsupported yet - see _init_csc() in | |
533 | * Freescale sources | |
534 | */ | |
535 | if (in_fmt != out_fmt) { | |
536 | dev_err(ipu->dev, "Colourspace conversion unsupported!\n"); | |
537 | return -EOPNOTSUPP; | |
538 | } | |
539 | ||
540 | idmac_write_icreg(ipu, reg, IC_PRP_ENC_RSC); | |
541 | ||
542 | ic_conf = idmac_read_icreg(ipu, IC_CONF); | |
543 | ||
544 | if (src_is_csi) | |
545 | ic_conf &= ~IC_CONF_RWS_EN; | |
546 | else | |
547 | ic_conf |= IC_CONF_RWS_EN; | |
548 | ||
549 | idmac_write_icreg(ipu, ic_conf, IC_CONF); | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static uint32_t dma_param_addr(uint32_t dma_ch) | |
555 | { | |
556 | /* Channel Parameter Memory */ | |
557 | return 0x10000 | (dma_ch << 4); | |
0149f7d5 | 558 | } |
5296b56d GL |
559 | |
560 | static void ipu_channel_set_priority(struct ipu *ipu, enum ipu_channel channel, | |
561 | bool prio) | |
562 | { | |
563 | u32 reg = idmac_read_icreg(ipu, IDMAC_CHA_PRI); | |
564 | ||
565 | if (prio) | |
566 | reg |= 1UL << channel; | |
567 | else | |
568 | reg &= ~(1UL << channel); | |
569 | ||
570 | idmac_write_icreg(ipu, reg, IDMAC_CHA_PRI); | |
571 | ||
572 | dump_idmac_reg(ipu); | |
573 | } | |
574 | ||
575 | static uint32_t ipu_channel_conf_mask(enum ipu_channel channel) | |
576 | { | |
577 | uint32_t mask; | |
578 | ||
579 | switch (channel) { | |
580 | case IDMAC_IC_0: | |
581 | case IDMAC_IC_7: | |
582 | mask = IPU_CONF_CSI_EN | IPU_CONF_IC_EN; | |
583 | break; | |
584 | case IDMAC_SDC_0: | |
585 | case IDMAC_SDC_1: | |
586 | mask = IPU_CONF_SDC_EN | IPU_CONF_DI_EN; | |
587 | break; | |
588 | default: | |
589 | mask = 0; | |
590 | break; | |
591 | } | |
592 | ||
593 | return mask; | |
594 | } | |
595 | ||
596 | /** | |
597 | * ipu_enable_channel() - enable an IPU channel. | |
0149f7d5 GL |
598 | * @idmac: IPU DMAC context. |
599 | * @ichan: IDMAC channel. | |
5296b56d GL |
600 | * @return: 0 on success or negative error code on failure. |
601 | */ | |
602 | static int ipu_enable_channel(struct idmac *idmac, struct idmac_channel *ichan) | |
603 | { | |
604 | struct ipu *ipu = to_ipu(idmac); | |
605 | enum ipu_channel channel = ichan->dma_chan.chan_id; | |
606 | uint32_t reg; | |
607 | unsigned long flags; | |
608 | ||
609 | spin_lock_irqsave(&ipu->lock, flags); | |
610 | ||
611 | /* Reset to buffer 0 */ | |
612 | idmac_write_ipureg(ipu, 1UL << channel, IPU_CHA_CUR_BUF); | |
613 | ichan->active_buffer = 0; | |
614 | ichan->status = IPU_CHANNEL_ENABLED; | |
615 | ||
616 | switch (channel) { | |
617 | case IDMAC_SDC_0: | |
618 | case IDMAC_SDC_1: | |
619 | case IDMAC_IC_7: | |
620 | ipu_channel_set_priority(ipu, channel, true); | |
621 | default: | |
622 | break; | |
623 | } | |
624 | ||
625 | reg = idmac_read_icreg(ipu, IDMAC_CHA_EN); | |
626 | ||
627 | idmac_write_icreg(ipu, reg | (1UL << channel), IDMAC_CHA_EN); | |
628 | ||
629 | ipu_ic_enable_task(ipu, channel); | |
630 | ||
631 | spin_unlock_irqrestore(&ipu->lock, flags); | |
632 | return 0; | |
633 | } | |
634 | ||
635 | /** | |
636 | * ipu_init_channel_buffer() - initialize a buffer for logical IPU channel. | |
0149f7d5 | 637 | * @ichan: IDMAC channel. |
5296b56d GL |
638 | * @pixel_fmt: pixel format of buffer. Pixel format is a FOURCC ASCII code. |
639 | * @width: width of buffer in pixels. | |
640 | * @height: height of buffer in pixels. | |
641 | * @stride: stride length of buffer in pixels. | |
642 | * @rot_mode: rotation mode of buffer. A rotation setting other than | |
643 | * IPU_ROTATE_VERT_FLIP should only be used for input buffers of | |
644 | * rotation channels. | |
645 | * @phyaddr_0: buffer 0 physical address. | |
646 | * @phyaddr_1: buffer 1 physical address. Setting this to a value other than | |
647 | * NULL enables double buffering mode. | |
648 | * @return: 0 on success or negative error code on failure. | |
649 | */ | |
650 | static int ipu_init_channel_buffer(struct idmac_channel *ichan, | |
651 | enum pixel_fmt pixel_fmt, | |
652 | uint16_t width, uint16_t height, | |
653 | uint32_t stride, | |
654 | enum ipu_rotate_mode rot_mode, | |
655 | dma_addr_t phyaddr_0, dma_addr_t phyaddr_1) | |
656 | { | |
657 | enum ipu_channel channel = ichan->dma_chan.chan_id; | |
658 | struct idmac *idmac = to_idmac(ichan->dma_chan.device); | |
659 | struct ipu *ipu = to_ipu(idmac); | |
660 | union chan_param_mem params = {}; | |
661 | unsigned long flags; | |
662 | uint32_t reg; | |
663 | uint32_t stride_bytes; | |
664 | ||
665 | stride_bytes = stride * bytes_per_pixel(pixel_fmt); | |
666 | ||
667 | if (stride_bytes % 4) { | |
668 | dev_err(ipu->dev, | |
669 | "Stride length must be 32-bit aligned, stride = %d, bytes = %d\n", | |
670 | stride, stride_bytes); | |
671 | return -EINVAL; | |
672 | } | |
673 | ||
674 | /* IC channel's stride must be a multiple of 8 pixels */ | |
0149f7d5 | 675 | if ((channel <= IDMAC_IC_13) && (stride % 8)) { |
5296b56d GL |
676 | dev_err(ipu->dev, "Stride must be 8 pixel multiple\n"); |
677 | return -EINVAL; | |
678 | } | |
679 | ||
680 | /* Build parameter memory data for DMA channel */ | |
681 | ipu_ch_param_set_size(¶ms, pixel_fmt, width, height, stride_bytes); | |
682 | ipu_ch_param_set_buffer(¶ms, phyaddr_0, phyaddr_1); | |
683 | ipu_ch_param_set_rotation(¶ms, rot_mode); | |
5296b56d GL |
684 | |
685 | spin_lock_irqsave(&ipu->lock, flags); | |
686 | ||
687 | ipu_write_param_mem(dma_param_addr(channel), (uint32_t *)¶ms, 10); | |
688 | ||
689 | reg = idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL); | |
690 | ||
691 | if (phyaddr_1) | |
692 | reg |= 1UL << channel; | |
693 | else | |
694 | reg &= ~(1UL << channel); | |
695 | ||
696 | idmac_write_ipureg(ipu, reg, IPU_CHA_DB_MODE_SEL); | |
697 | ||
698 | ichan->status = IPU_CHANNEL_READY; | |
699 | ||
c74ef1f8 | 700 | spin_unlock_irqrestore(&ipu->lock, flags); |
5296b56d GL |
701 | |
702 | return 0; | |
703 | } | |
704 | ||
705 | /** | |
706 | * ipu_select_buffer() - mark a channel's buffer as ready. | |
707 | * @channel: channel ID. | |
708 | * @buffer_n: buffer number to mark ready. | |
709 | */ | |
710 | static void ipu_select_buffer(enum ipu_channel channel, int buffer_n) | |
711 | { | |
712 | /* No locking - this is a write-one-to-set register, cleared by IPU */ | |
713 | if (buffer_n == 0) | |
714 | /* Mark buffer 0 as ready. */ | |
715 | idmac_write_ipureg(&ipu_data, 1UL << channel, IPU_CHA_BUF0_RDY); | |
716 | else | |
717 | /* Mark buffer 1 as ready. */ | |
718 | idmac_write_ipureg(&ipu_data, 1UL << channel, IPU_CHA_BUF1_RDY); | |
719 | } | |
720 | ||
721 | /** | |
722 | * ipu_update_channel_buffer() - update physical address of a channel buffer. | |
0149f7d5 | 723 | * @ichan: IDMAC channel. |
5296b56d GL |
724 | * @buffer_n: buffer number to update. |
725 | * 0 or 1 are the only valid values. | |
726 | * @phyaddr: buffer physical address. | |
5296b56d GL |
727 | */ |
728 | /* Called under spin_lock(_irqsave)(&ichan->lock) */ | |
8f98781e GL |
729 | static void ipu_update_channel_buffer(struct idmac_channel *ichan, |
730 | int buffer_n, dma_addr_t phyaddr) | |
5296b56d | 731 | { |
8d47bae0 | 732 | enum ipu_channel channel = ichan->dma_chan.chan_id; |
5296b56d GL |
733 | uint32_t reg; |
734 | unsigned long flags; | |
735 | ||
736 | spin_lock_irqsave(&ipu_data.lock, flags); | |
737 | ||
738 | if (buffer_n == 0) { | |
739 | reg = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF0_RDY); | |
740 | if (reg & (1UL << channel)) { | |
8d47bae0 GL |
741 | ipu_ic_disable_task(&ipu_data, channel); |
742 | ichan->status = IPU_CHANNEL_READY; | |
5296b56d GL |
743 | } |
744 | ||
745 | /* 44.3.3.1.9 - Row Number 1 (WORD1, offset 0) */ | |
746 | idmac_write_ipureg(&ipu_data, dma_param_addr(channel) + | |
747 | 0x0008UL, IPU_IMA_ADDR); | |
748 | idmac_write_ipureg(&ipu_data, phyaddr, IPU_IMA_DATA); | |
749 | } else { | |
750 | reg = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF1_RDY); | |
751 | if (reg & (1UL << channel)) { | |
8d47bae0 GL |
752 | ipu_ic_disable_task(&ipu_data, channel); |
753 | ichan->status = IPU_CHANNEL_READY; | |
5296b56d GL |
754 | } |
755 | ||
756 | /* Check if double-buffering is already enabled */ | |
757 | reg = idmac_read_ipureg(&ipu_data, IPU_CHA_DB_MODE_SEL); | |
758 | ||
759 | if (!(reg & (1UL << channel))) | |
760 | idmac_write_ipureg(&ipu_data, reg | (1UL << channel), | |
761 | IPU_CHA_DB_MODE_SEL); | |
762 | ||
763 | /* 44.3.3.1.9 - Row Number 1 (WORD1, offset 1) */ | |
764 | idmac_write_ipureg(&ipu_data, dma_param_addr(channel) + | |
765 | 0x0009UL, IPU_IMA_ADDR); | |
766 | idmac_write_ipureg(&ipu_data, phyaddr, IPU_IMA_DATA); | |
767 | } | |
768 | ||
769 | spin_unlock_irqrestore(&ipu_data.lock, flags); | |
5296b56d GL |
770 | } |
771 | ||
8d47bae0 GL |
772 | /* Called under spin_lock_irqsave(&ichan->lock) */ |
773 | static int ipu_submit_buffer(struct idmac_channel *ichan, | |
774 | struct idmac_tx_desc *desc, struct scatterlist *sg, int buf_idx) | |
775 | { | |
776 | unsigned int chan_id = ichan->dma_chan.chan_id; | |
777 | struct device *dev = &ichan->dma_chan.dev->device; | |
8d47bae0 GL |
778 | |
779 | if (async_tx_test_ack(&desc->txd)) | |
780 | return -EINTR; | |
781 | ||
782 | /* | |
783 | * On first invocation this shouldn't be necessary, the call to | |
784 | * ipu_init_channel_buffer() above will set addresses for us, so we | |
785 | * could make it conditional on status >= IPU_CHANNEL_ENABLED, but | |
786 | * doing it again shouldn't hurt either. | |
787 | */ | |
8f98781e | 788 | ipu_update_channel_buffer(ichan, buf_idx, sg_dma_address(sg)); |
8d47bae0 GL |
789 | |
790 | ipu_select_buffer(chan_id, buf_idx); | |
791 | dev_dbg(dev, "Updated sg %p on channel 0x%x buffer %d\n", | |
792 | sg, chan_id, buf_idx); | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
5296b56d GL |
797 | /* Called under spin_lock_irqsave(&ichan->lock) */ |
798 | static int ipu_submit_channel_buffers(struct idmac_channel *ichan, | |
799 | struct idmac_tx_desc *desc) | |
800 | { | |
801 | struct scatterlist *sg; | |
802 | int i, ret = 0; | |
803 | ||
804 | for (i = 0, sg = desc->sg; i < 2 && sg; i++) { | |
805 | if (!ichan->sg[i]) { | |
806 | ichan->sg[i] = sg; | |
807 | ||
8d47bae0 | 808 | ret = ipu_submit_buffer(ichan, desc, sg, i); |
5296b56d GL |
809 | if (ret < 0) |
810 | return ret; | |
811 | ||
5296b56d GL |
812 | sg = sg_next(sg); |
813 | } | |
814 | } | |
815 | ||
816 | return ret; | |
817 | } | |
818 | ||
819 | static dma_cookie_t idmac_tx_submit(struct dma_async_tx_descriptor *tx) | |
820 | { | |
821 | struct idmac_tx_desc *desc = to_tx_desc(tx); | |
822 | struct idmac_channel *ichan = to_idmac_chan(tx->chan); | |
823 | struct idmac *idmac = to_idmac(tx->chan->device); | |
824 | struct ipu *ipu = to_ipu(idmac); | |
8d47bae0 | 825 | struct device *dev = &ichan->dma_chan.dev->device; |
5296b56d GL |
826 | dma_cookie_t cookie; |
827 | unsigned long flags; | |
8d47bae0 | 828 | int ret; |
5296b56d GL |
829 | |
830 | /* Sanity check */ | |
831 | if (!list_empty(&desc->list)) { | |
832 | /* The descriptor doesn't belong to client */ | |
8d47bae0 | 833 | dev_err(dev, "Descriptor %p not prepared!\n", tx); |
5296b56d GL |
834 | return -EBUSY; |
835 | } | |
836 | ||
837 | mutex_lock(&ichan->chan_mutex); | |
838 | ||
8d47bae0 GL |
839 | async_tx_clear_ack(tx); |
840 | ||
5296b56d GL |
841 | if (ichan->status < IPU_CHANNEL_READY) { |
842 | struct idmac_video_param *video = &ichan->params.video; | |
843 | /* | |
844 | * Initial buffer assignment - the first two sg-entries from | |
845 | * the descriptor will end up in the IDMAC buffers | |
846 | */ | |
847 | dma_addr_t dma_1 = sg_is_last(desc->sg) ? 0 : | |
848 | sg_dma_address(&desc->sg[1]); | |
849 | ||
850 | WARN_ON(ichan->sg[0] || ichan->sg[1]); | |
851 | ||
852 | cookie = ipu_init_channel_buffer(ichan, | |
853 | video->out_pixel_fmt, | |
854 | video->out_width, | |
855 | video->out_height, | |
856 | video->out_stride, | |
857 | IPU_ROTATE_NONE, | |
858 | sg_dma_address(&desc->sg[0]), | |
859 | dma_1); | |
860 | if (cookie < 0) | |
861 | goto out; | |
862 | } | |
863 | ||
8d47bae0 | 864 | dev_dbg(dev, "Submitting sg %p\n", &desc->sg[0]); |
5296b56d | 865 | |
884485e1 | 866 | cookie = dma_cookie_assign(tx); |
8d47bae0 GL |
867 | |
868 | /* ipu->lock can be taken under ichan->lock, but not v.v. */ | |
5296b56d | 869 | spin_lock_irqsave(&ichan->lock, flags); |
8d47bae0 | 870 | |
5296b56d | 871 | list_add_tail(&desc->list, &ichan->queue); |
8d47bae0 GL |
872 | /* submit_buffers() atomically verifies and fills empty sg slots */ |
873 | ret = ipu_submit_channel_buffers(ichan, desc); | |
874 | ||
5296b56d GL |
875 | spin_unlock_irqrestore(&ichan->lock, flags); |
876 | ||
8d47bae0 GL |
877 | if (ret < 0) { |
878 | cookie = ret; | |
879 | goto dequeue; | |
880 | } | |
881 | ||
5296b56d | 882 | if (ichan->status < IPU_CHANNEL_ENABLED) { |
8d47bae0 | 883 | ret = ipu_enable_channel(idmac, ichan); |
5296b56d GL |
884 | if (ret < 0) { |
885 | cookie = ret; | |
8d47bae0 | 886 | goto dequeue; |
5296b56d GL |
887 | } |
888 | } | |
889 | ||
890 | dump_idmac_reg(ipu); | |
891 | ||
8d47bae0 GL |
892 | dequeue: |
893 | if (cookie < 0) { | |
894 | spin_lock_irqsave(&ichan->lock, flags); | |
895 | list_del_init(&desc->list); | |
896 | spin_unlock_irqrestore(&ichan->lock, flags); | |
897 | tx->cookie = cookie; | |
898 | ichan->dma_chan.cookie = cookie; | |
899 | } | |
900 | ||
5296b56d GL |
901 | out: |
902 | mutex_unlock(&ichan->chan_mutex); | |
903 | ||
904 | return cookie; | |
905 | } | |
906 | ||
907 | /* Called with ichan->chan_mutex held */ | |
908 | static int idmac_desc_alloc(struct idmac_channel *ichan, int n) | |
909 | { | |
42bc47b3 KC |
910 | struct idmac_tx_desc *desc = |
911 | vmalloc(array_size(n, sizeof(struct idmac_tx_desc))); | |
5296b56d GL |
912 | struct idmac *idmac = to_idmac(ichan->dma_chan.device); |
913 | ||
914 | if (!desc) | |
915 | return -ENOMEM; | |
916 | ||
917 | /* No interrupts, just disable the tasklet for a moment */ | |
918 | tasklet_disable(&to_ipu(idmac)->tasklet); | |
919 | ||
920 | ichan->n_tx_desc = n; | |
921 | ichan->desc = desc; | |
922 | INIT_LIST_HEAD(&ichan->queue); | |
923 | INIT_LIST_HEAD(&ichan->free_list); | |
924 | ||
925 | while (n--) { | |
926 | struct dma_async_tx_descriptor *txd = &desc->txd; | |
927 | ||
928 | memset(txd, 0, sizeof(*txd)); | |
929 | dma_async_tx_descriptor_init(txd, &ichan->dma_chan); | |
930 | txd->tx_submit = idmac_tx_submit; | |
5296b56d GL |
931 | |
932 | list_add(&desc->list, &ichan->free_list); | |
933 | ||
934 | desc++; | |
935 | } | |
936 | ||
937 | tasklet_enable(&to_ipu(idmac)->tasklet); | |
938 | ||
939 | return 0; | |
940 | } | |
941 | ||
942 | /** | |
943 | * ipu_init_channel() - initialize an IPU channel. | |
944 | * @idmac: IPU DMAC context. | |
945 | * @ichan: pointer to the channel object. | |
946 | * @return 0 on success or negative error code on failure. | |
947 | */ | |
948 | static int ipu_init_channel(struct idmac *idmac, struct idmac_channel *ichan) | |
949 | { | |
950 | union ipu_channel_param *params = &ichan->params; | |
951 | uint32_t ipu_conf; | |
952 | enum ipu_channel channel = ichan->dma_chan.chan_id; | |
953 | unsigned long flags; | |
954 | uint32_t reg; | |
955 | struct ipu *ipu = to_ipu(idmac); | |
956 | int ret = 0, n_desc = 0; | |
957 | ||
958 | dev_dbg(ipu->dev, "init channel = %d\n", channel); | |
959 | ||
960 | if (channel != IDMAC_SDC_0 && channel != IDMAC_SDC_1 && | |
961 | channel != IDMAC_IC_7) | |
962 | return -EINVAL; | |
963 | ||
964 | spin_lock_irqsave(&ipu->lock, flags); | |
965 | ||
966 | switch (channel) { | |
967 | case IDMAC_IC_7: | |
968 | n_desc = 16; | |
969 | reg = idmac_read_icreg(ipu, IC_CONF); | |
970 | idmac_write_icreg(ipu, reg & ~IC_CONF_CSI_MEM_WR_EN, IC_CONF); | |
971 | break; | |
972 | case IDMAC_IC_0: | |
973 | n_desc = 16; | |
974 | reg = idmac_read_ipureg(ipu, IPU_FS_PROC_FLOW); | |
975 | idmac_write_ipureg(ipu, reg & ~FS_ENC_IN_VALID, IPU_FS_PROC_FLOW); | |
976 | ret = ipu_ic_init_prpenc(ipu, params, true); | |
977 | break; | |
978 | case IDMAC_SDC_0: | |
979 | case IDMAC_SDC_1: | |
980 | n_desc = 4; | |
981 | default: | |
982 | break; | |
983 | } | |
984 | ||
985 | ipu->channel_init_mask |= 1L << channel; | |
986 | ||
987 | /* Enable IPU sub module */ | |
988 | ipu_conf = idmac_read_ipureg(ipu, IPU_CONF) | | |
989 | ipu_channel_conf_mask(channel); | |
990 | idmac_write_ipureg(ipu, ipu_conf, IPU_CONF); | |
991 | ||
992 | spin_unlock_irqrestore(&ipu->lock, flags); | |
993 | ||
994 | if (n_desc && !ichan->desc) | |
995 | ret = idmac_desc_alloc(ichan, n_desc); | |
996 | ||
997 | dump_idmac_reg(ipu); | |
998 | ||
999 | return ret; | |
1000 | } | |
1001 | ||
1002 | /** | |
1003 | * ipu_uninit_channel() - uninitialize an IPU channel. | |
1004 | * @idmac: IPU DMAC context. | |
1005 | * @ichan: pointer to the channel object. | |
1006 | */ | |
1007 | static void ipu_uninit_channel(struct idmac *idmac, struct idmac_channel *ichan) | |
1008 | { | |
1009 | enum ipu_channel channel = ichan->dma_chan.chan_id; | |
1010 | unsigned long flags; | |
1011 | uint32_t reg; | |
1012 | unsigned long chan_mask = 1UL << channel; | |
1013 | uint32_t ipu_conf; | |
1014 | struct ipu *ipu = to_ipu(idmac); | |
1015 | ||
1016 | spin_lock_irqsave(&ipu->lock, flags); | |
1017 | ||
1018 | if (!(ipu->channel_init_mask & chan_mask)) { | |
1019 | dev_err(ipu->dev, "Channel already uninitialized %d\n", | |
1020 | channel); | |
1021 | spin_unlock_irqrestore(&ipu->lock, flags); | |
1022 | return; | |
1023 | } | |
1024 | ||
1025 | /* Reset the double buffer */ | |
1026 | reg = idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL); | |
1027 | idmac_write_ipureg(ipu, reg & ~chan_mask, IPU_CHA_DB_MODE_SEL); | |
1028 | ||
1029 | ichan->sec_chan_en = false; | |
1030 | ||
1031 | switch (channel) { | |
1032 | case IDMAC_IC_7: | |
1033 | reg = idmac_read_icreg(ipu, IC_CONF); | |
1034 | idmac_write_icreg(ipu, reg & ~(IC_CONF_RWS_EN | IC_CONF_PRPENC_EN), | |
1035 | IC_CONF); | |
1036 | break; | |
1037 | case IDMAC_IC_0: | |
1038 | reg = idmac_read_icreg(ipu, IC_CONF); | |
1039 | idmac_write_icreg(ipu, reg & ~(IC_CONF_PRPENC_EN | IC_CONF_PRPENC_CSC1), | |
1040 | IC_CONF); | |
1041 | break; | |
1042 | case IDMAC_SDC_0: | |
1043 | case IDMAC_SDC_1: | |
1044 | default: | |
1045 | break; | |
1046 | } | |
1047 | ||
1048 | ipu->channel_init_mask &= ~(1L << channel); | |
1049 | ||
1050 | ipu_conf = idmac_read_ipureg(ipu, IPU_CONF) & | |
1051 | ~ipu_channel_conf_mask(channel); | |
1052 | idmac_write_ipureg(ipu, ipu_conf, IPU_CONF); | |
1053 | ||
1054 | spin_unlock_irqrestore(&ipu->lock, flags); | |
1055 | ||
1056 | ichan->n_tx_desc = 0; | |
1057 | vfree(ichan->desc); | |
1058 | ichan->desc = NULL; | |
1059 | } | |
1060 | ||
1061 | /** | |
1062 | * ipu_disable_channel() - disable an IPU channel. | |
1063 | * @idmac: IPU DMAC context. | |
1064 | * @ichan: channel object pointer. | |
1065 | * @wait_for_stop: flag to set whether to wait for channel end of frame or | |
1066 | * return immediately. | |
1067 | * @return: 0 on success or negative error code on failure. | |
1068 | */ | |
1069 | static int ipu_disable_channel(struct idmac *idmac, struct idmac_channel *ichan, | |
1070 | bool wait_for_stop) | |
1071 | { | |
1072 | enum ipu_channel channel = ichan->dma_chan.chan_id; | |
1073 | struct ipu *ipu = to_ipu(idmac); | |
1074 | uint32_t reg; | |
1075 | unsigned long flags; | |
1076 | unsigned long chan_mask = 1UL << channel; | |
1077 | unsigned int timeout; | |
1078 | ||
1079 | if (wait_for_stop && channel != IDMAC_SDC_1 && channel != IDMAC_SDC_0) { | |
1080 | timeout = 40; | |
1081 | /* This waiting always fails. Related to spurious irq problem */ | |
1082 | while ((idmac_read_icreg(ipu, IDMAC_CHA_BUSY) & chan_mask) || | |
1083 | (ipu_channel_status(ipu, channel) == TASK_STAT_ACTIVE)) { | |
1084 | timeout--; | |
1085 | msleep(10); | |
1086 | ||
1087 | if (!timeout) { | |
1088 | dev_dbg(ipu->dev, | |
1089 | "Warning: timeout waiting for channel %u to " | |
1090 | "stop: buf0_rdy = 0x%08X, buf1_rdy = 0x%08X, " | |
1091 | "busy = 0x%08X, tstat = 0x%08X\n", channel, | |
1092 | idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY), | |
1093 | idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY), | |
1094 | idmac_read_icreg(ipu, IDMAC_CHA_BUSY), | |
1095 | idmac_read_ipureg(ipu, IPU_TASKS_STAT)); | |
1096 | break; | |
1097 | } | |
1098 | } | |
1099 | dev_dbg(ipu->dev, "timeout = %d * 10ms\n", 40 - timeout); | |
1100 | } | |
1101 | /* SDC BG and FG must be disabled before DMA is disabled */ | |
1102 | if (wait_for_stop && (channel == IDMAC_SDC_0 || | |
1103 | channel == IDMAC_SDC_1)) { | |
1104 | for (timeout = 5; | |
1105 | timeout && !ipu_irq_status(ichan->eof_irq); timeout--) | |
1106 | msleep(5); | |
1107 | } | |
1108 | ||
1109 | spin_lock_irqsave(&ipu->lock, flags); | |
1110 | ||
1111 | /* Disable IC task */ | |
1112 | ipu_ic_disable_task(ipu, channel); | |
1113 | ||
1114 | /* Disable DMA channel(s) */ | |
1115 | reg = idmac_read_icreg(ipu, IDMAC_CHA_EN); | |
1116 | idmac_write_icreg(ipu, reg & ~chan_mask, IDMAC_CHA_EN); | |
1117 | ||
5296b56d GL |
1118 | spin_unlock_irqrestore(&ipu->lock, flags); |
1119 | ||
1120 | return 0; | |
1121 | } | |
1122 | ||
8d47bae0 GL |
1123 | static struct scatterlist *idmac_sg_next(struct idmac_channel *ichan, |
1124 | struct idmac_tx_desc **desc, struct scatterlist *sg) | |
1125 | { | |
1126 | struct scatterlist *sgnew = sg ? sg_next(sg) : NULL; | |
1127 | ||
1128 | if (sgnew) | |
1129 | /* next sg-element in this list */ | |
1130 | return sgnew; | |
1131 | ||
1132 | if ((*desc)->list.next == &ichan->queue) | |
1133 | /* No more descriptors on the queue */ | |
1134 | return NULL; | |
1135 | ||
1136 | /* Fetch next descriptor */ | |
1137 | *desc = list_entry((*desc)->list.next, struct idmac_tx_desc, list); | |
1138 | return (*desc)->sg; | |
1139 | } | |
1140 | ||
5296b56d GL |
1141 | /* |
1142 | * We have several possibilities here: | |
1143 | * current BUF next BUF | |
1144 | * | |
1145 | * not last sg next not last sg | |
1146 | * not last sg next last sg | |
1147 | * last sg first sg from next descriptor | |
1148 | * last sg NULL | |
1149 | * | |
1150 | * Besides, the descriptor queue might be empty or not. We process all these | |
1151 | * cases carefully. | |
1152 | */ | |
1153 | static irqreturn_t idmac_interrupt(int irq, void *dev_id) | |
1154 | { | |
1155 | struct idmac_channel *ichan = dev_id; | |
8d47bae0 | 1156 | struct device *dev = &ichan->dma_chan.dev->device; |
5296b56d GL |
1157 | unsigned int chan_id = ichan->dma_chan.chan_id; |
1158 | struct scatterlist **sg, *sgnext, *sgnew = NULL; | |
1159 | /* Next transfer descriptor */ | |
8d47bae0 | 1160 | struct idmac_tx_desc *desc, *descnew; |
5296b56d | 1161 | bool done = false; |
8d47bae0 GL |
1162 | u32 ready0, ready1, curbuf, err; |
1163 | unsigned long flags; | |
80a7d643 | 1164 | struct dmaengine_desc_callback cb; |
5296b56d GL |
1165 | |
1166 | /* IDMAC has cleared the respective BUFx_RDY bit, we manage the buffer */ | |
1167 | ||
8d47bae0 GL |
1168 | dev_dbg(dev, "IDMAC irq %d, buf %d\n", irq, ichan->active_buffer); |
1169 | ||
1170 | spin_lock_irqsave(&ipu_data.lock, flags); | |
1171 | ||
1172 | ready0 = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF0_RDY); | |
1173 | ready1 = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF1_RDY); | |
1174 | curbuf = idmac_read_ipureg(&ipu_data, IPU_CHA_CUR_BUF); | |
1175 | err = idmac_read_ipureg(&ipu_data, IPU_INT_STAT_4); | |
1176 | ||
1177 | if (err & (1 << chan_id)) { | |
1178 | idmac_write_ipureg(&ipu_data, 1 << chan_id, IPU_INT_STAT_4); | |
1179 | spin_unlock_irqrestore(&ipu_data.lock, flags); | |
1180 | /* | |
1181 | * Doing this | |
1182 | * ichan->sg[0] = ichan->sg[1] = NULL; | |
1183 | * you can force channel re-enable on the next tx_submit(), but | |
1184 | * this is dirty - think about descriptors with multiple | |
1185 | * sg elements. | |
1186 | */ | |
1187 | dev_warn(dev, "NFB4EOF on channel %d, ready %x, %x, cur %x\n", | |
1188 | chan_id, ready0, ready1, curbuf); | |
1189 | return IRQ_HANDLED; | |
1190 | } | |
1191 | spin_unlock_irqrestore(&ipu_data.lock, flags); | |
1192 | ||
5296b56d GL |
1193 | /* Other interrupts do not interfere with this channel */ |
1194 | spin_lock(&ichan->lock); | |
5296b56d GL |
1195 | if (unlikely((ichan->active_buffer && (ready1 >> chan_id) & 1) || |
1196 | (!ichan->active_buffer && (ready0 >> chan_id) & 1) | |
1197 | )) { | |
1198 | spin_unlock(&ichan->lock); | |
8d47bae0 | 1199 | dev_dbg(dev, |
5296b56d GL |
1200 | "IRQ with active buffer still ready on channel %x, " |
1201 | "active %d, ready %x, %x!\n", chan_id, | |
1202 | ichan->active_buffer, ready0, ready1); | |
1203 | return IRQ_NONE; | |
1204 | } | |
1205 | ||
1206 | if (unlikely(list_empty(&ichan->queue))) { | |
8d47bae0 | 1207 | ichan->sg[ichan->active_buffer] = NULL; |
5296b56d | 1208 | spin_unlock(&ichan->lock); |
8d47bae0 | 1209 | dev_err(dev, |
5296b56d GL |
1210 | "IRQ without queued buffers on channel %x, active %d, " |
1211 | "ready %x, %x!\n", chan_id, | |
1212 | ichan->active_buffer, ready0, ready1); | |
1213 | return IRQ_NONE; | |
1214 | } | |
1215 | ||
1216 | /* | |
1217 | * active_buffer is a software flag, it shows which buffer we are | |
1218 | * currently expecting back from the hardware, IDMAC should be | |
1219 | * processing the other buffer already | |
1220 | */ | |
1221 | sg = &ichan->sg[ichan->active_buffer]; | |
1222 | sgnext = ichan->sg[!ichan->active_buffer]; | |
1223 | ||
8d47bae0 GL |
1224 | if (!*sg) { |
1225 | spin_unlock(&ichan->lock); | |
1226 | return IRQ_HANDLED; | |
1227 | } | |
1228 | ||
1229 | desc = list_entry(ichan->queue.next, struct idmac_tx_desc, list); | |
1230 | descnew = desc; | |
1231 | ||
40911c7d OJ |
1232 | dev_dbg(dev, "IDMAC irq %d, dma %#llx, next dma %#llx, current %d, curbuf %#x\n", |
1233 | irq, (u64)sg_dma_address(*sg), | |
1234 | sgnext ? (u64)sg_dma_address(sgnext) : 0, | |
1235 | ichan->active_buffer, curbuf); | |
8d47bae0 GL |
1236 | |
1237 | /* Find the descriptor of sgnext */ | |
1238 | sgnew = idmac_sg_next(ichan, &descnew, *sg); | |
1239 | if (sgnext != sgnew) | |
1240 | dev_err(dev, "Submitted buffer %p, next buffer %p\n", sgnext, sgnew); | |
1241 | ||
5296b56d GL |
1242 | /* |
1243 | * if sgnext == NULL sg must be the last element in a scatterlist and | |
1244 | * queue must be empty | |
1245 | */ | |
1246 | if (unlikely(!sgnext)) { | |
8d47bae0 GL |
1247 | if (!WARN_ON(sg_next(*sg))) |
1248 | dev_dbg(dev, "Underrun on channel %x\n", chan_id); | |
1249 | ichan->sg[!ichan->active_buffer] = sgnew; | |
1250 | ||
1251 | if (unlikely(sgnew)) { | |
1252 | ipu_submit_buffer(ichan, descnew, sgnew, !ichan->active_buffer); | |
5296b56d | 1253 | } else { |
8d47bae0 | 1254 | spin_lock_irqsave(&ipu_data.lock, flags); |
5296b56d | 1255 | ipu_ic_disable_task(&ipu_data, chan_id); |
8d47bae0 | 1256 | spin_unlock_irqrestore(&ipu_data.lock, flags); |
5296b56d GL |
1257 | ichan->status = IPU_CHANNEL_READY; |
1258 | /* Continue to check for complete descriptor */ | |
1259 | } | |
1260 | } | |
1261 | ||
8d47bae0 GL |
1262 | /* Calculate and submit the next sg element */ |
1263 | sgnew = idmac_sg_next(ichan, &descnew, sgnew); | |
5296b56d GL |
1264 | |
1265 | if (unlikely(!sg_next(*sg)) || !sgnext) { | |
1266 | /* | |
1267 | * Last element in scatterlist done, remove from the queue, | |
1268 | * _init for debugging | |
1269 | */ | |
1270 | list_del_init(&desc->list); | |
1271 | done = true; | |
1272 | } | |
1273 | ||
1274 | *sg = sgnew; | |
1275 | ||
8d47bae0 GL |
1276 | if (likely(sgnew) && |
1277 | ipu_submit_buffer(ichan, descnew, sgnew, ichan->active_buffer) < 0) { | |
80a7d643 DJ |
1278 | dmaengine_desc_get_callback(&descnew->txd, &cb); |
1279 | ||
1d3564d9 | 1280 | list_del_init(&descnew->list); |
8d47bae0 | 1281 | spin_unlock(&ichan->lock); |
80a7d643 DJ |
1282 | |
1283 | dmaengine_desc_callback_invoke(&cb, NULL); | |
8d47bae0 | 1284 | spin_lock(&ichan->lock); |
5296b56d GL |
1285 | } |
1286 | ||
1287 | /* Flip the active buffer - even if update above failed */ | |
1288 | ichan->active_buffer = !ichan->active_buffer; | |
1289 | if (done) | |
f7fbce07 | 1290 | dma_cookie_complete(&desc->txd); |
5296b56d | 1291 | |
80a7d643 | 1292 | dmaengine_desc_get_callback(&desc->txd, &cb); |
5296b56d GL |
1293 | |
1294 | spin_unlock(&ichan->lock); | |
1295 | ||
80a7d643 DJ |
1296 | if (done && (desc->txd.flags & DMA_PREP_INTERRUPT)) |
1297 | dmaengine_desc_callback_invoke(&cb, NULL); | |
5296b56d GL |
1298 | |
1299 | return IRQ_HANDLED; | |
1300 | } | |
1301 | ||
1302 | static void ipu_gc_tasklet(unsigned long arg) | |
1303 | { | |
1304 | struct ipu *ipu = (struct ipu *)arg; | |
1305 | int i; | |
1306 | ||
1307 | for (i = 0; i < IPU_CHANNELS_NUM; i++) { | |
1308 | struct idmac_channel *ichan = ipu->channel + i; | |
1309 | struct idmac_tx_desc *desc; | |
1310 | unsigned long flags; | |
8d47bae0 GL |
1311 | struct scatterlist *sg; |
1312 | int j, k; | |
5296b56d GL |
1313 | |
1314 | for (j = 0; j < ichan->n_tx_desc; j++) { | |
1315 | desc = ichan->desc + j; | |
1316 | spin_lock_irqsave(&ichan->lock, flags); | |
1317 | if (async_tx_test_ack(&desc->txd)) { | |
1318 | list_move(&desc->list, &ichan->free_list); | |
8d47bae0 GL |
1319 | for_each_sg(desc->sg, sg, desc->sg_len, k) { |
1320 | if (ichan->sg[0] == sg) | |
1321 | ichan->sg[0] = NULL; | |
1322 | else if (ichan->sg[1] == sg) | |
1323 | ichan->sg[1] = NULL; | |
1324 | } | |
5296b56d GL |
1325 | async_tx_clear_ack(&desc->txd); |
1326 | } | |
1327 | spin_unlock_irqrestore(&ichan->lock, flags); | |
1328 | } | |
1329 | } | |
1330 | } | |
1331 | ||
0149f7d5 | 1332 | /* Allocate and initialise a transfer descriptor. */ |
5296b56d GL |
1333 | static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan, |
1334 | struct scatterlist *sgl, unsigned int sg_len, | |
185ecb5f AB |
1335 | enum dma_transfer_direction direction, unsigned long tx_flags, |
1336 | void *context) | |
5296b56d GL |
1337 | { |
1338 | struct idmac_channel *ichan = to_idmac_chan(chan); | |
1339 | struct idmac_tx_desc *desc = NULL; | |
1340 | struct dma_async_tx_descriptor *txd = NULL; | |
1341 | unsigned long flags; | |
1342 | ||
1343 | /* We only can handle these three channels so far */ | |
8c6db1bb GL |
1344 | if (chan->chan_id != IDMAC_SDC_0 && chan->chan_id != IDMAC_SDC_1 && |
1345 | chan->chan_id != IDMAC_IC_7) | |
5296b56d GL |
1346 | return NULL; |
1347 | ||
5127c4f8 | 1348 | if (!is_slave_direction(direction)) { |
5296b56d GL |
1349 | dev_err(chan->device->dev, "Invalid DMA direction %d!\n", direction); |
1350 | return NULL; | |
1351 | } | |
1352 | ||
1353 | mutex_lock(&ichan->chan_mutex); | |
1354 | ||
1355 | spin_lock_irqsave(&ichan->lock, flags); | |
1356 | if (!list_empty(&ichan->free_list)) { | |
1357 | desc = list_entry(ichan->free_list.next, | |
1358 | struct idmac_tx_desc, list); | |
1359 | ||
1360 | list_del_init(&desc->list); | |
1361 | ||
1362 | desc->sg_len = sg_len; | |
1363 | desc->sg = sgl; | |
1364 | txd = &desc->txd; | |
1365 | txd->flags = tx_flags; | |
1366 | } | |
1367 | spin_unlock_irqrestore(&ichan->lock, flags); | |
1368 | ||
1369 | mutex_unlock(&ichan->chan_mutex); | |
1370 | ||
1371 | tasklet_schedule(&to_ipu(to_idmac(chan->device))->tasklet); | |
1372 | ||
1373 | return txd; | |
1374 | } | |
1375 | ||
1376 | /* Re-select the current buffer and re-activate the channel */ | |
1377 | static void idmac_issue_pending(struct dma_chan *chan) | |
1378 | { | |
1379 | struct idmac_channel *ichan = to_idmac_chan(chan); | |
1380 | struct idmac *idmac = to_idmac(chan->device); | |
1381 | struct ipu *ipu = to_ipu(idmac); | |
1382 | unsigned long flags; | |
1383 | ||
1384 | /* This is not always needed, but doesn't hurt either */ | |
1385 | spin_lock_irqsave(&ipu->lock, flags); | |
8c6db1bb | 1386 | ipu_select_buffer(chan->chan_id, ichan->active_buffer); |
5296b56d GL |
1387 | spin_unlock_irqrestore(&ipu->lock, flags); |
1388 | ||
1389 | /* | |
1390 | * Might need to perform some parts of initialisation from | |
1391 | * ipu_enable_channel(), but not all, we do not want to reset to buffer | |
1392 | * 0, don't need to set priority again either, but re-enabling the task | |
1393 | * and the channel might be a good idea. | |
1394 | */ | |
1395 | } | |
1396 | ||
701c1edb | 1397 | static int idmac_pause(struct dma_chan *chan) |
5296b56d GL |
1398 | { |
1399 | struct idmac_channel *ichan = to_idmac_chan(chan); | |
1400 | struct idmac *idmac = to_idmac(chan->device); | |
1d3564d9 GL |
1401 | struct ipu *ipu = to_ipu(idmac); |
1402 | struct list_head *list, *tmp; | |
5296b56d | 1403 | unsigned long flags; |
5296b56d | 1404 | |
701c1edb | 1405 | mutex_lock(&ichan->chan_mutex); |
c3635c78 | 1406 | |
701c1edb MR |
1407 | spin_lock_irqsave(&ipu->lock, flags); |
1408 | ipu_ic_disable_task(ipu, chan->chan_id); | |
5296b56d | 1409 | |
701c1edb MR |
1410 | /* Return all descriptors into "prepared" state */ |
1411 | list_for_each_safe(list, tmp, &ichan->queue) | |
1412 | list_del_init(list); | |
5296b56d | 1413 | |
701c1edb MR |
1414 | ichan->sg[0] = NULL; |
1415 | ichan->sg[1] = NULL; | |
5296b56d | 1416 | |
701c1edb | 1417 | spin_unlock_irqrestore(&ipu->lock, flags); |
5296b56d | 1418 | |
701c1edb | 1419 | ichan->status = IPU_CHANNEL_INITIALIZED; |
5296b56d | 1420 | |
701c1edb | 1421 | mutex_unlock(&ichan->chan_mutex); |
5296b56d | 1422 | |
701c1edb MR |
1423 | return 0; |
1424 | } | |
5296b56d | 1425 | |
701c1edb MR |
1426 | static int __idmac_terminate_all(struct dma_chan *chan) |
1427 | { | |
1428 | struct idmac_channel *ichan = to_idmac_chan(chan); | |
1429 | struct idmac *idmac = to_idmac(chan->device); | |
1430 | struct ipu *ipu = to_ipu(idmac); | |
1431 | unsigned long flags; | |
1432 | int i; | |
1d3564d9 | 1433 | |
701c1edb MR |
1434 | ipu_disable_channel(idmac, ichan, |
1435 | ichan->status >= IPU_CHANNEL_ENABLED); | |
1d3564d9 | 1436 | |
701c1edb | 1437 | tasklet_disable(&ipu->tasklet); |
1d3564d9 | 1438 | |
701c1edb MR |
1439 | /* ichan->queue is modified in ISR, have to spinlock */ |
1440 | spin_lock_irqsave(&ichan->lock, flags); | |
1441 | list_splice_init(&ichan->queue, &ichan->free_list); | |
1442 | ||
1443 | if (ichan->desc) | |
1444 | for (i = 0; i < ichan->n_tx_desc; i++) { | |
1445 | struct idmac_tx_desc *desc = ichan->desc + i; | |
1446 | if (list_empty(&desc->list)) | |
1447 | /* Descriptor was prepared, but not submitted */ | |
1448 | list_add(&desc->list, &ichan->free_list); | |
1449 | ||
1450 | async_tx_clear_ack(&desc->txd); | |
1451 | } | |
1452 | ||
1453 | ichan->sg[0] = NULL; | |
1454 | ichan->sg[1] = NULL; | |
1455 | spin_unlock_irqrestore(&ichan->lock, flags); | |
1456 | ||
1457 | tasklet_enable(&ipu->tasklet); | |
1458 | ||
1459 | ichan->status = IPU_CHANNEL_INITIALIZED; | |
c3635c78 LW |
1460 | |
1461 | return 0; | |
5296b56d GL |
1462 | } |
1463 | ||
701c1edb | 1464 | static int idmac_terminate_all(struct dma_chan *chan) |
5296b56d GL |
1465 | { |
1466 | struct idmac_channel *ichan = to_idmac_chan(chan); | |
c3635c78 | 1467 | int ret; |
5296b56d GL |
1468 | |
1469 | mutex_lock(&ichan->chan_mutex); | |
1470 | ||
701c1edb | 1471 | ret = __idmac_terminate_all(chan); |
5296b56d GL |
1472 | |
1473 | mutex_unlock(&ichan->chan_mutex); | |
c3635c78 LW |
1474 | |
1475 | return ret; | |
5296b56d GL |
1476 | } |
1477 | ||
8c6db1bb GL |
1478 | #ifdef DEBUG |
1479 | static irqreturn_t ic_sof_irq(int irq, void *dev_id) | |
1480 | { | |
1481 | struct idmac_channel *ichan = dev_id; | |
1482 | printk(KERN_DEBUG "Got SOF IRQ %d on Channel %d\n", | |
1483 | irq, ichan->dma_chan.chan_id); | |
ca50a51e | 1484 | disable_irq_nosync(irq); |
8c6db1bb GL |
1485 | return IRQ_HANDLED; |
1486 | } | |
1487 | ||
1488 | static irqreturn_t ic_eof_irq(int irq, void *dev_id) | |
1489 | { | |
1490 | struct idmac_channel *ichan = dev_id; | |
1491 | printk(KERN_DEBUG "Got EOF IRQ %d on Channel %d\n", | |
1492 | irq, ichan->dma_chan.chan_id); | |
ca50a51e | 1493 | disable_irq_nosync(irq); |
8c6db1bb GL |
1494 | return IRQ_HANDLED; |
1495 | } | |
1496 | ||
1497 | static int ic_sof = -EINVAL, ic_eof = -EINVAL; | |
1498 | #endif | |
1499 | ||
5296b56d GL |
1500 | static int idmac_alloc_chan_resources(struct dma_chan *chan) |
1501 | { | |
1502 | struct idmac_channel *ichan = to_idmac_chan(chan); | |
1503 | struct idmac *idmac = to_idmac(chan->device); | |
1504 | int ret; | |
1505 | ||
1506 | /* dmaengine.c now guarantees to only offer free channels */ | |
1507 | BUG_ON(chan->client_count > 1); | |
1508 | WARN_ON(ichan->status != IPU_CHANNEL_FREE); | |
1509 | ||
d3ee98cd | 1510 | dma_cookie_init(chan); |
5296b56d | 1511 | |
8c6db1bb | 1512 | ret = ipu_irq_map(chan->chan_id); |
5296b56d GL |
1513 | if (ret < 0) |
1514 | goto eimap; | |
1515 | ||
1516 | ichan->eof_irq = ret; | |
8d47bae0 GL |
1517 | |
1518 | /* | |
1519 | * Important to first disable the channel, because maybe someone | |
1520 | * used it before us, e.g., the bootloader | |
1521 | */ | |
1522 | ipu_disable_channel(idmac, ichan, true); | |
5296b56d GL |
1523 | |
1524 | ret = ipu_init_channel(idmac, ichan); | |
1525 | if (ret < 0) | |
1526 | goto eichan; | |
1527 | ||
5296b56d GL |
1528 | ret = request_irq(ichan->eof_irq, idmac_interrupt, 0, |
1529 | ichan->eof_name, ichan); | |
1530 | if (ret < 0) | |
1531 | goto erirq; | |
1532 | ||
8c6db1bb GL |
1533 | #ifdef DEBUG |
1534 | if (chan->chan_id == IDMAC_IC_7) { | |
1535 | ic_sof = ipu_irq_map(69); | |
37a746aa VK |
1536 | if (ic_sof > 0) { |
1537 | ret = request_irq(ic_sof, ic_sof_irq, 0, "IC SOF", ichan); | |
1538 | if (ret) | |
1539 | dev_err(&chan->dev->device, "request irq failed for IC SOF"); | |
1540 | } | |
8c6db1bb | 1541 | ic_eof = ipu_irq_map(70); |
37a746aa VK |
1542 | if (ic_eof > 0) { |
1543 | ret = request_irq(ic_eof, ic_eof_irq, 0, "IC EOF", ichan); | |
1544 | if (ret) | |
1545 | dev_err(&chan->dev->device, "request irq failed for IC EOF"); | |
1546 | } | |
8c6db1bb GL |
1547 | } |
1548 | #endif | |
5296b56d GL |
1549 | |
1550 | ichan->status = IPU_CHANNEL_INITIALIZED; | |
1551 | ||
8c6db1bb GL |
1552 | dev_dbg(&chan->dev->device, "Found channel 0x%x, irq %d\n", |
1553 | chan->chan_id, ichan->eof_irq); | |
5296b56d GL |
1554 | |
1555 | return ret; | |
1556 | ||
5296b56d | 1557 | erirq: |
8d47bae0 GL |
1558 | ipu_uninit_channel(idmac, ichan); |
1559 | eichan: | |
8c6db1bb | 1560 | ipu_irq_unmap(chan->chan_id); |
5296b56d GL |
1561 | eimap: |
1562 | return ret; | |
1563 | } | |
1564 | ||
1565 | static void idmac_free_chan_resources(struct dma_chan *chan) | |
1566 | { | |
1567 | struct idmac_channel *ichan = to_idmac_chan(chan); | |
1568 | struct idmac *idmac = to_idmac(chan->device); | |
1569 | ||
1570 | mutex_lock(&ichan->chan_mutex); | |
1571 | ||
701c1edb | 1572 | __idmac_terminate_all(chan); |
5296b56d GL |
1573 | |
1574 | if (ichan->status > IPU_CHANNEL_FREE) { | |
8c6db1bb GL |
1575 | #ifdef DEBUG |
1576 | if (chan->chan_id == IDMAC_IC_7) { | |
1577 | if (ic_sof > 0) { | |
1578 | free_irq(ic_sof, ichan); | |
1579 | ipu_irq_unmap(69); | |
1580 | ic_sof = -EINVAL; | |
1581 | } | |
1582 | if (ic_eof > 0) { | |
1583 | free_irq(ic_eof, ichan); | |
1584 | ipu_irq_unmap(70); | |
1585 | ic_eof = -EINVAL; | |
1586 | } | |
1587 | } | |
1588 | #endif | |
5296b56d | 1589 | free_irq(ichan->eof_irq, ichan); |
8c6db1bb | 1590 | ipu_irq_unmap(chan->chan_id); |
5296b56d GL |
1591 | } |
1592 | ||
1593 | ichan->status = IPU_CHANNEL_FREE; | |
1594 | ||
1595 | ipu_uninit_channel(idmac, ichan); | |
1596 | ||
1597 | mutex_unlock(&ichan->chan_mutex); | |
1598 | ||
1599 | tasklet_schedule(&to_ipu(idmac)->tasklet); | |
1600 | } | |
1601 | ||
07934481 LW |
1602 | static enum dma_status idmac_tx_status(struct dma_chan *chan, |
1603 | dma_cookie_t cookie, struct dma_tx_state *txstate) | |
5296b56d | 1604 | { |
c6c732cf | 1605 | return dma_cookie_status(chan, cookie, txstate); |
5296b56d GL |
1606 | } |
1607 | ||
1608 | static int __init ipu_idmac_init(struct ipu *ipu) | |
1609 | { | |
1610 | struct idmac *idmac = &ipu->idmac; | |
1611 | struct dma_device *dma = &idmac->dma; | |
1612 | int i; | |
1613 | ||
1614 | dma_cap_set(DMA_SLAVE, dma->cap_mask); | |
1615 | dma_cap_set(DMA_PRIVATE, dma->cap_mask); | |
1616 | ||
1617 | /* Compulsory common fields */ | |
1618 | dma->dev = ipu->dev; | |
1619 | dma->device_alloc_chan_resources = idmac_alloc_chan_resources; | |
1620 | dma->device_free_chan_resources = idmac_free_chan_resources; | |
07934481 | 1621 | dma->device_tx_status = idmac_tx_status; |
5296b56d GL |
1622 | dma->device_issue_pending = idmac_issue_pending; |
1623 | ||
1624 | /* Compulsory for DMA_SLAVE fields */ | |
1625 | dma->device_prep_slave_sg = idmac_prep_slave_sg; | |
701c1edb MR |
1626 | dma->device_pause = idmac_pause; |
1627 | dma->device_terminate_all = idmac_terminate_all; | |
5296b56d GL |
1628 | |
1629 | INIT_LIST_HEAD(&dma->channels); | |
1630 | for (i = 0; i < IPU_CHANNELS_NUM; i++) { | |
1631 | struct idmac_channel *ichan = ipu->channel + i; | |
1632 | struct dma_chan *dma_chan = &ichan->dma_chan; | |
1633 | ||
1634 | spin_lock_init(&ichan->lock); | |
1635 | mutex_init(&ichan->chan_mutex); | |
1636 | ||
1637 | ichan->status = IPU_CHANNEL_FREE; | |
1638 | ichan->sec_chan_en = false; | |
5296b56d GL |
1639 | snprintf(ichan->eof_name, sizeof(ichan->eof_name), "IDMAC EOF %d", i); |
1640 | ||
1641 | dma_chan->device = &idmac->dma; | |
d3ee98cd | 1642 | dma_cookie_init(dma_chan); |
5296b56d | 1643 | dma_chan->chan_id = i; |
8c6db1bb | 1644 | list_add_tail(&dma_chan->device_node, &dma->channels); |
5296b56d GL |
1645 | } |
1646 | ||
1647 | idmac_write_icreg(ipu, 0x00000070, IDMAC_CONF); | |
1648 | ||
1649 | return dma_async_device_register(&idmac->dma); | |
1650 | } | |
1651 | ||
88ff6ab4 | 1652 | static void ipu_idmac_exit(struct ipu *ipu) |
5296b56d GL |
1653 | { |
1654 | int i; | |
1655 | struct idmac *idmac = &ipu->idmac; | |
1656 | ||
1657 | for (i = 0; i < IPU_CHANNELS_NUM; i++) { | |
1658 | struct idmac_channel *ichan = ipu->channel + i; | |
1659 | ||
701c1edb | 1660 | idmac_terminate_all(&ichan->dma_chan); |
5296b56d GL |
1661 | } |
1662 | ||
1663 | dma_async_device_unregister(&idmac->dma); | |
1664 | } | |
1665 | ||
1666 | /***************************************************************************** | |
1667 | * IPU common probe / remove | |
1668 | */ | |
1669 | ||
234f2df5 | 1670 | static int __init ipu_probe(struct platform_device *pdev) |
5296b56d | 1671 | { |
5296b56d GL |
1672 | struct resource *mem_ipu, *mem_ic; |
1673 | int ret; | |
1674 | ||
1675 | spin_lock_init(&ipu_data.lock); | |
1676 | ||
1677 | mem_ipu = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1678 | mem_ic = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
88289c80 | 1679 | if (!mem_ipu || !mem_ic) |
5296b56d GL |
1680 | return -EINVAL; |
1681 | ||
1682 | ipu_data.dev = &pdev->dev; | |
1683 | ||
1684 | platform_set_drvdata(pdev, &ipu_data); | |
1685 | ||
1686 | ret = platform_get_irq(pdev, 0); | |
1687 | if (ret < 0) | |
1688 | goto err_noirq; | |
1689 | ||
1690 | ipu_data.irq_fn = ret; | |
1691 | ret = platform_get_irq(pdev, 1); | |
1692 | if (ret < 0) | |
1693 | goto err_noirq; | |
1694 | ||
1695 | ipu_data.irq_err = ret; | |
5296b56d | 1696 | |
88289c80 SG |
1697 | dev_dbg(&pdev->dev, "fn irq %u, err irq %u\n", |
1698 | ipu_data.irq_fn, ipu_data.irq_err); | |
5296b56d GL |
1699 | |
1700 | /* Remap IPU common registers */ | |
7dab35c0 | 1701 | ipu_data.reg_ipu = ioremap(mem_ipu->start, resource_size(mem_ipu)); |
5296b56d GL |
1702 | if (!ipu_data.reg_ipu) { |
1703 | ret = -ENOMEM; | |
1704 | goto err_ioremap_ipu; | |
1705 | } | |
1706 | ||
1707 | /* Remap Image Converter and Image DMA Controller registers */ | |
7dab35c0 | 1708 | ipu_data.reg_ic = ioremap(mem_ic->start, resource_size(mem_ic)); |
5296b56d GL |
1709 | if (!ipu_data.reg_ic) { |
1710 | ret = -ENOMEM; | |
1711 | goto err_ioremap_ic; | |
1712 | } | |
1713 | ||
1714 | /* Get IPU clock */ | |
9eb2eb8c | 1715 | ipu_data.ipu_clk = clk_get(&pdev->dev, NULL); |
5296b56d GL |
1716 | if (IS_ERR(ipu_data.ipu_clk)) { |
1717 | ret = PTR_ERR(ipu_data.ipu_clk); | |
1718 | goto err_clk_get; | |
1719 | } | |
1720 | ||
1721 | /* Make sure IPU HSP clock is running */ | |
4fa030a4 | 1722 | clk_prepare_enable(ipu_data.ipu_clk); |
5296b56d GL |
1723 | |
1724 | /* Disable all interrupts */ | |
1725 | idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_1); | |
1726 | idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_2); | |
1727 | idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_3); | |
1728 | idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_4); | |
1729 | idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_5); | |
1730 | ||
1731 | dev_dbg(&pdev->dev, "%s @ 0x%08lx, fn irq %u, err irq %u\n", pdev->name, | |
1732 | (unsigned long)mem_ipu->start, ipu_data.irq_fn, ipu_data.irq_err); | |
1733 | ||
1734 | ret = ipu_irq_attach_irq(&ipu_data, pdev); | |
1735 | if (ret < 0) | |
1736 | goto err_attach_irq; | |
1737 | ||
1738 | /* Initialize DMA engine */ | |
1739 | ret = ipu_idmac_init(&ipu_data); | |
1740 | if (ret < 0) | |
1741 | goto err_idmac_init; | |
1742 | ||
1743 | tasklet_init(&ipu_data.tasklet, ipu_gc_tasklet, (unsigned long)&ipu_data); | |
1744 | ||
1745 | ipu_data.dev = &pdev->dev; | |
1746 | ||
1747 | dev_dbg(ipu_data.dev, "IPU initialized\n"); | |
1748 | ||
1749 | return 0; | |
1750 | ||
1751 | err_idmac_init: | |
1752 | err_attach_irq: | |
1753 | ipu_irq_detach_irq(&ipu_data, pdev); | |
4fa030a4 | 1754 | clk_disable_unprepare(ipu_data.ipu_clk); |
5296b56d GL |
1755 | clk_put(ipu_data.ipu_clk); |
1756 | err_clk_get: | |
1757 | iounmap(ipu_data.reg_ic); | |
1758 | err_ioremap_ic: | |
1759 | iounmap(ipu_data.reg_ipu); | |
1760 | err_ioremap_ipu: | |
1761 | err_noirq: | |
1762 | dev_err(&pdev->dev, "Failed to probe IPU: %d\n", ret); | |
1763 | return ret; | |
1764 | } | |
1765 | ||
1d1bbd30 | 1766 | static int ipu_remove(struct platform_device *pdev) |
5296b56d GL |
1767 | { |
1768 | struct ipu *ipu = platform_get_drvdata(pdev); | |
1769 | ||
1770 | ipu_idmac_exit(ipu); | |
1771 | ipu_irq_detach_irq(ipu, pdev); | |
4fa030a4 | 1772 | clk_disable_unprepare(ipu->ipu_clk); |
5296b56d GL |
1773 | clk_put(ipu->ipu_clk); |
1774 | iounmap(ipu->reg_ic); | |
1775 | iounmap(ipu->reg_ipu); | |
1776 | tasklet_kill(&ipu->tasklet); | |
5296b56d GL |
1777 | |
1778 | return 0; | |
1779 | } | |
1780 | ||
1781 | /* | |
1782 | * We need two MEM resources - with IPU-common and Image Converter registers, | |
1783 | * including PF_CONF and IDMAC_* registers, and two IRQs - function and error | |
1784 | */ | |
1785 | static struct platform_driver ipu_platform_driver = { | |
1786 | .driver = { | |
1787 | .name = "ipu-core", | |
5296b56d | 1788 | }, |
1d1bbd30 | 1789 | .remove = ipu_remove, |
5296b56d GL |
1790 | }; |
1791 | ||
1792 | static int __init ipu_init(void) | |
1793 | { | |
1794 | return platform_driver_probe(&ipu_platform_driver, ipu_probe); | |
1795 | } | |
1796 | subsys_initcall(ipu_init); | |
1797 | ||
1798 | MODULE_DESCRIPTION("IPU core driver"); | |
1799 | MODULE_LICENSE("GPL v2"); | |
1800 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
1801 | MODULE_ALIAS("platform:ipu-core"); |