1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
4 * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
5 */
6
7 #include <linux/export.h>
8 #include <linux/module.h>
9 #include <linux/types.h>
10 #include <linux/errno.h>
11 #include <linux/delay.h>
12 #include <linux/interrupt.h>
13 #include <linux/io.h>
14
15 #include <video/imx-ipu-v3.h>
16 #include "ipu-prv.h"
17
18 #define DC_MAP_CONF_PTR(n) (0x108 + ((n) & ~0x1) * 2)
19 #define DC_MAP_CONF_VAL(n) (0x144 + ((n) & ~0x1) * 2)
20
21 #define DC_EVT_NF 0
22 #define DC_EVT_NL 1
23 #define DC_EVT_EOF 2
24 #define DC_EVT_NFIELD 3
25 #define DC_EVT_EOL 4
26 #define DC_EVT_EOFIELD 5
27 #define DC_EVT_NEW_ADDR 6
28 #define DC_EVT_NEW_CHAN 7
29 #define DC_EVT_NEW_DATA 8
30
31 #define DC_EVT_NEW_ADDR_W_0 0
32 #define DC_EVT_NEW_ADDR_W_1 1
33 #define DC_EVT_NEW_CHAN_W_0 2
34 #define DC_EVT_NEW_CHAN_W_1 3
35 #define DC_EVT_NEW_DATA_W_0 4
36 #define DC_EVT_NEW_DATA_W_1 5
37 #define DC_EVT_NEW_ADDR_R_0 6
38 #define DC_EVT_NEW_ADDR_R_1 7
39 #define DC_EVT_NEW_CHAN_R_0 8
40 #define DC_EVT_NEW_CHAN_R_1 9
41 #define DC_EVT_NEW_DATA_R_0 10
42 #define DC_EVT_NEW_DATA_R_1 11
43
44 #define DC_WR_CH_CONF 0x0
45 #define DC_WR_CH_ADDR 0x4
46 #define DC_RL_CH(evt) (8 + ((evt) & ~0x1) * 2)
47
48 #define DC_GEN 0xd4
49 #define DC_DISP_CONF1(disp) (0xd8 + (disp) * 4)
50 #define DC_DISP_CONF2(disp) (0xe8 + (disp) * 4)
51 #define DC_STAT 0x1c8
52
53 #define WROD(lf) (0x18 | ((lf) << 1))
54 #define WRG 0x01
55 #define WCLK 0xc9
56
57 #define SYNC_WAVE 0
58 #define NULL_WAVE (-1)
59
60 #define DC_GEN_SYNC_1_6_SYNC (2 << 1)
61 #define DC_GEN_SYNC_PRIORITY_1 (1 << 7)
62
63 #define DC_WR_CH_CONF_WORD_SIZE_8 (0 << 0)
64 #define DC_WR_CH_CONF_WORD_SIZE_16 (1 << 0)
65 #define DC_WR_CH_CONF_WORD_SIZE_24 (2 << 0)
66 #define DC_WR_CH_CONF_WORD_SIZE_32 (3 << 0)
67 #define DC_WR_CH_CONF_DISP_ID_PARALLEL(i) (((i) & 0x1) << 3)
68 #define DC_WR_CH_CONF_DISP_ID_SERIAL (2 << 3)
69 #define DC_WR_CH_CONF_DISP_ID_ASYNC (3 << 4)
70 #define DC_WR_CH_CONF_FIELD_MODE (1 << 9)
71 #define DC_WR_CH_CONF_PROG_TYPE_NORMAL (4 << 5)
72 #define DC_WR_CH_CONF_PROG_TYPE_MASK (7 << 5)
73 #define DC_WR_CH_CONF_PROG_DI_ID (1 << 2)
74 #define DC_WR_CH_CONF_PROG_DISP_ID(i) (((i) & 0x1) << 3)
75
76 #define IPU_DC_NUM_CHANNELS 10
77
78 struct ipu_dc_priv;
79
80 enum ipu_dc_map {
81 IPU_DC_MAP_RGB24,
82 IPU_DC_MAP_RGB565,
83 IPU_DC_MAP_GBR24, /* TVEv2 */
84 IPU_DC_MAP_BGR666,
85 IPU_DC_MAP_LVDS666,
86 IPU_DC_MAP_BGR24,
87 };
88
89 struct ipu_dc {
90 /* The display interface number assigned to this dc channel */
91 unsigned int di;
92 void __iomem *base;
93 struct ipu_dc_priv *priv;
94 int chno;
95 bool in_use;
96 };
97
98 struct ipu_dc_priv {
99 void __iomem *dc_reg;
100 void __iomem *dc_tmpl_reg;
101 struct ipu_soc *ipu;
102 struct device *dev;
103 struct ipu_dc channels[IPU_DC_NUM_CHANNELS];
104 struct mutex mutex;
105 struct completion comp;
106 int use_count;
107 };
108
dc_link_event(struct ipu_dc * dc,int event,int addr,int priority)109 static void dc_link_event(struct ipu_dc *dc, int event, int addr, int priority)
110 {
111 u32 reg;
112
113 reg = readl(dc->base + DC_RL_CH(event));
114 reg &= ~(0xffff << (16 * (event & 0x1)));
115 reg |= ((addr << 8) | priority) << (16 * (event & 0x1));
116 writel(reg, dc->base + DC_RL_CH(event));
117 }
118
dc_write_tmpl(struct ipu_dc * dc,int word,u32 opcode,u32 operand,int map,int wave,int glue,int sync,int stop)119 static void dc_write_tmpl(struct ipu_dc *dc, int word, u32 opcode, u32 operand,
120 int map, int wave, int glue, int sync, int stop)
121 {
122 struct ipu_dc_priv *priv = dc->priv;
123 u32 reg1, reg2;
124
125 if (opcode == WCLK) {
126 reg1 = (operand << 20) & 0xfff00000;
127 reg2 = operand >> 12 | opcode << 1 | stop << 9;
128 } else if (opcode == WRG) {
129 reg1 = sync | glue << 4 | ++wave << 11 | ((operand << 15) & 0xffff8000);
130 reg2 = operand >> 17 | opcode << 7 | stop << 9;
131 } else {
132 reg1 = sync | glue << 4 | ++wave << 11 | ++map << 15 | ((operand << 20) & 0xfff00000);
133 reg2 = operand >> 12 | opcode << 4 | stop << 9;
134 }
135 writel(reg1, priv->dc_tmpl_reg + word * 8);
136 writel(reg2, priv->dc_tmpl_reg + word * 8 + 4);
137 }
138
ipu_bus_format_to_map(u32 fmt)139 static int ipu_bus_format_to_map(u32 fmt)
140 {
141 switch (fmt) {
142 default:
143 WARN_ON(1);
144 fallthrough;
145 case MEDIA_BUS_FMT_RGB888_1X24:
146 return IPU_DC_MAP_RGB24;
147 case MEDIA_BUS_FMT_RGB565_1X16:
148 return IPU_DC_MAP_RGB565;
149 case MEDIA_BUS_FMT_GBR888_1X24:
150 return IPU_DC_MAP_GBR24;
151 case MEDIA_BUS_FMT_RGB666_1X18:
152 return IPU_DC_MAP_BGR666;
153 case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
154 return IPU_DC_MAP_LVDS666;
155 case MEDIA_BUS_FMT_BGR888_1X24:
156 return IPU_DC_MAP_BGR24;
157 }
158 }
159
ipu_dc_init_sync(struct ipu_dc * dc,struct ipu_di * di,bool interlaced,u32 bus_format,u32 width)160 int ipu_dc_init_sync(struct ipu_dc *dc, struct ipu_di *di, bool interlaced,
161 u32 bus_format, u32 width)
162 {
163 struct ipu_dc_priv *priv = dc->priv;
164 int addr, sync;
165 u32 reg = 0;
166 int map;
167
168 dc->di = ipu_di_get_num(di);
169
170 if (!IS_ALIGNED(width, 8)) {
171 dev_warn(priv->dev,
172 "%s: hactive does not align to 8 byte\n", __func__);
173 }
174
175 map = ipu_bus_format_to_map(bus_format);
176
177 /*
178 * In interlaced mode we need more counters to create the asymmetric
179 * per-field VSYNC signals. The pixel active signal synchronising DC
180 * to DI moves to signal generator #6 (see ipu-di.c). In progressive
181 * mode counter #5 is used.
182 */
183 sync = interlaced ? 6 : 5;
184
185 /* Reserve 5 microcode template words for each DI */
186 if (dc->di)
187 addr = 5;
188 else
189 addr = 0;
190
191 if (interlaced) {
192 dc_link_event(dc, DC_EVT_NL, addr, 3);
193 dc_link_event(dc, DC_EVT_EOL, addr, 2);
194 dc_link_event(dc, DC_EVT_NEW_DATA, addr, 1);
195
196 /* Init template microcode */
197 dc_write_tmpl(dc, addr, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
198 } else {
199 dc_link_event(dc, DC_EVT_NL, addr + 2, 3);
200 dc_link_event(dc, DC_EVT_EOL, addr + 3, 2);
201 dc_link_event(dc, DC_EVT_NEW_DATA, addr + 1, 1);
202
203 /* Init template microcode */
204 dc_write_tmpl(dc, addr + 2, WROD(0), 0, map, SYNC_WAVE, 8, sync, 1);
205 dc_write_tmpl(dc, addr + 3, WROD(0), 0, map, SYNC_WAVE, 4, sync, 0);
206 dc_write_tmpl(dc, addr + 4, WRG, 0, map, NULL_WAVE, 0, 0, 1);
207 dc_write_tmpl(dc, addr + 1, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1);
208 }
209
210 dc_link_event(dc, DC_EVT_NF, 0, 0);
211 dc_link_event(dc, DC_EVT_NFIELD, 0, 0);
212 dc_link_event(dc, DC_EVT_EOF, 0, 0);
213 dc_link_event(dc, DC_EVT_EOFIELD, 0, 0);
214 dc_link_event(dc, DC_EVT_NEW_CHAN, 0, 0);
215 dc_link_event(dc, DC_EVT_NEW_ADDR, 0, 0);
216
217 reg = readl(dc->base + DC_WR_CH_CONF);
218 if (interlaced)
219 reg |= DC_WR_CH_CONF_FIELD_MODE;
220 else
221 reg &= ~DC_WR_CH_CONF_FIELD_MODE;
222 writel(reg, dc->base + DC_WR_CH_CONF);
223
224 writel(0x0, dc->base + DC_WR_CH_ADDR);
225 writel(width, priv->dc_reg + DC_DISP_CONF2(dc->di));
226
227 return 0;
228 }
229 EXPORT_SYMBOL_GPL(ipu_dc_init_sync);
230
ipu_dc_enable(struct ipu_soc * ipu)231 void ipu_dc_enable(struct ipu_soc *ipu)
232 {
233 struct ipu_dc_priv *priv = ipu->dc_priv;
234
235 mutex_lock(&priv->mutex);
236
237 if (!priv->use_count)
238 ipu_module_enable(priv->ipu, IPU_CONF_DC_EN);
239
240 priv->use_count++;
241
242 mutex_unlock(&priv->mutex);
243 }
244 EXPORT_SYMBOL_GPL(ipu_dc_enable);
245
ipu_dc_enable_channel(struct ipu_dc * dc)246 void ipu_dc_enable_channel(struct ipu_dc *dc)
247 {
248 u32 reg;
249
250 reg = readl(dc->base + DC_WR_CH_CONF);
251 reg |= DC_WR_CH_CONF_PROG_TYPE_NORMAL;
252 writel(reg, dc->base + DC_WR_CH_CONF);
253 }
254 EXPORT_SYMBOL_GPL(ipu_dc_enable_channel);
255
ipu_dc_disable_channel(struct ipu_dc * dc)256 void ipu_dc_disable_channel(struct ipu_dc *dc)
257 {
258 u32 val;
259
260 val = readl(dc->base + DC_WR_CH_CONF);
261 val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
262 writel(val, dc->base + DC_WR_CH_CONF);
263 }
264 EXPORT_SYMBOL_GPL(ipu_dc_disable_channel);
265
ipu_dc_disable(struct ipu_soc * ipu)266 void ipu_dc_disable(struct ipu_soc *ipu)
267 {
268 struct ipu_dc_priv *priv = ipu->dc_priv;
269
270 mutex_lock(&priv->mutex);
271
272 priv->use_count--;
273 if (!priv->use_count)
274 ipu_module_disable(priv->ipu, IPU_CONF_DC_EN);
275
276 if (priv->use_count < 0)
277 priv->use_count = 0;
278
279 mutex_unlock(&priv->mutex);
280 }
281 EXPORT_SYMBOL_GPL(ipu_dc_disable);
282
ipu_dc_map_config(struct ipu_dc_priv * priv,enum ipu_dc_map map,int byte_num,int offset,int mask)283 static void ipu_dc_map_config(struct ipu_dc_priv *priv, enum ipu_dc_map map,
284 int byte_num, int offset, int mask)
285 {
286 int ptr = map * 3 + byte_num;
287 u32 reg;
288
289 reg = readl(priv->dc_reg + DC_MAP_CONF_VAL(ptr));
290 reg &= ~(0xffff << (16 * (ptr & 0x1)));
291 reg |= ((offset << 8) | mask) << (16 * (ptr & 0x1));
292 writel(reg, priv->dc_reg + DC_MAP_CONF_VAL(ptr));
293
294 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
295 reg &= ~(0x1f << ((16 * (map & 0x1)) + (5 * byte_num)));
296 reg |= ptr << ((16 * (map & 0x1)) + (5 * byte_num));
297 writel(reg, priv->dc_reg + DC_MAP_CONF_PTR(map));
298 }
299
ipu_dc_map_clear(struct ipu_dc_priv * priv,int map)300 static void ipu_dc_map_clear(struct ipu_dc_priv *priv, int map)
301 {
302 u32 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
303
304 writel(reg & ~(0xffff << (16 * (map & 0x1))),
305 priv->dc_reg + DC_MAP_CONF_PTR(map));
306 }
307
ipu_dc_get(struct ipu_soc * ipu,int channel)308 struct ipu_dc *ipu_dc_get(struct ipu_soc *ipu, int channel)
309 {
310 struct ipu_dc_priv *priv = ipu->dc_priv;
311 struct ipu_dc *dc;
312
313 if (channel >= IPU_DC_NUM_CHANNELS)
314 return ERR_PTR(-ENODEV);
315
316 dc = &priv->channels[channel];
317
318 mutex_lock(&priv->mutex);
319
320 if (dc->in_use) {
321 mutex_unlock(&priv->mutex);
322 return ERR_PTR(-EBUSY);
323 }
324
325 dc->in_use = true;
326
327 mutex_unlock(&priv->mutex);
328
329 return dc;
330 }
331 EXPORT_SYMBOL_GPL(ipu_dc_get);
332
ipu_dc_put(struct ipu_dc * dc)333 void ipu_dc_put(struct ipu_dc *dc)
334 {
335 struct ipu_dc_priv *priv = dc->priv;
336
337 mutex_lock(&priv->mutex);
338 dc->in_use = false;
339 mutex_unlock(&priv->mutex);
340 }
341 EXPORT_SYMBOL_GPL(ipu_dc_put);
342
ipu_dc_init(struct ipu_soc * ipu,struct device * dev,unsigned long base,unsigned long template_base)343 int ipu_dc_init(struct ipu_soc *ipu, struct device *dev,
344 unsigned long base, unsigned long template_base)
345 {
346 struct ipu_dc_priv *priv;
347 static const int channel_offsets[] = {
348 0, 0x1c, 0x38, 0x54, 0x58, 0x5c, 0x78, 0, 0x94, 0xb4
349 };
350 int i;
351
352 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
353 if (!priv)
354 return -ENOMEM;
355
356 mutex_init(&priv->mutex);
357
358 priv->dev = dev;
359 priv->ipu = ipu;
360 priv->dc_reg = devm_ioremap(dev, base, PAGE_SIZE);
361 priv->dc_tmpl_reg = devm_ioremap(dev, template_base, PAGE_SIZE);
362 if (!priv->dc_reg || !priv->dc_tmpl_reg)
363 return -ENOMEM;
364
365 for (i = 0; i < IPU_DC_NUM_CHANNELS; i++) {
366 priv->channels[i].chno = i;
367 priv->channels[i].priv = priv;
368 priv->channels[i].base = priv->dc_reg + channel_offsets[i];
369 }
370
371 writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(1) |
372 DC_WR_CH_CONF_PROG_DI_ID,
373 priv->channels[1].base + DC_WR_CH_CONF);
374 writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(0),
375 priv->channels[5].base + DC_WR_CH_CONF);
376
377 writel(DC_GEN_SYNC_1_6_SYNC | DC_GEN_SYNC_PRIORITY_1,
378 priv->dc_reg + DC_GEN);
379
380 ipu->dc_priv = priv;
381
382 dev_dbg(dev, "DC base: 0x%08lx template base: 0x%08lx\n",
383 base, template_base);
384
385 /* rgb24 */
386 ipu_dc_map_clear(priv, IPU_DC_MAP_RGB24);
387 ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 0, 7, 0xff); /* blue */
388 ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 1, 15, 0xff); /* green */
389 ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 2, 23, 0xff); /* red */
390
391 /* rgb565 */
392 ipu_dc_map_clear(priv, IPU_DC_MAP_RGB565);
393 ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 0, 4, 0xf8); /* blue */
394 ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 1, 10, 0xfc); /* green */
395 ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 2, 15, 0xf8); /* red */
396
397 /* gbr24 */
398 ipu_dc_map_clear(priv, IPU_DC_MAP_GBR24);
399 ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 2, 15, 0xff); /* green */
400 ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 1, 7, 0xff); /* blue */
401 ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 0, 23, 0xff); /* red */
402
403 /* bgr666 */
404 ipu_dc_map_clear(priv, IPU_DC_MAP_BGR666);
405 ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 0, 5, 0xfc); /* blue */
406 ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 1, 11, 0xfc); /* green */
407 ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 2, 17, 0xfc); /* red */
408
409 /* lvds666 */
410 ipu_dc_map_clear(priv, IPU_DC_MAP_LVDS666);
411 ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 0, 5, 0xfc); /* blue */
412 ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 1, 13, 0xfc); /* green */
413 ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 2, 21, 0xfc); /* red */
414
415 /* bgr24 */
416 ipu_dc_map_clear(priv, IPU_DC_MAP_BGR24);
417 ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 2, 7, 0xff); /* red */
418 ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 1, 15, 0xff); /* green */
419 ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 0, 23, 0xff); /* blue */
420
421 return 0;
422 }
423
ipu_dc_exit(struct ipu_soc * ipu)424 void ipu_dc_exit(struct ipu_soc *ipu)
425 {
426 }
427