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 }; 108 109 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 } 118 119 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 } 138 139 static int ipu_bus_format_to_map(u32 fmt) 140 { 141 switch (fmt) { 142 default: 143 WARN_ON(1); 144 /* fall-through */ 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 } 159 160 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 map = ipu_bus_format_to_map(bus_format); 171 172 /* 173 * In interlaced mode we need more counters to create the asymmetric 174 * per-field VSYNC signals. The pixel active signal synchronising DC 175 * to DI moves to signal generator #6 (see ipu-di.c). In progressive 176 * mode counter #5 is used. 177 */ 178 sync = interlaced ? 6 : 5; 179 180 /* Reserve 5 microcode template words for each DI */ 181 if (dc->di) 182 addr = 5; 183 else 184 addr = 0; 185 186 if (interlaced) { 187 dc_link_event(dc, DC_EVT_NL, addr, 3); 188 dc_link_event(dc, DC_EVT_EOL, addr, 2); 189 dc_link_event(dc, DC_EVT_NEW_DATA, addr, 1); 190 191 /* Init template microcode */ 192 dc_write_tmpl(dc, addr, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1); 193 } else { 194 dc_link_event(dc, DC_EVT_NL, addr + 2, 3); 195 dc_link_event(dc, DC_EVT_EOL, addr + 3, 2); 196 dc_link_event(dc, DC_EVT_NEW_DATA, addr + 1, 1); 197 198 /* Init template microcode */ 199 dc_write_tmpl(dc, addr + 2, WROD(0), 0, map, SYNC_WAVE, 8, sync, 1); 200 dc_write_tmpl(dc, addr + 3, WROD(0), 0, map, SYNC_WAVE, 4, sync, 0); 201 dc_write_tmpl(dc, addr + 4, WRG, 0, map, NULL_WAVE, 0, 0, 1); 202 dc_write_tmpl(dc, addr + 1, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1); 203 } 204 205 dc_link_event(dc, DC_EVT_NF, 0, 0); 206 dc_link_event(dc, DC_EVT_NFIELD, 0, 0); 207 dc_link_event(dc, DC_EVT_EOF, 0, 0); 208 dc_link_event(dc, DC_EVT_EOFIELD, 0, 0); 209 dc_link_event(dc, DC_EVT_NEW_CHAN, 0, 0); 210 dc_link_event(dc, DC_EVT_NEW_ADDR, 0, 0); 211 212 reg = readl(dc->base + DC_WR_CH_CONF); 213 if (interlaced) 214 reg |= DC_WR_CH_CONF_FIELD_MODE; 215 else 216 reg &= ~DC_WR_CH_CONF_FIELD_MODE; 217 writel(reg, dc->base + DC_WR_CH_CONF); 218 219 writel(0x0, dc->base + DC_WR_CH_ADDR); 220 writel(width, priv->dc_reg + DC_DISP_CONF2(dc->di)); 221 222 return 0; 223 } 224 EXPORT_SYMBOL_GPL(ipu_dc_init_sync); 225 226 void ipu_dc_enable(struct ipu_soc *ipu) 227 { 228 struct ipu_dc_priv *priv = ipu->dc_priv; 229 230 mutex_lock(&priv->mutex); 231 232 if (!priv->use_count) 233 ipu_module_enable(priv->ipu, IPU_CONF_DC_EN); 234 235 priv->use_count++; 236 237 mutex_unlock(&priv->mutex); 238 } 239 EXPORT_SYMBOL_GPL(ipu_dc_enable); 240 241 void ipu_dc_enable_channel(struct ipu_dc *dc) 242 { 243 u32 reg; 244 245 reg = readl(dc->base + DC_WR_CH_CONF); 246 reg |= DC_WR_CH_CONF_PROG_TYPE_NORMAL; 247 writel(reg, dc->base + DC_WR_CH_CONF); 248 } 249 EXPORT_SYMBOL_GPL(ipu_dc_enable_channel); 250 251 void ipu_dc_disable_channel(struct ipu_dc *dc) 252 { 253 u32 val; 254 255 val = readl(dc->base + DC_WR_CH_CONF); 256 val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK; 257 writel(val, dc->base + DC_WR_CH_CONF); 258 } 259 EXPORT_SYMBOL_GPL(ipu_dc_disable_channel); 260 261 void ipu_dc_disable(struct ipu_soc *ipu) 262 { 263 struct ipu_dc_priv *priv = ipu->dc_priv; 264 265 mutex_lock(&priv->mutex); 266 267 priv->use_count--; 268 if (!priv->use_count) 269 ipu_module_disable(priv->ipu, IPU_CONF_DC_EN); 270 271 if (priv->use_count < 0) 272 priv->use_count = 0; 273 274 mutex_unlock(&priv->mutex); 275 } 276 EXPORT_SYMBOL_GPL(ipu_dc_disable); 277 278 static void ipu_dc_map_config(struct ipu_dc_priv *priv, enum ipu_dc_map map, 279 int byte_num, int offset, int mask) 280 { 281 int ptr = map * 3 + byte_num; 282 u32 reg; 283 284 reg = readl(priv->dc_reg + DC_MAP_CONF_VAL(ptr)); 285 reg &= ~(0xffff << (16 * (ptr & 0x1))); 286 reg |= ((offset << 8) | mask) << (16 * (ptr & 0x1)); 287 writel(reg, priv->dc_reg + DC_MAP_CONF_VAL(ptr)); 288 289 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map)); 290 reg &= ~(0x1f << ((16 * (map & 0x1)) + (5 * byte_num))); 291 reg |= ptr << ((16 * (map & 0x1)) + (5 * byte_num)); 292 writel(reg, priv->dc_reg + DC_MAP_CONF_PTR(map)); 293 } 294 295 static void ipu_dc_map_clear(struct ipu_dc_priv *priv, int map) 296 { 297 u32 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map)); 298 299 writel(reg & ~(0xffff << (16 * (map & 0x1))), 300 priv->dc_reg + DC_MAP_CONF_PTR(map)); 301 } 302 303 struct ipu_dc *ipu_dc_get(struct ipu_soc *ipu, int channel) 304 { 305 struct ipu_dc_priv *priv = ipu->dc_priv; 306 struct ipu_dc *dc; 307 308 if (channel >= IPU_DC_NUM_CHANNELS) 309 return ERR_PTR(-ENODEV); 310 311 dc = &priv->channels[channel]; 312 313 mutex_lock(&priv->mutex); 314 315 if (dc->in_use) { 316 mutex_unlock(&priv->mutex); 317 return ERR_PTR(-EBUSY); 318 } 319 320 dc->in_use = true; 321 322 mutex_unlock(&priv->mutex); 323 324 return dc; 325 } 326 EXPORT_SYMBOL_GPL(ipu_dc_get); 327 328 void ipu_dc_put(struct ipu_dc *dc) 329 { 330 struct ipu_dc_priv *priv = dc->priv; 331 332 mutex_lock(&priv->mutex); 333 dc->in_use = false; 334 mutex_unlock(&priv->mutex); 335 } 336 EXPORT_SYMBOL_GPL(ipu_dc_put); 337 338 int ipu_dc_init(struct ipu_soc *ipu, struct device *dev, 339 unsigned long base, unsigned long template_base) 340 { 341 struct ipu_dc_priv *priv; 342 static int channel_offsets[] = { 0, 0x1c, 0x38, 0x54, 0x58, 0x5c, 343 0x78, 0, 0x94, 0xb4}; 344 int i; 345 346 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 347 if (!priv) 348 return -ENOMEM; 349 350 mutex_init(&priv->mutex); 351 352 priv->dev = dev; 353 priv->ipu = ipu; 354 priv->dc_reg = devm_ioremap(dev, base, PAGE_SIZE); 355 priv->dc_tmpl_reg = devm_ioremap(dev, template_base, PAGE_SIZE); 356 if (!priv->dc_reg || !priv->dc_tmpl_reg) 357 return -ENOMEM; 358 359 for (i = 0; i < IPU_DC_NUM_CHANNELS; i++) { 360 priv->channels[i].chno = i; 361 priv->channels[i].priv = priv; 362 priv->channels[i].base = priv->dc_reg + channel_offsets[i]; 363 } 364 365 writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(1) | 366 DC_WR_CH_CONF_PROG_DI_ID, 367 priv->channels[1].base + DC_WR_CH_CONF); 368 writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(0), 369 priv->channels[5].base + DC_WR_CH_CONF); 370 371 writel(DC_GEN_SYNC_1_6_SYNC | DC_GEN_SYNC_PRIORITY_1, 372 priv->dc_reg + DC_GEN); 373 374 ipu->dc_priv = priv; 375 376 dev_dbg(dev, "DC base: 0x%08lx template base: 0x%08lx\n", 377 base, template_base); 378 379 /* rgb24 */ 380 ipu_dc_map_clear(priv, IPU_DC_MAP_RGB24); 381 ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 0, 7, 0xff); /* blue */ 382 ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 1, 15, 0xff); /* green */ 383 ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 2, 23, 0xff); /* red */ 384 385 /* rgb565 */ 386 ipu_dc_map_clear(priv, IPU_DC_MAP_RGB565); 387 ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 0, 4, 0xf8); /* blue */ 388 ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 1, 10, 0xfc); /* green */ 389 ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 2, 15, 0xf8); /* red */ 390 391 /* gbr24 */ 392 ipu_dc_map_clear(priv, IPU_DC_MAP_GBR24); 393 ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 2, 15, 0xff); /* green */ 394 ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 1, 7, 0xff); /* blue */ 395 ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 0, 23, 0xff); /* red */ 396 397 /* bgr666 */ 398 ipu_dc_map_clear(priv, IPU_DC_MAP_BGR666); 399 ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 0, 5, 0xfc); /* blue */ 400 ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 1, 11, 0xfc); /* green */ 401 ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 2, 17, 0xfc); /* red */ 402 403 /* lvds666 */ 404 ipu_dc_map_clear(priv, IPU_DC_MAP_LVDS666); 405 ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 0, 5, 0xfc); /* blue */ 406 ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 1, 13, 0xfc); /* green */ 407 ipu_dc_map_config(priv, IPU_DC_MAP_LVDS666, 2, 21, 0xfc); /* red */ 408 409 /* bgr24 */ 410 ipu_dc_map_clear(priv, IPU_DC_MAP_BGR24); 411 ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 2, 7, 0xff); /* red */ 412 ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 1, 15, 0xff); /* green */ 413 ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 0, 23, 0xff); /* blue */ 414 415 return 0; 416 } 417 418 void ipu_dc_exit(struct ipu_soc *ipu) 419 { 420 } 421