1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Register interface file for EXYNOS FIMC-LITE (camera interface) driver 4 * 5 * Copyright (C) 2012 Samsung Electronics Co., Ltd. 6 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> 7 */ 8 9 #include <linux/bitops.h> 10 #include <linux/delay.h> 11 #include <linux/io.h> 12 #include <media/drv-intf/exynos-fimc.h> 13 14 #include "fimc-lite-reg.h" 15 #include "fimc-lite.h" 16 #include "fimc-core.h" 17 18 #define FLITE_RESET_TIMEOUT 50 /* in ms */ 19 20 void flite_hw_reset(struct fimc_lite *dev) 21 { 22 unsigned long end = jiffies + msecs_to_jiffies(FLITE_RESET_TIMEOUT); 23 u32 cfg; 24 25 cfg = readl(dev->regs + FLITE_REG_CIGCTRL); 26 cfg |= FLITE_REG_CIGCTRL_SWRST_REQ; 27 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 28 29 while (time_is_after_jiffies(end)) { 30 cfg = readl(dev->regs + FLITE_REG_CIGCTRL); 31 if (cfg & FLITE_REG_CIGCTRL_SWRST_RDY) 32 break; 33 usleep_range(1000, 5000); 34 } 35 36 cfg |= FLITE_REG_CIGCTRL_SWRST; 37 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 38 } 39 40 void flite_hw_clear_pending_irq(struct fimc_lite *dev) 41 { 42 u32 cfg = readl(dev->regs + FLITE_REG_CISTATUS); 43 cfg &= ~FLITE_REG_CISTATUS_IRQ_CAM; 44 writel(cfg, dev->regs + FLITE_REG_CISTATUS); 45 } 46 47 u32 flite_hw_get_interrupt_source(struct fimc_lite *dev) 48 { 49 u32 intsrc = readl(dev->regs + FLITE_REG_CISTATUS); 50 return intsrc & FLITE_REG_CISTATUS_IRQ_MASK; 51 } 52 53 void flite_hw_clear_last_capture_end(struct fimc_lite *dev) 54 { 55 56 u32 cfg = readl(dev->regs + FLITE_REG_CISTATUS2); 57 cfg &= ~FLITE_REG_CISTATUS2_LASTCAPEND; 58 writel(cfg, dev->regs + FLITE_REG_CISTATUS2); 59 } 60 61 void flite_hw_set_interrupt_mask(struct fimc_lite *dev) 62 { 63 u32 cfg, intsrc; 64 65 /* Select interrupts to be enabled for each output mode */ 66 if (atomic_read(&dev->out_path) == FIMC_IO_DMA) { 67 intsrc = FLITE_REG_CIGCTRL_IRQ_OVFEN | 68 FLITE_REG_CIGCTRL_IRQ_LASTEN | 69 FLITE_REG_CIGCTRL_IRQ_STARTEN | 70 FLITE_REG_CIGCTRL_IRQ_ENDEN; 71 } else { 72 /* An output to the FIMC-IS */ 73 intsrc = FLITE_REG_CIGCTRL_IRQ_OVFEN | 74 FLITE_REG_CIGCTRL_IRQ_LASTEN; 75 } 76 77 cfg = readl(dev->regs + FLITE_REG_CIGCTRL); 78 cfg |= FLITE_REG_CIGCTRL_IRQ_DISABLE_MASK; 79 cfg &= ~intsrc; 80 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 81 } 82 83 void flite_hw_capture_start(struct fimc_lite *dev) 84 { 85 u32 cfg = readl(dev->regs + FLITE_REG_CIIMGCPT); 86 cfg |= FLITE_REG_CIIMGCPT_IMGCPTEN; 87 writel(cfg, dev->regs + FLITE_REG_CIIMGCPT); 88 } 89 90 void flite_hw_capture_stop(struct fimc_lite *dev) 91 { 92 u32 cfg = readl(dev->regs + FLITE_REG_CIIMGCPT); 93 cfg &= ~FLITE_REG_CIIMGCPT_IMGCPTEN; 94 writel(cfg, dev->regs + FLITE_REG_CIIMGCPT); 95 } 96 97 /* 98 * Test pattern (color bars) enable/disable. External sensor 99 * pixel clock must be active for the test pattern to work. 100 */ 101 void flite_hw_set_test_pattern(struct fimc_lite *dev, bool on) 102 { 103 u32 cfg = readl(dev->regs + FLITE_REG_CIGCTRL); 104 if (on) 105 cfg |= FLITE_REG_CIGCTRL_TEST_PATTERN_COLORBAR; 106 else 107 cfg &= ~FLITE_REG_CIGCTRL_TEST_PATTERN_COLORBAR; 108 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 109 } 110 111 static const u32 src_pixfmt_map[8][3] = { 112 { MEDIA_BUS_FMT_YUYV8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_YCBYCR, 113 FLITE_REG_CIGCTRL_YUV422_1P }, 114 { MEDIA_BUS_FMT_YVYU8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_YCRYCB, 115 FLITE_REG_CIGCTRL_YUV422_1P }, 116 { MEDIA_BUS_FMT_UYVY8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_CBYCRY, 117 FLITE_REG_CIGCTRL_YUV422_1P }, 118 { MEDIA_BUS_FMT_VYUY8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_CRYCBY, 119 FLITE_REG_CIGCTRL_YUV422_1P }, 120 { MEDIA_BUS_FMT_SGRBG8_1X8, 0, FLITE_REG_CIGCTRL_RAW8 }, 121 { MEDIA_BUS_FMT_SGRBG10_1X10, 0, FLITE_REG_CIGCTRL_RAW10 }, 122 { MEDIA_BUS_FMT_SGRBG12_1X12, 0, FLITE_REG_CIGCTRL_RAW12 }, 123 { MEDIA_BUS_FMT_JPEG_1X8, 0, FLITE_REG_CIGCTRL_USER(1) }, 124 }; 125 126 /* Set camera input pixel format and resolution */ 127 void flite_hw_set_source_format(struct fimc_lite *dev, struct flite_frame *f) 128 { 129 u32 pixelcode = f->fmt->mbus_code; 130 int i = ARRAY_SIZE(src_pixfmt_map); 131 u32 cfg; 132 133 while (--i) { 134 if (src_pixfmt_map[i][0] == pixelcode) 135 break; 136 } 137 138 if (i == 0 && src_pixfmt_map[i][0] != pixelcode) { 139 v4l2_err(&dev->ve.vdev, 140 "Unsupported pixel code, falling back to %#08x\n", 141 src_pixfmt_map[i][0]); 142 } 143 144 cfg = readl(dev->regs + FLITE_REG_CIGCTRL); 145 cfg &= ~FLITE_REG_CIGCTRL_FMT_MASK; 146 cfg |= src_pixfmt_map[i][2]; 147 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 148 149 cfg = readl(dev->regs + FLITE_REG_CISRCSIZE); 150 cfg &= ~(FLITE_REG_CISRCSIZE_ORDER422_MASK | 151 FLITE_REG_CISRCSIZE_SIZE_CAM_MASK); 152 cfg |= (f->f_width << 16) | f->f_height; 153 cfg |= src_pixfmt_map[i][1]; 154 writel(cfg, dev->regs + FLITE_REG_CISRCSIZE); 155 } 156 157 /* Set the camera host input window offsets (cropping) */ 158 void flite_hw_set_window_offset(struct fimc_lite *dev, struct flite_frame *f) 159 { 160 u32 hoff2, voff2; 161 u32 cfg; 162 163 cfg = readl(dev->regs + FLITE_REG_CIWDOFST); 164 cfg &= ~FLITE_REG_CIWDOFST_OFST_MASK; 165 cfg |= (f->rect.left << 16) | f->rect.top; 166 cfg |= FLITE_REG_CIWDOFST_WINOFSEN; 167 writel(cfg, dev->regs + FLITE_REG_CIWDOFST); 168 169 hoff2 = f->f_width - f->rect.width - f->rect.left; 170 voff2 = f->f_height - f->rect.height - f->rect.top; 171 172 cfg = (hoff2 << 16) | voff2; 173 writel(cfg, dev->regs + FLITE_REG_CIWDOFST2); 174 } 175 176 /* Select camera port (A, B) */ 177 static void flite_hw_set_camera_port(struct fimc_lite *dev, int id) 178 { 179 u32 cfg = readl(dev->regs + FLITE_REG_CIGENERAL); 180 if (id == 0) 181 cfg &= ~FLITE_REG_CIGENERAL_CAM_B; 182 else 183 cfg |= FLITE_REG_CIGENERAL_CAM_B; 184 writel(cfg, dev->regs + FLITE_REG_CIGENERAL); 185 } 186 187 /* Select serial or parallel bus, camera port (A,B) and set signals polarity */ 188 void flite_hw_set_camera_bus(struct fimc_lite *dev, 189 struct fimc_source_info *si) 190 { 191 u32 cfg = readl(dev->regs + FLITE_REG_CIGCTRL); 192 unsigned int flags = si->flags; 193 194 if (si->sensor_bus_type != FIMC_BUS_TYPE_MIPI_CSI2) { 195 cfg &= ~(FLITE_REG_CIGCTRL_SELCAM_MIPI | 196 FLITE_REG_CIGCTRL_INVPOLPCLK | 197 FLITE_REG_CIGCTRL_INVPOLVSYNC | 198 FLITE_REG_CIGCTRL_INVPOLHREF); 199 200 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 201 cfg |= FLITE_REG_CIGCTRL_INVPOLPCLK; 202 203 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) 204 cfg |= FLITE_REG_CIGCTRL_INVPOLVSYNC; 205 206 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) 207 cfg |= FLITE_REG_CIGCTRL_INVPOLHREF; 208 } else { 209 cfg |= FLITE_REG_CIGCTRL_SELCAM_MIPI; 210 } 211 212 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 213 214 flite_hw_set_camera_port(dev, si->mux_id); 215 } 216 217 static void flite_hw_set_pack12(struct fimc_lite *dev, int on) 218 { 219 u32 cfg = readl(dev->regs + FLITE_REG_CIODMAFMT); 220 221 cfg &= ~FLITE_REG_CIODMAFMT_PACK12; 222 223 if (on) 224 cfg |= FLITE_REG_CIODMAFMT_PACK12; 225 226 writel(cfg, dev->regs + FLITE_REG_CIODMAFMT); 227 } 228 229 static void flite_hw_set_out_order(struct fimc_lite *dev, struct flite_frame *f) 230 { 231 static const u32 pixcode[4][2] = { 232 { MEDIA_BUS_FMT_YUYV8_2X8, FLITE_REG_CIODMAFMT_YCBYCR }, 233 { MEDIA_BUS_FMT_YVYU8_2X8, FLITE_REG_CIODMAFMT_YCRYCB }, 234 { MEDIA_BUS_FMT_UYVY8_2X8, FLITE_REG_CIODMAFMT_CBYCRY }, 235 { MEDIA_BUS_FMT_VYUY8_2X8, FLITE_REG_CIODMAFMT_CRYCBY }, 236 }; 237 u32 cfg = readl(dev->regs + FLITE_REG_CIODMAFMT); 238 int i = ARRAY_SIZE(pixcode); 239 240 while (--i) 241 if (pixcode[i][0] == f->fmt->mbus_code) 242 break; 243 cfg &= ~FLITE_REG_CIODMAFMT_YCBCR_ORDER_MASK; 244 writel(cfg | pixcode[i][1], dev->regs + FLITE_REG_CIODMAFMT); 245 } 246 247 void flite_hw_set_dma_window(struct fimc_lite *dev, struct flite_frame *f) 248 { 249 u32 cfg; 250 251 /* Maximum output pixel size */ 252 cfg = readl(dev->regs + FLITE_REG_CIOCAN); 253 cfg &= ~FLITE_REG_CIOCAN_MASK; 254 cfg |= (f->f_height << 16) | f->f_width; 255 writel(cfg, dev->regs + FLITE_REG_CIOCAN); 256 257 /* DMA offsets */ 258 cfg = readl(dev->regs + FLITE_REG_CIOOFF); 259 cfg &= ~FLITE_REG_CIOOFF_MASK; 260 cfg |= (f->rect.top << 16) | f->rect.left; 261 writel(cfg, dev->regs + FLITE_REG_CIOOFF); 262 } 263 264 void flite_hw_set_dma_buffer(struct fimc_lite *dev, struct flite_buffer *buf) 265 { 266 unsigned int index; 267 u32 cfg; 268 269 if (dev->dd->max_dma_bufs == 1) 270 index = 0; 271 else 272 index = buf->index; 273 274 if (index == 0) 275 writel(buf->addr, dev->regs + FLITE_REG_CIOSA); 276 else 277 writel(buf->addr, dev->regs + FLITE_REG_CIOSAN(index - 1)); 278 279 cfg = readl(dev->regs + FLITE_REG_CIFCNTSEQ); 280 cfg |= BIT(index); 281 writel(cfg, dev->regs + FLITE_REG_CIFCNTSEQ); 282 } 283 284 void flite_hw_mask_dma_buffer(struct fimc_lite *dev, u32 index) 285 { 286 u32 cfg; 287 288 if (dev->dd->max_dma_bufs == 1) 289 index = 0; 290 291 cfg = readl(dev->regs + FLITE_REG_CIFCNTSEQ); 292 cfg &= ~BIT(index); 293 writel(cfg, dev->regs + FLITE_REG_CIFCNTSEQ); 294 } 295 296 /* Enable/disable output DMA, set output pixel size and offsets (composition) */ 297 void flite_hw_set_output_dma(struct fimc_lite *dev, struct flite_frame *f, 298 bool enable) 299 { 300 u32 cfg = readl(dev->regs + FLITE_REG_CIGCTRL); 301 302 if (!enable) { 303 cfg |= FLITE_REG_CIGCTRL_ODMA_DISABLE; 304 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 305 return; 306 } 307 308 cfg &= ~FLITE_REG_CIGCTRL_ODMA_DISABLE; 309 writel(cfg, dev->regs + FLITE_REG_CIGCTRL); 310 311 flite_hw_set_out_order(dev, f); 312 flite_hw_set_dma_window(dev, f); 313 flite_hw_set_pack12(dev, 0); 314 } 315 316 void flite_hw_dump_regs(struct fimc_lite *dev, const char *label) 317 { 318 struct { 319 u32 offset; 320 const char * const name; 321 } registers[] = { 322 { 0x00, "CISRCSIZE" }, 323 { 0x04, "CIGCTRL" }, 324 { 0x08, "CIIMGCPT" }, 325 { 0x0c, "CICPTSEQ" }, 326 { 0x10, "CIWDOFST" }, 327 { 0x14, "CIWDOFST2" }, 328 { 0x18, "CIODMAFMT" }, 329 { 0x20, "CIOCAN" }, 330 { 0x24, "CIOOFF" }, 331 { 0x30, "CIOSA" }, 332 { 0x40, "CISTATUS" }, 333 { 0x44, "CISTATUS2" }, 334 { 0xf0, "CITHOLD" }, 335 { 0xfc, "CIGENERAL" }, 336 }; 337 u32 i; 338 339 v4l2_info(&dev->subdev, "--- %s ---\n", label); 340 341 for (i = 0; i < ARRAY_SIZE(registers); i++) { 342 u32 cfg = readl(dev->regs + registers[i].offset); 343 v4l2_info(&dev->subdev, "%9s: 0x%08x\n", 344 registers[i].name, cfg); 345 } 346 } 347