1 #include <linux/device.h>
2 #include <linux/dma-mapping.h>
3 #include <linux/amba/bus.h>
4 #include <linux/amba/clcd.h>
5 #include <linux/platform_data/video-clcd-versatile.h>
6 #include <linux/of.h>
7 #include <linux/of_graph.h>
8 #include <linux/regmap.h>
9 #include <linux/mfd/syscon.h>
10 #include <linux/bitops.h>
11 #include "amba-clcd-versatile.h"
12
13 static struct clcd_panel vga = {
14 .mode = {
15 .name = "VGA",
16 .refresh = 60,
17 .xres = 640,
18 .yres = 480,
19 .pixclock = 39721,
20 .left_margin = 40,
21 .right_margin = 24,
22 .upper_margin = 32,
23 .lower_margin = 11,
24 .hsync_len = 96,
25 .vsync_len = 2,
26 .sync = 0,
27 .vmode = FB_VMODE_NONINTERLACED,
28 },
29 .width = -1,
30 .height = -1,
31 .tim2 = TIM2_BCD | TIM2_IPC,
32 .cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
33 .caps = CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
34 .bpp = 16,
35 };
36
37 static struct clcd_panel xvga = {
38 .mode = {
39 .name = "XVGA",
40 .refresh = 60,
41 .xres = 1024,
42 .yres = 768,
43 .pixclock = 15748,
44 .left_margin = 152,
45 .right_margin = 48,
46 .upper_margin = 23,
47 .lower_margin = 3,
48 .hsync_len = 104,
49 .vsync_len = 4,
50 .sync = 0,
51 .vmode = FB_VMODE_NONINTERLACED,
52 },
53 .width = -1,
54 .height = -1,
55 .tim2 = TIM2_BCD | TIM2_IPC,
56 .cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
57 .caps = CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
58 .bpp = 16,
59 };
60
61 /* Sanyo TM38QV67A02A - 3.8 inch QVGA (320x240) Color TFT */
62 static struct clcd_panel sanyo_tm38qv67a02a = {
63 .mode = {
64 .name = "Sanyo TM38QV67A02A",
65 .refresh = 116,
66 .xres = 320,
67 .yres = 240,
68 .pixclock = 100000,
69 .left_margin = 6,
70 .right_margin = 6,
71 .upper_margin = 5,
72 .lower_margin = 5,
73 .hsync_len = 6,
74 .vsync_len = 6,
75 .sync = 0,
76 .vmode = FB_VMODE_NONINTERLACED,
77 },
78 .width = -1,
79 .height = -1,
80 .tim2 = TIM2_BCD,
81 .cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
82 .caps = CLCD_CAP_5551,
83 .bpp = 16,
84 };
85
86 static struct clcd_panel sanyo_2_5_in = {
87 .mode = {
88 .name = "Sanyo QVGA Portrait",
89 .refresh = 116,
90 .xres = 240,
91 .yres = 320,
92 .pixclock = 100000,
93 .left_margin = 20,
94 .right_margin = 10,
95 .upper_margin = 2,
96 .lower_margin = 2,
97 .hsync_len = 10,
98 .vsync_len = 2,
99 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
100 .vmode = FB_VMODE_NONINTERLACED,
101 },
102 .width = -1,
103 .height = -1,
104 .tim2 = TIM2_IVS | TIM2_IHS | TIM2_IPC,
105 .cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
106 .caps = CLCD_CAP_5551,
107 .bpp = 16,
108 };
109
110 /* Epson L2F50113T00 - 2.2 inch 176x220 Color TFT */
111 static struct clcd_panel epson_l2f50113t00 = {
112 .mode = {
113 .name = "Epson L2F50113T00",
114 .refresh = 390,
115 .xres = 176,
116 .yres = 220,
117 .pixclock = 62500,
118 .left_margin = 3,
119 .right_margin = 2,
120 .upper_margin = 1,
121 .lower_margin = 0,
122 .hsync_len = 3,
123 .vsync_len = 2,
124 .sync = 0,
125 .vmode = FB_VMODE_NONINTERLACED,
126 },
127 .width = -1,
128 .height = -1,
129 .tim2 = TIM2_BCD | TIM2_IPC,
130 .cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
131 .caps = CLCD_CAP_5551,
132 .bpp = 16,
133 };
134
135 static struct clcd_panel *panels[] = {
136 &vga,
137 &xvga,
138 &sanyo_tm38qv67a02a,
139 &sanyo_2_5_in,
140 &epson_l2f50113t00,
141 };
142
versatile_clcd_get_panel(const char * name)143 struct clcd_panel *versatile_clcd_get_panel(const char *name)
144 {
145 int i;
146
147 for (i = 0; i < ARRAY_SIZE(panels); i++)
148 if (strcmp(panels[i]->mode.name, name) == 0)
149 break;
150
151 if (i < ARRAY_SIZE(panels))
152 return panels[i];
153
154 pr_err("CLCD: couldn't get parameters for panel %s\n", name);
155
156 return NULL;
157 }
158
versatile_clcd_setup_dma(struct clcd_fb * fb,unsigned long framesize)159 int versatile_clcd_setup_dma(struct clcd_fb *fb, unsigned long framesize)
160 {
161 dma_addr_t dma;
162
163 fb->fb.screen_base = dma_alloc_wc(&fb->dev->dev, framesize, &dma,
164 GFP_KERNEL);
165 if (!fb->fb.screen_base) {
166 pr_err("CLCD: unable to map framebuffer\n");
167 return -ENOMEM;
168 }
169
170 fb->fb.fix.smem_start = dma;
171 fb->fb.fix.smem_len = framesize;
172
173 return 0;
174 }
175
versatile_clcd_mmap_dma(struct clcd_fb * fb,struct vm_area_struct * vma)176 int versatile_clcd_mmap_dma(struct clcd_fb *fb, struct vm_area_struct *vma)
177 {
178 return dma_mmap_wc(&fb->dev->dev, vma, fb->fb.screen_base,
179 fb->fb.fix.smem_start, fb->fb.fix.smem_len);
180 }
181
versatile_clcd_remove_dma(struct clcd_fb * fb)182 void versatile_clcd_remove_dma(struct clcd_fb *fb)
183 {
184 dma_free_wc(&fb->dev->dev, fb->fb.fix.smem_len, fb->fb.screen_base,
185 fb->fb.fix.smem_start);
186 }
187
188 #ifdef CONFIG_OF
189
190 static struct regmap *versatile_syscon_map;
191 static struct regmap *versatile_ib2_map;
192
193 /*
194 * We detect the different syscon types from the compatible strings.
195 */
196 enum versatile_clcd {
197 INTEGRATOR_CLCD_CM,
198 VERSATILE_CLCD,
199 REALVIEW_CLCD_EB,
200 REALVIEW_CLCD_PB1176,
201 REALVIEW_CLCD_PB11MP,
202 REALVIEW_CLCD_PBA8,
203 REALVIEW_CLCD_PBX,
204 };
205
206 static const struct of_device_id versatile_clcd_of_match[] = {
207 {
208 .compatible = "arm,core-module-integrator",
209 .data = (void *)INTEGRATOR_CLCD_CM,
210 },
211 {
212 .compatible = "arm,versatile-sysreg",
213 .data = (void *)VERSATILE_CLCD,
214 },
215 {
216 .compatible = "arm,realview-eb-syscon",
217 .data = (void *)REALVIEW_CLCD_EB,
218 },
219 {
220 .compatible = "arm,realview-pb1176-syscon",
221 .data = (void *)REALVIEW_CLCD_PB1176,
222 },
223 {
224 .compatible = "arm,realview-pb11mp-syscon",
225 .data = (void *)REALVIEW_CLCD_PB11MP,
226 },
227 {
228 .compatible = "arm,realview-pba8-syscon",
229 .data = (void *)REALVIEW_CLCD_PBA8,
230 },
231 {
232 .compatible = "arm,realview-pbx-syscon",
233 .data = (void *)REALVIEW_CLCD_PBX,
234 },
235 {},
236 };
237
238 /*
239 * Core module CLCD control on the Integrator/CP, bits
240 * 8 thru 19 of the CM_CONTROL register controls a bunch
241 * of CLCD settings.
242 */
243 #define INTEGRATOR_HDR_CTRL_OFFSET 0x0C
244 #define INTEGRATOR_CLCD_LCDBIASEN BIT(8)
245 #define INTEGRATOR_CLCD_LCDBIASUP BIT(9)
246 #define INTEGRATOR_CLCD_LCDBIASDN BIT(10)
247 /* Bits 11,12,13 controls the LCD type */
248 #define INTEGRATOR_CLCD_LCDMUX_MASK (BIT(11)|BIT(12)|BIT(13))
249 #define INTEGRATOR_CLCD_LCDMUX_LCD24 BIT(11)
250 #define INTEGRATOR_CLCD_LCDMUX_VGA565 BIT(12)
251 #define INTEGRATOR_CLCD_LCDMUX_SHARP (BIT(11)|BIT(12))
252 #define INTEGRATOR_CLCD_LCDMUX_VGA555 BIT(13)
253 #define INTEGRATOR_CLCD_LCDMUX_VGA24 (BIT(11)|BIT(12)|BIT(13))
254 #define INTEGRATOR_CLCD_LCD0_EN BIT(14)
255 #define INTEGRATOR_CLCD_LCD1_EN BIT(15)
256 /* R/L flip on Sharp */
257 #define INTEGRATOR_CLCD_LCD_STATIC1 BIT(16)
258 /* U/D flip on Sharp */
259 #define INTEGRATOR_CLCD_LCD_STATIC2 BIT(17)
260 /* No connection on Sharp */
261 #define INTEGRATOR_CLCD_LCD_STATIC BIT(18)
262 /* 0 = 24bit VGA, 1 = 18bit VGA */
263 #define INTEGRATOR_CLCD_LCD_N24BITEN BIT(19)
264
265 #define INTEGRATOR_CLCD_MASK (INTEGRATOR_CLCD_LCDBIASEN | \
266 INTEGRATOR_CLCD_LCDBIASUP | \
267 INTEGRATOR_CLCD_LCDBIASDN | \
268 INTEGRATOR_CLCD_LCDMUX_MASK | \
269 INTEGRATOR_CLCD_LCD0_EN | \
270 INTEGRATOR_CLCD_LCD1_EN | \
271 INTEGRATOR_CLCD_LCD_STATIC1 | \
272 INTEGRATOR_CLCD_LCD_STATIC2 | \
273 INTEGRATOR_CLCD_LCD_STATIC | \
274 INTEGRATOR_CLCD_LCD_N24BITEN)
275
integrator_clcd_enable(struct clcd_fb * fb)276 static void integrator_clcd_enable(struct clcd_fb *fb)
277 {
278 struct fb_var_screeninfo *var = &fb->fb.var;
279 u32 val;
280
281 dev_info(&fb->dev->dev, "enable Integrator CLCD connectors\n");
282
283 /* FIXME: really needed? */
284 val = INTEGRATOR_CLCD_LCD_STATIC1 | INTEGRATOR_CLCD_LCD_STATIC2 |
285 INTEGRATOR_CLCD_LCD0_EN | INTEGRATOR_CLCD_LCD1_EN;
286 if (var->bits_per_pixel <= 8 ||
287 (var->bits_per_pixel == 16 && var->green.length == 5))
288 /* Pseudocolor, RGB555, BGR555 */
289 val |= INTEGRATOR_CLCD_LCDMUX_VGA555;
290 else if (fb->fb.var.bits_per_pixel <= 16)
291 /* truecolor RGB565 */
292 val |= INTEGRATOR_CLCD_LCDMUX_VGA565;
293 else
294 val = 0; /* no idea for this, don't trust the docs */
295
296 regmap_update_bits(versatile_syscon_map,
297 INTEGRATOR_HDR_CTRL_OFFSET,
298 INTEGRATOR_CLCD_MASK,
299 val);
300 }
301
302 /*
303 * This configuration register in the Versatile and RealView
304 * family is uniformly present but appears more and more
305 * unutilized starting with the RealView series.
306 */
307 #define SYS_CLCD 0x50
308 #define SYS_CLCD_MODE_MASK (BIT(0)|BIT(1))
309 #define SYS_CLCD_MODE_888 0
310 #define SYS_CLCD_MODE_5551 BIT(0)
311 #define SYS_CLCD_MODE_565_R_LSB BIT(1)
312 #define SYS_CLCD_MODE_565_B_LSB (BIT(0)|BIT(1))
313 #define SYS_CLCD_CONNECTOR_MASK (BIT(2)|BIT(3)|BIT(4)|BIT(5))
314 #define SYS_CLCD_NLCDIOON BIT(2)
315 #define SYS_CLCD_VDDPOSSWITCH BIT(3)
316 #define SYS_CLCD_PWR3V5SWITCH BIT(4)
317 #define SYS_CLCD_VDDNEGSWITCH BIT(5)
318 #define SYS_CLCD_TSNSS BIT(6) /* touchscreen enable */
319 #define SYS_CLCD_SSPEXP BIT(7) /* SSP expansion enable */
320
321 /* The Versatile can detect the connected panel type */
322 #define SYS_CLCD_CLCDID_MASK (BIT(8)|BIT(9)|BIT(10)|BIT(11)|BIT(12))
323 #define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
324 #define SYS_CLCD_ID_SHARP_8_4 (0x01 << 8)
325 #define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
326 #define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
327 #define SYS_CLCD_ID_VGA (0x1f << 8)
328
329 #define SYS_CLCD_TSNDAV BIT(13) /* data ready from TS */
330
331 /* IB2 control register for the Versatile daughterboard */
332 #define IB2_CTRL 0x00
333 #define IB2_CTRL_LCD_SD BIT(1) /* 1 = shut down LCD */
334 #define IB2_CTRL_LCD_BL_ON BIT(0)
335 #define IB2_CTRL_LCD_MASK (BIT(0)|BIT(1))
336
versatile_clcd_disable(struct clcd_fb * fb)337 static void versatile_clcd_disable(struct clcd_fb *fb)
338 {
339 dev_info(&fb->dev->dev, "disable Versatile CLCD connectors\n");
340 regmap_update_bits(versatile_syscon_map,
341 SYS_CLCD,
342 SYS_CLCD_CONNECTOR_MASK,
343 0);
344
345 /* If we're on an IB2 daughterboard, turn off display */
346 if (versatile_ib2_map) {
347 dev_info(&fb->dev->dev, "disable IB2 display\n");
348 regmap_update_bits(versatile_ib2_map,
349 IB2_CTRL,
350 IB2_CTRL_LCD_MASK,
351 IB2_CTRL_LCD_SD);
352 }
353 }
354
versatile_clcd_enable(struct clcd_fb * fb)355 static void versatile_clcd_enable(struct clcd_fb *fb)
356 {
357 struct fb_var_screeninfo *var = &fb->fb.var;
358 u32 val = 0;
359
360 dev_info(&fb->dev->dev, "enable Versatile CLCD connectors\n");
361 switch (var->green.length) {
362 case 5:
363 val |= SYS_CLCD_MODE_5551;
364 break;
365 case 6:
366 if (var->red.offset == 0)
367 val |= SYS_CLCD_MODE_565_R_LSB;
368 else
369 val |= SYS_CLCD_MODE_565_B_LSB;
370 break;
371 case 8:
372 val |= SYS_CLCD_MODE_888;
373 break;
374 }
375
376 /* Set up the MUX */
377 regmap_update_bits(versatile_syscon_map,
378 SYS_CLCD,
379 SYS_CLCD_MODE_MASK,
380 val);
381
382 /* Then enable the display */
383 regmap_update_bits(versatile_syscon_map,
384 SYS_CLCD,
385 SYS_CLCD_CONNECTOR_MASK,
386 SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
387
388 /* If we're on an IB2 daughterboard, turn on display */
389 if (versatile_ib2_map) {
390 dev_info(&fb->dev->dev, "enable IB2 display\n");
391 regmap_update_bits(versatile_ib2_map,
392 IB2_CTRL,
393 IB2_CTRL_LCD_MASK,
394 IB2_CTRL_LCD_BL_ON);
395 }
396 }
397
versatile_clcd_decode(struct clcd_fb * fb,struct clcd_regs * regs)398 static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs)
399 {
400 clcdfb_decode(fb, regs);
401
402 /* Always clear BGR for RGB565: we do the routing externally */
403 if (fb->fb.var.green.length == 6)
404 regs->cntl &= ~CNTL_BGR;
405 }
406
realview_clcd_disable(struct clcd_fb * fb)407 static void realview_clcd_disable(struct clcd_fb *fb)
408 {
409 dev_info(&fb->dev->dev, "disable RealView CLCD connectors\n");
410 regmap_update_bits(versatile_syscon_map,
411 SYS_CLCD,
412 SYS_CLCD_CONNECTOR_MASK,
413 0);
414 }
415
realview_clcd_enable(struct clcd_fb * fb)416 static void realview_clcd_enable(struct clcd_fb *fb)
417 {
418 dev_info(&fb->dev->dev, "enable RealView CLCD connectors\n");
419 regmap_update_bits(versatile_syscon_map,
420 SYS_CLCD,
421 SYS_CLCD_CONNECTOR_MASK,
422 SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
423 }
424
425 struct versatile_panel {
426 u32 id;
427 char *compatible;
428 bool ib2;
429 };
430
431 static const struct versatile_panel versatile_panels[] = {
432 {
433 .id = SYS_CLCD_ID_VGA,
434 .compatible = "VGA",
435 },
436 {
437 .id = SYS_CLCD_ID_SANYO_3_8,
438 .compatible = "sanyo,tm38qv67a02a",
439 },
440 {
441 .id = SYS_CLCD_ID_SHARP_8_4,
442 .compatible = "sharp,lq084v1dg21",
443 },
444 {
445 .id = SYS_CLCD_ID_EPSON_2_2,
446 .compatible = "epson,l2f50113t00",
447 },
448 {
449 .id = SYS_CLCD_ID_SANYO_2_5,
450 .compatible = "sanyo,alr252rgt",
451 .ib2 = true,
452 },
453 };
454
versatile_panel_probe(struct device * dev,struct device_node * panel)455 static void versatile_panel_probe(struct device *dev, struct device_node *panel)
456 {
457 struct versatile_panel const *vpanel = NULL;
458 u32 val;
459 int ret;
460 int i;
461
462 /*
463 * The Versatile CLCD has a panel auto-detection mechanism.
464 * We use this and look for the compatible panel in the
465 * device tree.
466 */
467 ret = regmap_read(versatile_syscon_map, SYS_CLCD, &val);
468 if (ret) {
469 dev_err(dev, "cannot read CLCD syscon register\n");
470 return;
471 }
472 val &= SYS_CLCD_CLCDID_MASK;
473
474 /* First find corresponding panel information */
475 for (i = 0; i < ARRAY_SIZE(versatile_panels); i++) {
476 vpanel = &versatile_panels[i];
477
478 if (val == vpanel->id) {
479 dev_err(dev, "autodetected panel \"%s\"\n",
480 vpanel->compatible);
481 break;
482 }
483 }
484 if (i == ARRAY_SIZE(versatile_panels)) {
485 dev_err(dev, "could not auto-detect panel\n");
486 return;
487 }
488
489 if (!of_device_is_compatible(panel, vpanel->compatible))
490 dev_err(dev, "panel in DT is not compatible with the "
491 "auto-detected panel, continuing anyway\n");
492
493 /*
494 * If we have a Sanyo 2.5" port
495 * that we're running on an IB2 and proceed to look for the
496 * IB2 syscon regmap.
497 */
498 if (!vpanel->ib2)
499 return;
500
501 versatile_ib2_map = syscon_regmap_lookup_by_compatible(
502 "arm,versatile-ib2-syscon");
503 if (IS_ERR(versatile_ib2_map)) {
504 dev_err(dev, "could not locate IB2 control register\n");
505 versatile_ib2_map = NULL;
506 return;
507 }
508 }
509
versatile_clcd_init_panel(struct clcd_fb * fb,struct device_node * panel)510 int versatile_clcd_init_panel(struct clcd_fb *fb, struct device_node *panel)
511 {
512 const struct of_device_id *clcd_id;
513 enum versatile_clcd versatile_clcd_type;
514 struct device_node *np;
515 struct regmap *map;
516 struct device *dev = &fb->dev->dev;
517
518 np = of_find_matching_node_and_match(NULL, versatile_clcd_of_match,
519 &clcd_id);
520 if (!np) {
521 /* Vexpress does not have this */
522 return 0;
523 }
524 versatile_clcd_type = (enum versatile_clcd)clcd_id->data;
525
526 map = syscon_node_to_regmap(np);
527 if (IS_ERR(map)) {
528 dev_err(dev, "no Versatile syscon regmap\n");
529 return PTR_ERR(map);
530 }
531
532 switch (versatile_clcd_type) {
533 case INTEGRATOR_CLCD_CM:
534 versatile_syscon_map = map;
535 fb->board->enable = integrator_clcd_enable;
536 /* Override the caps, we have only these */
537 fb->board->caps = CLCD_CAP_5551 | CLCD_CAP_RGB565 |
538 CLCD_CAP_888;
539 dev_info(dev, "set up callbacks for Integrator PL110\n");
540 break;
541 case VERSATILE_CLCD:
542 versatile_syscon_map = map;
543 fb->board->enable = versatile_clcd_enable;
544 fb->board->disable = versatile_clcd_disable;
545 fb->board->decode = versatile_clcd_decode;
546 versatile_panel_probe(dev, panel);
547 dev_info(dev, "set up callbacks for Versatile\n");
548 break;
549 case REALVIEW_CLCD_EB:
550 case REALVIEW_CLCD_PB1176:
551 case REALVIEW_CLCD_PB11MP:
552 case REALVIEW_CLCD_PBA8:
553 case REALVIEW_CLCD_PBX:
554 versatile_syscon_map = map;
555 fb->board->enable = realview_clcd_enable;
556 fb->board->disable = realview_clcd_disable;
557 dev_info(dev, "set up callbacks for RealView PL111\n");
558 break;
559 default:
560 dev_info(dev, "unknown Versatile system controller\n");
561 break;
562 }
563
564 return 0;
565 }
566 EXPORT_SYMBOL_GPL(versatile_clcd_init_panel);
567 #endif
568