1 /*
2  * Silicon Motion SM7XX frame buffer device
3  *
4  * Copyright (C) 2006 Silicon Motion Technology Corp.
5  * Authors: Ge Wang, gewang@siliconmotion.com
6  *	    Boyod boyod.yang@siliconmotion.com.cn
7  *
8  * Copyright (C) 2009 Lemote, Inc.
9  * Author: Wu Zhangjin, wuzhangjin@gmail.com
10  *
11  * Copyright (C) 2011 Igalia, S.L.
12  * Author: Javier M. Mellid <jmunhoz@igalia.com>
13  *
14  *  This file is subject to the terms and conditions of the GNU General Public
15  *  License. See the file COPYING in the main directory of this archive for
16  *  more details.
17  *
18  * Version 0.10.26192.21.01
19  *	- Add PowerPC/Big endian support
20  *	- Verified on 2.6.19.2
21  *	Boyod.yang <boyod.yang@siliconmotion.com.cn>
22  *
23  * Version 0.09.2621.00.01
24  *	- Only support Linux Kernel's version 2.6.21
25  *	Boyod.yang <boyod.yang@siliconmotion.com.cn>
26  *
27  * Version 0.09
28  *	- Only support Linux Kernel's version 2.6.12
29  *	Boyod.yang <boyod.yang@siliconmotion.com.cn>
30  */
31 
32 #include <linux/io.h>
33 #include <linux/fb.h>
34 #include <linux/pci.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/uaccess.h>
38 #include <linux/module.h>
39 #include <linux/console.h>
40 #include <linux/screen_info.h>
41 
42 #ifdef CONFIG_PM
43 #include <linux/pm.h>
44 #include <linux/module.h>
45 #endif
46 
47 #include "smtcfb.h"
48 
49 #ifdef DEBUG
50 #define smdbg(format, arg...) printk(KERN_DEBUG format , ## arg)
51 #else
52 #define smdbg(format, arg...)
53 #endif
54 
55 struct screen_info smtc_screen_info;
56 
57 /*
58 * Private structure
59 */
60 struct smtcfb_info {
61 	/*
62 	 * The following is a pointer to be passed into the
63 	 * functions below.  The modules outside the main
64 	 * voyager.c driver have no knowledge as to what
65 	 * is within this structure.
66 	 */
67 	struct fb_info fb;
68 	struct display_switch *dispsw;
69 	struct pci_dev *dev;
70 	signed int currcon;
71 
72 	struct {
73 		u8 red, green, blue;
74 	} palette[NR_RGB];
75 
76 	u_int palette_size;
77 };
78 
79 struct par_info {
80 	/*
81 	 * Hardware
82 	 */
83 	u16 chipID;
84 	unsigned char __iomem *m_pMMIO;
85 	char __iomem *m_pLFB;
86 	char *m_pDPR;
87 	char *m_pVPR;
88 	char *m_pCPR;
89 
90 	u_int width;
91 	u_int height;
92 	u_int hz;
93 	u_long BaseAddressInVRAM;
94 	u8 chipRevID;
95 };
96 
97 struct vesa_mode_table	{
98 	char mode_index[6];
99 	u16 lfb_width;
100 	u16 lfb_height;
101 	u16 lfb_depth;
102 };
103 
104 static struct vesa_mode_table vesa_mode[] = {
105 	{"0x301", 640,  480,  8},
106 	{"0x303", 800,  600,  8},
107 	{"0x305", 1024, 768,  8},
108 	{"0x307", 1280, 1024, 8},
109 
110 	{"0x311", 640,  480,  16},
111 	{"0x314", 800,  600,  16},
112 	{"0x317", 1024, 768,  16},
113 	{"0x31A", 1280, 1024, 16},
114 
115 	{"0x312", 640,  480,  24},
116 	{"0x315", 800,  600,  24},
117 	{"0x318", 1024, 768,  24},
118 	{"0x31B", 1280, 1024, 24},
119 };
120 
121 char __iomem *smtc_RegBaseAddress;	/* Memory Map IO starting address */
122 char __iomem *smtc_VRAMBaseAddress;	/* video memory starting address */
123 
124 static u32 colreg[17];
125 static struct par_info hw;	/* hardware information */
126 
127 u16 smtc_ChipIDs[] = {
128 	0x710,
129 	0x712,
130 	0x720
131 };
132 
133 #define numSMTCchipIDs ARRAY_SIZE(smtc_ChipIDs)
134 
135 static struct fb_var_screeninfo smtcfb_var = {
136 	.xres           = 1024,
137 	.yres           = 600,
138 	.xres_virtual   = 1024,
139 	.yres_virtual   = 600,
140 	.bits_per_pixel = 16,
141 	.red            = {16, 8, 0},
142 	.green          = {8, 8, 0},
143 	.blue           = {0, 8, 0},
144 	.activate       = FB_ACTIVATE_NOW,
145 	.height         = -1,
146 	.width          = -1,
147 	.vmode          = FB_VMODE_NONINTERLACED,
148 };
149 
150 static struct fb_fix_screeninfo smtcfb_fix = {
151 	.id             = "sm712fb",
152 	.type           = FB_TYPE_PACKED_PIXELS,
153 	.visual         = FB_VISUAL_TRUECOLOR,
154 	.line_length    = 800 * 3,
155 	.accel          = FB_ACCEL_SMI_LYNX,
156 };
157 
sm712_set_timing(struct smtcfb_info * sfb,struct par_info * ppar_info)158 static void sm712_set_timing(struct smtcfb_info *sfb,
159 			     struct par_info *ppar_info)
160 {
161 	int i = 0, j = 0;
162 	u32 m_nScreenStride;
163 
164 	smdbg("\nppar_info->width = %d ppar_info->height = %d"
165 			"sfb->fb.var.bits_per_pixel = %d ppar_info->hz = %d\n",
166 			ppar_info->width, ppar_info->height,
167 			sfb->fb.var.bits_per_pixel, ppar_info->hz);
168 
169 	for (j = 0; j < numVGAModes; j++) {
170 		if (VGAMode[j].mmSizeX == ppar_info->width &&
171 		    VGAMode[j].mmSizeY == ppar_info->height &&
172 		    VGAMode[j].bpp == sfb->fb.var.bits_per_pixel &&
173 		    VGAMode[j].hz == ppar_info->hz) {
174 
175 			smdbg("\nVGAMode[j].mmSizeX  = %d VGAMode[j].mmSizeY ="
176 					"%d VGAMode[j].bpp = %d"
177 					"VGAMode[j].hz=%d\n",
178 					VGAMode[j].mmSizeX, VGAMode[j].mmSizeY,
179 					VGAMode[j].bpp, VGAMode[j].hz);
180 
181 			smdbg("VGAMode index=%d\n", j);
182 
183 			smtc_mmiowb(0x0, 0x3c6);
184 
185 			smtc_seqw(0, 0x1);
186 
187 			smtc_mmiowb(VGAMode[j].Init_MISC, 0x3c2);
188 
189 			/* init SEQ register SR00 - SR04 */
190 			for (i = 0; i < SIZE_SR00_SR04; i++)
191 				smtc_seqw(i, VGAMode[j].Init_SR00_SR04[i]);
192 
193 			/* init SEQ register SR10 - SR24 */
194 			for (i = 0; i < SIZE_SR10_SR24; i++)
195 				smtc_seqw(i + 0x10,
196 					  VGAMode[j].Init_SR10_SR24[i]);
197 
198 			/* init SEQ register SR30 - SR75 */
199 			for (i = 0; i < SIZE_SR30_SR75; i++)
200 				if (((i + 0x30) != 0x62) \
201 					&& ((i + 0x30) != 0x6a) \
202 					&& ((i + 0x30) != 0x6b))
203 					smtc_seqw(i + 0x30,
204 						VGAMode[j].Init_SR30_SR75[i]);
205 
206 			/* init SEQ register SR80 - SR93 */
207 			for (i = 0; i < SIZE_SR80_SR93; i++)
208 				smtc_seqw(i + 0x80,
209 					  VGAMode[j].Init_SR80_SR93[i]);
210 
211 			/* init SEQ register SRA0 - SRAF */
212 			for (i = 0; i < SIZE_SRA0_SRAF; i++)
213 				smtc_seqw(i + 0xa0,
214 					  VGAMode[j].Init_SRA0_SRAF[i]);
215 
216 			/* init Graphic register GR00 - GR08 */
217 			for (i = 0; i < SIZE_GR00_GR08; i++)
218 				smtc_grphw(i, VGAMode[j].Init_GR00_GR08[i]);
219 
220 			/* init Attribute register AR00 - AR14 */
221 			for (i = 0; i < SIZE_AR00_AR14; i++)
222 				smtc_attrw(i, VGAMode[j].Init_AR00_AR14[i]);
223 
224 			/* init CRTC register CR00 - CR18 */
225 			for (i = 0; i < SIZE_CR00_CR18; i++)
226 				smtc_crtcw(i, VGAMode[j].Init_CR00_CR18[i]);
227 
228 			/* init CRTC register CR30 - CR4D */
229 			for (i = 0; i < SIZE_CR30_CR4D; i++)
230 				smtc_crtcw(i + 0x30,
231 					   VGAMode[j].Init_CR30_CR4D[i]);
232 
233 			/* init CRTC register CR90 - CRA7 */
234 			for (i = 0; i < SIZE_CR90_CRA7; i++)
235 				smtc_crtcw(i + 0x90,
236 					   VGAMode[j].Init_CR90_CRA7[i]);
237 		}
238 	}
239 	smtc_mmiowb(0x67, 0x3c2);
240 
241 	/* set VPR registers */
242 	writel(0x0, ppar_info->m_pVPR + 0x0C);
243 	writel(0x0, ppar_info->m_pVPR + 0x40);
244 
245 	/* set data width */
246 	m_nScreenStride =
247 		(ppar_info->width * sfb->fb.var.bits_per_pixel) / 64;
248 	switch (sfb->fb.var.bits_per_pixel) {
249 	case 8:
250 		writel(0x0, ppar_info->m_pVPR + 0x0);
251 		break;
252 	case 16:
253 		writel(0x00020000, ppar_info->m_pVPR + 0x0);
254 		break;
255 	case 24:
256 		writel(0x00040000, ppar_info->m_pVPR + 0x0);
257 		break;
258 	case 32:
259 		writel(0x00030000, ppar_info->m_pVPR + 0x0);
260 		break;
261 	}
262 	writel((u32) (((m_nScreenStride + 2) << 16) | m_nScreenStride),
263 	       ppar_info->m_pVPR + 0x10);
264 
265 }
266 
sm712_setpalette(int regno,unsigned red,unsigned green,unsigned blue,struct fb_info * info)267 static void sm712_setpalette(int regno, unsigned red, unsigned green,
268 			     unsigned blue, struct fb_info *info)
269 {
270 	struct par_info *cur_par = (struct par_info *)info->par;
271 
272 	if (cur_par->BaseAddressInVRAM)
273 		/*
274 		 * second display palette for dual head. Enable CRT RAM, 6-bit
275 		 * RAM
276 		 */
277 		smtc_seqw(0x66, (smtc_seqr(0x66) & 0xC3) | 0x20);
278 	else
279 		/* primary display palette. Enable LCD RAM only, 6-bit RAM */
280 		smtc_seqw(0x66, (smtc_seqr(0x66) & 0xC3) | 0x10);
281 	smtc_mmiowb(regno, dac_reg);
282 	smtc_mmiowb(red >> 10, dac_val);
283 	smtc_mmiowb(green >> 10, dac_val);
284 	smtc_mmiowb(blue >> 10, dac_val);
285 }
286 
smtc_set_timing(struct smtcfb_info * sfb,struct par_info * ppar_info)287 static void smtc_set_timing(struct smtcfb_info *sfb, struct par_info
288 		*ppar_info)
289 {
290 	switch (ppar_info->chipID) {
291 	case 0x710:
292 	case 0x712:
293 	case 0x720:
294 		sm712_set_timing(sfb, ppar_info);
295 		break;
296 	}
297 }
298 
299 /* chan_to_field
300  *
301  * convert a colour value into a field position
302  *
303  * from pxafb.c
304  */
305 
chan_to_field(unsigned int chan,struct fb_bitfield * bf)306 static inline unsigned int chan_to_field(unsigned int chan,
307 					 struct fb_bitfield *bf)
308 {
309 	chan &= 0xffff;
310 	chan >>= 16 - bf->length;
311 	return chan << bf->offset;
312 }
313 
cfb_blank(int blank_mode,struct fb_info * info)314 static int cfb_blank(int blank_mode, struct fb_info *info)
315 {
316 	/* clear DPMS setting */
317 	switch (blank_mode) {
318 	case FB_BLANK_UNBLANK:
319 		/* Screen On: HSync: On, VSync : On */
320 		smtc_seqw(0x01, (smtc_seqr(0x01) & (~0x20)));
321 		smtc_seqw(0x6a, 0x16);
322 		smtc_seqw(0x6b, 0x02);
323 		smtc_seqw(0x21, (smtc_seqr(0x21) & 0x77));
324 		smtc_seqw(0x22, (smtc_seqr(0x22) & (~0x30)));
325 		smtc_seqw(0x23, (smtc_seqr(0x23) & (~0xc0)));
326 		smtc_seqw(0x24, (smtc_seqr(0x24) | 0x01));
327 		smtc_seqw(0x31, (smtc_seqr(0x31) | 0x03));
328 		break;
329 	case FB_BLANK_NORMAL:
330 		/* Screen Off: HSync: On, VSync : On   Soft blank */
331 		smtc_seqw(0x01, (smtc_seqr(0x01) & (~0x20)));
332 		smtc_seqw(0x6a, 0x16);
333 		smtc_seqw(0x6b, 0x02);
334 		smtc_seqw(0x22, (smtc_seqr(0x22) & (~0x30)));
335 		smtc_seqw(0x23, (smtc_seqr(0x23) & (~0xc0)));
336 		smtc_seqw(0x24, (smtc_seqr(0x24) | 0x01));
337 		smtc_seqw(0x31, ((smtc_seqr(0x31) & (~0x07)) | 0x00));
338 		break;
339 	case FB_BLANK_VSYNC_SUSPEND:
340 		/* Screen On: HSync: On, VSync : Off */
341 		smtc_seqw(0x01, (smtc_seqr(0x01) | 0x20));
342 		smtc_seqw(0x20, (smtc_seqr(0x20) & (~0xB0)));
343 		smtc_seqw(0x6a, 0x0c);
344 		smtc_seqw(0x6b, 0x02);
345 		smtc_seqw(0x21, (smtc_seqr(0x21) | 0x88));
346 		smtc_seqw(0x22, ((smtc_seqr(0x22) & (~0x30)) | 0x20));
347 		smtc_seqw(0x23, ((smtc_seqr(0x23) & (~0xc0)) | 0x20));
348 		smtc_seqw(0x24, (smtc_seqr(0x24) & (~0x01)));
349 		smtc_seqw(0x31, ((smtc_seqr(0x31) & (~0x07)) | 0x00));
350 		smtc_seqw(0x34, (smtc_seqr(0x34) | 0x80));
351 		break;
352 	case FB_BLANK_HSYNC_SUSPEND:
353 		/* Screen On: HSync: Off, VSync : On */
354 		smtc_seqw(0x01, (smtc_seqr(0x01) | 0x20));
355 		smtc_seqw(0x20, (smtc_seqr(0x20) & (~0xB0)));
356 		smtc_seqw(0x6a, 0x0c);
357 		smtc_seqw(0x6b, 0x02);
358 		smtc_seqw(0x21, (smtc_seqr(0x21) | 0x88));
359 		smtc_seqw(0x22, ((smtc_seqr(0x22) & (~0x30)) | 0x10));
360 		smtc_seqw(0x23, ((smtc_seqr(0x23) & (~0xc0)) | 0xD8));
361 		smtc_seqw(0x24, (smtc_seqr(0x24) & (~0x01)));
362 		smtc_seqw(0x31, ((smtc_seqr(0x31) & (~0x07)) | 0x00));
363 		smtc_seqw(0x34, (smtc_seqr(0x34) | 0x80));
364 		break;
365 	case FB_BLANK_POWERDOWN:
366 		/* Screen On: HSync: Off, VSync : Off */
367 		smtc_seqw(0x01, (smtc_seqr(0x01) | 0x20));
368 		smtc_seqw(0x20, (smtc_seqr(0x20) & (~0xB0)));
369 		smtc_seqw(0x6a, 0x0c);
370 		smtc_seqw(0x6b, 0x02);
371 		smtc_seqw(0x21, (smtc_seqr(0x21) | 0x88));
372 		smtc_seqw(0x22, ((smtc_seqr(0x22) & (~0x30)) | 0x30));
373 		smtc_seqw(0x23, ((smtc_seqr(0x23) & (~0xc0)) | 0xD8));
374 		smtc_seqw(0x24, (smtc_seqr(0x24) & (~0x01)));
375 		smtc_seqw(0x31, ((smtc_seqr(0x31) & (~0x07)) | 0x00));
376 		smtc_seqw(0x34, (smtc_seqr(0x34) | 0x80));
377 		break;
378 	default:
379 		return -EINVAL;
380 	}
381 
382 	return 0;
383 }
384 
smtc_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned trans,struct fb_info * info)385 static int smtc_setcolreg(unsigned regno, unsigned red, unsigned green,
386 			  unsigned blue, unsigned trans, struct fb_info *info)
387 {
388 	struct smtcfb_info *sfb = (struct smtcfb_info *)info;
389 	u32 val;
390 
391 	if (regno > 255)
392 		return 1;
393 
394 	switch (sfb->fb.fix.visual) {
395 	case FB_VISUAL_DIRECTCOLOR:
396 	case FB_VISUAL_TRUECOLOR:
397 		/*
398 		 * 16/32 bit true-colour, use pseuo-palette for 16 base color
399 		 */
400 		if (regno < 16) {
401 			if (sfb->fb.var.bits_per_pixel == 16) {
402 				u32 *pal = sfb->fb.pseudo_palette;
403 				val = chan_to_field(red, &sfb->fb.var.red);
404 				val |= chan_to_field(green, \
405 						&sfb->fb.var.green);
406 				val |= chan_to_field(blue, &sfb->fb.var.blue);
407 #ifdef __BIG_ENDIAN
408 				pal[regno] =
409 				    ((red & 0xf800) >> 8) |
410 				    ((green & 0xe000) >> 13) |
411 				    ((green & 0x1c00) << 3) |
412 				    ((blue & 0xf800) >> 3);
413 #else
414 				pal[regno] = val;
415 #endif
416 			} else {
417 				u32 *pal = sfb->fb.pseudo_palette;
418 				val = chan_to_field(red, &sfb->fb.var.red);
419 				val |= chan_to_field(green, \
420 						&sfb->fb.var.green);
421 				val |= chan_to_field(blue, &sfb->fb.var.blue);
422 #ifdef __BIG_ENDIAN
423 				val =
424 				    (val & 0xff00ff00 >> 8) |
425 				    (val & 0x00ff00ff << 8);
426 #endif
427 				pal[regno] = val;
428 			}
429 		}
430 		break;
431 
432 	case FB_VISUAL_PSEUDOCOLOR:
433 		/* color depth 8 bit */
434 		sm712_setpalette(regno, red, green, blue, info);
435 		break;
436 
437 	default:
438 		return 1;	/* unknown type */
439 	}
440 
441 	return 0;
442 
443 }
444 
445 #ifdef __BIG_ENDIAN
smtcfb_read(struct fb_info * info,char __user * buf,size_t count,loff_t * ppos)446 static ssize_t smtcfb_read(struct fb_info *info, char __user * buf, size_t
447 				count, loff_t *ppos)
448 {
449 	unsigned long p = *ppos;
450 
451 	u32 *buffer, *dst;
452 	u32 __iomem *src;
453 	int c, i, cnt = 0, err = 0;
454 	unsigned long total_size;
455 
456 	if (!info || !info->screen_base)
457 		return -ENODEV;
458 
459 	if (info->state != FBINFO_STATE_RUNNING)
460 		return -EPERM;
461 
462 	total_size = info->screen_size;
463 
464 	if (total_size == 0)
465 		total_size = info->fix.smem_len;
466 
467 	if (p >= total_size)
468 		return 0;
469 
470 	if (count >= total_size)
471 		count = total_size;
472 
473 	if (count + p > total_size)
474 		count = total_size - p;
475 
476 	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL);
477 	if (!buffer)
478 		return -ENOMEM;
479 
480 	src = (u32 __iomem *) (info->screen_base + p);
481 
482 	if (info->fbops->fb_sync)
483 		info->fbops->fb_sync(info);
484 
485 	while (count) {
486 		c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
487 		dst = buffer;
488 		for (i = c >> 2; i--;) {
489 			*dst = fb_readl(src++);
490 			*dst =
491 			    (*dst & 0xff00ff00 >> 8) |
492 			    (*dst & 0x00ff00ff << 8);
493 			dst++;
494 		}
495 		if (c & 3) {
496 			u8 *dst8 = (u8 *) dst;
497 			u8 __iomem *src8 = (u8 __iomem *) src;
498 
499 			for (i = c & 3; i--;) {
500 				if (i & 1) {
501 					*dst8++ = fb_readb(++src8);
502 				} else {
503 					*dst8++ = fb_readb(--src8);
504 					src8 += 2;
505 				}
506 			}
507 			src = (u32 __iomem *) src8;
508 		}
509 
510 		if (copy_to_user(buf, buffer, c)) {
511 			err = -EFAULT;
512 			break;
513 		}
514 		*ppos += c;
515 		buf += c;
516 		cnt += c;
517 		count -= c;
518 	}
519 
520 	kfree(buffer);
521 
522 	return (err) ? err : cnt;
523 }
524 
525 static ssize_t
smtcfb_write(struct fb_info * info,const char __user * buf,size_t count,loff_t * ppos)526 smtcfb_write(struct fb_info *info, const char __user *buf, size_t count,
527 	     loff_t *ppos)
528 {
529 	unsigned long p = *ppos;
530 
531 	u32 *buffer, *src;
532 	u32 __iomem *dst;
533 	int c, i, cnt = 0, err = 0;
534 	unsigned long total_size;
535 
536 	if (!info || !info->screen_base)
537 		return -ENODEV;
538 
539 	if (info->state != FBINFO_STATE_RUNNING)
540 		return -EPERM;
541 
542 	total_size = info->screen_size;
543 
544 	if (total_size == 0)
545 		total_size = info->fix.smem_len;
546 
547 	if (p > total_size)
548 		return -EFBIG;
549 
550 	if (count > total_size) {
551 		err = -EFBIG;
552 		count = total_size;
553 	}
554 
555 	if (count + p > total_size) {
556 		if (!err)
557 			err = -ENOSPC;
558 
559 		count = total_size - p;
560 	}
561 
562 	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL);
563 	if (!buffer)
564 		return -ENOMEM;
565 
566 	dst = (u32 __iomem *) (info->screen_base + p);
567 
568 	if (info->fbops->fb_sync)
569 		info->fbops->fb_sync(info);
570 
571 	while (count) {
572 		c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
573 		src = buffer;
574 
575 		if (copy_from_user(src, buf, c)) {
576 			err = -EFAULT;
577 			break;
578 		}
579 
580 		for (i = c >> 2; i--;) {
581 			fb_writel((*src & 0xff00ff00 >> 8) |
582 				  (*src & 0x00ff00ff << 8), dst++);
583 			src++;
584 		}
585 		if (c & 3) {
586 			u8 *src8 = (u8 *) src;
587 			u8 __iomem *dst8 = (u8 __iomem *) dst;
588 
589 			for (i = c & 3; i--;) {
590 				if (i & 1) {
591 					fb_writeb(*src8++, ++dst8);
592 				} else {
593 					fb_writeb(*src8++, --dst8);
594 					dst8 += 2;
595 				}
596 			}
597 			dst = (u32 __iomem *) dst8;
598 		}
599 
600 		*ppos += c;
601 		buf += c;
602 		cnt += c;
603 		count -= c;
604 	}
605 
606 	kfree(buffer);
607 
608 	return (cnt) ? cnt : err;
609 }
610 #endif	/* ! __BIG_ENDIAN */
611 
smtcfb_setmode(struct smtcfb_info * sfb)612 void smtcfb_setmode(struct smtcfb_info *sfb)
613 {
614 	switch (sfb->fb.var.bits_per_pixel) {
615 	case 32:
616 		sfb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
617 		sfb->fb.fix.line_length = sfb->fb.var.xres * 4;
618 		sfb->fb.var.red.length = 8;
619 		sfb->fb.var.green.length = 8;
620 		sfb->fb.var.blue.length = 8;
621 		sfb->fb.var.red.offset = 16;
622 		sfb->fb.var.green.offset = 8;
623 		sfb->fb.var.blue.offset = 0;
624 
625 		break;
626 	case 8:
627 		sfb->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
628 		sfb->fb.fix.line_length = sfb->fb.var.xres;
629 		sfb->fb.var.red.offset = 5;
630 		sfb->fb.var.red.length = 3;
631 		sfb->fb.var.green.offset = 2;
632 		sfb->fb.var.green.length = 3;
633 		sfb->fb.var.blue.offset = 0;
634 		sfb->fb.var.blue.length = 2;
635 		break;
636 	case 24:
637 		sfb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
638 		sfb->fb.fix.line_length = sfb->fb.var.xres * 3;
639 		sfb->fb.var.red.length = 8;
640 		sfb->fb.var.green.length = 8;
641 		sfb->fb.var.blue.length = 8;
642 
643 		sfb->fb.var.red.offset = 16;
644 		sfb->fb.var.green.offset = 8;
645 		sfb->fb.var.blue.offset = 0;
646 
647 		break;
648 	case 16:
649 	default:
650 		sfb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
651 		sfb->fb.fix.line_length = sfb->fb.var.xres * 2;
652 
653 		sfb->fb.var.red.length = 5;
654 		sfb->fb.var.green.length = 6;
655 		sfb->fb.var.blue.length = 5;
656 
657 		sfb->fb.var.red.offset = 11;
658 		sfb->fb.var.green.offset = 5;
659 		sfb->fb.var.blue.offset = 0;
660 
661 		break;
662 	}
663 
664 	hw.width = sfb->fb.var.xres;
665 	hw.height = sfb->fb.var.yres;
666 	hw.hz = 60;
667 	smtc_set_timing(sfb, &hw);
668 }
669 
smtc_check_var(struct fb_var_screeninfo * var,struct fb_info * info)670 static int smtc_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
671 {
672 	/* sanity checks */
673 	if (var->xres_virtual < var->xres)
674 		var->xres_virtual = var->xres;
675 
676 	if (var->yres_virtual < var->yres)
677 		var->yres_virtual = var->yres;
678 
679 	/* set valid default bpp */
680 	if ((var->bits_per_pixel != 8)  && (var->bits_per_pixel != 16) &&
681 	    (var->bits_per_pixel != 24) && (var->bits_per_pixel != 32))
682 		var->bits_per_pixel = 16;
683 
684 	return 0;
685 }
686 
smtc_set_par(struct fb_info * info)687 static int smtc_set_par(struct fb_info *info)
688 {
689 	struct smtcfb_info *sfb = (struct smtcfb_info *)info;
690 
691 	smtcfb_setmode(sfb);
692 
693 	return 0;
694 }
695 
696 static struct fb_ops smtcfb_ops = {
697 	.owner        = THIS_MODULE,
698 	.fb_check_var = smtc_check_var,
699 	.fb_set_par   = smtc_set_par,
700 	.fb_setcolreg = smtc_setcolreg,
701 	.fb_blank     = cfb_blank,
702 	.fb_fillrect  = cfb_fillrect,
703 	.fb_imageblit = cfb_imageblit,
704 	.fb_copyarea  = cfb_copyarea,
705 #ifdef __BIG_ENDIAN
706 	.fb_read      = smtcfb_read,
707 	.fb_write     = smtcfb_write,
708 #endif
709 };
710 
711 /*
712  * Alloc struct smtcfb_info and assign the default value
713  */
smtc_alloc_fb_info(struct pci_dev * dev,char * name)714 static struct smtcfb_info *smtc_alloc_fb_info(struct pci_dev *dev,
715 							char *name)
716 {
717 	struct smtcfb_info *sfb;
718 
719 	sfb = kzalloc(sizeof(*sfb), GFP_KERNEL);
720 
721 	if (!sfb)
722 		return NULL;
723 
724 	sfb->currcon = -1;
725 	sfb->dev = dev;
726 
727 	/*** Init sfb->fb with default value ***/
728 	sfb->fb.flags = FBINFO_FLAG_DEFAULT;
729 	sfb->fb.fbops = &smtcfb_ops;
730 	sfb->fb.var = smtcfb_var;
731 	sfb->fb.fix = smtcfb_fix;
732 
733 	strcpy(sfb->fb.fix.id, name);
734 
735 	sfb->fb.fix.type = FB_TYPE_PACKED_PIXELS;
736 	sfb->fb.fix.type_aux = 0;
737 	sfb->fb.fix.xpanstep = 0;
738 	sfb->fb.fix.ypanstep = 0;
739 	sfb->fb.fix.ywrapstep = 0;
740 	sfb->fb.fix.accel = FB_ACCEL_SMI_LYNX;
741 
742 	sfb->fb.var.nonstd = 0;
743 	sfb->fb.var.activate = FB_ACTIVATE_NOW;
744 	sfb->fb.var.height = -1;
745 	sfb->fb.var.width = -1;
746 	/* text mode acceleration */
747 	sfb->fb.var.accel_flags = FB_ACCELF_TEXT;
748 	sfb->fb.var.vmode = FB_VMODE_NONINTERLACED;
749 	sfb->fb.par = &hw;
750 	sfb->fb.pseudo_palette = colreg;
751 
752 	return sfb;
753 }
754 
755 /*
756  * Unmap in the memory mapped IO registers
757  */
758 
smtc_unmap_mmio(struct smtcfb_info * sfb)759 static void smtc_unmap_mmio(struct smtcfb_info *sfb)
760 {
761 	if (sfb && smtc_RegBaseAddress)
762 		smtc_RegBaseAddress = NULL;
763 }
764 
765 /*
766  * Map in the screen memory
767  */
768 
smtc_map_smem(struct smtcfb_info * sfb,struct pci_dev * dev,u_long smem_len)769 static int smtc_map_smem(struct smtcfb_info *sfb,
770 		struct pci_dev *dev, u_long smem_len)
771 {
772 	if (sfb->fb.var.bits_per_pixel == 32) {
773 #ifdef __BIG_ENDIAN
774 		sfb->fb.fix.smem_start = pci_resource_start(dev, 0)
775 			+ 0x800000;
776 #else
777 		sfb->fb.fix.smem_start = pci_resource_start(dev, 0);
778 #endif
779 	} else {
780 		sfb->fb.fix.smem_start = pci_resource_start(dev, 0);
781 	}
782 
783 	sfb->fb.fix.smem_len = smem_len;
784 
785 	sfb->fb.screen_base = smtc_VRAMBaseAddress;
786 
787 	if (!sfb->fb.screen_base) {
788 		printk(KERN_ERR "%s: unable to map screen memory\n",
789 				sfb->fb.fix.id);
790 		return -ENOMEM;
791 	}
792 
793 	return 0;
794 }
795 
796 /*
797  * Unmap in the screen memory
798  *
799  */
smtc_unmap_smem(struct smtcfb_info * sfb)800 static void smtc_unmap_smem(struct smtcfb_info *sfb)
801 {
802 	if (sfb && sfb->fb.screen_base) {
803 		iounmap(sfb->fb.screen_base);
804 		sfb->fb.screen_base = NULL;
805 	}
806 }
807 
808 /*
809  * We need to wake up the LynxEM+, and make sure its in linear memory mode.
810  */
sm7xx_init_hw(void)811 static inline void sm7xx_init_hw(void)
812 {
813 	outb_p(0x18, 0x3c4);
814 	outb_p(0x11, 0x3c5);
815 }
816 
smtc_free_fb_info(struct smtcfb_info * sfb)817 static void smtc_free_fb_info(struct smtcfb_info *sfb)
818 {
819 	if (sfb) {
820 		fb_alloc_cmap(&sfb->fb.cmap, 0, 0);
821 		kfree(sfb);
822 	}
823 }
824 
825 /*
826  *	sm712vga_setup - process command line options, get vga parameter
827  *	@options: string of options
828  *	Returns zero.
829  *
830  */
sm712vga_setup(char * options)831 static int __init sm712vga_setup(char *options)
832 {
833 	int index;
834 
835 	if (!options || !*options) {
836 		smdbg("\n No vga parameter\n");
837 		return -EINVAL;
838 	}
839 
840 	smtc_screen_info.lfb_width = 0;
841 	smtc_screen_info.lfb_height = 0;
842 	smtc_screen_info.lfb_depth = 0;
843 
844 	smdbg("\nsm712vga_setup = %s\n", options);
845 
846 	for (index = 0;
847 	     index < ARRAY_SIZE(vesa_mode);
848 	     index++) {
849 		if (strstr(options, vesa_mode[index].mode_index)) {
850 			smtc_screen_info.lfb_width = vesa_mode[index].lfb_width;
851 			smtc_screen_info.lfb_height =
852 					vesa_mode[index].lfb_height;
853 			smtc_screen_info.lfb_depth = vesa_mode[index].lfb_depth;
854 			return 0;
855 		}
856 	}
857 
858 	return -1;
859 }
860 __setup("vga=", sm712vga_setup);
861 
862 /* Jason (08/13/2009)
863  * Original init function changed to probe method to be used by pci_drv
864  * process used to detect chips replaced with kernel process in pci_drv
865  */
smtcfb_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)866 static int __devinit smtcfb_pci_probe(struct pci_dev *pdev,
867 				   const struct pci_device_id *ent)
868 {
869 	struct smtcfb_info *sfb;
870 	u_long smem_size = 0x00800000;	/* default 8MB */
871 	char name[16];
872 	int err;
873 	unsigned long pFramebufferPhysical;
874 
875 	printk(KERN_INFO
876 		"Silicon Motion display driver " SMTC_LINUX_FB_VERSION "\n");
877 
878 	err = pci_enable_device(pdev);	/* enable SMTC chip */
879 	if (err)
880 		return err;
881 
882 	hw.chipID = ent->device;
883 	sprintf(name, "sm%Xfb", hw.chipID);
884 
885 	sfb = smtc_alloc_fb_info(pdev, name);
886 
887 	if (!sfb)
888 		goto failed_free;
889 	/* Jason (08/13/2009)
890 	 * Store fb_info to be further used when suspending and resuming
891 	 */
892 	pci_set_drvdata(pdev, sfb);
893 
894 	sm7xx_init_hw();
895 
896 	/*get mode parameter from smtc_screen_info */
897 	if (smtc_screen_info.lfb_width != 0) {
898 		sfb->fb.var.xres = smtc_screen_info.lfb_width;
899 		sfb->fb.var.yres = smtc_screen_info.lfb_height;
900 		sfb->fb.var.bits_per_pixel = smtc_screen_info.lfb_depth;
901 	} else {
902 		/* default resolution 1024x600 16bit mode */
903 		sfb->fb.var.xres = SCREEN_X_RES;
904 		sfb->fb.var.yres = SCREEN_Y_RES;
905 		sfb->fb.var.bits_per_pixel = SCREEN_BPP;
906 	}
907 
908 #ifdef __BIG_ENDIAN
909 	if (sfb->fb.var.bits_per_pixel == 24)
910 		sfb->fb.var.bits_per_pixel = (smtc_screen_info.lfb_depth = 32);
911 #endif
912 	/* Map address and memory detection */
913 	pFramebufferPhysical = pci_resource_start(pdev, 0);
914 	pci_read_config_byte(pdev, PCI_REVISION_ID, &hw.chipRevID);
915 
916 	switch (hw.chipID) {
917 	case 0x710:
918 	case 0x712:
919 		sfb->fb.fix.mmio_start = pFramebufferPhysical + 0x00400000;
920 		sfb->fb.fix.mmio_len = 0x00400000;
921 		smem_size = SM712_VIDEOMEMORYSIZE;
922 #ifdef __BIG_ENDIAN
923 		hw.m_pLFB = (smtc_VRAMBaseAddress =
924 		    ioremap(pFramebufferPhysical, 0x00c00000));
925 #else
926 		hw.m_pLFB = (smtc_VRAMBaseAddress =
927 		    ioremap(pFramebufferPhysical, 0x00800000));
928 #endif
929 		hw.m_pMMIO = (smtc_RegBaseAddress =
930 		    smtc_VRAMBaseAddress + 0x00700000);
931 		hw.m_pDPR = smtc_VRAMBaseAddress + 0x00408000;
932 		hw.m_pVPR = hw.m_pLFB + 0x0040c000;
933 #ifdef __BIG_ENDIAN
934 		if (sfb->fb.var.bits_per_pixel == 32) {
935 			smtc_VRAMBaseAddress += 0x800000;
936 			hw.m_pLFB += 0x800000;
937 			printk(KERN_INFO
938 				"\nsmtc_VRAMBaseAddress=%p hw.m_pLFB=%p\n",
939 					smtc_VRAMBaseAddress, hw.m_pLFB);
940 		}
941 #endif
942 		if (!smtc_RegBaseAddress) {
943 			printk(KERN_ERR
944 				"%s: unable to map memory mapped IO\n",
945 				sfb->fb.fix.id);
946 			err = -ENOMEM;
947 			goto failed_fb;
948 		}
949 
950 		/* set MCLK = 14.31818 * (0x16 / 0x2) */
951 		smtc_seqw(0x6a, 0x16);
952 		smtc_seqw(0x6b, 0x02);
953 		smtc_seqw(0x62, 0x3e);
954 		/* enable PCI burst */
955 		smtc_seqw(0x17, 0x20);
956 		/* enable word swap */
957 #ifdef __BIG_ENDIAN
958 		if (sfb->fb.var.bits_per_pixel == 32)
959 			smtc_seqw(0x17, 0x30);
960 #endif
961 		break;
962 	case 0x720:
963 		sfb->fb.fix.mmio_start = pFramebufferPhysical;
964 		sfb->fb.fix.mmio_len = 0x00200000;
965 		smem_size = SM722_VIDEOMEMORYSIZE;
966 		hw.m_pDPR = ioremap(pFramebufferPhysical, 0x00a00000);
967 		hw.m_pLFB = (smtc_VRAMBaseAddress =
968 		    hw.m_pDPR + 0x00200000);
969 		hw.m_pMMIO = (smtc_RegBaseAddress =
970 		    hw.m_pDPR + 0x000c0000);
971 		hw.m_pVPR = hw.m_pDPR + 0x800;
972 
973 		smtc_seqw(0x62, 0xff);
974 		smtc_seqw(0x6a, 0x0d);
975 		smtc_seqw(0x6b, 0x02);
976 		break;
977 	default:
978 		printk(KERN_ERR
979 		"No valid Silicon Motion display chip was detected!\n");
980 
981 		goto failed_fb;
982 	}
983 
984 	/* can support 32 bpp */
985 	if (15 == sfb->fb.var.bits_per_pixel)
986 		sfb->fb.var.bits_per_pixel = 16;
987 
988 	sfb->fb.var.xres_virtual = sfb->fb.var.xres;
989 	sfb->fb.var.yres_virtual = sfb->fb.var.yres;
990 	err = smtc_map_smem(sfb, pdev, smem_size);
991 	if (err)
992 		goto failed;
993 
994 	smtcfb_setmode(sfb);
995 	/* Primary display starting from 0 position */
996 	hw.BaseAddressInVRAM = 0;
997 	sfb->fb.par = &hw;
998 
999 	err = register_framebuffer(&sfb->fb);
1000 	if (err < 0)
1001 		goto failed;
1002 
1003 	printk(KERN_INFO "Silicon Motion SM%X Rev%X primary display mode"
1004 			"%dx%d-%d Init Complete.\n", hw.chipID, hw.chipRevID,
1005 			sfb->fb.var.xres, sfb->fb.var.yres,
1006 			sfb->fb.var.bits_per_pixel);
1007 
1008 	return 0;
1009 
1010 failed:
1011 	printk(KERN_ERR "Silicon Motion, Inc.  primary display init fail\n");
1012 
1013 	smtc_unmap_smem(sfb);
1014 	smtc_unmap_mmio(sfb);
1015 failed_fb:
1016 	smtc_free_fb_info(sfb);
1017 
1018 failed_free:
1019 	pci_disable_device(pdev);
1020 
1021 	return err;
1022 }
1023 
1024 
1025 /* Jason (08/11/2009) PCI_DRV wrapper essential structs */
1026 static DEFINE_PCI_DEVICE_TABLE(smtcfb_pci_table) = {
1027 	{ PCI_DEVICE(0x126f, 0x710), },
1028 	{ PCI_DEVICE(0x126f, 0x712), },
1029 	{ PCI_DEVICE(0x126f, 0x720), },
1030 	{0,}
1031 };
1032 
1033 
1034 /* Jason (08/14/2009)
1035  * do some clean up when the driver module is removed
1036  */
smtcfb_pci_remove(struct pci_dev * pdev)1037 static void __devexit smtcfb_pci_remove(struct pci_dev *pdev)
1038 {
1039 	struct smtcfb_info *sfb;
1040 
1041 	sfb = pci_get_drvdata(pdev);
1042 	pci_set_drvdata(pdev, NULL);
1043 	smtc_unmap_smem(sfb);
1044 	smtc_unmap_mmio(sfb);
1045 	unregister_framebuffer(&sfb->fb);
1046 	smtc_free_fb_info(sfb);
1047 }
1048 
1049 #ifdef CONFIG_PM
smtcfb_pci_suspend(struct device * device)1050 static int smtcfb_pci_suspend(struct device *device)
1051 {
1052 	struct pci_dev *pdev = to_pci_dev(device);
1053 	struct smtcfb_info *sfb;
1054 
1055 	sfb = pci_get_drvdata(pdev);
1056 
1057 	/* set the hw in sleep mode use externel clock and self memory refresh
1058 	 * so that we can turn off internal PLLs later on
1059 	 */
1060 	smtc_seqw(0x20, (smtc_seqr(0x20) | 0xc0));
1061 	smtc_seqw(0x69, (smtc_seqr(0x69) & 0xf7));
1062 
1063 	console_lock();
1064 	fb_set_suspend(&sfb->fb, 1);
1065 	console_unlock();
1066 
1067 	/* additionally turn off all function blocks including internal PLLs */
1068 	smtc_seqw(0x21, 0xff);
1069 
1070 	return 0;
1071 }
1072 
smtcfb_pci_resume(struct device * device)1073 static int smtcfb_pci_resume(struct device *device)
1074 {
1075 	struct pci_dev *pdev = to_pci_dev(device);
1076 	struct smtcfb_info *sfb;
1077 
1078 	sfb = pci_get_drvdata(pdev);
1079 
1080 	/* reinit hardware */
1081 	sm7xx_init_hw();
1082 	switch (hw.chipID) {
1083 	case 0x710:
1084 	case 0x712:
1085 		/* set MCLK = 14.31818 *  (0x16 / 0x2) */
1086 		smtc_seqw(0x6a, 0x16);
1087 		smtc_seqw(0x6b, 0x02);
1088 		smtc_seqw(0x62, 0x3e);
1089 		/* enable PCI burst */
1090 		smtc_seqw(0x17, 0x20);
1091 #ifdef __BIG_ENDIAN
1092 		if (sfb->fb.var.bits_per_pixel == 32)
1093 			smtc_seqw(0x17, 0x30);
1094 #endif
1095 		break;
1096 	case 0x720:
1097 		smtc_seqw(0x62, 0xff);
1098 		smtc_seqw(0x6a, 0x0d);
1099 		smtc_seqw(0x6b, 0x02);
1100 		break;
1101 	}
1102 
1103 	smtc_seqw(0x34, (smtc_seqr(0x34) | 0xc0));
1104 	smtc_seqw(0x33, ((smtc_seqr(0x33) | 0x08) & 0xfb));
1105 
1106 	smtcfb_setmode(sfb);
1107 
1108 	console_lock();
1109 	fb_set_suspend(&sfb->fb, 0);
1110 	console_unlock();
1111 
1112 	return 0;
1113 }
1114 
1115 static const struct dev_pm_ops sm7xx_pm_ops = {
1116 	.suspend = smtcfb_pci_suspend,
1117 	.resume = smtcfb_pci_resume,
1118 	.freeze = smtcfb_pci_suspend,
1119 	.thaw = smtcfb_pci_resume,
1120 	.poweroff = smtcfb_pci_suspend,
1121 	.restore = smtcfb_pci_resume,
1122 };
1123 
1124 #define SM7XX_PM_OPS (&sm7xx_pm_ops)
1125 
1126 #else  /* !CONFIG_PM */
1127 
1128 #define SM7XX_PM_OPS NULL
1129 
1130 #endif /* !CONFIG_PM */
1131 
1132 static struct pci_driver smtcfb_driver = {
1133 	.name = "smtcfb",
1134 	.id_table = smtcfb_pci_table,
1135 	.probe = smtcfb_pci_probe,
1136 	.remove = __devexit_p(smtcfb_pci_remove),
1137 	.driver.pm  = SM7XX_PM_OPS,
1138 };
1139 
smtcfb_init(void)1140 static int __init smtcfb_init(void)
1141 {
1142 	return pci_register_driver(&smtcfb_driver);
1143 }
1144 
smtcfb_exit(void)1145 static void __exit smtcfb_exit(void)
1146 {
1147 	pci_unregister_driver(&smtcfb_driver);
1148 }
1149 
1150 module_init(smtcfb_init);
1151 module_exit(smtcfb_exit);
1152 
1153 MODULE_AUTHOR("Siliconmotion ");
1154 MODULE_DESCRIPTION("Framebuffer driver for SMI Graphic Cards");
1155 MODULE_LICENSE("GPL");
1156