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Ben Dooks6a0e4ec2008-05-23 13:04:56 -07001/* linux/drivers/video/s3c2410fb.c
2 * Copyright (c) 2004,2005 Arnaud Patard
3 * Copyright (c) 2004-2008 Ben Dooks
4 *
5 * S3C2410 LCD Framebuffer Driver
Arnaud Patard20fd5762005-09-09 13:10:07 -07006 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive for
9 * more details.
10 *
Ben Dooks6a0e4ec2008-05-23 13:04:56 -070011 * Driver based on skeletonfb.c, sa1100fb.c and others.
12*/
Arnaud Patard20fd5762005-09-09 13:10:07 -070013
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/errno.h>
17#include <linux/string.h>
18#include <linux/mm.h>
Arnaud Patard20fd5762005-09-09 13:10:07 -070019#include <linux/slab.h>
20#include <linux/delay.h>
21#include <linux/fb.h>
22#include <linux/init.h>
23#include <linux/dma-mapping.h>
Arnaud Patard20fd5762005-09-09 13:10:07 -070024#include <linux/interrupt.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010025#include <linux/platform_device.h>
Russell Kingf8ce2542006-01-07 16:15:52 +000026#include <linux/clk.h>
Arnaud Patard20fd5762005-09-09 13:10:07 -070027
28#include <asm/io.h>
Arnaud Patard20fd5762005-09-09 13:10:07 -070029#include <asm/div64.h>
30
31#include <asm/mach/map.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010032#include <mach/regs-lcd.h>
33#include <mach/regs-gpio.h>
34#include <mach/fb.h>
Arnaud Patard20fd5762005-09-09 13:10:07 -070035
36#ifdef CONFIG_PM
37#include <linux/pm.h>
38#endif
39
40#include "s3c2410fb.h"
41
Arnaud Patard20fd5762005-09-09 13:10:07 -070042/* Debugging stuff */
43#ifdef CONFIG_FB_S3C2410_DEBUG
Krzysztof Heltb0831942007-10-16 01:28:54 -070044static int debug = 1;
Arnaud Patard20fd5762005-09-09 13:10:07 -070045#else
Krzysztof Heltb0831942007-10-16 01:28:54 -070046static int debug = 0;
Arnaud Patard20fd5762005-09-09 13:10:07 -070047#endif
48
49#define dprintk(msg...) if (debug) { printk(KERN_DEBUG "s3c2410fb: " msg); }
50
51/* useful functions */
52
Ben Dooksf62e7702008-02-06 01:39:41 -080053static int is_s3c2412(struct s3c2410fb_info *fbi)
54{
55 return (fbi->drv_type == DRV_S3C2412);
56}
57
Arnaud Patard20fd5762005-09-09 13:10:07 -070058/* s3c2410fb_set_lcdaddr
59 *
60 * initialise lcd controller address pointers
Krzysztof Heltb0831942007-10-16 01:28:54 -070061 */
Krzysztof Helt110c1fa2007-10-16 01:28:55 -070062static void s3c2410fb_set_lcdaddr(struct fb_info *info)
Arnaud Patard20fd5762005-09-09 13:10:07 -070063{
Arnaud Patard20fd5762005-09-09 13:10:07 -070064 unsigned long saddr1, saddr2, saddr3;
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -070065 struct s3c2410fb_info *fbi = info->par;
66 void __iomem *regs = fbi->io;
Arnaud Patard20fd5762005-09-09 13:10:07 -070067
Krzysztof Helt110c1fa2007-10-16 01:28:55 -070068 saddr1 = info->fix.smem_start >> 1;
69 saddr2 = info->fix.smem_start;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -070070 saddr2 += info->fix.line_length * info->var.yres;
Krzysztof Heltb0831942007-10-16 01:28:54 -070071 saddr2 >>= 1;
Arnaud Patard20fd5762005-09-09 13:10:07 -070072
Krzysztof Heltb0831942007-10-16 01:28:54 -070073 saddr3 = S3C2410_OFFSIZE(0) |
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -070074 S3C2410_PAGEWIDTH((info->fix.line_length / 2) & 0x3ff);
Arnaud Patard20fd5762005-09-09 13:10:07 -070075
76 dprintk("LCDSADDR1 = 0x%08lx\n", saddr1);
77 dprintk("LCDSADDR2 = 0x%08lx\n", saddr2);
78 dprintk("LCDSADDR3 = 0x%08lx\n", saddr3);
79
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -070080 writel(saddr1, regs + S3C2410_LCDSADDR1);
81 writel(saddr2, regs + S3C2410_LCDSADDR2);
82 writel(saddr3, regs + S3C2410_LCDSADDR3);
Arnaud Patard20fd5762005-09-09 13:10:07 -070083}
84
85/* s3c2410fb_calc_pixclk()
86 *
87 * calculate divisor for clk->pixclk
Krzysztof Heltb0831942007-10-16 01:28:54 -070088 */
Arnaud Patard20fd5762005-09-09 13:10:07 -070089static unsigned int s3c2410fb_calc_pixclk(struct s3c2410fb_info *fbi,
90 unsigned long pixclk)
91{
92 unsigned long clk = clk_get_rate(fbi->clk);
93 unsigned long long div;
94
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -070095 /* pixclk is in picoseconds, our clock is in Hz
Arnaud Patard20fd5762005-09-09 13:10:07 -070096 *
97 * Hz -> picoseconds is / 10^-12
98 */
99
100 div = (unsigned long long)clk * pixclk;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700101 div >>= 12; /* div / 2^12 */
102 do_div(div, 625 * 625UL * 625); /* div / 5^12 */
Arnaud Patard20fd5762005-09-09 13:10:07 -0700103
104 dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div);
105 return div;
106}
107
108/*
109 * s3c2410fb_check_var():
110 * Get the video params out of 'var'. If a value doesn't fit, round it up,
111 * if it's too big, return -EINVAL.
112 *
113 */
114static int s3c2410fb_check_var(struct fb_var_screeninfo *var,
115 struct fb_info *info)
116{
117 struct s3c2410fb_info *fbi = info->par;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700118 struct s3c2410fb_mach_info *mach_info = fbi->dev->platform_data;
Krzysztof Helt09fe75f2007-10-16 01:28:56 -0700119 struct s3c2410fb_display *display = NULL;
Krzysztof Helte7076382007-10-16 01:29:08 -0700120 struct s3c2410fb_display *default_display = mach_info->displays +
121 mach_info->default_display;
122 int type = default_display->type;
Krzysztof Helt09fe75f2007-10-16 01:28:56 -0700123 unsigned i;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700124
125 dprintk("check_var(var=%p, info=%p)\n", var, info);
126
127 /* validate x/y resolution */
Krzysztof Helte7076382007-10-16 01:29:08 -0700128 /* choose default mode if possible */
129 if (var->yres == default_display->yres &&
130 var->xres == default_display->xres &&
131 var->bits_per_pixel == default_display->bpp)
132 display = default_display;
133 else
134 for (i = 0; i < mach_info->num_displays; i++)
135 if (type == mach_info->displays[i].type &&
136 var->yres == mach_info->displays[i].yres &&
137 var->xres == mach_info->displays[i].xres &&
138 var->bits_per_pixel == mach_info->displays[i].bpp) {
139 display = mach_info->displays + i;
140 break;
141 }
Arnaud Patard20fd5762005-09-09 13:10:07 -0700142
Krzysztof Helt09fe75f2007-10-16 01:28:56 -0700143 if (!display) {
144 dprintk("wrong resolution or depth %dx%d at %d bpp\n",
145 var->xres, var->yres, var->bits_per_pixel);
146 return -EINVAL;
147 }
Arnaud Patard20fd5762005-09-09 13:10:07 -0700148
Krzysztof Helt9939a482007-10-16 01:28:57 -0700149 /* it is always the size as the display */
150 var->xres_virtual = display->xres;
151 var->yres_virtual = display->yres;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700152 var->height = display->height;
153 var->width = display->width;
Krzysztof Helt9939a482007-10-16 01:28:57 -0700154
155 /* copy lcd settings */
Krzysztof Helt69816692007-10-16 01:29:06 -0700156 var->pixclock = display->pixclock;
Krzysztof Helt9939a482007-10-16 01:28:57 -0700157 var->left_margin = display->left_margin;
158 var->right_margin = display->right_margin;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700159 var->upper_margin = display->upper_margin;
160 var->lower_margin = display->lower_margin;
161 var->vsync_len = display->vsync_len;
162 var->hsync_len = display->hsync_len;
163
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700164 fbi->regs.lcdcon5 = display->lcdcon5;
165 /* set display type */
Krzysztof Helt36f31a72007-10-16 01:29:07 -0700166 fbi->regs.lcdcon1 = display->type;
Krzysztof Helt9939a482007-10-16 01:28:57 -0700167
Krzysztof Heltb0831942007-10-16 01:28:54 -0700168 var->transp.offset = 0;
169 var->transp.length = 0;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700170 /* set r/g/b positions */
Arnaud Patard (Rtp357b8192006-12-08 02:40:23 -0800171 switch (var->bits_per_pixel) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700172 case 1:
173 case 2:
174 case 4:
175 var->red.offset = 0;
176 var->red.length = var->bits_per_pixel;
177 var->green = var->red;
178 var->blue = var->red;
179 break;
180 case 8:
Krzysztof Helt09fe75f2007-10-16 01:28:56 -0700181 if (display->type != S3C2410_LCDCON1_TFT) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700182 /* 8 bpp 332 */
183 var->red.length = 3;
184 var->red.offset = 5;
185 var->green.length = 3;
186 var->green.offset = 2;
187 var->blue.length = 2;
Arnaud Patard (Rtp357b8192006-12-08 02:40:23 -0800188 var->blue.offset = 0;
Krzysztof Heltb0831942007-10-16 01:28:54 -0700189 } else {
190 var->red.offset = 0;
Arnaud Patard (Rtp357b8192006-12-08 02:40:23 -0800191 var->red.length = 8;
Krzysztof Heltb0831942007-10-16 01:28:54 -0700192 var->green = var->red;
193 var->blue = var->red;
194 }
195 break;
196 case 12:
197 /* 12 bpp 444 */
198 var->red.length = 4;
199 var->red.offset = 8;
200 var->green.length = 4;
201 var->green.offset = 4;
202 var->blue.length = 4;
203 var->blue.offset = 0;
204 break;
205
206 default:
207 case 16:
Krzysztof Heltf28ef572007-10-16 01:28:58 -0700208 if (display->lcdcon5 & S3C2410_LCDCON5_FRM565) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700209 /* 16 bpp, 565 format */
210 var->red.offset = 11;
211 var->green.offset = 5;
Arnaud Patard (Rtp357b8192006-12-08 02:40:23 -0800212 var->blue.offset = 0;
Krzysztof Heltb0831942007-10-16 01:28:54 -0700213 var->red.length = 5;
214 var->green.length = 6;
215 var->blue.length = 5;
216 } else {
217 /* 16 bpp, 5551 format */
218 var->red.offset = 11;
219 var->green.offset = 6;
220 var->blue.offset = 1;
221 var->red.length = 5;
222 var->green.length = 5;
223 var->blue.length = 5;
224 }
225 break;
Krzysztof Helt93613b92007-10-16 01:29:02 -0700226 case 32:
227 /* 24 bpp 888 and 8 dummy */
Krzysztof Heltb0831942007-10-16 01:28:54 -0700228 var->red.length = 8;
229 var->red.offset = 16;
230 var->green.length = 8;
231 var->green.offset = 8;
232 var->blue.length = 8;
233 var->blue.offset = 0;
234 break;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700235 }
Arnaud Patard20fd5762005-09-09 13:10:07 -0700236 return 0;
237}
238
Krzysztof Helt9939a482007-10-16 01:28:57 -0700239/* s3c2410fb_calculate_stn_lcd_regs
Arnaud Patard20fd5762005-09-09 13:10:07 -0700240 *
Krzysztof Helt9939a482007-10-16 01:28:57 -0700241 * calculate register values from var settings
Krzysztof Heltb0831942007-10-16 01:28:54 -0700242 */
Krzysztof Helt9939a482007-10-16 01:28:57 -0700243static void s3c2410fb_calculate_stn_lcd_regs(const struct fb_info *info,
244 struct s3c2410fb_hw *regs)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700245{
Krzysztof Helt9939a482007-10-16 01:28:57 -0700246 const struct s3c2410fb_info *fbi = info->par;
247 const struct fb_var_screeninfo *var = &info->var;
248 int type = regs->lcdcon1 & ~S3C2410_LCDCON1_TFT;
249 int hs = var->xres >> 2;
250 unsigned wdly = (var->left_margin >> 4) - 1;
Krzysztof Helt93d11f52007-10-16 01:29:00 -0700251 unsigned wlh = (var->hsync_len >> 4) - 1;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700252
Krzysztof Helt9939a482007-10-16 01:28:57 -0700253 if (type != S3C2410_LCDCON1_STN4)
254 hs >>= 1;
255
Krzysztof Helt9939a482007-10-16 01:28:57 -0700256 switch (var->bits_per_pixel) {
257 case 1:
258 regs->lcdcon1 |= S3C2410_LCDCON1_STN1BPP;
259 break;
260 case 2:
261 regs->lcdcon1 |= S3C2410_LCDCON1_STN2GREY;
262 break;
263 case 4:
264 regs->lcdcon1 |= S3C2410_LCDCON1_STN4GREY;
265 break;
266 case 8:
267 regs->lcdcon1 |= S3C2410_LCDCON1_STN8BPP;
268 hs *= 3;
269 break;
270 case 12:
271 regs->lcdcon1 |= S3C2410_LCDCON1_STN12BPP;
272 hs *= 3;
273 break;
274
275 default:
276 /* invalid pixel depth */
277 dev_err(fbi->dev, "invalid bpp %d\n",
278 var->bits_per_pixel);
279 }
280 /* update X/Y info */
Krzysztof Helt9939a482007-10-16 01:28:57 -0700281 dprintk("setting horz: lft=%d, rt=%d, sync=%d\n",
282 var->left_margin, var->right_margin, var->hsync_len);
283
Krzysztof Helt3c9ffd02007-10-16 01:28:59 -0700284 regs->lcdcon2 = S3C2410_LCDCON2_LINEVAL(var->yres - 1);
Krzysztof Helt9939a482007-10-16 01:28:57 -0700285
286 if (wdly > 3)
287 wdly = 3;
288
Krzysztof Helt93d11f52007-10-16 01:29:00 -0700289 if (wlh > 3)
290 wlh = 3;
291
Krzysztof Helt9939a482007-10-16 01:28:57 -0700292 regs->lcdcon3 = S3C2410_LCDCON3_WDLY(wdly) |
293 S3C2410_LCDCON3_LINEBLANK(var->right_margin / 8) |
294 S3C2410_LCDCON3_HOZVAL(hs - 1);
Krzysztof Helt93d11f52007-10-16 01:29:00 -0700295
Krzysztof Helte92e7392007-10-16 01:29:01 -0700296 regs->lcdcon4 = S3C2410_LCDCON4_WLH(wlh);
Krzysztof Helt9939a482007-10-16 01:28:57 -0700297}
298
299/* s3c2410fb_calculate_tft_lcd_regs
300 *
301 * calculate register values from var settings
302 */
303static void s3c2410fb_calculate_tft_lcd_regs(const struct fb_info *info,
304 struct s3c2410fb_hw *regs)
305{
306 const struct s3c2410fb_info *fbi = info->par;
307 const struct fb_var_screeninfo *var = &info->var;
308
Krzysztof Helt9939a482007-10-16 01:28:57 -0700309 switch (var->bits_per_pixel) {
310 case 1:
311 regs->lcdcon1 |= S3C2410_LCDCON1_TFT1BPP;
312 break;
313 case 2:
314 regs->lcdcon1 |= S3C2410_LCDCON1_TFT2BPP;
315 break;
316 case 4:
317 regs->lcdcon1 |= S3C2410_LCDCON1_TFT4BPP;
318 break;
319 case 8:
320 regs->lcdcon1 |= S3C2410_LCDCON1_TFT8BPP;
Krzysztof Helt93613b92007-10-16 01:29:02 -0700321 regs->lcdcon5 |= S3C2410_LCDCON5_BSWP |
322 S3C2410_LCDCON5_FRM565;
323 regs->lcdcon5 &= ~S3C2410_LCDCON5_HWSWP;
Krzysztof Helt9939a482007-10-16 01:28:57 -0700324 break;
325 case 16:
326 regs->lcdcon1 |= S3C2410_LCDCON1_TFT16BPP;
Krzysztof Helt93613b92007-10-16 01:29:02 -0700327 regs->lcdcon5 &= ~S3C2410_LCDCON5_BSWP;
328 regs->lcdcon5 |= S3C2410_LCDCON5_HWSWP;
Krzysztof Helt9939a482007-10-16 01:28:57 -0700329 break;
Krzysztof Helt93613b92007-10-16 01:29:02 -0700330 case 32:
331 regs->lcdcon1 |= S3C2410_LCDCON1_TFT24BPP;
332 regs->lcdcon5 &= ~(S3C2410_LCDCON5_BSWP |
333 S3C2410_LCDCON5_HWSWP |
334 S3C2410_LCDCON5_BPP24BL);
335 break;
Krzysztof Helt9939a482007-10-16 01:28:57 -0700336 default:
337 /* invalid pixel depth */
338 dev_err(fbi->dev, "invalid bpp %d\n",
339 var->bits_per_pixel);
340 }
341 /* update X/Y info */
342 dprintk("setting vert: up=%d, low=%d, sync=%d\n",
343 var->upper_margin, var->lower_margin, var->vsync_len);
344
345 dprintk("setting horz: lft=%d, rt=%d, sync=%d\n",
346 var->left_margin, var->right_margin, var->hsync_len);
347
Krzysztof Helt93d11f52007-10-16 01:29:00 -0700348 regs->lcdcon2 = S3C2410_LCDCON2_LINEVAL(var->yres - 1) |
349 S3C2410_LCDCON2_VBPD(var->upper_margin - 1) |
350 S3C2410_LCDCON2_VFPD(var->lower_margin - 1) |
351 S3C2410_LCDCON2_VSPW(var->vsync_len - 1);
Krzysztof Helt9939a482007-10-16 01:28:57 -0700352
353 regs->lcdcon3 = S3C2410_LCDCON3_HBPD(var->right_margin - 1) |
354 S3C2410_LCDCON3_HFPD(var->left_margin - 1) |
355 S3C2410_LCDCON3_HOZVAL(var->xres - 1);
Krzysztof Helt93d11f52007-10-16 01:29:00 -0700356
Krzysztof Helte92e7392007-10-16 01:29:01 -0700357 regs->lcdcon4 = S3C2410_LCDCON4_HSPW(var->hsync_len - 1);
Krzysztof Helt9939a482007-10-16 01:28:57 -0700358}
359
360/* s3c2410fb_activate_var
361 *
362 * activate (set) the controller from the given framebuffer
363 * information
364 */
365static void s3c2410fb_activate_var(struct fb_info *info)
366{
367 struct s3c2410fb_info *fbi = info->par;
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -0700368 void __iomem *regs = fbi->io;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700369 int type = fbi->regs.lcdcon1 & S3C2410_LCDCON1_TFT;
Krzysztof Helt9939a482007-10-16 01:28:57 -0700370 struct fb_var_screeninfo *var = &info->var;
Krzysztof Helt69816692007-10-16 01:29:06 -0700371 int clkdiv = s3c2410fb_calc_pixclk(fbi, var->pixclock) / 2;
Arnaud Patard (Rtp357b8192006-12-08 02:40:23 -0800372
Harvey Harrison5ae12172008-04-28 02:15:47 -0700373 dprintk("%s: var->xres = %d\n", __func__, var->xres);
374 dprintk("%s: var->yres = %d\n", __func__, var->yres);
375 dprintk("%s: var->bpp = %d\n", __func__, var->bits_per_pixel);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700376
Krzysztof Helt69816692007-10-16 01:29:06 -0700377 if (type == S3C2410_LCDCON1_TFT) {
378 s3c2410fb_calculate_tft_lcd_regs(info, &fbi->regs);
379 --clkdiv;
380 if (clkdiv < 0)
381 clkdiv = 0;
382 } else {
383 s3c2410fb_calculate_stn_lcd_regs(info, &fbi->regs);
384 if (clkdiv < 2)
385 clkdiv = 2;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700386 }
387
Krzysztof Helt69816692007-10-16 01:29:06 -0700388 fbi->regs.lcdcon1 |= S3C2410_LCDCON1_CLKVAL(clkdiv);
Krzysztof Helt9939a482007-10-16 01:28:57 -0700389
Arnaud Patard20fd5762005-09-09 13:10:07 -0700390 /* write new registers */
391
392 dprintk("new register set:\n");
393 dprintk("lcdcon[1] = 0x%08lx\n", fbi->regs.lcdcon1);
394 dprintk("lcdcon[2] = 0x%08lx\n", fbi->regs.lcdcon2);
395 dprintk("lcdcon[3] = 0x%08lx\n", fbi->regs.lcdcon3);
396 dprintk("lcdcon[4] = 0x%08lx\n", fbi->regs.lcdcon4);
397 dprintk("lcdcon[5] = 0x%08lx\n", fbi->regs.lcdcon5);
398
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -0700399 writel(fbi->regs.lcdcon1 & ~S3C2410_LCDCON1_ENVID,
400 regs + S3C2410_LCDCON1);
401 writel(fbi->regs.lcdcon2, regs + S3C2410_LCDCON2);
402 writel(fbi->regs.lcdcon3, regs + S3C2410_LCDCON3);
403 writel(fbi->regs.lcdcon4, regs + S3C2410_LCDCON4);
404 writel(fbi->regs.lcdcon5, regs + S3C2410_LCDCON5);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700405
406 /* set lcd address pointers */
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700407 s3c2410fb_set_lcdaddr(info);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700408
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700409 fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID,
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -0700410 writel(fbi->regs.lcdcon1, regs + S3C2410_LCDCON1);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700411}
412
Arnaud Patard20fd5762005-09-09 13:10:07 -0700413/*
Krzysztof Heltb0831942007-10-16 01:28:54 -0700414 * s3c2410fb_set_par - Alters the hardware state.
Arnaud Patard20fd5762005-09-09 13:10:07 -0700415 * @info: frame buffer structure that represents a single frame buffer
416 *
417 */
418static int s3c2410fb_set_par(struct fb_info *info)
419{
Arnaud Patard20fd5762005-09-09 13:10:07 -0700420 struct fb_var_screeninfo *var = &info->var;
421
Krzysztof Heltb0831942007-10-16 01:28:54 -0700422 switch (var->bits_per_pixel) {
Krzysztof Helt93613b92007-10-16 01:29:02 -0700423 case 32:
Krzysztof Heltb0831942007-10-16 01:28:54 -0700424 case 16:
Krzysztof Helt93613b92007-10-16 01:29:02 -0700425 case 12:
Krzysztof Heltb0831942007-10-16 01:28:54 -0700426 info->fix.visual = FB_VISUAL_TRUECOLOR;
427 break;
428 case 1:
429 info->fix.visual = FB_VISUAL_MONO01;
430 break;
431 default:
432 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
433 break;
Arnaud Patard (Rtp357b8192006-12-08 02:40:23 -0800434 }
Arnaud Patard20fd5762005-09-09 13:10:07 -0700435
Stefan Schmidta1033602008-01-21 17:18:27 -0800436 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700437
438 /* activate this new configuration */
439
Krzysztof Helt9939a482007-10-16 01:28:57 -0700440 s3c2410fb_activate_var(info);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700441 return 0;
442}
443
444static void schedule_palette_update(struct s3c2410fb_info *fbi,
445 unsigned int regno, unsigned int val)
446{
447 unsigned long flags;
448 unsigned long irqen;
Ben Dooksf62e7702008-02-06 01:39:41 -0800449 void __iomem *irq_base = fbi->irq_base;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700450
451 local_irq_save(flags);
452
453 fbi->palette_buffer[regno] = val;
454
455 if (!fbi->palette_ready) {
456 fbi->palette_ready = 1;
457
458 /* enable IRQ */
Ben Dooksf62e7702008-02-06 01:39:41 -0800459 irqen = readl(irq_base + S3C24XX_LCDINTMSK);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700460 irqen &= ~S3C2410_LCDINT_FRSYNC;
Ben Dooksf62e7702008-02-06 01:39:41 -0800461 writel(irqen, irq_base + S3C24XX_LCDINTMSK);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700462 }
463
464 local_irq_restore(flags);
465}
466
467/* from pxafb.c */
Krzysztof Heltb0831942007-10-16 01:28:54 -0700468static inline unsigned int chan_to_field(unsigned int chan,
469 struct fb_bitfield *bf)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700470{
471 chan &= 0xffff;
472 chan >>= 16 - bf->length;
473 return chan << bf->offset;
474}
475
476static int s3c2410fb_setcolreg(unsigned regno,
477 unsigned red, unsigned green, unsigned blue,
478 unsigned transp, struct fb_info *info)
479{
480 struct s3c2410fb_info *fbi = info->par;
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -0700481 void __iomem *regs = fbi->io;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700482 unsigned int val;
483
Krzysztof Heltb0831942007-10-16 01:28:54 -0700484 /* dprintk("setcol: regno=%d, rgb=%d,%d,%d\n",
485 regno, red, green, blue); */
Arnaud Patard20fd5762005-09-09 13:10:07 -0700486
Krzysztof Heltb0831942007-10-16 01:28:54 -0700487 switch (info->fix.visual) {
Arnaud Patard20fd5762005-09-09 13:10:07 -0700488 case FB_VISUAL_TRUECOLOR:
Krzysztof Heltb0831942007-10-16 01:28:54 -0700489 /* true-colour, use pseudo-palette */
Arnaud Patard20fd5762005-09-09 13:10:07 -0700490
491 if (regno < 16) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700492 u32 *pal = info->pseudo_palette;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700493
Krzysztof Heltb0831942007-10-16 01:28:54 -0700494 val = chan_to_field(red, &info->var.red);
495 val |= chan_to_field(green, &info->var.green);
496 val |= chan_to_field(blue, &info->var.blue);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700497
498 pal[regno] = val;
499 }
500 break;
501
502 case FB_VISUAL_PSEUDOCOLOR:
503 if (regno < 256) {
504 /* currently assume RGB 5-6-5 mode */
505
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700506 val = (red >> 0) & 0xf800;
507 val |= (green >> 5) & 0x07e0;
508 val |= (blue >> 11) & 0x001f;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700509
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -0700510 writel(val, regs + S3C2410_TFTPAL(regno));
Arnaud Patard20fd5762005-09-09 13:10:07 -0700511 schedule_palette_update(fbi, regno, val);
512 }
513
514 break;
515
516 default:
Krzysztof Heltb0831942007-10-16 01:28:54 -0700517 return 1; /* unknown type */
Arnaud Patard20fd5762005-09-09 13:10:07 -0700518 }
519
520 return 0;
521}
522
Ben Dooks673b4602008-05-23 13:04:55 -0700523/* s3c2410fb_lcd_enable
524 *
525 * shutdown the lcd controller
526 */
527static void s3c2410fb_lcd_enable(struct s3c2410fb_info *fbi, int enable)
528{
529 unsigned long flags;
530
531 local_irq_save(flags);
532
533 if (enable)
534 fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID;
535 else
536 fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
537
538 writel(fbi->regs.lcdcon1, fbi->io + S3C2410_LCDCON1);
539
540 local_irq_restore(flags);
541}
542
543
Krzysztof Heltb0831942007-10-16 01:28:54 -0700544/*
Arnaud Patard20fd5762005-09-09 13:10:07 -0700545 * s3c2410fb_blank
546 * @blank_mode: the blank mode we want.
547 * @info: frame buffer structure that represents a single frame buffer
548 *
549 * Blank the screen if blank_mode != 0, else unblank. Return 0 if
550 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
551 * video mode which doesn't support it. Implements VESA suspend
552 * and powerdown modes on hardware that supports disabling hsync/vsync:
Arnaud Patard20fd5762005-09-09 13:10:07 -0700553 *
554 * Returns negative errno on error, or zero on success.
555 *
556 */
557static int s3c2410fb_blank(int blank_mode, struct fb_info *info)
558{
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -0700559 struct s3c2410fb_info *fbi = info->par;
Ben Dooksf62e7702008-02-06 01:39:41 -0800560 void __iomem *tpal_reg = fbi->io;
Krzysztof Helt7ee0fe42007-10-16 01:29:01 -0700561
Arnaud Patard20fd5762005-09-09 13:10:07 -0700562 dprintk("blank(mode=%d, info=%p)\n", blank_mode, info);
563
Ben Dooksf62e7702008-02-06 01:39:41 -0800564 tpal_reg += is_s3c2412(fbi) ? S3C2412_TPAL : S3C2410_TPAL;
565
Ben Dooks673b4602008-05-23 13:04:55 -0700566 if (blank_mode == FB_BLANK_POWERDOWN) {
567 s3c2410fb_lcd_enable(fbi, 0);
568 } else {
569 s3c2410fb_lcd_enable(fbi, 1);
570 }
571
Arnaud Patard20fd5762005-09-09 13:10:07 -0700572 if (blank_mode == FB_BLANK_UNBLANK)
Ben Dooksf62e7702008-02-06 01:39:41 -0800573 writel(0x0, tpal_reg);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700574 else {
575 dprintk("setting TPAL to output 0x000000\n");
Ben Dooksf62e7702008-02-06 01:39:41 -0800576 writel(S3C2410_TPAL_EN, tpal_reg);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700577 }
578
579 return 0;
580}
581
Krzysztof Heltb0831942007-10-16 01:28:54 -0700582static int s3c2410fb_debug_show(struct device *dev,
583 struct device_attribute *attr, char *buf)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700584{
585 return snprintf(buf, PAGE_SIZE, "%s\n", debug ? "on" : "off");
586}
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700587
Krzysztof Heltb0831942007-10-16 01:28:54 -0700588static int s3c2410fb_debug_store(struct device *dev,
589 struct device_attribute *attr,
590 const char *buf, size_t len)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700591{
Arnaud Patard20fd5762005-09-09 13:10:07 -0700592 if (len < 1)
593 return -EINVAL;
594
595 if (strnicmp(buf, "on", 2) == 0 ||
596 strnicmp(buf, "1", 1) == 0) {
597 debug = 1;
598 printk(KERN_DEBUG "s3c2410fb: Debug On");
599 } else if (strnicmp(buf, "off", 3) == 0 ||
600 strnicmp(buf, "0", 1) == 0) {
601 debug = 0;
602 printk(KERN_DEBUG "s3c2410fb: Debug Off");
603 } else {
604 return -EINVAL;
605 }
606
607 return len;
608}
609
Krzysztof Heltb0831942007-10-16 01:28:54 -0700610static DEVICE_ATTR(debug, 0666, s3c2410fb_debug_show, s3c2410fb_debug_store);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700611
612static struct fb_ops s3c2410fb_ops = {
613 .owner = THIS_MODULE,
614 .fb_check_var = s3c2410fb_check_var,
615 .fb_set_par = s3c2410fb_set_par,
616 .fb_blank = s3c2410fb_blank,
617 .fb_setcolreg = s3c2410fb_setcolreg,
618 .fb_fillrect = cfb_fillrect,
619 .fb_copyarea = cfb_copyarea,
620 .fb_imageblit = cfb_imageblit,
Arnaud Patard20fd5762005-09-09 13:10:07 -0700621};
622
Arnaud Patard20fd5762005-09-09 13:10:07 -0700623/*
624 * s3c2410fb_map_video_memory():
625 * Allocates the DRAM memory for the frame buffer. This buffer is
626 * remapped into a non-cached, non-buffered, memory region to
627 * allow palette and pixel writes to occur without flushing the
628 * cache. Once this area is remapped, all virtual memory
629 * access to the video memory should occur at the new region.
630 */
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700631static int __init s3c2410fb_map_video_memory(struct fb_info *info)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700632{
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700633 struct s3c2410fb_info *fbi = info->par;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700634 dma_addr_t map_dma;
635 unsigned map_size = PAGE_ALIGN(info->fix.smem_len);
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700636
Ben Dooks38a02f562008-02-06 01:39:42 -0800637 dprintk("map_video_memory(fbi=%p) map_size %u\n", fbi, map_size);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700638
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700639 info->screen_base = dma_alloc_writecombine(fbi->dev, map_size,
640 &map_dma, GFP_KERNEL);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700641
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700642 if (info->screen_base) {
Arnaud Patard20fd5762005-09-09 13:10:07 -0700643 /* prevent initial garbage on screen */
644 dprintk("map_video_memory: clear %p:%08x\n",
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700645 info->screen_base, map_size);
Ben Dooksc0d40332008-02-06 01:39:43 -0800646 memset(info->screen_base, 0x00, map_size);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700647
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700648 info->fix.smem_start = map_dma;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700649
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700650 dprintk("map_video_memory: dma=%08lx cpu=%p size=%08x\n",
651 info->fix.smem_start, info->screen_base, map_size);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700652 }
653
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700654 return info->screen_base ? 0 : -ENOMEM;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700655}
656
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700657static inline void s3c2410fb_unmap_video_memory(struct fb_info *info)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700658{
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700659 struct s3c2410fb_info *fbi = info->par;
660
661 dma_free_writecombine(fbi->dev, PAGE_ALIGN(info->fix.smem_len),
662 info->screen_base, info->fix.smem_start);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700663}
664
665static inline void modify_gpio(void __iomem *reg,
666 unsigned long set, unsigned long mask)
667{
668 unsigned long tmp;
669
670 tmp = readl(reg) & ~mask;
671 writel(tmp | set, reg);
672}
673
Arnaud Patard20fd5762005-09-09 13:10:07 -0700674/*
675 * s3c2410fb_init_registers - Initialise all LCD-related registers
676 */
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700677static int s3c2410fb_init_registers(struct fb_info *info)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700678{
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700679 struct s3c2410fb_info *fbi = info->par;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700680 struct s3c2410fb_mach_info *mach_info = fbi->dev->platform_data;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700681 unsigned long flags;
Ben Dooksaff39a82007-07-31 00:37:37 -0700682 void __iomem *regs = fbi->io;
Ben Dooksf62e7702008-02-06 01:39:41 -0800683 void __iomem *tpal;
684 void __iomem *lpcsel;
685
686 if (is_s3c2412(fbi)) {
687 tpal = regs + S3C2412_TPAL;
688 lpcsel = regs + S3C2412_TCONSEL;
689 } else {
690 tpal = regs + S3C2410_TPAL;
691 lpcsel = regs + S3C2410_LPCSEL;
692 }
Arnaud Patard20fd5762005-09-09 13:10:07 -0700693
694 /* Initialise LCD with values from haret */
695
696 local_irq_save(flags);
697
698 /* modify the gpio(s) with interrupts set (bjd) */
699
700 modify_gpio(S3C2410_GPCUP, mach_info->gpcup, mach_info->gpcup_mask);
701 modify_gpio(S3C2410_GPCCON, mach_info->gpccon, mach_info->gpccon_mask);
702 modify_gpio(S3C2410_GPDUP, mach_info->gpdup, mach_info->gpdup_mask);
703 modify_gpio(S3C2410_GPDCON, mach_info->gpdcon, mach_info->gpdcon_mask);
704
705 local_irq_restore(flags);
706
Arnaud Patard20fd5762005-09-09 13:10:07 -0700707 dprintk("LPCSEL = 0x%08lx\n", mach_info->lpcsel);
Ben Dooksf62e7702008-02-06 01:39:41 -0800708 writel(mach_info->lpcsel, lpcsel);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700709
Ben Dooksf62e7702008-02-06 01:39:41 -0800710 dprintk("replacing TPAL %08x\n", readl(tpal));
Arnaud Patard20fd5762005-09-09 13:10:07 -0700711
712 /* ensure temporary palette disabled */
Ben Dooksf62e7702008-02-06 01:39:41 -0800713 writel(0x00, tpal);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700714
Arnaud Patard20fd5762005-09-09 13:10:07 -0700715 return 0;
716}
717
718static void s3c2410fb_write_palette(struct s3c2410fb_info *fbi)
719{
720 unsigned int i;
Ben Dooksaff39a82007-07-31 00:37:37 -0700721 void __iomem *regs = fbi->io;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700722
723 fbi->palette_ready = 0;
724
725 for (i = 0; i < 256; i++) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700726 unsigned long ent = fbi->palette_buffer[i];
727 if (ent == PALETTE_BUFF_CLEAR)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700728 continue;
729
Ben Dooksaff39a82007-07-31 00:37:37 -0700730 writel(ent, regs + S3C2410_TFTPAL(i));
Arnaud Patard20fd5762005-09-09 13:10:07 -0700731
732 /* it seems the only way to know exactly
733 * if the palette wrote ok, is to check
734 * to see if the value verifies ok
735 */
736
Ben Dooksaff39a82007-07-31 00:37:37 -0700737 if (readw(regs + S3C2410_TFTPAL(i)) == ent)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700738 fbi->palette_buffer[i] = PALETTE_BUFF_CLEAR;
739 else
740 fbi->palette_ready = 1; /* retry */
741 }
742}
743
David Howells7d12e782006-10-05 14:55:46 +0100744static irqreturn_t s3c2410fb_irq(int irq, void *dev_id)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700745{
746 struct s3c2410fb_info *fbi = dev_id;
Ben Dooksf62e7702008-02-06 01:39:41 -0800747 void __iomem *irq_base = fbi->irq_base;
748 unsigned long lcdirq = readl(irq_base + S3C24XX_LCDINTPND);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700749
750 if (lcdirq & S3C2410_LCDINT_FRSYNC) {
751 if (fbi->palette_ready)
752 s3c2410fb_write_palette(fbi);
753
Ben Dooksf62e7702008-02-06 01:39:41 -0800754 writel(S3C2410_LCDINT_FRSYNC, irq_base + S3C24XX_LCDINTPND);
755 writel(S3C2410_LCDINT_FRSYNC, irq_base + S3C24XX_LCDSRCPND);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700756 }
757
758 return IRQ_HANDLED;
759}
760
Krzysztof Heltb0831942007-10-16 01:28:54 -0700761static char driver_name[] = "s3c2410fb";
Arnaud Patard20fd5762005-09-09 13:10:07 -0700762
Ben Dooksf62e7702008-02-06 01:39:41 -0800763static int __init s3c24xxfb_probe(struct platform_device *pdev,
764 enum s3c_drv_type drv_type)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700765{
766 struct s3c2410fb_info *info;
Krzysztof Helt09fe75f2007-10-16 01:28:56 -0700767 struct s3c2410fb_display *display;
Krzysztof Heltb0831942007-10-16 01:28:54 -0700768 struct fb_info *fbinfo;
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700769 struct s3c2410fb_mach_info *mach_info;
Ben Dooksaff39a82007-07-31 00:37:37 -0700770 struct resource *res;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700771 int ret;
772 int irq;
773 int i;
Ben Dooksaff39a82007-07-31 00:37:37 -0700774 int size;
Arnaud Patard6931a762006-06-26 00:26:45 -0700775 u32 lcdcon1;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700776
Russell King3ae5eae2005-11-09 22:32:44 +0000777 mach_info = pdev->dev.platform_data;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700778 if (mach_info == NULL) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700779 dev_err(&pdev->dev,
780 "no platform data for lcd, cannot attach\n");
Arnaud Patard20fd5762005-09-09 13:10:07 -0700781 return -EINVAL;
782 }
783
Ben Dookse8973632008-02-06 01:39:44 -0800784 if (mach_info->default_display >= mach_info->num_displays) {
785 dev_err(&pdev->dev, "default is %d but only %d displays\n",
786 mach_info->default_display, mach_info->num_displays);
787 return -EINVAL;
788 }
789
Krzysztof Helt09fe75f2007-10-16 01:28:56 -0700790 display = mach_info->displays + mach_info->default_display;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700791
792 irq = platform_get_irq(pdev, 0);
793 if (irq < 0) {
Russell King3ae5eae2005-11-09 22:32:44 +0000794 dev_err(&pdev->dev, "no irq for device\n");
Arnaud Patard20fd5762005-09-09 13:10:07 -0700795 return -ENOENT;
796 }
797
Russell King3ae5eae2005-11-09 22:32:44 +0000798 fbinfo = framebuffer_alloc(sizeof(struct s3c2410fb_info), &pdev->dev);
Krzysztof Heltb0831942007-10-16 01:28:54 -0700799 if (!fbinfo)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700800 return -ENOMEM;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700801
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700802 platform_set_drvdata(pdev, fbinfo);
803
Arnaud Patard20fd5762005-09-09 13:10:07 -0700804 info = fbinfo->par;
Ben Dooks0187f222007-02-16 01:28:42 -0800805 info->dev = &pdev->dev;
Ben Dooksf62e7702008-02-06 01:39:41 -0800806 info->drv_type = drv_type;
Ben Dooks0187f222007-02-16 01:28:42 -0800807
Ben Dooksaff39a82007-07-31 00:37:37 -0700808 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
809 if (res == NULL) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700810 dev_err(&pdev->dev, "failed to get memory registers\n");
Ben Dooksaff39a82007-07-31 00:37:37 -0700811 ret = -ENXIO;
812 goto dealloc_fb;
813 }
814
Krzysztof Heltb0831942007-10-16 01:28:54 -0700815 size = (res->end - res->start) + 1;
Ben Dooksaff39a82007-07-31 00:37:37 -0700816 info->mem = request_mem_region(res->start, size, pdev->name);
817 if (info->mem == NULL) {
818 dev_err(&pdev->dev, "failed to get memory region\n");
819 ret = -ENOENT;
820 goto dealloc_fb;
821 }
822
823 info->io = ioremap(res->start, size);
824 if (info->io == NULL) {
825 dev_err(&pdev->dev, "ioremap() of registers failed\n");
826 ret = -ENXIO;
827 goto release_mem;
828 }
829
Ben Dooksf62e7702008-02-06 01:39:41 -0800830 info->irq_base = info->io + ((drv_type == DRV_S3C2412) ? S3C2412_LCDINTBASE : S3C2410_LCDINTBASE);
831
Arnaud Patard20fd5762005-09-09 13:10:07 -0700832 dprintk("devinit\n");
833
834 strcpy(fbinfo->fix.id, driver_name);
835
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700836 /* Stop the video */
Ben Dooksaff39a82007-07-31 00:37:37 -0700837 lcdcon1 = readl(info->io + S3C2410_LCDCON1);
838 writel(lcdcon1 & ~S3C2410_LCDCON1_ENVID, info->io + S3C2410_LCDCON1);
Arnaud Patard6931a762006-06-26 00:26:45 -0700839
Arnaud Patard20fd5762005-09-09 13:10:07 -0700840 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
841 fbinfo->fix.type_aux = 0;
842 fbinfo->fix.xpanstep = 0;
843 fbinfo->fix.ypanstep = 0;
844 fbinfo->fix.ywrapstep = 0;
845 fbinfo->fix.accel = FB_ACCEL_NONE;
846
847 fbinfo->var.nonstd = 0;
848 fbinfo->var.activate = FB_ACTIVATE_NOW;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700849 fbinfo->var.accel_flags = 0;
850 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
851
852 fbinfo->fbops = &s3c2410fb_ops;
853 fbinfo->flags = FBINFO_FLAG_DEFAULT;
854 fbinfo->pseudo_palette = &info->pseudo_pal;
855
Arnaud Patard20fd5762005-09-09 13:10:07 -0700856 for (i = 0; i < 256; i++)
857 info->palette_buffer[i] = PALETTE_BUFF_CLEAR;
858
Thomas Gleixner63a43392006-07-01 19:29:45 -0700859 ret = request_irq(irq, s3c2410fb_irq, IRQF_DISABLED, pdev->name, info);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700860 if (ret) {
Russell King3ae5eae2005-11-09 22:32:44 +0000861 dev_err(&pdev->dev, "cannot get irq %d - err %d\n", irq, ret);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700862 ret = -EBUSY;
Ben Dooksaff39a82007-07-31 00:37:37 -0700863 goto release_regs;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700864 }
865
866 info->clk = clk_get(NULL, "lcd");
867 if (!info->clk || IS_ERR(info->clk)) {
868 printk(KERN_ERR "failed to get lcd clock source\n");
869 ret = -ENOENT;
870 goto release_irq;
871 }
872
Arnaud Patard20fd5762005-09-09 13:10:07 -0700873 clk_enable(info->clk);
874 dprintk("got and enabled clock\n");
875
876 msleep(1);
877
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700878 /* find maximum required memory size for display */
879 for (i = 0; i < mach_info->num_displays; i++) {
880 unsigned long smem_len = mach_info->displays[i].xres;
881
882 smem_len *= mach_info->displays[i].yres;
883 smem_len *= mach_info->displays[i].bpp;
884 smem_len >>= 3;
885 if (fbinfo->fix.smem_len < smem_len)
886 fbinfo->fix.smem_len = smem_len;
887 }
888
Arnaud Patard20fd5762005-09-09 13:10:07 -0700889 /* Initialize video memory */
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700890 ret = s3c2410fb_map_video_memory(fbinfo);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700891 if (ret) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700892 printk(KERN_ERR "Failed to allocate video RAM: %d\n", ret);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700893 ret = -ENOMEM;
894 goto release_clock;
895 }
Ben Dooksaff39a82007-07-31 00:37:37 -0700896
Arnaud Patard20fd5762005-09-09 13:10:07 -0700897 dprintk("got video memory\n");
898
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700899 fbinfo->var.xres = display->xres;
900 fbinfo->var.yres = display->yres;
901 fbinfo->var.bits_per_pixel = display->bpp;
902
Krzysztof Helt110c1fa2007-10-16 01:28:55 -0700903 s3c2410fb_init_registers(fbinfo);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700904
Krzysztof Heltb0831942007-10-16 01:28:54 -0700905 s3c2410fb_check_var(&fbinfo->var, fbinfo);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700906
907 ret = register_framebuffer(fbinfo);
908 if (ret < 0) {
Krzysztof Heltb0831942007-10-16 01:28:54 -0700909 printk(KERN_ERR "Failed to register framebuffer device: %d\n",
910 ret);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700911 goto free_video_memory;
912 }
913
914 /* create device files */
Ben Dooksd585dfe2008-05-23 13:04:56 -0700915 ret = device_create_file(&pdev->dev, &dev_attr_debug);
916 if (ret) {
917 printk(KERN_ERR "failed to add debug attribute\n");
918 }
Arnaud Patard20fd5762005-09-09 13:10:07 -0700919
920 printk(KERN_INFO "fb%d: %s frame buffer device\n",
921 fbinfo->node, fbinfo->fix.id);
922
923 return 0;
924
925free_video_memory:
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700926 s3c2410fb_unmap_video_memory(fbinfo);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700927release_clock:
928 clk_disable(info->clk);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700929 clk_put(info->clk);
930release_irq:
Krzysztof Heltb0831942007-10-16 01:28:54 -0700931 free_irq(irq, info);
Ben Dooksaff39a82007-07-31 00:37:37 -0700932release_regs:
933 iounmap(info->io);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700934release_mem:
Ben Dooksaff39a82007-07-31 00:37:37 -0700935 release_resource(info->mem);
936 kfree(info->mem);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700937dealloc_fb:
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700938 platform_set_drvdata(pdev, NULL);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700939 framebuffer_release(fbinfo);
940 return ret;
941}
942
Ben Dooksf62e7702008-02-06 01:39:41 -0800943static int __init s3c2410fb_probe(struct platform_device *pdev)
944{
945 return s3c24xxfb_probe(pdev, DRV_S3C2410);
946}
947
948static int __init s3c2412fb_probe(struct platform_device *pdev)
949{
950 return s3c24xxfb_probe(pdev, DRV_S3C2412);
951}
952
Arnaud Patard20fd5762005-09-09 13:10:07 -0700953
954/*
955 * Cleanup
956 */
Russell King3ae5eae2005-11-09 22:32:44 +0000957static int s3c2410fb_remove(struct platform_device *pdev)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700958{
Krzysztof Heltb0831942007-10-16 01:28:54 -0700959 struct fb_info *fbinfo = platform_get_drvdata(pdev);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700960 struct s3c2410fb_info *info = fbinfo->par;
961 int irq;
962
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700963 unregister_framebuffer(fbinfo);
964
Ben Dooks673b4602008-05-23 13:04:55 -0700965 s3c2410fb_lcd_enable(info, 0);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700966 msleep(1);
967
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700968 s3c2410fb_unmap_video_memory(fbinfo);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700969
Krzysztof Heltb0831942007-10-16 01:28:54 -0700970 if (info->clk) {
971 clk_disable(info->clk);
972 clk_put(info->clk);
973 info->clk = NULL;
Arnaud Patard20fd5762005-09-09 13:10:07 -0700974 }
975
976 irq = platform_get_irq(pdev, 0);
Krzysztof Heltb0831942007-10-16 01:28:54 -0700977 free_irq(irq, info);
Ben Dooksaff39a82007-07-31 00:37:37 -0700978
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700979 iounmap(info->io);
980
Ben Dooksaff39a82007-07-31 00:37:37 -0700981 release_resource(info->mem);
982 kfree(info->mem);
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -0700983
984 platform_set_drvdata(pdev, NULL);
985 framebuffer_release(fbinfo);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700986
987 return 0;
988}
989
990#ifdef CONFIG_PM
991
992/* suspend and resume support for the lcd controller */
Russell King3ae5eae2005-11-09 22:32:44 +0000993static int s3c2410fb_suspend(struct platform_device *dev, pm_message_t state)
Arnaud Patard20fd5762005-09-09 13:10:07 -0700994{
Russell King3ae5eae2005-11-09 22:32:44 +0000995 struct fb_info *fbinfo = platform_get_drvdata(dev);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700996 struct s3c2410fb_info *info = fbinfo->par;
997
Ben Dooks673b4602008-05-23 13:04:55 -0700998 s3c2410fb_lcd_enable(info, 0);
Arnaud Patard20fd5762005-09-09 13:10:07 -0700999
Russell King9480e302005-10-28 09:52:56 -07001000 /* sleep before disabling the clock, we need to ensure
1001 * the LCD DMA engine is not going to get back on the bus
1002 * before the clock goes off again (bjd) */
Arnaud Patard20fd5762005-09-09 13:10:07 -07001003
Russell King9480e302005-10-28 09:52:56 -07001004 msleep(1);
1005 clk_disable(info->clk);
Arnaud Patard20fd5762005-09-09 13:10:07 -07001006
1007 return 0;
1008}
1009
Russell King3ae5eae2005-11-09 22:32:44 +00001010static int s3c2410fb_resume(struct platform_device *dev)
Arnaud Patard20fd5762005-09-09 13:10:07 -07001011{
Russell King3ae5eae2005-11-09 22:32:44 +00001012 struct fb_info *fbinfo = platform_get_drvdata(dev);
Arnaud Patard20fd5762005-09-09 13:10:07 -07001013 struct s3c2410fb_info *info = fbinfo->par;
1014
Russell King9480e302005-10-28 09:52:56 -07001015 clk_enable(info->clk);
1016 msleep(1);
Arnaud Patard20fd5762005-09-09 13:10:07 -07001017
Krzysztof Heltf0466442008-01-14 00:55:20 -08001018 s3c2410fb_init_registers(fbinfo);
Arnaud Patard20fd5762005-09-09 13:10:07 -07001019
Daniel Silverstone60f793d2009-02-10 13:40:38 +01001020 /* re-activate our display after resume */
1021 s3c2410fb_activate_var(fbinfo);
1022 s3c2410fb_blank(FB_BLANK_UNBLANK, fbinfo);
1023
Arnaud Patard20fd5762005-09-09 13:10:07 -07001024 return 0;
1025}
1026
1027#else
1028#define s3c2410fb_suspend NULL
1029#define s3c2410fb_resume NULL
1030#endif
1031
Russell King3ae5eae2005-11-09 22:32:44 +00001032static struct platform_driver s3c2410fb_driver = {
Arnaud Patard20fd5762005-09-09 13:10:07 -07001033 .probe = s3c2410fb_probe,
Russell King3ae5eae2005-11-09 22:32:44 +00001034 .remove = s3c2410fb_remove,
Arnaud Patard20fd5762005-09-09 13:10:07 -07001035 .suspend = s3c2410fb_suspend,
1036 .resume = s3c2410fb_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00001037 .driver = {
1038 .name = "s3c2410-lcd",
1039 .owner = THIS_MODULE,
1040 },
Arnaud Patard20fd5762005-09-09 13:10:07 -07001041};
1042
Ben Dooksf62e7702008-02-06 01:39:41 -08001043static struct platform_driver s3c2412fb_driver = {
1044 .probe = s3c2412fb_probe,
1045 .remove = s3c2410fb_remove,
1046 .suspend = s3c2410fb_suspend,
1047 .resume = s3c2410fb_resume,
1048 .driver = {
1049 .name = "s3c2412-lcd",
1050 .owner = THIS_MODULE,
1051 },
1052};
1053
Krzysztof Helt9fa7bc02007-10-16 01:29:05 -07001054int __init s3c2410fb_init(void)
Arnaud Patard20fd5762005-09-09 13:10:07 -07001055{
Ben Dooksf62e7702008-02-06 01:39:41 -08001056 int ret = platform_driver_register(&s3c2410fb_driver);
1057
1058 if (ret == 0)
1059 ret = platform_driver_register(&s3c2412fb_driver);;
1060
1061 return ret;
Arnaud Patard20fd5762005-09-09 13:10:07 -07001062}
1063
1064static void __exit s3c2410fb_cleanup(void)
1065{
Russell King3ae5eae2005-11-09 22:32:44 +00001066 platform_driver_unregister(&s3c2410fb_driver);
Ben Dooksf62e7702008-02-06 01:39:41 -08001067 platform_driver_unregister(&s3c2412fb_driver);
Arnaud Patard20fd5762005-09-09 13:10:07 -07001068}
1069
Arnaud Patard20fd5762005-09-09 13:10:07 -07001070module_init(s3c2410fb_init);
1071module_exit(s3c2410fb_cleanup);
1072
Krzysztof Heltb0831942007-10-16 01:28:54 -07001073MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>, "
1074 "Ben Dooks <ben-linux@fluff.org>");
Arnaud Patard20fd5762005-09-09 13:10:07 -07001075MODULE_DESCRIPTION("Framebuffer driver for the s3c2410");
1076MODULE_LICENSE("GPL");
Ben Dooksee294202008-05-23 13:04:57 -07001077MODULE_ALIAS("platform:s3c2410-lcd");
1078MODULE_ALIAS("platform:s3c2412-lcd");