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authorLars-Peter Clausen <lars@metafoo.de>2010-07-17 07:14:34 -0400
committerRalf Baechle <ralf@linux-mips.org>2010-08-05 08:26:17 -0400
commit7a92d54521443450b14d89c413ec2072365da5bc (patch)
tree9fbebc9638b25639d2f0129a2df4dda38bdb0fc8
parent3bf0eea8942fdcb948dea7e45c38bf7563407c49 (diff)
FBDEV: JZ4740: Add framebuffer driver
Add support for the LCD controller on JZ4740 SoCs. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-fbdev@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1470/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat
-rw-r--r--arch/mips/include/asm/mach-jz4740/jz4740_fb.h67
-rw-r--r--drivers/video/Kconfig9
-rw-r--r--drivers/video/Makefile1
-rw-r--r--drivers/video/jz4740_fb.c847
4 files changed, 924 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-jz4740/jz4740_fb.h b/arch/mips/include/asm/mach-jz4740/jz4740_fb.h
new file mode 100644
index 000000000000..6a50e6f7a21a
--- /dev/null
+++ b/arch/mips/include/asm/mach-jz4740/jz4740_fb.h
@@ -0,0 +1,67 @@
1/*
2 * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * You should have received a copy of the GNU General Public License along
10 * with this program; if not, write to the Free Software Foundation, Inc.,
11 * 675 Mass Ave, Cambridge, MA 02139, USA.
12 *
13 */
14
15#ifndef __ASM_MACH_JZ4740_JZ4740_FB_H__
16#define __ASM_MACH_JZ4740_JZ4740_FB_H__
17
18#include <linux/fb.h>
19
20enum jz4740_fb_lcd_type {
21 JZ_LCD_TYPE_GENERIC_16_BIT = 0,
22 JZ_LCD_TYPE_GENERIC_18_BIT = 0 | (1 << 4),
23 JZ_LCD_TYPE_SPECIAL_TFT_1 = 1,
24 JZ_LCD_TYPE_SPECIAL_TFT_2 = 2,
25 JZ_LCD_TYPE_SPECIAL_TFT_3 = 3,
26 JZ_LCD_TYPE_NON_INTERLACED_CCIR656 = 5,
27 JZ_LCD_TYPE_INTERLACED_CCIR656 = 7,
28 JZ_LCD_TYPE_SINGLE_COLOR_STN = 8,
29 JZ_LCD_TYPE_SINGLE_MONOCHROME_STN = 9,
30 JZ_LCD_TYPE_DUAL_COLOR_STN = 10,
31 JZ_LCD_TYPE_DUAL_MONOCHROME_STN = 11,
32 JZ_LCD_TYPE_8BIT_SERIAL = 12,
33};
34
35#define JZ4740_FB_SPECIAL_TFT_CONFIG(start, stop) (((start) << 16) | (stop))
36
37/*
38* width: width of the lcd display in mm
39* height: height of the lcd display in mm
40* num_modes: size of modes
41* modes: list of valid video modes
42* bpp: bits per pixel for the lcd
43* lcd_type: lcd type
44*/
45
46struct jz4740_fb_platform_data {
47 unsigned int width;
48 unsigned int height;
49
50 size_t num_modes;
51 struct fb_videomode *modes;
52
53 unsigned int bpp;
54 enum jz4740_fb_lcd_type lcd_type;
55
56 struct {
57 uint32_t spl;
58 uint32_t cls;
59 uint32_t ps;
60 uint32_t rev;
61 } special_tft_config;
62
63 unsigned pixclk_falling_edge:1;
64 unsigned date_enable_active_low:1;
65};
66
67#endif
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 3d94a1471724..9e711a1d0d97 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -2229,6 +2229,15 @@ config FB_BROADSHEET
2229 and could also have been called by other names when coupled with 2229 and could also have been called by other names when coupled with
2230 a bridge adapter. 2230 a bridge adapter.
2231 2231
2232config FB_JZ4740
2233 tristate "JZ4740 LCD framebuffer support"
2234 depends on FB && MACH_JZ4740
2235 select FB_SYS_FILLRECT
2236 select FB_SYS_COPYAREA
2237 select FB_SYS_IMAGEBLIT
2238 help
2239 Framebuffer support for the JZ4740 SoC.
2240
2232source "drivers/video/omap/Kconfig" 2241source "drivers/video/omap/Kconfig"
2233source "drivers/video/omap2/Kconfig" 2242source "drivers/video/omap2/Kconfig"
2234 2243
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index ddc2af2ba45b..f56a9cae2157 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -131,6 +131,7 @@ obj-$(CONFIG_FB_CARMINE) += carminefb.o
131obj-$(CONFIG_FB_MB862XX) += mb862xx/ 131obj-$(CONFIG_FB_MB862XX) += mb862xx/
132obj-$(CONFIG_FB_MSM) += msm/ 132obj-$(CONFIG_FB_MSM) += msm/
133obj-$(CONFIG_FB_NUC900) += nuc900fb.o 133obj-$(CONFIG_FB_NUC900) += nuc900fb.o
134obj-$(CONFIG_FB_JZ4740) += jz4740_fb.o
134 135
135# Platform or fallback drivers go here 136# Platform or fallback drivers go here
136obj-$(CONFIG_FB_UVESA) += uvesafb.o 137obj-$(CONFIG_FB_UVESA) += uvesafb.o
diff --git a/drivers/video/jz4740_fb.c b/drivers/video/jz4740_fb.c
new file mode 100644
index 000000000000..670ecaa0385a
--- /dev/null
+++ b/drivers/video/jz4740_fb.c
@@ -0,0 +1,847 @@
1/*
2 * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
3 * JZ4740 SoC LCD framebuffer driver
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * You should have received a copy of the GNU General Public License along
11 * with this program; if not, write to the Free Software Foundation, Inc.,
12 * 675 Mass Ave, Cambridge, MA 02139, USA.
13 *
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/mutex.h>
19#include <linux/platform_device.h>
20
21#include <linux/clk.h>
22#include <linux/delay.h>
23
24#include <linux/console.h>
25#include <linux/fb.h>
26
27#include <linux/dma-mapping.h>
28
29#include <asm/mach-jz4740/jz4740_fb.h>
30#include <asm/mach-jz4740/gpio.h>
31
32#define JZ_REG_LCD_CFG 0x00
33#define JZ_REG_LCD_VSYNC 0x04
34#define JZ_REG_LCD_HSYNC 0x08
35#define JZ_REG_LCD_VAT 0x0C
36#define JZ_REG_LCD_DAH 0x10
37#define JZ_REG_LCD_DAV 0x14
38#define JZ_REG_LCD_PS 0x18
39#define JZ_REG_LCD_CLS 0x1C
40#define JZ_REG_LCD_SPL 0x20
41#define JZ_REG_LCD_REV 0x24
42#define JZ_REG_LCD_CTRL 0x30
43#define JZ_REG_LCD_STATE 0x34
44#define JZ_REG_LCD_IID 0x38
45#define JZ_REG_LCD_DA0 0x40
46#define JZ_REG_LCD_SA0 0x44
47#define JZ_REG_LCD_FID0 0x48
48#define JZ_REG_LCD_CMD0 0x4C
49#define JZ_REG_LCD_DA1 0x50
50#define JZ_REG_LCD_SA1 0x54
51#define JZ_REG_LCD_FID1 0x58
52#define JZ_REG_LCD_CMD1 0x5C
53
54#define JZ_LCD_CFG_SLCD BIT(31)
55#define JZ_LCD_CFG_PS_DISABLE BIT(23)
56#define JZ_LCD_CFG_CLS_DISABLE BIT(22)
57#define JZ_LCD_CFG_SPL_DISABLE BIT(21)
58#define JZ_LCD_CFG_REV_DISABLE BIT(20)
59#define JZ_LCD_CFG_HSYNCM BIT(19)
60#define JZ_LCD_CFG_PCLKM BIT(18)
61#define JZ_LCD_CFG_INV BIT(17)
62#define JZ_LCD_CFG_SYNC_DIR BIT(16)
63#define JZ_LCD_CFG_PS_POLARITY BIT(15)
64#define JZ_LCD_CFG_CLS_POLARITY BIT(14)
65#define JZ_LCD_CFG_SPL_POLARITY BIT(13)
66#define JZ_LCD_CFG_REV_POLARITY BIT(12)
67#define JZ_LCD_CFG_HSYNC_ACTIVE_LOW BIT(11)
68#define JZ_LCD_CFG_PCLK_FALLING_EDGE BIT(10)
69#define JZ_LCD_CFG_DE_ACTIVE_LOW BIT(9)
70#define JZ_LCD_CFG_VSYNC_ACTIVE_LOW BIT(8)
71#define JZ_LCD_CFG_18_BIT BIT(7)
72#define JZ_LCD_CFG_PDW (BIT(5) | BIT(4))
73#define JZ_LCD_CFG_MODE_MASK 0xf
74
75#define JZ_LCD_CTRL_BURST_4 (0x0 << 28)
76#define JZ_LCD_CTRL_BURST_8 (0x1 << 28)
77#define JZ_LCD_CTRL_BURST_16 (0x2 << 28)
78#define JZ_LCD_CTRL_RGB555 BIT(27)
79#define JZ_LCD_CTRL_OFUP BIT(26)
80#define JZ_LCD_CTRL_FRC_GRAYSCALE_16 (0x0 << 24)
81#define JZ_LCD_CTRL_FRC_GRAYSCALE_4 (0x1 << 24)
82#define JZ_LCD_CTRL_FRC_GRAYSCALE_2 (0x2 << 24)
83#define JZ_LCD_CTRL_PDD_MASK (0xff << 16)
84#define JZ_LCD_CTRL_EOF_IRQ BIT(13)
85#define JZ_LCD_CTRL_SOF_IRQ BIT(12)
86#define JZ_LCD_CTRL_OFU_IRQ BIT(11)
87#define JZ_LCD_CTRL_IFU0_IRQ BIT(10)
88#define JZ_LCD_CTRL_IFU1_IRQ BIT(9)
89#define JZ_LCD_CTRL_DD_IRQ BIT(8)
90#define JZ_LCD_CTRL_QDD_IRQ BIT(7)
91#define JZ_LCD_CTRL_REVERSE_ENDIAN BIT(6)
92#define JZ_LCD_CTRL_LSB_FISRT BIT(5)
93#define JZ_LCD_CTRL_DISABLE BIT(4)
94#define JZ_LCD_CTRL_ENABLE BIT(3)
95#define JZ_LCD_CTRL_BPP_1 0x0
96#define JZ_LCD_CTRL_BPP_2 0x1
97#define JZ_LCD_CTRL_BPP_4 0x2
98#define JZ_LCD_CTRL_BPP_8 0x3
99#define JZ_LCD_CTRL_BPP_15_16 0x4
100#define JZ_LCD_CTRL_BPP_18_24 0x5
101
102#define JZ_LCD_CMD_SOF_IRQ BIT(15)
103#define JZ_LCD_CMD_EOF_IRQ BIT(16)
104#define JZ_LCD_CMD_ENABLE_PAL BIT(12)
105
106#define JZ_LCD_SYNC_MASK 0x3ff
107
108#define JZ_LCD_STATE_DISABLED BIT(0)
109
110struct jzfb_framedesc {
111 uint32_t next;
112 uint32_t addr;
113 uint32_t id;
114 uint32_t cmd;
115} __packed;
116
117struct jzfb {
118 struct fb_info *fb;
119 struct platform_device *pdev;
120 void __iomem *base;
121 struct resource *mem;
122 struct jz4740_fb_platform_data *pdata;
123
124 size_t vidmem_size;
125 void *vidmem;
126 dma_addr_t vidmem_phys;
127 struct jzfb_framedesc *framedesc;
128 dma_addr_t framedesc_phys;
129
130 struct clk *ldclk;
131 struct clk *lpclk;
132
133 unsigned is_enabled:1;
134 struct mutex lock;
135
136 uint32_t pseudo_palette[16];
137};
138
139static const struct fb_fix_screeninfo jzfb_fix __devinitdata = {
140 .id = "JZ4740 FB",
141 .type = FB_TYPE_PACKED_PIXELS,
142 .visual = FB_VISUAL_TRUECOLOR,
143 .xpanstep = 0,
144 .ypanstep = 0,
145 .ywrapstep = 0,
146 .accel = FB_ACCEL_NONE,
147};
148
149static const struct jz_gpio_bulk_request jz_lcd_ctrl_pins[] = {
150 JZ_GPIO_BULK_PIN(LCD_PCLK),
151 JZ_GPIO_BULK_PIN(LCD_HSYNC),
152 JZ_GPIO_BULK_PIN(LCD_VSYNC),
153 JZ_GPIO_BULK_PIN(LCD_DE),
154 JZ_GPIO_BULK_PIN(LCD_PS),
155 JZ_GPIO_BULK_PIN(LCD_REV),
156 JZ_GPIO_BULK_PIN(LCD_CLS),
157 JZ_GPIO_BULK_PIN(LCD_SPL),
158};
159
160static const struct jz_gpio_bulk_request jz_lcd_data_pins[] = {
161 JZ_GPIO_BULK_PIN(LCD_DATA0),
162 JZ_GPIO_BULK_PIN(LCD_DATA1),
163 JZ_GPIO_BULK_PIN(LCD_DATA2),
164 JZ_GPIO_BULK_PIN(LCD_DATA3),
165 JZ_GPIO_BULK_PIN(LCD_DATA4),
166 JZ_GPIO_BULK_PIN(LCD_DATA5),
167 JZ_GPIO_BULK_PIN(LCD_DATA6),
168 JZ_GPIO_BULK_PIN(LCD_DATA7),
169 JZ_GPIO_BULK_PIN(LCD_DATA8),
170 JZ_GPIO_BULK_PIN(LCD_DATA9),
171 JZ_GPIO_BULK_PIN(LCD_DATA10),
172 JZ_GPIO_BULK_PIN(LCD_DATA11),
173 JZ_GPIO_BULK_PIN(LCD_DATA12),
174 JZ_GPIO_BULK_PIN(LCD_DATA13),
175 JZ_GPIO_BULK_PIN(LCD_DATA14),
176 JZ_GPIO_BULK_PIN(LCD_DATA15),
177 JZ_GPIO_BULK_PIN(LCD_DATA16),
178 JZ_GPIO_BULK_PIN(LCD_DATA17),
179};
180
181static unsigned int jzfb_num_ctrl_pins(struct jzfb *jzfb)
182{
183 unsigned int num;
184
185 switch (jzfb->pdata->lcd_type) {
186 case JZ_LCD_TYPE_GENERIC_16_BIT:
187 num = 4;
188 break;
189 case JZ_LCD_TYPE_GENERIC_18_BIT:
190 num = 4;
191 break;
192 case JZ_LCD_TYPE_8BIT_SERIAL:
193 num = 3;
194 break;
195 case JZ_LCD_TYPE_SPECIAL_TFT_1:
196 case JZ_LCD_TYPE_SPECIAL_TFT_2:
197 case JZ_LCD_TYPE_SPECIAL_TFT_3:
198 num = 8;
199 break;
200 default:
201 num = 0;
202 break;
203 }
204 return num;
205}
206
207static unsigned int jzfb_num_data_pins(struct jzfb *jzfb)
208{
209 unsigned int num;
210
211 switch (jzfb->pdata->lcd_type) {
212 case JZ_LCD_TYPE_GENERIC_16_BIT:
213 num = 16;
214 break;
215 case JZ_LCD_TYPE_GENERIC_18_BIT:
216 num = 18;
217 break;
218 case JZ_LCD_TYPE_8BIT_SERIAL:
219 num = 8;
220 break;
221 case JZ_LCD_TYPE_SPECIAL_TFT_1:
222 case JZ_LCD_TYPE_SPECIAL_TFT_2:
223 case JZ_LCD_TYPE_SPECIAL_TFT_3:
224 if (jzfb->pdata->bpp == 18)
225 num = 18;
226 else
227 num = 16;
228 break;
229 default:
230 num = 0;
231 break;
232 }
233 return num;
234}
235
236/* Based on CNVT_TOHW macro from skeletonfb.c */
237static inline uint32_t jzfb_convert_color_to_hw(unsigned val,
238 struct fb_bitfield *bf)
239{
240 return (((val << bf->length) + 0x7FFF - val) >> 16) << bf->offset;
241}
242
243static int jzfb_setcolreg(unsigned regno, unsigned red, unsigned green,
244 unsigned blue, unsigned transp, struct fb_info *fb)
245{
246 uint32_t color;
247
248 if (regno >= 16)
249 return -EINVAL;
250
251 color = jzfb_convert_color_to_hw(red, &fb->var.red);
252 color |= jzfb_convert_color_to_hw(green, &fb->var.green);
253 color |= jzfb_convert_color_to_hw(blue, &fb->var.blue);
254 color |= jzfb_convert_color_to_hw(transp, &fb->var.transp);
255
256 ((uint32_t *)(fb->pseudo_palette))[regno] = color;
257
258 return 0;
259}
260
261static int jzfb_get_controller_bpp(struct jzfb *jzfb)
262{
263 switch (jzfb->pdata->bpp) {
264 case 18:
265 case 24:
266 return 32;
267 case 15:
268 return 16;
269 default:
270 return jzfb->pdata->bpp;
271 }
272}
273
274static struct fb_videomode *jzfb_get_mode(struct jzfb *jzfb,
275 struct fb_var_screeninfo *var)
276{
277 size_t i;
278 struct fb_videomode *mode = jzfb->pdata->modes;
279
280 for (i = 0; i < jzfb->pdata->num_modes; ++i, ++mode) {
281 if (mode->xres == var->xres && mode->yres == var->yres)
282 return mode;
283 }
284
285 return NULL;
286}
287
288static int jzfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fb)
289{
290 struct jzfb *jzfb = fb->par;
291 struct fb_videomode *mode;
292
293 if (var->bits_per_pixel != jzfb_get_controller_bpp(jzfb) &&
294 var->bits_per_pixel != jzfb->pdata->bpp)
295 return -EINVAL;
296
297 mode = jzfb_get_mode(jzfb, var);
298 if (mode == NULL)
299 return -EINVAL;
300
301 fb_videomode_to_var(var, mode);
302
303 switch (jzfb->pdata->bpp) {
304 case 8:
305 break;
306 case 15:
307 var->red.offset = 10;
308 var->red.length = 5;
309 var->green.offset = 6;
310 var->green.length = 5;
311 var->blue.offset = 0;
312 var->blue.length = 5;
313 break;
314 case 16:
315 var->red.offset = 11;
316 var->red.length = 5;
317 var->green.offset = 5;
318 var->green.length = 6;
319 var->blue.offset = 0;
320 var->blue.length = 5;
321 break;
322 case 18:
323 var->red.offset = 16;
324 var->red.length = 6;
325 var->green.offset = 8;
326 var->green.length = 6;
327 var->blue.offset = 0;
328 var->blue.length = 6;
329 var->bits_per_pixel = 32;
330 break;
331 case 32:
332 case 24:
333 var->transp.offset = 24;
334 var->transp.length = 8;
335 var->red.offset = 16;
336 var->red.length = 8;
337 var->green.offset = 8;
338 var->green.length = 8;
339 var->blue.offset = 0;
340 var->blue.length = 8;
341 var->bits_per_pixel = 32;
342 break;
343 default:
344 break;
345 }
346
347 return 0;
348}
349
350static int jzfb_set_par(struct fb_info *info)
351{
352 struct jzfb *jzfb = info->par;
353 struct jz4740_fb_platform_data *pdata = jzfb->pdata;
354 struct fb_var_screeninfo *var = &info->var;
355 struct fb_videomode *mode;
356 uint16_t hds, vds;
357 uint16_t hde, vde;
358 uint16_t ht, vt;
359 uint32_t ctrl;
360 uint32_t cfg;
361 unsigned long rate;
362
363 mode = jzfb_get_mode(jzfb, var);
364 if (mode == NULL)
365 return -EINVAL;
366
367 if (mode == info->mode)
368 return 0;
369
370 info->mode = mode;
371
372 hds = mode->hsync_len + mode->left_margin;
373 hde = hds + mode->xres;
374 ht = hde + mode->right_margin;
375
376 vds = mode->vsync_len + mode->upper_margin;
377 vde = vds + mode->yres;
378 vt = vde + mode->lower_margin;
379
380 ctrl = JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_16;
381
382 switch (pdata->bpp) {
383 case 1:
384 ctrl |= JZ_LCD_CTRL_BPP_1;
385 break;
386 case 2:
387 ctrl |= JZ_LCD_CTRL_BPP_2;
388 break;
389 case 4:
390 ctrl |= JZ_LCD_CTRL_BPP_4;
391 break;
392 case 8:
393 ctrl |= JZ_LCD_CTRL_BPP_8;
394 break;
395 case 15:
396 ctrl |= JZ_LCD_CTRL_RGB555; /* Falltrough */
397 case 16:
398 ctrl |= JZ_LCD_CTRL_BPP_15_16;
399 break;
400 case 18:
401 case 24:
402 case 32:
403 ctrl |= JZ_LCD_CTRL_BPP_18_24;
404 break;
405 default:
406 break;
407 }
408
409 cfg = pdata->lcd_type & 0xf;
410
411 if (!(mode->sync & FB_SYNC_HOR_HIGH_ACT))
412 cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW;
413
414 if (!(mode->sync & FB_SYNC_VERT_HIGH_ACT))
415 cfg |= JZ_LCD_CFG_VSYNC_ACTIVE_LOW;
416
417 if (pdata->pixclk_falling_edge)
418 cfg |= JZ_LCD_CFG_PCLK_FALLING_EDGE;
419
420 if (pdata->date_enable_active_low)
421 cfg |= JZ_LCD_CFG_DE_ACTIVE_LOW;
422
423 if (pdata->lcd_type == JZ_LCD_TYPE_GENERIC_18_BIT)
424 cfg |= JZ_LCD_CFG_18_BIT;
425
426 if (mode->pixclock) {
427 rate = PICOS2KHZ(mode->pixclock) * 1000;
428 mode->refresh = rate / vt / ht;
429 } else {
430 if (pdata->lcd_type == JZ_LCD_TYPE_8BIT_SERIAL)
431 rate = mode->refresh * (vt + 2 * mode->xres) * ht;
432 else
433 rate = mode->refresh * vt * ht;
434
435 mode->pixclock = KHZ2PICOS(rate / 1000);
436 }
437
438 mutex_lock(&jzfb->lock);
439 if (!jzfb->is_enabled)
440 clk_enable(jzfb->ldclk);
441 else
442 ctrl |= JZ_LCD_CTRL_ENABLE;
443
444 switch (pdata->lcd_type) {
445 case JZ_LCD_TYPE_SPECIAL_TFT_1:
446 case JZ_LCD_TYPE_SPECIAL_TFT_2:
447 case JZ_LCD_TYPE_SPECIAL_TFT_3:
448 writel(pdata->special_tft_config.spl, jzfb->base + JZ_REG_LCD_SPL);
449 writel(pdata->special_tft_config.cls, jzfb->base + JZ_REG_LCD_CLS);
450 writel(pdata->special_tft_config.ps, jzfb->base + JZ_REG_LCD_PS);
451 writel(pdata->special_tft_config.ps, jzfb->base + JZ_REG_LCD_REV);
452 break;
453 default:
454 cfg |= JZ_LCD_CFG_PS_DISABLE;
455 cfg |= JZ_LCD_CFG_CLS_DISABLE;
456 cfg |= JZ_LCD_CFG_SPL_DISABLE;
457 cfg |= JZ_LCD_CFG_REV_DISABLE;
458 break;
459 }
460
461 writel(mode->hsync_len, jzfb->base + JZ_REG_LCD_HSYNC);
462 writel(mode->vsync_len, jzfb->base + JZ_REG_LCD_VSYNC);
463
464 writel((ht << 16) | vt, jzfb->base + JZ_REG_LCD_VAT);
465
466 writel((hds << 16) | hde, jzfb->base + JZ_REG_LCD_DAH);
467 writel((vds << 16) | vde, jzfb->base + JZ_REG_LCD_DAV);
468
469 writel(cfg, jzfb->base + JZ_REG_LCD_CFG);
470
471 writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
472
473 if (!jzfb->is_enabled)
474 clk_disable(jzfb->ldclk);
475
476 mutex_unlock(&jzfb->lock);
477
478 clk_set_rate(jzfb->lpclk, rate);
479 clk_set_rate(jzfb->ldclk, rate * 3);
480
481 return 0;
482}
483
484static void jzfb_enable(struct jzfb *jzfb)
485{
486 uint32_t ctrl;
487
488 clk_enable(jzfb->ldclk);
489
490 jz_gpio_bulk_resume(jz_lcd_ctrl_pins, jzfb_num_ctrl_pins(jzfb));
491 jz_gpio_bulk_resume(jz_lcd_data_pins, jzfb_num_data_pins(jzfb));
492
493 writel(0, jzfb->base + JZ_REG_LCD_STATE);
494
495 writel(jzfb->framedesc->next, jzfb->base + JZ_REG_LCD_DA0);
496
497 ctrl = readl(jzfb->base + JZ_REG_LCD_CTRL);
498 ctrl |= JZ_LCD_CTRL_ENABLE;
499 ctrl &= ~JZ_LCD_CTRL_DISABLE;
500 writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
501}
502
503static void jzfb_disable(struct jzfb *jzfb)
504{
505 uint32_t ctrl;
506
507 ctrl = readl(jzfb->base + JZ_REG_LCD_CTRL);
508 ctrl |= JZ_LCD_CTRL_DISABLE;
509 writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
510 do {
511 ctrl = readl(jzfb->base + JZ_REG_LCD_STATE);
512 } while (!(ctrl & JZ_LCD_STATE_DISABLED));
513
514 jz_gpio_bulk_suspend(jz_lcd_ctrl_pins, jzfb_num_ctrl_pins(jzfb));
515 jz_gpio_bulk_suspend(jz_lcd_data_pins, jzfb_num_data_pins(jzfb));
516
517 clk_disable(jzfb->ldclk);
518}
519
520static int jzfb_blank(int blank_mode, struct fb_info *info)
521{
522 struct jzfb *jzfb = info->par;
523
524 switch (blank_mode) {
525 case FB_BLANK_UNBLANK:
526 mutex_lock(&jzfb->lock);
527 if (jzfb->is_enabled) {
528 mutex_unlock(&jzfb->lock);
529 return 0;
530 }
531
532 jzfb_enable(jzfb);
533 jzfb->is_enabled = 1;
534
535 mutex_unlock(&jzfb->lock);
536 break;
537 default:
538 mutex_lock(&jzfb->lock);
539 if (!jzfb->is_enabled) {
540 mutex_unlock(&jzfb->lock);
541 return 0;
542 }
543
544 jzfb_disable(jzfb);
545 jzfb->is_enabled = 0;
546
547 mutex_unlock(&jzfb->lock);
548 break;
549 }
550
551 return 0;
552}
553
554static int jzfb_alloc_devmem(struct jzfb *jzfb)
555{
556 int max_videosize = 0;
557 struct fb_videomode *mode = jzfb->pdata->modes;
558 void *page;
559 int i;
560
561 for (i = 0; i < jzfb->pdata->num_modes; ++mode, ++i) {
562 if (max_videosize < mode->xres * mode->yres)
563 max_videosize = mode->xres * mode->yres;
564 }
565
566 max_videosize *= jzfb_get_controller_bpp(jzfb) >> 3;
567
568 jzfb->framedesc = dma_alloc_coherent(&jzfb->pdev->dev,
569 sizeof(*jzfb->framedesc),
570 &jzfb->framedesc_phys, GFP_KERNEL);
571
572 if (!jzfb->framedesc)
573 return -ENOMEM;
574
575 jzfb->vidmem_size = PAGE_ALIGN(max_videosize);
576 jzfb->vidmem = dma_alloc_coherent(&jzfb->pdev->dev,
577 jzfb->vidmem_size,
578 &jzfb->vidmem_phys, GFP_KERNEL);
579
580 if (!jzfb->vidmem)
581 goto err_free_framedesc;
582
583 for (page = jzfb->vidmem;
584 page < jzfb->vidmem + PAGE_ALIGN(jzfb->vidmem_size);
585 page += PAGE_SIZE) {
586 SetPageReserved(virt_to_page(page));
587 }
588
589 jzfb->framedesc->next = jzfb->framedesc_phys;
590 jzfb->framedesc->addr = jzfb->vidmem_phys;
591 jzfb->framedesc->id = 0xdeafbead;
592 jzfb->framedesc->cmd = 0;
593 jzfb->framedesc->cmd |= max_videosize / 4;
594
595 return 0;
596
597err_free_framedesc:
598 dma_free_coherent(&jzfb->pdev->dev, sizeof(*jzfb->framedesc),
599 jzfb->framedesc, jzfb->framedesc_phys);
600 return -ENOMEM;
601}
602
603static void jzfb_free_devmem(struct jzfb *jzfb)
604{
605 dma_free_coherent(&jzfb->pdev->dev, jzfb->vidmem_size,
606 jzfb->vidmem, jzfb->vidmem_phys);
607 dma_free_coherent(&jzfb->pdev->dev, sizeof(*jzfb->framedesc),
608 jzfb->framedesc, jzfb->framedesc_phys);
609}
610
611static struct fb_ops jzfb_ops = {
612 .owner = THIS_MODULE,
613 .fb_check_var = jzfb_check_var,
614 .fb_set_par = jzfb_set_par,
615 .fb_blank = jzfb_blank,
616 .fb_fillrect = sys_fillrect,
617 .fb_copyarea = sys_copyarea,
618 .fb_imageblit = sys_imageblit,
619 .fb_setcolreg = jzfb_setcolreg,
620};
621
622static int __devinit jzfb_probe(struct platform_device *pdev)
623{
624 int ret;
625 struct jzfb *jzfb;
626 struct fb_info *fb;
627 struct jz4740_fb_platform_data *pdata = pdev->dev.platform_data;
628 struct resource *mem;
629
630 if (!pdata) {
631 dev_err(&pdev->dev, "Missing platform data\n");
632 return -ENXIO;
633 }
634
635 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
636 if (!mem) {
637 dev_err(&pdev->dev, "Failed to get register memory resource\n");
638 return -ENXIO;
639 }
640
641 mem = request_mem_region(mem->start, resource_size(mem), pdev->name);
642 if (!mem) {
643 dev_err(&pdev->dev, "Failed to request register memory region\n");
644 return -EBUSY;
645 }
646
647 fb = framebuffer_alloc(sizeof(struct jzfb), &pdev->dev);
648 if (!fb) {
649 dev_err(&pdev->dev, "Failed to allocate framebuffer device\n");
650 ret = -ENOMEM;
651 goto err_release_mem_region;
652 }
653
654 fb->fbops = &jzfb_ops;
655 fb->flags = FBINFO_DEFAULT;
656
657 jzfb = fb->par;
658 jzfb->pdev = pdev;
659 jzfb->pdata = pdata;
660 jzfb->mem = mem;
661
662 jzfb->ldclk = clk_get(&pdev->dev, "lcd");
663 if (IS_ERR(jzfb->ldclk)) {
664 ret = PTR_ERR(jzfb->ldclk);
665 dev_err(&pdev->dev, "Failed to get lcd clock: %d\n", ret);
666 goto err_framebuffer_release;
667 }
668
669 jzfb->lpclk = clk_get(&pdev->dev, "lcd_pclk");
670 if (IS_ERR(jzfb->lpclk)) {
671 ret = PTR_ERR(jzfb->lpclk);
672 dev_err(&pdev->dev, "Failed to get lcd pixel clock: %d\n", ret);
673 goto err_put_ldclk;
674 }
675
676 jzfb->base = ioremap(mem->start, resource_size(mem));
677 if (!jzfb->base) {
678 dev_err(&pdev->dev, "Failed to ioremap register memory region\n");
679 ret = -EBUSY;
680 goto err_put_lpclk;
681 }
682
683 platform_set_drvdata(pdev, jzfb);
684
685 mutex_init(&jzfb->lock);
686
687 fb_videomode_to_modelist(pdata->modes, pdata->num_modes,
688 &fb->modelist);
689 fb_videomode_to_var(&fb->var, pdata->modes);
690 fb->var.bits_per_pixel = pdata->bpp;
691 jzfb_check_var(&fb->var, fb);
692
693 ret = jzfb_alloc_devmem(jzfb);
694 if (ret) {
695 dev_err(&pdev->dev, "Failed to allocate video memory\n");
696 goto err_iounmap;
697 }
698
699 fb->fix = jzfb_fix;
700 fb->fix.line_length = fb->var.bits_per_pixel * fb->var.xres / 8;
701 fb->fix.mmio_start = mem->start;
702 fb->fix.mmio_len = resource_size(mem);
703 fb->fix.smem_start = jzfb->vidmem_phys;
704 fb->fix.smem_len = fb->fix.line_length * fb->var.yres;
705 fb->screen_base = jzfb->vidmem;
706 fb->pseudo_palette = jzfb->pseudo_palette;
707
708 fb_alloc_cmap(&fb->cmap, 256, 0);
709
710 clk_enable(jzfb->ldclk);
711 jzfb->is_enabled = 1;
712
713 writel(jzfb->framedesc->next, jzfb->base + JZ_REG_LCD_DA0);
714
715 fb->mode = NULL;
716 jzfb_set_par(fb);
717
718 jz_gpio_bulk_request(jz_lcd_ctrl_pins, jzfb_num_ctrl_pins(jzfb));
719 jz_gpio_bulk_request(jz_lcd_data_pins, jzfb_num_data_pins(jzfb));
720
721 ret = register_framebuffer(fb);
722 if (ret) {
723 dev_err(&pdev->dev, "Failed to register framebuffer: %d\n", ret);
724 goto err_free_devmem;
725 }
726
727 jzfb->fb = fb;
728
729 return 0;
730
731err_free_devmem:
732 jz_gpio_bulk_free(jz_lcd_ctrl_pins, jzfb_num_ctrl_pins(jzfb));
733 jz_gpio_bulk_free(jz_lcd_data_pins, jzfb_num_data_pins(jzfb));
734
735 fb_dealloc_cmap(&fb->cmap);
736 jzfb_free_devmem(jzfb);
737err_iounmap:
738 iounmap(jzfb->base);
739err_put_lpclk:
740 clk_put(jzfb->lpclk);
741err_put_ldclk:
742 clk_put(jzfb->ldclk);
743err_framebuffer_release:
744 framebuffer_release(fb);
745err_release_mem_region:
746 release_mem_region(mem->start, resource_size(mem));
747 return ret;
748}
749
750static int __devexit jzfb_remove(struct platform_device *pdev)
751{
752 struct jzfb *jzfb = platform_get_drvdata(pdev);
753
754 jzfb_blank(FB_BLANK_POWERDOWN, jzfb->fb);
755
756 jz_gpio_bulk_free(jz_lcd_ctrl_pins, jzfb_num_ctrl_pins(jzfb));
757 jz_gpio_bulk_free(jz_lcd_data_pins, jzfb_num_data_pins(jzfb));
758
759 iounmap(jzfb->base);
760 release_mem_region(jzfb->mem->start, resource_size(jzfb->mem));
761
762 fb_dealloc_cmap(&jzfb->fb->cmap);
763 jzfb_free_devmem(jzfb);
764
765 platform_set_drvdata(pdev, NULL);
766
767 clk_put(jzfb->lpclk);
768 clk_put(jzfb->ldclk);
769
770 framebuffer_release(jzfb->fb);
771
772 return 0;
773}
774
775#ifdef CONFIG_PM
776
777static int jzfb_suspend(struct device *dev)
778{
779 struct jzfb *jzfb = dev_get_drvdata(dev);
780
781 acquire_console_sem();
782 fb_set_suspend(jzfb->fb, 1);
783 release_console_sem();
784
785 mutex_lock(&jzfb->lock);
786 if (jzfb->is_enabled)
787 jzfb_disable(jzfb);
788 mutex_unlock(&jzfb->lock);
789
790 return 0;
791}
792
793static int jzfb_resume(struct device *dev)
794{
795 struct jzfb *jzfb = dev_get_drvdata(dev);
796 clk_enable(jzfb->ldclk);
797
798 mutex_lock(&jzfb->lock);
799 if (jzfb->is_enabled)
800 jzfb_enable(jzfb);
801 mutex_unlock(&jzfb->lock);
802
803 acquire_console_sem();
804 fb_set_suspend(jzfb->fb, 0);
805 release_console_sem();
806
807 return 0;
808}
809
810static const struct dev_pm_ops jzfb_pm_ops = {
811 .suspend = jzfb_suspend,
812 .resume = jzfb_resume,
813 .poweroff = jzfb_suspend,
814 .restore = jzfb_resume,
815};
816
817#define JZFB_PM_OPS (&jzfb_pm_ops)
818
819#else
820#define JZFB_PM_OPS NULL
821#endif
822
823static struct platform_driver jzfb_driver = {
824 .probe = jzfb_probe,
825 .remove = __devexit_p(jzfb_remove),
826 .driver = {
827 .name = "jz4740-fb",
828 .pm = JZFB_PM_OPS,
829 },
830};
831
832static int __init jzfb_init(void)
833{
834 return platform_driver_register(&jzfb_driver);
835}
836module_init(jzfb_init);
837
838static void __exit jzfb_exit(void)
839{
840 platform_driver_unregister(&jzfb_driver);
841}
842module_exit(jzfb_exit);
843
844MODULE_LICENSE("GPL");
845MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
846MODULE_DESCRIPTION("JZ4740 SoC LCD framebuffer driver");
847MODULE_ALIAS("platform:jz4740-fb");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-19 09:50:15 -0500