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xen/grant-table: Use put_page instead of free_page
[linux/fpc-iii.git] / drivers / video / fbdev / mx3fb.c
blob1c3c7ab26a959d7dd88f8da0d25f7bc9cecaed9d
1 /*
2 * Copyright (C) 2008
3 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
4 *
5 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/platform_device.h>
15 #include <linux/sched.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/interrupt.h>
19 #include <linux/slab.h>
20 #include <linux/fb.h>
21 #include <linux/delay.h>
22 #include <linux/init.h>
23 #include <linux/ioport.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/dmaengine.h>
26 #include <linux/console.h>
27 #include <linux/clk.h>
28 #include <linux/mutex.h>
29 #include <linux/dma/ipu-dma.h>
30 #include <linux/backlight.h>
31
32 #include <linux/platform_data/dma-imx.h>
33 #include <linux/platform_data/video-mx3fb.h>
34
35 #include <asm/io.h>
36 #include <linux/uaccess.h>
37
38 #define MX3FB_NAME "mx3_sdc_fb"
39
40 #define MX3FB_REG_OFFSET 0xB4
41
42 /* SDC Registers */
43 #define SDC_COM_CONF (0xB4 - MX3FB_REG_OFFSET)
44 #define SDC_GW_CTRL (0xB8 - MX3FB_REG_OFFSET)
45 #define SDC_FG_POS (0xBC - MX3FB_REG_OFFSET)
46 #define SDC_BG_POS (0xC0 - MX3FB_REG_OFFSET)
47 #define SDC_CUR_POS (0xC4 - MX3FB_REG_OFFSET)
48 #define SDC_PWM_CTRL (0xC8 - MX3FB_REG_OFFSET)
49 #define SDC_CUR_MAP (0xCC - MX3FB_REG_OFFSET)
50 #define SDC_HOR_CONF (0xD0 - MX3FB_REG_OFFSET)
51 #define SDC_VER_CONF (0xD4 - MX3FB_REG_OFFSET)
52 #define SDC_SHARP_CONF_1 (0xD8 - MX3FB_REG_OFFSET)
53 #define SDC_SHARP_CONF_2 (0xDC - MX3FB_REG_OFFSET)
54
55 /* Register bits */
56 #define SDC_COM_TFT_COLOR 0x00000001UL
57 #define SDC_COM_FG_EN 0x00000010UL
58 #define SDC_COM_GWSEL 0x00000020UL
59 #define SDC_COM_GLB_A 0x00000040UL
60 #define SDC_COM_KEY_COLOR_G 0x00000080UL
61 #define SDC_COM_BG_EN 0x00000200UL
62 #define SDC_COM_SHARP 0x00001000UL
63
64 #define SDC_V_SYNC_WIDTH_L 0x00000001UL
65
66 /* Display Interface registers */
67 #define DI_DISP_IF_CONF (0x0124 - MX3FB_REG_OFFSET)
68 #define DI_DISP_SIG_POL (0x0128 - MX3FB_REG_OFFSET)
69 #define DI_SER_DISP1_CONF (0x012C - MX3FB_REG_OFFSET)
70 #define DI_SER_DISP2_CONF (0x0130 - MX3FB_REG_OFFSET)
71 #define DI_HSP_CLK_PER (0x0134 - MX3FB_REG_OFFSET)
72 #define DI_DISP0_TIME_CONF_1 (0x0138 - MX3FB_REG_OFFSET)
73 #define DI_DISP0_TIME_CONF_2 (0x013C - MX3FB_REG_OFFSET)
74 #define DI_DISP0_TIME_CONF_3 (0x0140 - MX3FB_REG_OFFSET)
75 #define DI_DISP1_TIME_CONF_1 (0x0144 - MX3FB_REG_OFFSET)
76 #define DI_DISP1_TIME_CONF_2 (0x0148 - MX3FB_REG_OFFSET)
77 #define DI_DISP1_TIME_CONF_3 (0x014C - MX3FB_REG_OFFSET)
78 #define DI_DISP2_TIME_CONF_1 (0x0150 - MX3FB_REG_OFFSET)
79 #define DI_DISP2_TIME_CONF_2 (0x0154 - MX3FB_REG_OFFSET)
80 #define DI_DISP2_TIME_CONF_3 (0x0158 - MX3FB_REG_OFFSET)
81 #define DI_DISP3_TIME_CONF (0x015C - MX3FB_REG_OFFSET)
82 #define DI_DISP0_DB0_MAP (0x0160 - MX3FB_REG_OFFSET)
83 #define DI_DISP0_DB1_MAP (0x0164 - MX3FB_REG_OFFSET)
84 #define DI_DISP0_DB2_MAP (0x0168 - MX3FB_REG_OFFSET)
85 #define DI_DISP0_CB0_MAP (0x016C - MX3FB_REG_OFFSET)
86 #define DI_DISP0_CB1_MAP (0x0170 - MX3FB_REG_OFFSET)
87 #define DI_DISP0_CB2_MAP (0x0174 - MX3FB_REG_OFFSET)
88 #define DI_DISP1_DB0_MAP (0x0178 - MX3FB_REG_OFFSET)
89 #define DI_DISP1_DB1_MAP (0x017C - MX3FB_REG_OFFSET)
90 #define DI_DISP1_DB2_MAP (0x0180 - MX3FB_REG_OFFSET)
91 #define DI_DISP1_CB0_MAP (0x0184 - MX3FB_REG_OFFSET)
92 #define DI_DISP1_CB1_MAP (0x0188 - MX3FB_REG_OFFSET)
93 #define DI_DISP1_CB2_MAP (0x018C - MX3FB_REG_OFFSET)
94 #define DI_DISP2_DB0_MAP (0x0190 - MX3FB_REG_OFFSET)
95 #define DI_DISP2_DB1_MAP (0x0194 - MX3FB_REG_OFFSET)
96 #define DI_DISP2_DB2_MAP (0x0198 - MX3FB_REG_OFFSET)
97 #define DI_DISP2_CB0_MAP (0x019C - MX3FB_REG_OFFSET)
98 #define DI_DISP2_CB1_MAP (0x01A0 - MX3FB_REG_OFFSET)
99 #define DI_DISP2_CB2_MAP (0x01A4 - MX3FB_REG_OFFSET)
100 #define DI_DISP3_B0_MAP (0x01A8 - MX3FB_REG_OFFSET)
101 #define DI_DISP3_B1_MAP (0x01AC - MX3FB_REG_OFFSET)
102 #define DI_DISP3_B2_MAP (0x01B0 - MX3FB_REG_OFFSET)
103 #define DI_DISP_ACC_CC (0x01B4 - MX3FB_REG_OFFSET)
104 #define DI_DISP_LLA_CONF (0x01B8 - MX3FB_REG_OFFSET)
105 #define DI_DISP_LLA_DATA (0x01BC - MX3FB_REG_OFFSET)
106
107 /* DI_DISP_SIG_POL bits */
108 #define DI_D3_VSYNC_POL_SHIFT 28
109 #define DI_D3_HSYNC_POL_SHIFT 27
110 #define DI_D3_DRDY_SHARP_POL_SHIFT 26
111 #define DI_D3_CLK_POL_SHIFT 25
112 #define DI_D3_DATA_POL_SHIFT 24
113
114 /* DI_DISP_IF_CONF bits */
115 #define DI_D3_CLK_IDLE_SHIFT 26
116 #define DI_D3_CLK_SEL_SHIFT 25
117 #define DI_D3_DATAMSK_SHIFT 24
118
119 enum ipu_panel {
120 IPU_PANEL_SHARP_TFT,
121 IPU_PANEL_TFT,
122 };
123
124 struct ipu_di_signal_cfg {
125 unsigned datamask_en:1;
126 unsigned clksel_en:1;
127 unsigned clkidle_en:1;
128 unsigned data_pol:1; /* true = inverted */
129 unsigned clk_pol:1; /* true = rising edge */
130 unsigned enable_pol:1;
131 unsigned Hsync_pol:1; /* true = active high */
132 unsigned Vsync_pol:1;
133 };
134
135 static const struct fb_videomode mx3fb_modedb[] = {
136 {
137 /* 240x320 @ 60 Hz */
138 .name = "Sharp-QVGA",
139 .refresh = 60,
140 .xres = 240,
141 .yres = 320,
142 .pixclock = 185925,
143 .left_margin = 9,
144 .right_margin = 16,
145 .upper_margin = 7,
146 .lower_margin = 9,
147 .hsync_len = 1,
148 .vsync_len = 1,
149 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
150 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
151 FB_SYNC_CLK_IDLE_EN,
152 .vmode = FB_VMODE_NONINTERLACED,
153 .flag = 0,
154 }, {
155 /* 240x33 @ 60 Hz */
156 .name = "Sharp-CLI",
157 .refresh = 60,
158 .xres = 240,
159 .yres = 33,
160 .pixclock = 185925,
161 .left_margin = 9,
162 .right_margin = 16,
163 .upper_margin = 7,
164 .lower_margin = 9 + 287,
165 .hsync_len = 1,
166 .vsync_len = 1,
167 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
168 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
169 FB_SYNC_CLK_IDLE_EN,
170 .vmode = FB_VMODE_NONINTERLACED,
171 .flag = 0,
172 }, {
173 /* 640x480 @ 60 Hz */
174 .name = "NEC-VGA",
175 .refresh = 60,
176 .xres = 640,
177 .yres = 480,
178 .pixclock = 38255,
179 .left_margin = 144,
180 .right_margin = 0,
181 .upper_margin = 34,
182 .lower_margin = 40,
183 .hsync_len = 1,
184 .vsync_len = 1,
185 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_OE_ACT_HIGH,
186 .vmode = FB_VMODE_NONINTERLACED,
187 .flag = 0,
188 }, {
189 /* NTSC TV output */
190 .name = "TV-NTSC",
191 .refresh = 60,
192 .xres = 640,
193 .yres = 480,
194 .pixclock = 37538,
195 .left_margin = 38,
196 .right_margin = 858 - 640 - 38 - 3,
197 .upper_margin = 36,
198 .lower_margin = 518 - 480 - 36 - 1,
199 .hsync_len = 3,
200 .vsync_len = 1,
201 .sync = 0,
202 .vmode = FB_VMODE_NONINTERLACED,
203 .flag = 0,
204 }, {
205 /* PAL TV output */
206 .name = "TV-PAL",
207 .refresh = 50,
208 .xres = 640,
209 .yres = 480,
210 .pixclock = 37538,
211 .left_margin = 38,
212 .right_margin = 960 - 640 - 38 - 32,
213 .upper_margin = 32,
214 .lower_margin = 555 - 480 - 32 - 3,
215 .hsync_len = 32,
216 .vsync_len = 3,
217 .sync = 0,
218 .vmode = FB_VMODE_NONINTERLACED,
219 .flag = 0,
220 }, {
221 /* TV output VGA mode, 640x480 @ 65 Hz */
222 .name = "TV-VGA",
223 .refresh = 60,
224 .xres = 640,
225 .yres = 480,
226 .pixclock = 40574,
227 .left_margin = 35,
228 .right_margin = 45,
229 .upper_margin = 9,
230 .lower_margin = 1,
231 .hsync_len = 46,
232 .vsync_len = 5,
233 .sync = 0,
234 .vmode = FB_VMODE_NONINTERLACED,
235 .flag = 0,
236 },
237 };
238
239 struct mx3fb_data {
240 struct fb_info *fbi;
241 int backlight_level;
242 void __iomem *reg_base;
243 spinlock_t lock;
244 struct device *dev;
245 struct backlight_device *bl;
246
247 uint32_t h_start_width;
248 uint32_t v_start_width;
249 enum disp_data_mapping disp_data_fmt;
250 };
251
252 struct dma_chan_request {
253 struct mx3fb_data *mx3fb;
254 enum ipu_channel id;
255 };
256
257 /* MX3 specific framebuffer information. */
258 struct mx3fb_info {
259 int blank;
260 enum ipu_channel ipu_ch;
261 uint32_t cur_ipu_buf;
262
263 u32 pseudo_palette[16];
264
265 struct completion flip_cmpl;
266 struct mutex mutex; /* Protects fb-ops */
267 struct mx3fb_data *mx3fb;
268 struct idmac_channel *idmac_channel;
269 struct dma_async_tx_descriptor *txd;
270 dma_cookie_t cookie;
271 struct scatterlist sg[2];
272
273 struct fb_var_screeninfo cur_var; /* current var info */
274 };
275
276 static void sdc_set_brightness(struct mx3fb_data *mx3fb, uint8_t value);
277 static u32 sdc_get_brightness(struct mx3fb_data *mx3fb);
278
279 static int mx3fb_bl_get_brightness(struct backlight_device *bl)
280 {
281 struct mx3fb_data *fbd = bl_get_data(bl);
282
283 return sdc_get_brightness(fbd);
284 }
285
286 static int mx3fb_bl_update_status(struct backlight_device *bl)
287 {
288 struct mx3fb_data *fbd = bl_get_data(bl);
289 int brightness = bl->props.brightness;
290
291 if (bl->props.power != FB_BLANK_UNBLANK)
292 brightness = 0;
293 if (bl->props.fb_blank != FB_BLANK_UNBLANK)
294 brightness = 0;
295
296 fbd->backlight_level = (fbd->backlight_level & ~0xFF) | brightness;
297
298 sdc_set_brightness(fbd, fbd->backlight_level);
299
300 return 0;
301 }
302
303 static const struct backlight_ops mx3fb_lcdc_bl_ops = {
304 .update_status = mx3fb_bl_update_status,
305 .get_brightness = mx3fb_bl_get_brightness,
306 };
307
308 static void mx3fb_init_backlight(struct mx3fb_data *fbd)
309 {
310 struct backlight_properties props;
311 struct backlight_device *bl;
312
313 if (fbd->bl)
314 return;
315
316 memset(&props, 0, sizeof(struct backlight_properties));
317 props.max_brightness = 0xff;
318 props.type = BACKLIGHT_RAW;
319 sdc_set_brightness(fbd, fbd->backlight_level);
320
321 bl = backlight_device_register("mx3fb-bl", fbd->dev, fbd,
322 &mx3fb_lcdc_bl_ops, &props);
323 if (IS_ERR(bl)) {
324 dev_err(fbd->dev, "error %ld on backlight register\n",
325 PTR_ERR(bl));
326 return;
327 }
328
329 fbd->bl = bl;
330 bl->props.power = FB_BLANK_UNBLANK;
331 bl->props.fb_blank = FB_BLANK_UNBLANK;
332 bl->props.brightness = mx3fb_bl_get_brightness(bl);
333 }
334
335 static void mx3fb_exit_backlight(struct mx3fb_data *fbd)
336 {
337 backlight_device_unregister(fbd->bl);
338 }
339
340 static void mx3fb_dma_done(void *);
341
342 /* Used fb-mode and bpp. Can be set on kernel command line, therefore file-static. */
343 static const char *fb_mode;
344 static unsigned long default_bpp = 16;
345
346 static u32 mx3fb_read_reg(struct mx3fb_data *mx3fb, unsigned long reg)
347 {
348 return __raw_readl(mx3fb->reg_base + reg);
349 }
350
351 static void mx3fb_write_reg(struct mx3fb_data *mx3fb, u32 value, unsigned long reg)
352 {
353 __raw_writel(value, mx3fb->reg_base + reg);
354 }
355
356 struct di_mapping {
357 uint32_t b0, b1, b2;
358 };
359
360 static const struct di_mapping di_mappings[] = {
361 [IPU_DISP_DATA_MAPPING_RGB666] = { 0x0005000f, 0x000b000f, 0x0011000f },
362 [IPU_DISP_DATA_MAPPING_RGB565] = { 0x0004003f, 0x000a000f, 0x000f003f },
363 [IPU_DISP_DATA_MAPPING_RGB888] = { 0x00070000, 0x000f0000, 0x00170000 },
364 };
365
366 static void sdc_fb_init(struct mx3fb_info *fbi)
367 {
368 struct mx3fb_data *mx3fb = fbi->mx3fb;
369 uint32_t reg;
370
371 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
372
373 mx3fb_write_reg(mx3fb, reg | SDC_COM_BG_EN, SDC_COM_CONF);
374 }
375
376 /* Returns enabled flag before uninit */
377 static uint32_t sdc_fb_uninit(struct mx3fb_info *fbi)
378 {
379 struct mx3fb_data *mx3fb = fbi->mx3fb;
380 uint32_t reg;
381
382 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
383
384 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_BG_EN, SDC_COM_CONF);
385
386 return reg & SDC_COM_BG_EN;
387 }
388
389 static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)
390 {
391 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
392 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
393 struct dma_chan *dma_chan = &ichan->dma_chan;
394 unsigned long flags;
395 dma_cookie_t cookie;
396
397 if (mx3_fbi->txd)
398 dev_dbg(mx3fb->dev, "mx3fbi %p, desc %p, sg %p\n", mx3_fbi,
399 to_tx_desc(mx3_fbi->txd), to_tx_desc(mx3_fbi->txd)->sg);
400 else
401 dev_dbg(mx3fb->dev, "mx3fbi %p, txd = NULL\n", mx3_fbi);
402
403 /* This enables the channel */
404 if (mx3_fbi->cookie < 0) {
405 mx3_fbi->txd = dmaengine_prep_slave_sg(dma_chan,
406 &mx3_fbi->sg[0], 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
407 if (!mx3_fbi->txd) {
408 dev_err(mx3fb->dev, "Cannot allocate descriptor on %d\n",
409 dma_chan->chan_id);
410 return;
411 }
412
413 mx3_fbi->txd->callback_param = mx3_fbi->txd;
414 mx3_fbi->txd->callback = mx3fb_dma_done;
415
416 cookie = mx3_fbi->txd->tx_submit(mx3_fbi->txd);
417 dev_dbg(mx3fb->dev, "%d: Submit %p #%d [%c]\n", __LINE__,
418 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
419 } else {
420 if (!mx3_fbi->txd || !mx3_fbi->txd->tx_submit) {
421 dev_err(mx3fb->dev, "Cannot enable channel %d\n",
422 dma_chan->chan_id);
423 return;
424 }
425
426 /* Just re-activate the same buffer */
427 dma_async_issue_pending(dma_chan);
428 cookie = mx3_fbi->cookie;
429 dev_dbg(mx3fb->dev, "%d: Re-submit %p #%d [%c]\n", __LINE__,
430 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
431 }
432
433 if (cookie >= 0) {
434 spin_lock_irqsave(&mx3fb->lock, flags);
435 sdc_fb_init(mx3_fbi);
436 mx3_fbi->cookie = cookie;
437 spin_unlock_irqrestore(&mx3fb->lock, flags);
438 }
439
440 /*
441 * Attention! Without this msleep the channel keeps generating
442 * interrupts. Next sdc_set_brightness() is going to be called
443 * from mx3fb_blank().
444 */
445 msleep(2);
446 }
447
448 static void sdc_disable_channel(struct mx3fb_info *mx3_fbi)
449 {
450 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
451 uint32_t enabled;
452 unsigned long flags;
453
454 if (mx3_fbi->txd == NULL)
455 return;
456
457 spin_lock_irqsave(&mx3fb->lock, flags);
458
459 enabled = sdc_fb_uninit(mx3_fbi);
460
461 spin_unlock_irqrestore(&mx3fb->lock, flags);
462
463 dmaengine_terminate_all(mx3_fbi->txd->chan);
464 mx3_fbi->txd = NULL;
465 mx3_fbi->cookie = -EINVAL;
466 }
467
468 /**
469 * sdc_set_window_pos() - set window position of the respective plane.
470 * @mx3fb: mx3fb context.
471 * @channel: IPU DMAC channel ID.
472 * @x_pos: X coordinate relative to the top left corner to place window at.
473 * @y_pos: Y coordinate relative to the top left corner to place window at.
474 * @return: 0 on success or negative error code on failure.
475 */
476 static int sdc_set_window_pos(struct mx3fb_data *mx3fb, enum ipu_channel channel,
477 int16_t x_pos, int16_t y_pos)
478 {
479 if (channel != IDMAC_SDC_0)
480 return -EINVAL;
481
482 x_pos += mx3fb->h_start_width;
483 y_pos += mx3fb->v_start_width;
484
485 mx3fb_write_reg(mx3fb, (x_pos << 16) | y_pos, SDC_BG_POS);
486 return 0;
487 }
488
489 /**
490 * sdc_init_panel() - initialize a synchronous LCD panel.
491 * @mx3fb: mx3fb context.
492 * @panel: panel type.
493 * @pixel_clk: desired pixel clock frequency in Hz.
494 * @width: width of panel in pixels.
495 * @height: height of panel in pixels.
496 * @h_start_width: number of pixel clocks between the HSYNC signal pulse
497 * and the start of valid data.
498 * @h_sync_width: width of the HSYNC signal in units of pixel clocks.
499 * @h_end_width: number of pixel clocks between the end of valid data
500 * and the HSYNC signal for next line.
501 * @v_start_width: number of lines between the VSYNC signal pulse and the
502 * start of valid data.
503 * @v_sync_width: width of the VSYNC signal in units of lines
504 * @v_end_width: number of lines between the end of valid data and the
505 * VSYNC signal for next frame.
506 * @sig: bitfield of signal polarities for LCD interface.
507 * @return: 0 on success or negative error code on failure.
508 */
509 static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
510 uint32_t pixel_clk,
511 uint16_t width, uint16_t height,
512 uint16_t h_start_width, uint16_t h_sync_width,
513 uint16_t h_end_width, uint16_t v_start_width,
514 uint16_t v_sync_width, uint16_t v_end_width,
515 struct ipu_di_signal_cfg sig)
516 {
517 unsigned long lock_flags;
518 uint32_t reg;
519 uint32_t old_conf;
520 uint32_t div;
521 struct clk *ipu_clk;
522 const struct di_mapping *map;
523
524 dev_dbg(mx3fb->dev, "panel size = %d x %d", width, height);
525
526 if (v_sync_width == 0 || h_sync_width == 0)
527 return -EINVAL;
528
529 /* Init panel size and blanking periods */
530 reg = ((uint32_t) (h_sync_width - 1) << 26) |
531 ((uint32_t) (width + h_start_width + h_end_width - 1) << 16);
532 mx3fb_write_reg(mx3fb, reg, SDC_HOR_CONF);
533
534 #ifdef DEBUG
535 printk(KERN_CONT " hor_conf %x,", reg);
536 #endif
537
538 reg = ((uint32_t) (v_sync_width - 1) << 26) | SDC_V_SYNC_WIDTH_L |
539 ((uint32_t) (height + v_start_width + v_end_width - 1) << 16);
540 mx3fb_write_reg(mx3fb, reg, SDC_VER_CONF);
541
542 #ifdef DEBUG
543 printk(KERN_CONT " ver_conf %x\n", reg);
544 #endif
545
546 mx3fb->h_start_width = h_start_width;
547 mx3fb->v_start_width = v_start_width;
548
549 switch (panel) {
550 case IPU_PANEL_SHARP_TFT:
551 mx3fb_write_reg(mx3fb, 0x00FD0102L, SDC_SHARP_CONF_1);
552 mx3fb_write_reg(mx3fb, 0x00F500F4L, SDC_SHARP_CONF_2);
553 mx3fb_write_reg(mx3fb, SDC_COM_SHARP | SDC_COM_TFT_COLOR, SDC_COM_CONF);
554 break;
555 case IPU_PANEL_TFT:
556 mx3fb_write_reg(mx3fb, SDC_COM_TFT_COLOR, SDC_COM_CONF);
557 break;
558 default:
559 return -EINVAL;
560 }
561
562 /* Init clocking */
563
564 /*
565 * Calculate divider: fractional part is 4 bits so simply multiple by
566 * 2^4 to get fractional part, as long as we stay under ~250MHz and on
567 * i.MX31 it (HSP_CLK) is <= 178MHz. Currently 128.267MHz
568 */
569 ipu_clk = clk_get(mx3fb->dev, NULL);
570 if (!IS_ERR(ipu_clk)) {
571 div = clk_get_rate(ipu_clk) * 16 / pixel_clk;
572 clk_put(ipu_clk);
573 } else {
574 div = 0;
575 }
576
577 if (div < 0x40) { /* Divider less than 4 */
578 dev_dbg(mx3fb->dev,
579 "InitPanel() - Pixel clock divider less than 4\n");
580 div = 0x40;
581 }
582
583 dev_dbg(mx3fb->dev, "pixel clk = %u, divider %u.%u\n",
584 pixel_clk, div >> 4, (div & 7) * 125);
585
586 spin_lock_irqsave(&mx3fb->lock, lock_flags);
587
588 /*
589 * DISP3_IF_CLK_DOWN_WR is half the divider value and 2 fraction bits
590 * fewer. Subtract 1 extra from DISP3_IF_CLK_DOWN_WR based on timing
591 * debug. DISP3_IF_CLK_UP_WR is 0
592 */
593 mx3fb_write_reg(mx3fb, (((div / 8) - 1) << 22) | div, DI_DISP3_TIME_CONF);
594
595 /* DI settings */
596 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF) & 0x78FFFFFF;
597 old_conf |= sig.datamask_en << DI_D3_DATAMSK_SHIFT |
598 sig.clksel_en << DI_D3_CLK_SEL_SHIFT |
599 sig.clkidle_en << DI_D3_CLK_IDLE_SHIFT;
600 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_IF_CONF);
601
602 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL) & 0xE0FFFFFF;
603 old_conf |= sig.data_pol << DI_D3_DATA_POL_SHIFT |
604 sig.clk_pol << DI_D3_CLK_POL_SHIFT |
605 sig.enable_pol << DI_D3_DRDY_SHARP_POL_SHIFT |
606 sig.Hsync_pol << DI_D3_HSYNC_POL_SHIFT |
607 sig.Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
608 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_SIG_POL);
609
610 map = &di_mappings[mx3fb->disp_data_fmt];
611 mx3fb_write_reg(mx3fb, map->b0, DI_DISP3_B0_MAP);
612 mx3fb_write_reg(mx3fb, map->b1, DI_DISP3_B1_MAP);
613 mx3fb_write_reg(mx3fb, map->b2, DI_DISP3_B2_MAP);
614
615 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
616
617 dev_dbg(mx3fb->dev, "DI_DISP_IF_CONF = 0x%08X\n",
618 mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF));
619 dev_dbg(mx3fb->dev, "DI_DISP_SIG_POL = 0x%08X\n",
620 mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL));
621 dev_dbg(mx3fb->dev, "DI_DISP3_TIME_CONF = 0x%08X\n",
622 mx3fb_read_reg(mx3fb, DI_DISP3_TIME_CONF));
623
624 return 0;
625 }
626
627 /**
628 * sdc_set_color_key() - set the transparent color key for SDC graphic plane.
629 * @mx3fb: mx3fb context.
630 * @channel: IPU DMAC channel ID.
631 * @enable: boolean to enable or disable color keyl.
632 * @color_key: 24-bit RGB color to use as transparent color key.
633 * @return: 0 on success or negative error code on failure.
634 */
635 static int sdc_set_color_key(struct mx3fb_data *mx3fb, enum ipu_channel channel,
636 bool enable, uint32_t color_key)
637 {
638 uint32_t reg, sdc_conf;
639 unsigned long lock_flags;
640
641 spin_lock_irqsave(&mx3fb->lock, lock_flags);
642
643 sdc_conf = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
644 if (channel == IDMAC_SDC_0)
645 sdc_conf &= ~SDC_COM_GWSEL;
646 else
647 sdc_conf |= SDC_COM_GWSEL;
648
649 if (enable) {
650 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0xFF000000L;
651 mx3fb_write_reg(mx3fb, reg | (color_key & 0x00FFFFFFL),
652 SDC_GW_CTRL);
653
654 sdc_conf |= SDC_COM_KEY_COLOR_G;
655 } else {
656 sdc_conf &= ~SDC_COM_KEY_COLOR_G;
657 }
658 mx3fb_write_reg(mx3fb, sdc_conf, SDC_COM_CONF);
659
660 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
661
662 return 0;
663 }
664
665 /**
666 * sdc_set_global_alpha() - set global alpha blending modes.
667 * @mx3fb: mx3fb context.
668 * @enable: boolean to enable or disable global alpha blending. If disabled,
669 * per pixel blending is used.
670 * @alpha: global alpha value.
671 * @return: 0 on success or negative error code on failure.
672 */
673 static int sdc_set_global_alpha(struct mx3fb_data *mx3fb, bool enable, uint8_t alpha)
674 {
675 uint32_t reg;
676 unsigned long lock_flags;
677
678 spin_lock_irqsave(&mx3fb->lock, lock_flags);
679
680 if (enable) {
681 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0x00FFFFFFL;
682 mx3fb_write_reg(mx3fb, reg | ((uint32_t) alpha << 24), SDC_GW_CTRL);
683
684 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
685 mx3fb_write_reg(mx3fb, reg | SDC_COM_GLB_A, SDC_COM_CONF);
686 } else {
687 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
688 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_GLB_A, SDC_COM_CONF);
689 }
690
691 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
692
693 return 0;
694 }
695
696 static u32 sdc_get_brightness(struct mx3fb_data *mx3fb)
697 {
698 u32 brightness;
699
700 brightness = mx3fb_read_reg(mx3fb, SDC_PWM_CTRL);
701 brightness = (brightness >> 16) & 0xFF;
702
703 return brightness;
704 }
705
706 static void sdc_set_brightness(struct mx3fb_data *mx3fb, uint8_t value)
707 {
708 dev_dbg(mx3fb->dev, "%s: value = %d\n", __func__, value);
709 /* This might be board-specific */
710 mx3fb_write_reg(mx3fb, 0x03000000UL | value << 16, SDC_PWM_CTRL);
711 return;
712 }
713
714 static uint32_t bpp_to_pixfmt(int bpp)
715 {
716 uint32_t pixfmt = 0;
717 switch (bpp) {
718 case 24:
719 pixfmt = IPU_PIX_FMT_BGR24;
720 break;
721 case 32:
722 pixfmt = IPU_PIX_FMT_BGR32;
723 break;
724 case 16:
725 pixfmt = IPU_PIX_FMT_RGB565;
726 break;
727 }
728 return pixfmt;
729 }
730
731 static int mx3fb_blank(int blank, struct fb_info *fbi);
732 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
733 bool lock);
734 static int mx3fb_unmap_video_memory(struct fb_info *fbi);
735
736 /**
737 * mx3fb_set_fix() - set fixed framebuffer parameters from variable settings.
738 * @info: framebuffer information pointer
739 * @return: 0 on success or negative error code on failure.
740 */
741 static int mx3fb_set_fix(struct fb_info *fbi)
742 {
743 struct fb_fix_screeninfo *fix = &fbi->fix;
744 struct fb_var_screeninfo *var = &fbi->var;
745
746 strncpy(fix->id, "DISP3 BG", 8);
747
748 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
749
750 fix->type = FB_TYPE_PACKED_PIXELS;
751 fix->accel = FB_ACCEL_NONE;
752 fix->visual = FB_VISUAL_TRUECOLOR;
753 fix->xpanstep = 1;
754 fix->ypanstep = 1;
755
756 return 0;
757 }
758
759 static void mx3fb_dma_done(void *arg)
760 {
761 struct idmac_tx_desc *tx_desc = to_tx_desc(arg);
762 struct dma_chan *chan = tx_desc->txd.chan;
763 struct idmac_channel *ichannel = to_idmac_chan(chan);
764 struct mx3fb_data *mx3fb = ichannel->client;
765 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
766
767 dev_dbg(mx3fb->dev, "irq %d callback\n", ichannel->eof_irq);
768
769 /* We only need one interrupt, it will be re-enabled as needed */
770 disable_irq_nosync(ichannel->eof_irq);
771
772 complete(&mx3_fbi->flip_cmpl);
773 }
774
775 static bool mx3fb_must_set_par(struct fb_info *fbi)
776 {
777 struct mx3fb_info *mx3_fbi = fbi->par;
778 struct fb_var_screeninfo old_var = mx3_fbi->cur_var;
779 struct fb_var_screeninfo new_var = fbi->var;
780
781 if ((fbi->var.activate & FB_ACTIVATE_FORCE) &&
782 (fbi->var.activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW)
783 return true;
784
785 /*
786 * Ignore xoffset and yoffset update,
787 * because pan display handles this case.
788 */
789 old_var.xoffset = new_var.xoffset;
790 old_var.yoffset = new_var.yoffset;
791
792 return !!memcmp(&old_var, &new_var, sizeof(struct fb_var_screeninfo));
793 }
794
795 static int __set_par(struct fb_info *fbi, bool lock)
796 {
797 u32 mem_len, cur_xoffset, cur_yoffset;
798 struct ipu_di_signal_cfg sig_cfg;
799 enum ipu_panel mode = IPU_PANEL_TFT;
800 struct mx3fb_info *mx3_fbi = fbi->par;
801 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
802 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
803 struct idmac_video_param *video = &ichan->params.video;
804 struct scatterlist *sg = mx3_fbi->sg;
805
806 /* Total cleanup */
807 if (mx3_fbi->txd)
808 sdc_disable_channel(mx3_fbi);
809
810 mx3fb_set_fix(fbi);
811
812 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
813 if (mem_len > fbi->fix.smem_len) {
814 if (fbi->fix.smem_start)
815 mx3fb_unmap_video_memory(fbi);
816
817 if (mx3fb_map_video_memory(fbi, mem_len, lock) < 0)
818 return -ENOMEM;
819 }
820
821 sg_init_table(&sg[0], 1);
822 sg_init_table(&sg[1], 1);
823
824 sg_dma_address(&sg[0]) = fbi->fix.smem_start;
825 sg_set_page(&sg[0], virt_to_page(fbi->screen_base),
826 fbi->fix.smem_len,
827 offset_in_page(fbi->screen_base));
828
829 if (mx3_fbi->ipu_ch == IDMAC_SDC_0) {
830 memset(&sig_cfg, 0, sizeof(sig_cfg));
831 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
832 sig_cfg.Hsync_pol = true;
833 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
834 sig_cfg.Vsync_pol = true;
835 if (fbi->var.sync & FB_SYNC_CLK_INVERT)
836 sig_cfg.clk_pol = true;
837 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
838 sig_cfg.data_pol = true;
839 if (fbi->var.sync & FB_SYNC_OE_ACT_HIGH)
840 sig_cfg.enable_pol = true;
841 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
842 sig_cfg.clkidle_en = true;
843 if (fbi->var.sync & FB_SYNC_CLK_SEL_EN)
844 sig_cfg.clksel_en = true;
845 if (fbi->var.sync & FB_SYNC_SHARP_MODE)
846 mode = IPU_PANEL_SHARP_TFT;
847
848 dev_dbg(fbi->device, "pixclock = %u Hz\n",
849 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
850
851 if (sdc_init_panel(mx3fb, mode,
852 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
853 fbi->var.xres, fbi->var.yres,
854 fbi->var.left_margin,
855 fbi->var.hsync_len,
856 fbi->var.right_margin +
857 fbi->var.hsync_len,
858 fbi->var.upper_margin,
859 fbi->var.vsync_len,
860 fbi->var.lower_margin +
861 fbi->var.vsync_len, sig_cfg) != 0) {
862 dev_err(fbi->device,
863 "mx3fb: Error initializing panel.\n");
864 return -EINVAL;
865 }
866 }
867
868 sdc_set_window_pos(mx3fb, mx3_fbi->ipu_ch, 0, 0);
869
870 mx3_fbi->cur_ipu_buf = 0;
871
872 video->out_pixel_fmt = bpp_to_pixfmt(fbi->var.bits_per_pixel);
873 video->out_width = fbi->var.xres;
874 video->out_height = fbi->var.yres;
875 video->out_stride = fbi->var.xres_virtual;
876
877 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
878 sdc_enable_channel(mx3_fbi);
879 /*
880 * sg[0] points to fb smem_start address
881 * and is actually active in controller.
882 */
883 mx3_fbi->cur_var.xoffset = 0;
884 mx3_fbi->cur_var.yoffset = 0;
885 }
886
887 /*
888 * Preserve xoffset and yoffest in case they are
889 * inactive in controller as fb is blanked.
890 */
891 cur_xoffset = mx3_fbi->cur_var.xoffset;
892 cur_yoffset = mx3_fbi->cur_var.yoffset;
893 mx3_fbi->cur_var = fbi->var;
894 mx3_fbi->cur_var.xoffset = cur_xoffset;
895 mx3_fbi->cur_var.yoffset = cur_yoffset;
896
897 return 0;
898 }
899
900 /**
901 * mx3fb_set_par() - set framebuffer parameters and change the operating mode.
902 * @fbi: framebuffer information pointer.
903 * @return: 0 on success or negative error code on failure.
904 */
905 static int mx3fb_set_par(struct fb_info *fbi)
906 {
907 struct mx3fb_info *mx3_fbi = fbi->par;
908 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
909 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
910 int ret;
911
912 dev_dbg(mx3fb->dev, "%s [%c]\n", __func__, list_empty(&ichan->queue) ? '-' : '+');
913
914 mutex_lock(&mx3_fbi->mutex);
915
916 ret = mx3fb_must_set_par(fbi) ? __set_par(fbi, true) : 0;
917
918 mutex_unlock(&mx3_fbi->mutex);
919
920 return ret;
921 }
922
923 /**
924 * mx3fb_check_var() - check and adjust framebuffer variable parameters.
925 * @var: framebuffer variable parameters
926 * @fbi: framebuffer information pointer
927 */
928 static int mx3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
929 {
930 struct mx3fb_info *mx3_fbi = fbi->par;
931 u32 vtotal;
932 u32 htotal;
933
934 dev_dbg(fbi->device, "%s\n", __func__);
935
936 if (var->xres_virtual < var->xres)
937 var->xres_virtual = var->xres;
938 if (var->yres_virtual < var->yres)
939 var->yres_virtual = var->yres;
940
941 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
942 (var->bits_per_pixel != 16))
943 var->bits_per_pixel = default_bpp;
944
945 switch (var->bits_per_pixel) {
946 case 16:
947 var->red.length = 5;
948 var->red.offset = 11;
949 var->red.msb_right = 0;
950
951 var->green.length = 6;
952 var->green.offset = 5;
953 var->green.msb_right = 0;
954
955 var->blue.length = 5;
956 var->blue.offset = 0;
957 var->blue.msb_right = 0;
958
959 var->transp.length = 0;
960 var->transp.offset = 0;
961 var->transp.msb_right = 0;
962 break;
963 case 24:
964 var->red.length = 8;
965 var->red.offset = 16;
966 var->red.msb_right = 0;
967
968 var->green.length = 8;
969 var->green.offset = 8;
970 var->green.msb_right = 0;
971
972 var->blue.length = 8;
973 var->blue.offset = 0;
974 var->blue.msb_right = 0;
975
976 var->transp.length = 0;
977 var->transp.offset = 0;
978 var->transp.msb_right = 0;
979 break;
980 case 32:
981 var->red.length = 8;
982 var->red.offset = 16;
983 var->red.msb_right = 0;
984
985 var->green.length = 8;
986 var->green.offset = 8;
987 var->green.msb_right = 0;
988
989 var->blue.length = 8;
990 var->blue.offset = 0;
991 var->blue.msb_right = 0;
992
993 var->transp.length = 8;
994 var->transp.offset = 24;
995 var->transp.msb_right = 0;
996 break;
997 }
998
999 if (var->pixclock < 1000) {
1000 htotal = var->xres + var->right_margin + var->hsync_len +
1001 var->left_margin;
1002 vtotal = var->yres + var->lower_margin + var->vsync_len +
1003 var->upper_margin;
1004 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
1005 var->pixclock = KHZ2PICOS(var->pixclock);
1006 dev_dbg(fbi->device, "pixclock set for 60Hz refresh = %u ps\n",
1007 var->pixclock);
1008 }
1009
1010 var->height = -1;
1011 var->width = -1;
1012 var->grayscale = 0;
1013
1014 /* Preserve sync flags */
1015 var->sync |= mx3_fbi->cur_var.sync;
1016 mx3_fbi->cur_var.sync |= var->sync;
1017
1018 return 0;
1019 }
1020
1021 static u32 chan_to_field(unsigned int chan, struct fb_bitfield *bf)
1022 {
1023 chan &= 0xffff;
1024 chan >>= 16 - bf->length;
1025 return chan << bf->offset;
1026 }
1027
1028 static int mx3fb_setcolreg(unsigned int regno, unsigned int red,
1029 unsigned int green, unsigned int blue,
1030 unsigned int trans, struct fb_info *fbi)
1031 {
1032 struct mx3fb_info *mx3_fbi = fbi->par;
1033 u32 val;
1034 int ret = 1;
1035
1036 dev_dbg(fbi->device, "%s, regno = %u\n", __func__, regno);
1037
1038 mutex_lock(&mx3_fbi->mutex);
1039 /*
1040 * If greyscale is true, then we convert the RGB value
1041 * to greyscale no matter what visual we are using.
1042 */
1043 if (fbi->var.grayscale)
1044 red = green = blue = (19595 * red + 38470 * green +
1045 7471 * blue) >> 16;
1046 switch (fbi->fix.visual) {
1047 case FB_VISUAL_TRUECOLOR:
1048 /*
1049 * 16-bit True Colour. We encode the RGB value
1050 * according to the RGB bitfield information.
1051 */
1052 if (regno < 16) {
1053 u32 *pal = fbi->pseudo_palette;
1054
1055 val = chan_to_field(red, &fbi->var.red);
1056 val |= chan_to_field(green, &fbi->var.green);
1057 val |= chan_to_field(blue, &fbi->var.blue);
1058
1059 pal[regno] = val;
1060
1061 ret = 0;
1062 }
1063 break;
1064
1065 case FB_VISUAL_STATIC_PSEUDOCOLOR:
1066 case FB_VISUAL_PSEUDOCOLOR:
1067 break;
1068 }
1069 mutex_unlock(&mx3_fbi->mutex);
1070
1071 return ret;
1072 }
1073
1074 static void __blank(int blank, struct fb_info *fbi)
1075 {
1076 struct mx3fb_info *mx3_fbi = fbi->par;
1077 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
1078 int was_blank = mx3_fbi->blank;
1079
1080 mx3_fbi->blank = blank;
1081
1082 /* Attention!
1083 * Do not call sdc_disable_channel() for a channel that is disabled
1084 * already! This will result in a kernel NULL pointer dereference
1085 * (mx3_fbi->txd is NULL). Hide the fact, that all blank modes are
1086 * handled equally by this driver.
1087 */
1088 if (blank > FB_BLANK_UNBLANK && was_blank > FB_BLANK_UNBLANK)
1089 return;
1090
1091 switch (blank) {
1092 case FB_BLANK_POWERDOWN:
1093 case FB_BLANK_VSYNC_SUSPEND:
1094 case FB_BLANK_HSYNC_SUSPEND:
1095 case FB_BLANK_NORMAL:
1096 sdc_set_brightness(mx3fb, 0);
1097 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
1098 /* Give LCD time to update - enough for 50 and 60 Hz */
1099 msleep(25);
1100 sdc_disable_channel(mx3_fbi);
1101 break;
1102 case FB_BLANK_UNBLANK:
1103 sdc_enable_channel(mx3_fbi);
1104 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1105 break;
1106 }
1107 }
1108
1109 /**
1110 * mx3fb_blank() - blank the display.
1111 */
1112 static int mx3fb_blank(int blank, struct fb_info *fbi)
1113 {
1114 struct mx3fb_info *mx3_fbi = fbi->par;
1115
1116 dev_dbg(fbi->device, "%s, blank = %d, base %p, len %u\n", __func__,
1117 blank, fbi->screen_base, fbi->fix.smem_len);
1118
1119 if (mx3_fbi->blank == blank)
1120 return 0;
1121
1122 mutex_lock(&mx3_fbi->mutex);
1123 __blank(blank, fbi);
1124 mutex_unlock(&mx3_fbi->mutex);
1125
1126 return 0;
1127 }
1128
1129 /**
1130 * mx3fb_pan_display() - pan or wrap the display
1131 * @var: variable screen buffer information.
1132 * @info: framebuffer information pointer.
1133 *
1134 * We look only at xoffset, yoffset and the FB_VMODE_YWRAP flag
1135 */
1136 static int mx3fb_pan_display(struct fb_var_screeninfo *var,
1137 struct fb_info *fbi)
1138 {
1139 struct mx3fb_info *mx3_fbi = fbi->par;
1140 u32 y_bottom;
1141 unsigned long base;
1142 off_t offset;
1143 dma_cookie_t cookie;
1144 struct scatterlist *sg = mx3_fbi->sg;
1145 struct dma_chan *dma_chan = &mx3_fbi->idmac_channel->dma_chan;
1146 struct dma_async_tx_descriptor *txd;
1147 int ret;
1148
1149 dev_dbg(fbi->device, "%s [%c]\n", __func__,
1150 list_empty(&mx3_fbi->idmac_channel->queue) ? '-' : '+');
1151
1152 if (var->xoffset > 0) {
1153 dev_dbg(fbi->device, "x panning not supported\n");
1154 return -EINVAL;
1155 }
1156
1157 if (mx3_fbi->cur_var.xoffset == var->xoffset &&
1158 mx3_fbi->cur_var.yoffset == var->yoffset)
1159 return 0; /* No change, do nothing */
1160
1161 y_bottom = var->yoffset;
1162
1163 if (!(var->vmode & FB_VMODE_YWRAP))
1164 y_bottom += fbi->var.yres;
1165
1166 if (y_bottom > fbi->var.yres_virtual)
1167 return -EINVAL;
1168
1169 mutex_lock(&mx3_fbi->mutex);
1170
1171 offset = var->yoffset * fbi->fix.line_length
1172 + var->xoffset * (fbi->var.bits_per_pixel / 8);
1173 base = fbi->fix.smem_start + offset;
1174
1175 dev_dbg(fbi->device, "Updating SDC BG buf %d address=0x%08lX\n",
1176 mx3_fbi->cur_ipu_buf, base);
1177
1178 /*
1179 * We enable the End of Frame interrupt, which will free a tx-descriptor,
1180 * which we will need for the next dmaengine_prep_slave_sg(). The
1181 * IRQ-handler will disable the IRQ again.
1182 */
1183 init_completion(&mx3_fbi->flip_cmpl);
1184 enable_irq(mx3_fbi->idmac_channel->eof_irq);
1185
1186 ret = wait_for_completion_timeout(&mx3_fbi->flip_cmpl, HZ / 10);
1187 if (ret <= 0) {
1188 mutex_unlock(&mx3_fbi->mutex);
1189 dev_info(fbi->device, "Panning failed due to %s\n", ret < 0 ?
1190 "user interrupt" : "timeout");
1191 disable_irq(mx3_fbi->idmac_channel->eof_irq);
1192 return ret ? : -ETIMEDOUT;
1193 }
1194
1195 mx3_fbi->cur_ipu_buf = !mx3_fbi->cur_ipu_buf;
1196
1197 sg_dma_address(&sg[mx3_fbi->cur_ipu_buf]) = base;
1198 sg_set_page(&sg[mx3_fbi->cur_ipu_buf],
1199 virt_to_page(fbi->screen_base + offset), fbi->fix.smem_len,
1200 offset_in_page(fbi->screen_base + offset));
1201
1202 if (mx3_fbi->txd)
1203 async_tx_ack(mx3_fbi->txd);
1204
1205 txd = dmaengine_prep_slave_sg(dma_chan, sg +
1206 mx3_fbi->cur_ipu_buf, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
1207 if (!txd) {
1208 dev_err(fbi->device,
1209 "Error preparing a DMA transaction descriptor.\n");
1210 mutex_unlock(&mx3_fbi->mutex);
1211 return -EIO;
1212 }
1213
1214 txd->callback_param = txd;
1215 txd->callback = mx3fb_dma_done;
1216
1217 /*
1218 * Emulate original mx3fb behaviour: each new call to idmac_tx_submit()
1219 * should switch to another buffer
1220 */
1221 cookie = txd->tx_submit(txd);
1222 dev_dbg(fbi->device, "%d: Submit %p #%d\n", __LINE__, txd, cookie);
1223 if (cookie < 0) {
1224 dev_err(fbi->device,
1225 "Error updating SDC buf %d to address=0x%08lX\n",
1226 mx3_fbi->cur_ipu_buf, base);
1227 mutex_unlock(&mx3_fbi->mutex);
1228 return -EIO;
1229 }
1230
1231 mx3_fbi->txd = txd;
1232
1233 fbi->var.xoffset = var->xoffset;
1234 fbi->var.yoffset = var->yoffset;
1235
1236 if (var->vmode & FB_VMODE_YWRAP)
1237 fbi->var.vmode |= FB_VMODE_YWRAP;
1238 else
1239 fbi->var.vmode &= ~FB_VMODE_YWRAP;
1240
1241 mx3_fbi->cur_var = fbi->var;
1242
1243 mutex_unlock(&mx3_fbi->mutex);
1244
1245 dev_dbg(fbi->device, "Update complete\n");
1246
1247 return 0;
1248 }
1249
1250 /*
1251 * This structure contains the pointers to the control functions that are
1252 * invoked by the core framebuffer driver to perform operations like
1253 * blitting, rectangle filling, copy regions and cursor definition.
1254 */
1255 static struct fb_ops mx3fb_ops = {
1256 .owner = THIS_MODULE,
1257 .fb_set_par = mx3fb_set_par,
1258 .fb_check_var = mx3fb_check_var,
1259 .fb_setcolreg = mx3fb_setcolreg,
1260 .fb_pan_display = mx3fb_pan_display,
1261 .fb_fillrect = cfb_fillrect,
1262 .fb_copyarea = cfb_copyarea,
1263 .fb_imageblit = cfb_imageblit,
1264 .fb_blank = mx3fb_blank,
1265 };
1266
1267 #ifdef CONFIG_PM
1268 /*
1269 * Power management hooks. Note that we won't be called from IRQ context,
1270 * unlike the blank functions above, so we may sleep.
1271 */
1272
1273 /*
1274 * Suspends the framebuffer and blanks the screen. Power management support
1275 */
1276 static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state)
1277 {
1278 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1279 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1280
1281 console_lock();
1282 fb_set_suspend(mx3fb->fbi, 1);
1283 console_unlock();
1284
1285 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1286 sdc_disable_channel(mx3_fbi);
1287 sdc_set_brightness(mx3fb, 0);
1288
1289 }
1290 return 0;
1291 }
1292
1293 /*
1294 * Resumes the framebuffer and unblanks the screen. Power management support
1295 */
1296 static int mx3fb_resume(struct platform_device *pdev)
1297 {
1298 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1299 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1300
1301 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1302 sdc_enable_channel(mx3_fbi);
1303 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1304 }
1305
1306 console_lock();
1307 fb_set_suspend(mx3fb->fbi, 0);
1308 console_unlock();
1309
1310 return 0;
1311 }
1312 #else
1313 #define mx3fb_suspend NULL
1314 #define mx3fb_resume NULL
1315 #endif
1316
1317 /*
1318 * Main framebuffer functions
1319 */
1320
1321 /**
1322 * mx3fb_map_video_memory() - allocates the DRAM memory for the frame buffer.
1323 * @fbi: framebuffer information pointer
1324 * @mem_len: length of mapped memory
1325 * @lock: do not lock during initialisation
1326 * @return: Error code indicating success or failure
1327 *
1328 * This buffer is remapped into a non-cached, non-buffered, memory region to
1329 * allow palette and pixel writes to occur without flushing the cache. Once this
1330 * area is remapped, all virtual memory access to the video memory should occur
1331 * at the new region.
1332 */
1333 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
1334 bool lock)
1335 {
1336 int retval = 0;
1337 dma_addr_t addr;
1338
1339 fbi->screen_base = dma_alloc_wc(fbi->device, mem_len, &addr,
1340 GFP_DMA | GFP_KERNEL);
1341
1342 if (!fbi->screen_base) {
1343 dev_err(fbi->device, "Cannot allocate %u bytes framebuffer memory\n",
1344 mem_len);
1345 retval = -EBUSY;
1346 goto err0;
1347 }
1348
1349 if (lock)
1350 mutex_lock(&fbi->mm_lock);
1351 fbi->fix.smem_start = addr;
1352 fbi->fix.smem_len = mem_len;
1353 if (lock)
1354 mutex_unlock(&fbi->mm_lock);
1355
1356 dev_dbg(fbi->device, "allocated fb @ p=0x%08x, v=0x%p, size=%d.\n",
1357 (uint32_t) fbi->fix.smem_start, fbi->screen_base, fbi->fix.smem_len);
1358
1359 fbi->screen_size = fbi->fix.smem_len;
1360
1361 /* Clear the screen */
1362 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
1363
1364 return 0;
1365
1366 err0:
1367 fbi->fix.smem_len = 0;
1368 fbi->fix.smem_start = 0;
1369 fbi->screen_base = NULL;
1370 return retval;
1371 }
1372
1373 /**
1374 * mx3fb_unmap_video_memory() - de-allocate frame buffer memory.
1375 * @fbi: framebuffer information pointer
1376 * @return: error code indicating success or failure
1377 */
1378 static int mx3fb_unmap_video_memory(struct fb_info *fbi)
1379 {
1380 dma_free_wc(fbi->device, fbi->fix.smem_len, fbi->screen_base,
1381 fbi->fix.smem_start);
1382
1383 fbi->screen_base = NULL;
1384 mutex_lock(&fbi->mm_lock);
1385 fbi->fix.smem_start = 0;
1386 fbi->fix.smem_len = 0;
1387 mutex_unlock(&fbi->mm_lock);
1388 return 0;
1389 }
1390
1391 /**
1392 * mx3fb_init_fbinfo() - initialize framebuffer information object.
1393 * @return: initialized framebuffer structure.
1394 */
1395 static struct fb_info *mx3fb_init_fbinfo(struct device *dev, struct fb_ops *ops)
1396 {
1397 struct fb_info *fbi;
1398 struct mx3fb_info *mx3fbi;
1399 int ret;
1400
1401 /* Allocate sufficient memory for the fb structure */
1402 fbi = framebuffer_alloc(sizeof(struct mx3fb_info), dev);
1403 if (!fbi)
1404 return NULL;
1405
1406 mx3fbi = fbi->par;
1407 mx3fbi->cookie = -EINVAL;
1408 mx3fbi->cur_ipu_buf = 0;
1409
1410 fbi->var.activate = FB_ACTIVATE_NOW;
1411
1412 fbi->fbops = ops;
1413 fbi->flags = FBINFO_FLAG_DEFAULT;
1414 fbi->pseudo_palette = mx3fbi->pseudo_palette;
1415
1416 mutex_init(&mx3fbi->mutex);
1417
1418 /* Allocate colormap */
1419 ret = fb_alloc_cmap(&fbi->cmap, 16, 0);
1420 if (ret < 0) {
1421 framebuffer_release(fbi);
1422 return NULL;
1423 }
1424
1425 return fbi;
1426 }
1427
1428 static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan)
1429 {
1430 struct device *dev = mx3fb->dev;
1431 struct mx3fb_platform_data *mx3fb_pdata = dev_get_platdata(dev);
1432 const char *name = mx3fb_pdata->name;
1433 unsigned int irq;
1434 struct fb_info *fbi;
1435 struct mx3fb_info *mx3fbi;
1436 const struct fb_videomode *mode;
1437 int ret, num_modes;
1438
1439 if (mx3fb_pdata->disp_data_fmt >= ARRAY_SIZE(di_mappings)) {
1440 dev_err(dev, "Illegal display data format %d\n",
1441 mx3fb_pdata->disp_data_fmt);
1442 return -EINVAL;
1443 }
1444
1445 ichan->client = mx3fb;
1446 irq = ichan->eof_irq;
1447
1448 if (ichan->dma_chan.chan_id != IDMAC_SDC_0)
1449 return -EINVAL;
1450
1451 fbi = mx3fb_init_fbinfo(dev, &mx3fb_ops);
1452 if (!fbi)
1453 return -ENOMEM;
1454
1455 if (!fb_mode)
1456 fb_mode = name;
1457
1458 if (!fb_mode) {
1459 ret = -EINVAL;
1460 goto emode;
1461 }
1462
1463 if (mx3fb_pdata->mode && mx3fb_pdata->num_modes) {
1464 mode = mx3fb_pdata->mode;
1465 num_modes = mx3fb_pdata->num_modes;
1466 } else {
1467 mode = mx3fb_modedb;
1468 num_modes = ARRAY_SIZE(mx3fb_modedb);
1469 }
1470
1471 if (!fb_find_mode(&fbi->var, fbi, fb_mode, mode,
1472 num_modes, NULL, default_bpp)) {
1473 ret = -EBUSY;
1474 goto emode;
1475 }
1476
1477 fb_videomode_to_modelist(mode, num_modes, &fbi->modelist);
1478
1479 /* Default Y virtual size is 2x panel size */
1480 fbi->var.yres_virtual = fbi->var.yres * 2;
1481
1482 mx3fb->fbi = fbi;
1483
1484 /* set Display Interface clock period */
1485 mx3fb_write_reg(mx3fb, 0x00100010L, DI_HSP_CLK_PER);
1486 /* Might need to trigger HSP clock change - see 44.3.3.8.5 */
1487
1488 sdc_set_brightness(mx3fb, 255);
1489 sdc_set_global_alpha(mx3fb, true, 0xFF);
1490 sdc_set_color_key(mx3fb, IDMAC_SDC_0, false, 0);
1491
1492 mx3fbi = fbi->par;
1493 mx3fbi->idmac_channel = ichan;
1494 mx3fbi->ipu_ch = ichan->dma_chan.chan_id;
1495 mx3fbi->mx3fb = mx3fb;
1496 mx3fbi->blank = FB_BLANK_NORMAL;
1497
1498 mx3fb->disp_data_fmt = mx3fb_pdata->disp_data_fmt;
1499
1500 init_completion(&mx3fbi->flip_cmpl);
1501 disable_irq(ichan->eof_irq);
1502 dev_dbg(mx3fb->dev, "disabling irq %d\n", ichan->eof_irq);
1503 ret = __set_par(fbi, false);
1504 if (ret < 0)
1505 goto esetpar;
1506
1507 __blank(FB_BLANK_UNBLANK, fbi);
1508
1509 dev_info(dev, "registered, using mode %s\n", fb_mode);
1510
1511 ret = register_framebuffer(fbi);
1512 if (ret < 0)
1513 goto erfb;
1514
1515 return 0;
1516
1517 erfb:
1518 esetpar:
1519 emode:
1520 fb_dealloc_cmap(&fbi->cmap);
1521 framebuffer_release(fbi);
1522
1523 return ret;
1524 }
1525
1526 static bool chan_filter(struct dma_chan *chan, void *arg)
1527 {
1528 struct dma_chan_request *rq = arg;
1529 struct device *dev;
1530 struct mx3fb_platform_data *mx3fb_pdata;
1531
1532 if (!imx_dma_is_ipu(chan))
1533 return false;
1534
1535 if (!rq)
1536 return false;
1537
1538 dev = rq->mx3fb->dev;
1539 mx3fb_pdata = dev_get_platdata(dev);
1540
1541 return rq->id == chan->chan_id &&
1542 mx3fb_pdata->dma_dev == chan->device->dev;
1543 }
1544
1545 static void release_fbi(struct fb_info *fbi)
1546 {
1547 mx3fb_unmap_video_memory(fbi);
1548
1549 fb_dealloc_cmap(&fbi->cmap);
1550
1551 unregister_framebuffer(fbi);
1552 framebuffer_release(fbi);
1553 }
1554
1555 static int mx3fb_probe(struct platform_device *pdev)
1556 {
1557 struct device *dev = &pdev->dev;
1558 int ret;
1559 struct resource *sdc_reg;
1560 struct mx3fb_data *mx3fb;
1561 dma_cap_mask_t mask;
1562 struct dma_chan *chan;
1563 struct dma_chan_request rq;
1564
1565 /*
1566 * Display Interface (DI) and Synchronous Display Controller (SDC)
1567 * registers
1568 */
1569 sdc_reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1570 if (!sdc_reg)
1571 return -EINVAL;
1572
1573 mx3fb = devm_kzalloc(&pdev->dev, sizeof(*mx3fb), GFP_KERNEL);
1574 if (!mx3fb)
1575 return -ENOMEM;
1576
1577 spin_lock_init(&mx3fb->lock);
1578
1579 mx3fb->reg_base = ioremap(sdc_reg->start, resource_size(sdc_reg));
1580 if (!mx3fb->reg_base) {
1581 ret = -ENOMEM;
1582 goto eremap;
1583 }
1584
1585 pr_debug("Remapped %pR at %p\n", sdc_reg, mx3fb->reg_base);
1586
1587 /* IDMAC interface */
1588 dmaengine_get();
1589
1590 mx3fb->dev = dev;
1591 platform_set_drvdata(pdev, mx3fb);
1592
1593 rq.mx3fb = mx3fb;
1594
1595 dma_cap_zero(mask);
1596 dma_cap_set(DMA_SLAVE, mask);
1597 dma_cap_set(DMA_PRIVATE, mask);
1598 rq.id = IDMAC_SDC_0;
1599 chan = dma_request_channel(mask, chan_filter, &rq);
1600 if (!chan) {
1601 ret = -EBUSY;
1602 goto ersdc0;
1603 }
1604
1605 mx3fb->backlight_level = 255;
1606
1607 ret = init_fb_chan(mx3fb, to_idmac_chan(chan));
1608 if (ret < 0)
1609 goto eisdc0;
1610
1611 mx3fb_init_backlight(mx3fb);
1612
1613 return 0;
1614
1615 eisdc0:
1616 dma_release_channel(chan);
1617 ersdc0:
1618 dmaengine_put();
1619 iounmap(mx3fb->reg_base);
1620 eremap:
1621 dev_err(dev, "mx3fb: failed to register fb\n");
1622 return ret;
1623 }
1624
1625 static int mx3fb_remove(struct platform_device *dev)
1626 {
1627 struct mx3fb_data *mx3fb = platform_get_drvdata(dev);
1628 struct fb_info *fbi = mx3fb->fbi;
1629 struct mx3fb_info *mx3_fbi = fbi->par;
1630 struct dma_chan *chan;
1631
1632 chan = &mx3_fbi->idmac_channel->dma_chan;
1633 release_fbi(fbi);
1634
1635 mx3fb_exit_backlight(mx3fb);
1636
1637 dma_release_channel(chan);
1638 dmaengine_put();
1639
1640 iounmap(mx3fb->reg_base);
1641 return 0;
1642 }
1643
1644 static struct platform_driver mx3fb_driver = {
1645 .driver = {
1646 .name = MX3FB_NAME,
1647 },
1648 .probe = mx3fb_probe,
1649 .remove = mx3fb_remove,
1650 .suspend = mx3fb_suspend,
1651 .resume = mx3fb_resume,
1652 };
1653
1654 /*
1655 * Parse user specified options (`video=mx3fb:')
1656 * example:
1657 * video=mx3fb:bpp=16
1658 */
1659 static int __init mx3fb_setup(void)
1660 {
1661 #ifndef MODULE
1662 char *opt, *options = NULL;
1663
1664 if (fb_get_options("mx3fb", &options))
1665 return -ENODEV;
1666
1667 if (!options || !*options)
1668 return 0;
1669
1670 while ((opt = strsep(&options, ",")) != NULL) {
1671 if (!*opt)
1672 continue;
1673 if (!strncmp(opt, "bpp=", 4))
1674 default_bpp = simple_strtoul(opt + 4, NULL, 0);
1675 else
1676 fb_mode = opt;
1677 }
1678 #endif
1679
1680 return 0;
1681 }
1682
1683 static int __init mx3fb_init(void)
1684 {
1685 int ret = mx3fb_setup();
1686
1687 if (ret < 0)
1688 return ret;
1689
1690 ret = platform_driver_register(&mx3fb_driver);
1691 return ret;
1692 }
1693
1694 static void __exit mx3fb_exit(void)
1695 {
1696 platform_driver_unregister(&mx3fb_driver);
1697 }
1698
1699 module_init(mx3fb_init);
1700 module_exit(mx3fb_exit);
1701
1702 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1703 MODULE_DESCRIPTION("MX3 framebuffer driver");
1704 MODULE_ALIAS("platform:" MX3FB_NAME);
1705 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support