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ptrace/x86: revert "hw_breakpoints: Fix racy access to ptrace breakpoints"
[linux-2.6.git] / drivers / video / mx3fb.c
blobcfdb380ec81ea9943c98a26411c18bfe4c0d3c18
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
31 #include <linux/platform_data/dma-imx.h>
32 #include <linux/platform_data/video-mx3fb.h>
33
34 #include <asm/io.h>
35 #include <asm/uaccess.h>
36
37 #define MX3FB_NAME "mx3_sdc_fb"
38
39 #define MX3FB_REG_OFFSET 0xB4
40
41 /* SDC Registers */
42 #define SDC_COM_CONF (0xB4 - MX3FB_REG_OFFSET)
43 #define SDC_GW_CTRL (0xB8 - MX3FB_REG_OFFSET)
44 #define SDC_FG_POS (0xBC - MX3FB_REG_OFFSET)
45 #define SDC_BG_POS (0xC0 - MX3FB_REG_OFFSET)
46 #define SDC_CUR_POS (0xC4 - MX3FB_REG_OFFSET)
47 #define SDC_PWM_CTRL (0xC8 - MX3FB_REG_OFFSET)
48 #define SDC_CUR_MAP (0xCC - MX3FB_REG_OFFSET)
49 #define SDC_HOR_CONF (0xD0 - MX3FB_REG_OFFSET)
50 #define SDC_VER_CONF (0xD4 - MX3FB_REG_OFFSET)
51 #define SDC_SHARP_CONF_1 (0xD8 - MX3FB_REG_OFFSET)
52 #define SDC_SHARP_CONF_2 (0xDC - MX3FB_REG_OFFSET)
53
54 /* Register bits */
55 #define SDC_COM_TFT_COLOR 0x00000001UL
56 #define SDC_COM_FG_EN 0x00000010UL
57 #define SDC_COM_GWSEL 0x00000020UL
58 #define SDC_COM_GLB_A 0x00000040UL
59 #define SDC_COM_KEY_COLOR_G 0x00000080UL
60 #define SDC_COM_BG_EN 0x00000200UL
61 #define SDC_COM_SHARP 0x00001000UL
62
63 #define SDC_V_SYNC_WIDTH_L 0x00000001UL
64
65 /* Display Interface registers */
66 #define DI_DISP_IF_CONF (0x0124 - MX3FB_REG_OFFSET)
67 #define DI_DISP_SIG_POL (0x0128 - MX3FB_REG_OFFSET)
68 #define DI_SER_DISP1_CONF (0x012C - MX3FB_REG_OFFSET)
69 #define DI_SER_DISP2_CONF (0x0130 - MX3FB_REG_OFFSET)
70 #define DI_HSP_CLK_PER (0x0134 - MX3FB_REG_OFFSET)
71 #define DI_DISP0_TIME_CONF_1 (0x0138 - MX3FB_REG_OFFSET)
72 #define DI_DISP0_TIME_CONF_2 (0x013C - MX3FB_REG_OFFSET)
73 #define DI_DISP0_TIME_CONF_3 (0x0140 - MX3FB_REG_OFFSET)
74 #define DI_DISP1_TIME_CONF_1 (0x0144 - MX3FB_REG_OFFSET)
75 #define DI_DISP1_TIME_CONF_2 (0x0148 - MX3FB_REG_OFFSET)
76 #define DI_DISP1_TIME_CONF_3 (0x014C - MX3FB_REG_OFFSET)
77 #define DI_DISP2_TIME_CONF_1 (0x0150 - MX3FB_REG_OFFSET)
78 #define DI_DISP2_TIME_CONF_2 (0x0154 - MX3FB_REG_OFFSET)
79 #define DI_DISP2_TIME_CONF_3 (0x0158 - MX3FB_REG_OFFSET)
80 #define DI_DISP3_TIME_CONF (0x015C - MX3FB_REG_OFFSET)
81 #define DI_DISP0_DB0_MAP (0x0160 - MX3FB_REG_OFFSET)
82 #define DI_DISP0_DB1_MAP (0x0164 - MX3FB_REG_OFFSET)
83 #define DI_DISP0_DB2_MAP (0x0168 - MX3FB_REG_OFFSET)
84 #define DI_DISP0_CB0_MAP (0x016C - MX3FB_REG_OFFSET)
85 #define DI_DISP0_CB1_MAP (0x0170 - MX3FB_REG_OFFSET)
86 #define DI_DISP0_CB2_MAP (0x0174 - MX3FB_REG_OFFSET)
87 #define DI_DISP1_DB0_MAP (0x0178 - MX3FB_REG_OFFSET)
88 #define DI_DISP1_DB1_MAP (0x017C - MX3FB_REG_OFFSET)
89 #define DI_DISP1_DB2_MAP (0x0180 - MX3FB_REG_OFFSET)
90 #define DI_DISP1_CB0_MAP (0x0184 - MX3FB_REG_OFFSET)
91 #define DI_DISP1_CB1_MAP (0x0188 - MX3FB_REG_OFFSET)
92 #define DI_DISP1_CB2_MAP (0x018C - MX3FB_REG_OFFSET)
93 #define DI_DISP2_DB0_MAP (0x0190 - MX3FB_REG_OFFSET)
94 #define DI_DISP2_DB1_MAP (0x0194 - MX3FB_REG_OFFSET)
95 #define DI_DISP2_DB2_MAP (0x0198 - MX3FB_REG_OFFSET)
96 #define DI_DISP2_CB0_MAP (0x019C - MX3FB_REG_OFFSET)
97 #define DI_DISP2_CB1_MAP (0x01A0 - MX3FB_REG_OFFSET)
98 #define DI_DISP2_CB2_MAP (0x01A4 - MX3FB_REG_OFFSET)
99 #define DI_DISP3_B0_MAP (0x01A8 - MX3FB_REG_OFFSET)
100 #define DI_DISP3_B1_MAP (0x01AC - MX3FB_REG_OFFSET)
101 #define DI_DISP3_B2_MAP (0x01B0 - MX3FB_REG_OFFSET)
102 #define DI_DISP_ACC_CC (0x01B4 - MX3FB_REG_OFFSET)
103 #define DI_DISP_LLA_CONF (0x01B8 - MX3FB_REG_OFFSET)
104 #define DI_DISP_LLA_DATA (0x01BC - MX3FB_REG_OFFSET)
105
106 /* DI_DISP_SIG_POL bits */
107 #define DI_D3_VSYNC_POL_SHIFT 28
108 #define DI_D3_HSYNC_POL_SHIFT 27
109 #define DI_D3_DRDY_SHARP_POL_SHIFT 26
110 #define DI_D3_CLK_POL_SHIFT 25
111 #define DI_D3_DATA_POL_SHIFT 24
112
113 /* DI_DISP_IF_CONF bits */
114 #define DI_D3_CLK_IDLE_SHIFT 26
115 #define DI_D3_CLK_SEL_SHIFT 25
116 #define DI_D3_DATAMSK_SHIFT 24
117
118 enum ipu_panel {
119 IPU_PANEL_SHARP_TFT,
120 IPU_PANEL_TFT,
121 };
122
123 struct ipu_di_signal_cfg {
124 unsigned datamask_en:1;
125 unsigned clksel_en:1;
126 unsigned clkidle_en:1;
127 unsigned data_pol:1; /* true = inverted */
128 unsigned clk_pol:1; /* true = rising edge */
129 unsigned enable_pol:1;
130 unsigned Hsync_pol:1; /* true = active high */
131 unsigned Vsync_pol:1;
132 };
133
134 static const struct fb_videomode mx3fb_modedb[] = {
135 {
136 /* 240x320 @ 60 Hz */
137 .name = "Sharp-QVGA",
138 .refresh = 60,
139 .xres = 240,
140 .yres = 320,
141 .pixclock = 185925,
142 .left_margin = 9,
143 .right_margin = 16,
144 .upper_margin = 7,
145 .lower_margin = 9,
146 .hsync_len = 1,
147 .vsync_len = 1,
148 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
149 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
150 FB_SYNC_CLK_IDLE_EN,
151 .vmode = FB_VMODE_NONINTERLACED,
152 .flag = 0,
153 }, {
154 /* 240x33 @ 60 Hz */
155 .name = "Sharp-CLI",
156 .refresh = 60,
157 .xres = 240,
158 .yres = 33,
159 .pixclock = 185925,
160 .left_margin = 9,
161 .right_margin = 16,
162 .upper_margin = 7,
163 .lower_margin = 9 + 287,
164 .hsync_len = 1,
165 .vsync_len = 1,
166 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
167 FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
168 FB_SYNC_CLK_IDLE_EN,
169 .vmode = FB_VMODE_NONINTERLACED,
170 .flag = 0,
171 }, {
172 /* 640x480 @ 60 Hz */
173 .name = "NEC-VGA",
174 .refresh = 60,
175 .xres = 640,
176 .yres = 480,
177 .pixclock = 38255,
178 .left_margin = 144,
179 .right_margin = 0,
180 .upper_margin = 34,
181 .lower_margin = 40,
182 .hsync_len = 1,
183 .vsync_len = 1,
184 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_OE_ACT_HIGH,
185 .vmode = FB_VMODE_NONINTERLACED,
186 .flag = 0,
187 }, {
188 /* NTSC TV output */
189 .name = "TV-NTSC",
190 .refresh = 60,
191 .xres = 640,
192 .yres = 480,
193 .pixclock = 37538,
194 .left_margin = 38,
195 .right_margin = 858 - 640 - 38 - 3,
196 .upper_margin = 36,
197 .lower_margin = 518 - 480 - 36 - 1,
198 .hsync_len = 3,
199 .vsync_len = 1,
200 .sync = 0,
201 .vmode = FB_VMODE_NONINTERLACED,
202 .flag = 0,
203 }, {
204 /* PAL TV output */
205 .name = "TV-PAL",
206 .refresh = 50,
207 .xres = 640,
208 .yres = 480,
209 .pixclock = 37538,
210 .left_margin = 38,
211 .right_margin = 960 - 640 - 38 - 32,
212 .upper_margin = 32,
213 .lower_margin = 555 - 480 - 32 - 3,
214 .hsync_len = 32,
215 .vsync_len = 3,
216 .sync = 0,
217 .vmode = FB_VMODE_NONINTERLACED,
218 .flag = 0,
219 }, {
220 /* TV output VGA mode, 640x480 @ 65 Hz */
221 .name = "TV-VGA",
222 .refresh = 60,
223 .xres = 640,
224 .yres = 480,
225 .pixclock = 40574,
226 .left_margin = 35,
227 .right_margin = 45,
228 .upper_margin = 9,
229 .lower_margin = 1,
230 .hsync_len = 46,
231 .vsync_len = 5,
232 .sync = 0,
233 .vmode = FB_VMODE_NONINTERLACED,
234 .flag = 0,
235 },
236 };
237
238 struct mx3fb_data {
239 struct fb_info *fbi;
240 int backlight_level;
241 void __iomem *reg_base;
242 spinlock_t lock;
243 struct device *dev;
244
245 uint32_t h_start_width;
246 uint32_t v_start_width;
247 enum disp_data_mapping disp_data_fmt;
248 };
249
250 struct dma_chan_request {
251 struct mx3fb_data *mx3fb;
252 enum ipu_channel id;
253 };
254
255 /* MX3 specific framebuffer information. */
256 struct mx3fb_info {
257 int blank;
258 enum ipu_channel ipu_ch;
259 uint32_t cur_ipu_buf;
260
261 u32 pseudo_palette[16];
262
263 struct completion flip_cmpl;
264 struct mutex mutex; /* Protects fb-ops */
265 struct mx3fb_data *mx3fb;
266 struct idmac_channel *idmac_channel;
267 struct dma_async_tx_descriptor *txd;
268 dma_cookie_t cookie;
269 struct scatterlist sg[2];
270
271 struct fb_var_screeninfo cur_var; /* current var info */
272 };
273
274 static void mx3fb_dma_done(void *);
275
276 /* Used fb-mode and bpp. Can be set on kernel command line, therefore file-static. */
277 static const char *fb_mode;
278 static unsigned long default_bpp = 16;
279
280 static u32 mx3fb_read_reg(struct mx3fb_data *mx3fb, unsigned long reg)
281 {
282 return __raw_readl(mx3fb->reg_base + reg);
283 }
284
285 static void mx3fb_write_reg(struct mx3fb_data *mx3fb, u32 value, unsigned long reg)
286 {
287 __raw_writel(value, mx3fb->reg_base + reg);
288 }
289
290 struct di_mapping {
291 uint32_t b0, b1, b2;
292 };
293
294 static const struct di_mapping di_mappings[] = {
295 [IPU_DISP_DATA_MAPPING_RGB666] = { 0x0005000f, 0x000b000f, 0x0011000f },
296 [IPU_DISP_DATA_MAPPING_RGB565] = { 0x0004003f, 0x000a000f, 0x000f003f },
297 [IPU_DISP_DATA_MAPPING_RGB888] = { 0x00070000, 0x000f0000, 0x00170000 },
298 };
299
300 static void sdc_fb_init(struct mx3fb_info *fbi)
301 {
302 struct mx3fb_data *mx3fb = fbi->mx3fb;
303 uint32_t reg;
304
305 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
306
307 mx3fb_write_reg(mx3fb, reg | SDC_COM_BG_EN, SDC_COM_CONF);
308 }
309
310 /* Returns enabled flag before uninit */
311 static uint32_t sdc_fb_uninit(struct mx3fb_info *fbi)
312 {
313 struct mx3fb_data *mx3fb = fbi->mx3fb;
314 uint32_t reg;
315
316 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
317
318 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_BG_EN, SDC_COM_CONF);
319
320 return reg & SDC_COM_BG_EN;
321 }
322
323 static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)
324 {
325 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
326 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
327 struct dma_chan *dma_chan = &ichan->dma_chan;
328 unsigned long flags;
329 dma_cookie_t cookie;
330
331 if (mx3_fbi->txd)
332 dev_dbg(mx3fb->dev, "mx3fbi %p, desc %p, sg %p\n", mx3_fbi,
333 to_tx_desc(mx3_fbi->txd), to_tx_desc(mx3_fbi->txd)->sg);
334 else
335 dev_dbg(mx3fb->dev, "mx3fbi %p, txd = NULL\n", mx3_fbi);
336
337 /* This enables the channel */
338 if (mx3_fbi->cookie < 0) {
339 mx3_fbi->txd = dmaengine_prep_slave_sg(dma_chan,
340 &mx3_fbi->sg[0], 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
341 if (!mx3_fbi->txd) {
342 dev_err(mx3fb->dev, "Cannot allocate descriptor on %d\n",
343 dma_chan->chan_id);
344 return;
345 }
346
347 mx3_fbi->txd->callback_param = mx3_fbi->txd;
348 mx3_fbi->txd->callback = mx3fb_dma_done;
349
350 cookie = mx3_fbi->txd->tx_submit(mx3_fbi->txd);
351 dev_dbg(mx3fb->dev, "%d: Submit %p #%d [%c]\n", __LINE__,
352 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
353 } else {
354 if (!mx3_fbi->txd || !mx3_fbi->txd->tx_submit) {
355 dev_err(mx3fb->dev, "Cannot enable channel %d\n",
356 dma_chan->chan_id);
357 return;
358 }
359
360 /* Just re-activate the same buffer */
361 dma_async_issue_pending(dma_chan);
362 cookie = mx3_fbi->cookie;
363 dev_dbg(mx3fb->dev, "%d: Re-submit %p #%d [%c]\n", __LINE__,
364 mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
365 }
366
367 if (cookie >= 0) {
368 spin_lock_irqsave(&mx3fb->lock, flags);
369 sdc_fb_init(mx3_fbi);
370 mx3_fbi->cookie = cookie;
371 spin_unlock_irqrestore(&mx3fb->lock, flags);
372 }
373
374 /*
375 * Attention! Without this msleep the channel keeps generating
376 * interrupts. Next sdc_set_brightness() is going to be called
377 * from mx3fb_blank().
378 */
379 msleep(2);
380 }
381
382 static void sdc_disable_channel(struct mx3fb_info *mx3_fbi)
383 {
384 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
385 uint32_t enabled;
386 unsigned long flags;
387
388 if (mx3_fbi->txd == NULL)
389 return;
390
391 spin_lock_irqsave(&mx3fb->lock, flags);
392
393 enabled = sdc_fb_uninit(mx3_fbi);
394
395 spin_unlock_irqrestore(&mx3fb->lock, flags);
396
397 mx3_fbi->txd->chan->device->device_control(mx3_fbi->txd->chan,
398 DMA_TERMINATE_ALL, 0);
399 mx3_fbi->txd = NULL;
400 mx3_fbi->cookie = -EINVAL;
401 }
402
403 /**
404 * sdc_set_window_pos() - set window position of the respective plane.
405 * @mx3fb: mx3fb context.
406 * @channel: IPU DMAC channel ID.
407 * @x_pos: X coordinate relative to the top left corner to place window at.
408 * @y_pos: Y coordinate relative to the top left corner to place window at.
409 * @return: 0 on success or negative error code on failure.
410 */
411 static int sdc_set_window_pos(struct mx3fb_data *mx3fb, enum ipu_channel channel,
412 int16_t x_pos, int16_t y_pos)
413 {
414 if (channel != IDMAC_SDC_0)
415 return -EINVAL;
416
417 x_pos += mx3fb->h_start_width;
418 y_pos += mx3fb->v_start_width;
419
420 mx3fb_write_reg(mx3fb, (x_pos << 16) | y_pos, SDC_BG_POS);
421 return 0;
422 }
423
424 /**
425 * sdc_init_panel() - initialize a synchronous LCD panel.
426 * @mx3fb: mx3fb context.
427 * @panel: panel type.
428 * @pixel_clk: desired pixel clock frequency in Hz.
429 * @width: width of panel in pixels.
430 * @height: height of panel in pixels.
431 * @h_start_width: number of pixel clocks between the HSYNC signal pulse
432 * and the start of valid data.
433 * @h_sync_width: width of the HSYNC signal in units of pixel clocks.
434 * @h_end_width: number of pixel clocks between the end of valid data
435 * and the HSYNC signal for next line.
436 * @v_start_width: number of lines between the VSYNC signal pulse and the
437 * start of valid data.
438 * @v_sync_width: width of the VSYNC signal in units of lines
439 * @v_end_width: number of lines between the end of valid data and the
440 * VSYNC signal for next frame.
441 * @sig: bitfield of signal polarities for LCD interface.
442 * @return: 0 on success or negative error code on failure.
443 */
444 static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
445 uint32_t pixel_clk,
446 uint16_t width, uint16_t height,
447 uint16_t h_start_width, uint16_t h_sync_width,
448 uint16_t h_end_width, uint16_t v_start_width,
449 uint16_t v_sync_width, uint16_t v_end_width,
450 struct ipu_di_signal_cfg sig)
451 {
452 unsigned long lock_flags;
453 uint32_t reg;
454 uint32_t old_conf;
455 uint32_t div;
456 struct clk *ipu_clk;
457 const struct di_mapping *map;
458
459 dev_dbg(mx3fb->dev, "panel size = %d x %d", width, height);
460
461 if (v_sync_width == 0 || h_sync_width == 0)
462 return -EINVAL;
463
464 /* Init panel size and blanking periods */
465 reg = ((uint32_t) (h_sync_width - 1) << 26) |
466 ((uint32_t) (width + h_start_width + h_end_width - 1) << 16);
467 mx3fb_write_reg(mx3fb, reg, SDC_HOR_CONF);
468
469 #ifdef DEBUG
470 printk(KERN_CONT " hor_conf %x,", reg);
471 #endif
472
473 reg = ((uint32_t) (v_sync_width - 1) << 26) | SDC_V_SYNC_WIDTH_L |
474 ((uint32_t) (height + v_start_width + v_end_width - 1) << 16);
475 mx3fb_write_reg(mx3fb, reg, SDC_VER_CONF);
476
477 #ifdef DEBUG
478 printk(KERN_CONT " ver_conf %x\n", reg);
479 #endif
480
481 mx3fb->h_start_width = h_start_width;
482 mx3fb->v_start_width = v_start_width;
483
484 switch (panel) {
485 case IPU_PANEL_SHARP_TFT:
486 mx3fb_write_reg(mx3fb, 0x00FD0102L, SDC_SHARP_CONF_1);
487 mx3fb_write_reg(mx3fb, 0x00F500F4L, SDC_SHARP_CONF_2);
488 mx3fb_write_reg(mx3fb, SDC_COM_SHARP | SDC_COM_TFT_COLOR, SDC_COM_CONF);
489 break;
490 case IPU_PANEL_TFT:
491 mx3fb_write_reg(mx3fb, SDC_COM_TFT_COLOR, SDC_COM_CONF);
492 break;
493 default:
494 return -EINVAL;
495 }
496
497 /* Init clocking */
498
499 /*
500 * Calculate divider: fractional part is 4 bits so simply multiple by
501 * 2^4 to get fractional part, as long as we stay under ~250MHz and on
502 * i.MX31 it (HSP_CLK) is <= 178MHz. Currently 128.267MHz
503 */
504 ipu_clk = clk_get(mx3fb->dev, NULL);
505 if (!IS_ERR(ipu_clk)) {
506 div = clk_get_rate(ipu_clk) * 16 / pixel_clk;
507 clk_put(ipu_clk);
508 } else {
509 div = 0;
510 }
511
512 if (div < 0x40) { /* Divider less than 4 */
513 dev_dbg(mx3fb->dev,
514 "InitPanel() - Pixel clock divider less than 4\n");
515 div = 0x40;
516 }
517
518 dev_dbg(mx3fb->dev, "pixel clk = %u, divider %u.%u\n",
519 pixel_clk, div >> 4, (div & 7) * 125);
520
521 spin_lock_irqsave(&mx3fb->lock, lock_flags);
522
523 /*
524 * DISP3_IF_CLK_DOWN_WR is half the divider value and 2 fraction bits
525 * fewer. Subtract 1 extra from DISP3_IF_CLK_DOWN_WR based on timing
526 * debug. DISP3_IF_CLK_UP_WR is 0
527 */
528 mx3fb_write_reg(mx3fb, (((div / 8) - 1) << 22) | div, DI_DISP3_TIME_CONF);
529
530 /* DI settings */
531 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF) & 0x78FFFFFF;
532 old_conf |= sig.datamask_en << DI_D3_DATAMSK_SHIFT |
533 sig.clksel_en << DI_D3_CLK_SEL_SHIFT |
534 sig.clkidle_en << DI_D3_CLK_IDLE_SHIFT;
535 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_IF_CONF);
536
537 old_conf = mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL) & 0xE0FFFFFF;
538 old_conf |= sig.data_pol << DI_D3_DATA_POL_SHIFT |
539 sig.clk_pol << DI_D3_CLK_POL_SHIFT |
540 sig.enable_pol << DI_D3_DRDY_SHARP_POL_SHIFT |
541 sig.Hsync_pol << DI_D3_HSYNC_POL_SHIFT |
542 sig.Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
543 mx3fb_write_reg(mx3fb, old_conf, DI_DISP_SIG_POL);
544
545 map = &di_mappings[mx3fb->disp_data_fmt];
546 mx3fb_write_reg(mx3fb, map->b0, DI_DISP3_B0_MAP);
547 mx3fb_write_reg(mx3fb, map->b1, DI_DISP3_B1_MAP);
548 mx3fb_write_reg(mx3fb, map->b2, DI_DISP3_B2_MAP);
549
550 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
551
552 dev_dbg(mx3fb->dev, "DI_DISP_IF_CONF = 0x%08X\n",
553 mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF));
554 dev_dbg(mx3fb->dev, "DI_DISP_SIG_POL = 0x%08X\n",
555 mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL));
556 dev_dbg(mx3fb->dev, "DI_DISP3_TIME_CONF = 0x%08X\n",
557 mx3fb_read_reg(mx3fb, DI_DISP3_TIME_CONF));
558
559 return 0;
560 }
561
562 /**
563 * sdc_set_color_key() - set the transparent color key for SDC graphic plane.
564 * @mx3fb: mx3fb context.
565 * @channel: IPU DMAC channel ID.
566 * @enable: boolean to enable or disable color keyl.
567 * @color_key: 24-bit RGB color to use as transparent color key.
568 * @return: 0 on success or negative error code on failure.
569 */
570 static int sdc_set_color_key(struct mx3fb_data *mx3fb, enum ipu_channel channel,
571 bool enable, uint32_t color_key)
572 {
573 uint32_t reg, sdc_conf;
574 unsigned long lock_flags;
575
576 spin_lock_irqsave(&mx3fb->lock, lock_flags);
577
578 sdc_conf = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
579 if (channel == IDMAC_SDC_0)
580 sdc_conf &= ~SDC_COM_GWSEL;
581 else
582 sdc_conf |= SDC_COM_GWSEL;
583
584 if (enable) {
585 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0xFF000000L;
586 mx3fb_write_reg(mx3fb, reg | (color_key & 0x00FFFFFFL),
587 SDC_GW_CTRL);
588
589 sdc_conf |= SDC_COM_KEY_COLOR_G;
590 } else {
591 sdc_conf &= ~SDC_COM_KEY_COLOR_G;
592 }
593 mx3fb_write_reg(mx3fb, sdc_conf, SDC_COM_CONF);
594
595 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
596
597 return 0;
598 }
599
600 /**
601 * sdc_set_global_alpha() - set global alpha blending modes.
602 * @mx3fb: mx3fb context.
603 * @enable: boolean to enable or disable global alpha blending. If disabled,
604 * per pixel blending is used.
605 * @alpha: global alpha value.
606 * @return: 0 on success or negative error code on failure.
607 */
608 static int sdc_set_global_alpha(struct mx3fb_data *mx3fb, bool enable, uint8_t alpha)
609 {
610 uint32_t reg;
611 unsigned long lock_flags;
612
613 spin_lock_irqsave(&mx3fb->lock, lock_flags);
614
615 if (enable) {
616 reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0x00FFFFFFL;
617 mx3fb_write_reg(mx3fb, reg | ((uint32_t) alpha << 24), SDC_GW_CTRL);
618
619 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
620 mx3fb_write_reg(mx3fb, reg | SDC_COM_GLB_A, SDC_COM_CONF);
621 } else {
622 reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
623 mx3fb_write_reg(mx3fb, reg & ~SDC_COM_GLB_A, SDC_COM_CONF);
624 }
625
626 spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
627
628 return 0;
629 }
630
631 static void sdc_set_brightness(struct mx3fb_data *mx3fb, uint8_t value)
632 {
633 dev_dbg(mx3fb->dev, "%s: value = %d\n", __func__, value);
634 /* This might be board-specific */
635 mx3fb_write_reg(mx3fb, 0x03000000UL | value << 16, SDC_PWM_CTRL);
636 return;
637 }
638
639 static uint32_t bpp_to_pixfmt(int bpp)
640 {
641 uint32_t pixfmt = 0;
642 switch (bpp) {
643 case 24:
644 pixfmt = IPU_PIX_FMT_BGR24;
645 break;
646 case 32:
647 pixfmt = IPU_PIX_FMT_BGR32;
648 break;
649 case 16:
650 pixfmt = IPU_PIX_FMT_RGB565;
651 break;
652 }
653 return pixfmt;
654 }
655
656 static int mx3fb_blank(int blank, struct fb_info *fbi);
657 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
658 bool lock);
659 static int mx3fb_unmap_video_memory(struct fb_info *fbi);
660
661 /**
662 * mx3fb_set_fix() - set fixed framebuffer parameters from variable settings.
663 * @info: framebuffer information pointer
664 * @return: 0 on success or negative error code on failure.
665 */
666 static int mx3fb_set_fix(struct fb_info *fbi)
667 {
668 struct fb_fix_screeninfo *fix = &fbi->fix;
669 struct fb_var_screeninfo *var = &fbi->var;
670
671 strncpy(fix->id, "DISP3 BG", 8);
672
673 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
674
675 fix->type = FB_TYPE_PACKED_PIXELS;
676 fix->accel = FB_ACCEL_NONE;
677 fix->visual = FB_VISUAL_TRUECOLOR;
678 fix->xpanstep = 1;
679 fix->ypanstep = 1;
680
681 return 0;
682 }
683
684 static void mx3fb_dma_done(void *arg)
685 {
686 struct idmac_tx_desc *tx_desc = to_tx_desc(arg);
687 struct dma_chan *chan = tx_desc->txd.chan;
688 struct idmac_channel *ichannel = to_idmac_chan(chan);
689 struct mx3fb_data *mx3fb = ichannel->client;
690 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
691
692 dev_dbg(mx3fb->dev, "irq %d callback\n", ichannel->eof_irq);
693
694 /* We only need one interrupt, it will be re-enabled as needed */
695 disable_irq_nosync(ichannel->eof_irq);
696
697 complete(&mx3_fbi->flip_cmpl);
698 }
699
700 static bool mx3fb_must_set_par(struct fb_info *fbi)
701 {
702 struct mx3fb_info *mx3_fbi = fbi->par;
703 struct fb_var_screeninfo old_var = mx3_fbi->cur_var;
704 struct fb_var_screeninfo new_var = fbi->var;
705
706 if ((fbi->var.activate & FB_ACTIVATE_FORCE) &&
707 (fbi->var.activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW)
708 return true;
709
710 /*
711 * Ignore xoffset and yoffset update,
712 * because pan display handles this case.
713 */
714 old_var.xoffset = new_var.xoffset;
715 old_var.yoffset = new_var.yoffset;
716
717 return !!memcmp(&old_var, &new_var, sizeof(struct fb_var_screeninfo));
718 }
719
720 static int __set_par(struct fb_info *fbi, bool lock)
721 {
722 u32 mem_len, cur_xoffset, cur_yoffset;
723 struct ipu_di_signal_cfg sig_cfg;
724 enum ipu_panel mode = IPU_PANEL_TFT;
725 struct mx3fb_info *mx3_fbi = fbi->par;
726 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
727 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
728 struct idmac_video_param *video = &ichan->params.video;
729 struct scatterlist *sg = mx3_fbi->sg;
730
731 /* Total cleanup */
732 if (mx3_fbi->txd)
733 sdc_disable_channel(mx3_fbi);
734
735 mx3fb_set_fix(fbi);
736
737 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
738 if (mem_len > fbi->fix.smem_len) {
739 if (fbi->fix.smem_start)
740 mx3fb_unmap_video_memory(fbi);
741
742 if (mx3fb_map_video_memory(fbi, mem_len, lock) < 0)
743 return -ENOMEM;
744 }
745
746 sg_init_table(&sg[0], 1);
747 sg_init_table(&sg[1], 1);
748
749 sg_dma_address(&sg[0]) = fbi->fix.smem_start;
750 sg_set_page(&sg[0], virt_to_page(fbi->screen_base),
751 fbi->fix.smem_len,
752 offset_in_page(fbi->screen_base));
753
754 if (mx3_fbi->ipu_ch == IDMAC_SDC_0) {
755 memset(&sig_cfg, 0, sizeof(sig_cfg));
756 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
757 sig_cfg.Hsync_pol = true;
758 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
759 sig_cfg.Vsync_pol = true;
760 if (fbi->var.sync & FB_SYNC_CLK_INVERT)
761 sig_cfg.clk_pol = true;
762 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
763 sig_cfg.data_pol = true;
764 if (fbi->var.sync & FB_SYNC_OE_ACT_HIGH)
765 sig_cfg.enable_pol = true;
766 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
767 sig_cfg.clkidle_en = true;
768 if (fbi->var.sync & FB_SYNC_CLK_SEL_EN)
769 sig_cfg.clksel_en = true;
770 if (fbi->var.sync & FB_SYNC_SHARP_MODE)
771 mode = IPU_PANEL_SHARP_TFT;
772
773 dev_dbg(fbi->device, "pixclock = %ul Hz\n",
774 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
775
776 if (sdc_init_panel(mx3fb, mode,
777 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
778 fbi->var.xres, fbi->var.yres,
779 fbi->var.left_margin,
780 fbi->var.hsync_len,
781 fbi->var.right_margin +
782 fbi->var.hsync_len,
783 fbi->var.upper_margin,
784 fbi->var.vsync_len,
785 fbi->var.lower_margin +
786 fbi->var.vsync_len, sig_cfg) != 0) {
787 dev_err(fbi->device,
788 "mx3fb: Error initializing panel.\n");
789 return -EINVAL;
790 }
791 }
792
793 sdc_set_window_pos(mx3fb, mx3_fbi->ipu_ch, 0, 0);
794
795 mx3_fbi->cur_ipu_buf = 0;
796
797 video->out_pixel_fmt = bpp_to_pixfmt(fbi->var.bits_per_pixel);
798 video->out_width = fbi->var.xres;
799 video->out_height = fbi->var.yres;
800 video->out_stride = fbi->var.xres_virtual;
801
802 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
803 sdc_enable_channel(mx3_fbi);
804 /*
805 * sg[0] points to fb smem_start address
806 * and is actually active in controller.
807 */
808 mx3_fbi->cur_var.xoffset = 0;
809 mx3_fbi->cur_var.yoffset = 0;
810 }
811
812 /*
813 * Preserve xoffset and yoffest in case they are
814 * inactive in controller as fb is blanked.
815 */
816 cur_xoffset = mx3_fbi->cur_var.xoffset;
817 cur_yoffset = mx3_fbi->cur_var.yoffset;
818 mx3_fbi->cur_var = fbi->var;
819 mx3_fbi->cur_var.xoffset = cur_xoffset;
820 mx3_fbi->cur_var.yoffset = cur_yoffset;
821
822 return 0;
823 }
824
825 /**
826 * mx3fb_set_par() - set framebuffer parameters and change the operating mode.
827 * @fbi: framebuffer information pointer.
828 * @return: 0 on success or negative error code on failure.
829 */
830 static int mx3fb_set_par(struct fb_info *fbi)
831 {
832 struct mx3fb_info *mx3_fbi = fbi->par;
833 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
834 struct idmac_channel *ichan = mx3_fbi->idmac_channel;
835 int ret;
836
837 dev_dbg(mx3fb->dev, "%s [%c]\n", __func__, list_empty(&ichan->queue) ? '-' : '+');
838
839 mutex_lock(&mx3_fbi->mutex);
840
841 ret = mx3fb_must_set_par(fbi) ? __set_par(fbi, true) : 0;
842
843 mutex_unlock(&mx3_fbi->mutex);
844
845 return ret;
846 }
847
848 /**
849 * mx3fb_check_var() - check and adjust framebuffer variable parameters.
850 * @var: framebuffer variable parameters
851 * @fbi: framebuffer information pointer
852 */
853 static int mx3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
854 {
855 struct mx3fb_info *mx3_fbi = fbi->par;
856 u32 vtotal;
857 u32 htotal;
858
859 dev_dbg(fbi->device, "%s\n", __func__);
860
861 if (var->xres_virtual < var->xres)
862 var->xres_virtual = var->xres;
863 if (var->yres_virtual < var->yres)
864 var->yres_virtual = var->yres;
865
866 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
867 (var->bits_per_pixel != 16))
868 var->bits_per_pixel = default_bpp;
869
870 switch (var->bits_per_pixel) {
871 case 16:
872 var->red.length = 5;
873 var->red.offset = 11;
874 var->red.msb_right = 0;
875
876 var->green.length = 6;
877 var->green.offset = 5;
878 var->green.msb_right = 0;
879
880 var->blue.length = 5;
881 var->blue.offset = 0;
882 var->blue.msb_right = 0;
883
884 var->transp.length = 0;
885 var->transp.offset = 0;
886 var->transp.msb_right = 0;
887 break;
888 case 24:
889 var->red.length = 8;
890 var->red.offset = 16;
891 var->red.msb_right = 0;
892
893 var->green.length = 8;
894 var->green.offset = 8;
895 var->green.msb_right = 0;
896
897 var->blue.length = 8;
898 var->blue.offset = 0;
899 var->blue.msb_right = 0;
900
901 var->transp.length = 0;
902 var->transp.offset = 0;
903 var->transp.msb_right = 0;
904 break;
905 case 32:
906 var->red.length = 8;
907 var->red.offset = 16;
908 var->red.msb_right = 0;
909
910 var->green.length = 8;
911 var->green.offset = 8;
912 var->green.msb_right = 0;
913
914 var->blue.length = 8;
915 var->blue.offset = 0;
916 var->blue.msb_right = 0;
917
918 var->transp.length = 8;
919 var->transp.offset = 24;
920 var->transp.msb_right = 0;
921 break;
922 }
923
924 if (var->pixclock < 1000) {
925 htotal = var->xres + var->right_margin + var->hsync_len +
926 var->left_margin;
927 vtotal = var->yres + var->lower_margin + var->vsync_len +
928 var->upper_margin;
929 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
930 var->pixclock = KHZ2PICOS(var->pixclock);
931 dev_dbg(fbi->device, "pixclock set for 60Hz refresh = %u ps\n",
932 var->pixclock);
933 }
934
935 var->height = -1;
936 var->width = -1;
937 var->grayscale = 0;
938
939 /* Preserve sync flags */
940 var->sync |= mx3_fbi->cur_var.sync;
941 mx3_fbi->cur_var.sync |= var->sync;
942
943 return 0;
944 }
945
946 static u32 chan_to_field(unsigned int chan, struct fb_bitfield *bf)
947 {
948 chan &= 0xffff;
949 chan >>= 16 - bf->length;
950 return chan << bf->offset;
951 }
952
953 static int mx3fb_setcolreg(unsigned int regno, unsigned int red,
954 unsigned int green, unsigned int blue,
955 unsigned int trans, struct fb_info *fbi)
956 {
957 struct mx3fb_info *mx3_fbi = fbi->par;
958 u32 val;
959 int ret = 1;
960
961 dev_dbg(fbi->device, "%s, regno = %u\n", __func__, regno);
962
963 mutex_lock(&mx3_fbi->mutex);
964 /*
965 * If greyscale is true, then we convert the RGB value
966 * to greyscale no matter what visual we are using.
967 */
968 if (fbi->var.grayscale)
969 red = green = blue = (19595 * red + 38470 * green +
970 7471 * blue) >> 16;
971 switch (fbi->fix.visual) {
972 case FB_VISUAL_TRUECOLOR:
973 /*
974 * 16-bit True Colour. We encode the RGB value
975 * according to the RGB bitfield information.
976 */
977 if (regno < 16) {
978 u32 *pal = fbi->pseudo_palette;
979
980 val = chan_to_field(red, &fbi->var.red);
981 val |= chan_to_field(green, &fbi->var.green);
982 val |= chan_to_field(blue, &fbi->var.blue);
983
984 pal[regno] = val;
985
986 ret = 0;
987 }
988 break;
989
990 case FB_VISUAL_STATIC_PSEUDOCOLOR:
991 case FB_VISUAL_PSEUDOCOLOR:
992 break;
993 }
994 mutex_unlock(&mx3_fbi->mutex);
995
996 return ret;
997 }
998
999 static void __blank(int blank, struct fb_info *fbi)
1000 {
1001 struct mx3fb_info *mx3_fbi = fbi->par;
1002 struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
1003 int was_blank = mx3_fbi->blank;
1004
1005 mx3_fbi->blank = blank;
1006
1007 /* Attention!
1008 * Do not call sdc_disable_channel() for a channel that is disabled
1009 * already! This will result in a kernel NULL pointer dereference
1010 * (mx3_fbi->txd is NULL). Hide the fact, that all blank modes are
1011 * handled equally by this driver.
1012 */
1013 if (blank > FB_BLANK_UNBLANK && was_blank > FB_BLANK_UNBLANK)
1014 return;
1015
1016 switch (blank) {
1017 case FB_BLANK_POWERDOWN:
1018 case FB_BLANK_VSYNC_SUSPEND:
1019 case FB_BLANK_HSYNC_SUSPEND:
1020 case FB_BLANK_NORMAL:
1021 sdc_set_brightness(mx3fb, 0);
1022 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
1023 /* Give LCD time to update - enough for 50 and 60 Hz */
1024 msleep(25);
1025 sdc_disable_channel(mx3_fbi);
1026 break;
1027 case FB_BLANK_UNBLANK:
1028 sdc_enable_channel(mx3_fbi);
1029 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1030 break;
1031 }
1032 }
1033
1034 /**
1035 * mx3fb_blank() - blank the display.
1036 */
1037 static int mx3fb_blank(int blank, struct fb_info *fbi)
1038 {
1039 struct mx3fb_info *mx3_fbi = fbi->par;
1040
1041 dev_dbg(fbi->device, "%s, blank = %d, base %p, len %u\n", __func__,
1042 blank, fbi->screen_base, fbi->fix.smem_len);
1043
1044 if (mx3_fbi->blank == blank)
1045 return 0;
1046
1047 mutex_lock(&mx3_fbi->mutex);
1048 __blank(blank, fbi);
1049 mutex_unlock(&mx3_fbi->mutex);
1050
1051 return 0;
1052 }
1053
1054 /**
1055 * mx3fb_pan_display() - pan or wrap the display
1056 * @var: variable screen buffer information.
1057 * @info: framebuffer information pointer.
1058 *
1059 * We look only at xoffset, yoffset and the FB_VMODE_YWRAP flag
1060 */
1061 static int mx3fb_pan_display(struct fb_var_screeninfo *var,
1062 struct fb_info *fbi)
1063 {
1064 struct mx3fb_info *mx3_fbi = fbi->par;
1065 u32 y_bottom;
1066 unsigned long base;
1067 off_t offset;
1068 dma_cookie_t cookie;
1069 struct scatterlist *sg = mx3_fbi->sg;
1070 struct dma_chan *dma_chan = &mx3_fbi->idmac_channel->dma_chan;
1071 struct dma_async_tx_descriptor *txd;
1072 int ret;
1073
1074 dev_dbg(fbi->device, "%s [%c]\n", __func__,
1075 list_empty(&mx3_fbi->idmac_channel->queue) ? '-' : '+');
1076
1077 if (var->xoffset > 0) {
1078 dev_dbg(fbi->device, "x panning not supported\n");
1079 return -EINVAL;
1080 }
1081
1082 if (mx3_fbi->cur_var.xoffset == var->xoffset &&
1083 mx3_fbi->cur_var.yoffset == var->yoffset)
1084 return 0; /* No change, do nothing */
1085
1086 y_bottom = var->yoffset;
1087
1088 if (!(var->vmode & FB_VMODE_YWRAP))
1089 y_bottom += fbi->var.yres;
1090
1091 if (y_bottom > fbi->var.yres_virtual)
1092 return -EINVAL;
1093
1094 mutex_lock(&mx3_fbi->mutex);
1095
1096 offset = var->yoffset * fbi->fix.line_length
1097 + var->xoffset * (fbi->var.bits_per_pixel / 8);
1098 base = fbi->fix.smem_start + offset;
1099
1100 dev_dbg(fbi->device, "Updating SDC BG buf %d address=0x%08lX\n",
1101 mx3_fbi->cur_ipu_buf, base);
1102
1103 /*
1104 * We enable the End of Frame interrupt, which will free a tx-descriptor,
1105 * which we will need for the next device_prep_slave_sg(). The
1106 * IRQ-handler will disable the IRQ again.
1107 */
1108 init_completion(&mx3_fbi->flip_cmpl);
1109 enable_irq(mx3_fbi->idmac_channel->eof_irq);
1110
1111 ret = wait_for_completion_timeout(&mx3_fbi->flip_cmpl, HZ / 10);
1112 if (ret <= 0) {
1113 mutex_unlock(&mx3_fbi->mutex);
1114 dev_info(fbi->device, "Panning failed due to %s\n", ret < 0 ?
1115 "user interrupt" : "timeout");
1116 disable_irq(mx3_fbi->idmac_channel->eof_irq);
1117 return ret ? : -ETIMEDOUT;
1118 }
1119
1120 mx3_fbi->cur_ipu_buf = !mx3_fbi->cur_ipu_buf;
1121
1122 sg_dma_address(&sg[mx3_fbi->cur_ipu_buf]) = base;
1123 sg_set_page(&sg[mx3_fbi->cur_ipu_buf],
1124 virt_to_page(fbi->screen_base + offset), fbi->fix.smem_len,
1125 offset_in_page(fbi->screen_base + offset));
1126
1127 if (mx3_fbi->txd)
1128 async_tx_ack(mx3_fbi->txd);
1129
1130 txd = dmaengine_prep_slave_sg(dma_chan, sg +
1131 mx3_fbi->cur_ipu_buf, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
1132 if (!txd) {
1133 dev_err(fbi->device,
1134 "Error preparing a DMA transaction descriptor.\n");
1135 mutex_unlock(&mx3_fbi->mutex);
1136 return -EIO;
1137 }
1138
1139 txd->callback_param = txd;
1140 txd->callback = mx3fb_dma_done;
1141
1142 /*
1143 * Emulate original mx3fb behaviour: each new call to idmac_tx_submit()
1144 * should switch to another buffer
1145 */
1146 cookie = txd->tx_submit(txd);
1147 dev_dbg(fbi->device, "%d: Submit %p #%d\n", __LINE__, txd, cookie);
1148 if (cookie < 0) {
1149 dev_err(fbi->device,
1150 "Error updating SDC buf %d to address=0x%08lX\n",
1151 mx3_fbi->cur_ipu_buf, base);
1152 mutex_unlock(&mx3_fbi->mutex);
1153 return -EIO;
1154 }
1155
1156 mx3_fbi->txd = txd;
1157
1158 fbi->var.xoffset = var->xoffset;
1159 fbi->var.yoffset = var->yoffset;
1160
1161 if (var->vmode & FB_VMODE_YWRAP)
1162 fbi->var.vmode |= FB_VMODE_YWRAP;
1163 else
1164 fbi->var.vmode &= ~FB_VMODE_YWRAP;
1165
1166 mx3_fbi->cur_var = fbi->var;
1167
1168 mutex_unlock(&mx3_fbi->mutex);
1169
1170 dev_dbg(fbi->device, "Update complete\n");
1171
1172 return 0;
1173 }
1174
1175 /*
1176 * This structure contains the pointers to the control functions that are
1177 * invoked by the core framebuffer driver to perform operations like
1178 * blitting, rectangle filling, copy regions and cursor definition.
1179 */
1180 static struct fb_ops mx3fb_ops = {
1181 .owner = THIS_MODULE,
1182 .fb_set_par = mx3fb_set_par,
1183 .fb_check_var = mx3fb_check_var,
1184 .fb_setcolreg = mx3fb_setcolreg,
1185 .fb_pan_display = mx3fb_pan_display,
1186 .fb_fillrect = cfb_fillrect,
1187 .fb_copyarea = cfb_copyarea,
1188 .fb_imageblit = cfb_imageblit,
1189 .fb_blank = mx3fb_blank,
1190 };
1191
1192 #ifdef CONFIG_PM
1193 /*
1194 * Power management hooks. Note that we won't be called from IRQ context,
1195 * unlike the blank functions above, so we may sleep.
1196 */
1197
1198 /*
1199 * Suspends the framebuffer and blanks the screen. Power management support
1200 */
1201 static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state)
1202 {
1203 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1204 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1205
1206 console_lock();
1207 fb_set_suspend(mx3fb->fbi, 1);
1208 console_unlock();
1209
1210 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1211 sdc_disable_channel(mx3_fbi);
1212 sdc_set_brightness(mx3fb, 0);
1213
1214 }
1215 return 0;
1216 }
1217
1218 /*
1219 * Resumes the framebuffer and unblanks the screen. Power management support
1220 */
1221 static int mx3fb_resume(struct platform_device *pdev)
1222 {
1223 struct mx3fb_data *mx3fb = platform_get_drvdata(pdev);
1224 struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
1225
1226 if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
1227 sdc_enable_channel(mx3_fbi);
1228 sdc_set_brightness(mx3fb, mx3fb->backlight_level);
1229 }
1230
1231 console_lock();
1232 fb_set_suspend(mx3fb->fbi, 0);
1233 console_unlock();
1234
1235 return 0;
1236 }
1237 #else
1238 #define mx3fb_suspend NULL
1239 #define mx3fb_resume NULL
1240 #endif
1241
1242 /*
1243 * Main framebuffer functions
1244 */
1245
1246 /**
1247 * mx3fb_map_video_memory() - allocates the DRAM memory for the frame buffer.
1248 * @fbi: framebuffer information pointer
1249 * @mem_len: length of mapped memory
1250 * @lock: do not lock during initialisation
1251 * @return: Error code indicating success or failure
1252 *
1253 * This buffer is remapped into a non-cached, non-buffered, memory region to
1254 * allow palette and pixel writes to occur without flushing the cache. Once this
1255 * area is remapped, all virtual memory access to the video memory should occur
1256 * at the new region.
1257 */
1258 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
1259 bool lock)
1260 {
1261 int retval = 0;
1262 dma_addr_t addr;
1263
1264 fbi->screen_base = dma_alloc_writecombine(fbi->device,
1265 mem_len,
1266 &addr, GFP_DMA);
1267
1268 if (!fbi->screen_base) {
1269 dev_err(fbi->device, "Cannot allocate %u bytes framebuffer memory\n",
1270 mem_len);
1271 retval = -EBUSY;
1272 goto err0;
1273 }
1274
1275 if (lock)
1276 mutex_lock(&fbi->mm_lock);
1277 fbi->fix.smem_start = addr;
1278 fbi->fix.smem_len = mem_len;
1279 if (lock)
1280 mutex_unlock(&fbi->mm_lock);
1281
1282 dev_dbg(fbi->device, "allocated fb @ p=0x%08x, v=0x%p, size=%d.\n",
1283 (uint32_t) fbi->fix.smem_start, fbi->screen_base, fbi->fix.smem_len);
1284
1285 fbi->screen_size = fbi->fix.smem_len;
1286
1287 /* Clear the screen */
1288 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
1289
1290 return 0;
1291
1292 err0:
1293 fbi->fix.smem_len = 0;
1294 fbi->fix.smem_start = 0;
1295 fbi->screen_base = NULL;
1296 return retval;
1297 }
1298
1299 /**
1300 * mx3fb_unmap_video_memory() - de-allocate frame buffer memory.
1301 * @fbi: framebuffer information pointer
1302 * @return: error code indicating success or failure
1303 */
1304 static int mx3fb_unmap_video_memory(struct fb_info *fbi)
1305 {
1306 dma_free_writecombine(fbi->device, fbi->fix.smem_len,
1307 fbi->screen_base, fbi->fix.smem_start);
1308
1309 fbi->screen_base = NULL;
1310 mutex_lock(&fbi->mm_lock);
1311 fbi->fix.smem_start = 0;
1312 fbi->fix.smem_len = 0;
1313 mutex_unlock(&fbi->mm_lock);
1314 return 0;
1315 }
1316
1317 /**
1318 * mx3fb_init_fbinfo() - initialize framebuffer information object.
1319 * @return: initialized framebuffer structure.
1320 */
1321 static struct fb_info *mx3fb_init_fbinfo(struct device *dev, struct fb_ops *ops)
1322 {
1323 struct fb_info *fbi;
1324 struct mx3fb_info *mx3fbi;
1325 int ret;
1326
1327 /* Allocate sufficient memory for the fb structure */
1328 fbi = framebuffer_alloc(sizeof(struct mx3fb_info), dev);
1329 if (!fbi)
1330 return NULL;
1331
1332 mx3fbi = fbi->par;
1333 mx3fbi->cookie = -EINVAL;
1334 mx3fbi->cur_ipu_buf = 0;
1335
1336 fbi->var.activate = FB_ACTIVATE_NOW;
1337
1338 fbi->fbops = ops;
1339 fbi->flags = FBINFO_FLAG_DEFAULT;
1340 fbi->pseudo_palette = mx3fbi->pseudo_palette;
1341
1342 mutex_init(&mx3fbi->mutex);
1343
1344 /* Allocate colormap */
1345 ret = fb_alloc_cmap(&fbi->cmap, 16, 0);
1346 if (ret < 0) {
1347 framebuffer_release(fbi);
1348 return NULL;
1349 }
1350
1351 return fbi;
1352 }
1353
1354 static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan)
1355 {
1356 struct device *dev = mx3fb->dev;
1357 struct mx3fb_platform_data *mx3fb_pdata = dev->platform_data;
1358 const char *name = mx3fb_pdata->name;
1359 unsigned int irq;
1360 struct fb_info *fbi;
1361 struct mx3fb_info *mx3fbi;
1362 const struct fb_videomode *mode;
1363 int ret, num_modes;
1364
1365 if (mx3fb_pdata->disp_data_fmt >= ARRAY_SIZE(di_mappings)) {
1366 dev_err(dev, "Illegal display data format %d\n",
1367 mx3fb_pdata->disp_data_fmt);
1368 return -EINVAL;
1369 }
1370
1371 ichan->client = mx3fb;
1372 irq = ichan->eof_irq;
1373
1374 if (ichan->dma_chan.chan_id != IDMAC_SDC_0)
1375 return -EINVAL;
1376
1377 fbi = mx3fb_init_fbinfo(dev, &mx3fb_ops);
1378 if (!fbi)
1379 return -ENOMEM;
1380
1381 if (!fb_mode)
1382 fb_mode = name;
1383
1384 if (!fb_mode) {
1385 ret = -EINVAL;
1386 goto emode;
1387 }
1388
1389 if (mx3fb_pdata->mode && mx3fb_pdata->num_modes) {
1390 mode = mx3fb_pdata->mode;
1391 num_modes = mx3fb_pdata->num_modes;
1392 } else {
1393 mode = mx3fb_modedb;
1394 num_modes = ARRAY_SIZE(mx3fb_modedb);
1395 }
1396
1397 if (!fb_find_mode(&fbi->var, fbi, fb_mode, mode,
1398 num_modes, NULL, default_bpp)) {
1399 ret = -EBUSY;
1400 goto emode;
1401 }
1402
1403 fb_videomode_to_modelist(mode, num_modes, &fbi->modelist);
1404
1405 /* Default Y virtual size is 2x panel size */
1406 fbi->var.yres_virtual = fbi->var.yres * 2;
1407
1408 mx3fb->fbi = fbi;
1409
1410 /* set Display Interface clock period */
1411 mx3fb_write_reg(mx3fb, 0x00100010L, DI_HSP_CLK_PER);
1412 /* Might need to trigger HSP clock change - see 44.3.3.8.5 */
1413
1414 sdc_set_brightness(mx3fb, 255);
1415 sdc_set_global_alpha(mx3fb, true, 0xFF);
1416 sdc_set_color_key(mx3fb, IDMAC_SDC_0, false, 0);
1417
1418 mx3fbi = fbi->par;
1419 mx3fbi->idmac_channel = ichan;
1420 mx3fbi->ipu_ch = ichan->dma_chan.chan_id;
1421 mx3fbi->mx3fb = mx3fb;
1422 mx3fbi->blank = FB_BLANK_NORMAL;
1423
1424 mx3fb->disp_data_fmt = mx3fb_pdata->disp_data_fmt;
1425
1426 init_completion(&mx3fbi->flip_cmpl);
1427 disable_irq(ichan->eof_irq);
1428 dev_dbg(mx3fb->dev, "disabling irq %d\n", ichan->eof_irq);
1429 ret = __set_par(fbi, false);
1430 if (ret < 0)
1431 goto esetpar;
1432
1433 __blank(FB_BLANK_UNBLANK, fbi);
1434
1435 dev_info(dev, "registered, using mode %s\n", fb_mode);
1436
1437 ret = register_framebuffer(fbi);
1438 if (ret < 0)
1439 goto erfb;
1440
1441 return 0;
1442
1443 erfb:
1444 esetpar:
1445 emode:
1446 fb_dealloc_cmap(&fbi->cmap);
1447 framebuffer_release(fbi);
1448
1449 return ret;
1450 }
1451
1452 static bool chan_filter(struct dma_chan *chan, void *arg)
1453 {
1454 struct dma_chan_request *rq = arg;
1455 struct device *dev;
1456 struct mx3fb_platform_data *mx3fb_pdata;
1457
1458 if (!imx_dma_is_ipu(chan))
1459 return false;
1460
1461 if (!rq)
1462 return false;
1463
1464 dev = rq->mx3fb->dev;
1465 mx3fb_pdata = dev->platform_data;
1466
1467 return rq->id == chan->chan_id &&
1468 mx3fb_pdata->dma_dev == chan->device->dev;
1469 }
1470
1471 static void release_fbi(struct fb_info *fbi)
1472 {
1473 mx3fb_unmap_video_memory(fbi);
1474
1475 fb_dealloc_cmap(&fbi->cmap);
1476
1477 unregister_framebuffer(fbi);
1478 framebuffer_release(fbi);
1479 }
1480
1481 static int mx3fb_probe(struct platform_device *pdev)
1482 {
1483 struct device *dev = &pdev->dev;
1484 int ret;
1485 struct resource *sdc_reg;
1486 struct mx3fb_data *mx3fb;
1487 dma_cap_mask_t mask;
1488 struct dma_chan *chan;
1489 struct dma_chan_request rq;
1490
1491 /*
1492 * Display Interface (DI) and Synchronous Display Controller (SDC)
1493 * registers
1494 */
1495 sdc_reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1496 if (!sdc_reg)
1497 return -EINVAL;
1498
1499 mx3fb = kzalloc(sizeof(*mx3fb), GFP_KERNEL);
1500 if (!mx3fb)
1501 return -ENOMEM;
1502
1503 spin_lock_init(&mx3fb->lock);
1504
1505 mx3fb->reg_base = ioremap(sdc_reg->start, resource_size(sdc_reg));
1506 if (!mx3fb->reg_base) {
1507 ret = -ENOMEM;
1508 goto eremap;
1509 }
1510
1511 pr_debug("Remapped %pR at %p\n", sdc_reg, mx3fb->reg_base);
1512
1513 /* IDMAC interface */
1514 dmaengine_get();
1515
1516 mx3fb->dev = dev;
1517 platform_set_drvdata(pdev, mx3fb);
1518
1519 rq.mx3fb = mx3fb;
1520
1521 dma_cap_zero(mask);
1522 dma_cap_set(DMA_SLAVE, mask);
1523 dma_cap_set(DMA_PRIVATE, mask);
1524 rq.id = IDMAC_SDC_0;
1525 chan = dma_request_channel(mask, chan_filter, &rq);
1526 if (!chan) {
1527 ret = -EBUSY;
1528 goto ersdc0;
1529 }
1530
1531 mx3fb->backlight_level = 255;
1532
1533 ret = init_fb_chan(mx3fb, to_idmac_chan(chan));
1534 if (ret < 0)
1535 goto eisdc0;
1536
1537 return 0;
1538
1539 eisdc0:
1540 dma_release_channel(chan);
1541 ersdc0:
1542 dmaengine_put();
1543 iounmap(mx3fb->reg_base);
1544 eremap:
1545 kfree(mx3fb);
1546 dev_err(dev, "mx3fb: failed to register fb\n");
1547 return ret;
1548 }
1549
1550 static int mx3fb_remove(struct platform_device *dev)
1551 {
1552 struct mx3fb_data *mx3fb = platform_get_drvdata(dev);
1553 struct fb_info *fbi = mx3fb->fbi;
1554 struct mx3fb_info *mx3_fbi = fbi->par;
1555 struct dma_chan *chan;
1556
1557 chan = &mx3_fbi->idmac_channel->dma_chan;
1558 release_fbi(fbi);
1559
1560 dma_release_channel(chan);
1561 dmaengine_put();
1562
1563 iounmap(mx3fb->reg_base);
1564 kfree(mx3fb);
1565 return 0;
1566 }
1567
1568 static struct platform_driver mx3fb_driver = {
1569 .driver = {
1570 .name = MX3FB_NAME,
1571 .owner = THIS_MODULE,
1572 },
1573 .probe = mx3fb_probe,
1574 .remove = mx3fb_remove,
1575 .suspend = mx3fb_suspend,
1576 .resume = mx3fb_resume,
1577 };
1578
1579 /*
1580 * Parse user specified options (`video=mx3fb:')
1581 * example:
1582 * video=mx3fb:bpp=16
1583 */
1584 static int __init mx3fb_setup(void)
1585 {
1586 #ifndef MODULE
1587 char *opt, *options = NULL;
1588
1589 if (fb_get_options("mx3fb", &options))
1590 return -ENODEV;
1591
1592 if (!options || !*options)
1593 return 0;
1594
1595 while ((opt = strsep(&options, ",")) != NULL) {
1596 if (!*opt)
1597 continue;
1598 if (!strncmp(opt, "bpp=", 4))
1599 default_bpp = simple_strtoul(opt + 4, NULL, 0);
1600 else
1601 fb_mode = opt;
1602 }
1603 #endif
1604
1605 return 0;
1606 }
1607
1608 static int __init mx3fb_init(void)
1609 {
1610 int ret = mx3fb_setup();
1611
1612 if (ret < 0)
1613 return ret;
1614
1615 ret = platform_driver_register(&mx3fb_driver);
1616 return ret;
1617 }
1618
1619 static void __exit mx3fb_exit(void)
1620 {
1621 platform_driver_unregister(&mx3fb_driver);
1622 }
1623
1624 module_init(mx3fb_init);
1625 module_exit(mx3fb_exit);
1626
1627 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1628 MODULE_DESCRIPTION("MX3 framebuffer driver");
1629 MODULE_ALIAS("platform:" MX3FB_NAME);
1630 MODULE_LICENSE("GPL v2");
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