1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Video driver for Marvell Armada XP SoC
4 *
5 * Initialization of LCD interface and setup of SPLASH screen image
6 */
7
8 #include <common.h>
9 #include <video_fb.h>
10 #include <linux/mbus.h>
11 #include <asm/io.h>
12 #include <asm/arch/cpu.h>
13 #include <asm/arch/soc.h>
14
15 #define MVEBU_LCD_WIN_CONTROL(w) (MVEBU_LCD_BASE + 0xf000 + ((w) << 4))
16 #define MVEBU_LCD_WIN_BASE(w) (MVEBU_LCD_BASE + 0xf004 + ((w) << 4))
17 #define MVEBU_LCD_WIN_REMAP(w) (MVEBU_LCD_BASE + 0xf00c + ((w) << 4))
18
19 #define MVEBU_LCD_CFG_DMA_START_ADDR_0 (MVEBU_LCD_BASE + 0x00cc)
20 #define MVEBU_LCD_CFG_DMA_START_ADDR_1 (MVEBU_LCD_BASE + 0x00dc)
21
22 #define MVEBU_LCD_CFG_GRA_START_ADDR0 (MVEBU_LCD_BASE + 0x00f4)
23 #define MVEBU_LCD_CFG_GRA_START_ADDR1 (MVEBU_LCD_BASE + 0x00f8)
24 #define MVEBU_LCD_CFG_GRA_PITCH (MVEBU_LCD_BASE + 0x00fc)
25 #define MVEBU_LCD_SPU_GRA_OVSA_HPXL_VLN (MVEBU_LCD_BASE + 0x0100)
26 #define MVEBU_LCD_SPU_GRA_HPXL_VLN (MVEBU_LCD_BASE + 0x0104)
27 #define MVEBU_LCD_SPU_GZM_HPXL_VLN (MVEBU_LCD_BASE + 0x0108)
28 #define MVEBU_LCD_SPU_HWC_OVSA_HPXL_VLN (MVEBU_LCD_BASE + 0x010c)
29 #define MVEBU_LCD_SPU_HWC_HPXL_VLN (MVEBU_LCD_BASE + 0x0110)
30 #define MVEBU_LCD_SPUT_V_H_TOTAL (MVEBU_LCD_BASE + 0x0114)
31 #define MVEBU_LCD_SPU_V_H_ACTIVE (MVEBU_LCD_BASE + 0x0118)
32 #define MVEBU_LCD_SPU_H_PORCH (MVEBU_LCD_BASE + 0x011c)
33 #define MVEBU_LCD_SPU_V_PORCH (MVEBU_LCD_BASE + 0x0120)
34 #define MVEBU_LCD_SPU_BLANKCOLOR (MVEBU_LCD_BASE + 0x0124)
35 #define MVEBU_LCD_SPU_ALPHA_COLOR1 (MVEBU_LCD_BASE + 0x0128)
36 #define MVEBU_LCD_SPU_ALPHA_COLOR2 (MVEBU_LCD_BASE + 0x012c)
37 #define MVEBU_LCD_SPU_COLORKEY_Y (MVEBU_LCD_BASE + 0x0130)
38 #define MVEBU_LCD_SPU_COLORKEY_U (MVEBU_LCD_BASE + 0x0134)
39 #define MVEBU_LCD_SPU_COLORKEY_V (MVEBU_LCD_BASE + 0x0138)
40 #define MVEBU_LCD_CFG_RDREG4F (MVEBU_LCD_BASE + 0x013c)
41 #define MVEBU_LCD_SPU_SPI_RXDATA (MVEBU_LCD_BASE + 0x0140)
42 #define MVEBU_LCD_SPU_ISA_RXDATA (MVEBU_LCD_BASE + 0x0144)
43 #define MVEBU_LCD_SPU_DBG_ISA (MVEBU_LCD_BASE + 0x0148)
44
45 #define MVEBU_LCD_SPU_HWC_RDDAT (MVEBU_LCD_BASE + 0x0158)
46 #define MVEBU_LCD_SPU_GAMMA_RDDAT (MVEBU_LCD_BASE + 0x015c)
47 #define MVEBU_LCD_SPU_PALETTE_RDDAT (MVEBU_LCD_BASE + 0x0160)
48 #define MVEBU_LCD_SPU_IOPAD_IN (MVEBU_LCD_BASE + 0x0178)
49 #define MVEBU_LCD_FRAME_COUNT (MVEBU_LCD_BASE + 0x017c)
50 #define MVEBU_LCD_SPU_DMA_CTRL0 (MVEBU_LCD_BASE + 0x0190)
51 #define MVEBU_LCD_SPU_DMA_CTRL1 (MVEBU_LCD_BASE + 0x0194)
52 #define MVEBU_LCD_SPU_SRAM_CTRL (MVEBU_LCD_BASE + 0x0198)
53 #define MVEBU_LCD_SPU_SRAM_WRDAT (MVEBU_LCD_BASE + 0x019c)
54 #define MVEBU_LCD_SPU_SRAM_PARA0 (MVEBU_LCD_BASE + 0x01a0)
55 #define MVEBU_LCD_SPU_SRAM_PARA1 (MVEBU_LCD_BASE + 0x01a4)
56 #define MVEBU_LCD_CFG_SCLK_DIV (MVEBU_LCD_BASE + 0x01a8)
57 #define MVEBU_LCD_SPU_CONTRAST (MVEBU_LCD_BASE + 0x01ac)
58 #define MVEBU_LCD_SPU_SATURATION (MVEBU_LCD_BASE + 0x01b0)
59 #define MVEBU_LCD_SPU_CBSH_HUE (MVEBU_LCD_BASE + 0x01b4)
60 #define MVEBU_LCD_SPU_DUMB_CTRL (MVEBU_LCD_BASE + 0x01b8)
61 #define MVEBU_LCD_SPU_IOPAD_CONTROL (MVEBU_LCD_BASE + 0x01bc)
62 #define MVEBU_LCD_SPU_IRQ_ENA_2 (MVEBU_LCD_BASE + 0x01d8)
63 #define MVEBU_LCD_SPU_IRQ_ISR_2 (MVEBU_LCD_BASE + 0x01dc)
64 #define MVEBU_LCD_SPU_IRQ_ENA (MVEBU_LCD_BASE + 0x01c0)
65 #define MVEBU_LCD_SPU_IRQ_ISR (MVEBU_LCD_BASE + 0x01c4)
66 #define MVEBU_LCD_ADLL_CTRL (MVEBU_LCD_BASE + 0x01c8)
67 #define MVEBU_LCD_CLK_DIS (MVEBU_LCD_BASE + 0x01cc)
68 #define MVEBU_LCD_VGA_HVSYNC_DELAY (MVEBU_LCD_BASE + 0x01d4)
69 #define MVEBU_LCD_CLK_CFG_0 (MVEBU_LCD_BASE + 0xf0a0)
70 #define MVEBU_LCD_CLK_CFG_1 (MVEBU_LCD_BASE + 0xf0a4)
71 #define MVEBU_LCD_LVDS_CLK_CFG (MVEBU_LCD_BASE + 0xf0ac)
72
73 #define MVEBU_LVDS_PADS_REG (MVEBU_SYSTEM_REG_BASE + 0xf0)
74
75 /* Setup Mbus Bridge Windows for LCD */
mvebu_lcd_conf_mbus_registers(void)76 static void mvebu_lcd_conf_mbus_registers(void)
77 {
78 const struct mbus_dram_target_info *dram;
79 int i;
80
81 dram = mvebu_mbus_dram_info();
82
83 /* Disable windows, set size/base/remap to 0 */
84 for (i = 0; i < 6; i++) {
85 writel(0, MVEBU_LCD_WIN_CONTROL(i));
86 writel(0, MVEBU_LCD_WIN_BASE(i));
87 writel(0, MVEBU_LCD_WIN_REMAP(i));
88 }
89
90 /* Write LCD bridge window registers */
91 for (i = 0; i < dram->num_cs; i++) {
92 const struct mbus_dram_window *cs = dram->cs + i;
93 writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
94 (dram->mbus_dram_target_id << 4) | 1,
95 MVEBU_LCD_WIN_CONTROL(i));
96
97 writel(cs->base & 0xffff0000, MVEBU_LCD_WIN_BASE(i));
98 }
99 }
100
101 /* Initialize LCD registers */
mvebu_lcd_register_init(struct mvebu_lcd_info * lcd_info)102 int mvebu_lcd_register_init(struct mvebu_lcd_info *lcd_info)
103 {
104 /* Local variable for easier handling */
105 int x = lcd_info->x_res;
106 int y = lcd_info->y_res;
107 u32 val;
108
109 /* Setup Mbus Bridge Windows */
110 mvebu_lcd_conf_mbus_registers();
111
112 /*
113 * Set LVDS Pads Control Register
114 * wr 0 182F0 FFE00000
115 */
116 clrbits_le32(MVEBU_LVDS_PADS_REG, 0x1f << 16);
117
118 /*
119 * Set the LCD_CFG_GRA_START_ADDR0/1 Registers
120 * This is supposed to point to the "physical" memory at memory
121 * end (currently 1GB-64MB but also may be 2GB-64MB).
122 * See also the Window 0 settings!
123 */
124 writel(lcd_info->fb_base, MVEBU_LCD_CFG_GRA_START_ADDR0);
125 writel(lcd_info->fb_base, MVEBU_LCD_CFG_GRA_START_ADDR1);
126
127 /*
128 * Set the LCD_CFG_GRA_PITCH Register
129 * Bits 31-28: Duty Cycle of Backlight. value/16=High (0x8=Mid Setting)
130 * Bits 25-16: Backlight divider from 32kHz Clock
131 * (here 16=0x10 for 1kHz)
132 * Bits 15-00: Line Length in Bytes
133 * 240*2 (for RGB1555)=480=0x1E0
134 */
135 writel(0x80100000 + 2 * x, MVEBU_LCD_CFG_GRA_PITCH);
136
137 /*
138 * Set the LCD_SPU_GRA_OVSA_HPXL_VLN Register
139 * Bits 31-16: Vertical start of graphical overlay on screen
140 * Bits 15-00: Horizontal start of graphical overlay on screen
141 */
142 writel(0x00000000, MVEBU_LCD_SPU_GRA_OVSA_HPXL_VLN);
143
144 /*
145 * Set the LCD_SPU_GRA_HPXL_VLN Register
146 * Bits 31-16: Vertical size of graphical overlay 320=0x140
147 * Bits 15-00: Horizontal size of graphical overlay 240=0xF0
148 * Values before zooming
149 */
150 writel((y << 16) | x, MVEBU_LCD_SPU_GRA_HPXL_VLN);
151
152 /*
153 * Set the LCD_SPU_GZM_HPXL_VLN Register
154 * Bits 31-16: Vertical size of graphical overlay 320=0x140
155 * Bits 15-00: Horizontal size of graphical overlay 240=0xF0
156 * Values after zooming
157 */
158 writel((y << 16) | x, MVEBU_LCD_SPU_GZM_HPXL_VLN);
159
160 /*
161 * Set the LCD_SPU_HWC_OVSA_HPXL_VLN Register
162 * Bits 31-16: Vertical position of HW Cursor 320=0x140
163 * Bits 15-00: Horizontal position of HW Cursor 240=0xF0
164 */
165 writel((y << 16) | x, MVEBU_LCD_SPU_HWC_OVSA_HPXL_VLN);
166
167 /*
168 * Set the LCD_SPU_HWC_OVSA_HPXL_VLN Register
169 * Bits 31-16: Vertical size of HW Cursor
170 * Bits 15-00: Horizontal size of HW Cursor
171 */
172 writel(0x00000000, MVEBU_LCD_SPU_HWC_HPXL_VLN);
173
174 /*
175 * Set the LCD_SPU_HWC_OVSA_HPXL_VLN Register
176 * Bits 31-16: Screen total vertical lines:
177 * VSYNC = 1
178 * Vertical Front Porch = 2
179 * Vertical Lines = 320
180 * Vertical Back Porch = 2
181 * SUM = 325 = 0x0145
182 * Bits 15-00: Screen total horizontal pixels:
183 * HSYNC = 1
184 * Horizontal Front Porch = 44
185 * Horizontal Lines = 240
186 * Horizontal Back Porch = 2
187 * SUM = 287 = 0x011F
188 * Note: For the display the backporch is between SYNC and
189 * the start of the pixels.
190 * This is not certain for the Marvell (!?)
191 */
192 val = ((y + lcd_info->y_fp + lcd_info->y_bp + 1) << 16) |
193 (x + lcd_info->x_fp + lcd_info->x_bp + 1);
194 writel(val, MVEBU_LCD_SPUT_V_H_TOTAL);
195
196 /*
197 * Set the LCD_SPU_V_H_ACTIVE Register
198 * Bits 31-16: Screen active vertical lines 320=0x140
199 * Bits 15-00: Screen active horizontakl pixels 240=0x00F0
200 */
201 writel((y << 16) | x, MVEBU_LCD_SPU_V_H_ACTIVE);
202
203 /*
204 * Set the LCD_SPU_H_PORCH Register
205 * Bits 31-16: Screen horizontal backporch 44=0x2c
206 * Bits 15-00: Screen horizontal frontporch 2=0x02
207 * Note: The terms "front" and "back" for the Marvell seem to be
208 * exactly opposite to the display.
209 */
210 writel((lcd_info->x_fp << 16) | lcd_info->x_bp, MVEBU_LCD_SPU_H_PORCH);
211
212 /*
213 * Set the LCD_SPU_V_PORCH Register
214 * Bits 31-16: Screen vertical backporch 2=0x02
215 * Bits 15-00: Screen vertical frontporch 2=0x02
216 * Note: The terms "front" and "back" for the Marvell seem to be exactly
217 * opposite to the display.
218 */
219 writel((lcd_info->y_fp << 16) | lcd_info->y_bp, MVEBU_LCD_SPU_V_PORCH);
220
221 /*
222 * Set the LCD_SPU_BLANKCOLOR Register
223 * This should be black = 0
224 * For tests this is magenta=00FF00FF
225 */
226 writel(0x00FF00FF, MVEBU_LCD_SPU_BLANKCOLOR);
227
228 /*
229 * Registers in the range of 0x0128 to 0x012C are colors for the cursor
230 * Registers in the range of 0x0130 to 0x0138 are colors for video
231 * color keying
232 */
233
234 /*
235 * Set the LCD_SPU_RDREG4F Register
236 * Bits 31-12: Reservd
237 * Bit 11: SRAM Wait
238 * Bit 10: Smart display fast TX (must be 1)
239 * Bit 9: DMA Arbitration Video/Graphics overlay: 0=interleaved
240 * Bit 8: FIFO watermark for DMA: 0=disable
241 * Bits 07-00: Empty 8B FIFO entries to trigger DMA, default=0x80
242 */
243 writel(0x00000780, MVEBU_LCD_CFG_RDREG4F);
244
245 /*
246 * Set the LCD_SPU_DMACTRL 0 Register
247 * Bit 31: Disable overlay blending 1=disable
248 * Bit 30: Gamma correction enable, 0=disable
249 * Bit 29: Video Contrast/Saturation/Hue Adjust enable, 0=disable
250 * Bit 28: Color palette enable, 0=disable
251 * Bit 27: DMA AXI Arbiter, 1=default
252 * Bit 26: HW Cursor 1-bit mode
253 * Bit 25: HW Cursor or 1- or 2-bit mode
254 * Bit 24: HW Cursor enabled, 0=disable
255 * Bits 23-20: Graphics Memory Color Format: 0x1=RGB1555
256 * Bits 19-16: Video Memory Color Format: 0x1=RGB1555
257 * Bit 15: Memory Toggle between frame 0 and 1: 0=disable
258 * Bit 14: Graphics horizontal scaling enable: 0=disable
259 * Bit 13: Graphics test mode: 0=disable
260 * Bit 12: Graphics SWAP R and B: 0=disable
261 * Bit 11: Graphics SWAP U and V: 0=disable
262 * Bit 10: Graphics SWAP Y and U/V: 0=disable
263 * Bit 09: Graphic YUV to RGB Conversion: 0=disable
264 * Bit 08: Graphic Transfer: 1=enable
265 * Bit 07: Memory Toggle: 0=disable
266 * Bit 06: Video horizontal scaling enable: 0=disable
267 * Bit 05: Video test mode: 0=disable
268 * Bit 04: Video SWAP R and B: 0=disable
269 * Bit 03: Video SWAP U and V: 0=disable
270 * Bit 02: Video SWAP Y and U/V: 0=disable
271 * Bit 01: Video YUV to RGB Conversion: 0=disable
272 * Bit 00: Video Transfer: 0=disable
273 */
274 writel(0x88111100, MVEBU_LCD_SPU_DMA_CTRL0);
275
276 /*
277 * Set the LCD_SPU_DMA_CTRL1 Register
278 * Bit 31: Manual DMA Trigger = 0
279 * Bits 30-28: DMA Trigger Source: 0x2 VSYNC
280 * Bit 28: VSYNC_INV: 0=Rising Edge, 1=Falling Edge
281 * Bits 26-24: Color Key Mode: 0=disable
282 * Bit 23: Fill low bits: 0=fill with zeroes
283 * Bit 22: Reserved
284 * Bit 21: Gated Clock: 0=disable
285 * Bit 20: Power Save enable: 0=disable
286 * Bits 19-18: Reserved
287 * Bits 17-16: Configure Video/Graphic Path: 0x1: Graphic path alpha.
288 * Bits 15-08: Configure Alpha: 0x00.
289 * Bits 07-00: Reserved.
290 */
291 writel(0x20010000, MVEBU_LCD_SPU_DMA_CTRL1);
292
293 /*
294 * Set the LCD_SPU_SRAM_CTRL Register
295 * Reset to default = 0000C000
296 * Bits 15-14: SRAM control: init=0x3, Read=0, Write=2
297 * Bits 11-08: SRAM address ID: 0=gamma_yr, 1=gammy_ug, 2=gamma_vb,
298 * 3=palette, 15=cursor
299 */
300 writel(0x0000C000, MVEBU_LCD_SPU_SRAM_CTRL);
301
302 /*
303 * LCD_SPU_SRAM_WRDAT register: 019C
304 * LCD_SPU_SRAM_PARA0 register: 01A0
305 * LCD_SPU_SRAM_PARA1 register: 01A4 - Cursor control/Power settings
306 */
307 writel(0x00000000, MVEBU_LCD_SPU_SRAM_PARA1);
308
309
310 /* Clock settings in the at 01A8 and in the range F0A0 see below */
311
312 /*
313 * Set LCD_SPU_CONTRAST
314 * Bits 31-16: Brightness sign ext. 8-bit value +255 to -255: default=0
315 * Bits 15-00: Contrast sign ext. 8-bit value +255 to -255: default=0
316 */
317 writel(0x00000000, MVEBU_LCD_SPU_CONTRAST);
318
319 /*
320 * Set LCD_SPU_SATURATION
321 * Bits 31-16: Multiplier signed 4.12 fixed point value
322 * Bits 15-00: Saturation signed 4.12 fixed point value
323 */
324 writel(0x10001000, MVEBU_LCD_SPU_SATURATION);
325
326 /*
327 * Set LCD_SPU_HUE
328 * Bits 31-16: Sine signed 2.14 fixed point value
329 * Bits 15-00: Cosine signed 2.14 fixed point value
330 */
331 writel(0x00000000, MVEBU_LCD_SPU_CBSH_HUE);
332
333 /*
334 * Set LCD_SPU_DUMB_CTRL
335 * Bits 31-28: LCD Type: 3=18 bit RGB | 6=24 bit RGB888
336 * Bits 27-12: Reserved
337 * Bit 11: LCD DMA Pipeline Enable: 1=Enable
338 * Bits 10-09: Reserved
339 * Bit 8: LCD GPIO pin (??)
340 * Bit 7: Reverse RGB
341 * Bit 6: Invert composite blank signal DE/EN (??)
342 * Bit 5: Invert composite sync signal
343 * Bit 4: Invert Pixel Valid Enable DE/EN (??)
344 * Bit 3: Invert VSYNC
345 * Bit 2: Invert HSYNC
346 * Bit 1: Invert Pixel Clock
347 * Bit 0: Enable LCD Panel: 1=Enable
348 * Question: Do we have to disable Smart and Dumb LCD
349 * and separately enable LVDS?
350 */
351 writel(0x6000080F, MVEBU_LCD_SPU_DUMB_CTRL);
352
353 /*
354 * Set LCD_SPU_IOPAD_CTRL
355 * Bits 31-20: Reserved
356 * Bits 19-18: Vertical Interpolation: 0=Disable
357 * Bits 17-16: Reserved
358 * Bit 15: Graphics Vertical Mirror enable: 0=disable
359 * Bit 14: Reserved
360 * Bit 13: Video Vertical Mirror enable: 0=disable
361 * Bit 12: Reserved
362 * Bit 11: Command Vertical Mirror enable: 0=disable
363 * Bit 10: Reserved
364 * Bits 09-08: YUV to RGB Color space conversion: 0 (Not used)
365 * Bits 07-04: AXI Bus Master: 0x4: no crossing of 4k boundary,
366 * 128 Bytes burst
367 * Bits 03-00: LCD pins: ??? 0=24-bit Dump panel ??
368 */
369 writel(0x000000C0, MVEBU_LCD_SPU_IOPAD_CONTROL);
370
371 /*
372 * Set SUP_IRQ_ENA_2: Disable all interrupts
373 */
374 writel(0x00000000, MVEBU_LCD_SPU_IRQ_ENA_2);
375
376 /*
377 * Set SUP_IRQ_ENA: Disable all interrupts.
378 */
379 writel(0x00000000, MVEBU_LCD_SPU_IRQ_ENA);
380
381 /*
382 * Set up ADDL Control Register
383 * Bits 31-29: 0x0 = Fastest Delay Line (default)
384 * 0x3 = Slowest Delay Line (default)
385 * Bit 28: Calibration done status.
386 * Bit 27: Reserved
387 * Bit 26: Set Pixel Clock to ADDL output
388 * Bit 25: Reduce CAL Enable
389 * Bits 24-22: Manual calibration value.
390 * Bit 21: Manual calibration enable.
391 * Bit 20: Restart Auto Cal
392 * Bits 19-16: Calibration Threshold voltage, default= 0x2
393 * Bite 15-14: Reserved
394 * Bits 13-11: Divisor for ADDL Clock: 0x1=/2, 0x3=/8, 0x5=/16
395 * Bit 10: Power Down ADDL module, default = 1!
396 * Bits 09-08: Test point configuration: 0x2=Bias, 0x3=High-z
397 * Bit 07: Reset ADDL
398 * Bit 06: Invert ADLL Clock
399 * Bits 05-00: Delay taps, 0x3F=Half Cycle, 0x00=No delay
400 * Note: ADLL is used for a VGA interface with DAC - not used here
401 */
402 writel(0x00000000, MVEBU_LCD_ADLL_CTRL);
403
404 /*
405 * Set the LCD_CLK_DIS Register:
406 * Bits 3 and 4 must be 1
407 */
408 writel(0x00000018, MVEBU_LCD_CLK_DIS);
409
410 /*
411 * Set the LCD_VGA_HSYNC/VSYNC Delay Register:
412 * Bits 03-00: Sets the delay for the HSYNC and VSYNC signals
413 */
414 writel(0x00000000, MVEBU_LCD_VGA_HVSYNC_DELAY);
415
416 /*
417 * Clock registers
418 * See page 475 in the functional spec.
419 */
420
421 /* Step 1 and 2: Disable the PLL */
422
423 /*
424 * Disable PLL, see "LCD Clock Configuration 1 Register" below
425 */
426 writel(0x8FF40007, MVEBU_LCD_CLK_CFG_1);
427
428 /*
429 * Powerdown, see "LCD Clock Configuration 0 Register" below
430 */
431 writel(0x94000174, MVEBU_LCD_CLK_CFG_0);
432
433 /*
434 * Set the LCD_CFG_SCLK_DIV Register
435 * This is set fix to 0x40000001 for the LVDS output:
436 * Bits 31-30: SCLCK Source: 0=AXIBus, 1=AHBus, 2=PLLDivider0
437 * Bits 15-01: Clock Divider: Bypass for LVDS=0x0001
438 * See page 475 in section 28.5.
439 */
440 writel(0x80000001, MVEBU_LCD_CFG_SCLK_DIV);
441
442 /*
443 * Set the LCD Clock Configuration 0 Register:
444 * Bit 31: Powerdown: 0=Power up
445 * Bits 30-29: Reserved
446 * Bits 28-26: PLL_KDIV: This encodes K
447 * K=16 => 0x5
448 * Bits 25-17: PLL_MDIV: This is M-1:
449 * M=1 => 0x0
450 * Bits 16-13: VCO band: 0x1 for 700-920MHz
451 * Bits 12-04: PLL_NDIV: This is N-1 and corresponds to R1_CTRL!
452 * N=28=0x1C => 0x1B
453 * Bits 03-00: R1_CTRL (for N=28 => 0x4)
454 */
455 writel(0x940021B4, MVEBU_LCD_CLK_CFG_0);
456
457 /*
458 * Set the LCD Clock Configuration 1 Register:
459 * Bits 31-19: Reserved
460 * Bit 18: Select PLL: Core PLL, 1=Dedicated PPL
461 * Bit 17: Clock Output Enable: 0=disable, 1=enable
462 * Bit 16: Select RefClk: 0=RefClk (25MHz), 1=External
463 * Bit 15: Half-Div, Device Clock by DIV+0.5*Half-Dev
464 * Bits 14-13: Reserved
465 * Bits 12-00: PLL Full Divider [Note: Assumed to be the Post-Divider
466 * M' for LVDS=7!]
467 */
468 writel(0x8FF40007, MVEBU_LCD_CLK_CFG_1);
469
470 /*
471 * Set the LVDS Clock Configuration Register:
472 * Bit 31: Clock Gating for the input clock to the LVDS
473 * Bit 30: LVDS Serializer enable: 1=Enabled
474 * Bits 29-11: Reserved
475 * Bit 11-08: LVDS Clock delay: 0x02 (default): by 2 pixel clock/7
476 * Bits 07-02: Reserved
477 * Bit 01: 24bbp Option: 0=Option_1,1=Option2
478 * Bit 00: 1=24bbp Panel: 0=18bpp Panel
479 * Note: Bits 0 and must be verified with the help of the
480 * Interface/display
481 */
482 writel(0xC0000201, MVEBU_LCD_LVDS_CLK_CFG);
483
484 /*
485 * Power up PLL (Clock Config 0)
486 */
487 writel(0x140021B4, MVEBU_LCD_CLK_CFG_0);
488
489 /* wait 10 ms */
490 mdelay(10);
491
492 /*
493 * Enable PLL (Clock Config 1)
494 */
495 writel(0x8FF60007, MVEBU_LCD_CLK_CFG_1);
496
497 return 0;
498 }
499
board_video_init(void)500 int __weak board_video_init(void)
501 {
502 return -1;
503 }
504
video_hw_init(void)505 void *video_hw_init(void)
506 {
507 static GraphicDevice mvebufb;
508 GraphicDevice *pGD = &mvebufb;
509 u32 val;
510
511 /*
512 * The board code needs to call mvebu_lcd_register_init()
513 * in its board_video_init() implementation, with the board
514 * specific parameters for its LCD.
515 */
516 if (board_video_init() || !readl(MVEBU_LCD_CFG_GRA_START_ADDR0))
517 return NULL;
518
519 /* Provide the necessary values for the U-Boot video IF */
520 val = readl(MVEBU_LCD_SPU_V_H_ACTIVE);
521 pGD->winSizeY = val >> 16;
522 pGD->winSizeX = val & 0x0000ffff;
523 pGD->gdfBytesPP = 2;
524 pGD->gdfIndex = GDF_15BIT_555RGB;
525 pGD->frameAdrs = readl(MVEBU_LCD_CFG_GRA_START_ADDR0);
526
527 debug("LCD: buffer at 0x%08x resolution %dx%d\n", pGD->frameAdrs,
528 pGD->winSizeX, pGD->winSizeY);
529
530 return pGD;
531 }
532