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Commit | Line | Data |
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913d1be2 SR |
1 | /* |
2 | * Video driver for Marvell Armada XP SoC | |
3 | * | |
4 | * Initialization of LCD interface and setup of SPLASH screen image | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.0+ | |
7 | */ | |
8 | ||
9 | #include <common.h> | |
10 | #include <video_fb.h> | |
11 | #include <linux/mbus.h> | |
12 | #include <asm/io.h> | |
13 | #include <asm/arch/cpu.h> | |
14 | #include <asm/arch/soc.h> | |
15 | ||
16 | #define MVEBU_LCD_WIN_CONTROL(w) (MVEBU_LCD_BASE + 0xf000 + ((w) << 4)) | |
17 | #define MVEBU_LCD_WIN_BASE(w) (MVEBU_LCD_BASE + 0xf004 + ((w) << 4)) | |
18 | #define MVEBU_LCD_WIN_REMAP(w) (MVEBU_LCD_BASE + 0xf00c + ((w) << 4)) | |
19 | ||
20 | #define MVEBU_LCD_CFG_DMA_START_ADDR_0 (MVEBU_LCD_BASE + 0x00cc) | |
21 | #define MVEBU_LCD_CFG_DMA_START_ADDR_1 (MVEBU_LCD_BASE + 0x00dc) | |
22 | ||
23 | #define MVEBU_LCD_CFG_GRA_START_ADDR0 (MVEBU_LCD_BASE + 0x00f4) | |
24 | #define MVEBU_LCD_CFG_GRA_START_ADDR1 (MVEBU_LCD_BASE + 0x00f8) | |
25 | #define MVEBU_LCD_CFG_GRA_PITCH (MVEBU_LCD_BASE + 0x00fc) | |
26 | #define MVEBU_LCD_SPU_GRA_OVSA_HPXL_VLN (MVEBU_LCD_BASE + 0x0100) | |
27 | #define MVEBU_LCD_SPU_GRA_HPXL_VLN (MVEBU_LCD_BASE + 0x0104) | |
28 | #define MVEBU_LCD_SPU_GZM_HPXL_VLN (MVEBU_LCD_BASE + 0x0108) | |
29 | #define MVEBU_LCD_SPU_HWC_OVSA_HPXL_VLN (MVEBU_LCD_BASE + 0x010c) | |
30 | #define MVEBU_LCD_SPU_HWC_HPXL_VLN (MVEBU_LCD_BASE + 0x0110) | |
31 | #define MVEBU_LCD_SPUT_V_H_TOTAL (MVEBU_LCD_BASE + 0x0114) | |
32 | #define MVEBU_LCD_SPU_V_H_ACTIVE (MVEBU_LCD_BASE + 0x0118) | |
33 | #define MVEBU_LCD_SPU_H_PORCH (MVEBU_LCD_BASE + 0x011c) | |
34 | #define MVEBU_LCD_SPU_V_PORCH (MVEBU_LCD_BASE + 0x0120) | |
35 | #define MVEBU_LCD_SPU_BLANKCOLOR (MVEBU_LCD_BASE + 0x0124) | |
36 | #define MVEBU_LCD_SPU_ALPHA_COLOR1 (MVEBU_LCD_BASE + 0x0128) | |
37 | #define MVEBU_LCD_SPU_ALPHA_COLOR2 (MVEBU_LCD_BASE + 0x012c) | |
38 | #define MVEBU_LCD_SPU_COLORKEY_Y (MVEBU_LCD_BASE + 0x0130) | |
39 | #define MVEBU_LCD_SPU_COLORKEY_U (MVEBU_LCD_BASE + 0x0134) | |
40 | #define MVEBU_LCD_SPU_COLORKEY_V (MVEBU_LCD_BASE + 0x0138) | |
41 | #define MVEBU_LCD_CFG_RDREG4F (MVEBU_LCD_BASE + 0x013c) | |
42 | #define MVEBU_LCD_SPU_SPI_RXDATA (MVEBU_LCD_BASE + 0x0140) | |
43 | #define MVEBU_LCD_SPU_ISA_RXDATA (MVEBU_LCD_BASE + 0x0144) | |
44 | #define MVEBU_LCD_SPU_DBG_ISA (MVEBU_LCD_BASE + 0x0148) | |
45 | ||
46 | #define MVEBU_LCD_SPU_HWC_RDDAT (MVEBU_LCD_BASE + 0x0158) | |
47 | #define MVEBU_LCD_SPU_GAMMA_RDDAT (MVEBU_LCD_BASE + 0x015c) | |
48 | #define MVEBU_LCD_SPU_PALETTE_RDDAT (MVEBU_LCD_BASE + 0x0160) | |
49 | #define MVEBU_LCD_SPU_IOPAD_IN (MVEBU_LCD_BASE + 0x0178) | |
50 | #define MVEBU_LCD_FRAME_COUNT (MVEBU_LCD_BASE + 0x017c) | |
51 | #define MVEBU_LCD_SPU_DMA_CTRL0 (MVEBU_LCD_BASE + 0x0190) | |
52 | #define MVEBU_LCD_SPU_DMA_CTRL1 (MVEBU_LCD_BASE + 0x0194) | |
53 | #define MVEBU_LCD_SPU_SRAM_CTRL (MVEBU_LCD_BASE + 0x0198) | |
54 | #define MVEBU_LCD_SPU_SRAM_WRDAT (MVEBU_LCD_BASE + 0x019c) | |
55 | #define MVEBU_LCD_SPU_SRAM_PARA0 (MVEBU_LCD_BASE + 0x01a0) | |
56 | #define MVEBU_LCD_SPU_SRAM_PARA1 (MVEBU_LCD_BASE + 0x01a4) | |
57 | #define MVEBU_LCD_CFG_SCLK_DIV (MVEBU_LCD_BASE + 0x01a8) | |
58 | #define MVEBU_LCD_SPU_CONTRAST (MVEBU_LCD_BASE + 0x01ac) | |
59 | #define MVEBU_LCD_SPU_SATURATION (MVEBU_LCD_BASE + 0x01b0) | |
60 | #define MVEBU_LCD_SPU_CBSH_HUE (MVEBU_LCD_BASE + 0x01b4) | |
61 | #define MVEBU_LCD_SPU_DUMB_CTRL (MVEBU_LCD_BASE + 0x01b8) | |
62 | #define MVEBU_LCD_SPU_IOPAD_CONTROL (MVEBU_LCD_BASE + 0x01bc) | |
63 | #define MVEBU_LCD_SPU_IRQ_ENA_2 (MVEBU_LCD_BASE + 0x01d8) | |
64 | #define MVEBU_LCD_SPU_IRQ_ISR_2 (MVEBU_LCD_BASE + 0x01dc) | |
65 | #define MVEBU_LCD_SPU_IRQ_ENA (MVEBU_LCD_BASE + 0x01c0) | |
66 | #define MVEBU_LCD_SPU_IRQ_ISR (MVEBU_LCD_BASE + 0x01c4) | |
67 | #define MVEBU_LCD_ADLL_CTRL (MVEBU_LCD_BASE + 0x01c8) | |
68 | #define MVEBU_LCD_CLK_DIS (MVEBU_LCD_BASE + 0x01cc) | |
69 | #define MVEBU_LCD_VGA_HVSYNC_DELAY (MVEBU_LCD_BASE + 0x01d4) | |
70 | #define MVEBU_LCD_CLK_CFG_0 (MVEBU_LCD_BASE + 0xf0a0) | |
71 | #define MVEBU_LCD_CLK_CFG_1 (MVEBU_LCD_BASE + 0xf0a4) | |
72 | #define MVEBU_LCD_LVDS_CLK_CFG (MVEBU_LCD_BASE + 0xf0ac) | |
73 | ||
74 | #define MVEBU_LVDS_PADS_REG (MVEBU_SYSTEM_REG_BASE + 0xf0) | |
75 | ||
76 | /* Setup Mbus Bridge Windows for LCD */ | |
77 | static void mvebu_lcd_conf_mbus_registers(void) | |
78 | { | |
79 | const struct mbus_dram_target_info *dram; | |
80 | int i; | |
81 | ||
82 | dram = mvebu_mbus_dram_info(); | |
83 | ||
84 | /* Disable windows, set size/base/remap to 0 */ | |
85 | for (i = 0; i < 6; i++) { | |
86 | writel(0, MVEBU_LCD_WIN_CONTROL(i)); | |
87 | writel(0, MVEBU_LCD_WIN_BASE(i)); | |
88 | writel(0, MVEBU_LCD_WIN_REMAP(i)); | |
89 | } | |
90 | ||
91 | /* Write LCD bridge window registers */ | |
92 | for (i = 0; i < dram->num_cs; i++) { | |
93 | const struct mbus_dram_window *cs = dram->cs + i; | |
94 | writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) | | |
95 | (dram->mbus_dram_target_id << 4) | 1, | |
96 | MVEBU_LCD_WIN_CONTROL(i)); | |
97 | ||
98 | writel(cs->base & 0xffff0000, MVEBU_LCD_WIN_BASE(i)); | |
99 | } | |
100 | } | |
101 | ||
102 | /* Initialize LCD registers */ | |
103 | int mvebu_lcd_register_init(struct mvebu_lcd_info *lcd_info) | |
104 | { | |
105 | /* Local variable for easier handling */ | |
106 | int x = lcd_info->x_res; | |
107 | int y = lcd_info->y_res; | |
108 | u32 val; | |
109 | ||
110 | /* Setup Mbus Bridge Windows */ | |
111 | mvebu_lcd_conf_mbus_registers(); | |
112 | ||
113 | /* | |
114 | * Set LVDS Pads Control Register | |
115 | * wr 0 182F0 FFE00000 | |
116 | */ | |
117 | clrbits_le32(MVEBU_LVDS_PADS_REG, 0x1f << 16); | |
118 | ||
119 | /* | |
120 | * Set the LCD_CFG_GRA_START_ADDR0/1 Registers | |
121 | * This is supposed to point to the "physical" memory at memory | |
122 | * end (currently 1GB-64MB but also may be 2GB-64MB). | |
123 | * See also the Window 0 settings! | |
124 | */ | |
125 | writel(lcd_info->fb_base, MVEBU_LCD_CFG_GRA_START_ADDR0); | |
126 | writel(lcd_info->fb_base, MVEBU_LCD_CFG_GRA_START_ADDR1); | |
127 | ||
128 | /* | |
129 | * Set the LCD_CFG_GRA_PITCH Register | |
130 | * Bits 31-28: Duty Cycle of Backlight. value/16=High (0x8=Mid Setting) | |
131 | * Bits 25-16: Backlight divider from 32kHz Clock | |
132 | * (here 16=0x10 for 1kHz) | |
133 | * Bits 15-00: Line Length in Bytes | |
134 | * 240*2 (for RGB1555)=480=0x1E0 | |
135 | */ | |
136 | writel(0x80100000 + 2 * x, MVEBU_LCD_CFG_GRA_PITCH); | |
137 | ||
138 | /* | |
139 | * Set the LCD_SPU_GRA_OVSA_HPXL_VLN Register | |
140 | * Bits 31-16: Vertical start of graphical overlay on screen | |
141 | * Bits 15-00: Horizontal start of graphical overlay on screen | |
142 | */ | |
143 | writel(0x00000000, MVEBU_LCD_SPU_GRA_OVSA_HPXL_VLN); | |
144 | ||
145 | /* | |
146 | * Set the LCD_SPU_GRA_HPXL_VLN Register | |
147 | * Bits 31-16: Vertical size of graphical overlay 320=0x140 | |
148 | * Bits 15-00: Horizontal size of graphical overlay 240=0xF0 | |
149 | * Values before zooming | |
150 | */ | |
151 | writel((y << 16) | x, MVEBU_LCD_SPU_GRA_HPXL_VLN); | |
152 | ||
153 | /* | |
154 | * Set the LCD_SPU_GZM_HPXL_VLN Register | |
155 | * Bits 31-16: Vertical size of graphical overlay 320=0x140 | |
156 | * Bits 15-00: Horizontal size of graphical overlay 240=0xF0 | |
157 | * Values after zooming | |
158 | */ | |
159 | writel((y << 16) | x, MVEBU_LCD_SPU_GZM_HPXL_VLN); | |
160 | ||
161 | /* | |
162 | * Set the LCD_SPU_HWC_OVSA_HPXL_VLN Register | |
163 | * Bits 31-16: Vertical position of HW Cursor 320=0x140 | |
164 | * Bits 15-00: Horizontal position of HW Cursor 240=0xF0 | |
165 | */ | |
166 | writel((y << 16) | x, MVEBU_LCD_SPU_HWC_OVSA_HPXL_VLN); | |
167 | ||
168 | /* | |
169 | * Set the LCD_SPU_HWC_OVSA_HPXL_VLN Register | |
170 | * Bits 31-16: Vertical size of HW Cursor | |
171 | * Bits 15-00: Horizontal size of HW Cursor | |
172 | */ | |
173 | writel(0x00000000, MVEBU_LCD_SPU_HWC_HPXL_VLN); | |
174 | ||
175 | /* | |
176 | * Set the LCD_SPU_HWC_OVSA_HPXL_VLN Register | |
177 | * Bits 31-16: Screen total vertical lines: | |
178 | * VSYNC = 1 | |
179 | * Vertical Front Porch = 2 | |
180 | * Vertical Lines = 320 | |
181 | * Vertical Back Porch = 2 | |
182 | * SUM = 325 = 0x0145 | |
183 | * Bits 15-00: Screen total horizontal pixels: | |
184 | * HSYNC = 1 | |
185 | * Horizontal Front Porch = 44 | |
186 | * Horizontal Lines = 240 | |
187 | * Horizontal Back Porch = 2 | |
188 | * SUM = 287 = 0x011F | |
189 | * Note: For the display the backporch is between SYNC and | |
190 | * the start of the pixels. | |
191 | * This is not certain for the Marvell (!?) | |
192 | */ | |
193 | val = ((y + lcd_info->y_fp + lcd_info->y_bp + 1) << 16) | | |
194 | (x + lcd_info->x_fp + lcd_info->x_bp + 1); | |
195 | writel(val, MVEBU_LCD_SPUT_V_H_TOTAL); | |
196 | ||
197 | /* | |
198 | * Set the LCD_SPU_V_H_ACTIVE Register | |
199 | * Bits 31-16: Screen active vertical lines 320=0x140 | |
200 | * Bits 15-00: Screen active horizontakl pixels 240=0x00F0 | |
201 | */ | |
202 | writel((y << 16) | x, MVEBU_LCD_SPU_V_H_ACTIVE); | |
203 | ||
204 | /* | |
205 | * Set the LCD_SPU_H_PORCH Register | |
206 | * Bits 31-16: Screen horizontal backporch 44=0x2c | |
207 | * Bits 15-00: Screen horizontal frontporch 2=0x02 | |
208 | * Note: The terms "front" and "back" for the Marvell seem to be | |
209 | * exactly opposite to the display. | |
210 | */ | |
211 | writel((lcd_info->x_fp << 16) | lcd_info->x_bp, MVEBU_LCD_SPU_H_PORCH); | |
212 | ||
213 | /* | |
214 | * Set the LCD_SPU_V_PORCH Register | |
215 | * Bits 31-16: Screen vertical backporch 2=0x02 | |
216 | * Bits 15-00: Screen vertical frontporch 2=0x02 | |
217 | * Note: The terms "front" and "back" for the Marvell seem to be exactly | |
218 | * opposite to the display. | |
219 | */ | |
220 | writel((lcd_info->y_fp << 16) | lcd_info->y_bp, MVEBU_LCD_SPU_V_PORCH); | |
221 | ||
222 | /* | |
223 | * Set the LCD_SPU_BLANKCOLOR Register | |
224 | * This should be black = 0 | |
225 | * For tests this is magenta=00FF00FF | |
226 | */ | |
227 | writel(0x00FF00FF, MVEBU_LCD_SPU_BLANKCOLOR); | |
228 | ||
229 | /* | |
230 | * Registers in the range of 0x0128 to 0x012C are colors for the cursor | |
231 | * Registers in the range of 0x0130 to 0x0138 are colors for video | |
232 | * color keying | |
233 | */ | |
234 | ||
235 | /* | |
236 | * Set the LCD_SPU_RDREG4F Register | |
237 | * Bits 31-12: Reservd | |
238 | * Bit 11: SRAM Wait | |
239 | * Bit 10: Smart display fast TX (must be 1) | |
240 | * Bit 9: DMA Arbitration Video/Graphics overlay: 0=interleaved | |
241 | * Bit 8: FIFO watermark for DMA: 0=disable | |
242 | * Bits 07-00: Empty 8B FIFO entries to trigger DMA, default=0x80 | |
243 | */ | |
244 | writel(0x00000780, MVEBU_LCD_CFG_RDREG4F); | |
245 | ||
246 | /* | |
247 | * Set the LCD_SPU_DMACTRL 0 Register | |
248 | * Bit 31: Disable overlay blending 1=disable | |
249 | * Bit 30: Gamma correction enable, 0=disable | |
250 | * Bit 29: Video Contrast/Saturation/Hue Adjust enable, 0=disable | |
251 | * Bit 28: Color palette enable, 0=disable | |
252 | * Bit 27: DMA AXI Arbiter, 1=default | |
253 | * Bit 26: HW Cursor 1-bit mode | |
254 | * Bit 25: HW Cursor or 1- or 2-bit mode | |
255 | * Bit 24: HW Cursor enabled, 0=disable | |
256 | * Bits 23-20: Graphics Memory Color Format: 0x1=RGB1555 | |
257 | * Bits 19-16: Video Memory Color Format: 0x1=RGB1555 | |
258 | * Bit 15: Memory Toggle between frame 0 and 1: 0=disable | |
259 | * Bit 14: Graphics horizontal scaling enable: 0=disable | |
260 | * Bit 13: Graphics test mode: 0=disable | |
261 | * Bit 12: Graphics SWAP R and B: 0=disable | |
262 | * Bit 11: Graphics SWAP U and V: 0=disable | |
263 | * Bit 10: Graphics SWAP Y and U/V: 0=disable | |
264 | * Bit 09: Graphic YUV to RGB Conversion: 0=disable | |
265 | * Bit 08: Graphic Transfer: 1=enable | |
266 | * Bit 07: Memory Toggle: 0=disable | |
267 | * Bit 06: Video horizontal scaling enable: 0=disable | |
268 | * Bit 05: Video test mode: 0=disable | |
269 | * Bit 04: Video SWAP R and B: 0=disable | |
270 | * Bit 03: Video SWAP U and V: 0=disable | |
271 | * Bit 02: Video SWAP Y and U/V: 0=disable | |
272 | * Bit 01: Video YUV to RGB Conversion: 0=disable | |
273 | * Bit 00: Video Transfer: 0=disable | |
274 | */ | |
275 | writel(0x88111100, MVEBU_LCD_SPU_DMA_CTRL0); | |
276 | ||
277 | /* | |
278 | * Set the LCD_SPU_DMA_CTRL1 Register | |
279 | * Bit 31: Manual DMA Trigger = 0 | |
280 | * Bits 30-28: DMA Trigger Source: 0x2 VSYNC | |
281 | * Bit 28: VSYNC_INV: 0=Rising Edge, 1=Falling Edge | |
282 | * Bits 26-24: Color Key Mode: 0=disable | |
283 | * Bit 23: Fill low bits: 0=fill with zeroes | |
284 | * Bit 22: Reserved | |
285 | * Bit 21: Gated Clock: 0=disable | |
286 | * Bit 20: Power Save enable: 0=disable | |
287 | * Bits 19-18: Reserved | |
288 | * Bits 17-16: Configure Video/Graphic Path: 0x1: Graphic path alpha. | |
289 | * Bits 15-08: Configure Alpha: 0x00. | |
290 | * Bits 07-00: Reserved. | |
291 | */ | |
292 | writel(0x20010000, MVEBU_LCD_SPU_DMA_CTRL1); | |
293 | ||
294 | /* | |
295 | * Set the LCD_SPU_SRAM_CTRL Register | |
296 | * Reset to default = 0000C000 | |
297 | * Bits 15-14: SRAM control: init=0x3, Read=0, Write=2 | |
298 | * Bits 11-08: SRAM address ID: 0=gamma_yr, 1=gammy_ug, 2=gamma_vb, | |
299 | * 3=palette, 15=cursor | |
300 | */ | |
301 | writel(0x0000C000, MVEBU_LCD_SPU_SRAM_CTRL); | |
302 | ||
303 | /* | |
304 | * LCD_SPU_SRAM_WRDAT register: 019C | |
305 | * LCD_SPU_SRAM_PARA0 register: 01A0 | |
306 | * LCD_SPU_SRAM_PARA1 register: 01A4 - Cursor control/Power settings | |
307 | */ | |
308 | writel(0x00000000, MVEBU_LCD_SPU_SRAM_PARA1); | |
309 | ||
310 | ||
311 | /* Clock settings in the at 01A8 and in the range F0A0 see below */ | |
312 | ||
313 | /* | |
314 | * Set LCD_SPU_CONTRAST | |
315 | * Bits 31-16: Brightness sign ext. 8-bit value +255 to -255: default=0 | |
316 | * Bits 15-00: Contrast sign ext. 8-bit value +255 to -255: default=0 | |
317 | */ | |
318 | writel(0x00000000, MVEBU_LCD_SPU_CONTRAST); | |
319 | ||
320 | /* | |
321 | * Set LCD_SPU_SATURATION | |
322 | * Bits 31-16: Multiplier signed 4.12 fixed point value | |
323 | * Bits 15-00: Saturation signed 4.12 fixed point value | |
324 | */ | |
325 | writel(0x10001000, MVEBU_LCD_SPU_SATURATION); | |
326 | ||
327 | /* | |
328 | * Set LCD_SPU_HUE | |
329 | * Bits 31-16: Sine signed 2.14 fixed point value | |
330 | * Bits 15-00: Cosine signed 2.14 fixed point value | |
331 | */ | |
332 | writel(0x00000000, MVEBU_LCD_SPU_CBSH_HUE); | |
333 | ||
334 | /* | |
335 | * Set LCD_SPU_DUMB_CTRL | |
336 | * Bits 31-28: LCD Type: 3=18 bit RGB | 6=24 bit RGB888 | |
337 | * Bits 27-12: Reserved | |
338 | * Bit 11: LCD DMA Pipeline Enable: 1=Enable | |
339 | * Bits 10-09: Reserved | |
340 | * Bit 8: LCD GPIO pin (??) | |
341 | * Bit 7: Reverse RGB | |
342 | * Bit 6: Invert composite blank signal DE/EN (??) | |
343 | * Bit 5: Invert composite sync signal | |
344 | * Bit 4: Invert Pixel Valid Enable DE/EN (??) | |
345 | * Bit 3: Invert VSYNC | |
346 | * Bit 2: Invert HSYNC | |
347 | * Bit 1: Invert Pixel Clock | |
348 | * Bit 0: Enable LCD Panel: 1=Enable | |
349 | * Question: Do we have to disable Smart and Dumb LCD | |
350 | * and separately enable LVDS? | |
351 | */ | |
352 | writel(0x6000080F, MVEBU_LCD_SPU_DUMB_CTRL); | |
353 | ||
354 | /* | |
355 | * Set LCD_SPU_IOPAD_CTRL | |
356 | * Bits 31-20: Reserved | |
357 | * Bits 19-18: Vertical Interpolation: 0=Disable | |
358 | * Bits 17-16: Reserved | |
359 | * Bit 15: Graphics Vertical Mirror enable: 0=disable | |
360 | * Bit 14: Reserved | |
361 | * Bit 13: Video Vertical Mirror enable: 0=disable | |
362 | * Bit 12: Reserved | |
363 | * Bit 11: Command Vertical Mirror enable: 0=disable | |
364 | * Bit 10: Reserved | |
365 | * Bits 09-08: YUV to RGB Color space conversion: 0 (Not used) | |
366 | * Bits 07-04: AXI Bus Master: 0x4: no crossing of 4k boundary, | |
367 | * 128 Bytes burst | |
368 | * Bits 03-00: LCD pins: ??? 0=24-bit Dump panel ?? | |
369 | */ | |
370 | writel(0x000000C0, MVEBU_LCD_SPU_IOPAD_CONTROL); | |
371 | ||
372 | /* | |
373 | * Set SUP_IRQ_ENA_2: Disable all interrupts | |
374 | */ | |
375 | writel(0x00000000, MVEBU_LCD_SPU_IRQ_ENA_2); | |
376 | ||
377 | /* | |
378 | * Set SUP_IRQ_ENA: Disable all interrupts. | |
379 | */ | |
380 | writel(0x00000000, MVEBU_LCD_SPU_IRQ_ENA); | |
381 | ||
382 | /* | |
383 | * Set up ADDL Control Register | |
384 | * Bits 31-29: 0x0 = Fastest Delay Line (default) | |
385 | * 0x3 = Slowest Delay Line (default) | |
386 | * Bit 28: Calibration done status. | |
387 | * Bit 27: Reserved | |
388 | * Bit 26: Set Pixel Clock to ADDL output | |
389 | * Bit 25: Reduce CAL Enable | |
390 | * Bits 24-22: Manual calibration value. | |
391 | * Bit 21: Manual calibration enable. | |
392 | * Bit 20: Restart Auto Cal | |
393 | * Bits 19-16: Calibration Threshold voltage, default= 0x2 | |
394 | * Bite 15-14: Reserved | |
395 | * Bits 13-11: Divisor for ADDL Clock: 0x1=/2, 0x3=/8, 0x5=/16 | |
396 | * Bit 10: Power Down ADDL module, default = 1! | |
397 | * Bits 09-08: Test point configuration: 0x2=Bias, 0x3=High-z | |
398 | * Bit 07: Reset ADDL | |
399 | * Bit 06: Invert ADLL Clock | |
400 | * Bits 05-00: Delay taps, 0x3F=Half Cycle, 0x00=No delay | |
401 | * Note: ADLL is used for a VGA interface with DAC - not used here | |
402 | */ | |
403 | writel(0x00000000, MVEBU_LCD_ADLL_CTRL); | |
404 | ||
405 | /* | |
406 | * Set the LCD_CLK_DIS Register: | |
407 | * Bits 3 and 4 must be 1 | |
408 | */ | |
409 | writel(0x00000018, MVEBU_LCD_CLK_DIS); | |
410 | ||
411 | /* | |
412 | * Set the LCD_VGA_HSYNC/VSYNC Delay Register: | |
413 | * Bits 03-00: Sets the delay for the HSYNC and VSYNC signals | |
414 | */ | |
415 | writel(0x00000000, MVEBU_LCD_VGA_HVSYNC_DELAY); | |
416 | ||
417 | /* | |
418 | * Clock registers | |
419 | * See page 475 in the functional spec. | |
420 | */ | |
421 | ||
422 | /* Step 1 and 2: Disable the PLL */ | |
423 | ||
424 | /* | |
425 | * Disable PLL, see "LCD Clock Configuration 1 Register" below | |
426 | */ | |
427 | writel(0x8FF40007, MVEBU_LCD_CLK_CFG_1); | |
428 | ||
429 | /* | |
430 | * Powerdown, see "LCD Clock Configuration 0 Register" below | |
431 | */ | |
432 | writel(0x94000174, MVEBU_LCD_CLK_CFG_0); | |
433 | ||
434 | /* | |
435 | * Set the LCD_CFG_SCLK_DIV Register | |
436 | * This is set fix to 0x40000001 for the LVDS output: | |
437 | * Bits 31-30: SCLCK Source: 0=AXIBus, 1=AHBus, 2=PLLDivider0 | |
438 | * Bits 15-01: Clock Divider: Bypass for LVDS=0x0001 | |
439 | * See page 475 in section 28.5. | |
440 | */ | |
441 | writel(0x80000001, MVEBU_LCD_CFG_SCLK_DIV); | |
442 | ||
443 | /* | |
444 | * Set the LCD Clock Configuration 0 Register: | |
445 | * Bit 31: Powerdown: 0=Power up | |
446 | * Bits 30-29: Reserved | |
447 | * Bits 28-26: PLL_KDIV: This encodes K | |
448 | * K=16 => 0x5 | |
449 | * Bits 25-17: PLL_MDIV: This is M-1: | |
450 | * M=1 => 0x0 | |
451 | * Bits 16-13: VCO band: 0x1 for 700-920MHz | |
452 | * Bits 12-04: PLL_NDIV: This is N-1 and corresponds to R1_CTRL! | |
453 | * N=28=0x1C => 0x1B | |
454 | * Bits 03-00: R1_CTRL (for N=28 => 0x4) | |
455 | */ | |
456 | writel(0x940021B4, MVEBU_LCD_CLK_CFG_0); | |
457 | ||
458 | /* | |
459 | * Set the LCD Clock Configuration 1 Register: | |
460 | * Bits 31-19: Reserved | |
461 | * Bit 18: Select PLL: Core PLL, 1=Dedicated PPL | |
462 | * Bit 17: Clock Output Enable: 0=disable, 1=enable | |
463 | * Bit 16: Select RefClk: 0=RefClk (25MHz), 1=External | |
464 | * Bit 15: Half-Div, Device Clock by DIV+0.5*Half-Dev | |
465 | * Bits 14-13: Reserved | |
466 | * Bits 12-00: PLL Full Divider [Note: Assumed to be the Post-Divider | |
467 | * M' for LVDS=7!] | |
468 | */ | |
469 | writel(0x8FF40007, MVEBU_LCD_CLK_CFG_1); | |
470 | ||
471 | /* | |
472 | * Set the LVDS Clock Configuration Register: | |
473 | * Bit 31: Clock Gating for the input clock to the LVDS | |
474 | * Bit 30: LVDS Serializer enable: 1=Enabled | |
475 | * Bits 29-11: Reserved | |
476 | * Bit 11-08: LVDS Clock delay: 0x02 (default): by 2 pixel clock/7 | |
477 | * Bits 07-02: Reserved | |
478 | * Bit 01: 24bbp Option: 0=Option_1,1=Option2 | |
479 | * Bit 00: 1=24bbp Panel: 0=18bpp Panel | |
480 | * Note: Bits 0 and must be verified with the help of the | |
481 | * Interface/display | |
482 | */ | |
483 | writel(0xC0000201, MVEBU_LCD_LVDS_CLK_CFG); | |
484 | ||
485 | /* | |
486 | * Power up PLL (Clock Config 0) | |
487 | */ | |
488 | writel(0x140021B4, MVEBU_LCD_CLK_CFG_0); | |
489 | ||
490 | /* wait 10 ms */ | |
491 | mdelay(10); | |
492 | ||
493 | /* | |
494 | * Enable PLL (Clock Config 1) | |
495 | */ | |
496 | writel(0x8FF60007, MVEBU_LCD_CLK_CFG_1); | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
501 | int __weak board_video_init(void) | |
502 | { | |
503 | return -1; | |
504 | } | |
505 | ||
506 | void *video_hw_init(void) | |
507 | { | |
508 | static GraphicDevice mvebufb; | |
509 | GraphicDevice *pGD = &mvebufb; | |
510 | u32 val; | |
511 | ||
512 | /* | |
513 | * The board code needs to call mvebu_lcd_register_init() | |
514 | * in its board_video_init() implementation, with the board | |
515 | * specific parameters for its LCD. | |
516 | */ | |
517 | if (board_video_init() || !readl(MVEBU_LCD_CFG_GRA_START_ADDR0)) | |
518 | return NULL; | |
519 | ||
520 | /* Provide the necessary values for the U-Boot video IF */ | |
521 | val = readl(MVEBU_LCD_SPU_V_H_ACTIVE); | |
522 | pGD->winSizeY = val >> 16; | |
523 | pGD->winSizeX = val & 0x0000ffff; | |
524 | pGD->gdfBytesPP = 2; | |
525 | pGD->gdfIndex = GDF_15BIT_555RGB; | |
526 | pGD->frameAdrs = readl(MVEBU_LCD_CFG_GRA_START_ADDR0); | |
527 | ||
528 | debug("LCD: buffer at 0x%08x resolution %dx%d\n", pGD->frameAdrs, | |
529 | pGD->winSizeX, pGD->winSizeY); | |
530 | ||
531 | return pGD; | |
532 | } |