1 /*
2 * Copyright (c) 2006-2022, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2011-08-09 lgnq first version for LS1B DC
9 * 2015-07-06 chinesebear modified for loongson 1c
10 * 2018-01-06 sundm75 modified for smartloong
11 */
12 #include <rtthread.h>
13
14 #include "display_controller.h"
15 #include "../../libraries/ls1c_pwm.h"
16 #include "../../libraries/ls1c_public.h"
17 #include "../../libraries/ls1c_gpio.h"
18 #include "../../libraries/ls1c_pin.h"
19
20 #if (defined PKG_USING_GUIENGINE) || (defined RT_USING_RTGUI)
21 struct vga_struct vga_mode[] =
22 {
23 {/*"480x272_60.00"*/ 111000, 480, 482, 523, 525, 272, 274, 284, 286, },
24 {/*"640x480_70.00"*/ 28560, 640, 664, 728, 816, 480, 481, 484, 500, },
25 {/*"640x640_60.00"*/ 33100, 640, 672, 736, 832, 640, 641, 644, 663, },
26 {/*"640x768_60.00"*/ 39690, 640, 672, 736, 832, 768, 769, 772, 795, },
27 {/*"640x800_60.00"*/ 42130, 640, 680, 744, 848, 800, 801, 804, 828, },
28 {/*"800x480_70.00"*/ 35840, 800, 832, 912, 1024, 480, 481, 484, 500, },
29 {/*"800x600_60.00"*/ 38220, 800, 832, 912, 1024, 600, 601, 604, 622, },
30 {/*"800x640_60.00"*/ 40730, 800, 832, 912, 1024, 640, 641, 644, 663, },
31 {/*"832x600_60.00"*/ 40010, 832, 864, 952, 1072, 600, 601, 604, 622, },
32 {/*"832x608_60.00"*/ 40520, 832, 864, 952, 1072, 608, 609, 612, 630, },
33 {/*"1024x480_60.00"*/ 38170, 1024, 1048, 1152, 1280, 480, 481, 484, 497, },
34 {/*"1024x600_60.00"*/ 48960, 1024, 1064, 1168, 1312, 600, 601, 604, 622, },
35 {/*"1024x640_60.00"*/ 52830, 1024, 1072, 1176, 1328, 640, 641, 644, 663, },
36 {/*"1024x768_60.00"*/ 64110, 1024, 1080, 1184, 1344, 768, 769, 772, 795, },
37 {/*"1152x764_60.00"*/ 71380, 1152, 1208, 1328, 1504, 764, 765, 768, 791, },
38 {/*"1280x800_60.00"*/ 83460, 1280, 1344, 1480, 1680, 800, 801, 804, 828, },
39 {/*"1280x1024_55.00"*/ 98600, 1280, 1352, 1488, 1696, 1024, 1025, 1028, 1057, },
40 {/*"1440x800_60.00"*/ 93800, 1440, 1512, 1664, 1888, 800, 801, 804, 828, },
41 {/*"1440x900_67.00"*/ 120280, 1440, 1528, 1680, 1920, 900, 901, 904, 935, },
42 };
43
44 static volatile int fb_index = 0;
45
46 rt_align(16)
47 volatile rt_uint16_t _rt_framebuffer[FB_YSIZE][FB_XSIZE];
48 volatile rt_uint16_t _rt_framebuffer0[FB_YSIZE][FB_XSIZE];
49 volatile rt_uint16_t _rt_framebuffer1[FB_YSIZE][FB_XSIZE];
50 static struct rt_device_graphic_info _dc_info;
51
pwminit(void)52 static void pwminit(void)
53 {
54 pwm_info_t pwm_info;
55 pwm_info.gpio = LS1C_PWM0_GPIO06; // pwm引脚位gpio06
56 pwm_info.mode = PWM_MODE_NORMAL; // 正常模式--连续输出pwm波形
57 pwm_info.duty = 0.85; // pwm占空比 85%
58 pwm_info.period_ns = 5*1000*1000; // pwm周期5ms
59
60 /*pwm初始化，初始化后立即产生pwm波形*/
61 pwm_init(&pwm_info);
62
63 /* 使能pwm */
64 pwm_enable(&pwm_info);
65 }
caclulate_freq(rt_uint32_t XIN,rt_uint32_t PCLK)66 int caclulate_freq(rt_uint32_t XIN, rt_uint32_t PCLK)
67 {
68 rt_uint32_t divider_int;
69 rt_uint32_t needed_pixclk;
70 rt_uint32_t pll_clk, pix_div;
71 rt_uint32_t regval;
72
73
74 pll_clk = PLL_FREQ; // 读CPU的 PLL及SDRAM 分频系数
75 pll_clk =( pll_clk>>8 )& 0xff;
76 pll_clk = XIN * pll_clk / 4 ;
77 pix_div = PLL_DIV_PARAM;//读CPU的 CPU/CAMERA/DC 分频系数
78 pix_div = (pix_div>>24)&0xff;
79 rt_kprintf("old pll_clk=%d, pix_div=%d\n", pll_clk, pix_div);
80
81 divider_int = pll_clk/(1000000) *PCLK/1000;
82 if(divider_int%1000>=500)
83 divider_int = divider_int/1000+1;
84 else
85 divider_int = divider_int/1000;
86 rt_kprintf("divider_int = %d\n", divider_int);
87
88 /* check whether divisor is too small. */
89 if (divider_int < 1) {
90 rt_kprintf("Warning: clock source is too slow.Try smaller resolution\n");
91 divider_int = 1;
92 }
93 else if(divider_int > 100) {
94 rt_kprintf("Warning: clock source is too fast.Try smaller resolution\n");
95 divider_int = 100;
96 }
97 /* 配置分频寄存器 */
98 {
99 rt_uint32_t regval = 0;
100 regval = PLL_DIV_PARAM;
101 /*首先需要把分频使能位清零 */
102 regval &= ~0x80000030; //PIX_DIV_VALID PIX_SEL 置0
103 regval &= ~(0x3f<<24); //PIX_DIV 清零
104 regval |= divider_int << 24;
105 PLL_DIV_PARAM = regval;
106 regval |= 0x80000030; //PIX_DIV_VALID PIX_SEL 置1
107 PLL_DIV_PARAM = regval;
108 }
109 rt_kprintf("new PLL_FREQ=0x%x, PLL_DIV_PARAM=0x%x\n", PLL_FREQ, PLL_DIV_PARAM);
110 rt_thread_delay(10);
111 return 0;
112 }
113
rt_dc_init(rt_device_t dev)114 static rt_err_t rt_dc_init(rt_device_t dev)
115 {
116 int i, out, mode=-1;
117 int val;
118
119 rt_kprintf("PWM initied\n");
120 /* Set the back light PWM. */
121 pwminit();
122
123 for (i=0; i<sizeof(vga_mode)/sizeof(struct vga_struct); i++)
124 {
125 if (vga_mode[i].hr == FB_XSIZE && vga_mode[i].vr == FB_YSIZE)
126 {
127 mode=i;
128 /* 计算时钟 配置频率*/
129 caclulate_freq(OSC, vga_mode[i].pclk);
130 break;
131 }
132 }
133
134 if (mode<0)
135 {
136 rt_kprintf("\n\n\nunsupported framebuffer resolution\n\n\n");
137 return -RT_ERROR;
138 }
139
140 DC_FB_CONFIG = 0x0;
141 DC_FB_CONFIG = 0x3; // // framebuffer configuration RGB565
142 DC_DITHER_CONFIG = 0x0; //颜色抖动配置寄存器
143 DC_DITHER_TABLE_LOW = 0x0; //颜色抖动查找表低位寄存器
144 DC_DITHER_TABLE_HIGH = 0x0; //颜色抖动查找表高位寄存器
145 DC_PANEL_CONFIG = 0x80001311; //液晶面板配置寄存器
146 DC_PANEL_TIMING = 0x0;
147
148 DC_HDISPLAY = (vga_mode[mode].hfl<<16) | vga_mode[mode].hr;
149 DC_HSYNC = 0x40000000 | (vga_mode[mode].hse<<16) | vga_mode[mode].hss;
150 DC_VDISPLAY = (vga_mode[mode].vfl<<16) | vga_mode[mode].vr;
151 DC_VSYNC = 0x40000000 | (vga_mode[mode].vse<<16) | vga_mode[mode].vss;
152
153 #if defined(CONFIG_VIDEO_32BPP)
154 DC_FB_CONFIG = 0x00100105;
155 DC_FB_BUFFER_STRIDE = FB_XSIZE*4;
156 #elif defined(CONFIG_VIDEO_24BPP)
157 DC_FB_CONFIG = 0x00100104;
158 DC_FB_BUFFER_STRIDE = (FB_XSIZE*4+255)&(~255);
159 #elif defined(CONFIG_VIDEO_16BPP)// 使用这个选项
160 DC_FB_CONFIG = 0x00100103;
161 DC_FB_BUFFER_STRIDE = (FB_XSIZE*2+0x7f)&(~0x7f);
162 #elif defined(CONFIG_VIDEO_15BPP)
163 DC_FB_CONFIG = 0x00100102;
164 DC_FB_BUFFER_STRIDE = (FB_XSIZE*2+255)&(~255);
165 #elif defined(CONFIG_VIDEO_12BPP)
166 DC_FB_CONFIG = 0x00100101;
167 DC_FB_BUFFER_STRIDE = (FB_XSIZE*2+255)&(~255);
168 #else
169 DC_FB_CONFIG = 0x00100104;
170 DC_FB_BUFFER_STRIDE = (FB_XSIZE*4+255)&(~255);
171 #endif
172 return RT_EOK;
173 }
174
rt_dc_control(rt_device_t dev,int cmd,void * args)175 static rt_err_t rt_dc_control(rt_device_t dev, int cmd, void *args)
176 {
177 switch (cmd)
178 {
179 case RTGRAPHIC_CTRL_RECT_UPDATE:
180 {
181 if (fb_index == 0)
182 {
183 DC_FB_BUFFER_ADDR0 = (rt_uint32_t)_rt_framebuffer1 - 0x80000000;
184 DC_FB_BUFFER_ADDR1 = (rt_uint32_t)_rt_framebuffer1 - 0x80000000;
185 rt_memcpy((void *)_rt_framebuffer1, (const void *)_rt_framebuffer, sizeof(_rt_framebuffer));
186 rt_memcpy((void *)_rt_framebuffer1, (const void *)_rt_framebuffer, sizeof(_rt_framebuffer));
187 fb_index =1;
188 }
189 else
190 {
191 DC_FB_BUFFER_ADDR0 = (rt_uint32_t)_rt_framebuffer0 - 0x80000000;
192 DC_FB_BUFFER_ADDR1 = (rt_uint32_t)_rt_framebuffer0 - 0x80000000;
193 rt_memcpy((void *)_rt_framebuffer0, (const void *)_rt_framebuffer, sizeof(_rt_framebuffer));
194 rt_memcpy((void *)_rt_framebuffer0, (const void *)_rt_framebuffer, sizeof(_rt_framebuffer));
195 fb_index =0;
196 }
197 break;
198 }
199 case RTGRAPHIC_CTRL_POWERON:
200 break;
201 case RTGRAPHIC_CTRL_POWEROFF:
202 break;
203 case RTGRAPHIC_CTRL_GET_INFO:
204 rt_memcpy(args, &_dc_info, sizeof(_dc_info));
205 break;
206 case RTGRAPHIC_CTRL_SET_MODE:
207 break;
208 }
209
210 return RT_EOK;
211 }
212
rt_hw_dc_init(void)213 void rt_hw_dc_init(void)
214 {
215 rt_device_t dc = rt_malloc(sizeof(struct rt_device));
216 if (dc == RT_NULL)
217 {
218 rt_kprintf("dc == RT_NULL\n");
219 return; /* no memory yet */
220 }
221
222 _dc_info.bits_per_pixel = 16;
223 _dc_info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_RGB565;
224 _dc_info.framebuffer = (rt_uint8_t*)HW_FB_ADDR;
225 _dc_info.width = FB_XSIZE;
226 _dc_info.height = FB_YSIZE;
227
228 /* init device structure */
229 dc->type = RT_Device_Class_Graphic;
230 dc->init = rt_dc_init;
231 dc->open = RT_NULL;
232 dc->close = RT_NULL;
233 dc->control = rt_dc_control;
234 dc->user_data = (void*)&_dc_info;
235
236 /* register Display Controller device to RT-Thread */
237 rt_device_register(dc, "dc", RT_DEVICE_FLAG_RDWR);
238
239 rt_device_init(dc);
240 }
241
242 #include <rtgui/driver.h>
243 #include "display_controller.h"
244
245 /* initialize for gui driver */
rtgui_lcd_init(void)246 int rtgui_lcd_init(void)
247 {
248 rt_device_t dc;
249 rt_kprintf("DC initied\n");
250
251 pin_set_purpose(76, PIN_PURPOSE_OTHER);
252 pin_set_remap(76, PIN_REMAP_DEFAULT);
253
254 /* init Display Controller */
255 rt_hw_dc_init();
256
257 /* find Display Controller device */
258 dc = rt_device_find("dc");
259
260 /* set Display Controller device as rtgui graphic driver */
261 rtgui_graphic_set_device(dc);
262
263 return 0;
264 }
265
266 INIT_DEVICE_EXPORT(rtgui_lcd_init);
267
268 #endif
269