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annotate src/cs/drivers/drv_app/r2d/lcds/luna/r2d_onoff_i.c @ 277:0196b6bf633c

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R2D: LCD hardware suspend implemented for Luna
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 07 Sep 2021 22:18:20 +0000
parents 6541e43f88e5
children 75758d7a9be3
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1 #include "r2d/lcds/luna/r2d_luna_lcd.h"
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2 #include "main/sys_types.h"
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3 #include "armio.h"
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4
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5 static void lcd_suspend(void)
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6 {
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7 if (r2d_lcd_hw_suspend)
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8 return; /* already in suspend */
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9 r2d_lcd_hw_suspend = 1;
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10 LCD_REG_WR(0x0007, 0); /* display off */
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11 rvf_delay(RVF_MS_TO_TICKS(50));
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12 LCD_REG_WR(0x0010, 1); /* suspend mode */
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13 }
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14
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15 static void lcd_resume(void)
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16 {
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17 if (!r2d_lcd_hw_suspend)
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18 return; /* already on */
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19 LCD_REG_WR(0x0010, 0); /* out of suspend */
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20 rvf_delay(RVF_MS_TO_TICKS(50));
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21 LCD_REG_WR(0x0007, 0x1017); /* display on */
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22 r2d_lcd_hw_suspend = 0;
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23 r2d_refresh();
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24 }
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25
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26 static void r2d_onoff_action(enum blrr_display_state set_state)
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27 {
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28 UBYTE on_off;
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29
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30 /*
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31 * PWL control: on our current Luna setups (Caramel2 or iWOW DSK)
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32 * PWL is only an indicator LED for developers. We use this PWL
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33 * indicator to show the state of "virtual dimming", as there is
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34 * no physical LCD backlight dimming control on Luna.
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35 */
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36 switch (set_state) {
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37 case BLRR_DISPLAY_OFF:
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38 *(volatile SYS_UWORD8 *)0xFFFE8000 = 0;
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39 *(volatile SYS_UWORD8 *)0xFFFE8001 = 0;
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40 on_off = 0;
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41 break;
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42 case BLRR_DISPLAY_ON:
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43 *(volatile SYS_UWORD8 *)0xFFFE8000 = 255;
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44 *(volatile SYS_UWORD8 *)0xFFFE8001 = 1;
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45 on_off = 1;
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46 break;
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47 case BLRR_DISPLAY_INCALL:
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48 *(volatile SYS_UWORD8 *)0xFFFE8000 = 16;
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49 *(volatile SYS_UWORD8 *)0xFFFE8001 = 1;
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50 on_off = 1;
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51 break;
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52 case BLRR_DISPLAY_CHG_BOOT:
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53 *(volatile SYS_UWORD8 *)0xFFFE8000 = 64;
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54 *(volatile SYS_UWORD8 *)0xFFFE8001 = 1;
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55 on_off = 1;
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56 break;
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57 default:
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58 return; /* error, but we are a void function */
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59 }
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60 /* physical LCD and backlight on/off */
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61 if (on_off) {
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62 lcd_resume();
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63 AI_SetBit(9);
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64 } else {
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65 AI_ResetBit(9);
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66 lcd_suspend();
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67 }
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68 }