1 /* 2 * PROJECT: ReactOS Boot Loader 3 * LICENSE: BSD - See COPYING.ARM in the top level directory 4 * FILE: boot/armllb/hw/omap3-zoom2/hwlcd.c 5 * PURPOSE: LLB LCD Routines for OMAP3 ZOOM2 6 * PROGRAMMERS: ReactOS Portable Systems Group 7 */ 8 9 #include "precomp.h" 10 11 PUSHORT LlbHwVideoBuffer; 12 13 VOID 14 NTAPI 15 LlbHwOmap3LcdInitialize(VOID) 16 { 17 /* 18 * N.B. The following initialization sequence took about 12 months to figure 19 * out. 20 * This means if you are glancing at it and have no idea what on Earth 21 * could possibly be going on, this is *normal*. 22 * Just trust that this turns on the LCD. 23 * And be thankful all you ever have to worry about is Java and HTML. 24 */ 25 26 /* Turn on the functional and interface clocks in the entire PER domain */ 27 WRITE_REGISTER_ULONG(0x48005000, 0x3ffff); /* Functional clocks */ 28 WRITE_REGISTER_ULONG(0x48005010, 0x3ffff); /* Interface clocks */ 29 30 /* Now that GPIO Module 3 is on, send a reset to the LCD panel on GPIO 96 */ 31 WRITE_REGISTER_ULONG(0x49054034, 0); /* FIXME: Enable all as output */ 32 WRITE_REGISTER_ULONG(0x49054094, 0xffffffff); /* FIXME: Output on all gpios */ 33 34 /* Now turn on the functional and interface clocks in the CORE domain */ 35 WRITE_REGISTER_ULONG(0x48004a00, 0x03fffe29); /* Functional clocks */ 36 WRITE_REGISTER_ULONG(0x48004a10, 0x3ffffffb); /* Interface clocks */ 37 38 /* The HS I2C interface is now on, configure it */ 39 WRITE_REGISTER_USHORT(0x48070024, 0x0); /* Disable I2c */ 40 WRITE_REGISTER_USHORT(0x48070030, 0x17); /* Configure clock divider */ 41 WRITE_REGISTER_USHORT(0x48070034, 0xd); /* Configure clock scaler */ 42 WRITE_REGISTER_USHORT(0x48070038, 0xf); /* Configure clock scaler */ 43 WRITE_REGISTER_USHORT(0x48070020, 0x215); /* Configure clocks and idle */ 44 WRITE_REGISTER_USHORT(0x4807000c, 0x636f); /* Select wakeup bits */ 45 WRITE_REGISTER_USHORT(0x48070014, 0x4343); /* Disable DMA */ 46 WRITE_REGISTER_USHORT(0x48070024, 0x8000); /* Enable I2C */ 47 48 /* 49 * Set the VPLL2 to cover all device groups instead of just P3. 50 * This essentially enables the VRRTC to power up the LCD panel. 51 */ 52 LlbHwOmap3TwlWrite1(0x4B, 0x8E, 0xE0); 53 54 /* VPLL2 runs at 1.2V by default, so we need to reprogram to 1.8V for DVI */ 55 LlbHwOmap3TwlWrite1(0x4B, 0x91, 0x05); 56 57 /* Set GPIO pin 7 on the TWL4030 as an output pin */ 58 LlbHwOmap3TwlWrite1(0x49, 0x9B, 0x80); 59 60 /* Set GPIO pin 7 signal on the TWL4030 ON. This powers the LCD backlight */ 61 LlbHwOmap3TwlWrite1(0x49, 0xA4, 0x80); 62 63 /* Now go on the McSPI interface and program it on for the channel */ 64 WRITE_REGISTER_ULONG(0x48098010, 0x15); 65 WRITE_REGISTER_ULONG(0x48098020, 0x1); 66 WRITE_REGISTER_ULONG(0x48098028, 0x1); 67 WRITE_REGISTER_ULONG(0x4809802c, 0x112fdc); 68 69 /* Send the reset signal (R2 = 00h) to the NEC WVGA LCD Panel */ 70 WRITE_REGISTER_ULONG(0x48098034, 0x1); 71 WRITE_REGISTER_ULONG(0x48098038, 0x20100); 72 WRITE_REGISTER_ULONG(0x48098034, 0x0); 73 74 /* Turn on the functional and interface clocks in the DSS domain */ 75 WRITE_REGISTER_ULONG(0x48004e00, 0x5); 76 WRITE_REGISTER_ULONG(0x48004e10, 0x1); 77 78 /* Reset the Display Controller (DISPC) */ 79 WRITE_REGISTER_ULONG(0x48050410, 0x00000005); // DISPC_SYSCONFIG 80 81 /* Set the frame buffer address */ 82 WRITE_REGISTER_ULONG(0x48050480, 0x800A0000); // DISPC_GFX_BA0 83 84 /* Set resolution and RGB16 color mode */ 85 WRITE_REGISTER_ULONG(0x4805048c, 0x01df031f); // DISPC_GFX_SIZE 86 WRITE_REGISTER_ULONG(0x480504a0, 0x0000000d); // DISPC_GFX_ATTRIBUTES 87 88 /* Set LCD timings (VSync and HSync), pixel clock, and LCD size */ 89 WRITE_REGISTER_ULONG(0x4805046c, 0x00003000); // DISPC_POL_FREQ 90 WRITE_REGISTER_ULONG(0x48050470, 0x00010004); // DISPC_DIVISOR 91 WRITE_REGISTER_ULONG(0x48050464, 0x00300500); // DISPC_TIMING_H 92 WRITE_REGISTER_ULONG(0x48050468, 0x00400300); // DISPC_TIMING_V 93 WRITE_REGISTER_ULONG(0x4805047c, 0x01df031f); // DISPC_SIZE_LCD 94 95 /* Turn the LCD on */ 96 WRITE_REGISTER_ULONG(0x48050440, 0x00018309); // DISPC_CONTROL 97 } 98 99 ULONG 100 NTAPI 101 LlbHwGetScreenWidth(VOID) 102 { 103 return 800; 104 } 105 106 ULONG 107 NTAPI 108 LlbHwGetScreenHeight(VOID) 109 { 110 return 480; 111 } 112 113 PVOID 114 NTAPI 115 LlbHwGetFrameBuffer(VOID) 116 { 117 return (PVOID)0x800A0000; 118 } 119 120 ULONG 121 NTAPI 122 LlbHwVideoCreateColor(IN ULONG Red, 123 IN ULONG Green, 124 IN ULONG Blue) 125 { 126 return (((Red >> 3) << 11)| ((Green >> 2) << 5)| ((Blue >> 3) << 0)); 127 } 128 129 /* EOF */ 130