From 48daf0cef7595963947576cec2df13c16e62cb16 Mon Sep 17 00:00:00 2001
From: Jeffrey Lee <jlee@gitlab.riscosopen.org>
Date: Sun, 13 Jan 2013 20:35:10 +0000
Subject: [PATCH] Program the gamma table in the Pandora's LCD
Detail:
s/Video - Added code to program the gamma table in the Pandora's LCD, as the power-on settings aren't very good
s/Boot - Initialise the LCD at the right time
hdr/SPI - SPI register definitions, for programming the gamma table and (eventually) a full SPI driver
Admin:
Tested on Pandora
Version 0.84. Tagged as 'OMAP3-0_84'
---
VersionASM | 12 +++---
VersionNum | 20 ++++-----
hdr/SPI | 41 ++++++++++++++++++
s/Boot | 3 ++
s/Video | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 179 insertions(+), 16 deletions(-)
create mode 100644 hdr/SPI
diff --git a/VersionASM b/VersionASM
index 1ef73c6..2d669f7 100644
--- a/VersionASM
+++ b/VersionASM
@@ -11,13 +11,13 @@
GBLS Module_HelpVersion
GBLS Module_ComponentName
GBLS Module_ComponentPath
-Module_MajorVersion SETS "0.83"
-Module_Version SETA 83
+Module_MajorVersion SETS "0.84"
+Module_Version SETA 84
Module_MinorVersion SETS ""
-Module_Date SETS "21 Nov 2012"
-Module_ApplicationDate SETS "21-Nov-12"
+Module_Date SETS "13 Jan 2013"
+Module_ApplicationDate SETS "13-Jan-13"
Module_ComponentName SETS "OMAP3"
Module_ComponentPath SETS "castle/RiscOS/Sources/HAL/OMAP3"
-Module_FullVersion SETS "0.83"
-Module_HelpVersion SETS "0.83 (21 Nov 2012)"
+Module_FullVersion SETS "0.84"
+Module_HelpVersion SETS "0.84 (13 Jan 2013)"
END
diff --git a/VersionNum b/VersionNum
index ecf788a..7731a88 100644
--- a/VersionNum
+++ b/VersionNum
@@ -1,23 +1,23 @@
-/* (0.83)
+/* (0.84)
*
* This file is automatically maintained by srccommit, do not edit manually.
* Last processed by srccommit version: 1.1.
*
*/
-#define Module_MajorVersion_CMHG 0.83
+#define Module_MajorVersion_CMHG 0.84
#define Module_MinorVersion_CMHG
-#define Module_Date_CMHG 21 Nov 2012
+#define Module_Date_CMHG 13 Jan 2013
-#define Module_MajorVersion "0.83"
-#define Module_Version 83
+#define Module_MajorVersion "0.84"
+#define Module_Version 84
#define Module_MinorVersion ""
-#define Module_Date "21 Nov 2012"
+#define Module_Date "13 Jan 2013"
-#define Module_ApplicationDate "21-Nov-12"
+#define Module_ApplicationDate "13-Jan-13"
#define Module_ComponentName "OMAP3"
#define Module_ComponentPath "castle/RiscOS/Sources/HAL/OMAP3"
-#define Module_FullVersion "0.83"
-#define Module_HelpVersion "0.83 (21 Nov 2012)"
-#define Module_LibraryVersionInfo "0:83"
+#define Module_FullVersion "0.84"
+#define Module_HelpVersion "0.84 (13 Jan 2013)"
+#define Module_LibraryVersionInfo "0:84"
diff --git a/hdr/SPI b/hdr/SPI
new file mode 100644
index 0000000..9d45d8d
--- /dev/null
+++ b/hdr/SPI
@@ -0,0 +1,41 @@
+; Copyright 2013 Castle Technology Ltd
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+;
+
+; SPI registers - relative to L4_McSPI1, L4_McSPI2, etc.
+MCSPI_REVISION * &00
+MCSPI_SYSCONFIG * &10
+MCSPI_SYSSTATUS * &14
+MCSPI_IRQSTATUS * &18
+MCSPI_IRQENABLE * &1C
+MCSPI_WAKEUPENABLE * &20
+MCSPI_SYST * &24
+MCSPI_MODULCTRL * &28
+MCSPI_CHxCONF * &2C
+MCSPI_CHxSTAT * &30
+MCSPI_CHxCTRL * &34
+MCSPI_TXx * &38
+MCSPI_RXx * &3C
+MCSPI_XFERLEVEL * &7C
+
+; Stride between per-channel registers
+MCSPI_STRIDE * &14
+
+; Interrupt numbers
+SPI1_IRQ * 65
+SPI2_IRQ * 66
+SPI3_IRQ * 91
+SPI4_IRQ * 48
+
+ END
diff --git a/s/Boot b/s/Boot
index 2d8180f..674091b 100644
--- a/s/Boot
+++ b/s/Boot
@@ -183,6 +183,7 @@ HALdescriptor DATA
IMPORT BMUParams_TPS65950_TouchBook
IMPORT BMUParams_BQ27200_TouchBook
IMPORT BMUParams_BQ27500_Pandora
+ IMPORT Video_SetPandoraGamma
EXPORT Board_Init_BeagleBoard
EXPORT Board_Init_DevKit8000
@@ -937,6 +938,8 @@ Board_InitDevices_Pandora
ADRL a1, BMUWS1
ADRL a2, BMUParams_BQ27500_Pandora
BL BMU_InitDevice
+ ; LCD gamma (done here for simplicity)
+ BL Video_SetPandoraGamma
EXIT
Board_InitDevices_IGEPv2
diff --git a/s/Video b/s/Video
index 7e09318..bb4d82e 100644
--- a/s/Video
+++ b/s/Video
@@ -30,6 +30,7 @@
GET hdr.GPIO
GET hdr.CoPro15ops
GET hdr.Timers
+ GET hdr.SPI
AREA |Asm$$Code|, CODE, READONLY, PIC
@@ -54,10 +55,12 @@
EXPORT Video_Power_VBC_DVI
EXPORT Video_Power_VBC_Pandora
EXPORT Video_Power_VBC_TouchBook
+ EXPORT Video_SetPandoraGamma
IMPORT memcpy
IMPORT GPIOx_SetAsOutput
IMPORT GPIOx_SetOutput
+ IMPORT HAL_CounterDelay
MACRO
CallOS $entry
@@ -278,5 +281,121 @@ Video_TVDet_Func
GPIO_GetInput a1, a1, a2
EXIT
+Video_SetPandoraGamma ROUT
+ Entry "v1-v4"
+ ADR a1, PandoraGamma
+ ; Reset McSPI1 and configure channel 1
+ LDR a2, L4_Core_Log
+ ADD a2, a2, #L4_McSPI1-L4_Core
+ MOV a3, #2
+ STR a3, [a2, #MCSPI_SYSCONFIG]
+10
+ LDR a3, [a2, #MCSPI_SYSSTATUS]
+ TST a3, #1
+ BEQ %BT10
+ MOV a3, #1
+ STR a3, [a2, #MCSPI_MODULCTRL]
+ LDR v4, =(7<<2)+(1<<6)+(15<<7)+(2<<12)+(1<<16)
+ ADD a2, a2, #MCSPI_STRIDE
+ STR v4, [a2, #MCSPI_CHxCONF]
+ ; Configure display
+ MOV a3, #2
+ MOV a4, #&f
+ BL td043_write
+ MOV a3, #3
+ MOV a4, #&df
+ BL td043_write
+ MOV a3, #&20
+ MOV a4, #&f0
+ BL td043_write
+ MOV a3, #&21
+ MOV a4, #&f0
+ BL td043_write
+ ; Process gamma table
+ ; Bits 9-8 of table entries
+ MOV v1, #2
+20
+ MOV a4, #0
+ MOV v2, #3
+30
+ ADD v3, v2, v1, LSL #2
+ ADD v3, a1, v3, LSL #1
+ ADD ip, v2, #1
+ LDRH v3, [v3]
+ MOV ip, ip, LSL #1
+ AND v3, v3, #&300
+ ORR a4, a4, v3, LSR ip
+ SUBS v2, v2, #1
+ BGE %BT30
+ ADD a3, v1, #&11
+ BL td043_write
+ SUBS v1, v1, #1
+ BGE %BT20
+ ; bits 7-0
+ MOV v1, #0
+40
+ LDRH a4, [a1], #2
+ ADD a3, v1, #&14
+ AND a4, a4, #255
+ BL td043_write
+ ADD v1, v1, #1
+ CMP v1, #12
+ BLT %BT40
+ ; Done
+ EXIT
+
+td043_write ROUT
+ Entry "a1-a2"
+ ; In:
+ ; a2 = SPI register block
+ ; a3 = register
+ ; a4 = data
+ ; v4 = channel config
+ ; Out:
+ ; a3-a4 corrupt
+ ; Construct 16 bit SPI data word
+ ORR a3, a4, a3, LSL #10
+ ORR a3, a3, #1<<8
+ ; Set force flag
+ ORR a4, v4, #1<<20
+ STR a4, [a2, #MCSPI_CHxCONF]
+ ; Enable channel
+ MOV a4, #1
+ STR a4, [a2, #MCSPI_CHxCTRL]
+ ; Write data
+ STR a3, [a2, #MCSPI_TXx]
+ ; Wait for transmission
+10
+ LDR a4, [a2, #MCSPI_CHxSTAT]
+ AND a4, a4, #6
+ TEQ a4, #6
+ BNE %BT10
+ ; Disable channel
+ MOV a4, #0
+ STR a4, [a2, #MCSPI_CHxCTRL]
+ ; Clear force flag
+ STR v4, [a2, #MCSPI_CHxCONF]
+ ; TD043 datasheet says a minimum 1ns period is needed between transfers
+ ; Chances are that amount of time has already passed, but play it safe
+ ; and wait for 1us
+ MOV a1, #1
+ BL HAL_CounterDelay
+ EXIT
+
+ ; Default gamma table used by Linux
+PandoraGamma
+ DCW 105
+ DCW 315
+ DCW 381
+ DCW 431
+ DCW 490
+ DCW 537
+ DCW 579
+ DCW 686
+ DCW 780
+ DCW 837
+ DCW 880
+ DCW 1023
+
END
--
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