From: Grazvydas Ignotas <notasas@gmail.com>
Date: Sat, 24 Mar 2012 16:48:12 +0000 (+0200)
Subject: add some audio noise prevention measures
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-x-loader.git;a=commitdiff_plain;h=411b049808f7bf7e213525c514185534db53dbe8

add some audio noise prevention measures
---

diff --git a/board/pandora/pandora.c b/board/pandora/pandora.c
index 9086733..040a783 100644
--- a/board/pandora/pandora.c
+++ b/board/pandora/pandora.c
@@ -91,22 +91,28 @@ void udelay (unsigned long usecs) {
  *****************************************/
 int board_init(void)
 {
-#if defined(CFG_PRINTF) && defined(CONFIG_DRIVER_OMAP34XX_I2C)
+#ifdef CONFIG_DRIVER_OMAP34XX_I2C
 	unsigned char byte;
 
-	/* do additional init to prevent trash being output on startup */
-	serial_init();
-
 	/* restore GPBR1 for charging to work -
 	 * boot ROM or something clears it before us */
 	byte = 0x90;
 	i2c_write(0x49, 0x91, 1, &byte, 1);
 
+	/* disable VSIM to prevent audio noise */
+	byte = 0x00;
+	i2c_write(0x4B, 0x92, 1, &byte, 1);
+
+#ifdef CFG_PRINTF
+	/* do additional init to prevent trash being output on startup */
+	serial_init();
+
 	/* VAUX3 = 2.8V (AV connector) */
 	byte = 0x20;
 	i2c_write(0x4B, 0x7A, 1, &byte, 1);
 	byte = 0x03;
 	i2c_write(0x4B, 0x7D, 1, &byte, 1);
+#endif
 #endif
 
 	return 0;
@@ -692,14 +698,18 @@ void per_clocks_enable(void)
 	MUX_VAL(CP(GPMC_WAIT0),     (IEN  | PTU | EN  | M0)) /*GPMC_WAIT0*/\
 	MUX_VAL(CP(GPMC_WAIT1),     (IEN  | PTU | EN  | M0)) /*GPMC_WAIT1*/\
 	/*Serial Interface (Peripheral boot, Linux console)*/\
-	MUX_VAL(CP(UART3_RX_IRRX ), (IEN  | PTD | DIS | M0)) /*UART3_RX*/\
-	MUX_VAL(CP(UART3_TX_IRTX ), (IDIS | PTD | DIS | M0)) /*UART3_TX*/\
+	MUX_VAL(CP(UART3_RX_IRRX),  (IEN  | PTU | EN  | M0)) /*UART3_RX*/\
+	MUX_VAL(CP(UART3_TX_IRTX),  (IDIS | PTD | DIS | M0)) /*UART3_TX*/\
 	/*I2C Ports*/\
 	MUX_VAL(CP(I2C1_SCL),       (IEN  | PTU | EN  | M0)) /*I2C1_SCL*/\
 	MUX_VAL(CP(I2C1_SDA),       (IEN  | PTU | EN  | M0)) /*I2C1_SDA*/\
 	/*LEDs (Controlled by OMAP)*/\
 	MUX_VAL(CP(MMC1_DAT6),      (IDIS | PTD | DIS | M4)) /*GPIO_128*/\
 	MUX_VAL(CP(MMC1_DAT7),      (IDIS | PTD | DIS | M4)) /*GPIO_129*/\
+	/*enable pulldowns for peripheral enable until u-boot loads*/\
+	MUX_VAL(CP(ETK_D0_ES2),	    (IDIS | PTD | EN  | M4)) /*GPIO_14*/\
+	MUX_VAL(CP(McBSP2_DR),      (IDIS | PTD | EN  | M4)) /*GPIO_118*/\
+	MUX_VAL(CP(McBSP1_FSR),     (IDIS | PTD | EN  | M4)) /*GPIO_157*/\
 
 /**********************************************************
  * Routine: set_muxconf_regs