init commit via android 4.4 uboot

1 files changed, 264 insertions, 0 deletions

diff --git a/cpu/arm920t/wmt/serial.c b/cpu/arm920t/wmt/serial.c
new file mode 100755
index 0000000..5777507
--- /dev/null
+++ b/cpu/arm920t/wmt/serial.c
@@ -0,0 +1,264 @@
+/*++ 
+Copyright (c) 2010 WonderMedia Technologies, Inc.
+
+This program is free software: you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software 
+Foundation, either version 2 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE.  See the GNU General Public License for more details. You
+should have received a copy of the GNU General Public License along with this
+program. If not, see http://www.gnu.org/licenses/>.
+
+WonderMedia Technologies, Inc.
+10F, 529, Chung-Cheng Road, Hsin-Tien, Taipei 231, R.O.C.
+--*/
+
+/*
+ * serial.c - serial support for the WMT evaluation board
+ */
+
+#include <common.h>
+
+#ifdef CFG_WMT_SERIAL
+
+#include <asm/arch/hardware.h>
+#include "uart.h"
+#include "gpio.h"
+extern int bootcmdflag;
+extern int showinfoflag;
+
+DECLARE_GLOBAL_DATA_PTR;
+
+PUART_REG	pUart_Reg = (PUART_REG)BA_UART0;
+PGPIO_REG	pGpioReg = (PGPIO_REG)BA_GPIO;
+
+/*
+ * Function purpose:
+ *				UART initialization
+ */
+int serial_init(void)
+{
+	/* Switch the Uart's pin from default GPIO into uart function pins for UART0/UART1 */
+	pGpioReg->CTRL_UR_LPC_SF &= ~(GPIO_UR0_ALL | GPIO_UR1_ALL);
+
+	serial_setbrg();
+
+	return 0;
+}
+
+/*
+ * Function purpose:
+ *				Output character data through UART
+ */
+#ifdef CONFIG_USB_TTY		  	
+unsigned int do_puts=0;
+#endif
+void
+serial_putc(const char c)
+{
+	if (bootcmdflag == 1 || showinfoflag == 1) {
+#ifdef CONFIG_USB_TTY		  	
+    char tmp[2];
+    
+    tmp[0] = c;
+    tmp[1] = 0;
+    
+    if(( c != '\r' )&&(do_puts == 0))
+    {
+        usbtty_putc(c);
+    }
+#endif  
+	while (1) {
+		if ((pUart_Reg->URUSR & URUSR_TXDBSY) == 0) 	/* TX data not busy */
+		break;
+	}
+
+	pUart_Reg->URTDR = c;
+	if (c == '\n')
+		serial_putc('\r');
+}
+}
+
+/*
+ * Function purpose:
+ *				Output string data through UART
+ */
+void
+serial_puts(const char *s)
+{
+#ifdef CONFIG_USB_TTY		  	
+    int tmp=0;
+    
+    do_puts = 1;
+#endif
+	while (*s)
+  	{
+		serial_putc(*s++);
+#ifdef CONFIG_USB_TTY		  	
+      		tmp++;
+#endif
+}
+#ifdef CONFIG_USB_TTY		  	
+    do_puts = 0;
+    usbtty_puts ((const char *)((int)s-tmp));
+#endif
+}
+/*
+ * Function purpose:
+ *				Require character data from UART
+ */
+int
+serial_getc(void)
+{
+#ifdef CONFIG_USB_TTY		  
+	int tmp=0;
+	char c;
+
+	while (1)
+	{
+		if(pUart_Reg->URUSR & URUSR_RXDRDY)
+			{
+				tmp++;
+		    break;
+		  }
+		if(c = usbtty_getc())
+		    break;
+	}
+
+	return tmp?(pUart_Reg->URRDR&0xff):c;
+#else
+	while (!(pUart_Reg->URUSR & URUSR_RXDRDY));
+
+	return pUart_Reg->URRDR&0xff;
+#endif
+}
+
+/*
+ * Function purpose:
+ *				return RXDRDY status bit in Uart status register
+ */
+int
+serial_tstc(void)
+{
+#ifdef CONFIG_USB_TTY		  
+	return (((pUart_Reg->URUSR & URUSR_RXDRDY)||usbtty_getc()) ? 1 : 0);
+#else
+	return ((pUart_Reg->URUSR & URUSR_RXDRDY) ? 1 : 0);
+#endif		
+}
+
+/*
+ * Function purpose:
+ *				Uart baud rate setting and initialization
+ * Note:
+ *				Relative settings according to UART/IrDA
+ *				Programmer Guide Revision 0.13
+ */
+void
+serial_setbrg(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	unsigned long TmpDiv = 0;
+	unsigned long TmpBkr = 0;
+
+	switch (gd->baudrate) {
+	/*
+	case BR_921K6:
+		TmpDiv = UART_BR_921K6;
+		TmpBkr = UART_BK_921K6;
+		break;
+
+	case BR_460K8:
+		TmpDiv = UART_BR_460K8;
+		TmpBkr = UART_BK_460K8;
+		break;
+
+	case BR_230K4:
+		TmpDiv = UART_BR_230K4;
+		TmpBkr = UART_BK_230K4;
+		break;
+	*/
+
+	case BR_57K6:
+		TmpDiv = UART_BR_57K6;
+		TmpBkr = UART_BK_57K6;
+		break;
+	/*
+	case BR_28K8:
+		TmpDiv = UART_BR_28K8;
+		TmpBkr = UART_BK_28K8;
+		break;
+
+	case BR_14K4:
+		TmpDiv = UART_BR_14K4;
+		TmpBkr = UART_BK_14K4;
+		break;
+
+	case BR_7K2:
+		TmpDiv = UART_BR_7K2;
+		TmpBkr = UART_BK_7K2;
+		break;
+
+	case BR_3K6:
+		TmpDiv = UART_BR_3K6;
+		TmpBkr = UART_BK_3K6;
+		break;
+	*/
+
+	case BR_38K4:
+		TmpDiv = UART_BR_38K4;
+		TmpBkr = UART_BK_38K4;
+		break;
+
+	case BR_19K2:
+		TmpDiv = UART_BR_19K2;
+		TmpBkr = UART_BK_19K2;
+		break;
+
+	case BR_9K6:
+		TmpDiv = UART_BR_9K6;
+		TmpBkr = UART_BK_9K6;
+		break;
+
+	case BR_115K2:
+	default:
+		TmpDiv = UART_BR_115K2;
+		TmpBkr = UART_BK_115K2;
+		break;
+	}
+
+	pUart_Reg->URDIV = TmpDiv;
+	pUart_Reg->URBKR = TmpBkr;
+
+	/* Disable TX,RX */
+	pUart_Reg->URLCR = 0;
+
+	/* Disable all interrupt */
+	pUart_Reg->URIER = 0;
+
+	/* Clear all interrupt status until all zeros */
+	/*
+	while (pUart_Reg->URISR) {
+		pUart_Reg->URISR = pUart_Reg->URISR;
+	}
+	*/
+
+	/* Reset Tx,Rx Fifo until all zeros */
+	while (pUart_Reg->URFCR) {
+		/* Reset TX,RX Fifo */
+		pUart_Reg->URFCR = URFCR_TXFRST | URFCR_RXFRST;
+	}
+
+	/* Disable Fifo */
+	pUart_Reg->URFCR &= (~URFCR_FIFOEN);
+
+	/* 8-N-1 */
+	pUart_Reg->URLCR |= (URLCR_DLEN8B & ~URLCR_STBLEN2b & ~URLCR_PYTEN);
+
+	/* Enable TX,RX */
+	pUart_Reg->URLCR |= URLCR_RXEN | URLCR_TXEN;
+}
+
+#endif	/* CFG_WMT_SERIAL */