[package] Add uboot for xburst package

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20832 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 141 insertions, 0 deletions

diff --git a/package/uboot-xburst/files/cpu/mips/jz_serial.c b/package/uboot-xburst/files/cpu/mips/jz_serial.c
new file mode 100644
index 0000000000..e9a18a105b
--- /dev/null
+++ b/package/uboot-xburst/files/cpu/mips/jz_serial.c
@@ -0,0 +1,141 @@
+/*
+ * Jz47xx UART support
+ *
+ * Hardcoded to UART 0 for now
+ * Options also hardcoded to 8N1
+ *
+ *  Copyright (c) 2005
+ *  Ingenic Semiconductor, <jlwei@ingenic.cn>
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+
+#if defined(CONFIG_JZ4740)
+
+#include <common.h>
+
+#include <asm/jz4740.h>
+
+#undef UART_BASE
+#ifndef CONFIG_SYS_UART_BASE
+#define UART_BASE  UART0_BASE
+#else
+#define UART_BASE  CONFIG_SYS_UART_BASE
+#endif
+
+/******************************************************************************
+*
+* serial_init - initialize a channel
+*
+* This routine initializes the number of data bits, parity
+* and set the selected baud rate. Interrupts are disabled.
+* Set the modem control signals if the option is selected.
+*
+* RETURNS: N/A
+*/
+
+int serial_init (void)
+{
+#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
+	volatile u8 *uart_fcr = (volatile u8 *)(UART_BASE + OFF_FCR);
+	volatile u8 *uart_lcr = (volatile u8 *)(UART_BASE + OFF_LCR);
+	volatile u8 *uart_ier = (volatile u8 *)(UART_BASE + OFF_IER);
+	volatile u8 *uart_sircr = (volatile u8 *)(UART_BASE + OFF_SIRCR);
+
+	/* Disable port interrupts while changing hardware */
+	*uart_ier = 0;
+
+	/* Disable UART unit function */
+	*uart_fcr = ~UART_FCR_UUE;
+
+	/* Set both receiver and transmitter in UART mode (not SIR) */
+	*uart_sircr = ~(SIRCR_RSIRE | SIRCR_TSIRE);
+
+	/* Set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
+	*uart_lcr = UART_LCR_WLEN_8 | UART_LCR_STOP_1;
+
+	/* Set baud rate */
+	serial_setbrg();
+
+	/* Enable UART unit, enable and clear FIFO */
+	*uart_fcr = UART_FCR_UUE | UART_FCR_FE | UART_FCR_TFLS | UART_FCR_RFLS;
+#endif
+	return 0;
+}
+
+void serial_setbrg (void)
+{
+	volatile u8 *uart_lcr = (volatile u8 *)(UART_BASE + OFF_LCR);
+	volatile u8 *uart_dlhr = (volatile u8 *)(UART_BASE + OFF_DLHR);
+	volatile u8 *uart_dllr = (volatile u8 *)(UART_BASE + OFF_DLLR);
+	u32 baud_div, tmp;
+
+	baud_div = CONFIG_SYS_EXTAL / 16 / CONFIG_BAUDRATE;
+
+	tmp = *uart_lcr;
+	tmp |= UART_LCR_DLAB;
+	*uart_lcr = tmp;
+
+	*uart_dlhr = (baud_div >> 8) & 0xff;
+	*uart_dllr = baud_div & 0xff;
+
+	tmp &= ~UART_LCR_DLAB;
+	*uart_lcr = tmp;
+}
+
+void serial_putc (const char c)
+{
+	volatile u8 *uart_lsr = (volatile u8 *)(UART_BASE + OFF_LSR);
+	volatile u8 *uart_tdr = (volatile u8 *)(UART_BASE + OFF_TDR);
+
+	if (c == '\n') serial_putc ('\r');
+
+	/* Wait for fifo to shift out some bytes */
+	while ( !((*uart_lsr & (UART_LSR_TDRQ | UART_LSR_TEMT)) == 0x60) );
+
+	*uart_tdr = (u8)c;
+}
+
+void serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
+
+int serial_getc (void)
+{
+	volatile u8 *uart_rdr = (volatile u8 *)(UART_BASE + OFF_RDR);
+
+	while (!serial_tstc());
+
+	return *uart_rdr;
+}
+
+int serial_tstc (void)
+{
+	volatile u8 *uart_lsr = (volatile u8 *)(UART_BASE + OFF_LSR);
+
+	if (*uart_lsr & UART_LSR_DR) {
+		/* Data in rfifo */
+		return (1);
+	}
+	return 0;
+}
+
+#endif