Split up brcm63xx into files/

[openwrt/openwrt.git] / target / linux / brcm63xx-2.6 / files / arch / mips / bcm963xx / ser_init.c

diff --git a/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/ser_init.c b/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/ser_init.c
new file mode 100644 (file)
index 0000000..bd53abb
--- /dev/null
+++ b/target/linux/brcm63xx-2.6/files/arch/mips/bcm963xx/ser_init.c
@@ -0,0 +1,180 @@
+/*
+<:copyright-gpl 
+ Copyright 2004 Broadcom Corp. All Rights Reserved. 
+ 
+ This program is free software; you can distribute it and/or modify it 
+ under the terms of the GNU General Public License (Version 2) as 
+ published by the Free Software Foundation. 
+ 
+ This program is distributed in the hope 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. 
+:>
+*/
+/*
+ *  Broadcom bcm63xx serial port initialization, also prepare for printk
+ *  by registering with console_init
+ *   
+ */
+
+#include <linux/autoconf.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/console.h>
+#include <linux/sched.h>
+
+#include <asm/addrspace.h>
+#include <asm/irq.h>
+#include <asm/reboot.h>
+#include <asm/gdb-stub.h>
+#include <asm/mc146818rtc.h> 
+
+#include <bcm_map_part.h>
+#include <board.h>
+
+#define  SER63XX_DEFAULT_BAUD      115200
+#define BD_BCM63XX_TIMER_CLOCK_INPUT    (FPERIPH)
+#define stUart ((volatile Uart * const) UART_BASE)
+
+// Transmit interrupts
+#define TXINT       (TXFIFOEMT | TXUNDERR | TXOVFERR)
+// Receive interrupts
+#define RXINT       (RXFIFONE | RXOVFERR)
+
+/* --------------------------------------------------------------------------
+    Name: serial_init
+ Purpose: Initalize the UART
+-------------------------------------------------------------------------- */
+void __init serial_init(void)
+{
+    UINT32 tmpVal = SER63XX_DEFAULT_BAUD;
+    ULONG clockFreqHz;    
+
+#if defined(CONFIG_BCM96345)
+    // Make sure clock is ticking
+    PERF->blkEnables |= UART_CLK_EN;
+#endif
+               
+    /* Dissable channel's receiver and transmitter.                */
+    stUart->control &= ~(BRGEN|TXEN|RXEN);
+               
+    /*--------------------------------------------------------------------*/
+    /* Write the table value to the clock select register.                */
+    /* DPullen - this is the equation to use:                             */
+    /*       value = clockFreqHz / baud / 32-1;                           */
+    /*   (snmod) Actually you should also take into account any necessary */
+    /*           rounding.  Divide by 16, look at lsb, if 0, divide by 2  */
+    /*           and subtract 1.  If 1, just divide by 2                  */
+    /*--------------------------------------------------------------------*/
+    clockFreqHz = BD_BCM63XX_TIMER_CLOCK_INPUT;
+    tmpVal = (clockFreqHz / tmpVal) / 16;
+    if( tmpVal & 0x01 )
+        tmpVal /= 2;  //Rounding up, so sub is already accounted for
+    else
+        tmpVal = (tmpVal / 2) - 1; // Rounding down so we must sub 1
+    stUart->baudword = tmpVal;
+        
+    /* Finally, re-enable the transmitter and receiver.            */
+    stUart->control |= (BRGEN|TXEN|RXEN);
+
+    stUart->config   = (BITS8SYM | ONESTOP);
+    // Set the FIFO interrupt depth ... stUart->fifocfg  = 0xAA;
+    stUart->fifoctl  =  RSTTXFIFOS | RSTRXFIFOS;
+    stUart->intMask  = 0;       
+    stUart->intMask = RXINT | TXINT;
+}
+
+
+/* prom_putc()
+ * Output a character to the UART
+ */
+void prom_putc(char c)
+{
+       /* Wait for Tx uffer to empty */
+       while (! (READ16(stUart->intStatus) & TXFIFOEMT));
+       /* Send character */
+       stUart->Data = c;
+}
+
+/* prom_puts()
+ * Write a string to the UART
+ */
+void prom_puts(const char *s)
+{
+       while (*s) {
+               if (*s == '\n') {
+                       prom_putc('\r');
+               }
+               prom_putc(*s++);
+       }
+}
+
+
+/* prom_getc_nowait()
+ * Returns a character from the UART
+ * Returns -1 if no characters available or corrupted
+ */
+int prom_getc_nowait(void)
+{
+    uint16  uStatus;
+    int    cData = -1;
+
+     uStatus = READ16(stUart->intStatus);
+
+     if (uStatus & RXFIFONE) { /* Do we have a character? */
+           cData =  READ16(stUart->Data) & 0xff; /* Read character */
+           if (uStatus & (RXFRAMERR | RXPARERR)) {  /* If we got an error, throw it away */
+               cData = -1;
+           }
+  }
+
+   return cData;
+}
+
+/* prom_getc()
+ * Returns a charcter from the serial port
+ * Will block until it receives a valid character
+*/
+char prom_getc(void)
+{
+    int    cData = -1;
+
+    /* Loop until we get a valid character */
+    while(cData == -1) {
+       cData = prom_getc_nowait();
+    }
+   return (char) cData;
+}
+
+/* prom_testc()
+ * Returns 0 if no characters available
+ */
+int prom_testc(void)
+{
+    uint16  uStatus;
+
+     uStatus = READ16(stUart->intStatus);
+
+     return (uStatus & RXFIFONE);
+}
+
+#if defined (CONFIG_REMOTE_DEBUG)
+/* Prevent other code from writing to the serial port */
+void _putc(char c) { }
+void _puts(const char *ptr) { }
+#else
+/* Low level outputs call prom routines */
+void _putc(char c) {
+       prom_putc(c);
+}
+void _puts(const char *ptr) {
+       prom_puts(ptr);
+}
+#endif