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authorWolfgang Denk <wd@denx.de>2009-02-07 23:51:52 +0100
committerWolfgang Denk <wd@denx.de>2009-02-07 23:51:52 +0100
commitf8306cb94f59ae2ace5bfede189944d329e5abb3 (patch)
treec26c402b9d1c3d28f5a54ffd4fcd2f3a393772de /cpu/blackfin/serial.h
parent657f2062d8e17ebf4a55f52c9e71c07c0c94c779 (diff)
parent2d43e873a29ca4959ba6a30fc7fb396d3fd0dccf (diff)
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Merge branch 'master' of ssh://gemini/home/wd/git/u-boot/master
Diffstat (limited to 'cpu/blackfin/serial.h')
-rw-r--r--cpu/blackfin/serial.h72
1 files changed, 19 insertions, 53 deletions
diff --git a/cpu/blackfin/serial.h b/cpu/blackfin/serial.h
index f671096..ce39148 100644
--- a/cpu/blackfin/serial.h
+++ b/cpu/blackfin/serial.h
@@ -156,16 +156,25 @@ static inline void serial_early_init(void)
}
__attribute__((always_inline))
-static inline uint32_t serial_early_get_baud(void)
+static inline void serial_early_put_div(uint16_t divisor)
{
- /* If the UART isnt enabled, then we are booting an LDR
- * from a non-UART source (so like flash) which means
- * the baud rate here is meaningless.
- */
- if ((*pUART_GCTL & UCEN) != UCEN)
- return 0;
+ /* Set DLAB in LCR to Access DLL and DLH */
+ ACCESS_LATCH();
+ SSYNC();
-#if (0) /* See comment for serial_reset_baud() in initcode.c */
+ /* Program the divisor to get the baud rate we want */
+ *pUART_DLL = LOB(divisor);
+ *pUART_DLH = HIB(divisor);
+ SSYNC();
+
+ /* Clear DLAB in LCR to Access THR RBR IER */
+ ACCESS_PORT_IER();
+ SSYNC();
+}
+
+__attribute__((always_inline))
+static inline uint16_t serial_early_get_div(void)
+{
/* Set DLAB in LCR to Access DLL and DLH */
ACCESS_LATCH();
SSYNC();
@@ -173,16 +182,12 @@ static inline uint32_t serial_early_get_baud(void)
uint8_t dll = *pUART_DLL;
uint8_t dlh = *pUART_DLH;
uint16_t divisor = (dlh << 8) | dll;
- uint32_t baud = get_sclk() / (divisor * 16);
/* Clear DLAB in LCR to Access THR RBR IER */
ACCESS_PORT_IER();
SSYNC();
- return baud;
-#else
- return CONFIG_BAUDRATE;
-#endif
+ return divisor;
}
__attribute__((always_inline))
@@ -192,20 +197,7 @@ static inline void serial_early_set_baud(uint32_t baud)
* weird multiplication is to make sure we over sample just
* a little rather than under sample the incoming signals.
*/
- uint16_t divisor = (get_sclk() + (baud * 8)) / (baud * 16) - ANOMALY_05000230;
-
- /* Set DLAB in LCR to Access DLL and DLH */
- ACCESS_LATCH();
- SSYNC();
-
- /* Program the divisor to get the baud rate we want */
- *pUART_DLL = LOB(divisor);
- *pUART_DLH = HIB(divisor);
- SSYNC();
-
- /* Clear DLAB in LCR to Access THR RBR IER */
- ACCESS_PORT_IER();
- SSYNC();
+ serial_early_put_div((get_sclk() + (baud * 8)) / (baud * 16) - ANOMALY_05000230);
}
#ifndef BFIN_IN_INITCODE
@@ -235,32 +227,6 @@ static inline void serial_early_puts(const char *s)
#endif
.endm
-/* Recursively expand calls to _serial_putc for every byte
- * passed to us. Append a newline when we're all done.
- */
-.macro _serial_early_putc byte:req morebytes:vararg
-#ifdef CONFIG_DEBUG_EARLY_SERIAL
- R0 = \byte;
- call _serial_putc;
-.ifnb \morebytes
- _serial_early_putc \morebytes
-.else
-.if (\byte != '\n')
- _serial_early_putc '\n'
-.endif
-.endif
-#endif
-.endm
-
-/* Wrapper around recurisve _serial_early_putc macro which
- * simply prepends the string "Early: "
- */
-.macro serial_early_putc byte:req morebytes:vararg
-#ifdef CONFIG_DEBUG_EARLY_SERIAL
- _serial_early_putc 'E', 'a', 'r', 'l', 'y', ':', ' ', \byte, \morebytes
-#endif
-.endm
-
/* Since we embed the string right into our .text section, we need
* to find its address. We do this by getting our PC and adding 2
* bytes (which is the length of the jump instruction). Then we