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-rw-r--r--include/ppc4xx.h10
-rw-r--r--post/cpu/ppc4xx/uart.c105
2 files changed, 51 insertions, 64 deletions
diff --git a/include/ppc4xx.h b/include/ppc4xx.h
index ee30a4ca3..5238d04aa 100644
--- a/include/ppc4xx.h
+++ b/include/ppc4xx.h
@@ -99,6 +99,16 @@
#endif /* 440EP/EPX 440GR/GRX 440SP/SPE 460EX/GT/SX 405EX*/
+/*
+ * Define ns16550 register offset for all PPC4xx SoC's. Some
+ * mostly FPGA based PPC4xx implementations use a different
+ * offset. So let's give them a chance to define their offset
+ * in the board config header.
+ */
+#if !defined(CONFIG_SYS_NS16550_REG_SIZE)
+#define CONFIG_SYS_NS16550_REG_SIZE 1
+#endif
+
#if defined(CONFIG_440)
#include <ppc440.h>
#else
diff --git a/post/cpu/ppc4xx/uart.c b/post/cpu/ppc4xx/uart.c
index be217fcf8..6b61cc191 100644
--- a/post/cpu/ppc4xx/uart.c
+++ b/post/cpu/ppc4xx/uart.c
@@ -4,6 +4,8 @@
*
* Author: Igor Lisitsin <igor@emcraft.com>
*
+ * Copyright 2010, Stefan Roese, DENX Software Engineering, sr@denx.de
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
@@ -24,6 +26,9 @@
*/
#include <common.h>
+#include <ppc4xx.h>
+#include <ns16550.h>
+#include <asm/io.h>
/*
* UART test
@@ -119,32 +124,23 @@
#define UDIV_MAX 32
#endif
-#define UART_RBR 0x00
-#define UART_THR 0x00
-#define UART_IER 0x01
-#define UART_IIR 0x02
-#define UART_FCR 0x02
-#define UART_LCR 0x03
-#define UART_MCR 0x04
-#define UART_LSR 0x05
-#define UART_MSR 0x06
-#define UART_SCR 0x07
-#define UART_DLL 0x00
-#define UART_DLM 0x01
+DECLARE_GLOBAL_DATA_PTR;
-/*
- * Line Status Register.
- */
-#define asyncLSRDataReady1 0x01
-#define asyncLSROverrunError1 0x02
-#define asyncLSRParityError1 0x04
-#define asyncLSRFramingError1 0x08
-#define asyncLSRBreakInterrupt1 0x10
-#define asyncLSRTxHoldEmpty1 0x20
-#define asyncLSRTxShiftEmpty1 0x40
-#define asyncLSRRxFifoError1 0x80
+static void uart_post_init_common(struct NS16550 *com_port, unsigned short bdiv)
+{
+ volatile char val;
-DECLARE_GLOBAL_DATA_PTR;
+ out_8(&com_port->lcr, 0x80); /* set DLAB bit */
+ out_8(&com_port->dll, bdiv); /* set baudrate divisor */
+ out_8(&com_port->dlm, bdiv >> 8); /* set baudrate divisor */
+ out_8(&com_port->lcr, 0x03); /* clear DLAB; set 8 bits, no parity */
+ out_8(&com_port->fcr, 0x00); /* disable FIFO */
+ out_8(&com_port->mcr, 0x10); /* enable loopback mode */
+ val = in_8(&com_port->lsr); /* clear line status */
+ val = in_8(&com_port->rbr); /* read receive buffer */
+ out_8(&com_port->scr, 0x00); /* set scratchpad */
+ out_8(&com_port->ier, 0x00); /* set interrupt enable reg */
+}
#if defined(CONFIG_440) || defined(CONFIG_405EX)
#if !defined(CONFIG_SYS_EXT_SERIAL_CLOCK)
@@ -190,19 +186,18 @@ static void serial_divs (int baudrate, unsigned long *pudiv,
}
#endif
-static int uart_post_init (unsigned long dev_base)
+static int uart_post_init (struct NS16550 *com_port)
{
unsigned long reg = 0;
unsigned long udiv;
unsigned short bdiv;
- volatile char val;
#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
unsigned long tmp;
#endif
int i;
for (i = 0; i < 3500; i++) {
- if (in8 (dev_base + UART_LSR) & asyncLSRTxHoldEmpty1)
+ if (in_8(&com_port->lsr) & UART_LSR_THRE)
break;
udelay (100);
}
@@ -239,34 +234,24 @@ static int uart_post_init (unsigned long dev_base)
MTREG(UART3_SDR, reg);
#endif
- out8(dev_base + UART_LCR, 0x80); /* set DLAB bit */
- out8(dev_base + UART_DLL, bdiv); /* set baudrate divisor */
- out8(dev_base + UART_DLM, bdiv >> 8); /* set baudrate divisor */
- out8(dev_base + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */
- out8(dev_base + UART_FCR, 0x00); /* disable FIFO */
- out8(dev_base + UART_MCR, 0x10); /* enable loopback mode */
- val = in8(dev_base + UART_LSR); /* clear line status */
- val = in8(dev_base + UART_RBR); /* read receive buffer */
- out8(dev_base + UART_SCR, 0x00); /* set scratchpad */
- out8(dev_base + UART_IER, 0x00); /* set interrupt enable reg */
+ uart_post_init_common(com_port, bdiv);
return 0;
}
#else /* CONFIG_440 */
-static int uart_post_init (unsigned long dev_base)
+static int uart_post_init (struct NS16550 *com_port)
{
unsigned long reg;
unsigned long tmp;
unsigned long clk;
unsigned long udiv;
unsigned short bdiv;
- volatile char val;
int i;
for (i = 0; i < 3500; i++) {
- if (in8 (dev_base + UART_LSR) & asyncLSRTxHoldEmpty1)
+ if (in_8(&com_port->lsr) & UART_LSR_THRE)
break;
udelay (100);
}
@@ -309,59 +294,51 @@ static int uart_post_init (unsigned long dev_base)
bdiv = (clk + tmp / 2) / tmp;
#endif /* CONFIG_405EZ */
- out8(dev_base + UART_LCR, 0x80); /* set DLAB bit */
- out8(dev_base + UART_DLL, bdiv); /* set baudrate divisor */
- out8(dev_base + UART_DLM, bdiv >> 8); /* set baudrate divisor */
- out8(dev_base + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */
- out8(dev_base + UART_FCR, 0x00); /* disable FIFO */
- out8(dev_base + UART_MCR, 0x10); /* enable loopback mode */
- val = in8(dev_base + UART_LSR); /* clear line status */
- val = in8(dev_base + UART_RBR); /* read receive buffer */
- out8(dev_base + UART_SCR, 0x00); /* set scratchpad */
- out8(dev_base + UART_IER, 0x00); /* set interrupt enable reg */
-
- return (0);
+ uart_post_init_common(com_port, bdiv);
+
+ return 0;
}
#endif /* CONFIG_440 */
-static void uart_post_putc (unsigned long dev_base, char c)
+static void uart_post_putc (struct NS16550 *com_port, char c)
{
int i;
- out8 (dev_base + UART_THR, c); /* put character out */
+ out_8(&com_port->thr, c); /* put character out */
/* Wait for transfer completion */
for (i = 0; i < 3500; i++) {
- if (in8 (dev_base + UART_LSR) & asyncLSRTxHoldEmpty1)
+ if (in_8(&com_port->lsr) & UART_LSR_THRE)
break;
udelay (100);
}
}
-static int uart_post_getc (unsigned long dev_base)
+static int uart_post_getc (struct NS16550 *com_port)
{
int i;
/* Wait for character available */
for (i = 0; i < 3500; i++) {
- if (in8 (dev_base + UART_LSR) & asyncLSRDataReady1)
+ if (in_8(&com_port->lsr) & UART_LSR_DR)
break;
udelay (100);
}
- return 0xff & in8 (dev_base + UART_RBR);
+
+ return 0xff & in_8(&com_port->rbr);
}
-static int test_ctlr (unsigned long dev_base, int index)
+static int test_ctlr (struct NS16550 *com_port, int index)
{
int res = -1;
char test_str[] = "*** UART Test String ***\r\n";
int i;
- uart_post_init (dev_base);
+ uart_post_init (com_port);
for (i = 0; i < sizeof (test_str) - 1; i++) {
- uart_post_putc (dev_base, test_str[i]);
- if (uart_post_getc (dev_base) != test_str[i])
+ uart_post_putc (com_port, test_str[i]);
+ if (uart_post_getc (com_port) != test_str[i])
goto done;
}
res = 0;
@@ -377,8 +354,8 @@ int uart_post_test (int flags)
int i, res = 0;
static unsigned long base[] = CONFIG_SYS_POST_UART_TABLE;
- for (i = 0; i < sizeof (base) / sizeof (base[0]); i++) {
- if (test_ctlr (base[i], i))
+ for (i = 0; i < ARRAY_SIZE(base); i++) {
+ if (test_ctlr((struct NS16550 *)base[i], i))
res = -1;
}
serial_reinit_all ();