ppc4xx: Rework of 4xx serial driver (1)
This patch starts the rework of the PPC4xx serial driver. First we split
the file into two seperate files, one 4xx_uart.c with the 405/440 UART
handling code and the other one iop480_uart.c with the UART code for the
PLX-Tech IOP480 PPC (PPC403 based).
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/cpu/ppc4xx/serial.c b/cpu/ppc4xx/4xx_uart.c
similarity index 76%
rename from cpu/ppc4xx/serial.c
rename to cpu/ppc4xx/4xx_uart.c
index 0fdef7e..8560456 100644
--- a/cpu/ppc4xx/serial.c
+++ b/cpu/ppc4xx/4xx_uart.c
@@ -61,209 +61,6 @@
DECLARE_GLOBAL_DATA_PTR;
-/*****************************************************************************/
-#ifdef CONFIG_IOP480
-
-#define SPU_BASE 0x40000000
-
-#define spu_LineStat_rc 0x00 /* Line Status Register (Read/Clear) */
-#define spu_LineStat_w 0x04 /* Line Status Register (Set) */
-#define spu_Handshk_rc 0x08 /* Handshake Status Register (Read/Clear) */
-#define spu_Handshk_w 0x0c /* Handshake Status Register (Set) */
-#define spu_BRateDivh 0x10 /* Baud rate divisor high */
-#define spu_BRateDivl 0x14 /* Baud rate divisor low */
-#define spu_CtlReg 0x18 /* Control Register */
-#define spu_RxCmd 0x1c /* Rx Command Register */
-#define spu_TxCmd 0x20 /* Tx Command Register */
-#define spu_RxBuff 0x24 /* Rx data buffer */
-#define spu_TxBuff 0x24 /* Tx data buffer */
-
-/*-----------------------------------------------------------------------------+
- | Line Status Register.
- +-----------------------------------------------------------------------------*/
-#define asyncLSRport1 0x40000000
-#define asyncLSRport1set 0x40000004
-#define asyncLSRDataReady 0x80
-#define asyncLSRFramingError 0x40
-#define asyncLSROverrunError 0x20
-#define asyncLSRParityError 0x10
-#define asyncLSRBreakInterrupt 0x08
-#define asyncLSRTxHoldEmpty 0x04
-#define asyncLSRTxShiftEmpty 0x02
-
-/*-----------------------------------------------------------------------------+
- | Handshake Status Register.
- +-----------------------------------------------------------------------------*/
-#define asyncHSRport1 0x40000008
-#define asyncHSRport1set 0x4000000c
-#define asyncHSRDsr 0x80
-#define asyncLSRCts 0x40
-
-/*-----------------------------------------------------------------------------+
- | Control Register.
- +-----------------------------------------------------------------------------*/
-#define asyncCRport1 0x40000018
-#define asyncCRNormal 0x00
-#define asyncCRLoopback 0x40
-#define asyncCRAutoEcho 0x80
-#define asyncCRDtr 0x20
-#define asyncCRRts 0x10
-#define asyncCRWordLength7 0x00
-#define asyncCRWordLength8 0x08
-#define asyncCRParityDisable 0x00
-#define asyncCRParityEnable 0x04
-#define asyncCREvenParity 0x00
-#define asyncCROddParity 0x02
-#define asyncCRStopBitsOne 0x00
-#define asyncCRStopBitsTwo 0x01
-#define asyncCRDisableDtrRts 0x00
-
-/*-----------------------------------------------------------------------------+
- | Receiver Command Register.
- +-----------------------------------------------------------------------------*/
-#define asyncRCRport1 0x4000001c
-#define asyncRCRDisable 0x00
-#define asyncRCREnable 0x80
-#define asyncRCRIntDisable 0x00
-#define asyncRCRIntEnabled 0x20
-#define asyncRCRDMACh2 0x40
-#define asyncRCRDMACh3 0x60
-#define asyncRCRErrorInt 0x10
-#define asyncRCRPauseEnable 0x08
-
-/*-----------------------------------------------------------------------------+
- | Transmitter Command Register.
- +-----------------------------------------------------------------------------*/
-#define asyncTCRport1 0x40000020
-#define asyncTCRDisable 0x00
-#define asyncTCREnable 0x80
-#define asyncTCRIntDisable 0x00
-#define asyncTCRIntEnabled 0x20
-#define asyncTCRDMACh2 0x40
-#define asyncTCRDMACh3 0x60
-#define asyncTCRTxEmpty 0x10
-#define asyncTCRErrorInt 0x08
-#define asyncTCRStopPause 0x04
-#define asyncTCRBreakGen 0x02
-
-/*-----------------------------------------------------------------------------+
- | Miscellanies defines.
- +-----------------------------------------------------------------------------*/
-#define asyncTxBufferport1 0x40000024
-#define asyncRxBufferport1 0x40000024
-#define asyncDLABLsbport1 0x40000014
-#define asyncDLABMsbport1 0x40000010
-#define asyncXOFFchar 0x13
-#define asyncXONchar 0x11
-
-/*
- * Minimal serial functions needed to use one of the SMC ports
- * as serial console interface.
- */
-
-int serial_init (void)
-{
- volatile char val;
- unsigned short br_reg;
-
- br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
-
- /*
- * Init onboard UART
- */
- out8 (SPU_BASE + spu_LineStat_rc, 0x78); /* Clear all bits in Line Status Reg */
- out8 (SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */
- out8 (SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
- out8 (SPU_BASE + spu_CtlReg, 0x08); /* Set 8 bits, no parity and 1 stop bit */
- out8 (SPU_BASE + spu_RxCmd, 0xb0); /* Enable Rx */
- out8 (SPU_BASE + spu_TxCmd, 0x9c); /* Enable Tx */
- out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
- val = in8 (SPU_BASE + spu_RxBuff); /* Dummy read, to clear receiver */
-
- return (0);
-}
-
-void serial_setbrg (void)
-{
- unsigned short br_reg;
-
- br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
-
- out8 (SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */
- out8 (SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
-}
-
-void serial_putc (const char c)
-{
- if (c == '\n')
- serial_putc ('\r');
-
- /* load status from handshake register */
- if (in8 (SPU_BASE + spu_Handshk_rc) != 00)
- out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
-
- out8 (SPU_BASE + spu_TxBuff, c); /* Put char */
-
- while ((in8 (SPU_BASE + spu_LineStat_rc) & 04) != 04) {
- if (in8 (SPU_BASE + spu_Handshk_rc) != 00)
- out8 (SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
- }
-}
-
-void serial_puts (const char *s)
-{
- while (*s) {
- serial_putc (*s++);
- }
-}
-
-int serial_getc ()
-{
- unsigned char status = 0;
-
- while (1) {
- status = in8 (asyncLSRport1);
- if ((status & asyncLSRDataReady) != 0x0) {
- break;
- }
- if ((status & ( asyncLSRFramingError |
- asyncLSROverrunError |
- asyncLSRParityError |
- asyncLSRBreakInterrupt )) != 0) {
- (void) out8 (asyncLSRport1,
- asyncLSRFramingError |
- asyncLSROverrunError |
- asyncLSRParityError |
- asyncLSRBreakInterrupt );
- }
- }
- return (0x000000ff & (int) in8 (asyncRxBufferport1));
-}
-
-int serial_tstc ()
-{
- unsigned char status;
-
- status = in8 (asyncLSRport1);
- if ((status & asyncLSRDataReady) != 0x0) {
- return (1);
- }
- if ((status & ( asyncLSRFramingError |
- asyncLSROverrunError |
- asyncLSRParityError |
- asyncLSRBreakInterrupt )) != 0) {
- (void) out8 (asyncLSRport1,
- asyncLSRFramingError |
- asyncLSROverrunError |
- asyncLSRParityError |
- asyncLSRBreakInterrupt);
- }
- return 0;
-}
-
-#endif /* CONFIG_IOP480 */
-
-/*****************************************************************************/
#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
defined(CONFIG_405EX) || defined(CONFIG_440)
diff --git a/cpu/ppc4xx/Makefile b/cpu/ppc4xx/Makefile
index bc65aa0..1947249 100644
--- a/cpu/ppc4xx/Makefile
+++ b/cpu/ppc4xx/Makefile
@@ -28,11 +28,11 @@
START = start.o resetvec.o kgdb.o
SOBJS = dcr.o
COBJS = 40x_spd_sdram.o 44x_spd_ddr.o 44x_spd_ddr2.o \
- 4xx_pci.o 4xx_pcie.o 4xx_enet.o \
- bedbug_405.o commproc.o \
- cpu.o cpu_init.o fdt.o gpio.o i2c.o interrupts.o \
- miiphy.o ndfc.o sdram.o serial.o speed.o \
- tlb.o traps.o usb_ohci.o usb.o usbdev.o
+ 4xx_enet.o 4xx_pci.o 4xx_pcie.o 4xx_uart.o \
+ bedbug_405.o commproc.o cpu.o cpu_init.o \
+ fdt.o gpio.o i2c.o interrupts.o iop480_uart.o \
+ miiphy.o ndfc.o sdram.o speed.o \
+ tlb.o traps.o usb.o usb_ohci.o usbdev.o
SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/cpu/ppc4xx/iop480_uart.c b/cpu/ppc4xx/iop480_uart.c
new file mode 100644
index 0000000..8dd2267
--- /dev/null
+++ b/cpu/ppc4xx/iop480_uart.c
@@ -0,0 +1,238 @@
+/*
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <common.h>
+#include <commproc.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <watchdog.h>
+#include "vecnum.h"
+
+#ifdef CONFIG_SERIAL_MULTI
+#include <serial.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_IOP480
+
+#define SPU_BASE 0x40000000
+
+#define spu_LineStat_rc 0x00 /* Line Status Register (Read/Clear) */
+#define spu_LineStat_w 0x04 /* Line Status Register (Set) */
+#define spu_Handshk_rc 0x08 /* Handshake Status Register (Read/Clear) */
+#define spu_Handshk_w 0x0c /* Handshake Status Register (Set) */
+#define spu_BRateDivh 0x10 /* Baud rate divisor high */
+#define spu_BRateDivl 0x14 /* Baud rate divisor low */
+#define spu_CtlReg 0x18 /* Control Register */
+#define spu_RxCmd 0x1c /* Rx Command Register */
+#define spu_TxCmd 0x20 /* Tx Command Register */
+#define spu_RxBuff 0x24 /* Rx data buffer */
+#define spu_TxBuff 0x24 /* Tx data buffer */
+
+/*-----------------------------------------------------------------------------+
+ | Line Status Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncLSRport1 0x40000000
+#define asyncLSRport1set 0x40000004
+#define asyncLSRDataReady 0x80
+#define asyncLSRFramingError 0x40
+#define asyncLSROverrunError 0x20
+#define asyncLSRParityError 0x10
+#define asyncLSRBreakInterrupt 0x08
+#define asyncLSRTxHoldEmpty 0x04
+#define asyncLSRTxShiftEmpty 0x02
+
+/*-----------------------------------------------------------------------------+
+ | Handshake Status Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncHSRport1 0x40000008
+#define asyncHSRport1set 0x4000000c
+#define asyncHSRDsr 0x80
+#define asyncLSRCts 0x40
+
+/*-----------------------------------------------------------------------------+
+ | Control Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncCRport1 0x40000018
+#define asyncCRNormal 0x00
+#define asyncCRLoopback 0x40
+#define asyncCRAutoEcho 0x80
+#define asyncCRDtr 0x20
+#define asyncCRRts 0x10
+#define asyncCRWordLength7 0x00
+#define asyncCRWordLength8 0x08
+#define asyncCRParityDisable 0x00
+#define asyncCRParityEnable 0x04
+#define asyncCREvenParity 0x00
+#define asyncCROddParity 0x02
+#define asyncCRStopBitsOne 0x00
+#define asyncCRStopBitsTwo 0x01
+#define asyncCRDisableDtrRts 0x00
+
+/*-----------------------------------------------------------------------------+
+ | Receiver Command Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncRCRport1 0x4000001c
+#define asyncRCRDisable 0x00
+#define asyncRCREnable 0x80
+#define asyncRCRIntDisable 0x00
+#define asyncRCRIntEnabled 0x20
+#define asyncRCRDMACh2 0x40
+#define asyncRCRDMACh3 0x60
+#define asyncRCRErrorInt 0x10
+#define asyncRCRPauseEnable 0x08
+
+/*-----------------------------------------------------------------------------+
+ | Transmitter Command Register.
+ +-----------------------------------------------------------------------------*/
+#define asyncTCRport1 0x40000020
+#define asyncTCRDisable 0x00
+#define asyncTCREnable 0x80
+#define asyncTCRIntDisable 0x00
+#define asyncTCRIntEnabled 0x20
+#define asyncTCRDMACh2 0x40
+#define asyncTCRDMACh3 0x60
+#define asyncTCRTxEmpty 0x10
+#define asyncTCRErrorInt 0x08
+#define asyncTCRStopPause 0x04
+#define asyncTCRBreakGen 0x02
+
+/*-----------------------------------------------------------------------------+
+ | Miscellanies defines.
+ +-----------------------------------------------------------------------------*/
+#define asyncTxBufferport1 0x40000024
+#define asyncRxBufferport1 0x40000024
+#define asyncDLABLsbport1 0x40000014
+#define asyncDLABMsbport1 0x40000010
+#define asyncXOFFchar 0x13
+#define asyncXONchar 0x11
+
+/*
+ * Minimal serial functions needed to use one of the SMC ports
+ * as serial console interface.
+ */
+
+int serial_init (void)
+{
+ volatile char val;
+ unsigned short br_reg;
+
+ br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
+
+ /*
+ * Init onboard UART
+ */
+ out_8((u8 *)SPU_BASE + spu_LineStat_rc, 0x78); /* Clear all bits in Line Status Reg */
+ out_8((u8 *)SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */
+ out_8((u8 *)SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
+ out_8((u8 *)SPU_BASE + spu_CtlReg, 0x08); /* Set 8 bits, no parity and 1 stop bit */
+ out_8((u8 *)SPU_BASE + spu_RxCmd, 0xb0); /* Enable Rx */
+ out_8((u8 *)SPU_BASE + spu_TxCmd, 0x9c); /* Enable Tx */
+ out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
+ val = in_8((u8 *)SPU_BASE + spu_RxBuff); /* Dummy read, to clear receiver */
+
+ return (0);
+}
+
+void serial_setbrg (void)
+{
+ unsigned short br_reg;
+
+ br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
+
+ out_8((u8 *)SPU_BASE + spu_BRateDivl,
+ (br_reg & 0x00ff)); /* Set baud rate divisor... */
+ out_8((u8 *)SPU_BASE + spu_BRateDivh,
+ ((br_reg & 0xff00) >> 8)); /* ... */
+}
+
+void serial_putc (const char c)
+{
+ if (c == '\n')
+ serial_putc ('\r');
+
+ /* load status from handshake register */
+ if (in_8((u8 *)SPU_BASE + spu_Handshk_rc) != 00)
+ out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
+
+ out_8((u8 *)SPU_BASE + spu_TxBuff, c); /* Put char */
+
+ while ((in_8((u8 *)SPU_BASE + spu_LineStat_rc) & 04) != 04) {
+ if (in_8((u8 *)SPU_BASE + spu_Handshk_rc) != 00)
+ out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
+ }
+}
+
+void serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}
+
+int serial_getc ()
+{
+ unsigned char status = 0;
+
+ while (1) {
+ status = in_8((u8 *)asyncLSRport1);
+ if ((status & asyncLSRDataReady) != 0x0) {
+ break;
+ }
+ if ((status & ( asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt )) != 0) {
+ (void) out_8((u8 *)asyncLSRport1,
+ asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt );
+ }
+ }
+ return (0x000000ff & (int) in_8((u8 *)asyncRxBufferport1));
+}
+
+int serial_tstc ()
+{
+ unsigned char status;
+
+ status = in_8((u8 *)asyncLSRport1);
+ if ((status & asyncLSRDataReady) != 0x0) {
+ return (1);
+ }
+ if ((status & ( asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt )) != 0) {
+ (void) out_8((u8 *)asyncLSRport1,
+ asyncLSRFramingError |
+ asyncLSROverrunError |
+ asyncLSRParityError |
+ asyncLSRBreakInterrupt);
+ }
+ return 0;
+}
+
+#endif /* CONFIG_IOP480 */