A number of changes which makes the UARTLITE driver suitable for use by other architectures (most notibly ppc405 on the Xilinx Virtex). - Add new config values CONFIG_XILINX_UARTLITE to enable the driver and CONFIG_XILINX_UARTLITE_BASE for specifying the base address - Remove Xilinx supplied driver files from include/asm-microblaze. They don't have GPL compatible copyright notices and they're not needed anyway. - Rework driver to use in_be32() and out_be32() macros for register access.
Tested on Xilinx ml403 with ppc405 design.
Signed-off-by: Grant Likely grant.likely@secretlab.ca
---
I have not tested this on Microblaze. Can somebody please verify for me?
Also can be pulled from: git://git.secretlab.ca/git/u-boot.git for-upstream
Thanks, g.
drivers/serial_xuartlite.c | 61 ++++-- .../asm-microblaze/arch-microblaze/xuartlite_l.h | 256 -------------------- include/asm-microblaze/serial_xuartlite.h | 25 -- include/configs/suzaku.h | 6 +- 4 files changed, 46 insertions(+), 302 deletions(-) delete mode 100644 include/asm-microblaze/arch-microblaze/xuartlite_l.h delete mode 100644 include/asm-microblaze/serial_xuartlite.h
diff --git a/drivers/serial_xuartlite.c b/drivers/serial_xuartlite.c index ed59abe..912744d 100644 --- a/drivers/serial_xuartlite.c +++ b/drivers/serial_xuartlite.c @@ -1,5 +1,7 @@ /* + * (C) Copyright 2007 Secret Lab Technologies Ltd. * (C) Copyright 2004 Atmark Techno, Inc. + * (C) Copyright 2002 Xilinx Inc. * * Yasushi SHOJI yashi@atmark-techno.com * @@ -24,22 +26,38 @@
#include <config.h>
-#ifdef CONFIG_MICROBLAZE +#ifdef CONFIG_XILINX_UARTLITE
-#include <asm/serial_xuartlite.h> +#include <asm/io.h>
-/* FIXME: we should convert these to in32 and out32 */ -#define IO_WORD(offset) (*(volatile unsigned long *)(offset)) -#define IO_SERIAL(offset) IO_WORD(CONFIG_SERIAL_BASE + (offset)) +/* UART Lite register offsets */ +#define XUL_REG_RX 0 /* receive FIFO, read only */ +#define XUL_REG_TX 4 /* transmit FIFO, write only */ +#define XUL_REG_STATUS 8 /* status register, read only */ +#define XUL_REG_CONTROL 12 /* control register, write only */ + +/* control register bit positions */ +#define XUL_CR_ENABLE_INTR 0x10 /* enable interrupt */ +#define XUL_CR_FIFO_RX_RESET 0x02 /* reset receive FIFO */ +#define XUL_CR_FIFO_TX_RESET 0x01 /* reset transmit FIFO */
-#define IO_SERIAL_RX_FIFO IO_SERIAL(XUL_RX_FIFO_OFFSET) -#define IO_SERIAL_TX_FIFO IO_SERIAL(XUL_TX_FIFO_OFFSET) -#define IO_SERIAL_STATUS IO_SERIAL(XUL_STATUS_REG_OFFSET) -#define IO_SERIAL_CONTROL IO_SERIAL(XUL_CONTROL_REG_OFFSET) +/* status register bit positions */ +#define XUL_SR_PARITY_ERROR 0x80 +#define XUL_SR_FRAMING_ERROR 0x40 +#define XUL_SR_OVERRUN_ERROR 0x20 +#define XUL_SR_INTR_ENABLED 0x10 /* interrupt enabled */ +#define XUL_SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */ +#define XUL_SR_TX_FIFO_EMPTY 0x04 /* transmit FIFO empty */ +#define XUL_SR_RX_FIFO_FULL 0x02 /* receive FIFO full */ +#define XUL_SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */ + +/* FIXME: we should convert these to in32 and out32 */ +#define xul_write(reg, val) out_be32((void*)CONFIG_XILINX_UARTLITE_BASE + reg, val) +#define xul_read(reg) in_be32((void*)CONFIG_XILINX_UARTLITE_BASE + reg)
int serial_init(void) { - /* FIXME: Nothing for now. We should initialize fifo, etc */ + xul_write(XUL_REG_CONTROL, XUL_CR_FIFO_RX_RESET | XUL_CR_FIFO_TX_RESET); return 0; }
@@ -50,27 +68,32 @@ void serial_setbrg(void)
void serial_putc(const char c) { - if (c == '\n') serial_putc('\r'); - while (IO_SERIAL_STATUS & XUL_SR_TX_FIFO_FULL); - IO_SERIAL_TX_FIFO = (unsigned char) (c & 0xff); + if (c == '\n') + serial_putc('\r'); + + /* spin for room in FIFO */ + while (xul_read(XUL_REG_STATUS) & XUL_SR_TX_FIFO_FULL); + + xul_write(XUL_REG_TX, c & 0xff); }
void serial_puts(const char * s) { - while (*s) { + while (*s) serial_putc(*s++); - } }
int serial_getc(void) { - while (!(IO_SERIAL_STATUS & XUL_SR_RX_FIFO_VALID_DATA)); - return IO_SERIAL_RX_FIFO & 0xff; + /* spin for data */ + while (!(xul_read(XUL_REG_STATUS) & XUL_SR_RX_FIFO_VALID_DATA)); + + return xul_read(XUL_REG_RX) & 0xff; }
int serial_tstc(void) { - return (IO_SERIAL_STATUS & XUL_SR_RX_FIFO_VALID_DATA); + return xul_read(XUL_REG_STATUS) & XUL_SR_RX_FIFO_VALID_DATA; }
-#endif /* CONFIG_MICROBLZE */ +#endif /* CONFIG_XILINX_UARTLITE */ diff --git a/include/asm-microblaze/arch-microblaze/xuartlite_l.h b/include/asm-microblaze/arch-microblaze/xuartlite_l.h deleted file mode 100644 index b381a0d..0000000 --- a/include/asm-microblaze/arch-microblaze/xuartlite_l.h +++ /dev/null @@ -1,256 +0,0 @@ -/***************************************************************************** -* -* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" -* AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND -* SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE, -* OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, -* APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION -* THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT, -* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE -* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY -* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE -* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR -* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF -* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE. -* -* (c) Copyright 2002 Xilinx Inc. -* All rights reserved. -* -*****************************************************************************/ -/****************************************************************************/ -/** -* -* @file xuartlite_l.h -* -* This header file contains identifiers and low-level driver functions (or -* macros) that can be used to access the device. High-level driver functions -* are defined in xuartlite.h. -* -* <pre> -* MODIFICATION HISTORY: -* -* Ver Who Date Changes -* ----- ---- -------- ----------------------------------------------- -* 1.00b rpm 04/25/02 First release -* </pre> -* -*****************************************************************************/ - -#ifndef XUARTLITE_L_H /* prevent circular inclusions */ -#define XUARTLITE_L_H /* by using protection macros */ - -/***************************** Include Files ********************************/ - -#include "xbasic_types.h" -#include "xio.h" - -/************************** Constant Definitions ****************************/ - -/* UART Lite register offsets */ - -#define XUL_RX_FIFO_OFFSET 0 /* receive FIFO, read only */ -#define XUL_TX_FIFO_OFFSET 4 /* transmit FIFO, write only */ -#define XUL_STATUS_REG_OFFSET 8 /* status register, read only */ -#define XUL_CONTROL_REG_OFFSET 12 /* control register, write only */ - -/* control register bit positions */ - -#define XUL_CR_ENABLE_INTR 0x10 /* enable interrupt */ -#define XUL_CR_FIFO_RX_RESET 0x02 /* reset receive FIFO */ -#define XUL_CR_FIFO_TX_RESET 0x01 /* reset transmit FIFO */ - -/* status register bit positions */ - -#define XUL_SR_PARITY_ERROR 0x80 -#define XUL_SR_FRAMING_ERROR 0x40 -#define XUL_SR_OVERRUN_ERROR 0x20 -#define XUL_SR_INTR_ENABLED 0x10 /* interrupt enabled */ -#define XUL_SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */ -#define XUL_SR_TX_FIFO_EMPTY 0x04 /* transmit FIFO empty */ -#define XUL_SR_RX_FIFO_FULL 0x02 /* receive FIFO full */ -#define XUL_SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */ - -/* the following constant specifies the size of the FIFOs, the size of the - * FIFOs includes the transmitter and receiver such that it is the total number - * of bytes that the UART can buffer - */ -#define XUL_FIFO_SIZE 16 - -/* Stop bits are fixed at 1. Baud, parity, and data bits are fixed on a - * per instance basis - */ -#define XUL_STOP_BITS 1 - -/* Parity definitions - */ -#define XUL_PARITY_NONE 0 -#define XUL_PARITY_ODD 1 -#define XUL_PARITY_EVEN 2 - -/**************************** Type Definitions ******************************/ - -/***************** Macros (Inline Functions) Definitions ********************/ - -/***************************************************************************** -* -* Low-level driver macros and functions. The list below provides signatures -* to help the user use the macros. -* -* void XUartLite_mSetControlReg(u32 BaseAddress, u32 Mask) -* u32 XUartLite_mGetControlReg(u32 BaseAddress) -* u32 XUartLite_mGetStatusReg(u32 BaseAddress) -* -* Xboolean XUartLite_mIsReceiveEmpty(u32 BaseAddress) -* Xboolean XUartLite_mIsTransmitFull(u32 BaseAddress) -* Xboolean XUartLite_mIsIntrEnabled(u32 BaseAddress) -* -* void XUartLite_mEnableIntr(u32 BaseAddress) -* void XUartLite_mDisableIntr(u32 BaseAddress) -* -* void XUartLite_SendByte(u32 BaseAddress, u8 Data); -* u8 XUartLite_RecvByte(u32 BaseAddress); -* -*****************************************************************************/ - -/****************************************************************************/ -/** -* -* Set the contents of the control register. Use the XUL_CR_* constants defined -* above to create the bit-mask to be written to the register. -* -* @param BaseAddress is the base address of the device -* @param Mask is the 32-bit value to write to the control register -* -* @return None. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mSetControlReg(BaseAddress, Mask) \ - XIo_Out32((BaseAddress) + XUL_CONTROL_REG_OFFSET, (Mask)) - - -/****************************************************************************/ -/** -* -* Get the contents of the control register. Use the XUL_CR_* constants defined -* above to interpret the bit-mask returned. -* -* @param BaseAddress is the base address of the device -* -* @return A 32-bit value representing the contents of the control register. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mGetControlReg(BaseAddress) \ - XIo_In32((BaseAddress) + XUL_CONTROL_REG_OFFSET) - - -/****************************************************************************/ -/** -* -* Get the contents of the status register. Use the XUL_SR_* constants defined -* above to interpret the bit-mask returned. -* -* @param BaseAddress is the base address of the device -* -* @return A 32-bit value representing the contents of the status register. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mGetStatusReg(BaseAddress) \ - XIo_In32((BaseAddress) + XUL_STATUS_REG_OFFSET) - - -/****************************************************************************/ -/** -* -* Check to see if the receiver has data. -* -* @param BaseAddress is the base address of the device -* -* @return XTRUE if the receiver is empty, XFALSE if there is data present. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mIsReceiveEmpty(BaseAddress) \ - (!(XUartLite_mGetStatusReg((BaseAddress)) & XUL_SR_RX_FIFO_VALID_DATA)) - - -/****************************************************************************/ -/** -* -* Check to see if the transmitter is full. -* -* @param BaseAddress is the base address of the device -* -* @return XTRUE if the transmitter is full, XFALSE otherwise. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mIsTransmitFull(BaseAddress) \ - (XUartLite_mGetStatusReg((BaseAddress)) & XUL_SR_TX_FIFO_FULL) - - -/****************************************************************************/ -/** -* -* Check to see if the interrupt is enabled. -* -* @param BaseAddress is the base address of the device -* -* @return XTRUE if the interrupt is enabled, XFALSE otherwise. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mIsIntrEnabled(BaseAddress) \ - (XUartLite_mGetStatusReg((BaseAddress)) & XUL_SR_INTR_ENABLED) - - -/****************************************************************************/ -/** -* -* Enable the device interrupt. Preserve the contents of the control register. -* -* @param BaseAddress is the base address of the device -* -* @return None. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mEnableIntr(BaseAddress) \ - XUartLite_mSetControlReg((BaseAddress), \ - XUartLite_mGetControlReg((BaseAddress)) | XUL_CR_ENABLE_INTR) - - -/****************************************************************************/ -/** -* -* Disable the device interrupt. Preserve the contents of the control register. -* -* @param BaseAddress is the base address of the device -* -* @return None. -* -* @note None. -* -*****************************************************************************/ -#define XUartLite_mDisableIntr(BaseAddress) \ - XUartLite_mSetControlReg((BaseAddress), \ - XUartLite_mGetControlReg((BaseAddress)) & ~XUL_CR_ENABLE_INTR) - - -/************************** Function Prototypes *****************************/ - -void XUartLite_SendByte(u32 BaseAddress, u8 Data); -u8 XUartLite_RecvByte(u32 BaseAddress); - - -#endif /* end of protection macro */ diff --git a/include/asm-microblaze/serial_xuartlite.h b/include/asm-microblaze/serial_xuartlite.h deleted file mode 100644 index 6cd1e83..0000000 --- a/include/asm-microblaze/serial_xuartlite.h +++ /dev/null @@ -1,25 +0,0 @@ -/* - * (C) Copyright 2004 Atmark Techno, Inc. - * - * Yasushi SHOJI yashi@atmark-techno.com - * - * 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 <asm/arch/xuartlite_l.h> diff --git a/include/configs/suzaku.h b/include/configs/suzaku.h index 8224555..b67a2c1 100644 --- a/include/configs/suzaku.h +++ b/include/configs/suzaku.h @@ -60,8 +60,10 @@ /* this must be included AFTER the definition of CONFIG_COMMANDS (if any) */ #include <cmd_confdefs.h>
-#define CFG_UART1_BASE (0xFFFF2000) -#define CONFIG_SERIAL_BASE CFG_UART1_BASE +/* Use Xilinx UARTLITE serial port */ +#define CFG_UART1_BASE (0xFFFF2000) +#define CONFIG_XILINX_UARTLITE 1 +#define CONFIG_XILINX_UARTLITE_BASE CFG_UART1_BASE
/* * Miscellaneous configurable options