forked from Imagelibrary/rtems
2009-11-21 Fernando Nicodemos <fgnicodemos@terra.com.br>
* Makefile.am, preinstall.am, at91rm9200/include/at91rm9200.h: Add initial support for USART on at91rm9200. * at91rm9200/include/at91rm9200_usart.h, at91rm9200/usart/usart.c: New files.
This commit is contained in:
Joel Sherrill
@@ -1,3 +1,10 @@
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2009-11-21 Fernando Nicodemos <fgnicodemos@terra.com.br>
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* Makefile.am, preinstall.am, at91rm9200/include/at91rm9200.h: Add
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initial support for USART on at91rm9200.
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* at91rm9200/include/at91rm9200_usart.h, at91rm9200/usart/usart.c:
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New files.
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2009-09-17 Joel Sherrill <joel.sherrill@oarcorp.com>
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* pxa255/ffuart/ffuart.c: Add BSP_poll_char.
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@@ -26,7 +26,7 @@ endif
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if pxa255
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include_HEADERS = pxa255/include/pxa255.h pxa255/include/ffuart.h
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##pxa255/clock
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## pxa255/clock
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noinst_PROGRAMS += pxa255/clock.rel
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pxa255_clock_rel_SOURCES = pxa255/clock/clock.c
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pxa255_clock_rel_CPPFLAGS = $(AM_CPPFLAGS)
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@@ -63,7 +63,8 @@ endif
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if at91rm9200
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include_HEADERS = at91rm9200/include/at91rm9200.h at91rm9200/include/at91rm9200_dbgu.h \
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at91rm9200/include/at91rm9200_emac.h at91rm9200/include/at91rm9200_gpio.h \
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at91rm9200/include/at91rm9200_mem.h at91rm9200/include/at91rm9200_pmc.h at91rm9200/include/bits.h
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at91rm9200/include/at91rm9200_mem.h at91rm9200/include/at91rm9200_pmc.h \
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at91rm9200/include/bits.h at91rm9200/include/at91rm9200_usart.h
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## at91rm9200/clock
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noinst_PROGRAMS += at91rm9200/clock.rel
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@@ -77,6 +78,12 @@ at91rm9200_dbgu_rel_SOURCES = at91rm9200/dbgu/dbgu.c
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at91rm9200_dbgu_rel_CPPFLAGS = $(AM_CPPFLAGS)
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at91rm9200_dbgu_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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## at91rm9200/usart
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noinst_PROGRAMS += at91rm9200/usart.rel
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at91rm9200_usart_rel_SOURCES = at91rm9200/usart/usart.c
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at91rm9200_usart_rel_CPPFLAGS = $(AM_CPPFLAGS)
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at91rm9200_usart_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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## at91rm9200/timer
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noinst_PROGRAMS += at91rm9200/timer.rel
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at91rm9200_timer_rel_SOURCES = at91rm9200/timer/timer.c
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@@ -1,16 +1,21 @@
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/*
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* Atmel AT91RM9200 Register definitions
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* Atmel AT91RM9200 Register definitions, used in KIT637_V6 (CSB637)
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*
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* Copyright (c) 2003 by Cogent Computer Systems
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* Written by Mike Kelly <mike@cogcomp.com>
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*
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*
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* Modified by Fernando Nicodemos <fgnicodemos@terra.com.br>
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* from NCB - Sistemas Embarcados Ltda. (Brazil)
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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*
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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*/
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#ifndef __AT91RM9200_H__
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#define __AT91RM9200_H__
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@@ -103,7 +108,7 @@ typedef volatile unsigned long vulong;
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#define AIC_SMR_SRC_EDGE_HI (3 << 5)
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/**************************************************************************/
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/* Debug Unit */
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/* Debug Unit */
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/**************************************************************************/
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#define DBGU_BASE 0xFFFFF200
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#define DBGU_REG(_x_) *(vulong *)(DBGU_BASE + _x_)
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@@ -122,6 +127,17 @@ typedef volatile unsigned long vulong;
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#define DBGU_C2R 0x44 /* Chip ID2 Register */
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#define DBGU_FNTR 0x48 /* Force NTRST Register */
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/**************************************************************************/
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/* USART 0-3 */
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/**************************************************************************/
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#define USART0_BASE 0xFFFC0000
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#define USART1_BASE 0xFFFC4000
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#define USART2_BASE 0xFFFC8000
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#define USART3_BASE 0xFFFCC000
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/**** The USART3_BASE at the AT91RM9200 Manual is wrong ****/
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/**** Manual revision: Rev. 1768H-ATARM–16-Jun-09 ****/
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//#define USART3_BASE 0xFFECC000
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/****************/
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/* System Timer */
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/****************/
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148
c/src/lib/libcpu/arm/at91rm9200/include/at91rm9200_usart.h
Normal file
148
c/src/lib/libcpu/arm/at91rm9200/include/at91rm9200_usart.h
Normal file
@@ -0,0 +1,148 @@
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/*
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* Atmel AT91RM9200_USART Register definitions, used in KIT637_V6 (CSB637)
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*
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* Copyright (c) 2003 by Cogent Computer Systems
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* Written by Mike Kelly <mike@cogcomp.com>
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*
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* Modified by Fernando Nicodemos <fgnicodemos@terra.com.br>
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* from NCB - Sistemas Embarcados Ltda. (Brazil)
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#ifndef __AT91RM9200_USART_H__
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#define __AT91RM9200_USART_H__
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#include <bits.h>
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/* Register Offsets */
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#define US_CR 0x00 /* Control Register */
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#define US_MR 0x04 /* Mode Register */
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#define US_IER 0x08 /* Interrupt Enable Register */
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#define US_IDR 0x0C /* Interrupt Disable Register */
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#define US_IMR 0x10 /* Interrupt Mask Register */
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#define US_SR 0x14 /* Channel Status Register */
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#define US_RHR 0x18 /* Receiver Holding Register */
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#define US_THR 0x1C /* Transmitter Holding Register */
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#define US_BRGR 0x20 /* Baud Rate Generator Register */
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#define US_RTOR 0x24 /* Receiver Time-out Register */
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#define US_TTGR 0x28 /* Transmitter Timeguard Register */
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#define US_C1R 0x40 /* Chip ID1 Register - FI DI Ratio Register */
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#define US_C2R 0x44 /* Chip ID2 Register - Number of Erros Register */
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#define US_FNTR 0x48 /* Force NTRST Register */
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#define US_IF 0x4C /* IrDA Filter Register */
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/* Bit Defines */
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/* Control Register, US_CR, Offset 0x00 */
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#define US_CR_RSTRX BIT2 /* 1 = Reset and disable receiver */
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#define US_CR_RSTTX BIT3 /* 1 = Reset and disable transmitter */
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#define US_CR_RXEN BIT4 /* 1 = Receiver enable */
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#define US_CR_RXDIS BIT5 /* 1 = Receiver disable */
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#define US_CR_TXEN BIT6 /* 1 = Transmitter enable */
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#define US_CR_TXDIS BIT7 /* 1 = Transmitter disable */
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#define US_CR_RSTSTA BIT8 /* 1 = Reset PARE, FRAME and OVRE in DBGU_SR. */
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#define US_CR_STTBRK BIT9 /* 1 = Start transmission of a Break */
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#define US_CR_STPBRK BIT10 /* 1 = Stop transmission of a Break */
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#define US_CR_STTTO BIT11 /* 1 = Start Time-out */
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#define US_CR_SENDA BIT12 /* 1 = Send Address - MDROP mode only */
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#define US_CR_RSTIT BIT13 /* 1 = Reset Iteration */
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#define US_CR_RSTNACK BIT14 /* 1 = Reset Non Acknowledge */
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#define US_CR_RETTO BIT15 /* 1 = Restart Time-out */
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#define US_CR_DTREN BIT16 /* 1 = Data Terminal Ready Enable - AT91RM9200 only */
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#define US_CR_DTRDIS BIT17 /* 1 = Data Terminal Ready Disable - AT91RM9200 only */
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#define US_CR_RTSEN BIT18 /* 1 = Request To Send Enable */
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#define US_CR_RTSDIS BIT19 /* 1 = Request To Send Disable */
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/* Mode Register. US_MR. Offset 0x04 */
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#define US_MR_USMODE (0xF << 0) /* Mode of the USART */
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#define US_MR_USMODE_NORMAL 0
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#define US_MR_USMODE_RS485 1
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#define US_MR_USMODE_HWHS 2
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#define US_MR_USMODE_MODEM 3
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#define US_MR_USMODE_ISO7816_T0 4
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#define US_MR_USMODE_ISO7816_T1 6
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#define US_MR_USMODE_IRDA 8
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#define US_MR_USCLKS (3 << 4) /* Clock Selection */
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#define US_MR_USCLKS_MCK (0 << 4)
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#define US_MR_USCLKS_MCK_DIV8 (1 << 4)
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#define US_MR_USCLKS_SCK (3 << 4)
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#define US_MR_CHRL (3 << 6) /* Character Length */
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#define US_MR_CHRL_5 (0 << 6)
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#define US_MR_CHRL_6 (1 << 6)
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#define US_MR_CHRL_7 (2 << 6)
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#define US_MR_CHRL_8 (3 << 6)
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#define US_MR_SYNC (1 << 8) /* Synchronous Mode Select */
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#define US_MR_PAR (7 << 9) /* Parity Type */
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#define US_MR_PAR_EVEN (0 << 9) /* Even Parity */
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#define US_MR_PAR_ODD (1 << 9) /* Odd Parity */
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#define US_MR_PAR_SPACE (2 << 9) /* Parity forced to 0 (Space) */
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#define US_MR_PAR_MARK (3 << 9) /* Parity forced to 1 (Mark) */
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#define US_MR_PAR_NONE (4 << 9) /* No Parity */
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#define US_MR_PAR_MDROP (6 << 9) /* Multi-drop mode */
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#define US_MR_NBSTOP (3 << 12) /* Number of Stop Bits */
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#define US_MR_NBSTOP_1 (0 << 12)
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#define US_MR_NBSTOP_1_5 (1 << 12)
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#define US_MR_NBSTOP_2 (2 << 12)
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#define US_MR_CHMODE (3 << 14) /* Channel Mode */
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#define US_MR_CHMODE_NORM (0 << 14) /* Normal Mode */
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#define US_MR_CHMODE_AUTO (1 << 14) /* Auto Echo: RXD drives TXD */
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#define US_MR_CHMODE_LOC (2 << 14) /* Local Loopback: TXD drives RXD */
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#define US_MR_CHMODE_REM (3 << 14) /* Remote Loopback: RXD pin connected to TXD pin. */
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#define US_MR_MSBF (1 << 16) /* Bit Order */
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#define US_MR_MODE9 (1 << 17) /* 9-bit Character Length */
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#define US_MR_CLKO (1 << 18) /* Clock Output Select */
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#define US_MR_OVER (1 << 19) /* Oversampling Mode */
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#define US_MR_INACK (1 << 20) /* Inhibit Non Acknowledge */
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#define US_MR_DSNACK (1 << 21) /* Disable Successive NACK */
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#define US_MR_MAX_ITER (7 << 24) /* Max Iterations */
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#define US_MR_FILTER (1 << 28) /* Infrared Receive Line Filter */
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/* Interrupt Enable Register, US_IER, Offset 0x08 */
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/* Interrupt Disable Register, US_IDR, Offset 0x0C */
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/* Interrupt Mask Register, US_IMR, Offset 0x10 */
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/* Channel Status Register, US_SR, Offset 0x14 */
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#define US_IER_RXRDY BIT0 /* RXRDY Interrupt */
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#define US_IER_TXRDY BIT1 /* TXRDY Interrupt */
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#define US_IER_RXBRK BIT2 /* End of Receive Transfer Interrupt */
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#define US_IER_ENDRX BIT3 /* End of Receiver Transfer */
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//#define US_IER_ENDTX BIT4 /* End of Transmit Interrupt */
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#define US_IER_OVRE BIT5 /* Overrun Interrupt */
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#define US_IER_FRAME BIT6 /* Framing Error Interrupt */
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#define US_IER_PARE BIT7 /* Parity Error */
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#define US_IER_TIMEOUT BIT8 /* Receiver Time-out */
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#define US_IER_TXEMPTY BIT9 /* Transmitter Empty */
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#define US_IER_ITERATION BIT10 /* Max number of Repetitions Reached */
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#define US_IER_TXBUFE BIT11 /* Transmission Buffer Empty */
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#define US_IER_RXBUFF BIT12 /* Reception Buffer Full */
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#define US_IER_NACK BIT13 /* Non Acknowledge */
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#define US_IER_RIIC BIT16 /* Ring Indicator Input Change [AT91RM9200 only] */
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#define US_IER_DSRIC BIT17 /* Data Set Ready Input Change [AT91RM9200 only] */
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#define US_IER_DCDIC BIT18 /* Data Carrier Detect Input Change [AT91RM9200 only] */
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#define US_IER_CTSIC BIT19 /* Clear to Send Input Change */
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#define US_IER_ALL 0xC0001AFB /* all assigned bits */
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/* FORCE_NTRST Register, US_FNTR, Offset 0x48 */
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#define US_FNTR_NTRST BIT0 /* 1 = Force NTRST low in JTAG */
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typedef struct {
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volatile uint32_t cr;
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volatile uint32_t mr;
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volatile uint32_t ier;
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volatile uint32_t idr;
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volatile uint32_t imr;
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volatile uint32_t sr;
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volatile uint32_t rhr;
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volatile uint32_t thr;
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volatile uint32_t brgr;
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volatile uint32_t _res0[7];
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volatile uint32_t cidr;
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volatile uint32_t exid;
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volatile uint32_t fnr;
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} at91rm9200_usart_regs_t;
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#endif /* __AT91RM9200_USART_H__ */
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274
c/src/lib/libcpu/arm/at91rm9200/usart/usart.c
Normal file
274
c/src/lib/libcpu/arm/at91rm9200/usart/usart.c
Normal file
@@ -0,0 +1,274 @@
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/*
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* Driver for AT91RM9200 USART ports
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*
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* COPYRIGHT (c) 2006-2009.
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* NCB - Sistemas Embarcados Ltda. (Brazil)
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* Fernando Nicodemos <fgnicodemos@terra.com.br>
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*
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* and
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*
|
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* COPYRIGHT (c) 1989-2009.
|
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* On-Line Applications Research Corporation (OAR).
|
||||
*
|
||||
* The license and distribution terms for this file may be
|
||||
* found in the file LICENSE in this distribution or at
|
||||
* http://www.rtems.com/license/LICENSE.
|
||||
*
|
||||
* $Id$
|
||||
*/
|
||||
|
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#include <bsp.h>
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#include <rtems/libio.h>
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#include <termios.h>
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#include <at91rm9200.h>
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#include <at91rm9200_usart.h>
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#include <at91rm9200_pmc.h>
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#include <rtems/bspIo.h>
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#include <libchip/serial.h>
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#include <libchip/sersupp.h>
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|
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/* static function prototypes */
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static int usart_first_open(int major, int minor, void *arg);
|
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static int usart_last_close(int major, int minor, void *arg);
|
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static int usart_read_polled(int minor);
|
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static int usart_write_polled_support(int minor, const char *buf, int len);
|
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static void usart_init(int minor);
|
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static void usart_write_polled(int minor, char c);
|
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static int usart_set_attributes(int minor, const struct termios *t);
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at91rm9200_usart_regs_t *usart_get_base(int minor);
|
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|
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/* Pointers to functions for handling the UART polled. */
|
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console_fns usart_polling_fns = {
|
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libchip_serial_default_probe, /* deviceProbe */
|
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usart_first_open, /* deviceFirstOpen */
|
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usart_last_close, /* deviceLastClose */
|
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usart_read_polled, /* deviceRead */
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usart_write_polled_support, /* deviceWrite */
|
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usart_init, /* deviceInitialize */
|
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usart_write_polled, /* deviceWritePolled */
|
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usart_set_attributes, /* deviceSetAttributes */
|
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FALSE /* TRUE if interrupt driven, FALSE if not. */
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};
|
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|
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at91rm9200_usart_regs_t *usart_get_base(int minor)
|
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{
|
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console_tbl *console_entry;
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at91rm9200_usart_regs_t *port;
|
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|
||||
console_entry = BSP_get_uart_from_minor(minor);
|
||||
|
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if (console_entry == NULL)
|
||||
return 0;
|
||||
|
||||
port = (at91rm9200_usart_regs_t *) console_entry->ulCtrlPort1;
|
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//printk( "minor=%d entry=%p port=%p\n", minor, console_entry, port );
|
||||
|
||||
return port;
|
||||
}
|
||||
|
||||
/*
|
||||
* Functions called via callbacks (i.e. the ones in uart_fns
|
||||
*/
|
||||
|
||||
/*
|
||||
* This is called the first time each device is opened. Since
|
||||
* the driver is polled, we don't have to do anything. If the driver
|
||||
* were interrupt driven, we'd enable interrupts here.
|
||||
*/
|
||||
static int usart_first_open(int major, int minor, void *arg)
|
||||
{
|
||||
at91rm9200_usart_regs_t *usart;
|
||||
|
||||
usart = usart_get_base(minor);
|
||||
if ( !usart )
|
||||
return -1;
|
||||
|
||||
/* XXX port isn't being initialized or enabled */
|
||||
|
||||
/* XXX I hope this is enough */
|
||||
usart->cr = (US_CR_RXEN | US_CR_TXEN);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* This is called the last time each device is closed. Since
|
||||
* the driver is polled, we don't have to do anything. If the driver
|
||||
* were interrupt driven, we'd disable interrupts here.
|
||||
*/
|
||||
static int usart_last_close(int major, int minor, void *arg)
|
||||
{
|
||||
at91rm9200_usart_regs_t *usart;
|
||||
|
||||
usart = usart_get_base(minor);
|
||||
if ( !usart )
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Read one character from UART.
|
||||
*
|
||||
* return -1 if there's no data, otherwise return
|
||||
* the character in lowest 8 bits of returned int.
|
||||
*/
|
||||
static int usart_read_polled(int minor)
|
||||
{
|
||||
at91rm9200_usart_regs_t *usart;
|
||||
|
||||
usart = usart_get_base(minor);
|
||||
if ( !usart )
|
||||
return -1;
|
||||
|
||||
/* if nothing ready return -1 */
|
||||
if ( (usart->sr & US_IER_RXBUFF) == 0 )
|
||||
return -1;
|
||||
|
||||
return usart->thr;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Write character out
|
||||
*/
|
||||
static void usart_write_polled(int minor, char c)
|
||||
{
|
||||
at91rm9200_usart_regs_t *usart;
|
||||
|
||||
usart = usart_get_base(minor);
|
||||
if ( !usart )
|
||||
return;
|
||||
|
||||
/* delay until TX empty */
|
||||
while ( (usart->sr & US_IER_TXEMPTY) == 0 )
|
||||
;
|
||||
|
||||
usart->thr = c;
|
||||
}
|
||||
|
||||
/*
|
||||
* Write buffer to UART
|
||||
*
|
||||
* return 1 on success, -1 on error
|
||||
*/
|
||||
static int usart_write_polled_support(int minor, const char *buf, int len)
|
||||
{
|
||||
at91rm9200_usart_regs_t *usart;
|
||||
int nwrite=0;
|
||||
|
||||
/*
|
||||
* Verify the minor number
|
||||
*/
|
||||
usart = usart_get_base(minor);
|
||||
if ( !usart )
|
||||
return -1;
|
||||
|
||||
/*
|
||||
* poll each byte in the string out of the port.
|
||||
*/
|
||||
while (nwrite < len) {
|
||||
usart_write_polled(minor, *buf++);
|
||||
nwrite++;
|
||||
}
|
||||
|
||||
/*
|
||||
* return the number of bytes written.
|
||||
*/
|
||||
return nwrite;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/* Set up the UART. */
|
||||
static void usart_init(int minor)
|
||||
{
|
||||
at91rm9200_usart_regs_t *usart;
|
||||
|
||||
usart = usart_get_base(minor);
|
||||
if ( !usart )
|
||||
return;
|
||||
|
||||
}
|
||||
|
||||
|
||||
/* This is for setting baud rate, bits, etc. */
|
||||
static int usart_set_attributes(int minor, const struct termios *t)
|
||||
{
|
||||
uint32_t brgr;
|
||||
uint32_t mode, baud, baud_requested;
|
||||
at91rm9200_usart_regs_t *usart;
|
||||
|
||||
usart = usart_get_base(minor);
|
||||
if ( !usart )
|
||||
return -1;
|
||||
|
||||
/* Get current mode register */
|
||||
mode = usart->mr & ~(US_MR_USMODE | US_MR_USCLKS | US_MR_CHRL
|
||||
| US_MR_PAR | US_MR_NBSTOP);
|
||||
|
||||
/* Byte size */
|
||||
switch (t->c_cflag & CSIZE){
|
||||
case CS5:
|
||||
mode |= US_MR_CHRL_5;
|
||||
break;
|
||||
case CS6:
|
||||
mode |= US_MR_CHRL_6;
|
||||
break;
|
||||
case CS7:
|
||||
mode |= US_MR_CHRL_7;
|
||||
break;
|
||||
default:
|
||||
mode |= US_MR_CHRL_8;
|
||||
break;
|
||||
}
|
||||
|
||||
/* Stop bits */
|
||||
if (t->c_cflag & CSTOPB){
|
||||
mode |= US_MR_NBSTOP_2; /* 2 stop bits */
|
||||
} else
|
||||
mode |= US_MR_NBSTOP_1; /* 1 stop bits */
|
||||
|
||||
/* Parity */
|
||||
if (t->c_cflag & PARENB){
|
||||
/* Mark or Space parity */
|
||||
if (t->c_cflag & PARODD){
|
||||
mode |= US_MR_PAR_ODD;
|
||||
} else
|
||||
mode |= US_MR_PAR_EVEN;
|
||||
} else
|
||||
mode |= US_MR_PAR_NONE;
|
||||
|
||||
baud_requested = t->c_cflag & CBAUD;
|
||||
|
||||
/* If not, set the dbgu console baud as USART baud default */
|
||||
if (!baud_requested)
|
||||
baud_requested = BSP_get_baud();
|
||||
|
||||
baud = rtems_termios_baud_to_number(baud_requested);
|
||||
|
||||
brgr = (at91rm9200_get_mck() / 16) / baud;
|
||||
|
||||
if (brgr > 65535){ /* BRGR is 16-bit, so switch to slower clock */
|
||||
brgr /= 8;
|
||||
mode |= US_MR_USCLKS_MCK_DIV8;
|
||||
}
|
||||
|
||||
usart->mr = mode;
|
||||
usart->brgr = brgr;
|
||||
}
|
||||
|
||||
/*
|
||||
* The following functions are not used by TERMIOS, but other RTEMS
|
||||
* functions use them instead.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Read from UART. This is used in the exit code, and can't
|
||||
* rely on interrupts.
|
||||
*/
|
||||
int usart_poll_read(int minor)
|
||||
{
|
||||
return usart_read_polled(minor);
|
||||
}
|
||||
@@ -70,6 +70,10 @@ $(PROJECT_INCLUDE)/bits.h: at91rm9200/include/bits.h $(PROJECT_INCLUDE)/$(dirsta
|
||||
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bits.h
|
||||
PREINSTALL_FILES += $(PROJECT_INCLUDE)/bits.h
|
||||
|
||||
$(PROJECT_INCLUDE)/at91rm9200_usart.h: at91rm9200/include/at91rm9200_usart.h $(PROJECT_INCLUDE)/$(dirstamp)
|
||||
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/at91rm9200_usart.h
|
||||
PREINSTALL_FILES += $(PROJECT_INCLUDE)/at91rm9200_usart.h
|
||||
|
||||
$(PROJECT_INCLUDE)/irq.h: at91rm9200/irq/irq.h $(PROJECT_INCLUDE)/$(dirstamp)
|
||||
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/irq.h
|
||||
PREINSTALL_FILES += $(PROJECT_INCLUDE)/irq.h
|
||||
|
||||
Reference in New Issue
Block a user