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wernermisc/m1/patches/rtems/milkymist-new-uart.patch
Werner Almesberger 58da15e017 rtems patches: added new UART and IRQ rearrangement, plus include fix 
Some of the include paths don't work. Not sure whether my patch is a
correct fix or merely an awkward way to work around a problem that's
somewhere else.
2011-11-20 16:30:29 -03:00

258 lines
8.6 KiB
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Index: rtems/c/src/lib/libbsp/lm32/milkymist/include/system_conf.h
===================================================================
--- rtems.orig/c/src/lib/libbsp/lm32/milkymist/include/system_conf.h 2011-08-01 10:48:11.000000000 -0300
+++ rtems/c/src/lib/libbsp/lm32/milkymist/include/system_conf.h 2011-11-20 16:02:10.000000000 -0300
@@ -26,6 +26,16 @@
/* UART */
#define MM_UART_RXTX (0xe0000000)
#define MM_UART_DIV (0xe0000004)
+#define MM_UART_STAT (0xe0000008)
+#define MM_UART_CTRL (0xe000000c)
+
+#define UART_STAT_THRE (0x1)
+#define UART_STAT_RX_EVT (0x2)
+#define UART_STAT_TX_EVT (0x4)
+
+#define UART_CTRL_RX_INT (0x1)
+#define UART_CTRL_TX_INT (0x2)
+#define UART_CTRL_THRU (0x4)
/* Timers */
#define MM_TIMER1_COMPARE (0xe0001024)
@@ -225,8 +235,17 @@
/* MIDI */
#define MM_MIDI_RXTX (0xe000b000)
-#define MM_MIDI_DIVISOR (0xe000b004)
-#define MM_MIDI_THRU (0xe000b008)
+#define MM_MIDI_DIV (0xe000b004)
+#define MM_MIDI_STAT (0xe000b008)
+#define MM_MIDI_CTRL (0xe000b00c)
+
+#define MIDI_STAT_THRE (0x1)
+#define MIDI_STAT_RX_EVT (0x2)
+#define MIDI_STAT_TX_EVT (0x4)
+
+#define MIDI_CTRL_RX_INT (0x1)
+#define MIDI_CTRL_TX_INT (0x2)
+#define MIDI_CTRL_THRU (0x4)
/* IR */
#define MM_IR_RX (0xe000e000)
@@ -248,24 +267,22 @@
#define BT656_FILTER_INFRAME (0x4)
/* Interrupts */
-#define MM_IRQ_UARTRX (0)
-#define MM_IRQ_UARTTX (1)
-#define MM_IRQ_GPIO (2)
-#define MM_IRQ_TIMER0 (3)
-#define MM_IRQ_TIMER1 (4)
-#define MM_IRQ_AC97CRREQUEST (5)
-#define MM_IRQ_AC97CRREPLY (6)
-#define MM_IRQ_AC97DMAR (7)
-#define MM_IRQ_AC97DMAW (8)
-#define MM_IRQ_PFPU (9)
-#define MM_IRQ_TMU (10)
-#define MM_IRQ_ETHRX (11)
-#define MM_IRQ_ETHTX (12)
-#define MM_IRQ_VIDEOIN (13)
-#define MM_IRQ_MIDIRX (14)
-#define MM_IRQ_MIDITX (15)
-#define MM_IRQ_IR (16)
-#define MM_IRQ_USB (17)
+#define MM_IRQ_UART (0)
+#define MM_IRQ_GPIO (1)
+#define MM_IRQ_TIMER0 (2)
+#define MM_IRQ_TIMER1 (3)
+#define MM_IRQ_AC97CRREQUEST (4)
+#define MM_IRQ_AC97CRREPLY (5)
+#define MM_IRQ_AC97DMAR (6)
+#define MM_IRQ_AC97DMAW (7)
+#define MM_IRQ_PFPU (8)
+#define MM_IRQ_TMU (9)
+#define MM_IRQ_ETHRX (10)
+#define MM_IRQ_ETHTX (11)
+#define MM_IRQ_VIDEOIN (12)
+#define MM_IRQ_MIDI (13)
+#define MM_IRQ_IR (14)
+#define MM_IRQ_USB (15)
/* Flash layout */
#define FLASH_BASE (0x80000000)
Index: rtems/c/src/lib/libbsp/lm32/shared/milkymist_console/console.c
===================================================================
--- rtems.orig/c/src/lib/libbsp/lm32/shared/milkymist_console/console.c 2011-08-01 10:48:39.000000000 -0300
+++ rtems/c/src/lib/libbsp/lm32/shared/milkymist_console/console.c 2011-11-20 16:02:10.000000000 -0300
@@ -119,25 +119,24 @@
rtems_interrupt_level level;
rtems_interrupt_disable(level);
- BSP_uart_txbusy = true;
MM_WRITE(MM_UART_RXTX, *buf);
rtems_interrupt_enable(level);
return 0;
}
-static rtems_isr mmconsole_txdone(rtems_vector_number n)
-{
- BSP_uart_txbusy = false;
- lm32_interrupt_ack(1 << MM_IRQ_UARTTX);
- rtems_termios_dequeue_characters(tty, 1);
-}
-
-static rtems_isr mmconsole_rxdone(rtems_vector_number n)
+static rtems_isr mmconsole_interrupt(rtems_vector_number n)
{
char c;
- c = MM_READ(MM_UART_RXTX);
- lm32_interrupt_ack(1 << MM_IRQ_UARTRX);
- rtems_termios_enqueue_raw_characters(tty, &c, 1);
+ while (MM_READ(MM_UART_STAT) & UART_STAT_RX_EVT) {
+ c = MM_READ(MM_UART_RXTX);
+ MM_WRITE(MM_UART_STAT, UART_STAT_RX_EVT);
+ rtems_termios_enqueue_raw_characters(tty, &c, 1);
+ }
+ if (MM_READ(MM_UART_STAT) & UART_STAT_TX_EVT) {
+ MM_WRITE(MM_UART_STAT, UART_STAT_TX_EVT);
+ rtems_termios_dequeue_characters(tty, 1);
+ }
+ lm32_interrupt_ack(1 << MM_IRQ_UART);
}
static const rtems_termios_callbacks mmconsole_callbacks = {
@@ -166,10 +165,9 @@
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
- rtems_interrupt_catch(mmconsole_txdone, MM_IRQ_UARTTX, &dummy);
- rtems_interrupt_catch(mmconsole_rxdone, MM_IRQ_UARTRX, &dummy);
- bsp_interrupt_vector_enable(MM_IRQ_UARTTX);
- bsp_interrupt_vector_enable(MM_IRQ_UARTRX);
+ rtems_interrupt_catch(mmconsole_interrupt, MM_IRQ_UART, &dummy);
+ bsp_interrupt_vector_enable(MM_IRQ_UART);
+ MM_WRITE(MM_UART_CTRL, UART_CTRL_RX_INT|UART_CTRL_TX_INT);
return RTEMS_SUCCESSFUL;
}
Index: rtems/c/src/lib/libbsp/lm32/shared/milkymist_console/uart.c
===================================================================
--- rtems.orig/c/src/lib/libbsp/lm32/shared/milkymist_console/uart.c 2011-08-01 10:48:39.000000000 -0300
+++ rtems/c/src/lib/libbsp/lm32/shared/milkymist_console/uart.c 2011-11-20 16:02:10.000000000 -0300
@@ -17,8 +17,6 @@
#include "../include/system_conf.h"
#include "uart.h"
-bool BSP_uart_txbusy;
-
void BSP_uart_init(int baud)
{
MM_WRITE(MM_UART_DIV, CPU_FREQUENCY/baud/16);
@@ -26,40 +24,24 @@
void BSP_uart_polled_write(char ch)
{
- int ip;
rtems_interrupt_level level;
rtems_interrupt_disable(level);
- if (BSP_uart_txbusy) {
- /* wait for the end of the transmission by the IRQ-based driver */
- do {
- lm32_read_interrupts(ip);
- } while (!(ip & (1 << MM_IRQ_UARTTX)));
- lm32_interrupt_ack(1 << MM_IRQ_UARTTX);
- }
+ while(!(MM_READ(MM_UART_STAT) & UART_STAT_THRE));
MM_WRITE(MM_UART_RXTX, ch);
- do {
- lm32_read_interrupts(ip);
- } while (!(ip & (1 << MM_IRQ_UARTTX)));
- /* if TX was busy, do not ack the IRQ
- * so that the IRQ-based driver ISR is run */
- if (!BSP_uart_txbusy)
- lm32_interrupt_ack(1 << MM_IRQ_UARTTX);
+ while(!(MM_READ(MM_UART_STAT) & UART_STAT_THRE));
rtems_interrupt_enable(level);
}
int BSP_uart_polled_read(void)
{
- int ip;
char r;
rtems_interrupt_level level;
rtems_interrupt_disable(level);
- do {
- lm32_read_interrupts(ip);
- } while (!(ip & (1 << MM_IRQ_UARTRX)));
- lm32_interrupt_ack(1 << MM_IRQ_UARTRX);
+ while(!(MM_READ(MM_UART_STAT) & UART_STAT_RX_EVT));
r = MM_READ(MM_UART_RXTX);
+ MM_WRITE(MM_UART_STAT, UART_STAT_RX_EVT);
rtems_interrupt_enable(level);
return r;
Index: rtems/c/src/lib/libbsp/lm32/shared/milkymist_console/uart.h
===================================================================
--- rtems.orig/c/src/lib/libbsp/lm32/shared/milkymist_console/uart.h 2011-08-01 10:48:39.000000000 -0300
+++ rtems/c/src/lib/libbsp/lm32/shared/milkymist_console/uart.h 2011-11-20 16:02:10.000000000 -0300
@@ -1,21 +1,16 @@
/*
- * This file contains definitions for LatticeMico32 UART
+ * This file contains definitions for the Milkymist UART
*
* 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: uart.h,v 1.2 2011/08/01 13:48:39 joel Exp $
- *
- * COPYRIGHT (c) Yann Sionneau <yann.sionneau@telecom-sudparis.eu> (GSoC 2010)
- * Telecom SudParis
*/
#ifndef _BSPUART_H
#define _BSPUART_H
-extern bool BSP_uart_txbusy;
-
void BSP_uart_init(int baud);
void BSP_uart_polled_write(char ch);
int BSP_uart_polled_read(void);
Index: rtems/c/src/lib/libbsp/lm32/shared/milkymist_midi/midi.c
===================================================================
--- rtems.orig/c/src/lib/libbsp/lm32/shared/milkymist_midi/midi.c 2011-08-01 10:48:40.000000000 -0300
+++ rtems/c/src/lib/libbsp/lm32/shared/milkymist_midi/midi.c 2011-11-20 16:02:10.000000000 -0300
@@ -31,9 +31,12 @@
{
unsigned char msg;
- lm32_interrupt_ack(1 << MM_IRQ_MIDIRX);
- msg = MM_READ(MM_MIDI_RXTX);
- rtems_message_queue_send(midi_q, &msg, 1);
+ while (MM_READ(MM_MIDI_STAT) & MIDI_STAT_RX_EVT) {
+ msg = MM_READ(MM_MIDI_RXTX);
+ MM_WRITE(MM_MIDI_STAT, MIDI_STAT_RX_EVT);
+ rtems_message_queue_send(midi_q, &msg, 1);
+ }
+ lm32_interrupt_ack(1 << MM_IRQ_MIDI);
}
rtems_device_driver midi_initialize(
@@ -57,11 +60,10 @@
);
RTEMS_CHECK_SC(sc, "create MIDI queue");
- rtems_interrupt_catch(interrupt_handler, MM_IRQ_MIDIRX, &dummy);
- bsp_interrupt_vector_enable(MM_IRQ_MIDIRX);
-
+ rtems_interrupt_catch(interrupt_handler, MM_IRQ_MIDI, &dummy);
+ bsp_interrupt_vector_enable(MM_IRQ_MIDI);
/* Only MIDI THRU mode is supported atm */
- MM_WRITE(MM_MIDI_THRU, 1);
+ MM_WRITE(MM_MIDI_CTRL, MIDI_CTRL_RX_INT|MIDI_CTRL_THRU);
return RTEMS_SUCCESSFUL;
}
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