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-rw-r--r--cpu/nios2/epcs.c38
-rw-r--r--cpu/nios2/exceptions.S3
-rw-r--r--cpu/nios2/interrupts.c18
-rw-r--r--cpu/nios2/serial.c26
-rw-r--r--cpu/nios2/sysid.c11
5 files changed, 59 insertions, 37 deletions
diff --git a/cpu/nios2/epcs.c b/cpu/nios2/epcs.c
index a8851e9..414c38c 100644
--- a/cpu/nios2/epcs.c
+++ b/cpu/nios2/epcs.c
@@ -25,7 +25,7 @@
#if defined(CFG_NIOS_EPCSBASE)
#include <command.h>
-#include <nios2.h>
+#include <asm/io.h>
#include <nios2-io.h>
#include <nios2-epcs.h>
@@ -72,8 +72,7 @@
*/
#define EPCS_TIMEOUT 100 /* 100 msec timeout */
-static nios_spi_t *epcs =
- (nios_spi_t *)CACHE_BYPASS(CFG_NIOS_EPCSBASE);
+static nios_spi_t *epcs = (nios_spi_t *)CFG_NIOS_EPCSBASE;
/***********************************************************************
* Device access
@@ -81,16 +80,20 @@ static nios_spi_t *epcs =
static int epcs_cs (int assert)
{
ulong start;
+ unsigned tmp;
+
if (assert) {
- epcs->control |= NIOS_SPI_SSO;
+ tmp = readl (&epcs->control);
+ writel (&epcs->control, tmp | NIOS_SPI_SSO);
} else {
/* Let all bits shift out */
start = get_timer (0);
- while ((epcs->status & NIOS_SPI_TMT) == 0)
+ while ((readl (&epcs->status) & NIOS_SPI_TMT) == 0)
if (get_timer (start) > EPCS_TIMEOUT)
return (-1);
- epcs->control &= ~NIOS_SPI_SSO;
+ tmp = readl (&epcs->control);
+ writel (&epcs->control, tmp & ~NIOS_SPI_SSO);
}
return (0);
}
@@ -100,10 +103,10 @@ static int epcs_tx (unsigned char c)
ulong start;
start = get_timer (0);
- while ((epcs->status & NIOS_SPI_TRDY) == 0)
+ while ((readl (&epcs->status) & NIOS_SPI_TRDY) == 0)
if (get_timer (start) > EPCS_TIMEOUT)
return (-1);
- epcs->txdata = c;
+ writel (&epcs->txdata, c);
return (0);
}
@@ -112,10 +115,10 @@ static int epcs_rx (void)
ulong start;
start = get_timer (0);
- while ((epcs->status & NIOS_SPI_RRDY) == 0)
+ while ((readl (&epcs->status) & NIOS_SPI_RRDY) == 0)
if (get_timer (start) > EPCS_TIMEOUT)
return (-1);
- return (epcs->rxdata);
+ return (readl (&epcs->rxdata));
}
static unsigned char bitrev[] = {
@@ -207,6 +210,21 @@ static struct epcs_devinfo_t devinfo[] = {
{ 0, 0, 0, 0, 0, 0 }
};
+int epcs_reset (void)
+{
+ /* When booting from an epcs controller, the epcs bootrom
+ * code may leave the slave select in an asserted state.
+ * This causes two problems: (1) The initial epcs access
+ * will fail -- not a big deal, and (2) a software reset
+ * will cause the bootrom code to hang since it does not
+ * ensure the select is negated prior to first access -- a
+ * big deal. Here we just negate chip select and everything
+ * gets better :-)
+ */
+ epcs_cs (0); /* Negate chip select */
+ return (0);
+}
+
epcs_devinfo_t *epcs_dev_find (void)
{
unsigned char buf[4];
diff --git a/cpu/nios2/exceptions.S b/cpu/nios2/exceptions.S
index d3b95cf..b9c7a58 100644
--- a/cpu/nios2/exceptions.S
+++ b/cpu/nios2/exceptions.S
@@ -30,6 +30,9 @@
.global _exception
+ .set noat
+ .set nobreak
+
_exception:
/* SAVE ALL REGS -- this allows trap and unimplemented
* instruction handlers to be coded conveniently in C
diff --git a/cpu/nios2/interrupts.c b/cpu/nios2/interrupts.c
index 4a6da58..4685161 100644
--- a/cpu/nios2/interrupts.c
+++ b/cpu/nios2/interrupts.c
@@ -27,6 +27,7 @@
#include <nios2.h>
#include <nios2-io.h>
+#include <asm/io.h>
#include <asm/ptrace.h>
#include <common.h>
#include <command.h>
@@ -79,7 +80,7 @@ void tmr_isr (void *arg)
/* Interrupt is cleared by writing anything to the
* status register.
*/
- tmr->status = 0;
+ writel (&tmr->status, 0);
timestamp += CFG_NIOS_TMRMS;
#ifdef CONFIG_STATUS_LED
status_led_tick(timestamp);
@@ -88,16 +89,17 @@ void tmr_isr (void *arg)
static void tmr_init (void)
{
- nios_timer_t *tmr =(nios_timer_t *)CACHE_BYPASS(CFG_NIOS_TMRBASE);
+ nios_timer_t *tmr =(nios_timer_t *)CFG_NIOS_TMRBASE;
+
+ writel (&tmr->status, 0);
+ writel (&tmr->control, 0);
+ writel (&tmr->control, NIOS_TIMER_STOP);
- tmr->control &= ~(NIOS_TIMER_START | NIOS_TIMER_ITO);
- tmr->control |= NIOS_TIMER_STOP;
#if defined(CFG_NIOS_TMRCNT)
- tmr->periodl = CFG_NIOS_TMRCNT & 0xffff;
- tmr->periodh = (CFG_NIOS_TMRCNT >> 16) & 0xffff;
+ writel (&tmr->periodl, CFG_NIOS_TMRCNT & 0xffff);
+ writel (&tmr->periodh, (CFG_NIOS_TMRCNT >> 16) & 0xffff);
#endif
- tmr->control |= ( NIOS_TIMER_ITO |
- NIOS_TIMER_CONT |
+ writel (&tmr->control, NIOS_TIMER_ITO | NIOS_TIMER_CONT |
NIOS_TIMER_START );
irq_install_handler (CFG_NIOS_TMRIRQ, tmr_isr, (void *)tmr);
}
diff --git a/cpu/nios2/serial.c b/cpu/nios2/serial.c
index 3d76603..0bd3821 100644
--- a/cpu/nios2/serial.c
+++ b/cpu/nios2/serial.c
@@ -24,7 +24,7 @@
#include <common.h>
#include <watchdog.h>
-#include <nios2.h>
+#include <asm/io.h>
#include <nios2-io.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -34,8 +34,7 @@ DECLARE_GLOBAL_DATA_PTR;
*-----------------------------------------------------------------*/
#if defined(CONFIG_CONSOLE_JTAG)
-static nios_jtag_t *jtag =
- (nios_jtag_t *)CACHE_BYPASS(CFG_NIOS_CONSOLE);
+static nios_jtag_t *jtag = (nios_jtag_t *)CFG_NIOS_CONSOLE;
void serial_setbrg( void ){ return; }
int serial_init( void ) { return(0);}
@@ -44,9 +43,9 @@ void serial_putc (char c)
{
unsigned val;
- while (NIOS_JTAG_WSPACE (jtag->control) == 0)
+ while (NIOS_JTAG_WSPACE ( readl (&jtag->control)) == 0)
WATCHDOG_RESET ();
- jtag->data = (unsigned char)c;
+ writel (&jtag->data, (unsigned char)c);
}
void serial_puts (const char *s)
@@ -57,7 +56,7 @@ void serial_puts (const char *s)
int serial_tstc (void)
{
- return (jtag->control & NIOS_JTAG_RRDY);
+ return ( readl (&jtag->control) & NIOS_JTAG_RRDY);
}
int serial_getc (void)
@@ -67,7 +66,7 @@ int serial_getc (void)
while (1) {
WATCHDOG_RESET ();
- val = jtag->data;
+ val = readl (&jtag->data);
if (val & NIOS_JTAG_RVALID)
break;
}
@@ -80,8 +79,7 @@ int serial_getc (void)
*-----------------------------------------------------------------*/
#else
-static nios_uart_t *uart = (nios_uart_t *)
- CACHE_BYPASS(CFG_NIOS_CONSOLE);
+static nios_uart_t *uart = (nios_uart_t *) CFG_NIOS_CONSOLE;
#if defined(CFG_NIOS_FIXEDBAUD)
@@ -98,7 +96,7 @@ void serial_setbrg (void)
unsigned div;
div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
- uart->divisor = div;
+ writel (&uart->divisor,div);
return;
}
@@ -118,9 +116,9 @@ void serial_putc (char c)
{
if (c == '\n')
serial_putc ('\r');
- while ((uart->status & NIOS_UART_TRDY) == 0)
+ while ((readl (&uart->status) & NIOS_UART_TRDY) == 0)
WATCHDOG_RESET ();
- uart->txdata = (unsigned char)c;
+ writel (&uart->txdata,(unsigned char)c);
}
void serial_puts (const char *s)
@@ -132,14 +130,14 @@ void serial_puts (const char *s)
int serial_tstc (void)
{
- return (uart->status & NIOS_UART_RRDY);
+ return (readl (&uart->status) & NIOS_UART_RRDY);
}
int serial_getc (void)
{
while (serial_tstc () == 0)
WATCHDOG_RESET ();
- return( uart->rxdata & 0x00ff );
+ return (readl (&uart->rxdata) & 0x00ff );
}
#endif /* CONFIG_JTAG_CONSOLE */
diff --git a/cpu/nios2/sysid.c b/cpu/nios2/sysid.c
index 2b7a569..b5a2959 100644
--- a/cpu/nios2/sysid.c
+++ b/cpu/nios2/sysid.c
@@ -26,20 +26,21 @@
#if defined (CFG_NIOS_SYSID_BASE)
#include <command.h>
-#include <nios2.h>
+#include <asm/io.h>
#include <nios2-io.h>
#include <linux/time.h>
void display_sysid (void)
{
- struct nios_sysid_t *sysid =
- (struct nios_sysid_t *)CACHE_BYPASS(CFG_NIOS_SYSID_BASE);
+ struct nios_sysid_t *sysid = (struct nios_sysid_t *)CFG_NIOS_SYSID_BASE;
struct tm t;
char asc[32];
+ time_t stamp;
- localtime_r ((time_t *)&sysid->timestamp, &t);
+ stamp = readl (&sysid->timestamp);
+ localtime_r (&stamp, &t);
asctime_r (&t, asc);
- printf ("SYSID : %08x, %s", sysid->id, asc);
+ printf ("SYSID : %08x, %s", readl (&sysid->id), asc);
}
generated by cgit v1.1 at 2024-11-16 16:30:25 +0000