blackfin: bf60x: add serial support
Add serial for bf60x.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
diff --git a/arch/blackfin/cpu/serial.c b/arch/blackfin/cpu/serial.c
index 64340ec..9847e9f 100644
--- a/arch/blackfin/cpu/serial.c
+++ b/arch/blackfin/cpu/serial.c
@@ -43,7 +43,6 @@
#include <serial.h>
#include <linux/compiler.h>
#include <asm/blackfin.h>
-#include <asm/mach-common/bits/uart.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -52,8 +51,8 @@
#include "serial.h"
#ifdef CONFIG_DEBUG_SERIAL
-static uint16_t cached_lsr[256];
-static uint16_t cached_rbr[256];
+static uart_lsr_t cached_lsr[256];
+static uart_lsr_t cached_rbr[256];
static size_t cache_count;
/* The LSR is read-to-clear on some parts, so we have to make sure status
@@ -61,10 +60,10 @@
* works around anomaly 05000099 at the same time by keeping a cumulative
* tally of all the status bits.
*/
-static uint16_t uart_lsr_save;
-static uint16_t uart_lsr_read(uint32_t uart_base)
+static uart_lsr_t uart_lsr_save;
+static uart_lsr_t uart_lsr_read(uint32_t uart_base)
{
- uint16_t lsr = bfin_read(&pUART->lsr);
+ uart_lsr_t lsr = _lsr_read(pUART);
uart_lsr_save |= (lsr & (OE|PE|FE|BI));
return lsr | uart_lsr_save;
}
@@ -72,20 +71,20 @@
static void uart_lsr_clear(uint32_t uart_base)
{
uart_lsr_save = 0;
- bfin_write(&pUART->lsr, bfin_read(&pUART->lsr) | -1);
+ _lsr_write(pUART, -1);
}
#else
/* When debugging is disabled, we only care about the DR bit, so if other
* bits get set/cleared, we don't really care since we don't read them
* anyways (and thus anomaly 05000099 is irrelevant).
*/
-static inline uint16_t uart_lsr_read(uint32_t uart_base)
+static inline uart_lsr_t uart_lsr_read(uint32_t uart_base)
{
- return bfin_read(&pUART->lsr);
+ return _lsr_read(pUART);
}
static void uart_lsr_clear(uint32_t uart_base)
{
- bfin_write(&pUART->lsr, bfin_read(&pUART->lsr) | -1);
+ _lsr_write(pUART, -1);
}
#endif
@@ -127,20 +126,14 @@
#ifdef CONFIG_DEBUG_SERIAL
/* grab & clear the LSR */
- uint16_t uart_lsr_val = uart_lsr_read(uart_base);
+ uart_lsr_t uart_lsr_val = uart_lsr_read(uart_base);
cached_lsr[cache_count] = uart_lsr_val;
cached_rbr[cache_count] = uart_rbr_val;
cache_count = (cache_count + 1) % ARRAY_SIZE(cached_lsr);
if (uart_lsr_val & (OE|PE|FE|BI)) {
- uint16_t dll, dlh;
printf("\n[SERIAL ERROR]\n");
- ACCESS_LATCH();
- dll = bfin_read(&pUART->dll);
- dlh = bfin_read(&pUART->dlh);
- ACCESS_PORT_IER();
- printf("\tDLL=0x%x DLH=0x%x\n", dll, dlh);
do {
--cache_count;
printf("\t%3zu: RBR=0x%02x LSR=0x%02x\n", cache_count,
@@ -160,6 +153,8 @@
# define LOOP(x)
#endif
+#if BFIN_UART_HW_VER < 4
+
LOOP(
static void uart_loop(uint32_t uart_base, int state)
{
@@ -178,6 +173,28 @@
}
)
+#else
+
+LOOP(
+static void uart_loop(uint32_t uart_base, int state)
+{
+ u32 control;
+
+ /* Drain the TX fifo first so bytes don't come back */
+ while (!(uart_lsr_read(uart_base) & TEMT))
+ continue;
+
+ control = bfin_read(&pUART->control);
+ if (state)
+ control |= LOOP_ENA | MRTS;
+ else
+ control &= ~(LOOP_ENA | MRTS);
+ bfin_write(&pUART->control, control);
+}
+)
+
+#endif
+
#ifdef CONFIG_SYS_BFIN_UART
static void uart_puts(uint32_t uart_base, const char *s)
@@ -246,16 +263,16 @@
LOOP(.loop = uart##n##_loop) \
};
-#ifdef UART0_DLL
+#ifdef UART0_RBR
DECL_BFIN_UART(0)
#endif
-#ifdef UART1_DLL
+#ifdef UART1_RBR
DECL_BFIN_UART(1)
#endif
-#ifdef UART2_DLL
+#ifdef UART2_RBR
DECL_BFIN_UART(2)
#endif
-#ifdef UART3_DLL
+#ifdef UART3_RBR
DECL_BFIN_UART(3)
#endif
@@ -274,16 +291,16 @@
void bfin_serial_initialize(void)
{
-#ifdef UART0_DLL
+#ifdef UART0_RBR
serial_register(&bfin_serial0_device);
#endif
-#ifdef UART1_DLL
+#ifdef UART1_RBR
serial_register(&bfin_serial1_device);
#endif
-#ifdef UART2_DLL
+#ifdef UART2_RBR
serial_register(&bfin_serial2_device);
#endif
-#ifdef UART3_DLL
+#ifdef UART3_RBR
serial_register(&bfin_serial3_device);
#endif
}
@@ -293,7 +310,7 @@
/* Symbol for our assembly to call. */
void serial_set_baud(uint32_t baud)
{
- serial_early_set_baud(UART_DLL, baud);
+ serial_early_set_baud(UART_BASE, baud);
}
/* Symbol for common u-boot code to call.
@@ -307,7 +324,7 @@
/* Symbol for our assembly to call. */
void serial_initialize(void)
{
- serial_early_init(UART_DLL);
+ serial_early_init(UART_BASE);
}
/* Symbol for common u-boot code to call. */
@@ -315,23 +332,23 @@
{
serial_initialize();
serial_setbrg();
- uart_lsr_clear(UART_DLL);
+ uart_lsr_clear(UART_BASE);
return 0;
}
int serial_tstc(void)
{
- return uart_tstc(UART_DLL);
+ return uart_tstc(UART_BASE);
}
int serial_getc(void)
{
- return uart_getc(UART_DLL);
+ return uart_getc(UART_BASE);
}
void serial_putc(const char c)
{
- uart_putc(UART_DLL, c);
+ uart_putc(UART_BASE, c);
}
void serial_puts(const char *s)
@@ -343,7 +360,7 @@
LOOP(
void serial_loop(int state)
{
- uart_loop(UART_DLL, state);
+ uart_loop(UART_BASE, state);
}
)