[U-Boot] [PATCH] serial: uartlite: Support for SERIAL_MULTI
Michal Simek
monstr at monstr.eu
Wed Aug 31 10:29:28 CEST 2011
Add support for SERIAL MULTI for Microblaze.
It can be used by other archs too.
Signed-off-by: Michal Simek <monstr at monstr.eu>
---
arch/microblaze/lib/board.c | 4 +
common/serial.c | 14 ++++
drivers/serial/serial_xuartlite.c | 138 +++++++++++++++++++++++++++++-----
include/configs/microblaze-generic.h | 2 +
include/serial.h | 9 ++-
5 files changed, 148 insertions(+), 19 deletions(-)
diff --git a/arch/microblaze/lib/board.c b/arch/microblaze/lib/board.c
index c00d96b..3b671b8 100644
--- a/arch/microblaze/lib/board.c
+++ b/arch/microblaze/lib/board.c
@@ -31,6 +31,7 @@
#include <watchdog.h>
#include <stdio_dev.h>
#include <net.h>
+#include <serial.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -111,6 +112,9 @@ void board_init (void)
monitor_flash_len = __end - __text_start;
+#ifdef CONFIG_SERIAL_MULTI
+ serial_initialize();
+#endif
/*
* The Malloc area is immediately below the monitor copy in DRAM
* aka CONFIG_SYS_MONITOR_BASE - Note there is no need for reloc_off
diff --git a/common/serial.c b/common/serial.c
index 995d268..df02fa5 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -108,6 +108,20 @@ void serial_initialize (void)
#if defined(CONFIG_SYS_BFIN_UART)
serial_register_bfin_uart();
#endif
+#if defined(CONFIG_XILINX_UARTLITE)
+# ifdef XILINX_UARTLITE_BASEADDR
+ serial_register(&uartlite_serial0_device);
+# endif /* XILINX_UARTLITE_BASEADDR */
+# ifdef XILINX_UARTLITE_BASEADDR1
+ serial_register(&uartlite_serial1_device);
+# endif /* XILINX_UARTLITE_BASEADDR1 */
+# ifdef XILINX_UARTLITE_BASEADDR2
+ serial_register(&uartlite_serial2_device);
+# endif /* XILINX_UARTLITE_BASEADDR2 */
+# ifdef XILINX_UARTLITE_BASEADDR3
+ serial_register(&uartlite_serial3_device);
+# endif /* XILINX_UARTLITE_BASEADDR3 */
+#endif /* CONFIG_XILINX_UARTLITE */
serial_assign (default_serial_console ()->name);
}
diff --git a/drivers/serial/serial_xuartlite.c b/drivers/serial/serial_xuartlite.c
index 00d0eaa..3e83217 100644
--- a/drivers/serial/serial_xuartlite.c
+++ b/drivers/serial/serial_xuartlite.c
@@ -25,20 +25,76 @@
*/
#include <config.h>
+#include <common.h>
#include <asm/io.h>
-
-#define RX_FIFO_OFFSET 0 /* receive FIFO, read only */
-#define TX_FIFO_OFFSET 4 /* transmit FIFO, write only */
-#define STATUS_REG_OFFSET 8 /* status register, read only */
+#include <linux/compiler.h>
+#include <serial.h>
#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
#define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
-#define UARTLITE_STATUS (CONFIG_SERIAL_BASE + STATUS_REG_OFFSET)
-#define UARTLITE_TX_FIFO (CONFIG_SERIAL_BASE + TX_FIFO_OFFSET)
-#define UARTLITE_RX_FIFO (CONFIG_SERIAL_BASE + RX_FIFO_OFFSET)
+struct uartlite {
+ volatile u32 rx_fifo;
+ volatile u32 tx_fifo;
+ volatile u32 status;
+};
+
+static struct uartlite *userial_ports[4] = {
+#ifdef XILINX_UARTLITE_BASEADDR
+ (struct uartlite *)XILINX_UARTLITE_BASEADDR,
+#else
+ NULL,
+#endif
+#ifdef XILINX_UARTLITE_BASEADDR1
+ (struct uartlite *)XILINX_UARTLITE_BASEADDR1,
+#else
+ NULL,
+#endif
+#ifdef XILINX_UARTLITE_BASEADDR2
+ (struct uartlite *)XILINX_UARTLITE_BASEADDR2,
+#else
+ NULL,
+#endif
+#ifdef XILINX_UARTLITE_BASEADDR3
+ (struct uartlite *)XILINX_UARTLITE_BASEADDR3
+#else
+ NULL
+#endif
+};
+
+void uartlite_serial_putc(const char c, const int port)
+{
+ struct uartlite *regs = userial_ports[port];
+ if (c == '\n')
+ uartlite_serial_putc('\r', port);
+ while (regs->status & SR_TX_FIFO_FULL)
+ ;
+ regs->tx_fifo = (unsigned char) (c & 0xff);
+}
+
+void uartlite_serial_puts(const char * s, const int port)
+{
+ while (*s) {
+ uartlite_serial_putc(*s++, port);
+ }
+}
+
+int uartlite_serial_getc(const int port)
+{
+ struct uartlite *regs = userial_ports[port];
+ while (!(regs->status & SR_RX_FIFO_VALID_DATA))
+ ;
+ return regs->rx_fifo & 0xff;
+}
+
+int uartlite_serial_tstc(const int port)
+{
+ struct uartlite *regs = userial_ports[port];
+ return regs->status & SR_RX_FIFO_VALID_DATA;
+}
+#if !defined(CONFIG_SERIAL_MULTI)
int serial_init(void)
{
/* FIXME: Nothing for now. We should initialize fifo, etc */
@@ -52,26 +108,72 @@ void serial_setbrg(void)
void serial_putc(const char c)
{
- if (c == '\n')
- serial_putc('\r');
- while (in_be32((u32 *) UARTLITE_STATUS) & SR_TX_FIFO_FULL);
- out_be32((u32 *) UARTLITE_TX_FIFO, (unsigned char) (c & 0xff));
+ uartlite_serial_putc(c, 0);
}
-void serial_puts(const char * s)
+void serial_puts(const char *s)
{
- while (*s) {
- serial_putc(*s++);
- }
+ uartlite_serial_puts(s, 0);
}
int serial_getc(void)
{
- while (!(in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA));
- return in_be32((u32 *) UARTLITE_RX_FIFO) & 0xff;
+ return uartlite_serial_getc(0);
}
int serial_tstc(void)
{
- return (in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA);
+ return uartlite_serial_tstc(0);
+}
+#endif
+
+#if defined(CONFIG_SERIAL_MULTI)
+/* Multi serial device functions */
+#define DECLARE_ESERIAL_FUNCTIONS(port) \
+ int userial##port##_init (void) {return(0);}\
+ void userial##port##_setbrg (void) {}\
+ int userial##port##_getc (void) {return uartlite_serial_getc(port);}\
+ int userial##port##_tstc (void) {return uartlite_serial_tstc(port);}\
+ void userial##port##_putc (const char c) {uartlite_serial_putc(c, port);}\
+ void userial##port##_puts (const char *s) {uartlite_serial_puts(s, port);}
+
+/* Serial device descriptor */
+#define INIT_ESERIAL_STRUCTURE(port,name) {\
+ name,\
+ userial##port##_init,\
+ NULL,\
+ userial##port##_setbrg,\
+ userial##port##_getc,\
+ userial##port##_tstc,\
+ userial##port##_putc,\
+ userial##port##_puts, }
+
+DECLARE_ESERIAL_FUNCTIONS(0);
+struct serial_device uartlite_serial0_device =
+ INIT_ESERIAL_STRUCTURE(0,"ttyUL0");
+DECLARE_ESERIAL_FUNCTIONS(1);
+struct serial_device uartlite_serial1_device =
+ INIT_ESERIAL_STRUCTURE(1,"ttyUL1");
+DECLARE_ESERIAL_FUNCTIONS(2);
+struct serial_device uartlite_serial2_device =
+ INIT_ESERIAL_STRUCTURE(2,"ttyUL2");
+DECLARE_ESERIAL_FUNCTIONS(3);
+struct serial_device uartlite_serial3_device =
+ INIT_ESERIAL_STRUCTURE(3,"ttyUL3");
+
+__weak struct serial_device *default_serial_console(void)
+{
+# ifdef XILINX_UARTLITE_BASEADDR
+ return &uartlite_serial0_device;
+# endif /* XILINX_UARTLITE_BASEADDR */
+# ifdef XILINX_UARTLITE_BASEADDR1
+ return &uartlite_serial1_device;
+# endif /* XILINX_UARTLITE_BASEADDR1 */
+# ifdef XILINX_UARTLITE_BASEADDR2
+ return &uartlite_serial2_device;
+# endif /* XILINX_UARTLITE_BASEADDR2 */
+# ifdef XILINX_UARTLITE_BASEADDR3
+ return &uartlite_serial3_device;
+# endif /* XILINX_UARTLITE_BASEADDR3 */
}
+#endif /* CONFIG_SERIAL_MULTI */
diff --git a/include/configs/microblaze-generic.h b/include/configs/microblaze-generic.h
index 0f46e62..1b60bfa 100644
--- a/include/configs/microblaze-generic.h
+++ b/include/configs/microblaze-generic.h
@@ -31,6 +31,8 @@
#define CONFIG_MICROBLAZE 1
#define MICROBLAZE_V5 1
+#define CONFIG_SERIAL_MULTI 1
+
/* uart */
#ifdef XILINX_UARTLITE_BASEADDR
# define CONFIG_XILINX_UARTLITE
diff --git a/include/serial.h b/include/serial.h
index ff1ce99..f047d2f 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -31,7 +31,7 @@ extern struct serial_device * default_serial_console (void);
defined(CONFIG_MB86R0x) || defined(CONFIG_MPC5xxx) || \
defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) || \
defined(CONFIG_MPC86xx) || defined(CONFIG_SYS_SC520) || \
- defined(CONFIG_TEGRA2)
+ defined(CONFIG_TEGRA2) || defined(CONFIG_MICROBLAZE)
extern struct serial_device serial0_device;
extern struct serial_device serial1_device;
#if defined(CONFIG_SYS_NS16550_SERIAL)
@@ -50,6 +50,13 @@ extern struct serial_device serial4_device;
extern struct serial_device serial6_device;
#endif
+#if defined(CONFIG_XILINX_UARTLITE)
+extern struct serial_device uartlite_serial0_device;
+extern struct serial_device uartlite_serial1_device;
+extern struct serial_device uartlite_serial2_device;
+extern struct serial_device uartlite_serial3_device;
+#endif
+
#if defined(CONFIG_S3C2410)
extern struct serial_device s3c24xx_serial0_device;
extern struct serial_device s3c24xx_serial1_device;
--
1.5.5.6
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