serial: uartlite: Support for SERIAL_MULTI

Add support for SERIAL MULTI for uartlite.

Signed-off-by: Michal Simek <monstr@monstr.eu>

diff --git a/common/serial.c b/common/serial.c
index 7bfc861..5b83d6a 100644 (file)
--- 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..2dc6bd1 100644 (file)
--- a/drivers/serial/serial_xuartlite.c
+++ b/drivers/serial/serial_xuartlite.c
@@ -1,5 +1,5 @@
 /*
- * (C) Copyright 2008 Michal Simek <monstr@monstr.eu>
+ * (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
  * Clean driver and add xilinx constant from header file
  *
  * (C) Copyright 2004 Atmark Techno, Inc.
@@ -25,20 +25,71 @@
  */
 
 #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 {
+       unsigned int rx_fifo;
+       unsigned int tx_fifo;
+       unsigned int status;
+};
+
+static const struct uartlite *userial_ports[4] = {
+#ifdef XILINX_UARTLITE_BASEADDR
+       [0] = (struct uartlite *)XILINX_UARTLITE_BASEADDR,
+#endif
+#ifdef XILINX_UARTLITE_BASEADDR1
+       [1] = (struct uartlite *)XILINX_UARTLITE_BASEADDR1,
+#endif
+#ifdef XILINX_UARTLITE_BASEADDR2
+       [2] = (struct uartlite *)XILINX_UARTLITE_BASEADDR2,
+#endif
+#ifdef XILINX_UARTLITE_BASEADDR3
+       [3] = (struct uartlite *)XILINX_UARTLITE_BASEADDR3
+#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 (in_be32(&regs->status) & SR_TX_FIFO_FULL)
+               ;
+       out_be32(&regs->tx_fifo, 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 (!(in_be32(&regs->status) & SR_RX_FIFO_VALID_DATA))
+               ;
+       return in_be32(&regs->rx_fifo) & 0xff;
+}
+
+int uartlite_serial_tstc(const int port)
+{
+       struct uartlite *regs = userial_ports[port];
 
+       return in_be32(&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 +103,77 @@ 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/serial.h b/include/serial.h
index ff1ce99..5926244 100644 (file)
--- a/include/serial.h
+++ b/include/serial.h
@@ -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;