/*
- * (C) Copyright 2004 Atmark Techno, Inc.
+ * (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
+ * Clean driver and add xilinx constant from header file
*
+ * (C) Copyright 2004 Atmark Techno, Inc.
* Yasushi SHOJI <yashi@atmark-techno.com>
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
+#include <common.h>
+#include <asm/io.h>
+#include <linux/compiler.h>
+#include <serial.h>
-#ifdef CONFIG_XILINX_UARTLITE
+#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 */
-#include <asm/serial_xuartlite.h>
+struct uartlite {
+ unsigned int rx_fifo;
+ unsigned int tx_fifo;
+ unsigned int status;
+};
-/* FIXME: we should convert these to in32 and out32 */
-#define IO_WORD(offset) (*(volatile unsigned long *)(offset))
-#define IO_SERIAL(offset) IO_WORD(CONFIG_SERIAL_BASE + (offset))
+static 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
+};
-#define IO_SERIAL_RX_FIFO IO_SERIAL(XUL_RX_FIFO_OFFSET)
-#define IO_SERIAL_TX_FIFO IO_SERIAL(XUL_TX_FIFO_OFFSET)
-#define IO_SERIAL_STATUS IO_SERIAL(XUL_STATUS_REG_OFFSET)
-#define IO_SERIAL_CONTROL IO_SERIAL(XUL_CONTROL_REG_OFFSET)
-
-int serial_init(void)
+void uartlite_serial_putc(const char c, const int port)
{
- /* FIXME: Nothing for now. We should initialize fifo, etc */
- return 0;
+ struct uartlite *regs = userial_ports[port];
+
+ if (c == '\n')
+ uartlite_serial_putc('\r', port);
+
+ while (in_be32(®s->status) & SR_TX_FIFO_FULL)
+ ;
+ out_be32(®s->tx_fifo, c & 0xff);
}
-void serial_setbrg(void)
+void uartlite_serial_puts(const char *s, const int port)
{
- /* FIXME: what's this for? */
+ while (*s)
+ uartlite_serial_putc(*s++, port);
}
-void serial_putc(const char c)
+int uartlite_serial_getc(const int port)
{
- if (c == '\n') serial_putc('\r');
- while (IO_SERIAL_STATUS & XUL_SR_TX_FIFO_FULL);
- IO_SERIAL_TX_FIFO = (unsigned char) (c & 0xff);
+ struct uartlite *regs = userial_ports[port];
+
+ while (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA))
+ ;
+ return in_be32(®s->rx_fifo) & 0xff;
}
-void serial_puts(const char * s)
+int uartlite_serial_tstc(const int port)
{
- while (*s) {
- serial_putc(*s++);
- }
+ struct uartlite *regs = userial_ports[port];
+
+ return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA;
}
-int serial_getc(void)
+static int uartlite_serial_init(const int port)
{
- while (!(IO_SERIAL_STATUS & XUL_SR_RX_FIFO_VALID_DATA));
- return IO_SERIAL_RX_FIFO & 0xff;
+ if (userial_ports[port])
+ return 0;
+ return -1;
+}
+
+/* Multi serial device functions */
+#define DECLARE_ESERIAL_FUNCTIONS(port) \
+ int userial##port##_init(void) \
+ { return uartlite_serial_init(port); } \
+ 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 = __name, \
+ .start = userial##port##_init, \
+ .stop = NULL, \
+ .setbrg = userial##port##_setbrg, \
+ .getc = userial##port##_getc, \
+ .tstc = userial##port##_tstc, \
+ .putc = userial##port##_putc, \
+ .puts = userial##port##_puts, \
}
-int serial_tstc(void)
+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)
{
- return (IO_SERIAL_STATUS & XUL_SR_RX_FIFO_VALID_DATA);
+ if (userial_ports[0])
+ return &uartlite_serial0_device;
+ if (userial_ports[1])
+ return &uartlite_serial1_device;
+ if (userial_ports[2])
+ return &uartlite_serial2_device;
+ if (userial_ports[3])
+ return &uartlite_serial3_device;
+
+ return NULL;
}
-#endif /* CONFIG_MICROBLZE */
+void uartlite_serial_initialize(void)
+{
+#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 */
+}
projects / karo-tx-uboot.git / blobdiff