/*
- * (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
+ * (C) Copyright 2008 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>
*
- * SPDX-License-Identifier: GPL-2.0+
+ * 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
*/
#include <config.h>
-#include <common.h>
#include <asm/io.h>
-#include <linux/compiler.h>
-#include <serial.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 */
#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 ULITE_CONTROL_RST_TX 0x01
-#define ULITE_CONTROL_RST_RX 0x02
-
-struct uartlite {
- unsigned int rx_fifo;
- unsigned int tx_fifo;
- unsigned int status;
- unsigned int control;
-};
-
-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
-};
-
-static 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(®s->status) & SR_TX_FIFO_FULL)
- ;
- out_be32(®s->tx_fifo, c & 0xff);
-}
+#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)
-static void uartlite_serial_puts(const char *s, const int port)
+int serial_init(void)
{
- while (*s)
- uartlite_serial_putc(*s++, port);
+ /* FIXME: Nothing for now. We should initialize fifo, etc */
+ return 0;
}
-static int uartlite_serial_getc(const int port)
+void serial_setbrg(void)
{
- struct uartlite *regs = userial_ports[port];
-
- while (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA))
- ;
- return in_be32(®s->rx_fifo) & 0xff;
+ /* FIXME: what's this for? */
}
-static int uartlite_serial_tstc(const int port)
+void serial_putc(const char c)
{
- struct uartlite *regs = userial_ports[port];
-
- return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA;
+ 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));
}
-static int uartlite_serial_init(const int port)
+void serial_puts(const char * s)
{
- struct uartlite *regs = userial_ports[port];
-
- if (regs) {
- out_be32(®s->control, 0);
- out_be32(®s->control,
- ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX);
- in_be32(®s->control);
- return 0;
+ while (*s) {
+ serial_putc(*s++);
}
-
- return -1;
}
-/* Multi serial device functions */
-#define DECLARE_ESERIAL_FUNCTIONS(port) \
- static int userial##port##_init(void) \
- { return uartlite_serial_init(port); } \
- static void userial##port##_setbrg(void) {} \
- static int userial##port##_getc(void) \
- { return uartlite_serial_getc(port); } \
- static int userial##port##_tstc(void) \
- { return uartlite_serial_tstc(port); } \
- static void userial##port##_putc(const char c) \
- { uartlite_serial_putc(c, port); } \
- static 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, \
-}
-
-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)
+int serial_getc(void)
{
- 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;
+ while (!(in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA));
+ return in_be32((u32 *) UARTLITE_RX_FIFO) & 0xff;
}
-void uartlite_serial_initialize(void)
+int serial_tstc(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 */
+ return (in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA);
}
projects / platform / kernel / u-boot.git / blobdiff