2 * (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
3 * Clean driver and add xilinx constant from header file
5 * (C) Copyright 2004 Atmark Techno, Inc.
6 * Yasushi SHOJI <yashi@atmark-techno.com>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #include <linux/compiler.h>
33 #define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
34 #define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
35 #define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
43 static struct uartlite
*userial_ports
[4] = {
44 #ifdef XILINX_UARTLITE_BASEADDR
45 [0] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR
,
47 #ifdef XILINX_UARTLITE_BASEADDR1
48 [1] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR1
,
50 #ifdef XILINX_UARTLITE_BASEADDR2
51 [2] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR2
,
53 #ifdef XILINX_UARTLITE_BASEADDR3
54 [3] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR3
58 void uartlite_serial_putc(const char c
, const int port
)
60 struct uartlite
*regs
= userial_ports
[port
];
63 uartlite_serial_putc('\r', port
);
65 while (in_be32(®s
->status
) & SR_TX_FIFO_FULL
)
67 out_be32(®s
->tx_fifo
, c
& 0xff);
70 void uartlite_serial_puts(const char *s
, const int port
)
73 uartlite_serial_putc(*s
++, port
);
76 int uartlite_serial_getc(const int port
)
78 struct uartlite
*regs
= userial_ports
[port
];
80 while (!(in_be32(®s
->status
) & SR_RX_FIFO_VALID_DATA
))
82 return in_be32(®s
->rx_fifo
) & 0xff;
85 int uartlite_serial_tstc(const int port
)
87 struct uartlite
*regs
= userial_ports
[port
];
89 return in_be32(®s
->status
) & SR_RX_FIFO_VALID_DATA
;
92 static int uartlite_serial_init(const int port
)
94 if (userial_ports
[port
])
99 /* Multi serial device functions */
100 #define DECLARE_ESERIAL_FUNCTIONS(port) \
101 int userial##port##_init(void) \
102 { return uartlite_serial_init(port); } \
103 void userial##port##_setbrg(void) {} \
104 int userial##port##_getc(void) \
105 { return uartlite_serial_getc(port); } \
106 int userial##port##_tstc(void) \
107 { return uartlite_serial_tstc(port); } \
108 void userial##port##_putc(const char c) \
109 { uartlite_serial_putc(c, port); } \
110 void userial##port##_puts(const char *s) \
111 { uartlite_serial_puts(s, port); }
113 /* Serial device descriptor */
114 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
116 .start = userial##port##_init, \
118 .setbrg = userial##port##_setbrg, \
119 .getc = userial##port##_getc, \
120 .tstc = userial##port##_tstc, \
121 .putc = userial##port##_putc, \
122 .puts = userial##port##_puts, \
125 DECLARE_ESERIAL_FUNCTIONS(0);
126 struct serial_device uartlite_serial0_device
=
127 INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
128 DECLARE_ESERIAL_FUNCTIONS(1);
129 struct serial_device uartlite_serial1_device
=
130 INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
131 DECLARE_ESERIAL_FUNCTIONS(2);
132 struct serial_device uartlite_serial2_device
=
133 INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
134 DECLARE_ESERIAL_FUNCTIONS(3);
135 struct serial_device uartlite_serial3_device
=
136 INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
138 __weak
struct serial_device
*default_serial_console(void)
140 if (userial_ports
[0])
141 return &uartlite_serial0_device
;
142 if (userial_ports
[1])
143 return &uartlite_serial1_device
;
144 if (userial_ports
[2])
145 return &uartlite_serial2_device
;
146 if (userial_ports
[3])
147 return &uartlite_serial3_device
;
152 void uartlite_serial_initialize(void)
154 #ifdef XILINX_UARTLITE_BASEADDR
155 serial_register(&uartlite_serial0_device
);
156 #endif /* XILINX_UARTLITE_BASEADDR */
157 #ifdef XILINX_UARTLITE_BASEADDR1
158 serial_register(&uartlite_serial1_device
);
159 #endif /* XILINX_UARTLITE_BASEADDR1 */
160 #ifdef XILINX_UARTLITE_BASEADDR2
161 serial_register(&uartlite_serial2_device
);
162 #endif /* XILINX_UARTLITE_BASEADDR2 */
163 #ifdef XILINX_UARTLITE_BASEADDR3
164 serial_register(&uartlite_serial3_device
);
165 #endif /* XILINX_UARTLITE_BASEADDR3 */