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 * SPDX-License-Identifier: GPL-2.0+
14 #include <linux/compiler.h>
17 #define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
18 #define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
19 #define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
21 #define ULITE_CONTROL_RST_TX 0x01
22 #define ULITE_CONTROL_RST_RX 0x02
31 static struct uartlite
*userial_ports
[4] = {
32 #ifdef XILINX_UARTLITE_BASEADDR
33 [0] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR
,
35 #ifdef XILINX_UARTLITE_BASEADDR1
36 [1] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR1
,
38 #ifdef XILINX_UARTLITE_BASEADDR2
39 [2] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR2
,
41 #ifdef XILINX_UARTLITE_BASEADDR3
42 [3] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR3
46 static void uartlite_serial_putc(const char c
, const int port
)
48 struct uartlite
*regs
= userial_ports
[port
];
51 uartlite_serial_putc('\r', port
);
53 while (in_be32(®s
->status
) & SR_TX_FIFO_FULL
)
55 out_be32(®s
->tx_fifo
, c
& 0xff);
58 static void uartlite_serial_puts(const char *s
, const int port
)
61 uartlite_serial_putc(*s
++, port
);
64 static int uartlite_serial_getc(const int port
)
66 struct uartlite
*regs
= userial_ports
[port
];
68 while (!(in_be32(®s
->status
) & SR_RX_FIFO_VALID_DATA
))
70 return in_be32(®s
->rx_fifo
) & 0xff;
73 static int uartlite_serial_tstc(const int port
)
75 struct uartlite
*regs
= userial_ports
[port
];
77 return in_be32(®s
->status
) & SR_RX_FIFO_VALID_DATA
;
80 static int uartlite_serial_init(const int port
)
82 struct uartlite
*regs
= userial_ports
[port
];
85 out_be32(®s
->control
, 0);
86 out_be32(®s
->control
,
87 ULITE_CONTROL_RST_RX
| ULITE_CONTROL_RST_TX
);
88 in_be32(®s
->control
);
95 /* Multi serial device functions */
96 #define DECLARE_ESERIAL_FUNCTIONS(port) \
97 static int userial##port##_init(void) \
98 { return uartlite_serial_init(port); } \
99 static void userial##port##_setbrg(void) {} \
100 static int userial##port##_getc(void) \
101 { return uartlite_serial_getc(port); } \
102 static int userial##port##_tstc(void) \
103 { return uartlite_serial_tstc(port); } \
104 static void userial##port##_putc(const char c) \
105 { uartlite_serial_putc(c, port); } \
106 static void userial##port##_puts(const char *s) \
107 { uartlite_serial_puts(s, port); }
109 /* Serial device descriptor */
110 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
112 .start = userial##port##_init, \
114 .setbrg = userial##port##_setbrg, \
115 .getc = userial##port##_getc, \
116 .tstc = userial##port##_tstc, \
117 .putc = userial##port##_putc, \
118 .puts = userial##port##_puts, \
121 DECLARE_ESERIAL_FUNCTIONS(0);
122 struct serial_device uartlite_serial0_device
=
123 INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
124 DECLARE_ESERIAL_FUNCTIONS(1);
125 struct serial_device uartlite_serial1_device
=
126 INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
127 DECLARE_ESERIAL_FUNCTIONS(2);
128 struct serial_device uartlite_serial2_device
=
129 INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
130 DECLARE_ESERIAL_FUNCTIONS(3);
131 struct serial_device uartlite_serial3_device
=
132 INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
134 __weak
struct serial_device
*default_serial_console(void)
136 if (userial_ports
[0])
137 return &uartlite_serial0_device
;
138 if (userial_ports
[1])
139 return &uartlite_serial1_device
;
140 if (userial_ports
[2])
141 return &uartlite_serial2_device
;
142 if (userial_ports
[3])
143 return &uartlite_serial3_device
;
148 void uartlite_serial_initialize(void)
150 #ifdef XILINX_UARTLITE_BASEADDR
151 serial_register(&uartlite_serial0_device
);
152 #endif /* XILINX_UARTLITE_BASEADDR */
153 #ifdef XILINX_UARTLITE_BASEADDR1
154 serial_register(&uartlite_serial1_device
);
155 #endif /* XILINX_UARTLITE_BASEADDR1 */
156 #ifdef XILINX_UARTLITE_BASEADDR2
157 serial_register(&uartlite_serial2_device
);
158 #endif /* XILINX_UARTLITE_BASEADDR2 */
159 #ifdef XILINX_UARTLITE_BASEADDR3
160 serial_register(&uartlite_serial3_device
);
161 #endif /* XILINX_UARTLITE_BASEADDR3 */