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 */
27 static struct uartlite
*userial_ports
[4] = {
28 #ifdef XILINX_UARTLITE_BASEADDR
29 [0] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR
,
31 #ifdef XILINX_UARTLITE_BASEADDR1
32 [1] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR1
,
34 #ifdef XILINX_UARTLITE_BASEADDR2
35 [2] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR2
,
37 #ifdef XILINX_UARTLITE_BASEADDR3
38 [3] = (struct uartlite
*)XILINX_UARTLITE_BASEADDR3
42 void uartlite_serial_putc(const char c
, const int port
)
44 struct uartlite
*regs
= userial_ports
[port
];
47 uartlite_serial_putc('\r', port
);
49 while (in_be32(®s
->status
) & SR_TX_FIFO_FULL
)
51 out_be32(®s
->tx_fifo
, c
& 0xff);
54 void uartlite_serial_puts(const char *s
, const int port
)
57 uartlite_serial_putc(*s
++, port
);
60 int uartlite_serial_getc(const int port
)
62 struct uartlite
*regs
= userial_ports
[port
];
64 while (!(in_be32(®s
->status
) & SR_RX_FIFO_VALID_DATA
))
66 return in_be32(®s
->rx_fifo
) & 0xff;
69 int uartlite_serial_tstc(const int port
)
71 struct uartlite
*regs
= userial_ports
[port
];
73 return in_be32(®s
->status
) & SR_RX_FIFO_VALID_DATA
;
76 static int uartlite_serial_init(const int port
)
78 if (userial_ports
[port
])
83 /* Multi serial device functions */
84 #define DECLARE_ESERIAL_FUNCTIONS(port) \
85 int userial##port##_init(void) \
86 { return uartlite_serial_init(port); } \
87 void userial##port##_setbrg(void) {} \
88 int userial##port##_getc(void) \
89 { return uartlite_serial_getc(port); } \
90 int userial##port##_tstc(void) \
91 { return uartlite_serial_tstc(port); } \
92 void userial##port##_putc(const char c) \
93 { uartlite_serial_putc(c, port); } \
94 void userial##port##_puts(const char *s) \
95 { uartlite_serial_puts(s, port); }
97 /* Serial device descriptor */
98 #define INIT_ESERIAL_STRUCTURE(port, __name) { \
100 .start = userial##port##_init, \
102 .setbrg = userial##port##_setbrg, \
103 .getc = userial##port##_getc, \
104 .tstc = userial##port##_tstc, \
105 .putc = userial##port##_putc, \
106 .puts = userial##port##_puts, \
109 DECLARE_ESERIAL_FUNCTIONS(0);
110 struct serial_device uartlite_serial0_device
=
111 INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
112 DECLARE_ESERIAL_FUNCTIONS(1);
113 struct serial_device uartlite_serial1_device
=
114 INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
115 DECLARE_ESERIAL_FUNCTIONS(2);
116 struct serial_device uartlite_serial2_device
=
117 INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
118 DECLARE_ESERIAL_FUNCTIONS(3);
119 struct serial_device uartlite_serial3_device
=
120 INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
122 __weak
struct serial_device
*default_serial_console(void)
124 if (userial_ports
[0])
125 return &uartlite_serial0_device
;
126 if (userial_ports
[1])
127 return &uartlite_serial1_device
;
128 if (userial_ports
[2])
129 return &uartlite_serial2_device
;
130 if (userial_ports
[3])
131 return &uartlite_serial3_device
;
136 void uartlite_serial_initialize(void)
138 #ifdef XILINX_UARTLITE_BASEADDR
139 serial_register(&uartlite_serial0_device
);
140 #endif /* XILINX_UARTLITE_BASEADDR */
141 #ifdef XILINX_UARTLITE_BASEADDR1
142 serial_register(&uartlite_serial1_device
);
143 #endif /* XILINX_UARTLITE_BASEADDR1 */
144 #ifdef XILINX_UARTLITE_BASEADDR2
145 serial_register(&uartlite_serial2_device
);
146 #endif /* XILINX_UARTLITE_BASEADDR2 */
147 #ifdef XILINX_UARTLITE_BASEADDR3
148 serial_register(&uartlite_serial3_device
);
149 #endif /* XILINX_UARTLITE_BASEADDR3 */