2 * Copyright (c) 2003 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * Bus access structure. This structure holds the minimum information needed
34 * to access the UART. The rclk field, although not important to actually
35 * access the UART, is important for baudrate programming, delay loops and
36 * other timing related computations.
40 bus_space_handle_t bsh;
46 #define uart_regofs(bas, reg) ((reg) << (bas)->regshft)
48 #define uart_getreg(bas, reg) \
49 bus_space_read_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg))
50 #define uart_setreg(bas, reg, value) \
51 bus_space_write_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg), value)
54 * XXX we don't know the length of the bus space address range in use by
55 * the UART. Since barriers don't use the length field currently, we put
56 * a zero there for now.
58 #define uart_barrier(bas) \
59 bus_space_barrier((bas)->bst, (bas)->bsh, 0, 0, \
60 BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE)
63 * UART device classes.
67 extern struct uart_class uart_imx_class __attribute__((weak));
68 extern struct uart_class uart_ns8250_class __attribute__((weak));
69 extern struct uart_class uart_quicc_class __attribute__((weak));
70 extern struct uart_class uart_s3c2410_class __attribute__((weak));
71 extern struct uart_class uart_sab82532_class __attribute__((weak));
72 extern struct uart_class uart_sbbc_class __attribute__((weak));
73 extern struct uart_class uart_z8530_class __attribute__((weak));
74 extern struct uart_class uart_lpc_class __attribute__((weak));
75 extern struct uart_class uart_pl011_class __attribute__((weak));
76 extern struct uart_class uart_cdnc_class __attribute__((weak));
79 struct uart_class *uart_pc98_getdev(u_long port);
85 #define UART_FLAGS_CONSOLE(f) ((f) & 0x10)
86 #define UART_FLAGS_DBGPORT(f) ((f) & 0x80)
87 #define UART_FLAGS_FCR_RX_LOW(f) ((f) & 0x100)
88 #define UART_FLAGS_FCR_RX_MEDL(f) ((f) & 0x200)
89 #define UART_FLAGS_FCR_RX_MEDH(f) ((f) & 0x400)
90 #define UART_FLAGS_FCR_RX_HIGH(f) ((f) & 0x800)
93 * Data parity values (magical numbers related to ns8250).
95 #define UART_PARITY_NONE 0
96 #define UART_PARITY_ODD 1
97 #define UART_PARITY_EVEN 3
98 #define UART_PARITY_MARK 5
99 #define UART_PARITY_SPACE 7
101 #endif /* _DEV_UART_H_ */