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Commit | Line | Data |
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507bbe3e | 1 | /* |
53ea981c MS |
2 | * (C) Copyright 2008 Michal Simek <monstr@monstr.eu> |
3 | * Clean driver and add xilinx constant from header file | |
507bbe3e | 4 | * |
53ea981c | 5 | * (C) Copyright 2004 Atmark Techno, Inc. |
507bbe3e WD |
6 | * Yasushi SHOJI <yashi@atmark-techno.com> |
7 | * | |
8 | * See file CREDITS for list of people who contributed to this | |
9 | * project. | |
10 | * | |
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. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
53ea981c | 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
507bbe3e WD |
19 | * GNU General Public License for more details. |
20 | * | |
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, | |
24 | * MA 02111-1307 USA | |
25 | */ | |
26 | ||
27 | #include <config.h> | |
53ea981c | 28 | #include <asm/io.h> |
e35745bb | 29 | |
53ea981c MS |
30 | #define RX_FIFO_OFFSET 0 /* receive FIFO, read only */ |
31 | #define TX_FIFO_OFFSET 4 /* transmit FIFO, write only */ | |
32 | #define STATUS_REG_OFFSET 8 /* status register, read only */ | |
507bbe3e | 33 | |
53ea981c MS |
34 | #define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */ |
35 | #define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */ | |
36 | #define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */ | |
507bbe3e | 37 | |
53ea981c MS |
38 | #define UARTLITE_STATUS (CONFIG_SERIAL_BASE + STATUS_REG_OFFSET) |
39 | #define UARTLITE_TX_FIFO (CONFIG_SERIAL_BASE + TX_FIFO_OFFSET) | |
40 | #define UARTLITE_RX_FIFO (CONFIG_SERIAL_BASE + RX_FIFO_OFFSET) | |
507bbe3e WD |
41 | |
42 | int serial_init(void) | |
43 | { | |
44 | /* FIXME: Nothing for now. We should initialize fifo, etc */ | |
45 | return 0; | |
46 | } | |
47 | ||
48 | void serial_setbrg(void) | |
49 | { | |
50 | /* FIXME: what's this for? */ | |
51 | } | |
52 | ||
53 | void serial_putc(const char c) | |
54 | { | |
53ea981c MS |
55 | if (c == '\n') |
56 | serial_putc('\r'); | |
f2302d44 SR |
57 | while (in_be32((u32 *) UARTLITE_STATUS) & SR_TX_FIFO_FULL); |
58 | out_be32((u32 *) UARTLITE_TX_FIFO, (unsigned char) (c & 0xff)); | |
507bbe3e WD |
59 | } |
60 | ||
61 | void serial_puts(const char * s) | |
62 | { | |
63 | while (*s) { | |
64 | serial_putc(*s++); | |
65 | } | |
66 | } | |
67 | ||
68 | int serial_getc(void) | |
69 | { | |
f2302d44 SR |
70 | while (!(in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA)); |
71 | return in_be32((u32 *) UARTLITE_RX_FIFO) & 0xff; | |
507bbe3e WD |
72 | } |
73 | ||
74 | int serial_tstc(void) | |
75 | { | |
f2302d44 | 76 | return (in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA); |
507bbe3e | 77 | } |