2 * (C) Copyright 2000-2006
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/processor.h>
30 #ifdef CONFIG_SERIAL_MULTI
34 DECLARE_GLOBAL_DATA_PTR;
38 #define SPU_BASE 0x40000000
40 #define spu_LineStat_rc 0x00 /* Line Status Register (Read/Clear) */
41 #define spu_LineStat_w 0x04 /* Line Status Register (Set) */
42 #define spu_Handshk_rc 0x08 /* Handshake Status Register (Read/Clear) */
43 #define spu_Handshk_w 0x0c /* Handshake Status Register (Set) */
44 #define spu_BRateDivh 0x10 /* Baud rate divisor high */
45 #define spu_BRateDivl 0x14 /* Baud rate divisor low */
46 #define spu_CtlReg 0x18 /* Control Register */
47 #define spu_RxCmd 0x1c /* Rx Command Register */
48 #define spu_TxCmd 0x20 /* Tx Command Register */
49 #define spu_RxBuff 0x24 /* Rx data buffer */
50 #define spu_TxBuff 0x24 /* Tx data buffer */
52 /*-----------------------------------------------------------------------------+
53 | Line Status Register.
54 +-----------------------------------------------------------------------------*/
55 #define asyncLSRport1 0x40000000
56 #define asyncLSRport1set 0x40000004
57 #define asyncLSRDataReady 0x80
58 #define asyncLSRFramingError 0x40
59 #define asyncLSROverrunError 0x20
60 #define asyncLSRParityError 0x10
61 #define asyncLSRBreakInterrupt 0x08
62 #define asyncLSRTxHoldEmpty 0x04
63 #define asyncLSRTxShiftEmpty 0x02
65 /*-----------------------------------------------------------------------------+
66 | Handshake Status Register.
67 +-----------------------------------------------------------------------------*/
68 #define asyncHSRport1 0x40000008
69 #define asyncHSRport1set 0x4000000c
70 #define asyncHSRDsr 0x80
71 #define asyncLSRCts 0x40
73 /*-----------------------------------------------------------------------------+
75 +-----------------------------------------------------------------------------*/
76 #define asyncCRport1 0x40000018
77 #define asyncCRNormal 0x00
78 #define asyncCRLoopback 0x40
79 #define asyncCRAutoEcho 0x80
80 #define asyncCRDtr 0x20
81 #define asyncCRRts 0x10
82 #define asyncCRWordLength7 0x00
83 #define asyncCRWordLength8 0x08
84 #define asyncCRParityDisable 0x00
85 #define asyncCRParityEnable 0x04
86 #define asyncCREvenParity 0x00
87 #define asyncCROddParity 0x02
88 #define asyncCRStopBitsOne 0x00
89 #define asyncCRStopBitsTwo 0x01
90 #define asyncCRDisableDtrRts 0x00
92 /*-----------------------------------------------------------------------------+
93 | Receiver Command Register.
94 +-----------------------------------------------------------------------------*/
95 #define asyncRCRport1 0x4000001c
96 #define asyncRCRDisable 0x00
97 #define asyncRCREnable 0x80
98 #define asyncRCRIntDisable 0x00
99 #define asyncRCRIntEnabled 0x20
100 #define asyncRCRDMACh2 0x40
101 #define asyncRCRDMACh3 0x60
102 #define asyncRCRErrorInt 0x10
103 #define asyncRCRPauseEnable 0x08
105 /*-----------------------------------------------------------------------------+
106 | Transmitter Command Register.
107 +-----------------------------------------------------------------------------*/
108 #define asyncTCRport1 0x40000020
109 #define asyncTCRDisable 0x00
110 #define asyncTCREnable 0x80
111 #define asyncTCRIntDisable 0x00
112 #define asyncTCRIntEnabled 0x20
113 #define asyncTCRDMACh2 0x40
114 #define asyncTCRDMACh3 0x60
115 #define asyncTCRTxEmpty 0x10
116 #define asyncTCRErrorInt 0x08
117 #define asyncTCRStopPause 0x04
118 #define asyncTCRBreakGen 0x02
120 /*-----------------------------------------------------------------------------+
121 | Miscellanies defines.
122 +-----------------------------------------------------------------------------*/
123 #define asyncTxBufferport1 0x40000024
124 #define asyncRxBufferport1 0x40000024
125 #define asyncDLABLsbport1 0x40000014
126 #define asyncDLABMsbport1 0x40000010
127 #define asyncXOFFchar 0x13
128 #define asyncXONchar 0x11
131 * Minimal serial functions needed to use one of the SMC ports
132 * as serial console interface.
135 int serial_init (void)
138 unsigned short br_reg;
140 br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
145 out_8((u8 *)SPU_BASE + spu_LineStat_rc, 0x78); /* Clear all bits in Line Status Reg */
146 out_8((u8 *)SPU_BASE + spu_BRateDivl, (br_reg & 0x00ff)); /* Set baud rate divisor... */
147 out_8((u8 *)SPU_BASE + spu_BRateDivh, ((br_reg & 0xff00) >> 8)); /* ... */
148 out_8((u8 *)SPU_BASE + spu_CtlReg, 0x08); /* Set 8 bits, no parity and 1 stop bit */
149 out_8((u8 *)SPU_BASE + spu_RxCmd, 0xb0); /* Enable Rx */
150 out_8((u8 *)SPU_BASE + spu_TxCmd, 0x9c); /* Enable Tx */
151 out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
152 val = in_8((u8 *)SPU_BASE + spu_RxBuff); /* Dummy read, to clear receiver */
157 void serial_setbrg (void)
159 unsigned short br_reg;
161 br_reg = ((((CONFIG_CPUCLOCK * 1000000) / 16) / gd->baudrate) - 1);
163 out_8((u8 *)SPU_BASE + spu_BRateDivl,
164 (br_reg & 0x00ff)); /* Set baud rate divisor... */
165 out_8((u8 *)SPU_BASE + spu_BRateDivh,
166 ((br_reg & 0xff00) >> 8)); /* ... */
169 void serial_putc (const char c)
174 /* load status from handshake register */
175 if (in_8((u8 *)SPU_BASE + spu_Handshk_rc) != 00)
176 out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
178 out_8((u8 *)SPU_BASE + spu_TxBuff, c); /* Put char */
180 while ((in_8((u8 *)SPU_BASE + spu_LineStat_rc) & 04) != 04) {
181 if (in_8((u8 *)SPU_BASE + spu_Handshk_rc) != 00)
182 out_8((u8 *)SPU_BASE + spu_Handshk_rc, 0xff); /* Clear Handshake */
186 void serial_puts (const char *s)
195 unsigned char status = 0;
198 status = in_8((u8 *)asyncLSRport1);
199 if ((status & asyncLSRDataReady) != 0x0) {
202 if ((status & ( asyncLSRFramingError |
203 asyncLSROverrunError |
204 asyncLSRParityError |
205 asyncLSRBreakInterrupt )) != 0) {
206 (void) out_8((u8 *)asyncLSRport1,
207 asyncLSRFramingError |
208 asyncLSROverrunError |
209 asyncLSRParityError |
210 asyncLSRBreakInterrupt );
213 return (0x000000ff & (int) in_8((u8 *)asyncRxBufferport1));
218 unsigned char status;
220 status = in_8((u8 *)asyncLSRport1);
221 if ((status & asyncLSRDataReady) != 0x0) {
224 if ((status & ( asyncLSRFramingError |
225 asyncLSROverrunError |
226 asyncLSRParityError |
227 asyncLSRBreakInterrupt )) != 0) {
228 (void) out_8((u8 *)asyncLSRport1,
229 asyncLSRFramingError |
230 asyncLSROverrunError |
231 asyncLSRParityError |
232 asyncLSRBreakInterrupt);
237 #endif /* CONFIG_IOP480 */