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wdenk507bbe32004-04-18 21:13:41 +00001/*
Michal Simek49a23e42011-09-25 21:03:08 +00002 * (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
Michal Simek53ea9812008-07-11 10:10:31 +02003 * Clean driver and add xilinx constant from header file
wdenk507bbe32004-04-18 21:13:41 +00004 *
Michal Simek53ea9812008-07-11 10:10:31 +02005 * (C) Copyright 2004 Atmark Techno, Inc.
wdenk507bbe32004-04-18 21:13:41 +00006 * 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
Michal Simek53ea9812008-07-11 10:10:31 +020018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wdenk507bbe32004-04-18 21:13:41 +000019 * 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>
Michal Simek49a23e42011-09-25 21:03:08 +000028#include <common.h>
Michal Simek53ea9812008-07-11 10:10:31 +020029#include <asm/io.h>
Michal Simek49a23e42011-09-25 21:03:08 +000030#include <linux/compiler.h>
31#include <serial.h>
wdenk507bbe32004-04-18 21:13:41 +000032
Michal Simek53ea9812008-07-11 10:10:31 +020033#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
34#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
35#define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
wdenk507bbe32004-04-18 21:13:41 +000036
Michal Simek49a23e42011-09-25 21:03:08 +000037struct uartlite {
38 unsigned int rx_fifo;
39 unsigned int tx_fifo;
40 unsigned int status;
41};
wdenk507bbe32004-04-18 21:13:41 +000042
Michal Simek8cb9b232011-10-18 00:22:10 +000043static struct uartlite *userial_ports[4] = {
Michal Simek49a23e42011-09-25 21:03:08 +000044#ifdef XILINX_UARTLITE_BASEADDR
45 [0] = (struct uartlite *)XILINX_UARTLITE_BASEADDR,
46#endif
47#ifdef XILINX_UARTLITE_BASEADDR1
48 [1] = (struct uartlite *)XILINX_UARTLITE_BASEADDR1,
49#endif
50#ifdef XILINX_UARTLITE_BASEADDR2
51 [2] = (struct uartlite *)XILINX_UARTLITE_BASEADDR2,
52#endif
53#ifdef XILINX_UARTLITE_BASEADDR3
54 [3] = (struct uartlite *)XILINX_UARTLITE_BASEADDR3
55#endif
56};
57
58void uartlite_serial_putc(const char c, const int port)
59{
60 struct uartlite *regs = userial_ports[port];
61
62 if (c == '\n')
63 uartlite_serial_putc('\r', port);
64
65 while (in_be32(&regs->status) & SR_TX_FIFO_FULL)
66 ;
67 out_be32(&regs->tx_fifo, c & 0xff);
68}
69
70void uartlite_serial_puts(const char *s, const int port)
71{
72 while (*s)
73 uartlite_serial_putc(*s++, port);
74}
75
76int uartlite_serial_getc(const int port)
77{
78 struct uartlite *regs = userial_ports[port];
79
80 while (!(in_be32(&regs->status) & SR_RX_FIFO_VALID_DATA))
81 ;
82 return in_be32(&regs->rx_fifo) & 0xff;
83}
84
85int uartlite_serial_tstc(const int port)
86{
87 struct uartlite *regs = userial_ports[port];
88
89 return in_be32(&regs->status) & SR_RX_FIFO_VALID_DATA;
90}
91
Michal Simek25239e12012-07-02 10:32:18 +020092static int uartlite_serial_init(const int port)
93{
94 if (userial_ports[port])
95 return 0;
96 return -1;
97}
98
Michal Simek49a23e42011-09-25 21:03:08 +000099#if !defined(CONFIG_SERIAL_MULTI)
wdenk507bbe32004-04-18 21:13:41 +0000100int serial_init(void)
101{
Michal Simek25239e12012-07-02 10:32:18 +0200102 return uartlite_serial_init(0);
wdenk507bbe32004-04-18 21:13:41 +0000103}
104
105void serial_setbrg(void)
106{
107 /* FIXME: what's this for? */
108}
109
110void serial_putc(const char c)
111{
Michal Simek49a23e42011-09-25 21:03:08 +0000112 uartlite_serial_putc(c, 0);
wdenk507bbe32004-04-18 21:13:41 +0000113}
114
Michal Simek49a23e42011-09-25 21:03:08 +0000115void serial_puts(const char *s)
wdenk507bbe32004-04-18 21:13:41 +0000116{
Michal Simek49a23e42011-09-25 21:03:08 +0000117 uartlite_serial_puts(s, 0);
wdenk507bbe32004-04-18 21:13:41 +0000118}
119
120int serial_getc(void)
121{
Michal Simek49a23e42011-09-25 21:03:08 +0000122 return uartlite_serial_getc(0);
wdenk507bbe32004-04-18 21:13:41 +0000123}
124
125int serial_tstc(void)
126{
Michal Simek49a23e42011-09-25 21:03:08 +0000127 return uartlite_serial_tstc(0);
wdenk507bbe32004-04-18 21:13:41 +0000128}
Michal Simek49a23e42011-09-25 21:03:08 +0000129#endif
130
131#if defined(CONFIG_SERIAL_MULTI)
132/* Multi serial device functions */
133#define DECLARE_ESERIAL_FUNCTIONS(port) \
134 int userial##port##_init(void) \
Michal Simek25239e12012-07-02 10:32:18 +0200135 { return uartlite_serial_init(port); } \
Michal Simek49a23e42011-09-25 21:03:08 +0000136 void userial##port##_setbrg(void) {} \
137 int userial##port##_getc(void) \
138 { return uartlite_serial_getc(port); } \
139 int userial##port##_tstc(void) \
140 { return uartlite_serial_tstc(port); } \
141 void userial##port##_putc(const char c) \
142 { uartlite_serial_putc(c, port); } \
143 void userial##port##_puts(const char *s) \
144 { uartlite_serial_puts(s, port); }
145
146/* Serial device descriptor */
147#define INIT_ESERIAL_STRUCTURE(port, name) {\
148 name,\
149 userial##port##_init,\
150 NULL,\
151 userial##port##_setbrg,\
152 userial##port##_getc,\
153 userial##port##_tstc,\
154 userial##port##_putc,\
155 userial##port##_puts, }
156
157DECLARE_ESERIAL_FUNCTIONS(0);
158struct serial_device uartlite_serial0_device =
159 INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
160DECLARE_ESERIAL_FUNCTIONS(1);
161struct serial_device uartlite_serial1_device =
162 INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
163DECLARE_ESERIAL_FUNCTIONS(2);
164struct serial_device uartlite_serial2_device =
165 INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
166DECLARE_ESERIAL_FUNCTIONS(3);
167struct serial_device uartlite_serial3_device =
168 INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
169
170__weak struct serial_device *default_serial_console(void)
171{
Michal Simek25239e12012-07-02 10:32:18 +0200172 if (userial_ports[0])
173 return &uartlite_serial0_device;
174 if (userial_ports[1])
175 return &uartlite_serial1_device;
176 if (userial_ports[2])
177 return &uartlite_serial2_device;
178 if (userial_ports[3])
179 return &uartlite_serial3_device;
180
181 return NULL;
Michal Simek49a23e42011-09-25 21:03:08 +0000182}
183#endif /* CONFIG_SERIAL_MULTI */