1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* SuperH SCIF device driver.
* Copyright (C) 2007,2008,2010 Nobuhiro Iwamatsu
* Copyright (C) 2002 - 2008 Paul Mundt
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/processor.h>
#include "serial_sh.h"
#include <serial.h>
#include <linux/compiler.h>
#if defined(CONFIG_CONS_SCIF0)
# define SCIF_BASE SCIF0_BASE
#elif defined(CONFIG_CONS_SCIF1)
# define SCIF_BASE SCIF1_BASE
#elif defined(CONFIG_CONS_SCIF2)
# define SCIF_BASE SCIF2_BASE
#elif defined(CONFIG_CONS_SCIF3)
# define SCIF_BASE SCIF3_BASE
#elif defined(CONFIG_CONS_SCIF4)
# define SCIF_BASE SCIF4_BASE
#elif defined(CONFIG_CONS_SCIF5)
# define SCIF_BASE SCIF5_BASE
#elif defined(CONFIG_CONS_SCIF6)
# define SCIF_BASE SCIF6_BASE
#elif defined(CONFIG_CONS_SCIF7)
# define SCIF_BASE SCIF7_BASE
#else
# error "Default SCIF doesn't set....."
#endif
#if defined(CONFIG_SCIF_A)
#define SCIF_BASE_PORT PORT_SCIFA
#else
#define SCIF_BASE_PORT PORT_SCIF
#endif
static struct uart_port sh_sci = {
.membase = (unsigned char*)SCIF_BASE,
.mapbase = SCIF_BASE,
.type = SCIF_BASE_PORT,
};
static void sh_serial_setbrg(void)
{
DECLARE_GLOBAL_DATA_PTR;
sci_out(&sh_sci, SCBRR, SCBRR_VALUE(gd->baudrate, CONFIG_SYS_CLK_FREQ));
}
static int sh_serial_init(void)
{
sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci));
sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci));
sci_out(&sh_sci, SCSMR, 0);
sci_out(&sh_sci, SCSMR, 0);
sci_out(&sh_sci, SCFCR, SCFCR_RFRST|SCFCR_TFRST);
sci_in(&sh_sci, SCFCR);
sci_out(&sh_sci, SCFCR, 0);
serial_setbrg();
return 0;
}
#if defined(CONFIG_CPU_SH7760) || \
defined(CONFIG_CPU_SH7780) || \
defined(CONFIG_CPU_SH7785) || \
defined(CONFIG_CPU_SH7786)
static int scif_rxfill(struct uart_port *port)
{
return sci_in(port, SCRFDR) & 0xff;
}
#elif defined(CONFIG_CPU_SH7763)
static int scif_rxfill(struct uart_port *port)
{
if ((port->mapbase == 0xffe00000) ||
(port->mapbase == 0xffe08000)) {
/* SCIF0/1*/
return sci_in(port, SCRFDR) & 0xff;
} else {
/* SCIF2 */
return sci_in(port, SCFDR) & SCIF2_RFDC_MASK;
}
}
#elif defined(CONFIG_ARCH_SH7372)
static int scif_rxfill(struct uart_port *port)
{
if (port->type == PORT_SCIFA)
return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
else
return sci_in(port, SCRFDR);
}
#else
static int scif_rxfill(struct uart_port *port)
{
return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
}
#endif
static int serial_rx_fifo_level(void)
{
return scif_rxfill(&sh_sci);
}
void serial_raw_putc(const char c)
{
while (1) {
/* Tx fifo is empty */
if (sci_in(&sh_sci, SCxSR) & SCxSR_TEND(&sh_sci))
break;
}
sci_out(&sh_sci, SCxTDR, c);
sci_out(&sh_sci, SCxSR, sci_in(&sh_sci, SCxSR) & ~SCxSR_TEND(&sh_sci));
}
static void sh_serial_putc(const char c)
{
if (c == '\n')
serial_raw_putc('\r');
serial_raw_putc(c);
}
static int sh_serial_tstc(void)
{
return serial_rx_fifo_level() ? 1 : 0;
}
void handle_error(void)
{
sci_in(&sh_sci, SCxSR);
sci_out(&sh_sci, SCxSR, SCxSR_ERROR_CLEAR(&sh_sci));
sci_in(&sh_sci, SCLSR);
sci_out(&sh_sci, SCLSR, 0x00);
}
int serial_getc_check(void)
{
unsigned short status;
status = sci_in(&sh_sci, SCxSR);
if (status & SCIF_ERRORS)
handle_error();
if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci))
handle_error();
return status & (SCIF_DR | SCxSR_RDxF(&sh_sci));
}
static int sh_serial_getc(void)
{
unsigned short status;
char ch;
while (!serial_getc_check())
;
ch = sci_in(&sh_sci, SCxRDR);
status = sci_in(&sh_sci, SCxSR);
sci_out(&sh_sci, SCxSR, SCxSR_RDxF_CLEAR(&sh_sci));
if (status & SCIF_ERRORS)
handle_error();
if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci))
handle_error();
return ch;
}
static struct serial_device sh_serial_drv = {
.name = "sh_serial",
.start = sh_serial_init,
.stop = NULL,
.setbrg = sh_serial_setbrg,
.putc = sh_serial_putc,
.puts = default_serial_puts,
.getc = sh_serial_getc,
.tstc = sh_serial_tstc,
};
void sh_serial_initialize(void)
{
serial_register(&sh_serial_drv);
}
__weak struct serial_device *default_serial_console(void)
{
return &sh_serial_drv;
}
|
