1 |
30 |
unneback |
/*
|
2 |
|
|
* console.c
|
3 |
|
|
*
|
4 |
|
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* This file contains the MVME167 termios console package. Only asynchronous
|
5 |
|
|
* I/O is supported.
|
6 |
|
|
*
|
7 |
|
|
* /dev/tty0 is channel 0, Serial Port 1/Console on the MVME712M.
|
8 |
|
|
* /dev/tty1 is channel 1, Serial Port 2/TTY01 on the MVME712M.
|
9 |
|
|
* /dev/tty2 is channel 2, Serial Port 3 on the MVME712M.
|
10 |
|
|
* /dev/tty3 is channel 3, Serial Port 4 on the MVME712M.
|
11 |
|
|
*
|
12 |
|
|
* Normal I/O uses DMA for output, interrupts for input. /dev/console is
|
13 |
|
|
* fixed to be /dev/tty01, Serial Port 2. Very limited support is provided
|
14 |
|
|
* for polled I/O. Polled I/O is intended only for running the RTEMS test
|
15 |
|
|
* suites. In all cases, Serial Port 1/Console is allocated to 167Bug and
|
16 |
|
|
* is the dedicated debugger port. We configure GDB to use 167Bug for
|
17 |
|
|
* debugging. When debugging with GDB or 167Bug, do not open /dev/tty00.
|
18 |
|
|
*
|
19 |
|
|
* Modern I/O chips often contain a number of I/O devices that can operate
|
20 |
|
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* almost independently of each other. Typically, in RTEMS, all devices in
|
21 |
|
|
* an I/O chip are handled by a single device driver, but that need not be
|
22 |
|
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* always the case. Each device driver must supply six entry points in the
|
23 |
|
|
* Device Driver Table: a device initialization function, as well as an open,
|
24 |
|
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* close, read, write and a control function. RTEMS assigns a device major
|
25 |
|
|
* number to each device driver. This major device number is the index of the
|
26 |
|
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* device driver entries in the Device Driver Table, and it used to identify
|
27 |
|
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* a particular device driver. To distinguish multiple I/O sub-devices within
|
28 |
|
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* an I/O chip, RTEMS supports device minor numbers. When a I/O device is
|
29 |
|
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* initialized, the major number is supplied to the initialization function.
|
30 |
|
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* That function must register each sub-device with a separate name and minor
|
31 |
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* number (as well as the supplied major number). When an application opens a
|
32 |
|
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* device by name, the corresponding major and minor numbers are returned to
|
33 |
|
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* the caller to be used in subsequent I/O operations (although these details
|
34 |
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* are typically hidden within the library functions).
|
35 |
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*
|
36 |
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* Such a scheme recognizes that the initialization of the individual
|
37 |
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* sub-devices is generally not completely independent. For example, the
|
38 |
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* four serial ports of the CD2401 can be configured almost independently
|
39 |
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* from each other. One port could be configured to operate in asynchronous
|
40 |
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* mode with interrupt-driven I/O, while another port could be configured to
|
41 |
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* operate in HDLC mode with DMA I/O. However, a device reset command will
|
42 |
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* reset all four channels, and the width of DMA transfers and the number of
|
43 |
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* retries following bus errors selected applies to all four channels.
|
44 |
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* Consequently, when initializing one channel, one must be careful not to
|
45 |
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* destroy the configuration of other channels that are already configured.
|
46 |
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*
|
47 |
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* One problem with the RTEMS I/O initialization model is that no information
|
48 |
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* other than a device major number is passed to the initialization function.
|
49 |
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* Consequently, the sub-devices must be initialized with some pre-determined
|
50 |
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* configuration. To change the configuration of a sub-device, it is
|
51 |
|
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* necessary to either rewrite the initialization function, or to make a
|
52 |
|
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* series of rtems_io_control() calls after initialization. The first
|
53 |
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* approach is not very elegant. The second approach is acceptable if an
|
54 |
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* application is simply changing baud rates, parity or other such
|
55 |
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* asynchronous parameters (as supplied by the termios package). But what if
|
56 |
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* an application requires one channel to run in HDLC or Bisync mode and
|
57 |
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* another in async mode? With a single driver per I/O chip approach, the
|
58 |
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* device driver must support multiple protocols. This is feasible, but it
|
59 |
|
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* often means that an application that only does asynchronous I/O now links
|
60 |
|
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* in code for other unused protocols, thus wasting precious ROM space.
|
61 |
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* Worse, it requires that the sub-devices be initialized in some
|
62 |
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* configuration, and that configuration then changed through a series of
|
63 |
|
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* device driver control calls. There is no standard API in RTEMS to switch
|
64 |
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* a serial line to some synchronous protocol.
|
65 |
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*
|
66 |
|
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* A better approach is to treat each channel as a separate device, each with
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67 |
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* its own device device driver. The application then supplies its own device
|
68 |
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* driver table with only the required protocols (drivers) on each line. The
|
69 |
|
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* problem with this approach is that the device drivers are not really
|
70 |
|
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* independent, given that the I/O sub-devices within a common chip are not
|
71 |
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* independent themselves. Consequently, the related device drivers must
|
72 |
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* share some information. In RTEMS, there is no standard location in which
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73 |
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* to share information.
|
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*
|
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* This driver handles all four channels, i.e. it distinguishes the
|
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* sub-devices using minor device numbers. Only asynchronous I/O is
|
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* supported. The console is currently fixed to be channel 1 on the CD2401,
|
78 |
|
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* which corresponds to the TTY01 port (Serial Port 2) on the MVME712M
|
79 |
|
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* Transition Module.
|
80 |
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*
|
81 |
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* The CD2401 does either interrupt-driven or DMA I/O; it does not support
|
82 |
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* polling. In interrupt-driven or DMA I/O modes, interrupts from the CD2401
|
83 |
|
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* are routed to the MC68040, and the processor generates an interrupt
|
84 |
|
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* acknowledge cycle directly to the CD2401 to obtain an interrupt vector.
|
85 |
|
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* The PCCchip2 supports a pseudo-polling mode in which interrupts from the
|
86 |
|
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* CD2401 are not routed to the MC68040, but can be detected by the processor
|
87 |
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* by reading the appropriate CD2401 registers. In this mode, interrupt
|
88 |
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* acknowledge cycles must be generated to the CD2401 by reading the
|
89 |
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* appropriate PCCchip2 registers.
|
90 |
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*
|
91 |
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* Interrupts from the four channels cannot be routed independently; either
|
92 |
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* all channels are used in the pseudo-polling mode, or all channels are used
|
93 |
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* in interrupt-driven/DMA mode. There is no advantage in using the speudo-
|
94 |
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* polling mode. Consenquently, this driver performs DMA input and output.
|
95 |
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* Output is performed directly from the termios raw output buffer, while
|
96 |
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* input is accumulated into a separate buffer.
|
97 |
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*
|
98 |
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* THIS MODULE IS NOT RE-ENTRANT! Simultaneous access to a device from
|
99 |
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* multiple tasks is likely to cause significant problems! Concurrency
|
100 |
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* control is implemented in the termios package.
|
101 |
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*
|
102 |
|
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* THE INTERRUPT LEVEL IS SET TO 1 FOR ALL CHANNELS.
|
103 |
|
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* If the CD2401 is to be used for high speed synchronous serial I/O, the
|
104 |
|
|
* interrupt priority might need to be increased.
|
105 |
|
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*
|
106 |
|
|
* ALL INTERRUPT HANDLERS ARE SHARED.
|
107 |
|
|
* When adding extra device drivers, either rewrite the interrupt handlers
|
108 |
|
|
* to demultiplex the interrupts, or install separate vectors. Common vectors
|
109 |
|
|
* are currently used to catch spurious interrupts. We could already have
|
110 |
|
|
* installed separate vectors for each channel and used the spurious
|
111 |
|
|
* interrupt handler defined in some other BSPs, but handling spurious
|
112 |
|
|
* interrupts from the CD2401 in this device driver allows us to record more
|
113 |
|
|
* information on the source of the interrupts. Furthermore, we have observed
|
114 |
|
|
* the occasional spurious interrupt from channel 0. We definitely do not
|
115 |
|
|
* to call a debugger for those.
|
116 |
|
|
*
|
117 |
|
|
* All page references are to the MVME166/MVME167/MVME187 Single Board
|
118 |
|
|
* Computer Programmer's Reference Guide (MVME187PG/D2) with the April
|
119 |
|
|
* 1993 supplements/addenda (MVME187PG/D2A1).
|
120 |
|
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*
|
121 |
|
|
* Copyright (c) 1998, National Research Council of Canada
|
122 |
|
|
*
|
123 |
|
|
* The license and distribution terms for this file may be
|
124 |
|
|
* found in the file LICENSE in this distribution or at
|
125 |
|
|
* http://www.OARcorp.com/rtems/license.html.
|
126 |
|
|
*/
|
127 |
|
|
|
128 |
|
|
#define M167_INIT
|
129 |
|
|
|
130 |
|
|
#include <stdarg.h>
|
131 |
|
|
#include <stdio.h>
|
132 |
|
|
#include <termios.h>
|
133 |
|
|
#include <bsp.h> /* Must be before libio.h */
|
134 |
|
|
#include <rtems/libio.h>
|
135 |
|
|
|
136 |
|
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|
137 |
|
|
/* Channel info */
|
138 |
|
|
/* static */ volatile struct {
|
139 |
|
|
void *tty; /* Really a struct rtems_termios_tty * */
|
140 |
|
|
int len; /* Record nb of chars being TX'ed */
|
141 |
|
|
const char *buf; /* Record where DMA is coming from */
|
142 |
|
|
rtems_unsigned32 spur_cnt; /* Nb of spurious ints so far */
|
143 |
|
|
rtems_unsigned32 spur_dev; /* Indo on last spurious int */
|
144 |
|
|
rtems_unsigned32 buserr_addr; /* Faulting address */
|
145 |
|
|
rtems_unsigned32 buserr_type; /* Reason of bus error during DMA */
|
146 |
|
|
rtems_unsigned8 own_buf_A; /* If true, buffer A belongs to the driver */
|
147 |
|
|
rtems_unsigned8 own_buf_B; /* If true, buffer B belongs to the driver */
|
148 |
|
|
rtems_unsigned8 txEmpty; /* If true, the output FIFO is supposed to be empty */
|
149 |
|
|
} CD2401_Channel_Info[4];
|
150 |
|
|
|
151 |
|
|
/*
|
152 |
|
|
* The number of channels already opened. If zero, enable the interrupts. The
|
153 |
|
|
* initial value must be 0. If initialized explicitly, the variable ends up
|
154 |
|
|
* in the .data section. Its value is not re-initialized on system restart.
|
155 |
|
|
* Furthermore, because the variable is changed, the .data section would not
|
156 |
|
|
* be ROMable. We thus leave the variable uninitialized, which causes it to
|
157 |
|
|
* be allocated in the .bss section, and rely on RTEMS to zero the .bss
|
158 |
|
|
* section on every startup.
|
159 |
|
|
*/
|
160 |
|
|
rtems_unsigned8 Init_count;
|
161 |
|
|
|
162 |
|
|
|
163 |
|
|
/* Record previous handlers */
|
164 |
|
|
rtems_isr_entry Prev_re_isr; /* Previous rx exception isr */
|
165 |
|
|
rtems_isr_entry Prev_rx_isr; /* Previous rx isr */
|
166 |
|
|
rtems_isr_entry Prev_tx_isr; /* Previous tx isr */
|
167 |
|
|
rtems_isr_entry Prev_modem_isr; /* Previous modem/timer isr */
|
168 |
|
|
|
169 |
|
|
|
170 |
|
|
/* Define the following symbol to trace the calls to this driver */
|
171 |
|
|
/* #define CD2401_RECORD_DEBUG_INFO */
|
172 |
|
|
#include "console-recording.c"
|
173 |
|
|
|
174 |
|
|
|
175 |
|
|
/* Utility functions */
|
176 |
|
|
void cd2401_udelay( unsigned long delay );
|
177 |
|
|
void cd2401_chan_cmd( rtems_unsigned8 channel, rtems_unsigned8 cmd, rtems_unsigned8 wait );
|
178 |
|
|
rtems_unsigned16 cd2401_bitrate_divisor( rtems_unsigned32 clkrate, rtems_unsigned32* bitrate );
|
179 |
|
|
void cd2401_initialize( void );
|
180 |
|
|
void cd2401_interrupts_initialize( rtems_boolean enable );
|
181 |
|
|
|
182 |
|
|
/* ISRs */
|
183 |
|
|
rtems_isr cd2401_modem_isr( rtems_vector_number vector );
|
184 |
|
|
rtems_isr cd2401_re_isr( rtems_vector_number vector );
|
185 |
|
|
rtems_isr cd2401_rx_isr( rtems_vector_number vector );
|
186 |
|
|
rtems_isr cd2401_tx_isr( rtems_vector_number vector );
|
187 |
|
|
|
188 |
|
|
/* Termios callbacks */
|
189 |
|
|
int cd2401_firstOpen( int major, int minor, void *arg );
|
190 |
|
|
int cd2401_lastClose( int major, int minor, void *arg );
|
191 |
|
|
int cd2401_setAttributes( int minor, const struct termios *t );
|
192 |
|
|
int cd2401_startRemoteTx( int minor );
|
193 |
|
|
int cd2401_stopRemoteTx( int minor );
|
194 |
|
|
int cd2401_write( int minor, const char *buf, int len );
|
195 |
|
|
int cd2401_drainOutput( int minor );
|
196 |
|
|
int _167Bug_pollRead( int minor );
|
197 |
|
|
int _167Bug_pollWrite( int minor, const char *buf, int len );
|
198 |
|
|
|
199 |
|
|
|
200 |
|
|
/*
|
201 |
|
|
* Utility functions.
|
202 |
|
|
*/
|
203 |
|
|
|
204 |
|
|
/*
|
205 |
|
|
* Assumes that clock ticks 1 million times per second.
|
206 |
|
|
*
|
207 |
|
|
* MAXIMUM DELAY IS ABOUT 20 ms
|
208 |
|
|
*
|
209 |
|
|
* Input parameters:
|
210 |
|
|
* delay: Number of microseconds to delay.
|
211 |
|
|
*
|
212 |
|
|
* Output parameters: NONE
|
213 |
|
|
*
|
214 |
|
|
* Return values: NONE
|
215 |
|
|
*/
|
216 |
|
|
void cd2401_udelay
|
217 |
|
|
(
|
218 |
|
|
unsigned long delay
|
219 |
|
|
)
|
220 |
|
|
{
|
221 |
|
|
unsigned long i = 20000; /* In case clock is off */
|
222 |
|
|
rtems_interval ticks_per_second, start_ticks, end_ticks, current_ticks;
|
223 |
|
|
|
224 |
|
|
rtems_clock_get( RTEMS_CLOCK_GET_TICKS_PER_SECOND, &ticks_per_second );
|
225 |
|
|
rtems_clock_get( RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &start_ticks );
|
226 |
|
|
end_ticks = start_ticks + delay;
|
227 |
|
|
|
228 |
|
|
do {
|
229 |
|
|
rtems_clock_get(RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, ¤t_ticks);
|
230 |
|
|
} while ( --i && (current_ticks <= end_ticks) );
|
231 |
|
|
|
232 |
|
|
CD2401_RECORD_DELAY_INFO(( start_ticks, end_ticks, current_ticks, i ));
|
233 |
|
|
}
|
234 |
|
|
|
235 |
|
|
|
236 |
|
|
/*
|
237 |
|
|
* cd2401_chan_cmd
|
238 |
|
|
*
|
239 |
|
|
* Sends a CCR command to the specified channel. Waits for any unfinished
|
240 |
|
|
* previous command to complete, then sends the specified command. Optionally
|
241 |
|
|
* wait for the current command to finish before returning.
|
242 |
|
|
*
|
243 |
|
|
* Input parameters:
|
244 |
|
|
* channel - CD2401 channel number
|
245 |
|
|
* cmd - command byte
|
246 |
|
|
* wait - if non-zero, wait for specified command to complete before
|
247 |
|
|
* returning.
|
248 |
|
|
*
|
249 |
|
|
* Output parameters: NONE
|
250 |
|
|
*
|
251 |
|
|
* Return values: NONE
|
252 |
|
|
*/
|
253 |
|
|
void cd2401_chan_cmd(
|
254 |
|
|
rtems_unsigned8 channel,
|
255 |
|
|
rtems_unsigned8 cmd,
|
256 |
|
|
rtems_unsigned8 wait
|
257 |
|
|
)
|
258 |
|
|
{
|
259 |
|
|
if ( channel < 4 ) {
|
260 |
|
|
cd2401->car = channel; /* Select channel */
|
261 |
|
|
|
262 |
|
|
while ( cd2401->ccr != 0 ); /* Wait for completion of any previous command */
|
263 |
|
|
cd2401->ccr = cmd; /* Send command */
|
264 |
|
|
if ( wait )
|
265 |
|
|
while( cd2401->ccr != 0 );/* Wait for completion */
|
266 |
|
|
}
|
267 |
|
|
else {
|
268 |
|
|
/* This may not be the best error message */
|
269 |
|
|
rtems_fatal_error_occurred( RTEMS_INVALID_NUMBER );
|
270 |
|
|
}
|
271 |
|
|
}
|
272 |
|
|
|
273 |
|
|
|
274 |
|
|
/*
|
275 |
|
|
* cd2401_bitrate_divisor
|
276 |
|
|
*
|
277 |
|
|
* Compute the divisor and clock source to use to obtain the desired bitrate.
|
278 |
|
|
*
|
279 |
|
|
* Input parameters:
|
280 |
|
|
* clkrate - system clock rate (CLK input frequency)
|
281 |
|
|
* bitrate - the desired bitrate
|
282 |
|
|
*
|
283 |
|
|
* Output parameters:
|
284 |
|
|
* bitrate - The actual bitrate achievable, to the nearest bps.
|
285 |
|
|
*
|
286 |
|
|
* Return values:
|
287 |
|
|
* Returns divisor in lower byte and clock source in upper byte for the
|
288 |
|
|
* specified bitrate.
|
289 |
|
|
*/
|
290 |
|
|
rtems_unsigned16 cd2401_bitrate_divisor(
|
291 |
|
|
rtems_unsigned32 clkrate,
|
292 |
|
|
rtems_unsigned32* bitrate
|
293 |
|
|
)
|
294 |
|
|
{
|
295 |
|
|
rtems_unsigned32 divisor;
|
296 |
|
|
rtems_unsigned16 clksource;
|
297 |
|
|
|
298 |
|
|
divisor = *bitrate << 3; /* temporary; multiply by 8 for CLK/8 */
|
299 |
|
|
divisor = (clkrate + (divisor>>1)) / divisor; /* divisor for clk0 (CLK/8) */
|
300 |
|
|
|
301 |
|
|
/* Use highest speed clock source for best precision - try from clk0 to clk4: */
|
302 |
|
|
for( clksource = 0; clksource < 0x0400 && divisor > 0x100; clksource += 0x0100 )
|
303 |
|
|
divisor >>= 2;
|
304 |
|
|
divisor--; /* adjustment, see specs */
|
305 |
|
|
if( divisor < 1 )
|
306 |
|
|
divisor = 1;
|
307 |
|
|
else if( divisor > 0xFF )
|
308 |
|
|
divisor = 0xFF;
|
309 |
|
|
*bitrate = clkrate / (1 << ((clksource >> 7)+3)) / (divisor+1);
|
310 |
|
|
return( clksource | divisor );
|
311 |
|
|
}
|
312 |
|
|
|
313 |
|
|
|
314 |
|
|
/*
|
315 |
|
|
* cd2401_initialize
|
316 |
|
|
*
|
317 |
|
|
* Initializes the CD2401 device. Individual channels on the chip are left in
|
318 |
|
|
* their default reset state, and should be subsequently configured.
|
319 |
|
|
*
|
320 |
|
|
* Input parameters: NONE
|
321 |
|
|
*
|
322 |
|
|
* Output parameters: NONE
|
323 |
|
|
*
|
324 |
|
|
* Return values: NONE
|
325 |
|
|
*/
|
326 |
|
|
void cd2401_initialize( void )
|
327 |
|
|
{
|
328 |
|
|
int i;
|
329 |
|
|
|
330 |
|
|
for ( i = 3; i >= 0; i-- ) {
|
331 |
|
|
CD2401_Channel_Info[i].tty = NULL;
|
332 |
|
|
CD2401_Channel_Info[i].len = 0;
|
333 |
|
|
CD2401_Channel_Info[i].buf = NULL;
|
334 |
|
|
CD2401_Channel_Info[i].spur_cnt = 0;
|
335 |
|
|
CD2401_Channel_Info[i].spur_dev = 0;
|
336 |
|
|
CD2401_Channel_Info[i].buserr_type = 0;
|
337 |
|
|
CD2401_Channel_Info[i].buserr_addr = 0;
|
338 |
|
|
CD2401_Channel_Info[i].own_buf_A = TRUE;
|
339 |
|
|
CD2401_Channel_Info[i].own_buf_B = TRUE;
|
340 |
|
|
CD2401_Channel_Info[i].txEmpty = TRUE;
|
341 |
|
|
}
|
342 |
|
|
|
343 |
|
|
/*
|
344 |
|
|
* Normally, do a device reset here. If we do it, we will most likely clober
|
345 |
|
|
* the port settings for 167Bug on channel 0. So we just shut up all the
|
346 |
|
|
* ports by disabling their interrupts.
|
347 |
|
|
*/
|
348 |
|
|
#if 0
|
349 |
|
|
cd2401->gfrcr = 0; /* So we can detect that device init is done */
|
350 |
|
|
cd2401_chan_cmd( 0x10, 0); /* Reset all */
|
351 |
|
|
while(cd2401->gfrcr == 0); /* Wait for reset all */
|
352 |
|
|
#endif
|
353 |
|
|
|
354 |
|
|
/*
|
355 |
|
|
* The CL-CD2400/2401 manual (part no 542400-003) states on page 87 that
|
356 |
|
|
* the LICR "contains the number of the interrupting channel being served.
|
357 |
|
|
* The channel number is always that of the current acknowledged interrupt."
|
358 |
|
|
* THE USER MUST PROGRAM CHANNEL NUMBER IN LICR! It is not set automatically
|
359 |
|
|
* by the hardware, as suggested by the manual.
|
360 |
|
|
*
|
361 |
|
|
* The updated manual (part no 542400-007) has the story strait. The CD2401
|
362 |
|
|
* automatically initializes the LICR to contain the channel number in bits
|
363 |
|
|
* 2 and 3. However, these bits are not preserved when the user defined bits
|
364 |
|
|
* are written.
|
365 |
|
|
*
|
366 |
|
|
* The same vector number is used for all four channels. Different vector
|
367 |
|
|
* numbers could be programmed for each channel, thus avoiding the need to
|
368 |
|
|
* demultiplex the interrupts in the ISR.
|
369 |
|
|
*/
|
370 |
|
|
for ( i = 0; i < 4; i++ ) {
|
371 |
|
|
cd2401->car = i; /* Select channel */
|
372 |
|
|
cd2401->livr = 0x5C; /* Motorola suggested value p. 3-15 */
|
373 |
|
|
cd2401->licr = i << 2; /* Don't rely on reset value */
|
374 |
|
|
cd2401->ier = 0; /* Disable all interrupts */
|
375 |
|
|
}
|
376 |
|
|
|
377 |
|
|
/*
|
378 |
|
|
* The content of the CD2401 xpilr registers must match the A7-A0 addresses
|
379 |
|
|
* generated by the PCCchip2 during interrupt acknowledge cycles in order
|
380 |
|
|
* for the CD2401 to recognize the IACK cycle and clear its interrupt
|
381 |
|
|
* request.
|
382 |
|
|
*/
|
383 |
|
|
cd2401->mpilr = 0x01; /* Match pccchip2->modem_piack p. 3-27 */
|
384 |
|
|
cd2401->tpilr = 0x02; /* Match pccchip2->tx_piack p. 3-28 */
|
385 |
|
|
cd2401->rpilr = 0x03; /* Match pccchip2->rx_piack p. 3-29 */
|
386 |
|
|
|
387 |
|
|
/* Global CD2401 registers */
|
388 |
|
|
cd2401->dmr = 0; /* 16-bit DMA transfers when possible */
|
389 |
|
|
cd2401->bercnt = 0; /* Do not retry DMA upon bus errors */
|
390 |
|
|
|
391 |
|
|
/*
|
392 |
|
|
* Setup timer prescaler period, which clocks timers 1 and 2 (or rx timeout
|
393 |
|
|
* and tx delay). The prescaler is clocked by the system clock) / 2048. The
|
394 |
|
|
* register must be in the range 0x0A..0xFF, ie. a rescaler period range of
|
395 |
|
|
* about 1ms..26ms for a nominal system clock rate of 20MHz.
|
396 |
|
|
*/
|
397 |
|
|
cd2401->tpr = 0x0A; /* Same value as 167Bug */
|
398 |
|
|
}
|
399 |
|
|
|
400 |
|
|
|
401 |
|
|
/*
|
402 |
|
|
* cd2401_interrupts_initialize
|
403 |
|
|
*
|
404 |
|
|
* This routine enables or disables the CD2401 interrupts to the MC68040.
|
405 |
|
|
* Interrupts cannot be enabled/disabled on a per-channel basis.
|
406 |
|
|
*
|
407 |
|
|
* Input parameters:
|
408 |
|
|
* enable - if true, enable the interrupts, else disable them.
|
409 |
|
|
*
|
410 |
|
|
* Output parameters: NONE
|
411 |
|
|
*
|
412 |
|
|
* Return values: NONE
|
413 |
|
|
*
|
414 |
|
|
* THE FIRST CD2401 CHANNEL OPENED SHOULD ENABLE INTERRUPTS.
|
415 |
|
|
* THE LAST CD2401 CHANNEL CLOSED SHOULD DISABLE INTERRUPTS.
|
416 |
|
|
*/
|
417 |
|
|
void cd2401_interrupts_initialize(
|
418 |
|
|
rtems_boolean enable
|
419 |
|
|
)
|
420 |
|
|
{
|
421 |
|
|
if ( enable ) {
|
422 |
|
|
/*
|
423 |
|
|
* Enable interrupts from the CD2401 in the PCCchip2.
|
424 |
|
|
* During DMA transfers, the MC68040 supplies dirty data during read cycles
|
425 |
|
|
* from the CD2401 and leaves the data dirty in its data cache if there is
|
426 |
|
|
* a cache hit. The MC68040 updates the data cache during write cycles from
|
427 |
|
|
* the CD2401 if there is a cache hit.
|
428 |
|
|
*/
|
429 |
|
|
pccchip2->SCC_error = 0x01;
|
430 |
|
|
pccchip2->SCC_modem_int_ctl = 0x10 | CD2401_INT_LEVEL;
|
431 |
|
|
pccchip2->SCC_tx_int_ctl = 0x10 | CD2401_INT_LEVEL;
|
432 |
|
|
pccchip2->SCC_rx_int_ctl = 0x50 | CD2401_INT_LEVEL;
|
433 |
|
|
|
434 |
|
|
pccchip2->gen_control |= 0x02; /* Enable pccchip2 interrupts */
|
435 |
|
|
}
|
436 |
|
|
else {
|
437 |
|
|
/* Disable interrupts */
|
438 |
|
|
pccchip2->SCC_modem_int_ctl &= 0xEF;
|
439 |
|
|
pccchip2->SCC_tx_int_ctl &= 0xEF;
|
440 |
|
|
pccchip2->SCC_rx_int_ctl &= 0xEF;
|
441 |
|
|
}
|
442 |
|
|
}
|
443 |
|
|
|
444 |
|
|
|
445 |
|
|
/* ISRs */
|
446 |
|
|
|
447 |
|
|
/*
|
448 |
|
|
* cd2401_modem_isr
|
449 |
|
|
*
|
450 |
|
|
* Modem/timer interrupt (group 1) from CD2401. These are not used, and not
|
451 |
|
|
* expected. Record as spurious and clear.
|
452 |
|
|
*
|
453 |
|
|
* Input parameters:
|
454 |
|
|
* vector - vector number
|
455 |
|
|
*
|
456 |
|
|
* Output parameters: NONE
|
457 |
|
|
*
|
458 |
|
|
* Return values: NONE
|
459 |
|
|
*/
|
460 |
|
|
rtems_isr cd2401_modem_isr(
|
461 |
|
|
rtems_vector_number vector
|
462 |
|
|
)
|
463 |
|
|
{
|
464 |
|
|
rtems_unsigned8 ch;
|
465 |
|
|
|
466 |
|
|
/* Get interrupting channel ID */
|
467 |
|
|
ch = cd2401->licr >> 2;
|
468 |
|
|
|
469 |
|
|
/* Record interrupt info for debugging */
|
470 |
|
|
CD2401_Channel_Info[ch].spur_dev =
|
471 |
|
|
(vector << 24) | (cd2401->stk << 16) | (cd2401->mir << 8) | cd2401->misr;
|
472 |
|
|
CD2401_Channel_Info[ch].spur_cnt++;
|
473 |
|
|
|
474 |
|
|
cd2401->meoir = 0; /* EOI */
|
475 |
|
|
CD2401_RECORD_MODEM_ISR_SPURIOUS_INFO(( ch,
|
476 |
|
|
CD2401_Channel_Info[ch].spur_dev,
|
477 |
|
|
CD2401_Channel_Info[ch].spur_cnt ));
|
478 |
|
|
}
|
479 |
|
|
|
480 |
|
|
|
481 |
|
|
/*
|
482 |
|
|
* cd2401_re_isr
|
483 |
|
|
*
|
484 |
|
|
* RX exception interrupt (group 3, receiver exception) from CD2401. These are
|
485 |
|
|
* not used, and not expected. Record as spurious and clear.
|
486 |
|
|
*
|
487 |
|
|
* FIX THIS ISR TO DETECT BREAK CONDITIONS AND RAISE SIGINT
|
488 |
|
|
*
|
489 |
|
|
* Input parameters:
|
490 |
|
|
* vector - vector number
|
491 |
|
|
*
|
492 |
|
|
* Output parameters: NONE
|
493 |
|
|
*
|
494 |
|
|
* Return values: NONE
|
495 |
|
|
*/
|
496 |
|
|
rtems_isr cd2401_re_isr(
|
497 |
|
|
rtems_vector_number vector
|
498 |
|
|
)
|
499 |
|
|
{
|
500 |
|
|
rtems_unsigned8 ch;
|
501 |
|
|
|
502 |
|
|
/* Get interrupting channel ID */
|
503 |
|
|
ch = cd2401->licr >> 2;
|
504 |
|
|
|
505 |
|
|
/* Record interrupt info for debugging */
|
506 |
|
|
CD2401_Channel_Info[ch].spur_dev =
|
507 |
|
|
(vector << 24) | (cd2401->stk << 16) | (cd2401->rir << 8) | cd2401->u5.b.risrl;
|
508 |
|
|
CD2401_Channel_Info[ch].spur_cnt++;
|
509 |
|
|
|
510 |
|
|
if ( cd2401->u5.b.risrl & 0x80 ) /* Timeout interrupt? */
|
511 |
|
|
cd2401->ier &= 0xDF; /* Disable rx timeout interrupt */
|
512 |
|
|
cd2401->reoir = 0x08; /* EOI; exception char not read */
|
513 |
|
|
CD2401_RECORD_RE_ISR_SPURIOUS_INFO(( ch,
|
514 |
|
|
CD2401_Channel_Info[ch].spur_dev,
|
515 |
|
|
CD2401_Channel_Info[ch].spur_cnt ));
|
516 |
|
|
}
|
517 |
|
|
|
518 |
|
|
|
519 |
|
|
/*
|
520 |
|
|
* cd2401_rx_isr
|
521 |
|
|
*
|
522 |
|
|
* RX interrupt (group 3, receiver data) from CD2401.
|
523 |
|
|
*
|
524 |
|
|
* Input parameters:
|
525 |
|
|
* vector - vector number
|
526 |
|
|
*
|
527 |
|
|
* Output parameters: NONE
|
528 |
|
|
*
|
529 |
|
|
* Return values: NONE
|
530 |
|
|
*/
|
531 |
|
|
rtems_isr cd2401_rx_isr(
|
532 |
|
|
rtems_vector_number vector
|
533 |
|
|
)
|
534 |
|
|
{
|
535 |
|
|
char c;
|
536 |
|
|
rtems_unsigned8 ch, status, nchars, i, total;
|
537 |
|
|
char buffer[256];
|
538 |
|
|
|
539 |
|
|
status = cd2401->u5.b.risrl;
|
540 |
|
|
ch = cd2401->licr >> 2;
|
541 |
|
|
|
542 |
|
|
/* Has this channel been initialized or is it a condition we ignore? */
|
543 |
|
|
if ( CD2401_Channel_Info[ch].tty && !status ) {
|
544 |
|
|
/* Normal Rx Int, read chars, enqueue them, and issue EOI */
|
545 |
|
|
total = nchars = cd2401->rfoc; /* Nb of chars to retrieve from rx FIFO */
|
546 |
|
|
i = 0;
|
547 |
|
|
while ( nchars-- > 0 ) {
|
548 |
|
|
c = (char)cd2401->dr; /* Next char in rx FIFO */
|
549 |
|
|
rtems_termios_enqueue_raw_characters( CD2401_Channel_Info[ch].tty ,&c, 1 );
|
550 |
|
|
buffer[i++] = c;
|
551 |
|
|
}
|
552 |
|
|
cd2401->reoir = 0; /* EOI */
|
553 |
|
|
CD2401_RECORD_RX_ISR_INFO(( ch, total, buffer ));
|
554 |
|
|
} else {
|
555 |
|
|
/* No, record as spurious interrupt */
|
556 |
|
|
CD2401_Channel_Info[ch].spur_dev =
|
557 |
|
|
(vector << 24) | (cd2401->stk << 16) | (cd2401->rir << 8) | cd2401->u5.b.risrl;
|
558 |
|
|
CD2401_Channel_Info[ch].spur_cnt++;
|
559 |
|
|
cd2401->reoir = 0x04; /* EOI - character not read */
|
560 |
|
|
CD2401_RECORD_RX_ISR_SPURIOUS_INFO(( ch, status,
|
561 |
|
|
CD2401_Channel_Info[ch].spur_dev,
|
562 |
|
|
CD2401_Channel_Info[ch].spur_cnt ));
|
563 |
|
|
}
|
564 |
|
|
}
|
565 |
|
|
|
566 |
|
|
|
567 |
|
|
/*
|
568 |
|
|
* cd2401_tx_isr
|
569 |
|
|
*
|
570 |
|
|
* TX interrupt (group 2) from CD2401.
|
571 |
|
|
*
|
572 |
|
|
* Input parameters:
|
573 |
|
|
* vector - vector number
|
574 |
|
|
*
|
575 |
|
|
* Output parameters: NONE
|
576 |
|
|
*
|
577 |
|
|
* Return values: NONE
|
578 |
|
|
*/
|
579 |
|
|
rtems_isr cd2401_tx_isr(
|
580 |
|
|
rtems_vector_number vector
|
581 |
|
|
)
|
582 |
|
|
{
|
583 |
|
|
rtems_unsigned8 ch, status, buserr, initial_ier, final_ier;
|
584 |
|
|
|
585 |
|
|
status = cd2401->tisr;
|
586 |
|
|
ch = cd2401->licr >> 2;
|
587 |
|
|
initial_ier = cd2401->ier;
|
588 |
|
|
|
589 |
|
|
/* Has this channel been initialized? */
|
590 |
|
|
if ( !CD2401_Channel_Info[ch].tty ) {
|
591 |
|
|
/* No, record as spurious interrupt */
|
592 |
|
|
CD2401_Channel_Info[ch].spur_dev =
|
593 |
|
|
(vector << 24) | (cd2401->stk << 16) | (cd2401->tir << 8) | cd2401->tisr;
|
594 |
|
|
CD2401_Channel_Info[ch].spur_cnt++;
|
595 |
|
|
final_ier = cd2401->ier &= 0xFC;/* Shut up, whoever you are */
|
596 |
|
|
cd2401->teoir = 0x88; /* EOI - Terminate buffer and no transfer */
|
597 |
|
|
CD2401_RECORD_TX_ISR_SPURIOUS_INFO(( ch, status, initial_ier, final_ier,
|
598 |
|
|
CD2401_Channel_Info[ch].spur_dev,
|
599 |
|
|
CD2401_Channel_Info[ch].spur_cnt ));
|
600 |
|
|
return;
|
601 |
|
|
}
|
602 |
|
|
|
603 |
|
|
if ( status & 0x80 ) {
|
604 |
|
|
/*
|
605 |
|
|
* Bus error occurred during DMA transfer. For now, just record.
|
606 |
|
|
* Get reason for DMA bus error and clear the report for the next occurrence
|
607 |
|
|
*/
|
608 |
|
|
buserr = pccchip2->SCC_error;
|
609 |
|
|
pccchip2->SCC_error = 0x01;
|
610 |
|
|
CD2401_Channel_Info[ch].buserr_type =
|
611 |
|
|
(vector << 24) | (buserr << 16) | (cd2401->tir << 8) | cd2401->tisr;
|
612 |
|
|
CD2401_Channel_Info[ch].buserr_addr =
|
613 |
|
|
(((rtems_unsigned32)cd2401->tcbadru) << 16) | cd2401->tcbadrl;
|
614 |
|
|
|
615 |
|
|
cd2401->teoir = 0x80; /* EOI - terminate bad buffer */
|
616 |
|
|
CD2401_RECORD_TX_ISR_BUSERR_INFO(( ch, status, initial_ier, buserr,
|
617 |
|
|
CD2401_Channel_Info[ch].buserr_type,
|
618 |
|
|
CD2401_Channel_Info[ch].buserr_addr ));
|
619 |
|
|
return;
|
620 |
|
|
}
|
621 |
|
|
|
622 |
|
|
if ( status & 0x20 ) {
|
623 |
|
|
/* DMA done -- Turn off TxD int, turn on TxMpty */
|
624 |
|
|
final_ier = cd2401->ier = (cd2401->ier & 0xFE) | 0x02;
|
625 |
|
|
if( status & 0x08 ) {
|
626 |
|
|
/* Transmit buffer B was released */
|
627 |
|
|
CD2401_Channel_Info[ch].own_buf_B = TRUE;
|
628 |
|
|
}
|
629 |
|
|
else {
|
630 |
|
|
/* Transmit buffer A was released */
|
631 |
|
|
CD2401_Channel_Info[ch].own_buf_A = TRUE;
|
632 |
|
|
}
|
633 |
|
|
CD2401_RECORD_TX_ISR_INFO(( ch, status, initial_ier, final_ier,
|
634 |
|
|
CD2401_Channel_Info[ch].txEmpty ));
|
635 |
|
|
|
636 |
|
|
/* This call can result in a call to cd2401_write() */
|
637 |
|
|
rtems_termios_dequeue_characters (
|
638 |
|
|
CD2401_Channel_Info[ch].tty,
|
639 |
|
|
CD2401_Channel_Info[ch].len );
|
640 |
|
|
cd2401->teoir = 0x08; /* EOI - no data transfered */
|
641 |
|
|
}
|
642 |
|
|
else if ( status & 0x02 ) {
|
643 |
|
|
/* TxEmpty */
|
644 |
|
|
CD2401_Channel_Info[ch].txEmpty = TRUE;
|
645 |
|
|
final_ier = cd2401->ier &= 0xFD;/* Shut up the interrupts */
|
646 |
|
|
cd2401->teoir = 0x08; /* EOI - no data transfered */
|
647 |
|
|
CD2401_RECORD_TX_ISR_INFO(( ch, status, initial_ier, final_ier,
|
648 |
|
|
CD2401_Channel_Info[ch].txEmpty ));
|
649 |
|
|
}
|
650 |
|
|
else {
|
651 |
|
|
/* Why did we get a Tx interrupt? */
|
652 |
|
|
CD2401_Channel_Info[ch].spur_dev =
|
653 |
|
|
(vector << 24) | (cd2401->stk << 16) | (cd2401->tir << 8) | cd2401->tisr;
|
654 |
|
|
CD2401_Channel_Info[ch].spur_cnt++;
|
655 |
|
|
cd2401->teoir = 0x08; /* EOI - no data transfered */
|
656 |
|
|
CD2401_RECORD_TX_ISR_SPURIOUS_INFO(( ch, status, initial_ier, 0xFF,
|
657 |
|
|
CD2401_Channel_Info[ch].spur_dev,
|
658 |
|
|
CD2401_Channel_Info[ch].spur_cnt ));
|
659 |
|
|
}
|
660 |
|
|
}
|
661 |
|
|
|
662 |
|
|
|
663 |
|
|
/*
|
664 |
|
|
* termios callbacks
|
665 |
|
|
*/
|
666 |
|
|
|
667 |
|
|
/*
|
668 |
|
|
* cd2401_firstOpen
|
669 |
|
|
*
|
670 |
|
|
* This is the first time that this minor device (channel) is opened.
|
671 |
|
|
* Complete the asynchronous initialization.
|
672 |
|
|
*
|
673 |
|
|
* Input parameters:
|
674 |
|
|
* major - device major number
|
675 |
|
|
* minor - channel number
|
676 |
|
|
* arg - pointer to a struct rtems_libio_open_close_args_t
|
677 |
|
|
*
|
678 |
|
|
* Output parameters: NONE
|
679 |
|
|
*
|
680 |
|
|
* Return value: IGNORED
|
681 |
|
|
*/
|
682 |
|
|
int cd2401_firstOpen(
|
683 |
|
|
int major,
|
684 |
|
|
int minor,
|
685 |
|
|
void *arg
|
686 |
|
|
)
|
687 |
|
|
{
|
688 |
|
|
rtems_libio_open_close_args_t *args = arg;
|
689 |
|
|
rtems_libio_ioctl_args_t newarg;
|
690 |
|
|
struct termios termios;
|
691 |
|
|
rtems_status_code sc;
|
692 |
|
|
rtems_interrupt_level level;
|
693 |
|
|
|
694 |
|
|
rtems_interrupt_disable (level);
|
695 |
|
|
|
696 |
|
|
/*
|
697 |
|
|
* Set up the line with the specified parameters. The difficulty is that
|
698 |
|
|
* the line parameters are stored in the struct termios field of a
|
699 |
|
|
* struct rtems_termios_tty that is not defined in a public header file.
|
700 |
|
|
* Therefore, we do not have direct access to the termios passed in with
|
701 |
|
|
* arg. So we make a rtems_termios_ioctl() call to get a pointer to the
|
702 |
|
|
* termios structure.
|
703 |
|
|
*
|
704 |
|
|
* THIS KLUDGE MAY BREAK IN THE FUTURE!
|
705 |
|
|
*
|
706 |
|
|
* We could have made a tcgetattr() call if we had our fd.
|
707 |
|
|
*/
|
708 |
|
|
newarg.iop = args->iop;
|
709 |
|
|
newarg.command = RTEMS_IO_GET_ATTRIBUTES;
|
710 |
|
|
newarg.buffer = &termios;
|
711 |
|
|
sc = rtems_termios_ioctl (&newarg);
|
712 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
713 |
|
|
rtems_fatal_error_occurred (sc);
|
714 |
|
|
|
715 |
|
|
/*
|
716 |
|
|
* Turn off hardware flow control. It is a pain with 3-wire cables.
|
717 |
|
|
* The rtems_termios_ioctl() call below results in a call to
|
718 |
|
|
* cd2401_setAttributes to initialize the line. The caller will "wait"
|
719 |
|
|
* on the ttyMutex that it already owns; this is safe in RTEMS.
|
720 |
|
|
*/
|
721 |
|
|
termios.c_cflag |= CLOCAL; /* Ignore modem status lines */
|
722 |
|
|
newarg.command = RTEMS_IO_SET_ATTRIBUTES;
|
723 |
|
|
sc = rtems_termios_ioctl (&newarg);
|
724 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
725 |
|
|
rtems_fatal_error_occurred (sc);
|
726 |
|
|
|
727 |
|
|
/* Mark that the channel as initialized */
|
728 |
|
|
CD2401_Channel_Info[minor].tty = args->iop->data1;
|
729 |
|
|
|
730 |
|
|
/* If the first of the four channels to open, set up the interrupts */
|
731 |
|
|
if ( !Init_count++ ) {
|
732 |
|
|
/* Install the interrupt handlers */
|
733 |
|
|
Prev_re_isr = (rtems_isr_entry) set_vector( cd2401_re_isr, 0x5C, 1 );
|
734 |
|
|
Prev_modem_isr = (rtems_isr_entry) set_vector( cd2401_modem_isr, 0x5D, 1 );
|
735 |
|
|
Prev_tx_isr = (rtems_isr_entry) set_vector( cd2401_tx_isr, 0x5E, 1 );
|
736 |
|
|
Prev_rx_isr = (rtems_isr_entry) set_vector( cd2401_rx_isr, 0x5F, 1 );
|
737 |
|
|
|
738 |
|
|
cd2401_interrupts_initialize( TRUE );
|
739 |
|
|
}
|
740 |
|
|
|
741 |
|
|
CD2401_RECORD_FIRST_OPEN_INFO(( minor, Init_count ));
|
742 |
|
|
|
743 |
|
|
rtems_interrupt_enable (level);
|
744 |
|
|
|
745 |
|
|
/* Return something */
|
746 |
|
|
return RTEMS_SUCCESSFUL;
|
747 |
|
|
}
|
748 |
|
|
|
749 |
|
|
|
750 |
|
|
/*
|
751 |
|
|
* cd2401_lastClose
|
752 |
|
|
*
|
753 |
|
|
* There are no more opened file descriptors to this device. Close it down.
|
754 |
|
|
*
|
755 |
|
|
* Input parameters:
|
756 |
|
|
* major - device major number
|
757 |
|
|
* minor - channel number
|
758 |
|
|
* arg - pointer to a struct rtems_libio_open_close_args_t
|
759 |
|
|
*/
|
760 |
|
|
int cd2401_lastClose(
|
761 |
|
|
int major,
|
762 |
|
|
int minor,
|
763 |
|
|
void *arg
|
764 |
|
|
)
|
765 |
|
|
{
|
766 |
|
|
rtems_interrupt_level level;
|
767 |
|
|
|
768 |
|
|
rtems_interrupt_disable (level);
|
769 |
|
|
|
770 |
|
|
/* Mark that the channel is no longer is use */
|
771 |
|
|
CD2401_Channel_Info[minor].tty = NULL;
|
772 |
|
|
|
773 |
|
|
/* If the last of the four channels to close, disable the interrupts */
|
774 |
|
|
if ( !--Init_count ) {
|
775 |
|
|
cd2401_interrupts_initialize( FALSE );
|
776 |
|
|
|
777 |
|
|
/* De-install the interrupt handlers */
|
778 |
|
|
set_vector( Prev_re_isr, 0x5C, 1 );
|
779 |
|
|
set_vector( Prev_modem_isr, 0x5D, 1 );
|
780 |
|
|
set_vector( Prev_tx_isr, 0x5E, 1 );
|
781 |
|
|
set_vector( Prev_rx_isr, 0x5F, 1 );
|
782 |
|
|
}
|
783 |
|
|
|
784 |
|
|
CD2401_RECORD_LAST_CLOSE_INFO(( minor, Init_count ));
|
785 |
|
|
|
786 |
|
|
rtems_interrupt_enable (level);
|
787 |
|
|
|
788 |
|
|
/* return something */
|
789 |
|
|
return RTEMS_SUCCESSFUL;
|
790 |
|
|
}
|
791 |
|
|
|
792 |
|
|
|
793 |
|
|
/*
|
794 |
|
|
* cd2401_setAttributes
|
795 |
|
|
*
|
796 |
|
|
* Set up the selected channel of the CD2401 chip for doing asynchronous
|
797 |
|
|
* I/O with DMA.
|
798 |
|
|
*
|
799 |
|
|
* The chip must already have been initialized by cd2401_initialize().
|
800 |
|
|
*
|
801 |
|
|
* This code was written for clarity. The code space it occupies could be
|
802 |
|
|
* reduced. The code could also be compiled with aggressive optimization
|
803 |
|
|
* turned on.
|
804 |
|
|
*
|
805 |
|
|
* Input parameters:
|
806 |
|
|
* minor - the selected channel
|
807 |
|
|
* t - the termios parameters
|
808 |
|
|
*
|
809 |
|
|
* Output parameters: NONE
|
810 |
|
|
*
|
811 |
|
|
* Return value: IGNORED
|
812 |
|
|
*/
|
813 |
|
|
int cd2401_setAttributes(
|
814 |
|
|
int minor,
|
815 |
|
|
const struct termios *t
|
816 |
|
|
)
|
817 |
|
|
{
|
818 |
|
|
rtems_unsigned8 csize, cstopb, parodd, parenb, ignpar, inpck;
|
819 |
|
|
rtems_unsigned8 hw_flow_ctl, sw_flow_ctl, extra_flow_ctl;
|
820 |
|
|
rtems_unsigned8 icrnl, igncr, inlcr, brkint, ignbrk, parmrk, istrip;
|
821 |
|
|
rtems_unsigned8 need_reinitialization = FALSE;
|
822 |
|
|
rtems_unsigned8 read_enabled;
|
823 |
|
|
rtems_unsigned16 tx_period, rx_period;
|
824 |
|
|
rtems_unsigned32 out_baud, in_baud;
|
825 |
|
|
rtems_interrupt_level level;
|
826 |
|
|
|
827 |
|
|
/* Determine what the line parameters should be */
|
828 |
|
|
|
829 |
|
|
/* Output baud rate */
|
830 |
|
|
switch ( cfgetospeed (t) ) {
|
831 |
|
|
default: out_baud = 9600; break;
|
832 |
|
|
case B50: out_baud = 50; break;
|
833 |
|
|
case B75: out_baud = 75; break;
|
834 |
|
|
case B110: out_baud = 110; break;
|
835 |
|
|
case B134: out_baud = 134; break;
|
836 |
|
|
case B150: out_baud = 150; break;
|
837 |
|
|
case B200: out_baud = 200; break;
|
838 |
|
|
case B300: out_baud = 300; break;
|
839 |
|
|
case B600: out_baud = 600; break;
|
840 |
|
|
case B1200: out_baud = 1200; break;
|
841 |
|
|
case B1800: out_baud = 1800; break;
|
842 |
|
|
case B2400: out_baud = 2400; break;
|
843 |
|
|
case B4800: out_baud = 4800; break;
|
844 |
|
|
case B9600: out_baud = 9600; break;
|
845 |
|
|
case B19200: out_baud = 19200; break;
|
846 |
|
|
case B38400: out_baud = 38400; break;
|
847 |
|
|
case B57600: out_baud = 57600; break;
|
848 |
|
|
case B115200: out_baud = 115200; break;
|
849 |
|
|
case B230400: out_baud = 230400; break;
|
850 |
|
|
case B460800: out_baud = 460800; break;
|
851 |
|
|
}
|
852 |
|
|
|
853 |
|
|
/* Input baud rate */
|
854 |
|
|
switch ( cfgetispeed (t) ) {
|
855 |
|
|
default: in_baud = out_baud; break;
|
856 |
|
|
case B50: in_baud = 50; break;
|
857 |
|
|
case B75: in_baud = 75; break;
|
858 |
|
|
case B110: in_baud = 110; break;
|
859 |
|
|
case B134: in_baud = 134; break;
|
860 |
|
|
case B150: in_baud = 150; break;
|
861 |
|
|
case B200: in_baud = 200; break;
|
862 |
|
|
case B300: in_baud = 300; break;
|
863 |
|
|
case B600: in_baud = 600; break;
|
864 |
|
|
case B1200: in_baud = 1200; break;
|
865 |
|
|
case B1800: in_baud = 1800; break;
|
866 |
|
|
case B2400: in_baud = 2400; break;
|
867 |
|
|
case B4800: in_baud = 4800; break;
|
868 |
|
|
case B9600: in_baud = 9600; break;
|
869 |
|
|
case B19200: in_baud = 19200; break;
|
870 |
|
|
case B38400: in_baud = 38400; break;
|
871 |
|
|
case B57600: in_baud = 57600; break;
|
872 |
|
|
case B115200: in_baud = 115200; break;
|
873 |
|
|
case B230400: in_baud = 230400; break;
|
874 |
|
|
case B460800: in_baud = 460800; break;
|
875 |
|
|
}
|
876 |
|
|
|
877 |
|
|
/* Number of bits per char */
|
878 |
|
|
switch ( t->c_cflag & CSIZE ) {
|
879 |
|
|
case CS5: csize = 0x04; break;
|
880 |
|
|
case CS6: csize = 0x05; break;
|
881 |
|
|
case CS7: csize = 0x06; break;
|
882 |
|
|
case CS8: csize = 0x07; break;
|
883 |
|
|
}
|
884 |
|
|
|
885 |
|
|
/* Parity */
|
886 |
|
|
if ( t->c_cflag & PARODD )
|
887 |
|
|
parodd = 0x80; /* Odd parity */
|
888 |
|
|
else
|
889 |
|
|
parodd = 0;
|
890 |
|
|
|
891 |
|
|
if ( t->c_cflag & PARENB )
|
892 |
|
|
parenb = 0x40; /* Parity enabled on Tx and Rx */
|
893 |
|
|
else
|
894 |
|
|
parenb = 0x00; /* No parity on Tx and Rx */
|
895 |
|
|
|
896 |
|
|
/* CD2401 IGNPAR and INPCK bits are inverted wrt POSIX standard? */
|
897 |
|
|
if ( t->c_iflag & INPCK )
|
898 |
|
|
ignpar = 0; /* Check parity on input */
|
899 |
|
|
else
|
900 |
|
|
ignpar = 0x10; /* Do not check parity on input */
|
901 |
|
|
if ( t->c_iflag & IGNPAR ) {
|
902 |
|
|
inpck = 0x03; /* Discard error character */
|
903 |
|
|
parmrk = 0;
|
904 |
|
|
} else {
|
905 |
|
|
if ( t->c_iflag & PARMRK ) {
|
906 |
|
|
inpck = 0x01; /* Translate to 0xFF 0x00 <char> */
|
907 |
|
|
parmrk = 0x04;
|
908 |
|
|
} else {
|
909 |
|
|
inpck = 0x01; /* Translate to 0x00 */
|
910 |
|
|
parmrk = 0;
|
911 |
|
|
}
|
912 |
|
|
}
|
913 |
|
|
|
914 |
|
|
/* Stop bits */
|
915 |
|
|
if ( t->c_cflag & CSTOPB )
|
916 |
|
|
cstopb = 0x04; /* Two stop bits */
|
917 |
|
|
else
|
918 |
|
|
cstopb = 0x02; /* One stop bit */
|
919 |
|
|
|
920 |
|
|
/* Modem flow control */
|
921 |
|
|
if ( t->c_cflag & CLOCAL )
|
922 |
|
|
hw_flow_ctl = 0x04; /* Always assert RTS before Tx */
|
923 |
|
|
else
|
924 |
|
|
hw_flow_ctl = 0x07; /* Always assert RTS before Tx,
|
925 |
|
|
wait for CTS and DSR */
|
926 |
|
|
|
927 |
|
|
/* XON/XOFF Tx flow control */
|
928 |
|
|
if ( t->c_iflag & IXON ) {
|
929 |
|
|
sw_flow_ctl = 0x40; /* Tx in-band flow ctl enabled, wait for XON */
|
930 |
|
|
extra_flow_ctl = 0x30; /* Eat XON/XOFF, XON/XOFF in SCHR1, SCHR2 */
|
931 |
|
|
}
|
932 |
|
|
else {
|
933 |
|
|
sw_flow_ctl = 0; /* Tx in-band flow ctl disabled */
|
934 |
|
|
extra_flow_ctl = 0; /* Pass on XON/XOFF */
|
935 |
|
|
}
|
936 |
|
|
|
937 |
|
|
/* CL/LF translation */
|
938 |
|
|
if ( t->c_iflag & ICRNL )
|
939 |
|
|
icrnl = 0x40; /* Map CR to NL on input */
|
940 |
|
|
else
|
941 |
|
|
icrnl = 0; /* Pass on CR */
|
942 |
|
|
if ( t->c_iflag & INLCR )
|
943 |
|
|
inlcr = 0x20; /* Map NL to CR on input */
|
944 |
|
|
else
|
945 |
|
|
inlcr = 0; /* Pass on NL */
|
946 |
|
|
if ( t->c_iflag & IGNCR )
|
947 |
|
|
igncr = 0x80; /* CR discarded on input */
|
948 |
|
|
else
|
949 |
|
|
igncr = 0;
|
950 |
|
|
|
951 |
|
|
/* Break handling */
|
952 |
|
|
if ( t->c_iflag & IGNBRK ) {
|
953 |
|
|
ignbrk = 0x10; /* Ignore break on input */
|
954 |
|
|
brkint = 0x08;
|
955 |
|
|
} else {
|
956 |
|
|
if ( t->c_iflag & BRKINT ) {
|
957 |
|
|
ignbrk = 0; /* Generate SIGINT (interrupt ) */
|
958 |
|
|
brkint = 0;
|
959 |
|
|
} else {
|
960 |
|
|
ignbrk = 0; /* Convert to 0x00 */
|
961 |
|
|
brkint = 0x08;
|
962 |
|
|
}
|
963 |
|
|
}
|
964 |
|
|
|
965 |
|
|
/* Stripping */
|
966 |
|
|
if ( t->c_iflag & ISTRIP )
|
967 |
|
|
istrip = 0x80; /* Strip to 7 bits */
|
968 |
|
|
else
|
969 |
|
|
istrip = 0; /* Leave as 8 bits */
|
970 |
|
|
|
971 |
|
|
rx_period = cd2401_bitrate_divisor( 20000000Ul, &in_baud );
|
972 |
|
|
tx_period = cd2401_bitrate_divisor( 20000000Ul, &out_baud );
|
973 |
|
|
|
974 |
|
|
/*
|
975 |
|
|
* If this is the first time that the line characteristics are set up, then
|
976 |
|
|
* the device must be re-initialized.
|
977 |
|
|
* Also check if we need to change anything. It is preferable to not touch
|
978 |
|
|
* the device if nothing changes. As soon as we touch it, it tends to
|
979 |
|
|
* glitch. If anything changes, we reprogram all registers. This is
|
980 |
|
|
* harmless.
|
981 |
|
|
*/
|
982 |
|
|
if ( ( CD2401_Channel_Info[minor].tty == 0 ) ||
|
983 |
|
|
( cd2401->cor1 != (parodd | parenb | ignpar | csize) ) ||
|
984 |
|
|
( cd2401->cor2 != (sw_flow_ctl | hw_flow_ctl) ) ||
|
985 |
|
|
( cd2401->cor3 != (extra_flow_ctl | cstopb) ) ||
|
986 |
|
|
( cd2401->cor6 != (igncr | icrnl | inlcr | ignbrk | brkint | parmrk | inpck) ) ||
|
987 |
|
|
( cd2401->cor7 != istrip ) ||
|
988 |
|
|
( cd2401->u1.async.schr1 != t->c_cc[VSTART] ) ||
|
989 |
|
|
( cd2401->u1.async.schr2 != t->c_cc[VSTOP] ) ||
|
990 |
|
|
( cd2401->rbpr != (unsigned char)rx_period ) ||
|
991 |
|
|
( cd2401->rcor != (unsigned char)(rx_period >> 8) ) ||
|
992 |
|
|
( cd2401->tbpr != (unsigned char)tx_period ) ||
|
993 |
|
|
( cd2401->tcor != ( (tx_period >> 3) & 0xE0 ) ) )
|
994 |
|
|
need_reinitialization = TRUE;
|
995 |
|
|
|
996 |
|
|
/* Write to the ports */
|
997 |
|
|
rtems_interrupt_disable (level);
|
998 |
|
|
|
999 |
|
|
cd2401->car = minor; /* Select channel */
|
1000 |
|
|
read_enabled = cd2401->csr & 0x80 ? TRUE : FALSE;
|
1001 |
|
|
|
1002 |
|
|
if ( (t->c_cflag & CREAD ? TRUE : FALSE ) != read_enabled ) {
|
1003 |
|
|
/* Read enable status is changing */
|
1004 |
|
|
need_reinitialization = TRUE;
|
1005 |
|
|
}
|
1006 |
|
|
|
1007 |
|
|
if ( need_reinitialization ) {
|
1008 |
|
|
/*
|
1009 |
|
|
* Could not find a way to test whether the CD2401 was done transmitting.
|
1010 |
|
|
* The TxEmpty interrupt does not seem to indicate that the FIFO is empty
|
1011 |
|
|
* in DMA mode. So, just wait a while for output to drain. May not be
|
1012 |
|
|
* enough, but it will have to do (should be long enough for 1 char at
|
1013 |
|
|
* 9600 bsp)...
|
1014 |
|
|
*/
|
1015 |
|
|
cd2401_udelay( 2000L );
|
1016 |
|
|
|
1017 |
|
|
/* Clear channel */
|
1018 |
|
|
cd2401_chan_cmd (minor, 0x40, 1);
|
1019 |
|
|
|
1020 |
|
|
cd2401->car = minor; /* Select channel */
|
1021 |
|
|
cd2401->cmr = 0x42; /* Interrupt Rx, DMA Tx, async mode */
|
1022 |
|
|
cd2401->cor1 = parodd | parenb | ignpar | csize;
|
1023 |
|
|
cd2401->cor2 = sw_flow_ctl | hw_flow_ctl;
|
1024 |
|
|
cd2401->cor3 = extra_flow_ctl | cstopb;
|
1025 |
|
|
cd2401->cor4 = 0x0A; /* No DSR/DCD/CTS detect; FIFO threshold of 10 */
|
1026 |
|
|
cd2401->cor5 = 0x0A; /* No DSR/DCD/CTS detect; DTR threshold of 10 */
|
1027 |
|
|
cd2401->cor6 = igncr | icrnl | inlcr | ignbrk | brkint | parmrk | inpck;
|
1028 |
|
|
cd2401->cor7 = istrip; /* No LNext; ignore XON/XOFF if frame error; no tx translations */
|
1029 |
|
|
/* Special char 1: XON character */
|
1030 |
|
|
cd2401->u1.async.schr1 = t->c_cc[VSTART];
|
1031 |
|
|
/* special char 2: XOFF character */
|
1032 |
|
|
cd2401->u1.async.schr2 = t->c_cc[VSTOP];
|
1033 |
|
|
|
1034 |
|
|
/*
|
1035 |
|
|
* Special chars 3 and 4, char range, LNext, RFAR[1..4] and CRC
|
1036 |
|
|
* are unused, left as is.
|
1037 |
|
|
*/
|
1038 |
|
|
|
1039 |
|
|
/* Set baudrates for receiver and transmitter */
|
1040 |
|
|
cd2401->rbpr = (unsigned char)rx_period;
|
1041 |
|
|
cd2401->rcor = (unsigned char)(rx_period >> 8); /* no DPLL */
|
1042 |
|
|
cd2401->tbpr = (unsigned char)tx_period;
|
1043 |
|
|
cd2401->tcor = (tx_period >> 3) & 0xE0; /* no x1 ext clk, no loopback */
|
1044 |
|
|
|
1045 |
|
|
/* Timeout for 4 chars at 9600, 8 bits per char, 1 stop bit */
|
1046 |
|
|
cd2401->u2.w.rtpr = 0x04; /* NEED TO LOOK AT THIS LINE! */
|
1047 |
|
|
|
1048 |
|
|
if ( t->c_cflag & CREAD ) {
|
1049 |
|
|
/* Re-initialize channel, enable rx and tx */
|
1050 |
|
|
cd2401_chan_cmd (minor, 0x2A, 1);
|
1051 |
|
|
/* Enable rx data ints */
|
1052 |
|
|
cd2401->ier = 0x08;
|
1053 |
|
|
} else {
|
1054 |
|
|
/* Re-initialize channel, enable tx, disable rx */
|
1055 |
|
|
cd2401_chan_cmd (minor, 0x29, 1);
|
1056 |
|
|
}
|
1057 |
|
|
}
|
1058 |
|
|
|
1059 |
|
|
CD2401_RECORD_SET_ATTRIBUTES_INFO(( minor, need_reinitialization, csize,
|
1060 |
|
|
cstopb, parodd, parenb, ignpar, inpck,
|
1061 |
|
|
hw_flow_ctl, sw_flow_ctl, extra_flow_ctl,
|
1062 |
|
|
icrnl, igncr, inlcr, brkint, ignbrk,
|
1063 |
|
|
parmrk, istrip, tx_period, rx_period,
|
1064 |
|
|
out_baud, in_baud ));
|
1065 |
|
|
|
1066 |
|
|
rtems_interrupt_enable (level);
|
1067 |
|
|
|
1068 |
|
|
/*
|
1069 |
|
|
* Looks like the CD2401 needs time to settle after initialization. Give it
|
1070 |
|
|
* 10 ms. I don't really believe it, but if output resumes to quickly after
|
1071 |
|
|
* this call, the first few characters are not right.
|
1072 |
|
|
*/
|
1073 |
|
|
if ( need_reinitialization )
|
1074 |
|
|
cd2401_udelay( 10000L );
|
1075 |
|
|
|
1076 |
|
|
/* Return something */
|
1077 |
|
|
return RTEMS_SUCCESSFUL;
|
1078 |
|
|
}
|
1079 |
|
|
|
1080 |
|
|
|
1081 |
|
|
/*
|
1082 |
|
|
* cd2401_startRemoreTx
|
1083 |
|
|
*
|
1084 |
|
|
* Defined as a callback, but it would appear that it is never called. The
|
1085 |
|
|
* POSIX standard states that when the tcflow() function is called with the
|
1086 |
|
|
* TCION action, the system wall transmit a START character. Presumably,
|
1087 |
|
|
* tcflow() is called internally when IXOFF is set in the termios c_iflag
|
1088 |
|
|
* field when the input buffer can accomodate enough characters. It should
|
1089 |
|
|
* probably be called from fillBufferQueue(). Clearly, the function is also
|
1090 |
|
|
* explicitly callable by user code. The action is clearly to send the START
|
1091 |
|
|
* character, regardless of whether START/STOP flow control is in effect.
|
1092 |
|
|
*
|
1093 |
|
|
* Input parameters:
|
1094 |
|
|
* minor - selected channel
|
1095 |
|
|
*
|
1096 |
|
|
* Output parameters: NONE
|
1097 |
|
|
*
|
1098 |
|
|
* Return value: IGNORED
|
1099 |
|
|
*
|
1100 |
|
|
* PROPER START CHARACTER MUST BE PROGRAMMED IN SCHR1.
|
1101 |
|
|
*/
|
1102 |
|
|
int cd2401_startRemoteTx(
|
1103 |
|
|
int minor
|
1104 |
|
|
)
|
1105 |
|
|
{
|
1106 |
|
|
rtems_interrupt_level level;
|
1107 |
|
|
|
1108 |
|
|
rtems_interrupt_disable (level);
|
1109 |
|
|
|
1110 |
|
|
cd2401->car = minor; /* Select channel */
|
1111 |
|
|
cd2401->stcr = 0x01; /* Send SCHR1 ahead of chars in FIFO */
|
1112 |
|
|
|
1113 |
|
|
CD2401_RECORD_START_REMOTE_TX_INFO(( minor ));
|
1114 |
|
|
|
1115 |
|
|
rtems_interrupt_enable (level);
|
1116 |
|
|
|
1117 |
|
|
/* Return something */
|
1118 |
|
|
return RTEMS_SUCCESSFUL;
|
1119 |
|
|
}
|
1120 |
|
|
|
1121 |
|
|
|
1122 |
|
|
/*
|
1123 |
|
|
* cd2401_stopRemoteTx
|
1124 |
|
|
*
|
1125 |
|
|
* Defined as a callback, but it would appear that it is never called. The
|
1126 |
|
|
* POSIX standard states that when the tcflow() function is called with the
|
1127 |
|
|
* TCIOFF function, the system wall transmit a STOP character. Presumably,
|
1128 |
|
|
* tcflow() is called internally when IXOFF is set in the termios c_iflag
|
1129 |
|
|
* field as the input buffer is about to overflow. It should probably be
|
1130 |
|
|
* called from rtems_termios_enqueue_raw_characters(). Clearly, the function
|
1131 |
|
|
* is also explicitly callable by user code. The action is clearly to send
|
1132 |
|
|
* the STOP character, regardless of whether START/STOP flow control is in
|
1133 |
|
|
* effect.
|
1134 |
|
|
*
|
1135 |
|
|
* Input parameters:
|
1136 |
|
|
* minor - selected channel
|
1137 |
|
|
*
|
1138 |
|
|
* Output parameters: NONE
|
1139 |
|
|
*
|
1140 |
|
|
* Return value: IGNORED
|
1141 |
|
|
*
|
1142 |
|
|
* PROPER STOP CHARACTER MUST BE PROGRAMMED IN SCHR2.
|
1143 |
|
|
*/
|
1144 |
|
|
int cd2401_stopRemoteTx(
|
1145 |
|
|
int minor
|
1146 |
|
|
)
|
1147 |
|
|
{
|
1148 |
|
|
rtems_interrupt_level level;
|
1149 |
|
|
|
1150 |
|
|
rtems_interrupt_disable (level);
|
1151 |
|
|
|
1152 |
|
|
cd2401->car = minor; /* Select channel */
|
1153 |
|
|
cd2401->stcr = 0x02; /* Send SCHR2 ahead of chars in FIFO */
|
1154 |
|
|
|
1155 |
|
|
CD2401_RECORD_STOP_REMOTE_TX_INFO(( minor ));
|
1156 |
|
|
|
1157 |
|
|
rtems_interrupt_enable (level);
|
1158 |
|
|
|
1159 |
|
|
/* Return something */
|
1160 |
|
|
return RTEMS_SUCCESSFUL;
|
1161 |
|
|
}
|
1162 |
|
|
|
1163 |
|
|
|
1164 |
|
|
/*
|
1165 |
|
|
* cd2401_write
|
1166 |
|
|
*
|
1167 |
|
|
* Initiate DMA output. Termios guarantees that the buffer does not wrap
|
1168 |
|
|
* around, so we can do DMA strait from the supplied buffer.
|
1169 |
|
|
*
|
1170 |
|
|
* Input parameters:
|
1171 |
|
|
* minor - selected channel
|
1172 |
|
|
* buf - output buffer
|
1173 |
|
|
* len - number of chars to output
|
1174 |
|
|
*
|
1175 |
|
|
* Output parameters: NONE
|
1176 |
|
|
*
|
1177 |
|
|
* Return value: IGNORED
|
1178 |
|
|
*
|
1179 |
|
|
* MUST BE EXECUTED WITH THE CD2401 INTERRUPTS DISABLED!
|
1180 |
|
|
* The processor is placed at interrupt level CD2401_INT_LEVEL explicitly in
|
1181 |
|
|
* console_write(). The processor is necessarily at interrupt level 1 in
|
1182 |
|
|
* cd2401_tx_isr().
|
1183 |
|
|
*/
|
1184 |
|
|
int cd2401_write(
|
1185 |
|
|
int minor,
|
1186 |
|
|
const char *buf,
|
1187 |
|
|
int len
|
1188 |
|
|
)
|
1189 |
|
|
{
|
1190 |
|
|
cd2401->car = minor; /* Select channel */
|
1191 |
|
|
|
1192 |
|
|
if ( (cd2401->dmabsts & 0x08) == 0 ) {
|
1193 |
|
|
/* Next buffer is A. Wait for it to be ours. */
|
1194 |
|
|
while ( cd2401->atbsts & 0x01 );
|
1195 |
|
|
|
1196 |
|
|
CD2401_Channel_Info[minor].own_buf_A = FALSE;
|
1197 |
|
|
CD2401_Channel_Info[minor].len = len;
|
1198 |
|
|
CD2401_Channel_Info[minor].buf = buf;
|
1199 |
|
|
cd2401->atbadru = (rtems_unsigned16)( ( (rtems_unsigned32) buf ) >> 16 );
|
1200 |
|
|
cd2401->atbadrl = (rtems_unsigned16)( (rtems_unsigned32) buf );
|
1201 |
|
|
cd2401->atbcnt = len;
|
1202 |
|
|
CD2401_RECORD_WRITE_INFO(( len, buf, 'A' ));
|
1203 |
|
|
cd2401->atbsts = 0x03; /* CD2401 owns buffer, int when empty */
|
1204 |
|
|
}
|
1205 |
|
|
else {
|
1206 |
|
|
/* Next buffer is B. Wait for it to be ours. */
|
1207 |
|
|
while ( cd2401->btbsts & 0x01 );
|
1208 |
|
|
|
1209 |
|
|
CD2401_Channel_Info[minor].own_buf_B = FALSE;
|
1210 |
|
|
CD2401_Channel_Info[minor].len = len;
|
1211 |
|
|
CD2401_Channel_Info[minor].buf = buf;
|
1212 |
|
|
cd2401->btbadru = (rtems_unsigned16)( ( (rtems_unsigned32) buf ) >> 16 );
|
1213 |
|
|
cd2401->btbadrl = (rtems_unsigned16)( (rtems_unsigned32) buf );
|
1214 |
|
|
cd2401->btbcnt = len;
|
1215 |
|
|
CD2401_RECORD_WRITE_INFO(( len, buf, 'B' ));
|
1216 |
|
|
cd2401->btbsts = 0x03; /* CD2401 owns buffer, int when empty */
|
1217 |
|
|
}
|
1218 |
|
|
/* Nuts -- Need TxD ints */
|
1219 |
|
|
CD2401_Channel_Info[minor].txEmpty = FALSE;
|
1220 |
|
|
cd2401->ier |= 0x01;
|
1221 |
|
|
|
1222 |
|
|
/* Return something */
|
1223 |
|
|
return RTEMS_SUCCESSFUL;
|
1224 |
|
|
}
|
1225 |
|
|
|
1226 |
|
|
#if 0
|
1227 |
|
|
/*
|
1228 |
|
|
* cd2401_drainOutput
|
1229 |
|
|
*
|
1230 |
|
|
* Wait for the txEmpty indication on the specified channel.
|
1231 |
|
|
*
|
1232 |
|
|
* Input parameters:
|
1233 |
|
|
* minor - selected channel
|
1234 |
|
|
*
|
1235 |
|
|
* Output parameters: NONE
|
1236 |
|
|
*
|
1237 |
|
|
* Return value: IGNORED
|
1238 |
|
|
*
|
1239 |
|
|
* MUST NOT BE EXECUTED WITH THE CD2401 INTERRUPTS DISABLED!
|
1240 |
|
|
* The txEmpty flag is set by the tx ISR.
|
1241 |
|
|
*/
|
1242 |
|
|
int cd2401_drainOutput(
|
1243 |
|
|
int minor
|
1244 |
|
|
)
|
1245 |
|
|
{
|
1246 |
|
|
CD2401_RECORD_DRAIN_OUTPUT_INFO(( CD2401_Channel_Info[minor].txEmpty,
|
1247 |
|
|
CD2401_Channel_Info[minor].own_buf_A,
|
1248 |
|
|
CD2401_Channel_Info[minor].own_buf_B ));
|
1249 |
|
|
|
1250 |
|
|
while( ! (CD2401_Channel_Info[minor].txEmpty &&
|
1251 |
|
|
CD2401_Channel_Info[minor].own_buf_A &&
|
1252 |
|
|
CD2401_Channel_Info[minor].own_buf_B) );
|
1253 |
|
|
|
1254 |
|
|
/* Return something */
|
1255 |
|
|
return RTEMS_SUCCESSFUL;
|
1256 |
|
|
}
|
1257 |
|
|
#endif
|
1258 |
|
|
|
1259 |
|
|
|
1260 |
|
|
/*
|
1261 |
|
|
* _167Bug_pollRead
|
1262 |
|
|
*
|
1263 |
|
|
* Read a character from the 167Bug console, and return it. Return -1
|
1264 |
|
|
* if there is no character in the input FIFO.
|
1265 |
|
|
*
|
1266 |
|
|
* Input parameters:
|
1267 |
|
|
* minor - selected channel
|
1268 |
|
|
*
|
1269 |
|
|
* Output parameters: NONE
|
1270 |
|
|
*
|
1271 |
|
|
* Return value: char returned as positive signed int
|
1272 |
|
|
* -1 if no character is present in the input FIFO.
|
1273 |
|
|
*
|
1274 |
|
|
* CANNOT BE COMBINED WITH INTERRUPT DRIVEN I/O!
|
1275 |
|
|
* This function is invoked when the device driver is compiled with
|
1276 |
|
|
* CD2401_POLLED_IO set to 1 above. All I/O is then done through 167Bug.
|
1277 |
|
|
*/
|
1278 |
|
|
int _167Bug_pollRead(
|
1279 |
|
|
int minor
|
1280 |
|
|
)
|
1281 |
|
|
{
|
1282 |
|
|
int char_not_available;
|
1283 |
|
|
unsigned char c;
|
1284 |
|
|
|
1285 |
|
|
/* Check for a char in the input FIFO */
|
1286 |
|
|
asm volatile( "movew #0x1, -(%%sp) /* Code for .INSTAT */
|
1287 |
|
|
movew %1, -(%%sp) /* Channel */
|
1288 |
|
|
trap #15 /* Trap to 167Bug */
|
1289 |
|
|
.short 0x60 /* Code for .REDIR */
|
1290 |
|
|
move %%cc, %0 /* Get condition codes */
|
1291 |
|
|
andil #4, %0" /* Keep the Zero bit */
|
1292 |
|
|
: "=d" (char_not_available) : "d" (minor): "%%cc" );
|
1293 |
|
|
|
1294 |
|
|
if (char_not_available)
|
1295 |
|
|
return -1;
|
1296 |
|
|
|
1297 |
|
|
/* Read the char and return it */
|
1298 |
|
|
asm volatile( "subq.l #2,%%a7 /* Space for result */
|
1299 |
|
|
movew #0x0, -(%%sp) /* Code for .INCHR */
|
1300 |
|
|
movew %1, -(%%sp) /* Channel */
|
1301 |
|
|
trap #15 /* Trap to 167 Bug */
|
1302 |
|
|
.short 0x60 /* Code for .REDIR */
|
1303 |
|
|
moveb (%%a7)+, %0" /* Pop char into c */
|
1304 |
|
|
: "=d" (c) : "d" (minor) );
|
1305 |
|
|
|
1306 |
|
|
return (int)c;
|
1307 |
|
|
}
|
1308 |
|
|
|
1309 |
|
|
|
1310 |
|
|
/*
|
1311 |
|
|
* _167Bug_pollWrite
|
1312 |
|
|
*
|
1313 |
|
|
* Output buffer through 167Bug. Returns only once every character has been
|
1314 |
|
|
* sent (polled output).
|
1315 |
|
|
*
|
1316 |
|
|
* Input parameters:
|
1317 |
|
|
* minor - selected channel
|
1318 |
|
|
* buf - output buffer
|
1319 |
|
|
* len - number of chars to output
|
1320 |
|
|
*
|
1321 |
|
|
* Output parameters: NONE
|
1322 |
|
|
*
|
1323 |
|
|
* Return value: IGNORED
|
1324 |
|
|
*
|
1325 |
|
|
* CANNOT BE COMBINED WITH INTERRUPT DRIVEN I/O!
|
1326 |
|
|
* This function is invoked when the device driver is compiled with
|
1327 |
|
|
* CD2401_POLLED_IO set to 1 above. All I/O is then done through 167Bug.
|
1328 |
|
|
*/
|
1329 |
|
|
int _167Bug_pollWrite(
|
1330 |
|
|
int minor,
|
1331 |
|
|
const char *buf,
|
1332 |
|
|
int len
|
1333 |
|
|
)
|
1334 |
|
|
{
|
1335 |
|
|
const char *endbuf = buf + len;
|
1336 |
|
|
|
1337 |
|
|
asm volatile( "pea (%0) /* endbuf */
|
1338 |
|
|
pea (%1) /* buf */
|
1339 |
|
|
movew #0x21, -(%%sp) /* Code for .OUTSTR */
|
1340 |
|
|
movew %2, -(%%sp) /* Channel */
|
1341 |
|
|
trap #15 /* Trap to 167Bug */
|
1342 |
|
|
.short 0x60" /* Code for .REDIR */
|
1343 |
|
|
:: "a" (endbuf), "a" (buf), "d" (minor) );
|
1344 |
|
|
|
1345 |
|
|
/* Return something */
|
1346 |
|
|
return RTEMS_SUCCESSFUL;
|
1347 |
|
|
}
|
1348 |
|
|
|
1349 |
|
|
|
1350 |
|
|
/*
|
1351 |
|
|
* Print functions: prototyped in bsp.h
|
1352 |
|
|
* Debug printing on Channel 1
|
1353 |
|
|
*/
|
1354 |
|
|
|
1355 |
|
|
void printk( char *fmt, ... )
|
1356 |
|
|
{
|
1357 |
|
|
va_list ap; /* points to each unnamed argument in turn */
|
1358 |
|
|
static char buf[256];
|
1359 |
|
|
unsigned int level;
|
1360 |
|
|
|
1361 |
|
|
_CPU_ISR_Disable(level);
|
1362 |
|
|
|
1363 |
|
|
va_start(ap, fmt); /* make ap point to 1st unnamed arg */
|
1364 |
|
|
vsprintf(buf, fmt, ap); /* send output to buffer */
|
1365 |
|
|
|
1366 |
|
|
BSP_output_string(buf); /* print buffer -- Channel 1 */
|
1367 |
|
|
|
1368 |
|
|
va_end(ap); /* clean up and re-enable interrupts */
|
1369 |
|
|
_CPU_ISR_Enable(level);
|
1370 |
|
|
}
|
1371 |
|
|
|
1372 |
|
|
|
1373 |
|
|
void BSP_output_string( char * buf )
|
1374 |
|
|
{
|
1375 |
|
|
int len = strlen(buf);
|
1376 |
|
|
rtems_status_code sc;
|
1377 |
|
|
|
1378 |
|
|
/* The first argument forces a print to Port2 (ttyS1) */
|
1379 |
|
|
sc = _167Bug_pollWrite(1, buf, len);
|
1380 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
1381 |
|
|
rtems_fatal_error_occurred (sc);
|
1382 |
|
|
}
|
1383 |
|
|
|
1384 |
|
|
|
1385 |
|
|
/*
|
1386 |
|
|
***************
|
1387 |
|
|
* BOILERPLATE *
|
1388 |
|
|
***************
|
1389 |
|
|
*
|
1390 |
|
|
* All these functions are prototyped in rtems/c/src/lib/include/console.h.
|
1391 |
|
|
*/
|
1392 |
|
|
|
1393 |
|
|
/*
|
1394 |
|
|
* Initialize and register the device
|
1395 |
|
|
*/
|
1396 |
|
|
rtems_device_driver console_initialize(
|
1397 |
|
|
rtems_device_major_number major,
|
1398 |
|
|
rtems_device_minor_number minor,
|
1399 |
|
|
void *arg
|
1400 |
|
|
)
|
1401 |
|
|
{
|
1402 |
|
|
rtems_status_code status;
|
1403 |
|
|
|
1404 |
|
|
/*
|
1405 |
|
|
* Set up TERMIOS
|
1406 |
|
|
*/
|
1407 |
|
|
rtems_termios_initialize ();
|
1408 |
|
|
|
1409 |
|
|
/*
|
1410 |
|
|
* Do device-specific initialization
|
1411 |
|
|
*/
|
1412 |
|
|
cd2401_initialize ();
|
1413 |
|
|
|
1414 |
|
|
/*
|
1415 |
|
|
* Register the devices
|
1416 |
|
|
*/
|
1417 |
|
|
status = rtems_io_register_name ("/dev/tty0", major, 0);
|
1418 |
|
|
if (status != RTEMS_SUCCESSFUL)
|
1419 |
|
|
rtems_fatal_error_occurred (status);
|
1420 |
|
|
|
1421 |
|
|
status = rtems_io_register_name ("/dev/tty1", major, 1);
|
1422 |
|
|
if (status != RTEMS_SUCCESSFUL)
|
1423 |
|
|
rtems_fatal_error_occurred (status);
|
1424 |
|
|
|
1425 |
|
|
status = rtems_io_register_name ("/dev/console", major, 1);
|
1426 |
|
|
if (status != RTEMS_SUCCESSFUL)
|
1427 |
|
|
rtems_fatal_error_occurred (status);
|
1428 |
|
|
|
1429 |
|
|
status = rtems_io_register_name ("/dev/tty2", major, 2);
|
1430 |
|
|
if (status != RTEMS_SUCCESSFUL)
|
1431 |
|
|
rtems_fatal_error_occurred (status);
|
1432 |
|
|
|
1433 |
|
|
status = rtems_io_register_name ("/dev/tty3", major, 3);
|
1434 |
|
|
if (status != RTEMS_SUCCESSFUL)
|
1435 |
|
|
rtems_fatal_error_occurred (status);
|
1436 |
|
|
|
1437 |
|
|
return RTEMS_SUCCESSFUL;
|
1438 |
|
|
}
|
1439 |
|
|
|
1440 |
|
|
/*
|
1441 |
|
|
* Open the device
|
1442 |
|
|
*/
|
1443 |
|
|
rtems_device_driver console_open(
|
1444 |
|
|
rtems_device_major_number major,
|
1445 |
|
|
rtems_device_minor_number minor,
|
1446 |
|
|
void * arg
|
1447 |
|
|
)
|
1448 |
|
|
{
|
1449 |
|
|
#if CD2401_POLLED_IO
|
1450 |
|
|
|
1451 |
|
|
/* I/O is limited to 167Bug console. minor is ignored! */
|
1452 |
|
|
static const rtems_termios_callbacks callbacks = {
|
1453 |
|
|
NULL, /* firstOpen */
|
1454 |
|
|
NULL, /* lastClose */
|
1455 |
|
|
_167Bug_pollRead, /* pollRead */
|
1456 |
|
|
_167Bug_pollWrite, /* write */
|
1457 |
|
|
NULL, /* setAttributes */
|
1458 |
|
|
NULL, /* stopRemoteTx */
|
1459 |
|
|
NULL, /* startRemoteTx */
|
1460 |
|
|
|
1461 |
|
|
};
|
1462 |
|
|
|
1463 |
|
|
#else
|
1464 |
|
|
|
1465 |
|
|
static const rtems_termios_callbacks callbacks = {
|
1466 |
|
|
cd2401_firstOpen, /* firstOpen */
|
1467 |
|
|
cd2401_lastClose, /* lastClose */
|
1468 |
|
|
NULL, /* pollRead */
|
1469 |
|
|
cd2401_write, /* write */
|
1470 |
|
|
cd2401_setAttributes, /* setAttributes */
|
1471 |
|
|
cd2401_stopRemoteTx, /* stopRemoteTx */
|
1472 |
|
|
cd2401_startRemoteTx, /* startRemoteTx */
|
1473 |
|
|
1 /* outputUsesInterrupts */
|
1474 |
|
|
};
|
1475 |
|
|
|
1476 |
|
|
#endif
|
1477 |
|
|
|
1478 |
|
|
return rtems_termios_open (major, minor, arg, &callbacks);
|
1479 |
|
|
}
|
1480 |
|
|
|
1481 |
|
|
/*
|
1482 |
|
|
* Close the device
|
1483 |
|
|
*/
|
1484 |
|
|
rtems_device_driver console_close(
|
1485 |
|
|
rtems_device_major_number major,
|
1486 |
|
|
rtems_device_minor_number minor,
|
1487 |
|
|
void * arg
|
1488 |
|
|
)
|
1489 |
|
|
{
|
1490 |
|
|
return rtems_termios_close (arg);
|
1491 |
|
|
}
|
1492 |
|
|
|
1493 |
|
|
/*
|
1494 |
|
|
* Read from the device
|
1495 |
|
|
*/
|
1496 |
|
|
rtems_device_driver console_read(
|
1497 |
|
|
rtems_device_major_number major,
|
1498 |
|
|
rtems_device_minor_number minor,
|
1499 |
|
|
void * arg
|
1500 |
|
|
)
|
1501 |
|
|
{
|
1502 |
|
|
return rtems_termios_read (arg);
|
1503 |
|
|
}
|
1504 |
|
|
|
1505 |
|
|
/*
|
1506 |
|
|
* Write to the device
|
1507 |
|
|
*/
|
1508 |
|
|
rtems_device_driver console_write(
|
1509 |
|
|
rtems_device_major_number major,
|
1510 |
|
|
rtems_device_minor_number minor,
|
1511 |
|
|
void * arg
|
1512 |
|
|
)
|
1513 |
|
|
{
|
1514 |
|
|
return rtems_termios_write (arg);
|
1515 |
|
|
}
|
1516 |
|
|
|
1517 |
|
|
/*
|
1518 |
|
|
* Handle ioctl request.
|
1519 |
|
|
*/
|
1520 |
|
|
rtems_device_driver console_control(
|
1521 |
|
|
rtems_device_major_number major,
|
1522 |
|
|
rtems_device_minor_number minor,
|
1523 |
|
|
void * arg
|
1524 |
|
|
)
|
1525 |
|
|
{
|
1526 |
|
|
return rtems_termios_ioctl (arg);
|
1527 |
|
|
}
|