1 /***************************************************************************
2 * Copyright (C) 2006 by Anders Larsen *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
24 #define INCLUDE_JTAG_INTERFACE_H
32 #define AT91C_BASE_SYS (0xfffff000)
40 #define PIO_PER (0) /* PIO enable */
41 #define PIO_OER (4) /* output enable */
42 #define PIO_ODR (5) /* output disable */
43 #define PIO_SODR (12) /* set output data */
44 #define PIO_CODR (13) /* clear output data */
45 #define PIO_PDSR (15) /* pin data status */
46 #define PIO_PPUER (25) /* pull-up enable */
48 #define NC (0) /* not connected */
85 int TDO_PIO
; /* PIO holding TDO */
86 u32 TDO_MASK
; /* TDO bitmask */
87 int TRST_PIO
; /* PIO holding TRST */
88 u32 TRST_MASK
; /* TRST bitmask */
89 int TMS_PIO
; /* PIO holding TMS */
90 u32 TMS_MASK
; /* TMS bitmask */
91 int TCK_PIO
; /* PIO holding TCK */
92 u32 TCK_MASK
; /* TCK bitmask */
93 int TDI_PIO
; /* PIO holding TDI */
94 u32 TDI_MASK
; /* TDI bitmask */
95 int SRST_PIO
; /* PIO holding SRST */
96 u32 SRST_MASK
; /* SRST bitmask */
99 static struct device_t devices
[] =
101 { "rea_ecr", PIOD
, P27
, PIOA
, NC
, PIOD
, P23
, PIOD
, P24
, PIOD
, P26
, PIOC
, P5
},
106 static char* at91rm9200_device
;
108 /* interface variables
110 static struct device_t
* device
;
111 static int dev_mem_fd
;
112 static void *sys_controller
;
113 static u32
* pio_base
;
115 /* low level command set
117 static int at91rm9200_read(void);
118 static void at91rm9200_write(int tck
, int tms
, int tdi
);
119 static void at91rm9200_reset(int trst
, int srst
);
121 static int at91rm9200_speed(int speed
);
122 static int at91rm9200_register_commands(struct command_context_s
*cmd_ctx
);
123 static int at91rm9200_init(void);
124 static int at91rm9200_quit(void);
126 jtag_interface_t at91rm9200_interface
=
128 .name
= "at91rm9200",
130 .execute_queue
= bitbang_execute_queue
,
132 .speed
= at91rm9200_speed
,
133 .register_commands
= at91rm9200_register_commands
,
134 .init
= at91rm9200_init
,
135 .quit
= at91rm9200_quit
,
138 static bitbang_interface_t at91rm9200_bitbang
=
140 .read
= at91rm9200_read
,
141 .write
= at91rm9200_write
,
142 .reset
= at91rm9200_reset
,
146 static int at91rm9200_read(void)
148 return (pio_base
[device
->TDO_PIO
+ PIO_PDSR
] & device
->TDO_MASK
) != 0;
151 static void at91rm9200_write(int tck
, int tms
, int tdi
)
154 pio_base
[device
->TCK_PIO
+ PIO_SODR
] = device
->TCK_MASK
;
156 pio_base
[device
->TCK_PIO
+ PIO_CODR
] = device
->TCK_MASK
;
159 pio_base
[device
->TMS_PIO
+ PIO_SODR
] = device
->TMS_MASK
;
161 pio_base
[device
->TMS_PIO
+ PIO_CODR
] = device
->TMS_MASK
;
164 pio_base
[device
->TDI_PIO
+ PIO_SODR
] = device
->TDI_MASK
;
166 pio_base
[device
->TDI_PIO
+ PIO_CODR
] = device
->TDI_MASK
;
169 /* (1) assert or (0) deassert reset lines */
170 static void at91rm9200_reset(int trst
, int srst
)
173 pio_base
[device
->TRST_PIO
+ PIO_SODR
] = device
->TRST_MASK
;
175 pio_base
[device
->TRST_PIO
+ PIO_CODR
] = device
->TRST_MASK
;
178 pio_base
[device
->SRST_PIO
+ PIO_SODR
] = device
->SRST_MASK
;
180 pio_base
[device
->SRST_PIO
+ PIO_CODR
] = device
->SRST_MASK
;
183 static int at91rm9200_speed(int speed
)
189 static int at91rm9200_handle_device_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
194 /* only if the device name wasn't overwritten by cmdline */
195 if (at91rm9200_device
== 0)
197 at91rm9200_device
= malloc(strlen(args
[0]) + sizeof(char));
198 strcpy(at91rm9200_device
, args
[0]);
204 static int at91rm9200_register_commands(struct command_context_s
*cmd_ctx
)
206 register_command(cmd_ctx
, NULL
, "at91rm9200_device", at91rm9200_handle_device_command
,
207 COMMAND_CONFIG
, NULL
);
211 static int at91rm9200_init(void)
213 struct device_t
*cur_device
;
215 cur_device
= devices
;
217 if (at91rm9200_device
== NULL
|| at91rm9200_device
[0] == 0)
219 at91rm9200_device
= "rea_ecr";
220 LOG_WARNING("No at91rm9200 device specified, using default 'rea_ecr'");
223 while (cur_device
->name
)
225 if (strcmp(cur_device
->name
, at91rm9200_device
) == 0)
235 LOG_ERROR("No matching device found for %s", at91rm9200_device
);
236 return ERROR_JTAG_INIT_FAILED
;
239 bitbang_interface
= &at91rm9200_bitbang
;
241 dev_mem_fd
= open("/dev/mem", O_RDWR
| O_SYNC
);
242 if (dev_mem_fd
< 0) {
244 return ERROR_JTAG_INIT_FAILED
;
247 sys_controller
= mmap(NULL
, 4096, PROT_READ
| PROT_WRITE
,
248 MAP_SHARED
, dev_mem_fd
, AT91C_BASE_SYS
);
249 if (sys_controller
== MAP_FAILED
) {
252 return ERROR_JTAG_INIT_FAILED
;
254 pio_base
= (u32
*)sys_controller
+ 0x100;
257 * Configure TDO as an input, and TDI, TCK, TMS, TRST, SRST
258 * as outputs. Drive TDI and TCK low, and TMS/TRST/SRST high.
260 pio_base
[device
->TDI_PIO
+ PIO_CODR
] = device
->TDI_MASK
;
261 pio_base
[device
->TDI_PIO
+ PIO_OER
] = device
->TDI_MASK
;
262 pio_base
[device
->TDI_PIO
+ PIO_PER
] = device
->TDI_MASK
;
263 pio_base
[device
->TCK_PIO
+ PIO_CODR
] = device
->TCK_MASK
;
264 pio_base
[device
->TCK_PIO
+ PIO_OER
] = device
->TCK_MASK
;
265 pio_base
[device
->TCK_PIO
+ PIO_PER
] = device
->TCK_MASK
;
266 pio_base
[device
->TMS_PIO
+ PIO_SODR
] = device
->TMS_MASK
;
267 pio_base
[device
->TMS_PIO
+ PIO_OER
] = device
->TMS_MASK
;
268 pio_base
[device
->TMS_PIO
+ PIO_PER
] = device
->TMS_MASK
;
269 pio_base
[device
->TRST_PIO
+ PIO_SODR
] = device
->TRST_MASK
;
270 pio_base
[device
->TRST_PIO
+ PIO_OER
] = device
->TRST_MASK
;
271 pio_base
[device
->TRST_PIO
+ PIO_PER
] = device
->TRST_MASK
;
272 pio_base
[device
->SRST_PIO
+ PIO_SODR
] = device
->SRST_MASK
;
273 pio_base
[device
->SRST_PIO
+ PIO_OER
] = device
->SRST_MASK
;
274 pio_base
[device
->SRST_PIO
+ PIO_PER
] = device
->SRST_MASK
;
275 pio_base
[device
->TDO_PIO
+ PIO_ODR
] = device
->TDO_MASK
;
276 pio_base
[device
->TDO_PIO
+ PIO_PPUER
] = device
->TDO_MASK
;
277 pio_base
[device
->TDO_PIO
+ PIO_PER
] = device
->TDO_MASK
;
282 static int at91rm9200_quit(void)
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