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/* (C) 2011-2012 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <uart_cmd.h>
#include <reg_field.h>
uint32_t reg_field_read(struct reg_field_ops *ops, struct reg_field *field)
{
uint32_t rc = ops->read_cb(ops->data, field->reg);
return (rc >> field->shift) & ((1 << field->width)-1);
}
int reg_field_write(struct reg_field_ops *ops, struct reg_field *field, uint32_t val)
{
uint32_t old = ops->read_cb(ops->data, field->reg);
uint32_t mask, newreg;
mask = ((1 << field->width)-1) << field->shift;
newreg = (old & ~mask) | ((val << field->shift) & mask);
return ops->write_cb(ops->data, field->reg, newreg);
}
int reg_field_cmd(struct cmd_state *cs, enum cmd_op op,
const char *cmd, int argc, char **argv,
struct reg_field_ops *ops)
{
uint32_t tmp;
int i;
for (i = 0; i < ops->num_fields; i++) {
if (strcmp(ops->field_names[i], cmd))
continue;
switch (op) {
case CMD_OP_SET:
if (argc < 1)
return -EINVAL;
reg_field_write(ops, &ops->fields[i], atoi(argv[0]));
return 0;
break;
case CMD_OP_GET:
tmp = reg_field_read(ops, &ops->fields[i]);
uart_cmd_out(cs, "%s:%u\n\r", cmd, tmp);
return 0;
break;
default:
return -EINVAL;
break;
}
}
return -EINVAL;
}
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