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/* (C) 2011-2012 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <errno.h>
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#include <string.h>
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#include <uart_cmd.h>
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#include <reg_field.h>
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uint32_t reg_field_read(struct reg_field_ops *ops, struct reg_field *field)
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{
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uint32_t rc = ops->read_cb(ops->data, field->reg);
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return (rc >> field->shift) & ((1 << field->width)-1);
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}
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int reg_field_write(struct reg_field_ops *ops, struct reg_field *field, uint32_t val)
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{
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uint32_t old = ops->read_cb(ops->data, field->reg);
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uint32_t mask, newreg;
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mask = ((1 << field->width)-1) << field->shift;
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newreg = (old & ~mask) | ((val << field->shift) & mask);
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return ops->write_cb(ops->data, field->reg, newreg);
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}
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int reg_field_cmd(struct cmd_state *cs, enum cmd_op op,
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const char *cmd, int argc, char **argv,
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struct reg_field_ops *ops)
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{
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uint32_t tmp;
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int i;
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for (i = 0; i < ops->num_fields; i++) {
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if (strcmp(ops->field_names[i], cmd))
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continue;
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switch (op) {
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case CMD_OP_SET:
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if (argc < 1)
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return -EINVAL;
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reg_field_write(ops, &ops->fields[i], atoi(argv[0]));
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return 0;
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break;
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case CMD_OP_GET:
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tmp = reg_field_read(ops, &ops->fields[i]);
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uart_cmd_out(cs, "%s:%u\n\r", cmd, tmp);
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return 0;
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break;
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default:
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return -EINVAL;
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break;
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}
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}
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return -EINVAL;
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}
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