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/* Generic Philips CL RC632 Routines
* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
*
* 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
*
*/
#ifdef DEBUG
#undef DEBUG
#endif
#include <sys/types.h>
#include <string.h>
#include <errno.h>
#include <cl_rc632.h>
#include "rc632.h"
#include <os/dbgu.h>
#include <librfid/rfid_layer2_iso14443a.h>
#include <librfid/rfid_protocol_mifare_classic.h>
/* initially we use the same values as cm5121 */
#define OPENPCD_CW_CONDUCTANCE 0x3f
#define OPENPCD_MOD_CONDUCTANCE 0x3f
#define OPENPCD_14443A_BITPHASE 0xa9
#define OPENPCD_14443A_THRESHOLD 0xff
#define OPENPCD_14443B_BITPHASE 0xad
#define OPENPCD_14443B_THRESHOLD 0xff
#define RC632_TMO_AUTH1 14000
#define RC632_TIMEOUT_FUZZ_FACTOR 10
#define USE_IRQ
#define ENTER() DEBUGPCRF("entering")
struct rfid_asic rc632;
static int
rc632_set_bit_mask(struct rfid_asic_handle *handle,
uint8_t reg, uint8_t mask, uint8_t val)
{
int ret;
uint8_t tmp;
ret = opcd_rc632_reg_read(handle, reg, &tmp);
if (ret < 0)
return ret;
/* if bits are already like we want them, abort */
if ((tmp & mask) == val)
return 0;
return opcd_rc632_reg_write(handle, reg, (tmp & ~mask)|(val & mask));
}
int
rc632_turn_on_rf(struct rfid_asic_handle *handle)
{
ENTER();
return opcd_rc632_set_bits(handle, RC632_REG_TX_CONTROL, 0x03);
}
int
rc632_turn_off_rf(struct rfid_asic_handle *handle)
{
ENTER();
return opcd_rc632_clear_bits(handle, RC632_REG_TX_CONTROL, 0x03);
}
static int
rc632_power_up(struct rfid_asic_handle *handle)
{
ENTER();
return opcd_rc632_clear_bits(handle, RC632_REG_CONTROL,
RC632_CONTROL_POWERDOWN);
}
static int
rc632_power_down(struct rfid_asic_handle *handle)
{
return opcd_rc632_set_bits(handle, RC632_REG_CONTROL,
RC632_CONTROL_POWERDOWN);
}
#define MAX_WRITE_LEN 16 /* see Sec. 18.6.1.2 of RC632 Spec Rev. 3.2. */
int
rc632_write_eeprom(struct rfid_asic_handle *handle,
uint16_t addr, uint8_t len, uint8_t *data)
{
uint8_t sndbuf[MAX_WRITE_LEN + 2];
uint8_t reg;
int ret;
if (len > MAX_WRITE_LEN)
return -EINVAL;
if (addr < 0x10)
return -EPERM;
if (addr > 0x1ff)
return -EINVAL;
sndbuf[0] = addr & 0x00ff; /* LSB */
sndbuf[1] = addr >> 8; /* MSB */
memcpy(&sndbuf[2], data, len);
ret = opcd_rc632_fifo_write(handle, len + 2, sndbuf, 0x03);
if (ret < 0)
return ret;
ret = opcd_rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_WRITE_E2);
if (ret < 0)
return ret;
ret = opcd_rc632_reg_read(handle, RC632_REG_ERROR_FLAG, ®);
if (ret < 0)
return ret;
if (reg & RC632_ERR_FLAG_ACCESS_ERR)
return -EPERM;
while (1) {
ret = opcd_rc632_reg_read(handle, RC632_REG_SECONDARY_STATUS, ®);
if (ret < 0)
return ret;
if (reg & RC632_SEC_ST_E2_READY) {
/* the E2Write command must be terminated, See sec. 18.6.1.3 */
ret = opcd_rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_IDLE);
break;
}
}
return ret;
}
int
rc632_read_eeprom(struct rfid_asic_handle *handle, uint16_t addr, uint8_t len,
uint8_t *recvbuf)
{
uint8_t sndbuf[3];
uint8_t err;
int ret;
sndbuf[0] = (addr & 0xff);
sndbuf[1] = addr >> 8;
sndbuf[2] = len;
ret = opcd_rc632_fifo_write(handle, 3, sndbuf, 0x03);
if (ret < 0)
return ret;
ret = opcd_rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_READ_E2);
if (ret < 0)
return ret;
/* usleep(20000); */
ret = opcd_rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &err);
if (err & RC632_ERR_FLAG_ACCESS_ERR)
return -EPERM;
ret = opcd_rc632_reg_read(handle, RC632_REG_FIFO_LENGTH, &err);
if (err < len)
len = err;
ret = opcd_rc632_fifo_read(handle, len, recvbuf);
if (ret < 0)
return ret;
return len;
}
#define RC632_E2_PRODUCT_TYPE 0
#define RC632_E2_PRODUCT_SERIAL 8
#define RC632_E2_RS_MAX_P 14
int rc632_get_serial(struct rfid_asic_handle *handle,
uint32_t *serial)
{
return rc632_read_eeprom(handle, RC632_E2_PRODUCT_SERIAL,
4, (uint8_t *)serial);
}
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