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/* Direct spi for RC632 transport layer
* (based on openpcd reader)
*
* (C) 2007 by Frederic RODO <f.rodo@til-technologies.fr>
*
* This reader use the Linux's spidev interface, so it need a least
* kernel 2.6.22
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/spi/spidev.h>
#include <librfid/rfid.h>
#include <librfid/rfid_reader.h>
#include <librfid/rfid_asic.h>
#include <librfid/rfid_asic_rc632.h>
#include <librfid/rfid_reader_spidev.h>
#include <librfid/rfid_layer2.h>
#include <librfid/rfid_protocol.h>
#include "rfid_reader_rc632_common.h"
/* FIXME */
#include "rc632.h"
static int spidev_fd;
struct spi_ioc_transfer xfer[1];
/* 256bytes max FSD/FSC, plus 1 bytes header, plus 10 bytes reserve */
#define SENDBUF_LEN (256+1+10)
#define RECVBUF_LEN SENDBUF_LEN
static char snd_buf[SENDBUF_LEN];
static char rcv_buf[RECVBUF_LEN];
static int spidev_read(unsigned char reg, unsigned char len,
unsigned char *buf)
{
int ret;
if (!len)
return -EINVAL;
snd_buf[0] = (reg<<1) | 0x80;
if (len > 1)
memset(&snd_buf[1], reg<<1 , len-1);
snd_buf[len] = 0;
/* prepare spi buffer */
xfer[0].tx_buf = (__u64) snd_buf;
xfer[0].rx_buf = (__u64) rcv_buf;
xfer[0].len = len + 1;
ret = ioctl(spidev_fd, SPI_IOC_MESSAGE(1), xfer);
if (ret < 0) {
DEBUGPC("ERROR sending command\n");
return ret;
} else if (ret != (len + 1)) {
DEBUGPC("ERROR sending command bad length\n");
return -EINVAL;
}
memcpy(buf, &rcv_buf[1], len);
return len;
}
static int spidev_write(unsigned char reg, unsigned char len,
const unsigned char *buf)
{
int ret;
if (!len)
return -EINVAL;
snd_buf[0] = (reg << 1) & 0x7E;
memcpy(&snd_buf[1], buf, len);
/* prepare spi buffer */
xfer[0].tx_buf = (__u64) snd_buf;
xfer[0].rx_buf = (__u64) NULL;
xfer[0].len = len + 1;
ret = ioctl(spidev_fd, SPI_IOC_MESSAGE(1), xfer);
if (ret < 0) {
DEBUGPC("ERROR sending command\n");
return ret;
}
else if (ret != len+1)
return -EINVAL;
return len;
}
static int spidev_reg_read(struct rfid_asic_transport_handle *rath,
unsigned char reg, unsigned char *value)
{
int ret;
ret = spidev_read(reg, 1, value);
if (ret < 0)
return ret;
DEBUGP("%s reg = 0x%02x, val = 0x%02x\n", __FUNCTION__, reg, *value);
return 1;
}
static int spidev_reg_write(struct rfid_asic_transport_handle *rath,
unsigned char reg, unsigned char value)
{
int ret;
ret = spidev_write(reg, 1, &value);
if (ret < 0)
return ret;
DEBUGP("%s reg = 0x%02x, val = 0x%02x\n", __FUNCTION__, reg, value);
return 1;
}
static int spidev_fifo_read(struct rfid_asic_transport_handle *rath,
unsigned char len, unsigned char *buf)
{
int ret;
ret = spidev_read(2, len, buf);
if (ret < 0)
return ret;
DEBUGP("%s len=%u, val=%s\n", __FUNCTION__, len,
rfid_hexdump(buf, len));
return len;
}
static int spidev_fifo_write(struct rfid_asic_transport_handle *rath,
unsigned char len, const unsigned char *buf,
unsigned char flags)
{
int ret;
ret = spidev_write(2, len, buf);
if (ret < 0)
return ret;
DEBUGP("%s len=%u, data=%s\n", __FUNCTION__, len,
rfid_hexdump(buf, len));
return len;
}
struct rfid_asic_transport spidev_spi = {
.name = "spidev",
.priv.rc632 = {
.fn = {
.reg_write = &spidev_reg_write,
.reg_read = &spidev_reg_read,
.fifo_write = &spidev_fifo_write,
.fifo_read = &spidev_fifo_read,
},
},
};
static struct rfid_reader_handle *spidev_open(void *data)
{
struct rfid_reader_handle *rh;
struct rfid_asic_transport_handle *rath;
__u32 tmp;
/* open spi device */
if (!data) {
DEBUGP("No device name\n");
return NULL;
}
if ((spidev_fd = open(data, O_RDWR)) < 0) {
DEBUGP("Unable to open:\n");
return NULL;
}
rh = malloc(sizeof(*rh));
if (!rh)
goto out_close_spi;
memset(rh, 0, sizeof(*rh));
rath = malloc(sizeof(*rath));
if (!rath)
goto out_rh;
memset(rath, 0, sizeof(*rath));
rath->rat = &spidev_spi;
rh->reader = &rfid_reader_spidev;
/* Configure spi device, MODE 0 */
tmp = SPI_MODE_0;
if (ioctl(spidev_fd, SPI_IOC_WR_MODE, &tmp) < 0)
goto out_rath;
/* MSB First */
tmp = 0;
if (ioctl(spidev_fd, SPI_IOC_WR_LSB_FIRST, &tmp) < 0)
goto out_rath;
/* 8 bits per word */
tmp = 8;
if (ioctl(spidev_fd, SPI_IOC_WR_BITS_PER_WORD, &tmp) < 0)
goto out_rath;
/* 1 MHz */
tmp = 1e6;
if (ioctl(spidev_fd, SPI_IOC_WR_MAX_SPEED_HZ, &tmp) < 0)
goto out_rath;
/* turn on rc632 */
rh->ah = rc632_open(rath);
if (!rh->ah)
goto out_rath;
/* everything is ok, returning reader handler */
return rh;
out_rath:
free(rath);
out_rh:
free(rh);
out_close_spi:
close(spidev_fd);
return NULL;
}
static void spidev_close(struct rfid_reader_handle *rh)
{
struct rfid_asic_transport_handle *rath = rh->ah->rath;
if (rh->ah)
rc632_close(rh->ah);
if (spidev_fd > 0)
close(spidev_fd);
if (rath)
free(rath);
if (rh)
free(rh);
}
struct rfid_reader rfid_reader_spidev = {
.name = "spidev reader",
.id = RFID_READER_SPIDEV,
.open = &spidev_open,
.close = &spidev_close,
.l2_supported = (1 << RFID_LAYER2_ISO14443A) |
(1 << RFID_LAYER2_ISO14443B) |
(1 << RFID_LAYER2_ISO15693),
.proto_supported = (1 << RFID_PROTOCOL_TCL) |
(1 << RFID_PROTOCOL_MIFARE_UL) |
(1 << RFID_PROTOCOL_MIFARE_CLASSIC),
.getopt = &_rdr_rc632_getopt,
.setopt = &_rdr_rc632_setopt,
.init = &_rdr_rc632_l2_init,
.transceive = &_rdr_rc632_transceive,
.iso14443a = {
.transceive_sf = &_rdr_rc632_transceive_sf,
.transceive_acf = &_rdr_rc632_transceive_acf,
.speed = RFID_14443A_SPEED_106K |
RFID_14443A_SPEED_212K |
RFID_14443A_SPEED_424K,
.set_speed = &_rdr_rc632_14443a_set_speed,
},
.iso15693 = {
.transceive_ac = &_rdr_rc632_iso15693_transceive_ac,
},
.mifare_classic = {
.setkey = &_rdr_rc632_mifare_setkey,
.auth = &_rdr_rc632_mifare_auth,
},
};
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