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-rw-r--r--src/rfid_reader_spidev.c389
1 files changed, 389 insertions, 0 deletions
diff --git a/src/rfid_reader_spidev.c b/src/rfid_reader_spidev.c
new file mode 100644
index 0000000..e546380
--- /dev/null
+++ b/src/rfid_reader_spidev.c
@@ -0,0 +1,389 @@
+/* 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>
+
+/* 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 int spidev_transceive(struct rfid_reader_handle *rh,
+ enum rfid_frametype frametype,
+ const unsigned char *tx_data,
+ unsigned int tx_len, unsigned char *rx_data,
+ unsigned int *rx_len, u_int64_t timeout,
+ unsigned int flags)
+{
+ return rh->ah->asic->priv.rc632.fn.transceive(rh->ah, frametype,
+ tx_data, tx_len, rx_data,
+ rx_len, timeout, flags);
+}
+
+static int spidev_transceive_sf(struct rfid_reader_handle *rh,
+ unsigned char cmd,
+ struct iso14443a_atqa *atqa)
+{
+ return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_sf(rh->ah, cmd,
+ atqa);
+}
+
+static int
+spidev_transceive_acf(struct rfid_reader_handle *rh,
+ struct iso14443a_anticol_cmd *cmd,
+ unsigned int *bit_of_col)
+{
+ return rh->ah->asic->priv.rc632.fn.iso14443a.transceive_acf(rh->ah,
+ cmd,
+ bit_of_col);
+}
+
+static int spidev_14443a_init(struct rfid_reader_handle *rh)
+{
+ int ret;
+ ret = rh->ah->asic->priv.rc632.fn.iso14443a.init(rh->ah);
+ return ret;
+}
+
+static int
+spidev_14443a_set_speed(struct rfid_reader_handle *rh,
+ unsigned int tx, unsigned int speed)
+{
+ u_int8_t rate;
+
+ DEBUGP("setting rate: ");
+ switch (speed) {
+ case RFID_14443A_SPEED_106K:
+ rate = 0x00;
+ DEBUGPC("106K\n");
+ break;
+ case RFID_14443A_SPEED_212K:
+ rate = 0x01;
+ DEBUGPC("212K\n");
+ break;
+ case RFID_14443A_SPEED_424K:
+ rate = 0x02;
+ DEBUGPC("424K\n");
+ break;
+ case RFID_14443A_SPEED_848K:
+ rate = 0x03;
+ DEBUGPC("848K\n");
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ return rh->ah->asic->priv.rc632.fn.iso14443a.set_speed(rh->ah,
+ tx, rate);
+}
+
+static int spidev_14443b_init(struct rfid_reader_handle *rh)
+{
+ return rh->ah->asic->priv.rc632.fn.iso14443b.init(rh->ah);
+}
+
+static int spidev_15693_init(struct rfid_reader_handle *rh)
+{
+ return rh->ah->asic->priv.rc632.fn.iso15693.init(rh->ah);
+}
+
+static int
+spidev_mifare_setkey(struct rfid_reader_handle *rh, const u_int8_t * key)
+{
+ return rh->ah->asic->priv.rc632.fn.mifare_classic.setkey(rh->ah, key);
+}
+
+static int
+spidev_mifare_auth(struct rfid_reader_handle *rh, u_int8_t cmd,
+ u_int32_t serno, u_int8_t block)
+{
+ return rh->ah->asic->priv.rc632.fn.mifare_classic.auth(rh->ah,
+ cmd, serno,
+ block);
+}
+
+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,
+ .transceive = &spidev_transceive,
+ .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),
+ .iso14443a = {
+ .init = &spidev_14443a_init,
+ .transceive_sf = &spidev_transceive_sf,
+ .transceive_acf = &spidev_transceive_acf,
+ .speed = RFID_14443A_SPEED_106K
+ | RFID_14443A_SPEED_212K | RFID_14443A_SPEED_424K,
+ .set_speed = &spidev_14443a_set_speed,
+ },
+ .iso14443b = {
+ .init = &spidev_14443b_init,
+ },
+ .mifare_classic = {
+ .setkey = &spidev_mifare_setkey,
+ .auth = &spidev_mifare_auth,
+ },
+};
+
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