add missing spidev reader driver (missing from last commit)

git-svn-id: https://svn.gnumonks.org/trunk/librfid@2048 e0336214-984f-0b4b-a45f-81c69e1f0ede

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,
+	},
+};
+