move to new directory

git-svn-id: https://svn.openpcd.org:2342/trunk@191 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

1 files changed, 1473 insertions, 0 deletions

diff --git a/firmware/src/pcd/rc632_highlevel.c b/firmware/src/pcd/rc632_highlevel.c
new file mode 100644
index 0000000..b1186ab
--- /dev/null
+++ b/firmware/src/pcd/rc632_highlevel.c
@@ -0,0 +1,1473 @@
+/* Generic Philips CL RC632 Routines
+ *
+ * (C) Harald Welte <laforge@gnumonks.org>
+ *
+ */
+
+/*
+ *  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 <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, 
+		   u_int8_t reg, u_int8_t mask, u_int8_t val)
+{
+	int ret;
+	u_int8_t tmp;
+
+	ret = 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 rc632_reg_write(handle, reg, (tmp & ~mask)|(val & mask));
+}
+
+int 
+rc632_turn_on_rf(struct rfid_asic_handle *handle)
+{
+	ENTER();
+	return rc632_set_bits(handle, RC632_REG_TX_CONTROL, 0x03);
+}
+
+int 
+rc632_turn_off_rf(struct rfid_asic_handle *handle)
+{
+	ENTER();
+	return rc632_clear_bits(handle, RC632_REG_TX_CONTROL, 0x03);
+}
+
+static int
+rc632_power_up(struct rfid_asic_handle *handle)
+{
+	ENTER();
+	return rc632_clear_bits(handle, RC632_REG_CONTROL, 
+				RC632_CONTROL_POWERDOWN);
+}
+
+static int
+rc632_power_down(struct rfid_asic_handle *handle)
+{
+	return rc632_set_bits(handle, RC632_REG_CONTROL,
+			      RC632_CONTROL_POWERDOWN);
+}
+
+/* calculate best 8bit prescaler and divisor for given usec timeout */
+static int best_prescaler(u_int64_t timeout, u_int8_t *prescaler,
+			  u_int8_t *divisor)
+{
+	u_int8_t best_presc, best_divisor, i;
+	int64_t smallest_diff;
+
+	smallest_diff = 0x7fffffffffffffff;
+	best_presc = 0;
+
+	for (i = 0; i < 21; i++) {
+		u_int64_t clk, tmp_div, res;
+		int64_t diff;
+		clk = 13560000 / (1 << i);
+		tmp_div = (clk * timeout) / 1000000;
+		tmp_div++;
+
+		if (tmp_div > 0xff)
+			continue;
+
+		res = 1000000 / (clk / tmp_div);
+		diff = res - timeout;
+
+		if (diff < 0)
+			continue;
+
+		if (diff < smallest_diff) {
+			best_presc = i;
+			best_divisor = tmp_div;
+			smallest_diff = diff;
+		}
+	}
+
+	*prescaler = best_presc;
+	*divisor = best_divisor;
+
+	DEBUGPCRF("timeout %u usec, prescaler = %u, divisor = %u", timeout, best_presc, best_divisor);
+
+	return 0;
+}
+
+static int
+rc632_timer_set(struct rfid_asic_handle *handle,
+		u_int64_t timeout)
+{
+	int ret;
+	u_int8_t prescaler, divisor;
+
+	ret = best_prescaler(timeout*RC632_TIMEOUT_FUZZ_FACTOR, 
+			     &prescaler, &divisor);
+
+	ret = rc632_reg_write(handle, RC632_REG_TIMER_CLOCK,
+			      prescaler & 0x1f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_TIMER_CONTROL,
+			      RC632_TMR_START_TX_END|RC632_TMR_STOP_RX_BEGIN);
+
+	/* clear timer irq bit */
+	ret |= rc632_set_bits(handle, RC632_REG_INTERRUPT_RQ, RC632_INT_TIMER);
+
+#ifdef USE_IRQ_
+	/* enable interrupt for expired timer */
+	ret |= rc632_reg_write(handle, RC632_REG_INTERRUPT_EN,
+			       RC632_INT_TIMER|RC632_INT_SET);
+#endif
+
+	ret |= rc632_reg_write(handle, RC632_REG_TIMER_RELOAD, divisor);
+
+	return ret;
+}
+
+/* Wait until RC632 is idle or TIMER IRQ has happened */
+static int rc632_wait_idle_timer(struct rfid_asic_handle *handle)
+{
+	int ret;
+	u_int8_t irq, cmd;
+
+	while (1) {
+		ret = rc632_reg_read(handle, RC632_REG_INTERRUPT_RQ, &irq);
+		if (ret < 0)
+			return ret;
+
+		/* FIXME: currently we're lazy:  If we actually received
+		 * something even after the timer expired, we accept it */
+		if (irq & RC632_INT_TIMER && !(irq & RC632_INT_RX)) {
+			u_int8_t foo;
+			rc632_reg_read(handle, RC632_REG_PRIMARY_STATUS, &foo);
+			DEBUGPCRF("TIMER && !INT_RX, PRIM_STATUS=0x%02x", foo);
+			if (foo & 0x04) {
+				rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &foo);
+				DEBUGPCRF("ERROR_FLAG=0x%02x, returning timeout", foo);
+			}
+
+			return -ETIMEDOUT;
+		}
+
+		ret = rc632_reg_read(handle, RC632_REG_COMMAND, &cmd);
+		if (ret < 0)
+			return ret;
+
+		if (cmd == 0 || irq & RC632_INT_RX)
+			return 0;
+
+		/* poll every millisecond */
+		/* FIXME usleep(1000);*/
+	}
+}
+
+/* Stupid RC632 implementations don't evaluate interrupts but poll the
+ * command register for "status idle" */
+static int
+rc632_wait_idle(struct rfid_asic_handle *handle, u_int64_t timeout)
+{
+	u_int8_t cmd = 0xff;
+	int ret, cycles = 0;
+#define USLEEP_PER_CYCLE	128
+
+	while (cmd != 0) {
+		ret = rc632_reg_read(handle, RC632_REG_COMMAND, &cmd);
+		if (ret < 0)
+			return ret;
+
+		if (cmd == 0) {
+			/* FIXME: read second time ?? */
+			return 0;
+		}
+
+		{
+			u_int8_t foo;
+			rc632_reg_read(handle, RC632_REG_PRIMARY_STATUS, &foo);
+			if (foo & 0x04)
+				rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &foo);
+		}
+
+		/* Abort after some timeout */
+		if (cycles > timeout*RC632_TIMEOUT_FUZZ_FACTOR/USLEEP_PER_CYCLE) {
+			return -ETIMEDOUT;
+		}
+
+		cycles++;
+		usleep(USLEEP_PER_CYCLE);
+	}
+
+	return 0;
+}
+
+static int
+rc632_transmit(struct rfid_asic_handle *handle,
+		const u_int8_t *buf,
+		u_int8_t len,
+		u_int64_t timeout)
+{
+	int ret, cur_len;
+	const u_int8_t *cur_buf = buf;
+
+	if (len > 64)
+		cur_len = 64;
+	else
+		cur_len = len;
+	
+	do {
+		ret = rc632_fifo_write(handle, cur_len, cur_buf, 0x03);
+		if (ret < 0)
+			return ret;
+
+		if (cur_buf == buf)  {
+			/* only start transmit first time */
+			ret = rc632_reg_write(handle, RC632_REG_COMMAND,
+					      RC632_CMD_TRANSMIT);
+			if (ret < 0)
+				return ret;
+		}
+
+		cur_buf += cur_len;
+		if (cur_buf < buf + len) {
+			cur_len = buf - cur_buf;
+			if (cur_len > 64)
+				cur_len = 64;
+		} else
+			cur_len = 0;
+
+	} while (cur_len);
+
+	return rc632_wait_idle(handle, timeout);
+}
+
+static int
+tcl_toggle_pcb(struct rfid_asic_handle *handle)
+{
+	// FIXME: toggle something between 0x0a and 0x0b
+	return 0;
+}
+
+static int
+rc632_transceive(struct rfid_asic_handle *handle,
+		 const u_int8_t *tx_buf,
+		 u_int8_t tx_len,
+		 u_int8_t *rx_buf,
+		 u_int8_t *rx_len,
+		 u_int64_t timer,
+		 unsigned int toggle)
+{
+	int ret, cur_tx_len;
+	const u_int8_t *cur_tx_buf = tx_buf;
+
+	DEBUGPCRF("tx_len=%u, rx_len=%u, timer=%llu", tx_len, *rx_len, timer);
+
+	if (tx_len > 64)
+		cur_tx_len = 64;
+	else
+		cur_tx_len = tx_len;
+
+	ret = rc632_reg_write(handle, RC632_REG_COMMAND, 0x00);
+	/* clear all interrupts */
+	ret = rc632_reg_write(handle, RC632_REG_INTERRUPT_RQ, 0x7f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_timer_set(handle, timer);
+	if (ret < 0)
+		return ret;
+	
+	do {	
+		ret = rc632_fifo_write(handle, cur_tx_len, cur_tx_buf, 0x03);
+		if (ret < 0)
+			return ret;
+
+		if (cur_tx_buf == tx_buf) {
+			ret = rc632_reg_write(handle, RC632_REG_COMMAND,
+					      RC632_CMD_TRANSCEIVE);
+			if (ret < 0)
+				return ret;
+		}
+
+		cur_tx_buf += cur_tx_len;
+		if (cur_tx_buf < tx_buf + tx_len) {
+			u_int8_t fifo_fill;
+			ret = rc632_reg_read(handle, RC632_REG_FIFO_LENGTH,
+					     &fifo_fill);
+			if (ret < 0)
+				return ret;
+
+			cur_tx_len = 64 - fifo_fill;
+			DEBUGPCRF("refilling tx fifo with %u bytes", cur_tx_len);
+		} else
+			cur_tx_len = 0;
+
+	} while (cur_tx_len);
+
+	if (toggle == 1)
+		tcl_toggle_pcb(handle);
+
+	ret = rc632_wait_idle_timer(handle);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_read(handle, RC632_REG_FIFO_LENGTH, rx_len);
+	if (ret < 0)
+		return ret;
+
+	DEBUGPCRF("rx_len = %u\n", *rx_len);
+
+	if (*rx_len == 0) {
+		u_int8_t tmp, tmp2;
+
+		rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &tmp);
+		rc632_reg_read(handle, RC632_REG_CHANNEL_REDUNDANCY, &tmp2);
+
+		DEBUGPCRF("rx_len == 0, error_flag=0x%02x, channel_red=0x%02x",
+			  tmp, tmp2);
+
+		return -1; 
+	}
+
+	return rc632_fifo_read(handle, *rx_len, rx_buf);
+}
+
+int
+rc632_read_eeprom(struct rfid_asic_handle *handle, u_int16_t addr, u_int8_t len,
+		  u_int8_t *recvbuf)
+{
+	u_int8_t sndbuf[3];
+	u_int8_t err;
+	int ret;
+
+	sndbuf[0] = (addr & 0xff);
+	sndbuf[1] = addr >> 8;
+	sndbuf[2] = len;
+
+	ret = rc632_fifo_write(handle, 3, sndbuf, 0x03);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_READ_E2);
+	if (ret < 0)
+		return ret;
+
+	/* usleep(20000); */
+
+	ret = rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &err);
+	if (err & RC632_ERR_FLAG_ACCESS_ERR)
+		return -EPERM;
+	
+	ret = rc632_reg_read(handle, RC632_REG_FIFO_DATA, &err);
+	if (err < len)
+		len = err;
+
+	ret = rc632_fifo_read(handle, len, recvbuf);
+	if (ret < 0)
+		return ret;
+
+	return len;
+}
+
+static int
+rc632_calc_crc16_from(struct rfid_asic_handle *handle)
+{
+	u_int8_t sndbuf[2] = { 0x01, 0x02 };
+	u_int8_t crc_lsb = 0x00 , crc_msb = 0x00;
+	int ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CRC_PRESET_LSB, 0x12);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CRC_PRESET_MSB, 0xe0);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_fifo_write(handle, sizeof(sndbuf), sndbuf, 3);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_CALC_CRC);
+	if (ret < 0)
+		return ret;
+	
+	usleep(10000);	// FIXME: no checking for cmd completion?
+
+	ret = rc632_reg_read(handle, RC632_REG_CRC_RESULT_LSB, &crc_lsb);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_read(handle, RC632_REG_CRC_RESULT_MSB, &crc_msb);
+	if (ret < 0)
+		return ret;
+
+	// FIXME: what to do with crc result?
+	return ret;
+}
+
+
+int
+rc632_register_dump(struct rfid_asic_handle *handle, u_int8_t *buf)
+{
+	int ret;
+	u_int8_t i;
+
+	for (i = 0; i <= 0x3f; i++) {
+		ret = rc632_reg_read(handle, i, &buf[i]);
+		// do we want error checks?
+	}
+	return 0;
+}
+
+
+#if 0
+static int
+rc632_init(struct rfid_asic_handle *ah)
+{
+	int ret;
+
+	/* switch off rf (make sure PICCs are reset at init time) */
+	ret = rc632_power_down(ah);
+	if (ret < 0)
+		return ret;
+
+	usleep(10000);
+
+	/* switch on rf */
+	ret = rc632_power_up(ah);
+	if (ret < 0)
+		return ret;
+
+	/* disable register paging */
+	ret = rc632_reg_write(ah, 0x00, 0x00);
+	if (ret < 0)
+		return ret;
+
+	/* set some sane default values */
+	ret = rc632_reg_write(ah, 0x11, 0x5b);
+	if (ret < 0)
+		return ret;
+
+	/* switch on rf */
+	ret = rc632_turn_on_rf(ah);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int
+rc632_fini(struct rfid_asic_handle *ah)
+{
+	int ret;
+
+	/* switch off rf */
+	ret = rc632_turn_off_rf(ah);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_power_down(ah);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+#endif
+
+
+/* 
+ * Philips CL RC632 primitives for ISO 14443-A compliant PICC's
+ *
+ * (C) 2005 by Harald Welte <laforge@gnumonks.org>
+ *
+ */
+
+int
+rc632_iso14443a_init(struct rfid_asic_handle *handle)
+{
+	int ret;
+
+	// FIXME: some fifo work (drain fifo?)
+	
+	/* flush fifo (our way) */
+	ret = rc632_reg_write(handle, RC632_REG_CONTROL, 0x01);
+
+	ret = rc632_reg_write(handle, RC632_REG_TX_CONTROL,
+			(RC632_TXCTRL_TX1_RF_EN |
+			 RC632_TXCTRL_TX2_RF_EN |
+			 RC632_TXCTRL_TX2_INV |
+			 RC632_TXCTRL_FORCE_100_ASK |
+			 RC632_TXCTRL_MOD_SRC_INT));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CW_CONDUCTANCE,
+				OPENPCD_CW_CONDUCTANCE);
+	if (ret < 0)
+		return ret;
+
+	/* Since FORCE_100_ASK is set (cf mc073930.pdf), this line may be left out? */
+	ret = rc632_reg_write(handle, RC632_REG_MOD_CONDUCTANCE,
+				OPENPCD_MOD_CONDUCTANCE);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CODER_CONTROL,
+				(RC632_CDRCTRL_TXCD_14443A |
+				 RC632_CDRCTRL_RATE_106K));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_MOD_WIDTH, 0x13);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_MOD_WIDTH_SOF, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_TYPE_B_FRAMING, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_RX_CONTROL1,
+			      (RC632_RXCTRL1_GAIN_35DB |
+			       RC632_RXCTRL1_ISO14443 |
+			       RC632_RXCTRL1_SUBCP_8));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_DECODER_CONTROL,
+			      (RC632_DECCTRL_MANCHESTER |
+			       RC632_DECCTRL_RXFR_14443A));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_BIT_PHASE,
+				OPENPCD_14443A_BITPHASE);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_RX_THRESHOLD,
+				OPENPCD_14443A_THRESHOLD);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_BPSK_DEM_CONTROL, 0x00);
+	if (ret < 0)
+		return ret;
+			      
+	ret = rc632_reg_write(handle, RC632_REG_RX_CONTROL2,
+			      (RC632_RXCTRL2_DECSRC_INT |
+			       RC632_RXCTRL2_CLK_Q));
+	if (ret < 0)
+		return ret;
+
+	/* Omnikey proprietary driver has 0x03, but 0x06 is the default reset value ?!? */
+	ret = rc632_reg_write(handle, RC632_REG_RX_WAIT, 0x06);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CHANNEL_REDUNDANCY,
+			      (RC632_CR_PARITY_ENABLE |
+			       RC632_CR_PARITY_ODD));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CRC_PRESET_LSB, 0x63);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CRC_PRESET_MSB, 0x63);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int
+rc632_iso14443a_fini(struct iso14443a_handle *handle_14443)
+{
+
+#if 0
+	ret = rc632_turn_off_rf(handle);
+	if (ret < 0)
+		return ret;
+#endif
+
+
+	return 0;
+}
+
+
+/* issue a 14443-3 A PCD -> PICC command in a short frame, such as REQA, WUPA */
+int
+rc632_iso14443a_transceive_sf(struct rfid_asic_handle *handle,
+				u_int8_t cmd,
+		    		struct iso14443a_atqa *atqa)
+{
+	int ret;
+	u_int8_t tx_buf[1];
+	u_int8_t rx_len = 2;
+
+	DEBUGPCRF("");
+	memset(atqa, 0, sizeof(atqa));
+
+	tx_buf[0] = cmd;
+
+	/* transfer only 7 bits of last byte in frame */
+	ret = rc632_reg_write(handle, RC632_REG_BIT_FRAMING, 0x07);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_clear_bits(handle, RC632_REG_CONTROL,
+				RC632_CONTROL_CRYPTO1_ON);
+	if (ret < 0)
+		return ret;
+
+#if 0
+	ret = rc632_reg_write(handle, RC632_REG_CHANNEL_REDUNDANCY,
+				(RC632_CR_PARITY_ENABLE |
+				 RC632_CR_PARITY_ODD));
+#else
+	ret = rc632_clear_bits(handle, RC632_REG_CHANNEL_REDUNDANCY,
+				RC632_CR_RX_CRC_ENABLE|RC632_CR_TX_CRC_ENABLE);
+				
+#endif
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_transceive(handle, tx_buf, sizeof(tx_buf),
+				(u_int8_t *)atqa, &rx_len,
+				ISO14443A_FDT_ANTICOL_LAST1, 0);
+	if (ret < 0) {
+		DEBUGPCRF("error during rc632_transceive()");
+		return ret;
+	}
+
+	/* switch back to normal 8bit last byte */
+	ret = rc632_reg_write(handle, RC632_REG_BIT_FRAMING, 0x00);
+	if (ret < 0)
+		return ret;
+
+	if (rx_len != 2) {
+		DEBUGPCRF("rx_len(%d) != 2", rx_len);
+		return -1;
+	}
+
+	return 0;
+}
+
+/* transceive regular frame */
+int
+rc632_iso14443ab_transceive(struct rfid_asic_handle *handle,
+			   unsigned int frametype,
+			   const u_int8_t *tx_buf, unsigned int tx_len,
+			   u_int8_t *rx_buf, unsigned int *rx_len,
+			   u_int64_t timeout, unsigned int flags)
+{
+	int ret;
+	u_int8_t rxl = *rx_len & 0xff;
+	u_int8_t channel_red;
+
+	DEBUGPCRF("tx_len=%u, rx_len=%u", tx_len, *rx_len);
+
+	memset(rx_buf, 0, *rx_len);
+
+	switch (frametype) {
+	case RFID_14443A_FRAME_REGULAR:
+	case RFID_MIFARE_FRAME:
+		channel_red = RC632_CR_RX_CRC_ENABLE|RC632_CR_TX_CRC_ENABLE
+				|RC632_CR_PARITY_ENABLE|RC632_CR_PARITY_ODD;
+		break;
+	case RFID_14443B_FRAME_REGULAR:
+		channel_red = RC632_CR_RX_CRC_ENABLE|RC632_CR_TX_CRC_ENABLE
+				|RC632_CR_CRC3309;
+		break;
+#if 0
+	case RFID_MIFARE_FRAME:
+		channel_red = RC632_CR_PARITY_ENABLE|RC632_CR_PARITY_ODD;
+		break;
+#endif
+	default:
+		return -EINVAL;
+		break;
+	}
+	ret = rc632_reg_write(handle, RC632_REG_CHANNEL_REDUNDANCY,
+			      channel_red);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_transceive(handle, tx_buf, tx_len, rx_buf, &rxl, timeout, 0);
+	*rx_len = rxl;
+	if (ret < 0)
+		return ret;
+
+
+	return 0; 
+}
+
+/* transceive anti collission bitframe */
+int
+rc632_iso14443a_transceive_acf(struct rfid_asic_handle *handle,
+				struct iso14443a_anticol_cmd *acf,
+				unsigned int *bit_of_col)
+{
+	int ret;
+	u_int8_t rx_buf[64];
+	u_int8_t rx_len = sizeof(rx_buf);
+	u_int8_t rx_align = 0, tx_last_bits, tx_bytes;
+	u_int8_t boc;
+	u_int8_t error_flag;
+	*bit_of_col = ISO14443A_BITOFCOL_NONE;
+	memset(rx_buf, 0, sizeof(rx_buf));
+
+	/* disable mifare cryto */
+	ret = rc632_clear_bits(handle, RC632_REG_CONTROL,
+				RC632_CONTROL_CRYPTO1_ON);
+	if (ret < 0)
+		return ret;
+
+	/* disable CRC summing */
+#if 0
+	ret = rc632_reg_write(handle, RC632_REG_CHANNEL_REDUNDANCY,
+				(RC632_CR_PARITY_ENABLE |
+				 RC632_CR_PARITY_ODD));
+#else
+	ret = rc632_clear_bits(handle, RC632_REG_CHANNEL_REDUNDANCY,
+				RC632_CR_TX_CRC_ENABLE|RC632_CR_TX_CRC_ENABLE);
+#endif
+	if (ret < 0)
+		return ret;
+
+	tx_last_bits = acf->nvb & 0x0f;	/* lower nibble indicates bits */
+	tx_bytes = acf->nvb >> 4;
+	if (tx_last_bits) {
+		tx_bytes++;
+		rx_align = (tx_last_bits+1) % 8;/* rx frame complements tx */
+	}
+
+	//rx_align = 8 - tx_last_bits;/* rx frame complements tx */
+
+	/* set RxAlign and TxLastBits*/
+	ret = rc632_reg_write(handle, RC632_REG_BIT_FRAMING,
+				(rx_align << 4) | (tx_last_bits));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_transceive(handle, (u_int8_t *)acf, tx_bytes,
+				rx_buf, &rx_len, 0x32, 0);
+	if (ret < 0)
+		return ret;
+
+	/* bitwise-OR the two halves of the split byte */
+	acf->uid_bits[tx_bytes-2] = (
+		  (acf->uid_bits[tx_bytes-2] & (0xff >> (8-tx_last_bits)))
+		| rx_buf[0]);
+	/* copy the rest */
+	memcpy(&acf->uid_bits[tx_bytes+1-2], &rx_buf[1], rx_len-1);
+
+	/* determine whether there was a collission */
+	ret = rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &error_flag);
+	if (ret < 0)
+		return ret;
+
+	if (error_flag & RC632_ERR_FLAG_COL_ERR) {
+		/* retrieve bit of collission */
+		ret = rc632_reg_read(handle, RC632_REG_COLL_POS, &boc);
+		if (ret < 0)
+			return ret;
+
+		/* bit of collission relative to start of part 1 of 
+		 * anticollision frame (!) */
+		*bit_of_col = 2*8 + boc;
+	}
+
+	return 0;
+}
+
+enum rc632_rate {
+	RC632_RATE_106	= 0x00,
+	RC632_RATE_212	= 0x01,
+	RC632_RATE_424	= 0x02,
+	RC632_RATE_848	= 0x03,
+};
+
+struct rx_config {
+	u_int8_t	subc_pulses;
+	u_int8_t	rx_coding;
+	u_int8_t	rx_threshold;
+	u_int8_t	bpsk_dem_ctrl;
+};
+
+struct tx_config {
+	u_int8_t	rate;
+	u_int8_t	mod_width;
+};
+
+static const struct rx_config rx_configs[] = {
+	{
+		.subc_pulses 	= RC632_RXCTRL1_SUBCP_8,
+		.rx_coding	= RC632_DECCTRL_MANCHESTER,
+		.rx_threshold	= 0x88,
+		.bpsk_dem_ctrl	= 0x00,
+	},
+	{
+		.subc_pulses	= RC632_RXCTRL1_SUBCP_4,
+		.rx_coding	= RC632_DECCTRL_BPSK,
+		.rx_threshold	= 0x50,
+		.bpsk_dem_ctrl	= 0x0c,
+	},
+	{
+		.subc_pulses	= RC632_RXCTRL1_SUBCP_2,
+		.rx_coding	= RC632_DECCTRL_BPSK,
+		.rx_threshold	= 0x50,
+		.bpsk_dem_ctrl	= 0x0c,
+	},
+	{
+		.subc_pulses	= RC632_RXCTRL1_SUBCP_1,
+		.rx_coding	= RC632_DECCTRL_BPSK,
+		.rx_threshold	= 0x50,
+		.bpsk_dem_ctrl	= 0x0c,
+	},
+};
+
+static const struct tx_config tx_configs[] = {
+	{
+		.rate 		= RC632_CDRCTRL_RATE_106K,
+		.mod_width	= 0x13,
+	},
+	{
+		.rate		= RC632_CDRCTRL_RATE_212K,
+		.mod_width	= 0x07,
+	},
+	{
+		.rate		= RC632_CDRCTRL_RATE_424K,
+		.mod_width	= 0x03,
+	},
+	{
+		.rate		= RC632_CDRCTRL_RATE_848K,
+		.mod_width	= 0x01,
+	},
+};
+
+int rc632_iso14443a_set_speed(struct rfid_asic_handle *handle,
+			     unsigned int tx,
+			     u_int8_t rate)
+{
+	int rc;
+	u_int8_t reg;
+
+
+	if (!tx) {
+		/* Rx */
+		if (rate > ARRAY_SIZE(rx_configs))
+			return -EINVAL;
+
+		rc = rc632_set_bit_mask(handle, RC632_REG_RX_CONTROL1,
+					RC632_RXCTRL1_SUBCP_MASK,
+					rx_configs[rate].subc_pulses);
+		if (rc < 0)
+			return rc;
+
+		rc = rc632_set_bit_mask(handle, RC632_REG_DECODER_CONTROL,
+					RC632_DECCTRL_BPSK,
+					rx_configs[rate].rx_coding);
+		if (rc < 0)
+			return rc;
+
+		rc = rc632_reg_write(handle, RC632_REG_RX_THRESHOLD,
+					rx_configs[rate].rx_threshold);
+		if (rc < 0)
+			return rc;
+
+		if (rx_configs[rate].rx_coding == RC632_DECCTRL_BPSK) {
+			rc = rc632_reg_write(handle, 
+					     RC632_REG_BPSK_DEM_CONTROL,
+					     rx_configs[rate].bpsk_dem_ctrl);
+			if (rc < 0)
+				return rc;
+		}
+	} else {
+		/* Tx */
+		if (rate > ARRAY_SIZE(tx_configs))
+			return -EINVAL;
+
+		rc = rc632_set_bit_mask(handle, RC632_REG_CODER_CONTROL,
+					RC632_CDRCTRL_RATE_MASK,
+					tx_configs[rate].rate);
+		if (rc < 0)
+			return rc;
+
+		rc = rc632_reg_write(handle, RC632_REG_MOD_WIDTH,
+				     tx_configs[rate].mod_width);
+		if (rc < 0)
+			return rc;
+	}
+
+	return 0;
+}
+
+static int rc632_iso14443b_init(struct rfid_asic_handle *handle)
+{
+	int ret;
+
+	// FIXME: some FIFO work
+	
+	/* flush fifo (our way) */
+	ret = rc632_reg_write(handle, RC632_REG_CONTROL, 0x01);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_TX_CONTROL,
+			(RC632_TXCTRL_TX1_RF_EN |
+			 RC632_TXCTRL_TX2_RF_EN |
+			 RC632_TXCTRL_TX2_INV |
+			 RC632_TXCTRL_MOD_SRC_INT));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CW_CONDUCTANCE, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_MOD_CONDUCTANCE, 0x04);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CODER_CONTROL,
+			      (RC632_CDRCTRL_TXCD_NRZ |
+			       RC632_CDRCTRL_RATE_14443B));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_MOD_WIDTH, 0x13);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_MOD_WIDTH_SOF, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_TYPE_B_FRAMING,
+			      (RC632_TBFRAMING_SOF_11L_3H |
+			       (6 << RC632_TBFRAMING_SPACE_SHIFT) |
+			       RC632_TBFRAMING_EOF_11));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_RX_CONTROL1,
+			      (RC632_RXCTRL1_GAIN_35DB |
+			       RC632_RXCTRL1_ISO14443 |
+			       RC632_RXCTRL1_SUBCP_8));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_DECODER_CONTROL,
+			      (RC632_DECCTRL_BPSK |
+			       RC632_DECCTRL_RXFR_14443B));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_BIT_PHASE,
+				OPENPCD_14443B_BITPHASE);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_RX_THRESHOLD,
+				OPENPCD_14443B_THRESHOLD);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_BPSK_DEM_CONTROL,
+			      ((0x2 & RC632_BPSKD_TAUB_MASK)<<RC632_BPSKD_TAUB_SHIFT |
+			       (0x3 & RC632_BPSKD_TAUD_MASK)<<RC632_BPSKD_TAUD_SHIFT |
+			       RC632_BPSKD_FILTER_AMP_DETECT |
+			       RC632_BPSKD_NO_RX_EOF |
+			       RC632_BPSKD_NO_RX_EGT));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_RX_CONTROL2,
+			      (RC632_RXCTRL2_AUTO_PD |
+			       RC632_RXCTRL2_DECSRC_INT));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_RX_WAIT, 0x03);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CHANNEL_REDUNDANCY,
+			      (RC632_CR_TX_CRC_ENABLE |
+			       RC632_CR_RX_CRC_ENABLE |
+			       RC632_CR_CRC3309));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CRC_PRESET_LSB, 0xff);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(handle, RC632_REG_CRC_PRESET_MSB, 0xff);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int
+rc632_iso15693_init(struct rfid_asic_handle *h)
+{
+	int ret;
+
+	ret = rc632_reg_write(h, RC632_REG_TX_CONTROL,
+						(RC632_TXCTRL_MOD_SRC_INT |
+						 RC632_TXCTRL_TX2_INV |
+						 RC632_TXCTRL_TX2_RF_EN |
+						 RC632_TXCTRL_TX1_RF_EN));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CW_CONDUCTANCE, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_CONDUCTANCE, 0x03);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CODER_CONTROL,
+						(RC632_CDRCTRL_RATE_15693 |
+						 0x03)); /* FIXME */
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_WIDTH, 0x3f);
+	if (ret < 0)
+		return ret;
+	
+	ret = rc632_reg_write(h, RC632_REG_MOD_WIDTH_SOF, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_TYPE_B_FRAMING, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_CONTROL1, 
+						(RC632_RXCTRL1_SUBCP_16 |
+						 RC632_RXCTRL1_ISO15693 |
+						 RC632_RXCTRL1_GAIN_35DB));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_DECODER_CONTROL,
+						(RC632_DECCTRL_RXFR_15693 |
+						 RC632_DECCTRL_RX_INVERT));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_BIT_PHASE, 0xe0);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_THRESHOLD, 0xff);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_BPSK_DEM_CONTROL, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_CONTROL2,
+						(RC632_RXCTRL2_AUTO_PD |
+						 RC632_RXCTRL2_DECSRC_INT));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CHANNEL_REDUNDANCY,
+						(RC632_CR_CRC3309 |
+						 RC632_CR_RX_CRC_ENABLE |
+						 RC632_CR_TX_CRC_ENABLE));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CRC_PRESET_LSB, 0xff);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CRC_PRESET_MSB, 0xff);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int
+rc632_iso15693_icode_init(struct rfid_asic_handle *h)
+{
+	int ret;
+
+	ret = rc632_reg_write(h, RC632_REG_TX_CONTROL,
+						(RC632_TXCTRL_MOD_SRC_INT |
+						 RC632_TXCTRL_TX2_INV |
+						 RC632_TXCTRL_TX2_RF_EN |
+						 RC632_TXCTRL_TX1_RF_EN));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CW_CONDUCTANCE, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_CONDUCTANCE, 0x02);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CODER_CONTROL, 0x2c);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_WIDTH, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_WIDTH_SOF, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_WIDTH_SOF, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_TYPE_B_FRAMING, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_CONTROL1, 0x8b); /* FIXME */
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_DECODER_CONTROL, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_BIT_PHASE, 0x52);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_THRESHOLD, 0x66);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_BPSK_DEM_CONTROL, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_CONTROL2, 
+						RC632_RXCTRL2_DECSRC_INT);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CHANNEL_REDUNDANCY,
+						(RC632_CR_RX_CRC_ENABLE |
+						 RC632_CR_TX_CRC_ENABLE));
+	ret = rc632_reg_write(h, RC632_REG_CRC_PRESET_LSB, 0xfe);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CRC_PRESET_MSB, 0xff);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int
+rc632_iso15693_icl_init(struct rfid_asic_handle *h)
+{
+	int ret;
+	
+	/* ICL */
+
+	ret = rc632_reg_write(h, RC632_REG_TX_CONTROL, 
+						(RC632_TXCTRL_MOD_SRC_INT |	
+						 RC632_TXCTRL_TX2_INV |
+						 RC632_TXCTRL_TX2_RF_EN |
+						 RC632_TXCTRL_TX1_RF_EN));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CW_CONDUCTANCE, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_CONDUCTANCE, 0x11);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CODER_CONTROL, 
+						(RC632_CDRCTRL_RATE_15693 |
+						 RC632_CDRCTRL_TXCD_ICODE_STD |
+						 0x03)); /* FIXME */
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_WIDTH, 0x3f);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_MOD_WIDTH_SOF, 0x3f);
+	if (ret < 0)
+		return ret;
+	ret = rc632_reg_write(h, RC632_REG_RX_CONTROL1, 
+						(RC632_RXCTRL1_SUBCP_16|
+						 RC632_RXCTRL1_ISO15693|
+						 RC632_RXCTRL1_GAIN_35DB));
+	if (ret < 0)
+		return ret;
+	ret = rc632_reg_write(h, RC632_REG_DECODER_CONTROL,
+						(RC632_DECCTRL_RX_INVERT|
+						 RC632_DECCTRL_RXFR_15693));
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_BIT_PHASE, 0xbd);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_THRESHOLD, 0xff);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_BPSK_DEM_CONTROL, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_RX_CONTROL2, 
+						RC632_RXCTRL2_DECSRC_INT);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CHANNEL_REDUNDANCY, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CRC_PRESET_LSB, 0x12);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_CRC_PRESET_MSB, 0xe0);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+struct mifare_authcmd {
+	u_int8_t auth_cmd;
+	u_int8_t block_address;
+	u_int32_t serno;	/* lsb 1 2 msb */
+} __attribute__ ((packed));
+
+
+#define RFID_MIFARE_KEY_LEN 6
+#define RFID_MIFARE_KEY_CODED_LEN 12
+
+/* Transform crypto1 key from generic 6byte into rc632 specific 12byte */
+static int
+rc632_mifare_transform_key(const u_int8_t *key6, u_int8_t *key12)
+{
+	int i;
+	u_int8_t ln;
+	u_int8_t hn;
+
+	for (i = 0; i < RFID_MIFARE_KEY_LEN; i++) {
+		ln = key6[i] & 0x0f;
+		hn = key6[i] >> 4;
+		key12[i * 2 + 1] = (~ln << 4) | ln;
+		key12[i * 2] = (~hn << 4) | hn;
+	}
+	return 0;
+}
+
+static int
+rc632_mifare_set_key(struct rfid_asic_handle *h, const u_int8_t *key)
+{
+	u_int8_t coded_key[RFID_MIFARE_KEY_CODED_LEN];
+	u_int8_t reg;
+	int ret;
+
+	ret = rc632_mifare_transform_key(key, coded_key);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_fifo_write(h, RFID_MIFARE_KEY_CODED_LEN, coded_key, 0x03);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_COMMAND, RC632_CMD_LOAD_KEY);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_wait_idle(h, RC632_TMO_AUTH1);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_read(h, RC632_REG_ERROR_FLAG, &reg);
+	if (ret < 0)
+		return ret;
+
+	if (reg & RC632_ERR_FLAG_KEY_ERR)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int
+rc632_mifare_auth(struct rfid_asic_handle *h, u_int8_t cmd, u_int32_t serno,
+		  u_int8_t block)
+{
+	int ret;
+	struct mifare_authcmd acmd;
+	u_int8_t reg;
+
+	if (cmd != RFID_CMD_MIFARE_AUTH1A && cmd != RFID_CMD_MIFARE_AUTH1B)
+		return -EINVAL;
+
+	/* Initialize acmd */
+	acmd.block_address = block & 0xff;
+	acmd.auth_cmd = cmd;
+	//acmd.serno = htonl(serno);
+	acmd.serno = serno;
+
+	/* Clear Rx CRC */
+	ret = rc632_clear_bits(h, RC632_REG_CHANNEL_REDUNDANCY,
+				RC632_CR_RX_CRC_ENABLE);
+	if (ret < 0)
+		return ret;
+
+	/* Send Authent1 Command */
+	ret = rc632_fifo_write(h, sizeof(acmd), (unsigned char *)&acmd, 0x03);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_write(h, RC632_REG_COMMAND, RC632_CMD_AUTHENT1);
+	if (ret < 0)
+		return ret;
+
+	/* Wait until transmitter is idle */
+	ret = rc632_wait_idle(h, RC632_TMO_AUTH1);
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_reg_read(h, RC632_REG_SECONDARY_STATUS, &reg);
+	if (ret < 0)
+		return ret;
+	if (reg & 0x07)
+		return -EIO;
+
+	/* Clear Tx CRC */
+	ret = rc632_clear_bits(h, RC632_REG_CHANNEL_REDUNDANCY,
+				RC632_CR_TX_CRC_ENABLE);
+	if (ret < 0)
+		return ret;
+
+	/* Send Authent2 Command */
+	ret = rc632_reg_write(h, RC632_REG_COMMAND, RC632_CMD_AUTHENT2);
+	if (ret < 0)
+		return ret;
+
+	/* Wait until transmitter is idle */
+	ret = rc632_wait_idle(h, RC632_TMO_AUTH1);
+	if (ret < 0)
+		return ret;
+
+	/* Check whether authentication was successful */
+	ret = rc632_reg_read(h, RC632_REG_CONTROL, &reg);
+	if (ret < 0)
+		return ret;
+
+	if (!(reg & RC632_CONTROL_CRYPTO1_ON))
+		return -EACCES;
+
+	return 0;
+
+}
+
+/* transceive regular frame */
+static int
+rc632_mifare_transceive(struct rfid_asic_handle *handle,
+			const u_int8_t *tx_buf, unsigned int tx_len,
+			u_int8_t *rx_buf, unsigned int *rx_len,
+			u_int64_t timeout, unsigned int flags)
+{
+	int ret;
+	u_int8_t rxl = *rx_len & 0xff;
+
+	DEBUGP("entered\n");
+	memset(rx_buf, 0, *rx_len);
+
+#if 1
+	ret = rc632_reg_write(handle, RC632_REG_CHANNEL_REDUNDANCY,
+				(RC632_CR_PARITY_ENABLE |
+				 RC632_CR_PARITY_ODD |
+				 RC632_CR_TX_CRC_ENABLE |
+				 RC632_CR_RX_CRC_ENABLE));
+#else
+	ret = rc632_clear_bits(handle, RC632_REG_CHANNEL_REDUNDANCY,
+				RC632_CR_RX_CRC_ENABLE|RC632_CR_TX_CRC_ENABLE);
+#endif
+	if (ret < 0)
+		return ret;
+
+	ret = rc632_transceive(handle, tx_buf, tx_len, rx_buf, &rxl, 0x32, 0);
+	*rx_len = rxl;
+	if (ret < 0)
+		return ret;
+
+
+	return 0; 
+}
+