diff options
Diffstat (limited to 'src/rfid_asic_rc632.c')
| -rw-r--r-- | src/rfid_asic_rc632.c | 1295 |
1 files changed, 1295 insertions, 0 deletions
diff --git a/src/rfid_asic_rc632.c b/src/rfid_asic_rc632.c new file mode 100644 index 0000000..4377d73 --- /dev/null +++ b/src/rfid_asic_rc632.c @@ -0,0 +1,1295 @@ +/* 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 <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <sys/types.h> + +#include <rfid/rfid.h> +#include <rfid/rfid_asic.h> +#include <rfid/rfid_asic_rc632.h> +#include <rfid/rfid_reader_cm5121.h> +#include <rfid/rfid_layer2_iso14443a.h> +#include <rfid/rfid_protocol_mifare_classic.h> + +#include "rfid_iso14443_common.h" +#include "rc632.h" +//#include "rc632_14443a.h" + + +#define RC632_TMO_AUTH1 14000 + +#define ENTER() DEBUGP("entering\n") +struct rfid_asic rc632; + +/* Register and FIFO Access functions */ +static int +rc632_reg_write(struct rfid_asic_handle *handle, + u_int8_t reg, + u_int8_t val) +{ + return handle->rath->rat->priv.rc632.fn.reg_write(handle->rath, reg, val); +} + +static int +rc632_reg_read(struct rfid_asic_handle *handle, + u_int8_t reg, + u_int8_t *val) +{ + return handle->rath->rat->priv.rc632.fn.reg_read(handle->rath, reg, val); +} + +static int +rc632_fifo_write(struct rfid_asic_handle *handle, + u_int8_t len, + const u_int8_t *buf, + u_int8_t flags) +{ + return handle->rath->rat->priv.rc632.fn.fifo_write(handle->rath, + len, buf, flags); +} + +static int +rc632_fifo_read(struct rfid_asic_handle *handle, + u_int8_t len, + u_int8_t *buf) +{ + return handle->rath->rat->priv.rc632.fn.fifo_read(handle->rath, len, buf); +} + + +static int +rc632_set_bits(struct rfid_asic_handle *handle, + u_int8_t reg, + u_int8_t val) +{ + int ret; + u_int8_t tmp; + + ret = rc632_reg_read(handle, reg, &tmp); + if (ret < 0) + return -1; + + /* if bits are already set, no need to set them again */ + if ((tmp & val) == val) + return 0; + + return rc632_reg_write(handle, reg, (tmp|val)&0xff); +} + +static int +rc632_clear_bits(struct rfid_asic_handle *handle, + u_int8_t reg, + u_int8_t val) +{ + int ret; + u_int8_t tmp; + + ret = rc632_reg_read(handle, reg, &tmp); + if (ret < 0) { + DEBUGP("error during reg_read(%p, %d):%d\n", + handle, reg, ret); + return -1; + } + /* if bits are already cleared, no need to clear them again */ + if ((tmp & val) == 0) + return 0; + + return rc632_reg_write(handle, reg, (tmp & ~val)&0xff); +} + +static int +rc632_turn_on_rf(struct rfid_asic_handle *handle) +{ + ENTER(); + return rc632_set_bits(handle, RC632_REG_TX_CONTROL, 0x03); +} + +static 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); +} + +/* Stupid RC623 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; + + 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); + } + + usleep(100); + + /* Fixme: Abort after some timeout */ + } + + 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; + + ret = rc632_fifo_write(handle, len, buf, 0x03); + if (ret < 0) + return ret; + + ret = rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_TRANSMIT); + if (ret < 0) + return ret; + + 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_transcieve(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, + unsigned int timer, + unsigned int toggle) +{ + int ret; + + ret = rc632_fifo_write(handle, tx_len, tx_buf, 0x03); + if (ret < 0) + return ret; + + ret = rc632_reg_write(handle, RC632_REG_COMMAND, RC632_CMD_TRANSCIEVE); + if (ret < 0) + return ret; + + if (toggle == 1) + tcl_toggle_pcb(handle); + + ret = rc632_wait_idle(handle, timer); + if (ret < 0) + return ret; + + ret = rc632_reg_read(handle, RC632_REG_FIFO_LENGTH, rx_len); + if (ret < 0) + return ret; + + if (*rx_len == 0) { + u_int8_t tmp; + + DEBUGP("rx_len == 0\n"); + + rc632_reg_read(handle, RC632_REG_ERROR_FLAG, &tmp); + rc632_reg_read(handle, RC632_REG_CHANNEL_REDUNDANCY, &tmp); + + return -1; + } + + return rc632_fifo_read(handle, *rx_len, rx_buf); +} + +static int +rc632_read_eeprom(struct rfid_asic_handle *handle) +{ + u_int8_t recvbuf[60]; + u_int8_t sndbuf[3]; + int ret; + + sndbuf[0] = 0x00; + sndbuf[1] = 0x00; + sndbuf[2] = 0x3c; + + 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_fifo_read(handle, sizeof(recvbuf), recvbuf); + if (ret < 0) + return ret; + + // FIXME: do something with eeprom contents + return ret; +} + +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; +} + + + +/* generic FIFO access functions (if no more efficient ones provided by + * transport driver) */ + +static int +generic_fifo_write() +{ + // FIXME: implementation (not needed for CM 5121) + return -1; +} + +static int +generic_fifo_read() +{ + // FIXME: implementation (not neded for CM 5121) + return -1; +} + +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; +} + +struct rfid_asic_handle * +rc632_open(struct rfid_asic_transport_handle *th) +{ + struct rfid_asic_handle *h; + + h = malloc(sizeof(*h)); + if (!h) + return NULL; + memset(h, 0, sizeof(*h)); + + h->asic = &rc632; + h->rath = th; + h->fc = h->asic->fc; + h->mtu = h->mru = 40; /* FIXME */ + + if (rc632_init(h) < 0) { + free(h); + return NULL; + } + + return h; +} + +void +rc632_close(struct rfid_asic_handle *h) +{ + rc632_fini(h); + free(h); +} + + +/* + * Philips CL RC632 primitives for ISO 14443-A compliant PICC's + * + * (C) 2005 by Harald Welte <laforge@gnumonks.org> + * + */ + +static 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, + CM5121_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, + CM5121_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, + CM5121_14443A_BITPHASE); + if (ret < 0) + return ret; + + ret = rc632_reg_write(handle, RC632_REG_RX_THRESHOLD, + CM5121_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 */ +static int +rc632_iso14443a_transcieve_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; + + 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_transcieve(handle, tx_buf, sizeof(tx_buf), + (u_int8_t *)atqa, &rx_len, 0x32, 0); + if (ret < 0) { + DEBUGP("error during rc632_transcieve()\n"); + 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) { + DEBUGP("rx_len(%d) != 2\n", rx_len); + return -1; + } + + return 0; +} + +/* transcieve regular frame */ +static int +rc632_iso14443ab_transcieve(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; + + 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_transcieve(handle, tx_buf, tx_len, rx_buf, &rxl, 0x32, 0); + *rx_len = rxl; + if (ret < 0) + return ret; + + + return 0; +} + +/* transcieve anti collission bitframe */ +static int +rc632_iso14443a_transcieve_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_transcieve(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; +} + +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, + CM5121_14443B_BITPHASE); + if (ret < 0) + return ret; + + ret = rc632_reg_write(handle, RC632_REG_RX_THRESHOLD, + CM5121_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, ®); + 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; + + ret = rc632_clear_bits(h, RC632_REG_CONTROL, + RC632_CONTROL_CRYPTO1_ON); + + /* 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, ®); + 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, ®); + if (ret < 0) + return ret; + + if (!(reg & RC632_CONTROL_CRYPTO1_ON)) + return -EACCES; + + return 0; + +} + +/* transcieve regular frame */ +static int +rc632_mifare_transcieve(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_transcieve(handle, tx_buf, tx_len, rx_buf, &rxl, 0x32, 0); + *rx_len = rxl; + if (ret < 0) + return ret; + + + return 0; +} + +struct rfid_asic rc632 = { + .name = "Philips CL RC632", + .fc = ISO14443_FREQ_CARRIER, + .priv.rc632 = { + .fn = { + .power_up = &rc632_power_up, + .power_down = &rc632_power_down, + .turn_on_rf = &rc632_turn_on_rf, + .turn_off_rf = &rc632_turn_off_rf, + .transcieve = &rc632_iso14443ab_transcieve, + .iso14443a = { + .init = &rc632_iso14443a_init, + .transcieve_sf = &rc632_iso14443a_transcieve_sf, + .transcieve_acf = &rc632_iso14443a_transcieve_acf, + }, + .iso14443b = { + .init = &rc632_iso14443b_init, + }, + .iso15693 = { + .init = &rc632_iso15693_init, + }, + .mifare_classic = { + .setkey = &rc632_mifare_set_key, + .auth = &rc632_mifare_auth, + }, + }, + }, +}; |