diff options
Diffstat (limited to 'drivers/nfc/trf7970a.c')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 160 |
1 files changed, 154 insertions, 6 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index b33cc0211f53..2a521bb38060 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -340,6 +340,39 @@ #define TRF7970A_NFC_TARGET_LEVEL_LD_S_7BYTES (0x1 << 6) #define TRF7970A_NFC_TARGET_LEVEL_LD_S_10BYTES (0x2 << 6) +#define TRF79070A_NFC_TARGET_PROTOCOL_NFCBR_106 BIT(0) +#define TRF79070A_NFC_TARGET_PROTOCOL_NFCBR_212 BIT(1) +#define TRF79070A_NFC_TARGET_PROTOCOL_NFCBR_424 (BIT(0) | BIT(1)) +#define TRF79070A_NFC_TARGET_PROTOCOL_PAS_14443B BIT(2) +#define TRF79070A_NFC_TARGET_PROTOCOL_PAS_106 BIT(3) +#define TRF79070A_NFC_TARGET_PROTOCOL_FELICA BIT(4) +#define TRF79070A_NFC_TARGET_PROTOCOL_RF_L BIT(6) +#define TRF79070A_NFC_TARGET_PROTOCOL_RF_H BIT(7) + +#define TRF79070A_NFC_TARGET_PROTOCOL_106A \ + (TRF79070A_NFC_TARGET_PROTOCOL_RF_H | \ + TRF79070A_NFC_TARGET_PROTOCOL_RF_L | \ + TRF79070A_NFC_TARGET_PROTOCOL_PAS_106 | \ + TRF79070A_NFC_TARGET_PROTOCOL_NFCBR_106) + +#define TRF79070A_NFC_TARGET_PROTOCOL_106B \ + (TRF79070A_NFC_TARGET_PROTOCOL_RF_H | \ + TRF79070A_NFC_TARGET_PROTOCOL_RF_L | \ + TRF79070A_NFC_TARGET_PROTOCOL_PAS_14443B | \ + TRF79070A_NFC_TARGET_PROTOCOL_NFCBR_106) + +#define TRF79070A_NFC_TARGET_PROTOCOL_212F \ + (TRF79070A_NFC_TARGET_PROTOCOL_RF_H | \ + TRF79070A_NFC_TARGET_PROTOCOL_RF_L | \ + TRF79070A_NFC_TARGET_PROTOCOL_FELICA | \ + TRF79070A_NFC_TARGET_PROTOCOL_NFCBR_212) + +#define TRF79070A_NFC_TARGET_PROTOCOL_424F \ + (TRF79070A_NFC_TARGET_PROTOCOL_RF_H | \ + TRF79070A_NFC_TARGET_PROTOCOL_RF_L | \ + TRF79070A_NFC_TARGET_PROTOCOL_FELICA | \ + TRF79070A_NFC_TARGET_PROTOCOL_NFCBR_424) + #define TRF7970A_FIFO_STATUS_OVERFLOW BIT(7) /* NFC (ISO/IEC 14443A) Type 2 Tag commands */ @@ -385,6 +418,7 @@ enum trf7970a_state { TRF7970A_ST_WAIT_FOR_RX_DATA_CONT, TRF7970A_ST_WAIT_TO_ISSUE_EOF, TRF7970A_ST_LISTENING, + TRF7970A_ST_LISTENING_MD, TRF7970A_ST_MAX }; @@ -409,6 +443,7 @@ struct trf7970a { unsigned int guard_time; int technology; int framing; + u8 md_rf_tech; u8 tx_cmd; bool issue_eof; int en2_gpio; @@ -516,6 +551,58 @@ static int trf7970a_read_irqstatus(struct trf7970a *trf, u8 *status) return ret; } +static int trf7970a_read_target_proto(struct trf7970a *trf, u8 *target_proto) +{ + int ret; + u8 buf[2]; + u8 addr; + + addr = TRF79070A_NFC_TARGET_PROTOCOL | TRF7970A_CMD_BIT_RW | + TRF7970A_CMD_BIT_CONTINUOUS; + + ret = spi_write_then_read(trf->spi, &addr, 1, buf, 2); + if (ret) + dev_err(trf->dev, "%s - target_proto: Read failed: %d\n", + __func__, ret); + else + *target_proto = buf[0]; + + return ret; +} + +static int trf7970a_mode_detect(struct trf7970a *trf, u8 *rf_tech) +{ + int ret; + u8 target_proto, tech; + + ret = trf7970a_read_target_proto(trf, &target_proto); + if (ret) + return ret; + + switch (target_proto) { + case TRF79070A_NFC_TARGET_PROTOCOL_106A: + tech = NFC_DIGITAL_RF_TECH_106A; + break; + case TRF79070A_NFC_TARGET_PROTOCOL_106B: + tech = NFC_DIGITAL_RF_TECH_106B; + break; + case TRF79070A_NFC_TARGET_PROTOCOL_212F: + tech = NFC_DIGITAL_RF_TECH_212F; + break; + case TRF79070A_NFC_TARGET_PROTOCOL_424F: + tech = NFC_DIGITAL_RF_TECH_424F; + break; + default: + dev_dbg(trf->dev, "%s - mode_detect: target_proto: 0x%x\n", + __func__, target_proto); + return -EIO; + } + + *rf_tech = tech; + + return ret; +} + static void trf7970a_send_upstream(struct trf7970a *trf) { dev_kfree_skb_any(trf->tx_skb); @@ -867,6 +954,22 @@ static irqreturn_t trf7970a_irq(int irq, void *dev_id) trf7970a_send_err_upstream(trf, -EIO); } break; + case TRF7970A_ST_LISTENING_MD: + if (status & TRF7970A_IRQ_STATUS_SRX) { + trf->ignore_timeout = + !cancel_delayed_work(&trf->timeout_work); + + ret = trf7970a_mode_detect(trf, &trf->md_rf_tech); + if (ret) { + trf7970a_send_err_upstream(trf, ret); + } else { + trf->state = TRF7970A_ST_LISTENING; + trf7970a_drain_fifo(trf, status); + } + } else if (!(status & TRF7970A_IRQ_STATUS_NFC_RF)) { + trf7970a_send_err_upstream(trf, -EIO); + } + break; default: dev_err(trf->dev, "%s - Driver in invalid state: %d\n", __func__, trf->state); @@ -1587,15 +1690,12 @@ err_unlock: return ret; } -static int trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout, - nfc_digital_cmd_complete_t cb, void *arg) +static int _trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout, + nfc_digital_cmd_complete_t cb, void *arg, bool mode_detect) { struct trf7970a *trf = nfc_digital_get_drvdata(ddev); int ret; - dev_dbg(trf->dev, "Listen - state: %d, timeout: %d ms\n", - trf->state, timeout); - mutex_lock(&trf->lock); if ((trf->state != TRF7970A_ST_IDLE) && @@ -1654,7 +1754,8 @@ static int trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout, if (ret) goto out_err; - trf->state = TRF7970A_ST_LISTENING; + trf->state = mode_detect ? TRF7970A_ST_LISTENING_MD : + TRF7970A_ST_LISTENING; schedule_delayed_work(&trf->timeout_work, msecs_to_jiffies(timeout)); @@ -1663,6 +1764,51 @@ out_err: return ret; } +static int trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout, + nfc_digital_cmd_complete_t cb, void *arg) +{ + struct trf7970a *trf = nfc_digital_get_drvdata(ddev); + + dev_dbg(trf->dev, "Listen - state: %d, timeout: %d ms\n", + trf->state, timeout); + + return _trf7970a_tg_listen(ddev, timeout, cb, arg, false); +} + +static int trf7970a_tg_listen_md(struct nfc_digital_dev *ddev, + u16 timeout, nfc_digital_cmd_complete_t cb, void *arg) +{ + struct trf7970a *trf = nfc_digital_get_drvdata(ddev); + int ret; + + dev_dbg(trf->dev, "Listen MD - state: %d, timeout: %d ms\n", + trf->state, timeout); + + ret = trf7970a_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, + NFC_DIGITAL_RF_TECH_106A); + if (ret) + return ret; + + ret = trf7970a_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, + NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); + if (ret) + return ret; + + return _trf7970a_tg_listen(ddev, timeout, cb, arg, true); +} + +static int trf7970a_tg_get_rf_tech(struct nfc_digital_dev *ddev, u8 *rf_tech) +{ + struct trf7970a *trf = nfc_digital_get_drvdata(ddev); + + dev_dbg(trf->dev, "Get RF Tech - state: %d, rf_tech: %d\n", + trf->state, trf->md_rf_tech); + + *rf_tech = trf->md_rf_tech; + + return 0; +} + static void trf7970a_abort_cmd(struct nfc_digital_dev *ddev) { struct trf7970a *trf = nfc_digital_get_drvdata(ddev); @@ -1696,6 +1842,8 @@ static struct nfc_digital_ops trf7970a_nfc_ops = { .tg_configure_hw = trf7970a_tg_configure_hw, .tg_send_cmd = trf7970a_send_cmd, .tg_listen = trf7970a_tg_listen, + .tg_listen_md = trf7970a_tg_listen_md, + .tg_get_rf_tech = trf7970a_tg_get_rf_tech, .switch_rf = trf7970a_switch_rf, .abort_cmd = trf7970a_abort_cmd, }; |