* way to abort a command that's already been sent to the tag is so turn
* off power to the tag. If we do that, though, we'd have to go through
* the entire anticollision procedure again but the digital layer doesn't
- * support that. So, if an abort is received before trf7970a_in_send_cmd()
+ * support that. So, if an abort is received before trf7970a_send_cmd()
* has sent the command to the tag, it simply returns -ECANCELED. If the
* command has already been sent to the tag, then the driver continues
* normally and recieves the response data (or error) but just before
#define TRF7970A_SUPPORTED_PROTOCOLS \
(NFC_PROTO_MIFARE_MASK | NFC_PROTO_ISO14443_MASK | \
NFC_PROTO_ISO14443_B_MASK | NFC_PROTO_FELICA_MASK | \
- NFC_PROTO_ISO15693_MASK)
+ NFC_PROTO_ISO15693_MASK | NFC_PROTO_NFC_DEP_MASK)
#define TRF7970A_AUTOSUSPEND_DELAY 30000 /* 30 seconds */
/* TX length is 3 nibbles long ==> 4KB - 1 bytes max */
#define TRF7970A_TX_MAX (4096 - 1)
+#define TRF7970A_WAIT_FOR_TX_IRQ 20
#define TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT 20
#define TRF7970A_WAIT_FOR_FIFO_DRAIN_TIMEOUT 20
#define TRF7970A_WAIT_TO_ISSUE_ISO15693_EOF 40
#define TRF7970A_ISO_CTRL_14443B_848 0x0f
#define TRF7970A_ISO_CTRL_FELICA_212 0x1a
#define TRF7970A_ISO_CTRL_FELICA_424 0x1b
+#define TRF7970A_ISO_CTRL_NFC_NFCA_106 0x01
+#define TRF7970A_ISO_CTRL_NFC_NFCF_212 0x02
+#define TRF7970A_ISO_CTRL_NFC_NFCF_424 0x03
+#define TRF7970A_ISO_CTRL_NFC_CE_14443A 0x00
+#define TRF7970A_ISO_CTRL_NFC_CE_14443B 0x01
+#define TRF7970A_ISO_CTRL_NFC_CE BIT(2)
+#define TRF7970A_ISO_CTRL_NFC_ACTIVE BIT(3)
+#define TRF7970A_ISO_CTRL_NFC_INITIATOR BIT(4)
+#define TRF7970A_ISO_CTRL_NFC_NFC_CE_MODE BIT(5)
#define TRF7970A_ISO_CTRL_RFID BIT(5)
#define TRF7970A_ISO_CTRL_DIR_MODE BIT(6)
#define TRF7970A_ISO_CTRL_RX_CRC_N BIT(7) /* true == No CRC */
#define TRF7970A_MODULATOR_EN_OOK BIT(6)
#define TRF7970A_MODULATOR_27MHZ BIT(7)
+#define TRF7970A_RX_SPECIAL_SETTINGS_NO_LIM BIT(0)
+#define TRF7970A_RX_SPECIAL_SETTINGS_AGCR BIT(1)
+#define TRF7970A_RX_SPECIAL_SETTINGS_GD_0DB (0x0 << 2)
+#define TRF7970A_RX_SPECIAL_SETTINGS_GD_5DB (0x1 << 2)
+#define TRF7970A_RX_SPECIAL_SETTINGS_GD_10DB (0x2 << 2)
+#define TRF7970A_RX_SPECIAL_SETTINGS_GD_15DB (0x3 << 2)
+#define TRF7970A_RX_SPECIAL_SETTINGS_HBT BIT(4)
+#define TRF7970A_RX_SPECIAL_SETTINGS_M848 BIT(5)
+#define TRF7970A_RX_SPECIAL_SETTINGS_C424 BIT(6)
+#define TRF7970A_RX_SPECIAL_SETTINGS_C212 BIT(7)
+
+#define TRF7970A_REG_IO_CTRL_VRS(v) ((v) & 0x07)
+#define TRF7970A_REG_IO_CTRL_IO_LOW BIT(5)
+#define TRF7970A_REG_IO_CTRL_EN_EXT_PA BIT(6)
+#define TRF7970A_REG_IO_CTRL_AUTO_REG BIT(7)
+
/* IRQ Status Register Bits */
#define TRF7970A_IRQ_STATUS_NORESP BIT(0) /* ISO15693 only */
+#define TRF7970A_IRQ_STATUS_NFC_COL_ERROR BIT(0)
#define TRF7970A_IRQ_STATUS_COL BIT(1)
#define TRF7970A_IRQ_STATUS_FRAMING_EOF_ERROR BIT(2)
+#define TRF7970A_IRQ_STATUS_NFC_RF BIT(2)
#define TRF7970A_IRQ_STATUS_PARITY_ERROR BIT(3)
+#define TRF7970A_IRQ_STATUS_NFC_SDD BIT(3)
#define TRF7970A_IRQ_STATUS_CRC_ERROR BIT(4)
+#define TRF7970A_IRQ_STATUS_NFC_PROTO_ERROR BIT(4)
#define TRF7970A_IRQ_STATUS_FIFO BIT(5)
#define TRF7970A_IRQ_STATUS_SRX BIT(6)
#define TRF7970A_IRQ_STATUS_TX BIT(7)
#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_16 0x2
#define TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_32 0x3
+#define TRF7970A_NFC_LOW_FIELD_LEVEL_RFDET(v) ((v) & 0x07)
+#define TRF7970A_NFC_LOW_FIELD_LEVEL_CLEX_DIS BIT(7)
+
+#define TRF7970A_NFC_TARGET_LEVEL_RFDET(v) ((v) & 0x07)
+#define TRF7970A_NFC_TARGET_LEVEL_HI_RF BIT(3)
+#define TRF7970A_NFC_TARGET_LEVEL_SDD_EN BIT(3)
+#define TRF7970A_NFC_TARGET_LEVEL_LD_S_4BYTES (0x0 << 6)
+#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 */
TRF7970A_ST_WAIT_FOR_RX_DATA,
TRF7970A_ST_WAIT_FOR_RX_DATA_CONT,
TRF7970A_ST_WAIT_TO_ISSUE_EOF,
+ TRF7970A_ST_LISTENING,
+ TRF7970A_ST_LISTENING_MD,
TRF7970A_ST_MAX
};
struct regulator *regulator;
struct nfc_digital_dev *ddev;
u32 quirks;
+ bool is_initiator;
bool aborting;
struct sk_buff *tx_skb;
struct sk_buff *rx_skb;
unsigned int guard_time;
int technology;
int framing;
+ u8 md_rf_tech;
u8 tx_cmd;
bool issue_eof;
int en2_gpio;
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);
{
dev_dbg(trf->dev, "Error - state: %d, errno: %d\n", trf->state, errno);
+ cancel_delayed_work(&trf->timeout_work);
+
kfree_skb(trf->rx_skb);
trf->rx_skb = ERR_PTR(errno);
timeout = TRF7970A_WAIT_TO_ISSUE_ISO15693_EOF;
} else {
trf->state = TRF7970A_ST_WAIT_FOR_RX_DATA;
- timeout = trf->timeout;
+
+ if (!trf->timeout)
+ timeout = TRF7970A_WAIT_FOR_TX_IRQ;
+ else
+ timeout = trf->timeout;
}
}
{
struct trf7970a *trf = dev_id;
int ret;
- u8 status, fifo_bytes;
+ u8 status, fifo_bytes, iso_ctrl;
mutex_lock(&trf->lock);
switch (trf->state) {
case TRF7970A_ST_IDLE:
case TRF7970A_ST_IDLE_RX_BLOCKED:
- /* If getting interrupts caused by RF noise, turn off the
- * receiver to avoid unnecessary interrupts. It will be
- * turned back on in trf7970a_in_send_cmd() when the next
- * command is issued.
+ /* If initiator and getting interrupts caused by RF noise,
+ * turn off the receiver to avoid unnecessary interrupts.
+ * It will be turned back on in trf7970a_send_cmd() when
+ * the next command is issued.
*/
- if (status & TRF7970A_IRQ_STATUS_ERROR) {
+ if (trf->is_initiator && (status & TRF7970A_IRQ_STATUS_ERROR)) {
trf7970a_cmd(trf, TRF7970A_CMD_BLOCK_RX);
trf->state = TRF7970A_ST_IDLE_RX_BLOCKED;
}
trf7970a_send_err_upstream(trf, ret);
else if (!fifo_bytes)
trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
- } else if (status == TRF7970A_IRQ_STATUS_TX) {
+ } else if ((status == TRF7970A_IRQ_STATUS_TX) ||
+ (!trf->is_initiator &&
+ (status == (TRF7970A_IRQ_STATUS_TX |
+ TRF7970A_IRQ_STATUS_NFC_RF)))) {
trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
+
+ if (!trf->timeout) {
+ trf->ignore_timeout = !cancel_delayed_work(
+ &trf->timeout_work);
+ trf->rx_skb = ERR_PTR(0);
+ trf7970a_send_upstream(trf);
+ break;
+ }
+
+ if (trf->is_initiator)
+ break;
+
+ iso_ctrl = trf->iso_ctrl;
+
+ switch (trf->framing) {
+ case NFC_DIGITAL_FRAMING_NFCA_STANDARD:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT_NO_CRC;
+ iso_ctrl |= TRF7970A_ISO_CTRL_RX_CRC_N;
+ trf->iso_ctrl = 0xff; /* Force ISO_CTRL write */
+ break;
+ case NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT;
+ iso_ctrl &= ~TRF7970A_ISO_CTRL_RX_CRC_N;
+ trf->iso_ctrl = 0xff; /* Force ISO_CTRL write */
+ break;
+ case NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE:
+ ret = trf7970a_write(trf,
+ TRF7970A_SPECIAL_FCN_REG1,
+ TRF7970A_SPECIAL_FCN_REG1_14_ANTICOLL);
+ if (ret)
+ goto err_unlock_exit;
+
+ trf->special_fcn_reg1 =
+ TRF7970A_SPECIAL_FCN_REG1_14_ANTICOLL;
+ break;
+ default:
+ break;
+ }
+
+ if (iso_ctrl != trf->iso_ctrl) {
+ ret = trf7970a_write(trf, TRF7970A_ISO_CTRL,
+ iso_ctrl);
+ if (ret)
+ goto err_unlock_exit;
+
+ trf->iso_ctrl = iso_ctrl;
+ }
} else {
trf7970a_send_err_upstream(trf, -EIO);
}
if (status != TRF7970A_IRQ_STATUS_TX)
trf7970a_send_err_upstream(trf, -EIO);
break;
+ case TRF7970A_ST_LISTENING:
+ if (status & TRF7970A_IRQ_STATUS_SRX) {
+ trf->ignore_timeout =
+ !cancel_delayed_work(&trf->timeout_work);
+ trf7970a_drain_fifo(trf, status);
+ } else if (!(status & TRF7970A_IRQ_STATUS_NFC_RF)) {
+ 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);
}
+err_unlock_exit:
mutex_unlock(&trf->lock);
return IRQ_HANDLED;
}
trf->modulator_sys_clk_ctrl = 0;
- /* Must clear NFC Target Detection Level reg due to erratum */
- ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);
- if (ret)
- goto err_out;
-
ret = trf7970a_write(trf, TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS,
TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_96 |
TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_32);
/* FALLTHROUGH */
case TRF7970A_ST_IDLE:
case TRF7970A_ST_IDLE_RX_BLOCKED:
+ case TRF7970A_ST_WAIT_FOR_RX_DATA:
+ case TRF7970A_ST_WAIT_FOR_RX_DATA_CONT:
trf7970a_switch_rf_off(trf);
}
}
trf->technology = tech;
+ /* If in initiator mode and not changing the RF tech due to a
+ * PSL sequence (indicated by 'trf->iso_ctrl == 0xff' from
+ * trf7970a_init()), clear the NFC Target Detection Level register
+ * due to erratum.
+ */
+ if (trf->iso_ctrl == 0xff)
+ ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);
+
return ret;
}
case NFC_DIGITAL_FRAMING_NFCF_T3T:
case NFC_DIGITAL_FRAMING_ISO15693_INVENTORY:
case NFC_DIGITAL_FRAMING_ISO15693_T5T:
+ case NFC_DIGITAL_FRAMING_NFCA_NFC_DEP:
+ case NFC_DIGITAL_FRAMING_NFCF_NFC_DEP:
trf->tx_cmd = TRF7970A_CMD_TRANSMIT;
iso_ctrl &= ~TRF7970A_ISO_CTRL_RX_CRC_N;
break;
mutex_lock(&trf->lock);
+ trf->is_initiator = true;
+
if ((trf->state == TRF7970A_ST_PWR_OFF) ||
(trf->state == TRF7970A_ST_RF_OFF)) {
ret = trf7970a_switch_rf_on(trf);
return 0;
}
-static int trf7970a_in_send_cmd(struct nfc_digital_dev *ddev,
+static int trf7970a_send_cmd(struct nfc_digital_dev *ddev,
struct sk_buff *skb, u16 timeout,
nfc_digital_cmd_complete_t cb, void *arg)
{
goto out_err;
}
- trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE,
- GFP_KERNEL);
- if (!trf->rx_skb) {
- dev_dbg(trf->dev, "Can't alloc rx_skb\n");
- ret = -ENOMEM;
- goto out_err;
+ if (timeout) {
+ trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE,
+ GFP_KERNEL);
+ if (!trf->rx_skb) {
+ dev_dbg(trf->dev, "Can't alloc rx_skb\n");
+ ret = -ENOMEM;
+ goto out_err;
+ }
}
if (trf->state == TRF7970A_ST_IDLE_RX_BLOCKED) {
trf->state = TRF7970A_ST_IDLE;
}
- ret = trf7970a_per_cmd_config(trf, skb);
- if (ret)
- goto out_err;
+ if (trf->is_initiator) {
+ ret = trf7970a_per_cmd_config(trf, skb);
+ if (ret)
+ goto out_err;
+ }
trf->ddev = ddev;
trf->tx_skb = skb;
return ret;
}
-static int trf7970a_tg_configure_hw(struct nfc_digital_dev *ddev,
- int type, int param)
+static int trf7970a_tg_config_rf_tech(struct trf7970a *trf, int tech)
+{
+ int ret = 0;
+
+ dev_dbg(trf->dev, "rf technology: %d\n", tech);
+
+ switch (tech) {
+ case NFC_DIGITAL_RF_TECH_106A:
+ trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_NFC_NFC_CE_MODE |
+ TRF7970A_ISO_CTRL_NFC_CE |
+ TRF7970A_ISO_CTRL_NFC_CE_14443A;
+ trf->modulator_sys_clk_ctrl = TRF7970A_MODULATOR_DEPTH_OOK;
+ break;
+ case NFC_DIGITAL_RF_TECH_212F:
+ trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_NFC_NFC_CE_MODE |
+ TRF7970A_ISO_CTRL_NFC_NFCF_212;
+ trf->modulator_sys_clk_ctrl = TRF7970A_MODULATOR_DEPTH_ASK10;
+ break;
+ case NFC_DIGITAL_RF_TECH_424F:
+ trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_NFC_NFC_CE_MODE |
+ TRF7970A_ISO_CTRL_NFC_NFCF_424;
+ trf->modulator_sys_clk_ctrl = TRF7970A_MODULATOR_DEPTH_ASK10;
+ break;
+ default:
+ dev_dbg(trf->dev, "Unsupported rf technology: %d\n", tech);
+ return -EINVAL;
+ }
+
+ trf->technology = tech;
+
+ /* Normally we write the ISO_CTRL register in
+ * trf7970a_tg_config_framing() because the framing can change
+ * the value written. However, when sending a PSL RES,
+ * digital_tg_send_psl_res_complete() doesn't call
+ * trf7970a_tg_config_framing() so we must write the register
+ * here.
+ */
+ if ((trf->framing == NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED) &&
+ (trf->iso_ctrl_tech != trf->iso_ctrl)) {
+ ret = trf7970a_write(trf, TRF7970A_ISO_CTRL,
+ trf->iso_ctrl_tech);
+
+ trf->iso_ctrl = trf->iso_ctrl_tech;
+ }
+
+ return ret;
+}
+
+/* Since this is a target routine, several of the framing calls are
+ * made between receiving the request and sending the response so they
+ * should take effect until after the response is sent. This is accomplished
+ * by skipping the ISO_CTRL register write here and doing it in the interrupt
+ * handler.
+ */
+static int trf7970a_tg_config_framing(struct trf7970a *trf, int framing)
+{
+ u8 iso_ctrl = trf->iso_ctrl_tech;
+ int ret;
+
+ dev_dbg(trf->dev, "framing: %d\n", framing);
+
+ switch (framing) {
+ case NFC_DIGITAL_FRAMING_NFCA_NFC_DEP:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT_NO_CRC;
+ iso_ctrl |= TRF7970A_ISO_CTRL_RX_CRC_N;
+ break;
+ case NFC_DIGITAL_FRAMING_NFCA_STANDARD:
+ case NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A:
+ case NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE:
+ /* These ones are applied in the interrupt handler */
+ iso_ctrl = trf->iso_ctrl; /* Don't write to ISO_CTRL yet */
+ break;
+ case NFC_DIGITAL_FRAMING_NFCF_NFC_DEP:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT;
+ iso_ctrl &= ~TRF7970A_ISO_CTRL_RX_CRC_N;
+ break;
+ case NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED:
+ trf->tx_cmd = TRF7970A_CMD_TRANSMIT;
+ iso_ctrl &= ~TRF7970A_ISO_CTRL_RX_CRC_N;
+ break;
+ default:
+ dev_dbg(trf->dev, "Unsupported Framing: %d\n", framing);
+ return -EINVAL;
+ }
+
+ trf->framing = framing;
+
+ if (iso_ctrl != trf->iso_ctrl) {
+ ret = trf7970a_write(trf, TRF7970A_ISO_CTRL, iso_ctrl);
+ if (ret)
+ return ret;
+
+ trf->iso_ctrl = iso_ctrl;
+
+ ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
+ trf->modulator_sys_clk_ctrl);
+ if (ret)
+ return ret;
+ }
+
+ if (!(trf->chip_status_ctrl & TRF7970A_CHIP_STATUS_RF_ON)) {
+ ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
+ trf->chip_status_ctrl |
+ TRF7970A_CHIP_STATUS_RF_ON);
+ if (ret)
+ return ret;
+
+ trf->chip_status_ctrl |= TRF7970A_CHIP_STATUS_RF_ON;
+ }
+
+ return 0;
+}
+
+static int trf7970a_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
+ int param)
+{
+ struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
+ int ret;
+
+ dev_dbg(trf->dev, "Configure hw - type: %d, param: %d\n", type, param);
+
+ mutex_lock(&trf->lock);
+
+ trf->is_initiator = false;
+
+ if ((trf->state == TRF7970A_ST_PWR_OFF) ||
+ (trf->state == TRF7970A_ST_RF_OFF)) {
+ ret = trf7970a_switch_rf_on(trf);
+ if (ret)
+ goto err_unlock;
+ }
+
+ switch (type) {
+ case NFC_DIGITAL_CONFIG_RF_TECH:
+ ret = trf7970a_tg_config_rf_tech(trf, param);
+ break;
+ case NFC_DIGITAL_CONFIG_FRAMING:
+ ret = trf7970a_tg_config_framing(trf, param);
+ break;
+ default:
+ dev_dbg(trf->dev, "Unknown type: %d\n", type);
+ ret = -EINVAL;
+ }
+
+err_unlock:
+ mutex_unlock(&trf->lock);
+ return ret;
+}
+
+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;
+
+ mutex_lock(&trf->lock);
+
+ if ((trf->state != TRF7970A_ST_IDLE) &&
+ (trf->state != TRF7970A_ST_IDLE_RX_BLOCKED)) {
+ dev_err(trf->dev, "%s - Bogus state: %d\n", __func__,
+ trf->state);
+ ret = -EIO;
+ goto out_err;
+ }
- dev_dbg(trf->dev, "Unsupported interface\n");
+ if (trf->aborting) {
+ dev_dbg(trf->dev, "Abort process complete\n");
+ trf->aborting = false;
+ ret = -ECANCELED;
+ goto out_err;
+ }
+
+ trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE,
+ GFP_KERNEL);
+ if (!trf->rx_skb) {
+ dev_dbg(trf->dev, "Can't alloc rx_skb\n");
+ ret = -ENOMEM;
+ goto out_err;
+ }
+
+ ret = trf7970a_write(trf, TRF7970A_RX_SPECIAL_SETTINGS,
+ TRF7970A_RX_SPECIAL_SETTINGS_HBT |
+ TRF7970A_RX_SPECIAL_SETTINGS_M848 |
+ TRF7970A_RX_SPECIAL_SETTINGS_C424 |
+ TRF7970A_RX_SPECIAL_SETTINGS_C212);
+ if (ret)
+ goto out_err;
- return -EINVAL;
+ ret = trf7970a_write(trf, TRF7970A_REG_IO_CTRL,
+ TRF7970A_REG_IO_CTRL_VRS(0x1));
+ if (ret)
+ goto out_err;
+
+ ret = trf7970a_write(trf, TRF7970A_NFC_LOW_FIELD_LEVEL,
+ TRF7970A_NFC_LOW_FIELD_LEVEL_RFDET(0x3));
+ if (ret)
+ goto out_err;
+
+ ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL,
+ TRF7970A_NFC_TARGET_LEVEL_RFDET(0x7));
+ if (ret)
+ goto out_err;
+
+ trf->ddev = ddev;
+ trf->cb = cb;
+ trf->cb_arg = arg;
+ trf->timeout = timeout;
+ trf->ignore_timeout = false;
+
+ ret = trf7970a_cmd(trf, TRF7970A_CMD_ENABLE_RX);
+ if (ret)
+ goto out_err;
+
+ trf->state = mode_detect ? TRF7970A_ST_LISTENING_MD :
+ TRF7970A_ST_LISTENING;
+
+ schedule_delayed_work(&trf->timeout_work, msecs_to_jiffies(timeout));
+
+out_err:
+ mutex_unlock(&trf->lock);
+ return ret;
}
-static int trf7970a_tg_send_cmd(struct nfc_digital_dev *ddev,
- struct sk_buff *skb, u16 timeout,
+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, "Unsupported interface\n");
+ dev_dbg(trf->dev, "Listen - state: %d, timeout: %d ms\n",
+ trf->state, timeout);
- return -EINVAL;
+ return _trf7970a_tg_listen(ddev, timeout, cb, arg, false);
}
-static int trf7970a_tg_listen(struct nfc_digital_dev *ddev,
+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, "Unsupported interface\n");
+ dev_dbg(trf->dev, "Get RF Tech - state: %d, rf_tech: %d\n",
+ trf->state, trf->md_rf_tech);
- return -EINVAL;
+ *rf_tech = trf->md_rf_tech;
+
+ return 0;
}
static void trf7970a_abort_cmd(struct nfc_digital_dev *ddev)
case TRF7970A_ST_WAIT_TO_ISSUE_EOF:
trf->aborting = true;
break;
+ case TRF7970A_ST_LISTENING:
+ trf->ignore_timeout = !cancel_delayed_work(&trf->timeout_work);
+ trf7970a_send_err_upstream(trf, -ECANCELED);
+ dev_dbg(trf->dev, "Abort process complete\n");
+ break;
default:
break;
}
static struct nfc_digital_ops trf7970a_nfc_ops = {
.in_configure_hw = trf7970a_in_configure_hw,
- .in_send_cmd = trf7970a_in_send_cmd,
+ .in_send_cmd = trf7970a_send_cmd,
.tg_configure_hw = trf7970a_tg_configure_hw,
- .tg_send_cmd = trf7970a_tg_send_cmd,
+ .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,
};
case TRF7970A_ST_WAIT_FOR_RX_DATA:
case TRF7970A_ST_WAIT_FOR_RX_DATA_CONT:
case TRF7970A_ST_WAIT_TO_ISSUE_EOF:
+ case TRF7970A_ST_LISTENING:
trf7970a_send_err_upstream(trf, -ECANCELED);
/* FALLTHROUGH */
case TRF7970A_ST_IDLE:
trf->ddev = nfc_digital_allocate_device(&trf7970a_nfc_ops,
TRF7970A_SUPPORTED_PROTOCOLS,
- NFC_DIGITAL_DRV_CAPS_IN_CRC, 0, 0);
+ NFC_DIGITAL_DRV_CAPS_IN_CRC |
+ NFC_DIGITAL_DRV_CAPS_TG_CRC, 0, 0);
if (!trf->ddev) {
dev_err(trf->dev, "Can't allocate NFC digital device\n");
ret = -ENOMEM;
{
struct spi_device *spi = container_of(dev, struct spi_device, dev);
struct trf7970a *trf = spi_get_drvdata(spi);
- int ret = 0;
dev_dbg(dev, "Suspend\n");
mutex_unlock(&trf->lock);
- return ret;
+ return 0;
}
static int trf7970a_resume(struct device *dev)
{
struct spi_device *spi = container_of(dev, struct spi_device, dev);
struct trf7970a *trf = spi_get_drvdata(spi);
- int ret = 0;
+ int ret;
dev_dbg(dev, "Resume\n");
projects / karo-tx-linux.git / blobdiff