#include <linux/nfc.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/of.h>
-#include <linux/of_gpio.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
NFC_PROTO_ISO14443_B_MASK | NFC_PROTO_FELICA_MASK | \
NFC_PROTO_ISO15693_MASK | NFC_PROTO_NFC_DEP_MASK)
-#define TRF7970A_AUTOSUSPEND_DELAY 30000 /* 30 seconds */
+#define TRF7970A_AUTOSUSPEND_DELAY 30000 /* 30 seconds */
#define TRF7970A_13MHZ_CLOCK_FREQUENCY 13560000
#define TRF7970A_27MHZ_CLOCK_FREQUENCY 27120000
-
#define TRF7970A_RX_SKB_ALLOC_SIZE 256
#define TRF7970A_FIFO_SIZE 127
*/
#define TRF7970A_QUIRK_IRQ_STATUS_READ BIT(0)
#define TRF7970A_QUIRK_EN2_MUST_STAY_LOW BIT(1)
-#define TRF7970A_QUIRK_T5T_RMB_EXTRA_BYTE BIT(2)
/* Direct commands */
#define TRF7970A_CMD_IDLE 0x00
#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_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)
u8 md_rf_tech;
u8 tx_cmd;
bool issue_eof;
- bool adjust_resp_len;
- int en2_gpio;
- int en_gpio;
+ struct gpio_desc *en_gpiod;
+ struct gpio_desc *en2_gpiod;
struct mutex lock;
unsigned int timeout;
bool ignore_timeout;
struct delayed_work timeout_work;
};
-
static int trf7970a_cmd(struct trf7970a *trf, u8 opcode)
{
u8 cmd = TRF7970A_CMD_BIT_CTRL | TRF7970A_CMD_BIT_OPCODE(opcode);
ret = spi_write(trf->spi, &cmd, 1);
if (ret)
dev_err(trf->dev, "%s - cmd: 0x%x, ret: %d\n", __func__, cmd,
- ret);
+ ret);
return ret;
}
ret = spi_write_then_read(trf->spi, &addr, 1, val, 1);
if (ret)
dev_err(trf->dev, "%s - addr: 0x%x, ret: %d\n", __func__, addr,
- ret);
+ ret);
dev_dbg(trf->dev, "read(0x%x): 0x%x\n", addr, *val);
return ret;
}
-static int trf7970a_read_cont(struct trf7970a *trf, u8 reg, u8 *buf, size_t len)
+static int trf7970a_read_cont(struct trf7970a *trf, u8 reg, u8 *buf,
+ size_t len)
{
u8 addr = reg | TRF7970A_CMD_BIT_RW | TRF7970A_CMD_BIT_CONTINUOUS;
struct spi_transfer t[2];
ret = spi_sync(trf->spi, &m);
if (ret)
dev_err(trf->dev, "%s - addr: 0x%x, ret: %d\n", __func__, addr,
- ret);
+ ret);
return ret;
}
ret = spi_write(trf->spi, buf, 2);
if (ret)
dev_err(trf->dev, "%s - write: 0x%x 0x%x, ret: %d\n", __func__,
- buf[0], buf[1], ret);
+ buf[0], buf[1], ret);
return ret;
}
if (ret)
dev_err(trf->dev, "%s - irqstatus: Status read failed: %d\n",
- __func__, ret);
+ __func__, ret);
else
*status = buf[0];
u8 addr;
addr = TRF79070A_NFC_TARGET_PROTOCOL | TRF7970A_CMD_BIT_RW |
- TRF7970A_CMD_BIT_CONTINUOUS;
+ 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);
+ __func__, ret);
else
*target_proto = buf[0];
break;
default:
dev_dbg(trf->dev, "%s - mode_detect: target_proto: 0x%x\n",
- __func__, target_proto);
+ __func__, target_proto);
return -EIO;
}
if (trf->rx_skb && !IS_ERR(trf->rx_skb) && !trf->aborting)
print_hex_dump_debug("trf7970a rx data: ", DUMP_PREFIX_NONE,
- 16, 1, trf->rx_skb->data, trf->rx_skb->len,
- false);
+ 16, 1, trf->rx_skb->data, trf->rx_skb->len,
+ false);
trf->state = TRF7970A_ST_IDLE;
trf->aborting = false;
}
- if (trf->adjust_resp_len) {
- if (trf->rx_skb)
- skb_trim(trf->rx_skb, trf->rx_skb->len - 1);
-
- trf->adjust_resp_len = false;
- }
-
trf->cb(trf->ddev, trf->cb_arg, trf->rx_skb);
trf->rx_skb = NULL;
}
static int trf7970a_transmit(struct trf7970a *trf, struct sk_buff *skb,
- unsigned int len, u8 *prefix, unsigned int prefix_len)
+ unsigned int len, u8 *prefix,
+ unsigned int prefix_len)
{
struct spi_transfer t[2];
struct spi_message m;
int ret;
print_hex_dump_debug("trf7970a tx data: ", DUMP_PREFIX_NONE,
- 16, 1, skb->data, len, false);
+ 16, 1, skb->data, len, false);
spi_message_init(&m);
ret = spi_sync(trf->spi, &m);
if (ret) {
dev_err(trf->dev, "%s - Can't send tx data: %d\n", __func__,
- ret);
+ ret);
return ret;
}
}
dev_dbg(trf->dev, "Setting timeout for %d ms, state: %d\n", timeout,
- trf->state);
+ trf->state);
schedule_delayed_work(&trf->timeout_work, msecs_to_jiffies(timeout));
if (fifo_bytes > skb_tailroom(skb)) {
skb = skb_copy_expand(skb, skb_headroom(skb),
- max_t(int, fifo_bytes,
- TRF7970A_RX_SKB_ALLOC_SIZE),
- GFP_KERNEL);
+ max_t(int, fifo_bytes,
+ TRF7970A_RX_SKB_ALLOC_SIZE),
+ GFP_KERNEL);
if (!skb) {
trf7970a_send_err_upstream(trf, -ENOMEM);
return;
}
ret = trf7970a_read_cont(trf, TRF7970A_FIFO_IO_REGISTER,
- skb_put(skb, fifo_bytes), fifo_bytes);
+ skb_put(skb, fifo_bytes), fifo_bytes);
if (ret) {
trf7970a_send_err_upstream(trf, ret);
return;
/* If received Type 2 ACK/NACK, shift right 4 bits and pass up */
if ((trf->framing == NFC_DIGITAL_FRAMING_NFCA_T2T) && (skb->len == 1) &&
- (trf->special_fcn_reg1 ==
- TRF7970A_SPECIAL_FCN_REG1_4_BIT_RX)) {
+ (trf->special_fcn_reg1 == TRF7970A_SPECIAL_FCN_REG1_4_BIT_RX)) {
skb->data[0] >>= 4;
status = TRF7970A_IRQ_STATUS_SRX;
} else {
}
no_rx_data:
- if (status == TRF7970A_IRQ_STATUS_SRX) { /* Receive complete */
+ if (status == TRF7970A_IRQ_STATUS_SRX) { /* Receive complete */
trf7970a_send_upstream(trf);
return;
}
dev_dbg(trf->dev, "Setting timeout for %d ms\n",
- TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT);
+ TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT);
schedule_delayed_work(&trf->timeout_work,
- msecs_to_jiffies(TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT));
+ msecs_to_jiffies(TRF7970A_WAIT_FOR_RX_DATA_TIMEOUT));
}
static irqreturn_t trf7970a_irq(int irq, void *dev_id)
}
dev_dbg(trf->dev, "IRQ - state: %d, status: 0x%x\n", trf->state,
- status);
+ status);
if (!status) {
mutex_unlock(&trf->lock);
case TRF7970A_ST_WAIT_FOR_TX_FIFO:
if (status & TRF7970A_IRQ_STATUS_TX) {
trf->ignore_timeout =
- !cancel_delayed_work(&trf->timeout_work);
+ !cancel_delayed_work(&trf->timeout_work);
trf7970a_fill_fifo(trf);
} else {
trf7970a_send_err_upstream(trf, -EIO);
case TRF7970A_ST_WAIT_FOR_RX_DATA_CONT:
if (status & TRF7970A_IRQ_STATUS_SRX) {
trf->ignore_timeout =
- !cancel_delayed_work(&trf->timeout_work);
+ !cancel_delayed_work(&trf->timeout_work);
trf7970a_drain_fifo(trf, status);
} else if (status & TRF7970A_IRQ_STATUS_FIFO) {
ret = trf7970a_read(trf, TRF7970A_FIFO_STATUS,
- &fifo_bytes);
+ &fifo_bytes);
fifo_bytes &= ~TRF7970A_FIFO_STATUS_OVERFLOW;
else if (!fifo_bytes)
trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
} else if ((status == TRF7970A_IRQ_STATUS_TX) ||
- (!trf->is_initiator &&
- (status == (TRF7970A_IRQ_STATUS_TX |
- TRF7970A_IRQ_STATUS_NFC_RF)))) {
+ (!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->ignore_timeout =
+ !cancel_delayed_work(&trf->timeout_work);
trf->rx_skb = ERR_PTR(0);
trf7970a_send_upstream(trf);
break;
break;
case NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE:
ret = trf7970a_write(trf,
- TRF7970A_SPECIAL_FCN_REG1,
- TRF7970A_SPECIAL_FCN_REG1_14_ANTICOLL);
+ 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;
+ TRF7970A_SPECIAL_FCN_REG1_14_ANTICOLL;
break;
default:
break;
if (iso_ctrl != trf->iso_ctrl) {
ret = trf7970a_write(trf, TRF7970A_ISO_CTRL,
- iso_ctrl);
+ iso_ctrl);
if (ret)
goto err_unlock_exit;
case TRF7970A_ST_LISTENING:
if (status & TRF7970A_IRQ_STATUS_SRX) {
trf->ignore_timeout =
- !cancel_delayed_work(&trf->timeout_work);
+ !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);
case TRF7970A_ST_LISTENING_MD:
if (status & TRF7970A_IRQ_STATUS_SRX) {
trf->ignore_timeout =
- !cancel_delayed_work(&trf->timeout_work);
+ !cancel_delayed_work(&trf->timeout_work);
ret = trf7970a_mode_detect(trf, &trf->md_rf_tech);
if (ret) {
break;
default:
dev_err(trf->dev, "%s - Driver in invalid state: %d\n",
- __func__, trf->state);
+ __func__, trf->state);
}
err_unlock_exit:
trf->state = TRF7970A_ST_WAIT_FOR_RX_DATA;
dev_dbg(trf->dev, "Setting timeout for %d ms, state: %d\n",
- trf->timeout, trf->state);
+ trf->timeout, trf->state);
schedule_delayed_work(&trf->timeout_work,
- msecs_to_jiffies(trf->timeout));
+ msecs_to_jiffies(trf->timeout));
}
static void trf7970a_timeout_work_handler(struct work_struct *work)
{
struct trf7970a *trf = container_of(work, struct trf7970a,
- timeout_work.work);
+ timeout_work.work);
dev_dbg(trf->dev, "Timeout - state: %d, ignore_timeout: %d\n",
- trf->state, trf->ignore_timeout);
+ trf->state, trf->ignore_timeout);
mutex_lock(&trf->lock);
goto err_out;
ret = trf7970a_write(trf, TRF7970A_REG_IO_CTRL,
- trf->io_ctrl | TRF7970A_REG_IO_CTRL_VRS(0x1));
+ trf->io_ctrl | TRF7970A_REG_IO_CTRL_VRS(0x1));
if (ret)
goto err_out;
trf->chip_status_ctrl &= ~TRF7970A_CHIP_STATUS_RF_ON;
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
- trf->modulator_sys_clk_ctrl);
+ trf->modulator_sys_clk_ctrl);
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);
+ TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_96 |
+ TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_32);
if (ret)
goto err_out;
static void trf7970a_switch_rf_off(struct trf7970a *trf)
{
if ((trf->state == TRF7970A_ST_PWR_OFF) ||
- (trf->state == TRF7970A_ST_RF_OFF))
+ (trf->state == TRF7970A_ST_RF_OFF))
return;
dev_dbg(trf->dev, "Switching rf off\n");
pm_runtime_get_sync(trf->dev);
- if (trf->state != TRF7970A_ST_RF_OFF) { /* Power on, RF off */
+ if (trf->state != TRF7970A_ST_RF_OFF) { /* Power on, RF off */
dev_err(trf->dev, "%s - Incorrect state: %d\n", __func__,
- trf->state);
+ trf->state);
return -EINVAL;
}
break;
default:
dev_err(trf->dev, "%s - Invalid request: %d %d\n",
- __func__, trf->state, on);
+ __func__, trf->state, on);
trf7970a_switch_rf_off(trf);
ret = -EINVAL;
}
break;
default:
dev_err(trf->dev, "%s - Invalid request: %d %d\n",
- __func__, trf->state, on);
+ __func__, trf->state, on);
ret = -EINVAL;
/* FALLTHROUGH */
case TRF7970A_ST_IDLE:
case NFC_DIGITAL_RF_TECH_106A:
trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_14443A_106;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_OOK;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ TRF7970A_MODULATOR_DEPTH_OOK;
trf->guard_time = TRF7970A_GUARD_TIME_NFCA;
break;
case NFC_DIGITAL_RF_TECH_106B:
trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_14443B_106;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_ASK10;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ TRF7970A_MODULATOR_DEPTH_ASK10;
trf->guard_time = TRF7970A_GUARD_TIME_NFCB;
break;
case NFC_DIGITAL_RF_TECH_212F:
trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_FELICA_212;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_ASK10;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ TRF7970A_MODULATOR_DEPTH_ASK10;
trf->guard_time = TRF7970A_GUARD_TIME_NFCF;
break;
case NFC_DIGITAL_RF_TECH_424F:
trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_FELICA_424;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_ASK10;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ TRF7970A_MODULATOR_DEPTH_ASK10;
trf->guard_time = TRF7970A_GUARD_TIME_NFCF;
break;
case NFC_DIGITAL_RF_TECH_ISO15693:
trf->iso_ctrl_tech = TRF7970A_ISO_CTRL_15693_SGL_1OF4_2648;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_OOK;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ TRF7970A_MODULATOR_DEPTH_OOK;
trf->guard_time = TRF7970A_GUARD_TIME_15693;
break;
default:
u8 rssi;
ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
- trf->chip_status_ctrl | TRF7970A_CHIP_STATUS_REC_ON);
+ trf->chip_status_ctrl |
+ TRF7970A_CHIP_STATUS_REC_ON);
if (ret)
return ret;
return ret;
ret = trf7970a_write(trf, TRF7970A_CHIP_STATUS_CTRL,
- trf->chip_status_ctrl);
+ trf->chip_status_ctrl);
if (ret)
return ret;
trf->iso_ctrl = iso_ctrl;
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
- trf->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);
+ trf->chip_status_ctrl |
+ TRF7970A_CHIP_STATUS_RF_ON);
if (ret)
return ret;
}
static int trf7970a_in_configure_hw(struct nfc_digital_dev *ddev, int type,
- int param)
+ int param)
{
struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
int ret;
trf->is_initiator = true;
if ((trf->state == TRF7970A_ST_PWR_OFF) ||
- (trf->state == TRF7970A_ST_RF_OFF)) {
+ (trf->state == TRF7970A_ST_RF_OFF)) {
ret = trf7970a_switch_rf_on(trf);
if (ret)
goto err_unlock;
* has to send an EOF in order to get a response.
*/
if ((trf->technology == NFC_DIGITAL_RF_TECH_106A) &&
- (trf->framing == NFC_DIGITAL_FRAMING_NFCA_T2T)) {
+ (trf->framing == NFC_DIGITAL_FRAMING_NFCA_T2T)) {
if (req[0] == NFC_T2T_CMD_READ)
special_fcn_reg1 = 0;
else
if (special_fcn_reg1 != trf->special_fcn_reg1) {
ret = trf7970a_write(trf, TRF7970A_SPECIAL_FCN_REG1,
- special_fcn_reg1);
+ special_fcn_reg1);
if (ret)
return ret;
iso_ctrl |= TRF7970A_ISO_CTRL_15693_SGL_1OF4_2648;
break;
case (ISO15693_REQ_FLAG_SUB_CARRIER |
- ISO15693_REQ_FLAG_DATA_RATE):
+ ISO15693_REQ_FLAG_DATA_RATE):
iso_ctrl |= TRF7970A_ISO_CTRL_15693_DBL_1OF4_2669;
break;
}
trf->iso_ctrl = iso_ctrl;
}
- if (trf->framing == NFC_DIGITAL_FRAMING_ISO15693_T5T) {
- if (trf7970a_is_iso15693_write_or_lock(req[1]) &&
- (req[0] & ISO15693_REQ_FLAG_OPTION))
- trf->issue_eof = true;
- else if ((trf->quirks &
- TRF7970A_QUIRK_T5T_RMB_EXTRA_BYTE) &&
- (req[1] == ISO15693_CMD_READ_MULTIPLE_BLOCK))
- trf->adjust_resp_len = true;
- }
+ if ((trf->framing == NFC_DIGITAL_FRAMING_ISO15693_T5T) &&
+ trf7970a_is_iso15693_write_or_lock(req[1]) &&
+ (req[0] & ISO15693_REQ_FLAG_OPTION))
+ trf->issue_eof = true;
}
return 0;
}
static int trf7970a_send_cmd(struct nfc_digital_dev *ddev,
- struct sk_buff *skb, u16 timeout,
- nfc_digital_cmd_complete_t cb, void *arg)
+ struct sk_buff *skb, u16 timeout,
+ nfc_digital_cmd_complete_t cb, void *arg)
{
struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
u8 prefix[5];
u8 status;
dev_dbg(trf->dev, "New request - state: %d, timeout: %d ms, len: %d\n",
- trf->state, timeout, skb->len);
+ trf->state, timeout, skb->len);
if (skb->len > TRF7970A_TX_MAX)
return -EINVAL;
mutex_lock(&trf->lock);
if ((trf->state != TRF7970A_ST_IDLE) &&
- (trf->state != TRF7970A_ST_IDLE_RX_BLOCKED)) {
+ (trf->state != TRF7970A_ST_IDLE_RX_BLOCKED)) {
dev_err(trf->dev, "%s - Bogus state: %d\n", __func__,
- trf->state);
+ trf->state);
ret = -EIO;
goto out_err;
}
if (timeout) {
trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE,
- GFP_KERNEL);
+ GFP_KERNEL);
if (!trf->rx_skb) {
dev_dbg(trf->dev, "Can't alloc rx_skb\n");
ret = -ENOMEM;
* That totals 5 bytes.
*/
prefix[0] = TRF7970A_CMD_BIT_CTRL |
- TRF7970A_CMD_BIT_OPCODE(TRF7970A_CMD_FIFO_RESET);
+ TRF7970A_CMD_BIT_OPCODE(TRF7970A_CMD_FIFO_RESET);
prefix[1] = TRF7970A_CMD_BIT_CTRL |
- TRF7970A_CMD_BIT_OPCODE(trf->tx_cmd);
+ TRF7970A_CMD_BIT_OPCODE(trf->tx_cmd);
prefix[2] = TRF7970A_CMD_BIT_CONTINUOUS | TRF7970A_TX_LENGTH_BYTE1;
if (trf->framing == NFC_DIGITAL_FRAMING_NFCA_SHORT) {
prefix[3] = 0x00;
- prefix[4] = 0x0f; /* 7 bits */
+ prefix[4] = 0x0f; /* 7 bits */
} else {
prefix[3] = (len & 0xf00) >> 4;
prefix[3] |= ((len & 0xf0) >> 4);
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;
+ TRF7970A_ISO_CTRL_NFC_CE | TRF7970A_ISO_CTRL_NFC_CE_14443A;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_OOK;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ 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;
+ TRF7970A_ISO_CTRL_NFC_NFCF_212;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_ASK10;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ 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;
+ TRF7970A_ISO_CTRL_NFC_NFCF_424;
trf->modulator_sys_clk_ctrl =
- (trf->modulator_sys_clk_ctrl & 0xf8) |
- TRF7970A_MODULATOR_DEPTH_ASK10;
+ (trf->modulator_sys_clk_ctrl & 0xf8) |
+ TRF7970A_MODULATOR_DEPTH_ASK10;
break;
default:
dev_dbg(trf->dev, "Unsupported rf technology: %d\n", tech);
* here.
*/
if ((trf->framing == NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED) &&
- (trf->iso_ctrl_tech != trf->iso_ctrl)) {
+ (trf->iso_ctrl_tech != trf->iso_ctrl)) {
ret = trf7970a_write(trf, TRF7970A_ISO_CTRL,
- trf->iso_ctrl_tech);
+ trf->iso_ctrl_tech);
trf->iso_ctrl = trf->iso_ctrl_tech;
}
trf->iso_ctrl = iso_ctrl;
ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,
- trf->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);
+ trf->chip_status_ctrl |
+ TRF7970A_CHIP_STATUS_RF_ON);
if (ret)
return ret;
}
static int trf7970a_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
- int param)
+ int param)
{
struct trf7970a *trf = nfc_digital_get_drvdata(ddev);
int ret;
trf->is_initiator = false;
if ((trf->state == TRF7970A_ST_PWR_OFF) ||
- (trf->state == TRF7970A_ST_RF_OFF)) {
+ (trf->state == TRF7970A_ST_RF_OFF)) {
ret = trf7970a_switch_rf_on(trf);
if (ret)
goto err_unlock;
}
static int _trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,
- nfc_digital_cmd_complete_t cb, void *arg, bool mode_detect)
+ 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)) {
+ (trf->state != TRF7970A_ST_IDLE_RX_BLOCKED)) {
dev_err(trf->dev, "%s - Bogus state: %d\n", __func__,
- trf->state);
+ trf->state);
ret = -EIO;
goto out_err;
}
}
trf->rx_skb = nfc_alloc_recv_skb(TRF7970A_RX_SKB_ALLOC_SIZE,
- GFP_KERNEL);
+ GFP_KERNEL);
if (!trf->rx_skb) {
dev_dbg(trf->dev, "Can't alloc rx_skb\n");
ret = -ENOMEM;
}
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);
+ 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;
ret = trf7970a_write(trf, TRF7970A_REG_IO_CTRL,
- trf->io_ctrl | TRF7970A_REG_IO_CTRL_VRS(0x1));
+ trf->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));
+ 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));
+ TRF7970A_NFC_TARGET_LEVEL_RFDET(0x7));
if (ret)
goto out_err;
}
static int trf7970a_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,
- nfc_digital_cmd_complete_t cb, void *arg)
+ 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);
+ 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)
+ 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);
+ trf->state, timeout);
ret = trf7970a_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
- NFC_DIGITAL_RF_TECH_106A);
+ 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);
+ NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
if (ret)
return ret;
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);
+ trf->state, trf->md_rf_tech);
*rf_tech = trf->md_rf_tech;
usleep_range(5000, 6000);
- if (!(trf->quirks & TRF7970A_QUIRK_EN2_MUST_STAY_LOW)) {
- if (gpio_is_valid(trf->en2_gpio)) {
- gpio_set_value(trf->en2_gpio, 1);
- usleep_range(1000, 2000);
- }
+ if (trf->en2_gpiod &&
+ !(trf->quirks & TRF7970A_QUIRK_EN2_MUST_STAY_LOW)) {
+ gpiod_set_value_cansleep(trf->en2_gpiod, 1);
+ usleep_range(1000, 2000);
}
- gpio_set_value(trf->en_gpio, 1);
+ gpiod_set_value_cansleep(trf->en_gpiod, 1);
usleep_range(20000, 21000);
if (trf->state != TRF7970A_ST_RF_OFF) {
dev_dbg(trf->dev, "Can't power down - not RF_OFF state (%d)\n",
- trf->state);
+ trf->state);
return -EBUSY;
}
- gpio_set_value(trf->en_gpio, 0);
- if (gpio_is_valid(trf->en2_gpio))
- gpio_set_value(trf->en2_gpio, 0);
+ gpiod_set_value_cansleep(trf->en_gpiod, 0);
+
+ if (trf->en2_gpiod && !(trf->quirks & TRF7970A_QUIRK_EN2_MUST_STAY_LOW))
+ gpiod_set_value_cansleep(trf->en2_gpiod, 0);
ret = regulator_disable(trf->regulator);
if (ret)
dev_err(trf->dev, "%s - Can't disable VIN: %d\n", __func__,
- ret);
+ ret);
trf->state = TRF7970A_ST_PWR_OFF;
return autosuspend_delay;
}
-static int trf7970a_get_vin_voltage_override(struct device_node *np,
- u32 *vin_uvolts)
-{
- return of_property_read_u32(np, "vin-voltage-override", vin_uvolts);
-}
-
static int trf7970a_probe(struct spi_device *spi)
{
struct device_node *np = spi->dev.of_node;
return ret;
}
- if (of_property_read_bool(np, "t5t-rmb-extra-byte-quirk"))
- trf->quirks |= TRF7970A_QUIRK_T5T_RMB_EXTRA_BYTE;
-
if (of_property_read_bool(np, "irq-status-read-quirk"))
trf->quirks |= TRF7970A_QUIRK_IRQ_STATUS_READ;
- /* There are two enable pins - both must be present */
- trf->en_gpio = of_get_named_gpio(np, "ti,enable-gpios", 0);
- if (!gpio_is_valid(trf->en_gpio)) {
+ /* There are two enable pins - only EN must be present in the DT */
+ trf->en_gpiod = devm_gpiod_get_index(trf->dev, "ti,enable", 0,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(trf->en_gpiod)) {
dev_err(trf->dev, "No EN GPIO property\n");
- return trf->en_gpio;
+ return PTR_ERR(trf->en_gpiod);
}
- ret = devm_gpio_request_one(trf->dev, trf->en_gpio,
- GPIOF_DIR_OUT | GPIOF_INIT_LOW, "trf7970a EN");
- if (ret) {
- dev_err(trf->dev, "Can't request EN GPIO: %d\n", ret);
- return ret;
- }
-
- trf->en2_gpio = of_get_named_gpio(np, "ti,enable-gpios", 1);
- if (!gpio_is_valid(trf->en2_gpio)) {
+ trf->en2_gpiod = devm_gpiod_get_index_optional(trf->dev, "ti,enable", 1,
+ GPIOD_OUT_LOW);
+ if (!trf->en2_gpiod) {
dev_info(trf->dev, "No EN2 GPIO property\n");
- } else {
- ret = devm_gpio_request_one(trf->dev, trf->en2_gpio,
- GPIOF_DIR_OUT | GPIOF_INIT_LOW, "trf7970a EN2");
- if (ret) {
- dev_err(trf->dev, "Can't request EN2 GPIO: %d\n", ret);
- return ret;
- }
+ } else if (IS_ERR(trf->en2_gpiod)) {
+ dev_err(trf->dev, "Error getting EN2 GPIO property: %ld\n",
+ PTR_ERR(trf->en2_gpiod));
+ return PTR_ERR(trf->en2_gpiod);
+ } else if (of_property_read_bool(np, "en2-rf-quirk")) {
+ trf->quirks |= TRF7970A_QUIRK_EN2_MUST_STAY_LOW;
}
of_property_read_u32(np, "clock-frequency", &clk_freq);
- if ((clk_freq != TRF7970A_27MHZ_CLOCK_FREQUENCY) ||
- (clk_freq != TRF7970A_13MHZ_CLOCK_FREQUENCY)) {
+ if ((clk_freq != TRF7970A_27MHZ_CLOCK_FREQUENCY) &&
+ (clk_freq != TRF7970A_13MHZ_CLOCK_FREQUENCY)) {
dev_err(trf->dev,
- "clock-frequency (%u Hz) unsupported\n",
- clk_freq);
+ "clock-frequency (%u Hz) unsupported\n", clk_freq);
return -EINVAL;
}
- if (of_property_read_bool(np, "en2-rf-quirk"))
- trf->quirks |= TRF7970A_QUIRK_EN2_MUST_STAY_LOW;
+ if (clk_freq == TRF7970A_27MHZ_CLOCK_FREQUENCY) {
+ trf->modulator_sys_clk_ctrl = TRF7970A_MODULATOR_27MHZ;
+ dev_dbg(trf->dev, "trf7970a configured for 27MHz crystal\n");
+ } else {
+ trf->modulator_sys_clk_ctrl = 0;
+ }
ret = devm_request_threaded_irq(trf->dev, spi->irq, NULL,
- trf7970a_irq, IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- "trf7970a", trf);
+ trf7970a_irq,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "trf7970a", trf);
if (ret) {
dev_err(trf->dev, "Can't request IRQ#%d: %d\n", spi->irq, ret);
return ret;
goto err_destroy_lock;
}
- ret = trf7970a_get_vin_voltage_override(np, &uvolts);
- if (ret)
- uvolts = regulator_get_voltage(trf->regulator);
-
+ uvolts = regulator_get_voltage(trf->regulator);
if (uvolts > 4000000)
trf->chip_status_ctrl = TRF7970A_CHIP_STATUS_VRS5_3;
}
trf->ddev = nfc_digital_allocate_device(&trf7970a_nfc_ops,
- TRF7970A_SUPPORTED_PROTOCOLS,
- NFC_DIGITAL_DRV_CAPS_IN_CRC |
- NFC_DIGITAL_DRV_CAPS_TG_CRC, 0, 0);
+ TRF7970A_SUPPORTED_PROTOCOLS,
+ 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;
ret = nfc_digital_register_device(trf->ddev);
if (ret) {
dev_err(trf->dev, "Can't register NFC digital device: %d\n",
- ret);
+ ret);
goto err_shutdown;
}
static const struct dev_pm_ops trf7970a_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(trf7970a_suspend, trf7970a_resume)
SET_RUNTIME_PM_OPS(trf7970a_pm_runtime_suspend,
- trf7970a_pm_runtime_resume, NULL)
+ trf7970a_pm_runtime_resume, NULL)
};
static const struct of_device_id trf7970a_of_match[] = {
- { .compatible = "ti,trf7970a", },
- { /* sentinel */ },
+ {.compatible = "ti,trf7970a",},
+ {},
};
+
MODULE_DEVICE_TABLE(of, trf7970a_of_match);
static const struct spi_device_id trf7970a_id_table[] = {
- { "trf7970a", 0 },
- { }
+ {"trf7970a", 0},
+ {}
};
+
MODULE_DEVICE_TABLE(spi, trf7970a_id_table);
static struct spi_driver trf7970a_spi_driver = {
.probe = trf7970a_probe,
.remove = trf7970a_remove,
.id_table = trf7970a_id_table,
- .driver = {
- .name = "trf7970a",
- .of_match_table = of_match_ptr(trf7970a_of_match),
- .pm = &trf7970a_pm_ops,
+ .driver = {
+ .name = "trf7970a",
+ .of_match_table = of_match_ptr(trf7970a_of_match),
+ .pm = &trf7970a_pm_ops,
},
};
projects / mirror_ubuntu-bionic-kernel.git / blobdiff