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Commit d2e8590f authored by Lech Perczak's avatar Lech Perczak Committed by Greg Kroah-Hartman
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serial: sc16is7xx: convert bitmask definitions to use BIT() macro 

Now that bit definition comments were cleaned up, convert bitmask
definitions to use BIT() macro for clarity.
Convert SC16IS7XX_IIR_ID_MASK to use GENMASK() macro -
- while at that, realign comments.
Compose SC16IS7XX_LSR_BRK_ERROR_MASK using aforementioned constants,
instead of open-coding it, and remove now unneeded comments.
Signed-off-by: default avatarLech Perczak <lech.perczak@camlingroup.com>
Reviewed-by: default avatarAndy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/8b45a01e-7cc5-4d53-b467-c6680bc51ef4@camlingroup.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent eccdb0fd
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Showing with 91 additions and 85 deletions
drivers/tty/serial/sc16is7xx.c
View file @ d2e8590f
......@@ -10,6 +10,7 @@
#undef DEFAULT_SYMBOL_NAMESPACE
#define DEFAULT_SYMBOL_NAMESPACE SERIAL_NXP_SC16IS7XX
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
......@@ -78,52 +79,52 @@
#define SC16IS7XX_XOFF2_REG (0x07) /* Xoff2 word */
/* IER register bits */
#define SC16IS7XX_IER_RDI_BIT (1 << 0) /* Enable RX data interrupt */
#define SC16IS7XX_IER_THRI_BIT (1 << 1) /* Enable TX holding register
#define SC16IS7XX_IER_RDI_BIT BIT(0) /* Enable RX data interrupt */
#define SC16IS7XX_IER_THRI_BIT BIT(1) /* Enable TX holding register
* interrupt */
#define SC16IS7XX_IER_RLSI_BIT (1 << 2) /* Enable RX line status
#define SC16IS7XX_IER_RLSI_BIT BIT(2) /* Enable RX line status
* interrupt */
#define SC16IS7XX_IER_MSI_BIT (1 << 3) /* Enable Modem status
#define SC16IS7XX_IER_MSI_BIT BIT(3) /* Enable Modem status
* interrupt */
/* IER register bits - write only if (EFR[4] == 1) */
#define SC16IS7XX_IER_SLEEP_BIT (1 << 4) /* Enable Sleep mode */
#define SC16IS7XX_IER_XOFFI_BIT (1 << 5) /* Enable Xoff interrupt */
#define SC16IS7XX_IER_RTSI_BIT (1 << 6) /* Enable nRTS interrupt */
#define SC16IS7XX_IER_CTSI_BIT (1 << 7) /* Enable nCTS interrupt */
#define SC16IS7XX_IER_SLEEP_BIT BIT(4) /* Enable Sleep mode */
#define SC16IS7XX_IER_XOFFI_BIT BIT(5) /* Enable Xoff interrupt */
#define SC16IS7XX_IER_RTSI_BIT BIT(6) /* Enable nRTS interrupt */
#define SC16IS7XX_IER_CTSI_BIT BIT(7) /* Enable nCTS interrupt */
/* FCR register bits */
#define SC16IS7XX_FCR_FIFO_BIT (1 << 0) /* Enable FIFO */
#define SC16IS7XX_FCR_RXRESET_BIT (1 << 1) /* Reset RX FIFO */
#define SC16IS7XX_FCR_TXRESET_BIT (1 << 2) /* Reset TX FIFO */
#define SC16IS7XX_FCR_RXLVLL_BIT (1 << 6) /* RX Trigger level LSB */
#define SC16IS7XX_FCR_RXLVLH_BIT (1 << 7) /* RX Trigger level MSB */
#define SC16IS7XX_FCR_FIFO_BIT BIT(0) /* Enable FIFO */
#define SC16IS7XX_FCR_RXRESET_BIT BIT(1) /* Reset RX FIFO */
#define SC16IS7XX_FCR_TXRESET_BIT BIT(2) /* Reset TX FIFO */
#define SC16IS7XX_FCR_RXLVLL_BIT BIT(6) /* RX Trigger level LSB */
#define SC16IS7XX_FCR_RXLVLH_BIT BIT(7) /* RX Trigger level MSB */
/* FCR register bits - write only if (EFR[4] == 1) */
#define SC16IS7XX_FCR_TXLVLL_BIT (1 << 4) /* TX Trigger level LSB */
#define SC16IS7XX_FCR_TXLVLH_BIT (1 << 5) /* TX Trigger level MSB */
#define SC16IS7XX_FCR_TXLVLL_BIT BIT(4) /* TX Trigger level LSB */
#define SC16IS7XX_FCR_TXLVLH_BIT BIT(5) /* TX Trigger level MSB */
/* IIR register bits */
#define SC16IS7XX_IIR_NO_INT_BIT (1 << 0) /* No interrupts pending */
#define SC16IS7XX_IIR_ID_MASK 0x3e /* Mask for the interrupt ID */
#define SC16IS7XX_IIR_THRI_SRC 0x02 /* TX holding register empty */
#define SC16IS7XX_IIR_RDI_SRC 0x04 /* RX data interrupt */
#define SC16IS7XX_IIR_RLSE_SRC 0x06 /* RX line status error */
#define SC16IS7XX_IIR_RTOI_SRC 0x0c /* RX time-out interrupt */
#define SC16IS7XX_IIR_MSI_SRC 0x00 /* Modem status interrupt
* - only on 75x/76x
*/
#define SC16IS7XX_IIR_INPIN_SRC 0x30 /* Input pin change of state
* - only on 75x/76x
*/
#define SC16IS7XX_IIR_XOFFI_SRC 0x10 /* Received Xoff */
#define SC16IS7XX_IIR_CTSRTS_SRC 0x20 /* nCTS,nRTS change of state
* from active (LOW)
* to inactive (HIGH)
*/
#define SC16IS7XX_IIR_NO_INT_BIT 0x01 /* No interrupts pending */
#define SC16IS7XX_IIR_ID_MASK GENMASK(5, 1) /* Mask for the interrupt ID */
#define SC16IS7XX_IIR_THRI_SRC 0x02 /* TX holding register empty */
#define SC16IS7XX_IIR_RDI_SRC 0x04 /* RX data interrupt */
#define SC16IS7XX_IIR_RLSE_SRC 0x06 /* RX line status error */
#define SC16IS7XX_IIR_RTOI_SRC 0x0c /* RX time-out interrupt */
#define SC16IS7XX_IIR_MSI_SRC 0x00 /* Modem status interrupt
* - only on 75x/76x
*/
#define SC16IS7XX_IIR_INPIN_SRC 0x30 /* Input pin change of state
* - only on 75x/76x
*/
#define SC16IS7XX_IIR_XOFFI_SRC 0x10 /* Received Xoff */
#define SC16IS7XX_IIR_CTSRTS_SRC 0x20 /* nCTS,nRTS change of state
* from active (LOW)
* to inactive (HIGH)
*/
/* LCR register bits */
#define SC16IS7XX_LCR_LENGTH0_BIT (1 << 0) /* Word length bit 0 */
#define SC16IS7XX_LCR_LENGTH1_BIT (1 << 1) /* Word length bit 1
#define SC16IS7XX_LCR_LENGTH0_BIT BIT(0) /* Word length bit 0 */
#define SC16IS7XX_LCR_LENGTH1_BIT BIT(1) /* Word length bit 1
*
* Word length bits table:
* 00 -> 5 bit words
......@@ -131,7 +132,7 @@
* 10 -> 7 bit words
* 11 -> 8 bit words
*/
#define SC16IS7XX_LCR_STOPLEN_BIT (1 << 2) /* STOP length bit
#define SC16IS7XX_LCR_STOPLEN_BIT BIT(2) /* STOP length bit
*
* STOP length bit table:
* 0 -> 1 stop bit
......@@ -139,11 +140,11 @@
* word length is 5,
* 2 stop bits otherwise
*/
#define SC16IS7XX_LCR_PARITY_BIT (1 << 3) /* Parity bit enable */
#define SC16IS7XX_LCR_EVENPARITY_BIT (1 << 4) /* Even parity bit enable */
#define SC16IS7XX_LCR_FORCEPARITY_BIT (1 << 5) /* 9-bit multidrop parity */
#define SC16IS7XX_LCR_TXBREAK_BIT (1 << 6) /* TX break enable */
#define SC16IS7XX_LCR_DLAB_BIT (1 << 7) /* Divisor Latch enable */
#define SC16IS7XX_LCR_PARITY_BIT BIT(3) /* Parity bit enable */
#define SC16IS7XX_LCR_EVENPARITY_BIT BIT(4) /* Even parity bit enable */
#define SC16IS7XX_LCR_FORCEPARITY_BIT BIT(5) /* 9-bit multidrop parity */
#define SC16IS7XX_LCR_TXBREAK_BIT BIT(6) /* TX break enable */
#define SC16IS7XX_LCR_DLAB_BIT BIT(7) /* Divisor Latch enable */
#define SC16IS7XX_LCR_WORD_LEN_5 (0x00)
#define SC16IS7XX_LCR_WORD_LEN_6 (0x01)
#define SC16IS7XX_LCR_WORD_LEN_7 (0x02)
......@@ -154,58 +155,63 @@
* reg set */
/* MCR register bits */
#define SC16IS7XX_MCR_DTR_BIT (1 << 0) /* DTR complement
#define SC16IS7XX_MCR_DTR_BIT BIT(0) /* DTR complement
* - only on 75x/76x
*/
#define SC16IS7XX_MCR_RTS_BIT (1 << 1) /* RTS complement */
#define SC16IS7XX_MCR_TCRTLR_BIT (1 << 2) /* TCR/TLR register enable */
#define SC16IS7XX_MCR_LOOP_BIT (1 << 4) /* Enable loopback test mode */
#define SC16IS7XX_MCR_XONANY_BIT (1 << 5) /* Enable Xon Any
#define SC16IS7XX_MCR_RTS_BIT BIT(1) /* RTS complement */
#define SC16IS7XX_MCR_TCRTLR_BIT BIT(2) /* TCR/TLR register enable */
#define SC16IS7XX_MCR_LOOP_BIT BIT(4) /* Enable loopback test mode */
#define SC16IS7XX_MCR_XONANY_BIT BIT(5) /* Enable Xon Any
* - write enabled
* if (EFR[4] == 1)
*/
#define SC16IS7XX_MCR_IRDA_BIT (1 << 6) /* Enable IrDA mode
#define SC16IS7XX_MCR_IRDA_BIT BIT(6) /* Enable IrDA mode
* - write enabled
* if (EFR[4] == 1)
*/
#define SC16IS7XX_MCR_CLKSEL_BIT (1 << 7) /* Divide clock by 4
#define SC16IS7XX_MCR_CLKSEL_BIT BIT(7) /* Divide clock by 4
* - write enabled
* if (EFR[4] == 1)
*/
/* LSR register bits */
#define SC16IS7XX_LSR_DR_BIT (1 << 0) /* Receiver data ready */
#define SC16IS7XX_LSR_OE_BIT (1 << 1) /* Overrun Error */
#define SC16IS7XX_LSR_PE_BIT (1 << 2) /* Parity Error */
#define SC16IS7XX_LSR_FE_BIT (1 << 3) /* Frame Error */
#define SC16IS7XX_LSR_BI_BIT (1 << 4) /* Break Interrupt */
#define SC16IS7XX_LSR_BRK_ERROR_MASK 0x1E /* BI, FE, PE, OE bits */
#define SC16IS7XX_LSR_THRE_BIT (1 << 5) /* TX holding register empty */
#define SC16IS7XX_LSR_TEMT_BIT (1 << 6) /* Transmitter empty */
#define SC16IS7XX_LSR_FIFOE_BIT (1 << 7) /* Fifo Error */
#define SC16IS7XX_LSR_DR_BIT BIT(0) /* Receiver data ready */
#define SC16IS7XX_LSR_OE_BIT BIT(1) /* Overrun Error */
#define SC16IS7XX_LSR_PE_BIT BIT(2) /* Parity Error */
#define SC16IS7XX_LSR_FE_BIT BIT(3) /* Frame Error */
#define SC16IS7XX_LSR_BI_BIT BIT(4) /* Break Interrupt */
#define SC16IS7XX_LSR_BRK_ERROR_MASK \
(SC16IS7XX_LSR_OE_BIT | \
SC16IS7XX_LSR_PE_BIT | \
SC16IS7XX_LSR_FE_BIT | \
SC16IS7XX_LSR_BI_BIT)
#define SC16IS7XX_LSR_THRE_BIT BIT(5) /* TX holding register empty */
#define SC16IS7XX_LSR_TEMT_BIT BIT(6) /* Transmitter empty */
#define SC16IS7XX_LSR_FIFOE_BIT BIT(7) /* Fifo Error */
/* MSR register bits */
#define SC16IS7XX_MSR_DCTS_BIT (1 << 0) /* Delta CTS Clear To Send */
#define SC16IS7XX_MSR_DDSR_BIT (1 << 1) /* Delta DSR Data Set Ready
#define SC16IS7XX_MSR_DCTS_BIT BIT(0) /* Delta CTS Clear To Send */
#define SC16IS7XX_MSR_DDSR_BIT BIT(1) /* Delta DSR Data Set Ready
* or (IO4)
* - only on 75x/76x
*/
#define SC16IS7XX_MSR_DRI_BIT (1 << 2) /* Delta RI Ring Indicator
#define SC16IS7XX_MSR_DRI_BIT BIT(2) /* Delta RI Ring Indicator
* or (IO7)
* - only on 75x/76x
*/
#define SC16IS7XX_MSR_DCD_BIT (1 << 3) /* Delta CD Carrier Detect
#define SC16IS7XX_MSR_DCD_BIT BIT(3) /* Delta CD Carrier Detect
* or (IO6)
* - only on 75x/76x
*/
#define SC16IS7XX_MSR_CTS_BIT (1 << 4) /* CTS */
#define SC16IS7XX_MSR_DSR_BIT (1 << 5) /* DSR (IO4)
#define SC16IS7XX_MSR_CTS_BIT BIT(4) /* CTS */
#define SC16IS7XX_MSR_DSR_BIT BIT(5) /* DSR (IO4)
* - only on 75x/76x
*/
#define SC16IS7XX_MSR_RI_BIT (1 << 6) /* RI (IO7)
#define SC16IS7XX_MSR_RI_BIT BIT(6) /* RI (IO7)
* - only on 75x/76x
*/
#define SC16IS7XX_MSR_CD_BIT (1 << 7) /* CD (IO6)
#define SC16IS7XX_MSR_CD_BIT BIT(7) /* CD (IO6)
* - only on 75x/76x
*/
......@@ -240,19 +246,19 @@
#define SC16IS7XX_TLR_RX_TRIGGER(words) ((((words) / 4) & 0x0f) << 4)
/* IOControl register bits (Only 75x/76x) */
#define SC16IS7XX_IOCONTROL_LATCH_BIT (1 << 0) /* Enable input latching */
#define SC16IS7XX_IOCONTROL_MODEM_A_BIT (1 << 1) /* Enable GPIO[7:4] as modem A pins */
#define SC16IS7XX_IOCONTROL_MODEM_B_BIT (1 << 2) /* Enable GPIO[3:0] as modem B pins */
#define SC16IS7XX_IOCONTROL_SRESET_BIT (1 << 3) /* Software Reset */
#define SC16IS7XX_IOCONTROL_LATCH_BIT BIT(0) /* Enable input latching */
#define SC16IS7XX_IOCONTROL_MODEM_A_BIT BIT(1) /* Enable GPIO[7:4] as modem A pins */
#define SC16IS7XX_IOCONTROL_MODEM_B_BIT BIT(2) /* Enable GPIO[3:0] as modem B pins */
#define SC16IS7XX_IOCONTROL_SRESET_BIT BIT(3) /* Software Reset */
/* EFCR register bits */
#define SC16IS7XX_EFCR_9BIT_MODE_BIT (1 << 0) /* Enable 9-bit or Multidrop
#define SC16IS7XX_EFCR_9BIT_MODE_BIT BIT(0) /* Enable 9-bit or Multidrop
* mode (RS485) */
#define SC16IS7XX_EFCR_RXDISABLE_BIT (1 << 1) /* Disable receiver */
#define SC16IS7XX_EFCR_TXDISABLE_BIT (1 << 2) /* Disable transmitter */
#define SC16IS7XX_EFCR_AUTO_RS485_BIT (1 << 4) /* Auto RS485 RTS direction */
#define SC16IS7XX_EFCR_RTS_INVERT_BIT (1 << 5) /* RTS output inversion */
#define SC16IS7XX_EFCR_IRDA_MODE_BIT (1 << 7) /* IrDA mode
#define SC16IS7XX_EFCR_RXDISABLE_BIT BIT(1) /* Disable receiver */
#define SC16IS7XX_EFCR_TXDISABLE_BIT BIT(2) /* Disable transmitter */
#define SC16IS7XX_EFCR_AUTO_RS485_BIT BIT(4) /* Auto RS485 RTS direction */
#define SC16IS7XX_EFCR_RTS_INVERT_BIT BIT(5) /* RTS output inversion */
#define SC16IS7XX_EFCR_IRDA_MODE_BIT BIT(7) /* IrDA mode
* 0 = rate upto 115.2 kbit/s
* - Only 75x/76x
* 1 = rate upto 1.152 Mbit/s
......@@ -260,15 +266,15 @@
*/
/* EFR register bits */
#define SC16IS7XX_EFR_AUTORTS_BIT (1 << 6) /* Auto RTS flow ctrl enable */
#define SC16IS7XX_EFR_AUTOCTS_BIT (1 << 7) /* Auto CTS flow ctrl enable */
#define SC16IS7XX_EFR_XOFF2_DETECT_BIT (1 << 5) /* Enable Xoff2 detection */
#define SC16IS7XX_EFR_ENABLE_BIT (1 << 4) /* Enable enhanced functions
#define SC16IS7XX_EFR_AUTORTS_BIT BIT(6) /* Auto RTS flow ctrl enable */
#define SC16IS7XX_EFR_AUTOCTS_BIT BIT(7) /* Auto CTS flow ctrl enable */
#define SC16IS7XX_EFR_XOFF2_DETECT_BIT BIT(5) /* Enable Xoff2 detection */
#define SC16IS7XX_EFR_ENABLE_BIT BIT(4) /* Enable enhanced functions
* and writing to IER[7:4],
* FCR[5:4], MCR[7:5]
*/
#define SC16IS7XX_EFR_SWFLOW3_BIT (1 << 3)
#define SC16IS7XX_EFR_SWFLOW2_BIT (1 << 2)
#define SC16IS7XX_EFR_SWFLOW3_BIT BIT(3)
#define SC16IS7XX_EFR_SWFLOW2_BIT BIT(2)
/*
* SWFLOW bits 3 & 2 table:
* 00 -> no transmitter flow
......@@ -281,8 +287,8 @@
* XON1, XON2, XOFF1 and
* XOFF2
*/
#define SC16IS7XX_EFR_SWFLOW1_BIT (1 << 1)
#define SC16IS7XX_EFR_SWFLOW0_BIT (1 << 0)
#define SC16IS7XX_EFR_SWFLOW1_BIT BIT(1)
#define SC16IS7XX_EFR_SWFLOW0_BIT BIT(0)
/*
* SWFLOW bits 1 & 0 table:
* 00 -> no received flow
......@@ -308,9 +314,9 @@
#define SC16IS7XX_FIFO_SIZE (64)
#define SC16IS7XX_GPIOS_PER_BANK 4
#define SC16IS7XX_RECONF_MD (1 << 0)
#define SC16IS7XX_RECONF_IER (1 << 1)
#define SC16IS7XX_RECONF_RS485 (1 << 2)
#define SC16IS7XX_RECONF_MD BIT(0)
#define SC16IS7XX_RECONF_IER BIT(1)
#define SC16IS7XX_RECONF_RS485 BIT(2)
struct sc16is7xx_one_config {
unsigned int flags;
......
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