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Commit f6544418 authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Greg Kroah-Hartman
Browse files

serial: New serial driver MAX310X 



This driver is a replacement for a MAX3107 driver with a lot of
improvements and new features.
The main differences from the old version:
- Using the regmap.
- Using devm_XXX-related functions.
- The use of threaded IRQ with IRQF_ONESHOT flag allows the driver to
  the hardware that supports only level IRQ.
- Improved error handling of serial port, improved FIFO handling,
  improved hardware & software flow control.
- Advanced flags allows turn on RS-485 mode (Auto direction control).
- Ability to load multiple instances of drivers.
- Added support for MAX3108.
- GPIO support.
- Driver is quite ready for adding I2C support and support other ICs
  with compatible registers set (MAX3109, MAX14830).

Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9574f36f

drivers/tty/serial/Kconfig

+10 −3
Original line number Diff line number Diff line
@@ -257,12 +257,19 @@ config SERIAL_MAX3100 
	help

	  MAX3100 chip support



config SERIAL_MAX3107

	tristate "MAX3107 support"

config SERIAL_MAX310X

	bool "MAX310X support"

	depends on SPI

	select SERIAL_CORE

	select REGMAP_SPI if SPI

	default n

	help

	  MAX3107 chip support

	  This selects support for an advanced UART from Maxim (Dallas).

	  Supported ICs are MAX3107, MAX3108.

	  Each IC contains 128 words each of receive and transmit FIFO

	  that can be controlled through I2C or high-speed SPI.



	  Say Y here if you want to support this ICs.



config SERIAL_DZ

	bool "DECstation DZ serial driver"

drivers/tty/serial/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -28,7 +28,7 @@ obj-$(CONFIG_SERIAL_BFIN) += bfin_uart.o 
obj-$(CONFIG_SERIAL_BFIN_SPORT) += bfin_sport_uart.o

obj-$(CONFIG_SERIAL_SAMSUNG) += samsung.o

obj-$(CONFIG_SERIAL_MAX3100) += max3100.o

obj-$(CONFIG_SERIAL_MAX3107) += max3107.o

obj-$(CONFIG_SERIAL_MAX310X) += max310x.o

obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o

obj-$(CONFIG_SERIAL_MUX) += mux.o

obj-$(CONFIG_SERIAL_68328) += 68328serial.o

drivers/tty/serial/max3107.c

deleted100644 → 0
+0 −1215

File deleted.

Preview size limit exceeded, changes collapsed.

drivers/tty/serial/max3107.h

deleted100644 → 0
+0 −441
Original line number Diff line number Diff line 
/*

 * max3107.h - spi uart protocol driver header for Maxim 3107

 *

 * Copyright (C) Aavamobile 2009

 * Based on serial_max3100.h by Christian Pellegrin

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */



#ifndef _MAX3107_H

#define _MAX3107_H



/* Serial error status definitions */

#define MAX3107_PARITY_ERROR	1

#define MAX3107_FRAME_ERROR	2

#define MAX3107_OVERRUN_ERROR	4

#define MAX3107_ALL_ERRORS	(MAX3107_PARITY_ERROR | \

				 MAX3107_FRAME_ERROR | \

				 MAX3107_OVERRUN_ERROR)



/* GPIO definitions */

#define MAX3107_GPIO_BASE	88

#define MAX3107_GPIO_COUNT	4





/* GPIO connected to chip's reset pin */

#define MAX3107_RESET_GPIO	87





/* Chip reset delay */

#define MAX3107_RESET_DELAY	10



/* Chip wakeup delay */

#define MAX3107_WAKEUP_DELAY	50





/* Sleep mode definitions */

#define MAX3107_DISABLE_FORCED_SLEEP	0

#define MAX3107_ENABLE_FORCED_SLEEP	1

#define MAX3107_DISABLE_AUTOSLEEP	2

#define MAX3107_ENABLE_AUTOSLEEP	3





/* Definitions for register access with SPI transfers

 *

 * SPI transfer format:

 *

 * Master to slave bits xzzzzzzzyyyyyyyy

 * Slave to master bits aaaaaaaabbbbbbbb

 *

 * where:

 * x = 0 for reads, 1 for writes

 * z = register address

 * y = new register value if write, 0 if read

 * a = unspecified

 * b = register value if read, unspecified if write

 */



/* SPI speed */

#define MAX3107_SPI_SPEED	(3125000 * 2)



/* Write bit */

#define MAX3107_WRITE_BIT	(1 << 15)



/* SPI TX data mask */

#define MAX3107_SPI_RX_DATA_MASK	(0x00ff)



/* SPI RX data mask */

#define MAX3107_SPI_TX_DATA_MASK	(0x00ff)



/* Register access masks */

#define MAX3107_RHR_REG			(0x0000) /* RX FIFO */

#define MAX3107_THR_REG			(0x0000) /* TX FIFO */

#define MAX3107_IRQEN_REG		(0x0100) /* IRQ enable */

#define MAX3107_IRQSTS_REG		(0x0200) /* IRQ status */

#define MAX3107_LSR_IRQEN_REG		(0x0300) /* LSR IRQ enable */

#define MAX3107_LSR_IRQSTS_REG		(0x0400) /* LSR IRQ status */

#define MAX3107_SPCHR_IRQEN_REG		(0x0500) /* Special char IRQ enable */

#define MAX3107_SPCHR_IRQSTS_REG	(0x0600) /* Special char IRQ status */

#define MAX3107_STS_IRQEN_REG		(0x0700) /* Status IRQ enable */

#define MAX3107_STS_IRQSTS_REG		(0x0800) /* Status IRQ status */

#define MAX3107_MODE1_REG		(0x0900) /* MODE1 */

#define MAX3107_MODE2_REG		(0x0a00) /* MODE2 */

#define MAX3107_LCR_REG			(0x0b00) /* LCR */

#define MAX3107_RXTO_REG		(0x0c00) /* RX timeout */

#define MAX3107_HDPIXDELAY_REG		(0x0d00) /* Auto transceiver delays */

#define MAX3107_IRDA_REG		(0x0e00) /* IRDA settings */

#define MAX3107_FLOWLVL_REG		(0x0f00) /* Flow control levels */

#define MAX3107_FIFOTRIGLVL_REG		(0x1000) /* FIFO IRQ trigger levels */

#define MAX3107_TXFIFOLVL_REG		(0x1100) /* TX FIFO level */

#define MAX3107_RXFIFOLVL_REG		(0x1200) /* RX FIFO level */

#define MAX3107_FLOWCTRL_REG		(0x1300) /* Flow control */

#define MAX3107_XON1_REG		(0x1400) /* XON1 character */

#define MAX3107_XON2_REG		(0x1500) /* XON2 character */

#define MAX3107_XOFF1_REG		(0x1600) /* XOFF1 character */

#define MAX3107_XOFF2_REG		(0x1700) /* XOFF2 character */

#define MAX3107_GPIOCFG_REG		(0x1800) /* GPIO config */

#define MAX3107_GPIODATA_REG		(0x1900) /* GPIO data */

#define MAX3107_PLLCFG_REG		(0x1a00) /* PLL config */

#define MAX3107_BRGCFG_REG		(0x1b00) /* Baud rate generator conf */

#define MAX3107_BRGDIVLSB_REG		(0x1c00) /* Baud rate divisor LSB */

#define MAX3107_BRGDIVMSB_REG		(0x1d00) /* Baud rate divisor MSB */

#define MAX3107_CLKSRC_REG		(0x1e00) /* Clock source */

#define MAX3107_REVID_REG		(0x1f00) /* Revision identification */



/* IRQ register bits */

#define MAX3107_IRQ_LSR_BIT	(1 << 0) /* LSR interrupt */

#define MAX3107_IRQ_SPCHR_BIT	(1 << 1) /* Special char interrupt */

#define MAX3107_IRQ_STS_BIT	(1 << 2) /* Status interrupt */

#define MAX3107_IRQ_RXFIFO_BIT	(1 << 3) /* RX FIFO interrupt */

#define MAX3107_IRQ_TXFIFO_BIT	(1 << 4) /* TX FIFO interrupt */

#define MAX3107_IRQ_TXEMPTY_BIT	(1 << 5) /* TX FIFO empty interrupt */

#define MAX3107_IRQ_RXEMPTY_BIT	(1 << 6) /* RX FIFO empty interrupt */

#define MAX3107_IRQ_CTS_BIT	(1 << 7) /* CTS interrupt */



/* LSR register bits */

#define MAX3107_LSR_RXTO_BIT	(1 << 0) /* RX timeout */

#define MAX3107_LSR_RXOVR_BIT	(1 << 1) /* RX overrun */

#define MAX3107_LSR_RXPAR_BIT	(1 << 2) /* RX parity error */

#define MAX3107_LSR_FRERR_BIT	(1 << 3) /* Frame error */

#define MAX3107_LSR_RXBRK_BIT	(1 << 4) /* RX break */

#define MAX3107_LSR_RXNOISE_BIT	(1 << 5) /* RX noise */

#define MAX3107_LSR_UNDEF6_BIT	(1 << 6) /* Undefined/not used */

#define MAX3107_LSR_CTS_BIT	(1 << 7) /* CTS pin state */



/* Special character register bits */

#define MAX3107_SPCHR_XON1_BIT		(1 << 0) /* XON1 character */

#define MAX3107_SPCHR_XON2_BIT		(1 << 1) /* XON2 character */

#define MAX3107_SPCHR_XOFF1_BIT		(1 << 2) /* XOFF1 character */

#define MAX3107_SPCHR_XOFF2_BIT		(1 << 3) /* XOFF2 character */

#define MAX3107_SPCHR_BREAK_BIT		(1 << 4) /* RX break */

#define MAX3107_SPCHR_MULTIDROP_BIT	(1 << 5) /* 9-bit multidrop addr char */

#define MAX3107_SPCHR_UNDEF6_BIT	(1 << 6) /* Undefined/not used */

#define MAX3107_SPCHR_UNDEF7_BIT	(1 << 7) /* Undefined/not used */



/* Status register bits */

#define MAX3107_STS_GPIO0_BIT		(1 << 0) /* GPIO 0 interrupt */

#define MAX3107_STS_GPIO1_BIT		(1 << 1) /* GPIO 1 interrupt */

#define MAX3107_STS_GPIO2_BIT		(1 << 2) /* GPIO 2 interrupt */

#define MAX3107_STS_GPIO3_BIT		(1 << 3) /* GPIO 3 interrupt */

#define MAX3107_STS_UNDEF4_BIT		(1 << 4) /* Undefined/not used */

#define MAX3107_STS_CLKREADY_BIT	(1 << 5) /* Clock ready */

#define MAX3107_STS_SLEEP_BIT		(1 << 6) /* Sleep interrupt */

#define MAX3107_STS_UNDEF7_BIT		(1 << 7) /* Undefined/not used */



/* MODE1 register bits */

#define MAX3107_MODE1_RXDIS_BIT		(1 << 0) /* RX disable */

#define MAX3107_MODE1_TXDIS_BIT		(1 << 1) /* TX disable */

#define MAX3107_MODE1_TXHIZ_BIT		(1 << 2) /* TX pin three-state */

#define MAX3107_MODE1_RTSHIZ_BIT	(1 << 3) /* RTS pin three-state */

#define MAX3107_MODE1_TRNSCVCTRL_BIT	(1 << 4) /* Transceiver ctrl enable */

#define MAX3107_MODE1_FORCESLEEP_BIT	(1 << 5) /* Force sleep mode */

#define MAX3107_MODE1_AUTOSLEEP_BIT	(1 << 6) /* Auto sleep enable */

#define MAX3107_MODE1_IRQSEL_BIT	(1 << 7) /* IRQ pin enable */



/* MODE2 register bits */

#define MAX3107_MODE2_RST_BIT		(1 << 0) /* Chip reset */

#define MAX3107_MODE2_FIFORST_BIT	(1 << 1) /* FIFO reset */

#define MAX3107_MODE2_RXTRIGINV_BIT	(1 << 2) /* RX FIFO INT invert */

#define MAX3107_MODE2_RXEMPTINV_BIT	(1 << 3) /* RX FIFO empty INT invert */

#define MAX3107_MODE2_SPCHR_BIT		(1 << 4) /* Special chr detect enable */

#define MAX3107_MODE2_LOOPBACK_BIT	(1 << 5) /* Internal loopback enable */

#define MAX3107_MODE2_MULTIDROP_BIT	(1 << 6) /* 9-bit multidrop enable */

#define MAX3107_MODE2_ECHOSUPR_BIT	(1 << 7) /* ECHO suppression enable */



/* LCR register bits */

#define MAX3107_LCR_LENGTH0_BIT		(1 << 0) /* Word length bit 0 */

#define MAX3107_LCR_LENGTH1_BIT		(1 << 1) /* Word length bit 1

						  *

						  * Word length bits table:

						  * 00 -> 5 bit words

						  * 01 -> 6 bit words

						  * 10 -> 7 bit words

						  * 11 -> 8 bit words

						  */

#define MAX3107_LCR_STOPLEN_BIT		(1 << 2) /* STOP length bit

						  *

						  * STOP length bit table:

						  * 0 -> 1 stop bit

						  * 1 -> 1-1.5 stop bits if

						  *      word length is 5,

						  *      2 stop bits otherwise

						  */

#define MAX3107_LCR_PARITY_BIT		(1 << 3) /* Parity bit enable */

#define MAX3107_LCR_EVENPARITY_BIT	(1 << 4) /* Even parity bit enable */

#define MAX3107_LCR_FORCEPARITY_BIT	(1 << 5) /* 9-bit multidrop parity */

#define MAX3107_LCR_TXBREAK_BIT		(1 << 6) /* TX break enable */

#define MAX3107_LCR_RTS_BIT		(1 << 7) /* RTS pin control */

#define MAX3107_LCR_WORD_LEN_5		(0x0000)

#define MAX3107_LCR_WORD_LEN_6		(0x0001)

#define MAX3107_LCR_WORD_LEN_7		(0x0002)

#define MAX3107_LCR_WORD_LEN_8		(0x0003)





/* IRDA register bits */

#define MAX3107_IRDA_IRDAEN_BIT		(1 << 0) /* IRDA mode enable */

#define MAX3107_IRDA_SIR_BIT		(1 << 1) /* SIR mode enable */

#define MAX3107_IRDA_SHORTIR_BIT	(1 << 2) /* Short SIR mode enable */

#define MAX3107_IRDA_MIR_BIT		(1 << 3) /* MIR mode enable */

#define MAX3107_IRDA_RXINV_BIT		(1 << 4) /* RX logic inversion enable */

#define MAX3107_IRDA_TXINV_BIT		(1 << 5) /* TX logic inversion enable */

#define MAX3107_IRDA_UNDEF6_BIT		(1 << 6) /* Undefined/not used */

#define MAX3107_IRDA_UNDEF7_BIT		(1 << 7) /* Undefined/not used */



/* Flow control trigger level register masks */

#define MAX3107_FLOWLVL_HALT_MASK	(0x000f) /* Flow control halt level */

#define MAX3107_FLOWLVL_RES_MASK	(0x00f0) /* Flow control resume level */

#define MAX3107_FLOWLVL_HALT(words)	((words/8) & 0x000f)

#define MAX3107_FLOWLVL_RES(words)	(((words/8) & 0x000f) << 4)



/* FIFO interrupt trigger level register masks */

#define MAX3107_FIFOTRIGLVL_TX_MASK	(0x000f) /* TX FIFO trigger level */

#define MAX3107_FIFOTRIGLVL_RX_MASK	(0x00f0) /* RX FIFO trigger level */

#define MAX3107_FIFOTRIGLVL_TX(words)	((words/8) & 0x000f)

#define MAX3107_FIFOTRIGLVL_RX(words)	(((words/8) & 0x000f) << 4)



/* Flow control register bits */

#define MAX3107_FLOWCTRL_AUTORTS_BIT	(1 << 0) /* Auto RTS flow ctrl enable */

#define MAX3107_FLOWCTRL_AUTOCTS_BIT	(1 << 1) /* Auto CTS flow ctrl enable */

#define MAX3107_FLOWCTRL_GPIADDR_BIT	(1 << 2) /* Enables that GPIO inputs

						  * are used in conjunction with

						  * XOFF2 for definition of

						  * special character */

#define MAX3107_FLOWCTRL_SWFLOWEN_BIT	(1 << 3) /* Auto SW flow ctrl enable */

#define MAX3107_FLOWCTRL_SWFLOW0_BIT	(1 << 4) /* SWFLOW bit 0 */

#define MAX3107_FLOWCTRL_SWFLOW1_BIT	(1 << 5) /* SWFLOW bit 1

						  *

						  * SWFLOW bits 1 & 0 table:

						  * 00 -> no transmitter flow

						  *       control

						  * 01 -> receiver compares

						  *       XON2 and XOFF2

						  *       and controls

						  *       transmitter

						  * 10 -> receiver compares

						  *       XON1 and XOFF1

						  *       and controls

						  *       transmitter

						  * 11 -> receiver compares

						  *       XON1, XON2, XOFF1 and

						  *       XOFF2 and controls

						  *       transmitter

						  */

#define MAX3107_FLOWCTRL_SWFLOW2_BIT	(1 << 6) /* SWFLOW bit 2 */

#define MAX3107_FLOWCTRL_SWFLOW3_BIT	(1 << 7) /* SWFLOW bit 3

						  *

						  * SWFLOW bits 3 & 2 table:

						  * 00 -> no received flow

						  *       control

						  * 01 -> transmitter generates

						  *       XON2 and XOFF2

						  * 10 -> transmitter generates

						  *       XON1 and XOFF1

						  * 11 -> transmitter generates

						  *       XON1, XON2, XOFF1 and

						  *       XOFF2

						  */



/* GPIO configuration register bits */

#define MAX3107_GPIOCFG_GP0OUT_BIT	(1 << 0) /* GPIO 0 output enable */

#define MAX3107_GPIOCFG_GP1OUT_BIT	(1 << 1) /* GPIO 1 output enable */

#define MAX3107_GPIOCFG_GP2OUT_BIT	(1 << 2) /* GPIO 2 output enable */

#define MAX3107_GPIOCFG_GP3OUT_BIT	(1 << 3) /* GPIO 3 output enable */

#define MAX3107_GPIOCFG_GP0OD_BIT	(1 << 4) /* GPIO 0 open-drain enable */

#define MAX3107_GPIOCFG_GP1OD_BIT	(1 << 5) /* GPIO 1 open-drain enable */

#define MAX3107_GPIOCFG_GP2OD_BIT	(1 << 6) /* GPIO 2 open-drain enable */

#define MAX3107_GPIOCFG_GP3OD_BIT	(1 << 7) /* GPIO 3 open-drain enable */



/* GPIO DATA register bits */

#define MAX3107_GPIODATA_GP0OUT_BIT	(1 << 0) /* GPIO 0 output value */

#define MAX3107_GPIODATA_GP1OUT_BIT	(1 << 1) /* GPIO 1 output value */

#define MAX3107_GPIODATA_GP2OUT_BIT	(1 << 2) /* GPIO 2 output value */

#define MAX3107_GPIODATA_GP3OUT_BIT	(1 << 3) /* GPIO 3 output value */

#define MAX3107_GPIODATA_GP0IN_BIT	(1 << 4) /* GPIO 0 input value */

#define MAX3107_GPIODATA_GP1IN_BIT	(1 << 5) /* GPIO 1 input value */

#define MAX3107_GPIODATA_GP2IN_BIT	(1 << 6) /* GPIO 2 input value */

#define MAX3107_GPIODATA_GP3IN_BIT	(1 << 7) /* GPIO 3 input value */



/* PLL configuration register masks */

#define MAX3107_PLLCFG_PREDIV_MASK	(0x003f) /* PLL predivision value */

#define MAX3107_PLLCFG_PLLFACTOR_MASK	(0x00c0) /* PLL multiplication factor */



/* Baud rate generator configuration register masks and bits */

#define MAX3107_BRGCFG_FRACT_MASK	(0x000f) /* Fractional portion of

						  * Baud rate generator divisor

						  */

#define MAX3107_BRGCFG_2XMODE_BIT	(1 << 4) /* Double baud rate */

#define MAX3107_BRGCFG_4XMODE_BIT	(1 << 5) /* Quadruple baud rate */

#define MAX3107_BRGCFG_UNDEF6_BIT	(1 << 6) /* Undefined/not used */

#define MAX3107_BRGCFG_UNDEF7_BIT	(1 << 7) /* Undefined/not used */



/* Clock source register bits */

#define MAX3107_CLKSRC_INTOSC_BIT	(1 << 0) /* Internal osc enable */

#define MAX3107_CLKSRC_CRYST_BIT	(1 << 1) /* Crystal osc enable */

#define MAX3107_CLKSRC_PLL_BIT		(1 << 2) /* PLL enable */

#define MAX3107_CLKSRC_PLLBYP_BIT	(1 << 3) /* PLL bypass */

#define MAX3107_CLKSRC_EXTCLK_BIT	(1 << 4) /* External clock enable */

#define MAX3107_CLKSRC_UNDEF5_BIT	(1 << 5) /* Undefined/not used */

#define MAX3107_CLKSRC_UNDEF6_BIT	(1 << 6) /* Undefined/not used */

#define MAX3107_CLKSRC_CLK2RTS_BIT	(1 << 7) /* Baud clk to RTS pin */





/* HW definitions */

#define MAX3107_RX_FIFO_SIZE	128

#define MAX3107_TX_FIFO_SIZE	128

#define MAX3107_REVID1		0x00a0

#define MAX3107_REVID2		0x00a1





/* Baud rate generator configuration values for external clock 13MHz */

#define MAX3107_BRG13_B300	(0x0A9400 | 0x05)

#define MAX3107_BRG13_B600	(0x054A00 | 0x03)

#define MAX3107_BRG13_B1200	(0x02A500 | 0x01)

#define MAX3107_BRG13_B2400	(0x015200 | 0x09)

#define MAX3107_BRG13_B4800	(0x00A900 | 0x04)

#define MAX3107_BRG13_B9600	(0x005400 | 0x0A)

#define MAX3107_BRG13_B19200	(0x002A00 | 0x05)

#define MAX3107_BRG13_B38400	(0x001500 | 0x03)

#define MAX3107_BRG13_B57600	(0x000E00 | 0x02)

#define MAX3107_BRG13_B115200	(0x000700 | 0x01)

#define MAX3107_BRG13_B230400	(0x000300 | 0x08)

#define MAX3107_BRG13_B460800	(0x000100 | 0x0c)

#define MAX3107_BRG13_B921600	(0x000100 | 0x1c)



/* Baud rate generator configuration values for external clock 26MHz */

#define MAX3107_BRG26_B300	(0x152800 | 0x0A)

#define MAX3107_BRG26_B600	(0x0A9400 | 0x05)

#define MAX3107_BRG26_B1200	(0x054A00 | 0x03)

#define MAX3107_BRG26_B2400	(0x02A500 | 0x01)

#define MAX3107_BRG26_B4800	(0x015200 | 0x09)

#define MAX3107_BRG26_B9600	(0x00A900 | 0x04)

#define MAX3107_BRG26_B19200	(0x005400 | 0x0A)

#define MAX3107_BRG26_B38400	(0x002A00 | 0x05)

#define MAX3107_BRG26_B57600	(0x001C00 | 0x03)

#define MAX3107_BRG26_B115200	(0x000E00 | 0x02)

#define MAX3107_BRG26_B230400	(0x000700 | 0x01)

#define MAX3107_BRG26_B460800	(0x000300 | 0x08)

#define MAX3107_BRG26_B921600	(0x000100 | 0x0C)



/* Baud rate generator configuration values for internal clock */

#define MAX3107_BRG13_IB300	(0x008000 | 0x00)

#define MAX3107_BRG13_IB600	(0x004000 | 0x00)

#define MAX3107_BRG13_IB1200	(0x002000 | 0x00)

#define MAX3107_BRG13_IB2400	(0x001000 | 0x00)

#define MAX3107_BRG13_IB4800	(0x000800 | 0x00)

#define MAX3107_BRG13_IB9600	(0x000400 | 0x00)

#define MAX3107_BRG13_IB19200	(0x000200 | 0x00)

#define MAX3107_BRG13_IB38400	(0x000100 | 0x00)

#define MAX3107_BRG13_IB57600	(0x000000 | 0x0B)

#define MAX3107_BRG13_IB115200	(0x000000 | 0x05)

#define MAX3107_BRG13_IB230400	(0x000000 | 0x03)

#define MAX3107_BRG13_IB460800	(0x000000 | 0x00)

#define MAX3107_BRG13_IB921600	(0x000000 | 0x00)





struct baud_table {

	int baud;

	u32 new_brg;

};



struct max3107_port {

	/* UART port structure */

	struct uart_port port;



	/* SPI device structure */

	struct spi_device *spi;



#if defined(CONFIG_GPIOLIB)

	/* GPIO chip structure */

	struct gpio_chip chip;

#endif



	/* Workqueue that does all the magic */

	struct workqueue_struct *workqueue;

	struct work_struct work;



	/* Lock for shared data */

	spinlock_t data_lock;



	/* Device configuration */

	int ext_clk;		/* 1 if external clock used */

	int loopback;		/* Current loopback mode state */

	int baud;			/* Current baud rate */



	/* State flags */

	int suspended;		/* Indicates suspend mode */

	int tx_fifo_empty;	/* Flag for TX FIFO state */

	int rx_enabled;		/* Flag for receiver state */

	int tx_enabled;		/* Flag for transmitter state */



	u16 irqen_reg;		/* Current IRQ enable register value */

	/* Shared data */

	u16 mode1_reg;		/* Current mode1 register value*/

	int mode1_commit;	/* Flag for setting new mode1 register value */

	u16 lcr_reg;		/* Current LCR register value */

	int lcr_commit;		/* Flag for setting new LCR register value */

	u32 brg_cfg;		/* Current Baud rate generator config  */

	int brg_commit;		/* Flag for setting new baud rate generator

				 * config

				 */

	struct baud_table *baud_tbl;

	int handle_irq;		/* Indicates that IRQ should be handled */



	/* Rx buffer and str*/

	u16 *rxbuf;

	u8  *rxstr;

	/* Tx buffer*/

	u16 *txbuf;



	struct max3107_plat *pdata;	/* Platform data */

};



/* Platform data structure */

struct max3107_plat {

	/* Loopback mode enable */

	int loopback;

	/* External clock enable */

	int ext_clk;

	/* Called during the register initialisation */

	void (*init)(struct max3107_port *s);

	/* Called when the port is found and configured */

	int (*configure)(struct max3107_port *s);

	/* HW suspend function */

	void (*hw_suspend) (struct max3107_port *s, int suspend);

	/* Polling mode enable */

	int polled_mode;

	/* Polling period if polling mode enabled */

	int poll_time;

};



extern int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len);

extern void max3107_hw_susp(struct max3107_port *s, int suspend);

extern int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata);

extern int max3107_remove(struct spi_device *spi);

extern int max3107_suspend(struct spi_device *spi, pm_message_t state);

extern int max3107_resume(struct spi_device *spi);



#endif /* _LINUX_SERIAL_MAX3107_H */

drivers/tty/serial/max310x.c

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