drivers/media/rc/fintek-cir.h - linux - Git at Google

 /*
  * Driver for Feature Integration Technology Inc. (aka Fintek) LPC CIR
  *
  * Copyright (C) 2011 Jarod Wilson <jarod@redhat.com>
  *
  * Special thanks to Fintek for providing hardware and spec sheets.
  * This driver is based upon the nuvoton, ite and ene drivers for
  * similar hardware.
  *
  * 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.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  */

 #include <linux/spinlock.h>
 #include <linux/ioctl.h>

 /* platform driver name to register */
 #define FINTEK_DRIVER_NAME	"fintek-cir"
 #define FINTEK_DESCRIPTION	"Fintek LPC SuperIO Consumer IR Transceiver"
 #define VENDOR_ID_FINTEK	0x1934


 /* debugging module parameter */
 static int debug;

 #define fit_pr(level, text, ...) \
 	printk(level KBUILD_MODNAME ": " text, ## __VA_ARGS__)

 #define fit_dbg(text, ...) \
 	if (debug) \
 		printk(KERN_DEBUG \
 			KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)

 #define fit_dbg_verbose(text, ...) \
 	if (debug > 1) \
 		printk(KERN_DEBUG \
 			KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)

 #define fit_dbg_wake(text, ...) \
 	if (debug > 2) \
 		printk(KERN_DEBUG \
 			KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)


 #define TX_BUF_LEN 256
 #define RX_BUF_LEN 32

 struct fintek_dev {
 	struct pnp_dev *pdev;
 	struct rc_dev *rdev;

 	spinlock_t fintek_lock;

 	/* for rx */
 	u8 buf[RX_BUF_LEN];
 	unsigned int pkts;

 	struct {
 		spinlock_t lock;
 		u8 buf[TX_BUF_LEN];
 		unsigned int buf_count;
 		unsigned int cur_buf_num;
 		wait_queue_head_t queue;
 	} tx;

 	/* Config register index/data port pair */
 	u32 cr_ip;
 	u32 cr_dp;

 	/* hardware I/O settings */
 	unsigned long cir_addr;
 	int cir_irq;
 	int cir_port_len;

 	/* hardware id */
 	u8 chip_major;
 	u8 chip_minor;
 	u16 chip_vendor;
 	u8 logical_dev_cir;

 	/* hardware features */
 	bool hw_learning_capable;
 	bool hw_tx_capable;

 	/* rx settings */
 	bool learning_enabled;
 	bool carrier_detect_enabled;

 	enum {
 		CMD_HEADER = 0,
 		SUBCMD,
 		CMD_DATA,
 		PARSE_IRDATA,
 	} parser_state;

 	u8 cmd, rem;

 	/* carrier period = 1 / frequency */
 	u32 carrier;
 };

 /* buffer packet constants, largely identical to mceusb.c */
 #define BUF_PULSE_BIT		0x80
 #define BUF_LEN_MASK		0x1f
 #define BUF_SAMPLE_MASK		0x7f

 #define BUF_COMMAND_HEADER	0x9f
 #define BUF_COMMAND_MASK	0xe0
 #define BUF_COMMAND_NULL	0x00
 #define BUF_HW_CMD_HEADER	0xff
 #define BUF_CMD_G_REVISION	0x0b
 #define BUF_CMD_S_CARRIER	0x06
 #define BUF_CMD_S_TIMEOUT	0x0c
 #define BUF_CMD_SIG_END		0x01
 #define BUF_CMD_S_TXMASK	0x08
 #define BUF_CMD_S_RXSENSOR	0x14
 #define BUF_RSP_PULSE_COUNT	0x15

 #define CIR_SAMPLE_PERIOD	50

 /*
  * Configuration Register:
  *  Index Port
  *  Data Port
  */
 #define CR_INDEX_PORT		0x2e
 #define CR_DATA_PORT		0x2f

 /* Possible alternate values, depends on how the chip is wired */
 #define CR_INDEX_PORT2		0x4e
 #define CR_DATA_PORT2		0x4f

 /*
  * GCR_CONFIG_PORT_SEL bit 4 specifies which Index Port value is
  * active. 1 = 0x4e, 0 = 0x2e
  */
 #define PORT_SEL_PORT_4E_EN	0x10

 /* Extended Function Mode enable/disable magic values */
 #define CONFIG_REG_ENABLE	0x87
 #define CONFIG_REG_DISABLE	0xaa

 /* Chip IDs found in CR_CHIP_ID_{HI,LO} */
 #define CHIP_ID_HIGH_F71809U	0x04
 #define CHIP_ID_LOW_F71809U	0x08

 /*
  * Global control regs we need to care about:
  *      Global Control                  def.
  *      Register name           addr    val. */
 #define GCR_SOFTWARE_RESET	0x02 /* 0x00 */
 #define GCR_LOGICAL_DEV_NO	0x07 /* 0x00 */
 #define GCR_CHIP_ID_HI		0x20 /* 0x04 */
 #define GCR_CHIP_ID_LO		0x21 /* 0x08 */
 #define GCR_VENDOR_ID_HI	0x23 /* 0x19 */
 #define GCR_VENDOR_ID_LO	0x24 /* 0x34 */
 #define GCR_CONFIG_PORT_SEL	0x25 /* 0x01 */
 #define GCR_KBMOUSE_WAKEUP	0x27

 #define LOGICAL_DEV_DISABLE	0x00
 #define LOGICAL_DEV_ENABLE	0x01

 /* Logical device number of the CIR function */
 #define LOGICAL_DEV_CIR_REV1	0x05
 #define LOGICAL_DEV_CIR_REV2	0x08

 /* CIR Logical Device (LDN 0x08) config registers */
 #define CIR_CR_COMMAND_INDEX	0x04
 #define CIR_CR_IRCS		0x05 /* Before host writes command to IR, host
 					must set to 1. When host finshes write
 					command to IR, host must clear to 0. */
 #define CIR_CR_COMMAND_DATA	0x06 /* Host read or write command data */
 #define CIR_CR_CLASS		0x07 /* 0xff = rx-only, 0x66 = rx + 2 tx,
 					0x33 = rx + 1 tx */
 #define CIR_CR_DEV_EN		0x30 /* bit0 = 1 enables CIR */
 #define CIR_CR_BASE_ADDR_HI	0x60 /* MSB of CIR IO base addr */
 #define CIR_CR_BASE_ADDR_LO	0x61 /* LSB of CIR IO base addr */
 #define CIR_CR_IRQ_SEL		0x70 /* bits3-0 store CIR IRQ */
 #define CIR_CR_PSOUT_STATUS	0xf1
 #define CIR_CR_WAKE_KEY3_ADDR	0xf8
 #define CIR_CR_WAKE_KEY3_CODE	0xf9
 #define CIR_CR_WAKE_KEY3_DC	0xfa
 #define CIR_CR_WAKE_CONTROL	0xfb
 #define CIR_CR_WAKE_KEY12_ADDR	0xfc
 #define CIR_CR_WAKE_KEY4_ADDR	0xfd
 #define CIR_CR_WAKE_KEY5_ADDR	0xfe

 #define CLASS_RX_ONLY		0xff
 #define CLASS_RX_2TX		0x66
 #define CLASS_RX_1TX		0x33

 /* CIR device registers */
 #define CIR_STATUS		0x00
 #define CIR_RX_DATA		0x01
 #define CIR_TX_CONTROL		0x02
 #define CIR_TX_DATA		0x03
 #define CIR_CONTROL		0x04

 /* Bits to enable CIR wake */
 #define LOGICAL_DEV_ACPI	0x01
 #define LDEV_ACPI_WAKE_EN_REG	0xe8
 #define ACPI_WAKE_EN_CIR_BIT	0x04

 #define LDEV_ACPI_PME_EN_REG	0xf0
 #define LDEV_ACPI_PME_CLR_REG	0xf1
 #define ACPI_PME_CIR_BIT	0x02

 #define LDEV_ACPI_STATE_REG	0xf4
 #define ACPI_STATE_CIR_BIT	0x20

 /*
  * CIR status register (0x00):
  *   7 - CIR_IRQ_EN (1 = enable CIR IRQ, 0 = disable)
  *   3 - TX_FINISH (1 when TX finished, write 1 to clear)
  *   2 - TX_UNDERRUN (1 on TX underrun, write 1 to clear)
  *   1 - RX_TIMEOUT (1 on RX timeout, write 1 to clear)
  *   0 - RX_RECEIVE (1 on RX receive, write 1 to clear)
  */
 #define CIR_STATUS_IRQ_EN	0x80
 #define CIR_STATUS_TX_FINISH	0x08
 #define CIR_STATUS_TX_UNDERRUN	0x04
 #define CIR_STATUS_RX_TIMEOUT	0x02
 #define CIR_STATUS_RX_RECEIVE	0x01
 #define CIR_STATUS_IRQ_MASK	0x0f

 /*
  * CIR TX control register (0x02):
  *   7 - TX_START (1 to indicate TX start, auto-cleared when done)
  *   6 - TX_END (1 to indicate TX data written to TX fifo)
  */
 #define CIR_TX_CONTROL_TX_START	0x80
 #define CIR_TX_CONTROL_TX_END	0x40
	/*
	* Driver for Feature Integration Technology Inc. (aka Fintek) LPC CIR
	*
	* Copyright (C) 2011 Jarod Wilson <jarod@redhat.com>
	*
	* Special thanks to Fintek for providing hardware and spec sheets.
	* This driver is based upon the nuvoton, ite and ene drivers for
	* similar hardware.
	*
	* 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.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*/

	#include <linux/spinlock.h>
	#include <linux/ioctl.h>

	/* platform driver name to register */
	#define FINTEK_DRIVER_NAME "fintek-cir"
	#define FINTEK_DESCRIPTION "Fintek LPC SuperIO Consumer IR Transceiver"
	#define VENDOR_ID_FINTEK 0x1934


	/* debugging module parameter */
	static int debug;

	#define fit_pr(level, text, ...) \
	printk(level KBUILD_MODNAME ": " text, ## __VA_ARGS__)

	#define fit_dbg(text, ...) \
	if (debug) \
	printk(KERN_DEBUG \
	KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)

	#define fit_dbg_verbose(text, ...) \
	if (debug > 1) \
	printk(KERN_DEBUG \
	KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)

	#define fit_dbg_wake(text, ...) \
	if (debug > 2) \
	printk(KERN_DEBUG \
	KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)


	#define TX_BUF_LEN 256
	#define RX_BUF_LEN 32

	struct fintek_dev {
	struct pnp_dev *pdev;
	struct rc_dev *rdev;

	spinlock_t fintek_lock;

	/* for rx */
	u8 buf[RX_BUF_LEN];
	unsigned int pkts;

	struct {
	spinlock_t lock;
	u8 buf[TX_BUF_LEN];
	unsigned int buf_count;
	unsigned int cur_buf_num;
	wait_queue_head_t queue;
	} tx;

	/* Config register index/data port pair */
	u32 cr_ip;
	u32 cr_dp;

	/* hardware I/O settings */
	unsigned long cir_addr;
	int cir_irq;
	int cir_port_len;

	/* hardware id */
	u8 chip_major;
	u8 chip_minor;
	u16 chip_vendor;
	u8 logical_dev_cir;

	/* hardware features */
	bool hw_learning_capable;
	bool hw_tx_capable;

	/* rx settings */
	bool learning_enabled;
	bool carrier_detect_enabled;

	enum {
	CMD_HEADER = 0,
	SUBCMD,
	CMD_DATA,
	PARSE_IRDATA,
	} parser_state;

	u8 cmd, rem;

	/* carrier period = 1 / frequency */
	u32 carrier;
	};

	/* buffer packet constants, largely identical to mceusb.c */
	#define BUF_PULSE_BIT 0x80
	#define BUF_LEN_MASK 0x1f
	#define BUF_SAMPLE_MASK 0x7f

	#define BUF_COMMAND_HEADER 0x9f
	#define BUF_COMMAND_MASK 0xe0
	#define BUF_COMMAND_NULL 0x00
	#define BUF_HW_CMD_HEADER 0xff
	#define BUF_CMD_G_REVISION 0x0b
	#define BUF_CMD_S_CARRIER 0x06
	#define BUF_CMD_S_TIMEOUT 0x0c
	#define BUF_CMD_SIG_END 0x01
	#define BUF_CMD_S_TXMASK 0x08
	#define BUF_CMD_S_RXSENSOR 0x14
	#define BUF_RSP_PULSE_COUNT 0x15

	#define CIR_SAMPLE_PERIOD 50

	/*
	* Configuration Register:
	* Index Port
	* Data Port
	*/
	#define CR_INDEX_PORT 0x2e
	#define CR_DATA_PORT 0x2f

	/* Possible alternate values, depends on how the chip is wired */
	#define CR_INDEX_PORT2 0x4e
	#define CR_DATA_PORT2 0x4f

	/*
	* GCR_CONFIG_PORT_SEL bit 4 specifies which Index Port value is
	* active. 1 = 0x4e, 0 = 0x2e
	*/
	#define PORT_SEL_PORT_4E_EN 0x10

	/* Extended Function Mode enable/disable magic values */
	#define CONFIG_REG_ENABLE 0x87
	#define CONFIG_REG_DISABLE 0xaa

	/* Chip IDs found in CR_CHIP_ID_{HI,LO} */
	#define CHIP_ID_HIGH_F71809U 0x04
	#define CHIP_ID_LOW_F71809U 0x08

	/*
	* Global control regs we need to care about:
	* Global Control def.
	* Register name addr val. */
	#define GCR_SOFTWARE_RESET 0x02 /* 0x00 */
	#define GCR_LOGICAL_DEV_NO 0x07 /* 0x00 */
	#define GCR_CHIP_ID_HI 0x20 /* 0x04 */
	#define GCR_CHIP_ID_LO 0x21 /* 0x08 */
	#define GCR_VENDOR_ID_HI 0x23 /* 0x19 */
	#define GCR_VENDOR_ID_LO 0x24 /* 0x34 */
	#define GCR_CONFIG_PORT_SEL 0x25 /* 0x01 */
	#define GCR_KBMOUSE_WAKEUP 0x27

	#define LOGICAL_DEV_DISABLE 0x00
	#define LOGICAL_DEV_ENABLE 0x01

	/* Logical device number of the CIR function */
	#define LOGICAL_DEV_CIR_REV1 0x05
	#define LOGICAL_DEV_CIR_REV2 0x08

	/* CIR Logical Device (LDN 0x08) config registers */
	#define CIR_CR_COMMAND_INDEX 0x04
	#define CIR_CR_IRCS 0x05 /* Before host writes command to IR, host
	must set to 1. When host finshes write
	command to IR, host must clear to 0. */
	#define CIR_CR_COMMAND_DATA 0x06 /* Host read or write command data */
	#define CIR_CR_CLASS 0x07 /* 0xff = rx-only, 0x66 = rx + 2 tx,
	0x33 = rx + 1 tx */
	#define CIR_CR_DEV_EN 0x30 /* bit0 = 1 enables CIR */
	#define CIR_CR_BASE_ADDR_HI 0x60 /* MSB of CIR IO base addr */
	#define CIR_CR_BASE_ADDR_LO 0x61 /* LSB of CIR IO base addr */
	#define CIR_CR_IRQ_SEL 0x70 /* bits3-0 store CIR IRQ */
	#define CIR_CR_PSOUT_STATUS 0xf1
	#define CIR_CR_WAKE_KEY3_ADDR 0xf8
	#define CIR_CR_WAKE_KEY3_CODE 0xf9
	#define CIR_CR_WAKE_KEY3_DC 0xfa
	#define CIR_CR_WAKE_CONTROL 0xfb
	#define CIR_CR_WAKE_KEY12_ADDR 0xfc
	#define CIR_CR_WAKE_KEY4_ADDR 0xfd
	#define CIR_CR_WAKE_KEY5_ADDR 0xfe

	#define CLASS_RX_ONLY 0xff
	#define CLASS_RX_2TX 0x66
	#define CLASS_RX_1TX 0x33

	/* CIR device registers */
	#define CIR_STATUS 0x00
	#define CIR_RX_DATA 0x01
	#define CIR_TX_CONTROL 0x02
	#define CIR_TX_DATA 0x03
	#define CIR_CONTROL 0x04

	/* Bits to enable CIR wake */
	#define LOGICAL_DEV_ACPI 0x01
	#define LDEV_ACPI_WAKE_EN_REG 0xe8
	#define ACPI_WAKE_EN_CIR_BIT 0x04

	#define LDEV_ACPI_PME_EN_REG 0xf0
	#define LDEV_ACPI_PME_CLR_REG 0xf1
	#define ACPI_PME_CIR_BIT 0x02

	#define LDEV_ACPI_STATE_REG 0xf4
	#define ACPI_STATE_CIR_BIT 0x20

	/*
	* CIR status register (0x00):
	* 7 - CIR_IRQ_EN (1 = enable CIR IRQ, 0 = disable)
	* 3 - TX_FINISH (1 when TX finished, write 1 to clear)
	* 2 - TX_UNDERRUN (1 on TX underrun, write 1 to clear)
	* 1 - RX_TIMEOUT (1 on RX timeout, write 1 to clear)
	* 0 - RX_RECEIVE (1 on RX receive, write 1 to clear)
	*/
	#define CIR_STATUS_IRQ_EN 0x80
	#define CIR_STATUS_TX_FINISH 0x08
	#define CIR_STATUS_TX_UNDERRUN 0x04
	#define CIR_STATUS_RX_TIMEOUT 0x02
	#define CIR_STATUS_RX_RECEIVE 0x01
	#define CIR_STATUS_IRQ_MASK 0x0f

	/*
	* CIR TX control register (0x02):
	* 7 - TX_START (1 to indicate TX start, auto-cleared when done)
	* 6 - TX_END (1 to indicate TX data written to TX fifo)
	*/
	#define CIR_TX_CONTROL_TX_START 0x80
	#define CIR_TX_CONTROL_TX_END 0x40