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linux/drivers/media/rc/nuvoton-cir.h
Jarod Wilson de4ed0c111 [media] nuvoton-cir: simplify raw IR sample handling 
The nuvoton-cir driver was storing up consecutive pulse-pulse and
space-space samples internally, for no good reason, since
ir_raw_event_store_with_filter() already merges back to back like
samples types for us. This should also fix a regression introduced late
in 3.0 that related to a timeout change, which actually becomes correct
when coupled with this change. Tested with RC6 and RC5 on my own
nuvoton-cir hardware atop vanilla 3.0.0, after verifying quirky
behavior in 3.0 due to the timeout change.

Reported-by: Stephan Raue <sraue@openelec.tv>
CC: Stephan Raue <sraue@openelec.tv>
CC: stable@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-09-11 09:33:40 -03:00

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/*
* Driver for Nuvoton Technology Corporation w83667hg/w83677hg-i CIR
*
* Copyright (C) 2010 Jarod Wilson <jarod@redhat.com>
* Copyright (C) 2009 Nuvoton PS Team
*
* Special thanks to Nuvoton for providing hardware, spec sheets and
* sample code upon which portions of this driver are based. Indirect
* thanks also to Maxim Levitsky, whose ene_ir driver this driver is
* modeled after.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <linux/spinlock.h>
#include <linux/ioctl.h>
/* platform driver name to register */
#define NVT_DRIVER_NAME "nuvoton-cir"
/* debugging module parameter */
static int debug;
#define nvt_pr(level, text, ...) \
printk(level KBUILD_MODNAME ": " text, ## __VA_ARGS__)
#define nvt_dbg(text, ...) \
if (debug) \
printk(KERN_DEBUG \
KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
#define nvt_dbg_verbose(text, ...) \
if (debug > 1) \
printk(KERN_DEBUG \
KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
#define nvt_dbg_wake(text, ...) \
if (debug > 2) \
printk(KERN_DEBUG \
KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
/*
* Original lirc driver said min value of 76, and recommended value of 256
* for the buffer length, but then used 2048. Never mind that the size of the
* RX FIFO is 32 bytes... So I'm using 32 for RX and 256 for TX atm, but I'm
* not sure if maybe that TX value is off by a factor of 8 (bits vs. bytes),
* and I don't have TX-capable hardware to test/debug on...
*/
#define TX_BUF_LEN 256
#define RX_BUF_LEN 32
struct nvt_dev {
struct pnp_dev *pdev;
struct rc_dev *rdev;
spinlock_t nvt_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;
u8 tx_state;
} tx;
/* EFER Config register index/data pair */
u8 cr_efir;
u8 cr_efdr;
/* hardware I/O settings */
unsigned long cir_addr;
unsigned long cir_wake_addr;
int cir_irq;
int cir_wake_irq;
/* hardware id */
u8 chip_major;
u8 chip_minor;
/* hardware features */
bool hw_learning_capable;
bool hw_tx_capable;
/* rx settings */
bool learning_enabled;
bool carrier_detect_enabled;
/* track cir wake state */
u8 wake_state;
/* for study */
u8 study_state;
/* carrier period = 1 / frequency */
u32 carrier;
};
/* study states */
#define ST_STUDY_NONE 0x0
#define ST_STUDY_START 0x1
#define ST_STUDY_CARRIER 0x2
#define ST_STUDY_ALL_RECV 0x4
/* wake states */
#define ST_WAKE_NONE 0x0
#define ST_WAKE_START 0x1
#define ST_WAKE_FINISH 0x2
/* receive states */
#define ST_RX_WAIT_7F 0x1
#define ST_RX_WAIT_HEAD 0x2
#define ST_RX_WAIT_SILENT_END 0x4
/* send states */
#define ST_TX_NONE 0x0
#define ST_TX_REQUEST 0x2
#define ST_TX_REPLY 0x4
/* buffer packet constants */
#define BUF_PULSE_BIT 0x80
#define BUF_LEN_MASK 0x7f
#define BUF_REPEAT_BYTE 0x70
#define BUF_REPEAT_MASK 0xf0
/* CIR settings */
/* total length of CIR and CIR WAKE */
#define CIR_IOREG_LENGTH 0x0f
/* RX limit length, 8 high bits for SLCH, 8 low bits for SLCL (0x7d0 = 2000) */
#define CIR_RX_LIMIT_COUNT 0x7d0
/* CIR Regs */
#define CIR_IRCON 0x00
#define CIR_IRSTS 0x01
#define CIR_IREN 0x02
#define CIR_RXFCONT 0x03
#define CIR_CP 0x04
#define CIR_CC 0x05
#define CIR_SLCH 0x06
#define CIR_SLCL 0x07
#define CIR_FIFOCON 0x08
#define CIR_IRFIFOSTS 0x09
#define CIR_SRXFIFO 0x0a
#define CIR_TXFCONT 0x0b
#define CIR_STXFIFO 0x0c
#define CIR_FCCH 0x0d
#define CIR_FCCL 0x0e
#define CIR_IRFSM 0x0f
/* CIR IRCON settings */
#define CIR_IRCON_RECV 0x80
#define CIR_IRCON_WIREN 0x40
#define CIR_IRCON_TXEN 0x20
#define CIR_IRCON_RXEN 0x10
#define CIR_IRCON_WRXINV 0x08
#define CIR_IRCON_RXINV 0x04
#define CIR_IRCON_SAMPLE_PERIOD_SEL_1 0x00
#define CIR_IRCON_SAMPLE_PERIOD_SEL_25 0x01
#define CIR_IRCON_SAMPLE_PERIOD_SEL_50 0x02
#define CIR_IRCON_SAMPLE_PERIOD_SEL_100 0x03
/* FIXME: make this a runtime option */
/* select sample period as 50us */
#define CIR_IRCON_SAMPLE_PERIOD_SEL CIR_IRCON_SAMPLE_PERIOD_SEL_50
/* CIR IRSTS settings */
#define CIR_IRSTS_RDR 0x80
#define CIR_IRSTS_RTR 0x40
#define CIR_IRSTS_PE 0x20
#define CIR_IRSTS_RFO 0x10
#define CIR_IRSTS_TE 0x08
#define CIR_IRSTS_TTR 0x04
#define CIR_IRSTS_TFU 0x02
#define CIR_IRSTS_GH 0x01
/* CIR IREN settings */
#define CIR_IREN_RDR 0x80
#define CIR_IREN_RTR 0x40
#define CIR_IREN_PE 0x20
#define CIR_IREN_RFO 0x10
#define CIR_IREN_TE 0x08
#define CIR_IREN_TTR 0x04
#define CIR_IREN_TFU 0x02
#define CIR_IREN_GH 0x01
/* CIR FIFOCON settings */
#define CIR_FIFOCON_TXFIFOCLR 0x80
#define CIR_FIFOCON_TX_TRIGGER_LEV_31 0x00
#define CIR_FIFOCON_TX_TRIGGER_LEV_24 0x10
#define CIR_FIFOCON_TX_TRIGGER_LEV_16 0x20
#define CIR_FIFOCON_TX_TRIGGER_LEV_8 0x30
/* FIXME: make this a runtime option */
/* select TX trigger level as 16 */
#define CIR_FIFOCON_TX_TRIGGER_LEV CIR_FIFOCON_TX_TRIGGER_LEV_16
#define CIR_FIFOCON_RXFIFOCLR 0x08
#define CIR_FIFOCON_RX_TRIGGER_LEV_1 0x00
#define CIR_FIFOCON_RX_TRIGGER_LEV_8 0x01
#define CIR_FIFOCON_RX_TRIGGER_LEV_16 0x02
#define CIR_FIFOCON_RX_TRIGGER_LEV_24 0x03
/* FIXME: make this a runtime option */
/* select RX trigger level as 24 */
#define CIR_FIFOCON_RX_TRIGGER_LEV CIR_FIFOCON_RX_TRIGGER_LEV_24
/* CIR IRFIFOSTS settings */
#define CIR_IRFIFOSTS_IR_PENDING 0x80
#define CIR_IRFIFOSTS_RX_GS 0x40
#define CIR_IRFIFOSTS_RX_FTA 0x20
#define CIR_IRFIFOSTS_RX_EMPTY 0x10
#define CIR_IRFIFOSTS_RX_FULL 0x08
#define CIR_IRFIFOSTS_TX_FTA 0x04
#define CIR_IRFIFOSTS_TX_EMPTY 0x02
#define CIR_IRFIFOSTS_TX_FULL 0x01
/* CIR WAKE UP Regs */
#define CIR_WAKE_IRCON 0x00
#define CIR_WAKE_IRSTS 0x01
#define CIR_WAKE_IREN 0x02
#define CIR_WAKE_FIFO_CMP_DEEP 0x03
#define CIR_WAKE_FIFO_CMP_TOL 0x04
#define CIR_WAKE_FIFO_COUNT 0x05
#define CIR_WAKE_SLCH 0x06
#define CIR_WAKE_SLCL 0x07
#define CIR_WAKE_FIFOCON 0x08
#define CIR_WAKE_SRXFSTS 0x09
#define CIR_WAKE_SAMPLE_RX_FIFO 0x0a
#define CIR_WAKE_WR_FIFO_DATA 0x0b
#define CIR_WAKE_RD_FIFO_ONLY 0x0c
#define CIR_WAKE_RD_FIFO_ONLY_IDX 0x0d
#define CIR_WAKE_FIFO_IGNORE 0x0e
#define CIR_WAKE_IRFSM 0x0f
/* CIR WAKE UP IRCON settings */
#define CIR_WAKE_IRCON_DEC_RST 0x80
#define CIR_WAKE_IRCON_MODE1 0x40
#define CIR_WAKE_IRCON_MODE0 0x20
#define CIR_WAKE_IRCON_RXEN 0x10
#define CIR_WAKE_IRCON_R 0x08
#define CIR_WAKE_IRCON_RXINV 0x04
/* FIXME/jarod: make this a runtime option */
/* select a same sample period like cir register */
#define CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL CIR_IRCON_SAMPLE_PERIOD_SEL_50
/* CIR WAKE IRSTS Bits */
#define CIR_WAKE_IRSTS_RDR 0x80
#define CIR_WAKE_IRSTS_RTR 0x40
#define CIR_WAKE_IRSTS_PE 0x20
#define CIR_WAKE_IRSTS_RFO 0x10
#define CIR_WAKE_IRSTS_GH 0x08
#define CIR_WAKE_IRSTS_IR_PENDING 0x01
/* CIR WAKE UP IREN Bits */
#define CIR_WAKE_IREN_RDR 0x80
#define CIR_WAKE_IREN_RTR 0x40
#define CIR_WAKE_IREN_PE 0x20
#define CIR_WAKE_IREN_RFO 0x10
#define CIR_WAKE_IREN_TE 0x08
#define CIR_WAKE_IREN_TTR 0x04
#define CIR_WAKE_IREN_TFU 0x02
#define CIR_WAKE_IREN_GH 0x01
/* CIR WAKE FIFOCON settings */
#define CIR_WAKE_FIFOCON_RXFIFOCLR 0x08
#define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_67 0x00
#define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_66 0x01
#define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_65 0x02
#define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_64 0x03
/* FIXME: make this a runtime option */
/* select WAKE UP RX trigger level as 67 */
#define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_67
/* CIR WAKE SRXFSTS settings */
#define CIR_WAKE_IRFIFOSTS_RX_GS 0x80
#define CIR_WAKE_IRFIFOSTS_RX_FTA 0x40
#define CIR_WAKE_IRFIFOSTS_RX_EMPTY 0x20
#define CIR_WAKE_IRFIFOSTS_RX_FULL 0x10
/*
* The CIR Wake FIFO buffer is 67 bytes long, but the stock remote wakes
* the system comparing only 65 bytes (fails with this set to 67)
*/
#define CIR_WAKE_FIFO_CMP_BYTES 65
/* CIR Wake byte comparison tolerance */
#define CIR_WAKE_CMP_TOLERANCE 5
/*
* Extended Function Enable Registers:
* Extended Function Index Register
* Extended Function Data Register
*/
#define CR_EFIR 0x2e
#define CR_EFDR 0x2f
/* Possible alternate EFER values, depends on how the chip is wired */
#define CR_EFIR2 0x4e
#define CR_EFDR2 0x4f
/* Extended Function Mode enable/disable magic values */
#define EFER_EFM_ENABLE 0x87
#define EFER_EFM_DISABLE 0xaa
/* Chip IDs found in CR_CHIP_ID_{HI,LO} */
#define CHIP_ID_HIGH_667 0xa5
#define CHIP_ID_HIGH_677B 0xb4
#define CHIP_ID_HIGH_677C 0xc3
#define CHIP_ID_LOW_667 0x13
#define CHIP_ID_LOW_677B2 0x72
#define CHIP_ID_LOW_677B3 0x73
#define CHIP_ID_LOW_677C 0x33
/* Config regs we need to care about */
#define CR_SOFTWARE_RESET 0x02
#define CR_LOGICAL_DEV_SEL 0x07
#define CR_CHIP_ID_HI 0x20
#define CR_CHIP_ID_LO 0x21
#define CR_DEV_POWER_DOWN 0x22 /* bit 2 is CIR power, default power on */
#define CR_OUTPUT_PIN_SEL 0x27
#define CR_MULTIFUNC_PIN_SEL 0x2c
#define CR_LOGICAL_DEV_EN 0x30 /* valid for all logical devices */
/* next three regs valid for both the CIR and CIR_WAKE logical devices */
#define CR_CIR_BASE_ADDR_HI 0x60
#define CR_CIR_BASE_ADDR_LO 0x61
#define CR_CIR_IRQ_RSRC 0x70
/* next three regs valid only for ACPI logical dev */
#define CR_ACPI_CIR_WAKE 0xe0
#define CR_ACPI_IRQ_EVENTS 0xf6
#define CR_ACPI_IRQ_EVENTS2 0xf7
/* Logical devices that we need to care about */
#define LOGICAL_DEV_LPT 0x01
#define LOGICAL_DEV_CIR 0x06
#define LOGICAL_DEV_ACPI 0x0a
#define LOGICAL_DEV_CIR_WAKE 0x0e
#define LOGICAL_DEV_DISABLE 0x00
#define LOGICAL_DEV_ENABLE 0x01
#define CIR_WAKE_ENABLE_BIT 0x08
#define CIR_INTR_MOUSE_IRQ_BIT 0x80
#define PME_INTR_CIR_PASS_BIT 0x08
/* w83677hg CIR pin config */
#define OUTPUT_PIN_SEL_MASK 0xbc
#define OUTPUT_ENABLE_CIR 0x01 /* Pin95=CIRRX, Pin96=CIRTX1 */
#define OUTPUT_ENABLE_CIRWB 0x40 /* enable wide-band sensor */
/* w83667hg CIR pin config */
#define MULTIFUNC_PIN_SEL_MASK 0x1f
#define MULTIFUNC_ENABLE_CIR 0x80 /* Pin75=CIRRX, Pin76=CIRTX1 */
#define MULTIFUNC_ENABLE_CIRWB 0x20 /* enable wide-band sensor */
/* MCE CIR signal length, related on sample period */
/* MCE CIR controller signal length: about 43ms
* 43ms / 50us (sample period) * 0.85 (inaccuracy)
*/
#define CONTROLLER_BUF_LEN_MIN 830
/* MCE CIR keyboard signal length: about 26ms
* 26ms / 50us (sample period) * 0.85 (inaccuracy)
*/
#define KEYBOARD_BUF_LEN_MAX 650
#define KEYBOARD_BUF_LEN_MIN 610
/* MCE CIR mouse signal length: about 24ms
* 24ms / 50us (sample period) * 0.85 (inaccuracy)
*/
#define MOUSE_BUF_LEN_MIN 565
#define CIR_SAMPLE_PERIOD 50
#define CIR_SAMPLE_LOW_INACCURACY 0.85
/* MAX silence time that driver will sent to lirc */
#define MAX_SILENCE_TIME 60000
#if CIR_IRCON_SAMPLE_PERIOD_SEL == CIR_IRCON_SAMPLE_PERIOD_SEL_100
#define SAMPLE_PERIOD 100
#elif CIR_IRCON_SAMPLE_PERIOD_SEL == CIR_IRCON_SAMPLE_PERIOD_SEL_50
#define SAMPLE_PERIOD 50
#elif CIR_IRCON_SAMPLE_PERIOD_SEL == CIR_IRCON_SAMPLE_PERIOD_SEL_25
#define SAMPLE_PERIOD 25
#else
#define SAMPLE_PERIOD 1
#endif
/* as VISTA MCE definition, valid carrier value */
#define MAX_CARRIER 60000
#define MIN_CARRIER 30000
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