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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* driver for ENE KB3926 B/C/D/E/F CIR (also known as ENE0XXX)
*
* Copyright (C) 2010 Maxim Levitsky <maximlevitsky@gmail.com>
*/
#include <linux/spinlock.h>
/* hardware address */
#define ENE_STATUS 0 /* hardware status - unused */
#define ENE_ADDR_HI 1 /* hi byte of register address */
#define ENE_ADDR_LO 2 /* low byte of register address */
#define ENE_IO 3 /* read/write window */
#define ENE_IO_SIZE 4
/* 8 bytes of samples, divided in 2 packets*/
#define ENE_FW_SAMPLE_BUFFER 0xF8F0 /* sample buffer */
#define ENE_FW_SAMPLE_SPACE 0x80 /* sample is space */
#define ENE_FW_PACKET_SIZE 4
/* first firmware flag register */
#define ENE_FW1 0xF8F8 /* flagr */
#define ENE_FW1_ENABLE 0x01 /* enable fw processing */
#define ENE_FW1_TXIRQ 0x02 /* TX interrupt pending */
#define ENE_FW1_HAS_EXTRA_BUF 0x04 /* fw uses extra buffer*/
#define ENE_FW1_EXTRA_BUF_HND 0x08 /* extra buffer handshake bit*/
#define ENE_FW1_LED_ON 0x10 /* turn on a led */
#define ENE_FW1_WPATTERN 0x20 /* enable wake pattern */
#define ENE_FW1_WAKE 0x40 /* enable wake from S3 */
#define ENE_FW1_IRQ 0x80 /* enable interrupt */
/* second firmware flag register */
#define ENE_FW2 0xF8F9 /* flagw */
#define ENE_FW2_BUF_WPTR 0x01 /* which half of the buffer to read */
#define ENE_FW2_RXIRQ 0x04 /* RX IRQ pending*/
#define ENE_FW2_GP0A 0x08 /* Use GPIO0A for demodulated input */
#define ENE_FW2_EMMITER1_CONN 0x10 /* TX emmiter 1 connected */
#define ENE_FW2_EMMITER2_CONN 0x20 /* TX emmiter 2 connected */
#define ENE_FW2_FAN_INPUT 0x40 /* fan input used for demodulated data*/
#define ENE_FW2_LEARNING 0x80 /* hardware supports learning and TX */
/* firmware RX pointer for new style buffer */
#define ENE_FW_RX_POINTER 0xF8FA
/* high parts of samples for fan input (8 samples)*/
#define ENE_FW_SMPL_BUF_FAN 0xF8FB
#define ENE_FW_SMPL_BUF_FAN_PLS 0x8000 /* combined sample is pulse */
#define ENE_FW_SMPL_BUF_FAN_MSK 0x0FFF /* combined sample maximum value */
#define ENE_FW_SAMPLE_PERIOD_FAN 61 /* fan input has fixed sample period */
/* transmitter ports */
#define ENE_GPIOFS1 0xFC01
#define ENE_GPIOFS1_GPIO0D 0x20 /* enable tx output on GPIO0D */
#define ENE_GPIOFS8 0xFC08
#define ENE_GPIOFS8_GPIO41 0x02 /* enable tx output on GPIO40 */
/* IRQ registers block (for revision B) */
#define ENEB_IRQ 0xFD09 /* IRQ number */
#define ENEB_IRQ_UNK1 0xFD17 /* unknown setting = 1 */
#define ENEB_IRQ_STATUS 0xFD80 /* irq status */
#define ENEB_IRQ_STATUS_IR 0x20 /* IR irq */
/* fan as input settings */
#define ENE_FAN_AS_IN1 0xFE30 /* fan init reg 1 */
#define ENE_FAN_AS_IN1_EN 0xCD
#define ENE_FAN_AS_IN2 0xFE31 /* fan init reg 2 */
#define ENE_FAN_AS_IN2_EN 0x03
/* IRQ registers block (for revision C,D) */
#define ENE_IRQ 0xFE9B /* new irq settings register */
#define ENE_IRQ_MASK 0x0F /* irq number mask */
#define ENE_IRQ_UNK_EN 0x10 /* always enabled */
#define ENE_IRQ_STATUS 0x20 /* irq status and ACK */
/* CIR Config register #1 */
#define ENE_CIRCFG 0xFEC0
#define ENE_CIRCFG_RX_EN 0x01 /* RX enable */
#define ENE_CIRCFG_RX_IRQ 0x02 /* Enable hardware interrupt */
#define ENE_CIRCFG_REV_POL 0x04 /* Input polarity reversed */
#define ENE_CIRCFG_CARR_DEMOD 0x08 /* Enable carrier demodulator */
#define ENE_CIRCFG_TX_EN 0x10 /* TX enable */
#define ENE_CIRCFG_TX_IRQ 0x20 /* Send interrupt on TX done */
#define ENE_CIRCFG_TX_POL_REV 0x40 /* TX polarity reversed */
#define ENE_CIRCFG_TX_CARR 0x80 /* send TX carrier or not */
/* CIR config register #2 */
#define ENE_CIRCFG2 0xFEC1
#define ENE_CIRCFG2_RLC 0x00
#define ENE_CIRCFG2_RC5 0x01
#define ENE_CIRCFG2_RC6 0x02
#define ENE_CIRCFG2_NEC 0x03
#define ENE_CIRCFG2_CARR_DETECT 0x10 /* Enable carrier detection */
#define ENE_CIRCFG2_GPIO0A 0x20 /* Use GPIO0A instead of GPIO40 for input */
#define ENE_CIRCFG2_FAST_SAMPL1 0x40 /* Fast leading pulse detection for RC6 */
#define ENE_CIRCFG2_FAST_SAMPL2 0x80 /* Fast data detection for RC6 */
/* Knobs for protocol decoding - will document when/if will use them */
#define ENE_CIRPF 0xFEC2
#define ENE_CIRHIGH 0xFEC3
#define ENE_CIRBIT 0xFEC4
#define ENE_CIRSTART 0xFEC5
#define ENE_CIRSTART2 0xFEC6
/* Actual register which contains RLC RX data - read by firmware */
#define ENE_CIRDAT_IN 0xFEC7
/* RLC configuration - sample period (1us resolution) + idle mode */
#define ENE_CIRRLC_CFG 0xFEC8
#define ENE_CIRRLC_CFG_OVERFLOW 0x80 /* interrupt on overflows if set */
#define ENE_DEFAULT_SAMPLE_PERIOD 50
/* Two byte RLC TX buffer */
#define ENE_CIRRLC_OUT0 0xFEC9
#define ENE_CIRRLC_OUT1 0xFECA
#define ENE_CIRRLC_OUT_PULSE 0x80 /* Transmitted sample is pulse */
#define ENE_CIRRLC_OUT_MASK 0x7F
/* Carrier detect setting
* Low nibble - number of carrier pulses to average
* High nibble - number of initial carrier pulses to discard
*/
#define ENE_CIRCAR_PULS 0xFECB
/* detected RX carrier period (resolution: 500 ns) */
#define ENE_CIRCAR_PRD 0xFECC
#define ENE_CIRCAR_PRD_VALID 0x80 /* data valid content valid */
/* detected RX carrier pulse width (resolution: 500 ns) */
#define ENE_CIRCAR_HPRD 0xFECD
/* TX period (resolution: 500 ns, minimum 2)*/
#define ENE_CIRMOD_PRD 0xFECE
#define ENE_CIRMOD_PRD_POL 0x80 /* TX carrier polarity*/
#define ENE_CIRMOD_PRD_MAX 0x7F /* 15.87 kHz */
#define ENE_CIRMOD_PRD_MIN 0x02 /* 1 Mhz */
/* TX pulse width (resolution: 500 ns)*/
#define ENE_CIRMOD_HPRD 0xFECF
/* Hardware versions */
#define ENE_ECHV 0xFF00 /* hardware revision */
#define ENE_PLLFRH 0xFF16
#define ENE_PLLFRL 0xFF17
#define ENE_DEFAULT_PLL_FREQ 1000
#define ENE_ECSTS 0xFF1D
#define ENE_ECSTS_RSRVD 0x04
#define ENE_ECVER_MAJOR 0xFF1E /* chip version */
#define ENE_ECVER_MINOR 0xFF1F
#define ENE_HW_VER_OLD 0xFD00
/******************************************************************************/
#define ENE_DRIVER_NAME "ene_ir"
#define ENE_IRQ_RX 1
#define ENE_IRQ_TX 2
#define ENE_HW_B 1 /* 3926B */
#define ENE_HW_C 2 /* 3926C */
#define ENE_HW_D 3 /* 3926D or later */
#define __dbg(level, format, ...) \
do { \
if (debug >= level) \
pr_info(format "\n", ## __VA_ARGS__); \
} while (0)
#define dbg(format, ...) __dbg(1, format, ## __VA_ARGS__)
#define dbg_verbose(format, ...) __dbg(2, format, ## __VA_ARGS__)
#define dbg_regs(format, ...) __dbg(3, format, ## __VA_ARGS__)
struct ene_device {
struct pnp_dev *pnp_dev;
struct rc_dev *rdev;
/* hw IO settings */
long hw_io;
int irq;
spinlock_t hw_lock;
/* HW features */
int hw_revision; /* hardware revision */
bool hw_use_gpio_0a; /* gpio0a is demodulated input*/
bool hw_extra_buffer; /* hardware has 'extra buffer' */
bool hw_fan_input; /* fan input is IR data source */
bool hw_learning_and_tx_capable; /* learning & tx capable */
int pll_freq;
int buffer_len;
/* Extra RX buffer location */
int extra_buf1_address;
int extra_buf1_len;
int extra_buf2_address;
int extra_buf2_len;
/* HW state*/
int r_pointer; /* pointer to next sample to read */
int w_pointer; /* pointer to next sample hw will write */
bool rx_fan_input_inuse; /* is fan input in use for rx*/
int tx_reg; /* current reg used for TX */
u8 saved_conf1; /* saved FEC0 reg */
unsigned int tx_sample; /* current sample for TX */
bool tx_sample_pulse; /* current sample is pulse */
/* TX buffer */
unsigned *tx_buffer; /* input samples buffer*/
int tx_pos; /* position in that buffer */
int tx_len; /* current len of tx buffer */
int tx_done; /* done transmitting */
/* one more sample pending*/
struct completion tx_complete; /* TX completion */
struct timer_list tx_sim_timer;
/* TX settings */
int tx_period;
int tx_duty_cycle;
int transmitter_mask;
/* RX settings */
bool learning_mode_enabled; /* learning input enabled */
bool carrier_detect_enabled; /* carrier detect enabled */
int rx_period_adjust;
bool rx_enabled;
};
static int ene_irq_status(struct ene_device *dev);
static void ene_rx_read_hw_pointer(struct ene_device *dev);
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