diff options
Diffstat (limited to 'drivers/media/IR/ene_ir.c')
| -rw-r--r-- | drivers/media/IR/ene_ir.c | 1217 |
1 files changed, 0 insertions, 1217 deletions
diff --git a/drivers/media/IR/ene_ir.c b/drivers/media/IR/ene_ir.c deleted file mode 100644 index 7637babcd262..000000000000 --- a/drivers/media/IR/ene_ir.c +++ /dev/null @@ -1,1217 +0,0 @@ -/* - * driver for ENE KB3926 B/C/D/E/F CIR (pnp id: ENE0XXX) - * - * Copyright (C) 2010 Maxim Levitsky <maximlevitsky@gmail.com> - * - * 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 - * - * Special thanks to: - * Sami R. <maesesami@gmail.com> for lot of help in debugging and therefore - * bringing to life support for transmission & learning mode. - * - * Charlie Andrews <charliethepilot@googlemail.com> for lots of help in - * bringing up the support of new firmware buffer that is popular - * on latest notebooks - * - * ENE for partial device documentation - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/pnp.h> -#include <linux/io.h> -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/input.h> -#include <media/ir-core.h> -#include <media/ir-common.h> -#include "ene_ir.h" - -static int sample_period; -static bool learning_mode_force; -static int debug; -static bool txsim; - -static void ene_set_reg_addr(struct ene_device *dev, u16 reg) -{ - outb(reg >> 8, dev->hw_io + ENE_ADDR_HI); - outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO); -} - -/* read a hardware register */ -static u8 ene_read_reg(struct ene_device *dev, u16 reg) -{ - u8 retval; - ene_set_reg_addr(dev, reg); - retval = inb(dev->hw_io + ENE_IO); - dbg_regs("reg %04x == %02x", reg, retval); - return retval; -} - -/* write a hardware register */ -static void ene_write_reg(struct ene_device *dev, u16 reg, u8 value) -{ - dbg_regs("reg %04x <- %02x", reg, value); - ene_set_reg_addr(dev, reg); - outb(value, dev->hw_io + ENE_IO); -} - -/* Set bits in hardware register */ -static void ene_set_reg_mask(struct ene_device *dev, u16 reg, u8 mask) -{ - dbg_regs("reg %04x |= %02x", reg, mask); - ene_set_reg_addr(dev, reg); - outb(inb(dev->hw_io + ENE_IO) | mask, dev->hw_io + ENE_IO); -} - -/* Clear bits in hardware register */ -static void ene_clear_reg_mask(struct ene_device *dev, u16 reg, u8 mask) -{ - dbg_regs("reg %04x &= ~%02x ", reg, mask); - ene_set_reg_addr(dev, reg); - outb(inb(dev->hw_io + ENE_IO) & ~mask, dev->hw_io + ENE_IO); -} - -/* A helper to set/clear a bit in register according to boolean variable */ -static void ene_set_clear_reg_mask(struct ene_device *dev, u16 reg, u8 mask, - bool set) -{ - if (set) - ene_set_reg_mask(dev, reg, mask); - else - ene_clear_reg_mask(dev, reg, mask); -} - -/* detect hardware features */ -static int ene_hw_detect(struct ene_device *dev) -{ - u8 chip_major, chip_minor; - u8 hw_revision, old_ver; - u8 fw_reg2, fw_reg1; - - ene_clear_reg_mask(dev, ENE_ECSTS, ENE_ECSTS_RSRVD); - chip_major = ene_read_reg(dev, ENE_ECVER_MAJOR); - chip_minor = ene_read_reg(dev, ENE_ECVER_MINOR); - ene_set_reg_mask(dev, ENE_ECSTS, ENE_ECSTS_RSRVD); - - hw_revision = ene_read_reg(dev, ENE_ECHV); - old_ver = ene_read_reg(dev, ENE_HW_VER_OLD); - - dev->pll_freq = (ene_read_reg(dev, ENE_PLLFRH) << 4) + - (ene_read_reg(dev, ENE_PLLFRL) >> 4); - - if (sample_period != ENE_DEFAULT_SAMPLE_PERIOD) - dev->rx_period_adjust = - dev->pll_freq == ENE_DEFAULT_PLL_FREQ ? 2 : 4; - - if (hw_revision == 0xFF) { - ene_warn("device seems to be disabled"); - ene_warn("send a mail to lirc-list@lists.sourceforge.net"); - ene_warn("please attach output of acpidump and dmidecode"); - return -ENODEV; - } - - ene_notice("chip is 0x%02x%02x - kbver = 0x%02x, rev = 0x%02x", - chip_major, chip_minor, old_ver, hw_revision); - - ene_notice("PLL freq = %d", dev->pll_freq); - - if (chip_major == 0x33) { - ene_warn("chips 0x33xx aren't supported"); - return -ENODEV; - } - - if (chip_major == 0x39 && chip_minor == 0x26 && hw_revision == 0xC0) { - dev->hw_revision = ENE_HW_C; - ene_notice("KB3926C detected"); - } else if (old_ver == 0x24 && hw_revision == 0xC0) { - dev->hw_revision = ENE_HW_B; - ene_notice("KB3926B detected"); - } else { - dev->hw_revision = ENE_HW_D; - ene_notice("KB3926D or higher detected"); - } - - /* detect features hardware supports */ - if (dev->hw_revision < ENE_HW_C) - return 0; - - fw_reg1 = ene_read_reg(dev, ENE_FW1); - fw_reg2 = ene_read_reg(dev, ENE_FW2); - - ene_notice("Firmware regs: %02x %02x", fw_reg1, fw_reg2); - - dev->hw_use_gpio_0a = !!(fw_reg2 & ENE_FW2_GP0A); - dev->hw_learning_and_tx_capable = !!(fw_reg2 & ENE_FW2_LEARNING); - dev->hw_extra_buffer = !!(fw_reg1 & ENE_FW1_HAS_EXTRA_BUF); - - if (dev->hw_learning_and_tx_capable) - dev->hw_fan_input = !!(fw_reg2 & ENE_FW2_FAN_INPUT); - - ene_notice("Hardware features:"); - - if (dev->hw_learning_and_tx_capable) { - ene_notice("* Supports transmitting & learning mode"); - ene_notice(" This feature is rare and therefore,"); - ene_notice(" you are welcome to test it,"); - ene_notice(" and/or contact the author via:"); - ene_notice(" lirc-list@lists.sourceforge.net"); - ene_notice(" or maximlevitsky@gmail.com"); - - ene_notice("* Uses GPIO %s for IR raw input", - dev->hw_use_gpio_0a ? "40" : "0A"); - - if (dev->hw_fan_input) - ene_notice("* Uses unused fan feedback input as source" - " of demodulated IR data"); - } - - if (!dev->hw_fan_input) - ene_notice("* Uses GPIO %s for IR demodulated input", - dev->hw_use_gpio_0a ? "0A" : "40"); - - if (dev->hw_extra_buffer) - ene_notice("* Uses new style input buffer"); - return 0; -} - -/* Read properities of hw sample buffer */ -static void ene_rx_setup_hw_buffer(struct ene_device *dev) -{ - u16 tmp; - - ene_rx_read_hw_pointer(dev); - dev->r_pointer = dev->w_pointer; - - if (!dev->hw_extra_buffer) { - dev->buffer_len = ENE_FW_PACKET_SIZE * 2; - return; - } - - tmp = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER); - tmp |= ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER+1) << 8; - dev->extra_buf1_address = tmp; - - dev->extra_buf1_len = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 2); - - tmp = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 3); - tmp |= ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 4) << 8; - dev->extra_buf2_address = tmp; - - dev->extra_buf2_len = ene_read_reg(dev, ENE_FW_SAMPLE_BUFFER + 5); - - dev->buffer_len = dev->extra_buf1_len + dev->extra_buf2_len + 8; - - ene_notice("Hardware uses 2 extended buffers:"); - ene_notice(" 0x%04x - len : %d", dev->extra_buf1_address, - dev->extra_buf1_len); - ene_notice(" 0x%04x - len : %d", dev->extra_buf2_address, - dev->extra_buf2_len); - - ene_notice("Total buffer len = %d", dev->buffer_len); - - if (dev->buffer_len > 64 || dev->buffer_len < 16) - goto error; - - if (dev->extra_buf1_address > 0xFBFC || - dev->extra_buf1_address < 0xEC00) - goto error; - - if (dev->extra_buf2_address > 0xFBFC || - dev->extra_buf2_address < 0xEC00) - goto error; - - if (dev->r_pointer > dev->buffer_len) - goto error; - - ene_set_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND); - return; -error: - ene_warn("Error validating extra buffers, device probably won't work"); - dev->hw_extra_buffer = false; - ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND); -} - - -/* Restore the pointers to extra buffers - to make module reload work*/ -static void ene_rx_restore_hw_buffer(struct ene_device *dev) -{ - if (!dev->hw_extra_buffer) - return; - - ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 0, - dev->extra_buf1_address & 0xFF); - ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 1, - dev->extra_buf1_address >> 8); - ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 2, dev->extra_buf1_len); - - ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 3, - dev->extra_buf2_address & 0xFF); - ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 4, - dev->extra_buf2_address >> 8); - ene_write_reg(dev, ENE_FW_SAMPLE_BUFFER + 5, - dev->extra_buf2_len); - ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND); -} - -/* Read hardware write pointer */ -static void ene_rx_read_hw_pointer(struct ene_device *dev) -{ - if (dev->hw_extra_buffer) - dev->w_pointer = ene_read_reg(dev, ENE_FW_RX_POINTER); - else - dev->w_pointer = ene_read_reg(dev, ENE_FW2) - & ENE_FW2_BUF_WPTR ? 0 : ENE_FW_PACKET_SIZE; - - dbg_verbose("RB: HW write pointer: %02x, driver read pointer: %02x", - dev->w_pointer, dev->r_pointer); -} - -/* Gets address of next sample from HW ring buffer */ -static int ene_rx_get_sample_reg(struct ene_device *dev) -{ - int r_pointer; - - if (dev->r_pointer == dev->w_pointer) { - dbg_verbose("RB: hit end, try update w_pointer"); - ene_rx_read_hw_pointer(dev); - } - - if (dev->r_pointer == dev->w_pointer) { - dbg_verbose("RB: end of data at %d", dev->r_pointer); - return 0; - } - - dbg_verbose("RB: reading at offset %d", dev->r_pointer); - r_pointer = dev->r_pointer; - - dev->r_pointer++; - if (dev->r_pointer == dev->buffer_len) - dev->r_pointer = 0; - - dbg_verbose("RB: next read will be from offset %d", dev->r_pointer); - - if (r_pointer < 8) { - dbg_verbose("RB: read at main buffer at %d", r_pointer); - return ENE_FW_SAMPLE_BUFFER + r_pointer; - } - - r_pointer -= 8; - - if (r_pointer < dev->extra_buf1_len) { - dbg_verbose("RB: read at 1st extra buffer at %d", r_pointer); - return dev->extra_buf1_address + r_pointer; - } - - r_pointer -= dev->extra_buf1_len; - - if (r_pointer < dev->extra_buf2_len) { - dbg_verbose("RB: read at 2nd extra buffer at %d", r_pointer); - return dev->extra_buf2_address + r_pointer; - } - - dbg("attempt to read beyong ring bufer end"); - return 0; -} - -/* Sense current received carrier */ -void ene_rx_sense_carrier(struct ene_device *dev) -{ - DEFINE_IR_RAW_EVENT(ev); - - int carrier, duty_cycle; - int period = ene_read_reg(dev, ENE_CIRCAR_PRD); - int hperiod = ene_read_reg(dev, ENE_CIRCAR_HPRD); - - if (!(period & ENE_CIRCAR_PRD_VALID)) - return; - - period &= ~ENE_CIRCAR_PRD_VALID; - - if (!period) - return; - - dbg("RX: hardware carrier period = %02x", period); - dbg("RX: hardware carrier pulse period = %02x", hperiod); - - carrier = 2000000 / period; - duty_cycle = (hperiod * 100) / period; - dbg("RX: sensed carrier = %d Hz, duty cycle %d%%", - carrier, duty_cycle); - if (dev->carrier_detect_enabled) { - ev.carrier_report = true; - ev.carrier = carrier; - ev.duty_cycle = duty_cycle; - ir_raw_event_store(dev->idev, &ev); - } -} - -/* this enables/disables the CIR RX engine */ -static void ene_rx_enable_cir_engine(struct ene_device *dev, bool enable) -{ - ene_set_clear_reg_mask(dev, ENE_CIRCFG, - ENE_CIRCFG_RX_EN | ENE_CIRCFG_RX_IRQ, enable); -} - -/* this selects input for CIR engine. Ether GPIO 0A or GPIO40*/ -static void ene_rx_select_input(struct ene_device *dev, bool gpio_0a) -{ - ene_set_clear_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_GPIO0A, gpio_0a); -} - -/* - * this enables alternative input via fan tachometer sensor and bypasses - * the hw CIR engine - */ -static void ene_rx_enable_fan_input(struct ene_device *dev, bool enable) -{ - if (!dev->hw_fan_input) - return; - - if (!enable) - ene_write_reg(dev, ENE_FAN_AS_IN1, 0); - else { - ene_write_reg(dev, ENE_FAN_AS_IN1, ENE_FAN_AS_IN1_EN); - ene_write_reg(dev, ENE_FAN_AS_IN2, ENE_FAN_AS_IN2_EN); - } -} - -/* setup the receiver for RX*/ -static void ene_rx_setup(struct ene_device *dev) -{ - bool learning_mode = dev->learning_mode_enabled || - dev->carrier_detect_enabled; - int sample_period_adjust = 0; - - dbg("RX: setup receiver, learning mode = %d", learning_mode); - - - /* This selects RLC input and clears CFG2 settings */ - ene_write_reg(dev, ENE_CIRCFG2, 0x00); - - /* set sample period*/ - if (sample_period == ENE_DEFAULT_SAMPLE_PERIOD) - sample_period_adjust = - dev->pll_freq == ENE_DEFAULT_PLL_FREQ ? 1 : 2; - - ene_write_reg(dev, ENE_CIRRLC_CFG, - (sample_period + sample_period_adjust) | - ENE_CIRRLC_CFG_OVERFLOW); - /* revB doesn't support inputs */ - if (dev->hw_revision < ENE_HW_C) - goto select_timeout; - - if (learning_mode) { - - WARN_ON(!dev->hw_learning_and_tx_capable); - - /* Enable the opposite of the normal input - That means that if GPIO40 is normally used, use GPIO0A - and vice versa. - This input will carry non demodulated - signal, and we will tell the hw to demodulate it itself */ - ene_rx_select_input(dev, !dev->hw_use_gpio_0a); - dev->rx_fan_input_inuse = false; - - /* Enable carrier demodulation */ - ene_set_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_CARR_DEMOD); - - /* Enable carrier detection */ - ene_write_reg(dev, ENE_CIRCAR_PULS, 0x63); - ene_set_clear_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_CARR_DETECT, - dev->carrier_detect_enabled || debug); - } else { - if (dev->hw_fan_input) - dev->rx_fan_input_inuse = true; - else - ene_rx_select_input(dev, dev->hw_use_gpio_0a); - - /* Disable carrier detection & demodulation */ - ene_clear_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_CARR_DEMOD); - ene_clear_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_CARR_DETECT); - } - -select_timeout: - if (dev->rx_fan_input_inuse) { - dev->props->rx_resolution = MS_TO_NS(ENE_FW_SAMPLE_PERIOD_FAN); - - /* Fan input doesn't support timeouts, it just ends the - input with a maximum sample */ - dev->props->min_timeout = dev->props->max_timeout = - MS_TO_NS(ENE_FW_SMPL_BUF_FAN_MSK * - ENE_FW_SAMPLE_PERIOD_FAN); - } else { - dev->props->rx_resolution = MS_TO_NS(sample_period); - - /* Theoreticly timeout is unlimited, but we cap it - * because it was seen that on one device, it - * would stop sending spaces after around 250 msec. - * Besides, this is close to 2^32 anyway and timeout is u32. - */ - dev->props->min_timeout = MS_TO_NS(127 * sample_period); - dev->props->max_timeout = MS_TO_NS(200000); - } - - if (dev->hw_learning_and_tx_capable) - dev->props->tx_resolution = MS_TO_NS(sample_period); - - if (dev->props->timeout > dev->props->max_timeout) - dev->props->timeout = dev->props->max_timeout; - if (dev->props->timeout < dev->props->min_timeout) - dev->props->timeout = dev->props->min_timeout; -} - -/* Enable the device for receive */ -static void ene_rx_enable(struct ene_device *dev) -{ - u8 reg_value; - - /* Enable system interrupt */ - if (dev->hw_revision < ENE_HW_C) { - ene_write_reg(dev, ENEB_IRQ, dev->irq << 1); - ene_write_reg(dev, ENEB_IRQ_UNK1, 0x01); - } else { - reg_value = ene_read_reg(dev, ENE_IRQ) & 0xF0; - reg_value |= ENE_IRQ_UNK_EN; - reg_value &= ~ENE_IRQ_STATUS; - reg_value |= (dev->irq & ENE_IRQ_MASK); - ene_write_reg(dev, ENE_IRQ, reg_value); - } - - /* Enable inputs */ - ene_rx_enable_fan_input(dev, dev->rx_fan_input_inuse); - ene_rx_enable_cir_engine(dev, !dev->rx_fan_input_inuse); - - /* ack any pending irqs - just in case */ - ene_irq_status(dev); - - /* enable firmware bits */ - ene_set_reg_mask(dev, ENE_FW1, ENE_FW1_ENABLE | ENE_FW1_IRQ); - - /* enter idle mode */ - ir_raw_event_set_idle(dev->idev, true); - dev->rx_enabled = true; -} - -/* Disable the device receiver */ -static void ene_rx_disable(struct ene_device *dev) -{ - /* disable inputs */ - ene_rx_enable_cir_engine(dev, false); - ene_rx_enable_fan_input(dev, false); - - /* disable hardware IRQ and firmware flag */ - ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_ENABLE | ENE_FW1_IRQ); - - ir_raw_event_set_idle(dev->idev, true); - dev->rx_enabled = false; -} - -/* This resets the receiver. Usefull to stop stream of spaces at end of - * transmission - */ -static void ene_rx_reset(struct ene_device *dev) -{ - ene_clear_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_RX_EN); - ene_set_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_RX_EN); -} - -/* Set up the TX carrier frequency and duty cycle */ -static void ene_tx_set_carrier(struct ene_device *dev) -{ - u8 tx_puls_width; - unsigned long flags; - - spin_lock_irqsave(&dev->hw_lock, flags); - - ene_set_clear_reg_mask(dev, ENE_CIRCFG, - ENE_CIRCFG_TX_CARR, dev->tx_period > 0); - - if (!dev->tx_period) - goto unlock; - - BUG_ON(dev->tx_duty_cycle >= 100 || dev->tx_duty_cycle <= 0); - - tx_puls_width = dev->tx_period / (100 / dev->tx_duty_cycle); - - if (!tx_puls_width) - tx_puls_width = 1; - - dbg("TX: pulse distance = %d * 500 ns", dev->tx_period); - dbg("TX: pulse width = %d * 500 ns", tx_puls_width); - - ene_write_reg(dev, ENE_CIRMOD_PRD, dev->tx_period | ENE_CIRMOD_PRD_POL); - ene_write_reg(dev, ENE_CIRMOD_HPRD, tx_puls_width); -unlock: - spin_unlock_irqrestore(&dev->hw_lock, flags); -} - -/* Enable/disable transmitters */ -static void ene_tx_set_transmitters(struct ene_device *dev) -{ - unsigned long flags; - - spin_lock_irqsave(&dev->hw_lock, flags); - ene_set_clear_reg_mask(dev, ENE_GPIOFS8, ENE_GPIOFS8_GPIO41, - !!(dev->transmitter_mask & 0x01)); - ene_set_clear_reg_mask(dev, ENE_GPIOFS1, ENE_GPIOFS1_GPIO0D, - !!(dev->transmitter_mask & 0x02)); - spin_unlock_irqrestore(&dev->hw_lock, flags); -} - -/* prepare transmission */ -static void ene_tx_enable(struct ene_device *dev) -{ - u8 conf1 = ene_read_reg(dev, ENE_CIRCFG); - u8 fwreg2 = ene_read_reg(dev, ENE_FW2); - - dev->saved_conf1 = conf1; - - /* Show information about currently connected transmitter jacks */ - if (fwreg2 & ENE_FW2_EMMITER1_CONN) - dbg("TX: Transmitter #1 is connected"); - - if (fwreg2 & ENE_FW2_EMMITER2_CONN) - dbg("TX: Transmitter #2 is connected"); - - if (!(fwreg2 & (ENE_FW2_EMMITER1_CONN | ENE_FW2_EMMITER2_CONN))) - ene_warn("TX: transmitter cable isn't connected!"); - - /* disable receive on revc */ - if (dev->hw_revision == ENE_HW_C) - conf1 &= ~ENE_CIRCFG_RX_EN; - - /* Enable TX engine */ - conf1 |= ENE_CIRCFG_TX_EN | ENE_CIRCFG_TX_IRQ; - ene_write_reg(dev, ENE_CIRCFG, conf1); -} - -/* end transmission */ -static void ene_tx_disable(struct ene_device *dev) -{ - ene_write_reg(dev, ENE_CIRCFG, dev->saved_conf1); - dev->tx_buffer = NULL; -} - - -/* TX one sample - must be called with dev->hw_lock*/ -static void ene_tx_sample(struct ene_device *dev) -{ - u8 raw_tx; - u32 sample; - bool pulse = dev->tx_sample_pulse; - - if (!dev->tx_buffer) { - ene_warn("TX: BUG: attempt to transmit NULL buffer"); - return; - } - - /* Grab next TX sample */ - if (!dev->tx_sample) { - - if (dev->tx_pos == dev->tx_len) { - if (!dev->tx_done) { - dbg("TX: no more data to send"); - dev->tx_done = true; - goto exit; - } else { - dbg("TX: last sample sent by hardware"); - ene_tx_disable(dev); - complete(&dev->tx_complete); - return; - } - } - - sample = dev->tx_buffer[dev->tx_pos++]; - dev->tx_sample_pulse = !dev->tx_sample_pulse; - - dev->tx_sample = DIV_ROUND_CLOSEST(sample, sample_period); - - if (!dev->tx_sample) - dev->tx_sample = 1; - } - - raw_tx = min(dev->tx_sample , (unsigned int)ENE_CIRRLC_OUT_MASK); - dev->tx_sample -= raw_tx; - - dbg("TX: sample %8d (%s)", raw_tx * sample_period, - pulse ? "pulse" : "space"); - if (pulse) - raw_tx |= ENE_CIRRLC_OUT_PULSE; - - ene_write_reg(dev, - dev->tx_reg ? ENE_CIRRLC_OUT1 : ENE_CIRRLC_OUT0, raw_tx); - - dev->tx_reg = !dev->tx_reg; -exit: - /* simulate TX done interrupt */ - if (txsim) - mod_timer(&dev->tx_sim_timer, jiffies + HZ / 500); -} - -/* timer to simulate tx done interrupt */ -static void ene_tx_irqsim(unsigned long data) -{ - struct ene_device *dev = (struct ene_device *)data; - unsigned long flags; - - spin_lock_irqsave(&dev->hw_lock, flags); - ene_tx_sample(dev); - spin_unlock_irqrestore(&dev->hw_lock, flags); -} - - -/* read irq status and ack it */ -static int ene_irq_status(struct ene_device *dev) -{ - u8 irq_status; - u8 fw_flags1, fw_flags2; - int retval = 0; - - fw_flags2 = ene_read_reg(dev, ENE_FW2); - - if (dev->hw_revision < ENE_HW_C) { - irq_status = ene_read_reg(dev, ENEB_IRQ_STATUS); - - if (!(irq_status & ENEB_IRQ_STATUS_IR)) - return 0; - - ene_clear_reg_mask(dev, ENEB_IRQ_STATUS, ENEB_IRQ_STATUS_IR); - return ENE_IRQ_RX; - } - - irq_status = ene_read_reg(dev, ENE_IRQ); - if (!(irq_status & ENE_IRQ_STATUS)) - return 0; - - /* original driver does that twice - a workaround ? */ - ene_write_reg(dev, ENE_IRQ, irq_status & ~ENE_IRQ_STATUS); - ene_write_reg(dev, ENE_IRQ, irq_status & ~ENE_IRQ_STATUS); - - /* check RX interrupt */ - if (fw_flags2 & ENE_FW2_RXIRQ) { - retval |= ENE_IRQ_RX; - ene_write_reg(dev, ENE_FW2, fw_flags2 & ~ENE_FW2_RXIRQ); - } - - /* check TX interrupt */ - fw_flags1 = ene_read_reg(dev, ENE_FW1); - if (fw_flags1 & ENE_FW1_TXIRQ) { - ene_write_reg(dev, ENE_FW1, fw_flags1 & ~ENE_FW1_TXIRQ); - retval |= ENE_IRQ_TX; - } - - return retval; -} - -/* interrupt handler */ -static irqreturn_t ene_isr(int irq, void *data) -{ - u16 hw_value, reg; - int hw_sample, irq_status; - bool pulse; - unsigned long flags; - irqreturn_t retval = IRQ_NONE; - struct ene_device *dev = (struct ene_device *)data; - DEFINE_IR_RAW_EVENT(ev); - - spin_lock_irqsave(&dev->hw_lock, flags); - - dbg_verbose("ISR called"); - ene_rx_read_hw_pointer(dev); - irq_status = ene_irq_status(dev); - - if (!irq_status) - goto unlock; - - retval = IRQ_HANDLED; - - if (irq_status & ENE_IRQ_TX) { - dbg_verbose("TX interrupt"); - if (!dev->hw_learning_and_tx_capable) { - dbg("TX interrupt on unsupported device!"); - goto unlock; - } - ene_tx_sample(dev); - } - - if (!(irq_status & ENE_IRQ_RX)) - goto unlock; - - dbg_verbose("RX interrupt"); - - if (dev->hw_learning_and_tx_capable) - ene_rx_sense_carrier(dev); - - /* On hardware that don't support extra buffer we need to trust - the interrupt and not track the read pointer */ - if (!dev->hw_extra_buffer) - dev->r_pointer = dev->w_pointer == 0 ? ENE_FW_PACKET_SIZE : 0; - - while (1) { - - reg = ene_rx_get_sample_reg(dev); - - dbg_verbose("next sample to read at: %04x", reg); - if (!reg) - break; - - hw_value = ene_read_reg(dev, reg); - - if (dev->rx_fan_input_inuse) { - - int offset = ENE_FW_SMPL_BUF_FAN - ENE_FW_SAMPLE_BUFFER; - - /* read high part of the sample */ - hw_value |= ene_read_reg(dev, reg + offset) << 8; - pulse = hw_value & ENE_FW_SMPL_BUF_FAN_PLS; - - /* clear space bit, and other unused bits */ - hw_value &= ENE_FW_SMPL_BUF_FAN_MSK; - hw_sample = hw_value * ENE_FW_SAMPLE_PERIOD_FAN; - - } else { - pulse = !(hw_value & ENE_FW_SAMPLE_SPACE); - hw_value &= ~ENE_FW_SAMPLE_SPACE; - hw_sample = hw_value * sample_period; - - if (dev->rx_period_adjust) { - hw_sample *= 100; - hw_sample /= (100 + dev->rx_period_adjust); - } - } - - if (!dev->hw_extra_buffer && !hw_sample) { - dev->r_pointer = dev->w_pointer; - continue; - } - - dbg("RX: %d (%s)", hw_sample, pulse ? "pulse" : "space"); - - ev.duration = MS_TO_NS(hw_sample); - ev.pulse = pulse; - ir_raw_event_store_with_filter(dev->idev, &ev); - } - - ir_raw_event_handle(dev->idev); -unlock: - spin_unlock_irqrestore(&dev->hw_lock, flags); - return retval; -} - -/* Initialize default settings */ -static void ene_setup_default_settings(struct ene_device *dev) -{ - dev->tx_period = 32; - dev->tx_duty_cycle = 50; /*%*/ - dev->transmitter_mask = 0x03; - dev->learning_mode_enabled = learning_mode_force; - - /* Set reasonable default timeout */ - dev->props->timeout = MS_TO_NS(150000); -} - -/* Upload all hardware settings at once. Used at load and resume time */ -static void ene_setup_hw_settings(struct ene_device *dev) -{ - if (dev->hw_learning_and_tx_capable) { - ene_tx_set_carrier(dev); - ene_tx_set_transmitters(dev); - } - - ene_rx_setup(dev); -} - -/* outside interface: called on first open*/ -static int ene_open(void *data) -{ - struct ene_device *dev = (struct ene_device *)data; - unsigned long flags; - - spin_lock_irqsave(&dev->hw_lock, flags); - ene_rx_enable(dev); - spin_unlock_irqrestore(&dev->hw_lock, flags); - return 0; -} - -/* outside interface: called on device close*/ -static void ene_close(void *data) -{ - struct ene_device *dev = (struct ene_device *)data; - unsigned long flags; - spin_lock_irqsave(&dev->hw_lock, flags); - - ene_rx_disable(dev); - spin_unlock_irqrestore(&dev->hw_lock, flags); -} - -/* outside interface: set transmitter mask */ -static int ene_set_tx_mask(void *data, u32 tx_mask) -{ - struct ene_device *dev = (struct ene_device *)data; - dbg("TX: attempt to set transmitter mask %02x", tx_mask); - - /* invalid txmask */ - if (!tx_mask || tx_mask & ~0x03) { - dbg("TX: invalid mask"); - /* return count of transmitters */ - return 2; - } - - dev->transmitter_mask = tx_mask; - ene_tx_set_transmitters(dev); - return 0; -} - -/* outside interface : set tx carrier */ -static int ene_set_tx_carrier(void *data, u32 carrier) -{ - struct ene_device *dev = (struct ene_device *)data; - u32 period = 2000000 / carrier; - - dbg("TX: attempt to set tx carrier to %d kHz", carrier); - - if (period && (period > ENE_CIRMOD_PRD_MAX || - period < ENE_CIRMOD_PRD_MIN)) { - - dbg("TX: out of range %d-%d kHz carrier", - 2000 / ENE_CIRMOD_PRD_MIN, 2000 / ENE_CIRMOD_PRD_MAX); - return -1; - } - - dev->tx_period = period; - ene_tx_set_carrier(dev); - return 0; -} - -/*outside interface : set tx duty cycle */ -static int ene_set_tx_duty_cycle(void *data, u32 duty_cycle) -{ - struct ene_device *dev = (struct ene_device *)data; - dbg("TX: setting duty cycle to %d%%", duty_cycle); - dev->tx_duty_cycle = duty_cycle; - ene_tx_set_carrier(dev); - return 0; -} - -/* outside interface: enable learning mode */ -static int ene_set_learning_mode(void *data, int enable) -{ - struct ene_device *dev = (struct ene_device *)data; - unsigned long flags; - if (enable == dev->learning_mode_enabled) - return 0; - - spin_lock_irqsave(&dev->hw_lock, flags); - dev->learning_mode_enabled = enable; - ene_rx_disable(dev); - ene_rx_setup(dev); - ene_rx_enable(dev); - spin_unlock_irqrestore(&dev->hw_lock, flags); - return 0; -} - -static int ene_set_carrier_report(void *data, int enable) -{ - struct ene_device *dev = (struct ene_device *)data; - unsigned long flags; - - if (enable == dev->carrier_detect_enabled) - return 0; - - spin_lock_irqsave(&dev->hw_lock, flags); - dev->carrier_detect_enabled = enable; - ene_rx_disable(dev); - ene_rx_setup(dev); - ene_rx_enable(dev); - spin_unlock_irqrestore(&dev->hw_lock, flags); - return 0; -} - -/* outside interface: enable or disable idle mode */ -static void ene_set_idle(void *data, bool idle) -{ - if (idle) { - ene_rx_reset((struct ene_device *)data); - dbg("RX: end of data"); - } -} - -/* outside interface: transmit */ -static int ene_transmit(void *data, int *buf, u32 n) -{ - struct ene_device *dev = (struct ene_device *)data; - unsigned long flags; - - dev->tx_buffer = buf; - dev->tx_len = n / sizeof(int); - dev->tx_pos = 0; - dev->tx_reg = 0; - dev->tx_done = 0; - dev->tx_sample = 0; - dev->tx_sample_pulse = 0; - - dbg("TX: %d samples", dev->tx_len); - - spin_lock_irqsave(&dev->hw_lock, flags); - - ene_tx_enable(dev); - - /* Transmit first two samples */ - ene_tx_sample(dev); - ene_tx_sample(dev); - - spin_unlock_irqrestore(&dev->hw_lock, flags); - - if (wait_for_completion_timeout(&dev->tx_complete, 2 * HZ) == 0) { - dbg("TX: timeout"); - spin_lock_irqsave(&dev->hw_lock, flags); - ene_tx_disable(dev); - spin_unlock_irqrestore(&dev->hw_lock, flags); - } else - dbg("TX: done"); - return n; -} - -/* probe entry */ -static int ene_probe(struct pnp_dev *pnp_dev, const struct pnp_device_id *id) -{ - int error = -ENOMEM; - struct ir_dev_props *ir_props; - struct input_dev *input_dev; - struct ene_device *dev; - - /* allocate memory */ - input_dev = input_allocate_device(); - ir_props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL); - dev = kzalloc(sizeof(struct ene_device), GFP_KERNEL); - - if (!input_dev || !ir_props || !dev) - goto error1; - - /* validate resources */ - error = -ENODEV; - - if (!pnp_port_valid(pnp_dev, 0) || - pnp_port_len(pnp_dev, 0) < ENE_IO_SIZE) - goto error; - - if (!pnp_irq_valid(pnp_dev, 0)) - goto error; - - spin_lock_init(&dev->hw_lock); - - /* claim the resources */ - error = -EBUSY; - dev->hw_io = pnp_port_start(pnp_dev, 0); - if (!request_region(dev->hw_io, ENE_IO_SIZE, ENE_DRIVER_NAME)) { - dev->hw_io = -1; - dev->irq = -1; - goto error; - } - - dev->irq = pnp_irq(pnp_dev, 0); - if (request_irq(dev->irq, ene_isr, - IRQF_SHARED, ENE_DRIVER_NAME, (void *)dev)) { - dev->irq = -1; - goto error; - } - - pnp_set_drvdata(pnp_dev, dev); - dev->pnp_dev = pnp_dev; - - /* don't allow too short/long sample periods */ - if (sample_period < 5 || sample_period > 0x7F) - sample_period = ENE_DEFAULT_SAMPLE_PERIOD; - - /* detect hardware version and features */ - error = ene_hw_detect(dev); - if (error) - goto error; - - if (!dev->hw_learning_and_tx_capable && txsim) { - dev->hw_learning_and_tx_capable = true; - setup_timer(&dev->tx_sim_timer, ene_tx_irqsim, - (long unsigned int)dev); - ene_warn("Simulation of TX activated"); - } - - if (!dev->hw_learning_and_tx_capable) - learning_mode_force = false; - - ir_props->driver_type = RC_DRIVER_IR_RAW; - ir_props->allowed_protos = IR_TYPE_ALL; - ir_props->priv = dev; - ir_props->open = ene_open; - ir_props->close = ene_close; - ir_props->s_idle = ene_set_idle; - - dev->props = ir_props; - dev->idev = input_dev; - - if (dev->hw_learning_and_tx_capable) { - ir_props->s_learning_mode = ene_set_learning_mode; - init_completion(&dev->tx_complete); - ir_props->tx_ir = ene_transmit; - ir_props->s_tx_mask = ene_set_tx_mask; - ir_props->s_tx_carrier = ene_set_tx_carrier; - ir_props->s_tx_duty_cycle = ene_set_tx_duty_cycle; - ir_props->s_carrier_report = ene_set_carrier_report; - } - - ene_rx_setup_hw_buffer(dev); - ene_setup_default_settings(dev); - ene_setup_hw_settings(dev); - - device_set_wakeup_capable(&pnp_dev->dev, true); - device_set_wakeup_enable(&pnp_dev->dev, true); - - if (dev->hw_learning_and_tx_capable) - input_dev->name = "ENE eHome Infrared Remote Transceiver"; - else - input_dev->name = "ENE eHome Infrared Remote Receiver"; - - error = -ENODEV; - if (ir_input_register(input_dev, RC_MAP_RC6_MCE, ir_props, - ENE_DRIVER_NAME)) - goto error; - - ene_notice("driver has been succesfully loaded"); - return 0; -error: - if (dev && dev->irq >= 0) - free_irq(dev->irq, dev); - if (dev && dev->hw_io >= 0) - release_region(dev->hw_io, ENE_IO_SIZE); -error1: - input_free_device(input_dev); - kfree(ir_props); - kfree(dev); - return error; -} - -/* main unload function */ -static void ene_remove(struct pnp_dev *pnp_dev) -{ - struct ene_device *dev = pnp_get_drvdata(pnp_dev); - unsigned long flags; - - spin_lock_irqsave(&dev->hw_lock, flags); - ene_rx_disable(dev); - ene_rx_restore_hw_buffer(dev); - spin_unlock_irqrestore(&dev->hw_lock, flags); - - free_irq(dev->irq, dev); - release_region(dev->hw_io, ENE_IO_SIZE); - ir_input_unregister(dev->idev); - kfree(dev->props); - kfree(dev); -} - -/* enable wake on IR (wakes on specific button on original remote) */ -static void ene_enable_wake(struct ene_device *dev, int enable) -{ - enable = enable && device_may_wakeup(&dev->pnp_dev->dev); - dbg("wake on IR %s", enable ? "enabled" : "disabled"); - ene_set_clear_reg_mask(dev, ENE_FW1, ENE_FW1_WAKE, enable); -} - -#ifdef CONFIG_PM -static int ene_suspend(struct pnp_dev *pnp_dev, pm_message_t state) -{ - struct ene_device *dev = pnp_get_drvdata(pnp_dev); - ene_enable_wake(dev, true); - - /* TODO: add support for wake pattern */ - return 0; -} - -static int ene_resume(struct pnp_dev *pnp_dev) -{ - struct ene_device *dev = pnp_get_drvdata(pnp_dev); - ene_setup_hw_settings(dev); - - if (dev->rx_enabled) - ene_rx_enable(dev); - - ene_enable_wake(dev, false); - return 0; -} -#endif - -static void ene_shutdown(struct pnp_dev *pnp_dev) -{ - struct ene_device *dev = pnp_get_drvdata(pnp_dev); - ene_enable_wake(dev, true); -} - -static const struct pnp_device_id ene_ids[] = { - {.id = "ENE0100",}, - {.id = "ENE0200",}, - {.id = "ENE0201",}, - {.id = "ENE0202",}, - {}, -}; - -static struct pnp_driver ene_driver = { - .name = ENE_DRIVER_NAME, - .id_table = ene_ids, - .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, - - .probe = ene_probe, - .remove = __devexit_p(ene_remove), -#ifdef CONFIG_PM - .suspend = ene_suspend, - .resume = ene_resume, -#endif - .shutdown = ene_shutdown, -}; - -static int __init ene_init(void) -{ - return pnp_register_driver(&ene_driver); -} - -static void ene_exit(void) -{ - pnp_unregister_driver(&ene_driver); -} - -module_param(sample_period, int, S_IRUGO); -MODULE_PARM_DESC(sample_period, "Hardware sample period (50 us default)"); - -module_param(learning_mode_force, bool, S_IRUGO); -MODULE_PARM_DESC(learning_mode_force, "Enable learning mode by default"); - -module_param(debug, int, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(debug, "Debug level"); - -module_param(txsim, bool, S_IRUGO); -MODULE_PARM_DESC(txsim, - "Simulate TX features on unsupported hardware (dangerous)"); - -MODULE_DEVICE_TABLE(pnp, ene_ids); -MODULE_DESCRIPTION - ("Infrared input driver for KB3926B/C/D/E/F " - "(aka ENE0100/ENE0200/ENE0201/ENE0202) CIR port"); - -MODULE_AUTHOR("Maxim Levitsky"); -MODULE_LICENSE("GPL"); - -module_init(ene_init); -module_exit(ene_exit); |