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492b53a50a
Use sizeof instead of ARRAY_SIZE to fix this smatch warning: drivers/media/rc/ite-cir.c:385 ite_tx_ir() warn: calling memset(x, y, ARRAY_SIZE()); Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Acked-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
1701 lines
46 KiB
C
1701 lines
46 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for ITE Tech Inc. IT8712F/IT8512 CIR
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*
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* Copyright (C) 2010 Juan Jesús García de Soria <skandalfo@gmail.com>
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*
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* Inspired by the original lirc_it87 and lirc_ite8709 drivers, on top of the
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* skeleton provided by the nuvoton-cir driver.
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*
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* The lirc_it87 driver was originally written by Hans-Gunter Lutke Uphues
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* <hg_lu@web.de> in 2001, with enhancements by Christoph Bartelmus
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* <lirc@bartelmus.de>, Andrew Calkin <r_tay@hotmail.com> and James Edwards
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* <jimbo-lirc@edwardsclan.net>.
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*
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* The lirc_ite8709 driver was written by Grégory Lardière
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* <spmf2004-lirc@yahoo.fr> in 2008.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pnp.h>
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/bitops.h>
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#include <media/rc-core.h>
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#include <linux/pci_ids.h>
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#include "ite-cir.h"
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/* module parameters */
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/* debug level */
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static int debug;
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module_param(debug, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "Enable debugging output");
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/* low limit for RX carrier freq, Hz, 0 for no RX demodulation */
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static int rx_low_carrier_freq;
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module_param(rx_low_carrier_freq, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(rx_low_carrier_freq, "Override low RX carrier frequency, Hz, 0 for no RX demodulation");
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/* high limit for RX carrier freq, Hz, 0 for no RX demodulation */
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static int rx_high_carrier_freq;
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module_param(rx_high_carrier_freq, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(rx_high_carrier_freq, "Override high RX carrier frequency, Hz, 0 for no RX demodulation");
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/* override tx carrier frequency */
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static int tx_carrier_freq;
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module_param(tx_carrier_freq, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(tx_carrier_freq, "Override TX carrier frequency, Hz");
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/* override tx duty cycle */
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static int tx_duty_cycle;
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module_param(tx_duty_cycle, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(tx_duty_cycle, "Override TX duty cycle, 1-100");
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/* override default sample period */
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static long sample_period;
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module_param(sample_period, long, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(sample_period, "Override carrier sample period, us");
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/* override detected model id */
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static int model_number = -1;
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module_param(model_number, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(model_number, "Use this model number, don't autodetect");
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/* HW-independent code functions */
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/* check whether carrier frequency is high frequency */
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static inline bool ite_is_high_carrier_freq(unsigned int freq)
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{
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return freq >= ITE_HCF_MIN_CARRIER_FREQ;
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}
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/* get the bits required to program the carrier frequency in CFQ bits,
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* unshifted */
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static u8 ite_get_carrier_freq_bits(unsigned int freq)
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{
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if (ite_is_high_carrier_freq(freq)) {
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if (freq < 425000)
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return ITE_CFQ_400;
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else if (freq < 465000)
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return ITE_CFQ_450;
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else if (freq < 490000)
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return ITE_CFQ_480;
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else
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return ITE_CFQ_500;
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} else {
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/* trim to limits */
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if (freq < ITE_LCF_MIN_CARRIER_FREQ)
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freq = ITE_LCF_MIN_CARRIER_FREQ;
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if (freq > ITE_LCF_MAX_CARRIER_FREQ)
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freq = ITE_LCF_MAX_CARRIER_FREQ;
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/* convert to kHz and subtract the base freq */
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freq =
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DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ,
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1000);
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return (u8) freq;
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}
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}
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/* get the bits required to program the pulse with in TXMPW */
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static u8 ite_get_pulse_width_bits(unsigned int freq, int duty_cycle)
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{
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unsigned long period_ns, on_ns;
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/* sanitize freq into range */
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if (freq < ITE_LCF_MIN_CARRIER_FREQ)
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freq = ITE_LCF_MIN_CARRIER_FREQ;
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if (freq > ITE_HCF_MAX_CARRIER_FREQ)
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freq = ITE_HCF_MAX_CARRIER_FREQ;
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period_ns = 1000000000UL / freq;
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on_ns = period_ns * duty_cycle / 100;
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if (ite_is_high_carrier_freq(freq)) {
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if (on_ns < 750)
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return ITE_TXMPW_A;
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else if (on_ns < 850)
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return ITE_TXMPW_B;
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else if (on_ns < 950)
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return ITE_TXMPW_C;
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else if (on_ns < 1080)
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return ITE_TXMPW_D;
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else
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return ITE_TXMPW_E;
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} else {
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if (on_ns < 6500)
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return ITE_TXMPW_A;
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else if (on_ns < 7850)
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return ITE_TXMPW_B;
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else if (on_ns < 9650)
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return ITE_TXMPW_C;
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else if (on_ns < 11950)
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return ITE_TXMPW_D;
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else
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return ITE_TXMPW_E;
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}
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}
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/* decode raw bytes as received by the hardware, and push them to the ir-core
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* layer */
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static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int
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length)
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{
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u32 sample_period;
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unsigned long *ldata;
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unsigned int next_one, next_zero, size;
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struct ir_raw_event ev = {};
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if (length == 0)
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return;
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sample_period = dev->params.sample_period;
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ldata = (unsigned long *)data;
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size = length << 3;
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next_one = find_next_bit_le(ldata, size, 0);
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if (next_one > 0) {
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ev.pulse = true;
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ev.duration =
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ITE_BITS_TO_NS(next_one, sample_period);
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ir_raw_event_store_with_filter(dev->rdev, &ev);
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}
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while (next_one < size) {
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next_zero = find_next_zero_bit_le(ldata, size, next_one + 1);
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ev.pulse = false;
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ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period);
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ir_raw_event_store_with_filter(dev->rdev, &ev);
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if (next_zero < size) {
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next_one =
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find_next_bit_le(ldata,
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size,
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next_zero + 1);
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ev.pulse = true;
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ev.duration =
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ITE_BITS_TO_NS(next_one - next_zero,
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sample_period);
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ir_raw_event_store_with_filter
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(dev->rdev, &ev);
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} else
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next_one = size;
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}
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ir_raw_event_handle(dev->rdev);
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ite_dbg_verbose("decoded %d bytes.", length);
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}
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/* set all the rx/tx carrier parameters; this must be called with the device
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* spinlock held */
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static void ite_set_carrier_params(struct ite_dev *dev)
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{
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unsigned int freq, low_freq, high_freq;
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int allowance;
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bool use_demodulator;
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bool for_tx = dev->transmitting;
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ite_dbg("%s called", __func__);
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if (for_tx) {
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/* we don't need no stinking calculations */
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freq = dev->params.tx_carrier_freq;
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allowance = ITE_RXDCR_DEFAULT;
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use_demodulator = false;
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} else {
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low_freq = dev->params.rx_low_carrier_freq;
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high_freq = dev->params.rx_high_carrier_freq;
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if (low_freq == 0) {
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/* don't demodulate */
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freq =
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ITE_DEFAULT_CARRIER_FREQ;
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allowance = ITE_RXDCR_DEFAULT;
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use_demodulator = false;
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} else {
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/* calculate the middle freq */
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freq = (low_freq + high_freq) / 2;
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/* calculate the allowance */
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allowance =
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DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq),
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ITE_RXDCR_PER_10000_STEP
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* (high_freq + low_freq));
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if (allowance < 1)
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allowance = 1;
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if (allowance > ITE_RXDCR_MAX)
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allowance = ITE_RXDCR_MAX;
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use_demodulator = true;
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}
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}
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/* set the carrier parameters in a device-dependent way */
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dev->params.set_carrier_params(dev, ite_is_high_carrier_freq(freq),
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use_demodulator, ite_get_carrier_freq_bits(freq), allowance,
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ite_get_pulse_width_bits(freq, dev->params.tx_duty_cycle));
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}
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/* interrupt service routine for incoming and outgoing CIR data */
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static irqreturn_t ite_cir_isr(int irq, void *data)
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{
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struct ite_dev *dev = data;
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unsigned long flags;
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irqreturn_t ret = IRQ_RETVAL(IRQ_NONE);
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u8 rx_buf[ITE_RX_FIFO_LEN];
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int rx_bytes;
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int iflags;
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ite_dbg_verbose("%s firing", __func__);
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/* grab the spinlock */
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spin_lock_irqsave(&dev->lock, flags);
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/* read the interrupt flags */
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iflags = dev->params.get_irq_causes(dev);
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/* check for the receive interrupt */
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if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) {
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/* read the FIFO bytes */
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rx_bytes =
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dev->params.get_rx_bytes(dev, rx_buf,
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ITE_RX_FIFO_LEN);
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if (rx_bytes > 0) {
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/* drop the spinlock, since the ir-core layer
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* may call us back again through
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* ite_s_idle() */
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spin_unlock_irqrestore(&dev->
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lock,
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flags);
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/* decode the data we've just received */
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ite_decode_bytes(dev, rx_buf,
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rx_bytes);
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/* reacquire the spinlock */
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spin_lock_irqsave(&dev->lock,
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flags);
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/* mark the interrupt as serviced */
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ret = IRQ_RETVAL(IRQ_HANDLED);
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}
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} else if (iflags & ITE_IRQ_TX_FIFO) {
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/* FIFO space available interrupt */
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ite_dbg_verbose("got interrupt for TX FIFO");
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/* wake any sleeping transmitter */
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wake_up_interruptible(&dev->tx_queue);
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/* mark the interrupt as serviced */
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ret = IRQ_RETVAL(IRQ_HANDLED);
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}
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/* drop the spinlock */
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spin_unlock_irqrestore(&dev->lock, flags);
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ite_dbg_verbose("%s done returning %d", __func__, (int)ret);
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return ret;
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}
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/* set the rx carrier freq range, guess it's in Hz... */
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static int ite_set_rx_carrier_range(struct rc_dev *rcdev, u32 carrier_low, u32
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carrier_high)
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{
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unsigned long flags;
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struct ite_dev *dev = rcdev->priv;
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spin_lock_irqsave(&dev->lock, flags);
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dev->params.rx_low_carrier_freq = carrier_low;
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dev->params.rx_high_carrier_freq = carrier_high;
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ite_set_carrier_params(dev);
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spin_unlock_irqrestore(&dev->lock, flags);
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return 0;
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}
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/* set the tx carrier freq, guess it's in Hz... */
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static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier)
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{
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unsigned long flags;
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struct ite_dev *dev = rcdev->priv;
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spin_lock_irqsave(&dev->lock, flags);
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dev->params.tx_carrier_freq = carrier;
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ite_set_carrier_params(dev);
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spin_unlock_irqrestore(&dev->lock, flags);
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return 0;
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}
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/* set the tx duty cycle by controlling the pulse width */
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static int ite_set_tx_duty_cycle(struct rc_dev *rcdev, u32 duty_cycle)
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{
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unsigned long flags;
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struct ite_dev *dev = rcdev->priv;
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spin_lock_irqsave(&dev->lock, flags);
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dev->params.tx_duty_cycle = duty_cycle;
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ite_set_carrier_params(dev);
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spin_unlock_irqrestore(&dev->lock, flags);
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return 0;
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}
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/* transmit out IR pulses; what you get here is a batch of alternating
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* pulse/space/pulse/space lengths that we should write out completely through
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* the FIFO, blocking on a full FIFO */
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static int ite_tx_ir(struct rc_dev *rcdev, unsigned *txbuf, unsigned n)
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{
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unsigned long flags;
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struct ite_dev *dev = rcdev->priv;
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bool is_pulse = false;
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int remaining_us, fifo_avail, fifo_remaining, last_idx = 0;
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int max_rle_us, next_rle_us;
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int ret = n;
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u8 last_sent[ITE_TX_FIFO_LEN];
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u8 val;
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ite_dbg("%s called", __func__);
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/* clear the array just in case */
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memset(last_sent, 0, sizeof(last_sent));
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spin_lock_irqsave(&dev->lock, flags);
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/* let everybody know we're now transmitting */
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dev->transmitting = true;
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/* and set the carrier values for transmission */
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ite_set_carrier_params(dev);
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/* calculate how much time we can send in one byte */
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max_rle_us =
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(ITE_BAUDRATE_DIVISOR * dev->params.sample_period *
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ITE_TX_MAX_RLE) / 1000;
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/* disable the receiver */
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dev->params.disable_rx(dev);
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/* this is where we'll begin filling in the FIFO, until it's full.
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* then we'll just activate the interrupt, wait for it to wake us up
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* again, disable it, continue filling the FIFO... until everything
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* has been pushed out */
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fifo_avail =
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ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
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while (n > 0 && dev->in_use) {
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/* transmit the next sample */
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is_pulse = !is_pulse;
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remaining_us = *(txbuf++);
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n--;
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ite_dbg("%s: %ld",
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((is_pulse) ? "pulse" : "space"),
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(long int)
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remaining_us);
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/* repeat while the pulse is non-zero length */
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while (remaining_us > 0 && dev->in_use) {
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if (remaining_us > max_rle_us)
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next_rle_us = max_rle_us;
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else
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next_rle_us = remaining_us;
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remaining_us -= next_rle_us;
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/* check what's the length we have to pump out */
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val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us;
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/* put it into the sent buffer */
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last_sent[last_idx++] = val;
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last_idx &= (ITE_TX_FIFO_LEN);
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/* encode it for 7 bits */
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val = (val - 1) & ITE_TX_RLE_MASK;
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/* take into account pulse/space prefix */
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if (is_pulse)
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val |= ITE_TX_PULSE;
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else
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val |= ITE_TX_SPACE;
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/*
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* if we get to 0 available, read again, just in case
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* some other slot got freed
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*/
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if (fifo_avail <= 0)
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fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
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/* if it's still full */
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if (fifo_avail <= 0) {
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/* enable the tx interrupt */
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dev->params.
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enable_tx_interrupt(dev);
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/* drop the spinlock */
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spin_unlock_irqrestore(&dev->lock, flags);
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/* wait for the FIFO to empty enough */
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wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8);
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/* get the spinlock again */
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spin_lock_irqsave(&dev->lock, flags);
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/* disable the tx interrupt again. */
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dev->params.
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disable_tx_interrupt(dev);
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}
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/* now send the byte through the FIFO */
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dev->params.put_tx_byte(dev, val);
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fifo_avail--;
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}
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}
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/* wait and don't return until the whole FIFO has been sent out;
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* otherwise we could configure the RX carrier params instead of the
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* TX ones while the transmission is still being performed! */
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fifo_remaining = dev->params.get_tx_used_slots(dev);
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remaining_us = 0;
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while (fifo_remaining > 0) {
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fifo_remaining--;
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last_idx--;
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last_idx &= (ITE_TX_FIFO_LEN - 1);
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remaining_us += last_sent[last_idx];
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}
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remaining_us = (remaining_us * max_rle_us) / (ITE_TX_MAX_RLE);
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/* drop the spinlock while we sleep */
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spin_unlock_irqrestore(&dev->lock, flags);
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/* sleep remaining_us microseconds */
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mdelay(DIV_ROUND_UP(remaining_us, 1000));
|
|
|
|
/* reacquire the spinlock */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
/* now we're not transmitting anymore */
|
|
dev->transmitting = false;
|
|
|
|
/* and set the carrier values for reception */
|
|
ite_set_carrier_params(dev);
|
|
|
|
/* re-enable the receiver */
|
|
if (dev->in_use)
|
|
dev->params.enable_rx(dev);
|
|
|
|
/* notify transmission end */
|
|
wake_up_interruptible(&dev->tx_ended);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* idle the receiver if needed */
|
|
static void ite_s_idle(struct rc_dev *rcdev, bool enable)
|
|
{
|
|
unsigned long flags;
|
|
struct ite_dev *dev = rcdev->priv;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
if (enable) {
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
dev->params.idle_rx(dev);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
}
|
|
}
|
|
|
|
|
|
/* IT8712F HW-specific functions */
|
|
|
|
/* retrieve a bitmask of the current causes for a pending interrupt; this may
|
|
* be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
|
|
* */
|
|
static int it87_get_irq_causes(struct ite_dev *dev)
|
|
{
|
|
u8 iflags;
|
|
int ret = 0;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* read the interrupt flags */
|
|
iflags = inb(dev->cir_addr + IT87_IIR) & IT87_II;
|
|
|
|
switch (iflags) {
|
|
case IT87_II_RXDS:
|
|
ret = ITE_IRQ_RX_FIFO;
|
|
break;
|
|
case IT87_II_RXFO:
|
|
ret = ITE_IRQ_RX_FIFO_OVERRUN;
|
|
break;
|
|
case IT87_II_TXLDL:
|
|
ret = ITE_IRQ_TX_FIFO;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* set the carrier parameters; to be called with the spinlock held */
|
|
static void it87_set_carrier_params(struct ite_dev *dev, bool high_freq,
|
|
bool use_demodulator,
|
|
u8 carrier_freq_bits, u8 allowance_bits,
|
|
u8 pulse_width_bits)
|
|
{
|
|
u8 val;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* program the RCR register */
|
|
val = inb(dev->cir_addr + IT87_RCR)
|
|
& ~(IT87_HCFS | IT87_RXEND | IT87_RXDCR);
|
|
|
|
if (high_freq)
|
|
val |= IT87_HCFS;
|
|
|
|
if (use_demodulator)
|
|
val |= IT87_RXEND;
|
|
|
|
val |= allowance_bits;
|
|
|
|
outb(val, dev->cir_addr + IT87_RCR);
|
|
|
|
/* program the TCR2 register */
|
|
outb((carrier_freq_bits << IT87_CFQ_SHIFT) | pulse_width_bits,
|
|
dev->cir_addr + IT87_TCR2);
|
|
}
|
|
|
|
/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
|
|
* held */
|
|
static int it87_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
|
|
{
|
|
int fifo, read = 0;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* read how many bytes are still in the FIFO */
|
|
fifo = inb(dev->cir_addr + IT87_RSR) & IT87_RXFBC;
|
|
|
|
while (fifo > 0 && buf_size > 0) {
|
|
*(buf++) = inb(dev->cir_addr + IT87_DR);
|
|
fifo--;
|
|
read++;
|
|
buf_size--;
|
|
}
|
|
|
|
return read;
|
|
}
|
|
|
|
/* return how many bytes are still in the FIFO; this will be called
|
|
* with the device spinlock NOT HELD while waiting for the TX FIFO to get
|
|
* empty; let's expect this won't be a problem */
|
|
static int it87_get_tx_used_slots(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
return inb(dev->cir_addr + IT87_TSR) & IT87_TXFBC;
|
|
}
|
|
|
|
/* put a byte to the TX fifo; this should be called with the spinlock held */
|
|
static void it87_put_tx_byte(struct ite_dev *dev, u8 value)
|
|
{
|
|
outb(value, dev->cir_addr + IT87_DR);
|
|
}
|
|
|
|
/* idle the receiver so that we won't receive samples until another
|
|
pulse is detected; this must be called with the device spinlock held */
|
|
static void it87_idle_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable streaming by clearing RXACT writing it as 1 */
|
|
outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXACT,
|
|
dev->cir_addr + IT87_RCR);
|
|
|
|
/* clear the FIFO */
|
|
outb(inb(dev->cir_addr + IT87_TCR1) | IT87_FIFOCLR,
|
|
dev->cir_addr + IT87_TCR1);
|
|
}
|
|
|
|
/* disable the receiver; this must be called with the device spinlock held */
|
|
static void it87_disable_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable the receiver interrupts */
|
|
outb(inb(dev->cir_addr + IT87_IER) & ~(IT87_RDAIE | IT87_RFOIE),
|
|
dev->cir_addr + IT87_IER);
|
|
|
|
/* disable the receiver */
|
|
outb(inb(dev->cir_addr + IT87_RCR) & ~IT87_RXEN,
|
|
dev->cir_addr + IT87_RCR);
|
|
|
|
/* clear the FIFO and RXACT (actually RXACT should have been cleared
|
|
* in the previous outb() call) */
|
|
it87_idle_rx(dev);
|
|
}
|
|
|
|
/* enable the receiver; this must be called with the device spinlock held */
|
|
static void it87_enable_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* enable the receiver by setting RXEN */
|
|
outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXEN,
|
|
dev->cir_addr + IT87_RCR);
|
|
|
|
/* just prepare it to idle for the next reception */
|
|
it87_idle_rx(dev);
|
|
|
|
/* enable the receiver interrupts and master enable flag */
|
|
outb(inb(dev->cir_addr + IT87_IER) | IT87_RDAIE | IT87_RFOIE | IT87_IEC,
|
|
dev->cir_addr + IT87_IER);
|
|
}
|
|
|
|
/* disable the transmitter interrupt; this must be called with the device
|
|
* spinlock held */
|
|
static void it87_disable_tx_interrupt(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable the transmitter interrupts */
|
|
outb(inb(dev->cir_addr + IT87_IER) & ~IT87_TLDLIE,
|
|
dev->cir_addr + IT87_IER);
|
|
}
|
|
|
|
/* enable the transmitter interrupt; this must be called with the device
|
|
* spinlock held */
|
|
static void it87_enable_tx_interrupt(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* enable the transmitter interrupts and master enable flag */
|
|
outb(inb(dev->cir_addr + IT87_IER) | IT87_TLDLIE | IT87_IEC,
|
|
dev->cir_addr + IT87_IER);
|
|
}
|
|
|
|
/* disable the device; this must be called with the device spinlock held */
|
|
static void it87_disable(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* clear out all interrupt enable flags */
|
|
outb(inb(dev->cir_addr + IT87_IER) &
|
|
~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE),
|
|
dev->cir_addr + IT87_IER);
|
|
|
|
/* disable the receiver */
|
|
it87_disable_rx(dev);
|
|
|
|
/* erase the FIFO */
|
|
outb(IT87_FIFOCLR | inb(dev->cir_addr + IT87_TCR1),
|
|
dev->cir_addr + IT87_TCR1);
|
|
}
|
|
|
|
/* initialize the hardware */
|
|
static void it87_init_hardware(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* enable just the baud rate divisor register,
|
|
disabling all the interrupts at the same time */
|
|
outb((inb(dev->cir_addr + IT87_IER) &
|
|
~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE)) | IT87_BR,
|
|
dev->cir_addr + IT87_IER);
|
|
|
|
/* write out the baud rate divisor */
|
|
outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT87_BDLR);
|
|
outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, dev->cir_addr + IT87_BDHR);
|
|
|
|
/* disable the baud rate divisor register again */
|
|
outb(inb(dev->cir_addr + IT87_IER) & ~IT87_BR,
|
|
dev->cir_addr + IT87_IER);
|
|
|
|
/* program the RCR register defaults */
|
|
outb(ITE_RXDCR_DEFAULT, dev->cir_addr + IT87_RCR);
|
|
|
|
/* program the TCR1 register */
|
|
outb(IT87_TXMPM_DEFAULT | IT87_TXENDF | IT87_TXRLE
|
|
| IT87_FIFOTL_DEFAULT | IT87_FIFOCLR,
|
|
dev->cir_addr + IT87_TCR1);
|
|
|
|
/* program the carrier parameters */
|
|
ite_set_carrier_params(dev);
|
|
}
|
|
|
|
/* IT8512F on ITE8708 HW-specific functions */
|
|
|
|
/* retrieve a bitmask of the current causes for a pending interrupt; this may
|
|
* be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
|
|
* */
|
|
static int it8708_get_irq_causes(struct ite_dev *dev)
|
|
{
|
|
u8 iflags;
|
|
int ret = 0;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* read the interrupt flags */
|
|
iflags = inb(dev->cir_addr + IT8708_C0IIR);
|
|
|
|
if (iflags & IT85_TLDLI)
|
|
ret |= ITE_IRQ_TX_FIFO;
|
|
if (iflags & IT85_RDAI)
|
|
ret |= ITE_IRQ_RX_FIFO;
|
|
if (iflags & IT85_RFOI)
|
|
ret |= ITE_IRQ_RX_FIFO_OVERRUN;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* set the carrier parameters; to be called with the spinlock held */
|
|
static void it8708_set_carrier_params(struct ite_dev *dev, bool high_freq,
|
|
bool use_demodulator,
|
|
u8 carrier_freq_bits, u8 allowance_bits,
|
|
u8 pulse_width_bits)
|
|
{
|
|
u8 val;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* program the C0CFR register, with HRAE=1 */
|
|
outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
|
|
dev->cir_addr + IT8708_BANKSEL);
|
|
|
|
val = (inb(dev->cir_addr + IT8708_C0CFR)
|
|
& ~(IT85_HCFS | IT85_CFQ)) | carrier_freq_bits;
|
|
|
|
if (high_freq)
|
|
val |= IT85_HCFS;
|
|
|
|
outb(val, dev->cir_addr + IT8708_C0CFR);
|
|
|
|
outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
|
|
dev->cir_addr + IT8708_BANKSEL);
|
|
|
|
/* program the C0RCR register */
|
|
val = inb(dev->cir_addr + IT8708_C0RCR)
|
|
& ~(IT85_RXEND | IT85_RXDCR);
|
|
|
|
if (use_demodulator)
|
|
val |= IT85_RXEND;
|
|
|
|
val |= allowance_bits;
|
|
|
|
outb(val, dev->cir_addr + IT8708_C0RCR);
|
|
|
|
/* program the C0TCR register */
|
|
val = inb(dev->cir_addr + IT8708_C0TCR) & ~IT85_TXMPW;
|
|
val |= pulse_width_bits;
|
|
outb(val, dev->cir_addr + IT8708_C0TCR);
|
|
}
|
|
|
|
/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
|
|
* held */
|
|
static int it8708_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
|
|
{
|
|
int fifo, read = 0;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* read how many bytes are still in the FIFO */
|
|
fifo = inb(dev->cir_addr + IT8708_C0RFSR) & IT85_RXFBC;
|
|
|
|
while (fifo > 0 && buf_size > 0) {
|
|
*(buf++) = inb(dev->cir_addr + IT8708_C0DR);
|
|
fifo--;
|
|
read++;
|
|
buf_size--;
|
|
}
|
|
|
|
return read;
|
|
}
|
|
|
|
/* return how many bytes are still in the FIFO; this will be called
|
|
* with the device spinlock NOT HELD while waiting for the TX FIFO to get
|
|
* empty; let's expect this won't be a problem */
|
|
static int it8708_get_tx_used_slots(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
return inb(dev->cir_addr + IT8708_C0TFSR) & IT85_TXFBC;
|
|
}
|
|
|
|
/* put a byte to the TX fifo; this should be called with the spinlock held */
|
|
static void it8708_put_tx_byte(struct ite_dev *dev, u8 value)
|
|
{
|
|
outb(value, dev->cir_addr + IT8708_C0DR);
|
|
}
|
|
|
|
/* idle the receiver so that we won't receive samples until another
|
|
pulse is detected; this must be called with the device spinlock held */
|
|
static void it8708_idle_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable streaming by clearing RXACT writing it as 1 */
|
|
outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXACT,
|
|
dev->cir_addr + IT8708_C0RCR);
|
|
|
|
/* clear the FIFO */
|
|
outb(inb(dev->cir_addr + IT8708_C0MSTCR) | IT85_FIFOCLR,
|
|
dev->cir_addr + IT8708_C0MSTCR);
|
|
}
|
|
|
|
/* disable the receiver; this must be called with the device spinlock held */
|
|
static void it8708_disable_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable the receiver interrupts */
|
|
outb(inb(dev->cir_addr + IT8708_C0IER) &
|
|
~(IT85_RDAIE | IT85_RFOIE),
|
|
dev->cir_addr + IT8708_C0IER);
|
|
|
|
/* disable the receiver */
|
|
outb(inb(dev->cir_addr + IT8708_C0RCR) & ~IT85_RXEN,
|
|
dev->cir_addr + IT8708_C0RCR);
|
|
|
|
/* clear the FIFO and RXACT (actually RXACT should have been cleared
|
|
* in the previous outb() call) */
|
|
it8708_idle_rx(dev);
|
|
}
|
|
|
|
/* enable the receiver; this must be called with the device spinlock held */
|
|
static void it8708_enable_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* enable the receiver by setting RXEN */
|
|
outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXEN,
|
|
dev->cir_addr + IT8708_C0RCR);
|
|
|
|
/* just prepare it to idle for the next reception */
|
|
it8708_idle_rx(dev);
|
|
|
|
/* enable the receiver interrupts and master enable flag */
|
|
outb(inb(dev->cir_addr + IT8708_C0IER)
|
|
|IT85_RDAIE | IT85_RFOIE | IT85_IEC,
|
|
dev->cir_addr + IT8708_C0IER);
|
|
}
|
|
|
|
/* disable the transmitter interrupt; this must be called with the device
|
|
* spinlock held */
|
|
static void it8708_disable_tx_interrupt(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable the transmitter interrupts */
|
|
outb(inb(dev->cir_addr + IT8708_C0IER) & ~IT85_TLDLIE,
|
|
dev->cir_addr + IT8708_C0IER);
|
|
}
|
|
|
|
/* enable the transmitter interrupt; this must be called with the device
|
|
* spinlock held */
|
|
static void it8708_enable_tx_interrupt(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* enable the transmitter interrupts and master enable flag */
|
|
outb(inb(dev->cir_addr + IT8708_C0IER)
|
|
|IT85_TLDLIE | IT85_IEC,
|
|
dev->cir_addr + IT8708_C0IER);
|
|
}
|
|
|
|
/* disable the device; this must be called with the device spinlock held */
|
|
static void it8708_disable(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* clear out all interrupt enable flags */
|
|
outb(inb(dev->cir_addr + IT8708_C0IER) &
|
|
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
|
|
dev->cir_addr + IT8708_C0IER);
|
|
|
|
/* disable the receiver */
|
|
it8708_disable_rx(dev);
|
|
|
|
/* erase the FIFO */
|
|
outb(IT85_FIFOCLR | inb(dev->cir_addr + IT8708_C0MSTCR),
|
|
dev->cir_addr + IT8708_C0MSTCR);
|
|
}
|
|
|
|
/* initialize the hardware */
|
|
static void it8708_init_hardware(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable all the interrupts */
|
|
outb(inb(dev->cir_addr + IT8708_C0IER) &
|
|
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
|
|
dev->cir_addr + IT8708_C0IER);
|
|
|
|
/* program the baud rate divisor */
|
|
outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
|
|
dev->cir_addr + IT8708_BANKSEL);
|
|
|
|
outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT8708_C0BDLR);
|
|
outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
|
|
dev->cir_addr + IT8708_C0BDHR);
|
|
|
|
outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
|
|
dev->cir_addr + IT8708_BANKSEL);
|
|
|
|
/* program the C0MSTCR register defaults */
|
|
outb((inb(dev->cir_addr + IT8708_C0MSTCR) &
|
|
~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL |
|
|
IT85_FIFOCLR | IT85_RESET)) |
|
|
IT85_FIFOTL_DEFAULT,
|
|
dev->cir_addr + IT8708_C0MSTCR);
|
|
|
|
/* program the C0RCR register defaults */
|
|
outb((inb(dev->cir_addr + IT8708_C0RCR) &
|
|
~(IT85_RXEN | IT85_RDWOS | IT85_RXEND |
|
|
IT85_RXACT | IT85_RXDCR)) |
|
|
ITE_RXDCR_DEFAULT,
|
|
dev->cir_addr + IT8708_C0RCR);
|
|
|
|
/* program the C0TCR register defaults */
|
|
outb((inb(dev->cir_addr + IT8708_C0TCR) &
|
|
~(IT85_TXMPM | IT85_TXMPW))
|
|
|IT85_TXRLE | IT85_TXENDF |
|
|
IT85_TXMPM_DEFAULT | IT85_TXMPW_DEFAULT,
|
|
dev->cir_addr + IT8708_C0TCR);
|
|
|
|
/* program the carrier parameters */
|
|
ite_set_carrier_params(dev);
|
|
}
|
|
|
|
/* IT8512F on ITE8709 HW-specific functions */
|
|
|
|
/* read a byte from the SRAM module */
|
|
static inline u8 it8709_rm(struct ite_dev *dev, int index)
|
|
{
|
|
outb(index, dev->cir_addr + IT8709_RAM_IDX);
|
|
return inb(dev->cir_addr + IT8709_RAM_VAL);
|
|
}
|
|
|
|
/* write a byte to the SRAM module */
|
|
static inline void it8709_wm(struct ite_dev *dev, u8 val, int index)
|
|
{
|
|
outb(index, dev->cir_addr + IT8709_RAM_IDX);
|
|
outb(val, dev->cir_addr + IT8709_RAM_VAL);
|
|
}
|
|
|
|
static void it8709_wait(struct ite_dev *dev)
|
|
{
|
|
int i = 0;
|
|
/*
|
|
* loop until device tells it's ready to continue
|
|
* iterations count is usually ~750 but can sometimes achieve 13000
|
|
*/
|
|
for (i = 0; i < 15000; i++) {
|
|
udelay(2);
|
|
if (it8709_rm(dev, IT8709_MODE) == IT8709_IDLE)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* read the value of a CIR register */
|
|
static u8 it8709_rr(struct ite_dev *dev, int index)
|
|
{
|
|
/* just wait in case the previous access was a write */
|
|
it8709_wait(dev);
|
|
it8709_wm(dev, index, IT8709_REG_IDX);
|
|
it8709_wm(dev, IT8709_READ, IT8709_MODE);
|
|
|
|
/* wait for the read data to be available */
|
|
it8709_wait(dev);
|
|
|
|
/* return the read value */
|
|
return it8709_rm(dev, IT8709_REG_VAL);
|
|
}
|
|
|
|
/* write the value of a CIR register */
|
|
static void it8709_wr(struct ite_dev *dev, u8 val, int index)
|
|
{
|
|
/* we wait before writing, and not afterwards, since this allows us to
|
|
* pipeline the host CPU with the microcontroller */
|
|
it8709_wait(dev);
|
|
it8709_wm(dev, val, IT8709_REG_VAL);
|
|
it8709_wm(dev, index, IT8709_REG_IDX);
|
|
it8709_wm(dev, IT8709_WRITE, IT8709_MODE);
|
|
}
|
|
|
|
/* retrieve a bitmask of the current causes for a pending interrupt; this may
|
|
* be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
|
|
* */
|
|
static int it8709_get_irq_causes(struct ite_dev *dev)
|
|
{
|
|
u8 iflags;
|
|
int ret = 0;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* read the interrupt flags */
|
|
iflags = it8709_rm(dev, IT8709_IIR);
|
|
|
|
if (iflags & IT85_TLDLI)
|
|
ret |= ITE_IRQ_TX_FIFO;
|
|
if (iflags & IT85_RDAI)
|
|
ret |= ITE_IRQ_RX_FIFO;
|
|
if (iflags & IT85_RFOI)
|
|
ret |= ITE_IRQ_RX_FIFO_OVERRUN;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* set the carrier parameters; to be called with the spinlock held */
|
|
static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq,
|
|
bool use_demodulator,
|
|
u8 carrier_freq_bits, u8 allowance_bits,
|
|
u8 pulse_width_bits)
|
|
{
|
|
u8 val;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
val = (it8709_rr(dev, IT85_C0CFR)
|
|
&~(IT85_HCFS | IT85_CFQ)) |
|
|
carrier_freq_bits;
|
|
|
|
if (high_freq)
|
|
val |= IT85_HCFS;
|
|
|
|
it8709_wr(dev, val, IT85_C0CFR);
|
|
|
|
/* program the C0RCR register */
|
|
val = it8709_rr(dev, IT85_C0RCR)
|
|
& ~(IT85_RXEND | IT85_RXDCR);
|
|
|
|
if (use_demodulator)
|
|
val |= IT85_RXEND;
|
|
|
|
val |= allowance_bits;
|
|
|
|
it8709_wr(dev, val, IT85_C0RCR);
|
|
|
|
/* program the C0TCR register */
|
|
val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW;
|
|
val |= pulse_width_bits;
|
|
it8709_wr(dev, val, IT85_C0TCR);
|
|
}
|
|
|
|
/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
|
|
* held */
|
|
static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
|
|
{
|
|
int fifo, read = 0;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* read how many bytes are still in the FIFO */
|
|
fifo = it8709_rm(dev, IT8709_RFSR) & IT85_RXFBC;
|
|
|
|
while (fifo > 0 && buf_size > 0) {
|
|
*(buf++) = it8709_rm(dev, IT8709_FIFO + read);
|
|
fifo--;
|
|
read++;
|
|
buf_size--;
|
|
}
|
|
|
|
/* 'clear' the FIFO by setting the writing index to 0; this is
|
|
* completely bound to be racy, but we can't help it, since it's a
|
|
* limitation of the protocol */
|
|
it8709_wm(dev, 0, IT8709_RFSR);
|
|
|
|
return read;
|
|
}
|
|
|
|
/* return how many bytes are still in the FIFO; this will be called
|
|
* with the device spinlock NOT HELD while waiting for the TX FIFO to get
|
|
* empty; let's expect this won't be a problem */
|
|
static int it8709_get_tx_used_slots(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC;
|
|
}
|
|
|
|
/* put a byte to the TX fifo; this should be called with the spinlock held */
|
|
static void it8709_put_tx_byte(struct ite_dev *dev, u8 value)
|
|
{
|
|
it8709_wr(dev, value, IT85_C0DR);
|
|
}
|
|
|
|
/* idle the receiver so that we won't receive samples until another
|
|
pulse is detected; this must be called with the device spinlock held */
|
|
static void it8709_idle_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable streaming by clearing RXACT writing it as 1 */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT,
|
|
IT85_C0RCR);
|
|
|
|
/* clear the FIFO */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR,
|
|
IT85_C0MSTCR);
|
|
}
|
|
|
|
/* disable the receiver; this must be called with the device spinlock held */
|
|
static void it8709_disable_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable the receiver interrupts */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
|
|
~(IT85_RDAIE | IT85_RFOIE),
|
|
IT85_C0IER);
|
|
|
|
/* disable the receiver */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN,
|
|
IT85_C0RCR);
|
|
|
|
/* clear the FIFO and RXACT (actually RXACT should have been cleared
|
|
* in the previous it8709_wr(dev, ) call) */
|
|
it8709_idle_rx(dev);
|
|
}
|
|
|
|
/* enable the receiver; this must be called with the device spinlock held */
|
|
static void it8709_enable_rx(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* enable the receiver by setting RXEN */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN,
|
|
IT85_C0RCR);
|
|
|
|
/* just prepare it to idle for the next reception */
|
|
it8709_idle_rx(dev);
|
|
|
|
/* enable the receiver interrupts and master enable flag */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
|
|
|IT85_RDAIE | IT85_RFOIE | IT85_IEC,
|
|
IT85_C0IER);
|
|
}
|
|
|
|
/* disable the transmitter interrupt; this must be called with the device
|
|
* spinlock held */
|
|
static void it8709_disable_tx_interrupt(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable the transmitter interrupts */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE,
|
|
IT85_C0IER);
|
|
}
|
|
|
|
/* enable the transmitter interrupt; this must be called with the device
|
|
* spinlock held */
|
|
static void it8709_enable_tx_interrupt(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* enable the transmitter interrupts and master enable flag */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
|
|
|IT85_TLDLIE | IT85_IEC,
|
|
IT85_C0IER);
|
|
}
|
|
|
|
/* disable the device; this must be called with the device spinlock held */
|
|
static void it8709_disable(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* clear out all interrupt enable flags */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
|
|
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
|
|
IT85_C0IER);
|
|
|
|
/* disable the receiver */
|
|
it8709_disable_rx(dev);
|
|
|
|
/* erase the FIFO */
|
|
it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR),
|
|
IT85_C0MSTCR);
|
|
}
|
|
|
|
/* initialize the hardware */
|
|
static void it8709_init_hardware(struct ite_dev *dev)
|
|
{
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* disable all the interrupts */
|
|
it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
|
|
~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
|
|
IT85_C0IER);
|
|
|
|
/* program the baud rate divisor */
|
|
it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR);
|
|
it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
|
|
IT85_C0BDHR);
|
|
|
|
/* program the C0MSTCR register defaults */
|
|
it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) &
|
|
~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL
|
|
| IT85_FIFOCLR | IT85_RESET)) | IT85_FIFOTL_DEFAULT,
|
|
IT85_C0MSTCR);
|
|
|
|
/* program the C0RCR register defaults */
|
|
it8709_wr(dev, (it8709_rr(dev, IT85_C0RCR) &
|
|
~(IT85_RXEN | IT85_RDWOS | IT85_RXEND | IT85_RXACT
|
|
| IT85_RXDCR)) | ITE_RXDCR_DEFAULT,
|
|
IT85_C0RCR);
|
|
|
|
/* program the C0TCR register defaults */
|
|
it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR) & ~(IT85_TXMPM | IT85_TXMPW))
|
|
| IT85_TXRLE | IT85_TXENDF | IT85_TXMPM_DEFAULT
|
|
| IT85_TXMPW_DEFAULT,
|
|
IT85_C0TCR);
|
|
|
|
/* program the carrier parameters */
|
|
ite_set_carrier_params(dev);
|
|
}
|
|
|
|
|
|
/* generic hardware setup/teardown code */
|
|
|
|
/* activate the device for use */
|
|
static int ite_open(struct rc_dev *rcdev)
|
|
{
|
|
struct ite_dev *dev = rcdev->priv;
|
|
unsigned long flags;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
dev->in_use = true;
|
|
|
|
/* enable the receiver */
|
|
dev->params.enable_rx(dev);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* deactivate the device for use */
|
|
static void ite_close(struct rc_dev *rcdev)
|
|
{
|
|
struct ite_dev *dev = rcdev->priv;
|
|
unsigned long flags;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
dev->in_use = false;
|
|
|
|
/* wait for any transmission to end */
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
wait_event_interruptible(dev->tx_ended, !dev->transmitting);
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
dev->params.disable(dev);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
}
|
|
|
|
/* supported models and their parameters */
|
|
static const struct ite_dev_params ite_dev_descs[] = {
|
|
{ /* 0: ITE8704 */
|
|
.model = "ITE8704 CIR transceiver",
|
|
.io_region_size = IT87_IOREG_LENGTH,
|
|
.io_rsrc_no = 0,
|
|
.hw_tx_capable = true,
|
|
.sample_period = (u32) (1000000000ULL / 115200),
|
|
.tx_carrier_freq = 38000,
|
|
.tx_duty_cycle = 33,
|
|
.rx_low_carrier_freq = 0,
|
|
.rx_high_carrier_freq = 0,
|
|
|
|
/* operations */
|
|
.get_irq_causes = it87_get_irq_causes,
|
|
.enable_rx = it87_enable_rx,
|
|
.idle_rx = it87_idle_rx,
|
|
.disable_rx = it87_idle_rx,
|
|
.get_rx_bytes = it87_get_rx_bytes,
|
|
.enable_tx_interrupt = it87_enable_tx_interrupt,
|
|
.disable_tx_interrupt = it87_disable_tx_interrupt,
|
|
.get_tx_used_slots = it87_get_tx_used_slots,
|
|
.put_tx_byte = it87_put_tx_byte,
|
|
.disable = it87_disable,
|
|
.init_hardware = it87_init_hardware,
|
|
.set_carrier_params = it87_set_carrier_params,
|
|
},
|
|
{ /* 1: ITE8713 */
|
|
.model = "ITE8713 CIR transceiver",
|
|
.io_region_size = IT87_IOREG_LENGTH,
|
|
.io_rsrc_no = 0,
|
|
.hw_tx_capable = true,
|
|
.sample_period = (u32) (1000000000ULL / 115200),
|
|
.tx_carrier_freq = 38000,
|
|
.tx_duty_cycle = 33,
|
|
.rx_low_carrier_freq = 0,
|
|
.rx_high_carrier_freq = 0,
|
|
|
|
/* operations */
|
|
.get_irq_causes = it87_get_irq_causes,
|
|
.enable_rx = it87_enable_rx,
|
|
.idle_rx = it87_idle_rx,
|
|
.disable_rx = it87_idle_rx,
|
|
.get_rx_bytes = it87_get_rx_bytes,
|
|
.enable_tx_interrupt = it87_enable_tx_interrupt,
|
|
.disable_tx_interrupt = it87_disable_tx_interrupt,
|
|
.get_tx_used_slots = it87_get_tx_used_slots,
|
|
.put_tx_byte = it87_put_tx_byte,
|
|
.disable = it87_disable,
|
|
.init_hardware = it87_init_hardware,
|
|
.set_carrier_params = it87_set_carrier_params,
|
|
},
|
|
{ /* 2: ITE8708 */
|
|
.model = "ITE8708 CIR transceiver",
|
|
.io_region_size = IT8708_IOREG_LENGTH,
|
|
.io_rsrc_no = 0,
|
|
.hw_tx_capable = true,
|
|
.sample_period = (u32) (1000000000ULL / 115200),
|
|
.tx_carrier_freq = 38000,
|
|
.tx_duty_cycle = 33,
|
|
.rx_low_carrier_freq = 0,
|
|
.rx_high_carrier_freq = 0,
|
|
|
|
/* operations */
|
|
.get_irq_causes = it8708_get_irq_causes,
|
|
.enable_rx = it8708_enable_rx,
|
|
.idle_rx = it8708_idle_rx,
|
|
.disable_rx = it8708_idle_rx,
|
|
.get_rx_bytes = it8708_get_rx_bytes,
|
|
.enable_tx_interrupt = it8708_enable_tx_interrupt,
|
|
.disable_tx_interrupt =
|
|
it8708_disable_tx_interrupt,
|
|
.get_tx_used_slots = it8708_get_tx_used_slots,
|
|
.put_tx_byte = it8708_put_tx_byte,
|
|
.disable = it8708_disable,
|
|
.init_hardware = it8708_init_hardware,
|
|
.set_carrier_params = it8708_set_carrier_params,
|
|
},
|
|
{ /* 3: ITE8709 */
|
|
.model = "ITE8709 CIR transceiver",
|
|
.io_region_size = IT8709_IOREG_LENGTH,
|
|
.io_rsrc_no = 2,
|
|
.hw_tx_capable = true,
|
|
.sample_period = (u32) (1000000000ULL / 115200),
|
|
.tx_carrier_freq = 38000,
|
|
.tx_duty_cycle = 33,
|
|
.rx_low_carrier_freq = 0,
|
|
.rx_high_carrier_freq = 0,
|
|
|
|
/* operations */
|
|
.get_irq_causes = it8709_get_irq_causes,
|
|
.enable_rx = it8709_enable_rx,
|
|
.idle_rx = it8709_idle_rx,
|
|
.disable_rx = it8709_idle_rx,
|
|
.get_rx_bytes = it8709_get_rx_bytes,
|
|
.enable_tx_interrupt = it8709_enable_tx_interrupt,
|
|
.disable_tx_interrupt =
|
|
it8709_disable_tx_interrupt,
|
|
.get_tx_used_slots = it8709_get_tx_used_slots,
|
|
.put_tx_byte = it8709_put_tx_byte,
|
|
.disable = it8709_disable,
|
|
.init_hardware = it8709_init_hardware,
|
|
.set_carrier_params = it8709_set_carrier_params,
|
|
},
|
|
};
|
|
|
|
static const struct pnp_device_id ite_ids[] = {
|
|
{"ITE8704", 0}, /* Default model */
|
|
{"ITE8713", 1}, /* CIR found in EEEBox 1501U */
|
|
{"ITE8708", 2}, /* Bridged IT8512 */
|
|
{"ITE8709", 3}, /* SRAM-Bridged IT8512 */
|
|
{"", 0},
|
|
};
|
|
|
|
/* allocate memory, probe hardware, and initialize everything */
|
|
static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id
|
|
*dev_id)
|
|
{
|
|
const struct ite_dev_params *dev_desc = NULL;
|
|
struct ite_dev *itdev = NULL;
|
|
struct rc_dev *rdev = NULL;
|
|
int ret = -ENOMEM;
|
|
int model_no;
|
|
int io_rsrc_no;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL);
|
|
if (!itdev)
|
|
return ret;
|
|
|
|
/* input device for IR remote (and tx) */
|
|
rdev = rc_allocate_device(RC_DRIVER_IR_RAW);
|
|
if (!rdev)
|
|
goto exit_free_dev_rdev;
|
|
itdev->rdev = rdev;
|
|
|
|
ret = -ENODEV;
|
|
|
|
/* get the model number */
|
|
model_no = (int)dev_id->driver_data;
|
|
ite_pr(KERN_NOTICE, "Auto-detected model: %s\n",
|
|
ite_dev_descs[model_no].model);
|
|
|
|
if (model_number >= 0 && model_number < ARRAY_SIZE(ite_dev_descs)) {
|
|
model_no = model_number;
|
|
ite_pr(KERN_NOTICE, "The model has been fixed by a module parameter.");
|
|
}
|
|
|
|
ite_pr(KERN_NOTICE, "Using model: %s\n", ite_dev_descs[model_no].model);
|
|
|
|
/* get the description for the device */
|
|
dev_desc = &ite_dev_descs[model_no];
|
|
io_rsrc_no = dev_desc->io_rsrc_no;
|
|
|
|
/* validate pnp resources */
|
|
if (!pnp_port_valid(pdev, io_rsrc_no) ||
|
|
pnp_port_len(pdev, io_rsrc_no) != dev_desc->io_region_size) {
|
|
dev_err(&pdev->dev, "IR PNP Port not valid!\n");
|
|
goto exit_free_dev_rdev;
|
|
}
|
|
|
|
if (!pnp_irq_valid(pdev, 0)) {
|
|
dev_err(&pdev->dev, "PNP IRQ not valid!\n");
|
|
goto exit_free_dev_rdev;
|
|
}
|
|
|
|
/* store resource values */
|
|
itdev->cir_addr = pnp_port_start(pdev, io_rsrc_no);
|
|
itdev->cir_irq = pnp_irq(pdev, 0);
|
|
|
|
/* initialize spinlocks */
|
|
spin_lock_init(&itdev->lock);
|
|
|
|
/* set driver data into the pnp device */
|
|
pnp_set_drvdata(pdev, itdev);
|
|
itdev->pdev = pdev;
|
|
|
|
/* initialize waitqueues for transmission */
|
|
init_waitqueue_head(&itdev->tx_queue);
|
|
init_waitqueue_head(&itdev->tx_ended);
|
|
|
|
/* copy model-specific parameters */
|
|
itdev->params = *dev_desc;
|
|
|
|
/* apply any overrides */
|
|
if (sample_period > 0)
|
|
itdev->params.sample_period = sample_period;
|
|
|
|
if (tx_carrier_freq > 0)
|
|
itdev->params.tx_carrier_freq = tx_carrier_freq;
|
|
|
|
if (tx_duty_cycle > 0 && tx_duty_cycle <= 100)
|
|
itdev->params.tx_duty_cycle = tx_duty_cycle;
|
|
|
|
if (rx_low_carrier_freq > 0)
|
|
itdev->params.rx_low_carrier_freq = rx_low_carrier_freq;
|
|
|
|
if (rx_high_carrier_freq > 0)
|
|
itdev->params.rx_high_carrier_freq = rx_high_carrier_freq;
|
|
|
|
/* print out parameters */
|
|
ite_pr(KERN_NOTICE, "TX-capable: %d\n", (int)
|
|
itdev->params.hw_tx_capable);
|
|
ite_pr(KERN_NOTICE, "Sample period (ns): %ld\n", (long)
|
|
itdev->params.sample_period);
|
|
ite_pr(KERN_NOTICE, "TX carrier frequency (Hz): %d\n", (int)
|
|
itdev->params.tx_carrier_freq);
|
|
ite_pr(KERN_NOTICE, "TX duty cycle (%%): %d\n", (int)
|
|
itdev->params.tx_duty_cycle);
|
|
ite_pr(KERN_NOTICE, "RX low carrier frequency (Hz): %d\n", (int)
|
|
itdev->params.rx_low_carrier_freq);
|
|
ite_pr(KERN_NOTICE, "RX high carrier frequency (Hz): %d\n", (int)
|
|
itdev->params.rx_high_carrier_freq);
|
|
|
|
/* set up hardware initial state */
|
|
itdev->params.init_hardware(itdev);
|
|
|
|
/* set up ir-core props */
|
|
rdev->priv = itdev;
|
|
rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
|
|
rdev->open = ite_open;
|
|
rdev->close = ite_close;
|
|
rdev->s_idle = ite_s_idle;
|
|
rdev->s_rx_carrier_range = ite_set_rx_carrier_range;
|
|
/* FIFO threshold is 17 bytes, so 17 * 8 samples minimum */
|
|
rdev->min_timeout = 17 * 8 * ITE_BAUDRATE_DIVISOR *
|
|
itdev->params.sample_period;
|
|
rdev->timeout = IR_DEFAULT_TIMEOUT;
|
|
rdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
|
|
rdev->rx_resolution = ITE_BAUDRATE_DIVISOR *
|
|
itdev->params.sample_period;
|
|
rdev->tx_resolution = ITE_BAUDRATE_DIVISOR *
|
|
itdev->params.sample_period;
|
|
|
|
/* set up transmitter related values if needed */
|
|
if (itdev->params.hw_tx_capable) {
|
|
rdev->tx_ir = ite_tx_ir;
|
|
rdev->s_tx_carrier = ite_set_tx_carrier;
|
|
rdev->s_tx_duty_cycle = ite_set_tx_duty_cycle;
|
|
}
|
|
|
|
rdev->device_name = dev_desc->model;
|
|
rdev->input_id.bustype = BUS_HOST;
|
|
rdev->input_id.vendor = PCI_VENDOR_ID_ITE;
|
|
rdev->input_id.product = 0;
|
|
rdev->input_id.version = 0;
|
|
rdev->driver_name = ITE_DRIVER_NAME;
|
|
rdev->map_name = RC_MAP_RC6_MCE;
|
|
|
|
ret = rc_register_device(rdev);
|
|
if (ret)
|
|
goto exit_free_dev_rdev;
|
|
|
|
ret = -EBUSY;
|
|
/* now claim resources */
|
|
if (!request_region(itdev->cir_addr,
|
|
dev_desc->io_region_size, ITE_DRIVER_NAME))
|
|
goto exit_unregister_device;
|
|
|
|
if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED,
|
|
ITE_DRIVER_NAME, (void *)itdev))
|
|
goto exit_release_cir_addr;
|
|
|
|
ite_pr(KERN_NOTICE, "driver has been successfully loaded\n");
|
|
|
|
return 0;
|
|
|
|
exit_release_cir_addr:
|
|
release_region(itdev->cir_addr, itdev->params.io_region_size);
|
|
exit_unregister_device:
|
|
rc_unregister_device(rdev);
|
|
rdev = NULL;
|
|
exit_free_dev_rdev:
|
|
rc_free_device(rdev);
|
|
kfree(itdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void ite_remove(struct pnp_dev *pdev)
|
|
{
|
|
struct ite_dev *dev = pnp_get_drvdata(pdev);
|
|
unsigned long flags;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
/* disable hardware */
|
|
dev->params.disable(dev);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
/* free resources */
|
|
free_irq(dev->cir_irq, dev);
|
|
release_region(dev->cir_addr, dev->params.io_region_size);
|
|
|
|
rc_unregister_device(dev->rdev);
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
static int ite_suspend(struct pnp_dev *pdev, pm_message_t state)
|
|
{
|
|
struct ite_dev *dev = pnp_get_drvdata(pdev);
|
|
unsigned long flags;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
/* wait for any transmission to end */
|
|
wait_event_interruptible(dev->tx_ended, !dev->transmitting);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
/* disable all interrupts */
|
|
dev->params.disable(dev);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ite_resume(struct pnp_dev *pdev)
|
|
{
|
|
struct ite_dev *dev = pnp_get_drvdata(pdev);
|
|
unsigned long flags;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
/* reinitialize hardware config registers */
|
|
dev->params.init_hardware(dev);
|
|
/* enable the receiver */
|
|
dev->params.enable_rx(dev);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ite_shutdown(struct pnp_dev *pdev)
|
|
{
|
|
struct ite_dev *dev = pnp_get_drvdata(pdev);
|
|
unsigned long flags;
|
|
|
|
ite_dbg("%s called", __func__);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
/* disable all interrupts */
|
|
dev->params.disable(dev);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
}
|
|
|
|
static struct pnp_driver ite_driver = {
|
|
.name = ITE_DRIVER_NAME,
|
|
.id_table = ite_ids,
|
|
.probe = ite_probe,
|
|
.remove = ite_remove,
|
|
.suspend = ite_suspend,
|
|
.resume = ite_resume,
|
|
.shutdown = ite_shutdown,
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pnp, ite_ids);
|
|
MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
|
|
|
|
MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_pnp_driver(ite_driver);
|