![Greg Kroah-Hartman](/assets/img/avatar_default.png)
This is based on Linux 3.7 rc6 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJQra3OAAoJEBOhurvWBoCKtT8P/2oQ/lB5S7Snh5LkoB7OUvmT pczaGGjX9ZWkrTUanuRaB2Ye3I/ctAZ7Nhg0YLPJLUZWR9AjqhzuF06LIcr26W7N DkVtqiURbV64b4QMYXssLS7B6YfgC7iEEwF/yf35j3HlerDG33veth98nnhHeLA5 tLUMTtGdpMelZP2D0533Hihyu5ndl1gH1l6Qhy8Aqel2WJMqx1oZgexIRNpwUjuH hN1WkQH3hvrsVwDENX25nVMx3PvgngPb0006dZDtBkuHI/z0TvW7iyIOc5db/FfG TBZHcSciDjSTkYURu1mn60fmXdrAXWHpGCVx1ikiWQ8xQiXj3ctaxUDWJP9ZbxNb T4KPk5DxGg0f0OctjORRV+Q6KV0YH9d+Gig6O9AHOC8VK8LQQaGv3Mgq0PBGHW+D 6XmtIud142VHgHqHlGMB6MLl2dno3s2mtu0Ckb79s8nMMEhzRCgY/aBc5AW3wFvz eGEK+X82BrSEAc4w2NiwhpqUti7W4KgQiw1S9UivEFGzqUcXX90aXFpz6SghEThd h5h0apoAurWorwETF8Smh2Gtp0ZBuDEgX7acWeICbnp+/Pn00rC5LNUhgd0WDHJS kkVq8LXW1W+VvcMZqlBRmC2x+UC0zWqnzevbyYFnXB5xxwk12ud6K1DVHUO7CWrv 0izBUP5SwLSSCp+SAe+t =/KTt -----END PGP SIGNATURE----- Merge tag 'pull_req_20121122' of git://git.kernel.org/pub/scm/linux/kernel/git/mzx/extcon into char-misc-next MyungJoo writes: "extcon pull request targetting Linux 3.8 for Greg KH on 2012.11.22 This is based on Linux 3.7 rc6"
557 lines
14 KiB
C
557 lines
14 KiB
C
/*
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* extcon-arizona.c - Extcon driver Wolfson Arizona devices
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*
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* Copyright (C) 2012 Wolfson Microelectronics plc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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/i2c.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/input.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include <linux/extcon.h>
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#include <linux/mfd/arizona/core.h>
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#include <linux/mfd/arizona/pdata.h>
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#include <linux/mfd/arizona/registers.h>
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#define ARIZONA_NUM_BUTTONS 6
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struct arizona_extcon_info {
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struct device *dev;
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struct arizona *arizona;
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struct mutex lock;
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struct regulator *micvdd;
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struct input_dev *input;
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int micd_mode;
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const struct arizona_micd_config *micd_modes;
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int micd_num_modes;
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bool micd_reva;
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bool mic;
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bool detecting;
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int jack_flips;
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struct extcon_dev edev;
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};
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static const struct arizona_micd_config micd_default_modes[] = {
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{ ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
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{ 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
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};
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static struct {
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u16 status;
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int report;
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} arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = {
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{ 0x1, BTN_0 },
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{ 0x2, BTN_1 },
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{ 0x4, BTN_2 },
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{ 0x8, BTN_3 },
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{ 0x10, BTN_4 },
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{ 0x20, BTN_5 },
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};
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#define ARIZONA_CABLE_MECHANICAL 0
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#define ARIZONA_CABLE_MICROPHONE 1
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#define ARIZONA_CABLE_HEADPHONE 2
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static const char *arizona_cable[] = {
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"Mechanical",
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"Microphone",
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"Headphone",
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NULL,
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};
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static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
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{
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struct arizona *arizona = info->arizona;
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gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
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info->micd_modes[mode].gpio);
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regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
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ARIZONA_MICD_BIAS_SRC_MASK,
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info->micd_modes[mode].bias);
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regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
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ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
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info->micd_mode = mode;
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dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
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}
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static void arizona_start_mic(struct arizona_extcon_info *info)
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{
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struct arizona *arizona = info->arizona;
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bool change;
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int ret;
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info->detecting = true;
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info->mic = false;
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info->jack_flips = 0;
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/* Microphone detection can't use idle mode */
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pm_runtime_get(info->dev);
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ret = regulator_enable(info->micvdd);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
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ret);
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}
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if (info->micd_reva) {
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regmap_write(arizona->regmap, 0x80, 0x3);
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regmap_write(arizona->regmap, 0x294, 0);
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regmap_write(arizona->regmap, 0x80, 0x0);
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}
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regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
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ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
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&change);
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if (!change) {
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regulator_disable(info->micvdd);
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pm_runtime_put_autosuspend(info->dev);
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}
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}
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static void arizona_stop_mic(struct arizona_extcon_info *info)
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{
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struct arizona *arizona = info->arizona;
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bool change;
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regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
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ARIZONA_MICD_ENA, 0,
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&change);
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if (info->micd_reva) {
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regmap_write(arizona->regmap, 0x80, 0x3);
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regmap_write(arizona->regmap, 0x294, 2);
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regmap_write(arizona->regmap, 0x80, 0x0);
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}
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if (change) {
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regulator_disable(info->micvdd);
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pm_runtime_mark_last_busy(info->dev);
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pm_runtime_put_autosuspend(info->dev);
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}
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}
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static irqreturn_t arizona_micdet(int irq, void *data)
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{
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struct arizona_extcon_info *info = data;
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struct arizona *arizona = info->arizona;
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unsigned int val, lvl;
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int ret, i;
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mutex_lock(&info->lock);
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ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
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mutex_unlock(&info->lock);
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return IRQ_NONE;
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}
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dev_dbg(arizona->dev, "MICDET: %x\n", val);
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if (!(val & ARIZONA_MICD_VALID)) {
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dev_warn(arizona->dev, "Microphone detection state invalid\n");
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mutex_unlock(&info->lock);
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return IRQ_NONE;
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}
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/* Due to jack detect this should never happen */
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if (!(val & ARIZONA_MICD_STS)) {
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dev_warn(arizona->dev, "Detected open circuit\n");
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info->detecting = false;
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goto handled;
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}
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/* If we got a high impedence we should have a headset, report it. */
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if (info->detecting && (val & 0x400)) {
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ret = extcon_update_state(&info->edev,
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1 << ARIZONA_CABLE_MICROPHONE |
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1 << ARIZONA_CABLE_HEADPHONE,
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1 << ARIZONA_CABLE_MICROPHONE |
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1 << ARIZONA_CABLE_HEADPHONE);
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if (ret != 0)
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dev_err(arizona->dev, "Headset report failed: %d\n",
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ret);
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info->mic = true;
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info->detecting = false;
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goto handled;
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}
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/* If we detected a lower impedence during initial startup
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* then we probably have the wrong polarity, flip it. Don't
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* do this for the lowest impedences to speed up detection of
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* plain headphones. If both polarities report a low
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* impedence then give up and report headphones.
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*/
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if (info->detecting && (val & 0x3f8)) {
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info->jack_flips++;
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if (info->jack_flips >= info->micd_num_modes) {
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dev_dbg(arizona->dev, "Detected headphone\n");
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info->detecting = false;
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arizona_stop_mic(info);
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ret = extcon_set_cable_state_(&info->edev,
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ARIZONA_CABLE_HEADPHONE,
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true);
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if (ret != 0)
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dev_err(arizona->dev,
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"Headphone report failed: %d\n",
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ret);
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} else {
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info->micd_mode++;
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if (info->micd_mode == info->micd_num_modes)
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info->micd_mode = 0;
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arizona_extcon_set_mode(info, info->micd_mode);
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info->jack_flips++;
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}
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goto handled;
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}
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/*
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* If we're still detecting and we detect a short then we've
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* got a headphone. Otherwise it's a button press.
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*/
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if (val & 0x3fc) {
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if (info->mic) {
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dev_dbg(arizona->dev, "Mic button detected\n");
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lvl = val & ARIZONA_MICD_LVL_MASK;
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lvl >>= ARIZONA_MICD_LVL_SHIFT;
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for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
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if (lvl & arizona_lvl_to_key[i].status)
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input_report_key(info->input,
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arizona_lvl_to_key[i].report,
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1);
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input_sync(info->input);
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} else if (info->detecting) {
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dev_dbg(arizona->dev, "Headphone detected\n");
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info->detecting = false;
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arizona_stop_mic(info);
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ret = extcon_set_cable_state_(&info->edev,
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ARIZONA_CABLE_HEADPHONE,
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true);
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if (ret != 0)
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dev_err(arizona->dev,
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"Headphone report failed: %d\n",
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ret);
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} else {
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dev_warn(arizona->dev, "Button with no mic: %x\n",
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val);
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}
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} else {
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dev_dbg(arizona->dev, "Mic button released\n");
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for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
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input_report_key(info->input,
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arizona_lvl_to_key[i].report, 0);
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input_sync(info->input);
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}
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handled:
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pm_runtime_mark_last_busy(info->dev);
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mutex_unlock(&info->lock);
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return IRQ_HANDLED;
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}
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static irqreturn_t arizona_jackdet(int irq, void *data)
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{
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struct arizona_extcon_info *info = data;
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struct arizona *arizona = info->arizona;
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unsigned int val;
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int ret, i;
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pm_runtime_get_sync(info->dev);
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mutex_lock(&info->lock);
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ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
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ret);
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mutex_unlock(&info->lock);
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pm_runtime_put_autosuspend(info->dev);
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return IRQ_NONE;
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}
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if (val & ARIZONA_JD1_STS) {
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dev_dbg(arizona->dev, "Detected jack\n");
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ret = extcon_set_cable_state_(&info->edev,
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ARIZONA_CABLE_MECHANICAL, true);
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if (ret != 0)
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dev_err(arizona->dev, "Mechanical report failed: %d\n",
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ret);
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arizona_start_mic(info);
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} else {
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dev_dbg(arizona->dev, "Detected jack removal\n");
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arizona_stop_mic(info);
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for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
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input_report_key(info->input,
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arizona_lvl_to_key[i].report, 0);
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input_sync(info->input);
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ret = extcon_update_state(&info->edev, 0xffffffff, 0);
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if (ret != 0)
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dev_err(arizona->dev, "Removal report failed: %d\n",
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ret);
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}
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mutex_unlock(&info->lock);
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pm_runtime_mark_last_busy(info->dev);
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pm_runtime_put_autosuspend(info->dev);
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return IRQ_HANDLED;
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}
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static int arizona_extcon_probe(struct platform_device *pdev)
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{
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struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
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struct arizona_pdata *pdata;
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struct arizona_extcon_info *info;
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int ret, mode, i;
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pdata = dev_get_platdata(arizona->dev);
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info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
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if (!info) {
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dev_err(&pdev->dev, "Failed to allocate memory\n");
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ret = -ENOMEM;
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goto err;
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}
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info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
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if (IS_ERR(info->micvdd)) {
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ret = PTR_ERR(info->micvdd);
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dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
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goto err;
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}
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mutex_init(&info->lock);
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info->arizona = arizona;
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info->dev = &pdev->dev;
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info->detecting = true;
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platform_set_drvdata(pdev, info);
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switch (arizona->type) {
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case WM5102:
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switch (arizona->rev) {
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case 0:
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info->micd_reva = true;
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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info->edev.name = "Headset Jack";
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info->edev.supported_cable = arizona_cable;
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ret = extcon_dev_register(&info->edev, arizona->dev);
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if (ret < 0) {
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dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
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ret);
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goto err;
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}
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if (pdata->num_micd_configs) {
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info->micd_modes = pdata->micd_configs;
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info->micd_num_modes = pdata->num_micd_configs;
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} else {
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info->micd_modes = micd_default_modes;
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info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
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}
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if (arizona->pdata.micd_pol_gpio > 0) {
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if (info->micd_modes[0].gpio)
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mode = GPIOF_OUT_INIT_HIGH;
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else
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mode = GPIOF_OUT_INIT_LOW;
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ret = devm_gpio_request_one(&pdev->dev,
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arizona->pdata.micd_pol_gpio,
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mode,
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"MICD polarity");
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
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arizona->pdata.micd_pol_gpio, ret);
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goto err_register;
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}
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}
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arizona_extcon_set_mode(info, 0);
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info->input = input_allocate_device();
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if (!info->input) {
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dev_err(arizona->dev, "Can't allocate input dev\n");
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ret = -ENOMEM;
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goto err_register;
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}
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for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
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input_set_capability(info->input, EV_KEY,
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arizona_lvl_to_key[i].report);
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info->input->name = "Headset";
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info->input->phys = "arizona/extcon";
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info->input->dev.parent = &pdev->dev;
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pm_runtime_enable(&pdev->dev);
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pm_runtime_idle(&pdev->dev);
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pm_runtime_get_sync(&pdev->dev);
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ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
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"JACKDET rise", arizona_jackdet, info);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
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ret);
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goto err_input;
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}
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ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
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ret);
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goto err_rise;
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}
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ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
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"JACKDET fall", arizona_jackdet, info);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
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goto err_rise_wake;
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}
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ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
|
|
ret);
|
|
goto err_fall;
|
|
}
|
|
|
|
ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
|
|
"MICDET", arizona_micdet, info);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
|
|
goto err_fall_wake;
|
|
}
|
|
|
|
regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
|
|
ARIZONA_MICD_BIAS_STARTTIME_MASK |
|
|
ARIZONA_MICD_RATE_MASK,
|
|
7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT |
|
|
8 << ARIZONA_MICD_RATE_SHIFT);
|
|
|
|
arizona_clk32k_enable(arizona);
|
|
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
|
|
ARIZONA_JD1_DB, ARIZONA_JD1_DB);
|
|
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
|
|
ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
|
|
|
|
ret = regulator_allow_bypass(info->micvdd, true);
|
|
if (ret != 0)
|
|
dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n",
|
|
ret);
|
|
|
|
pm_runtime_put(&pdev->dev);
|
|
|
|
ret = input_register_device(info->input);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
|
|
goto err_micdet;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_micdet:
|
|
arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
|
|
err_fall_wake:
|
|
arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
|
|
err_fall:
|
|
arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
|
|
err_rise_wake:
|
|
arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
|
|
err_rise:
|
|
arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
|
|
err_input:
|
|
input_free_device(info->input);
|
|
err_register:
|
|
pm_runtime_disable(&pdev->dev);
|
|
extcon_dev_unregister(&info->edev);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int arizona_extcon_remove(struct platform_device *pdev)
|
|
{
|
|
struct arizona_extcon_info *info = platform_get_drvdata(pdev);
|
|
struct arizona *arizona = info->arizona;
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
|
|
arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
|
|
arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
|
|
arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
|
|
arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
|
|
regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
|
|
ARIZONA_JD1_ENA, 0);
|
|
arizona_clk32k_disable(arizona);
|
|
input_unregister_device(info->input);
|
|
extcon_dev_unregister(&info->edev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver arizona_extcon_driver = {
|
|
.driver = {
|
|
.name = "arizona-extcon",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = arizona_extcon_probe,
|
|
.remove = arizona_extcon_remove,
|
|
};
|
|
|
|
module_platform_driver(arizona_extcon_driver);
|
|
|
|
MODULE_DESCRIPTION("Arizona Extcon driver");
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:extcon-arizona");
|