/* * extcon-arizona.c - Extcon driver Wolfson Arizona devices * * Copyright (C) 2012 Wolfson Microelectronics plc * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define ARIZONA_NUM_BUTTONS 6 struct arizona_extcon_info { struct device *dev; struct arizona *arizona; struct mutex lock; struct regulator *micvdd; struct input_dev *input; int micd_mode; const struct arizona_micd_config *micd_modes; int micd_num_modes; bool micd_reva; bool mic; bool detecting; int jack_flips; struct extcon_dev edev; }; static const struct arizona_micd_config micd_default_modes[] = { { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 }, { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 }, }; static struct { u16 status; int report; } arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = { { 0x1, BTN_0 }, { 0x2, BTN_1 }, { 0x4, BTN_2 }, { 0x8, BTN_3 }, { 0x10, BTN_4 }, { 0x20, BTN_5 }, }; #define ARIZONA_CABLE_MECHANICAL 0 #define ARIZONA_CABLE_MICROPHONE 1 #define ARIZONA_CABLE_HEADPHONE 2 static const char *arizona_cable[] = { "Mechanical", "Microphone", "Headphone", NULL, }; static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode) { struct arizona *arizona = info->arizona; gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio, info->micd_modes[mode].gpio); regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1, ARIZONA_MICD_BIAS_SRC_MASK, info->micd_modes[mode].bias); regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1, ARIZONA_ACCDET_SRC, info->micd_modes[mode].src); info->micd_mode = mode; dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode); } static void arizona_start_mic(struct arizona_extcon_info *info) { struct arizona *arizona = info->arizona; bool change; int ret; info->detecting = true; info->mic = false; info->jack_flips = 0; /* Microphone detection can't use idle mode */ pm_runtime_get(info->dev); ret = regulator_enable(info->micvdd); if (ret != 0) { dev_err(arizona->dev, "Failed to enable MICVDD: %d\n", ret); } if (info->micd_reva) { regmap_write(arizona->regmap, 0x80, 0x3); regmap_write(arizona->regmap, 0x294, 0); regmap_write(arizona->regmap, 0x80, 0x0); } regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1, ARIZONA_MICD_ENA, ARIZONA_MICD_ENA, &change); if (!change) { regulator_disable(info->micvdd); pm_runtime_put_autosuspend(info->dev); } } static void arizona_stop_mic(struct arizona_extcon_info *info) { struct arizona *arizona = info->arizona; bool change; regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1, ARIZONA_MICD_ENA, 0, &change); if (info->micd_reva) { regmap_write(arizona->regmap, 0x80, 0x3); regmap_write(arizona->regmap, 0x294, 2); regmap_write(arizona->regmap, 0x80, 0x0); } if (change) { regulator_disable(info->micvdd); pm_runtime_mark_last_busy(info->dev); pm_runtime_put_autosuspend(info->dev); } } static irqreturn_t arizona_micdet(int irq, void *data) { struct arizona_extcon_info *info = data; struct arizona *arizona = info->arizona; unsigned int val, lvl; int ret, i; mutex_lock(&info->lock); ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val); if (ret != 0) { dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret); return IRQ_NONE; } dev_dbg(arizona->dev, "MICDET: %x\n", val); if (!(val & ARIZONA_MICD_VALID)) { dev_warn(arizona->dev, "Microphone detection state invalid\n"); mutex_unlock(&info->lock); return IRQ_NONE; } /* Due to jack detect this should never happen */ if (!(val & ARIZONA_MICD_STS)) { dev_warn(arizona->dev, "Detected open circuit\n"); info->detecting = false; goto handled; } /* If we got a high impedence we should have a headset, report it. */ if (info->detecting && (val & 0x400)) { ret = extcon_update_state(&info->edev, 1 << ARIZONA_CABLE_MICROPHONE | 1 << ARIZONA_CABLE_HEADPHONE, 1 << ARIZONA_CABLE_MICROPHONE | 1 << ARIZONA_CABLE_HEADPHONE); if (ret != 0) dev_err(arizona->dev, "Headset report failed: %d\n", ret); info->mic = true; info->detecting = false; goto handled; } /* If we detected a lower impedence during initial startup * then we probably have the wrong polarity, flip it. Don't * do this for the lowest impedences to speed up detection of * plain headphones. If both polarities report a low * impedence then give up and report headphones. */ if (info->detecting && (val & 0x3f8)) { info->jack_flips++; if (info->jack_flips >= info->micd_num_modes) { dev_dbg(arizona->dev, "Detected headphone\n"); info->detecting = false; arizona_stop_mic(info); ret = extcon_set_cable_state_(&info->edev, ARIZONA_CABLE_HEADPHONE, true); if (ret != 0) dev_err(arizona->dev, "Headphone report failed: %d\n", ret); } else { info->micd_mode++; if (info->micd_mode == info->micd_num_modes) info->micd_mode = 0; arizona_extcon_set_mode(info, info->micd_mode); info->jack_flips++; } goto handled; } /* * If we're still detecting and we detect a short then we've * got a headphone. Otherwise it's a button press. */ if (val & 0x3fc) { if (info->mic) { dev_dbg(arizona->dev, "Mic button detected\n"); lvl = val & ARIZONA_MICD_LVL_MASK; lvl >>= ARIZONA_MICD_LVL_SHIFT; for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) if (lvl & arizona_lvl_to_key[i].status) input_report_key(info->input, arizona_lvl_to_key[i].report, 1); input_sync(info->input); } else if (info->detecting) { dev_dbg(arizona->dev, "Headphone detected\n"); info->detecting = false; arizona_stop_mic(info); ret = extcon_set_cable_state_(&info->edev, ARIZONA_CABLE_HEADPHONE, true); if (ret != 0) dev_err(arizona->dev, "Headphone report failed: %d\n", ret); } else { dev_warn(arizona->dev, "Button with no mic: %x\n", val); } } else { dev_dbg(arizona->dev, "Mic button released\n"); for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) input_report_key(info->input, arizona_lvl_to_key[i].report, 0); input_sync(info->input); } handled: pm_runtime_mark_last_busy(info->dev); mutex_unlock(&info->lock); return IRQ_HANDLED; } static irqreturn_t arizona_jackdet(int irq, void *data) { struct arizona_extcon_info *info = data; struct arizona *arizona = info->arizona; unsigned int val; int ret, i; pm_runtime_get_sync(info->dev); mutex_lock(&info->lock); ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val); if (ret != 0) { dev_err(arizona->dev, "Failed to read jackdet status: %d\n", ret); mutex_unlock(&info->lock); pm_runtime_put_autosuspend(info->dev); return IRQ_NONE; } if (val & ARIZONA_JD1_STS) { dev_dbg(arizona->dev, "Detected jack\n"); ret = extcon_set_cable_state_(&info->edev, ARIZONA_CABLE_MECHANICAL, true); if (ret != 0) dev_err(arizona->dev, "Mechanical report failed: %d\n", ret); arizona_start_mic(info); } else { dev_dbg(arizona->dev, "Detected jack removal\n"); arizona_stop_mic(info); for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) input_report_key(info->input, arizona_lvl_to_key[i].report, 0); input_sync(info->input); ret = extcon_update_state(&info->edev, 0xffffffff, 0); if (ret != 0) dev_err(arizona->dev, "Removal report failed: %d\n", ret); } mutex_unlock(&info->lock); pm_runtime_mark_last_busy(info->dev); pm_runtime_put_autosuspend(info->dev); return IRQ_HANDLED; } static int __devinit arizona_extcon_probe(struct platform_device *pdev) { struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); struct arizona_pdata *pdata; struct arizona_extcon_info *info; int ret, mode, i; pdata = dev_get_platdata(arizona->dev); info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) { dev_err(&pdev->dev, "Failed to allocate memory\n"); ret = -ENOMEM; goto err; } info->micvdd = devm_regulator_get(arizona->dev, "MICVDD"); if (IS_ERR(info->micvdd)) { ret = PTR_ERR(info->micvdd); dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret); goto err; } mutex_init(&info->lock); info->arizona = arizona; info->dev = &pdev->dev; info->detecting = true; platform_set_drvdata(pdev, info); switch (arizona->type) { case WM5102: switch (arizona->rev) { case 0: info->micd_reva = true; break; default: break; } break; default: break; } info->edev.name = "Headset Jack"; info->edev.supported_cable = arizona_cable; ret = extcon_dev_register(&info->edev, arizona->dev); if (ret < 0) { dev_err(arizona->dev, "extcon_dev_register() failed: %d\n", ret); goto err; } if (pdata->num_micd_configs) { info->micd_modes = pdata->micd_configs; info->micd_num_modes = pdata->num_micd_configs; } else { info->micd_modes = micd_default_modes; info->micd_num_modes = ARRAY_SIZE(micd_default_modes); } if (arizona->pdata.micd_pol_gpio > 0) { if (info->micd_modes[0].gpio) mode = GPIOF_OUT_INIT_HIGH; else mode = GPIOF_OUT_INIT_LOW; ret = devm_gpio_request_one(&pdev->dev, arizona->pdata.micd_pol_gpio, mode, "MICD polarity"); if (ret != 0) { dev_err(arizona->dev, "Failed to request GPIO%d: %d\n", arizona->pdata.micd_pol_gpio, ret); goto err_register; } } arizona_extcon_set_mode(info, 0); info->input = input_allocate_device(); if (!info->input) { dev_err(arizona->dev, "Can't allocate input dev\n"); ret = -ENOMEM; goto err_register; } for (i = 0; i < ARIZONA_NUM_BUTTONS; i++) input_set_capability(info->input, EV_KEY, arizona_lvl_to_key[i].report); info->input->name = "Headset"; info->input->phys = "arizona/extcon"; info->input->dev.parent = &pdev->dev; pm_runtime_enable(&pdev->dev); pm_runtime_idle(&pdev->dev); pm_runtime_get_sync(&pdev->dev); ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE, "JACKDET rise", arizona_jackdet, info); if (ret != 0) { dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n", ret); goto err_input; } ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1); if (ret != 0) { dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n", ret); goto err_rise; } ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL, "JACKDET fall", arizona_jackdet, info); if (ret != 0) { dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret); goto err_rise_wake; } 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 __devexit 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 = __devexit_p(arizona_extcon_remove), }; module_platform_driver(arizona_extcon_driver); MODULE_DESCRIPTION("Arizona Extcon driver"); MODULE_AUTHOR("Mark Brown "); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:extcon-arizona");