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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"
538 lines
13 KiB
C
538 lines
13 KiB
C
/*
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* extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
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*
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* Copyright (C) 2012 Samsung Electronics
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* Donggeun Kim <dg77.kim@samsung.com>
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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/platform_device.h>
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#include <linux/kobject.h>
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#include <linux/mfd/max8997.h>
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#include <linux/mfd/max8997-private.h>
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#include <linux/extcon.h>
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#include <linux/irqdomain.h>
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#define DEV_NAME "max8997-muic"
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/* MAX8997-MUIC STATUS1 register */
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#define STATUS1_ADC_SHIFT 0
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#define STATUS1_ADCLOW_SHIFT 5
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#define STATUS1_ADCERR_SHIFT 6
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#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
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#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
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#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
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/* MAX8997-MUIC STATUS2 register */
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#define STATUS2_CHGTYP_SHIFT 0
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#define STATUS2_CHGDETRUN_SHIFT 3
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#define STATUS2_DCDTMR_SHIFT 4
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#define STATUS2_DBCHG_SHIFT 5
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#define STATUS2_VBVOLT_SHIFT 6
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#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
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#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
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#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
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#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
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#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
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/* MAX8997-MUIC STATUS3 register */
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#define STATUS3_OVP_SHIFT 2
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#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
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/* MAX8997-MUIC CONTROL1 register */
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#define COMN1SW_SHIFT 0
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#define COMP2SW_SHIFT 3
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#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
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#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
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#define SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
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#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
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#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
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#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
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#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
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#define MAX8997_ADC_GROUND 0x00
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#define MAX8997_ADC_MHL 0x01
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#define MAX8997_ADC_JIG_USB_1 0x18
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#define MAX8997_ADC_JIG_USB_2 0x19
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#define MAX8997_ADC_DESKDOCK 0x1a
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#define MAX8997_ADC_JIG_UART 0x1c
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#define MAX8997_ADC_CARDOCK 0x1d
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#define MAX8997_ADC_OPEN 0x1f
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struct max8997_muic_irq {
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unsigned int irq;
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const char *name;
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unsigned int virq;
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};
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static struct max8997_muic_irq muic_irqs[] = {
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{ MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
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{ MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
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{ MAX8997_MUICIRQ_ADC, "muic-ADC" },
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{ MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
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{ MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
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{ MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
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{ MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
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{ MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
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{ MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
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};
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struct max8997_muic_info {
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struct device *dev;
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struct i2c_client *muic;
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struct max8997_muic_platform_data *muic_pdata;
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int irq;
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struct work_struct irq_work;
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enum max8997_muic_charger_type pre_charger_type;
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int pre_adc;
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struct mutex mutex;
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struct extcon_dev *edev;
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};
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const char *max8997_extcon_cable[] = {
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[0] = "USB",
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[1] = "USB-Host",
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[2] = "TA",
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[3] = "Fast-charger",
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[4] = "Slow-charger",
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[5] = "Charge-downstream",
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[6] = "MHL",
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[7] = "Dock-desk",
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[8] = "Dock-card",
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[9] = "JIG",
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NULL,
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};
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static int max8997_muic_handle_usb(struct max8997_muic_info *info,
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enum max8997_muic_usb_type usb_type, bool attached)
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{
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int ret = 0;
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if (usb_type == MAX8997_USB_HOST) {
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/* switch to USB */
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ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
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attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
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SW_MASK);
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if (ret) {
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dev_err(info->dev, "failed to update muic register\n");
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goto out;
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}
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}
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switch (usb_type) {
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case MAX8997_USB_HOST:
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extcon_set_cable_state(info->edev, "USB-Host", attached);
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break;
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case MAX8997_USB_DEVICE:
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extcon_set_cable_state(info->edev, "USB", attached);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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out:
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return ret;
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}
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static int max8997_muic_handle_dock(struct max8997_muic_info *info,
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int adc, bool attached)
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{
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int ret = 0;
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/* switch to AUDIO */
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ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
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attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
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SW_MASK);
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if (ret) {
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dev_err(info->dev, "failed to update muic register\n");
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goto out;
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}
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switch (adc) {
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case MAX8997_ADC_DESKDOCK:
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extcon_set_cable_state(info->edev, "Dock-desk", attached);
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break;
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case MAX8997_ADC_CARDOCK:
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extcon_set_cable_state(info->edev, "Dock-card", attached);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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out:
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return ret;
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}
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static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
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bool attached)
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{
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int ret = 0;
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/* switch to UART */
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ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
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attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
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SW_MASK);
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if (ret) {
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dev_err(info->dev, "failed to update muic register\n");
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goto out;
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}
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extcon_set_cable_state(info->edev, "JIG", attached);
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out:
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return ret;
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}
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static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
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{
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int ret = 0;
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switch (info->pre_adc) {
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case MAX8997_ADC_GROUND:
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ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
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break;
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case MAX8997_ADC_MHL:
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extcon_set_cable_state(info->edev, "MHL", false);
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break;
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case MAX8997_ADC_JIG_USB_1:
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case MAX8997_ADC_JIG_USB_2:
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ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
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break;
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case MAX8997_ADC_DESKDOCK:
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case MAX8997_ADC_CARDOCK:
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ret = max8997_muic_handle_dock(info, info->pre_adc, false);
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break;
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case MAX8997_ADC_JIG_UART:
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ret = max8997_muic_handle_jig_uart(info, false);
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break;
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default:
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break;
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}
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return ret;
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}
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static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
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{
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int ret = 0;
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switch (adc) {
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case MAX8997_ADC_GROUND:
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ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
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break;
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case MAX8997_ADC_MHL:
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extcon_set_cable_state(info->edev, "MHL", true);
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break;
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case MAX8997_ADC_JIG_USB_1:
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case MAX8997_ADC_JIG_USB_2:
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ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
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break;
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case MAX8997_ADC_DESKDOCK:
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case MAX8997_ADC_CARDOCK:
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ret = max8997_muic_handle_dock(info, adc, true);
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break;
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case MAX8997_ADC_JIG_UART:
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ret = max8997_muic_handle_jig_uart(info, true);
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break;
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case MAX8997_ADC_OPEN:
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ret = max8997_muic_handle_adc_detach(info);
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break;
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default:
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ret = -EINVAL;
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goto out;
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}
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info->pre_adc = adc;
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out:
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return ret;
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}
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static int max8997_muic_handle_charger_type_detach(
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struct max8997_muic_info *info)
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{
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switch (info->pre_charger_type) {
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case MAX8997_CHARGER_TYPE_USB:
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extcon_set_cable_state(info->edev, "USB", false);
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break;
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case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
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extcon_set_cable_state(info->edev, "Charge-downstream", false);
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break;
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case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
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extcon_set_cable_state(info->edev, "TA", false);
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break;
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case MAX8997_CHARGER_TYPE_500MA:
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extcon_set_cable_state(info->edev, "Slow-charger", false);
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break;
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case MAX8997_CHARGER_TYPE_1A:
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extcon_set_cable_state(info->edev, "Fast-charger", false);
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break;
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default:
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return -EINVAL;
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break;
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}
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return 0;
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}
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static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
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enum max8997_muic_charger_type charger_type)
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{
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u8 adc;
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int ret;
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ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
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if (ret) {
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dev_err(info->dev, "failed to read muic register\n");
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goto out;
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}
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switch (charger_type) {
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case MAX8997_CHARGER_TYPE_NONE:
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ret = max8997_muic_handle_charger_type_detach(info);
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break;
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case MAX8997_CHARGER_TYPE_USB:
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if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
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max8997_muic_handle_usb(info,
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MAX8997_USB_DEVICE, true);
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}
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break;
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case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
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extcon_set_cable_state(info->edev, "Charge-downstream", true);
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break;
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case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
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extcon_set_cable_state(info->edev, "TA", true);
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break;
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case MAX8997_CHARGER_TYPE_500MA:
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extcon_set_cable_state(info->edev, "Slow-charger", true);
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break;
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case MAX8997_CHARGER_TYPE_1A:
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extcon_set_cable_state(info->edev, "Fast-charger", true);
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break;
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default:
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ret = -EINVAL;
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goto out;
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}
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info->pre_charger_type = charger_type;
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out:
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return ret;
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}
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static void max8997_muic_irq_work(struct work_struct *work)
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{
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struct max8997_muic_info *info = container_of(work,
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struct max8997_muic_info, irq_work);
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u8 status[2];
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u8 adc, chg_type;
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int irq_type = 0;
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int i, ret;
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mutex_lock(&info->mutex);
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ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
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2, status);
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if (ret) {
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dev_err(info->dev, "failed to read muic register\n");
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mutex_unlock(&info->mutex);
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return;
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}
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dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
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status[0], status[1]);
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for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
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if (info->irq == muic_irqs[i].virq)
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irq_type = muic_irqs[i].irq;
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switch (irq_type) {
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case MAX8997_MUICIRQ_ADC:
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adc = status[0] & STATUS1_ADC_MASK;
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adc >>= STATUS1_ADC_SHIFT;
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max8997_muic_handle_adc(info, adc);
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break;
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case MAX8997_MUICIRQ_ChgTyp:
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chg_type = status[1] & STATUS2_CHGTYP_MASK;
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chg_type >>= STATUS2_CHGTYP_SHIFT;
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max8997_muic_handle_charger_type(info, chg_type);
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break;
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default:
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dev_info(info->dev, "misc interrupt: irq %d occurred\n",
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irq_type);
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break;
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}
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mutex_unlock(&info->mutex);
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return;
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}
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static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
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{
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struct max8997_muic_info *info = data;
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dev_dbg(info->dev, "irq:%d\n", irq);
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info->irq = irq;
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schedule_work(&info->irq_work);
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return IRQ_HANDLED;
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}
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static void max8997_muic_detect_dev(struct max8997_muic_info *info)
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{
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int ret;
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u8 status[2], adc, chg_type;
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ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
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2, status);
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if (ret) {
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dev_err(info->dev, "failed to read muic register\n");
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return;
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}
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dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
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status[0], status[1]);
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adc = status[0] & STATUS1_ADC_MASK;
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adc >>= STATUS1_ADC_SHIFT;
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chg_type = status[1] & STATUS2_CHGTYP_MASK;
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chg_type >>= STATUS2_CHGTYP_SHIFT;
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max8997_muic_handle_adc(info, adc);
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max8997_muic_handle_charger_type(info, chg_type);
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}
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static int max8997_muic_probe(struct platform_device *pdev)
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{
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struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
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struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
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struct max8997_muic_info *info;
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int ret, i;
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info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
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GFP_KERNEL);
|
|
if (!info) {
|
|
dev_err(&pdev->dev, "failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info->dev = &pdev->dev;
|
|
info->muic = max8997->muic;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
mutex_init(&info->mutex);
|
|
|
|
INIT_WORK(&info->irq_work, max8997_muic_irq_work);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
|
|
struct max8997_muic_irq *muic_irq = &muic_irqs[i];
|
|
unsigned int virq = 0;
|
|
|
|
virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
|
|
if (!virq) {
|
|
ret = -EINVAL;
|
|
goto err_irq;
|
|
}
|
|
muic_irq->virq = virq;
|
|
|
|
ret = request_threaded_irq(virq, NULL, max8997_muic_irq_handler,
|
|
0, muic_irq->name, info);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"failed: irq request (IRQ: %d,"
|
|
" error :%d)\n",
|
|
muic_irq->irq, ret);
|
|
goto err_irq;
|
|
}
|
|
}
|
|
|
|
/* External connector */
|
|
info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
|
|
GFP_KERNEL);
|
|
if (!info->edev) {
|
|
dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
|
|
ret = -ENOMEM;
|
|
goto err_irq;
|
|
}
|
|
info->edev->name = DEV_NAME;
|
|
info->edev->supported_cable = max8997_extcon_cable;
|
|
ret = extcon_dev_register(info->edev, NULL);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register extcon device\n");
|
|
goto err_irq;
|
|
}
|
|
|
|
/* Initialize registers according to platform data */
|
|
if (pdata->muic_pdata) {
|
|
struct max8997_muic_platform_data *mdata = info->muic_pdata;
|
|
|
|
for (i = 0; i < mdata->num_init_data; i++) {
|
|
max8997_write_reg(info->muic, mdata->init_data[i].addr,
|
|
mdata->init_data[i].data);
|
|
}
|
|
}
|
|
|
|
/* Initial device detection */
|
|
max8997_muic_detect_dev(info);
|
|
|
|
return ret;
|
|
|
|
err_irq:
|
|
while (--i >= 0)
|
|
free_irq(muic_irqs[i].virq, info);
|
|
return ret;
|
|
}
|
|
|
|
static int max8997_muic_remove(struct platform_device *pdev)
|
|
{
|
|
struct max8997_muic_info *info = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
|
|
free_irq(muic_irqs[i].virq, info);
|
|
cancel_work_sync(&info->irq_work);
|
|
|
|
extcon_dev_unregister(info->edev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver max8997_muic_driver = {
|
|
.driver = {
|
|
.name = DEV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = max8997_muic_probe,
|
|
.remove = max8997_muic_remove,
|
|
};
|
|
|
|
module_platform_driver(max8997_muic_driver);
|
|
|
|
MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
|
|
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|