816b8e6e04
The wcd9310 codec driver which is slimbus slave can access codec registers when slimbus is suspended. This can cause register read/write failure. Fix to make sure slimbus is awake before accessing wcd9310 codec's registers through slimbus. CRs-fixed: 331338 Change-Id: Iddbdb1614c18dab4bee4f0cc7951884f34cb7173 Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
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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 version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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#ifndef __MFD_TABLA_CORE_H__
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#define __MFD_TABLA_CORE_H__
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#include <linux/interrupt.h>
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#include <linux/wakelock.h>
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#define TABLA_NUM_IRQ_REGS 3
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#define TABLA_SLIM_NUM_PORT_REG 3
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#define TABLA_INTERFACE_TYPE_SLIMBUS 0x00
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#define TABLA_INTERFACE_TYPE_I2C 0x01
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#define TABLA_VERSION_1_0 0
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#define TABLA_VERSION_1_1 1
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#define TABLA_VERSION_2_0 2
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#define TABLA_IS_1_X(ver) \
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(((ver == TABLA_VERSION_1_0) || (ver == TABLA_VERSION_1_1)) ? 1 : 0)
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#define TABLA_IS_2_0(ver) ((ver == TABLA_VERSION_2_0) ? 1 : 0)
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enum {
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TABLA_IRQ_SLIMBUS = 0,
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TABLA_IRQ_MBHC_REMOVAL,
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TABLA_IRQ_MBHC_SHORT_TERM,
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TABLA_IRQ_MBHC_PRESS,
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TABLA_IRQ_MBHC_RELEASE,
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TABLA_IRQ_MBHC_POTENTIAL,
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TABLA_IRQ_MBHC_INSERTION,
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TABLA_IRQ_BG_PRECHARGE,
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TABLA_IRQ_PA1_STARTUP,
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TABLA_IRQ_PA2_STARTUP,
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TABLA_IRQ_PA3_STARTUP,
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TABLA_IRQ_PA4_STARTUP,
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TABLA_IRQ_PA5_STARTUP,
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TABLA_IRQ_MICBIAS1_PRECHARGE,
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TABLA_IRQ_MICBIAS2_PRECHARGE,
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TABLA_IRQ_MICBIAS3_PRECHARGE,
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TABLA_IRQ_HPH_PA_OCPL_FAULT,
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TABLA_IRQ_HPH_PA_OCPR_FAULT,
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TABLA_IRQ_EAR_PA_OCPL_FAULT,
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TABLA_IRQ_HPH_L_PA_STARTUP,
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TABLA_IRQ_HPH_R_PA_STARTUP,
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TABLA_IRQ_EAR_PA_STARTUP,
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TABLA_NUM_IRQS,
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};
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enum tabla_pm_state {
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TABLA_PM_SLEEPABLE,
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TABLA_PM_AWAKE,
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TABLA_PM_ASLEEP,
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};
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struct tabla {
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struct device *dev;
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struct slim_device *slim;
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struct slim_device *slim_slave;
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struct mutex io_lock;
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struct mutex xfer_lock;
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struct mutex irq_lock;
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u8 version;
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unsigned int irq_base;
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unsigned int irq;
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u8 irq_masks_cur[TABLA_NUM_IRQ_REGS];
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u8 irq_masks_cache[TABLA_NUM_IRQ_REGS];
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u8 irq_level[TABLA_NUM_IRQ_REGS];
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int reset_gpio;
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int (*read_dev)(struct tabla *tabla, unsigned short reg,
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int bytes, void *dest, bool interface_reg);
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int (*write_dev)(struct tabla *tabla, unsigned short reg,
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int bytes, void *src, bool interface_reg);
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struct regulator_bulk_data *supplies;
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enum tabla_pm_state pm_state;
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struct mutex pm_lock;
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/* pm_wq notifies change of pm_state */
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wait_queue_head_t pm_wq;
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struct wake_lock wlock;
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int wlock_holders;
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};
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int tabla_reg_read(struct tabla *tabla, unsigned short reg);
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int tabla_reg_write(struct tabla *tabla, unsigned short reg, u8 val);
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int tabla_interface_reg_read(struct tabla *tabla, unsigned short reg);
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int tabla_interface_reg_write(struct tabla *tabla, unsigned short reg, u8 val);
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int tabla_bulk_read(struct tabla *tabla, unsigned short reg, int count,
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u8 *buf);
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int tabla_bulk_write(struct tabla *tabla, unsigned short reg, int count,
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u8 *buf);
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int tabla_irq_init(struct tabla *tabla);
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void tabla_irq_exit(struct tabla *tabla);
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int tabla_get_logical_addresses(u8 *pgd_la, u8 *inf_la);
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int tabla_get_intf_type(void);
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void tabla_lock_sleep(struct tabla *tabla);
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void tabla_unlock_sleep(struct tabla *tabla);
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enum tabla_pm_state tabla_pm_cmpxchg(struct tabla *tabla, enum tabla_pm_state o,
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enum tabla_pm_state n);
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static inline int tabla_request_irq(struct tabla *tabla, int irq,
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irq_handler_t handler, const char *name,
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void *data)
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{
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if (!tabla->irq_base)
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return -EINVAL;
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return request_threaded_irq(tabla->irq_base + irq, NULL, handler,
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IRQF_TRIGGER_RISING, name,
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data);
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}
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static inline void tabla_free_irq(struct tabla *tabla, int irq, void *data)
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{
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if (!tabla->irq_base)
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return;
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free_irq(tabla->irq_base + irq, data);
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}
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static inline void tabla_enable_irq(struct tabla *tabla, int irq)
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{
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if (!tabla->irq_base)
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return;
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enable_irq(tabla->irq_base + irq);
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}
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static inline void tabla_disable_irq(struct tabla *tabla, int irq)
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{
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if (!tabla->irq_base)
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return;
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disable_irq_nosync(tabla->irq_base + irq);
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}
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#endif
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