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linux-next/drivers/soundwire/intel.h
Pierre-Louis Bossart de763fa888 soundwire: intel: pass link_mask information to each master
While the hardware exposes independent bits to power-up each master,
the recommended sequence is to power all links or none. Idle links can
still use the clock stop mode while the master is powered.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200901150556.19432-10-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-09-03 16:14:39 +05:30

57 lines
1.7 KiB
C

/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
/* Copyright(c) 2015-17 Intel Corporation. */
#ifndef __SDW_INTEL_LOCAL_H
#define __SDW_INTEL_LOCAL_H
/**
* struct sdw_intel_link_res - Soundwire Intel link resource structure,
* typically populated by the controller driver.
* @pdev: platform_device
* @mmio_base: mmio base of SoundWire registers
* @registers: Link IO registers base
* @shim: Audio shim pointer
* @alh: ALH (Audio Link Hub) pointer
* @irq: Interrupt line
* @ops: Shim callback ops
* @dev: device implementing hw_params and free callbacks
* @shim_lock: mutex to handle access to shared SHIM registers
* @shim_mask: global pointer to check SHIM register initialization
* @clock_stop_quirks: mask defining requested behavior on pm_suspend
* @link_mask: global mask needed for power-up/down sequences
* @cdns: Cadence master descriptor
* @list: used to walk-through all masters exposed by the same controller
*/
struct sdw_intel_link_res {
struct platform_device *pdev;
void __iomem *mmio_base; /* not strictly needed, useful for debug */
void __iomem *registers;
void __iomem *shim;
void __iomem *alh;
int irq;
const struct sdw_intel_ops *ops;
struct device *dev;
struct mutex *shim_lock; /* protect shared registers */
u32 *shim_mask;
u32 clock_stop_quirks;
u32 link_mask;
struct sdw_cdns *cdns;
struct list_head list;
};
struct sdw_intel {
struct sdw_cdns cdns;
int instance;
struct sdw_intel_link_res *link_res;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif
};
#define SDW_INTEL_QUIRK_MASK_BUS_DISABLE BIT(1)
int intel_master_startup(struct platform_device *pdev);
int intel_master_process_wakeen_event(struct platform_device *pdev);
#endif /* __SDW_INTEL_LOCAL_H */