Release 4.7 drivers/phy/phy-qcom-ufs-i.h

Directory: drivers/phy
/*
 * Copyright (c) 2013-2015, Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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.
 *
 */

#ifndef UFS_QCOM_PHY_I_H_

#define UFS_QCOM_PHY_I_H_

#include <linux/module.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/phy/phy-qcom-ufs.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/delay.h>


#define readl_poll_timeout(addr, val, cond, sleep_us, timeout_us) \
({ \
        ktime_t timeout = ktime_add_us(ktime_get(), timeout_us); \
        might_sleep_if(timeout_us); \
        for (;;) { \
                (val) = readl(addr); \
                if (cond) \
                        break; \
                if (timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \
                        (val) = readl(addr); \
                        break; \
                } \
                if (sleep_us) \
                        usleep_range(DIV_ROUND_UP(sleep_us, 4), sleep_us); \
        } \
        (cond) ? 0 : -ETIMEDOUT; \
})


#define UFS_QCOM_PHY_CAL_ENTRY(reg, val)	\
	{                               \
                .reg_offset = reg,      \
                .cfg_value = val,       \
        }


#define UFS_QCOM_PHY_NAME_LEN	30

enum {
	
MASK_SERDES_START       = 0x1,
	
MASK_PCS_READY          = 0x1,
};

enum {
	
OFFSET_SERDES_START     = 0x0,
};


struct ufs_qcom_phy_stored_attributes {
	
u32 att;
	
u32 value;
};



struct ufs_qcom_phy_calibration {
	
u32 reg_offset;
	
u32 cfg_value;
};


struct ufs_qcom_phy_vreg {
	
const char *name;
	
struct regulator *reg;
	
int max_uA;
	
int min_uV;
	
int max_uV;
	
bool enabled;
	
bool is_always_on;
};


struct ufs_qcom_phy {
	
struct list_head list;
	
struct device *dev;
	
void __iomem *mmio;
	
void __iomem *dev_ref_clk_ctrl_mmio;
	
struct clk *tx_iface_clk;
	
struct clk *rx_iface_clk;
	
bool is_iface_clk_enabled;
	
struct clk *ref_clk_src;
	
struct clk *ref_clk_parent;
	
struct clk *ref_clk;
	
bool is_ref_clk_enabled;
	
bool is_dev_ref_clk_enabled;
	
struct ufs_qcom_phy_vreg vdda_pll;
	
struct ufs_qcom_phy_vreg vdda_phy;
	
struct ufs_qcom_phy_vreg vddp_ref_clk;
	
unsigned int quirks;

	/*
        * If UFS link is put into Hibern8 and if UFS PHY analog hardware is
        * power collapsed (by clearing UFS_PHY_POWER_DOWN_CONTROL), Hibern8
        * exit might fail even after powering on UFS PHY analog hardware.
        * Enabling this quirk will help to solve above issue by doing
        * custom PHY settings just before PHY analog power collapse.
        */
	
#define UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE	BIT(0)

	
u8 host_ctrl_rev_major;
	
u16 host_ctrl_rev_minor;
	
u16 host_ctrl_rev_step;

	
char name[UFS_QCOM_PHY_NAME_LEN];
	
struct ufs_qcom_phy_calibration *cached_regs;
	
int cached_regs_table_size;
	
bool is_powered_on;
	
struct ufs_qcom_phy_specific_ops *phy_spec_ops;
};

/**
 * struct ufs_qcom_phy_specific_ops - set of pointers to functions which have a
 * specific implementation per phy. Each UFS phy, should implement
 * those functions according to its spec and requirements
 * @calibrate_phy: pointer to a function that calibrate the phy
 * @start_serdes: pointer to a function that starts the serdes
 * @is_physical_coding_sublayer_ready: pointer to a function that
 * checks pcs readiness. returns 0 for success and non-zero for error.
 * @set_tx_lane_enable: pointer to a function that enable tx lanes
 * @power_control: pointer to a function that controls analog rail of phy
 * and writes to QSERDES_RX_SIGDET_CNTRL attribute
 */

struct ufs_qcom_phy_specific_ops {
	
int (*calibrate_phy)(struct ufs_qcom_phy *phy, bool is_rate_B);
	
void (*start_serdes)(struct ufs_qcom_phy *phy);
	
int (*is_physical_coding_sublayer_ready)(struct ufs_qcom_phy *phy);
	
void (*set_tx_lane_enable)(struct ufs_qcom_phy *phy, u32 val);
	
void (*power_control)(struct ufs_qcom_phy *phy, bool val);
};

struct ufs_qcom_phy *get_ufs_qcom_phy(struct phy *generic_phy);
int ufs_qcom_phy_power_on(struct phy *generic_phy);
int ufs_qcom_phy_power_off(struct phy *generic_phy);
int ufs_qcom_phy_exit(struct phy *generic_phy);
int ufs_qcom_phy_init_clks(struct phy *generic_phy,
			struct ufs_qcom_phy *phy_common);
int ufs_qcom_phy_init_vregulators(struct phy *generic_phy,
			struct ufs_qcom_phy *phy_common);
int ufs_qcom_phy_remove(struct phy *generic_phy,
		       struct ufs_qcom_phy *ufs_qcom_phy);
struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev,
			struct ufs_qcom_phy *common_cfg,
			const struct phy_ops *ufs_qcom_phy_gen_ops,
			struct ufs_qcom_phy_specific_ops *phy_spec_ops);
int ufs_qcom_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
			struct ufs_qcom_phy_calibration *tbl_A, int tbl_size_A,
			struct ufs_qcom_phy_calibration *tbl_B, int tbl_size_B,
			bool is_rate_B);
#endif
Overall Contributors
Person Tokens Prop Commits CommitProp
yaniv gardi yaniv gardi 452 99.78% 2 66.67%
axel lin axel lin 1 0.22% 1 33.33%
Total 453 100.00% 3 100.00%
  Directory: drivers/phy

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	Person	Tokens	Prop	Commits	CommitProp
yaniv gardi	yaniv gardi	452	99.78%	2	66.67%
axel lin	axel lin	1	0.22%	1	33.33%
	Total	453	100.00%	3	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/phy/phy-qcom-ufs-i.h

Overall Contributors
