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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-17 09:43:59 +08:00

scsi: ufs: make the UFS variant a platform device

This change turns the UFS variant (SCSI_UFS_QCOM) into a UFS
a platform device.
In order to do so a few additional changes are required:
1. The ufshcd-pltfrm is no longer serves as a platform device.
   Now it only serves as a group of platform APIs such as PM APIs
   (runtime suspend/resume, system suspend/resume etc), parsers of
   clocks, regulators and pm_levels from DT.
2. What used to be the old platform "probe" is now "only"
   a pltfrm_init() routine, that does exactly the same, but only
   being called by the new probe function of the UFS variant.

Reviewed-by: Rob Herring <robherring2@gmail.com>
Reviewed-by: Gilad Broner <gbroner@codeaurora.org>
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Yaniv Gardi 2015-10-28 13:15:49 +02:00 committed by Martin K. Petersen
parent 0263bcd0e8
commit 47555a5c8a
7 changed files with 207 additions and 74 deletions

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@ -0,0 +1,58 @@
* Qualcomm Technologies Inc Universal Flash Storage (UFS) PHY
UFSPHY nodes are defined to describe on-chip UFS PHY hardware macro.
Each UFS PHY node should have its own node.
To bind UFS PHY with UFS host controller, the controller node should
contain a phandle reference to UFS PHY node.
Required properties:
- compatible : compatible list, contains "qcom,ufs-phy-qmp-20nm"
or "qcom,ufs-phy-qmp-14nm" according to the relevant phy in use.
- reg : should contain PHY register address space (mandatory),
- reg-names : indicates various resources passed to driver (via reg proptery) by name.
Required "reg-names" is "phy_mem".
- #phy-cells : This property shall be set to 0
- vdda-phy-supply : phandle to main PHY supply for analog domain
- vdda-pll-supply : phandle to PHY PLL and Power-Gen block power supply
- clocks : List of phandle and clock specifier pairs
- clock-names : List of clock input name strings sorted in the same
order as the clocks property. "ref_clk_src", "ref_clk",
"tx_iface_clk" & "rx_iface_clk" are mandatory but
"ref_clk_parent" is optional
Optional properties:
- vdda-phy-max-microamp : specifies max. load that can be drawn from phy supply
- vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply
- vddp-ref-clk-supply : phandle to UFS device ref_clk pad power supply
- vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply
- vddp-ref-clk-always-on : specifies if this supply needs to be kept always on
Example:
ufsphy1: ufsphy@0xfc597000 {
compatible = "qcom,ufs-phy-qmp-20nm";
reg = <0xfc597000 0x800>;
reg-names = "phy_mem";
#phy-cells = <0>;
vdda-phy-supply = <&pma8084_l4>;
vdda-pll-supply = <&pma8084_l12>;
vdda-phy-max-microamp = <50000>;
vdda-pll-max-microamp = <1000>;
clock-names = "ref_clk_src",
"ref_clk_parent",
"ref_clk",
"tx_iface_clk",
"rx_iface_clk";
clocks = <&clock_rpm clk_ln_bb_clk>,
<&clock_gcc clk_pcie_1_phy_ldo >,
<&clock_gcc clk_ufs_phy_ldo>,
<&clock_gcc clk_gcc_ufs_tx_cfg_clk>,
<&clock_gcc clk_gcc_ufs_rx_cfg_clk>;
};
ufshc@0xfc598000 {
...
phys = <&ufsphy1>;
phy-names = "ufsphy";
};

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@ -4,11 +4,18 @@ UFSHC nodes are defined to describe on-chip UFS host controllers.
Each UFS controller instance should have its own node.
Required properties:
- compatible : compatible list, contains "jedec,ufs-1.1"
- compatible : must contain "jedec,ufs-1.1", may also list one or more
of the following:
"qcom,msm8994-ufshc"
"qcom,msm8996-ufshc"
"qcom,ufshc"
- interrupts : <interrupt mapping for UFS host controller IRQ>
- reg : <registers mapping>
Optional properties:
- phys : phandle to UFS PHY node
- phy-names : the string "ufsphy" when is found in a node, along
with "phys" attribute, provides phandle to UFS PHY node
- vdd-hba-supply : phandle to UFS host controller supply regulator node
- vcc-supply : phandle to VCC supply regulator node
- vccq-supply : phandle to VCCQ supply regulator node
@ -54,4 +61,6 @@ Example:
clocks = <&core 0>, <&ref 0>, <&iface 0>;
clock-names = "core_clk", "ref_clk", "iface_clk";
freq-table-hz = <100000000 200000000>, <0 0>, <0 0>;
phys = <&ufsphy1>;
phy-names = "ufsphy";
};

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@ -19,6 +19,7 @@
#include <linux/phy/phy-qcom-ufs.h>
#include "ufshcd.h"
#include "ufshcd-pltfrm.h"
#include "unipro.h"
#include "ufs-qcom.h"
#include "ufshci.h"
@ -1036,7 +1037,7 @@ void ufs_qcom_clk_scale_notify(struct ufs_hba *hba)
* The variant operations configure the necessary controller and PHY
* handshake during initialization.
*/
static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
static struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
.name = "qcom",
.init = ufs_qcom_init,
.exit = ufs_qcom_exit,
@ -1050,4 +1051,63 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
.resume = ufs_qcom_resume,
};
/**
* ufs_qcom_probe - probe routine of the driver
* @pdev: pointer to Platform device handle
*
* Return zero for success and non-zero for failure
*/
static int ufs_qcom_probe(struct platform_device *pdev)
{
int err;
struct device *dev = &pdev->dev;
/* Perform generic probe */
err = ufshcd_pltfrm_init(pdev, &ufs_hba_qcom_vops);
if (err)
dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
return err;
}
/**
* ufs_qcom_remove - set driver_data of the device to NULL
* @pdev: pointer to platform device handle
*
* Always return 0
*/
static int ufs_qcom_remove(struct platform_device *pdev)
{
struct ufs_hba *hba = platform_get_drvdata(pdev);
pm_runtime_get_sync(&(pdev)->dev);
ufshcd_remove(hba);
return 0;
}
static const struct of_device_id ufs_qcom_of_match[] = {
{ .compatible = "qcom,ufshc"},
{},
};
static const struct dev_pm_ops ufs_qcom_pm_ops = {
.suspend = ufshcd_pltfrm_suspend,
.resume = ufshcd_pltfrm_resume,
.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
.runtime_resume = ufshcd_pltfrm_runtime_resume,
.runtime_idle = ufshcd_pltfrm_runtime_idle,
};
static struct platform_driver ufs_qcom_pltform = {
.probe = ufs_qcom_probe,
.remove = ufs_qcom_remove,
.shutdown = ufshcd_pltfrm_shutdown,
.driver = {
.name = "ufshcd-qcom",
.pm = &ufs_qcom_pm_ops,
.of_match_table = of_match_ptr(ufs_qcom_of_match),
},
};
module_platform_driver(ufs_qcom_pltform);
MODULE_LICENSE("GPL v2");

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@ -38,20 +38,7 @@
#include <linux/of.h>
#include "ufshcd.h"
static const struct of_device_id ufs_of_match[];
static struct ufs_hba_variant_ops *get_variant_ops(struct device *dev)
{
if (dev->of_node) {
const struct of_device_id *match;
match = of_match_node(ufs_of_match, dev->of_node);
if (match)
return (struct ufs_hba_variant_ops *)match->data;
}
return NULL;
}
#include "ufshcd-pltfrm.h"
static int ufshcd_parse_clock_info(struct ufs_hba *hba)
{
@ -245,10 +232,11 @@ out:
* Returns 0 if successful
* Returns non-zero otherwise
*/
static int ufshcd_pltfrm_suspend(struct device *dev)
int ufshcd_pltfrm_suspend(struct device *dev)
{
return ufshcd_system_suspend(dev_get_drvdata(dev));
}
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_suspend);
/**
* ufshcd_pltfrm_resume - resume power management function
@ -257,43 +245,47 @@ static int ufshcd_pltfrm_suspend(struct device *dev)
* Returns 0 if successful
* Returns non-zero otherwise
*/
static int ufshcd_pltfrm_resume(struct device *dev)
int ufshcd_pltfrm_resume(struct device *dev)
{
return ufshcd_system_resume(dev_get_drvdata(dev));
}
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_resume);
static int ufshcd_pltfrm_runtime_suspend(struct device *dev)
int ufshcd_pltfrm_runtime_suspend(struct device *dev)
{
return ufshcd_runtime_suspend(dev_get_drvdata(dev));
}
static int ufshcd_pltfrm_runtime_resume(struct device *dev)
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_suspend);
int ufshcd_pltfrm_runtime_resume(struct device *dev)
{
return ufshcd_runtime_resume(dev_get_drvdata(dev));
}
static int ufshcd_pltfrm_runtime_idle(struct device *dev)
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_resume);
int ufshcd_pltfrm_runtime_idle(struct device *dev)
{
return ufshcd_runtime_idle(dev_get_drvdata(dev));
}
#else /* !CONFIG_PM */
#define ufshcd_pltfrm_suspend NULL
#define ufshcd_pltfrm_resume NULL
#define ufshcd_pltfrm_runtime_suspend NULL
#define ufshcd_pltfrm_runtime_resume NULL
#define ufshcd_pltfrm_runtime_idle NULL
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_idle);
#endif /* CONFIG_PM */
static void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
{
ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
}
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
/**
* ufshcd_pltfrm_probe - probe routine of the driver
* ufshcd_pltfrm_init - probe routine of the driver
* @pdev: pointer to Platform device handle
* @vops: pointer to variant ops
*
* Returns 0 on success, non-zero value on failure
*/
static int ufshcd_pltfrm_probe(struct platform_device *pdev)
int ufshcd_pltfrm_init(struct platform_device *pdev,
struct ufs_hba_variant_ops *vops)
{
struct ufs_hba *hba;
void __iomem *mmio_base;
@ -321,19 +313,19 @@ static int ufshcd_pltfrm_probe(struct platform_device *pdev)
goto out;
}
hba->vops = get_variant_ops(&pdev->dev);
hba->vops = vops;
err = ufshcd_parse_clock_info(hba);
if (err) {
dev_err(&pdev->dev, "%s: clock parse failed %d\n",
__func__, err);
goto out;
goto dealloc_host;
}
err = ufshcd_parse_regulator_info(hba);
if (err) {
dev_err(&pdev->dev, "%s: regulator init failed %d\n",
__func__, err);
goto out;
goto dealloc_host;
}
pm_runtime_set_active(&pdev->dev);
@ -352,50 +344,12 @@ static int ufshcd_pltfrm_probe(struct platform_device *pdev)
out_disable_rpm:
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
dealloc_host:
ufshcd_dealloc_host(hba);
out:
return err;
}
/**
* ufshcd_pltfrm_remove - remove platform driver routine
* @pdev: pointer to platform device handle
*
* Returns 0 on success, non-zero value on failure
*/
static int ufshcd_pltfrm_remove(struct platform_device *pdev)
{
struct ufs_hba *hba = platform_get_drvdata(pdev);
pm_runtime_get_sync(&(pdev)->dev);
ufshcd_remove(hba);
return 0;
}
static const struct of_device_id ufs_of_match[] = {
{ .compatible = "jedec,ufs-1.1"},
{},
};
static const struct dev_pm_ops ufshcd_dev_pm_ops = {
.suspend = ufshcd_pltfrm_suspend,
.resume = ufshcd_pltfrm_resume,
.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
.runtime_resume = ufshcd_pltfrm_runtime_resume,
.runtime_idle = ufshcd_pltfrm_runtime_idle,
};
static struct platform_driver ufshcd_pltfrm_driver = {
.probe = ufshcd_pltfrm_probe,
.remove = ufshcd_pltfrm_remove,
.shutdown = ufshcd_pltfrm_shutdown,
.driver = {
.name = "ufshcd",
.pm = &ufshcd_dev_pm_ops,
.of_match_table = ufs_of_match,
},
};
module_platform_driver(ufshcd_pltfrm_driver);
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_init);
MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");

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@ -0,0 +1,41 @@
/* Copyright (c) 2015, The 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 UFSHCD_PLTFRM_H_
#define UFSHCD_PLTFRM_H_
#include "ufshcd.h"
int ufshcd_pltfrm_init(struct platform_device *pdev,
struct ufs_hba_variant_ops *vops);
void ufshcd_pltfrm_shutdown(struct platform_device *pdev);
#ifdef CONFIG_PM
int ufshcd_pltfrm_suspend(struct device *dev);
int ufshcd_pltfrm_resume(struct device *dev);
int ufshcd_pltfrm_runtime_suspend(struct device *dev);
int ufshcd_pltfrm_runtime_resume(struct device *dev);
int ufshcd_pltfrm_runtime_idle(struct device *dev);
#else /* !CONFIG_PM */
#define ufshcd_pltfrm_suspend NULL
#define ufshcd_pltfrm_resume NULL
#define ufshcd_pltfrm_runtime_suspend NULL
#define ufshcd_pltfrm_runtime_resume NULL
#define ufshcd_pltfrm_runtime_idle NULL
#endif /* CONFIG_PM */
#endif /* UFSHCD_PLTFRM_H_ */

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@ -5347,6 +5347,16 @@ void ufshcd_remove(struct ufs_hba *hba)
}
EXPORT_SYMBOL_GPL(ufshcd_remove);
/**
* ufshcd_dealloc_host - deallocate Host Bus Adapter (HBA)
* @hba: pointer to Host Bus Adapter (HBA)
*/
void ufshcd_dealloc_host(struct ufs_hba *hba)
{
scsi_host_put(hba->host);
}
EXPORT_SYMBOL_GPL(ufshcd_dealloc_host);
/**
* ufshcd_set_dma_mask - Set dma mask based on the controller
* addressing capability

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@ -576,6 +576,7 @@ static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
}
int ufshcd_alloc_host(struct device *, struct ufs_hba **);
void ufshcd_dealloc_host(struct ufs_hba *);
int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
void ufshcd_remove(struct ufs_hba *);