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SubjectRe: [RFC PATCH 2/5] phy: Add WIP Exynos 5250 support to the Exynos USB PHY driver
From
Hi Kishon,


On Fri, Oct 25, 2013 at 9:13 PM, Kishon Vijay Abraham I <kishon@ti.com> wrote:
> Hi,
>
> On Friday 25 October 2013 07:45 PM, Kamil Debski wrote:
>> Add support for Exynos 5250. This is work-in-progress commit. Not
>> for merging.
>>
>> Signed-off-by: Kamil Debski <k.debski@samsung.com>
>> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
>> ---
>> drivers/phy/Kconfig | 7 +
>> drivers/phy/Makefile | 1 +
>> drivers/phy/phy-exynos-usb.c | 10 +
>> drivers/phy/phy-exynos-usb.h | 1 +
>> drivers/phy/phy-exynos5250-usb.c | 411 ++++++++++++++++++++++++++++++++++++++
>> 5 files changed, 430 insertions(+)
>> create mode 100644 drivers/phy/phy-exynos5250-usb.c
>>
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index 2f7ac0a..0f598d0 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -36,4 +36,11 @@ config PHY_EXYNOS4212_USB
>> help
>> Enable USB PHY support for Exynos 4212
>>
>> +config PHY_EXYNOS5250_USB
>> + bool "Support for Exynos 5250"
>> + depends on PHY_EXYNOS_USB
>
> This should be a separate driver. Not necessary to use PHY_EXYNOS_USB.
>> + depends on SOC_EXYNOS5250
>> + help
>> + Enable USB PHY support for Exynos 5250
>> +
>> endmenu
>> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
>> index ca3dc82..0dff0dd 100644
>> --- a/drivers/phy/Makefile
>> +++ b/drivers/phy/Makefile
>> @@ -6,3 +6,4 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o
>> obj-$(CONFIG_PHY_EXYNOS_USB) += phy-exynos-usb.o
>> obj-$(CONFIG_PHY_EXYNOS4210_USB) += phy-exynos4210-usb.o
>> obj-$(CONFIG_PHY_EXYNOS4212_USB) += phy-exynos4212-usb.o
>> +obj-$(CONFIG_PHY_EXYNOS5250_USB) += phy-exynos5250-usb.o
>> diff --git a/drivers/phy/phy-exynos-usb.c b/drivers/phy/phy-exynos-usb.c
>> index d4a26df..172b774 100644
>> --- a/drivers/phy/phy-exynos-usb.c
>> +++ b/drivers/phy/phy-exynos-usb.c
>> @@ -212,6 +212,10 @@ extern const struct uphy_config exynos4210_uphy_config;
>> extern const struct uphy_config exynos4212_uphy_config;
>> #endif
>>
>> +#ifdef CONFIG_PHY_EXYNOS5250_USB
>> +extern const struct uphy_config exynos5250_uphy_config;
>> +#endif
>> +
>> static const struct of_device_id exynos_uphy_of_match[] = {
>> #ifdef CONFIG_PHY_EXYNOS4210_USB
>> {
>> @@ -225,6 +229,12 @@ static const struct of_device_id exynos_uphy_of_match[] = {
>> .data = &exynos4212_uphy_config,
>> },
>> #endif
>> +#ifdef CONFIG_PHY_EXYNOS5250_USB
>> + {
>> + .compatible = "samsung,exynos5250-usbphy",
>> + .data = &exynos5250_uphy_config,
>> + },
>> +#endif
>> { },
>> };
>>
>> diff --git a/drivers/phy/phy-exynos-usb.h b/drivers/phy/phy-exynos-usb.h
>> index f45cb3c..a9febfa 100644
>> --- a/drivers/phy/phy-exynos-usb.h
>> +++ b/drivers/phy/phy-exynos-usb.h
>> @@ -42,6 +42,7 @@ enum samsung_cpu_type {
>> TYPE_S3C64XX,
>> TYPE_EXYNOS4210,
>> TYPE_EXYNOS4212,
>> + TYPE_EXYNOS5250,
>
> No cpu types here.

One question here.
In case we move to single driver for Exynos4 SoCs (4210, 4212 and 4412
later) as well as S5PV210,
there will be certain things changing from one SoC to another, how
should we target that in case we
don't have CPU types ?
May be i am misinterpreting your suggestion ?

>> };
>>
>> enum uphy_state {
>> diff --git a/drivers/phy/phy-exynos5250-usb.c b/drivers/phy/phy-exynos5250-usb.c
>> new file mode 100644
>> index 0000000..156093b
>> --- /dev/null
>> +++ b/drivers/phy/phy-exynos5250-usb.c
>> @@ -0,0 +1,411 @@
>> +/*
>> + * Samsung S5P/EXYNOS SoC series USB PHY driver
>> + *
>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
>> + * Author: Kamil Debski <k.debski@samsung.com>
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License version 2 as
>> + * published by the Free Software Foundation.
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/spinlock.h>
>> +#include "phy-exynos-usb.h"
>> +
>> +/* Exynos USB PHY registers */
>> +#define EXYNOS_5250_REFCLKSEL_CRYSTAL 0x0
>> +#define EXYNOS_5250_REFCLKSEL_XO 0x1
>> +#define EXYNOS_5250_REFCLKSEL_CLKCORE 0x2
>> +
>> +#define EXYNOS_5250_FSEL_9MHZ6 0x0
>> +#define EXYNOS_5250_FSEL_10MHZ 0x1
>> +#define EXYNOS_5250_FSEL_12MHZ 0x2
>> +#define EXYNOS_5250_FSEL_19MHZ2 0x3
>> +#define EXYNOS_5250_FSEL_20MHZ 0x4
>> +#define EXYNOS_5250_FSEL_24MHZ 0x5
>> +#define EXYNOS_5250_FSEL_50MHZ 0x7
>> +
>> +/* Normal host */
>> +#define EXYNOS_5250_HOSTPHYCTRL0 0x0
>> +
>> +#define EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL (0x1 << 31)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_REFCLKSEL_SHIFT 19
>> +#define EXYNOS_5250_HOSTPHYCTRL0_REFCLKSEL_MASK \
>> + (0x3 << EXYNOS_5250_HOSTPHYCTRL0_REFCLKSEL_SHIFT)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_FSEL_SHIFT 16
>> +#define EXYNOS_5250_HOSTPHYCTRL0_FSEL_MASK \
>> + (0x7 << EXYNOS_5250_HOSTPHYCTRL0_FSEL_SHIFT)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_TESTBURNIN (0x1 << 11)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_RETENABLE (0x1 << 10)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_COMMON_ON_N (0x1 << 9)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_MASK (0x3 << 7)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_DUAL (0x0 << 7)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_ID0 (0x1 << 7)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_ANALOGTEST (0x2 << 7)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_SIDDQ (0x1 << 6)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP (0x1 << 5)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND (0x1 << 4)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_WORDINTERFACE (0x1 << 3)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST (0x1 << 2)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST (0x1 << 1)
>> +#define EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST (0x1 << 0)
>> +
>> +/* HSIC0 & HSCI1 */
>> +#define EXYNOS_5250_HOSTPHYCTRL1 0x10
>> +#define EXYNOS_5250_HOSTPHYCTRL2 0x20
>> +
>> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKSEL_MASK (0x3 << 23)
>> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_MASK (0x7f << 16)
>> +#define EXYNOS_5250_HOSTPHYCTRLX_SIDDQ (0x1 << 6)
>> +#define EXYNOS_5250_HOSTPHYCTRLX_FORCESLEEP (0x1 << 5)
>> +#define EXYNOS_5250_HOSTPHYCTRLX_FORCESUSPEND (0x1 << 4)
>> +#define EXYNOS_5250_HOSTPHYCTRLX_WORDINTERFACE (0x1 << 3)
>> +#define EXYNOS_5250_HOSTPHYCTRLX_UTMISWRST (0x1 << 2)
>> +#define EXYNOS_5250_HOSTPHYCTRLX_PHYSWRST (0x1 << 0)
>> +
>> +/* EHCI control */
>> +#define EXYNOS_5250_HOSTEHCICTRL 0x30
>> +#define EXYNOS_5250_HOSTEHCICTRL_ENAINCRXALIGN (0x1 << 29)
>> +#define EXYNOS_5250_HOSTEHCICTRL_ENAINCR4 (0x1 << 28)
>> +#define EXYNOS_5250_HOSTEHCICTRL_ENAINCR8 (0x1 << 27)
>> +#define EXYNOS_5250_HOSTEHCICTRL_ENAINCR16 (0x1 << 26)
>> +#define EXYNOS_5250_HOSTEHCICTRL_AUTOPPDONOVRCUREN (0x1 << 25)
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_SHIFT 19
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_MASK \
>> + (0x3f << EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_SHIFT)
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL1_SHIFT 13
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL1_MASK \
>> + (0x3f << EXYNOS_5250_HOSTEHCICTRL_FLADJVAL1_SHIFT)
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL2_SHIFT 7
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_MASK \
>> + (0x3f << EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_SHIFT)
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVALHOST_SHIFT 1
>> +#define EXYNOS_5250_HOSTEHCICTRL_FLADJVALHOST_MASK \
>> + (0x1 << EXYNOS_5250_HOSTEHCICTRL_FLADJVALHOST_SHIFT)
>> +#define EXYNOS_5250_HOSTEHCICTRL_SIMULATIONMODE (0x1 << 0)
>> +
>> +/* OHCI control */
>> +#define EXYNOS_5250_HOSTOHCICTRL 0x34
>> +#define EXYNOS_5250_HOSTOHCICTRL_FRAMELENVAL_SHIFT 1
>> +#define EXYNOS_5250_HOSTOHCICTRL_FRAMELENVAL_MASK \
>> + (0x3ff << EXYNOS_5250_HOSTOHCICTRL_FRAMELENVAL_SHIFT)
>> +#define EXYNOS_5250_HOSTOHCICTRL_FRAMELENVALEN (0x1 << 0)
>> +
>> +/* USBOTG */
>> +#define EXYNOS_5250_USBOTGSYS 0x38
>> +#define EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET (0x1 << 14)
>> +#define EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG (0x1 << 13)
>> +#define EXYNOS_5250_USBOTGSYS_PHY_SW_RST (0x1 << 12)
>> +#define EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT 9
>> +#define EXYNOS_5250_USBOTGSYS_REFCLKSEL_MASK \
>> + (0x3 << EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT)
>> +#define EXYNOS_5250_USBOTGSYS_ID_PULLUP (0x1 << 8)
>> +#define EXYNOS_5250_USBOTGSYS_COMMON_ON (0x1 << 7)
>> +#define EXYNOS_5250_USBOTGSYS_FSEL_SHIFT 4
>> +#define EXYNOS_5250_USBOTGSYS_FSEL_MASK \
>> + (0x3 << EXYNOS_5250_USBOTGSYS_FSEL_SHIFT)
>> +#define EXYNOS_5250_USBOTGSYS_FORCE_SLEEP (0x1 << 3)
>> +#define EXYNOS_5250_USBOTGSYS_OTGDISABLE (0x1 << 2)
>> +#define EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG (0x1 << 1)
>> +#define EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND (0x1 << 0)
>> +
>> +/* Isolation, configured in the power management unit */
>> +#define EXYNOS_5250_USB_ISOL_OTG_OFFSET 0x0
>> +#define EXYNOS_5250_USB_ISOL_OTG (1 << 0)
>> +#define EXYNOS_5250_USB_ISOL_HOST_OFFSET 0x4
>> +#define EXYNOS_5250_USB_ISOL_HOST (1 << 0)
>> +
>> +enum exynos4x12_phy_id {
>> + EXYNOS5250_DEVICE,
>> + EXYNOS5250_HOST,
>> + EXYNOS5250_HSIC0,
>> + EXYNOS5250_HSIC1,
>> + EXYNOS5250_NUM_PHYS,
>> +};
>> +
>> +/* exynos5250_rate_to_clk() converts the supplied clock rate to the value that
>> + * can be written to the phy register. */
>
> Follow coding guidelines ;-)
>> +static u32 exynos5250_rate_to_clk(unsigned long rate)
>> +{
>> + unsigned int clksel;
>> +
>> + /* EXYNOS_5250_FSEL_MASK */
>> +
>> + switch (rate) {
>> + case 9600 * KHZ:
>> + clksel = EXYNOS_5250_FSEL_9MHZ6;
>> + break;
>> + case 10 * MHZ:
>> + clksel = EXYNOS_5250_FSEL_10MHZ;
>> + break;
>> + case 12 * MHZ:
>> + clksel = EXYNOS_5250_FSEL_12MHZ;
>> + break;
>> + case 19200 * KHZ:
>> + clksel = EXYNOS_5250_FSEL_19MHZ2;
>> + break;
>> + case 20 * MHZ:
>> + clksel = EXYNOS_5250_FSEL_20MHZ;
>> + break;
>> + case 24 * MHZ:
>> + clksel = EXYNOS_5250_FSEL_24MHZ;
>> + break;
>> + case 50 * MHZ:
>> + clksel = EXYNOS_5250_FSEL_50MHZ;
>> + break;
>> + default:
>> + clksel = CLKSEL_ERROR;
>> + }
>> +
>> + return clksel;
>> +}
>> +
>> +static void exynos5250_isol(struct uphy_instance *inst, bool on)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> + u32 offset;
>> + u32 mask;
>> + u32 tmp;
>> +
>> + if (!drv->reg_isol)
>> + return;
>> +
>> + switch (inst->cfg->id) {
>> + case EXYNOS5250_DEVICE:
>> + offset = EXYNOS_5250_USB_ISOL_OTG_OFFSET;
>> + mask = EXYNOS_5250_USB_ISOL_OTG;
>> + break;
>> + case EXYNOS5250_HOST:
>> + offset = EXYNOS_5250_USB_ISOL_HOST_OFFSET;
>> + mask = EXYNOS_5250_USB_ISOL_HOST;
>> + break;
>> + default:
>> + return;
>> + };
>> +
>> + tmp = readl(drv->reg_isol + offset);
>> + if (on)
>> + tmp &= ~mask;
>> + else
>> + tmp |= mask;
>> + writel(tmp, drv->reg_isol + offset);
>> +}
>> +
>> +static void exynos5250_phy_pwr(struct uphy_instance *inst, bool on)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> + u32 ctrl0;
>> + u32 otg;
>> + u32 ehci;
>> + u32 ohci;
>> +
>> + switch (inst->cfg->id) {
>> + case EXYNOS5250_DEVICE:
>> + writel(0, drv->reg_mode);
>> +
>> + /* OTG configuration */
>> + otg = readl(drv->reg_phy + EXYNOS_5250_USBOTGSYS);
>> + /* The clock */
>> + otg &= ~EXYNOS_5250_USBOTGSYS_FSEL_MASK;
>> + otg |= inst->clk << EXYNOS_5250_USBOTGSYS_FSEL_SHIFT;
>> + /* Reset */
>> + otg &= ~(EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND |
>> + EXYNOS_5250_USBOTGSYS_FORCE_SLEEP |
>> + EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG);
>> + /* TODO: Clear 4 bits as the old driver does. */
>> + otg |= EXYNOS_5250_USBOTGSYS_PHY_SW_RST |
>> + EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET |
>> + EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG |
>> + EXYNOS_5250_USBOTGSYS_OTGDISABLE;
>> + /* Ref clock */
>> + otg &= EXYNOS_5250_USBOTGSYS_REFCLKSEL_MASK;
>> + otg |= EXYNOS_5250_REFCLKSEL_CLKCORE <<
>> + EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT;
>> + writel(otg, drv->reg_phy + EXYNOS_5250_USBOTGSYS);
>> + udelay(10);
>> + otg &= ~(EXYNOS_5250_USBOTGSYS_PHY_SW_RST |
>> + EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG |
>> + EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET);
>> +
>> +
>> + break;
>> + case EXYNOS5250_HOST:
>> + /* Host registers configuration */
>> + ctrl0 = readl(drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
>> + /* The clock */
>> + ctrl0 &= ~EXYNOS_5250_HOSTPHYCTRL0_FSEL_MASK;
>> + ctrl0 |= inst->clk << EXYNOS_5250_HOSTPHYCTRL0_FSEL_SHIFT;
>> +
>> + /* Reset */
>> + ctrl0 &= ~( EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST |
>> + EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL |
>> + EXYNOS_5250_HOSTPHYCTRL0_SIDDQ |
>> + EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND |
>> + EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP);
>> + ctrl0 |= EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST |
>> + EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST |
>> + EXYNOS_5250_HOSTPHYCTRL0_COMMON_ON_N;
>> + writel(ctrl0, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
>> + udelay(10);
>> + ctrl0 &= ~( EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST |
>> + EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST);
>> + writel(ctrl0, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
>> +
>> + /* OTG configuration */
>> + otg = readl(drv->reg_phy + EXYNOS_5250_USBOTGSYS);
>> + /* The clock */
>> + otg &= ~EXYNOS_5250_USBOTGSYS_FSEL_MASK;
>> + otg |= inst->clk << EXYNOS_5250_USBOTGSYS_FSEL_SHIFT;
>> + /* Reset */
>> + otg &= ~(EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND |
>> + EXYNOS_5250_USBOTGSYS_FORCE_SLEEP |
>> + EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG);
>> + /* TODO: Clear 4 bits as the old driver does. */
>> + otg |= EXYNOS_5250_USBOTGSYS_PHY_SW_RST |
>> + EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET |
>> + EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG |
>> + EXYNOS_5250_USBOTGSYS_OTGDISABLE;
>> + /* Ref clock */
>> + otg &= EXYNOS_5250_USBOTGSYS_REFCLKSEL_MASK;
>> + otg |= EXYNOS_5250_REFCLKSEL_CLKCORE <<
>> + EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT;
>> + writel(otg, drv->reg_phy + EXYNOS_5250_USBOTGSYS);
>> + udelay(10);
>> + otg &= ~(EXYNOS_5250_USBOTGSYS_PHY_SW_RST |
>> + EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG |
>> + EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET);
>> +
>> + /* Enable EHCI DMA burst */
>> + ehci = readl(drv->reg_phy + EXYNOS_5250_HOSTEHCICTRL);
>> + ehci |= EXYNOS_5250_HOSTEHCICTRL_ENAINCRXALIGN |
>> + EXYNOS_5250_HOSTEHCICTRL_ENAINCR4 |
>> + EXYNOS_5250_HOSTEHCICTRL_ENAINCR8 |
>> + EXYNOS_5250_HOSTEHCICTRL_ENAINCR16;
>> + writel(ehci, drv->reg_phy + EXYNOS_5250_HOSTEHCICTRL);
>> +
>> + /* OHCI settings */
>> + ohci = readl(drv->reg_phy + EXYNOS_5250_HOSTOHCICTRL);
>> + /* Let's do some undocumented magic (based on the old driver) */
>> + ohci |= 0x1 << 3;
>> + writel(ohci, drv->reg_phy + EXYNOS_5250_HOSTOHCICTRL);
>> +
>> + break;
>> + }
>> +}
>> +
>> +static int exynos5250_power_on(struct uphy_instance *inst)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> +
>> + if (inst->state == STATE_ON) {
>> + dev_err(drv->dev, "usb phy \"%s\" already on",
>> + inst->cfg->label);
>> + return -ENODEV;
>> + }
>> +
>> + inst->state = STATE_ON;
>> + inst->ref_cnt++;
>> + if (inst->ref_cnt > 1)
>> + return 0;
>> +
>> + exynos5250_phy_pwr(inst, 1);
>> + exynos5250_isol(inst, 0);
>> +
>> + /* Power on the device, as it is necessary for HSIC to work */
>> + if (inst->cfg->id == EXYNOS5250_HSIC0) {
>> + struct uphy_instance *device =
>> + &drv->uphy_instances[EXYNOS5250_DEVICE];
>> + device->ref_cnt++;
>> + if (device->ref_cnt > 1)
>> + return 0;
>> + exynos5250_phy_pwr(device, 1);
>> + exynos5250_isol(device, 0);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int exynos5250_power_off(struct uphy_instance *inst)
>> +{
>> + struct uphy_driver *drv = inst->drv;
>> +
>> + if (inst->state == STATE_OFF) {
>> + dev_err(drv->dev, "usb phy \"%s\" already off",
>> + inst->cfg->label);
>> + return -EINVAL;
>> + }
>> +
>> + inst->state = STATE_OFF;
>> + inst->ref_cnt--;
>> +
>> + if (inst->ref_cnt > 0)
>> + return 0;
>> +
>> + exynos5250_isol(inst, 1);
>> + exynos5250_phy_pwr(inst, 0);
>> +
>> + if (inst->cfg->id == EXYNOS5250_HSIC0) {
>> + struct uphy_instance *device =
>> + &drv->uphy_instances[EXYNOS5250_DEVICE];
>> + device->ref_cnt--;
>> + if (device->ref_cnt > 0)
>> + return 0;
>> + exynos5250_isol(device, 1);
>> + exynos5250_phy_pwr(device, 0);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +
>> +static const struct common_phy exynos5250_phys[] = {
>> + {
>> + .label = "device",
>> + .type = PHY_DEVICE,
>> + .id = EXYNOS5250_DEVICE,
>> + .rate_to_clk = exynos5250_rate_to_clk,
>> + .power_on = exynos5250_power_on,
>> + .power_off = exynos5250_power_off,
>> + },
>> + {
>> + .label = "host",
>> + .type = PHY_HOST,
>> + .id = EXYNOS5250_HOST,
>> + .rate_to_clk = exynos5250_rate_to_clk,
>> + .power_on = exynos5250_power_on,
>> + .power_off = exynos5250_power_off,
>> + },
>> + {
>> + .label = "hsic0",
>> + .type = PHY_HOST,
>> + .id = EXYNOS5250_HSIC0,
>> + .rate_to_clk = exynos5250_rate_to_clk,
>> + .power_on = exynos5250_power_on,
>> + .power_off = exynos5250_power_off,
>> + },
>> + {
>> + .label = "hsic1",
>> + .type = PHY_HOST,
>> + .id = EXYNOS5250_HSIC1,
>> + .rate_to_clk = exynos5250_rate_to_clk,
>> + .power_on = exynos5250_power_on,
>> + .power_off = exynos5250_power_off,
>> + },
>> + {},
>> +};
>
> All this can be removed if you don't use exynos common PHY.
>
> Thanks
> Kishon
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--
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India


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