/*
* Samsung SoC USB 1.1/2.0 PHY driver - Exynos 5250 support
*
* 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/delay.h>
#include <linux/io.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include "phy-samsung-usb2.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 BIT(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 BIT(11)
#define EXYNOS_5250_HOSTPHYCTRL0_RETENABLE BIT(10)
#define EXYNOS_5250_HOSTPHYCTRL0_COMMON_ON_N BIT(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 BIT(6)
#define EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP BIT(5)
#define EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND BIT(4)
#define EXYNOS_5250_HOSTPHYCTRL0_WORDINTERFACE BIT(3)
#define EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST BIT(2)
#define EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST BIT(1)
#define EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST BIT(0)
/* HSIC0 & HSIC1 */
#define EXYNOS_5250_HSICPHYCTRL1 0x10
#define EXYNOS_5250_HSICPHYCTRL2 0x20
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_MASK (0x3 << 23)
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT (0x2 << 23)
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_MASK (0x7f << 16)
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12 (0x24 << 16)
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_15 (0x1c << 16)
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_16 (0x1a << 16)
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_19_2 (0x15 << 16)
#define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_20 (0x14 << 16)
#define EXYNOS_5250_HSICPHYCTRLX_SIDDQ BIT(6)
#define EXYNOS_5250_HSICPHYCTRLX_FORCESLEEP BIT(5)
#define EXYNOS_5250_HSICPHYCTRLX_FORCESUSPEND BIT(4)
#define EXYNOS_5250_HSICPHYCTRLX_WORDINTERFACE BIT(3)
#define EXYNOS_5250_HSICPHYCTRLX_UTMISWRST BIT(2)
#define EXYNOS_5250_HSICPHYCTRLX_PHYSWRST BIT(0)
/* EHCI control */
#define EXYNOS_5250_HOSTEHCICTRL 0x30
#define EXYNOS_5250_HOSTEHCICTRL_ENAINCRXALIGN BIT(29)
#define EXYNOS_5250_HOSTEHCICTRL_ENAINCR4 BIT(28)
#define EXYNOS_5250_HOSTEHCICTRL_ENAINCR8 BIT(27)
#define EXYNOS_5250_HOSTEHCICTRL_ENAINCR16 BIT(26)
#define EXYNOS_5250_HOSTEHCICTRL_AUTOPPDONOVRCUREN BIT(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 BIT(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 BIT(0)
/* USBOTG */
#define EXYNOS_5250_USBOTGSYS 0x38
#define EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET BIT(14)
#define EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG BIT(13)
#define EXYNOS_5250_USBOTGSYS_PHY_SW_RST BIT(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 BIT(8)
#define EXYNOS_5250_USBOTGSYS_COMMON_ON BIT(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 BIT(3)
#define EXYNOS_5250_USBOTGSYS_OTGDISABLE BIT(2)
#define EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG BIT(1)
#define EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND BIT(0)
/* Isolation, configured in the power management unit */
#define EXYNOS_5250_USB_ISOL_OTG_OFFSET 0x704
#define EXYNOS_5250_USB_ISOL_OTG BIT(0)
#define EXYNOS_5250_USB_ISOL_HOST_OFFSET 0x708
#define EXYNOS_5250_USB_ISOL_HOST BIT(0)
/* Mode swtich register */
#define EXYNOS_5250_MODE_SWITCH_OFFSET 0x230
#define EXYNOS_5250_MODE_SWITCH_MASK 1
#define EXYNOS_5250_MODE_SWITCH_DEVICE 0
#define EXYNOS_5250_MODE_SWITCH_HOST 1
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.
*/
static int exynos5250_rate_to_clk(unsigned long rate, u32 *reg)
{
/* EXYNOS_5250_FSEL_MASK */
switch (rate) {
case 9600 * KHZ:
*reg = EXYNOS_5250_FSEL_9MHZ6;
break;
case 10 * MHZ:
*reg = EXYNOS_5250_FSEL_10MHZ;
break;
case 12 * MHZ:
*reg = EXYNOS_5250_FSEL_12MHZ;
break;
case 19200 * KHZ:
*reg = EXYNOS_5250_FSEL_19MHZ2;
break;
case 20 * MHZ:
*reg = EXYNOS_5250_FSEL_20MHZ;
break;
case 24 * MHZ:
*reg = EXYNOS_5250_FSEL_24MHZ;
break;
case 50 * MHZ:
*reg = EXYNOS_5250_FSEL_50MHZ;
break;
default:
return -EINVAL;
}
return 0;
}
static void exynos5250_isol(struct samsung_usb2_phy_instance *inst, bool on)
{
struct samsung_usb2_phy_driver *drv = inst->drv;
u32 offset;
u32 mask;
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;
};
regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask);
}
static int exynos5250_power_on(struct samsung_usb2_phy_instance *inst)
{
struct samsung_usb2_phy_driver *drv = inst->drv;
u32 ctrl0;
u32 otg;
u32 ehci;
u32 ohci;
u32 hsic;
switch (inst->cfg->id) {
case EXYNOS5250_DEVICE:
regmap_update_bits(drv->reg_sys,
EXYNOS_5250_MODE_SWITCH_OFFSET,
EXYNOS_5250_MODE_SWITCH_MASK,
EXYNOS_5250_MODE_SWITCH_DEVICE);
/* OTG configuration */
otg = readl(drv->reg_phy + EXYNOS_5250_USBOTGSYS);
/* The clock */
otg &= ~EXYNOS_5250_USBOTGSYS_FSEL_MASK;
otg |= drv->ref_reg_val << EXYNOS_5250_USBOTGSYS_FSEL_SHIFT;
/* Reset */
otg &= ~(EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND |
EXYNOS_5250_USBOTGSYS_FORCE_SLEEP |
EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG);
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(100);
otg &= ~(EXYNOS_5250_USBOTGSYS_PHY_SW_RST |
EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG |
EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET |
EXYNOS_5250_USBOTGSYS_OTGDISABLE);
writel(otg, drv->reg_phy + EXYNOS_5250_USBOTGSYS);
break;
case EXYNOS5250_HOST:
case EXYNOS5250_HSIC0:
case EXYNOS5250_HSIC1:
/* Host registers configuration */
ctrl0 = readl(drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
/* The clock */
ctrl0 &= ~EXYNOS_5250_HOSTPHYCTRL0_FSEL_MASK;
ctrl0 |= drv->ref_reg_val <<
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 |= drv->ref_reg_val << EXYNOS_5250_USBOTGSYS_FSEL_SHIFT;
/* Reset */
otg &= ~(EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND |
EXYNOS_5250_USBOTGSYS_FORCE_SLEEP |
EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG);
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);
/* HSIC phy configuration */
hsic = (EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12 |
EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT |
EXYNOS_5250_HSICPHYCTRLX_PHYSWRST);
writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL1);
writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL2);
udelay(10);
hsic &= ~EXYNOS_5250_HSICPHYCTRLX_PHYSWRST;
writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL1);
writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL2);
/* The following delay is necessary for the reset sequence to be
* completed */
udelay(80);
/* 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);
/* Following code is based on the old driver */
ohci |= 0x1 << 3;
writel(ohci, drv->reg_phy + EXYNOS_5250_HOSTOHCICTRL);
break;
}
exynos5250_isol(inst, 0);
return 0;
}
static int exynos5250_power_off(struct samsung_usb2_phy_instance *inst)
{
struct samsung_usb2_phy_driver *drv = inst->drv;
u32 ctrl0;
u32 otg;
u32 hsic;
exynos5250_isol(inst, 1);
switch (inst->cfg->id) {
case EXYNOS5250_DEVICE:
otg = readl(drv->reg_phy + EXYNOS_5250_USBOTGSYS);
otg |= (EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND |
EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG |
EXYNOS_5250_USBOTGSYS_FORCE_SLEEP);
writel(otg, drv->reg_phy + EXYNOS_5250_USBOTGSYS);
break;
case EXYNOS5250_HOST:
ctrl0 = readl(drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
ctrl0 |= (EXYNOS_5250_HOSTPHYCTRL0_SIDDQ |
EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND |
EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP |
EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST |
EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL);
writel(ctrl0, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
break;
case EXYNOS5250_HSIC0:
case EXYNOS5250_HSIC1:
hsic = (EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12 |
EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT |
EXYNOS_5250_HSICPHYCTRLX_SIDDQ |
EXYNOS_5250_HSICPHYCTRLX_FORCESLEEP |
EXYNOS_5250_HSICPHYCTRLX_FORCESUSPEND
);
writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL1);
writel(hsic, drv->reg_phy + EXYNOS_5250_HSICPHYCTRL2);
break;
}
return 0;
}
static const struct samsung_usb2_common_phy exynos5250_phys[] = {
{
.label = "device",
.id = EXYNOS5250_DEVICE,
.power_on = exynos5250_power_on,
.power_off = exynos5250_power_off,
},
{
.label = "host",
.id = EXYNOS5250_HOST,
.power_on = exynos5250_power_on,
.power_off = exynos5250_power_off,
},
{
.label = "hsic0",
.id = EXYNOS5250_HSIC0,
.power_on = exynos5250_power_on,
.power_off = exynos5250_power_off,
},
{
.label = "hsic1",
.id = EXYNOS5250_HSIC1,
.power_on = exynos5250_power_on,
.power_off = exynos5250_power_off,
},
};
const struct samsung_usb2_phy_config exynos5250_usb2_phy_config = {
.has_mode_switch = 1,
.num_phys = EXYNOS5250_NUM_PHYS,
.phys = exynos5250_phys,
.rate_to_clk = exynos5250_rate_to_clk,
};