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|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
* Copyright (C) 2010 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <log.h>
#include <usb.h>
#include <errno.h>
#include <wait_bit.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <usb/ehci-ci.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/sys_proto.h>
#include <dm.h>
#include <asm/mach-types.h>
#include <power/regulator.h>
#include <linux/usb/otg.h>
#include "ehci.h"
DECLARE_GLOBAL_DATA_PTR;
#define USB_OTGREGS_OFFSET 0x000
#define USB_H1REGS_OFFSET 0x200
#define USB_H2REGS_OFFSET 0x400
#define USB_H3REGS_OFFSET 0x600
#define USB_OTHERREGS_OFFSET 0x800
#define USB_H1_CTRL_OFFSET 0x04
#define USBPHY_CTRL 0x00000030
#define USBPHY_CTRL_SET 0x00000034
#define USBPHY_CTRL_CLR 0x00000038
#define USBPHY_CTRL_TOG 0x0000003c
#define USBPHY_PWD 0x00000000
#define USBPHY_CTRL_SFTRST 0x80000000
#define USBPHY_CTRL_CLKGATE 0x40000000
#define USBPHY_CTRL_ENUTMILEVEL3 0x00008000
#define USBPHY_CTRL_ENUTMILEVEL2 0x00004000
#define USBPHY_CTRL_OTG_ID 0x08000000
#define ANADIG_USB2_CHRG_DETECT_EN_B 0x00100000
#define ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B 0x00080000
#define ANADIG_USB2_PLL_480_CTRL_BYPASS 0x00010000
#define ANADIG_USB2_PLL_480_CTRL_ENABLE 0x00002000
#define ANADIG_USB2_PLL_480_CTRL_POWER 0x00001000
#define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040
#define USBNC_OFFSET 0x200
#define USBNC_PHY_STATUS_OFFSET 0x23C
#define USBNC_PHYSTATUS_ID_DIG (1 << 4) /* otg_id status */
#define USBNC_PHYCFG2_ACAENB (1 << 4) /* otg_id detection enable */
#define UCTRL_PWR_POL (1 << 9) /* OTG Polarity of Power Pin */
#define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */
#define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */
/* USBCMD */
#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */
#define UCMD_RESET (1 << 1) /* controller reset */
#if defined(CONFIG_MX6) || defined(CONFIG_MX7ULP)
static const unsigned phy_bases[] = {
USB_PHY0_BASE_ADDR,
#if defined(USB_PHY1_BASE_ADDR)
USB_PHY1_BASE_ADDR,
#endif
};
static void usb_internal_phy_clock_gate(int index, int on)
{
void __iomem *phy_reg;
if (index >= ARRAY_SIZE(phy_bases))
return;
phy_reg = (void __iomem *)phy_bases[index];
phy_reg += on ? USBPHY_CTRL_CLR : USBPHY_CTRL_SET;
writel(USBPHY_CTRL_CLKGATE, phy_reg);
}
static void usb_power_config(int index)
{
#if defined(CONFIG_MX7ULP)
struct usbphy_regs __iomem *usbphy =
(struct usbphy_regs __iomem *)USB_PHY0_BASE_ADDR;
if (index > 0)
return;
writel(ANADIG_USB2_CHRG_DETECT_EN_B |
ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B,
&usbphy->usb1_chrg_detect);
scg_enable_usb_pll(true);
#else
struct anatop_regs __iomem *anatop =
(struct anatop_regs __iomem *)ANATOP_BASE_ADDR;
void __iomem *chrg_detect;
void __iomem *pll_480_ctrl_clr;
void __iomem *pll_480_ctrl_set;
switch (index) {
case 0:
chrg_detect = &anatop->usb1_chrg_detect;
pll_480_ctrl_clr = &anatop->usb1_pll_480_ctrl_clr;
pll_480_ctrl_set = &anatop->usb1_pll_480_ctrl_set;
break;
case 1:
chrg_detect = &anatop->usb2_chrg_detect;
pll_480_ctrl_clr = &anatop->usb2_pll_480_ctrl_clr;
pll_480_ctrl_set = &anatop->usb2_pll_480_ctrl_set;
break;
default:
return;
}
/*
* Some phy and power's special controls
* 1. The external charger detector needs to be disabled
* or the signal at DP will be poor
* 2. The PLL's power and output to usb
* is totally controlled by IC, so the Software only needs
* to enable them at initializtion.
*/
writel(ANADIG_USB2_CHRG_DETECT_EN_B |
ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B,
chrg_detect);
writel(ANADIG_USB2_PLL_480_CTRL_BYPASS,
pll_480_ctrl_clr);
writel(ANADIG_USB2_PLL_480_CTRL_ENABLE |
ANADIG_USB2_PLL_480_CTRL_POWER |
ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS,
pll_480_ctrl_set);
#endif
}
/* Return 0 : host node, <>0 : device mode */
static int usb_phy_enable(int index, struct usb_ehci *ehci)
{
void __iomem *phy_reg;
void __iomem *phy_ctrl;
void __iomem *usb_cmd;
int ret;
if (index >= ARRAY_SIZE(phy_bases))
return 0;
phy_reg = (void __iomem *)phy_bases[index];
phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL);
usb_cmd = (void __iomem *)&ehci->usbcmd;
/* Stop then Reset */
clrbits_le32(usb_cmd, UCMD_RUN_STOP);
ret = wait_for_bit_le32(usb_cmd, UCMD_RUN_STOP, false, 10000, false);
if (ret)
return ret;
setbits_le32(usb_cmd, UCMD_RESET);
ret = wait_for_bit_le32(usb_cmd, UCMD_RESET, false, 10000, false);
if (ret)
return ret;
/* Reset USBPHY module */
setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST);
udelay(10);
/* Remove CLKGATE and SFTRST */
clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST);
udelay(10);
/* Power up the PHY */
writel(0, phy_reg + USBPHY_PWD);
/* enable FS/LS device */
setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 |
USBPHY_CTRL_ENUTMILEVEL3);
return 0;
}
int usb_phy_mode(int port)
{
void __iomem *phy_reg;
void __iomem *phy_ctrl;
u32 val;
phy_reg = (void __iomem *)phy_bases[port];
phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL);
val = readl(phy_ctrl);
if (val & USBPHY_CTRL_OTG_ID)
return USB_INIT_DEVICE;
else
return USB_INIT_HOST;
}
#if defined(CONFIG_MX7ULP)
struct usbnc_regs {
u32 ctrl1;
u32 ctrl2;
u32 reserve0[2];
u32 hsic_ctrl;
};
#else
/* Base address for this IP block is 0x02184800 */
struct usbnc_regs {
u32 ctrl[4]; /* otg/host1-3 */
u32 uh2_hsic_ctrl;
u32 uh3_hsic_ctrl;
u32 otg_phy_ctrl_0;
u32 uh1_phy_ctrl_0;
};
#endif
#elif defined(CONFIG_MX7)
struct usbnc_regs {
u32 ctrl1;
u32 ctrl2;
u32 reserve1[10];
u32 phy_cfg1;
u32 phy_cfg2;
u32 reserve2;
u32 phy_status;
u32 reserve3[4];
u32 adp_cfg1;
u32 adp_cfg2;
u32 adp_status;
};
static void usb_power_config(int index)
{
struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
(0x10000 * index) + USBNC_OFFSET);
void __iomem *phy_cfg2 = (void __iomem *)(&usbnc->phy_cfg2);
/*
* Clear the ACAENB to enable usb_otg_id detection,
* otherwise it is the ACA detection enabled.
*/
clrbits_le32(phy_cfg2, USBNC_PHYCFG2_ACAENB);
}
int usb_phy_mode(int port)
{
struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
(0x10000 * port) + USBNC_OFFSET);
void __iomem *status = (void __iomem *)(&usbnc->phy_status);
u32 val;
val = readl(status);
if (val & USBNC_PHYSTATUS_ID_DIG)
return USB_INIT_DEVICE;
else
return USB_INIT_HOST;
}
#endif
static void usb_oc_config(int index)
{
#if defined(CONFIG_MX6)
struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
USB_OTHERREGS_OFFSET);
void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl[index]);
#elif defined(CONFIG_MX7) || defined(CONFIG_MX7ULP)
struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
(0x10000 * index) + USBNC_OFFSET);
void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl1);
#endif
#if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2
/* mx6qarm2 seems to required a different setting*/
clrbits_le32(ctrl, UCTRL_OVER_CUR_POL);
#else
setbits_le32(ctrl, UCTRL_OVER_CUR_POL);
#endif
setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);
/* Set power polarity to high active */
#ifdef CONFIG_MXC_USB_OTG_HACTIVE
setbits_le32(ctrl, UCTRL_PWR_POL);
#else
clrbits_le32(ctrl, UCTRL_PWR_POL);
#endif
}
/**
* board_usb_phy_mode - override usb phy mode
* @port: usb host/otg port
*
* Target board specific, override usb_phy_mode.
* When usb-otg is used as usb host port, iomux pad usb_otg_id can be
* left disconnected in this case usb_phy_mode will not be able to identify
* the phy mode that usb port is used.
* Machine file overrides board_usb_phy_mode.
*
* Return: USB_INIT_DEVICE or USB_INIT_HOST
*/
int __weak board_usb_phy_mode(int port)
{
return usb_phy_mode(port);
}
/**
* board_ehci_hcd_init - set usb vbus voltage
* @port: usb otg port
*
* Target board specific, setup iomux pad to setup supply vbus voltage
* for usb otg port. Machine board file overrides board_ehci_hcd_init
*
* Return: 0 Success
*/
int __weak board_ehci_hcd_init(int port)
{
return 0;
}
/**
* board_ehci_power - enables/disables usb vbus voltage
* @port: usb otg port
* @on: on/off vbus voltage
*
* Enables/disables supply vbus voltage for usb otg port.
* Machine board file overrides board_ehci_power
*
* Return: 0 Success
*/
int __weak board_ehci_power(int port, int on)
{
return 0;
}
int ehci_mx6_common_init(struct usb_ehci *ehci, int index)
{
int ret;
enable_usboh3_clk(1);
mdelay(1);
/* Do board specific initialization */
ret = board_ehci_hcd_init(index);
if (ret)
return ret;
usb_power_config(index);
usb_oc_config(index);
#if defined(CONFIG_MX6) || defined(CONFIG_MX7ULP)
usb_internal_phy_clock_gate(index, 1);
usb_phy_enable(index, ehci);
#endif
return 0;
}
#if !CONFIG_IS_ENABLED(DM_USB)
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
enum usb_init_type type;
#if defined(CONFIG_MX6)
u32 controller_spacing = 0x200;
#elif defined(CONFIG_MX7) || defined(CONFIG_MX7ULP)
u32 controller_spacing = 0x10000;
#endif
struct usb_ehci *ehci = (struct usb_ehci *)(USB_BASE_ADDR +
(controller_spacing * index));
int ret;
if (index > 3)
return -EINVAL;
if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
if (usb_fused((ulong)ehci)) {
printf("SoC fuse indicates USB@0x%lx is unavailable.\n",
(ulong)ehci);
return -ENODEV;
}
}
ret = ehci_mx6_common_init(ehci, index);
if (ret)
return ret;
type = board_usb_phy_mode(index);
if (hccr && hcor) {
*hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
*hcor = (struct ehci_hcor *)((uint32_t)*hccr +
HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
}
if ((type == init) || (type == USB_INIT_DEVICE))
board_ehci_power(index, (type == USB_INIT_DEVICE) ? 0 : 1);
if (type != init)
return -ENODEV;
if (type == USB_INIT_DEVICE)
return 0;
setbits_le32(&ehci->usbmode, CM_HOST);
writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
setbits_le32(&ehci->portsc, USB_EN);
mdelay(10);
return 0;
}
int ehci_hcd_stop(int index)
{
return 0;
}
#else
struct ehci_mx6_priv_data {
struct ehci_ctrl ctrl;
struct usb_ehci *ehci;
struct udevice *vbus_supply;
enum usb_init_type init_type;
int portnr;
};
static int mx6_init_after_reset(struct ehci_ctrl *dev)
{
struct ehci_mx6_priv_data *priv = dev->priv;
enum usb_init_type type = priv->init_type;
struct usb_ehci *ehci = priv->ehci;
int ret;
ret = ehci_mx6_common_init(priv->ehci, priv->portnr);
if (ret)
return ret;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (priv->vbus_supply) {
ret = regulator_set_enable(priv->vbus_supply,
(type == USB_INIT_DEVICE) ?
false : true);
if (ret && ret != -ENOSYS) {
printf("Error enabling VBUS supply (ret=%i)\n", ret);
return ret;
}
}
#endif
if (type == USB_INIT_DEVICE)
return 0;
setbits_le32(&ehci->usbmode, CM_HOST);
writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
setbits_le32(&ehci->portsc, USB_EN);
mdelay(10);
return 0;
}
static const struct ehci_ops mx6_ehci_ops = {
.init_after_reset = mx6_init_after_reset
};
static int ehci_usb_phy_mode(struct udevice *dev)
{
struct usb_plat *plat = dev_get_plat(dev);
void *__iomem addr = dev_read_addr_ptr(dev);
void *__iomem phy_ctrl, *__iomem phy_status;
const void *blob = gd->fdt_blob;
int offset = dev_of_offset(dev), phy_off;
u32 val;
/*
* About fsl,usbphy, Refer to
* Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt.
*/
if (is_mx6() || is_mx7ulp()) {
phy_off = fdtdec_lookup_phandle(blob,
offset,
"fsl,usbphy");
if (phy_off < 0)
return -EINVAL;
addr = (void __iomem *)fdtdec_get_addr(blob, phy_off,
"reg");
if ((fdt_addr_t)addr == FDT_ADDR_T_NONE)
return -EINVAL;
phy_ctrl = (void __iomem *)(addr + USBPHY_CTRL);
val = readl(phy_ctrl);
if (val & USBPHY_CTRL_OTG_ID)
plat->init_type = USB_INIT_DEVICE;
else
plat->init_type = USB_INIT_HOST;
} else if (is_mx7()) {
phy_status = (void __iomem *)(addr +
USBNC_PHY_STATUS_OFFSET);
val = readl(phy_status);
if (val & USBNC_PHYSTATUS_ID_DIG)
plat->init_type = USB_INIT_DEVICE;
else
plat->init_type = USB_INIT_HOST;
} else {
return -EINVAL;
}
return 0;
}
static int ehci_usb_of_to_plat(struct udevice *dev)
{
struct usb_plat *plat = dev_get_plat(dev);
enum usb_dr_mode dr_mode;
dr_mode = usb_get_dr_mode(dev->node);
switch (dr_mode) {
case USB_DR_MODE_HOST:
plat->init_type = USB_INIT_HOST;
break;
case USB_DR_MODE_PERIPHERAL:
plat->init_type = USB_INIT_DEVICE;
break;
case USB_DR_MODE_OTG:
case USB_DR_MODE_UNKNOWN:
return ehci_usb_phy_mode(dev);
};
return 0;
}
static int ehci_usb_bind(struct udevice *dev)
{
/*
* TODO:
* This driver is only partly converted to DT probing and still uses
* a tremendous amount of hard-coded addresses. To make things worse,
* the driver depends on specific sequential indexing of controllers,
* from which it derives offsets in the PHY and ANATOP register sets.
*
* Here we attempt to calculate these indexes from DT information as
* well as we can. The USB controllers on all existing iMX6 SoCs
* are placed next to each other, at addresses incremented by 0x200,
* and iMX7 their addresses are shifted by 0x10000.
* Thus, the index is derived from the multiple of 0x200 (0x10000 for
* iMX7) offset from the first controller address.
*
* However, to complete conversion of this driver to DT probing, the
* following has to be done:
* - DM clock framework support for iMX must be implemented
* - usb_power_config() has to be converted to clock framework
* -> Thus, the ad-hoc "index" variable goes away.
* - USB PHY handling has to be factored out into separate driver
* -> Thus, the ad-hoc "index" variable goes away from the PHY
* code, the PHY driver must parse it's address from DT. This
* USB driver must find the PHY driver via DT phandle.
* -> usb_power_config() shall be moved to PHY driver
* With these changes in place, the ad-hoc indexing goes away and
* the driver is fully converted to DT probing.
*/
u32 controller_spacing = is_mx7() ? 0x10000 : 0x200;
fdt_addr_t addr = devfdt_get_addr_index(dev, 0);
dev->req_seq = (addr - USB_BASE_ADDR) / controller_spacing;
return 0;
}
static int ehci_usb_probe(struct udevice *dev)
{
struct usb_plat *plat = dev_get_plat(dev);
struct usb_ehci *ehci = dev_read_addr_ptr(dev);
struct ehci_mx6_priv_data *priv = dev_get_priv(dev);
enum usb_init_type type = plat->init_type;
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
int ret;
if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
if (usb_fused((ulong)ehci)) {
printf("SoC fuse indicates USB@0x%lx is unavailable.\n",
(ulong)ehci);
return -ENODEV;
}
}
priv->ehci = ehci;
priv->portnr = dev_seq(dev);
priv->init_type = type;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
ret = device_get_supply_regulator(dev, "vbus-supply",
&priv->vbus_supply);
if (ret)
debug("%s: No vbus supply\n", dev->name);
#endif
ret = ehci_mx6_common_init(ehci, priv->portnr);
if (ret)
return ret;
#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (priv->vbus_supply) {
ret = regulator_set_enable(priv->vbus_supply,
(type == USB_INIT_DEVICE) ?
false : true);
if (ret && ret != -ENOSYS) {
printf("Error enabling VBUS supply (ret=%i)\n", ret);
return ret;
}
}
#endif
if (priv->init_type == USB_INIT_HOST) {
setbits_le32(&ehci->usbmode, CM_HOST);
writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
setbits_le32(&ehci->portsc, USB_EN);
}
mdelay(10);
hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
hcor = (struct ehci_hcor *)((uint32_t)hccr +
HC_LENGTH(ehci_readl(&(hccr)->cr_capbase)));
return ehci_register(dev, hccr, hcor, &mx6_ehci_ops, 0, priv->init_type);
}
static const struct udevice_id mx6_usb_ids[] = {
{ .compatible = "fsl,imx27-usb" },
{ }
};
U_BOOT_DRIVER(usb_mx6) = {
.name = "ehci_mx6",
.id = UCLASS_USB,
.of_match = mx6_usb_ids,
.of_to_plat = ehci_usb_of_to_plat,
.bind = ehci_usb_bind,
.probe = ehci_usb_probe,
.remove = ehci_deregister,
.ops = &ehci_usb_ops,
.plat_auto = sizeof(struct usb_plat),
.priv_auto = sizeof(struct ehci_mx6_priv_data),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
#endif
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