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/*
* Copyright (c) 2012 Sascha Hauer <s.hauer@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* 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.
*/
#include <common.h>
#include <init.h>
#include <io.h>
#include <of.h>
#include <errno.h>
#include <driver.h>
#include <usb/usb.h>
#include <usb/ehci.h>
#include <usb/chipidea-imx.h>
#include <usb/ulpi.h>
#include <usb/fsl_usb2.h>
#define MXC_EHCI_PORTSC_MASK ((0xf << 28) | (1 << 25))
struct imx_chipidea {
struct device_d *dev;
void __iomem *base;
struct ehci_data data;
unsigned long flags;
enum imx_usb_mode mode;
int portno;
enum usb_phy_interface phymode;
};
static int imx_chipidea_port_init(void *drvdata)
{
struct imx_chipidea *ci = drvdata;
int ret;
if ((ci->flags & MXC_EHCI_PORTSC_MASK) == MXC_EHCI_MODE_ULPI) {
dev_dbg(ci->dev, "using ULPI phy\n");
if (IS_ENABLED(CONFIG_USB_ULPI)) {
ret = ulpi_setup(ci->base + 0x170, 1);
if (ret)
dev_err(ci->dev, "ULPI setup failed with %s\n",
strerror(-ret));
mdelay(20);
} else {
dev_err(ci->dev, "no ULPI support available\n");
ret = -ENODEV;
}
if (ret)
return ret;
}
ret = imx_usbmisc_port_init(ci->portno, ci->flags);
if (ret)
dev_err(ci->dev, "misc init failed: %s\n", strerror(-ret));
return ret;
}
static int imx_chipidea_port_post_init(void *drvdata)
{
struct imx_chipidea *ci = drvdata;
int ret;
ret = imx_usbmisc_port_post_init(ci->portno, ci->flags);
if (ret)
dev_err(ci->dev, "post misc init failed: %s\n", strerror(-ret));
return ret;
}
static int imx_chipidea_probe_dt(struct imx_chipidea *ci)
{
struct of_phandle_args out_args;
enum usb_dr_mode mode;
if (of_parse_phandle_with_args(ci->dev->device_node, "fsl,usbmisc",
"#index-cells", 0, &out_args))
return -ENODEV;
ci->portno = out_args.args[0];
ci->flags = MXC_EHCI_MODE_UTMI_8BIT;
mode = of_usb_get_dr_mode(ci->dev->device_node, NULL);
switch (mode) {
case USB_DR_MODE_HOST:
default:
ci->mode = IMX_USB_MODE_HOST;
break;
case USB_DR_MODE_PERIPHERAL:
ci->mode = IMX_USB_MODE_DEVICE;
break;
}
ci->phymode = of_usb_get_phy_mode(ci->dev->device_node, NULL);
switch (ci->phymode) {
case USBPHY_INTERFACE_MODE_UTMI:
ci->flags = MXC_EHCI_MODE_UTMI_8BIT;
break;
case USBPHY_INTERFACE_MODE_UTMIW:
ci->flags = MXC_EHCI_MODE_UTMI_16_BIT;
break;
case USBPHY_INTERFACE_MODE_ULPI:
ci->flags = MXC_EHCI_MODE_ULPI;
break;
case USBPHY_INTERFACE_MODE_SERIAL:
ci->flags = MXC_EHCI_MODE_SERIAL;
break;
case USBPHY_INTERFACE_MODE_HSIC:
ci->flags = MXC_EHCI_MODE_HSIC;
break;
default:
dev_dbg(ci->dev, "no phy_type setting. Relying on reset default\n");
}
if (of_find_property(ci->dev->device_node,
"disable-over-current", NULL))
ci->flags |= MXC_EHCI_DISABLE_OVERCURRENT;
return 0;
}
static int imx_chipidea_probe(struct device_d *dev)
{
struct imxusb_platformdata *pdata = dev->platform_data;
int ret;
void __iomem *base;
struct imx_chipidea *ci;
uint32_t portsc;
ci = xzalloc(sizeof(*ci));
ci->dev = dev;
if (IS_ENABLED(CONFIG_OFDEVICE) && dev->device_node) {
ret = imx_chipidea_probe_dt(ci);
if (ret)
return ret;
} else {
if (!pdata) {
dev_err(dev, "no pdata!\n");
return -EINVAL;
}
ci->portno = dev->id;
ci->flags = pdata->flags;
ci->mode = pdata->mode;
}
base = dev_request_mem_region(dev, 0);
if (!base)
return -ENODEV;
ci->base = base;
ci->data.init = imx_chipidea_port_init;
ci->data.post_init = imx_chipidea_port_post_init;
ci->data.drvdata = ci;
if ((ci->flags & MXC_EHCI_PORTSC_MASK) == MXC_EHCI_MODE_HSIC)
imx_chipidea_port_init(ci);
if (ci->phymode != USBPHY_INTERFACE_MODE_UNKNOWN) {
portsc = readl(base + 0x184);
portsc &= ~MXC_EHCI_PORTSC_MASK;
portsc |= ci->flags & MXC_EHCI_PORTSC_MASK;
writel(portsc, base + 0x184);
}
ci->data.hccr = base + 0x100;
ci->data.hcor = base + 0x140;
ci->data.flags = EHCI_HAS_TT;
if (ci->mode == IMX_USB_MODE_HOST && IS_ENABLED(CONFIG_USB_EHCI)) {
ret = ehci_register(dev, &ci->data);
} else if (ci->mode == IMX_USB_MODE_DEVICE && IS_ENABLED(CONFIG_USB_GADGET_DRIVER_ARC)) {
ret = ci_udc_register(dev, base);
} else {
dev_err(dev, "No supported role\n");
ret = -ENODEV;
}
return ret;
};
static __maybe_unused struct of_device_id imx_chipidea_dt_ids[] = {
{
.compatible = "fsl,imx27-usb",
}, {
/* sentinel */
},
};
static struct driver_d imx_chipidea_driver = {
.name = "imx-usb",
.probe = imx_chipidea_probe,
.of_compatible = DRV_OF_COMPAT(imx_chipidea_dt_ids),
};
device_platform_driver(imx_chipidea_driver);
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