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// SPDX-License-Identifier: GPL-2.0+
/*
* Freescale QUICC Engine USB Host Controller Driver
*
* Copyright (c) Freescale Semicondutor, Inc. 2006.
* Shlomi Gridish <gridish@freescale.com>
* Jerry Huang <Chang-Ming.Huang@freescale.com>
* Copyright (c) Logic Product Development, Inc. 2007
* Peter Barada <peterb@logicpd.com>
* Copyright (c) MontaVista Software, Inc. 2008.
* Anton Vorontsov <avorontsov@ru.mvista.com>
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/gpio/consumer.h>
#include <soc/fsl/qe/qe.h>
#include "fhci.h"
/* virtual root hub specific descriptor */
static u8 root_hub_des[] = {
0x09, /* blength */
USB_DT_HUB, /* bDescriptorType;hub-descriptor */
0x01, /* bNbrPorts */
HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM, /* wHubCharacteristics */
0x00, /* per-port power, no overcurrent */
0x01, /* bPwrOn2pwrGood;2ms */
0x00, /* bHubContrCurrent;0mA */
0x00, /* DeviceRemoveable */
0xff, /* PortPwrCtrlMask */
};
static void fhci_gpio_set_value(struct fhci_hcd *fhci, int gpio_nr, bool on)
{
struct gpio_desc *gpiod = fhci->gpiods[gpio_nr];
if (!gpiod)
return;
gpiod_set_value(gpiod, on);
mdelay(5);
}
void fhci_config_transceiver(struct fhci_hcd *fhci,
enum fhci_port_status status)
{
fhci_dbg(fhci, "-> %s: %d\n", __func__, status);
switch (status) {
case FHCI_PORT_POWER_OFF:
fhci_gpio_set_value(fhci, GPIO_POWER, false);
break;
case FHCI_PORT_DISABLED:
case FHCI_PORT_WAITING:
fhci_gpio_set_value(fhci, GPIO_POWER, true);
break;
case FHCI_PORT_LOW:
fhci_gpio_set_value(fhci, GPIO_SPEED, false);
break;
case FHCI_PORT_FULL:
fhci_gpio_set_value(fhci, GPIO_SPEED, true);
break;
default:
WARN_ON(1);
break;
}
fhci_dbg(fhci, "<- %s: %d\n", __func__, status);
}
/* disable the USB port by clearing the EN bit in the USBMOD register */
void fhci_port_disable(struct fhci_hcd *fhci)
{
struct fhci_usb *usb = (struct fhci_usb *)fhci->usb_lld;
enum fhci_port_status port_status;
fhci_dbg(fhci, "-> %s\n", __func__);
fhci_stop_sof_timer(fhci);
fhci_flush_all_transmissions(usb);
fhci_usb_disable_interrupt((struct fhci_usb *)fhci->usb_lld);
port_status = usb->port_status;
usb->port_status = FHCI_PORT_DISABLED;
/* Enable IDLE since we want to know if something comes along */
usb->saved_msk |= USB_E_IDLE_MASK;
out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
/* check if during the disconnection process attached new device */
if (port_status == FHCI_PORT_WAITING)
fhci_device_connected_interrupt(fhci);
usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_ENABLE;
usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE;
fhci_usb_enable_interrupt((struct fhci_usb *)fhci->usb_lld);
fhci_dbg(fhci, "<- %s\n", __func__);
}
/* enable the USB port by setting the EN bit in the USBMOD register */
void fhci_port_enable(void *lld)
{
struct fhci_usb *usb = (struct fhci_usb *)lld;
struct fhci_hcd *fhci = usb->fhci;
fhci_dbg(fhci, "-> %s\n", __func__);
fhci_config_transceiver(fhci, usb->port_status);
if ((usb->port_status != FHCI_PORT_FULL) &&
(usb->port_status != FHCI_PORT_LOW))
fhci_start_sof_timer(fhci);
usb->vroot_hub->port.wPortStatus |= USB_PORT_STAT_ENABLE;
usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE;
fhci_dbg(fhci, "<- %s\n", __func__);
}
void fhci_io_port_generate_reset(struct fhci_hcd *fhci)
{
fhci_dbg(fhci, "-> %s\n", __func__);
gpiod_direction_output(fhci->gpiods[GPIO_USBOE], 0);
gpiod_direction_output(fhci->gpiods[GPIO_USBTP], 0);
gpiod_direction_output(fhci->gpiods[GPIO_USBTN], 0);
mdelay(5);
qe_pin_set_dedicated(fhci->pins[PIN_USBOE]);
qe_pin_set_dedicated(fhci->pins[PIN_USBTP]);
qe_pin_set_dedicated(fhci->pins[PIN_USBTN]);
fhci_dbg(fhci, "<- %s\n", __func__);
}
/* generate the RESET condition on the bus */
void fhci_port_reset(void *lld)
{
struct fhci_usb *usb = (struct fhci_usb *)lld;
struct fhci_hcd *fhci = usb->fhci;
u8 mode;
u16 mask;
fhci_dbg(fhci, "-> %s\n", __func__);
fhci_stop_sof_timer(fhci);
/* disable the USB controller */
mode = in_8(&fhci->regs->usb_usmod);
out_8(&fhci->regs->usb_usmod, mode & (~USB_MODE_EN));
/* disable idle interrupts */
mask = in_be16(&fhci->regs->usb_usbmr);
out_be16(&fhci->regs->usb_usbmr, mask & (~USB_E_IDLE_MASK));
fhci_io_port_generate_reset(fhci);
/* enable interrupt on this endpoint */
out_be16(&fhci->regs->usb_usbmr, mask);
/* enable the USB controller */
mode = in_8(&fhci->regs->usb_usmod);
out_8(&fhci->regs->usb_usmod, mode | USB_MODE_EN);
fhci_start_sof_timer(fhci);
fhci_dbg(fhci, "<- %s\n", __func__);
}
int fhci_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct fhci_hcd *fhci = hcd_to_fhci(hcd);
int ret = 0;
unsigned long flags;
fhci_dbg(fhci, "-> %s\n", __func__);
spin_lock_irqsave(&fhci->lock, flags);
if (fhci->vroot_hub->port.wPortChange & (USB_PORT_STAT_C_CONNECTION |
USB_PORT_STAT_C_ENABLE | USB_PORT_STAT_C_SUSPEND |
USB_PORT_STAT_C_RESET | USB_PORT_STAT_C_OVERCURRENT)) {
*buf = 1 << 1;
ret = 1;
fhci_dbg(fhci, "-- %s\n", __func__);
}
spin_unlock_irqrestore(&fhci->lock, flags);
fhci_dbg(fhci, "<- %s\n", __func__);
return ret;
}
int fhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct fhci_hcd *fhci = hcd_to_fhci(hcd);
int retval = 0;
struct usb_hub_status *hub_status;
struct usb_port_status *port_status;
unsigned long flags;
spin_lock_irqsave(&fhci->lock, flags);
fhci_dbg(fhci, "-> %s\n", __func__);
switch (typeReq) {
case ClearHubFeature:
switch (wValue) {
case C_HUB_LOCAL_POWER:
case C_HUB_OVER_CURRENT:
break;
default:
goto error;
}
break;
case ClearPortFeature:
fhci->vroot_hub->feature &= (1 << wValue);
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
fhci->vroot_hub->port.wPortStatus &=
~USB_PORT_STAT_ENABLE;
fhci_port_disable(fhci);
break;
case USB_PORT_FEAT_C_ENABLE:
fhci->vroot_hub->port.wPortChange &=
~USB_PORT_STAT_C_ENABLE;
break;
case USB_PORT_FEAT_SUSPEND:
fhci->vroot_hub->port.wPortStatus &=
~USB_PORT_STAT_SUSPEND;
fhci_stop_sof_timer(fhci);
break;
case USB_PORT_FEAT_C_SUSPEND:
fhci->vroot_hub->port.wPortChange &=
~USB_PORT_STAT_C_SUSPEND;
break;
case USB_PORT_FEAT_POWER:
fhci->vroot_hub->port.wPortStatus &=
~USB_PORT_STAT_POWER;
fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
break;
case USB_PORT_FEAT_C_CONNECTION:
fhci->vroot_hub->port.wPortChange &=
~USB_PORT_STAT_C_CONNECTION;
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
fhci->vroot_hub->port.wPortChange &=
~USB_PORT_STAT_C_OVERCURRENT;
break;
case USB_PORT_FEAT_C_RESET:
fhci->vroot_hub->port.wPortChange &=
~USB_PORT_STAT_C_RESET;
break;
default:
goto error;
}
break;
case GetHubDescriptor:
memcpy(buf, root_hub_des, sizeof(root_hub_des));
break;
case GetHubStatus:
hub_status = (struct usb_hub_status *)buf;
hub_status->wHubStatus =
cpu_to_le16(fhci->vroot_hub->hub.wHubStatus);
hub_status->wHubChange =
cpu_to_le16(fhci->vroot_hub->hub.wHubChange);
break;
case GetPortStatus:
port_status = (struct usb_port_status *)buf;
port_status->wPortStatus =
cpu_to_le16(fhci->vroot_hub->port.wPortStatus);
port_status->wPortChange =
cpu_to_le16(fhci->vroot_hub->port.wPortChange);
break;
case SetHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case SetPortFeature:
fhci->vroot_hub->feature |= (1 << wValue);
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
fhci->vroot_hub->port.wPortStatus |=
USB_PORT_STAT_ENABLE;
fhci_port_enable(fhci->usb_lld);
break;
case USB_PORT_FEAT_SUSPEND:
fhci->vroot_hub->port.wPortStatus |=
USB_PORT_STAT_SUSPEND;
fhci_stop_sof_timer(fhci);
break;
case USB_PORT_FEAT_RESET:
fhci->vroot_hub->port.wPortStatus |=
USB_PORT_STAT_RESET;
fhci_port_reset(fhci->usb_lld);
fhci->vroot_hub->port.wPortStatus |=
USB_PORT_STAT_ENABLE;
fhci->vroot_hub->port.wPortStatus &=
~USB_PORT_STAT_RESET;
break;
case USB_PORT_FEAT_POWER:
fhci->vroot_hub->port.wPortStatus |=
USB_PORT_STAT_POWER;
fhci_config_transceiver(fhci, FHCI_PORT_WAITING);
break;
default:
goto error;
}
break;
default:
error:
retval = -EPIPE;
}
fhci_dbg(fhci, "<- %s\n", __func__);
spin_unlock_irqrestore(&fhci->lock, flags);
return retval;
}
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