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