400 lines
9.1 KiB
C
400 lines
9.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver
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*
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* Copyright (C) 2006-2008 Barco N.V.
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* Derived from the Cypress cy7c67200/300 ezusb linux driver and
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* based on multiple host controller drivers inside the linux kernel.
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*/
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/usb.h>
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#include "c67x00.h"
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#include "c67x00-hcd.h"
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/* --------------------------------------------------------------------------
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* Root Hub Support
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*/
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static __u8 c67x00_hub_des[] = {
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0x09, /* __u8 bLength; */
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USB_DT_HUB, /* __u8 bDescriptorType; Hub-descriptor */
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0x02, /* __u8 bNbrPorts; */
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0x00, /* __u16 wHubCharacteristics; */
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0x00, /* (per-port OC, no power switching) */
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0x32, /* __u8 bPwrOn2pwrGood; 2ms */
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0x00, /* __u8 bHubContrCurrent; 0 mA */
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0x00, /* __u8 DeviceRemovable; ** 7 Ports max ** */
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0xff, /* __u8 PortPwrCtrlMask; ** 7 ports max ** */
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};
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static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port)
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{
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struct c67x00_hcd *c67x00 = sie->private_data;
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unsigned long flags;
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c67x00_ll_husb_reset(sie, port);
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spin_lock_irqsave(&c67x00->lock, flags);
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c67x00_ll_husb_reset_port(sie, port);
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spin_unlock_irqrestore(&c67x00->lock, flags);
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c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT);
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}
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static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf)
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{
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struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
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struct c67x00_sie *sie = c67x00->sie;
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u16 status;
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int i;
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*buf = 0;
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status = c67x00_ll_usb_get_status(sie);
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for (i = 0; i < C67X00_PORTS; i++)
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if (status & PORT_CONNECT_CHANGE(i))
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*buf |= (1 << i);
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/* bit 0 denotes hub change, b1..n port change */
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*buf <<= 1;
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return !!*buf;
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}
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static int c67x00_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 c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
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struct c67x00_sie *sie = c67x00->sie;
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u16 status, usb_status;
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int len = 0;
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unsigned int port = wIndex-1;
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u16 wPortChange, wPortStatus;
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switch (typeReq) {
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case GetHubStatus:
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*(__le32 *) buf = cpu_to_le32(0);
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len = 4; /* hub power */
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break;
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case GetPortStatus:
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if (wIndex > C67X00_PORTS)
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return -EPIPE;
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status = c67x00_ll_usb_get_status(sie);
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usb_status = c67x00_ll_get_usb_ctl(sie);
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wPortChange = 0;
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if (status & PORT_CONNECT_CHANGE(port))
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wPortChange |= USB_PORT_STAT_C_CONNECTION;
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wPortStatus = USB_PORT_STAT_POWER;
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if (!(status & PORT_SE0_STATUS(port)))
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wPortStatus |= USB_PORT_STAT_CONNECTION;
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if (usb_status & LOW_SPEED_PORT(port)) {
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wPortStatus |= USB_PORT_STAT_LOW_SPEED;
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c67x00->low_speed_ports |= (1 << port);
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} else
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c67x00->low_speed_ports &= ~(1 << port);
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if (usb_status & SOF_EOP_EN(port))
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wPortStatus |= USB_PORT_STAT_ENABLE;
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*(__le16 *) buf = cpu_to_le16(wPortStatus);
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*(__le16 *) (buf + 2) = cpu_to_le16(wPortChange);
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len = 4;
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break;
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case SetHubFeature: /* We don't implement these */
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case ClearHubFeature:
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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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len = 0;
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break;
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default:
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return -EPIPE;
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}
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break;
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case SetPortFeature:
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if (wIndex > C67X00_PORTS)
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return -EPIPE;
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switch (wValue) {
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case USB_PORT_FEAT_SUSPEND:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"SetPortFeature %d (SUSPEND)\n", port);
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len = 0;
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break;
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case USB_PORT_FEAT_RESET:
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c67x00_hub_reset_host_port(sie, port);
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len = 0;
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break;
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case USB_PORT_FEAT_POWER:
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/* Power always enabled */
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len = 0;
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break;
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default:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"%s: SetPortFeature %d (0x%04x) Error!\n",
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__func__, port, wValue);
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return -EPIPE;
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}
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break;
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case ClearPortFeature:
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if (wIndex > C67X00_PORTS)
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return -EPIPE;
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switch (wValue) {
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case USB_PORT_FEAT_ENABLE:
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/* Reset the port so that the c67x00 also notices the
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* disconnect */
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c67x00_hub_reset_host_port(sie, port);
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len = 0;
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break;
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case USB_PORT_FEAT_C_ENABLE:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"ClearPortFeature (%d): C_ENABLE\n", port);
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len = 0;
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break;
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case USB_PORT_FEAT_SUSPEND:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"ClearPortFeature (%d): SUSPEND\n", port);
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len = 0;
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break;
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case USB_PORT_FEAT_C_SUSPEND:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"ClearPortFeature (%d): C_SUSPEND\n", port);
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len = 0;
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break;
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case USB_PORT_FEAT_POWER:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"ClearPortFeature (%d): POWER\n", port);
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return -EPIPE;
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case USB_PORT_FEAT_C_CONNECTION:
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c67x00_ll_usb_clear_status(sie,
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PORT_CONNECT_CHANGE(port));
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len = 0;
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break;
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case USB_PORT_FEAT_C_OVER_CURRENT:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"ClearPortFeature (%d): OVER_CURRENT\n", port);
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len = 0;
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break;
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case USB_PORT_FEAT_C_RESET:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"ClearPortFeature (%d): C_RESET\n", port);
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len = 0;
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break;
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default:
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dev_dbg(c67x00_hcd_dev(c67x00),
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"%s: ClearPortFeature %d (0x%04x) Error!\n",
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__func__, port, wValue);
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return -EPIPE;
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}
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break;
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case GetHubDescriptor:
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len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength);
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memcpy(buf, c67x00_hub_des, len);
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break;
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default:
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dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__);
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return -EPIPE;
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}
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return 0;
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}
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/* ---------------------------------------------------------------------
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* Main part of host controller driver
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*/
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/**
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* c67x00_hcd_irq
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*
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* This function is called from the interrupt handler in c67x00-drv.c
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*/
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static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
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{
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struct c67x00_hcd *c67x00 = sie->private_data;
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struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
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/* Handle sie message flags */
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if (msg) {
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if (msg & HUSB_TDListDone)
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c67x00_sched_kick(c67x00);
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else
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dev_warn(c67x00_hcd_dev(c67x00),
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"Unknown SIE msg flag(s): 0x%04x\n", msg);
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}
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if (unlikely(hcd->state == HC_STATE_HALT))
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return;
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if (!HCD_HW_ACCESSIBLE(hcd))
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return;
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/* Handle Start of frame events */
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if (int_status & SOFEOP_FLG(sie->sie_num)) {
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c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
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c67x00_sched_kick(c67x00);
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}
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}
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/**
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* c67x00_hcd_start: Host controller start hook
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*/
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static int c67x00_hcd_start(struct usb_hcd *hcd)
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{
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hcd->uses_new_polling = 1;
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hcd->state = HC_STATE_RUNNING;
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set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
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return 0;
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}
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/**
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* c67x00_hcd_stop: Host controller stop hook
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*/
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static void c67x00_hcd_stop(struct usb_hcd *hcd)
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{
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/* Nothing to do */
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}
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static int c67x00_hcd_get_frame(struct usb_hcd *hcd)
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{
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struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
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u16 temp_val;
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dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__);
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temp_val = c67x00_ll_husb_get_frame(c67x00->sie);
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temp_val &= HOST_FRAME_MASK;
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return temp_val ? (temp_val - 1) : HOST_FRAME_MASK;
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}
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static const struct hc_driver c67x00_hc_driver = {
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.description = "c67x00-hcd",
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.product_desc = "Cypress C67X00 Host Controller",
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.hcd_priv_size = sizeof(struct c67x00_hcd),
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.flags = HCD_USB11 | HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.start = c67x00_hcd_start,
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.stop = c67x00_hcd_stop,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = c67x00_urb_enqueue,
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.urb_dequeue = c67x00_urb_dequeue,
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.endpoint_disable = c67x00_endpoint_disable,
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/*
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* scheduling support
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*/
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.get_frame_number = c67x00_hcd_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = c67x00_hub_status_data,
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.hub_control = c67x00_hub_control,
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};
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/* ---------------------------------------------------------------------
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* Setup/Teardown routines
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*/
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int c67x00_hcd_probe(struct c67x00_sie *sie)
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{
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struct c67x00_hcd *c67x00;
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struct usb_hcd *hcd;
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unsigned long flags;
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int retval;
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if (usb_disabled())
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return -ENODEV;
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hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie");
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if (!hcd) {
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retval = -ENOMEM;
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goto err0;
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}
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c67x00 = hcd_to_c67x00_hcd(hcd);
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spin_lock_init(&c67x00->lock);
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c67x00->sie = sie;
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INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]);
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INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]);
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INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]);
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INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]);
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c67x00->urb_count = 0;
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INIT_LIST_HEAD(&c67x00->td_list);
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c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num);
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c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num);
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c67x00->max_frame_bw = MAX_FRAME_BW_STD;
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c67x00_ll_husb_init_host_port(sie);
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init_completion(&c67x00->endpoint_disable);
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retval = c67x00_sched_start_scheduler(c67x00);
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if (retval)
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goto err1;
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retval = usb_add_hcd(hcd, 0, 0);
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if (retval) {
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dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n",
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__func__, retval);
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goto err2;
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}
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device_wakeup_enable(hcd->self.controller);
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spin_lock_irqsave(&sie->lock, flags);
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sie->private_data = c67x00;
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sie->irq = c67x00_hcd_irq;
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spin_unlock_irqrestore(&sie->lock, flags);
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return retval;
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err2:
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c67x00_sched_stop_scheduler(c67x00);
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err1:
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usb_put_hcd(hcd);
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err0:
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return retval;
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}
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/* may be called with controller, bus, and devices active */
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void c67x00_hcd_remove(struct c67x00_sie *sie)
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{
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struct c67x00_hcd *c67x00 = sie->private_data;
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struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
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c67x00_sched_stop_scheduler(c67x00);
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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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}
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