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399 lines
9.1 KiB
399 lines
9.1 KiB
// 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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