+++ /dev/null
-/*
- * ADM5120 HCD (Host Controller Driver) for USB
- *
- * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
- *
- * This file was derived from: drivers/usb/host/ohci-hub.c
- * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
- * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- */
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * ADM5120 Root Hub ... the nonsharable stuff
- */
-
-#define dbg_port(hc, label, num, value) \
- admhc_dbg(hc, \
- "%s port%d " \
- "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
- label, num, value, \
- (value & ADMHC_PS_PRSC) ? " PRSC" : "", \
- (value & ADMHC_PS_OCIC) ? " OCIC" : "", \
- (value & ADMHC_PS_PSSC) ? " PSSC" : "", \
- (value & ADMHC_PS_PESC) ? " PESC" : "", \
- (value & ADMHC_PS_CSC) ? " CSC" : "", \
- \
- (value & ADMHC_PS_LSDA) ? " LSDA" : "", \
- (value & ADMHC_PS_PPS) ? " PPS" : "", \
- (value & ADMHC_PS_PRS) ? " PRS" : "", \
- (value & ADMHC_PS_POCI) ? " POCI" : "", \
- (value & ADMHC_PS_PSS) ? " PSS" : "", \
- \
- (value & ADMHC_PS_PES) ? " PES" : "", \
- (value & ADMHC_PS_CCS) ? " CCS" : "" \
- );
-
-#define dbg_port_write(hc, label, num, value) \
- admhc_dbg(hc, \
- "%s port%d " \
- "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
- label, num, value, \
- (value & ADMHC_PS_PRSC) ? " PRSC" : "", \
- (value & ADMHC_PS_OCIC) ? " OCIC" : "", \
- (value & ADMHC_PS_PSSC) ? " PSSC" : "", \
- (value & ADMHC_PS_PESC) ? " PESC" : "", \
- (value & ADMHC_PS_CSC) ? " CSC" : "", \
- \
- (value & ADMHC_PS_CPP) ? " CPP" : "", \
- (value & ADMHC_PS_SPP) ? " SPP" : "", \
- (value & ADMHC_PS_SPR) ? " SPR" : "", \
- (value & ADMHC_PS_CPS) ? " CPS" : "", \
- (value & ADMHC_PS_SPS) ? " SPS" : "", \
- \
- (value & ADMHC_PS_SPE) ? " SPE" : "", \
- (value & ADMHC_PS_CPE) ? " CPE" : "" \
- );
-
-/*-------------------------------------------------------------------------*/
-
-/* build "status change" packet (one or two bytes) from HC registers */
-
-static int
-admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- int i, changed = 0, length = 1;
- int any_connected = 0;
- unsigned long flags;
- u32 status;
-
- spin_lock_irqsave(&ahcd->lock, flags);
- if (!HCD_HW_ACCESSIBLE(hcd))
- goto done;
-
- /* init status */
- status = admhc_read_rhdesc(ahcd);
- if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
- buf[0] = changed = 1;
- else
- buf[0] = 0;
- if (ahcd->num_ports > 7) {
- buf[1] = 0;
- length++;
- }
-
- /* look at each port */
- for (i = 0; i < ahcd->num_ports; i++) {
- status = admhc_read_portstatus(ahcd, i);
-
- /* can't autostop if ports are connected */
- any_connected |= (status & ADMHC_PS_CCS);
-
- if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
- | ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
- changed = 1;
- if (i < 7)
- buf[0] |= 1 << (i + 1);
- else
- buf[1] |= 1 << (i - 7);
- }
- }
-
- if (admhc_root_hub_state_changes(ahcd, changed,
- any_connected))
- set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
- else
- clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
-
-done:
- spin_unlock_irqrestore(&ahcd->lock, flags);
-
- return changed ? length : 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int admhc_get_hub_descriptor(struct admhcd *ahcd, char *buf)
-{
- struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
- u32 rh = admhc_read_rhdesc(ahcd);
- u16 temp;
-
- desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */
- desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */
- desc->bHubContrCurrent = 0x00; /* 0mA */
-
- desc->bNbrPorts = ahcd->num_ports;
- temp = 1 + (ahcd->num_ports / 8);
- desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
-
- /* FIXME */
- temp = 0;
- if (rh & ADMHC_RH_NPS) /* no power switching? */
- temp |= 0x0002;
- if (rh & ADMHC_RH_PSM) /* per-port power switching? */
- temp |= 0x0001;
- if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */
- temp |= 0x0010;
- else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */
- temp |= 0x0008;
- desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
-
- /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
- desc->u.hs.DeviceRemovable[0] = 0;
- desc->u.hs.DeviceRemovable[0] = ~0;
-
- return 0;
-}
-
-static int admhc_get_hub_status(struct admhcd *ahcd, char *buf)
-{
- struct usb_hub_status *hs = (struct usb_hub_status *)buf;
- u32 t = admhc_read_rhdesc(ahcd);
- u16 status, change;
-
- status = 0;
- status |= (t & ADMHC_RH_LPS) ? HUB_STATUS_LOCAL_POWER : 0;
- status |= (t & ADMHC_RH_OCI) ? HUB_STATUS_OVERCURRENT : 0;
-
- change = 0;
- change |= (t & ADMHC_RH_LPSC) ? HUB_CHANGE_LOCAL_POWER : 0;
- change |= (t & ADMHC_RH_OCIC) ? HUB_CHANGE_OVERCURRENT : 0;
-
- hs->wHubStatus = (__force __u16)cpu_to_hc16(ahcd, status);
- hs->wHubChange = (__force __u16)cpu_to_hc16(ahcd, change);
-
- return 0;
-}
-
-static int admhc_get_port_status(struct admhcd *ahcd, unsigned port, char *buf)
-{
- struct usb_port_status *ps = (struct usb_port_status *)buf;
- u32 t = admhc_read_portstatus(ahcd, port);
- u16 status, change;
-
- status = 0;
- status |= (t & ADMHC_PS_CCS) ? USB_PORT_STAT_CONNECTION : 0;
- status |= (t & ADMHC_PS_PES) ? USB_PORT_STAT_ENABLE : 0;
- status |= (t & ADMHC_PS_PSS) ? USB_PORT_STAT_SUSPEND : 0;
- status |= (t & ADMHC_PS_POCI) ? USB_PORT_STAT_OVERCURRENT : 0;
- status |= (t & ADMHC_PS_PRS) ? USB_PORT_STAT_RESET : 0;
- status |= (t & ADMHC_PS_PPS) ? USB_PORT_STAT_POWER : 0;
- status |= (t & ADMHC_PS_LSDA) ? USB_PORT_STAT_LOW_SPEED : 0;
-
- change = 0;
- change |= (t & ADMHC_PS_CSC) ? USB_PORT_STAT_C_CONNECTION : 0;
- change |= (t & ADMHC_PS_PESC) ? USB_PORT_STAT_C_ENABLE : 0;
- change |= (t & ADMHC_PS_PSSC) ? USB_PORT_STAT_C_SUSPEND : 0;
- change |= (t & ADMHC_PS_OCIC) ? USB_PORT_STAT_C_OVERCURRENT : 0;
- change |= (t & ADMHC_PS_PRSC) ? USB_PORT_STAT_C_RESET : 0;
-
- ps->wPortStatus = (__force __u16)cpu_to_hc16(ahcd, status);
- ps->wPortChange = (__force __u16)cpu_to_hc16(ahcd, change);
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef CONFIG_USB_OTG
-
-static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- u32 status;
-
- if (!port)
- return -EINVAL;
- port--;
-
- /* start port reset before HNP protocol times out */
- status = admhc_read_portstatus(ahcd, port);
- if (!(status & ADMHC_PS_CCS))
- return -ENODEV;
-
- /* khubd will finish the reset later */
- admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS);
- return 0;
-}
-
-static void start_hnp(struct admhcd *ahcd);
-
-#else
-
-#define admhc_start_port_reset NULL
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-
-/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
- * not necessarily continuous ... to guard against resume signaling.
- * The short timeout is safe for non-root hubs, and is backward-compatible
- * with earlier Linux hosts.
- */
-#ifdef CONFIG_USB_SUSPEND
-#define PORT_RESET_MSEC 50
-#else
-#define PORT_RESET_MSEC 10
-#endif
-
-/* this timer value might be vendor-specific ... */
-#define PORT_RESET_HW_MSEC 10
-
-/* wrap-aware logic morphed from <linux/jiffies.h> */
-#define tick_before(t1, t2) ((s16)(((s16)(t1)) - ((s16)(t2))) < 0)
-
-/* called from some task, normally khubd */
-static inline int admhc_port_reset(struct admhcd *ahcd, unsigned port)
-{
- u32 t;
-
- admhc_vdbg(ahcd, "reset port%d\n", port);
- t = admhc_read_portstatus(ahcd, port);
- if (!(t & ADMHC_PS_CCS))
- return -ENODEV;
-
- admhc_write_portstatus(ahcd, port, ADMHC_PS_SPR);
- mdelay(10);
- admhc_write_portstatus(ahcd, port, (ADMHC_PS_SPE | ADMHC_PS_CSC));
- mdelay(100);
-
- return 0;
-}
-
-static inline int admhc_port_enable(struct admhcd *ahcd, unsigned port)
-{
- u32 t;
-
- admhc_vdbg(ahcd, "enable port%d\n", port);
- t = admhc_read_portstatus(ahcd, port);
- if (!(t & ADMHC_PS_CCS))
- return -ENODEV;
-
- admhc_write_portstatus(ahcd, port, ADMHC_PS_SPE);
-
- return 0;
-}
-
-static inline int admhc_port_disable(struct admhcd *ahcd, unsigned port)
-{
- u32 t;
-
- admhc_vdbg(ahcd, "disable port%d\n", port);
- t = admhc_read_portstatus(ahcd, port);
- if (!(t & ADMHC_PS_CCS))
- return -ENODEV;
-
- admhc_write_portstatus(ahcd, port, ADMHC_PS_CPE);
-
- return 0;
-}
-
-static inline int admhc_port_write(struct admhcd *ahcd, unsigned port,
- u32 val)
-{
-#ifdef ADMHC_VERBOSE_DEBUG
- dbg_port_write(ahcd, "write", port, val);
-#endif
- admhc_write_portstatus(ahcd, port, val);
-
- return 0;
-}
-
-static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
- u16 wIndex, char *buf, u16 wLength)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- int ports = ahcd->num_ports;
- int ret = 0;
-
- if (unlikely(!HCD_HW_ACCESSIBLE(hcd)))
- return -ESHUTDOWN;
-
- switch (typeReq) {
- case ClearHubFeature:
- switch (wValue) {
- case C_HUB_OVER_CURRENT:
-#if 0 /* FIXME */
- admhc_writel(ahcd, ADMHC_RH_OCIC,
- &ahcd->regs->roothub.status);
-#endif
- case C_HUB_LOCAL_POWER:
- break;
- default:
- goto error;
- }
- break;
- case ClearPortFeature:
- if (!wIndex || wIndex > ports)
- goto error;
- wIndex--;
-
- switch (wValue) {
- case USB_PORT_FEAT_ENABLE:
- ret = admhc_port_disable(ahcd, wIndex);
- break;
- case USB_PORT_FEAT_SUSPEND:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS);
- break;
- case USB_PORT_FEAT_POWER:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP);
- break;
- case USB_PORT_FEAT_C_CONNECTION:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC);
- break;
- case USB_PORT_FEAT_C_ENABLE:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC);
- break;
- case USB_PORT_FEAT_C_SUSPEND:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC);
- break;
- case USB_PORT_FEAT_C_OVER_CURRENT:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC);
- break;
- case USB_PORT_FEAT_C_RESET:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC);
- break;
- default:
- goto error;
- }
- break;
- case GetHubDescriptor:
- ret = admhc_get_hub_descriptor(ahcd, buf);
- break;
- case GetHubStatus:
- ret = admhc_get_hub_status(ahcd, buf);
- break;
- case GetPortStatus:
- if (!wIndex || wIndex > ports)
- goto error;
- wIndex--;
-
- ret = admhc_get_port_status(ahcd, wIndex, buf);
- break;
- case SetHubFeature:
- switch (wValue) {
- case C_HUB_OVER_CURRENT:
- /* FIXME: this can be cleared, yes? */
- case C_HUB_LOCAL_POWER:
- break;
- default:
- goto error;
- }
- break;
- case SetPortFeature:
- if (!wIndex || wIndex > ports)
- goto error;
- wIndex--;
-
- switch (wValue) {
- case USB_PORT_FEAT_ENABLE:
- ret = admhc_port_enable(ahcd, wIndex);
- break;
- case USB_PORT_FEAT_RESET:
- ret = admhc_port_reset(ahcd, wIndex);
- break;
- case USB_PORT_FEAT_SUSPEND:
-#ifdef CONFIG_USB_OTG
- if (hcd->self.otg_port == (wIndex + 1)
- && hcd->self.b_hnp_enable)
- start_hnp(ahcd);
- else
-#endif
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS);
- break;
- case USB_PORT_FEAT_POWER:
- ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP);
- break;
- default:
- goto error;
- }
- break;
-
- default:
-error:
- /* "protocol stall" on error */
- ret = -EPIPE;
- }
-
- return ret;
-}
-
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