OpenWrt – Rev 1
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/*
* 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;
}