diff options
Diffstat (limited to 'target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c')
| -rw-r--r-- | target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c | 430 |
1 files changed, 430 insertions, 0 deletions
diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c new file mode 100644 index 0000000..8cabaf9 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c @@ -0,0 +1,430 @@ +/* + * 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; +} + |