/* * 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 (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) 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); } } hcd->poll_rh = admhc_root_hub_state_changes(ahcd, changed, any_connected); 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); /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ desc->bitmap[0] = 0; desc->bitmap[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 = hcd_to_bus(hcd)->root_hub->maxchild; int ret = 0; if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 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; }