/* * MUSB OTG driver core code * * Copyright 2005 Mentor Graphics Corporation * Copyright (C) 2005-2006 by Texas Instruments * Copyright (C) 2006-2007 Nokia Corporation * * 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. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /* * Inventra (Multipoint) Dual-Role Controller Driver for Linux. * * This consists of a Host Controller Driver (HCD) and a peripheral * controller driver implementing the "Gadget" API; OTG support is * in the works. These are normal Linux-USB controller drivers which * use IRQs and have no dedicated thread. * * This version of the driver has only been used with products from * Texas Instruments. Those products integrate the Inventra logic * with other DMA, IRQ, and bus modules, as well as other logic that * needs to be reflected in this driver. * * * NOTE: the original Mentor code here was pretty much a collection * of mechanisms that don't seem to have been fully integrated/working * for *any* Linux kernel version. This version aims at Linux 2.6.now, * Key open issues include: * * - Lack of host-side transaction scheduling, for all transfer types. * The hardware doesn't do it; instead, software must. * * This is not an issue for OTG devices that don't support external * hubs, but for more "normal" USB hosts it's a user issue that the * "multipoint" support doesn't scale in the expected ways. That * includes DaVinci EVM in a common non-OTG mode. * * * Control and bulk use dedicated endpoints, and there's as * yet no mechanism to either (a) reclaim the hardware when * peripherals are NAKing, which gets complicated with bulk * endpoints, or (b) use more than a single bulk endpoint in * each direction. * * RESULT: one device may be perceived as blocking another one. * * * Interrupt and isochronous will dynamically allocate endpoint * hardware, but (a) there's no record keeping for bandwidth; * (b) in the common case that few endpoints are available, there * is no mechanism to reuse endpoints to talk to multiple devices. * * RESULT: At one extreme, bandwidth can be overcommitted in * some hardware configurations, no faults will be reported. * At the other extreme, the bandwidth capabilities which do * exist tend to be severely undercommitted. You can't yet hook * up both a keyboard and a mouse to an external USB hub. */ /* * This gets many kinds of configuration information: * - Kconfig for everything user-configurable * - platform_device for addressing, irq, and platform_data * - platform_data is mostly for board-specific informarion * (plus recentrly, SOC or family details) * * Most of the conditional compilation will (someday) vanish. */ #include #include #include #include #include #include #include #include #include #ifdef CONFIG_ARM #include #include #include #endif #include "musb_core.h" #ifdef CONFIG_ARCH_DAVINCI #include "davinci.h" #endif unsigned musb_debug; module_param_named(debug, musb_debug, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Debug message level. Default = 0"); #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia" #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver" #define MUSB_VERSION "6.0" #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION #define MUSB_DRIVER_NAME "musb_hdrc" const char musb_driver_name[] = MUSB_DRIVER_NAME; MODULE_DESCRIPTION(DRIVER_INFO); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" MUSB_DRIVER_NAME); /*-------------------------------------------------------------------------*/ static inline struct musb *dev_to_musb(struct device *dev) { #ifdef CONFIG_USB_MUSB_HDRC_HCD /* usbcore insists dev->driver_data is a "struct hcd *" */ return hcd_to_musb(dev_get_drvdata(dev)); #else return dev_get_drvdata(dev); #endif } /*-------------------------------------------------------------------------*/ #if !defined(CONFIG_USB_TUSB6010) && !defined(CONFIG_BLACKFIN) /* * Load an endpoint's FIFO */ void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src) { void __iomem *fifo = hw_ep->fifo; prefetch((u8 *)src); DBG(4, "%cX ep%d fifo %p count %d buf %p\n", 'T', hw_ep->epnum, fifo, len, src); /* we can't assume unaligned reads work */ if (likely((0x01 & (unsigned long) src) == 0)) { u16 index = 0; /* best case is 32bit-aligned source address */ if ((0x02 & (unsigned long) src) == 0) { if (len >= 4) { writesl(fifo, src + index, len >> 2); index += len & ~0x03; } if (len & 0x02) { musb_writew(fifo, 0, *(u16 *)&src[index]); index += 2; } } else { if (len >= 2) { writesw(fifo, src + index, len >> 1); index += len & ~0x01; } } if (len & 0x01) musb_writeb(fifo, 0, src[index]); } else { /* byte aligned */ writesb(fifo, src, len); } } /* * Unload an endpoint's FIFO */ void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst) { void __iomem *fifo = hw_ep->fifo; DBG(4, "%cX ep%d fifo %p count %d buf %p\n", 'R', hw_ep->epnum, fifo, len, dst); /* we can't assume unaligned writes work */ if (likely((0x01 & (unsigned long) dst) == 0)) { u16 index = 0; /* best case is 32bit-aligned destination address */ if ((0x02 & (unsigned long) dst) == 0) { if (len >= 4) { readsl(fifo, dst, len >> 2); index = len & ~0x03; } if (len & 0x02) { *(u16 *)&dst[index] = musb_readw(fifo, 0); index += 2; } } else { if (len >= 2) { readsw(fifo, dst, len >> 1); index = len & ~0x01; } } if (len & 0x01) dst[index] = musb_readb(fifo, 0); } else { /* byte aligned */ readsb(fifo, dst, len); } } #endif /* normal PIO */ /*-------------------------------------------------------------------------*/ /* for high speed test mode; see USB 2.0 spec 7.1.20 */ static const u8 musb_test_packet[53] = { /* implicit SYNC then DATA0 to start */ /* JKJKJKJK x9 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* JJKKJJKK x8 */ 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, /* JJJJKKKK x8 */ 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, /* JJJJJJJKKKKKKK x8 */ 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* JJJJJJJK x8 */ 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, /* JKKKKKKK x10, JK */ 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e /* implicit CRC16 then EOP to end */ }; void musb_load_testpacket(struct musb *musb) { void __iomem *regs = musb->endpoints[0].regs; musb_ep_select(musb->mregs, 0); musb_write_fifo(musb->control_ep, sizeof(musb_test_packet), musb_test_packet); musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY); } /*-------------------------------------------------------------------------*/ const char *otg_state_string(struct musb *musb) { switch (musb->xceiv.state) { case OTG_STATE_A_IDLE: return "a_idle"; case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; case OTG_STATE_A_HOST: return "a_host"; case OTG_STATE_A_SUSPEND: return "a_suspend"; case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; case OTG_STATE_B_IDLE: return "b_idle"; case OTG_STATE_B_SRP_INIT: return "b_srp_init"; case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; case OTG_STATE_B_HOST: return "b_host"; default: return "UNDEFINED"; } } #ifdef CONFIG_USB_MUSB_OTG /* * See also USB_OTG_1-3.pdf 6.6.5 Timers * REVISIT: Are the other timers done in the hardware? */ #define TB_ASE0_BRST 100 /* Min 3.125 ms */ /* * Handles OTG hnp timeouts, such as b_ase0_brst */ void musb_otg_timer_func(unsigned long data) { struct musb *musb = (struct musb *)data; unsigned long flags; spin_lock_irqsave(&musb->lock, flags); switch (musb->xceiv.state) { case OTG_STATE_B_WAIT_ACON: DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n"); musb_g_disconnect(musb); musb->xceiv.state = OTG_STATE_B_PERIPHERAL; musb->is_active = 0; break; case OTG_STATE_A_WAIT_BCON: DBG(1, "HNP: a_wait_bcon timeout; back to a_host\n"); musb_hnp_stop(musb); break; default: DBG(1, "HNP: Unhandled mode %s\n", otg_state_string(musb)); } musb->ignore_disconnect = 0; spin_unlock_irqrestore(&musb->lock, flags); } static DEFINE_TIMER(musb_otg_timer, musb_otg_timer_func, 0, 0); /* * Stops the B-device HNP state. Caller must take care of locking. */ void musb_hnp_stop(struct musb *musb) { struct usb_hcd *hcd = musb_to_hcd(musb); void __iomem *mbase = musb->mregs; u8 reg; switch (musb->xceiv.state) { case OTG_STATE_A_PERIPHERAL: case OTG_STATE_A_WAIT_VFALL: case OTG_STATE_A_WAIT_BCON: DBG(1, "HNP: Switching back to A-host\n"); musb_g_disconnect(musb); musb->xceiv.state = OTG_STATE_A_IDLE; MUSB_HST_MODE(musb); musb->is_active = 0; break; case OTG_STATE_B_HOST: DBG(1, "HNP: Disabling HR\n"); hcd->self.is_b_host = 0; musb->xceiv.state = OTG_STATE_B_PERIPHERAL; MUSB_DEV_MODE(musb); reg = musb_readb(mbase, MUSB_POWER); reg |= MUSB_POWER_SUSPENDM; musb_writeb(mbase, MUSB_POWER, reg); /* REVISIT: Start SESSION_REQUEST here? */ break; default: DBG(1, "HNP: Stopping in unknown state %s\n", otg_state_string(musb)); } /* * When returning to A state after HNP, avoid hub_port_rebounce(), * which cause occasional OPT A "Did not receive reset after connect" * errors. */ musb->port1_status &= ~(1 << USB_PORT_FEAT_C_CONNECTION); } #endif /* * Interrupt Service Routine to record USB "global" interrupts. * Since these do not happen often and signify things of * paramount importance, it seems OK to check them individually; * the order of the tests is specified in the manual * * @param musb instance pointer * @param int_usb register contents * @param devctl * @param power */ #define STAGE0_MASK (MUSB_INTR_RESUME | MUSB_INTR_SESSREQ \ | MUSB_INTR_VBUSERROR | MUSB_INTR_CONNECT \ | MUSB_INTR_RESET) static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, u8 devctl, u8 power) { irqreturn_t handled = IRQ_NONE; void __iomem *mbase = musb->mregs; DBG(3, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl, int_usb); /* in host mode, the peripheral may issue remote wakeup. * in peripheral mode, the host may resume the link. * spurious RESUME irqs happen too, paired with SUSPEND. */ if (int_usb & MUSB_INTR_RESUME) { handled = IRQ_HANDLED; DBG(3, "RESUME (%s)\n", otg_state_string(musb)); if (devctl & MUSB_DEVCTL_HM) { #ifdef CONFIG_USB_MUSB_HDRC_HCD switch (musb->xceiv.state) { case OTG_STATE_A_SUSPEND: /* remote wakeup? later, GetPortStatus * will stop RESUME signaling */ if (power & MUSB_POWER_SUSPENDM) { /* spurious */ musb->int_usb &= ~MUSB_INTR_SUSPEND; DBG(2, "Spurious SUSPENDM\n"); break; } power &= ~MUSB_POWER_SUSPENDM; musb_writeb(mbase, MUSB_POWER, power | MUSB_POWER_RESUME); musb->port1_status |= (USB_PORT_STAT_C_SUSPEND << 16) | MUSB_PORT_STAT_RESUME; musb->rh_timer = jiffies + msecs_to_jiffies(20); musb->xceiv.state = OTG_STATE_A_HOST; musb->is_active = 1; usb_hcd_resume_root_hub(musb_to_hcd(musb)); break; case OTG_STATE_B_WAIT_ACON: musb->xceiv.state = OTG_STATE_B_PERIPHERAL; musb->is_active = 1; MUSB_DEV_MODE(musb); break; default: WARNING("bogus %s RESUME (%s)\n", "host", otg_state_string(musb)); } #endif } else { switch (musb->xceiv.state) { #ifdef CONFIG_USB_MUSB_HDRC_HCD case OTG_STATE_A_SUSPEND: /* possibly DISCONNECT is upcoming */ musb->xceiv.state = OTG_STATE_A_HOST; usb_hcd_resume_root_hub(musb_to_hcd(musb)); break; #endif #ifdef CONFIG_USB_GADGET_MUSB_HDRC case OTG_STATE_B_WAIT_ACON: case OTG_STATE_B_PERIPHERAL: /* disconnect while suspended? we may * not get a disconnect irq... */ if ((devctl & MUSB_DEVCTL_VBUS) != (3 << MUSB_DEVCTL_VBUS_SHIFT) ) { musb->int_usb |= MUSB_INTR_DISCONNECT; musb->int_usb &= ~MUSB_INTR_SUSPEND; break; } musb_g_resume(musb); break; case OTG_STATE_B_IDLE: musb->int_usb &= ~MUSB_INTR_SUSPEND; break; #endif default: WARNING("bogus %s RESUME (%s)\n", "peripheral", otg_state_string(musb)); } } } #ifdef CONFIG_USB_MUSB_HDRC_HCD /* see manual for the order of the tests */ if (int_usb & MUSB_INTR_SESSREQ) { DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb)); /* IRQ arrives from ID pin sense or (later, if VBUS power * is removed) SRP. responses are time critical: * - turn on VBUS (with silicon-specific mechanism) * - go through A_WAIT_VRISE * - ... to A_WAIT_BCON. * a_wait_vrise_tmout triggers VBUS_ERROR transitions */ musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); musb->ep0_stage = MUSB_EP0_START; musb->xceiv.state = OTG_STATE_A_IDLE; MUSB_HST_MODE(musb); musb_set_vbus(musb, 1); handled = IRQ_HANDLED; } if (int_usb & MUSB_INTR_VBUSERROR) { int ignore = 0; /* During connection as an A-Device, we may see a short * current spikes causing voltage drop, because of cable * and peripheral capacitance combined with vbus draw. * (So: less common with truly self-powered devices, where * vbus doesn't act like a power supply.) * * Such spikes are short; usually less than ~500 usec, max * of ~2 msec. That is, they're not sustained overcurrent * errors, though they're reported using VBUSERROR irqs. * * Workarounds: (a) hardware: use self powered devices. * (b) software: ignore non-repeated VBUS errors. * * REVISIT: do delays from lots of DEBUG_KERNEL checks * make trouble here, keeping VBUS < 4.4V ? */ switch (musb->xceiv.state) { case OTG_STATE_A_HOST: /* recovery is dicey once we've gotten past the * initial stages of enumeration, but if VBUS * stayed ok at the other end of the link, and * another reset is due (at least for high speed, * to redo the chirp etc), it might work OK... */ case OTG_STATE_A_WAIT_BCON: case OTG_STATE_A_WAIT_VRISE: if (musb->vbuserr_retry) { musb->vbuserr_retry--; ignore = 1; devctl |= MUSB_DEVCTL_SESSION; musb_writeb(mbase, MUSB_DEVCTL, devctl); } else { musb->port1_status |= (1 << USB_PORT_FEAT_OVER_CURRENT) | (1 << USB_PORT_FEAT_C_OVER_CURRENT); } break; default: break; } DBG(1, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n", otg_state_string(musb), devctl, ({ char *s; switch (devctl & MUSB_DEVCTL_VBUS) { case 0 << MUSB_DEVCTL_VBUS_SHIFT: s = "vbuserr_retry, musb->port1_status); /* go through A_WAIT_VFALL then start a new session */ if (!ignore) musb_set_vbus(musb, 0); handled = IRQ_HANDLED; } if (int_usb & MUSB_INTR_CONNECT) { struct usb_hcd *hcd = musb_to_hcd(musb); handled = IRQ_HANDLED; musb->is_active = 1; set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); musb->ep0_stage = MUSB_EP0_START; #ifdef CONFIG_USB_MUSB_OTG /* flush endpoints when transitioning from Device Mode */ if (is_peripheral_active(musb)) { /* REVISIT HNP; just force disconnect */ } musb_writew(mbase, MUSB_INTRTXE, musb->epmask); musb_writew(mbase, MUSB_INTRRXE, musb->epmask & 0xfffe); musb_writeb(mbase, MUSB_INTRUSBE, 0xf7); #endif musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED |USB_PORT_STAT_HIGH_SPEED |USB_PORT_STAT_ENABLE ); musb->port1_status |= USB_PORT_STAT_CONNECTION |(USB_PORT_STAT_C_CONNECTION << 16); /* high vs full speed is just a guess until after reset */ if (devctl & MUSB_DEVCTL_LSDEV) musb->port1_status |= USB_PORT_STAT_LOW_SPEED; if (hcd->status_urb) usb_hcd_poll_rh_status(hcd); else usb_hcd_resume_root_hub(hcd); MUSB_HST_MODE(musb); /* indicate new connection to OTG machine */ switch (musb->xceiv.state) { case OTG_STATE_B_PERIPHERAL: if (int_usb & MUSB_INTR_SUSPEND) { DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n"); musb->xceiv.state = OTG_STATE_B_HOST; hcd->self.is_b_host = 1; int_usb &= ~MUSB_INTR_SUSPEND; } else DBG(1, "CONNECT as b_peripheral???\n"); break; case OTG_STATE_B_WAIT_ACON: DBG(1, "HNP: Waiting to switch to b_host state\n"); musb->xceiv.state = OTG_STATE_B_HOST; hcd->self.is_b_host = 1; break; default: if ((devctl & MUSB_DEVCTL_VBUS) == (3 << MUSB_DEVCTL_VBUS_SHIFT)) { musb->xceiv.state = OTG_STATE_A_HOST; hcd->self.is_b_host = 0; } break; } DBG(1, "CONNECT (%s) devctl %02x\n", otg_state_string(musb), devctl); } #endif /* CONFIG_USB_MUSB_HDRC_HCD */ /* mentor saves a bit: bus reset and babble share the same irq. * only host sees babble; only peripheral sees bus reset. */ if (int_usb & MUSB_INTR_RESET) { if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) { /* * Looks like non-HS BABBLE can be ignored, but * HS BABBLE is an error condition. For HS the solution * is to avoid babble in the first place and fix what * caused BABBLE. When HS BABBLE happens we can only * stop the session. */ if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV)) DBG(1, "BABBLE devctl: %02x\n", devctl); else { ERR("Stopping host session -- babble\n"); musb_writeb(mbase, MUSB_DEVCTL, 0); } } else if (is_peripheral_capable()) { DBG(1, "BUS RESET as %s\n", otg_state_string(musb)); switch (musb->xceiv.state) { #ifdef CONFIG_USB_OTG case OTG_STATE_A_SUSPEND: /* We need to ignore disconnect on suspend * otherwise tusb 2.0 won't reconnect after a * power cycle, which breaks otg compliance. */ musb->ignore_disconnect = 1; musb_g_reset(musb); /* FALLTHROUGH */ case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */ DBG(1, "HNP: Setting timer as %s\n", otg_state_string(musb)); musb_otg_timer.data = (unsigned long)musb; mod_timer(&musb_otg_timer, jiffies + msecs_to_jiffies(100)); break; case OTG_STATE_A_PERIPHERAL: musb_hnp_stop(musb); break; case OTG_STATE_B_WAIT_ACON: DBG(1, "HNP: RESET (%s), to b_peripheral\n", otg_state_string(musb)); musb->xceiv.state = OTG_STATE_B_PERIPHERAL; musb_g_reset(musb); break; #endif case OTG_STATE_B_IDLE: musb->xceiv.state = OTG_STATE_B_PERIPHERAL; /* FALLTHROUGH */ case OTG_STATE_B_PERIPHERAL: musb_g_reset(musb); break; default: DBG(1, "Unhandled BUS RESET as %s\n", otg_state_string(musb)); } } handled = IRQ_HANDLED; } schedule_work(&musb->irq_work); return handled; } /* * Interrupt Service Routine to record USB "global" interrupts. * Since these do not happen often and signify things of * paramount importance, it seems OK to check them individually; * the order of the tests is specified in the manual * * @param musb instance pointer * @param int_usb register contents * @param devctl * @param power */ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb, u8 devctl, u8 power) { irqreturn_t handled = IRQ_NONE; #if 0 /* REVISIT ... this would be for multiplexing periodic endpoints, or * supporting transfer phasing to prevent exceeding ISO bandwidth * limits of a given frame or microframe. * * It's not needed for peripheral side, which dedicates endpoints; * though it _might_ use SOF irqs for other purposes. * * And it's not currently needed for host side, which also dedicates * endpoints, relies on TX/RX interval registers, and isn't claimed * to support ISO transfers yet. */ if (int_usb & MUSB_INTR_SOF) { void __iomem *mbase = musb->mregs; struct musb_hw_ep *ep; u8 epnum; u16 frame; DBG(6, "START_OF_FRAME\n"); handled = IRQ_HANDLED; /* start any periodic Tx transfers waiting for current frame */ frame = musb_readw(mbase, MUSB_FRAME); ep = musb->endpoints; for (epnum = 1; (epnum < musb->nr_endpoints) && (musb->epmask >= (1 << epnum)); epnum++, ep++) { /* * FIXME handle framecounter wraps (12 bits) * eliminate duplicated StartUrb logic */ if (ep->dwWaitFrame >= frame) { ep->dwWaitFrame = 0; pr_debug("SOF --> periodic TX%s on %d\n", ep->tx_channel ? " DMA" : "", epnum); if (!ep->tx_channel) musb_h_tx_start(musb, epnum); else cppi_hostdma_start(musb, epnum); } } /* end of for loop */ } #endif if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) { DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n", otg_state_string(musb), MUSB_MODE(musb), devctl); handled = IRQ_HANDLED; switch (musb->xceiv.state) { #ifdef CONFIG_USB_MUSB_HDRC_HCD case OTG_STATE_A_HOST: case OTG_STATE_A_SUSPEND: musb_root_disconnect(musb); if (musb->a_wait_bcon != 0) musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(musb->a_wait_bcon)); break; #endif /* HOST */ #ifdef CONFIG_USB_MUSB_OTG case OTG_STATE_B_HOST: musb_hnp_stop(musb); break; case OTG_STATE_A_PERIPHERAL: musb_hnp_stop(musb); musb_root_disconnect(musb); /* FALLTHROUGH */ case OTG_STATE_B_WAIT_ACON: /* FALLTHROUGH */ #endif /* OTG */ #ifdef CONFIG_USB_GADGET_MUSB_HDRC case OTG_STATE_B_PERIPHERAL: case OTG_STATE_B_IDLE: musb_g_disconnect(musb); break; #endif /* GADGET */ default: WARNING("unhandled DISCONNECT transition (%s)\n", otg_state_string(musb)); break; } schedule_work(&musb->irq_work); } if (int_usb & MUSB_INTR_SUSPEND) { DBG(1, "SUSPEND (%s) devctl %02x power %02x\n", otg_state_string(musb), devctl, power); handled = IRQ_HANDLED; switch (musb->xceiv.state) { #ifdef CONFIG_USB_MUSB_OTG case OTG_STATE_A_PERIPHERAL: /* * We cannot stop HNP here, devctl BDEVICE might be * still set. */ break; #endif case OTG_STATE_B_PERIPHERAL: musb_g_suspend(musb); musb->is_active = is_otg_enabled(musb) && musb->xceiv.gadget->b_hnp_enable; if (musb->is_active) { #ifdef CONFIG_USB_MUSB_OTG musb->xceiv.state = OTG_STATE_B_WAIT_ACON; DBG(1, "HNP: Setting timer for b_ase0_brst\n"); musb_otg_timer.data = (unsigned long)musb; mod_timer(&musb_otg_timer, jiffies + msecs_to_jiffies(TB_ASE0_BRST)); #endif } break; case OTG_STATE_A_WAIT_BCON: if (musb->a_wait_bcon != 0) musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(musb->a_wait_bcon)); break; case OTG_STATE_A_HOST: musb->xceiv.state = OTG_STATE_A_SUSPEND; musb->is_active = is_otg_enabled(musb) && musb->xceiv.host->b_hnp_enable; break; case OTG_STATE_B_HOST: /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ DBG(1, "REVISIT: SUSPEND as B_HOST\n"); break; default: /* "should not happen" */ musb->is_active = 0; break; } schedule_work(&musb->irq_work); } return handled; } /*-------------------------------------------------------------------------*/ /* * Program the HDRC to start (enable interrupts, dma, etc.). */ void musb_start(struct musb *musb) { void __iomem *regs = musb->mregs; u8 devctl = musb_readb(regs, MUSB_DEVCTL); DBG(2, "<== devctl %02x\n", devctl); /* Set INT enable registers, enable interrupts */ musb_writew(regs, MUSB_INTRTXE, musb->epmask); musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe); musb_writeb(regs, MUSB_INTRUSBE, 0xf7); musb_writeb(regs, MUSB_TESTMODE, 0); /* put into basic highspeed mode and start session */ musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE | MUSB_POWER_SOFTCONN | MUSB_POWER_HSENAB /* ENSUSPEND wedges tusb */ /* | MUSB_POWER_ENSUSPEND */ ); musb->is_active = 0; devctl = musb_readb(regs, MUSB_DEVCTL); devctl &= ~MUSB_DEVCTL_SESSION; if (is_otg_enabled(musb)) { /* session started after: * (a) ID-grounded irq, host mode; * (b) vbus present/connect IRQ, peripheral mode; * (c) peripheral initiates, using SRP */ if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) musb->is_active = 1; else devctl |= MUSB_DEVCTL_SESSION; } else if (is_host_enabled(musb)) { /* assume ID pin is hard-wired to ground */ devctl |= MUSB_DEVCTL_SESSION; } else /* peripheral is enabled */ { if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) musb->is_active = 1; } musb_platform_enable(musb); musb_writeb(regs, MUSB_DEVCTL, devctl); } static void musb_generic_disable(struct musb *musb) { void __iomem *mbase = musb->mregs; u16 temp; /* disable interrupts */ musb_writeb(mbase, MUSB_INTRUSBE, 0); musb_writew(mbase, MUSB_INTRTXE, 0); musb_writew(mbase, MUSB_INTRRXE, 0); /* off */ musb_writeb(mbase, MUSB_DEVCTL, 0); /* flush pending interrupts */ temp = musb_readb(mbase, MUSB_INTRUSB); temp = musb_readw(mbase, MUSB_INTRTX); temp = musb_readw(mbase, MUSB_INTRRX); } /* * Make the HDRC stop (disable interrupts, etc.); * reversible by musb_start * called on gadget driver unregister * with controller locked, irqs blocked * acts as a NOP unless some role activated the hardware */ void musb_stop(struct musb *musb) { /* stop IRQs, timers, ... */ musb_platform_disable(musb); musb_generic_disable(musb); DBG(3, "HDRC disabled\n"); /* FIXME * - mark host and/or peripheral drivers unusable/inactive * - disable DMA (and enable it in HdrcStart) * - make sure we can musb_start() after musb_stop(); with * OTG mode, gadget driver module rmmod/modprobe cycles that * - ... */ musb_platform_try_idle(musb, 0); } static void musb_shutdown(struct platform_device *pdev) { struct musb *musb = dev_to_musb(&pdev->dev); unsigned long flags; spin_lock_irqsave(&musb->lock, flags); musb_platform_disable(musb); musb_generic_disable(musb); if (musb->clock) { clk_put(musb->clock); musb->clock = NULL; } spin_unlock_irqrestore(&musb->lock, flags); /* FIXME power down */ } /*-------------------------------------------------------------------------*/ /* * The silicon either has hard-wired endpoint configurations, or else * "dynamic fifo" sizing. The driver has support for both, though at this * writing only the dynamic sizing is very well tested. Since we switched * away from compile-time hardware parameters, we can no longer rely on * dead code elimination to leave only the relevant one in the object file. * * We don't currently use dynamic fifo setup capability to do anything * more than selecting one of a bunch of predefined configurations. */ #if defined(CONFIG_USB_TUSB6010) || \ defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX) static ushort __initdata fifo_mode = 4; #else static ushort __initdata fifo_mode = 2; #endif /* "modprobe ... fifo_mode=1" etc */ module_param(fifo_mode, ushort, 0); MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration"); enum fifo_style { FIFO_RXTX, FIFO_TX, FIFO_RX } __attribute__ ((packed)); enum buf_mode { BUF_SINGLE, BUF_DOUBLE } __attribute__ ((packed)); struct fifo_cfg { u8 hw_ep_num; enum fifo_style style; enum buf_mode mode; u16 maxpacket; }; /* * tables defining fifo_mode values. define more if you like. * for host side, make sure both halves of ep1 are set up. */ /* mode 0 - fits in 2KB */ static struct fifo_cfg __initdata mode_0_cfg[] = { { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, }, { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, }; /* mode 1 - fits in 4KB */ static struct fifo_cfg __initdata mode_1_cfg[] = { { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, }, { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, }; /* mode 2 - fits in 4KB */ static struct fifo_cfg __initdata mode_2_cfg[] = { { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, }; /* mode 3 - fits in 4KB */ static struct fifo_cfg __initdata mode_3_cfg[] = { { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, }; /* mode 4 - fits in 16KB */ static struct fifo_cfg __initdata mode_4_cfg[] = { { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 13, .style = FIFO_TX, .maxpacket = 512, }, { .hw_ep_num = 13, .style = FIFO_RX, .maxpacket = 512, }, { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, }, { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, }, }; /* * configure a fifo; for non-shared endpoints, this may be called * once for a tx fifo and once for an rx fifo. * * returns negative errno or offset for next fifo. */ static int __init fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep, const struct fifo_cfg *cfg, u16 offset) { void __iomem *mbase = musb->mregs; int size = 0; u16 maxpacket = cfg->maxpacket; u16 c_off = offset >> 3; u8 c_size; /* expect hw_ep has already been zero-initialized */ size = ffs(max(maxpacket, (u16) 8)) - 1; maxpacket = 1 << size; c_size = size - 3; if (cfg->mode == BUF_DOUBLE) { if ((offset + (maxpacket << 1)) > (1 << (musb->config->ram_bits + 2))) return -EMSGSIZE; c_size |= MUSB_FIFOSZ_DPB; } else { if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2))) return -EMSGSIZE; } /* configure the FIFO */ musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum); #ifdef CONFIG_USB_MUSB_HDRC_HCD /* EP0 reserved endpoint for control, bidirectional; * EP1 reserved for bulk, two unidirection halves. */ if (hw_ep->epnum == 1) musb->bulk_ep = hw_ep; /* REVISIT error check: be sure ep0 can both rx and tx ... */ #endif switch (cfg->style) { case FIFO_TX: musb_write_txfifosz(mbase, c_size); musb_write_txfifoadd(mbase, c_off); hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); hw_ep->max_packet_sz_tx = maxpacket; break; case FIFO_RX: musb_write_rxfifosz(mbase, c_size); musb_write_rxfifoadd(mbase, c_off); hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); hw_ep->max_packet_sz_rx = maxpacket; break; case FIFO_RXTX: musb_write_txfifosz(mbase, c_size); musb_write_txfifoadd(mbase, c_off); hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); hw_ep->max_packet_sz_rx = maxpacket; musb_write_rxfifosz(mbase, c_size); musb_write_rxfifoadd(mbase, c_off); hw_ep->tx_double_buffered = hw_ep->rx_double_buffered; hw_ep->max_packet_sz_tx = maxpacket; hw_ep->is_shared_fifo = true; break; } /* NOTE rx and tx endpoint irqs aren't managed separately, * which happens to be ok */ musb->epmask |= (1 << hw_ep->epnum); return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0)); } static struct fifo_cfg __initdata ep0_cfg = { .style = FIFO_RXTX, .maxpacket = 64, }; static int __init ep_config_from_table(struct musb *musb) { const struct fifo_cfg *cfg; unsigned i, n; int offset; struct musb_hw_ep *hw_ep = musb->endpoints; switch (fifo_mode) { default: fifo_mode = 0; /* FALLTHROUGH */ case 0: cfg = mode_0_cfg; n = ARRAY_SIZE(mode_0_cfg); break; case 1: cfg = mode_1_cfg; n = ARRAY_SIZE(mode_1_cfg); break; case 2: cfg = mode_2_cfg; n = ARRAY_SIZE(mode_2_cfg); break; case 3: cfg = mode_3_cfg; n = ARRAY_SIZE(mode_3_cfg); break; case 4: cfg = mode_4_cfg; n = ARRAY_SIZE(mode_4_cfg); break; } printk(KERN_DEBUG "%s: setup fifo_mode %d\n", musb_driver_name, fifo_mode); offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0); /* assert(offset > 0) */ /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would * be better than static musb->config->num_eps and DYN_FIFO_SIZE... */ for (i = 0; i < n; i++) { u8 epn = cfg->hw_ep_num; if (epn >= musb->config->num_eps) { pr_debug("%s: invalid ep %d\n", musb_driver_name, epn); return -EINVAL; } offset = fifo_setup(musb, hw_ep + epn, cfg++, offset); if (offset < 0) { pr_debug("%s: mem overrun, ep %d\n", musb_driver_name, epn); return -EINVAL; } epn++; musb->nr_endpoints = max(epn, musb->nr_endpoints); } printk(KERN_DEBUG "%s: %d/%d max ep, %d/%d memory\n", musb_driver_name, n + 1, musb->config->num_eps * 2 - 1, offset, (1 << (musb->config->ram_bits + 2))); #ifdef CONFIG_USB_MUSB_HDRC_HCD if (!musb->bulk_ep) { pr_debug("%s: missing bulk\n", musb_driver_name); return -EINVAL; } #endif return 0; } /* * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false * @param musb the controller */ static int __init ep_config_from_hw(struct musb *musb) { u8 epnum = 0; struct musb_hw_ep *hw_ep; void *mbase = musb->mregs; int ret = 0; DBG(2, "<== static silicon ep config\n"); /* FIXME pick up ep0 maxpacket size */ for (epnum = 1; epnum < musb->config->num_eps; epnum++) { musb_ep_select(mbase, epnum); hw_ep = musb->endpoints + epnum; ret = musb_read_fifosize(musb, hw_ep, epnum); if (ret < 0) break; /* FIXME set up hw_ep->{rx,tx}_double_buffered */ #ifdef CONFIG_USB_MUSB_HDRC_HCD /* pick an RX/TX endpoint for bulk */ if (hw_ep->max_packet_sz_tx < 512 || hw_ep->max_packet_sz_rx < 512) continue; /* REVISIT: this algorithm is lazy, we should at least * try to pick a double buffered endpoint. */ if (musb->bulk_ep) continue; musb->bulk_ep = hw_ep; #endif } #ifdef CONFIG_USB_MUSB_HDRC_HCD if (!musb->bulk_ep) { pr_debug("%s: missing bulk\n", musb_driver_name); return -EINVAL; } #endif return 0; } enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, }; /* Initialize MUSB (M)HDRC part of the USB hardware subsystem; * configure endpoints, or take their config from silicon */ static int __init musb_core_init(u16 musb_type, struct musb *musb) { #ifdef MUSB_AHB_ID u32 data; #endif u8 reg; char *type; u16 hwvers, rev_major, rev_minor; char aInfo[78], aRevision[32], aDate[12]; void __iomem *mbase = musb->mregs; int status = 0; int i; /* log core options (read using indexed model) */ musb_ep_select(mbase, 0); reg = musb_read_configdata(mbase); strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8"); if (reg & MUSB_CONFIGDATA_DYNFIFO) strcat(aInfo, ", dyn FIFOs"); if (reg & MUSB_CONFIGDATA_MPRXE) { strcat(aInfo, ", bulk combine"); #ifdef C_MP_RX musb->bulk_combine = true; #else strcat(aInfo, " (X)"); /* no driver support */ #endif } if (reg & MUSB_CONFIGDATA_MPTXE) { strcat(aInfo, ", bulk split"); #ifdef C_MP_TX musb->bulk_split = true; #else strcat(aInfo, " (X)"); /* no driver support */ #endif } if (reg & MUSB_CONFIGDATA_HBRXE) { strcat(aInfo, ", HB-ISO Rx"); strcat(aInfo, " (X)"); /* no driver support */ } if (reg & MUSB_CONFIGDATA_HBTXE) { strcat(aInfo, ", HB-ISO Tx"); strcat(aInfo, " (X)"); /* no driver support */ } if (reg & MUSB_CONFIGDATA_SOFTCONE) strcat(aInfo, ", SoftConn"); printk(KERN_DEBUG "%s: ConfigData=0x%02x (%s)\n", musb_driver_name, reg, aInfo); #ifdef MUSB_AHB_ID data = musb_readl(mbase, 0x404); sprintf(aDate, "%04d-%02x-%02x", (data & 0xffff), (data >> 16) & 0xff, (data >> 24) & 0xff); /* FIXME ID2 and ID3 are unused */ data = musb_readl(mbase, 0x408); printk(KERN_DEBUG "ID2=%lx\n", (long unsigned)data); data = musb_readl(mbase, 0x40c); printk(KERN_DEBUG "ID3=%lx\n", (long unsigned)data); reg = musb_readb(mbase, 0x400); musb_type = ('M' == reg) ? MUSB_CONTROLLER_MHDRC : MUSB_CONTROLLER_HDRC; #else aDate[0] = 0; #endif if (MUSB_CONTROLLER_MHDRC == musb_type) { musb->is_multipoint = 1; type = "M"; } else { musb->is_multipoint = 0; type = ""; #ifdef CONFIG_USB_MUSB_HDRC_HCD #ifndef CONFIG_USB_OTG_BLACKLIST_HUB printk(KERN_ERR "%s: kernel must blacklist external hubs\n", musb_driver_name); #endif #endif } /* log release info */ hwvers = musb_read_hwvers(mbase); rev_major = (hwvers >> 10) & 0x1f; rev_minor = hwvers & 0x3ff; snprintf(aRevision, 32, "%d.%d%s", rev_major, rev_minor, (hwvers & 0x8000) ? "RC" : ""); printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n", musb_driver_name, type, aRevision, aDate); /* configure ep0 */ musb_configure_ep0(musb); /* discover endpoint configuration */ musb->nr_endpoints = 1; musb->epmask = 1; if (reg & MUSB_CONFIGDATA_DYNFIFO) { if (musb->config->dyn_fifo) status = ep_config_from_table(musb); else { ERR("reconfigure software for Dynamic FIFOs\n"); status = -ENODEV; } } else { if (!musb->config->dyn_fifo) status = ep_config_from_hw(musb); else { ERR("reconfigure software for static FIFOs\n"); return -ENODEV; } } if (status < 0) return status; /* finish init, and print endpoint config */ for (i = 0; i < musb->nr_endpoints; i++) { struct musb_hw_ep *hw_ep = musb->endpoints + i; hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase; #ifdef CONFIG_USB_TUSB6010 hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i); hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i); hw_ep->fifo_sync_va = musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i); if (i == 0) hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF; else hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2); #endif hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase; #ifdef CONFIG_USB_MUSB_HDRC_HCD hw_ep->target_regs = musb_read_target_reg_base(i, mbase); hw_ep->rx_reinit = 1; hw_ep->tx_reinit = 1; #endif if (hw_ep->max_packet_sz_tx) { printk(KERN_DEBUG "%s: hw_ep %d%s, %smax %d\n", musb_driver_name, i, hw_ep->is_shared_fifo ? "shared" : "tx", hw_ep->tx_double_buffered ? "doublebuffer, " : "", hw_ep->max_packet_sz_tx); } if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) { printk(KERN_DEBUG "%s: hw_ep %d%s, %smax %d\n", musb_driver_name, i, "rx", hw_ep->rx_double_buffered ? "doublebuffer, " : "", hw_ep->max_packet_sz_rx); } if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx)) DBG(1, "hw_ep %d not configured\n", i); } return 0; } /*-------------------------------------------------------------------------*/ #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430) static irqreturn_t generic_interrupt(int irq, void *__hci) { unsigned long flags; irqreturn_t retval = IRQ_NONE; struct musb *musb = __hci; spin_lock_irqsave(&musb->lock, flags); musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); if (musb->int_usb || musb->int_tx || musb->int_rx) retval = musb_interrupt(musb); spin_unlock_irqrestore(&musb->lock, flags); /* REVISIT we sometimes get spurious IRQs on g_ep0 * not clear why... */ if (retval != IRQ_HANDLED) DBG(5, "spurious?\n"); return IRQ_HANDLED; } #else #define generic_interrupt NULL #endif /* * handle all the irqs defined by the HDRC core. for now we expect: other * irq sources (phy, dma, etc) will be handled first, musb->int_* values * will be assigned, and the irq will already have been acked. * * called in irq context with spinlock held, irqs blocked */ irqreturn_t musb_interrupt(struct musb *musb) { irqreturn_t retval = IRQ_NONE; u8 devctl, power; int ep_num; u32 reg; devctl = musb_readb(musb->mregs, MUSB_DEVCTL); power = musb_readb(musb->mregs, MUSB_POWER); DBG(4, "** IRQ %s usb%04x tx%04x rx%04x\n", (devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral", musb->int_usb, musb->int_tx, musb->int_rx); /* the core can interrupt us for multiple reasons; docs have * a generic interrupt flowchart to follow */ if (musb->int_usb & STAGE0_MASK) retval |= musb_stage0_irq(musb, musb->int_usb, devctl, power); /* "stage 1" is handling endpoint irqs */ /* handle endpoint 0 first */ if (musb->int_tx & 1) { if (devctl & MUSB_DEVCTL_HM) retval |= musb_h_ep0_irq(musb); else retval |= musb_g_ep0_irq(musb); } /* RX on endpoints 1-15 */ reg = musb->int_rx >> 1; ep_num = 1; while (reg) { if (reg & 1) { /* musb_ep_select(musb->mregs, ep_num); */ /* REVISIT just retval = ep->rx_irq(...) */ retval = IRQ_HANDLED; if (devctl & MUSB_DEVCTL_HM) { if (is_host_capable()) musb_host_rx(musb, ep_num); } else { if (is_peripheral_capable()) musb_g_rx(musb, ep_num); } } reg >>= 1; ep_num++; } /* TX on endpoints 1-15 */ reg = musb->int_tx >> 1; ep_num = 1; while (reg) { if (reg & 1) { /* musb_ep_select(musb->mregs, ep_num); */ /* REVISIT just retval |= ep->tx_irq(...) */ retval = IRQ_HANDLED; if (devctl & MUSB_DEVCTL_HM) { if (is_host_capable()) musb_host_tx(musb, ep_num); } else { if (is_peripheral_capable()) musb_g_tx(musb, ep_num); } } reg >>= 1; ep_num++; } /* finish handling "global" interrupts after handling fifos */ if (musb->int_usb) retval |= musb_stage2_irq(musb, musb->int_usb, devctl, power); return retval; } #ifndef CONFIG_MUSB_PIO_ONLY static int __initdata use_dma = 1; /* "modprobe ... use_dma=0" etc */ module_param(use_dma, bool, 0); MODULE_PARM_DESC(use_dma, "enable/disable use of DMA"); void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit) { u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); /* called with controller lock already held */ if (!epnum) { #ifndef CONFIG_USB_TUSB_OMAP_DMA if (!is_cppi_enabled()) { /* endpoint 0 */ if (devctl & MUSB_DEVCTL_HM) musb_h_ep0_irq(musb); else musb_g_ep0_irq(musb); } #endif } else { /* endpoints 1..15 */ if (transmit) { if (devctl & MUSB_DEVCTL_HM) { if (is_host_capable()) musb_host_tx(musb, epnum); } else { if (is_peripheral_capable()) musb_g_tx(musb, epnum); } } else { /* receive */ if (devctl & MUSB_DEVCTL_HM) { if (is_host_capable()) musb_host_rx(musb, epnum); } else { if (is_peripheral_capable()) musb_g_rx(musb, epnum); } } } } #else #define use_dma 0 #endif /*-------------------------------------------------------------------------*/ #ifdef CONFIG_SYSFS static ssize_t musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { struct musb *musb = dev_to_musb(dev); unsigned long flags; int ret = -EINVAL; spin_lock_irqsave(&musb->lock, flags); ret = sprintf(buf, "%s\n", otg_state_string(musb)); spin_unlock_irqrestore(&musb->lock, flags); return ret; } static ssize_t musb_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { struct musb *musb = dev_to_musb(dev); unsigned long flags; int status; spin_lock_irqsave(&musb->lock, flags); if (sysfs_streq(buf, "host")) status = musb_platform_set_mode(musb, MUSB_HOST); else if (sysfs_streq(buf, "peripheral")) status = musb_platform_set_mode(musb, MUSB_PERIPHERAL); else if (sysfs_streq(buf, "otg")) status = musb_platform_set_mode(musb, MUSB_OTG); else status = -EINVAL; spin_unlock_irqrestore(&musb->lock, flags); return (status == 0) ? n : status; } static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store); static ssize_t musb_vbus_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { struct musb *musb = dev_to_musb(dev); unsigned long flags; unsigned long val; if (sscanf(buf, "%lu", &val) < 1) { printk(KERN_ERR "Invalid VBUS timeout ms value\n"); return -EINVAL; } spin_lock_irqsave(&musb->lock, flags); musb->a_wait_bcon = val; if (musb->xceiv.state == OTG_STATE_A_WAIT_BCON) musb->is_active = 0; musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val)); spin_unlock_irqrestore(&musb->lock, flags); return n; } static ssize_t musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) { struct musb *musb = dev_to_musb(dev); unsigned long flags; unsigned long val; int vbus; spin_lock_irqsave(&musb->lock, flags); val = musb->a_wait_bcon; vbus = musb_platform_get_vbus_status(musb); spin_unlock_irqrestore(&musb->lock, flags); return sprintf(buf, "Vbus %s, timeout %lu\n", vbus ? "on" : "off", val); } static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store); #ifdef CONFIG_USB_GADGET_MUSB_HDRC /* Gadget drivers can't know that a host is connected so they might want * to start SRP, but users can. This allows userspace to trigger SRP. */ static ssize_t musb_srp_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { struct musb *musb = dev_to_musb(dev); unsigned short srp; if (sscanf(buf, "%hu", &srp) != 1 || (srp != 1)) { printk(KERN_ERR "SRP: Value must be 1\n"); return -EINVAL; } if (srp == 1) musb_g_wakeup(musb); return n; } static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store); #endif /* CONFIG_USB_GADGET_MUSB_HDRC */ #endif /* sysfs */ /* Only used to provide driver mode change events */ static void musb_irq_work(struct work_struct *data) { struct musb *musb = container_of(data, struct musb, irq_work); static int old_state; if (musb->xceiv.state != old_state) { old_state = musb->xceiv.state; sysfs_notify(&musb->controller->kobj, NULL, "mode"); } } /* -------------------------------------------------------------------------- * Init support */ static struct musb *__init allocate_instance(struct device *dev, struct musb_hdrc_config *config, void __iomem *mbase) { struct musb *musb; struct musb_hw_ep *ep; int epnum; #ifdef CONFIG_USB_MUSB_HDRC_HCD struct usb_hcd *hcd; hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev)); if (!hcd) return NULL; /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */ musb = hcd_to_musb(hcd); INIT_LIST_HEAD(&musb->control); INIT_LIST_HEAD(&musb->in_bulk); INIT_LIST_HEAD(&musb->out_bulk); hcd->uses_new_polling = 1; musb->vbuserr_retry = VBUSERR_RETRY_COUNT; #else musb = kzalloc(sizeof *musb, GFP_KERNEL); if (!musb) return NULL; dev_set_drvdata(dev, musb); #endif musb->mregs = mbase; musb->ctrl_base = mbase; musb->nIrq = -ENODEV; musb->config = config; BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS); for (epnum = 0, ep = musb->endpoints; epnum < musb->config->num_eps; epnum++, ep++) { ep->musb = musb; ep->epnum = epnum; } musb->controller = dev; return musb; } static void musb_free(struct musb *musb) { /* this has multiple entry modes. it handles fault cleanup after * probe(), where things may be partially set up, as well as rmmod * cleanup after everything's been de-activated. */ #ifdef CONFIG_SYSFS device_remove_file(musb->controller, &dev_attr_mode); device_remove_file(musb->controller, &dev_attr_vbus); #ifdef CONFIG_USB_MUSB_OTG device_remove_file(musb->controller, &dev_attr_srp); #endif #endif #ifdef CONFIG_USB_GADGET_MUSB_HDRC musb_gadget_cleanup(musb); #endif if (musb->nIrq >= 0) { if (musb->irq_wake) disable_irq_wake(musb->nIrq); free_irq(musb->nIrq, musb); } if (is_dma_capable() && musb->dma_controller) { struct dma_controller *c = musb->dma_controller; (void) c->stop(c); dma_controller_destroy(c); } musb_writeb(musb->mregs, MUSB_DEVCTL, 0); musb_platform_exit(musb); musb_writeb(musb->mregs, MUSB_DEVCTL, 0); if (musb->clock) { clk_disable(musb->clock); clk_put(musb->clock); } #ifdef CONFIG_USB_MUSB_OTG put_device(musb->xceiv.dev); #endif #ifdef CONFIG_USB_MUSB_HDRC_HCD usb_put_hcd(musb_to_hcd(musb)); #else kfree(musb); #endif } /* * Perform generic per-controller initialization. * * @pDevice: the controller (already clocked, etc) * @nIrq: irq * @mregs: virtual address of controller registers, * not yet corrected for platform-specific offsets */ static int __init musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) { int status; struct musb *musb; struct musb_hdrc_platform_data *plat = dev->platform_data; /* The driver might handle more features than the board; OK. * Fail when the board needs a feature that's not enabled. */ if (!plat) { dev_dbg(dev, "no platform_data?\n"); return -ENODEV; } switch (plat->mode) { case MUSB_HOST: #ifdef CONFIG_USB_MUSB_HDRC_HCD break; #else goto bad_config; #endif case MUSB_PERIPHERAL: #ifdef CONFIG_USB_GADGET_MUSB_HDRC break; #else goto bad_config; #endif case MUSB_OTG: #ifdef CONFIG_USB_MUSB_OTG break; #else bad_config: #endif default: dev_err(dev, "incompatible Kconfig role setting\n"); return -EINVAL; } /* allocate */ musb = allocate_instance(dev, plat->config, ctrl); if (!musb) return -ENOMEM; spin_lock_init(&musb->lock); musb->board_mode = plat->mode; musb->board_set_power = plat->set_power; musb->set_clock = plat->set_clock; musb->min_power = plat->min_power; /* Clock usage is chip-specific ... functional clock (DaVinci, * OMAP2430), or PHY ref (some TUSB6010 boards). All this core * code does is make sure a clock handle is available; platform * code manages it during start/stop and suspend/resume. */ if (plat->clock) { musb->clock = clk_get(dev, plat->clock); if (IS_ERR(musb->clock)) { status = PTR_ERR(musb->clock); musb->clock = NULL; goto fail; } } /* assume vbus is off */ /* platform adjusts musb->mregs and musb->isr if needed, * and activates clocks */ musb->isr = generic_interrupt; status = musb_platform_init(musb); if (status < 0) goto fail; if (!musb->isr) { status = -ENODEV; goto fail2; } #ifndef CONFIG_MUSB_PIO_ONLY if (use_dma && dev->dma_mask) { struct dma_controller *c; c = dma_controller_create(musb, musb->mregs); musb->dma_controller = c; if (c) (void) c->start(c); } #endif /* ideally this would be abstracted in platform setup */ if (!is_dma_capable() || !musb->dma_controller) dev->dma_mask = NULL; /* be sure interrupts are disabled before connecting ISR */ musb_platform_disable(musb); musb_generic_disable(musb); /* setup musb parts of the core (especially endpoints) */ status = musb_core_init(plat->config->multipoint ? MUSB_CONTROLLER_MHDRC : MUSB_CONTROLLER_HDRC, musb); if (status < 0) goto fail2; /* Init IRQ workqueue before request_irq */ INIT_WORK(&musb->irq_work, musb_irq_work); /* attach to the IRQ */ if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) { dev_err(dev, "request_irq %d failed!\n", nIrq); status = -ENODEV; goto fail2; } musb->nIrq = nIrq; /* FIXME this handles wakeup irqs wrong */ if (enable_irq_wake(nIrq) == 0) { musb->irq_wake = 1; device_init_wakeup(dev, 1); } else { musb->irq_wake = 0; } pr_info("%s: USB %s mode controller at %p using %s, IRQ %d\n", musb_driver_name, ({char *s; switch (musb->board_mode) { case MUSB_HOST: s = "Host"; break; case MUSB_PERIPHERAL: s = "Peripheral"; break; default: s = "OTG"; break; }; s; }), ctrl, (is_dma_capable() && musb->dma_controller) ? "DMA" : "PIO", musb->nIrq); #ifdef CONFIG_USB_MUSB_HDRC_HCD /* host side needs more setup, except for no-host modes */ if (musb->board_mode != MUSB_PERIPHERAL) { struct usb_hcd *hcd = musb_to_hcd(musb); if (musb->board_mode == MUSB_OTG) hcd->self.otg_port = 1; musb->xceiv.host = &hcd->self; hcd->power_budget = 2 * (plat->power ? : 250); } #endif /* CONFIG_USB_MUSB_HDRC_HCD */ /* For the host-only role, we can activate right away. * (We expect the ID pin to be forcibly grounded!!) * Otherwise, wait till the gadget driver hooks up. */ if (!is_otg_enabled(musb) && is_host_enabled(musb)) { MUSB_HST_MODE(musb); musb->xceiv.default_a = 1; musb->xceiv.state = OTG_STATE_A_IDLE; status = usb_add_hcd(musb_to_hcd(musb), -1, 0); if (status) goto fail; DBG(1, "%s mode, status %d, devctl %02x %c\n", "HOST", status, musb_readb(musb->mregs, MUSB_DEVCTL), (musb_readb(musb->mregs, MUSB_DEVCTL) & MUSB_DEVCTL_BDEVICE ? 'B' : 'A')); } else /* peripheral is enabled */ { MUSB_DEV_MODE(musb); musb->xceiv.default_a = 0; musb->xceiv.state = OTG_STATE_B_IDLE; status = musb_gadget_setup(musb); if (status) goto fail; DBG(1, "%s mode, status %d, dev%02x\n", is_otg_enabled(musb) ? "OTG" : "PERIPHERAL", status, musb_readb(musb->mregs, MUSB_DEVCTL)); } #ifdef CONFIG_SYSFS status = device_create_file(dev, &dev_attr_mode); status = device_create_file(dev, &dev_attr_vbus); #ifdef CONFIG_USB_GADGET_MUSB_HDRC status = device_create_file(dev, &dev_attr_srp); #endif /* CONFIG_USB_GADGET_MUSB_HDRC */ status = 0; #endif if (status) goto fail2; return 0; fail2: #ifdef CONFIG_SYSFS device_remove_file(musb->controller, &dev_attr_mode); device_remove_file(musb->controller, &dev_attr_vbus); #ifdef CONFIG_USB_MUSB_OTG device_remove_file(musb->controller, &dev_attr_srp); #endif #endif musb_platform_exit(musb); fail: dev_err(musb->controller, "musb_init_controller failed with status %d\n", status); if (musb->clock) clk_put(musb->clock); device_init_wakeup(dev, 0); musb_free(musb); return status; } /*-------------------------------------------------------------------------*/ /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just * bridge to a platform device; this driver then suffices. */ #ifndef CONFIG_MUSB_PIO_ONLY static u64 *orig_dma_mask; #endif static int __init musb_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; int irq = platform_get_irq(pdev, 0); struct resource *iomem; void __iomem *base; iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!iomem || irq == 0) return -ENODEV; base = ioremap(iomem->start, iomem->end - iomem->start + 1); if (!base) { dev_err(dev, "ioremap failed\n"); return -ENOMEM; } #ifndef CONFIG_MUSB_PIO_ONLY /* clobbered by use_dma=n */ orig_dma_mask = dev->dma_mask; #endif return musb_init_controller(dev, irq, base); } static int __devexit musb_remove(struct platform_device *pdev) { struct musb *musb = dev_to_musb(&pdev->dev); void __iomem *ctrl_base = musb->ctrl_base; /* this gets called on rmmod. * - Host mode: host may still be active * - Peripheral mode: peripheral is deactivated (or never-activated) * - OTG mode: both roles are deactivated (or never-activated) */ musb_shutdown(pdev); #ifdef CONFIG_USB_MUSB_HDRC_HCD if (musb->board_mode == MUSB_HOST) usb_remove_hcd(musb_to_hcd(musb)); #endif musb_free(musb); iounmap(ctrl_base); device_init_wakeup(&pdev->dev, 0); #ifndef CONFIG_MUSB_PIO_ONLY pdev->dev.dma_mask = orig_dma_mask; #endif return 0; } #ifdef CONFIG_PM static int musb_suspend(struct platform_device *pdev, pm_message_t message) { unsigned long flags; struct musb *musb = dev_to_musb(&pdev->dev); if (!musb->clock) return 0; spin_lock_irqsave(&musb->lock, flags); if (is_peripheral_active(musb)) { /* FIXME force disconnect unless we know USB will wake * the system up quickly enough to respond ... */ } else if (is_host_active(musb)) { /* we know all the children are suspended; sometimes * they will even be wakeup-enabled. */ } if (musb->set_clock) musb->set_clock(musb->clock, 0); else clk_disable(musb->clock); spin_unlock_irqrestore(&musb->lock, flags); return 0; } static int musb_resume(struct platform_device *pdev) { unsigned long flags; struct musb *musb = dev_to_musb(&pdev->dev); if (!musb->clock) return 0; spin_lock_irqsave(&musb->lock, flags); if (musb->set_clock) musb->set_clock(musb->clock, 1); else clk_enable(musb->clock); /* for static cmos like DaVinci, register values were preserved * unless for some reason the whole soc powered down and we're * not treating that as a whole-system restart (e.g. swsusp) */ spin_unlock_irqrestore(&musb->lock, flags); return 0; } #else #define musb_suspend NULL #define musb_resume NULL #endif static struct platform_driver musb_driver = { .driver = { .name = (char *)musb_driver_name, .bus = &platform_bus_type, .owner = THIS_MODULE, }, .remove = __devexit_p(musb_remove), .shutdown = musb_shutdown, .suspend = musb_suspend, .resume = musb_resume, }; /*-------------------------------------------------------------------------*/ static int __init musb_init(void) { #ifdef CONFIG_USB_MUSB_HDRC_HCD if (usb_disabled()) return 0; #endif pr_info("%s: version " MUSB_VERSION ", " #ifdef CONFIG_MUSB_PIO_ONLY "pio" #elif defined(CONFIG_USB_TI_CPPI_DMA) "cppi-dma" #elif defined(CONFIG_USB_INVENTRA_DMA) "musb-dma" #elif defined(CONFIG_USB_TUSB_OMAP_DMA) "tusb-omap-dma" #else "?dma?" #endif ", " #ifdef CONFIG_USB_MUSB_OTG "otg (peripheral+host)" #elif defined(CONFIG_USB_GADGET_MUSB_HDRC) "peripheral" #elif defined(CONFIG_USB_MUSB_HDRC_HCD) "host" #endif ", debug=%d\n", musb_driver_name, musb_debug); return platform_driver_probe(&musb_driver, musb_probe); } /* make us init after usbcore and i2c (transceivers, regulators, etc) * and before usb gadget and host-side drivers start to register */ fs_initcall(musb_init); static void __exit musb_cleanup(void) { platform_driver_unregister(&musb_driver); } module_exit(musb_cleanup);