From 237e75bf1e558f7330f8deb167fa3116405bef2c Mon Sep 17 00:00:00 2001 From: Jonathan McDowell Date: Thu, 26 Mar 2009 00:45:27 -0700 Subject: usb gadget: fix ethernet link reports to ethtool The g_ether USB gadget driver currently decides whether or not there's a link to report back for eth_get_link based on if the USB link speed is set. The USB gadget speed is however often set even before the device is enumerated. It seems more sensible to only report a "link" if we're actually connected to a host that wants to talk to us. The patch below does this for me - tested with the PXA27x UDC driver. Signed-off-by: Jonathan McDowell Signed-off-by: David Brownell Cc: stable Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/gadget/u_ether.c b/drivers/usb/gadget/u_ether.c index 96d65ca..4007770 100644 --- a/drivers/usb/gadget/u_ether.c +++ b/drivers/usb/gadget/u_ether.c @@ -175,12 +175,6 @@ static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p) strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof p->bus_info); } -static u32 eth_get_link(struct net_device *net) -{ - struct eth_dev *dev = netdev_priv(net); - return dev->gadget->speed != USB_SPEED_UNKNOWN; -} - /* REVISIT can also support: * - WOL (by tracking suspends and issuing remote wakeup) * - msglevel (implies updated messaging) @@ -189,7 +183,7 @@ static u32 eth_get_link(struct net_device *net) static struct ethtool_ops ops = { .get_drvinfo = eth_get_drvinfo, - .get_link = eth_get_link + .get_link = ethtool_op_get_link, }; static void defer_kevent(struct eth_dev *dev, int flag) -- cgit v0.10.2 From ae27d84351f1f3568118318a8c40ff3a154bd629 Mon Sep 17 00:00:00 2001 From: Peter Korsgaard Date: Wed, 25 Mar 2009 11:32:59 +0100 Subject: USB: ftdi_sio: add vendor/project id for JETI specbos 1201 spectrometer Signed-off-by: Peter Korsgaard Cc: stable Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index dcc87aa..8100f1d 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -668,6 +668,7 @@ static struct usb_device_id id_table_combined [] = { { USB_DEVICE(DE_VID, WHT_PID) }, { USB_DEVICE(ADI_VID, ADI_GNICE_PID), .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk }, + { USB_DEVICE(JETI_VID, JETI_SPC1201_PID) }, { }, /* Optional parameter entry */ { } /* Terminating entry */ }; diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h index daaf63d..c09f658 100644 --- a/drivers/usb/serial/ftdi_sio.h +++ b/drivers/usb/serial/ftdi_sio.h @@ -913,6 +913,13 @@ #define ADI_GNICE_PID 0xF000 /* + * JETI SPECTROMETER SPECBOS 1201 + * http://www.jeti.com/products/sys/scb/scb1201.php + */ +#define JETI_VID 0x0c6c +#define JETI_SPC1201_PID 0x04b2 + +/* * BmRequestType: 1100 0000b * bRequest: FTDI_E2_READ * wValue: 0 -- cgit v0.10.2 From c00deaa542100a697acb5be200b9f54317c1cf69 Mon Sep 17 00:00:00 2001 From: Pascal Terjan Date: Tue, 7 Apr 2009 14:40:42 +0200 Subject: USB: option: Add ids for D-Link DWM-652 3.5G modem This patch allows D-Link DWM-652 3.5G modem to work. It is an express card but was only tested with the provided usb adapter as I don't have machines with express card connector. /dev/ttyUSB{0,1,2} get created, and using comgt on ttyUSB1 works fine : [root@plop tmp]# comgt -d /dev/ttyUSB1 -e Enter PIN number: XXXX Waiting for Registration..(120 sec max). Registered on Home network: "Orange France",2 Signal Quality: 15,99 From: Pascal Terjan Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c index d560c0b..47bd070 100644 --- a/drivers/usb/serial/option.c +++ b/drivers/usb/serial/option.c @@ -300,6 +300,10 @@ static int option_resume(struct usb_serial *serial); #define BENQ_VENDOR_ID 0x04a5 #define BENQ_PRODUCT_H10 0x4068 +#define DLINK_VENDOR_ID 0x1186 +#define DLINK_PRODUCT_DWM_652 0x3e04 + + static struct usb_device_id option_ids[] = { { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) }, { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) }, @@ -516,6 +520,7 @@ static struct usb_device_id option_ids[] = { { USB_DEVICE(ZTE_VENDOR_ID, ZTE_PRODUCT_MF628) }, { USB_DEVICE(ZTE_VENDOR_ID, ZTE_PRODUCT_CDMA_TECH) }, { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_H10) }, + { USB_DEVICE(DLINK_VENDOR_ID, DLINK_PRODUCT_DWM_652) }, { USB_DEVICE(0x1da5, 0x4515) }, /* BenQ H20 */ { } /* Terminating entry */ }; diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h index 1c1f643..6ff2b28 100644 --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -1376,6 +1376,14 @@ UNUSUAL_DEV( 0x10d6, 0x2200, 0x0100, 0x0100, US_SC_DEVICE, US_PR_DEVICE, NULL, 0), +/* Reported by Pascal Terjan + * Ignore driver CD mode and force into modem mode by default. + */ +UNUSUAL_DEV( 0x1186, 0x3e04, 0x0000, 0x0000, + "D-Link", + "USB Mass Storage", + US_SC_DEVICE, US_PR_DEVICE, option_ms_init, 0), + /* Reported by Kevin Lloyd * Entry is needed for the initializer function override, * which instructs the device to load as a modem -- cgit v0.10.2 From f05932c0caf40c43af8a2c21adf7c46a00c436c4 Mon Sep 17 00:00:00 2001 From: Matthew Garrett Date: Sat, 4 Apr 2009 17:24:24 +0100 Subject: USB: qcserial: Add extra device IDs Add a set of device IDs from the Windows drivers. These aren't complete (there's a couple of cases where a QDL device is identified without the associated modem being identified), but it's better than the current situation. Signed-off-by: Matthew Garrett Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c index e6d6b0c..7528b8d 100644 --- a/drivers/usb/serial/qcserial.c +++ b/drivers/usb/serial/qcserial.c @@ -26,6 +26,27 @@ static struct usb_device_id id_table[] = { {USB_DEVICE(0x05c6, 0x9212)}, /* Acer Gobi Modem Device */ {USB_DEVICE(0x03f0, 0x1f1d)}, /* HP un2400 Gobi Modem Device */ {USB_DEVICE(0x03f0, 0x201d)}, /* HP un2400 Gobi QDL Device */ + {USB_DEVICE(0x04da, 0x250d)}, /* Panasonic Gobi Modem device */ + {USB_DEVICE(0x04da, 0x250c)}, /* Panasonic Gobi QDL device */ + {USB_DEVICE(0x413c, 0x8172)}, /* Dell Gobi Modem device */ + {USB_DEVICE(0x413c, 0x8171)}, /* Dell Gobi QDL device */ + {USB_DEVICE(0x1410, 0xa001)}, /* Novatel Gobi Modem device */ + {USB_DEVICE(0x1410, 0xa008)}, /* Novatel Gobi QDL device */ + {USB_DEVICE(0x0b05, 0x1776)}, /* Asus Gobi Modem device */ + {USB_DEVICE(0x0b05, 0x1774)}, /* Asus Gobi QDL device */ + {USB_DEVICE(0x19d2, 0xfff3)}, /* ONDA Gobi Modem device */ + {USB_DEVICE(0x19d2, 0xfff2)}, /* ONDA Gobi QDL device */ + {USB_DEVICE(0x1557, 0x0a80)}, /* OQO Gobi QDL device */ + {USB_DEVICE(0x05c6, 0x9001)}, /* Generic Gobi Modem device */ + {USB_DEVICE(0x05c6, 0x9002)}, /* Generic Gobi Modem device */ + {USB_DEVICE(0x05c6, 0x9202)}, /* Generic Gobi Modem device */ + {USB_DEVICE(0x05c6, 0x9203)}, /* Generic Gobi Modem device */ + {USB_DEVICE(0x05c6, 0x9222)}, /* Generic Gobi Modem device */ + {USB_DEVICE(0x05c6, 0x9008)}, /* Generic Gobi QDL device */ + {USB_DEVICE(0x05c6, 0x9201)}, /* Generic Gobi QDL device */ + {USB_DEVICE(0x05c6, 0x9221)}, /* Generic Gobi QDL device */ + {USB_DEVICE(0x05c6, 0x9231)}, /* Generic Gobi QDL device */ + {USB_DEVICE(0x1f45, 0x0001)}, /* Unknown Gobi QDL device */ { } /* Terminating entry */ }; MODULE_DEVICE_TABLE(usb, id_table); -- cgit v0.10.2 From e13c594f3a1fc2c78e7a20d1a07974f71e4b448f Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Sat, 4 Apr 2009 09:25:15 +0200 Subject: USB: fix oops in cdc-wdm in case of malformed descriptors cdc-wdm needs to ignore extremely malformed descriptors. Signed-off-by: Oliver Neukum Cc: stable Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c index 3771d6e..34e6108 100644 --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -652,7 +652,7 @@ next_desc: iface = &intf->altsetting[0]; ep = &iface->endpoint[0].desc; - if (!usb_endpoint_is_int_in(ep)) { + if (!ep || !usb_endpoint_is_int_in(ep)) { rv = -EINVAL; goto err; } -- cgit v0.10.2 From 74bb35083d889c696a0f54be76ffe85a66dcbdc1 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Thu, 26 Mar 2009 17:36:57 -0700 Subject: USB: musb_host, minor enqueue locking fix (v2) Someone noted that the enqueue path used an unlocked access for usb_host_endpoint->hcpriv ... fix that, by being safe and always accessing it under spinlock protection. Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 499c431..ff09595 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -1841,7 +1841,7 @@ static int musb_urb_enqueue( unsigned long flags; struct musb *musb = hcd_to_musb(hcd); struct usb_host_endpoint *hep = urb->ep; - struct musb_qh *qh = hep->hcpriv; + struct musb_qh *qh; struct usb_endpoint_descriptor *epd = &hep->desc; int ret; unsigned type_reg; @@ -1853,22 +1853,21 @@ static int musb_urb_enqueue( spin_lock_irqsave(&musb->lock, flags); ret = usb_hcd_link_urb_to_ep(hcd, urb); + qh = ret ? NULL : hep->hcpriv; + if (qh) + urb->hcpriv = qh; spin_unlock_irqrestore(&musb->lock, flags); - if (ret) - return ret; /* DMA mapping was already done, if needed, and this urb is on - * hep->urb_list ... so there's little to do unless hep wasn't - * yet scheduled onto a live qh. + * hep->urb_list now ... so we're done, unless hep wasn't yet + * scheduled onto a live qh. * * REVISIT best to keep hep->hcpriv valid until the endpoint gets * disabled, testing for empty qh->ring and avoiding qh setup costs * except for the first urb queued after a config change. */ - if (qh) { - urb->hcpriv = qh; - return 0; - } + if (qh || ret) + return ret; /* Allocate and initialize qh, minimizing the work done each time * hw_ep gets reprogrammed, or with irqs blocked. Then schedule it. -- cgit v0.10.2 From e4813eec8d47c8299d968bd5349dc881fa481c26 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 24 Mar 2009 10:39:13 -0400 Subject: USB: usb-storage: augment unusual_devs entry for Simple Tech/Datafab This patch (as1227) adds the MAX_SECTORS_64 flag to the unusual_devs entry for the Simple Tech/Datafab controller. This fixes Bugzilla #12882. Signed-off-by: Alan Stern Reported-and-tested-by: binbin Cc: stable Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h index 6ff2b28..96db479 100644 --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -975,12 +975,14 @@ UNUSUAL_DEV( 0x07c4, 0xa400, 0x0000, 0xffff, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_INQUIRY | US_FL_FIX_CAPACITY ), -/* Reported by Rauch Wolke */ +/* Reported by Rauch Wolke + * and augmented by binbin (Bugzilla #12882) + */ UNUSUAL_DEV( 0x07c4, 0xa4a5, 0x0000, 0xffff, "Simple Tech/Datafab", "CF+SM Reader", US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_IGNORE_RESIDUE ), + US_FL_IGNORE_RESIDUE | US_FL_MAX_SECTORS_64 ), /* Casio QV 2x00/3x00/4000/8000 digital still cameras are not conformant * to the USB storage specification in two ways: -- cgit v0.10.2 From 78322c1a64387673f46afb8b5e31edec94e9603d Mon Sep 17 00:00:00 2001 From: David Brownell Date: Thu, 26 Mar 2009 17:38:30 -0700 Subject: USB: musb_host, fix ep0 fifo flushing The MUSB host side can't share generic TX FIFO flush logic with EP0; the EP0 TX status register bits are different from those for other entpoints. Resolve this issue by providing a new EP0-specific routine to flush and reset the FIFO, which pays careful attention to restrictions listed in the latest programmer's guide. This gets rid of an open issue whereby the usbtest control write test (#14) failed. Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index ff09595..521fd83 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -125,6 +125,29 @@ static void musb_h_tx_flush_fifo(struct musb_hw_ep *ep) } } +static void musb_h_ep0_flush_fifo(struct musb_hw_ep *ep) +{ + void __iomem *epio = ep->regs; + u16 csr; + int retries = 5; + + /* scrub any data left in the fifo */ + do { + csr = musb_readw(epio, MUSB_TXCSR); + if (!(csr & (MUSB_CSR0_TXPKTRDY | MUSB_CSR0_RXPKTRDY))) + break; + musb_writew(epio, MUSB_TXCSR, MUSB_CSR0_FLUSHFIFO); + csr = musb_readw(epio, MUSB_TXCSR); + udelay(10); + } while (--retries); + + WARN(!retries, "Could not flush host TX%d fifo: csr: %04x\n", + ep->epnum, csr); + + /* and reset for the next transfer */ + musb_writew(epio, MUSB_TXCSR, 0); +} + /* * Start transmit. Caller is responsible for locking shared resources. * musb must be locked. @@ -694,10 +717,7 @@ static void musb_ep_program(struct musb *musb, u8 epnum, csr = musb_readw(epio, MUSB_TXCSR); } else { /* endpoint 0: just flush */ - musb_writew(epio, MUSB_CSR0, - csr | MUSB_CSR0_FLUSHFIFO); - musb_writew(epio, MUSB_CSR0, - csr | MUSB_CSR0_FLUSHFIFO); + musb_h_ep0_flush_fifo(hw_ep); } /* target addr and (for multipoint) hub addr/port */ @@ -1063,11 +1083,7 @@ irqreturn_t musb_h_ep0_irq(struct musb *musb) csr &= ~MUSB_CSR0_H_NAKTIMEOUT; musb_writew(epio, MUSB_CSR0, csr); } else { - csr |= MUSB_CSR0_FLUSHFIFO; - musb_writew(epio, MUSB_CSR0, csr); - musb_writew(epio, MUSB_CSR0, csr); - csr &= ~MUSB_CSR0_H_NAKTIMEOUT; - musb_writew(epio, MUSB_CSR0, csr); + musb_h_ep0_flush_fifo(hw_ep); } musb_writeb(epio, MUSB_NAKLIMIT0, 0); @@ -1081,10 +1097,7 @@ irqreturn_t musb_h_ep0_irq(struct musb *musb) * SHOULD NEVER HAPPEN! */ ERR("no URB for end 0\n"); - musb_writew(epio, MUSB_CSR0, MUSB_CSR0_FLUSHFIFO); - musb_writew(epio, MUSB_CSR0, MUSB_CSR0_FLUSHFIFO); - musb_writew(epio, MUSB_CSR0, 0); - + musb_h_ep0_flush_fifo(hw_ep); goto done; } @@ -2043,7 +2056,7 @@ static int musb_cleanup_urb(struct urb *urb, struct musb_qh *qh, int is_in) * endpoint's irq status here to avoid bogus irqs. * clearing that status is platform-specific... */ - } else { + } else if (ep->epnum) { musb_h_tx_flush_fifo(ep); csr = musb_readw(epio, MUSB_TXCSR); csr &= ~(MUSB_TXCSR_AUTOSET @@ -2057,6 +2070,8 @@ static int musb_cleanup_urb(struct urb *urb, struct musb_qh *qh, int is_in) musb_writew(epio, MUSB_TXCSR, csr); /* flush cpu writebuffer */ csr = musb_readw(epio, MUSB_TXCSR); + } else { + musb_h_ep0_flush_fifo(ep); } if (status == 0) musb_advance_schedule(ep->musb, urb, ep, is_in); -- cgit v0.10.2 From c7bbc056a92476b3b3d70a8df7cc746ac5d56de7 Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Thu, 26 Mar 2009 18:26:40 -0700 Subject: USB: musb: bugfixes for multi-packet TXDMA support We really want to use DMA mode 1 for all multi-packet transfers; that's one IRQ on DMA completion, instead of one per packet. There is an important issue with such transfers, especially on the host side: when such transfers end with a full-size packet, we must defer musb_dma_completion() calls until the FIFO empties. Else we report URB completions too soon, and may clobber data in the FIFO fifo when writing the next packet (losing data). The Inventra DMA support uses DMA mode 1, but it ignores that issue. The CPPI DMA support uses mode 0, but doesn't handle its TXPKTRDY interrupts quite right either; it can get stale "packet ready" interrupts, and report transfer completion too early using slightly different code paths, also losing data. So I'm solving it in a generic way -- by adding a sort of the "interrupt filter" into musb_host_tx(), catching these cases where a DMA completion IRQ doesn't suffice and removing some needlessly controller-specific logic. When a TXDMA interrupt happens and DMA request mode 1 is active, that filter resets to mode 0 and defers URB completion processing until TXPKTRDY, unless the FIFO is already empty. Related filtering logic in Inventra and CPPI code gets removed. Since it should be competely safe now to use the DMA request mode 1 for host side transfers with the CPPI DMA controller, set it in musb_h_tx_dma_start() ... now renamed (and shared). [ dbrownell@users.sourceforge.net: don't introduce more CamElCase; use more concise explanations ] Signed-off-by: Sergei Shtylyov Cc: Felipe Balbi Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c index 569ef0f..30e2489 100644 --- a/drivers/usb/musb/cppi_dma.c +++ b/drivers/usb/musb/cppi_dma.c @@ -1228,27 +1228,7 @@ void cppi_completion(struct musb *musb, u32 rx, u32 tx) hw_ep = tx_ch->hw_ep; - /* Peripheral role never repurposes the - * endpoint, so immediate completion is - * safe. Host role waits for the fifo - * to empty (TXPKTRDY irq) before going - * to the next queued bulk transfer. - */ - if (is_host_active(cppi->musb)) { -#if 0 - /* WORKAROUND because we may - * not always get TXKPTRDY ... - */ - int csr; - - csr = musb_readw(hw_ep->regs, - MUSB_TXCSR); - if (csr & MUSB_TXCSR_TXPKTRDY) -#endif - completed = false; - } - if (completed) - musb_dma_completion(musb, index + 1, 1); + musb_dma_completion(musb, index + 1, 1); } else { /* Bigger transfer than we could fit in diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 521fd83..518abfc 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -4,6 +4,7 @@ * Copyright 2005 Mentor Graphics Corporation * Copyright (C) 2005-2006 by Texas Instruments * Copyright (C) 2006-2007 Nokia Corporation + * Copyright (C) 2008-2009 MontaVista Software, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -168,13 +169,15 @@ static inline void musb_h_tx_start(struct musb_hw_ep *ep) } -static inline void cppi_host_txdma_start(struct musb_hw_ep *ep) +static inline void musb_h_tx_dma_start(struct musb_hw_ep *ep) { u16 txcsr; /* NOTE: no locks here; caller should lock and select EP */ txcsr = musb_readw(ep->regs, MUSB_TXCSR); txcsr |= MUSB_TXCSR_DMAENAB | MUSB_TXCSR_H_WZC_BITS; + if (is_cppi_enabled()) + txcsr |= MUSB_TXCSR_DMAMODE; musb_writew(ep->regs, MUSB_TXCSR, txcsr); } @@ -279,7 +282,7 @@ start: if (!hw_ep->tx_channel) musb_h_tx_start(hw_ep); else if (is_cppi_enabled() || tusb_dma_omap()) - cppi_host_txdma_start(hw_ep); + musb_h_tx_dma_start(hw_ep); } } @@ -1250,6 +1253,67 @@ void musb_host_tx(struct musb *musb, u8 epnum) } + if (is_dma_capable() && dma && !status) { + /* + * DMA has completed. But if we're using DMA mode 1 (multi + * packet DMA), we need a terminal TXPKTRDY interrupt before + * we can consider this transfer completed, lest we trash + * its last packet when writing the next URB's data. So we + * switch back to mode 0 to get that interrupt; we'll come + * back here once it happens. + */ + if (tx_csr & MUSB_TXCSR_DMAMODE) { + /* + * We shouldn't clear DMAMODE with DMAENAB set; so + * clear them in a safe order. That should be OK + * once TXPKTRDY has been set (and I've never seen + * it being 0 at this moment -- DMA interrupt latency + * is significant) but if it hasn't been then we have + * no choice but to stop being polite and ignore the + * programmer's guide... :-) + * + * Note that we must write TXCSR with TXPKTRDY cleared + * in order not to re-trigger the packet send (this bit + * can't be cleared by CPU), and there's another caveat: + * TXPKTRDY may be set shortly and then cleared in the + * double-buffered FIFO mode, so we do an extra TXCSR + * read for debouncing... + */ + tx_csr &= musb_readw(epio, MUSB_TXCSR); + if (tx_csr & MUSB_TXCSR_TXPKTRDY) { + tx_csr &= ~(MUSB_TXCSR_DMAENAB | + MUSB_TXCSR_TXPKTRDY); + musb_writew(epio, MUSB_TXCSR, + tx_csr | MUSB_TXCSR_H_WZC_BITS); + } + tx_csr &= ~(MUSB_TXCSR_DMAMODE | + MUSB_TXCSR_TXPKTRDY); + musb_writew(epio, MUSB_TXCSR, + tx_csr | MUSB_TXCSR_H_WZC_BITS); + + /* + * There is no guarantee that we'll get an interrupt + * after clearing DMAMODE as we might have done this + * too late (after TXPKTRDY was cleared by controller). + * Re-read TXCSR as we have spoiled its previous value. + */ + tx_csr = musb_readw(epio, MUSB_TXCSR); + } + + /* + * We may get here from a DMA completion or TXPKTRDY interrupt. + * In any case, we must check the FIFO status here and bail out + * only if the FIFO still has data -- that should prevent the + * "missed" TXPKTRDY interrupts and deal with double-buffered + * FIFO mode too... + */ + if (tx_csr & (MUSB_TXCSR_FIFONOTEMPTY | MUSB_TXCSR_TXPKTRDY)) { + DBG(2, "DMA complete but packet still in FIFO, " + "CSR %04x\n", tx_csr); + return; + } + } + /* REVISIT this looks wrong... */ if (!status || dma || usb_pipeisoc(pipe)) { if (dma) diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index 8662e9e..de0e242 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -304,12 +304,9 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data) musb_channel->epnum, MUSB_TXCSR), MUSB_TXCSR_TXPKTRDY); - } else { - musb_dma_completion( - musb, - musb_channel->epnum, - musb_channel->transmit); } + musb_dma_completion(musb, musb_channel->epnum, + musb_channel->transmit); } } } -- cgit v0.10.2 From b6e434a5404b9ce8c285ea081b6ea5c523b29db4 Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Thu, 26 Mar 2009 18:27:47 -0700 Subject: USB: musb: sanitize clearing TXCSR DMA bits (take 2) The MUSB code clears TXCSR_DMAMODE incorrectly in several places, either asserting that TXCSR_DMAENAB is clear (when sometimes it isn't) or clearing both bits together. Recent versions of the programmer's guide require DMAENAB to be cleared first, although some older ones didn't. Fix this and while at it: - In musb_gadget::txstate(), stop clearing the AUTOSET and DMAMODE bits for the CPPI case since they never get set anyway (the former bit is reserved on DaVinci); but do clear the DMAENAB bit on the DMA error path. - In musb_host::musb_ep_program(), remove the duplicate DMA controller specific code code clearing the TXCSR previous state, add the code to clear TXCSR DMA bits on the Inventra DMA error path, to replace such code (executed late) on the PIO path. - In musbhsdma::dma_channel_abort()/dma_controller_irq(), add/use the 'offset' variable to avoid MUSB_EP_OFFSET() invocations on every RXCSR/TXCSR access. [dbrownell@users.sourceforge.net: don't introduce CamelCase, shrink diff] Signed-off-by: Sergei Shtylyov Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index c7ebd08..f79440c 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -165,9 +165,15 @@ static void nuke(struct musb_ep *ep, const int status) if (is_dma_capable() && ep->dma) { struct dma_controller *c = ep->musb->dma_controller; int value; + if (ep->is_in) { + /* + * The programming guide says that we must not clear + * the DMAMODE bit before DMAENAB, so we only + * clear it in the second write... + */ musb_writew(epio, MUSB_TXCSR, - 0 | MUSB_TXCSR_FLUSHFIFO); + MUSB_TXCSR_DMAMODE | MUSB_TXCSR_FLUSHFIFO); musb_writew(epio, MUSB_TXCSR, 0 | MUSB_TXCSR_FLUSHFIFO); } else { @@ -230,7 +236,7 @@ static inline int max_ep_writesize(struct musb *musb, struct musb_ep *ep) | IN token(s) are recd from Host. | -> DMA interrupt on completion | calls TxAvail. - | -> stop DMA, ~DmaEenab, + | -> stop DMA, ~DMAENAB, | -> set TxPktRdy for last short pkt or zlp | -> Complete Request | -> Continue next request (call txstate) @@ -315,9 +321,17 @@ static void txstate(struct musb *musb, struct musb_request *req) request->dma, request_size); if (use_dma) { if (musb_ep->dma->desired_mode == 0) { - /* ASSERT: DMAENAB is clear */ - csr &= ~(MUSB_TXCSR_AUTOSET | - MUSB_TXCSR_DMAMODE); + /* + * We must not clear the DMAMODE bit + * before the DMAENAB bit -- and the + * latter doesn't always get cleared + * before we get here... + */ + csr &= ~(MUSB_TXCSR_AUTOSET + | MUSB_TXCSR_DMAENAB); + musb_writew(epio, MUSB_TXCSR, csr + | MUSB_TXCSR_P_WZC_BITS); + csr &= ~MUSB_TXCSR_DMAMODE; csr |= (MUSB_TXCSR_DMAENAB | MUSB_TXCSR_MODE); /* against programming guide */ @@ -334,10 +348,7 @@ static void txstate(struct musb *musb, struct musb_request *req) #elif defined(CONFIG_USB_TI_CPPI_DMA) /* program endpoint CSR first, then setup DMA */ - csr &= ~(MUSB_TXCSR_AUTOSET - | MUSB_TXCSR_DMAMODE - | MUSB_TXCSR_P_UNDERRUN - | MUSB_TXCSR_TXPKTRDY); + csr &= ~(MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_TXPKTRDY); csr |= MUSB_TXCSR_MODE | MUSB_TXCSR_DMAENAB; musb_writew(epio, MUSB_TXCSR, (MUSB_TXCSR_P_WZC_BITS & ~MUSB_TXCSR_P_UNDERRUN) @@ -364,8 +375,8 @@ static void txstate(struct musb *musb, struct musb_request *req) if (!use_dma) { c->channel_release(musb_ep->dma); musb_ep->dma = NULL; - /* ASSERT: DMAENAB clear */ - csr &= ~(MUSB_TXCSR_DMAMODE | MUSB_TXCSR_MODE); + csr &= ~MUSB_TXCSR_DMAENAB; + musb_writew(epio, MUSB_TXCSR, csr); /* invariant: prequest->buf is non-null */ } #elif defined(CONFIG_USB_TUSB_OMAP_DMA) diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 518abfc..1dfaaa6 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -593,10 +593,17 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep) csr = musb_readw(ep->regs, MUSB_TXCSR); if (csr & MUSB_TXCSR_MODE) { musb_h_tx_flush_fifo(ep); + csr = musb_readw(ep->regs, MUSB_TXCSR); musb_writew(ep->regs, MUSB_TXCSR, - MUSB_TXCSR_FRCDATATOG); + csr | MUSB_TXCSR_FRCDATATOG); } - /* clear mode (and everything else) to enable Rx */ + + /* + * Clear the MODE bit (and everything else) to enable Rx. + * NOTE: we mustn't clear the DMAMODE bit before DMAENAB. + */ + if (csr & MUSB_TXCSR_DMAMODE) + musb_writew(ep->regs, MUSB_TXCSR, MUSB_TXCSR_DMAMODE); musb_writew(ep->regs, MUSB_TXCSR, 0); /* scrub all previous state, clearing toggle */ @@ -693,12 +700,17 @@ static void musb_ep_program(struct musb *musb, u8 epnum, /* general endpoint setup */ if (epnum) { - /* ASSERT: TXCSR_DMAENAB was already cleared */ - /* flush all old state, set default */ musb_h_tx_flush_fifo(hw_ep); + + /* + * We must not clear the DMAMODE bit before or in + * the same cycle with the DMAENAB bit, so we clear + * the latter first... + */ csr &= ~(MUSB_TXCSR_H_NAKTIMEOUT - | MUSB_TXCSR_DMAMODE + | MUSB_TXCSR_AUTOSET + | MUSB_TXCSR_DMAENAB | MUSB_TXCSR_FRCDATATOG | MUSB_TXCSR_H_RXSTALL | MUSB_TXCSR_H_ERROR @@ -706,16 +718,15 @@ static void musb_ep_program(struct musb *musb, u8 epnum, ); csr |= MUSB_TXCSR_MODE; - if (usb_gettoggle(urb->dev, - qh->epnum, 1)) + if (usb_gettoggle(urb->dev, qh->epnum, 1)) csr |= MUSB_TXCSR_H_WR_DATATOGGLE | MUSB_TXCSR_H_DATATOGGLE; else csr |= MUSB_TXCSR_CLRDATATOG; - /* twice in case of double packet buffering */ musb_writew(epio, MUSB_TXCSR, csr); /* REVISIT may need to clear FLUSHFIFO ... */ + csr &= ~MUSB_TXCSR_DMAMODE; musb_writew(epio, MUSB_TXCSR, csr); csr = musb_readw(epio, MUSB_TXCSR); } else { @@ -759,34 +770,19 @@ static void musb_ep_program(struct musb *musb, u8 epnum, #ifdef CONFIG_USB_INVENTRA_DMA if (dma_channel) { - - /* clear previous state */ - csr = musb_readw(epio, MUSB_TXCSR); - csr &= ~(MUSB_TXCSR_AUTOSET - | MUSB_TXCSR_DMAMODE - | MUSB_TXCSR_DMAENAB); - csr |= MUSB_TXCSR_MODE; - musb_writew(epio, MUSB_TXCSR, - csr | MUSB_TXCSR_MODE); - qh->segsize = min(len, dma_channel->max_len); - if (qh->segsize <= packet_sz) dma_channel->desired_mode = 0; else dma_channel->desired_mode = 1; - if (dma_channel->desired_mode == 0) { - csr &= ~(MUSB_TXCSR_AUTOSET - | MUSB_TXCSR_DMAMODE); + /* Against the programming guide */ csr |= (MUSB_TXCSR_DMAENAB); - /* against programming guide */ } else csr |= (MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAENAB | MUSB_TXCSR_DMAMODE); - musb_writew(epio, MUSB_TXCSR, csr); dma_ok = dma_controller->channel_program( @@ -803,6 +799,17 @@ static void musb_ep_program(struct musb *musb, u8 epnum, else hw_ep->rx_channel = NULL; dma_channel = NULL; + + /* + * The programming guide says that we must + * clear the DMAENAB bit before DMAMODE... + */ + csr = musb_readw(epio, MUSB_TXCSR); + csr &= ~(MUSB_TXCSR_DMAENAB + | MUSB_TXCSR_AUTOSET); + musb_writew(epio, MUSB_TXCSR, csr); + csr &= ~MUSB_TXCSR_DMAMODE; + musb_writew(epio, MUSB_TXCSR, csr); } } #endif @@ -810,18 +817,7 @@ static void musb_ep_program(struct musb *musb, u8 epnum, /* candidate for DMA */ if ((is_cppi_enabled() || tusb_dma_omap()) && dma_channel) { - /* program endpoint CSRs first, then setup DMA. - * assume CPPI setup succeeds. - * defer enabling dma. - */ - csr = musb_readw(epio, MUSB_TXCSR); - csr &= ~(MUSB_TXCSR_AUTOSET - | MUSB_TXCSR_DMAMODE - | MUSB_TXCSR_DMAENAB); - csr |= MUSB_TXCSR_MODE; - musb_writew(epio, MUSB_TXCSR, - csr | MUSB_TXCSR_MODE); - + /* Defer enabling DMA */ dma_channel->actual_len = 0L; qh->segsize = len; @@ -850,20 +846,9 @@ static void musb_ep_program(struct musb *musb, u8 epnum, } if (load_count) { - /* ASSERT: TXCSR_DMAENAB was already cleared */ - /* PIO to load FIFO */ qh->segsize = load_count; musb_write_fifo(hw_ep, load_count, buf); - csr = musb_readw(epio, MUSB_TXCSR); - csr &= ~(MUSB_TXCSR_DMAENAB - | MUSB_TXCSR_DMAMODE - | MUSB_TXCSR_AUTOSET); - /* write CSR */ - csr |= MUSB_TXCSR_MODE; - - if (epnum) - musb_writew(epio, MUSB_TXCSR, csr); } /* re-enable interrupt */ diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index de0e242..5e83f96 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -195,30 +195,32 @@ static int dma_channel_abort(struct dma_channel *channel) void __iomem *mbase = musb_channel->controller->base; u8 bchannel = musb_channel->idx; + int offset; u16 csr; if (channel->status == MUSB_DMA_STATUS_BUSY) { if (musb_channel->transmit) { - - csr = musb_readw(mbase, - MUSB_EP_OFFSET(musb_channel->epnum, - MUSB_TXCSR)); - csr &= ~(MUSB_TXCSR_AUTOSET | - MUSB_TXCSR_DMAENAB | - MUSB_TXCSR_DMAMODE); - musb_writew(mbase, - MUSB_EP_OFFSET(musb_channel->epnum, MUSB_TXCSR), - csr); + offset = MUSB_EP_OFFSET(musb_channel->epnum, + MUSB_TXCSR); + + /* + * The programming guide says that we must clear + * the DMAENAB bit before the DMAMODE bit... + */ + csr = musb_readw(mbase, offset); + csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAENAB); + musb_writew(mbase, offset, csr); + csr &= ~MUSB_TXCSR_DMAMODE; + musb_writew(mbase, offset, csr); } else { - csr = musb_readw(mbase, - MUSB_EP_OFFSET(musb_channel->epnum, - MUSB_RXCSR)); + offset = MUSB_EP_OFFSET(musb_channel->epnum, + MUSB_RXCSR); + + csr = musb_readw(mbase, offset); csr &= ~(MUSB_RXCSR_AUTOCLEAR | MUSB_RXCSR_DMAENAB | MUSB_RXCSR_DMAMODE); - musb_writew(mbase, - MUSB_EP_OFFSET(musb_channel->epnum, MUSB_RXCSR), - csr); + musb_writew(mbase, offset, csr); } musb_writew(mbase, @@ -296,14 +298,25 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data) && ((channel->desired_mode == 0) || (channel->actual_len & (musb_channel->max_packet_sz - 1))) - ) { + ) { + u8 epnum = musb_channel->epnum; + int offset = MUSB_EP_OFFSET(epnum, + MUSB_TXCSR); + u16 txcsr; + + /* + * The programming guide says that we + * must clear DMAENAB before DMAMODE. + */ + musb_ep_select(mbase, epnum); + txcsr = musb_readw(mbase, offset); + txcsr &= ~(MUSB_TXCSR_DMAENAB + | MUSB_TXCSR_AUTOSET); + musb_writew(mbase, offset, txcsr); /* Send out the packet */ - musb_ep_select(mbase, - musb_channel->epnum); - musb_writew(mbase, MUSB_EP_OFFSET( - musb_channel->epnum, - MUSB_TXCSR), - MUSB_TXCSR_TXPKTRDY); + txcsr &= ~MUSB_TXCSR_DMAMODE; + txcsr |= MUSB_TXCSR_TXPKTRDY; + musb_writew(mbase, offset, txcsr); } musb_dma_completion(musb, musb_channel->epnum, musb_channel->transmit); -- cgit v0.10.2 From 6b6e97107f12f3a9f7b5b43a6c3b94409240bcff Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Thu, 26 Mar 2009 18:29:19 -0700 Subject: USB: musb: fix isochronous TXDMA (take 2) Multi-frame isochronous TX URBs transfers in DMA mode never complete with CPPI DMA because musb_host_tx() doesn't restart DMA on the second frame, only emitting a debug message. With Inventra DMA they complete, but in PIO mode. To fix: - Factor out programming of the DMA transfer from musb_ep_program() into musb_tx_dma_program(); - Reorder the code at the end of musb_host_tx() to facilitate the fallback to PIO iff DMA fails; - Handle the buffer offset consistently for both PIO and DMA modes; - Add an argument to musb_ep_program() for the same reason (it only worked correctly with non-zero offset of the first frame in PIO mode); - Set the completed isochronous frame descriptor's 'actual_length' and 'status' fields correctly in DMA mode. Also, since CPPI reportedly doesn't like sending isochronous packets in the RNDIS mode, change the criterion for this mode to be used only for multi-packet transfers. (There's no need for that mode in the single-packet case anyway.) [ dbrownell@users.sourceforge.net: split comment paragraph into bullet list, shrink patch delta, style tweaks ] Signed-off-by: Pavel Kiryukhin Signed-off-by: Sergei Shtylyov Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c index 30e2489..1976e9b 100644 --- a/drivers/usb/musb/cppi_dma.c +++ b/drivers/usb/musb/cppi_dma.c @@ -579,6 +579,7 @@ cppi_next_tx_segment(struct musb *musb, struct cppi_channel *tx) * trigger the "send a ZLP?" confusion. */ rndis = (maxpacket & 0x3f) == 0 + && length > maxpacket && length < 0xffff && (length % maxpacket) != 0; diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 1dfaaa6..db1b574 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -97,8 +97,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum, - struct urb *urb, unsigned int nOut, - u8 *buf, u32 len); + struct urb *urb, int is_out, + u8 *buf, u32 offset, u32 len); /* * Clear TX fifo. Needed to avoid BABBLE errors. @@ -192,9 +192,10 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh) { u16 frame; u32 len; - void *buf; void __iomem *mbase = musb->mregs; struct urb *urb = next_urb(qh); + void *buf = urb->transfer_buffer; + u32 offset = 0; struct musb_hw_ep *hw_ep = qh->hw_ep; unsigned pipe = urb->pipe; u8 address = usb_pipedevice(pipe); @@ -217,7 +218,7 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh) case USB_ENDPOINT_XFER_ISOC: qh->iso_idx = 0; qh->frame = 0; - buf = urb->transfer_buffer + urb->iso_frame_desc[0].offset; + offset = urb->iso_frame_desc[0].offset; len = urb->iso_frame_desc[0].length; break; default: /* bulk, interrupt */ @@ -235,14 +236,14 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh) case USB_ENDPOINT_XFER_ISOC: s = "-iso"; break; default: s = "-intr"; break; }; s; }), - epnum, buf, len); + epnum, buf + offset, len); /* Configure endpoint */ if (is_in || hw_ep->is_shared_fifo) hw_ep->in_qh = qh; else hw_ep->out_qh = qh; - musb_ep_program(musb, epnum, urb, !is_in, buf, len); + musb_ep_program(musb, epnum, urb, !is_in, buf, offset, len); /* transmit may have more work: start it when it is time */ if (is_in) @@ -253,7 +254,6 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh) case USB_ENDPOINT_XFER_ISOC: case USB_ENDPOINT_XFER_INT: DBG(3, "check whether there's still time for periodic Tx\n"); - qh->iso_idx = 0; frame = musb_readw(mbase, MUSB_FRAME); /* FIXME this doesn't implement that scheduling policy ... * or handle framecounter wrapping @@ -634,14 +634,68 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep) ep->rx_reinit = 0; } +static bool musb_tx_dma_program(struct dma_controller *dma, + struct musb_hw_ep *hw_ep, struct musb_qh *qh, + struct urb *urb, u32 offset, u32 length) +{ + struct dma_channel *channel = hw_ep->tx_channel; + void __iomem *epio = hw_ep->regs; + u16 pkt_size = qh->maxpacket; + u16 csr; + u8 mode; + +#ifdef CONFIG_USB_INVENTRA_DMA + if (length > channel->max_len) + length = channel->max_len; + + csr = musb_readw(epio, MUSB_TXCSR); + if (length > pkt_size) { + mode = 1; + csr |= MUSB_TXCSR_AUTOSET + | MUSB_TXCSR_DMAMODE + | MUSB_TXCSR_DMAENAB; + } else { + mode = 0; + csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAMODE); + csr |= MUSB_TXCSR_DMAENAB; /* against programmer's guide */ + } + channel->desired_mode = mode; + musb_writew(epio, MUSB_TXCSR, csr); +#else + if (!is_cppi_enabled() && !tusb_dma_omap()) + return false; + + channel->actual_len = 0; + + /* + * TX uses "RNDIS" mode automatically but needs help + * to identify the zero-length-final-packet case. + */ + mode = (urb->transfer_flags & URB_ZERO_PACKET) ? 1 : 0; +#endif + + qh->segsize = length; + + if (!dma->channel_program(channel, pkt_size, mode, + urb->transfer_dma + offset, length)) { + dma->channel_release(channel); + hw_ep->tx_channel = NULL; + + csr = musb_readw(epio, MUSB_TXCSR); + csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAENAB); + musb_writew(epio, MUSB_TXCSR, csr | MUSB_TXCSR_H_WZC_BITS); + return false; + } + return true; +} /* * Program an HDRC endpoint as per the given URB * Context: irqs blocked, controller lock held */ static void musb_ep_program(struct musb *musb, u8 epnum, - struct urb *urb, unsigned int is_out, - u8 *buf, u32 len) + struct urb *urb, int is_out, + u8 *buf, u32 offset, u32 len) { struct dma_controller *dma_controller; struct dma_channel *dma_channel; @@ -768,82 +822,9 @@ static void musb_ep_program(struct musb *musb, u8 epnum, else load_count = min((u32) packet_sz, len); -#ifdef CONFIG_USB_INVENTRA_DMA - if (dma_channel) { - qh->segsize = min(len, dma_channel->max_len); - if (qh->segsize <= packet_sz) - dma_channel->desired_mode = 0; - else - dma_channel->desired_mode = 1; - - if (dma_channel->desired_mode == 0) { - /* Against the programming guide */ - csr |= (MUSB_TXCSR_DMAENAB); - } else - csr |= (MUSB_TXCSR_AUTOSET - | MUSB_TXCSR_DMAENAB - | MUSB_TXCSR_DMAMODE); - musb_writew(epio, MUSB_TXCSR, csr); - - dma_ok = dma_controller->channel_program( - dma_channel, packet_sz, - dma_channel->desired_mode, - urb->transfer_dma, - qh->segsize); - if (dma_ok) { - load_count = 0; - } else { - dma_controller->channel_release(dma_channel); - if (is_out) - hw_ep->tx_channel = NULL; - else - hw_ep->rx_channel = NULL; - dma_channel = NULL; - - /* - * The programming guide says that we must - * clear the DMAENAB bit before DMAMODE... - */ - csr = musb_readw(epio, MUSB_TXCSR); - csr &= ~(MUSB_TXCSR_DMAENAB - | MUSB_TXCSR_AUTOSET); - musb_writew(epio, MUSB_TXCSR, csr); - csr &= ~MUSB_TXCSR_DMAMODE; - musb_writew(epio, MUSB_TXCSR, csr); - } - } -#endif - - /* candidate for DMA */ - if ((is_cppi_enabled() || tusb_dma_omap()) && dma_channel) { - - /* Defer enabling DMA */ - dma_channel->actual_len = 0L; - qh->segsize = len; - - /* TX uses "rndis" mode automatically, but needs help - * to identify the zero-length-final-packet case. - */ - dma_ok = dma_controller->channel_program( - dma_channel, packet_sz, - (urb->transfer_flags - & URB_ZERO_PACKET) - == URB_ZERO_PACKET, - urb->transfer_dma, - qh->segsize); - if (dma_ok) { - load_count = 0; - } else { - dma_controller->channel_release(dma_channel); - hw_ep->tx_channel = NULL; - dma_channel = NULL; - - /* REVISIT there's an error path here that - * needs handling: can't do dma, but - * there's no pio buffer address... - */ - } - } + if (dma_channel && musb_tx_dma_program(dma_controller, + hw_ep, qh, urb, offset, len)) + load_count = 0; if (load_count) { /* PIO to load FIFO */ @@ -903,7 +884,7 @@ static void musb_ep_program(struct musb *musb, u8 epnum, dma_channel, packet_sz, !(urb->transfer_flags & URB_SHORT_NOT_OK), - urb->transfer_dma, + urb->transfer_dma + offset, qh->segsize); if (!dma_ok) { dma_controller->channel_release( @@ -1146,8 +1127,8 @@ void musb_host_tx(struct musb *musb, u8 epnum) int pipe; bool done = false; u16 tx_csr; - size_t wLength = 0; - u8 *buf = NULL; + size_t length = 0; + size_t offset = 0; struct urb *urb; struct musb_hw_ep *hw_ep = musb->endpoints + epnum; void __iomem *epio = hw_ep->regs; @@ -1165,7 +1146,7 @@ void musb_host_tx(struct musb *musb, u8 epnum) /* with CPPI, DMA sometimes triggers "extra" irqs */ if (!urb) { DBG(4, "extra TX%d ready, csr %04x\n", epnum, tx_csr); - goto finish; + return; } pipe = urb->pipe; @@ -1202,7 +1183,7 @@ void musb_host_tx(struct musb *musb, u8 epnum) musb_writew(epio, MUSB_TXCSR, MUSB_TXCSR_H_WZC_BITS | MUSB_TXCSR_TXPKTRDY); - goto finish; + return; } if (status) { @@ -1234,8 +1215,7 @@ void musb_host_tx(struct musb *musb, u8 epnum) /* second cppi case */ if (dma_channel_status(dma) == MUSB_DMA_STATUS_BUSY) { DBG(4, "extra TX%d ready, csr %04x\n", epnum, tx_csr); - goto finish; - + return; } if (is_dma_capable() && dma && !status) { @@ -1299,25 +1279,25 @@ void musb_host_tx(struct musb *musb, u8 epnum) } } - /* REVISIT this looks wrong... */ if (!status || dma || usb_pipeisoc(pipe)) { if (dma) - wLength = dma->actual_len; + length = dma->actual_len; else - wLength = qh->segsize; - qh->offset += wLength; + length = qh->segsize; + qh->offset += length; if (usb_pipeisoc(pipe)) { struct usb_iso_packet_descriptor *d; d = urb->iso_frame_desc + qh->iso_idx; - d->actual_length = qh->segsize; + d->actual_length = length; + d->status = status; if (++qh->iso_idx >= urb->number_of_packets) { done = true; } else { d++; - buf = urb->transfer_buffer + d->offset; - wLength = d->length; + offset = d->offset; + length = d->length; } } else if (dma) { done = true; @@ -1330,10 +1310,8 @@ void musb_host_tx(struct musb *musb, u8 epnum) & URB_ZERO_PACKET)) done = true; if (!done) { - buf = urb->transfer_buffer - + qh->offset; - wLength = urb->transfer_buffer_length - - qh->offset; + offset = qh->offset; + length = urb->transfer_buffer_length - offset; } } } @@ -1352,28 +1330,31 @@ void musb_host_tx(struct musb *musb, u8 epnum) urb->status = status; urb->actual_length = qh->offset; musb_advance_schedule(musb, urb, hw_ep, USB_DIR_OUT); + return; + } else if (usb_pipeisoc(pipe) && dma) { + if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb, + offset, length)) + return; + } else if (tx_csr & MUSB_TXCSR_DMAENAB) { + DBG(1, "not complete, but DMA enabled?\n"); + return; + } - } else if (!(tx_csr & MUSB_TXCSR_DMAENAB)) { - /* WARN_ON(!buf); */ - - /* REVISIT: some docs say that when hw_ep->tx_double_buffered, - * (and presumably, fifo is not half-full) we should write TWO - * packets before updating TXCSR ... other docs disagree ... - */ - /* PIO: start next packet in this URB */ - if (wLength > qh->maxpacket) - wLength = qh->maxpacket; - musb_write_fifo(hw_ep, wLength, buf); - qh->segsize = wLength; - - musb_ep_select(mbase, epnum); - musb_writew(epio, MUSB_TXCSR, - MUSB_TXCSR_H_WZC_BITS | MUSB_TXCSR_TXPKTRDY); - } else - DBG(1, "not complete, but dma enabled?\n"); + /* + * PIO: start next packet in this URB. + * + * REVISIT: some docs say that when hw_ep->tx_double_buffered, + * (and presumably, FIFO is not half-full) we should write *two* + * packets before updating TXCSR; other docs disagree... + */ + if (length > qh->maxpacket) + length = qh->maxpacket; + musb_write_fifo(hw_ep, length, urb->transfer_buffer + offset); + qh->segsize = length; -finish: - return; + musb_ep_select(mbase, epnum); + musb_writew(epio, MUSB_TXCSR, + MUSB_TXCSR_H_WZC_BITS | MUSB_TXCSR_TXPKTRDY); } -- cgit v0.10.2 From 0ec8fd70fbd7327e1bf747c4a2f6b67efdf16618 Mon Sep 17 00:00:00 2001 From: Kim Kyuwon Date: Thu, 26 Mar 2009 18:56:51 -0700 Subject: USB: musb: fix possible panic while resuming During driver resume processing, musb could cause a kernel panic. Fix by enabling the clock earlier, with the resume_early method. Signed-off-by: Kim Kyuwon Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 338cd16..0112353 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -2170,26 +2170,22 @@ static int musb_suspend(struct platform_device *pdev, pm_message_t message) return 0; } -static int musb_resume(struct platform_device *pdev) +static int musb_resume_early(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) + * unless for some reason the whole soc powered down or the USB + * module got reset through the PSC (vs just being disabled). */ - spin_unlock_irqrestore(&musb->lock, flags); return 0; } @@ -2207,7 +2203,7 @@ static struct platform_driver musb_driver = { .remove = __devexit_p(musb_remove), .shutdown = musb_shutdown, .suspend = musb_suspend, - .resume = musb_resume, + .resume_early = musb_resume_early, }; /*-------------------------------------------------------------------------*/ -- cgit v0.10.2 From c7877e1983f051cc267e1ec8c232a02d23c0a82a Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 7 Apr 2009 11:56:32 -0700 Subject: Revert USB: usb-serial ch341: support for DTR/RTS/CTS Reverts commit 664d5df92e88b6ef091048a802b3750f4e989180 as the commit log information was not complete, and we didn't have a proper signed-off-by by the author of the original BSD code. Cc: Werner Cornelius Cc: Boris Hajduk Cc: Alan Cox Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index ab4cc27..d33d39d 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -1,7 +1,5 @@ /* * Copyright 2007, Frank A Kingswood - * Copyright 2007, Werner Cornelius - * Copyright 2009, Boris Hajduk * * ch341.c implements a serial port driver for the Winchiphead CH341. * @@ -23,39 +21,9 @@ #include #include -#define DEFAULT_BAUD_RATE 9600 +#define DEFAULT_BAUD_RATE 2400 #define DEFAULT_TIMEOUT 1000 -/* flags for IO-Bits */ -#define CH341_BIT_RTS (1 << 6) -#define CH341_BIT_DTR (1 << 5) - -/******************************/ -/* interrupt pipe definitions */ -/******************************/ -/* always 4 interrupt bytes */ -/* first irq byte normally 0x08 */ -/* second irq byte base 0x7d + below */ -/* third irq byte base 0x94 + below */ -/* fourth irq byte normally 0xee */ - -/* second interrupt byte */ -#define CH341_MULT_STAT 0x04 /* multiple status since last interrupt event */ - -/* status returned in third interrupt answer byte, inverted in data - from irq */ -#define CH341_BIT_CTS 0x01 -#define CH341_BIT_DSR 0x02 -#define CH341_BIT_RI 0x04 -#define CH341_BIT_DCD 0x08 -#define CH341_BITS_MODEM_STAT 0x0f /* all bits */ - -/*******************************/ -/* baudrate calculation factor */ -/*******************************/ -#define CH341_BAUDBASE_FACTOR 1532620800 -#define CH341_BAUDBASE_DIVMAX 3 - static int debug; static struct usb_device_id id_table [] = { @@ -66,12 +34,9 @@ static struct usb_device_id id_table [] = { MODULE_DEVICE_TABLE(usb, id_table); struct ch341_private { - spinlock_t lock; /* access lock */ - wait_queue_head_t delta_msr_wait; /* wait queue for modem status */ - unsigned baud_rate; /* set baud rate */ - u8 line_control; /* set line control value RTS/DTR */ - u8 line_status; /* active status of modem control inputs */ - u8 multi_status_change; /* status changed multiple since last call */ + unsigned baud_rate; + u8 dtr; + u8 rts; }; static int ch341_control_out(struct usb_device *dev, u8 request, @@ -107,28 +72,37 @@ static int ch341_set_baudrate(struct usb_device *dev, { short a, b; int r; - unsigned long factor; - short divisor; dbg("ch341_set_baudrate(%d)", priv->baud_rate); - - if (!priv->baud_rate) + switch (priv->baud_rate) { + case 2400: + a = 0xd901; + b = 0x0038; + break; + case 4800: + a = 0x6402; + b = 0x001f; + break; + case 9600: + a = 0xb202; + b = 0x0013; + break; + case 19200: + a = 0xd902; + b = 0x000d; + break; + case 38400: + a = 0x6403; + b = 0x000a; + break; + case 115200: + a = 0xcc03; + b = 0x0008; + break; + default: return -EINVAL; - factor = (CH341_BAUDBASE_FACTOR / priv->baud_rate); - divisor = CH341_BAUDBASE_DIVMAX; - - while ((factor > 0xfff0) && divisor) { - factor >>= 3; - divisor--; } - if (factor > 0xfff0) - return -EINVAL; - - factor = 0x10000 - factor; - a = (factor & 0xff00) | divisor; - b = factor & 0xff; - r = ch341_control_out(dev, 0x9a, 0x1312, a); if (!r) r = ch341_control_out(dev, 0x9a, 0x0f2c, b); @@ -136,18 +110,19 @@ static int ch341_set_baudrate(struct usb_device *dev, return r; } -static int ch341_set_handshake(struct usb_device *dev, u8 control) +static int ch341_set_handshake(struct usb_device *dev, + struct ch341_private *priv) { - dbg("ch341_set_handshake(0x%02x)", control); - return ch341_control_out(dev, 0xa4, ~control, 0); + dbg("ch341_set_handshake(%d,%d)", priv->dtr, priv->rts); + return ch341_control_out(dev, 0xa4, + ~((priv->dtr?1<<5:0)|(priv->rts?1<<6:0)), 0); } -static int ch341_get_status(struct usb_device *dev, struct ch341_private *priv) +static int ch341_get_status(struct usb_device *dev) { char *buffer; int r; const unsigned size = 8; - unsigned long flags; dbg("ch341_get_status()"); @@ -159,15 +134,10 @@ static int ch341_get_status(struct usb_device *dev, struct ch341_private *priv) if (r < 0) goto out; - /* setup the private status if available */ - if (r == 2) { - r = 0; - spin_lock_irqsave(&priv->lock, flags); - priv->line_status = (~(*buffer)) & CH341_BITS_MODEM_STAT; - priv->multi_status_change = 0; - spin_unlock_irqrestore(&priv->lock, flags); - } else - r = -EPROTO; + /* Not having the datasheet for the CH341, we ignore the bytes returned + * from the device. Return error if the device did not respond in time. + */ + r = 0; out: kfree(buffer); return r; @@ -210,7 +180,7 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv) goto out; /* expect 0xff 0xee */ - r = ch341_get_status(dev, priv); + r = ch341_get_status(dev); if (r < 0) goto out; @@ -222,12 +192,12 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv) if (r < 0) goto out; - r = ch341_set_handshake(dev, priv->line_control); + r = ch341_set_handshake(dev, priv); if (r < 0) goto out; /* expect 0x9f 0xee */ - r = ch341_get_status(dev, priv); + r = ch341_get_status(dev); out: kfree(buffer); return r; @@ -246,10 +216,9 @@ static int ch341_attach(struct usb_serial *serial) if (!priv) return -ENOMEM; - spin_lock_init(&priv->lock); - init_waitqueue_head(&priv->delta_msr_wait); priv->baud_rate = DEFAULT_BAUD_RATE; - priv->line_control = CH341_BIT_RTS | CH341_BIT_DTR; + priv->dtr = 1; + priv->rts = 1; r = ch341_configure(serial->dev, priv); if (r < 0) @@ -262,35 +231,6 @@ error: kfree(priv); return r; } -static void ch341_close(struct tty_struct *tty, struct usb_serial_port *port, - struct file *filp) -{ - struct ch341_private *priv = usb_get_serial_port_data(port); - unsigned long flags; - unsigned int c_cflag; - - dbg("%s - port %d", __func__, port->number); - - /* shutdown our urbs */ - dbg("%s - shutting down urbs", __func__); - usb_kill_urb(port->write_urb); - usb_kill_urb(port->read_urb); - usb_kill_urb(port->interrupt_in_urb); - - if (tty) { - c_cflag = tty->termios->c_cflag; - if (c_cflag & HUPCL) { - /* drop DTR and RTS */ - spin_lock_irqsave(&priv->lock, flags); - priv->line_control = 0; - spin_unlock_irqrestore(&priv->lock, flags); - ch341_set_handshake(port->serial->dev, 0); - } - } - wake_up_interruptible(&priv->delta_msr_wait); -} - - /* open this device, set default parameters */ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) @@ -302,13 +242,14 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port, dbg("ch341_open()"); priv->baud_rate = DEFAULT_BAUD_RATE; - priv->line_control = CH341_BIT_RTS | CH341_BIT_DTR; + priv->dtr = 1; + priv->rts = 1; r = ch341_configure(serial->dev, priv); if (r) goto out; - r = ch341_set_handshake(serial->dev, priv->line_control); + r = ch341_set_handshake(serial->dev, priv); if (r) goto out; @@ -316,16 +257,6 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port, if (r) goto out; - dbg("%s - submitting interrupt urb", __func__); - port->interrupt_in_urb->dev = serial->dev; - r = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); - if (r) { - dev_err(&port->dev, "%s - failed submitting interrupt urb," - " error %d\n", __func__, r); - ch341_close(tty, port, NULL); - return -EPROTO; - } - r = usb_serial_generic_open(tty, port, filp); out: return r; @@ -339,194 +270,38 @@ static void ch341_set_termios(struct tty_struct *tty, { struct ch341_private *priv = usb_get_serial_port_data(port); unsigned baud_rate; - unsigned long flags; dbg("ch341_set_termios()"); - if (!tty || !tty->termios) - return; - baud_rate = tty_get_baud_rate(tty); - priv->baud_rate = baud_rate; - - if (baud_rate) { - spin_lock_irqsave(&priv->lock, flags); - priv->line_control |= (CH341_BIT_DTR | CH341_BIT_RTS); - spin_unlock_irqrestore(&priv->lock, flags); - ch341_set_baudrate(port->serial->dev, priv); - } else { - spin_lock_irqsave(&priv->lock, flags); - priv->line_control &= ~(CH341_BIT_DTR | CH341_BIT_RTS); - spin_unlock_irqrestore(&priv->lock, flags); + switch (baud_rate) { + case 2400: + case 4800: + case 9600: + case 19200: + case 38400: + case 115200: + priv->baud_rate = baud_rate; + break; + default: + dbg("Rate %d not supported, using %d", + baud_rate, DEFAULT_BAUD_RATE); + priv->baud_rate = DEFAULT_BAUD_RATE; } - ch341_set_handshake(port->serial->dev, priv->line_control); + ch341_set_baudrate(port->serial->dev, priv); /* Unimplemented: * (cflag & CSIZE) : data bits [5, 8] * (cflag & PARENB) : parity {NONE, EVEN, ODD} * (cflag & CSTOPB) : stop bits [1, 2] */ -} - -static int ch341_tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear) -{ - struct usb_serial_port *port = tty->driver_data; - struct ch341_private *priv = usb_get_serial_port_data(port); - unsigned long flags; - u8 control; - - spin_lock_irqsave(&priv->lock, flags); - if (set & TIOCM_RTS) - priv->line_control |= CH341_BIT_RTS; - if (set & TIOCM_DTR) - priv->line_control |= CH341_BIT_DTR; - if (clear & TIOCM_RTS) - priv->line_control &= ~CH341_BIT_RTS; - if (clear & TIOCM_DTR) - priv->line_control &= ~CH341_BIT_DTR; - control = priv->line_control; - spin_unlock_irqrestore(&priv->lock, flags); - - return ch341_set_handshake(port->serial->dev, control); -} - -static void ch341_read_int_callback(struct urb *urb) -{ - struct usb_serial_port *port = (struct usb_serial_port *) urb->context; - unsigned char *data = urb->transfer_buffer; - unsigned int actual_length = urb->actual_length; - int status; - - dbg("%s (%d)", __func__, port->number); - - switch (urb->status) { - case 0: - /* success */ - break; - case -ECONNRESET: - case -ENOENT: - case -ESHUTDOWN: - /* this urb is terminated, clean up */ - dbg("%s - urb shutting down with status: %d", __func__, - urb->status); - return; - default: - dbg("%s - nonzero urb status received: %d", __func__, - urb->status); - goto exit; - } - - usb_serial_debug_data(debug, &port->dev, __func__, - urb->actual_length, urb->transfer_buffer); - - if (actual_length >= 4) { - struct ch341_private *priv = usb_get_serial_port_data(port); - unsigned long flags; - - spin_lock_irqsave(&priv->lock, flags); - priv->line_status = (~(data[2])) & CH341_BITS_MODEM_STAT; - if ((data[1] & CH341_MULT_STAT)) - priv->multi_status_change = 1; - spin_unlock_irqrestore(&priv->lock, flags); - wake_up_interruptible(&priv->delta_msr_wait); - } - -exit: - status = usb_submit_urb(urb, GFP_ATOMIC); - if (status) - dev_err(&urb->dev->dev, - "%s - usb_submit_urb failed with result %d\n", - __func__, status); -} - -static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) -{ - struct ch341_private *priv = usb_get_serial_port_data(port); - unsigned long flags; - u8 prevstatus; - u8 status; - u8 changed; - u8 multi_change = 0; - - spin_lock_irqsave(&priv->lock, flags); - prevstatus = priv->line_status; - priv->multi_status_change = 0; - spin_unlock_irqrestore(&priv->lock, flags); - - while (!multi_change) { - interruptible_sleep_on(&priv->delta_msr_wait); - /* see if a signal did it */ - if (signal_pending(current)) - return -ERESTARTSYS; - - spin_lock_irqsave(&priv->lock, flags); - status = priv->line_status; - multi_change = priv->multi_status_change; - spin_unlock_irqrestore(&priv->lock, flags); - - changed = prevstatus ^ status; - - if (((arg & TIOCM_RNG) && (changed & CH341_BIT_RI)) || - ((arg & TIOCM_DSR) && (changed & CH341_BIT_DSR)) || - ((arg & TIOCM_CD) && (changed & CH341_BIT_DCD)) || - ((arg & TIOCM_CTS) && (changed & CH341_BIT_CTS))) { - return 0; - } - prevstatus = status; - } - - return 0; -} - -/*static int ch341_ioctl(struct usb_serial_port *port, struct file *file,*/ -static int ch341_ioctl(struct tty_struct *tty, struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct usb_serial_port *port = tty->driver_data; - dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); - - switch (cmd) { - case TIOCMIWAIT: - dbg("%s (%d) TIOCMIWAIT", __func__, port->number); - return wait_modem_info(port, arg); - - default: - dbg("%s not supported = 0x%04x", __func__, cmd); - break; - } - - return -ENOIOCTLCMD; -} - -static int ch341_tiocmget(struct tty_struct *tty, struct file *file) -{ - struct usb_serial_port *port = tty->driver_data; - struct ch341_private *priv = usb_get_serial_port_data(port); - unsigned long flags; - u8 mcr; - u8 status; - unsigned int result; - - dbg("%s (%d)", __func__, port->number); - - spin_lock_irqsave(&priv->lock, flags); - mcr = priv->line_control; - status = priv->line_status; - spin_unlock_irqrestore(&priv->lock, flags); - - result = ((mcr & CH341_BIT_DTR) ? TIOCM_DTR : 0) - | ((mcr & CH341_BIT_RTS) ? TIOCM_RTS : 0) - | ((status & CH341_BIT_CTS) ? TIOCM_CTS : 0) - | ((status & CH341_BIT_DSR) ? TIOCM_DSR : 0) - | ((status & CH341_BIT_RI) ? TIOCM_RI : 0) - | ((status & CH341_BIT_DCD) ? TIOCM_CD : 0); - - dbg("%s - result = %x", __func__, result); - return result; + /* Copy back the old hardware settings */ + tty_termios_copy_hw(tty->termios, old_termios); + /* And re-encode with the new baud */ + tty_encode_baud_rate(tty, baud_rate, baud_rate); } @@ -564,17 +339,12 @@ static struct usb_serial_driver ch341_device = { .owner = THIS_MODULE, .name = "ch341-uart", }, - .id_table = id_table, - .usb_driver = &ch341_driver, - .num_ports = 1, - .open = ch341_open, - .close = ch341_close, - .ioctl = ch341_ioctl, - .set_termios = ch341_set_termios, - .tiocmget = ch341_tiocmget, - .tiocmset = ch341_tiocmset, - .read_int_callback = ch341_read_int_callback, - .attach = ch341_attach, + .id_table = id_table, + .usb_driver = &ch341_driver, + .num_ports = 1, + .open = ch341_open, + .set_termios = ch341_set_termios, + .attach = ch341_attach, }; static int __init ch341_init(void) -- cgit v0.10.2 From f4c1a8379a6d1ba39ac7b87f75d1352ef05cffff Mon Sep 17 00:00:00 2001 From: Werner Cornelius Date: Fri, 16 Jan 2009 21:02:41 +0100 Subject: USB: usb-serial ch341: support for DTR/RTS/CTS commit 664d5df92e88b6ef091048a802b3750f4e989180 upstream. Fixup of Werner Cornelius patch to the ch341 USB-serial driver, which adds: - support all baudrates, not just a hard-coded set - support for controlling DTR, RTS and CTS Features still missing: - character length other than 8 bits - parity settings - break control I adapted his patch for the new usb_serial API introduced in 2.6.25-git8 by Alan Cox on 22 July 2008. Non-compliance to the new API was a reason for refusing a similar patch from Tollef Fog Heen. Usage example by Tollef Fog Heen : TEMPer USB thermometer based on a patch by: From: Tollef Fog Heen * Implement support for all baud rates rather than just a hard coded set. * Make it possible to control status and control lines * Grab a bunch of #defines from FreeBSD to reduce the number of magic numbers in the file Signed-off-by: Werner Cornelius Signed-off-by: Boris Hajduk Cc: Alan Cox Signed-off-by: Tollef Fog Heen Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index d33d39d..ab4cc27 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -1,5 +1,7 @@ /* * Copyright 2007, Frank A Kingswood + * Copyright 2007, Werner Cornelius + * Copyright 2009, Boris Hajduk * * ch341.c implements a serial port driver for the Winchiphead CH341. * @@ -21,9 +23,39 @@ #include #include -#define DEFAULT_BAUD_RATE 2400 +#define DEFAULT_BAUD_RATE 9600 #define DEFAULT_TIMEOUT 1000 +/* flags for IO-Bits */ +#define CH341_BIT_RTS (1 << 6) +#define CH341_BIT_DTR (1 << 5) + +/******************************/ +/* interrupt pipe definitions */ +/******************************/ +/* always 4 interrupt bytes */ +/* first irq byte normally 0x08 */ +/* second irq byte base 0x7d + below */ +/* third irq byte base 0x94 + below */ +/* fourth irq byte normally 0xee */ + +/* second interrupt byte */ +#define CH341_MULT_STAT 0x04 /* multiple status since last interrupt event */ + +/* status returned in third interrupt answer byte, inverted in data + from irq */ +#define CH341_BIT_CTS 0x01 +#define CH341_BIT_DSR 0x02 +#define CH341_BIT_RI 0x04 +#define CH341_BIT_DCD 0x08 +#define CH341_BITS_MODEM_STAT 0x0f /* all bits */ + +/*******************************/ +/* baudrate calculation factor */ +/*******************************/ +#define CH341_BAUDBASE_FACTOR 1532620800 +#define CH341_BAUDBASE_DIVMAX 3 + static int debug; static struct usb_device_id id_table [] = { @@ -34,9 +66,12 @@ static struct usb_device_id id_table [] = { MODULE_DEVICE_TABLE(usb, id_table); struct ch341_private { - unsigned baud_rate; - u8 dtr; - u8 rts; + spinlock_t lock; /* access lock */ + wait_queue_head_t delta_msr_wait; /* wait queue for modem status */ + unsigned baud_rate; /* set baud rate */ + u8 line_control; /* set line control value RTS/DTR */ + u8 line_status; /* active status of modem control inputs */ + u8 multi_status_change; /* status changed multiple since last call */ }; static int ch341_control_out(struct usb_device *dev, u8 request, @@ -72,37 +107,28 @@ static int ch341_set_baudrate(struct usb_device *dev, { short a, b; int r; + unsigned long factor; + short divisor; dbg("ch341_set_baudrate(%d)", priv->baud_rate); - switch (priv->baud_rate) { - case 2400: - a = 0xd901; - b = 0x0038; - break; - case 4800: - a = 0x6402; - b = 0x001f; - break; - case 9600: - a = 0xb202; - b = 0x0013; - break; - case 19200: - a = 0xd902; - b = 0x000d; - break; - case 38400: - a = 0x6403; - b = 0x000a; - break; - case 115200: - a = 0xcc03; - b = 0x0008; - break; - default: + + if (!priv->baud_rate) return -EINVAL; + factor = (CH341_BAUDBASE_FACTOR / priv->baud_rate); + divisor = CH341_BAUDBASE_DIVMAX; + + while ((factor > 0xfff0) && divisor) { + factor >>= 3; + divisor--; } + if (factor > 0xfff0) + return -EINVAL; + + factor = 0x10000 - factor; + a = (factor & 0xff00) | divisor; + b = factor & 0xff; + r = ch341_control_out(dev, 0x9a, 0x1312, a); if (!r) r = ch341_control_out(dev, 0x9a, 0x0f2c, b); @@ -110,19 +136,18 @@ static int ch341_set_baudrate(struct usb_device *dev, return r; } -static int ch341_set_handshake(struct usb_device *dev, - struct ch341_private *priv) +static int ch341_set_handshake(struct usb_device *dev, u8 control) { - dbg("ch341_set_handshake(%d,%d)", priv->dtr, priv->rts); - return ch341_control_out(dev, 0xa4, - ~((priv->dtr?1<<5:0)|(priv->rts?1<<6:0)), 0); + dbg("ch341_set_handshake(0x%02x)", control); + return ch341_control_out(dev, 0xa4, ~control, 0); } -static int ch341_get_status(struct usb_device *dev) +static int ch341_get_status(struct usb_device *dev, struct ch341_private *priv) { char *buffer; int r; const unsigned size = 8; + unsigned long flags; dbg("ch341_get_status()"); @@ -134,10 +159,15 @@ static int ch341_get_status(struct usb_device *dev) if (r < 0) goto out; - /* Not having the datasheet for the CH341, we ignore the bytes returned - * from the device. Return error if the device did not respond in time. - */ - r = 0; + /* setup the private status if available */ + if (r == 2) { + r = 0; + spin_lock_irqsave(&priv->lock, flags); + priv->line_status = (~(*buffer)) & CH341_BITS_MODEM_STAT; + priv->multi_status_change = 0; + spin_unlock_irqrestore(&priv->lock, flags); + } else + r = -EPROTO; out: kfree(buffer); return r; @@ -180,7 +210,7 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv) goto out; /* expect 0xff 0xee */ - r = ch341_get_status(dev); + r = ch341_get_status(dev, priv); if (r < 0) goto out; @@ -192,12 +222,12 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv) if (r < 0) goto out; - r = ch341_set_handshake(dev, priv); + r = ch341_set_handshake(dev, priv->line_control); if (r < 0) goto out; /* expect 0x9f 0xee */ - r = ch341_get_status(dev); + r = ch341_get_status(dev, priv); out: kfree(buffer); return r; @@ -216,9 +246,10 @@ static int ch341_attach(struct usb_serial *serial) if (!priv) return -ENOMEM; + spin_lock_init(&priv->lock); + init_waitqueue_head(&priv->delta_msr_wait); priv->baud_rate = DEFAULT_BAUD_RATE; - priv->dtr = 1; - priv->rts = 1; + priv->line_control = CH341_BIT_RTS | CH341_BIT_DTR; r = ch341_configure(serial->dev, priv); if (r < 0) @@ -231,6 +262,35 @@ error: kfree(priv); return r; } +static void ch341_close(struct tty_struct *tty, struct usb_serial_port *port, + struct file *filp) +{ + struct ch341_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + unsigned int c_cflag; + + dbg("%s - port %d", __func__, port->number); + + /* shutdown our urbs */ + dbg("%s - shutting down urbs", __func__); + usb_kill_urb(port->write_urb); + usb_kill_urb(port->read_urb); + usb_kill_urb(port->interrupt_in_urb); + + if (tty) { + c_cflag = tty->termios->c_cflag; + if (c_cflag & HUPCL) { + /* drop DTR and RTS */ + spin_lock_irqsave(&priv->lock, flags); + priv->line_control = 0; + spin_unlock_irqrestore(&priv->lock, flags); + ch341_set_handshake(port->serial->dev, 0); + } + } + wake_up_interruptible(&priv->delta_msr_wait); +} + + /* open this device, set default parameters */ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) @@ -242,14 +302,13 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port, dbg("ch341_open()"); priv->baud_rate = DEFAULT_BAUD_RATE; - priv->dtr = 1; - priv->rts = 1; + priv->line_control = CH341_BIT_RTS | CH341_BIT_DTR; r = ch341_configure(serial->dev, priv); if (r) goto out; - r = ch341_set_handshake(serial->dev, priv); + r = ch341_set_handshake(serial->dev, priv->line_control); if (r) goto out; @@ -257,6 +316,16 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port, if (r) goto out; + dbg("%s - submitting interrupt urb", __func__); + port->interrupt_in_urb->dev = serial->dev; + r = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); + if (r) { + dev_err(&port->dev, "%s - failed submitting interrupt urb," + " error %d\n", __func__, r); + ch341_close(tty, port, NULL); + return -EPROTO; + } + r = usb_serial_generic_open(tty, port, filp); out: return r; @@ -270,38 +339,194 @@ static void ch341_set_termios(struct tty_struct *tty, { struct ch341_private *priv = usb_get_serial_port_data(port); unsigned baud_rate; + unsigned long flags; dbg("ch341_set_termios()"); + if (!tty || !tty->termios) + return; + baud_rate = tty_get_baud_rate(tty); - switch (baud_rate) { - case 2400: - case 4800: - case 9600: - case 19200: - case 38400: - case 115200: - priv->baud_rate = baud_rate; - break; - default: - dbg("Rate %d not supported, using %d", - baud_rate, DEFAULT_BAUD_RATE); - priv->baud_rate = DEFAULT_BAUD_RATE; + priv->baud_rate = baud_rate; + + if (baud_rate) { + spin_lock_irqsave(&priv->lock, flags); + priv->line_control |= (CH341_BIT_DTR | CH341_BIT_RTS); + spin_unlock_irqrestore(&priv->lock, flags); + ch341_set_baudrate(port->serial->dev, priv); + } else { + spin_lock_irqsave(&priv->lock, flags); + priv->line_control &= ~(CH341_BIT_DTR | CH341_BIT_RTS); + spin_unlock_irqrestore(&priv->lock, flags); } - ch341_set_baudrate(port->serial->dev, priv); + ch341_set_handshake(port->serial->dev, priv->line_control); /* Unimplemented: * (cflag & CSIZE) : data bits [5, 8] * (cflag & PARENB) : parity {NONE, EVEN, ODD} * (cflag & CSTOPB) : stop bits [1, 2] */ +} + +static int ch341_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct usb_serial_port *port = tty->driver_data; + struct ch341_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + u8 control; + + spin_lock_irqsave(&priv->lock, flags); + if (set & TIOCM_RTS) + priv->line_control |= CH341_BIT_RTS; + if (set & TIOCM_DTR) + priv->line_control |= CH341_BIT_DTR; + if (clear & TIOCM_RTS) + priv->line_control &= ~CH341_BIT_RTS; + if (clear & TIOCM_DTR) + priv->line_control &= ~CH341_BIT_DTR; + control = priv->line_control; + spin_unlock_irqrestore(&priv->lock, flags); + + return ch341_set_handshake(port->serial->dev, control); +} + +static void ch341_read_int_callback(struct urb *urb) +{ + struct usb_serial_port *port = (struct usb_serial_port *) urb->context; + unsigned char *data = urb->transfer_buffer; + unsigned int actual_length = urb->actual_length; + int status; + + dbg("%s (%d)", __func__, port->number); + + switch (urb->status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dbg("%s - urb shutting down with status: %d", __func__, + urb->status); + return; + default: + dbg("%s - nonzero urb status received: %d", __func__, + urb->status); + goto exit; + } + + usb_serial_debug_data(debug, &port->dev, __func__, + urb->actual_length, urb->transfer_buffer); + + if (actual_length >= 4) { + struct ch341_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + priv->line_status = (~(data[2])) & CH341_BITS_MODEM_STAT; + if ((data[1] & CH341_MULT_STAT)) + priv->multi_status_change = 1; + spin_unlock_irqrestore(&priv->lock, flags); + wake_up_interruptible(&priv->delta_msr_wait); + } + +exit: + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status) + dev_err(&urb->dev->dev, + "%s - usb_submit_urb failed with result %d\n", + __func__, status); +} + +static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) +{ + struct ch341_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + u8 prevstatus; + u8 status; + u8 changed; + u8 multi_change = 0; + + spin_lock_irqsave(&priv->lock, flags); + prevstatus = priv->line_status; + priv->multi_status_change = 0; + spin_unlock_irqrestore(&priv->lock, flags); + + while (!multi_change) { + interruptible_sleep_on(&priv->delta_msr_wait); + /* see if a signal did it */ + if (signal_pending(current)) + return -ERESTARTSYS; + + spin_lock_irqsave(&priv->lock, flags); + status = priv->line_status; + multi_change = priv->multi_status_change; + spin_unlock_irqrestore(&priv->lock, flags); + + changed = prevstatus ^ status; + + if (((arg & TIOCM_RNG) && (changed & CH341_BIT_RI)) || + ((arg & TIOCM_DSR) && (changed & CH341_BIT_DSR)) || + ((arg & TIOCM_CD) && (changed & CH341_BIT_DCD)) || + ((arg & TIOCM_CTS) && (changed & CH341_BIT_CTS))) { + return 0; + } + prevstatus = status; + } + + return 0; +} + +/*static int ch341_ioctl(struct usb_serial_port *port, struct file *file,*/ +static int ch341_ioctl(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct usb_serial_port *port = tty->driver_data; + dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); + + switch (cmd) { + case TIOCMIWAIT: + dbg("%s (%d) TIOCMIWAIT", __func__, port->number); + return wait_modem_info(port, arg); + + default: + dbg("%s not supported = 0x%04x", __func__, cmd); + break; + } + + return -ENOIOCTLCMD; +} + +static int ch341_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct usb_serial_port *port = tty->driver_data; + struct ch341_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + u8 mcr; + u8 status; + unsigned int result; + + dbg("%s (%d)", __func__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + mcr = priv->line_control; + status = priv->line_status; + spin_unlock_irqrestore(&priv->lock, flags); + + result = ((mcr & CH341_BIT_DTR) ? TIOCM_DTR : 0) + | ((mcr & CH341_BIT_RTS) ? TIOCM_RTS : 0) + | ((status & CH341_BIT_CTS) ? TIOCM_CTS : 0) + | ((status & CH341_BIT_DSR) ? TIOCM_DSR : 0) + | ((status & CH341_BIT_RI) ? TIOCM_RI : 0) + | ((status & CH341_BIT_DCD) ? TIOCM_CD : 0); + + dbg("%s - result = %x", __func__, result); - /* Copy back the old hardware settings */ - tty_termios_copy_hw(tty->termios, old_termios); - /* And re-encode with the new baud */ - tty_encode_baud_rate(tty, baud_rate, baud_rate); + return result; } @@ -339,12 +564,17 @@ static struct usb_serial_driver ch341_device = { .owner = THIS_MODULE, .name = "ch341-uart", }, - .id_table = id_table, - .usb_driver = &ch341_driver, - .num_ports = 1, - .open = ch341_open, - .set_termios = ch341_set_termios, - .attach = ch341_attach, + .id_table = id_table, + .usb_driver = &ch341_driver, + .num_ports = 1, + .open = ch341_open, + .close = ch341_close, + .ioctl = ch341_ioctl, + .set_termios = ch341_set_termios, + .tiocmget = ch341_tiocmget, + .tiocmset = ch341_tiocmset, + .read_int_callback = ch341_read_int_callback, + .attach = ch341_attach, }; static int __init ch341_init(void) -- cgit v0.10.2 From dfc15e8955338fedf5c5d15622c4042c1e4ee332 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 9 Apr 2009 14:59:44 -0400 Subject: usb-storage: fix mistake in Makefile This patch (as1228) fixes a Makefile error introduced when the subdrivers in usb-storage were split out into separate modules. The intention is that when CONFIG_USB_LIBUSUAL is set, libusual.o and usual-tables.o should be combined into a single object file (called usb-libusual). The current Makefile will instead create two separate objects, and the result won't load properly. Signed-off-by: Alan Stern Reported-and-tested-by: Alan Jenkins Reported-and-tested-by: Mike Galbraith Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/storage/Makefile b/drivers/usb/storage/Makefile index 5be54c0..ef7e5a8 100644 --- a/drivers/usb/storage/Makefile +++ b/drivers/usb/storage/Makefile @@ -17,7 +17,8 @@ usb-storage-objs := scsiglue.o protocol.o transport.o usb.o \ ifeq ($(CONFIG_USB_LIBUSUAL),) usb-storage-objs += usual-tables.o else - obj-$(CONFIG_USB) += libusual.o usual-tables.o + obj-$(CONFIG_USB) += usb-libusual.o + usb-libusual-objs := libusual.o usual-tables.o endif obj-$(CONFIG_USB_STORAGE_ALAUDA) += ums-alauda.o -- cgit v0.10.2 From d45e230bf03850f17394a760dfa003d986a67729 Mon Sep 17 00:00:00 2001 From: "Dr. Greg Wettstein" Date: Sat, 11 Apr 2009 09:12:08 -0500 Subject: USB device codes for Motorola phone. The v950 appears to be a ruggedized version of the Motorola Razor phone. Tethering to the phone to use it in 'phone as modem' mode requires the use of the specialized moto-modem driver which layers over the usb-serial driver. Support for the v950 was added simply adding the device ID's for the phone. Signed-off-by: Dr. Greg Wettstein Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/serial/moto_modem.c b/drivers/usb/serial/moto_modem.c index 2e8e054..b66b71c 100644 --- a/drivers/usb/serial/moto_modem.c +++ b/drivers/usb/serial/moto_modem.c @@ -25,6 +25,7 @@ static struct usb_device_id id_table [] = { { USB_DEVICE(0x05c6, 0x3197) }, /* unknown Motorola phone */ { USB_DEVICE(0x0c44, 0x0022) }, /* unknown Mororola phone */ { USB_DEVICE(0x22b8, 0x2a64) }, /* Motorola KRZR K1m */ + { USB_DEVICE(0x22b8, 0x2c64) }, /* Motorola V950 phone */ { }, }; MODULE_DEVICE_TABLE(usb, id_table); -- cgit v0.10.2 From 3444b26afa145148951112534f298bdc554ec789 Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 8 Apr 2009 17:36:28 +0000 Subject: USB: add reset endpoint operations Wireless USB endpoint state has a sequence number and a current window and not just a single toggle bit. So allow HCDs to provide a endpoint_reset method and call this or clear the software toggles as required (after a clear halt, set configuration etc.). usb_settoggle() and friends are then HCD internal and are moved into core/hcd.h and all device drivers call usb_reset_endpoint() instead. If the device endpoint state has been reset (with a clear halt) but the host endpoint state has not then subsequent data transfers will not complete. The device will only work again after it is reset or disconnected. Signed-off-by: David Vrabel Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/block/ub.c b/drivers/block/ub.c index 69b7f8e..689cd27 100644 --- a/drivers/block/ub.c +++ b/drivers/block/ub.c @@ -1025,6 +1025,7 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd) { struct urb *urb = &sc->work_urb; struct bulk_cs_wrap *bcs; + int endp; int len; int rc; @@ -1033,6 +1034,10 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd) return; } + endp = usb_pipeendpoint(sc->last_pipe); + if (usb_pipein(sc->last_pipe)) + endp |= USB_DIR_IN; + if (cmd->state == UB_CMDST_CLEAR) { if (urb->status == -EPIPE) { /* @@ -1048,9 +1053,7 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd) * We ignore the result for the halt clear. */ - /* reset the endpoint toggle */ - usb_settoggle(sc->dev, usb_pipeendpoint(sc->last_pipe), - usb_pipeout(sc->last_pipe), 0); + usb_reset_endpoint(sc->dev, endp); ub_state_sense(sc, cmd); @@ -1065,9 +1068,7 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd) * We ignore the result for the halt clear. */ - /* reset the endpoint toggle */ - usb_settoggle(sc->dev, usb_pipeendpoint(sc->last_pipe), - usb_pipeout(sc->last_pipe), 0); + usb_reset_endpoint(sc->dev, endp); ub_state_stat(sc, cmd); @@ -1082,9 +1083,7 @@ static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd) * We ignore the result for the halt clear. */ - /* reset the endpoint toggle */ - usb_settoggle(sc->dev, usb_pipeendpoint(sc->last_pipe), - usb_pipeout(sc->last_pipe), 0); + usb_reset_endpoint(sc->dev, endp); ub_state_stat_counted(sc, cmd); @@ -2119,8 +2118,7 @@ static int ub_probe_clear_stall(struct ub_dev *sc, int stalled_pipe) del_timer_sync(&timer); usb_kill_urb(&sc->work_urb); - /* reset the endpoint toggle */ - usb_settoggle(sc->dev, endp, usb_pipeout(sc->last_pipe), 0); + usb_reset_endpoint(sc->dev, endp); return 0; } diff --git a/drivers/isdn/hisax/st5481_usb.c b/drivers/isdn/hisax/st5481_usb.c index ec3c0e5..2b3a055 100644 --- a/drivers/isdn/hisax/st5481_usb.c +++ b/drivers/isdn/hisax/st5481_usb.c @@ -149,14 +149,7 @@ static void usb_ctrl_complete(struct urb *urb) if (ctrl_msg->dr.bRequest == USB_REQ_CLEAR_FEATURE) { /* Special case handling for pipe reset */ le16_to_cpus(&ctrl_msg->dr.wIndex); - - /* toggle is reset on clear */ - usb_settoggle(adapter->usb_dev, - ctrl_msg->dr.wIndex & ~USB_DIR_IN, - (ctrl_msg->dr.wIndex & USB_DIR_IN) == 0, - 0); - - + usb_reset_endpoint(adapter->usb_dev, ctrl_msg->dr.wIndex); } if (ctrl_msg->complete) diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c index d9d974a..add3395 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c +++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c @@ -1461,7 +1461,6 @@ static int pvr2_upload_firmware1(struct pvr2_hdw *hdw) return ret; } - usb_settoggle(hdw->usb_dev, 0 & 0xf, !(0 & USB_DIR_IN), 0); usb_clear_halt(hdw->usb_dev, usb_sndbulkpipe(hdw->usb_dev, 0 & 0x7f)); pipe = usb_sndctrlpipe(hdw->usb_dev, 0); diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index df3c539..3086090 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -841,7 +841,7 @@ static int proc_resetep(struct dev_state *ps, void __user *arg) ret = checkintf(ps, ret); if (ret) return ret; - usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); + usb_reset_endpoint(ps->dev, ep); return 0; } diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 81fa850..42b93da 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1539,6 +1539,32 @@ void usb_hcd_disable_endpoint(struct usb_device *udev, hcd->driver->endpoint_disable(hcd, ep); } +/** + * usb_hcd_reset_endpoint - reset host endpoint state + * @udev: USB device. + * @ep: the endpoint to reset. + * + * Resets any host endpoint state such as the toggle bit, sequence + * number and current window. + */ +void usb_hcd_reset_endpoint(struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + struct usb_hcd *hcd = bus_to_hcd(udev->bus); + + if (hcd->driver->endpoint_reset) + hcd->driver->endpoint_reset(hcd, ep); + else { + int epnum = usb_endpoint_num(&ep->desc); + int is_out = usb_endpoint_dir_out(&ep->desc); + int is_control = usb_endpoint_xfer_control(&ep->desc); + + usb_settoggle(udev, epnum, is_out, 0); + if (is_control) + usb_settoggle(udev, epnum, !is_out, 0); + } +} + /* Protect against drivers that try to unlink URBs after the device * is gone, by waiting until all unlinks for @udev are finished. * Since we don't currently track URBs by device, simply wait until diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h index f750eb1..e7d4479 100644 --- a/drivers/usb/core/hcd.h +++ b/drivers/usb/core/hcd.h @@ -206,6 +206,11 @@ struct hc_driver { void (*endpoint_disable)(struct usb_hcd *hcd, struct usb_host_endpoint *ep); + /* (optional) reset any endpoint state such as sequence number + and current window */ + void (*endpoint_reset)(struct usb_hcd *hcd, + struct usb_host_endpoint *ep); + /* root hub support */ int (*hub_status_data) (struct usb_hcd *hcd, char *buf); int (*hub_control) (struct usb_hcd *hcd, @@ -234,6 +239,8 @@ extern void usb_hcd_flush_endpoint(struct usb_device *udev, struct usb_host_endpoint *ep); extern void usb_hcd_disable_endpoint(struct usb_device *udev, struct usb_host_endpoint *ep); +extern void usb_hcd_reset_endpoint(struct usb_device *udev, + struct usb_host_endpoint *ep); extern void usb_hcd_synchronize_unlinks(struct usb_device *udev); extern int usb_hcd_get_frame_number(struct usb_device *udev); @@ -279,6 +286,13 @@ extern irqreturn_t usb_hcd_irq(int irq, void *__hcd); extern void usb_hc_died(struct usb_hcd *hcd); extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd); +/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */ +#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1) +#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep))) +#define usb_settoggle(dev, ep, out, bit) \ + ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \ + ((bit) << (ep))) + /* -------------------------------------------------------------------------- */ /* Enumeration is only for the hub driver, or HCD virtual root hubs */ diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 30a0690..b626283 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1002,8 +1002,7 @@ int usb_clear_halt(struct usb_device *dev, int pipe) * the copy in usb-storage, for as long as we need two copies. */ - /* toggle was reset by the clear */ - usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0); + usb_reset_endpoint(dev, endp); return 0; } @@ -1076,6 +1075,30 @@ void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr, } /** + * usb_reset_endpoint - Reset an endpoint's state. + * @dev: the device whose endpoint is to be reset + * @epaddr: the endpoint's address. Endpoint number for output, + * endpoint number + USB_DIR_IN for input + * + * Resets any host-side endpoint state such as the toggle bit, + * sequence number or current window. + */ +void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr) +{ + unsigned int epnum = epaddr & USB_ENDPOINT_NUMBER_MASK; + struct usb_host_endpoint *ep; + + if (usb_endpoint_out(epaddr)) + ep = dev->ep_out[epnum]; + else + ep = dev->ep_in[epnum]; + if (ep) + usb_hcd_reset_endpoint(dev, ep); +} +EXPORT_SYMBOL_GPL(usb_reset_endpoint); + + +/** * usb_disable_interface -- Disable all endpoints for an interface * @dev: the device whose interface is being disabled * @intf: pointer to the interface descriptor @@ -1117,7 +1140,6 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0) usb_disable_endpoint(dev, i, true); usb_disable_endpoint(dev, i + USB_DIR_IN, true); } - dev->toggle[0] = dev->toggle[1] = 0; /* getting rid of interfaces will disconnect * any drivers bound to them (a key side effect) @@ -1154,28 +1176,24 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0) * usb_enable_endpoint - Enable an endpoint for USB communications * @dev: the device whose interface is being enabled * @ep: the endpoint - * @reset_toggle: flag to set the endpoint's toggle back to 0 + * @reset_ep: flag to reset the endpoint state * - * Resets the endpoint toggle if asked, and sets dev->ep_{in,out} pointers. + * Resets the endpoint state if asked, and sets dev->ep_{in,out} pointers. * For control endpoints, both the input and output sides are handled. */ void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep, - bool reset_toggle) + bool reset_ep) { int epnum = usb_endpoint_num(&ep->desc); int is_out = usb_endpoint_dir_out(&ep->desc); int is_control = usb_endpoint_xfer_control(&ep->desc); - if (is_out || is_control) { - if (reset_toggle) - usb_settoggle(dev, epnum, 1, 0); + if (reset_ep) + usb_hcd_reset_endpoint(dev, ep); + if (is_out || is_control) dev->ep_out[epnum] = ep; - } - if (!is_out || is_control) { - if (reset_toggle) - usb_settoggle(dev, epnum, 0, 0); + if (!is_out || is_control) dev->ep_in[epnum] = ep; - } ep->enabled = 1; } @@ -1183,18 +1201,18 @@ void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep, * usb_enable_interface - Enable all the endpoints for an interface * @dev: the device whose interface is being enabled * @intf: pointer to the interface descriptor - * @reset_toggles: flag to set the endpoints' toggles back to 0 + * @reset_eps: flag to reset the endpoints' state * * Enables all the endpoints for the interface's current altsetting. */ void usb_enable_interface(struct usb_device *dev, - struct usb_interface *intf, bool reset_toggles) + struct usb_interface *intf, bool reset_eps) { struct usb_host_interface *alt = intf->cur_altsetting; int i; for (i = 0; i < alt->desc.bNumEndpoints; ++i) - usb_enable_endpoint(dev, &alt->endpoint[i], reset_toggles); + usb_enable_endpoint(dev, &alt->endpoint[i], reset_eps); } /** @@ -1335,7 +1353,7 @@ EXPORT_SYMBOL_GPL(usb_set_interface); * This issues a standard SET_CONFIGURATION request to the device using * the current configuration. The effect is to reset most USB-related * state in the device, including interface altsettings (reset to zero), - * endpoint halts (cleared), and data toggle (only for bulk and interrupt + * endpoint halts (cleared), and endpoint state (only for bulk and interrupt * endpoints). Other usbcore state is unchanged, including bindings of * usb device drivers to interfaces. * @@ -1343,7 +1361,7 @@ EXPORT_SYMBOL_GPL(usb_set_interface); * (multi-interface) devices. Instead, the driver for each interface may * use usb_set_interface() on the interfaces it claims. Be careful though; * some devices don't support the SET_INTERFACE request, and others won't - * reset all the interface state (notably data toggles). Resetting the whole + * reset all the interface state (notably endpoint state). Resetting the whole * configuration would affect other drivers' interfaces. * * The caller must own the device lock. @@ -1376,8 +1394,6 @@ int usb_reset_configuration(struct usb_device *dev) if (retval < 0) return retval; - dev->toggle[0] = dev->toggle[1] = 0; - /* re-init hc/hcd interface/endpoint state */ for (i = 0; i < config->desc.bNumInterfaces; i++) { struct usb_interface *intf = config->interface[i]; diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index dcfc072..7eee400 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -362,7 +362,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent, dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE; dev->ep0.desc.bDescriptorType = USB_DT_ENDPOINT; /* ep0 maxpacket comes later, from device descriptor */ - usb_enable_endpoint(dev, &dev->ep0, true); + usb_enable_endpoint(dev, &dev->ep0, false); dev->can_submit = 1; /* Save readable and stable topology id, distinguishing devices diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c index 49aedb3..fcb3202 100644 --- a/drivers/usb/storage/transport.c +++ b/drivers/usb/storage/transport.c @@ -247,10 +247,8 @@ int usb_stor_clear_halt(struct us_data *us, unsigned int pipe) USB_ENDPOINT_HALT, endp, NULL, 0, 3*HZ); - /* reset the endpoint toggle */ if (result >= 0) - usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe), - usb_pipeout(pipe), 0); + usb_reset_endpoint(us->pusb_dev, endp); US_DEBUGP("%s: result = %d\n", __func__, result); return result; diff --git a/include/linux/usb.h b/include/linux/usb.h index c6b2ab4..3aa2cd1 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1387,6 +1387,7 @@ extern int usb_string(struct usb_device *dev, int index, extern int usb_clear_halt(struct usb_device *dev, int pipe); extern int usb_reset_configuration(struct usb_device *dev); extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate); +extern void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr); /* this request isn't really synchronous, but it belongs with the others */ extern int usb_driver_set_configuration(struct usb_device *udev, int config); @@ -1491,14 +1492,6 @@ void usb_sg_wait(struct usb_sg_request *io); #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) -/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */ -#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1) -#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep))) -#define usb_settoggle(dev, ep, out, bit) \ - ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \ - ((bit) << (ep))) - - static inline unsigned int __create_pipe(struct usb_device *dev, unsigned int endpoint) { -- cgit v0.10.2 From 7f0406db5fe4dd3ad3cbd53830239a87d68156fd Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 8 Apr 2009 17:36:29 +0000 Subject: USB: whci-hcd: provide a endpoint_reset method Provide a endpoint_reset method to reset sequence number and current window. This QHead information can only be changed while the qset is not in a schedule. Signed-off-by: David Vrabel Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/host/whci/asl.c b/drivers/usb/host/whci/asl.c index 958751c..be753f6 100644 --- a/drivers/usb/host/whci/asl.c +++ b/drivers/usb/host/whci/asl.c @@ -122,7 +122,8 @@ static uint32_t process_qset(struct whc *whc, struct whc_qset *qset) process_inactive_qtd(whc, qset, td); } - update |= qset_add_qtds(whc, qset); + if (!qset->remove) + update |= qset_add_qtds(whc, qset); done: /* diff --git a/drivers/usb/host/whci/hcd.c b/drivers/usb/host/whci/hcd.c index 1569afd..e019a50 100644 --- a/drivers/usb/host/whci/hcd.c +++ b/drivers/usb/host/whci/hcd.c @@ -186,6 +186,28 @@ static void whc_endpoint_disable(struct usb_hcd *usb_hcd, } } +static void whc_endpoint_reset(struct usb_hcd *usb_hcd, + struct usb_host_endpoint *ep) +{ + struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); + struct whc *whc = wusbhc_to_whc(wusbhc); + struct whc_qset *qset; + + qset = ep->hcpriv; + if (qset) { + qset->remove = 1; + + if (usb_endpoint_xfer_bulk(&ep->desc) + || usb_endpoint_xfer_control(&ep->desc)) + queue_work(whc->workqueue, &whc->async_work); + else + queue_work(whc->workqueue, &whc->periodic_work); + + qset_reset(whc, qset); + } +} + + static struct hc_driver whc_hc_driver = { .description = "whci-hcd", .product_desc = "Wireless host controller", @@ -200,6 +222,7 @@ static struct hc_driver whc_hc_driver = { .urb_enqueue = whc_urb_enqueue, .urb_dequeue = whc_urb_dequeue, .endpoint_disable = whc_endpoint_disable, + .endpoint_reset = whc_endpoint_reset, .hub_status_data = wusbhc_rh_status_data, .hub_control = wusbhc_rh_control, diff --git a/drivers/usb/host/whci/pzl.c b/drivers/usb/host/whci/pzl.c index df8b85f..0c40022 100644 --- a/drivers/usb/host/whci/pzl.c +++ b/drivers/usb/host/whci/pzl.c @@ -128,7 +128,8 @@ static enum whc_update pzl_process_qset(struct whc *whc, struct whc_qset *qset) process_inactive_qtd(whc, qset, td); } - update |= qset_add_qtds(whc, qset); + if (!qset->remove) + update |= qset_add_qtds(whc, qset); done: /* @@ -353,7 +354,6 @@ void pzl_qset_delete(struct whc *whc, struct whc_qset *qset) qset_delete(whc, qset); } - /** * pzl_init - initialize the periodic zone list * @whc: the WHCI host controller diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c index 7be7431..640b38f 100644 --- a/drivers/usb/host/whci/qset.c +++ b/drivers/usb/host/whci/qset.c @@ -89,11 +89,16 @@ static void qset_fill_qh(struct whc_qset *qset, struct urb *urb) QH_INFO3_TX_RATE_53_3 | QH_INFO3_TX_PWR(0) /* 0 == max power */ ); + + qset->qh.cur_window = cpu_to_le32((1 << qset->max_burst) - 1); } /** * qset_clear - clear fields in a qset so it may be reinserted into a - * schedule + * schedule. + * + * The sequence number and current window are not cleared (see + * qset_reset()). */ void qset_clear(struct whc *whc, struct whc_qset *qset) { @@ -101,9 +106,8 @@ void qset_clear(struct whc *whc, struct whc_qset *qset) qset->remove = 0; qset->qh.link = cpu_to_le32(QH_LINK_NTDS(8) | QH_LINK_T); - qset->qh.status = cpu_to_le16(QH_STATUS_ICUR(qset->td_start)); + qset->qh.status = qset->qh.status & QH_STATUS_SEQ_MASK; qset->qh.err_count = 0; - qset->qh.cur_window = cpu_to_le32((1 << qset->max_burst) - 1); qset->qh.scratch[0] = 0; qset->qh.scratch[1] = 0; qset->qh.scratch[2] = 0; @@ -114,6 +118,20 @@ void qset_clear(struct whc *whc, struct whc_qset *qset) } /** + * qset_reset - reset endpoint state in a qset. + * + * Clears the sequence number and current window. This qset must not + * be in the ASL or PZL. + */ +void qset_reset(struct whc *whc, struct whc_qset *qset) +{ + wait_for_completion(&qset->remove_complete); + + qset->qh.status &= ~QH_STATUS_SEQ_MASK; + qset->qh.cur_window = cpu_to_le32((1 << qset->max_burst) - 1); +} + +/** * get_qset - get the qset for an async endpoint * * A new qset is created if one does not already exist. diff --git a/drivers/usb/host/whci/whcd.h b/drivers/usb/host/whci/whcd.h index d3543a1..24e94d9 100644 --- a/drivers/usb/host/whci/whcd.h +++ b/drivers/usb/host/whci/whcd.h @@ -184,6 +184,7 @@ void qset_free(struct whc *whc, struct whc_qset *qset); struct whc_qset *get_qset(struct whc *whc, struct urb *urb, gfp_t mem_flags); void qset_delete(struct whc *whc, struct whc_qset *qset); void qset_clear(struct whc *whc, struct whc_qset *qset); +void qset_reset(struct whc *whc, struct whc_qset *qset); int qset_add_urb(struct whc *whc, struct whc_qset *qset, struct urb *urb, gfp_t mem_flags); void qset_free_std(struct whc *whc, struct whc_std *std); diff --git a/drivers/usb/host/whci/whci-hc.h b/drivers/usb/host/whci/whci-hc.h index 51df7e3..794dba0 100644 --- a/drivers/usb/host/whci/whci-hc.h +++ b/drivers/usb/host/whci/whci-hc.h @@ -185,6 +185,7 @@ struct whc_qhead { #define QH_STATUS_FLOW_CTRL (1 << 15) #define QH_STATUS_ICUR(i) ((i) << 5) #define QH_STATUS_TO_ICUR(s) (((s) >> 5) & 0x7) +#define QH_STATUS_SEQ_MASK 0x1f /** * usb_pipe_to_qh_type - USB core pipe type to QH transfer type -- cgit v0.10.2 From f720af91ec2c67e9a1abbd935570f4b4e1f0dd54 Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 8 Apr 2009 17:36:31 +0000 Subject: USB: whci-hcd: check return value of usb_hcd_link_urb_to_ep() Check the return value of usb_hcd_link_urb_to_ep() and do not add the urb to the ASL/PZL if it returns an error. Omitting the check results in urbs that appear to be submitted successfully but then cannot be unliked (because usb_hcd_check_unlink_urb() returns an error). This can cause khubd (for example) to block forever in usb_kill_urb(). Signed-off-by: David Vrabel Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/host/whci/asl.c b/drivers/usb/host/whci/asl.c index be753f6..c205078 100644 --- a/drivers/usb/host/whci/asl.c +++ b/drivers/usb/host/whci/asl.c @@ -255,23 +255,29 @@ int asl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags) spin_lock_irqsave(&whc->lock, flags); + err = usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb); + if (err < 0) { + spin_unlock_irqrestore(&whc->lock, flags); + return err; + } + qset = get_qset(whc, urb, GFP_ATOMIC); if (qset == NULL) err = -ENOMEM; else err = qset_add_urb(whc, qset, urb, GFP_ATOMIC); if (!err) { - usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb); if (!qset->in_sw_list) asl_qset_insert_begin(whc, qset); - } + } else + usb_hcd_unlink_urb_from_ep(&whc->wusbhc.usb_hcd, urb); spin_unlock_irqrestore(&whc->lock, flags); if (!err) queue_work(whc->workqueue, &whc->async_work); - return 0; + return err; } /** diff --git a/drivers/usb/host/whci/pzl.c b/drivers/usb/host/whci/pzl.c index 0c40022..ff4ef9e 100644 --- a/drivers/usb/host/whci/pzl.c +++ b/drivers/usb/host/whci/pzl.c @@ -283,23 +283,29 @@ int pzl_urb_enqueue(struct whc *whc, struct urb *urb, gfp_t mem_flags) spin_lock_irqsave(&whc->lock, flags); + err = usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb); + if (err < 0) { + spin_unlock_irqrestore(&whc->lock, flags); + return err; + } + qset = get_qset(whc, urb, GFP_ATOMIC); if (qset == NULL) err = -ENOMEM; else err = qset_add_urb(whc, qset, urb, GFP_ATOMIC); if (!err) { - usb_hcd_link_urb_to_ep(&whc->wusbhc.usb_hcd, urb); if (!qset->in_sw_list) qset_insert_in_sw_list(whc, qset); - } + } else + usb_hcd_unlink_urb_from_ep(&whc->wusbhc.usb_hcd, urb); spin_unlock_irqrestore(&whc->lock, flags); if (!err) queue_work(whc->workqueue, &whc->periodic_work); - return 0; + return err; } /** -- cgit v0.10.2 From 8db324ec4322a15cf8819b8a7f0eff5aa98b2ff6 Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 8 Apr 2009 17:36:33 +0000 Subject: WUSB: disconnect all devices when stopping a WUSB HCD Make sure all WUSB devices are disconnected when stopping a WUSB HCD so that we don't leak the devices' wusb_dev structures. Signed-off-by: David Vrabel Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/wusbcore/devconnect.c b/drivers/usb/wusbcore/devconnect.c index 386eaa2..63f200e 100644 --- a/drivers/usb/wusbcore/devconnect.c +++ b/drivers/usb/wusbcore/devconnect.c @@ -396,7 +396,8 @@ static void __wusbhc_dev_disconnect(struct wusbhc *wusbhc, /* After a device disconnects, change the GTK (see [WUSB] * section 6.2.11.2). */ - wusbhc_gtk_rekey(wusbhc); + if (wusbhc->active) + wusbhc_gtk_rekey(wusbhc); /* The Wireless USB part has forgotten about the device already; now * khubd's timer will pick up the disconnection and remove the USB @@ -1084,15 +1085,21 @@ error_mmcie_set: * wusbhc_devconnect_stop - stop managing connected devices * @wusbhc: the WUSB HC * - * Removes the Host Info IE and stops the keep alives. - * - * FIXME: should this disconnect all devices? + * Disconnects any devices still connected, stops the keep alives and + * removes the Host Info IE. */ void wusbhc_devconnect_stop(struct wusbhc *wusbhc) { - cancel_delayed_work_sync(&wusbhc->keep_alive_timer); - WARN_ON(!list_empty(&wusbhc->cack_list)); + int i; + mutex_lock(&wusbhc->mutex); + for (i = 0; i < wusbhc->ports_max; i++) { + if (wusbhc->port[i].wusb_dev) + __wusbhc_dev_disconnect(wusbhc, &wusbhc->port[i]); + } + mutex_unlock(&wusbhc->mutex); + + cancel_delayed_work_sync(&wusbhc->keep_alive_timer); wusbhc_mmcie_rm(wusbhc, &wusbhc->wuie_host_info->hdr); kfree(wusbhc->wuie_host_info); wusbhc->wuie_host_info = NULL; -- cgit v0.10.2 From 5936ac7f93965931c508e1928d142076998ce65d Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 8 Apr 2009 17:36:32 +0000 Subject: WUSB: fix oops when completing URBs for disconnected devices Fix an oops in wusbhc_giveback_urb() if the wusb device had disconnected while an urb was in progress. Also release the ref count obtained here. Signed-off-by: David Vrabel Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/wusbcore/devconnect.c b/drivers/usb/wusbcore/devconnect.c index 63f200e..4ac4300 100644 --- a/drivers/usb/wusbcore/devconnect.c +++ b/drivers/usb/wusbcore/devconnect.c @@ -267,6 +267,8 @@ static void wusbhc_devconnect_acked_work(struct work_struct *work) mutex_lock(&wusbhc->mutex); wusbhc_devconnect_acked(wusbhc, wusb_dev); mutex_unlock(&wusbhc->mutex); + + wusb_dev_put(wusb_dev); } /* diff --git a/drivers/usb/wusbcore/wusbhc.c b/drivers/usb/wusbcore/wusbhc.c index 07c63a3..3638cc6 100644 --- a/drivers/usb/wusbcore/wusbhc.c +++ b/drivers/usb/wusbcore/wusbhc.c @@ -339,13 +339,15 @@ void wusbhc_giveback_urb(struct wusbhc *wusbhc, struct urb *urb, int status) { struct wusb_dev *wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev); - if (status == 0) { + if (status == 0 && wusb_dev) { wusb_dev->entry_ts = jiffies; - /* wusbhc_devconnect_acked() can't be called from from + /* wusbhc_devconnect_acked() can't be called from atomic context so defer it to a work queue. */ if (!list_empty(&wusb_dev->cack_node)) queue_work(wusbd, &wusb_dev->devconnect_acked_work); + else + wusb_dev_put(wusb_dev); } usb_hcd_giveback_urb(&wusbhc->usb_hcd, urb, status); -- cgit v0.10.2 From fca10c81d99ff9956179058460dfddc0418f3902 Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 8 Apr 2009 17:36:30 +0000 Subject: WUSB: correct format of wusb_chid sysfs file Make the wusb_chid sysfs file match the ABI documentation. Print all zeros if the WUSB host is stopped (instead of an empty file) and end the file with a newline. Signed-off-by: David Vrabel Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/wusbcore/wusbhc.c b/drivers/usb/wusbcore/wusbhc.c index 3638cc6..ee6256f 100644 --- a/drivers/usb/wusbcore/wusbhc.c +++ b/drivers/usb/wusbcore/wusbhc.c @@ -88,33 +88,31 @@ static DEVICE_ATTR(wusb_trust_timeout, 0644, wusb_trust_timeout_show, wusb_trust_timeout_store); /* - * Show & store the current WUSB CHID + * Show the current WUSB CHID. */ static ssize_t wusb_chid_show(struct device *dev, struct device_attribute *attr, char *buf) { struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev); + const struct wusb_ckhdid *chid; ssize_t result = 0; if (wusbhc->wuie_host_info != NULL) - result += ckhdid_printf(buf, PAGE_SIZE, - &wusbhc->wuie_host_info->CHID); + chid = &wusbhc->wuie_host_info->CHID; + else + chid = &wusb_ckhdid_zero; + + result += ckhdid_printf(buf, PAGE_SIZE, chid); + result += sprintf(buf + result, "\n"); + return result; } /* - * Store a new CHID - * - * This will (FIXME) trigger many changes. - * - * - Send an all zeros CHID and it will stop the controller - * - Send a non-zero CHID and it will start it - * (unless it was started, it will just change the CHID, - * diconnecting all devices first). + * Store a new CHID. * - * So first we scan the MMC we are sent and then we act on it. We - * read it in the same format as we print it, an ASCII string of 16 - * hex bytes. + * - Write an all zeros CHID and it will stop the controller + * - Write a non-zero CHID and it will start it. * * See wusbhc_chid_set() for more info. */ -- cgit v0.10.2