![Kirill Smelkov](/assets/img/avatar_default.png)
Using scripts/coccinelle/api/stream_open.cocci added in10dce8af34
("fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock"), search and convert to stream_open all in-kernel nonseekable_open users for which read and write actually do not depend on ppos and where there is no other methods in file_operations which assume @offset access. I've verified each generated change manually - that it is correct to convert - and each other nonseekable_open instance left - that it is either not correct to convert there, or that it is not converted due to current stream_open.cocci limitations. The script also does not convert files that should be valid to convert, but that currently have .llseek = noop_llseek or generic_file_llseek for unknown reason despite file being opened with nonseekable_open (e.g. drivers/input/mousedev.c) Among cases converted 14 were potentially vulnerable to read vs write deadlock (see details in10dce8af34
): drivers/char/pcmcia/cm4000_cs.c:1685:7-23: ERROR: cm4000_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/gnss/core.c:45:1-17: ERROR: gnss_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/hid/uhid.c:635:1-17: ERROR: uhid_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/infiniband/core/user_mad.c:988:1-17: ERROR: umad_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/input/evdev.c:527:1-17: ERROR: evdev_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/input/misc/uinput.c:401:1-17: ERROR: uinput_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/isdn/capi/capi.c:963:8-24: ERROR: capi_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/leds/uleds.c:77:1-17: ERROR: uleds_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/media/rc/lirc_dev.c:198:1-17: ERROR: lirc_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/s390/char/fs3270.c:488:1-17: ERROR: fs3270_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/usb/misc/ldusb.c:310:1-17: ERROR: ld_usb_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. drivers/xen/evtchn.c:667:8-24: ERROR: evtchn_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. net/batman-adv/icmp_socket.c:80:1-17: ERROR: batadv_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. net/rfkill/core.c:1146:8-24: ERROR: rfkill_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix. and the rest were just safe to convert to stream_open because their read and write do not use ppos at all and corresponding file_operations do not have methods that assume @offset file access(*): arch/powerpc/platforms/52xx/mpc52xx_gpt.c:631:8-24: WARNING: mpc52xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_ibox_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_ibox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_mbox_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_mbox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_wbox_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. arch/powerpc/platforms/cell/spufs/file.c:591:8-24: WARNING: spufs_wbox_stat_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. arch/um/drivers/harddog_kern.c:88:8-24: WARNING: harddog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. arch/x86/kernel/cpu/microcode/core.c:430:33-49: WARNING: microcode_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/char/ds1620.c:215:8-24: WARNING: ds1620_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/char/dtlk.c:301:1-17: WARNING: dtlk_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/char/ipmi/ipmi_watchdog.c:840:9-25: WARNING: ipmi_wdog_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/char/pcmcia/scr24x_cs.c:95:8-24: WARNING: scr24x_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/char/tb0219.c:246:9-25: WARNING: tb0219_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/firewire/nosy.c:306:8-24: WARNING: nosy_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/hwmon/fschmd.c:840:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/hwmon/w83793.c:1344:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/infiniband/core/ucma.c:1747:8-24: WARNING: ucma_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/infiniband/core/ucm.c:1178:8-24: WARNING: ucm_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/infiniband/core/uverbs_main.c:1086:8-24: WARNING: uverbs_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/input/joydev.c:282:1-17: WARNING: joydev_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/pci/switch/switchtec.c:393:1-17: WARNING: switchtec_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/platform/chrome/cros_ec_debugfs.c:135:8-24: WARNING: cros_ec_console_log_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/rtc/rtc-ds1374.c:470:9-25: WARNING: ds1374_wdt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/rtc/rtc-m41t80.c:805:9-25: WARNING: wdt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/s390/char/tape_char.c:293:2-18: WARNING: tape_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/s390/char/zcore.c:194:8-24: WARNING: zcore_reipl_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/s390/crypto/zcrypt_api.c:528:8-24: WARNING: zcrypt_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/spi/spidev.c:594:1-17: WARNING: spidev_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/staging/pi433/pi433_if.c:974:1-17: WARNING: pi433_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/acquirewdt.c:203:8-24: WARNING: acq_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/advantechwdt.c:202:8-24: WARNING: advwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/alim1535_wdt.c:252:8-24: WARNING: ali_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/alim7101_wdt.c:217:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/ar7_wdt.c:166:8-24: WARNING: ar7_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/at91rm9200_wdt.c:113:8-24: WARNING: at91wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/ath79_wdt.c:135:8-24: WARNING: ath79_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/bcm63xx_wdt.c:119:8-24: WARNING: bcm63xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/cpu5wdt.c:143:8-24: WARNING: cpu5wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/cpwd.c:397:8-24: WARNING: cpwd_fops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/eurotechwdt.c:319:8-24: WARNING: eurwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/f71808e_wdt.c:528:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/gef_wdt.c:232:8-24: WARNING: gef_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/geodewdt.c:95:8-24: WARNING: geodewdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/ib700wdt.c:241:8-24: WARNING: ibwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/ibmasr.c:326:8-24: WARNING: asr_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/indydog.c:80:8-24: WARNING: indydog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/intel_scu_watchdog.c:307:8-24: WARNING: intel_scu_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/iop_wdt.c:104:8-24: WARNING: iop_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/it8712f_wdt.c:330:8-24: WARNING: it8712f_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/ixp4xx_wdt.c:68:8-24: WARNING: ixp4xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/ks8695_wdt.c:145:8-24: WARNING: ks8695wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/m54xx_wdt.c:88:8-24: WARNING: m54xx_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/machzwd.c:336:8-24: WARNING: zf_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/mixcomwd.c:153:8-24: WARNING: mixcomwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/mtx-1_wdt.c:121:8-24: WARNING: mtx1_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/mv64x60_wdt.c:136:8-24: WARNING: mv64x60_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/nuc900_wdt.c:134:8-24: WARNING: nuc900wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/nv_tco.c:164:8-24: WARNING: nv_tco_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pc87413_wdt.c:289:8-24: WARNING: pc87413_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pcwd.c:698:8-24: WARNING: pcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pcwd.c:737:8-24: WARNING: pcwd_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pcwd_pci.c:581:8-24: WARNING: pcipcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pcwd_pci.c:623:8-24: WARNING: pcipcwd_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pcwd_usb.c:488:8-24: WARNING: usb_pcwd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pcwd_usb.c:527:8-24: WARNING: usb_pcwd_temperature_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pika_wdt.c:121:8-24: WARNING: pikawdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/pnx833x_wdt.c:119:8-24: WARNING: pnx833x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/rc32434_wdt.c:153:8-24: WARNING: rc32434_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/rdc321x_wdt.c:145:8-24: WARNING: rdc321x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/riowd.c:79:1-17: WARNING: riowd_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sa1100_wdt.c:62:8-24: WARNING: sa1100dog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sbc60xxwdt.c:211:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sbc7240_wdt.c:139:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sbc8360.c:274:8-24: WARNING: sbc8360_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sbc_epx_c3.c:81:8-24: WARNING: epx_c3_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sbc_fitpc2_wdt.c:78:8-24: WARNING: fitpc2_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sb_wdog.c:108:1-17: WARNING: sbwdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sc1200wdt.c:181:8-24: WARNING: sc1200wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sc520_wdt.c:261:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/sch311x_wdt.c:319:8-24: WARNING: sch311x_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/scx200_wdt.c:105:8-24: WARNING: scx200_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/smsc37b787_wdt.c:369:8-24: WARNING: wb_smsc_wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/w83877f_wdt.c:227:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/w83977f_wdt.c:301:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wafer5823wdt.c:200:8-24: WARNING: wafwdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/watchdog_dev.c:828:8-24: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdrtas.c:379:8-24: WARNING: wdrtas_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdrtas.c:445:8-24: WARNING: wdrtas_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdt285.c:104:1-17: WARNING: watchdog_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdt977.c:276:8-24: WARNING: wdt977_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdt.c:424:8-24: WARNING: wdt_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdt.c:484:8-24: WARNING: wdt_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdt_pci.c:464:8-24: WARNING: wdtpci_fops: .write() has stream semantic; safe to change nonseekable_open -> stream_open. drivers/watchdog/wdt_pci.c:527:8-24: WARNING: wdtpci_temp_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. net/batman-adv/log.c:105:1-17: WARNING: batadv_log_fops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. sound/core/control.c:57:7-23: WARNING: snd_ctl_f_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. sound/core/rawmidi.c:385:7-23: WARNING: snd_rawmidi_f_ops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. sound/core/seq/seq_clientmgr.c:310:7-23: WARNING: snd_seq_f_ops: .read() and .write() have stream semantic; safe to change nonseekable_open -> stream_open. sound/core/timer.c:1428:7-23: WARNING: snd_timer_f_ops: .read() has stream semantic; safe to change nonseekable_open -> stream_open. One can also recheck/review the patch via generating it with explanation comments included via $ make coccicheck MODE=patch COCCI=scripts/coccinelle/api/stream_open.cocci SPFLAGS="-D explain" (*) This second group also contains cases with read/write deadlocks that stream_open.cocci don't yet detect, but which are still valid to convert to stream_open since ppos is not used. For example drivers/pci/switch/switchtec.c calls wait_for_completion_interruptible() in its .read, but stream_open.cocci currently detects only "wait_event*" as blocking. Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Yongzhi Pan <panyongzhi@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Juergen Gross <jgross@suse.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: Tejun Heo <tj@kernel.org> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Nikolaus Rath <Nikolaus@rath.org> Cc: Han-Wen Nienhuys <hanwen@google.com> Cc: Anatolij Gustschin <agust@denx.de> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James R. Van Zandt" <jrv@vanzandt.mv.com> Cc: Corey Minyard <minyard@acm.org> Cc: Harald Welte <laforge@gnumonks.org> Acked-by: Lubomir Rintel <lkundrak@v3.sk> [scr24x_cs] Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: Johan Hovold <johan@kernel.org> Cc: David Herrmann <dh.herrmann@googlemail.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> Cc: Jean Delvare <jdelvare@suse.com> Acked-by: Guenter Roeck <linux@roeck-us.net> [watchdog/* hwmon/*] Cc: Rudolf Marek <r.marek@assembler.cz> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Logan Gunthorpe <logang@deltatee.com> [drivers/pci/switch/switchtec] Acked-by: Bjorn Helgaas <bhelgaas@google.com> [drivers/pci/switch/switchtec] Cc: Benson Leung <bleung@chromium.org> Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> [platform/chrome] Cc: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> [rtc/*] Cc: Mark Brown <broonie@kernel.org> Cc: Wim Van Sebroeck <wim@linux-watchdog.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: bcm-kernel-feedback-list@broadcom.com Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Zwane Mwaikambo <zwanem@gmail.com> Cc: Marek Lindner <mareklindner@neomailbox.ch> Cc: Simon Wunderlich <sw@simonwunderlich.de> Cc: Antonio Quartulli <a@unstable.cc> Cc: "David S. Miller" <davem@davemloft.net> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.com> Signed-off-by: Kirill Smelkov <kirr@nexedi.com>
663 lines
16 KiB
C
663 lines
16 KiB
C
/* -*- linux-c -*-
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* dtlk.c - DoubleTalk PC driver for Linux
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*
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* Original author: Chris Pallotta <chris@allmedia.com>
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* Current maintainer: Jim Van Zandt <jrv@vanzandt.mv.com>
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*
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* 2000-03-18 Jim Van Zandt: Fix polling.
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* Eliminate dtlk_timer_active flag and separate dtlk_stop_timer
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* function. Don't restart timer in dtlk_timer_tick. Restart timer
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* in dtlk_poll after every poll. dtlk_poll returns mask (duh).
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* Eliminate unused function dtlk_write_byte. Misc. code cleanups.
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*/
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/* This driver is for the DoubleTalk PC, a speech synthesizer
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manufactured by RC Systems (http://www.rcsys.com/). It was written
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based on documentation in their User's Manual file and Developer's
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Tools disk.
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The DoubleTalk PC contains four voice synthesizers: text-to-speech
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(TTS), linear predictive coding (LPC), PCM/ADPCM, and CVSD. It
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also has a tone generator. Output data for LPC are written to the
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LPC port, and output data for the other modes are written to the
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TTS port.
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Two kinds of data can be read from the DoubleTalk: status
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information (in response to the "\001?" interrogation command) is
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read from the TTS port, and index markers (which mark the progress
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of the speech) are read from the LPC port. Not all models of the
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DoubleTalk PC implement index markers. Both the TTS and LPC ports
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can also display status flags.
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The DoubleTalk PC generates no interrupts.
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These characteristics are mapped into the Unix stream I/O model as
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follows:
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"write" sends bytes to the TTS port. It is the responsibility of
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the user program to switch modes among TTS, PCM/ADPCM, and CVSD.
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This driver was written for use with the text-to-speech
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synthesizer. If LPC output is needed some day, other minor device
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numbers can be used to select among output modes.
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|
"read" gets index markers from the LPC port. If the device does
|
|
not implement index markers, the read will fail with error EINVAL.
|
|
|
|
Status information is available using the DTLK_INTERROGATE ioctl.
|
|
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#define KERNEL
|
|
#include <linux/types.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/errno.h> /* for -EBUSY */
|
|
#include <linux/ioport.h> /* for request_region */
|
|
#include <linux/delay.h> /* for loops_per_jiffy */
|
|
#include <linux/sched.h>
|
|
#include <linux/mutex.h>
|
|
#include <asm/io.h> /* for inb_p, outb_p, inb, outb, etc. */
|
|
#include <linux/uaccess.h> /* for get_user, etc. */
|
|
#include <linux/wait.h> /* for wait_queue */
|
|
#include <linux/init.h> /* for __init, module_{init,exit} */
|
|
#include <linux/poll.h> /* for EPOLLIN, etc. */
|
|
#include <linux/dtlk.h> /* local header file for DoubleTalk values */
|
|
|
|
#ifdef TRACING
|
|
#define TRACE_TEXT(str) printk(str);
|
|
#define TRACE_RET printk(")")
|
|
#else /* !TRACING */
|
|
#define TRACE_TEXT(str) ((void) 0)
|
|
#define TRACE_RET ((void) 0)
|
|
#endif /* TRACING */
|
|
|
|
static DEFINE_MUTEX(dtlk_mutex);
|
|
static void dtlk_timer_tick(struct timer_list *unused);
|
|
|
|
static int dtlk_major;
|
|
static int dtlk_port_lpc;
|
|
static int dtlk_port_tts;
|
|
static int dtlk_busy;
|
|
static int dtlk_has_indexing;
|
|
static unsigned int dtlk_portlist[] =
|
|
{0x25e, 0x29e, 0x2de, 0x31e, 0x35e, 0x39e, 0};
|
|
static wait_queue_head_t dtlk_process_list;
|
|
static DEFINE_TIMER(dtlk_timer, dtlk_timer_tick);
|
|
|
|
/* prototypes for file_operations struct */
|
|
static ssize_t dtlk_read(struct file *, char __user *,
|
|
size_t nbytes, loff_t * ppos);
|
|
static ssize_t dtlk_write(struct file *, const char __user *,
|
|
size_t nbytes, loff_t * ppos);
|
|
static __poll_t dtlk_poll(struct file *, poll_table *);
|
|
static int dtlk_open(struct inode *, struct file *);
|
|
static int dtlk_release(struct inode *, struct file *);
|
|
static long dtlk_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg);
|
|
|
|
static const struct file_operations dtlk_fops =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.read = dtlk_read,
|
|
.write = dtlk_write,
|
|
.poll = dtlk_poll,
|
|
.unlocked_ioctl = dtlk_ioctl,
|
|
.open = dtlk_open,
|
|
.release = dtlk_release,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
/* local prototypes */
|
|
static int dtlk_dev_probe(void);
|
|
static struct dtlk_settings *dtlk_interrogate(void);
|
|
static int dtlk_readable(void);
|
|
static char dtlk_read_lpc(void);
|
|
static char dtlk_read_tts(void);
|
|
static int dtlk_writeable(void);
|
|
static char dtlk_write_bytes(const char *buf, int n);
|
|
static char dtlk_write_tts(char);
|
|
/*
|
|
static void dtlk_handle_error(char, char, unsigned int);
|
|
*/
|
|
|
|
static ssize_t dtlk_read(struct file *file, char __user *buf,
|
|
size_t count, loff_t * ppos)
|
|
{
|
|
unsigned int minor = iminor(file_inode(file));
|
|
char ch;
|
|
int i = 0, retries;
|
|
|
|
TRACE_TEXT("(dtlk_read");
|
|
/* printk("DoubleTalk PC - dtlk_read()\n"); */
|
|
|
|
if (minor != DTLK_MINOR || !dtlk_has_indexing)
|
|
return -EINVAL;
|
|
|
|
for (retries = 0; retries < loops_per_jiffy; retries++) {
|
|
while (i < count && dtlk_readable()) {
|
|
ch = dtlk_read_lpc();
|
|
/* printk("dtlk_read() reads 0x%02x\n", ch); */
|
|
if (put_user(ch, buf++))
|
|
return -EFAULT;
|
|
i++;
|
|
}
|
|
if (i)
|
|
return i;
|
|
if (file->f_flags & O_NONBLOCK)
|
|
break;
|
|
msleep_interruptible(100);
|
|
}
|
|
if (retries == loops_per_jiffy)
|
|
printk(KERN_ERR "dtlk_read times out\n");
|
|
TRACE_RET;
|
|
return -EAGAIN;
|
|
}
|
|
|
|
static ssize_t dtlk_write(struct file *file, const char __user *buf,
|
|
size_t count, loff_t * ppos)
|
|
{
|
|
int i = 0, retries = 0, ch;
|
|
|
|
TRACE_TEXT("(dtlk_write");
|
|
#ifdef TRACING
|
|
printk(" \"");
|
|
{
|
|
int i, ch;
|
|
for (i = 0; i < count; i++) {
|
|
if (get_user(ch, buf + i))
|
|
return -EFAULT;
|
|
if (' ' <= ch && ch <= '~')
|
|
printk("%c", ch);
|
|
else
|
|
printk("\\%03o", ch);
|
|
}
|
|
printk("\"");
|
|
}
|
|
#endif
|
|
|
|
if (iminor(file_inode(file)) != DTLK_MINOR)
|
|
return -EINVAL;
|
|
|
|
while (1) {
|
|
while (i < count && !get_user(ch, buf) &&
|
|
(ch == DTLK_CLEAR || dtlk_writeable())) {
|
|
dtlk_write_tts(ch);
|
|
buf++;
|
|
i++;
|
|
if (i % 5 == 0)
|
|
/* We yield our time until scheduled
|
|
again. This reduces the transfer
|
|
rate to 500 bytes/sec, but that's
|
|
still enough to keep up with the
|
|
speech synthesizer. */
|
|
msleep_interruptible(1);
|
|
else {
|
|
/* the RDY bit goes zero 2-3 usec
|
|
after writing, and goes 1 again
|
|
180-190 usec later. Here, we wait
|
|
up to 250 usec for the RDY bit to
|
|
go nonzero. */
|
|
for (retries = 0;
|
|
retries < loops_per_jiffy / (4000/HZ);
|
|
retries++)
|
|
if (inb_p(dtlk_port_tts) &
|
|
TTS_WRITABLE)
|
|
break;
|
|
}
|
|
retries = 0;
|
|
}
|
|
if (i == count)
|
|
return i;
|
|
if (file->f_flags & O_NONBLOCK)
|
|
break;
|
|
|
|
msleep_interruptible(1);
|
|
|
|
if (++retries > 10 * HZ) { /* wait no more than 10 sec
|
|
from last write */
|
|
printk("dtlk: write timeout. "
|
|
"inb_p(dtlk_port_tts) = 0x%02x\n",
|
|
inb_p(dtlk_port_tts));
|
|
TRACE_RET;
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
TRACE_RET;
|
|
return -EAGAIN;
|
|
}
|
|
|
|
static __poll_t dtlk_poll(struct file *file, poll_table * wait)
|
|
{
|
|
__poll_t mask = 0;
|
|
unsigned long expires;
|
|
|
|
TRACE_TEXT(" dtlk_poll");
|
|
/*
|
|
static long int j;
|
|
printk(".");
|
|
printk("<%ld>", jiffies-j);
|
|
j=jiffies;
|
|
*/
|
|
poll_wait(file, &dtlk_process_list, wait);
|
|
|
|
if (dtlk_has_indexing && dtlk_readable()) {
|
|
del_timer(&dtlk_timer);
|
|
mask = EPOLLIN | EPOLLRDNORM;
|
|
}
|
|
if (dtlk_writeable()) {
|
|
del_timer(&dtlk_timer);
|
|
mask |= EPOLLOUT | EPOLLWRNORM;
|
|
}
|
|
/* there are no exception conditions */
|
|
|
|
/* There won't be any interrupts, so we set a timer instead. */
|
|
expires = jiffies + 3*HZ / 100;
|
|
mod_timer(&dtlk_timer, expires);
|
|
|
|
return mask;
|
|
}
|
|
|
|
static void dtlk_timer_tick(struct timer_list *unused)
|
|
{
|
|
TRACE_TEXT(" dtlk_timer_tick");
|
|
wake_up_interruptible(&dtlk_process_list);
|
|
}
|
|
|
|
static long dtlk_ioctl(struct file *file,
|
|
unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
char __user *argp = (char __user *)arg;
|
|
struct dtlk_settings *sp;
|
|
char portval;
|
|
TRACE_TEXT(" dtlk_ioctl");
|
|
|
|
switch (cmd) {
|
|
|
|
case DTLK_INTERROGATE:
|
|
mutex_lock(&dtlk_mutex);
|
|
sp = dtlk_interrogate();
|
|
mutex_unlock(&dtlk_mutex);
|
|
if (copy_to_user(argp, sp, sizeof(struct dtlk_settings)))
|
|
return -EINVAL;
|
|
return 0;
|
|
|
|
case DTLK_STATUS:
|
|
portval = inb_p(dtlk_port_tts);
|
|
return put_user(portval, argp);
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Note that nobody ever sets dtlk_busy... */
|
|
static int dtlk_open(struct inode *inode, struct file *file)
|
|
{
|
|
TRACE_TEXT("(dtlk_open");
|
|
|
|
switch (iminor(inode)) {
|
|
case DTLK_MINOR:
|
|
if (dtlk_busy)
|
|
return -EBUSY;
|
|
return stream_open(inode, file);
|
|
|
|
default:
|
|
return -ENXIO;
|
|
}
|
|
}
|
|
|
|
static int dtlk_release(struct inode *inode, struct file *file)
|
|
{
|
|
TRACE_TEXT("(dtlk_release");
|
|
|
|
switch (iminor(inode)) {
|
|
case DTLK_MINOR:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
TRACE_RET;
|
|
|
|
del_timer_sync(&dtlk_timer);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init dtlk_init(void)
|
|
{
|
|
int err;
|
|
|
|
dtlk_port_lpc = 0;
|
|
dtlk_port_tts = 0;
|
|
dtlk_busy = 0;
|
|
dtlk_major = register_chrdev(0, "dtlk", &dtlk_fops);
|
|
if (dtlk_major < 0) {
|
|
printk(KERN_ERR "DoubleTalk PC - cannot register device\n");
|
|
return dtlk_major;
|
|
}
|
|
err = dtlk_dev_probe();
|
|
if (err) {
|
|
unregister_chrdev(dtlk_major, "dtlk");
|
|
return err;
|
|
}
|
|
printk(", MAJOR %d\n", dtlk_major);
|
|
|
|
init_waitqueue_head(&dtlk_process_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit dtlk_cleanup (void)
|
|
{
|
|
dtlk_write_bytes("goodbye", 8);
|
|
msleep_interruptible(500); /* nap 0.50 sec but
|
|
could be awakened
|
|
earlier by
|
|
signals... */
|
|
|
|
dtlk_write_tts(DTLK_CLEAR);
|
|
unregister_chrdev(dtlk_major, "dtlk");
|
|
release_region(dtlk_port_lpc, DTLK_IO_EXTENT);
|
|
}
|
|
|
|
module_init(dtlk_init);
|
|
module_exit(dtlk_cleanup);
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static int dtlk_readable(void)
|
|
{
|
|
#ifdef TRACING
|
|
printk(" dtlk_readable=%u@%u", inb_p(dtlk_port_lpc) != 0x7f, jiffies);
|
|
#endif
|
|
return inb_p(dtlk_port_lpc) != 0x7f;
|
|
}
|
|
|
|
static int dtlk_writeable(void)
|
|
{
|
|
/* TRACE_TEXT(" dtlk_writeable"); */
|
|
#ifdef TRACINGMORE
|
|
printk(" dtlk_writeable=%u", (inb_p(dtlk_port_tts) & TTS_WRITABLE)!=0);
|
|
#endif
|
|
return inb_p(dtlk_port_tts) & TTS_WRITABLE;
|
|
}
|
|
|
|
static int __init dtlk_dev_probe(void)
|
|
{
|
|
unsigned int testval = 0;
|
|
int i = 0;
|
|
struct dtlk_settings *sp;
|
|
|
|
if (dtlk_port_lpc | dtlk_port_tts)
|
|
return -EBUSY;
|
|
|
|
for (i = 0; dtlk_portlist[i]; i++) {
|
|
#if 0
|
|
printk("DoubleTalk PC - Port %03x = %04x\n",
|
|
dtlk_portlist[i], (testval = inw_p(dtlk_portlist[i])));
|
|
#endif
|
|
|
|
if (!request_region(dtlk_portlist[i], DTLK_IO_EXTENT,
|
|
"dtlk"))
|
|
continue;
|
|
testval = inw_p(dtlk_portlist[i]);
|
|
if ((testval &= 0xfbff) == 0x107f) {
|
|
dtlk_port_lpc = dtlk_portlist[i];
|
|
dtlk_port_tts = dtlk_port_lpc + 1;
|
|
|
|
sp = dtlk_interrogate();
|
|
printk("DoubleTalk PC at %03x-%03x, "
|
|
"ROM version %s, serial number %u",
|
|
dtlk_portlist[i], dtlk_portlist[i] +
|
|
DTLK_IO_EXTENT - 1,
|
|
sp->rom_version, sp->serial_number);
|
|
|
|
/* put LPC port into known state, so
|
|
dtlk_readable() gives valid result */
|
|
outb_p(0xff, dtlk_port_lpc);
|
|
|
|
/* INIT string and index marker */
|
|
dtlk_write_bytes("\036\1@\0\0012I\r", 8);
|
|
/* posting an index takes 18 msec. Here, we
|
|
wait up to 100 msec to see whether it
|
|
appears. */
|
|
msleep_interruptible(100);
|
|
dtlk_has_indexing = dtlk_readable();
|
|
#ifdef TRACING
|
|
printk(", indexing %d\n", dtlk_has_indexing);
|
|
#endif
|
|
#ifdef INSCOPE
|
|
{
|
|
/* This macro records ten samples read from the LPC port, for later display */
|
|
#define LOOK \
|
|
for (i = 0; i < 10; i++) \
|
|
{ \
|
|
buffer[b++] = inb_p(dtlk_port_lpc); \
|
|
__delay(loops_per_jiffy/(1000000/HZ)); \
|
|
}
|
|
char buffer[1000];
|
|
int b = 0, i, j;
|
|
|
|
LOOK
|
|
outb_p(0xff, dtlk_port_lpc);
|
|
buffer[b++] = 0;
|
|
LOOK
|
|
dtlk_write_bytes("\0012I\r", 4);
|
|
buffer[b++] = 0;
|
|
__delay(50 * loops_per_jiffy / (1000/HZ));
|
|
outb_p(0xff, dtlk_port_lpc);
|
|
buffer[b++] = 0;
|
|
LOOK
|
|
|
|
printk("\n");
|
|
for (j = 0; j < b; j++)
|
|
printk(" %02x", buffer[j]);
|
|
printk("\n");
|
|
}
|
|
#endif /* INSCOPE */
|
|
|
|
#ifdef OUTSCOPE
|
|
{
|
|
/* This macro records ten samples read from the TTS port, for later display */
|
|
#define LOOK \
|
|
for (i = 0; i < 10; i++) \
|
|
{ \
|
|
buffer[b++] = inb_p(dtlk_port_tts); \
|
|
__delay(loops_per_jiffy/(1000000/HZ)); /* 1 us */ \
|
|
}
|
|
char buffer[1000];
|
|
int b = 0, i, j;
|
|
|
|
mdelay(10); /* 10 ms */
|
|
LOOK
|
|
outb_p(0x03, dtlk_port_tts);
|
|
buffer[b++] = 0;
|
|
LOOK
|
|
LOOK
|
|
|
|
printk("\n");
|
|
for (j = 0; j < b; j++)
|
|
printk(" %02x", buffer[j]);
|
|
printk("\n");
|
|
}
|
|
#endif /* OUTSCOPE */
|
|
|
|
dtlk_write_bytes("Double Talk found", 18);
|
|
|
|
return 0;
|
|
}
|
|
release_region(dtlk_portlist[i], DTLK_IO_EXTENT);
|
|
}
|
|
|
|
printk(KERN_INFO "DoubleTalk PC - not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
static void dtlk_handle_error(char op, char rc, unsigned int minor)
|
|
{
|
|
printk(KERN_INFO"\nDoubleTalk PC - MINOR: %d, OPCODE: %d, ERROR: %d\n",
|
|
minor, op, rc);
|
|
return;
|
|
}
|
|
*/
|
|
|
|
/* interrogate the DoubleTalk PC and return its settings */
|
|
static struct dtlk_settings *dtlk_interrogate(void)
|
|
{
|
|
unsigned char *t;
|
|
static char buf[sizeof(struct dtlk_settings) + 1];
|
|
int total, i;
|
|
static struct dtlk_settings status;
|
|
TRACE_TEXT("(dtlk_interrogate");
|
|
dtlk_write_bytes("\030\001?", 3);
|
|
for (total = 0, i = 0; i < 50; i++) {
|
|
buf[total] = dtlk_read_tts();
|
|
if (total > 2 && buf[total] == 0x7f)
|
|
break;
|
|
if (total < sizeof(struct dtlk_settings))
|
|
total++;
|
|
}
|
|
/*
|
|
if (i==50) printk("interrogate() read overrun\n");
|
|
for (i=0; i<sizeof(buf); i++)
|
|
printk(" %02x", buf[i]);
|
|
printk("\n");
|
|
*/
|
|
t = buf;
|
|
status.serial_number = t[0] + t[1] * 256; /* serial number is
|
|
little endian */
|
|
t += 2;
|
|
|
|
i = 0;
|
|
while (*t != '\r') {
|
|
status.rom_version[i] = *t;
|
|
if (i < sizeof(status.rom_version) - 1)
|
|
i++;
|
|
t++;
|
|
}
|
|
status.rom_version[i] = 0;
|
|
t++;
|
|
|
|
status.mode = *t++;
|
|
status.punc_level = *t++;
|
|
status.formant_freq = *t++;
|
|
status.pitch = *t++;
|
|
status.speed = *t++;
|
|
status.volume = *t++;
|
|
status.tone = *t++;
|
|
status.expression = *t++;
|
|
status.ext_dict_loaded = *t++;
|
|
status.ext_dict_status = *t++;
|
|
status.free_ram = *t++;
|
|
status.articulation = *t++;
|
|
status.reverb = *t++;
|
|
status.eob = *t++;
|
|
status.has_indexing = dtlk_has_indexing;
|
|
TRACE_RET;
|
|
return &status;
|
|
}
|
|
|
|
static char dtlk_read_tts(void)
|
|
{
|
|
int portval, retries = 0;
|
|
char ch;
|
|
TRACE_TEXT("(dtlk_read_tts");
|
|
|
|
/* verify DT is ready, read char, wait for ACK */
|
|
do {
|
|
portval = inb_p(dtlk_port_tts);
|
|
} while ((portval & TTS_READABLE) == 0 &&
|
|
retries++ < DTLK_MAX_RETRIES);
|
|
if (retries > DTLK_MAX_RETRIES)
|
|
printk(KERN_ERR "dtlk_read_tts() timeout\n");
|
|
|
|
ch = inb_p(dtlk_port_tts); /* input from TTS port */
|
|
ch &= 0x7f;
|
|
outb_p(ch, dtlk_port_tts);
|
|
|
|
retries = 0;
|
|
do {
|
|
portval = inb_p(dtlk_port_tts);
|
|
} while ((portval & TTS_READABLE) != 0 &&
|
|
retries++ < DTLK_MAX_RETRIES);
|
|
if (retries > DTLK_MAX_RETRIES)
|
|
printk(KERN_ERR "dtlk_read_tts() timeout\n");
|
|
|
|
TRACE_RET;
|
|
return ch;
|
|
}
|
|
|
|
static char dtlk_read_lpc(void)
|
|
{
|
|
int retries = 0;
|
|
char ch;
|
|
TRACE_TEXT("(dtlk_read_lpc");
|
|
|
|
/* no need to test -- this is only called when the port is readable */
|
|
|
|
ch = inb_p(dtlk_port_lpc); /* input from LPC port */
|
|
|
|
outb_p(0xff, dtlk_port_lpc);
|
|
|
|
/* acknowledging a read takes 3-4
|
|
usec. Here, we wait up to 20 usec
|
|
for the acknowledgement */
|
|
retries = (loops_per_jiffy * 20) / (1000000/HZ);
|
|
while (inb_p(dtlk_port_lpc) != 0x7f && --retries > 0);
|
|
if (retries == 0)
|
|
printk(KERN_ERR "dtlk_read_lpc() timeout\n");
|
|
|
|
TRACE_RET;
|
|
return ch;
|
|
}
|
|
|
|
/* write n bytes to tts port */
|
|
static char dtlk_write_bytes(const char *buf, int n)
|
|
{
|
|
char val = 0;
|
|
/* printk("dtlk_write_bytes(\"%-*s\", %d)\n", n, buf, n); */
|
|
TRACE_TEXT("(dtlk_write_bytes");
|
|
while (n-- > 0)
|
|
val = dtlk_write_tts(*buf++);
|
|
TRACE_RET;
|
|
return val;
|
|
}
|
|
|
|
static char dtlk_write_tts(char ch)
|
|
{
|
|
int retries = 0;
|
|
#ifdef TRACINGMORE
|
|
printk(" dtlk_write_tts(");
|
|
if (' ' <= ch && ch <= '~')
|
|
printk("'%c'", ch);
|
|
else
|
|
printk("0x%02x", ch);
|
|
#endif
|
|
if (ch != DTLK_CLEAR) /* no flow control for CLEAR command */
|
|
while ((inb_p(dtlk_port_tts) & TTS_WRITABLE) == 0 &&
|
|
retries++ < DTLK_MAX_RETRIES) /* DT ready? */
|
|
;
|
|
if (retries > DTLK_MAX_RETRIES)
|
|
printk(KERN_ERR "dtlk_write_tts() timeout\n");
|
|
|
|
outb_p(ch, dtlk_port_tts); /* output to TTS port */
|
|
/* the RDY bit goes zero 2-3 usec after writing, and goes
|
|
1 again 180-190 usec later. Here, we wait up to 10
|
|
usec for the RDY bit to go zero. */
|
|
for (retries = 0; retries < loops_per_jiffy / (100000/HZ); retries++)
|
|
if ((inb_p(dtlk_port_tts) & TTS_WRITABLE) == 0)
|
|
break;
|
|
|
|
#ifdef TRACINGMORE
|
|
printk(")\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|