From 7546dd97d27306d939c13e03318aae695badaa88 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 9 Mar 2009 08:18:29 +0000 Subject: net: convert usage of packet_type to read_mostly Protocols that use packet_type can be __read_mostly section for better locality. Elminate any unnecessary initializations of NULL. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- drivers/block/aoe/aoenet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/block') diff --git a/drivers/block/aoe/aoenet.c b/drivers/block/aoe/aoenet.c index c6099ba..ce0d62c 100644 --- a/drivers/block/aoe/aoenet.c +++ b/drivers/block/aoe/aoenet.c @@ -151,7 +151,7 @@ exit: return 0; } -static struct packet_type aoe_pt = { +static struct packet_type aoe_pt __read_mostly = { .type = __constant_htons(ETH_P_AOE), .func = aoenet_rcv, }; -- cgit v1.1 From 10cbda97e73c7d537d7174eadb2d098484f8f1da Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 27 Feb 2009 20:14:20 +0100 Subject: cciss: add BUILD_BUG_ON() for catching bad CommandList_struct alignment The hardware requires 64-bit alignment of commands, so add a build bug check for that. The recent commit 8a3173de4ab4cdacc43675dc5c077f9a5bf17f5f didn't change the size of the command, but other additions/changes may and thus break badly at runtime. Signed-off-by: Jens Axboe --- drivers/block/cciss.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/block') diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 4f9b6d7..5d0e135 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -3898,6 +3898,13 @@ static struct pci_driver cciss_pci_driver = { */ static int __init cciss_init(void) { + /* + * The hardware requires that commands are aligned on a 64-bit + * boundary. Given that we use pci_alloc_consistent() to allocate an + * array of them, the size must be a multiple of 8 bytes. + */ + BUILD_BUG_ON(sizeof(CommandList_struct) % 8); + printk(KERN_INFO DRIVER_NAME "\n"); /* Register for our PCI devices */ -- cgit v1.1 From 0061d38642244892e17156f005bd7055fe744644 Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Mon, 16 Mar 2009 10:06:05 +0100 Subject: cpqarray: enable bus mastering We've been carrying this patch for the last 3 years in Fedora, long past time we got it upstream... Call pci_set_master to enable bus-mastering if the BIOS hasn't done it already. Signed-off-by: Kyle McMartin Signed-off-by: Dave Jones Signed-off-by: Jens Axboe --- drivers/block/cpqarray.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/block') diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c index 5d39df1..ca268ca 100644 --- a/drivers/block/cpqarray.c +++ b/drivers/block/cpqarray.c @@ -617,6 +617,7 @@ static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev) int i; c->pci_dev = pdev; + pci_set_master(pdev); if (pci_enable_device(pdev)) { printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n"); return -1; -- cgit v1.1 From 68db1961bbf4e16c220ccec4a780e966bc1fece3 Mon Sep 17 00:00:00 2001 From: Nikanth Karthikesan Date: Tue, 24 Mar 2009 12:29:54 +0100 Subject: loop: support barrier writes Honour barrier requests in the loop back block device driver. In case of barrier bios, flush the backing file once before processing the barrier and once after to guarantee ordering. In case of filesystems that does not support fsync, barrier bios would be failed with -EOPNOTSUPP. Signed-off-by: Nikanth Karthikesan Signed-off-by: Jens Axboe --- drivers/block/loop.c | 32 ++++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) (limited to 'drivers/block') diff --git a/drivers/block/loop.c b/drivers/block/loop.c index bf03455..9721d10 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -474,10 +474,35 @@ static int do_bio_filebacked(struct loop_device *lo, struct bio *bio) int ret; pos = ((loff_t) bio->bi_sector << 9) + lo->lo_offset; - if (bio_rw(bio) == WRITE) + + if (bio_rw(bio) == WRITE) { + int barrier = bio_barrier(bio); + struct file *file = lo->lo_backing_file; + + if (barrier) { + if (unlikely(!file->f_op->fsync)) { + ret = -EOPNOTSUPP; + goto out; + } + + ret = vfs_fsync(file, file->f_path.dentry, 0); + if (unlikely(ret)) { + ret = -EIO; + goto out; + } + } + ret = lo_send(lo, bio, pos); - else + + if (barrier && !ret) { + ret = vfs_fsync(file, file->f_path.dentry, 0); + if (unlikely(ret)) + ret = -EIO; + } + } else ret = lo_receive(lo, bio, lo->lo_blocksize, pos); + +out: return ret; } @@ -826,6 +851,9 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode, lo->lo_queue->queuedata = lo; lo->lo_queue->unplug_fn = loop_unplug; + if (!(lo_flags & LO_FLAGS_READ_ONLY) && file->f_op->fsync) + blk_queue_ordered(lo->lo_queue, QUEUE_ORDERED_DRAIN, NULL); + set_capacity(lo->lo_disk, size); bd_set_size(bdev, size << 9); -- cgit v1.1 From db5e6df172309c382982790aafa8cd87dc0b6292 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Mon, 29 Dec 2008 11:19:10 +0100 Subject: USB: ub: use USB API functions rather than constants This set of patches introduces calls to the following set of functions: usb_endpoint_dir_in(epd) usb_endpoint_dir_out(epd) usb_endpoint_is_bulk_in(epd) usb_endpoint_is_bulk_out(epd) usb_endpoint_is_int_in(epd) usb_endpoint_is_int_out(epd) usb_endpoint_num(epd) usb_endpoint_type(epd) usb_endpoint_xfer_bulk(epd) usb_endpoint_xfer_control(epd) usb_endpoint_xfer_int(epd) usb_endpoint_xfer_isoc(epd) In some cases, introducing one of these functions is not possible, and it just replaces an explicit integer value by one of the following constants: USB_ENDPOINT_XFER_BULK USB_ENDPOINT_XFER_CONTROL USB_ENDPOINT_XFER_INT USB_ENDPOINT_XFER_ISOC An extract of the semantic patch that makes these changes is as follows: (http://www.emn.fr/x-info/coccinelle/) // @r1@ struct usb_endpoint_descriptor *epd; @@ - ((epd->bmAttributes & \(USB_ENDPOINT_XFERTYPE_MASK\|3\)) == - \(USB_ENDPOINT_XFER_CONTROL\|0\)) + usb_endpoint_xfer_control(epd) @r5@ struct usb_endpoint_descriptor *epd; @@ - ((epd->bEndpointAddress & \(USB_ENDPOINT_DIR_MASK\|0x80\)) == - \(USB_DIR_IN\|0x80\)) + usb_endpoint_dir_in(epd) @inc@ @@ #include @depends on !inc && (r1||r5)@ @@ + #include #include // Signed-off-by: Julia Lawall Signed-off-by: Greg Kroah-Hartman --- drivers/block/ub.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'drivers/block') diff --git a/drivers/block/ub.c b/drivers/block/ub.c index 12fb816..b36b84f 100644 --- a/drivers/block/ub.c +++ b/drivers/block/ub.c @@ -2146,10 +2146,9 @@ static int ub_get_pipes(struct ub_dev *sc, struct usb_device *dev, ep = &altsetting->endpoint[i].desc; /* Is it a BULK endpoint? */ - if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) - == USB_ENDPOINT_XFER_BULK) { + if (usb_endpoint_xfer_bulk(ep)) { /* BULK in or out? */ - if (ep->bEndpointAddress & USB_DIR_IN) { + if (usb_endpoint_dir_in(ep)) { if (ep_in == NULL) ep_in = ep; } else { @@ -2168,9 +2167,9 @@ static int ub_get_pipes(struct ub_dev *sc, struct usb_device *dev, sc->send_ctrl_pipe = usb_sndctrlpipe(dev, 0); sc->recv_ctrl_pipe = usb_rcvctrlpipe(dev, 0); sc->send_bulk_pipe = usb_sndbulkpipe(dev, - ep_out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); + usb_endpoint_num(ep_out)); sc->recv_bulk_pipe = usb_rcvbulkpipe(dev, - ep_in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); + usb_endpoint_num(ep_in)); return 0; } -- cgit v1.1 From e6e244b6cb1f70e7109381626293cd40a8334ed3 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 12 Feb 2009 14:47:44 -0500 Subject: usb-storage: prepare for subdriver separation This patch (as1206) is the first step in converting usb-storage's subdrivers into separate modules. It makes the following large-scale changes: Remove a bunch of unnecessary #ifdef's from usb_usual.h. Not truly necessary, but it does clean things up. Move the USB device-ID table (which is duplicated between libusual and usb-storage) into its own source file, usual-tables.c, and arrange for this to be linked with either libusual or usb-storage according to whether USB_LIBUSUAL is configured. Add to usual-tables.c a new usb_usual_ignore_device() function to detect whether a particular device needs to be managed by a subdriver and not by the standard handlers in usb-storage. Export a whole bunch of functions in usb-storage, renaming some of them because their names don't already begin with "usb_stor_". These functions will be needed by the new subdriver modules. Split usb-storage's probe routine into two functions. The subdrivers will call the probe1 routine, then fill in their transport and protocol settings, and then call the probe2 routine. Take the default cases and error checking out of get_transport() and get_protocol(), which run during probe1, and instead put a check for invalid transport or protocol values into the probe2 function. Add a new probe routine to be used for standard devices, i.e., those that don't need a subdriver. This new routine checks whether the device should be ignored (because it should be handled by ub or by a subdriver), and if not, calls the probe1 and probe2 functions. Signed-off-by: Alan Stern CC: Matthew Dharm Signed-off-by: Greg Kroah-Hartman --- drivers/block/ub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/block') diff --git a/drivers/block/ub.c b/drivers/block/ub.c index b36b84f..69b7f8e 100644 --- a/drivers/block/ub.c +++ b/drivers/block/ub.c @@ -391,7 +391,7 @@ static int ub_probe_lun(struct ub_dev *sc, int lnum); */ #ifdef CONFIG_USB_LIBUSUAL -#define ub_usb_ids storage_usb_ids +#define ub_usb_ids usb_storage_usb_ids #else static struct usb_device_id ub_usb_ids[] = { -- cgit v1.1 From 71b3e0c1ad90f28e34c105069175cbd4edb43dfa Mon Sep 17 00:00:00 2001 From: Eric Miao Date: Sat, 31 Jan 2009 22:47:44 +0800 Subject: platform: make better use of to_platform_{device,driver}() macros This helps the code look more consistent and cleaner. Signed-off-by: Eric Miao Cc: Kay Sievers Signed-off-by: Greg Kroah-Hartman --- drivers/block/floppy.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/block') diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 83d8ed3..c2c95e6 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -4135,10 +4135,9 @@ static int have_no_fdc = -ENODEV; static ssize_t floppy_cmos_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct platform_device *p; + struct platform_device *p = to_platform_device(dev); int drive; - p = container_of(dev, struct platform_device,dev); drive = p->id; return sprintf(buf, "%X\n", UDP->cmos); } -- cgit v1.1 From f028f3b2f987ebc61cef382ab7a5c449917b728e Mon Sep 17 00:00:00 2001 From: Nikanth Karthikesan Date: Tue, 24 Mar 2009 12:33:41 +0100 Subject: loop: fix circular locking in loop_clr_fd() With CONFIG_PROVE_LOCKING enabled $ losetup /dev/loop0 file $ losetup -o 32256 /dev/loop1 /dev/loop0 $ losetup -d /dev/loop1 $ losetup -d /dev/loop0 triggers a [ INFO: possible circular locking dependency detected ] I think this warning is a false positive. Open/close on a loop device acquires bd_mutex of the device before acquiring lo_ctl_mutex of the same device. For ioctl(LOOP_CLR_FD) after acquiring lo_ctl_mutex, fput on the backing_file might acquire the bd_mutex of a device, if backing file is a device and this is the last reference to the file being dropped . But it is guaranteed that it is impossible to have a circular list of backing devices.(say loop2->loop1->loop0->loop2 is not possible), which guarantees that this can never deadlock. So this warning should be suppressed. It is very difficult to annotate lockdep not to warn here in the correct way. A simple way to silence lockdep could be to mark the lo_ctl_mutex in ioctl to be a sub class, but this might mask some other real bugs. @@ -1164,7 +1164,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode, struct loop_device *lo = bdev->bd_disk->private_data; int err; - mutex_lock(&lo->lo_ctl_mutex); + mutex_lock_nested(&lo->lo_ctl_mutex, 1); switch (cmd) { case LOOP_SET_FD: err = loop_set_fd(lo, mode, bdev, arg); Or actually marking the bd_mutex after lo_ctl_mutex as a sub class could be a better solution. Luckily it is easy to avoid calling fput on backing file with lo_ctl_mutex held, so no lockdep annotation is required. If you do not like the special handling of the lo_ctl_mutex just for the LOOP_CLR_FD ioctl in lo_ioctl(), the mutex handling could be moved inside each of the individual ioctl handlers and I could send you another patch. Signed-off-by: Jens Axboe --- drivers/block/loop.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'drivers/block') diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 9721d10..2621ed2 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -969,11 +969,18 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev) bd_set_size(bdev, 0); mapping_set_gfp_mask(filp->f_mapping, gfp); lo->lo_state = Lo_unbound; - fput(filp); /* This is safe: open() is still holding a reference. */ module_put(THIS_MODULE); if (max_part > 0) ioctl_by_bdev(bdev, BLKRRPART, 0); + mutex_unlock(&lo->lo_ctl_mutex); + /* + * Need not hold lo_ctl_mutex to fput backing file. + * Calling fput holding lo_ctl_mutex triggers a circular + * lock dependency possibility warning as fput can take + * bd_mutex which is usually taken before lo_ctl_mutex. + */ + fput(filp); return 0; } @@ -1191,7 +1198,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode, struct loop_device *lo = bdev->bd_disk->private_data; int err; - mutex_lock(&lo->lo_ctl_mutex); + mutex_lock_nested(&lo->lo_ctl_mutex, 1); switch (cmd) { case LOOP_SET_FD: err = loop_set_fd(lo, mode, bdev, arg); @@ -1200,7 +1207,10 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode, err = loop_change_fd(lo, bdev, arg); break; case LOOP_CLR_FD: + /* loop_clr_fd would have unlocked lo_ctl_mutex on success */ err = loop_clr_fd(lo, bdev); + if (!err) + goto out_unlocked; break; case LOOP_SET_STATUS: err = loop_set_status_old(lo, (struct loop_info __user *) arg); @@ -1218,6 +1228,8 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode, err = lo->ioctl ? lo->ioctl(lo, cmd, arg) : -EINVAL; } mutex_unlock(&lo->lo_ctl_mutex); + +out_unlocked: return err; } -- cgit v1.1 From 8852ecd97488249ca7fe2c0d3eb44cae95886881 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Sat, 15 Nov 2008 16:10:10 +0100 Subject: m68k: mac - Add SWIM floppy support It allows to read data from a floppy, but not to write to, and to eject the floppy (useful on our Mac without eject button). Signed-off-by: Laurent Vivier Signed-off-by: Geert Uytterhoeven --- drivers/block/Kconfig | 7 + drivers/block/Makefile | 3 + drivers/block/swim.c | 995 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/block/swim_asm.S | 247 ++++++++++++ 4 files changed, 1252 insertions(+) create mode 100644 drivers/block/swim.c create mode 100644 drivers/block/swim_asm.S (limited to 'drivers/block') diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 0344a8a..e7b8aa0 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -45,6 +45,13 @@ config MAC_FLOPPY If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple) floppy controller, say Y here. Most commonly found in PowerMacs. +config BLK_DEV_SWIM + tristate "Support for SWIM Macintosh floppy" + depends on M68K && MAC + help + You should select this option if you want floppy support + and you don't have a II, IIfx, Q900, Q950 or AV series. + config AMIGA_Z2RAM tristate "Amiga Zorro II ramdisk support" depends on ZORRO diff --git a/drivers/block/Makefile b/drivers/block/Makefile index 87e120e..3145141 100644 --- a/drivers/block/Makefile +++ b/drivers/block/Makefile @@ -6,6 +6,7 @@ # obj-$(CONFIG_MAC_FLOPPY) += swim3.o +obj-$(CONFIG_BLK_DEV_SWIM) += swim_mod.o obj-$(CONFIG_BLK_DEV_FD) += floppy.o obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o obj-$(CONFIG_PS3_DISK) += ps3disk.o @@ -33,3 +34,5 @@ obj-$(CONFIG_BLK_DEV_UB) += ub.o obj-$(CONFIG_BLK_DEV_HD) += hd.o obj-$(CONFIG_XEN_BLKDEV_FRONTEND) += xen-blkfront.o + +swim_mod-objs := swim.o swim_asm.o diff --git a/drivers/block/swim.c b/drivers/block/swim.c new file mode 100644 index 0000000..d22cc38 --- /dev/null +++ b/drivers/block/swim.c @@ -0,0 +1,995 @@ +/* + * Driver for SWIM (Sander Woz Integrated Machine) floppy controller + * + * Copyright (C) 2004,2008 Laurent Vivier + * + * based on Alastair Bridgewater SWIM analysis, 2001 + * based on SWIM3 driver (c) Paul Mackerras, 1996 + * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * 2004-08-21 (lv) - Initial implementation + * 2008-10-30 (lv) - Port to 2.6 + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define CARDNAME "swim" + +struct sector_header { + unsigned char side; + unsigned char track; + unsigned char sector; + unsigned char size; + unsigned char crc0; + unsigned char crc1; +} __attribute__((packed)); + +#define DRIVER_VERSION "Version 0.2 (2008-10-30)" + +#define REG(x) unsigned char x, x ## _pad[0x200 - 1]; + +struct swim { + REG(write_data) + REG(write_mark) + REG(write_CRC) + REG(write_parameter) + REG(write_phase) + REG(write_setup) + REG(write_mode0) + REG(write_mode1) + + REG(read_data) + REG(read_mark) + REG(read_error) + REG(read_parameter) + REG(read_phase) + REG(read_setup) + REG(read_status) + REG(read_handshake) +} __attribute__((packed)); + +#define swim_write(base, reg, v) out_8(&(base)->write_##reg, (v)) +#define swim_read(base, reg) in_8(&(base)->read_##reg) + +/* IWM registers */ + +struct iwm { + REG(ph0L) + REG(ph0H) + REG(ph1L) + REG(ph1H) + REG(ph2L) + REG(ph2H) + REG(ph3L) + REG(ph3H) + REG(mtrOff) + REG(mtrOn) + REG(intDrive) + REG(extDrive) + REG(q6L) + REG(q6H) + REG(q7L) + REG(q7H) +} __attribute__((packed)); + +#define iwm_write(base, reg, v) out_8(&(base)->reg, (v)) +#define iwm_read(base, reg) in_8(&(base)->reg) + +/* bits in phase register */ + +#define SEEK_POSITIVE 0x070 +#define SEEK_NEGATIVE 0x074 +#define STEP 0x071 +#define MOTOR_ON 0x072 +#define MOTOR_OFF 0x076 +#define INDEX 0x073 +#define EJECT 0x077 +#define SETMFM 0x171 +#define SETGCR 0x175 + +#define RELAX 0x033 +#define LSTRB 0x008 + +#define CA_MASK 0x077 + +/* Select values for swim_select and swim_readbit */ + +#define READ_DATA_0 0x074 +#define TWOMEG_DRIVE 0x075 +#define SINGLE_SIDED 0x076 +#define DRIVE_PRESENT 0x077 +#define DISK_IN 0x170 +#define WRITE_PROT 0x171 +#define TRACK_ZERO 0x172 +#define TACHO 0x173 +#define READ_DATA_1 0x174 +#define MFM_MODE 0x175 +#define SEEK_COMPLETE 0x176 +#define ONEMEG_MEDIA 0x177 + +/* Bits in handshake register */ + +#define MARK_BYTE 0x01 +#define CRC_ZERO 0x02 +#define RDDATA 0x04 +#define SENSE 0x08 +#define MOTEN 0x10 +#define ERROR 0x20 +#define DAT2BYTE 0x40 +#define DAT1BYTE 0x80 + +/* bits in setup register */ + +#define S_INV_WDATA 0x01 +#define S_3_5_SELECT 0x02 +#define S_GCR 0x04 +#define S_FCLK_DIV2 0x08 +#define S_ERROR_CORR 0x10 +#define S_IBM_DRIVE 0x20 +#define S_GCR_WRITE 0x40 +#define S_TIMEOUT 0x80 + +/* bits in mode register */ + +#define CLFIFO 0x01 +#define ENBL1 0x02 +#define ENBL2 0x04 +#define ACTION 0x08 +#define WRITE_MODE 0x10 +#define HEDSEL 0x20 +#define MOTON 0x80 + +/*----------------------------------------------------------------------------*/ + +enum drive_location { + INTERNAL_DRIVE = 0x02, + EXTERNAL_DRIVE = 0x04, +}; + +enum media_type { + DD_MEDIA, + HD_MEDIA, +}; + +struct floppy_state { + + /* physical properties */ + + enum drive_location location; /* internal or external drive */ + int head_number; /* single- or double-sided drive */ + + /* media */ + + int disk_in; + int ejected; + enum media_type type; + int write_protected; + + int total_secs; + int secpercyl; + int secpertrack; + + /* in-use information */ + + int track; + int ref_count; + + struct gendisk *disk; + + /* parent controller */ + + struct swim_priv *swd; +}; + +enum motor_action { + OFF, + ON, +}; + +enum head { + LOWER_HEAD = 0, + UPPER_HEAD = 1, +}; + +#define FD_MAX_UNIT 2 + +struct swim_priv { + struct swim __iomem *base; + spinlock_t lock; + struct request_queue *queue; + int floppy_count; + struct floppy_state unit[FD_MAX_UNIT]; +}; + +extern int swim_read_sector_header(struct swim __iomem *base, + struct sector_header *header); +extern int swim_read_sector_data(struct swim __iomem *base, + unsigned char *data); + +static inline void set_swim_mode(struct swim __iomem *base, int enable) +{ + struct iwm __iomem *iwm_base; + unsigned long flags; + + if (!enable) { + swim_write(base, mode0, 0xf8); + return; + } + + iwm_base = (struct iwm __iomem *)base; + local_irq_save(flags); + + iwm_read(iwm_base, q7L); + iwm_read(iwm_base, mtrOff); + iwm_read(iwm_base, q6H); + + iwm_write(iwm_base, q7H, 0x57); + iwm_write(iwm_base, q7H, 0x17); + iwm_write(iwm_base, q7H, 0x57); + iwm_write(iwm_base, q7H, 0x57); + + local_irq_restore(flags); +} + +static inline int get_swim_mode(struct swim __iomem *base) +{ + unsigned long flags; + + local_irq_save(flags); + + swim_write(base, phase, 0xf5); + if (swim_read(base, phase) != 0xf5) + goto is_iwm; + swim_write(base, phase, 0xf6); + if (swim_read(base, phase) != 0xf6) + goto is_iwm; + swim_write(base, phase, 0xf7); + if (swim_read(base, phase) != 0xf7) + goto is_iwm; + local_irq_restore(flags); + return 1; +is_iwm: + local_irq_restore(flags); + return 0; +} + +static inline void swim_select(struct swim __iomem *base, int sel) +{ + swim_write(base, phase, RELAX); + + via1_set_head(sel & 0x100); + + swim_write(base, phase, sel & CA_MASK); +} + +static inline void swim_action(struct swim __iomem *base, int action) +{ + unsigned long flags; + + local_irq_save(flags); + + swim_select(base, action); + udelay(1); + swim_write(base, phase, (LSTRB<<4) | LSTRB); + udelay(1); + swim_write(base, phase, (LSTRB<<4) | ((~LSTRB) & 0x0F)); + udelay(1); + + local_irq_restore(flags); +} + +static inline int swim_readbit(struct swim __iomem *base, int bit) +{ + int stat; + + swim_select(base, bit); + + udelay(10); + + stat = swim_read(base, handshake); + + return (stat & SENSE) == 0; +} + +static inline void swim_drive(struct swim __iomem *base, + enum drive_location location) +{ + if (location == INTERNAL_DRIVE) { + swim_write(base, mode0, EXTERNAL_DRIVE); /* clear drive 1 bit */ + swim_write(base, mode1, INTERNAL_DRIVE); /* set drive 0 bit */ + } else if (location == EXTERNAL_DRIVE) { + swim_write(base, mode0, INTERNAL_DRIVE); /* clear drive 0 bit */ + swim_write(base, mode1, EXTERNAL_DRIVE); /* set drive 1 bit */ + } +} + +static inline void swim_motor(struct swim __iomem *base, + enum motor_action action) +{ + if (action == ON) { + int i; + + swim_action(base, MOTOR_ON); + + for (i = 0; i < 2*HZ; i++) { + swim_select(base, RELAX); + if (swim_readbit(base, MOTOR_ON)) + break; + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(1); + } + } else if (action == OFF) { + swim_action(base, MOTOR_OFF); + swim_select(base, RELAX); + } +} + +static inline void swim_eject(struct swim __iomem *base) +{ + int i; + + swim_action(base, EJECT); + + for (i = 0; i < 2*HZ; i++) { + swim_select(base, RELAX); + if (!swim_readbit(base, DISK_IN)) + break; + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(1); + } + swim_select(base, RELAX); +} + +static inline void swim_head(struct swim __iomem *base, enum head head) +{ + /* wait drive is ready */ + + if (head == UPPER_HEAD) + swim_select(base, READ_DATA_1); + else if (head == LOWER_HEAD) + swim_select(base, READ_DATA_0); +} + +static inline int swim_step(struct swim __iomem *base) +{ + int wait; + + swim_action(base, STEP); + + for (wait = 0; wait < HZ; wait++) { + + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(1); + + swim_select(base, RELAX); + if (!swim_readbit(base, STEP)) + return 0; + } + return -1; +} + +static inline int swim_track00(struct swim __iomem *base) +{ + int try; + + swim_action(base, SEEK_NEGATIVE); + + for (try = 0; try < 100; try++) { + + swim_select(base, RELAX); + if (swim_readbit(base, TRACK_ZERO)) + break; + + if (swim_step(base)) + return -1; + } + + if (swim_readbit(base, TRACK_ZERO)) + return 0; + + return -1; +} + +static inline int swim_seek(struct swim __iomem *base, int step) +{ + if (step == 0) + return 0; + + if (step < 0) { + swim_action(base, SEEK_NEGATIVE); + step = -step; + } else + swim_action(base, SEEK_POSITIVE); + + for ( ; step > 0; step--) { + if (swim_step(base)) + return -1; + } + + return 0; +} + +static inline int swim_track(struct floppy_state *fs, int track) +{ + struct swim __iomem *base = fs->swd->base; + int ret; + + ret = swim_seek(base, track - fs->track); + + if (ret == 0) + fs->track = track; + else { + swim_track00(base); + fs->track = 0; + } + + return ret; +} + +static int floppy_eject(struct floppy_state *fs) +{ + struct swim __iomem *base = fs->swd->base; + + swim_drive(base, fs->location); + swim_motor(base, OFF); + swim_eject(base); + + fs->disk_in = 0; + fs->ejected = 1; + + return 0; +} + +static inline int swim_read_sector(struct floppy_state *fs, + int side, int track, + int sector, unsigned char *buffer) +{ + struct swim __iomem *base = fs->swd->base; + unsigned long flags; + struct sector_header header; + int ret = -1; + short i; + + swim_track(fs, track); + + swim_write(base, mode1, MOTON); + swim_head(base, side); + swim_write(base, mode0, side); + + local_irq_save(flags); + for (i = 0; i < 36; i++) { + ret = swim_read_sector_header(base, &header); + if (!ret && (header.sector == sector)) { + /* found */ + + ret = swim_read_sector_data(base, buffer); + break; + } + } + local_irq_restore(flags); + + swim_write(base, mode0, MOTON); + + if ((header.side != side) || (header.track != track) || + (header.sector != sector)) + return 0; + + return ret; +} + +static int floppy_read_sectors(struct floppy_state *fs, + int req_sector, int sectors_nb, + unsigned char *buffer) +{ + struct swim __iomem *base = fs->swd->base; + int ret; + int side, track, sector; + int i, try; + + + swim_drive(base, fs->location); + for (i = req_sector; i < req_sector + sectors_nb; i++) { + int x; + track = i / fs->secpercyl; + x = i % fs->secpercyl; + side = x / fs->secpertrack; + sector = x % fs->secpertrack + 1; + + try = 5; + do { + ret = swim_read_sector(fs, side, track, sector, + buffer); + if (try-- == 0) + return -1; + } while (ret != 512); + + buffer += ret; + } + + return 0; +} + +static void redo_fd_request(struct request_queue *q) +{ + struct request *req; + struct floppy_state *fs; + + while ((req = elv_next_request(q))) { + + fs = req->rq_disk->private_data; + if (req->sector < 0 || req->sector >= fs->total_secs) { + end_request(req, 0); + continue; + } + if (req->current_nr_sectors == 0) { + end_request(req, 1); + continue; + } + if (!fs->disk_in) { + end_request(req, 0); + continue; + } + if (rq_data_dir(req) == WRITE) { + if (fs->write_protected) { + end_request(req, 0); + continue; + } + } + switch (rq_data_dir(req)) { + case WRITE: + /* NOT IMPLEMENTED */ + end_request(req, 0); + break; + case READ: + if (floppy_read_sectors(fs, req->sector, + req->current_nr_sectors, + req->buffer)) { + end_request(req, 0); + continue; + } + req->nr_sectors -= req->current_nr_sectors; + req->sector += req->current_nr_sectors; + req->buffer += req->current_nr_sectors * 512; + end_request(req, 1); + break; + } + } +} + +static void do_fd_request(struct request_queue *q) +{ + redo_fd_request(q); +} + +static struct floppy_struct floppy_type[4] = { + { 0, 0, 0, 0, 0, 0x00, 0x00, 0x00, 0x00, NULL }, /* no testing */ + { 720, 9, 1, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 360KB SS 3.5"*/ + { 1440, 9, 2, 80, 0, 0x2A, 0x02, 0xDF, 0x50, NULL }, /* 720KB 3.5" */ + { 2880, 18, 2, 80, 0, 0x1B, 0x00, 0xCF, 0x6C, NULL }, /* 1.44MB 3.5" */ +}; + +static int get_floppy_geometry(struct floppy_state *fs, int type, + struct floppy_struct **g) +{ + if (type >= ARRAY_SIZE(floppy_type)) + return -EINVAL; + + if (type) + *g = &floppy_type[type]; + else if (fs->type == HD_MEDIA) /* High-Density media */ + *g = &floppy_type[3]; + else if (fs->head_number == 2) /* double-sided */ + *g = &floppy_type[2]; + else + *g = &floppy_type[1]; + + return 0; +} + +static void setup_medium(struct floppy_state *fs) +{ + struct swim __iomem *base = fs->swd->base; + + if (swim_readbit(base, DISK_IN)) { + struct floppy_struct *g; + fs->disk_in = 1; + fs->write_protected = swim_readbit(base, WRITE_PROT); + fs->type = swim_readbit(base, ONEMEG_MEDIA); + + if (swim_track00(base)) + printk(KERN_ERR + "SWIM: cannot move floppy head to track 0\n"); + + swim_track00(base); + + get_floppy_geometry(fs, 0, &g); + fs->total_secs = g->size; + fs->secpercyl = g->head * g->sect; + fs->secpertrack = g->sect; + fs->track = 0; + } else { + fs->disk_in = 0; + } +} + +static int floppy_open(struct block_device *bdev, fmode_t mode) +{ + struct floppy_state *fs = bdev->bd_disk->private_data; + struct swim __iomem *base = fs->swd->base; + int err; + + if (fs->ref_count == -1 || (fs->ref_count && mode & FMODE_EXCL)) + return -EBUSY; + + if (mode & FMODE_EXCL) + fs->ref_count = -1; + else + fs->ref_count++; + + swim_write(base, setup, S_IBM_DRIVE | S_FCLK_DIV2); + udelay(10); + swim_drive(base, INTERNAL_DRIVE); + swim_motor(base, ON); + swim_action(base, SETMFM); + if (fs->ejected) + setup_medium(fs); + if (!fs->disk_in) { + err = -ENXIO; + goto out; + } + + if (mode & FMODE_NDELAY) + return 0; + + if (mode & (FMODE_READ|FMODE_WRITE)) { + check_disk_change(bdev); + if ((mode & FMODE_WRITE) && fs->write_protected) { + err = -EROFS; + goto out; + } + } + return 0; +out: + if (fs->ref_count < 0) + fs->ref_count = 0; + else if (fs->ref_count > 0) + --fs->ref_count; + + if (fs->ref_count == 0) + swim_motor(base, OFF); + return err; +} + +static int floppy_release(struct gendisk *disk, fmode_t mode) +{ + struct floppy_state *fs = disk->private_data; + struct swim __iomem *base = fs->swd->base; + + if (fs->ref_count < 0) + fs->ref_count = 0; + else if (fs->ref_count > 0) + --fs->ref_count; + + if (fs->ref_count == 0) + swim_motor(base, OFF); + + return 0; +} + +static int floppy_ioctl(struct block_device *bdev, fmode_t mode, + unsigned int cmd, unsigned long param) +{ + struct floppy_state *fs = bdev->bd_disk->private_data; + int err; + + if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)) + return -EPERM; + + switch (cmd) { + case FDEJECT: + if (fs->ref_count != 1) + return -EBUSY; + err = floppy_eject(fs); + return err; + + case FDGETPRM: + if (copy_to_user((void __user *) param, (void *) &floppy_type, + sizeof(struct floppy_struct))) + return -EFAULT; + break; + + default: + printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n", + cmd); + return -ENOSYS; + } + return 0; +} + +static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) +{ + struct floppy_state *fs = bdev->bd_disk->private_data; + struct floppy_struct *g; + int ret; + + ret = get_floppy_geometry(fs, 0, &g); + if (ret) + return ret; + + geo->heads = g->head; + geo->sectors = g->sect; + geo->cylinders = g->track; + + return 0; +} + +static int floppy_check_change(struct gendisk *disk) +{ + struct floppy_state *fs = disk->private_data; + + return fs->ejected; +} + +static int floppy_revalidate(struct gendisk *disk) +{ + struct floppy_state *fs = disk->private_data; + struct swim __iomem *base = fs->swd->base; + + swim_drive(base, fs->location); + + if (fs->ejected) + setup_medium(fs); + + if (!fs->disk_in) + swim_motor(base, OFF); + else + fs->ejected = 0; + + return !fs->disk_in; +} + +static struct block_device_operations floppy_fops = { + .owner = THIS_MODULE, + .open = floppy_open, + .release = floppy_release, + .locked_ioctl = floppy_ioctl, + .getgeo = floppy_getgeo, + .media_changed = floppy_check_change, + .revalidate_disk = floppy_revalidate, +}; + +static struct kobject *floppy_find(dev_t dev, int *part, void *data) +{ + struct swim_priv *swd = data; + int drive = (*part & 3); + + if (drive > swd->floppy_count) + return NULL; + + *part = 0; + return get_disk(swd->unit[drive].disk); +} + +static int __devinit swim_add_floppy(struct swim_priv *swd, + enum drive_location location) +{ + struct floppy_state *fs = &swd->unit[swd->floppy_count]; + struct swim __iomem *base = swd->base; + + fs->location = location; + + swim_drive(base, location); + + swim_motor(base, OFF); + + if (swim_readbit(base, SINGLE_SIDED)) + fs->head_number = 1; + else + fs->head_number = 2; + fs->ref_count = 0; + fs->ejected = 1; + + swd->floppy_count++; + + return 0; +} + +static int __devinit swim_floppy_init(struct swim_priv *swd) +{ + int err; + int drive; + struct swim __iomem *base = swd->base; + + /* scan floppy drives */ + + swim_drive(base, INTERNAL_DRIVE); + if (swim_readbit(base, DRIVE_PRESENT)) + swim_add_floppy(swd, INTERNAL_DRIVE); + swim_drive(base, EXTERNAL_DRIVE); + if (swim_readbit(base, DRIVE_PRESENT)) + swim_add_floppy(swd, EXTERNAL_DRIVE); + + /* register floppy drives */ + + err = register_blkdev(FLOPPY_MAJOR, "fd"); + if (err) { + printk(KERN_ERR "Unable to get major %d for SWIM floppy\n", + FLOPPY_MAJOR); + return -EBUSY; + } + + for (drive = 0; drive < swd->floppy_count; drive++) { + swd->unit[drive].disk = alloc_disk(1); + if (swd->unit[drive].disk == NULL) { + err = -ENOMEM; + goto exit_put_disks; + } + swd->unit[drive].swd = swd; + } + + swd->queue = blk_init_queue(do_fd_request, &swd->lock); + if (!swd->queue) { + err = -ENOMEM; + goto exit_put_disks; + } + + for (drive = 0; drive < swd->floppy_count; drive++) { + swd->unit[drive].disk->flags = GENHD_FL_REMOVABLE; + swd->unit[drive].disk->major = FLOPPY_MAJOR; + swd->unit[drive].disk->first_minor = drive; + sprintf(swd->unit[drive].disk->disk_name, "fd%d", drive); + swd->unit[drive].disk->fops = &floppy_fops; + swd->unit[drive].disk->private_data = &swd->unit[drive]; + swd->unit[drive].disk->queue = swd->queue; + set_capacity(swd->unit[drive].disk, 2880); + add_disk(swd->unit[drive].disk); + } + + blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, + floppy_find, NULL, swd); + + return 0; + +exit_put_disks: + unregister_blkdev(FLOPPY_MAJOR, "fd"); + while (drive--) + put_disk(swd->unit[drive].disk); + return err; +} + +static int __devinit swim_probe(struct platform_device *dev) +{ + struct resource *res; + struct swim __iomem *swim_base; + struct swim_priv *swd; + int ret; + + res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs"); + if (!res) { + ret = -ENODEV; + goto out; + } + + if (!request_mem_region(res->start, resource_size(res), CARDNAME)) { + ret = -EBUSY; + goto out; + } + + swim_base = ioremap(res->start, resource_size(res)); + if (!swim_base) { + return -ENOMEM; + goto out_release_io; + } + + /* probe device */ + + set_swim_mode(swim_base, 1); + if (!get_swim_mode(swim_base)) { + printk(KERN_INFO "SWIM device not found !\n"); + ret = -ENODEV; + goto out_iounmap; + } + + /* set platform driver data */ + + swd = kzalloc(sizeof(struct swim_priv), GFP_KERNEL); + if (!swd) { + ret = -ENOMEM; + goto out_iounmap; + } + platform_set_drvdata(dev, swd); + + swd->base = swim_base; + + ret = swim_floppy_init(swd); + if (ret) + goto out_kfree; + + return 0; + +out_kfree: + platform_set_drvdata(dev, NULL); + kfree(swd); +out_iounmap: + iounmap(swim_base); +out_release_io: + release_mem_region(res->start, resource_size(res)); +out: + return ret; +} + +static int __devexit swim_remove(struct platform_device *dev) +{ + struct swim_priv *swd = platform_get_drvdata(dev); + int drive; + struct resource *res; + + blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); + + for (drive = 0; drive < swd->floppy_count; drive++) { + del_gendisk(swd->unit[drive].disk); + put_disk(swd->unit[drive].disk); + } + + unregister_blkdev(FLOPPY_MAJOR, "fd"); + + blk_cleanup_queue(swd->queue); + + /* eject floppies */ + + for (drive = 0; drive < swd->floppy_count; drive++) + floppy_eject(&swd->unit[drive]); + + iounmap(swd->base); + + res = platform_get_resource_byname(dev, IORESOURCE_MEM, "swim-regs"); + if (res) + release_mem_region(res->start, resource_size(res)); + + platform_set_drvdata(dev, NULL); + kfree(swd); + + return 0; +} + +static struct platform_driver swim_driver = { + .probe = swim_probe, + .remove = __devexit_p(swim_remove), + .driver = { + .name = CARDNAME, + .owner = THIS_MODULE, + }, +}; + +static int __init swim_init(void) +{ + printk(KERN_INFO "SWIM floppy driver %s\n", DRIVER_VERSION); + + return platform_driver_register(&swim_driver); +} +module_init(swim_init); + +static void __exit swim_exit(void) +{ + platform_driver_unregister(&swim_driver); +} +module_exit(swim_exit); + +MODULE_DESCRIPTION("Driver for SWIM floppy controller"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Laurent Vivier "); +MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); diff --git a/drivers/block/swim_asm.S b/drivers/block/swim_asm.S new file mode 100644 index 0000000..c966820 --- /dev/null +++ b/drivers/block/swim_asm.S @@ -0,0 +1,247 @@ +/* + * low-level functions for the SWIM floppy controller + * + * needs assembly language because is very timing dependent + * this controller exists only on macintosh 680x0 based + * + * Copyright (C) 2004,2008 Laurent Vivier + * + * based on Alastair Bridgewater SWIM analysis, 2001 + * based on netBSD IWM driver (c) 1997, 1998 Hauke Fath. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * 2004-08-21 (lv) - Initial implementation + * 2008-11-05 (lv) - add get_swim_mode + */ + + .equ write_data, 0x0000 + .equ write_mark, 0x0200 + .equ write_CRC, 0x0400 + .equ write_parameter,0x0600 + .equ write_phase, 0x0800 + .equ write_setup, 0x0a00 + .equ write_mode0, 0x0c00 + .equ write_mode1, 0x0e00 + .equ read_data, 0x1000 + .equ read_mark, 0x1200 + .equ read_error, 0x1400 + .equ read_parameter, 0x1600 + .equ read_phase, 0x1800 + .equ read_setup, 0x1a00 + .equ read_status, 0x1c00 + .equ read_handshake, 0x1e00 + + .equ o_side, 0 + .equ o_track, 1 + .equ o_sector, 2 + .equ o_size, 3 + .equ o_crc0, 4 + .equ o_crc1, 5 + + .equ seek_time, 30000 + .equ max_retry, 40 + .equ sector_size, 512 + + .global swim_read_sector_header +swim_read_sector_header: + link %a6, #0 + moveml %d1-%d5/%a0-%a4,%sp@- + movel %a6@(0x0c), %a4 + bsr mfm_read_addrmark + moveml %sp@+, %d1-%d5/%a0-%a4 + unlk %a6 + rts + +sector_address_mark: + .byte 0xa1, 0xa1, 0xa1, 0xfe +sector_data_mark: + .byte 0xa1, 0xa1, 0xa1, 0xfb + +mfm_read_addrmark: + movel %a6@(0x08), %a3 + lea %a3@(read_handshake), %a2 + lea %a3@(read_mark), %a3 + moveq #-1, %d0 + movew #seek_time, %d2 + +wait_header_init: + tstb %a3@(read_error - read_mark) + moveb #0x18, %a3@(write_mode0 - read_mark) + moveb #0x01, %a3@(write_mode1 - read_mark) + moveb #0x01, %a3@(write_mode0 - read_mark) + tstb %a3@(read_error - read_mark) + moveb #0x08, %a3@(write_mode1 - read_mark) + + lea sector_address_mark, %a0 + moveq #3, %d1 + +wait_addr_mark_byte: + + tstb %a2@ + dbmi %d2, wait_addr_mark_byte + bpl header_exit + + moveb %a3@, %d3 + cmpb %a0@+, %d3 + dbne %d1, wait_addr_mark_byte + bne wait_header_init + + moveq #max_retry, %d2 + +amark0: tstb %a2@ + dbmi %d2, amark0 + bpl signal_nonyb + + moveb %a3@, %a4@(o_track) + + moveq #max_retry, %d2 + +amark1: tstb %a2@ + dbmi %d2, amark1 + bpl signal_nonyb + + moveb %a3@, %a4@(o_side) + + moveq #max_retry, %d2 + +amark2: tstb %a2@ + dbmi %d2, amark2 + bpl signal_nonyb + + moveb %a3@, %a4@(o_sector) + + moveq #max_retry, %d2 + +amark3: tstb %a2@ + dbmi %d2, amark3 + bpl signal_nonyb + + moveb %a3@, %a4@(o_size) + + moveq #max_retry, %d2 + +crc0: tstb %a2@ + dbmi %d2, crc0 + bpl signal_nonyb + + moveb %a3@, %a4@(o_crc0) + + moveq #max_retry, %d2 + +crc1: tstb %a2@ + dbmi %d2, crc1 + bpl signal_nonyb + + moveb %a3@, %a4@(o_crc1) + + tstb %a3@(read_error - read_mark) + +header_exit: + moveq #0, %d0 + moveb #0x18, %a3@(write_mode0 - read_mark) + rts +signal_nonyb: + moveq #-1, %d0 + moveb #0x18, %a3@(write_mode0 - read_mark) + rts + + .global swim_read_sector_data +swim_read_sector_data: + link %a6, #0 + moveml %d1-%d5/%a0-%a5,%sp@- + movel %a6@(0x0c), %a4 + bsr mfm_read_data + moveml %sp@+, %d1-%d5/%a0-%a5 + unlk %a6 + rts + +mfm_read_data: + movel %a6@(0x08), %a3 + lea %a3@(read_handshake), %a2 + lea %a3@(read_data), %a5 + lea %a3@(read_mark), %a3 + movew #seek_time, %d2 + +wait_data_init: + tstb %a3@(read_error - read_mark) + moveb #0x18, %a3@(write_mode0 - read_mark) + moveb #0x01, %a3@(write_mode1 - read_mark) + moveb #0x01, %a3@(write_mode0 - read_mark) + tstb %a3@(read_error - read_mark) + moveb #0x08, %a3@(write_mode1 - read_mark) + + lea sector_data_mark, %a0 + moveq #3, %d1 + + /* wait data address mark */ + +wait_data_mark_byte: + + tstb %a2@ + dbmi %d2, wait_data_mark_byte + bpl data_exit + + moveb %a3@, %d3 + cmpb %a0@+, %d3 + dbne %d1, wait_data_mark_byte + bne wait_data_init + + /* read data */ + + tstb %a3@(read_error - read_mark) + + movel #sector_size-1, %d4 /* sector size */ +read_new_data: + movew #max_retry, %d2 +read_data_loop: + moveb %a2@, %d5 + andb #0xc0, %d5 + dbne %d2, read_data_loop + beq data_exit + moveb %a5@, %a4@+ + andb #0x40, %d5 + dbne %d4, read_new_data + beq exit_loop + moveb %a5@, %a4@+ + dbra %d4, read_new_data +exit_loop: + + /* read CRC */ + + movew #max_retry, %d2 +data_crc0: + + tstb %a2@ + dbmi %d2, data_crc0 + bpl data_exit + + moveb %a3@, %d5 + + moveq #max_retry, %d2 + +data_crc1: + + tstb %a2@ + dbmi %d2, data_crc1 + bpl data_exit + + moveb %a3@, %d5 + + tstb %a3@(read_error - read_mark) + + moveb #0x18, %a3@(write_mode0 - read_mark) + + /* return number of bytes read */ + + movel #sector_size, %d0 + addw #1, %d4 + subl %d4, %d0 + rts +data_exit: + moveb #0x18, %a3@(write_mode0 - read_mark) + moveq #-1, %d0 + rts -- cgit v1.1