Messages in this thread Patch in this message | | | Date | Sat, 6 Jan 2001 23:54:37 -0500 (EST) | From | Sam Varshavchik <> | Subject | PATCH: format floppies in ATAPI IDE floppy drives. |
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This patch adds the ability to format standard 3.5" floppies in ATAPI IDE floppy drives. It's actually against ide-floppy.c from a test 2.4 kernel, but I expect it to apply to the 2.4-final (I don't recall seeing any updates to ide-floppy.c, recently).
A short userland utility is required to use this patch. I've written a pretty raw userland utility for that. I'll clean it up and make it more presentable later. Download the userland code from http://www.email-scan.com/idefloppy/
The tarball includes some additional documentation and musings.
--- drivers/ide/ide-floppy.c.orig Fri Oct 27 02:35:48 2000 +++ drivers/ide/ide-floppy.c Sat Jan 6 23:01:35 2001 @@ -1,5 +1,5 @@ /* - * linux/drivers/ide/ide-floppy.c Version 0.9 Jul 4, 1999 + * linux/drivers/ide/ide-floppy.c Version 0.9.sv Jan 6 2001 * * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il> */ @@ -29,9 +29,18 @@ * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of * bytes requested on each interrupt to be zero. * Thanks to <shanos@es.co.nz> for pointing this out. + * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com> + * Implement low level formatting. Reimplemented + * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp + * bit. My LS-120 drive barfs on + * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me. + * Compromise by not reporting a failure to get this + * mode page. Implemented four IOCTLs in order to + * implement formatting. IOCTls begin with 0x4600, + * 0x46 is 'F' as in Format. */
-#define IDEFLOPPY_VERSION "0.9" +#define IDEFLOPPY_VERSION "0.9.sv"
#include <linux/config.h> #include <linux/module.h> @@ -228,6 +237,7 @@ * Last error information */ byte sense_key, asc, ascq; + int progress_indication;
/* * Device information @@ -236,7 +246,7 @@ idefloppy_capacity_descriptor_t capacity; /* Last format capacity */ idefloppy_flexible_disk_page_t flexible_disk_page; /* Copy of the flexible disk page */ int wp; /* Write protect */ - + int srfp; /* Supports format progress report */ unsigned int flags; /* Status/Action flags */ } idefloppy_floppy_t;
@@ -246,6 +256,7 @@ #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ +#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
/* * ATAPI floppy drive packet commands @@ -276,6 +287,15 @@ #define MODE_SENSE_SAVED 0x03
/* + * IOCTLs used in low-level formatting. + */ + +#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 +#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 +#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 +#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 + +/* * Special requests for our block device strategy routine. */ #define IDEFLOPPY_FIRST_RQ 90 @@ -559,7 +579,7 @@ u8 asc; /* Additional Sense Code */ u8 ascq; /* Additional Sense Code Qualifier */ u8 replaceable_unit_code; /* Field Replaceable Unit Code */ - u8 reserved[3]; + u8 sksv[3]; u8 pad[2]; /* Padding to 20 bytes */ } idefloppy_request_sense_result_t;
@@ -746,6 +766,8 @@ idefloppy_floppy_t *floppy = drive->driver_data;
floppy->sense_key = result->sense_key; floppy->asc = result->asc; floppy->ascq = result->ascq; + floppy->progress_indication= result->sksv[0] & 0x80 ? + (unsigned short)get_unaligned((u16 *)(result->sksv+1)):0x10000; #if IDEFLOPPY_DEBUG_LOG if (floppy->failed_pc) printk (KERN_INFO "ide-floppy: pc = %x, sense key = %x, asc = %x, ascq = %x\n",floppy->failed_pc->c[0],result->sense_key,result->asc,result->ascq); @@ -954,7 +976,7 @@ return ide_do_reset (drive); } ide_set_handler (drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* Set the interrupt routine */ - atapi_output_bytes (drive, floppy->pc->c, 12); /* Send the actual packet */ + atapi_output_bytes (drive, floppy->pc->c, 12); /* Send the actual packet */ return ide_started; }
@@ -1062,6 +1084,22 @@ pc->request_transfer = 255; }
+static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l) +{ + idefloppy_init_pc (pc); + pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; + pc->c[1] = 0x17; + + memset(pc->buffer, 0, 12); + pc->buffer[1] = 0xA2; /* Format list header, byte 1: FOV/DCRT/IMM */ + pc->buffer[3] = 8; + + put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); + put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); + pc->buffer_size=12; + set_bit(PC_WRITING, &pc->flags); +} + /* * A mode sense command is used to "sense" floppy parameters. */ @@ -1235,6 +1273,25 @@ return 0; }
+static int idefloppy_get_capability_page(ide_drive_t *drive) +{ + idefloppy_floppy_t *floppy = drive->driver_data; + idefloppy_pc_t pc; + idefloppy_mode_parameter_header_t *header; + idefloppy_capabilities_page_t *page; + + floppy->srfp=0; + idefloppy_create_mode_sense_cmd (&pc, IDEFLOPPY_CAPABILITIES_PAGE, + MODE_SENSE_CURRENT); + if (idefloppy_queue_pc_tail (drive,&pc)) { + return 1; + } + header = (idefloppy_mode_parameter_header_t *) pc.buffer; + page= (idefloppy_capabilities_page_t *)(header+1); + floppy->srfp=page->srfp; + return (0); +} + /* * Determine if a media is present in the floppy drive, and if so, * its LBA capacity. @@ -1286,11 +1343,172 @@ #endif /* IDEFLOPPY_DEBUG_INFO */ } (void) idefloppy_get_flexible_disk_page (drive); + (void) idefloppy_get_capability_page (drive); + drive->part[0].nr_sects = floppy->blocks * floppy->bs_factor; return rc; }
/* +** Obtain the list of formattable capacities. +** Very similar to idefloppy_get_capacity, except that we push the capacity +** descriptors to userland, instead of our own structures. +** +** Userland gives us the following structure: +** +** struct idefloppy_format_capacities { +** int nformats; +** struct { +** int nblocks; +** int blocksize; +** } formats[]; +** } ; +** +** userland initializes nformats to the number of allocated formats[] +** records. On exit we set nformats to the number of records we've +** actually initialized. +** +*/ + +static int idefloppy_get_format_capacities (ide_drive_t *drive, + struct inode *inode, + struct file *file, + int *arg) /* Cheater */ +{ + idefloppy_pc_t pc; + idefloppy_capacity_header_t *header; + idefloppy_capacity_descriptor_t *descriptor; + int i, descriptors, blocks, length; + int u_array_size; + int u_index; + int *argp; + + if (get_user(u_array_size, arg)) + return (-EFAULT); + + if (u_array_size <= 0) + return (-EINVAL); + + idefloppy_create_read_capacity_cmd (&pc); + if (idefloppy_queue_pc_tail (drive, &pc)) { + printk (KERN_ERR "ide-floppy: Can't get floppy parameters\n"); + return (-EIO); + } + header = (idefloppy_capacity_header_t *) pc.buffer; + descriptors = header->length / + sizeof (idefloppy_capacity_descriptor_t); + descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); + + u_index=0; + argp=arg+1; + + /* + ** We always skip the first capacity descriptor. That's the + ** current capacity. We are interested in the remaining descriptors, + ** the formattable capacities. + */ + + for (i=0; i<descriptors; i++, descriptor++) + { + if (u_index >= u_array_size) + break; /* User-supplied buffer too small */ + if (i == 0) + continue; /* Skip the first descriptor */ + + blocks = ntohl (descriptor->blocks); + length = ntohs (descriptor->length); + + if (put_user(blocks, argp)) + return (-EFAULT); + ++argp; + + if (put_user(length, argp)) + return (-EFAULT); + ++argp; + + ++u_index; + } + + if (put_user(u_index, arg)) + return (-EFAULT); + return (0); +} + +/* +** Send ATAPI_FORMAT_UNIT to the drive. +** +** Userland gives us the following structure: +** +** struct idefloppy_format_command { +** int nblocks; +** int blocksize; +** } ; +*/ + +static int idefloppy_begin_format(ide_drive_t *drive, + struct inode *inode, + struct file *file, + int *arg) +{ + int blocks; + int length; + idefloppy_pc_t pc; + + if (get_user(blocks, arg) + || get_user(length, arg+1)) + { + return (-EFAULT); + } + + idefloppy_create_format_unit_cmd(&pc, blocks, length); + if (idefloppy_queue_pc_tail (drive, &pc)) + { + return (-EIO); + } + return (0); +} + +/* +** Get ATAPI_FORMAT_UNIT progress indication. +** +** Userland gives a pointer to an int. The int is set to a progresss +** indicator 0-65536, with 65536=100%. +** +** If the drive does not support format progress indication, we just return +** a 65536, screw it. +*/ + +static int idefloppy_get_format_progress(ide_drive_t *drive, + struct inode *inode, + struct file *file, + int *arg) +{ + idefloppy_floppy_t *floppy = drive->driver_data; + idefloppy_pc_t pc; + int progress_indication=0x10000; + + if (floppy->srfp) + { + idefloppy_create_request_sense_cmd(&pc); + if (idefloppy_queue_pc_tail (drive, &pc)) + { + return (-EIO); + } + + if (floppy->sense_key == 2 && floppy->asc == 4 && + floppy->ascq == 4) + { + progress_indication=floppy->progress_indication; + } + } + + if (put_user(progress_indication, arg)) + return (-EFAULT); + + return (0); +} + +/* * Our special ide-floppy ioctl's. * * Currently there aren't any ioctl's. @@ -1300,7 +1518,8 @@ { idefloppy_pc_t pc;
- if (cmd == CDROMEJECT) { + switch (cmd) { + case CDROMEJECT: if (drive->usage > 1) return -EBUSY; idefloppy_create_prevent_cmd (&pc, 0); @@ -1308,6 +1527,51 @@ idefloppy_create_start_stop_cmd (&pc, 2); (void) idefloppy_queue_pc_tail (drive, &pc); return 0; + case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: + return (0); + case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: + return (idefloppy_get_format_capacities(drive, inode, file, + (int *)arg)); + case IDEFLOPPY_IOCTL_FORMAT_START: + + if (!(file->f_mode & 2)) + return (-EPERM); + + { + idefloppy_floppy_t *floppy = drive->driver_data; + + set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); + + if (drive->usage > 1) + { + /* Don't format if someone is using the disk */ + + clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, + &floppy->flags); + return -EBUSY; + } + else + { + int rc=idefloppy_begin_format(drive, inode, + file, + (int *)arg); + + if (rc) + clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, + &floppy->flags); + return (rc); + + /* + ** Note, the bit will be cleared when the device is + ** closed. This is the cleanest way to handle the + ** situation where the drive does not support + ** format progress reporting. + */ + } + } + case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: + return (idefloppy_get_format_progress(drive, inode, file, + (int *)arg)); } return -EIO; } @@ -1326,16 +1590,22 @@
MOD_INC_USE_COUNT; if (drive->usage == 1) { + + clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); + /* Just in case */ + idefloppy_create_test_unit_ready_cmd(&pc); if (idefloppy_queue_pc_tail(drive, &pc)) { idefloppy_create_start_stop_cmd (&pc, 1); (void) idefloppy_queue_pc_tail (drive, &pc); } + if (idefloppy_get_capacity (drive)) { drive->usage--; MOD_DEC_USE_COUNT; return -EIO; } + if (floppy->wp && (filp->f_mode & 2)) { drive->usage--; MOD_DEC_USE_COUNT; @@ -1346,6 +1616,12 @@ (void) idefloppy_queue_pc_tail (drive, &pc); check_disk_change(inode->i_rdev); } + else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) + { + drive->usage--; + MOD_DEC_USE_COUNT; + return -EBUSY; + } return 0; }
@@ -1358,9 +1634,13 @@ #endif /* IDEFLOPPY_DEBUG_LOG */
if (!drive->usage) { + idefloppy_floppy_t *floppy = drive->driver_data; + invalidate_buffers (inode->i_rdev); idefloppy_create_prevent_cmd (&pc, 0); (void) idefloppy_queue_pc_tail (drive, &pc); + + clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); } MOD_DEC_USE_COUNT; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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