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ide-floppy: remove struct idefloppy_capacity_descriptor 

Also,
- remove the accompanying 4 byte idefloppy_capacity_header.
- rename functions from idefloppy_... to ide_floppy_... after cleanup.
- simplify loop in ide_floppy_get_capacity() by reversing if-test condition
  logically.
- finally, fix white space and checkpatch.pl issues

Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2008-02-02 19:56:35 +01:00 committed by Bartlomiej Zolnierkiewicz
parent 8e81bbba72
commit 194ec0c078
1 changed files with 76 additions and 100 deletions
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176
drivers/ide/ide-floppy.c
View File

@ -119,29 +119,7 @@ typedef struct idefloppy_packet_command_s {
#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
/*
* Format capacity
*/
typedef struct {
u8 reserved[3];
u8 length; /* Length of the following descriptors in bytes */
} idefloppy_capacity_header_t;
typedef struct {
u32 blocks; /* Number of blocks */
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned dc :2; /* Descriptor Code */
unsigned reserved :6;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved :6;
unsigned dc :2; /* Descriptor Code */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u8 length_msb; /* Block Length (MSB)*/
u16 length; /* Block Length */
} idefloppy_capacity_descriptor_t;
/* format capacities descriptor codes */
#define CAPACITY_INVALID 0x00
#define CAPACITY_UNFORMATTED 0x01
#define CAPACITY_CURRENT 0x02
@ -184,8 +162,8 @@ typedef struct ide_floppy_obj {
*/
/* Current format */
int blocks, block_size, bs_factor;
/* Last format capacity */
idefloppy_capacity_descriptor_t capacity;
/* Last format capacity descriptor */
u8 cap_desc[8];
/* Copy of the flexible disk page */
u8 flexible_disk_page[32];
/* Write protect */
@ -1141,17 +1119,17 @@ static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
}
/*
* Determine if a media is present in the floppy drive, and if so,
* its LBA capacity.
* Determine if a media is present in the floppy drive, and if so, its LBA
* capacity.
*/
static int idefloppy_get_capacity (ide_drive_t *drive)
static int ide_floppy_get_capacity(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
idefloppy_pc_t pc;
idefloppy_capacity_header_t *header;
idefloppy_capacity_descriptor_t *descriptor;
int i, descriptors, rc = 1, blocks, length;
u8 *cap_desc;
u8 header_len, desc_cnt;
int i, rc = 1, blocks, length;
drive->bios_cyl = 0;
drive->bios_head = drive->bios_sect = 0;
floppy->blocks = 0;
@ -1163,17 +1141,26 @@ static int idefloppy_get_capacity (ide_drive_t *drive)
printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
return 1;
}
header = (idefloppy_capacity_header_t *) pc.buffer;
descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
header_len = pc.buffer[3];
cap_desc = &pc.buffer[4];
desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
for (i = 0; i < descriptors; i++, descriptor++) {
blocks = descriptor->blocks = be32_to_cpu(descriptor->blocks);
length = descriptor->length = be16_to_cpu(descriptor->length);
for (i = 0; i < desc_cnt; i++) {
unsigned int desc_start = 4 + i*8;
if (!i)
{
switch (descriptor->dc) {
blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
i, blocks * length / 1024, blocks, length);
if (i)
continue;
/*
* the code below is valid only for the 1st descriptor, ie i=0
*/
switch (pc.buffer[desc_start + 4] & 0x03) {
/* Clik! drive returns this instead of CAPACITY_CURRENT */
case CAPACITY_UNFORMATTED:
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
@ -1184,23 +1171,25 @@ static int idefloppy_get_capacity (ide_drive_t *drive)
break;
case CAPACITY_CURRENT:
/* Normal Zip/LS-120 disks */
if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
if (memcmp(cap_desc, &floppy->cap_desc, 8))
printk(KERN_INFO "%s: %dkB, %d blocks, %d "
"sector size\n", drive->name,
blocks * length / 1024, blocks, length);
floppy->capacity = *descriptor;
memcpy(&floppy->cap_desc, cap_desc, 8);
if (!length || length % 512) {
printk(KERN_NOTICE "%s: %d bytes block size "
"not supported\n", drive->name, length);
} else {
floppy->blocks = blocks;
floppy->block_size = length;
if ((floppy->bs_factor = length / 512) != 1)
printk(KERN_NOTICE "%s: warning: non "
floppy->blocks = blocks;
floppy->block_size = length;
floppy->bs_factor = length / 512;
if (floppy->bs_factor != 1)
printk(KERN_NOTICE "%s: warning: non "
"512 bytes block size not "
"fully supported\n",
drive->name);
rc = 0;
rc = 0;
}
break;
case CAPACITY_NO_CARTRIDGE:
@ -1215,52 +1204,42 @@ static int idefloppy_get_capacity (ide_drive_t *drive)
"in drive\n", drive->name);
break;
}
}
if (!i) {
debug_log("Descriptor 0 Code: %d\n", descriptor->dc);
}
debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
i, blocks * length / 1024, blocks, length);
debug_log("Descriptor 0 Code: %d\n",
pc.buffer[desc_start + 4] & 0x03);
}
/* Clik! disk does not support get_flexible_disk_page */
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
(void) ide_floppy_get_flexible_disk_page(drive);
}
set_capacity(floppy->disk, 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.
**
*/
* Obtain the list of formattable capacities.
* Very similar to ide_floppy_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, int __user *arg)
static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
{
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;
idefloppy_pc_t pc;
u8 header_len, desc_cnt;
int i, blocks, length, u_array_size, u_index;
int __user *argp;
if (get_user(u_array_size, arg))
@ -1272,30 +1251,27 @@ static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
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);
return (-EIO);
}
header_len = pc.buffer[3];
desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
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.
*/
* We always skip the first capacity descriptor. That's the current
* capacity. We are interested in the remaining descriptors, the
* formattable capacities.
*/
for (i = 1; i < desc_cnt; i++) {
unsigned int desc_start = 4 + i*8;
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 = be32_to_cpu(descriptor->blocks);
length = be16_to_cpu(descriptor->length);
blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
if (put_user(blocks, argp))
return(-EFAULT);
@ -1535,7 +1511,7 @@ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
}
(void) idefloppy_get_capacity(drive);
(void) ide_floppy_get_capacity(drive);
idefloppy_add_settings(drive);
}
@ -1630,7 +1606,7 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
(void) idefloppy_queue_pc_tail(drive, &pc);
}
if (idefloppy_get_capacity (drive)
if (ide_floppy_get_capacity(drive)
&& (filp->f_flags & O_NDELAY) == 0
/*
** Allow O_NDELAY to open a drive without a disk, or with
@ -1734,7 +1710,7 @@ static int idefloppy_ioctl(struct inode *inode, struct file *file,
case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
return 0;
case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
return idefloppy_get_format_capacities(drive, argp);
return ide_floppy_get_format_capacities(drive, argp);
case IDEFLOPPY_IOCTL_FORMAT_START:
if (!(file->f_mode & 2))