[RFC PATCH] ide-floppy: remove struct idefloppy_capabilities_page

[RFC PATCH] ide-floppy: remove struct idefloppy_capabilities_page

[Borislav Petkov]

Hi Bart,

before removing all those typedefs in ide-floppy i wanted to check with you whether what
i have in mind is in the right direction before doing all the work for nothing.
Here's the first patch removing struct idefloppy_capabilities_page. Please, tell
me whether it is similar to what you guys have in mind or is it missing the
point.

Thanks.


From 41c791f40e3fcf2287aa245f25796fa58bb17afc Mon Sep 17 00:00:00 2001
From: Borislav Petkov <bbpetkov@yahoo.de>
Date: Sun, 6 Jan 2008 10:37:47 +0100
Subject: [PATCH] ide-floppy: remove struct idefloppy_capabilities_page

This change is rather temporary and is in preparation of using generic commands
as is the case with ide-cd and the uniform cdrom layer (i.e. init_cdrom_command())
However, before this happens, we'll have to remove all typedefs and teach
idefloppy_create_mode_sense_cmd() to work directly on u8 buffers.

Also, since idefloppy_get_capability_page() was used to read only the sfrp bit,
rename the latter so that the name reflects what it does.

Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
---
 drivers/ide/ide-floppy.c |   55 +++++-----------------------------------------
 1 files changed, 6 insertions(+), 49 deletions(-)

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index e8fe8ef..2b9885f 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -120,44 +120,6 @@ typedef struct idefloppy_packet_command_s {
 #define	PC_SUPPRESS_ERROR		6	/* Suppress error reporting */
 
 /*
- *	Removable Block Access Capabilities Page
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	page_code	:6;	/* Page code - Should be 0x1b */
-	unsigned	reserved1_6	:1;	/* Reserved */
-	unsigned	ps		:1;	/* Should be 0 */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	ps		:1;	/* Should be 0 */
-	unsigned	reserved1_6	:1;	/* Reserved */
-	unsigned	page_code	:6;	/* Page code - Should be 0x1b */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		page_length;		/* Page Length - Should be 0xa */
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	reserved2	:6;
-	unsigned	srfp		:1;	/* Supports reporting progress of format */
-	unsigned	sflp		:1;	/* System floppy type device */
-	unsigned	tlun		:3;	/* Total logical units supported by the device */
-	unsigned	reserved3	:3;
-	unsigned	sml		:1;	/* Single / Multiple lun supported */
-	unsigned	ncd		:1;	/* Non cd optical device */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	sflp		:1;	/* System floppy type device */
-	unsigned	srfp		:1;	/* Supports reporting progress of format */
-	unsigned	reserved2	:6;
-	unsigned	ncd		:1;	/* Non cd optical device */
-	unsigned	sml		:1;	/* Single / Multiple lun supported */
-	unsigned	reserved3	:3;
-	unsigned	tlun		:3;	/* Total logical units supported by the device */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		reserved[8];
-} idefloppy_capabilities_page_t;
-
-/*
  *	Flexible disk page.
  */
 typedef struct {
@@ -397,7 +359,8 @@ typedef struct {
 } idefloppy_request_sense_result_t;
 
 /*
- *	Pages of the SELECT SENSE / MODE SENSE packet commands.
+ * Pages of the SELECT SENSE / MODE SENSE packet commands.
+ * See SFF-8070i spec.
  */
 #define	IDEFLOPPY_CAPABILITIES_PAGE	0x1b
 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE	0x05
@@ -1273,25 +1236,20 @@ static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
 	return 0;
 }
 
-static int idefloppy_get_capability_page(ide_drive_t *drive)
+static int idefloppy_get_sfrp_bit(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);
 
 	set_bit(PC_SUPPRESS_ERROR, &pc.flags);
-	if (idefloppy_queue_pc_tail(drive,&pc)) {
+	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;
+	floppy->srfp = pc.buffer[8 + 2] & 0x40;
 	return (0);
 }
 
@@ -1497,8 +1455,7 @@ static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
 		return (-EFAULT);
 	}
 
-	/* Get the SFRP bit */
-	(void) idefloppy_get_capability_page(drive);
+	(void) idefloppy_get_sfrp_bit(drive);
 	idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
 	if (idefloppy_queue_pc_tail(drive, &pc)) {
                 return (-EIO);
-- 
1.5.3.7

-- 
Regards/Gruß,
    Boris.

Re: [RFC PATCH] ide-floppy: remove struct idefloppy_capabilities_page

[Bartlomiej Zolnierkiewicz]

On Sunday 06 January 2008, Borislav Petkov wrote:
> Hi Bart,
> 
> before removing all those typedefs in ide-floppy i wanted to check with you whether what
> i have in mind is in the right direction before doing all the work for nothing.
> Here's the first patch removing struct idefloppy_capabilities_page. Please, tell
> me whether it is similar to what you guys have in mind or is it missing the
> point.
> 
> Thanks.

You are 100% on the right track. :)

> From 41c791f40e3fcf2287aa245f25796fa58bb17afc Mon Sep 17 00:00:00 2001
> From: Borislav Petkov <bbpetkov@yahoo.de>
> Date: Sun, 6 Jan 2008 10:37:47 +0100
> Subject: [PATCH] ide-floppy: remove struct idefloppy_capabilities_page
> 
> This change is rather temporary and is in preparation of using generic commands
> as is the case with ide-cd and the uniform cdrom layer (i.e. init_cdrom_command())
> However, before this happens, we'll have to remove all typedefs and teach
> idefloppy_create_mode_sense_cmd() to work directly on u8 buffers.
> 
> Also, since idefloppy_get_capability_page() was used to read only the sfrp bit,
> rename the latter so that the name reflects what it does.
> 
> Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>

applied