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USB: MUSB: save hardware revision at init 

MUSB: save hardware revision at init

This can be used later to flag workarounds for issues affecting
particular revisions. Saving this at init avoids having to
read the HWVERS register multiple times in code.

While at it, use macros to extract the version information
instead of using hardcoded values.

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Cc: Ajay Kumar Gupta <ajay.gupta@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Anand Gadiyar 2009-11-16 21:09:21 +05:30 committed by Greg Kroah-Hartman
parent 32340d3f75
commit 32c3b94e2b
2 changed files with 12 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/usb/musb/musb_core.c
View File

@ -1319,7 +1319,6 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
#endif
u8 reg;
char *type;
u16 hwvers, rev_major, rev_minor;
char aInfo[78], aRevision[32], aDate[12];
void __iomem *mbase = musb->mregs;
int status = 0;
@ -1391,11 +1390,10 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
}
/* log release info */
hwvers = musb_read_hwvers(mbase);
rev_major = (hwvers >> 10) & 0x1f;
rev_minor = hwvers & 0x3ff;
snprintf(aRevision, 32, "%d.%d%s", rev_major,
rev_minor, (hwvers & 0x8000) ? "RC" : "");
musb->hwvers = musb_read_hwvers(mbase);
snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers),
MUSB_HWVERS_MINOR(musb->hwvers),
(musb->hwvers & MUSB_HWVERS_RC) ? "RC" : "");
printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n",
musb_driver_name, type, aRevision, aDate);

8
drivers/usb/musb/musb_core.h
View File

@ -322,6 +322,14 @@ struct musb {
struct clk *clock;
irqreturn_t (*isr)(int, void *);
struct work_struct irq_work;
#define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f)
#define MUSB_HWVERS_MINOR(x) (x & 0x3ff)
#define MUSB_HWVERS_RC 0x8000
#define MUSB_HWVERS_1300 0x52C
#define MUSB_HWVERS_1400 0x590
#define MUSB_HWVERS_1800 0x720
#define MUSB_HWVERS_2000 0x800
u16 hwvers;
/* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
#define MUSB_PORT_STAT_RESUME (1 << 31)