Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b65f0755fd08c92f377fb434076865284283e2c1
Commit: b65f0755fd08c92f377fb434076865284283e2c1
Parent: a2d6ea0180531b5ace2dc1e64b6e22465ed51267
Author: Mark Fortescue <[EMAIL PROTECTED]>
AuthorDate: Wed Jul 25 23:45:10 2007 -0700
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jul 30 00:27:30 2007 -0700
[SPARC]: Fix floppy on some sun4c systems.
Add in code to support an 82077 FDC on sun4c systems. There is a
problem with spurious interrupts but it does apear to work.
Testing on my SS2 (82072A FDC) shows that the floppy driver is not
100% with sun4c any way (any spurious interrupt kills it, requiring a
reboot to recover).
Signed-off-by: Mark Fortescue <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
include/asm-sparc/floppy.h | 80 +++++++++++++++++++++++++++----------------
1 files changed, 50 insertions(+), 30 deletions(-)
diff --git a/include/asm-sparc/floppy.h b/include/asm-sparc/floppy.h
index 9073c84..28ce2b9 100644
--- a/include/asm-sparc/floppy.h
+++ b/include/asm-sparc/floppy.h
@@ -101,6 +101,29 @@ static struct sun_floppy_ops sun_fdops;
#define CROSS_64KB(a,s) (0)
/* Routines unique to each controller type on a Sun. */
+static void sun_set_dor(unsigned char value, int fdc_82077)
+{
+ if (sparc_cpu_model == sun4c) {
+ unsigned int bits = 0;
+ if (value & 0x10)
+ bits |= AUXIO_FLPY_DSEL;
+ if ((value & 0x80) == 0)
+ bits |= AUXIO_FLPY_EJCT;
+ set_auxio(bits, (~bits) & (AUXIO_FLPY_DSEL|AUXIO_FLPY_EJCT));
+ }
+ if (fdc_82077) {
+ sun_fdc->dor_82077 = value;
+ }
+}
+
+static unsigned char sun_read_dir(void)
+{
+ if (sparc_cpu_model == sun4c)
+ return (get_auxio() & AUXIO_FLPY_DCHG) ? 0x80 : 0;
+ else
+ return sun_fdc->dir_82077;
+}
+
static unsigned char sun_82072_fd_inb(int port)
{
udelay(5);
@@ -113,7 +136,7 @@ static unsigned char sun_82072_fd_inb(int port)
case 5: /* FD_DATA */
return sun_fdc->data_82072;
case 7: /* FD_DIR */
- return (get_auxio() & AUXIO_FLPY_DCHG)? 0x80: 0;
+ return sun_read_dir();
};
panic("sun_82072_fd_inb: How did I get here?");
}
@@ -126,20 +149,7 @@ static void sun_82072_fd_outb(unsigned char value, int
port)
printk("floppy: Asked to write to unknown port %d\n", port);
panic("floppy: Port bolixed.");
case 2: /* FD_DOR */
- /* Oh geese, 82072 on the Sun has no DOR register,
- * the functionality is implemented via the AUXIO
- * I/O register. So we must emulate the behavior.
- *
- * ASSUMPTIONS: There will only ever be one floppy
- * drive attached to a Sun controller
- * and it will be at drive zero.
- */
- {
- unsigned bits = 0;
- if (value & 0x10) bits |= AUXIO_FLPY_DSEL;
- if ((value & 0x80) == 0) bits |= AUXIO_FLPY_EJCT;
- set_auxio(bits, (~bits) &
(AUXIO_FLPY_DSEL|AUXIO_FLPY_EJCT));
- }
+ sun_set_dor(value, 0);
break;
case 5: /* FD_DATA */
sun_fdc->data_82072 = value;
@@ -161,15 +171,22 @@ static unsigned char sun_82077_fd_inb(int port)
default:
printk("floppy: Asked to read unknown port %d\n", port);
panic("floppy: Port bolixed.");
+ case 0: /* FD_STATUS_0 */
+ return sun_fdc->status1_82077;
+ case 1: /* FD_STATUS_1 */
+ return sun_fdc->status2_82077;
+ case 2: /* FD_DOR */
+ return sun_fdc->dor_82077;
+ case 3: /* FD_TDR */
+ return sun_fdc->tapectl_82077;
case 4: /* FD_STATUS */
return sun_fdc->status_82077 & ~STATUS_DMA;
case 5: /* FD_DATA */
return sun_fdc->data_82077;
case 7: /* FD_DIR */
- /* XXX: Is DCL on 0x80 in sun4m? */
- return sun_fdc->dir_82077;
+ return sun_read_dir();
};
- panic("sun_82072_fd_inb: How did I get here?");
+ panic("sun_82077_fd_inb: How did I get here?");
}
static void sun_82077_fd_outb(unsigned char value, int port)
@@ -180,8 +197,7 @@ static void sun_82077_fd_outb(unsigned char value, int port)
printk("floppy: Asked to write to unknown port %d\n", port);
panic("floppy: Port bolixed.");
case 2: /* FD_DOR */
- /* Happily, the 82077 has a real DOR register. */
- sun_fdc->dor_82077 = value;
+ sun_set_dor(value, 1);
break;
case 5: /* FD_DATA */
sun_fdc->data_82077 = value;
@@ -192,6 +208,9 @@ static void sun_82077_fd_outb(unsigned char value, int port)
case 4: /* FD_STATUS */
sun_fdc->status_82077 = value;
break;
+ case 3: /* FD_TDR */
+ sun_fdc->tapectl_82077 = value;
+ break;
};
return;
}
@@ -332,16 +351,17 @@ static int sun_floppy_init(void)
goto no_sun_fdc;
}
- if(sparc_cpu_model == sun4c) {
- sun_fdops.fd_inb = sun_82072_fd_inb;
- sun_fdops.fd_outb = sun_82072_fd_outb;
- fdc_status = &sun_fdc->status_82072;
- /* printk("AUXIO @0x%lx\n", auxio_register); */ /* P3 */
- } else {
- sun_fdops.fd_inb = sun_82077_fd_inb;
- sun_fdops.fd_outb = sun_82077_fd_outb;
- fdc_status = &sun_fdc->status_82077;
- /* printk("DOR @0x%p\n", &sun_fdc->dor_82077); */ /* P3 */
+ sun_fdops.fd_inb = sun_82077_fd_inb;
+ sun_fdops.fd_outb = sun_82077_fd_outb;
+ fdc_status = &sun_fdc->status_82077;
+
+ if (sun_fdc->dor_82077 == 0x80) {
+ sun_fdc->dor_82077 = 0x02;
+ if (sun_fdc->dor_82077 == 0x80) {
+ sun_fdops.fd_inb = sun_82072_fd_inb;
+ sun_fdops.fd_outb = sun_82072_fd_outb;
+ fdc_status = &sun_fdc->status_82072;
+ }
}
/* Success... */
-
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