diff options
| author | Andrew Morton <akpm@osdl.org> | 2004-06-08 18:16:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-06-08 18:16:28 -0700 |
| commit | 85aeb8a6afef5cf68538c159bf43a6a0607441a3 (patch) | |
| tree | 9e364a652c94feaff5b8e8c7afec5bd6a1df37e7 /drivers/block | |
| parent | 03a6103245d32ba8ce662eab6bc7b371eccada5b (diff) | |
[PATCH] runtime selection of CONFIG_PARIDE_EPATC8
From: Christoph Hellwig <hch@lst.de>
drivers/block/paride/epat.c support two slightly different protocol
variants. Currently it's compile-time selected by CONFIG_PARIDE_EPATC8,
but this patch adds a epatc8 module option to allow runtime selection.
CONFIG_PARIDE_EPATC8 stays for now but I'd like to kill it int 2.7.
The basic patch is from the Debian kernel package (Author unknown) but I
reworked it a bit.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/paride/epat.c | 39 |
1 files changed, 23 insertions, 16 deletions
diff --git a/drivers/block/paride/epat.c b/drivers/block/paride/epat.c index 4f090dcc5998..55d1c0a1fb90 100644 --- a/drivers/block/paride/epat.c +++ b/drivers/block/paride/epat.c @@ -31,6 +31,12 @@ #define j44(a,b) (((a>>4)&0x0f)+(b&0xf0)) #define j53(a,b) (((a>>3)&0x1f)+((b<<4)&0xe0)) +static int epatc8; + +module_param(epatc8, int, 0); +MODULE_PARM_DESC(epatc8, "support for the Shuttle EP1284 chip, " + "used in any recent Imation SuperDisk (LS-120) drive."); + /* cont = 0 IDE register file cont = 1 IDE control registers cont = 2 internal EPAT registers @@ -209,15 +215,18 @@ static void epat_connect ( PIA *pi ) { pi->saved_r0 = r0(); pi->saved_r2 = r2(); -#ifdef CONFIG_PARIDE_EPATC8 /* Initialize the chip */ - CPP(0);CPP(0x40);CPP(0xe0); - w0(0);w2(1);w2(4); - WR(0x8,0x12);WR(0xc,0x14);WR(0x12,0x10); - WR(0xe,0xf);WR(0xf,4); - /* WR(0xe,0xa);WR(0xf,4); */ - WR(0xe,0xd);WR(0xf,0); - /* CPP(0x30); */ + CPP(0); + + if (epatc8) { + CPP(0x40);CPP(0xe0); + w0(0);w2(1);w2(4); + WR(0x8,0x12);WR(0xc,0x14);WR(0x12,0x10); + WR(0xe,0xf);WR(0xf,4); + /* WR(0xe,0xa);WR(0xf,4); */ + WR(0xe,0xd);WR(0xf,0); + /* CPP(0x30); */ + } /* Connect to the chip */ CPP(0xe0); @@ -227,15 +236,10 @@ static void epat_connect ( PIA *pi ) /* Request EPP */ w0(0x40);w2(6);w2(7);w2(4);w2(0xc);w2(4); } -#else - CPP(0); CPP(0xe0); - w0(0); w2(1); w2(4); - if (pi->mode >= 3) { - w0(0); w2(1); w2(4); w2(0xc); - w0(0x40); w2(6); w2(7); w2(4); w2(0xc); w2(4); + + if (!epatc8) { + WR(8,0x10); WR(0xc,0x14); WR(0xa,0x38); WR(0x12,0x10); } - WR(8,0x10); WR(0xc,0x14); WR(0xa,0x38); WR(0x12,0x10); -#endif } static void epat_disconnect (PIA *pi) @@ -320,6 +324,9 @@ static struct pi_protocol epat = { static int __init epat_init(void) { +#ifdef CONFIG_PARIDE_EPATC8 + epatc8 = 1; +#endif return pi_register(&epat)-1; } |