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-rw-r--r--drivers/block/ide-dma.c473
1 files changed, 99 insertions, 374 deletions
diff --git a/drivers/block/ide-dma.c b/drivers/block/ide-dma.c
index 6a2886f78..bba735580 100644
--- a/drivers/block/ide-dma.c
+++ b/drivers/block/ide-dma.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/block/ide-dma.c Version 4.06 December 3, 1997
+ * linux/drivers/block/ide-dma.c Version 4.07 December 5, 1997
*
* Copyright (c) 1995-1998 Mark Lord
* May be copied or modified under the terms of the GNU General Public License
@@ -49,9 +49,8 @@
* available from ftp://ftp.intel.com/pub/bios/10004bs0.exe
* (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this).
*
- * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for fixing the
- * problem with some (all?) ACER motherboards/BIOSs. Hopefully the fix
- * still works here (?).
+ * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
+ * fixing the problem with the BIOS on some Acer motherboards.
*
* Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing
* "TX" chipset compatibility and for providing patches for the "TX" chipset.
@@ -69,16 +68,12 @@
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
-#include <linux/ioport.h>
#include <linux/interrupt.h>
-#include <linux/blkdev.h>
-#include <linux/hdreg.h>
#include <linux/pci.h>
#include <linux/bios32.h>
-#include <linux/init.h>
#include <asm/io.h>
-#include <asm/dma.h>
+#include <asm/irq.h>
#include "ide.h"
@@ -110,23 +105,19 @@ const char *good_dma_drives[] = {"Micropolis 2112A",
#define PRD_BYTES 8
#define PRD_ENTRIES (PAGE_SIZE / (2 * PRD_BYTES))
-static int config_drive_for_dma (ide_drive_t *);
-
/*
* dma_intr() is the handler for disk read/write DMA interrupts
*/
-static void dma_intr (ide_drive_t *drive)
+void ide_dma_intr (ide_drive_t *drive)
{
- byte stat, dma_stat;
int i;
- struct request *rq = HWGROUP(drive)->rq;
- unsigned short dma_base = HWIF(drive)->dma_base;
+ byte stat, dma_stat;
- dma_stat = inb(dma_base+2); /* get DMA status */
- outb(inb(dma_base)&~1, dma_base); /* stop DMA operation */
+ dma_stat = HWIF(drive)->dmaproc(ide_dma_end, drive);
stat = GET_STAT(); /* get drive status */
if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
- if ((dma_stat & 7) == 4) { /* verify good DMA status */
+ if (!dma_stat) {
+ struct request *rq = HWGROUP(drive)->rq;
rq = HWGROUP(drive)->rq;
for (i = rq->nr_sectors; i > 0;) {
i -= rq->current_nr_sectors;
@@ -134,7 +125,7 @@ static void dma_intr (ide_drive_t *drive)
}
return;
}
- printk("%s: bad DMA status: 0x%02x\n", drive->name, dma_stat);
+ printk("%s: dma_intr: bad DMA status\n", drive->name);
}
sti();
ide_error(drive, "dma_intr", stat);
@@ -195,23 +186,46 @@ int ide_build_dmatable (ide_drive_t *drive)
unsigned long xcount, bcount = 0x10000 - (addr & 0xffff);
if (bcount > size)
bcount = size;
- *table++ = addr;
+ *table++ = cpu_to_le32(addr);
xcount = bcount & 0xffff;
if (is_trm290_chipset)
xcount = ((xcount >> 2) - 1) << 16;
- *table++ = xcount;
+ *table++ = cpu_to_le32(xcount);
addr += bcount;
size -= bcount;
}
}
} while (bh != NULL);
- if (count) {
- if (!is_trm290_chipset)
- *--table |= 0x80000000; /* set End-Of-Table (EOT) bit */
- return count;
+ if (!count)
+ printk("%s: empty DMA table?\n", drive->name);
+ else if (!is_trm290_chipset)
+ *--table |= cpu_to_le32(0x80000000); /* set End-Of-Table (EOT) bit */
+ return count;
+}
+
+static int config_drive_for_dma (ide_drive_t *drive)
+{
+ const char **list;
+ struct hd_driveid *id = drive->id;
+ ide_hwif_t *hwif = HWIF(drive);
+
+ if (id && (id->capability & 1) && !HWIF(drive)->no_autodma) {
+ /* Enable DMA on any drive that has UltraDMA (mode 0/1/2) enabled */
+ if (id->field_valid & 4) /* UltraDMA */
+ if ((id->dma_ultra & (id->dma_ultra >> 8) & 7))
+ return hwif->dmaproc(ide_dma_on, drive);
+ /* Enable DMA on any drive that has mode2 DMA (multi or single) enabled */
+ if (id->field_valid & 2) /* regular DMA */
+ if ((id->dma_mword & 0x404) == 0x404 || (id->dma_1word & 0x404) == 0x404)
+ return hwif->dmaproc(ide_dma_on, drive);
+ /* Consult the list of known "good" drives */
+ list = good_dma_drives;
+ while (*list) {
+ if (!strcmp(*list++,id->model))
+ return hwif->dmaproc(ide_dma_on, drive);
+ }
}
- printk("%s: empty DMA table?\n", drive->name);
- return 0;
+ return hwif->dmaproc(ide_dma_off_quietly, drive);
}
/*
@@ -233,7 +247,7 @@ int ide_build_dmatable (ide_drive_t *drive)
int ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
- unsigned long dma_base = hwif->dma_base;
+ unsigned int dma_base = hwif->dma_base;
unsigned int count, reading = 0;
switch (func) {
@@ -243,21 +257,8 @@ int ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive)
case ide_dma_on:
drive->using_dma = (func == ide_dma_on);
return 0;
- case ide_dma_abort:
- outb(inb(dma_base)&~1, dma_base); /* stop DMA */
- return 0;
case ide_dma_check:
return config_drive_for_dma (drive);
- case ide_dma_status_bad:
- return ((inb(dma_base+2) & 7) != 4); /* verify good DMA status */
- case ide_dma_transferred:
- return 0; /* NOT IMPLEMENTED: number of bytes actually transferred */
- case ide_dma_begin:
- outb(inb(dma_base)|1, dma_base); /* begin DMA */
- return 0;
- default:
- printk("ide_dmaproc: unsupported func: %d\n", func);
- return 1;
case ide_dma_read:
reading = 1 << 3;
case ide_dma_write:
@@ -268,50 +269,37 @@ int ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive)
outb(inb(dma_base+2)|0x06, dma_base+2); /* clear status bits */
if (drive->media != ide_disk)
return 0;
- ide_set_handler(drive, &dma_intr, WAIT_CMD); /* issue cmd to drive */
+ ide_set_handler(drive, &ide_dma_intr, WAIT_CMD);/* issue cmd to drive */
OUT_BYTE(reading ? WIN_READDMA : WIN_WRITEDMA, IDE_COMMAND_REG);
- outb(inb(dma_base)|1, dma_base); /* begin DMA */
+ case ide_dma_begin:
+ outb(inb(dma_base)|1, dma_base); /* start DMA */
return 0;
- }
-}
-
-static int config_drive_for_dma (ide_drive_t *drive)
-{
- const char **list;
- struct hd_driveid *id = drive->id;
- ide_hwif_t *hwif = HWIF(drive);
-
- if (id && (id->capability & 1)) {
- /* Enable DMA on any drive that has UltraDMA (mode 0/1/2) enabled */
- if (id->field_valid & 4) /* UltraDMA */
- if ((id->dma_ultra & (id->dma_ultra >> 8) & 7))
- return hwif->dmaproc(ide_dma_on, drive);
- /* Enable DMA on any drive that has mode2 DMA (multi or single) enabled */
- if (id->field_valid & 2) /* regular DMA */
- if ((id->dma_mword & 0x404) == 0x404 || (id->dma_1word & 0x404) == 0x404)
- return hwif->dmaproc(ide_dma_on, drive);
- /* Consult the list of known "good" drives */
- list = good_dma_drives;
- while (*list) {
- if (!strcmp(*list++,id->model))
- return hwif->dmaproc(ide_dma_on, drive);
+ case ide_dma_end: /* returns 1 on error, 0 otherwise */
+ {
+ byte dma_stat = inb(dma_base+2);
+ int rc = (dma_stat & 7) != 4;
+ outb(inb(dma_base)&~1, dma_base); /* stop DMA */
+ outb(dma_stat|6, dma_base+2); /* clear the INTR & ERROR bits */
+ return rc; /* verify good DMA status */
}
+ default:
+ printk("ide_dmaproc: unsupported func: %d\n", func);
+ return 1;
}
- return hwif->dmaproc(ide_dma_off_quietly, drive);
}
-void ide_setup_dma (ide_hwif_t *hwif, unsigned short dmabase, unsigned int num_ports)
+void ide_setup_dma (ide_hwif_t *hwif, unsigned int dma_base, unsigned int num_ports) /* __init */
{
static unsigned long dmatable = 0;
static unsigned leftover = 0;
- printk(" %s: BM-DMA at 0x%04x-0x%04x", hwif->name, dmabase, dmabase + num_ports - 1);
- if (check_region(dmabase, num_ports)) {
+ printk(" %s: BM-DMA at 0x%04x-0x%04x", hwif->name, dma_base, dma_base + num_ports - 1);
+ if (check_region(dma_base, num_ports)) {
printk(" -- ERROR, PORT ADDRESSES ALREADY IN USE\n");
return;
}
- request_region(dmabase, num_ports, hwif->name);
- hwif->dma_base = dmabase;
+ request_region(dma_base, num_ports, hwif->name);
+ hwif->dma_base = dma_base;
if (leftover < (PRD_ENTRIES * PRD_BYTES)) {
/*
* The BM-DMA uses full 32bit addr, so we can
@@ -328,87 +316,18 @@ void ide_setup_dma (ide_hwif_t *hwif, unsigned short dmabase, unsigned int num_p
dmatable += (PRD_ENTRIES * PRD_BYTES);
leftover -= (PRD_ENTRIES * PRD_BYTES);
hwif->dmaproc = &ide_dmaproc;
+
if (hwif->chipset != ide_trm290) {
- byte dma_stat = inb(dmabase+2);
- printk(", BIOS DMA settings: %s:%s %s:%s",
- hwif->drives[0].name, (dma_stat & 0x20) ? "yes" : "no ",
- hwif->drives[1].name, (dma_stat & 0x40) ? "yes" : "no");
+ byte dma_stat = inb(dma_base+2);
+ printk(", BIOS settings: %s:%s, %s:%s",
+ hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "pio",
+ hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio");
}
printk("\n");
}
}
-#ifdef CONFIG_BLK_DEV_TRM290
-extern void ide_init_trm290(byte, byte, ide_hwif_t *);
-#define INIT_TRM290 (&ide_init_trm290)
-#else
-#define INIT_TRM290 (NULL)
-#endif /* CONFIG_BLK_DEV_TRM290 */
-
-#ifdef CONFIG_BLK_DEV_OPTI621
-extern void ide_init_opti621(byte, byte, ide_hwif_t *);
-#define INIT_OPTI (&ide_init_opti621)
-#else
-#define INIT_OPTI (NULL)
-#endif /* CONFIG_BLK_DEV_OPTI621 */
-
-#define DEVID_PIIX (PCI_VENDOR_ID_INTEL |(PCI_DEVICE_ID_INTEL_82371_1 <<16))
-#define DEVID_PIIX3 (PCI_VENDOR_ID_INTEL |(PCI_DEVICE_ID_INTEL_82371SB_1 <<16))
-#define DEVID_PIIX4 (PCI_VENDOR_ID_INTEL |(PCI_DEVICE_ID_INTEL_82371AB <<16))
-#define DEVID_VP_IDE (PCI_VENDOR_ID_VIA |(PCI_DEVICE_ID_VIA_82C586_1 <<16))
-#define DEVID_PDC20246 (PCI_VENDOR_ID_PROMISE|(PCI_DEVICE_ID_PROMISE_20246 <<16))
-#define DEVID_RZ1000 (PCI_VENDOR_ID_PCTECH |(PCI_DEVICE_ID_PCTECH_RZ1000 <<16))
-#define DEVID_RZ1001 (PCI_VENDOR_ID_PCTECH |(PCI_DEVICE_ID_PCTECH_RZ1001 <<16))
-#define DEVID_CMD640 (PCI_VENDOR_ID_CMD |(PCI_DEVICE_ID_CMD_640 <<16))
-#define DEVID_CMD646 (PCI_VENDOR_ID_CMD |(PCI_DEVICE_ID_CMD_646 <<16))
-#define DEVID_SIS5513 (PCI_VENDOR_ID_SI |(PCI_DEVICE_ID_SI_5513 <<16))
-#define DEVID_OPTI (PCI_VENDOR_ID_OPTI |(PCI_DEVICE_ID_OPTI_82C621 <<16))
-#define DEVID_OPTI2 (PCI_VENDOR_ID_OPTI |(0xd568 /* from datasheets */ <<16))
-#define DEVID_TRM290 (PCI_VENDOR_ID_TEKRAM |(PCI_DEVICE_ID_TEKRAM_DC290 <<16))
-#define DEVID_NS87410 (PCI_VENDOR_ID_NS |(PCI_DEVICE_ID_NS_87410 <<16))
-#define DEVID_HT6565 (PCI_VENDOR_ID_HOLTEK |(PCI_DEVICE_ID_HOLTEK_6565 <<16))
-
-typedef struct ide_pci_enablebit_s {
- byte reg; /* byte pci reg holding the enable-bit */
- byte mask; /* mask to isolate the enable-bit */
- byte val; /* value of masked reg when "enabled" */
-} ide_pci_enablebit_t;
-
-typedef struct ide_pci_device_s {
- unsigned int id;
- const char *name;
- void (*init_hwif)(byte bus, byte fn, ide_hwif_t *hwif);
- ide_pci_enablebit_t enablebits[2];
-} ide_pci_device_t;
-
-static ide_pci_device_t ide_pci_chipsets[] = {
- {DEVID_PIIX, "PIIX", NULL, {{0x41,0x80,0x80}, {0x43,0x80,0x80}} },
- {DEVID_PIIX3, "PIIX3", NULL, {{0x41,0x80,0x80}, {0x43,0x80,0x80}} },
- {DEVID_PIIX4, "PIIX4", NULL, {{0x41,0x80,0x80}, {0x43,0x80,0x80}} },
- {DEVID_VP_IDE, "VP_IDE", NULL, {{0x40,0x02,0x02}, {0x40,0x01,0x01}} },
- {DEVID_PDC20246,"PDC20246", NULL, {{0x50,0x02,0x02}, {0x50,0x04,0x04}} },
- {DEVID_RZ1000, NULL, NULL, {{0x00,0x00,0x00}, {0x00,0x00,0x00}} },
- {DEVID_RZ1001, NULL, NULL, {{0x00,0x00,0x00}, {0x00,0x00,0x00}} },
- {DEVID_CMD640, NULL, NULL, {{0x00,0x00,0x00}, {0x00,0x00,0x00}} },
- {DEVID_OPTI, "OPTI", INIT_OPTI, {{0x45,0x80,0x00}, {0x40,0x08,0x00}} },
- {DEVID_OPTI2, "OPTI2", INIT_OPTI, {{0x45,0x80,0x00}, {0x40,0x08,0x00}} },
- {DEVID_SIS5513, "SIS5513", NULL, {{0x4a,0x02,0x02}, {0x4a,0x04,0x04}} },
- {DEVID_CMD646, "CMD646", NULL, {{0x00,0x00,0x00}, {0x51,0x80,0x80}} },
- {DEVID_TRM290, "TRM290", INIT_TRM290, {{0x00,0x00,0x00}, {0x00,0x00,0x00}} },
- {DEVID_NS87410, "NS87410", NULL, {{0x43,0x08,0x08}, {0x47,0x08,0x08}} },
- {DEVID_HT6565, "HT6565", NULL, {{0x00,0x00,0x00}, {0x00,0x00,0x00}} },
- {0, "PCI_IDE", NULL, {{0x00,0x00,0x00}, {0x00,0x00,0x00}} }};
-
-__initfunc(static ide_pci_device_t *lookup_devid(unsigned int devid))
-{
- ide_pci_device_t *d = ide_pci_chipsets;
- while (d->id && d->id != devid)
- ++d;
- return d;
-}
-
-/* The next two functions were stolen from cmd640.c, with
- a few modifications */
+/* The next two functions were stolen from cmd640.c, with a few modifications */
__initfunc(static void write_pcicfg_dword (byte fn, unsigned short reg, long val))
{
@@ -435,244 +354,50 @@ __initfunc(static long read_pcicfg_dword (byte fn, unsigned short reg))
}
/*
- * Search for an (apparently) unused block of I/O space
- * of "size" bytes in length.
- */
-__initfunc(static short find_free_region (unsigned short size))
-{
- unsigned short i, base = 0xe800;
- for (base = 0xe800; base > 0; base -= 0x800) {
- if (!check_region(base,size)) {
- for (i = 0; i < size; i++) {
- if (inb(base+i) != 0xff)
- goto next;
- }
- return base; /* success */
- }
- next:
- }
- return 0; /* failure */
-}
-
-/*
- * Fetch the Bus-Master I/O Base-Address (BMIBA) from PCI space:
+ * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space:
*/
-__initfunc(static unsigned int ide_get_or_set_bmiba (byte bus, byte fn, const char *name))
+unsigned int ide_get_or_set_dma_base (ide_hwif_t *hwif, int extra, const char *name) /* __init */
{
- unsigned int bmiba = 0;
- unsigned short base;
- int rc;
-
- if ((rc = pcibios_read_config_dword(bus, fn, 0x20, &bmiba))) {
- printk("%s: failed to read BMIBA\n", name);
- } else if ((bmiba &= 0xfff0) == 0) {
- printk("%s: BMIBA is invalid (0x%04x, BIOS problem)\n", name, bmiba);
- base = find_free_region(16);
- if (base) {
- printk("%s: setting BMIBA to 0x%04x\n", name, base);
- pcibios_write_config_dword(bus, fn, 0x20, base | 1);
- pcibios_read_config_dword(bus, fn, 0x20, &bmiba);
- bmiba &= 0xfff0;
- if (bmiba != base) {
+ unsigned int new, dma_base = 0;
+ byte bus = hwif->pci_bus, fn = hwif->pci_fn;
+
+ if (hwif->mate && hwif->mate->dma_base) {
+ dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
+ } else if (pcibios_read_config_dword(bus, fn, 0x20, &dma_base)) {
+ printk("%s: failed to read dma_base\n", name);
+ dma_base = 0;
+ } else if ((dma_base &= ~0xf) == 0 || dma_base == ~0xf) {
+ printk("%s: dma_base is invalid (0x%04x, BIOS problem)\n", name, dma_base);
+ new = ide_find_free_region(16 + extra);
+ hwif->no_autodma = 1; /* default DMA off if we had to configure it here */
+ if (new) {
+ printk("%s: setting dma_base to 0x%04x\n", name, new);
+ new |= 1;
+ (void) pcibios_write_config_dword(bus, fn, 0x20, new);
+ (void) pcibios_read_config_dword(bus, fn, 0x20, &dma_base);
+ if (dma_base != new) {
if (bus == 0) {
printk("%s: operation failed, bypassing BIOS to try again\n", name);
- write_pcicfg_dword(fn, 0x20, base | 1);
- bmiba = read_pcicfg_dword(fn, 0x20) & 0xfff0;
+ write_pcicfg_dword(fn, 0x20, new);
+ dma_base = read_pcicfg_dword(fn, 0x20);
}
- if (bmiba != base) {
+ if (dma_base != new) {
printk("%s: operation failed, DMA disabled\n", name);
- bmiba = 0;
+ dma_base = 0;
}
}
+ dma_base &= ~0xf;
}
}
- return bmiba;
-}
-
-/*
- * Match a PCI IDE port against an entry in ide_hwifs[],
- * based on io_base port if possible.
- */
-__initfunc(ide_hwif_t *ide_match_hwif (unsigned int io_base))
-{
- int h;
- ide_hwif_t *hwif;
-
- /*
- * Look for a hwif with matching io_base specified using
- * parameters to ide_setup().
- */
- for (h = 0; h < MAX_HWIFS; ++h) {
- hwif = &ide_hwifs[h];
- if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
- if (hwif->chipset == ide_generic)
- return hwif; /* a perfect match */
- }
- }
- /*
- * Look for a hwif with matching io_base default value.
- * If chipset is "ide_unknown", then claim that hwif slot.
- * Otherwise, some other chipset has already claimed it.. :(
- */
- for (h = 0; h < MAX_HWIFS; ++h) {
- hwif = &ide_hwifs[h];
- if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
- if (hwif->chipset == ide_unknown)
- return hwif; /* match */
- return NULL; /* already claimed */
- }
- }
- /*
- * Okay, there is no hwif matching our io_base,
- * so we'll just claim an unassigned slot.
- * Give preference to claiming ide2/ide3 before ide0/ide1,
- * just in case there's another interface yet-to-be-scanned
- * which uses ports 1f0/170 (the ide0/ide1 defaults).
- */
- for (h = 0; h < MAX_HWIFS; ++h) {
- int hwifs[] = {2,3,1,0}; /* assign 3rd/4th before 1st/2nd */
- hwif = &ide_hwifs[hwifs[h]];
- if (hwif->chipset == ide_unknown)
- return hwif; /* pick an unused entry */
- }
- return NULL;
-}
-
-/*
- * ide_setup_pci_device() looks at the primary/secondary interfaces
- * on a PCI IDE device and, if they are enabled, prepares the IDE driver
- * for use with them. This generic code works for most PCI chipsets.
- *
- * One thing that is not standardized is the location of the
- * primary/secondary interface "enable/disable" bits. For chipsets that
- * we "know" about, this information is in the ide_pci_device_t struct;
- * for all other chipsets, we just assume both interfaces are enabled.
- */
-__initfunc(static void ide_setup_pci_device (byte bus, byte fn, unsigned int bmiba, ide_pci_device_t *d))
-{
- unsigned int port, at_least_one_hwif_enabled = 0;
- unsigned short base = 0, ctl = 0;
- byte tmp = 0;
- ide_hwif_t *hwif, *mate = NULL;
-
- for (port = 0; port <= 1; ++port) {
- ide_pci_enablebit_t *e = &(d->enablebits[port]);
- if (e->reg) {
- if (pcibios_read_config_byte(bus, fn, e->reg, &tmp)) {
- printk("%s: unable to read pci reg 0x%x\n", d->name, e->reg);
- } else if ((tmp & e->mask) != e->val)
- continue; /* port not enabled */
- }
- if (pcibios_read_config_word(bus, fn, 0x14+(port*8), &ctl))
- ctl = 0;
- if ((ctl &= 0xfffc) == 0)
- ctl = 0x3f4 ^ (port << 7);
- if (pcibios_read_config_word(bus, fn, 0x10+(port*8), &base))
- base = 0;
- if ((base &= 0xfff8) == 0)
- base = 0x1F0 ^ (port << 7);
- if ((hwif = ide_match_hwif(base)) == NULL) {
- printk("%s: no room in hwif table for port %d\n", d->name, port);
- continue;
- }
- hwif->chipset = ide_pci;
- hwif->pci_port = port;
- if (mate) {
- hwif->mate = mate;
- mate->mate = hwif;
- }
- mate = hwif; /* for next iteration */
- if (hwif->io_ports[IDE_DATA_OFFSET] != base) {
- ide_init_hwif_ports(hwif->io_ports, base, NULL);
- hwif->io_ports[IDE_CONTROL_OFFSET] = ctl + 2;
- }
- if (bmiba) {
- if ((inb(bmiba+2) & 0x80)) { /* simplex DMA only? */
- printk("%s: simplex device: DMA disabled\n", d->name);
- } else { /* supports simultaneous DMA on both channels */
- ide_setup_dma(hwif, bmiba + (8 * port), 8);
- }
- }
- if (d->id) { /* For "known" chipsets, allow other irqs during i/o */
- hwif->drives[0].unmask = 1;
- hwif->drives[1].unmask = 1;
- }
- if (d->init_hwif) /* Call chipset-specific routine for each enabled hwif */
- d->init_hwif(bus, fn, hwif);
- at_least_one_hwif_enabled = 1;
- }
- if (!at_least_one_hwif_enabled)
- printk("%s: neither IDE port enabled (BIOS)\n", d->name);
-}
-
-/*
- * ide_scan_pci_device() examines all functions of a PCI device,
- * looking for IDE interfaces and/or devices in ide_pci_chipsets[].
- */
-__initfunc(static inline void ide_scan_pci_device (unsigned int bus, unsigned int fn))
-{
- unsigned int devid, ccode;
- unsigned short pcicmd, class;
- ide_pci_device_t *d;
- byte hedt, progif;
-
- if (pcibios_read_config_byte(bus, fn, 0x0e, &hedt))
- hedt = 0;
- do {
- if (pcibios_read_config_dword(bus, fn, 0x00, &devid)
- || devid == 0xffffffff
- || pcibios_read_config_dword(bus, fn, 0x08, &ccode))
- return;
- d = lookup_devid(devid);
- if (d->name == NULL) /* some chips (cmd640, rz1000) are handled elsewhere */
- continue;
- progif = (ccode >> 8) & 0xff;
- class = ccode >> 16;
- if (d->id || class == PCI_CLASS_STORAGE_IDE) {
- if (d->id)
- printk("%s: IDE device on PCI bus %d function %d\n", d->name, bus, fn);
- else
- printk("%s: unknown IDE device on PCI bus %d function %d, VID=%04x, DID=%04x\n",
- d->name, bus, fn, devid & 0xffff, devid >> 16);
- /*
- * See if IDE ports are enabled
- */
- if (pcibios_read_config_word(bus, fn, 0x04, &pcicmd)) {
- printk("%s: error accessing PCICMD\n", d->name);
- } else if ((pcicmd & 1) == 0) {
- printk("%s: device disabled (BIOS)\n", d->name);
- } else {
- unsigned int bmiba = 0;
- /*
- * Check for Bus-Master DMA capability
- */
- if (d->id == DEVID_PDC20246 || (class == PCI_CLASS_STORAGE_IDE && (progif & 0x80))) {
- if ((!(pcicmd & 4) || !(bmiba = ide_get_or_set_bmiba(bus, fn, d->name)))) {
- printk("%s: Bus-Master DMA disabled (BIOS), pcicmd=0x%04x, progif=0x%02x, bmiba=0x%04x\n", d->name, pcicmd, progif, bmiba);
- }
- }
- /*
- * Setup the IDE ports
- */
- ide_setup_pci_device(bus, fn, bmiba, d);
- }
- }
- } while (hedt == 0x80 && (++fn & 7));
-}
-
-/*
- * ide_scan_pcibus() gets invoked at boot time from ide.c
- */
-__initfunc(void ide_scan_pcibus (void))
-{
- unsigned int bus, dev;
-
- if (!pcibios_present())
- return;
- for (bus = 0; bus <= 255; ++bus) {
- for (dev = 0; dev <= 31; ++dev) {
- ide_scan_pci_device(bus, dev << 3);
+ if (dma_base) {
+ if (extra) /* PDC20246 */
+ request_region(dma_base+16, extra, name);
+ dma_base += hwif->channel ? 8 : 0;
+ if (inb(dma_base+2) & 0x80) {
+ printk("%s: simplex device: DMA disabled\n", name);
+ dma_base = 0;
}
}
+ return dma_base;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 02:27:54 +0000