Commit 83a6d4ab authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Bartlomiej Zolnierkiewicz

cmd64x: init. code cleanup

Fix two minor issues with PCI0646 chip reporting in the init_chipset() method:
"IRQ workaround enabled" message printed out not only for revision 0x01 and
"CMD646: chipset revision" printed twice (by IDE core and the driver itself).
Also, remove empty/pointless switch cases for the chips other than PCI0646,
duplicate write to the MRDMODE register when enabling interrupts and MEMORY
READ LINE cycles, and needless/misplaced initialization of the timing registers
in this method.
Switch to reading only the PCI revision ID register itself, not the whole 32
bits at its address in init_chipset() and init_hwif() methods; in addition,
get rid of the useless clearing of hwif->autodma and perform some cosmetic
style changes in the latter method.
Refactor ata66_cmd64x() by moving all the code into the 'switch' statement,
renaming/adding variables, and fixing the coding style.
While at it, finally get rid of the meaningless aliasing register #define's...
Signed-off-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 2648e5d9
/* /*
* linux/drivers/ide/pci/cmd64x.c Version 1.47 Mar 19, 2007 * linux/drivers/ide/pci/cmd64x.c Version 1.50 May 10, 2007
* *
* cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines. * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
* Due to massive hardware bugs, UltraDMA is only supported * Due to massive hardware bugs, UltraDMA is only supported
...@@ -52,9 +52,6 @@ ...@@ -52,9 +52,6 @@
#define ARTTIM23_DIS_RA2 0x04 #define ARTTIM23_DIS_RA2 0x04
#define ARTTIM23_DIS_RA3 0x08 #define ARTTIM23_DIS_RA3 0x08
#define ARTTIM23_INTR_CH1 0x10 #define ARTTIM23_INTR_CH1 0x10
#define ARTTIM2 0x57
#define ARTTIM3 0x57
#define DRWTIM23 0x58
#define DRWTIM2 0x58 #define DRWTIM2 0x58
#define BRST 0x59 #define BRST 0x59
#define DRWTIM3 0x5b #define DRWTIM3 0x5b
...@@ -469,71 +466,43 @@ static int cmd646_1_ide_dma_end (ide_drive_t *drive) ...@@ -469,71 +466,43 @@ static int cmd646_1_ide_dma_end (ide_drive_t *drive)
static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const char *name) static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const char *name)
{ {
u32 class_rev = 0;
u8 mrdmode = 0; u8 mrdmode = 0;
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev); if (dev->device == PCI_DEVICE_ID_CMD_646) {
class_rev &= 0xff; u8 rev = 0;
switch(dev->device) { pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
case PCI_DEVICE_ID_CMD_643:
break; switch (rev) {
case PCI_DEVICE_ID_CMD_646: case 0x07:
printk(KERN_INFO "%s: chipset revision 0x%02X, ", name, class_rev); case 0x05:
switch(class_rev) { printk("%s: UltraDMA capable", name);
case 0x07:
case 0x05:
printk("UltraDMA Capable");
break;
case 0x03:
printk("MultiWord DMA Force Limited");
break;
case 0x01:
default:
printk("MultiWord DMA Limited, IRQ workaround enabled");
break;
}
printk("\n");
break;
case PCI_DEVICE_ID_CMD_648:
case PCI_DEVICE_ID_CMD_649:
break; break;
case 0x03:
default: default:
printk("%s: MultiWord DMA force limited", name);
break;
case 0x01:
printk("%s: MultiWord DMA limited, "
"IRQ workaround enabled\n", name);
break; break;
}
} }
/* Set a good latency timer and cache line size value. */ /* Set a good latency timer and cache line size value. */
(void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64); (void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
/* FIXME: pci_set_master() to ensure a good latency timer value */ /* FIXME: pci_set_master() to ensure a good latency timer value */
/* Setup interrupts. */ /*
(void) pci_read_config_byte(dev, MRDMODE, &mrdmode); * Enable interrupts, select MEMORY READ LINE for reads.
mrdmode &= ~(0x30); *
(void) pci_write_config_byte(dev, MRDMODE, mrdmode); * NOTE: although not mentioned in the PCI0646U specs,
* bits 0-1 are write only and won't be read back as
/* Use MEMORY READ LINE for reads. * set or not -- PCI0646U2 specs clarify this point.
* NOTE: Although not mentioned in the PCI0646U specs,
* these bits are write only and won't be read
* back as set or not. The PCI0646U2 specs clarify
* this point.
*/ */
(void) pci_write_config_byte(dev, MRDMODE, mrdmode | 0x02); (void) pci_read_config_byte (dev, MRDMODE, &mrdmode);
mrdmode &= ~0x30;
/* Set reasonable active/recovery/address-setup values. */ (void) pci_write_config_byte(dev, MRDMODE, (mrdmode | 0x02));
(void) pci_write_config_byte(dev, ARTTIM0, 0x40);
(void) pci_write_config_byte(dev, DRWTIM0, 0x3f);
(void) pci_write_config_byte(dev, ARTTIM1, 0x40);
(void) pci_write_config_byte(dev, DRWTIM1, 0x3f);
#ifdef __i386__
(void) pci_write_config_byte(dev, ARTTIM23, 0x1c);
#else
(void) pci_write_config_byte(dev, ARTTIM23, 0x5c);
#endif
(void) pci_write_config_byte(dev, DRWTIM23, 0x3f);
(void) pci_write_config_byte(dev, DRWTIM3, 0x3f);
#ifdef CONFIG_PPC
(void) pci_write_config_byte(dev, UDIDETCR0, 0xf0);
#endif /* CONFIG_PPC */
#if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS) #if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
...@@ -550,27 +519,25 @@ static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const cha ...@@ -550,27 +519,25 @@ static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const cha
static unsigned int __devinit ata66_cmd64x(ide_hwif_t *hwif) static unsigned int __devinit ata66_cmd64x(ide_hwif_t *hwif)
{ {
u8 ata66 = 0, mask = (hwif->channel) ? 0x02 : 0x01; struct pci_dev *dev = hwif->pci_dev;
u8 bmidecsr = 0, mask = hwif->channel ? 0x02 : 0x01;
switch(hwif->pci_dev->device) { switch (dev->device) {
case PCI_DEVICE_ID_CMD_643: case PCI_DEVICE_ID_CMD_648:
case PCI_DEVICE_ID_CMD_646: case PCI_DEVICE_ID_CMD_649:
return ata66; pci_read_config_byte(dev, BMIDECSR, &bmidecsr);
default: return (bmidecsr & mask) ? 1 : 0;
break; default:
return 0;
} }
pci_read_config_byte(hwif->pci_dev, BMIDECSR, &ata66);
return (ata66 & mask) ? 1 : 0;
} }
static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
{ {
struct pci_dev *dev = hwif->pci_dev; struct pci_dev *dev = hwif->pci_dev;
unsigned int class_rev; u8 rev = 0;
hwif->autodma = 0; pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xff;
hwif->tuneproc = &cmd64x_tune_drive; hwif->tuneproc = &cmd64x_tune_drive;
hwif->speedproc = &cmd64x_tune_chipset; hwif->speedproc = &cmd64x_tune_chipset;
...@@ -580,8 +547,8 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) ...@@ -580,8 +547,8 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
if (!hwif->dma_base) if (!hwif->dma_base)
return; return;
hwif->atapi_dma = 1; hwif->atapi_dma = 1;
hwif->mwdma_mask = 0x07;
hwif->ultra_mask = hwif->cds->udma_mask; hwif->ultra_mask = hwif->cds->udma_mask;
/* /*
...@@ -596,16 +563,15 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) ...@@ -596,16 +563,15 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
* *
* So we only do UltraDMA on revision 0x05 and 0x07 chipsets. * So we only do UltraDMA on revision 0x05 and 0x07 chipsets.
*/ */
if (dev->device == PCI_DEVICE_ID_CMD_646 && class_rev < 5) if (dev->device == PCI_DEVICE_ID_CMD_646 && rev < 5)
hwif->ultra_mask = 0x00; hwif->ultra_mask = 0x00;
hwif->mwdma_mask = 0x07;
hwif->ide_dma_check = &cmd64x_config_drive_for_dma; hwif->ide_dma_check = &cmd64x_config_drive_for_dma;
if (!(hwif->udma_four))
if (!hwif->udma_four)
hwif->udma_four = ata66_cmd64x(hwif); hwif->udma_four = ata66_cmd64x(hwif);
switch(dev->device) { switch (dev->device) {
case PCI_DEVICE_ID_CMD_648: case PCI_DEVICE_ID_CMD_648:
case PCI_DEVICE_ID_CMD_649: case PCI_DEVICE_ID_CMD_649:
alt_irq_bits: alt_irq_bits:
...@@ -614,10 +580,10 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) ...@@ -614,10 +580,10 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
break; break;
case PCI_DEVICE_ID_CMD_646: case PCI_DEVICE_ID_CMD_646:
hwif->chipset = ide_cmd646; hwif->chipset = ide_cmd646;
if (class_rev == 0x01) { if (rev == 0x01) {
hwif->ide_dma_end = &cmd646_1_ide_dma_end; hwif->ide_dma_end = &cmd646_1_ide_dma_end;
break; break;
} else if (class_rev >= 0x03) } else if (rev >= 0x03)
goto alt_irq_bits; goto alt_irq_bits;
/* fall thru */ /* fall thru */
default: default:
...@@ -626,11 +592,9 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) ...@@ -626,11 +592,9 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
break; break;
} }
if (!noautodma) if (!noautodma)
hwif->autodma = 1; hwif->autodma = 1;
hwif->drives[0].autodma = hwif->autodma; hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
} }
static int __devinit init_setup_cmd64x(struct pci_dev *dev, ide_pci_device_t *d) static int __devinit init_setup_cmd64x(struct pci_dev *dev, ide_pci_device_t *d)
......
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