Re: [PATCH] HPT3x7: merge speedproc handlers

Sergei Shtylyov
2006-06-04T22:25:30Z

[-- Attachment #1: Type: text/plain, Size: 666 bytes --]

Continue with the driver rewrite:

- move the interrupt twiddling code from the speedproc handlers into the
init_hwif_hpt366 which allows to merge the two HPT37x speedproc handlers
into one;

- get rid of in init_hpt366 which solely consists of the duplicate code, then
fold init_hpt37x() into init_chipset_hpt366();

- fix hpt3xx_tune_drive() to always set the PIO mode requested, not the best
possible one, change hpt366_config_drive_xfer_rate() accordingly, simplify
it a bit;

- group all the DMA related code together init_hwif_hpt366(), and generally
clean up and beautify it.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>

[-- Attachment #2: HPT37x-merge-speedproc.patch --]
[-- Type: text/plain, Size: 13096 bytes --]

Index: linux-2.6/drivers/ide/pci/hpt366.c
===================================================================
--- linux-2.6.orig/drivers/ide/pci/hpt366.c
+++ linux-2.6/drivers/ide/pci/hpt366.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/ide/pci/hpt366.c Version 0.50 May 28, 2006
+ * linux/drivers/ide/pci/hpt366.c Version 0.51 Jun 04, 2006
*
* Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
* Portions Copyright (C) 2001 Sun Microsystems, Inc.
@@ -83,13 +83,17 @@
* - cache the channel's MCRs' offset; only touch the relevant MCR when detecting
* the cable type on HPT374's function 1
* - rename all the register related variables consistently
- * - make HPT36x's speedproc handler look the same way as HPT37x ones; fix the
- * PIO timing register mask for HPT37x
+ * - move the interrupt twiddling code from the speedproc handlers into the
+ * init_hwif handler, also grouping all the DMA related code together there;
+ * simplify the init_chipset handler
+ * - merge two HPT37x speedproc handlers and fix the PIO timing register mask
+ * there; make HPT36x speedproc handler look the same way as the HPT37x one
+ * - fix the tuneproc handler to always set the PIO mode requested, not the
+ * best possible one
* <source@mvista.com>
*
*/

-
#include <linux/config.h>
#include <linux/types.h>
#include <linux/module.h>
@@ -503,19 +507,9 @@ static int hpt36x_tune_chipset(ide_drive
struct hpt_info *info = ide_get_hwifdata (hwif);
u8 speed = hpt3xx_ratefilter(drive, xferspeed);
u8 itr_addr = drive->dn ? 0x44 : 0x40;
- u8 mcr_addr = hwif->select_data + 1;
- u8 mcr = 0;
- u32 new_itr, old_itr = 0;
u32 itr_mask = (speed < XFER_MW_DMA_0) ? 0x30070000 : 0xc0000000;
-
- /*
- * Disable the "fast interrupt" prediction.
- */
- pci_read_config_byte(dev, mcr_addr, &mcr);
- if (mcr & 0x80)
- pci_write_config_byte(dev, mcr_addr, mcr & ~0x80);
-
- new_itr = pci_bus_clock_list(speed, info->speed);
+ u32 new_itr = pci_bus_clock_list(speed, info->speed);
+ u32 old_itr = 0;

/*
* Disable on-chip PIO FIFO/buffer (and PIO MST mode as well)
@@ -530,38 +524,16 @@ static int hpt36x_tune_chipset(ide_drive
return ide_config_drive_speed(drive, speed);
}

-static int hpt370_tune_chipset(ide_drive_t *drive, u8 xferspeed)
+static int hpt37x_tune_chipset(ide_drive_t *drive, u8 xferspeed)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
struct hpt_info *info = ide_get_hwifdata (hwif);
u8 speed = hpt3xx_ratefilter(drive, xferspeed);
- u8 mcr_addr = hwif->select_data + 1;
u8 itr_addr = 0x40 + (drive->dn * 4);
- u8 new_mcr = 0, old_mcr = 0;
- u32 new_itr, old_itr = 0;
u32 itr_mask = (speed < XFER_MW_DMA_0) ? 0x303c0000 : 0xc0000000;
-
- /*
- * Disable the "fast interrupt" prediction.
- * don't holdoff on interrupts. (== 0x01 despite what the docs say)
- */
- pci_read_config_byte(dev, mcr_addr, &old_mcr);
- new_mcr = old_mcr;
- if (new_mcr & 0x02)
- new_mcr &= ~0x02;
-
-#ifdef HPT_DELAY_INTERRUPT
- if (new_mcr & 0x01)
- new_mcr &= ~0x01;
-#else
- if ((new_mcr & 0x01) == 0)
- new_mcr |= 0x01;
-#endif
- if (new_mcr != old_mcr)
- pci_write_config_byte(dev, mcr_addr, new_mcr);
-
- new_itr = pci_bus_clock_list(speed, info->speed);
+ u32 new_itr = pci_bus_clock_list(speed, info->speed);
+ u32 old_itr = 0;

pci_read_config_dword(dev, itr_addr, &old_itr);
new_itr = (new_itr & ~itr_mask) | (old_itr & itr_mask);
@@ -573,71 +545,34 @@ static int hpt370_tune_chipset(ide_drive
return ide_config_drive_speed(drive, speed);
}

-static int hpt372_tune_chipset(ide_drive_t *drive, u8 xferspeed)
+static int hpt3xx_tune_chipset(ide_drive_t *drive, u8 speed)
{
ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
- struct hpt_info *info = ide_get_hwifdata (hwif);
- u8 speed = hpt3xx_ratefilter(drive, xferspeed);
- u8 mcr_addr = hwif->select_data + 1;
- u8 itr_addr = 0x40 + (drive->dn * 4);
- u8 mcr = 0;
- u32 new_itr, old_itr = 0;
- u32 itr_mask = (speed < XFER_MW_DMA_0) ? 0x303c0000 : 0xc0000000;
-
- /*
- * Disable the "fast interrupt" prediction.
- * don't holdoff on interrupts. (== 0x01 despite what the docs say)
- */
- pci_read_config_byte (dev, mcr_addr, &mcr);
- pci_write_config_byte(dev, mcr_addr, (mcr & ~0x07));
-
- new_itr = pci_bus_clock_list(speed, info->speed);
- pci_read_config_dword(dev, itr_addr, &old_itr);
- new_itr = (new_itr & ~itr_mask) | (old_itr & itr_mask);
- if (speed < XFER_MW_DMA_0)
- new_itr &= ~0x80000000; /* Disable on-chip PIO FIFO/buffer */
- pci_write_config_dword(dev, itr_addr, new_itr);
-
- return ide_config_drive_speed(drive, speed);
-}
-
-static int hpt3xx_tune_chipset (ide_drive_t *drive, u8 speed)
-{
- ide_hwif_t *hwif = drive->hwif;
struct hpt_info *info = ide_get_hwifdata(hwif);

- if (info->revision >= 8)
- return hpt372_tune_chipset(drive, speed); /* not a typo */
- else if (info->revision >= 5)
- return hpt372_tune_chipset(drive, speed);
- else if (info->revision >= 3)
- return hpt370_tune_chipset(drive, speed);
+ if (info->revision >= 3)
+ return hpt37x_tune_chipset(drive, speed);
else /* hpt368: hpt_minimum_revision(dev, 2) */
return hpt36x_tune_chipset(drive, speed);
}

-static void hpt3xx_tune_drive (ide_drive_t *drive, u8 pio)
+static void hpt3xx_tune_drive(ide_drive_t *drive, u8 pio)
{
- pio = ide_get_best_pio_mode(drive, 255, pio, NULL);
- (void) hpt3xx_tune_chipset(drive, (XFER_PIO_0 + pio));
+ pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
+ (void) hpt3xx_tune_chipset (drive, XFER_PIO_0 + pio);
}

/*
* This allows the configuration of ide_pci chipset registers
* for cards that learn about the drive's UDMA, DMA, PIO capabilities
- * after the drive is reported by the OS. Initially for designed for
+ * after the drive is reported by the OS. Initially designed for
* HPT366 UDMA chipset by HighPoint|Triones Technologies, Inc.
*
- * check_in_drive_lists(drive, bad_ata66_4)
- * check_in_drive_lists(drive, bad_ata66_3)
- * check_in_drive_lists(drive, bad_ata33)
- *
*/
-static int config_chipset_for_dma (ide_drive_t *drive)
+static int config_chipset_for_dma(ide_drive_t *drive)
{
u8 speed = ide_dma_speed(drive, hpt3xx_ratemask(drive));
- ide_hwif_t *hwif = drive->hwif;
+ ide_hwif_t *hwif = HWIF(drive);
struct hpt_info *info = ide_get_hwifdata(hwif);

if (!speed)
@@ -662,7 +597,7 @@ static int hpt3xx_quirkproc(ide_drive_t
return 0;
}

-static void hpt3xx_intrproc (ide_drive_t *drive)
+static void hpt3xx_intrproc(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);

@@ -672,7 +607,7 @@ static void hpt3xx_intrproc (ide_drive_t
hwif->OUTB(drive->ctl | 2, IDE_CONTROL_REG);
}

-static void hpt3xx_maskproc (ide_drive_t *drive, int mask)
+static void hpt3xx_maskproc(ide_drive_t *drive, int mask)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
@@ -701,25 +636,22 @@ static void hpt3xx_maskproc (ide_drive_t
IDE_CONTROL_REG);
}

-static int hpt366_config_drive_xfer_rate (ide_drive_t *drive)
+static int hpt366_config_drive_xfer_rate(ide_drive_t *drive)
{
- ide_hwif_t *hwif = drive->hwif;
+ ide_hwif_t *hwif = HWIF(drive);
struct hd_driveid *id = drive->id;

drive->init_speed = 0;

if ((id->capability & 1) && drive->autodma) {
-
- if (ide_use_dma(drive)) {
- if (config_chipset_for_dma(drive))
- return hwif->ide_dma_on(drive);
- }
+ if (ide_use_dma(drive) && config_chipset_for_dma(drive))
+ return hwif->ide_dma_on(drive);

goto fast_ata_pio;

} else if ((id->capability & 8) || (id->field_valid & 2)) {
fast_ata_pio:
- hpt3xx_tune_drive(drive, 5);
+ hpt3xx_tune_drive(drive, 255);
return hwif->ide_dma_off_quietly(drive);
}
/* IORDY not supported */
@@ -1150,34 +1082,8 @@ init_hpt37X_done:
udelay(100);
}

-static int __devinit init_hpt37x(struct pci_dev *dev)
-{
- u8 scr1;
-
- pci_read_config_byte (dev, 0x5a, &scr1);
- /* interrupt force enable */
- pci_write_config_byte(dev, 0x5a, (scr1 & ~0x10));
- return 0;
-}
-
-static int __devinit init_hpt366(struct pci_dev *dev)
-{
- u8 mcr = 0;
-
- /*
- * Disable the "fast interrupt" prediction.
- */
- pci_read_config_byte(dev, 0x51, &mcr);
- if (mcr & 0x80)
- pci_write_config_byte(dev, 0x51, mcr & ~0x80);
-
- return 0;
-}
-
static unsigned int __devinit init_chipset_hpt366(struct pci_dev *dev, const char *name)
{
- int ret = 0;
-
/*
* FIXME: Not portable. Also, why do we enable the ROM in the first place?
* We don't seem to be using it.
@@ -1191,23 +1097,25 @@ static unsigned int __devinit init_chips
pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);

- if (hpt_revision(dev) >= 3)
- ret = init_hpt37x(dev);
- else
- ret = init_hpt366(dev);
+ if (hpt_revision(dev) >= 3) {
+ u8 scr1 = 0;

- if (ret)
- return ret;
+ /* Interrupt force enable. */
+ pci_read_config_byte(dev, 0x5a, &scr1);
+ if (scr1 & 0x10)
+ pci_write_config_byte(dev, 0x5a, scr1 & ~0x10);
+ }

return dev->irq;
}

static void __devinit init_hwif_hpt366(ide_hwif_t *hwif)
{
- struct pci_dev *dev = hwif->pci_dev;
+ struct pci_dev *dev = hwif->pci_dev;
struct hpt_info *info = ide_get_hwifdata(hwif);
int serialize = HPT_SERIALIZE_IO;
u8 scr1 = 0, ata66 = (hwif->channel) ? 0x01 : 0x02;
+ u8 new_mcr, old_mcr = 0;

/* Cache the channel's MISC. control registers' offset */
hwif->select_data = hwif->channel ? 0x54 : 0x50;
@@ -1234,6 +1142,41 @@ static void __devinit init_hwif_hpt366(i
hwif->rw_disk = &hpt3xxn_rw_disk;
}

+ /* Serialize access to this device if needed */
+ if (serialize && hwif->mate)
+ hwif->serialized = hwif->mate->serialized = 1;
+
+ /*
+ * Disable the "fast interrupt" prediction. Don't hold off
+ * on interrupts. (== 0x01 despite what the docs say)
+ */
+ pci_read_config_byte(dev, hwif->select_data + 1, &old_mcr);
+
+ if (info->revision >= 5) /* HPT372 and newer */
+ new_mcr = old_mcr & ~0x07;
+ else if (info->revision >= 3) { /* HPT370 and HPT370A */
+ new_mcr = old_mcr;
+ new_mcr &= ~0x02;
+
+#ifdef HPT_DELAY_INTERRUPT
+ new_mcr &= ~0x01;
+#else
+ new_mcr |= 0x01;
+#endif
+ } else /* HPT366 and HPT368 */
+ new_mcr = old_mcr & ~0x80;
+
+ if (new_mcr != old_mcr)
+ pci_write_config_byte(dev, hwif->select_data + 1, new_mcr);
+
+ if (!hwif->dma_base) {
+ hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
+ return;
+ }
+
+ hwif->ultra_mask = 0x7f;
+ hwif->mwdma_mask = 0x07;
+
/*
* The HPT37x uses the CBLID pins as outputs for MA15/MA16
* address lines to access an external EEPROM. To read valid
@@ -1268,54 +1211,30 @@ static void __devinit init_hwif_hpt366(i
} else
pci_read_config_byte (dev, 0x5a, &scr1);

- /* Serialize access to this device */
- if (serialize && hwif->mate)
- hwif->serialized = hwif->mate->serialized = 1;
+ if (!hwif->udma_four)
+ hwif->udma_four = (scr1 & ata66) ? 0 : 1;

- /*
- * Set up ioctl for power status.
- * NOTE: power affects both drives on each channel.
- */
- hwif->busproc = &hpt3xx_busproc;
-
- if (!hwif->dma_base) {
- hwif->drives[0].autotune = 1;
- hwif->drives[1].autotune = 1;
- return;
- }
+ hwif->ide_dma_check = &hpt366_config_drive_xfer_rate;

- hwif->ultra_mask = 0x7f;
- hwif->mwdma_mask = 0x07;
-
- if (!(hwif->udma_four))
- hwif->udma_four = ((scr1 & ata66) ? 0 : 1);
- hwif->ide_dma_check = &hpt366_config_drive_xfer_rate;
-
- if (info->revision >= 8) {
- hwif->ide_dma_test_irq = &hpt374_ide_dma_test_irq;
- hwif->ide_dma_end = &hpt374_ide_dma_end;
- } else if (info->revision >= 5) {
- hwif->ide_dma_test_irq = &hpt374_ide_dma_test_irq;
- hwif->ide_dma_end = &hpt374_ide_dma_end;
+ if (info->revision >= 5) {
+ hwif->ide_dma_test_irq = &hpt374_ide_dma_test_irq;
+ hwif->ide_dma_end = &hpt374_ide_dma_end;
} else if (info->revision >= 3) {
- hwif->dma_start = &hpt370_ide_dma_start;
- hwif->ide_dma_end = &hpt370_ide_dma_end;
- hwif->ide_dma_timeout = &hpt370_ide_dma_timeout;
- hwif->ide_dma_lostirq = &hpt370_ide_dma_lostirq;
- } else if (info->revision >= 2)
- hwif->ide_dma_lostirq = &hpt366_ide_dma_lostirq;
- else
- hwif->ide_dma_lostirq = &hpt366_ide_dma_lostirq;
+ hwif->dma_start = &hpt370_ide_dma_start;
+ hwif->ide_dma_end = &hpt370_ide_dma_end;
+ hwif->ide_dma_timeout = &hpt370_ide_dma_timeout;
+ hwif->ide_dma_lostirq = &hpt370_ide_dma_lostirq;
+ } else
+ hwif->ide_dma_lostirq = &hpt366_ide_dma_lostirq;

if (!noautodma)
hwif->autodma = 1;
- hwif->drives[0].autodma = hwif->autodma;
- hwif->drives[1].autodma = hwif->autodma;
+ hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma;
}

static void __devinit init_dma_hpt366(ide_hwif_t *hwif, unsigned long dmabase)
{
- struct pci_dev *dev = hwif->pci_dev;
+ struct pci_dev *dev = hwif->pci_dev;
struct hpt_info *info = ide_get_hwifdata(hwif);
u8 masterdma = 0, slavedma = 0;
u8 dma_new = 0, dma_old = 0;
@@ -1330,7 +1249,7 @@ static void __devinit init_dma_hpt366(id
return;
}

- dma_old = hwif->INB(dmabase+2);
+ dma_old = hwif->INB(dmabase + 2);

local_irq_save(flags);