Re: [PATCH 8/8] ide: add ->cable_detect method to ide_hwif_t

From: Sergei Shtylyov
Date: Sat Jan 12 2008 - 15:04:56 EST

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Hello.

Bartlomiej Zolnierkiewicz wrote:

* Add ->cable_detect method to ide_hwif_t.

* Call the new method in ide_init_port() if:
- the host supports UDMA modes > UDMA2 ('hwif->ultra_mask & 78')
- DMA initialization was successful (if hwif->dma_base is not set
ide_init_port() sets hwif->ultra_mask to zero)
- "idex=ata66" is not used ('hwif->cbl != ATA_CBL_PATA40_SHORT')

* Convert PCI host drivers to use ->cable_detect method.

While at it:

* Factor out cable detection to separate functions (if not already done).

* hpt366.c/it8213.c/slc90e66.c:
- don't check cable type if "idex=ata66" is used

* pdc202xx_new.c:
- add __devinit tag to pdcnew_cable_detect()

* pdc202xx_old.c:
- rename pdc202xx_old_cable_detect() to pdc2026x_old_cable_detect()
- add __devinit tag to pdc2026x_old_cable_detect()

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>

Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1343,6 +1343,11 @@ static void ide_init_port(ide_hwif_t *hw
/* call chipset specific routine for each enabled port */
if (d->init_hwif)
d->init_hwif(hwif);
+
+ if (hwif->cable_detect && (hwif->ultra_mask & 0x78)) {
+ if (hwif->cbl != ATA_CBL_PATA40_SHORT)
+ hwif->cbl = hwif->cable_detect(hwif);
+ }

Could be collapsed to a single *if* statement...

Index: b/drivers/ide/pci/alim15x3.c
===================================================================
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -666,13 +666,12 @@ static void __devinit init_hwif_common_a
hwif->set_dma_mode = &ali_set_dma_mode;
hwif->udma_filter = &ali_udma_filter;
+ hwif->cable_detect = ata66_ali15x3;

Why not give that function a "standard" name while at it?

static const struct ide_port_info atiixp_pci_info[] __devinitdata = {
Index: b/drivers/ide/pci/cmd64x.c
===================================================================
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -393,6 +393,8 @@ static void __devinit init_hwif_cmd64x(i
hwif->set_pio_mode = &cmd64x_set_pio_mode;
hwif->set_dma_mode = &cmd64x_set_dma_mode;
+ hwif->cable_detect = ata66_cmd64x;
+

Same question...

Index: b/drivers/ide/pci/hpt366.c
===================================================================
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -1279,12 +1279,55 @@ static unsigned int __devinit init_chips
return dev->irq;
}
+static u8 __devinit hpt3xx_cable_detect(ide_hwif_t *hwif)
+{
+ struct pci_dev *dev = to_pci_dev(hwif->dev);
+ struct hpt_info *info = pci_get_drvdata(dev);
+ u8 chip_type = info->chip_type;
+ u8 scr1 = 0, ata66 = hwif->channel ? 0x01 : 0x02;

The 'ata66' is pretty bad name for this variable (reversed sense), let's go with 'mask'...

+
+ /*
+ * The HPT37x uses the CBLID pins as outputs for MA15/MA16
+ * address lines to access an external EEPROM. To read valid
+ * cable detect state the pins must be enabled as inputs.
+ */
+ if (chip_type == HPT374 && (PCI_FUNC(dev->devfn) & 1)) {
+ /*
+ * HPT374 PCI function 1
+ * - set bit 15 of reg 0x52 to enable TCBLID as input
+ * - set bit 15 of reg 0x56 to enable FCBLID as input
+ */
+ u8 mcr_addr = hwif->select_data + 2;
+ u16 mcr;
+
+ pci_read_config_word(dev, mcr_addr, &mcr);
+ pci_write_config_word(dev, mcr_addr, (mcr | 0x8000));
+ /* now read cable id register */
+ pci_read_config_byte(dev, 0x5a, &scr1);
+ pci_write_config_word(dev, mcr_addr, mcr);
+ } else if (chip_type >= HPT370) {
+ /*
+ * HPT370/372 and 374 pcifn 0
+ * - clear bit 0 of reg 0x5b to enable P/SCBLID as inputs
+ */
+ u8 scr2 = 0;
+
+ pci_read_config_byte(dev, 0x5b, &scr2);
+ pci_write_config_byte(dev, 0x5b, (scr2 & ~1));
+ /* now read cable id register */
+ pci_read_config_byte(dev, 0x5a, &scr1);
+ pci_write_config_byte(dev, 0x5b, scr2);

Sigh, my pretty formatting is gone... at least don't leave double spaces and needless parens. :-)

+ } else
+ pci_read_config_byte(dev, 0x5a, &scr1);
+
+ return (scr1 & ata66) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+

[...]

--- a/drivers/ide/pci/it8213.c
+++ b/drivers/ide/pci/it8213.c
Index: b/drivers/ide/pci/it821x.c
===================================================================
--- a/drivers/ide/pci/it821x.c
+++ b/drivers/ide/pci/it821x.c
@@ -579,14 +579,13 @@ static void __devinit init_hwif_it821x(i
} else
hwif->host_flags |= IDE_HFLAG_NO_SET_MODE;
+ hwif->cable_detect = ata66_it821x;
+

I think the function is really worth renaming...

static void __devinit it8212_disable_raid(struct pci_dev *dev)
Index: b/drivers/ide/pci/jmicron.c
===================================================================
--- a/drivers/ide/pci/jmicron.c
+++ b/drivers/ide/pci/jmicron.c
@@ -111,11 +111,7 @@ static void __devinit init_hwif_jmicron(
hwif->set_pio_mode = &jmicron_set_pio_mode;
hwif->set_dma_mode = &jmicron_set_dma_mode;
- if (hwif->dma_base == 0)
- return;
-
- if (hwif->cbl != ATA_CBL_PATA40_SHORT)
- hwif->cbl = ata66_jmicron(hwif);
+ hwif->cable_detect = ata66_jmicron;

And this one too...

Index: b/drivers/ide/pci/pdc202xx_old.c
===================================================================
--- a/drivers/ide/pci/pdc202xx_old.c
+++ b/drivers/ide/pci/pdc202xx_old.c
@@ -140,7 +140,7 @@ static void pdc202xx_set_pio_mode(ide_dr
pdc202xx_set_mode(drive, XFER_PIO_0 + pio);
}
-static u8 pdc202xx_old_cable_detect (ide_hwif_t *hwif)
+static u8 __devinit pdc2026x_old_cable_detect(ide_hwif_t *hwif)

I suggest just pdc2026x_ without old_.

#define DECLARE_SCC_DEV(name_str) \
Index: b/drivers/ide/pci/serverworks.c
===================================================================
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -346,13 +346,8 @@ static void __devinit init_hwif_svwks (i
hwif->set_dma_mode = &svwks_set_dma_mode;
hwif->udma_filter = &svwks_udma_filter;
- if (!hwif->dma_base)
- return;
-
- if (dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
- if (hwif->cbl != ATA_CBL_PATA40_SHORT)
- hwif->cbl = ata66_svwks(hwif);
- }
+ if (dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
+ hwif->cable_detect = ata66_svwks;

Worth renaming...

Index: b/drivers/ide/pci/siimage.c
===================================================================
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -827,15 +827,14 @@ static void __devinit init_hwif_siimage(
} else
hwif->udma_filter = &sil_pata_udma_filter;
+ hwif->cable_detect = ata66_siimage;
+

That one too...

Index: b/drivers/ide/pci/sis5513.c
===================================================================
--- a/drivers/ide/pci/sis5513.c
+++ b/drivers/ide/pci/sis5513.c
@@ -565,13 +565,12 @@ static void __devinit init_hwif_sis5513 if (chipset_family >= ATA_133)
hwif->udma_filter = sis5513_ata133_udma_filter;
+ hwif->cable_detect = ata66_sis5513;
+

Another one...

MBR, Sergei
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Next message: Jarek Poplawski: "Re: [PATCH 1/7] driver-core : add class iteration api"
Previous message: Balaji Rao: "[PATCH] [RESEND] Assign IRQs to HPET Timers"
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