From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bartlomiej Zolnierkiewicz Subject: [PATCH][pata] ide: cable detection fixes Date: Sun, 11 Feb 2007 23:24:21 +0100 Message-ID: <200702112324.21704.bzolnier@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from ug-out-1314.google.com ([66.249.92.169]:2629 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932577AbXBKWSw (ORCPT ); Sun, 11 Feb 2007 17:18:52 -0500 Received: by ug-out-1314.google.com with SMTP id 44so422500uga for ; Sun, 11 Feb 2007 14:18:51 -0800 (PST) Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Cc: Tejun Heo [PATCH] ide: cable detection fixes Tejun's recent eighty_ninty_three() fix has inspired me to do more thorough review of the cable detection code... * print user-friendly warning about limiting the maximum transfer speed to UDMA33 (and the reason behind it) when 80-wire cable is not detected, also while at it cleanup eighty_ninty_three() a bit * use eighty_ninty_three() in ide_ata66_check(), this actually fixes 3 bugs: - bit 13 (word 93 validity check) == 1 and bit 12 (80-wire cable test) == 0 configuration was incorrectly treated as a 80-wire cable present [ for CONFIG_IDEDMA_IVB=n ] - CONFIG_IDEDMA_IVB=y/n cases were interchanged - check for SATA devices were missing * remove private cable warnings from pdc_202xx{old,new} drivers now that core code provides this functionality (plus, in pdc202xx_new case the test could give false warnings for ATAPI devices because pdc202xx_new driver doesn't even support ATAPI DMA) Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-iops.c | 51 +++++++++++++++++++++-------------------- drivers/ide/ide-lib.c | 11 +++++++- drivers/ide/pci/pdc202xx_new.c | 16 ------------ drivers/ide/pci/pdc202xx_old.c | 20 ---------------- include/linux/ide.h | 1 5 files changed, 38 insertions(+), 61 deletions(-) Index: b/drivers/ide/ide-iops.c =================================================================== --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -571,21 +571,34 @@ EXPORT_SYMBOL(ide_wait_stat); */ u8 eighty_ninty_three (ide_drive_t *drive) { - if(HWIF(drive)->udma_four == 0) - return 0; + ide_hwif_t *hwif = drive->hwif; + struct hd_driveid *id = drive->id; + + if (hwif->udma_four == 0) + goto no_80w; /* Check for SATA but only if we are ATA5 or higher */ - if (drive->id->hw_config == 0 && (drive->id->major_rev_num & 0x7FE0)) + if (id->hw_config == 0 && (id->major_rev_num & 0x7FE0)) return 1; - if (!(drive->id->hw_config & 0x6000)) - return 0; + #ifndef CONFIG_IDEDMA_IVB - if(!(drive->id->hw_config & 0x4000)) - return 0; -#endif /* CONFIG_IDEDMA_IVB */ - if (!(drive->id->hw_config & 0x2000)) + if ((id->hw_config & 0x6000) == 0x6000) +#else + if (id->hw_config & 0x2000) +#endif + return 1; + +no_80w: + if (drive->udma33_warned == 1) return 0; - return 1; + + printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " + "limiting max speed to UDMA33\n", + drive->name, hwif->udma_four ? "drive" : "host"); + + drive->udma33_warned = 1; + + return 0; } int ide_ata66_check (ide_drive_t *drive, ide_task_t *args) @@ -593,23 +606,13 @@ int ide_ata66_check (ide_drive_t *drive, if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) && (args->tfRegister[IDE_SECTOR_OFFSET] > XFER_UDMA_2) && (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER)) { -#ifndef CONFIG_IDEDMA_IVB - if ((drive->id->hw_config & 0x6000) == 0) { -#else /* !CONFIG_IDEDMA_IVB */ - if (((drive->id->hw_config & 0x2000) == 0) || - ((drive->id->hw_config & 0x4000) == 0)) { -#endif /* CONFIG_IDEDMA_IVB */ - printk("%s: Speed warnings UDMA 3/4/5 is not " - "functional.\n", drive->name); - return 1; - } - if (!HWIF(drive)->udma_four) { - printk("%s: Speed warnings UDMA 3/4/5 is not " - "functional.\n", - HWIF(drive)->name); + if (eighty_ninty_three(drive) == 0) { + printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot " + "be set\n", drive->name); return 1; } } + return 0; } Index: b/drivers/ide/ide-lib.c =================================================================== --- a/drivers/ide/ide-lib.c +++ b/drivers/ide/ide-lib.c @@ -88,8 +88,15 @@ u8 ide_rate_filter(ide_drive_t *drive, u if (hwif->udma_filter) mask = hwif->udma_filter(drive); - if ((mask & 0x78) && (eighty_ninty_three(drive) == 0)) - mask &= 0x07; + /* + * TODO: speed > XFER_UDMA_2 extra check is needed to avoid false + * cable warning from eighty_ninty_three(), moving ide_rate_filter() + * calls from ->speedproc to core code will make this hack go away + */ + if (speed > XFER_UDMA_2) { + if ((mask & 0x78) && (eighty_ninty_three(drive) == 0)) + mask &= 0x07; + } if (mask) mode = fls(mask) - 1 + XFER_UDMA_0; Index: b/drivers/ide/pci/pdc202xx_new.c =================================================================== --- a/drivers/ide/pci/pdc202xx_new.c +++ b/drivers/ide/pci/pdc202xx_new.c @@ -37,8 +37,6 @@ #include #endif -#define PDC202_DEBUG_CABLE 0 - #undef DEBUG #ifdef DEBUG @@ -234,17 +232,8 @@ static int config_chipset_for_dma(ide_dr { struct hd_driveid *id = drive->id; ide_hwif_t *hwif = HWIF(drive); - u8 ultra_66 = (id->dma_ultra & 0x0078) ? 1 : 0; - u8 cable = pdcnew_cable_detect(hwif); u8 speed; - if (ultra_66 && cable) { - printk(KERN_WARNING "Warning: %s channel " - "requires an 80-pin cable for operation.\n", - hwif->channel ? "Secondary" : "Primary"); - printk(KERN_WARNING "%s reduced to Ultra33 mode.\n", drive->name); - } - if (drive->media != ide_disk) return 0; @@ -548,11 +537,6 @@ static void __devinit init_hwif_pdc202ne if (!noautodma) hwif->autodma = 1; hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma; - -#if PDC202_DEBUG_CABLE - printk(KERN_DEBUG "%s: %s-pin cable\n", - hwif->name, hwif->udma_four ? "80" : "40"); -#endif /* PDC202_DEBUG_CABLE */ } static int __devinit init_setup_pdcnew(struct pci_dev *dev, ide_pci_device_t *d) Index: b/drivers/ide/pci/pdc202xx_old.c =================================================================== --- a/drivers/ide/pci/pdc202xx_old.c +++ b/drivers/ide/pci/pdc202xx_old.c @@ -46,7 +46,6 @@ #include #include -#define PDC202_DEBUG_CABLE 0 #define PDC202XX_DEBUG_DRIVE_INFO 0 static const char *pdc_quirk_drives[] = { @@ -238,20 +237,7 @@ static int config_chipset_for_dma (ide_d u32 drive_conf = 0; u8 drive_pci = 0x60 + (drive->dn << 2); u8 test1 = 0, test2 = 0, speed = -1; - u8 AP = 0, cable = 0; - - u8 ultra_66 = ((id->dma_ultra & 0x0010) || - (id->dma_ultra & 0x0008)) ? 1 : 0; - - if (dev->device != PCI_DEVICE_ID_PROMISE_20246) - cable = pdc202xx_old_cable_detect(hwif); - else - ultra_66 = 0; - - if (ultra_66 && cable) { - printk(KERN_WARNING "Warning: %s channel requires an 80-pin cable for operation.\n", hwif->channel ? "Secondary":"Primary"); - printk(KERN_WARNING "%s reduced to Ultra33 mode.\n", drive->name); - } + u8 AP = 0; if (dev->device != PCI_DEVICE_ID_PROMISE_20246) pdc_old_disable_66MHz_clock(drive->hwif); @@ -477,10 +463,6 @@ static void __devinit init_hwif_pdc202xx if (!noautodma) hwif->autodma = 1; hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma; -#if PDC202_DEBUG_CABLE - printk(KERN_DEBUG "%s: %s-pin cable\n", - hwif->name, hwif->udma_four ? "80" : "40"); -#endif /* PDC202_DEBUG_CABLE */ } static void __devinit init_dma_pdc202xx(ide_hwif_t *hwif, unsigned long dmabase) Index: b/include/linux/ide.h =================================================================== --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -605,6 +605,7 @@ typedef struct ide_drive_s { unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */ unsigned sleeping : 1; /* 1=sleeping & sleep field valid */ unsigned post_reset : 1; + unsigned udma33_warned : 1; u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */ u8 quirk_list; /* considered quirky, set for a specific host */