diff options
author | Alan <alan@lxorguk.ukuu.org.uk> | 2007-02-20 18:01:59 +0000 |
---|---|---|
committer | Jeff Garzik <jeff@garzik.org> | 2007-02-25 15:41:40 -0500 |
commit | 10305f0f8e642590c69674d08bd22accef610aed (patch) | |
tree | 81caa503dd092150229f63efbb2f59ad924a8bc7 /drivers/ata | |
parent | 098cdff3d40286f87062c17cd07e98ca7ad94184 (diff) | |
download | linux-10305f0f8e642590c69674d08bd22accef610aed.tar.bz2 |
Add id_to_dma_mode function for printing DMA modes
Also export dev_disable as this is needed by drivers doing slave decode
filtering, which will follow shortly
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r-- | drivers/ata/libata-core.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index d3b4e25074c1..9825a90d4169 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -824,6 +824,48 @@ static u64 ata_id_n_sectors(const u16 *id) } /** + * ata_id_to_dma_mode - Identify DMA mode from id block + * @dev: device to identify + * @mode: mode to assume if we cannot tell + * + * Set up the timing values for the device based upon the identify + * reported values for the DMA mode. This function is used by drivers + * which rely upon firmware configured modes, but wish to report the + * mode correctly when possible. + * + * In addition we emit similarly formatted messages to the default + * ata_dev_set_mode handler, in order to provide consistency of + * presentation. + */ + +void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) +{ + unsigned int mask; + u8 mode; + + /* Pack the DMA modes */ + mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; + if (dev->id[53] & 0x04) + mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; + + /* Select the mode in use */ + mode = ata_xfer_mask2mode(mask); + + if (mode != 0) { + ata_dev_printk(dev, KERN_INFO, "configured for %s\n", + ata_mode_string(mask)); + } else { + /* SWDMA perhaps ? */ + mode = unknown; + ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); + } + + /* Configure the device reporting */ + dev->xfer_mode = mode; + dev->xfer_shift = ata_xfer_mode2shift(mode); +} + +/** * ata_noop_dev_select - Select device 0/1 on ATA bus * @ap: ATA channel to manipulate * @device: ATA device (numbered from zero) to select @@ -6276,6 +6318,7 @@ EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); EXPORT_SYMBOL_GPL(ata_port_probe); +EXPORT_SYMBOL_GPL(ata_dev_disable); EXPORT_SYMBOL_GPL(sata_set_spd); EXPORT_SYMBOL_GPL(sata_phy_debounce); EXPORT_SYMBOL_GPL(sata_phy_resume); @@ -6310,6 +6353,7 @@ EXPORT_SYMBOL_GPL(ata_host_suspend); EXPORT_SYMBOL_GPL(ata_host_resume); EXPORT_SYMBOL_GPL(ata_id_string); EXPORT_SYMBOL_GPL(ata_id_c_string); +EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); EXPORT_SYMBOL_GPL(ata_device_blacklisted); EXPORT_SYMBOL_GPL(ata_scsi_simulate); |