Messages in this thread Patch in this message | | | Date | Wed, 22 Nov 2006 17:01:06 +0000 | From | Alan <> | Subject | [PATCH] pata_cs5520: resume support |
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The CS5520 doesn't need much help to resume but we do need to restore pcicfg which may have been reset to the BIOS default which is sometimes incorrect.
Signed-off-by: Alan Cox <alan@redhat.com>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cs5520.c linux-2.6.19-rc5-mm2/drivers/ata/pata_cs5520.c --- linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cs5520.c 2006-11-15 13:25:59.000000000 +0000 +++ linux-2.6.19-rc5-mm2/drivers/ata/pata_cs5520.c 2006-11-22 15:01:20.215376872 +0000 @@ -41,7 +41,7 @@ #include <linux/libata.h> #define DRV_NAME "pata_cs5520" -#define DRV_VERSION "0.6.2" +#define DRV_VERSION "0.6.3" struct pio_clocks { @@ -167,6 +167,8 @@ .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .bios_param = ata_std_bios_param, + .resume = ata_scsi_device_resume, + .suspend = ata_scsi_device_suspend, }; static struct ata_port_operations cs5520_port_ops = { @@ -296,6 +298,22 @@ dev_set_drvdata(dev, NULL); } +/** + * cs5520_reinit_one - device resume + * @pdev: PCI device + * + * Do any reconfiguration work needed by a resume from RAM. We need + * to restore DMA mode support on BIOSen which disabled it + */ + +static int cs5520_reinit_one(struct pci_dev *pdev) +{ + u8 pcicfg; + pci_read_config_byte(pdev, 0x60, &pcicfg); + if ((pcicfg & 0x40) == 0) + pci_write_config_byte(pdev, 0x60, pcicfg | 0x40); + return ata_pci_device_resume(pdev); +} /* For now keep DMA off. We can set it for all but A rev CS5510 once the core ATA code can handle it */ @@ -310,7 +328,9 @@ .name = DRV_NAME, .id_table = pata_cs5520, .probe = cs5520_init_one, - .remove = cs5520_remove_one + .remove = cs5520_remove_one, + .suspend = ata_pci_device_suspend, + .resume = cs5520_reinit_one, }; static int __init cs5520_init(void) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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