/**
* xgene_ahci_read_id - Read ID data from the specified device
* @dev: device
* @tf: proposed taskfile
* @id: data buffer
*
* This custom read ID function is required due to the fact that the HW
* does not support DEVSLP.
*/
static unsigned int xgene_ahci_read_id(struct ata_device *dev,
struct ata_taskfile *tf, u16 *id)
{
u32 err_mask;
err_mask = ata_do_dev_read_id(dev, tf, id);
if (err_mask)
return err_mask;
/*
* Mask reserved area. Word78 spec of Link Power Management
* bit15-8: reserved
* bit7: NCQ autosence
* bit6: Software settings preservation supported
* bit5: reserved
* bit4: In-order sata delivery supported
* bit3: DIPM requests supported
* bit2: DMA Setup FIS Auto-Activate optimization supported
* bit1: DMA Setup FIX non-Zero buffer offsets supported
* bit0: Reserved
*
* Clear reserved bit 8 (DEVSLP bit) as we don't support DEVSLP
*/
id[ATA_ID_FEATURE_SUPP] &= ~(1 << 8);
return 0;
}
static unsigned int netcell_read_id(struct ata_device *adev,
struct ata_taskfile *tf, u16 *id)
{
unsigned int err_mask = ata_do_dev_read_id(adev, tf, id);
/* */
if (err_mask == 0)
id[ATA_ID_CSF_DEFAULT] |= 0x4000;
return err_mask;
}
static unsigned int netcell_read_id(struct ata_device *adev,
struct ata_taskfile *tf, u16 *id)
{
unsigned int err_mask = ata_do_dev_read_id(adev, tf, id);
/* Firmware forgets to mark words 85-87 valid */
if (err_mask == 0)
id[ATA_ID_CSF_DEFAULT] |= 0x4000;
return err_mask;
}
static unsigned int ceva_ahci_read_id(struct ata_device *dev,
struct ata_taskfile *tf, u16 *id)
{
u32 err_mask;
err_mask = ata_do_dev_read_id(dev, tf, id);
if (err_mask)
return err_mask;
/*
* Since CEVA controller does not support device sleep feature, we
* need to clear DEVSLP (bit 8) in word78 of the IDENTIFY DEVICE data.
*/
id[ATA_ID_FEATURE_SUPP] &= cpu_to_le16(~(1 << 8));
return 0;
}
/**
* xgene_ahci_read_id - Read ID data from the specified device
* @dev: device
* @tf: proposed taskfile
* @id: data buffer
*
* This custom read ID function is required due to the fact that the HW
* does not support DEVSLP and the controller state machine may get stuck
* after processing the ID query command.
*/
static unsigned int xgene_ahci_read_id(struct ata_device *dev,
struct ata_taskfile *tf, u16 *id)
{
u32 err_mask;
void __iomem *port_mmio = ahci_port_base(dev->link->ap);
err_mask = ata_do_dev_read_id(dev, tf, id);
if (err_mask)
return err_mask;
/*
* Mask reserved area. Word78 spec of Link Power Management
* bit15-8: reserved
* bit7: NCQ autosence
* bit6: Software settings preservation supported
* bit5: reserved
* bit4: In-order sata delivery supported
* bit3: DIPM requests supported
* bit2: DMA Setup FIS Auto-Activate optimization supported
* bit1: DMA Setup FIX non-Zero buffer offsets supported
* bit0: Reserved
*
* Clear reserved bit 8 (DEVSLP bit) as we don't support DEVSLP
*/
id[ATA_ID_FEATURE_SUPP] &= ~(1 << 8);
/*
* Due to HW errata, restart the port if no other command active.
* Otherwise the controller may get stuck.
*/
if (!readl(port_mmio + PORT_CMD_ISSUE)) {
writel(PORT_CMD_FIS_RX, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* Force a barrier */
writel(PORT_CMD_FIS_RX | PORT_CMD_START, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* Force a barrier */
}
return 0;
}