Merge libata upstream (which includes C/H/S support) include irq-pio branch.

Merge branch 'upstream'

1 files changed, 18 insertions, 4 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 6fec2f6f2d59..65cd7e5b2f18 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -132,6 +132,7 @@ enum {
         ATA_CMD_PACKET          = 0xA0,
         ATA_CMD_VERIFY          = 0x40,
         ATA_CMD_VERIFY_EXT      = 0x42,
+        ATA_CMD_INIT_DEV_PARAMS = 0x91,
 
         /* SETFEATURES stuff */
         SETFEATURES_XFER        = 0x03,
@@ -146,14 +147,14 @@ enum {
         XFER_MW_DMA_2           = 0x22,
         XFER_MW_DMA_1           = 0x21,
         XFER_MW_DMA_0           = 0x20,
+        XFER_SW_DMA_2           = 0x12,
+        XFER_SW_DMA_1           = 0x11,
+        XFER_SW_DMA_0           = 0x10,
         XFER_PIO_4              = 0x0C,
         XFER_PIO_3              = 0x0B,
         XFER_PIO_2              = 0x0A,
         XFER_PIO_1              = 0x09,
         XFER_PIO_0              = 0x08,
-        XFER_SW_DMA_2           = 0x12,
-        XFER_SW_DMA_1           = 0x11,
-        XFER_SW_DMA_0           = 0x10,
         XFER_PIO_SLOW           = 0x00,
 
         /* ATAPI stuff */
@@ -181,7 +182,8 @@ enum {
         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
-        ATA_TFLAG_POLLING       = (1 << 4), /* set nIEN to 1 and use polling */
+        ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
+        ATA_TFLAG_POLLING       = (1 << 5), /* set nIEN to 1 and use polling */
 };
 
 enum ata_tf_protocols {
@@ -253,6 +255,18 @@ struct ata_taskfile {
 
 #define ata_id_cdb_intr(id)     (((id)[0] & 0x60) == 0x20)
 
+static inline int ata_id_current_chs_valid(u16 *id)
+{
+        /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command 
+           has not been issued to the device then the values of 
+           id[54] to id[56] are vendor specific. */
+        return (id[53] & 0x01) && /* Current translation valid */
+                id[54] &&  /* cylinders in current translation */
+                id[55] &&  /* heads in current translation */
+                id[55] <= 16 &&
+                id[56];    /* sectors in current translation */
+}
+
 static inline int atapi_cdb_len(u16 *dev_id)
 {
         u16 tmp = dev_id[0] & 0x3;