libata: Fix several inaccuracies in developer's guide

Commit 6bfff31e77cfa1b13490337e5a4dbaa3407e83ac (libata: kill probe_ent
and related helpers) killed ata_device_add() but didn't remove references
to it from the libata developer's guide.

Commits 9363c3825ea9ad76561eb48a395349dd29211ed6 (libata: rename SFF
functions) and 5682ed33aae05d10a25c95633ef9d9c062825888 (libata: rename
SFF port ops) renamed the taskfile access methods but didn't update the
developer's guide.  Commit c9f75b04ed5ed65a058d18a8a8dda50632a96de8
(libata: kill ata_noop_dev_select()) didn't update the developer's
guide as well.

The guide also refers to the long gone ata_pio_data_xfer_noirq(),
ata_pio_data_xfer(), and ata_mmio_data_xfer() -- replace those by
the modern ata_sff_data_xfer_noirq(), ata_sff_data_xfer(), and
ata_sff_data_xfer32().

Also, remove the reference to non-existant ata_port_stop()...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 16 insertions, 33 deletions

diff --git a/Documentation/DocBook/libata.tmpl b/Documentation/DocBook/libata.tmpl
index ba9975771503..ff3e5bec1c24 100644
--- a/Documentation/DocBook/libata.tmpl
+++ b/Documentation/DocBook/libata.tmpl
@@ -107,10 +107,6 @@ void (*dev_config) (struct ata_port *, struct ata_device *);
         issue of SET FEATURES - XFER MODE, and prior to operation.
         </para>
         <para>
-        Called by ata_device_add() after ata_dev_identify() determines
-        a device is present.
-        </para>
-        <para>
         This entry may be specified as NULL in ata_port_operations.
         </para>
 
@@ -154,8 +150,8 @@ unsigned int (*mode_filter) (struct ata_port *, struct ata_device *, unsigned in
 
         <sect2><title>Taskfile read/write</title>
         <programlisting>
-void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
-void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
+void (*sff_tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
+void (*sff_tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
         </programlisting>
 
         <para>
@@ -164,36 +160,35 @@ void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
         hardware registers / DMA buffers, to obtain the current set of
         taskfile register values.
         Most drivers for taskfile-based hardware (PIO or MMIO) use
-        ata_tf_load() and ata_tf_read() for these hooks.
+        ata_sff_tf_load() and ata_sff_tf_read() for these hooks.
         </para>
 
         </sect2>
 
         <sect2><title>PIO data read/write</title>
         <programlisting>
-void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
+void (*sff_data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
         </programlisting>
 
         <para>
 All bmdma-style drivers must implement this hook.  This is the low-level
 operation that actually copies the data bytes during a PIO data
 transfer.
-Typically the driver
-will choose one of ata_pio_data_xfer_noirq(), ata_pio_data_xfer(), or
-ata_mmio_data_xfer().
+Typically the driver will choose one of ata_sff_data_xfer_noirq(),
+ata_sff_data_xfer(), or ata_sff_data_xfer32().
         </para>
 
         </sect2>
 
         <sect2><title>ATA command execute</title>
         <programlisting>
-void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
+void (*sff_exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
         </programlisting>
 
         <para>
         causes an ATA command, previously loaded with
         ->tf_load(), to be initiated in hardware.
-        Most drivers for taskfile-based hardware use ata_exec_command()
+        Most drivers for taskfile-based hardware use ata_sff_exec_command()
         for this hook.
         </para>
 
@@ -218,8 +213,8 @@ command.
 
         <sect2><title>Read specific ATA shadow registers</title>
         <programlisting>
-u8   (*check_status)(struct ata_port *ap);
-u8   (*check_altstatus)(struct ata_port *ap);
+u8   (*sff_check_status)(struct ata_port *ap);
+u8   (*sff_check_altstatus)(struct ata_port *ap);
         </programlisting>
 
         <para>
@@ -227,20 +222,14 @@ u8   (*check_altstatus)(struct ata_port *ap);
         hardware.  On some hardware, reading the Status register has
         the side effect of clearing the interrupt condition.
         Most drivers for taskfile-based hardware use
-        ata_check_status() for this hook.
-        </para>
-        <para>
-        Note that because this is called from ata_device_add(), at
-        least a dummy function that clears device interrupts must be
-        provided for all drivers, even if the controller doesn't
-        actually have a taskfile status register.
+        ata_sff_check_status() for this hook.
         </para>
 
         </sect2>
 
         <sect2><title>Select ATA device on bus</title>
         <programlisting>
-void (*dev_select)(struct ata_port *ap, unsigned int device);
+void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
         </programlisting>
 
         <para>
@@ -251,9 +240,7 @@ void (*dev_select)(struct ata_port *ap, unsigned int device);
         </para>
         <para>
         Most drivers for taskfile-based hardware use
-        ata_std_dev_select() for this hook.  Controllers which do not
-        support second drives on a port (such as SATA contollers) will
-        use ata_noop_dev_select().
+        ata_sff_dev_select() for this hook.
         </para>
 
         </sect2>
@@ -441,13 +428,13 @@ void (*irq_clear) (struct ata_port *);
         to struct ata_host_set.
         </para>
         <para>
-        Most legacy IDE drivers use ata_interrupt() for the
+        Most legacy IDE drivers use ata_sff_interrupt() for the
         irq_handler hook, which scans all ports in the host_set,
         determines which queued command was active (if any), and calls
-        ata_host_intr(ap,qc).
+        ata_sff_host_intr(ap,qc).
         </para>
         <para>
-        Most legacy IDE drivers use ata_bmdma_irq_clear() for the
+        Most legacy IDE drivers use ata_sff_irq_clear() for the
         irq_clear() hook, which simply clears the interrupt and error
         flags in the DMA status register.
         </para>
@@ -496,10 +483,6 @@ void (*host_stop) (struct ata_host_set *host_set);
         data from port at this time.
         </para>
         <para>
-        Many drivers use ata_port_stop() as this hook, which frees the
-        PRD table.
-        </para>
-        <para>
         ->host_stop() is called after all ->port_stop() calls
 have completed.  The hook must finalize hardware shutdown, release DMA
 and other resources, etc.