From c9d98ca9271d1e2045a1ca21215701f3fb2aaa37 Mon Sep 17 00:00:00 2001
From: Björn Stenberg <bjorn@haxx.se>
Date: Thu, 15 Aug 2002 12:42:37 +0000
Subject: Added delayed write for settings. Doesn't write until someone else
 accesses the disk.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1762 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/ata.c | 28 ++++++++++++++++++++++++++++
 firmware/drivers/ata.h | 10 ++++------
 2 files changed, 32 insertions(+), 6 deletions(-)

(limited to 'firmware/drivers')

diff --git a/firmware/drivers/ata.c b/firmware/drivers/ata.c
index ebe9602f01..0795eaf1f8 100644
--- a/firmware/drivers/ata.c
+++ b/firmware/drivers/ata.c
@@ -89,6 +89,9 @@ static char ata_stack[DEFAULT_STACK_SIZE];
 static char ata_thread_name[] = "ata";
 static struct event_queue ata_queue;
 static bool initialized = false;
+static bool delayed_write = false;
+static unsigned char delayed_sector[SECTOR_SIZE];
+static int delayed_sector_num;
 
 #ifdef USE_POWEROFF
 static int ata_power_on(void);
@@ -215,6 +218,10 @@ int ata_read_sectors(unsigned long start,
         ret = -1;
 
     mutex_unlock(&ata_mtx);
+
+    if ( delayed_write )
+        ata_flush();
+
     return ret;
 }
 
@@ -279,9 +286,30 @@ int ata_write_sectors(unsigned long start,
     i = wait_for_end_of_transfer();
 
     mutex_unlock(&ata_mtx);
+
+    if ( delayed_write )
+        ata_flush();
+
     return i;
 }
 
+extern void ata_delayed_write(unsigned long sector, void* buf)
+{
+    memcpy(delayed_sector, buf, SECTOR_SIZE);
+    delayed_sector_num = sector;
+    delayed_write = true;
+}
+
+extern void ata_flush(void)
+{
+    if ( delayed_write ) {
+        delayed_write = false;
+        ata_write_sectors(delayed_sector_num, 1, delayed_sector);
+    }
+}
+
+
+
 static int check_registers(void)
 {
     if ( ATA_STATUS & STATUS_BSY )
diff --git a/firmware/drivers/ata.h b/firmware/drivers/ata.h
index 4209fdcd1e..244ec63777 100644
--- a/firmware/drivers/ata.h
+++ b/firmware/drivers/ata.h
@@ -39,11 +39,9 @@ extern bool ata_disk_is_active(void);
 extern int ata_hard_reset(void);
 extern int ata_soft_reset(void);
 extern int ata_init(void);
-extern int ata_read_sectors(unsigned long start,
-                            int  count,
-                            void* buf);
-extern int ata_write_sectors(unsigned long start,
-                             int count,
-                             void* buf);
+extern int ata_read_sectors(unsigned long start, int count, void* buf);
+extern int ata_write_sectors(unsigned long start, int count, void* buf);
+extern void ata_delayed_write(unsigned long sector, void* buf);
+extern void ata_flush(void);
 
 #endif
-- 
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