I got bullied in IRC by linuxstb and markun...

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14909 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 131 insertions, 0 deletions

diff --git a/firmware/target/arm/tms320dm320/mrobe-500/ata-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/ata-mr500.c
new file mode 100644
index 0000000000..47a8c61a45
--- /dev/null
+++ b/firmware/target/arm/tms320dm320/mrobe-500/ata-mr500.c
@@ -0,0 +1,131 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Karl Kurbjun
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include "cpu.h"
+#include "kernel.h"
+#include "thread.h"
+#include "system.h"
+#include "power.h"
+#include "panic.h"
+#include "pcf50606.h"
+#include "ata-target.h"
+#include "backlight-target.h"
+
+/* ARESET on C7C68300 and RESET on ATA interface (Active Low) */
+#define ATA_RESET_ENABLE  (IO_GIO_BITCLR0 = 1 << 10)
+#define ATA_RESET_DISABLE (IO_GIO_BITSET0 = 1 << 10)
+
+/* ATA_EN on C7C68300 */
+#define USB_ATA_ENABLE    (IO_GIO_BITSET0 = 1 << 2)
+#define USB_ATA_DISABLE   (IO_GIO_BITCLR0 = 1 << 2)
+
+void ata_reset(void)
+{
+    ATA_RESET_ENABLE;
+    sleep(1); /* > 25us */
+    ATA_RESET_DISABLE;
+    sleep(1); /* > 2ms */
+}
+
+/* This function is called before enabling the USB bus */
+void ata_enable(bool on)
+{
+    if(on)
+        USB_ATA_DISABLE;
+    else
+        USB_ATA_ENABLE;
+}
+
+bool ata_is_coldstart(void)
+{
+    return true;
+}
+
+void ata_device_init(void)
+{
+    /* ATA reset */
+    ATA_RESET_DISABLE; /* Set the pin to disable an active low reset */
+    IO_GIO_DIR0&=~(1<<10);
+}
+
+#if 0
+void copy_read_sectors(unsigned char* buf, int wordcount)
+{
+    __buttonlight_trigger();
+
+    /* Unaligned transfer - slow copy */
+    if ( (unsigned long)buf & 1)
+    {   /* not 16-bit aligned, copy byte by byte */
+        unsigned short tmp = 0;
+        unsigned char* bufend = buf + wordcount*2;
+        do
+        {
+            tmp = ATA_DATA;
+            *buf++ = tmp & 0xff; /* I assume big endian */
+            *buf++ = tmp >> 8;   /*  and don't use the SWAB16 macro */
+        } while (buf < bufend); /* tail loop is faster */
+        return;
+    }
+    /* This should never happen, but worth watching for */
+    if(wordcount > (1 << 18))
+        panicf("atd-meg-fx.c: copy_read_sectors: too many sectors per read!");
+
+//#define GIGABEAT_DEBUG_ATA
+#ifdef GIGABEAT_DEBUG_ATA
+        static int line = 0;
+        static char str[256];
+        snprintf(str, sizeof(str), "ODD DMA to %08x, %d", buf, wordcount);
+        lcd_puts(10, line, str);
+        line = (line+1) % 32;
+        lcd_update();
+#endif
+    /* Reset the channel */
+    DMASKTRIG0 |= 4;
+    /* Wait for DMA controller to be ready */
+    while(DMASKTRIG0 & 0x2)
+        ;
+    while(DSTAT0 & (1 << 20))
+        ;
+    /* Source is ATA_DATA, on AHB Bus, Fixed */
+    DISRC0 = (int) 0x18000000;
+    DISRCC0 = 0x1;
+    /* Dest mapped to physical address, on AHB bus, increment */
+    DIDST0 = (int) buf;
+        if(DIDST0 < 0x30000000)
+                DIDST0 += 0x30000000;
+    DIDSTC0 = 0;
+
+    /* DACK/DREQ Sync to AHB, Whole service, No reload, 16-bit transfers */
+    DCON0 = ((1 << 30) | (1<<27) | (1<<22) | (1<<20)) | wordcount;
+
+    /* Activate the channel */
+    DMASKTRIG0 = 0x2;
+
+    invalidate_dcache_range((void *)buf, wordcount*2);
+
+    /* Start DMA */
+    DMASKTRIG0 |= 0x1;
+
+    /* Wait for transfer to complete */
+    while((DSTAT0 & 0x000fffff))
+        priority_yield();
+    /* Dump cache for the buffer  */
+}
+#endif