From 590501cfe404b5463adecc70628e5bc7c8f142a2 Mon Sep 17 00:00:00 2001
From: Will Robertson <aliask@rockbox.org>
Date: Fri, 21 Sep 2007 15:51:53 +0000
Subject: Merge the Gigabeat S branch back into trunk. Fingers crossed nothing
 breaks.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14805 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/imx31/gigabeat-s/ata-imx31.c | 137 +++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 firmware/target/arm/imx31/gigabeat-s/ata-imx31.c

(limited to 'firmware/target/arm/imx31/gigabeat-s/ata-imx31.c')

diff --git a/firmware/target/arm/imx31/gigabeat-s/ata-imx31.c b/firmware/target/arm/imx31/gigabeat-s/ata-imx31.c
new file mode 100644
index 0000000000..58659c7d53
--- /dev/null
+++ b/firmware/target/arm/imx31/gigabeat-s/ata-imx31.c
@@ -0,0 +1,137 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Will Robertson
+ *
+ * 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 "mmu-imx31.h"
+#include "backlight-target.h"
+
+#define ATA_RST (1 << 6)
+
+void ata_reset(void)
+{
+    ATA_CONTROL &= ~ATA_RST;
+    sleep(1);
+    ATA_CONTROL |= ATA_RST;
+    sleep(1);
+}
+
+/* This function is called before enabling the USB bus */
+void ata_enable(bool on)
+{
+    (void)on;
+}
+
+bool ata_is_coldstart(void)
+{
+    return 0;
+}
+
+unsigned long get_pll(bool serial) {
+    unsigned long mfi, mfn, mfd, pdf, ref_clk;
+    unsigned long reg = 0, ccmr;
+    unsigned long long temp;
+    unsigned int prcs;
+
+    ccmr = CLKCTL_CCMR;
+    prcs = (ccmr & 0x6) >> 1;
+    if(prcs == 0x1) {
+        ref_clk = 32768 * 1024;
+    } else {
+        ref_clk = 27000000;
+    }
+
+    if(serial) {
+        reg = CLKCTL_SPCTL;
+    } else {
+        if((ccmr & 0x8) == 0)
+            return ref_clk;
+        if((ccmr & 0x80) != 0)
+            return ref_clk;
+        reg = CLKCTL_MPCTL;
+    }
+    pdf = (reg & (0x7 << 26)) >> 26;
+    mfd = (reg & (0x3FF << 16)) >> 16;
+    mfi = (reg & (0xF << 10)) >> 10;
+    mfi = (mfi <= 5) ? 5 : mfi;
+    mfn = (reg & 0x3FF);
+
+    if(mfn < 0x200) {
+        temp = (unsigned long long)2 *ref_clk * mfn;
+        temp /= (mfd + 1);
+        temp = (unsigned long long)2 *ref_clk * mfi + temp;
+        temp /= (pdf + 1);
+    } else {
+        temp = (unsigned long long)2 *ref_clk * (0x400 - mfn);
+        temp /= (mfd + 1);
+        temp = (unsigned long long)2 *ref_clk * mfi - temp;
+        temp /= (pdf + 1);
+
+    }
+    return (unsigned long)temp;
+}
+
+unsigned long get_ata_clock(void) {
+    unsigned long pll, ret_val, hclk, max_pdf, ipg_pdf, mcu_pdf;
+
+    max_pdf = (CLKCTL_PDR0 & (0x7 << 3)) >> 3;
+    ipg_pdf = (CLKCTL_PDR0 & (0x3 << 6)) >> 6;
+    mcu_pdf = (CLKCTL_PDR0 & 0x7);
+    if((CLKCTL_PMCR0 & 0xC0000000 ) == 0) {
+        pll = get_pll(true);
+    } else {
+        pll = get_pll(false);
+    }
+    hclk = pll/(max_pdf + 1);
+    ret_val = hclk / (ipg_pdf + 1);
+
+    return ret_val;
+}
+
+void ata_device_init(void)
+{
+    ATA_CONTROL |= ATA_RST; /* Make sure we're not in reset mode */
+
+    /* Setup the timing for PIO mode */
+    int T = 1000 * 1000 * 1000 / get_ata_clock();
+    TIME_OFF = 3;
+    TIME_ON = 3;
+
+    TIME_1 = (T + 70)/T;
+    TIME_2W = (T + 290)/T;
+    TIME_2R = (T + 290)/T;
+    TIME_AX = (T + 50)/T;
+    TIME_PIO_RDX = 1;
+    TIME_4 = (T + 30)/T;
+    TIME_9 = (T + 20)/T;
+}
+
+#if !defined(BOOTLOADER)
+void copy_read_sectors(unsigned char* buf, int wordcount)
+{
+    (void)buf;
+    (void)wordcount;
+}
+#endif
-- 
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