590501cfe4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14805 a1c6a512-1295-4272-9138-f99709370657
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Will Robertson
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "cpu.h"
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#include "kernel.h"
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#include "thread.h"
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#include "system.h"
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#include "power.h"
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#include "panic.h"
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#include "pcf50606.h"
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#include "ata-target.h"
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#include "mmu-imx31.h"
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#include "backlight-target.h"
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#define ATA_RST (1 << 6)
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void ata_reset(void)
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{
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ATA_CONTROL &= ~ATA_RST;
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sleep(1);
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ATA_CONTROL |= ATA_RST;
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sleep(1);
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}
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/* This function is called before enabling the USB bus */
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void ata_enable(bool on)
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{
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(void)on;
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}
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bool ata_is_coldstart(void)
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{
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return 0;
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}
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unsigned long get_pll(bool serial) {
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unsigned long mfi, mfn, mfd, pdf, ref_clk;
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unsigned long reg = 0, ccmr;
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unsigned long long temp;
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unsigned int prcs;
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ccmr = CLKCTL_CCMR;
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prcs = (ccmr & 0x6) >> 1;
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if(prcs == 0x1) {
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ref_clk = 32768 * 1024;
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} else {
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ref_clk = 27000000;
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}
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if(serial) {
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reg = CLKCTL_SPCTL;
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} else {
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if((ccmr & 0x8) == 0)
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return ref_clk;
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if((ccmr & 0x80) != 0)
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return ref_clk;
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reg = CLKCTL_MPCTL;
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}
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pdf = (reg & (0x7 << 26)) >> 26;
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mfd = (reg & (0x3FF << 16)) >> 16;
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mfi = (reg & (0xF << 10)) >> 10;
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mfi = (mfi <= 5) ? 5 : mfi;
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mfn = (reg & 0x3FF);
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if(mfn < 0x200) {
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temp = (unsigned long long)2 *ref_clk * mfn;
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temp /= (mfd + 1);
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temp = (unsigned long long)2 *ref_clk * mfi + temp;
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temp /= (pdf + 1);
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} else {
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temp = (unsigned long long)2 *ref_clk * (0x400 - mfn);
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temp /= (mfd + 1);
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temp = (unsigned long long)2 *ref_clk * mfi - temp;
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temp /= (pdf + 1);
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}
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return (unsigned long)temp;
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}
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unsigned long get_ata_clock(void) {
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unsigned long pll, ret_val, hclk, max_pdf, ipg_pdf, mcu_pdf;
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max_pdf = (CLKCTL_PDR0 & (0x7 << 3)) >> 3;
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ipg_pdf = (CLKCTL_PDR0 & (0x3 << 6)) >> 6;
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mcu_pdf = (CLKCTL_PDR0 & 0x7);
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if((CLKCTL_PMCR0 & 0xC0000000 ) == 0) {
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pll = get_pll(true);
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} else {
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pll = get_pll(false);
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}
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hclk = pll/(max_pdf + 1);
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ret_val = hclk / (ipg_pdf + 1);
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return ret_val;
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}
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void ata_device_init(void)
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{
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ATA_CONTROL |= ATA_RST; /* Make sure we're not in reset mode */
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/* Setup the timing for PIO mode */
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int T = 1000 * 1000 * 1000 / get_ata_clock();
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TIME_OFF = 3;
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TIME_ON = 3;
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TIME_1 = (T + 70)/T;
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TIME_2W = (T + 290)/T;
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TIME_2R = (T + 290)/T;
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TIME_AX = (T + 50)/T;
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TIME_PIO_RDX = 1;
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TIME_4 = (T + 30)/T;
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TIME_9 = (T + 20)/T;
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}
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#if !defined(BOOTLOADER)
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void copy_read_sectors(unsigned char* buf, int wordcount)
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{
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(void)buf;
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(void)wordcount;
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}
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#endif
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