From 5cf79723ecb9a22de432d169ce65eb19aa651e8a Mon Sep 17 00:00:00 2001 From: Rafaël Carré Date: Tue, 3 Jan 2012 04:39:56 +0000 Subject: move PP specific files to pp/ git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31533 a1c6a512-1295-4272-9138-f99709370657 --- firmware/target/arm/pp/ata-pp5020.c | 248 ++++++++++++++++++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100644 firmware/target/arm/pp/ata-pp5020.c (limited to 'firmware/target/arm/pp/ata-pp5020.c') diff --git a/firmware/target/arm/pp/ata-pp5020.c b/firmware/target/arm/pp/ata-pp5020.c new file mode 100644 index 0000000000..50a38cb23d --- /dev/null +++ b/firmware/target/arm/pp/ata-pp5020.c @@ -0,0 +1,248 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2006 by Barry Wardell + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* ATA stuff was taken from the iPod code */ + +#include +#include "system.h" +#include "ata-driver.h" + +void ata_reset() +{ + +} + +void ata_enable(bool on) +{ + /* TODO: Implement ata_enable() */ + (void)on; +} + +bool ata_is_coldstart() +{ + return false; + /* TODO: Implement coldstart variable */ +} + +void ata_device_init() +{ +#ifdef SAMSUNG_YH920 + CPU_INT_DIS = (1< 65MHz */ +#else + IDE0_CFG &=~(0x10000000); /* cpu < 65MHz */ +#endif +#endif + + IDE0_PRI_TIMING0 = 0x10; + IDE0_PRI_TIMING1 = 0x80002150; +} + +/* These are PIO timings for 80 Mhz. At 24 Mhz, + the first value is 0 but the rest are the same. + They go in IDE0_PRI_TIMING0. + + Rockbox used 0x10, and test_disk shows that leads to faster PIO. + If 0x10 is incorrect, these timings may be needed with some devices. +static const unsigned long pio80mhz[] = { + 0xC293, 0x43A2, 0x11A1, 0x7232, 0x3131 +}; +*/ + +#ifdef HAVE_ATA_DMA +/* Timings for multi-word and ultra DMA modes. + These go in IDE0_PRI_TIMING1 + */ +static const unsigned long tm_mwdma[] = { + 0xF9F92, 0x56562, 0x45451 +}; + +static const unsigned long tm_udma[] = { + 0x800037C1, 0x80003491, 0x80003371, +#if ATA_MAX_UDMA > 2 + 0x80003271, 0x80003071 +#endif +}; + +#if ATA_MAX_UDMA > 2 +static bool dma_boosted = false; +static bool dma_needs_boost; +#endif + +/* This function sets up registers for 80 Mhz. + Ultra DMA mode 2 works at 30 Mhz. + */ +void ata_dma_set_mode(unsigned char mode) { + int modeidx; + + (*(volatile unsigned long *)(0x600060C4)) = 0xC0000000; /* 80 Mhz */ +#if !defined(IPOD_NANO) + IDE0_CFG &= ~0x10000000; +#endif + + modeidx = mode & 7; + mode &= 0xF8; + if (mode == 0x40 && modeidx <= ATA_MAX_UDMA) { + IDE0_PRI_TIMING1 = tm_udma[modeidx]; +#if ATA_MAX_UDMA > 2 + if (modeidx > 2) + dma_needs_boost = true; + else + dma_needs_boost = false; +#endif + } else if (mode == 0x20 && modeidx <= ATA_MAX_MWDMA) + IDE0_PRI_TIMING1 = tm_mwdma[modeidx]; + +#if !defined(IPOD_NANO) + IDE0_CFG |= 0x20000000; /* >= 50 Mhz */ +#endif +} + +#define IDE_CFG_INTRQ 8 +#define IDE_DMA_CONTROL_READ 8 + +/* This waits for an ATA interrupt using polling. + In ATA_CONTROL, CONTROL_nIEN must be cleared. + */ +STATICIRAM ICODE_ATTR int ata_wait_intrq(void) +{ + long timeout = current_tick + HZ*10; + + do + { + if (IDE0_CFG & IDE_CFG_INTRQ) + return 1; + ata_keep_active(); + yield(); + } while (TIME_BEFORE(current_tick, timeout)); + + return 0; /* timeout */ +} + +/* This function checks if parameters are appropriate for DMA, + and if they are, it sets up for DMA. + + If return value is false, caller may use PIO for this transfer. + + If return value is true, caller must issue a DMA ATA command + and then call ata_dma_finish(). + */ +bool ata_dma_setup(void *addr, unsigned long bytes, bool write) { + /* Require cacheline alignment for reads to prevent interference. */ + if (!write && ((unsigned long)addr & 15)) + return false; + + /* Writes only need to be word-aligned, but by default DMA + * is not used for writing as it appears to be slower. + */ +#ifdef ATA_DMA_WRITES + if (write && ((unsigned long)addr & 3)) + return false; +#else + if (write) + return false; +#endif + +#if ATA_MAX_UDMA > 2 + if (dma_needs_boost && !dma_boosted) { + cpu_boost(true); + dma_boosted = true; + } +#endif + + if (write) { + /* If unflushed, old data may be written to disk */ + commit_dcache(); + } + else { + /* Invalidate cache because new data may be present in RAM */ + commit_discard_dcache(); + } + + /* Clear pending interrupts so ata_dma_finish() can wait for an + interrupt from this transfer + */ + IDE0_CFG |= IDE_CFG_INTRQ; + + IDE_DMA_CONTROL |= 2; + IDE_DMA_LENGTH = bytes - 4; + +#if !defined(BOOTLOADER) || defined (HAVE_BOOTLOADER_USB_MODE) + if ((unsigned long)addr < DRAM_START) + /* Rockbox remaps DRAM to start at 0 */ + IDE_DMA_ADDR = (unsigned long)addr + DRAM_START; + else +#endif + IDE_DMA_ADDR = (unsigned long)addr; + + if (write) + IDE_DMA_CONTROL &= ~IDE_DMA_CONTROL_READ; + else + IDE_DMA_CONTROL |= IDE_DMA_CONTROL_READ; + + IDE0_CFG |= 0x8000; + + return true; +} + +/* This function waits for a DMA transfer to end. + It must be called to finish what ata_dma_setup started. + + Return value is true if DMA completed before the timeout, and false + if a timeout happened. + */ +bool ata_dma_finish(void) { + bool res; + + /* It may be okay to put this at the end of setup */ + IDE_DMA_CONTROL |= 1; + + /* Wait for end of transfer. + Reading standard ATA status while DMA is in progress causes + failures and hangs. Because of that, another wait is used. + */ + res = ata_wait_intrq(); + + IDE0_CFG &= ~0x8000; + IDE_DMA_CONTROL &= ~0x80000001; + +#if ATA_MAX_UDMA > 2 + if (dma_boosted) { + cpu_boost(false); + dma_boosted = false; + } +#endif + + return res; +} + +#endif /* HAVE_ATA_DMA */ -- cgit v1.2.3