fa748db6ff
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19055 a1c6a512-1295-4272-9138-f99709370657
632 lines
18 KiB
C
632 lines
18 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) 2006 Daniel Ankers
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* Copyright © 2008 Rafaël Carré
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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/* Driver for the ARM PL180 SD/MMC controller inside AS3525 SoC */
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#include "config.h" /* for HAVE_MULTIVOLUME */
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#include "fat.h"
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#include "thread.h"
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#include "hotswap.h"
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#include "system.h"
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#include "cpu.h"
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#include <stdlib.h>
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#include "as3525.h"
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#include "pl180.h"
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#include "panic.h"
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#include "stdbool.h"
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#include "ata_idle_notify.h"
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#include "sd.h"
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#ifdef HAVE_HOTSWAP
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#include "disk.h"
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#endif
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/* command flags */
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#define MMC_NO_FLAGS (0<<0)
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#define MMC_RESP (1<<0)
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#define MMC_LONG_RESP (1<<1)
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#define MMC_ARG (1<<2)
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/* ARM PL180 registers */
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#define MMC_POWER(i) (*(volatile unsigned char *) (pl180_base[i]+0x00))
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#define MMC_CLOCK(i) (*(volatile unsigned long *) (pl180_base[i]+0x04))
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#define MMC_ARGUMENT(i) (*(volatile unsigned long *) (pl180_base[i]+0x08))
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#define MMC_COMMAND(i) (*(volatile unsigned long *) (pl180_base[i]+0x0C))
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#define MMC_RESPCMD(i) (*(volatile unsigned long *) (pl180_base[i]+0x10))
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#define MMC_RESP0(i) (*(volatile unsigned long *) (pl180_base[i]+0x14))
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#define MMC_RESP1(i) (*(volatile unsigned long *) (pl180_base[i]+0x18))
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#define MMC_RESP2(i) (*(volatile unsigned long *) (pl180_base[i]+0x1C))
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#define MMC_RESP3(i) (*(volatile unsigned long *) (pl180_base[i]+0x20))
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#define MMC_DATA_TIMER(i) (*(volatile unsigned long *) (pl180_base[i]+0x24))
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#define MMC_DATA_LENGTH(i) (*(volatile unsigned short*) (pl180_base[i]+0x28))
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#define MMC_DATA_CTRL(i) (*(volatile unsigned char *) (pl180_base[i]+0x2C))
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#define MMC_DATA_CNT(i) (*(volatile unsigned short*) (pl180_base[i]+0x30))
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#define MMC_STATUS(i) (*(volatile unsigned long *) (pl180_base[i]+0x34))
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#define MMC_CLEAR(i) (*(volatile unsigned long *) (pl180_base[i]+0x38))
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#define MMC_MASK0(i) (*(volatile unsigned long *) (pl180_base[i]+0x3C))
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#define MMC_MASK1(i) (*(volatile unsigned long *) (pl180_base[i]+0x40))
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#define MMC_SELECT(i) (*(volatile unsigned long *) (pl180_base[i]+0x44))
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#define MMC_FIFO_CNT(i) (*(volatile unsigned long *) (pl180_base[i]+0x48))
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#define MMC_FIFO(i) ((unsigned long *) (pl180_base[i]+0x80))
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/* volumes */
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#define NAND_AS3525 0
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#define SD_AS3525 1
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static const int pl180_base[NUM_VOLUMES] = {
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NAND_FLASH_BASE
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#ifdef HAVE_MULTIVOLUME
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, SD_MCI_BASE
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#endif
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};
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#define BLOCK_SIZE 512
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#define SECTOR_SIZE 512
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static tSDCardInfo card_info[NUM_VOLUMES];
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/* for compatibility */
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static long last_disk_activity = -1;
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#define MIN_YIELD_PERIOD 1000
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static long next_yield = 0;
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/* Shoot for around 75% usage */
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static long sd_stack [(DEFAULT_STACK_SIZE*2 + 0x1c0)/sizeof(long)];
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static const char sd_thread_name[] = "ata/sd";
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static struct mutex sd_mtx SHAREDBSS_ATTR;
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static struct event_queue sd_queue;
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static inline void mci_delay(void) { int i = 0xffff; while(i--) ; }
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static void mci_set_clock_divider(const int drive, int divider)
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{
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int clock = MMC_CLOCK(drive);
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if(divider > 1)
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{
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/* use divide logic */
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clock &= ~MCI_CLOCK_BYPASS;
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/* convert divider to MMC_CLOCK logic */
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divider = (divider/2) - 1;
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if(divider >= 256)
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divider = 255;
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}
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else
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{
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/* bypass dividing logic */
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clock |= MCI_CLOCK_BYPASS;
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divider = 0;
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}
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MMC_CLOCK(drive) = clock | divider;
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mci_delay();
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}
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static bool send_cmd(const int drive, const int cmd, const int arg,
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const int flags, int *response)
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{
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int val, status;
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while(MMC_STATUS(drive) & MCI_CMD_ACTIVE);
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if(MMC_COMMAND(drive) & MCI_COMMAND_ENABLE) /* clears existing command */
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{
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MMC_COMMAND(drive) = 0;
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mci_delay();
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}
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val = cmd | MCI_COMMAND_ENABLE;
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if(flags & MMC_RESP)
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{
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val |= MCI_COMMAND_RESPONSE;
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if(flags & MMC_LONG_RESP)
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val |= MCI_COMMAND_LONG_RESPONSE;
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}
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MMC_CLEAR(drive) = 0x7ff;
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MMC_ARGUMENT(drive) = (flags & MMC_ARG) ? arg : 0;
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MMC_COMMAND(drive) = val;
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while(MMC_STATUS(drive) & MCI_CMD_ACTIVE); /* wait for cmd completion */
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MMC_COMMAND(drive) = 0;
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MMC_ARGUMENT(drive) = ~0;
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status = MMC_STATUS(drive);
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MMC_CLEAR(drive) = 0x7ff;
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if(flags & MMC_RESP)
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{
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if(status & MCI_CMD_TIMEOUT)
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return false;
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else if(status & (MCI_CMD_CRC_FAIL /* FIXME? */ | MCI_CMD_RESP_END))
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{ /* resp received */
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if(flags & MMC_LONG_RESP)
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{
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/* store the response in little endian order for the words */
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response[0] = MMC_RESP3(drive);
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response[1] = MMC_RESP2(drive);
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response[2] = MMC_RESP1(drive);
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response[3] = MMC_RESP0(drive);
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}
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else
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response[0] = MMC_RESP0(drive);
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return true;
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}
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}
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else if(status & MCI_CMD_SENT)
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return true;
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return false;
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}
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static int sd_init_card(const int drive)
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{
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unsigned int c_size;
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unsigned long c_mult;
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int response;
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int max_tries = 100; /* max acmd41 attemps */
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bool sdhc;
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if(!send_cmd(drive, SD_GO_IDLE_STATE, 0, MMC_NO_FLAGS, NULL))
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return -1;
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mci_delay();
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sdhc = false;
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if(send_cmd(drive, SD_SEND_IF_COND, 0x1AA, MMC_RESP|MMC_ARG, &response))
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if((response & 0xFFF) == 0x1AA)
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sdhc = true;
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do {
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mci_delay();
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/* app_cmd */
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if( !send_cmd(drive, SD_APP_CMD, 0, MMC_RESP|MMC_ARG, &response) ||
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!(response & (1<<5)) )
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{
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return -2;
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}
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/* acmd41 */
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if(!send_cmd(drive, SD_APP_OP_COND, (sdhc ? 0x40FF8000 : (1<<23)),
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MMC_RESP|MMC_ARG, &card_info[drive].ocr))
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return -3;
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} while(!(card_info[drive].ocr & (1<<31)) && max_tries--);
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if(!max_tries)
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return -4;
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/* send CID */
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if(!send_cmd(drive, SD_ALL_SEND_CID, 0, MMC_RESP|MMC_LONG_RESP|MMC_ARG,
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card_info[drive].cid))
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return -5;
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/* send RCA */
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if(!send_cmd(drive, SD_SEND_RELATIVE_ADDR, 0, MMC_RESP|MMC_ARG,
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&card_info[drive].rca))
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return -6;
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/* send CSD */
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if(!send_cmd(drive, SD_SEND_CSD, card_info[drive].rca,
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MMC_RESP|MMC_LONG_RESP|MMC_ARG, card_info[drive].csd))
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return -7;
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/* These calculations come from the Sandisk SD card product manual */
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if( (card_info[drive].csd[3]>>30) == 0)
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{
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/* CSD version 1.0 */
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c_size = ((card_info[drive].csd[2] & 0x3ff) << 2) + (card_info[drive].csd[1]>>30) + 1;
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c_mult = 4 << ((card_info[drive].csd[1] >> 15) & 7);
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card_info[drive].max_read_bl_len = 1 << ((card_info[drive].csd[2] >> 16) & 15);
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card_info[drive].block_size = BLOCK_SIZE; /* Always use 512 byte blocks */
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card_info[drive].numblocks = c_size * c_mult * (card_info[drive].max_read_bl_len/512);
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card_info[drive].capacity = card_info[drive].numblocks * card_info[drive].block_size;
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}
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#ifdef HAVE_MULTIVOLUME
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else if( (card_info[drive].csd[3]>>30) == 1)
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{
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/* CSD version 2.0 */
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c_size = ((card_info[drive].csd[2] & 0x3f) << 16) + (card_info[drive].csd[1]>>16) + 1;
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card_info[drive].max_read_bl_len = 1 << ((card_info[drive].csd[2] >> 16) & 0xf);
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card_info[drive].block_size = BLOCK_SIZE; /* Always use 512 byte blocks */
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card_info[drive].numblocks = c_size << 10;
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card_info[drive].capacity = card_info[drive].numblocks * card_info[drive].block_size;
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}
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#endif
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if(!send_cmd(drive, SD_SELECT_CARD, card_info[drive].rca, MMC_ARG, NULL))
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return -9;
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if(!send_cmd(drive, SD_APP_CMD, card_info[drive].rca, MMC_ARG, NULL))
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return -10;
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if(!send_cmd(drive, SD_SET_BUS_WIDTH, card_info[drive].rca | 2, MMC_ARG, NULL))
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return -11;
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if(!send_cmd(drive, SD_SET_BLOCKLEN, card_info[drive].block_size, MMC_ARG,
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NULL))
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return -12;
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card_info[drive].initialized = 1;
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mci_set_clock_divider(drive, 1); /* full speed */
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return 0;
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}
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static void sd_thread(void) __attribute__((noreturn));
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static void sd_thread(void)
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{
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struct queue_event ev;
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bool idle_notified = false;
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while (1)
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{
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queue_wait_w_tmo(&sd_queue, &ev, HZ);
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switch ( ev.id )
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{
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#ifdef HAVE_HOTSWAP
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case SYS_HOTSWAP_INSERTED:
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case SYS_HOTSWAP_EXTRACTED:
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fat_lock(); /* lock-out FAT activity first -
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prevent deadlocking via disk_mount that
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would cause a reverse-order attempt with
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another thread */
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mutex_lock(&sd_mtx); /* lock-out card activity - direct calls
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into driver that bypass the fat cache */
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/* We now have exclusive control of fat cache and ata */
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disk_unmount(1); /* release "by force", ensure file
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descriptors aren't leaked and any busy
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ones are invalid if mounting */
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/* Force card init for new card, re-init for re-inserted one or
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* clear if the last attempt to init failed with an error. */
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card_info[1].initialized = 0;
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if (ev.id == SYS_HOTSWAP_INSERTED)
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disk_mount(1);
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queue_broadcast(SYS_FS_CHANGED, 0);
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/* Access is now safe */
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mutex_unlock(&sd_mtx);
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fat_unlock();
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break;
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#endif
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case SYS_TIMEOUT:
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if (TIME_BEFORE(current_tick, last_disk_activity+(3*HZ)))
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{
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idle_notified = false;
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}
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else
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{
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/* never let a timer wrap confuse us */
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next_yield = current_tick;
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if (!idle_notified)
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{
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call_storage_idle_notifys(false);
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idle_notified = true;
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}
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}
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break;
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#if 0
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case SYS_USB_CONNECTED:
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usb_acknowledge(SYS_USB_CONNECTED_ACK);
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/* Wait until the USB cable is extracted again */
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usb_wait_for_disconnect(&sd_queue);
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break;
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case SYS_USB_DISCONNECTED:
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usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
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break;
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#endif
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}
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}
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}
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static void init_pl180_controller(const int drive)
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{
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#ifdef BOOTLOADER
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MMC_COMMAND(drive) = MMC_DATA_CTRL(drive) = 0;
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MMC_CLEAR(drive) = 0x7ff;
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MMC_MASK0(drive) = MMC_MASK1(drive) = 0; /* disable all interrupts */
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MMC_POWER(drive) = MCI_POWER_UP|(10 /*voltage*/ << 2); /* use OF voltage */
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mci_delay();
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MMC_POWER(drive) |= MCI_POWER_ON;
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mci_delay();
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MMC_SELECT(drive) = 0;
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MMC_CLOCK(drive) = MCI_CLOCK_ENABLE;
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MMC_CLOCK(drive) &= ~MCI_CLOCK_POWERSAVE;
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#else /* controller already initialized by bootloader */
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/* set MCLK divider */
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mci_set_clock_divider(drive, 200);
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#endif /* BOOTLOADER */
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}
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int sd_init(void)
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{
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int ret;
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#ifdef BOOTLOADER /* No need to do twice the same thing */
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CGU_IDE = (1<<7) /* AHB interface enable */ |
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(1<<6) /* interface enable */ |
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(2<<2) /* clock didiver = 2+1 */ |
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1 /* clock source = PLLA */;
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CGU_PERI |= CGU_NAF_CLOCK_ENABLE;
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#ifdef HAVE_MULTIVOLUME
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CGU_PERI |= CGU_MCI_CLOCK_ENABLE;
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#endif
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CCU_IO &= ~8; /* bits 3:2 = 01, xpd is SD interface */
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CCU_IO |= 4;
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#endif
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init_pl180_controller(NAND_AS3525);
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ret = sd_init_card(NAND_AS3525);
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if(ret < 0)
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return ret;
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#ifdef HAVE_MULTIVOLUME
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init_pl180_controller(SD_AS3525);
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ret = sd_init_card(SD_AS3525);
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if(ret < 0)
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return ret;
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#endif
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queue_init(&sd_queue, true);
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create_thread(sd_thread, sd_stack, sizeof(sd_stack), 0,
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sd_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE) IF_COP(, CPU));
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return 0;
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}
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#ifdef STORAGE_GET_INFO
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void sd_get_info(IF_MV2(int drive,) struct storage_info *info)
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{
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#ifndef HAVE_MULTIVOLUME
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const int drive=0;
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#endif
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info->sector_size=card_info[drive].block_size;
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info->num_sectors=card_info[drive].numblocks;
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info->vendor="Rockbox";
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info->product = (drive == 0) ? "Internal Storage" : "SD Card Slot";
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info->revision="0.00";
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}
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#endif
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#ifdef HAVE_HOTSWAP
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bool sd_removable(IF_MV_NONVOID(int drive))
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{
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#ifndef HAVE_MULTIVOLUME
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const int drive=0;
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#endif
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return (drive==1);
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}
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bool sd_present(IF_MV_NONVOID(int drive))
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{
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#ifndef HAVE_MULTIVOLUME
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const int drive=0;
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#endif
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return (card_info[drive].initialized && card_info[drive].numblocks > 0);
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}
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#endif
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int sd_write_sectors(IF_MV2(int drive,) unsigned long start, int count, const void* buf)
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{
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(void)start;
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(void)count;
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(void)buf;
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return 0; /* TODO */
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}
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static bool sd_poll_status(const int drive, unsigned int trigger, long timeout)
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{
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long t = current_tick;
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while ((MMC_STATUS(drive) & trigger) == 0)
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{
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long time = current_tick;
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if (TIME_AFTER(time, next_yield))
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{
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long ty = current_tick;
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yield();
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timeout += current_tick - ty;
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next_yield = ty + MIN_YIELD_PERIOD;
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}
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if (TIME_AFTER(time, t + timeout))
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return false;
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}
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return true;
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}
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static int sd_wait_for_state(const int drive, unsigned int state)
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{
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unsigned int response = 0;
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unsigned int timeout = 0x80000;
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long t = current_tick;
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while (1)
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{
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long us;
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if(!send_cmd(drive, SD_SEND_STATUS, card_info[drive].rca,
|
|
MMC_RESP|MMC_ARG, &response))
|
|
return -1;
|
|
|
|
if (((response >> 9) & 0xf) == state)
|
|
return 0;
|
|
|
|
if(TIME_AFTER(current_tick, t + timeout))
|
|
return -1;
|
|
|
|
us = current_tick;
|
|
if (TIME_AFTER(us, next_yield))
|
|
{
|
|
yield();
|
|
timeout += current_tick - us;
|
|
next_yield = us + MIN_YIELD_PERIOD;
|
|
}
|
|
}
|
|
}
|
|
|
|
int sd_read_sectors(IF_MV2(int drive,) unsigned long start, int incount,
|
|
void* inbuf)
|
|
{
|
|
#ifndef HAVE_MULTIVOLUME
|
|
const int drive = 0;
|
|
#endif
|
|
int ret;
|
|
unsigned char *buf_end, *buf = inbuf;
|
|
int remaining = incount;
|
|
const unsigned long *fifo_base = MMC_FIFO(drive);
|
|
|
|
start += 20480; /* skip SanDisk OF */
|
|
|
|
/* TODO: Add DMA support. */
|
|
|
|
mutex_lock(&sd_mtx);
|
|
|
|
#ifdef HAVE_MULTIVOLUME
|
|
if (drive != 0 && !card_detect_target())
|
|
{
|
|
/* no external sd-card inserted */
|
|
ret = -88;
|
|
goto sd_read_error;
|
|
}
|
|
#endif
|
|
|
|
if (card_info[drive].initialized < 0)
|
|
{
|
|
ret = card_info[drive].initialized;
|
|
goto sd_read_error;
|
|
}
|
|
|
|
last_disk_activity = current_tick;
|
|
|
|
ret = sd_wait_for_state(drive, SD_TRAN);
|
|
if (ret < 0)
|
|
goto sd_read_error;
|
|
|
|
while(remaining)
|
|
{
|
|
/* 128 * 512 = 2^16, and doesn't fit in the 16 bits of DATA_LENGTH
|
|
* register, so we have to transfer maximum 127 sectors at a time. */
|
|
int transfer = (remaining >= 128) ? 127 : remaining; /* sectors */
|
|
|
|
if(card_info[drive].ocr & (1<<30) ) /* SDHC */
|
|
ret = send_cmd(drive, SD_READ_MULTIPLE_BLOCK, start, MMC_ARG, NULL);
|
|
else
|
|
ret = send_cmd(drive, SD_READ_MULTIPLE_BLOCK, start * BLOCK_SIZE,
|
|
MMC_ARG, NULL);
|
|
|
|
if (ret < 0)
|
|
goto sd_read_error;
|
|
|
|
/* TODO: Don't assume BLOCK_SIZE == SECTOR_SIZE */
|
|
|
|
|
|
MMC_DATA_TIMER(drive) = 0x1000000; /* FIXME: arbitrary */
|
|
MMC_DATA_LENGTH(drive) = transfer * card_info[drive].block_size;
|
|
MMC_DATA_CTRL(drive) = (1<<0) /* enable */ |
|
|
(1<<1) /* from card to controller */ |
|
|
(9<<4) /* 2^9 = 512 */ ;
|
|
|
|
buf_end = buf + transfer * card_info[drive].block_size;
|
|
|
|
while(buf < buf_end)
|
|
{
|
|
/* Wait for the FIFO to be half full */
|
|
if (!sd_poll_status(drive, ((1<<15)), 100))
|
|
{
|
|
ret = -42;
|
|
goto sd_read_error;
|
|
}
|
|
|
|
asm volatile(
|
|
"ldmia %2, {r0-r7} \n" /* load 8 * 4 bytes */
|
|
"stmia %1!, {r0-r7} \n" /* store 8 * 4 bytes */
|
|
:"=r"(buf) /* output */
|
|
:"r"(buf), "r"(fifo_base) /* input */
|
|
:"r0","r1","r2","r3","r4","r5","r6","r7","r8" /* clobbers */
|
|
);
|
|
}
|
|
|
|
remaining -= transfer;
|
|
start += transfer;
|
|
last_disk_activity = current_tick;
|
|
|
|
if(!send_cmd(drive, SD_STOP_TRANSMISSION, 0, MMC_NO_FLAGS, NULL))
|
|
{
|
|
ret = -666;
|
|
goto sd_read_error;
|
|
}
|
|
|
|
ret = sd_wait_for_state(drive, SD_TRAN);
|
|
if (ret < 0)
|
|
goto sd_read_error;
|
|
|
|
}
|
|
while (1)
|
|
{
|
|
mutex_unlock(&sd_mtx);
|
|
|
|
return ret;
|
|
|
|
sd_read_error:
|
|
card_info[drive].initialized = 0;
|
|
}
|
|
}
|
|
|
|
void sd_sleep(void)
|
|
{
|
|
}
|
|
|
|
void sd_spin(void)
|
|
{
|
|
}
|
|
|
|
void sd_spindown(int seconds)
|
|
{
|
|
(void)seconds;
|
|
}
|