0e2286f226
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27788 a1c6a512-1295-4272-9138-f99709370657
830 lines
19 KiB
C
830 lines
19 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 (C) 2009 Rob Purchase
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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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#include "sd.h"
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#include "system.h"
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#include <string.h>
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#include "gcc_extensions.h"
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#include "sdmmc.h"
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#include "storage.h"
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#include "led.h"
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#include "thread.h"
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#include "disk.h"
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#include "fat.h"
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#include "ata_idle_notify.h"
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#include "usb.h"
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#if defined(HAVE_INTERNAL_SD) && defined(HAVE_HOTSWAP)
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#define CARD_NUM_INTERNAL 0
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#define CARD_NUM_SLOT 1
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#elif !defined(HAVE_INTERNAL_SD) && defined(HAVE_HOTSWAP)
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#define CARD_NUM_SLOT 0
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#endif
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#define EC_OK 0
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#define EC_FAILED 1
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#define EC_NOCARD 2
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#define EC_WAIT_STATE_FAILED 3
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#define EC_POWER_UP 4
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#define EC_FIFO_WR_EMPTY 5
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#define EC_FIFO_WR_DONE 6
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#define EC_TRAN_READ_ENTRY 7
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#define EC_TRAN_READ_EXIT 8
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#define EC_TRAN_WRITE_ENTRY 9
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#define EC_TRAN_WRITE_EXIT 10
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#define EC_COMMAND 11
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#define EC_WRITE_PROTECT 12
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/* for compatibility */
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static long last_disk_activity = -1;
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/** static, private data **/
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static bool initialized = false;
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static long next_yield = 0;
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#define MIN_YIELD_PERIOD 1000
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static tCardInfo card_info[NUM_DRIVES];
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static tCardInfo *currcard = NULL; /* current active card */
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struct sd_card_status
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{
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int retry;
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int retry_max;
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};
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static struct sd_card_status sd_status[NUM_DRIVES] =
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{
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#ifdef HAVE_INTERNAL_SD
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{ 0, 1 },
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#endif
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#ifdef HAVE_HOTSWAP
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{ 0, 10 }
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#endif
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};
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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[] = "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 int sd_first_drive = 0;
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static bool sd_poll_status(unsigned int trigger, long timeout)
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{
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long t = USEC_TIMER;
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while ((SDISTATUS & trigger) != trigger)
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{
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long time = USEC_TIMER;
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if (TIME_AFTER(time, next_yield))
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{
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long ty = USEC_TIMER;
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yield();
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timeout += USEC_TIMER - 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_command(unsigned int cmd, unsigned int arg,
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unsigned long* response, unsigned int resp_type)
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{
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int sdi_cmd = cmd;
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sdi_cmd |= (127<<12) | (1<<11); /* max wait time | enable */
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if (resp_type)
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{
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/* response type & response required flag */
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sdi_cmd |= (resp_type<<7) | (1<<6);
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}
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if (cmd == SD_READ_SINGLE_BLOCK ||
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cmd == SD_READ_MULTIPLE_BLOCK ||
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cmd == SD_WRITE_BLOCK ||
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cmd == SD_WRITE_MULTIPLE_BLOCK)
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{
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sdi_cmd |= (1<<10); /* request data transfer */
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}
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if (!sd_poll_status(SDISTATUS_CMD_PATH_RDY, 100000))
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return -EC_COMMAND;
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SDIARGU = arg;
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SDICMD = sdi_cmd;
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udelay(10);
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if (response == NULL)
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return 0;
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if (!sd_poll_status(SDISTATUS_RESP_RCVD, 100000))
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return -EC_COMMAND;
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if (resp_type == SDICMD_RES_TYPE2)
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{
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response[0] = SDIRSPARGU0;
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response[1] = SDIRSPARGU1;
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response[2] = SDIRSPARGU2;
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response[3] = SDIRSPARGU3;
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}
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else
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{
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response[0] = SDIRSPARGU0;
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}
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return 0;
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}
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static int sd_wait_for_state(unsigned int state, int id)
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{
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unsigned long response = 0;
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unsigned int timeout = 0x80000;
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long start_time = USEC_TIMER;
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while (1)
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{
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int ret = sd_command
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(SD_SEND_STATUS, currcard->rca, &response, SDICMD_RES_TYPE1);
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long us;
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if (ret < 0)
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return ret*100 - id;
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if (((response >> 9) & 0xf) == state)
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{
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return 0;
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}
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if (TIME_AFTER(USEC_TIMER, start_time + timeout))
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return -EC_WAIT_STATE_FAILED*100 - id;
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us = USEC_TIMER;
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if (TIME_AFTER(us, next_yield))
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{
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yield();
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timeout += USEC_TIMER - us;
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next_yield = us + MIN_YIELD_PERIOD;
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}
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}
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}
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static void sd_card_mux(int card_no)
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{
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/* We only support the default card */
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(void)card_no;
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}
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#ifdef HAVE_HOTSWAP
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static inline bool card_detect_target(void)
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{
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#ifdef HAVE_HOTSWAP
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return (GPIOB & (1<<26)) == 0; /* low active */
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#else
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return false;
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#endif
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}
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static int sd1_oneshot_callback(struct timeout *tmo)
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{
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(void)tmo;
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/* This is called only if the state was stable for 300ms - check state
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* and post appropriate event. */
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if (card_detect_target())
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queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
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else
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queue_broadcast(SYS_HOTSWAP_EXTRACTED, 0);
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return 0;
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}
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void EXT0(void)
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{
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static struct timeout sd1_oneshot;
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timeout_register(&sd1_oneshot, sd1_oneshot_callback, (3*HZ/10), 0);
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}
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bool sd_removable(IF_MD_NONVOID(int card_no))
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{
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#ifndef HAVE_MULTIDRIVE
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const int card_no = 0;
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#endif
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return (card_no == CARD_NUM_SLOT);
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}
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bool sd_present(IF_MD_NONVOID(int card_no))
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{
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#ifdef HAVE_MULTIDRIVE
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(void)card_no;
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#endif
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return card_detect_target();
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}
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#else
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bool sd_removable(IF_MD_NONVOID(int card_no))
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{
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#ifndef HAVE_MULTIDRIVE
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const int card_no = 0;
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#endif
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(void)card_no;
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return false;
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}
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#endif /* HAVE_HOTSWAP */
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static void sd_init_device(int card_no)
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{
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int ret;
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unsigned long response;
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/* Initialise card data as blank */
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memset(currcard, 0, sizeof(*currcard));
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/* Switch card mux to card to initialize */
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sd_card_mux(card_no);
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#ifdef HAVE_HOTSWAP
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/* Check card is inserted */
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if (card_no == CARD_NUM_SLOT)
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{
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if (GPIOB & (1<<26))
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{
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ret = -EC_NOCARD;
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goto card_init_error;
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}
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/* Card will not power up unless this is done */
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GPIOC_CLEAR = (1<<24);
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}
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#endif
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ret = sd_command(SD_GO_IDLE_STATE, 0, NULL, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto card_init_error;
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/* Use slow clock during identification (24MHz / 60 = 400kHz) */
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SDICLK = (1<<12) | 59;
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sd_command(SD_SEND_IF_COND, 0x1aa, &response, SDICMD_RES_TYPE3);
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if (!sd_poll_status(SDISTATUS_CMD_PATH_RDY, 100000))
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goto card_init_error;
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currcard->ocr = 0;
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long start_tick = current_tick;
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while ((currcard->ocr & (1<<31)) == 0
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&& TIME_BEFORE(current_tick, start_tick + HZ))
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{
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udelay(100);
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sd_command(SD_APP_CMD, 0, NULL, SDICMD_RES_TYPE1);
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int arg = 0x100000 | ((response == 0x1aa) ? (1<<30):0);
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sd_command(SD_APP_OP_COND, arg, &currcard->ocr, SDICMD_RES_TYPE3);
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}
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if ((currcard->ocr & (1<<31)) == 0)
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{
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ret = -EC_POWER_UP;
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goto card_init_error;
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}
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ret = sd_command
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(SD_ALL_SEND_CID, 0, currcard->cid, SDICMD_RES_TYPE2);
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if (ret < 0)
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goto card_init_error;
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ret = sd_command
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(SD_SEND_RELATIVE_ADDR, 0, &currcard->rca, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto card_init_error;
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ret = sd_command
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(SD_SEND_CSD, currcard->rca, currcard->csd, SDICMD_RES_TYPE2);
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if (ret < 0)
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goto card_init_error;
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sd_parse_csd(currcard);
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ret = sd_command
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(SD_SELECT_CARD, currcard->rca, NULL, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto card_init_error;
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ret = sd_command
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(SD_APP_CMD, currcard->rca, NULL, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto card_init_error;
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ret = sd_command /* 4 bit */
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(SD_SET_BUS_WIDTH, currcard->rca | 2, NULL, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto card_init_error;
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ret = sd_command
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(SD_SET_BLOCKLEN, currcard->blocksize, NULL, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto card_init_error;
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currcard->initialized = 1;
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return;
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/* Card failed to initialize so disable it */
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card_init_error:
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currcard->initialized = ret;
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return;
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}
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/* lock must already be acquired */
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static void sd_select_device(int card_no)
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{
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currcard = &card_info[card_no];
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if (currcard->initialized > 0)
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{
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/* This card is already initialized - switch to it */
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sd_card_mux(card_no);
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return;
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}
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if (currcard->initialized == 0)
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{
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/* Card needs (re)init */
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sd_init_device(card_no);
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}
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}
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int sd_read_sectors(IF_MD2(int card_no,) unsigned long start, int incount,
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void* inbuf)
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{
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#ifndef HAVE_MULTIDRIVE
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const int card_no = 0;
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#endif
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int ret = 0;
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bool aligned;
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unsigned char* buf_end;
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mutex_lock(&sd_mtx);
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sd_enable(true);
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led(true);
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sd_read_retry:
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if ((card_no == CARD_NUM_SLOT) && !card_detect_target())
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{
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/* no external sd-card inserted */
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ret = -EC_NOCARD;
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goto sd_read_error;
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}
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sd_select_device(card_no);
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if (currcard->initialized < 0)
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{
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ret = currcard->initialized;
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goto sd_read_error;
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}
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last_disk_activity = current_tick;
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ret = sd_wait_for_state(SD_TRAN, EC_TRAN_READ_ENTRY);
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if (ret < 0)
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goto sd_read_error;
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/* Use full SD clock for data transfer (PCK_SDMMC) */
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SDICLK = (1<<13) | (1<<12); /* bypass divider | enable */
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/* Block count | FIFO count | Block size (2^9) | 4-bit bus */
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SDIDCTRL = (incount << 13) | (4<<8) | (9<<4) | (1<<2);
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SDIDCTRL |= (1<<12); /* nReset */
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SDIDCTRL2 = (1<<2); /* multi block, read */
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if (currcard->ocr & (1<<30))
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ret = sd_command(SD_READ_MULTIPLE_BLOCK, start, NULL, SDICMD_RES_TYPE1);
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else
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ret = sd_command(SD_READ_MULTIPLE_BLOCK, start * 512, NULL, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto sd_read_error;
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aligned = (((int)inbuf & 3) == 0);
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buf_end = (unsigned char *)inbuf + incount * currcard->blocksize;
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while (inbuf < (void*)buf_end)
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{
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if (!sd_poll_status(SDISTATUS_FIFO_FETCH_REQ, 100000))
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goto sd_read_error;
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if (aligned)
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{
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unsigned int* ptr = (unsigned int*)inbuf;
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*ptr++ = SDIRDATA;
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*ptr++ = SDIRDATA;
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*ptr++ = SDIRDATA;
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*ptr = SDIRDATA;
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}
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else
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{
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int tmp_buf[4];
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tmp_buf[0] = SDIRDATA;
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tmp_buf[1] = SDIRDATA;
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tmp_buf[2] = SDIRDATA;
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tmp_buf[3] = SDIRDATA;
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memcpy(inbuf, tmp_buf, 16);
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}
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inbuf += 16;
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}
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ret = sd_command(SD_STOP_TRANSMISSION, 0, NULL, SDICMD_RES_TYPE1);
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if (ret < 0)
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goto sd_read_error;
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ret = sd_wait_for_state(SD_TRAN, EC_TRAN_READ_EXIT);
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if (ret < 0)
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goto sd_read_error;
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while (1)
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{
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led(false);
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sd_enable(false);
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mutex_unlock(&sd_mtx);
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return ret;
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sd_read_error:
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if (sd_status[card_no].retry < sd_status[card_no].retry_max
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&& ret != -EC_NOCARD)
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{
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sd_status[card_no].retry++;
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currcard->initialized = 0;
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goto sd_read_retry;
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}
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}
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}
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int sd_write_sectors(IF_MD2(int card_no,) unsigned long start, int count,
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const void* outbuf)
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{
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/* Write support is not finished yet */
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/* TODO: The standard suggests using ACMD23 prior to writing multiple blocks
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to improve performance */
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#ifndef HAVE_MULTIDRIVE
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const int card_no = 0;
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#endif
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int ret;
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const unsigned char *buf_end;
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bool aligned;
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if ((card_no == CARD_NUM_SLOT) && (GPIOA & 0x10))
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{
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/* write protect tab set */
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return -EC_WRITE_PROTECT;
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}
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mutex_lock(&sd_mtx);
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sd_enable(true);
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led(true);
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sd_write_retry:
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if ((card_no == CARD_NUM_SLOT) && !card_detect_target())
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{
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/* no external sd-card inserted */
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ret = -EC_NOCARD;
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goto sd_write_error;
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}
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sd_select_device(card_no);
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if (currcard->initialized < 0)
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{
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ret = currcard->initialized;
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goto sd_write_error;
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}
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ret = sd_wait_for_state(SD_TRAN, EC_TRAN_WRITE_ENTRY);
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if (ret < 0)
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goto sd_write_error;
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/* Use full SD clock for data transfer (PCK_SDMMC) */
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SDICLK = (1<<13) | (1<<12); /* bypass divider | enable */
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/* Block count | FIFO count | Block size (2^9) | 4-bit bus */
|
|
SDIDCTRL = (count<<13) | (4<<8) | (9<<4) | (1<<2);
|
|
SDIDCTRL |= (1<<12); /* nReset */
|
|
|
|
SDIDCTRL2 = (1<<2) | (1<<1); /* multi block, write */
|
|
|
|
if (currcard->ocr & (1<<30))
|
|
ret = sd_command(SD_WRITE_MULTIPLE_BLOCK, start, NULL, SDICMD_RES_TYPE1);
|
|
else
|
|
ret = sd_command(SD_WRITE_MULTIPLE_BLOCK, start * 512, NULL, SDICMD_RES_TYPE1);
|
|
|
|
if (ret < 0)
|
|
goto sd_write_error;
|
|
|
|
aligned = (((int)outbuf & 3) == 0);
|
|
|
|
buf_end = (unsigned char *)outbuf + count * currcard->blocksize;
|
|
|
|
while (outbuf < (void*)buf_end)
|
|
{
|
|
if (aligned)
|
|
{
|
|
unsigned int* ptr = (unsigned int*)outbuf;
|
|
SDIWDATA = *ptr++;
|
|
SDIWDATA = *ptr++;
|
|
SDIWDATA = *ptr++;
|
|
SDIWDATA = *ptr;
|
|
}
|
|
else
|
|
{
|
|
int tmp_buf[4];
|
|
|
|
memcpy(tmp_buf, outbuf, 16);
|
|
|
|
SDIWDATA = tmp_buf[0];
|
|
SDIWDATA = tmp_buf[1];
|
|
SDIWDATA = tmp_buf[2];
|
|
SDIWDATA = tmp_buf[3];
|
|
}
|
|
outbuf += 16;
|
|
|
|
/* Wait for the FIFO to empty */
|
|
if (!sd_poll_status(SDISTATUS_FIFO_LOAD_REQ, 0x80000))
|
|
{
|
|
ret = -EC_FIFO_WR_EMPTY;
|
|
goto sd_write_error;
|
|
}
|
|
}
|
|
|
|
last_disk_activity = current_tick;
|
|
|
|
if (!sd_poll_status(SDISTATUS_MULTIBLOCK_END, 0x80000))
|
|
{
|
|
ret = -EC_FIFO_WR_DONE;
|
|
goto sd_write_error;
|
|
}
|
|
|
|
ret = sd_command(SD_STOP_TRANSMISSION, 0, NULL, SDICMD_RES_TYPE1);
|
|
if (ret < 0)
|
|
goto sd_write_error;
|
|
|
|
ret = sd_wait_for_state(SD_TRAN, EC_TRAN_WRITE_EXIT);
|
|
if (ret < 0)
|
|
goto sd_write_error;
|
|
|
|
while (1)
|
|
{
|
|
led(false);
|
|
sd_enable(false);
|
|
mutex_unlock(&sd_mtx);
|
|
|
|
return ret;
|
|
|
|
sd_write_error:
|
|
if (sd_status[card_no].retry < sd_status[card_no].retry_max
|
|
&& ret != -EC_NOCARD)
|
|
{
|
|
sd_status[card_no].retry++;
|
|
currcard->initialized = 0;
|
|
goto sd_write_retry;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void sd_thread(void) NORETURN_ATTR;
|
|
static void sd_thread(void)
|
|
{
|
|
struct queue_event ev;
|
|
bool idle_notified = false;
|
|
|
|
while (1)
|
|
{
|
|
queue_wait_w_tmo(&sd_queue, &ev, HZ);
|
|
|
|
switch ( ev.id )
|
|
{
|
|
#ifdef HAVE_HOTSWAP
|
|
case SYS_HOTSWAP_INSERTED:
|
|
case SYS_HOTSWAP_EXTRACTED:
|
|
fat_lock(); /* lock-out FAT activity first -
|
|
prevent deadlocking via disk_mount that
|
|
would cause a reverse-order attempt with
|
|
another thread */
|
|
mutex_lock(&sd_mtx); /* lock-out card activity - direct calls
|
|
into driver that bypass the fat cache */
|
|
|
|
/* We now have exclusive control of fat cache and ata */
|
|
|
|
/* Release "by force", ensure file descriptors aren't leaked and
|
|
any busy ones are invalid if mounting */
|
|
disk_unmount(sd_first_drive + CARD_NUM_SLOT);
|
|
|
|
/* Force card init for new card, re-init for re-inserted one or
|
|
* clear if the last attempt to init failed with an error. */
|
|
card_info[CARD_NUM_SLOT].initialized = 0;
|
|
sd_status[CARD_NUM_SLOT].retry = 0;
|
|
|
|
if (ev.id == SYS_HOTSWAP_INSERTED)
|
|
disk_mount(sd_first_drive + CARD_NUM_SLOT);
|
|
|
|
queue_broadcast(SYS_FS_CHANGED, 0);
|
|
|
|
/* Access is now safe */
|
|
mutex_unlock(&sd_mtx);
|
|
fat_unlock();
|
|
break;
|
|
#endif
|
|
case SYS_TIMEOUT:
|
|
if (TIME_BEFORE(current_tick, last_disk_activity+(3*HZ)))
|
|
{
|
|
idle_notified = false;
|
|
}
|
|
else
|
|
{
|
|
/* never let a timer wrap confuse us */
|
|
next_yield = USEC_TIMER;
|
|
|
|
if (!idle_notified)
|
|
{
|
|
call_storage_idle_notifys(false);
|
|
idle_notified = true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SYS_USB_CONNECTED:
|
|
usb_acknowledge(SYS_USB_CONNECTED_ACK);
|
|
/* Wait until the USB cable is extracted again */
|
|
usb_wait_for_disconnect(&sd_queue);
|
|
break;
|
|
|
|
case SYS_USB_DISCONNECTED:
|
|
usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void sd_enable(bool on)
|
|
{
|
|
if(on)
|
|
{
|
|
/* Enable controller & clock */
|
|
BCLKCTR |= DEV_SDMMC;
|
|
PCLK_SDMMC = PCK_EN | (CKSEL_PLL0<<24) | 7; /* 192/8 = 24MHz */
|
|
}
|
|
else
|
|
{
|
|
/* Disable controller & clock */
|
|
BCLKCTR &= ~DEV_SDMMC;
|
|
PCLK_SDMMC &= ~PCK_EN;
|
|
}
|
|
}
|
|
|
|
int sd_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!initialized)
|
|
mutex_init(&sd_mtx);
|
|
|
|
mutex_lock(&sd_mtx);
|
|
|
|
led(false);
|
|
|
|
if (!initialized)
|
|
{
|
|
initialized = true;
|
|
|
|
SWRESET |= DEV_SDMMC;
|
|
SWRESET &= ~DEV_SDMMC;
|
|
|
|
/* Configure dual-purpose pins for SD usage */
|
|
PORTCFG0 &= ~(3<<16);
|
|
PORTCFG0 |= (1<<16); /* SD_D0 & SD_D1 */
|
|
|
|
PORTCFG2 &= ~((3<<2) | (3<<0));
|
|
PORTCFG2 |= ((1<<2) | (1<<0)); /* SD_D2/D3/CK/CMD */
|
|
|
|
/* Configure card detection GPIO as input */
|
|
GPIOB_DIR &= ~(1<<26);
|
|
|
|
/* Configure card power(?) GPIO as output */
|
|
GPIOC_DIR |= (1<<24);
|
|
|
|
queue_init(&sd_queue, true);
|
|
create_thread(sd_thread, sd_stack, sizeof(sd_stack), 0,
|
|
sd_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE)
|
|
IF_COP(, CPU));
|
|
|
|
sleep(HZ/10);
|
|
|
|
#ifdef HAVE_HOTSWAP
|
|
/* Configure interrupts for the card slot */
|
|
TMODE &= ~EXT0_IRQ_MASK; /* edge-triggered */
|
|
TMODEA |= EXT0_IRQ_MASK; /* trigger on both edges */
|
|
IEN |= EXT0_IRQ_MASK; /* enable the interrupt */
|
|
#endif
|
|
}
|
|
|
|
mutex_unlock(&sd_mtx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
long sd_last_disk_activity(void)
|
|
{
|
|
return last_disk_activity;
|
|
}
|
|
|
|
tCardInfo *card_get_info_target(int card_no)
|
|
{
|
|
return &card_info[card_no];
|
|
}
|
|
|
|
#ifdef CONFIG_STORAGE_MULTI
|
|
|
|
int sd_num_drives(int first_drive)
|
|
{
|
|
/* Store which logical drive number(s) we have been assigned */
|
|
sd_first_drive = first_drive;
|
|
|
|
#if defined(HAVE_INTERNAL_SD) && defined(HAVE_HOTSWAP)
|
|
return 2;
|
|
#else
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
void sd_sleepnow(void)
|
|
{
|
|
}
|
|
|
|
bool sd_disk_is_active(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
int sd_soft_reset(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int sd_spinup_time(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_STORAGE_MULTI */
|