7d4fed53cc
- now identity map dram uncached and have a cached and buffered virtual alias - rework dma to handle virtual to physical pointers conversion - fix lcd frame pointer - implement usb detection properly - implement bootloader usb properly - allow the bootloader to disable MMC windowing (useful for recovery) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30432 a1c6a512-1295-4272-9138-f99709370657
235 lines
6.7 KiB
C
235 lines
6.7 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) 2011 by Amaury Pouly
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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 "config.h"
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#include "system.h"
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#include "sd.h"
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#include "sdmmc.h"
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#include "ssp-imx233.h"
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#include "pinctrl-imx233.h"
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#include "button-target.h"
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#include "fat.h"
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#include "disk.h"
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#include "usb.h"
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#include "debug.h"
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/**
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* This code assumes a single SD card slot
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*/
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#ifdef SANSA_FUZEPLUS
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#define SD_SSP 1
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#else
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#error You need to configure the ssp to use
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#endif
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static tCardInfo card_info;
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static long sd_stack [(DEFAULT_STACK_SIZE*2 + 0x200)/sizeof(long)];
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static struct mutex sd_mutex;
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static const char sd_thread_name[] = "sd";
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static struct event_queue sd_queue;
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static int sd_first_drive;
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static int last_disk_activity;
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static void sd_detect_callback(int ssp)
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{
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(void)ssp;
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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(imx233_ssp_sdmmc_detect(SD_SSP))
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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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imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback);
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}
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void sd_enable(bool on)
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{
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static bool sd_enable = false;
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if(sd_enable == on)
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return;
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mutex_lock(&sd_mutex);
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if(on)
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imx233_ssp_start(SD_SSP);
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else
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imx233_ssp_stop(SD_SSP);
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mutex_unlock(&sd_mutex);
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sd_enable = on;
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}
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static int sd_init_card(void)
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{
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imx233_ssp_start(SD_SSP);
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imx233_ssp_softreset(SD_SSP);
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imx233_ssp_set_mode(SD_SSP, HW_SSP_CTRL1__SSP_MODE__SD_MMC);
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/* SSPCLK @ 96MHz
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* gives bitrate of 96000 / 240 / 1 = 400kHz */
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imx233_ssp_set_timings(SD_SSP, 240, 0, 0xffff);
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imx233_ssp_set_bus_width(SD_SSP, 1);
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imx233_ssp_set_block_size(SD_SSP, 9);
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card_info.rca = 0;
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bool is_v2 = false;
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uint32_t resp;
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/* go to idle state */
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int ret = imx233_ssp_sd_mmc_transfer(SD_SSP, SD_GO_IDLE_STATE, 0, SSP_NO_RESP, NULL, 0, false, false, NULL);
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if(ret != 0)
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return -1;
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/* CMD8 Check for v2 sd card. Must be sent before using ACMD41
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Non v2 cards will not respond to this command*/
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ret = imx233_ssp_sd_mmc_transfer(SD_SSP, SD_SEND_IF_COND, 0x1AA, SSP_SHORT_RESP, NULL, 0, false, false, &resp);
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if(ret == 0 && (resp & 0xFFF) == 0x1AA)
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is_v2 = true;
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return -10;
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}
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static void sd_thread(void) NORETURN_ATTR;
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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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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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case SYS_HOTSWAP_INSERTED:
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case SYS_HOTSWAP_EXTRACTED:
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{
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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_mutex); /* 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 sd */
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disk_unmount(sd_first_drive); /* 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.initialized = 0;
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if(ev.id == SYS_HOTSWAP_INSERTED)
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{
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int ret = sd_init_card();
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if(ret == 0)
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{
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ret = disk_mount(sd_first_drive); /* 0 if fail */
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if(ret < 0)
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DEBUGF("disk_mount failed: %d", ret);
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}
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else
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DEBUGF("sd_init_card failed: %d", ret);
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}
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/*
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* Mount succeeded, or this was an EXTRACTED event,
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* in both cases notify the system about the changed filesystems
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*/
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if(card_info.initialized)
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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_mutex);
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fat_unlock();
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}
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break;
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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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sd_enable(false);
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break;
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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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}
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}
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}
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int sd_init(void)
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{
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mutex_init(&sd_mutex);
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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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#ifdef SANSA_FUZEPLUS
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imx233_ssp_setup_ssp1_sd_mmc_pins(true, 4, PINCTRL_DRIVE_8mA, false);
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#endif
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imx233_ssp_sdmmc_setup_detect(SD_SSP, true, sd_detect_callback);
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if(imx233_ssp_sdmmc_detect(SD_SSP))
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queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
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return 0;
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}
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int sd_read_sectors(IF_MD2(int drive,) unsigned long start, int count,
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void* buf)
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{
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IF_MD((void) drive);
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(void) start;
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(void) count;
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(void) buf;
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return -1;
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}
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int sd_write_sectors(IF_MD2(int drive,) unsigned long start, int count,
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const void* buf)
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{
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IF_MD((void) drive);
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(void) start;
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(void) count;
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(void) buf;
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return -1;
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}
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tCardInfo *card_get_info_target(int card_no)
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{
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(void)card_no;
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return NULL;
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}
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int sd_num_drives(int first_drive)
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{
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sd_first_drive = first_drive;
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return 1;
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}
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bool sd_present(IF_MD(int drive))
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{
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IF_MD((void) drive);
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return imx233_ssp_sdmmc_detect(SD_SSP);
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}
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bool sd_removable(IF_MD(int drive))
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{
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IF_MD((void) drive);
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return true;
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}
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