645680d62b
Past development has proved that one can mistakely use the same pin for two uses without noticing. Since this causes extremely hard to find bugs, the infrastructure will allow to register pin uses and panic when a conflict is detected. The pinctrl debug now shows the pin uses when its support is compiled in. Change-Id: Idb2d5235ce09207d77aa474d6f158e72b933761a
318 lines
8.9 KiB
C
318 lines
8.9 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 "mmc.h"
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#include "sdmmc.h"
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#include "storage.h"
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#include "ssp-imx233.h"
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#include "pinctrl-imx233.h"
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/**
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* This code assumes a single eMMC internal flash
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*/
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#ifdef SANSA_FUZEPLUS
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#define MMC_SSP 2
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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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#define MMC_RCA 1
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/** When set, this values restrict the windows of the read and writes */
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static unsigned mmc_window_start = 0;
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static unsigned mmc_window_end = INT_MAX;
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static bool mmc_window_enable = true;
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static long mmc_last_activity = -1;
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static bool mmc_is_active = false;
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static unsigned mmc_size = 0;
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static struct mutex mmc_mutex;
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void imx233_mmc_disable_window(void)
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{
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mmc_window_enable = false;
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}
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int mmc_init(void)
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{
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mutex_init(&mmc_mutex);
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imx233_ssp_start(MMC_SSP);
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imx233_ssp_softreset(MMC_SSP);
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imx233_ssp_set_mode(MMC_SSP, HW_SSP_CTRL1__SSP_MODE__SD_MMC);
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#ifdef SANSA_FUZEPLUS
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/** Sansa Fuze+ has an internal eMMC 8-bit wide flash, power gate is pin PWM3
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* and power up time is 20ms */
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imx233_pinctrl_acquire_pin(1, 29, "emmc power");
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imx233_set_pin_function(1, 29, PINCTRL_FUNCTION_GPIO);
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imx233_enable_gpio_output(1, 29, true);
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imx233_set_gpio_output(1, 29, false);
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sleep(HZ / 5);
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imx233_ssp_setup_ssp2_sd_mmc_pins(true, 8, PINCTRL_DRIVE_8mA);
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#endif
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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(MMC_SSP, 240, 0, 0xffff);
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imx233_ssp_sd_mmc_power_up_sequence(MMC_SSP);
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imx233_ssp_set_bus_width(MMC_SSP, 1);
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imx233_ssp_set_block_size(MMC_SSP, 9);
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/* go to idle state */
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int ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 0, 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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/* send op cond until the card respond with busy bit set; it must complete within 1sec */
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unsigned timeout = current_tick + HZ;
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do
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{
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uint32_t ocr;
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 1, 0x40ff8000, SSP_SHORT_RESP, NULL, 0, false, false, &ocr);
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if(ret == 0 && ocr & (1 << 31))
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break;
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}while(!TIME_AFTER(current_tick, timeout));
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if(ret != 0)
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return -2;
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/* get CID */
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uint32_t cid[4];
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 2, 0, SSP_LONG_RESP, NULL, 0, false, false, cid);
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if(ret != 0)
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return -3;
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/* Set RCA */
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uint32_t status;
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 3, MMC_RCA << 16, SSP_SHORT_RESP, NULL, 0, false, false, &status);
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if(ret != 0)
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return -4;
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/* Select card */
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 7, MMC_RCA << 16, SSP_SHORT_RESP, NULL, 0, false, false, &status);
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if(ret != 0)
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return -5;
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/* Check TRAN state */
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 13, MMC_RCA << 16, SSP_SHORT_RESP, NULL, 0, false, false, &status);
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if(ret != 0)
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return -6;
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if(((status >> 9) & 0xf) != 4)
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return -7;
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/* Switch to 8-bit bus */
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 6, 0x3b70200, SSP_SHORT_RESP, NULL, 0, true, false, &status);
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if(ret != 0)
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return -8;
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/* switch error ? */
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if(status & 0x80)
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return -9;
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imx233_ssp_set_bus_width(MMC_SSP, 8);
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/* Switch to high speed mode */
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 6, 0x3b90100, SSP_SHORT_RESP, NULL, 0, true, false, &status);
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if(ret != 0)
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return -10;
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/* switch error ?*/
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if(status & 0x80)
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return -11;
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/* SSPCLK @ 96MHz
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* gives bitrate of 96 / 2 / 1 = 48MHz */
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imx233_ssp_set_timings(MMC_SSP, 2, 0, 0xffff);
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/* read extended CSD */
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{
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uint8_t ext_csd[512];
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 8, 0, SSP_SHORT_RESP, ext_csd, 1, true, true, &status);
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if(ret != 0)
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return -12;
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uint32_t *sec_count = (void *)&ext_csd[212];
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mmc_size = *sec_count;
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}
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#ifdef SANSA_FUZEPLUS
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if(mmc_window_enable)
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{
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/**
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* The Fuze+ uses a strange layout: is has a first MBR at sector 0 with four entries:
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* 1) Actual user partition
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* 2) Sigmatel boot partition
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* 3)4) Other (certificate related ?) partitions
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* The partition 1) has type 1 but it's actually a type 5 (logical partition) with
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* a second partition table with usually one entry which is the FAT32 one.
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* The first table uses 512-byte sector size and the second one usually uses
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* 2048-byte logical sector size.
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*
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* We restrict mmc window to the user partition */
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uint8_t mbr[512];
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mmc_window_start = 0;
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mmc_window_end = INT_MAX;
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ret = mmc_read_sectors(IF_MD2(0,) 0, 1, mbr);
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if(ret != 0)
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return -100;
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if(mbr[510] != 0x55 || mbr[511] != 0xAA)
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return -101; /* invalid MBR */
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/* sanity check that the first partition is greater than 2Gib */
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uint8_t *ent = &mbr[446];
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mmc_window_start = ent[8] | ent[9] << 8 | ent[10] << 16 | ent[11] << 24;
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mmc_window_end = (ent[12] | ent[13] << 8 | ent[14] << 16 | ent[15] << 24) +
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mmc_window_start;
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if(ent[4] == 0x53)
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return -102; /* sigmatel partition */
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if((mmc_window_end - mmc_window_start) < 4 * 1024 * 1024)
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return -103; /* partition too small */
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mmc_size = mmc_window_end - mmc_window_start;
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}
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#endif
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return 0;
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}
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int mmc_num_drives(int first_drive)
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{
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(void) first_drive;
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return 1;
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}
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#ifdef STORAGE_GET_INFO
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void mmc_get_info(IF_MD2(int drive,) struct storage_info *info)
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{
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#ifdef HAVE_MULTIDRIVE
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(void) drive;
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#endif
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info->sector_size = 512;
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info->num_sectors = mmc_size;
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info->vendor = "Rockbox";
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info->product = "Internal Storage";
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info->revision = "0.00";
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}
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#endif
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static int transfer_sectors(IF_MD2(int drive,) unsigned long start, int count, void *buf, bool read)
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{
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IF_MD((void) drive);
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/* check window */
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start += mmc_window_start;
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if((start + count) > mmc_window_end)
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return -201;
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/* get mutex (needed because we do multiple commands for count > 0) */
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mutex_lock(&mmc_mutex);
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int ret = 0;
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uint32_t resp;
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mmc_last_activity = current_tick;
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mmc_is_active = true;
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do
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{
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int this_count = MIN(count, IMX233_MAX_SSP_XFER_SIZE / 512);
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if(this_count == 1)
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{
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, read ? 17 : 24, start,
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SSP_SHORT_RESP, buf, this_count, false, read, &resp);
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}
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else
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{
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 23, this_count, SSP_SHORT_RESP, NULL,
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0, false, false, &resp);
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if(ret == 0)
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ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, read ? 18 : 25, start,
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SSP_SHORT_RESP, buf, this_count, false, read, &resp);
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}
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count -= this_count;
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start += this_count;
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buf += this_count * 512;
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}while(count != 0 && ret == SSP_SUCCESS);
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mmc_is_active = false;
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mutex_unlock(&mmc_mutex);
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return ret;
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}
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int mmc_read_sectors(IF_MD2(int drive,) unsigned long start, int count, void *buf)
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{
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return transfer_sectors(IF_MD2(drive,) start, count, buf, true);
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}
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int mmc_write_sectors(IF_MD2(int drive,) unsigned long start, int count, const void* buf)
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{
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return transfer_sectors(IF_MD2(drive,) start, count, (void *)buf, false);
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}
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bool mmc_present(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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bool mmc_removable(IF_MD(int drive))
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{
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IF_MD((void) drive);
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return false;
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}
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void mmc_sleep(void)
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{
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}
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void mmc_sleepnow(void)
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{
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}
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bool mmc_disk_is_active(void)
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{
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return mmc_is_active;
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}
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bool mmc_usb_active(void)
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{
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return mmc_disk_is_active();
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}
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int mmc_soft_reset(void)
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{
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return 0;
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}
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int mmc_flush(void)
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{
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return 0;
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}
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void mmc_spin(void)
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{
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}
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void mmc_spindown(int seconds)
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{
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(void) seconds;
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}
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long mmc_last_disk_activity(void)
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{
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return mmc_last_activity;
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}
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int mmc_spinup_time(void)
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{
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return 0;
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}
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void mmc_enable(bool enable)
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{
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(void) enable;
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}
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