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Diffstat (limited to 'firmware/target/arm/imx233/mmc-imx233.c')
-rw-r--r--firmware/target/arm/imx233/mmc-imx233.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/firmware/target/arm/imx233/mmc-imx233.c b/firmware/target/arm/imx233/mmc-imx233.c
new file mode 100644
index 0000000000..f56ff3725c
--- /dev/null
+++ b/firmware/target/arm/imx233/mmc-imx233.c
@@ -0,0 +1,100 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2011 by Amaury Pouly
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "system.h"
+#include "mmc.h"
+#include "sdmmc.h"
+#include "ssp-imx233.h"
+#include "pinctrl-imx233.h"
+#include "button-target.h"
+
+#ifdef SANSA_FUZEPLUS
+#define MMC_SSP 2
+#else
+#error You need to configure the ssp to use
+#endif
+
+int mmc_init(void)
+{
+ imx233_ssp_start(MMC_SSP);
+ imx233_ssp_softreset(MMC_SSP);
+ imx233_ssp_set_mode(MMC_SSP, HW_SSP_CTRL1__SSP_MODE__SD_MMC);
+ #ifdef SANSA_FUZEPLUS
+ /** Sansa Fuze+ has an internal eMMC 8-bit wide flash, power gate is pin PWM3 */
+ imx233_set_pin_function(1, 29, PINCTRL_FUNCTION_GPIO);
+ imx233_enable_gpio_output(1, 29, true);
+ imx233_set_gpio_output(1, 29, false);
+
+ imx233_ssp_setup_ssp2_sd_mmc_pins(true, 8, PINCTRL_DRIVE_8mA);
+ #endif
+ /* SSPCLK @ 120MHz
+ * gives bitrate of 120 / 100 / 3 = 400kHz */
+ imx233_ssp_set_timings(MMC_SSP, 100, 2);
+ imx233_ssp_set_timeout(MMC_SSP, 0xffff);
+ imx233_ssp_sd_mmc_power_up_sequence(MMC_SSP);
+ /* go to idle state */
+ int ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, SD_GO_IDLE_STATE, 0, SSP_NO_RESP, NULL, 0, false, NULL);
+ if(ret != 0)
+ return -1;
+ /* send op cond until the card respond with busy bit set; it must complete within 1sec */
+ unsigned timeout = current_tick + HZ;
+ do
+ {
+ uint32_t ocr;
+ ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 1, 0x40ff8000, SSP_SHORT_RESP, NULL, 0, false, &ocr);
+ if(ret == 0 && ocr & (1 << 31))
+ break;
+ }while(!TIME_AFTER(current_tick, timeout));
+
+ if(ret != 0)
+ return -2;
+
+ uint32_t cid[4];
+ ret = imx233_ssp_sd_mmc_transfer(MMC_SSP, 2, 0, SSP_LONG_RESP, NULL, 0, false, cid);
+ if(ret != 0)
+ return -3;
+
+ return 0;
+}
+
+int mmc_num_drives(int first_drive)
+{
+ (void) first_drive;
+ return 1;
+}
+
+int mmc_read_sectors(IF_MD2(int drive,) unsigned long start, int count, void* buf)
+{
+ IF_MD((void) drive);
+ (void) start;
+ (void) count;
+ (void) buf;
+ return -1;
+}
+
+int mmc_write_sectors(IF_MD2(int drive,) unsigned long start, int count, const void* buf)
+{
+ IF_MD((void) drive);
+ (void) start;
+ (void) count;
+ (void) buf;
+ return -1;
+}