fuze+: add more clocking code, add dma code, add ssp code, add stub usb code, update storage to SD + MMC, beginning of the driver

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30010 a1c6a512-1295-4272-9138-f99709370657

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;
+}