zoul: remote: Add support for SD/MMC

This change adds SD/MMC support at block level, by porting the SD/MMC
driver.

Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>

platform/zoul/README.md

@@ -60,6 +60,7 @@ In terms of hardware support, the following drivers have been implemented for th
     * Built-in core temperature and battery sensor.
   * CC1200 sub-1GHz radio interface.
   * Real Time Clock Calendar (on the RE-Mote platform).
+  * SD
 
 There is a Zoul powering the RE-Mote and Firefly platforms, check out its specific README files for more information about on-board features.
 

platform/zoul/dev/mmc-arch.c

@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2016, Benoît Thébaudeau <benoit@wsystem.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * \addtogroup mmc-arch
+ * @{
+ *
+ * \file
+ * Implementation of the SD/MMC device driver RE-Mote-specific definitions.
+ */
+#include <stddef.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include "spi-arch.h"
+#include "dev/ioc.h"
+#include "dev/gpio.h"
+#include "dev/spi.h"
+#include "mmc-arch.h"
+
+#define USD_SEL_PORT_BASE       GPIO_PORT_TO_BASE(USD_SEL_PORT)
+#define USD_SEL_PIN_MASK        GPIO_PIN_MASK(USD_SEL_PIN)
+
+/*----------------------------------------------------------------------------*/
+static void
+mmc_arch_init(void)
+{
+  static uint8_t init_done;
+
+  if(init_done) {
+    return;
+  }
+
+  GPIO_SET_INPUT(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
+  GPIO_SOFTWARE_CONTROL(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
+  ioc_set_over(USD_SEL_PORT, USD_SEL_PIN, IOC_OVERRIDE_DIS);
+
+  spix_cs_init(USD_CSN_PORT, USD_CSN_PIN);
+  spix_init(USD_SPI_INSTANCE);
+  spix_set_mode(USD_SPI_INSTANCE, SSI_CR0_FRF_MOTOROLA, 0, 0, 8);
+
+  init_done = 1;
+}
+/*----------------------------------------------------------------------------*/
+bool
+mmc_arch_get_cd(uint8_t dev)
+{
+  mmc_arch_init();
+
+  if(GPIO_IS_OUTPUT(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK)) {
+    /* Card previously detected and powered */
+    return true;
+  } else if(GPIO_READ_PIN(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK)) {
+    /* Card inserted -> power it */
+    GPIO_SET_OUTPUT(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
+    GPIO_CLR_PIN(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
+    return true;
+  } else {
+    /* No card detected */
+    return false;
+  }
+}
+/*----------------------------------------------------------------------------*/
+bool
+mmc_arch_get_wp(uint8_t dev)
+{
+  return false;
+}
+/*----------------------------------------------------------------------------*/
+void
+mmc_arch_spi_select(uint8_t dev, bool sel)
+{
+  if(sel) {
+    SPIX_CS_CLR(USD_CSN_PORT, USD_CSN_PIN);
+  } else {
+    SPIX_CS_SET(USD_CSN_PORT, USD_CSN_PIN);
+  }
+}
+/*----------------------------------------------------------------------------*/
+void
+mmc_arch_spi_set_clock_freq(uint8_t dev, uint32_t freq)
+{
+  spix_set_clock_freq(USD_SPI_INSTANCE, freq);
+}
+/*----------------------------------------------------------------------------*/
+void
+mmc_arch_spi_xfer(uint8_t dev, const void *tx_buf, size_t tx_cnt,
+                  void *rx_buf, size_t rx_cnt)
+{
+  const uint8_t *tx_buf_u8 = tx_buf;
+  uint8_t *rx_buf_u8 = rx_buf;
+
+  while(tx_cnt || rx_cnt) {
+    SPIX_WAITFORTxREADY(USD_SPI_INSTANCE);
+    if(tx_cnt) {
+      SPIX_BUF(USD_SPI_INSTANCE) = *tx_buf_u8++;
+      tx_cnt--;
+    } else {
+      SPIX_BUF(USD_SPI_INSTANCE) = 0;
+    }
+    SPIX_WAITFOREOTx(USD_SPI_INSTANCE);
+    SPIX_WAITFOREORx(USD_SPI_INSTANCE);
+    if(rx_cnt) {
+      *rx_buf_u8++ = SPIX_BUF(USD_SPI_INSTANCE);
+      rx_cnt--;
+    } else {
+      SPIX_BUF(USD_SPI_INSTANCE);
+    }
+  }
+}
+/*----------------------------------------------------------------------------*/
+
+/** @} */

platform/zoul/remote-reva/Makefile.remote-reva

@@ -1,2 +1,4 @@
 MOTELIST_ZOLERTIA = remote
-BOARD_SOURCEFILES += board.c antenna-sw.c rtcc.c power-mgmt.c leds-arch.c
+BOARD_SOURCEFILES += board.c antenna-sw.c mmc-arch.c rtcc.c power-mgmt.c leds-arch.c
+
+MODULES += dev/disk/mmc

platform/zoul/remote-reva/board.h

@@ -405,6 +405,7 @@
  * external module, to be used with SSI1
  * @{
  */
+#define USD_SPI_INSTANCE         1
 #define USD_CLK_PORT             SPI1_CLK_PORT
 #define USD_CLK_PIN              SPI1_CLK_PIN
 #define USD_MOSI_PORT            SPI1_TX_PORT

platform/zoul/remote-revb/Makefile.remote-revb

@@ -1,2 +1,4 @@
 MOTELIST_ZOLERTIA = remote
-BOARD_SOURCEFILES += board.c antenna-sw.c rtcc.c leds-res-arch.c power-mgmt.c
+BOARD_SOURCEFILES += board.c antenna-sw.c mmc-arch.c rtcc.c leds-res-arch.c power-mgmt.c
+
+MODULES += dev/disk/mmc

platform/zoul/remote-revb/board.h

@@ -433,6 +433,7 @@
  * a microSD in the slot, or when connected to disable the microSD to save power
  * @{
  */
+#define USD_SPI_INSTANCE         1
 #define USD_CLK_PORT             SPI1_CLK_PORT
 #define USD_CLK_PIN              SPI1_CLK_PIN
 #define USD_MOSI_PORT            SPI1_TX_PORT