From 9b9bd471edae25a3ec4771485329f7ce6734c3ed Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Sun, 29 May 2011 16:19:21 +0000
Subject: [PATCH] Enhancements to the SDC driver.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3002 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/hal/include/sdc.h             | 26 ++++++++++++++++++++++++++
 os/hal/platforms/STM32/sdc_lld.h |  1 +
 readme.txt                       |  1 +
 3 files changed, 28 insertions(+)

diff --git a/os/hal/include/sdc.h b/os/hal/include/sdc.h
index 2c35b8a0e..3f0634fc5 100644
--- a/os/hal/include/sdc.h
+++ b/os/hal/include/sdc.h
@@ -163,6 +163,32 @@ typedef enum {
  */
 #define SDC_R1_IS_CARD_LOCKED(r1)       (((r1) >> 21) & 1)
 
+/**
+ * @brief   Returns the driver state.
+ *
+ * @param[in] sdcp      pointer to the @p SDCDriver object
+ * @return              The driver state.
+ *
+ * @api
+ */
+#define sdcGetDriverState(sdcp)         ((sdcp)->state)
+
+/**
+ * @brief   Returns the write protect status.
+ * @note    This macro wraps a low level function named
+ *          @p sdc_lld_is_write_protected(), this function must be
+ *          provided by the application because it is not part of the
+ *          SDC driver.
+ *
+ * @param[in] sdcp      pointer to the @p SDCDriver object
+ * @return              The card state.
+ * @retval FALSE        card not inserted.
+ * @retval TRUE         card inserted.
+ *
+ * @api
+ */
+#define sdcIsWriteProtected(sdcp) (sdc_lld_is_write_protected(sdcp))
+
 /*===========================================================================*/
 /* External declarations.                                                    */
 /*===========================================================================*/
diff --git a/os/hal/platforms/STM32/sdc_lld.h b/os/hal/platforms/STM32/sdc_lld.h
index c0d1b8bdd..a856fbf2b 100644
--- a/os/hal/platforms/STM32/sdc_lld.h
+++ b/os/hal/platforms/STM32/sdc_lld.h
@@ -190,6 +190,7 @@ extern "C" {
                       uint8_t *buf, uint32_t n);
   bool_t sdc_lld_write(SDCDriver *sdcp, uint32_t startblk,
                        const uint8_t *buf, uint32_t n);
+  bool_t sdc_lld_is_write_protected(SDCDriver *sdcp);
 #ifdef __cplusplus
 }
 #endif
diff --git a/readme.txt b/readme.txt
index cfa33c642..851f2e0b0 100644
--- a/readme.txt
+++ b/readme.txt
@@ -72,6 +72,7 @@
 
 *** 2.3.4 ***
 - NEW: Now the STM32 SDC driver supports unaligned buffers transparently.
+  Optimized the driver for single block read and write operations.
 
 *** 2.3.3 ***
 - FIX: Fixed race condition in output queues (bug 3303908)(backported