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Add hooks for SD media change callbacks

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4267 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-01-06 01:58:03 +00:00
parent 5c005c857c
commit 6b451e6c7c
1 changed files with 380 additions and 199 deletions
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181
configs/olimex-lpc1766stk/src/up_ssp.c
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@ -45,6 +45,10 @@
#include <debug.h>
#include <nuttx/spi.h>
#ifdef CONFIG_SPI_CALLBACK
#include <nuttx/irq.h>
#endif
#include <arch/board/board.h>
#include "up_arch.h"
@ -57,7 +61,15 @@
/************************************************************************************
* Definitions
************************************************************************************/
/* Configuration ************************************************************/
#ifdef CONFIG_SPI_CALLBACK
# ifndef CONFIG_GPIO_IRQ
# warning "CONFIG_GPIO_IRQ is required to support CONFIG_SPI_CALLBACK"
# endif
#endif
/* Debug ********************************************************************/
/* The following enable debug output from this file (needs CONFIG_DEBUG too).
*
* CONFIG_SSP_DEBUG - Define to enable basic SSP debug
@ -87,10 +99,113 @@
# define ssp_dumpssp1gpio(m)
#endif
/************************************************************************************
* Private Types
************************************************************************************/
/* This structure describes on media change callback */
#ifdef CONFIG_SPI_CALLBACK
struct lpc17_mediachange_s
{
spi_mediachange_t callback; /* The media change callback */
FAR void *arg; /* Callback argument */
};
#endif
/************************************************************************************
* Private Data
************************************************************************************/
/* Registered media change callback */
#ifdef CONFIG_SPI_CALLBACK
#ifdef CONFIG_LPC17_SSP0
static struct lpc17_mediachange_s g_ssp0callback;
#endif
#ifdef CONFIG_LPC17_SSP1
static struct lpc17_mediachange_s g_ssp1callback;
#endif
#endif
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Name: ssp_cdirqsetup
*
* Description:
* Setup to receive a card detection interrupt
*
************************************************************************************/
#ifdef CONFIG_SPI_CALLBACK
static void ssp_cdirqsetup(int irq, xcpt_t irqhandler)
{
irqstate_t flags;
/* Disable interrupts until we are done */
flags = irqsave();
/* Configure the interrupt. Either attach and enable the new
* interrupt or disable and detach the old interrupt handler.
*/
if (irqhandler)
{
/* Attach then enable the new interrupt handler */
(void)irq_attach(irq, irqhandler);
up_enable_irq(irq);
}
else
{
/* Disable then then detach the the old interrupt handler */
up_disable_irq(irq);
(void)irq_detach(irq);
}
}
#endif
/************************************************************************************
* Name: ssp0/1_cdinterrupt
*
* Description:
* Handle card detection interrupt
*
************************************************************************************/
#ifdef CONFIG_SPI_CALLBACK
#ifdef CONFIG_LPC17_SSP0
static int ssp0_cdinterrupt(int irq, FAR void *context)
{
/* Invoke the media change callback */
if (g_ssp0callback.callback)
{
g_ssp0callback.callback(g_ssp0callback.arg);
}
return OK;
}
#endif
#ifdef CONFIG_LPC17_SSP1
static int ssp1_cdinterrupt(int irq, FAR void *context)
{
/* Invoke the media change callback */
if (g_ssp1callback.callback)
{
g_ssp1callback.callback(g_ssp1callback.arg);
}
return OK;
}
#endif
#endif
/************************************************************************************
* Public Functions
************************************************************************************/
@ -127,6 +242,12 @@ void weak_function lpc17_sspinitialize(void)
lpc17_configgpio(LPC1766STK_MMC_PWR);
ssp_dumpssp0gpio("AFTER SSP1 Initialization");
#endif
#ifdef CONFIG_SPI_CALLBACK
/* If there were any CD detect pins for the LPC1766-STK, this is where
* they would be configured.
*/
#endif
}
/************************************************************************************
@ -196,4 +317,64 @@ uint8_t lpc17_ssp1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
}
#endif
/************************************************************************************
* Name: lpc17_ssp0/1register
*
* Description:
* If the board supports a card detect callback to inform the SPI-based
* MMC/SD drvier when an SD card is inserted or removed, then
* CONFIG_SPI_CALLBACK should be defined and the following function(s) must
* must be implemented. These functiosn implements the registercallback
* method of the SPI interface (see include/nuttx/spi.h for details)
*
* Input Parameters:
* dev - Device-specific state data
* callback - The funtion to call on the media change
* arg - A caller provided value to return with the callback
*
* Returned Value:
* 0 on success; negated errno on failure.
*
************************************************************************************/
#ifdef CONFIG_SPI_CALLBACK
#ifdef CONFIG_LPC17_SSP0
/* If there were any CD detect pins on the LPC1766-STK, this is how the
* would be configured.
*/
int lpc17_ssp0register(FAR struct spi_dev_s *dev, spi_mediachange_t callback, void *arg)
{
/* Save the callback information */
#if 0
g_ssp0callback.callback = callback;
g_ssp0callback.arg = arg;
/* Setup the interrupt */
spi_cdirqsetup(LPC1766STK_SPICD_IRQ, ssp0_cdinterrupt);
#endif
return OK;
}
#endif
#ifdef CONFIG_LPC17_SSP1
int lpc17_ssp1register(FAR struct spi_dev_s *dev, spi_mediachange_t callback, void *arg)
{
/* Save the callback information */
#if 0
g_ssp1callback.callback = callback;
g_ssp1callback.arg = arg;
/* Setup the interrupt */
spi_cdirqsetup(LPC1766STK_SPICD_IRQ, ssp1_cdinterrupt);
#endif
return OK;
}
#endif
#endif
#endif /* CONFIG_LPC17_SSP0 || CONFIG_LPC17_SSP1 */