Commit 1656fa57 authored by Pierre Ossman's avatar Pierre Ossman Committed by Russell King
Browse files

[MMC] support for mmc chip select in wbsd 



Use the chip select ios in the wbsd driver.

Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 865e9f13

drivers/mmc/wbsd.c

+50 −14
Original line number Diff line number Diff line
@@ -42,7 +42,7 @@ 
#include "wbsd.h"



#define DRIVER_NAME "wbsd"

#define DRIVER_VERSION "1.3"

#define DRIVER_VERSION "1.4"



#ifdef CONFIG_MMC_DEBUG

#define DBG(x...) \
@@ -960,8 +960,9 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) 
	struct wbsd_host* host = mmc_priv(mmc);

	u8 clk, setup, pwr;

	

	DBGF("clock %uHz busmode %u powermode %u Vdd %u\n",

		ios->clock, ios->bus_mode, ios->power_mode, ios->vdd);

	DBGF("clock %uHz busmode %u powermode %u cs %u Vdd %u\n",

		ios->clock, ios->bus_mode, ios->power_mode, ios->chip_select,

		ios->vdd);



	spin_lock_bh(&host->lock);
@@ -1003,13 +1004,11 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) 


	/*

	 * MMC cards need to have pin 1 high during init.

	 * Init time corresponds rather nicely with the bus mode.

	 * It wreaks havoc with the card detection though so

	 * that needs to be disabed.

	 * that needs to be disabled.

	 */

	setup = wbsd_read_index(host, WBSD_IDX_SETUP);

	if ((ios->power_mode == MMC_POWER_ON) &&

		(ios->bus_mode == MMC_BUSMODE_OPENDRAIN))

	if (ios->chip_select == MMC_CS_HIGH)

	{

		setup |= WBSD_DAT3_H;

		host->flags |= WBSD_FIGNORE_DETECT;
@@ -1017,7 +1016,12 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) 
	else

	{

		setup &= ~WBSD_DAT3_H;

		host->flags &= ~WBSD_FIGNORE_DETECT;



		/*

		 * We cannot resume card detection immediatly

		 * because of capacitance and delays in the chip.

		 */

		mod_timer(&host->ignore_timer, jiffies + HZ/100);

	}

	wbsd_write_index(host, WBSD_IDX_SETUP, setup);
@@ -1035,6 +1039,31 @@ static struct mmc_host_ops wbsd_ops = { 
 *                                                                           *

\*****************************************************************************/



/*

 * Helper function to reset detection ignore

 */



static void wbsd_reset_ignore(unsigned long data)

{

	struct wbsd_host *host = (struct wbsd_host*)data;



	BUG_ON(host == NULL);



	DBG("Resetting card detection ignore\n");



	spin_lock_bh(&host->lock);



	host->flags &= ~WBSD_FIGNORE_DETECT;



	/*

	 * Card status might have changed during the

	 * blackout.

	 */

	tasklet_schedule(&host->card_tasklet);



	spin_unlock_bh(&host->lock);

}



/*

 * Helper function for card detection

 */
@@ -1097,7 +1126,7 @@ static void wbsd_tasklet_card(unsigned long param) 
			 * Delay card detection to allow electrical connections

			 * to stabilise.

			 */

			mod_timer(&host->timer, jiffies + HZ/2);

			mod_timer(&host->detect_timer, jiffies + HZ/2);

		}

		

		spin_unlock(&host->lock);
@@ -1124,6 +1153,8 @@ static void wbsd_tasklet_card(unsigned long param) 


		mmc_detect_change(host->mmc);

	}

	else

		spin_unlock(&host->lock);

}



static void wbsd_tasklet_fifo(unsigned long param)
@@ -1328,11 +1359,15 @@ static int __devinit wbsd_alloc_mmc(struct device* dev) 
	spin_lock_init(&host->lock);

	

	/*

	 * Set up detection timer

	 * Set up timers

	 */

	init_timer(&host->timer);

	host->timer.data = (unsigned long)host;

	host->timer.function = wbsd_detect_card;

	init_timer(&host->detect_timer);

	host->detect_timer.data = (unsigned long)host;

	host->detect_timer.function = wbsd_detect_card;



	init_timer(&host->ignore_timer);

	host->ignore_timer.data = (unsigned long)host;

	host->ignore_timer.function = wbsd_reset_ignore;

	

	/*

	 * Maximum number of segments. Worst case is one sector per segment
@@ -1370,7 +1405,8 @@ static void __devexit wbsd_free_mmc(struct device* dev) 
	host = mmc_priv(mmc);

	BUG_ON(host == NULL);

	

	del_timer_sync(&host->timer);

	del_timer_sync(&host->ignore_timer);

	del_timer_sync(&host->detect_timer);

	

	mmc_free_host(mmc);

drivers/mmc/wbsd.h

+2 −1
Original line number Diff line number Diff line
@@ -181,5 +181,6 @@ struct wbsd_host 
	struct tasklet_struct	finish_tasklet;

	struct tasklet_struct	block_tasklet;

	

	struct timer_list	timer;		/* Card detection timer */

	struct timer_list	detect_timer;	/* Card detection timer */

	struct timer_list	ignore_timer;	/* Ignore detection timer */

};