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[PATCH] au1xmmc: suspend/resume implementation

To: drzeus@drzeus.cx
Subject: [PATCH] au1xmmc: suspend/resume implementation
From: Manuel Lauss <mano@roarinelk.homelinux.net>
Date: Thu, 17 Jul 2008 13:07:28 +0200
Cc: linux-mips@linux-mips.org
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.16 (2007-06-09)
From: Manuel Lauss <mano@roarinelk.homelinux.net>

Basic suspend/resume support: disable peripheral on suspend and
reinit on resume.

Tested on Au1200.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
---
 drivers/mmc/host/au1xmmc.c |   54 ++++++++++++++++++++++++++++++++++---------
 1 files changed, 42 insertions(+), 12 deletions(-)

diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index 3f15eb2..99b2091 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -1043,7 +1043,7 @@ static int __devinit au1xmmc_probe(struct platform_device 
*pdev)
                goto out6;
        }
 
-       platform_set_drvdata(pdev, mmc);
+       platform_set_drvdata(pdev, host);
 
        printk(KERN_INFO DRIVER_NAME ": MMC Controller %d set up at %8.8X"
                " (mode=%s)\n", pdev->id, host->iobase,
@@ -1087,13 +1087,10 @@ out0:
 
 static int __devexit au1xmmc_remove(struct platform_device *pdev)
 {
-       struct mmc_host *mmc = platform_get_drvdata(pdev);
-       struct au1xmmc_host *host;
-
-       if (mmc) {
-               host  = mmc_priv(mmc);
+       struct au1xmmc_host *host = platform_get_drvdata(pdev);
 
-               mmc_remove_host(mmc);
+       if (host) {
+               mmc_remove_host(host->mmc);
 
 #ifdef CONFIG_LEDS_CLASS
                if (host->platdata && host->platdata->led)
@@ -1101,8 +1098,8 @@ static int __devexit au1xmmc_remove(struct 
platform_device *pdev)
 #endif
 
                if (host->platdata && host->platdata->cd_setup &&
-                   !(mmc->caps & MMC_CAP_NEEDS_POLL))
-                       host->platdata->cd_setup(mmc, 0);
+                   !(host->mmc->caps & MMC_CAP_NEEDS_POLL))
+                       host->platdata->cd_setup(host->mmc, 0);
 
                au_writel(0, HOST_ENABLE(host));
                au_writel(0, HOST_CONFIG(host));
@@ -1122,16 +1119,49 @@ static int __devexit au1xmmc_remove(struct 
platform_device *pdev)
                release_resource(host->ioarea);
                kfree(host->ioarea);
 
-               mmc_free_host(mmc);
+               mmc_free_host(host->mmc);
+               platform_set_drvdata(pdev, NULL);
        }
        return 0;
 }
 
+#ifdef CONFIG_PM
+static int au1xmmc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       struct au1xmmc_host *host = platform_get_drvdata(pdev);
+       int ret;
+
+       ret = mmc_suspend_host(host->mmc, state);
+       if (ret)
+               return ret;
+
+       au_writel(0, HOST_CONFIG2(host));
+       au_writel(0, HOST_CONFIG(host));
+       au_writel(0xffffffff, HOST_STATUS(host));
+       au_writel(0, HOST_ENABLE(host));
+       au_sync();
+
+       return 0;
+}
+
+static int au1xmmc_resume(struct platform_device *pdev)
+{
+       struct au1xmmc_host *host = platform_get_drvdata(pdev);
+
+       au1xmmc_reset_controller(host);
+
+       return mmc_resume_host(host->mmc);
+}
+#else
+#define au1xmmc_suspend NULL
+#define au1xmmc_resume NULL
+#endif
+
 static struct platform_driver au1xmmc_driver = {
        .probe         = au1xmmc_probe,
        .remove        = au1xmmc_remove,
-       .suspend       = NULL,
-       .resume        = NULL,
+       .suspend       = au1xmmc_suspend,
+       .resume        = au1xmmc_resume,
        .driver        = {
                .name  = DRIVER_NAME,
                .owner = THIS_MODULE,
-- 
1.5.6.2


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