changed Makefile and profiles, added patches for kernel 2.6.24 (stable-branch of Openmoko)

SVN-Revision: 13613

1 files changed, 211 insertions, 0 deletions

diff --git a/target/linux/s3c24xx/patches-2.6.24/1322-fix-gta01-s3c-mci-stop-clock-when-idle.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1322-fix-gta01-s3c-mci-stop-clock-when-idle.patch.patch
new file mode 100644
index 0000000..7717199
--- /dev/null
+++ b/target/linux/s3c24xx/patches-2.6.24/1322-fix-gta01-s3c-mci-stop-clock-when-idle.patch.patch
@@ -0,0 +1,211 @@
+From ff31834cfaac386f94ddd65fab8b87d090c69bcc Mon Sep 17 00:00:00 2001
+From: Mike Westerhof <mwester@dls.net>
+Date: Thu, 13 Nov 2008 20:38:35 +0000
+Subject: [PATCH] fix-gta01-s3c-mci-stop-clock-when-idle.patch
+
+This patch, based on the work done by Andy Green for the Glamo mci
+driver, makes sure that the SD clock only runs during data transfers.
+This can be overridden on the kernel command line if desired.  Also
+added is the ability for the maximum SD clock speed to be limited.
+
+Signed-off-by: Mike Westerhof (mwester@dls.net)
+---
+ drivers/mmc/host/s3cmci.c |  113 +++++++++++++++++++++++++++++++++++++++++++--
+ 1 files changed, 109 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
+index edba055..8f88721 100644
+--- a/drivers/mmc/host/s3cmci.c
++++ b/drivers/mmc/host/s3cmci.c
+@@ -15,6 +15,8 @@
+ #include <linux/mmc/host.h>
+ #include <linux/platform_device.h>
+ #include <linux/irq.h>
++#include <linux/delay.h>
++#include <linux/spinlock.h>
+ 
+ #include <asm/dma.h>
+ #include <asm/dma-mapping.h>
+@@ -29,6 +31,37 @@
+ 
+ #define DRIVER_NAME "s3c-mci"
+ 
++static spinlock_t clock_lock;
++
++/*
++ * Max SD clock rate (in Hz)
++ *
++ * you can override this on the kernel command line using
++ *
++ * s3cmci.sd_max_clk=10000000
++ *
++ * for example.
++ */
++
++static int sd_max_clk = 25000000;
++module_param(sd_max_clk, int, 0644);
++
++/*
++ * SD allow SD clock to run while idle
++ *
++ * you can override this on kernel commandline using
++ *
++ *  s3cmci.sd_idleclk=0
++ *
++ * for example.
++ */
++
++static int sd_idleclk;	 /* disallow idle clock by default */
++module_param(sd_idleclk, int, 0644);
++
++/* used to stash real idleclk state in suspend: we force it to run in there */
++static int suspend_sd_idleclk;
++
+ enum dbg_channels {
+ 	dbg_err   = (1 << 0),
+ 	dbg_debug = (1 << 1),
+@@ -368,6 +401,40 @@ static void pio_tasklet(unsigned long data)
+ 		enable_irq(host->irq);
+ }
+ 
++static void __s3cmci_enable_clock(struct s3cmci_host *host)
++{
++	u32 mci_con;
++	unsigned long flags;
++
++	/* enable the clock if clock rate is > 0 */
++	if (host->real_rate) {
++		spin_lock_irqsave(&clock_lock, flags);
++
++		mci_con = readl(host->base + S3C2410_SDICON);
++		mci_con |= S3C2410_SDICON_CLOCKTYPE;
++		writel(mci_con, host->base + S3C2410_SDICON);
++
++		spin_unlock_irqrestore(&clock_lock, flags);
++	}
++}
++
++static void __s3cmci_disable_clock(struct s3cmci_host *host)
++{
++	u32 mci_con;
++	unsigned long flags;
++
++	if (!sd_idleclk) {
++		spin_lock_irqsave(&clock_lock, flags);
++
++		mci_con = readl(host->base + S3C2410_SDICON);
++		mci_con &= ~S3C2410_SDICON_CLOCKTYPE;
++		writel(mci_con, host->base + S3C2410_SDICON);
++
++		spin_unlock_irqrestore(&clock_lock, flags);
++	}
++}
++
++
+ /*
+  * ISR for SDI Interface IRQ
+  * Communication between driver and ISR works as follows:
+@@ -749,6 +816,7 @@ static void finalize_request(struct s3cmci_host *host)
+ 	}
+ 
+ request_done:
++	__s3cmci_disable_clock(host);
+ 	host->complete_what = COMPLETION_NONE;
+ 	host->mrq = NULL;
+ 	mmc_request_done(host->mmc, mrq);
+@@ -1005,6 +1073,7 @@ static void s3cmci_send_request(struct mmc_host *mmc)
+ 
+ 	}
+ 
++	__s3cmci_enable_clock(host);
+ 	s3cmci_send_command(host, cmd);
+ 	enable_irq(host->irq);
+ }
+@@ -1087,14 +1156,30 @@ static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+ 	if ((ios->power_mode == MMC_POWER_ON)
+ 		|| (ios->power_mode == MMC_POWER_UP)) {
+ 
+-		dbg(host, dbg_conf, "running at %lukHz (requested: %ukHz).\n",
+-		    host->real_rate/1000, ios->clock/1000);
++		dbg(host, dbg_conf,
++		    "powered (vdd: %d), clk: %lukHz div=%lu (req: %ukHz),"
++		    " bus width: %d\n", ios->vdd, host->real_rate / 1000,
++		    host->clk_div * (host->prescaler + 1),
++		    ios->clock / 1000, ios->bus_width);
++
++		/* After power-up, we need to give the card 74 clocks to
++		 * initialize, so sleep just a moment before we disable
++		 * the clock again.
++		 */
++		if (ios->clock)
++			msleep(1);
++
+ 	} else {
+ 		dbg(host, dbg_conf, "powered down.\n");
+ 	}
+ 
+ 	host->bus_width = ios->bus_width;
+ 
++	/* No need to run the clock until we have data to move */
++	if (!sd_idleclk) {
++		__s3cmci_disable_clock(host);
++		dbg(host, dbg_conf, "SD clock disabled when idle.\n");
++	}
+ }
+ 
+ static void s3cmci_reset(struct s3cmci_host *host)
+@@ -1267,7 +1352,7 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
+ 	mmc->ocr_avail	= host->pdata->ocr_avail;
+ 	mmc->caps	= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
+ 	mmc->f_min 	= host->clk_rate / (host->clk_div * 256);
+-	mmc->f_max 	= host->clk_rate / host->clk_div;
++	mmc->f_max 	= sd_max_clk;
+ 
+ 	mmc->max_blk_count	= 4095;
+ 	mmc->max_blk_size	= 4095;
+@@ -1354,14 +1439,33 @@ static int s3cmci_probe_2440(struct platform_device *dev)
+ static int s3cmci_suspend(struct platform_device *dev, pm_message_t state)
+ {
+ 	struct mmc_host *mmc = platform_get_drvdata(dev);
++	struct s3cmci_host *host = mmc_priv(mmc);
++	int ret;
++
++	/* Ensure clock is running so it will be running on resume */
++	__s3cmci_enable_clock(host);
+ 
+-	return  mmc_suspend_host(mmc, state);
++	/* We will do more commands, make sure the clock stays running,
++	 * and save our state so that we can restore it on resume.
++	 */
++	suspend_sd_idleclk = sd_idleclk;
++	sd_idleclk = 1;
++
++	ret = mmc_suspend_host(mmc, state);
++
++	/* so that when we resume, we use any modified max rate */
++	mmc->f_max = sd_max_clk;
++
++	return ret;
+ }
+ 
+ static int s3cmci_resume(struct platform_device *dev)
+ {
+ 	struct mmc_host *mmc = platform_get_drvdata(dev);
+ 
++	/* Put the sd_idleclk state back to what it was */
++	sd_idleclk = suspend_sd_idleclk;
++
+ 	return mmc_resume_host(mmc);
+ }
+ 
+@@ -1398,6 +1502,7 @@ static struct platform_driver s3cmci_driver_2440 = {
+ 
+ static int __init s3cmci_init(void)
+ {
++	spin_lock_init(&clock_lock);
+ 	platform_driver_register(&s3cmci_driver_2410);
+ 	platform_driver_register(&s3cmci_driver_2412);
+ 	platform_driver_register(&s3cmci_driver_2440);
+-- 
+1.5.6.5
+