change prefix for kernelpatchbase 2.6.26

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13619 3c298f89-4303-0410-b956-a3cf2f4a3e73
2025-04-21 12:27:27 +03:00 · 2008-12-13 01:54:56 +00:00
parent 9fa649271d
commit a95f9f92e2
255 changed files with 0 additions and 0 deletions
--- a/target/linux/s3c24xx/patches-2.6.26/1218-debug-add-glamo-drive-strength-module-param.patch.patch
+++ b/target/linux/s3c24xx/patches-2.6.26/1218-debug-add-glamo-drive-strength-module-param.patch.patch
@@ -0,0 +1,167 @@
+From e1bc0be9f95559ae154d24b353e404c781798da1 Mon Sep 17 00:00:00 2001
+From: Andy Green <andy@openmoko.com>
+Date: Fri, 25 Jul 2008 23:06:20 +0100
+Subject: [PATCH] debug-add-glamo-drive-strength-module-param.patch
+ Suggested-by: Werner Almesberger <werner@openmoko.org>
+
+This patch allows users to control two additional settings
+in Glamo MCI driver from kernel commandline or module
+parameters.
+
+
+First is Glamo drive strength on SD IOs including CLK.
+This ranges from 0 (weakest) to 3 (strongest).
+
+echo 0 > /sys/module/glamo_mci/parameters/sd_drive
+
+(Changes to this take effect on next SD Card transaction)
+
+or, from kernel commandline
+
+glamo_mci.sd_drive=0
+
+On tests here with 0 strength, communication to SD card
+(shipped 512MB Sandisk) seemed fine, and a dd of 10MB
+urandom had the same md5 when written to cache as after
+a reboot.  I set the default to 2.
+
+
+Second is whether we allow SD_CLK when the SD interface
+is idle.
+
+# stop the clock when we are idle (default)
+echo 0 > /sys/module/glamo_mci/parameters/sd_idleclk
+
+# run the SD clock all the time
+echo 1 > /sys/module/glamo_mci/parameters/sd_idleclk
+
+(changes take effect on next SD Card transaction)
+
+From kernel commandline, eg:
+
+glamo_mci.sd_idleclk=1
+
+Normally you don't want to run the SD Clock all the time.
+
+
+Signed-off-by: Andy Green <andy@openmoko.com>
+---
+ drivers/mfd/glamo/glamo-mci.c |   59 +++++++++++++++++++++++++++++++---------
+ 1 files changed, 45 insertions(+), 14 deletions(-)
+
+diff --git a/drivers/mfd/glamo/glamo-mci.c b/drivers/mfd/glamo/glamo-mci.c
+index 93f4074..4615033 100644
+--- a/drivers/mfd/glamo/glamo-mci.c
+++ b/drivers/mfd/glamo/glamo-mci.c
+@@ -56,6 +56,32 @@ static void glamo_mci_send_request(struct mmc_host *mmc);
+ static int sd_max_clk = 50000000 / 3;
+ module_param(sd_max_clk, int, 0644);
+ 
+/*
+ * SD Signal drive strength
+ *
+ * you can override this on kernel commandline using
+ *
+ *   glamo_mci.sd_drive=0
+ *
+ * for example
+ */
+
+static int sd_drive = 2;
+module_param(sd_drive, int, 0644);
+
+/*
+ * SD allow SD clock to run while idle
+ *
+ * you can override this on kernel commandline using
+ *
+ *   glamo_mci.sd_idleclk=0
+ *
+ * for example
+ */
+
+static int sd_idleclk = 0; /* disallow idle clock by default */
+module_param(sd_idleclk, int, 0644);
+
+ 
+ 
+ unsigned char CRC7(u8 * pu8, int cnt)
+@@ -239,7 +265,9 @@ static int __glamo_mci_set_card_clock(struct glamo_mci_host *host, int freq,
+ 		if (division)
+ 			*division = 0xff;
+ 
+-		__glamo_mci_fix_card_div(host, -1); /* clock off */
+		if (!sd_idleclk)
+			/* clock off */
+			__glamo_mci_fix_card_div(host, -1);
+ 	}
+ 
+ 	return real_rate;
+@@ -294,8 +322,9 @@ static void glamo_mci_irq(unsigned int irq, struct irq_desc *desc)
+ 		host->cmd_is_stop = 0;
+ 	}
+ 
+-	/* clock off */
+-	__glamo_mci_fix_card_div(host, -1);
+	if (!sd_idleclk)
+		/* clock off */
+		__glamo_mci_fix_card_div(host, -1);
+ 
+ done:
+ 	host->complete_what = COMPLETION_NONE;
+@@ -428,12 +457,10 @@ static int glamo_mci_send_command(struct glamo_mci_host *host,
+ 	} else
+ 		writew(0xfff, host->base + GLAMO_REG_MMC_TIMEOUT);
+ 
+-	/* Generate interrupt on txfer; drive strength max */
+-	writew_dly((readw_dly(host->base + GLAMO_REG_MMC_BASIC) & 0xfe) |
+	/* Generate interrupt on txfer */
+	writew_dly((readw_dly(host->base + GLAMO_REG_MMC_BASIC) & 0x3e) |
+ 		   0x0800 | GLAMO_BASIC_MMC_NO_CLK_RD_WAIT |
+-		   GLAMO_BASIC_MMC_EN_COMPL_INT |
+-		   GLAMO_BASIC_MMC_EN_DR_STR0 |
+-		   GLAMO_BASIC_MMC_EN_DR_STR1,
+		   GLAMO_BASIC_MMC_EN_COMPL_INT | (sd_drive << 6),
+ 		   host->base + GLAMO_REG_MMC_BASIC);
+ 
+ 	/* send the command out on the wire */
+@@ -620,8 +647,9 @@ done:
+ 	host->mrq = NULL;
+ 	mmc_request_done(host->mmc, cmd->mrq);
+ bail:
+-	/* stop the clock to card */
+-	__glamo_mci_fix_card_div(host, -1);
+	if (!sd_idleclk)
+		/* stop the clock to card */
+		__glamo_mci_fix_card_div(host, -1);
+ }
+ 
+ static void glamo_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
+@@ -687,8 +715,9 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+ 	host->real_rate = __glamo_mci_set_card_clock(host, ios->clock, &div);
+ 	host->clk_div = div;
+ 
+-	/* stop the clock to card, because we are idle until transfer */
+-	__glamo_mci_fix_card_div(host, -1);
+	if (!sd_idleclk)
+		/* stop the clock to card, because we are idle until transfer */
+		__glamo_mci_fix_card_div(host, -1);
+ 
+ 	if ((ios->power_mode == MMC_POWER_ON) ||
+ 	    (ios->power_mode == MMC_POWER_UP)) {
+@@ -705,8 +734,10 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+ 	if (host->bus_width == MMC_BUS_WIDTH_4)
+ 		n = GLAMO_BASIC_MMC_EN_4BIT_DATA;
+ 	writew_dly((readw_dly(host->base + GLAMO_REG_MMC_BASIC) &
+-					  (~GLAMO_BASIC_MMC_EN_4BIT_DATA)) | n,
+-					      host->base + GLAMO_REG_MMC_BASIC);
+					  (~(GLAMO_BASIC_MMC_EN_4BIT_DATA |
+					     GLAMO_BASIC_MMC_EN_DR_STR0 |
+					     GLAMO_BASIC_MMC_EN_DR_STR1))) | n |
+			       sd_drive << 6, host->base + GLAMO_REG_MMC_BASIC);
+ }
+ 
+ 
+-- 
+1.5.6.3
+