diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.26/1218-debug-add-glamo-drive-strength-module-param.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches-2.6.26/1218-debug-add-glamo-drive-strength-module-param.patch.patch | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git 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 deleted file mode 100755 index dd0fcff816..0000000000 --- a/target/linux/s3c24xx/patches-2.6.26/1218-debug-add-glamo-drive-strength-module-param.patch.patch +++ /dev/null @@ -1,167 +0,0 @@ -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 - |