From 16defbb2bd9478f9e5384b9722f20a694e6bae41 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 14 Mar 2009 15:52:42 +0000 Subject: nuke obsolete kernel stuff SVN-Revision: 14875 --- ...-fix-force-sdcard-clk-off-when-idle.patch.patch | 240 --------------------- 1 file changed, 240 deletions(-) delete mode 100755 target/linux/s3c24xx/patches-2.6.26/1214-fix-force-sdcard-clk-off-when-idle.patch.patch (limited to 'target/linux/s3c24xx/patches-2.6.26/1214-fix-force-sdcard-clk-off-when-idle.patch.patch') diff --git a/target/linux/s3c24xx/patches-2.6.26/1214-fix-force-sdcard-clk-off-when-idle.patch.patch b/target/linux/s3c24xx/patches-2.6.26/1214-fix-force-sdcard-clk-off-when-idle.patch.patch deleted file mode 100755 index 13dc940..0000000 --- a/target/linux/s3c24xx/patches-2.6.26/1214-fix-force-sdcard-clk-off-when-idle.patch.patch +++ /dev/null @@ -1,240 +0,0 @@ -From ee83ea40a3a1d1cb6447fdd345384d9cabf21c83 Mon Sep 17 00:00:00 2001 -From: Andy Green -Date: Fri, 25 Jul 2008 23:06:20 +0100 -Subject: [PATCH] fix-force-sdcard-clk-off-when-idle.patch - -Existing Glamo bit for stopping SD Card Clock when there is no -transfer taking place does not work. This patch adds stuff around -the transfer code to force the SD clock up when something is going on -and down when it is idle. This'll save a little power and noise ;-) - -I tested it briefly and was able to SD Boot normally on Sandisk 512M. -Wider testing is appreciated. - -Signed-off-by: Andy Green ---- - drivers/mfd/glamo/glamo-mci.c | 126 +++++++++++++++++++++++++++++------------ - 1 files changed, 89 insertions(+), 37 deletions(-) - -diff --git a/drivers/mfd/glamo/glamo-mci.c b/drivers/mfd/glamo/glamo-mci.c -index 37e3d3c..b53827e 100644 ---- a/drivers/mfd/glamo/glamo-mci.c -+++ b/drivers/mfd/glamo/glamo-mci.c -@@ -20,6 +20,7 @@ - #include - #include - #include -+#include - - #include - #include -@@ -32,6 +33,7 @@ - /* from glamo-core.c */ - extern struct glamo_mci_pdata glamo_mci_def_pdata; - -+static spinlock_t clock_lock; - - #define DRIVER_NAME "glamo-mci" - #define RESSIZE(ressource) (((ressource)->end - (ressource)->start) + 1) -@@ -164,6 +166,67 @@ static int do_pio_write(struct glamo_mci_host *host) - return err; - } - -+static void __glamo_mci_fix_card_div(struct glamo_mci_host *host, int div) -+{ -+ unsigned long flags; -+ -+ spin_lock_irqsave(&clock_lock, flags); -+ -+ if (div < 0) { -+ /* stop clock - remove clock from divider input */ -+ writew(readw(glamo_mci_def_pdata.pglamo->base + -+ GLAMO_REG_CLOCK_GEN5_1) & (~GLAMO_CLOCK_GEN51_EN_DIV_TCLK), -+ glamo_mci_def_pdata.pglamo->base + GLAMO_REG_CLOCK_GEN5_1); -+ } else { -+ /* set the nearest prescaler factor -+ * -+ * register shared with SCLK divisor -- no chance of race because -+ * we don't use sensor interface -+ */ -+ writew_dly((readw(glamo_mci_def_pdata.pglamo->base + -+ GLAMO_REG_CLOCK_GEN8) & 0xff00) | div, -+ glamo_mci_def_pdata.pglamo->base + GLAMO_REG_CLOCK_GEN8); -+ /* enable clock to divider input */ -+ writew_dly(readw(glamo_mci_def_pdata.pglamo->base + -+ GLAMO_REG_CLOCK_GEN5_1) | GLAMO_CLOCK_GEN51_EN_DIV_TCLK, -+ glamo_mci_def_pdata.pglamo->base + GLAMO_REG_CLOCK_GEN5_1); -+ } -+ -+ spin_unlock_irqrestore(&clock_lock, flags); -+} -+ -+static int __glamo_mci_set_card_clock(struct glamo_mci_host *host, int freq, -+ int *division) -+{ -+ int div = 0; -+ int real_rate = 0; -+ -+ if (freq) { -+ /* Set clock */ -+ for (div = 0; div < 256; div++) { -+ real_rate = host->clk_rate / (div + 1); -+ if (real_rate <= freq) -+ break; -+ } -+ if (div > 255) -+ div = 255; -+ -+ if (division) -+ *division = div; -+ -+ __glamo_mci_fix_card_div(host, div); -+ -+ } else { -+ /* stop clock */ -+ if (division) -+ *division = 0xff; -+ -+ __glamo_mci_fix_card_div(host, -1); /* clock off */ -+ } -+ -+ return real_rate; -+} -+ - static void glamo_mci_irq(unsigned int irq, struct irq_desc *desc) - { - struct glamo_mci_host *host = (struct glamo_mci_host *) -@@ -212,6 +275,10 @@ static void glamo_mci_irq(unsigned int irq, struct irq_desc *desc) - glamo_mci_send_request(host->mmc); - host->cmd_is_stop = 0; - } -+ -+ /* clock off */ -+ __glamo_mci_fix_card_div(host, -1); -+ - done: - host->complete_what = COMPLETION_NONE; - host->mrq = NULL; -@@ -441,8 +508,11 @@ static void glamo_mci_send_request(struct mmc_host *mmc) - cmd->opcode, cmd->arg, cmd->data, cmd->mrq->stop, - cmd->flags); - -+ /* resume requested clock rate */ -+ __glamo_mci_fix_card_div(host, host->clk_div); -+ - if (glamo_mci_send_command(host, cmd)) -- return; -+ goto bail; - /* - * we must spin until response is ready or timed out - * -- we don't get interrupts unless there is a bulk rx -@@ -464,7 +534,7 @@ static void glamo_mci_send_request(struct mmc_host *mmc) - cmd->error = -EILSEQ; - - if (host->cmd_is_stop) -- return; -+ goto bail; - - if (cmd->error) { - dev_err(&host->pdev->dev, "Error after cmd: 0x%x\n", status); -@@ -516,10 +586,12 @@ static void glamo_mci_send_request(struct mmc_host *mmc) - if (cmd->data->error) - cmd->data->error = -ETIMEDOUT; - dev_err(&host->pdev->dev, "Payload timeout\n"); -- return; -+ goto bail; - } - -- /* yay we are an interrupt controller! -- call the ISR */ -+ /* yay we are an interrupt controller! -- call the ISR -+ * it will stop clock to card -+ */ - glamo_mci_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), - irq_desc + IRQ_GLAMO(GLAMO_IRQIDX_MMC)); - } -@@ -529,6 +601,12 @@ done: - host->complete_what = COMPLETION_NONE; - host->mrq = NULL; - mmc_request_done(host->mmc, cmd->mrq); -+ return; -+ -+bail: -+ /* stop the clock to card */ -+ __glamo_mci_fix_card_div(host, -1); -+ return; - } - - static void glamo_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) -@@ -556,11 +634,12 @@ static void glamo_mci_reset(struct glamo_mci_host *host) - glamo_mci_def_pdata.pglamo->base + GLAMO_REG_CLOCK_MMC); - } - -+ - static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) - { - struct glamo_mci_host *host = mmc_priv(mmc); -- int mci_psc = 0; - int n = 0; -+ int div; - - /* Set power */ - switch(ios->power_mode) { -@@ -590,43 +669,15 @@ static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) - } - host->power_mode_current = ios->power_mode; - -- /* Set clock */ --/* if (ios->clock) { */ -- for (mci_psc = 0; mci_psc < 256; mci_psc++) { -- host->real_rate = host->clk_rate / (mci_psc + 1); -- if (host->real_rate <= ios->clock) -- break; -- } -- if (mci_psc > 255) -- mci_psc = 255; -- host->clk_div = mci_psc; -- /* set the nearest prescaler factor -- * -- * register shared with SCLK divisor -- no chance of race because -- * we don't use sensor interface -- */ -- writew_dly((readw(glamo_mci_def_pdata.pglamo->base + -- GLAMO_REG_CLOCK_GEN8) & 0xff00) | host->clk_div, -- glamo_mci_def_pdata.pglamo->base + GLAMO_REG_CLOCK_GEN8); -- /* enable clock to divider input */ -- writew_dly(readw(glamo_mci_def_pdata.pglamo->base + -- GLAMO_REG_CLOCK_GEN5_1) | GLAMO_CLOCK_GEN51_EN_DIV_TCLK, -- glamo_mci_def_pdata.pglamo->base + GLAMO_REG_CLOCK_GEN5_1); --#if 0 -- } else { /* stop clock */ -- host->real_rate = 0; -- /* remove clock from divider input */ -- writew(readw(glamo_mci_def_pdata.pglamo->base + -- GLAMO_REG_CLOCK_GEN5_1) & (~GLAMO_CLOCK_GEN51_EN_DIV_TCLK), -- glamo_mci_def_pdata.pglamo->base + GLAMO_REG_CLOCK_GEN5_1); -- } --#endif -+ host->real_rate = __glamo_mci_set_card_clock(host, ios->clock, &div); -+ host->clk_div = div; -+ - if ((ios->power_mode == MMC_POWER_ON) || - (ios->power_mode == MMC_POWER_UP)) { - dev_info(&host->pdev->dev, - "powered (vdd = %d) clk: %lukHz div=%d (req: %ukHz). " - "Bus width=%d\n",ios->vdd, -- host->real_rate / 1000, mci_psc, -+ host->real_rate / 1000, host->real_rate, - ios->clock / 1000, ios->bus_width); - } else - dev_info(&host->pdev->dev, "glamo_mci_set_ios: power down.\n"); -@@ -856,6 +907,7 @@ static struct platform_driver glamo_mci_driver = - - static int __init glamo_mci_init(void) - { -+ spin_lock_init(&clock_lock); - platform_driver_register(&glamo_mci_driver); - return 0; - } --- -1.5.6.3 - -- cgit v1.1