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Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1322-fix-gta01-s3c-mci-stop-clock-when-idle.patch.patch')
-rw-r--r--target/linux/s3c24xx/patches-2.6.24/1322-fix-gta01-s3c-mci-stop-clock-when-idle.patch.patch211
1 files changed, 0 insertions, 211 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
deleted file mode 100644
index 7717199..0000000
--- a/target/linux/s3c24xx/patches-2.6.24/1322-fix-gta01-s3c-mci-stop-clock-when-idle.patch.patch
+++ /dev/null
@@ -1,211 +0,0 @@
-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
-
generated by cgit v1.1 at 2024-11-19 02:24:55 +0000