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Subject[PATCH 10/32] omap_hsmmc: make use of new enable/disable interface
From 9b89eb8712def837ddfd40819ae578656ea893cb Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@nokia.com>
Date: Thu, 23 Apr 2009 10:01:29 +0300
Subject: [PATCH] omap_hsmmc: make use of new enable/disable interface

For the moment enable / disable just turns the fclk
on and off.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
---
drivers/mmc/host/omap_hsmmc.c | 68 +++++++++++++++++++++++++++++++++++------
1 files changed, 58 insertions(+), 10 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index cbd8376..0fded10 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -598,7 +598,9 @@ static void mmc_omap_detect(struct work_struct *work)
if (host->carddetect) {
mmc_detect_change(host->mmc, (HZ * 200) / 1000);
} else {
+ mmc_host_enable(host->mmc);
mmc_omap_reset_controller_fsm(host, SRD);
+ mmc_host_lazy_disable(host->mmc);
mmc_detect_change(host->mmc, (HZ * 50) / 1000);
}
}
@@ -811,6 +813,27 @@ mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
return 0;
}

+static int omap_mmc_enable(struct mmc_host *mmc)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+ int err;
+
+ err = clk_enable(host->fclk);
+ if (err)
+ return err;
+ dev_dbg(mmc_dev(host->mmc), "mmc_fclk: enabled\n");
+ return 0;
+}
+
+static int omap_mmc_disable(struct mmc_host *mmc, int lazy)
+{
+ struct mmc_omap_host *host = mmc_priv(mmc);
+
+ clk_disable(host->fclk);
+ dev_dbg(mmc_dev(host->mmc), "mmc_fclk: disabled\n");
+ return 0;
+}
+
/*
* Request function. for read/write operation
*/
@@ -834,6 +857,8 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
unsigned long timeout;
u32 con;

+ mmc_host_enable(host->mmc);
+
switch (ios->power_mode) {
case MMC_POWER_OFF:
mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0);
@@ -912,6 +937,8 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
OMAP_HSMMC_WRITE(host->base, CON,
OMAP_HSMMC_READ(host->base, CON) | OD);
+
+ mmc_host_lazy_disable(host->mmc);
}

static int omap_hsmmc_get_cd(struct mmc_host *mmc)
@@ -962,6 +989,8 @@ static void omap_hsmmc_init(struct mmc_omap_host *host)
}

static struct mmc_host_ops mmc_omap_ops = {
+ .enable = omap_mmc_enable,
+ .disable = omap_mmc_disable,
.request = omap_mmc_request,
.set_ios = omap_mmc_set_ios,
.get_cd = omap_hsmmc_get_cd,
@@ -976,7 +1005,16 @@ static int mmc_regs_show(struct seq_file *s, void *data)
struct mmc_host *mmc = s->private;
struct mmc_omap_host *host = mmc_priv(mmc);

- seq_printf(s, "mmc%d regs:\n", mmc->index);
+ seq_printf(s, "mmc%d:\n"
+ " enabled:\t%d\n"
+ " nesting_cnt:\t%d\n"
+ "\nregs:\n",
+ mmc->index, mmc->enabled ? 1 : 0, mmc->nesting_cnt);
+
+ if (clk_enable(host->fclk) != 0) {
+ seq_printf(s, "can't read the regs\n");
+ goto err;
+ }

seq_printf(s, "SYSCONFIG:\t0x%08x\n",
OMAP_HSMMC_READ(host->base, SYSCONFIG));
@@ -992,6 +1030,9 @@ static int mmc_regs_show(struct seq_file *s, void *data)
OMAP_HSMMC_READ(host->base, ISE));
seq_printf(s, "CAPA:\t\t0x%08x\n",
OMAP_HSMMC_READ(host->base, CAPA));
+
+ clk_disable(host->fclk);
+err:
return 0;
}

@@ -1092,14 +1133,16 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
goto err1;
}

- if (clk_enable(host->fclk) != 0) {
+ mmc->caps |= MMC_CAP_DISABLE;
+ mmc_set_disable_delay(mmc, msecs_to_jiffies(100));
+ if (mmc_host_enable(host->mmc) != 0) {
clk_put(host->iclk);
clk_put(host->fclk);
goto err1;
}

if (clk_enable(host->iclk) != 0) {
- clk_disable(host->fclk);
+ mmc_host_disable(host->mmc);
clk_put(host->iclk);
clk_put(host->fclk);
goto err1;
@@ -1190,6 +1233,8 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
OMAP_HSMMC_WRITE(host->base, ISE, INT_EN_MASK);
OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK);

+ mmc_host_lazy_disable(host->mmc);
+
mmc_add_host(mmc);

if (host->pdata->slots[host->slot_id].name != NULL) {
@@ -1218,7 +1263,7 @@ err_irq_cd:
err_irq_cd_init:
free_irq(host->irq, host);
err_irq:
- clk_disable(host->fclk);
+ mmc_host_disable(host->mmc);
clk_disable(host->iclk);
clk_put(host->fclk);
clk_put(host->iclk);
@@ -1243,6 +1288,7 @@ static int omap_mmc_remove(struct platform_device *pdev)
struct resource *res;

if (host) {
+ mmc_host_enable(host->mmc);
mmc_remove_host(host->mmc);
if (host->pdata->cleanup)
host->pdata->cleanup(&pdev->dev);
@@ -1251,7 +1297,7 @@ static int omap_mmc_remove(struct platform_device *pdev)
free_irq(mmc_slot(host).card_detect_irq, host);
flush_scheduled_work();

- clk_disable(host->fclk);
+ mmc_host_disable(host->mmc);
clk_disable(host->iclk);
clk_put(host->fclk);
clk_put(host->iclk);
@@ -1282,6 +1328,7 @@ static int omap_mmc_suspend(struct platform_device *pdev, pm_message_t state)
return 0;

if (host) {
+ mmc_host_enable(host->mmc);
ret = mmc_suspend_host(host->mmc, state);
if (ret == 0) {
host->suspended = 1;
@@ -1300,10 +1347,11 @@ static int omap_mmc_suspend(struct platform_device *pdev, pm_message_t state)

OMAP_HSMMC_WRITE(host->base, HCTL,
OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
- clk_disable(host->fclk);
+ mmc_host_disable(host->mmc);
clk_disable(host->iclk);
clk_disable(host->dbclk);
- }
+ } else
+ mmc_host_disable(host->mmc);

}
return ret;
@@ -1320,13 +1368,12 @@ static int omap_mmc_resume(struct platform_device *pdev)

if (host) {

- ret = clk_enable(host->fclk);
- if (ret)
+ if (mmc_host_enable(host->mmc) != 0)
goto clk_en_err;

ret = clk_enable(host->iclk);
if (ret) {
- clk_disable(host->fclk);
+ mmc_host_disable(host->mmc);
clk_put(host->fclk);
goto clk_en_err;
}
@@ -1348,6 +1395,7 @@ static int omap_mmc_resume(struct platform_device *pdev)
ret = mmc_resume_host(host->mmc);
if (ret == 0)
host->suspended = 0;
+ mmc_host_lazy_disable(host->mmc);
}

return ret;
--
1.5.6.3


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