Merge branch 'consolidate-clksrc-i8253' of master.kernel.org:~rmk/linux-2.6-arm into timers/clocksource

Conflicts:
	arch/ia64/kernel/cyclone.c
	arch/mips/kernel/i8253.c
	arch/x86/kernel/i8253.c

Reason: Resolve conflicts so further cleanups do not conflict further

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

12 files changed, 229 insertions, 20 deletions

diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index 86b47911933..639501970b4 100644
--- a/drivers/mmc/core/Makefile
+++ b/drivers/mmc/core/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_MMC)		+= mmc_core.o
 mmc_core-y			:= core.o bus.o host.o \
 				   mmc.o mmc_ops.o sd.o sd_ops.o \
 				   sdio.o sdio_ops.o sdio_bus.o \
-				   sdio_cis.o sdio_io.o sdio_irq.o
+				   sdio_cis.o sdio_io.o sdio_irq.o \
+				   quirks.o
 
 mmc_core-$(CONFIG_DEBUG_FS)	+= debugfs.o
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 63667a8f140..d6d62fd07ee 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -284,6 +284,7 @@ int mmc_add_card(struct mmc_card *card)
 		type = "SD-combo";
 		if (mmc_card_blockaddr(card))
 			type = "SDHC-combo";
+		break;
 	default:
 		type = "?";
 		break;
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 6625c057be0..1f453acc868 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -167,8 +167,6 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 
 	WARN_ON(!host->claimed);
 
-	led_trigger_event(host->led, LED_FULL);
-
 	mrq->cmd->error = 0;
 	mrq->cmd->mrq = mrq;
 	if (mrq->data) {
@@ -194,6 +192,7 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 		}
 	}
 	mmc_host_clk_ungate(host);
+	led_trigger_event(host->led, LED_FULL);
 	host->ops->request(host, mrq);
 }
 
@@ -528,7 +527,14 @@ int mmc_try_claim_host(struct mmc_host *host)
 }
 EXPORT_SYMBOL(mmc_try_claim_host);
 
-static void mmc_do_release_host(struct mmc_host *host)
+/**
+ *	mmc_do_release_host - release a claimed host
+ *	@host: mmc host to release
+ *
+ *	If you successfully claimed a host, this function will
+ *	release it again.
+ */
+void mmc_do_release_host(struct mmc_host *host)
 {
 	unsigned long flags;
 
@@ -543,6 +549,7 @@ static void mmc_do_release_host(struct mmc_host *host)
 		wake_up(&host->wq);
 	}
 }
+EXPORT_SYMBOL(mmc_do_release_host);
 
 void mmc_host_deeper_disable(struct work_struct *work)
 {
@@ -1002,6 +1009,13 @@ static void mmc_power_off(struct mmc_host *host)
 {
 	host->ios.clock = 0;
 	host->ios.vdd = 0;
+
+	/*
+	 * Reset ocr mask to be the highest possible voltage supported for
+	 * this mmc host. This value will be used at next power up.
+	 */
+	host->ocr = 1 << (fls(host->ocr_avail) - 1);
+
 	if (!mmc_host_is_spi(host)) {
 		host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
 		host->ios.chip_select = MMC_CS_DONTCARE;
@@ -1495,6 +1509,12 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
 		mmc_hostname(host), __func__, host->f_init);
 #endif
 	mmc_power_up(host);
+
+	/*
+	 * sdio_reset sends CMD52 to reset card.  Since we do not know
+	 * if the card is being re-initialized, just send it.  CMD52
+	 * should be ignored by SD/eMMC cards.
+	 */
 	sdio_reset(host);
 	mmc_go_idle(host);
 
@@ -1529,7 +1549,7 @@ void mmc_rescan(struct work_struct *work)
 	 * still present
 	 */
 	if (host->bus_ops && host->bus_ops->detect && !host->bus_dead
-	    && mmc_card_is_removable(host))
+	    && !(host->caps & MMC_CAP_NONREMOVABLE))
 		host->bus_ops->detect(host);
 
 	/*
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index ca1fdde29df..20b1c0831ea 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -61,6 +61,8 @@ int mmc_attach_mmc(struct mmc_host *host);
 int mmc_attach_sd(struct mmc_host *host);
 int mmc_attach_sdio(struct mmc_host *host);
 
+void mmc_fixup_device(struct mmc_card *card);
+
 /* Module parameters */
 extern int use_spi_crc;
 
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index b3ac6c5bc5c..2b200c1cfbb 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -94,7 +94,7 @@ static void mmc_host_clk_gate_delayed(struct mmc_host *host)
 		spin_unlock_irqrestore(&host->clk_lock, flags);
 		return;
 	}
-	mutex_lock(&host->clk_gate_mutex);
+	mmc_claim_host(host);
 	spin_lock_irqsave(&host->clk_lock, flags);
 	if (!host->clk_requests) {
 		spin_unlock_irqrestore(&host->clk_lock, flags);
@@ -104,7 +104,7 @@ static void mmc_host_clk_gate_delayed(struct mmc_host *host)
 		pr_debug("%s: gated MCI clock\n", mmc_hostname(host));
 	}
 	spin_unlock_irqrestore(&host->clk_lock, flags);
-	mutex_unlock(&host->clk_gate_mutex);
+	mmc_release_host(host);
 }
 
 /*
@@ -130,7 +130,7 @@ void mmc_host_clk_ungate(struct mmc_host *host)
 {
 	unsigned long flags;
 
-	mutex_lock(&host->clk_gate_mutex);
+	mmc_claim_host(host);
 	spin_lock_irqsave(&host->clk_lock, flags);
 	if (host->clk_gated) {
 		spin_unlock_irqrestore(&host->clk_lock, flags);
@@ -140,7 +140,7 @@ void mmc_host_clk_ungate(struct mmc_host *host)
 	}
 	host->clk_requests++;
 	spin_unlock_irqrestore(&host->clk_lock, flags);
-	mutex_unlock(&host->clk_gate_mutex);
+	mmc_release_host(host);
 }
 
 /**
@@ -160,10 +160,7 @@ static bool mmc_host_may_gate_card(struct mmc_card *card)
 	 * gate the clock, because there is somebody out there that may still
 	 * be using it.
 	 */
-	if (mmc_card_sdio(card))
-		return false;
-
-	return true;
+	return !(card->quirks & MMC_QUIRK_BROKEN_CLK_GATING);
 }
 
 /**
@@ -218,7 +215,6 @@ static inline void mmc_host_clk_init(struct mmc_host *host)
 	host->clk_gated = false;
 	INIT_WORK(&host->clk_gate_work, mmc_host_clk_gate_work);
 	spin_lock_init(&host->clk_lock);
-	mutex_init(&host->clk_gate_mutex);
 }
 
 /**
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 16006ef153f..772d0d0a541 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -302,6 +302,44 @@ static int mmc_read_ext_csd(struct mmc_card *card)
 	}
 
 	if (card->ext_csd.rev >= 4) {
+		/*
+		 * Enhanced area feature support -- check whether the eMMC
+		 * card has the Enhanced area enabled.  If so, export enhanced
+		 * area offset and size to user by adding sysfs interface.
+		 */
+		if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
+				(ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
+			u8 hc_erase_grp_sz =
+				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+			u8 hc_wp_grp_sz =
+				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+			card->ext_csd.enhanced_area_en = 1;
+			/*
+			 * calculate the enhanced data area offset, in bytes
+			 */
+			card->ext_csd.enhanced_area_offset =
+				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
+				(ext_csd[137] << 8) + ext_csd[136];
+			if (mmc_card_blockaddr(card))
+				card->ext_csd.enhanced_area_offset <<= 9;
+			/*
+			 * calculate the enhanced data area size, in kilobytes
+			 */
+			card->ext_csd.enhanced_area_size =
+				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
+				ext_csd[140];
+			card->ext_csd.enhanced_area_size *=
+				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+			card->ext_csd.enhanced_area_size <<= 9;
+		} else {
+			/*
+			 * If the enhanced area is not enabled, disable these
+			 * device attributes.
+			 */
+			card->ext_csd.enhanced_area_offset = -EINVAL;
+			card->ext_csd.enhanced_area_size = -EINVAL;
+		}
 		card->ext_csd.sec_trim_mult =
 			ext_csd[EXT_CSD_SEC_TRIM_MULT];
 		card->ext_csd.sec_erase_mult =
@@ -336,6 +374,9 @@ MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
 MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
+MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
+		card->ext_csd.enhanced_area_offset);
+MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
 
 static struct attribute *mmc_std_attrs[] = {
 	&dev_attr_cid.attr,
@@ -349,6 +390,8 @@ static struct attribute *mmc_std_attrs[] = {
 	&dev_attr_name.attr,
 	&dev_attr_oemid.attr,
 	&dev_attr_serial.attr,
+	&dev_attr_enhanced_area_offset.attr,
+	&dev_attr_enhanced_area_size.attr,
 	NULL,
 };
 
@@ -378,6 +421,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	int err, ddr = 0;
 	u32 cid[4];
 	unsigned int max_dtr;
+	u32 rocr;
 
 	BUG_ON(!host);
 	WARN_ON(!host->claimed);
@@ -391,7 +435,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	mmc_go_idle(host);
 
 	/* The extra bit indicates that we support high capacity */
-	err = mmc_send_op_cond(host, ocr | (1 << 30), NULL);
+	err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
 	if (err)
 		goto err;
 
@@ -479,11 +523,51 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 		err = mmc_read_ext_csd(card);
 		if (err)
 			goto free_card;
+
+		/* If doing byte addressing, check if required to do sector
+		 * addressing.  Handle the case of <2GB cards needing sector
+		 * addressing.  See section 8.1 JEDEC Standard JED84-A441;
+		 * ocr register has bit 30 set for sector addressing.
+		 */
+		if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
+			mmc_card_set_blockaddr(card);
+
 		/* Erase size depends on CSD and Extended CSD */
 		mmc_set_erase_size(card);
 	}
 
 	/*
+	 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
+	 * bit.  This bit will be lost every time after a reset or power off.
+	 */
+	if (card->ext_csd.enhanced_area_en) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				EXT_CSD_ERASE_GROUP_DEF, 1);
+
+		if (err && err != -EBADMSG)
+			goto free_card;
+
+		if (err) {
+			err = 0;
+			/*
+			 * Just disable enhanced area off & sz
+			 * will try to enable ERASE_GROUP_DEF
+			 * during next time reinit
+			 */
+			card->ext_csd.enhanced_area_offset = -EINVAL;
+			card->ext_csd.enhanced_area_size = -EINVAL;
+		} else {
+			card->ext_csd.erase_group_def = 1;
+			/*
+			 * enable ERASE_GRP_DEF successfully.
+			 * This will affect the erase size, so
+			 * here need to reset erase size
+			 */
+			mmc_set_erase_size(card);
+		}
+	}
+
+	/*
 	 * Activate high speed (if supported)
 	 */
 	if ((card->ext_csd.hs_max_dtr != 0) &&
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 60842f878de..f3b22bf89cc 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -105,7 +105,7 @@ int mmc_go_idle(struct mmc_host *host)
 	 * that in case of hardware that won't pull up DAT3/nCS otherwise.
 	 *
 	 * SPI hosts ignore ios.chip_select; it's managed according to
-	 * rules that must accomodate non-MMC slaves which this layer
+	 * rules that must accommodate non-MMC slaves which this layer
 	 * won't even know about.
 	 */
 	if (!mmc_host_is_spi(host)) {
diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c
new file mode 100644
index 00000000000..11118b74eb2
--- /dev/null
+++ b/drivers/mmc/core/quirks.c
@@ -0,0 +1,84 @@
+/*
+ *  This file contains work-arounds for many known sdio hardware
+ *  bugs.
+ *
+ *  Copyright (c) 2011 Pierre Tardy <tardyp@gmail.com>
+ *  Inspired from pci fixup code:
+ *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mmc/card.h>
+#include <linux/mod_devicetable.h>
+
+/*
+ *  The world is not perfect and supplies us with broken mmc/sdio devices.
+ *  For at least a part of these bugs we need a work-around
+ */
+
+struct mmc_fixup {
+	u16 vendor, device;	/* You can use SDIO_ANY_ID here of course */
+	void (*vendor_fixup)(struct mmc_card *card, int data);
+	int data;
+};
+
+/*
+ * This hook just adds a quirk unconditionnally
+ */
+static void __maybe_unused add_quirk(struct mmc_card *card, int data)
+{
+	card->quirks |= data;
+}
+
+/*
+ * This hook just removes a quirk unconditionnally
+ */
+static void __maybe_unused remove_quirk(struct mmc_card *card, int data)
+{
+	card->quirks &= ~data;
+}
+
+/*
+ * This hook just adds a quirk for all sdio devices
+ */
+static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
+{
+	if (mmc_card_sdio(card))
+		card->quirks |= data;
+}
+
+#ifndef SDIO_VENDOR_ID_TI
+#define SDIO_VENDOR_ID_TI		0x0097
+#endif
+
+#ifndef SDIO_DEVICE_ID_TI_WL1271
+#define SDIO_DEVICE_ID_TI_WL1271	0x4076
+#endif
+
+static const struct mmc_fixup mmc_fixup_methods[] = {
+	/* by default sdio devices are considered CLK_GATING broken */
+	/* good cards will be whitelisted as they are tested */
+	{ SDIO_ANY_ID, SDIO_ANY_ID,
+		add_quirk_for_sdio_devices, MMC_QUIRK_BROKEN_CLK_GATING },
+	{ SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
+		remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING },
+	{ 0 }
+};
+
+void mmc_fixup_device(struct mmc_card *card)
+{
+	const struct mmc_fixup *f;
+
+	for (f = mmc_fixup_methods; f->vendor_fixup; f++) {
+		if ((f->vendor == card->cis.vendor
+		     || f->vendor == (u16) SDIO_ANY_ID) &&
+		    (f->device == card->cis.device
+		     || f->device == (u16) SDIO_ANY_ID)) {
+			dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
+			f->vendor_fixup(card, f->data);
+		}
+	}
+}
+EXPORT_SYMBOL(mmc_fixup_device);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index d18c32bca99..6dac89fe053 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -21,6 +21,7 @@
 #include "core.h"
 #include "bus.h"
 #include "mmc_ops.h"
+#include "sd.h"
 #include "sd_ops.h"
 
 static const unsigned int tran_exp[] = {
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 797cdb5887f..76af349c14b 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -9,6 +9,7 @@
  * your option) any later version.
  */
 
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/scatterlist.h>
 
@@ -252,6 +253,7 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 	struct mmc_command cmd;
 	struct mmc_data data;
 	struct scatterlist sg;
+	void *data_buf;
 
 	BUG_ON(!card);
 	BUG_ON(!card->host);
@@ -263,6 +265,13 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 	if (err)
 		return err;
 
+	/* dma onto stack is unsafe/nonportable, but callers to this
+	 * routine normally provide temporary on-stack buffers ...
+	 */
+	data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
+	if (data_buf == NULL)
+		return -ENOMEM;
+
 	memset(&mrq, 0, sizeof(struct mmc_request));
 	memset(&cmd, 0, sizeof(struct mmc_command));
 	memset(&data, 0, sizeof(struct mmc_data));
@@ -280,12 +289,15 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 	data.sg = &sg;
 	data.sg_len = 1;
 
-	sg_init_one(&sg, scr, 8);
+	sg_init_one(&sg, data_buf, 8);
 
 	mmc_set_data_timeout(&data, card);
 
 	mmc_wait_for_req(card->host, &mrq);
 
+	memcpy(scr, data_buf, sizeof(card->raw_scr));
+	kfree(data_buf);
+
 	if (cmd.error)
 		return cmd.error;
 	if (data.error)
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 5c4a54d9b6a..db0f0b44d68 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -395,6 +395,14 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 		if (err)
 			goto remove;
 
+		/*
+		 * Update oldcard with the new RCA received from the SDIO
+		 * device -- we're doing this so that it's updated in the
+		 * "card" struct when oldcard overwrites that later.
+		 */
+		if (oldcard)
+			oldcard->rca = card->rca;
+
 		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
 	}
 
@@ -458,6 +466,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 
 		card = oldcard;
 	}
+	mmc_fixup_device(card);
 
 	if (card->type == MMC_TYPE_SD_COMBO) {
 		err = mmc_sd_setup_card(host, card, oldcard != NULL);
@@ -792,7 +801,6 @@ int mmc_attach_sdio(struct mmc_host *host)
 	 */
 	mmc_release_host(host);
 	err = mmc_add_card(host->card);
-	mmc_claim_host(host);
 	if (err)
 		goto remove_added;
 
@@ -805,12 +813,12 @@ int mmc_attach_sdio(struct mmc_host *host)
 			goto remove_added;
 	}
 
+	mmc_claim_host(host);
 	return 0;
 
 
 remove_added:
 	/* Remove without lock if the device has been added. */
-	mmc_release_host(host);
 	mmc_sdio_remove(host);
 	mmc_claim_host(host);
 remove:
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index bb192f90e8e..b3001617e67 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -45,7 +45,7 @@ static int process_sdio_pending_irqs(struct mmc_card *card)
 			struct sdio_func *func = card->sdio_func[i - 1];
 			if (!func) {
 				printk(KERN_WARNING "%s: pending IRQ for "
-					"non-existant function\n",
+					"non-existent function\n",
 					mmc_card_id(card));
 				ret = -EINVAL;
 			} else if (func->irq_handler) {