6 files changed, 105 insertions, 259 deletions

diff --git a/arch/arm/plat-spear/Kconfig b/arch/arm/plat-spear/Kconfig
index 1bb3dbce881..387655b5ce0 100644
--- a/arch/arm/plat-spear/Kconfig
+++ b/arch/arm/plat-spear/Kconfig
@@ -9,9 +9,11 @@ choice
 	default ARCH_SPEAR3XX
 
 config ARCH_SPEAR3XX
-	bool "SPEAr3XX"
+	bool "ST SPEAr3xx with Device Tree"
 	select ARM_VIC
 	select CPU_ARM926T
+	select USE_OF
+	select PINCTRL
 	help
 	  Supports for ARM's SPEAR3XX family
 
diff --git a/arch/arm/plat-spear/Makefile b/arch/arm/plat-spear/Makefile
index 8c0cb6a965a..38f1235f463 100644
--- a/arch/arm/plat-spear/Makefile
+++ b/arch/arm/plat-spear/Makefile
@@ -3,6 +3,6 @@
 #
 
 # Common support
-obj-y	:= restart.o time.o
+obj-y	:= restart.o time.o pl080.o
 
-obj-$(CONFIG_ARCH_SPEAR3XX)	+= shirq.o padmux.o
+obj-$(CONFIG_ARCH_SPEAR3XX)	+= shirq.o
diff --git a/arch/arm/plat-spear/include/plat/padmux.h b/arch/arm/plat-spear/include/plat/padmux.h
deleted file mode 100644
index 877f3adcf61..00000000000
--- a/arch/arm/plat-spear/include/plat/padmux.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * arch/arm/plat-spear/include/plat/padmux.h
- *
- * SPEAr platform specific gpio pads muxing file
- *
- * Copyright (C) 2009 ST Microelectronics
- * Viresh Kumar<viresh.kumar@st.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#ifndef __PLAT_PADMUX_H
-#define __PLAT_PADMUX_H
-
-#include <linux/types.h>
-
-/*
- * struct pmx_reg: configuration structure for mode reg and mux reg
- *
- * offset: offset of mode reg
- * mask: mask of mode reg
- */
-struct pmx_reg {
-	u32 offset;
-	u32 mask;
-};
-
-/*
- * struct pmx_dev_mode: configuration structure every group of modes of a device
- *
- * ids: all modes for this configuration
- * mask: mask for supported mode
- */
-struct pmx_dev_mode {
-	u32 ids;
-	u32 mask;
-};
-
-/*
- * struct pmx_mode: mode definition structure
- *
- * name: mode name
- * mask: mode mask
- */
-struct pmx_mode {
-	char *name;
-	u32 id;
-	u32 mask;
-};
-
-/*
- * struct pmx_dev: device definition structure
- *
- * name: device name
- * modes: device configuration array for different modes supported
- * mode_count: size of modes array
- * is_active: is peripheral active/enabled
- * enb_on_reset: if 1, mask bits to be cleared in reg otherwise to be set in reg
- */
-struct pmx_dev {
-	char *name;
-	struct pmx_dev_mode *modes;
-	u8 mode_count;
-	bool is_active;
-	bool enb_on_reset;
-};
-
-/*
- * struct pmx_driver: driver definition structure
- *
- * mode: mode to be set
- * devs: array of pointer to pmx devices
- * devs_count: ARRAY_SIZE of devs
- * base: base address of soc config registers
- * mode_reg: structure of mode config register
- * mux_reg: structure of device mux config register
- */
-struct pmx_driver {
-	struct pmx_mode *mode;
-	struct pmx_dev **devs;
-	u8 devs_count;
-	u32 *base;
-	struct pmx_reg mode_reg;
-	struct pmx_reg mux_reg;
-};
-
-/* pmx functions */
-int pmx_register(struct pmx_driver *driver);
-
-#endif /* __PLAT_PADMUX_H */
diff --git a/arch/arm/plat-spear/include/plat/pl080.h b/arch/arm/plat-spear/include/plat/pl080.h
new file mode 100644
index 00000000000..e14a3e4932f
--- /dev/null
+++ b/arch/arm/plat-spear/include/plat/pl080.h
@@ -0,0 +1,21 @@
+/*
+ * arch/arm/plat-spear/include/plat/pl080.h
+ *
+ * DMAC pl080 definitions for SPEAr platform
+ *
+ * Copyright (C) 2012 ST Microelectronics
+ * Viresh Kumar <viresh.kumar@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __PLAT_PL080_H
+#define __PLAT_PL080_H
+
+struct pl08x_dma_chan;
+int pl080_get_signal(struct pl08x_dma_chan *ch);
+void pl080_put_signal(struct pl08x_dma_chan *ch);
+
+#endif /* __PLAT_PL080_H */
diff --git a/arch/arm/plat-spear/padmux.c b/arch/arm/plat-spear/padmux.c
deleted file mode 100644
index 555eec6dc1c..00000000000
--- a/arch/arm/plat-spear/padmux.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * arch/arm/plat-spear/include/plat/padmux.c
- *
- * SPEAr platform specific gpio pads muxing source file
- *
- * Copyright (C) 2009 ST Microelectronics
- * Viresh Kumar<viresh.kumar@st.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <plat/padmux.h>
-
-/*
- * struct pmx: pmx definition structure
- *
- * base: base address of configuration registers
- * mode_reg: mode configurations
- * mux_reg: muxing configurations
- * active_mode: pointer to current active mode
- */
-struct pmx {
-	u32 base;
-	struct pmx_reg mode_reg;
-	struct pmx_reg mux_reg;
-	struct pmx_mode *active_mode;
-};
-
-static struct pmx *pmx;
-
-/**
- * pmx_mode_set - Enables an multiplexing mode
- * @mode - pointer to pmx mode
- *
- * It will set mode of operation in hardware.
- * Returns -ve on Err otherwise 0
- */
-static int pmx_mode_set(struct pmx_mode *mode)
-{
-	u32 val;
-
-	if (!mode->name)
-		return -EFAULT;
-
-	pmx->active_mode = mode;
-
-	val = readl(pmx->base + pmx->mode_reg.offset);
-	val &= ~pmx->mode_reg.mask;
-	val |= mode->mask & pmx->mode_reg.mask;
-	writel(val, pmx->base + pmx->mode_reg.offset);
-
-	return 0;
-}
-
-/**
- * pmx_devs_enable - Enables list of devices
- * @devs - pointer to pmx device array
- * @count - number of devices to enable
- *
- * It will enable pads for all required peripherals once and only once.
- * If peripheral is not supported by current mode then request is rejected.
- * Conflicts between peripherals are not handled and peripherals will be
- * enabled in the order they are present in pmx_dev array.
- * In case of conflicts last peripheral enabled will be present.
- * Returns -ve on Err otherwise 0
- */
-static int pmx_devs_enable(struct pmx_dev **devs, u8 count)
-{
-	u32 val, i, mask;
-
-	if (!count)
-		return -EINVAL;
-
-	val = readl(pmx->base + pmx->mux_reg.offset);
-	for (i = 0; i < count; i++) {
-		u8 j = 0;
-
-		if (!devs[i]->name || !devs[i]->modes) {
-			printk(KERN_ERR "padmux: dev name or modes is null\n");
-			continue;
-		}
-		/* check if peripheral exists in active mode */
-		if (pmx->active_mode) {
-			bool found = false;
-			for (j = 0; j < devs[i]->mode_count; j++) {
-				if (devs[i]->modes[j].ids &
-						pmx->active_mode->id) {
-					found = true;
-					break;
-				}
-			}
-			if (found == false) {
-				printk(KERN_ERR "%s device not available in %s"\
-						"mode\n", devs[i]->name,
-						pmx->active_mode->name);
-				continue;
-			}
-		}
-
-		/* enable peripheral */
-		mask = devs[i]->modes[j].mask & pmx->mux_reg.mask;
-		if (devs[i]->enb_on_reset)
-			val &= ~mask;
-		else
-			val |= mask;
-
-		devs[i]->is_active = true;
-	}
-	writel(val, pmx->base + pmx->mux_reg.offset);
-	kfree(pmx);
-
-	/* this will ensure that multiplexing can't be changed now */
-	pmx = (struct pmx *)-1;
-
-	return 0;
-}
-
-/**
- * pmx_register - registers a platform requesting pad mux feature
- * @driver - pointer to driver structure containing driver specific parameters
- *
- * Also this must be called only once. This will allocate memory for pmx
- * structure, will call pmx_mode_set, will call pmx_devs_enable.
- * Returns -ve on Err otherwise 0
- */
-int pmx_register(struct pmx_driver *driver)
-{
-	int ret = 0;
-
-	if (pmx)
-		return -EPERM;
-	if (!driver->base || !driver->devs)
-		return -EFAULT;
-
-	pmx = kzalloc(sizeof(*pmx), GFP_KERNEL);
-	if (!pmx)
-		return -ENOMEM;
-
-	pmx->base = (u32)driver->base;
-	pmx->mode_reg.offset = driver->mode_reg.offset;
-	pmx->mode_reg.mask = driver->mode_reg.mask;
-	pmx->mux_reg.offset = driver->mux_reg.offset;
-	pmx->mux_reg.mask = driver->mux_reg.mask;
-
-	/* choose mode to enable */
-	if (driver->mode) {
-		ret = pmx_mode_set(driver->mode);
-		if (ret)
-			goto pmx_fail;
-	}
-	ret = pmx_devs_enable(driver->devs, driver->devs_count);
-	if (ret)
-		goto pmx_fail;
-
-	return 0;
-
-pmx_fail:
-	return ret;
-}
diff --git a/arch/arm/plat-spear/pl080.c b/arch/arm/plat-spear/pl080.c
new file mode 100644
index 00000000000..d53d75e1af5
--- /dev/null
+++ b/arch/arm/plat-spear/pl080.c
@@ -0,0 +1,79 @@
+/*
+ * arch/arm/plat-spear/pl080.c
+ *
+ * DMAC pl080 definitions for SPEAr platform
+ *
+ * Copyright (C) 2012 ST Microelectronics
+ * Viresh Kumar <viresh.kumar@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/amba/pl08x.h>
+#include <linux/amba/bus.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/spinlock_types.h>
+#include <mach/misc_regs.h>
+
+static spinlock_t lock = __SPIN_LOCK_UNLOCKED(x);
+
+struct {
+	unsigned char busy;
+	unsigned char val;
+} signals[16] = {{0, 0}, };
+
+int pl080_get_signal(struct pl08x_dma_chan *ch)
+{
+	const struct pl08x_channel_data *cd = ch->cd;
+	unsigned int signal = cd->min_signal, val;
+	unsigned long flags;
+
+	spin_lock_irqsave(&lock, flags);
+
+	/* Return if signal is already acquired by somebody else */
+	if (signals[signal].busy &&
+			(signals[signal].val != cd->muxval)) {
+		spin_unlock_irqrestore(&lock, flags);
+		return -EBUSY;
+	}
+
+	/* If acquiring for the first time, configure it */
+	if (!signals[signal].busy) {
+		val = readl(DMA_CHN_CFG);
+
+		/*
+		 * Each request line has two bits in DMA_CHN_CFG register. To
+		 * goto the bits of current request line, do left shift of
+		 * value by 2 * signal number.
+		 */
+		val &= ~(0x3 << (signal * 2));
+		val |= cd->muxval << (signal * 2);
+		writel(val, DMA_CHN_CFG);
+	}
+
+	signals[signal].busy++;
+	signals[signal].val = cd->muxval;
+	spin_unlock_irqrestore(&lock, flags);
+
+	return signal;
+}
+
+void pl080_put_signal(struct pl08x_dma_chan *ch)
+{
+	const struct pl08x_channel_data *cd = ch->cd;
+	unsigned long flags;
+
+	spin_lock_irqsave(&lock, flags);
+
+	/* if signal is not used */
+	if (!signals[cd->min_signal].busy)
+		BUG();
+
+	signals[cd->min_signal].busy--;
+
+	spin_unlock_irqrestore(&lock, flags);
+}