Re: [PATCH 11/21] ARM: OMAP: McBSP: Prepare for splitting into omap1 and omap2 code

[Tony Lindgren <tony@atomide.com>]

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* Tony Lindgren <tony@atomide.com> [080617 11:43]:
> * Russell King - ARM Linux <linux@arm.linux.org.uk> [080614 11:17]:
> > On Fri, Jun 06, 2008 at 06:30:43PM -0700, Tony Lindgren wrote:
> > > +#if defined(CONFIG_OMAP_MCBSP) || defined(CONFIG_OMAP_MCBSP_MODULE)
> > > +
> > > +static struct platform_device omap_mcbsp_devices[OMAP_MAX_MCBSP_COUNT];
> > > +static int mcbsps_configured;
> > > +
> > > +void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
> > > +					int size)
> > > +{
> > > +	int i;
> > > +
> > > +	if (size > OMAP_MAX_MCBSP_COUNT) {
> > > +		printk(KERN_WARNING "Registered too many McBSPs platform_data."
> > > +			" Using maximum (%d) available.\n",
> > > +			OMAP_MAX_MCBSP_COUNT);
> > > +		size = OMAP_MAX_MCBSP_COUNT;
> > > +	}
> > > +
> > > +	for (i = 0; i < size; i++) {
> > > +		struct platform_device *new_mcbsp = &omap_mcbsp_devices[i];
> > 
> > Any reason this can't use the platform_device_alloc() API rather than
> > having a static restriction on the number (coupled with the wastage of
> > space for smaller 'size's ?)
> 
> I agree, this should be allocated. Eduardo, any comments?

Here's updated patch that uses platform_device_alloc().

Tony

[-- Attachment #2: 0011-omap-mcbsp-platform.patch --]
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>From 53f2999d681669df0645053dc572d97cda69823d Mon Sep 17 00:00:00 2001
From: Eduardo Valentin <eduardo.valentin@indt.org.br>
Date: Mon, 23 Jun 2008 12:37:30 +0300
Subject: [PATCH] ARM: OMAP: McBSP: Prepare for splitting into omap1 and omap2 code

This patch transform mcbsp code to use platform data
from arch/arm/plat-omap/devices.c

It also gets ride of ifdefs on mcbsp.c code.
To do it, a platform data structure was defined.

Signed-off-by: Eduardo Valentin <eduardo.valentin@indt.org.br>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/devices.c b/arch/arm/plat-omap/devices.c
index 4a53f9b..81002b7 100644
--- a/arch/arm/plat-omap/devices.c
+++ b/arch/arm/plat-omap/devices.c
@@ -24,6 +24,7 @@
 #include <asm/arch/mux.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/menelaus.h>
+#include <asm/arch/mcbsp.h>
 
 #if	defined(CONFIG_OMAP_DSP) || defined(CONFIG_OMAP_DSP_MODULE)
 
@@ -145,6 +146,53 @@ static inline void omap_init_kp(void) {}
 #endif
 
 /*-------------------------------------------------------------------------*/
+#if defined(CONFIG_OMAP_MCBSP) || defined(CONFIG_OMAP_MCBSP_MODULE)
+
+static struct platform_device **omap_mcbsp_devices;
+
+void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
+					int size)
+{
+	int i;
+
+	if (size > OMAP_MAX_MCBSP_COUNT) {
+		printk(KERN_WARNING "Registered too many McBSPs platform_data."
+			" Using maximum (%d) available.\n",
+			OMAP_MAX_MCBSP_COUNT);
+		size = OMAP_MAX_MCBSP_COUNT;
+	}
+
+	omap_mcbsp_devices = kzalloc(size * sizeof(struct platform_device *),
+				     GFP_KERNEL);
+	if (!omap_mcbsp_devices) {
+		printk(KERN_ERR "Could not register McBSP devices\n");
+		return;
+	}
+
+	for (i = 0; i < size; i++) {
+		struct platform_device *new_mcbsp;
+		int ret;
+
+		new_mcbsp = platform_device_alloc("omap-mcbsp", i + 1);
+		if (!new_mcbsp)
+			continue;
+		new_mcbsp->dev.platform_data = &config[i];
+		ret = platform_device_add(new_mcbsp);
+		if (ret) {
+			platform_device_put(new_mcbsp);
+			continue;
+		}
+		omap_mcbsp_devices[i] = new_mcbsp;
+	}
+}
+
+#else
+void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
+					int size)
+{  }
+#endif
+
+/*-------------------------------------------------------------------------*/
 
 #if	defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
 
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index c0018b1..c7f7406 100644
--- a/arch/arm/plat-omap/mcbsp.c
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -15,6 +15,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/device.h>
+#include <linux/platform_device.h>
 #include <linux/wait.h>
 #include <linux/completion.h>
 #include <linux/interrupt.h>
@@ -24,83 +25,53 @@
 #include <linux/io.h>
 
 #include <asm/arch/dma.h>
-#include <asm/arch/mux.h>
-#include <asm/arch/irqs.h>
-#include <asm/arch/dsp_common.h>
 #include <asm/arch/mcbsp.h>
 
-#ifdef CONFIG_MCBSP_DEBUG
-#define DBG(x...)	printk(x)
-#else
-#define DBG(x...)			do { } while (0)
-#endif
-
-struct omap_mcbsp {
-	u32                          io_base;
-	u8                           id;
-	u8                           free;
-	omap_mcbsp_word_length       rx_word_length;
-	omap_mcbsp_word_length       tx_word_length;
-
-	omap_mcbsp_io_type_t         io_type; /* IRQ or poll */
-	/* IRQ based TX/RX */
-	int                          rx_irq;
-	int                          tx_irq;
-
-	/* DMA stuff */
-	u8                           dma_rx_sync;
-	short                        dma_rx_lch;
-	u8                           dma_tx_sync;
-	short                        dma_tx_lch;
-
-	/* Completion queues */
-	struct completion            tx_irq_completion;
-	struct completion            rx_irq_completion;
-	struct completion            tx_dma_completion;
-	struct completion            rx_dma_completion;
-
-	/* Protect the field .free, while checking if the mcbsp is in use */
-	spinlock_t                   lock;
-};
-
 static struct omap_mcbsp mcbsp[OMAP_MAX_MCBSP_COUNT];
-#ifdef CONFIG_ARCH_OMAP1
-static struct clk *mcbsp_dsp_ck;
-static struct clk *mcbsp_api_ck;
-static struct clk *mcbsp_dspxor_ck;
-#endif
-#ifdef CONFIG_ARCH_OMAP2
-static struct clk *mcbsp1_ick;
-static struct clk *mcbsp1_fck;
-static struct clk *mcbsp2_ick;
-static struct clk *mcbsp2_fck;
-#endif
+
+#define omap_mcbsp_check_valid_id(id)	(mcbsp[id].pdata && \
+					mcbsp[id].pdata->ops && \
+					mcbsp[id].pdata->ops->check && \
+					(mcbsp[id].pdata->ops->check(id) == 0))
 
 static void omap_mcbsp_dump_reg(u8 id)
 {
-	DBG("**** MCBSP%d regs ****\n", mcbsp[id].id);
-	DBG("DRR2:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DRR2));
-	DBG("DRR1:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DRR1));
-	DBG("DXR2:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DXR2));
-	DBG("DXR1:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DXR1));
-	DBG("SPCR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR2));
-	DBG("SPCR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR1));
-	DBG("RCR2:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, RCR2));
-	DBG("RCR1:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, RCR1));
-	DBG("XCR2:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, XCR2));
-	DBG("XCR1:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, XCR1));
-	DBG("SRGR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR2));
-	DBG("SRGR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR1));
-	DBG("PCR0:  0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, PCR0));
-	DBG("***********************\n");
+	dev_dbg(mcbsp[id].dev, "**** McBSP%d regs ****\n", mcbsp[id].id);
+	dev_dbg(mcbsp[id].dev, "DRR2:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, DRR2));
+	dev_dbg(mcbsp[id].dev, "DRR1:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, DRR1));
+	dev_dbg(mcbsp[id].dev, "DXR2:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, DXR2));
+	dev_dbg(mcbsp[id].dev, "DXR1:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, DXR1));
+	dev_dbg(mcbsp[id].dev, "SPCR2: 0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR2));
+	dev_dbg(mcbsp[id].dev, "SPCR1: 0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR1));
+	dev_dbg(mcbsp[id].dev, "RCR2:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, RCR2));
+	dev_dbg(mcbsp[id].dev, "RCR1:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, RCR1));
+	dev_dbg(mcbsp[id].dev, "XCR2:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, XCR2));
+	dev_dbg(mcbsp[id].dev, "XCR1:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, XCR1));
+	dev_dbg(mcbsp[id].dev, "SRGR2: 0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR2));
+	dev_dbg(mcbsp[id].dev, "SRGR1: 0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR1));
+	dev_dbg(mcbsp[id].dev, "PCR0:  0x%04x\n",
+			OMAP_MCBSP_READ(mcbsp[id].io_base, PCR0));
+	dev_dbg(mcbsp[id].dev, "***********************\n");
 }
 
 static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id)
 {
 	struct omap_mcbsp *mcbsp_tx = dev_id;
 
-	DBG("TX IRQ callback : 0x%x\n",
-	    OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2));
+	dev_dbg(mcbsp_tx->dev, "TX IRQ callback : 0x%x\n",
+		OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2));
 
 	complete(&mcbsp_tx->tx_irq_completion);
 
@@ -111,8 +82,8 @@ static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id)
 {
 	struct omap_mcbsp *mcbsp_rx = dev_id;
 
-	DBG("RX IRQ callback : 0x%x\n",
-	    OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR2));
+	dev_dbg(mcbsp_rx->dev, "RX IRQ callback : 0x%x\n",
+		OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR2));
 
 	complete(&mcbsp_rx->rx_irq_completion);
 
@@ -123,8 +94,8 @@ static void omap_mcbsp_tx_dma_callback(int lch, u16 ch_status, void *data)
 {
 	struct omap_mcbsp *mcbsp_dma_tx = data;
 
-	DBG("TX DMA callback : 0x%x\n",
-	    OMAP_MCBSP_READ(mcbsp_dma_tx->io_base, SPCR2));
+	dev_dbg(mcbsp_dma_tx->dev, "TX DMA callback : 0x%x\n",
+		OMAP_MCBSP_READ(mcbsp_dma_tx->io_base, SPCR2));
 
 	/* We can free the channels */
 	omap_free_dma(mcbsp_dma_tx->dma_tx_lch);
@@ -137,8 +108,8 @@ static void omap_mcbsp_rx_dma_callback(int lch, u16 ch_status, void *data)
 {
 	struct omap_mcbsp *mcbsp_dma_rx = data;
 
-	DBG("RX DMA callback : 0x%x\n",
-	    OMAP_MCBSP_READ(mcbsp_dma_rx->io_base, SPCR2));
+	dev_dbg(mcbsp_dma_rx->dev, "RX DMA callback : 0x%x\n",
+		OMAP_MCBSP_READ(mcbsp_dma_rx->io_base, SPCR2));
 
 	/* We can free the channels */
 	omap_free_dma(mcbsp_dma_rx->dma_rx_lch);
@@ -155,9 +126,16 @@ static void omap_mcbsp_rx_dma_callback(int lch, u16 ch_status, void *data)
  */
 void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config)
 {
-	u32 io_base = mcbsp[id].io_base;
+	u32 io_base;
 
-	DBG("OMAP-McBSP: McBSP%d  io_base: 0x%8x\n", id + 1, io_base);
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return;
+	}
+
+	io_base = mcbsp[id].io_base;
+	dev_dbg(mcbsp[id].dev, "Configuring McBSP%d  io_base: 0x%8x\n",
+			mcbsp[id].id, io_base);
 
 	/* We write the given config */
 	OMAP_MCBSP_WRITE(io_base, SPCR2, config->spcr2);
@@ -174,97 +152,22 @@ void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config)
 }
 EXPORT_SYMBOL(omap_mcbsp_config);
 
-static int omap_mcbsp_check(unsigned int id)
-{
-	if (cpu_is_omap730()) {
-		if (id > OMAP_MAX_MCBSP_COUNT - 1) {
-		       printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n",
-				id + 1);
-		       return -1;
-		}
-		return 0;
-	}
-
-	if (cpu_is_omap15xx() || cpu_is_omap16xx() || cpu_is_omap24xx()) {
-		if (id > OMAP_MAX_MCBSP_COUNT) {
-			printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n",
-				id + 1);
-			return -1;
-		}
-		return 0;
-	}
-
-	return -1;
-}
-
-#ifdef CONFIG_ARCH_OMAP1
-static void omap_mcbsp_dsp_request(void)
-{
-	if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
-		int ret;
-
-		ret = omap_dsp_request_mem();
-		if (ret < 0) {
-			printk(KERN_ERR "Could not get dsp memory: %i\n", ret);
-			return;
-		}
-
-		clk_enable(mcbsp_dsp_ck);
-		clk_enable(mcbsp_api_ck);
-
-		/* enable 12MHz clock to mcbsp 1 & 3 */
-		clk_enable(mcbsp_dspxor_ck);
-
-		/*
-		 * DSP external peripheral reset
-		 * FIXME: This should be moved to dsp code
-		 */
-		__raw_writew(__raw_readw(DSP_RSTCT2) | 1 | 1 << 1,
-			     DSP_RSTCT2);
-	}
-}
-
-static void omap_mcbsp_dsp_free(void)
-{
-	if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
-		omap_dsp_release_mem();
-		clk_disable(mcbsp_dspxor_ck);
-		clk_disable(mcbsp_dsp_ck);
-		clk_disable(mcbsp_api_ck);
-	}
-}
-#endif
-
-#ifdef CONFIG_ARCH_OMAP2
-static void omap2_mcbsp2_mux_setup(void)
-{
-	if (cpu_is_omap2420()) {
-		omap_cfg_reg(Y15_24XX_MCBSP2_CLKX);
-		omap_cfg_reg(R14_24XX_MCBSP2_FSX);
-		omap_cfg_reg(W15_24XX_MCBSP2_DR);
-		omap_cfg_reg(V15_24XX_MCBSP2_DX);
-		omap_cfg_reg(V14_24XX_GPIO117);
-	}
-	/*
-	 * Need to add MUX settings for OMAP 2430 SDP
-	 */
-}
-#endif
-
 /*
  * We can choose between IRQ based or polled IO.
  * This needs to be called before omap_mcbsp_request().
  */
 int omap_mcbsp_set_io_type(unsigned int id, omap_mcbsp_io_type_t io_type)
 {
-	if (omap_mcbsp_check(id) < 0)
-		return -EINVAL;
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
 
 	spin_lock(&mcbsp[id].lock);
 
 	if (!mcbsp[id].free) {
-		printk(KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n",
-			id + 1);
+		dev_err(mcbsp[id].dev, "McBSP%d is currently in use\n",
+			mcbsp[id].id);
 		spin_unlock(&mcbsp[id].lock);
 		return -EINVAL;
 	}
@@ -281,34 +184,20 @@ int omap_mcbsp_request(unsigned int id)
 {
 	int err;
 
-	if (omap_mcbsp_check(id) < 0)
-		return -EINVAL;
-
-#ifdef CONFIG_ARCH_OMAP1
-	/*
-	 * On 1510, 1610 and 1710, McBSP1 and McBSP3
-	 * are DSP public peripherals.
-	 */
-	if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
-		omap_mcbsp_dsp_request();
-#endif
-
-#ifdef CONFIG_ARCH_OMAP2
-	if (cpu_is_omap24xx()) {
-		if (id == OMAP_MCBSP1) {
-			clk_enable(mcbsp1_ick);
-			clk_enable(mcbsp1_fck);
-		} else {
-			clk_enable(mcbsp2_ick);
-			clk_enable(mcbsp2_fck);
-		}
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
 	}
-#endif
+
+	if (mcbsp[id].pdata->ops->request)
+		mcbsp[id].pdata->ops->request(id);
+
+	clk_enable(mcbsp[id].clk);
 
 	spin_lock(&mcbsp[id].lock);
 	if (!mcbsp[id].free) {
-		printk(KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n",
-			id + 1);
+		dev_err(mcbsp[id].dev, "McBSP%d is currently in use\n",
+			mcbsp[id].id);
 		spin_unlock(&mcbsp[id].lock);
 		return -1;
 	}
@@ -321,9 +210,9 @@ int omap_mcbsp_request(unsigned int id)
 		err = request_irq(mcbsp[id].tx_irq, omap_mcbsp_tx_irq_handler,
 					0, "McBSP", (void *) (&mcbsp[id]));
 		if (err != 0) {
-			printk(KERN_ERR "OMAP-McBSP: Unable to "
-					"request TX IRQ %d for McBSP%d\n",
-					mcbsp[id].tx_irq, mcbsp[id].id);
+			dev_err(mcbsp[id].dev, "Unable to request TX IRQ %d "
+					"for McBSP%d\n", mcbsp[id].tx_irq,
+					mcbsp[id].id);
 			return err;
 		}
 
@@ -332,9 +221,9 @@ int omap_mcbsp_request(unsigned int id)
 		err = request_irq(mcbsp[id].rx_irq, omap_mcbsp_rx_irq_handler,
 					0, "McBSP", (void *) (&mcbsp[id]));
 		if (err != 0) {
-			printk(KERN_ERR "OMAP-McBSP: Unable to "
-					"request RX IRQ %d for McBSP%d\n",
-					mcbsp[id].rx_irq, mcbsp[id].id);
+			dev_err(mcbsp[id].dev, "Unable to request RX IRQ %d "
+					"for McBSP%d\n", mcbsp[id].rx_irq,
+					mcbsp[id].id);
 			free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
 			return err;
 		}
@@ -348,32 +237,20 @@ EXPORT_SYMBOL(omap_mcbsp_request);
 
 void omap_mcbsp_free(unsigned int id)
 {
-	if (omap_mcbsp_check(id) < 0)
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
 		return;
-
-#ifdef CONFIG_ARCH_OMAP1
-	if (cpu_class_is_omap1()) {
-		if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
-			omap_mcbsp_dsp_free();
 	}
-#endif
-
-#ifdef CONFIG_ARCH_OMAP2
-	if (cpu_is_omap24xx()) {
-		if (id == OMAP_MCBSP1) {
-			clk_disable(mcbsp1_ick);
-			clk_disable(mcbsp1_fck);
-		} else {
-			clk_disable(mcbsp2_ick);
-			clk_disable(mcbsp2_fck);
-		}
-	}
-#endif
+
+	if (mcbsp[id].pdata->ops->free)
+		mcbsp[id].pdata->ops->free(id);
+
+	clk_disable(mcbsp[id].clk);
 
 	spin_lock(&mcbsp[id].lock);
 	if (mcbsp[id].free) {
-		printk(KERN_ERR "OMAP-McBSP: McBSP%d was not reserved\n",
-			id + 1);
+		dev_err(mcbsp[id].dev, "McBSP%d was not reserved\n",
+			mcbsp[id].id);
 		spin_unlock(&mcbsp[id].lock);
 		return;
 	}
@@ -399,8 +276,10 @@ void omap_mcbsp_start(unsigned int id)
 	u32 io_base;
 	u16 w;
 
-	if (omap_mcbsp_check(id) < 0)
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
 		return;
+	}
 
 	io_base = mcbsp[id].io_base;
 
@@ -434,8 +313,10 @@ void omap_mcbsp_stop(unsigned int id)
 	u32 io_base;
 	u16 w;
 
-	if (omap_mcbsp_check(id) < 0)
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
 		return;
+	}
 
 	io_base = mcbsp[id].io_base;
 
@@ -456,7 +337,14 @@ EXPORT_SYMBOL(omap_mcbsp_stop);
 /* polled mcbsp i/o operations */
 int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
 {
-	u32 base = mcbsp[id].io_base;
+	u32 base;
+
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
+
+	base = mcbsp[id].io_base;
 	writew(buf, base + OMAP_MCBSP_REG_DXR1);
 	/* if frame sync error - clear the error */
 	if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) {
@@ -478,8 +366,8 @@ int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
 				       (XRST),
 				       base + OMAP_MCBSP_REG_SPCR2);
 				udelay(10);
-				printk(KERN_ERR
-				       " Could not write to McBSP Register\n");
+				dev_err(mcbsp[id].dev, "Could not write to"
+					" McBSP%d Register\n", mcbsp[id].id);
 				return -2;
 			}
 		}
@@ -491,7 +379,14 @@ EXPORT_SYMBOL(omap_mcbsp_pollwrite);
 
 int omap_mcbsp_pollread(unsigned int id, u16 *buf)
 {
-	u32 base = mcbsp[id].io_base;
+	u32 base;
+
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
+
+	base = mcbsp[id].io_base;
 	/* if frame sync error - clear the error */
 	if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) {
 		/* clear error */
@@ -512,8 +407,8 @@ int omap_mcbsp_pollread(unsigned int id, u16 *buf)
 				       (RRST),
 				       base + OMAP_MCBSP_REG_SPCR1);
 				udelay(10);
-				printk(KERN_ERR
-				       " Could not read from McBSP Register\n");
+				dev_err(mcbsp[id].dev, "Could not read from"
+					" McBSP%d Register\n", mcbsp[id].id);
 				return -2;
 			}
 		}
@@ -530,12 +425,15 @@ EXPORT_SYMBOL(omap_mcbsp_pollread);
 void omap_mcbsp_xmit_word(unsigned int id, u32 word)
 {
 	u32 io_base;
-	omap_mcbsp_word_length word_length = mcbsp[id].tx_word_length;
+	omap_mcbsp_word_length word_length;
 
-	if (omap_mcbsp_check(id) < 0)
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
 		return;
+	}
 
 	io_base = mcbsp[id].io_base;
+	word_length = mcbsp[id].tx_word_length;
 
 	wait_for_completion(&(mcbsp[id].tx_irq_completion));
 
@@ -549,11 +447,14 @@ u32 omap_mcbsp_recv_word(unsigned int id)
 {
 	u32 io_base;
 	u16 word_lsb, word_msb = 0;
-	omap_mcbsp_word_length word_length = mcbsp[id].rx_word_length;
+	omap_mcbsp_word_length word_length;
 
-	if (omap_mcbsp_check(id) < 0)
-		return -EINVAL;
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
 
+	word_length = mcbsp[id].rx_word_length;
 	io_base = mcbsp[id].io_base;
 
 	wait_for_completion(&(mcbsp[id].rx_irq_completion));
@@ -568,11 +469,20 @@ EXPORT_SYMBOL(omap_mcbsp_recv_word);
 
 int omap_mcbsp_spi_master_xmit_word_poll(unsigned int id, u32 word)
 {
-	u32 io_base = mcbsp[id].io_base;
-	omap_mcbsp_word_length tx_word_length = mcbsp[id].tx_word_length;
-	omap_mcbsp_word_length rx_word_length = mcbsp[id].rx_word_length;
+	u32 io_base;
+	omap_mcbsp_word_length tx_word_length;
+	omap_mcbsp_word_length rx_word_length;
 	u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0;
 
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
+
+	io_base = mcbsp[id].io_base;
+	tx_word_length = mcbsp[id].tx_word_length;
+	rx_word_length = mcbsp[id].rx_word_length;
+
 	if (tx_word_length != rx_word_length)
 		return -EINVAL;
 
@@ -586,7 +496,8 @@ int omap_mcbsp_spi_master_xmit_word_poll(unsigned int id, u32 word)
 			udelay(10);
 			OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST);
 			udelay(10);
-			printk(KERN_ERR "McBSP transmitter not ready\n");
+			dev_err(mcbsp[id].dev, "McBSP%d transmitter not "
+				"ready\n", mcbsp[id].id);
 			return -EAGAIN;
 		}
 	}
@@ -606,7 +517,8 @@ int omap_mcbsp_spi_master_xmit_word_poll(unsigned int id, u32 word)
 			udelay(10);
 			OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST);
 			udelay(10);
-			printk(KERN_ERR "McBSP receiver not ready\n");
+			dev_err(mcbsp[id].dev, "McBSP%d receiver not "
+				"ready\n", mcbsp[id].id);
 			return -EAGAIN;
 		}
 	}
@@ -622,11 +534,20 @@ EXPORT_SYMBOL(omap_mcbsp_spi_master_xmit_word_poll);
 
 int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 *word)
 {
-	u32 io_base = mcbsp[id].io_base, clock_word = 0;
-	omap_mcbsp_word_length tx_word_length = mcbsp[id].tx_word_length;
-	omap_mcbsp_word_length rx_word_length = mcbsp[id].rx_word_length;
+	u32 io_base, clock_word = 0;
+	omap_mcbsp_word_length tx_word_length;
+	omap_mcbsp_word_length rx_word_length;
 	u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0;
 
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
+
+	io_base = mcbsp[id].io_base;
+	tx_word_length = mcbsp[id].tx_word_length;
+	rx_word_length = mcbsp[id].rx_word_length;
+
 	if (tx_word_length != rx_word_length)
 		return -EINVAL;
 
@@ -640,7 +561,8 @@ int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 *word)
 			udelay(10);
 			OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST);
 			udelay(10);
-			printk(KERN_ERR "McBSP transmitter not ready\n");
+			dev_err(mcbsp[id].dev, "McBSP%d transmitter not "
+				"ready\n", mcbsp[id].id);
 			return -EAGAIN;
 		}
 	}
@@ -660,7 +582,8 @@ int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 *word)
 			udelay(10);
 			OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST);
 			udelay(10);
-			printk(KERN_ERR "McBSP receiver not ready\n");
+			dev_err(mcbsp[id].dev, "McBSP%d receiver not "
+				"ready\n", mcbsp[id].id);
 			return -EAGAIN;
 		}
 	}
@@ -691,20 +614,24 @@ int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer,
 	int dest_port = 0;
 	int sync_dev = 0;
 
-	if (omap_mcbsp_check(id) < 0)
-		return -EINVAL;
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
 
 	if (omap_request_dma(mcbsp[id].dma_tx_sync, "McBSP TX",
 				omap_mcbsp_tx_dma_callback,
 				&mcbsp[id],
 				&dma_tx_ch)) {
-		printk(KERN_ERR "OMAP-McBSP: Unable to request DMA channel for"
-				" McBSP%d TX. Trying IRQ based TX\n", id + 1);
+		dev_err(mcbsp[id].dev, " Unable to request DMA channel for "
+				"McBSP%d TX. Trying IRQ based TX\n",
+				mcbsp[id].id);
 		return -EAGAIN;
 	}
 	mcbsp[id].dma_tx_lch = dma_tx_ch;
 
-	DBG("TX DMA on channel %d\n", dma_tx_ch);
+	dev_err(mcbsp[id].dev, "McBSP%d TX DMA on channel %d\n", mcbsp[id].id,
+		dma_tx_ch);
 
 	init_completion(&(mcbsp[id].tx_dma_completion));
 
@@ -712,7 +639,7 @@ int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer,
 		src_port = OMAP_DMA_PORT_TIPB;
 		dest_port = OMAP_DMA_PORT_EMIFF;
 	}
-	if (cpu_is_omap24xx())
+	if (cpu_class_is_omap2())
 		sync_dev = mcbsp[id].dma_tx_sync;
 
 	omap_set_dma_transfer_params(mcbsp[id].dma_tx_lch,
@@ -748,20 +675,24 @@ int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer,
 	int dest_port = 0;
 	int sync_dev = 0;
 
-	if (omap_mcbsp_check(id) < 0)
-		return -EINVAL;
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
+		return -ENODEV;
+	}
 
 	if (omap_request_dma(mcbsp[id].dma_rx_sync, "McBSP RX",
 				omap_mcbsp_rx_dma_callback,
 				&mcbsp[id],
 				&dma_rx_ch)) {
-		printk(KERN_ERR "Unable to request DMA channel for McBSP%d RX."
-				" Trying IRQ based RX\n", id + 1);
+		dev_err(mcbsp[id].dev, "Unable to request DMA channel for "
+				"McBSP%d RX. Trying IRQ based RX\n",
+				mcbsp[id].id);
 		return -EAGAIN;
 	}
 	mcbsp[id].dma_rx_lch = dma_rx_ch;
 
-	DBG("RX DMA on channel %d\n", dma_rx_ch);
+	dev_err(mcbsp[id].dev, "McBSP%d RX DMA on channel %d\n", mcbsp[id].id,
+		dma_rx_ch);
 
 	init_completion(&(mcbsp[id].rx_dma_completion));
 
@@ -769,7 +700,7 @@ int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer,
 		src_port = OMAP_DMA_PORT_TIPB;
 		dest_port = OMAP_DMA_PORT_EMIFF;
 	}
-	if (cpu_is_omap24xx())
+	if (cpu_class_is_omap2())
 		sync_dev = mcbsp[id].dma_rx_sync;
 
 	omap_set_dma_transfer_params(mcbsp[id].dma_rx_lch,
@@ -808,8 +739,10 @@ void omap_mcbsp_set_spi_mode(unsigned int id,
 {
 	struct omap_mcbsp_reg_cfg mcbsp_cfg;
 
-	if (omap_mcbsp_check(id) < 0)
+	if (!omap_mcbsp_check_valid_id(id)) {
+		printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
 		return;
+	}
 
 	memset(&mcbsp_cfg, 0, sizeof(struct omap_mcbsp_reg_cfg));
 
@@ -870,182 +803,93 @@ EXPORT_SYMBOL(omap_mcbsp_set_spi_mode);
  * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
  * 730 has only 2 McBSP, and both of them are MPU peripherals.
  */
-struct omap_mcbsp_info {
-	u32 virt_base;
-	u8 dma_rx_sync, dma_tx_sync;
-	u16 rx_irq, tx_irq;
-};
+static int __init omap_mcbsp_probe(struct platform_device *pdev)
+{
+	struct omap_mcbsp_platform_data *pdata = pdev->dev.platform_data;
+	int id = pdev->id - 1;
+	int ret = 0;
 
-#ifdef CONFIG_ARCH_OMAP730
-static const struct omap_mcbsp_info mcbsp_730[] = {
-	[0] = { .virt_base = io_p2v(OMAP730_MCBSP1_BASE),
-		.dma_rx_sync = OMAP_DMA_MCBSP1_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP1_TX,
-		.rx_irq = INT_730_McBSP1RX,
-		.tx_irq = INT_730_McBSP1TX },
-	[1] = { .virt_base = io_p2v(OMAP730_MCBSP2_BASE),
-		.dma_rx_sync = OMAP_DMA_MCBSP3_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP3_TX,
-		.rx_irq = INT_730_McBSP2RX,
-		.tx_irq = INT_730_McBSP2TX },
-};
-#endif
-
-#ifdef CONFIG_ARCH_OMAP15XX
-static const struct omap_mcbsp_info mcbsp_1510[] = {
-	[0] = { .virt_base = OMAP1510_MCBSP1_BASE,
-		.dma_rx_sync = OMAP_DMA_MCBSP1_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP1_TX,
-		.rx_irq = INT_McBSP1RX,
-		.tx_irq = INT_McBSP1TX },
-	[1] = { .virt_base = io_p2v(OMAP1510_MCBSP2_BASE),
-		.dma_rx_sync = OMAP_DMA_MCBSP2_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP2_TX,
-		.rx_irq = INT_1510_SPI_RX,
-		.tx_irq = INT_1510_SPI_TX },
-	[2] = { .virt_base = OMAP1510_MCBSP3_BASE,
-		.dma_rx_sync = OMAP_DMA_MCBSP3_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP3_TX,
-		.rx_irq = INT_McBSP3RX,
-		.tx_irq = INT_McBSP3TX },
-};
-#endif
-
-#if defined(CONFIG_ARCH_OMAP16XX)
-static const struct omap_mcbsp_info mcbsp_1610[] = {
-	[0] = { .virt_base = OMAP1610_MCBSP1_BASE,
-		.dma_rx_sync = OMAP_DMA_MCBSP1_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP1_TX,
-		.rx_irq = INT_McBSP1RX,
-		.tx_irq = INT_McBSP1TX },
-	[1] = { .virt_base = io_p2v(OMAP1610_MCBSP2_BASE),
-		.dma_rx_sync = OMAP_DMA_MCBSP2_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP2_TX,
-		.rx_irq = INT_1610_McBSP2_RX,
-		.tx_irq = INT_1610_McBSP2_TX },
-	[2] = { .virt_base = OMAP1610_MCBSP3_BASE,
-		.dma_rx_sync = OMAP_DMA_MCBSP3_RX,
-		.dma_tx_sync = OMAP_DMA_MCBSP3_TX,
-		.rx_irq = INT_McBSP3RX,
-		.tx_irq = INT_McBSP3TX },
-};
-#endif
-
-#if defined(CONFIG_ARCH_OMAP24XX)
-static const struct omap_mcbsp_info mcbsp_24xx[] = {
-	[0] = { .virt_base = IO_ADDRESS(OMAP24XX_MCBSP1_BASE),
-		.dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX,
-		.dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX,
-		.rx_irq = INT_24XX_MCBSP1_IRQ_RX,
-		.tx_irq = INT_24XX_MCBSP1_IRQ_TX,
-		},
-	[1] = { .virt_base = IO_ADDRESS(OMAP24XX_MCBSP2_BASE),
-		.dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX,
-		.dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX,
-		.rx_irq = INT_24XX_MCBSP2_IRQ_RX,
-		.tx_irq = INT_24XX_MCBSP2_IRQ_TX,
-		},
-};
-#endif
+	if (!pdata) {
+		dev_err(&pdev->dev, "McBSP device initialized without"
+				"platform data\n");
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	dev_dbg(&pdev->dev, "Initializing OMAP McBSP (%d).\n", pdev->id);
+
+	if (id >= OMAP_MAX_MCBSP_COUNT) {
+		dev_err(&pdev->dev, "Invalid McBSP device id (%d)\n", id);
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	spin_lock_init(&mcbsp[id].lock);
+	mcbsp[id].id = id + 1;
+	mcbsp[id].free = 1;
+	mcbsp[id].dma_tx_lch = -1;
+	mcbsp[id].dma_rx_lch = -1;
+
+	mcbsp[id].io_base = pdata->virt_base;
+	/* Default I/O is IRQ based */
+	mcbsp[id].io_type = OMAP_MCBSP_IRQ_IO;
+	mcbsp[id].tx_irq = pdata->tx_irq;
+	mcbsp[id].rx_irq = pdata->rx_irq;
+	mcbsp[id].dma_rx_sync = pdata->dma_rx_sync;
+	mcbsp[id].dma_tx_sync = pdata->dma_tx_sync;
+
+	if (pdata->clk_name)
+		mcbsp[id].clk = clk_get(&pdev->dev, pdata->clk_name);
+	if (IS_ERR(mcbsp[id].clk)) {
+		mcbsp[id].free = 0;
+		dev_err(&pdev->dev,
+			"Invalid clock configuration for McBSP%d.\n",
+			mcbsp[id].id);
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	mcbsp[id].pdata = pdata;
+	mcbsp[id].dev = &pdev->dev;
+	platform_set_drvdata(pdev, &mcbsp[id]);
+
+exit:
+	return ret;
+}
 
-static int __init omap_mcbsp_init(void)
+static int omap_mcbsp_remove(struct platform_device *pdev)
 {
-	int mcbsp_count = 0, i;
-	static const struct omap_mcbsp_info *mcbsp_info;
+	struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
 
-	printk(KERN_INFO "Initializing OMAP McBSP system\n");
+	platform_set_drvdata(pdev, NULL);
+	if (mcbsp) {
 
-#ifdef CONFIG_ARCH_OMAP1
-	mcbsp_dsp_ck = clk_get(0, "dsp_ck");
-	if (IS_ERR(mcbsp_dsp_ck)) {
-		printk(KERN_ERR "mcbsp: could not acquire dsp_ck handle.\n");
-		return PTR_ERR(mcbsp_dsp_ck);
-	}
-	mcbsp_api_ck = clk_get(0, "api_ck");
-	if (IS_ERR(mcbsp_api_ck)) {
-		printk(KERN_ERR "mcbsp: could not acquire api_ck handle.\n");
-		return PTR_ERR(mcbsp_api_ck);
-	}
-	mcbsp_dspxor_ck = clk_get(0, "dspxor_ck");
-	if (IS_ERR(mcbsp_dspxor_ck)) {
-		printk(KERN_ERR "mcbsp: could not acquire dspxor_ck handle.\n");
-		return PTR_ERR(mcbsp_dspxor_ck);
-	}
-#endif
-#ifdef CONFIG_ARCH_OMAP2
-	mcbsp1_ick = clk_get(0, "mcbsp1_ick");
-	if (IS_ERR(mcbsp1_ick)) {
-		printk(KERN_ERR "mcbsp: could not acquire "
-				"mcbsp1_ick handle.\n");
-		return PTR_ERR(mcbsp1_ick);
-	}
-	mcbsp1_fck = clk_get(0, "mcbsp1_fck");
-	if (IS_ERR(mcbsp1_fck)) {
-		printk(KERN_ERR "mcbsp: could not acquire "
-				"mcbsp1_fck handle.\n");
-		return PTR_ERR(mcbsp1_fck);
-	}
-	mcbsp2_ick = clk_get(0, "mcbsp2_ick");
-	if (IS_ERR(mcbsp2_ick)) {
-		printk(KERN_ERR "mcbsp: could not acquire "
-				"mcbsp2_ick handle.\n");
-		return PTR_ERR(mcbsp2_ick);
-	}
-	mcbsp2_fck = clk_get(0, "mcbsp2_fck");
-	if (IS_ERR(mcbsp2_fck)) {
-		printk(KERN_ERR "mcbsp: could not acquire "
-				"mcbsp2_fck handle.\n");
-		return PTR_ERR(mcbsp2_fck);
-	}
-#endif
+		if (mcbsp->pdata && mcbsp->pdata->ops &&
+				mcbsp->pdata->ops->free)
+			mcbsp->pdata->ops->free(mcbsp->id);
 
-#ifdef CONFIG_ARCH_OMAP730
-	if (cpu_is_omap730()) {
-		mcbsp_info = mcbsp_730;
-		mcbsp_count = ARRAY_SIZE(mcbsp_730);
-	}
-#endif
-#ifdef CONFIG_ARCH_OMAP15XX
-	if (cpu_is_omap15xx()) {
-		mcbsp_info = mcbsp_1510;
-		mcbsp_count = ARRAY_SIZE(mcbsp_1510);
-	}
-#endif
-#if defined(CONFIG_ARCH_OMAP16XX)
-	if (cpu_is_omap16xx()) {
-		mcbsp_info = mcbsp_1610;
-		mcbsp_count = ARRAY_SIZE(mcbsp_1610);
-	}
-#endif
-#if defined(CONFIG_ARCH_OMAP24XX)
-	if (cpu_is_omap24xx()) {
-		mcbsp_info = mcbsp_24xx;
-		mcbsp_count = ARRAY_SIZE(mcbsp_24xx);
-		omap2_mcbsp2_mux_setup();
-	}
-#endif
-	for (i = 0; i < OMAP_MAX_MCBSP_COUNT ; i++) {
-		if (i >= mcbsp_count) {
-			mcbsp[i].io_base = 0;
-			mcbsp[i].free = 0;
-			continue;
-		}
-		mcbsp[i].id = i + 1;
-		mcbsp[i].free = 1;
-		mcbsp[i].dma_tx_lch = -1;
-		mcbsp[i].dma_rx_lch = -1;
-
-		mcbsp[i].io_base = mcbsp_info[i].virt_base;
-		/* Default I/O is IRQ based */
-		mcbsp[i].io_type = OMAP_MCBSP_IRQ_IO;
-		mcbsp[i].tx_irq = mcbsp_info[i].tx_irq;
-		mcbsp[i].rx_irq = mcbsp_info[i].rx_irq;
-		mcbsp[i].dma_rx_sync = mcbsp_info[i].dma_rx_sync;
-		mcbsp[i].dma_tx_sync = mcbsp_info[i].dma_tx_sync;
-		spin_lock_init(&mcbsp[i].lock);
+		clk_disable(mcbsp->clk);
+		clk_put(mcbsp->clk);
+
+		mcbsp->clk = NULL;
+		mcbsp->free = 0;
+		mcbsp->dev = NULL;
 	}
 
 	return 0;
 }
 
-arch_initcall(omap_mcbsp_init);
+static struct platform_driver omap_mcbsp_driver = {
+	.probe		= omap_mcbsp_probe,
+	.remove		= omap_mcbsp_remove,
+	.driver		= {
+		.name	= "omap-mcbsp",
+	},
+};
+
+int __init omap_mcbsp_init(void)
+{
+	/* Register the McBSP driver */
+	return platform_driver_register(&omap_mcbsp_driver);
+}
+
diff --git a/include/asm-arm/arch-omap/mcbsp.h b/include/asm-arm/arch-omap/mcbsp.h
index c7a0cc1..26c78f6 100644
--- a/include/asm-arm/arch-omap/mcbsp.h
+++ b/include/asm-arm/arch-omap/mcbsp.h
@@ -24,7 +24,11 @@
 #ifndef __ASM_ARCH_OMAP_MCBSP_H
 #define __ASM_ARCH_OMAP_MCBSP_H
 
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+
 #include <asm/hardware.h>
+#include <asm/arch/clock.h>
 
 #define OMAP730_MCBSP1_BASE	0xfffb1000
 #define OMAP730_MCBSP2_BASE	0xfffb1800
@@ -40,6 +44,9 @@
 #define OMAP24XX_MCBSP1_BASE	0x48074000
 #define OMAP24XX_MCBSP2_BASE	0x48076000
 
+#define OMAP34XX_MCBSP1_BASE	0x48074000
+#define OMAP34XX_MCBSP2_BASE	0x49022000
+
 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP730)
 
 #define OMAP_MCBSP_REG_DRR2	0x00
@@ -74,7 +81,8 @@
 #define OMAP_MCBSP_REG_XCERG	0x3A
 #define OMAP_MCBSP_REG_XCERH	0x3C
 
-#define OMAP_MAX_MCBSP_COUNT 3
+#define OMAP_MAX_MCBSP_COUNT	3
+#define MAX_MCBSP_CLOCKS	3
 
 #define AUDIO_MCBSP_DATAWRITE	(OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1)
 #define AUDIO_MCBSP_DATAREAD	(OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1)
@@ -117,7 +125,8 @@
 #define OMAP_MCBSP_REG_XCERG	0x74
 #define OMAP_MCBSP_REG_XCERH	0x78
 
-#define OMAP_MAX_MCBSP_COUNT 2
+#define OMAP_MAX_MCBSP_COUNT	2
+#define MAX_MCBSP_CLOCKS	2
 
 #define AUDIO_MCBSP_DATAWRITE	(OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR1)
 #define AUDIO_MCBSP_DATAREAD	(OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR1)
@@ -298,6 +307,55 @@ struct omap_mcbsp_spi_cfg {
 	omap_mcbsp_word_length		word_length;
 };
 
+/* Platform specific configuration */
+struct omap_mcbsp_ops {
+	void (*request)(unsigned int);
+	void (*free)(unsigned int);
+	int (*check)(unsigned int);
+};
+
+struct omap_mcbsp_platform_data {
+	u32 virt_base;
+	u8 dma_rx_sync, dma_tx_sync;
+	u16 rx_irq, tx_irq;
+	struct omap_mcbsp_ops *ops;
+	char const *clk_name;
+};
+
+struct omap_mcbsp {
+	struct device *dev;
+	u32 io_base;
+	u8 id;
+	u8 free;
+	omap_mcbsp_word_length rx_word_length;
+	omap_mcbsp_word_length tx_word_length;
+
+	omap_mcbsp_io_type_t io_type; /* IRQ or poll */
+	/* IRQ based TX/RX */
+	int rx_irq;
+	int tx_irq;
+
+	/* DMA stuff */
+	u8 dma_rx_sync;
+	short dma_rx_lch;
+	u8 dma_tx_sync;
+	short dma_tx_lch;
+
+	/* Completion queues */
+	struct completion tx_irq_completion;
+	struct completion rx_irq_completion;
+	struct completion tx_dma_completion;
+	struct completion rx_dma_completion;
+
+	/* Protect the field .free, while checking if the mcbsp is in use */
+	spinlock_t lock;
+	struct omap_mcbsp_platform_data *pdata;
+	struct clk *clk;
+};
+
+int omap_mcbsp_init(void);
+void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
+					int size);
 void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg * config);
 int omap_mcbsp_request(unsigned int id);
 void omap_mcbsp_free(unsigned int id);