usb: m66592-udc platform data on_chip support

Convert the m66592-udc driver to use the on_chip flag
from platform data to enable on chip behaviour instead
of relying on CONFIG_SUPERH_BUILT_IN_M66592 ugliness.

This makes the code cleaner and also allows us to support
both external and internal m66592 with the same kernel.

It also makes the Kconfig part more future proof since
we with this patch can add support for new processors
with on-chip m66592 without modifying the Kconfig.

The patch adds a m66592 header file for platform data
and ties in platform data to the existing m66592 devices.

Signed-off-by: Magnus Damm <[e-mail]>
Signed-off-by: Paul Mundt <[e-mail]>

arch/sh/boards/mach-highlander/setup.c

···
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/usb/r8a66597.h>
+#include <linux/usb/m66592.h>
 #include <net/ax88796.h>
 #include <asm/machvec.h>
 #include <mach/highlander.h>
···
 	.resource	= r8a66597_usb_host_resources,
 };
 
+static struct m66592_platdata usbf_platdata = {
+	.xtal = M66592_PLATDATA_XTAL_24MHZ,
+	.vif = 1,
+};
+
 static struct resource m66592_usb_peripheral_resources[] = {
 	[0] = {
 		.name	= "m66592_udc",
···
 	.dev = {
 		.dma_mask		= NULL,		/* don't use dma */
 		.coherent_dma_mask	= 0xffffffff,
+		.platform_data		= &usbf_platdata,
 	},
 	.num_resources	= ARRAY_SIZE(m66592_usb_peripheral_resources),
 	.resource	= m66592_usb_peripheral_resources,

arch/sh/boards/mach-x3proto/setup.c

···
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/usb/r8a66597.h>
+#include <linux/usb/m66592.h>
 #include <asm/ilsel.h>
 
 static struct resource heartbeat_resources[] = {
···
 	.resource	= r8a66597_usb_host_resources,
 };
 
+static struct m66592_platdata usbf_platdata = {
+	.xtal = M66592_PLATDATA_XTAL_24MHZ,
+	.vif = 1,
+};
+
 static struct resource m66592_usb_peripheral_resources[] = {
 	[0] = {
 		.name	= "m66592_udc",
···
 	.dev = {
 		.dma_mask		= NULL,		/* don't use dma */
 		.coherent_dma_mask	= 0xffffffff,
+		.platform_data		= &usbf_platdata,
 	},
 	.num_resources	= ARRAY_SIZE(m66592_usb_peripheral_resources),
 	.resource	= m66592_usb_peripheral_resources,

arch/sh/kernel/cpu/sh4a/setup-sh7722.c

···
 #include <linux/serial_sci.h>
 #include <linux/mm.h>
 #include <linux/uio_driver.h>
+#include <linux/usb/m66592.h>
 #include <linux/sh_timer.h>
 #include <asm/clock.h>
 #include <asm/mmzone.h>
···
 	.resource	= rtc_resources,
 };
 
+static struct m66592_platdata usbf_platdata = {
+	.on_chip = 1,
+};
+
 static struct resource usbf_resources[] = {
 	[0] = {
-		.name	= "m66592_udc",
+		.name	= "USBF",
 		.start	= 0x04480000,
 		.end	= 0x044800FF,
 		.flags	= IORESOURCE_MEM,
···
 	.dev = {
 		.dma_mask		= NULL,
 		.coherent_dma_mask	= 0xffffffff,
+		.platform_data		= &usbf_platdata,
 	},
 	.num_resources	= ARRAY_SIZE(usbf_resources),
 	.resource	= usbf_resources,

drivers/usb/gadget/Kconfig

···
 	default USB_GADGET
 	select USB_GADGET_SELECTED
 
-config SUPERH_BUILT_IN_M66592
-	boolean "Enable SuperH built-in USB like the M66592"
-	depends on USB_GADGET_M66592 && CPU_SUBTYPE_SH7722
-	help
-	   SH7722 has USB like the M66592.
-
-	   The transfer rate is very slow when use "Ethernet Gadget".
-	   However, this problem is improved if change a value of
-	   NET_IP_ALIGN to 4.
-
 #
 # Controllers available only in discrete form (and all PCI controllers)
 #

drivers/usb/gadget/m66592-udc.c

···
 
 #include "m66592-udc.h"
 
-
 MODULE_DESCRIPTION("M66592 USB gadget driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Yoshihiro Shimoda");
 MODULE_ALIAS("platform:m66592_udc");
 
-#define DRIVER_VERSION	"26 Jun 2009"
-
-/* module parameters */
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
-static unsigned short endian = M66592_LITTLE;
-module_param(endian, ushort, 0644);
-MODULE_PARM_DESC(endian, "data endian: big=0, little=0 (default=0)");
-#else
-static unsigned short clock = M66592_XTAL24;
-module_param(clock, ushort, 0644);
-MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0 "
-		"(default=16384)");
-
-static unsigned short vif = M66592_LDRV;
-module_param(vif, ushort, 0644);
-MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0 (default=32768)");
-
-static unsigned short endian;
-module_param(endian, ushort, 0644);
-MODULE_PARM_DESC(endian, "data endian: big=256, little=0 (default=0)");
-
-static unsigned short irq_sense = M66592_INTL;
-module_param(irq_sense, ushort, 0644);
-MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=2, falling edge=0 "
-		"(default=2)");
-#endif
+#define DRIVER_VERSION	"21 July 2009"
 
 static const char udc_name[] = "m66592_udc";
 static const char *m66592_ep_name[] = {
···
 static inline void pipe_change(struct m66592 *m66592, u16 pipenum)
 {
 	struct m66592_ep *ep = m66592->pipenum2ep[pipenum];
+	unsigned short mbw;
 
 	if (ep->use_dma)
 		return;
···
 
 	ndelay(450);
 
-	m66592_bset(m66592, M66592_MBW, ep->fifosel);
+	if (m66592->pdata->on_chip)
+		mbw = M66592_MBW_32;
+	else
+		mbw = M66592_MBW_16;
+
+	m66592_bset(m66592, mbw, ep->fifosel);
 }
 
 static int pipe_buffer_setting(struct m66592 *m66592,
···
 static void pipe_initialize(struct m66592_ep *ep)
 {
 	struct m66592 *m66592 = ep->m66592;
+	unsigned short mbw;
 
 	m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel);
 
···
 
 		ndelay(450);
 
-		m66592_bset(m66592, M66592_MBW, ep->fifosel);
+		if (m66592->pdata->on_chip)
+			mbw = M66592_MBW_32;
+		else
+			mbw = M66592_MBW_16;
+
+		m66592_bset(m66592, mbw, ep->fifosel);
 	}
 }
 
···
 			ep->fifosel = M66592_D0FIFOSEL;
 			ep->fifoctr = M66592_D0FIFOCTR;
 			ep->fifotrn = M66592_D0FIFOTRN;
-#if !defined(CONFIG_SUPERH_BUILT_IN_M66592)
-		} else if (m66592->num_dma == 1) {
+		} else if (!m66592->pdata->on_chip && m66592->num_dma == 1) {
 			m66592->num_dma++;
 			ep->use_dma = 1;
 			ep->fifoaddr = M66592_D1FIFO;
 			ep->fifosel = M66592_D1FIFOSEL;
 			ep->fifoctr = M66592_D1FIFOCTR;
 			ep->fifotrn = M66592_D1FIFOTRN;
-#endif
 		} else {
 			ep->use_dma = 0;
 			ep->fifoaddr = M66592_CFIFO;
···
 	}
 }
 
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
 static void init_controller(struct m66592 *m66592)
 {
-	m66592_bset(m66592, M66592_HSE, M66592_SYSCFG);		/* High spd */
-	m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
-	m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
-	m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
+	unsigned int endian;
 
-	/* This is a workaound for SH7722 2nd cut */
-	m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
-	m66592_bset(m66592, 0x1000, M66592_TESTMODE);
-	m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);
+	if (m66592->pdata->on_chip) {
+		if (m66592->pdata->endian)
+			endian = 0; /* big endian */
+		else
+			endian = M66592_LITTLE; /* little endian */
 
-	m66592_bset(m66592, M66592_INTL, M66592_INTENB1);
+		m66592_bset(m66592, M66592_HSE, M66592_SYSCFG);	/* High spd */
+		m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
+		m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
+		m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
 
-	m66592_write(m66592, 0, M66592_CFBCFG);
-	m66592_write(m66592, 0, M66592_D0FBCFG);
-	m66592_bset(m66592, endian, M66592_CFBCFG);
-	m66592_bset(m66592, endian, M66592_D0FBCFG);
+		/* This is a workaound for SH7722 2nd cut */
+		m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
+		m66592_bset(m66592, 0x1000, M66592_TESTMODE);
+		m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);
+
+		m66592_bset(m66592, M66592_INTL, M66592_INTENB1);
+
+		m66592_write(m66592, 0, M66592_CFBCFG);
+		m66592_write(m66592, 0, M66592_D0FBCFG);
+		m66592_bset(m66592, endian, M66592_CFBCFG);
+		m66592_bset(m66592, endian, M66592_D0FBCFG);
+	} else {
+		unsigned int clock, vif, irq_sense;
+
+		if (m66592->pdata->endian)
+			endian = M66592_BIGEND; /* big endian */
+		else
+			endian = 0; /* little endian */
+
+		if (m66592->pdata->vif)
+			vif = M66592_LDRV; /* 3.3v */
+		else
+			vif = 0; /* 1.5v */
+
+		switch (m66592->pdata->xtal) {
+		case M66592_PLATDATA_XTAL_12MHZ:
+			clock = M66592_XTAL12;
+			break;
+		case M66592_PLATDATA_XTAL_24MHZ:
+			clock = M66592_XTAL24;
+			break;
+		case M66592_PLATDATA_XTAL_48MHZ:
+			clock = M66592_XTAL48;
+			break;
+		default:
+			pr_warning("m66592-udc: xtal configuration error\n");
+			clock = 0;
+		}
+
+		switch (m66592->irq_trigger) {
+		case IRQF_TRIGGER_LOW:
+			irq_sense = M66592_INTL;
+			break;
+		case IRQF_TRIGGER_FALLING:
+			irq_sense = 0;
+			break;
+		default:
+			pr_warning("m66592-udc: irq trigger config error\n");
+			irq_sense = 0;
+		}
+
+		m66592_bset(m66592,
+			    (vif & M66592_LDRV) | (endian & M66592_BIGEND),
+			    M66592_PINCFG);
+		m66592_bset(m66592, M66592_HSE, M66592_SYSCFG);	/* High spd */
+		m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL,
+			    M66592_SYSCFG);
+		m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
+		m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
+		m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
+
+		m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
+
+		msleep(3);
+
+		m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
+
+		msleep(1);
+
+		m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
+
+		m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
+		m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
+			     M66592_DMA0CFG);
+	}
 }
-#else	/* #if defined(CONFIG_SUPERH_BUILT_IN_M66592) */
-static void init_controller(struct m66592 *m66592)
-{
-	m66592_bset(m66592, (vif & M66592_LDRV) | (endian & M66592_BIGEND),
-			M66592_PINCFG);
-	m66592_bset(m66592, M66592_HSE, M66592_SYSCFG);		/* High spd */
-	m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL, M66592_SYSCFG);
-
-	m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
-	m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
-	m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
-
-	m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
-
-	msleep(3);
-
-	m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
-
-	msleep(1);
-
-	m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
-
-	m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
-	m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
-			M66592_DMA0CFG);
-}
-#endif	/* #if defined(CONFIG_SUPERH_BUILT_IN_M66592) */
 
 static void disable_controller(struct m66592 *m66592)
 {
-#if !defined(CONFIG_SUPERH_BUILT_IN_M66592)
-	m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
-	udelay(1);
-	m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
-	udelay(1);
-	m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
-	udelay(1);
-	m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
-#endif
+	if (!m66592->pdata->on_chip) {
+		m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
+		udelay(1);
+		m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
+		udelay(1);
+		m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
+		udelay(1);
+		m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
+	}
 }
 
 static void m66592_start_xclock(struct m66592 *m66592)
 {
-#if !defined(CONFIG_SUPERH_BUILT_IN_M66592)
 	u16 tmp;
 
-	tmp = m66592_read(m66592, M66592_SYSCFG);
-	if (!(tmp & M66592_XCKE))
-		m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
-#endif
+	if (!m66592->pdata->on_chip) {
+		tmp = m66592_read(m66592, M66592_SYSCFG);
+		if (!(tmp & M66592_XCKE))
+			m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
+	}
 }
 
 /*-------------------------------------------------------------------------*/
···
 	intsts0 = m66592_read(m66592, M66592_INTSTS0);
 	intenb0 = m66592_read(m66592, M66592_INTENB0);
 
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
-	if (!intsts0 && !intenb0) {
+	if (m66592->pdata->on_chip && !intsts0 && !intenb0) {
 		/*
 		 * When USB clock stops, it cannot read register. Even if a
 		 * clock stops, the interrupt occurs. So this driver turn on
···
 		intsts0 = m66592_read(m66592, M66592_INTSTS0);
 		intenb0 = m66592_read(m66592, M66592_INTENB0);
 	}
-#endif
 
 	savepipe = m66592_read(m66592, M66592_CFIFOSEL);
 
···
 	iounmap(m66592->reg);
 	free_irq(platform_get_irq(pdev, 0), m66592);
 	m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592) && defined(CONFIG_HAVE_CLK)
-	clk_disable(m66592->clk);
-	clk_put(m66592->clk);
+#ifdef CONFIG_HAVE_CLK
+	if (m66592->pdata->on_chip) {
+		clk_disable(m66592->clk);
+		clk_put(m66592->clk);
+	}
 #endif
 	kfree(m66592);
 	return 0;
···
 
 static int __init m66592_probe(struct platform_device *pdev)
 {
-	struct resource *res;
-	int irq;
+	struct resource *res, *ires;
 	void __iomem *reg = NULL;
 	struct m66592 *m66592 = NULL;
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592) && defined(CONFIG_HAVE_CLK)
+#ifdef CONFIG_HAVE_CLK
 	char clk_name[8];
 #endif
 	int ret = 0;
···
 		goto clean_up;
 	}
 
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
+	ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!ires) {
 		ret = -ENODEV;
-		pr_err("platform_get_irq error.\n");
+		dev_err(&pdev->dev,
+			"platform_get_resource IORESOURCE_IRQ error.\n");
 		goto clean_up;
 	}
 
···
 		goto clean_up;
 	}
 
+	if (pdev->dev.platform_data == NULL) {
+		dev_err(&pdev->dev, "no platform data\n");
+		ret = -ENODEV;
+		goto clean_up;
+	}
+
 	/* initialize ucd */
 	m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
 	if (m66592 == NULL) {
 		pr_err("kzalloc error\n");
 		goto clean_up;
 	}
+
+	m66592->pdata = pdev->dev.platform_data;
+	m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
 
 	spin_lock_init(&m66592->lock);
 	dev_set_drvdata(&pdev->dev, m66592);
···
 	m66592->timer.data = (unsigned long)m66592;
 	m66592->reg = reg;
 
-	ret = request_irq(irq, m66592_irq, IRQF_DISABLED | IRQF_SHARED,
+	ret = request_irq(ires->start, m66592_irq, IRQF_DISABLED | IRQF_SHARED,
 			udc_name, m66592);
 	if (ret < 0) {
 		pr_err("request_irq error (%d)\n", ret);
 		goto clean_up;
 	}
 
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592) && defined(CONFIG_HAVE_CLK)
-	snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id);
-	m66592->clk = clk_get(&pdev->dev, clk_name);
-	if (IS_ERR(m66592->clk)) {
-		dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
-		ret = PTR_ERR(m66592->clk);
-		goto clean_up2;
+#ifdef CONFIG_HAVE_CLK
+	if (m66592->pdata->on_chip) {
+		snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id);
+		m66592->clk = clk_get(&pdev->dev, clk_name);
+		if (IS_ERR(m66592->clk)) {
+			dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
+				clk_name);
+			ret = PTR_ERR(m66592->clk);
+			goto clean_up2;
+		}
+		clk_enable(m66592->clk);
 	}
-	clk_enable(m66592->clk);
 #endif
 	INIT_LIST_HEAD(&m66592->gadget.ep_list);
 	m66592->gadget.ep0 = &m66592->ep[0].ep;
···
 	return 0;
 
 clean_up3:
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592) && defined(CONFIG_HAVE_CLK)
-	clk_disable(m66592->clk);
-	clk_put(m66592->clk);
+#ifdef CONFIG_HAVE_CLK
+	if (m66592->pdata->on_chip) {
+		clk_disable(m66592->clk);
+		clk_put(m66592->clk);
+	}
 clean_up2:
 #endif
-	free_irq(irq, m66592);
+	free_irq(ires->start, m66592);
 clean_up:
 	if (m66592) {
 		if (m66592->ep0_req)

drivers/usb/gadget/m66592-udc.h

···
 #ifndef __M66592_UDC_H__
 #define __M66592_UDC_H__
 
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592) && defined(CONFIG_HAVE_CLK)
+#ifdef CONFIG_HAVE_CLK
 #include <linux/clk.h>
 #endif
+
+#include <linux/usb/m66592.h>
 
 #define M66592_SYSCFG		0x00
 #define M66592_XTAL		0xC000	/* b15-14: Crystal selection */
···
 #define   M66592_P_TST_J	 0x0001		/* PERI TEST J */
 #define   M66592_P_TST_NORMAL	 0x0000		/* PERI Normal Mode */
 
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
+/* built-in registers */
 #define M66592_CFBCFG		0x0A
 #define M66592_D0FBCFG		0x0C
 #define M66592_LITTLE		0x0100	/* b8: Little endian mode */
-#else
+/* external chip case */
 #define M66592_PINCFG		0x0A
 #define M66592_LDRV		0x8000	/* b15: Drive Current Adjust */
 #define M66592_BIGEND		0x0100	/* b8: Big endian mode */
···
 #define M66592_PKTM		0x0020	/* b5: Packet mode */
 #define M66592_DENDE		0x0010	/* b4: Dend enable */
 #define M66592_OBUS		0x0004	/* b2: OUTbus mode */
-#endif	/* #if defined(CONFIG_SUPERH_BUILT_IN_M66592) */
 
+/* common case */
 #define M66592_CFIFO		0x10
 #define M66592_D0FIFO		0x14
 #define M66592_D1FIFO		0x18
···
 #define M66592_REW		0x4000	/* b14: Buffer rewind */
 #define M66592_DCLRM		0x2000	/* b13: DMA buffer clear mode */
 #define M66592_DREQE		0x1000	/* b12: DREQ output enable */
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
-#define M66592_MBW		0x0800	/* b11: Maximum bit width for FIFO */
-#else
-#define M66592_MBW		0x0400	/* b10: Maximum bit width for FIFO */
-#define   M66592_MBW_8		 0x0000   /*  8bit */
-#define   M66592_MBW_16		 0x0400   /* 16bit */
-#endif	/* #if defined(CONFIG_SUPERH_BUILT_IN_M66592) */
+#define M66592_MBW_8		0x0000   /*  8bit */
+#define M66592_MBW_16		0x0400   /* 16bit */
+#define M66592_MBW_32		0x0800   /* 32bit */
 #define M66592_TRENB		0x0200	/* b9: Transaction counter enable */
 #define M66592_TRCLR		0x0100	/* b8: Transaction counter clear */
 #define M66592_DEZPM		0x0080	/* b7: Zero-length packet mode */
···
 struct m66592 {
 	spinlock_t		lock;
 	void __iomem		*reg;
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592) && defined(CONFIG_HAVE_CLK)
+#ifdef CONFIG_HAVE_CLK
 	struct clk *clk;
 #endif
+	struct m66592_platdata	*pdata;
+	unsigned long		irq_trigger;
 
 	struct usb_gadget		gadget;
 	struct usb_gadget_driver	*driver;
···
 {
 	unsigned long fifoaddr = (unsigned long)m66592->reg + offset;
 
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
-	len = (len + 3) / 4;
-	insl(fifoaddr, buf, len);
-#else
-	len = (len + 1) / 2;
-	insw(fifoaddr, buf, len);
-#endif
+	if (m66592->pdata->on_chip) {
+		len = (len + 3) / 4;
+		insl(fifoaddr, buf, len);
+	} else {
+		len = (len + 1) / 2;
+		insw(fifoaddr, buf, len);
+	}
 }
 
 static inline void m66592_write(struct m66592 *m66592, u16 val,
···
 		void *buf, unsigned long len)
 {
 	unsigned long fifoaddr = (unsigned long)m66592->reg + offset;
-#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
-	unsigned long count;
-	unsigned char *pb;
-	int i;
 
-	count = len / 4;
-	outsl(fifoaddr, buf, count);
+	if (m66592->pdata->on_chip) {
+		unsigned long count;
+		unsigned char *pb;
+		int i;
 
-	if (len & 0x00000003) {
-		pb = buf + count * 4;
-		for (i = 0; i < (len & 0x00000003); i++) {
-			if (m66592_read(m66592, M66592_CFBCFG))	/* little */
-				outb(pb[i], fifoaddr + (3 - i));
-			else
-				outb(pb[i], fifoaddr + i);
+		count = len / 4;
+		outsl(fifoaddr, buf, count);
+
+		if (len & 0x00000003) {
+			pb = buf + count * 4;
+			for (i = 0; i < (len & 0x00000003); i++) {
+				if (m66592_read(m66592, M66592_CFBCFG))	/* le */
+					outb(pb[i], fifoaddr + (3 - i));
+				else
+					outb(pb[i], fifoaddr + i);
+			}
+		}
+	} else {
+		unsigned long odd = len & 0x0001;
+
+		len = len / 2;
+		outsw(fifoaddr, buf, len);
+		if (odd) {
+			unsigned char *p = buf + len*2;
+			outb(*p, fifoaddr);
 		}
 	}
-#else
-	unsigned long odd = len & 0x0001;
-
-	len = len / 2;
-	outsw(fifoaddr, buf, len);
-	if (odd) {
-		unsigned char *p = buf + len*2;
-		outb(*p, fifoaddr);
-	}
-#endif	/* #if defined(CONFIG_SUPERH_BUILT_IN_M66592) */
 }
 
 static inline void m66592_mdfy(struct m66592 *m66592, u16 val, u16 pat,

include/linux/usb/m66592.h

···
+/*
+ * M66592 driver platform data
+ *
+ * Copyright (C) 2009  Renesas Solutions Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef __LINUX_USB_M66592_H
+#define __LINUX_USB_M66592_H
+
+#define M66592_PLATDATA_XTAL_12MHZ	0x01
+#define M66592_PLATDATA_XTAL_24MHZ	0x02
+#define M66592_PLATDATA_XTAL_48MHZ	0x03
+
+struct m66592_platdata {
+	/* one = on chip controller, zero = external controller */
+	unsigned	on_chip:1;
+
+	/* one = big endian, zero = little endian */
+	unsigned	endian:1;
+
+	/* (external controller only) M66592_PLATDATA_XTAL_nnMHZ */
+	unsigned	xtal:2;
+
+	/* (external controller only) one = 3.3V, zero = 1.5V */
+	unsigned	vif:1;
+
+};
+
+#endif /* __LINUX_USB_M66592_H */
+