usb: r8a66597-hcd platform data on_chip support

Convert the r8a66597-hcd driver to use the on_chip flag
from platform data to enable on chip behaviour instead
of relying on CONFIG_SUPERH_ON_CHIP_R8A66597 ugliness.

This makes the code cleaner and also allows us to support
both external and internal r8a66597 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 r8a66597 without modifying the Kconfig.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 141 insertions, 129 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 1a920c70b5a1..f21ca7d27a43 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -336,13 +336,6 @@ config USB_R8A66597_HCD
           To compile this driver as a module, choose M here: the
           module will be called r8a66597-hcd.
 
-config SUPERH_ON_CHIP_R8A66597
-        boolean "Enable SuperH on-chip R8A66597 USB"
-        depends on USB_R8A66597_HCD && (CPU_SUBTYPE_SH7366 || CPU_SUBTYPE_SH7723 || CPU_SUBTYPE_SH7724)
-        help
-           This driver enables support for the on-chip R8A66597 in the
-           SH7366, SH7723 and SH7724 processors.
-
 config USB_WHCI_HCD
         tristate "Wireless USB Host Controller Interface (WHCI) driver (EXPERIMENTAL)"
         depends on EXPERIMENTAL
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 09895a97c10b..82dce3e0d4d7 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -91,43 +91,43 @@ static int r8a66597_clock_enable(struct r8a66597 *r8a66597)
         u16 tmp;
         int i = 0;
 
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
-#if defined(CONFIG_HAVE_CLK)
-        clk_enable(r8a66597->clk);
+        if (r8a66597->pdata->on_chip) {
+#ifdef CONFIG_HAVE_CLK
+                clk_enable(r8a66597->clk);
 #endif
-        do {
-                r8a66597_write(r8a66597, SCKE, SYSCFG0);
-                tmp = r8a66597_read(r8a66597, SYSCFG0);
-                if (i++ > 1000) {
-                        printk(KERN_ERR "r8a66597: register access fail.\n");
-                        return -ENXIO;
-                }
-        } while ((tmp & SCKE) != SCKE);
-        r8a66597_write(r8a66597, 0x04, 0x02);
-#else
-        do {
-                r8a66597_write(r8a66597, USBE, SYSCFG0);
-                tmp = r8a66597_read(r8a66597, SYSCFG0);
-                if (i++ > 1000) {
-                        printk(KERN_ERR "r8a66597: register access fail.\n");
-                        return -ENXIO;
-                }
-        } while ((tmp & USBE) != USBE);
-        r8a66597_bclr(r8a66597, USBE, SYSCFG0);
-        r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata), XTAL,
-                        SYSCFG0);
+                do {
+                        r8a66597_write(r8a66597, SCKE, SYSCFG0);
+                        tmp = r8a66597_read(r8a66597, SYSCFG0);
+                        if (i++ > 1000) {
+                                printk(KERN_ERR "r8a66597: reg access fail.\n");
+                                return -ENXIO;
+                        }
+                } while ((tmp & SCKE) != SCKE);
+                r8a66597_write(r8a66597, 0x04, 0x02);
+        } else {
+                do {
+                        r8a66597_write(r8a66597, USBE, SYSCFG0);
+                        tmp = r8a66597_read(r8a66597, SYSCFG0);
+                        if (i++ > 1000) {
+                                printk(KERN_ERR "r8a66597: reg access fail.\n");
+                                return -ENXIO;
+                        }
+                } while ((tmp & USBE) != USBE);
+                r8a66597_bclr(r8a66597, USBE, SYSCFG0);
+                r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
+                              XTAL, SYSCFG0);
 
-        i = 0;
-        r8a66597_bset(r8a66597, XCKE, SYSCFG0);
-        do {
-                msleep(1);
-                tmp = r8a66597_read(r8a66597, SYSCFG0);
-                if (i++ > 500) {
-                        printk(KERN_ERR "r8a66597: register access fail.\n");
-                        return -ENXIO;
-                }
-        } while ((tmp & SCKE) != SCKE);
-#endif  /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */
+                i = 0;
+                r8a66597_bset(r8a66597, XCKE, SYSCFG0);
+                do {
+                        msleep(1);
+                        tmp = r8a66597_read(r8a66597, SYSCFG0);
+                        if (i++ > 500) {
+                                printk(KERN_ERR "r8a66597: reg access fail.\n");
+                                return -ENXIO;
+                        }
+                } while ((tmp & SCKE) != SCKE);
+        }
 
         return 0;
 }
@@ -136,15 +136,16 @@ static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
 {
         r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
         udelay(1);
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
-#if defined(CONFIG_HAVE_CLK)
-        clk_disable(r8a66597->clk);
-#endif
-#else
-        r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
-        r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
-        r8a66597_bclr(r8a66597, USBE, SYSCFG0);
+
+        if (r8a66597->pdata->on_chip) {
+#ifdef CONFIG_HAVE_CLK
+                clk_disable(r8a66597->clk);
 #endif
+        } else {
+                r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
+                r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
+                r8a66597_bclr(r8a66597, USBE, SYSCFG0);
+        }
 }
 
 static void r8a66597_enable_port(struct r8a66597 *r8a66597, int port)
@@ -205,7 +206,7 @@ static int enable_controller(struct r8a66597 *r8a66597)
 
         r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1);
 
-        for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
+        for (port = 0; port < r8a66597->max_root_hub; port++)
                 r8a66597_enable_port(r8a66597, port);
 
         return 0;
@@ -218,7 +219,7 @@ static void disable_controller(struct r8a66597 *r8a66597)
         r8a66597_write(r8a66597, 0, INTENB0);
         r8a66597_write(r8a66597, 0, INTSTS0);
 
-        for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
+        for (port = 0; port < r8a66597->max_root_hub; port++)
                 r8a66597_disable_port(r8a66597, port);
 
         r8a66597_clock_disable(r8a66597);
@@ -249,11 +250,12 @@ static int is_hub_limit(char *devpath)
         return ((strlen(devpath) >= 4) ? 1 : 0);
 }
 
-static void get_port_number(char *devpath, u16 *root_port, u16 *hub_port)
+static void get_port_number(struct r8a66597 *r8a66597,
+                            char *devpath, u16 *root_port, u16 *hub_port)
 {
         if (root_port) {
                 *root_port = (devpath[0] & 0x0F) - 1;
-                if (*root_port >= R8A66597_MAX_ROOT_HUB)
+                if (*root_port >= r8a66597->max_root_hub)
                         printk(KERN_ERR "r8a66597: Illegal root port number.\n");
         }
         if (hub_port)
@@ -355,7 +357,8 @@ static int make_r8a66597_device(struct r8a66597 *r8a66597,
         INIT_LIST_HEAD(&dev->device_list);
         list_add_tail(&dev->device_list, &r8a66597->child_device);
 
-        get_port_number(urb->dev->devpath, &dev->root_port, &dev->hub_port);
+        get_port_number(r8a66597, urb->dev->devpath,
+                        &dev->root_port, &dev->hub_port);
         if (!is_child_device(urb->dev->devpath))
                 r8a66597->root_hub[dev->root_port].dev = dev;
 
@@ -420,7 +423,7 @@ static void free_usb_address(struct r8a66597 *r8a66597,
         list_del(&dev->device_list);
         kfree(dev);
 
-        for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
+        for (port = 0; port < r8a66597->max_root_hub; port++) {
                 if (r8a66597->root_hub[port].dev == dev) {
                         r8a66597->root_hub[port].dev = NULL;
                         break;
@@ -495,10 +498,20 @@ static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597,
                 r8a66597_bset(r8a66597, SQCLR, pipe->pipectr);
 }
 
+static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
+{
+        if (r8a66597->pdata->on_chip)
+                return MBW_32;
+        else
+                return MBW_16;
+}
+
 /* this function must be called with interrupt disabled */
 static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
 {
-        r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL);
+        unsigned short mbw = mbw_value(r8a66597);
+
+        r8a66597_mdfy(r8a66597, mbw | pipenum, mbw | CURPIPE, CFIFOSEL);
         r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);
 }
 
@@ -506,11 +519,13 @@ static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
 static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597,
                                          struct r8a66597_pipe *pipe)
 {
+        unsigned short mbw = mbw_value(r8a66597);
+
         cfifo_change(r8a66597, 0);
-        r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D0FIFOSEL);
-        r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D1FIFOSEL);
+        r8a66597_mdfy(r8a66597, mbw | 0, mbw | CURPIPE, D0FIFOSEL);
+        r8a66597_mdfy(r8a66597, mbw | 0, mbw | CURPIPE, D1FIFOSEL);
 
-        r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, MBW | CURPIPE,
+        r8a66597_mdfy(r8a66597, mbw | pipe->info.pipenum, mbw | CURPIPE,
                       pipe->fifosel);
         r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum);
 }
@@ -742,9 +757,13 @@ static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
                                      struct r8a66597_pipe *pipe,
                                      struct urb *urb)
 {
-#if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
         int i;
         struct r8a66597_pipe_info *info = &pipe->info;
+        unsigned short mbw = mbw_value(r8a66597);
+
+        /* pipe dma is only for external controlles */
+        if (r8a66597->pdata->on_chip)
+                return;
 
         if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) {
                 for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) {
@@ -763,8 +782,8 @@ static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
                         set_pipe_reg_addr(pipe, i);
 
                         cfifo_change(r8a66597, 0);
-                        r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum,
-                                      MBW | CURPIPE, pipe->fifosel);
+                        r8a66597_mdfy(r8a66597, mbw | pipe->info.pipenum,
+                                      mbw | CURPIPE, pipe->fifosel);
 
                         r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE,
                                           pipe->info.pipenum);
@@ -772,7 +791,6 @@ static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
                         break;
                 }
         }
-#endif  /* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */
 }
 
 /* this function must be called with interrupt disabled */
@@ -1769,7 +1787,7 @@ static void r8a66597_timer(unsigned long _r8a66597)
 
         spin_lock_irqsave(&r8a66597->lock, flags);
 
-        for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
+        for (port = 0; port < r8a66597->max_root_hub; port++)
                 r8a66597_root_hub_control(r8a66597, port);
 
         spin_unlock_irqrestore(&r8a66597->lock, flags);
@@ -1807,7 +1825,7 @@ static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb)
         u16 root_port, hub_port;
 
         if (usb_address == 0) {
-                get_port_number(urb->dev->devpath,
+                get_port_number(r8a66597, urb->dev->devpath,
                                 &root_port, &hub_port);
                 set_devadd_reg(r8a66597, 0,
                                get_r8a66597_usb_speed(urb->dev->speed),
@@ -2082,7 +2100,7 @@ static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)
 
         *buf = 0;       /* initialize (no change) */
 
-        for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++) {
+        for (i = 0; i < r8a66597->max_root_hub; i++) {
                 if (r8a66597->root_hub[i].port & 0xffff0000)
                         *buf |= 1 << (i + 1);
         }
@@ -2097,11 +2115,11 @@ static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
 {
         desc->bDescriptorType = 0x29;
         desc->bHubContrCurrent = 0;
-        desc->bNbrPorts = R8A66597_MAX_ROOT_HUB;
+        desc->bNbrPorts = r8a66597->max_root_hub;
         desc->bDescLength = 9;
         desc->bPwrOn2PwrGood = 0;
         desc->wHubCharacteristics = cpu_to_le16(0x0011);
-        desc->bitmap[0] = ((1 << R8A66597_MAX_ROOT_HUB) - 1) << 1;
+        desc->bitmap[0] = ((1 << r8a66597->max_root_hub) - 1) << 1;
         desc->bitmap[1] = ~0;
 }
 
@@ -2129,7 +2147,7 @@ static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
                 }
                 break;
         case ClearPortFeature:
-                if (wIndex > R8A66597_MAX_ROOT_HUB)
+                if (wIndex > r8a66597->max_root_hub)
                         goto error;
                 if (wLength != 0)
                         goto error;
@@ -2162,12 +2180,12 @@ static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
                 *buf = 0x00;
                 break;
         case GetPortStatus:
-                if (wIndex > R8A66597_MAX_ROOT_HUB)
+                if (wIndex > r8a66597->max_root_hub)
                         goto error;
                 *(__le32 *)buf = cpu_to_le32(rh->port);
                 break;
         case SetPortFeature:
-                if (wIndex > R8A66597_MAX_ROOT_HUB)
+                if (wIndex > r8a66597->max_root_hub)
                         goto error;
                 if (wLength != 0)
                         goto error;
@@ -2216,7 +2234,7 @@ static int r8a66597_bus_suspend(struct usb_hcd *hcd)
 
         dbg("%s", __func__);
 
-        for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
+        for (port = 0; port < r8a66597->max_root_hub; port++) {
                 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
                 unsigned long dvstctr_reg = get_dvstctr_reg(port);
 
@@ -2247,7 +2265,7 @@ static int r8a66597_bus_resume(struct usb_hcd *hcd)
 
         dbg("%s", __func__);
 
-        for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
+        for (port = 0; port < r8a66597->max_root_hub; port++) {
                 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
                 unsigned long dvstctr_reg = get_dvstctr_reg(port);
 
@@ -2314,7 +2332,7 @@ static int r8a66597_suspend(struct device *dev)
 
         disable_controller(r8a66597);
 
-        for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
+        for (port = 0; port < r8a66597->max_root_hub; port++) {
                 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
 
                 rh->port = 0x00000000;
@@ -2354,8 +2372,9 @@ static int __init_or_module r8a66597_remove(struct platform_device *pdev)
         del_timer_sync(&r8a66597->rh_timer);
         usb_remove_hcd(hcd);
         iounmap((void *)r8a66597->reg);
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
-        clk_put(r8a66597->clk);
+#ifdef CONFIG_HAVE_CLK
+        if (r8a66597->pdata->on_chip)
+                clk_put(r8a66597->clk);
 #endif
         usb_put_hcd(hcd);
         return 0;
@@ -2363,7 +2382,7 @@ static int __init_or_module r8a66597_remove(struct platform_device *pdev)
 
 static int __devinit r8a66597_probe(struct platform_device *pdev)
 {
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+#ifdef CONFIG_HAVE_CLK
         char clk_name[8];
 #endif
         struct resource *res = NULL, *ires;
@@ -2425,15 +2444,20 @@ static int __devinit r8a66597_probe(struct platform_device *pdev)
         r8a66597->pdata = pdev->dev.platform_data;
         r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
 
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
-        snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
-        r8a66597->clk = clk_get(&pdev->dev, clk_name);
-        if (IS_ERR(r8a66597->clk)) {
-                dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
-                ret = PTR_ERR(r8a66597->clk);
-                goto clean_up2;
-        }
+        if (r8a66597->pdata->on_chip) {
+#ifdef CONFIG_HAVE_CLK
+                snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
+                r8a66597->clk = clk_get(&pdev->dev, clk_name);
+                if (IS_ERR(r8a66597->clk)) {
+                        dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
+                                clk_name);
+                        ret = PTR_ERR(r8a66597->clk);
+                        goto clean_up2;
+                }
 #endif
+                r8a66597->max_root_hub = 1;
+        } else
+                r8a66597->max_root_hub = 2;
 
         spin_lock_init(&r8a66597->lock);
         init_timer(&r8a66597->rh_timer);
@@ -2463,8 +2487,9 @@ static int __devinit r8a66597_probe(struct platform_device *pdev)
         return 0;
 
 clean_up3:
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
-        clk_put(r8a66597->clk);
+#ifdef CONFIG_HAVE_CLK
+        if (r8a66597->pdata->on_chip)
+                clk_put(r8a66597->clk);
 clean_up2:
 #endif
         usb_put_hcd(hcd);
diff --git a/drivers/usb/host/r8a66597.h b/drivers/usb/host/r8a66597.h
index d72680b433f9..eecbd917bc81 100644
--- a/drivers/usb/host/r8a66597.h
+++ b/drivers/usb/host/r8a66597.h
@@ -26,7 +26,7 @@
 #ifndef __R8A66597_H__
 #define __R8A66597_H__
 
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+#ifdef CONFIG_HAVE_CLK
 #include <linux/clk.h>
 #endif
 
@@ -193,13 +193,9 @@
 #define REW             0x4000  /* b14: Buffer rewind */
 #define DCLRM           0x2000  /* b13: DMA buffer clear mode */
 #define DREQE           0x1000  /* b12: DREQ output enable */
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
-#define MBW             0x0800
-#else
-#define MBW             0x0400  /* b10: Maximum bit width for FIFO access */
-#endif
 #define   MBW_8          0x0000   /*  8bit */
 #define   MBW_16         0x0400   /* 16bit */
+#define   MBW_32         0x0800   /* 32bit */
 #define BIGEND          0x0100  /* b8: Big endian mode */
 #define   BYTE_LITTLE    0x0000         /* little dendian */
 #define   BYTE_BIG       0x0100         /* big endifan */
@@ -405,11 +401,7 @@
 #define R8A66597_MAX_NUM_PIPE           10
 #define R8A66597_BUF_BSIZE              8
 #define R8A66597_MAX_DEVICE             10
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
-#define R8A66597_MAX_ROOT_HUB           1
-#else
 #define R8A66597_MAX_ROOT_HUB           2
-#endif
 #define R8A66597_MAX_SAMPLING           5
 #define R8A66597_RH_POLL_TIME           10
 #define R8A66597_MAX_DMA_CHANNEL        2
@@ -487,7 +479,7 @@ struct r8a66597_root_hub {
 struct r8a66597 {
         spinlock_t lock;
         unsigned long reg;
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
+#ifdef CONFIG_HAVE_CLK
         struct clk *clk;
 #endif
         struct r8a66597_platdata        *pdata;
@@ -504,6 +496,7 @@ struct r8a66597 {
         unsigned short interval_map;
         unsigned char pipe_cnt[R8A66597_MAX_NUM_PIPE];
         unsigned char dma_map;
+        unsigned int max_root_hub;
 
         struct list_head child_device;
         unsigned long child_connect_map[4];
@@ -550,21 +543,22 @@ static inline void r8a66597_read_fifo(struct r8a66597 *r8a66597,
                                       unsigned long offset, u16 *buf,
                                       int len)
 {
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
         unsigned long fifoaddr = r8a66597->reg + offset;
         unsigned long count;
 
-        count = len / 4;
-        insl(fifoaddr, buf, count);
+        if (r8a66597->pdata->on_chip) {
+                count = len / 4;
+                insl(fifoaddr, buf, count);
 
-        if (len & 0x00000003) {
-                unsigned long tmp = inl(fifoaddr);
-                memcpy((unsigned char *)buf + count * 4, &tmp, len & 0x03);
+                if (len & 0x00000003) {
+                        unsigned long tmp = inl(fifoaddr);
+                        memcpy((unsigned char *)buf + count * 4, &tmp,
+                               len & 0x03);
+                }
+        } else {
+                len = (len + 1) / 2;
+                insw(fifoaddr, buf, len);
         }
-#else
-        len = (len + 1) / 2;
-        insw(r8a66597->reg + offset, buf, len);
-#endif
 }
 
 static inline void r8a66597_write(struct r8a66597 *r8a66597, u16 val,
@@ -578,33 +572,33 @@ static inline void r8a66597_write_fifo(struct r8a66597 *r8a66597,
                                        int len)
 {
         unsigned long fifoaddr = r8a66597->reg + offset;
-#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
         unsigned long count;
         unsigned char *pb;
         int i;
 
-        count = len / 4;
-        outsl(fifoaddr, buf, count);
+        if (r8a66597->pdata->on_chip) {
+                count = len / 4;
+                outsl(fifoaddr, buf, count);
+
+                if (len & 0x00000003) {
+                        pb = (unsigned char *)buf + count * 4;
+                        for (i = 0; i < (len & 0x00000003); i++) {
+                                if (r8a66597_read(r8a66597, CFIFOSEL) & BIGEND)
+                                        outb(pb[i], fifoaddr + i);
+                                else
+                                        outb(pb[i], fifoaddr + 3 - i);
+                        }
+                }
+        } else {
+                int odd = len & 0x0001;
 
-        if (len & 0x00000003) {
-                pb = (unsigned char *)buf + count * 4;
-                for (i = 0; i < (len & 0x00000003); i++) {
-                        if (r8a66597_read(r8a66597, CFIFOSEL) & BIGEND)
-                                outb(pb[i], fifoaddr + i);
-                        else
-                                outb(pb[i], fifoaddr + 3 - i);
+                len = len / 2;
+                outsw(fifoaddr, buf, len);
+                if (unlikely(odd)) {
+                        buf = &buf[len];
+                        outb((unsigned char)*buf, fifoaddr);
                 }
         }
-#else
-        int odd = len & 0x0001;
-
-        len = len / 2;
-        outsw(fifoaddr, buf, len);
-        if (unlikely(odd)) {
-                buf = &buf[len];
-                outb((unsigned char)*buf, fifoaddr);
-        }
-#endif
 }
 
 static inline void r8a66597_mdfy(struct r8a66597 *r8a66597,