usb: renesas_usbhs: add usbhsf_fifo

renesas_usbhs has CFIFO/D0FIFO/D1FIFO.
But current renesas_usbhs is using CFIFO (for PIO) only for now.
The fifo selection method is needed for DMAEngine support.
This is a preparation for DMAEngine support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 77 insertions, 24 deletions

diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index f3664d6af661..e510b29216b3 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -323,10 +323,14 @@ static int __devinit usbhs_probe(struct platform_device *pdev)
         if (ret < 0)
                 goto probe_end_iounmap;
 
-        ret = usbhs_mod_probe(priv);
+        ret = usbhs_fifo_probe(priv);
         if (ret < 0)
                 goto probe_end_pipe_exit;
 
+        ret = usbhs_mod_probe(priv);
+        if (ret < 0)
+                goto probe_end_fifo_exit;
+
         /* dev_set_drvdata should be called after usbhs_mod_init */
         dev_set_drvdata(&pdev->dev, priv);
 
@@ -374,6 +378,8 @@ probe_end_call_remove:
         usbhs_platform_call(priv, hardware_exit, pdev);
 probe_end_mod_exit:
         usbhs_mod_remove(priv);
+probe_end_fifo_exit:
+        usbhs_fifo_remove(priv);
 probe_end_pipe_exit:
         usbhs_pipe_remove(priv);
 probe_end_iounmap:
@@ -404,6 +410,7 @@ static int __devexit usbhs_remove(struct platform_device *pdev)
 
         usbhs_platform_call(priv, hardware_exit, pdev);
         usbhs_mod_remove(priv);
+        usbhs_fifo_remove(priv);
         usbhs_pipe_remove(priv);
         iounmap(priv->base);
         kfree(priv);
diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h
index 7bf675c23a5e..06d7239a044d 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -194,6 +194,11 @@ struct usbhs_priv {
          * pipe control
          */
         struct usbhs_pipe_info pipe_info;
+
+        /*
+         * fifo control
+         */
+        struct usbhs_fifo_info fifo_info;
 };
 
 /*
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 3cda71e5a35a..53e2b35dd325 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -19,6 +19,8 @@
 #include "./common.h"
 #include "./pipe.h"
 
+#define usbhsf_get_cfifo(p)     (&((p)->fifo_info.cfifo))
+
 /*
  *              packet info function
  */
@@ -194,20 +196,22 @@ static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
 /*
  *              FIFO ctrl
  */
-static void usbhsf_send_terminator(struct usbhs_pipe *pipe)
+static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
+                                   struct usbhs_fifo *fifo)
 {
         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 
-        usbhs_bset(priv, CFIFOCTR, BVAL, BVAL);
+        usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
 }
 
-static int usbhsf_fifo_barrier(struct usbhs_priv *priv)
+static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
+                               struct usbhs_fifo *fifo)
 {
         int timeout = 1024;
 
         do {
                 /* The FIFO port is accessible */
-                if (usbhs_read(priv, CFIFOCTR) & FRDY)
+                if (usbhs_read(priv, fifo->ctr) & FRDY)
                         return 0;
 
                 udelay(10);
@@ -216,22 +220,26 @@ static int usbhsf_fifo_barrier(struct usbhs_priv *priv)
         return -EBUSY;
 }
 
-static void usbhsf_fifo_clear(struct usbhs_pipe *pipe)
+static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
+                              struct usbhs_fifo *fifo)
 {
         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 
         if (!usbhs_pipe_is_dcp(pipe))
-                usbhsf_fifo_barrier(priv);
+                usbhsf_fifo_barrier(priv, fifo);
 
-        usbhs_write(priv, CFIFOCTR, BCLR);
+        usbhs_write(priv, fifo->ctr, BCLR);
 }
 
-static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv)
+static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
+                               struct usbhs_fifo *fifo)
 {
-        return usbhs_read(priv, CFIFOCTR) & DTLN_MASK;
+        return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
 }
 
-static int usbhsf_fifo_select(struct usbhs_pipe *pipe, int write)
+static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
+                              struct usbhs_fifo *fifo,
+                              int write)
 {
         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
         struct device *dev = usbhs_priv_to_dev(priv);
@@ -243,11 +251,11 @@ static int usbhsf_fifo_select(struct usbhs_pipe *pipe, int write)
                 base |= (1 == write) << 5;      /* ISEL */
 
         /* "base" will be used below  */
-        usbhs_write(priv, CFIFOSEL, base | MBW_32);
+        usbhs_write(priv, fifo->sel, base | MBW_32);
 
         /* check ISEL and CURPIPE value */
         while (timeout--) {
-                if (base == (mask & usbhs_read(priv, CFIFOSEL)))
+                if (base == (mask & usbhs_read(priv, fifo->sel)))
                         return 0;
                 udelay(10);
         }
@@ -265,14 +273,15 @@ static int usbhsf_try_push(struct usbhs_pkt *pkt, int *is_done)
         struct usbhs_pipe *pipe = pkt->pipe;
         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
         struct device *dev = usbhs_priv_to_dev(priv);
-        void __iomem *addr = priv->base + CFIFO;
+        struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
+        void __iomem *addr = priv->base + fifo->port;
         u8 *buf;
         int maxp = usbhs_pipe_get_maxpacket(pipe);
         int total_len;
         int i, ret, len;
         int is_short;
 
-        ret = usbhsf_fifo_select(pipe, 1);
+        ret = usbhsf_fifo_select(pipe, fifo, 1);
         if (ret < 0)
                 goto usbhs_fifo_write_busy;
 
@@ -280,7 +289,7 @@ static int usbhsf_try_push(struct usbhs_pkt *pkt, int *is_done)
         if (ret < 0)
                 goto usbhs_fifo_write_busy;
 
-        ret = usbhsf_fifo_barrier(priv);
+        ret = usbhsf_fifo_barrier(priv, fifo);
         if (ret < 0)
                 goto usbhs_fifo_write_busy;
 
@@ -321,7 +330,7 @@ static int usbhsf_try_push(struct usbhs_pkt *pkt, int *is_done)
          * pipe/irq handling
          */
         if (is_short)
-                usbhsf_send_terminator(pipe);
+                usbhsf_send_terminator(pipe, fifo);
 
         usbhsf_tx_irq_ctrl(pipe, !*is_done);
         usbhs_pipe_enable(pipe);
@@ -358,19 +367,21 @@ struct usbhs_pkt_handle usbhs_fifo_push_handler = {
 static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
 {
         struct usbhs_pipe *pipe = pkt->pipe;
+        struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
+        struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
         int ret;
 
         /*
          * select pipe and enable it to prepare packet receive
          */
-        ret = usbhsf_fifo_select(pipe, 0);
+        ret = usbhsf_fifo_select(pipe, fifo, 0);
         if (ret < 0)
                 return ret;
 
         usbhs_pipe_enable(pipe);
         usbhsf_rx_irq_ctrl(pipe, 1);
 
-        return ret;
+        return 0;
 }
 
 static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done)
@@ -378,7 +389,8 @@ static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done)
         struct usbhs_pipe *pipe = pkt->pipe;
         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
         struct device *dev = usbhs_priv_to_dev(priv);
-        void __iomem *addr = priv->base + CFIFO;
+        struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
+        void __iomem *addr = priv->base + fifo->port;
         u8 *buf;
         u32 data = 0;
         int maxp = usbhs_pipe_get_maxpacket(pipe);
@@ -386,15 +398,15 @@ static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done)
         int i, ret;
         int total_len = 0;
 
-        ret = usbhsf_fifo_select(pipe, 0);
+        ret = usbhsf_fifo_select(pipe, fifo, 0);
         if (ret < 0)
                 return ret;
 
-        ret = usbhsf_fifo_barrier(priv);
+        ret = usbhsf_fifo_barrier(priv, fifo);
         if (ret < 0)
                 return ret;
 
-        rcv_len = usbhsf_fifo_rcv_len(priv);
+        rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
 
         buf             = pkt->buf    + pkt->actual;
         len             = pkt->length - pkt->actual;
@@ -408,7 +420,7 @@ static int usbhsf_try_pop(struct usbhs_pkt *pkt, int *is_done)
          * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
          */
         if (0 == rcv_len) {
-                usbhsf_fifo_clear(pipe);
+                usbhsf_fifo_clear(pipe, fifo);
                 goto usbhs_fifo_read_end;
         }
 
@@ -555,3 +567,20 @@ void usbhs_fifo_quit(struct usbhs_priv *priv)
         mod->irq_bempsts        = 0;
         mod->irq_brdysts        = 0;
 }
+
+int usbhs_fifo_probe(struct usbhs_priv *priv)
+{
+        struct usbhs_fifo *fifo;
+
+        /* CFIFO */
+        fifo = usbhsf_get_cfifo(priv);
+        fifo->port      = CFIFO;
+        fifo->sel       = CFIFOSEL;
+        fifo->ctr       = CFIFOCTR;
+
+        return 0;
+}
+
+void usbhs_fifo_remove(struct usbhs_priv *priv)
+{
+}
diff --git a/drivers/usb/renesas_usbhs/fifo.h b/drivers/usb/renesas_usbhs/fifo.h
index fcb1ecef57da..04d000ae7bdc 100644
--- a/drivers/usb/renesas_usbhs/fifo.h
+++ b/drivers/usb/renesas_usbhs/fifo.h
@@ -19,6 +19,16 @@
 
 #include "pipe.h"
 
+struct usbhs_fifo {
+        u32 port;       /* xFIFO */
+        u32 sel;        /* xFIFOSEL */
+        u32 ctr;        /* xFIFOCTR */
+};
+
+struct usbhs_fifo_info {
+        struct usbhs_fifo cfifo;
+};
+
 struct usbhs_pkt_handle;
 struct usbhs_pkt {
         struct list_head node;
@@ -38,6 +48,8 @@ struct usbhs_pkt_handle {
 /*
  * fifo
  */
+int usbhs_fifo_probe(struct usbhs_priv *priv);
+void usbhs_fifo_remove(struct usbhs_priv *priv);
 void usbhs_fifo_init(struct usbhs_priv *priv);
 void usbhs_fifo_quit(struct usbhs_priv *priv);