[PATCH] powerpc/5200: make BestComm gen_bd microcode exchangeable

[Albrecht Dreß]

This patch adds a method for defining different microcodes than the pe-defined ones for the MPC52xx processor's BestComm General Buffer Descriptor (gen_db) tasks. The default microcode is still the one from bcom_gen_bd_[rt]x_task, but it can be replaced by calling bcom_gen_bd_set_microcode() which is more efficient than explicitly loading it via bcom_load_image() after each bcom_gen_bd_[rt]x_reset().

Signed-off-by: Albrecht Dreß <albrecht.dr...@arcor.de>


---



@@ -78,6 +78,7 @@ struct bcom_gen_bd_priv {
        int             initiator;
        int             ipr;
        int             maxbufsize;
+       u32    *microcode;
 };


@@ -104,6 +105,7 @@ bcom_gen_bd_rx_init(int queue_len, phys_
        priv->initiator      = initiator;
        priv->ipr    = ipr;
        priv->maxbufsize = maxbufsize;
+       priv->microcode = bcom_gen_bd_rx_task;

        if (bcom_gen_bd_rx_reset(tsk)) {
                bcom_task_free(tsk);
@@ -128,7 +130,7 @@ bcom_gen_bd_rx_reset(struct bcom_task *t
        var = (struct bcom_gen_bd_rx_var *) bcom_task_var(tsk->tasknum);
        inc = (struct bcom_gen_bd_rx_inc *) bcom_task_inc(tsk->tasknum);

-       if (bcom_load_image(tsk->tasknum, bcom_gen_bd_rx_task))
+       if (bcom_load_image(tsk->tasknum, priv->microcode))
                return -1;

        var->enable  = bcom_eng->regs_base +
@@ -188,6 +190,7 @@ bcom_gen_bd_tx_init(int queue_len, phys_
        priv->fifo   = fifo;
        priv->initiator      = initiator;
        priv->ipr    = ipr;
+       priv->microcode = bcom_gen_bd_tx_task;

        if (bcom_gen_bd_tx_reset(tsk)) {
                bcom_task_free(tsk);
@@ -212,7 +215,7 @@ bcom_gen_bd_tx_reset(struct bcom_task *t
        var = (struct bcom_gen_bd_tx_var *) bcom_task_var(tsk->tasknum);
        inc = (struct bcom_gen_bd_tx_inc *) bcom_task_inc(tsk->tasknum);

-       if (bcom_load_image(tsk->tasknum, bcom_gen_bd_tx_task))
+       if (bcom_load_image(tsk->tasknum, priv->microcode))
                return -1;

        var->enable  = bcom_eng->regs_base +
@@ -253,6 +256,16 @@ bcom_gen_bd_tx_release(struct bcom_task
 }
 EXPORT_SYMBOL_GPL(bcom_gen_bd_tx_release);

+void
+bcom_gen_bd_set_microcode(struct bcom_task *tsk, u32 *microcode)
+{
+       struct bcom_gen_bd_priv *priv = tsk->priv;
+
+       priv->microcode = microcode;
+}
+EXPORT_SYMBOL_GPL(bcom_gen_bd_set_microcode);
+
+

  * PSC support code
  */

@@ -43,6 +43,9 @@ bcom_gen_bd_tx_reset(struct bcom_task *t
 extern void
 bcom_gen_bd_tx_release(struct bcom_task *tsk);

+extern void
+bcom_gen_bd_set_microcode(struct bcom_task *tsk, u32 *microcode);
+

 /* PSC support utility wrappers */

diff -uprN -X linux-2.6.30.3/Documentation/dontdiff linux-2.6.30.3.orig/arch/powerpc/sysdev/bestcomm/gen_bd.c linux-2.6.30.3/arch/powerpc/sysdev/bestcomm/gen_bd.c --- linux-2.6.30.3.orig/arch/powerpc/sysdev/bestcomm/gen_bd.c 2009-07-24 23:47:51.000000000 +0200 +++ linux-2.6.30.3/arch/powerpc/sysdev/bestcomm/gen_bd.c 2009-10-01 14:26:33.000000000 +0200 /* --------------------------------------------------------------------- diff -uprN -X linux-2.6.30.3/Documentation/dontdiff linux-2.6.30.3.orig/arch/powerpc/sysdev/bestcomm/gen_bd.h linux-2.6.30.3/arch/powerpc/sysdev/bestcomm/gen_bd.h --- linux-2.6.30.3.orig/arch/powerpc/sysdev/bestcomm/gen_bd.h 2009-07-24 23:47:51.000000000 +0200 +++ linux-2.6.30.3/arch/powerpc/sysdev/bestcomm/gen_bd.h 2009-10-01 14:26:50.000000000 +0200 struct bcom_task * bcom_psc_gen_bd_rx_init(unsigned psc_num, int queue_len,

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