powerpc/QE: switch to the cpm_muram implementation

This is very trivial patch. We're transitioning to the cpm_muram_*
calls. That's it.

Less trivial changes:
- BD_SC_* defines were defined in the cpm.h and qe.h, so to avoid redefines
  we remove BD_SC from the qe.h and use cpm.h along with cpm_muram_*
  prototypes;
- qe_muram_dump was unused and thus removed;
- added some code to the cpm_common.c to support legacy QE bindings
  (data-only node name).
- For convenience, define qe_* calls to cpm_*. So drivers need not to be
  changed.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

5 files changed, 23 insertions, 123 deletions

diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 2bfbb39380e9..16a0ed28eb00 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -42,6 +42,7 @@ endif
 ifeq ($(ARCH),powerpc)
 obj-$(CONFIG_CPM)               += cpm_common.o
 obj-$(CONFIG_CPM2)              += cpm2.o cpm2_pic.o
+obj-$(CONFIG_QUICC_ENGINE)      += cpm_common.o
 obj-$(CONFIG_PPC_DCR)           += dcr.o
 obj-$(CONFIG_8xx)               += mpc8xx_pic.o cpm1.o
 obj-$(CONFIG_UCODE_PATCH)       += micropatch.o
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index cb7df2dce44f..9b75d164bdf9 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -85,9 +85,13 @@ int __init cpm_muram_init(void)
 
         np = of_find_compatible_node(NULL, NULL, "fsl,cpm-muram-data");
         if (!np) {
-                printk(KERN_ERR "Cannot find CPM muram data node");
-                ret = -ENODEV;
-                goto out;
+                /* try legacy bindings */
+                np = of_find_node_by_name(NULL, "data-only");
+                if (!np) {
+                        printk(KERN_ERR "Cannot find CPM muram data node");
+                        ret = -ENODEV;
+                        goto out;
+                }
         }
 
         muram_pbase = of_translate_address(np, zero);
@@ -189,6 +193,12 @@ void __iomem *cpm_muram_addr(unsigned long offset)
 }
 EXPORT_SYMBOL(cpm_muram_addr);
 
+unsigned long cpm_muram_offset(void __iomem *addr)
+{
+        return addr - (void __iomem *)muram_vbase;
+}
+EXPORT_SYMBOL(cpm_muram_offset);
+
 /**
  * cpm_muram_dma - turn a muram virtual address into a DMA address
  * @offset: virtual address from cpm_muram_addr() to convert
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index cff550eec7e8..28e05df952de 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -35,7 +35,6 @@
 #include <asm/rheap.h>
 
 static void qe_snums_init(void);
-static void qe_muram_init(void);
 static int qe_sdma_init(void);
 
 static DEFINE_SPINLOCK(qe_lock);
@@ -325,97 +324,6 @@ static int qe_sdma_init(void)
         return 0;
 }
 
-/*
- * muram_alloc / muram_free bits.
- */
-static DEFINE_SPINLOCK(qe_muram_lock);
-
-/* 16 blocks should be enough to satisfy all requests
- * until the memory subsystem goes up... */
-static rh_block_t qe_boot_muram_rh_block[16];
-static rh_info_t qe_muram_info;
-
-static void qe_muram_init(void)
-{
-        struct device_node *np;
-        const u32 *address;
-        u64 size;
-        unsigned int flags;
-
-        /* initialize the info header */
-        rh_init(&qe_muram_info, 1,
-                sizeof(qe_boot_muram_rh_block) /
-                sizeof(qe_boot_muram_rh_block[0]), qe_boot_muram_rh_block);
-
-        /* Attach the usable muram area */
-        /* XXX: This is a subset of the available muram. It
-         * varies with the processor and the microcode patches activated.
-         */
-        np = of_find_compatible_node(NULL, NULL, "fsl,qe-muram-data");
-        if (!np) {
-                np = of_find_node_by_name(NULL, "data-only");
-                if (!np) {
-                        WARN_ON(1);
-                        return;
-                }
-        }
-
-        address = of_get_address(np, 0, &size, &flags);
-        WARN_ON(!address);
-
-        of_node_put(np);
-        if (address)
-                rh_attach_region(&qe_muram_info, *address, (int)size);
-}
-
-/* This function returns an index into the MURAM area.
- */
-unsigned long qe_muram_alloc(int size, int align)
-{
-        unsigned long start;
-        unsigned long flags;
-
-        spin_lock_irqsave(&qe_muram_lock, flags);
-        start = rh_alloc_align(&qe_muram_info, size, align, "QE");
-        spin_unlock_irqrestore(&qe_muram_lock, flags);
-
-        return start;
-}
-EXPORT_SYMBOL(qe_muram_alloc);
-
-int qe_muram_free(unsigned long offset)
-{
-        int ret;
-        unsigned long flags;
-
-        spin_lock_irqsave(&qe_muram_lock, flags);
-        ret = rh_free(&qe_muram_info, offset);
-        spin_unlock_irqrestore(&qe_muram_lock, flags);
-
-        return ret;
-}
-EXPORT_SYMBOL(qe_muram_free);
-
-/* not sure if this is ever needed */
-unsigned long qe_muram_alloc_fixed(unsigned long offset, int size)
-{
-        unsigned long start;
-        unsigned long flags;
-
-        spin_lock_irqsave(&qe_muram_lock, flags);
-        start = rh_alloc_fixed(&qe_muram_info, offset, size, "commproc");
-        spin_unlock_irqrestore(&qe_muram_lock, flags);
-
-        return start;
-}
-EXPORT_SYMBOL(qe_muram_alloc_fixed);
-
-void qe_muram_dump(void)
-{
-        rh_dump(&qe_muram_info);
-}
-EXPORT_SYMBOL(qe_muram_dump);
-
 /* The maximum number of RISCs we support */
 #define MAX_QE_RISC     2
 
diff --git a/include/asm-powerpc/cpm.h b/include/asm-powerpc/cpm.h
index ede38ffe466a..63a55337c2de 100644
--- a/include/asm-powerpc/cpm.h
+++ b/include/asm-powerpc/cpm.h
@@ -96,6 +96,7 @@ unsigned long cpm_muram_alloc(unsigned long size, unsigned long align);
 int cpm_muram_free(unsigned long offset);
 unsigned long cpm_muram_alloc_fixed(unsigned long offset, unsigned long size);
 void __iomem *cpm_muram_addr(unsigned long offset);
+unsigned long cpm_muram_offset(void __iomem *addr);
 dma_addr_t cpm_muram_dma(void __iomem *addr);
 int cpm_command(u32 command, u8 opcode);
 
diff --git a/include/asm-powerpc/qe.h b/include/asm-powerpc/qe.h
index 01e3c70b93ab..80807fd6a706 100644
--- a/include/asm-powerpc/qe.h
+++ b/include/asm-powerpc/qe.h
@@ -17,6 +17,7 @@
 #ifdef __KERNEL__
 
 #include <linux/spinlock.h>
+#include <asm/cpm.h>
 #include <asm/immap_qe.h>
 
 #define QE_NUM_OF_SNUM  28
@@ -119,20 +120,13 @@ unsigned int qe_get_brg_clk(void);
 int qe_setbrg(enum qe_clock brg, unsigned int rate, unsigned int multiplier);
 int qe_get_snum(void);
 void qe_put_snum(u8 snum);
-unsigned long qe_muram_alloc(int size, int align);
-int qe_muram_free(unsigned long offset);
-unsigned long qe_muram_alloc_fixed(unsigned long offset, int size);
-void qe_muram_dump(void);
-
-static inline void __iomem *qe_muram_addr(unsigned long offset)
-{
-        return (void __iomem *)&qe_immr->muram[offset];
-}
-
-static inline unsigned long qe_muram_offset(void __iomem *addr)
-{
-        return addr - (void __iomem *)qe_immr->muram;
-}
+/* we actually use cpm_muram implementation, define this for convenience */
+#define qe_muram_init cpm_muram_init
+#define qe_muram_alloc cpm_muram_alloc
+#define qe_muram_alloc_fixed cpm_muram_alloc_fixed
+#define qe_muram_free cpm_muram_free
+#define qe_muram_addr cpm_muram_addr
+#define qe_muram_offset cpm_muram_offset
 
 /* Structure that defines QE firmware binary files.
  *
@@ -199,20 +193,6 @@ struct qe_bd {
 #define BD_STATUS_MASK  0xffff0000
 #define BD_LENGTH_MASK  0x0000ffff
 
-#define BD_SC_EMPTY     0x8000  /* Receive is empty */
-#define BD_SC_READY     0x8000  /* Transmit is ready */
-#define BD_SC_WRAP      0x2000  /* Last buffer descriptor */
-#define BD_SC_INTRPT    0x1000  /* Interrupt on change */
-#define BD_SC_LAST      0x0800  /* Last buffer in frame */
-#define BD_SC_CM        0x0200  /* Continous mode */
-#define BD_SC_ID        0x0100  /* Rec'd too many idles */
-#define BD_SC_P         0x0100  /* xmt preamble */
-#define BD_SC_BR        0x0020  /* Break received */
-#define BD_SC_FR        0x0010  /* Framing error */
-#define BD_SC_PR        0x0008  /* Parity error */
-#define BD_SC_OV        0x0002  /* Overrun */
-#define BD_SC_CD        0x0001  /* ?? */
-
 /* Alignment */
 #define QE_INTR_TABLE_ALIGN     16      /* ??? */
 #define QE_ALIGNMENT_OF_BD      8