[PATCH v3 2/3] qe_common: add qe common functions into qe_common.c
Zhao Qiang
B45475 at freescale.com
Thu Oct 30 18:31:03 AEDT 2014
qe need to call some common functions,
add a new file drivers/soc/fsl-qe/qe_common.c
for them.
Signed-off-by: Zhao Qiang <B45475 at freescale.com>
---
drivers/soc/fsl-qe/Makefile | 2 +-
drivers/soc/fsl-qe/qe_common.c | 185 +++++++++++++++++++++++++++++++++++++++++
include/linux/fsl/qe.h | 52 ++++++++++--
3 files changed, 230 insertions(+), 9 deletions(-)
create mode 100644 drivers/soc/fsl-qe/qe_common.c
diff --git a/drivers/soc/fsl-qe/Makefile b/drivers/soc/fsl-qe/Makefile
index f1855c1..77f6fd9 100644
--- a/drivers/soc/fsl-qe/Makefile
+++ b/drivers/soc/fsl-qe/Makefile
@@ -1,7 +1,7 @@
#
# Makefile for the linux ppc-specific parts of QE
#
-obj-$(CONFIG_QUICC_ENGINE)+= qe.o qe_ic.o qe_io.o
+obj-$(CONFIG_QUICC_ENGINE)+= qe.o qe_ic.o qe_io.o qe_common.o
obj-$(CONFIG_UCC) += ucc.o
obj-$(CONFIG_UCC_SLOW) += ucc_slow.o
diff --git a/drivers/soc/fsl-qe/qe_common.c b/drivers/soc/fsl-qe/qe_common.c
new file mode 100644
index 0000000..c82ddcc
--- /dev/null
+++ b/drivers/soc/fsl-qe/qe_common.c
@@ -0,0 +1,185 @@
+/*
+ * Common QE code
+ *
+ * Author: Scott Wood <scottwood at freescale.com>
+ *
+ * Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
+ *
+ * Some parts derived from commproc.c/cpm2_common.c, which is:
+ * Copyright (c) 1997 Dan error_act (dmalek at jlc.net)
+ * Copyright (c) 1999-2001 Dan Malek <dan at embeddedalley.com>
+ * Copyright (c) 2000 MontaVista Software, Inc (source at mvista.com)
+ * 2006 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug at ru.mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/of_device.h>
+#include <linux/spinlock.h>
+#include <linux/export.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include <linux/io.h>
+#include <asm/rheap.h>
+#include <linux/fsl/qe.h>
+
+static spinlock_t qe_muram_lock;
+static rh_block_t qe_boot_muram_rh_block[16];
+static rh_info_t qe_muram_info;
+static u8 __iomem *muram_vbase;
+static phys_addr_t muram_pbase;
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS 4
+
+int qe_muram_init(void)
+{
+ struct device_node *np;
+ struct resource r;
+ u32 zero[OF_MAX_ADDR_CELLS] = {};
+ resource_size_t max = 0;
+ int i = 0;
+ int ret = 0;
+
+ if (muram_pbase)
+ return 0;
+
+ spin_lock_init(&qe_muram_lock);
+ /* 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);
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,qe-muram-data");
+ if (!np) {
+ /* try legacy bindings */
+ np = of_find_node_by_name(NULL, "data-only");
+ if (!np) {
+ pr_err("Cannot find CPM muram data node");
+ ret = -ENODEV;
+ goto out;
+ }
+ }
+
+ muram_pbase = of_translate_address(np, zero);
+ if (muram_pbase == (phys_addr_t)OF_BAD_ADDR) {
+ pr_err("Cannot translate zero through CPM muram node");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ while (of_address_to_resource(np, i++, &r) == 0) {
+ if (r.end > max)
+ max = r.end;
+
+ rh_attach_region(&qe_muram_info, r.start - muram_pbase,
+ resource_size(&r));
+ }
+
+ muram_vbase = ioremap(muram_pbase, max - muram_pbase + 1);
+ if (!muram_vbase) {
+ pr_err("Cannot map CPM muram");
+ ret = -ENOMEM;
+ }
+
+out:
+ of_node_put(np);
+ return ret;
+}
+
+/**
+ * qe_muram_alloc - allocate the requested size worth of multi-user ram
+ * @size: number of bytes to allocate
+ * @align: requested alignment, in bytes
+ *
+ * This function returns an offset into the muram area.
+ * Use qe_dpram_addr() to get the virtual address of the area.
+ * Use qe_muram_free() to free the allocation.
+ */
+unsigned long qe_muram_alloc(unsigned long size, unsigned long align)
+{
+ unsigned long start;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qe_muram_lock, flags);
+ qe_muram_info.alignment = align;
+ start = rh_alloc(&qe_muram_info, size, "commproc");
+ memset(qe_muram_addr(start), 0, size);
+ spin_unlock_irqrestore(&qe_muram_lock, flags);
+
+ return start;
+}
+EXPORT_SYMBOL(qe_muram_alloc);
+
+/**
+ * qe_muram_free - free a chunk of multi-user ram
+ * @offset: The beginning of the chunk as returned by 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);
+
+/**
+ * qe_muram_alloc_fixed - reserve a specific region of multi-user ram
+ * @offset: the offset into the muram area to reserve
+ * @size: the number of bytes to reserve
+ *
+ * This function returns "start" on success, -ENOMEM on failure.
+ * Use qe_dpram_addr() to get the virtual address of the area.
+ * Use qe_muram_free() to free the allocation.
+ */
+unsigned long qe_muram_alloc_fixed(unsigned long offset, unsigned long size)
+{
+ unsigned long start;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qe_muram_lock, flags);
+ qe_muram_info.alignment = 1;
+ 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);
+
+/**
+ * qe_muram_addr - turn a muram offset into a virtual address
+ * @offset: muram offset to convert
+ */
+void __iomem *qe_muram_addr(unsigned long offset)
+{
+ return muram_vbase + offset;
+}
+EXPORT_SYMBOL(qe_muram_addr);
+
+unsigned long qe_muram_offset(void __iomem *addr)
+{
+ return addr - (void __iomem *)muram_vbase;
+}
+EXPORT_SYMBOL(qe_muram_offset);
+
+/**
+ * qe_muram_dma - turn a muram virtual address into a DMA address
+ * @offset: virtual address from qe_muram_addr() to convert
+ */
+dma_addr_t qe_muram_dma(void __iomem *addr)
+{
+ return muram_pbase + ((u8 __iomem *)addr - muram_vbase);
+}
+EXPORT_SYMBOL(qe_muram_dma);
diff --git a/include/linux/fsl/qe.h b/include/linux/fsl/qe.h
index 1c9d626..8ac5a8c 100644
--- a/include/linux/fsl/qe.h
+++ b/include/linux/fsl/qe.h
@@ -19,7 +19,8 @@
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/err.h>
-#include <asm/cpm.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/fsl/immap_qe.h>
#define QE_NUM_OF_SNUM 256 /* There are 256 serial number in QE */
@@ -186,13 +187,48 @@ static inline int qe_alive_during_sleep(void)
#endif
}
-/* 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
+int qe_muram_init(void);
+
+#if defined(CONFIG_QUICC_ENGINE)
+unsigned long qe_muram_alloc(unsigned long size, unsigned long align);
+int qe_muram_free(unsigned long offset);
+unsigned long qe_muram_alloc_fixed(unsigned long offset, unsigned long size);
+void __iomem *qe_muram_addr(unsigned long offset);
+unsigned long qe_muram_offset(void __iomem *addr);
+dma_addr_t qe_muram_dma(void __iomem *addr);
+#else
+static inline unsigned long qe_muram_alloc(unsigned long size,
+ unsigned long align)
+{
+ return -ENOSYS;
+}
+
+static inline int qe_muram_free(unsigned long offset)
+{
+ return -ENOSYS;
+}
+
+static inline unsigned long qe_muram_alloc_fixed(unsigned long offset,
+ unsigned long size)
+{
+ return -ENOSYS;
+}
+
+static inline void __iomem *qe_muram_addr(unsigned long offset)
+{
+ return NULL;
+}
+
+static inline unsigned long qe_muram_offset(void __iomem *addr)
+{
+ return -ENOSYS;
+}
+
+static inline dma_addr_t qe_muram_dma(void __iomem *addr)
+{
+ return 0;
+}
+#endif /* defined(CONFIG_QUICC_ENGINE) */
/* Structure that defines QE firmware binary files.
*
--
2.1.0.27.g96db324
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