ENGR00308060-3 mcc: add sema4 driver required by mcc

- add linux sema4 driver, that mandatory required by mcc.
  - use volatile types in sema4 structure
  - align the port definiton a9 is 1, m4 is 2.

Signed-off-by: Richard Zhu <r65037@freescale.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/include/linux/imx_sema4.h b/include/linux/imx_sema4.h
new file mode 100644
index 000000000000..51a25e1b51bc
--- /dev/null
+++ b/include/linux/imx_sema4.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_IMX_SEMA4_H__
+#define __LINUX_IMX_SEMA4_H__
+
+/* semaphore number */
+#define MCC_SHMEM_SEMAPHORE_NUMBER      (1)
+#define MCC_PRINTF_SEMAPHORE_NUMBER     (2)
+#define MCC_I2C_SEMAPHORE_NUMBER        (3)
+#define MCC_RESERVED1_SEMAPHORE_NUMBER  (4)
+#define MCC_RESERVED2_SEMAPHORE_NUMBER  (5)
+
+#define SEMA4_NUM_DEVICES       1
+#define SEMA4_NUM_GATES         16
+
+#define SEMA4_UNLOCK    0x00
+#define SEMA4_A9_LOCK   0x01
+#define SEMA4_GATE_MASK 0x03
+
+#define CORE_MUTEX_VALID        (('c'<<24)|('m'<<24)|('t'<<24)|'x')
+
+/*
+ * The enumerates
+ */
+enum {
+        /* sema4 registers offset */
+        SEMA4_CP0INE    = 0x40,
+        SEMA4_CP1INE    = 0x48,
+        SEMA4_CP0NTF    = 0x80,
+        SEMA4_CP1NTF    = 0x88,
+};
+
+static const unsigned int idx_sema4[16] = {
+        1 << 7, 1 << 6, 1 << 5, 1 << 4,
+        1 << 3, 1 << 2, 1 << 1, 1 << 0,
+        1 << 15, 1 << 14, 1 << 13, 1 << 12,
+        1 << 11, 1 << 10, 1 << 9, 1 << 8,
+};
+
+struct imx_sema4_mutex {
+        u32                     valid;
+        u32                     gate_num;
+        unsigned char           gate_val;
+        wait_queue_head_t       wait_q;
+};
+
+struct imx_sema4_mutex_device {
+        struct device           *dev;
+        u16                     cpntf_val;
+        u16                     cpine_val;
+        void __iomem            *ioaddr;        /* Mapped address */
+        spinlock_t              lock;           /* Mutex */
+        int                     irq;
+
+        u16                     alloced;
+        struct imx_sema4_mutex  *mutex_ptr[16];
+};
+
+struct imx_sema4_mutex *
+        imx_sema4_mutex_create(u32 dev_num, u32 mutex_num);
+int imx_sema4_mutex_destroy(struct imx_sema4_mutex *mutex_ptr);
+int imx_sema4_mutex_trylock(struct imx_sema4_mutex *mutex_ptr);
+int imx_sema4_mutex_lock(struct imx_sema4_mutex *mutex_ptr);
+int imx_sema4_mutex_unlock(struct imx_sema4_mutex *mutex_ptr);
+#endif /* __LINUX_IMX_SEMA4_H__ */