linux-imx

/*

 * SPI driver for Nvidia's Tegra20/Tegra30 SLINK Controller.

 *

 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

​

#include <linux/clk.h>

#include <linux/completion.h>

#include <linux/delay.h>

#include <linux/dmaengine.h>

#include <linux/dma-mapping.h>

#include <linux/dmapool.h>

#include <linux/err.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/kthread.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/reset.h>

#include <linux/spi/spi.h>

​

#define SLINK_COMMAND           0x000

#define SLINK_BIT_LENGTH(x)     (((x) & 0x1f) << 0)

#define SLINK_WORD_SIZE(x)      (((x) & 0x1f) << 5)

#define SLINK_BOTH_EN           (1 << 10)

#define SLINK_CS_SW         (1 << 11)

#define SLINK_CS_VALUE          (1 << 12)

#define SLINK_CS_POLARITY       (1 << 13)

#define SLINK_IDLE_SDA_DRIVE_LOW    (0 << 16)

#define SLINK_IDLE_SDA_DRIVE_HIGH   (1 << 16)

#define SLINK_IDLE_SDA_PULL_LOW     (2 << 16)

#define SLINK_IDLE_SDA_PULL_HIGH    (3 << 16)

#define SLINK_IDLE_SDA_MASK     (3 << 16)

#define SLINK_CS_POLARITY1      (1 << 20)

#define SLINK_CK_SDA            (1 << 21)

#define SLINK_CS_POLARITY2      (1 << 22)

#define SLINK_CS_POLARITY3      (1 << 23)

#define SLINK_IDLE_SCLK_DRIVE_LOW   (0 << 24)

#define SLINK_IDLE_SCLK_DRIVE_HIGH  (1 << 24)

#define SLINK_IDLE_SCLK_PULL_LOW    (2 << 24)

#define SLINK_IDLE_SCLK_PULL_HIGH   (3 << 24)

#define SLINK_IDLE_SCLK_MASK        (3 << 24)

#define SLINK_M_S           (1 << 28)

#define SLINK_WAIT          (1 << 29)

#define SLINK_GO            (1 << 30)

#define SLINK_ENB           (1 << 31)

​