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OpenCloudOS-Kernel/include/linux/dma/dw.h

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dmaengine: dw: split dma-dw.h to platform and private parts The introduced include/linux/dma/dw.h is going to contain the private extensions and structures which are shared for dw_dmac users in the kernel. Meanwhile include/linux/platform_data/dma-dw.h keeps only platform related data types and definitions. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:11 +08:00
/*
* Driver for the Synopsys DesignWare DMA Controller
*
* Copyright (C) 2007 Atmel Corporation
* Copyright (C) 2010-2011 ST Microelectronics
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
* Copyright (C) 2014 Intel Corporation
dmaengine: dw: split dma-dw.h to platform and private parts The introduced include/linux/dma/dw.h is going to contain the private extensions and structures which are shared for dw_dmac users in the kernel. Meanwhile include/linux/platform_data/dma-dw.h keeps only platform related data types and definitions. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:11 +08:00
*
* 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 _DMA_DW_H
#define _DMA_DW_H
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
#include <linux/clk.h>
#include <linux/device.h>
dmaengine: dw: split dma-dw.h to platform and private parts The introduced include/linux/dma/dw.h is going to contain the private extensions and structures which are shared for dw_dmac users in the kernel. Meanwhile include/linux/platform_data/dma-dw.h keeps only platform related data types and definitions. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:11 +08:00
#include <linux/dmaengine.h>
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
#include <linux/platform_data/dma-dw.h>
struct dw_dma;
/**
* struct dw_dma_chip - representation of DesignWare DMA controller hardware
* @dev: struct device of the DMA controller
dmaengine: dw: register IRQ and DMA pool with instance ID It is really useful not only for debugging to have an IRQ line and DMA pool labeled with driver and its instance ID. Do this for DesignWare DMA driver. All current users of this IP would be enhanced later on. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-01-17 19:57:26 +08:00
* @id: instance ID
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
* @irq: irq line
* @regs: memory mapped I/O space
* @clk: hclk clock
* @dw: struct dw_dma that is filed by dw_dma_probe()
dmaengine: dw: pass platform data via struct dw_dma_chip We pass struct dw_dma_chip to dw_dma_probe() anyway, thus we may use it to pass a platform data as well. While here, constify the source of the platform data. Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-04-27 19:15:40 +08:00
* @pdata: pointer to platform data
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
*/
struct dw_dma_chip {
struct device *dev;
dmaengine: dw: register IRQ and DMA pool with instance ID It is really useful not only for debugging to have an IRQ line and DMA pool labeled with driver and its instance ID. Do this for DesignWare DMA driver. All current users of this IP would be enhanced later on. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-01-17 19:57:26 +08:00
int id;
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
int irq;
void __iomem *regs;
struct clk *clk;
struct dw_dma *dw;
dmaengine: dw: pass platform data via struct dw_dma_chip We pass struct dw_dma_chip to dw_dma_probe() anyway, thus we may use it to pass a platform data as well. While here, constify the source of the platform data. Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-04-27 19:15:40 +08:00
const struct dw_dma_platform_data *pdata;
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
};
/* Export to the platform drivers */
dmaengine: dw: provide probe(), remove() stubs for users Some users consider DMA optional, thus when driver is not compiled we shouldn't prevent compilation of the users. Add stubs for dw_dma_probe() and dw_dma_remove(). Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-18 00:20:23 +08:00
#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
dmaengine: dw: pass platform data via struct dw_dma_chip We pass struct dw_dma_chip to dw_dma_probe() anyway, thus we may use it to pass a platform data as well. While here, constify the source of the platform data. Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-04-27 19:15:40 +08:00
int dw_dma_probe(struct dw_dma_chip *chip);
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
int dw_dma_remove(struct dw_dma_chip *chip);
dmaengine: dw: provide probe(), remove() stubs for users Some users consider DMA optional, thus when driver is not compiled we shouldn't prevent compilation of the users. Add stubs for dw_dma_probe() and dw_dma_remove(). Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Bryan O'Donoghue <pure.logic@nexus-software.ie> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-18 00:20:23 +08:00
#else
static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
#endif /* CONFIG_DW_DMAC_CORE */
dmaengine: dw: export probe()/remove() and Co to users The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:15 +08:00
dmaengine: dw: split dma-dw.h to platform and private parts The introduced include/linux/dma/dw.h is going to contain the private extensions and structures which are shared for dw_dmac users in the kernel. Meanwhile include/linux/platform_data/dma-dw.h keeps only platform related data types and definitions. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-23 22:18:11 +08:00
#endif /* _DMA_DW_H */