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Release 4.11 drivers/dma/imx-sdma.c

Directory: drivers/dma
/*
 * drivers/dma/imx-sdma.c
 *
 * This file contains a driver for the Freescale Smart DMA engine
 *
 * Copyright 2010 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
 *
 * Based on code from Freescale:
 *
 * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#include <linux/init.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/semaphore.h>
#include <linux/spinlock.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/firmware.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/dmaengine.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_dma.h>

#include <asm/irq.h>
#include <linux/platform_data/dma-imx-sdma.h>
#include <linux/platform_data/dma-imx.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>

#include "dmaengine.h"

/* SDMA registers */

#define SDMA_H_C0PTR		0x000

#define SDMA_H_INTR		0x004

#define SDMA_H_STATSTOP		0x008

#define SDMA_H_START		0x00c

#define SDMA_H_EVTOVR		0x010

#define SDMA_H_DSPOVR		0x014

#define SDMA_H_HOSTOVR		0x018

#define SDMA_H_EVTPEND		0x01c

#define SDMA_H_DSPENBL		0x020

#define SDMA_H_RESET		0x024

#define SDMA_H_EVTERR		0x028

#define SDMA_H_INTRMSK		0x02c

#define SDMA_H_PSW		0x030

#define SDMA_H_EVTERRDBG	0x034

#define SDMA_H_CONFIG		0x038

#define SDMA_ONCE_ENB		0x040

#define SDMA_ONCE_DATA		0x044

#define SDMA_ONCE_INSTR		0x048

#define SDMA_ONCE_STAT		0x04c

#define SDMA_ONCE_CMD		0x050

#define SDMA_EVT_MIRROR		0x054

#define SDMA_ILLINSTADDR	0x058

#define SDMA_CHN0ADDR		0x05c

#define SDMA_ONCE_RTB		0x060

#define SDMA_XTRIG_CONF1	0x070

#define SDMA_XTRIG_CONF2	0x074

#define SDMA_CHNENBL0_IMX35	0x200

#define SDMA_CHNENBL0_IMX31	0x080

#define SDMA_CHNPRI_0		0x100

/*
 * Buffer descriptor status values.
 */

#define BD_DONE  0x01

#define BD_WRAP  0x02

#define BD_CONT  0x04

#define BD_INTR  0x08

#define BD_RROR  0x10

#define BD_LAST  0x20

#define BD_EXTD  0x80

/*
 * Data Node descriptor status values.
 */

#define DND_END_OF_FRAME  0x80

#define DND_END_OF_XFER   0x40

#define DND_DONE          0x20

#define DND_UNUSED        0x01

/*
 * IPCV2 descriptor status values.
 */

#define BD_IPCV2_END_OF_FRAME  0x40


#define IPCV2_MAX_NODES        50
/*
 * Error bit set in the CCB status field by the SDMA,
 * in setbd routine, in case of a transfer error
 */

#define DATA_ERROR  0x10000000

/*
 * Buffer descriptor commands.
 */

#define C0_ADDR             0x01

#define C0_LOAD             0x02

#define C0_DUMP             0x03

#define C0_SETCTX           0x07

#define C0_GETCTX           0x03

#define C0_SETDM            0x01

#define C0_SETPM            0x04

#define C0_GETDM            0x02

#define C0_GETPM            0x08
/*
 * Change endianness indicator in the BD command field
 */

#define CHANGE_ENDIANNESS   0x80

/*
 *  p_2_p watermark_level description
 *      Bits            Name                    Description
 *      0-7             Lower WML               Lower watermark level
 *      8               PS                      1: Pad Swallowing
 *                                              0: No Pad Swallowing
 *      9               PA                      1: Pad Adding
 *                                              0: No Pad Adding
 *      10              SPDIF                   If this bit is set both source
 *                                              and destination are on SPBA
 *      11              Source Bit(SP)          1: Source on SPBA
 *                                              0: Source on AIPS
 *      12              Destination Bit(DP)     1: Destination on SPBA
 *                                              0: Destination on AIPS
 *      13-15           ---------               MUST BE 0
 *      16-23           Higher WML              HWML
 *      24-27           N                       Total number of samples after
 *                                              which Pad adding/Swallowing
 *                                              must be done. It must be odd.
 *      28              Lower WML Event(LWE)    SDMA events reg to check for
 *                                              LWML event mask
 *                                              0: LWE in EVENTS register
 *                                              1: LWE in EVENTS2 register
 *      29              Higher WML Event(HWE)   SDMA events reg to check for
 *                                              HWML event mask
 *                                              0: HWE in EVENTS register
 *                                              1: HWE in EVENTS2 register
 *      30              ---------               MUST BE 0
 *      31              CONT                    1: Amount of samples to be
 *                                              transferred is unknown and
 *                                              script will keep on
 *                                              transferring samples as long as
 *                                              both events are detected and
 *                                              script must be manually stopped
 *                                              by the application
 *                                              0: The amount of samples to be
 *                                              transferred is equal to the
 *                                              count field of mode word
 */

#define SDMA_WATERMARK_LEVEL_LWML	0xFF

#define SDMA_WATERMARK_LEVEL_PS		BIT(8)

#define SDMA_WATERMARK_LEVEL_PA		BIT(9)

#define SDMA_WATERMARK_LEVEL_SPDIF	BIT(10)

#define SDMA_WATERMARK_LEVEL_SP		BIT(11)

#define SDMA_WATERMARK_LEVEL_DP		BIT(12)

#define SDMA_WATERMARK_LEVEL_HWML	(0xFF << 16)

#define SDMA_WATERMARK_LEVEL_LWE	BIT(28)

#define SDMA_WATERMARK_LEVEL_HWE	BIT(29)

#define SDMA_WATERMARK_LEVEL_CONT	BIT(31)

/*
 * Mode/Count of data node descriptors - IPCv2
 */

struct sdma_mode_count {
	
u32 count   : 16; /* size of the buffer pointed by this BD */
	
u32 status  :  8; /* E,R,I,C,W,D status bits stored here */
	
u32 command :  8; /* command mostly used for channel 0 */
};

/*
 * Buffer descriptor
 */

struct sdma_buffer_descriptor {
	
struct sdma_mode_count  mode;
	
u32 buffer_addr;	/* address of the buffer described */
	
u32 ext_buffer_addr;	/* extended buffer address */
} __attribute__ ((packed));

/**
 * struct sdma_channel_control - Channel control Block
 *
 * @current_bd_ptr      current buffer descriptor processed
 * @base_bd_ptr         first element of buffer descriptor array
 * @unused              padding. The SDMA engine expects an array of 128 byte
 *                      control blocks
 */

struct sdma_channel_control {
	
u32 current_bd_ptr;
	
u32 base_bd_ptr;
	
u32 unused[2];
} __attribute__ ((packed));

/**
 * struct sdma_state_registers - SDMA context for a channel
 *
 * @pc:         program counter
 * @t:          test bit: status of arithmetic & test instruction
 * @rpc:        return program counter
 * @sf:         source fault while loading data
 * @spc:        loop start program counter
 * @df:         destination fault while storing data
 * @epc:        loop end program counter
 * @lm:         loop mode
 */

struct sdma_state_registers {
	
u32 pc     :14;
	
u32 unused1: 1;
	
u32 t      : 1;
	
u32 rpc    :14;
	
u32 unused0: 1;
	
u32 sf     : 1;
	
u32 spc    :14;
	
u32 unused2: 1;
	
u32 df     : 1;
	
u32 epc    :14;
	
u32 lm     : 2;
} __attribute__ ((packed));

/**
 * struct sdma_context_data - sdma context specific to a channel
 *
 * @channel_state:      channel state bits
 * @gReg:               general registers
 * @mda:                burst dma destination address register
 * @msa:                burst dma source address register
 * @ms:                 burst dma status register
 * @md:                 burst dma data register
 * @pda:                peripheral dma destination address register
 * @psa:                peripheral dma source address register
 * @ps:                 peripheral dma status register
 * @pd:                 peripheral dma data register
 * @ca:                 CRC polynomial register
 * @cs:                 CRC accumulator register
 * @dda:                dedicated core destination address register
 * @dsa:                dedicated core source address register
 * @ds:                 dedicated core status register
 * @dd:                 dedicated core data register
 */

struct sdma_context_data {
	
struct sdma_state_registers  channel_state;
	
u32  gReg[8];
	
u32  mda;
	
u32  msa;
	
u32  ms;
	
u32  md;
	
u32  pda;
	
u32  psa;
	
u32  ps;
	
u32  pd;
	
u32  ca;
	
u32  cs;
	
u32  dda;
	
u32  dsa;
	
u32  ds;
	
u32  dd;
	
u32  scratch0;
	
u32  scratch1;
	
u32  scratch2;
	
u32  scratch3;
	
u32  scratch4;
	
u32  scratch5;
	
u32  scratch6;
	
u32  scratch7;
} __attribute__ ((packed));


#define NUM_BD (int)(PAGE_SIZE / sizeof(struct sdma_buffer_descriptor))

struct sdma_engine;

/**
 * struct sdma_channel - housekeeping for a SDMA channel
 *
 * @sdma                pointer to the SDMA engine for this channel
 * @channel             the channel number, matches dmaengine chan_id + 1
 * @direction           transfer type. Needed for setting SDMA script
 * @peripheral_type     Peripheral type. Needed for setting SDMA script
 * @event_id0           aka dma request line
 * @event_id1           for channels that use 2 events
 * @word_size           peripheral access size
 * @buf_tail            ID of the buffer that was processed
 * @buf_ptail           ID of the previous buffer that was processed
 * @num_bd              max NUM_BD. number of descriptors currently handling
 */

struct sdma_channel {
	
struct sdma_engine		*sdma;
	
unsigned int			channel;
	
enum dma_transfer_direction		direction;
	
enum sdma_peripheral_type	peripheral_type;
	
unsigned int			event_id0;
	
unsigned int			event_id1;
	
enum dma_slave_buswidth		word_size;
	
unsigned int			buf_tail;
	
unsigned int			buf_ptail;
	
unsigned int			num_bd;
	
unsigned int			period_len;
	
struct sdma_buffer_descriptor	*bd;
	
dma_addr_t			bd_phys;
	

unsigned int			pc_from_device, pc_to_device;
	
unsigned int			device_to_device;
	
unsigned long			flags;
	

dma_addr_t			per_address, per_address2;
	
unsigned long			event_mask[2];
	
unsigned long			watermark_level;
	

u32				shp_addr, per_addr;
	
struct dma_chan			chan;
	
spinlock_t			lock;
	
struct dma_async_tx_descriptor	desc;
	
enum dma_status			status;
	
unsigned int			chn_count;
	
unsigned int			chn_real_count;
	
struct tasklet_struct		tasklet;
	
struct imx_dma_data		data;
};


#define IMX_DMA_SG_LOOP		BIT(0)


#define MAX_DMA_CHANNELS 32

#define MXC_SDMA_DEFAULT_PRIORITY 1

#define MXC_SDMA_MIN_PRIORITY 1

#define MXC_SDMA_MAX_PRIORITY 7


#define SDMA_FIRMWARE_MAGIC 0x414d4453

/**
 * struct sdma_firmware_header - Layout of the firmware image
 *
 * @magic               "SDMA"
 * @version_major       increased whenever layout of struct sdma_script_start_addrs
 *                      changes.
 * @version_minor       firmware minor version (for binary compatible changes)
 * @script_addrs_start  offset of struct sdma_script_start_addrs in this image
 * @num_script_addrs    Number of script addresses in this image
 * @ram_code_start      offset of SDMA ram image in this firmware image
 * @ram_code_size       size of SDMA ram image
 * @script_addrs        Stores the start address of the SDMA scripts
 *                      (in SDMA memory space)
 */

struct sdma_firmware_header {
	
u32	magic;
	
u32	version_major;
	
u32	version_minor;
	
u32	script_addrs_start;
	
u32	num_script_addrs;
	
u32	ram_code_start;
	
u32	ram_code_size;
};


struct sdma_driver_data {
	
int chnenbl0;
	
int num_events;
	
struct sdma_script_start_addrs	*script_addrs;
};


struct sdma_engine {
	
struct device			*dev;
	
struct device_dma_parameters	dma_parms;
	
struct sdma_channel		channel[MAX_DMA_CHANNELS];
	
struct sdma_channel_control	*channel_control;
	
void __iomem			*regs;
	
struct sdma_context_data	*context;
	
dma_addr_t			context_phys;
	
struct dma_device		dma_device;
	
struct clk			*clk_ipg;
	
struct clk			*clk_ahb;
	
spinlock_t			channel_0_lock;
	
u32				script_number;
	
struct sdma_script_start_addrs	*script_addrs;
	
const struct sdma_driver_data	*drvdata;
	
u32				spba_start_addr;
	
u32				spba_end_addr;
	
unsigned int			irq;
};


static struct sdma_driver_data sdma_imx31 = {
	.chnenbl0 = SDMA_CHNENBL0_IMX31,
	.num_events = 32,
};


static struct sdma_script_start_addrs sdma_script_imx25 = {
	.ap_2_ap_addr = 729,
	.uart_2_mcu_addr = 904,
	.per_2_app_addr = 1255,
	.mcu_2_app_addr = 834,
	.uartsh_2_mcu_addr = 1120,
	.per_2_shp_addr = 1329,
	.mcu_2_shp_addr = 1048,
	.ata_2_mcu_addr = 1560,
	.mcu_2_ata_addr = 1479,
	.app_2_per_addr = 1189,
	.app_2_mcu_addr = 770,
	.shp_2_per_addr = 1407,
	.shp_2_mcu_addr = 979,
};


static struct sdma_driver_data sdma_imx25 = {
	.chnenbl0 = SDMA_CHNENBL0_IMX35,
	.num_events = 48,
	.script_addrs = &sdma_script_imx25,
};


static struct sdma_driver_data sdma_imx35 = {
	.chnenbl0 = SDMA_CHNENBL0_IMX35,
	.num_events = 48,
};


static struct sdma_script_start_addrs sdma_script_imx51 = {
	.ap_2_ap_addr = 642,
	.uart_2_mcu_addr = 817,
	.mcu_2_app_addr = 747,
	.mcu_2_shp_addr = 961,
	.ata_2_mcu_addr = 1473,
	.mcu_2_ata_addr = 1392,
	.app_2_per_addr = 1033,
	.app_2_mcu_addr = 683,
	.shp_2_per_addr = 1251,
	.shp_2_mcu_addr = 892,
};


static struct sdma_driver_data sdma_imx51 = {
	.chnenbl0 = SDMA_CHNENBL0_IMX35,
	.num_events = 48,
	.script_addrs = &sdma_script_imx51,
};


static struct sdma_script_start_addrs sdma_script_imx53 = {
	.ap_2_ap_addr = 642,
	.app_2_mcu_addr = 683,
	.mcu_2_app_addr = 747,
	.uart_2_mcu_addr = 817,
	.shp_2_mcu_addr = 891,
	.mcu_2_shp_addr = 960,
	.uartsh_2_mcu_addr = 1032,
	.spdif_2_mcu_addr = 1100,
	.mcu_2_spdif_addr = 1134,
	.firi_2_mcu_addr = 1193,
	.mcu_2_firi_addr = 1290,
};


static struct sdma_driver_data sdma_imx53 = {
	.chnenbl0 = SDMA_CHNENBL0_IMX35,
	.num_events = 48,
	.script_addrs = &sdma_script_imx53,
};


static struct sdma_script_start_addrs sdma_script_imx6q = {
	.ap_2_ap_addr = 642,
	.uart_2_mcu_addr = 817,
	.mcu_2_app_addr = 747,
	.per_2_per_addr = 6331,
	.uartsh_2_mcu_addr = 1032,
	.mcu_2_shp_addr = 960,
	.app_2_mcu_addr = 683,
	.shp_2_mcu_addr = 891,
	.spdif_2_mcu_addr = 1100,
	.mcu_2_spdif_addr = 1134,
};


static struct sdma_driver_data sdma_imx6q = {
	.chnenbl0 = SDMA_CHNENBL0_IMX35,
	.num_events = 48,
	.script_addrs = &sdma_script_imx6q,
};


static struct sdma_script_start_addrs sdma_script_imx7d = {
	.ap_2_ap_addr = 644,
	.uart_2_mcu_addr = 819,
	.mcu_2_app_addr = 749,
	.uartsh_2_mcu_addr = 1034,
	.mcu_2_shp_addr = 962,
	.app_2_mcu_addr = 685,
	.shp_2_mcu_addr = 893,
	.spdif_2_mcu_addr = 1102,
	.mcu_2_spdif_addr = 1136,
};


static struct sdma_driver_data sdma_imx7d = {
	.chnenbl0 = SDMA_CHNENBL0_IMX35,
	.num_events = 48,
	.script_addrs = &sdma_script_imx7d,
};


static const struct platform_device_id sdma_devtypes[] = {
	{
		.name = "imx25-sdma",
		.driver_data = (unsigned long)&sdma_imx25,
        }, {
		.name = "imx31-sdma",
		.driver_data = (unsigned long)&sdma_imx31,
        }, {
		.name = "imx35-sdma",
		.driver_data = (unsigned long)&sdma_imx35,
        }, {
		.name = "imx51-sdma",
		.driver_data = (unsigned long)&sdma_imx51,
        }, {
		.name = "imx53-sdma",
		.driver_data = (unsigned long)&sdma_imx53,
        }, {
		.name = "imx6q-sdma",
		.driver_data = (unsigned long)&sdma_imx6q,
        }, {
		.name = "imx7d-sdma",
		.driver_data = (unsigned long)&sdma_imx7d,
        }, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(platform, sdma_devtypes);


static const struct of_device_id sdma_dt_ids[] = {
	{ .compatible = "fsl,imx6q-sdma", .data = &sdma_imx6q, },
	{ .compatible = "fsl,imx53-sdma", .data = &sdma_imx53, },
	{ .compatible = "fsl,imx51-sdma", .data = &sdma_imx51, },
	{ .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, },
	{ .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
	{ .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, },
	{ .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sdma_dt_ids);


#define SDMA_H_CONFIG_DSPDMA	BIT(12) 
/* indicates if the DSPDMA is used */

#define SDMA_H_CONFIG_RTD_PINS	BIT(11) 
/* indicates if Real-Time Debug pins are enabled */

#define SDMA_H_CONFIG_ACR	BIT(4)  
/* indicates if AHB freq /core freq = 2 or 1 */

#define SDMA_H_CONFIG_CSM	(3)       
/* indicates which context switch mode is selected*/




static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event)
{
	u32 chnenbl0 = sdma->drvdata->chnenbl0;
	return chnenbl0 + event * 4;
}


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static int sdma_config_ownership(struct sdma_channel *sdmac,
		bool event_override, bool mcu_override, bool dsp_override)
{
	struct sdma_engine *sdma = sdmac->sdma;
	int channel = sdmac->channel;
	unsigned long evt, mcu, dsp;

	if (event_override && mcu_override && dsp_override)
		return -EINVAL;

	evt = readl_relaxed(sdma->regs + SDMA_H_EVTOVR);
	mcu = readl_relaxed(sdma->regs + SDMA_H_HOSTOVR);
	dsp = readl_relaxed(sdma->regs + SDMA_H_DSPOVR);

	if (dsp_override)
		__clear_bit(channel, &dsp);
	else
		__set_bit(channel, &dsp);

	if (event_override)
		__clear_bit(channel, &evt);
	else
		__set_bit(channel, &evt);

	if (mcu_override)
		__clear_bit(channel, &mcu);
	else
		__set_bit(channel, &mcu);

	writel_relaxed(evt, sdma->regs + SDMA_H_EVTOVR);
	writel_relaxed(mcu, sdma->regs + SDMA_H_HOSTOVR);
	writel_relaxed(dsp, sdma->regs + SDMA_H_DSPOVR);

	return 0;
}


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static void sdma_enable_channel(struct sdma_engine *sdma, int channel)
{
	writel(BIT(channel), sdma->regs + SDMA_H_START);
}


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/*
 * sdma_run_channel0 - run a channel and wait till it's done
 */



static int sdma_run_channel0(struct sdma_engine *sdma)
{
	int ret;
	u32 reg;

	sdma_enable_channel(sdma, 0);

	ret = readl_relaxed_poll_timeout_atomic(sdma->regs + SDMA_H_STATSTOP,
						reg, !(reg & 1), 1, 500);
	if (ret)
		dev_err(sdma->dev, "Timeout waiting for CH0 ready\n");

	/* Set bits of CONFIG register with dynamic context switching */
	if (readl(sdma->regs + SDMA_H_CONFIG) == 0)
		writel_relaxed(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG);

	return ret;
}


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static int sdma_load_script(struct sdma_engine *sdma, void *buf, int size,
		u32 address)
{
	struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd;
	void *buf_virt;
	dma_addr_t buf_phys;
	int ret;
	unsigned long flags;

	buf_virt = dma_alloc_coherent(NULL,
			size,
			&buf_phys, GFP_KERNEL);
	if (!buf_virt) {
		return -ENOMEM;
	}

	spin_lock_irqsave(&sdma->channel_0_lock, flags);

	bd0->mode.command = C0_SETPM;
	bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD;
	bd0->mode.count = size / 2;
	bd0->buffer_addr = buf_phys;
	bd0->ext_buffer_addr = address;

	memcpy(buf_virt, buf, size);

	ret = sdma_run_channel0(sdma);

	spin_unlock_irqrestore(&sdma->channel_0_lock, flags);

	dma_free_coherent(NULL, size, buf_virt, buf_phys);

	return ret;
}


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static void sdma_event_enable(struct sdma_channel *sdmac, unsigned int event)
{
	struct sdma_engine *sdma = sdmac->sdma;
	int channel = sdmac->channel;
	unsigned long val;
	u32 chnenbl = chnenbl_ofs(sdma, event);

	val = readl_relaxed(sdma->regs + chnenbl);
	__set_bit(channel, &val);
	writel_relaxed(val, sdma->regs + chnenbl);
}


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Sascha Hauer6586.67%133.33%


Richard Zhao1013.33%266.67%


Total75100.00%3100.00%






static void sdma_event_disable(struct sdma_channel *sdmac, unsigned int event)
{
	struct sdma_engine *sdma = sdmac->sdma;
	int channel = sdmac->channel;
	u32 chnenbl = chnenbl_ofs(sdma, event);
	unsigned long val;

	val = readl_relaxed(sdma->regs + chnenbl);
	__clear_bit(channel, &val);
	writel_relaxed(val, sdma->regs + chnenbl);
}


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Sascha Hauer6586.67%133.33%


Richard Zhao1013.33%266.67%


Total75100.00%3100.00%






static void sdma_update_channel_loop(struct sdma_channel *sdmac)
{
	struct sdma_buffer_descriptor *bd;
	int error = 0;
	enum dma_status	old_status = sdmac->status;

	/*
         * loop mode. Iterate over descriptors, re-setup them and
         * call callback function.
         */
	while (1) {
		bd = &sdmac->bd[sdmac->buf_tail];

		if (bd->mode.status & BD_DONE)
			break;

		if (bd->mode.status & BD_RROR) {
			bd->mode.status &= ~BD_RROR;
			sdmac->status = DMA_ERROR;
			error = -EIO;
		}

	       /*
                * We use bd->mode.count to calculate the residue, since contains
                * the number of bytes present in the current buffer descriptor.
                */

		sdmac->chn_real_count = bd->mode.count;
		bd->mode.status |= BD_DONE;
		bd->mode.count = sdmac->period_len;
		sdmac->buf_ptail = sdmac->buf_tail;
		sdmac->buf_tail = (sdmac->buf_tail + 1) % sdmac->num_bd;

		/*
                 * The callback is called from the interrupt context in order
                 * to reduce latency and to avoid the risk of altering the
                 * SDMA transaction status by the time the client tasklet is
                 * executed.
                 */

		dmaengine_desc_get_callback_invoke(&sdmac->desc, NULL);

		if (error)
			sdmac->status = old_status;
	}
}


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Sascha Hauer7143.03%120.00%


Russell King106.06%120.00%


Total165100.00%5100.00%






static void mxc_sdma_handle_channel_normal(unsigned long data)
{
	struct sdma_channel *sdmac = (struct sdma_channel *) data;
	struct sdma_buffer_descriptor *bd;
	int i, error = 0;

	sdmac->chn_real_count = 0;
	/*
         * non loop mode. Iterate over all descriptors, collect
         * errors and call callback function
         */
	for (i = 0; i < sdmac->num_bd; i++) {
		bd = &sdmac->bd[i];

		 if (bd->mode.status & (BD_DONE | BD_RROR))
			error = -EIO;
		 sdmac->chn_real_count += bd->mode.count;
	}

	if (error)
		sdmac->status = DMA_ERROR;
	else
		sdmac->status = DMA_COMPLETE;

	dma_cookie_complete(&sdmac->desc);

	dmaengine_desc_get_callback_invoke(&sdmac->desc, NULL);
}


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Sascha Hauer9068.18%116.67%


Huang Shijie2015.15%116.67%


Nandor Han139.85%116.67%


Russell King43.03%116.67%


Dave Jiang43.03%116.67%


Vinod Koul10.76%116.67%


Total132100.00%6100.00%






static irqreturn_t sdma_int_handler(int irq, void *dev_id)
{
	struct sdma_engine *sdma = dev_id;
	unsigned long stat;

	stat = readl_relaxed(sdma->regs + SDMA_H_INTR);
	writel_relaxed(stat, sdma->regs + SDMA_H_INTR);
	/* channel 0 is special and not handled here, see run_channel0() */
	stat &= ~1;

	while (stat) {
		int channel = fls(stat) - 1;
		struct sdma_channel *sdmac = &sdma->channel[channel];

		if (sdmac->flags & IMX_DMA_SG_LOOP)
			sdma_update_channel_loop(sdmac);
		else
			tasklet_schedule(&sdmac->tasklet);

		__clear_bit(channel, &stat);
	}

	return IRQ_HANDLED;
}


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Russell King1311.40%114.29%


Richard Zhao108.77%228.57%


Michael Olbrich65.26%114.29%


Huang Shijie43.51%114.29%


Nandor Han10.88%114.29%


Total114100.00%7100.00%



/*
 * sets the pc of SDMA script according to the peripheral type
 */



static void sdma_get_pc(struct sdma_channel *sdmac,
		enum sdma_peripheral_type peripheral_type)
{
	struct sdma_engine *sdma = sdmac->sdma;
	int per_2_emi = 0, emi_2_per = 0;
	/*
         * These are needed once we start to support transfers between
         * two peripherals or memory-to-memory transfers
         */
	int per_2_per = 0;

	sdmac->pc_from_device = 0;
	sdmac->pc_to_device = 0;
	sdmac->device_to_device = 0;

	switch (peripheral_type) {
	case IMX_DMATYPE_MEMORY:
		break;
	case IMX_DMATYPE_DSP:
		emi_2_per = sdma->script_addrs->bp_2_ap_addr;
		per_2_emi = sdma->script_addrs->ap_2_bp_addr;
		break;
	case IMX_DMATYPE_FIRI:
		per_2_emi = sdma->script_addrs->firi_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_firi_addr;
		break;
	case IMX_DMATYPE_UART:
		per_2_emi = sdma->script_addrs->uart_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_app_addr;
		break;
	case IMX_DMATYPE_UART_SP:
		per_2_emi = sdma->script_addrs->uartsh_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_shp_addr;
		break;
	case IMX_DMATYPE_ATA:
		per_2_emi = sdma->script_addrs->ata_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_ata_addr;
		break;
	case IMX_DMATYPE_CSPI:
	case IMX_DMATYPE_EXT:
	case IMX_DMATYPE_SSI:
	case IMX_DMATYPE_SAI:
		per_2_emi = sdma->script_addrs->app_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_app_addr;
		break;
	case IMX_DMATYPE_SSI_DUAL:
		per_2_emi = sdma->script_addrs->ssish_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_ssish_addr;
		break;
	case IMX_DMATYPE_SSI_SP:
	case IMX_DMATYPE_MMC:
	case IMX_DMATYPE_SDHC:
	case IMX_DMATYPE_CSPI_SP:
	case IMX_DMATYPE_ESAI:
	case IMX_DMATYPE_MSHC_SP:
		per_2_emi = sdma->script_addrs->shp_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_shp_addr;
		break;
	case IMX_DMATYPE_ASRC:
		per_2_emi = sdma->script_addrs->asrc_2_mcu_addr;
		emi_2_per = sdma->script_addrs->asrc_2_mcu_addr;
		per_2_per = sdma->script_addrs->per_2_per_addr;
		break;
	case IMX_DMATYPE_ASRC_SP:
		per_2_emi = sdma->script_addrs->shp_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_shp_addr;
		per_2_per = sdma->script_addrs->per_2_per_addr;
		break;
	case IMX_DMATYPE_MSHC:
		per_2_emi = sdma->script_addrs->mshc_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_mshc_addr;
		break;
	case IMX_DMATYPE_CCM:
		per_2_emi = sdma->script_addrs->dptc_dvfs_addr;
		break;
	case IMX_DMATYPE_SPDIF:
		per_2_emi = sdma->script_addrs->spdif_2_mcu_addr;
		emi_2_per = sdma->script_addrs->mcu_2_spdif_addr;
		break;
	case IMX_DMATYPE_IPU_MEMORY:
		emi_2_per = sdma->script_addrs->ext_mem_2_ipu_addr;
		break;
	default:
		break;
	}

	sdmac->pc_from_device = per_2_emi;
	sdmac->pc_to_device = emi_2_per;
	sdmac->device_to_device = per_2_per;
}


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Sascha Hauer32883.89%120.00%


Nicolin Chen5113.04%360.00%


Shengjiu Wang123.07%120.00%


Total391100.00%5100.00%






static int sdma_load_context(struct sdma_channel *sdmac)
{
	struct sdma_engine *sdma = sdmac->sdma;
	int channel = sdmac->channel;
	int load_address;
	struct sdma_context_data *context = sdma->context;
	struct sdma_buffer_descriptor *bd0 = sdma->channel[0].bd;
	int ret;
	unsigned long flags;

	if (sdmac->direction == DMA_DEV_TO_MEM)
		load_address = sdmac->pc_from_device;
	else if (sdmac->direction == DMA_DEV_TO_DEV)
		load_address = sdmac->device_to_device;
	else
		load_address = sdmac->pc_to_device;

	if (load_address < 0)
		return load_address;

	dev_dbg(sdma->dev, "load_address = %d\n", load_address);
	dev_dbg(sdma->dev, "wml = 0x%08x\n", (u32)sdmac->watermark_level);
	dev_dbg(sdma->dev, "shp_addr = 0x%08x\n", sdmac->shp_addr);
	dev_dbg(sdma->dev, "per_addr = 0x%08x\n", sdmac->per_addr);
	dev_dbg(sdma->dev, "event_mask0 = 0x%08x\n", (u32)sdmac->event_mask[0]);
	dev_dbg(sdma->dev, "event_mask1 = 0x%08x\n", (u32)sdmac->event_mask[1]);

	spin_lock_irqsave(&sdma->channel_0_lock, flags);

	memset(context, 0, sizeof(*context));
	context->channel_state.pc = load_address;

	/* Send by context the event mask,base address for peripheral
         * and watermark level
         */
	context->gReg[0] = sdmac->event_mask[1];
	context->gReg[1] = sdmac->event_mask[0];
	context->gReg[2] = sdmac->per_addr;
	context->gReg[6] = sdmac->shp_addr;
	context->gReg[7] = sdmac->watermark_level;

	bd0->mode.command = C0_SETDM;
	bd0->mode.status = BD_DONE | BD_INTR | BD_WRAP | BD_EXTD;
	bd0->mode.count = sizeof(*context) / 4;
	bd0->buffer_addr = sdma->context_phys;
	bd0->ext_buffer_addr = 2048 + (sizeof(*context) / 4) * channel;
	ret = sdma_run_channel0(sdma);

	spin_unlock_irqrestore(&sdma->channel_0_lock, flags);

	return ret;
}


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Sascha Hauer31985.98%233.33%


Richard Zhao369.70%233.33%


Shengjiu Wang154.04%116.67%


Vinod Koul10.27%116.67%


Total371100.00%6100.00%






static struct sdma_channel *to_sdma_chan(struct dma_chan *chan)
{
	return container_of(chan, struct sdma_channel, chan);
}


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Maxime Ripard24100.00%1100.00%


Total24100.00%1100.00%






static int sdma_disable_channel(struct dma_chan *chan)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	struct sdma_engine *sdma = sdmac->sdma;
	int channel = sdmac->channel;

	writel_relaxed(BIT(channel), sdma->regs + SDMA_H_STATSTOP);
	sdmac->status = DMA_ERROR;

	return 0;
}


Contributors
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Sascha Hauer4168.33%125.00%


Maxime Ripard1626.67%125.00%


Richard Zhao35.00%250.00%


Total60100.00%4100.00%






static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac)
{
	struct sdma_engine *sdma = sdmac->sdma;

	int lwml = sdmac->watermark_level & SDMA_WATERMARK_LEVEL_LWML;
	int hwml = (sdmac->watermark_level & SDMA_WATERMARK_LEVEL_HWML) >> 16;

	set_bit(sdmac->event_id0 % 32, &sdmac->event_mask[1]);
	set_bit(sdmac->event_id1 % 32, &sdmac->event_mask[0]);

	if (sdmac->event_id0 > 31)
		sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_LWE;

	if (sdmac->event_id1 > 31)
		sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_HWE;

	/*
         * If LWML(src_maxburst) > HWML(dst_maxburst), we need
         * swap LWML and HWML of INFO(A.3.2.5.1), also need swap
         * r0(event_mask[1]) and r1(event_mask[0]).
         */
	if (lwml > hwml) {
		sdmac->watermark_level &= ~(SDMA_WATERMARK_LEVEL_LWML |
						SDMA_WATERMARK_LEVEL_HWML);
		sdmac->watermark_level |= hwml;
		sdmac->watermark_level |= lwml << 16;
		swap(sdmac->event_mask[0], sdmac->event_mask[1]);
	}

	if (sdmac->per_address2 >= sdma->spba_start_addr &&
			sdmac->per_address2 <= sdma->spba_end_addr)
		sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_SP;

	if (sdmac->per_address >= sdma->spba_start_addr &&
			sdmac->per_address <= sdma->spba_end_addr)
		sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_DP;

	sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_CONT;
}


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Shengjiu Wang209100.00%1100.00%


Total209100.00%1100.00%






static int sdma_config_channel(struct dma_chan *chan)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	int ret;

	sdma_disable_channel(chan);

	sdmac->event_mask[0] = 0;
	sdmac->event_mask[1] = 0;
	sdmac->shp_addr = 0;
	sdmac->per_addr = 0;

	if (sdmac->event_id0) {
		if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
			return -EINVAL;
		sdma_event_enable(sdmac, sdmac->event_id0);
	}

	if (sdmac->event_id1) {
		if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events)
			return -EINVAL;
		sdma_event_enable(sdmac, sdmac->event_id1);
	}

	switch (sdmac->peripheral_type) {
	case IMX_DMATYPE_DSP:
		sdma_config_ownership(sdmac, false, true, true);
		break;
	case IMX_DMATYPE_MEMORY:
		sdma_config_ownership(sdmac, false, true, false);
		break;
	default:
		sdma_config_ownership(sdmac, true, true, false);
		break;
	}

	sdma_get_pc(sdmac, sdmac->peripheral_type);

	if ((sdmac->peripheral_type != IMX_DMATYPE_MEMORY) &&
			(sdmac->peripheral_type != IMX_DMATYPE_DSP)) {
		/* Handle multiple event channels differently */
		if (sdmac->event_id1) {
			if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP ||
			    sdmac->peripheral_type == IMX_DMATYPE_ASRC)
				sdma_set_watermarklevel_for_p2p(sdmac);
		} else
			__set_bit(sdmac->event_id0, sdmac->event_mask);

		/* Address */
		sdmac->shp_addr = sdmac->per_address;
		sdmac->per_addr = sdmac->per_address2;
	} else {
		sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */
	}

	ret = sdma_load_context(sdmac);

	return ret;
}


Contributors
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Sascha Hauer20170.28%233.33%


Shengjiu Wang5117.83%116.67%


Richard Zhao217.34%233.33%


Maxime Ripard134.55%116.67%


Total286100.00%6100.00%






static int sdma_set_channel_priority(struct sdma_channel *sdmac,
		unsigned int priority)
{
	struct sdma_engine *sdma = sdmac->sdma;
	int channel = sdmac->channel;

	if (priority < MXC_SDMA_MIN_PRIORITY
	    || priority > MXC_SDMA_MAX_PRIORITY) {
		return -EINVAL;
	}

	writel_relaxed(priority, sdma->regs + SDMA_CHNPRI_0 + 4 * channel);

	return 0;
}


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Sascha Hauer6498.46%150.00%


Richard Zhao11.54%150.00%


Total65100.00%2100.00%






static int sdma_request_channel(struct sdma_channel *sdmac)
{
	struct sdma_engine *sdma = sdmac->sdma;
	int channel = sdmac->channel;
	int ret = -EBUSY;

	sdmac->bd = dma_zalloc_coherent(NULL, PAGE_SIZE, &sdmac->bd_phys,
					GFP_KERNEL);
	if (!sdmac->bd) {
		ret = -ENOMEM;
		goto out;
	}

	sdma->channel_control[channel].base_bd_ptr = sdmac->bd_phys;
	sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys;

	sdma_set_channel_priority(sdmac, MXC_SDMA_DEFAULT_PRIORITY);
	return 0;
out:

	return ret;
}


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Sascha Hauer10899.08%150.00%


Joe Perches10.92%150.00%


Total109100.00%2100.00%






static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
{
	unsigned long flags;
	struct sdma_channel *sdmac = to_sdma_chan(tx->chan);
	dma_cookie_t cookie;

	spin_lock_irqsave(&sdmac->lock, flags);

	cookie = dma_cookie_assign(tx);

	spin_unlock_irqrestore(&sdmac->lock, flags);

	return cookie;
}


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Sascha Hauer4880.00%133.33%


Haitao Zhang1016.67%133.33%


Russell King23.33%133.33%


Total60100.00%3100.00%






static int sdma_alloc_chan_resources(struct dma_chan *chan)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	struct imx_dma_data *data = chan->private;
	int prio, ret;

	if (!data)
		return -EINVAL;

	switch (data->priority) {
	case DMA_PRIO_HIGH:
		prio = 3;
		break;
	case DMA_PRIO_MEDIUM:
		prio = 2;
		break;
	case DMA_PRIO_LOW:
	default:
		prio = 1;
		break;
	}

	sdmac->peripheral_type = data->peripheral_type;
	sdmac->event_id0 = data->dma_request;
	sdmac->event_id1 = data->dma_request2;

	ret = clk_enable(sdmac->sdma->clk_ipg);
	if (ret)
		return ret;
	ret = clk_enable(sdmac->sdma->clk_ahb);
	if (ret)
		goto disable_clk_ipg;

	ret = sdma_request_channel(sdmac);
	if (ret)
		goto disable_clk_ahb;

	ret = sdma_set_channel_priority(sdmac, prio);
	if (ret)
		goto disable_clk_ahb;

	dma_async_tx_descriptor_init(&sdmac->desc, chan);
	sdmac->desc.tx_submit = sdma_tx_submit;
	/* txd.flags will be overwritten in prep funcs */
	sdmac->desc.flags = DMA_CTRL_ACK;

	return 0;

disable_clk_ahb:
	clk_disable(sdmac->sdma->clk_ahb);
disable_clk_ipg:
	clk_disable(sdmac->sdma->clk_ipg);
	return ret;
}


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Fabio Estevam4922.07%116.67%


Richard Zhao125.41%233.33%


Shengjiu Wang83.60%116.67%


Total222100.00%6100.00%






static void sdma_free_chan_resources(struct dma_chan *chan)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	struct sdma_engine *sdma = sdmac->sdma;

	sdma_disable_channel(chan);

	if (sdmac->event_id0)
		sdma_event_disable(sdmac, sdmac->event_id0);
	if (sdmac->event_id1)
		sdma_event_disable(sdmac, sdmac->event_id1);

	sdmac->event_id0 = 0;
	sdmac->event_id1 = 0;

	sdma_set_channel_priority(sdmac, 0);

	dma_free_coherent(NULL, PAGE_SIZE, sdmac->bd, sdmac->bd_phys);

	clk_disable(sdma->clk_ipg);
	clk_disable(sdma->clk_ahb);
}


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Sascha Hauer11299.12%266.67%


Maxime Ripard10.88%133.33%


Total113100.00%3100.00%






static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
		struct dma_chan *chan, struct scatterlist *sgl,
		unsigned int sg_len, enum dma_transfer_direction direction,
		unsigned long flags, void *context)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	struct sdma_engine *sdma = sdmac->sdma;
	int ret, i, count;
	int channel = sdmac->channel;
	struct scatterlist *sg;

	if (sdmac->status == DMA_IN_PROGRESS)
		return NULL;
	sdmac->status = DMA_IN_PROGRESS;

	sdmac->flags = 0;

	sdmac->buf_tail = 0;
	sdmac->buf_ptail = 0;
	sdmac->chn_real_count = 0;

	dev_dbg(sdma->dev, "setting up %d entries for channel %d.\n",
			sg_len, channel);

	sdmac->direction = direction;
	ret = sdma_load_context(sdmac);
	if (ret)
		goto err_out;

	if (sg_len > NUM_BD) {
		dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n",
				channel, sg_len, NUM_BD);
		ret = -EINVAL;
		goto err_out;
	}

	sdmac->chn_count = 0;
	for_each_sg(sgl, sg, sg_len, i) {
		struct sdma_buffer_descriptor *bd = &sdmac->bd[i];
		int param;

		bd->buffer_addr = sg->dma_address;

		count = sg_dma_len(sg);

		if (count > 0xffff) {
			dev_err(sdma->dev, "SDMA channel %d: maximum bytes for sg entry exceeded: %d > %d\n",
					channel, count, 0xffff);
			ret = -EINVAL;
			goto err_out;
		}

		bd->mode.count = count;
		sdmac->chn_count += count;

		if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES) {
			ret =  -EINVAL;
			goto err_out;
		}

		switch (sdmac->word_size) {
		case DMA_SLAVE_BUSWIDTH_4_BYTES:
			bd->mode.command = 0;
			if (count & 3 || sg->dma_address & 3)
				return NULL;
			break;
		case DMA_SLAVE_BUSWIDTH_2_BYTES:
			bd->mode.command = 2;
			if (count & 1 || sg->dma_address & 1)
				return NULL;
			break;
		case DMA_SLAVE_BUSWIDTH_1_BYTE:
			bd->mode.command = 1;
			break;
		default:
			return NULL;
		}

		param = BD_DONE | BD_EXTD | BD_CONT;

		if (i + 1 == sg_len) {
			param |= BD_INTR;
			param |= BD_LAST;
			param &= ~BD_CONT;
		}

		dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n",
				i, count, (u64)sg->dma_address,
				param & BD_WRAP ? "wrap" : "",
				param & BD_INTR ? " intr" : "");

		bd->mode.status = param;
	}

	sdmac->num_bd = sg_len;
	sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys;

	return &sdmac->desc;
err_out:
	sdmac->status = DMA_ERROR;
	return NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer42288.28%323.08%


Shawn Guo132.72%215.38%


Nandor Han122.51%17.69%


Huang Shijie122.51%17.69%


Richard Zhao61.26%17.69%


Olof Johansson40.84%17.69%


Alexandre Bounine40.84%17.69%


Lars-Peter Clausen30.63%17.69%


Vinod Koul10.21%17.69%


Anatolij Gustschin10.21%17.69%


Total478100.00%13100.00%






static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
		size_t period_len, enum dma_transfer_direction direction,
		unsigned long flags)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	struct sdma_engine *sdma = sdmac->sdma;
	int num_periods = buf_len / period_len;
	int channel = sdmac->channel;
	int ret, i = 0, buf = 0;

	dev_dbg(sdma->dev, "%s channel: %d\n", __func__, channel);

	if (sdmac->status == DMA_IN_PROGRESS)
		return NULL;

	sdmac->status = DMA_IN_PROGRESS;

	sdmac->buf_tail = 0;
	sdmac->buf_ptail = 0;
	sdmac->chn_real_count = 0;
	sdmac->period_len = period_len;

	sdmac->flags |= IMX_DMA_SG_LOOP;
	sdmac->direction = direction;
	ret = sdma_load_context(sdmac);
	if (ret)
		goto err_out;

	if (num_periods > NUM_BD) {
		dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n",
				channel, num_periods, NUM_BD);
		goto err_out;
	}

	if (period_len > 0xffff) {
		dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %d > %d\n",
				channel, period_len, 0xffff);
		goto err_out;
	}

	while (buf < buf_len) {
		struct sdma_buffer_descriptor *bd = &sdmac->bd[i];
		int param;

		bd->buffer_addr = dma_addr;

		bd->mode.count = period_len;

		if (sdmac->word_size > DMA_SLAVE_BUSWIDTH_4_BYTES)
			goto err_out;
		if (sdmac->word_size == DMA_SLAVE_BUSWIDTH_4_BYTES)
			bd->mode.command = 0;
		else
			bd->mode.command = sdmac->word_size;

		param = BD_DONE | BD_EXTD | BD_CONT | BD_INTR;
		if (i + 1 == num_periods)
			param |= BD_WRAP;

		dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n",
				i, period_len, (u64)dma_addr,
				param & BD_WRAP ? "wrap" : "",
				param & BD_INTR ? " intr" : "");

		bd->mode.status = param;

		dma_addr += period_len;
		buf += period_len;

		i++;
	}

	sdmac->num_bd = num_periods;
	sdma->channel_control[channel].current_bd_ptr = sdmac->bd_phys;

	return &sdmac->desc;
err_out:
	sdmac->status = DMA_ERROR;
	return NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer36091.60%222.22%


Nandor Han123.05%111.11%


Russell King61.53%111.11%


Richard Zhao61.53%111.11%


Olof Johansson41.02%111.11%


Peter Ujfalusi30.76%111.11%


Vinod Koul10.25%111.11%


Alexandre Bounine10.25%111.11%


Total393100.00%9100.00%






static int sdma_config(struct dma_chan *chan,
		       struct dma_slave_config *dmaengine_cfg)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);

	if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) {
		sdmac->per_address = dmaengine_cfg->src_addr;
		sdmac->watermark_level = dmaengine_cfg->src_maxburst *
			dmaengine_cfg->src_addr_width;
		sdmac->word_size = dmaengine_cfg->src_addr_width;
	} else if (dmaengine_cfg->direction == DMA_DEV_TO_DEV) {
		sdmac->per_address2 = dmaengine_cfg->src_addr;
		sdmac->per_address = dmaengine_cfg->dst_addr;
		sdmac->watermark_level = dmaengine_cfg->src_maxburst &
			SDMA_WATERMARK_LEVEL_LWML;
		sdmac->watermark_level |= (dmaengine_cfg->dst_maxburst << 16) &
			SDMA_WATERMARK_LEVEL_HWML;
		sdmac->word_size = dmaengine_cfg->dst_addr_width;
	} else {
		sdmac->per_address = dmaengine_cfg->dst_addr;
		sdmac->watermark_level = dmaengine_cfg->dst_maxburst *
			dmaengine_cfg->dst_addr_width;
		sdmac->word_size = dmaengine_cfg->dst_addr_width;
	}
	sdmac->direction = dmaengine_cfg->direction;
	return sdma_config_channel(chan);
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer8651.19%116.67%


Shengjiu Wang5935.12%116.67%


Philippe Rétornaz84.76%116.67%


Huang Shijie84.76%116.67%


Maxime Ripard63.57%116.67%


Vinod Koul10.60%116.67%


Total168100.00%6100.00%






static enum dma_status sdma_tx_status(struct dma_chan *chan,
				      dma_cookie_t cookie,
				      struct dma_tx_state *txstate)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	u32 residue;

	if (sdmac->flags & IMX_DMA_SG_LOOP)
		residue = (sdmac->num_bd - sdmac->buf_ptail) *
			   sdmac->period_len - sdmac->chn_real_count;
	else
		residue = sdmac->chn_count - sdmac->chn_real_count;

	dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie,
			 residue);

	return sdmac->status;
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer4144.57%114.29%


Russell King4043.48%228.57%


Nandor Han55.43%228.57%


Andy Shevchenko33.26%114.29%


Shawn Guo33.26%114.29%


Total92100.00%7100.00%






static void sdma_issue_pending(struct dma_chan *chan)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	struct sdma_engine *sdma = sdmac->sdma;

	if (sdmac->status == DMA_IN_PROGRESS)
		sdma_enable_channel(sdma, sdmac->channel);
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer47100.00%2100.00%


Total47100.00%2100.00%




#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1	34

#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2	38

#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3	41

#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4	42




static void sdma_add_scripts(struct sdma_engine *sdma,
		const struct sdma_script_start_addrs *addr)
{
	s32 *addr_arr = (u32 *)addr;
	s32 *saddr_arr = (u32 *)sdma->script_addrs;
	int i;

	/* use the default firmware in ROM if missing external firmware */
	if (!sdma->script_number)
		sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1;

	for (i = 0; i < sdma->script_number; i++)
		if (addr_arr[i] > 0)
			saddr_arr[i] = addr_arr[i];
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer7381.11%250.00%


Nicolin Chen1718.89%250.00%


Total90100.00%4100.00%






static void sdma_load_firmware(const struct firmware *fw, void *context)
{
	struct sdma_engine *sdma = context;
	const struct sdma_firmware_header *header;
	const struct sdma_script_start_addrs *addr;
	unsigned short *ram_code;

	if (!fw) {
		dev_info(sdma->dev, "external firmware not found, using ROM firmware\n");
		/* In this case we just use the ROM firmware. */
		return;
	}

	if (fw->size < sizeof(*header))
		goto err_firmware;

	header = (struct sdma_firmware_header *)fw->data;

	if (header->magic != SDMA_FIRMWARE_MAGIC)
		goto err_firmware;
	if (header->ram_code_start + header->ram_code_size > fw->size)
		goto err_firmware;
	switch (header->version_major) {
	case 1:
		sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1;
		break;
	case 2:
		sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2;
		break;
	case 3:
		sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3;
		break;
	case 4:
		sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4;
		break;
	default:
		dev_err(sdma->dev, "unknown firmware version\n");
		goto err_firmware;
	}

	addr = (void *)header + header->script_addrs_start;
	ram_code = (void *)header + header->ram_code_start;

	clk_enable(sdma->clk_ipg);
	clk_enable(sdma->clk_ahb);
	/* download the RAM image for SDMA */
	sdma_load_script(sdma, ram_code,
			header->ram_code_size,
			addr->ram_code_start_addr);
	clk_disable(sdma->clk_ipg);
	clk_disable(sdma->clk_ahb);

	sdma_add_scripts(sdma, addr);

	dev_info(sdma->dev, "loaded firmware %d.%d\n",
			header->version_major,
			header->version_minor);

err_firmware:
	release_firmware(fw);
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer21177.57%562.50%


Nicolin Chen4115.07%112.50%


Fabio Estevam207.35%225.00%


Total272100.00%8100.00%




#define EVENT_REMAP_CELLS 3




static int sdma_event_remap(struct sdma_engine *sdma)
{
	struct device_node *np = sdma->dev->of_node;
	struct device_node *gpr_np = of_parse_phandle(np, "gpr", 0);
	struct property *event_remap;
	struct regmap *gpr;
	char propname[] = "fsl,sdma-event-remap";
	u32 reg, val, shift, num_map, i;
	int ret = 0;

	if (IS_ERR(np) || IS_ERR(gpr_np))
		goto out;

	event_remap = of_find_property(np, propname, NULL);
	num_map = event_remap ? (event_remap->length / sizeof(u32)) : 0;
	if (!num_map) {
		dev_dbg(sdma->dev, "no event needs to be remapped\n");
		goto out;
	} else if (num_map % EVENT_REMAP_CELLS) {
		dev_err(sdma->dev, "the property %s must modulo %d\n",
				propname, EVENT_REMAP_CELLS);
		ret = -EINVAL;
		goto out;
	}

	gpr = syscon_node_to_regmap(gpr_np);
	if (IS_ERR(gpr)) {
		dev_err(sdma->dev, "failed to get gpr regmap\n");
		ret = PTR_ERR(gpr);
		goto out;
	}

	for (i = 0; i < num_map; i += EVENT_REMAP_CELLS) {
		ret = of_property_read_u32_index(np, propname, i, &reg);
		if (ret) {
			dev_err(sdma->dev, "failed to read property %s index %d\n",
					propname, i);
			goto out;
		}

		ret = of_property_read_u32_index(np, propname, i + 1, &shift);
		if (ret) {
			dev_err(sdma->dev, "failed to read property %s index %d\n",
					propname, i + 1);
			goto out;
		}

		ret = of_property_read_u32_index(np, propname, i + 2, &val);
		if (ret) {
			dev_err(sdma->dev, "failed to read property %s index %d\n",
					propname, i + 2);
			goto out;
		}

		regmap_update_bits(gpr, reg, BIT(shift), val << shift);
	}

out:
	if (!IS_ERR(gpr_np))
		of_node_put(gpr_np);

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Zidan Wang36099.72%150.00%


Fabio Estevam10.28%150.00%


Total361100.00%2100.00%






static int sdma_get_firmware(struct sdma_engine *sdma,
		const char *fw_name)
{
	int ret;

	ret = request_firmware_nowait(THIS_MODULE,
			FW_ACTION_HOTPLUG, fw_name, sdma->dev,
			GFP_KERNEL, sdma, sdma_load_firmware);

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer43100.00%2100.00%


Total43100.00%2100.00%






static int sdma_init(struct sdma_engine *sdma)
{
	int i, ret;
	dma_addr_t ccb_phys;

	ret = clk_enable(sdma->clk_ipg);
	if (ret)
		return ret;
	ret = clk_enable(sdma->clk_ahb);
	if (ret)
		goto disable_clk_ipg;

	/* Be sure SDMA has not started yet */
	writel_relaxed(0, sdma->regs + SDMA_H_C0PTR);

	sdma->channel_control = dma_alloc_coherent(NULL,
			MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control) +
			sizeof(struct sdma_context_data),
			&ccb_phys, GFP_KERNEL);

	if (!sdma->channel_control) {
		ret = -ENOMEM;
		goto err_dma_alloc;
	}

	sdma->context = (void *)sdma->channel_control +
		MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control);
	sdma->context_phys = ccb_phys +
		MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control);

	/* Zero-out the CCB structures array just allocated */
	memset(sdma->channel_control, 0,
			MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control));

	/* disable all channels */
	for (i = 0; i < sdma->drvdata->num_events; i++)
		writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i));

	/* All channels have priority 0 */
	for (i = 0; i < MAX_DMA_CHANNELS; i++)
		writel_relaxed(0, sdma->regs + SDMA_CHNPRI_0 + i * 4);

	ret = sdma_request_channel(&sdma->channel[0]);
	if (ret)
		goto err_dma_alloc;

	sdma_config_ownership(&sdma->channel[0], false, true, false);

	/* Set Command Channel (Channel Zero) */
	writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR);

	/* Set bits of CONFIG register but with static context switching */
	/* FIXME: Check whether to set ACR bit depending on clock ratios */
	writel_relaxed(0, sdma->regs + SDMA_H_CONFIG);

	writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR);

	/* Initializes channel's priorities */
	sdma_set_channel_priority(&sdma->channel[0], 7);

	clk_disable(sdma->clk_ipg);
	clk_disable(sdma->clk_ahb);

	return 0;

err_dma_alloc:
	clk_disable(sdma->clk_ahb);
disable_clk_ipg:
	clk_disable(sdma->clk_ipg);
	dev_err(sdma->dev, "initialisation failed with %d\n", ret);
	return ret;
}


Contributors
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Sascha Hauer33192.20%466.67%


Fabio Estevam226.13%116.67%


Richard Zhao61.67%116.67%


Total359100.00%6100.00%






static bool sdma_filter_fn(struct dma_chan *chan, void *fn_param)
{
	struct sdma_channel *sdmac = to_sdma_chan(chan);
	struct imx_dma_data *data = fn_param;

	if (!imx_dma_is_general_purpose(chan))
		return false;

	sdmac->data = *data;
	chan->private = &sdmac->data;

	return true;
}


Contributors
PersonTokensPropCommitsCommitProp
Shawn Guo4267.74%150.00%


Nicolin Chen2032.26%150.00%


Total62100.00%2100.00%






static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec,
				   struct of_dma *ofdma)
{
	struct sdma_engine *sdma = ofdma->of_dma_data;
	dma_cap_mask_t mask = sdma->dma_device.cap_mask;
	struct imx_dma_data data;

	if (dma_spec->args_count != 3)
		return NULL;

	data.dma_request = dma_spec->args[0];
	data.peripheral_type = dma_spec->args[1];
	data.priority = dma_spec->args[2];
	/*
         * init dma_request2 to zero, which is not used by the dts.
         * For P2P, dma_request2 is init from dma_request_channel(),
         * chan->private will point to the imx_dma_data, and in
         * device_alloc_chan_resources(), imx_dma_data.dma_request2 will
         * be set to sdmac->event_id1.
         */
	data.dma_request2 = 0;

	return dma_request_channel(mask, sdma_filter_fn, &data);
}


Contributors
PersonTokensPropCommitsCommitProp
Shawn Guo9593.14%150.00%


Shengjiu Wang76.86%150.00%


Total102100.00%2100.00%






static int sdma_probe(struct platform_device *pdev)
{
	const struct of_device_id *of_id =
			of_match_device(sdma_dt_ids, &pdev->dev);
	struct device_node *np = pdev->dev.of_node;
	struct device_node *spba_bus;
	const char *fw_name;
	int ret;
	int irq;
	struct resource *iores;
	struct resource spba_res;
	struct sdma_platform_data *pdata = dev_get_platdata(&pdev->dev);
	int i;
	struct sdma_engine *sdma;
	s32 *saddr_arr;
	const struct sdma_driver_data *drvdata = NULL;

	if (of_id)
		drvdata = of_id->data;
	else if (pdev->id_entry)
		drvdata = (void *)pdev->id_entry->driver_data;

	if (!drvdata) {
		dev_err(&pdev->dev, "unable to find driver data\n");
		return -EINVAL;
	}

	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

	sdma = devm_kzalloc(&pdev->dev, sizeof(*sdma), GFP_KERNEL);
	if (!sdma)
		return -ENOMEM;

	spin_lock_init(&sdma->channel_0_lock);

	sdma->dev = &pdev->dev;
	sdma->drvdata = drvdata;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return irq;

	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	sdma->regs = devm_ioremap_resource(&pdev->dev, iores);
	if (IS_ERR(sdma->regs))
		return PTR_ERR(sdma->regs);

	sdma->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
	if (IS_ERR(sdma->clk_ipg))
		return PTR_ERR(sdma->clk_ipg);

	sdma->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
	if (IS_ERR(sdma->clk_ahb))
		return PTR_ERR(sdma->clk_ahb);

	clk_prepare(sdma->clk_ipg);
	clk_prepare(sdma->clk_ahb);

	ret = devm_request_irq(&pdev->dev, irq, sdma_int_handler, 0, "sdma",
			       sdma);
	if (ret)
		return ret;

	sdma->irq = irq;

	sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
	if (!sdma->script_addrs)
		return -ENOMEM;

	/* initially no scripts available */
	saddr_arr = (s32 *)sdma->script_addrs;
	for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++)
		saddr_arr[i] = -EINVAL;

	dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask);
	dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask);

	INIT_LIST_HEAD(&sdma->dma_device.channels);
	/* Initialize channel parameters */
	for (i = 0; i < MAX_DMA_CHANNELS; i++) {
		struct sdma_channel *sdmac = &sdma->channel[i];

		sdmac->sdma = sdma;
		spin_lock_init(&sdmac->lock);

		sdmac->chan.device = &sdma->dma_device;
		dma_cookie_init(&sdmac->chan);
		sdmac->channel = i;

		tasklet_init(&sdmac->tasklet, mxc_sdma_handle_channel_normal,
			     (unsigned long) sdmac);
		/*
                 * Add the channel to the DMAC list. Do not add channel 0 though
                 * because we need it internally in the SDMA driver. This also means
                 * that channel 0 in dmaengine counting matches sdma channel 1.
                 */
		if (i)
			list_add_tail(&sdmac->chan.device_node,
					&sdma->dma_device.channels);
	}

	ret = sdma_init(sdma);
	if (ret)
		goto err_init;

	ret = sdma_event_remap(sdma);
	if (ret)
		goto err_init;

	if (sdma->drvdata->script_addrs)
		sdma_add_scripts(sdma, sdma->drvdata->script_addrs);
	if (pdata && pdata->script_addrs)
		sdma_add_scripts(sdma, pdata->script_addrs);

	if (pdata) {
		ret = sdma_get_firmware(sdma, pdata->fw_name);
		if (ret)
			dev_warn(&pdev->dev, "failed to get firmware from platform data\n");
	} else {
		/*
                 * Because that device tree does not encode ROM script address,
                 * the RAM script in firmware is mandatory for device tree
                 * probe, otherwise it fails.
                 */
		ret = of_property_read_string(np, "fsl,sdma-ram-script-name",
					      &fw_name);
		if (ret)
			dev_warn(&pdev->dev, "failed to get firmware name\n");
		else {
			ret = sdma_get_firmware(sdma, fw_name);
			if (ret)
				dev_warn(&pdev->dev, "failed to get firmware from device tree\n");
		}
	}

	sdma->dma_device.dev = &pdev->dev;

	sdma->dma_device.device_alloc_chan_resources = sdma_alloc_chan_resources;
	sdma->dma_device.device_free_chan_resources = sdma_free_chan_resources;
	sdma->dma_device.device_tx_status = sdma_tx_status;
	sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg;
	sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic;
	sdma->dma_device.device_config = sdma_config;
	sdma->dma_device.device_terminate_all = sdma_disable_channel;
	sdma->dma_device.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
	sdma->dma_device.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
	sdma->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
	sdma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
	sdma->dma_device.device_issue_pending = sdma_issue_pending;
	sdma->dma_device.dev->dma_parms = &sdma->dma_parms;
	dma_set_max_seg_size(sdma->dma_device.dev, 65535);

	platform_set_drvdata(pdev, sdma);

	ret = dma_async_device_register(&sdma->dma_device);
	if (ret) {
		dev_err(&pdev->dev, "unable to register\n");
		goto err_init;
	}

	if (np) {
		ret = of_dma_controller_register(np, sdma_xlate, sdma);
		if (ret) {
			dev_err(&pdev->dev, "failed to register controller\n");
			goto err_register;
		}

		spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
		ret = of_address_to_resource(spba_bus, 0, &spba_res);
		if (!ret) {
			sdma->spba_start_addr = spba_res.start;
			sdma->spba_end_addr = spba_res.end;
		}
		of_node_put(spba_bus);
	}

	return 0;

err_register:
	dma_async_device_unregister(&sdma->dma_device);
err_init:
	kfree(sdma->script_addrs);
	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer61759.96%1031.25%


Shawn Guo13913.51%412.50%


Fabio Estevam12311.95%618.75%


Shengjiu Wang605.83%13.12%


Philippe Rétornaz222.14%13.12%


Huang Shijie151.46%13.12%


Zidan Wang141.36%13.12%


Maxime Ripard100.97%13.12%


Russell King80.78%13.12%


Vignesh Raman70.68%13.12%


Vinod Koul60.58%13.12%


Jingoo Han40.39%13.12%


Axel Lin20.19%13.12%


Richard Zhao10.10%13.12%


Nandor Han10.10%13.12%


Total1029100.00%32100.00%






static int sdma_remove(struct platform_device *pdev)
{
	struct sdma_engine *sdma = platform_get_drvdata(pdev);
	int i;

	devm_free_irq(&pdev->dev, sdma->irq, sdma);
	dma_async_device_unregister(&sdma->dma_device);
	kfree(sdma->script_addrs);
	/* Kill the tasklet */
	for (i = 0; i < MAX_DMA_CHANNELS; i++) {
		struct sdma_channel *sdmac = &sdma->channel[i];

		tasklet_kill(&sdmac->tasklet);
	}

	platform_set_drvdata(pdev, NULL);
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Vignesh Raman7373.00%250.00%


Vinod Koul1414.00%125.00%


Sascha Hauer1313.00%125.00%


Total100100.00%4100.00%




static struct platform_driver sdma_driver = {
	.driver		= {
		.name	= "imx-sdma",
		.of_match_table = sdma_dt_ids,
        },
	.id_table	= sdma_devtypes,
	.remove		= sdma_remove,
	.probe		= sdma_probe,
};


module_platform_driver(sdma_driver);

MODULE_AUTHOR("Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX SDMA driver");
MODULE_LICENSE("GPL");

Overall Contributors
PersonTokensPropCommitsCommitProp
Sascha Hauer560468.14%1517.05%


Shengjiu Wang4775.80%11.14%


Shawn Guo3994.85%89.09%


Zidan Wang3874.71%11.14%


Fabio Estevam3344.06%1112.50%


Richard Zhao2633.20%89.09%


Nicolin Chen1401.70%66.82%


Nandor Han1331.62%33.41%


Russell King881.07%66.82%


Vignesh Raman871.06%22.27%


Huang Shijie710.86%33.41%


Maxime Ripard700.85%11.14%


Philippe Rétornaz300.36%22.27%


Vinod Koul300.36%33.41%


Robin Gong250.30%11.14%


Michael Olbrich220.27%11.14%


Markus Pargmann130.16%11.14%


Haitao Zhang100.12%11.14%


Olof Johansson80.10%11.14%


Axel Lin50.06%22.27%


Alexandre Bounine50.06%11.14%


Jingoo Han40.05%11.14%


Dave Jiang40.05%11.14%


Peter Ujfalusi30.04%11.14%


Andy Shevchenko30.04%11.14%


Lars-Peter Clausen30.04%11.14%


Arnd Bergmann20.02%11.14%


Joe Perches10.01%11.14%


Martin Kaiser10.01%11.14%


Anatolij Gustschin10.01%11.14%


Krzysztof Kozlowski10.01%11.14%


Total8224100.00%88100.00%


Directory: drivers/dma



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