[deliverable/linux.git] / arch / arm / mach-msm / dma.c

/* linux/arch/arm/mach-msm/dma.c
 *
 * Copyright (C) 2007 Google, Inc.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that 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.
 *
 */

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/completion.h>
#include <linux/module.h>
#include <mach/dma.h>
#include <mach/msm_iomap.h>

#define MSM_DMOV_CHANNEL_COUNT 16

#define DMOV_SD0(off, ch) (MSM_DMOV_BASE + 0x0000 + (off) + ((ch) << 2))
#define DMOV_SD1(off, ch) (MSM_DMOV_BASE + 0x0400 + (off) + ((ch) << 2))
#define DMOV_SD2(off, ch) (MSM_DMOV_BASE + 0x0800 + (off) + ((ch) << 2))
#define DMOV_SD3(off, ch) (MSM_DMOV_BASE + 0x0C00 + (off) + ((ch) << 2))

#if defined(CONFIG_ARCH_MSM7X30)
#define DMOV_SD_AARM DMOV_SD2
#else
#define DMOV_SD_AARM DMOV_SD3
#endif

#define DMOV_CMD_PTR(ch)      DMOV_SD_AARM(0x000, ch)
#define DMOV_RSLT(ch)         DMOV_SD_AARM(0x040, ch)
#define DMOV_FLUSH0(ch)       DMOV_SD_AARM(0x080, ch)
#define DMOV_FLUSH1(ch)       DMOV_SD_AARM(0x0C0, ch)
#define DMOV_FLUSH2(ch)       DMOV_SD_AARM(0x100, ch)
#define DMOV_FLUSH3(ch)       DMOV_SD_AARM(0x140, ch)
#define DMOV_FLUSH4(ch)       DMOV_SD_AARM(0x180, ch)
#define DMOV_FLUSH5(ch)       DMOV_SD_AARM(0x1C0, ch)

#define DMOV_STATUS(ch)       DMOV_SD_AARM(0x200, ch)
#define DMOV_ISR              DMOV_SD_AARM(0x380, 0)

#define DMOV_CONFIG(ch)       DMOV_SD_AARM(0x300, ch)

enum {
	MSM_DMOV_PRINT_ERRORS = 1,
	MSM_DMOV_PRINT_IO = 2,
	MSM_DMOV_PRINT_FLOW = 4
};

static DEFINE_SPINLOCK(msm_dmov_lock);
static struct clk *msm_dmov_clk;
static unsigned int channel_active;
static struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];
static struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];
unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;

#define MSM_DMOV_DPRINTF(mask, format, args...) \
	do { \
		if ((mask) & msm_dmov_print_mask) \
			printk(KERN_ERR format, args); \
	} while (0)
#define PRINT_ERROR(format, args...) \
	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);
#define PRINT_IO(format, args...) \
	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);
#define PRINT_FLOW(format, args...) \
	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);

void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful)
{
	writel((graceful << 31), DMOV_FLUSH0(id));
}
EXPORT_SYMBOL_GPL(msm_dmov_stop_cmd);

void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
{
	unsigned long irq_flags;
	unsigned int status;

	spin_lock_irqsave(&msm_dmov_lock, irq_flags);
	if (!channel_active)
		clk_enable(msm_dmov_clk);
	dsb();
	status = readl(DMOV_STATUS(id));
	if (list_empty(&ready_commands[id]) &&
		(status & DMOV_STATUS_CMD_PTR_RDY)) {
#if 0
		if (list_empty(&active_commands[id])) {
			PRINT_FLOW("msm_dmov_enqueue_cmd(%d), enable interrupt\n", id);
			writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));
		}
#endif
		if (cmd->execute_func)
			cmd->execute_func(cmd);
		PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);
		list_add_tail(&cmd->list, &active_commands[id]);
		if (!channel_active)
			enable_irq(INT_ADM_AARM);
		channel_active |= 1U << id;
		writel(cmd->cmdptr, DMOV_CMD_PTR(id));
	} else {
		if (!channel_active)
			clk_disable(msm_dmov_clk);
		if (list_empty(&active_commands[id]))
			PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);

		PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status %x\n", id, status);
		list_add_tail(&cmd->list, &ready_commands[id]);
	}
	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
}
EXPORT_SYMBOL_GPL(msm_dmov_enqueue_cmd);

struct msm_dmov_exec_cmdptr_cmd {
	struct msm_dmov_cmd dmov_cmd;
	struct completion complete;
	unsigned id;
	unsigned int result;
	struct msm_dmov_errdata err;
};

static void
dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd,
			       unsigned int result,
			       struct msm_dmov_errdata *err)
{
	struct msm_dmov_exec_cmdptr_cmd *cmd = container_of(_cmd, struct msm_dmov_exec_cmdptr_cmd, dmov_cmd);
	cmd->result = result;
	if (result != 0x80000002 && err)
		memcpy(&cmd->err, err, sizeof(struct msm_dmov_errdata));

	complete(&cmd->complete);
}

int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
{
	struct msm_dmov_exec_cmdptr_cmd cmd;

	PRINT_FLOW("dmov_exec_cmdptr(%d, %x)\n", id, cmdptr);

	cmd.dmov_cmd.cmdptr = cmdptr;
	cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;
	cmd.dmov_cmd.execute_func = NULL;
	cmd.id = id;
	init_completion(&cmd.complete);

	msm_dmov_enqueue_cmd(id, &cmd.dmov_cmd);
	wait_for_completion(&cmd.complete);

	if (cmd.result != 0x80000002) {
		PRINT_ERROR("dmov_exec_cmdptr(%d): ERROR, result: %x\n", id, cmd.result);
		PRINT_ERROR("dmov_exec_cmdptr(%d):  flush: %x %x %x %x\n",
			id, cmd.err.flush[0], cmd.err.flush[1], cmd.err.flush[2], cmd.err.flush[3]);
		return -EIO;
	}
	PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);
	return 0;
}


static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
{
	unsigned int int_status, mask, id;
	unsigned long irq_flags;
	unsigned int ch_status;
	unsigned int ch_result;
	struct msm_dmov_cmd *cmd;

	spin_lock_irqsave(&msm_dmov_lock, irq_flags);

	int_status = readl(DMOV_ISR); /* read and clear interrupt */
	PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);

	while (int_status) {
		mask = int_status & -int_status;
		id = fls(mask) - 1;
		PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);
		int_status &= ~mask;
		ch_status = readl(DMOV_STATUS(id));
		if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {
			PRINT_FLOW("msm_datamover_irq_handler id %d, result not valid %x\n", id, ch_status);
			continue;
		}
		do {
			ch_result = readl(DMOV_RSLT(id));
			if (list_empty(&active_commands[id])) {
				PRINT_ERROR("msm_datamover_irq_handler id %d, got result "
					"with no active command, status %x, result %x\n",
					id, ch_status, ch_result);
				cmd = NULL;
			} else
				cmd = list_entry(active_commands[id].next, typeof(*cmd), list);
			PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);
			if (ch_result & DMOV_RSLT_DONE) {
				PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",
					id, ch_status);
				PRINT_IO("msm_datamover_irq_handler id %d, got result "
					"for %p, result %x\n", id, cmd, ch_result);
				if (cmd) {
					list_del(&cmd->list);
					dsb();
					cmd->complete_func(cmd, ch_result, NULL);
				}
			}
			if (ch_result & DMOV_RSLT_FLUSH) {
				struct msm_dmov_errdata errdata;

				errdata.flush[0] = readl(DMOV_FLUSH0(id));
				errdata.flush[1] = readl(DMOV_FLUSH1(id));
				errdata.flush[2] = readl(DMOV_FLUSH2(id));
				errdata.flush[3] = readl(DMOV_FLUSH3(id));
				errdata.flush[4] = readl(DMOV_FLUSH4(id));
				errdata.flush[5] = readl(DMOV_FLUSH5(id));
				PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
				PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
				if (cmd) {
					list_del(&cmd->list);
					dsb();
					cmd->complete_func(cmd, ch_result, &errdata);
				}
			}
			if (ch_result & DMOV_RSLT_ERROR) {
				struct msm_dmov_errdata errdata;

				errdata.flush[0] = readl(DMOV_FLUSH0(id));
				errdata.flush[1] = readl(DMOV_FLUSH1(id));
				errdata.flush[2] = readl(DMOV_FLUSH2(id));
				errdata.flush[3] = readl(DMOV_FLUSH3(id));
				errdata.flush[4] = readl(DMOV_FLUSH4(id));
				errdata.flush[5] = readl(DMOV_FLUSH5(id));

				PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
				PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
				if (cmd) {
					list_del(&cmd->list);
					dsb();
					cmd->complete_func(cmd, ch_result, &errdata);
				}
				/* this does not seem to work, once we get an error */
				/* the datamover will no longer accept commands */
				writel(0, DMOV_FLUSH0(id));
			}
			ch_status = readl(DMOV_STATUS(id));
			PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
			if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {
				cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);
				list_move_tail(&cmd->list, &active_commands[id]);
				if (cmd->execute_func)
					cmd->execute_func(cmd);
				PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
				writel(cmd->cmdptr, DMOV_CMD_PTR(id));
			}
		} while (ch_status & DMOV_STATUS_RSLT_VALID);
		if (list_empty(&active_commands[id]) && list_empty(&ready_commands[id]))
			channel_active &= ~(1U << id);
		PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
	}

	if (!channel_active) {
		disable_irq_nosync(INT_ADM_AARM);
		clk_disable(msm_dmov_clk);
	}

	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
	return IRQ_HANDLED;
}

static int __init msm_init_datamover(void)
{
	int i;
	int ret;
	struct clk *clk;

	for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
		INIT_LIST_HEAD(&ready_commands[i]);
		INIT_LIST_HEAD(&active_commands[i]);
		writel(DMOV_CONFIG_IRQ_EN | DMOV_CONFIG_FORCE_TOP_PTR_RSLT | DMOV_CONFIG_FORCE_FLUSH_RSLT, DMOV_CONFIG(i));
	}
	clk = clk_get(NULL, "adm_clk");
	if (IS_ERR(clk))
		return PTR_ERR(clk);
	clk_prepare(clk);
	msm_dmov_clk = clk;
	ret = request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
	if (ret)
		return ret;
	disable_irq(INT_ADM_AARM);
	return 0;
}
module_init(msm_init_datamover);
Commit	Line	Data
bfe645ad AH	1	/* linux/arch/arm/mach-msm/dma.c
	2	*
	3	* Copyright (C) 2007 Google, Inc.
	4	*
	5	* This software is licensed under the terms of the GNU General Public
	6	* License version 2, as published by the Free Software Foundation, and
	7	* may be copied, distributed, and modified under those terms.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	*/
	15
c5541079 AH	16	#include <linux/clk.h>
c5541079 AH	17	#include <linux/err.h>
fced80c7	18	#include <linux/io.h>
bfe645ad	19	#include <linux/interrupt.h>
6d7b7d57	20	#include <linux/completion.h>
404ed596	21	#include <linux/module.h>
a09e64fb	22	#include <mach/dma.h>
430f1eef	23	#include <mach/msm_iomap.h>
bfe645ad AH	24
	25	#define MSM_DMOV_CHANNEL_COUNT 16
	26
430f1eef SB	27	#define DMOV_SD0(off, ch) (MSM_DMOV_BASE + 0x0000 + (off) + ((ch) << 2))
	28	#define DMOV_SD1(off, ch) (MSM_DMOV_BASE + 0x0400 + (off) + ((ch) << 2))
	29	#define DMOV_SD2(off, ch) (MSM_DMOV_BASE + 0x0800 + (off) + ((ch) << 2))
	30	#define DMOV_SD3(off, ch) (MSM_DMOV_BASE + 0x0C00 + (off) + ((ch) << 2))
	31
	32	#if defined(CONFIG_ARCH_MSM7X30)
	33	#define DMOV_SD_AARM DMOV_SD2
	34	#else
	35	#define DMOV_SD_AARM DMOV_SD3
	36	#endif
	37
	38	#define DMOV_CMD_PTR(ch) DMOV_SD_AARM(0x000, ch)
	39	#define DMOV_RSLT(ch) DMOV_SD_AARM(0x040, ch)
	40	#define DMOV_FLUSH0(ch) DMOV_SD_AARM(0x080, ch)
	41	#define DMOV_FLUSH1(ch) DMOV_SD_AARM(0x0C0, ch)
	42	#define DMOV_FLUSH2(ch) DMOV_SD_AARM(0x100, ch)
	43	#define DMOV_FLUSH3(ch) DMOV_SD_AARM(0x140, ch)
	44	#define DMOV_FLUSH4(ch) DMOV_SD_AARM(0x180, ch)
	45	#define DMOV_FLUSH5(ch) DMOV_SD_AARM(0x1C0, ch)
	46
	47	#define DMOV_STATUS(ch) DMOV_SD_AARM(0x200, ch)
	48	#define DMOV_ISR DMOV_SD_AARM(0x380, 0)
	49
	50	#define DMOV_CONFIG(ch) DMOV_SD_AARM(0x300, ch)
	51
bfe645ad AH	52	enum {
	53	MSM_DMOV_PRINT_ERRORS = 1,
	54	MSM_DMOV_PRINT_IO = 2,
	55	MSM_DMOV_PRINT_FLOW = 4
	56	};
	57
	58	static DEFINE_SPINLOCK(msm_dmov_lock);
c5541079	59	static struct clk *msm_dmov_clk;
8a0f6f17	60	static unsigned int channel_active;
bfe645ad AH	61	static struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];
	62	static struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];
	63	unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
	64
	65	#define MSM_DMOV_DPRINTF(mask, format, args...) \
	66	do { \
	67	if ((mask) & msm_dmov_print_mask) \
	68	printk(KERN_ERR format, args); \
	69	} while (0)
	70	#define PRINT_ERROR(format, args...) \
	71	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);
	72	#define PRINT_IO(format, args...) \
	73	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);
	74	#define PRINT_FLOW(format, args...) \
	75	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);
	76
8a0f6f17 BS	77	void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful)
	78	{
	79	writel((graceful << 31), DMOV_FLUSH0(id));
	80	}
b25a7912	81	EXPORT_SYMBOL_GPL(msm_dmov_stop_cmd);
8a0f6f17	82
bfe645ad AH	83	void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
	84	{
	85	unsigned long irq_flags;
	86	unsigned int status;
	87
	88	spin_lock_irqsave(&msm_dmov_lock, irq_flags);
c5541079 AH	89	if (!channel_active)
c5541079 AH	90	clk_enable(msm_dmov_clk);
9f68fcdb	91	dsb();
bfe645ad AH	92	status = readl(DMOV_STATUS(id));
	93	if (list_empty(&ready_commands[id]) &&
	94	(status & DMOV_STATUS_CMD_PTR_RDY)) {
	95	#if 0
	96	if (list_empty(&active_commands[id])) {
	97	PRINT_FLOW("msm_dmov_enqueue_cmd(%d), enable interrupt\n", id);
	98	writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));
	99	}
	100	#endif
5b00f40f SM	101	if (cmd->execute_func)
5b00f40f SM	102	cmd->execute_func(cmd);
bfe645ad AH	103	PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);
bfe645ad AH	104	list_add_tail(&cmd->list, &active_commands[id]);
8a0f6f17 BS	105	if (!channel_active)
	106	enable_irq(INT_ADM_AARM);
	107	channel_active \|= 1U << id;
bfe645ad AH	108	writel(cmd->cmdptr, DMOV_CMD_PTR(id));
bfe645ad AH	109	} else {
c5541079 AH	110	if (!channel_active)
c5541079 AH	111	clk_disable(msm_dmov_clk);
bfe645ad AH	112	if (list_empty(&active_commands[id]))
	113	PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);
	114
	115	PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status %x\n", id, status);
	116	list_add_tail(&cmd->list, &ready_commands[id]);
	117	}
	118	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
	119	}
b25a7912	120	EXPORT_SYMBOL_GPL(msm_dmov_enqueue_cmd);
bfe645ad AH	121
	122	struct msm_dmov_exec_cmdptr_cmd {
	123	struct msm_dmov_cmd dmov_cmd;
	124	struct completion complete;
	125	unsigned id;
	126	unsigned int result;
8a0f6f17	127	struct msm_dmov_errdata err;
bfe645ad AH	128	};
bfe645ad AH	129
8a0f6f17 BS	130	static void
	131	dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd,
	132	unsigned int result,
	133	struct msm_dmov_errdata *err)
bfe645ad AH	134	{
	135	struct msm_dmov_exec_cmdptr_cmd *cmd = container_of(_cmd, struct msm_dmov_exec_cmdptr_cmd, dmov_cmd);
	136	cmd->result = result;
8a0f6f17 BS	137	if (result != 0x80000002 && err)
	138	memcpy(&cmd->err, err, sizeof(struct msm_dmov_errdata));
	139
bfe645ad AH	140	complete(&cmd->complete);
	141	}
	142
	143	int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
	144	{
	145	struct msm_dmov_exec_cmdptr_cmd cmd;
	146
	147	PRINT_FLOW("dmov_exec_cmdptr(%d, %x)\n", id, cmdptr);
	148
	149	cmd.dmov_cmd.cmdptr = cmdptr;
	150	cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;
5b00f40f	151	cmd.dmov_cmd.execute_func = NULL;
bfe645ad AH	152	cmd.id = id;
	153	init_completion(&cmd.complete);
	154
	155	msm_dmov_enqueue_cmd(id, &cmd.dmov_cmd);
	156	wait_for_completion(&cmd.complete);
	157
	158	if (cmd.result != 0x80000002) {
	159	PRINT_ERROR("dmov_exec_cmdptr(%d): ERROR, result: %x\n", id, cmd.result);
	160	PRINT_ERROR("dmov_exec_cmdptr(%d): flush: %x %x %x %x\n",
8a0f6f17	161	id, cmd.err.flush[0], cmd.err.flush[1], cmd.err.flush[2], cmd.err.flush[3]);
bfe645ad AH	162	return -EIO;
	163	}
	164	PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);
	165	return 0;
	166	}
	167
	168
	169	static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
	170	{
	171	unsigned int int_status, mask, id;
	172	unsigned long irq_flags;
	173	unsigned int ch_status;
	174	unsigned int ch_result;
	175	struct msm_dmov_cmd *cmd;
	176
	177	spin_lock_irqsave(&msm_dmov_lock, irq_flags);
	178
	179	int_status = readl(DMOV_ISR); /* read and clear interrupt */
	180	PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);
	181
	182	while (int_status) {
	183	mask = int_status & -int_status;
	184	id = fls(mask) - 1;
	185	PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);
	186	int_status &= ~mask;
	187	ch_status = readl(DMOV_STATUS(id));
	188	if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {
	189	PRINT_FLOW("msm_datamover_irq_handler id %d, result not valid %x\n", id, ch_status);
	190	continue;
	191	}
	192	do {
	193	ch_result = readl(DMOV_RSLT(id));
	194	if (list_empty(&active_commands[id])) {
	195	PRINT_ERROR("msm_datamover_irq_handler id %d, got result "
	196	"with no active command, status %x, result %x\n",
	197	id, ch_status, ch_result);
	198	cmd = NULL;
	199	} else
	200	cmd = list_entry(active_commands[id].next, typeof(*cmd), list);
	201	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);
	202	if (ch_result & DMOV_RSLT_DONE) {
	203	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",
	204	id, ch_status);
	205	PRINT_IO("msm_datamover_irq_handler id %d, got result "
	206	"for %p, result %x\n", id, cmd, ch_result);
	207	if (cmd) {
	208	list_del(&cmd->list);
9f68fcdb	209	dsb();
8a0f6f17	210	cmd->complete_func(cmd, ch_result, NULL);
bfe645ad AH	211	}
	212	}
	213	if (ch_result & DMOV_RSLT_FLUSH) {
8a0f6f17 BS	214	struct msm_dmov_errdata errdata;
	215
	216	errdata.flush[0] = readl(DMOV_FLUSH0(id));
	217	errdata.flush[1] = readl(DMOV_FLUSH1(id));
	218	errdata.flush[2] = readl(DMOV_FLUSH2(id));
	219	errdata.flush[3] = readl(DMOV_FLUSH3(id));
	220	errdata.flush[4] = readl(DMOV_FLUSH4(id));
	221	errdata.flush[5] = readl(DMOV_FLUSH5(id));
bfe645ad	222	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
8a0f6f17	223	PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
bfe645ad AH	224	if (cmd) {
bfe645ad AH	225	list_del(&cmd->list);
9f68fcdb	226	dsb();
8a0f6f17	227	cmd->complete_func(cmd, ch_result, &errdata);
bfe645ad AH	228	}
	229	}
	230	if (ch_result & DMOV_RSLT_ERROR) {
8a0f6f17 BS	231	struct msm_dmov_errdata errdata;
	232
	233	errdata.flush[0] = readl(DMOV_FLUSH0(id));
	234	errdata.flush[1] = readl(DMOV_FLUSH1(id));
	235	errdata.flush[2] = readl(DMOV_FLUSH2(id));
	236	errdata.flush[3] = readl(DMOV_FLUSH3(id));
	237	errdata.flush[4] = readl(DMOV_FLUSH4(id));
	238	errdata.flush[5] = readl(DMOV_FLUSH5(id));
	239
bfe645ad	240	PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
8a0f6f17	241	PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
bfe645ad AH	242	if (cmd) {
bfe645ad AH	243	list_del(&cmd->list);
9f68fcdb	244	dsb();
8a0f6f17	245	cmd->complete_func(cmd, ch_result, &errdata);
bfe645ad AH	246	}
	247	/* this does not seem to work, once we get an error */
	248	/* the datamover will no longer accept commands */
	249	writel(0, DMOV_FLUSH0(id));
	250	}
	251	ch_status = readl(DMOV_STATUS(id));
	252	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
	253	if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {
	254	cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);
6eebf2de	255	list_move_tail(&cmd->list, &active_commands[id]);
5b00f40f SM	256	if (cmd->execute_func)
5b00f40f SM	257	cmd->execute_func(cmd);
bfe645ad AH	258	PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
	259	writel(cmd->cmdptr, DMOV_CMD_PTR(id));
	260	}
	261	} while (ch_status & DMOV_STATUS_RSLT_VALID);
8a0f6f17 BS	262	if (list_empty(&active_commands[id]) && list_empty(&ready_commands[id]))
8a0f6f17 BS	263	channel_active &= ~(1U << id);
bfe645ad AH	264	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
bfe645ad AH	265	}
8a0f6f17	266
c5541079	267	if (!channel_active) {
a6407dd7	268	disable_irq_nosync(INT_ADM_AARM);
c5541079 AH	269	clk_disable(msm_dmov_clk);
c5541079 AH	270	}
8a0f6f17	271
bfe645ad AH	272	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
	273	return IRQ_HANDLED;
	274	}
	275
	276	static int __init msm_init_datamover(void)
	277	{
	278	int i;
8a0f6f17	279	int ret;
c5541079 AH	280	struct clk *clk;
c5541079 AH	281
bfe645ad AH	282	for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
	283	INIT_LIST_HEAD(&ready_commands[i]);
	284	INIT_LIST_HEAD(&active_commands[i]);
	285	writel(DMOV_CONFIG_IRQ_EN \| DMOV_CONFIG_FORCE_TOP_PTR_RSLT \| DMOV_CONFIG_FORCE_FLUSH_RSLT, DMOV_CONFIG(i));
	286	}
c5541079 AH	287	clk = clk_get(NULL, "adm_clk");
	288	if (IS_ERR(clk))
	289	return PTR_ERR(clk);
2dfd9c1f	290	clk_prepare(clk);
c5541079	291	msm_dmov_clk = clk;
8a0f6f17 BS	292	ret = request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
	293	if (ret)
	294	return ret;
	295	disable_irq(INT_ADM_AARM);
	296	return 0;
bfe645ad	297	}
2dfd9c1f	298	module_init(msm_init_datamover);