[linux-2.6-block.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 <mach/dma.h>

#define MSM_DMOV_CHANNEL_COUNT 16

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));
}

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
		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);
}

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.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_del(&cmd->list);
				list_add_tail(&cmd->list, &active_commands[id]);
				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);
	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;
}

arch_initcall(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>
a09e64fb	20	#include <mach/dma.h>
bfe645ad AH	21
	22	#define MSM_DMOV_CHANNEL_COUNT 16
	23
	24	enum {
	25	MSM_DMOV_PRINT_ERRORS = 1,
	26	MSM_DMOV_PRINT_IO = 2,
	27	MSM_DMOV_PRINT_FLOW = 4
	28	};
	29
	30	static DEFINE_SPINLOCK(msm_dmov_lock);
c5541079	31	static struct clk *msm_dmov_clk;
8a0f6f17	32	static unsigned int channel_active;
bfe645ad AH	33	static struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];
	34	static struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];
	35	unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;
	36
	37	#define MSM_DMOV_DPRINTF(mask, format, args...) \
	38	do { \
	39	if ((mask) & msm_dmov_print_mask) \
	40	printk(KERN_ERR format, args); \
	41	} while (0)
	42	#define PRINT_ERROR(format, args...) \
	43	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);
	44	#define PRINT_IO(format, args...) \
	45	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);
	46	#define PRINT_FLOW(format, args...) \
	47	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);
	48
8a0f6f17 BS	49	void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful)
	50	{
	51	writel((graceful << 31), DMOV_FLUSH0(id));
	52	}
	53
bfe645ad AH	54	void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)
	55	{
	56	unsigned long irq_flags;
	57	unsigned int status;
	58
	59	spin_lock_irqsave(&msm_dmov_lock, irq_flags);
c5541079 AH	60	if (!channel_active)
c5541079 AH	61	clk_enable(msm_dmov_clk);
9f68fcdb	62	dsb();
bfe645ad AH	63	status = readl(DMOV_STATUS(id));
	64	if (list_empty(&ready_commands[id]) &&
	65	(status & DMOV_STATUS_CMD_PTR_RDY)) {
	66	#if 0
	67	if (list_empty(&active_commands[id])) {
	68	PRINT_FLOW("msm_dmov_enqueue_cmd(%d), enable interrupt\n", id);
	69	writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));
	70	}
	71	#endif
	72	PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);
	73	list_add_tail(&cmd->list, &active_commands[id]);
8a0f6f17 BS	74	if (!channel_active)
	75	enable_irq(INT_ADM_AARM);
	76	channel_active \|= 1U << id;
bfe645ad AH	77	writel(cmd->cmdptr, DMOV_CMD_PTR(id));
bfe645ad AH	78	} else {
c5541079 AH	79	if (!channel_active)
c5541079 AH	80	clk_disable(msm_dmov_clk);
bfe645ad AH	81	if (list_empty(&active_commands[id]))
	82	PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);
	83
	84	PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status %x\n", id, status);
	85	list_add_tail(&cmd->list, &ready_commands[id]);
	86	}
	87	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
	88	}
	89
	90	struct msm_dmov_exec_cmdptr_cmd {
	91	struct msm_dmov_cmd dmov_cmd;
	92	struct completion complete;
	93	unsigned id;
	94	unsigned int result;
8a0f6f17	95	struct msm_dmov_errdata err;
bfe645ad AH	96	};
bfe645ad AH	97
8a0f6f17 BS	98	static void
	99	dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd,
	100	unsigned int result,
	101	struct msm_dmov_errdata *err)
bfe645ad AH	102	{
	103	struct msm_dmov_exec_cmdptr_cmd *cmd = container_of(_cmd, struct msm_dmov_exec_cmdptr_cmd, dmov_cmd);
	104	cmd->result = result;
8a0f6f17 BS	105	if (result != 0x80000002 && err)
	106	memcpy(&cmd->err, err, sizeof(struct msm_dmov_errdata));
	107
bfe645ad AH	108	complete(&cmd->complete);
	109	}
	110
	111	int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)
	112	{
	113	struct msm_dmov_exec_cmdptr_cmd cmd;
	114
	115	PRINT_FLOW("dmov_exec_cmdptr(%d, %x)\n", id, cmdptr);
	116
	117	cmd.dmov_cmd.cmdptr = cmdptr;
	118	cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;
	119	cmd.id = id;
	120	init_completion(&cmd.complete);
	121
	122	msm_dmov_enqueue_cmd(id, &cmd.dmov_cmd);
	123	wait_for_completion(&cmd.complete);
	124
	125	if (cmd.result != 0x80000002) {
	126	PRINT_ERROR("dmov_exec_cmdptr(%d): ERROR, result: %x\n", id, cmd.result);
	127	PRINT_ERROR("dmov_exec_cmdptr(%d): flush: %x %x %x %x\n",
8a0f6f17	128	id, cmd.err.flush[0], cmd.err.flush[1], cmd.err.flush[2], cmd.err.flush[3]);
bfe645ad AH	129	return -EIO;
	130	}
	131	PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);
	132	return 0;
	133	}
	134
	135
	136	static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
	137	{
	138	unsigned int int_status, mask, id;
	139	unsigned long irq_flags;
	140	unsigned int ch_status;
	141	unsigned int ch_result;
	142	struct msm_dmov_cmd *cmd;
	143
	144	spin_lock_irqsave(&msm_dmov_lock, irq_flags);
	145
	146	int_status = readl(DMOV_ISR); /* read and clear interrupt */
	147	PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);
	148
	149	while (int_status) {
	150	mask = int_status & -int_status;
	151	id = fls(mask) - 1;
	152	PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);
	153	int_status &= ~mask;
	154	ch_status = readl(DMOV_STATUS(id));
	155	if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {
	156	PRINT_FLOW("msm_datamover_irq_handler id %d, result not valid %x\n", id, ch_status);
	157	continue;
	158	}
	159	do {
	160	ch_result = readl(DMOV_RSLT(id));
	161	if (list_empty(&active_commands[id])) {
	162	PRINT_ERROR("msm_datamover_irq_handler id %d, got result "
	163	"with no active command, status %x, result %x\n",
	164	id, ch_status, ch_result);
	165	cmd = NULL;
	166	} else
	167	cmd = list_entry(active_commands[id].next, typeof(*cmd), list);
	168	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);
	169	if (ch_result & DMOV_RSLT_DONE) {
	170	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",
	171	id, ch_status);
	172	PRINT_IO("msm_datamover_irq_handler id %d, got result "
	173	"for %p, result %x\n", id, cmd, ch_result);
	174	if (cmd) {
	175	list_del(&cmd->list);
9f68fcdb	176	dsb();
8a0f6f17	177	cmd->complete_func(cmd, ch_result, NULL);
bfe645ad AH	178	}
	179	}
	180	if (ch_result & DMOV_RSLT_FLUSH) {
8a0f6f17 BS	181	struct msm_dmov_errdata errdata;
	182
	183	errdata.flush[0] = readl(DMOV_FLUSH0(id));
	184	errdata.flush[1] = readl(DMOV_FLUSH1(id));
	185	errdata.flush[2] = readl(DMOV_FLUSH2(id));
	186	errdata.flush[3] = readl(DMOV_FLUSH3(id));
	187	errdata.flush[4] = readl(DMOV_FLUSH4(id));
	188	errdata.flush[5] = readl(DMOV_FLUSH5(id));
bfe645ad	189	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
8a0f6f17	190	PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
bfe645ad AH	191	if (cmd) {
bfe645ad AH	192	list_del(&cmd->list);
9f68fcdb	193	dsb();
8a0f6f17	194	cmd->complete_func(cmd, ch_result, &errdata);
bfe645ad AH	195	}
	196	}
	197	if (ch_result & DMOV_RSLT_ERROR) {
8a0f6f17 BS	198	struct msm_dmov_errdata errdata;
	199
	200	errdata.flush[0] = readl(DMOV_FLUSH0(id));
	201	errdata.flush[1] = readl(DMOV_FLUSH1(id));
	202	errdata.flush[2] = readl(DMOV_FLUSH2(id));
	203	errdata.flush[3] = readl(DMOV_FLUSH3(id));
	204	errdata.flush[4] = readl(DMOV_FLUSH4(id));
	205	errdata.flush[5] = readl(DMOV_FLUSH5(id));
	206
bfe645ad	207	PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
8a0f6f17	208	PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, errdata.flush[0]);
bfe645ad AH	209	if (cmd) {
bfe645ad AH	210	list_del(&cmd->list);
9f68fcdb	211	dsb();
8a0f6f17	212	cmd->complete_func(cmd, ch_result, &errdata);
bfe645ad AH	213	}
	214	/* this does not seem to work, once we get an error */
	215	/* the datamover will no longer accept commands */
	216	writel(0, DMOV_FLUSH0(id));
	217	}
	218	ch_status = readl(DMOV_STATUS(id));
	219	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
	220	if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {
	221	cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);
	222	list_del(&cmd->list);
	223	list_add_tail(&cmd->list, &active_commands[id]);
	224	PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
	225	writel(cmd->cmdptr, DMOV_CMD_PTR(id));
	226	}
	227	} while (ch_status & DMOV_STATUS_RSLT_VALID);
8a0f6f17 BS	228	if (list_empty(&active_commands[id]) && list_empty(&ready_commands[id]))
8a0f6f17 BS	229	channel_active &= ~(1U << id);
bfe645ad AH	230	PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
bfe645ad AH	231	}
8a0f6f17	232
c5541079	233	if (!channel_active) {
a6407dd7	234	disable_irq_nosync(INT_ADM_AARM);
c5541079 AH	235	clk_disable(msm_dmov_clk);
c5541079 AH	236	}
8a0f6f17	237
bfe645ad AH	238	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);
	239	return IRQ_HANDLED;
	240	}
	241
	242	static int __init msm_init_datamover(void)
	243	{
	244	int i;
8a0f6f17	245	int ret;
c5541079 AH	246	struct clk *clk;
c5541079 AH	247
bfe645ad AH	248	for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {
	249	INIT_LIST_HEAD(&ready_commands[i]);
	250	INIT_LIST_HEAD(&active_commands[i]);
	251	writel(DMOV_CONFIG_IRQ_EN \| DMOV_CONFIG_FORCE_TOP_PTR_RSLT \| DMOV_CONFIG_FORCE_FLUSH_RSLT, DMOV_CONFIG(i));
	252	}
c5541079 AH	253	clk = clk_get(NULL, "adm_clk");
	254	if (IS_ERR(clk))
	255	return PTR_ERR(clk);
	256	msm_dmov_clk = clk;
8a0f6f17 BS	257	ret = request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);
	258	if (ret)
	259	return ret;
	260	disable_irq(INT_ADM_AARM);
	261	return 0;
bfe645ad AH	262	}
	263
	264	arch_initcall(msm_init_datamover);
	265