DMA: PL330: Merge PL330 driver into drivers/dma/

Currently there were two part of DMAC PL330 driver for
support old styled s3c-pl330 which has been merged into
drivers/dma/pl330.c driver. Actually, there is no reason
to separate them now.

Basically this patch merges arch/arm/common/pl330.c into
drivers/dma/pl330.c driver and removes useless exported
symbol, externed function and so on.

The newer pl330 driver tested on SMDKV310 and SMDK4212 boards

Cc: Jassi Brar <jassisinghbrar@gmail.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

3 files changed, 0 insertions, 1963 deletions

diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index 81a933eb0903..a43c758ff0da 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -24,9 +24,6 @@ config ARM_VIC_NR
 config ICST
 	bool
 
-config PL330
-	bool
-
 config SA1111
 	bool
 	select DMABOUNCE if !ARCH_PXA
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 6ea9b6f3607a..107d6d97c6e1 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -5,7 +5,6 @@
 obj-$(CONFIG_ARM_GIC)		+= gic.o
 obj-$(CONFIG_ARM_VIC)		+= vic.o
 obj-$(CONFIG_ICST)		+= icst.o
-obj-$(CONFIG_PL330)		+= pl330.o
 obj-$(CONFIG_SA1111)		+= sa1111.o
 obj-$(CONFIG_PCI_HOST_VIA82C505) += via82c505.o
 obj-$(CONFIG_DMABOUNCE)		+= dmabounce.o
diff --git a/arch/arm/common/pl330.c b/arch/arm/common/pl330.c
deleted file mode 100644
index d8e44a43047c..000000000000
--- a/arch/arm/common/pl330.c
+++ /dev/null
@@ -1,1959 +0,0 @@
-/* linux/arch/arm/common/pl330.c
- *
- * Copyright (C) 2010 Samsung Electronics Co Ltd.
- *	Jaswinder Singh <jassi.brar@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-
-#include <asm/hardware/pl330.h>
-
-/* Register and Bit field Definitions */
-#define DS		0x0
-#define DS_ST_STOP	0x0
-#define DS_ST_EXEC	0x1
-#define DS_ST_CMISS	0x2
-#define DS_ST_UPDTPC	0x3
-#define DS_ST_WFE	0x4
-#define DS_ST_ATBRR	0x5
-#define DS_ST_QBUSY	0x6
-#define DS_ST_WFP	0x7
-#define DS_ST_KILL	0x8
-#define DS_ST_CMPLT	0x9
-#define DS_ST_FLTCMP	0xe
-#define DS_ST_FAULT	0xf
-
-#define DPC		0x4
-#define INTEN		0x20
-#define ES		0x24
-#define INTSTATUS	0x28
-#define INTCLR		0x2c
-#define FSM		0x30
-#define FSC		0x34
-#define FTM		0x38
-
-#define _FTC		0x40
-#define FTC(n)		(_FTC + (n)*0x4)
-
-#define _CS		0x100
-#define CS(n)		(_CS + (n)*0x8)
-#define CS_CNS		(1 << 21)
-
-#define _CPC		0x104
-#define CPC(n)		(_CPC + (n)*0x8)
-
-#define _SA		0x400
-#define SA(n)		(_SA + (n)*0x20)
-
-#define _DA		0x404
-#define DA(n)		(_DA + (n)*0x20)
-
-#define _CC		0x408
-#define CC(n)		(_CC + (n)*0x20)
-
-#define CC_SRCINC	(1 << 0)
-#define CC_DSTINC	(1 << 14)
-#define CC_SRCPRI	(1 << 8)
-#define CC_DSTPRI	(1 << 22)
-#define CC_SRCNS	(1 << 9)
-#define CC_DSTNS	(1 << 23)
-#define CC_SRCIA	(1 << 10)
-#define CC_DSTIA	(1 << 24)
-#define CC_SRCBRSTLEN_SHFT	4
-#define CC_DSTBRSTLEN_SHFT	18
-#define CC_SRCBRSTSIZE_SHFT	1
-#define CC_DSTBRSTSIZE_SHFT	15
-#define CC_SRCCCTRL_SHFT	11
-#define CC_SRCCCTRL_MASK	0x7
-#define CC_DSTCCTRL_SHFT	25
-#define CC_DRCCCTRL_MASK	0x7
-#define CC_SWAP_SHFT	28
-
-#define _LC0		0x40c
-#define LC0(n)		(_LC0 + (n)*0x20)
-
-#define _LC1		0x410
-#define LC1(n)		(_LC1 + (n)*0x20)
-
-#define DBGSTATUS	0xd00
-#define DBG_BUSY	(1 << 0)
-
-#define DBGCMD		0xd04
-#define DBGINST0	0xd08
-#define DBGINST1	0xd0c
-
-#define CR0		0xe00
-#define CR1		0xe04
-#define CR2		0xe08
-#define CR3		0xe0c
-#define CR4		0xe10
-#define CRD		0xe14
-
-#define PERIPH_ID	0xfe0
-#define PCELL_ID	0xff0
-
-#define CR0_PERIPH_REQ_SET	(1 << 0)
-#define CR0_BOOT_EN_SET		(1 << 1)
-#define CR0_BOOT_MAN_NS		(1 << 2)
-#define CR0_NUM_CHANS_SHIFT	4
-#define CR0_NUM_CHANS_MASK	0x7
-#define CR0_NUM_PERIPH_SHIFT	12
-#define CR0_NUM_PERIPH_MASK	0x1f
-#define CR0_NUM_EVENTS_SHIFT	17
-#define CR0_NUM_EVENTS_MASK	0x1f
-
-#define CR1_ICACHE_LEN_SHIFT	0
-#define CR1_ICACHE_LEN_MASK	0x7
-#define CR1_NUM_ICACHELINES_SHIFT	4
-#define CR1_NUM_ICACHELINES_MASK	0xf
-
-#define CRD_DATA_WIDTH_SHIFT	0
-#define CRD_DATA_WIDTH_MASK	0x7
-#define CRD_WR_CAP_SHIFT	4
-#define CRD_WR_CAP_MASK		0x7
-#define CRD_WR_Q_DEP_SHIFT	8
-#define CRD_WR_Q_DEP_MASK	0xf
-#define CRD_RD_CAP_SHIFT	12
-#define CRD_RD_CAP_MASK		0x7
-#define CRD_RD_Q_DEP_SHIFT	16
-#define CRD_RD_Q_DEP_MASK	0xf
-#define CRD_DATA_BUFF_SHIFT	20
-#define CRD_DATA_BUFF_MASK	0x3ff
-
-#define	PART		0x330
-#define DESIGNER	0x41
-#define REVISION	0x0
-#define INTEG_CFG	0x0
-#define PERIPH_ID_VAL	((PART << 0) | (DESIGNER << 12))
-
-#define PCELL_ID_VAL	0xb105f00d
-
-#define PL330_STATE_STOPPED		(1 << 0)
-#define PL330_STATE_EXECUTING		(1 << 1)
-#define PL330_STATE_WFE			(1 << 2)
-#define PL330_STATE_FAULTING		(1 << 3)
-#define PL330_STATE_COMPLETING		(1 << 4)
-#define PL330_STATE_WFP			(1 << 5)
-#define PL330_STATE_KILLING		(1 << 6)
-#define PL330_STATE_FAULT_COMPLETING	(1 << 7)
-#define PL330_STATE_CACHEMISS		(1 << 8)
-#define PL330_STATE_UPDTPC		(1 << 9)
-#define PL330_STATE_ATBARRIER		(1 << 10)
-#define PL330_STATE_QUEUEBUSY		(1 << 11)
-#define PL330_STATE_INVALID		(1 << 15)
-
-#define PL330_STABLE_STATES (PL330_STATE_STOPPED | PL330_STATE_EXECUTING \
-				| PL330_STATE_WFE | PL330_STATE_FAULTING)
-
-#define CMD_DMAADDH	0x54
-#define CMD_DMAEND	0x00
-#define CMD_DMAFLUSHP	0x35
-#define CMD_DMAGO	0xa0
-#define CMD_DMALD	0x04
-#define CMD_DMALDP	0x25
-#define CMD_DMALP	0x20
-#define CMD_DMALPEND	0x28
-#define CMD_DMAKILL	0x01
-#define CMD_DMAMOV	0xbc
-#define CMD_DMANOP	0x18
-#define CMD_DMARMB	0x12
-#define CMD_DMASEV	0x34
-#define CMD_DMAST	0x08
-#define CMD_DMASTP	0x29
-#define CMD_DMASTZ	0x0c
-#define CMD_DMAWFE	0x36
-#define CMD_DMAWFP	0x30
-#define CMD_DMAWMB	0x13
-
-#define SZ_DMAADDH	3
-#define SZ_DMAEND	1
-#define SZ_DMAFLUSHP	2
-#define SZ_DMALD	1
-#define SZ_DMALDP	2
-#define SZ_DMALP	2
-#define SZ_DMALPEND	2
-#define SZ_DMAKILL	1
-#define SZ_DMAMOV	6
-#define SZ_DMANOP	1
-#define SZ_DMARMB	1
-#define SZ_DMASEV	2
-#define SZ_DMAST	1
-#define SZ_DMASTP	2
-#define SZ_DMASTZ	1
-#define SZ_DMAWFE	2
-#define SZ_DMAWFP	2
-#define SZ_DMAWMB	1
-#define SZ_DMAGO	6
-
-#define BRST_LEN(ccr)	((((ccr) >> CC_SRCBRSTLEN_SHFT) & 0xf) + 1)
-#define BRST_SIZE(ccr)	(1 << (((ccr) >> CC_SRCBRSTSIZE_SHFT) & 0x7))
-
-#define BYTE_TO_BURST(b, ccr)  ((b) / BRST_SIZE(ccr) / BRST_LEN(ccr))
-#define BURST_TO_BYTE(c, ccr)  ((c) * BRST_SIZE(ccr) * BRST_LEN(ccr))
-
-/*
- * With 256 bytes, we can do more than 2.5MB and 5MB xfers per req
- * at 1byte/burst for P<->M and M<->M respectively.
- * For typical scenario, at 1word/burst, 10MB and 20MB xfers per req
- * should be enough for P<->M and M<->M respectively.
- */
-#define MCODE_BUFF_PER_REQ	256
-
-/* If the _pl330_req is available to the client */
-#define IS_FREE(req)	(*((u8 *)((req)->mc_cpu)) == CMD_DMAEND)
-
-/* Use this _only_ to wait on transient states */
-#define UNTIL(t, s)	while (!(_state(t) & (s))) cpu_relax();
-
-#ifdef PL330_DEBUG_MCGEN
-static unsigned cmd_line;
-#define PL330_DBGCMD_DUMP(off, x...)	do { \
-						printk("%x:", cmd_line); \
-						printk(x); \
-						cmd_line += off; \
-					} while (0)
-#define PL330_DBGMC_START(addr)		(cmd_line = addr)
-#else
-#define PL330_DBGCMD_DUMP(off, x...)	do {} while (0)
-#define PL330_DBGMC_START(addr)		do {} while (0)
-#endif
-
-struct _xfer_spec {
-	u32 ccr;
-	struct pl330_req *r;
-	struct pl330_xfer *x;
-};
-
-enum dmamov_dst {
-	SAR = 0,
-	CCR,
-	DAR,
-};
-
-enum pl330_dst {
-	SRC = 0,
-	DST,
-};
-
-enum pl330_cond {
-	SINGLE,
-	BURST,
-	ALWAYS,
-};
-
-struct _pl330_req {
-	u32 mc_bus;
-	void *mc_cpu;
-	/* Number of bytes taken to setup MC for the req */
-	u32 mc_len;
-	struct pl330_req *r;
-	/* Hook to attach to DMAC's list of reqs with due callback */
-	struct list_head rqd;
-};
-
-/* ToBeDone for tasklet */
-struct _pl330_tbd {
-	bool reset_dmac;
-	bool reset_mngr;
-	u8 reset_chan;
-};
-
-/* A DMAC Thread */
-struct pl330_thread {
-	u8 id;
-	int ev;
-	/* If the channel is not yet acquired by any client */
-	bool free;
-	/* Parent DMAC */
-	struct pl330_dmac *dmac;
-	/* Only two at a time */
-	struct _pl330_req req[2];
-	/* Index of the last enqueued request */
-	unsigned lstenq;
-	/* Index of the last submitted request or -1 if the DMA is stopped */
-	int req_running;
-};
-
-enum pl330_dmac_state {
-	UNINIT,
-	INIT,
-	DYING,
-};
-
-/* A DMAC */
-struct pl330_dmac {
-	spinlock_t		lock;
-	/* Holds list of reqs with due callbacks */
-	struct list_head	req_done;
-	/* Pointer to platform specific stuff */
-	struct pl330_info	*pinfo;
-	/* Maximum possible events/irqs */
-	int			events[32];
-	/* BUS address of MicroCode buffer */
-	u32			mcode_bus;
-	/* CPU address of MicroCode buffer */
-	void			*mcode_cpu;
-	/* List of all Channel threads */
-	struct pl330_thread	*channels;
-	/* Pointer to the MANAGER thread */
-	struct pl330_thread	*manager;
-	/* To handle bad news in interrupt */
-	struct tasklet_struct	tasks;
-	struct _pl330_tbd	dmac_tbd;
-	/* State of DMAC operation */
-	enum pl330_dmac_state	state;
-};
-
-static inline void _callback(struct pl330_req *r, enum pl330_op_err err)
-{
-	if (r && r->xfer_cb)
-		r->xfer_cb(r->token, err);
-}
-
-static inline bool _queue_empty(struct pl330_thread *thrd)
-{
-	return (IS_FREE(&thrd->req[0]) && IS_FREE(&thrd->req[1]))
-		? true : false;
-}
-
-static inline bool _queue_full(struct pl330_thread *thrd)
-{
-	return (IS_FREE(&thrd->req[0]) || IS_FREE(&thrd->req[1]))
-		? false : true;
-}
-
-static inline bool is_manager(struct pl330_thread *thrd)
-{
-	struct pl330_dmac *pl330 = thrd->dmac;
-
-	/* MANAGER is indexed at the end */
-	if (thrd->id == pl330->pinfo->pcfg.num_chan)
-		return true;
-	else
-		return false;
-}
-
-/* If manager of the thread is in Non-Secure mode */
-static inline bool _manager_ns(struct pl330_thread *thrd)
-{
-	struct pl330_dmac *pl330 = thrd->dmac;
-
-	return (pl330->pinfo->pcfg.mode & DMAC_MODE_NS) ? true : false;
-}
-
-static inline u32 get_id(struct pl330_info *pi, u32 off)
-{
-	void __iomem *regs = pi->base;
-	u32 id = 0;
-
-	id |= (readb(regs + off + 0x0) << 0);
-	id |= (readb(regs + off + 0x4) << 8);
-	id |= (readb(regs + off + 0x8) << 16);
-	id |= (readb(regs + off + 0xc) << 24);
-
-	return id;
-}
-
-static inline u32 _emit_ADDH(unsigned dry_run, u8 buf[],
-		enum pl330_dst da, u16 val)
-{
-	if (dry_run)
-		return SZ_DMAADDH;
-
-	buf[0] = CMD_DMAADDH;
-	buf[0] |= (da << 1);
-	*((u16 *)&buf[1]) = val;
-
-	PL330_DBGCMD_DUMP(SZ_DMAADDH, "\tDMAADDH %s %u\n",
-		da == 1 ? "DA" : "SA", val);
-
-	return SZ_DMAADDH;
-}
-
-static inline u32 _emit_END(unsigned dry_run, u8 buf[])
-{
-	if (dry_run)
-		return SZ_DMAEND;
-
-	buf[0] = CMD_DMAEND;
-
-	PL330_DBGCMD_DUMP(SZ_DMAEND, "\tDMAEND\n");
-
-	return SZ_DMAEND;
-}
-
-static inline u32 _emit_FLUSHP(unsigned dry_run, u8 buf[], u8 peri)
-{
-	if (dry_run)
-		return SZ_DMAFLUSHP;
-
-	buf[0] = CMD_DMAFLUSHP;
-
-	peri &= 0x1f;
-	peri <<= 3;
-	buf[1] = peri;
-
-	PL330_DBGCMD_DUMP(SZ_DMAFLUSHP, "\tDMAFLUSHP %u\n", peri >> 3);
-
-	return SZ_DMAFLUSHP;
-}
-
-static inline u32 _emit_LD(unsigned dry_run, u8 buf[],	enum pl330_cond cond)
-{
-	if (dry_run)
-		return SZ_DMALD;
-
-	buf[0] = CMD_DMALD;
-
-	if (cond == SINGLE)
-		buf[0] |= (0 << 1) | (1 << 0);
-	else if (cond == BURST)
-		buf[0] |= (1 << 1) | (1 << 0);
-
-	PL330_DBGCMD_DUMP(SZ_DMALD, "\tDMALD%c\n",
-		cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'));
-
-	return SZ_DMALD;
-}
-
-static inline u32 _emit_LDP(unsigned dry_run, u8 buf[],
-		enum pl330_cond cond, u8 peri)
-{
-	if (dry_run)
-		return SZ_DMALDP;
-
-	buf[0] = CMD_DMALDP;
-
-	if (cond == BURST)
-		buf[0] |= (1 << 1);
-
-	peri &= 0x1f;
-	peri <<= 3;
-	buf[1] = peri;
-
-	PL330_DBGCMD_DUMP(SZ_DMALDP, "\tDMALDP%c %u\n",
-		cond == SINGLE ? 'S' : 'B', peri >> 3);
-
-	return SZ_DMALDP;
-}
-
-static inline u32 _emit_LP(unsigned dry_run, u8 buf[],
-		unsigned loop, u8 cnt)
-{
-	if (dry_run)
-		return SZ_DMALP;
-
-	buf[0] = CMD_DMALP;
-
-	if (loop)
-		buf[0] |= (1 << 1);
-
-	cnt--; /* DMAC increments by 1 internally */
-	buf[1] = cnt;
-
-	PL330_DBGCMD_DUMP(SZ_DMALP, "\tDMALP_%c %u\n", loop ? '1' : '0', cnt);
-
-	return SZ_DMALP;
-}
-
-struct _arg_LPEND {
-	enum pl330_cond cond;
-	bool forever;
-	unsigned loop;
-	u8 bjump;
-};
-
-static inline u32 _emit_LPEND(unsigned dry_run, u8 buf[],
-		const struct _arg_LPEND *arg)
-{
-	enum pl330_cond cond = arg->cond;
-	bool forever = arg->forever;
-	unsigned loop = arg->loop;
-	u8 bjump = arg->bjump;
-
-	if (dry_run)
-		return SZ_DMALPEND;
-
-	buf[0] = CMD_DMALPEND;
-
-	if (loop)
-		buf[0] |= (1 << 2);
-
-	if (!forever)
-		buf[0] |= (1 << 4);
-
-	if (cond == SINGLE)
-		buf[0] |= (0 << 1) | (1 << 0);
-	else if (cond == BURST)
-		buf[0] |= (1 << 1) | (1 << 0);
-
-	buf[1] = bjump;
-
-	PL330_DBGCMD_DUMP(SZ_DMALPEND, "\tDMALP%s%c_%c bjmpto_%x\n",
-			forever ? "FE" : "END",
-			cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'),
-			loop ? '1' : '0',
-			bjump);
-
-	return SZ_DMALPEND;
-}
-
-static inline u32 _emit_KILL(unsigned dry_run, u8 buf[])
-{
-	if (dry_run)
-		return SZ_DMAKILL;
-
-	buf[0] = CMD_DMAKILL;
-
-	return SZ_DMAKILL;
-}
-
-static inline u32 _emit_MOV(unsigned dry_run, u8 buf[],
-		enum dmamov_dst dst, u32 val)
-{
-	if (dry_run)
-		return SZ_DMAMOV;
-
-	buf[0] = CMD_DMAMOV;
-	buf[1] = dst;
-	*((u32 *)&buf[2]) = val;
-
-	PL330_DBGCMD_DUMP(SZ_DMAMOV, "\tDMAMOV %s 0x%x\n",
-		dst == SAR ? "SAR" : (dst == DAR ? "DAR" : "CCR"), val);
-
-	return SZ_DMAMOV;
-}
-
-static inline u32 _emit_NOP(unsigned dry_run, u8 buf[])
-{
-	if (dry_run)
-		return SZ_DMANOP;
-
-	buf[0] = CMD_DMANOP;
-
-	PL330_DBGCMD_DUMP(SZ_DMANOP, "\tDMANOP\n");
-
-	return SZ_DMANOP;
-}
-
-static inline u32 _emit_RMB(unsigned dry_run, u8 buf[])
-{
-	if (dry_run)
-		return SZ_DMARMB;
-
-	buf[0] = CMD_DMARMB;
-
-	PL330_DBGCMD_DUMP(SZ_DMARMB, "\tDMARMB\n");
-
-	return SZ_DMARMB;
-}
-
-static inline u32 _emit_SEV(unsigned dry_run, u8 buf[], u8 ev)
-{
-	if (dry_run)
-		return SZ_DMASEV;
-
-	buf[0] = CMD_DMASEV;
-
-	ev &= 0x1f;
-	ev <<= 3;
-	buf[1] = ev;
-
-	PL330_DBGCMD_DUMP(SZ_DMASEV, "\tDMASEV %u\n", ev >> 3);
-
-	return SZ_DMASEV;
-}
-
-static inline u32 _emit_ST(unsigned dry_run, u8 buf[], enum pl330_cond cond)
-{
-	if (dry_run)
-		return SZ_DMAST;
-
-	buf[0] = CMD_DMAST;
-
-	if (cond == SINGLE)
-		buf[0] |= (0 << 1) | (1 << 0);
-	else if (cond == BURST)
-		buf[0] |= (1 << 1) | (1 << 0);
-
-	PL330_DBGCMD_DUMP(SZ_DMAST, "\tDMAST%c\n",
-		cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'));
-
-	return SZ_DMAST;
-}
-
-static inline u32 _emit_STP(unsigned dry_run, u8 buf[],
-		enum pl330_cond cond, u8 peri)
-{
-	if (dry_run)
-		return SZ_DMASTP;
-
-	buf[0] = CMD_DMASTP;
-
-	if (cond == BURST)
-		buf[0] |= (1 << 1);
-
-	peri &= 0x1f;
-	peri <<= 3;
-	buf[1] = peri;
-
-	PL330_DBGCMD_DUMP(SZ_DMASTP, "\tDMASTP%c %u\n",
-		cond == SINGLE ? 'S' : 'B', peri >> 3);
-
-	return SZ_DMASTP;
-}
-
-static inline u32 _emit_STZ(unsigned dry_run, u8 buf[])
-{
-	if (dry_run)
-		return SZ_DMASTZ;
-
-	buf[0] = CMD_DMASTZ;
-
-	PL330_DBGCMD_DUMP(SZ_DMASTZ, "\tDMASTZ\n");
-
-	return SZ_DMASTZ;
-}
-
-static inline u32 _emit_WFE(unsigned dry_run, u8 buf[], u8 ev,
-		unsigned invalidate)
-{
-	if (dry_run)
-		return SZ_DMAWFE;
-
-	buf[0] = CMD_DMAWFE;
-
-	ev &= 0x1f;
-	ev <<= 3;
-	buf[1] = ev;
-
-	if (invalidate)
-		buf[1] |= (1 << 1);
-
-	PL330_DBGCMD_DUMP(SZ_DMAWFE, "\tDMAWFE %u%s\n",
-		ev >> 3, invalidate ? ", I" : "");
-
-	return SZ_DMAWFE;
-}
-
-static inline u32 _emit_WFP(unsigned dry_run, u8 buf[],
-		enum pl330_cond cond, u8 peri)
-{
-	if (dry_run)
-		return SZ_DMAWFP;
-
-	buf[0] = CMD_DMAWFP;
-
-	if (cond == SINGLE)
-		buf[0] |= (0 << 1) | (0 << 0);
-	else if (cond == BURST)
-		buf[0] |= (1 << 1) | (0 << 0);
-	else
-		buf[0] |= (0 << 1) | (1 << 0);
-
-	peri &= 0x1f;
-	peri <<= 3;
-	buf[1] = peri;
-
-	PL330_DBGCMD_DUMP(SZ_DMAWFP, "\tDMAWFP%c %u\n",
-		cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'P'), peri >> 3);
-
-	return SZ_DMAWFP;
-}
-
-static inline u32 _emit_WMB(unsigned dry_run, u8 buf[])
-{
-	if (dry_run)
-		return SZ_DMAWMB;
-
-	buf[0] = CMD_DMAWMB;
-
-	PL330_DBGCMD_DUMP(SZ_DMAWMB, "\tDMAWMB\n");
-
-	return SZ_DMAWMB;
-}
-
-struct _arg_GO {
-	u8 chan;
-	u32 addr;
-	unsigned ns;
-};
-
-static inline u32 _emit_GO(unsigned dry_run, u8 buf[],
-		const struct _arg_GO *arg)
-{
-	u8 chan = arg->chan;
-	u32 addr = arg->addr;
-	unsigned ns = arg->ns;
-
-	if (dry_run)
-		return SZ_DMAGO;
-
-	buf[0] = CMD_DMAGO;
-	buf[0] |= (ns << 1);
-
-	buf[1] = chan & 0x7;
-
-	*((u32 *)&buf[2]) = addr;
-
-	return SZ_DMAGO;
-}
-
-#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
-
-/* Returns Time-Out */
-static bool _until_dmac_idle(struct pl330_thread *thrd)
-{
-	void __iomem *regs = thrd->dmac->pinfo->base;
-	unsigned long loops = msecs_to_loops(5);
-
-	do {
-		/* Until Manager is Idle */
-		if (!(readl(regs + DBGSTATUS) & DBG_BUSY))
-			break;
-
-		cpu_relax();
-	} while (--loops);
-
-	if (!loops)
-		return true;
-
-	return false;
-}
-
-static inline void _execute_DBGINSN(struct pl330_thread *thrd,
-		u8 insn[], bool as_manager)
-{
-	void __iomem *regs = thrd->dmac->pinfo->base;
-	u32 val;
-
-	val = (insn[0] << 16) | (insn[1] << 24);
-	if (!as_manager) {
-		val |= (1 << 0);
-		val |= (thrd->id << 8); /* Channel Number */
-	}
-	writel(val, regs + DBGINST0);
-
-	val = *((u32 *)&insn[2]);
-	writel(val, regs + DBGINST1);
-
-	/* If timed out due to halted state-machine */
-	if (_until_dmac_idle(thrd)) {
-		dev_err(thrd->dmac->pinfo->dev, "DMAC halted!\n");
-		return;
-	}
-
-	/* Get going */
-	writel(0, regs + DBGCMD);
-}
-
-/*
- * Mark a _pl330_req as free.
- * We do it by writing DMAEND as the first instruction
- * because no valid request is going to have DMAEND as
- * its first instruction to execute.
- */
-static void mark_free(struct pl330_thread *thrd, int idx)
-{
-	struct _pl330_req *req = &thrd->req[idx];
-
-	_emit_END(0, req->mc_cpu);
-	req->mc_len = 0;
-
-	thrd->req_running = -1;
-}
-
-static inline u32 _state(struct pl330_thread *thrd)
-{
-	void __iomem *regs = thrd->dmac->pinfo->base;
-	u32 val;
-
-	if (is_manager(thrd))
-		val = readl(regs + DS) & 0xf;
-	else
-		val = readl(regs + CS(thrd->id)) & 0xf;
-
-	switch (val) {
-	case DS_ST_STOP:
-		return PL330_STATE_STOPPED;
-	case DS_ST_EXEC:
-		return PL330_STATE_EXECUTING;
-	case DS_ST_CMISS:
-		return PL330_STATE_CACHEMISS;
-	case DS_ST_UPDTPC:
-		return PL330_STATE_UPDTPC;
-	case DS_ST_WFE:
-		return PL330_STATE_WFE;
-	case DS_ST_FAULT:
-		return PL330_STATE_FAULTING;
-	case DS_ST_ATBRR:
-		if (is_manager(thrd))
-			return PL330_STATE_INVALID;
-		else
-			return PL330_STATE_ATBARRIER;
-	case DS_ST_QBUSY:
-		if (is_manager(thrd))
-			return PL330_STATE_INVALID;
-		else
-			return PL330_STATE_QUEUEBUSY;
-	case DS_ST_WFP:
-		if (is_manager(thrd))
-			return PL330_STATE_INVALID;
-		else
-			return PL330_STATE_WFP;
-	case DS_ST_KILL:
-		if (is_manager(thrd))
-			return PL330_STATE_INVALID;
-		else
-			return PL330_STATE_KILLING;
-	case DS_ST_CMPLT:
-		if (is_manager(thrd))
-			return PL330_STATE_INVALID;
-		else
-			return PL330_STATE_COMPLETING;
-	case DS_ST_FLTCMP:
-		if (is_manager(thrd))
-			return PL330_STATE_INVALID;
-		else
-			return PL330_STATE_FAULT_COMPLETING;
-	default:
-		return PL330_STATE_INVALID;
-	}
-}
-
-static void _stop(struct pl330_thread *thrd)
-{
-	void __iomem *regs = thrd->dmac->pinfo->base;
-	u8 insn[6] = {0, 0, 0, 0, 0, 0};
-
-	if (_state(thrd) == PL330_STATE_FAULT_COMPLETING)
-		UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING);
-
-	/* Return if nothing needs to be done */
-	if (_state(thrd) == PL330_STATE_COMPLETING
-		  || _state(thrd) == PL330_STATE_KILLING
-		  || _state(thrd) == PL330_STATE_STOPPED)
-		return;
-
-	_emit_KILL(0, insn);
-
-	/* Stop generating interrupts for SEV */
-	writel(readl(regs + INTEN) & ~(1 << thrd->ev), regs + INTEN);
-
-	_execute_DBGINSN(thrd, insn, is_manager(thrd));
-}
-
-/* Start doing req 'idx' of thread 'thrd' */
-static bool _trigger(struct pl330_thread *thrd)
-{
-	void __iomem *regs = thrd->dmac->pinfo->base;
-	struct _pl330_req *req;
-	struct pl330_req *r;
-	struct _arg_GO go;
-	unsigned ns;
-	u8 insn[6] = {0, 0, 0, 0, 0, 0};
-	int idx;
-
-	/* Return if already ACTIVE */
-	if (_state(thrd) != PL330_STATE_STOPPED)
-		return true;
-
-	idx = 1 - thrd->lstenq;
-	if (!IS_FREE(&thrd->req[idx]))
-		req = &thrd->req[idx];
-	else {
-		idx = thrd->lstenq;
-		if (!IS_FREE(&thrd->req[idx]))
-			req = &thrd->req[idx];
-		else
-			req = NULL;
-	}
-
-	/* Return if no request */
-	if (!req || !req->r)
-		return true;
-
-	r = req->r;
-
-	if (r->cfg)
-		ns = r->cfg->nonsecure ? 1 : 0;
-	else if (readl(regs + CS(thrd->id)) & CS_CNS)
-		ns = 1;
-	else
-		ns = 0;
-
-	/* See 'Abort Sources' point-4 at Page 2-25 */
-	if (_manager_ns(thrd) && !ns)
-		dev_info(thrd->dmac->pinfo->dev, "%s:%d Recipe for ABORT!\n",
-			__func__, __LINE__);
-
-	go.chan = thrd->id;
-	go.addr = req->mc_bus;
-	go.ns = ns;
-	_emit_GO(0, insn, &go);
-
-	/* Set to generate interrupts for SEV */
-	writel(readl(regs + INTEN) | (1 << thrd->ev), regs + INTEN);
-
-	/* Only manager can execute GO */
-	_execute_DBGINSN(thrd, insn, true);
-
-	thrd->req_running = idx;
-
-	return true;
-}
-
-static bool _start(struct pl330_thread *thrd)
-{
-	switch (_state(thrd)) {
-	case PL330_STATE_FAULT_COMPLETING:
-		UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING);
-
-		if (_state(thrd) == PL330_STATE_KILLING)
-			UNTIL(thrd, PL330_STATE_STOPPED)
-
-	case PL330_STATE_FAULTING:
-		_stop(thrd);
-
-	case PL330_STATE_KILLING:
-	case PL330_STATE_COMPLETING:
-		UNTIL(thrd, PL330_STATE_STOPPED)
-
-	case PL330_STATE_STOPPED:
-		return _trigger(thrd);
-
-	case PL330_STATE_WFP:
-	case PL330_STATE_QUEUEBUSY:
-	case PL330_STATE_ATBARRIER:
-	case PL330_STATE_UPDTPC:
-	case PL330_STATE_CACHEMISS:
-	case PL330_STATE_EXECUTING:
-		return true;
-
-	case PL330_STATE_WFE: /* For RESUME, nothing yet */
-	default:
-		return false;
-	}
-}
-
-static inline int _ldst_memtomem(unsigned dry_run, u8 buf[],
-		const struct _xfer_spec *pxs, int cyc)
-{
-	int off = 0;
-
-	while (cyc--) {
-		off += _emit_LD(dry_run, &buf[off], ALWAYS);
-		off += _emit_RMB(dry_run, &buf[off]);
-		off += _emit_ST(dry_run, &buf[off], ALWAYS);
-		off += _emit_WMB(dry_run, &buf[off]);
-	}
-
-	return off;
-}
-
-static inline int _ldst_devtomem(unsigned dry_run, u8 buf[],
-		const struct _xfer_spec *pxs, int cyc)
-{
-	int off = 0;
-
-	while (cyc--) {
-		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
-		off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->r->peri);
-		off += _emit_ST(dry_run, &buf[off], ALWAYS);
-		off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
-	}
-
-	return off;
-}
-
-static inline int _ldst_memtodev(unsigned dry_run, u8 buf[],
-		const struct _xfer_spec *pxs, int cyc)
-{
-	int off = 0;
-
-	while (cyc--) {
-		off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
-		off += _emit_LD(dry_run, &buf[off], ALWAYS);
-		off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->r->peri);
-		off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
-	}
-
-	return off;
-}
-
-static int _bursts(unsigned dry_run, u8 buf[],
-		const struct _xfer_spec *pxs, int cyc)
-{
-	int off = 0;
-
-	switch (pxs->r->rqtype) {
-	case MEMTODEV:
-		off += _ldst_memtodev(dry_run, &buf[off], pxs, cyc);
-		break;
-	case DEVTOMEM:
-		off += _ldst_devtomem(dry_run, &buf[off], pxs, cyc);
-		break;
-	case MEMTOMEM:
-		off += _ldst_memtomem(dry_run, &buf[off], pxs, cyc);
-		break;
-	default:
-		off += 0x40000000; /* Scare off the Client */
-		break;
-	}
-
-	return off;
-}
-
-/* Returns bytes consumed and updates bursts */
-static inline int _loop(unsigned dry_run, u8 buf[],
-		unsigned long *bursts, const struct _xfer_spec *pxs)
-{
-	int cyc, cycmax, szlp, szlpend, szbrst, off;
-	unsigned lcnt0, lcnt1, ljmp0, ljmp1;
-	struct _arg_LPEND lpend;
-
-	/* Max iterations possible in DMALP is 256 */
-	if (*bursts >= 256*256) {
-		lcnt1 = 256;
-		lcnt0 = 256;
-		cyc = *bursts / lcnt1 / lcnt0;
-	} else if (*bursts > 256) {
-		lcnt1 = 256;
-		lcnt0 = *bursts / lcnt1;
-		cyc = 1;
-	} else {
-		lcnt1 = *bursts;
-		lcnt0 = 0;
-		cyc = 1;
-	}
-
-	szlp = _emit_LP(1, buf, 0, 0);
-	szbrst = _bursts(1, buf, pxs, 1);
-
-	lpend.cond = ALWAYS;
-	lpend.forever = false;
-	lpend.loop = 0;
-	lpend.bjump = 0;
-	szlpend = _emit_LPEND(1, buf, &lpend);
-
-	if (lcnt0) {
-		szlp *= 2;
-		szlpend *= 2;
-	}
-
-	/*
-	 * Max bursts that we can unroll due to limit on the
-	 * size of backward jump that can be encoded in DMALPEND
-	 * which is 8-bits and hence 255
-	 */
-	cycmax = (255 - (szlp + szlpend)) / szbrst;
-
-	cyc = (cycmax < cyc) ? cycmax : cyc;
-
-	off = 0;
-
-	if (lcnt0) {
-		off += _emit_LP(dry_run, &buf[off], 0, lcnt0);
-		ljmp0 = off;
-	}
-
-	off += _emit_LP(dry_run, &buf[off], 1, lcnt1);
-	ljmp1 = off;
-
-	off += _bursts(dry_run, &buf[off], pxs, cyc);
-
-	lpend.cond = ALWAYS;
-	lpend.forever = false;
-	lpend.loop = 1;
-	lpend.bjump = off - ljmp1;
-	off += _emit_LPEND(dry_run, &buf[off], &lpend);
-
-	if (lcnt0) {
-		lpend.cond = ALWAYS;
-		lpend.forever = false;
-		lpend.loop = 0;
-		lpend.bjump = off - ljmp0;
-		off += _emit_LPEND(dry_run, &buf[off], &lpend);
-	}
-
-	*bursts = lcnt1 * cyc;
-	if (lcnt0)
-		*bursts *= lcnt0;
-
-	return off;
-}
-
-static inline int _setup_loops(unsigned dry_run, u8 buf[],
-		const struct _xfer_spec *pxs)
-{
-	struct pl330_xfer *x = pxs->x;
-	u32 ccr = pxs->ccr;
-	unsigned long c, bursts = BYTE_TO_BURST(x->bytes, ccr);
-	int off = 0;
-
-	while (bursts) {
-		c = bursts;
-		off += _loop(dry_run, &buf[off], &c, pxs);
-		bursts -= c;
-	}
-
-	return off;
-}
-
-static inline int _setup_xfer(unsigned dry_run, u8 buf[],
-		const struct _xfer_spec *pxs)
-{
-	struct pl330_xfer *x = pxs->x;
-	int off = 0;
-
-	/* DMAMOV SAR, x->src_addr */
-	off += _emit_MOV(dry_run, &buf[off], SAR, x->src_addr);
-	/* DMAMOV DAR, x->dst_addr */
-	off += _emit_MOV(dry_run, &buf[off], DAR, x->dst_addr);
-
-	/* Setup Loop(s) */
-	off += _setup_loops(dry_run, &buf[off], pxs);
-
-	return off;
-}
-
-/*
- * A req is a sequence of one or more xfer units.
- * Returns the number of bytes taken to setup the MC for the req.
- */
-static int _setup_req(unsigned dry_run, struct pl330_thread *thrd,
-		unsigned index, struct _xfer_spec *pxs)
-{
-	struct _pl330_req *req = &thrd->req[index];
-	struct pl330_xfer *x;
-	u8 *buf = req->mc_cpu;
-	int off = 0;
-
-	PL330_DBGMC_START(req->mc_bus);
-
-	/* DMAMOV CCR, ccr */
-	off += _emit_MOV(dry_run, &buf[off], CCR, pxs->ccr);
-
-	x = pxs->r->x;
-	do {
-		/* Error if xfer length is not aligned at burst size */
-		if (x->bytes % (BRST_SIZE(pxs->ccr) * BRST_LEN(pxs->ccr)))
-			return -EINVAL;
-
-		pxs->x = x;
-		off += _setup_xfer(dry_run, &buf[off], pxs);
-
-		x = x->next;
-	} while (x);
-
-	/* DMASEV peripheral/event */
-	off += _emit_SEV(dry_run, &buf[off], thrd->ev);
-	/* DMAEND */
-	off += _emit_END(dry_run, &buf[off]);
-
-	return off;
-}
-
-static inline u32 _prepare_ccr(const struct pl330_reqcfg *rqc)
-{
-	u32 ccr = 0;
-
-	if (rqc->src_inc)
-		ccr |= CC_SRCINC;
-
-	if (rqc->dst_inc)
-		ccr |= CC_DSTINC;
-
-	/* We set same protection levels for Src and DST for now */
-	if (rqc->privileged)
-		ccr |= CC_SRCPRI | CC_DSTPRI;
-	if (rqc->nonsecure)
-		ccr |= CC_SRCNS | CC_DSTNS;
-	if (rqc->insnaccess)
-		ccr |= CC_SRCIA | CC_DSTIA;
-
-	ccr |= (((rqc->brst_len - 1) & 0xf) << CC_SRCBRSTLEN_SHFT);
-	ccr |= (((rqc->brst_len - 1) & 0xf) << CC_DSTBRSTLEN_SHFT);
-
-	ccr |= (rqc->brst_size << CC_SRCBRSTSIZE_SHFT);
-	ccr |= (rqc->brst_size << CC_DSTBRSTSIZE_SHFT);
-
-	ccr |= (rqc->scctl << CC_SRCCCTRL_SHFT);
-	ccr |= (rqc->dcctl << CC_DSTCCTRL_SHFT);
-
-	ccr |= (rqc->swap << CC_SWAP_SHFT);
-
-	return ccr;
-}
-
-static inline bool _is_valid(u32 ccr)
-{
-	enum pl330_dstcachectrl dcctl;
-	enum pl330_srccachectrl scctl;
-
-	dcctl = (ccr >> CC_DSTCCTRL_SHFT) & CC_DRCCCTRL_MASK;
-	scctl = (ccr >> CC_SRCCCTRL_SHFT) & CC_SRCCCTRL_MASK;
-
-	if (dcctl == DINVALID1 || dcctl == DINVALID2
-			|| scctl == SINVALID1 || scctl == SINVALID2)
-		return false;
-	else
-		return true;
-}
-
-/*
- * Submit a list of xfers after which the client wants notification.
- * Client is not notified after each xfer unit, just once after all
- * xfer units are done or some error occurs.
- */
-int pl330_submit_req(void *ch_id, struct pl330_req *r)
-{
-	struct pl330_thread *thrd = ch_id;
-	struct pl330_dmac *pl330;
-	struct pl330_info *pi;
-	struct _xfer_spec xs;
-	unsigned long flags;
-	void __iomem *regs;
-	unsigned idx;
-	u32 ccr;
-	int ret = 0;
-
-	/* No Req or Unacquired Channel or DMAC */
-	if (!r || !thrd || thrd->free)
-		return -EINVAL;
-
-	pl330 = thrd->dmac;
-	pi = pl330->pinfo;
-	regs = pi->base;
-
-	if (pl330->state == DYING
-		|| pl330->dmac_tbd.reset_chan & (1 << thrd->id)) {
-		dev_info(thrd->dmac->pinfo->dev, "%s:%d\n",
-			__func__, __LINE__);
-		return -EAGAIN;
-	}
-
-	/* If request for non-existing peripheral */
-	if (r->rqtype != MEMTOMEM && r->peri >= pi->pcfg.num_peri) {
-		dev_info(thrd->dmac->pinfo->dev,
-				"%s:%d Invalid peripheral(%u)!\n",
-				__func__, __LINE__, r->peri);
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&pl330->lock, flags);
-
-	if (_queue_full(thrd)) {
-		ret = -EAGAIN;
-		goto xfer_exit;
-	}
-
-	/* Prefer Secure Channel */
-	if (!_manager_ns(thrd))
-		r->cfg->nonsecure = 0;
-	else
-		r->cfg->nonsecure = 1;
-
-	/* Use last settings, if not provided */
-	if (r->cfg)
-		ccr = _prepare_ccr(r->cfg);
-	else
-		ccr = readl(regs + CC(thrd->id));
-
-	/* If this req doesn't have valid xfer settings */
-	if (!_is_valid(ccr)) {
-		ret = -EINVAL;
-		dev_info(thrd->dmac->pinfo->dev, "%s:%d Invalid CCR(%x)!\n",
-			__func__, __LINE__, ccr);
-		goto xfer_exit;
-	}
-
-	idx = IS_FREE(&thrd->req[0]) ? 0 : 1;
-
-	xs.ccr = ccr;
-	xs.r = r;
-
-	/* First dry run to check if req is acceptable */
-	ret = _setup_req(1, thrd, idx, &xs);
-	if (ret < 0)
-		goto xfer_exit;
-
-	if (ret > pi->mcbufsz / 2) {
-		dev_info(thrd->dmac->pinfo->dev,
-			"%s:%d Trying increasing mcbufsz\n",
-				__func__, __LINE__);
-		ret = -ENOMEM;
-		goto xfer_exit;
-	}
-
-	/* Hook the request */
-	thrd->lstenq = idx;
-	thrd->req[idx].mc_len = _setup_req(0, thrd, idx, &xs);
-	thrd->req[idx].r = r;
-
-	ret = 0;
-
-xfer_exit:
-	spin_unlock_irqrestore(&pl330->lock, flags);
-
-	return ret;
-}
-EXPORT_SYMBOL(pl330_submit_req);
-
-static void pl330_dotask(unsigned long data)
-{
-	struct pl330_dmac *pl330 = (struct pl330_dmac *) data;
-	struct pl330_info *pi = pl330->pinfo;
-	unsigned long flags;
-	int i;
-
-	spin_lock_irqsave(&pl330->lock, flags);
-
-	/* The DMAC itself gone nuts */
-	if (pl330->dmac_tbd.reset_dmac) {
-		pl330->state = DYING;
-		/* Reset the manager too */
-		pl330->dmac_tbd.reset_mngr = true;
-		/* Clear the reset flag */
-		pl330->dmac_tbd.reset_dmac = false;
-	}
-
-	if (pl330->dmac_tbd.reset_mngr) {
-		_stop(pl330->manager);
-		/* Reset all channels */
-		pl330->dmac_tbd.reset_chan = (1 << pi->pcfg.num_chan) - 1;
-		/* Clear the reset flag */
-		pl330->dmac_tbd.reset_mngr = false;
-	}
-
-	for (i = 0; i < pi->pcfg.num_chan; i++) {
-
-		if (pl330->dmac_tbd.reset_chan & (1 << i)) {
-			struct pl330_thread *thrd = &pl330->channels[i];
-			void __iomem *regs = pi->base;
-			enum pl330_op_err err;
-
-			_stop(thrd);
-
-			if (readl(regs + FSC) & (1 << thrd->id))
-				err = PL330_ERR_FAIL;
-			else
-				err = PL330_ERR_ABORT;
-
-			spin_unlock_irqrestore(&pl330->lock, flags);
-
-			_callback(thrd->req[1 - thrd->lstenq].r, err);
-			_callback(thrd->req[thrd->lstenq].r, err);
-
-			spin_lock_irqsave(&pl330->lock, flags);
-
-			thrd->req[0].r = NULL;
-			thrd->req[1].r = NULL;
-			mark_free(thrd, 0);
-			mark_free(thrd, 1);
-
-			/* Clear the reset flag */
-			pl330->dmac_tbd.reset_chan &= ~(1 << i);
-		}
-	}
-
-	spin_unlock_irqrestore(&pl330->lock, flags);
-
-	return;
-}
-
-/* Returns 1 if state was updated, 0 otherwise */
-int pl330_update(const struct pl330_info *pi)
-{
-	struct _pl330_req *rqdone;
-	struct pl330_dmac *pl330;
-	unsigned long flags;
-	void __iomem *regs;
-	u32 val;
-	int id, ev, ret = 0;
-
-	if (!pi || !pi->pl330_data)
-		return 0;
-
-	regs = pi->base;
-	pl330 = pi->pl330_data;
-
-	spin_lock_irqsave(&pl330->lock, flags);
-
-	val = readl(regs + FSM) & 0x1;
-	if (val)
-		pl330->dmac_tbd.reset_mngr = true;
-	else
-		pl330->dmac_tbd.reset_mngr = false;
-
-	val = readl(regs + FSC) & ((1 << pi->pcfg.num_chan) - 1);
-	pl330->dmac_tbd.reset_chan |= val;
-	if (val) {
-		int i = 0;
-		while (i < pi->pcfg.num_chan) {
-			if (val & (1 << i)) {
-				dev_info(pi->dev,
-					"Reset Channel-%d\t CS-%x FTC-%x\n",
-						i, readl(regs + CS(i)),
-						readl(regs + FTC(i)));
-				_stop(&pl330->channels[i]);
-			}
-			i++;
-		}
-	}
-
-	/* Check which event happened i.e, thread notified */
-	val = readl(regs + ES);
-	if (pi->pcfg.num_events < 32
-			&& val & ~((1 << pi->pcfg.num_events) - 1)) {
-		pl330->dmac_tbd.reset_dmac = true;
-		dev_err(pi->dev, "%s:%d Unexpected!\n", __func__, __LINE__);
-		ret = 1;
-		goto updt_exit;
-	}
-
-	for (ev = 0; ev < pi->pcfg.num_events; ev++) {
-		if (val & (1 << ev)) { /* Event occurred */
-			struct pl330_thread *thrd;
-			u32 inten = readl(regs + INTEN);
-			int active;
-
-			/* Clear the event */
-			if (inten & (1 << ev))
-				writel(1 << ev, regs + INTCLR);
-
-			ret = 1;
-
-			id = pl330->events[ev];
-
-			thrd = &pl330->channels[id];
-
-			active = thrd->req_running;
-			if (active == -1) /* Aborted */
-				continue;
-
-			rqdone = &thrd->req[active];
-			mark_free(thrd, active);
-
-			/* Get going again ASAP */
-			_start(thrd);
-
-			/* For now, just make a list of callbacks to be done */
-			list_add_tail(&rqdone->rqd, &pl330->req_done);
-		}
-	}
-
-	/* Now that we are in no hurry, do the callbacks */
-	while (!list_empty(&pl330->req_done)) {
-		struct pl330_req *r;
-
-		rqdone = container_of(pl330->req_done.next,
-					struct _pl330_req, rqd);
-
-		list_del_init(&rqdone->rqd);
-
-		/* Detach the req */
-		r = rqdone->r;
-		rqdone->r = NULL;
-
-		spin_unlock_irqrestore(&pl330->lock, flags);
-		_callback(r, PL330_ERR_NONE);
-		spin_lock_irqsave(&pl330->lock, flags);
-	}
-
-updt_exit:
-	spin_unlock_irqrestore(&pl330->lock, flags);
-
-	if (pl330->dmac_tbd.reset_dmac
-			|| pl330->dmac_tbd.reset_mngr
-			|| pl330->dmac_tbd.reset_chan) {
-		ret = 1;
-		tasklet_schedule(&pl330->tasks);
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL(pl330_update);
-
-int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op)
-{
-	struct pl330_thread *thrd = ch_id;
-	struct pl330_dmac *pl330;
-	unsigned long flags;
-	int ret = 0, active = thrd->req_running;
-
-	if (!thrd || thrd->free || thrd->dmac->state == DYING)
-		return -EINVAL;
-
-	pl330 = thrd->dmac;
-
-	spin_lock_irqsave(&pl330->lock, flags);
-
-	switch (op) {
-	case PL330_OP_FLUSH:
-		/* Make sure the channel is stopped */
-		_stop(thrd);
-
-		thrd->req[0].r = NULL;
-		thrd->req[1].r = NULL;
-		mark_free(thrd, 0);
-		mark_free(thrd, 1);
-		break;
-
-	case PL330_OP_ABORT:
-		/* Make sure the channel is stopped */
-		_stop(thrd);
-
-		/* ABORT is only for the active req */
-		if (active == -1)
-			break;
-
-		thrd->req[active].r = NULL;
-		mark_free(thrd, active);
-
-		/* Start the next */
-	case PL330_OP_START:
-		if ((active == -1) && !_start(thrd))
-			ret = -EIO;
-		break;
-
-	default:
-		ret = -EINVAL;
-	}
-
-	spin_unlock_irqrestore(&pl330->lock, flags);
-	return ret;
-}
-EXPORT_SYMBOL(pl330_chan_ctrl);
-
-int pl330_chan_status(void *ch_id, struct pl330_chanstatus *pstatus)
-{
-	struct pl330_thread *thrd = ch_id;
-	struct pl330_dmac *pl330;
-	struct pl330_info *pi;
-	void __iomem *regs;
-	int active;
-	u32 val;
-
-	if (!pstatus || !thrd || thrd->free)
-		return -EINVAL;
-
-	pl330 = thrd->dmac;
-	pi = pl330->pinfo;
-	regs = pi->base;
-
-	/* The client should remove the DMAC and add again */
-	if (pl330->state == DYING)
-		pstatus->dmac_halted = true;
-	else
-		pstatus->dmac_halted = false;
-
-	val = readl(regs + FSC);
-	if (val & (1 << thrd->id))
-		pstatus->faulting = true;
-	else
-		pstatus->faulting = false;
-
-	active = thrd->req_running;
-
-	if (active == -1) {
-		/* Indicate that the thread is not running */
-		pstatus->top_req = NULL;
-		pstatus->wait_req = NULL;
-	} else {
-		pstatus->top_req = thrd->req[active].r;
-		pstatus->wait_req = !IS_FREE(&thrd->req[1 - active])
-					? thrd->req[1 - active].r : NULL;
-	}
-
-	pstatus->src_addr = readl(regs + SA(thrd->id));
-	pstatus->dst_addr = readl(regs + DA(thrd->id));
-
-	return 0;
-}
-EXPORT_SYMBOL(pl330_chan_status);
-
-/* Reserve an event */
-static inline int _alloc_event(struct pl330_thread *thrd)
-{
-	struct pl330_dmac *pl330 = thrd->dmac;
-	struct pl330_info *pi = pl330->pinfo;
-	int ev;
-
-	for (ev = 0; ev < pi->pcfg.num_events; ev++)
-		if (pl330->events[ev] == -1) {
-			pl330->events[ev] = thrd->id;
-			return ev;
-		}
-
-	return -1;
-}
-
-static bool _chan_ns(const struct pl330_info *pi, int i)
-{
-	return pi->pcfg.irq_ns & (1 << i);
-}
-
-/* Upon success, returns IdentityToken for the
- * allocated channel, NULL otherwise.
- */
-void *pl330_request_channel(const struct pl330_info *pi)
-{
-	struct pl330_thread *thrd = NULL;
-	struct pl330_dmac *pl330;
-	unsigned long flags;
-	int chans, i;
-
-	if (!pi || !pi->pl330_data)
-		return NULL;
-
-	pl330 = pi->pl330_data;
-
-	if (pl330->state == DYING)
-		return NULL;
-
-	chans = pi->pcfg.num_chan;
-
-	spin_lock_irqsave(&pl330->lock, flags);
-
-	for (i = 0; i < chans; i++) {
-		thrd = &pl330->channels[i];
-		if ((thrd->free) && (!_manager_ns(thrd) ||
-					_chan_ns(pi, i))) {
-			thrd->ev = _alloc_event(thrd);
-			if (thrd->ev >= 0) {
-				thrd->free = false;
-				thrd->lstenq = 1;
-				thrd->req[0].r = NULL;
-				mark_free(thrd, 0);
-				thrd->req[1].r = NULL;
-				mark_free(thrd, 1);
-				break;
-			}
-		}
-		thrd = NULL;
-	}
-
-	spin_unlock_irqrestore(&pl330->lock, flags);
-
-	return thrd;
-}
-EXPORT_SYMBOL(pl330_request_channel);
-
-/* Release an event */
-static inline void _free_event(struct pl330_thread *thrd, int ev)
-{
-	struct pl330_dmac *pl330 = thrd->dmac;
-	struct pl330_info *pi = pl330->pinfo;
-
-	/* If the event is valid and was held by the thread */
-	if (ev >= 0 && ev < pi->pcfg.num_events
-			&& pl330->events[ev] == thrd->id)
-		pl330->events[ev] = -1;
-}
-
-void pl330_release_channel(void *ch_id)
-{
-	struct pl330_thread *thrd = ch_id;
-	struct pl330_dmac *pl330;
-	unsigned long flags;
-
-	if (!thrd || thrd->free)
-		return;
-
-	_stop(thrd);
-
-	_callback(thrd->req[1 - thrd->lstenq].r, PL330_ERR_ABORT);
-	_callback(thrd->req[thrd->lstenq].r, PL330_ERR_ABORT);
-
-	pl330 = thrd->dmac;
-
-	spin_lock_irqsave(&pl330->lock, flags);
-	_free_event(thrd, thrd->ev);
-	thrd->free = true;
-	spin_unlock_irqrestore(&pl330->lock, flags);
-}
-EXPORT_SYMBOL(pl330_release_channel);
-
-/* Initialize the structure for PL330 configuration, that can be used
- * by the client driver the make best use of the DMAC
- */
-static void read_dmac_config(struct pl330_info *pi)
-{
-	void __iomem *regs = pi->base;
-	u32 val;
-
-	val = readl(regs + CRD) >> CRD_DATA_WIDTH_SHIFT;
-	val &= CRD_DATA_WIDTH_MASK;
-	pi->pcfg.data_bus_width = 8 * (1 << val);
-
-	val = readl(regs + CRD) >> CRD_DATA_BUFF_SHIFT;
-	val &= CRD_DATA_BUFF_MASK;
-	pi->pcfg.data_buf_dep = val + 1;
-
-	val = readl(regs + CR0) >> CR0_NUM_CHANS_SHIFT;
-	val &= CR0_NUM_CHANS_MASK;
-	val += 1;
-	pi->pcfg.num_chan = val;
-
-	val = readl(regs + CR0);
-	if (val & CR0_PERIPH_REQ_SET) {
-		val = (val >> CR0_NUM_PERIPH_SHIFT) & CR0_NUM_PERIPH_MASK;
-		val += 1;
-		pi->pcfg.num_peri = val;
-		pi->pcfg.peri_ns = readl(regs + CR4);
-	} else {
-		pi->pcfg.num_peri = 0;
-	}
-
-	val = readl(regs + CR0);
-	if (val & CR0_BOOT_MAN_NS)
-		pi->pcfg.mode |= DMAC_MODE_NS;
-	else
-		pi->pcfg.mode &= ~DMAC_MODE_NS;
-
-	val = readl(regs + CR0) >> CR0_NUM_EVENTS_SHIFT;
-	val &= CR0_NUM_EVENTS_MASK;
-	val += 1;
-	pi->pcfg.num_events = val;
-
-	pi->pcfg.irq_ns = readl(regs + CR3);
-
-	pi->pcfg.periph_id = get_id(pi, PERIPH_ID);
-	pi->pcfg.pcell_id = get_id(pi, PCELL_ID);
-}
-
-static inline void _reset_thread(struct pl330_thread *thrd)
-{
-	struct pl330_dmac *pl330 = thrd->dmac;
-	struct pl330_info *pi = pl330->pinfo;
-
-	thrd->req[0].mc_cpu = pl330->mcode_cpu
-				+ (thrd->id * pi->mcbufsz);
-	thrd->req[0].mc_bus = pl330->mcode_bus
-				+ (thrd->id * pi->mcbufsz);
-	thrd->req[0].r = NULL;
-	mark_free(thrd, 0);
-
-	thrd->req[1].mc_cpu = thrd->req[0].mc_cpu
-				+ pi->mcbufsz / 2;
-	thrd->req[1].mc_bus = thrd->req[0].mc_bus
-				+ pi->mcbufsz / 2;
-	thrd->req[1].r = NULL;
-	mark_free(thrd, 1);
-}
-
-static int dmac_alloc_threads(struct pl330_dmac *pl330)
-{
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
-	struct pl330_thread *thrd;
-	int i;
-
-	/* Allocate 1 Manager and 'chans' Channel threads */
-	pl330->channels = kzalloc((1 + chans) * sizeof(*thrd),
-					GFP_KERNEL);
-	if (!pl330->channels)
-		return -ENOMEM;
-
-	/* Init Channel threads */
-	for (i = 0; i < chans; i++) {
-		thrd = &pl330->channels[i];
-		thrd->id = i;
-		thrd->dmac = pl330;
-		_reset_thread(thrd);
-		thrd->free = true;
-	}
-
-	/* MANAGER is indexed at the end */
-	thrd = &pl330->channels[chans];
-	thrd->id = chans;
-	thrd->dmac = pl330;
-	thrd->free = false;
-	pl330->manager = thrd;
-
-	return 0;
-}
-
-static int dmac_alloc_resources(struct pl330_dmac *pl330)
-{
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
-	int ret;
-
-	/*
-	 * Alloc MicroCode buffer for 'chans' Channel threads.
-	 * A channel's buffer offset is (Channel_Id * MCODE_BUFF_PERCHAN)
-	 */
-	pl330->mcode_cpu = dma_alloc_coherent(pi->dev,
-				chans * pi->mcbufsz,
-				&pl330->mcode_bus, GFP_KERNEL);
-	if (!pl330->mcode_cpu) {
-		dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
-			__func__, __LINE__);
-		return -ENOMEM;
-	}
-
-	ret = dmac_alloc_threads(pl330);
-	if (ret) {
-		dev_err(pi->dev, "%s:%d Can't to create channels for DMAC!\n",
-			__func__, __LINE__);
-		dma_free_coherent(pi->dev,
-				chans * pi->mcbufsz,
-				pl330->mcode_cpu, pl330->mcode_bus);
-		return ret;
-	}
-
-	return 0;
-}
-
-int pl330_add(struct pl330_info *pi)
-{
-	struct pl330_dmac *pl330;
-	void __iomem *regs;
-	int i, ret;
-
-	if (!pi || !pi->dev)
-		return -EINVAL;
-
-	/* If already added */
-	if (pi->pl330_data)
-		return -EINVAL;
-
-	/*
-	 * If the SoC can perform reset on the DMAC, then do it
-	 * before reading its configuration.
-	 */
-	if (pi->dmac_reset)
-		pi->dmac_reset(pi);
-
-	regs = pi->base;
-
-	/* Check if we can handle this DMAC */
-	if ((get_id(pi, PERIPH_ID) & 0xfffff) != PERIPH_ID_VAL
-	   || get_id(pi, PCELL_ID) != PCELL_ID_VAL) {
-		dev_err(pi->dev, "PERIPH_ID 0x%x, PCELL_ID 0x%x !\n",
-			get_id(pi, PERIPH_ID), get_id(pi, PCELL_ID));
-		return -EINVAL;
-	}
-
-	/* Read the configuration of the DMAC */
-	read_dmac_config(pi);
-
-	if (pi->pcfg.num_events == 0) {
-		dev_err(pi->dev, "%s:%d Can't work without events!\n",
-			__func__, __LINE__);
-		return -EINVAL;
-	}
-
-	pl330 = kzalloc(sizeof(*pl330), GFP_KERNEL);
-	if (!pl330) {
-		dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
-			__func__, __LINE__);
-		return -ENOMEM;
-	}
-
-	/* Assign the info structure and private data */
-	pl330->pinfo = pi;
-	pi->pl330_data = pl330;
-
-	spin_lock_init(&pl330->lock);
-
-	INIT_LIST_HEAD(&pl330->req_done);
-
-	/* Use default MC buffer size if not provided */
-	if (!pi->mcbufsz)
-		pi->mcbufsz = MCODE_BUFF_PER_REQ * 2;
-
-	/* Mark all events as free */
-	for (i = 0; i < pi->pcfg.num_events; i++)
-		pl330->events[i] = -1;
-
-	/* Allocate resources needed by the DMAC */
-	ret = dmac_alloc_resources(pl330);
-	if (ret) {
-		dev_err(pi->dev, "Unable to create channels for DMAC\n");
-		kfree(pl330);
-		return ret;
-	}
-
-	tasklet_init(&pl330->tasks, pl330_dotask, (unsigned long) pl330);
-
-	pl330->state = INIT;
-
-	return 0;
-}
-EXPORT_SYMBOL(pl330_add);
-
-static int dmac_free_threads(struct pl330_dmac *pl330)
-{
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
-	struct pl330_thread *thrd;
-	int i;
-
-	/* Release Channel threads */
-	for (i = 0; i < chans; i++) {
-		thrd = &pl330->channels[i];
-		pl330_release_channel((void *)thrd);
-	}
-
-	/* Free memory */
-	kfree(pl330->channels);
-
-	return 0;
-}
-
-static void dmac_free_resources(struct pl330_dmac *pl330)
-{
-	struct pl330_info *pi = pl330->pinfo;
-	int chans = pi->pcfg.num_chan;
-
-	dmac_free_threads(pl330);
-
-	dma_free_coherent(pi->dev, chans * pi->mcbufsz,
-				pl330->mcode_cpu, pl330->mcode_bus);
-}
-
-void pl330_del(struct pl330_info *pi)
-{
-	struct pl330_dmac *pl330;
-
-	if (!pi || !pi->pl330_data)
-		return;
-
-	pl330 = pi->pl330_data;
-
-	pl330->state = UNINIT;
-
-	tasklet_kill(&pl330->tasks);
-
-	/* Free DMAC resources */
-	dmac_free_resources(pl330);
-
-	kfree(pl330);
-	pi->pl330_data = NULL;
-}
-EXPORT_SYMBOL(pl330_del);