[linux-2.6-block.git] / drivers / iommu / msm_iommu_dev.c

/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/iommu.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/slab.h>

#include "msm_iommu_hw-8xxx.h"
#include "msm_iommu.h"

struct iommu_ctx_iter_data {
	/* input */
	const char *name;

	/* output */
	struct device *dev;
};

static struct platform_device *msm_iommu_root_dev;

static int each_iommu_ctx(struct device *dev, void *data)
{
	struct iommu_ctx_iter_data *res = data;
	struct msm_iommu_ctx_dev *c = dev->platform_data;

	if (!res || !c || !c->name || !res->name)
		return -EINVAL;

	if (!strcmp(res->name, c->name)) {
		res->dev = dev;
		return 1;
	}
	return 0;
}

static int each_iommu(struct device *dev, void *data)
{
	return device_for_each_child(dev, data, each_iommu_ctx);
}

struct device *msm_iommu_get_ctx(const char *ctx_name)
{
	struct iommu_ctx_iter_data r;
	int found;

	if (!msm_iommu_root_dev) {
		pr_err("No root IOMMU device.\n");
		goto fail;
	}

	r.name = ctx_name;
	found = device_for_each_child(&msm_iommu_root_dev->dev, &r, each_iommu);

	if (!found) {
		pr_err("Could not find context <%s>\n", ctx_name);
		goto fail;
	}

	return r.dev;
fail:
	return NULL;
}
EXPORT_SYMBOL(msm_iommu_get_ctx);

static void msm_iommu_reset(void __iomem *base, int ncb)
{
	int ctx;

	SET_RPUE(base, 0);
	SET_RPUEIE(base, 0);
	SET_ESRRESTORE(base, 0);
	SET_TBE(base, 0);
	SET_CR(base, 0);
	SET_SPDMBE(base, 0);
	SET_TESTBUSCR(base, 0);
	SET_TLBRSW(base, 0);
	SET_GLOBAL_TLBIALL(base, 0);
	SET_RPU_ACR(base, 0);
	SET_TLBLKCRWE(base, 1);

	for (ctx = 0; ctx < ncb; ctx++) {
		SET_BPRCOSH(base, ctx, 0);
		SET_BPRCISH(base, ctx, 0);
		SET_BPRCNSH(base, ctx, 0);
		SET_BPSHCFG(base, ctx, 0);
		SET_BPMTCFG(base, ctx, 0);
		SET_ACTLR(base, ctx, 0);
		SET_SCTLR(base, ctx, 0);
		SET_FSRRESTORE(base, ctx, 0);
		SET_TTBR0(base, ctx, 0);
		SET_TTBR1(base, ctx, 0);
		SET_TTBCR(base, ctx, 0);
		SET_BFBCR(base, ctx, 0);
		SET_PAR(base, ctx, 0);
		SET_FAR(base, ctx, 0);
		SET_CTX_TLBIALL(base, ctx, 0);
		SET_TLBFLPTER(base, ctx, 0);
		SET_TLBSLPTER(base, ctx, 0);
		SET_TLBLKCR(base, ctx, 0);
		SET_PRRR(base, ctx, 0);
		SET_NMRR(base, ctx, 0);
		SET_CONTEXTIDR(base, ctx, 0);
	}
}

static int msm_iommu_probe(struct platform_device *pdev)
{
	struct resource *r;
	struct clk *iommu_clk;
	struct clk *iommu_pclk;
	struct msm_iommu_drvdata *drvdata;
	struct msm_iommu_dev *iommu_dev = dev_get_platdata(&pdev->dev);
	void __iomem *regs_base;
	int ret, irq, par;

	if (pdev->id == -1) {
		msm_iommu_root_dev = pdev;
		return 0;
	}

	drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);

	if (!drvdata) {
		ret = -ENOMEM;
		goto fail;
	}

	if (!iommu_dev) {
		ret = -ENODEV;
		goto fail;
	}

	iommu_pclk = clk_get(NULL, "smmu_pclk");
	if (IS_ERR(iommu_pclk)) {
		ret = -ENODEV;
		goto fail;
	}

	ret = clk_prepare_enable(iommu_pclk);
	if (ret)
		goto fail_enable;

	iommu_clk = clk_get(&pdev->dev, "iommu_clk");

	if (!IS_ERR(iommu_clk))	{
		if (clk_get_rate(iommu_clk) == 0)
			clk_set_rate(iommu_clk, 1);

		ret = clk_prepare_enable(iommu_clk);
		if (ret) {
			clk_put(iommu_clk);
			goto fail_pclk;
		}
	} else
		iommu_clk = NULL;

	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase");
	regs_base = devm_ioremap_resource(&pdev->dev, r);
	if (IS_ERR(regs_base)) {
		ret = PTR_ERR(regs_base);
		goto fail_clk;
	}

	irq = platform_get_irq_byname(pdev, "secure_irq");
	if (irq < 0) {
		ret = -ENODEV;
		goto fail_clk;
	}

	msm_iommu_reset(regs_base, iommu_dev->ncb);

	SET_M(regs_base, 0, 1);
	SET_PAR(regs_base, 0, 0);
	SET_V2PCFG(regs_base, 0, 1);
	SET_V2PPR(regs_base, 0, 0);
	par = GET_PAR(regs_base, 0);
	SET_V2PCFG(regs_base, 0, 0);
	SET_M(regs_base, 0, 0);

	if (!par) {
		pr_err("%s: Invalid PAR value detected\n", iommu_dev->name);
		ret = -ENODEV;
		goto fail_clk;
	}

	ret = request_irq(irq, msm_iommu_fault_handler, 0,
			"msm_iommu_secure_irpt_handler", drvdata);
	if (ret) {
		pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
		goto fail_clk;
	}


	drvdata->pclk = iommu_pclk;
	drvdata->clk = iommu_clk;
	drvdata->base = regs_base;
	drvdata->irq = irq;
	drvdata->ncb = iommu_dev->ncb;

	pr_info("device %s mapped at %p, irq %d with %d ctx banks\n",
		iommu_dev->name, regs_base, irq, iommu_dev->ncb);

	platform_set_drvdata(pdev, drvdata);

	clk_disable(iommu_clk);

	clk_disable(iommu_pclk);

	return 0;
fail_clk:
	if (iommu_clk) {
		clk_disable(iommu_clk);
		clk_put(iommu_clk);
	}
fail_pclk:
	clk_disable_unprepare(iommu_pclk);
fail_enable:
	clk_put(iommu_pclk);
fail:
	kfree(drvdata);
	return ret;
}

static int msm_iommu_remove(struct platform_device *pdev)
{
	struct msm_iommu_drvdata *drv = NULL;

	drv = platform_get_drvdata(pdev);
	if (drv) {
		if (drv->clk) {
			clk_unprepare(drv->clk);
			clk_put(drv->clk);
		}
		clk_unprepare(drv->pclk);
		clk_put(drv->pclk);
		memset(drv, 0, sizeof(*drv));
		kfree(drv);
	}
	return 0;
}

static int msm_iommu_ctx_probe(struct platform_device *pdev)
{
	struct msm_iommu_ctx_dev *c = dev_get_platdata(&pdev->dev);
	struct msm_iommu_drvdata *drvdata;
	struct msm_iommu_ctx_drvdata *ctx_drvdata;
	int i, ret;

	if (!c || !pdev->dev.parent)
		return -EINVAL;

	drvdata = dev_get_drvdata(pdev->dev.parent);
	if (!drvdata)
		return -ENODEV;

	ctx_drvdata = kzalloc(sizeof(*ctx_drvdata), GFP_KERNEL);
	if (!ctx_drvdata)
		return -ENOMEM;

	ctx_drvdata->num = c->num;
	ctx_drvdata->pdev = pdev;

	INIT_LIST_HEAD(&ctx_drvdata->attached_elm);
	platform_set_drvdata(pdev, ctx_drvdata);

	ret = clk_prepare_enable(drvdata->pclk);
	if (ret)
		goto fail;

	if (drvdata->clk) {
		ret = clk_prepare_enable(drvdata->clk);
		if (ret) {
			clk_disable_unprepare(drvdata->pclk);
			goto fail;
		}
	}

	/* Program the M2V tables for this context */
	for (i = 0; i < MAX_NUM_MIDS; i++) {
		int mid = c->mids[i];
		if (mid == -1)
			break;

		SET_M2VCBR_N(drvdata->base, mid, 0);
		SET_CBACR_N(drvdata->base, c->num, 0);

		/* Set VMID = 0 */
		SET_VMID(drvdata->base, mid, 0);

		/* Set the context number for that MID to this context */
		SET_CBNDX(drvdata->base, mid, c->num);

		/* Set MID associated with this context bank to 0*/
		SET_CBVMID(drvdata->base, c->num, 0);

		/* Set the ASID for TLB tagging for this context */
		SET_CONTEXTIDR_ASID(drvdata->base, c->num, c->num);

		/* Set security bit override to be Non-secure */
		SET_NSCFG(drvdata->base, mid, 3);
	}

	clk_disable(drvdata->clk);
	clk_disable(drvdata->pclk);

	dev_info(&pdev->dev, "context %s using bank %d\n", c->name, c->num);
	return 0;
fail:
	kfree(ctx_drvdata);
	return ret;
}

static int msm_iommu_ctx_remove(struct platform_device *pdev)
{
	struct msm_iommu_ctx_drvdata *drv = NULL;
	drv = platform_get_drvdata(pdev);
	if (drv) {
		memset(drv, 0, sizeof(struct msm_iommu_ctx_drvdata));
		kfree(drv);
	}
	return 0;
}

static struct platform_driver msm_iommu_driver = {
	.driver = {
		.name	= "msm_iommu",
	},
	.probe		= msm_iommu_probe,
	.remove		= msm_iommu_remove,
};

static struct platform_driver msm_iommu_ctx_driver = {
	.driver = {
		.name	= "msm_iommu_ctx",
	},
	.probe		= msm_iommu_ctx_probe,
	.remove		= msm_iommu_ctx_remove,
};

static struct platform_driver * const drivers[] = {
	&msm_iommu_driver,
	&msm_iommu_ctx_driver,
};

static int __init msm_iommu_driver_init(void)
{
	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}

static void __exit msm_iommu_driver_exit(void)
{
	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}

subsys_initcall(msm_iommu_driver_init);
module_exit(msm_iommu_driver_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");
Commit	Line	Data
b61401ad	1	/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
c6a5951e SM	2	*
	3	* This program is free software; you can redistribute it and/or modify
	4	* it under the terms of the GNU General Public License version 2 and
	5	* only version 2 as published by the Free Software Foundation.
	6	*
	7	* This program is distributed in the hope that it will be useful,
	8	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	9	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	10	* GNU General Public License for more details.
	11	*
	12	* You should have received a copy of the GNU General Public License
	13	* along with this program; if not, write to the Free Software
	14	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	15	* 02110-1301, USA.
	16	*/
	17
	18	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	19
	20	#include <linux/kernel.h>
	21	#include <linux/module.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/io.h>
	24	#include <linux/clk.h>
	25	#include <linux/iommu.h>
	26	#include <linux/interrupt.h>
	27	#include <linux/err.h>
	28	#include <linux/slab.h>
	29
0b559df5 SB	30	#include "msm_iommu_hw-8xxx.h"
0b559df5 SB	31	#include "msm_iommu.h"
c6a5951e SM	32
	33	struct iommu_ctx_iter_data {
	34	/* input */
	35	const char *name;
	36
	37	/* output */
	38	struct device *dev;
	39	};
	40
	41	static struct platform_device *msm_iommu_root_dev;
	42
	43	static int each_iommu_ctx(struct device dev, void data)
	44	{
	45	struct iommu_ctx_iter_data *res = data;
	46	struct msm_iommu_ctx_dev *c = dev->platform_data;
	47
	48	if (!res \|\| !c \|\| !c->name \|\| !res->name)
	49	return -EINVAL;
	50
	51	if (!strcmp(res->name, c->name)) {
	52	res->dev = dev;
	53	return 1;
	54	}
	55	return 0;
	56	}
	57
	58	static int each_iommu(struct device dev, void data)
	59	{
	60	return device_for_each_child(dev, data, each_iommu_ctx);
	61	}
	62
	63	struct device msm_iommu_get_ctx(const char ctx_name)
	64	{
	65	struct iommu_ctx_iter_data r;
	66	int found;
	67
	68	if (!msm_iommu_root_dev) {
	69	pr_err("No root IOMMU device.\n");
	70	goto fail;
	71	}
	72
	73	r.name = ctx_name;
	74	found = device_for_each_child(&msm_iommu_root_dev->dev, &r, each_iommu);
	75
	76	if (!found) {
	77	pr_err("Could not find context <%s>\n", ctx_name);
	78	goto fail;
	79	}
	80
	81	return r.dev;
	82	fail:
	83	return NULL;
	84	}
	85	EXPORT_SYMBOL(msm_iommu_get_ctx);
	86
a43d8c10	87	static void msm_iommu_reset(void __iomem *base, int ncb)
c6a5951e	88	{
a43d8c10	89	int ctx;
c6a5951e SM	90
	91	SET_RPUE(base, 0);
	92	SET_RPUEIE(base, 0);
	93	SET_ESRRESTORE(base, 0);
	94	SET_TBE(base, 0);
	95	SET_CR(base, 0);
	96	SET_SPDMBE(base, 0);
	97	SET_TESTBUSCR(base, 0);
	98	SET_TLBRSW(base, 0);
	99	SET_GLOBAL_TLBIALL(base, 0);
	100	SET_RPU_ACR(base, 0);
	101	SET_TLBLKCRWE(base, 1);
c6a5951e SM	102
	103	for (ctx = 0; ctx < ncb; ctx++) {
	104	SET_BPRCOSH(base, ctx, 0);
	105	SET_BPRCISH(base, ctx, 0);
	106	SET_BPRCNSH(base, ctx, 0);
	107	SET_BPSHCFG(base, ctx, 0);
	108	SET_BPMTCFG(base, ctx, 0);
	109	SET_ACTLR(base, ctx, 0);
	110	SET_SCTLR(base, ctx, 0);
	111	SET_FSRRESTORE(base, ctx, 0);
	112	SET_TTBR0(base, ctx, 0);
	113	SET_TTBR1(base, ctx, 0);
	114	SET_TTBCR(base, ctx, 0);
	115	SET_BFBCR(base, ctx, 0);
	116	SET_PAR(base, ctx, 0);
	117	SET_FAR(base, ctx, 0);
	118	SET_CTX_TLBIALL(base, ctx, 0);
	119	SET_TLBFLPTER(base, ctx, 0);
	120	SET_TLBSLPTER(base, ctx, 0);
	121	SET_TLBLKCR(base, ctx, 0);
	122	SET_PRRR(base, ctx, 0);
	123	SET_NMRR(base, ctx, 0);
	124	SET_CONTEXTIDR(base, ctx, 0);
	125	}
	126	}
	127
	128	static int msm_iommu_probe(struct platform_device *pdev)
	129	{
afba256b	130	struct resource *r;
c6a5951e	131	struct clk *iommu_clk;
b61401ad	132	struct clk *iommu_pclk;
c6a5951e	133	struct msm_iommu_drvdata *drvdata;
263bc3fd	134	struct msm_iommu_dev *iommu_dev = dev_get_platdata(&pdev->dev);
c6a5951e	135	void __iomem *regs_base;
a43d8c10	136	int ret, irq, par;
c6a5951e	137
b61401ad SM	138	if (pdev->id == -1) {
	139	msm_iommu_root_dev = pdev;
	140	return 0;
	141	}
c6a5951e	142
b61401ad	143	drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
c6a5951e	144
b61401ad SM	145	if (!drvdata) {
	146	ret = -ENOMEM;
	147	goto fail;
	148	}
	149
	150	if (!iommu_dev) {
	151	ret = -ENODEV;
	152	goto fail;
	153	}
c6a5951e	154
b61401ad SM	155	iommu_pclk = clk_get(NULL, "smmu_pclk");
	156	if (IS_ERR(iommu_pclk)) {
	157	ret = -ENODEV;
	158	goto fail;
	159	}
	160
1107b171	161	ret = clk_prepare_enable(iommu_pclk);
b61401ad SM	162	if (ret)
	163	goto fail_enable;
	164
	165	iommu_clk = clk_get(&pdev->dev, "iommu_clk");
	166
	167	if (!IS_ERR(iommu_clk)) {
	168	if (clk_get_rate(iommu_clk) == 0)
8d214153	169	clk_set_rate(iommu_clk, 1);
b61401ad	170
1107b171	171	ret = clk_prepare_enable(iommu_clk);
b61401ad	172	if (ret) {
c6a5951e	173	clk_put(iommu_clk);
b61401ad	174	goto fail_pclk;
c6a5951e	175	}
b61401ad SM	176	} else
b61401ad SM	177	iommu_clk = NULL;
c6a5951e	178
b61401ad	179	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "physbase");
afba256b KW	180	regs_base = devm_ioremap_resource(&pdev->dev, r);
	181	if (IS_ERR(regs_base)) {
	182	ret = PTR_ERR(regs_base);
b61401ad SM	183	goto fail_clk;
b61401ad SM	184	}
c6a5951e	185
b61401ad SM	186	irq = platform_get_irq_byname(pdev, "secure_irq");
	187	if (irq < 0) {
	188	ret = -ENODEV;
afba256b	189	goto fail_clk;
b61401ad	190	}
c6a5951e	191
a43d8c10	192	msm_iommu_reset(regs_base, iommu_dev->ncb);
c6a5951e	193
a43d8c10 SM	194	SET_M(regs_base, 0, 1);
	195	SET_PAR(regs_base, 0, 0);
	196	SET_V2PCFG(regs_base, 0, 1);
	197	SET_V2PPR(regs_base, 0, 0);
	198	par = GET_PAR(regs_base, 0);
	199	SET_V2PCFG(regs_base, 0, 0);
	200	SET_M(regs_base, 0, 0);
	201
	202	if (!par) {
	203	pr_err("%s: Invalid PAR value detected\n", iommu_dev->name);
b61401ad	204	ret = -ENODEV;
afba256b	205	goto fail_clk;
b61401ad	206	}
c6a5951e	207
b61401ad SM	208	ret = request_irq(irq, msm_iommu_fault_handler, 0,
	209	"msm_iommu_secure_irpt_handler", drvdata);
	210	if (ret) {
	211	pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
afba256b	212	goto fail_clk;
b61401ad	213	}
c6a5951e	214
a43d8c10	215
b61401ad SM	216	drvdata->pclk = iommu_pclk;
	217	drvdata->clk = iommu_clk;
	218	drvdata->base = regs_base;
	219	drvdata->irq = irq;
a43d8c10	220	drvdata->ncb = iommu_dev->ncb;
c6a5951e	221
b61401ad	222	pr_info("device %s mapped at %p, irq %d with %d ctx banks\n",
a43d8c10	223	iommu_dev->name, regs_base, irq, iommu_dev->ncb);
c6a5951e	224
b61401ad	225	platform_set_drvdata(pdev, drvdata);
c6a5951e	226
c72acf69	227	clk_disable(iommu_clk);
b61401ad SM	228
b61401ad SM	229	clk_disable(iommu_pclk);
c6a5951e	230
b61401ad	231	return 0;
b61401ad SM	232	fail_clk:
	233	if (iommu_clk) {
	234	clk_disable(iommu_clk);
	235	clk_put(iommu_clk);
	236	}
	237	fail_pclk:
1107b171	238	clk_disable_unprepare(iommu_pclk);
b61401ad SM	239	fail_enable:
b61401ad SM	240	clk_put(iommu_pclk);
c6a5951e SM	241	fail:
	242	kfree(drvdata);
	243	return ret;
	244	}
	245
	246	static int msm_iommu_remove(struct platform_device *pdev)
	247	{
	248	struct msm_iommu_drvdata *drv = NULL;
	249
	250	drv = platform_get_drvdata(pdev);
	251	if (drv) {
1107b171 SB	252	if (drv->clk) {
1107b171 SB	253	clk_unprepare(drv->clk);
b61401ad	254	clk_put(drv->clk);
1107b171 SB	255	}
1107b171 SB	256	clk_unprepare(drv->pclk);
b61401ad SM	257	clk_put(drv->pclk);
b61401ad SM	258	memset(drv, 0, sizeof(*drv));
c6a5951e	259	kfree(drv);
c6a5951e SM	260	}
	261	return 0;
	262	}
	263
	264	static int msm_iommu_ctx_probe(struct platform_device *pdev)
	265	{
263bc3fd	266	struct msm_iommu_ctx_dev *c = dev_get_platdata(&pdev->dev);
c6a5951e	267	struct msm_iommu_drvdata *drvdata;
34e3a58c	268	struct msm_iommu_ctx_drvdata *ctx_drvdata;
b61401ad	269	int i, ret;
c6a5951e	270
34e3a58c LC	271	if (!c \|\| !pdev->dev.parent)
34e3a58c LC	272	return -EINVAL;
c6a5951e	273
34e3a58c LC	274	drvdata = dev_get_drvdata(pdev->dev.parent);
	275	if (!drvdata)
	276	return -ENODEV;
c6a5951e SM	277
c6a5951e SM	278	ctx_drvdata = kzalloc(sizeof(*ctx_drvdata), GFP_KERNEL);
34e3a58c LC	279	if (!ctx_drvdata)
	280	return -ENOMEM;
	281
c6a5951e SM	282	ctx_drvdata->num = c->num;
	283	ctx_drvdata->pdev = pdev;
	284
	285	INIT_LIST_HEAD(&ctx_drvdata->attached_elm);
	286	platform_set_drvdata(pdev, ctx_drvdata);
	287
1107b171	288	ret = clk_prepare_enable(drvdata->pclk);
b61401ad SM	289	if (ret)
	290	goto fail;
	291
	292	if (drvdata->clk) {
1107b171	293	ret = clk_prepare_enable(drvdata->clk);
b61401ad	294	if (ret) {
1107b171	295	clk_disable_unprepare(drvdata->pclk);
b61401ad SM	296	goto fail;
	297	}
	298	}
	299
c6a5951e SM	300	/* Program the M2V tables for this context */
	301	for (i = 0; i < MAX_NUM_MIDS; i++) {
	302	int mid = c->mids[i];
	303	if (mid == -1)
	304	break;
	305
	306	SET_M2VCBR_N(drvdata->base, mid, 0);
	307	SET_CBACR_N(drvdata->base, c->num, 0);
	308
2e8c8ba9 SM	309	/* Set VMID = 0 */
2e8c8ba9 SM	310	SET_VMID(drvdata->base, mid, 0);
c6a5951e SM	311
	312	/* Set the context number for that MID to this context */
	313	SET_CBNDX(drvdata->base, mid, c->num);
	314
2e8c8ba9 SM	315	/* Set MID associated with this context bank to 0*/
	316	SET_CBVMID(drvdata->base, c->num, 0);
	317
	318	/* Set the ASID for TLB tagging for this context */
	319	SET_CONTEXTIDR_ASID(drvdata->base, c->num, c->num);
c6a5951e SM	320
	321	/* Set security bit override to be Non-secure */
	322	SET_NSCFG(drvdata->base, mid, 3);
	323	}
	324
c72acf69	325	clk_disable(drvdata->clk);
b61401ad	326	clk_disable(drvdata->pclk);
c6a5951e	327
b61401ad	328	dev_info(&pdev->dev, "context %s using bank %d\n", c->name, c->num);
c6a5951e SM	329	return 0;
	330	fail:
	331	kfree(ctx_drvdata);
	332	return ret;
	333	}
	334
	335	static int msm_iommu_ctx_remove(struct platform_device *pdev)
	336	{
	337	struct msm_iommu_ctx_drvdata *drv = NULL;
	338	drv = platform_get_drvdata(pdev);
	339	if (drv) {
	340	memset(drv, 0, sizeof(struct msm_iommu_ctx_drvdata));
	341	kfree(drv);
c6a5951e SM	342	}
	343	return 0;
	344	}
	345
	346	static struct platform_driver msm_iommu_driver = {
	347	.driver = {
	348	.name = "msm_iommu",
	349	},
	350	.probe = msm_iommu_probe,
	351	.remove = msm_iommu_remove,
	352	};
	353
	354	static struct platform_driver msm_iommu_ctx_driver = {
	355	.driver = {
	356	.name = "msm_iommu_ctx",
	357	},
	358	.probe = msm_iommu_ctx_probe,
	359	.remove = msm_iommu_ctx_remove,
	360	};
	361
e7479a19 TR	362	static struct platform_driver * const drivers[] = {
	363	&msm_iommu_driver,
	364	&msm_iommu_ctx_driver,
	365	};
	366
516cbc79	367	static int __init msm_iommu_driver_init(void)
c6a5951e	368	{
e7479a19	369	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
c6a5951e SM	370	}
c6a5951e SM	371
516cbc79	372	static void __exit msm_iommu_driver_exit(void)
c6a5951e	373	{
e7479a19	374	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
c6a5951e SM	375	}
	376
	377	subsys_initcall(msm_iommu_driver_init);
	378	module_exit(msm_iommu_driver_exit);
	379
	380	MODULE_LICENSE("GPL v2");
	381	MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");