[thirdparty/kernel/stable.git] / drivers / edac / ti_edac.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
 *
 * Texas Instruments DDR3 ECC error correction and detection driver
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/init.h>
#include <linux/edac.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/module.h>

#include "edac_module.h"

/* EMIF controller registers */
#define EMIF_SDRAM_CONFIG		0x008
#define EMIF_IRQ_STATUS			0x0ac
#define EMIF_IRQ_ENABLE_SET		0x0b4
#define EMIF_ECC_CTRL			0x110
#define EMIF_1B_ECC_ERR_CNT		0x130
#define EMIF_1B_ECC_ERR_THRSH		0x134
#define EMIF_1B_ECC_ERR_ADDR_LOG	0x13c
#define EMIF_2B_ECC_ERR_ADDR_LOG	0x140

/* Bit definitions for EMIF_SDRAM_CONFIG */
#define SDRAM_TYPE_SHIFT		29
#define SDRAM_TYPE_MASK			GENMASK(31, 29)
#define SDRAM_TYPE_DDR3			(3 << SDRAM_TYPE_SHIFT)
#define SDRAM_TYPE_DDR2			(2 << SDRAM_TYPE_SHIFT)
#define SDRAM_NARROW_MODE_MASK		GENMASK(15, 14)
#define SDRAM_K2_NARROW_MODE_SHIFT	12
#define SDRAM_K2_NARROW_MODE_MASK	GENMASK(13, 12)
#define SDRAM_ROWSIZE_SHIFT		7
#define SDRAM_ROWSIZE_MASK		GENMASK(9, 7)
#define SDRAM_IBANK_SHIFT		4
#define SDRAM_IBANK_MASK		GENMASK(6, 4)
#define SDRAM_K2_IBANK_SHIFT		5
#define SDRAM_K2_IBANK_MASK		GENMASK(6, 5)
#define SDRAM_K2_EBANK_SHIFT		3
#define SDRAM_K2_EBANK_MASK		BIT(SDRAM_K2_EBANK_SHIFT)
#define SDRAM_PAGESIZE_SHIFT		0
#define SDRAM_PAGESIZE_MASK		GENMASK(2, 0)
#define SDRAM_K2_PAGESIZE_SHIFT		0
#define SDRAM_K2_PAGESIZE_MASK		GENMASK(1, 0)

#define EMIF_1B_ECC_ERR_THRSH_SHIFT	24

/* IRQ bit definitions */
#define EMIF_1B_ECC_ERR			BIT(5)
#define EMIF_2B_ECC_ERR			BIT(4)
#define EMIF_WR_ECC_ERR			BIT(3)
#define EMIF_SYS_ERR			BIT(0)
/* Bit 31 enables ECC and 28 enables RMW */
#define ECC_ENABLED			(BIT(31) | BIT(28))

#define EDAC_MOD_NAME			"ti-emif-edac"

enum {
	EMIF_TYPE_DRA7,
	EMIF_TYPE_K2
};

struct ti_edac {
	void __iomem *reg;
};

static u32 ti_edac_readl(struct ti_edac *edac, u16 offset)
{
	return readl_relaxed(edac->reg + offset);
}

static void ti_edac_writel(struct ti_edac *edac, u32 val, u16 offset)
{
	writel_relaxed(val, edac->reg + offset);
}

static irqreturn_t ti_edac_isr(int irq, void *data)
{
	struct mem_ctl_info *mci = data;
	struct ti_edac *edac = mci->pvt_info;
	u32 irq_status;
	u32 err_addr;
	int err_count;

	irq_status = ti_edac_readl(edac, EMIF_IRQ_STATUS);

	if (irq_status & EMIF_1B_ECC_ERR) {
		err_addr = ti_edac_readl(edac, EMIF_1B_ECC_ERR_ADDR_LOG);
		err_count = ti_edac_readl(edac, EMIF_1B_ECC_ERR_CNT);
		ti_edac_writel(edac, err_count, EMIF_1B_ECC_ERR_CNT);
		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, err_count,
				     err_addr >> PAGE_SHIFT,
				     err_addr & ~PAGE_MASK, -1, 0, 0, 0,
				     mci->ctl_name, "1B");
	}

	if (irq_status & EMIF_2B_ECC_ERR) {
		err_addr = ti_edac_readl(edac, EMIF_2B_ECC_ERR_ADDR_LOG);
		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
				     err_addr >> PAGE_SHIFT,
				     err_addr & ~PAGE_MASK, -1, 0, 0, 0,
				     mci->ctl_name, "2B");
	}

	if (irq_status & EMIF_WR_ECC_ERR)
		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
				     0, 0, -1, 0, 0, 0,
				     mci->ctl_name, "WR");

	ti_edac_writel(edac, irq_status, EMIF_IRQ_STATUS);

	return IRQ_HANDLED;
}

static void ti_edac_setup_dimm(struct mem_ctl_info *mci, u32 type)
{
	struct dimm_info *dimm;
	struct ti_edac *edac = mci->pvt_info;
	int bits;
	u32 val;
	u32 memsize;

	dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, 0, 0, 0);

	val = ti_edac_readl(edac, EMIF_SDRAM_CONFIG);

	if (type == EMIF_TYPE_DRA7) {
		bits = ((val & SDRAM_PAGESIZE_MASK) >> SDRAM_PAGESIZE_SHIFT) + 8;
		bits += ((val & SDRAM_ROWSIZE_MASK) >> SDRAM_ROWSIZE_SHIFT) + 9;
		bits += (val & SDRAM_IBANK_MASK) >> SDRAM_IBANK_SHIFT;

		if (val & SDRAM_NARROW_MODE_MASK) {
			bits++;
			dimm->dtype = DEV_X16;
		} else {
			bits += 2;
			dimm->dtype = DEV_X32;
		}
	} else {
		bits = 16;
		bits += ((val & SDRAM_K2_PAGESIZE_MASK) >>
			SDRAM_K2_PAGESIZE_SHIFT) + 8;
		bits += (val & SDRAM_K2_IBANK_MASK) >> SDRAM_K2_IBANK_SHIFT;
		bits += (val & SDRAM_K2_EBANK_MASK) >> SDRAM_K2_EBANK_SHIFT;

		val = (val & SDRAM_K2_NARROW_MODE_MASK) >>
			SDRAM_K2_NARROW_MODE_SHIFT;
		switch (val) {
		case 0:
			bits += 3;
			dimm->dtype = DEV_X64;
			break;
		case 1:
			bits += 2;
			dimm->dtype = DEV_X32;
			break;
		case 2:
			bits++;
			dimm->dtype = DEV_X16;
			break;
		}
	}

	memsize = 1 << bits;

	dimm->nr_pages = memsize >> PAGE_SHIFT;
	dimm->grain = 4;
	if ((val & SDRAM_TYPE_MASK) == SDRAM_TYPE_DDR2)
		dimm->mtype = MEM_DDR2;
	else
		dimm->mtype = MEM_DDR3;

	val = ti_edac_readl(edac, EMIF_ECC_CTRL);
	if (val & ECC_ENABLED)
		dimm->edac_mode = EDAC_SECDED;
	else
		dimm->edac_mode = EDAC_NONE;
}

static const struct of_device_id ti_edac_of_match[] = {
	{ .compatible = "ti,emif-keystone", .data = (void *)EMIF_TYPE_K2 },
	{ .compatible = "ti,emif-dra7xx", .data = (void *)EMIF_TYPE_DRA7 },
	{},
};

static int _emif_get_id(struct device_node *node)
{
	struct device_node *np;
	const __be32 *addrp;
	u32 addr, my_addr;
	int my_id = 0;

	addrp = of_get_address(node, 0, NULL, NULL);
	my_addr = (u32)of_translate_address(node, addrp);

	for_each_matching_node(np, ti_edac_of_match) {
		if (np == node)
			continue;

		addrp = of_get_address(np, 0, NULL, NULL);
		addr = (u32)of_translate_address(np, addrp);

		edac_printk(KERN_INFO, EDAC_MOD_NAME,
			    "addr=%x, my_addr=%x\n",
			    addr, my_addr);

		if (addr < my_addr)
			my_id++;
	}

	return my_id;
}

static int ti_edac_probe(struct platform_device *pdev)
{
	int error_irq = 0, ret = -ENODEV;
	struct device *dev = &pdev->dev;
	struct resource *res;
	void __iomem *reg;
	struct mem_ctl_info *mci;
	struct edac_mc_layer layers[1];
	const struct of_device_id *id;
	struct ti_edac *edac;
	int emif_id;

	id = of_match_device(ti_edac_of_match, &pdev->dev);
	if (!id)
		return -ENODEV;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	reg = devm_ioremap_resource(dev, res);
	if (IS_ERR(reg)) {
		edac_printk(KERN_ERR, EDAC_MOD_NAME,
			    "EMIF controller regs not defined\n");
		return PTR_ERR(reg);
	}

	layers[0].type = EDAC_MC_LAYER_ALL_MEM;
	layers[0].size = 1;

	/* Allocate ID number for our EMIF controller */
	emif_id = _emif_get_id(pdev->dev.of_node);
	if (emif_id < 0)
		return -EINVAL;

	mci = edac_mc_alloc(emif_id, 1, layers, sizeof(*edac));
	if (!mci)
		return -ENOMEM;

	mci->pdev = &pdev->dev;
	edac = mci->pvt_info;
	edac->reg = reg;
	platform_set_drvdata(pdev, mci);

	mci->mtype_cap = MEM_FLAG_DDR3 | MEM_FLAG_DDR2;
	mci->edac_ctl_cap = EDAC_FLAG_SECDED | EDAC_FLAG_NONE;
	mci->mod_name = EDAC_MOD_NAME;
	mci->ctl_name = id->compatible;
	mci->dev_name = dev_name(&pdev->dev);

	/* Setup memory layout */
	ti_edac_setup_dimm(mci, (u32)(id->data));

	/* add EMIF ECC error handler */
	error_irq = platform_get_irq(pdev, 0);
	if (!error_irq) {
		edac_printk(KERN_ERR, EDAC_MOD_NAME,
			    "EMIF irq number not defined.\n");
		goto err;
	}

	ret = devm_request_irq(dev, error_irq, ti_edac_isr, 0,
			       "emif-edac-irq", mci);
	if (ret) {
		edac_printk(KERN_ERR, EDAC_MOD_NAME,
			    "request_irq fail for EMIF EDAC irq\n");
		goto err;
	}

	ret = edac_mc_add_mc(mci);
	if (ret) {
		edac_printk(KERN_ERR, EDAC_MOD_NAME,
			    "Failed to register mci: %d.\n", ret);
		goto err;
	}

	/* Generate an interrupt with each 1b error */
	ti_edac_writel(edac, 1 << EMIF_1B_ECC_ERR_THRSH_SHIFT,
		       EMIF_1B_ECC_ERR_THRSH);

	/* Enable interrupts */
	ti_edac_writel(edac,
		       EMIF_1B_ECC_ERR | EMIF_2B_ECC_ERR | EMIF_WR_ECC_ERR,
		       EMIF_IRQ_ENABLE_SET);

	return 0;

err:
	edac_mc_free(mci);
	return ret;
}

static int ti_edac_remove(struct platform_device *pdev)
{
	struct mem_ctl_info *mci = platform_get_drvdata(pdev);

	edac_mc_del_mc(&pdev->dev);
	edac_mc_free(mci);

	return 0;
}

static struct platform_driver ti_edac_driver = {
	.probe = ti_edac_probe,
	.remove = ti_edac_remove,
	.driver = {
		   .name = EDAC_MOD_NAME,
		   .of_match_table = ti_edac_of_match,
	},
};

module_platform_driver(ti_edac_driver);

MODULE_AUTHOR("Texas Instruments Inc.");
MODULE_DESCRIPTION("EDAC Driver for Texas Instruments DDR3 MC");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
86a18ee2 TK	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
	4	*
	5	* Texas Instruments DDR3 ECC error correction and detection driver
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms and conditions of the GNU General Public License,
	9	* version 2, as published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <linux/init.h>
	21	#include <linux/edac.h>
	22	#include <linux/io.h>
	23	#include <linux/interrupt.h>
	24	#include <linux/of_address.h>
	25	#include <linux/of_device.h>
	26	#include <linux/module.h>
	27
	28	#include "edac_module.h"
	29
	30	/* EMIF controller registers */
	31	#define EMIF_SDRAM_CONFIG 0x008
	32	#define EMIF_IRQ_STATUS 0x0ac
	33	#define EMIF_IRQ_ENABLE_SET 0x0b4
	34	#define EMIF_ECC_CTRL 0x110
	35	#define EMIF_1B_ECC_ERR_CNT 0x130
	36	#define EMIF_1B_ECC_ERR_THRSH 0x134
	37	#define EMIF_1B_ECC_ERR_ADDR_LOG 0x13c
	38	#define EMIF_2B_ECC_ERR_ADDR_LOG 0x140
	39
	40	/* Bit definitions for EMIF_SDRAM_CONFIG */
	41	#define SDRAM_TYPE_SHIFT 29
	42	#define SDRAM_TYPE_MASK GENMASK(31, 29)
	43	#define SDRAM_TYPE_DDR3 (3 << SDRAM_TYPE_SHIFT)
	44	#define SDRAM_TYPE_DDR2 (2 << SDRAM_TYPE_SHIFT)
	45	#define SDRAM_NARROW_MODE_MASK GENMASK(15, 14)
	46	#define SDRAM_K2_NARROW_MODE_SHIFT 12
	47	#define SDRAM_K2_NARROW_MODE_MASK GENMASK(13, 12)
	48	#define SDRAM_ROWSIZE_SHIFT 7
	49	#define SDRAM_ROWSIZE_MASK GENMASK(9, 7)
	50	#define SDRAM_IBANK_SHIFT 4
	51	#define SDRAM_IBANK_MASK GENMASK(6, 4)
	52	#define SDRAM_K2_IBANK_SHIFT 5
	53	#define SDRAM_K2_IBANK_MASK GENMASK(6, 5)
	54	#define SDRAM_K2_EBANK_SHIFT 3
	55	#define SDRAM_K2_EBANK_MASK BIT(SDRAM_K2_EBANK_SHIFT)
	56	#define SDRAM_PAGESIZE_SHIFT 0
	57	#define SDRAM_PAGESIZE_MASK GENMASK(2, 0)
	58	#define SDRAM_K2_PAGESIZE_SHIFT 0
	59	#define SDRAM_K2_PAGESIZE_MASK GENMASK(1, 0)
	60
	61	#define EMIF_1B_ECC_ERR_THRSH_SHIFT 24
	62
	63	/* IRQ bit definitions */
	64	#define EMIF_1B_ECC_ERR BIT(5)
65	#define EMIF_2B_ECC_ERR BIT(4)
66	#define EMIF_WR_ECC_ERR BIT(3)
67	#define EMIF_SYS_ERR BIT(0)
68	/* Bit 31 enables ECC and 28 enables RMW */
69	#define ECC_ENABLED (BIT(31) \| BIT(28))
70
71	#define EDAC_MOD_NAME "ti-emif-edac"
72
73	enum {
74	EMIF_TYPE_DRA7,
75	EMIF_TYPE_K2
76	};
77
78	struct ti_edac {
79	void __iomem *reg;
80	};
81
82	static u32 ti_edac_readl(struct ti_edac *edac, u16 offset)
83	{
84	return readl_relaxed(edac->reg + offset);
85	}
86
87	static void ti_edac_writel(struct ti_edac *edac, u32 val, u16 offset)
88	{
89	writel_relaxed(val, edac->reg + offset);
90	}
91
92	static irqreturn_t ti_edac_isr(int irq, void *data)
93	{
94	struct mem_ctl_info *mci = data;
95	struct ti_edac *edac = mci->pvt_info;
96	u32 irq_status;
97	u32 err_addr;
98	int err_count;
99
100	irq_status = ti_edac_readl(edac, EMIF_IRQ_STATUS);
101
102	if (irq_status & EMIF_1B_ECC_ERR) {
103	err_addr = ti_edac_readl(edac, EMIF_1B_ECC_ERR_ADDR_LOG);
104	err_count = ti_edac_readl(edac, EMIF_1B_ECC_ERR_CNT);
105	ti_edac_writel(edac, err_count, EMIF_1B_ECC_ERR_CNT);
106	edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, err_count,
107	err_addr >> PAGE_SHIFT,
108	err_addr & ~PAGE_MASK, -1, 0, 0, 0,
109	mci->ctl_name, "1B");
110	}
111
112	if (irq_status & EMIF_2B_ECC_ERR) {
113	err_addr = ti_edac_readl(edac, EMIF_2B_ECC_ERR_ADDR_LOG);
114	edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
115	err_addr >> PAGE_SHIFT,
116	err_addr & ~PAGE_MASK, -1, 0, 0, 0,
117	mci->ctl_name, "2B");
118	}
119
120	if (irq_status & EMIF_WR_ECC_ERR)
121	edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
122	0, 0, -1, 0, 0, 0,
123	mci->ctl_name, "WR");
124
125	ti_edac_writel(edac, irq_status, EMIF_IRQ_STATUS);
126
127	return IRQ_HANDLED;
128	}
129
130	static void ti_edac_setup_dimm(struct mem_ctl_info *mci, u32 type)
131	{
132	struct dimm_info *dimm;
133	struct ti_edac *edac = mci->pvt_info;
134	int bits;
135	u32 val;
136	u32 memsize;
137
138	dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, 0, 0, 0);
139
140	val = ti_edac_readl(edac, EMIF_SDRAM_CONFIG);
141
142	if (type == EMIF_TYPE_DRA7) {
143	bits = ((val & SDRAM_PAGESIZE_MASK) >> SDRAM_PAGESIZE_SHIFT) + 8;
144	bits += ((val & SDRAM_ROWSIZE_MASK) >> SDRAM_ROWSIZE_SHIFT) + 9;
145	bits += (val & SDRAM_IBANK_MASK) >> SDRAM_IBANK_SHIFT;
146
147	if (val & SDRAM_NARROW_MODE_MASK) {
148	bits++;
149	dimm->dtype = DEV_X16;
150	} else {
151	bits += 2;
152	dimm->dtype = DEV_X32;
153	}
154	} else {
155	bits = 16;
156	bits += ((val & SDRAM_K2_PAGESIZE_MASK) >>
157	SDRAM_K2_PAGESIZE_SHIFT) + 8;
158	bits += (val & SDRAM_K2_IBANK_MASK) >> SDRAM_K2_IBANK_SHIFT;
159	bits += (val & SDRAM_K2_EBANK_MASK) >> SDRAM_K2_EBANK_SHIFT;
160
161	val = (val & SDRAM_K2_NARROW_MODE_MASK) >>
162	SDRAM_K2_NARROW_MODE_SHIFT;
163	switch (val) {
164	case 0:
165	bits += 3;
166	dimm->dtype = DEV_X64;
167	break;
168	case 1:
169	bits += 2;
170	dimm->dtype = DEV_X32;
171	break;
172	case 2:
173	bits++;
174	dimm->dtype = DEV_X16;
175	break;
176	}
177	}
178
179	memsize = 1 << bits;
180
181	dimm->nr_pages = memsize >> PAGE_SHIFT;
182	dimm->grain = 4;
183	if ((val & SDRAM_TYPE_MASK) == SDRAM_TYPE_DDR2)
184	dimm->mtype = MEM_DDR2;
185	else
186	dimm->mtype = MEM_DDR3;
187
188	val = ti_edac_readl(edac, EMIF_ECC_CTRL);
189	if (val & ECC_ENABLED)
190	dimm->edac_mode = EDAC_SECDED;
191	else
192	dimm->edac_mode = EDAC_NONE;
193	}
194
195	static const struct of_device_id ti_edac_of_match[] = {
196	{ .compatible = "ti,emif-keystone", .data = (void *)EMIF_TYPE_K2 },
197	{ .compatible = "ti,emif-dra7xx", .data = (void *)EMIF_TYPE_DRA7 },
198	{},
199	};
200
201	static int _emif_get_id(struct device_node *node)
202	{
203	struct device_node *np;
204	const __be32 *addrp;
205	u32 addr, my_addr;
206	int my_id = 0;
207
208	addrp = of_get_address(node, 0, NULL, NULL);
209	my_addr = (u32)of_translate_address(node, addrp);
210
211	for_each_matching_node(np, ti_edac_of_match) {
212	if (np == node)
213	continue;
214
215	addrp = of_get_address(np, 0, NULL, NULL);
216	addr = (u32)of_translate_address(np, addrp);
217
218	edac_printk(KERN_INFO, EDAC_MOD_NAME,
219	"addr=%x, my_addr=%x\n",
220	addr, my_addr);
221
222	if (addr < my_addr)
223	my_id++;
224	}
225
226	return my_id;
227	}
228
229	static int ti_edac_probe(struct platform_device *pdev)
230	{
231	int error_irq = 0, ret = -ENODEV;
232	struct device *dev = &pdev->dev;
233	struct resource *res;
234	void __iomem *reg;
235	struct mem_ctl_info *mci;
236	struct edac_mc_layer layers[1];
237	const struct of_device_id *id;
238	struct ti_edac *edac;
239	int emif_id;
240
241	id = of_match_device(ti_edac_of_match, &pdev->dev);
242	if (!id)
243	return -ENODEV;
244
245	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
246	reg = devm_ioremap_resource(dev, res);
247	if (IS_ERR(reg)) {
248	edac_printk(KERN_ERR, EDAC_MOD_NAME,
249	"EMIF controller regs not defined\n");
250	return PTR_ERR(reg);
251	}
252
253	layers[0].type = EDAC_MC_LAYER_ALL_MEM;
254	layers[0].size = 1;
255
256	/* Allocate ID number for our EMIF controller */
257	emif_id = _emif_get_id(pdev->dev.of_node);
258	if (emif_id < 0)
259	return -EINVAL;
260
261	mci = edac_mc_alloc(emif_id, 1, layers, sizeof(*edac));
262	if (!mci)
263	return -ENOMEM;
264
265	mci->pdev = &pdev->dev;
266	edac = mci->pvt_info;
267	edac->reg = reg;
268	platform_set_drvdata(pdev, mci);
269
270	mci->mtype_cap = MEM_FLAG_DDR3 \| MEM_FLAG_DDR2;
271	mci->edac_ctl_cap = EDAC_FLAG_SECDED \| EDAC_FLAG_NONE;
272	mci->mod_name = EDAC_MOD_NAME;
273	mci->ctl_name = id->compatible;
274	mci->dev_name = dev_name(&pdev->dev);
275
276	/* Setup memory layout */
277	ti_edac_setup_dimm(mci, (u32)(id->data));
278
279	/* add EMIF ECC error handler */
280	error_irq = platform_get_irq(pdev, 0);
281	if (!error_irq) {
282	edac_printk(KERN_ERR, EDAC_MOD_NAME,
283	"EMIF irq number not defined.\n");
284	goto err;
285	}
286
287	ret = devm_request_irq(dev, error_irq, ti_edac_isr, 0,
288	"emif-edac-irq", mci);
289	if (ret) {
290	edac_printk(KERN_ERR, EDAC_MOD_NAME,
291	"request_irq fail for EMIF EDAC irq\n");
292	goto err;
293	}
294
295	ret = edac_mc_add_mc(mci);
296	if (ret) {
297	edac_printk(KERN_ERR, EDAC_MOD_NAME,
298	"Failed to register mci: %d.\n", ret);
299	goto err;
300	}
301
302	/* Generate an interrupt with each 1b error */
303	ti_edac_writel(edac, 1 << EMIF_1B_ECC_ERR_THRSH_SHIFT,
304	EMIF_1B_ECC_ERR_THRSH);
305
306	/* Enable interrupts */
307	ti_edac_writel(edac,
308	EMIF_1B_ECC_ERR \| EMIF_2B_ECC_ERR \| EMIF_WR_ECC_ERR,
309	EMIF_IRQ_ENABLE_SET);
310
311	return 0;
312
313	err:
314	edac_mc_free(mci);
315	return ret;
316	}
317
318	static int ti_edac_remove(struct platform_device *pdev)
319	{
320	struct mem_ctl_info *mci = platform_get_drvdata(pdev);
321
322	edac_mc_del_mc(&pdev->dev);
323	edac_mc_free(mci);
324
325	return 0;
326	}
327
328	static struct platform_driver ti_edac_driver = {
329	.probe = ti_edac_probe,
330	.remove = ti_edac_remove,
331	.driver = {
332	.name = EDAC_MOD_NAME,
333	.of_match_table = ti_edac_of_match,
334	},
335	};
336
337	module_platform_driver(ti_edac_driver);
338
339	MODULE_AUTHOR("Texas Instruments Inc.");
340	MODULE_DESCRIPTION("EDAC Driver for Texas Instruments DDR3 MC");
341	MODULE_LICENSE("GPL v2");