summaryrefslogtreecommitdiffstats
path: root/drivers/media/pci/ddbridge/ddbridge-main.c
blob: 363badab7cf07b9a0c8e399c6d171a780f4737a4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
// SPDX-License-Identifier: GPL-2.0
/*
 * ddbridge.c: Digital Devices PCIe bridge driver
 *
 * Copyright (C) 2010-2017 Digital Devices GmbH
 *                         Ralph Metzler <rjkm@metzlerbros.de>
 *                         Marcus Metzler <mocm@metzlerbros.de>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/io.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/timer.h>
#include <linux/i2c.h>
#include <linux/swab.h>
#include <linux/vmalloc.h>

#include "ddbridge.h"
#include "ddbridge-i2c.h"
#include "ddbridge-regs.h"
#include "ddbridge-hw.h"
#include "ddbridge-io.h"

/****************************************************************************/
/* module parameters */

#ifdef CONFIG_PCI_MSI
#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
static int msi = 1;
#else
static int msi;
#endif
module_param(msi, int, 0444);
#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable, 1-enable (default)");
#else
MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable (default), 1-enable");
#endif
#endif

/****************************************************************************/
/****************************************************************************/
/****************************************************************************/

static void ddb_irq_disable(struct ddb *dev)
{
	ddbwritel(dev, 0, INTERRUPT_ENABLE);
	ddbwritel(dev, 0, MSI1_ENABLE);
}

static void ddb_msi_exit(struct ddb *dev)
{
#ifdef CONFIG_PCI_MSI
	if (dev->msi)
		pci_free_irq_vectors(dev->pdev);
#endif
}

static void ddb_irq_exit(struct ddb *dev)
{
	ddb_irq_disable(dev);
	if (dev->msi == 2)
		free_irq(pci_irq_vector(dev->pdev, 1), dev);
	free_irq(pci_irq_vector(dev->pdev, 0), dev);
}

static void ddb_remove(struct pci_dev *pdev)
{
	struct ddb *dev = (struct ddb *)pci_get_drvdata(pdev);

	ddb_device_destroy(dev);
	ddb_ports_detach(dev);
	ddb_i2c_release(dev);

	ddb_irq_exit(dev);
	ddb_msi_exit(dev);
	ddb_ports_release(dev);
	ddb_buffers_free(dev);

	ddb_unmap(dev);
	pci_set_drvdata(pdev, NULL);
	pci_disable_device(pdev);
}

#ifdef CONFIG_PCI_MSI
static void ddb_irq_msi(struct ddb *dev, int nr)
{
	int stat;

	if (msi && pci_msi_enabled()) {
		stat = pci_alloc_irq_vectors(dev->pdev, 1, nr,
					     PCI_IRQ_MSI | PCI_IRQ_MSIX);
		if (stat >= 1) {
			dev->msi = stat;
			dev_info(dev->dev, "using %d MSI interrupt(s)\n",
				 dev->msi);
		} else {
			dev_info(dev->dev, "MSI not available.\n");
		}
	}
}
#endif

static int ddb_irq_init(struct ddb *dev)
{
	int stat;
	int irq_flag = IRQF_SHARED;

	ddbwritel(dev, 0x00000000, INTERRUPT_ENABLE);
	ddbwritel(dev, 0x00000000, MSI1_ENABLE);
	ddbwritel(dev, 0x00000000, MSI2_ENABLE);
	ddbwritel(dev, 0x00000000, MSI3_ENABLE);
	ddbwritel(dev, 0x00000000, MSI4_ENABLE);
	ddbwritel(dev, 0x00000000, MSI5_ENABLE);
	ddbwritel(dev, 0x00000000, MSI6_ENABLE);
	ddbwritel(dev, 0x00000000, MSI7_ENABLE);

#ifdef CONFIG_PCI_MSI
	ddb_irq_msi(dev, 2);

	if (dev->msi)
		irq_flag = 0;
	if (dev->msi == 2) {
		stat = request_irq(pci_irq_vector(dev->pdev, 0),
				   ddb_irq_handler0, irq_flag, "ddbridge",
				   (void *)dev);
		if (stat < 0)
			return stat;
		stat = request_irq(pci_irq_vector(dev->pdev, 1),
				   ddb_irq_handler1, irq_flag, "ddbridge",
				   (void *)dev);
		if (stat < 0) {
			free_irq(pci_irq_vector(dev->pdev, 0), dev);
			return stat;
		}
	} else
#endif
	{
		stat = request_irq(pci_irq_vector(dev->pdev, 0),
				   ddb_irq_handler, irq_flag, "ddbridge",
				   (void *)dev);
		if (stat < 0)
			return stat;
	}
	if (dev->msi == 2) {
		ddbwritel(dev, 0x0fffff00, INTERRUPT_ENABLE);
		ddbwritel(dev, 0x0000000f, MSI1_ENABLE);
	} else {
		ddbwritel(dev, 0x0fffff0f, INTERRUPT_ENABLE);
		ddbwritel(dev, 0x00000000, MSI1_ENABLE);
	}
	return stat;
}

static int ddb_probe(struct pci_dev *pdev,
		     const struct pci_device_id *id)
{
	struct ddb *dev;
	int stat = 0;

	if (pci_enable_device(pdev) < 0)
		return -ENODEV;

	pci_set_master(pdev);

	if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
		if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)))
			return -ENODEV;

	dev = vzalloc(sizeof(*dev));
	if (!dev)
		return -ENOMEM;

	mutex_init(&dev->mutex);
	dev->has_dma = 1;
	dev->pdev = pdev;
	dev->dev = &pdev->dev;
	pci_set_drvdata(pdev, dev);

	dev->link[0].ids.vendor = id->vendor;
	dev->link[0].ids.device = id->device;
	dev->link[0].ids.subvendor = id->subvendor;
	dev->link[0].ids.subdevice = pdev->subsystem_device;
	dev->link[0].ids.devid = (id->device << 16) | id->vendor;

	dev->link[0].dev = dev;
	dev->link[0].info = get_ddb_info(id->vendor, id->device,
					 id->subvendor, pdev->subsystem_device);

	dev_info(&pdev->dev, "detected %s\n", dev->link[0].info->name);

	dev->regs_len = pci_resource_len(dev->pdev, 0);
	dev->regs = ioremap(pci_resource_start(dev->pdev, 0),
			    pci_resource_len(dev->pdev, 0));

	if (!dev->regs) {
		dev_err(&pdev->dev, "not enough memory for register map\n");
		stat = -ENOMEM;
		goto fail;
	}
	if (ddbreadl(dev, 0) == 0xffffffff) {
		dev_err(&pdev->dev, "cannot read registers\n");
		stat = -ENODEV;
		goto fail;
	}

	dev->link[0].ids.hwid = ddbreadl(dev, 0);
	dev->link[0].ids.regmapid = ddbreadl(dev, 4);

	dev_info(&pdev->dev, "HW %08x REGMAP %08x\n",
		 dev->link[0].ids.hwid, dev->link[0].ids.regmapid);

	ddbwritel(dev, 0, DMA_BASE_READ);
	ddbwritel(dev, 0, DMA_BASE_WRITE);

	stat = ddb_irq_init(dev);
	if (stat < 0)
		goto fail0;

	if (ddb_init(dev) == 0)
		return 0;

	ddb_irq_exit(dev);
fail0:
	dev_err(&pdev->dev, "fail0\n");
	ddb_msi_exit(dev);
fail:
	dev_err(&pdev->dev, "fail\n");

	ddb_unmap(dev);
	pci_set_drvdata(pdev, NULL);
	pci_disable_device(pdev);
	return stat;
}

/****************************************************************************/
/****************************************************************************/
/****************************************************************************/

#define DDB_DEVICE_ANY(_device) \
		{ PCI_DEVICE_SUB(DDVID, _device, DDVID, PCI_ANY_ID) }

static const struct pci_device_id ddb_id_table[] = {
	DDB_DEVICE_ANY(0x0002),
	DDB_DEVICE_ANY(0x0003),
	DDB_DEVICE_ANY(0x0005),
	DDB_DEVICE_ANY(0x0006),
	DDB_DEVICE_ANY(0x0007),
	DDB_DEVICE_ANY(0x0008),
	DDB_DEVICE_ANY(0x0009),
	DDB_DEVICE_ANY(0x0011),
	DDB_DEVICE_ANY(0x0012),
	DDB_DEVICE_ANY(0x0013),
	DDB_DEVICE_ANY(0x0201),
	DDB_DEVICE_ANY(0x0203),
	DDB_DEVICE_ANY(0x0210),
	DDB_DEVICE_ANY(0x0220),
	DDB_DEVICE_ANY(0x0320),
	DDB_DEVICE_ANY(0x0321),
	DDB_DEVICE_ANY(0x0322),
	DDB_DEVICE_ANY(0x0323),
	DDB_DEVICE_ANY(0x0328),
	DDB_DEVICE_ANY(0x0329),
	{0}
};

MODULE_DEVICE_TABLE(pci, ddb_id_table);

static struct pci_driver ddb_pci_driver = {
	.name        = "ddbridge",
	.id_table    = ddb_id_table,
	.probe       = ddb_probe,
	.remove      = ddb_remove,
};

static __init int module_init_ddbridge(void)
{
	int stat;

	pr_info("Digital Devices PCIE bridge driver "
		DDBRIDGE_VERSION
		", Copyright (C) 2010-17 Digital Devices GmbH\n");
	stat = ddb_init_ddbridge();
	if (stat < 0)
		return stat;
	stat = pci_register_driver(&ddb_pci_driver);
	if (stat < 0)
		ddb_exit_ddbridge(0, stat);

	return stat;
}

static __exit void module_exit_ddbridge(void)
{
	pci_unregister_driver(&ddb_pci_driver);
	ddb_exit_ddbridge(0, 0);
}

module_init(module_init_ddbridge);
module_exit(module_exit_ddbridge);

MODULE_DESCRIPTION("Digital Devices PCIe Bridge");
MODULE_AUTHOR("Ralph and Marcus Metzler, Metzler Brothers Systementwicklung GbR");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(DDBRIDGE_VERSION);