1/*
2 * Synopsys DesignWare Multimedia Card PCI Interface driver
3 *
4 * Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/interrupt.h>
13#include <linux/module.h>
14#include <linux/io.h>
15#include <linux/irq.h>
16#include <linux/pci.h>
17#include <linux/slab.h>
18#include <linux/mmc/host.h>
19#include <linux/mmc/mmc.h>
20#include <linux/mmc/dw_mmc.h>
21#include "dw_mmc.h"
22
23#define PCI_BAR_NO 2
24#define COMPLETE_BAR 0
25#define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
26#define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
27/* Defining the Capabilities */
28#define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
29				MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
30				MMC_CAP_SDIO_IRQ)
31
32static struct dw_mci_board pci_board_data = {
33	.num_slots			= 1,
34	.caps				= DW_MCI_CAPABILITIES,
35	.bus_hz				= 33 * 1000 * 1000,
36	.detect_delay_ms		= 200,
37	.fifo_depth			= 32,
38};
39
40static int __devinit dw_mci_pci_probe(struct pci_dev *pdev,
41				  const struct pci_device_id *entries)
42{
43	struct dw_mci *host;
44	int ret;
45
46	ret = pci_enable_device(pdev);
47	if (ret)
48		return ret;
49	if (pci_request_regions(pdev, "dw_mmc_pci")) {
50		ret = -ENODEV;
51		goto err_disable_dev;
52	}
53
54	host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
55	if (!host) {
56		ret = -ENOMEM;
57		goto err_release;
58	}
59
60	host->irq = pdev->irq;
61	host->irq_flags = IRQF_SHARED;
62	host->dev = pdev->dev;
63	host->pdata = &pci_board_data;
64
65	host->regs = pci_iomap(pdev, PCI_BAR_NO, COMPLETE_BAR);
66	if (!host->regs) {
67		ret = -EIO;
68		goto err_unmap;
69	}
70
71	pci_set_drvdata(pdev, host);
72	ret = dw_mci_probe(host);
73	if (ret)
74		goto err_probe_failed;
75	return ret;
76
77err_probe_failed:
78	pci_iounmap(pdev, host->regs);
79err_unmap:
80	kfree(host);
81err_release:
82	pci_release_regions(pdev);
83err_disable_dev:
84	pci_disable_device(pdev);
85	return ret;
86}
87
88static void __devexit dw_mci_pci_remove(struct pci_dev *pdev)
89{
90	struct dw_mci *host = pci_get_drvdata(pdev);
91
92	dw_mci_remove(host);
93	pci_set_drvdata(pdev, NULL);
94	pci_release_regions(pdev);
95	pci_iounmap(pdev, host->regs);
96	kfree(host);
97	pci_disable_device(pdev);
98}
99
100#ifdef CONFIG_PM_SLEEP
101static int dw_mci_pci_suspend(struct device *dev)
102{
103	int ret;
104	struct pci_dev *pdev = to_pci_dev(dev);
105	struct dw_mci *host = pci_get_drvdata(pdev);
106
107	ret = dw_mci_suspend(host);
108	return ret;
109}
110
111static int dw_mci_pci_resume(struct device *dev)
112{
113	int ret;
114	struct pci_dev *pdev = to_pci_dev(dev);
115	struct dw_mci *host = pci_get_drvdata(pdev);
116
117	ret = dw_mci_resume(host);
118	return ret;
119}
120#else
121#define dw_mci_pci_suspend	NULL
122#define dw_mci_pci_resume	NULL
123#endif /* CONFIG_PM_SLEEP */
124
125static SIMPLE_DEV_PM_OPS(dw_mci_pci_pmops, dw_mci_pci_suspend, dw_mci_pci_resume);
126
127static DEFINE_PCI_DEVICE_TABLE(dw_mci_pci_id) = {
128	{ PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
129	{}
130};
131MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
132
133static struct pci_driver dw_mci_pci_driver = {
134	.name		= "dw_mmc_pci",
135	.id_table	= dw_mci_pci_id,
136	.probe		= dw_mci_pci_probe,
137	.remove		= dw_mci_pci_remove,
138	.driver		=	{
139		.pm =   &dw_mci_pci_pmops
140	},
141};
142
143static int __init dw_mci_init(void)
144{
145	return pci_register_driver(&dw_mci_pci_driver);
146}
147
148static void __exit dw_mci_exit(void)
149{
150	pci_unregister_driver(&dw_mci_pci_driver);
151}
152
153module_init(dw_mci_init);
154module_exit(dw_mci_exit);
155
156MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
157MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
158MODULE_LICENSE("GPL v2");
159