1/*
2 *	Marvell PATA driver.
3 *
4 *	For the moment we drive the PATA port in legacy mode. That
5 *	isn't making full use of the device functionality but it is
6 *	easy to get working.
7 *
8 *	(c) 2006 Red Hat
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/pci.h>
14#include <linux/init.h>
15#include <linux/blkdev.h>
16#include <linux/delay.h>
17#include <linux/device.h>
18#include <scsi/scsi_host.h>
19#include <linux/libata.h>
20#include <linux/ata.h>
21
22#define DRV_NAME	"pata_marvell"
23#define DRV_VERSION	"0.1.6"
24
25/**
26 *	marvell_pata_active	-	check if PATA is active
27 *	@pdev: PCI device
28 *
29 *	Returns 1 if the PATA port may be active. We know how to check this
30 *	for the 6145 but not the other devices
31 */
32
33static int marvell_pata_active(struct pci_dev *pdev)
34{
35	int i;
36	u32 devices;
37	void __iomem *barp;
38
39	/* We don't yet know how to do this for other devices */
40	if (pdev->device != 0x6145)
41		return 1;
42
43	barp = pci_iomap(pdev, 5, 0x10);
44	if (barp == NULL)
45		return -ENOMEM;
46
47	printk("BAR5:");
48	for(i = 0; i <= 0x0F; i++)
49		printk("%02X:%02X ", i, ioread8(barp + i));
50	printk("\n");
51
52	devices = ioread32(barp + 0x0C);
53	pci_iounmap(pdev, barp);
54
55	if (devices & 0x10)
56		return 1;
57	return 0;
58}
59
60/**
61 *	marvell_pre_reset	-	probe begin
62 *	@link: link
63 *	@deadline: deadline jiffies for the operation
64 *
65 *	Perform the PATA port setup we need.
66 */
67
68static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
69{
70	struct ata_port *ap = link->ap;
71	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
72
73	if (pdev->device == 0x6145 && ap->port_no == 0 &&
74		!marvell_pata_active(pdev))	/* PATA enable ? */
75			return -ENOENT;
76
77	return ata_sff_prereset(link, deadline);
78}
79
80static int marvell_cable_detect(struct ata_port *ap)
81{
82	/* Cable type */
83	switch(ap->port_no)
84	{
85	case 0:
86		if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
87			return ATA_CBL_PATA40;
88		return ATA_CBL_PATA80;
89	case 1: /* Legacy SATA port */
90		return ATA_CBL_SATA;
91	}
92
93	BUG();
94	return 0;	/* Our BUG macro needs the right markup */
95}
96
97/* No PIO or DMA methods needed for this device */
98
99static struct scsi_host_template marvell_sht = {
100	ATA_BMDMA_SHT(DRV_NAME),
101};
102
103static struct ata_port_operations marvell_ops = {
104	.inherits		= &ata_bmdma_port_ops,
105	.cable_detect		= marvell_cable_detect,
106	.prereset		= marvell_pre_reset,
107};
108
109
110/**
111 *	marvell_init_one - Register Marvell ATA PCI device with kernel services
112 *	@pdev: PCI device to register
113 *	@ent: Entry in marvell_pci_tbl matching with @pdev
114 *
115 *	Called from kernel PCI layer.
116 *
117 *	LOCKING:
118 *	Inherited from PCI layer (may sleep).
119 *
120 *	RETURNS:
121 *	Zero on success, or -ERRNO value.
122 */
123
124static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
125{
126	static const struct ata_port_info info = {
127		.flags		= ATA_FLAG_SLAVE_POSS,
128
129		.pio_mask	= ATA_PIO4,
130		.mwdma_mask	= ATA_MWDMA2,
131		.udma_mask 	= ATA_UDMA5,
132
133		.port_ops	= &marvell_ops,
134	};
135	static const struct ata_port_info info_sata = {
136		/* Slave possible as its magically mapped not real */
137		.flags		= ATA_FLAG_SLAVE_POSS,
138
139		.pio_mask	= ATA_PIO4,
140		.mwdma_mask	= ATA_MWDMA2,
141		.udma_mask 	= ATA_UDMA6,
142
143		.port_ops	= &marvell_ops,
144	};
145	const struct ata_port_info *ppi[] = { &info, &info_sata };
146
147	if (pdev->device == 0x6101)
148		ppi[1] = &ata_dummy_port_info;
149
150#if defined(CONFIG_SATA_AHCI) || defined(CONFIG_SATA_AHCI_MODULE)
151	if (!marvell_pata_active(pdev)) {
152		printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n");
153		return -ENODEV;
154	}
155#endif
156	return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0);
157}
158
159static const struct pci_device_id marvell_pci_tbl[] = {
160	{ PCI_DEVICE(0x11AB, 0x6101), },
161	{ PCI_DEVICE(0x11AB, 0x6121), },
162	{ PCI_DEVICE(0x11AB, 0x6123), },
163	{ PCI_DEVICE(0x11AB, 0x6145), },
164	{ PCI_DEVICE(0x1B4B, 0x91A0), },
165	{ PCI_DEVICE(0x1B4B, 0x91A4), },
166
167	{ }	/* terminate list */
168};
169
170static struct pci_driver marvell_pci_driver = {
171	.name			= DRV_NAME,
172	.id_table		= marvell_pci_tbl,
173	.probe			= marvell_init_one,
174	.remove			= ata_pci_remove_one,
175#ifdef CONFIG_PM
176	.suspend		= ata_pci_device_suspend,
177	.resume			= ata_pci_device_resume,
178#endif
179};
180
181static int __init marvell_init(void)
182{
183	return pci_register_driver(&marvell_pci_driver);
184}
185
186static void __exit marvell_exit(void)
187{
188	pci_unregister_driver(&marvell_pci_driver);
189}
190
191module_init(marvell_init);
192module_exit(marvell_exit);
193
194MODULE_AUTHOR("Alan Cox");
195MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
196MODULE_LICENSE("GPL");
197MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
198MODULE_VERSION(DRV_VERSION);
199
200