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