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  <alan@redhat.com>
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	"0.1.4"
24
25/**
26 *	marvell_pre_reset	-	check for 40/80 pin
27 *	@ap: Port
28 *	@deadline: deadline jiffies for the operation
29 *
30 *	Perform the PATA port setup we need.
31 */
32
33static int marvell_pre_reset(struct ata_port *ap, unsigned long deadline)
34{
35	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
36	u32 devices;
37	void __iomem *barp;
38	int i;
39
40	/* Check if our port is enabled */
41
42	barp = pci_iomap(pdev, 5, 0x10);
43	if (barp == NULL)
44		return -ENOMEM;
45	printk("BAR5:");
46	for(i = 0; i <= 0x0F; i++)
47		printk("%02X:%02X ", i, readb(barp + i));
48	printk("\n");
49
50	devices = readl(barp + 0x0C);
51	pci_iounmap(pdev, barp);
52
53	if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
54	    (!(devices & 0x10)))	/* PATA enable ? */
55		return -ENOENT;
56
57	return ata_std_prereset(ap, deadline);
58}
59
60static int marvell_cable_detect(struct ata_port *ap)
61{
62	/* Cable type */
63	switch(ap->port_no)
64	{
65	case 0:
66		if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
67			return ATA_CBL_PATA40;
68		return ATA_CBL_PATA80;
69	case 1: /* Legacy SATA port */
70		return ATA_CBL_SATA;
71	}
72
73	BUG();
74	return 0;	/* Our BUG macro needs the right markup */
75}
76
77/**
78 *	marvell_error_handler - Setup and error handler
79 *	@ap: Port to handle
80 *
81 *	LOCKING:
82 *	None (inherited from caller).
83 */
84
85static void marvell_error_handler(struct ata_port *ap)
86{
87	return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset,
88				  NULL, ata_std_postreset);
89}
90
91/* No PIO or DMA methods needed for this device */
92
93static struct scsi_host_template marvell_sht = {
94	.module			= THIS_MODULE,
95	.name			= DRV_NAME,
96	.ioctl			= ata_scsi_ioctl,
97	.queuecommand		= ata_scsi_queuecmd,
98	.can_queue		= ATA_DEF_QUEUE,
99	.this_id		= ATA_SHT_THIS_ID,
100	.sg_tablesize		= LIBATA_MAX_PRD,
101	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
102	.emulated		= ATA_SHT_EMULATED,
103	.use_clustering		= ATA_SHT_USE_CLUSTERING,
104	.proc_name		= DRV_NAME,
105	.dma_boundary		= ATA_DMA_BOUNDARY,
106	.slave_configure	= ata_scsi_slave_config,
107	.slave_destroy		= ata_scsi_slave_destroy,
108	/* Use standard CHS mapping rules */
109	.bios_param		= ata_std_bios_param,
110};
111
112static const struct ata_port_operations marvell_ops = {
113	.port_disable		= ata_port_disable,
114
115	/* Task file is PCI ATA format, use helpers */
116	.tf_load		= ata_tf_load,
117	.tf_read		= ata_tf_read,
118	.check_status		= ata_check_status,
119	.exec_command		= ata_exec_command,
120	.dev_select		= ata_std_dev_select,
121
122	.freeze			= ata_bmdma_freeze,
123	.thaw			= ata_bmdma_thaw,
124	.error_handler		= marvell_error_handler,
125	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
126	.cable_detect		= marvell_cable_detect,
127
128	/* BMDMA handling is PCI ATA format, use helpers */
129	.bmdma_setup		= ata_bmdma_setup,
130	.bmdma_start		= ata_bmdma_start,
131	.bmdma_stop		= ata_bmdma_stop,
132	.bmdma_status		= ata_bmdma_status,
133	.qc_prep		= ata_qc_prep,
134	.qc_issue		= ata_qc_issue_prot,
135	.data_xfer		= ata_data_xfer,
136
137	/* Timeout handling */
138	.irq_handler		= ata_interrupt,
139	.irq_clear		= ata_bmdma_irq_clear,
140	.irq_on			= ata_irq_on,
141	.irq_ack		= ata_irq_ack,
142
143	/* Generic PATA PCI ATA helpers */
144	.port_start		= ata_port_start,
145};
146
147
148/**
149 *	marvell_init_one - Register Marvell ATA PCI device with kernel services
150 *	@pdev: PCI device to register
151 *	@ent: Entry in marvell_pci_tbl matching with @pdev
152 *
153 *	Called from kernel PCI layer.
154 *
155 *	LOCKING:
156 *	Inherited from PCI layer (may sleep).
157 *
158 *	RETURNS:
159 *	Zero on success, or -ERRNO value.
160 */
161
162static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
163{
164	static const struct ata_port_info info = {
165		.sht		= &marvell_sht,
166		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
167
168		.pio_mask	= 0x1f,
169		.mwdma_mask	= 0x07,
170		.udma_mask 	= 0x3f,
171
172		.port_ops	= &marvell_ops,
173	};
174	static const struct ata_port_info info_sata = {
175		.sht		= &marvell_sht,
176		/* Slave possible as its magically mapped not real */
177		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
178
179		.pio_mask	= 0x1f,
180		.mwdma_mask	= 0x07,
181		.udma_mask 	= 0x7f,
182
183		.port_ops	= &marvell_ops,
184	};
185	const struct ata_port_info *ppi[] = { &info, &info_sata };
186
187	if (pdev->device == 0x6101)
188		ppi[1] = &ata_dummy_port_info;
189
190	return ata_pci_init_one(pdev, ppi);
191}
192
193static const struct pci_device_id marvell_pci_tbl[] = {
194	{ PCI_DEVICE(0x11AB, 0x6101), },
195	{ PCI_DEVICE(0x11AB, 0x6145), },
196	{ }	/* terminate list */
197};
198
199static struct pci_driver marvell_pci_driver = {
200	.name			= DRV_NAME,
201	.id_table		= marvell_pci_tbl,
202	.probe			= marvell_init_one,
203	.remove			= ata_pci_remove_one,
204#ifdef CONFIG_PM
205	.suspend		= ata_pci_device_suspend,
206	.resume			= ata_pci_device_resume,
207#endif
208};
209
210static int __init marvell_init(void)
211{
212	return pci_register_driver(&marvell_pci_driver);
213}
214
215static void __exit marvell_exit(void)
216{
217	pci_unregister_driver(&marvell_pci_driver);
218}
219
220module_init(marvell_init);
221module_exit(marvell_exit);
222
223MODULE_AUTHOR("Alan Cox");
224MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
225MODULE_LICENSE("GPL");
226MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
227MODULE_VERSION(DRV_VERSION);
228