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 IS_ENABLED(CONFIG_SATA_AHCI)
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