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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 | |
33 | static 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 | |
68 | static 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 | |
80 | static 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 | |
99 | static struct scsi_host_template marvell_sht = { |
100 | ATA_BMDMA_SHT(DRV_NAME), |
101 | }; |
102 | |
103 | static 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 | |
124 | static 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 | |
159 | static 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 | |
170 | static 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 | |
181 | module_pci_driver(marvell_pci_driver); |
182 | |
183 | MODULE_AUTHOR("Alan Cox"); |
184 | MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode"); |
185 | MODULE_LICENSE("GPL"); |
186 | MODULE_DEVICE_TABLE(pci, marvell_pci_tbl); |
187 | MODULE_VERSION(DRV_VERSION); |
188 |
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