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1 | /* |
2 | * pata_cypress.c - Cypress PATA for new ATA layer |
3 | * (C) 2006 Red Hat Inc |
4 | * Alan Cox |
5 | * |
6 | * Based heavily on |
7 | * linux/drivers/ide/pci/cy82c693.c Version 0.40 Sep. 10, 2002 |
8 | * |
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 <scsi/scsi_host.h> |
18 | #include <linux/libata.h> |
19 | |
20 | #define DRV_NAME "pata_cypress" |
21 | #define DRV_VERSION "0.1.5" |
22 | |
23 | /* here are the offset definitions for the registers */ |
24 | |
25 | enum { |
26 | CY82_IDE_CMDREG = 0x04, |
27 | CY82_IDE_ADDRSETUP = 0x48, |
28 | CY82_IDE_MASTER_IOR = 0x4C, |
29 | CY82_IDE_MASTER_IOW = 0x4D, |
30 | CY82_IDE_SLAVE_IOR = 0x4E, |
31 | CY82_IDE_SLAVE_IOW = 0x4F, |
32 | CY82_IDE_MASTER_8BIT = 0x50, |
33 | CY82_IDE_SLAVE_8BIT = 0x51, |
34 | |
35 | CY82_INDEX_PORT = 0x22, |
36 | CY82_DATA_PORT = 0x23, |
37 | |
38 | CY82_INDEX_CTRLREG1 = 0x01, |
39 | CY82_INDEX_CHANNEL0 = 0x30, |
40 | CY82_INDEX_CHANNEL1 = 0x31, |
41 | CY82_INDEX_TIMEOUT = 0x32 |
42 | }; |
43 | |
44 | /** |
45 | * cy82c693_set_piomode - set initial PIO mode data |
46 | * @ap: ATA interface |
47 | * @adev: ATA device |
48 | * |
49 | * Called to do the PIO mode setup. |
50 | */ |
51 | |
52 | static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev) |
53 | { |
54 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
55 | struct ata_timing t; |
56 | const unsigned long T = 1000000 / 33; |
57 | short time_16, time_8; |
58 | u32 addr; |
59 | |
60 | if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) { |
61 | printk(KERN_ERR DRV_NAME ": mome computation failed.\n"); |
62 | return; |
63 | } |
64 | |
65 | time_16 = clamp_val(t.recover - 1, 0, 15) | |
66 | (clamp_val(t.active - 1, 0, 15) << 4); |
67 | time_8 = clamp_val(t.act8b - 1, 0, 15) | |
68 | (clamp_val(t.rec8b - 1, 0, 15) << 4); |
69 | |
70 | if (adev->devno == 0) { |
71 | pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); |
72 | |
73 | addr &= ~0x0F; /* Mask bits */ |
74 | addr |= clamp_val(t.setup - 1, 0, 15); |
75 | |
76 | pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); |
77 | pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16); |
78 | pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16); |
79 | pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8); |
80 | } else { |
81 | pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); |
82 | |
83 | addr &= ~0xF0; /* Mask bits */ |
84 | addr |= (clamp_val(t.setup - 1, 0, 15) << 4); |
85 | |
86 | pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); |
87 | pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16); |
88 | pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16); |
89 | pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8); |
90 | } |
91 | } |
92 | |
93 | /** |
94 | * cy82c693_set_dmamode - set initial DMA mode data |
95 | * @ap: ATA interface |
96 | * @adev: ATA device |
97 | * |
98 | * Called to do the DMA mode setup. |
99 | */ |
100 | |
101 | static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
102 | { |
103 | int reg = CY82_INDEX_CHANNEL0 + ap->port_no; |
104 | |
105 | /* Be afraid, be very afraid. Magic registers in low I/O space */ |
106 | outb(reg, 0x22); |
107 | outb(adev->dma_mode - XFER_MW_DMA_0, 0x23); |
108 | |
109 | /* 0x50 gives the best behaviour on the Alpha's using this chip */ |
110 | outb(CY82_INDEX_TIMEOUT, 0x22); |
111 | outb(0x50, 0x23); |
112 | } |
113 | |
114 | static struct scsi_host_template cy82c693_sht = { |
115 | ATA_BMDMA_SHT(DRV_NAME), |
116 | }; |
117 | |
118 | static struct ata_port_operations cy82c693_port_ops = { |
119 | .inherits = &ata_bmdma_port_ops, |
120 | .cable_detect = ata_cable_40wire, |
121 | .set_piomode = cy82c693_set_piomode, |
122 | .set_dmamode = cy82c693_set_dmamode, |
123 | }; |
124 | |
125 | static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id) |
126 | { |
127 | static const struct ata_port_info info = { |
128 | .flags = ATA_FLAG_SLAVE_POSS, |
129 | .pio_mask = ATA_PIO4, |
130 | .mwdma_mask = ATA_MWDMA2, |
131 | .port_ops = &cy82c693_port_ops |
132 | }; |
133 | const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; |
134 | |
135 | /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2. |
136 | For the moment we don't handle the secondary. FIXME */ |
137 | |
138 | if (PCI_FUNC(pdev->devfn) != 1) |
139 | return -ENODEV; |
140 | |
141 | return ata_pci_bmdma_init_one(pdev, ppi, &cy82c693_sht, NULL, 0); |
142 | } |
143 | |
144 | static const struct pci_device_id cy82c693[] = { |
145 | { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), }, |
146 | |
147 | { }, |
148 | }; |
149 | |
150 | static struct pci_driver cy82c693_pci_driver = { |
151 | .name = DRV_NAME, |
152 | .id_table = cy82c693, |
153 | .probe = cy82c693_init_one, |
154 | .remove = ata_pci_remove_one, |
155 | #ifdef CONFIG_PM |
156 | .suspend = ata_pci_device_suspend, |
157 | .resume = ata_pci_device_resume, |
158 | #endif |
159 | }; |
160 | |
161 | module_pci_driver(cy82c693_pci_driver); |
162 | |
163 | MODULE_AUTHOR("Alan Cox"); |
164 | MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller"); |
165 | MODULE_LICENSE("GPL"); |
166 | MODULE_DEVICE_TABLE(pci, cy82c693); |
167 | MODULE_VERSION(DRV_VERSION); |
168 |
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