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, 0, 15) | (clamp_val(t.active, 0, 15) << 4);
66 time_8 = clamp_val(t.act8b, 0, 15) | (clamp_val(t.rec8b, 0, 15) << 4);
67
68 if (adev->devno == 0) {
69 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
70
71 addr &= ~0x0F; /* Mask bits */
72 addr |= clamp_val(t.setup, 0, 15);
73
74 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
75 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16);
76 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16);
77 pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8);
78 } else {
79 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
80
81 addr &= ~0xF0; /* Mask bits */
82 addr |= (clamp_val(t.setup, 0, 15) << 4);
83
84 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
85 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16);
86 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16);
87 pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8);
88 }
89 }
90
91 /**
92 * cy82c693_set_dmamode - set initial DMA mode data
93 * @ap: ATA interface
94 * @adev: ATA device
95 *
96 * Called to do the DMA mode setup.
97 */
98
99 static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev)
100 {
101 int reg = CY82_INDEX_CHANNEL0 + ap->port_no;
102
103 /* Be afraid, be very afraid. Magic registers in low I/O space */
104 outb(reg, 0x22);
105 outb(adev->dma_mode - XFER_MW_DMA_0, 0x23);
106
107 /* 0x50 gives the best behaviour on the Alpha's using this chip */
108 outb(CY82_INDEX_TIMEOUT, 0x22);
109 outb(0x50, 0x23);
110 }
111
112 static struct scsi_host_template cy82c693_sht = {
113 ATA_BMDMA_SHT(DRV_NAME),
114 };
115
116 static struct ata_port_operations cy82c693_port_ops = {
117 .inherits = &ata_bmdma_port_ops,
118 .cable_detect = ata_cable_40wire,
119 .set_piomode = cy82c693_set_piomode,
120 .set_dmamode = cy82c693_set_dmamode,
121 };
122
123 static int cy82c693_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 .pio_mask = ATA_PIO4,
128 .mwdma_mask = ATA_MWDMA2,
129 .port_ops = &cy82c693_port_ops
130 };
131 const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
132
133 /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
134 For the moment we don't handle the secondary. FIXME */
135
136 if (PCI_FUNC(pdev->devfn) != 1)
137 return -ENODEV;
138
139 return ata_pci_sff_init_one(pdev, ppi, &cy82c693_sht, NULL);
140 }
141
142 static const struct pci_device_id cy82c693[] = {
143 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
144
145 { },
146 };
147
148 static struct pci_driver cy82c693_pci_driver = {
149 .name = DRV_NAME,
150 .id_table = cy82c693,
151 .probe = cy82c693_init_one,
152 .remove = ata_pci_remove_one,
153 #ifdef CONFIG_PM
154 .suspend = ata_pci_device_suspend,
155 .resume = ata_pci_device_resume,
156 #endif
157 };
158
159 static int __init cy82c693_init(void)
160 {
161 return pci_register_driver(&cy82c693_pci_driver);
162 }
163
164
165 static void __exit cy82c693_exit(void)
166 {
167 pci_unregister_driver(&cy82c693_pci_driver);
168 }
169
170
171 MODULE_AUTHOR("Alan Cox");
172 MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
173 MODULE_LICENSE("GPL");
174 MODULE_DEVICE_TABLE(pci, cy82c693);
175 MODULE_VERSION(DRV_VERSION);
176
177 module_init(cy82c693_init);
178 module_exit(cy82c693_exit);
179
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