pata: cable methods
[linux-2.6.git] / drivers / ata / pata_cypress.c
1 /*
2  * pata_cypress.c       - Cypress PATA for new ATA layer
3  *                        (C) 2006 Red Hat Inc
4  *                        Alan Cox <alan@redhat.com>
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 "0.1.4"
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 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4);
66         time_8 = FIT(t.act8b, 0, 15) | (FIT(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 |= FIT(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 |= (FIT(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         .module                 = THIS_MODULE,
114         .name                   = DRV_NAME,
115         .ioctl                  = ata_scsi_ioctl,
116         .queuecommand           = ata_scsi_queuecmd,
117         .can_queue              = ATA_DEF_QUEUE,
118         .this_id                = ATA_SHT_THIS_ID,
119         .sg_tablesize           = LIBATA_MAX_PRD,
120         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
121         .emulated               = ATA_SHT_EMULATED,
122         .use_clustering         = ATA_SHT_USE_CLUSTERING,
123         .proc_name              = DRV_NAME,
124         .dma_boundary           = ATA_DMA_BOUNDARY,
125         .slave_configure        = ata_scsi_slave_config,
126         .slave_destroy          = ata_scsi_slave_destroy,
127         .bios_param             = ata_std_bios_param,
128 #ifdef CONFIG_PM
129         .resume                 = ata_scsi_device_resume,
130         .suspend                = ata_scsi_device_suspend,
131 #endif
132 };
133
134 static struct ata_port_operations cy82c693_port_ops = {
135         .port_disable   = ata_port_disable,
136         .set_piomode    = cy82c693_set_piomode,
137         .set_dmamode    = cy82c693_set_dmamode,
138         .mode_filter    = ata_pci_default_filter,
139
140         .tf_load        = ata_tf_load,
141         .tf_read        = ata_tf_read,
142         .check_status   = ata_check_status,
143         .exec_command   = ata_exec_command,
144         .dev_select     = ata_std_dev_select,
145
146         .freeze         = ata_bmdma_freeze,
147         .thaw           = ata_bmdma_thaw,
148         .error_handler  = ata_bmdma_error_handler,
149         .post_internal_cmd = ata_bmdma_post_internal_cmd,
150         .cable_detect   = ata_cable_40wire,
151
152         .bmdma_setup    = ata_bmdma_setup,
153         .bmdma_start    = ata_bmdma_start,
154         .bmdma_stop     = ata_bmdma_stop,
155         .bmdma_status   = ata_bmdma_status,
156
157         .qc_prep        = ata_qc_prep,
158         .qc_issue       = ata_qc_issue_prot,
159
160         .data_xfer      = ata_data_xfer,
161
162         .irq_handler    = ata_interrupt,
163         .irq_clear      = ata_bmdma_irq_clear,
164         .irq_on         = ata_irq_on,
165         .irq_ack        = ata_irq_ack,
166
167         .port_start     = ata_port_start,
168 };
169
170 static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
171 {
172         static struct ata_port_info info = {
173                 .sht = &cy82c693_sht,
174                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
175                 .pio_mask = 0x1f,
176                 .mwdma_mask = 0x07,
177                 .port_ops = &cy82c693_port_ops
178         };
179         static struct ata_port_info *port_info[1] = { &info };
180
181         /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
182            For the moment we don't handle the secondary. FIXME */
183
184         if (PCI_FUNC(pdev->devfn) != 1)
185                 return -ENODEV;
186
187         return ata_pci_init_one(pdev, port_info, 1);
188 }
189
190 static const struct pci_device_id cy82c693[] = {
191         { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
192
193         { },
194 };
195
196 static struct pci_driver cy82c693_pci_driver = {
197         .name           = DRV_NAME,
198         .id_table       = cy82c693,
199         .probe          = cy82c693_init_one,
200         .remove         = ata_pci_remove_one,
201 #ifdef CONFIG_PM
202         .suspend        = ata_pci_device_suspend,
203         .resume         = ata_pci_device_resume,
204 #endif
205 };
206
207 static int __init cy82c693_init(void)
208 {
209         return pci_register_driver(&cy82c693_pci_driver);
210 }
211
212
213 static void __exit cy82c693_exit(void)
214 {
215         pci_unregister_driver(&cy82c693_pci_driver);
216 }
217
218
219 MODULE_AUTHOR("Alan Cox");
220 MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
221 MODULE_LICENSE("GPL");
222 MODULE_DEVICE_TABLE(pci, cy82c693);
223 MODULE_VERSION(DRV_VERSION);
224
225 module_init(cy82c693_init);
226 module_exit(cy82c693_exit);