8479186a23738ad01e38d3874b77bb10e580dd50
[linux-3.10.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 static int cy82c693_pre_reset(struct ata_port *ap)
45 {
46         ap->cbl = ATA_CBL_PATA40;
47         return ata_std_prereset(ap);
48 }
49
50 static void cy82c693_error_handler(struct ata_port *ap)
51 {
52         ata_bmdma_drive_eh(ap, cy82c693_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
53 }
54
55 /**
56  *      cy82c693_set_piomode    -       set initial PIO mode data
57  *      @ap: ATA interface
58  *      @adev: ATA device
59  *
60  *      Called to do the PIO mode setup.
61  */
62
63 static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev)
64 {
65         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
66         struct ata_timing t;
67         const unsigned long T = 1000000 / 33;
68         short time_16, time_8;
69         u32 addr;
70
71         if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) {
72                 printk(KERN_ERR DRV_NAME ": mome computation failed.\n");
73                 return;
74         }
75
76         time_16 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4);
77         time_8 = FIT(t.act8b, 0, 15) | (FIT(t.rec8b, 0, 15) << 4);
78
79         if (adev->devno == 0) {
80                 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
81
82                 addr &= ~0x0F;  /* Mask bits */
83                 addr |= FIT(t.setup, 0, 15);
84
85                 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
86                 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16);
87                 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16);
88                 pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8);
89         } else {
90                 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
91
92                 addr &= ~0xF0;  /* Mask bits */
93                 addr |= (FIT(t.setup, 0, 15) << 4);
94
95                 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
96                 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16);
97                 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16);
98                 pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8);
99         }
100 }
101
102 /**
103  *      cy82c693_set_dmamode    -       set initial DMA mode data
104  *      @ap: ATA interface
105  *      @adev: ATA device
106  *
107  *      Called to do the DMA mode setup.
108  */
109
110 static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev)
111 {
112         int reg = CY82_INDEX_CHANNEL0 + ap->port_no;
113
114         /* Be afraid, be very afraid. Magic registers  in low I/O space */
115         outb(reg, 0x22);
116         outb(adev->dma_mode - XFER_MW_DMA_0, 0x23);
117
118         /* 0x50 gives the best behaviour on the Alpha's using this chip */
119         outb(CY82_INDEX_TIMEOUT, 0x22);
120         outb(0x50, 0x23);
121 }
122
123 static struct scsi_host_template cy82c693_sht = {
124         .module                 = THIS_MODULE,
125         .name                   = DRV_NAME,
126         .ioctl                  = ata_scsi_ioctl,
127         .queuecommand           = ata_scsi_queuecmd,
128         .can_queue              = ATA_DEF_QUEUE,
129         .this_id                = ATA_SHT_THIS_ID,
130         .sg_tablesize           = LIBATA_MAX_PRD,
131         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
132         .emulated               = ATA_SHT_EMULATED,
133         .use_clustering         = ATA_SHT_USE_CLUSTERING,
134         .proc_name              = DRV_NAME,
135         .dma_boundary           = ATA_DMA_BOUNDARY,
136         .slave_configure        = ata_scsi_slave_config,
137         .slave_destroy          = ata_scsi_slave_destroy,
138         .bios_param             = ata_std_bios_param,
139         .resume                 = ata_scsi_device_resume,
140         .suspend                = ata_scsi_device_suspend,
141 };
142
143 static struct ata_port_operations cy82c693_port_ops = {
144         .port_disable   = ata_port_disable,
145         .set_piomode    = cy82c693_set_piomode,
146         .set_dmamode    = cy82c693_set_dmamode,
147         .mode_filter    = ata_pci_default_filter,
148
149         .tf_load        = ata_tf_load,
150         .tf_read        = ata_tf_read,
151         .check_status   = ata_check_status,
152         .exec_command   = ata_exec_command,
153         .dev_select     = ata_std_dev_select,
154
155         .freeze         = ata_bmdma_freeze,
156         .thaw           = ata_bmdma_thaw,
157         .error_handler  = cy82c693_error_handler,
158         .post_internal_cmd = ata_bmdma_post_internal_cmd,
159
160         .bmdma_setup    = ata_bmdma_setup,
161         .bmdma_start    = ata_bmdma_start,
162         .bmdma_stop     = ata_bmdma_stop,
163         .bmdma_status   = ata_bmdma_status,
164
165         .qc_prep        = ata_qc_prep,
166         .qc_issue       = ata_qc_issue_prot,
167
168         .data_xfer      = ata_pio_data_xfer,
169
170         .irq_handler    = ata_interrupt,
171         .irq_clear      = ata_bmdma_irq_clear,
172
173         .port_start     = ata_port_start,
174 };
175
176 static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
177 {
178         static struct ata_port_info info = {
179                 .sht = &cy82c693_sht,
180                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
181                 .pio_mask = 0x1f,
182                 .mwdma_mask = 0x07,
183                 .port_ops = &cy82c693_port_ops
184         };
185         static struct ata_port_info *port_info[1] = { &info };
186
187         /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
188            For the moment we don't handle the secondary. FIXME */
189
190         if (PCI_FUNC(pdev->devfn) != 1)
191                 return -ENODEV;
192
193         return ata_pci_init_one(pdev, port_info, 1);
194 }
195
196 static const struct pci_device_id cy82c693[] = {
197         { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
198
199         { },
200 };
201
202 static struct pci_driver cy82c693_pci_driver = {
203         .name           = DRV_NAME,
204         .id_table       = cy82c693,
205         .probe          = cy82c693_init_one,
206         .remove         = ata_pci_remove_one,
207         .suspend        = ata_pci_device_suspend,
208         .resume         = ata_pci_device_resume,
209 };
210
211 static int __init cy82c693_init(void)
212 {
213         return pci_register_driver(&cy82c693_pci_driver);
214 }
215
216
217 static void __exit cy82c693_exit(void)
218 {
219         pci_unregister_driver(&cy82c693_pci_driver);
220 }
221
222
223 MODULE_AUTHOR("Alan Cox");
224 MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
225 MODULE_LICENSE("GPL");
226 MODULE_DEVICE_TABLE(pci, cy82c693);
227 MODULE_VERSION(DRV_VERSION);
228
229 module_init(cy82c693_init);
230 module_exit(cy82c693_exit);