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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_cypress.c - Cypress PATA for new ATA layer
3 * (C) 2006 Red Hat Inc
Alan Coxab771632008-10-27 15:09:10 +00004 * Alan Cox
Jeff Garzik669a5db2006-08-29 18:12:40 -04005 *
6 * Based heavily on
7 * linux/drivers/ide/pci/cy82c693.c Version 0.40 Sep. 10, 2002
8 *
9 */
Jeff Garzik85cd7252006-08-31 00:03:49 -040010
Jeff Garzik669a5db2006-08-29 18:12:40 -040011#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"
Jeff Garzik8bc3fc42007-05-21 20:26:38 -040021#define DRV_VERSION "0.1.5"
Jeff Garzik669a5db2006-08-29 18:12:40 -040022
23/* here are the offset definitions for the registers */
24
25enum {
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
Jeff Garzik669a5db2006-08-29 18:12:40 -040044/**
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 */
Jeff Garzik85cd7252006-08-31 00:03:49 -040051
Jeff Garzik669a5db2006-08-29 18:12:40 -040052static 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;
Jeff Garzik85cd7252006-08-31 00:03:49 -040059
Jeff Garzik669a5db2006-08-29 18:12:40 -040060 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
Harvey Harrison07633b52008-05-14 16:17:00 -070065 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);
Jeff Garzik85cd7252006-08-31 00:03:49 -040067
Jeff Garzik669a5db2006-08-29 18:12:40 -040068 if (adev->devno == 0) {
69 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
Jeff Garzik85cd7252006-08-31 00:03:49 -040070
Jeff Garzik669a5db2006-08-29 18:12:40 -040071 addr &= ~0x0F; /* Mask bits */
Harvey Harrison07633b52008-05-14 16:17:00 -070072 addr |= clamp_val(t.setup, 0, 15);
Jeff Garzik85cd7252006-08-31 00:03:49 -040073
Jeff Garzik669a5db2006-08-29 18:12:40 -040074 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);
Jeff Garzik85cd7252006-08-31 00:03:49 -040080
Jeff Garzik669a5db2006-08-29 18:12:40 -040081 addr &= ~0xF0; /* Mask bits */
Harvey Harrison07633b52008-05-14 16:17:00 -070082 addr |= (clamp_val(t.setup, 0, 15) << 4);
Jeff Garzik669a5db2006-08-29 18:12:40 -040083
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 */
Jeff Garzik85cd7252006-08-31 00:03:49 -040098
Jeff Garzik669a5db2006-08-29 18:12:40 -040099static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev)
100{
101 int reg = CY82_INDEX_CHANNEL0 + ap->port_no;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400102
Jeff Garzik669a5db2006-08-29 18:12:40 -0400103 /* 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);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400106
Jeff Garzik669a5db2006-08-29 18:12:40 -0400107 /* 0x50 gives the best behaviour on the Alpha's using this chip */
108 outb(CY82_INDEX_TIMEOUT, 0x22);
109 outb(0x50, 0x23);
110}
111
112static struct scsi_host_template cy82c693_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900113 ATA_BMDMA_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -0400114};
115
116static struct ata_port_operations cy82c693_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900117 .inherits = &ata_bmdma_port_ops,
118 .cable_detect = ata_cable_40wire,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400119 .set_piomode = cy82c693_set_piomode,
120 .set_dmamode = cy82c693_set_dmamode,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400121};
Jeff Garzik669a5db2006-08-29 18:12:40 -0400122
123static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
124{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200125 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400126 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400127 .pio_mask = 0x1f,
128 .mwdma_mask = 0x07,
129 .port_ops = &cy82c693_port_ops
130 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200131 const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
Jeff Garzik85cd7252006-08-31 00:03:49 -0400132
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400133 /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
134 For the moment we don't handle the secondary. FIXME */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400135
Jeff Garzik669a5db2006-08-29 18:12:40 -0400136 if (PCI_FUNC(pdev->devfn) != 1)
137 return -ENODEV;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400138
Tejun Heo9363c382008-04-07 22:47:16 +0900139 return ata_pci_sff_init_one(pdev, ppi, &cy82c693_sht, NULL);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400140}
141
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400142static const struct pci_device_id cy82c693[] = {
143 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
144
145 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400146};
147
148static struct pci_driver cy82c693_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400149 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400150 .id_table = cy82c693,
151 .probe = cy82c693_init_one,
Alan30ced0f2006-11-22 16:57:36 +0000152 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900153#ifdef CONFIG_PM
Alan30ced0f2006-11-22 16:57:36 +0000154 .suspend = ata_pci_device_suspend,
155 .resume = ata_pci_device_resume,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900156#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400157};
158
159static int __init cy82c693_init(void)
160{
161 return pci_register_driver(&cy82c693_pci_driver);
162}
163
164
165static void __exit cy82c693_exit(void)
166{
167 pci_unregister_driver(&cy82c693_pci_driver);
168}
169
170
171MODULE_AUTHOR("Alan Cox");
172MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
173MODULE_LICENSE("GPL");
174MODULE_DEVICE_TABLE(pci, cy82c693);
175MODULE_VERSION(DRV_VERSION);
176
177module_init(cy82c693_init);
178module_exit(cy82c693_exit);