1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
4 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
5 * Copyright (C) 2007-2011 Bartlomiej Zolnierkiewicz
7 * CYPRESS CY82C693 chipset IDE controller
9 * The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards.
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/pci.h>
15 #include <linux/ide.h>
16 #include <linux/init.h>
20 #define DRV_NAME "cy82c693"
23 * NOTE: the value for busmaster timeout is tricky and I got it by
24 * trial and error! By using a to low value will cause DMA timeouts
25 * and drop IDE performance, and by using a to high value will cause
26 * audio playback to scatter.
27 * If you know a better value or how to calc it, please let me know.
30 /* twice the value written in cy82c693ub datasheet */
31 #define BUSMASTER_TIMEOUT 0x50
33 * the value above was tested on my machine and it seems to work okay
36 /* here are the offset definitions for the registers */
37 #define CY82_IDE_CMDREG 0x04
38 #define CY82_IDE_ADDRSETUP 0x48
39 #define CY82_IDE_MASTER_IOR 0x4C
40 #define CY82_IDE_MASTER_IOW 0x4D
41 #define CY82_IDE_SLAVE_IOR 0x4E
42 #define CY82_IDE_SLAVE_IOW 0x4F
43 #define CY82_IDE_MASTER_8BIT 0x50
44 #define CY82_IDE_SLAVE_8BIT 0x51
46 #define CY82_INDEX_PORT 0x22
47 #define CY82_DATA_PORT 0x23
49 #define CY82_INDEX_CHANNEL0 0x30
50 #define CY82_INDEX_CHANNEL1 0x31
51 #define CY82_INDEX_TIMEOUT 0x32
54 * set DMA mode a specific channel for CY82C693
57 static void cy82c693_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
59 const u8 mode = drive->dma_mode;
60 u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
62 index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
64 data = (mode & 3) | (single << 2);
66 outb(index, CY82_INDEX_PORT);
67 outb(data, CY82_DATA_PORT);
70 * note: below we set the value for Bus Master IDE TimeOut Register
71 * I'm not absolutely sure what this does, but it solved my problem
72 * with IDE DMA and sound, so I now can play sound and work with
73 * my IDE driver at the same time :-)
75 * If you know the correct (best) value for this register please
79 data = BUSMASTER_TIMEOUT;
80 outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
81 outb(data, CY82_DATA_PORT);
84 static void cy82c693_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
86 struct pci_dev *dev = to_pci_dev(hwif->dev);
87 int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
88 const unsigned long T = 1000000 / bus_speed;
89 unsigned int addrCtrl;
93 /* select primary or secondary channel */
94 if (drive->dn > 1) { /* drive is on the secondary channel */
95 dev = pci_get_slot(dev->bus, dev->devfn+1);
97 printk(KERN_ERR "%s: tune_drive: "
98 "Cannot find secondary interface!\n",
104 ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
106 time_16 = clamp_val(t.recover - 1, 0, 15) |
107 (clamp_val(t.active - 1, 0, 15) << 4);
108 time_8 = clamp_val(t.act8b - 1, 0, 15) |
109 (clamp_val(t.rec8b - 1, 0, 15) << 4);
111 /* now let's write the clocks registers */
112 if ((drive->dn & 1) == 0) {
115 * address setup control register
118 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
121 addrCtrl |= clamp_val(t.setup - 1, 0, 15);
122 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
124 /* now let's set the remaining registers */
125 pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, time_16);
126 pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, time_16);
127 pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, time_8);
131 * address setup control register
134 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
137 addrCtrl |= (clamp_val(t.setup - 1, 0, 15) << 4);
138 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
140 /* now let's set the remaining registers */
141 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, time_16);
142 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, time_16);
143 pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, time_8);
149 static void init_iops_cy82c693(ide_hwif_t *hwif)
151 static ide_hwif_t *primary;
152 struct pci_dev *dev = to_pci_dev(hwif->dev);
154 if (PCI_FUNC(dev->devfn) == 1)
157 hwif->mate = primary;
162 static const struct ide_port_ops cy82c693_port_ops = {
163 .set_pio_mode = cy82c693_set_pio_mode,
164 .set_dma_mode = cy82c693_set_dma_mode,
167 static const struct ide_port_info cy82c693_chipset = {
169 .init_iops = init_iops_cy82c693,
170 .port_ops = &cy82c693_port_ops,
171 .host_flags = IDE_HFLAG_SINGLE,
172 .pio_mask = ATA_PIO4,
173 .swdma_mask = ATA_SWDMA2,
174 .mwdma_mask = ATA_MWDMA2,
177 static int cy82c693_init_one(struct pci_dev *dev,
178 const struct pci_device_id *id)
180 struct pci_dev *dev2;
183 /* CY82C693 is more than only a IDE controller.
184 Function 1 is primary IDE channel, function 2 - secondary. */
185 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
186 PCI_FUNC(dev->devfn) == 1) {
187 dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
188 ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL);
195 static void cy82c693_remove(struct pci_dev *dev)
197 struct ide_host *host = pci_get_drvdata(dev);
198 struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
204 static const struct pci_device_id cy82c693_pci_tbl[] = {
205 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
208 MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);
210 static struct pci_driver cy82c693_pci_driver = {
211 .name = "Cypress_IDE",
212 .id_table = cy82c693_pci_tbl,
213 .probe = cy82c693_init_one,
214 .remove = cy82c693_remove,
215 .suspend = ide_pci_suspend,
216 .resume = ide_pci_resume,
219 static int __init cy82c693_ide_init(void)
221 return ide_pci_register_driver(&cy82c693_pci_driver);
224 static void __exit cy82c693_ide_exit(void)
226 pci_unregister_driver(&cy82c693_pci_driver);
229 module_init(cy82c693_ide_init);
230 module_exit(cy82c693_ide_exit);
232 MODULE_AUTHOR("Andreas Krebs, Andre Hedrick, Bartlomiej Zolnierkiewicz");
233 MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
234 MODULE_LICENSE("GPL");