Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / ide / cy82c693.c
blob67cbcfa351225b4f7c60dce041562a411d76430e
1 /*
2 * Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
3 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
4 * Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
6 * CYPRESS CY82C693 chipset IDE controller
8 * The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards.
9 */
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/pci.h>
14 #include <linux/ide.h>
15 #include <linux/init.h>
17 #include <asm/io.h>
19 #define DRV_NAME "cy82c693"
22 * NOTE: the value for busmaster timeout is tricky and I got it by
23 * trial and error! By using a to low value will cause DMA timeouts
24 * and drop IDE performance, and by using a to high value will cause
25 * audio playback to scatter.
26 * If you know a better value or how to calc it, please let me know.
29 /* twice the value written in cy82c693ub datasheet */
30 #define BUSMASTER_TIMEOUT 0x50
32 * the value above was tested on my machine and it seems to work okay
35 /* here are the offset definitions for the registers */
36 #define CY82_IDE_CMDREG 0x04
37 #define CY82_IDE_ADDRSETUP 0x48
38 #define CY82_IDE_MASTER_IOR 0x4C
39 #define CY82_IDE_MASTER_IOW 0x4D
40 #define CY82_IDE_SLAVE_IOR 0x4E
41 #define CY82_IDE_SLAVE_IOW 0x4F
42 #define CY82_IDE_MASTER_8BIT 0x50
43 #define CY82_IDE_SLAVE_8BIT 0x51
45 #define CY82_INDEX_PORT 0x22
46 #define CY82_DATA_PORT 0x23
48 #define CY82_INDEX_CHANNEL0 0x30
49 #define CY82_INDEX_CHANNEL1 0x31
50 #define CY82_INDEX_TIMEOUT 0x32
53 * set DMA mode a specific channel for CY82C693
56 static void cy82c693_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
58 const u8 mode = drive->dma_mode;
59 u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
61 index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
63 data = (mode & 3) | (single << 2);
65 outb(index, CY82_INDEX_PORT);
66 outb(data, CY82_DATA_PORT);
69 * note: below we set the value for Bus Master IDE TimeOut Register
70 * I'm not absolutely sure what this does, but it solved my problem
71 * with IDE DMA and sound, so I now can play sound and work with
72 * my IDE driver at the same time :-)
74 * If you know the correct (best) value for this register please
75 * let me know - ASK
78 data = BUSMASTER_TIMEOUT;
79 outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
80 outb(data, CY82_DATA_PORT);
83 static void cy82c693_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
85 struct pci_dev *dev = to_pci_dev(hwif->dev);
86 int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
87 const unsigned long T = 1000000 / bus_speed;
88 unsigned int addrCtrl;
89 struct ide_timing t;
90 u8 time_16, time_8;
92 /* select primary or secondary channel */
93 if (hwif->index > 0) { /* drive is on the secondary channel */
94 dev = pci_get_slot(dev->bus, dev->devfn+1);
95 if (!dev) {
96 printk(KERN_ERR "%s: tune_drive: "
97 "Cannot find secondary interface!\n",
98 drive->name);
99 return;
103 ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
105 time_16 = clamp_val(t.recover - 1, 0, 15) |
106 (clamp_val(t.active - 1, 0, 15) << 4);
107 time_8 = clamp_val(t.act8b - 1, 0, 15) |
108 (clamp_val(t.rec8b - 1, 0, 15) << 4);
110 /* now let's write the clocks registers */
111 if ((drive->dn & 1) == 0) {
113 * set master drive
114 * address setup control register
115 * is 32 bit !!!
117 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
119 addrCtrl &= (~0xF);
120 addrCtrl |= clamp_val(t.setup - 1, 0, 15);
121 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
123 /* now let's set the remaining registers */
124 pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, time_16);
125 pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, time_16);
126 pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, time_8);
127 } else {
129 * set slave drive
130 * address setup control register
131 * is 32 bit !!!
133 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
135 addrCtrl &= (~0xF0);
136 addrCtrl |= (clamp_val(t.setup - 1, 0, 15) << 4);
137 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
139 /* now let's set the remaining registers */
140 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, time_16);
141 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, time_16);
142 pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, time_8);
144 if (hwif->index > 0)
145 pci_dev_put(dev);
148 static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
150 static ide_hwif_t *primary;
151 struct pci_dev *dev = to_pci_dev(hwif->dev);
153 if (PCI_FUNC(dev->devfn) == 1)
154 primary = hwif;
155 else {
156 hwif->mate = primary;
157 hwif->channel = 1;
161 static const struct ide_port_ops cy82c693_port_ops = {
162 .set_pio_mode = cy82c693_set_pio_mode,
163 .set_dma_mode = cy82c693_set_dma_mode,
166 static const struct ide_port_info cy82c693_chipset __devinitdata = {
167 .name = DRV_NAME,
168 .init_iops = init_iops_cy82c693,
169 .port_ops = &cy82c693_port_ops,
170 .host_flags = IDE_HFLAG_SINGLE,
171 .pio_mask = ATA_PIO4,
172 .swdma_mask = ATA_SWDMA2,
173 .mwdma_mask = ATA_MWDMA2,
176 static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)
178 struct pci_dev *dev2;
179 int ret = -ENODEV;
181 /* CY82C693 is more than only a IDE controller.
182 Function 1 is primary IDE channel, function 2 - secondary. */
183 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
184 PCI_FUNC(dev->devfn) == 1) {
185 dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
186 ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL);
187 if (ret)
188 pci_dev_put(dev2);
190 return ret;
193 static void __devexit cy82c693_remove(struct pci_dev *dev)
195 struct ide_host *host = pci_get_drvdata(dev);
196 struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
198 ide_pci_remove(dev);
199 pci_dev_put(dev2);
202 static const struct pci_device_id cy82c693_pci_tbl[] = {
203 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
204 { 0, },
206 MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);
208 static struct pci_driver cy82c693_pci_driver = {
209 .name = "Cypress_IDE",
210 .id_table = cy82c693_pci_tbl,
211 .probe = cy82c693_init_one,
212 .remove = __devexit_p(cy82c693_remove),
213 .suspend = ide_pci_suspend,
214 .resume = ide_pci_resume,
217 static int __init cy82c693_ide_init(void)
219 return ide_pci_register_driver(&cy82c693_pci_driver);
222 static void __exit cy82c693_ide_exit(void)
224 pci_unregister_driver(&cy82c693_pci_driver);
227 module_init(cy82c693_ide_init);
228 module_exit(cy82c693_ide_exit);
230 MODULE_AUTHOR("Andreas Krebs, Andre Hedrick, Bartlomiej Zolnierkiewicz");
231 MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
232 MODULE_LICENSE("GPL");