2 * Copyright (C) 2000 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2000 Mark Lord <mlord@pobox.com>
4 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
6 * May be copied or modified under the terms of the GNU General Public License
8 * Development of this chipset driver was funded
9 * by the nice folks at National Semiconductor.
12 * CS5530 documentation available from National Semiconductor.
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18 #include <linux/hdreg.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/ide.h>
25 #define DRV_NAME "cs5530"
28 * Here are the standard PIO mode 0-4 timings for each "format".
29 * Format-0 uses fast data reg timings, with slower command reg timings.
30 * Format-1 uses fast timings for all registers, but won't work with all drives.
32 static unsigned int cs5530_pio_timings[2][5] = {
33 {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010},
34 {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}
38 * After chip reset, the PIO timings are set to 0x0000e132, which is not valid.
40 #define CS5530_BAD_PIO(timings) (((timings)&~0x80000000)==0x0000e132)
41 #define CS5530_BASEREG(hwif) (((hwif)->dma_base & ~0xf) + ((hwif)->channel ? 0x30 : 0x20))
44 * cs5530_set_pio_mode - set host controller for PIO mode
46 * @pio: PIO mode number
48 * Handles setting of PIO mode for the chipset.
50 * The init_hwif_cs5530() routine guarantees that all drives
51 * will have valid default PIO timings set up before we get here.
54 static void cs5530_set_pio_mode(ide_drive_t *drive, const u8 pio)
56 unsigned long basereg = CS5530_BASEREG(drive->hwif);
57 unsigned int format = (inl(basereg + 4) >> 31) & 1;
59 outl(cs5530_pio_timings[format][pio], basereg + ((drive->dn & 1)<<3));
63 * cs5530_udma_filter - UDMA filter
66 * cs5530_udma_filter() does UDMA mask filtering for the given drive
67 * taking into the consideration capabilities of the mate device.
69 * The CS5530 specifies that two drives sharing a cable cannot mix
70 * UDMA/MDMA. It has to be one or the other, for the pair, though
71 * different timings can still be chosen for each drive. We could
72 * set the appropriate timing bits on the fly, but that might be
73 * a bit confusing. So, for now we statically handle this requirement
74 * by looking at our mate drive to see what it is capable of, before
75 * choosing a mode for our own drive.
77 * Note: This relies on the fact we never fail from UDMA to MWDMA2
78 * but instead drop to PIO.
81 static u8 cs5530_udma_filter(ide_drive_t *drive)
83 ide_hwif_t *hwif = drive->hwif;
84 ide_drive_t *mate = &hwif->drives[(drive->dn & 1) ^ 1];
85 struct hd_driveid *mateid = mate->id;
86 u8 mask = hwif->ultra_mask;
88 if (mate->present == 0)
91 if ((mateid->capability & 1) && __ide_dma_bad_drive(mate) == 0) {
92 if ((mateid->field_valid & 4) && (mateid->dma_ultra & 7))
94 if ((mateid->field_valid & 2) && (mateid->dma_mword & 7))
101 static void cs5530_set_dma_mode(ide_drive_t *drive, const u8 mode)
103 unsigned long basereg;
104 unsigned int reg, timings = 0;
107 case XFER_UDMA_0: timings = 0x00921250; break;
108 case XFER_UDMA_1: timings = 0x00911140; break;
109 case XFER_UDMA_2: timings = 0x00911030; break;
110 case XFER_MW_DMA_0: timings = 0x00077771; break;
111 case XFER_MW_DMA_1: timings = 0x00012121; break;
112 case XFER_MW_DMA_2: timings = 0x00002020; break;
114 basereg = CS5530_BASEREG(drive->hwif);
115 reg = inl(basereg + 4); /* get drive0 config register */
116 timings |= reg & 0x80000000; /* preserve PIO format bit */
117 if ((drive-> dn & 1) == 0) { /* are we configuring drive0? */
118 outl(timings, basereg + 4); /* write drive0 config register */
120 if (timings & 0x00100000)
121 reg |= 0x00100000; /* enable UDMA timings for both drives */
123 reg &= ~0x00100000; /* disable UDMA timings for both drives */
124 outl(reg, basereg + 4); /* write drive0 config register */
125 outl(timings, basereg + 12); /* write drive1 config register */
130 * init_chipset_5530 - set up 5530 bridge
133 * Initialize the cs5530 bridge for reliable IDE DMA operation.
136 static unsigned int __devinit init_chipset_cs5530(struct pci_dev *dev)
138 struct pci_dev *master_0 = NULL, *cs5530_0 = NULL;
140 if (pci_resource_start(dev, 4) == 0)
144 while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) {
145 switch (dev->device) {
146 case PCI_DEVICE_ID_CYRIX_PCI_MASTER:
147 master_0 = pci_dev_get(dev);
149 case PCI_DEVICE_ID_CYRIX_5530_LEGACY:
150 cs5530_0 = pci_dev_get(dev);
155 printk(KERN_ERR DRV_NAME ": unable to locate PCI MASTER function\n");
159 printk(KERN_ERR DRV_NAME ": unable to locate CS5530 LEGACY function\n");
164 * Enable BusMaster and MemoryWriteAndInvalidate for the cs5530:
165 * --> OR 0x14 into 16-bit PCI COMMAND reg of function 0 of the cs5530
168 pci_set_master(cs5530_0);
169 pci_try_set_mwi(cs5530_0);
172 * Set PCI CacheLineSize to 16-bytes:
173 * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530
176 pci_write_config_byte(cs5530_0, PCI_CACHE_LINE_SIZE, 0x04);
179 * Disable trapping of UDMA register accesses (Win98 hack):
180 * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530
183 pci_write_config_word(cs5530_0, 0xd0, 0x5006);
186 * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus:
187 * The other settings are what is necessary to get the register
188 * into a sane state for IDE DMA operation.
191 pci_write_config_byte(master_0, 0x40, 0x1e);
194 * Set max PCI burst size (16-bytes seems to work best):
195 * 16bytes: set bit-1 at 0x41 (reg value of 0x16)
196 * all others: clear bit-1 at 0x41, and do:
197 * 128bytes: OR 0x00 at 0x41
198 * 256bytes: OR 0x04 at 0x41
199 * 512bytes: OR 0x08 at 0x41
200 * 1024bytes: OR 0x0c at 0x41
203 pci_write_config_byte(master_0, 0x41, 0x14);
206 * These settings are necessary to get the chip
207 * into a sane state for IDE DMA operation.
210 pci_write_config_byte(master_0, 0x42, 0x00);
211 pci_write_config_byte(master_0, 0x43, 0xc1);
214 pci_dev_put(master_0);
215 pci_dev_put(cs5530_0);
220 * init_hwif_cs5530 - initialise an IDE channel
221 * @hwif: IDE to initialize
223 * This gets invoked by the IDE driver once for each channel. It
224 * performs channel-specific pre-initialization before drive probing.
227 static void __devinit init_hwif_cs5530 (ide_hwif_t *hwif)
229 unsigned long basereg;
232 basereg = CS5530_BASEREG(hwif);
233 d0_timings = inl(basereg + 0);
234 if (CS5530_BAD_PIO(d0_timings))
235 outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 0);
236 if (CS5530_BAD_PIO(inl(basereg + 8)))
237 outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 8);
240 static const struct ide_port_ops cs5530_port_ops = {
241 .set_pio_mode = cs5530_set_pio_mode,
242 .set_dma_mode = cs5530_set_dma_mode,
243 .udma_filter = cs5530_udma_filter,
246 static const struct ide_port_info cs5530_chipset __devinitdata = {
248 .init_chipset = init_chipset_cs5530,
249 .init_hwif = init_hwif_cs5530,
250 .port_ops = &cs5530_port_ops,
251 .host_flags = IDE_HFLAG_SERIALIZE |
252 IDE_HFLAG_POST_SET_MODE,
253 .pio_mask = ATA_PIO4,
254 .mwdma_mask = ATA_MWDMA2,
255 .udma_mask = ATA_UDMA2,
258 static int __devinit cs5530_init_one(struct pci_dev *dev, const struct pci_device_id *id)
260 return ide_pci_init_one(dev, &cs5530_chipset, NULL);
263 static const struct pci_device_id cs5530_pci_tbl[] = {
264 { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE), 0 },
267 MODULE_DEVICE_TABLE(pci, cs5530_pci_tbl);
269 static struct pci_driver driver = {
270 .name = "CS5530 IDE",
271 .id_table = cs5530_pci_tbl,
272 .probe = cs5530_init_one,
273 .remove = ide_pci_remove,
276 static int __init cs5530_ide_init(void)
278 return ide_pci_register_driver(&driver);
281 static void __exit cs5530_ide_exit(void)
283 pci_unregister_driver(&driver);
286 module_init(cs5530_ide_init);
287 module_exit(cs5530_ide_exit);
289 MODULE_AUTHOR("Mark Lord");
290 MODULE_DESCRIPTION("PCI driver module for Cyrix/NS 5530 IDE");
291 MODULE_LICENSE("GPL");