2 * linux/drivers/ide/pci/cs5530.c Version 0.77 Sep 24 2007
4 * Copyright (C) 2000 Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2000 Mark Lord <mlord@pobox.com>
6 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
8 * May be copied or modified under the terms of the GNU General Public License
10 * Development of this chipset driver was funded
11 * by the nice folks at National Semiconductor.
14 * CS5530 documentation available from National Semiconductor.
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/kernel.h>
20 #include <linux/delay.h>
21 #include <linux/timer.h>
23 #include <linux/ioport.h>
24 #include <linux/blkdev.h>
25 #include <linux/hdreg.h>
26 #include <linux/interrupt.h>
27 #include <linux/pci.h>
28 #include <linux/init.h>
29 #include <linux/ide.h>
34 * Here are the standard PIO mode 0-4 timings for each "format".
35 * Format-0 uses fast data reg timings, with slower command reg timings.
36 * Format-1 uses fast timings for all registers, but won't work with all drives.
38 static unsigned int cs5530_pio_timings[2][5] = {
39 {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010},
40 {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}
44 * After chip reset, the PIO timings are set to 0x0000e132, which is not valid.
46 #define CS5530_BAD_PIO(timings) (((timings)&~0x80000000)==0x0000e132)
47 #define CS5530_BASEREG(hwif) (((hwif)->dma_base & ~0xf) + ((hwif)->channel ? 0x30 : 0x20))
50 * cs5530_set_pio_mode - set host controller for PIO mode
52 * @pio: PIO mode number
54 * Handles setting of PIO mode for the chipset.
56 * The init_hwif_cs5530() routine guarantees that all drives
57 * will have valid default PIO timings set up before we get here.
60 static void cs5530_set_pio_mode(ide_drive_t *drive, const u8 pio)
62 unsigned long basereg = CS5530_BASEREG(drive->hwif);
63 unsigned int format = (inl(basereg + 4) >> 31) & 1;
65 outl(cs5530_pio_timings[format][pio], basereg + ((drive->dn & 1)<<3));
69 * cs5530_udma_filter - UDMA filter
72 * cs5530_udma_filter() does UDMA mask filtering for the given drive
73 * taking into the consideration capabilities of the mate device.
75 * The CS5530 specifies that two drives sharing a cable cannot mix
76 * UDMA/MDMA. It has to be one or the other, for the pair, though
77 * different timings can still be chosen for each drive. We could
78 * set the appropriate timing bits on the fly, but that might be
79 * a bit confusing. So, for now we statically handle this requirement
80 * by looking at our mate drive to see what it is capable of, before
81 * choosing a mode for our own drive.
83 * Note: This relies on the fact we never fail from UDMA to MWDMA2
84 * but instead drop to PIO.
87 static u8 cs5530_udma_filter(ide_drive_t *drive)
89 ide_hwif_t *hwif = drive->hwif;
90 ide_drive_t *mate = &hwif->drives[(drive->dn & 1) ^ 1];
91 struct hd_driveid *mateid = mate->id;
92 u8 mask = hwif->ultra_mask;
94 if (mate->present == 0)
97 if ((mateid->capability & 1) && __ide_dma_bad_drive(mate) == 0) {
98 if ((mateid->field_valid & 4) && (mateid->dma_ultra & 7))
100 if ((mateid->field_valid & 2) && (mateid->dma_mword & 7))
107 static void cs5530_set_dma_mode(ide_drive_t *drive, const u8 mode)
109 unsigned long basereg;
110 unsigned int reg, timings = 0;
113 case XFER_UDMA_0: timings = 0x00921250; break;
114 case XFER_UDMA_1: timings = 0x00911140; break;
115 case XFER_UDMA_2: timings = 0x00911030; break;
116 case XFER_MW_DMA_0: timings = 0x00077771; break;
117 case XFER_MW_DMA_1: timings = 0x00012121; break;
118 case XFER_MW_DMA_2: timings = 0x00002020; break;
122 basereg = CS5530_BASEREG(drive->hwif);
123 reg = inl(basereg + 4); /* get drive0 config register */
124 timings |= reg & 0x80000000; /* preserve PIO format bit */
125 if ((drive-> dn & 1) == 0) { /* are we configuring drive0? */
126 outl(timings, basereg + 4); /* write drive0 config register */
128 if (timings & 0x00100000)
129 reg |= 0x00100000; /* enable UDMA timings for both drives */
131 reg &= ~0x00100000; /* disable UDMA timings for both drives */
132 outl(reg, basereg + 4); /* write drive0 config register */
133 outl(timings, basereg + 12); /* write drive1 config register */
138 * init_chipset_5530 - set up 5530 bridge
142 * Initialize the cs5530 bridge for reliable IDE DMA operation.
145 static unsigned int __devinit init_chipset_cs5530 (struct pci_dev *dev, const char *name)
147 struct pci_dev *master_0 = NULL, *cs5530_0 = NULL;
149 if (pci_resource_start(dev, 4) == 0)
153 while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) {
154 switch (dev->device) {
155 case PCI_DEVICE_ID_CYRIX_PCI_MASTER:
156 master_0 = pci_dev_get(dev);
158 case PCI_DEVICE_ID_CYRIX_5530_LEGACY:
159 cs5530_0 = pci_dev_get(dev);
164 printk(KERN_ERR "%s: unable to locate PCI MASTER function\n", name);
168 printk(KERN_ERR "%s: unable to locate CS5530 LEGACY function\n", name);
173 * Enable BusMaster and MemoryWriteAndInvalidate for the cs5530:
174 * --> OR 0x14 into 16-bit PCI COMMAND reg of function 0 of the cs5530
177 pci_set_master(cs5530_0);
178 pci_try_set_mwi(cs5530_0);
181 * Set PCI CacheLineSize to 16-bytes:
182 * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530
185 pci_write_config_byte(cs5530_0, PCI_CACHE_LINE_SIZE, 0x04);
188 * Disable trapping of UDMA register accesses (Win98 hack):
189 * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530
192 pci_write_config_word(cs5530_0, 0xd0, 0x5006);
195 * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus:
196 * The other settings are what is necessary to get the register
197 * into a sane state for IDE DMA operation.
200 pci_write_config_byte(master_0, 0x40, 0x1e);
203 * Set max PCI burst size (16-bytes seems to work best):
204 * 16bytes: set bit-1 at 0x41 (reg value of 0x16)
205 * all others: clear bit-1 at 0x41, and do:
206 * 128bytes: OR 0x00 at 0x41
207 * 256bytes: OR 0x04 at 0x41
208 * 512bytes: OR 0x08 at 0x41
209 * 1024bytes: OR 0x0c at 0x41
212 pci_write_config_byte(master_0, 0x41, 0x14);
215 * These settings are necessary to get the chip
216 * into a sane state for IDE DMA operation.
219 pci_write_config_byte(master_0, 0x42, 0x00);
220 pci_write_config_byte(master_0, 0x43, 0xc1);
223 pci_dev_put(master_0);
224 pci_dev_put(cs5530_0);
229 * init_hwif_cs5530 - initialise an IDE channel
230 * @hwif: IDE to initialize
232 * This gets invoked by the IDE driver once for each channel. It
233 * performs channel-specific pre-initialization before drive probing.
236 static void __devinit init_hwif_cs5530 (ide_hwif_t *hwif)
238 unsigned long basereg;
241 hwif->set_pio_mode = &cs5530_set_pio_mode;
242 hwif->set_dma_mode = &cs5530_set_dma_mode;
244 basereg = CS5530_BASEREG(hwif);
245 d0_timings = inl(basereg + 0);
246 if (CS5530_BAD_PIO(d0_timings))
247 outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 0);
248 if (CS5530_BAD_PIO(inl(basereg + 8)))
249 outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 8);
251 if (hwif->dma_base == 0)
254 hwif->udma_filter = cs5530_udma_filter;
257 static const struct ide_port_info cs5530_chipset __devinitdata = {
259 .init_chipset = init_chipset_cs5530,
260 .init_hwif = init_hwif_cs5530,
261 .host_flags = IDE_HFLAG_SERIALIZE |
262 IDE_HFLAG_POST_SET_MODE |
264 .pio_mask = ATA_PIO4,
265 .mwdma_mask = ATA_MWDMA2,
266 .udma_mask = ATA_UDMA2,
269 static int __devinit cs5530_init_one(struct pci_dev *dev, const struct pci_device_id *id)
271 return ide_setup_pci_device(dev, &cs5530_chipset);
274 static const struct pci_device_id cs5530_pci_tbl[] = {
275 { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE), 0 },
278 MODULE_DEVICE_TABLE(pci, cs5530_pci_tbl);
280 static struct pci_driver driver = {
281 .name = "CS5530 IDE",
282 .id_table = cs5530_pci_tbl,
283 .probe = cs5530_init_one,
286 static int __init cs5530_ide_init(void)
288 return ide_pci_register_driver(&driver);
291 module_init(cs5530_ide_init);
293 MODULE_AUTHOR("Mark Lord");
294 MODULE_DESCRIPTION("PCI driver module for Cyrix/NS 5530 IDE");
295 MODULE_LICENSE("GPL");