2 * linux/drivers/ide/pci/cs5530.c Version 0.74 Jul 28 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 * cs5530_xfer_set_mode - set a new transfer mode at the drive
35 * @drive: drive to tune
38 * Logging wrapper to the IDE driver speed configuration. This can
39 * probably go away now.
42 static int cs5530_set_xfer_mode (ide_drive_t *drive, u8 mode)
44 printk(KERN_DEBUG "%s: cs5530_set_xfer_mode(%s)\n",
45 drive->name, ide_xfer_verbose(mode));
46 return (ide_config_drive_speed(drive, mode));
50 * Here are the standard PIO mode 0-4 timings for each "format".
51 * Format-0 uses fast data reg timings, with slower command reg timings.
52 * Format-1 uses fast timings for all registers, but won't work with all drives.
54 static unsigned int cs5530_pio_timings[2][5] = {
55 {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010},
56 {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}
60 * After chip reset, the PIO timings are set to 0x0000e132, which is not valid.
62 #define CS5530_BAD_PIO(timings) (((timings)&~0x80000000)==0x0000e132)
63 #define CS5530_BASEREG(hwif) (((hwif)->dma_base & ~0xf) + ((hwif)->channel ? 0x30 : 0x20))
65 static void cs5530_tunepio(ide_drive_t *drive, u8 pio)
67 unsigned long basereg = CS5530_BASEREG(drive->hwif);
68 unsigned int format = (inl(basereg + 4) >> 31) & 1;
70 outl(cs5530_pio_timings[format][pio], basereg + ((drive->dn & 1)<<3));
74 * cs5530_set_pio_mode - set PIO mode
76 * @pio: PIO mode number
78 * Handles setting of PIO mode for both the chipset and drive.
80 * The init_hwif_cs5530() routine guarantees that all drives
81 * will have valid default PIO timings set up before we get here.
84 static void cs5530_set_pio_mode(ide_drive_t *drive, const u8 pio)
86 if (cs5530_set_xfer_mode(drive, XFER_PIO_0 + pio) == 0)
87 cs5530_tunepio(drive, pio);
91 * cs5530_udma_filter - UDMA filter
94 * cs5530_udma_filter() does UDMA mask filtering for the given drive
95 * taking into the consideration capabilities of the mate device.
97 * The CS5530 specifies that two drives sharing a cable cannot mix
98 * UDMA/MDMA. It has to be one or the other, for the pair, though
99 * different timings can still be chosen for each drive. We could
100 * set the appropriate timing bits on the fly, but that might be
101 * a bit confusing. So, for now we statically handle this requirement
102 * by looking at our mate drive to see what it is capable of, before
103 * choosing a mode for our own drive.
105 * Note: This relies on the fact we never fail from UDMA to MWDMA2
106 * but instead drop to PIO.
109 static u8 cs5530_udma_filter(ide_drive_t *drive)
111 ide_hwif_t *hwif = drive->hwif;
112 ide_drive_t *mate = &hwif->drives[(drive->dn & 1) ^ 1];
113 struct hd_driveid *mateid = mate->id;
114 u8 mask = hwif->ultra_mask;
116 if (mate->present == 0)
119 if ((mateid->capability & 1) && __ide_dma_bad_drive(mate) == 0) {
120 if ((mateid->field_valid & 4) && (mateid->dma_ultra & 7))
122 if ((mateid->field_valid & 2) && (mateid->dma_mword & 7))
130 * cs5530_config_dma - set DMA/UDMA mode
131 * @drive: drive to tune
133 * cs5530_config_dma() handles setting of DMA/UDMA mode
134 * for both the chipset and drive.
137 static int cs5530_config_dma(ide_drive_t *drive)
139 if (ide_tune_dma(drive))
145 static int cs5530_tune_chipset(ide_drive_t *drive, const u8 mode)
147 unsigned long basereg;
148 unsigned int reg, timings = 0;
151 * Tell the drive to switch to the new mode; abort on failure.
153 if (cs5530_set_xfer_mode(drive, mode))
154 return 1; /* failure */
157 * Now tune the chipset to match the drive:
160 case XFER_UDMA_0: timings = 0x00921250; break;
161 case XFER_UDMA_1: timings = 0x00911140; break;
162 case XFER_UDMA_2: timings = 0x00911030; break;
163 case XFER_MW_DMA_0: timings = 0x00077771; break;
164 case XFER_MW_DMA_1: timings = 0x00012121; break;
165 case XFER_MW_DMA_2: timings = 0x00002020; break;
170 basereg = CS5530_BASEREG(drive->hwif);
171 reg = inl(basereg + 4); /* get drive0 config register */
172 timings |= reg & 0x80000000; /* preserve PIO format bit */
173 if ((drive-> dn & 1) == 0) { /* are we configuring drive0? */
174 outl(timings, basereg + 4); /* write drive0 config register */
176 if (timings & 0x00100000)
177 reg |= 0x00100000; /* enable UDMA timings for both drives */
179 reg &= ~0x00100000; /* disable UDMA timings for both drives */
180 outl(reg, basereg + 4); /* write drive0 config register */
181 outl(timings, basereg + 12); /* write drive1 config register */
184 return 0; /* success */
188 * init_chipset_5530 - set up 5530 bridge
192 * Initialize the cs5530 bridge for reliable IDE DMA operation.
195 static unsigned int __devinit init_chipset_cs5530 (struct pci_dev *dev, const char *name)
197 struct pci_dev *master_0 = NULL, *cs5530_0 = NULL;
200 if (pci_resource_start(dev, 4) == 0)
204 while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) {
205 switch (dev->device) {
206 case PCI_DEVICE_ID_CYRIX_PCI_MASTER:
207 master_0 = pci_dev_get(dev);
209 case PCI_DEVICE_ID_CYRIX_5530_LEGACY:
210 cs5530_0 = pci_dev_get(dev);
215 printk(KERN_ERR "%s: unable to locate PCI MASTER function\n", name);
219 printk(KERN_ERR "%s: unable to locate CS5530 LEGACY function\n", name);
223 spin_lock_irqsave(&ide_lock, flags);
224 /* all CPUs (there should only be one CPU with this chipset) */
227 * Enable BusMaster and MemoryWriteAndInvalidate for the cs5530:
228 * --> OR 0x14 into 16-bit PCI COMMAND reg of function 0 of the cs5530
231 pci_set_master(cs5530_0);
232 pci_try_set_mwi(cs5530_0);
235 * Set PCI CacheLineSize to 16-bytes:
236 * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530
239 pci_write_config_byte(cs5530_0, PCI_CACHE_LINE_SIZE, 0x04);
242 * Disable trapping of UDMA register accesses (Win98 hack):
243 * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530
246 pci_write_config_word(cs5530_0, 0xd0, 0x5006);
249 * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus:
250 * The other settings are what is necessary to get the register
251 * into a sane state for IDE DMA operation.
254 pci_write_config_byte(master_0, 0x40, 0x1e);
257 * Set max PCI burst size (16-bytes seems to work best):
258 * 16bytes: set bit-1 at 0x41 (reg value of 0x16)
259 * all others: clear bit-1 at 0x41, and do:
260 * 128bytes: OR 0x00 at 0x41
261 * 256bytes: OR 0x04 at 0x41
262 * 512bytes: OR 0x08 at 0x41
263 * 1024bytes: OR 0x0c at 0x41
266 pci_write_config_byte(master_0, 0x41, 0x14);
269 * These settings are necessary to get the chip
270 * into a sane state for IDE DMA operation.
273 pci_write_config_byte(master_0, 0x42, 0x00);
274 pci_write_config_byte(master_0, 0x43, 0xc1);
276 spin_unlock_irqrestore(&ide_lock, flags);
279 pci_dev_put(master_0);
280 pci_dev_put(cs5530_0);
285 * init_hwif_cs5530 - initialise an IDE channel
286 * @hwif: IDE to initialize
288 * This gets invoked by the IDE driver once for each channel. It
289 * performs channel-specific pre-initialization before drive probing.
292 static void __devinit init_hwif_cs5530 (ide_hwif_t *hwif)
294 unsigned long basereg;
299 hwif->serialized = hwif->mate->serialized = 1;
301 hwif->set_pio_mode = &cs5530_set_pio_mode;
302 hwif->speedproc = &cs5530_tune_chipset;
304 basereg = CS5530_BASEREG(hwif);
305 d0_timings = inl(basereg + 0);
306 if (CS5530_BAD_PIO(d0_timings)) {
307 /* PIO timings not initialized? */
308 outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 0);
309 if (!hwif->drives[0].autotune)
310 hwif->drives[0].autotune = 1;
311 /* needs autotuning later */
313 if (CS5530_BAD_PIO(inl(basereg + 8))) {
314 /* PIO timings not initialized? */
315 outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 8);
316 if (!hwif->drives[1].autotune)
317 hwif->drives[1].autotune = 1;
318 /* needs autotuning later */
321 if (hwif->dma_base == 0)
325 hwif->ultra_mask = 0x07;
326 hwif->mwdma_mask = 0x07;
328 hwif->udma_filter = cs5530_udma_filter;
329 hwif->ide_dma_check = &cs5530_config_dma;
332 hwif->drives[0].autodma = hwif->autodma;
333 hwif->drives[1].autodma = hwif->autodma;
336 static ide_pci_device_t cs5530_chipset __devinitdata = {
338 .init_chipset = init_chipset_cs5530,
339 .init_hwif = init_hwif_cs5530,
341 .bootable = ON_BOARD,
342 .pio_mask = ATA_PIO4,
345 static int __devinit cs5530_init_one(struct pci_dev *dev, const struct pci_device_id *id)
347 return ide_setup_pci_device(dev, &cs5530_chipset);
350 static struct pci_device_id cs5530_pci_tbl[] = {
351 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
354 MODULE_DEVICE_TABLE(pci, cs5530_pci_tbl);
356 static struct pci_driver driver = {
357 .name = "CS5530 IDE",
358 .id_table = cs5530_pci_tbl,
359 .probe = cs5530_init_one,
362 static int __init cs5530_ide_init(void)
364 return ide_pci_register_driver(&driver);
367 module_init(cs5530_ide_init);
369 MODULE_AUTHOR("Mark Lord");
370 MODULE_DESCRIPTION("PCI driver module for Cyrix/NS 5530 IDE");
371 MODULE_LICENSE("GPL");