2 * Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
3 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
5 * CYPRESS CY82C693 chipset IDE controller
7 * The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards.
8 * Writing the driver was quite simple, since most of the job is
9 * done by the generic pci-ide support.
10 * The hard part was finding the CY82C693's datasheet on Cypress's
11 * web page :-(. But Altavista solved this problem :-).
15 * - I recently got a 16.8G IBM DTTA, so I was able to test it with
16 * a large and fast disk - the results look great, so I'd say the
17 * driver is working fine :-)
18 * hdparm -t reports 8.17 MB/sec at about 6% CPU usage for the DTTA
19 * - this is my first linux driver, so there's probably a lot of room
20 * for optimizations and bug fixing, so feel free to do it.
21 * - if using PIO mode it's a good idea to set the PIO mode and
22 * 32-bit I/O support (if possible), e.g. hdparm -p2 -c1 /dev/hda
23 * - I had some problems with my IBM DHEA with PIO modes < 2
24 * (lost interrupts) ?????
25 * - first tests with DMA look okay, they seem to work, but there is a
26 * problem with sound - the BusMaster IDE TimeOut should fixed this
29 * AMH@1999-08-24: v0.34 init_cy82c693_chip moved to pci_init_cy82c693
30 * ASK@1999-01-23: v0.33 made a few minor code clean ups
31 * removed DMA clock speed setting by default
33 * ASK@1998-11-01: v0.32 added support to set BusMaster IDE TimeOut
34 * added support to set DMA Controller Clock Speed
35 * ASK@1998-10-31: v0.31 fixed problem with setting to high DMA modes
37 * ASK@1998-10-29: v0.3 added support to set DMA modes
38 * ASK@1998-10-28: v0.2 added support to set PIO modes
39 * ASK@1998-10-27: v0.1 first version - chipset detection
43 #include <linux/module.h>
44 #include <linux/types.h>
45 #include <linux/pci.h>
46 #include <linux/ide.h>
47 #include <linux/init.h>
51 #define DRV_NAME "cy82c693"
53 /* the current version */
54 #define CY82_VERSION "CY82C693U driver v0.34 99-13-12 Andreas S. Krebs (akrebs@altavista.net)"
57 * The following are used to debug the driver.
59 #define CY82C693_DEBUG_LOGS 0
60 #define CY82C693_DEBUG_INFO 0
62 /* define CY82C693_SETDMA_CLOCK to set DMA Controller Clock Speed to ATCLK */
63 #undef CY82C693_SETDMA_CLOCK
66 * NOTE: the value for busmaster timeout is tricky and I got it by
67 * trial and error! By using a to low value will cause DMA timeouts
68 * and drop IDE performance, and by using a to high value will cause
69 * audio playback to scatter.
70 * If you know a better value or how to calc it, please let me know.
73 /* twice the value written in cy82c693ub datasheet */
74 #define BUSMASTER_TIMEOUT 0x50
76 * the value above was tested on my machine and it seems to work okay
79 /* here are the offset definitions for the registers */
80 #define CY82_IDE_CMDREG 0x04
81 #define CY82_IDE_ADDRSETUP 0x48
82 #define CY82_IDE_MASTER_IOR 0x4C
83 #define CY82_IDE_MASTER_IOW 0x4D
84 #define CY82_IDE_SLAVE_IOR 0x4E
85 #define CY82_IDE_SLAVE_IOW 0x4F
86 #define CY82_IDE_MASTER_8BIT 0x50
87 #define CY82_IDE_SLAVE_8BIT 0x51
89 #define CY82_INDEX_PORT 0x22
90 #define CY82_DATA_PORT 0x23
92 #define CY82_INDEX_CTRLREG1 0x01
93 #define CY82_INDEX_CHANNEL0 0x30
94 #define CY82_INDEX_CHANNEL1 0x31
95 #define CY82_INDEX_TIMEOUT 0x32
97 /* the min and max PCI bus speed in MHz - from datasheet */
98 #define CY82C963_MIN_BUS_SPEED 25
99 #define CY82C963_MAX_BUS_SPEED 33
101 /* the struct for the PIO mode timings */
102 typedef struct pio_clocks_s {
103 u8 address_time; /* Address setup (clocks) */
104 u8 time_16r; /* clocks for 16bit IOR (0xF0=Active/data, 0x0F=Recovery) */
105 u8 time_16w; /* clocks for 16bit IOW (0xF0=Active/data, 0x0F=Recovery) */
106 u8 time_8; /* clocks for 8bit (0xF0=Active/data, 0x0F=Recovery) */
110 * calc clocks using bus_speed
111 * returns (rounded up) time in bus clocks for time in ns
113 static int calc_clk(int time, int bus_speed)
117 clocks = (time*bus_speed+999)/1000 - 1;
129 * compute the values for the clock registers for PIO
130 * mode and pci_clk [MHz] speed
132 * NOTE: for mode 0,1 and 2 drives 8-bit IDE command control registers are used
133 * for mode 3 and 4 drives 8 and 16-bit timings are the same
136 static void compute_clocks(u8 pio, pio_clocks_t *p_pclk)
138 struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
140 int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
142 /* we don't check against CY82C693's min and max speed,
143 * so you can play with the idebus=xx parameter
146 /* let's calc the address setup time clocks */
147 p_pclk->address_time = (u8)calc_clk(t->setup, bus_speed);
149 /* let's calc the active and recovery time clocks */
150 clk1 = calc_clk(t->active, bus_speed);
152 /* calc recovery timing */
153 clk2 = t->cycle - t->active - t->setup;
155 clk2 = calc_clk(clk2, bus_speed);
157 clk1 = (clk1<<4)|clk2; /* combine active and recovery clocks */
159 /* note: we use the same values for 16bit IOR and IOW
160 * those are all the same, since I don't have other
161 * timings than those from ide-lib.c
164 p_pclk->time_16r = (u8)clk1;
165 p_pclk->time_16w = (u8)clk1;
167 /* what are good values for 8bit ?? */
168 p_pclk->time_8 = (u8)clk1;
172 * set DMA mode a specific channel for CY82C693
175 static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode)
177 ide_hwif_t *hwif = drive->hwif;
178 u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
180 index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
182 #if CY82C693_DEBUG_LOGS
183 /* for debug let's show the previous values */
185 outb(index, CY82_INDEX_PORT);
186 data = inb(CY82_DATA_PORT);
188 printk(KERN_INFO "%s (ch=%d, dev=%d): DMA mode is %d (single=%d)\n",
189 drive->name, HWIF(drive)->channel, drive->select.b.unit,
190 (data&0x3), ((data>>2)&1));
191 #endif /* CY82C693_DEBUG_LOGS */
193 data = (mode & 3) | (single << 2);
195 outb(index, CY82_INDEX_PORT);
196 outb(data, CY82_DATA_PORT);
198 #if CY82C693_DEBUG_INFO
199 printk(KERN_INFO "%s (ch=%d, dev=%d): set DMA mode to %d (single=%d)\n",
200 drive->name, HWIF(drive)->channel, drive->select.b.unit,
202 #endif /* CY82C693_DEBUG_INFO */
205 * note: below we set the value for Bus Master IDE TimeOut Register
206 * I'm not absolutly sure what this does, but it solved my problem
207 * with IDE DMA and sound, so I now can play sound and work with
208 * my IDE driver at the same time :-)
210 * If you know the correct (best) value for this register please
214 data = BUSMASTER_TIMEOUT;
215 outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
216 outb(data, CY82_DATA_PORT);
218 #if CY82C693_DEBUG_INFO
219 printk(KERN_INFO "%s: Set IDE Bus Master TimeOut Register to 0x%X\n",
221 #endif /* CY82C693_DEBUG_INFO */
224 static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio)
226 ide_hwif_t *hwif = HWIF(drive);
227 struct pci_dev *dev = to_pci_dev(hwif->dev);
229 unsigned int addrCtrl;
231 /* select primary or secondary channel */
232 if (hwif->index > 0) { /* drive is on the secondary channel */
233 dev = pci_get_slot(dev->bus, dev->devfn+1);
235 printk(KERN_ERR "%s: tune_drive: "
236 "Cannot find secondary interface!\n",
242 #if CY82C693_DEBUG_LOGS
243 /* for debug let's show the register values */
245 if (drive->select.b.unit == 0) {
247 * get master drive registers
248 * address setup control register
251 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
254 /* now let's get the remaining registers */
255 pci_read_config_byte(dev, CY82_IDE_MASTER_IOR, &pclk.time_16r);
256 pci_read_config_byte(dev, CY82_IDE_MASTER_IOW, &pclk.time_16w);
257 pci_read_config_byte(dev, CY82_IDE_MASTER_8BIT, &pclk.time_8);
260 * set slave drive registers
261 * address setup control register
264 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
269 /* now let's get the remaining registers */
270 pci_read_config_byte(dev, CY82_IDE_SLAVE_IOR, &pclk.time_16r);
271 pci_read_config_byte(dev, CY82_IDE_SLAVE_IOW, &pclk.time_16w);
272 pci_read_config_byte(dev, CY82_IDE_SLAVE_8BIT, &pclk.time_8);
275 printk(KERN_INFO "%s (ch=%d, dev=%d): PIO timing is "
276 "(addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n",
277 drive->name, hwif->channel, drive->select.b.unit,
278 addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8);
279 #endif /* CY82C693_DEBUG_LOGS */
281 /* let's calc the values for this PIO mode */
282 compute_clocks(pio, &pclk);
284 /* now let's write the clocks registers */
285 if (drive->select.b.unit == 0) {
288 * address setup control register
291 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
294 addrCtrl |= (unsigned int)pclk.address_time;
295 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
297 /* now let's set the remaining registers */
298 pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, pclk.time_16r);
299 pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, pclk.time_16w);
300 pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, pclk.time_8);
306 * address setup control register
309 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
312 addrCtrl |= ((unsigned int)pclk.address_time<<4);
313 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
315 /* now let's set the remaining registers */
316 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, pclk.time_16r);
317 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, pclk.time_16w);
318 pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, pclk.time_8);
324 #if CY82C693_DEBUG_INFO
325 printk(KERN_INFO "%s (ch=%d, dev=%d): set PIO timing to "
326 "(addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n",
327 drive->name, hwif->channel, drive->select.b.unit,
328 addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8);
329 #endif /* CY82C693_DEBUG_INFO */
333 * this function is called during init and is used to setup the cy82c693 chip
335 static unsigned int __devinit init_chipset_cy82c693(struct pci_dev *dev)
337 if (PCI_FUNC(dev->devfn) != 1)
340 #ifdef CY82C693_SETDMA_CLOCK
342 #endif /* CY82C693_SETDMA_CLOCK */
344 /* write info about this verion of the driver */
345 printk(KERN_INFO CY82_VERSION "\n");
347 #ifdef CY82C693_SETDMA_CLOCK
348 /* okay let's set the DMA clock speed */
350 outb(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT);
351 data = inb(CY82_DATA_PORT);
353 #if CY82C693_DEBUG_INFO
354 printk(KERN_INFO DRV_NAME ": Peripheral Configuration Register: 0x%X\n",
356 #endif /* CY82C693_DEBUG_INFO */
359 * for some reason sometimes the DMA controller
360 * speed is set to ATCLK/2 ???? - we fix this here
362 * note: i don't know what causes this strange behaviour,
363 * but even changing the dma speed doesn't solve it :-(
364 * the ide performance is still only half the normal speed
366 * if anybody knows what goes wrong with my machine, please
372 outb(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT);
373 outb(data, CY82_DATA_PORT);
375 #if CY82C693_DEBUG_INFO
376 printk(KERN_INFO ": New Peripheral Configuration Register: 0x%X\n",
378 #endif /* CY82C693_DEBUG_INFO */
380 #endif /* CY82C693_SETDMA_CLOCK */
384 static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
386 static ide_hwif_t *primary;
387 struct pci_dev *dev = to_pci_dev(hwif->dev);
389 if (PCI_FUNC(dev->devfn) == 1)
392 hwif->mate = primary;
397 static const struct ide_port_ops cy82c693_port_ops = {
398 .set_pio_mode = cy82c693_set_pio_mode,
399 .set_dma_mode = cy82c693_set_dma_mode,
402 static const struct ide_port_info cy82c693_chipset __devinitdata = {
404 .init_chipset = init_chipset_cy82c693,
405 .init_iops = init_iops_cy82c693,
406 .port_ops = &cy82c693_port_ops,
407 .chipset = ide_cy82c693,
408 .host_flags = IDE_HFLAG_SINGLE,
409 .pio_mask = ATA_PIO4,
410 .swdma_mask = ATA_SWDMA2,
411 .mwdma_mask = ATA_MWDMA2,
414 static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)
416 struct pci_dev *dev2;
419 /* CY82C693 is more than only a IDE controller.
420 Function 1 is primary IDE channel, function 2 - secondary. */
421 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
422 PCI_FUNC(dev->devfn) == 1) {
423 dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
424 ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL);
431 static void __devexit cy82c693_remove(struct pci_dev *dev)
433 struct ide_host *host = pci_get_drvdata(dev);
434 struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
440 static const struct pci_device_id cy82c693_pci_tbl[] = {
441 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
444 MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);
446 static struct pci_driver driver = {
447 .name = "Cypress_IDE",
448 .id_table = cy82c693_pci_tbl,
449 .probe = cy82c693_init_one,
450 .remove = cy82c693_remove,
453 static int __init cy82c693_ide_init(void)
455 return ide_pci_register_driver(&driver);
458 static void __exit cy82c693_ide_exit(void)
460 pci_unregister_driver(&driver);
463 module_init(cy82c693_ide_init);
464 module_exit(cy82c693_ide_exit);
466 MODULE_AUTHOR("Andreas Krebs, Andre Hedrick");
467 MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
468 MODULE_LICENSE("GPL");