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 /* the current version */
52 #define CY82_VERSION "CY82C693U driver v0.34 99-13-12 Andreas S. Krebs (akrebs@altavista.net)"
55 * The following are used to debug the driver.
57 #define CY82C693_DEBUG_LOGS 0
58 #define CY82C693_DEBUG_INFO 0
60 /* define CY82C693_SETDMA_CLOCK to set DMA Controller Clock Speed to ATCLK */
61 #undef CY82C693_SETDMA_CLOCK
64 * NOTE: the value for busmaster timeout is tricky and I got it by
65 * trial and error! By using a to low value will cause DMA timeouts
66 * and drop IDE performance, and by using a to high value will cause
67 * audio playback to scatter.
68 * If you know a better value or how to calc it, please let me know.
71 /* twice the value written in cy82c693ub datasheet */
72 #define BUSMASTER_TIMEOUT 0x50
74 * the value above was tested on my machine and it seems to work okay
77 /* here are the offset definitions for the registers */
78 #define CY82_IDE_CMDREG 0x04
79 #define CY82_IDE_ADDRSETUP 0x48
80 #define CY82_IDE_MASTER_IOR 0x4C
81 #define CY82_IDE_MASTER_IOW 0x4D
82 #define CY82_IDE_SLAVE_IOR 0x4E
83 #define CY82_IDE_SLAVE_IOW 0x4F
84 #define CY82_IDE_MASTER_8BIT 0x50
85 #define CY82_IDE_SLAVE_8BIT 0x51
87 #define CY82_INDEX_PORT 0x22
88 #define CY82_DATA_PORT 0x23
90 #define CY82_INDEX_CTRLREG1 0x01
91 #define CY82_INDEX_CHANNEL0 0x30
92 #define CY82_INDEX_CHANNEL1 0x31
93 #define CY82_INDEX_TIMEOUT 0x32
95 /* the min and max PCI bus speed in MHz - from datasheet */
96 #define CY82C963_MIN_BUS_SPEED 25
97 #define CY82C963_MAX_BUS_SPEED 33
99 /* the struct for the PIO mode timings */
100 typedef struct pio_clocks_s {
101 u8 address_time; /* Address setup (clocks) */
102 u8 time_16r; /* clocks for 16bit IOR (0xF0=Active/data, 0x0F=Recovery) */
103 u8 time_16w; /* clocks for 16bit IOW (0xF0=Active/data, 0x0F=Recovery) */
104 u8 time_8; /* clocks for 8bit (0xF0=Active/data, 0x0F=Recovery) */
108 * calc clocks using bus_speed
109 * returns (rounded up) time in bus clocks for time in ns
111 static int calc_clk(int time, int bus_speed)
115 clocks = (time*bus_speed+999)/1000 - 1;
127 * compute the values for the clock registers for PIO
128 * mode and pci_clk [MHz] speed
130 * NOTE: for mode 0,1 and 2 drives 8-bit IDE command control registers are used
131 * for mode 3 and 4 drives 8 and 16-bit timings are the same
134 static void compute_clocks(u8 pio, pio_clocks_t *p_pclk)
136 struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
138 int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
140 /* we don't check against CY82C693's min and max speed,
141 * so you can play with the idebus=xx parameter
144 /* let's calc the address setup time clocks */
145 p_pclk->address_time = (u8)calc_clk(t->setup, bus_speed);
147 /* let's calc the active and recovery time clocks */
148 clk1 = calc_clk(t->active, bus_speed);
150 /* calc recovery timing */
151 clk2 = t->cycle - t->active - t->setup;
153 clk2 = calc_clk(clk2, bus_speed);
155 clk1 = (clk1<<4)|clk2; /* combine active and recovery clocks */
157 /* note: we use the same values for 16bit IOR and IOW
158 * those are all the same, since I don't have other
159 * timings than those from ide-lib.c
162 p_pclk->time_16r = (u8)clk1;
163 p_pclk->time_16w = (u8)clk1;
165 /* what are good values for 8bit ?? */
166 p_pclk->time_8 = (u8)clk1;
170 * set DMA mode a specific channel for CY82C693
173 static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode)
175 ide_hwif_t *hwif = drive->hwif;
176 u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
178 index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
180 #if CY82C693_DEBUG_LOGS
181 /* for debug let's show the previous values */
183 outb(index, CY82_INDEX_PORT);
184 data = inb(CY82_DATA_PORT);
186 printk(KERN_INFO "%s (ch=%d, dev=%d): DMA mode is %d (single=%d)\n",
187 drive->name, HWIF(drive)->channel, drive->select.b.unit,
188 (data&0x3), ((data>>2)&1));
189 #endif /* CY82C693_DEBUG_LOGS */
191 data = (mode & 3) | (single << 2);
193 outb(index, CY82_INDEX_PORT);
194 outb(data, CY82_DATA_PORT);
196 #if CY82C693_DEBUG_INFO
197 printk(KERN_INFO "%s (ch=%d, dev=%d): set DMA mode to %d (single=%d)\n",
198 drive->name, HWIF(drive)->channel, drive->select.b.unit,
200 #endif /* CY82C693_DEBUG_INFO */
203 * note: below we set the value for Bus Master IDE TimeOut Register
204 * I'm not absolutly sure what this does, but it solved my problem
205 * with IDE DMA and sound, so I now can play sound and work with
206 * my IDE driver at the same time :-)
208 * If you know the correct (best) value for this register please
212 data = BUSMASTER_TIMEOUT;
213 outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
214 outb(data, CY82_DATA_PORT);
216 #if CY82C693_DEBUG_INFO
217 printk(KERN_INFO "%s: Set IDE Bus Master TimeOut Register to 0x%X\n",
219 #endif /* CY82C693_DEBUG_INFO */
222 static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio)
224 ide_hwif_t *hwif = HWIF(drive);
225 struct pci_dev *dev = to_pci_dev(hwif->dev);
227 unsigned int addrCtrl;
229 /* select primary or secondary channel */
230 if (hwif->index > 0) { /* drive is on the secondary channel */
231 dev = pci_get_slot(dev->bus, dev->devfn+1);
233 printk(KERN_ERR "%s: tune_drive: "
234 "Cannot find secondary interface!\n",
240 #if CY82C693_DEBUG_LOGS
241 /* for debug let's show the register values */
243 if (drive->select.b.unit == 0) {
245 * get master drive registers
246 * address setup control register
249 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
252 /* now let's get the remaining registers */
253 pci_read_config_byte(dev, CY82_IDE_MASTER_IOR, &pclk.time_16r);
254 pci_read_config_byte(dev, CY82_IDE_MASTER_IOW, &pclk.time_16w);
255 pci_read_config_byte(dev, CY82_IDE_MASTER_8BIT, &pclk.time_8);
258 * set slave drive registers
259 * address setup control register
262 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
267 /* now let's get the remaining registers */
268 pci_read_config_byte(dev, CY82_IDE_SLAVE_IOR, &pclk.time_16r);
269 pci_read_config_byte(dev, CY82_IDE_SLAVE_IOW, &pclk.time_16w);
270 pci_read_config_byte(dev, CY82_IDE_SLAVE_8BIT, &pclk.time_8);
273 printk(KERN_INFO "%s (ch=%d, dev=%d): PIO timing is "
274 "(addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n",
275 drive->name, hwif->channel, drive->select.b.unit,
276 addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8);
277 #endif /* CY82C693_DEBUG_LOGS */
279 /* let's calc the values for this PIO mode */
280 compute_clocks(pio, &pclk);
282 /* now let's write the clocks registers */
283 if (drive->select.b.unit == 0) {
286 * address setup control register
289 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
292 addrCtrl |= (unsigned int)pclk.address_time;
293 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
295 /* now let's set the remaining registers */
296 pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, pclk.time_16r);
297 pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, pclk.time_16w);
298 pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, pclk.time_8);
304 * address setup control register
307 pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
310 addrCtrl |= ((unsigned int)pclk.address_time<<4);
311 pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
313 /* now let's set the remaining registers */
314 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, pclk.time_16r);
315 pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, pclk.time_16w);
316 pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, pclk.time_8);
322 #if CY82C693_DEBUG_INFO
323 printk(KERN_INFO "%s (ch=%d, dev=%d): set PIO timing to "
324 "(addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n",
325 drive->name, hwif->channel, drive->select.b.unit,
326 addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8);
327 #endif /* CY82C693_DEBUG_INFO */
331 * this function is called during init and is used to setup the cy82c693 chip
333 static unsigned int __devinit init_chipset_cy82c693(struct pci_dev *dev, const char *name)
335 if (PCI_FUNC(dev->devfn) != 1)
338 #ifdef CY82C693_SETDMA_CLOCK
340 #endif /* CY82C693_SETDMA_CLOCK */
342 /* write info about this verion of the driver */
343 printk(KERN_INFO CY82_VERSION "\n");
345 #ifdef CY82C693_SETDMA_CLOCK
346 /* okay let's set the DMA clock speed */
348 outb(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT);
349 data = inb(CY82_DATA_PORT);
351 #if CY82C693_DEBUG_INFO
352 printk(KERN_INFO "%s: Peripheral Configuration Register: 0x%X\n",
354 #endif /* CY82C693_DEBUG_INFO */
357 * for some reason sometimes the DMA controller
358 * speed is set to ATCLK/2 ???? - we fix this here
360 * note: i don't know what causes this strange behaviour,
361 * but even changing the dma speed doesn't solve it :-(
362 * the ide performance is still only half the normal speed
364 * if anybody knows what goes wrong with my machine, please
370 outb(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT);
371 outb(data, CY82_DATA_PORT);
373 #if CY82C693_DEBUG_INFO
374 printk(KERN_INFO "%s: New Peripheral Configuration Register: 0x%X\n",
376 #endif /* CY82C693_DEBUG_INFO */
378 #endif /* CY82C693_SETDMA_CLOCK */
382 static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
384 static ide_hwif_t *primary;
385 struct pci_dev *dev = to_pci_dev(hwif->dev);
387 if (PCI_FUNC(dev->devfn) == 1)
390 hwif->mate = primary;
395 static const struct ide_port_ops cy82c693_port_ops = {
396 .set_pio_mode = cy82c693_set_pio_mode,
397 .set_dma_mode = cy82c693_set_dma_mode,
400 static const struct ide_port_info cy82c693_chipset __devinitdata = {
402 .init_chipset = init_chipset_cy82c693,
403 .init_iops = init_iops_cy82c693,
404 .port_ops = &cy82c693_port_ops,
405 .chipset = ide_cy82c693,
406 .host_flags = IDE_HFLAG_SINGLE,
407 .pio_mask = ATA_PIO4,
408 .swdma_mask = ATA_SWDMA2,
409 .mwdma_mask = ATA_MWDMA2,
412 static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)
414 struct pci_dev *dev2;
417 /* CY82C693 is more than only a IDE controller.
418 Function 1 is primary IDE channel, function 2 - secondary. */
419 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
420 PCI_FUNC(dev->devfn) == 1) {
421 dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
422 ret = ide_setup_pci_devices(dev, dev2, &cy82c693_chipset);
423 /* We leak pci refs here but thats ok - we can't be unloaded */
428 static const struct pci_device_id cy82c693_pci_tbl[] = {
429 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
432 MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);
434 static struct pci_driver driver = {
435 .name = "Cypress_IDE",
436 .id_table = cy82c693_pci_tbl,
437 .probe = cy82c693_init_one,
440 static int __init cy82c693_ide_init(void)
442 return ide_pci_register_driver(&driver);
445 module_init(cy82c693_ide_init);
447 MODULE_AUTHOR("Andreas Krebs, Andre Hedrick");
448 MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
449 MODULE_LICENSE("GPL");