/* * Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator * * CYPRESS CY82C693 chipset IDE controller * * The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards. * Writing the driver was quite simple, since most of the job is * done by the generic pci-ide support. * The hard part was finding the CY82C693's datasheet on Cypress's * web page :-(. But Altavista solved this problem :-). * * * Notes: * - I recently got a 16.8G IBM DTTA, so I was able to test it with * a large and fast disk - the results look great, so I'd say the * driver is working fine :-) * hdparm -t reports 8.17 MB/sec at about 6% CPU usage for the DTTA * - this is my first linux driver, so there's probably a lot of room * for optimizations and bug fixing, so feel free to do it. * - if using PIO mode it's a good idea to set the PIO mode and * 32-bit I/O support (if possible), e.g. hdparm -p2 -c1 /dev/hda * - I had some problems with my IBM DHEA with PIO modes < 2 * (lost interrupts) ????? * - first tests with DMA look okay, they seem to work, but there is a * problem with sound - the BusMaster IDE TimeOut should fixed this * * Ancient History: * AMH@1999-08-24: v0.34 init_cy82c693_chip moved to pci_init_cy82c693 * ASK@1999-01-23: v0.33 made a few minor code clean ups * removed DMA clock speed setting by default * added boot message * ASK@1998-11-01: v0.32 added support to set BusMaster IDE TimeOut * added support to set DMA Controller Clock Speed * ASK@1998-10-31: v0.31 fixed problem with setting to high DMA modes * on some drives. * ASK@1998-10-29: v0.3 added support to set DMA modes * ASK@1998-10-28: v0.2 added support to set PIO modes * ASK@1998-10-27: v0.1 first version - chipset detection * */ #include <linux/module.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/ide.h> #include <linux/init.h> #include <asm/io.h> #define DRV_NAME "cy82c693" /* * NOTE: the value for busmaster timeout is tricky and I got it by * trial and error! By using a to low value will cause DMA timeouts * and drop IDE performance, and by using a to high value will cause * audio playback to scatter. * If you know a better value or how to calc it, please let me know. */ /* twice the value written in cy82c693ub datasheet */ #define BUSMASTER_TIMEOUT 0x50 /* * the value above was tested on my machine and it seems to work okay */ /* here are the offset definitions for the registers */ #define CY82_IDE_CMDREG 0x04 #define CY82_IDE_ADDRSETUP 0x48 #define CY82_IDE_MASTER_IOR 0x4C #define CY82_IDE_MASTER_IOW 0x4D #define CY82_IDE_SLAVE_IOR 0x4E #define CY82_IDE_SLAVE_IOW 0x4F #define CY82_IDE_MASTER_8BIT 0x50 #define CY82_IDE_SLAVE_8BIT 0x51 #define CY82_INDEX_PORT 0x22 #define CY82_DATA_PORT 0x23 #define CY82_INDEX_CHANNEL0 0x30 #define CY82_INDEX_CHANNEL1 0x31 #define CY82_INDEX_TIMEOUT 0x32 /* the min and max PCI bus speed in MHz - from datasheet */ #define CY82C963_MIN_BUS_SPEED 25 #define CY82C963_MAX_BUS_SPEED 33 /* the struct for the PIO mode timings */ typedef struct pio_clocks_s { u8 address_time; /* Address setup (clocks) */ u8 time_16r; /* clocks for 16bit IOR (0xF0=Active/data, 0x0F=Recovery) */ u8 time_16w; /* clocks for 16bit IOW (0xF0=Active/data, 0x0F=Recovery) */ u8 time_8; /* clocks for 8bit (0xF0=Active/data, 0x0F=Recovery) */ } pio_clocks_t; /* * calc clocks using bus_speed * returns (rounded up) time in bus clocks for time in ns */ static int calc_clk(int time, int bus_speed) { int clocks; clocks = (time*bus_speed+999)/1000 - 1; if (clocks < 0) clocks = 0; if (clocks > 0x0F) clocks = 0x0F; return clocks; } /* * compute the values for the clock registers for PIO * mode and pci_clk [MHz] speed * * NOTE: for mode 0,1 and 2 drives 8-bit IDE command control registers are used * for mode 3 and 4 drives 8 and 16-bit timings are the same * */ static void compute_clocks(u8 pio, pio_clocks_t *p_pclk) { struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio); int clk1, clk2; int bus_speed = ide_pci_clk ? ide_pci_clk : 33; /* we don't check against CY82C693's min and max speed, * so you can play with the idebus=xx parameter */ /* let's calc the address setup time clocks */ p_pclk->address_time = (u8)calc_clk(t->setup, bus_speed); /* let's calc the active and recovery time clocks */ clk1 = calc_clk(t->active, bus_speed); /* calc recovery timing */ clk2 = t->cycle - t->active - t->setup; clk2 = calc_clk(clk2, bus_speed); clk1 = (clk1<<4)|clk2; /* combine active and recovery clocks */ /* note: we use the same values for 16bit IOR and IOW * those are all the same, since I don't have other * timings than those from ide-lib.c */ p_pclk->time_16r = (u8)clk1; p_pclk->time_16w = (u8)clk1; /* what are good values for 8bit ?? */ p_pclk->time_8 = (u8)clk1; } /* * set DMA mode a specific channel for CY82C693 */ static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode) { ide_hwif_t *hwif = drive->hwif; u8 single = (mode & 0x10) >> 4, index = 0, data = 0; index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0; data = (mode & 3) | (single << 2); outb(index, CY82_INDEX_PORT); outb(data, CY82_DATA_PORT); /* * note: below we set the value for Bus Master IDE TimeOut Register * I'm not absolutly sure what this does, but it solved my problem * with IDE DMA and sound, so I now can play sound and work with * my IDE driver at the same time :-) * * If you know the correct (best) value for this register please * let me know - ASK */ data = BUSMASTER_TIMEOUT; outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT); outb(data, CY82_DATA_PORT); } static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio) { ide_hwif_t *hwif = drive->hwif; struct pci_dev *dev = to_pci_dev(hwif->dev); pio_clocks_t pclk; unsigned int addrCtrl; /* select primary or secondary channel */ if (hwif->index > 0) { /* drive is on the secondary channel */ dev = pci_get_slot(dev->bus, dev->devfn+1); if (!dev) { printk(KERN_ERR "%s: tune_drive: " "Cannot find secondary interface!\n", drive->name); return; } } /* let's calc the values for this PIO mode */ compute_clocks(pio, &pclk); /* now let's write the clocks registers */ if ((drive->dn & 1) == 0) { /* * set master drive * address setup control register * is 32 bit !!! */ pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl); addrCtrl &= (~0xF); addrCtrl |= (unsigned int)pclk.address_time; pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl); /* now let's set the remaining registers */ pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, pclk.time_16r); pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, pclk.time_16w); pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, pclk.time_8); } else { /* * set slave drive * address setup control register * is 32 bit !!! */ pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl); addrCtrl &= (~0xF0); addrCtrl |= ((unsigned int)pclk.address_time<<4); pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl); /* now let's set the remaining registers */ pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, pclk.time_16r); pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, pclk.time_16w); pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, pclk.time_8); } } static void __devinit init_iops_cy82c693(ide_hwif_t *hwif) { static ide_hwif_t *primary; struct pci_dev *dev = to_pci_dev(hwif->dev); if (PCI_FUNC(dev->devfn) == 1) primary = hwif; else { hwif->mate = primary; hwif->channel = 1; } } static const struct ide_port_ops cy82c693_port_ops = { .set_pio_mode = cy82c693_set_pio_mode, .set_dma_mode = cy82c693_set_dma_mode, }; static const struct ide_port_info cy82c693_chipset __devinitdata = { .name = DRV_NAME, .init_iops = init_iops_cy82c693, .port_ops = &cy82c693_port_ops, .host_flags = IDE_HFLAG_SINGLE, .pio_mask = ATA_PIO4, .swdma_mask = ATA_SWDMA2, .mwdma_mask = ATA_MWDMA2, }; static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id) { struct pci_dev *dev2; int ret = -ENODEV; /* CY82C693 is more than only a IDE controller. Function 1 is primary IDE channel, function 2 - secondary. */ if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && PCI_FUNC(dev->devfn) == 1) { dev2 = pci_get_slot(dev->bus, dev->devfn + 1); ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL); if (ret) pci_dev_put(dev2); } return ret; } static void __devexit cy82c693_remove(struct pci_dev *dev) { struct ide_host *host = pci_get_drvdata(dev); struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL; ide_pci_remove(dev); pci_dev_put(dev2); } static const struct pci_device_id cy82c693_pci_tbl[] = { { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 }, { 0, }, }; MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl); static struct pci_driver cy82c693_pci_driver = { .name = "Cypress_IDE", .id_table = cy82c693_pci_tbl, .probe = cy82c693_init_one, .remove = __devexit_p(cy82c693_remove), .suspend = ide_pci_suspend, .resume = ide_pci_resume, }; static int __init cy82c693_ide_init(void) { return ide_pci_register_driver(&cy82c693_pci_driver); } static void __exit cy82c693_ide_exit(void) { pci_unregister_driver(&cy82c693_pci_driver); } module_init(cy82c693_ide_init); module_exit(cy82c693_ide_exit); MODULE_AUTHOR("Andreas Krebs, Andre Hedrick"); MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE"); MODULE_LICENSE("GPL");