/* * linux/drivers/ide/cy82c693.c Version 0.34 Dec. 13, 1999 * * Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer * Copyright (C) 1998-2000 Andre Hedrick , Integrater * * CYPRESS CY82C693 chipset IDE controller * * The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards. * Writting 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. * - use idebus=xx parameter to set PCI bus speed - needed to calc * timings for PIO modes (default will be 40) * - 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 * * * 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 drive * 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 #include #include #include #include #include #include #include "ide_modes.h" /* the current version */ #define CY82_VERSION "CY82C693U driver v0.34 99-13-12 Andreas S. Krebs (akrebs@altavista.net)" /* * The following are used to debug the driver. */ #define CY82C693_DEBUG_LOGS 0 #define CY82C693_DEBUG_INFO 0 /* define CY82C693_SETDMA_CLOCK to set DMA Controller Clock Speed to ATCLK */ #undef CY82C693_SETDMA_CLOCK /* * note: the value for busmaster timeout is tricky and i got it by trial and error ! * using a to low value will cause DMA timeouts and drop IDE performance * 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 */ #define BUSMASTER_TIMEOUT 0x50 /* twice the value written in cy82c693ub datasheet */ /* * 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_CTRLREG1 0x01 #define CY82_INDEX_CHANNEL0 0x30 #define CY82_INDEX_CHANNEL1 0x31 #define CY82_INDEX_TIMEOUT 0x32 /* the max PIO mode - from datasheet */ #define CY82C693_MAX_PIO 4 /* 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 { byte address_time; /* Address setup (clocks) */ byte time_16r; /* clocks for 16bit IOR (0xF0=Active/data, 0x0F=Recovery) */ byte time_16w; /* clocks for 16bit IOW (0xF0=Active/data, 0x0F=Recovery) */ byte 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 (byte pio, pio_clocks_t *p_pclk) { int clk1, clk2; int bus_speed = system_bus_clock(); /* get speed of PCI bus */ /* we don't check against CY82C693's min and max speed, * so you can play with the idebus=xx parameter */ if (pio > CY82C693_MAX_PIO) pio = CY82C693_MAX_PIO; /* let's calc the address setup time clocks */ p_pclk->address_time = (byte)calc_clk(ide_pio_timings[pio].setup_time, bus_speed); /* let's calc the active and recovery time clocks */ clk1 = calc_clk(ide_pio_timings[pio].active_time, bus_speed); /* calc recovery timing */ clk2 = ide_pio_timings[pio].cycle_time - ide_pio_timings[pio].active_time - ide_pio_timings[pio].setup_time; 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_modes.h */ p_pclk->time_16r = (byte)clk1; p_pclk->time_16w = (byte)clk1; /* what are good values for 8bit ?? */ p_pclk->time_8 = (byte)clk1; } #ifdef CONFIG_BLK_DEV_IDEDMA /* * set DMA mode a specific channel for CY82C693 */ static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single) { byte index; byte data; if (mode>2) /* make sure we set a valid mode */ mode = 2; if (mode > drive->id->tDMA) /* to be absolutly sure we have a valid mode */ mode = drive->id->tDMA; index = (HWIF(drive)->channel==0) ? CY82_INDEX_CHANNEL0 : CY82_INDEX_CHANNEL1; #if CY82C693_DEBUG_LOGS /* for debug let's show the previous values */ OUT_BYTE(index, CY82_INDEX_PORT); data = IN_BYTE(CY82_DATA_PORT); printk (KERN_INFO "%s (ch=%d, dev=%d): DMA mode is %d (single=%d)\n", drive->name, HWIF(drive)->channel, drive->select.b.unit, (data&0x3), ((data>>2)&1)); #endif /* CY82C693_DEBUG_LOGS */ data = (byte)mode|(byte)(single<<2); OUT_BYTE(index, CY82_INDEX_PORT); OUT_BYTE(data, CY82_DATA_PORT); #if CY82C693_DEBUG_INFO printk (KERN_INFO "%s (ch=%d, dev=%d): set DMA mode to %d (single=%d)\n", drive->name, HWIF(drive)->channel, drive->select.b.unit, mode, single); #endif /* CY82C693_DEBUG_INFO */ /* * 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; OUT_BYTE(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT); OUT_BYTE(data, CY82_DATA_PORT); #if CY82C693_DEBUG_INFO printk (KERN_INFO "%s: Set IDE Bus Master TimeOut Register to 0x%X\n", drive->name, data); #endif /* CY82C693_DEBUG_INFO */ } /* * used to set DMA mode for CY82C693 (single and multi modes) */ static int cy82c693_dmaproc(ide_dma_action_t func, ide_drive_t *drive) { /* * if the function is dma on, set dma mode for drive everything * else is done by the defaul func */ if (func == ide_dma_on) { struct hd_driveid *id = drive->id; #if CY82C693_DEBUG_INFO printk (KERN_INFO "dma_on: %s\n", drive->name); #endif /* CY82C693_DEBUG_INFO */ if (id != NULL) { /* Enable DMA on any drive that has DMA (multi or single) enabled */ if (id->field_valid & 2) { /* regular DMA */ int mmode, smode; mmode = id->dma_mword & (id->dma_mword >> 8); smode = id->dma_1word & (id->dma_1word >> 8); if (mmode != 0) cy82c693_dma_enable(drive, (mmode >> 1), 0); /* enable multi */ else if (smode != 0) cy82c693_dma_enable(drive, (smode >> 1), 1); /* enable single */ } } } return ide_dmaproc(func, drive); } #endif /* CONFIG_BLK_DEV_IDEDMA */ /* * tune ide drive - set PIO mode */ static void cy82c693_tune_drive (ide_drive_t *drive, byte pio) { ide_hwif_t *hwif = HWIF(drive); struct pci_dev *dev = hwif->pci_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_find_slot(dev->bus->number, dev->devfn+1); if (!dev) { printk(KERN_ERR "%s: tune_drive: Cannot find secondary interface!\n", drive->name); return; } } #if CY82C693_DEBUG_LOGS /* for debug let's show the register values */ if (drive->select.b.unit == 0) { /* * get master drive registers * address setup control register * is 32 bit !!! */ pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl); addrCtrl &= 0x0F; /* now let's get the remaining registers */ pci_read_config_byte(dev, CY82_IDE_MASTER_IOR, &pclk.time_16r); pci_read_config_byte(dev, CY82_IDE_MASTER_IOW, &pclk.time_16w); pci_read_config_byte(dev, CY82_IDE_MASTER_8BIT, &pclk.time_8); } else { /* * set slave drive registers * address setup control register * is 32 bit !!! */ pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl); addrCtrl &= 0xF0; addrCtrl >>= 4; /* now let's get the remaining registers */ pci_read_config_byte(dev, CY82_IDE_SLAVE_IOR, &pclk.time_16r); pci_read_config_byte(dev, CY82_IDE_SLAVE_IOW, &pclk.time_16w); pci_read_config_byte(dev, CY82_IDE_SLAVE_8BIT, &pclk.time_8); } printk (KERN_INFO "%s (ch=%d, dev=%d): PIO timing is (addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n", drive->name, hwif->channel, drive->select.b.unit, addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8); #endif /* CY82C693_DEBUG_LOGS */ /* first let's calc the pio modes */ pio = ide_get_best_pio_mode(drive, pio, CY82C693_MAX_PIO, NULL); #if CY82C693_DEBUG_INFO printk (KERN_INFO "%s: Selected PIO mode %d\n", drive->name, pio); #endif /* CY82C693_DEBUG_INFO */ compute_clocks(pio, &pclk); /* let's calc the values for this PIO mode */ /* now let's write the clocks registers */ if (drive->select.b.unit == 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); addrCtrl &= 0xF; } 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); addrCtrl >>= 4; addrCtrl &= 0xF; } #if CY82C693_DEBUG_INFO printk (KERN_INFO "%s (ch=%d, dev=%d): set PIO timing to (addr=0x%X, ior=0x%X, iow=0x%X, 8bit=0x%X)\n", drive->name, hwif->channel, drive->select.b.unit, addrCtrl, pclk.time_16r, pclk.time_16w, pclk.time_8); #endif /* CY82C693_DEBUG_INFO */ } /* * this function is called during init and is used to setup the cy82c693 chip */ /* * FIXME! "pci_init_cy82c693" really should replace * the "init_cy82c693_chip", it is the correct location to tinker/setup * the device prior to INIT. */ unsigned int __init pci_init_cy82c693(struct pci_dev *dev, const char *name) { #ifdef CY82C693_SETDMA_CLOCK byte data; #endif /* CY82C693_SETDMA_CLOCK */ /* write info about this verion of the driver */ printk (KERN_INFO CY82_VERSION "\n"); #ifdef CY82C693_SETDMA_CLOCK /* okay let's set the DMA clock speed */ OUT_BYTE(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT); data = IN_BYTE(CY82_DATA_PORT); #if CY82C693_DEBUG_INFO printk (KERN_INFO "%s: Peripheral Configuration Register: 0x%X\n", name, data); #endif /* CY82C693_DEBUG_INFO */ /* * for some reason sometimes the DMA controller * speed is set to ATCLK/2 ???? - we fix this here * * note: i don't know what causes this strange behaviour, * but even changing the dma speed doesn't solve it :-( * the ide performance is still only half the normal speed * * if anybody knows what goes wrong with my machine, please * let me know - ASK */ data |= 0x03; OUT_BYTE(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT); OUT_BYTE(data, CY82_DATA_PORT); #if CY82C693_DEBUG_INFO printk (KERN_INFO "%s: New Peripheral Configuration Register: 0x%X\n", name, data); #endif /* CY82C693_DEBUG_INFO */ #endif /* CY82C693_SETDMA_CLOCK */ return 0; } /* * the init function - called for each ide channel once */ void __init ide_init_cy82c693(ide_hwif_t *hwif) { hwif->chipset = ide_cy82c693; hwif->tuneproc = &cy82c693_tune_drive; hwif->drives[0].autotune = 1; hwif->drives[1].autotune = 1; hwif->autodma = 0; #ifdef CONFIG_BLK_DEV_IDEDMA if (hwif->dma_base) { hwif->dmaproc = &cy82c693_dmaproc; if (!noautodma) hwif->autodma = 1; } #endif /* CONFIG_BLK_DEV_IDEDMA */ }