| /* |
| * 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> |
| |
| /* 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! 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_CTRLREG1 0x01 |
| #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) |
| { |
| int clk1, clk2; |
| int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock(); |
| |
| /* 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(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-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; |
| |
| #if CY82C693_DEBUG_LOGS |
| /* for debug let's show the previous values */ |
| |
| outb(index, CY82_INDEX_PORT); |
| data = inb(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 = (mode & 3) | (single << 2); |
| |
| outb(index, CY82_INDEX_PORT); |
| outb(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 & 3, 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; |
| outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT); |
| outb(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 */ |
| } |
| |
| static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| 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; |
| } |
| } |
| |
| #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 */ |
| |
| /* let's calc the values for this PIO mode */ |
| compute_clocks(pio, &pclk); |
| |
| /* 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 |
| */ |
| static unsigned int __devinit init_chipset_cy82c693(struct pci_dev *dev, const char *name) |
| { |
| if (PCI_FUNC(dev->devfn) != 1) |
| return 0; |
| |
| #ifdef CY82C693_SETDMA_CLOCK |
| u8 data = 0; |
| #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 */ |
| |
| outb(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT); |
| data = inb(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; |
| |
| outb(CY82_INDEX_CTRLREG1, CY82_INDEX_PORT); |
| outb(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; |
| } |
| |
| 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 = "CY82C693", |
| .init_chipset = init_chipset_cy82c693, |
| .init_iops = init_iops_cy82c693, |
| .port_ops = &cy82c693_port_ops, |
| .chipset = ide_cy82c693, |
| .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_setup_pci_devices(dev, dev2, &cy82c693_chipset); |
| /* We leak pci refs here but thats ok - we can't be unloaded */ |
| } |
| return ret; |
| } |
| |
| 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 driver = { |
| .name = "Cypress_IDE", |
| .id_table = cy82c693_pci_tbl, |
| .probe = cy82c693_init_one, |
| }; |
| |
| static int __init cy82c693_ide_init(void) |
| { |
| return ide_pci_register_driver(&driver); |
| } |
| |
| module_init(cy82c693_ide_init); |
| |
| MODULE_AUTHOR("Andreas Krebs, Andre Hedrick"); |
| MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE"); |
| MODULE_LICENSE("GPL"); |