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path: root/drivers/ide/pci/cy82c693.c
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Diffstat (limited to 'drivers/ide/pci/cy82c693.c')
-rw-r--r--drivers/ide/pci/cy82c693.c531
1 files changed, 531 insertions, 0 deletions
diff --git a/drivers/ide/pci/cy82c693.c b/drivers/ide/pci/cy82c693.c
new file mode 100644
index 00000000000..80d67e99ccb
--- /dev/null
+++ b/drivers/ide/pci/cy82c693.c
@@ -0,0 +1,531 @@
+/*
+ * linux/drivers/ide/pci/cy82c693.c Version 0.40 Sep. 10, 2002
+ *
+ * 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.
+ * - 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
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.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 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 {
+ 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 = 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 = (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_dma_enable (ide_drive_t *drive, int mode, int single)
+{
+ u8 index = 0, data = 0;
+
+ 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 */
+
+ HWIF(drive)->OUTB(index, CY82_INDEX_PORT);
+ data = HWIF(drive)->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 = (u8)mode|(u8)(single<<2);
+
+ HWIF(drive)->OUTB(index, CY82_INDEX_PORT);
+ HWIF(drive)->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, 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;
+ HWIF(drive)->OUTB(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
+ HWIF(drive)->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 */
+}
+
+/*
+ * used to set DMA mode for CY82C693 (single and multi modes)
+ */
+static int cy82c693_ide_dma_on (ide_drive_t *drive)
+{
+ 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) {
+ /* enable multi */
+ cy82c693_dma_enable(drive, (mmode >> 1), 0);
+ } else if (smode != 0) {
+ /* enable single */
+ cy82c693_dma_enable(drive, (smode >> 1), 1);
+ }
+ }
+ }
+ return __ide_dma_on(drive);
+}
+
+/*
+ * tune ide drive - set PIO mode
+ */
+static void cy82c693_tune_drive (ide_drive_t *drive, u8 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 */
+
+ /* 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 __init 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;
+}
+
+/*
+ * the init function - called for each ide channel once
+ */
+static void __init init_hwif_cy82c693(ide_hwif_t *hwif)
+{
+ hwif->autodma = 0;
+
+ hwif->chipset = ide_cy82c693;
+ hwif->tuneproc = &cy82c693_tune_drive;
+
+ if (!hwif->dma_base) {
+ hwif->drives[0].autotune = 1;
+ hwif->drives[1].autotune = 1;
+ return;
+ }
+
+ hwif->atapi_dma = 1;
+ hwif->mwdma_mask = 0x04;
+ hwif->swdma_mask = 0x04;
+
+ hwif->ide_dma_on = &cy82c693_ide_dma_on;
+ if (!noautodma)
+ hwif->autodma = 1;
+ hwif->drives[0].autodma = hwif->autodma;
+ hwif->drives[1].autodma = hwif->autodma;
+}
+
+static __initdata ide_hwif_t *primary;
+
+void __init init_iops_cy82c693(ide_hwif_t *hwif)
+{
+ if (PCI_FUNC(hwif->pci_dev->devfn) == 1)
+ primary = hwif;
+ else {
+ hwif->mate = primary;
+ hwif->channel = 1;
+ }
+}
+
+static ide_pci_device_t cy82c693_chipsets[] __devinitdata = {
+ { /* 0 */
+ .name = "CY82C693",
+ .init_chipset = init_chipset_cy82c693,
+ .init_iops = init_iops_cy82c693,
+ .init_hwif = init_hwif_cy82c693,
+ .channels = 1,
+ .autodma = AUTODMA,
+ .bootable = ON_BOARD,
+ }
+};
+
+static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ ide_pci_device_t *d = &cy82c693_chipsets[id->driver_data];
+ 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_find_slot(dev->bus->number, dev->devfn + 1);
+ ret = ide_setup_pci_devices(dev, dev2, d);
+ }
+ return ret;
+}
+
+static struct pci_device_id cy82c693_pci_tbl[] = {
+ { PCI_VENDOR_ID_CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 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 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");
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