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linux/drivers/ide/pci/cmd64x.c
Sergei Shtylyov e277a1aaa9 cmd64x: fix recovery time calculation (take 3) 
The driver wrongly takes the address setup time into account when calculating
the PIO recovery time -- this leads to slight overclocking of the PIO modes 0
and 1 (so, the prayers failed to help, as usual :-).  Rework the code to be
calculating recovery clock count as a difference between the total cycle count
and the active count (we don't need to calculate the recovery time itself since
it's not specified for the PIO modes 0 to 2, and for modes 3 and 4 this formula
gives enough recovery time anyway in the chip's supported PCI frequency range).

This patch has been inspired by reading the datasheets and looking at what the
libata driver does; it has been compile-tested only (as usual :-) but anyway,
the new code gives the same or longer recovery times than the old one...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-03-17 21:57:24 +01:00

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/* $Id: cmd64x.c,v 1.21 2000/01/30 23:23:16
*
* linux/drivers/ide/pci/cmd64x.c Version 1.42 Feb 8, 2007
*
* cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
* Note, this driver is not used at all on other systems because
* there the "BIOS" has done all of the following already.
* Due to massive hardware bugs, UltraDMA is only supported
* on the 646U2 and not on the 646U.
*
* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1998 David S. Miller (davem@redhat.com)
*
* Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
* Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/io.h>
#define DISPLAY_CMD64X_TIMINGS
#define CMD_DEBUG 0
#if CMD_DEBUG
#define cmdprintk(x...) printk(x)
#else
#define cmdprintk(x...)
#endif
/*
* CMD64x specific registers definition.
*/
#define CFR 0x50
#define CFR_INTR_CH0 0x02
#define CNTRL 0x51
#define CNTRL_DIS_RA0 0x40
#define CNTRL_DIS_RA1 0x80
#define CNTRL_ENA_2ND 0x08
#define CMDTIM 0x52
#define ARTTIM0 0x53
#define DRWTIM0 0x54
#define ARTTIM1 0x55
#define DRWTIM1 0x56
#define ARTTIM23 0x57
#define ARTTIM23_DIS_RA2 0x04
#define ARTTIM23_DIS_RA3 0x08
#define ARTTIM23_INTR_CH1 0x10
#define ARTTIM2 0x57
#define ARTTIM3 0x57
#define DRWTIM23 0x58
#define DRWTIM2 0x58
#define BRST 0x59
#define DRWTIM3 0x5b
#define BMIDECR0 0x70
#define MRDMODE 0x71
#define MRDMODE_INTR_CH0 0x04
#define MRDMODE_INTR_CH1 0x08
#define MRDMODE_BLK_CH0 0x10
#define MRDMODE_BLK_CH1 0x20
#define BMIDESR0 0x72
#define UDIDETCR0 0x73
#define DTPR0 0x74
#define BMIDECR1 0x78
#define BMIDECSR 0x79
#define BMIDESR1 0x7A
#define UDIDETCR1 0x7B
#define DTPR1 0x7C
#if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS)
#include <linux/stat.h>
#include <linux/proc_fs.h>
static u8 cmd64x_proc = 0;
#define CMD_MAX_DEVS 5
static struct pci_dev *cmd_devs[CMD_MAX_DEVS];
static int n_cmd_devs;
static char * print_cmd64x_get_info (char *buf, struct pci_dev *dev, int index)
{
char *p = buf;
u8 reg53 = 0, reg54 = 0, reg55 = 0, reg56 = 0; /* primary */
u8 reg57 = 0, reg58 = 0, reg5b; /* secondary */
u8 reg72 = 0, reg73 = 0; /* primary */
u8 reg7a = 0, reg7b = 0; /* secondary */
u8 reg50 = 0, reg71 = 0; /* extra */
p += sprintf(p, "\nController: %d\n", index);
p += sprintf(p, "CMD%x Chipset.\n", dev->device);
(void) pci_read_config_byte(dev, CFR, &reg50);
(void) pci_read_config_byte(dev, ARTTIM0, &reg53);
(void) pci_read_config_byte(dev, DRWTIM0, &reg54);
(void) pci_read_config_byte(dev, ARTTIM1, &reg55);
(void) pci_read_config_byte(dev, DRWTIM1, &reg56);
(void) pci_read_config_byte(dev, ARTTIM2, &reg57);
(void) pci_read_config_byte(dev, DRWTIM2, &reg58);
(void) pci_read_config_byte(dev, DRWTIM3, &reg5b);
(void) pci_read_config_byte(dev, MRDMODE, &reg71);
(void) pci_read_config_byte(dev, BMIDESR0, &reg72);
(void) pci_read_config_byte(dev, UDIDETCR0, &reg73);
(void) pci_read_config_byte(dev, BMIDESR1, &reg7a);
(void) pci_read_config_byte(dev, UDIDETCR1, &reg7b);
p += sprintf(p, "--------------- Primary Channel "
"---------------- Secondary Channel "
"-------------\n");
p += sprintf(p, " %sabled "
" %sabled\n",
(reg72&0x80)?"dis":" en",
(reg7a&0x80)?"dis":" en");
p += sprintf(p, "--------------- drive0 "
"--------- drive1 -------- drive0 "
"---------- drive1 ------\n");
p += sprintf(p, "DMA enabled: %s %s"
" %s %s\n",
(reg72&0x20)?"yes":"no ", (reg72&0x40)?"yes":"no ",
(reg7a&0x20)?"yes":"no ", (reg7a&0x40)?"yes":"no ");
p += sprintf(p, "DMA Mode: %s(%s) %s(%s)",
(reg72&0x20)?((reg73&0x01)?"UDMA":" DMA"):" PIO",
(reg72&0x20)?(
((reg73&0x30)==0x30)?(((reg73&0x35)==0x35)?"3":"0"):
((reg73&0x20)==0x20)?(((reg73&0x25)==0x25)?"3":"1"):
((reg73&0x10)==0x10)?(((reg73&0x15)==0x15)?"4":"2"):
((reg73&0x00)==0x00)?(((reg73&0x05)==0x05)?"5":"2"):
"X"):"?",
(reg72&0x40)?((reg73&0x02)?"UDMA":" DMA"):" PIO",
(reg72&0x40)?(
((reg73&0xC0)==0xC0)?(((reg73&0xC5)==0xC5)?"3":"0"):
((reg73&0x80)==0x80)?(((reg73&0x85)==0x85)?"3":"1"):
((reg73&0x40)==0x40)?(((reg73&0x4A)==0x4A)?"4":"2"):
((reg73&0x00)==0x00)?(((reg73&0x0A)==0x0A)?"5":"2"):
"X"):"?");
p += sprintf(p, " %s(%s) %s(%s)\n",
(reg7a&0x20)?((reg7b&0x01)?"UDMA":" DMA"):" PIO",
(reg7a&0x20)?(
((reg7b&0x30)==0x30)?(((reg7b&0x35)==0x35)?"3":"0"):
((reg7b&0x20)==0x20)?(((reg7b&0x25)==0x25)?"3":"1"):
((reg7b&0x10)==0x10)?(((reg7b&0x15)==0x15)?"4":"2"):
((reg7b&0x00)==0x00)?(((reg7b&0x05)==0x05)?"5":"2"):
"X"):"?",
(reg7a&0x40)?((reg7b&0x02)?"UDMA":" DMA"):" PIO",
(reg7a&0x40)?(
((reg7b&0xC0)==0xC0)?(((reg7b&0xC5)==0xC5)?"3":"0"):
((reg7b&0x80)==0x80)?(((reg7b&0x85)==0x85)?"3":"1"):
((reg7b&0x40)==0x40)?(((reg7b&0x4A)==0x4A)?"4":"2"):
((reg7b&0x00)==0x00)?(((reg7b&0x0A)==0x0A)?"5":"2"):
"X"):"?" );
p += sprintf(p, "PIO Mode: %s %s"
" %s %s\n",
"?", "?", "?", "?");
p += sprintf(p, " %s %s\n",
(reg50 & CFR_INTR_CH0) ? "interrupting" : "polling ",
(reg57 & ARTTIM23_INTR_CH1) ? "interrupting" : "polling");
p += sprintf(p, " %s %s\n",
(reg71 & MRDMODE_INTR_CH0) ? "pending" : "clear ",
(reg71 & MRDMODE_INTR_CH1) ? "pending" : "clear");
p += sprintf(p, " %s %s\n",
(reg71 & MRDMODE_BLK_CH0) ? "blocked" : "enabled",
(reg71 & MRDMODE_BLK_CH1) ? "blocked" : "enabled");
return (char *)p;
}
static int cmd64x_get_info (char *buffer, char **addr, off_t offset, int count)
{
char *p = buffer;
int i;
p += sprintf(p, "\n");
for (i = 0; i < n_cmd_devs; i++) {
struct pci_dev *dev = cmd_devs[i];
p = print_cmd64x_get_info(p, dev, i);
}
return p-buffer; /* => must be less than 4k! */
}
#endif /* defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS) */
static u8 quantize_timing(int timing, int quant)
{
return (timing + quant - 1) / quant;
}
/*
* This routine writes the prepared setup/active/recovery counts
* for a drive into the cmd646 chipset registers to active them.
*/
static void program_drive_counts (ide_drive_t *drive, int setup_count, int active_count, int recovery_count)
{
unsigned long flags;
struct pci_dev *dev = HWIF(drive)->pci_dev;
ide_drive_t *drives = HWIF(drive)->drives;
u8 temp_b;
static const u8 setup_counts[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
static const u8 recovery_counts[] =
{15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0};
static const u8 arttim_regs[2][2] = {
{ ARTTIM0, ARTTIM1 },
{ ARTTIM23, ARTTIM23 }
};
static const u8 drwtim_regs[2][2] = {
{ DRWTIM0, DRWTIM1 },
{ DRWTIM2, DRWTIM3 }
};
int channel = (int) HWIF(drive)->channel;
int slave = (drives != drive); /* Is this really the best way to determine this?? */
cmdprintk("program_drive_count parameters = s(%d),a(%d),r(%d),p(%d)\n",
setup_count, active_count, recovery_count, drive->present);
/*
* Set up address setup count registers.
* Primary interface has individual count/timing registers for
* each drive. Secondary interface has one common set of registers,
* for address setup so we merge these timings, using the slowest
* value.
*/
if (channel) {
drive->drive_data = setup_count;
setup_count = max(drives[0].drive_data,
drives[1].drive_data);
cmdprintk("Secondary interface, setup_count = %d\n",
setup_count);
}
/*
* Convert values to internal chipset representation
*/
setup_count = (setup_count > 5) ? 0xc0 : (int) setup_counts[setup_count];
active_count &= 0xf; /* Remember, max value is 16 */
recovery_count = (int) recovery_counts[recovery_count];
cmdprintk("Final values = %d,%d,%d\n",
setup_count, active_count, recovery_count);
/*
* Now that everything is ready, program the new timings
*/
local_irq_save(flags);
/*
* Program the address_setup clocks into ARTTIM reg,
* and then the active/recovery counts into the DRWTIM reg
*/
(void) pci_read_config_byte(dev, arttim_regs[channel][slave], &temp_b);
(void) pci_write_config_byte(dev, arttim_regs[channel][slave],
((u8) setup_count) | (temp_b & 0x3f));
(void) pci_write_config_byte(dev, drwtim_regs[channel][slave],
(u8) ((active_count << 4) | recovery_count));
cmdprintk ("Write %x to %x\n",
((u8) setup_count) | (temp_b & 0x3f),
arttim_regs[channel][slave]);
cmdprintk ("Write %x to %x\n",
(u8) ((active_count << 4) | recovery_count),
drwtim_regs[channel][slave]);
local_irq_restore(flags);
}
/*
* This routine selects drive's best PIO mode, calculates setup/active/recovery
* counts, and then writes them into the chipset registers.
*/
static u8 cmd64x_tune_pio (ide_drive_t *drive, u8 mode_wanted)
{
int setup_time, active_time, cycle_time;
u8 cycle_count, setup_count, active_count, recovery_count;
u8 pio_mode;
int clock_time = 1000 / system_bus_clock();
ide_pio_data_t pio;
pio_mode = ide_get_best_pio_mode(drive, mode_wanted, 5, &pio);
cycle_time = pio.cycle_time;
setup_time = ide_pio_timings[pio_mode].setup_time;
active_time = ide_pio_timings[pio_mode].active_time;
setup_count = quantize_timing( setup_time, clock_time);
cycle_count = quantize_timing( cycle_time, clock_time);
active_count = quantize_timing(active_time, clock_time);
recovery_count = cycle_count - active_count;
/* program_drive_counts() takes care of zero recovery cycles */
if (recovery_count > 16) {
active_count += recovery_count - 16;
recovery_count = 16;
}
if (active_count > 16)
active_count = 16; /* maximum allowed by cmd64x */
program_drive_counts (drive, setup_count, active_count, recovery_count);
cmdprintk("%s: PIO mode wanted %d, selected %d (%dns)%s, "
"clocks=%d/%d/%d\n",
drive->name, mode_wanted, pio_mode, cycle_time,
pio.overridden ? " (overriding vendor mode)" : "",
setup_count, active_count, recovery_count);
return pio_mode;
}
/*
* Attempts to set drive's PIO mode.
* Special cases are 8: prefetch off, 9: prefetch on (both never worked),
* and 255: auto-select best mode (used at boot time).
*/
static void cmd64x_tune_drive (ide_drive_t *drive, u8 pio)
{
/*
* Filter out the prefetch control values
* to prevent PIO5 from being programmed
*/
if (pio == 8 || pio == 9)
return;
pio = cmd64x_tune_pio(drive, pio);
(void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
}
static u8 cmd64x_ratemask (ide_drive_t *drive)
{
struct pci_dev *dev = HWIF(drive)->pci_dev;
u8 mode = 0;
switch(dev->device) {
case PCI_DEVICE_ID_CMD_649:
mode = 3;
break;
case PCI_DEVICE_ID_CMD_648:
mode = 2;
break;
case PCI_DEVICE_ID_CMD_643:
return 0;
case PCI_DEVICE_ID_CMD_646:
{
unsigned int class_rev = 0;
pci_read_config_dword(dev,
PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xff;
/*
* UltraDMA only supported on PCI646U and PCI646U2, which
* correspond to revisions 0x03, 0x05 and 0x07 respectively.
* Actually, although the CMD tech support people won't
* tell me the details, the 0x03 revision cannot support
* UDMA correctly without hardware modifications, and even
* then it only works with Quantum disks due to some
* hold time assumptions in the 646U part which are fixed
* in the 646U2.
*
* So we only do UltraDMA on revision 0x05 and 0x07 chipsets.
*/
switch(class_rev) {
case 0x07:
case 0x05:
return 1;
case 0x03:
case 0x01:
default:
return 0;
}
}
}
if (!eighty_ninty_three(drive))
mode = min(mode, (u8)1);
return mode;
}
static int cmd64x_tune_chipset (ide_drive_t *drive, u8 xferspeed)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
u8 unit = (drive->select.b.unit & 0x01);
u8 regU = 0, pciU = (hwif->channel) ? UDIDETCR1 : UDIDETCR0;
u8 regD = 0, pciD = (hwif->channel) ? BMIDESR1 : BMIDESR0;
u8 speed = ide_rate_filter(cmd64x_ratemask(drive), xferspeed);
if (speed >= XFER_SW_DMA_0) {
(void) pci_read_config_byte(dev, pciD, &regD);
(void) pci_read_config_byte(dev, pciU, &regU);
regD &= ~(unit ? 0x40 : 0x20);
regU &= ~(unit ? 0xCA : 0x35);
(void) pci_write_config_byte(dev, pciD, regD);
(void) pci_write_config_byte(dev, pciU, regU);
(void) pci_read_config_byte(dev, pciD, &regD);
(void) pci_read_config_byte(dev, pciU, &regU);
}
switch(speed) {
case XFER_UDMA_5: regU |= (unit ? 0x0A : 0x05); break;
case XFER_UDMA_4: regU |= (unit ? 0x4A : 0x15); break;
case XFER_UDMA_3: regU |= (unit ? 0x8A : 0x25); break;
case XFER_UDMA_2: regU |= (unit ? 0x42 : 0x11); break;
case XFER_UDMA_1: regU |= (unit ? 0x82 : 0x21); break;
case XFER_UDMA_0: regU |= (unit ? 0xC2 : 0x31); break;
case XFER_MW_DMA_2: regD |= (unit ? 0x40 : 0x10); break;
case XFER_MW_DMA_1: regD |= (unit ? 0x80 : 0x20); break;
case XFER_MW_DMA_0: regD |= (unit ? 0xC0 : 0x30); break;
case XFER_SW_DMA_2: regD |= (unit ? 0x40 : 0x10); break;
case XFER_SW_DMA_1: regD |= (unit ? 0x80 : 0x20); break;
case XFER_SW_DMA_0: regD |= (unit ? 0xC0 : 0x30); break;
case XFER_PIO_5:
case XFER_PIO_4:
case XFER_PIO_3:
case XFER_PIO_2:
case XFER_PIO_1:
case XFER_PIO_0:
(void) cmd64x_tune_pio(drive, speed - XFER_PIO_0);
break;
default:
return 1;
}
if (speed >= XFER_SW_DMA_0) {
(void) pci_write_config_byte(dev, pciU, regU);
regD |= (unit ? 0x40 : 0x20);
(void) pci_write_config_byte(dev, pciD, regD);
}
return (ide_config_drive_speed(drive, speed));
}
static int config_chipset_for_dma (ide_drive_t *drive)
{
u8 speed = ide_dma_speed(drive, cmd64x_ratemask(drive));
if (!speed)
return 0;
if (cmd64x_tune_chipset(drive, speed))
return 0;
return ide_dma_enable(drive);
}
static int cmd64x_config_drive_for_dma (ide_drive_t *drive)
{
if (ide_use_dma(drive) && config_chipset_for_dma(drive))
return 0;
if (ide_use_fast_pio(drive))
cmd64x_tune_drive(drive, 255);
return -1;
}
static int cmd64x_alt_dma_status (struct pci_dev *dev)
{
switch(dev->device) {
case PCI_DEVICE_ID_CMD_648:
case PCI_DEVICE_ID_CMD_649:
return 1;
default:
break;
}
return 0;
}
static int cmd64x_ide_dma_end (ide_drive_t *drive)
{
u8 dma_stat = 0, dma_cmd = 0;
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
drive->waiting_for_dma = 0;
/* read DMA command state */
dma_cmd = inb(hwif->dma_command);
/* stop DMA */
outb(dma_cmd & ~1, hwif->dma_command);
/* get DMA status */
dma_stat = inb(hwif->dma_status);
/* clear the INTR & ERROR bits */
outb(dma_stat | 6, hwif->dma_status);
if (cmd64x_alt_dma_status(dev)) {
u8 dma_intr = 0;
u8 dma_mask = (hwif->channel) ? ARTTIM23_INTR_CH1 :
CFR_INTR_CH0;
u8 dma_reg = (hwif->channel) ? ARTTIM2 : CFR;
(void) pci_read_config_byte(dev, dma_reg, &dma_intr);
/* clear the INTR bit */
(void) pci_write_config_byte(dev, dma_reg, dma_intr|dma_mask);
}
/* purge DMA mappings */
ide_destroy_dmatable(drive);
/* verify good DMA status */
return (dma_stat & 7) != 4;
}
static int cmd64x_ide_dma_test_irq (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
u8 dma_alt_stat = 0, mask = (hwif->channel) ? MRDMODE_INTR_CH1 :
MRDMODE_INTR_CH0;
u8 dma_stat = inb(hwif->dma_status);
(void) pci_read_config_byte(dev, MRDMODE, &dma_alt_stat);
#ifdef DEBUG
printk("%s: dma_stat: 0x%02x dma_alt_stat: "
"0x%02x mask: 0x%02x\n", drive->name,
dma_stat, dma_alt_stat, mask);
#endif
if (!(dma_alt_stat & mask))
return 0;
/* return 1 if INTR asserted */
if ((dma_stat & 4) == 4)
return 1;
return 0;
}
/*
* ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old
* event order for DMA transfers.
*/
static int cmd646_1_ide_dma_end (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat = 0, dma_cmd = 0;
drive->waiting_for_dma = 0;
/* get DMA status */
dma_stat = inb(hwif->dma_status);
/* read DMA command state */
dma_cmd = inb(hwif->dma_command);
/* stop DMA */
outb(dma_cmd & ~1, hwif->dma_command);
/* clear the INTR & ERROR bits */
outb(dma_stat | 6, hwif->dma_status);
/* and free any DMA resources */
ide_destroy_dmatable(drive);
/* verify good DMA status */
return (dma_stat & 7) != 4;
}
static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const char *name)
{
u32 class_rev = 0;
u8 mrdmode = 0;
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xff;
switch(dev->device) {
case PCI_DEVICE_ID_CMD_643:
break;
case PCI_DEVICE_ID_CMD_646:
printk(KERN_INFO "%s: chipset revision 0x%02X, ", name, class_rev);
switch(class_rev) {
case 0x07:
case 0x05:
printk("UltraDMA Capable");
break;
case 0x03:
printk("MultiWord DMA Force Limited");
break;
case 0x01:
default:
printk("MultiWord DMA Limited, IRQ workaround enabled");
break;
}
printk("\n");
break;
case PCI_DEVICE_ID_CMD_648:
case PCI_DEVICE_ID_CMD_649:
break;
default:
break;
}
/* Set a good latency timer and cache line size value. */
(void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
/* FIXME: pci_set_master() to ensure a good latency timer value */
/* Setup interrupts. */
(void) pci_read_config_byte(dev, MRDMODE, &mrdmode);
mrdmode &= ~(0x30);
(void) pci_write_config_byte(dev, MRDMODE, mrdmode);
/* Use MEMORY READ LINE for reads.
* NOTE: Although not mentioned in the PCI0646U specs,
* these bits are write only and won't be read
* back as set or not. The PCI0646U2 specs clarify
* this point.
*/
(void) pci_write_config_byte(dev, MRDMODE, mrdmode | 0x02);
/* Set reasonable active/recovery/address-setup values. */
(void) pci_write_config_byte(dev, ARTTIM0, 0x40);
(void) pci_write_config_byte(dev, DRWTIM0, 0x3f);
(void) pci_write_config_byte(dev, ARTTIM1, 0x40);
(void) pci_write_config_byte(dev, DRWTIM1, 0x3f);
#ifdef __i386__
(void) pci_write_config_byte(dev, ARTTIM23, 0x1c);
#else
(void) pci_write_config_byte(dev, ARTTIM23, 0x5c);
#endif
(void) pci_write_config_byte(dev, DRWTIM23, 0x3f);
(void) pci_write_config_byte(dev, DRWTIM3, 0x3f);
#ifdef CONFIG_PPC
(void) pci_write_config_byte(dev, UDIDETCR0, 0xf0);
#endif /* CONFIG_PPC */
#if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS)
cmd_devs[n_cmd_devs++] = dev;
if (!cmd64x_proc) {
cmd64x_proc = 1;
ide_pci_create_host_proc("cmd64x", cmd64x_get_info);
}
#endif /* DISPLAY_CMD64X_TIMINGS && CONFIG_PROC_FS */
return 0;
}
static unsigned int __devinit ata66_cmd64x(ide_hwif_t *hwif)
{
u8 ata66 = 0, mask = (hwif->channel) ? 0x02 : 0x01;
switch(hwif->pci_dev->device) {
case PCI_DEVICE_ID_CMD_643:
case PCI_DEVICE_ID_CMD_646:
return ata66;
default:
break;
}
pci_read_config_byte(hwif->pci_dev, BMIDECSR, &ata66);
return (ata66 & mask) ? 1 : 0;
}
static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
{
struct pci_dev *dev = hwif->pci_dev;
unsigned int class_rev;
hwif->autodma = 0;
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xff;
hwif->tuneproc = &cmd64x_tune_drive;
hwif->speedproc = &cmd64x_tune_chipset;
hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
if (!hwif->dma_base)
return;
hwif->atapi_dma = 1;
hwif->ultra_mask = 0x3f;
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
if (dev->device == PCI_DEVICE_ID_CMD_643)
hwif->ultra_mask = 0x80;
if (dev->device == PCI_DEVICE_ID_CMD_646)
hwif->ultra_mask = (class_rev > 0x04) ? 0x07 : 0x80;
if (dev->device == PCI_DEVICE_ID_CMD_648)
hwif->ultra_mask = 0x1f;
hwif->ide_dma_check = &cmd64x_config_drive_for_dma;
if (!(hwif->udma_four))
hwif->udma_four = ata66_cmd64x(hwif);
if (dev->device == PCI_DEVICE_ID_CMD_646) {
hwif->chipset = ide_cmd646;
if (class_rev == 0x01) {
hwif->ide_dma_end = &cmd646_1_ide_dma_end;
} else {
hwif->ide_dma_end = &cmd64x_ide_dma_end;
hwif->ide_dma_test_irq = &cmd64x_ide_dma_test_irq;
}
} else {
hwif->ide_dma_end = &cmd64x_ide_dma_end;
hwif->ide_dma_test_irq = &cmd64x_ide_dma_test_irq;
}
if (!noautodma)
hwif->autodma = 1;
hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
}
static ide_pci_device_t cmd64x_chipsets[] __devinitdata = {
{ /* 0 */
.name = "CMD643",
.init_chipset = init_chipset_cmd64x,
.init_hwif = init_hwif_cmd64x,
.channels = 2,
.autodma = AUTODMA,
.bootable = ON_BOARD,
},{ /* 1 */
.name = "CMD646",
.init_chipset = init_chipset_cmd64x,
.init_hwif = init_hwif_cmd64x,
.channels = 2,
.autodma = AUTODMA,
.enablebits = {{0x00,0x00,0x00}, {0x51,0x80,0x80}},
.bootable = ON_BOARD,
},{ /* 2 */
.name = "CMD648",
.init_chipset = init_chipset_cmd64x,
.init_hwif = init_hwif_cmd64x,
.channels = 2,
.autodma = AUTODMA,
.bootable = ON_BOARD,
},{ /* 3 */
.name = "CMD649",
.init_chipset = init_chipset_cmd64x,
.init_hwif = init_hwif_cmd64x,
.channels = 2,
.autodma = AUTODMA,
.bootable = ON_BOARD,
}
};
static int __devinit cmd64x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
return ide_setup_pci_device(dev, &cmd64x_chipsets[id->driver_data]);
}
static struct pci_device_id cmd64x_pci_tbl[] = {
{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_643, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_648, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
{ PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_649, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
{ 0, },
};
MODULE_DEVICE_TABLE(pci, cmd64x_pci_tbl);
static struct pci_driver driver = {
.name = "CMD64x_IDE",
.id_table = cmd64x_pci_tbl,
.probe = cmd64x_init_one,
};
static int __init cmd64x_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
module_init(cmd64x_ide_init);
MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick");
MODULE_DESCRIPTION("PCI driver module for CMD64x IDE");
MODULE_LICENSE("GPL");
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