linux/drivers/ide/pci/trm290.c
Jesper Juhl 59904159c3 [PATCH] Update CREDITS entry and listings in source files for Jesper Juhl
a) update entry in CREDITS for Jesper Juhl
b) remove email address from source files so it's only listed in credits.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27 16:26:20 -07:00

370 lines
11 KiB
C

/*
* linux/drivers/ide/pci/trm290.c Version 1.02 Mar. 18, 2000
*
* Copyright (c) 1997-1998 Mark Lord
* May be copied or modified under the terms of the GNU General Public License
*
* June 22, 2004 - get rid of check_region
* - Jesper Juhl
*
*/
/*
* This module provides support for the bus-master IDE DMA function
* of the Tekram TRM290 chip, used on a variety of PCI IDE add-on boards,
* including a "Precision Instruments" board. The TRM290 pre-dates
* the sff-8038 standard (ide-dma.c) by a few months, and differs
* significantly enough to warrant separate routines for some functions,
* while re-using others from ide-dma.c.
*
* EXPERIMENTAL! It works for me (a sample of one).
*
* Works reliably for me in DMA mode (READs only),
* DMA WRITEs are disabled by default (see #define below);
*
* DMA is not enabled automatically for this chipset,
* but can be turned on manually (with "hdparm -d1") at run time.
*
* I need volunteers with "spare" drives for further testing
* and development, and maybe to help figure out the peculiarities.
* Even knowing the registers (below), some things behave strangely.
*/
#define TRM290_NO_DMA_WRITES /* DMA writes seem unreliable sometimes */
/*
* TRM-290 PCI-IDE2 Bus Master Chip
* ================================
* The configuration registers are addressed in normal I/O port space
* and are used as follows:
*
* trm290_base depends on jumper settings, and is probed for by ide-dma.c
*
* trm290_base+2 when WRITTEN: chiptest register (byte, write-only)
* bit7 must always be written as "1"
* bits6-2 undefined
* bit1 1=legacy_compatible_mode, 0=native_pci_mode
* bit0 1=test_mode, 0=normal(default)
*
* trm290_base+2 when READ: status register (byte, read-only)
* bits7-2 undefined
* bit1 channel0 busmaster interrupt status 0=none, 1=asserted
* bit0 channel0 interrupt status 0=none, 1=asserted
*
* trm290_base+3 Interrupt mask register
* bits7-5 undefined
* bit4 legacy_header: 1=present, 0=absent
* bit3 channel1 busmaster interrupt status 0=none, 1=asserted (read only)
* bit2 channel1 interrupt status 0=none, 1=asserted (read only)
* bit1 channel1 interrupt mask: 1=masked, 0=unmasked(default)
* bit0 channel0 interrupt mask: 1=masked, 0=unmasked(default)
*
* trm290_base+1 "CPR" Config Pointer Register (byte)
* bit7 1=autoincrement CPR bits 2-0 after each access of CDR
* bit6 1=min. 1 wait-state posted write cycle (default), 0=0 wait-state
* bit5 0=enabled master burst access (default), 1=disable (write only)
* bit4 PCI DEVSEL# timing select: 1=medium(default), 0=fast
* bit3 0=primary IDE channel, 1=secondary IDE channel
* bits2-0 register index for accesses through CDR port
*
* trm290_base+0 "CDR" Config Data Register (word)
* two sets of seven config registers,
* selected by CPR bit 3 (channel) and CPR bits 2-0 (index 0 to 6),
* each index defined below:
*
* Index-0 Base address register for command block (word)
* defaults: 0x1f0 for primary, 0x170 for secondary
*
* Index-1 general config register (byte)
* bit7 1=DMA enable, 0=DMA disable
* bit6 1=activate IDE_RESET, 0=no action (default)
* bit5 1=enable IORDY, 0=disable IORDY (default)
* bit4 0=16-bit data port(default), 1=8-bit (XT) data port
* bit3 interrupt polarity: 1=active_low, 0=active_high(default)
* bit2 power-saving-mode(?): 1=enable, 0=disable(default) (write only)
* bit1 bus_master_mode(?): 1=enable, 0=disable(default)
* bit0 enable_io_ports: 1=enable(default), 0=disable
*
* Index-2 read-ahead counter preload bits 0-7 (byte, write only)
* bits7-0 bits7-0 of readahead count
*
* Index-3 read-ahead config register (byte, write only)
* bit7 1=enable_readahead, 0=disable_readahead(default)
* bit6 1=clear_FIFO, 0=no_action
* bit5 undefined
* bit4 mode4 timing control: 1=enable, 0=disable(default)
* bit3 undefined
* bit2 undefined
* bits1-0 bits9-8 of read-ahead count
*
* Index-4 base address register for control block (word)
* defaults: 0x3f6 for primary, 0x376 for secondary
*
* Index-5 data port timings (shared by both drives) (byte)
* standard PCI "clk" (clock) counts, default value = 0xf5
*
* bits7-6 setup time: 00=1clk, 01=2clk, 10=3clk, 11=4clk
* bits5-3 hold time: 000=1clk, 001=2clk, 010=3clk,
* 011=4clk, 100=5clk, 101=6clk,
* 110=8clk, 111=12clk
* bits2-0 active time: 000=2clk, 001=3clk, 010=4clk,
* 011=5clk, 100=6clk, 101=8clk,
* 110=12clk, 111=16clk
*
* Index-6 command/control port timings (shared by both drives) (byte)
* same layout as Index-5, default value = 0xde
*
* Suggested CDR programming for PIO mode0 (600ns):
* 0x01f0,0x21,0xff,0x80,0x03f6,0xf5,0xde ; primary
* 0x0170,0x21,0xff,0x80,0x0376,0xf5,0xde ; secondary
*
* Suggested CDR programming for PIO mode3 (180ns):
* 0x01f0,0x21,0xff,0x80,0x03f6,0x09,0xde ; primary
* 0x0170,0x21,0xff,0x80,0x0376,0x09,0xde ; secondary
*
* Suggested CDR programming for PIO mode4 (120ns):
* 0x01f0,0x21,0xff,0x80,0x03f6,0x00,0xde ; primary
* 0x0170,0x21,0xff,0x80,0x0376,0x00,0xde ; secondary
*
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/hdreg.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <asm/io.h>
static void trm290_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
{
ide_hwif_t *hwif = HWIF(drive);
u16 reg = 0;
unsigned long flags;
/* select PIO or DMA */
reg = use_dma ? (0x21 | 0x82) : (0x21 & ~0x82);
local_irq_save(flags);
if (reg != hwif->select_data) {
hwif->select_data = reg;
/* set PIO/DMA */
hwif->OUTB(0x51|(hwif->channel<<3), hwif->config_data+1);
hwif->OUTW(reg & 0xff, hwif->config_data);
}
/* enable IRQ if not probing */
if (drive->present) {
reg = hwif->INW(hwif->config_data + 3);
reg &= 0x13;
reg &= ~(1 << hwif->channel);
hwif->OUTW(reg, hwif->config_data+3);
}
local_irq_restore(flags);
}
static void trm290_selectproc (ide_drive_t *drive)
{
trm290_prepare_drive(drive, drive->using_dma);
}
#ifdef CONFIG_BLK_DEV_IDEDMA
static void trm290_ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
{
ide_hwif_t *hwif = HWIF(drive);
if (HWGROUP(drive)->handler != NULL) /* paranoia check */
BUG();
ide_set_handler(drive, &ide_dma_intr, WAIT_CMD, NULL);
/* issue cmd to drive */
hwif->OUTB(command, IDE_COMMAND_REG);
}
static int trm290_ide_dma_setup(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = hwif->hwgroup->rq;
unsigned int count, rw;
if (rq_data_dir(rq)) {
#ifdef TRM290_NO_DMA_WRITES
/* always use PIO for writes */
trm290_prepare_drive(drive, 0); /* select PIO xfer */
return 1;
#endif
rw = 1;
} else
rw = 2;
if (!(count = ide_build_dmatable(drive, rq))) {
/* try PIO instead of DMA */
trm290_prepare_drive(drive, 0); /* select PIO xfer */
return 1;
}
/* select DMA xfer */
trm290_prepare_drive(drive, 1);
hwif->OUTL(hwif->dmatable_dma|rw, hwif->dma_command);
drive->waiting_for_dma = 1;
/* start DMA */
hwif->OUTW((count * 2) - 1, hwif->dma_status);
return 0;
}
static void trm290_ide_dma_start(ide_drive_t *drive)
{
}
static int trm290_ide_dma_end (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u16 status = 0;
drive->waiting_for_dma = 0;
/* purge DMA mappings */
ide_destroy_dmatable(drive);
status = hwif->INW(hwif->dma_status);
return (status != 0x00ff);
}
static int trm290_ide_dma_test_irq (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u16 status = 0;
status = hwif->INW(hwif->dma_status);
return (status == 0x00ff);
}
#endif /* CONFIG_BLK_DEV_IDEDMA */
/*
* Invoked from ide-dma.c at boot time.
*/
static void __devinit init_hwif_trm290(ide_hwif_t *hwif)
{
unsigned int cfgbase = 0;
unsigned long flags;
u8 reg = 0;
struct pci_dev *dev = hwif->pci_dev;
hwif->no_lba48 = 1;
hwif->chipset = ide_trm290;
cfgbase = pci_resource_start(dev, 4);
if ((dev->class & 5) && cfgbase) {
hwif->config_data = cfgbase;
printk(KERN_INFO "TRM290: chip config base at 0x%04lx\n",
hwif->config_data);
} else {
hwif->config_data = 0x3df0;
printk(KERN_INFO "TRM290: using default config base at 0x%04lx\n",
hwif->config_data);
}
local_irq_save(flags);
/* put config reg into first byte of hwif->select_data */
hwif->OUTB(0x51|(hwif->channel<<3), hwif->config_data+1);
/* select PIO as default */
hwif->select_data = 0x21;
hwif->OUTB(hwif->select_data, hwif->config_data);
/* get IRQ info */
reg = hwif->INB(hwif->config_data+3);
/* mask IRQs for both ports */
reg = (reg & 0x10) | 0x03;
hwif->OUTB(reg, hwif->config_data+3);
local_irq_restore(flags);
if ((reg & 0x10))
/* legacy mode */
hwif->irq = hwif->channel ? 15 : 14;
else if (!hwif->irq && hwif->mate && hwif->mate->irq)
/* sharing IRQ with mate */
hwif->irq = hwif->mate->irq;
ide_setup_dma(hwif, (hwif->config_data + 4) ^ (hwif->channel ? 0x0080 : 0x0000), 3);
#ifdef CONFIG_BLK_DEV_IDEDMA
hwif->dma_setup = &trm290_ide_dma_setup;
hwif->dma_exec_cmd = &trm290_ide_dma_exec_cmd;
hwif->dma_start = &trm290_ide_dma_start;
hwif->ide_dma_end = &trm290_ide_dma_end;
hwif->ide_dma_test_irq = &trm290_ide_dma_test_irq;
#endif /* CONFIG_BLK_DEV_IDEDMA */
hwif->selectproc = &trm290_selectproc;
hwif->autodma = 0; /* play it safe for now */
hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
#if 1
{
/*
* My trm290-based card doesn't seem to work with all possible values
* for the control basereg, so this kludge ensures that we use only
* values that are known to work. Ugh. -ml
*/
u16 new, old, compat = hwif->channel ? 0x374 : 0x3f4;
static u16 next_offset = 0;
u8 old_mask;
hwif->OUTB(0x54|(hwif->channel<<3), hwif->config_data+1);
old = hwif->INW(hwif->config_data);
old &= ~1;
old_mask = hwif->INB(old+2);
if (old != compat && old_mask == 0xff) {
/* leave lower 10 bits untouched */
compat += (next_offset += 0x400);
hwif->io_ports[IDE_CONTROL_OFFSET] = compat + 2;
hwif->OUTW(compat|1, hwif->config_data);
new = hwif->INW(hwif->config_data);
printk(KERN_INFO "%s: control basereg workaround: "
"old=0x%04x, new=0x%04x\n",
hwif->name, old, new & ~1);
}
}
#endif
}
static ide_pci_device_t trm290_chipset __devinitdata = {
.name = "TRM290",
.init_hwif = init_hwif_trm290,
.channels = 2,
.autodma = NOAUTODMA,
.bootable = ON_BOARD,
};
static int __devinit trm290_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
return ide_setup_pci_device(dev, &trm290_chipset);
}
static struct pci_device_id trm290_pci_tbl[] = {
{ PCI_VENDOR_ID_TEKRAM, PCI_DEVICE_ID_TEKRAM_DC290, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ 0, },
};
MODULE_DEVICE_TABLE(pci, trm290_pci_tbl);
static struct pci_driver driver = {
.name = "TRM290_IDE",
.id_table = trm290_pci_tbl,
.probe = trm290_init_one,
};
static int trm290_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
module_init(trm290_ide_init);
MODULE_AUTHOR("Mark Lord");
MODULE_DESCRIPTION("PCI driver module for Tekram TRM290 IDE");
MODULE_LICENSE("GPL");