/*
* Libata driver for the highpoint 37x and 30x UDMA66 ATA controllers.
*
* This driver is heavily based upon:
*
* linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
*
* Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
* Portions Copyright (C) 2001 Sun Microsystems, Inc.
* Portions Copyright (C) 2003 Red Hat Inc
*
* TODO
* PLL mode
* Look into engine reset on timeout errors. Should not be
* required.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#define DRV_NAME "pata_hpt37x"
#define DRV_VERSION "0.5.2"
struct hpt_clock {
u8 xfer_speed;
u32 timing;
};
struct hpt_chip {
const char *name;
unsigned int base;
struct hpt_clock const *clocks[4];
};
/* key for bus clock timings
* bit
* 0:3 data_high_time. inactive time of DIOW_/DIOR_ for PIO and MW
* DMA. cycles = value + 1
* 4:8 data_low_time. active time of DIOW_/DIOR_ for PIO and MW
* DMA. cycles = value + 1
* 9:12 cmd_high_time. inactive time of DIOW_/DIOR_ during task file
* register access.
* 13:17 cmd_low_time. active time of DIOW_/DIOR_ during task file
* register access.
* 18:21 udma_cycle_time. clock freq and clock cycles for UDMA xfer.
* during task file register access.
* 22:24 pre_high_time. time to initialize 1st cycle for PIO and MW DMA
* xfer.
* 25:27 cmd_pre_high_time. time to initialize 1st PIO cycle for task
* register access.
* 28 UDMA enable
* 29 DMA enable
* 30 PIO_MST enable. if set, the chip is in bus master mode during
* PIO.
* 31 FIFO enable.
*/
/* from highpoint documentation. these are old values */
static const struct hpt_clock hpt370_timings_33[] = {
/* { XFER_UDMA_5, 0x1A85F442, 0x16454e31 }, */
{ XFER_UDMA_5, 0x16454e31 },
{ XFER_UDMA_4, 0x16454e31 },
{ XFER_UDMA_3, 0x166d4e31 },
{ XFER_UDMA_2, 0x16494e31 },
{ XFER_UDMA_1, 0x164d4e31 },
{ XFER_UDMA_0, 0x16514e31 },
{ XFER_MW_DMA_2, 0x26514e21 },
{ XFER_MW_DMA_1, 0x26514e33 },
{ XFER_MW_DMA_0, 0x26514e97 },
{ XFER_PIO_4, 0x06514e21 },
{ XFER_PIO_3, 0x06514e22 },
{ XFER_PIO_2, 0x06514e33 },
{ XFER_PIO_1, 0x06914e43 },
{ XFER_PIO_0, 0x06914e57 },
{ 0, 0x06514e57 }
};
static const struct hpt_clock hpt370_timings_66[] = {
{ XFER_UDMA_5, 0x14846231 },
{ XFER_UDMA_4, 0x14886231 },
{ XFER_UDMA_3, 0x148c6231 },
{ XFER_UDMA_2, 0x148c6231 },
{ XFER_UDMA_1, 0x14906231 },
{ XFER_UDMA_0, 0x14986231 },
{ XFER_MW_DMA_2, 0x26514e21 },
{ XFER_MW_DMA_1, 0x26514e33 },
{ XFER_MW_DMA_0, 0x26514e97 },
{ XFER_PIO_4, 0x06514e21 },
{ XFER_PIO_3, 0x06514e22 },
{ XFER_PIO_2, 0x06514e33 },
{ XFER_PIO_1, 0x06914e43 },
{ XFER_PIO_0, 0x06914e57 },
{ 0, 0x06514e57 }
};
/* these are the current (4 sep 2001) timings from highpoint */
static const struct hpt_clock hpt370a_timings_33[] = {
{ XFER_UDMA_5, 0x12446231 },
{ XFER_UDMA_4, 0x12446231