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kernel-ark/drivers/ata/pata_hpt3x2n.c
Tejun Heo 24dc5f33ea libata: update libata LLDs to use devres 
Update libata LLDs to use devres.  Core layer is already converted to
support managed LLDs.  This patch simplifies initialization and fixes
many resource related bugs in init failure and detach path.  For
example, all converted drivers now handle ata_device_add() failure
gracefully without excessive resource rollback code.

As most resources are released automatically on driver detach, many
drivers don't need or can do with much simpler ->{port|host}_stop().
In general, stop callbacks are need iff port or host needs to be given
commands to shut it down.  Note that freezing is enough in many cases
and ports are automatically frozen before being detached.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-09 17:39:37 -05:00

595 lines
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/*
* Libata driver for the highpoint 372N and 302N 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
* 371N
* Work out best PLL policy
*/
#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_hpt3x2n"
#define DRV_VERSION "0.3.2"
enum {
HPT_PCI_FAST = (1 << 31),
PCI66 = (1 << 1),
USE_DPLL = (1 << 0)
};
struct hpt_clock {
u8 xfer_speed;
u32 timing;
};
struct hpt_chip {
const char *name;
struct hpt_clock *clocks[3];
};
/* 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.
*/
/* 66MHz DPLL clocks */
static struct hpt_clock hpt3x2n_clocks[] = {
{ XFER_UDMA_7, 0x1c869c62 },
{ XFER_UDMA_6, 0x1c869c62 },
{ XFER_UDMA_5, 0x1c8a9c62 },
{ XFER_UDMA_4, 0x1c8a9c62 },
{ XFER_UDMA_3, 0x1c8e9c62 },
{ XFER_UDMA_2, 0x1c929c62 },
{ XFER_UDMA_1, 0x1c9a9c62 },
{ XFER_UDMA_0, 0x1c829c62 },
{ XFER_MW_DMA_2, 0x2c829c62 },
{ XFER_MW_DMA_1, 0x2c829c66 },
{ XFER_MW_DMA_0, 0x2c829d2c },
{ XFER_PIO_4, 0x0c829c62 },
{ XFER_PIO_3, 0x0c829c84 },
{ XFER_PIO_2, 0x0c829ca6 },
{ XFER_PIO_1, 0x0d029d26 },
{ XFER_PIO_0, 0x0d029d5e },
{ 0, 0x0d029d5e }
};
/**
* hpt3x2n_find_mode - reset the hpt3x2n bus
* @ap: ATA port
* @speed: transfer mode
*
* Return the 32bit register programming information for this channel
* that matches the speed provided. For the moment the clocks table
* is hard coded but easy to change. This will be needed if we use
* different DPLLs
*/
static u32 hpt3x2n_find_mode(struct ata_port *ap, int speed)
{
struct hpt_clock *clocks = hpt3x2n_clocks;
while(clocks->xfer_speed) {
if (clocks->xfer_speed == speed)
return clocks->timing;
clocks++;
}
BUG();
return 0xffffffffU; /* silence compiler warning */
}
/**
* hpt3x2n_pre_reset - reset the hpt3x2n bus
* @ap: ATA port to reset
*
* Perform the initial reset handling for the 3x2n series controllers.
* Reset the hardware and state machine, obtain the cable type.
*/
static int hpt3xn_pre_reset(struct ata_port *ap)
{
u8 scr2, ata66;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
pci_read_config_byte(pdev, 0x5B, &scr2);
pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
/* Cable register now active */
pci_read_config_byte(pdev, 0x5A, &ata66);
/* Restore state */
pci_write_config_byte(pdev, 0x5B, scr2);
if (ata66 & (1 << ap->port_no))
ap->cbl = ATA_CBL_PATA40;
else
ap->cbl = ATA_CBL_PATA80;
/* Reset the state machine */
pci_write_config_byte(pdev, 0x50, 0x37);
pci_write_config_byte(pdev, 0x54, 0x37);
udelay(100);
return ata_std_prereset(ap);
}
/**
* hpt3x2n_error_handler - probe the hpt3x2n bus
* @ap: ATA port to reset
*
* Perform the probe reset handling for the 3x2N
*/
static void hpt3x2n_error_handler(struct ata_port *ap)
{
ata_bmdma_drive_eh(ap, hpt3xn_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
}
/**
* hpt3x2n_set_piomode - PIO setup
* @ap: ATA interface
* @adev: device on the interface
*
* Perform PIO mode setup.
*/
static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u32 addr1, addr2;
u32 reg;
u32 mode;
u8 fast;
addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
addr2 = 0x51 + 4 * ap->port_no;
/* Fast interrupt prediction disable, hold off interrupt disable */
pci_read_config_byte(pdev, addr2, &fast);
fast &= ~0x07;
pci_write_config_byte(pdev, addr2, fast);
pci_read_config_dword(pdev, addr1, &reg);
mode = hpt3x2n_find_mode(ap, adev->pio_mode);
mode &= ~0x8000000; /* No FIFO in PIO */
mode &= ~0x30070000; /* Leave config bits alone */
reg &= 0x30070000; /* Strip timing bits */
pci_write_config_dword(pdev, addr1, reg | mode);
}
/**
* hpt3x2n_set_dmamode - DMA timing setup
* @ap: ATA interface
* @adev: Device being configured
*
* Set up the channel for MWDMA or UDMA modes. Much the same as with
* PIO, load the mode number and then set MWDMA or UDMA flag.
*/
static void hpt3x2n_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u32 addr1, addr2;
u32 reg;
u32 mode;
u8 fast;
addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
addr2 = 0x51 + 4 * ap->port_no;
/* Fast interrupt prediction disable, hold off interrupt disable */
pci_read_config_byte(pdev, addr2, &fast);
fast &= ~0x07;
pci_write_config_byte(pdev, addr2, fast);
pci_read_config_dword(pdev, addr1, &reg);
mode = hpt3x2n_find_mode(ap, adev->dma_mode);
mode |= 0x8000000; /* FIFO in MWDMA or UDMA */
mode &= ~0xC0000000; /* Leave config bits alone */
reg &= 0xC0000000; /* Strip timing bits */
pci_write_config_dword(pdev, addr1, reg | mode);
}
/**
* hpt3x2n_bmdma_end - DMA engine stop
* @qc: ATA command
*
* Clean up after the HPT3x2n and later DMA engine
*/
static void hpt3x2n_bmdma_stop(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int mscreg = 0x50 + 2 * ap->port_no;
u8 bwsr_stat, msc_stat;
pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
pci_read_config_byte(pdev, mscreg, &msc_stat);
if (bwsr_stat & (1 << ap->port_no))
pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
ata_bmdma_stop(qc);
}
/**
* hpt3x2n_set_clock - clock control
* @ap: ATA port
* @source: 0x21 or 0x23 for PLL or PCI sourced clock
*
* Switch the ATA bus clock between the PLL and PCI clock sources
* while correctly isolating the bus and resetting internal logic
*
* We must use the DPLL for
* - writing
* - second channel UDMA7 (SATA ports) or higher
* - 66MHz PCI
*
* or we will underclock the device and get reduced performance.
*/
static void hpt3x2n_set_clock(struct ata_port *ap, int source)
{
unsigned long bmdma = ap->ioaddr.bmdma_addr;
/* Tristate the bus */
outb(0x80, bmdma+0x73);
outb(0x80, bmdma+0x77);
/* Switch clock and reset channels */
outb(source, bmdma+0x7B);
outb(0xC0, bmdma+0x79);
/* Reset state machines */
outb(0x37, bmdma+0x70);
outb(0x37, bmdma+0x74);
/* Complete reset */
outb(0x00, bmdma+0x79);
/* Reconnect channels to bus */
outb(0x00, bmdma+0x73);
outb(0x00, bmdma+0x77);
}
/* Check if our partner interface is busy */
static int hpt3x2n_pair_idle(struct ata_port *ap)
{
struct ata_host *host = ap->host;
struct ata_port *pair = host->ports[ap->port_no ^ 1];
if (pair->hsm_task_state == HSM_ST_IDLE)
return 1;
return 0;
}
static int hpt3x2n_use_dpll(struct ata_port *ap, int writing)
{
long flags = (long)ap->host->private_data;
/* See if we should use the DPLL */
if (writing)
return USE_DPLL; /* Needed for write */
if (flags & PCI66)
return USE_DPLL; /* Needed at 66Mhz */
return 0;
}
static unsigned int hpt3x2n_qc_issue_prot(struct ata_queued_cmd *qc)
{
struct ata_taskfile *tf = &qc->tf;
struct ata_port *ap = qc->ap;
int flags = (long)ap->host->private_data;
if (hpt3x2n_pair_idle(ap)) {
int dpll = hpt3x2n_use_dpll(ap, (tf->flags & ATA_TFLAG_WRITE));
if ((flags & USE_DPLL) != dpll) {
if (dpll == 1)
hpt3x2n_set_clock(ap, 0x21);
else
hpt3x2n_set_clock(ap, 0x23);
}
}
return ata_qc_issue_prot(qc);
}
static struct scsi_host_template hpt3x2n_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = LIBATA_MAX_PRD,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = ATA_SHT_USE_CLUSTERING,
.proc_name = DRV_NAME,
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
};
/*
* Configuration for HPT3x2n.
*/
static struct ata_port_operations hpt3x2n_port_ops = {
.port_disable = ata_port_disable,
.set_piomode = hpt3x2n_set_piomode,
.set_dmamode = hpt3x2n_set_dmamode,
.mode_filter = ata_pci_default_filter,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = hpt3x2n_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
.bmdma_stop = hpt3x2n_bmdma_stop,
.bmdma_status = ata_bmdma_status,
.qc_prep = ata_qc_prep,
.qc_issue = hpt3x2n_qc_issue_prot,
.data_xfer = ata_pio_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.port_start = ata_port_start,
};
/**
* hpt3xn_calibrate_dpll - Calibrate the DPLL loop
* @dev: PCI device
*
* Perform a calibration cycle on the HPT3xN DPLL. Returns 1 if this
* succeeds
*/
static int hpt3xn_calibrate_dpll(struct pci_dev *dev)
{
u8 reg5b;
u32 reg5c;
int tries;
for(tries = 0; tries < 0x5000; tries++) {
udelay(50);
pci_read_config_byte(dev, 0x5b, &reg5b);
if (reg5b & 0x80) {
/* See if it stays set */
for(tries = 0; tries < 0x1000; tries ++) {
pci_read_config_byte(dev, 0x5b, &reg5b);
/* Failed ? */
if ((reg5b & 0x80) == 0)
return 0;
}
/* Turn off tuning, we have the DPLL set */
pci_read_config_dword(dev, 0x5c, &reg5c);
pci_write_config_dword(dev, 0x5c, reg5c & ~ 0x100);
return 1;
}
}
/* Never went stable */
return 0;
}
static int hpt3x2n_pci_clock(struct pci_dev *pdev)
{
unsigned long freq;
u32 fcnt;
pci_read_config_dword(pdev, 0x70/*CHECKME*/, &fcnt);
if ((fcnt >> 12) != 0xABCDE) {
printk(KERN_WARNING "hpt3xn: BIOS clock data not set.\n");
return 33; /* Not BIOS set */
}
fcnt &= 0x1FF;
freq = (fcnt * 77) / 192;
/* Clamp to bands */
if (freq < 40)
return 33;
if (freq < 45)
return 40;
if (freq < 55)
return 50;
return 66;
}
/**
* hpt3x2n_init_one - Initialise an HPT37X/302
* @dev: PCI device
* @id: Entry in match table
*
* Initialise an HPT3x2n device. There are some interesting complications
* here. Firstly the chip may report 366 and be one of several variants.
* Secondly all the timings depend on the clock for the chip which we must
* detect and look up
*
* This is the known chip mappings. It may be missing a couple of later
* releases.
*
* Chip version PCI Rev Notes
* HPT372 4 (HPT366) 5 Other driver
* HPT372N 4 (HPT366) 6 UDMA133
* HPT372 5 (HPT372) 1 Other driver
* HPT372N 5 (HPT372) 2 UDMA133
* HPT302 6 (HPT302) * Other driver
* HPT302N 6 (HPT302) > 1 UDMA133
* HPT371 7 (HPT371) * Other driver
* HPT371N 7 (HPT371) > 1 UDMA133
* HPT374 8 (HPT374) * Other driver
* HPT372N 9 (HPT372N) * UDMA133
*
* (1) UDMA133 support depends on the bus clock
*
* To pin down HPT371N
*/
static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
/* HPT372N and friends - UDMA133 */
static struct ata_port_info info = {
.sht = &hpt3x2n_sht,
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = 0x7f,
.port_ops = &hpt3x2n_port_ops
};
struct ata_port_info *port_info[2];
struct ata_port_info *port = &info;
u8 irqmask;
u32 class_rev;
unsigned int pci_mhz;
unsigned int f_low, f_high;
int adjust;
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xFF;
switch(dev->device) {
case PCI_DEVICE_ID_TTI_HPT366:
if (class_rev < 6)
return -ENODEV;
break;
case PCI_DEVICE_ID_TTI_HPT372:
/* 372N if rev >= 1*/
if (class_rev == 0)
return -ENODEV;
break;
case PCI_DEVICE_ID_TTI_HPT302:
if (class_rev < 2)
return -ENODEV;
break;
case PCI_DEVICE_ID_TTI_HPT372N:
break;
default:
printk(KERN_ERR "pata_hpt3x2n: PCI table is bogus please report (%d).\n", dev->device);
return -ENODEV;
}
/* Ok so this is a chip we support */
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
pci_read_config_byte(dev, 0x5A, &irqmask);
irqmask &= ~0x10;
pci_write_config_byte(dev, 0x5a, irqmask);
/* Tune the PLL. HPT recommend using 75 for SATA, 66 for UDMA133 or
50 for UDMA100. Right now we always use 66 */
pci_mhz = hpt3x2n_pci_clock(dev);
f_low = (pci_mhz * 48) / 66; /* PCI Mhz for 66Mhz DPLL */
f_high = f_low + 2; /* Tolerance */
pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
/* PLL clock */
pci_write_config_byte(dev, 0x5B, 0x21);
/* Unlike the 37x we don't try jiggling the frequency */
for(adjust = 0; adjust < 8; adjust++) {
if (hpt3xn_calibrate_dpll(dev))
break;
pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
}
if (adjust == 8)
printk(KERN_WARNING "hpt3xn: DPLL did not stabilize.\n");
/* Set our private data up. We only need a few flags so we use
it directly */
port->private_data = NULL;
if (pci_mhz > 60)
port->private_data = (void *)PCI66;
/* Now kick off ATA set up */
port_info[0] = port_info[1] = port;
return ata_pci_init_one(dev, port_info, 2);
}
static const struct pci_device_id hpt3x2n[] = {
{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372N), },
{ },
};
static struct pci_driver hpt3x2n_pci_driver = {
.name = DRV_NAME,
.id_table = hpt3x2n,
.probe = hpt3x2n_init_one,
.remove = ata_pci_remove_one
};
static int __init hpt3x2n_init(void)
{
return pci_register_driver(&hpt3x2n_pci_driver);
}
static void __exit hpt3x2n_exit(void)
{
pci_unregister_driver(&hpt3x2n_pci_driver);
}
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for the Highpoint HPT3x2n/30x");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, hpt3x2n);
MODULE_VERSION(DRV_VERSION);
module_init(hpt3x2n_init);
module_exit(hpt3x2n_exit);
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