// SPDX-License-Identifier: GPL-2.0-or-later
/*
* pata - legacy . c - Legacy port PATA / SATA controller driver .
* Copyright 2005 / 2006 Red Hat , all rights reserved .
*
* An ATA driver for the legacy ATA ports .
*
* Data Sources :
* Opti 82 C465 / 82 C611 support : Data sheets at opti - inc . com
* HT6560 series :
* Promise 20230 / 20620 :
* http : //www.ryston.cz/petr/vlb/pdc20230b.html
* http : //www.ryston.cz/petr/vlb/pdc20230c.html
* http : //www.ryston.cz/petr/vlb/pdc20630.html
* QDI65x0 :
* http : //www.ryston.cz/petr/vlb/qd6500.html
* http : //www.ryston.cz/petr/vlb/qd6580.html
*
* QDI65x0 probe code based on drivers / ide / legacy / qd65xx . c
* Rewritten from the work of Colten Edwards < pje120 @ cs . usask . ca > by
* Samuel Thibault < samuel . thibault @ ens - lyon . org >
*
* Unsupported but docs exist :
* Appian / Adaptec AIC25VL01 / Cirrus Logic PD7220
*
* This driver handles legacy ( that is " ISA / VLB side " ) IDE ports found
* on PC class systems . There are three hybrid devices that are exceptions
* The Cyrix 5510 / 5520 where a pre SFF ATA device is on the bridge and
* the MPIIX where the tuning is PCI side but the IDE is " ISA side " .
*
* Specific support is included for the ht6560a / ht6560b / opti82c611a /
* opti82c465mv / promise 20230 c / 20630 / qdi65x0 / winbond83759A
*
* Support for the Winbond 83759 A when operating in advanced mode .
* Multichip mode is not currently supported .
*
* Use the autospeed and pio_mask options with :
* Appian ADI / 2 aka CLPD7220 or AIC25VL01 .
* Use the jumpers , autospeed and set pio_mask to the mode on the jumpers with
* Goldstar GM82C711 , PIC - 1288 A - 125 , UMC 82 C871F , Winbond W83759 ,
* Winbond W83759A , Promise PDC20230 - B
*
* For now use autospeed and pio_mask as above with the W83759A . This may
* change .
*/
#include <linux/async.h>
#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/ata.h>
#include <linux/libata.h>
#include <linux/platform_device.h>
#define DRV_NAME "pata_legacy"
#define DRV_VERSION "0.6.5"
#define NR_HOST 6
static int all;
module_param(all, int , 0444 );
MODULE_PARM_DESC(all,
"Set to probe unclaimed pri/sec ISA port ranges even if PCI" );
static int probe_all;
module_param(probe_all, int , 0 );
MODULE_PARM_DESC(probe_all,
"Set to probe tertiary+ ISA port ranges even if PCI" );
static int probe_mask = ~0 ;
module_param(probe_mask, int , 0 );
MODULE_PARM_DESC(probe_mask, "Probe mask for legacy ISA PATA ports" );
static int autospeed;
module_param(autospeed, int , 0 );
MODULE_PARM_DESC(autospeed, "Chip present that snoops speed changes" );
static int pio_mask = ATA_PIO4;
module_param(pio_mask, int , 0 );
MODULE_PARM_DESC(pio_mask, "PIO range for autospeed devices" );
static int iordy_mask = 0 xFFFFFFFF;
module_param(iordy_mask, int , 0 );
MODULE_PARM_DESC(iordy_mask, "Use IORDY if available" );
static int ht6560a;
module_param(ht6560a, int , 0 );
MODULE_PARM_DESC(ht6560a, "HT 6560A on primary 1, second 2, both 3" );
static int ht6560b;
module_param(ht6560b, int , 0 );
MODULE_PARM_DESC(ht6560b, "HT 6560B on primary 1, secondary 2, both 3" );
static int opti82c611a;
module_param(opti82c611a, int , 0 );
MODULE_PARM_DESC(opti82c611a,
"Opti 82c611A on primary 1, secondary 2, both 3" );
static int opti82c46x;
module_param(opti82c46x, int , 0 );
MODULE_PARM_DESC(opti82c46x,
"Opti 82c465MV on primary 1, secondary 2, both 3" );
#ifdef CONFIG_PATA_QDI_MODULE
static int qdi = 1 ;
#else
static int qdi;
#endif
module_param(qdi, int , 0 );
MODULE_PARM_DESC(qdi, "Set to probe QDI controllers" );
#ifdef CONFIG_PATA_WINBOND_VLB_MODULE
static int winbond = 1 ;
#else
static int winbond;
#endif
module_param(winbond, int , 0 );
MODULE_PARM_DESC(winbond,
"Set to probe Winbond controllers, "
"give I/O port if non standard" );
enum controller {
BIOS = 0 ,
SNOOP = 1 ,
PDC20230 = 2 ,
HT6560A = 3 ,
HT6560B = 4 ,
OPTI611A = 5 ,
OPTI46X = 6 ,
QDI6500 = 7 ,
QDI6580 = 8 ,
QDI6580DP = 9 , /* Dual channel mode is different */
W83759A = 10 ,
UNKNOWN = -1
};
struct legacy_data {
unsigned long timing;
u8 clock[2 ];
u8 last;
int fast;
enum controller type;
struct platform_device *platform_dev;
};
struct legacy_probe {
unsigned char *name;
unsigned long port;
unsigned int irq;
unsigned int slot;
enum controller type;
unsigned long private ;
};
struct legacy_controller {
const char *name;
struct ata_port_operations *ops;
unsigned int pio_mask;
unsigned int flags;
unsigned int pflags;
int (*setup)(struct platform_device *, struct legacy_probe *probe,
struct legacy_data *data);
};
static int legacy_port[NR_HOST] = { 0 x1f0, 0 x170, 0 x1e8, 0 x168, 0 x1e0, 0 x160 };
static struct legacy_probe probe_list[NR_HOST];
static struct legacy_data legacy_data[NR_HOST];
static struct ata_host *legacy_host[NR_HOST];
/**
* legacy_probe_add - Add interface to probe list
* @ port : Controller port
* @ irq : IRQ number
* @ type : Controller type
* @ private : Controller specific info
*
* Add an entry into the probe list for ATA controllers . This is used
* to add the default ISA slots and then to build up the table
* further according to other ISA / VLB / Weird device scans
*
* An I / O port list is used to keep ordering stable and sane , as we
* don ' t have any good way to talk about ordering otherwise
*/
static int legacy_probe_add(unsigned long port, unsigned int irq,
enum controller type, unsigned long private )
{
struct legacy_probe *lp = &probe_list[0 ];
int i;
struct legacy_probe *free = NULL;
for (i = 0 ; i < NR_HOST; i++) {
if (lp->port == 0 && free == NULL)
free = lp;
/* Matching port, or the correct slot for ordering */
if (lp->port == port || legacy_port[i] == port) {
if (!(probe_mask & 1 << i))
return -1 ;
free = lp;
break ;
}
lp++;
}
if (free == NULL) {
printk(KERN_ERR "pata_legacy: Too many interfaces.\n" );
return -1 ;
}
/* Fill in the entry for later probing */
free->port = port;
free->irq = irq;
free->type = type;
free->private = private ;
return 0 ;
}
/**
* legacy_set_mode - mode setting
* @ link : IDE link
* @ unused : Device that failed when error is returned
*
* Use a non standard set_mode function . We don ' t want to be tuned .
*
* The BIOS configured everything . Our job is not to fiddle . Just use
* whatever PIO the hardware is using and leave it at that . When we
* get some kind of nice user driven API for control then we can
* expand on this as per hdparm in the base kernel .
*/
static int legacy_set_mode(struct ata_link *link, struct ata_device **unused)
{
struct ata_device *dev;
ata_for_each_dev(dev, link, ENABLED) {
ata_dev_info(dev, "configured for PIO\n" );
dev->pio_mode = XFER_PIO_0;
dev->xfer_mode = XFER_PIO_0;
dev->xfer_shift = ATA_SHIFT_PIO;
dev->flags |= ATA_DFLAG_PIO;
}
return 0 ;
}
static const struct scsi_host_template legacy_sht = {
ATA_PIO_SHT(DRV_NAME),
};
static const struct ata_port_operations legacy_base_port_ops = {
.inherits = &ata_sff_port_ops,
.cable_detect = ata_cable_40wire,
};
/*
* These ops are used if the user indicates the hardware
* snoops the commands to decide on the mode and handles the
* mode selection " magically " itself . Several legacy controllers
* do this . The mode range can be set if it is not 0 x1F by setting
* pio_mask as well .
*/
static struct ata_port_operations simple_port_ops = {
.inherits = &legacy_base_port_ops,
.sff_data_xfer = ata_sff_data_xfer32,
};
static struct ata_port_operations legacy_port_ops = {
.inherits = &legacy_base_port_ops,
.sff_data_xfer = ata_sff_data_xfer32,
.set_mode = legacy_set_mode,
};
/*
* Promise 20230 C and 20620 support
*
* This controller supports PIO0 to PIO2 . We set PIO timings
* conservatively to allow for 50 MHz Vesa Local Bus . The 20620 DMA
* support is weird being DMA to controller and PIO ' d to the host
* and not supported .
*/
static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
int tries = 5 ;
int pio = adev->pio_mode - XFER_PIO_0;
u8 rt;
unsigned long flags;
/* Safe as UP only. Force I/Os to occur together */
local_irq_save(flags);
/* Unlock the control interface */
do {
inb(0 x1F5);
outb(inb(0 x1F2) | 0 x80, 0 x1F2);
inb(0 x1F2);
inb(0 x3F6);
inb(0 x3F6);
inb(0 x1F2);
inb(0 x1F2);
}
while ((inb(0 x1F2) & 0 x80) && --tries);
local_irq_restore(flags);
outb(inb(0 x1F4) & 0 x07, 0 x1F4);
rt = inb(0 x1F3);
rt &= ~(0 x07 << (3 * !adev->devno));
if (pio)
rt |= (1 + 3 * pio) << (3 * !adev->devno);
outb(rt, 0 x1F3);
udelay(100 );
outb(inb(0 x1F2) | 0 x01, 0 x1F2);
udelay(100 );
inb(0 x1F5);
}
static unsigned int pdc_data_xfer_vlb(struct ata_queued_cmd *qc,
unsigned char *buf, unsigned int buflen, int rw)
{
struct ata_device *dev = qc->dev;
struct ata_port *ap = dev->link->ap;
int slop = buflen & 3 ;
/* 32bit I/O capable *and* we need to write a whole number of dwords */
if (ata_id_has_dword_io(dev->id) && (slop == 0 || slop == 3 )
&& (ap->pflags & ATA_PFLAG_PIO32)) {
unsigned long flags;
local_irq_save(flags);
/* Perform the 32bit I/O synchronization sequence */
ioread8(ap->ioaddr.nsect_addr);
ioread8(ap->ioaddr.nsect_addr);
ioread8(ap->ioaddr.nsect_addr);
/* Now the data */
if (rw == READ)
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2 );
else
iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2 );
if (unlikely(slop)) {
__le32 pad = 0 ;
if (rw == READ) {
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
} else {
memcpy(&pad, buf + buflen - slop, slop);
iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
}
buflen += 4 - slop;
}
local_irq_restore(flags);
} else
buflen = ata_sff_data_xfer32(qc, buf, buflen, rw);
return buflen;
}
static struct ata_port_operations pdc20230_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = pdc20230_set_piomode,
.sff_data_xfer = pdc_data_xfer_vlb,
};
/*
* Holtek 6560 A support
*
* This controller supports PIO0 to PIO2 ( no IORDY even though higher
* timings can be loaded ) .
*/
static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
u8 active, recover;
struct ata_timing t;
/* Get the timing data in cycles. For now play safe at 50Mhz */
ata_timing_compute(adev, adev->pio_mode, &t, 20000 , 1000 );
active = clamp_val(t.active, 2 , 15 );
recover = clamp_val(t.recover, 4 , 15 );
inb(0 x3E6);
inb(0 x3E6);
inb(0 x3E6);
inb(0 x3E6);
iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
ioread8(ap->ioaddr.status_addr);
}
static struct ata_port_operations ht6560a_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = ht6560a_set_piomode,
};
/*
* Holtek 6560 B support
*
* This controller supports PIO0 to PIO4 . We honour the BIOS / jumper FIFO
* setting unless we see an ATAPI device in which case we force it off .
*
* FIXME : need to implement 2 nd channel support .
*/
static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
u8 active, recover;
struct ata_timing t;
/* Get the timing data in cycles. For now play safe at 50Mhz */
ata_timing_compute(adev, adev->pio_mode, &t, 20000 , 1000 );
active = clamp_val(t.active, 2 , 15 );
recover = clamp_val(t.recover, 2 , 16 ) & 0 x0F;
inb(0 x3E6);
inb(0 x3E6);
inb(0 x3E6);
inb(0 x3E6);
iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
if (adev->class != ATA_DEV_ATA) {
u8 rconf = inb(0 x3E6);
if (rconf & 0 x24) {
rconf &= ~0 x24;
outb(rconf, 0 x3E6);
}
}
ioread8(ap->ioaddr.status_addr);
}
static struct ata_port_operations ht6560b_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = ht6560b_set_piomode,
};
/*
* Opti core chipset helpers
*/
/**
* opti_syscfg - read OPTI chipset configuration
* @ reg : Configuration register to read
*
* Returns the value of an OPTI system board configuration register .
*/
static u8 opti_syscfg(u8 reg)
{
unsigned long flags;
u8 r;
/* Uniprocessor chipset and must force cycles adjancent */
local_irq_save(flags);
outb(reg, 0 x22);
r = inb(0 x24);
local_irq_restore(flags);
return r;
}
/*
* Opti 82 C611A
*
* This controller supports PIO0 to PIO3 .
*/
static void opti82c611a_set_piomode(struct ata_port *ap,
struct ata_device *adev)
{
u8 active, recover, setup;
struct ata_timing t;
struct ata_device *pair = ata_dev_pair(adev);
int clock;
int khz[4 ] = { 50000 , 40000 , 33000 , 25000 };
u8 rc;
/* Enter configuration mode */
ioread16(ap->ioaddr.error_addr);
ioread16(ap->ioaddr.error_addr);
iowrite8(3 , ap->ioaddr.nsect_addr);
/* Read VLB clock strapping */
clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0 x03];
/* Get the timing data in cycles */
ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000 );
/* Setup timing is shared */
if (pair) {
struct ata_timing tp;
ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000 );
ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
}
active = clamp_val(t.active, 2 , 17 ) - 2 ;
recover = clamp_val(t.recover, 1 , 16 ) - 1 ;
setup = clamp_val(t.setup, 1 , 4 ) - 1 ;
/* Select the right timing bank for write timing */
rc = ioread8(ap->ioaddr.lbal_addr);
rc &= 0 x7F;
rc |= (adev->devno << 7 );
iowrite8(rc, ap->ioaddr.lbal_addr);
/* Write the timings */
iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
/* Select the right bank for read timings, also
load the shared timings for address */
rc = ioread8(ap->ioaddr.device_addr);
rc &= 0 xC0;
rc |= adev->devno; /* Index select */
rc |= (setup << 4 ) | 0 x04;
iowrite8(rc, ap->ioaddr.device_addr);
/* Load the read timings */
iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
/* Ensure the timing register mode is right */
rc = ioread8(ap->ioaddr.lbal_addr);
rc &= 0 x73;
rc |= 0 x84;
iowrite8(rc, ap->ioaddr.lbal_addr);
/* Exit command mode */
iowrite8(0 x83, ap->ioaddr.nsect_addr);
}
static struct ata_port_operations opti82c611a_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = opti82c611a_set_piomode,
};
/*
* Opti 82 C465MV
*
* This controller supports PIO0 to PIO3 . Unlike the 611 A the MVB
* version is dual channel but doesn ' t have a lot of unique registers .
*/
static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
u8 active, recover, setup;
struct ata_timing t;
struct ata_device *pair = ata_dev_pair(adev);
int clock;
int khz[4 ] = { 50000 , 40000 , 33000 , 25000 };
u8 rc;
u8 sysclk;
/* Get the clock */
sysclk = (opti_syscfg(0 xAC) & 0 xC0) >> 6 ; /* BIOS set */
/* Enter configuration mode */
ioread16(ap->ioaddr.error_addr);
ioread16(ap->ioaddr.error_addr);
iowrite8(3 , ap->ioaddr.nsect_addr);
/* Read VLB clock strapping */
clock = 1000000000 / khz[sysclk];
/* Get the timing data in cycles */
ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000 );
/* Setup timing is shared */
if (pair) {
struct ata_timing tp;
ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000 );
ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
}
active = clamp_val(t.active, 2 , 17 ) - 2 ;
recover = clamp_val(t.recover, 1 , 16 ) - 1 ;
setup = clamp_val(t.setup, 1 , 4 ) - 1 ;
/* Select the right timing bank for write timing */
rc = ioread8(ap->ioaddr.lbal_addr);
rc &= 0 x7F;
rc |= (adev->devno << 7 );
iowrite8(rc, ap->ioaddr.lbal_addr);
/* Write the timings */
iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
/* Select the right bank for read timings, also
load the shared timings for address */
rc = ioread8(ap->ioaddr.device_addr);
rc &= 0 xC0;
rc |= adev->devno; /* Index select */
rc |= (setup << 4 ) | 0 x04;
iowrite8(rc, ap->ioaddr.device_addr);
/* Load the read timings */
iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
/* Ensure the timing register mode is right */
rc = ioread8(ap->ioaddr.lbal_addr);
rc &= 0 x73;
rc |= 0 x84;
iowrite8(rc, ap->ioaddr.lbal_addr);
/* Exit command mode */
iowrite8(0 x83, ap->ioaddr.nsect_addr);
/* We need to know this for quad device on the MVB */
ap->host->private_data = ap;
}
/**
* opti82c46x_qc_issue - command issue
* @ qc : command pending
*
* Called when the libata layer is about to issue a command . We wrap
* this interface so that we can load the correct ATA timings . The
* MVB has a single set of timing registers and these are shared
* across channels . As there are two registers we really ought to
* track the last two used values as a sort of register window . For
* now we just reload on a channel switch . On the single channel
* setup this condition never fires so we do nothing extra .
*
* FIXME : dual channel needs - > serialize support
*/
static unsigned int opti82c46x_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct ata_device *adev = qc->dev;
/* If timings are set and for the wrong channel (2nd test is
due to a libata shortcoming and will eventually go I hope) */
if (ap->host->private_data != ap->host
&& ap->host->private_data != NULL)
opti82c46x_set_piomode(ap, adev);
return ata_sff_qc_issue(qc);
}
static struct ata_port_operations opti82c46x_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = opti82c46x_set_piomode,
.qc_issue = opti82c46x_qc_issue,
};
/**
* qdi65x0_set_piomode - PIO setup for QDI65x0
* @ ap : Port
* @ adev : Device
*
* In single channel mode the 6580 has one clock per device and we can
* avoid the requirement to clock switch . We also have to load the timing
* into the right clock according to whether we are master or slave .
*
* In dual channel mode the 6580 has one clock per channel and we have
* to software clockswitch in qc_issue .
*/
static void qdi65x0_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct ata_timing t;
struct legacy_data *ld_qdi = ap->host->private_data;
int active, recovery;
u8 timing;
/* Get the timing data in cycles */
ata_timing_compute(adev, adev->pio_mode, &t, 30303 , 1000 );
if (ld_qdi->fast) {
active = 8 - clamp_val(t.active, 1 , 8 );
recovery = 18 - clamp_val(t.recover, 3 , 18 );
} else {
active = 9 - clamp_val(t.active, 2 , 9 );
recovery = 15 - clamp_val(t.recover, 0 , 15 );
}
timing = (recovery << 4 ) | active | 0 x08;
ld_qdi->clock[adev->devno] = timing;
if (ld_qdi->type == QDI6580)
outb(timing, ld_qdi->timing + 2 * adev->devno);
else
outb(timing, ld_qdi->timing + 2 * ap->port_no);
/* Clear the FIFO */
if (ld_qdi->type != QDI6500 && adev->class != ATA_DEV_ATA)
outb(0 x5F, (ld_qdi->timing & 0 xFFF0) + 3 );
}
/**
* qdi_qc_issue - command issue
* @ qc : command pending
*
* Called when the libata layer is about to issue a command . We wrap
* this interface so that we can load the correct ATA timings .
*/
static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct ata_device *adev = qc->dev;
struct legacy_data *ld_qdi = ap->host->private_data;
if (ld_qdi->clock[adev->devno] != ld_qdi->last) {
if (adev->pio_mode) {
ld_qdi->last = ld_qdi->clock[adev->devno];
outb(ld_qdi->clock[adev->devno], ld_qdi->timing +
2 * ap->port_no);
}
}
return ata_sff_qc_issue(qc);
}
static unsigned int vlb32_data_xfer(struct ata_queued_cmd *qc,
unsigned char *buf,
unsigned int buflen, int rw)
{
struct ata_device *adev = qc->dev;
struct ata_port *ap = adev->link->ap;
int slop = buflen & 3 ;
if (ata_id_has_dword_io(adev->id) && (slop == 0 || slop == 3 )
&& (ap->pflags & ATA_PFLAG_PIO32)) {
if (rw == WRITE)
iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2 );
else
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2 );
if (unlikely(slop)) {
__le32 pad = 0 ;
if (rw == WRITE) {
memcpy(&pad, buf + buflen - slop, slop);
iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
} else {
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
}
}
return (buflen + 3 ) & ~3 ;
} else
return ata_sff_data_xfer(qc, buf, buflen, rw);
}
static int qdi_port(struct platform_device *dev,
struct legacy_probe *lp, struct legacy_data *ld)
{
if (devm_request_region(&dev->dev, lp->private , 4 , "qdi" ) == NULL)
return -EBUSY;
ld->timing = lp->private ;
return 0 ;
}
static struct ata_port_operations qdi6500_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = qdi65x0_set_piomode,
.qc_issue = qdi_qc_issue,
.sff_data_xfer = vlb32_data_xfer,
};
static struct ata_port_operations qdi6580_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = qdi65x0_set_piomode,
.sff_data_xfer = vlb32_data_xfer,
};
static struct ata_port_operations qdi6580dp_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = qdi65x0_set_piomode,
.qc_issue = qdi_qc_issue,
.sff_data_xfer = vlb32_data_xfer,
};
static DEFINE_SPINLOCK(winbond_lock);
static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
{
unsigned long flags;
spin_lock_irqsave(&winbond_lock, flags);
outb(reg, port + 0 x01);
outb(val, port + 0 x02);
spin_unlock_irqrestore(&winbond_lock, flags);
}
static u8 winbond_readcfg(unsigned long port, u8 reg)
{
u8 val;
unsigned long flags;
spin_lock_irqsave(&winbond_lock, flags);
outb(reg, port + 0 x01);
val = inb(port + 0 x02);
spin_unlock_irqrestore(&winbond_lock, flags);
return val;
}
static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct ata_timing t;
struct legacy_data *ld_winbond = ap->host->private_data;
int active, recovery;
u8 reg;
int timing = 0 x88 + (ap->port_no * 4 ) + (adev->devno * 2 );
reg = winbond_readcfg(ld_winbond->timing, 0 x81);
/* Get the timing data in cycles */
if (reg & 0 x40) /* Fast VLB bus, assume 50MHz */
ata_timing_compute(adev, adev->pio_mode, &t, 20000 , 1000 );
else
ata_timing_compute(adev, adev->pio_mode, &t, 30303 , 1000 );
active = (clamp_val(t.active, 3 , 17 ) - 1 ) & 0 x0F;
recovery = (clamp_val(t.recover, 1 , 15 ) + 1 ) & 0 x0F;
timing = (active << 4 ) | recovery;
winbond_writecfg(ld_winbond->timing, timing, reg);
/* Load the setup timing */
reg = 0 x35;
if (adev->class != ATA_DEV_ATA)
reg |= 0 x08; /* FIFO off */
if (!ata_pio_need_iordy(adev))
reg |= 0 x02; /* IORDY off */
reg |= (clamp_val(t.setup, 0 , 3 ) << 6 );
winbond_writecfg(ld_winbond->timing, timing + 1 , reg);
}
static int winbond_port(struct platform_device *dev,
struct legacy_probe *lp, struct legacy_data *ld)
{
if (devm_request_region(&dev->dev, lp->private , 4 , "winbond" ) == NULL)
return -EBUSY;
ld->timing = lp->private ;
return 0 ;
}
static struct ata_port_operations winbond_port_ops = {
.inherits = &legacy_base_port_ops,
.set_piomode = winbond_set_piomode,
.sff_data_xfer = vlb32_data_xfer,
};
static struct legacy_controller controllers[] = {
{"BIOS" , &legacy_port_ops, ATA_PIO4,
ATA_FLAG_NO_IORDY, 0 , NULL },
{"Snooping" , &simple_port_ops, ATA_PIO4,
0 , 0 , NULL },
{"PDC20230" , &pdc20230_port_ops, ATA_PIO2,
ATA_FLAG_NO_IORDY,
ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, NULL },
{"HT6560A" , &ht6560a_port_ops, ATA_PIO2,
ATA_FLAG_NO_IORDY, 0 , NULL },
{"HT6560B" , &ht6560b_port_ops, ATA_PIO4,
ATA_FLAG_NO_IORDY, 0 , NULL },
{"OPTI82C611A" , &opti82c611a_port_ops, ATA_PIO3,
0 , 0 , NULL },
{"OPTI82C46X" , &opti82c46x_port_ops, ATA_PIO3,
0 , 0 , NULL },
{"QDI6500" , &qdi6500_port_ops, ATA_PIO2,
ATA_FLAG_NO_IORDY,
ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port },
{"QDI6580" , &qdi6580_port_ops, ATA_PIO4,
0 , ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port },
{"QDI6580DP" , &qdi6580dp_port_ops, ATA_PIO4,
0 , ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port },
{"W83759A" , &winbond_port_ops, ATA_PIO4,
0 , ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE,
winbond_port }
};
/**
* probe_chip_type - Discover controller
* @ probe : Probe entry to check
*
* Probe an ATA port and identify the type of controller . We don ' t
* check if the controller appears to be driveless at this point .
*/
static __init int probe_chip_type(struct legacy_probe *probe)
{
int mask = 1 << probe->slot;
if (winbond && (probe->port == 0 x1F0 || probe->port == 0 x170)) {
u8 reg = winbond_readcfg(winbond, 0 x81);
reg |= 0 x80; /* jumpered mode off */
winbond_writecfg(winbond, 0 x81, reg);
reg = winbond_readcfg(winbond, 0 x83);
reg |= 0 xF0; /* local control */
winbond_writecfg(winbond, 0 x83, reg);
reg = winbond_readcfg(winbond, 0 x85);
reg |= 0 xF0; /* programmable timing */
winbond_writecfg(winbond, 0 x85, reg);
reg = winbond_readcfg(winbond, 0 x81);
if (reg & mask)
return W83759A;
}
if (probe->port == 0 x1F0) {
unsigned long flags;
local_irq_save(flags);
/* Probes */
outb(inb(0 x1F2) | 0 x80, 0 x1F2);
inb(0 x1F5);
inb(0 x1F2);
inb(0 x3F6);
inb(0 x3F6);
inb(0 x1F2);
inb(0 x1F2);
if ((inb(0 x1F2) & 0 x80) == 0 ) {
/* PDC20230c or 20630 ? */
printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller"
" detected.\n" );
udelay(100 );
inb(0 x1F5);
local_irq_restore(flags);
return PDC20230;
} else {
outb(0 x55, 0 x1F2);
inb(0 x1F2);
inb(0 x1F2);
if (inb(0 x1F2) == 0 x00)
printk(KERN_INFO "PDC20230-B VLB ATA "
"controller detected.\n" );
local_irq_restore(flags);
return BIOS;
}
}
if (ht6560a & mask)
return HT6560A;
if (ht6560b & mask)
return HT6560B;
if (opti82c611a & mask)
return OPTI611A;
if (opti82c46x & mask)
return OPTI46X;
if (autospeed & mask)
return SNOOP;
return BIOS;
}
/**
* legacy_init_one - attach a legacy interface
* @ probe : probe record
*
* Register an ISA bus IDE interface . Such interfaces are PIO and we
* assume do not support IRQ sharing .
*/
static __init int legacy_init_one(struct legacy_probe *probe)
{
struct legacy_controller *controller = &controllers[probe->type];
int pio_modes = controller->pio_mask;
unsigned long io = probe->port;
u32 mask = (1 << probe->slot);
struct ata_port_operations *ops = controller->ops;
struct legacy_data *ld = &legacy_data[probe->slot];
struct ata_host *host = NULL;
struct ata_port *ap;
struct platform_device *pdev;
struct ata_device *dev;
void __iomem *io_addr, *ctrl_addr;
u32 iordy = (iordy_mask & mask) ? 0 : ATA_FLAG_NO_IORDY;
int ret;
iordy |= controller->flags;
pdev = platform_device_register_simple(DRV_NAME, probe->slot, NULL, 0 );
if (IS_ERR(pdev))
return PTR_ERR(pdev);
ret = -EBUSY;
if (devm_request_region(&pdev->dev, io, 8 , "pata_legacy" ) == NULL ||
devm_request_region(&pdev->dev, io + 0 x0206, 1 ,
"pata_legacy" ) == NULL)
goto fail;
ret = -ENOMEM;
io_addr = devm_ioport_map(&pdev->dev, io, 8 );
ctrl_addr = devm_ioport_map(&pdev->dev, io + 0 x0206, 1 );
if (!io_addr || !ctrl_addr)
goto fail;
ld->type = probe->type;
if (controller->setup)
if (controller->setup(pdev, probe, ld) < 0 )
goto fail;
host = ata_host_alloc(&pdev->dev, 1 );
if (!host)
goto fail;
ap = host->ports[0 ];
ap->ops = ops;
ap->pio_mask = pio_modes;
ap->flags |= ATA_FLAG_SLAVE_POSS | iordy;
ap->pflags |= controller->pflags;
ap->ioaddr.cmd_addr = io_addr;
ap->ioaddr.altstatus_addr = ctrl_addr;
ap->ioaddr.ctl_addr = ctrl_addr;
ata_sff_std_ports(&ap->ioaddr);
ap->host->private_data = ld;
ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx" , io, io + 0 x0206);
ret = ata_host_activate(host, probe->irq, ata_sff_interrupt, 0 ,
&legacy_sht);
if (ret)
goto fail;
async_synchronize_full();
ld->platform_dev = pdev;
/* Nothing found means we drop the port as its probably not there */
ret = -ENODEV;
ata_for_each_dev(dev, &ap->link, ALL) {
if (!ata_dev_absent(dev)) {
legacy_host[probe->slot] = host;
ld->platform_dev = pdev;
return 0 ;
}
}
ata_host_detach(host);
fail:
platform_device_unregister(pdev);
return ret;
}
/**
* legacy_check_special_cases - ATA special cases
* @ p : PCI device to check
* @ primary : set this if we find an ATA master
* @ secondary : set this if we find an ATA secondary
*
* A small number of vendors implemented early PCI ATA interfaces
* on bridge logic without the ATA interface being PCI visible .
* Where we have a matching PCI driver we must skip the relevant
* device here . If we don ' t know about it then the legacy driver
* is the right driver anyway .
*/
static void __init legacy_check_special_cases(struct pci_dev *p, int *primary,
int *secondary)
{
/* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
if (p->vendor == 0 x1078 && p->device == 0 x0000) {
*primary = *secondary = 1 ;
return ;
}
/* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
if (p->vendor == 0 x1078 && p->device == 0 x0002) {
*primary = *secondary = 1 ;
return ;
}
/* Intel MPIIX - PIO ATA on non PCI side of bridge */
if (p->vendor == 0 x8086 && p->device == 0 x1234) {
u16 r;
pci_read_config_word(p, 0 x6C, &r);
if (r & 0 x8000) {
/* ATA port enabled */
if (r & 0 x4000)
*secondary = 1 ;
else
*primary = 1 ;
}
return ;
}
}
static __init void probe_opti_vlb(void )
{
/* If an OPTI 82C46X is present find out where the channels are */
static const char *optis[4 ] = {
"3/463MV" , "5MV" ,
"5MVA" , "5MVB"
};
u8 chans = 1 ;
u8 ctrl = (opti_syscfg(0 x30) & 0 xC0) >> 6 ;
opti82c46x = 3 ; /* Assume master and slave first */
printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n" ,
optis[ctrl]);
if (ctrl == 3 )
chans = (opti_syscfg(0 x3F) & 0 x20) ? 2 : 1 ;
ctrl = opti_syscfg(0 xAC);
/* Check enabled and this port is the 465MV port. On the
MVB we may have two channels */
if (ctrl & 8 ) {
if (chans == 2 ) {
legacy_probe_add(0 x1F0, 14 , OPTI46X, 0 );
legacy_probe_add(0 x170, 15 , OPTI46X, 0 );
}
if (ctrl & 4 )
legacy_probe_add(0 x170, 15 , OPTI46X, 0 );
else
legacy_probe_add(0 x1F0, 14 , OPTI46X, 0 );
} else
legacy_probe_add(0 x1F0, 14 , OPTI46X, 0 );
}
static __init void qdi65_identify_port(u8 r, u8 res, unsigned long port)
{
static const unsigned long ide_port[2 ] = { 0 x170, 0 x1F0 };
/* Check card type */
if ((r & 0 xF0) == 0 xC0) {
/* QD6500: single channel */
if (r & 8 )
/* Disabled ? */
return ;
legacy_probe_add(ide_port[r & 0 x01], 14 + (r & 0 x01),
QDI6500, port);
}
if (((r & 0 xF0) == 0 xA0) || (r & 0 xF0) == 0 x50) {
/* QD6580: dual channel */
if (!request_region(port + 2 , 2 , "pata_qdi" )) {
release_region(port, 2 );
return ;
}
res = inb(port + 3 );
/* Single channel mode ? */
if (res & 1 )
legacy_probe_add(ide_port[r & 0 x01], 14 + (r & 0 x01),
QDI6580, port);
else { /* Dual channel mode */
legacy_probe_add(0 x1F0, 14 , QDI6580DP, port);
/* port + 0x02, r & 0x04 */
legacy_probe_add(0 x170, 15 , QDI6580DP, port + 2 );
}
release_region(port + 2 , 2 );
}
}
static __init void probe_qdi_vlb(void )
{
unsigned long flags;
static const unsigned long qd_port[2 ] = { 0 x30, 0 xB0 };
int i;
/*
* Check each possible QD65xx base address
*/
for (i = 0 ; i < 2 ; i++) {
unsigned long port = qd_port[i];
u8 r, res;
if (request_region(port, 2 , "pata_qdi" )) {
/* Check for a card */
local_irq_save(flags);
/* I have no h/w that needs this delay but it
is present in the historic code */
r = inb(port);
udelay(1 );
outb(0 x19, port);
udelay(1 );
res = inb(port);
udelay(1 );
outb(r, port);
udelay(1 );
local_irq_restore(flags);
/* Fail */
if (res == 0 x19) {
release_region(port, 2 );
continue ;
}
/* Passes the presence test */
r = inb(port + 1 );
udelay(1 );
/* Check port agrees with port set */
if ((r & 2 ) >> 1 == i)
qdi65_identify_port(r, res, port);
release_region(port, 2 );
}
}
}
/**
* legacy_init - attach legacy interfaces
*
* Attach legacy IDE interfaces by scanning the usual IRQ / port suspects .
* Right now we do not scan the ide0 and ide1 address but should do so
* for non PCI systems or systems with no PCI IDE legacy mode devices .
* If you fix that note there are special cases to consider like VLB
* drivers and CS5510 / 20 .
*/
static __init int legacy_init(void )
{
int i;
int ct = 0 ;
int primary = 0 ;
int secondary = 0 ;
int pci_present = 0 ;
struct legacy_probe *pl = &probe_list[0 ];
int slot = 0 ;
struct pci_dev *p = NULL;
for_each_pci_dev(p) {
int r;
/* Check for any overlap of the system ATA mappings. Native
mode controllers stuck on these addresses or some devices
in 'raid' mode won't be found by the storage class test */
for (r = 0 ; r < 6 ; r++) {
if (pci_resource_start(p, r) == 0 x1f0)
primary = 1 ;
if (pci_resource_start(p, r) == 0 x170)
secondary = 1 ;
}
/* Check for special cases */
legacy_check_special_cases(p, &primary, &secondary);
/* If PCI bus is present then don't probe for tertiary
legacy ports */
pci_present = 1 ;
}
if (winbond == 1 )
winbond = 0 x130; /* Default port, alt is 1B0 */
if (primary == 0 || all)
legacy_probe_add(0 x1F0, 14 , UNKNOWN, 0 );
if (secondary == 0 || all)
legacy_probe_add(0 x170, 15 , UNKNOWN, 0 );
if (probe_all || !pci_present) {
/* ISA/VLB extra ports */
legacy_probe_add(0 x1E8, 11 , UNKNOWN, 0 );
legacy_probe_add(0 x168, 10 , UNKNOWN, 0 );
legacy_probe_add(0 x1E0, 8 , UNKNOWN, 0 );
legacy_probe_add(0 x160, 12 , UNKNOWN, 0 );
}
if (opti82c46x)
probe_opti_vlb();
if (qdi)
probe_qdi_vlb();
for (i = 0 ; i < NR_HOST; i++, pl++) {
if (pl->port == 0 )
continue ;
if (pl->type == UNKNOWN)
pl->type = probe_chip_type(pl);
pl->slot = slot++;
if (legacy_init_one(pl) == 0 )
ct++;
}
if (ct != 0 )
return 0 ;
return -ENODEV;
}
static __exit void legacy_exit(void )
{
int i;
for (i = 0 ; i < NR_HOST; i++) {
struct legacy_data *ld = &legacy_data[i];
if (legacy_host[i])
ata_host_detach(legacy_host[i]);
platform_device_unregister(ld->platform_dev);
}
}
MODULE_AUTHOR("Alan Cox" );
MODULE_DESCRIPTION("low-level driver for legacy ATA" );
MODULE_LICENSE("GPL" );
MODULE_VERSION(DRV_VERSION);
MODULE_ALIAS("pata_qdi" );
MODULE_ALIAS("pata_winbond" );
module_init(legacy_init);
module_exit(legacy_exit);
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(vorverarbeitet am 2026-10-11)
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