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pata_legacy.c
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pata_legacy.c
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/*
* pata-legacy.c - Legacy port PATA/SATA controller driver.
* Copyright 2005/2006 Red Hat <alan@redhat.com>, all rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* An ATA driver for the legacy ATA ports.
*
* Data Sources:
* Opti 82C465/82C611 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
*
* 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 20230c/20630/winbond83759A
*
* 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-1288A-125, UMC 82C871F, Winbond W83759,
* Winbond W83759A, Promise PDC20230-B
*
* For now use autospeed and pio_mask as above with the W83759A. This may
* change.
*
*/
#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, "Grab all legacy port devices, even if PCI(0=off, 1=on)");
struct legacy_data {
unsigned long timing;
u8 clock[2];
u8 last;
int fast;
struct platform_device *platform_dev;
};
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_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;
int (*setup)(struct platform_device *, struct legacy_probe *probe,
struct legacy_data *data);
};
static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
static struct legacy_probe probe_list[NR_HOST];
static struct legacy_data legacy_data[NR_HOST];
static struct ata_host *legacy_host[NR_HOST];
static int nr_legacy_host;
static int probe_all; /* Set to check all ISA port ranges */
static int ht6560a; /* HT 6560A on primary 1, second 2, both 3 */
static int ht6560b; /* HT 6560A on primary 1, second 2, both 3 */
static int opti82c611a; /* Opti82c611A on primary 1, sec 2, both 3 */
static int opti82c46x; /* Opti 82c465MV present(pri/sec autodetect) */
static int qdi; /* Set to probe QDI controllers */
static int winbond; /* Set to probe Winbond controllers,
give I/O port if non standard */
static int autospeed; /* Chip present which snoops speed changes */
static int pio_mask = 0x1F; /* PIO range for autospeed devices */
static int iordy_mask = 0xFFFFFFFF; /* Use iordy if available */
/**
* 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) {
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_link_for_each_dev(dev, link) {
if (ata_dev_enabled(dev)) {
ata_dev_printk(dev, KERN_INFO,
"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 struct scsi_host_template legacy_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,
};
/*
* 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 0x1F by setting
* pio_mask as well.
*/
static struct ata_port_operations simple_port_ops = {
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer_noirq,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
static struct ata_port_operations legacy_port_ops = {
.set_mode = legacy_set_mode,
.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,
.cable_detect = ata_cable_40wire,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer_noirq,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
/*
* Promise 20230C and 20620 support
*
* This controller supports PIO0 to PIO2. We set PIO timings
* conservatively to allow for 50MHz 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(0x1F5);
outb(inb(0x1F2) | 0x80, 0x1F2);
inb(0x1F2);
inb(0x3F6);
inb(0x3F6);
inb(0x1F2);
inb(0x1F2);
}
while ((inb(0x1F2) & 0x80) && --tries);
local_irq_restore(flags);
outb(inb(0x1F4) & 0x07, 0x1F4);
rt = inb(0x1F3);
rt &= 0x07 << (3 * adev->devno);
if (pio)
rt |= (1 + 3 * pio) << (3 * adev->devno);
udelay(100);
outb(inb(0x1F2) | 0x01, 0x1F2);
udelay(100);
inb(0x1F5);
}
static unsigned int pdc_data_xfer_vlb(struct ata_device *dev,
unsigned char *buf, unsigned int buflen, int rw)
{
if (ata_id_has_dword_io(dev->id)) {
struct ata_port *ap = dev->link->ap;
int slop = buflen & 3;
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)) {
u32 pad;
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_data_xfer_noirq(dev, buf, buflen, rw);
return buflen;
}
static struct ata_port_operations pdc20230_port_ops = {
.set_piomode = pdc20230_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = pdc_data_xfer_vlb,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
/*
* Holtek 6560A 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 = FIT(t.active, 2, 15);
recover = FIT(t.recover, 4, 15);
inb(0x3E6);
inb(0x3E6);
inb(0x3E6);
inb(0x3E6);
iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
ioread8(ap->ioaddr.status_addr);
}
static struct ata_port_operations ht6560a_port_ops = {
.set_piomode = ht6560a_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer, /* Check vlb/noirq */
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
/*
* Holtek 6560B 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 2nd 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 = FIT(t.active, 2, 15);
recover = FIT(t.recover, 2, 16);
recover &= 0x15;
inb(0x3E6);
inb(0x3E6);
inb(0x3E6);
inb(0x3E6);
iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
if (adev->class != ATA_DEV_ATA) {
u8 rconf = inb(0x3E6);
if (rconf & 0x24) {
rconf &= ~0x24;
outb(rconf, 0x3E6);
}
}
ioread8(ap->ioaddr.status_addr);
}
static struct ata_port_operations ht6560b_port_ops = {
.set_piomode = ht6560b_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer, /* FIXME: Check 32bit and noirq */
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
/*
* 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, 0x22);
r = inb(0x24);
local_irq_restore(flags);
return r;
}
/*
* Opti 82C611A
*
* 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) & 0x03];
/* 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 = FIT(t.active, 2, 17) - 2;
recover = FIT(t.recover, 1, 16) - 1;
setup = FIT(t.setup, 1, 4) - 1;
/* Select the right timing bank for write timing */
rc = ioread8(ap->ioaddr.lbal_addr);
rc &= 0x7F;
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 &= 0xC0;
rc |= adev->devno; /* Index select */
rc |= (setup << 4) | 0x04;
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 &= 0x73;
rc |= 0x84;
iowrite8(rc, ap->ioaddr.lbal_addr);
/* Exit command mode */
iowrite8(0x83, ap->ioaddr.nsect_addr);
}
static struct ata_port_operations opti82c611a_port_ops = {
.set_piomode = opti82c611a_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
/*
* Opti 82C465MV
*
* This controller supports PIO0 to PIO3. Unlike the 611A 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(0xAC) & 0xC0; /* 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 = FIT(t.active, 2, 17) - 2;
recover = FIT(t.recover, 1, 16) - 1;
setup = FIT(t.setup, 1, 4) - 1;
/* Select the right timing bank for write timing */
rc = ioread8(ap->ioaddr.lbal_addr);
rc &= 0x7F;
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 &= 0xC0;
rc |= adev->devno; /* Index select */
rc |= (setup << 4) | 0x04;
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 &= 0x73;
rc |= 0x84;
iowrite8(rc, ap->ioaddr.lbal_addr);
/* Exit command mode */
iowrite8(0x83, ap->ioaddr.nsect_addr);
/* We need to know this for quad device on the MVB */
ap->host->private_data = ap;
}
/**
* opt82c465mv_qc_issue_prot - 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_prot(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_qc_issue_prot(qc);
}
static struct ata_port_operations opti82c46x_port_ops = {
.set_piomode = opti82c46x_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = opti82c46x_qc_issue_prot,
.data_xfer = ata_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
static void qdi6500_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 - FIT(t.active, 1, 8);
recovery = 18 - FIT(t.recover, 3, 18);
} else {
active = 9 - FIT(t.active, 2, 9);
recovery = 15 - FIT(t.recover, 0, 15);
}
timing = (recovery << 4) | active | 0x08;
ld_qdi->clock[adev->devno] = timing;
outb(timing, ld_qdi->timing);
}
/**
* qdi6580dp_set_piomode - PIO setup for dual channel
* @ap: Port
* @adev: Device
* @irq: interrupt line
*
* In dual channel mode the 6580 has one clock per channel and we have
* to software clockswitch in qc_issue_prot.
*/
static void qdi6580dp_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 - FIT(t.active, 1, 8);
recovery = 18 - FIT(t.recover, 3, 18);
} else {
active = 9 - FIT(t.active, 2, 9);
recovery = 15 - FIT(t.recover, 0, 15);
}
timing = (recovery << 4) | active | 0x08;
ld_qdi->clock[adev->devno] = timing;
outb(timing, ld_qdi->timing + 2 * ap->port_no);
/* Clear the FIFO */
if (adev->class != ATA_DEV_ATA)
outb(0x5F, ld_qdi->timing + 3);
}
/**
* qdi6580_set_piomode - PIO setup for single channel
* @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.
*/
static void qdi6580_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 - FIT(t.active, 1, 8);
recovery = 18 - FIT(t.recover, 3, 18);
} else {
active = 9 - FIT(t.active, 2, 9);
recovery = 15 - FIT(t.recover, 0, 15);
}
timing = (recovery << 4) | active | 0x08;
ld_qdi->clock[adev->devno] = timing;
outb(timing, ld_qdi->timing + 2 * adev->devno);
/* Clear the FIFO */
if (adev->class != ATA_DEV_ATA)
outb(0x5F, ld_qdi->timing + 3);
}
/**
* qdi_qc_issue_prot - 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_prot(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_qc_issue_prot(qc);
}
static unsigned int vlb32_data_xfer(struct ata_device *adev, unsigned char *buf,
unsigned int buflen, int rw)
{
struct ata_port *ap = adev->link->ap;
int slop = buflen & 3;
if (ata_id_has_dword_io(adev->id)) {
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)) {
u32 pad;
if (rw == WRITE) {
memcpy(&pad, buf + buflen - slop, slop);
pad = le32_to_cpu(pad);
iowrite32(pad, ap->ioaddr.data_addr);
} else {
pad = ioread32(ap->ioaddr.data_addr);
pad = cpu_to_le32(pad);
memcpy(buf + buflen - slop, &pad, slop);
}
}
return (buflen + 3) & ~3;
} else
return ata_data_xfer(adev, 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 = {
.set_piomode = qdi6500_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = qdi_qc_issue_prot,
.data_xfer = vlb32_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
static struct ata_port_operations qdi6580_port_ops = {
.set_piomode = qdi6580_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = vlb32_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
static struct ata_port_operations qdi6580dp_port_ops = {
.set_piomode = qdi6580dp_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,