2009-06-24 11:29:44 -06:00
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/*
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* pata_rdc - Driver for later RDC PATA controllers
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*
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* This is actually a driver for hardware meeting
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* INCITS 370-2004 (1510D): ATA Host Adapter Standards
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*
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* Based on ata_piix.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 02:04:11 -06:00
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#include <linux/gfp.h>
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2009-06-24 11:29:44 -06:00
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <linux/dmi.h>
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#define DRV_NAME "pata_rdc"
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#define DRV_VERSION "0.01"
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struct rdc_host_priv {
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u32 saved_iocfg;
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};
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/**
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* rdc_pata_cable_detect - Probe host controller cable detect info
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* @ap: Port for which cable detect info is desired
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*
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* Read 80c cable indicator from ATA PCI device's PCI config
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* register. This register is normally set by firmware (BIOS).
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static int rdc_pata_cable_detect(struct ata_port *ap)
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{
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struct rdc_host_priv *hpriv = ap->host->private_data;
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u8 mask;
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/* check BIOS cable detect results */
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mask = 0x30 << (2 * ap->port_no);
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if ((hpriv->saved_iocfg & mask) == 0)
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return ATA_CBL_PATA40;
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return ATA_CBL_PATA80;
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}
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/**
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* rdc_pata_prereset - prereset for PATA host controller
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* @link: Target link
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* @deadline: deadline jiffies for the operation
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static int rdc_pata_prereset(struct ata_link *link, unsigned long deadline)
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{
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struct ata_port *ap = link->ap;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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static const struct pci_bits rdc_enable_bits[] = {
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{ 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
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{ 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
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};
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if (!pci_test_config_bits(pdev, &rdc_enable_bits[ap->port_no]))
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return -ENOENT;
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return ata_sff_prereset(link, deadline);
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}
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2011-10-13 08:06:04 -06:00
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static DEFINE_SPINLOCK(rdc_lock);
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2009-06-24 11:29:44 -06:00
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/**
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* rdc_set_piomode - Initialize host controller PATA PIO timings
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* @ap: Port whose timings we are configuring
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* @adev: um
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*
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* Set PIO mode for device, in host controller PCI config space.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void rdc_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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unsigned int pio = adev->pio_mode - XFER_PIO_0;
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struct pci_dev *dev = to_pci_dev(ap->host->dev);
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2011-10-13 08:06:04 -06:00
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unsigned long flags;
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2009-06-24 11:29:44 -06:00
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unsigned int is_slave = (adev->devno != 0);
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unsigned int master_port= ap->port_no ? 0x42 : 0x40;
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unsigned int slave_port = 0x44;
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u16 master_data;
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u8 slave_data;
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u8 udma_enable;
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int control = 0;
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static const /* ISP RTC */
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u8 timings[][2] = { { 0, 0 },
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{ 0, 0 },
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{ 1, 0 },
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{ 2, 1 },
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{ 2, 3 }, };
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if (pio >= 2)
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control |= 1; /* TIME1 enable */
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if (ata_pio_need_iordy(adev))
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control |= 2; /* IE enable */
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if (adev->class == ATA_DEV_ATA)
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control |= 4; /* PPE enable */
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2011-10-13 08:06:04 -06:00
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spin_lock_irqsave(&rdc_lock, flags);
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2009-06-24 11:29:44 -06:00
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/* PIO configuration clears DTE unconditionally. It will be
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* programmed in set_dmamode which is guaranteed to be called
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* after set_piomode if any DMA mode is available.
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*/
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pci_read_config_word(dev, master_port, &master_data);
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if (is_slave) {
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/* clear TIME1|IE1|PPE1|DTE1 */
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master_data &= 0xff0f;
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/* Enable SITRE (separate slave timing register) */
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master_data |= 0x4000;
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/* enable PPE1, IE1 and TIME1 as needed */
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master_data |= (control << 4);
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pci_read_config_byte(dev, slave_port, &slave_data);
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slave_data &= (ap->port_no ? 0x0f : 0xf0);
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/* Load the timing nibble for this slave */
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slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
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<< (ap->port_no ? 4 : 0);
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} else {
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/* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
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master_data &= 0xccf0;
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/* Enable PPE, IE and TIME as appropriate */
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master_data |= control;
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/* load ISP and RCT */
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master_data |=
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(timings[pio][0] << 12) |
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(timings[pio][1] << 8);
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}
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pci_write_config_word(dev, master_port, master_data);
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if (is_slave)
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pci_write_config_byte(dev, slave_port, slave_data);
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/* Ensure the UDMA bit is off - it will be turned back on if
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UDMA is selected */
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pci_read_config_byte(dev, 0x48, &udma_enable);
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udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
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pci_write_config_byte(dev, 0x48, udma_enable);
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2011-10-13 08:06:04 -06:00
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spin_unlock_irqrestore(&rdc_lock, flags);
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2009-06-24 11:29:44 -06:00
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}
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/**
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* rdc_set_dmamode - Initialize host controller PATA PIO timings
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* @ap: Port whose timings we are configuring
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* @adev: Drive in question
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*
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* Set UDMA mode for device, in host controller PCI config space.
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void rdc_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *dev = to_pci_dev(ap->host->dev);
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2011-10-13 08:06:04 -06:00
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unsigned long flags;
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2009-06-24 11:29:44 -06:00
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u8 master_port = ap->port_no ? 0x42 : 0x40;
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u16 master_data;
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u8 speed = adev->dma_mode;
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int devid = adev->devno + 2 * ap->port_no;
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u8 udma_enable = 0;
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static const /* ISP RTC */
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u8 timings[][2] = { { 0, 0 },
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{ 0, 0 },
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{ 1, 0 },
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{ 2, 1 },
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{ 2, 3 }, };
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2011-10-13 08:06:04 -06:00
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spin_lock_irqsave(&rdc_lock, flags);
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2009-06-24 11:29:44 -06:00
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pci_read_config_word(dev, master_port, &master_data);
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pci_read_config_byte(dev, 0x48, &udma_enable);
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if (speed >= XFER_UDMA_0) {
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unsigned int udma = adev->dma_mode - XFER_UDMA_0;
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u16 udma_timing;
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u16 ideconf;
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int u_clock, u_speed;
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/*
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* UDMA is handled by a combination of clock switching and
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* selection of dividers
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*
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* Handy rule: Odd modes are UDMATIMx 01, even are 02
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* except UDMA0 which is 00
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*/
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u_speed = min(2 - (udma & 1), udma);
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if (udma == 5)
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u_clock = 0x1000; /* 100Mhz */
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else if (udma > 2)
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u_clock = 1; /* 66Mhz */
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else
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u_clock = 0; /* 33Mhz */
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udma_enable |= (1 << devid);
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/* Load the CT/RP selection */
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pci_read_config_word(dev, 0x4A, &udma_timing);
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udma_timing &= ~(3 << (4 * devid));
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udma_timing |= u_speed << (4 * devid);
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pci_write_config_word(dev, 0x4A, udma_timing);
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/* Select a 33/66/100Mhz clock */
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pci_read_config_word(dev, 0x54, &ideconf);
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ideconf &= ~(0x1001 << devid);
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ideconf |= u_clock << devid;
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pci_write_config_word(dev, 0x54, ideconf);
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} else {
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/*
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* MWDMA is driven by the PIO timings. We must also enable
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* IORDY unconditionally along with TIME1. PPE has already
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* been set when the PIO timing was set.
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*/
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unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0;
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unsigned int control;
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u8 slave_data;
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const unsigned int needed_pio[3] = {
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XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
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};
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int pio = needed_pio[mwdma] - XFER_PIO_0;
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control = 3; /* IORDY|TIME1 */
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/* If the drive MWDMA is faster than it can do PIO then
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we must force PIO into PIO0 */
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if (adev->pio_mode < needed_pio[mwdma])
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/* Enable DMA timing only */
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control |= 8; /* PIO cycles in PIO0 */
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if (adev->devno) { /* Slave */
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master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */
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master_data |= control << 4;
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pci_read_config_byte(dev, 0x44, &slave_data);
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slave_data &= (ap->port_no ? 0x0f : 0xf0);
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/* Load the matching timing */
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slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
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pci_write_config_byte(dev, 0x44, slave_data);
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} else { /* Master */
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master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY
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and master timing bits */
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master_data |= control;
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master_data |=
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(timings[pio][0] << 12) |
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(timings[pio][1] << 8);
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}
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udma_enable &= ~(1 << devid);
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pci_write_config_word(dev, master_port, master_data);
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}
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pci_write_config_byte(dev, 0x48, udma_enable);
|
2011-10-13 08:06:04 -06:00
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spin_unlock_irqrestore(&rdc_lock, flags);
|
2009-06-24 11:29:44 -06:00
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}
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static struct ata_port_operations rdc_pata_ops = {
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.inherits = &ata_bmdma32_port_ops,
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.cable_detect = rdc_pata_cable_detect,
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.set_piomode = rdc_set_piomode,
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.set_dmamode = rdc_set_dmamode,
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.prereset = rdc_pata_prereset,
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};
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static struct ata_port_info rdc_port_info = {
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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2009-12-03 15:52:16 -07:00
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.mwdma_mask = ATA_MWDMA12_ONLY,
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2009-06-24 11:29:44 -06:00
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.udma_mask = ATA_UDMA5,
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.port_ops = &rdc_pata_ops,
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};
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static struct scsi_host_template rdc_sht = {
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ATA_BMDMA_SHT(DRV_NAME),
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};
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/**
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|
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* rdc_init_one - Register PIIX ATA PCI device with kernel services
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* @pdev: PCI device to register
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* @ent: Entry in rdc_pci_tbl matching with @pdev
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*
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* Called from kernel PCI layer. We probe for combined mode (sigh),
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* and then hand over control to libata, for it to do the rest.
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*
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* LOCKING:
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* Inherited from PCI layer (may sleep).
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*
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* RETURNS:
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* Zero on success, or -ERRNO value.
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|
*/
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static int __devinit rdc_init_one(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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|
{
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struct device *dev = &pdev->dev;
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struct ata_port_info port_info[2];
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const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
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|
|
unsigned long port_flags;
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|
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struct ata_host *host;
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|
|
struct rdc_host_priv *hpriv;
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|
|
int rc;
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|
|
|
2011-04-15 16:52:00 -06:00
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|
ata_print_version_once(&pdev->dev, DRV_VERSION);
|
2009-06-24 11:29:44 -06:00
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port_info[0] = rdc_port_info;
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|
port_info[1] = rdc_port_info;
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|
port_flags = port_info[0].flags;
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|
|
|
|
|
|
/* enable device and prepare host */
|
|
|
|
rc = pcim_enable_device(pdev);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
|
|
|
|
if (!hpriv)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
/* Save IOCFG, this will be used for cable detection, quirk
|
|
|
|
* detection and restoration on detach.
|
|
|
|
*/
|
|
|
|
pci_read_config_dword(pdev, 0x54, &hpriv->saved_iocfg);
|
|
|
|
|
2010-05-19 14:10:22 -06:00
|
|
|
rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
|
2009-06-24 11:29:44 -06:00
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
host->private_data = hpriv;
|
|
|
|
|
|
|
|
pci_intx(pdev, 1);
|
|
|
|
|
|
|
|
host->flags |= ATA_HOST_PARALLEL_SCAN;
|
|
|
|
|
|
|
|
pci_set_master(pdev);
|
2010-05-19 14:10:21 -06:00
|
|
|
return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, &rdc_sht);
|
2009-06-24 11:29:44 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static void rdc_remove_one(struct pci_dev *pdev)
|
|
|
|
{
|
|
|
|
struct ata_host *host = dev_get_drvdata(&pdev->dev);
|
|
|
|
struct rdc_host_priv *hpriv = host->private_data;
|
|
|
|
|
|
|
|
pci_write_config_dword(pdev, 0x54, hpriv->saved_iocfg);
|
|
|
|
|
|
|
|
ata_pci_remove_one(pdev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct pci_device_id rdc_pci_tbl[] = {
|
|
|
|
{ PCI_DEVICE(0x17F3, 0x1011), },
|
|
|
|
{ PCI_DEVICE(0x17F3, 0x1012), },
|
|
|
|
{ } /* terminate list */
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct pci_driver rdc_pci_driver = {
|
|
|
|
.name = DRV_NAME,
|
|
|
|
.id_table = rdc_pci_tbl,
|
|
|
|
.probe = rdc_init_one,
|
|
|
|
.remove = rdc_remove_one,
|
2011-10-13 08:06:31 -06:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
.suspend = ata_pci_device_suspend,
|
|
|
|
.resume = ata_pci_device_resume,
|
|
|
|
#endif
|
2009-06-24 11:29:44 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
|
2012-04-18 23:43:05 -06:00
|
|
|
module_pci_driver(rdc_pci_driver);
|
2009-06-24 11:29:44 -06:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Alan Cox (based on ata_piix)");
|
|
|
|
MODULE_DESCRIPTION("SCSI low-level driver for RDC PATA controllers");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_DEVICE_TABLE(pci, rdc_pci_tbl);
|
|
|
|
MODULE_VERSION(DRV_VERSION);
|