2006-10-27 20:08:48 -06:00
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/*
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* Generic platform device PATA driver
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*
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2007-11-07 19:15:21 -07:00
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* Copyright (C) 2006 - 2007 Paul Mundt
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2006-10-27 20:08:48 -06:00
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*
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* Based on pata_pcmcia:
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*
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2008-10-27 09:09:10 -06:00
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* Copyright 2005-2006 Red Hat Inc, all rights reserved.
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2006-10-27 20:08:48 -06:00
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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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/blkdev.h>
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#include <scsi/scsi_host.h>
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#include <linux/ata.h>
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#include <linux/libata.h>
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#include <linux/platform_device.h>
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2008-02-01 16:02:30 -07:00
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#include <linux/ata_platform.h>
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2006-10-27 20:08:48 -06:00
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#define DRV_NAME "pata_platform"
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2007-11-07 19:15:21 -07:00
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#define DRV_VERSION "1.2"
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2006-10-27 20:08:48 -06:00
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static int pio_mask = 1;
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/*
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* Provide our own set_mode() as we don't want to change anything that has
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* already been configured..
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*/
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2007-08-06 03:36:23 -06:00
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static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused)
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2006-10-27 20:08:48 -06:00
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{
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2007-08-06 03:36:23 -06:00
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struct ata_device *dev;
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2006-10-27 20:08:48 -06:00
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2008-11-03 04:03:17 -07:00
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ata_for_each_dev(dev, link, ENABLED) {
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/* We don't really care */
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dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
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dev->xfer_shift = ATA_SHIFT_PIO;
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dev->flags |= ATA_DFLAG_PIO;
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ata: Convert ata_<foo>_printk(KERN_<LEVEL> to ata_<foo>_<level>
Saves text by removing nearly duplicated text format strings by
creating ata_<foo>_printk functions and printf extension %pV.
ata defconfig size shrinks ~5% (~8KB), allyesconfig ~2.5% (~13KB)
Format string duplication comes from:
#define ata_link_printk(link, lv, fmt, args...) do { \
if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
(link)->pmp , ##args); \
else \
printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
} while(0)
Coalesce long formats.
$ size drivers/ata/built-in.*
text data bss dec hex filename
544969 73893 116584 735446 b38d6 drivers/ata/built-in.allyesconfig.ata.o
558429 73893 117864 750186 b726a drivers/ata/built-in.allyesconfig.dev_level.o
141328 14689 4220 160237 271ed drivers/ata/built-in.defconfig.ata.o
149567 14689 4220 168476 2921c drivers/ata/built-in.defconfig.dev_level.o
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2011-04-15 16:51:59 -06:00
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ata_dev_info(dev, "configured for PIO\n");
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2006-10-27 20:08:48 -06:00
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}
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2007-01-30 06:23:45 -07:00
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return 0;
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2006-10-27 20:08:48 -06:00
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}
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static struct scsi_host_template pata_platform_sht = {
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2008-03-24 21:22:49 -06:00
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ATA_PIO_SHT(DRV_NAME),
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2006-10-27 20:08:48 -06:00
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};
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static struct ata_port_operations pata_platform_port_ops = {
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
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.inherits = &ata_sff_port_ops,
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2008-04-07 07:47:16 -06:00
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.sff_data_xfer = ata_sff_data_xfer_noirq,
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libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
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.cable_detect = ata_cable_unknown,
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.set_mode = pata_platform_set_mode,
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2006-10-27 20:08:48 -06:00
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};
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static void pata_platform_setup_port(struct ata_ioports *ioaddr,
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2008-01-09 12:10:22 -07:00
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unsigned int shift)
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2006-10-27 20:08:48 -06:00
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{
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/* Fixup the port shift for platforms that need it */
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ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
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ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
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ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
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ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
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ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
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ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
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ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
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ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
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ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
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ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
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}
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/**
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2008-01-09 12:10:22 -07:00
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* __pata_platform_probe - attach a platform interface
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* @dev: device
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* @io_res: Resource representing I/O base
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* @ctl_res: Resource representing CTL base
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* @irq_res: Resource representing IRQ and its flags
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* @ioport_shift: I/O port shift
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* @__pio_mask: PIO mask
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2006-10-27 20:08:48 -06:00
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*
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* Register a platform bus IDE interface. Such interfaces are PIO and we
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* assume do not support IRQ sharing.
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*
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2007-11-07 19:15:21 -07:00
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* Platform devices are expected to contain at least 2 resources per port:
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2006-10-27 20:08:48 -06:00
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*
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* - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
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* - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
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2007-11-07 19:15:21 -07:00
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*
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* and optionally:
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*
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2006-10-27 20:08:48 -06:00
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* - IRQ (IORESOURCE_IRQ)
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*
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* If the base resources are both mem types, the ioremap() is handled
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* here. For IORESOURCE_IO, it's assumed that there's no remapping
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* necessary.
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2007-11-07 19:15:21 -07:00
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*
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* If no IRQ resource is present, PIO polling mode is used instead.
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2006-10-27 20:08:48 -06:00
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*/
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2012-12-21 14:19:58 -07:00
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int __pata_platform_probe(struct device *dev, struct resource *io_res,
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struct resource *ctl_res, struct resource *irq_res,
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unsigned int ioport_shift, int __pio_mask)
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2006-10-27 20:08:48 -06:00
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{
|
libata: convert the remaining PATA drivers to new init model
Convert pdc_adma, pata_cs5520, pata_isapnp, pata_ixp4xx_cf,
pata_legacy, pata_mpc52xx, pata_mpiix, pata_pcmcia, pata_pdc2027x,
pata_platform, pata_qdi, pata_scc and pata_winbond to new init model.
* init_one()'s now follow more consistent init order
* cs5520 now registers one host with two ports, not two hosts. If any
of the two ports are disabled, it's made dummy as other drivers do.
Tested pdc_adma and pata_legacy. Both are as broken as before. The
rest are compile tested only.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-17 08:44:08 -06:00
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struct ata_host *host;
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struct ata_port *ap;
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2006-10-27 20:08:48 -06:00
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unsigned int mmio;
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2008-01-09 12:10:22 -07:00
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int irq = 0;
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int irq_flags = 0;
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2006-10-27 20:08:48 -06:00
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/*
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* Check for MMIO
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*/
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mmio = (( io_res->flags == IORESOURCE_MEM) &&
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(ctl_res->flags == IORESOURCE_MEM));
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2007-11-07 19:15:21 -07:00
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/*
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* And the IRQ
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*/
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2008-01-09 12:10:22 -07:00
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if (irq_res && irq_res->start > 0) {
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irq = irq_res->start;
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2014-08-23 04:45:47 -06:00
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irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
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2008-01-09 12:10:22 -07:00
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}
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2007-11-07 19:15:21 -07:00
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2006-10-27 20:08:48 -06:00
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/*
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* Now that that's out of the way, wire up the port..
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*/
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2008-01-09 12:10:22 -07:00
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host = ata_host_alloc(dev, 1);
|
libata: convert the remaining PATA drivers to new init model
Convert pdc_adma, pata_cs5520, pata_isapnp, pata_ixp4xx_cf,
pata_legacy, pata_mpc52xx, pata_mpiix, pata_pcmcia, pata_pdc2027x,
pata_platform, pata_qdi, pata_scc and pata_winbond to new init model.
* init_one()'s now follow more consistent init order
* cs5520 now registers one host with two ports, not two hosts. If any
of the two ports are disabled, it's made dummy as other drivers do.
Tested pdc_adma and pata_legacy. Both are as broken as before. The
rest are compile tested only.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-17 08:44:08 -06:00
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if (!host)
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return -ENOMEM;
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ap = host->ports[0];
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ap->ops = &pata_platform_port_ops;
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2008-01-09 12:10:22 -07:00
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ap->pio_mask = __pio_mask;
|
libata: convert the remaining PATA drivers to new init model
Convert pdc_adma, pata_cs5520, pata_isapnp, pata_ixp4xx_cf,
pata_legacy, pata_mpc52xx, pata_mpiix, pata_pcmcia, pata_pdc2027x,
pata_platform, pata_qdi, pata_scc and pata_winbond to new init model.
* init_one()'s now follow more consistent init order
* cs5520 now registers one host with two ports, not two hosts. If any
of the two ports are disabled, it's made dummy as other drivers do.
Tested pdc_adma and pata_legacy. Both are as broken as before. The
rest are compile tested only.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-17 08:44:08 -06:00
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ap->flags |= ATA_FLAG_SLAVE_POSS;
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2006-10-27 20:08:48 -06:00
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2007-11-07 19:15:21 -07:00
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/*
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* Use polling mode if there's no IRQ
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*/
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if (!irq) {
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ap->flags |= ATA_FLAG_PIO_POLLING;
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ata_port_desc(ap, "no IRQ, using PIO polling");
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}
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2006-10-27 20:08:48 -06:00
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/*
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* Handle the MMIO case
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*/
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if (mmio) {
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2008-01-09 12:10:22 -07:00
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ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
|
2009-08-06 17:05:08 -06:00
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resource_size(io_res));
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2008-01-09 12:10:22 -07:00
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ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
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2009-08-06 17:05:08 -06:00
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resource_size(ctl_res));
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2006-10-27 20:08:48 -06:00
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} else {
|
2008-01-09 12:10:22 -07:00
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ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
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2009-08-06 17:05:08 -06:00
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resource_size(io_res));
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2008-01-09 12:10:22 -07:00
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ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
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2009-08-06 17:05:08 -06:00
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resource_size(ctl_res));
|
2007-01-31 23:06:36 -07:00
|
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}
|
libata: convert the remaining PATA drivers to new init model
Convert pdc_adma, pata_cs5520, pata_isapnp, pata_ixp4xx_cf,
pata_legacy, pata_mpc52xx, pata_mpiix, pata_pcmcia, pata_pdc2027x,
pata_platform, pata_qdi, pata_scc and pata_winbond to new init model.
* init_one()'s now follow more consistent init order
* cs5520 now registers one host with two ports, not two hosts. If any
of the two ports are disabled, it's made dummy as other drivers do.
Tested pdc_adma and pata_legacy. Both are as broken as before. The
rest are compile tested only.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-17 08:44:08 -06:00
|
|
|
if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
|
2008-01-09 12:10:22 -07:00
|
|
|
dev_err(dev, "failed to map IO/CTL base\n");
|
2007-01-31 23:06:36 -07:00
|
|
|
return -ENOMEM;
|
2006-10-27 20:08:48 -06:00
|
|
|
}
|
|
|
|
|
libata: convert the remaining PATA drivers to new init model
Convert pdc_adma, pata_cs5520, pata_isapnp, pata_ixp4xx_cf,
pata_legacy, pata_mpc52xx, pata_mpiix, pata_pcmcia, pata_pdc2027x,
pata_platform, pata_qdi, pata_scc and pata_winbond to new init model.
* init_one()'s now follow more consistent init order
* cs5520 now registers one host with two ports, not two hosts. If any
of the two ports are disabled, it's made dummy as other drivers do.
Tested pdc_adma and pata_legacy. Both are as broken as before. The
rest are compile tested only.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-17 08:44:08 -06:00
|
|
|
ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
|
2006-10-27 20:08:48 -06:00
|
|
|
|
2008-01-09 12:10:22 -07:00
|
|
|
pata_platform_setup_port(&ap->ioaddr, ioport_shift);
|
2006-10-27 20:08:48 -06:00
|
|
|
|
2007-08-17 22:14:55 -06:00
|
|
|
ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
|
|
|
|
(unsigned long long)io_res->start,
|
|
|
|
(unsigned long long)ctl_res->start);
|
|
|
|
|
libata: convert the remaining PATA drivers to new init model
Convert pdc_adma, pata_cs5520, pata_isapnp, pata_ixp4xx_cf,
pata_legacy, pata_mpc52xx, pata_mpiix, pata_pcmcia, pata_pdc2027x,
pata_platform, pata_qdi, pata_scc and pata_winbond to new init model.
* init_one()'s now follow more consistent init order
* cs5520 now registers one host with two ports, not two hosts. If any
of the two ports are disabled, it's made dummy as other drivers do.
Tested pdc_adma and pata_legacy. Both are as broken as before. The
rest are compile tested only.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-04-17 08:44:08 -06:00
|
|
|
/* activate */
|
2008-04-07 07:47:16 -06:00
|
|
|
return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
|
2008-01-09 12:10:22 -07:00
|
|
|
irq_flags, &pata_platform_sht);
|
2006-10-27 20:08:48 -06:00
|
|
|
}
|
2008-01-09 12:10:22 -07:00
|
|
|
EXPORT_SYMBOL_GPL(__pata_platform_probe);
|
2006-10-27 20:08:48 -06:00
|
|
|
|
2012-12-21 14:19:58 -07:00
|
|
|
static int pata_platform_probe(struct platform_device *pdev)
|
2008-01-09 12:10:22 -07:00
|
|
|
{
|
|
|
|
struct resource *io_res;
|
|
|
|
struct resource *ctl_res;
|
|
|
|
struct resource *irq_res;
|
2013-07-30 02:16:05 -06:00
|
|
|
struct pata_platform_info *pp_info = dev_get_platdata(&pdev->dev);
|
2008-01-09 12:10:22 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Simple resource validation ..
|
|
|
|
*/
|
|
|
|
if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
|
|
|
|
dev_err(&pdev->dev, "invalid number of resources\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get the I/O base first
|
|
|
|
*/
|
|
|
|
io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
|
|
if (io_res == NULL) {
|
|
|
|
io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
if (unlikely(io_res == NULL))
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Then the CTL base
|
|
|
|
*/
|
|
|
|
ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
|
|
|
|
if (ctl_res == NULL) {
|
|
|
|
ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
|
|
if (unlikely(ctl_res == NULL))
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* And the IRQ
|
|
|
|
*/
|
|
|
|
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
|
|
|
|
|
|
return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
|
|
|
|
pp_info ? pp_info->ioport_shift : 0,
|
|
|
|
pio_mask);
|
|
|
|
}
|
|
|
|
|
2006-10-27 20:08:48 -06:00
|
|
|
static struct platform_driver pata_platform_driver = {
|
|
|
|
.probe = pata_platform_probe,
|
2012-11-02 01:46:23 -06:00
|
|
|
.remove = ata_platform_remove_one,
|
2006-10-27 20:08:48 -06:00
|
|
|
.driver = {
|
|
|
|
.name = DRV_NAME,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2011-11-26 23:44:26 -07:00
|
|
|
module_platform_driver(pata_platform_driver);
|
2006-10-27 20:08:48 -06:00
|
|
|
|
|
|
|
module_param(pio_mask, int, 0);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Paul Mundt");
|
|
|
|
MODULE_DESCRIPTION("low-level driver for platform device ATA");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_VERSION(DRV_VERSION);
|
2008-04-18 14:41:57 -06:00
|
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|