On Tue, Dec 7, 2010 at 4:59 PM, John W. Linville <linville@xxxxxxxxxxxxx> wrote:
> On Tue, Dec 07, 2010 at 04:57:08PM +0100, Sedat Dilek wrote:
>> On Tue, Dec 7, 2010 at 3:26 PM, John W. Linville <linville@xxxxxxxxxxxxx> wrote:
>> > On Tue, Dec 07, 2010 at 12:24:14PM +0100, Sedat Dilek wrote:
>> >
>> >> I have already reported on linux-wireless (short: l-w) ML that after
>> >> especially the merge of "AHB Bus support" patchset (see [2]) my ath5k
>> >> was not working as expected in daily use (also modinfo).
>> >>
>> >> I am not sure if it is the driver but reverting the 9 commits in my
>> >> local linux-next GIT seemed to "stabilize" a bit the Internet
>> >> connection.
>> >> The patchset from Nick (see below) definitely helped to stabilize ath5k.
>> >
>> > I imagine that these are the "9 commits" you mean:
>> >
>> >> git rev-list c30ae13..4cebb34
>> > 4cebb34caa5122216a1e2451eae9e0fc47ec2589
>> > a0b907ee2a71052fefdf6151764095f3f97b3275
>> > c31b5c9c806b1fbdc9e98885d897664a0d482989
>> > e7aecd327d80b2f156b54769013aaccb2a20645a
>> > 8efa5d7d6ad307ae2d220def37ca89594062c40d
>> > 4aa5d783c9e1c72e4950ff34f388077ccecac74a
>> > e5b046d86fac609f636d127a38de94a175c7e83b
>> > 132b1c3ee38ea6fa0501004fd0f19acb554e5a44
>> > aeae4ac9090462ea38387dcdbac4f01b944af6a4
>> >
>> > Most of those look fairly harmless so long as you don't define
>> > CONFIG_ATHEROS_AR231X. ÂJust to narrow things down...if you only revert
>> > the first 8 (i.e. leave aeae4ac alone), do you still have problems?
>> > Or does it still "stabilize"?
>> >
>> > That patch converts the driver to the generic DMA API. ÂIt seems
>> > OK at first glance, but I suspect it is the only one likely to be
>> > effecting your situation.
>> >
>> > John
>> > --
>> > John W. Linville        ÂSomeday the world will need a hero, and you
>> > linville@xxxxxxxxxxxxx         Âmight be all we have. ÂBe ready.
>> >
>>
>> Before jumping to another problem, I had a quick look into the
>> appropriate Kconfig file, as you say I have not CONFIG_ATHEROS_AR231X
>> set and that's why AHB support is not selected/built, instead
>>
>> Â CC [M] Âdrivers/net/wireless/ath/ath5k/pci.o
>>
>> is built.
>>
>> Unfortunately, I can't cleanly revert. Sorry, I can't help.
>
> I don't quite understand -- you said you were reverting them before,
> but now I ask you to revert one _less_ patch (i.e. the last one to
> be reverted anyway) and you can't do it?
>
> John
> --
> John W. Linville        ÂSomeday the world will need a hero, and you
> linville@xxxxxxxxxxxxx         Âmight be all we have. ÂBe ready.
>
I tested with a linux-next (next-20101206) with revert-at5k-patches.
Unfortunately, Nick's patchset is needed for a stable WLAN connection,
several ReAssoc's etc.
So, I can't give a comment to the effects of the AHB patchset on my AR5212.
But... I have found the culprit patch which makes modinfo no more list
the aliases/pci-id (see [1]):
commit e5b046d86fac609f636d127a38de94a175c7e83b
"ath5k: Move PCI bus functions to separate file."
- Sedat -
[1] http://git.kernel.org/?p=linux/kernel/git/linville/wireless-next-2.6.git;a=commit;h=e5b046d86fac609f636d127a38de94a175c7e83b
$ ~/src/linux-2.6/linux-2.6.37-rc4/debian/build/source_i386_none
$ cat .pc/applied-patches
revert-ath5k-patches/0001-Revert-ath5k-Fix-reset-and-interrupts-for-AHB-type-o.patch
revert-ath5k-patches/0002-Revert-ath5k-Add-AHB-bus-support.patch
revert-ath5k-patches/0003-Revert-ath5k-Add-initial-registers-values-for-radio-.patch
revert-ath5k-patches/0004-Revert-ath5k-Add-a-function-to-read-chipset-s-MAC-re.patch
revert-ath5k-patches/0005-Revert-ath5k-Check-if-pci-pdev-struct-is-initialized.patch
revert-ath5k-patches/0006-Revert-ath5k-Use-generic-eeprom-read-from-common-ath.patch
revert-ath5k-patches/0007-Revert-ath5k-Move-PCI-bus-functions-to-separate-file.patch
# modinfo ath5k
filename:
/lib/modules/2.6.37-rc4-686/kernel/drivers/net/wireless/ath/ath5k/ath5k.ko
version: 0.6.0 (EXPERIMENTAL)
license: Dual BSD/GPL
description: Support for 5xxx series of Atheros 802.11 wireless LAN
cards.
author: Nick Kossifidis
author: Jiri Slaby
srcversion: 666105BAEE881F2C2F10CE6
alias: pci:v0000168Cd0000001Dsv*sd*bc*sc*i*
alias: pci:v0000168Cd0000001Csv*sd*bc*sc*i*
alias: pci:v0000168Cd0000001Bsv*sd*bc*sc*i*
alias: pci:v0000168Cd0000001Asv*sd*bc*sc*i*
alias: pci:v0000168Cd00000019sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000018sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000017sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000016sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000015sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000014sv*sd*bc*sc*i*
alias: pci:v0000168Cd00001014sv*sd*bc*sc*i*
alias: pci:v000010B7d00000013sv*sd*bc*sc*i*
alias: pci:v0000A727d00000013sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000013sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000012sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000011sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000007sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000207sv*sd*bc*sc*i*
depends: mac80211,cfg80211,ath
vermagic: 2.6.37-rc4-686 SMP mod_unload modversions 686
parm: debug:uint
parm: nohwcrypt:Disable hardware encryption. (bool)
parm: all_channels:Expose all channels the device can use. (bool)
From e2f79441224cf9cd1f9e399ca774040f1ece72fa Mon Sep 17 00:00:00 2001
From: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Date: Fri, 3 Dec 2010 23:19:54 +0100
Subject: [PATCH 7/9] Revert "ath5k: Move PCI bus functions to separate file."
This reverts commit e5b046d86fac609f636d127a38de94a175c7e83b.
---
drivers/net/wireless/ath/ath5k/Makefile | 1 -
drivers/net/wireless/ath/ath5k/ath5k.h | 3 -
drivers/net/wireless/ath/ath5k/base.c | 267 +++++++++++++++++++++++++++++-
drivers/net/wireless/ath/ath5k/pci.c | 284 -------------------------------
4 files changed, 266 insertions(+), 289 deletions(-)
delete mode 100644 drivers/net/wireless/ath/ath5k/pci.c
diff --git a/drivers/net/wireless/ath/ath5k/Makefile b/drivers/net/wireless/ath/ath5k/Makefile
index dae881c..2242a14 100644
--- a/drivers/net/wireless/ath/ath5k/Makefile
+++ b/drivers/net/wireless/ath/ath5k/Makefile
@@ -15,5 +15,4 @@ ath5k-y += rfkill.o
ath5k-y += ani.o
ath5k-y += sysfs.o
ath5k-$(CONFIG_ATH5K_DEBUG) += debug.o
-ath5k-y += pci.o
obj-$(CONFIG_ATH5K) += ath5k.o
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index ee3c0af..a74f448 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -1145,7 +1145,6 @@ struct ath5k_hw {
/*
* Prototypes
*/
-extern const struct ieee80211_ops ath5k_hw_ops;
/* Initialization and detach functions */
int ath5k_init_softc(struct ath5k_softc *sc, const struct ath_bus_ops *bus_ops);
@@ -1156,8 +1155,6 @@ void ath5k_hw_deinit(struct ath5k_hw *ah);
int ath5k_sysfs_register(struct ath5k_softc *sc);
void ath5k_sysfs_unregister(struct ath5k_softc *sc);
-/*Chip id helper function */
-const char *ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val);
/* LED functions */
int ath5k_init_leds(struct ath5k_softc *sc);
diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 9fcc4e1..b11ea3d 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -47,6 +47,8 @@
#include <linux/io.h>
#include <linux/netdevice.h>
#include <linux/cache.h>
+#include <linux/pci.h>
+#include <linux/pci-aspm.h>
#include <linux/ethtool.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
@@ -85,6 +87,30 @@ static int ath5k_beacon_update(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
static void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
+/* Known PCI ids */
+static DEFINE_PCI_DEVICE_TABLE(ath5k_pci_id_table) = {
+ { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */
+ { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */
+ { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/
+ { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */
+ { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */
+ { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */
+ { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */
+ { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */
+ { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 combatible */
+ { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */
+ { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */
+ { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */
+ { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */
+ { 0 }
+};
+MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
+
/* Known SREVs */
static const struct ath5k_srev_name srev_names[] = {
{ "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
@@ -167,6 +193,32 @@ static const struct ieee80211_rate ath5k_rates[] = {
/* XR missing */
};
+/* return bus cachesize in 4B word units */
+static void ath5k_pci_read_cachesize(struct ath_common *common, int *csz)
+{
+ struct ath5k_softc *sc = (struct ath5k_softc *) common->priv;
+ u8 u8tmp;
+
+ pci_read_config_byte(sc->pdev, PCI_CACHE_LINE_SIZE, &u8tmp);
+ *csz = (int)u8tmp;
+
+ /*
+ * This check was put in to avoid "unplesant" consequences if
+ * the bootrom has not fully initialized all PCI devices.
+ * Sometimes the cache line size register is not set
+ */
+
+ if (*csz == 0)
+ *csz = L1_CACHE_BYTES >> 2; /* Use the default size */
+}
+
+/* Common ath_bus_opts structure */
+static const struct ath_bus_ops ath_pci_bus_ops = {
+ .ath_bus_type = ATH_PCI,
+ .read_cachesize = ath5k_pci_read_cachesize,
+};
+
+
static inline void ath5k_txbuf_free_skb(struct ath5k_softc *sc,
struct ath5k_buf *bf)
{
@@ -209,7 +261,7 @@ static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
return (tsf & ~0x7fff) | rstamp;
}
-const char *
+static const char *
ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
{
const char *name = "xxxxx";
@@ -3575,3 +3627,216 @@ const struct ieee80211_ops ath5k_hw_ops = {
.set_antenna = ath5k_set_antenna,
.get_antenna = ath5k_get_antenna,
};
+
+/********************\
+* PCI Initialization *
+\********************/
+
+static int __devinit
+ath5k_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ void __iomem *mem;
+ struct ath5k_softc *sc;
+ struct ieee80211_hw *hw;
+ int ret;
+ u8 csz;
+
+ /*
+ * L0s needs to be disabled on all ath5k cards.
+ *
+ * For distributions shipping with CONFIG_PCIEASPM (this will be enabled
+ * by default in the future in 2.6.36) this will also mean both L1 and
+ * L0s will be disabled when a pre 1.1 PCIe device is detected. We do
+ * know L1 works correctly even for all ath5k pre 1.1 PCIe devices
+ * though but cannot currently undue the effect of a blacklist, for
+ * details you can read pcie_aspm_sanity_check() and see how it adjusts
+ * the device link capability.
+ *
+ * It may be possible in the future to implement some PCI API to allow
+ * drivers to override blacklists for pre 1.1 PCIe but for now it is
+ * best to accept that both L0s and L1 will be disabled completely for
+ * distributions shipping with CONFIG_PCIEASPM rather than having this
+ * issue present. Motivation for adding this new API will be to help
+ * with power consumption for some of these devices.
+ */
+ pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "can't enable device\n");
+ goto err;
+ }
+
+ /* XXX 32-bit addressing only */
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(&pdev->dev, "32-bit DMA not available\n");
+ goto err_dis;
+ }
+
+ /*
+ * Cache line size is used to size and align various
+ * structures used to communicate with the hardware.
+ */
+ pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
+ if (csz == 0) {
+ /*
+ * Linux 2.4.18 (at least) writes the cache line size
+ * register as a 16-bit wide register which is wrong.
+ * We must have this setup properly for rx buffer
+ * DMA to work so force a reasonable value here if it
+ * comes up zero.
+ */
+ csz = L1_CACHE_BYTES >> 2;
+ pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
+ }
+ /*
+ * The default setting of latency timer yields poor results,
+ * set it to the value used by other systems. It may be worth
+ * tweaking this setting more.
+ */
+ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
+
+ /* Enable bus mastering */
+ pci_set_master(pdev);
+
+ /*
+ * Disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state.
+ */
+ pci_write_config_byte(pdev, 0x41, 0);
+
+ ret = pci_request_region(pdev, 0, "ath5k");
+ if (ret) {
+ dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
+ goto err_dis;
+ }
+
+ mem = pci_iomap(pdev, 0, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
+ ret = -EIO;
+ goto err_reg;
+ }
+
+ /*
+ * Allocate hw (mac80211 main struct)
+ * and hw->priv (driver private data)
+ */
+ hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
+ if (hw == NULL) {
+ dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
+ ret = -ENOMEM;
+ goto err_map;
+ }
+
+ dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
+
+ sc = hw->priv;
+ sc->hw = hw;
+ sc->pdev = pdev;
+ sc->dev = &pdev->dev;
+ sc->irq = pdev->irq;
+ sc->devid = id->device;
+ sc->iobase = mem; /* So we can unmap it on detach */
+
+ /* Initialize */
+ ret = ath5k_init_softc(sc, &ath_pci_bus_ops);
+ if (ret) {
+ goto err_free;
+ }
+
+ /* Set private data */
+ pci_set_drvdata(pdev, hw);
+
+ return 0;
+err_free:
+ ieee80211_free_hw(hw);
+err_map:
+ pci_iounmap(pdev, mem);
+err_reg:
+ pci_release_region(pdev, 0);
+err_dis:
+ pci_disable_device(pdev);
+err:
+ return ret;
+}
+
+static void __devexit
+ath5k_pci_remove(struct pci_dev *pdev)
+{
+ struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+ struct ath5k_softc *sc = hw->priv;
+
+ ath5k_deinit_softc(sc);
+ pci_iounmap(pdev, sc->iobase);
+ pci_release_region(pdev, 0);
+ pci_disable_device(pdev);
+ ieee80211_free_hw(hw);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ath5k_pci_suspend(struct device *dev)
+{
+ struct ath5k_softc *sc = pci_get_drvdata(to_pci_dev(dev));
+
+ ath5k_led_off(sc);
+ return 0;
+}
+
+static int ath5k_pci_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct ath5k_softc *sc = pci_get_drvdata(pdev);
+
+ /*
+ * Suspend/Resume resets the PCI configuration space, so we have to
+ * re-disable the RETRY_TIMEOUT register (0x41) to keep
+ * PCI Tx retries from interfering with C3 CPU state
+ */
+ pci_write_config_byte(pdev, 0x41, 0);
+
+ ath5k_led_enable(sc);
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
+#define ATH5K_PM_OPS (&ath5k_pm_ops)
+#else
+#define ATH5K_PM_OPS NULL
+#endif /* CONFIG_PM_SLEEP */
+
+static struct pci_driver ath5k_pci_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = ath5k_pci_id_table,
+ .probe = ath5k_pci_probe,
+ .remove = __devexit_p(ath5k_pci_remove),
+ .driver.pm = ATH5K_PM_OPS,
+};
+
+/*
+ * Module init/exit functions
+ */
+static int __init
+init_ath5k_pci(void)
+{
+ int ret;
+
+ ret = pci_register_driver(&ath5k_pci_driver);
+ if (ret) {
+ printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void __exit
+exit_ath5k_pci(void)
+{
+ pci_unregister_driver(&ath5k_pci_driver);
+}
+
+module_init(init_ath5k_pci);
+module_exit(exit_ath5k_pci);
diff --git a/drivers/net/wireless/ath/ath5k/pci.c b/drivers/net/wireless/ath/ath5k/pci.c
deleted file mode 100644
index 9f7d3ca..0000000
--- a/drivers/net/wireless/ath/ath5k/pci.c
+++ /dev/null
@@ -1,284 +0,0 @@
-/*
- * Copyright (c) 2008-2009 Atheros Communications Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <linux/nl80211.h>
-#include <linux/pci.h>
-#include <linux/pci-aspm.h>
-#include "../ath.h"
-#include "ath5k.h"
-#include "debug.h"
-#include "base.h"
-#include "reg.h"
-
-/* Known PCI ids */
-static DEFINE_PCI_DEVICE_TABLE(ath5k_pci_id_table) = {
- { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */
- { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */
- { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/
- { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */
- { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */
- { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */
- { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */
- { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */
- { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 combatible */
- { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */
- { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */
- { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */
- { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */
- { 0 }
-};
-
-/* return bus cachesize in 4B word units */
-static void ath5k_pci_read_cachesize(struct ath_common *common, int *csz)
-{
- struct ath5k_softc *sc = (struct ath5k_softc *) common->priv;
- u8 u8tmp;
-
- pci_read_config_byte(sc->pdev, PCI_CACHE_LINE_SIZE, &u8tmp);
- *csz = (int)u8tmp;
-
- /*
- * This check was put in to avoid "unplesant" consequences if
- * the bootrom has not fully initialized all PCI devices.
- * Sometimes the cache line size register is not set
- */
-
- if (*csz == 0)
- *csz = L1_CACHE_BYTES >> 2; /* Use the default size */
-}
-
-/* Common ath_bus_opts structure */
-static const struct ath_bus_ops ath_pci_bus_ops = {
- .ath_bus_type = ATH_PCI,
- .read_cachesize = ath5k_pci_read_cachesize,
-};
-
-/********************\
-* PCI Initialization *
-\********************/
-
-static int __devinit
-ath5k_pci_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
-{
- void __iomem *mem;
- struct ath5k_softc *sc;
- struct ieee80211_hw *hw;
- int ret;
- u8 csz;
-
- /*
- * L0s needs to be disabled on all ath5k cards.
- *
- * For distributions shipping with CONFIG_PCIEASPM (this will be enabled
- * by default in the future in 2.6.36) this will also mean both L1 and
- * L0s will be disabled when a pre 1.1 PCIe device is detected. We do
- * know L1 works correctly even for all ath5k pre 1.1 PCIe devices
- * though but cannot currently undue the effect of a blacklist, for
- * details you can read pcie_aspm_sanity_check() and see how it adjusts
- * the device link capability.
- *
- * It may be possible in the future to implement some PCI API to allow
- * drivers to override blacklists for pre 1.1 PCIe but for now it is
- * best to accept that both L0s and L1 will be disabled completely for
- * distributions shipping with CONFIG_PCIEASPM rather than having this
- * issue present. Motivation for adding this new API will be to help
- * with power consumption for some of these devices.
- */
- pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
-
- ret = pci_enable_device(pdev);
- if (ret) {
- dev_err(&pdev->dev, "can't enable device\n");
- goto err;
- }
-
- /* XXX 32-bit addressing only */
- ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
- if (ret) {
- dev_err(&pdev->dev, "32-bit DMA not available\n");
- goto err_dis;
- }
-
- /*
- * Cache line size is used to size and align various
- * structures used to communicate with the hardware.
- */
- pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
- if (csz == 0) {
- /*
- * Linux 2.4.18 (at least) writes the cache line size
- * register as a 16-bit wide register which is wrong.
- * We must have this setup properly for rx buffer
- * DMA to work so force a reasonable value here if it
- * comes up zero.
- */
- csz = L1_CACHE_BYTES >> 2;
- pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
- }
- /*
- * The default setting of latency timer yields poor results,
- * set it to the value used by other systems. It may be worth
- * tweaking this setting more.
- */
- pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
-
- /* Enable bus mastering */
- pci_set_master(pdev);
-
- /*
- * Disable the RETRY_TIMEOUT register (0x41) to keep
- * PCI Tx retries from interfering with C3 CPU state.
- */
- pci_write_config_byte(pdev, 0x41, 0);
-
- ret = pci_request_region(pdev, 0, "ath5k");
- if (ret) {
- dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
- goto err_dis;
- }
-
- mem = pci_iomap(pdev, 0, 0);
- if (!mem) {
- dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
- ret = -EIO;
- goto err_reg;
- }
-
- /*
- * Allocate hw (mac80211 main struct)
- * and hw->priv (driver private data)
- */
- hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
- if (hw == NULL) {
- dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
- ret = -ENOMEM;
- goto err_map;
- }
-
- dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
-
- sc = hw->priv;
- sc->hw = hw;
- sc->pdev = pdev;
- sc->dev = &pdev->dev;
- sc->irq = pdev->irq;
- sc->devid = id->device;
- sc->iobase = mem; /* So we can unmap it on detach */
-
- /* Initialize */
- ret = ath5k_init_softc(sc, &ath_pci_bus_ops);
- if (ret)
- goto err_free;
-
- /* Set private data */
- pci_set_drvdata(pdev, hw);
-
- return 0;
-err_free:
- ieee80211_free_hw(hw);
-err_map:
- pci_iounmap(pdev, mem);
-err_reg:
- pci_release_region(pdev, 0);
-err_dis:
- pci_disable_device(pdev);
-err:
- return ret;
-}
-
-static void __devexit
-ath5k_pci_remove(struct pci_dev *pdev)
-{
- struct ieee80211_hw *hw = pci_get_drvdata(pdev);
- struct ath5k_softc *sc = hw->priv;
-
- ath5k_deinit_softc(sc);
- pci_iounmap(pdev, sc->iobase);
- pci_release_region(pdev, 0);
- pci_disable_device(pdev);
- ieee80211_free_hw(hw);
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int ath5k_pci_suspend(struct device *dev)
-{
- struct ath5k_softc *sc = pci_get_drvdata(to_pci_dev(dev));
-
- ath5k_led_off(sc);
- return 0;
-}
-
-static int ath5k_pci_resume(struct device *dev)
-{
- struct pci_dev *pdev = to_pci_dev(dev);
- struct ath5k_softc *sc = pci_get_drvdata(pdev);
-
- /*
- * Suspend/Resume resets the PCI configuration space, so we have to
- * re-disable the RETRY_TIMEOUT register (0x41) to keep
- * PCI Tx retries from interfering with C3 CPU state
- */
- pci_write_config_byte(pdev, 0x41, 0);
-
- ath5k_led_enable(sc);
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
-#define ATH5K_PM_OPS (&ath5k_pm_ops)
-#else
-#define ATH5K_PM_OPS NULL
-#endif /* CONFIG_PM_SLEEP */
-
-static struct pci_driver ath5k_pci_driver = {
- .name = KBUILD_MODNAME,
- .id_table = ath5k_pci_id_table,
- .probe = ath5k_pci_probe,
- .remove = __devexit_p(ath5k_pci_remove),
- .driver.pm = ATH5K_PM_OPS,
-};
-
-/*
- * Module init/exit functions
- */
-static int __init
-init_ath5k_pci(void)
-{
- int ret;
-
- ret = pci_register_driver(&ath5k_pci_driver);
- if (ret) {
- printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
- return ret;
- }
-
- return 0;
-}
-
-static void __exit
-exit_ath5k_pci(void)
-{
- pci_unregister_driver(&ath5k_pci_driver);
-}
-
-module_init(init_ath5k_pci);
-module_exit(exit_ath5k_pci);
--
1.7.2.3
