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ssb: pick PCMCIA host code support from b43 driver

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ssb bus can be found on various "host" devices like PCI/PCMCIA/SDIO.
Every ssb bus contains cores AKA devices.
The main idea is to have ssb driver scan/initialize bus and register
ready-to-use cores. This way ssb drivers can operate on a single core
mostly ignoring underlaying details.

For some reason PCMCIA support was split between ssb and b43. We got
PCMCIA host device probing in b43, then bus scanning in ssb and then
wireless core probing back in b43. The truth is it's very unlikely we
will ever see PCMCIA ssb device with no 802.11 core but I still don't
see any advantage of the current architecture.

With proposed change we get the same functionality with a simpler
architecture, less Kconfig symbols, one killed EXPORT and hopefully
cleaner b43. Since b43 supports both: ssb & bcma I prefer to keep ssb
specific code in ssb driver.

This mostly moves code from b43's pcmcia.c to bridge_pcmcia_80211.c. We
already use similar solution with b43_pci_bridge.c. I didn't use "b43"
in name of this new file as in theory any driver can operate on wireless
core.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Rafał Miłecki 2015-10-15 07:23:25 +02:00 committed by Kalle Valo
parent 0117e78aec
commit 399500da18
9 changed files with 146 additions and 196 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/net/wireless/b43/Kconfig
View File

@ -71,26 +71,6 @@ config B43_PCICORE_AUTOSELECT
select SSB_DRIVER_PCICORE
default y
config B43_PCMCIA
bool "Broadcom 43xx PCMCIA device support"
depends on B43 && B43_SSB && SSB_PCMCIAHOST_POSSIBLE
select SSB_PCMCIAHOST
---help---
Broadcom 43xx PCMCIA device support.
Support for 16bit PCMCIA devices.
Please note that most PC-CARD devices are _NOT_ 16bit PCMCIA
devices, but 32bit CardBUS devices. CardBUS devices are supported
out of the box by b43.
With this config option you can drive b43 cards in
CompactFlash formfactor in a PCMCIA adaptor.
CF b43 cards can sometimes be found in handheld PCs.
It's safe to select Y here, even if you don't have a B43 PCMCIA device.
If unsure, say N.
config B43_SDIO
bool "Broadcom 43xx SDIO device support"
depends on B43 && B43_SSB && SSB_SDIOHOST_POSSIBLE

1
drivers/net/wireless/b43/Makefile
View File

@ -21,7 +21,6 @@ b43-y += pio.o
b43-y += rfkill.o
b43-y += ppr.o
b43-$(CONFIG_B43_LEDS) += leds.o
b43-$(CONFIG_B43_PCMCIA) += pcmcia.o
b43-$(CONFIG_B43_SDIO) += sdio.o
b43-$(CONFIG_B43_DEBUG) += debugfs.o

9
drivers/net/wireless/b43/main.c
View File

@ -56,7 +56,6 @@
#include "sysfs.h"
#include "xmit.h"
#include "lo.h"
#include "pcmcia.h"
#include "sdio.h"
#include <linux/mmc/sdio_func.h>
@ -5850,12 +5849,9 @@ static int __init b43_init(void)
int err;
b43_debugfs_init();
err = b43_pcmcia_init();
if (err)
goto err_dfs_exit;
err = b43_sdio_init();
if (err)
goto err_pcmcia_exit;
goto err_dfs_exit;
#ifdef CONFIG_B43_BCMA
err = bcma_driver_register(&b43_bcma_driver);
if (err)
@ -5878,8 +5874,6 @@ static int __init b43_init(void)
err_sdio_exit:
#endif
b43_sdio_exit();
err_pcmcia_exit:
b43_pcmcia_exit();
err_dfs_exit:
b43_debugfs_exit();
return err;
@ -5894,7 +5888,6 @@ static void __exit b43_exit(void)
bcma_driver_unregister(&b43_bcma_driver);
#endif
b43_sdio_exit();
b43_pcmcia_exit();
b43_debugfs_exit();
}

145
drivers/net/wireless/b43/pcmcia.c
View File

@ -1,145 +0,0 @@
/*
Broadcom B43 wireless driver
Copyright (c) 2007 Michael Buesch <m@bues.ch>
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 of the License, 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, Inc., 51 Franklin Steet, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "pcmcia.h"
#include <linux/ssb/ssb.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>
static const struct pcmcia_device_id b43_pcmcia_tbl[] = {
PCMCIA_DEVICE_MANF_CARD(0x2D0, 0x448),
PCMCIA_DEVICE_MANF_CARD(0x2D0, 0x476),
PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, b43_pcmcia_tbl);
#ifdef CONFIG_PM
static int b43_pcmcia_suspend(struct pcmcia_device *dev)
{
struct ssb_bus *ssb = dev->priv;
return ssb_bus_suspend(ssb);
}
static int b43_pcmcia_resume(struct pcmcia_device *dev)
{
struct ssb_bus *ssb = dev->priv;
return ssb_bus_resume(ssb);
}
#else /* CONFIG_PM */
# define b43_pcmcia_suspend NULL
# define b43_pcmcia_resume NULL
#endif /* CONFIG_PM */
static int b43_pcmcia_probe(struct pcmcia_device *dev)
{
struct ssb_bus *ssb;
int err = -ENOMEM;
int res = 0;
ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
if (!ssb)
goto out_error;
err = -ENODEV;
dev->config_flags |= CONF_ENABLE_IRQ;
dev->resource[2]->flags |= WIN_ENABLE | WIN_DATA_WIDTH_16 |
WIN_USE_WAIT;
dev->resource[2]->start = 0;
dev->resource[2]->end = SSB_CORE_SIZE;
res = pcmcia_request_window(dev, dev->resource[2], 250);
if (res != 0)
goto err_kfree_ssb;
res = pcmcia_map_mem_page(dev, dev->resource[2], 0);
if (res != 0)
goto err_disable;
if (!dev->irq)
goto err_disable;
res = pcmcia_enable_device(dev);
if (res != 0)
goto err_disable;
err = ssb_bus_pcmciabus_register(ssb, dev, dev->resource[2]->start);
if (err)
goto err_disable;
dev->priv = ssb;
return 0;
err_disable:
pcmcia_disable_device(dev);
err_kfree_ssb:
kfree(ssb);
out_error:
printk(KERN_ERR "b43-pcmcia: Initialization failed (%d, %d)\n",
res, err);
return err;
}
static void b43_pcmcia_remove(struct pcmcia_device *dev)
{
struct ssb_bus *ssb = dev->priv;
ssb_bus_unregister(ssb);
pcmcia_disable_device(dev);
kfree(ssb);
dev->priv = NULL;
}
static struct pcmcia_driver b43_pcmcia_driver = {
.owner = THIS_MODULE,
.name = "b43-pcmcia",
.id_table = b43_pcmcia_tbl,
.probe = b43_pcmcia_probe,
.remove = b43_pcmcia_remove,
.suspend = b43_pcmcia_suspend,
.resume = b43_pcmcia_resume,
};
/*
* These are not module init/exit functions!
* The module_pcmcia_driver() helper cannot be used here.
*/
int b43_pcmcia_init(void)
{
return pcmcia_register_driver(&b43_pcmcia_driver);
}
void b43_pcmcia_exit(void)
{
pcmcia_unregister_driver(&b43_pcmcia_driver);
}

20
drivers/net/wireless/b43/pcmcia.h
View File

@ -1,20 +0,0 @@
#ifndef B43_PCMCIA_H_
#define B43_PCMCIA_H_
#ifdef CONFIG_B43_PCMCIA
int b43_pcmcia_init(void);
void b43_pcmcia_exit(void);
#else /* CONFIG_B43_PCMCIA */
static inline int b43_pcmcia_init(void)
{
return 0;
}
static inline void b43_pcmcia_exit(void)
{
}
#endif /* CONFIG_B43_PCMCIA */
#endif /* B43_PCMCIA_H_ */

2
drivers/ssb/Makefile
View File

@ -5,7 +5,7 @@ ssb-$(CONFIG_SSB_SPROM) += sprom.o
# host support
ssb-$(CONFIG_SSB_PCIHOST) += pci.o pcihost_wrapper.o
ssb-$(CONFIG_SSB_PCMCIAHOST) += pcmcia.o
ssb-$(CONFIG_SSB_PCMCIAHOST) += pcmcia.o bridge_pcmcia_80211.o
ssb-$(CONFIG_SSB_SDIOHOST) += sdio.o
# built-in drivers

128
drivers/ssb/bridge_pcmcia_80211.c Normal file
View File

@ -0,0 +1,128 @@
/*
* Broadcom 43xx PCMCIA-SSB bridge module
*
* Copyright (c) 2007 Michael Buesch <m@bues.ch>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/ssb/ssb.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>
#include "ssb_private.h"
static const struct pcmcia_device_id ssb_host_pcmcia_tbl[] = {
PCMCIA_DEVICE_MANF_CARD(0x2D0, 0x448),
PCMCIA_DEVICE_MANF_CARD(0x2D0, 0x476),
PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, ssb_host_pcmcia_tbl);
static int ssb_host_pcmcia_probe(struct pcmcia_device *dev)
{
struct ssb_bus *ssb;
int err = -ENOMEM;
int res = 0;
ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
if (!ssb)
goto out_error;
err = -ENODEV;
dev->config_flags |= CONF_ENABLE_IRQ;
dev->resource[2]->flags |= WIN_ENABLE | WIN_DATA_WIDTH_16 |
WIN_USE_WAIT;
dev->resource[2]->start = 0;
dev->resource[2]->end = SSB_CORE_SIZE;
res = pcmcia_request_window(dev, dev->resource[2], 250);
if (res != 0)
goto err_kfree_ssb;
res = pcmcia_map_mem_page(dev, dev->resource[2], 0);
if (res != 0)
goto err_disable;
if (!dev->irq)
goto err_disable;
res = pcmcia_enable_device(dev);
if (res != 0)
goto err_disable;
err = ssb_bus_pcmciabus_register(ssb, dev, dev->resource[2]->start);
if (err)
goto err_disable;
dev->priv = ssb;
return 0;
err_disable:
pcmcia_disable_device(dev);
err_kfree_ssb:
kfree(ssb);
out_error:
ssb_err("Initialization failed (%d, %d)\n", res, err);
return err;
}
static void ssb_host_pcmcia_remove(struct pcmcia_device *dev)
{
struct ssb_bus *ssb = dev->priv;
ssb_bus_unregister(ssb);
pcmcia_disable_device(dev);
kfree(ssb);
dev->priv = NULL;
}
#ifdef CONFIG_PM
static int ssb_host_pcmcia_suspend(struct pcmcia_device *dev)
{
struct ssb_bus *ssb = dev->priv;
return ssb_bus_suspend(ssb);
}
static int ssb_host_pcmcia_resume(struct pcmcia_device *dev)
{
struct ssb_bus *ssb = dev->priv;
return ssb_bus_resume(ssb);
}
#else /* CONFIG_PM */
# define ssb_host_pcmcia_suspend NULL
# define ssb_host_pcmcia_resume NULL
#endif /* CONFIG_PM */
static struct pcmcia_driver ssb_host_pcmcia_driver = {
.owner = THIS_MODULE,
.name = "ssb-pcmcia",
.id_table = ssb_host_pcmcia_tbl,
.probe = ssb_host_pcmcia_probe,
.remove = ssb_host_pcmcia_remove,
.suspend = ssb_host_pcmcia_suspend,
.resume = ssb_host_pcmcia_resume,
};
/*
* These are not module init/exit functions!
* The module_pcmcia_driver() helper cannot be used here.
*/
int ssb_host_pcmcia_init(void)
{
return pcmcia_register_driver(&ssb_host_pcmcia_driver);
}
void ssb_host_pcmcia_exit(void)
{
pcmcia_unregister_driver(&ssb_host_pcmcia_driver);
}

8
drivers/ssb/main.c
View File

@ -897,7 +897,6 @@ int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
return err;
}
EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
#endif /* CONFIG_SSB_PCMCIAHOST */
#ifdef CONFIG_SSB_SDIOHOST
@ -1464,6 +1463,12 @@ static int __init ssb_modinit(void)
/* don't fail SSB init because of this */
err = 0;
}
err = ssb_host_pcmcia_init();
if (err) {
ssb_err("PCMCIA host initialization failed\n");
/* don't fail SSB init because of this */
err = 0;
}
err = ssb_gige_init();
if (err) {
ssb_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n");
@ -1481,6 +1486,7 @@ fs_initcall(ssb_modinit);
static void __exit ssb_modexit(void)
{
ssb_gige_exit();
ssb_host_pcmcia_exit();
b43_pci_ssb_bridge_exit();
bus_unregister(&ssb_bustype);
}

9
drivers/ssb/ssb_private.h
View File

@ -94,6 +94,8 @@ extern int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
extern int ssb_pcmcia_hardware_setup(struct ssb_bus *bus);
extern void ssb_pcmcia_exit(struct ssb_bus *bus);
extern int ssb_pcmcia_init(struct ssb_bus *bus);
extern int ssb_host_pcmcia_init(void);
extern void ssb_host_pcmcia_exit(void);
extern const struct ssb_bus_ops ssb_pcmcia_ops;
#else /* CONFIG_SSB_PCMCIAHOST */
static inline int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
@ -117,6 +119,13 @@ static inline int ssb_pcmcia_init(struct ssb_bus *bus)
{
return 0;
}
static inline int ssb_host_pcmcia_init(void)
{
return 0;
}
static inline void ssb_host_pcmcia_exit(void)
{
}
#endif /* CONFIG_SSB_PCMCIAHOST */
/* sdio.c */