e01ae27f8c
Both USB and PCI drivers allow a system administrator to dynamically add
USB/PCI IDs to the device table that a driver supports via the
/sys/bus/{usb,pci,pci_express}/drivers/<driver-name>/new_id files.
However, for the rt2x00 drivers using this method currently crashes the
system with a NULL pointer failure.
This is due to the set-up of rt2x00 where the probe functions require a
rt2x00_ops structure in the driver_info field of the probed device. As
this field is empty for the dynamically added devices this fails for
these devices.
Fix this by introducing driver-specific probe wrappers that do nothing
but calling the bus-specific probe functions with the rt2x00_ops structure
as an argument, rather than depending on the driver_info field.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
139 lines
4 KiB
C
139 lines
4 KiB
C
/*
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Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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<http://rt2x00.serialmonkey.com>
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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 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00pci
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Abstract: Data structures for the rt2x00pci module.
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*/
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#ifndef RT2X00PCI_H
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#define RT2X00PCI_H
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#include <linux/io.h>
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#include <linux/pci.h>
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/*
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* This variable should be used with the
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* pci_driver structure initialization.
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*/
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#define PCI_DEVICE_DATA(__ops) .driver_data = (kernel_ulong_t)(__ops)
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/*
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* Register access.
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*/
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static inline void rt2x00pci_register_read(struct rt2x00_dev *rt2x00dev,
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const unsigned int offset,
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u32 *value)
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{
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*value = readl(rt2x00dev->csr.base + offset);
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}
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static inline void rt2x00pci_register_multiread(struct rt2x00_dev *rt2x00dev,
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const unsigned int offset,
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void *value, const u32 length)
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{
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memcpy_fromio(value, rt2x00dev->csr.base + offset, length);
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}
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static inline void rt2x00pci_register_write(struct rt2x00_dev *rt2x00dev,
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const unsigned int offset,
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u32 value)
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{
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writel(value, rt2x00dev->csr.base + offset);
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}
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static inline void rt2x00pci_register_multiwrite(struct rt2x00_dev *rt2x00dev,
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const unsigned int offset,
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const void *value,
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const u32 length)
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{
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__iowrite32_copy(rt2x00dev->csr.base + offset, value, length >> 2);
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}
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/**
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* rt2x00pci_regbusy_read - Read from register with busy check
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* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
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* @offset: Register offset
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* @field: Field to check if register is busy
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* @reg: Pointer to where register contents should be stored
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*
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* This function will read the given register, and checks if the
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* register is busy. If it is, it will sleep for a couple of
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* microseconds before reading the register again. If the register
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* is not read after a certain timeout, this function will return
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* FALSE.
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*/
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int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
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const unsigned int offset,
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const struct rt2x00_field32 field,
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u32 *reg);
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/**
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* struct queue_entry_priv_pci: Per entry PCI specific information
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*
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* @desc: Pointer to device descriptor
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* @desc_dma: DMA pointer to &desc.
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* @data: Pointer to device's entry memory.
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* @data_dma: DMA pointer to &data.
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*/
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struct queue_entry_priv_pci {
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__le32 *desc;
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dma_addr_t desc_dma;
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};
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/**
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* rt2x00pci_rxdone - Handle RX done events
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* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
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*
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* Returns true if there are still rx frames pending and false if all
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* pending rx frames were processed.
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*/
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bool rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev);
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/**
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* rt2x00pci_flush_queue - Flush data queue
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* @queue: Data queue to stop
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* @drop: True to drop all pending frames.
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*
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* This will wait for a maximum of 100ms, waiting for the queues
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* to become empty.
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*/
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void rt2x00pci_flush_queue(struct data_queue *queue, bool drop);
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/*
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* Device initialization handlers.
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*/
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int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev);
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void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev);
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/*
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* PCI driver handlers.
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*/
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int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops);
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void rt2x00pci_remove(struct pci_dev *pci_dev);
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#ifdef CONFIG_PM
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int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state);
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int rt2x00pci_resume(struct pci_dev *pci_dev);
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#else
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#define rt2x00pci_suspend NULL
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#define rt2x00pci_resume NULL
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#endif /* CONFIG_PM */
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#endif /* RT2X00PCI_H */
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