drivers/net/wireless/rt2x00/rt2x00pci.h

   1 /*
   2         Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00pci
  23         Abstract: Data structures for the rt2x00pci module.
  24  */
  25
  26 #ifndef RT2X00PCI_H
  27 #define RT2X00PCI_H
  28
  29 #include <linux/io.h>
  30
  31 /*
  32  * This variable should be used with the
  33  * pci_driver structure initialization.
  34  */
  35 #define PCI_DEVICE_DATA(__ops)  .driver_data = (kernel_ulong_t)(__ops)
  36
  37 /*
  38  * Register defines.
  39  * Some registers require multiple attempts before success,
  40  * in those cases REGISTER_BUSY_COUNT attempts should be
  41  * taken with a REGISTER_BUSY_DELAY interval.
  42  */
  43 #define REGISTER_BUSY_COUNT     5
  44 #define REGISTER_BUSY_DELAY     100
  45
  46 /*
  47  * Register access.
  48  */
  49 static inline void rt2x00pci_register_read(struct rt2x00_dev *rt2x00dev,
  50                                            const unsigned int offset,
  51                                            u32 *value)
  52 {
  53         *value = readl(rt2x00dev->csr.base + offset);
  54 }
  55
  56 static inline void
  57 rt2x00pci_register_multiread(struct rt2x00_dev *rt2x00dev,
  58                              const unsigned int offset,
  59                              void *value, const u16 length)
  60 {
  61         memcpy_fromio(value, rt2x00dev->csr.base + offset, length);
  62 }
  63
  64 static inline void rt2x00pci_register_write(struct rt2x00_dev *rt2x00dev,
  65                                             const unsigned int offset,
  66                                             u32 value)
  67 {
  68         writel(value, rt2x00dev->csr.base + offset);
  69 }
  70
  71 static inline void
  72 rt2x00pci_register_multiwrite(struct rt2x00_dev *rt2x00dev,
  73                               const unsigned int offset,
  74                               const void *value, const u16 length)
  75 {
  76         memcpy_toio(rt2x00dev->csr.base + offset, value, length);
  77 }
  78
  79 /**
  80  * rt2x00pci_regbusy_read - Read from register with busy check
  81  * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
  82  * @offset: Register offset
  83  * @field: Field to check if register is busy
  84  * @reg: Pointer to where register contents should be stored
  85  *
  86  * This function will read the given register, and checks if the
  87  * register is busy. If it is, it will sleep for a couple of
  88  * microseconds before reading the register again. If the register
  89  * is not read after a certain timeout, this function will return
  90  * FALSE.
  91  */
  92 int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
  93                            const unsigned int offset,
  94                            const struct rt2x00_field32 field,
  95                            u32 *reg);
  96
  97 /**
  98  * rt2x00pci_write_tx_data - Initialize data for TX operation
  99  * @entry: The entry where the frame is located
 100  *
 101  * This function will initialize the DMA and skb descriptor
 102  * to prepare the entry for the actual TX operation.
 103  */
 104 int rt2x00pci_write_tx_data(struct queue_entry *entry);
 105
 106 /**
 107  * struct queue_entry_priv_pci: Per entry PCI specific information
 108  *
 109  * @desc: Pointer to device descriptor
 110  * @desc_dma: DMA pointer to &desc.
 111  * @data: Pointer to device's entry memory.
 112  * @data_dma: DMA pointer to &data.
 113  */
 114 struct queue_entry_priv_pci {
 115         __le32 *desc;
 116         dma_addr_t desc_dma;
 117 };
 118
 119 /**
 120  * rt2x00pci_rxdone - Handle RX done events
 121  * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
 122  */
 123 void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev);
 124
 125 /*
 126  * Device initialization handlers.
 127  */
 128 int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev);
 129 void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev);
 130
 131 /*
 132  * PCI driver handlers.
 133  */
 134 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id);
 135 void rt2x00pci_remove(struct pci_dev *pci_dev);
 136 #ifdef CONFIG_PM
 137 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state);
 138 int rt2x00pci_resume(struct pci_dev *pci_dev);
 139 #else
 140 #define rt2x00pci_suspend       NULL
 141 #define rt2x00pci_resume        NULL
 142 #endif /* CONFIG_PM */
 143
 144 #endif /* RT2X00PCI_H */