kernel/drivers/usb/musb/musbhsdma.h

   1 /*
   2  * MUSB OTG driver - support for Mentor's DMA controller
   3  *
   4  * Copyright 2005 Mentor Graphics Corporation
   5  * Copyright (C) 2005-2007 by Texas Instruments
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  19  * 02110-1301 USA
  20  *
  21  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
  22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  24  * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  27  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  28  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  */
  33
  34 #ifndef CONFIG_BLACKFIN
  35
  36 #define MUSB_HSDMA_BASE         0x200
  37 #define MUSB_HSDMA_INTR         (MUSB_HSDMA_BASE + 0)
  38 #define MUSB_HSDMA_CONTROL              0x4
  39 #define MUSB_HSDMA_ADDRESS              0x8
  40 #define MUSB_HSDMA_COUNT                0xc
  41
  42 #define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset)           \
  43                 (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
  44
  45 #define musb_read_hsdma_addr(mbase, bchannel)   \
  46         musb_readl(mbase,       \
  47                    MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS))
  48
  49 #define musb_write_hsdma_addr(mbase, bchannel, addr) \
  50         musb_writel(mbase, \
  51                     MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \
  52                     addr)
  53
  54 #define musb_read_hsdma_count(mbase, bchannel)  \
  55         musb_readl(mbase,       \
  56                    MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT))
  57
  58 #define musb_write_hsdma_count(mbase, bchannel, len) \
  59         musb_writel(mbase, \
  60                     MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \
  61                     len)
  62 #else
  63
  64 #define MUSB_HSDMA_BASE         0x400
  65 #define MUSB_HSDMA_INTR         (MUSB_HSDMA_BASE + 0)
  66 #define MUSB_HSDMA_CONTROL              0x04
  67 #define MUSB_HSDMA_ADDR_LOW             0x08
  68 #define MUSB_HSDMA_ADDR_HIGH            0x0C
  69 #define MUSB_HSDMA_COUNT_LOW            0x10
  70 #define MUSB_HSDMA_COUNT_HIGH           0x14
  71
  72 #define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset)           \
  73                 (MUSB_HSDMA_BASE + (_bchannel * 0x20) + _offset)
  74
  75 static inline u32 musb_read_hsdma_addr(void __iomem *mbase, u8 bchannel)
  76 {
  77         u32 addr = musb_readw(mbase,
  78                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH));
  79
  80         addr = addr << 16;
  81
  82         addr |= musb_readw(mbase,
  83                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW));
  84
  85         return addr;
  86 }
  87
  88 static inline void musb_write_hsdma_addr(void __iomem *mbase,
  89                                 u8 bchannel, dma_addr_t dma_addr)
  90 {
  91         musb_writew(mbase,
  92                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW),
  93                 dma_addr);
  94         musb_writew(mbase,
  95                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH),
  96                 (dma_addr >> 16));
  97 }
  98
  99 static inline u32 musb_read_hsdma_count(void __iomem *mbase, u8 bchannel)
 100 {
 101         u32 count = musb_readw(mbase,
 102                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH));
 103
 104         count = count << 16;
 105
 106         count |= musb_readw(mbase,
 107                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW));
 108
 109         return count;
 110 }
 111
 112 static inline void musb_write_hsdma_count(void __iomem *mbase,
 113                                 u8 bchannel, u32 len)
 114 {
 115         musb_writew(mbase,
 116                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW),len);
 117         musb_writew(mbase,
 118                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH),
 119                 (len >> 16));
 120 }
 121
 122 #endif /* CONFIG_BLACKFIN */
 123
 124 /* control register (16-bit): */
 125 #define MUSB_HSDMA_ENABLE_SHIFT         0
 126 #define MUSB_HSDMA_TRANSMIT_SHIFT       1
 127 #define MUSB_HSDMA_MODE1_SHIFT          2
 128 #define MUSB_HSDMA_IRQENABLE_SHIFT      3
 129 #define MUSB_HSDMA_ENDPOINT_SHIFT       4
 130 #define MUSB_HSDMA_BUSERROR_SHIFT       8
 131 #define MUSB_HSDMA_BURSTMODE_SHIFT      9
 132 #define MUSB_HSDMA_BURSTMODE            (3 << MUSB_HSDMA_BURSTMODE_SHIFT)
 133 #define MUSB_HSDMA_BURSTMODE_UNSPEC     0
 134 #define MUSB_HSDMA_BURSTMODE_INCR4      1
 135 #define MUSB_HSDMA_BURSTMODE_INCR8      2
 136 #define MUSB_HSDMA_BURSTMODE_INCR16     3
 137
 138 #define MUSB_HSDMA_CHANNELS             8
 139
 140 struct musb_dma_controller;
 141
 142 struct musb_dma_channel {
 143         struct dma_channel              channel;
 144         struct musb_dma_controller      *controller;
 145         u32                             start_addr;
 146         u32                             len;
 147         u16                             max_packet_sz;
 148         u8                              idx;
 149         u8                              epnum;
 150         u8                              transmit;
 151 };
 152
 153 struct musb_dma_controller {
 154         struct dma_controller           controller;
 155         struct musb_dma_channel         channel[MUSB_HSDMA_CHANNELS];
 156         void                            *private_data;
 157         void __iomem                    *base;
 158         u8                              channel_count;
 159         u8                              used_channels;
 160         u8                              irq;
 161 };