Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
[linux-2.6] / 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 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430)
35 #include "omap2430.h"
36 #endif
37
38 #ifndef CONFIG_BLACKFIN
39
40 #define MUSB_HSDMA_BASE         0x200
41 #define MUSB_HSDMA_INTR         (MUSB_HSDMA_BASE + 0)
42 #define MUSB_HSDMA_CONTROL              0x4
43 #define MUSB_HSDMA_ADDRESS              0x8
44 #define MUSB_HSDMA_COUNT                0xc
45
46 #define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset)           \
47                 (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
48
49 #define musb_read_hsdma_addr(mbase, bchannel)   \
50         musb_readl(mbase,       \
51                    MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS))
52
53 #define musb_write_hsdma_addr(mbase, bchannel, addr) \
54         musb_writel(mbase, \
55                     MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \
56                     addr)
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                 ((u16)((u32) dma_addr & 0xFFFF)));
94         musb_writew(mbase,
95                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH),
96                 ((u16)(((u32) dma_addr >> 16) & 0xFFFF)));
97 }
98
99 static inline void musb_write_hsdma_count(void __iomem *mbase,
100                                 u8 bchannel, u32 len)
101 {
102         musb_writew(mbase,
103                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW),
104                 ((u16)((u32) len & 0xFFFF)));
105         musb_writew(mbase,
106                 MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH),
107                 ((u16)(((u32) len >> 16) & 0xFFFF)));
108 }
109
110 #endif /* CONFIG_BLACKFIN */
111
112 /* control register (16-bit): */
113 #define MUSB_HSDMA_ENABLE_SHIFT         0
114 #define MUSB_HSDMA_TRANSMIT_SHIFT       1
115 #define MUSB_HSDMA_MODE1_SHIFT          2
116 #define MUSB_HSDMA_IRQENABLE_SHIFT      3
117 #define MUSB_HSDMA_ENDPOINT_SHIFT       4
118 #define MUSB_HSDMA_BUSERROR_SHIFT       8
119 #define MUSB_HSDMA_BURSTMODE_SHIFT      9
120 #define MUSB_HSDMA_BURSTMODE            (3 << MUSB_HSDMA_BURSTMODE_SHIFT)
121 #define MUSB_HSDMA_BURSTMODE_UNSPEC     0
122 #define MUSB_HSDMA_BURSTMODE_INCR4      1
123 #define MUSB_HSDMA_BURSTMODE_INCR8      2
124 #define MUSB_HSDMA_BURSTMODE_INCR16     3
125
126 #define MUSB_HSDMA_CHANNELS             8
127
128 struct musb_dma_controller;
129
130 struct musb_dma_channel {
131         struct dma_channel              channel;
132         struct musb_dma_controller      *controller;
133         u32                             start_addr;
134         u32                             len;
135         u16                             max_packet_sz;
136         u8                              idx;
137         u8                              epnum;
138         u8                              transmit;
139 };
140
141 struct musb_dma_controller {
142         struct dma_controller           controller;
143         struct musb_dma_channel         channel[MUSB_HSDMA_CHANNELS];
144         void                            *private_data;
145         void __iomem                    *base;
146         u8                              channel_count;
147         u8                              used_channels;
148         u8                              irq;
149 };