move danube folder to ifxmips, to allow future integration of the other chips
[openwrt.git] / target / linux / ifxmips / files / include / asm-mips / danube / danube_dma.h
1 /*
2  *   This program is free software; you can redistribute it and/or modify
3  *   it under the terms of the GNU General Public License as published by
4  *   the Free Software Foundation; either version 2 of the License, or
5  *   (at your option) any later version.
6  *
7  *   This program is distributed in the hope that it will be useful,
8  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
9  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10  *   GNU General Public License for more details.
11  *
12  *   You should have received a copy of the GNU General Public License
13  *   along with this program; if not, write to the Free Software
14  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
15  *
16  *   Copyright (C) 2005 infineon
17  *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
18  *
19  */
20 #ifndef _DANUBE_DMA_H__
21 #define _DANUBE_DMA_H__
22
23 #define RCV_INT                                                 1
24 #define TX_BUF_FULL_INT                                 2
25 #define TRANSMIT_CPT_INT                                4
26 #define DANUBE_DMA_CH_ON                                1
27 #define DANUBE_DMA_CH_OFF                               0
28 #define DANUBE_DMA_CH_DEFAULT_WEIGHT    100
29
30 enum attr_t{
31         TX = 0,
32         RX = 1,
33         RESERVED = 2,
34         DEFAULT = 3,
35 };
36
37 #define DMA_OWN                                                 1
38 #define CPU_OWN                                                 0
39 #define DMA_MAJOR                                               250
40
41 #define DMA_DESC_OWN_CPU                                0x0
42 #define DMA_DESC_OWN_DMA                                0x80000000
43 #define DMA_DESC_CPT_SET                                0x40000000
44 #define DMA_DESC_SOP_SET                                0x20000000
45 #define DMA_DESC_EOP_SET                                0x10000000
46
47 #define MISCFG_MASK                                             0x40
48 #define RDERR_MASK                                              0x20
49 #define CHOFF_MASK                                              0x10
50 #define DESCPT_MASK                                             0x8
51 #define DUR_MASK                                                0x4
52 #define EOP_MASK                                                0x2
53
54 #define DMA_DROP_MASK                                   (1<<31)
55
56 #define DANUBE_DMA_RX                                   -1
57 #define DANUBE_DMA_TX                                   1
58
59 typedef struct dma_chan_map {
60         char dev_name[15];
61         enum attr_t dir;
62         int pri;
63         int irq;
64         int rel_chan_no;
65 } _dma_chan_map;
66
67 #ifdef CONFIG_CPU_LITTLE_ENDIAN
68 typedef struct rx_desc{
69         u32 data_length:16;
70         volatile u32 reserved:7;
71         volatile u32 byte_offset:2;
72         volatile u32 Burst_length_offset:3;
73         volatile u32 EoP:1;
74         volatile u32 Res:1;
75         volatile u32 C:1;
76         volatile u32 OWN:1;
77         volatile u32 Data_Pointer;
78         /*fix me:should be 28 bits here, 32 bits just for host simulatiuon purpose*/
79 }_rx_desc;
80
81 typedef struct tx_desc{
82         volatile u32 data_length:16;
83         volatile u32 reserved1:7;
84         volatile u32 byte_offset:5;
85         volatile u32 EoP:1;
86         volatile u32 SoP:1;
87         volatile u32 C:1;
88         volatile u32 OWN:1;
89         volatile u32 Data_Pointer;//fix me:should be 28 bits here
90 }_tx_desc;
91 #else //BIG
92 typedef struct rx_desc{
93         union
94         {
95                 struct
96                 {
97                         volatile u32 OWN:1;
98                         volatile u32 C:1;
99                         volatile u32 SoP:1;
100                         volatile u32 EoP:1;
101                         volatile u32 Burst_length_offset:3;
102                         volatile u32 byte_offset:2;
103                         volatile u32 reserve:7;
104                         volatile u32 data_length:16;
105                 }field;
106                 volatile u32 word;
107         }status;
108         volatile u32 Data_Pointer;
109 }_rx_desc;
110
111 typedef struct tx_desc{
112         union
113         {
114                 struct
115                 {
116                         volatile u32 OWN:1;
117                         volatile u32 C:1;
118                         volatile u32 SoP:1;
119                         volatile u32 EoP:1;
120                         volatile u32 byte_offset:5;
121                         volatile u32 reserved:7;
122                         volatile u32 data_length:16;
123                 }field;
124                 volatile u32 word;
125         }status;
126         volatile u32 Data_Pointer;
127 }_tx_desc;
128 #endif //ENDIAN
129
130 typedef struct dma_channel_info{
131    /*relative channel number*/
132    int rel_chan_no;
133    /*class for this channel for QoS*/
134    int pri;
135    /*specify byte_offset*/
136    int byte_offset;
137    /*direction*/
138    int dir;
139    /*irq number*/
140    int irq;
141    /*descriptor parameter*/
142    int desc_base;
143    int desc_len;
144    int curr_desc;
145    int prev_desc;/*only used if it is a tx channel*/
146    /*weight setting for WFQ algorithm*/
147    int weight;
148    int default_weight;
149    int packet_size;
150    int burst_len;
151    /*on or off of this channel*/
152    int control;
153    /**optional information for the upper layer devices*/
154 #if defined(CONFIG_DANUBE_ETHERNET_D2) || defined(CONFIG_DANUBE_PPA)
155    void* opt[64];
156 #else
157    void* opt[25];
158 #endif
159    /*Pointer to the peripheral device who is using this channel*/
160    void* dma_dev;
161    /*channel operations*/
162    void (*open)(struct dma_channel_info* pCh);
163    void (*close)(struct dma_channel_info* pCh);
164    void (*reset)(struct dma_channel_info* pCh);
165    void (*enable_irq)(struct dma_channel_info* pCh);
166    void (*disable_irq)(struct dma_channel_info* pCh);
167 }_dma_channel_info;
168
169 typedef struct dma_device_info{
170     /*device name of this peripheral*/
171     char device_name[15];
172     int reserved;
173     int tx_burst_len;
174     int rx_burst_len;
175     int default_weight;
176     int  current_tx_chan;
177         int  current_rx_chan;
178     int  num_tx_chan;
179     int  num_rx_chan;
180     int  max_rx_chan_num;
181     int  max_tx_chan_num;
182     _dma_channel_info* tx_chan[20];
183     _dma_channel_info* rx_chan[20];
184     /*functions, optional*/
185     u8* (*buffer_alloc)(int len,int* offset, void** opt);
186     void (*buffer_free)(u8* dataptr, void* opt);
187     int (*intr_handler)(struct dma_device_info* info, int status);
188     void * priv;                /* used by peripheral driver only */
189 }_dma_device_info;
190
191 _dma_device_info* dma_device_reserve(char* dev_name);
192
193 void dma_device_release(_dma_device_info* dev);
194
195 void dma_device_register(_dma_device_info* info);
196
197 void dma_device_unregister(_dma_device_info* info);
198
199 int dma_device_read(struct dma_device_info* info, u8** dataptr, void** opt);
200
201 int dma_device_write(struct dma_device_info* info, u8* dataptr, int len, void* opt);
202 #endif