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fifo.h
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1 /*
2  * Renesas USB driver
3  *
4  * Copyright (C) 2011 Renesas Solutions Corp.
5  * Kuninori Morimoto <[email protected]>
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15  *
16  */
17 #ifndef RENESAS_USB_FIFO_H
18 #define RENESAS_USB_FIFO_H
19 
20 #include <linux/interrupt.h>
21 #include <linux/sh_dma.h>
22 #include <linux/workqueue.h>
23 #include <asm/dma.h>
24 #include "pipe.h"
25 
26 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
27 
28 struct usbhs_fifo {
29  char *name;
30  u32 port; /* xFIFO */
31  u32 sel; /* xFIFOSEL */
32  u32 ctr; /* xFIFOCTR */
33 
34  struct usbhs_pipe *pipe;
35 
36  struct dma_chan *tx_chan;
37  struct dma_chan *rx_chan;
38 
39  struct sh_dmae_slave tx_slave;
40  struct sh_dmae_slave rx_slave;
41 };
42 
43 struct usbhs_fifo_info {
44  struct usbhs_fifo cfifo;
45  struct usbhs_fifo d0fifo;
46  struct usbhs_fifo d1fifo;
47 };
48 
49 struct usbhs_pkt_handle;
50 struct usbhs_pkt {
51  struct list_head node;
52  struct usbhs_pipe *pipe;
53  struct usbhs_pkt_handle *handler;
54  void (*done)(struct usbhs_priv *priv,
55  struct usbhs_pkt *pkt);
56  struct work_struct work;
57  dma_addr_t dma;
58  void *buf;
59  int length;
60  int trans;
61  int actual;
62  int zero;
63  int sequence;
64 };
65 
66 struct usbhs_pkt_handle {
67  int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
68  int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
69  int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
70 };
71 
72 /*
73  * fifo
74  */
75 int usbhs_fifo_probe(struct usbhs_priv *priv);
76 void usbhs_fifo_remove(struct usbhs_priv *priv);
77 void usbhs_fifo_init(struct usbhs_priv *priv);
78 void usbhs_fifo_quit(struct usbhs_priv *priv);
79 
80 /*
81  * packet info
82  */
83 extern struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
84 extern struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
85 extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
86 
87 extern struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
88 extern struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
89 
90 extern struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler;
91 extern struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler;
92 
93 extern struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler;
94 extern struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler;
95 
96 void usbhs_pkt_init(struct usbhs_pkt *pkt);
97 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
98  void (*done)(struct usbhs_priv *priv,
99  struct usbhs_pkt *pkt),
100  void *buf, int len, int zero, int sequence);
101 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
102 void usbhs_pkt_start(struct usbhs_pipe *pipe);
103 
104 #endif /* RENESAS_USB_FIFO_H */
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