1 /* linux/include/asm-arm/arch-msm/dma.h
2  *
3  * Copyright (C) 2007 Google, Inc.
4  *
5  * This software is licensed under the terms of the GNU General Public
6  * License version 2, as published by the Free Software Foundation, and
7  * may be copied, distributed, and modified under those terms.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  */
15 
16 #ifndef __ASM_ARCH_MSM_DMA_H
17 
18 #include <linux/list.h>
19 #include <mach/msm_iomap.h>
20 
21 struct msm_dmov_errdata {
22 	uint32_t flush[6];
23 };
24 
25 struct msm_dmov_cmd {
26 	struct list_head list;
27 	unsigned int cmdptr;
28 	void (*complete_func)(struct msm_dmov_cmd *cmd,
29 			      unsigned int result,
30 			      struct msm_dmov_errdata *err);
31 	void (*execute_func)(struct msm_dmov_cmd *cmd);
32 	void *data;
33 };
34 
35 #ifndef CONFIG_ARCH_MSM8X60
36 void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd);
37 void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful);
38 int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr);
39 #else
40 static inline
msm_dmov_enqueue_cmd(unsigned id,struct msm_dmov_cmd * cmd)41 void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd) { }
42 static inline
msm_dmov_stop_cmd(unsigned id,struct msm_dmov_cmd * cmd,int graceful)43 void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful) { }
44 static inline
msm_dmov_exec_cmd(unsigned id,unsigned int cmdptr)45 int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr) { return -EIO; }
46 #endif
47 
48 
49 #define DMOV_SD0(off, ch) (MSM_DMOV_BASE + 0x0000 + (off) + ((ch) << 2))
50 #define DMOV_SD1(off, ch) (MSM_DMOV_BASE + 0x0400 + (off) + ((ch) << 2))
51 #define DMOV_SD2(off, ch) (MSM_DMOV_BASE + 0x0800 + (off) + ((ch) << 2))
52 #define DMOV_SD3(off, ch) (MSM_DMOV_BASE + 0x0C00 + (off) + ((ch) << 2))
53 
54 #if defined(CONFIG_ARCH_MSM7X30)
55 #define DMOV_SD_AARM DMOV_SD2
56 #else
57 #define DMOV_SD_AARM DMOV_SD3
58 #endif
59 
60 #define DMOV_CMD_PTR(ch)      DMOV_SD_AARM(0x000, ch)
61 #define DMOV_CMD_LIST         (0 << 29) /* does not work */
62 #define DMOV_CMD_PTR_LIST     (1 << 29) /* works */
63 #define DMOV_CMD_INPUT_CFG    (2 << 29) /* untested */
64 #define DMOV_CMD_OUTPUT_CFG   (3 << 29) /* untested */
65 #define DMOV_CMD_ADDR(addr)   ((addr) >> 3)
66 
67 #define DMOV_RSLT(ch)         DMOV_SD_AARM(0x040, ch)
68 #define DMOV_RSLT_VALID       (1 << 31) /* 0 == host has empties result fifo */
69 #define DMOV_RSLT_ERROR       (1 << 3)
70 #define DMOV_RSLT_FLUSH       (1 << 2)
71 #define DMOV_RSLT_DONE        (1 << 1)  /* top pointer done */
72 #define DMOV_RSLT_USER        (1 << 0)  /* command with FR force result */
73 
74 #define DMOV_FLUSH0(ch)       DMOV_SD_AARM(0x080, ch)
75 #define DMOV_FLUSH1(ch)       DMOV_SD_AARM(0x0C0, ch)
76 #define DMOV_FLUSH2(ch)       DMOV_SD_AARM(0x100, ch)
77 #define DMOV_FLUSH3(ch)       DMOV_SD_AARM(0x140, ch)
78 #define DMOV_FLUSH4(ch)       DMOV_SD_AARM(0x180, ch)
79 #define DMOV_FLUSH5(ch)       DMOV_SD_AARM(0x1C0, ch)
80 
81 #define DMOV_STATUS(ch)       DMOV_SD_AARM(0x200, ch)
82 #define DMOV_STATUS_RSLT_COUNT(n)    (((n) >> 29))
83 #define DMOV_STATUS_CMD_COUNT(n)     (((n) >> 27) & 3)
84 #define DMOV_STATUS_RSLT_VALID       (1 << 1)
85 #define DMOV_STATUS_CMD_PTR_RDY      (1 << 0)
86 
87 #define DMOV_ISR              DMOV_SD_AARM(0x380, 0)
88 
89 #define DMOV_CONFIG(ch)       DMOV_SD_AARM(0x300, ch)
90 #define DMOV_CONFIG_FORCE_TOP_PTR_RSLT (1 << 2)
91 #define DMOV_CONFIG_FORCE_FLUSH_RSLT   (1 << 1)
92 #define DMOV_CONFIG_IRQ_EN             (1 << 0)
93 
94 /* channel assignments */
95 
96 #define DMOV_NAND_CHAN        7
97 #define DMOV_NAND_CRCI_CMD    5
98 #define DMOV_NAND_CRCI_DATA   4
99 
100 #define DMOV_SDC1_CHAN        8
101 #define DMOV_SDC1_CRCI        6
102 
103 #define DMOV_SDC2_CHAN        8
104 #define DMOV_SDC2_CRCI        7
105 
106 #define DMOV_TSIF_CHAN        10
107 #define DMOV_TSIF_CRCI        10
108 
109 #define DMOV_USB_CHAN         11
110 
111 /* no client rate control ifc (eg, ram) */
112 #define DMOV_NONE_CRCI        0
113 
114 
115 /* If the CMD_PTR register has CMD_PTR_LIST selected, the data mover
116  * is going to walk a list of 32bit pointers as described below.  Each
117  * pointer points to a *array* of dmov_s, etc structs.  The last pointer
118  * in the list is marked with CMD_PTR_LP.  The last struct in each array
119  * is marked with CMD_LC (see below).
120  */
121 #define CMD_PTR_ADDR(addr)  ((addr) >> 3)
122 #define CMD_PTR_LP          (1 << 31) /* last pointer */
123 #define CMD_PTR_PT          (3 << 29) /* ? */
124 
125 /* Single Item Mode */
126 typedef struct {
127 	unsigned cmd;
128 	unsigned src;
129 	unsigned dst;
130 	unsigned len;
131 } dmov_s;
132 
133 /* Scatter/Gather Mode */
134 typedef struct {
135 	unsigned cmd;
136 	unsigned src_dscr;
137 	unsigned dst_dscr;
138 	unsigned _reserved;
139 } dmov_sg;
140 
141 /* Box mode */
142 typedef struct {
143 	uint32_t cmd;
144 	uint32_t src_row_addr;
145 	uint32_t dst_row_addr;
146 	uint32_t src_dst_len;
147 	uint32_t num_rows;
148 	uint32_t row_offset;
149 } dmov_box;
150 
151 /* bits for the cmd field of the above structures */
152 
153 #define CMD_LC      (1 << 31)  /* last command */
154 #define CMD_FR      (1 << 22)  /* force result -- does not work? */
155 #define CMD_OCU     (1 << 21)  /* other channel unblock */
156 #define CMD_OCB     (1 << 20)  /* other channel block */
157 #define CMD_TCB     (1 << 19)  /* ? */
158 #define CMD_DAH     (1 << 18)  /* destination address hold -- does not work?*/
159 #define CMD_SAH     (1 << 17)  /* source address hold -- does not work? */
160 
161 #define CMD_MODE_SINGLE     (0 << 0) /* dmov_s structure used */
162 #define CMD_MODE_SG         (1 << 0) /* untested */
163 #define CMD_MODE_IND_SG     (2 << 0) /* untested */
164 #define CMD_MODE_BOX        (3 << 0) /* untested */
165 
166 #define CMD_DST_SWAP_BYTES  (1 << 14) /* exchange each byte n with byte n+1 */
167 #define CMD_DST_SWAP_SHORTS (1 << 15) /* exchange each short n with short n+1 */
168 #define CMD_DST_SWAP_WORDS  (1 << 16) /* exchange each word n with word n+1 */
169 
170 #define CMD_SRC_SWAP_BYTES  (1 << 11) /* exchange each byte n with byte n+1 */
171 #define CMD_SRC_SWAP_SHORTS (1 << 12) /* exchange each short n with short n+1 */
172 #define CMD_SRC_SWAP_WORDS  (1 << 13) /* exchange each word n with word n+1 */
173 
174 #define CMD_DST_CRCI(n)     (((n) & 15) << 7)
175 #define CMD_SRC_CRCI(n)     (((n) & 15) << 3)
176 
177 #endif
178