arch/arm/mach-msm/include/mach/dma.h

   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
  20 struct msm_dmov_errdata {
  21         uint32_t flush[6];
  22 };
  23
  24 struct msm_dmov_cmd {
  25         struct list_head list;
  26         unsigned int cmdptr;
  27         void (*complete_func)(struct msm_dmov_cmd *cmd,
  28                               unsigned int result,
  29                               struct msm_dmov_errdata *err);
  30         void (*execute_func)(struct msm_dmov_cmd *cmd);
  31         void *data;
  32 };
  33
  34 #ifndef CONFIG_ARCH_MSM8X60
  35 void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd);
  36 void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful);
  37 int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr);
  38 #else
  39 static inline
  40 void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd) { }
  41 static inline
  42 void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd, int graceful) { }
  43 static inline
  44 int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr) { return -EIO; }
  45 #endif
  46
  47 #define DMOV_CMD_LIST         (0 << 29) /* does not work */
  48 #define DMOV_CMD_PTR_LIST     (1 << 29) /* works */
  49 #define DMOV_CMD_INPUT_CFG    (2 << 29) /* untested */
  50 #define DMOV_CMD_OUTPUT_CFG   (3 << 29) /* untested */
  51 #define DMOV_CMD_ADDR(addr)   ((addr) >> 3)
  52
  53 #define DMOV_RSLT_VALID       (1 << 31) /* 0 == host has empties result fifo */
  54 #define DMOV_RSLT_ERROR       (1 << 3)
  55 #define DMOV_RSLT_FLUSH       (1 << 2)
  56 #define DMOV_RSLT_DONE        (1 << 1)  /* top pointer done */
  57 #define DMOV_RSLT_USER        (1 << 0)  /* command with FR force result */
  58
  59 #define DMOV_STATUS_RSLT_COUNT(n)    (((n) >> 29))
  60 #define DMOV_STATUS_CMD_COUNT(n)     (((n) >> 27) & 3)
  61 #define DMOV_STATUS_RSLT_VALID       (1 << 1)
  62 #define DMOV_STATUS_CMD_PTR_RDY      (1 << 0)
  63
  64 #define DMOV_CONFIG_FORCE_TOP_PTR_RSLT (1 << 2)
  65 #define DMOV_CONFIG_FORCE_FLUSH_RSLT   (1 << 1)
  66 #define DMOV_CONFIG_IRQ_EN             (1 << 0)
  67
  68 /* channel assignments */
  69
  70 #define DMOV_NAND_CHAN        7
  71 #define DMOV_NAND_CRCI_CMD    5
  72 #define DMOV_NAND_CRCI_DATA   4
  73
  74 #define DMOV_SDC1_CHAN        8
  75 #define DMOV_SDC1_CRCI        6
  76
  77 #define DMOV_SDC2_CHAN        8
  78 #define DMOV_SDC2_CRCI        7
  79
  80 #define DMOV_TSIF_CHAN        10
  81 #define DMOV_TSIF_CRCI        10
  82
  83 #define DMOV_USB_CHAN         11
  84
  85 /* no client rate control ifc (eg, ram) */
  86 #define DMOV_NONE_CRCI        0
  87
  88
  89 /* If the CMD_PTR register has CMD_PTR_LIST selected, the data mover
  90  * is going to walk a list of 32bit pointers as described below.  Each
  91  * pointer points to a *array* of dmov_s, etc structs.  The last pointer
  92  * in the list is marked with CMD_PTR_LP.  The last struct in each array
  93  * is marked with CMD_LC (see below).
  94  */
  95 #define CMD_PTR_ADDR(addr)  ((addr) >> 3)
  96 #define CMD_PTR_LP          (1 << 31) /* last pointer */
  97 #define CMD_PTR_PT          (3 << 29) /* ? */
  98
  99 /* Single Item Mode */
 100 typedef struct {
 101         unsigned cmd;
 102         unsigned src;
 103         unsigned dst;
 104         unsigned len;
 105 } dmov_s;
 106
 107 /* Scatter/Gather Mode */
 108 typedef struct {
 109         unsigned cmd;
 110         unsigned src_dscr;
 111         unsigned dst_dscr;
 112         unsigned _reserved;
 113 } dmov_sg;
 114
 115 /* Box mode */
 116 typedef struct {
 117         uint32_t cmd;
 118         uint32_t src_row_addr;
 119         uint32_t dst_row_addr;
 120         uint32_t src_dst_len;
 121         uint32_t num_rows;
 122         uint32_t row_offset;
 123 } dmov_box;
 124
 125 /* bits for the cmd field of the above structures */
 126
 127 #define CMD_LC      (1 << 31)  /* last command */
 128 #define CMD_FR      (1 << 22)  /* force result -- does not work? */
 129 #define CMD_OCU     (1 << 21)  /* other channel unblock */
 130 #define CMD_OCB     (1 << 20)  /* other channel block */
 131 #define CMD_TCB     (1 << 19)  /* ? */
 132 #define CMD_DAH     (1 << 18)  /* destination address hold -- does not work?*/
 133 #define CMD_SAH     (1 << 17)  /* source address hold -- does not work? */
 134
 135 #define CMD_MODE_SINGLE     (0 << 0) /* dmov_s structure used */
 136 #define CMD_MODE_SG         (1 << 0) /* untested */
 137 #define CMD_MODE_IND_SG     (2 << 0) /* untested */
 138 #define CMD_MODE_BOX        (3 << 0) /* untested */
 139
 140 #define CMD_DST_SWAP_BYTES  (1 << 14) /* exchange each byte n with byte n+1 */
 141 #define CMD_DST_SWAP_SHORTS (1 << 15) /* exchange each short n with short n+1 */
 142 #define CMD_DST_SWAP_WORDS  (1 << 16) /* exchange each word n with word n+1 */
 143
 144 #define CMD_SRC_SWAP_BYTES  (1 << 11) /* exchange each byte n with byte n+1 */
 145 #define CMD_SRC_SWAP_SHORTS (1 << 12) /* exchange each short n with short n+1 */
 146 #define CMD_SRC_SWAP_WORDS  (1 << 13) /* exchange each word n with word n+1 */
 147
 148 #define CMD_DST_CRCI(n)     (((n) & 15) << 7)
 149 #define CMD_SRC_CRCI(n)     (((n) & 15) << 3)
 150
 151 #endif