/include/linux/mmc/core.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t · C Header · 195 lines · 122 code · 34 blank · 39 comment · 0 complexity · 0316ab5be99a1a99a0528f240c283508 MD5 · raw file

  1. /*
  2. * linux/include/linux/mmc/core.h
  3. *
  4. * This program is free software; you can redistribute it and/or modify
  5. * it under the terms of the GNU General Public License version 2 as
  6. * published by the Free Software Foundation.
  7. */
  8. #ifndef LINUX_MMC_CORE_H
  9. #define LINUX_MMC_CORE_H
  10. #include <linux/interrupt.h>
  11. #include <linux/device.h>
  12. #define MMC_SLOW_WRITE_TIME 500000 /* time (us) */
  13. #define MMC_REFRESH_INTERVAL 60 /* time (s) */
  14. #define MMC_BKOPS_INTERVAL 20 /* time (s) */
  15. struct request;
  16. struct mmc_data;
  17. struct mmc_request;
  18. struct mmc_command {
  19. u32 opcode;
  20. u32 arg;
  21. u32 resp[4];
  22. unsigned int flags; /* expected response type */
  23. #define MMC_RSP_PRESENT (1 << 0)
  24. #define MMC_RSP_136 (1 << 1) /* 136 bit response */
  25. #define MMC_RSP_CRC (1 << 2) /* expect valid crc */
  26. #define MMC_RSP_BUSY (1 << 3) /* card may send busy */
  27. #define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
  28. #define MMC_CMD_MASK (3 << 5) /* non-SPI command type */
  29. #define MMC_CMD_AC (0 << 5)
  30. #define MMC_CMD_ADTC (1 << 5)
  31. #define MMC_CMD_BC (2 << 5)
  32. #define MMC_CMD_BCR (3 << 5)
  33. #define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */
  34. #define MMC_RSP_SPI_S2 (1 << 8) /* second byte */
  35. #define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */
  36. #define MMC_RSP_SPI_BUSY (1 << 10) /* card may send busy */
  37. /*
  38. * These are the native response types, and correspond to valid bit
  39. * patterns of the above flags. One additional valid pattern
  40. * is all zeros, which means we don't expect a response.
  41. */
  42. #define MMC_RSP_NONE (0)
  43. #define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  44. #define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
  45. #define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
  46. #define MMC_RSP_R3 (MMC_RSP_PRESENT)
  47. #define MMC_RSP_R4 (MMC_RSP_PRESENT)
  48. #define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  49. #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  50. #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  51. #define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
  52. /*
  53. * These are the SPI response types for MMC, SD, and SDIO cards.
  54. * Commands return R1, with maybe more info. Zero is an error type;
  55. * callers must always provide the appropriate MMC_RSP_SPI_Rx flags.
  56. */
  57. #define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1)
  58. #define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY)
  59. #define MMC_RSP_SPI_R2 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
  60. #define MMC_RSP_SPI_R3 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  61. #define MMC_RSP_SPI_R4 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  62. #define MMC_RSP_SPI_R5 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
  63. #define MMC_RSP_SPI_R7 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  64. #define mmc_spi_resp_type(cmd) ((cmd)->flags & \
  65. (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4))
  66. /*
  67. * These are the command types.
  68. */
  69. #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK)
  70. unsigned int retries; /* max number of retries */
  71. unsigned int error; /* command error */
  72. /*
  73. * Standard errno values are used for errors, but some have specific
  74. * meaning in the MMC layer:
  75. *
  76. * ETIMEDOUT Card took too long to respond
  77. * EILSEQ Basic format problem with the received or sent data
  78. * (e.g. CRC check failed, incorrect opcode in response
  79. * or bad end bit)
  80. * EINVAL Request cannot be performed because of restrictions
  81. * in hardware and/or the driver
  82. * ENOMEDIUM Host can determine that the slot is empty and is
  83. * actively failing requests
  84. */
  85. unsigned int cmd_timeout_ms; /* in milliseconds */
  86. struct mmc_data *data; /* data segment associated with cmd */
  87. struct mmc_request *mrq; /* associated request */
  88. };
  89. struct mmc_data {
  90. unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
  91. unsigned int timeout_clks; /* data timeout (in clocks) */
  92. unsigned int blksz; /* data block size */
  93. unsigned int blocks; /* number of blocks */
  94. unsigned int error; /* data error */
  95. unsigned int flags;
  96. #define MMC_DATA_WRITE (1 << 8)
  97. #define MMC_DATA_READ (1 << 9)
  98. #define MMC_DATA_STREAM (1 << 10)
  99. unsigned int bytes_xfered;
  100. struct mmc_command *stop; /* stop command */
  101. struct mmc_request *mrq; /* associated request */
  102. unsigned int sg_len; /* size of scatter list */
  103. struct scatterlist *sg; /* I/O scatter list */
  104. s32 host_cookie; /* host private data */
  105. };
  106. struct mmc_request {
  107. struct mmc_command *sbc; /* SET_BLOCK_COUNT for multiblock */
  108. struct mmc_command *cmd;
  109. struct mmc_data *data;
  110. struct mmc_command *stop;
  111. struct completion completion;
  112. void (*done)(struct mmc_request *);/* completion function */
  113. };
  114. struct mmc_host;
  115. struct mmc_card;
  116. struct mmc_async_req;
  117. extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
  118. struct mmc_async_req *, int *);
  119. extern int mmc_interrupt_hpi(struct mmc_card *);
  120. extern int mmc_bkops_start(struct mmc_card *card, bool is_synchronous);
  121. extern void mmc_refresh(unsigned long data);
  122. extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
  123. extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
  124. extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
  125. extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
  126. struct mmc_command *, int);
  127. extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
  128. #define MMC_ERASE_ARG 0x00000000
  129. #define MMC_SECURE_ERASE_ARG 0x80000000
  130. #define MMC_TRIM_ARG 0x00000001
  131. #define MMC_SECURE_TRIM1_ARG 0x80000001
  132. #define MMC_SECURE_TRIM2_ARG 0x80008000
  133. #define MMC_SECURE_ARGS 0x80000000
  134. #define MMC_TRIM_ARGS 0x00008001
  135. extern int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
  136. unsigned int arg);
  137. extern int mmc_can_erase(struct mmc_card *card);
  138. extern int mmc_can_trim(struct mmc_card *card);
  139. extern int mmc_can_secure_erase_trim(struct mmc_card *card);
  140. extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
  141. unsigned int nr);
  142. extern unsigned int mmc_calc_max_discard(struct mmc_card *card);
  143. extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
  144. extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *);
  145. extern unsigned int mmc_align_data_size(struct mmc_card *, unsigned int);
  146. extern int __mmc_claim_host(struct mmc_host *host, atomic_t *abort);
  147. extern void mmc_release_host(struct mmc_host *host);
  148. extern void mmc_do_release_host(struct mmc_host *host);
  149. extern int mmc_try_claim_host(struct mmc_host *host);
  150. /**
  151. * mmc_claim_host - exclusively claim a host
  152. * @host: mmc host to claim
  153. *
  154. * Claim a host for a set of operations.
  155. */
  156. static inline void mmc_claim_host(struct mmc_host *host)
  157. {
  158. __mmc_claim_host(host, NULL);
  159. }
  160. extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
  161. #endif /* LINUX_MMC_CORE_H */