From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brownell Subject: [patch 2.6.22-git5 1/4] MMC headers learn about SPI Date: Sat, 14 Jul 2007 15:05:59 -0700 Message-ID: <200707141506.00262.david-b@pacbell.net> References: <200707141504.51950.david-b@pacbell.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Anton Vorontsov , Hans-Peter Nilsson , Mikael Starvik , Mike Lavender , Pierre Ossman To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: In-Reply-To: <200707141504.51950.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org Teach the MMC/SD/SDIO system headers that some hosts use SPI mode - New host capabilities and status bits * MMC_CAP_SPI, with mmc_host_is_spi() test * mmc_host.use_spi-crc flag - SPI-specific declarations: * Response types, MMC_RSP_SPI_R* * Two SPI-only commands * Status bits used native to SPI: R1_SPI_*, R2_SPI_* - Fix a few (unrelated) whitespace bugs in the headers. - Reorder a few mmc_host fields, removing several bytes of padding None of these changes affect current code. Signed-off-by: David Brownell --- include/linux/mmc/core.h | 23 ++++++++++++++++++++-- include/linux/mmc/host.h | 9 ++++++-- include/linux/mmc/mmc.h | 48 ++++++++++++++++++++++++++++++++++++++++------- 3 files changed, 69 insertions(+), 11 deletions(-) --- g26.orig/include/linux/mmc/host.h 2007-07-14 14:47:13.000000000 -0700 +++ g26/include/linux/mmc/host.h 2007-07-14 14:47:51.000000000 -0700 @@ -90,6 +90,7 @@ struct mmc_host { #define MMC_CAP_BYTEBLOCK (1 << 2) /* Can do non-log2 block sizes */ #define MMC_CAP_MMC_HIGHSPEED (1 << 3) /* Can do MMC high-speed timing */ #define MMC_CAP_SD_HIGHSPEED (1 << 4) /* Can do SD high-speed timing */ +#define MMC_CAP_SPI (1 << 5) /* Talks only SPI protocols */ /* host specific block data */ unsigned int max_seg_size; /* see blk_queue_max_segment_size */ @@ -115,14 +116,16 @@ struct mmc_host { wait_queue_head_t wq; unsigned int claimed:1; /* host exclusively claimed */ - struct delayed_work detect; + unsigned int use_spi_crc:1; + #ifdef CONFIG_MMC_DEBUG unsigned int removed:1; /* host is being removed */ #endif + unsigned int bus_dead:1; /* bus has been released */ + struct delayed_work detect; const struct mmc_bus_ops *bus_ops; /* current bus driver */ unsigned int bus_refs; /* reference counter */ - unsigned int bus_dead:1; /* bus has been released */ unsigned long private[0] ____cacheline_aligned; }; @@ -137,6 +140,8 @@ static inline void *mmc_priv(struct mmc_ return (void *)host->private; } +#define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI) + #define mmc_dev(x) ((x)->parent) #define mmc_classdev(x) (&(x)->class_dev) #define mmc_hostname(x) ((x)->class_dev.bus_id) --- g26.orig/include/linux/mmc/core.h 2007-07-14 14:47:13.000000000 -0700 +++ g26/include/linux/mmc/core.h 2007-07-14 14:47:51.000000000 -0700 @@ -25,14 +25,19 @@ struct mmc_command { #define MMC_RSP_CRC (1 << 2) /* expect valid crc */ #define MMC_RSP_BUSY (1 << 3) /* card may send busy */ #define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */ -#define MMC_CMD_MASK (3 << 5) /* command type */ + +#define MMC_CMD_MASK (3 << 5) /* non-SPI command type */ #define MMC_CMD_AC (0 << 5) #define MMC_CMD_ADTC (1 << 5) #define MMC_CMD_BC (2 << 5) #define MMC_CMD_BCR (3 << 5) +#define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */ +#define MMC_RSP_SPI_S2 (1 << 8) /* second status byte */ +#define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */ + /* - * These are the response types, and correspond to valid bit + * These are the native response types, and correspond to valid bit * patterns of the above flags. One additional valid pattern * is all zeros, which means we don't expect a response. */ @@ -47,6 +52,20 @@ struct mmc_command { #define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE)) /* + * These are the SPI response types for MMC and SD cards (not SDIO). + * Commands return R1, with maybe more info. Zero is an error type; + * callers must always provide the appropriate MMC_RSP_SPI_Rx flags. + */ +#define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1) +#define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_BUSY) +#define MMC_RSP_SPI_R2 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2) +#define MMC_RSP_SPI_R3 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) +#define MMC_RSP_SPI_R7 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) + +#define mmc_spi_resp_type(cmd) ((cmd)->flags & \ + (MMC_RSP_SPI_S1|MMC_RSP_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4)) + +/* * These are the command types. */ #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK) --- g26.orig/include/linux/mmc/mmc.h 2007-07-14 14:47:12.000000000 -0700 +++ g26/include/linux/mmc/mmc.h 2007-07-14 14:47:51.000000000 -0700 @@ -27,7 +27,7 @@ /* Standard MMC commands (4.1) type argument response */ /* class 1 */ -#define MMC_GO_IDLE_STATE 0 /* bc */ +#define MMC_GO_IDLE_STATE 0 /* bc */ #define MMC_SEND_OP_COND 1 /* bcr [31:0] OCR R3 */ #define MMC_ALL_SEND_CID 2 /* bcr R2 */ #define MMC_SET_RELATIVE_ADDR 3 /* ac [31:16] RCA R1 */ @@ -39,8 +39,10 @@ #define MMC_SEND_CID 10 /* ac [31:16] RCA R2 */ #define MMC_READ_DAT_UNTIL_STOP 11 /* adtc [31:0] dadr R1 */ #define MMC_STOP_TRANSMISSION 12 /* ac R1b */ -#define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */ +#define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */ #define MMC_GO_INACTIVE_STATE 15 /* ac [31:16] RCA */ +#define MMC_SPI_READ_OCR 58 /* spi spi_R3 */ +#define MMC_SPI_CRC_ON_OFF 59 /* spi [0:0] flag spi_R1 */ /* class 2 */ #define MMC_SET_BLOCKLEN 16 /* ac [31:0] block len R1 */ @@ -90,15 +92,15 @@ */ /* - MMC status in R1 + MMC status in R1, for native mode (SPI bits are different) Type - e : error bit + e : error bit s : status bit r : detected and set for the actual command response x : detected and set during command execution. the host must poll the card by sending status command in order to read these bits. Clear condition - a : according to the card state + a : according to the card state b : always related to the previous command. Reception of a valid command will clear it (with a delay of one command) c : clear by read @@ -124,10 +126,42 @@ #define R1_CARD_ECC_DISABLED (1 << 14) /* sx, a */ #define R1_ERASE_RESET (1 << 13) /* sr, c */ #define R1_STATUS(x) (x & 0xFFFFE000) -#define R1_CURRENT_STATE(x) ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */ +#define R1_CURRENT_STATE(x) ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */ #define R1_READY_FOR_DATA (1 << 8) /* sx, a */ #define R1_APP_CMD (1 << 5) /* sr, c */ +/* + * MMC/SD in SPI mode reports R1 status always, and R2 for SEND_STATUS + * R1 is the low order byte; R2 is the next highest byte, when present. + */ +#define R1_SPI_IDLE (1 << 0) +#define R1_SPI_ERASE_RESET (1 << 1) +#define R1_SPI_ILLEGAL_COMMAND (1 << 2) +#define R1_SPI_COM_CRC (1 << 3) +#define R1_SPI_ERASE_SEQ (1 << 4) +#define R1_SPI_ADDRESS (1 << 5) +#define R1_SPI_PARAMETER (1 << 6) +/* R1 bit 7 is always zero */ +#define R2_SPI_CARD_LOCKED (1 << 8) +#define R2_SPI_WP_ERASE_SKIP (1 << 9) /* or lock/unlock fail */ +#define R2_SPI_LOCK_UNLOCK_FAIL R2_SPI_WP_ERASE_SKIP +#define R2_SPI_ERROR (1 << 10) +#define R2_SPI_CC_ERROR (1 << 11) +#define R2_SPI_CARD_ECC_ERROR (1 << 12) +#define R2_SPI_WP_VIOLATION (1 << 13) +#define R2_SPI_ERASE_PARAM (1 << 14) +#define R2_SPI_OUT_OF_RANGE (1 << 15) /* or CSD overwrite */ +#define R2_SPI_CSD_OVERWRITE R2_SPI_OUT_OF_RANGE + +static inline int mmc_status_card_is_locked(struct mmc_host *host, u32 status) +{ + if (mmc_host_is_spi(host)) + return status & R2_SPI_CARD_LOCKED; + else + return status & R1_CARD_IS_LOCKED; +} + + /* These are unpacked versions of the actual responses */ struct _mmc_csd { @@ -182,6 +216,7 @@ struct _mmc_csd { */ #define CCC_BASIC (1<<0) /* (0) Basic protocol functions */ /* (CMD0,1,2,3,4,7,9,10,12,13,15) */ + /* (and for SPI, CMD58,59) */ #define CCC_STREAM_READ (1<<1) /* (1) Stream read commands */ /* (CMD11) */ #define CCC_BLOCK_READ (1<<2) /* (2) Block read commands */ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. 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