/* * (C) Copyright 2010 Juergen Beisert, Pengutronix * * This code is partially based on u-boot code: * * Copyright 2008, Freescale Semiconductor, Inc * Andy Fleming * * Based (loosely) on the Linux code * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #ifndef _MCI_H_ #define _MCI_H_ #include /* Firmware revisions for SD cards */ #define SD_VERSION_SD 0x20000 #define SD_VERSION_2 (SD_VERSION_SD | 0x20) #define SD_VERSION_1_0 (SD_VERSION_SD | 0x10) #define SD_VERSION_1_10 (SD_VERSION_SD | 0x1a) /* Firmware revisions for MMC cards */ #define MMC_VERSION_MMC 0x10000 #define MMC_VERSION_UNKNOWN (MMC_VERSION_MMC) #define MMC_VERSION_1_2 (MMC_VERSION_MMC | 0x12) #define MMC_VERSION_1_4 (MMC_VERSION_MMC | 0x14) #define MMC_VERSION_2_2 (MMC_VERSION_MMC | 0x22) #define MMC_VERSION_3 (MMC_VERSION_MMC | 0x30) #define MMC_VERSION_4 (MMC_VERSION_MMC | 0x40) #define MMC_MODE_HS 0x001 #define MMC_MODE_HS_52MHz 0x010 #define MMC_MODE_4BIT 0x100 #define MMC_MODE_8BIT 0x200 #define SD_DATA_4BIT 0x00040000 #define IS_SD(x) (x->version & SD_VERSION_SD) #define MMC_DATA_READ 1 #define MMC_DATA_WRITE 2 /* command list */ #define MMC_CMD_GO_IDLE_STATE 0 #define MMC_CMD_SEND_OP_COND 1 #define MMC_CMD_ALL_SEND_CID 2 #define MMC_CMD_SET_RELATIVE_ADDR 3 #define MMC_CMD_SET_DSR 4 #define MMC_CMD_SWITCH 6 #define MMC_CMD_SELECT_CARD 7 #define MMC_CMD_SEND_EXT_CSD 8 #define MMC_CMD_SEND_CSD 9 #define MMC_CMD_SEND_CID 10 #define MMC_CMD_STOP_TRANSMISSION 12 #define MMC_CMD_SEND_STATUS 13 #define MMC_CMD_SET_BLOCKLEN 16 #define MMC_CMD_READ_SINGLE_BLOCK 17 #define MMC_CMD_READ_MULTIPLE_BLOCK 18 #define MMC_CMD_WRITE_SINGLE_BLOCK 24 #define MMC_CMD_WRITE_MULTIPLE_BLOCK 25 #define MMC_CMD_APP_CMD 55 #define SD_CMD_SEND_RELATIVE_ADDR 3 #define SD_CMD_SWITCH_FUNC 6 #define SD_CMD_SEND_IF_COND 8 #define SD_CMD_APP_SET_BUS_WIDTH 6 #define SD_CMD_APP_SEND_OP_COND 41 #define SD_CMD_APP_SEND_SCR 51 /* SCR definitions in different words */ #define SD_HIGHSPEED_BUSY 0x00020000 #define SD_HIGHSPEED_SUPPORTED 0x00020000 #define MMC_HS_TIMING 0x00000100 #define MMC_HS_52MHZ 0x2 #define OCR_BUSY 0x80000000 /** card's response in its OCR if it is a high capacity card */ #define OCR_HCS 0x40000000 #define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */ #define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */ #define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */ #define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */ #define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */ #define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */ #define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */ #define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */ #define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */ #define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */ #define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */ #define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */ #define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */ #define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */ #define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */ #define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */ #define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */ #define MMC_SWITCH_MODE_CMD_SET 0x00 /** Change the command set */ /** Set bits in EXT_CSD byte addressed by index which are 1 in value field */ #define MMC_SWITCH_MODE_SET_BITS 0x01 /** Clear bits in EXT_CSD byte addressed by index, which are 1 in value field */ #define MMC_SWITCH_MODE_CLEAR_BITS 0x02 /** Set target byte to value */ #define MMC_SWITCH_MODE_WRITE_BYTE 0x03 #define SD_SWITCH_CHECK 0 #define SD_SWITCH_SWITCH 1 /* * EXT_CSD fields */ #define EXT_CSD_BUS_WIDTH 183 /* R/W */ #define EXT_CSD_HS_TIMING 185 /* R/W */ #define EXT_CSD_CARD_TYPE 196 /* RO */ #define EXT_CSD_REV 192 /* RO */ #define EXT_CSD_SEC_CNT 212 /* RO, 4 bytes */ /* * EXT_CSD field definitions */ #define EXT_CSD_CMD_SET_NORMAL (1<<0) #define EXT_CSD_CMD_SET_SECURE (1<<1) #define EXT_CSD_CMD_SET_CPSECURE (1<<2) #define EXT_CSD_CARD_TYPE_26 (1<<0) /* Card can run at 26MHz */ #define EXT_CSD_CARD_TYPE_52 (1<<1) /* Card can run at 52MHz */ #define EXT_CSD_BUS_WIDTH_1 0 /* Card is in 1 bit mode */ #define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */ #define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */ #define R1_ILLEGAL_COMMAND (1 << 22) #define R1_APP_CMD (1 << 5) /* response types */ #define MMC_RSP_PRESENT (1 << 0) #define MMC_RSP_136 (1 << 1) /* 136 bit response */ #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_RSP_NONE (0) #define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R1b (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY) #define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC) #define MMC_RSP_R3 (MMC_RSP_PRESENT) #define MMC_RSP_R4 (MMC_RSP_PRESENT) #define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) /** command information to be sent to the SD/MMC card */ struct mci_cmd { unsigned cmdidx; /**< Command to be sent to the SD/MMC card */ unsigned resp_type; /**< Type of expected response, refer MMC_RSP_* macros */ unsigned cmdarg; /**< Command's arguments */ unsigned response[4]; /**< card's response */ }; /** data information to be used with some SD/MMC commands */ struct mci_data { union { uint8_t *dest; const uint8_t *src; /**< src buffers don't get written to */ }; unsigned flags; /**< refer MMC_DATA_* to define direction */ unsigned blocks; /**< block count to handle in this command */ unsigned blocksize; /**< block size in bytes (mostly 512) */ }; /** host information */ struct mci_host { struct device_d *hw_dev; /**< the host MCI hardware device */ unsigned voltages; unsigned host_caps; /**< Host's interface capabilities, refer MMC_VDD_* */ unsigned f_min; /**< host interface lower limit */ unsigned f_max; /**< host interface upper limit */ unsigned clock; /**< Current clock used to talk to the card */ unsigned bus_width; /**< used data bus width to the card */ /** init the host interface */ int (*init)(struct mci_host*, struct device_d*); /** change host interface settings */ void (*set_ios)(struct mci_host*, struct device_d*, unsigned, unsigned); /** handle a command */ int (*send_cmd)(struct mci_host*, struct mci_cmd*, struct mci_data*); }; /** MMC/SD and interface instance information */ struct mci { unsigned version; /** != 0 when a high capacity card is connected (OCR -> OCR_HCS) */ int high_capacity; unsigned card_caps; /**< Card's capabilities */ unsigned ocr; /**< card's "operation condition register" */ unsigned scr[2]; unsigned csd[4]; /**< card's "card specific data register" */ unsigned cid[4]; /**< card's "card identification register" */ unsigned short rca; /* FIXME */ unsigned tran_speed; /**< not yet used */ /** currently used data block length for read accesses */ unsigned read_bl_len; /** currently used data block length for write accesses */ unsigned write_bl_len; uint64_t capacity; /**< Card's data capacity in bytes */ int ready_for_use; /** true if already probed */ }; int mci_register(struct mci_host*); #define GET_HOST_DATA(x) (x->priv) #define GET_HOST_PDATA(x) (x->platform_data) #define GET_MCI_DATA(x) (x->priv) #define GET_MCI_PDATA(x) (x->platform_data) #endif /* _MCI_H_ */