From 7051227d2e68ad67078b9e7afb15ad5826161686 Mon Sep 17 00:00:00 2001 From: Juergen Beisert Date: Fri, 8 Oct 2010 18:30:53 +0200 Subject: Add MCI card support to barebox This adds the basic framework to handle MCI cards in barebox. Signed-off-by: Juergen Beisert Signed-off-by: Sascha Hauer --- include/mci.h | 239 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 include/mci.h (limited to 'include/mci.h') diff --git a/include/mci.h b/include/mci.h new file mode 100644 index 0000000000..8c669ca0af --- /dev/null +++ b/include/mci.h @@ -0,0 +1,239 @@ +/* + * (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_ */ -- cgit v1.2.3