Add MCI card support to barebox
This adds the basic framework to handle MCI cards in barebox. Signed-off-by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Juergen Beisert
Sascha Hauer
parent
63690cc406
commit
7051227d2e
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@ -9,6 +9,7 @@ source "drivers/mtd/Kconfig"
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source "drivers/ata/Kconfig"
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source "drivers/usb/Kconfig"
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source "drivers/video/Kconfig"
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source "drivers/mci/Kconfig"
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source "drivers/clk/Kconfig"
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endmenu
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@ -6,5 +6,6 @@ obj-y += usb/
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obj-$(CONFIG_ATA) += ata/
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obj-$(CONFIG_SPI) += spi/
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obj-$(CONFIG_I2C) += i2c/
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obj-$(CONFIG_MCI) += mci/
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obj-$(CONFIG_VIDEO) += video/
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obj-y += clk/
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@ -0,0 +1,30 @@
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menuconfig MCI
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bool "MCI drivers "
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select ATA
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select ATA_DISK
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help
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Add support for MCI drivers, used to handle MMC and SD cards
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if MCI
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comment "--- Feature list ---"
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config MCI_STARTUP
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bool "Probe on system start"
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help
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Say 'y' here if the MCI framework should probe for attached MCI cards
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on system start up. This is required if the card carries barebox's
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environment (for example on systems where the MCI card is the sole
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bootmedia). Otherwise probing run on demand with "mci*.probe=1"
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config MCI_INFO
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bool "MCI Info"
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depends on CMD_DEVINFO
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default y
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help
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This entry adds more info about the attached MCI card, when the
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'devinfo' command is used on the mci device.
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comment "--- MCI host drivers ---"
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endif
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@ -0,0 +1 @@
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obj-$(CONFIG_MCI) += mci-core.o
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,239 @@
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/*
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* (C) Copyright 2010 Juergen Beisert, Pengutronix
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*
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* This code is partially based on u-boot code:
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*
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* Copyright 2008, Freescale Semiconductor, Inc
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* Andy Fleming
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*
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* Based (loosely) on the Linux code
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _MCI_H_
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#define _MCI_H_
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#include <linux/list.h>
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/* Firmware revisions for SD cards */
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#define SD_VERSION_SD 0x20000
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#define SD_VERSION_2 (SD_VERSION_SD | 0x20)
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#define SD_VERSION_1_0 (SD_VERSION_SD | 0x10)
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#define SD_VERSION_1_10 (SD_VERSION_SD | 0x1a)
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/* Firmware revisions for MMC cards */
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#define MMC_VERSION_MMC 0x10000
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#define MMC_VERSION_UNKNOWN (MMC_VERSION_MMC)
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#define MMC_VERSION_1_2 (MMC_VERSION_MMC | 0x12)
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#define MMC_VERSION_1_4 (MMC_VERSION_MMC | 0x14)
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#define MMC_VERSION_2_2 (MMC_VERSION_MMC | 0x22)
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#define MMC_VERSION_3 (MMC_VERSION_MMC | 0x30)
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#define MMC_VERSION_4 (MMC_VERSION_MMC | 0x40)
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#define MMC_MODE_HS 0x001
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#define MMC_MODE_HS_52MHz 0x010
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#define MMC_MODE_4BIT 0x100
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#define MMC_MODE_8BIT 0x200
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#define SD_DATA_4BIT 0x00040000
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#define IS_SD(x) (x->version & SD_VERSION_SD)
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#define MMC_DATA_READ 1
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#define MMC_DATA_WRITE 2
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/* command list */
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#define MMC_CMD_GO_IDLE_STATE 0
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#define MMC_CMD_SEND_OP_COND 1
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#define MMC_CMD_ALL_SEND_CID 2
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#define MMC_CMD_SET_RELATIVE_ADDR 3
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#define MMC_CMD_SET_DSR 4
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#define MMC_CMD_SWITCH 6
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#define MMC_CMD_SELECT_CARD 7
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#define MMC_CMD_SEND_EXT_CSD 8
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#define MMC_CMD_SEND_CSD 9
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#define MMC_CMD_SEND_CID 10
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#define MMC_CMD_STOP_TRANSMISSION 12
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#define MMC_CMD_SEND_STATUS 13
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#define MMC_CMD_SET_BLOCKLEN 16
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#define MMC_CMD_READ_SINGLE_BLOCK 17
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#define MMC_CMD_READ_MULTIPLE_BLOCK 18
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#define MMC_CMD_WRITE_SINGLE_BLOCK 24
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#define MMC_CMD_WRITE_MULTIPLE_BLOCK 25
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#define MMC_CMD_APP_CMD 55
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#define SD_CMD_SEND_RELATIVE_ADDR 3
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#define SD_CMD_SWITCH_FUNC 6
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#define SD_CMD_SEND_IF_COND 8
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#define SD_CMD_APP_SET_BUS_WIDTH 6
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#define SD_CMD_APP_SEND_OP_COND 41
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#define SD_CMD_APP_SEND_SCR 51
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/* SCR definitions in different words */
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#define SD_HIGHSPEED_BUSY 0x00020000
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#define SD_HIGHSPEED_SUPPORTED 0x00020000
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#define MMC_HS_TIMING 0x00000100
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#define MMC_HS_52MHZ 0x2
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#define OCR_BUSY 0x80000000
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/** card's response in its OCR if it is a high capacity card */
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#define OCR_HCS 0x40000000
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#define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
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#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
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#define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */
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#define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */
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#define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */
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#define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */
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#define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */
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#define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */
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#define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */
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#define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */
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#define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */
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#define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */
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#define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */
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#define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */
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#define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */
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#define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */
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#define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
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#define MMC_SWITCH_MODE_CMD_SET 0x00 /** Change the command set */
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/** Set bits in EXT_CSD byte addressed by index which are 1 in value field */
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#define MMC_SWITCH_MODE_SET_BITS 0x01
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/** Clear bits in EXT_CSD byte addressed by index, which are 1 in value field */
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#define MMC_SWITCH_MODE_CLEAR_BITS 0x02
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/** Set target byte to value */
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#define MMC_SWITCH_MODE_WRITE_BYTE 0x03
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#define SD_SWITCH_CHECK 0
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#define SD_SWITCH_SWITCH 1
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/*
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* EXT_CSD fields
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*/
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#define EXT_CSD_BUS_WIDTH 183 /* R/W */
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#define EXT_CSD_HS_TIMING 185 /* R/W */
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#define EXT_CSD_CARD_TYPE 196 /* RO */
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#define EXT_CSD_REV 192 /* RO */
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#define EXT_CSD_SEC_CNT 212 /* RO, 4 bytes */
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/*
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* EXT_CSD field definitions
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*/
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#define EXT_CSD_CMD_SET_NORMAL (1<<0)
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#define EXT_CSD_CMD_SET_SECURE (1<<1)
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#define EXT_CSD_CMD_SET_CPSECURE (1<<2)
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#define EXT_CSD_CARD_TYPE_26 (1<<0) /* Card can run at 26MHz */
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#define EXT_CSD_CARD_TYPE_52 (1<<1) /* Card can run at 52MHz */
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#define EXT_CSD_BUS_WIDTH_1 0 /* Card is in 1 bit mode */
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#define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */
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#define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */
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#define R1_ILLEGAL_COMMAND (1 << 22)
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#define R1_APP_CMD (1 << 5)
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/* response types */
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#define MMC_RSP_PRESENT (1 << 0)
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#define MMC_RSP_136 (1 << 1) /* 136 bit response */
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#define MMC_RSP_CRC (1 << 2) /* expect valid crc */
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#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
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#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
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#define MMC_RSP_NONE (0)
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#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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#define MMC_RSP_R1b (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
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#define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
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#define MMC_RSP_R3 (MMC_RSP_PRESENT)
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#define MMC_RSP_R4 (MMC_RSP_PRESENT)
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#define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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#define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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/** command information to be sent to the SD/MMC card */
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struct mci_cmd {
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unsigned cmdidx; /**< Command to be sent to the SD/MMC card */
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unsigned resp_type; /**< Type of expected response, refer MMC_RSP_* macros */
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unsigned cmdarg; /**< Command's arguments */
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unsigned response[4]; /**< card's response */
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};
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/** data information to be used with some SD/MMC commands */
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struct mci_data {
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union {
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uint8_t *dest;
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const uint8_t *src; /**< src buffers don't get written to */
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};
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unsigned flags; /**< refer MMC_DATA_* to define direction */
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unsigned blocks; /**< block count to handle in this command */
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unsigned blocksize; /**< block size in bytes (mostly 512) */
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};
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/** host information */
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struct mci_host {
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struct device_d *hw_dev; /**< the host MCI hardware device */
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unsigned voltages;
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unsigned host_caps; /**< Host's interface capabilities, refer MMC_VDD_* */
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unsigned f_min; /**< host interface lower limit */
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unsigned f_max; /**< host interface upper limit */
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unsigned clock; /**< Current clock used to talk to the card */
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unsigned bus_width; /**< used data bus width to the card */
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/** init the host interface */
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int (*init)(struct mci_host*, struct device_d*);
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/** change host interface settings */
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void (*set_ios)(struct mci_host*, struct device_d*, unsigned, unsigned);
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/** handle a command */
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int (*send_cmd)(struct mci_host*, struct mci_cmd*, struct mci_data*);
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};
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/** MMC/SD and interface instance information */
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struct mci {
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unsigned version;
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/** != 0 when a high capacity card is connected (OCR -> OCR_HCS) */
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int high_capacity;
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unsigned card_caps; /**< Card's capabilities */
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unsigned ocr; /**< card's "operation condition register" */
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unsigned scr[2];
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unsigned csd[4]; /**< card's "card specific data register" */
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unsigned cid[4]; /**< card's "card identification register" */
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unsigned short rca; /* FIXME */
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unsigned tran_speed; /**< not yet used */
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/** currently used data block length for read accesses */
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unsigned read_bl_len;
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/** currently used data block length for write accesses */
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unsigned write_bl_len;
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uint64_t capacity; /**< Card's data capacity in bytes */
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int ready_for_use; /** true if already probed */
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};
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int mci_register(struct mci_host*);
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#define GET_HOST_DATA(x) (x->priv)
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#define GET_HOST_PDATA(x) (x->platform_data)
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#define GET_MCI_DATA(x) (x->priv)
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#define GET_MCI_PDATA(x) (x->platform_data)
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#endif /* _MCI_H_ */
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