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freebsd-dev/sys/dev/sdhci/sdhci.h
Ian Lepore e64f01a94a Add timeout logic to sdhci, separate from the timeouts done by the hardware. 
If the hardware is not in a good state (like maybe clocks aren't running
because of a configuration glitch) its timeout clock may also not work
correctly, and the next command sent will hang that thread forever.  The
thread in question is usually the one and only thread (at init time) or
a bio queue worker thread whose lockup will eventually lead to the whole
system locking up when it runs out of buffers.

No sd card command should take longer than 250ms.  This new code establishes
a 1-second timeout to allow plenty of safety margin over that.
2014-02-15 20:45:53 +00:00

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/*-
* Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef __SDHCI_H__
#define __SDHCI_H__
#define DMA_BLOCK_SIZE 4096
#define DMA_BOUNDARY 0 /* DMA reload every 4K */
/* Controller doesn't honor resets unless we touch the clock register */
#define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
/* Controller really supports DMA */
#define SDHCI_QUIRK_FORCE_DMA (1<<1)
/* Controller has unusable DMA engine */
#define SDHCI_QUIRK_BROKEN_DMA (1<<2)
/* Controller doesn't like to be reset when there is no card inserted. */
#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<3)
/* Controller has flaky internal state so reset it on each ios change */
#define SDHCI_QUIRK_RESET_ON_IOS (1<<4)
/* Controller can only DMA chunk sizes that are a multiple of 32 bits */
#define SDHCI_QUIRK_32BIT_DMA_SIZE (1<<5)
/* Controller needs to be reset after each request to stay stable */
#define SDHCI_QUIRK_RESET_AFTER_REQUEST (1<<6)
/* Controller has an off-by-one issue with timeout value */
#define SDHCI_QUIRK_INCR_TIMEOUT_CONTROL (1<<7)
/* Controller has broken read timings */
#define SDHCI_QUIRK_BROKEN_TIMINGS (1<<8)
/* Controller needs lowered frequency */
#define SDHCI_QUIRK_LOWER_FREQUENCY (1<<9)
/* Data timeout is invalid, should use SD clock */
#define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK (1<<10)
/* Timeout value is invalid, should be overriden */
#define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<11)
/* SDHCI_CAPABILITIES is invalid */
#define SDHCI_QUIRK_MISSING_CAPS (1<<12)
/* Hardware shifts the 136-bit response, don't do it in software. */
#define SDHCI_QUIRK_DONT_SHIFT_RESPONSE (1<<13)
/*
* Controller registers
*/
#define SDHCI_DMA_ADDRESS 0x00
#define SDHCI_BLOCK_SIZE 0x04
#define SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))
#define SDHCI_BLOCK_COUNT 0x06
#define SDHCI_ARGUMENT 0x08
#define SDHCI_TRANSFER_MODE 0x0C
#define SDHCI_TRNS_DMA 0x01
#define SDHCI_TRNS_BLK_CNT_EN 0x02
#define SDHCI_TRNS_ACMD12 0x04
#define SDHCI_TRNS_READ 0x10
#define SDHCI_TRNS_MULTI 0x20
#define SDHCI_COMMAND_FLAGS 0x0E
#define SDHCI_CMD_RESP_NONE 0x00
#define SDHCI_CMD_RESP_LONG 0x01
#define SDHCI_CMD_RESP_SHORT 0x02
#define SDHCI_CMD_RESP_SHORT_BUSY 0x03
#define SDHCI_CMD_RESP_MASK 0x03
#define SDHCI_CMD_CRC 0x08
#define SDHCI_CMD_INDEX 0x10
#define SDHCI_CMD_DATA 0x20
#define SDHCI_CMD_TYPE_NORMAL 0x00
#define SDHCI_CMD_TYPE_SUSPEND 0x40
#define SDHCI_CMD_TYPE_RESUME 0x80
#define SDHCI_CMD_TYPE_ABORT 0xc0
#define SDHCI_CMD_TYPE_MASK 0xc0
#define SDHCI_COMMAND 0x0F
#define SDHCI_RESPONSE 0x10
#define SDHCI_BUFFER 0x20
#define SDHCI_PRESENT_STATE 0x24
#define SDHCI_CMD_INHIBIT 0x00000001
#define SDHCI_DAT_INHIBIT 0x00000002
#define SDHCI_DAT_ACTIVE 0x00000004
#define SDHCI_RETUNE_REQUEST 0x00000008
#define SDHCI_DOING_WRITE 0x00000100
#define SDHCI_DOING_READ 0x00000200
#define SDHCI_SPACE_AVAILABLE 0x00000400
#define SDHCI_DATA_AVAILABLE 0x00000800
#define SDHCI_CARD_PRESENT 0x00010000
#define SDHCI_CARD_STABLE 0x00020000
#define SDHCI_CARD_PIN 0x00040000
#define SDHCI_WRITE_PROTECT 0x00080000
#define SDHCI_STATE_DAT_MASK 0x00f00000
#define SDHCI_STATE_CMD 0x01000000
#define SDHCI_HOST_CONTROL 0x28
#define SDHCI_CTRL_LED 0x01
#define SDHCI_CTRL_4BITBUS 0x02
#define SDHCI_CTRL_HISPD 0x04
#define SDHCI_CTRL_SDMA 0x08
#define SDHCI_CTRL_ADMA2 0x10
#define SDHCI_CTRL_ADMA264 0x18
#define SDHCI_CTRL_DMA_MASK 0x18
#define SDHCI_CTRL_8BITBUS 0x20
#define SDHCI_CTRL_CARD_DET 0x40
#define SDHCI_CTRL_FORCE_CARD 0x80
#define SDHCI_POWER_CONTROL 0x29
#define SDHCI_POWER_ON 0x01
#define SDHCI_POWER_180 0x0A
#define SDHCI_POWER_300 0x0C
#define SDHCI_POWER_330 0x0E
#define SDHCI_BLOCK_GAP_CONTROL 0x2A
#define SDHCI_WAKE_UP_CONTROL 0x2B
#define SDHCI_CLOCK_CONTROL 0x2C
#define SDHCI_DIVIDER_MASK 0xff
#define SDHCI_DIVIDER_MASK_LEN 8
#define SDHCI_DIVIDER_SHIFT 8
#define SDHCI_DIVIDER_HI_MASK 3
#define SDHCI_DIVIDER_HI_SHIFT 6
#define SDHCI_CLOCK_CARD_EN 0x0004
#define SDHCI_CLOCK_INT_STABLE 0x0002
#define SDHCI_CLOCK_INT_EN 0x0001
#define SDHCI_TIMEOUT_CONTROL 0x2E
#define SDHCI_SOFTWARE_RESET 0x2F
#define SDHCI_RESET_ALL 0x01
#define SDHCI_RESET_CMD 0x02
#define SDHCI_RESET_DATA 0x04
#define SDHCI_INT_STATUS 0x30
#define SDHCI_INT_ENABLE 0x34
#define SDHCI_SIGNAL_ENABLE 0x38
#define SDHCI_INT_RESPONSE 0x00000001
#define SDHCI_INT_DATA_END 0x00000002
#define SDHCI_INT_BLOCK_GAP 0x00000004
#define SDHCI_INT_DMA_END 0x00000008
#define SDHCI_INT_SPACE_AVAIL 0x00000010
#define SDHCI_INT_DATA_AVAIL 0x00000020
#define SDHCI_INT_CARD_INSERT 0x00000040
#define SDHCI_INT_CARD_REMOVE 0x00000080
#define SDHCI_INT_CARD_INT 0x00000100
#define SDHCI_INT_ERROR 0x00008000
#define SDHCI_INT_TIMEOUT 0x00010000
#define SDHCI_INT_CRC 0x00020000
#define SDHCI_INT_END_BIT 0x00040000
#define SDHCI_INT_INDEX 0x00080000
#define SDHCI_INT_DATA_TIMEOUT 0x00100000
#define SDHCI_INT_DATA_CRC 0x00200000
#define SDHCI_INT_DATA_END_BIT 0x00400000
#define SDHCI_INT_BUS_POWER 0x00800000
#define SDHCI_INT_ACMD12ERR 0x01000000
#define SDHCI_INT_ADMAERR 0x02000000
#define SDHCI_INT_NORMAL_MASK 0x00007FFF
#define SDHCI_INT_ERROR_MASK 0xFFFF8000
#define SDHCI_INT_CMD_MASK (SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \
SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
#define SDHCI_INT_DATA_MASK (SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \
SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \
SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \
SDHCI_INT_DATA_END_BIT)
#define SDHCI_ACMD12_ERR 0x3C
#define SDHCI_CAPABILITIES 0x40
#define SDHCI_TIMEOUT_CLK_MASK 0x0000003F
#define SDHCI_TIMEOUT_CLK_SHIFT 0
#define SDHCI_TIMEOUT_CLK_UNIT 0x00000080
#define SDHCI_CLOCK_BASE_MASK 0x00003F00
#define SDHCI_CLOCK_V3_BASE_MASK 0x0000FF00
#define SDHCI_CLOCK_BASE_SHIFT 8
#define SDHCI_MAX_BLOCK_MASK 0x00030000
#define SDHCI_MAX_BLOCK_SHIFT 16
#define SDHCI_CAN_DO_8BITBUS 0x00040000
#define SDHCI_CAN_DO_ADMA2 0x00080000
#define SDHCI_CAN_DO_HISPD 0x00200000
#define SDHCI_CAN_DO_DMA 0x00400000
#define SDHCI_CAN_DO_SUSPEND 0x00800000
#define SDHCI_CAN_VDD_330 0x01000000
#define SDHCI_CAN_VDD_300 0x02000000
#define SDHCI_CAN_VDD_180 0x04000000
#define SDHCI_CAN_DO_64BIT 0x10000000
#define SDHCI_MAX_CURRENT 0x48
#define SDHCI_SLOT_INT_STATUS 0xFC
#define SDHCI_HOST_VERSION 0xFE
#define SDHCI_VENDOR_VER_MASK 0xFF00
#define SDHCI_VENDOR_VER_SHIFT 8
#define SDHCI_SPEC_VER_MASK 0x00FF
#define SDHCI_SPEC_VER_SHIFT 0
#define SDHCI_SPEC_100 0
#define SDHCI_SPEC_200 1
#define SDHCI_SPEC_300 2
struct sdhci_slot {
u_int quirks; /* Chip specific quirks */
u_int caps; /* Override SDHCI_CAPABILITIES */
device_t bus; /* Bus device */
device_t dev; /* Slot device */
u_char num; /* Slot number */
u_char opt; /* Slot options */
#define SDHCI_HAVE_DMA 1
#define SDHCI_PLATFORM_TRANSFER 2
u_char version;
uint32_t max_clk; /* Max possible freq */
uint32_t timeout_clk; /* Timeout freq */
bus_dma_tag_t dmatag;
bus_dmamap_t dmamap;
u_char *dmamem;
bus_addr_t paddr; /* DMA buffer address */
struct task card_task; /* Card presence check task */
struct callout card_callout; /* Card insert delay callout */
struct callout timeout_callout;/* Card command/data response timeout */
struct mmc_host host; /* Host parameters */
struct mmc_request *req; /* Current request */
struct mmc_command *curcmd; /* Current command of current request */
uint32_t intmask; /* Current interrupt mask */
uint32_t clock; /* Current clock freq. */
size_t offset; /* Data buffer offset */
uint8_t hostctrl; /* Current host control register */
u_char power; /* Current power */
u_char bus_busy; /* Bus busy status */
u_char cmd_done; /* CMD command part done flag */
u_char data_done; /* DAT command part done flag */
u_char flags; /* Request execution flags */
#define CMD_STARTED 1
#define STOP_STARTED 2
#define SDHCI_USE_DMA 4 /* Use DMA for this req. */
#define PLATFORM_DATA_STARTED 8 /* Data transfer is handled by platform */
struct mtx mtx; /* Slot mutex */
};
int sdhci_generic_read_ivar(device_t bus, device_t child, int which, uintptr_t *result);
int sdhci_generic_write_ivar(device_t bus, device_t child, int which, uintptr_t value);
int sdhci_init_slot(device_t dev, struct sdhci_slot *slot, int num);
void sdhci_start_slot(struct sdhci_slot *slot);
/* performs generic clean-up for platform transfers */
void sdhci_finish_data(struct sdhci_slot *slot);
int sdhci_cleanup_slot(struct sdhci_slot *slot);
int sdhci_generic_suspend(struct sdhci_slot *slot);
int sdhci_generic_resume(struct sdhci_slot *slot);
int sdhci_generic_update_ios(device_t brdev, device_t reqdev);
int sdhci_generic_request(device_t brdev, device_t reqdev, struct mmc_request *req);
int sdhci_generic_get_ro(device_t brdev, device_t reqdev);
int sdhci_generic_acquire_host(device_t brdev, device_t reqdev);
int sdhci_generic_release_host(device_t brdev, device_t reqdev);
void sdhci_generic_intr(struct sdhci_slot *slot);
uint32_t sdhci_generic_min_freq(device_t brdev, struct sdhci_slot *slot);
#endif /* __SDHCI_H__ */
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