M: Jaehoon Chung <jh80.chung@samsung.com>
L: linux-mmc@vger.kernel.org
S: Maintained
-F: include/linux/mmc/dw_mmc.h
F: drivers/mmc/host/dw_mmc*
SYSTEM TRACE MODULE CLASS
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/mmc/host.h>
-#include <linux/mmc/dw_mmc.h>
#include <linux/mmc/mmc.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/clk.h>
#include <linux/mfd/syscon.h>
#include <linux/mmc/host.h>
-#include <linux/mmc/dw_mmc.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
-#include <linux/mmc/dw_mmc.h>
#include "dw_mmc.h"
#define PCI_BAR_NO 2
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
-#include <linux/mmc/dw_mmc.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/mmc/host.h>
-#include <linux/mmc/dw_mmc.h>
#include <linux/of_address.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/pm_runtime.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/sdio.h>
-#include <linux/mmc/dw_mmc.h>
#include <linux/bitops.h>
#include <linux/regulator/consumer.h>
#include <linux/of.h>
#ifndef _DW_MMC_H_
#define _DW_MMC_H_
+#include <linux/scatterlist.h>
+#include <linux/mmc/core.h>
+#include <linux/dmaengine.h>
+#include <linux/reset.h>
+
+#define MAX_MCI_SLOTS 2
+
+enum dw_mci_state {
+ STATE_IDLE = 0,
+ STATE_SENDING_CMD,
+ STATE_SENDING_DATA,
+ STATE_DATA_BUSY,
+ STATE_SENDING_STOP,
+ STATE_DATA_ERROR,
+ STATE_SENDING_CMD11,
+ STATE_WAITING_CMD11_DONE,
+};
+
+enum {
+ EVENT_CMD_COMPLETE = 0,
+ EVENT_XFER_COMPLETE,
+ EVENT_DATA_COMPLETE,
+ EVENT_DATA_ERROR,
+};
+
+enum dw_mci_cookie {
+ COOKIE_UNMAPPED,
+ COOKIE_PRE_MAPPED, /* mapped by pre_req() of dwmmc */
+ COOKIE_MAPPED, /* mapped by prepare_data() of dwmmc */
+};
+
+struct mmc_data;
+
+enum {
+ TRANS_MODE_PIO = 0,
+ TRANS_MODE_IDMAC,
+ TRANS_MODE_EDMAC
+};
+
+struct dw_mci_dma_slave {
+ struct dma_chan *ch;
+ enum dma_transfer_direction direction;
+};
+
+/**
+ * struct dw_mci - MMC controller state shared between all slots
+ * @lock: Spinlock protecting the queue and associated data.
+ * @irq_lock: Spinlock protecting the INTMASK setting.
+ * @regs: Pointer to MMIO registers.
+ * @fifo_reg: Pointer to MMIO registers for data FIFO
+ * @sg: Scatterlist entry currently being processed by PIO code, if any.
+ * @sg_miter: PIO mapping scatterlist iterator.
+ * @cur_slot: The slot which is currently using the controller.
+ * @mrq: The request currently being processed on @cur_slot,
+ * or NULL if the controller is idle.
+ * @cmd: The command currently being sent to the card, or NULL.
+ * @data: The data currently being transferred, or NULL if no data
+ * transfer is in progress.
+ * @stop_abort: The command currently prepared for stoping transfer.
+ * @prev_blksz: The former transfer blksz record.
+ * @timing: Record of current ios timing.
+ * @use_dma: Whether DMA channel is initialized or not.
+ * @using_dma: Whether DMA is in use for the current transfer.
+ * @dma_64bit_address: Whether DMA supports 64-bit address mode or not.
+ * @sg_dma: Bus address of DMA buffer.
+ * @sg_cpu: Virtual address of DMA buffer.
+ * @dma_ops: Pointer to platform-specific DMA callbacks.
+ * @cmd_status: Snapshot of SR taken upon completion of the current
+ * @ring_size: Buffer size for idma descriptors.
+ * command. Only valid when EVENT_CMD_COMPLETE is pending.
+ * @dms: structure of slave-dma private data.
+ * @phy_regs: physical address of controller's register map
+ * @data_status: Snapshot of SR taken upon completion of the current
+ * data transfer. Only valid when EVENT_DATA_COMPLETE or
+ * EVENT_DATA_ERROR is pending.
+ * @stop_cmdr: Value to be loaded into CMDR when the stop command is
+ * to be sent.
+ * @dir_status: Direction of current transfer.
+ * @tasklet: Tasklet running the request state machine.
+ * @pending_events: Bitmask of events flagged by the interrupt handler
+ * to be processed by the tasklet.
+ * @completed_events: Bitmask of events which the state machine has
+ * processed.
+ * @state: Tasklet state.
+ * @queue: List of slots waiting for access to the controller.
+ * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus
+ * rate and timeout calculations.
+ * @current_speed: Configured rate of the controller.
+ * @num_slots: Number of slots available.
+ * @fifoth_val: The value of FIFOTH register.
+ * @verid: Denote Version ID.
+ * @dev: Device associated with the MMC controller.
+ * @pdata: Platform data associated with the MMC controller.
+ * @drv_data: Driver specific data for identified variant of the controller
+ * @priv: Implementation defined private data.
+ * @biu_clk: Pointer to bus interface unit clock instance.
+ * @ciu_clk: Pointer to card interface unit clock instance.
+ * @slot: Slots sharing this MMC controller.
+ * @fifo_depth: depth of FIFO.
+ * @data_shift: log2 of FIFO item size.
+ * @part_buf_start: Start index in part_buf.
+ * @part_buf_count: Bytes of partial data in part_buf.
+ * @part_buf: Simple buffer for partial fifo reads/writes.
+ * @push_data: Pointer to FIFO push function.
+ * @pull_data: Pointer to FIFO pull function.
+ * @vqmmc_enabled: Status of vqmmc, should be true or false.
+ * @irq_flags: The flags to be passed to request_irq.
+ * @irq: The irq value to be passed to request_irq.
+ * @sdio_id0: Number of slot0 in the SDIO interrupt registers.
+ * @cmd11_timer: Timer for SD3.0 voltage switch over scheme.
+ * @dto_timer: Timer for broken data transfer over scheme.
+ *
+ * Locking
+ * =======
+ *
+ * @lock is a softirq-safe spinlock protecting @queue as well as
+ * @cur_slot, @mrq and @state. These must always be updated
+ * at the same time while holding @lock.
+ *
+ * @irq_lock is an irq-safe spinlock protecting the INTMASK register
+ * to allow the interrupt handler to modify it directly. Held for only long
+ * enough to read-modify-write INTMASK and no other locks are grabbed when
+ * holding this one.
+ *
+ * The @mrq field of struct dw_mci_slot is also protected by @lock,
+ * and must always be written at the same time as the slot is added to
+ * @queue.
+ *
+ * @pending_events and @completed_events are accessed using atomic bit
+ * operations, so they don't need any locking.
+ *
+ * None of the fields touched by the interrupt handler need any
+ * locking. However, ordering is important: Before EVENT_DATA_ERROR or
+ * EVENT_DATA_COMPLETE is set in @pending_events, all data-related
+ * interrupts must be disabled and @data_status updated with a
+ * snapshot of SR. Similarly, before EVENT_CMD_COMPLETE is set, the
+ * CMDRDY interrupt must be disabled and @cmd_status updated with a
+ * snapshot of SR, and before EVENT_XFER_COMPLETE can be set, the
+ * bytes_xfered field of @data must be written. This is ensured by
+ * using barriers.
+ */
+struct dw_mci {
+ spinlock_t lock;
+ spinlock_t irq_lock;
+ void __iomem *regs;
+ void __iomem *fifo_reg;
+
+ struct scatterlist *sg;
+ struct sg_mapping_iter sg_miter;
+
+ struct dw_mci_slot *cur_slot;
+ struct mmc_request *mrq;
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+ struct mmc_command stop_abort;
+ unsigned int prev_blksz;
+ unsigned char timing;
+
+ /* DMA interface members*/
+ int use_dma;
+ int using_dma;
+ int dma_64bit_address;
+
+ dma_addr_t sg_dma;
+ void *sg_cpu;
+ const struct dw_mci_dma_ops *dma_ops;
+ /* For idmac */
+ unsigned int ring_size;
+
+ /* For edmac */
+ struct dw_mci_dma_slave *dms;
+ /* Registers's physical base address */
+ resource_size_t phy_regs;
+
+ u32 cmd_status;
+ u32 data_status;
+ u32 stop_cmdr;
+ u32 dir_status;
+ struct tasklet_struct tasklet;
+ unsigned long pending_events;
+ unsigned long completed_events;
+ enum dw_mci_state state;
+ struct list_head queue;
+
+ u32 bus_hz;
+ u32 current_speed;
+ u32 num_slots;
+ u32 fifoth_val;
+ u16 verid;
+ struct device *dev;
+ struct dw_mci_board *pdata;
+ const struct dw_mci_drv_data *drv_data;
+ void *priv;
+ struct clk *biu_clk;
+ struct clk *ciu_clk;
+ struct dw_mci_slot *slot[MAX_MCI_SLOTS];
+
+ /* FIFO push and pull */
+ int fifo_depth;
+ int data_shift;
+ u8 part_buf_start;
+ u8 part_buf_count;
+ union {
+ u16 part_buf16;
+ u32 part_buf32;
+ u64 part_buf;
+ };
+ void (*push_data)(struct dw_mci *host, void *buf, int cnt);
+ void (*pull_data)(struct dw_mci *host, void *buf, int cnt);
+
+ bool vqmmc_enabled;
+ unsigned long irq_flags; /* IRQ flags */
+ int irq;
+
+ int sdio_id0;
+
+ struct timer_list cmd11_timer;
+ struct timer_list dto_timer;
+};
+
+/* DMA ops for Internal/External DMAC interface */
+struct dw_mci_dma_ops {
+ /* DMA Ops */
+ int (*init)(struct dw_mci *host);
+ int (*start)(struct dw_mci *host, unsigned int sg_len);
+ void (*complete)(void *host);
+ void (*stop)(struct dw_mci *host);
+ void (*cleanup)(struct dw_mci *host);
+ void (*exit)(struct dw_mci *host);
+};
+
+struct dma_pdata;
+
+/* Board platform data */
+struct dw_mci_board {
+ u32 num_slots;
+
+ unsigned int bus_hz; /* Clock speed at the cclk_in pad */
+
+ u32 caps; /* Capabilities */
+ u32 caps2; /* More capabilities */
+ u32 pm_caps; /* PM capabilities */
+ /*
+ * Override fifo depth. If 0, autodetect it from the FIFOTH register,
+ * but note that this may not be reliable after a bootloader has used
+ * it.
+ */
+ unsigned int fifo_depth;
+
+ /* delay in mS before detecting cards after interrupt */
+ u32 detect_delay_ms;
+
+ struct reset_control *rstc;
+ struct dw_mci_dma_ops *dma_ops;
+ struct dma_pdata *data;
+};
+
#define DW_MMC_240A 0x240a
#define DW_MMC_280A 0x280a
+++ /dev/null
-/*
- * Synopsys DesignWare Multimedia Card Interface driver
- * (Based on NXP driver for lpc 31xx)
- *
- * Copyright (C) 2009 NXP Semiconductors
- * Copyright (C) 2009, 2010 Imagination Technologies Ltd.
- *
- * 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.
- */
-
-#ifndef LINUX_MMC_DW_MMC_H
-#define LINUX_MMC_DW_MMC_H
-
-#include <linux/scatterlist.h>
-#include <linux/mmc/core.h>
-#include <linux/dmaengine.h>
-#include <linux/reset.h>
-
-#define MAX_MCI_SLOTS 2
-
-enum dw_mci_state {
- STATE_IDLE = 0,
- STATE_SENDING_CMD,
- STATE_SENDING_DATA,
- STATE_DATA_BUSY,
- STATE_SENDING_STOP,
- STATE_DATA_ERROR,
- STATE_SENDING_CMD11,
- STATE_WAITING_CMD11_DONE,
-};
-
-enum {
- EVENT_CMD_COMPLETE = 0,
- EVENT_XFER_COMPLETE,
- EVENT_DATA_COMPLETE,
- EVENT_DATA_ERROR,
-};
-
-enum dw_mci_cookie {
- COOKIE_UNMAPPED,
- COOKIE_PRE_MAPPED, /* mapped by pre_req() of dwmmc */
- COOKIE_MAPPED, /* mapped by prepare_data() of dwmmc */
-};
-
-struct mmc_data;
-
-enum {
- TRANS_MODE_PIO = 0,
- TRANS_MODE_IDMAC,
- TRANS_MODE_EDMAC
-};
-
-struct dw_mci_dma_slave {
- struct dma_chan *ch;
- enum dma_transfer_direction direction;
-};
-
-/**
- * struct dw_mci - MMC controller state shared between all slots
- * @lock: Spinlock protecting the queue and associated data.
- * @irq_lock: Spinlock protecting the INTMASK setting.
- * @regs: Pointer to MMIO registers.
- * @fifo_reg: Pointer to MMIO registers for data FIFO
- * @sg: Scatterlist entry currently being processed by PIO code, if any.
- * @sg_miter: PIO mapping scatterlist iterator.
- * @cur_slot: The slot which is currently using the controller.
- * @mrq: The request currently being processed on @cur_slot,
- * or NULL if the controller is idle.
- * @cmd: The command currently being sent to the card, or NULL.
- * @data: The data currently being transferred, or NULL if no data
- * transfer is in progress.
- * @stop_abort: The command currently prepared for stoping transfer.
- * @prev_blksz: The former transfer blksz record.
- * @timing: Record of current ios timing.
- * @use_dma: Whether DMA channel is initialized or not.
- * @using_dma: Whether DMA is in use for the current transfer.
- * @dma_64bit_address: Whether DMA supports 64-bit address mode or not.
- * @sg_dma: Bus address of DMA buffer.
- * @sg_cpu: Virtual address of DMA buffer.
- * @dma_ops: Pointer to platform-specific DMA callbacks.
- * @cmd_status: Snapshot of SR taken upon completion of the current
- * @ring_size: Buffer size for idma descriptors.
- * command. Only valid when EVENT_CMD_COMPLETE is pending.
- * @dms: structure of slave-dma private data.
- * @phy_regs: physical address of controller's register map
- * @data_status: Snapshot of SR taken upon completion of the current
- * data transfer. Only valid when EVENT_DATA_COMPLETE or
- * EVENT_DATA_ERROR is pending.
- * @stop_cmdr: Value to be loaded into CMDR when the stop command is
- * to be sent.
- * @dir_status: Direction of current transfer.
- * @tasklet: Tasklet running the request state machine.
- * @pending_events: Bitmask of events flagged by the interrupt handler
- * to be processed by the tasklet.
- * @completed_events: Bitmask of events which the state machine has
- * processed.
- * @state: Tasklet state.
- * @queue: List of slots waiting for access to the controller.
- * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus
- * rate and timeout calculations.
- * @current_speed: Configured rate of the controller.
- * @num_slots: Number of slots available.
- * @fifoth_val: The value of FIFOTH register.
- * @verid: Denote Version ID.
- * @dev: Device associated with the MMC controller.
- * @pdata: Platform data associated with the MMC controller.
- * @drv_data: Driver specific data for identified variant of the controller
- * @priv: Implementation defined private data.
- * @biu_clk: Pointer to bus interface unit clock instance.
- * @ciu_clk: Pointer to card interface unit clock instance.
- * @slot: Slots sharing this MMC controller.
- * @fifo_depth: depth of FIFO.
- * @data_shift: log2 of FIFO item size.
- * @part_buf_start: Start index in part_buf.
- * @part_buf_count: Bytes of partial data in part_buf.
- * @part_buf: Simple buffer for partial fifo reads/writes.
- * @push_data: Pointer to FIFO push function.
- * @pull_data: Pointer to FIFO pull function.
- * @vqmmc_enabled: Status of vqmmc, should be true or false.
- * @irq_flags: The flags to be passed to request_irq.
- * @irq: The irq value to be passed to request_irq.
- * @sdio_id0: Number of slot0 in the SDIO interrupt registers.
- * @cmd11_timer: Timer for SD3.0 voltage switch over scheme.
- * @dto_timer: Timer for broken data transfer over scheme.
- *
- * Locking
- * =======
- *
- * @lock is a softirq-safe spinlock protecting @queue as well as
- * @cur_slot, @mrq and @state. These must always be updated
- * at the same time while holding @lock.
- *
- * @irq_lock is an irq-safe spinlock protecting the INTMASK register
- * to allow the interrupt handler to modify it directly. Held for only long
- * enough to read-modify-write INTMASK and no other locks are grabbed when
- * holding this one.
- *
- * The @mrq field of struct dw_mci_slot is also protected by @lock,
- * and must always be written at the same time as the slot is added to
- * @queue.
- *
- * @pending_events and @completed_events are accessed using atomic bit
- * operations, so they don't need any locking.
- *
- * None of the fields touched by the interrupt handler need any
- * locking. However, ordering is important: Before EVENT_DATA_ERROR or
- * EVENT_DATA_COMPLETE is set in @pending_events, all data-related
- * interrupts must be disabled and @data_status updated with a
- * snapshot of SR. Similarly, before EVENT_CMD_COMPLETE is set, the
- * CMDRDY interrupt must be disabled and @cmd_status updated with a
- * snapshot of SR, and before EVENT_XFER_COMPLETE can be set, the
- * bytes_xfered field of @data must be written. This is ensured by
- * using barriers.
- */
-struct dw_mci {
- spinlock_t lock;
- spinlock_t irq_lock;
- void __iomem *regs;
- void __iomem *fifo_reg;
-
- struct scatterlist *sg;
- struct sg_mapping_iter sg_miter;
-
- struct dw_mci_slot *cur_slot;
- struct mmc_request *mrq;
- struct mmc_command *cmd;
- struct mmc_data *data;
- struct mmc_command stop_abort;
- unsigned int prev_blksz;
- unsigned char timing;
-
- /* DMA interface members*/
- int use_dma;
- int using_dma;
- int dma_64bit_address;
-
- dma_addr_t sg_dma;
- void *sg_cpu;
- const struct dw_mci_dma_ops *dma_ops;
- /* For idmac */
- unsigned int ring_size;
-
- /* For edmac */
- struct dw_mci_dma_slave *dms;
- /* Registers's physical base address */
- resource_size_t phy_regs;
-
- u32 cmd_status;
- u32 data_status;
- u32 stop_cmdr;
- u32 dir_status;
- struct tasklet_struct tasklet;
- unsigned long pending_events;
- unsigned long completed_events;
- enum dw_mci_state state;
- struct list_head queue;
-
- u32 bus_hz;
- u32 current_speed;
- u32 num_slots;
- u32 fifoth_val;
- u16 verid;
- struct device *dev;
- struct dw_mci_board *pdata;
- const struct dw_mci_drv_data *drv_data;
- void *priv;
- struct clk *biu_clk;
- struct clk *ciu_clk;
- struct dw_mci_slot *slot[MAX_MCI_SLOTS];
-
- /* FIFO push and pull */
- int fifo_depth;
- int data_shift;
- u8 part_buf_start;
- u8 part_buf_count;
- union {
- u16 part_buf16;
- u32 part_buf32;
- u64 part_buf;
- };
- void (*push_data)(struct dw_mci *host, void *buf, int cnt);
- void (*pull_data)(struct dw_mci *host, void *buf, int cnt);
-
- bool vqmmc_enabled;
- unsigned long irq_flags; /* IRQ flags */
- int irq;
-
- int sdio_id0;
-
- struct timer_list cmd11_timer;
- struct timer_list dto_timer;
-};
-
-/* DMA ops for Internal/External DMAC interface */
-struct dw_mci_dma_ops {
- /* DMA Ops */
- int (*init)(struct dw_mci *host);
- int (*start)(struct dw_mci *host, unsigned int sg_len);
- void (*complete)(void *host);
- void (*stop)(struct dw_mci *host);
- void (*cleanup)(struct dw_mci *host);
- void (*exit)(struct dw_mci *host);
-};
-
-struct dma_pdata;
-
-/* Board platform data */
-struct dw_mci_board {
- u32 num_slots;
-
- unsigned int bus_hz; /* Clock speed at the cclk_in pad */
-
- u32 caps; /* Capabilities */
- u32 caps2; /* More capabilities */
- u32 pm_caps; /* PM capabilities */
- /*
- * Override fifo depth. If 0, autodetect it from the FIFOTH register,
- * but note that this may not be reliable after a bootloader has used
- * it.
- */
- unsigned int fifo_depth;
-
- /* delay in mS before detecting cards after interrupt */
- u32 detect_delay_ms;
-
- struct reset_control *rstc;
- struct dw_mci_dma_ops *dma_ops;
- struct dma_pdata *data;
-};
-
-#endif /* LINUX_MMC_DW_MMC_H */
projects / karo-tx-linux.git / commitdiff