| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Will Newton | 537 | 34.94% | 1 | 2.44% |
| Ulf Hansson | 483 | 31.42% | 2 | 4.88% |
| Seungwon Jeon | 99 | 6.44% | 4 | 9.76% |
| Shawn Lin | 77 | 5.01% | 5 | 12.20% |
| Ben Dooks | 71 | 4.62% | 2 | 4.88% |
| Jaehoon Chung | 58 | 3.77% | 9 | 21.95% |
| Thomas Abraham | 51 | 3.32% | 1 | 2.44% |
| Prabu Thangamuthu | 32 | 2.08% | 1 | 2.44% |
| Shashidhar Hiremath | 30 | 1.95% | 2 | 4.88% |
| Doug Anderson | 21 | 1.37% | 2 | 4.88% |
| tianshuliang | 18 | 1.17% | 1 | 2.44% |
| Zhangfei Gao | 17 | 1.11% | 1 | 2.44% |
| Sonny Rao | 10 | 0.65% | 1 | 2.44% |
| Li Wei | 8 | 0.52% | 1 | 2.44% |
| addy ke | 7 | 0.46% | 2 | 4.88% |
| Jun Nie | 6 | 0.39% | 2 | 4.88% |
| Dinh Nguyen | 4 | 0.26% | 1 | 2.44% |
| Alexey Roslyakov | 3 | 0.20% | 1 | 2.44% |
| Chaotian Jing | 3 | 0.20% | 1 | 2.44% |
| James Hogan | 2 | 0.13% | 1 | 2.44% |
| Total | 1537 | 41 |
/* * 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 _DW_MMC_H_ #define _DW_MMC_H_ #include <linux/scatterlist.h> #include <linux/mmc/core.h> #include <linux/dmaengine.h> #include <linux/reset.h> #include <linux/interrupt.h> 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. * @mrq: The request currently being processed on @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: Which DMA channel is in use for the current transfer, zero * denotes PIO mode. * @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. * @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_addr_override: override fifo reg offset with this value. * @wm_aligned: force fifo watermark equal with data length in PIO mode. * Set as true if alignment is needed. * @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. * @cto_timer: Timer for broken command transfer over scheme. * @dto_timer: Timer for broken data transfer over scheme. * * Locking * ======= * * @lock is a softirq-safe spinlock protecting @queue as well as * @slot, @mrq and @state. These must always be updated * at the same time while holding @lock. * 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. * * @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. * * @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; u32 data_addr_override; bool wm_aligned; struct scatterlist *sg; struct sg_mapping_iter sg_miter; 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 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; /* 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 cto_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 { 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 #define SDMMC_CTRL 0x000 #define SDMMC_PWREN 0x004 #define SDMMC_CLKDIV 0x008 #define SDMMC_CLKSRC 0x00c #define SDMMC_CLKENA 0x010 #define SDMMC_TMOUT 0x014 #define SDMMC_CTYPE 0x018 #define SDMMC_BLKSIZ 0x01c #define SDMMC_BYTCNT 0x020 #define SDMMC_INTMASK 0x024 #define SDMMC_CMDARG 0x028 #define SDMMC_CMD 0x02c #define SDMMC_RESP0 0x030 #define SDMMC_RESP1 0x034 #define SDMMC_RESP2 0x038 #define SDMMC_RESP3 0x03c #define SDMMC_MINTSTS 0x040 #define SDMMC_RINTSTS 0x044 #define SDMMC_STATUS 0x048 #define SDMMC_FIFOTH 0x04c #define SDMMC_CDETECT 0x050 #define SDMMC_WRTPRT 0x054 #define SDMMC_GPIO 0x058 #define SDMMC_TCBCNT 0x05c #define SDMMC_TBBCNT 0x060 #define SDMMC_DEBNCE 0x064 #define SDMMC_USRID 0x068 #define SDMMC_VERID 0x06c #define SDMMC_HCON 0x070 #define SDMMC_UHS_REG 0x074 #define SDMMC_RST_N 0x078 #define SDMMC_BMOD 0x080 #define SDMMC_PLDMND 0x084 #define SDMMC_DBADDR 0x088 #define SDMMC_IDSTS 0x08c #define SDMMC_IDINTEN 0x090 #define SDMMC_DSCADDR 0x094 #define SDMMC_BUFADDR 0x098 #define SDMMC_CDTHRCTL 0x100 #define SDMMC_UHS_REG_EXT 0x108 #define SDMMC_DDR_REG 0x10c #define SDMMC_ENABLE_SHIFT 0x110 #define SDMMC_DATA(x) (x) /* * Registers to support idmac 64-bit address mode */ #define SDMMC_DBADDRL 0x088 #define SDMMC_DBADDRU 0x08c #define SDMMC_IDSTS64 0x090 #define SDMMC_IDINTEN64 0x094 #define SDMMC_DSCADDRL 0x098 #define SDMMC_DSCADDRU 0x09c #define SDMMC_BUFADDRL 0x0A0 #define SDMMC_BUFADDRU 0x0A4 /* * Data offset is difference according to Version * Lower than 2.40a : data register offest is 0x100 */ #define DATA_OFFSET 0x100 #define DATA_240A_OFFSET 0x200 /* shift bit field */ #define _SBF(f, v) ((v) << (f)) /* Control register defines */ #define SDMMC_CTRL_USE_IDMAC BIT(25) #define SDMMC_CTRL_CEATA_INT_EN BIT(11) #define SDMMC_CTRL_SEND_AS_CCSD BIT(10) #define SDMMC_CTRL_SEND_CCSD BIT(9) #define SDMMC_CTRL_ABRT_READ_DATA BIT(8) #define SDMMC_CTRL_SEND_IRQ_RESP BIT(7) #define SDMMC_CTRL_READ_WAIT BIT(6) #define SDMMC_CTRL_DMA_ENABLE BIT(5) #define SDMMC_CTRL_INT_ENABLE BIT(4) #define SDMMC_CTRL_DMA_RESET BIT(2) #define SDMMC_CTRL_FIFO_RESET BIT(1) #define SDMMC_CTRL_RESET BIT(0) /* Clock Enable register defines */ #define SDMMC_CLKEN_LOW_PWR BIT(16) #define SDMMC_CLKEN_ENABLE BIT(0) /* time-out register defines */ #define SDMMC_TMOUT_DATA(n) _SBF(8, (n)) #define SDMMC_TMOUT_DATA_MSK 0xFFFFFF00 #define SDMMC_TMOUT_RESP(n) ((n) & 0xFF) #define SDMMC_TMOUT_RESP_MSK 0xFF /* card-type register defines */ #define SDMMC_CTYPE_8BIT BIT(16) #define SDMMC_CTYPE_4BIT BIT(0) #define SDMMC_CTYPE_1BIT 0 /* Interrupt status & mask register defines */ #define SDMMC_INT_SDIO(n) BIT(16 + (n)) #define SDMMC_INT_EBE BIT(15) #define SDMMC_INT_ACD BIT(14) #define SDMMC_INT_SBE BIT(13) #define SDMMC_INT_HLE BIT(12) #define SDMMC_INT_FRUN BIT(11) #define SDMMC_INT_HTO BIT(10) #define SDMMC_INT_VOLT_SWITCH BIT(10) /* overloads bit 10! */ #define SDMMC_INT_DRTO BIT(9) #define SDMMC_INT_RTO BIT(8) #define SDMMC_INT_DCRC BIT(7) #define SDMMC_INT_RCRC BIT(6) #define SDMMC_INT_RXDR BIT(5) #define SDMMC_INT_TXDR BIT(4) #define SDMMC_INT_DATA_OVER BIT(3) #define SDMMC_INT_CMD_DONE BIT(2) #define SDMMC_INT_RESP_ERR BIT(1) #define SDMMC_INT_CD BIT(0) #define SDMMC_INT_ERROR 0xbfc2 /* Command register defines */ #define SDMMC_CMD_START BIT(31) #define SDMMC_CMD_USE_HOLD_REG BIT(29) #define SDMMC_CMD_VOLT_SWITCH BIT(28) #define SDMMC_CMD_CCS_EXP BIT(23) #define SDMMC_CMD_CEATA_RD BIT(22) #define SDMMC_CMD_UPD_CLK BIT(21) #define SDMMC_CMD_INIT BIT(15) #define SDMMC_CMD_STOP BIT(14) #define SDMMC_CMD_PRV_DAT_WAIT BIT(13) #define SDMMC_CMD_SEND_STOP BIT(12) #define SDMMC_CMD_STRM_MODE BIT(11) #define SDMMC_CMD_DAT_WR BIT(10) #define SDMMC_CMD_DAT_EXP BIT(9) #define SDMMC_CMD_RESP_CRC BIT(8) #define SDMMC_CMD_RESP_LONG BIT(7) #define SDMMC_CMD_RESP_EXP BIT(6) #define SDMMC_CMD_INDX(n) ((n) & 0x1F) /* Status register defines */ #define SDMMC_GET_FCNT(x) (((x)>>17) & 0x1FFF) #define SDMMC_STATUS_DMA_REQ BIT(31) #define SDMMC_STATUS_BUSY BIT(9) /* FIFOTH register defines */ #define SDMMC_SET_FIFOTH(m, r, t) (((m) & 0x7) << 28 | \ ((r) & 0xFFF) << 16 | \ ((t) & 0xFFF)) /* HCON register defines */ #define DMA_INTERFACE_IDMA (0x0) #define DMA_INTERFACE_DWDMA (0x1) #define DMA_INTERFACE_GDMA (0x2) #define DMA_INTERFACE_NODMA (0x3) #define SDMMC_GET_TRANS_MODE(x) (((x)>>16) & 0x3) #define SDMMC_GET_SLOT_NUM(x) ((((x)>>1) & 0x1F) + 1) #define SDMMC_GET_HDATA_WIDTH(x) (((x)>>7) & 0x7) #define SDMMC_GET_ADDR_CONFIG(x) (((x)>>27) & 0x1) /* Internal DMAC interrupt defines */ #define SDMMC_IDMAC_INT_AI BIT(9) #define SDMMC_IDMAC_INT_NI BIT(8) #define SDMMC_IDMAC_INT_CES BIT(5) #define SDMMC_IDMAC_INT_DU BIT(4) #define SDMMC_IDMAC_INT_FBE BIT(2) #define SDMMC_IDMAC_INT_RI BIT(1) #define SDMMC_IDMAC_INT_TI BIT(0) /* Internal DMAC bus mode bits */ #define SDMMC_IDMAC_ENABLE BIT(7) #define SDMMC_IDMAC_FB BIT(1) #define SDMMC_IDMAC_SWRESET BIT(0) /* H/W reset */ #define SDMMC_RST_HWACTIVE 0x1 /* Version ID register define */ #define SDMMC_GET_VERID(x) ((x) & 0xFFFF) /* Card read threshold */ #define SDMMC_SET_THLD(v, x) (((v) & 0xFFF) << 16 | (x)) #define SDMMC_CARD_WR_THR_EN BIT(2) #define SDMMC_CARD_RD_THR_EN BIT(0) /* UHS-1 register defines */ #define SDMMC_UHS_DDR BIT(16) #define SDMMC_UHS_18V BIT(0) /* DDR register defines */ #define SDMMC_DDR_HS400 BIT(31) /* Enable shift register defines */ #define SDMMC_ENABLE_PHASE BIT(0) /* All ctrl reset bits */ #define SDMMC_CTRL_ALL_RESET_FLAGS \ (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET) /* FIFO register access macros. These should not change the data endian-ness * as they are written to memory to be dealt with by the upper layers */ #define mci_fifo_readw(__reg) __raw_readw(__reg) #define mci_fifo_readl(__reg) __raw_readl(__reg) #define mci_fifo_readq(__reg) __raw_readq(__reg) #define mci_fifo_writew(__value, __reg) __raw_writew(__reg, __value) #define mci_fifo_writel(__value, __reg) __raw_writel(__reg, __value) #define mci_fifo_writeq(__value, __reg) __raw_writeq(__reg, __value) /* Register access macros */ #define mci_readl(dev, reg) \ readl_relaxed((dev)->regs + SDMMC_##reg) #define mci_writel(dev, reg, value) \ writel_relaxed((value), (dev)->regs + SDMMC_##reg) /* 16-bit FIFO access macros */ #define mci_readw(dev, reg) \ readw_relaxed((dev)->regs + SDMMC_##reg) #define mci_writew(dev, reg, value) \ writew_relaxed((value), (dev)->regs + SDMMC_##reg) /* 64-bit FIFO access macros */ #ifdef readq #define mci_readq(dev, reg) \ readq_relaxed((dev)->regs + SDMMC_##reg) #define mci_writeq(dev, reg, value) \ writeq_relaxed((value), (dev)->regs + SDMMC_##reg) #else /* * Dummy readq implementation for architectures that don't define it. * * We would assume that none of these architectures would configure * the IP block with a 64bit FIFO width, so this code will never be * executed on those machines. Defining these macros here keeps the * rest of the code free from ifdefs. */ #define mci_readq(dev, reg) \ (*(volatile u64 __force *)((dev)->regs + SDMMC_##reg)) #define mci_writeq(dev, reg, value) \ (*(volatile u64 __force *)((dev)->regs + SDMMC_##reg) = (value)) #define __raw_writeq(__value, __reg) \ (*(volatile u64 __force *)(__reg) = (__value)) #define __raw_readq(__reg) (*(volatile u64 __force *)(__reg)) #endif extern int dw_mci_probe(struct dw_mci *host); extern void dw_mci_remove(struct dw_mci *host); #ifdef CONFIG_PM extern int dw_mci_runtime_suspend(struct device *device); extern int dw_mci_runtime_resume(struct device *device); #endif /** * struct dw_mci_slot - MMC slot state * @mmc: The mmc_host representing this slot. * @host: The MMC controller this slot is using. * @ctype: Card type for this slot. * @mrq: mmc_request currently being processed or waiting to be * processed, or NULL when the slot is idle. * @queue_node: List node for placing this node in the @queue list of * &struct dw_mci. * @clock: Clock rate configured by set_ios(). Protected by host->lock. * @__clk_old: The last clock value that was requested from core. * Keeping track of this helps us to avoid spamming the console. * @flags: Random state bits associated with the slot. * @id: Number of this slot. * @sdio_id: Number of this slot in the SDIO interrupt registers. */ struct dw_mci_slot { struct mmc_host *mmc; struct dw_mci *host; u32 ctype; struct mmc_request *mrq; struct list_head queue_node; unsigned int clock; unsigned int __clk_old; unsigned long flags; #define DW_MMC_CARD_PRESENT 0 #define DW_MMC_CARD_NEED_INIT 1 #define DW_MMC_CARD_NO_LOW_PWR 2 #define DW_MMC_CARD_NO_USE_HOLD 3 #define DW_MMC_CARD_NEEDS_POLL 4 int id; int sdio_id; }; /** * dw_mci driver data - dw-mshc implementation specific driver data. * @caps: mmc subsystem specified capabilities of the controller(s). * @num_caps: number of capabilities specified by @caps. * @init: early implementation specific initialization. * @set_ios: handle bus specific extensions. * @parse_dt: parse implementation specific device tree properties. * @execute_tuning: implementation specific tuning procedure. * * Provide controller implementation specific extensions. The usage of this * data structure is fully optional and usage of each member in this structure * is optional as well. */ struct dw_mci_drv_data { unsigned long *caps; u32 num_caps; int (*init)(struct dw_mci *host); void (*set_ios)(struct dw_mci *host, struct mmc_ios *ios); int (*parse_dt)(struct dw_mci *host); int (*execute_tuning)(struct dw_mci_slot *slot, u32 opcode); int (*prepare_hs400_tuning)(struct dw_mci *host, struct mmc_ios *ios); int (*switch_voltage)(struct mmc_host *mmc, struct mmc_ios *ios); }; #endif /* _DW_MMC_H_ */
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