drivers/mmc/host/tmio_mmc.h - kernel/quantenna - Git at Google

 /*
  * linux/drivers/mmc/host/tmio_mmc.h
  *
  * Copyright (C) 2016 Sang Engineering, Wolfram Sang
  * Copyright (C) 2015-16 Renesas Electronics Corporation
  * Copyright (C) 2007 Ian Molton
  * Copyright (C) 2004 Ian Molton
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * Driver for the MMC / SD / SDIO cell found in:
  *
  * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
  */

 #ifndef TMIO_MMC_H
 #define TMIO_MMC_H

 #include <linux/dmaengine.h>
 #include <linux/highmem.h>
 #include <linux/mutex.h>
 #include <linux/pagemap.h>
 #include <linux/scatterlist.h>
 #include <linux/spinlock.h>

 #define CTL_SD_CMD 0x00
 #define CTL_ARG_REG 0x04
 #define CTL_STOP_INTERNAL_ACTION 0x08
 #define CTL_XFER_BLK_COUNT 0xa
 #define CTL_RESPONSE 0x0c
 /* driver merges STATUS and following STATUS2 */
 #define CTL_STATUS 0x1c
 /* driver merges IRQ_MASK and following IRQ_MASK2 */
 #define CTL_IRQ_MASK 0x20
 #define CTL_SD_CARD_CLK_CTL 0x24
 #define CTL_SD_XFER_LEN 0x26
 #define CTL_SD_MEM_CARD_OPT 0x28
 #define CTL_SD_ERROR_DETAIL_STATUS 0x2c
 #define CTL_SD_DATA_PORT 0x30
 #define CTL_TRANSACTION_CTL 0x34
 #define CTL_SDIO_STATUS 0x36
 #define CTL_SDIO_IRQ_MASK 0x38
 #define CTL_DMA_ENABLE 0xd8
 #define CTL_RESET_SD 0xe0
 #define CTL_VERSION 0xe2
 #define CTL_SDIO_REGS 0x100
 #define CTL_CLK_AND_WAIT_CTL 0x138
 #define CTL_RESET_SDIO 0x1e0

 /* Definitions for values the CTRL_STATUS register can take. */
 #define TMIO_STAT_CMDRESPEND    BIT(0)
 #define TMIO_STAT_DATAEND       BIT(2)
 #define TMIO_STAT_CARD_REMOVE   BIT(3)
 #define TMIO_STAT_CARD_INSERT   BIT(4)
 #define TMIO_STAT_SIGSTATE      BIT(5)
 #define TMIO_STAT_WRPROTECT     BIT(7)
 #define TMIO_STAT_CARD_REMOVE_A BIT(8)
 #define TMIO_STAT_CARD_INSERT_A BIT(9)
 #define TMIO_STAT_SIGSTATE_A    BIT(10)

 /* These belong technically to CTRL_STATUS2, but the driver merges them */
 #define TMIO_STAT_CMD_IDX_ERR   BIT(16)
 #define TMIO_STAT_CRCFAIL       BIT(17)
 #define TMIO_STAT_STOPBIT_ERR   BIT(18)
 #define TMIO_STAT_DATATIMEOUT   BIT(19)
 #define TMIO_STAT_RXOVERFLOW    BIT(20)
 #define TMIO_STAT_TXUNDERRUN    BIT(21)
 #define TMIO_STAT_CMDTIMEOUT    BIT(22)
 #define TMIO_STAT_DAT0		BIT(23)	/* only known on R-Car so far */
 #define TMIO_STAT_RXRDY         BIT(24)
 #define TMIO_STAT_TXRQ          BIT(25)
 #define TMIO_STAT_ILL_FUNC      BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */
 #define TMIO_STAT_SCLKDIVEN     BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */
 #define TMIO_STAT_CMD_BUSY      BIT(30)
 #define TMIO_STAT_ILL_ACCESS    BIT(31)

 #define	CLK_CTL_DIV_MASK	0xff
 #define	CLK_CTL_SCLKEN		BIT(8)

 #define TMIO_BBS		512		/* Boot block size */

 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
 #define TMIO_SDIO_STAT_IOIRQ	0x0001
 #define TMIO_SDIO_STAT_EXPUB52	0x4000
 #define TMIO_SDIO_STAT_EXWT	0x8000
 #define TMIO_SDIO_MASK_ALL	0xc007

 /* Define some IRQ masks */
 /* This is the mask used at reset by the chip */
 #define TMIO_MASK_ALL           0x837f031d
 #define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
 #define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
 		TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
 #define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)

 struct tmio_mmc_data;
 struct tmio_mmc_host;

 struct tmio_mmc_dma {
 	enum dma_slave_buswidth dma_buswidth;
 	bool (*filter)(struct dma_chan *chan, void *arg);
 	void (*enable)(struct tmio_mmc_host *host, bool enable);
 };

 struct tmio_mmc_host {
 	void __iomem *ctl;
 	struct mmc_command      *cmd;
 	struct mmc_request      *mrq;
 	struct mmc_data         *data;
 	struct mmc_host         *mmc;

 	/* Callbacks for clock / power control */
 	void (*set_pwr)(struct platform_device *host, int state);
 	void (*set_clk_div)(struct platform_device *host, int state);

 	/* pio related stuff */
 	struct scatterlist      *sg_ptr;
 	struct scatterlist      *sg_orig;
 	unsigned int            sg_len;
 	unsigned int            sg_off;
 	unsigned long		bus_shift;

 	struct platform_device *pdev;
 	struct tmio_mmc_data *pdata;
 	struct tmio_mmc_dma	*dma;

 	/* DMA support */
 	bool			force_pio;
 	struct dma_chan		*chan_rx;
 	struct dma_chan		*chan_tx;
 	struct tasklet_struct	dma_complete;
 	struct tasklet_struct	dma_issue;
 	struct scatterlist	bounce_sg;
 	u8			*bounce_buf;

 	/* Track lost interrupts */
 	struct delayed_work	delayed_reset_work;
 	struct work_struct	done;

 	/* Cache */
 	u32			sdcard_irq_mask;
 	u32			sdio_irq_mask;
 	unsigned int		clk_cache;

 	spinlock_t		lock;		/* protect host private data */
 	unsigned long		last_req_ts;
 	struct mutex		ios_lock;	/* protect set_ios() context */
 	bool			native_hotplug;
 	bool			sdio_irq_enabled;

 	int (*write16_hook)(struct tmio_mmc_host *host, int addr);
 	int (*clk_enable)(struct tmio_mmc_host *host);
 	unsigned int (*clk_update)(struct tmio_mmc_host *host,
 				   unsigned int new_clock);
 	void (*clk_disable)(struct tmio_mmc_host *host);
 	int (*multi_io_quirk)(struct mmc_card *card,
 			      unsigned int direction, int blk_size);
 	int (*start_signal_voltage_switch)(struct mmc_host *mmc,
 					   struct mmc_ios *ios);
 };

 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
 void tmio_mmc_host_free(struct tmio_mmc_host *host);
 int tmio_mmc_host_probe(struct tmio_mmc_host *host,
 			struct tmio_mmc_data *pdata);
 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);

 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 irqreturn_t tmio_mmc_irq(int irq, void *devid);

 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 					 unsigned long *flags)
 {
 	local_irq_save(*flags);
 	return kmap_atomic(sg_page(sg)) + sg->offset;
 }

 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
 					  unsigned long *flags, void *virt)
 {
 	kunmap_atomic(virt - sg->offset);
 	local_irq_restore(*flags);
 }

 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
 void tmio_mmc_release_dma(struct tmio_mmc_host *host);
 void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
 #else
 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 			       struct mmc_data *data)
 {
 }

 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 {
 }

 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
 				 struct tmio_mmc_data *pdata)
 {
 	host->chan_tx = NULL;
 	host->chan_rx = NULL;
 }

 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 {
 }

 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 {
 }
 #endif

 #ifdef CONFIG_PM
 int tmio_mmc_host_runtime_suspend(struct device *dev);
 int tmio_mmc_host_runtime_resume(struct device *dev);
 #endif

 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
 {
 	return readw(host->ctl + (addr << host->bus_shift));
 }

 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
 		u16 *buf, int count)
 {
 	readsw(host->ctl + (addr << host->bus_shift), buf, count);
 }

 static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int addr)
 {
 	return readw(host->ctl + (addr << host->bus_shift)) |
 	       readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
 }

 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
 {
 	/* If there is a hook and it returns non-zero then there
 	 * is an error and the write should be skipped
 	 */
 	if (host->write16_hook && host->write16_hook(host, addr))
 		return;
 	writew(val, host->ctl + (addr << host->bus_shift));
 }

 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
 		u16 *buf, int count)
 {
 	writesw(host->ctl + (addr << host->bus_shift), buf, count);
 }

 static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int addr, u32 val)
 {
 	writew(val, host->ctl + (addr << host->bus_shift));
 	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 }

 #endif
	/*
	* linux/drivers/mmc/host/tmio_mmc.h
	*
	* Copyright (C) 2016 Sang Engineering, Wolfram Sang
	* Copyright (C) 2015-16 Renesas Electronics Corporation
	* Copyright (C) 2007 Ian Molton
	* Copyright (C) 2004 Ian Molton
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* Driver for the MMC / SD / SDIO cell found in:
	*
	* TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
	*/

	#ifndef TMIO_MMC_H
	#define TMIO_MMC_H

	#include <linux/dmaengine.h>
	#include <linux/highmem.h>
	#include <linux/mutex.h>
	#include <linux/pagemap.h>
	#include <linux/scatterlist.h>
	#include <linux/spinlock.h>

	#define CTL_SD_CMD 0x00
	#define CTL_ARG_REG 0x04
	#define CTL_STOP_INTERNAL_ACTION 0x08
	#define CTL_XFER_BLK_COUNT 0xa
	#define CTL_RESPONSE 0x0c
	/* driver merges STATUS and following STATUS2 */
	#define CTL_STATUS 0x1c
	/* driver merges IRQ_MASK and following IRQ_MASK2 */
	#define CTL_IRQ_MASK 0x20
	#define CTL_SD_CARD_CLK_CTL 0x24
	#define CTL_SD_XFER_LEN 0x26
	#define CTL_SD_MEM_CARD_OPT 0x28
	#define CTL_SD_ERROR_DETAIL_STATUS 0x2c
	#define CTL_SD_DATA_PORT 0x30
	#define CTL_TRANSACTION_CTL 0x34
	#define CTL_SDIO_STATUS 0x36
	#define CTL_SDIO_IRQ_MASK 0x38
	#define CTL_DMA_ENABLE 0xd8
	#define CTL_RESET_SD 0xe0
	#define CTL_VERSION 0xe2
	#define CTL_SDIO_REGS 0x100
	#define CTL_CLK_AND_WAIT_CTL 0x138
	#define CTL_RESET_SDIO 0x1e0

	/* Definitions for values the CTRL_STATUS register can take. */
	#define TMIO_STAT_CMDRESPEND BIT(0)
	#define TMIO_STAT_DATAEND BIT(2)
	#define TMIO_STAT_CARD_REMOVE BIT(3)
	#define TMIO_STAT_CARD_INSERT BIT(4)
	#define TMIO_STAT_SIGSTATE BIT(5)
	#define TMIO_STAT_WRPROTECT BIT(7)
	#define TMIO_STAT_CARD_REMOVE_A BIT(8)
	#define TMIO_STAT_CARD_INSERT_A BIT(9)
	#define TMIO_STAT_SIGSTATE_A BIT(10)

	/* These belong technically to CTRL_STATUS2, but the driver merges them */
	#define TMIO_STAT_CMD_IDX_ERR BIT(16)
	#define TMIO_STAT_CRCFAIL BIT(17)
	#define TMIO_STAT_STOPBIT_ERR BIT(18)
	#define TMIO_STAT_DATATIMEOUT BIT(19)
	#define TMIO_STAT_RXOVERFLOW BIT(20)
	#define TMIO_STAT_TXUNDERRUN BIT(21)
	#define TMIO_STAT_CMDTIMEOUT BIT(22)
	#define TMIO_STAT_DAT0 BIT(23) /* only known on R-Car so far */
	#define TMIO_STAT_RXRDY BIT(24)
	#define TMIO_STAT_TXRQ BIT(25)
	#define TMIO_STAT_ILL_FUNC BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */
	#define TMIO_STAT_SCLKDIVEN BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */
	#define TMIO_STAT_CMD_BUSY BIT(30)
	#define TMIO_STAT_ILL_ACCESS BIT(31)

	#define CLK_CTL_DIV_MASK 0xff
	#define CLK_CTL_SCLKEN BIT(8)

	#define TMIO_BBS 512 /* Boot block size */

	/* Definitions for values the CTRL_SDIO_STATUS register can take. */
	#define TMIO_SDIO_STAT_IOIRQ 0x0001
	#define TMIO_SDIO_STAT_EXPUB52 0x4000
	#define TMIO_SDIO_STAT_EXWT 0x8000
	#define TMIO_SDIO_MASK_ALL 0xc007

	/* Define some IRQ masks */
	/* This is the mask used at reset by the chip */
	#define TMIO_MASK_ALL 0x837f031d
	#define TMIO_MASK_READOP (TMIO_STAT_RXRDY \| TMIO_STAT_DATAEND)
	#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ \| TMIO_STAT_DATAEND)
	#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND \| TMIO_STAT_CMDTIMEOUT \| \
	TMIO_STAT_CARD_REMOVE \| TMIO_STAT_CARD_INSERT)
	#define TMIO_MASK_IRQ (TMIO_MASK_READOP \| TMIO_MASK_WRITEOP \| TMIO_MASK_CMD)

	struct tmio_mmc_data;
	struct tmio_mmc_host;

	struct tmio_mmc_dma {
	enum dma_slave_buswidth dma_buswidth;
	bool (filter)(struct dma_chan chan, void *arg);
	void (enable)(struct tmio_mmc_host host, bool enable);
	};

	struct tmio_mmc_host {
	void __iomem *ctl;
	struct mmc_command *cmd;
	struct mmc_request *mrq;
	struct mmc_data *data;
	struct mmc_host *mmc;

	/* Callbacks for clock / power control */
	void (set_pwr)(struct platform_device host, int state);
	void (set_clk_div)(struct platform_device host, int state);

	/* pio related stuff */
	struct scatterlist *sg_ptr;
	struct scatterlist *sg_orig;
	unsigned int sg_len;
	unsigned int sg_off;
	unsigned long bus_shift;

	struct platform_device *pdev;
	struct tmio_mmc_data *pdata;
	struct tmio_mmc_dma *dma;

	/* DMA support */
	bool force_pio;
	struct dma_chan *chan_rx;
	struct dma_chan *chan_tx;
	struct tasklet_struct dma_complete;
	struct tasklet_struct dma_issue;
	struct scatterlist bounce_sg;
	u8 *bounce_buf;

	/* Track lost interrupts */
	struct delayed_work delayed_reset_work;
	struct work_struct done;

	/* Cache */
	u32 sdcard_irq_mask;
	u32 sdio_irq_mask;
	unsigned int clk_cache;

	spinlock_t lock; /* protect host private data */
	unsigned long last_req_ts;
	struct mutex ios_lock; /* protect set_ios() context */
	bool native_hotplug;
	bool sdio_irq_enabled;

	int (write16_hook)(struct tmio_mmc_host host, int addr);
	int (clk_enable)(struct tmio_mmc_host host);
	unsigned int (clk_update)(struct tmio_mmc_host host,
	unsigned int new_clock);
	void (clk_disable)(struct tmio_mmc_host host);
	int (multi_io_quirk)(struct mmc_card card,
	unsigned int direction, int blk_size);
	int (start_signal_voltage_switch)(struct mmc_host mmc,
	struct mmc_ios *ios);
	};

	struct tmio_mmc_host tmio_mmc_host_alloc(struct platform_device pdev);
	void tmio_mmc_host_free(struct tmio_mmc_host *host);
	int tmio_mmc_host_probe(struct tmio_mmc_host *host,
	struct tmio_mmc_data *pdata);
	void tmio_mmc_host_remove(struct tmio_mmc_host *host);
	void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);

	void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
	void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
	irqreturn_t tmio_mmc_irq(int irq, void *devid);

	static inline char tmio_mmc_kmap_atomic(struct scatterlist sg,
	unsigned long *flags)
	{
	local_irq_save(*flags);
	return kmap_atomic(sg_page(sg)) + sg->offset;
	}

	static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
	unsigned long flags, void virt)
	{
	kunmap_atomic(virt - sg->offset);
	local_irq_restore(*flags);
	}

	#if defined(CONFIG_MMC_SDHI) \|\| defined(CONFIG_MMC_SDHI_MODULE)
	void tmio_mmc_start_dma(struct tmio_mmc_host host, struct mmc_data data);
	void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
	void tmio_mmc_request_dma(struct tmio_mmc_host host, struct tmio_mmc_data pdata);
	void tmio_mmc_release_dma(struct tmio_mmc_host *host);
	void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
	#else
	static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
	struct mmc_data *data)
	{
	}

	static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
	{
	}

	static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
	struct tmio_mmc_data *pdata)
	{
	host->chan_tx = NULL;
	host->chan_rx = NULL;
	}

	static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
	{
	}

	static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
	{
	}
	#endif

	#ifdef CONFIG_PM
	int tmio_mmc_host_runtime_suspend(struct device *dev);
	int tmio_mmc_host_runtime_resume(struct device *dev);
	#endif

	static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
	{
	return readw(host->ctl + (addr << host->bus_shift));
	}

	static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
	u16 *buf, int count)
	{
	readsw(host->ctl + (addr << host->bus_shift), buf, count);
	}

	static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int addr)
	{
	return readw(host->ctl + (addr << host->bus_shift)) \|
	readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
	}

	static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
	{
	/* If there is a hook and it returns non-zero then there
	* is an error and the write should be skipped
	*/
	if (host->write16_hook && host->write16_hook(host, addr))
	return;
	writew(val, host->ctl + (addr << host->bus_shift));
	}

	static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
	u16 *buf, int count)
	{
	writesw(host->ctl + (addr << host->bus_shift), buf, count);
	}

	static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int addr, u32 val)
	{
	writew(val, host->ctl + (addr << host->bus_shift));
	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
	}

	#endif