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/*
* linux/drivers/mmc/host/tmio_mmc.h
*
* 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/highmem.h>
#include <linux/mmc/tmio.h>
#include <linux/mutex.h>
#include <linux/pagemap.h>
#include <linux/scatterlist.h>
#include <linux/spinlock.h>
/* 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;
/*
* We differentiate between the following 3 power states:
* 1. card slot powered off, controller stopped. This is used, when either there
* is no card in the slot, or the card really has to be powered down.
* 2. card slot powered on, controller stopped. This is used, when a card is in
* the slot, but no activity is currently taking place. This is a power-
* saving mode with card-state preserved. This state can be entered, e.g.
* when MMC clock-gating is used.
* 3. card slot powered on, controller running. This is the actual active state.
*/
enum tmio_mmc_power {
TMIO_MMC_OFF_STOP, /* card power off, controller stopped */
TMIO_MMC_ON_STOP, /* card power on, controller stopped */
TMIO_MMC_ON_RUN, /* card power on, controller running */
};
struct tmio_mmc_host {
void __iomem *ctl;
struct mmc_command *cmd;
struct mmc_request *mrq;
struct mmc_data *data;
struct mmc_host *mmc;
/* Controller and card power state */
enum tmio_mmc_power power;
/* 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;
struct platform_device *pdev;
struct tmio_mmc_data *pdata;
/* 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 IRQ mask */
u32 sdcard_irq_mask;
u32 sdio_irq_mask;
spinlock_t lock; /* protect host private data */
unsigned long last_req_ts;
struct mutex ios_lock; /* protect set_ios() context */
bool native_hotplug;
bool resuming;
};
int tmio_mmc_host_probe(struct tmio_mmc_host **host,
struct platform_device *pdev,
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);
irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
irqreturn_t tmio_mmc_sdio_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_suspend(struct device *dev);
int tmio_mmc_host_resume(struct device *dev);
#else
#define tmio_mmc_host_suspend NULL
#define tmio_mmc_host_resume NULL
#endif
int tmio_mmc_host_runtime_suspend(struct device *dev);
int tmio_mmc_host_runtime_resume(struct device *dev);
static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
{
return readw(host->ctl + (addr << host->pdata->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->pdata->bus_shift), buf, count);
}
static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
{
return readw(host->ctl + (addr << host->pdata->bus_shift)) |
readw(host->ctl + ((addr + 2) << host->pdata->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->pdata->write16_hook && host->pdata->write16_hook(host, addr))
return;
writew(val, host->ctl + (addr << host->pdata->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->pdata->bus_shift), buf, count);
}
static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
{
writew(val, host->ctl + (addr << host->pdata->bus_shift));
writew(val >> 16, host->ctl + ((addr + 2) << host->pdata->bus_shift));
}
#endif
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