7311bef069
The TMIO MMC controller cannot be powered off to save power, when no card is plugged in, because then it will not be able to detect a new card-insertion event. On some implementations, however, it is possible to switch to using another source to detect card insertion. This patch adds support for such implementations. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/*
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* linux/drivers/mmc/host/tmio_mmc.h
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*
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* Copyright (C) 2007 Ian Molton
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* Copyright (C) 2004 Ian Molton
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Driver for the MMC / SD / SDIO cell found in:
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*
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* TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
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*/
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#ifndef TMIO_MMC_H
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#define TMIO_MMC_H
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#include <linux/highmem.h>
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#include <linux/mmc/tmio.h>
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#include <linux/pagemap.h>
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#include <linux/spinlock.h>
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/* Definitions for values the CTRL_SDIO_STATUS register can take. */
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#define TMIO_SDIO_STAT_IOIRQ 0x0001
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#define TMIO_SDIO_STAT_EXPUB52 0x4000
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#define TMIO_SDIO_STAT_EXWT 0x8000
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#define TMIO_SDIO_MASK_ALL 0xc007
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/* Define some IRQ masks */
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/* This is the mask used at reset by the chip */
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#define TMIO_MASK_ALL 0x837f031d
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#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
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#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
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#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
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TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
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#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
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struct tmio_mmc_data;
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struct tmio_mmc_host {
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void __iomem *ctl;
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unsigned long bus_shift;
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struct mmc_command *cmd;
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struct mmc_request *mrq;
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struct mmc_data *data;
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struct mmc_host *mmc;
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unsigned int sdio_irq_enabled;
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/* Callbacks for clock / power control */
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void (*set_pwr)(struct platform_device *host, int state);
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void (*set_clk_div)(struct platform_device *host, int state);
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int pm_error;
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/* pio related stuff */
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struct scatterlist *sg_ptr;
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struct scatterlist *sg_orig;
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unsigned int sg_len;
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unsigned int sg_off;
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struct platform_device *pdev;
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struct tmio_mmc_data *pdata;
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/* DMA support */
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bool force_pio;
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struct dma_chan *chan_rx;
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struct dma_chan *chan_tx;
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struct tasklet_struct dma_complete;
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struct tasklet_struct dma_issue;
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struct scatterlist bounce_sg;
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u8 *bounce_buf;
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/* Track lost interrupts */
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struct delayed_work delayed_reset_work;
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spinlock_t lock;
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unsigned long last_req_ts;
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};
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int tmio_mmc_host_probe(struct tmio_mmc_host **host,
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struct platform_device *pdev,
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struct tmio_mmc_data *pdata);
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void tmio_mmc_host_remove(struct tmio_mmc_host *host);
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void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
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void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
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void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
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irqreturn_t tmio_mmc_irq(int irq, void *devid);
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static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
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unsigned long *flags)
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{
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local_irq_save(*flags);
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return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
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}
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static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
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unsigned long *flags, void *virt)
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{
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kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
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local_irq_restore(*flags);
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}
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#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
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void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
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void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
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void tmio_mmc_release_dma(struct tmio_mmc_host *host);
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#else
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static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
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struct mmc_data *data)
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{
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}
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static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
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struct tmio_mmc_data *pdata)
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{
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host->chan_tx = NULL;
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host->chan_rx = NULL;
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}
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static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
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{
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}
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#endif
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#ifdef CONFIG_PM
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int tmio_mmc_host_suspend(struct device *dev);
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int tmio_mmc_host_resume(struct device *dev);
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#else
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#define tmio_mmc_host_suspend NULL
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#define tmio_mmc_host_resume NULL
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#endif
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int tmio_mmc_host_runtime_suspend(struct device *dev);
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int tmio_mmc_host_runtime_resume(struct device *dev);
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#endif
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