1 /* 2 * linux/drivers/mmc/host/tmio_mmc.h 3 * 4 * Copyright (C) 2007 Ian Molton 5 * Copyright (C) 2004 Ian Molton 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 * Driver for the MMC / SD / SDIO cell found in: 12 * 13 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 14 */ 15 16 #ifndef TMIO_MMC_H 17 #define TMIO_MMC_H 18 19 #include <linux/highmem.h> 20 #include <linux/mmc/tmio.h> 21 #include <linux/pagemap.h> 22 23 /* Definitions for values the CTRL_SDIO_STATUS register can take. */ 24 #define TMIO_SDIO_STAT_IOIRQ 0x0001 25 #define TMIO_SDIO_STAT_EXPUB52 0x4000 26 #define TMIO_SDIO_STAT_EXWT 0x8000 27 #define TMIO_SDIO_MASK_ALL 0xc007 28 29 /* Define some IRQ masks */ 30 /* This is the mask used at reset by the chip */ 31 #define TMIO_MASK_ALL 0x837f031d 32 #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) 33 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) 34 #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ 35 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) 36 #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) 37 38 struct tmio_mmc_data; 39 40 struct tmio_mmc_host { 41 void __iomem *ctl; 42 unsigned long bus_shift; 43 struct mmc_command *cmd; 44 struct mmc_request *mrq; 45 struct mmc_data *data; 46 struct mmc_host *mmc; 47 int irq; 48 unsigned int sdio_irq_enabled; 49 50 /* Callbacks for clock / power control */ 51 void (*set_pwr)(struct platform_device *host, int state); 52 void (*set_clk_div)(struct platform_device *host, int state); 53 54 /* pio related stuff */ 55 struct scatterlist *sg_ptr; 56 struct scatterlist *sg_orig; 57 unsigned int sg_len; 58 unsigned int sg_off; 59 60 struct platform_device *pdev; 61 struct tmio_mmc_data *pdata; 62 63 /* DMA support */ 64 bool force_pio; 65 struct dma_chan *chan_rx; 66 struct dma_chan *chan_tx; 67 struct tasklet_struct dma_complete; 68 struct tasklet_struct dma_issue; 69 struct scatterlist bounce_sg; 70 u8 *bounce_buf; 71 72 /* Track lost interrupts */ 73 struct delayed_work delayed_reset_work; 74 spinlock_t lock; 75 unsigned long last_req_ts; 76 }; 77 78 int tmio_mmc_host_probe(struct tmio_mmc_host **host, 79 struct platform_device *pdev, 80 struct tmio_mmc_data *pdata); 81 void tmio_mmc_host_remove(struct tmio_mmc_host *host); 82 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); 83 84 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 85 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 86 87 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 88 unsigned long *flags) 89 { 90 local_irq_save(*flags); 91 return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset; 92 } 93 94 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, 95 unsigned long *flags, void *virt) 96 { 97 kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ); 98 local_irq_restore(*flags); 99 } 100 101 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) 102 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); 103 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); 104 void tmio_mmc_release_dma(struct tmio_mmc_host *host); 105 #else 106 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, 107 struct mmc_data *data) 108 { 109 } 110 111 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, 112 struct tmio_mmc_data *pdata) 113 { 114 host->chan_tx = NULL; 115 host->chan_rx = NULL; 116 } 117 118 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) 119 { 120 } 121 #endif 122 123 #endif 124