1b6147490SGuennadi Liakhovetski /* 2b6147490SGuennadi Liakhovetski * linux/drivers/mmc/host/tmio_mmc.h 3b6147490SGuennadi Liakhovetski * 4b6147490SGuennadi Liakhovetski * Copyright (C) 2007 Ian Molton 5b6147490SGuennadi Liakhovetski * Copyright (C) 2004 Ian Molton 6b6147490SGuennadi Liakhovetski * 7b6147490SGuennadi Liakhovetski * This program is free software; you can redistribute it and/or modify 8b6147490SGuennadi Liakhovetski * it under the terms of the GNU General Public License version 2 as 9b6147490SGuennadi Liakhovetski * published by the Free Software Foundation. 10b6147490SGuennadi Liakhovetski * 11b6147490SGuennadi Liakhovetski * Driver for the MMC / SD / SDIO cell found in: 12b6147490SGuennadi Liakhovetski * 13b6147490SGuennadi Liakhovetski * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 14b6147490SGuennadi Liakhovetski */ 15b6147490SGuennadi Liakhovetski 16b6147490SGuennadi Liakhovetski #ifndef TMIO_MMC_H 17b6147490SGuennadi Liakhovetski #define TMIO_MMC_H 18b6147490SGuennadi Liakhovetski 19361936efSKuninori Morimoto #include <linux/dmaengine.h> 20b6147490SGuennadi Liakhovetski #include <linux/highmem.h> 21cba179aeSSimon Horman #include <linux/mmc/tmio.h> 22b9269fddSGuennadi Liakhovetski #include <linux/mutex.h> 23b6147490SGuennadi Liakhovetski #include <linux/pagemap.h> 246c0cbef6SRafael J. Wysocki #include <linux/scatterlist.h> 25e3de2be7SGuennadi Liakhovetski #include <linux/spinlock.h> 26b6147490SGuennadi Liakhovetski 27b6147490SGuennadi Liakhovetski /* Definitions for values the CTRL_SDIO_STATUS register can take. */ 28b6147490SGuennadi Liakhovetski #define TMIO_SDIO_STAT_IOIRQ 0x0001 29b6147490SGuennadi Liakhovetski #define TMIO_SDIO_STAT_EXPUB52 0x4000 30b6147490SGuennadi Liakhovetski #define TMIO_SDIO_STAT_EXWT 0x8000 31b6147490SGuennadi Liakhovetski #define TMIO_SDIO_MASK_ALL 0xc007 32b6147490SGuennadi Liakhovetski 33b6147490SGuennadi Liakhovetski /* Define some IRQ masks */ 34b6147490SGuennadi Liakhovetski /* This is the mask used at reset by the chip */ 35b6147490SGuennadi Liakhovetski #define TMIO_MASK_ALL 0x837f031d 36b6147490SGuennadi Liakhovetski #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) 37b6147490SGuennadi Liakhovetski #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) 38b6147490SGuennadi Liakhovetski #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ 39b6147490SGuennadi Liakhovetski TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) 40b6147490SGuennadi Liakhovetski #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) 41b6147490SGuennadi Liakhovetski 42b6147490SGuennadi Liakhovetski struct tmio_mmc_data; 435add2acaSKuninori Morimoto struct tmio_mmc_host; 44b6147490SGuennadi Liakhovetski 457ecc09baSKuninori Morimoto struct tmio_mmc_dma { 46361936efSKuninori Morimoto enum dma_slave_buswidth dma_buswidth; 477ecc09baSKuninori Morimoto bool (*filter)(struct dma_chan *chan, void *arg); 485add2acaSKuninori Morimoto void (*enable)(struct tmio_mmc_host *host, bool enable); 497ecc09baSKuninori Morimoto }; 507ecc09baSKuninori Morimoto 51b6147490SGuennadi Liakhovetski struct tmio_mmc_host { 52b6147490SGuennadi Liakhovetski void __iomem *ctl; 53b6147490SGuennadi Liakhovetski struct mmc_command *cmd; 54b6147490SGuennadi Liakhovetski struct mmc_request *mrq; 55b6147490SGuennadi Liakhovetski struct mmc_data *data; 56b6147490SGuennadi Liakhovetski struct mmc_host *mmc; 57b6147490SGuennadi Liakhovetski 58b6147490SGuennadi Liakhovetski /* Callbacks for clock / power control */ 59b6147490SGuennadi Liakhovetski void (*set_pwr)(struct platform_device *host, int state); 60b6147490SGuennadi Liakhovetski void (*set_clk_div)(struct platform_device *host, int state); 61b6147490SGuennadi Liakhovetski 62b6147490SGuennadi Liakhovetski /* pio related stuff */ 63b6147490SGuennadi Liakhovetski struct scatterlist *sg_ptr; 64b6147490SGuennadi Liakhovetski struct scatterlist *sg_orig; 65b6147490SGuennadi Liakhovetski unsigned int sg_len; 66b6147490SGuennadi Liakhovetski unsigned int sg_off; 677445bf9eSKuninori Morimoto unsigned long bus_shift; 68b6147490SGuennadi Liakhovetski 69b6147490SGuennadi Liakhovetski struct platform_device *pdev; 70b6147490SGuennadi Liakhovetski struct tmio_mmc_data *pdata; 717ecc09baSKuninori Morimoto struct tmio_mmc_dma *dma; 72b6147490SGuennadi Liakhovetski 73b6147490SGuennadi Liakhovetski /* DMA support */ 74b6147490SGuennadi Liakhovetski bool force_pio; 75b6147490SGuennadi Liakhovetski struct dma_chan *chan_rx; 76b6147490SGuennadi Liakhovetski struct dma_chan *chan_tx; 77b6147490SGuennadi Liakhovetski struct tasklet_struct dma_complete; 78b6147490SGuennadi Liakhovetski struct tasklet_struct dma_issue; 79b6147490SGuennadi Liakhovetski struct scatterlist bounce_sg; 80b6147490SGuennadi Liakhovetski u8 *bounce_buf; 81b6147490SGuennadi Liakhovetski 82b6147490SGuennadi Liakhovetski /* Track lost interrupts */ 83b6147490SGuennadi Liakhovetski struct delayed_work delayed_reset_work; 84b9269fddSGuennadi Liakhovetski struct work_struct done; 85b9269fddSGuennadi Liakhovetski 86ae12d250SUlf Hansson /* Cache */ 8754680fe7SSimon Horman u32 sdcard_irq_mask; 8854680fe7SSimon Horman u32 sdio_irq_mask; 89ae12d250SUlf Hansson unsigned int clk_cache; 9054680fe7SSimon Horman 91b9269fddSGuennadi Liakhovetski spinlock_t lock; /* protect host private data */ 92b6147490SGuennadi Liakhovetski unsigned long last_req_ts; 93b9269fddSGuennadi Liakhovetski struct mutex ios_lock; /* protect set_ios() context */ 942b1ac5c2SGuennadi Liakhovetski bool native_hotplug; 957501c431SUlf Hansson bool sdio_irq_enabled; 96dfe9a229SKuninori Morimoto 97dfe9a229SKuninori Morimoto int (*write16_hook)(struct tmio_mmc_host *host, int addr); 980ea28210SBen Hutchings int (*clk_enable)(struct tmio_mmc_host *host); 990ea28210SBen Hutchings void (*clk_disable)(struct tmio_mmc_host *host); 10085c02dddSKuninori Morimoto int (*multi_io_quirk)(struct mmc_card *card, 10185c02dddSKuninori Morimoto unsigned int direction, int blk_size); 102b6147490SGuennadi Liakhovetski }; 103b6147490SGuennadi Liakhovetski 10494b110afSKuninori Morimoto struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev); 10594b110afSKuninori Morimoto void tmio_mmc_host_free(struct tmio_mmc_host *host); 10694b110afSKuninori Morimoto int tmio_mmc_host_probe(struct tmio_mmc_host *host, 107b6147490SGuennadi Liakhovetski struct tmio_mmc_data *pdata); 108b6147490SGuennadi Liakhovetski void tmio_mmc_host_remove(struct tmio_mmc_host *host); 109b6147490SGuennadi Liakhovetski void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); 110b6147490SGuennadi Liakhovetski 111b6147490SGuennadi Liakhovetski void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 112b6147490SGuennadi Liakhovetski void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 1138e7bfdb3SMagnus Damm irqreturn_t tmio_mmc_irq(int irq, void *devid); 1147729c7a2SSimon Horman irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid); 1157729c7a2SSimon Horman irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid); 1167729c7a2SSimon Horman irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid); 117b6147490SGuennadi Liakhovetski 118b6147490SGuennadi Liakhovetski static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 119b6147490SGuennadi Liakhovetski unsigned long *flags) 120b6147490SGuennadi Liakhovetski { 121b6147490SGuennadi Liakhovetski local_irq_save(*flags); 122482fce99SCong Wang return kmap_atomic(sg_page(sg)) + sg->offset; 123b6147490SGuennadi Liakhovetski } 124b6147490SGuennadi Liakhovetski 125b6147490SGuennadi Liakhovetski static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, 126b6147490SGuennadi Liakhovetski unsigned long *flags, void *virt) 127b6147490SGuennadi Liakhovetski { 128482fce99SCong Wang kunmap_atomic(virt - sg->offset); 129b6147490SGuennadi Liakhovetski local_irq_restore(*flags); 130b6147490SGuennadi Liakhovetski } 131b6147490SGuennadi Liakhovetski 13242051e8aSGuennadi Liakhovetski #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) 133b6147490SGuennadi Liakhovetski void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); 134162f43e3SGuennadi Liakhovetski void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); 135b6147490SGuennadi Liakhovetski void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); 136b6147490SGuennadi Liakhovetski void tmio_mmc_release_dma(struct tmio_mmc_host *host); 137e3de2be7SGuennadi Liakhovetski void tmio_mmc_abort_dma(struct tmio_mmc_host *host); 138b6147490SGuennadi Liakhovetski #else 139b6147490SGuennadi Liakhovetski static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, 140b6147490SGuennadi Liakhovetski struct mmc_data *data) 141b6147490SGuennadi Liakhovetski { 142b6147490SGuennadi Liakhovetski } 143b6147490SGuennadi Liakhovetski 144162f43e3SGuennadi Liakhovetski static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) 145162f43e3SGuennadi Liakhovetski { 146162f43e3SGuennadi Liakhovetski } 147162f43e3SGuennadi Liakhovetski 148b6147490SGuennadi Liakhovetski static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, 149b6147490SGuennadi Liakhovetski struct tmio_mmc_data *pdata) 150b6147490SGuennadi Liakhovetski { 151b6147490SGuennadi Liakhovetski host->chan_tx = NULL; 152b6147490SGuennadi Liakhovetski host->chan_rx = NULL; 153b6147490SGuennadi Liakhovetski } 154b6147490SGuennadi Liakhovetski 155b6147490SGuennadi Liakhovetski static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) 156b6147490SGuennadi Liakhovetski { 157b6147490SGuennadi Liakhovetski } 158e3de2be7SGuennadi Liakhovetski 159e3de2be7SGuennadi Liakhovetski static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) 160e3de2be7SGuennadi Liakhovetski { 161e3de2be7SGuennadi Liakhovetski } 162b6147490SGuennadi Liakhovetski #endif 163b6147490SGuennadi Liakhovetski 1649ade7dbfSUlf Hansson #ifdef CONFIG_PM 1657311bef0SGuennadi Liakhovetski int tmio_mmc_host_runtime_suspend(struct device *dev); 1667311bef0SGuennadi Liakhovetski int tmio_mmc_host_runtime_resume(struct device *dev); 167710dec95SUlf Hansson #endif 1687311bef0SGuennadi Liakhovetski 169a11862d3SSimon Horman static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) 170a11862d3SSimon Horman { 1717445bf9eSKuninori Morimoto return readw(host->ctl + (addr << host->bus_shift)); 172a11862d3SSimon Horman } 173a11862d3SSimon Horman 174a11862d3SSimon Horman static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, 175a11862d3SSimon Horman u16 *buf, int count) 176a11862d3SSimon Horman { 1777445bf9eSKuninori Morimoto readsw(host->ctl + (addr << host->bus_shift), buf, count); 178a11862d3SSimon Horman } 179a11862d3SSimon Horman 180a11862d3SSimon Horman static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) 181a11862d3SSimon Horman { 1827445bf9eSKuninori Morimoto return readw(host->ctl + (addr << host->bus_shift)) | 1837445bf9eSKuninori Morimoto readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; 184a11862d3SSimon Horman } 185a11862d3SSimon Horman 186a11862d3SSimon Horman static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) 187a11862d3SSimon Horman { 188973ed3afSSimon Horman /* If there is a hook and it returns non-zero then there 189973ed3afSSimon Horman * is an error and the write should be skipped 190973ed3afSSimon Horman */ 191dfe9a229SKuninori Morimoto if (host->write16_hook && host->write16_hook(host, addr)) 192973ed3afSSimon Horman return; 1937445bf9eSKuninori Morimoto writew(val, host->ctl + (addr << host->bus_shift)); 194a11862d3SSimon Horman } 195a11862d3SSimon Horman 196a11862d3SSimon Horman static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, 197a11862d3SSimon Horman u16 *buf, int count) 198a11862d3SSimon Horman { 1997445bf9eSKuninori Morimoto writesw(host->ctl + (addr << host->bus_shift), buf, count); 200a11862d3SSimon Horman } 201a11862d3SSimon Horman 202a11862d3SSimon Horman static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) 203a11862d3SSimon Horman { 2047445bf9eSKuninori Morimoto writew(val, host->ctl + (addr << host->bus_shift)); 2057445bf9eSKuninori Morimoto writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); 206a11862d3SSimon Horman } 207a11862d3SSimon Horman 208a11862d3SSimon Horman 209b6147490SGuennadi Liakhovetski #endif 210