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 19b6147490SGuennadi Liakhovetski #include <linux/highmem.h> 20cba179aeSSimon Horman #include <linux/mmc/tmio.h> 21b9269fddSGuennadi Liakhovetski #include <linux/mutex.h> 22b6147490SGuennadi Liakhovetski #include <linux/pagemap.h> 236c0cbef6SRafael J. Wysocki #include <linux/scatterlist.h> 24e3de2be7SGuennadi Liakhovetski #include <linux/spinlock.h> 25b6147490SGuennadi Liakhovetski 26b6147490SGuennadi Liakhovetski /* Definitions for values the CTRL_SDIO_STATUS register can take. */ 27b6147490SGuennadi Liakhovetski #define TMIO_SDIO_STAT_IOIRQ 0x0001 28b6147490SGuennadi Liakhovetski #define TMIO_SDIO_STAT_EXPUB52 0x4000 29b6147490SGuennadi Liakhovetski #define TMIO_SDIO_STAT_EXWT 0x8000 30b6147490SGuennadi Liakhovetski #define TMIO_SDIO_MASK_ALL 0xc007 31b6147490SGuennadi Liakhovetski 32b6147490SGuennadi Liakhovetski /* Define some IRQ masks */ 33b6147490SGuennadi Liakhovetski /* This is the mask used at reset by the chip */ 34b6147490SGuennadi Liakhovetski #define TMIO_MASK_ALL 0x837f031d 35b6147490SGuennadi Liakhovetski #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) 36b6147490SGuennadi Liakhovetski #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) 37b6147490SGuennadi Liakhovetski #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ 38b6147490SGuennadi Liakhovetski TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) 39b6147490SGuennadi Liakhovetski #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) 40b6147490SGuennadi Liakhovetski 41b6147490SGuennadi Liakhovetski struct tmio_mmc_data; 42b6147490SGuennadi Liakhovetski 43b6147490SGuennadi Liakhovetski struct tmio_mmc_host { 44b6147490SGuennadi Liakhovetski void __iomem *ctl; 45b6147490SGuennadi Liakhovetski unsigned long bus_shift; 46b6147490SGuennadi Liakhovetski struct mmc_command *cmd; 47b6147490SGuennadi Liakhovetski struct mmc_request *mrq; 48b6147490SGuennadi Liakhovetski struct mmc_data *data; 49b6147490SGuennadi Liakhovetski struct mmc_host *mmc; 50b6147490SGuennadi Liakhovetski unsigned int sdio_irq_enabled; 51b6147490SGuennadi Liakhovetski 52b6147490SGuennadi Liakhovetski /* Callbacks for clock / power control */ 53b6147490SGuennadi Liakhovetski void (*set_pwr)(struct platform_device *host, int state); 54b6147490SGuennadi Liakhovetski void (*set_clk_div)(struct platform_device *host, int state); 55b6147490SGuennadi Liakhovetski 56e6ee7182SGuennadi Liakhovetski int pm_error; 5771d111cdSGuennadi Liakhovetski /* recognise system-wide suspend in runtime PM methods */ 5871d111cdSGuennadi Liakhovetski bool pm_global; 59e6ee7182SGuennadi Liakhovetski 60b6147490SGuennadi Liakhovetski /* pio related stuff */ 61b6147490SGuennadi Liakhovetski struct scatterlist *sg_ptr; 62b6147490SGuennadi Liakhovetski struct scatterlist *sg_orig; 63b6147490SGuennadi Liakhovetski unsigned int sg_len; 64b6147490SGuennadi Liakhovetski unsigned int sg_off; 65b6147490SGuennadi Liakhovetski 66b6147490SGuennadi Liakhovetski struct platform_device *pdev; 67b6147490SGuennadi Liakhovetski struct tmio_mmc_data *pdata; 68b6147490SGuennadi Liakhovetski 69b6147490SGuennadi Liakhovetski /* DMA support */ 70b6147490SGuennadi Liakhovetski bool force_pio; 71b6147490SGuennadi Liakhovetski struct dma_chan *chan_rx; 72b6147490SGuennadi Liakhovetski struct dma_chan *chan_tx; 73b6147490SGuennadi Liakhovetski struct tasklet_struct dma_complete; 74b6147490SGuennadi Liakhovetski struct tasklet_struct dma_issue; 75b6147490SGuennadi Liakhovetski struct scatterlist bounce_sg; 76b6147490SGuennadi Liakhovetski u8 *bounce_buf; 77b6147490SGuennadi Liakhovetski 78b6147490SGuennadi Liakhovetski /* Track lost interrupts */ 79b6147490SGuennadi Liakhovetski struct delayed_work delayed_reset_work; 80b9269fddSGuennadi Liakhovetski struct work_struct done; 81b9269fddSGuennadi Liakhovetski 8254680fe7SSimon Horman /* Cache IRQ mask */ 8354680fe7SSimon Horman u32 sdcard_irq_mask; 8454680fe7SSimon Horman u32 sdio_irq_mask; 8554680fe7SSimon Horman 86b9269fddSGuennadi Liakhovetski spinlock_t lock; /* protect host private data */ 87b6147490SGuennadi Liakhovetski unsigned long last_req_ts; 88b9269fddSGuennadi Liakhovetski struct mutex ios_lock; /* protect set_ios() context */ 89b6147490SGuennadi Liakhovetski }; 90b6147490SGuennadi Liakhovetski 91b6147490SGuennadi Liakhovetski int tmio_mmc_host_probe(struct tmio_mmc_host **host, 92b6147490SGuennadi Liakhovetski struct platform_device *pdev, 93b6147490SGuennadi Liakhovetski struct tmio_mmc_data *pdata); 94b6147490SGuennadi Liakhovetski void tmio_mmc_host_remove(struct tmio_mmc_host *host); 95b6147490SGuennadi Liakhovetski void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); 96b6147490SGuennadi Liakhovetski 97b6147490SGuennadi Liakhovetski void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 98b6147490SGuennadi Liakhovetski void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 998e7bfdb3SMagnus Damm irqreturn_t tmio_mmc_irq(int irq, void *devid); 1007729c7a2SSimon Horman irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid); 1017729c7a2SSimon Horman irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid); 1027729c7a2SSimon Horman irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid); 103b6147490SGuennadi Liakhovetski 104b6147490SGuennadi Liakhovetski static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 105b6147490SGuennadi Liakhovetski unsigned long *flags) 106b6147490SGuennadi Liakhovetski { 107b6147490SGuennadi Liakhovetski local_irq_save(*flags); 108482fce99SCong Wang return kmap_atomic(sg_page(sg)) + sg->offset; 109b6147490SGuennadi Liakhovetski } 110b6147490SGuennadi Liakhovetski 111b6147490SGuennadi Liakhovetski static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, 112b6147490SGuennadi Liakhovetski unsigned long *flags, void *virt) 113b6147490SGuennadi Liakhovetski { 114482fce99SCong Wang kunmap_atomic(virt - sg->offset); 115b6147490SGuennadi Liakhovetski local_irq_restore(*flags); 116b6147490SGuennadi Liakhovetski } 117b6147490SGuennadi Liakhovetski 11842051e8aSGuennadi Liakhovetski #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) 119b6147490SGuennadi Liakhovetski void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); 120162f43e3SGuennadi Liakhovetski void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); 121b6147490SGuennadi Liakhovetski void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); 122b6147490SGuennadi Liakhovetski void tmio_mmc_release_dma(struct tmio_mmc_host *host); 123e3de2be7SGuennadi Liakhovetski void tmio_mmc_abort_dma(struct tmio_mmc_host *host); 124b6147490SGuennadi Liakhovetski #else 125b6147490SGuennadi Liakhovetski static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, 126b6147490SGuennadi Liakhovetski struct mmc_data *data) 127b6147490SGuennadi Liakhovetski { 128b6147490SGuennadi Liakhovetski } 129b6147490SGuennadi Liakhovetski 130162f43e3SGuennadi Liakhovetski static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) 131162f43e3SGuennadi Liakhovetski { 132162f43e3SGuennadi Liakhovetski } 133162f43e3SGuennadi Liakhovetski 134b6147490SGuennadi Liakhovetski static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, 135b6147490SGuennadi Liakhovetski struct tmio_mmc_data *pdata) 136b6147490SGuennadi Liakhovetski { 137b6147490SGuennadi Liakhovetski host->chan_tx = NULL; 138b6147490SGuennadi Liakhovetski host->chan_rx = NULL; 139b6147490SGuennadi Liakhovetski } 140b6147490SGuennadi Liakhovetski 141b6147490SGuennadi Liakhovetski static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) 142b6147490SGuennadi Liakhovetski { 143b6147490SGuennadi Liakhovetski } 144e3de2be7SGuennadi Liakhovetski 145e3de2be7SGuennadi Liakhovetski static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) 146e3de2be7SGuennadi Liakhovetski { 147e3de2be7SGuennadi Liakhovetski } 148b6147490SGuennadi Liakhovetski #endif 149b6147490SGuennadi Liakhovetski 150e6ee7182SGuennadi Liakhovetski #ifdef CONFIG_PM 151e6ee7182SGuennadi Liakhovetski int tmio_mmc_host_suspend(struct device *dev); 152e6ee7182SGuennadi Liakhovetski int tmio_mmc_host_resume(struct device *dev); 153e6ee7182SGuennadi Liakhovetski #else 154e6ee7182SGuennadi Liakhovetski #define tmio_mmc_host_suspend NULL 155e6ee7182SGuennadi Liakhovetski #define tmio_mmc_host_resume NULL 156e6ee7182SGuennadi Liakhovetski #endif 157e6ee7182SGuennadi Liakhovetski 1587311bef0SGuennadi Liakhovetski int tmio_mmc_host_runtime_suspend(struct device *dev); 1597311bef0SGuennadi Liakhovetski int tmio_mmc_host_runtime_resume(struct device *dev); 1607311bef0SGuennadi Liakhovetski 161a11862d3SSimon Horman static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) 162a11862d3SSimon Horman { 163a11862d3SSimon Horman return readw(host->ctl + (addr << host->bus_shift)); 164a11862d3SSimon Horman } 165a11862d3SSimon Horman 166a11862d3SSimon Horman static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, 167a11862d3SSimon Horman u16 *buf, int count) 168a11862d3SSimon Horman { 169a11862d3SSimon Horman readsw(host->ctl + (addr << host->bus_shift), buf, count); 170a11862d3SSimon Horman } 171a11862d3SSimon Horman 172a11862d3SSimon Horman static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) 173a11862d3SSimon Horman { 174a11862d3SSimon Horman return readw(host->ctl + (addr << host->bus_shift)) | 175a11862d3SSimon Horman readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; 176a11862d3SSimon Horman } 177a11862d3SSimon Horman 178a11862d3SSimon Horman static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) 179a11862d3SSimon Horman { 180973ed3afSSimon Horman /* If there is a hook and it returns non-zero then there 181973ed3afSSimon Horman * is an error and the write should be skipped 182973ed3afSSimon Horman */ 183973ed3afSSimon Horman if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr)) 184973ed3afSSimon Horman return; 185a11862d3SSimon Horman writew(val, host->ctl + (addr << host->bus_shift)); 186a11862d3SSimon Horman } 187a11862d3SSimon Horman 188a11862d3SSimon Horman static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, 189a11862d3SSimon Horman u16 *buf, int count) 190a11862d3SSimon Horman { 191a11862d3SSimon Horman writesw(host->ctl + (addr << host->bus_shift), buf, count); 192a11862d3SSimon Horman } 193a11862d3SSimon Horman 194a11862d3SSimon Horman static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) 195a11862d3SSimon Horman { 196a11862d3SSimon Horman writew(val, host->ctl + (addr << host->bus_shift)); 197a11862d3SSimon Horman writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); 198a11862d3SSimon Horman } 199a11862d3SSimon Horman 200a11862d3SSimon Horman 201b6147490SGuennadi Liakhovetski #endif 202