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/dmaengine.h> 20 #include <linux/highmem.h> 21 #include <linux/mmc/tmio.h> 22 #include <linux/mutex.h> 23 #include <linux/pagemap.h> 24 #include <linux/scatterlist.h> 25 #include <linux/spinlock.h> 26 27 /* Definitions for values the CTRL_SDIO_STATUS register can take. */ 28 #define TMIO_SDIO_STAT_IOIRQ 0x0001 29 #define TMIO_SDIO_STAT_EXPUB52 0x4000 30 #define TMIO_SDIO_STAT_EXWT 0x8000 31 #define TMIO_SDIO_MASK_ALL 0xc007 32 33 /* Define some IRQ masks */ 34 /* This is the mask used at reset by the chip */ 35 #define TMIO_MASK_ALL 0x837f031d 36 #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) 37 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) 38 #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ 39 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) 40 #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) 41 42 struct tmio_mmc_data; 43 struct tmio_mmc_host; 44 45 struct tmio_mmc_dma { 46 enum dma_slave_buswidth dma_buswidth; 47 bool (*filter)(struct dma_chan *chan, void *arg); 48 void (*enable)(struct tmio_mmc_host *host, bool enable); 49 }; 50 51 struct tmio_mmc_host { 52 void __iomem *ctl; 53 struct mmc_command *cmd; 54 struct mmc_request *mrq; 55 struct mmc_data *data; 56 struct mmc_host *mmc; 57 58 /* Callbacks for clock / power control */ 59 void (*set_pwr)(struct platform_device *host, int state); 60 void (*set_clk_div)(struct platform_device *host, int state); 61 62 /* pio related stuff */ 63 struct scatterlist *sg_ptr; 64 struct scatterlist *sg_orig; 65 unsigned int sg_len; 66 unsigned int sg_off; 67 unsigned long bus_shift; 68 69 struct platform_device *pdev; 70 struct tmio_mmc_data *pdata; 71 struct tmio_mmc_dma *dma; 72 73 /* DMA support */ 74 bool force_pio; 75 struct dma_chan *chan_rx; 76 struct dma_chan *chan_tx; 77 struct tasklet_struct dma_complete; 78 struct tasklet_struct dma_issue; 79 struct scatterlist bounce_sg; 80 u8 *bounce_buf; 81 82 /* Track lost interrupts */ 83 struct delayed_work delayed_reset_work; 84 struct work_struct done; 85 86 /* Cache */ 87 u32 sdcard_irq_mask; 88 u32 sdio_irq_mask; 89 unsigned int clk_cache; 90 91 spinlock_t lock; /* protect host private data */ 92 unsigned long last_req_ts; 93 struct mutex ios_lock; /* protect set_ios() context */ 94 bool native_hotplug; 95 bool sdio_irq_enabled; 96 97 int (*write16_hook)(struct tmio_mmc_host *host, int addr); 98 int (*clk_enable)(struct platform_device *pdev, unsigned int *f); 99 void (*clk_disable)(struct platform_device *pdev); 100 int (*multi_io_quirk)(struct mmc_card *card, 101 unsigned int direction, int blk_size); 102 }; 103 104 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev); 105 void tmio_mmc_host_free(struct tmio_mmc_host *host); 106 int tmio_mmc_host_probe(struct tmio_mmc_host *host, 107 struct tmio_mmc_data *pdata); 108 void tmio_mmc_host_remove(struct tmio_mmc_host *host); 109 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); 110 111 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 112 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 113 irqreturn_t tmio_mmc_irq(int irq, void *devid); 114 irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid); 115 irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid); 116 irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid); 117 118 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 119 unsigned long *flags) 120 { 121 local_irq_save(*flags); 122 return kmap_atomic(sg_page(sg)) + sg->offset; 123 } 124 125 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, 126 unsigned long *flags, void *virt) 127 { 128 kunmap_atomic(virt - sg->offset); 129 local_irq_restore(*flags); 130 } 131 132 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) 133 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); 134 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); 135 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); 136 void tmio_mmc_release_dma(struct tmio_mmc_host *host); 137 void tmio_mmc_abort_dma(struct tmio_mmc_host *host); 138 #else 139 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, 140 struct mmc_data *data) 141 { 142 } 143 144 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) 145 { 146 } 147 148 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, 149 struct tmio_mmc_data *pdata) 150 { 151 host->chan_tx = NULL; 152 host->chan_rx = NULL; 153 } 154 155 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) 156 { 157 } 158 159 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) 160 { 161 } 162 #endif 163 164 #ifdef CONFIG_PM 165 int tmio_mmc_host_runtime_suspend(struct device *dev); 166 int tmio_mmc_host_runtime_resume(struct device *dev); 167 #endif 168 169 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) 170 { 171 return readw(host->ctl + (addr << host->bus_shift)); 172 } 173 174 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, 175 u16 *buf, int count) 176 { 177 readsw(host->ctl + (addr << host->bus_shift), buf, count); 178 } 179 180 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) 181 { 182 return readw(host->ctl + (addr << host->bus_shift)) | 183 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; 184 } 185 186 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) 187 { 188 /* If there is a hook and it returns non-zero then there 189 * is an error and the write should be skipped 190 */ 191 if (host->write16_hook && host->write16_hook(host, addr)) 192 return; 193 writew(val, host->ctl + (addr << host->bus_shift)); 194 } 195 196 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, 197 u16 *buf, int count) 198 { 199 writesw(host->ctl + (addr << host->bus_shift), buf, count); 200 } 201 202 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) 203 { 204 writew(val, host->ctl + (addr << host->bus_shift)); 205 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); 206 } 207 208 209 #endif 210