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/mutex.h> 22 #include <linux/pagemap.h> 23 #include <linux/scatterlist.h> 24 #include <linux/spinlock.h> 25 26 /* Definitions for values the CTRL_SDIO_STATUS register can take. */ 27 #define TMIO_SDIO_STAT_IOIRQ 0x0001 28 #define TMIO_SDIO_STAT_EXPUB52 0x4000 29 #define TMIO_SDIO_STAT_EXWT 0x8000 30 #define TMIO_SDIO_MASK_ALL 0xc007 31 32 /* Define some IRQ masks */ 33 /* This is the mask used at reset by the chip */ 34 #define TMIO_MASK_ALL 0x837f031d 35 #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) 36 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) 37 #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ 38 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) 39 #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) 40 41 struct tmio_mmc_data; 42 43 struct tmio_mmc_host { 44 void __iomem *ctl; 45 struct mmc_command *cmd; 46 struct mmc_request *mrq; 47 struct mmc_data *data; 48 struct mmc_host *mmc; 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 struct work_struct done; 75 76 /* Cache */ 77 u32 sdcard_irq_mask; 78 u32 sdio_irq_mask; 79 unsigned int clk_cache; 80 81 spinlock_t lock; /* protect host private data */ 82 unsigned long last_req_ts; 83 struct mutex ios_lock; /* protect set_ios() context */ 84 bool native_hotplug; 85 bool sdio_irq_enabled; 86 }; 87 88 int tmio_mmc_host_probe(struct tmio_mmc_host **host, 89 struct platform_device *pdev, 90 struct tmio_mmc_data *pdata); 91 void tmio_mmc_host_remove(struct tmio_mmc_host *host); 92 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); 93 94 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 95 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 96 irqreturn_t tmio_mmc_irq(int irq, void *devid); 97 irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid); 98 irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid); 99 irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid); 100 101 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 102 unsigned long *flags) 103 { 104 local_irq_save(*flags); 105 return kmap_atomic(sg_page(sg)) + sg->offset; 106 } 107 108 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, 109 unsigned long *flags, void *virt) 110 { 111 kunmap_atomic(virt - sg->offset); 112 local_irq_restore(*flags); 113 } 114 115 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) 116 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); 117 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); 118 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); 119 void tmio_mmc_release_dma(struct tmio_mmc_host *host); 120 void tmio_mmc_abort_dma(struct tmio_mmc_host *host); 121 #else 122 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, 123 struct mmc_data *data) 124 { 125 } 126 127 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) 128 { 129 } 130 131 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, 132 struct tmio_mmc_data *pdata) 133 { 134 host->chan_tx = NULL; 135 host->chan_rx = NULL; 136 } 137 138 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) 139 { 140 } 141 142 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) 143 { 144 } 145 #endif 146 147 #ifdef CONFIG_PM 148 int tmio_mmc_host_runtime_suspend(struct device *dev); 149 int tmio_mmc_host_runtime_resume(struct device *dev); 150 #endif 151 152 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) 153 { 154 return readw(host->ctl + (addr << host->pdata->bus_shift)); 155 } 156 157 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, 158 u16 *buf, int count) 159 { 160 readsw(host->ctl + (addr << host->pdata->bus_shift), buf, count); 161 } 162 163 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) 164 { 165 return readw(host->ctl + (addr << host->pdata->bus_shift)) | 166 readw(host->ctl + ((addr + 2) << host->pdata->bus_shift)) << 16; 167 } 168 169 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) 170 { 171 /* If there is a hook and it returns non-zero then there 172 * is an error and the write should be skipped 173 */ 174 if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr)) 175 return; 176 writew(val, host->ctl + (addr << host->pdata->bus_shift)); 177 } 178 179 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, 180 u16 *buf, int count) 181 { 182 writesw(host->ctl + (addr << host->pdata->bus_shift), buf, count); 183 } 184 185 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) 186 { 187 writew(val, host->ctl + (addr << host->pdata->bus_shift)); 188 writew(val >> 16, host->ctl + ((addr + 2) << host->pdata->bus_shift)); 189 } 190 191 192 #endif 193