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 unsigned long bus_shift; 46 struct mmc_command *cmd; 47 struct mmc_request *mrq; 48 struct mmc_data *data; 49 struct mmc_host *mmc; 50 51 /* Controller power state */ 52 bool power; 53 54 /* Callbacks for clock / power control */ 55 void (*set_pwr)(struct platform_device *host, int state); 56 void (*set_clk_div)(struct platform_device *host, int state); 57 58 /* pio related stuff */ 59 struct scatterlist *sg_ptr; 60 struct scatterlist *sg_orig; 61 unsigned int sg_len; 62 unsigned int sg_off; 63 64 struct platform_device *pdev; 65 struct tmio_mmc_data *pdata; 66 67 /* DMA support */ 68 bool force_pio; 69 struct dma_chan *chan_rx; 70 struct dma_chan *chan_tx; 71 struct tasklet_struct dma_complete; 72 struct tasklet_struct dma_issue; 73 struct scatterlist bounce_sg; 74 u8 *bounce_buf; 75 76 /* Track lost interrupts */ 77 struct delayed_work delayed_reset_work; 78 struct work_struct done; 79 80 /* Cache IRQ mask */ 81 u32 sdcard_irq_mask; 82 u32 sdio_irq_mask; 83 84 spinlock_t lock; /* protect host private data */ 85 unsigned long last_req_ts; 86 struct mutex ios_lock; /* protect set_ios() context */ 87 bool native_hotplug; 88 }; 89 90 int tmio_mmc_host_probe(struct tmio_mmc_host **host, 91 struct platform_device *pdev, 92 struct tmio_mmc_data *pdata); 93 void tmio_mmc_host_remove(struct tmio_mmc_host *host); 94 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); 95 96 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 97 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 98 irqreturn_t tmio_mmc_irq(int irq, void *devid); 99 irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid); 100 irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid); 101 irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid); 102 103 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 104 unsigned long *flags) 105 { 106 local_irq_save(*flags); 107 return kmap_atomic(sg_page(sg)) + sg->offset; 108 } 109 110 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, 111 unsigned long *flags, void *virt) 112 { 113 kunmap_atomic(virt - sg->offset); 114 local_irq_restore(*flags); 115 } 116 117 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) 118 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); 119 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); 120 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); 121 void tmio_mmc_release_dma(struct tmio_mmc_host *host); 122 void tmio_mmc_abort_dma(struct tmio_mmc_host *host); 123 #else 124 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, 125 struct mmc_data *data) 126 { 127 } 128 129 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) 130 { 131 } 132 133 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, 134 struct tmio_mmc_data *pdata) 135 { 136 host->chan_tx = NULL; 137 host->chan_rx = NULL; 138 } 139 140 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) 141 { 142 } 143 144 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) 145 { 146 } 147 #endif 148 149 #ifdef CONFIG_PM 150 int tmio_mmc_host_suspend(struct device *dev); 151 int tmio_mmc_host_resume(struct device *dev); 152 #else 153 #define tmio_mmc_host_suspend NULL 154 #define tmio_mmc_host_resume NULL 155 #endif 156 157 int tmio_mmc_host_runtime_suspend(struct device *dev); 158 int tmio_mmc_host_runtime_resume(struct device *dev); 159 160 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) 161 { 162 return readw(host->ctl + (addr << host->bus_shift)); 163 } 164 165 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, 166 u16 *buf, int count) 167 { 168 readsw(host->ctl + (addr << host->bus_shift), buf, count); 169 } 170 171 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) 172 { 173 return readw(host->ctl + (addr << host->bus_shift)) | 174 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; 175 } 176 177 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) 178 { 179 /* If there is a hook and it returns non-zero then there 180 * is an error and the write should be skipped 181 */ 182 if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr)) 183 return; 184 writew(val, host->ctl + (addr << host->bus_shift)); 185 } 186 187 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, 188 u16 *buf, int count) 189 { 190 writesw(host->ctl + (addr << host->bus_shift), buf, count); 191 } 192 193 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) 194 { 195 writew(val, host->ctl + (addr << host->bus_shift)); 196 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); 197 } 198 199 200 #endif 201