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/spinlock.h> 24 #include <linux/scatterlist.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 unsigned int sdio_irq_enabled; 51 52 /* Callbacks for clock / power control */ 53 void (*set_pwr)(struct platform_device *host, int state); 54 void (*set_clk_div)(struct platform_device *host, int state); 55 56 int pm_error; 57 /* recognise system-wide suspend in runtime PM methods */ 58 bool pm_global; 59 60 /* pio related stuff */ 61 struct scatterlist *sg_ptr; 62 struct scatterlist *sg_orig; 63 unsigned int sg_len; 64 unsigned int sg_off; 65 66 struct platform_device *pdev; 67 struct tmio_mmc_data *pdata; 68 69 /* DMA support */ 70 bool force_pio; 71 struct dma_chan *chan_rx; 72 struct dma_chan *chan_tx; 73 struct tasklet_struct dma_complete; 74 struct tasklet_struct dma_issue; 75 struct scatterlist bounce_sg; 76 u8 *bounce_buf; 77 78 /* Track lost interrupts */ 79 struct delayed_work delayed_reset_work; 80 struct work_struct done; 81 82 spinlock_t lock; /* protect host private data */ 83 unsigned long last_req_ts; 84 struct mutex ios_lock; /* protect set_ios() context */ 85 }; 86 87 int tmio_mmc_host_probe(struct tmio_mmc_host **host, 88 struct platform_device *pdev, 89 struct tmio_mmc_data *pdata); 90 void tmio_mmc_host_remove(struct tmio_mmc_host *host); 91 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host); 92 93 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 94 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i); 95 irqreturn_t tmio_mmc_irq(int irq, void *devid); 96 97 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 98 unsigned long *flags) 99 { 100 local_irq_save(*flags); 101 return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset; 102 } 103 104 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg, 105 unsigned long *flags, void *virt) 106 { 107 kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ); 108 local_irq_restore(*flags); 109 } 110 111 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE) 112 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data); 113 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable); 114 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata); 115 void tmio_mmc_release_dma(struct tmio_mmc_host *host); 116 #else 117 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, 118 struct mmc_data *data) 119 { 120 } 121 122 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) 123 { 124 } 125 126 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, 127 struct tmio_mmc_data *pdata) 128 { 129 host->chan_tx = NULL; 130 host->chan_rx = NULL; 131 } 132 133 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) 134 { 135 } 136 #endif 137 138 #ifdef CONFIG_PM 139 int tmio_mmc_host_suspend(struct device *dev); 140 int tmio_mmc_host_resume(struct device *dev); 141 #else 142 #define tmio_mmc_host_suspend NULL 143 #define tmio_mmc_host_resume NULL 144 #endif 145 146 int tmio_mmc_host_runtime_suspend(struct device *dev); 147 int tmio_mmc_host_runtime_resume(struct device *dev); 148 149 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) 150 { 151 return readw(host->ctl + (addr << host->bus_shift)); 152 } 153 154 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, 155 u16 *buf, int count) 156 { 157 readsw(host->ctl + (addr << host->bus_shift), buf, count); 158 } 159 160 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) 161 { 162 return readw(host->ctl + (addr << host->bus_shift)) | 163 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; 164 } 165 166 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val) 167 { 168 /* If there is a hook and it returns non-zero then there 169 * is an error and the write should be skipped 170 */ 171 if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr)) 172 return; 173 writew(val, host->ctl + (addr << host->bus_shift)); 174 } 175 176 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, 177 u16 *buf, int count) 178 { 179 writesw(host->ctl + (addr << host->bus_shift), buf, count); 180 } 181 182 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val) 183 { 184 writew(val, host->ctl + (addr << host->bus_shift)); 185 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); 186 } 187 188 189 #endif 190