1/* Definitons for use with the tmio_mmc.c 2 * 3 * (c) 2004 Ian Molton <spyro@f2s.com> 4 * (c) 2007 Ian Molton <spyro@f2s.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 */ 11 12#include <linux/highmem.h> 13#include <linux/interrupt.h> 14#include <linux/dmaengine.h> 15 16#define CTL_SD_CMD 0x00 17#define CTL_ARG_REG 0x04 18#define CTL_STOP_INTERNAL_ACTION 0x08 19#define CTL_XFER_BLK_COUNT 0xa 20#define CTL_RESPONSE 0x0c 21#define CTL_STATUS 0x1c 22#define CTL_IRQ_MASK 0x20 23#define CTL_SD_CARD_CLK_CTL 0x24 24#define CTL_SD_XFER_LEN 0x26 25#define CTL_SD_MEM_CARD_OPT 0x28 26#define CTL_SD_ERROR_DETAIL_STATUS 0x2c 27#define CTL_SD_DATA_PORT 0x30 28#define CTL_TRANSACTION_CTL 0x34 29#define CTL_RESET_SD 0xe0 30#define CTL_SDIO_REGS 0x100 31#define CTL_CLK_AND_WAIT_CTL 0x138 32#define CTL_RESET_SDIO 0x1e0 33 34/* Definitions for values the CTRL_STATUS register can take. */ 35#define TMIO_STAT_CMDRESPEND 0x00000001 36#define TMIO_STAT_DATAEND 0x00000004 37#define TMIO_STAT_CARD_REMOVE 0x00000008 38#define TMIO_STAT_CARD_INSERT 0x00000010 39#define TMIO_STAT_SIGSTATE 0x00000020 40#define TMIO_STAT_WRPROTECT 0x00000080 41#define TMIO_STAT_CARD_REMOVE_A 0x00000100 42#define TMIO_STAT_CARD_INSERT_A 0x00000200 43#define TMIO_STAT_SIGSTATE_A 0x00000400 44#define TMIO_STAT_CMD_IDX_ERR 0x00010000 45#define TMIO_STAT_CRCFAIL 0x00020000 46#define TMIO_STAT_STOPBIT_ERR 0x00040000 47#define TMIO_STAT_DATATIMEOUT 0x00080000 48#define TMIO_STAT_RXOVERFLOW 0x00100000 49#define TMIO_STAT_TXUNDERRUN 0x00200000 50#define TMIO_STAT_CMDTIMEOUT 0x00400000 51#define TMIO_STAT_RXRDY 0x01000000 52#define TMIO_STAT_TXRQ 0x02000000 53#define TMIO_STAT_ILL_FUNC 0x20000000 54#define TMIO_STAT_CMD_BUSY 0x40000000 55#define TMIO_STAT_ILL_ACCESS 0x80000000 56 57/* Define some IRQ masks */ 58/* This is the mask used at reset by the chip */ 59#define TMIO_MASK_ALL 0x837f031d 60#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND) 61#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND) 62#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \ 63 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT) 64#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD) 65 66 67#define enable_mmc_irqs(host, i) \ 68 do { \ 69 u32 mask;\ 70 mask = sd_ctrl_read32((host), CTL_IRQ_MASK); \ 71 mask &= ~((i) & TMIO_MASK_IRQ); \ 72 sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \ 73 } while (0) 74 75#define disable_mmc_irqs(host, i) \ 76 do { \ 77 u32 mask;\ 78 mask = sd_ctrl_read32((host), CTL_IRQ_MASK); \ 79 mask |= ((i) & TMIO_MASK_IRQ); \ 80 sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \ 81 } while (0) 82 83#define ack_mmc_irqs(host, i) \ 84 do { \ 85 sd_ctrl_write32((host), CTL_STATUS, ~(i)); \ 86 } while (0) 87 88 89struct tmio_mmc_host { 90 void __iomem *ctl; 91 unsigned long bus_shift; 92 struct mmc_command *cmd; 93 struct mmc_request *mrq; 94 struct mmc_data *data; 95 struct mmc_host *mmc; 96 int irq; 97 98 /* Callbacks for clock / power control */ 99 void (*set_pwr)(struct platform_device *host, int state); 100 void (*set_clk_div)(struct platform_device *host, int state); 101 102 /* pio related stuff */ 103 struct scatterlist *sg_ptr; 104 unsigned int sg_len; 105 unsigned int sg_off; 106 107 struct platform_device *pdev; 108 109 /* DMA support */ 110 struct dma_chan *chan_rx; 111 struct dma_chan *chan_tx; 112 struct tasklet_struct dma_complete; 113 struct tasklet_struct dma_issue; 114#ifdef CONFIG_TMIO_MMC_DMA 115 struct dma_async_tx_descriptor *desc; 116 unsigned int dma_sglen; 117 dma_cookie_t cookie; 118#endif 119}; 120 121#include <linux/io.h> 122 123static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr) 124{ 125 return readw(host->ctl + (addr << host->bus_shift)); 126} 127 128static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr, 129 u16 *buf, int count) 130{ 131 readsw(host->ctl + (addr << host->bus_shift), buf, count); 132} 133 134static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr) 135{ 136 return readw(host->ctl + (addr << host->bus_shift)) | 137 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16; 138} 139 140static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, 141 u16 val) 142{ 143 writew(val, host->ctl + (addr << host->bus_shift)); 144} 145 146static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr, 147 u16 *buf, int count) 148{ 149 writesw(host->ctl + (addr << host->bus_shift), buf, count); 150} 151 152static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, 153 u32 val) 154{ 155 writew(val, host->ctl + (addr << host->bus_shift)); 156 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift)); 157} 158 159#include <linux/scatterlist.h> 160#include <linux/blkdev.h> 161 162static inline void tmio_mmc_init_sg(struct tmio_mmc_host *host, 163 struct mmc_data *data) 164{ 165 host->sg_len = data->sg_len; 166 host->sg_ptr = data->sg; 167 host->sg_off = 0; 168} 169 170static inline int tmio_mmc_next_sg(struct tmio_mmc_host *host) 171{ 172 host->sg_ptr = sg_next(host->sg_ptr); 173 host->sg_off = 0; 174 return --host->sg_len; 175} 176 177static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg, 178 unsigned long *flags) 179{ 180 local_irq_save(*flags); 181 return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset; 182} 183 184static inline void tmio_mmc_kunmap_atomic(void *virt, 185 unsigned long *flags) 186{ 187 kunmap_atomic(virt, KM_BIO_SRC_IRQ); 188 local_irq_restore(*flags); 189} 190 191#ifdef CONFIG_MMC_DEBUG 192 193#define STATUS_TO_TEXT(a) \ 194 do { \ 195 if (status & TMIO_STAT_##a) \ 196 printk(#a); \ 197 } while (0) 198 199void pr_debug_status(u32 status) 200{ 201 printk(KERN_DEBUG "status: %08x = ", status); 202 STATUS_TO_TEXT(CARD_REMOVE); 203 STATUS_TO_TEXT(CARD_INSERT); 204 STATUS_TO_TEXT(SIGSTATE); 205 STATUS_TO_TEXT(WRPROTECT); 206 STATUS_TO_TEXT(CARD_REMOVE_A); 207 STATUS_TO_TEXT(CARD_INSERT_A); 208 STATUS_TO_TEXT(SIGSTATE_A); 209 STATUS_TO_TEXT(CMD_IDX_ERR); 210 STATUS_TO_TEXT(STOPBIT_ERR); 211 STATUS_TO_TEXT(ILL_FUNC); 212 STATUS_TO_TEXT(CMD_BUSY); 213 STATUS_TO_TEXT(CMDRESPEND); 214 STATUS_TO_TEXT(DATAEND); 215 STATUS_TO_TEXT(CRCFAIL); 216 STATUS_TO_TEXT(DATATIMEOUT); 217 STATUS_TO_TEXT(CMDTIMEOUT); 218 STATUS_TO_TEXT(RXOVERFLOW); 219 STATUS_TO_TEXT(TXUNDERRUN); 220 STATUS_TO_TEXT(RXRDY); 221 STATUS_TO_TEXT(TXRQ); 222 STATUS_TO_TEXT(ILL_ACCESS); 223 printk("\n"); 224} 225 226#else 227#define pr_debug_status(s) do { } while (0) 228#endif 229