/* * include/linux/mg_disk.c * * Support for the mGine m[g]flash IO mode. * Based on legacy hd.c * * (c) 2008 mGine Co.,LTD * (c) 2008 unsik Kim * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __MG_DISK_H__ #define __MG_DISK_H__ #include #include /* name for block device */ #define MG_DISK_NAME "mgd" /* name for platform device */ #define MG_DEV_NAME "mg_disk" #define MG_DISK_MAJ 0 #define MG_DISK_MAX_PART 16 #define MG_SECTOR_SIZE 512 #define MG_MAX_SECTS 256 /* Register offsets */ #define MG_BUFF_OFFSET 0x8000 #define MG_STORAGE_BUFFER_SIZE 0x200 #define MG_REG_OFFSET 0xC000 #define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */ #define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */ #define MG_REG_SECT_CNT (MG_REG_OFFSET + 4) #define MG_REG_SECT_NUM (MG_REG_OFFSET + 6) #define MG_REG_CYL_LOW (MG_REG_OFFSET + 8) #define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA) #define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC) #define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */ #define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */ #define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10) #define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12) /* "Drive Select/Head Register" bit values */ #define MG_REG_HEAD_MUST_BE_ON 0xA0 /* These 2 bits are always on */ #define MG_REG_HEAD_DRIVE_MASTER (0x00 | MG_REG_HEAD_MUST_BE_ON) #define MG_REG_HEAD_DRIVE_SLAVE (0x10 | MG_REG_HEAD_MUST_BE_ON) #define MG_REG_HEAD_LBA_MODE (0x40 | MG_REG_HEAD_MUST_BE_ON) /* "Device Control Register" bit values */ #define MG_REG_CTRL_INTR_ENABLE 0x0 #define MG_REG_CTRL_INTR_DISABLE (0x1<<1) #define MG_REG_CTRL_RESET (0x1<<2) #define MG_REG_CTRL_INTR_POLA_ACTIVE_HIGH 0x0 #define MG_REG_CTRL_INTR_POLA_ACTIVE_LOW (0x1<<4) #define MG_REG_CTRL_DPD_POLA_ACTIVE_LOW 0x0 #define MG_REG_CTRL_DPD_POLA_ACTIVE_HIGH (0x1<<5) #define MG_REG_CTRL_DPD_DISABLE 0x0 #define MG_REG_CTRL_DPD_ENABLE (0x1<<6) /* Status register bit */ /* error bit in status register */ #define MG_REG_STATUS_BIT_ERROR 0x01 /* corrected error in status register */ #define MG_REG_STATUS_BIT_CORRECTED_ERROR 0x04 /* data request bit in status register */ #define MG_REG_STATUS_BIT_DATA_REQ 0x08 /* DSC - Drive Seek Complete */ #define MG_REG_STATUS_BIT_SEEK_DONE 0x10 /* DWF - Drive Write Fault */ #define MG_REG_STATUS_BIT_WRITE_FAULT 0x20 #define MG_REG_STATUS_BIT_READY 0x40 #define MG_REG_STATUS_BIT_BUSY 0x80 /* handy status */ #define MG_STAT_READY (MG_REG_STATUS_BIT_READY | MG_REG_STATUS_BIT_SEEK_DONE) #define MG_READY_OK(s) (((s) & (MG_STAT_READY | \ (MG_REG_STATUS_BIT_BUSY | \ MG_REG_STATUS_BIT_WRITE_FAULT | \ MG_REG_STATUS_BIT_ERROR))) == MG_STAT_READY) /* Error register */ #define MG_REG_ERR_AMNF 0x01 #define MG_REG_ERR_ABRT 0x04 #define MG_REG_ERR_IDNF 0x10 #define MG_REG_ERR_UNC 0x40 #define MG_REG_ERR_BBK 0x80 /* error code for others */ #define MG_ERR_NONE 0 #define MG_ERR_TIMEOUT 0x100 #define MG_ERR_INIT_STAT 0x101 #define MG_ERR_TRANSLATION 0x102 #define MG_ERR_CTRL_RST 0x103 #define MG_ERR_INV_STAT 0x104 #define MG_ERR_RSTOUT 0x105 #define MG_MAX_ERRORS 6 /* Max read/write errors */ /* command */ #define MG_CMD_RD 0x20 #define MG_CMD_WR 0x30 #define MG_CMD_SLEEP 0x99 #define MG_CMD_WAKEUP 0xC3 #define MG_CMD_ID 0xEC #define MG_CMD_WR_CONF 0x3C #define MG_CMD_RD_CONF 0x40 /* operation mode */ #define MG_OP_CASCADE (1 << 0) #define MG_OP_CASCADE_SYNC_RD (1 << 1) #define MG_OP_CASCADE_SYNC_WR (1 << 2) #define MG_OP_INTERLEAVE (1 << 3) /* synchronous */ #define MG_BURST_LAT_4 (3 << 4) #define MG_BURST_LAT_5 (4 << 4) #define MG_BURST_LAT_6 (5 << 4) #define MG_BURST_LAT_7 (6 << 4) #define MG_BURST_LAT_8 (7 << 4) #define MG_BURST_LEN_4 (1 << 1) #define MG_BURST_LEN_8 (2 << 1) #define MG_BURST_LEN_16 (3 << 1) #define MG_BURST_LEN_32 (4 << 1) #define MG_BURST_LEN_CONT (0 << 1) /* timeout value (unit: ms) */ #define MG_TMAX_CONF_TO_CMD 1 #define MG_TMAX_WAIT_RD_DRQ 10 #define MG_TMAX_WAIT_WR_DRQ 500 #define MG_TMAX_RST_TO_BUSY 10 #define MG_TMAX_HDRST_TO_RDY 500 #define MG_TMAX_SWRST_TO_RDY 500 #define MG_TMAX_RSTOUT 3000 /* device attribution */ /* use mflash as boot device */ #define MG_BOOT_DEV (1 << 0) /* use mflash as storage device */ #define MG_STORAGE_DEV (1 << 1) /* same as MG_STORAGE_DEV, but bootloader already done reset sequence */ #define MG_STORAGE_DEV_SKIP_RST (1 << 2) #define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST) /* names of GPIO resource */ #define MG_RST_PIN "mg_rst" /* except MG_BOOT_DEV, reset-out pin should be assigned */ #define MG_RSTOUT_PIN "mg_rstout" /* private driver data */ struct mg_drv_data { /* disk resource */ u32 use_polling; /* device attribution */ u32 dev_attr; /* internally used */ struct mg_host *host; }; /* main structure for mflash driver */ struct mg_host { struct device *dev; struct request_queue *breq; spinlock_t lock; struct gendisk *gd; struct timer_list timer; void (*mg_do_intr) (struct mg_host *); u16 id[ATA_ID_WORDS]; u16 cyls; u16 heads; u16 sectors; u32 n_sectors; u32 nres_sectors; void __iomem *dev_base; unsigned int irq; unsigned int rst; unsigned int rstout; u32 major; u32 error; }; /* * Debugging macro and defines */ #undef DO_MG_DEBUG #ifdef DO_MG_DEBUG # define MG_DBG(fmt, args...) \ printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args) #else /* CONFIG_MG_DEBUG */ # define MG_DBG(fmt, args...) do { } while (0) #endif /* CONFIG_MG_DEBUG */ #endif