1084db4b0SAkinobu Mita #define pr_fmt(fmt) "mtd_test: " fmt 2084db4b0SAkinobu Mita 3084db4b0SAkinobu Mita #include <linux/init.h> 4084db4b0SAkinobu Mita #include <linux/module.h> 5084db4b0SAkinobu Mita #include <linux/sched.h> 6084db4b0SAkinobu Mita #include <linux/printk.h> 7084db4b0SAkinobu Mita 8084db4b0SAkinobu Mita #include "mtd_test.h" 9084db4b0SAkinobu Mita 10084db4b0SAkinobu Mita int mtdtest_erase_eraseblock(struct mtd_info *mtd, unsigned int ebnum) 11084db4b0SAkinobu Mita { 12084db4b0SAkinobu Mita int err; 13084db4b0SAkinobu Mita struct erase_info ei; 14084db4b0SAkinobu Mita loff_t addr = ebnum * mtd->erasesize; 15084db4b0SAkinobu Mita 16084db4b0SAkinobu Mita memset(&ei, 0, sizeof(struct erase_info)); 17084db4b0SAkinobu Mita ei.mtd = mtd; 18084db4b0SAkinobu Mita ei.addr = addr; 19084db4b0SAkinobu Mita ei.len = mtd->erasesize; 20084db4b0SAkinobu Mita 21084db4b0SAkinobu Mita err = mtd_erase(mtd, &ei); 22084db4b0SAkinobu Mita if (err) { 23084db4b0SAkinobu Mita pr_info("error %d while erasing EB %d\n", err, ebnum); 24084db4b0SAkinobu Mita return err; 25084db4b0SAkinobu Mita } 26084db4b0SAkinobu Mita 27084db4b0SAkinobu Mita if (ei.state == MTD_ERASE_FAILED) { 28084db4b0SAkinobu Mita pr_info("some erase error occurred at EB %d\n", ebnum); 29084db4b0SAkinobu Mita return -EIO; 30084db4b0SAkinobu Mita } 31084db4b0SAkinobu Mita return 0; 32084db4b0SAkinobu Mita } 33084db4b0SAkinobu Mita 34084db4b0SAkinobu Mita static int is_block_bad(struct mtd_info *mtd, unsigned int ebnum) 35084db4b0SAkinobu Mita { 36084db4b0SAkinobu Mita int ret; 37084db4b0SAkinobu Mita loff_t addr = ebnum * mtd->erasesize; 38084db4b0SAkinobu Mita 39084db4b0SAkinobu Mita ret = mtd_block_isbad(mtd, addr); 40084db4b0SAkinobu Mita if (ret) 41084db4b0SAkinobu Mita pr_info("block %d is bad\n", ebnum); 42084db4b0SAkinobu Mita 43084db4b0SAkinobu Mita return ret; 44084db4b0SAkinobu Mita } 45084db4b0SAkinobu Mita 46084db4b0SAkinobu Mita int mtdtest_scan_for_bad_eraseblocks(struct mtd_info *mtd, unsigned char *bbt, 47084db4b0SAkinobu Mita unsigned int eb, int ebcnt) 48084db4b0SAkinobu Mita { 49084db4b0SAkinobu Mita int i, bad = 0; 50084db4b0SAkinobu Mita 51084db4b0SAkinobu Mita if (!mtd_can_have_bb(mtd)) 52084db4b0SAkinobu Mita return 0; 53084db4b0SAkinobu Mita 54084db4b0SAkinobu Mita pr_info("scanning for bad eraseblocks\n"); 55084db4b0SAkinobu Mita for (i = 0; i < ebcnt; ++i) { 56084db4b0SAkinobu Mita bbt[i] = is_block_bad(mtd, eb + i) ? 1 : 0; 57084db4b0SAkinobu Mita if (bbt[i]) 58084db4b0SAkinobu Mita bad += 1; 59084db4b0SAkinobu Mita cond_resched(); 60084db4b0SAkinobu Mita } 61084db4b0SAkinobu Mita pr_info("scanned %d eraseblocks, %d are bad\n", i, bad); 62084db4b0SAkinobu Mita 63084db4b0SAkinobu Mita return 0; 64084db4b0SAkinobu Mita } 65084db4b0SAkinobu Mita 66084db4b0SAkinobu Mita int mtdtest_erase_good_eraseblocks(struct mtd_info *mtd, unsigned char *bbt, 67084db4b0SAkinobu Mita unsigned int eb, int ebcnt) 68084db4b0SAkinobu Mita { 69084db4b0SAkinobu Mita int err; 70084db4b0SAkinobu Mita unsigned int i; 71084db4b0SAkinobu Mita 72084db4b0SAkinobu Mita for (i = 0; i < ebcnt; ++i) { 73084db4b0SAkinobu Mita if (bbt[i]) 74084db4b0SAkinobu Mita continue; 75084db4b0SAkinobu Mita err = mtdtest_erase_eraseblock(mtd, eb + i); 76084db4b0SAkinobu Mita if (err) 77084db4b0SAkinobu Mita return err; 78084db4b0SAkinobu Mita cond_resched(); 79084db4b0SAkinobu Mita } 80084db4b0SAkinobu Mita 81084db4b0SAkinobu Mita return 0; 82084db4b0SAkinobu Mita } 83084db4b0SAkinobu Mita 84084db4b0SAkinobu Mita int mtdtest_read(struct mtd_info *mtd, loff_t addr, size_t size, void *buf) 85084db4b0SAkinobu Mita { 86084db4b0SAkinobu Mita size_t read; 87084db4b0SAkinobu Mita int err; 88084db4b0SAkinobu Mita 89084db4b0SAkinobu Mita err = mtd_read(mtd, addr, size, &read, buf); 90084db4b0SAkinobu Mita /* Ignore corrected ECC errors */ 91084db4b0SAkinobu Mita if (mtd_is_bitflip(err)) 92084db4b0SAkinobu Mita err = 0; 93084db4b0SAkinobu Mita if (!err && read != size) 94084db4b0SAkinobu Mita err = -EIO; 95abc173adSAkinobu Mita if (err) 96abc173adSAkinobu Mita pr_err("error: read failed at %#llx\n", addr); 97084db4b0SAkinobu Mita 98084db4b0SAkinobu Mita return err; 99084db4b0SAkinobu Mita } 100084db4b0SAkinobu Mita 101084db4b0SAkinobu Mita int mtdtest_write(struct mtd_info *mtd, loff_t addr, size_t size, 102084db4b0SAkinobu Mita const void *buf) 103084db4b0SAkinobu Mita { 104084db4b0SAkinobu Mita size_t written; 105084db4b0SAkinobu Mita int err; 106084db4b0SAkinobu Mita 107084db4b0SAkinobu Mita err = mtd_write(mtd, addr, size, &written, buf); 108084db4b0SAkinobu Mita if (!err && written != size) 109084db4b0SAkinobu Mita err = -EIO; 110084db4b0SAkinobu Mita 111084db4b0SAkinobu Mita return err; 112084db4b0SAkinobu Mita } 113