S5PV210(TQ210)学习笔记——Nand flash驱动编写

1. nand_chip->hip->cmd_ctrl=s5p_md_ctrl;
2. nand_chip->IO_ADDR_R=&s5p_nand_regs->nfdata;
3. nand_chip->IO_ADDR_W=&s5p_nand_regs->nfdata;
4. nand_chip->dev_ready=s5p_nand_ready;
5. nand_chip->ecc.mode=NAND_ECC_SOFT;
7. s5p_mtd_info->priv=nand_chip;
8. s5p_mtd_info->owner=THIS_MODULE;
10. //扫描Nandflash设备
11. if(nand_scan(s5p_mtd_info,1)){
12. dev_dbg(&pdev->dev,"nandscanerror");
13. gotoerr_free_info;
14. }
16. //添加分区信息
17. ret=mtd_device_parse_register(s5p_mtd_info,NULL,NULL,s5p_nand_partions,ARRAY_SIZE(s5p_nand_partions));
18. if(!ret)
19. return0;
21. err_free_info:
22. kfree(s5p_mtd_info);
23. err_free_chip:
24. kfree(nand_chip);
25. err_clk_put:
26. clk_disable(s5p_nand_clk);
27. clk_put(s5p_nand_clk);
28. err_iounmap:
29. //if(s5p_nand_ecc==NULL)
30. //iounmap(s5p_nand_ecc);
31. if(s5p_nand_regs==NULL)
32. iounmap(s5p_nand_regs);
33. err_exit:
34. returnret;
35. }
37. staticints5p_nand_remove(structplatform_device*pdev){
38. nand_release(s5p_mtd_info);
39. kfree(s5p_mtd_info);
40. kfree(nand_chip);
42. clk_disable(s5p_nand_clk);
43. clk_put(s5p_nand_clk);
45. if(s5p_nand_regs==NULL)
46. iounmap(s5p_nand_regs);
47. return0;
48. }
50. staticstructplatform_drivers5p_nand_drv={
51. .driver={
52. .owner=THIS_MODULE,
53. .name="s5p-nand",
54. },
55. .probe=s5p_nand_probe,
56. .remove=s5p_nand_remove,
57. };
59. module_platform_driver(s5p_nand_drv);
60. MODULE_LICENSE("GPL");

源码都在上面，具体的原理还是参考视频或者其他资料，这里就不多说了，如果有任何问题，欢迎留言讨论。