1 #ifndef __ASM_ARCH_PXA3XX_NAND_H
2 #define __ASM_ARCH_PXA3XX_NAND_H
4 #include <linux/mtd/mtd.h>
5 #include <linux/mtd/partitions.h>
7 struct pxa3xx_nand_timing {
8 unsigned int tCH; /* Enable signal hold time */
9 unsigned int tCS; /* Enable signal setup time */
10 unsigned int tWH; /* ND_nWE high duration */
11 unsigned int tWP; /* ND_nWE pulse time */
12 unsigned int tRH; /* ND_nRE high duration */
13 unsigned int tRP; /* ND_nRE pulse width */
14 unsigned int tR; /* ND_nWE high to ND_nRE low for read */
15 unsigned int tWHR; /* ND_nWE high to ND_nRE low for status read */
16 unsigned int tAR; /* ND_ALE low to ND_nRE low delay */
19 struct pxa3xx_nand_flash {
21 unsigned int flash_width; /* Width of Flash memory (DWIDTH_M) */
22 unsigned int dfc_width; /* Width of flash controller(DWIDTH_C) */
23 struct pxa3xx_nand_timing *timing; /* NAND Flash timing */
27 * Current pxa3xx_nand controller has two chip select which
30 * Notice should be taken that:
31 * When you want to use this feature, you should not enable the
32 * keep configuration feature, for two chip select could be
33 * attached with different nand chip. The different page size
34 * and timing requirement make the keep configuration impossible.
37 /* The max num of chip select current support */
38 #define NUM_CHIP_SELECT (2)
39 struct pxa3xx_nand_platform_data {
40 /* the data flash bus is shared between the Static Memory
41 * Controller and the Data Flash Controller, the arbiter
42 * controls the ownership of the bus
46 /* allow platform code to keep OBM/bootloader defined NFC config */
49 /* indicate how many chip selects will be used */
52 /* use an flash-based bad block table */
55 /* requested ECC strength and ECC step size */
56 int ecc_strength, ecc_step_size;
58 const struct mtd_partition *parts[NUM_CHIP_SELECT];
59 unsigned int nr_parts[NUM_CHIP_SELECT];
61 const struct pxa3xx_nand_flash *flash;
64 #endif /* __ASM_ARCH_PXA3XX_NAND_H */