mirror of
https://github.com/AsahiLinux/u-boot
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c316f577b4
Enable GPMC's prefetch feature for NAND access. This speeds up NAND read access a lot by pre-fetching contents in the background and reading them through the FIFO address. The current implementation has two limitations: a) it only works in 8-bit mode b) it only supports read access Both is easily fixable by someone who has hardware to implement it. Note that U-Boot code uses non word-aligned buffers to read data into, and request read lengths that are not multiples of 4, so both partial buffers (head and tail) have to be addressed. Tested on AM335x hardware. Tested-by: Guido Martínez <guido@vanguardiasur.com.ar> Reviewed-by: Guido Martínez <guido@vanguardiasur.com.ar> Signed-off-by: Daniel Mack <zonque@gmail.com> [trini: Make apply again, use 'cs' fix pointed out by Guido] Signed-off-by: Tom Rini <trini@ti.com>
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*
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* (C) Copyright 2004-2008 Texas Instruments, <www.ti.com>
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* Rohit Choraria <rohitkc@ti.com>
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*
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* (C) Copyright 2013 Andreas Bießmann <andreas.devel@googlemail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __ASM_OMAP_GPMC_H
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#define __ASM_OMAP_GPMC_H
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#define GPMC_BUF_EMPTY 0
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#define GPMC_BUF_FULL 1
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#define GPMC_MAX_SECTORS 8
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enum omap_ecc {
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/* 1-bit ECC calculation by Software, Error detection by Software */
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OMAP_ECC_HAM1_CODE_SW = 1, /* avoid un-initialized int can be 0x0 */
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/* 1-bit ECC calculation by GPMC, Error detection by Software */
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/* ECC layout compatible to legacy ROMCODE. */
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OMAP_ECC_HAM1_CODE_HW,
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/* 4-bit ECC calculation by GPMC, Error detection by Software */
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OMAP_ECC_BCH4_CODE_HW_DETECTION_SW,
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/* 4-bit ECC calculation by GPMC, Error detection by ELM */
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OMAP_ECC_BCH4_CODE_HW,
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/* 8-bit ECC calculation by GPMC, Error detection by Software */
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OMAP_ECC_BCH8_CODE_HW_DETECTION_SW,
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/* 8-bit ECC calculation by GPMC, Error detection by ELM */
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OMAP_ECC_BCH8_CODE_HW,
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/* 16-bit ECC calculation by GPMC, Error detection by ELM */
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OMAP_ECC_BCH16_CODE_HW,
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};
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struct gpmc_cs {
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u32 config1; /* 0x00 */
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u32 config2; /* 0x04 */
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u32 config3; /* 0x08 */
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u32 config4; /* 0x0C */
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u32 config5; /* 0x10 */
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u32 config6; /* 0x14 */
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u32 config7; /* 0x18 */
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u32 nand_cmd; /* 0x1C */
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u32 nand_adr; /* 0x20 */
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u32 nand_dat; /* 0x24 */
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u8 res[8]; /* blow up to 0x30 byte */
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};
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struct bch_res_0_3 {
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u32 bch_result_x[4];
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};
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struct bch_res_4_6 {
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u32 bch_result_x[3];
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};
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struct gpmc {
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u8 res1[0x10];
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u32 sysconfig; /* 0x10 */
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u8 res2[0x4];
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u32 irqstatus; /* 0x18 */
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u32 irqenable; /* 0x1C */
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u8 res3[0x20];
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u32 timeout_control; /* 0x40 */
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u8 res4[0xC];
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u32 config; /* 0x50 */
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u32 status; /* 0x54 */
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u8 res5[0x8]; /* 0x58 */
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struct gpmc_cs cs[8]; /* 0x60, 0x90, .. */
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u32 prefetch_config1; /* 0x1E0 */
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u32 prefetch_config2; /* 0x1E4 */
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u32 res6; /* 0x1E8 */
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u32 prefetch_control; /* 0x1EC */
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u32 prefetch_status; /* 0x1F0 */
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u32 ecc_config; /* 0x1F4 */
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u32 ecc_control; /* 0x1F8 */
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u32 ecc_size_config; /* 0x1FC */
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u32 ecc1_result; /* 0x200 */
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u32 ecc2_result; /* 0x204 */
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u32 ecc3_result; /* 0x208 */
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u32 ecc4_result; /* 0x20C */
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u32 ecc5_result; /* 0x210 */
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u32 ecc6_result; /* 0x214 */
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u32 ecc7_result; /* 0x218 */
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u32 ecc8_result; /* 0x21C */
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u32 ecc9_result; /* 0x220 */
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u8 res7[12]; /* 0x224 */
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u32 testmomde_ctrl; /* 0x230 */
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u8 res8[12]; /* 0x234 */
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struct bch_res_0_3 bch_result_0_3[GPMC_MAX_SECTORS]; /* 0x240,0x250, */
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u8 res9[16 * 4]; /* 0x2C0 - 0x2FF */
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struct bch_res_4_6 bch_result_4_6[GPMC_MAX_SECTORS]; /* 0x300,0x310, */
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};
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/* Used for board specific gpmc initialization */
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extern struct gpmc *gpmc_cfg;
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#endif /* __ASM_OMAP_GPMC_H */
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