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void nand_power_up(void)
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void nand_power_up(void)
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{
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{
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    uint32_t i;
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    uint32_t i;
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    mutex_lock(&nand_mtx, TIMEOUT_BLOCK);
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    mutex_lock(&nand_mtx, TIMEOUT_BLOCK);
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    nand_last_activity_value = USEC_TIMER;
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    nand_last_activity_value = USEC_TIMER;
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    PWRCONEXT &= ~0x40;
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    PWRCON(1) &= ~0x40;
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    PWRCON &= ~0x100000;
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    PWRCON(0) &= ~0x100000;
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    PCON2 = 0x33333333;
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    PCON2 = 0x33333333;
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    PDAT2 = 0;
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    PDAT2 = 0;
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    PCON3 = 0x11113333;
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    PCON3 = 0x11113333;
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    PDAT3 = 0;
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    PDAT3 = 0;
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    PCON4 = 0x33333333;
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    PCON4 = 0x33333333;
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    PDAT3 = 0;
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    PDAT3 = 0;
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    PCON4 = 0x11111111;
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    PCON4 = 0x11111111;
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    PDAT4 = 0;
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    PDAT4 = 0;
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    PCON5 = (PCON5 & ~0xF) | 1;
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    PCON5 = (PCON5 & ~0xF) | 1;
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    PUNK5 = 1;
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    PUNK5 = 1;
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    PWRCONEXT |= 0x40;
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    PWRCON(1) |= 0x40;
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    PWRCON |= 0x100000;
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    PWRCON(0) |= 0x100000;
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    nand_powered = 0;
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    nand_powered = 0;
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    mutex_unlock(&nand_mtx);
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    mutex_unlock(&nand_mtx);
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}
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}
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uint32_t nand_read_page(uint32_t bank, uint32_t page, void* databuffer,
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uint32_t nand_read_page(uint32_t bank, uint32_t page, void* databuffer,