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Nano2G lowlevel NAND operation transaction splitting support

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25152 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sparmann 2010-03-13 21:38:18 +00:00
parent 0d6784fee2
commit af77b1842c
1 changed files with 32 additions and 21 deletions
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53
firmware/target/arm/s5l8700/ipodnano2g/nand-nano2g.c
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@ -215,10 +215,9 @@ uint32_t nand_wait_status_ready(uint32_t bank)
return nand_send_cmd(NAND_CMD_READ);
}
uint32_t nand_transfer_data(uint32_t bank, uint32_t direction,
void* buffer, uint32_t size)
void nand_transfer_data_start(uint32_t bank, uint32_t direction,
void* buffer, uint32_t size)
{
long timeout = current_tick + HZ / 50;
nand_set_fmctrl0(bank, FMCTRL0_ENABLEDMA);
FMDNUM = size - 1;
FMCTRL1 = FMCTRL1_DOREADDATA << direction;
@ -232,6 +231,11 @@ uint32_t nand_transfer_data(uint32_t bank, uint32_t direction,
DMATCNT3 = (size >> 4) - 1;
clean_dcache();
DMACOM3 = 4;
}
uint32_t nand_transfer_data_collect(uint32_t direction)
{
long timeout = current_tick + HZ / 50;
while ((DMAALLST & DMAALLST_DMABUSY3))
if (nand_timeout(timeout)) return 1;
if (!direction) invalidate_dcache();
@ -241,17 +245,29 @@ uint32_t nand_transfer_data(uint32_t bank, uint32_t direction,
return 0;
}
uint32_t ecc_decode(uint32_t size, void* databuffer, void* sparebuffer)
uint32_t nand_transfer_data(uint32_t bank, uint32_t direction,
void* buffer, uint32_t size)
{
nand_transfer_data_start(bank, direction, buffer, size);
uint32_t rc = nand_transfer_data_collect(direction);
return rc;
}
void ecc_start(uint32_t size, void* databuffer, void* sparebuffer, uint32_t type)
{
mutex_lock(&ecc_mtx);
long timeout = current_tick + HZ / 50;
ECC_INT_CLR = 1;
SRCPND = INTMSK_ECC;
ECC_UNK1 = size;
ECC_DATA_PTR = (uint32_t)databuffer;
ECC_SPARE_PTR = (uint32_t)sparebuffer;
clean_dcache();
ECC_CTRL = ECCCTRL_STARTDECODING;
ECC_CTRL = type;
}
uint32_t ecc_collect(void)
{
long timeout = current_tick + HZ / 50;
while (!(SRCPND & INTMSK_ECC))
if (nand_timeout(timeout)) return ecc_unlock(1);
invalidate_dcache();
@ -260,23 +276,18 @@ uint32_t ecc_decode(uint32_t size, void* databuffer, void* sparebuffer)
return ecc_unlock(ECC_RESULT);
}
uint32_t ecc_decode(uint32_t size, void* databuffer, void* sparebuffer)
{
ecc_start(size, databuffer, sparebuffer, ECCCTRL_STARTDECODING);
uint32_t rc = ecc_collect();
return rc;
}
uint32_t ecc_encode(uint32_t size, void* databuffer, void* sparebuffer)
{
mutex_lock(&ecc_mtx);
long timeout = current_tick + HZ / 50;
ECC_INT_CLR = 1;
SRCPND = INTMSK_ECC;
ECC_UNK1 = size;
ECC_DATA_PTR = (uint32_t)databuffer;
ECC_SPARE_PTR = (uint32_t)sparebuffer;
clean_dcache();
ECC_CTRL = ECCCTRL_STARTENCODING;
while (!(SRCPND & INTMSK_ECC))
if (nand_timeout(timeout)) return ecc_unlock(1);
invalidate_dcache();
ECC_INT_CLR = 1;
SRCPND = INTMSK_ECC;
return ecc_unlock(0);
ecc_start(size, databuffer, sparebuffer, ECCCTRL_STARTENCODING);
ecc_collect();
return 0;
}
uint32_t nand_check_empty(uint8_t* buffer)