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Fix nand wait/IRQ stuff, make nand_wait wait for IRQ now

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marcan 2009-03-18 18:19:27 +01:00 committed by bushing
parent 5c09a5c16b
commit e1ca14840e
1 changed files with 18 additions and 4 deletions
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22
nand.c
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@ -53,6 +53,7 @@ static ipc_request current_request;
static u8 ipc_data[PAGE_SIZE] MEM2_BSS ALIGNED(32);
static u8 ipc_ecc[ECC_BUFFER_ALLOC] MEM2_BSS ALIGNED(128); //128 alignment REQUIRED
static volatile int irq_flag;
static inline u32 __nand_read32(u32 addr)
{
@ -90,6 +91,7 @@ void nand_irq(void)
current_request.code = 0;
ipc_post(code, tag, 1, err);
}
irq_flag = 1;
}
inline void __nand_write32(u32 addr, u32 data)
@ -149,6 +151,7 @@ int nand_reset(void)
}
void nand_get_id(u8 *idbuf) {
irq_flag = 0;
__nand_set_address(0,0);
dc_invalidaterange(idbuf, 0x40);
@ -158,33 +161,42 @@ void nand_get_id(u8 *idbuf) {
}
void nand_get_status(u8 *status_buf) {
irq_flag = 0;
status_buf[0]=0;
dc_invalidaterange(status_buf, 0x40);
__nand_setup_dma(status_buf, (u8 *)-1);
nand_send_command(NAND_GETSTATUS, 0, NAND_FLAGS_IRQ | NAND_FLAGS_RD, 0x40);
__nand_wait();
}
void nand_read_page(u32 pageno, void *data, void *ecc) {
// NAND_debug("nand_read_page(%u, %p, %p)\n", pageno, data, ecc);
irq_flag = 0;
__nand_set_address(0, pageno);
nand_send_command(NAND_READ_PRE, 0x1f, 0, 0);
dc_invalidaterange(data, PAGE_SIZE);
dc_invalidaterange(ecc, ECC_BUFFER_SIZE);
__nand_wait();
__nand_setup_dma(data, ecc);
nand_send_command(NAND_READ_POST, 0, NAND_FLAGS_IRQ | NAND_FLAGS_WAIT | NAND_FLAGS_RD | NAND_FLAGS_ECC, 0x840);
}
void nand_wait() {
__nand_wait();
// power-saving IRQ wait
while(!irq_flag) {
u32 cookie = irq_kill();
if(!irq_flag)
irq_wait();
irq_restore(cookie);
}
}
#ifdef NAND_SUPPORT_WRITE
void nand_write_page(u32 pageno, void *data, void *ecc) {
irq_flag = 0;
NAND_debug("nand_write_page(%u, %p, %p)\n", pageno, data, ecc);
if ((pageno < 0x200) || (pageno >= NAND_MAX_PAGE)) {
gecko_printf("Error: nand_write to page %d forbidden\n", pageno);
@ -195,14 +207,15 @@ void nand_write_page(u32 pageno, void *data, void *ecc) {
ahb_flush_to(AHB_NAND);
__nand_set_address(0, pageno);
__nand_setup_dma(data, ecc);
nand_send_command(NAND_WRITE_PRE, 0x1f, NAND_FLAGS_IRQ | NAND_FLAGS_WR | NAND_FLAGS_ECC, 0x840);
nand_send_command(NAND_WRITE_PRE, 0x1f, NAND_FLAGS_WR, 0x840);
__nand_wait();
nand_send_command(NAND_WRITE_POST, 0, NAND_FLAGS_IRQ | NAND_FLAGS_WAIT, 0);
}
#endif
#ifdef NAND_SUPPORT_ERASE
void nand_erase_block(u32 pageno) {
irq_flag = 0;
NAND_debug("nand_erase_block(%d)\n", pageno);
if ((pageno < 0x200) || (pageno >= NAND_MAX_PAGE)) {
gecko_printf("Error: nand_erase to page %d forbidden\n", pageno);
@ -210,6 +223,7 @@ void nand_erase_block(u32 pageno) {
}
__nand_set_address(0, pageno);
nand_send_command(NAND_ERASE_PRE, 0x1c, 0, 0);
__nand_wait();
nand_send_command(NAND_ERASE_POST, 0, NAND_FLAGS_IRQ | NAND_FLAGS_WAIT, 0);
NAND_debug("nand_erase_block(%d) done\n", pageno);