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sd_card: Support multiple DMA descriptors

This commit is contained in:
Sebastian Sumpf 2013-03-25 16:10:23 +01:00 committed by Norman Feske
parent 3f9bf7e5dd
commit bdc15a4f28
1 changed files with 25 additions and 9 deletions
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34
os/src/drivers/sd_card/exynos5/dwmmc.h
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@ -164,6 +164,12 @@ struct Dwmmc : Genode::Mmio
struct Fixed_burst : Bitfield<1, 1> { };
struct Idmac_enable : Bitfield<7, 1> { };
};
/**
* Poll demant register
*/
struct Pldmnd : Register<0x84> { };
struct Idsts : Register<0x8c> { };
struct Idinten : Register<0x90, true> { };
@ -177,9 +183,8 @@ struct Dwmmc : Genode::Mmio
*/
struct Clksel : Register<0x9c> { };
struct Emmc_ddr_req : Register<0x10c, true>
{
};
struct Emmc_ddr_req : Register<0x10c, true> { };
typedef Genode::size_t size_t;
void powerup()
@ -275,9 +280,11 @@ struct Exynos5_msh_controller : private Dwmmc, Sd_card::Host_controller
{
enum Flags {
NONE = 0,
DIC = 1 << 1,
LD = 1 << 2,
FS = 1 << 3,
CH = 1 << 4,
ER = 1 << 5,
OWN = 1 << 31,
};
@ -288,13 +295,15 @@ struct Exynos5_msh_controller : private Dwmmc, Sd_card::Host_controller
size_t set(size_t block_count, Genode::addr_t phys_addr, Flags flag)
{
flags = OWN | CH | flag | (block_count <= 8 ? LD : 0);
bytes = ((block_count < 8) ? block_count : 8) * BLOCK_SIZE;
enum { MAX_BLOCKS = 8 };
flags = OWN | flag | (block_count <= MAX_BLOCKS ? LD : (CH | DIC));
bytes = ((block_count < MAX_BLOCKS) ? block_count : MAX_BLOCKS) * BLOCK_SIZE;
addr = phys_addr;
next = (unsigned)&next + sizeof(unsigned);
return block_count < 8 ? 0 : block_count - 8;
return block_count < MAX_BLOCKS ? 0 : block_count - MAX_BLOCKS;
}
void dump() { PDBG("this: %p f: %x bytes: %u, addr: %x next: %x", this, flags, bytes, addr, next); }
};
/*
@ -429,10 +438,15 @@ struct Exynos5_msh_controller : private Dwmmc, Sd_card::Host_controller
Idmac_desc::Flags flags = Idmac_desc::FS;
size_t b = block_count;
for (int index = 0; b;
index++, phys_addr += 0x1000, flags = Idmac_desc::NONE)
int index = 0;
for (index = 0; b;
index++, phys_addr += 0x1000, flags = Idmac_desc::NONE) {
b = _idmac_desc[index].set(b, phys_addr, flags);
_idmac_desc[index].next = _idmac_desc_phys + ((index + 1) * sizeof(Idmac_desc));
}
_idmac_desc[index].next = (unsigned)_idmac_desc;
_idmac_desc[index].flags |= Idmac_desc::ER;
write<Dbaddr>(_idmac_desc_phys);
write<Ctrl::Dma_enable>(1);
@ -444,6 +458,8 @@ struct Exynos5_msh_controller : private Dwmmc, Sd_card::Host_controller
write<Blksize>(BLOCK_SIZE);
write<Bytcnt>(BLOCK_SIZE * block_count);
write<Pldmnd>(1);
return true;
}