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Code Issues Releases Wiki Activity

Fix parallel-style programmer access from ITE IT87/Winbond W83627 SPI

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The ITE IT87 SPI driver uses a trick to speed up reading and writing:
If a flash chip is 512 kByte or less, the flash chip can be completely
mapped in memory and both read and write accesses are faster that way.
The current IT87 SPI code did use the parallel programmer interface for
memory mapped reads and writes, but that's the wrong abstraction. It has
been fixed to use mmio_read*/mmio_write* for that purpose.

The Winbond W83627 SPI driver uses the same trick in its read path for
all supported chip sizes. Fix it the same way.

Switch internal_chip_readn to use mmio_readn as proper abstraction.

Kudos to Michael Karcher for spotting the bugs.

Tested-by: Johan Svensson <flashrom.js@crypt.se>

Corresponding to flashrom svn r1511.

Reported-by: Johan Svensson <flashrom.js@crypt.se>
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
This commit is contained in:
Carl-Daniel Hailfinger 2012-03-01 22:38:27 +00:00
parent 8ee180d911
commit ccd71c2122
5 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
hwaccess.c
View File

@ -169,6 +169,12 @@ uint32_t mmio_readl(void *addr)
return *(volatile uint32_t *) addr;
}
void mmio_readn(void *addr, uint8_t *buf, size_t len)
{
memcpy(buf, addr, len);
return;
}
void mmio_le_writeb(uint8_t val, void *addr)
{
mmio_writeb(cpu_to_le8(val), addr);

2
internal.c
View File

@ -387,6 +387,6 @@ static uint32_t internal_chip_readl(const struct flashctx *flash,
static void internal_chip_readn(const struct flashctx *flash, uint8_t *buf,
const chipaddr addr, size_t len)
{
memcpy(buf, (void *)addr, len);
mmio_readn((void *)addr, buf, len);
return;
}

4
it87spi.c
View File

@ -330,7 +330,7 @@ static int it8716f_spi_page_program(struct flashctx *flash, uint8_t *buf,
OUTB(0x06, it8716f_flashport + 1);
OUTB(((2 + (fast_spi ? 1 : 0)) << 4), it8716f_flashport);
for (i = 0; i < flash->page_size; i++)
chip_writeb(flash, buf[i], bios + start + i);
mmio_writeb(buf[i], (void *)(bios + start + i));
OUTB(0, it8716f_flashport);
/* Wait until the Write-In-Progress bit is cleared.
* This usually takes 1-10 ms, so wait in 1 ms steps.
@ -356,7 +356,7 @@ static int it8716f_spi_chip_read(struct flashctx *flash, uint8_t *buf,
if ((flash->total_size * 1024 > 512 * 1024)) {
spi_read_chunked(flash, buf, start, len, 3);
} else {
read_memmapped(flash, buf, start, len);
mmio_readn((void *)(flash->virtual_memory + start), buf, len);
}
return 0;

1
programmer.h
View File

@ -312,6 +312,7 @@ void mmio_writel(uint32_t val, void *addr);
uint8_t mmio_readb(void *addr);
uint16_t mmio_readw(void *addr);
uint32_t mmio_readl(void *addr);
void mmio_readn(void *addr, uint8_t *buf, size_t len);
void mmio_le_writeb(uint8_t val, void *addr);
void mmio_le_writew(uint16_t val, void *addr);
void mmio_le_writel(uint32_t val, void *addr);

3
wbsio_spi.c
View File

@ -202,7 +202,8 @@ static int wbsio_spi_send_command(struct flashctx *flash, unsigned int writecnt,
static int wbsio_spi_read(struct flashctx *flash, uint8_t *buf,
unsigned int start, unsigned int len)
{
return read_memmapped(flash, buf, start, len);
mmio_readn((void *)(flash->virtual_memory + start), buf, len);
return 0;
}
#endif