| Message ID | 20180831111555.15008-2-clg@kaod.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | aspeed: misc fixes and enhancements (SMC) | expand |
On 8/31/18 8:15 AM, Cédric Le Goater wrote: > The SMC controllers have a register containing the byte that will be > used as dummy output. It can be modified by software. > > Signed-off-by: Cédric Le Goater <clg@kaod.org> > --- > hw/ssi/aspeed_smc.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c > index da2fedfcd3cd..f31bbc895caa 100644 > --- a/hw/ssi/aspeed_smc.c > +++ b/hw/ssi/aspeed_smc.c > @@ -102,8 +102,8 @@ > /* Misc Control Register #1 */ > #define R_MISC_CTRL1 (0x50 / 4) > > -/* Misc Control Register #2 */ > -#define R_MISC_CTRL2 (0x54 / 4) > +/* SPI dummy cycle data */ > +#define R_DUMMY_DATA (0x54 / 4) > > /* DMA Control/Status Register */ > #define R_DMA_CTRL (0x80 / 4) > @@ -548,7 +548,7 @@ static void aspeed_smc_flash_setup(AspeedSMCFlash *fl, uint32_t addr) > */ > if (aspeed_smc_flash_mode(fl) == CTRL_FREADMODE) { > for (i = 0; i < aspeed_smc_flash_dummies(fl); i++) { > - ssi_transfer(fl->controller->spi, 0xFF); > + ssi_transfer(fl->controller->spi, s->regs[R_DUMMY_DATA] & 0xff); The DUMMY_DATA register always contains a 8-bit value, so this AND shouldn't be necessary. Regardless: Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> > } > } > } > @@ -680,6 +680,7 @@ static uint64_t aspeed_smc_read(void *opaque, hwaddr addr, unsigned int size) > addr == s->r_timings || > addr == s->r_ce_ctrl || > addr == R_INTR_CTRL || > + addr == R_DUMMY_DATA || > (s->ctrl->has_dma && addr == R_DMA_CTRL) || > (s->ctrl->has_dma && addr == R_DMA_FLASH_ADDR) || > (s->ctrl->has_dma && addr == R_DMA_DRAM_ADDR) || > @@ -912,6 +913,8 @@ static void aspeed_smc_write(void *opaque, hwaddr addr, uint64_t data, > } > } else if (addr == R_INTR_CTRL) { > s->regs[addr] = value; > + } else if (addr == R_DUMMY_DATA) { > + s->regs[addr] = value & 0xff ; > } else if (s->ctrl->has_dma && addr == R_DMA_CTRL) { > aspeed_smc_dma_ctrl(s, value); > } else if (s->ctrl->has_dma && addr == R_DMA_DRAM_ADDR) { >
diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c index da2fedfcd3cd..f31bbc895caa 100644 --- a/hw/ssi/aspeed_smc.c +++ b/hw/ssi/aspeed_smc.c @@ -102,8 +102,8 @@ /* Misc Control Register #1 */ #define R_MISC_CTRL1 (0x50 / 4) -/* Misc Control Register #2 */ -#define R_MISC_CTRL2 (0x54 / 4) +/* SPI dummy cycle data */ +#define R_DUMMY_DATA (0x54 / 4) /* DMA Control/Status Register */ #define R_DMA_CTRL (0x80 / 4) @@ -548,7 +548,7 @@ static void aspeed_smc_flash_setup(AspeedSMCFlash *fl, uint32_t addr) */ if (aspeed_smc_flash_mode(fl) == CTRL_FREADMODE) { for (i = 0; i < aspeed_smc_flash_dummies(fl); i++) { - ssi_transfer(fl->controller->spi, 0xFF); + ssi_transfer(fl->controller->spi, s->regs[R_DUMMY_DATA] & 0xff); } } } @@ -680,6 +680,7 @@ static uint64_t aspeed_smc_read(void *opaque, hwaddr addr, unsigned int size) addr == s->r_timings || addr == s->r_ce_ctrl || addr == R_INTR_CTRL || + addr == R_DUMMY_DATA || (s->ctrl->has_dma && addr == R_DMA_CTRL) || (s->ctrl->has_dma && addr == R_DMA_FLASH_ADDR) || (s->ctrl->has_dma && addr == R_DMA_DRAM_ADDR) || @@ -912,6 +913,8 @@ static void aspeed_smc_write(void *opaque, hwaddr addr, uint64_t data, } } else if (addr == R_INTR_CTRL) { s->regs[addr] = value; + } else if (addr == R_DUMMY_DATA) { + s->regs[addr] = value & 0xff ; } else if (s->ctrl->has_dma && addr == R_DMA_CTRL) { aspeed_smc_dma_ctrl(s, value); } else if (s->ctrl->has_dma && addr == R_DMA_DRAM_ADDR) {
The SMC controllers have a register containing the byte that will be used as dummy output. It can be modified by software. Signed-off-by: Cédric Le Goater <clg@kaod.org> --- hw/ssi/aspeed_smc.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)