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Re: [Qemu-arm] [Qemu-devel] [PATCH 3/3] aspeed/smc: rename aspeed_smc_fl
From: |
Andrew Jeffery |
Subject: |
Re: [Qemu-arm] [Qemu-devel] [PATCH 3/3] aspeed/smc: rename aspeed_smc_flash_send_addr() to aspeed_smc_flash_setup() |
Date: |
Mon, 25 Jun 2018 15:43:00 +0930 |
On Tue, 12 Jun 2018, at 16:27, Cédric Le Goater wrote:
> Also handle the fake transfers for dummy bytes in this setup
> routine. It will be useful when we activate MMIO execution.
>
> Signed-off-by: Cédric Le Goater <address@hidden>
Reviewed-by: Andrew Jeffery <address@hidden>
> ---
> hw/ssi/aspeed_smc.c | 31 ++++++++++++++++---------------
> 1 file changed, 16 insertions(+), 15 deletions(-)
>
> diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
> index b15370893583..b29bfd3124a9 100644
> --- a/hw/ssi/aspeed_smc.c
> +++ b/hw/ssi/aspeed_smc.c
> @@ -503,10 +503,11 @@ static int aspeed_smc_flash_dummies(const
> AspeedSMCFlash *fl)
> return dummies;
> }
>
> -static void aspeed_smc_flash_send_addr(AspeedSMCFlash *fl, uint32_t addr)
> +static void aspeed_smc_flash_setup(AspeedSMCFlash *fl, uint32_t addr)
> {
> const AspeedSMCState *s = fl->controller;
> uint8_t cmd = aspeed_smc_flash_cmd(fl);
> + int i;
>
> /* Flash access can not exceed CS segment */
> addr = aspeed_smc_check_segment_addr(fl, addr);
> @@ -519,6 +520,18 @@ static void
> aspeed_smc_flash_send_addr(AspeedSMCFlash *fl, uint32_t addr)
> ssi_transfer(s->spi, (addr >> 16) & 0xff);
> ssi_transfer(s->spi, (addr >> 8) & 0xff);
> ssi_transfer(s->spi, (addr & 0xff));
> +
> + /*
> + * Use fake transfers to model dummy bytes. The value should
> + * be configured to some non-zero value in fast read mode and
> + * zero in read mode. But, as the HW allows inconsistent
> + * settings, let's check for fast read mode.
> + */
> + if (aspeed_smc_flash_mode(fl) == CTRL_FREADMODE) {
> + for (i = 0; i < aspeed_smc_flash_dummies(fl); i++) {
> + ssi_transfer(fl->controller->spi, 0xFF);
> + }
> + }
> }
>
> static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr addr,
> unsigned size)
> @@ -537,19 +550,7 @@ static uint64_t aspeed_smc_flash_read(void *opaque,
> hwaddr addr, unsigned size)
> case CTRL_READMODE:
> case CTRL_FREADMODE:
> aspeed_smc_flash_select(fl);
> - aspeed_smc_flash_send_addr(fl, addr);
> -
> - /*
> - * Use fake transfers to model dummy bytes. The value should
> - * be configured to some non-zero value in fast read mode and
> - * zero in read mode. But, as the HW allows inconsistent
> - * settings, let's check for fast read mode.
> - */
> - if (aspeed_smc_flash_mode(fl) == CTRL_FREADMODE) {
> - for (i = 0; i < aspeed_smc_flash_dummies(fl); i++) {
> - ssi_transfer(fl->controller->spi, 0xFF);
> - }
> - }
> + aspeed_smc_flash_setup(fl, addr);
>
> for (i = 0; i < size; i++) {
> ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
> @@ -586,7 +587,7 @@ static void aspeed_smc_flash_write(void *opaque,
> hwaddr addr, uint64_t data,
> break;
> case CTRL_WRITEMODE:
> aspeed_smc_flash_select(fl);
> - aspeed_smc_flash_send_addr(fl, addr);
> + aspeed_smc_flash_setup(fl, addr);
>
> for (i = 0; i < size; i++) {
> ssi_transfer(s->spi, (data >> (8 * i)) & 0xff);
> --
> 2.13.6
>
>
- [Qemu-arm] [PATCH 0/3] aspeed/smc: small fixes, Cédric Le Goater, 2018/06/12
- [Qemu-arm] [PATCH 1/3] aspeed/smc: fix dummy cycles count when in dual IO mode, Cédric Le Goater, 2018/06/12
- [Qemu-arm] [PATCH 2/3] aspeed/smc: fix HW strapping, Cédric Le Goater, 2018/06/12
- [Qemu-arm] [PATCH 3/3] aspeed/smc: rename aspeed_smc_flash_send_addr() to aspeed_smc_flash_setup(), Cédric Le Goater, 2018/06/12
- Re: [Qemu-arm] [Qemu-devel] [PATCH 3/3] aspeed/smc: rename aspeed_smc_flash_send_addr() to aspeed_smc_flash_setup(),
Andrew Jeffery <=
- Re: [Qemu-arm] [PATCH 0/3] aspeed/smc: small fixes, Peter Maydell, 2018/06/20
- Re: [Qemu-arm] [PATCH 0/3] aspeed/smc: small fixes, Peter Maydell, 2018/06/25