Re: [Qemu-devel] [PATCH v2 5/6] hw/sd/ssi-sd: use the SDBus API, connect the SDCard to the bus

[Alistair Francis <alistair.francis@xilinx.com>]

On Mon, Jan 22, 2018 at 7:58 PM, Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
> On reset the bus will reset the card,
> we can now drop the device_reset() call.
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>

Alistair

> ---
>  hw/sd/ssi-sd.c | 32 +++++++++++++++++++-------------
>  1 file changed, 19 insertions(+), 13 deletions(-)
>
> diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
> index f88f509e0a..ae04b6641b 100644
> --- a/hw/sd/ssi-sd.c
> +++ b/hw/sd/ssi-sd.c
> @@ -47,7 +47,7 @@ typedef struct {
>      int32_t arglen;
>      int32_t response_pos;
>      int32_t stopping;
> -    SDState *sd;
> +    SDBus sdbus;
>  } ssi_sd_state;
>
>  #define TYPE_SSI_SD "ssi-sd"
> @@ -100,7 +100,7 @@ static uint32_t ssi_sd_transfer(SSISlave *dev, uint32_t val)
>              request.arg = (s->cmdarg[0] << 24) | (s->cmdarg[1] << 16)
>                             | (s->cmdarg[2] << 8) | s->cmdarg[3];
>              DPRINTF("CMD%d arg 0x%08x\n", s->cmd, request.arg);
> -            s->arglen = sd_do_command(s->sd, &request, longresp);
> +            s->arglen = sdbus_do_command(&s->sdbus, &request, longresp);
>              if (s->arglen <= 0) {
>                  s->arglen = 1;
>                  s->response[0] = 4;
> @@ -177,7 +177,7 @@ static uint32_t ssi_sd_transfer(SSISlave *dev, uint32_t val)
>              DPRINTF("Response 0x%02x\n", s->response[s->response_pos]);
>              return s->response[s->response_pos++];
>          }
> -        if (sd_data_ready(s->sd)) {
> +        if (sdbus_data_ready(&s->sdbus)) {
>              DPRINTF("Data read\n");
>              s->mode = SSI_SD_DATA_START;
>          } else {
> @@ -190,8 +190,8 @@ static uint32_t ssi_sd_transfer(SSISlave *dev, uint32_t val)
>          s->mode = SSI_SD_DATA_READ;
>          return 0xfe;
>      case SSI_SD_DATA_READ:
> -        val = sd_read_data(s->sd);
> -        if (!sd_data_ready(s->sd)) {
> +        val = sdbus_read_data(&s->sdbus);
> +        if (!sdbus_data_ready(&s->sdbus)) {
>              DPRINTF("Data read end\n");
>              s->mode = SSI_SD_CMD;
>          }
> @@ -242,13 +242,24 @@ static const VMStateDescription vmstate_ssi_sd = {
>  static void ssi_sd_realize(SSISlave *d, Error **errp)
>  {
>      ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, d);
> +    DeviceState *carddev;
>      DriveInfo *dinfo;
> +    Error *err = NULL;
>
> +    qbus_create_inplace(&s->sdbus, sizeof(s->sdbus), TYPE_SD_BUS,
> +                        DEVICE(d), "sd-bus");
> +
> +    /* Create and plug in the sd card */
>      /* FIXME use a qdev drive property instead of drive_get_next() */
>      dinfo = drive_get_next(IF_SD);
> -    s->sd = sd_init(dinfo ? blk_by_legacy_dinfo(dinfo) : NULL, true);
> -    if (s->sd == NULL) {
> -        error_setg(errp, "Device initialization failed.");
> +    carddev = qdev_create(&s->sdbus.qbus, TYPE_SD_CARD);
> +    if (dinfo) {
> +        qdev_prop_set_drive(carddev, "drive", blk_by_legacy_dinfo(dinfo), &err);
> +    }
> +    object_property_set_bool(OBJECT(carddev), true, "spi", &err);
> +    object_property_set_bool(OBJECT(carddev), true, "realized", &err);
> +    if (err) {
> +        error_setg(errp, "failed to init SD card: %s", error_get_pretty(err));
>          return;
>      }
>  }
> @@ -264,11 +275,6 @@ static void ssi_sd_reset(DeviceState *dev)
>      s->arglen = 0;
>      s->response_pos = 0;
>      s->stopping = 0;
> -
> -    /* Since we're still using the legacy SD API the card is not plugged
> -     * into any bus, and we must reset it manually.
> -     */
> -    device_reset(DEVICE(s->sd));
>  }
>
>  static void ssi_sd_class_init(ObjectClass *klass, void *data)
> --
> 2.15.1
>
>