diff mbox series

[v42,42/98] hw/sd/sdcard: Remove SEND_DSR dead case (CMD4)

Message ID 20240628070216.92609-43-philmd@linaro.org
State Superseded
Headers show
Series hw/sd/sdcard: Add eMMC support | expand

Commit Message

Philippe Mathieu-Daudé June 28, 2024, 7:01 a.m. UTC
The CSD::CSR_IMP bit defines whether the Driver Stage
Register (DSR) is implemented or not. We do not set
this bit in CSD:

    static void sd_set_csd(SDState *sd, uint64_t size)
    {
        ...
        if (size <= SDSC_MAX_CAPACITY) { /* Standard Capacity SD */
            ...
            sd->csd[6] = 0xe0 |     /* Partial block for read allowed */
                ((csize >> 10) & 0x03);
            ...
        } else {                    /* SDHC */
            ...
            sd->csd[6] = 0x00;
            ...
        }
        ...
    }

The sd_normal_command() switch case for the SEND_DSR
command do nothing and fallback to "illegal command".
Since the command is mandatory (although the register
isn't...) call the sd_cmd_unimplemented() handler.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/sd/sd.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

Comments

Cédric Le Goater June 28, 2024, 7:55 a.m. UTC | #1
On 6/28/24 9:01 AM, Philippe Mathieu-Daudé wrote:
> The CSD::CSR_IMP bit defines whether the Driver Stage
> Register (DSR) is implemented or not. We do not set
> this bit in CSD:
> 
>      static void sd_set_csd(SDState *sd, uint64_t size)
>      {
>          ...
>          if (size <= SDSC_MAX_CAPACITY) { /* Standard Capacity SD */
>              ...
>              sd->csd[6] = 0xe0 |     /* Partial block for read allowed */
>                  ((csize >> 10) & 0x03);
>              ...
>          } else {                    /* SDHC */
>              ...
>              sd->csd[6] = 0x00;
>              ...
>          }
>          ...
>      }
> 
> The sd_normal_command() switch case for the SEND_DSR
> command do nothing and fallback to "illegal command".
> Since the command is mandatory (although the register
> isn't...) call the sd_cmd_unimplemented() handler.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>


Reviewed-by: Cédric Le Goater <clg@redhat.com>

Thanks,

C.


> ---
>   hw/sd/sd.c | 14 ++------------
>   1 file changed, 2 insertions(+), 12 deletions(-)
> 
> diff --git a/hw/sd/sd.c b/hw/sd/sd.c
> index a816493d37..097cb0f2e2 100644
> --- a/hw/sd/sd.c
> +++ b/hw/sd/sd.c
> @@ -240,7 +240,7 @@ static const char *sd_response_name(sd_rsp_type_t rsp)
>   static const char *sd_cmd_name(SDState *sd, uint8_t cmd)
>   {
>       static const char *cmd_abbrev[SDMMC_CMD_MAX] = {
> -         [4]    = "SET_DSR",                 [5]    = "IO_SEND_OP_COND",
> +                                             [5]    = "IO_SEND_OP_COND",
>            [6]    = "SWITCH_FUNC",             [7]    = "SELECT/DESELECT_CARD",
>            [8]    = "SEND_IF_COND",            [9]    = "SEND_CSD",
>           [10]    = "SEND_CID",               [11]    = "VOLTAGE_SWITCH",
> @@ -1153,7 +1153,6 @@ static sd_rsp_type_t sd_cmd_illegal(SDState *sd, SDRequest req)
>   }
>   
>   /* Commands that are recognised but not yet implemented. */
> -__attribute__((unused))
>   static sd_rsp_type_t sd_cmd_unimplemented(SDState *sd, SDRequest req)
>   {
>       qemu_log_mask(LOG_UNIMP, "%s: CMD%i not implemented\n",
> @@ -1312,16 +1311,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
>   
>       switch (req.cmd) {
>       /* Basic commands (Class 0 and Class 1) */
> -    case 4:  /* CMD4:   SEND_DSR */
> -        switch (sd->state) {
> -        case sd_standby_state:
> -            break;
> -
> -        default:
> -            break;
> -        }
> -        break;
> -
>       case 6:  /* CMD6:   SWITCH_FUNCTION */
>           if (sd->mode != sd_data_transfer_mode) {
>               return sd_invalid_mode_for_cmd(sd, req);
> @@ -2289,6 +2278,7 @@ static const SDProto sd_proto_sd = {
>           [0]  = {0,  sd_bc,   "GO_IDLE_STATE", sd_cmd_GO_IDLE_STATE},
>           [2]  = {0,  sd_bcr,  "ALL_SEND_CID", sd_cmd_ALL_SEND_CID},
>           [3]  = {0,  sd_bcr,  "SEND_RELATIVE_ADDR", sd_cmd_SEND_RELATIVE_ADDR},
> +        [4]  = {0,  sd_bc,   "SEND_DSR", sd_cmd_unimplemented},
>           [19] = {2,  sd_adtc, "SEND_TUNING_BLOCK", sd_cmd_SEND_TUNING_BLOCK},
>           [23] = {2,  sd_ac,   "SET_BLOCK_COUNT", sd_cmd_SET_BLOCK_COUNT},
>       },
diff mbox series

Patch

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index a816493d37..097cb0f2e2 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -240,7 +240,7 @@  static const char *sd_response_name(sd_rsp_type_t rsp)
 static const char *sd_cmd_name(SDState *sd, uint8_t cmd)
 {
     static const char *cmd_abbrev[SDMMC_CMD_MAX] = {
-         [4]    = "SET_DSR",                 [5]    = "IO_SEND_OP_COND",
+                                             [5]    = "IO_SEND_OP_COND",
          [6]    = "SWITCH_FUNC",             [7]    = "SELECT/DESELECT_CARD",
          [8]    = "SEND_IF_COND",            [9]    = "SEND_CSD",
         [10]    = "SEND_CID",               [11]    = "VOLTAGE_SWITCH",
@@ -1153,7 +1153,6 @@  static sd_rsp_type_t sd_cmd_illegal(SDState *sd, SDRequest req)
 }
 
 /* Commands that are recognised but not yet implemented. */
-__attribute__((unused))
 static sd_rsp_type_t sd_cmd_unimplemented(SDState *sd, SDRequest req)
 {
     qemu_log_mask(LOG_UNIMP, "%s: CMD%i not implemented\n",
@@ -1312,16 +1311,6 @@  static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
 
     switch (req.cmd) {
     /* Basic commands (Class 0 and Class 1) */
-    case 4:  /* CMD4:   SEND_DSR */
-        switch (sd->state) {
-        case sd_standby_state:
-            break;
-
-        default:
-            break;
-        }
-        break;
-
     case 6:  /* CMD6:   SWITCH_FUNCTION */
         if (sd->mode != sd_data_transfer_mode) {
             return sd_invalid_mode_for_cmd(sd, req);
@@ -2289,6 +2278,7 @@  static const SDProto sd_proto_sd = {
         [0]  = {0,  sd_bc,   "GO_IDLE_STATE", sd_cmd_GO_IDLE_STATE},
         [2]  = {0,  sd_bcr,  "ALL_SEND_CID", sd_cmd_ALL_SEND_CID},
         [3]  = {0,  sd_bcr,  "SEND_RELATIVE_ADDR", sd_cmd_SEND_RELATIVE_ADDR},
+        [4]  = {0,  sd_bc,   "SEND_DSR", sd_cmd_unimplemented},
         [19] = {2,  sd_adtc, "SEND_TUNING_BLOCK", sd_cmd_SEND_TUNING_BLOCK},
         [23] = {2,  sd_ac,   "SET_BLOCK_COUNT", sd_cmd_SET_BLOCK_COUNT},
     },