diff options
| author | Sai Pavan Boddu <sai.pavan.boddu@xilinx.com> | 2022-05-25 09:21:22 +0200 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <philmd@linaro.org> | 2024-07-16 20:28:28 +0200 |
| commit | 8f25b74a32316b718884796459921696cd43f048 (patch) | |
| tree | 6ae531273060e1a1c2755987dfc0f4d996169598 /hw/sd/sd.c | |
| parent | c3561ab6249322893273707016b2b2253d0e89c3 (diff) | |
| download | focaccia-qemu-8f25b74a32316b718884796459921696cd43f048.tar.gz focaccia-qemu-8f25b74a32316b718884796459921696cd43f048.zip | |
hw/sd/sdcard: Add mmc SWITCH function support (CMD6)
switch operation in mmc cards, updated the ext_csd register to request changes in card operations. Here we implement similar sequence but requests are mostly dummy and make no change. Implement SWITCH_ERROR if the write operation offset goes beyond length of ext_csd. Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> [PMD: Convert to SDProto handlers, add trace events] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Tested-by: Andrew Jeffery <andrew@codeconstruct.com.au> Tested-by: Cédric Le Goater <clg@redhat.com> Message-Id: <20240712162719.88165-11-philmd@linaro.org>
Diffstat (limited to 'hw/sd/sd.c')
| -rw-r--r-- | hw/sd/sd.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/hw/sd/sd.c b/hw/sd/sd.c index d49b144214..1f16c16fd1 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -642,6 +642,7 @@ static bool sd_req_rca_same(SDState *s, SDRequest req) FIELD(CSR, AKE_SEQ_ERROR, 3, 1) FIELD(CSR, APP_CMD, 5, 1) FIELD(CSR, FX_EVENT, 6, 1) +FIELD(CSR, SWITCH_ERROR, 7, 1) FIELD(CSR, READY_FOR_DATA, 8, 1) FIELD(CSR, CURRENT_STATE, 9, 4) FIELD(CSR, ERASE_RESET, 13, 1) @@ -1091,6 +1092,47 @@ static uint32_t sd_wpbits(SDState *sd, uint64_t addr) return ret; } +enum ExtCsdAccessMode { + EXT_CSD_ACCESS_MODE_COMMAND_SET = 0, + EXT_CSD_ACCESS_MODE_SET_BITS = 1, + EXT_CSD_ACCESS_MODE_CLEAR_BITS = 2, + EXT_CSD_ACCESS_MODE_WRITE_BYTE = 3 +}; + +static void emmc_function_switch(SDState *sd, uint32_t arg) +{ + uint8_t access = extract32(arg, 24, 2); + uint8_t index = extract32(arg, 16, 8); + uint8_t value = extract32(arg, 8, 8); + uint8_t b = sd->ext_csd[index]; + + trace_sdcard_switch(access, index, value, extract32(arg, 0, 2)); + + if (index >= 192) { + qemu_log_mask(LOG_GUEST_ERROR, "MMC switching illegal offset\n"); + sd->card_status |= R_CSR_SWITCH_ERROR_MASK; + return; + } + + switch (access) { + case EXT_CSD_ACCESS_MODE_COMMAND_SET: + qemu_log_mask(LOG_UNIMP, "MMC Command set switching not supported\n"); + return; + case EXT_CSD_ACCESS_MODE_SET_BITS: + b |= value; + break; + case EXT_CSD_ACCESS_MODE_CLEAR_BITS: + b &= ~value; + break; + case EXT_CSD_ACCESS_MODE_WRITE_BYTE: + b = value; + break; + } + + trace_sdcard_ext_csd_update(index, sd->ext_csd[index], b); + sd->ext_csd[index] = b; +} + static void sd_function_switch(SDState *sd, uint32_t arg) { int i, mode, new_func; @@ -1402,6 +1444,19 @@ static sd_rsp_type_t sd_cmd_SWITCH_FUNCTION(SDState *sd, SDRequest req) return sd_cmd_to_sendingdata(sd, req, 0, NULL, 64); } +static sd_rsp_type_t emmc_cmd_SWITCH(SDState *sd, SDRequest req) +{ + switch (sd->state) { + case sd_transfer_state: + sd->state = sd_programming_state; + emmc_function_switch(sd, req.arg); + sd->state = sd_transfer_state; + return sd_r1b; + default: + return sd_invalid_state_for_cmd(sd, req); + } +} + /* CMD7 */ static sd_rsp_type_t sd_cmd_DE_SELECT_CARD(SDState *sd, SDRequest req) { @@ -2581,6 +2636,7 @@ static const SDProto sd_proto_emmc = { [3] = {0, sd_ac, "SET_RELATIVE_ADDR", emmc_cmd_SET_RELATIVE_ADDR}, [4] = {0, sd_bc, "SEND_DSR", sd_cmd_unimplemented}, [5] = {0, sd_ac, "SLEEP/AWAKE", emmc_cmd_sleep_awake}, + [6] = {10, sd_adtc, "SWITCH", emmc_cmd_SWITCH}, [7] = {0, sd_ac, "(DE)SELECT_CARD", sd_cmd_DE_SELECT_CARD}, [8] = {0, sd_adtc, "SEND_EXT_CSD", emmc_cmd_SEND_EXT_CSD}, [9] = {0, sd_ac, "SEND_CSD", sd_cmd_SEND_CSD}, |