From 8f25b74a32316b718884796459921696cd43f048 Mon Sep 17 00:00:00 2001 From: Sai Pavan Boddu Date: Wed, 25 May 2022 09:21:22 +0200 Subject: [PATCH] hw/sd/sdcard: Add mmc SWITCH function support (CMD6) MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Edgar E. Iglesias Signed-off-by: Cédric Le Goater Reviewed-by: Philippe Mathieu-Daudé [PMD: Convert to SDProto handlers, add trace events] Signed-off-by: Philippe Mathieu-Daudé Tested-by: Andrew Jeffery Tested-by: Cédric Le Goater Message-Id: <20240712162719.88165-11-philmd@linaro.org> --- hw/sd/sd.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/sd/trace-events | 2 ++ 2 files changed, 58 insertions(+) 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}, diff --git a/hw/sd/trace-events b/hw/sd/trace-events index 5dfe6be7b7..43671dc791 100644 --- a/hw/sd/trace-events +++ b/hw/sd/trace-events @@ -57,6 +57,8 @@ sdcard_write_block(uint64_t addr, uint32_t len) "addr 0x%" PRIx64 " size 0x%x" sdcard_write_data(const char *proto, const char *cmd_desc, uint8_t cmd, uint32_t offset, uint8_t value) "%s %20s/ CMD%02d ofs %"PRIu32" value 0x%02x" sdcard_read_data(const char *proto, const char *cmd_desc, uint8_t cmd, uint32_t offset, uint64_t size, uint32_t blklen) "%s %20s/ CMD%02d ofs %"PRIu32" size %"PRIu64" blklen %" PRIu32 sdcard_set_voltage(uint16_t millivolts) "%u mV" +sdcard_ext_csd_update(unsigned index, uint8_t oval, uint8_t nval) "index %u: 0x%02x -> 0x%02x" +sdcard_switch(unsigned access, unsigned index, unsigned value, unsigned set) "SWITCH acc:%u idx:%u val:%u set:%u" # pxa2xx_mmci.c pxa2xx_mmci_read(uint8_t size, uint32_t addr, uint32_t value) "size %d addr 0x%02x value 0x%08x" -- 2.11.4.GIT