diff options
| author | Andrew Baumann <Andrew.Baumann@microsoft.com> | 2016-02-18 14:16:19 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-02-18 14:50:50 +0000 |
| commit | 4481bbc79d2ae6041094797243972efd08b2f6b0 (patch) | |
| tree | 04bf55f75b221dc31959618b916987f34151e235 /hw/sd | |
| parent | 6002915e0c3a6e30dfab18606f23f3149800be18 (diff) | |
hw/sd: implement CMD23 (SET_BLOCK_COUNT) for MMC compatibility
CMD23 is optional for SD but required for MMC, and the UEFI bootloader
used for Windows on Raspberry Pi 2 issues it.
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Message-id: 1454902521-21164-2-git-send-email-Andrew.Baumann@microsoft.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/sd')
| -rw-r--r-- | hw/sd/sd.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/hw/sd/sd.c b/hw/sd/sd.c index 8902cd818d..8dd6f39ecb 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -98,6 +98,7 @@ struct SDState { int32_t wpgrps_size; uint64_t size; uint32_t blk_len; + uint32_t multi_blk_cnt; uint32_t erase_start; uint32_t erase_end; uint8_t pwd[16]; @@ -430,6 +431,7 @@ static void sd_reset(DeviceState *dev) sd->blk_len = 0x200; sd->pwd_len = 0; sd->expecting_acmd = false; + sd->multi_blk_cnt = 0; } static bool sd_get_inserted(SDState *sd) @@ -489,6 +491,7 @@ static const VMStateDescription sd_vmstate = { VMSTATE_UINT32(vhs, SDState), VMSTATE_BITMAP(wp_groups, SDState, 0, wpgrps_size), VMSTATE_UINT32(blk_len, SDState), + VMSTATE_UINT32(multi_blk_cnt, SDState), VMSTATE_UINT32(erase_start, SDState), VMSTATE_UINT32(erase_end, SDState), VMSTATE_UINT8_ARRAY(pwd, SDState, 16), @@ -699,6 +702,12 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, rca = req.arg >> 16; } + /* CMD23 (set block count) must be immediately followed by CMD18 or CMD25 + * if not, its effects are cancelled */ + if (sd->multi_blk_cnt != 0 && !(req.cmd == 18 || req.cmd == 25)) { + sd->multi_blk_cnt = 0; + } + DPRINTF("CMD%d 0x%08x state %d\n", req.cmd, req.arg, sd->state); switch (req.cmd) { /* Basic commands (Class 0 and Class 1) */ @@ -994,6 +1003,17 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, } break; + case 23: /* CMD23: SET_BLOCK_COUNT */ + switch (sd->state) { + case sd_transfer_state: + sd->multi_blk_cnt = req.arg; + return sd_r1; + + default: + break; + } + break; + /* Block write commands (Class 4) */ case 24: /* CMD24: WRITE_SINGLE_BLOCK */ if (sd->spi) @@ -1594,6 +1614,14 @@ void sd_write_data(SDState *sd, uint8_t value) sd->csd[14] |= 0x40; /* Bzzzzzzztt .... Operation complete. */ + if (sd->multi_blk_cnt != 0) { + if (--sd->multi_blk_cnt == 0) { + /* Stop! */ + sd->state = sd_transfer_state; + break; + } + } + sd->state = sd_receivingdata_state; } break; @@ -1740,6 +1768,15 @@ uint8_t sd_read_data(SDState *sd) if (sd->data_offset >= io_len) { sd->data_start += io_len; sd->data_offset = 0; + + if (sd->multi_blk_cnt != 0) { + if (--sd->multi_blk_cnt == 0) { + /* Stop! */ + sd->state = sd_transfer_state; + break; + } + } + if (sd->data_start + io_len > sd->size) { sd->card_status |= ADDRESS_ERROR; break; |