diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2019-08-25 18:45:29 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2019-08-25 18:45:29 +0200 |
| commit | a8c50a79437006bdde702d09408df8749f48a45a (patch) | |
| tree | f5f98c372061bb0c0c0e65dd9050e1b4955f2b25 /sys/src/9/port/sdmmc.c | |
| parent | 60ec886191b15c638deaee27a161bbe872590e38 (diff) | |
bcm64: replace emmc2 driver with richard millers sdhc driver
the new driver supports 50MHz highspeed bus mode
and uses ADMA instead of SDMA.
Diffstat (limited to 'sys/src/9/port/sdmmc.c')
| -rw-r--r-- | sys/src/9/port/sdmmc.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sys/src/9/port/sdmmc.c b/sys/src/9/port/sdmmc.c index a153c7ffd..044982de6 100644 --- a/sys/src/9/port/sdmmc.c +++ b/sys/src/9/port/sdmmc.c @@ -28,6 +28,7 @@ enum { GO_IDLE_STATE = 0, ALL_SEND_CID = 2, SEND_RELATIVE_ADDR= 3, + SWITCH_FUNC = 6, SELECT_CARD = 7, SD_SEND_IF_COND = 8, SEND_CSD = 9, @@ -59,6 +60,13 @@ enum { Width1 = 0<<0, Width4 = 2<<0, + /* SWITCH_FUNC */ + Dfltspeed = 0<<0, + Hispeed = 1<<0, + Checkfunc = 0x00FFFFF0, + Setfunc = 0x80FFFFF0, + Funcbytes = 64, + /* OCR (operating conditions register) */ Powerup = 1<<31, }; @@ -167,6 +175,27 @@ mmcenable(SDev* dev) return 1; } +static void +mmcswitchfunc(SDio *io, int arg) +{ + uchar *buf; + int n; + u32int r[4]; + + n = Funcbytes; + buf = sdmalloc(n); + if(waserror()){ + print("mmcswitchfunc error\n"); + sdfree(buf); + nexterror(); + } + io->iosetup(0, buf, n, 1); + io->cmd(SWITCH_FUNC, arg, r); + io->io(0, buf, n); + sdfree(buf); + poperror(); +} + static int mmconline(SDunit *unit) { @@ -220,6 +249,12 @@ mmconline(SDunit *unit) io->cmd(SET_BLOCKLEN, unit->secsize, r); io->cmd(APP_CMD, ctl->rca<<Rcashift, r); io->cmd(SET_BUS_WIDTH, Width4, r); + if(strcmp(io->name, "sdhc") == 0){ + if(!waserror()){ + mmcswitchfunc(io, Hispeed|Setfunc); + poperror(); + } + } poperror(); return 1; } |