bcm64: replace emmc2 driver with richard millers sdhc driver
the new driver supports 50MHz highspeed bus mode and uses ADMA instead of SDMA.
This commit is contained in:
cinap_lenrek
parent
60ec886191
commit
a8c50a7943
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@ -1,413 +0,0 @@
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/*
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* external mass media controller (mmc / sd host interface)
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*
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* derived from Richard Miller's bcm/emmc.c
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*/
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#include "u.h"
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#include "../port/lib.h"
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#include "../port/error.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "../port/sd.h"
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enum {
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Initfreq = 400000, /* initialisation frequency for MMC */
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SDfreq = 25000000, /* standard SD frequency */
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DTO = 14, /* data timeout exponent (guesswork) */
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MMCSelect = 7, /* mmc/sd card select command */
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Setbuswidth = 6, /* mmc/sd set bus width command */
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};
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enum {
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/* Controller registers */
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Sysaddr = 0x00>>2,
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Blksizecnt = 0x04>>2,
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Arg1 = 0x08>>2,
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Cmdtm = 0x0c>>2,
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Resp0 = 0x10>>2,
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Resp1 = 0x14>>2,
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Resp2 = 0x18>>2,
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Resp3 = 0x1c>>2,
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Data = 0x20>>2,
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Status = 0x24>>2,
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Control0 = 0x28>>2,
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Control1 = 0x2c>>2,
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Interrupt = 0x30>>2,
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Irptmask = 0x34>>2,
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Irpten = 0x38>>2,
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Control2 = 0x3c>>2,
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Capabilities = 0x40>>2,
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Forceirpt = 0x50>>2,
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Boottimeout = 0x60>>2,
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Dbgsel = 0x64>>2,
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Spiintspt = 0xf0>>2,
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Slotisrver = 0xfc>>2,
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/* Control0 */
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Dwidth4 = 1<<1,
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Dwidth1 = 0<<1,
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/* Control1 */
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Srstdata = 1<<26, /* reset data circuit */
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Srstcmd = 1<<25, /* reset command circuit */
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Srsthc = 1<<24, /* reset complete host controller */
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Datatoshift = 16, /* data timeout unit exponent */
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Datatomask = 0xF0000,
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Clkfreq8shift = 8, /* SD clock base divider LSBs */
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Clkfreq8mask = 0xFF00,
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Clkfreqms2shift = 6, /* SD clock base divider MSBs */
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Clkfreqms2mask = 0xC0,
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Clkgendiv = 0<<5, /* SD clock divided */
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Clkgenprog = 1<<5, /* SD clock programmable */
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Clken = 1<<2, /* SD clock enable */
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Pllen = 1<<3,
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Clkstable = 1<<1,
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Clkintlen = 1<<0, /* enable internal EMMC clocks */
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/* Cmdtm */
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Indexshift = 24,
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Suspend = 1<<22,
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Resume = 2<<22,
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Abort = 3<<22,
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Isdata = 1<<21,
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Ixchken = 1<<20,
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Crcchken = 1<<19,
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Respmask = 3<<16,
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Respnone = 0<<16,
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Resp136 = 1<<16,
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Resp48 = 2<<16,
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Resp48busy = 3<<16,
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Multiblock = 1<<5,
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Host2card = 0<<4,
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Card2host = 1<<4,
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Autocmd12 = 1<<2,
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Autocmd23 = 2<<2,
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Blkcnten = 1<<1,
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Dmaen = 1<<0,
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/* Interrupt */
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Acmderr = 1<<24,
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Denderr = 1<<22,
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Dcrcerr = 1<<21,
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Dtoerr = 1<<20,
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Cbaderr = 1<<19,
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Cenderr = 1<<18,
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Ccrcerr = 1<<17,
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Ctoerr = 1<<16,
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Err = 1<<15,
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Cardintr = 1<<8,
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Cardinsert = 1<<6,
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Readrdy = 1<<5,
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Writerdy = 1<<4,
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Dmaintr = 1<<3,
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Datadone = 1<<1,
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Cmddone = 1<<0,
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/* Status */
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Present = 1<<18,
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Bufread = 1<<11,
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Bufwrite = 1<<10,
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Readtrans = 1<<9,
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Writetrans = 1<<8,
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Datactive = 1<<2,
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Datinhibit = 1<<1,
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Cmdinhibit = 1<<0,
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};
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static int cmdinfo[64] = {
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[0] Ixchken,
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[2] Resp136,
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[3] Resp48 | Ixchken | Crcchken,
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[6] Resp48 | Ixchken | Crcchken,
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[7] Resp48busy | Ixchken | Crcchken,
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[8] Resp48 | Ixchken | Crcchken,
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[9] Resp136,
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[12] Resp48busy | Ixchken | Crcchken,
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[13] Resp48 | Ixchken | Crcchken,
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[16] Resp48,
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[17] Resp48 | Isdata | Card2host | Ixchken | Crcchken | Dmaen,
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[18] Resp48 | Isdata | Card2host | Multiblock | Blkcnten | Ixchken | Crcchken | Dmaen,
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[24] Resp48 | Isdata | Host2card | Ixchken | Crcchken | Dmaen,
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[25] Resp48 | Isdata | Host2card | Multiblock | Blkcnten | Ixchken | Crcchken | Dmaen,
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[41] Resp48,
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[55] Resp48 | Ixchken | Crcchken,
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};
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typedef struct Ctlr Ctlr;
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struct Ctlr {
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Rendez r;
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u32int *regs;
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int datadone;
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int fastclock;
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ulong extclk;
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int irq;
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};
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static Ctlr emmc;
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static uint
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clkdiv(uint d)
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{
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uint v;
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assert(d < 1<<10);
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v = (d << Clkfreq8shift) & Clkfreq8mask;
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v |= ((d >> 8) << Clkfreqms2shift) & Clkfreqms2mask;
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return v;
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}
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static void
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interrupt(Ureg*, void*)
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{
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u32int *r;
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u32int i;
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r = emmc.regs;
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i = r[Interrupt];
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r[Interrupt] = i & (Datadone|Err);
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emmc.datadone = i;
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wakeup(&emmc.r);
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}
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static int
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datadone(void*)
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{
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return emmc.datadone;
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}
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static int
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emmcinit(void)
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{
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u32int *r;
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int i;
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emmc.extclk = getclkrate(ClkEmmc2);
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emmc.irq = IRQmmc;
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r = (u32int*)(VIRTIO + 0x340000);
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emmc.regs = r;
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r[Control1] = Srsthc;
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for(i = 0; i < 100; i++){
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delay(10);
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if((r[Control1] & Srsthc) == 0)
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return 0;
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}
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print("emmc: reset timeout!\n");
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return -1;
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}
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static int
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emmcinquiry(char *inquiry, int inqlen)
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{
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uint ver;
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ver = emmc.regs[Slotisrver] >> 16;
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return snprint(inquiry, inqlen,
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"eMMC SD Host Controller %2.2x Version %2.2x",
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ver&0xFF, ver>>8);
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}
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static void
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emmcenable(void)
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{
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int i;
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emmc.regs[Control1] = clkdiv(emmc.extclk / Initfreq - 1) | DTO << Datatoshift |
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Clkgendiv | Clken | Clkintlen;
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for(i = 0; i < 1000; i++){
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delay(1);
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if(emmc.regs[Control1] & Clkstable)
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break;
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}
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if(i == 1000)
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print("SD clock won't initialise!\n");
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emmc.regs[Control1] |= Pllen;
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for(i = 0; i < 1000; i++){
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delay(1);
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if(emmc.regs[Control1] & Clkstable)
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break;
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}
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if(i == 1000)
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print("PLL clock won't initialise!\n");
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emmc.regs[Control0] = (emmc.regs[Control0] & ~0xFF00) | 0xF00; // VDD1 bus power to 3.3V
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emmc.regs[Irptmask] = ~(Dtoerr|Cardintr|Dmaintr);
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intrenable(emmc.irq, interrupt, nil, BUSUNKNOWN, sdio.name);
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}
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static int
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emmccmd(u32int cmd, u32int arg, u32int *resp)
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{
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ulong now;
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u32int *r;
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u32int c;
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u32int i;
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assert(cmd < nelem(cmdinfo) && cmdinfo[cmd] != 0);
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c = (cmd << Indexshift) | cmdinfo[cmd];
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r = emmc.regs;
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if(r[Status] & Cmdinhibit){
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print("emmccmd: need to reset Cmdinhibit intr %ux stat %ux\n",
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r[Interrupt], r[Status]);
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r[Control1] |= Srstcmd;
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while(r[Control1] & Srstcmd)
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;
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while(r[Status] & Cmdinhibit)
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;
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}
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if((c & Isdata || (c & Respmask) == Resp48busy) &&
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r[Status] & Datinhibit){
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print("emmccmd: need to reset Datinhibit intr %ux stat %ux\n",
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r[Interrupt], r[Status]);
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r[Control1] |= Srstdata;
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while(r[Control1] & Srstdata)
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;
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while(r[Status] & Datinhibit)
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;
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}
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r[Arg1] = arg;
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if((i = r[Interrupt]) != 0){
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if(i != Cardinsert)
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print("emmc: before command, intr was %ux\n", i);
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r[Interrupt] = i;
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}
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coherence();
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r[Cmdtm] = c;
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coherence();
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now = m->ticks;
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while(((i=r[Interrupt])&(Cmddone|Err)) == 0)
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if((long)(m->ticks-now) > HZ)
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break;
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if((i&(Cmddone|Err)) != Cmddone){
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if((i&~Err) != Ctoerr)
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print("emmc: cmd %ux error intr %ux stat %ux\n", c, i, r[Status]);
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r[Interrupt] = i;
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if(r[Status]&Cmdinhibit){
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r[Control1] |= Srstcmd;
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while(r[Control1]&Srstcmd)
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;
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}
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error(Eio);
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}
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r[Interrupt] = i & ~(Datadone|Readrdy|Writerdy);
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switch(c & Respmask){
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case Resp136:
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resp[0] = r[Resp0]<<8;
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resp[1] = r[Resp0]>>24 | r[Resp1]<<8;
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resp[2] = r[Resp1]>>24 | r[Resp2]<<8;
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resp[3] = r[Resp2]>>24 | r[Resp3]<<8;
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break;
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case Resp48:
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case Resp48busy:
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resp[0] = r[Resp0];
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break;
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case Respnone:
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resp[0] = 0;
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break;
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}
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if((c & Respmask) == Resp48busy){
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r[Irpten] = Datadone|Err;
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tsleep(&emmc.r, datadone, 0, 3000);
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i = emmc.datadone;
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emmc.datadone = 0;
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r[Irpten] = 0;
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if((i & Datadone) == 0)
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print("emmcio: no Datadone after CMD%d\n", cmd);
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if(i & Err)
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print("emmcio: CMD%d error interrupt %ux\n",
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cmd, r[Interrupt]);
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r[Interrupt] = i;
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}
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/*
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* Once card is selected, use faster clock
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*/
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if(cmd == MMCSelect){
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delay(10);
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r[Control1] = clkdiv(emmc.extclk / SDfreq - 1) |
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DTO << Datatoshift | Clkgendiv | Clken | Clkintlen;
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for(i = 0; i < 1000; i++){
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delay(1);
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if(r[Control1] & Clkstable)
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break;
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}
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delay(10);
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emmc.fastclock = 1;
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}
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/*
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* If card bus width changes, change host bus width
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*/
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if(cmd == Setbuswidth)
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switch(arg){
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case 0:
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r[Control0] &= ~Dwidth4;
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break;
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case 2:
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r[Control0] |= Dwidth4;
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break;
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}
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return 0;
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}
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static void
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emmciosetup(int, void *buf, int bsize, int bcount)
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{
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u32int *r;
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int len;
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len = bsize*bcount;
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if(len > (0x1000<<7))
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error(Etoobig);
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dmaflush(1, buf, len);
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r = emmc.regs;
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r[Sysaddr] = dmaaddr(buf);
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r[Blksizecnt] = 7<<12 | bcount<<16 | bsize;
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r[Irpten] = Datadone|Err;
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}
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static void
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emmcio(int write, uchar *buf, int len)
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{
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u32int *r;
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int i;
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tsleep(&emmc.r, datadone, 0, 3000);
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i = emmc.datadone;
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emmc.datadone = 0;
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r = emmc.regs;
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r[Irpten] = 0;
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if((i & Datadone) == 0){
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print("emmcio: %d timeout intr %ux stat %ux\n",
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write, i, r[Status]);
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r[Interrupt] = i;
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error(Eio);
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}
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if(i & Err){
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print("emmcio: %d error intr %ux stat %ux\n",
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write, r[Interrupt], r[Status]);
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r[Interrupt] = i;
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error(Eio);
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}
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if(i)
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r[Interrupt] = i;
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if(!write)
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dmaflush(0, buf, len);
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}
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SDio sdio = {
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"emmc2",
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emmcinit,
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emmcenable,
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emmcinquiry,
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emmccmd,
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emmciosetup,
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emmcio,
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};
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@ -45,7 +45,7 @@ ip
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misc
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uartmini
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uartpl011
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sdmmc emmc2
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sdmmc sdhc
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dma
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gic
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vcore
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565
sys/src/9/bcm64/sdhc.c
Normal file
565
sys/src/9/bcm64/sdhc.c
Normal file
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@ -0,0 +1,565 @@
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/*
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* bcm2711 sd host controller
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*
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* Copyright © 2012,2019 Richard Miller <r.miller@acm.org>
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*
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* adapted from emmc.c - the two should really be merged
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*/
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#include "u.h"
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#include "../port/lib.h"
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#include "../port/error.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "../port/sd.h"
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#define EMMCREGS (VIRTIO+0x340000)
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enum {
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Extfreq = 100*Mhz, /* guess external clock frequency if */
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/* not available from vcore */
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Initfreq = 400000, /* initialisation frequency for MMC */
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SDfreq = 25*Mhz, /* standard SD frequency */
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SDfreqhs = 50*Mhz, /* high speed frequency */
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DTO = 14, /* data timeout exponent (guesswork) */
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GoIdle = 0, /* mmc/sdio go idle state */
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MMCSelect = 7, /* mmc/sd card select command */
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Setbuswidth = 6, /* mmc/sd set bus width command */
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Switchfunc = 6, /* mmc/sd switch function command */
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Voltageswitch = 11, /* md/sdio switch to 1.8V */
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IORWdirect = 52, /* sdio read/write direct command */
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IORWextended = 53, /* sdio read/write extended command */
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Appcmd = 55, /* mmc/sd application command prefix */
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};
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enum {
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/* Controller registers */
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SDMAaddr = 0x00>>2,
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Blksizecnt = 0x04>>2,
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Arg1 = 0x08>>2,
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Cmdtm = 0x0c>>2,
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Resp0 = 0x10>>2,
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Resp1 = 0x14>>2,
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Resp2 = 0x18>>2,
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Resp3 = 0x1c>>2,
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Data = 0x20>>2,
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Status = 0x24>>2,
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Control0 = 0x28>>2,
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Control1 = 0x2c>>2,
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Interrupt = 0x30>>2,
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Irptmask = 0x34>>2,
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Irpten = 0x38>>2,
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Control2 = 0x3c>>2,
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Capability = 0x40>>2,
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Forceirpt = 0x50>>2,
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Dmadesc = 0x58>>2,
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Boottimeout = 0x70>>2,
|
||||
Dbgsel = 0x74>>2,
|
||||
Exrdfifocfg = 0x80>>2,
|
||||
Exrdfifoen = 0x84>>2,
|
||||
Tunestep = 0x88>>2,
|
||||
Tunestepsstd = 0x8c>>2,
|
||||
Tunestepsddr = 0x90>>2,
|
||||
Spiintspt = 0xf0>>2,
|
||||
Slotisrver = 0xfc>>2,
|
||||
|
||||
/* Control0 */
|
||||
Busvoltage = 7<<9,
|
||||
V1_8 = 5<<9,
|
||||
V3_0 = 6<<9,
|
||||
V3_3 = 7<<9,
|
||||
Buspower = 1<<8,
|
||||
Dwidth8 = 1<<5,
|
||||
Dmaselect = 3<<3,
|
||||
DmaSDMA = 0<<3,
|
||||
DmaADMA1 = 1<<3,
|
||||
DmaADMA2 = 2<<3,
|
||||
Hispeed = 1<<2,
|
||||
Dwidth4 = 1<<1,
|
||||
Dwidth1 = 0<<1,
|
||||
LED = 1<<0,
|
||||
|
||||
/* Control1 */
|
||||
Srstdata = 1<<26, /* reset data circuit */
|
||||
Srstcmd = 1<<25, /* reset command circuit */
|
||||
Srsthc = 1<<24, /* reset complete host controller */
|
||||
Datatoshift = 16, /* data timeout unit exponent */
|
||||
Datatomask = 0xF0000,
|
||||
Clkfreq8shift = 8, /* SD clock base divider LSBs */
|
||||
Clkfreq8mask = 0xFF00,
|
||||
Clkfreqms2shift = 6, /* SD clock base divider MSBs */
|
||||
Clkfreqms2mask = 0xC0,
|
||||
Clkgendiv = 0<<5, /* SD clock divided */
|
||||
Clkgenprog = 1<<5, /* SD clock programmable */
|
||||
Clken = 1<<2, /* SD clock enable */
|
||||
Clkstable = 1<<1,
|
||||
Clkintlen = 1<<0, /* enable internal EMMC clocks */
|
||||
|
||||
/* Cmdtm */
|
||||
Indexshift = 24,
|
||||
Suspend = 1<<22,
|
||||
Resume = 2<<22,
|
||||
Abort = 3<<22,
|
||||
Isdata = 1<<21,
|
||||
Ixchken = 1<<20,
|
||||
Crcchken = 1<<19,
|
||||
Respmask = 3<<16,
|
||||
Respnone = 0<<16,
|
||||
Resp136 = 1<<16,
|
||||
Resp48 = 2<<16,
|
||||
Resp48busy = 3<<16,
|
||||
Multiblock = 1<<5,
|
||||
Host2card = 0<<4,
|
||||
Card2host = 1<<4,
|
||||
Autocmd12 = 1<<2,
|
||||
Autocmd23 = 2<<2,
|
||||
Blkcnten = 1<<1,
|
||||
Dmaen = 1<<0,
|
||||
|
||||
/* Interrupt */
|
||||
Admaerr = 1<<25,
|
||||
Acmderr = 1<<24,
|
||||
Denderr = 1<<22,
|
||||
Dcrcerr = 1<<21,
|
||||
Dtoerr = 1<<20,
|
||||
Cbaderr = 1<<19,
|
||||
Cenderr = 1<<18,
|
||||
Ccrcerr = 1<<17,
|
||||
Ctoerr = 1<<16,
|
||||
Err = 1<<15,
|
||||
Cardintr = 1<<8,
|
||||
Cardinsert = 1<<6, /* not in Broadcom datasheet */
|
||||
Readrdy = 1<<5,
|
||||
Writerdy = 1<<4,
|
||||
Dmaintr = 1<<3,
|
||||
Datadone = 1<<1,
|
||||
Cmddone = 1<<0,
|
||||
|
||||
/* Status */
|
||||
Bufread = 1<<11, /* not in Broadcom datasheet */
|
||||
Bufwrite = 1<<10, /* not in Broadcom datasheet */
|
||||
Readtrans = 1<<9,
|
||||
Writetrans = 1<<8,
|
||||
Datactive = 1<<2,
|
||||
Datinhibit = 1<<1,
|
||||
Cmdinhibit = 1<<0,
|
||||
};
|
||||
|
||||
static int cmdinfo[64] = {
|
||||
[0] Ixchken,
|
||||
[2] Resp136,
|
||||
[3] Resp48 | Ixchken | Crcchken,
|
||||
[5] Resp48,
|
||||
[6] Resp48 | Ixchken | Crcchken,
|
||||
[7] Resp48busy | Ixchken | Crcchken,
|
||||
[8] Resp48 | Ixchken | Crcchken,
|
||||
[9] Resp136,
|
||||
[11] Resp48 | Ixchken | Crcchken,
|
||||
[12] Resp48busy | Ixchken | Crcchken,
|
||||
[13] Resp48 | Ixchken | Crcchken,
|
||||
[16] Resp48,
|
||||
[17] Resp48 | Isdata | Card2host | Ixchken | Crcchken,
|
||||
[18] Resp48 | Isdata | Card2host | Multiblock | Blkcnten | Ixchken | Crcchken,
|
||||
[24] Resp48 | Isdata | Host2card | Ixchken | Crcchken,
|
||||
[25] Resp48 | Isdata | Host2card | Multiblock | Blkcnten | Ixchken | Crcchken,
|
||||
[41] Resp48,
|
||||
[52] Resp48 | Ixchken | Crcchken,
|
||||
[53] Resp48 | Ixchken | Crcchken | Isdata,
|
||||
[55] Resp48 | Ixchken | Crcchken,
|
||||
};
|
||||
|
||||
typedef struct Adma Adma;
|
||||
typedef struct Ctlr Ctlr;
|
||||
|
||||
/*
|
||||
* ADMA2 descriptor
|
||||
* See SD Host Controller Simplified Specification Version 2.00
|
||||
*/
|
||||
|
||||
struct Adma {
|
||||
u32int desc;
|
||||
u32int addr;
|
||||
};
|
||||
|
||||
enum {
|
||||
/* desc fields */
|
||||
Valid = 1<<0,
|
||||
End = 1<<1,
|
||||
Int = 1<<2,
|
||||
Nop = 0<<4,
|
||||
Tran = 2<<4,
|
||||
Link = 3<<4,
|
||||
OLength = 16,
|
||||
/* maximum value for Length field */
|
||||
Maxdma = ((1<<16) - 4),
|
||||
};
|
||||
|
||||
struct Ctlr {
|
||||
Rendez r;
|
||||
Rendez cardr;
|
||||
int fastclock;
|
||||
ulong extclk;
|
||||
int appcmd;
|
||||
Adma *dma;
|
||||
};
|
||||
|
||||
static Ctlr emmc;
|
||||
|
||||
static void mmcinterrupt(Ureg*, void*);
|
||||
|
||||
static void
|
||||
WR(int reg, u32int val)
|
||||
{
|
||||
u32int *r = (u32int*)EMMCREGS;
|
||||
|
||||
if(0)print("WR %2.2ux %ux\n", reg<<2, val);
|
||||
coherence();
|
||||
r[reg] = val;
|
||||
}
|
||||
|
||||
static uint
|
||||
clkdiv(uint d)
|
||||
{
|
||||
uint v;
|
||||
|
||||
assert(d < 1<<10);
|
||||
v = (d << Clkfreq8shift) & Clkfreq8mask;
|
||||
v |= ((d >> 8) << Clkfreqms2shift) & Clkfreqms2mask;
|
||||
return v;
|
||||
}
|
||||
|
||||
static Adma*
|
||||
dmaalloc(void *addr, int len)
|
||||
{
|
||||
int n;
|
||||
uintptr a;
|
||||
Adma *adma, *p;
|
||||
|
||||
a = (uintptr)addr;
|
||||
n = (len + Maxdma-1) / Maxdma;
|
||||
adma = sdmalloc(n * sizeof(Adma));
|
||||
for(p = adma; len > 0; p++){
|
||||
p->desc = Valid | Tran;
|
||||
if(n == 1)
|
||||
p->desc |= len<<OLength | End | Int;
|
||||
else
|
||||
p->desc |= Maxdma<<OLength;
|
||||
p->addr = dmaaddr((void*)a);
|
||||
a += Maxdma;
|
||||
len -= Maxdma;
|
||||
n--;
|
||||
}
|
||||
cachedwbse(adma, (char*)p - (char*)adma);
|
||||
return adma;
|
||||
}
|
||||
|
||||
static void
|
||||
emmcclk(uint freq)
|
||||
{
|
||||
u32int *r;
|
||||
uint div;
|
||||
int i;
|
||||
|
||||
r = (u32int*)EMMCREGS;
|
||||
div = emmc.extclk / (freq<<1);
|
||||
if(emmc.extclk / (div<<1) > freq)
|
||||
div++;
|
||||
WR(Control1, clkdiv(div) |
|
||||
DTO<<Datatoshift | Clkgendiv | Clken | Clkintlen);
|
||||
for(i = 0; i < 1000; i++){
|
||||
delay(1);
|
||||
if(r[Control1] & Clkstable)
|
||||
break;
|
||||
}
|
||||
if(i == 1000)
|
||||
print("emmc: can't set clock to %ud\n", freq);
|
||||
}
|
||||
|
||||
static int
|
||||
datadone(void*)
|
||||
{
|
||||
int i;
|
||||
|
||||
u32int *r = (u32int*)EMMCREGS;
|
||||
i = r[Interrupt];
|
||||
return i & (Datadone|Err);
|
||||
}
|
||||
|
||||
static int
|
||||
emmcinit(void)
|
||||
{
|
||||
u32int *r;
|
||||
ulong clk;
|
||||
|
||||
clk = getclkrate(ClkEmmc2);
|
||||
if(clk == 0){
|
||||
clk = Extfreq;
|
||||
print("emmc: assuming external clock %lud Mhz\n", clk/1000000);
|
||||
}
|
||||
emmc.extclk = clk;
|
||||
r = (u32int*)EMMCREGS;
|
||||
if(0)print("emmc control %8.8ux %8.8ux %8.8ux\n",
|
||||
r[Control0], r[Control1], r[Control2]);
|
||||
WR(Control1, Srsthc);
|
||||
delay(10);
|
||||
while(r[Control1] & Srsthc)
|
||||
;
|
||||
WR(Control1, Srstdata);
|
||||
delay(10);
|
||||
WR(Control1, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
emmcinquiry(char *inquiry, int inqlen)
|
||||
{
|
||||
u32int *r;
|
||||
uint ver;
|
||||
|
||||
r = (u32int*)EMMCREGS;
|
||||
ver = r[Slotisrver] >> 16;
|
||||
return snprint(inquiry, inqlen,
|
||||
"BCM SD Host Controller %2.2x Version %2.2x",
|
||||
ver&0xFF, ver>>8);
|
||||
}
|
||||
|
||||
static void
|
||||
emmcenable(void)
|
||||
{
|
||||
|
||||
WR(Control0, 0);
|
||||
delay(1);
|
||||
WR(Control0, V3_3 | Buspower | Dwidth1 | DmaADMA2);
|
||||
WR(Control1, 0);
|
||||
delay(1);
|
||||
emmcclk(Initfreq);
|
||||
WR(Irpten, 0);
|
||||
WR(Irptmask, ~(Cardintr|Dmaintr));
|
||||
WR(Interrupt, ~0);
|
||||
intrenable(IRQmmc, mmcinterrupt, nil, BUSUNKNOWN, "sdhc");
|
||||
}
|
||||
|
||||
static int
|
||||
emmccmd(u32int cmd, u32int arg, u32int *resp)
|
||||
{
|
||||
u32int *r;
|
||||
u32int c;
|
||||
int i;
|
||||
ulong now;
|
||||
|
||||
r = (u32int*)EMMCREGS;
|
||||
assert(cmd < nelem(cmdinfo) && cmdinfo[cmd] != 0);
|
||||
c = (cmd << Indexshift) | cmdinfo[cmd];
|
||||
/*
|
||||
* CMD6 may be Setbuswidth or Switchfunc depending on Appcmd prefix
|
||||
*/
|
||||
if(cmd == Switchfunc && !emmc.appcmd)
|
||||
c |= Isdata|Card2host;
|
||||
if(c & Isdata)
|
||||
c |= Dmaen;
|
||||
if(cmd == IORWextended){
|
||||
if(arg & (1<<31))
|
||||
c |= Host2card;
|
||||
else
|
||||
c |= Card2host;
|
||||
if((r[Blksizecnt]&0xFFFF0000) != 0x10000)
|
||||
c |= Multiblock | Blkcnten;
|
||||
}
|
||||
/*
|
||||
* GoIdle indicates new card insertion: reset bus width & speed
|
||||
*/
|
||||
if(cmd == GoIdle){
|
||||
WR(Control0, r[Control0] & ~(Dwidth4|Hispeed));
|
||||
emmcclk(Initfreq);
|
||||
}
|
||||
if(r[Status] & Cmdinhibit){
|
||||
print("emmccmd: need to reset Cmdinhibit intr %ux stat %ux\n",
|
||||
r[Interrupt], r[Status]);
|
||||
WR(Control1, r[Control1] | Srstcmd);
|
||||
while(r[Control1] & Srstcmd)
|
||||
;
|
||||
while(r[Status] & Cmdinhibit)
|
||||
;
|
||||
}
|
||||
if((r[Status] & Datinhibit) &&
|
||||
((c & Isdata) || (c & Respmask) == Resp48busy)){
|
||||
print("emmccmd: need to reset Datinhibit intr %ux stat %ux\n",
|
||||
r[Interrupt], r[Status]);
|
||||
WR(Control1, r[Control1] | Srstdata);
|
||||
while(r[Control1] & Srstdata)
|
||||
;
|
||||
while(r[Status] & Datinhibit)
|
||||
;
|
||||
}
|
||||
WR(Arg1, arg);
|
||||
if((i = (r[Interrupt] & ~Cardintr)) != 0){
|
||||
if(i != Cardinsert)
|
||||
print("emmc: before command, intr was %ux\n", i);
|
||||
WR(Interrupt, i);
|
||||
}
|
||||
WR(Cmdtm, c);
|
||||
now = m->ticks;
|
||||
while(((i=r[Interrupt])&(Cmddone|Err)) == 0)
|
||||
if(m->ticks-now > HZ)
|
||||
break;
|
||||
if((i&(Cmddone|Err)) != Cmddone){
|
||||
if((i&~(Err|Cardintr)) != Ctoerr)
|
||||
print("emmc: cmd %ux arg %ux error intr %ux stat %ux\n", c, arg, i, r[Status]);
|
||||
WR(Interrupt, i);
|
||||
if(r[Status]&Cmdinhibit){
|
||||
WR(Control1, r[Control1]|Srstcmd);
|
||||
while(r[Control1]&Srstcmd)
|
||||
;
|
||||
}
|
||||
error(Eio);
|
||||
}
|
||||
WR(Interrupt, i & ~(Datadone|Readrdy|Writerdy));
|
||||
switch(c & Respmask){
|
||||
case Resp136:
|
||||
resp[0] = r[Resp0]<<8;
|
||||
resp[1] = r[Resp0]>>24 | r[Resp1]<<8;
|
||||
resp[2] = r[Resp1]>>24 | r[Resp2]<<8;
|
||||
resp[3] = r[Resp2]>>24 | r[Resp3]<<8;
|
||||
break;
|
||||
case Resp48:
|
||||
case Resp48busy:
|
||||
resp[0] = r[Resp0];
|
||||
break;
|
||||
case Respnone:
|
||||
resp[0] = 0;
|
||||
break;
|
||||
}
|
||||
if((c & Respmask) == Resp48busy){
|
||||
WR(Irpten, r[Irpten]|Datadone|Err);
|
||||
tsleep(&emmc.r, datadone, 0, 3000);
|
||||
i = r[Interrupt];
|
||||
if((i & Datadone) == 0)
|
||||
print("emmcio: no Datadone after CMD%d\n", cmd);
|
||||
if(i & Err)
|
||||
print("emmcio: CMD%d error interrupt %ux\n",
|
||||
cmd, r[Interrupt]);
|
||||
WR(Interrupt, i);
|
||||
}
|
||||
/*
|
||||
* Once card is selected, use faster clock
|
||||
*/
|
||||
if(cmd == MMCSelect){
|
||||
delay(1);
|
||||
emmcclk(SDfreq);
|
||||
delay(1);
|
||||
emmc.fastclock = 1;
|
||||
}
|
||||
if(cmd == Setbuswidth){
|
||||
if(emmc.appcmd){
|
||||
/*
|
||||
* If card bus width changes, change host bus width
|
||||
*/
|
||||
switch(arg){
|
||||
case 0:
|
||||
WR(Control0, r[Control0] & ~Dwidth4);
|
||||
break;
|
||||
case 2:
|
||||
WR(Control0, r[Control0] | Dwidth4);
|
||||
break;
|
||||
}
|
||||
}else{
|
||||
/*
|
||||
* If card switched into high speed mode, increase clock speed
|
||||
*/
|
||||
if((arg&0x8000000F) == 0x80000001){
|
||||
delay(1);
|
||||
emmcclk(SDfreqhs);
|
||||
delay(1);
|
||||
}
|
||||
}
|
||||
}else if(cmd == IORWdirect && (arg & ~0xFF) == (1<<31|0<<28|7<<9)){
|
||||
switch(arg & 0x3){
|
||||
case 0:
|
||||
WR(Control0, r[Control0] & ~Dwidth4);
|
||||
break;
|
||||
case 2:
|
||||
WR(Control0, r[Control0] | Dwidth4);
|
||||
//WR(Control0, r[Control0] | Hispeed);
|
||||
break;
|
||||
}
|
||||
}
|
||||
emmc.appcmd = (cmd == Appcmd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
emmciosetup(int write, void *buf, int bsize, int bcount)
|
||||
{
|
||||
int len;
|
||||
|
||||
len = bsize * bcount;
|
||||
assert(((uintptr)buf&3) == 0);
|
||||
assert((len&3) == 0);
|
||||
assert(bsize <= 2048);
|
||||
WR(Blksizecnt, bcount<<16 | bsize);
|
||||
if(emmc.dma)
|
||||
sdfree(emmc.dma);
|
||||
emmc.dma = dmaalloc(buf, len);
|
||||
if(write)
|
||||
cachedwbse(buf, len);
|
||||
else
|
||||
cachedwbinvse(buf, len);
|
||||
WR(Dmadesc, dmaaddr(emmc.dma));
|
||||
okay(1);
|
||||
}
|
||||
|
||||
static void
|
||||
emmcio(int write, uchar *buf, int len)
|
||||
{
|
||||
u32int *r;
|
||||
int i;
|
||||
|
||||
r = (u32int*)EMMCREGS;
|
||||
if(waserror()){
|
||||
okay(0);
|
||||
nexterror();
|
||||
}
|
||||
WR(Irpten, r[Irpten] | Datadone|Err);
|
||||
tsleep(&emmc.r, datadone, 0, 3000);
|
||||
WR(Irpten, r[Irpten] & ~(Datadone|Err));
|
||||
i = r[Interrupt];
|
||||
if((i & (Datadone|Err)) != Datadone){
|
||||
print("sdhc: %s error intr %ux stat %ux\n",
|
||||
write? "write" : "read", i, r[Status]);
|
||||
WR(Interrupt, i);
|
||||
error(Eio);
|
||||
}
|
||||
WR(Interrupt, i);
|
||||
if(!write)
|
||||
cachedinvse(buf, len);
|
||||
poperror();
|
||||
okay(0);
|
||||
}
|
||||
|
||||
static void
|
||||
mmcinterrupt(Ureg*, void*)
|
||||
{
|
||||
u32int *r;
|
||||
int i;
|
||||
|
||||
r = (u32int*)EMMCREGS;
|
||||
i = r[Interrupt];
|
||||
if(i&(Datadone|Err))
|
||||
wakeup(&emmc.r);
|
||||
if(i&Cardintr)
|
||||
wakeup(&emmc.cardr);
|
||||
WR(Irpten, r[Irpten] & ~i);
|
||||
}
|
||||
|
||||
SDio sdio = {
|
||||
"sdhc",
|
||||
emmcinit,
|
||||
emmcenable,
|
||||
emmcinquiry,
|
||||
emmccmd,
|
||||
emmciosetup,
|
||||
emmcio,
|
||||
};
|
||||
|
|
@ -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;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue