bcm2835_sdhci: add some very basic support for rpi4
DMA is currently disabled while I work out why it's broken, but this is enough for upstream U-Boot + rpi-firmware + our rpi3-psci-monitor to boot with the right config. The RPi 4 is still not in a good "supported" state, as we have no USB/PCI-E/Ethernet drivers, but if air-gapped pies only able to operate over cereal is your thing, here's your guy. Submitted by: Robert Crowston (with modifications)
This commit is contained in:
Kyle Evans
parent
14fb9485a4
commit
939f1d8f5f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=354560
@ -58,9 +58,12 @@ __FBSDID("$FreeBSD$");
|
||||
|
||||
#include "bcm2835_dma.h"
|
||||
#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
|
||||
#include "bcm2835_vcbus.h"
|
||||
#ifdef NOTYET
|
||||
#include <arm/broadcom/bcm2835/bcm2835_clkman.h>
|
||||
#endif
|
||||
|
||||
#define BCM2835_DEFAULT_SDHCI_FREQ 50
|
||||
#define BCM2838_DEFAULT_SDHCI_FREQ 100
|
||||
|
||||
#define BCM_SDHCI_BUFFER_SIZE 512
|
||||
#define NUM_DMA_SEGS 2
|
||||
@ -84,10 +87,40 @@ SYSCTL_INT(_hw_sdhci, OID_AUTO, bcm2835_sdhci_debug, CTLFLAG_RWTUN,
|
||||
static int bcm2835_sdhci_hs = 1;
|
||||
static int bcm2835_sdhci_pio_mode = 0;
|
||||
|
||||
struct bcm_mmc_conf {
|
||||
int clock_id;
|
||||
int clock_src;
|
||||
int default_freq;
|
||||
int power_id;
|
||||
int quirks;
|
||||
bool use_dma;
|
||||
};
|
||||
|
||||
struct bcm_mmc_conf bcm2835_sdhci_conf = {
|
||||
.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC,
|
||||
.clock_src = -1,
|
||||
.default_freq = BCM2835_DEFAULT_SDHCI_FREQ,
|
||||
.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
|
||||
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | SDHCI_QUIRK_DONT_SET_HISPD_BIT |
|
||||
SDHCI_QUIRK_MISSING_CAPS,
|
||||
.use_dma = true
|
||||
};
|
||||
|
||||
struct bcm_mmc_conf bcm2838_emmc2_conf = {
|
||||
.clock_id = BCM2838_MBOX_CLOCK_ID_EMMC2,
|
||||
.clock_src = -1,
|
||||
.default_freq = BCM2838_DEFAULT_SDHCI_FREQ,
|
||||
.quirks = 0,
|
||||
/* XXX DMA is currently broken, but it shouldn't be. */
|
||||
.use_dma = false
|
||||
};
|
||||
|
||||
static struct ofw_compat_data compat_data[] = {
|
||||
{"broadcom,bcm2835-sdhci", 1},
|
||||
{"brcm,bcm2835-sdhci", 1},
|
||||
{"brcm,bcm2835-mmc", 1},
|
||||
{"broadcom,bcm2835-sdhci", (uintptr_t)&bcm2835_sdhci_conf},
|
||||
{"brcm,bcm2835-sdhci", (uintptr_t)&bcm2835_sdhci_conf},
|
||||
{"brcm,bcm2835-mmc", (uintptr_t)&bcm2835_sdhci_conf},
|
||||
{"brcm,bcm2711-emmc2", (uintptr_t)&bcm2838_emmc2_conf},
|
||||
{"brcm,bcm2838-emmc2", (uintptr_t)&bcm2838_emmc2_conf},
|
||||
{NULL, 0}
|
||||
};
|
||||
|
||||
@ -115,6 +148,10 @@ struct bcm_sdhci_softc {
|
||||
uint32_t blksz_and_count;
|
||||
uint32_t cmd_and_mode;
|
||||
bool need_update_blk;
|
||||
#ifdef NOTYET
|
||||
device_t clkman;
|
||||
#endif
|
||||
struct bcm_mmc_conf * conf;
|
||||
};
|
||||
|
||||
static int bcm_sdhci_probe(device_t);
|
||||
@ -168,8 +205,12 @@ bcm_sdhci_attach(device_t dev)
|
||||
sc->sc_dev = dev;
|
||||
sc->sc_req = NULL;
|
||||
|
||||
err = bcm2835_mbox_set_power_state(BCM2835_MBOX_POWER_ID_EMMC,
|
||||
TRUE);
|
||||
sc->conf = (struct bcm_mmc_conf *)ofw_bus_search_compatible(dev,
|
||||
compat_data)->ocd_data;
|
||||
if (sc->conf == 0)
|
||||
return (ENXIO);
|
||||
|
||||
err = bcm2835_mbox_set_power_state(BCM2835_MBOX_POWER_ID_EMMC, TRUE);
|
||||
if (err != 0) {
|
||||
if (bootverbose)
|
||||
device_printf(dev, "Unable to enable the power\n");
|
||||
@ -177,8 +218,7 @@ bcm_sdhci_attach(device_t dev)
|
||||
}
|
||||
|
||||
default_freq = 0;
|
||||
err = bcm2835_mbox_get_clock_rate(BCM2835_MBOX_CLOCK_ID_EMMC,
|
||||
&default_freq);
|
||||
err = bcm2835_mbox_get_clock_rate(sc->conf->clock_id, &default_freq);
|
||||
if (err == 0) {
|
||||
/* Convert to MHz */
|
||||
default_freq /= 1000000;
|
||||
@ -190,10 +230,27 @@ bcm_sdhci_attach(device_t dev)
|
||||
default_freq = cell / 1000000;
|
||||
}
|
||||
if (default_freq == 0)
|
||||
default_freq = BCM2835_DEFAULT_SDHCI_FREQ;
|
||||
default_freq = sc->conf->default_freq;
|
||||
|
||||
if (bootverbose)
|
||||
device_printf(dev, "SDHCI frequency: %dMHz\n", default_freq);
|
||||
#ifdef NOTYET
|
||||
if (sc->conf->clock_src > 0) {
|
||||
uint32_t f;
|
||||
sc->clkman = devclass_get_device(devclass_find("bcm2835_clkman"), 0);
|
||||
if (sc->clkman == NULL) {
|
||||
device_printf(dev, "cannot find Clock Manager\n");
|
||||
return (ENXIO);
|
||||
}
|
||||
|
||||
f = bcm2835_clkman_set_frequency(sc->clkman, sc->conf->clock_src, default_freq);
|
||||
if (f == 0)
|
||||
return (EINVAL);
|
||||
|
||||
if (bootverbose)
|
||||
device_printf(dev, "Clock source frequency: %dMHz\n", f);
|
||||
}
|
||||
#endif
|
||||
|
||||
rid = 0;
|
||||
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
|
||||
@ -209,7 +266,7 @@ bcm_sdhci_attach(device_t dev)
|
||||
|
||||
rid = 0;
|
||||
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
|
||||
RF_ACTIVE);
|
||||
RF_ACTIVE | RF_SHAREABLE);
|
||||
if (!sc->sc_irq_res) {
|
||||
device_printf(dev, "cannot allocate interrupt\n");
|
||||
err = ENXIO;
|
||||
@ -230,36 +287,39 @@ bcm_sdhci_attach(device_t dev)
|
||||
if (bcm2835_sdhci_hs)
|
||||
sc->sc_slot.caps |= SDHCI_CAN_DO_HISPD;
|
||||
sc->sc_slot.caps |= (default_freq << SDHCI_CLOCK_BASE_SHIFT);
|
||||
sc->sc_slot.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK
|
||||
| SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
|
||||
| SDHCI_QUIRK_DONT_SET_HISPD_BIT
|
||||
| SDHCI_QUIRK_MISSING_CAPS;
|
||||
sc->sc_slot.quirks = sc->conf->quirks;
|
||||
|
||||
sdhci_init_slot(dev, &sc->sc_slot, 0);
|
||||
|
||||
sc->sc_dma_ch = bcm_dma_allocate(BCM_DMA_CH_ANY);
|
||||
if (sc->sc_dma_ch == BCM_DMA_CH_INVALID)
|
||||
goto fail;
|
||||
if (sc->conf->use_dma) {
|
||||
sc->sc_dma_ch = bcm_dma_allocate(BCM_DMA_CH_ANY);
|
||||
if (sc->sc_dma_ch == BCM_DMA_CH_INVALID)
|
||||
goto fail;
|
||||
|
||||
bcm_dma_setup_intr(sc->sc_dma_ch, bcm_sdhci_dma_intr, sc);
|
||||
if (bcm_dma_setup_intr(sc->sc_dma_ch, bcm_sdhci_dma_intr, sc) != 0) {
|
||||
device_printf(dev, "cannot setup dma interrupt handler\n");
|
||||
err = ENXIO;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* Allocate bus_dma resources. */
|
||||
err = bus_dma_tag_create(bus_get_dma_tag(dev),
|
||||
1, 0, BUS_SPACE_MAXADDR_32BIT,
|
||||
BUS_SPACE_MAXADDR, NULL, NULL,
|
||||
BCM_SDHCI_BUFFER_SIZE, NUM_DMA_SEGS, BCM_SDHCI_BUFFER_SIZE,
|
||||
BUS_DMA_ALLOCNOW, NULL, NULL,
|
||||
&sc->sc_dma_tag);
|
||||
/* Allocate bus_dma resources. */
|
||||
err = bus_dma_tag_create(bus_get_dma_tag(dev),
|
||||
1, 0, BUS_SPACE_MAXADDR_32BIT,
|
||||
BUS_SPACE_MAXADDR, NULL, NULL,
|
||||
BCM_SDHCI_BUFFER_SIZE, NUM_DMA_SEGS, BCM_SDHCI_BUFFER_SIZE,
|
||||
BUS_DMA_ALLOCNOW, NULL, NULL,
|
||||
&sc->sc_dma_tag);
|
||||
|
||||
if (err) {
|
||||
device_printf(dev, "failed allocate DMA tag");
|
||||
goto fail;
|
||||
}
|
||||
if (err) {
|
||||
device_printf(dev, "failed allocate DMA tag");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
err = bus_dmamap_create(sc->sc_dma_tag, 0, &sc->sc_dma_map);
|
||||
if (err) {
|
||||
device_printf(dev, "bus_dmamap_create failed\n");
|
||||
goto fail;
|
||||
err = bus_dmamap_create(sc->sc_dma_tag, 0, &sc->sc_dma_map);
|
||||
if (err) {
|
||||
device_printf(dev, "bus_dmamap_create failed\n");
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
/* FIXME: Fix along with other BUS_SPACE_PHYSADDR instances */
|
||||
@ -454,26 +514,25 @@ bcm_sdhci_start_dma_seg(struct bcm_sdhci_softc *sc)
|
||||
{
|
||||
struct sdhci_slot *slot;
|
||||
vm_paddr_t pdst, psrc;
|
||||
int err, idx, len, sync_op;
|
||||
int err, idx, len, sync_op, width;
|
||||
|
||||
slot = &sc->sc_slot;
|
||||
idx = sc->dmamap_seg_index++;
|
||||
len = sc->dmamap_seg_sizes[idx];
|
||||
slot->offset += len;
|
||||
width = (len & 0xf ? BCM_DMA_32BIT : BCM_DMA_128BIT);
|
||||
|
||||
if (slot->curcmd->data->flags & MMC_DATA_READ) {
|
||||
bcm_dma_setup_src(sc->sc_dma_ch, BCM_DMA_DREQ_EMMC,
|
||||
BCM_DMA_SAME_ADDR, BCM_DMA_32BIT);
|
||||
bcm_dma_setup_dst(sc->sc_dma_ch, BCM_DMA_DREQ_NONE,
|
||||
BCM_DMA_INC_ADDR,
|
||||
(len & 0xf) ? BCM_DMA_32BIT : BCM_DMA_128BIT);
|
||||
BCM_DMA_INC_ADDR, width);
|
||||
psrc = sc->sc_sdhci_buffer_phys;
|
||||
pdst = sc->dmamap_seg_addrs[idx];
|
||||
sync_op = BUS_DMASYNC_PREREAD;
|
||||
} else {
|
||||
bcm_dma_setup_src(sc->sc_dma_ch, BCM_DMA_DREQ_NONE,
|
||||
BCM_DMA_INC_ADDR,
|
||||
(len & 0xf) ? BCM_DMA_32BIT : BCM_DMA_128BIT);
|
||||
BCM_DMA_INC_ADDR, width);
|
||||
bcm_dma_setup_dst(sc->sc_dma_ch, BCM_DMA_DREQ_EMMC,
|
||||
BCM_DMA_SAME_ADDR, BCM_DMA_32BIT);
|
||||
psrc = sc->dmamap_seg_addrs[idx];
|
||||
@ -664,8 +723,12 @@ bcm_sdhci_write_dma(device_t dev, struct sdhci_slot *slot)
|
||||
static int
|
||||
bcm_sdhci_will_handle_transfer(device_t dev, struct sdhci_slot *slot)
|
||||
{
|
||||
struct bcm_sdhci_softc *sc = device_get_softc(slot->bus);
|
||||
size_t left;
|
||||
|
||||
if (!sc->conf->use_dma)
|
||||
return (0);
|
||||
|
||||
/*
|
||||
* Do not use DMA for transfers less than block size or with a length
|
||||
* that is not a multiple of four.
|
||||
@ -744,6 +807,9 @@ static driver_t bcm_sdhci_driver = {
|
||||
|
||||
DRIVER_MODULE(sdhci_bcm, simplebus, bcm_sdhci_driver, bcm_sdhci_devclass,
|
||||
NULL, NULL);
|
||||
#ifdef NOTYET
|
||||
MODULE_DEPEND(sdhci_bcm, bcm2835_clkman, 1, 1, 1);
|
||||
#endif
|
||||
SDHCI_DEPEND(sdhci_bcm);
|
||||
#ifndef MMCCAM
|
||||
MMC_DECLARE_BRIDGE(sdhci_bcm);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user