static int
at91_mci_attach(device_t dev)
{
struct at91_mci_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *sctx;
struct sysctl_oid *soid;
device_t child;
int err, i;
sctx = device_get_sysctl_ctx(dev);
soid = device_get_sysctl_tree(dev);
sc->dev = dev;
sc->sc_cap = 0;
if (at91_is_rm92())
sc->sc_cap |= CAP_NEEDS_BYTESWAP;
/*
* MCI1 Rev 2 controllers need some workarounds, flag if so.
*/
if (at91_mci_is_mci1rev2xx())
sc->sc_cap |= CAP_MCI1_REV2XX;
err = at91_mci_activate(dev);
if (err)
goto out;
AT91_MCI_LOCK_INIT(sc);
at91_mci_fini(dev);
at91_mci_init(dev);
/*
* Allocate DMA tags and maps and bounce buffers.
*
* The parms in the tag_create call cause the dmamem_alloc call to
* create each bounce buffer as a single contiguous buffer of BBSIZE
* bytes aligned to a 4096 byte boundary.
*
* Do not use DMA_COHERENT for these buffers because that maps the
* memory as non-cachable, which prevents cache line burst fills/writes,
* which is something we need since we're trying to overlap the
* byte-swapping with the DMA operations.
*/
err = bus_dma_tag_create(bus_get_dma_tag(dev), 4096, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
BBSIZE, 1, BBSIZE, 0, NULL, NULL, &sc->dmatag);
if (err != 0)
goto out;
for (i = 0; i < BBCOUNT; ++i) {
err = bus_dmamem_alloc(sc->dmatag, (void **)&sc->bbuf_vaddr[i],
BUS_DMA_NOWAIT, &sc->bbuf_map[i]);
if (err != 0)
goto out;
}
/*
* Activate the interrupt
*/
err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
NULL, at91_mci_intr, sc, &sc->intrhand);
if (err) {
AT91_MCI_LOCK_DESTROY(sc);
goto out;
}
/*
* Allow 4-wire to be initially set via #define.
* Allow a device hint to override that.
* Allow a sysctl to override that.
*/
#if defined(AT91_MCI_HAS_4WIRE) && AT91_MCI_HAS_4WIRE != 0
sc->has_4wire = 1;
#endif
resource_int_value(device_get_name(dev), device_get_unit(dev),
"4wire", &sc->has_4wire);
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "4wire",
CTLFLAG_RW, &sc->has_4wire, 0, "has 4 wire SD Card bus");
if (sc->has_4wire)
sc->sc_cap |= CAP_HAS_4WIRE;
sc->allow_overclock = AT91_MCI_ALLOW_OVERCLOCK;
resource_int_value(device_get_name(dev), device_get_unit(dev),
"allow_overclock", &sc->allow_overclock);
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "allow_overclock",
CTLFLAG_RW, &sc->allow_overclock, 0,
"Allow up to 30MHz clock for 25MHz request when next highest speed 15MHz or less.");
/*
* Our real min freq is master_clock/512, but upper driver layers are
* going to set the min speed during card discovery, and the right speed
* for that is 400kHz, so advertise a safe value just under that.
*
* For max speed, while the rm9200 manual says the max is 50mhz, it also
* says it supports only the SD v1.0 spec, which means the real limit is
* 25mhz. On the other hand, historical use has been to slightly violate
* the standard by running the bus at 30MHz. For more information on
* that, see the comments at the top of this file.
*/
sc->host.f_min = 375000;
sc->host.f_max = at91_master_clock / 2;
if (sc->host.f_max > 25000000)
sc->host.f_max = 25000000;
sc->host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340;
sc->host.caps = 0;
if (sc->sc_cap & CAP_HAS_4WIRE)
sc->host.caps |= MMC_CAP_4_BIT_DATA;
child = device_add_child(dev, "mmc", 0);
device_set_ivars(dev, &sc->host);
err = bus_generic_attach(dev);
out:
if (err)
at91_mci_deactivate(dev);
return (err);
}
void rt_init_thread_entry(void* parameter)
{
/* Filesystem Initialization */
#ifdef RT_USING_DFS
{
/* init the device filesystem */
dfs_init();
#if defined(RT_USING_DFS_ELMFAT)
/* init the elm chan FatFs filesystam*/
elm_init();
#endif
#if defined(RT_USING_DFS_ROMFS)
dfs_romfs_init();
if (dfs_mount(RT_NULL, "/rom", "rom", 0, &romfs_root) == 0)
{
rt_kprintf("ROM File System initialized!\n");
}
else
rt_kprintf("ROM File System initialzation failed!\n");
#endif
#if defined(RT_USING_DFS_DEVFS)
devfs_init();
if (dfs_mount(RT_NULL, "/dev", "devfs", 0, 0) == 0)
rt_kprintf("Device File System initialized!\n");
else
rt_kprintf("Device File System initialzation failed!\n");
#ifdef RT_USING_NEWLIB
/* init libc */
libc_system_init("uart0");
#endif
#endif
#if defined(RT_USING_DFS_UFFS)
{
/* init the uffs filesystem */
dfs_uffs_init();
/* mount flash device as flash directory */
if(dfs_mount("nand0", "/nand0", "uffs", 0, 0) == 0)
rt_kprintf("UFFS File System initialized!\n");
else
rt_kprintf("UFFS File System initialzation failed!\n");
}
#endif
#ifdef RT_USING_SDIO
rt_mmcsd_core_init();
rt_mmcsd_blk_init();
at91_mci_init();
rt_thread_delay(RT_TICK_PER_SECOND*2);
/* mount sd card fat partition 1 as root directory */
if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
{
rt_kprintf("File System initialized!\n");
}
else
rt_kprintf("File System initialzation failed!\n");
#endif
}
#endif
#ifdef RT_USING_LWIP
{
/* register ethernetif device */
eth_system_device_init();
rt_hw_macb_init();
/* init lwip system */
lwip_sys_init();
}
#endif
#ifdef RT_USING_I2C
{
rt_i2c_core_init();
at91_i2c_init();
}
#endif
}
