Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4967
-gerrit
commit 993d10e7fce4f210092868724f9a7257fd49fbb0 Author: Aaron Durbin adurbin@chromium.org Date: Tue Nov 12 16:44:18 2013 -0600
baytrail: initialize eMMC device
The eMMC device is initialized as version 4.5 with HS200 speeds.
BUG=chrome-os-partner:23966 BRANCH=None TEST=Built and booted rambi to login screen off of eMMC device.
Change-Id: I686c6136005fcb2587b939ddea293f4398df9868 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/176536 Reviewed-by: Bernie Thompson bhthompson@chromium.org Reviewed-by: Duncan Laurie dlaurie@chromium.org --- src/soc/intel/baytrail/Makefile.inc | 1 + src/soc/intel/baytrail/emmc.c | 75 +++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+)
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc index 0ef8cc4..240f9a1 100644 --- a/src/soc/intel/baytrail/Makefile.inc +++ b/src/soc/intel/baytrail/Makefile.inc @@ -40,6 +40,7 @@ ramstage-y += sata.c ramstage-y += acpi.c ramstage-y += lpe.c ramstage-y += scc.c +ramstage-y += emmc.c
# Remove as ramstage gets fleshed out ramstage-y += placeholders.c diff --git a/src/soc/intel/baytrail/emmc.c b/src/soc/intel/baytrail/emmc.c new file mode 100644 index 0000000..18c16e8 --- /dev/null +++ b/src/soc/intel/baytrail/emmc.c @@ -0,0 +1,75 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <arch/io.h> +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <reg_script.h> + +#include <baytrail/iosf.h> +#include <baytrail/pci_devs.h> +#include <baytrail/ramstage.h> + +static const struct reg_script emmc_ops[] = { + /* Enable 2ms card stable feature. */ + REG_PCI_OR32(0xa8, (1 << 24)), + /* Enable HS200 */ + REG_PCI_WRITE32(0xa0, 0x446cc801), + REG_PCI_WRITE32(0xa4, 0x80000807), + /* cfio_regs_score_special_bits.sdio1_dummy_loopback_en=1 */ + REG_IOSF_OR(IOSF_PORT_SCORE, 0x49c0, (1 << 3)), + /* CLKGATE_EN_1 . cr_scc_mipihsi_clkgate_en = 1 */ + REG_IOSF_RMW(IOSF_PORT_CCU, 0x1c, ~(3 << 26), (1 << 26)), + /* Set slew for HS200 */ + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c0, ~0x3c, 0x3c), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c4, ~0x3c, 0x3c), + /* Max timeout */ + REG_RES_WRITE8(PCI_BASE_ADDRESS_0, 0x002e, 0x0e), + REG_SCRIPT_END, +}; + +static void emmc_init(device_t dev) +{ + struct reg_script ops[] = { + REG_SCRIPT_SET_DEV(dev), + REG_SCRIPT_NEXT(emmc_ops), + REG_SCRIPT_END, + }; + printk(BIOS_DEBUG, "eMMC init\n"); + reg_script_run(ops); +} + +static struct device_operations device_ops = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = emmc_init, + .enable = NULL, + .scan_bus = NULL, + .ops_pci = &soc_pci_ops, +}; + +static const struct pci_driver southcluster __pci_driver = { + .ops = &device_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = MMC_DEVID, +};