Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4966
-gerrit
commit b76f17ad99f0d0510d79a1bc5a2c2a73edd6d787 Author: Aaron Durbin adurbin@chromium.org Date: Tue Nov 12 16:40:33 2013 -0600
baytrail: initialize common SSC functionality
The SSC (storage control cluster) houses the SD, SDIO, and eMMC interfaces. The scc cofniguration function, baytrail_init_scc(), is ran in the pre device stage to initialize the SCC. The eMMC is expected to be configured for version 4.5.
BUG=chrome-os-partner:23966 BRANCH=None TEST=Built and booted with some other eMMC changes into login screen off of eMMC device.
Change-Id: I81cc755a790b7e43ad234a8201dae480277202c8 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/176535 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/baytrail/ramstage.h | 1 + src/soc/intel/baytrail/ramstage.c | 2 + src/soc/intel/baytrail/scc.c | 83 ++++++++++++++++++++++++++++++ 4 files changed, 87 insertions(+)
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc index 81b2c24..c7e3843 100644 --- a/src/soc/intel/baytrail/Makefile.inc +++ b/src/soc/intel/baytrail/Makefile.inc @@ -39,6 +39,7 @@ ramstage-$(CONFIG_HAVE_REFCODE_BLOB) += refcode.c ramstage-y += sata.c ramstage-y += acpi.c ramstage-y += lpe.c +ramstage-y += scc.c
# Remove as ramstage gets fleshed out ramstage-y += placeholders.c diff --git a/src/soc/intel/baytrail/baytrail/ramstage.h b/src/soc/intel/baytrail/baytrail/ramstage.h index 4fa6ddd..217c67b 100644 --- a/src/soc/intel/baytrail/baytrail/ramstage.h +++ b/src/soc/intel/baytrail/baytrail/ramstage.h @@ -33,6 +33,7 @@ void baytrail_run_reference_code(void); #else static inline void baytrail_run_reference_code(void) {} #endif +void baytrail_init_scc(void);
extern struct pci_operations soc_pci_ops;
diff --git a/src/soc/intel/baytrail/ramstage.c b/src/soc/intel/baytrail/ramstage.c index 0c2bed8..b0b48b0 100644 --- a/src/soc/intel/baytrail/ramstage.c +++ b/src/soc/intel/baytrail/ramstage.c @@ -166,6 +166,8 @@ void baytrail_init_pre_device(void) config = mainboard_get_gpios(); setup_soc_gpios(config);
+ baytrail_init_scc(); + /* Indicate S3 resume to rest of ramstage. */ s3_resume_prepare(); } diff --git a/src/soc/intel/baytrail/scc.c b/src/soc/intel/baytrail/scc.c new file mode 100644 index 0000000..af941fa --- /dev/null +++ b/src/soc/intel/baytrail/scc.c @@ -0,0 +1,83 @@ +/* + * 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 <console/console.h> +#include <reg_script.h> + +#include <baytrail/iosf.h> +#include <baytrail/ramstage.h> + +static const struct reg_script scc_start_dll[] = { + /* Configure master DLL. */ + REG_IOSF_WRITE(IOSF_PORT_SCORE, 0x4964, 0x00078000), + /* Configure Swing,FSM for Master DLL */ + REG_IOSF_WRITE(IOSF_PORT_SCORE, 0x4970, 0x00000133), + /* Run+Local Reset on Master DLL */ + REG_IOSF_WRITE(IOSF_PORT_SCORE, 0x4970, 0x00001933), + REG_SCRIPT_END, +}; + +static const struct reg_script scc_after_dll[] = { + /* Configure Write Path */ + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x4954, ~0x7fff, 0x35ad), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x4958, ~0x7fff, 0x35ad), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x495c, ~0x7fff, 0x35ad), + /* Configure Read Path */ + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x43e4, ~0x7fff, 0x35ad), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x4324, ~0x7fff, 0x35ad), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x42b4, ~0x7fff, 0x35ad), + /* eMMC 4.5 TX and RX DLL */ + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49a4, ~0x1f001f, 0xa000d), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49a8, ~0x1f001f, 0xd000d), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49ac, ~0x1f001f, 0xd000d), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49b0, ~0x1f001f, 0xd000d), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49b4, ~0x1f001f, 0xd000d), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49b8, ~0x1, 0x0), + /* cfio_regs_mmc1_ELECTRICAL.nslew/pslew */ + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c0, ~0x3c, 0x0), + REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c4, ~0x3c, 0x0), + /* + * iosf2ocp_private.GENREGRW1.cr_clock_enable_clk_ocp = 01 + * iosf2ocp_private.GENREGRW1.cr_clock_enable_clk_xin = 01 + */ + REG_IOSF_RMW(IOSF_PORT_SCC, 0x600, ~0xf, 0x5), + /* Enable IOSF Snoop */ + REG_IOSF_OR(IOSF_PORT_SCC, 0x00, (1 << 7)), + /* SDIO 3V Support. */ + REG_IOSF_RMW(IOSF_PORT_SCC, 0x600, ~0x30, 0x30), + REG_SCRIPT_END, +}; + +void baytrail_init_scc(void) +{ + uint32_t dll_values; + + printk(BIOS_DEBUG, "Initializing sideband SCC registers.\n"); + + /* Common Sideband Initialization for SCC */ + reg_script_run(scc_start_dll); + + /* Override Slave Path - populate DLL settings. */ + dll_values = iosf_score_read(0x496c) & 0x7ffff; + dll_values |= iosf_score_read(0x4950) & ~0xfffff; + iosf_score_write(0x4950, dll_values | (1 << 19)); + + reg_script_run(scc_after_dll); +}