diff options
Diffstat (limited to 'src/cpu/samsung/exynos5250/clock_init.h')
-rw-r--r-- | src/cpu/samsung/exynos5250/clock_init.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5250/clock_init.h b/src/cpu/samsung/exynos5250/clock_init.h new file mode 100644 index 0000000000..57a0fe693d --- /dev/null +++ b/src/cpu/samsung/exynos5250/clock_init.h @@ -0,0 +1,150 @@ +/* + * Clock initialization routines + * + * Copyright (c) 2011 The Chromium OS Authors. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __EXYNOS_CLOCK_INIT_H +#define __EXYNOS_CLOCK_INIT_H + +enum { + MEM_TIMINGS_MSR_COUNT = 4, +}; + +/* These are the ratio's for configuring ARM clock */ +struct arm_clk_ratios { + unsigned arm_freq_mhz; /* Frequency of ARM core in MHz */ + + unsigned apll_mdiv; + unsigned apll_pdiv; + unsigned apll_sdiv; + + unsigned arm2_ratio; + unsigned apll_ratio; + unsigned pclk_dbg_ratio; + unsigned atb_ratio; + unsigned periph_ratio; + unsigned acp_ratio; + unsigned cpud_ratio; + unsigned arm_ratio; +}; + +/* These are the memory timings for a particular memory type and speed */ +struct mem_timings { + enum mem_manuf mem_manuf; /* Memory manufacturer */ + enum ddr_mode mem_type; /* Memory type */ + unsigned frequency_mhz; /* Frequency of memory in MHz */ + + /* Here follow the timing parameters for the selected memory */ + uint8_t apll_mdiv; + uint8_t apll_pdiv; + uint8_t apll_sdiv; + uint8_t mpll_mdiv; + uint8_t mpll_pdiv; + uint8_t mpll_sdiv; + uint8_t cpll_mdiv; + uint8_t cpll_pdiv; + uint8_t cpll_sdiv; + uint8_t gpll_pdiv; + uint16_t gpll_mdiv; + uint8_t gpll_sdiv; + uint8_t epll_mdiv; + uint8_t epll_pdiv; + uint8_t epll_sdiv; + uint8_t vpll_mdiv; + uint8_t vpll_pdiv; + uint8_t vpll_sdiv; + uint8_t bpll_mdiv; + uint8_t bpll_pdiv; + uint8_t bpll_sdiv; + uint8_t use_bpll; /* 1 to use BPLL for cdrex, 0 to use MPLL */ + uint8_t pclk_cdrex_ratio; + unsigned direct_cmd_msr[MEM_TIMINGS_MSR_COUNT]; + + unsigned timing_ref; + unsigned timing_row; + unsigned timing_data; + unsigned timing_power; + + /* DQS, DQ, DEBUG offsets */ + unsigned phy0_dqs; + unsigned phy1_dqs; + unsigned phy0_dq; + unsigned phy1_dq; + uint8_t phy0_tFS; + uint8_t phy1_tFS; + uint8_t phy0_pulld_dqs; + uint8_t phy1_pulld_dqs; + + uint8_t lpddr3_ctrl_phy_reset; + uint8_t ctrl_start_point; + uint8_t ctrl_inc; + uint8_t ctrl_start; + uint8_t ctrl_dll_on; + uint8_t ctrl_ref; + + uint8_t ctrl_force; + uint8_t ctrl_rdlat; + uint8_t ctrl_bstlen; + + uint8_t fp_resync; + uint8_t iv_size; + uint8_t dfi_init_start; + uint8_t aref_en; + + uint8_t rd_fetch; + + uint8_t zq_mode_dds; + uint8_t zq_mode_term; + uint8_t zq_mode_noterm; /* 1 to allow termination disable */ + + unsigned memcontrol; + unsigned memconfig; + + unsigned membaseconfig0; + unsigned membaseconfig1; + unsigned prechconfig_tp_cnt; + unsigned dpwrdn_cyc; + unsigned dsref_cyc; + unsigned concontrol; + /* Channel and Chip Selection */ + uint8_t dmc_channels; /* number of memory channels */ + uint8_t chips_per_channel; /* number of chips per channel */ + uint8_t chips_to_configure; /* number of chips to configure */ + uint8_t send_zq_init; /* 1 to send this command */ + unsigned impedance; /* drive strength impedeance */ + uint8_t gate_leveling_enable; /* check gate leveling is enabled */ +}; + +/** + * Get the correct memory timings for our selected memory type and speed. + * + * This function can be called from SPL or the main U-Boot. + * + * @return pointer to the memory timings that we should use + */ +struct mem_timings *clock_get_mem_timings(void); + +/* + * Initialize clock for the device + */ +void system_clock_init(void); +#endif |