diff options
Diffstat (limited to 'arch/arm/mach-exynos/clock_init.h')
| -rw-r--r-- | arch/arm/mach-exynos/clock_init.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/clock_init.h b/arch/arm/mach-exynos/clock_init.h new file mode 100644 index 0000000..fce502f --- /dev/null +++ b/arch/arm/mach-exynos/clock_init.h @@ -0,0 +1,158 @@ +/* + * Clock initialization routines + * + * Copyright (c) 2011 The Chromium OS Authors. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __EXYNOS_CLOCK_INIT_H +#define __EXYNOS_CLOCK_INIT_H + +enum { +#ifdef CONFIG_EXYNOS5420 + MEM_TIMINGS_MSR_COUNT = 5, +#else + MEM_TIMINGS_MSR_COUNT = 4, +#endif +}; + +/* 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 */ + unsigned apll_mdiv; + unsigned apll_pdiv; + unsigned apll_sdiv; + unsigned mpll_mdiv; + unsigned mpll_pdiv; + unsigned mpll_sdiv; + unsigned cpll_mdiv; + unsigned cpll_pdiv; + unsigned cpll_sdiv; + unsigned gpll_mdiv; + unsigned gpll_pdiv; + unsigned gpll_sdiv; + unsigned epll_mdiv; + unsigned epll_pdiv; + unsigned epll_sdiv; + unsigned vpll_mdiv; + unsigned vpll_pdiv; + unsigned vpll_sdiv; + unsigned bpll_mdiv; + unsigned bpll_pdiv; + unsigned bpll_sdiv; + unsigned kpll_mdiv; + unsigned kpll_pdiv; + unsigned kpll_sdiv; + unsigned dpll_mdiv; + unsigned dpll_pdiv; + unsigned dpll_sdiv; + unsigned ipll_mdiv; + unsigned ipll_pdiv; + unsigned ipll_sdiv; + unsigned spll_mdiv; + unsigned spll_pdiv; + unsigned spll_sdiv; + unsigned rpll_mdiv; + unsigned rpll_pdiv; + unsigned rpll_sdiv; + unsigned 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; + unsigned phy0_tFS; + unsigned phy1_tFS; + unsigned phy0_pulld_dqs; + unsigned phy1_pulld_dqs; + + unsigned lpddr3_ctrl_phy_reset; + unsigned ctrl_start_point; + unsigned ctrl_inc; + unsigned ctrl_start; + unsigned ctrl_dll_on; + unsigned ctrl_ref; + + unsigned ctrl_force; + unsigned ctrl_rdlat; + unsigned ctrl_bstlen; + + unsigned fp_resync; + unsigned iv_size; + unsigned dfi_init_start; + unsigned aref_en; + + unsigned rd_fetch; + + unsigned zq_mode_dds; + unsigned zq_mode_term; + unsigned 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 */ + uint8_t read_leveling_enable; /* check h/w read 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); + +/* + * Set clock divisor value for booting from EMMC. + */ +void emmc_boot_clk_div_set(void); +#endif |