| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. |
| * Copyright 2014 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. |
| */ |
| #include <arch/clock.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <delay.h> |
| #include <soc/addressmap.h> |
| #include <soc/clk_rst.h> |
| #include <soc/clock.h> |
| #include <soc/flow.h> |
| #include <soc/maincpu.h> |
| #include <soc/pmc.h> |
| #include <soc/sysctr.h> |
| #include <stdlib.h> |
| #include <symbols.h> |
| |
| static struct clk_rst_ctlr *clk_rst = (void *)TEGRA_CLK_RST_BASE; |
| static struct flow_ctlr *flow = (void *)TEGRA_FLOW_BASE; |
| static struct tegra_pmc_regs *pmc = (void *)TEGRA_PMC_BASE; |
| static struct sysctr_regs *sysctr = (void *)TEGRA_SYSCTR0_BASE; |
| |
| struct pll_dividers { |
| u32 n : 10; |
| u32 m : 8; |
| u32 p : 4; |
| u32 cpcon : 4; |
| u32 lfcon : 4; |
| u32 : 2; |
| }; |
| |
| /* Some PLLs have more restrictive divider bit lengths or are missing some |
| * fields. Make sure to use the right struct in the osc_table definition to get |
| * compile-time checking, but keep the bits aligned with struct pll_dividers so |
| * they can be used interchangeably at run time. Add new formats as required. */ |
| struct pllcx_dividers { |
| u32 n : 8; |
| u32 : 2; |
| u32 m : 8; |
| u32 p : 4; |
| u32 : 10; |
| }; |
| struct pllpad_dividers { |
| u32 n : 10; |
| u32 m : 5; |
| u32 : 3; |
| u32 p : 3; |
| u32 : 1; |
| u32 cpcon : 4; |
| u32 : 6; |
| }; |
| struct pllu_dividers { |
| u32 n : 10; |
| u32 m : 5; |
| u32 : 3; |
| u32 p : 1; |
| u32 : 3; |
| u32 cpcon : 4; |
| u32 lfcon : 4; |
| u32 : 2; |
| }; |
| |
| union __attribute__((transparent_union)) pll_fields { |
| u32 raw; |
| struct pll_dividers div; |
| struct pllcx_dividers cx; |
| struct pllpad_dividers pad; |
| struct pllu_dividers u; |
| }; |
| |
| /* This table defines the frequency dividers for every PLL to turn the external |
| * OSC clock into the frequencies defined by TEGRA_PLL*_KHZ in soc/clock.h. |
| * All PLLs have three dividers (n, m and p), with the governing formula for |
| * the output frequency being CF = (IN / m), VCO = CF * n and OUT = VCO / (2^p). |
| * All divisor configurations must meet the PLL's constraints for VCO and CF: |
| * PLLX: 12 MHz < CF < 50 MHz, 700 MHz < VCO < 3000 MHz |
| * PLLC: 12 MHz < CF < 50 MHz, 600 MHz < VCO < 1400 MHz |
| * PLLM: 12 MHz < CF < 50 MHz, 400 MHz < VCO < 1066 MHz |
| * PLLP: 1 MHz < CF < 6 MHz, 200 MHz < VCO < 700 MHz |
| * PLLD: 1 MHz < CF < 6 MHz, 500 MHz < VCO < 1000 MHz |
| * PLLU: 1 MHz < CF < 6 MHz, 480 MHz < VCO < 960 MHz |
| * PLLDP: 12 MHz < CF < 38 MHz, 600 MHz < VCO < 1200 MHz |
| * (values taken from Linux' drivers/clk/tegra/clk-tegra124.c). */ |
| struct { |
| int khz; |
| struct pllcx_dividers pllx; /* target: CONFIG_PLLX_KHZ */ |
| struct pllcx_dividers pllc; /* target: 600 MHz */ |
| /* PLLM is set up dynamically by clock_sdram(). */ |
| /* PLLP is hardwired to 408 MHz in HW (unless we set BASE_OVRD). */ |
| struct pllu_dividers pllu; /* target; 960 MHz */ |
| struct pllcx_dividers plldp; /* target; 270 MHz */ |
| /* PLLDP treats p differently (OUT = VCO / (p + 1) for p < 6). */ |
| } static const osc_table[16] = { |
| [OSC_FREQ_12]{ |
| .khz = 12000, |
| .pllx = {.n = TEGRA_PLLX_KHZ / 12000, .m = 1, .p = 0}, |
| .pllc = {.n = 50, .m = 1, .p = 0}, |
| .pllu = {.n = 960, .m = 12, .p = 0, .cpcon = 12, .lfcon = 2}, |
| .plldp = {.n = 90, .m = 1, .p = 3}, |
| }, |
| [OSC_FREQ_13]{ |
| .khz = 13000, |
| .pllx = {.n = TEGRA_PLLX_KHZ / 13000, .m = 1, .p = 0}, |
| .pllc = {.n = 46, .m = 1, .p = 0}, /* 598.0 MHz */ |
| .pllu = {.n = 960, .m = 13, .p = 0, .cpcon = 12, .lfcon = 2}, |
| .plldp = {.n = 83, .m = 1, .p = 3}, /* 269.8 MHz */ |
| }, |
| [OSC_FREQ_16P8]{ |
| .khz = 16800, |
| .pllx = {.n = TEGRA_PLLX_KHZ / 16800, .m = 1, .p = 0}, |
| .pllc = {.n = 71, .m = 1, .p = 1}, /* 596.4 MHz */ |
| .pllu = {.n = 400, .m = 7, .p = 0, .cpcon = 5, .lfcon = 2}, |
| .plldp = {.n = 64, .m = 1, .p = 3}, /* 268.8 MHz */ |
| }, |
| [OSC_FREQ_19P2]{ |
| .khz = 19200, |
| .pllx = {.n = TEGRA_PLLX_KHZ / 19200, .m = 1, .p = 0}, |
| .pllc = {.n = 62, .m = 1, .p = 1}, /* 595.2 MHz */ |
| .pllu = {.n = 200, .m = 4, .p = 0, .cpcon = 3, .lfcon = 2}, |
| .plldp = {.n = 56, .m = 1, .p = 3}, /* 268.8 MHz */ |
| }, |
| [OSC_FREQ_26]{ |
| .khz = 26000, |
| .pllx = {.n = TEGRA_PLLX_KHZ / 26000, .m = 1, .p = 0}, |
| .pllc = {.n = 23, .m = 1, .p = 0}, /* 598.0 MHz */ |
| .pllu = {.n = 960, .m = 26, .p = 0, .cpcon = 12, .lfcon = 2}, |
| .plldp = {.n = 83, .m = 2, .p = 3}, /* 269.8 MHz */ |
| }, |
| /* These oscillators get predivided as PLL inputs... n/m/p divisors for |
| * 38.4 should always match 19.2, and 48 should always match 12. */ |
| [OSC_FREQ_38P4]{ |
| .khz = 38400, |
| .pllx = {.n = TEGRA_PLLX_KHZ / 19200, .m = 1, .p = 0}, |
| .pllc = {.n = 62, .m = 1, .p = 1}, /* 595.2 MHz */ |
| .pllu = {.n = 200, .m = 4, .p = 0, .cpcon = 3, .lfcon = 2}, |
| .plldp = {.n = 56, .m = 1, .p = 3}, /* 268.8 MHz */ |
| }, |
| [OSC_FREQ_48]{ |
| .khz = 48000, |
| .pllx = {.n = TEGRA_PLLX_KHZ / 12000, .m = 1, .p = 0}, |
| .pllc = {.n = 50, .m = 1, .p = 0}, |
| .pllu = {.n = 960, .m = 12, .p = 0, .cpcon = 12, .lfcon = 2}, |
| .plldp = {.n = 90, .m = 1, .p = 3}, |
| }, |
| }; |
| |
| /* Get the oscillator frequency, from the corresponding hardware |
| * configuration field. This is actually a per-soc thing. Avoid the |
| * temptation to make it common. |
| */ |
| static u32 clock_get_osc_bits(void) |
| { |
| return (read32(&clk_rst->osc_ctrl) & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT; |
| } |
| |
| int clock_get_osc_khz(void) |
| { |
| return osc_table[clock_get_osc_bits()].khz; |
| } |
| |
| int clock_get_pll_input_khz(void) |
| { |
| u32 osc_ctrl = read32(&clk_rst->osc_ctrl); |
| u32 osc_bits = (osc_ctrl & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT; |
| u32 pll_ref_div = (osc_ctrl & OSC_PREDIV_MASK) >> OSC_PREDIV_SHIFT; |
| return osc_table[osc_bits].khz >> pll_ref_div; |
| } |
| |
| void clock_init_arm_generic_timer(void) |
| { |
| uint32_t freq = clock_get_osc_khz() * 1000; |
| // Set the cntfrq register. |
| set_cntfrq(freq); |
| |
| // Record the system timer frequency. |
| write32(&sysctr->cntfid0, freq); |
| // Enable the system counter. |
| uint32_t cntcr = read32(&sysctr->cntcr); |
| cntcr |= SYSCTR_CNTCR_EN | SYSCTR_CNTCR_HDBG; |
| write32(&sysctr->cntcr, cntcr); |
| } |
| |
| #define SOR0_CLK_SEL0 (1 << 14) |
| #define SOR0_CLK_SEL1 (1 << 15) |
| |
| void sor_clock_stop(void) |
| { |
| /* The Serial Output Resource clock has to be off |
| * before we start the plldp. Learned the hard way. |
| * FIXME: this has to be cleaned up a bit more. |
| * Waiting on some new info from Nvidia. |
| */ |
| clrbits_le32(&clk_rst->clk_src_sor, SOR0_CLK_SEL0 | SOR0_CLK_SEL1); |
| } |
| |
| void sor_clock_start(void) |
| { |
| /* uses PLLP, has a non-standard bit layout. */ |
| setbits_le32(&clk_rst->clk_src_sor, SOR0_CLK_SEL0); |
| } |
| |
| static void init_pll(u32 *base, u32 *misc, const union pll_fields pll, u32 lock) |
| { |
| u32 dividers = pll.div.n << PLL_BASE_DIVN_SHIFT | |
| pll.div.m << PLL_BASE_DIVM_SHIFT | |
| pll.div.p << PLL_BASE_DIVP_SHIFT; |
| u32 misc_con = pll.div.cpcon << PLL_MISC_CPCON_SHIFT | |
| pll.div.lfcon << PLL_MISC_LFCON_SHIFT; |
| |
| /* Write dividers but BYPASS the PLL while we're messing with it. */ |
| write32(base, dividers | PLL_BASE_BYPASS); |
| /* |
| * Set Lock bit, CPCON and LFCON fields (default to 0 if it doesn't |
| * exist for this PLL) |
| */ |
| write32(misc, lock | misc_con); |
| |
| /* Enable PLL and take it back out of BYPASS */ |
| write32(base, dividers | PLL_BASE_ENABLE); |
| |
| /* Wait for lock ready */ |
| while (!(read32(base) & PLL_BASE_LOCK)); |
| } |
| |
| static void init_utmip_pll(void) |
| { |
| int khz = clock_get_pll_input_khz(); |
| |
| /* Shut off PLL crystal clock while we mess with it */ |
| clrbits_le32(&clk_rst->utmip_pll_cfg2, 1 << 30); /* PHY_XTAL_CLKEN */ |
| udelay(1); |
| |
| write32(&clk_rst->utmip_pll_cfg0, /* 960MHz * 1 / 80 == 12 MHz */ |
| 80 << 16 | /* (rst) phy_divn */ |
| 1 << 8); /* (rst) phy_divm */ |
| |
| write32(&clk_rst->utmip_pll_cfg1, |
| CEIL_DIV(khz, 8000) << 27 | /* pllu_enbl_cnt / 8 (1us) */ |
| 0 << 16 | /* PLLU pwrdn */ |
| 0 << 14 | /* pll_enable pwrdn */ |
| 0 << 12 | /* pll_active pwrdn */ |
| CEIL_DIV(khz, 102) << 0); /* phy_stbl_cnt / 256 (2.5ms) */ |
| |
| /* TODO: TRM can't decide if actv is 5us or 10us, keep an eye on it */ |
| write32(&clk_rst->utmip_pll_cfg2, |
| 0 << 24 | /* SAMP_D/XDEV pwrdn */ |
| CEIL_DIV(khz, 3200) << 18 | /* phy_actv_cnt / 16 (5us) */ |
| CEIL_DIV(khz, 256) << 6 | /* pllu_stbl_cnt / 256 (1ms) */ |
| 0 << 4 | /* SAMP_C/USB3 pwrdn */ |
| 0 << 2 | /* SAMP_B/XHOST pwrdn */ |
| 0 << 0); /* SAMP_A/USBD pwrdn */ |
| |
| setbits_le32(&clk_rst->utmip_pll_cfg2, 1 << 30); /* PHY_XTAL_CLKEN */ |
| } |
| |
| /* Graphics just has to be different. There's a few more bits we |
| * need to set in here, but it makes sense just to restrict all the |
| * special bits to this one function. |
| */ |
| static void graphics_pll(void) |
| { |
| int osc = clock_get_osc_bits(); |
| u32 *cfg = &clk_rst->plldp_ss_cfg; |
| /* the vendor code sets the dither bit (28) |
| * an undocumented bit (24) |
| * and clamp while we mess with it (22) |
| * Dither is pretty important to display port |
| * so we really do need to handle these bits. |
| * I'm not willing to not clamp it, even if |
| * it might "mostly work" with it not set, |
| * I don't want to find out in a few months |
| * that it is needed. |
| */ |
| u32 scfg = (1<<28) | (1<<24) | (1<<22); |
| write32(cfg, scfg); |
| init_pll(&clk_rst->plldp_base, &clk_rst->plldp_misc, |
| osc_table[osc].plldp, PLLDPD2_MISC_LOCK_ENABLE); |
| /* leave dither and undoc bits set, release clamp */ |
| scfg = (1<<28) | (1<<24); |
| write32(cfg, scfg); |
| |
| /* disp1 will be set when panel information (pixel clock) is |
| * retrieved (clock_display). |
| */ |
| } |
| |
| /* |
| * Init PLLD clock source. |
| * |
| * @frequency: the requested plld frequency |
| * |
| * Return the plld frequency if success, otherwise return 0. |
| */ |
| u32 |
| clock_display(u32 frequency) |
| { |
| /** |
| * plld (fo) = vco >> p, where 500MHz < vco < 1000MHz |
| * = (cf * n) >> p, where 1MHz < cf < 6MHz |
| * = ((ref / m) * n) >> p |
| * |
| * Iterate the possible values of p (3 bits, 2^7) to find out a minimum |
| * safe vco, then find best (m, n). since m has only 5 bits, we can |
| * iterate all possible values. Note Tegra 124 supports 11 bits for n, |
| * but our pll_fields has only 10 bits for n. |
| * |
| * Note values undershoot or overshoot target output frequency may not |
| * work if the values are not in "safe" range by panel specification. |
| */ |
| struct pllpad_dividers plld = { 0 }; |
| u32 ref = clock_get_pll_input_khz() * 1000, m, n, p = 0; |
| u32 cf, vco, rounded_rate = frequency; |
| u32 diff, best_diff; |
| const u32 max_m = 1 << 5, max_n = 1 << 10, max_p = 1 << 3, |
| mhz = 1000 * 1000, min_vco = 500 * mhz, max_vco = 1000 * mhz, |
| min_cf = 1 * mhz, max_cf = 6 * mhz; |
| |
| for (vco = frequency; vco < min_vco && p < max_p; p++) |
| vco <<= 1; |
| |
| if (vco < min_vco || vco > max_vco) { |
| printk(BIOS_ERR, "%s: Cannot find out a supported VCO" |
| " for Frequency (%u).\n", __func__, frequency); |
| return 0; |
| } |
| |
| plld.p = p; |
| best_diff = vco; |
| |
| for (m = 1; m < max_m && best_diff; m++) { |
| cf = ref / m; |
| if (cf < min_cf) |
| break; |
| if (cf > max_cf) |
| continue; |
| |
| n = vco / cf; |
| if (n >= max_n) |
| continue; |
| |
| diff = vco - n * cf; |
| if (n + 1 < max_n && diff > cf / 2) { |
| n++; |
| diff = cf - diff; |
| } |
| |
| if (diff >= best_diff) |
| continue; |
| |
| best_diff = diff; |
| plld.m = m; |
| plld.n = n; |
| } |
| |
| if (plld.n < 50) |
| plld.cpcon = 2; |
| else if (plld.n < 300) |
| plld.cpcon = 3; |
| else if (plld.n < 600) |
| plld.cpcon = 8; |
| else |
| plld.cpcon = 12; |
| |
| if (best_diff) { |
| printk(BIOS_WARNING, "%s: Failed to match output frequency %u, " |
| "best difference is %u.\n", __func__, frequency, |
| best_diff); |
| rounded_rate = (ref / plld.m * plld.n) >> plld.p; |
| } |
| |
| printk(BIOS_DEBUG, "%s: PLLD=%u ref=%u, m/n/p/cpcon=%u/%u/%u/%u\n", |
| __func__, rounded_rate, ref, plld.m, plld.n, plld.p, plld.cpcon); |
| |
| init_pll(&clk_rst->plld_base, &clk_rst->plld_misc, plld, |
| (PLLUD_MISC_LOCK_ENABLE | PLLD_MISC_CLK_ENABLE)); |
| |
| return rounded_rate; |
| } |
| |
| /* Initialize the UART and put it on CLK_M so we can use it during clock_init(). |
| * Will later move it to PLLP in clock_config(). The divisor must be very small |
| * to accommodate 12KHz OSCs, so we override the 16.0 UART divider with the 15.1 |
| * CLK_SOURCE divider to get more precision. (This might still not be enough for |
| * some OSCs... if you use 13KHz, be prepared to have a bad time.) The 1900 has |
| * been determined through trial and error (must lead to div 13 at 24MHz). */ |
| void clock_early_uart(void) |
| { |
| write32(&clk_rst->clk_src_uarta, CLK_M << CLK_SOURCE_SHIFT | |
| CLK_UART_DIV_OVERRIDE | CLK_DIVIDER(TEGRA_CLK_M_KHZ, 1900)); |
| setbits_le32(&clk_rst->clk_out_enb_l, CLK_L_UARTA); |
| udelay(2); |
| clrbits_le32(&clk_rst->rst_dev_l, CLK_L_UARTA); |
| } |
| |
| /* Enable output clock (CLK1~3) for external peripherals. */ |
| void clock_external_output(int clk_id) |
| { |
| switch (clk_id) { |
| case 1: |
| setbits_le32(&pmc->clk_out_cntrl, 1 << 2); |
| break; |
| case 2: |
| setbits_le32(&pmc->clk_out_cntrl, 1 << 10); |
| break; |
| case 3: |
| setbits_le32(&pmc->clk_out_cntrl, 1 << 18); |
| break; |
| default: |
| printk(BIOS_CRIT, "ERROR: Unknown output clock id %d\n", |
| clk_id); |
| break; |
| } |
| } |
| |
| /* Start PLLM for SDRAM. */ |
| void clock_sdram(u32 m, u32 n, u32 p, u32 setup, u32 ph45, u32 ph90, |
| u32 ph135, u32 kvco, u32 kcp, u32 stable_time, u32 emc_source, |
| u32 same_freq) |
| { |
| u32 misc1 = ((setup << PLLM_MISC1_SETUP_SHIFT) | |
| (ph45 << PLLM_MISC1_PD_LSHIFT_PH45_SHIFT) | |
| (ph90 << PLLM_MISC1_PD_LSHIFT_PH90_SHIFT) | |
| (ph135 << PLLM_MISC1_PD_LSHIFT_PH135_SHIFT)), |
| misc2 = ((kvco << PLLM_MISC2_KVCO_SHIFT) | |
| (kcp << PLLM_MISC2_KCP_SHIFT)), |
| base; |
| |
| if (same_freq) |
| emc_source |= CLK_SOURCE_EMC_MC_EMC_SAME_FREQ; |
| else |
| emc_source &= ~CLK_SOURCE_EMC_MC_EMC_SAME_FREQ; |
| |
| /* |
| * Note PLLM_BASE.PLLM_OUT1_RSTN must be in RESET_ENABLE mode, and |
| * PLLM_BASE.ENABLE must be in DISABLE state (both are the default |
| * values after coldboot reset). |
| */ |
| |
| write32(&clk_rst->pllm_misc1, misc1); |
| write32(&clk_rst->pllm_misc2, misc2); |
| |
| /* PLLM.BASE needs BYPASS=0, different from general init_pll */ |
| base = read32(&clk_rst->pllm_base); |
| base &= ~(PLLCMX_BASE_DIVN_MASK | PLLCMX_BASE_DIVM_MASK | |
| PLLM_BASE_DIVP_MASK | PLL_BASE_BYPASS); |
| base |= ((m << PLL_BASE_DIVM_SHIFT) | (n << PLL_BASE_DIVN_SHIFT) | |
| (p << PLL_BASE_DIVP_SHIFT)); |
| write32(&clk_rst->pllm_base, base); |
| |
| setbits_le32(&clk_rst->pllm_base, PLL_BASE_ENABLE); |
| /* stable_time is required, before we can start to check lock. */ |
| udelay(stable_time); |
| |
| while (!(read32(&clk_rst->pllm_base) & PLL_BASE_LOCK)) { |
| udelay(1); |
| } |
| /* |
| * After PLLM reports being locked, we have to delay 10us before |
| * enabling PLLM_OUT. |
| */ |
| udelay(10); |
| |
| /* Put OUT1 out of reset state (start to output). */ |
| setbits_le32(&clk_rst->pllm_out, PLLM_OUT1_RSTN_RESET_DISABLE); |
| |
| /* Enable and start MEM(MC) and EMC. */ |
| clock_enable_clear_reset(0, CLK_H_MEM | CLK_H_EMC, 0, 0, 0, 0); |
| write32(&clk_rst->clk_src_emc, emc_source); |
| udelay(IO_STABILIZATION_DELAY); |
| } |
| |
| void clock_cpu0_config(void *entry) |
| { |
| void * const evp_cpu_reset = (uint8_t *)TEGRA_EVP_BASE + 0x100; |
| |
| write32(&maincpu_stack_pointer, (uintptr_t)_estack); |
| write32(&maincpu_entry_point, (uintptr_t)entry); |
| write32(evp_cpu_reset, (uintptr_t)&maincpu_setup); |
| |
| /* Set active CPU cluster to G */ |
| clrbits_le32(&flow->cluster_control, 1); |
| |
| // Set up cclk_brst and divider. |
| write32(&clk_rst->cclk_brst_pol, |
| (CRC_CCLK_BRST_POL_PLLX_OUT0 << 0) | |
| (CRC_CCLK_BRST_POL_PLLX_OUT0 << 4) | |
| (CRC_CCLK_BRST_POL_PLLX_OUT0 << 8) | |
| (CRC_CCLK_BRST_POL_PLLX_OUT0 << 12) | |
| (CRC_CCLK_BRST_POL_CPU_STATE_RUN << 28)); |
| write32(&clk_rst->super_cclk_div, |
| CRC_SUPER_CCLK_DIVIDER_SUPER_CDIV_ENB); |
| |
| // Enable the clocks for CPUs 0-3. |
| uint32_t cpu_cmplx_clr = read32(&clk_rst->clk_cpu_cmplx_clr); |
| cpu_cmplx_clr |= CRC_CLK_CLR_CPU0_STP | CRC_CLK_CLR_CPU1_STP | |
| CRC_CLK_CLR_CPU2_STP | CRC_CLK_CLR_CPU3_STP; |
| write32(&clk_rst->clk_cpu_cmplx_clr, cpu_cmplx_clr); |
| |
| // Enable other CPU related clocks. |
| setbits_le32(&clk_rst->clk_out_enb_l, CLK_L_CPU); |
| setbits_le32(&clk_rst->clk_out_enb_v, CLK_V_CPUG); |
| setbits_le32(&clk_rst->clk_out_enb_v, CLK_V_CPULP); |
| } |
| |
| void clock_cpu0_remove_reset(void) |
| { |
| // Disable the reset on the non-CPU parts of the fast cluster. |
| write32(&clk_rst->rst_cpug_cmplx_clr, CRC_RST_CPUG_CLR_NONCPU); |
| // Disable the various resets on the CPUs. |
| write32(&clk_rst->rst_cpug_cmplx_clr, |
| CRC_RST_CPUG_CLR_CPU0 | CRC_RST_CPUG_CLR_CPU1 | |
| CRC_RST_CPUG_CLR_CPU2 | CRC_RST_CPUG_CLR_CPU3 | |
| CRC_RST_CPUG_CLR_DBG0 | CRC_RST_CPUG_CLR_DBG1 | |
| CRC_RST_CPUG_CLR_DBG2 | CRC_RST_CPUG_CLR_DBG3 | |
| CRC_RST_CPUG_CLR_CORE0 | CRC_RST_CPUG_CLR_CORE1 | |
| CRC_RST_CPUG_CLR_CORE2 | CRC_RST_CPUG_CLR_CORE3 | |
| CRC_RST_CPUG_CLR_CX0 | CRC_RST_CPUG_CLR_CX1 | |
| CRC_RST_CPUG_CLR_CX2 | CRC_RST_CPUG_CLR_CX3 | |
| CRC_RST_CPUG_CLR_L2 | CRC_RST_CPUG_CLR_PDBG); |
| |
| // Disable the reset on the non-CPU parts of the slow cluster. |
| write32(&clk_rst->rst_cpulp_cmplx_clr, CRC_RST_CPULP_CLR_NONCPU); |
| // Disable the various resets on the LP CPU. |
| write32(&clk_rst->rst_cpulp_cmplx_clr, |
| CRC_RST_CPULP_CLR_CPU0 | CRC_RST_CPULP_CLR_DBG0 | |
| CRC_RST_CPULP_CLR_CORE0 | CRC_RST_CPULP_CLR_CX0 | |
| CRC_RST_CPULP_CLR_L2 | CRC_RST_CPULP_CLR_PDBG); |
| } |
| |
| void clock_halt_avp(void) |
| { |
| for (;;) { |
| write32(&flow->halt_cop_events, |
| FLOW_EVENT_JTAG | FLOW_EVENT_LIC_IRQ | |
| FLOW_EVENT_GIC_IRQ | FLOW_MODE_WAITEVENT); |
| } |
| } |
| |
| void clock_init(void) |
| { |
| u32 osc = clock_get_osc_bits(); |
| |
| /* Set PLLC dynramp_step A to 0x2b and B to 0xb (from U-Boot -- why? */ |
| write32(&clk_rst->pllc_misc2, 0x2b << 17 | 0xb << 9); |
| |
| /* Max out the AVP clock before everything else (need PLLC for that). */ |
| init_pll(&clk_rst->pllc_base, &clk_rst->pllc_misc, |
| osc_table[osc].pllc, PLLC_MISC_LOCK_ENABLE); |
| |
| /* Typical ratios are 1:2:2 or 1:2:3 sclk:hclk:pclk (See: APB DMA |
| * features section in the TRM). */ |
| write32(&clk_rst->clk_sys_rate, |
| TEGRA_HCLK_RATIO << HCLK_DIVISOR_SHIFT | |
| TEGRA_PCLK_RATIO << PCLK_DIVISOR_SHIFT); |
| write32(&clk_rst->pllc_out, CLK_DIVIDER(TEGRA_PLLC_KHZ, TEGRA_SCLK_KHZ) |
| << PLL_OUT_RATIO_SHIFT | PLL_OUT_CLKEN | PLL_OUT_RSTN); |
| write32(&clk_rst->sclk_brst_pol, /* sclk = 300 MHz */ |
| SCLK_SYS_STATE_RUN << SCLK_SYS_STATE_SHIFT | |
| SCLK_SOURCE_PLLC_OUT1 << SCLK_RUN_SHIFT); |
| |
| /* Change the oscillator drive strength (from U-Boot -- why?) */ |
| clrsetbits_le32(&clk_rst->osc_ctrl, OSC_XOFS_MASK, |
| OSC_DRIVE_STRENGTH << OSC_XOFS_SHIFT); |
| |
| /* |
| * Ambiguous quote from u-boot. TODO: what's this mean? |
| * "should update same value in PMC_OSC_EDPD_OVER XOFS |
| * field for warmboot " |
| */ |
| clrsetbits_le32(&pmc->osc_edpd_over, PMC_OSC_EDPD_OVER_XOFS_MASK, |
| OSC_DRIVE_STRENGTH << PMC_OSC_EDPD_OVER_XOFS_SHIFT); |
| |
| /* Disable IDDQ for PLLX before we set it up (from U-Boot -- why?) */ |
| clrbits_le32(&clk_rst->pllx_misc3, PLLX_IDDQ_MASK); |
| |
| /* Set up PLLP_OUT(1|2|3|4) divisor to generate (9.6|48|102|204)MHz */ |
| write32(&clk_rst->pllp_outa, |
| (CLK_DIVIDER(TEGRA_PLLP_KHZ, 9600) << PLL_OUT_RATIO_SHIFT | |
| PLL_OUT_OVR | PLL_OUT_CLKEN | PLL_OUT_RSTN) << PLL_OUT1_SHIFT | |
| (CLK_DIVIDER(TEGRA_PLLP_KHZ, 48000) << PLL_OUT_RATIO_SHIFT | |
| PLL_OUT_OVR | PLL_OUT_CLKEN | PLL_OUT_RSTN) << PLL_OUT2_SHIFT); |
| write32(&clk_rst->pllp_outb, |
| (CLK_DIVIDER(TEGRA_PLLP_KHZ, 102000) << PLL_OUT_RATIO_SHIFT | |
| PLL_OUT_OVR | PLL_OUT_CLKEN | PLL_OUT_RSTN) << PLL_OUT3_SHIFT | |
| (CLK_DIVIDER(TEGRA_PLLP_KHZ, 204000) << PLL_OUT_RATIO_SHIFT | |
| PLL_OUT_OVR | PLL_OUT_CLKEN | PLL_OUT_RSTN) << PLL_OUT4_SHIFT); |
| |
| /* init pllx */ |
| init_pll(&clk_rst->pllx_base, &clk_rst->pllx_misc, |
| osc_table[osc].pllx, PLLPAXS_MISC_LOCK_ENABLE); |
| |
| /* init pllu */ |
| init_pll(&clk_rst->pllu_base, &clk_rst->pllu_misc, |
| osc_table[osc].pllu, PLLUD_MISC_LOCK_ENABLE); |
| |
| init_utmip_pll(); |
| graphics_pll(); |
| } |
| |
| void clock_enable_clear_reset(u32 l, u32 h, u32 u, u32 v, u32 w, u32 x) |
| { |
| if (l) write32(&clk_rst->clk_enb_l_set, l); |
| if (h) write32(&clk_rst->clk_enb_h_set, h); |
| if (u) write32(&clk_rst->clk_enb_u_set, u); |
| if (v) write32(&clk_rst->clk_enb_v_set, v); |
| if (w) write32(&clk_rst->clk_enb_w_set, w); |
| if (x) write32(&clk_rst->clk_enb_x_set, x); |
| |
| /* Give clocks time to stabilize. */ |
| udelay(IO_STABILIZATION_DELAY); |
| |
| if (l) write32(&clk_rst->rst_dev_l_clr, l); |
| if (h) write32(&clk_rst->rst_dev_h_clr, h); |
| if (u) write32(&clk_rst->rst_dev_u_clr, u); |
| if (v) write32(&clk_rst->rst_dev_v_clr, v); |
| if (w) write32(&clk_rst->rst_dev_w_clr, w); |
| if (x) write32(&clk_rst->rst_dev_x_clr, x); |
| } |
| |
| void clock_reset_l(u32 bit) |
| { |
| write32(&clk_rst->rst_dev_l_set, bit); |
| udelay(1); |
| write32(&clk_rst->rst_dev_l_clr, bit); |
| } |
| |
| void clock_reset_h(u32 bit) |
| { |
| write32(&clk_rst->rst_dev_h_set, bit); |
| udelay(1); |
| write32(&clk_rst->rst_dev_h_clr, bit); |
| } |
| |
| void clock_reset_u(u32 bit) |
| { |
| write32(&clk_rst->rst_dev_u_set, bit); |
| udelay(1); |
| write32(&clk_rst->rst_dev_u_clr, bit); |
| } |
| |
| void clock_reset_v(u32 bit) |
| { |
| write32(&clk_rst->rst_dev_v_set, bit); |
| udelay(1); |
| write32(&clk_rst->rst_dev_v_clr, bit); |
| } |
| |
| void clock_reset_w(u32 bit) |
| { |
| write32(&clk_rst->rst_dev_w_set, bit); |
| udelay(1); |
| write32(&clk_rst->rst_dev_w_clr, bit); |
| } |
| |
| void clock_reset_x(u32 bit) |
| { |
| write32(&clk_rst->rst_dev_x_set, bit); |
| udelay(1); |
| write32(&clk_rst->rst_dev_x_clr, bit); |
| } |