2 * Copyright (c) 2010-2014, NVIDIA CORPORATION. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <asm/arch/clock.h>
20 #include <asm/arch/flow.h>
21 #include <asm/arch/pinmux.h>
22 #include <asm/arch/tegra.h>
23 #include <asm/arch-tegra/clk_rst.h>
24 #include <asm/arch-tegra/pmc.h>
25 #include "../tegra-common/cpu.h"
27 /* Tegra114-specific CPU init code */
28 static void enable_cpu_power_rail(void)
30 struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
31 struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
34 debug("enable_cpu_power_rail entry\n");
36 /* un-tristate PWR_I2C SCL/SDA, rest of the defaults are correct */
37 pinmux_tristate_disable(PINGRP_PWR_I2C_SCL);
38 pinmux_tristate_disable(PINGRP_PWR_I2C_SDA);
41 * Set CPUPWRGOOD_TIMER - APB clock is 1/2 of SCLK (102MHz),
42 * set it for 25ms (102MHz * .025)
45 writel(reg, &pmc->pmc_cpupwrgood_timer);
47 /* Set polarity to 0 (normal) and enable CPUPWRREQ_OE */
48 clrbits_le32(&pmc->pmc_cntrl, CPUPWRREQ_POL);
49 setbits_le32(&pmc->pmc_cntrl, CPUPWRREQ_OE);
52 * Set CLK_RST_CONTROLLER_CPU_SOFTRST_CTRL2_0_CAR2PMC_CPU_ACK_WIDTH
53 * to 408 to satisfy the requirement of having at least 16 CPU clock
54 * cycles before clamp removal.
57 clrbits_le32(&clkrst->crc_cpu_softrst_ctrl2, 0xFFF);
58 setbits_le32(&clkrst->crc_cpu_softrst_ctrl2, 408);
61 static void enable_cpu_clocks(void)
63 struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
66 debug("enable_cpu_clocks entry\n");
68 /* Wait for PLL-X to lock */
70 reg = readl(&clkrst->crc_pll_simple[SIMPLE_PLLX].pll_base);
71 } while ((reg & PLL_LOCK_MASK) == 0);
73 /* Wait until all clocks are stable */
74 udelay(PLL_STABILIZATION_DELAY);
76 writel(CCLK_BURST_POLICY, &clkrst->crc_cclk_brst_pol);
77 writel(SUPER_CCLK_DIVIDER, &clkrst->crc_super_cclk_div);
79 /* Always enable the main CPU complex clocks */
80 clock_enable(PERIPH_ID_CPU);
81 clock_enable(PERIPH_ID_CPULP);
82 clock_enable(PERIPH_ID_CPUG);
85 static void remove_cpu_resets(void)
87 struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
90 debug("remove_cpu_resets entry\n");
91 /* Take the slow non-CPU partition out of reset */
92 reg = readl(&clkrst->crc_rst_cpulp_cmplx_clr);
93 writel((reg | CLR_NONCPURESET), &clkrst->crc_rst_cpulp_cmplx_clr);
95 /* Take the fast non-CPU partition out of reset */
96 reg = readl(&clkrst->crc_rst_cpug_cmplx_clr);
97 writel((reg | CLR_NONCPURESET), &clkrst->crc_rst_cpug_cmplx_clr);
99 /* Clear the SW-controlled reset of the slow cluster */
100 reg = readl(&clkrst->crc_rst_cpulp_cmplx_clr);
101 reg |= (CLR_CPURESET0+CLR_DBGRESET0+CLR_CORERESET0+CLR_CXRESET0);
102 writel(reg, &clkrst->crc_rst_cpulp_cmplx_clr);
104 /* Clear the SW-controlled reset of the fast cluster */
105 reg = readl(&clkrst->crc_rst_cpug_cmplx_clr);
106 reg |= (CLR_CPURESET0+CLR_DBGRESET0+CLR_CORERESET0+CLR_CXRESET0);
107 reg |= (CLR_CPURESET1+CLR_DBGRESET1+CLR_CORERESET1+CLR_CXRESET1);
108 reg |= (CLR_CPURESET2+CLR_DBGRESET2+CLR_CORERESET2+CLR_CXRESET2);
109 reg |= (CLR_CPURESET3+CLR_DBGRESET3+CLR_CORERESET3+CLR_CXRESET3);
110 writel(reg, &clkrst->crc_rst_cpug_cmplx_clr);
114 * The T114 requires some special clock initialization, including setting up
115 * the DVC I2C, turning on MSELECT and selecting the G CPU cluster
117 void t114_init_clocks(void)
119 struct clk_rst_ctlr *clkrst =
120 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
121 struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
124 debug("t114_init_clocks entry\n");
126 /* Set active CPU cluster to G */
127 clrbits_le32(&flow->cluster_control, 1);
129 writel(SUPER_SCLK_ENB_MASK, &clkrst->crc_super_sclk_div);
131 debug("Setting up PLLX\n");
134 val = (1 << CLK_SYS_RATE_AHB_RATE_SHIFT);
135 writel(val, &clkrst->crc_clk_sys_rate);
137 /* Enable clocks to required peripherals. TBD - minimize this list */
138 debug("Enabling clocks\n");
140 clock_set_enable(PERIPH_ID_CACHE2, 1);
141 clock_set_enable(PERIPH_ID_GPIO, 1);
142 clock_set_enable(PERIPH_ID_TMR, 1);
143 clock_set_enable(PERIPH_ID_RTC, 1);
144 clock_set_enable(PERIPH_ID_CPU, 1);
145 clock_set_enable(PERIPH_ID_EMC, 1);
146 clock_set_enable(PERIPH_ID_I2C5, 1);
147 clock_set_enable(PERIPH_ID_FUSE, 1);
148 clock_set_enable(PERIPH_ID_PMC, 1);
149 clock_set_enable(PERIPH_ID_APBDMA, 1);
150 clock_set_enable(PERIPH_ID_MEM, 1);
151 clock_set_enable(PERIPH_ID_IRAMA, 1);
152 clock_set_enable(PERIPH_ID_IRAMB, 1);
153 clock_set_enable(PERIPH_ID_IRAMC, 1);
154 clock_set_enable(PERIPH_ID_IRAMD, 1);
155 clock_set_enable(PERIPH_ID_CORESIGHT, 1);
156 clock_set_enable(PERIPH_ID_MSELECT, 1);
157 clock_set_enable(PERIPH_ID_EMC1, 1);
158 clock_set_enable(PERIPH_ID_MC1, 1);
159 clock_set_enable(PERIPH_ID_DVFS, 1);
162 * Set MSELECT clock source as PLLP (00), and ask for a clock
163 * divider that would set the MSELECT clock at 102MHz for a
164 * PLLP base of 408MHz.
166 clock_ll_set_source_divisor(PERIPH_ID_MSELECT, 0,
167 CLK_DIVIDER(NVBL_PLLP_KHZ, 102000));
169 /* I2C5 (DVC) gets CLK_M and a divisor of 17 */
170 clock_ll_set_source_divisor(PERIPH_ID_I2C5, 3, 16);
172 /* Give clocks time to stabilize */
175 /* Take required peripherals out of reset */
176 debug("Taking periphs out of reset\n");
177 reset_set_enable(PERIPH_ID_CACHE2, 0);
178 reset_set_enable(PERIPH_ID_GPIO, 0);
179 reset_set_enable(PERIPH_ID_TMR, 0);
180 reset_set_enable(PERIPH_ID_COP, 0);
181 reset_set_enable(PERIPH_ID_EMC, 0);
182 reset_set_enable(PERIPH_ID_I2C5, 0);
183 reset_set_enable(PERIPH_ID_FUSE, 0);
184 reset_set_enable(PERIPH_ID_APBDMA, 0);
185 reset_set_enable(PERIPH_ID_MEM, 0);
186 reset_set_enable(PERIPH_ID_CORESIGHT, 0);
187 reset_set_enable(PERIPH_ID_MSELECT, 0);
188 reset_set_enable(PERIPH_ID_EMC1, 0);
189 reset_set_enable(PERIPH_ID_MC1, 0);
190 reset_set_enable(PERIPH_ID_DVFS, 0);
192 debug("t114_init_clocks exit\n");
195 static bool is_partition_powered(u32 partid)
197 struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
200 /* Get power gate status */
201 reg = readl(&pmc->pmc_pwrgate_status);
202 return !!(reg & (1 << partid));
205 static bool is_clamp_enabled(u32 partid)
207 struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
210 /* Get clamp status. */
211 reg = readl(&pmc->pmc_clamp_status);
212 return !!(reg & (1 << partid));
215 static void power_partition(u32 partid)
217 struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
219 debug("%s: part ID = %08X\n", __func__, partid);
220 /* Is the partition already on? */
221 if (!is_partition_powered(partid)) {
222 /* No, toggle the partition power state (OFF -> ON) */
223 debug("power_partition, toggling state\n");
224 writel(START_CP | partid, &pmc->pmc_pwrgate_toggle);
226 /* Wait for the power to come up */
227 while (!is_partition_powered(partid))
230 /* Wait for the clamp status to be cleared */
231 while (is_clamp_enabled(partid))
234 /* Give I/O signals time to stabilize */
235 udelay(IO_STABILIZATION_DELAY);
239 void powerup_cpus(void)
241 debug("powerup_cpus entry\n");
243 /* We boot to the fast cluster */
244 debug("powerup_cpus entry: G cluster\n");
245 /* Power up the fast cluster rail partition */
246 power_partition(CRAIL);
248 /* Power up the fast cluster non-CPU partition */
249 power_partition(C0NC);
251 /* Power up the fast cluster CPU0 partition */
252 power_partition(CE0);
255 void start_cpu(u32 reset_vector)
259 debug("start_cpu entry, reset_vector = %x\n", reset_vector);
264 enable_cpu_power_rail();
266 /* Get the CPU(s) running */
269 /* Enable CoreSight */
270 clock_enable_coresight(1);
272 /* Take CPU(s) out of reset */
275 /* Set the entry point for CPU execution from reset */
278 * A01P with patched boot ROM; vector hard-coded to 0x4003fffc.
279 * See nvbug 1193357 for details.
282 /* mov r0, #lsb(reset_vector) */
283 imme = reset_vector & 0xffff;
285 inst |= ((imme >> 12) << 16);
287 writel(inst, 0x4003fff0);
289 /* movt r0, #msb(reset_vector) */
290 imme = (reset_vector >> 16) & 0xffff;
292 inst |= ((imme >> 12) << 16);
294 writel(inst, 0x4003fff4);
297 writel(0xe12fff10, 0x4003fff8);
301 inst = (imme >> 2) & 0xffffff;
303 writel(inst, 0x4003fffc);
305 /* Write to orignal location for compatibility */
306 writel(reset_vector, EXCEP_VECTOR_CPU_RESET_VECTOR);
308 /* If the CPU(s) don't already have power, power 'em up */