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[68.230.103.25]) by mx.google.com with ESMTPS id gj9sm1535379pbc.16.2012.10.02.15.46.14 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 02 Oct 2012 15:46:16 -0700 (PDT) From: Tom Warren To: u-boot@lists.denx.de Date: Tue, 2 Oct 2012 15:45:49 -0700 Message-Id: <1349217955-8729-2-git-send-email-twarren@nvidia.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1349217955-8729-1-git-send-email-twarren@nvidia.com> References: <1349217955-8729-1-git-send-email-twarren@nvidia.com> X-NVConfidentiality: public Cc: swarren@nvidia.com, Tom Warren , trini@ti.com, twarren.nvidia@gmail.com Subject: [U-Boot] [PATCH 1/7] Tegra30: Add AVP (arm720t) files X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.11 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de This provides SPL support for T30 boards - AVP early init, plus CPU (A9) init/jump to main U-Boot. Signed-off-by: Tom Warren --- arch/arm/cpu/arm720t/tegra-common/cpu.h | 48 +-- arch/arm/cpu/arm720t/tegra-common/spl.c | 3 +- .../arm/cpu/arm720t/tegra30}/Makefile | 20 +- arch/arm/cpu/arm720t/tegra30/config.mk | 19 + arch/arm/cpu/arm720t/tegra30/cpu.c | 516 ++++++++++++++++++++ 5 files changed, 554 insertions(+), 52 deletions(-) copy {board/compal/paz00 => arch/arm/cpu/arm720t/tegra30}/Makefile (68%) create mode 100644 arch/arm/cpu/arm720t/tegra30/config.mk create mode 100644 arch/arm/cpu/arm720t/tegra30/cpu.c diff --git a/arch/arm/cpu/arm720t/tegra-common/cpu.h b/arch/arm/cpu/arm720t/tegra-common/cpu.h index 6804cd7..0d9a3c2 100644 --- a/arch/arm/cpu/arm720t/tegra-common/cpu.h +++ b/arch/arm/cpu/arm720t/tegra-common/cpu.h @@ -44,50 +44,11 @@ #define CORESIGHT_UNLOCK 0xC5ACCE55; -/* AP20-Specific Base Addresses */ - -/* AP20 Base physical address of SDRAM. */ -#define AP20_BASE_PA_SDRAM 0x00000000 -/* AP20 Base physical address of internal SRAM. */ -#define AP20_BASE_PA_SRAM 0x40000000 -/* AP20 Size of internal SRAM (256KB). */ -#define AP20_BASE_PA_SRAM_SIZE 0x00040000 -/* AP20 Base physical address of flash. */ -#define AP20_BASE_PA_NOR_FLASH 0xD0000000 -/* AP20 Base physical address of boot information table. */ -#define AP20_BASE_PA_BOOT_INFO AP20_BASE_PA_SRAM - -/* - * Super-temporary stacks for EXTREMELY early startup. The values chosen for - * these addresses must be valid on ALL SOCs because this value is used before - * we are able to differentiate between the SOC types. - * - * NOTE: The since CPU's stack will eventually be moved from IRAM to SDRAM, its - * stack is placed below the AVP stack. Once the CPU stack has been moved, - * the AVP is free to use the IRAM the CPU stack previously occupied if - * it should need to do so. - * - * NOTE: In multi-processor CPU complex configurations, each processor will have - * its own stack of size CPU_EARLY_BOOT_STACK_SIZE. CPU 0 will have a - * limit of CPU_EARLY_BOOT_STACK_LIMIT. Each successive CPU will have a - * stack limit that is CPU_EARLY_BOOT_STACK_SIZE less then the previous - * CPU. - */ - -/* Common AVP early boot stack limit */ -#define AVP_EARLY_BOOT_STACK_LIMIT \ - (AP20_BASE_PA_SRAM + (AP20_BASE_PA_SRAM_SIZE/2)) -/* Common AVP early boot stack size */ -#define AVP_EARLY_BOOT_STACK_SIZE 0x1000 -/* Common CPU early boot stack limit */ -#define CPU_EARLY_BOOT_STACK_LIMIT \ - (AVP_EARLY_BOOT_STACK_LIMIT - AVP_EARLY_BOOT_STACK_SIZE) -/* Common CPU early boot stack size */ -#define CPU_EARLY_BOOT_STACK_SIZE 0x1000 - #define EXCEP_VECTOR_CPU_RESET_VECTOR (NV_PA_EVP_BASE + 0x100) #define CSITE_CPU_DBG0_LAR (NV_PA_CSITE_BASE + 0x10FB0) #define CSITE_CPU_DBG1_LAR (NV_PA_CSITE_BASE + 0x12FB0) +#define CSITE_CPU_DBG2_LAR (NV_PA_CSITE_BASE + 0x14FB0) +#define CSITE_CPU_DBG3_LAR (NV_PA_CSITE_BASE + 0x16FB0) #define FLOW_CTLR_HALT_COP_EVENTS (NV_PA_FLOW_BASE + 4) #define FLOW_MODE_STOP 2 @@ -95,6 +56,11 @@ #define HALT_COP_EVENT_IRQ_1 (1 << 11) #define HALT_COP_EVENT_FIQ_1 (1 << 9) +#define FLOW_MODE_NONE 0 + +#define SIMPLE_PLLX (CLOCK_ID_XCPU - CLOCK_ID_FIRST_SIMPLE) +#define GP_HIDREV 0x804 + void start_cpu(u32 reset_vector); int ap20_cpu_is_cortexa9(void); void halt_avp(void) __attribute__ ((noreturn)); diff --git a/arch/arm/cpu/arm720t/tegra-common/spl.c b/arch/arm/cpu/arm720t/tegra-common/spl.c index 0d37ce8..2e8d9ca 100644 --- a/arch/arm/cpu/arm720t/tegra-common/spl.c +++ b/arch/arm/cpu/arm720t/tegra-common/spl.c @@ -33,8 +33,6 @@ #include #include #include -#include "cpu.h" - #include #include #include @@ -44,6 +42,7 @@ #include #include #include +#include "cpu.h" DECLARE_GLOBAL_DATA_PTR; diff --git a/board/compal/paz00/Makefile b/arch/arm/cpu/arm720t/tegra30/Makefile similarity index 68% copy from board/compal/paz00/Makefile copy to arch/arm/cpu/arm720t/tegra30/Makefile index 7f7287e..bd96997 100644 --- a/board/compal/paz00/Makefile +++ b/arch/arm/cpu/arm720t/tegra30/Makefile @@ -1,8 +1,8 @@ # # Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved. # -# See file CREDITS for list of people who contributed to this -# project. +# (C) Copyright 2000-2008 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. # # This program is free software; you can redistribute it and/or modify it # under the terms and conditions of the GNU General Public License, @@ -13,20 +13,22 @@ # 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, see . +# include $(TOPDIR)/config.mk -$(shell mkdir -p $(obj)../../nvidia/common) +LIB = $(obj)lib$(SOC).o -LIB = $(obj)lib$(BOARD).o +COBJS-y += cpu.o -COBJS := $(BOARD).o -COBJS += ../../nvidia/common/board.o +SRCS := $(COBJS-y:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS-y)) -SRCS := $(COBJS:.o=.c) -OBJS := $(addprefix $(obj),$(COBJS)) +all: $(obj).depend $(LIB) -$(LIB): $(obj).depend $(OBJS) +$(LIB): $(OBJS) $(call cmd_link_o_target, $(OBJS)) ######################################################################### diff --git a/arch/arm/cpu/arm720t/tegra30/config.mk b/arch/arm/cpu/arm720t/tegra30/config.mk new file mode 100644 index 0000000..2388c56 --- /dev/null +++ b/arch/arm/cpu/arm720t/tegra30/config.mk @@ -0,0 +1,19 @@ +# +# Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved. +# +# (C) Copyright 2002 +# Gary Jennejohn, DENX Software Engineering, +# +# This program is free software; you can redistribute it and/or modify it +# under the terms and conditions of the GNU General Public License, +# version 2, as published by the Free Software Foundation. +# +# This program is distributed in the hope 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, see . +# +USE_PRIVATE_LIBGCC = yes diff --git a/arch/arm/cpu/arm720t/tegra30/cpu.c b/arch/arm/cpu/arm720t/tegra30/cpu.c new file mode 100644 index 0000000..e0821ef --- /dev/null +++ b/arch/arm/cpu/arm720t/tegra30/cpu.c @@ -0,0 +1,516 @@ +/* + * Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "../tegra-common/cpu.h" + +struct clk_pll_table { + u16 n; + u16 m; + u8 p; + u8 cpcon; +}; + +/* ~0=uninitialized/unknown, 0=false, 1=true */ +uint32_t is_tegra_processor_reset = 0xffffffff; + +/* + * Timing tables for each SOC for all four oscillator options. + */ +static struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_COUNT] + [CLOCK_OSC_FREQ_COUNT] = { + /* T20: 1 GHz */ + {{ 1000, 13, 0, 12}, /* OSC 13M */ + { 625, 12, 0, 8}, /* OSC 19.2M */ + { 1000, 12, 0, 12}, /* OSC 12M */ + { 1000, 26, 0, 12}, /* OSC 26M */ + }, + + /* T25: 1.2 GHz */ + {{ 923, 10, 0, 12}, + { 750, 12, 0, 8}, + { 600, 6, 0, 12}, + { 600, 13, 0, 12}, + }, + + /* T30(slow): 1.0 GHz */ + {{ 1000, 13, 0, 8}, + { 625, 12, 0, 4}, + { 1000, 12, 0, 8}, + { 1000, 26, 0, 8}, + }, + + /* T30(high): 1.4 GHz */ + {{ 862, 8, 0, 8}, + { 583, 8, 0, 4}, + { 700, 6, 0, 8}, + { 700, 13, 0, 8}, + }, + + /* TEGRA_SOC2_SLOW: 312 MHz */ + {{ 312, 13, 0, 12}, /* OSC 13M */ + { 260, 16, 0, 8}, /* OSC 19.2M */ + { 312, 12, 0, 12}, /* OSC 12M */ + { 312, 26, 0, 12}, /* OSC 26M */ + }, +}; + +enum tegra_family_t { + TEGRA_FAMILY_T2x, + TEGRA_FAMILY_T3x, +}; + +static int get_chip_type(void) +{ + /* + * T30 has two options. We will return TEGRA_SOC_T30 until + * we have the fdt set up when it may change to + * TEGRA_SOC_T30_408MHZ depending on what we set PLLP to. + */ + if (clock_get_rate(CLOCK_ID_PERIPH) == 408000000) + return TEGRA_SOC_T30_408MHZ; + else + return TEGRA_SOC_T30; +} + +static enum tegra_family_t get_family(void) +{ + u32 reg, chip_id; + + debug("tegra_get_family entry\n"); + reg = readl(NV_PA_APB_MISC_BASE + GP_HIDREV); + + chip_id = reg >> 8; + chip_id &= 0xff; + debug(" tegra_get_family: chip_id = %x\n", chip_id); + if (chip_id == 0x30) + return TEGRA_FAMILY_T3x; + else + return TEGRA_FAMILY_T2x; +} + +int get_num_cpus(void) +{ + return get_family() == TEGRA_FAMILY_T3x ? 4 : 2; +} + +static void adjust_pllp_out_freqs(void) +{ + struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; + struct clk_pll *pll = &clkrst->crc_pll[CLOCK_ID_PERIPH]; + u32 reg; + + /* Set T30 PLLP_OUT1, 2, 3 & 4 freqs to 9.6, 48, 102 & 204MHz */ + reg = readl(&pll->pll_out[0]); /* OUTA, contains OUT2 / OUT1 */ + reg |= (IN_408_OUT_48_DIVISOR << PLLP_OUT2_RATIO) | PLLP_OUT2_OVR + | (IN_408_OUT_9_6_DIVISOR << PLLP_OUT1_RATIO) | PLLP_OUT1_OVR; + writel(reg, &pll->pll_out[0]); + + reg = readl(&pll->pll_out[1]); /* OUTB, contains OUT4 / OUT3 */ + reg |= (IN_408_OUT_204_DIVISOR << PLLP_OUT4_RATIO) | PLLP_OUT4_OVR + | (IN_408_OUT_102_DIVISOR << PLLP_OUT3_RATIO) | PLLP_OUT3_OVR; + writel(reg, &pll->pll_out[1]); +} + +static int pllx_set_rate(struct clk_pll_simple *pll , u32 divn, u32 divm, + u32 divp, u32 cpcon) +{ + u32 reg; + + /* If PLLX is already enabled, just return */ + if (readl(&pll->pll_base) & PLL_ENABLE_MASK) { + debug("pllx_set_rate: PLLX already enabled, returning\n"); + return 0; + } + + debug(" pllx_set_rate entry\n"); + + /* Set BYPASS, m, n and p to PLLX_BASE */ + reg = PLL_BYPASS_MASK | (divm << PLL_DIVM_SHIFT); + reg |= ((divn << PLL_DIVN_SHIFT) | (divp << PLL_DIVP_SHIFT)); + writel(reg, &pll->pll_base); + + /* Set cpcon to PLLX_MISC */ + reg = (cpcon << PLL_CPCON_SHIFT); + + /* Set dccon to PLLX_MISC if freq > 600MHz */ + if (divn > 600) + reg |= (1 << PLL_DCCON_SHIFT); + writel(reg, &pll->pll_misc); + + /* Enable PLLX */ + reg = readl(&pll->pll_base); + reg |= PLL_ENABLE_MASK; + + /* Disable BYPASS */ + reg &= ~PLL_BYPASS_MASK; + writel(reg, &pll->pll_base); + + /* Set lock_enable to PLLX_MISC */ + reg = readl(&pll->pll_misc); + reg |= PLL_LOCK_ENABLE_MASK; + writel(reg, &pll->pll_misc); + + return 0; +} + +void init_pllx(int slow) +{ + struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; + struct clk_pll_simple *pll = &clkrst->crc_pll_simple[SIMPLE_PLLX]; + int chip_type; + enum clock_osc_freq osc; + struct clk_pll_table *sel; + + debug("init_pllx entry\n"); + + /* get chip type. If unknown, assign to T30 */ + chip_type = get_chip_type(); + debug(" init_pllx: chip_type = %d\n", chip_type); + + /* get osc freq */ + osc = clock_get_osc_freq(); + debug(" init_pllx: osc = %d\n", osc); + + /* set pllx */ + sel = &tegra_pll_x_table[chip_type][osc]; + pllx_set_rate(pll, sel->n, sel->m, sel->p, sel->cpcon); + + /* once we are out of slow mode, set up the T30 PLLs also */ + if (!slow && chip_type == TEGRA_SOC_T30_408MHZ) { + debug(" init_pllx: adjusting PLLP out freqs\n"); + adjust_pllp_out_freqs(); + } +} + +static void enable_cpu_clock(int enable) +{ + struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; + u32 clk; + + debug("enable_cpu_clock entry, enable = %d\n", enable); + /* + * NOTE: + * Regardless of whether the request is to enable or disable the CPU + * clock, every processor in the CPU complex except the master (CPU 0) + * will have it's clock stopped because the AVP only talks to the + * master. The AVP does not know (nor does it need to know) that there + * are multiple processors in the CPU complex. + */ + + if (enable) { + /* Initialize PLLX in 'slow' mode */ + init_pllx(1); + + /* Wait until all clocks are stable */ + udelay(PLL_STABILIZATION_DELAY); + + writel(CCLK_BURST_POLICY, &clkrst->crc_cclk_brst_pol); + writel(SUPER_CCLK_DIVIDER, &clkrst->crc_super_cclk_div); + } + + /* + * Read the register containing the individual CPU clock enables and + * always stop the clock to CPUs 1, 2 & 3. + */ + clk = readl(&clkrst->crc_clk_cpu_cmplx); + clk |= 1 << CPU1_CLK_STP_SHIFT; + clk |= 1 << CPU2_CLK_STP_SHIFT; + clk |= 1 << CPU3_CLK_STP_SHIFT; + + /* Stop/Unstop the CPU clock */ + clk &= ~CPU0_CLK_STP_MASK; + clk |= !enable << CPU0_CLK_STP_SHIFT; + writel(clk, &clkrst->crc_clk_cpu_cmplx); + + clock_enable(PERIPH_ID_CPU); + debug("enable_cpu_clock entry, enabled CPU clock\n"); +} + +static int is_cpu_powered(void) +{ + struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + + debug("is_cpu_powered entry\n"); + return (readl(&pmc->pmc_pwrgate_status) & CPU_PWRED) ? 1 : 0; +} + +static void remove_cpu_io_clamps(void) +{ + struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + u32 reg; + + debug("remove_cpu_io_clamps entry\n"); + /* Remove the clamps on the CPU I/O signals */ + reg = readl(&pmc->pmc_remove_clamping); + reg |= CPU_CLMP; + writel(reg, &pmc->pmc_remove_clamping); + + /* Give I/O signals time to stabilize */ + udelay(IO_STABILIZATION_DELAY); +} + +static void powerup_cpu(void) +{ + struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + u32 reg; + int timeout = IO_STABILIZATION_DELAY; + + debug("powerup_cpu entry\n"); + if (!is_cpu_powered()) { + /* Toggle the CPU power state (OFF -> ON) */ + reg = readl(&pmc->pmc_pwrgate_toggle); + reg &= PARTID_CP; + reg |= START_CP; + writel(reg, &pmc->pmc_pwrgate_toggle); + + /* Wait for the power to come up */ + while (!is_cpu_powered()) { + if (timeout-- == 0) + printf("CPU failed to power up!\n"); + else + udelay(10); + } + + /* + * Remove the I/O clamps from CPU power partition. + * Recommended only on a Warm boot, if the CPU partition gets + * power gated. Shouldn't cause any harm when called after a + * cold boot according to HW, probably just redundant. + */ + remove_cpu_io_clamps(); + } +} + +void tegra_i2c_ll_write_addr(uint addr, uint config) +{ + struct i2c_ctlr *reg = (struct i2c_ctlr *)TEGRA_DVC_BASE; + + writel(addr, ®->cmd_addr0); + writel(config, ®->cnfg); +} + +void tegra_i2c_ll_write_data(uint data, uint config) +{ + struct i2c_ctlr *reg = (struct i2c_ctlr *)TEGRA_DVC_BASE; + + writel(data, ®->cmd_data1); + writel(config, ®->cnfg); +} + +static void enable_cpu_power_rail(void) +{ + struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE; + u32 reg; + + debug("enable_cpu_power_rail entry\n"); + reg = readl(&pmc->pmc_cntrl); + reg |= CPUPWRREQ_OE; + writel(reg, &pmc->pmc_cntrl); + + /* + * Pulse PWRREQ via I2C. We need to find out what this is + * doing, tidy up the code and maybe find a better place for it. + */ + tegra_i2c_ll_write_addr(0x005a, 0x0002); + tegra_i2c_ll_write_data(0x2328, 0x0a02); + udelay(1000); + tegra_i2c_ll_write_data(0x0127, 0x0a02); + udelay(10 * 1000); +} + +static void reset_A9_cpu(int reset) +{ + /* + * NOTE: Regardless of whether the request is to hold the CPU in reset + * or take it out of reset, every processor in the CPU complex + * except the master (CPU 0) will be held in reset because the + * AVP only talks to the master. The AVP does not know that there + * are multiple processors in the CPU complex. + */ + int mask = crc_rst_cpu | crc_rst_de | crc_rst_debug; + int num_cpus = get_num_cpus(); + int cpu; + + debug("reset_a9_cpu entry\n"); + /* Hold CPUs 1 onwards in reset, and CPU 0 if asked */ + for (cpu = 1; cpu < num_cpus; cpu++) + reset_cmplx_set_enable(cpu, mask, 1); + reset_cmplx_set_enable(0, mask, reset); + + /* Enable/Disable master CPU reset */ + reset_set_enable(PERIPH_ID_CPU, reset); +} + +/** + * The T30 requires some special clock initialization, including setting up + * the dvc i2c, turning on mselect and selecting the G CPU cluster + */ +void t30_init_clocks(void) +{ + struct clk_rst_ctlr *clkrst = + (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; + struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE; + u32 val; + + debug("t30_init_clocks entry\n"); + /* Set active CPU cluster to G */ + clrbits_le32(flow->cluster_control, 1 << 0); + + /* + * Switch system clock to PLLP_OUT4 (108 MHz), AVP will now run + * at 108 MHz. This is glitch free as only the source is changed, no + * special precaution needed. + */ + val = (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_FIQ_SOURCE_SHIFT) | + (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_IRQ_SOURCE_SHIFT) | + (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_RUN_SOURCE_SHIFT) | + (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_IDLE_SOURCE_SHIFT) | + (SCLK_SYS_STATE_RUN << SCLK_SYS_STATE_SHIFT); + writel(val, &clkrst->crc_sclk_brst_pol); + + writel(SUPER_SCLK_ENB_MASK, &clkrst->crc_super_sclk_div); + + val = (0 << CLK_SYS_RATE_HCLK_DISABLE_SHIFT) | + (1 << CLK_SYS_RATE_AHB_RATE_SHIFT) | + (0 << CLK_SYS_RATE_PCLK_DISABLE_SHIFT) | + (0 << CLK_SYS_RATE_APB_RATE_SHIFT); + writel(val, &clkrst->crc_clk_sys_rate); + + /* Put i2c, mselect in reset and enable clocks */ + reset_set_enable(PERIPH_ID_DVC_I2C, 1); + clock_set_enable(PERIPH_ID_DVC_I2C, 1); + reset_set_enable(PERIPH_ID_MSELECT, 1); + clock_set_enable(PERIPH_ID_MSELECT, 1); + + /* Switch MSELECT clock to PLLP (00) */ + clock_ll_set_source(PERIPH_ID_MSELECT, 0); + + /* + * Our high-level clock routines are not available prior to + * relocation. We use the low-level functions which require a + * hard-coded divisor. Use CLK_M with divide by (n + 1 = 17) + */ + clock_ll_set_source_divisor(PERIPH_ID_DVC_I2C, 3, 16); + + /* + * Give clocks time to stabilize, then take i2c and mselect out of + * reset + */ + udelay(1000); + reset_set_enable(PERIPH_ID_DVC_I2C, 0); + reset_set_enable(PERIPH_ID_MSELECT, 0); +} + +static void clock_enable_coresight(int enable) +{ + u32 rst, src; + + debug("clock_enable_coresight entry\n"); + clock_set_enable(PERIPH_ID_CORESIGHT, enable); + reset_set_enable(PERIPH_ID_CORESIGHT, !enable); + + if (enable) { + /* + * Put CoreSight on PLLP_OUT0 (216 MHz) and divide it down by + * 1.5, giving an effective frequency of 144MHz. + * Set PLLP_OUT0 [bits31:30 = 00], and use a 7.1 divisor + * (bits 7:0), so 00000001b == 1.5 (n+1 + .5) + * + * Clock divider request for 204MHz would setup CSITE clock as + * 144MHz for PLLP base 216MHz and 204MHz for PLLP base 408MHz + */ + if (get_chip_type() == TEGRA_SOC_T30_408MHZ) + src = CLK_DIVIDER(NVBL_PLLP_KHZ, 204000); + else + src = CLK_DIVIDER(NVBL_PLLP_KHZ, 144000); + clock_ll_set_source_divisor(PERIPH_ID_CSI, 0, src); + + /* Unlock the CPU CoreSight interfaces */ + rst = CORESIGHT_UNLOCK; + writel(rst, CSITE_CPU_DBG0_LAR); + writel(rst, CSITE_CPU_DBG1_LAR); + writel(rst, CSITE_CPU_DBG2_LAR); + writel(rst, CSITE_CPU_DBG3_LAR); + } +} + +static void set_cpu_running(int run) +{ + struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE; + + debug("set_cpu_running entry, run = %d\n", run); + writel(run ? FLOW_MODE_NONE : FLOW_MODE_STOP, &flow->halt_cpu_events); +} + +void start_cpu(u32 reset_vector) +{ + debug("start_cpu entry, reset_vector = %x\n", reset_vector); + t30_init_clocks(); + + /* Enable VDD_CPU */ + enable_cpu_power_rail(); + + set_cpu_running(0); + + /* Hold the CPUs in reset */ + reset_A9_cpu(1); + + /* Disable the CPU clock */ + enable_cpu_clock(0); + + /* Enable CoreSight */ + clock_enable_coresight(1); + + /* + * Set the entry point for CPU execution from reset, + * if it's a non-zero value. + */ + if (reset_vector) + writel(reset_vector, EXCEP_VECTOR_CPU_RESET_VECTOR); + + /* Enable the CPU clock */ + enable_cpu_clock(1); + + /* If the CPU doesn't already have power, power it up */ + powerup_cpu(); + + /* Take the CPU out of reset */ + reset_A9_cpu(0); + + set_cpu_running(1); +} + + +void halt_avp(void) +{ + debug("halt_avp entry\n"); + for (;;) { + writel((HALT_COP_EVENT_JTAG | HALT_COP_EVENT_IRQ_1 \ + | HALT_COP_EVENT_FIQ_1 | (FLOW_MODE_STOP<<29)), + FLOW_CTLR_HALT_COP_EVENTS); + } +}