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u-boot/arch/arm/mach-tegra/cpu.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

414 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2010-2015, NVIDIA CORPORATION. All rights reserved.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/gp_padctrl.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/scu.h>
#include "cpu.h"
int get_num_cpus(void)
{
struct apb_misc_gp_ctlr *gp;
uint rev;
debug("%s entry\n", __func__);
gp = (struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
rev = (readl(&gp->hidrev) & HIDREV_CHIPID_MASK) >> HIDREV_CHIPID_SHIFT;
switch (rev) {
case CHIPID_TEGRA20:
return 2;
break;
case CHIPID_TEGRA30:
case CHIPID_TEGRA114:
case CHIPID_TEGRA124:
case CHIPID_TEGRA210:
default:
return 4;
break;
}
}
/*
* Timing tables for each SOC for all four oscillator options.
*/
struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_CNT][CLOCK_OSC_FREQ_COUNT] = {
/*
* T20: 1 GHz
*
* Register Field Bits Width
* ------------------------------
* PLLX_BASE p 22:20 3
* PLLX_BASE n 17: 8 10
* PLLX_BASE m 4: 0 5
* PLLX_MISC cpcon 11: 8 4
*/
{
{ .n = 1000, .m = 13, .p = 0, .cpcon = 12 }, /* OSC: 13.0 MHz */
{ .n = 625, .m = 12, .p = 0, .cpcon = 8 }, /* OSC: 19.2 MHz */
{ .n = 1000, .m = 12, .p = 0, .cpcon = 12 }, /* OSC: 12.0 MHz */
{ .n = 1000, .m = 26, .p = 0, .cpcon = 12 }, /* OSC: 26.0 MHz */
{ .n = 0, .m = 0, .p = 0, .cpcon = 0 }, /* OSC: 38.4 MHz (N/A) */
{ .n = 0, .m = 0, .p = 0, .cpcon = 0 }, /* OSC: 48.0 MHz (N/A) */
},
/*
* T25: 1.2 GHz
*
* Register Field Bits Width
* ------------------------------
* PLLX_BASE p 22:20 3
* PLLX_BASE n 17: 8 10
* PLLX_BASE m 4: 0 5
* PLLX_MISC cpcon 11: 8 4
*/
{
{ .n = 923, .m = 10, .p = 0, .cpcon = 12 }, /* OSC: 13.0 MHz */
{ .n = 750, .m = 12, .p = 0, .cpcon = 8 }, /* OSC: 19.2 MHz */
{ .n = 600, .m = 6, .p = 0, .cpcon = 12 }, /* OSC: 12.0 MHz */
{ .n = 600, .m = 13, .p = 0, .cpcon = 12 }, /* OSC: 26.0 MHz */
{ .n = 0, .m = 0, .p = 0, .cpcon = 0 }, /* OSC: 38.4 MHz (N/A) */
{ .n = 0, .m = 0, .p = 0, .cpcon = 0 }, /* OSC: 48.0 MHz (N/A) */
},
/*
* T30: 600 MHz
*
* Register Field Bits Width
* ------------------------------
* PLLX_BASE p 22:20 3
* PLLX_BASE n 17: 8 10
* PLLX_BASE m 4: 0 5
* PLLX_MISC cpcon 11: 8 4
*/
{
{ .n = 600, .m = 13, .p = 0, .cpcon = 8 }, /* OSC: 13.0 MHz */
{ .n = 500, .m = 16, .p = 0, .cpcon = 8 }, /* OSC: 19.2 MHz */
{ .n = 600, .m = 12, .p = 0, .cpcon = 8 }, /* OSC: 12.0 MHz */
{ .n = 600, .m = 26, .p = 0, .cpcon = 8 }, /* OSC: 26.0 MHz */
{ .n = 0, .m = 0, .p = 0, .cpcon = 0 }, /* OSC: 38.4 MHz (N/A) */
{ .n = 0, .m = 0, .p = 0, .cpcon = 0 }, /* OSC: 48.0 MHz (N/A) */
},
/*
* T114: 700 MHz
*
* Register Field Bits Width
* ------------------------------
* PLLX_BASE p 23:20 4
* PLLX_BASE n 15: 8 8
* PLLX_BASE m 7: 0 8
*/
{
{ .n = 108, .m = 1, .p = 1 }, /* OSC: 13.0 MHz */
{ .n = 73, .m = 1, .p = 1 }, /* OSC: 19.2 MHz */
{ .n = 116, .m = 1, .p = 1 }, /* OSC: 12.0 MHz */
{ .n = 108, .m = 2, .p = 1 }, /* OSC: 26.0 MHz */
{ .n = 0, .m = 0, .p = 0 }, /* OSC: 38.4 MHz (N/A) */
{ .n = 0, .m = 0, .p = 0 }, /* OSC: 48.0 MHz (N/A) */
},
/*
* T124: 700 MHz
*
* Register Field Bits Width
* ------------------------------
* PLLX_BASE p 23:20 4
* PLLX_BASE n 15: 8 8
* PLLX_BASE m 7: 0 8
*/
{
{ .n = 108, .m = 1, .p = 1 }, /* OSC: 13.0 MHz */
{ .n = 73, .m = 1, .p = 1 }, /* OSC: 19.2 MHz */
{ .n = 116, .m = 1, .p = 1 }, /* OSC: 12.0 MHz */
{ .n = 108, .m = 2, .p = 1 }, /* OSC: 26.0 MHz */
{ .n = 0, .m = 0, .p = 0 }, /* OSC: 38.4 MHz (N/A) */
{ .n = 0, .m = 0, .p = 0 }, /* OSC: 48.0 MHz (N/A) */
},
/*
* T210: 700 MHz
*
* Register Field Bits Width
* ------------------------------
* PLLX_BASE p 24:20 5
* PLLX_BASE n 15: 8 8
* PLLX_BASE m 7: 0 8
*/
{
{ .n = 108, .m = 1, .p = 1 }, /* OSC: 13.0 MHz = 702 MHz*/
{ .n = 73, .m = 1, .p = 1 }, /* OSC: 19.2 MHz = 700.8 MHz*/
{ .n = 116, .m = 1, .p = 1 }, /* OSC: 12.0 MHz = 696 MHz*/
{ .n = 108, .m = 2, .p = 1 }, /* OSC: 26.0 MHz = 702 MHz*/
{ .n = 36, .m = 1, .p = 1 }, /* OSC: 38.4 MHz = 691.2 MHz */
{ .n = 58, .m = 2, .p = 1 }, /* OSC: 48.0 MHz = 696 MHz */
},
};
static inline void pllx_set_iddq(void)
{
#if defined(CONFIG_TEGRA124) || defined(CONFIG_TEGRA210)
struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
u32 reg;
debug("%s entry\n", __func__);
/* Disable IDDQ */
reg = readl(&clkrst->crc_pllx_misc3);
reg &= ~PLLX_IDDQ_MASK;
writel(reg, &clkrst->crc_pllx_misc3);
udelay(2);
debug("%s: IDDQ: PLLX IDDQ = 0x%08X\n", __func__,
readl(&clkrst->crc_pllx_misc3));
#endif
}
int pllx_set_rate(struct clk_pll_simple *pll , u32 divn, u32 divm,
u32 divp, u32 cpcon)
{
struct clk_pll_info *pllinfo = &tegra_pll_info_table[CLOCK_ID_XCPU];
int chip = tegra_get_chip();
u32 reg;
debug("%s entry\n", __func__);
/* If PLLX is already enabled, just return */
if (readl(&pll->pll_base) & PLL_ENABLE_MASK) {
debug("%s: PLLX already enabled, returning\n", __func__);
return 0;
}
pllx_set_iddq();
/* Set BYPASS, m, n and p to PLLX_BASE */
reg = PLL_BYPASS_MASK | (divm << pllinfo->m_shift);
reg |= (divn << pllinfo->n_shift) | (divp << pllinfo->p_shift);
writel(reg, &pll->pll_base);
/* Set cpcon to PLLX_MISC */
if (chip == CHIPID_TEGRA20 || chip == CHIPID_TEGRA30)
reg = (cpcon << pllinfo->kcp_shift);
else
reg = 0;
/*
* TODO(twarren@nvidia.com) Check which SoCs use DCCON
* and add to pllinfo table if needed!
*/
/* Set dccon to PLLX_MISC if freq > 600MHz */
if (divn > 600)
reg |= (1 << PLL_DCCON_SHIFT);
writel(reg, &pll->pll_misc);
/* Disable BYPASS */
reg = readl(&pll->pll_base);
reg &= ~PLL_BYPASS_MASK;
writel(reg, &pll->pll_base);
debug("%s: base = 0x%08X\n", __func__, reg);
/* Set lock_enable to PLLX_MISC if lock_ena is valid (i.e. 0-31) */
reg = readl(&pll->pll_misc);
if (pllinfo->lock_ena < 32)
reg |= (1 << pllinfo->lock_ena);
writel(reg, &pll->pll_misc);
debug("%s: misc = 0x%08X\n", __func__, reg);
/* Enable PLLX last, once it's all configured */
reg = readl(&pll->pll_base);
reg |= PLL_ENABLE_MASK;
writel(reg, &pll->pll_base);
debug("%s: base final = 0x%08X\n", __func__, reg);
return 0;
}
void init_pllx(void)
{
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 soc_type, sku_info, chip_sku;
enum clock_osc_freq osc;
struct clk_pll_table *sel;
debug("%s entry\n", __func__);
/* get SOC (chip) type */
soc_type = tegra_get_chip();
debug("%s: SoC = 0x%02X\n", __func__, soc_type);
/* get SKU info */
sku_info = tegra_get_sku_info();
debug("%s: SKU info byte = 0x%02X\n", __func__, sku_info);
/* get chip SKU, combo of the above info */
chip_sku = tegra_get_chip_sku();
debug("%s: Chip SKU = %d\n", __func__, chip_sku);
/* get osc freq */
osc = clock_get_osc_freq();
debug("%s: osc = %d\n", __func__, osc);
/* set pllx */
sel = &tegra_pll_x_table[chip_sku][osc];
pllx_set_rate(pll, sel->n, sel->m, sel->p, sel->cpcon);
}
void enable_cpu_clock(int enable)
{
struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
u32 clk;
debug("%s entry\n", __func__);
/*
* 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.
*/
if (enable) {
/* Initialize PLLX */
init_pllx();
/* 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 clocks to CPUs > 0.
*/
clk = readl(&clkrst->crc_clk_cpu_cmplx);
clk |= 1 << CPU1_CLK_STP_SHIFT;
if (get_num_cpus() == 4)
clk |= (1 << CPU2_CLK_STP_SHIFT) + (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);
}
static int is_cpu_powered(void)
{
struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
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("%s entry\n", __func__);
/* 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);
}
void powerup_cpu(void)
{
struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
u32 reg;
int timeout = IO_STABILIZATION_DELAY;
debug("%s entry\n", __func__);
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 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("%s entry\n", __func__);
/* 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);
}
void clock_enable_coresight(int enable)
{
u32 rst, src = 2;
debug("%s entry\n", __func__);
clock_set_enable(PERIPH_ID_CORESIGHT, enable);
reset_set_enable(PERIPH_ID_CORESIGHT, !enable);
if (enable) {
/*
* Put CoreSight on PLLP_OUT0 and divide it down as per
* PLLP base frequency based on SoC type (T20/T30+).
* Clock divider request would setup CSITE clock as 144MHz
* for PLLP base 216MHz and 204MHz for PLLP base 408MHz
*/
src = CLK_DIVIDER(NVBL_PLLP_KHZ, CSITE_KHZ);
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);
if (get_num_cpus() == 4) {
writel(rst, CSITE_CPU_DBG2_LAR);
writel(rst, CSITE_CPU_DBG3_LAR);
}
}
}
void halt_avp(void)
{
debug("%s entry\n", __func__);
for (;;) {
writel(HALT_COP_EVENT_JTAG | (FLOW_MODE_STOP << 29),
FLOW_CTLR_HALT_COP_EVENTS);
}
}
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