mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
1b245fee91
This provides SPL support for T30 boards - AVP early init, plus CPU (A9) init/jump to main U-Boot. Some changes were made to Tegra20 cpu.c to move common routines into tegra-common/cpu.c and reduce code duplication. Signed-off-by: Tom Warren <twarren@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
335 lines
8.6 KiB
C
335 lines
8.6 KiB
C
/*
|
|
* 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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#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"
|
|
|
|
enum tegra_family_t {
|
|
TEGRA_FAMILY_T2x,
|
|
TEGRA_FAMILY_T3x,
|
|
};
|
|
|
|
|
|
enum tegra_family_t get_family(void)
|
|
{
|
|
u32 reg, chip_id;
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
{{ 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: 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 */
|
|
},
|
|
};
|
|
|
|
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]);
|
|
}
|
|
|
|
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(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 chip_type;
|
|
enum clock_osc_freq osc;
|
|
struct clk_pll_table *sel;
|
|
|
|
debug("init_pllx entry\n");
|
|
|
|
/* get chip type */
|
|
chip_type = tegra_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);
|
|
|
|
/* adjust PLLP_out1-4 on T30 */
|
|
if (chip_type == TEGRA_SOC_T30) {
|
|
debug(" init_pllx: adjusting PLLP out freqs\n");
|
|
adjust_pllp_out_freqs();
|
|
}
|
|
}
|
|
|
|
void enable_cpu_clock(int enable)
|
|
{
|
|
struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
|
|
u32 clk;
|
|
|
|
/*
|
|
* 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 defined(CONFIG_TEGRA30)
|
|
clk |= 1 << CPU2_CLK_STP_SHIFT;
|
|
clk |= 1 << CPU3_CLK_STP_SHIFT;
|
|
#endif
|
|
/* 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;
|
|
|
|
/* 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;
|
|
|
|
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("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);
|
|
}
|
|
|
|
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 (tegra_get_chip_type() == TEGRA_SOC_T30)
|
|
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);
|
|
#if defined(CONFIG_TEGRA30)
|
|
writel(rst, CSITE_CPU_DBG2_LAR);
|
|
writel(rst, CSITE_CPU_DBG3_LAR);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void halt_avp(void)
|
|
{
|
|
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);
|
|
}
|
|
}
|