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https://github.com/AsahiLinux/u-boot
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739ba41d5a
The SC_* macros represent the address of SysCtrl registers. For a planned new SoC, its base address will be changed. Turn the SC_* macros into the offset from the base address. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2013-2014 Panasonic Corporation
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* Copyright (C) 2015-2016 Socionext Inc.
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*/
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#include <linux/delay.h>
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#include <linux/io.h>
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#include "../init.h"
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#include "../sc-regs.h"
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#include "../sg-regs.h"
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#include "pll.h"
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static void upll_init(void)
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{
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u32 tmp, clk_mode_upll, clk_mode_axosel;
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tmp = readl(sg_base + SG_PINMON0);
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clk_mode_upll = tmp & SG_PINMON0_CLK_MODE_UPLLSRC_MASK;
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clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
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/* set 0 to SNRT(UPLLCTRL.bit28) and K_LD(UPLLCTRL.bit[27]) */
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tmp = readl(sc_base + SC_UPLLCTRL);
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tmp &= ~0x18000000;
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writel(tmp, sc_base + SC_UPLLCTRL);
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if (clk_mode_upll == SG_PINMON0_CLK_MODE_UPLLSRC_DEFAULT) {
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if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
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clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
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/* AXO: 25MHz */
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tmp &= ~0x07ffffff;
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tmp |= 0x0228f5c0;
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} else {
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/* AXO: default 24.576MHz */
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tmp &= ~0x07ffffff;
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tmp |= 0x02328000;
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}
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}
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writel(tmp, sc_base + SC_UPLLCTRL);
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/* set 1 to K_LD(UPLLCTRL.bit[27]) */
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tmp |= 0x08000000;
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writel(tmp, sc_base + SC_UPLLCTRL);
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/* wait 10 usec */
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udelay(10);
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/* set 1 to SNRT(UPLLCTRL.bit[28]) */
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tmp |= 0x10000000;
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writel(tmp, sc_base + SC_UPLLCTRL);
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}
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static void vpll_init(void)
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{
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u32 tmp, clk_mode_axosel;
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tmp = readl(sg_base + SG_PINMON0);
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clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
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/* set 1 to VPLA27WP and VPLA27WP */
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tmp = readl(sc_base + SC_VPLL27ACTRL);
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tmp |= 0x00000001;
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writel(tmp, sc_base + SC_VPLL27ACTRL);
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tmp = readl(sc_base + SC_VPLL27BCTRL);
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tmp |= 0x00000001;
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writel(tmp, sc_base + SC_VPLL27BCTRL);
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/* Set 0 to VPLA_K_LD and VPLB_K_LD */
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tmp = readl(sc_base + SC_VPLL27ACTRL3);
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tmp &= ~0x10000000;
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writel(tmp, sc_base + SC_VPLL27ACTRL3);
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tmp = readl(sc_base + SC_VPLL27BCTRL3);
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tmp &= ~0x10000000;
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writel(tmp, sc_base + SC_VPLL27BCTRL3);
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/* Set 0 to VPLA_SNRST and VPLB_SNRST */
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tmp = readl(sc_base + SC_VPLL27ACTRL2);
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tmp &= ~0x10000000;
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writel(tmp, sc_base + SC_VPLL27ACTRL2);
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tmp = readl(sc_base + SC_VPLL27BCTRL2);
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tmp &= ~0x10000000;
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writel(tmp, sc_base + SC_VPLL27BCTRL2);
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/* Set 0x20 to VPLA_SNRST and VPLB_SNRST */
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tmp = readl(sc_base + SC_VPLL27ACTRL2);
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tmp &= ~0x0000007f;
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tmp |= 0x00000020;
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writel(tmp, sc_base + SC_VPLL27ACTRL2);
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tmp = readl(sc_base + SC_VPLL27BCTRL2);
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tmp &= ~0x0000007f;
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tmp |= 0x00000020;
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writel(tmp, sc_base + SC_VPLL27BCTRL2);
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if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
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clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
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/* AXO: 25MHz */
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tmp = readl(sc_base + SC_VPLL27ACTRL3);
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tmp &= ~0x000fffff;
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tmp |= 0x00066664;
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writel(tmp, sc_base + SC_VPLL27ACTRL3);
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tmp = readl(sc_base + SC_VPLL27BCTRL3);
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tmp &= ~0x000fffff;
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tmp |= 0x00066664;
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writel(tmp, sc_base + SC_VPLL27BCTRL3);
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} else {
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/* AXO: default 24.576MHz */
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tmp = readl(sc_base + SC_VPLL27ACTRL3);
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tmp &= ~0x000fffff;
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tmp |= 0x000f5800;
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writel(tmp, sc_base + SC_VPLL27ACTRL3);
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tmp = readl(sc_base + SC_VPLL27BCTRL3);
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tmp &= ~0x000fffff;
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tmp |= 0x000f5800;
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writel(tmp, sc_base + SC_VPLL27BCTRL3);
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}
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/* Set 1 to VPLA_K_LD and VPLB_K_LD */
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tmp = readl(sc_base + SC_VPLL27ACTRL3);
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tmp |= 0x10000000;
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writel(tmp, sc_base + SC_VPLL27ACTRL3);
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tmp = readl(sc_base + SC_VPLL27BCTRL3);
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tmp |= 0x10000000;
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writel(tmp, sc_base + SC_VPLL27BCTRL3);
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/* wait 10 usec */
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udelay(10);
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/* Set 0 to VPLA_SNRST and VPLB_SNRST */
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tmp = readl(sc_base + SC_VPLL27ACTRL2);
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tmp |= 0x10000000;
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writel(tmp, sc_base + SC_VPLL27ACTRL2);
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tmp = readl(sc_base + SC_VPLL27BCTRL2);
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tmp |= 0x10000000;
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writel(tmp, sc_base + SC_VPLL27BCTRL2);
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/* set 0 to VPLA27WP and VPLA27WP */
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tmp = readl(sc_base + SC_VPLL27ACTRL);
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tmp &= ~0x00000001;
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writel(tmp, sc_base + SC_VPLL27ACTRL);
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tmp = readl(sc_base + SC_VPLL27BCTRL);
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tmp |= ~0x00000001;
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writel(tmp, sc_base + SC_VPLL27BCTRL);
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}
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void uniphier_ld4_pll_init(void)
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{
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upll_init();
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vpll_init();
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uniphier_ld4_dpll_ssc_en();
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}
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