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/*
* Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/err.h>
#include <linux/io.h>
#include "../init.h"
#include "../sc-regs.h"
#include "../sg-regs.h"
#undef DPLL_SSC_RATE_1PER
static int dpll_init(unsigned int dram_freq)
{
u32 tmp;
/*
* Set Frequency
* Set 0xc(1600MHz)/0xd(1333MHz)/0xe(1066MHz)
* to FOUT (DPLLCTRL.bit[29:20])
*/
tmp = readl(SC_DPLLCTRL);
tmp &= ~0x000f0000;
switch (dram_freq) {
case 1333:
tmp |= 0x000d0000;
break;
case 1600:
tmp |= 0x000c0000;
break;
default:
pr_err("Unsupported frequency");
return -EINVAL;
}
#if defined(DPLL_SSC_RATE_1PER)
tmp &= ~SC_DPLLCTRL_SSC_RATE;
#else
tmp |= SC_DPLLCTRL_SSC_RATE;
#endif
writel(tmp, SC_DPLLCTRL);
tmp = readl(SC_DPLLCTRL2);
tmp |= SC_DPLLCTRL2_NRSTDS;
writel(tmp, SC_DPLLCTRL2);
return 0;
}
static void upll_init(void)
{
u32 tmp, clk_mode_upll, clk_mode_axosel;
tmp = readl(SG_PINMON0);
clk_mode_upll = tmp & SG_PINMON0_CLK_MODE_UPLLSRC_MASK;
clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
/* set 0 to SNRT(UPLLCTRL.bit28) and K_LD(UPLLCTRL.bit[27]) */
tmp = readl(SC_UPLLCTRL);
tmp &= ~0x18000000;
writel(tmp, SC_UPLLCTRL);
if (clk_mode_upll == SG_PINMON0_CLK_MODE_UPLLSRC_DEFAULT) {
if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
/* AXO: 25MHz */
tmp &= ~0x07ffffff;
tmp |= 0x0228f5c0;
} else {
/* AXO: default 24.576MHz */
tmp &= ~0x07ffffff;
tmp |= 0x02328000;
}
}
writel(tmp, SC_UPLLCTRL);
/* set 1 to K_LD(UPLLCTRL.bit[27]) */
tmp |= 0x08000000;
writel(tmp, SC_UPLLCTRL);
/* wait 10 usec */
udelay(10);
/* set 1 to SNRT(UPLLCTRL.bit[28]) */
tmp |= 0x10000000;
writel(tmp, SC_UPLLCTRL);
}
static void vpll_init(void)
{
u32 tmp, clk_mode_axosel;
tmp = readl(SG_PINMON0);
clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
/* set 1 to VPLA27WP and VPLA27WP */
tmp = readl(SC_VPLL27ACTRL);
tmp |= 0x00000001;
writel(tmp, SC_VPLL27ACTRL);
tmp = readl(SC_VPLL27BCTRL);
tmp |= 0x00000001;
writel(tmp, SC_VPLL27BCTRL);
/* Set 0 to VPLA_K_LD and VPLB_K_LD */
tmp = readl(SC_VPLL27ACTRL3);
tmp &= ~0x10000000;
writel(tmp, SC_VPLL27ACTRL3);
tmp = readl(SC_VPLL27BCTRL3);
tmp &= ~0x10000000;
writel(tmp, SC_VPLL27BCTRL3);
/* Set 0 to VPLA_SNRST and VPLB_SNRST */
tmp = readl(SC_VPLL27ACTRL2);
tmp &= ~0x10000000;
writel(tmp, SC_VPLL27ACTRL2);
tmp = readl(SC_VPLL27BCTRL2);
tmp &= ~0x10000000;
writel(tmp, SC_VPLL27BCTRL2);
/* Set 0x20 to VPLA_SNRST and VPLB_SNRST */
tmp = readl(SC_VPLL27ACTRL2);
tmp &= ~0x0000007f;
tmp |= 0x00000020;
writel(tmp, SC_VPLL27ACTRL2);
tmp = readl(SC_VPLL27BCTRL2);
tmp &= ~0x0000007f;
tmp |= 0x00000020;
writel(tmp, SC_VPLL27BCTRL2);
if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
/* AXO: 25MHz */
tmp = readl(SC_VPLL27ACTRL3);
tmp &= ~0x000fffff;
tmp |= 0x00066664;
writel(tmp, SC_VPLL27ACTRL3);
tmp = readl(SC_VPLL27BCTRL3);
tmp &= ~0x000fffff;
tmp |= 0x00066664;
writel(tmp, SC_VPLL27BCTRL3);
} else {
/* AXO: default 24.576MHz */
tmp = readl(SC_VPLL27ACTRL3);
tmp &= ~0x000fffff;
tmp |= 0x000f5800;
writel(tmp, SC_VPLL27ACTRL3);
tmp = readl(SC_VPLL27BCTRL3);
tmp &= ~0x000fffff;
tmp |= 0x000f5800;
writel(tmp, SC_VPLL27BCTRL3);
}
/* Set 1 to VPLA_K_LD and VPLB_K_LD */
tmp = readl(SC_VPLL27ACTRL3);
tmp |= 0x10000000;
writel(tmp, SC_VPLL27ACTRL3);
tmp = readl(SC_VPLL27BCTRL3);
tmp |= 0x10000000;
writel(tmp, SC_VPLL27BCTRL3);
/* wait 10 usec */
udelay(10);
/* Set 0 to VPLA_SNRST and VPLB_SNRST */
tmp = readl(SC_VPLL27ACTRL2);
tmp |= 0x10000000;
writel(tmp, SC_VPLL27ACTRL2);
tmp = readl(SC_VPLL27BCTRL2);
tmp |= 0x10000000;
writel(tmp, SC_VPLL27BCTRL2);
/* set 0 to VPLA27WP and VPLA27WP */
tmp = readl(SC_VPLL27ACTRL);
tmp &= ~0x00000001;
writel(tmp, SC_VPLL27ACTRL);
tmp = readl(SC_VPLL27BCTRL);
tmp |= ~0x00000001;
writel(tmp, SC_VPLL27BCTRL);
}
int ph1_ld4_pll_init(const struct uniphier_board_data *bd)
{
int ret;
ret = dpll_init(bd->dram_freq);
if (ret)
return ret;
upll_init();
vpll_init();
/*
* Wait 500 usec until dpll get stable
* We wait 10 usec in upll_init() and vpll_init()
* so 20 usec can be saved here.
*/
udelay(480);
return 0;
}
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