diff options
Diffstat (limited to 'arch/arm/mach-uniphier/ph1-sld8/pll_init.c')
| -rw-r--r-- | arch/arm/mach-uniphier/ph1-sld8/pll_init.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/ph1-sld8/pll_init.c b/arch/arm/mach-uniphier/ph1-sld8/pll_init.c new file mode 100644 index 0000000000..4b82700f44 --- /dev/null +++ b/arch/arm/mach-uniphier/ph1-sld8/pll_init.c @@ -0,0 +1,201 @@ +/* + * Copyright (C) 2011-2014 Panasonic Corporation + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/sc-regs.h> +#include <asm/arch/sg-regs.h> + +static void dpll_init(void) +{ + u32 tmp; + /* + * Set DPLL SSC parameters for DPLLCTRL3 + * [23] DIVN_TEST 0x1 + * [22:16] DIVN 0x50 + * [10] FREFSEL_TEST 0x1 + * [9:8] FREFSEL 0x2 + * [4] ICPD_TEST 0x1 + * [3:0] ICPD 0xb + */ + tmp = readl(SC_DPLLCTRL3); + tmp &= ~0x00ff0717; + tmp |= 0x00d0061b; + writel(tmp, SC_DPLLCTRL3); + + /* + * Set DPLL SSC parameters for DPLLCTRL + * <-1%> <-2%> + * [29:20] SSC_UPCNT 132 (0x084) 132 (0x084) + * [14:0] SSC_dK 6335(0x18bf) 12710(0x31a6) + */ + tmp = readl(SC_DPLLCTRL); + tmp &= ~0x3ff07fff; +#ifdef CONFIG_DPLL_SSC_RATE_1PER + tmp |= 0x084018bf; +#else + tmp |= 0x084031a6; +#endif + writel(tmp, SC_DPLLCTRL); + + /* + * Set DPLL SSC parameters for DPLLCTRL2 + * [31:29] SSC_STEP 0 + * [27] SSC_REG_REF 1 + * [26:20] SSC_M 79 (0x4f) + * [19:0] SSC_K 964689 (0xeb851) + */ + tmp = readl(SC_DPLLCTRL2); + tmp &= ~0xefffffff; + tmp |= 0x0cfeb851; + writel(tmp, SC_DPLLCTRL2); +} + +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); +} + +void pll_init(void) +{ + dpll_init(); + 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); +} |