/* * arch/sh/kernel/cpu/sh4a/clock-sh7366.c * * SH7366 clock framework support * * Copyright (C) 2009 Magnus Damm * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License * * This program is distributed in the hope that 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include /* SH7366 registers */ #define FRQCR 0xa4150000 #define VCLKCR 0xa4150004 #define SCLKACR 0xa4150008 #define SCLKBCR 0xa415000c #define PLLCR 0xa4150024 #define MSTPCR0 0xa4150030 #define MSTPCR1 0xa4150034 #define MSTPCR2 0xa4150038 #define DLLFRQ 0xa4150050 /* Fixed 32 KHz root clock for RTC and Power Management purposes */ static struct clk r_clk = { .name = "rclk", .id = -1, .rate = 32768, }; /* * Default rate for the root input clock, reset this with clk_set_rate() * from the platform code. */ struct clk extal_clk = { .name = "extal", .id = -1, .rate = 33333333, }; /* The dll block multiplies the 32khz r_clk, may be used instead of extal */ static unsigned long dll_recalc(struct clk *clk) { unsigned long mult; if (__raw_readl(PLLCR) & 0x1000) mult = __raw_readl(DLLFRQ); else mult = 0; return clk->parent->rate * mult; } static struct clk_ops dll_clk_ops = { .recalc = dll_recalc, }; static struct clk dll_clk = { .name = "dll_clk", .id = -1, .ops = &dll_clk_ops, .parent = &r_clk, .flags = CLK_ENABLE_ON_INIT, }; static unsigned long pll_recalc(struct clk *clk) { unsigned long mult = 1; unsigned long div = 1; if (__raw_readl(PLLCR) & 0x4000) mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1); else div = 2; return (clk->parent->rate * mult) / div; } static struct clk_ops pll_clk_ops = { .recalc = pll_recalc, }; static struct clk pll_clk = { .name = "pll_clk", .id = -1, .ops = &pll_clk_ops, .flags = CLK_ENABLE_ON_INIT, }; struct clk *main_clks[] = { &r_clk, &extal_clk, &dll_clk, &pll_clk, }; static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 }; static struct clk_div_mult_table div4_div_mult_table = { .divisors = divisors, .nr_divisors = ARRAY_SIZE(divisors), .multipliers = multipliers, .nr_multipliers = ARRAY_SIZE(multipliers), }; static struct clk_div4_table div4_table = { .div_mult_table = &div4_div_mult_table, }; enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, DIV4_SIUA, DIV4_SIUB, DIV4_NR }; #define DIV4(_str, _reg, _bit, _mask, _flags) \ SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags) struct clk div4_clks[DIV4_NR] = { [DIV4_I] = DIV4("cpu_clk", FRQCR, 20, 0x1fef, CLK_ENABLE_ON_INIT), [DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT), [DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT), [DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT), [DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT), [DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x1fff, 0), [DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x1fff, 0), [DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x1fff, 0), }; struct clk div6_clks[] = { SH_CLK_DIV6("video_clk", &pll_clk, VCLKCR, 0), }; #define MSTP(_str, _parent, _reg, _bit, _flags) \ SH_CLK_MSTP32(_str, -1, _parent, _reg, _bit, _flags) static struct clk mstp_clks[] = { /* See page 52 of Datasheet V0.40: Overview -> Block Diagram */ MSTP("tlb0", &div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT), MSTP("ic0", &div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT), MSTP("oc0", &div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT), MSTP("rsmem0", &div4_clks[DIV4_SH], MSTPCR0, 28, CLK_ENABLE_ON_INIT), MSTP("xymem0", &div4_clks[DIV4_B], MSTPCR0, 26, CLK_ENABLE_ON_INIT), MSTP("intc3", &div4_clks[DIV4_P], MSTPCR0, 23, 0), MSTP("intc0", &div4_clks[DIV4_P], MSTPCR0, 22, 0), MSTP("dmac0", &div4_clks[DIV4_P], MSTPCR0, 21, 0), MSTP("sh0", &div4_clks[DIV4_P], MSTPCR0, 20, 0), MSTP("hudi0", &div4_clks[DIV4_P], MSTPCR0, 19, 0), MSTP("ubc0", &div4_clks[DIV4_P], MSTPCR0, 17, 0), MSTP("tmu_fck", &div4_clks[DIV4_P], MSTPCR0, 15, 0), MSTP("cmt_fck", &r_clk, MSTPCR0, 14, 0), MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0), MSTP("mfi0", &div4_clks[DIV4_P], MSTPCR0, 11, 0), MSTP("flctl0", &div4_clks[DIV4_P], MSTPCR0, 10, 0), SH_CLK_MSTP32("sci_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 7, 0), SH_CLK_MSTP32("sci_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 6, 0), SH_CLK_MSTP32("sci_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 5, 0), MSTP("msiof0", &div4_clks[DIV4_P], MSTPCR0, 2, 0), MSTP("sbr0", &div4_clks[DIV4_P], MSTPCR0, 1, 0), MSTP("i2c0", &div4_clks[DIV4_P], MSTPCR1, 9, 0), MSTP("icb0", &div4_clks[DIV4_P], MSTPCR2, 27, 0), MSTP("meram0", &div4_clks[DIV4_P], MSTPCR2, 26, 0), MSTP("dacy1", &div4_clks[DIV4_P], MSTPCR2, 24, 0), MSTP("dacy0", &div4_clks[DIV4_P], MSTPCR2, 23, 0), MSTP("tsif0", &div4_clks[DIV4_P], MSTPCR2, 22, 0), MSTP("sdhi0", &div4_clks[DIV4_P], MSTPCR2, 18, 0), MSTP("mmcif0", &div4_clks[DIV4_P], MSTPCR2, 17, 0), MSTP("usbf0", &div4_clks[DIV4_P], MSTPCR2, 11, 0), MSTP("siu0", &div4_clks[DIV4_B], MSTPCR2, 9, 0), MSTP("veu1", &div4_clks[DIV4_B], MSTPCR2, 7, CLK_ENABLE_ON_INIT), MSTP("vou0", &div4_clks[DIV4_B], MSTPCR2, 5, 0), MSTP("beu0", &div4_clks[DIV4_B], MSTPCR2, 4, 0), MSTP("ceu0", &div4_clks[DIV4_B], MSTPCR2, 3, 0), MSTP("veu0", &div4_clks[DIV4_B], MSTPCR2, 2, CLK_ENABLE_ON_INIT), MSTP("vpu0", &div4_clks[DIV4_B], MSTPCR2, 1, CLK_ENABLE_ON_INIT), MSTP("lcdc0", &div4_clks[DIV4_B], MSTPCR2, 0, 0), }; int __init arch_clk_init(void) { int k, ret = 0; /* autodetect extal or dll configuration */ if (__raw_readl(PLLCR) & 0x1000) pll_clk.parent = &dll_clk; else pll_clk.parent = &extal_clk; for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) ret = clk_register(main_clks[k]); if (!ret) ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); if (!ret) ret = sh_clk_div6_register(div6_clks, ARRAY_SIZE(div6_clks)); if (!ret) ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks)); return ret; }