/* * arch/sh/kernel/cpu/sh4a/clock-sh7724.c * * SH7724 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 #include #include /* SH7724 registers */ #define FRQCRA 0xa4150000 #define FRQCRB 0xa4150004 #define VCLKCR 0xa4150048 #define FCLKACR 0xa4150008 #define FCLKBCR 0xa415000c #define IRDACLKCR 0xa4150018 #define PLLCR 0xa4150024 #define SPUCLKCR 0xa415003c #define FLLFRQ 0xa4150050 #define LSTATS 0xa4150060 /* 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 fll multiplies the 32khz r_clk, may be used instead of extal */ static unsigned long fll_recalc(struct clk *clk) { unsigned long mult = 0; unsigned long div = 1; if (__raw_readl(PLLCR) & 0x1000) mult = __raw_readl(FLLFRQ) & 0x3ff; if (__raw_readl(FLLFRQ) & 0x4000) div = 2; return (clk->parent->rate * mult) / div; } static struct clk_ops fll_clk_ops = { .recalc = fll_recalc, }; static struct clk fll_clk = { .name = "fll_clk", .id = -1, .ops = &fll_clk_ops, .parent = &r_clk, .flags = CLK_ENABLE_ON_INIT, }; static unsigned long pll_recalc(struct clk *clk) { unsigned long mult = 1; if (__raw_readl(PLLCR) & 0x4000) mult = (((__raw_readl(FRQCRA) >> 24) & 0x3f) + 1) * 2; return clk->parent->rate * mult; } 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, }; /* A fixed divide-by-3 block use by the div6 clocks */ static unsigned long div3_recalc(struct clk *clk) { return clk->parent->rate / 3; } static struct clk_ops div3_clk_ops = { .recalc = div3_recalc, }; static struct clk div3_clk = { .name = "div3_clk", .id = -1, .ops = &div3_clk_ops, .parent = &pll_clk, }; struct clk *main_clks[] = { &r_clk, &extal_clk, &fll_clk, &pll_clk, &div3_clk, }; static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 0, 24, 32, 36, 48, 0, 72 }; static struct clk_div_mult_table div4_table = { .divisors = divisors, .nr_divisors = ARRAY_SIZE(divisors), }; enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_P, DIV4_M1, 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", FRQCRA, 20, 0x2f7d, CLK_ENABLE_ON_INIT), [DIV4_SH] = DIV4("shyway_clk", FRQCRA, 12, 0x2f7c, CLK_ENABLE_ON_INIT), [DIV4_B] = DIV4("bus_clk", FRQCRA, 8, 0x2f7c, CLK_ENABLE_ON_INIT), [DIV4_P] = DIV4("peripheral_clk", FRQCRA, 0, 0x2f7c, 0), [DIV4_M1] = DIV4("vpu_clk", FRQCRB, 4, 0x2f7c, 0), }; struct clk div6_clks[] = { SH_CLK_DIV6("video_clk", &div3_clk, VCLKCR, 0), SH_CLK_DIV6("fsia_clk", &div3_clk, FCLKACR, 0), SH_CLK_DIV6("fsib_clk", &div3_clk, FCLKBCR, 0), SH_CLK_DIV6("irda_clk", &div3_clk, IRDACLKCR, 0), SH_CLK_DIV6("spu_clk", &div3_clk, SPUCLKCR, 0), }; #define R_CLK (&r_clk) #define P_CLK (&div4_clks[DIV4_P]) #define B_CLK (&div4_clks[DIV4_B]) #define I_CLK (&div4_clks[DIV4_I]) #define SH_CLK (&div4_clks[DIV4_SH]) static struct clk mstp_clks[] = { SH_HWBLK_CLK("tlb0", -1, I_CLK, HWBLK_TLB, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("ic0", -1, I_CLK, HWBLK_IC, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("oc0", -1, I_CLK, HWBLK_OC, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("rs0", -1, B_CLK, HWBLK_RSMEM, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("ilmem0", -1, I_CLK, HWBLK_ILMEM, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("l2c0", -1, SH_CLK, HWBLK_L2C, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("fpu0", -1, I_CLK, HWBLK_FPU, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("intc0", -1, P_CLK, HWBLK_INTC, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("dmac0", -1, B_CLK, HWBLK_DMAC0, 0), SH_HWBLK_CLK("sh0", -1, SH_CLK, HWBLK_SHYWAY, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("hudi0", -1, P_CLK, HWBLK_HUDI, 0), SH_HWBLK_CLK("ubc0", -1, I_CLK, HWBLK_UBC, 0), SH_HWBLK_CLK("tmu0", -1, P_CLK, HWBLK_TMU0, 0), SH_HWBLK_CLK("cmt0", -1, R_CLK, HWBLK_CMT, 0), SH_HWBLK_CLK("rwdt0", -1, R_CLK, HWBLK_RWDT, 0), SH_HWBLK_CLK("dmac1", -1, B_CLK, HWBLK_DMAC1, 0), SH_HWBLK_CLK("tmu1", -1, P_CLK, HWBLK_TMU1, 0), SH_HWBLK_CLK("scif0", -1, P_CLK, HWBLK_SCIF0, 0), SH_HWBLK_CLK("scif1", -1, P_CLK, HWBLK_SCIF1, 0), SH_HWBLK_CLK("scif2", -1, P_CLK, HWBLK_SCIF2, 0), SH_HWBLK_CLK("scif3", -1, B_CLK, HWBLK_SCIF3, 0), SH_HWBLK_CLK("scif4", -1, B_CLK, HWBLK_SCIF4, 0), SH_HWBLK_CLK("scif5", -1, B_CLK, HWBLK_SCIF5, 0), SH_HWBLK_CLK("msiof0", -1, B_CLK, HWBLK_MSIOF0, 0), SH_HWBLK_CLK("msiof1", -1, B_CLK, HWBLK_MSIOF1, 0), SH_HWBLK_CLK("keysc0", -1, R_CLK, HWBLK_KEYSC, 0), SH_HWBLK_CLK("rtc0", -1, R_CLK, HWBLK_RTC, 0), SH_HWBLK_CLK("i2c0", -1, P_CLK, HWBLK_IIC0, 0), SH_HWBLK_CLK("i2c1", -1, P_CLK, HWBLK_IIC1, 0), SH_HWBLK_CLK("mmc0", -1, B_CLK, HWBLK_MMC, 0), SH_HWBLK_CLK("eth0", -1, B_CLK, HWBLK_ETHER, 0), SH_HWBLK_CLK("atapi0", -1, B_CLK, HWBLK_ATAPI, 0), SH_HWBLK_CLK("tpu0", -1, B_CLK, HWBLK_TPU, 0), SH_HWBLK_CLK("irda0", -1, P_CLK, HWBLK_IRDA, 0), SH_HWBLK_CLK("tsif0", -1, B_CLK, HWBLK_TSIF, 0), SH_HWBLK_CLK("usb1", -1, B_CLK, HWBLK_USB1, 0), SH_HWBLK_CLK("usb0", -1, B_CLK, HWBLK_USB0, 0), SH_HWBLK_CLK("2dg0", -1, B_CLK, HWBLK_2DG, 0), SH_HWBLK_CLK("sdhi0", -1, B_CLK, HWBLK_SDHI0, 0), SH_HWBLK_CLK("sdhi1", -1, B_CLK, HWBLK_SDHI1, 0), SH_HWBLK_CLK("veu1", -1, B_CLK, HWBLK_VEU1, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("ceu1", -1, B_CLK, HWBLK_CEU1, 0), SH_HWBLK_CLK("beu1", -1, B_CLK, HWBLK_BEU1, 0), SH_HWBLK_CLK("2ddmac0", -1, SH_CLK, HWBLK_2DDMAC, 0), SH_HWBLK_CLK("spu0", -1, B_CLK, HWBLK_SPU, 0), SH_HWBLK_CLK("jpu0", -1, B_CLK, HWBLK_JPU, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("vou0", -1, B_CLK, HWBLK_VOU, 0), SH_HWBLK_CLK("beu0", -1, B_CLK, HWBLK_BEU0, 0), SH_HWBLK_CLK("ceu0", -1, B_CLK, HWBLK_CEU0, 0), SH_HWBLK_CLK("veu0", -1, B_CLK, HWBLK_VEU0, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("vpu0", -1, B_CLK, HWBLK_VPU, CLK_ENABLE_ON_INIT), SH_HWBLK_CLK("lcdc0", -1, B_CLK, HWBLK_LCDC, 0), }; int __init arch_clk_init(void) { int k, ret = 0; /* autodetect extal or fll configuration */ if (__raw_readl(PLLCR) & 0x1000) pll_clk.parent = &fll_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_hwblk_clk_register(mstp_clks, ARRAY_SIZE(mstp_clks)); return ret; }