/* * arch/sh/kernel/cpu/sh4a/clock-sh7723.c * * SH7723 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 <linux/init.h> #include <linux/kernel.h> #include <linux/io.h> #include <linux/clk.h> #include <linux/clkdev.h> #include <linux/sh_clk.h> #include <asm/clock.h> #include <cpu/sh7723.h> /* SH7723 registers */ #define FRQCR 0xa4150000 #define VCLKCR 0xa4150004 #define SCLKACR 0xa4150008 #define SCLKBCR 0xa415000c #define IRDACLKCR 0xa4150018 #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 = { .rate = 32768, }; /* * Default rate for the root input clock, reset this with clk_set_rate() * from the platform code. */ struct clk extal_clk = { .rate = 33333333, }; /* The dll 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 sh_clk_ops dll_clk_ops = { .recalc = dll_recalc, }; static struct clk dll_clk = { .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 sh_clk_ops pll_clk_ops = { .recalc = pll_recalc, }; static struct clk pll_clk = { .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_NR }; #define DIV4(_reg, _bit, _mask, _flags) \ SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags) struct clk div4_clks[DIV4_NR] = { [DIV4_I] = DIV4(FRQCR, 20, 0x0dbf, CLK_ENABLE_ON_INIT), [DIV4_U] = DIV4(FRQCR, 16, 0x0dbf, CLK_ENABLE_ON_INIT), [DIV4_SH] = DIV4(FRQCR, 12, 0x0dbf, CLK_ENABLE_ON_INIT), [DIV4_B] = DIV4(FRQCR, 8, 0x0dbf, CLK_ENABLE_ON_INIT), [DIV4_B3] = DIV4(FRQCR, 4, 0x0db4, CLK_ENABLE_ON_INIT), [DIV4_P] = DIV4(FRQCR, 0, 0x0dbf, 0), }; enum { DIV4_IRDA, DIV4_ENABLE_NR }; struct clk div4_enable_clks[DIV4_ENABLE_NR] = { [DIV4_IRDA] = DIV4(IRDACLKCR, 0, 0x0dbf, 0), }; enum { DIV4_SIUA, DIV4_SIUB, DIV4_REPARENT_NR }; struct clk div4_reparent_clks[DIV4_REPARENT_NR] = { [DIV4_SIUA] = DIV4(SCLKACR, 0, 0x0dbf, 0), [DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x0dbf, 0), }; enum { DIV6_V, DIV6_NR }; struct clk div6_clks[DIV6_NR] = { [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0), }; static struct clk mstp_clks[] = { /* See page 60 of Datasheet V1.0: Overview -> Block Diagram */ [HWBLK_TLB] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT), [HWBLK_IC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT), [HWBLK_OC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT), [HWBLK_L2C] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 28, CLK_ENABLE_ON_INIT), [HWBLK_ILMEM] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 27, CLK_ENABLE_ON_INIT), [HWBLK_FPU] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 24, CLK_ENABLE_ON_INIT), [HWBLK_INTC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 22, CLK_ENABLE_ON_INIT), [HWBLK_DMAC0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 21, 0), [HWBLK_SHYWAY] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 20, CLK_ENABLE_ON_INIT), [HWBLK_HUDI] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 19, 0), [HWBLK_UBC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 17, 0), [HWBLK_TMU0] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0), [HWBLK_CMT] = SH_CLK_MSTP32(&r_clk, MSTPCR0, 14, 0), [HWBLK_RWDT] = SH_CLK_MSTP32(&r_clk, MSTPCR0, 13, 0), [HWBLK_DMAC1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 12, 0), [HWBLK_TMU1] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 11, 0), [HWBLK_FLCTL] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0), [HWBLK_SCIF0] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0), [HWBLK_SCIF1] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0), [HWBLK_SCIF2] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 7, 0), [HWBLK_SCIF3] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 6, 0), [HWBLK_SCIF4] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 5, 0), [HWBLK_SCIF5] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 4, 0), [HWBLK_MSIOF0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 2, 0), [HWBLK_MSIOF1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 1, 0), [HWBLK_MERAM] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 0, 0), [HWBLK_IIC] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 9, 0), [HWBLK_RTC] = SH_CLK_MSTP32(&r_clk, MSTPCR1, 8, 0), [HWBLK_ATAPI] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR2, 28, 0), [HWBLK_ADC] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR2, 27, 0), [HWBLK_TPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 25, 0), [HWBLK_IRDA] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR2, 24, 0), [HWBLK_TSIF] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 22, 0), [HWBLK_ICB] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 21, CLK_ENABLE_ON_INIT), [HWBLK_SDHI0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 18, 0), [HWBLK_SDHI1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 17, 0), [HWBLK_KEYSC] = SH_CLK_MSTP32(&r_clk, MSTPCR2, 14, 0), [HWBLK_USB] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 11, 0), [HWBLK_2DG] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 10, 0), [HWBLK_SIU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 8, 0), [HWBLK_VEU2H1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 6, 0), [HWBLK_VOU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 5, 0), [HWBLK_BEU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 4, 0), [HWBLK_CEU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 3, 0), [HWBLK_VEU2H0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 2, 0), [HWBLK_VPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 1, 0), [HWBLK_LCDC] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 0, 0), }; static struct clk_lookup lookups[] = { /* main clocks */ CLKDEV_CON_ID("rclk", &r_clk), CLKDEV_CON_ID("extal", &extal_clk), CLKDEV_CON_ID("dll_clk", &dll_clk), CLKDEV_CON_ID("pll_clk", &pll_clk), /* DIV4 clocks */ CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]), CLKDEV_CON_ID("umem_clk", &div4_clks[DIV4_U]), CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]), CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]), CLKDEV_CON_ID("b3_clk", &div4_clks[DIV4_B3]), CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]), CLKDEV_CON_ID("irda_clk", &div4_enable_clks[DIV4_IRDA]), CLKDEV_CON_ID("siua_clk", &div4_reparent_clks[DIV4_SIUA]), CLKDEV_CON_ID("siub_clk", &div4_reparent_clks[DIV4_SIUB]), /* DIV6 clocks */ CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]), /* MSTP clocks */ CLKDEV_CON_ID("tlb0", &mstp_clks[HWBLK_TLB]), CLKDEV_CON_ID("ic0", &mstp_clks[HWBLK_IC]), CLKDEV_CON_ID("oc0", &mstp_clks[HWBLK_OC]), CLKDEV_CON_ID("l2c0", &mstp_clks[HWBLK_L2C]), CLKDEV_CON_ID("ilmem0", &mstp_clks[HWBLK_ILMEM]), CLKDEV_CON_ID("fpu0", &mstp_clks[HWBLK_FPU]), CLKDEV_CON_ID("intc0", &mstp_clks[HWBLK_INTC]), CLKDEV_DEV_ID("sh-dma-engine.0", &mstp_clks[HWBLK_DMAC0]), CLKDEV_CON_ID("sh0", &mstp_clks[HWBLK_SHYWAY]), CLKDEV_CON_ID("hudi0", &mstp_clks[HWBLK_HUDI]), CLKDEV_CON_ID("ubc0", &mstp_clks[HWBLK_UBC]), CLKDEV_ICK_ID("fck", "sh-cmt-32.0", &mstp_clks[HWBLK_CMT]), CLKDEV_DEV_ID("sh-wdt.0", &mstp_clks[HWBLK_RWDT]), CLKDEV_DEV_ID("sh-dma-engine.1", &mstp_clks[HWBLK_DMAC1]), CLKDEV_CON_ID("flctl0", &mstp_clks[HWBLK_FLCTL]), CLKDEV_DEV_ID("spi_sh_msiof.0", &mstp_clks[HWBLK_MSIOF0]), CLKDEV_DEV_ID("spi_sh_msiof.1", &mstp_clks[HWBLK_MSIOF1]), CLKDEV_DEV_ID("sh_mobile_meram.0", &mstp_clks[HWBLK_MERAM]), CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[HWBLK_IIC]), CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]), CLKDEV_CON_ID("atapi0", &mstp_clks[HWBLK_ATAPI]), CLKDEV_CON_ID("adc0", &mstp_clks[HWBLK_ADC]), CLKDEV_CON_ID("tpu0", &mstp_clks[HWBLK_TPU]), CLKDEV_CON_ID("irda0", &mstp_clks[HWBLK_IRDA]), CLKDEV_CON_ID("tsif0", &mstp_clks[HWBLK_TSIF]), CLKDEV_CON_ID("icb0", &mstp_clks[HWBLK_ICB]), CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[HWBLK_SDHI0]), CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[HWBLK_SDHI1]), CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[HWBLK_KEYSC]), CLKDEV_CON_ID("usb0", &mstp_clks[HWBLK_USB]), CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]), CLKDEV_DEV_ID("siu-pcm-audio", &mstp_clks[HWBLK_SIU]), CLKDEV_CON_ID("veu1", &mstp_clks[HWBLK_VEU2H1]), CLKDEV_DEV_ID("sh-vou.0", &mstp_clks[HWBLK_VOU]), CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU]), CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[HWBLK_CEU]), CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU2H0]), CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]), CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[HWBLK_TMU0]), CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[HWBLK_TMU1]), CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[HWBLK_SCIF0]), CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[HWBLK_SCIF1]), CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[HWBLK_SCIF2]), CLKDEV_ICK_ID("sci_fck", "sh-sci.3", &mstp_clks[HWBLK_SCIF3]), CLKDEV_ICK_ID("sci_fck", "sh-sci.4", &mstp_clks[HWBLK_SCIF4]), CLKDEV_ICK_ID("sci_fck", "sh-sci.5", &mstp_clks[HWBLK_SCIF5]), CLKDEV_DEV_ID("sh_mobile_lcdc_fb.0", &mstp_clks[HWBLK_LCDC]), }; 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]); clkdev_add_table(lookups, ARRAY_SIZE(lookups)); if (!ret) ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); if (!ret) ret = sh_clk_div4_enable_register(div4_enable_clks, DIV4_ENABLE_NR, &div4_table); if (!ret) ret = sh_clk_div4_reparent_register(div4_reparent_clks, DIV4_REPARENT_NR, &div4_table); if (!ret) ret = sh_clk_div6_register(div6_clks, DIV6_NR); if (!ret) ret = sh_clk_mstp_register(mstp_clks, HWBLK_NR); return ret; }