/* * 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 #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 void div4_kick(struct clk *clk) { unsigned long value; /* set KICK bit in FRQCRA to update hardware setting */ value = __raw_readl(FRQCRA); value |= (1 << 31); __raw_writel(value, FRQCRA); } static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 0, 24, 32, 36, 48, 0, 72 }; static struct clk_div_mult_table div4_div_mult_table = { .divisors = divisors, .nr_divisors = ARRAY_SIZE(divisors), }; static struct clk_div4_table div4_table = { .div_mult_table = &div4_div_mult_table, .kick = div4_kick, }; 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, CLK_ENABLE_ON_INIT), }; 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, CLK_ENABLE_ON_INIT), }; static struct clk mstp_clks[HWBLK_NR] = { SH_HWBLK_CLK(HWBLK_TLB, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_IC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_OC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_RSMEM, &div4_clks[DIV4_B], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_ILMEM, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_L2C, &div4_clks[DIV4_SH], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_FPU, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_INTC, &div4_clks[DIV4_P], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_DMAC0, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_SHYWAY, &div4_clks[DIV4_SH], CLK_ENABLE_ON_INIT), SH_HWBLK_CLK(HWBLK_HUDI, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_UBC, &div4_clks[DIV4_I], 0), SH_HWBLK_CLK(HWBLK_TMU0, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_CMT, &r_clk, 0), SH_HWBLK_CLK(HWBLK_RWDT, &r_clk, 0), SH_HWBLK_CLK(HWBLK_DMAC1, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_TMU1, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_SCIF0, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_SCIF1, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_SCIF2, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_SCIF3, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_SCIF4, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_SCIF5, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_MSIOF0, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_MSIOF1, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_KEYSC, &r_clk, 0), SH_HWBLK_CLK(HWBLK_RTC, &r_clk, 0), SH_HWBLK_CLK(HWBLK_IIC0, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_IIC1, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_MMC, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_ETHER, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_ATAPI, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_TPU, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_IRDA, &div4_clks[DIV4_P], 0), SH_HWBLK_CLK(HWBLK_TSIF, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_USB1, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_USB0, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_2DG, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_SDHI0, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_SDHI1, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_VEU1, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_CEU1, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_BEU1, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_2DDMAC, &div4_clks[DIV4_SH], 0), SH_HWBLK_CLK(HWBLK_SPU, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_JPU, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_VOU, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_BEU0, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_CEU0, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_VEU0, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_VPU, &div4_clks[DIV4_B], 0), SH_HWBLK_CLK(HWBLK_LCDC, &div4_clks[DIV4_B], 0), }; #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk } static struct clk_lookup lookups[] = { /* 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("rs0", &mstp_clks[HWBLK_RSMEM]), CLKDEV_CON_ID("ilmem0", &mstp_clks[HWBLK_ILMEM]), CLKDEV_CON_ID("l2c0", &mstp_clks[HWBLK_L2C]), CLKDEV_CON_ID("fpu0", &mstp_clks[HWBLK_FPU]), CLKDEV_CON_ID("intc0", &mstp_clks[HWBLK_INTC]), CLKDEV_CON_ID("dmac0", &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]), { /* TMU0 */ .dev_id = "sh_tmu.0", .con_id = "tmu_fck", .clk = &mstp_clks[HWBLK_TMU0], }, { /* TMU1 */ .dev_id = "sh_tmu.1", .con_id = "tmu_fck", .clk = &mstp_clks[HWBLK_TMU0], }, { /* TMU2 */ .dev_id = "sh_tmu.2", .con_id = "tmu_fck", .clk = &mstp_clks[HWBLK_TMU0], }, { /* TMU3 */ .dev_id = "sh_tmu.3", .con_id = "tmu_fck", .clk = &mstp_clks[HWBLK_TMU1], }, CLKDEV_CON_ID("cmt_fck", &mstp_clks[HWBLK_CMT]), CLKDEV_CON_ID("rwdt0", &mstp_clks[HWBLK_RWDT]), CLKDEV_CON_ID("dmac1", &mstp_clks[HWBLK_DMAC1]), { /* TMU4 */ .dev_id = "sh_tmu.4", .con_id = "tmu_fck", .clk = &mstp_clks[HWBLK_TMU1], }, { /* TMU5 */ .dev_id = "sh_tmu.5", .con_id = "tmu_fck", .clk = &mstp_clks[HWBLK_TMU1], }, { /* SCIF0 */ .dev_id = "sh-sci.0", .con_id = "sci_fck", .clk = &mstp_clks[HWBLK_SCIF0], }, { /* SCIF1 */ .dev_id = "sh-sci.1", .con_id = "sci_fck", .clk = &mstp_clks[HWBLK_SCIF1], }, { /* SCIF2 */ .dev_id = "sh-sci.2", .con_id = "sci_fck", .clk = &mstp_clks[HWBLK_SCIF2], }, { /* SCIF3 */ .dev_id = "sh-sci.3", .con_id = "sci_fck", .clk = &mstp_clks[HWBLK_SCIF3], }, { /* SCIF4 */ .dev_id = "sh-sci.4", .con_id = "sci_fck", .clk = &mstp_clks[HWBLK_SCIF4], }, { /* SCIF5 */ .dev_id = "sh-sci.5", .con_id = "sci_fck", .clk = &mstp_clks[HWBLK_SCIF5], }, CLKDEV_CON_ID("msiof0", &mstp_clks[HWBLK_MSIOF0]), CLKDEV_CON_ID("msiof1", &mstp_clks[HWBLK_MSIOF1]), CLKDEV_CON_ID("keysc0", &mstp_clks[HWBLK_KEYSC]), CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]), CLKDEV_CON_ID("i2c0", &mstp_clks[HWBLK_IIC0]), CLKDEV_CON_ID("i2c1", &mstp_clks[HWBLK_IIC1]), CLKDEV_CON_ID("mmc0", &mstp_clks[HWBLK_MMC]), CLKDEV_CON_ID("eth0", &mstp_clks[HWBLK_ETHER]), CLKDEV_CON_ID("atapi0", &mstp_clks[HWBLK_ATAPI]), 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("usb1", &mstp_clks[HWBLK_USB1]), CLKDEV_CON_ID("usb0", &mstp_clks[HWBLK_USB0]), CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]), CLKDEV_CON_ID("sdhi0", &mstp_clks[HWBLK_SDHI0]), CLKDEV_CON_ID("sdhi1", &mstp_clks[HWBLK_SDHI1]), CLKDEV_CON_ID("veu1", &mstp_clks[HWBLK_VEU1]), CLKDEV_CON_ID("ceu1", &mstp_clks[HWBLK_CEU1]), CLKDEV_CON_ID("beu1", &mstp_clks[HWBLK_BEU1]), CLKDEV_CON_ID("2ddmac0", &mstp_clks[HWBLK_2DDMAC]), CLKDEV_CON_ID("spu0", &mstp_clks[HWBLK_SPU]), CLKDEV_CON_ID("jpu0", &mstp_clks[HWBLK_JPU]), CLKDEV_CON_ID("vou0", &mstp_clks[HWBLK_VOU]), CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU0]), CLKDEV_CON_ID("ceu0", &mstp_clks[HWBLK_CEU0]), CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU0]), CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]), CLKDEV_CON_ID("lcdc0", &mstp_clks[HWBLK_LCDC]), }; 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]); 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_div6_register(div6_clks, ARRAY_SIZE(div6_clks)); if (!ret) ret = sh_hwblk_clk_register(mstp_clks, HWBLK_NR); return ret; }