| /* |
| * 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 <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/io.h> |
| #include <asm/clock.h> |
| |
| /* SH7724 registers */ |
| #define FRQCRA 0xa4150000 |
| #define FRQCRB 0xa4150004 |
| #define VCLKCR 0xa4150048 |
| #define FCLKACR 0xa4150008 |
| #define FCLKBCR 0xa415000c |
| #define IRDACLKCR 0xa4150018 |
| #define PLLCR 0xa4150024 |
| #define MSTPCR0 0xa4150030 |
| #define MSTPCR1 0xa4150034 |
| #define MSTPCR2 0xa4150038 |
| #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, 0, 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 MSTP(_str, _parent, _reg, _bit, _force_on, _need_cpg, _need_ram) \ |
| SH_CLK_MSTP32(_str, -1, _parent, _reg, _bit, _force_on * CLK_ENABLE_ON_INIT) |
| |
| static struct clk mstp_clks[] = { |
| MSTP("tlb0", &div4_clks[DIV4_I], MSTPCR0, 31, 1, 1, 0), |
| MSTP("ic0", &div4_clks[DIV4_I], MSTPCR0, 30, 1, 1, 0), |
| MSTP("oc0", &div4_clks[DIV4_I], MSTPCR0, 29, 1, 1, 0), |
| MSTP("rs0", &div4_clks[DIV4_B], MSTPCR0, 28, 1, 1, 0), |
| MSTP("ilmem0", &div4_clks[DIV4_I], MSTPCR0, 27, 1, 1, 0), |
| MSTP("l2c0", &div4_clks[DIV4_SH], MSTPCR0, 26, 1, 1, 0), |
| MSTP("fpu0", &div4_clks[DIV4_I], MSTPCR0, 24, 1, 1, 0), |
| MSTP("intc0", &div4_clks[DIV4_P], MSTPCR0, 22, 1, 1, 0), |
| MSTP("dmac0", &div4_clks[DIV4_B], MSTPCR0, 21, 0, 1, 1), |
| MSTP("sh0", &div4_clks[DIV4_SH], MSTPCR0, 20, 0, 1, 0), |
| MSTP("hudi0", &div4_clks[DIV4_P], MSTPCR0, 19, 0, 1, 0), |
| MSTP("ubc0", &div4_clks[DIV4_I], MSTPCR0, 17, 0, 1, 0), |
| MSTP("tmu0", &div4_clks[DIV4_P], MSTPCR0, 15, 0, 1, 0), |
| MSTP("cmt0", &r_clk, MSTPCR0, 14, 0, 0, 0), |
| MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0, 0, 0), |
| MSTP("dmac1", &div4_clks[DIV4_B], MSTPCR0, 12, 0, 1, 1), |
| MSTP("tmu1", &div4_clks[DIV4_P], MSTPCR0, 10, 0, 1, 0), |
| MSTP("scif0", &div4_clks[DIV4_P], MSTPCR0, 9, 0, 1, 0), |
| MSTP("scif1", &div4_clks[DIV4_P], MSTPCR0, 8, 0, 1, 0), |
| MSTP("scif2", &div4_clks[DIV4_P], MSTPCR0, 7, 0, 1, 0), |
| MSTP("scif3", &div4_clks[DIV4_B], MSTPCR0, 6, 0, 1, 0), |
| MSTP("scif4", &div4_clks[DIV4_B], MSTPCR0, 5, 0, 1, 0), |
| MSTP("scif5", &div4_clks[DIV4_B], MSTPCR0, 4, 0, 1, 0), |
| MSTP("msiof0", &div4_clks[DIV4_B], MSTPCR0, 2, 0, 1, 0), |
| MSTP("msiof1", &div4_clks[DIV4_B], MSTPCR0, 1, 0, 1, 0), |
| |
| MSTP("keysc0", &r_clk, MSTPCR1, 12, 0, 0, 0), |
| MSTP("rtc0", &r_clk, MSTPCR1, 11, 0, 0, 0), |
| MSTP("i2c0", &div4_clks[DIV4_P], MSTPCR1, 9, 0, 1, 0), |
| MSTP("i2c1", &div4_clks[DIV4_P], MSTPCR1, 8, 0, 1, 0), |
| |
| MSTP("mmc0", &div4_clks[DIV4_B], MSTPCR2, 29, 0, 1, 0), |
| MSTP("eth0", &div4_clks[DIV4_B], MSTPCR2, 28, 0, 1, 0), |
| MSTP("atapi0", &div4_clks[DIV4_B], MSTPCR2, 26, 0, 1, 0), |
| MSTP("tpu0", &div4_clks[DIV4_B], MSTPCR2, 25, 0, 1, 0), |
| MSTP("irda0", &div4_clks[DIV4_P], MSTPCR2, 24, 0, 1, 0), |
| MSTP("tsif0", &div4_clks[DIV4_B], MSTPCR2, 22, 0, 1, 0), |
| MSTP("usb1", &div4_clks[DIV4_B], MSTPCR2, 21, 0, 1, 1), |
| MSTP("usb0", &div4_clks[DIV4_B], MSTPCR2, 20, 0, 1, 1), |
| MSTP("2dg0", &div4_clks[DIV4_B], MSTPCR2, 19, 0, 1, 1), |
| MSTP("sdhi0", &div4_clks[DIV4_B], MSTPCR2, 18, 0, 1, 0), |
| MSTP("sdhi1", &div4_clks[DIV4_B], MSTPCR2, 17, 0, 1, 0), |
| MSTP("veu1", &div4_clks[DIV4_B], MSTPCR2, 15, 1, 1, 1), |
| MSTP("ceu1", &div4_clks[DIV4_B], MSTPCR2, 13, 0, 1, 1), |
| MSTP("beu1", &div4_clks[DIV4_B], MSTPCR2, 12, 0, 1, 1), |
| MSTP("2ddmac0", &div4_clks[DIV4_SH], MSTPCR2, 10, 0, 1, 1), |
| MSTP("spu0", &div4_clks[DIV4_B], MSTPCR2, 9, 0, 1, 0), |
| MSTP("jpu0", &div4_clks[DIV4_B], MSTPCR2, 6, 1, 1, 1), |
| MSTP("vou0", &div4_clks[DIV4_B], MSTPCR2, 5, 0, 1, 1), |
| MSTP("beu0", &div4_clks[DIV4_B], MSTPCR2, 4, 0, 1, 1), |
| MSTP("ceu0", &div4_clks[DIV4_B], MSTPCR2, 3, 0, 1, 1), |
| MSTP("veu0", &div4_clks[DIV4_B], MSTPCR2, 2, 1, 1, 1), |
| MSTP("vpu0", &div4_clks[DIV4_B], MSTPCR2, 1, 1, 1, 1), |
| MSTP("lcdc0", &div4_clks[DIV4_B], MSTPCR2, 0, 0, 1, 1), |
| }; |
| |
| 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_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks)); |
| |
| return ret; |
| } |