| /* |
| * 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 <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/io.h> |
| #include <linux/clkdev.h> |
| #include <asm/clock.h> |
| |
| /* 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 = { |
| .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 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 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_SIUA, DIV4_SIUB, 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, 0x1fef, CLK_ENABLE_ON_INIT), |
| [DIV4_U] = DIV4(FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT), |
| [DIV4_SH] = DIV4(FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT), |
| [DIV4_B] = DIV4(FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT), |
| [DIV4_B3] = DIV4(FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT), |
| [DIV4_P] = DIV4(FRQCR, 0, 0x1fff, 0), |
| [DIV4_SIUA] = DIV4(SCLKACR, 0, 0x1fff, 0), |
| [DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x1fff, 0), |
| }; |
| |
| enum { DIV6_V, DIV6_NR }; |
| |
| struct clk div6_clks[DIV6_NR] = { |
| [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0), |
| }; |
| |
| #define MSTP(_parent, _reg, _bit, _flags) \ |
| SH_CLK_MSTP32(_parent, _reg, _bit, _flags) |
| |
| enum { MSTP031, MSTP030, MSTP029, MSTP028, MSTP026, |
| MSTP023, MSTP022, MSTP021, MSTP020, MSTP019, MSTP018, MSTP017, MSTP016, |
| MSTP015, MSTP014, MSTP013, MSTP012, MSTP011, MSTP010, |
| MSTP007, MSTP006, MSTP005, MSTP002, MSTP001, |
| MSTP109, MSTP100, |
| MSTP227, MSTP226, MSTP224, MSTP223, MSTP222, MSTP218, MSTP217, |
| MSTP211, MSTP207, MSTP205, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200, |
| MSTP_NR }; |
| |
| static struct clk mstp_clks[MSTP_NR] = { |
| /* See page 52 of Datasheet V0.40: Overview -> Block Diagram */ |
| [MSTP031] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT), |
| [MSTP030] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT), |
| [MSTP029] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT), |
| [MSTP028] = MSTP(&div4_clks[DIV4_SH], MSTPCR0, 28, CLK_ENABLE_ON_INIT), |
| [MSTP026] = MSTP(&div4_clks[DIV4_B], MSTPCR0, 26, CLK_ENABLE_ON_INIT), |
| [MSTP023] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 23, 0), |
| [MSTP022] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 22, 0), |
| [MSTP021] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 21, 0), |
| [MSTP020] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 20, 0), |
| [MSTP019] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 19, 0), |
| [MSTP017] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 17, 0), |
| [MSTP015] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 15, 0), |
| [MSTP014] = MSTP(&r_clk, MSTPCR0, 14, 0), |
| [MSTP013] = MSTP(&r_clk, MSTPCR0, 13, 0), |
| [MSTP011] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 11, 0), |
| [MSTP010] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 10, 0), |
| [MSTP007] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 7, 0), |
| [MSTP006] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 6, 0), |
| [MSTP005] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 5, 0), |
| [MSTP002] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 2, 0), |
| [MSTP001] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 1, 0), |
| |
| [MSTP109] = MSTP(&div4_clks[DIV4_P], MSTPCR1, 9, 0), |
| |
| [MSTP227] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 27, 0), |
| [MSTP226] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 26, 0), |
| [MSTP224] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 24, 0), |
| [MSTP223] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 23, 0), |
| [MSTP222] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 22, 0), |
| [MSTP218] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 18, 0), |
| [MSTP217] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 17, 0), |
| [MSTP211] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 11, 0), |
| [MSTP207] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 7, CLK_ENABLE_ON_INIT), |
| [MSTP205] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 5, 0), |
| [MSTP204] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 4, 0), |
| [MSTP203] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 3, 0), |
| [MSTP202] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 2, CLK_ENABLE_ON_INIT), |
| [MSTP201] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 1, CLK_ENABLE_ON_INIT), |
| [MSTP200] = MSTP(&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("siua_clk", &div4_clks[DIV4_SIUA]), |
| CLKDEV_CON_ID("siub_clk", &div4_clks[DIV4_SIUB]), |
| |
| /* DIV6 clocks */ |
| CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]), |
| |
| /* MSTP32 clocks */ |
| CLKDEV_CON_ID("tlb0", &mstp_clks[MSTP031]), |
| CLKDEV_CON_ID("ic0", &mstp_clks[MSTP030]), |
| CLKDEV_CON_ID("oc0", &mstp_clks[MSTP029]), |
| CLKDEV_CON_ID("rsmem0", &mstp_clks[MSTP028]), |
| CLKDEV_CON_ID("xymem0", &mstp_clks[MSTP026]), |
| CLKDEV_CON_ID("intc3", &mstp_clks[MSTP023]), |
| CLKDEV_CON_ID("intc0", &mstp_clks[MSTP022]), |
| CLKDEV_CON_ID("dmac0", &mstp_clks[MSTP021]), |
| CLKDEV_CON_ID("sh0", &mstp_clks[MSTP020]), |
| CLKDEV_CON_ID("hudi0", &mstp_clks[MSTP019]), |
| CLKDEV_CON_ID("ubc0", &mstp_clks[MSTP017]), |
| CLKDEV_CON_ID("tmu_fck", &mstp_clks[MSTP015]), |
| CLKDEV_CON_ID("cmt_fck", &mstp_clks[MSTP014]), |
| CLKDEV_CON_ID("rwdt0", &mstp_clks[MSTP013]), |
| CLKDEV_CON_ID("mfi0", &mstp_clks[MSTP011]), |
| CLKDEV_CON_ID("flctl0", &mstp_clks[MSTP010]), |
| |
| CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP007]), |
| CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP006]), |
| CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP005]), |
| |
| CLKDEV_CON_ID("msiof0", &mstp_clks[MSTP002]), |
| CLKDEV_CON_ID("sbr0", &mstp_clks[MSTP001]), |
| CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP109]), |
| CLKDEV_CON_ID("icb0", &mstp_clks[MSTP227]), |
| CLKDEV_CON_ID("meram0", &mstp_clks[MSTP226]), |
| CLKDEV_CON_ID("dacy1", &mstp_clks[MSTP224]), |
| CLKDEV_CON_ID("dacy0", &mstp_clks[MSTP223]), |
| CLKDEV_CON_ID("tsif0", &mstp_clks[MSTP222]), |
| CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP218]), |
| CLKDEV_CON_ID("mmcif0", &mstp_clks[MSTP217]), |
| CLKDEV_CON_ID("usbf0", &mstp_clks[MSTP211]), |
| CLKDEV_CON_ID("veu1", &mstp_clks[MSTP207]), |
| CLKDEV_CON_ID("vou0", &mstp_clks[MSTP205]), |
| CLKDEV_CON_ID("beu0", &mstp_clks[MSTP204]), |
| CLKDEV_CON_ID("ceu0", &mstp_clks[MSTP203]), |
| CLKDEV_CON_ID("veu0", &mstp_clks[MSTP202]), |
| CLKDEV_CON_ID("vpu0", &mstp_clks[MSTP201]), |
| CLKDEV_CON_ID("lcdc0", &mstp_clks[MSTP200]), |
| }; |
| |
| 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_div6_register(div6_clks, DIV6_NR); |
| |
| if (!ret) |
| ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); |
| |
| return ret; |
| } |