diff options
Diffstat (limited to 'arch/arm/mach-shmobile/clock-sh73a0.c')
| -rw-r--r-- | arch/arm/mach-shmobile/clock-sh73a0.c | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/clock-sh73a0.c b/arch/arm/mach-shmobile/clock-sh73a0.c new file mode 100644 index 000000000000..720a71433be6 --- /dev/null +++ b/arch/arm/mach-shmobile/clock-sh73a0.c @@ -0,0 +1,356 @@ +/* + * sh73a0 clock framework support + * + * Copyright (C) 2010 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/sh_clk.h> +#include <linux/clkdev.h> +#include <mach/common.h> + +#define FRQCRA 0xe6150000 +#define FRQCRB 0xe6150004 +#define FRQCRD 0xe61500e4 +#define VCLKCR1 0xe6150008 +#define VCLKCR2 0xe615000C +#define VCLKCR3 0xe615001C +#define ZBCKCR 0xe6150010 +#define FLCKCR 0xe6150014 +#define SD0CKCR 0xe6150074 +#define SD1CKCR 0xe6150078 +#define SD2CKCR 0xe615007C +#define FSIACKCR 0xe6150018 +#define FSIBCKCR 0xe6150090 +#define SUBCKCR 0xe6150080 +#define SPUACKCR 0xe6150084 +#define SPUVCKCR 0xe6150094 +#define MSUCKCR 0xe6150088 +#define HSICKCR 0xe615008C +#define MFCK1CR 0xe6150098 +#define MFCK2CR 0xe615009C +#define DSITCKCR 0xe6150060 +#define DSI0PCKCR 0xe6150064 +#define DSI1PCKCR 0xe6150068 +#define DSI0PHYCR 0xe615006C +#define DSI1PHYCR 0xe6150070 +#define PLLECR 0xe61500d0 +#define PLL0CR 0xe61500d8 +#define PLL1CR 0xe6150028 +#define PLL2CR 0xe615002c +#define PLL3CR 0xe61500dc +#define SMSTPCR0 0xe6150130 +#define SMSTPCR1 0xe6150134 +#define SMSTPCR2 0xe6150138 +#define SMSTPCR3 0xe615013c +#define SMSTPCR4 0xe6150140 +#define SMSTPCR5 0xe6150144 +#define CKSCR 0xe61500c0 + +/* Fixed 32 KHz root clock from EXTALR pin */ +static struct clk r_clk = { + .rate = 32768, +}; + +/* + * 26MHz default rate for the EXTAL1 root input clock. + * If needed, reset this with clk_set_rate() from the platform code. + */ +struct clk sh73a0_extal1_clk = { + .rate = 26000000, +}; + +/* + * 48MHz default rate for the EXTAL2 root input clock. + * If needed, reset this with clk_set_rate() from the platform code. + */ +struct clk sh73a0_extal2_clk = { + .rate = 48000000, +}; + +/* A fixed divide-by-2 block */ +static unsigned long div2_recalc(struct clk *clk) +{ + return clk->parent->rate / 2; +} + +static struct clk_ops div2_clk_ops = { + .recalc = div2_recalc, +}; + +/* Divide extal1 by two */ +static struct clk extal1_div2_clk = { + .ops = &div2_clk_ops, + .parent = &sh73a0_extal1_clk, +}; + +/* Divide extal2 by two */ +static struct clk extal2_div2_clk = { + .ops = &div2_clk_ops, + .parent = &sh73a0_extal2_clk, +}; + +static struct clk_ops main_clk_ops = { + .recalc = followparent_recalc, +}; + +/* Main clock */ +static struct clk main_clk = { + .ops = &main_clk_ops, +}; + +/* PLL0, PLL1, PLL2, PLL3 */ +static unsigned long pll_recalc(struct clk *clk) +{ + unsigned long mult = 1; + + if (__raw_readl(PLLECR) & (1 << clk->enable_bit)) + mult = (((__raw_readl(clk->enable_reg) >> 24) & 0x3f) + 1); + + return clk->parent->rate * mult; +} + +static struct clk_ops pll_clk_ops = { + .recalc = pll_recalc, +}; + +static struct clk pll0_clk = { + .ops = &pll_clk_ops, + .flags = CLK_ENABLE_ON_INIT, + .parent = &main_clk, + .enable_reg = (void __iomem *)PLL0CR, + .enable_bit = 0, +}; + +static struct clk pll1_clk = { + .ops = &pll_clk_ops, + .flags = CLK_ENABLE_ON_INIT, + .parent = &main_clk, + .enable_reg = (void __iomem *)PLL1CR, + .enable_bit = 1, +}; + +static struct clk pll2_clk = { + .ops = &pll_clk_ops, + .flags = CLK_ENABLE_ON_INIT, + .parent = &main_clk, + .enable_reg = (void __iomem *)PLL2CR, + .enable_bit = 2, +}; + +static struct clk pll3_clk = { + .ops = &pll_clk_ops, + .flags = CLK_ENABLE_ON_INIT, + .parent = &main_clk, + .enable_reg = (void __iomem *)PLL3CR, + .enable_bit = 3, +}; + +/* Divide PLL1 by two */ +static struct clk pll1_div2_clk = { + .ops = &div2_clk_ops, + .parent = &pll1_clk, +}; + +static struct clk *main_clks[] = { + &r_clk, + &sh73a0_extal1_clk, + &sh73a0_extal2_clk, + &extal1_div2_clk, + &extal2_div2_clk, + &main_clk, + &pll0_clk, + &pll1_clk, + &pll2_clk, + &pll3_clk, + &pll1_div2_clk, +}; + +static void div4_kick(struct clk *clk) +{ + unsigned long value; + + /* set KICK bit in FRQCRB to update hardware setting */ + value = __raw_readl(FRQCRB); + value |= (1 << 31); + __raw_writel(value, FRQCRB); +} + +static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18, + 24, 0, 36, 48, 7 }; + +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_ZG, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2, + DIV4_Z, DIV4_ZTR, DIV4_ZT, DIV4_ZX, DIV4_HP, DIV4_NR }; + +#define DIV4(_reg, _bit, _mask, _flags) \ + SH_CLK_DIV4(&pll1_clk, _reg, _bit, _mask, _flags) + +static struct clk div4_clks[DIV4_NR] = { + [DIV4_I] = DIV4(FRQCRA, 20, 0xfff, CLK_ENABLE_ON_INIT), + [DIV4_ZG] = DIV4(FRQCRA, 16, 0xbff, CLK_ENABLE_ON_INIT), + [DIV4_M3] = DIV4(FRQCRA, 8, 0xfff, CLK_ENABLE_ON_INIT), + [DIV4_B] = DIV4(FRQCRA, 8, 0xfff, CLK_ENABLE_ON_INIT), + [DIV4_M1] = DIV4(FRQCRA, 4, 0xfff, 0), + [DIV4_M2] = DIV4(FRQCRA, 0, 0xfff, 0), + [DIV4_Z] = DIV4(FRQCRB, 24, 0xbff, 0), + [DIV4_ZTR] = DIV4(FRQCRB, 20, 0xfff, 0), + [DIV4_ZT] = DIV4(FRQCRB, 16, 0xfff, 0), + [DIV4_ZX] = DIV4(FRQCRB, 12, 0xfff, 0), + [DIV4_HP] = DIV4(FRQCRB, 4, 0xfff, 0), +}; + +enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_ZB1, + DIV6_FLCTL, DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2, + DIV6_FSIA, DIV6_FSIB, DIV6_SUB, + DIV6_SPUA, DIV6_SPUV, DIV6_MSU, + DIV6_HSI, DIV6_MFG1, DIV6_MFG2, + DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P, + DIV6_NR }; + +static struct clk div6_clks[DIV6_NR] = { + [DIV6_VCK1] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR1, 0), + [DIV6_VCK2] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR2, 0), + [DIV6_VCK3] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR3, 0), + [DIV6_ZB1] = SH_CLK_DIV6(&pll1_div2_clk, ZBCKCR, 0), + [DIV6_FLCTL] = SH_CLK_DIV6(&pll1_div2_clk, FLCKCR, 0), + [DIV6_SDHI0] = SH_CLK_DIV6(&pll1_div2_clk, SD0CKCR, 0), + [DIV6_SDHI1] = SH_CLK_DIV6(&pll1_div2_clk, SD1CKCR, 0), + [DIV6_SDHI2] = SH_CLK_DIV6(&pll1_div2_clk, SD2CKCR, 0), + [DIV6_FSIA] = SH_CLK_DIV6(&pll1_div2_clk, FSIACKCR, 0), + [DIV6_FSIB] = SH_CLK_DIV6(&pll1_div2_clk, FSIBCKCR, 0), + [DIV6_SUB] = SH_CLK_DIV6(&sh73a0_extal2_clk, SUBCKCR, 0), + [DIV6_SPUA] = SH_CLK_DIV6(&pll1_div2_clk, SPUACKCR, 0), + [DIV6_SPUV] = SH_CLK_DIV6(&pll1_div2_clk, SPUVCKCR, 0), + [DIV6_MSU] = SH_CLK_DIV6(&pll1_div2_clk, MSUCKCR, 0), + [DIV6_HSI] = SH_CLK_DIV6(&pll1_div2_clk, HSICKCR, 0), + [DIV6_MFG1] = SH_CLK_DIV6(&pll1_div2_clk, MFCK1CR, 0), + [DIV6_MFG2] = SH_CLK_DIV6(&pll1_div2_clk, MFCK2CR, 0), + [DIV6_DSIT] = SH_CLK_DIV6(&pll1_div2_clk, DSITCKCR, 0), + [DIV6_DSI0P] = SH_CLK_DIV6(&pll1_div2_clk, DSI0PCKCR, 0), + [DIV6_DSI1P] = SH_CLK_DIV6(&pll1_div2_clk, DSI1PCKCR, 0), +}; + +enum { MSTP001, + MSTP125, MSTP116, + MSTP219, + MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200, + MSTP331, MSTP329, MSTP323, MSTP312, + MSTP411, MSTP410, MSTP403, + MSTP_NR }; + +#define MSTP(_parent, _reg, _bit, _flags) \ + SH_CLK_MSTP32(_parent, _reg, _bit, _flags) + +static struct clk mstp_clks[MSTP_NR] = { + [MSTP001] = MSTP(&div4_clks[DIV4_HP], SMSTPCR0, 1, 0), /* IIC2 */ + [MSTP125] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR1, 25, 0), /* TMU0 */ + [MSTP116] = MSTP(&div4_clks[DIV4_HP], SMSTPCR1, 16, 0), /* IIC0 */ + [MSTP219] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 19, 0), /* SCIFA7 */ + [MSTP207] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 7, 0), /* SCIFA5 */ + [MSTP206] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 6, 0), /* SCIFB */ + [MSTP204] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 4, 0), /* SCIFA0 */ + [MSTP203] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 3, 0), /* SCIFA1 */ + [MSTP202] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 2, 0), /* SCIFA2 */ + [MSTP201] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 1, 0), /* SCIFA3 */ + [MSTP200] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 0, 0), /* SCIFA4 */ + [MSTP331] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 31, 0), /* SCIFA6 */ + [MSTP329] = MSTP(&r_clk, SMSTPCR3, 29, 0), /* CMT10 */ + [MSTP323] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 23, 0), /* IIC1 */ + [MSTP312] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 12, 0), /* MMCIF0 */ + [MSTP411] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 11, 0), /* IIC3 */ + [MSTP410] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 10, 0), /* IIC4 */ + [MSTP403] = MSTP(&r_clk, SMSTPCR4, 3, 0), /* KEYSC */ +}; + +#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk } +#define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk } + +static struct clk_lookup lookups[] = { + /* main clocks */ + CLKDEV_CON_ID("r_clk", &r_clk), + + /* MSTP32 clocks */ + CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[MSTP001]), /* I2C2 */ + CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */ + CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */ + CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */ + CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP219]), /* SCIFA7 */ + CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP207]), /* SCIFA5 */ + CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP206]), /* SCIFB */ + CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */ + CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */ + CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP202]), /* SCIFA2 */ + CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP201]), /* SCIFA3 */ + CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */ + CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */ + CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */ + CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */ + CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP312]), /* MMCIF0 */ + CLKDEV_DEV_ID("i2c-sh_mobile.3", &mstp_clks[MSTP411]), /* I2C3 */ + CLKDEV_DEV_ID("i2c-sh_mobile.4", &mstp_clks[MSTP410]), /* I2C4 */ + CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */ +}; + +void __init sh73a0_clock_init(void) +{ + int k, ret = 0; + + /* detect main clock parent */ + switch ((__raw_readl(CKSCR) >> 24) & 0x03) { + case 0: + main_clk.parent = &sh73a0_extal1_clk; + break; + case 1: + main_clk.parent = &extal1_div2_clk; + break; + case 2: + main_clk.parent = &sh73a0_extal2_clk; + break; + case 3: + main_clk.parent = &extal2_div2_clk; + break; + } + + 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, DIV6_NR); + + if (!ret) + ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); + + clkdev_add_table(lookups, ARRAY_SIZE(lookups)); + + if (!ret) + clk_init(); + else + panic("failed to setup sh73a0 clocks\n"); +} |