| /* |
| * r8a7779 clock framework support |
| * |
| * Copyright (C) 2011 Renesas Solutions Corp. |
| * Copyright (C) 2011 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/bitops.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/io.h> |
| #include <linux/sh_clk.h> |
| #include <linux/clkdev.h> |
| #include <linux/sh_timer.h> |
| |
| #include "clock.h" |
| #include "common.h" |
| #include "r8a7779.h" |
| |
| /* |
| * MD1 = 1 MD1 = 0 |
| * (PLLA = 1500) (PLLA = 1600) |
| * (MHz) (MHz) |
| *------------------------------------------------+-------------------- |
| * clkz 1000 (2/3) 800 (1/2) |
| * clkzs 250 (1/6) 200 (1/8) |
| * clki 750 (1/2) 800 (1/2) |
| * clks 250 (1/6) 200 (1/8) |
| * clks1 125 (1/12) 100 (1/16) |
| * clks3 187.5 (1/8) 200 (1/8) |
| * clks4 93.7 (1/16) 100 (1/16) |
| * clkp 62.5 (1/24) 50 (1/32) |
| * clkg 62.5 (1/24) 66.6 (1/24) |
| * clkb, CLKOUT |
| * (MD2 = 0) 62.5 (1/24) 66.6 (1/24) |
| * (MD2 = 1) 41.6 (1/36) 50 (1/32) |
| */ |
| |
| #define MD(nr) BIT(nr) |
| |
| #define MSTPCR0 IOMEM(0xffc80030) |
| #define MSTPCR1 IOMEM(0xffc80034) |
| #define MSTPCR3 IOMEM(0xffc8003c) |
| #define MSTPSR1 IOMEM(0xffc80044) |
| |
| /* ioremap() through clock mapping mandatory to avoid |
| * collision with ARM coherent DMA virtual memory range. |
| */ |
| |
| static struct clk_mapping cpg_mapping = { |
| .phys = 0xffc80000, |
| .len = 0x80, |
| }; |
| |
| /* |
| * Default rate for the root input clock, reset this with clk_set_rate() |
| * from the platform code. |
| */ |
| static struct clk plla_clk = { |
| /* .rate will be updated on r8a7779_clock_init() */ |
| .mapping = &cpg_mapping, |
| }; |
| |
| /* |
| * clock ratio of these clock will be updated |
| * on r8a7779_clock_init() |
| */ |
| SH_FIXED_RATIO_CLK_SET(clkz_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clkzs_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clki_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clks_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clks1_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clks3_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clks4_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clkb_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clkout_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clkp_clk, plla_clk, 1, 1); |
| SH_FIXED_RATIO_CLK_SET(clkg_clk, plla_clk, 1, 1); |
| |
| static struct clk *main_clks[] = { |
| &plla_clk, |
| &clkz_clk, |
| &clkzs_clk, |
| &clki_clk, |
| &clks_clk, |
| &clks1_clk, |
| &clks3_clk, |
| &clks4_clk, |
| &clkb_clk, |
| &clkout_clk, |
| &clkp_clk, |
| &clkg_clk, |
| }; |
| |
| enum { MSTP323, MSTP322, MSTP321, MSTP320, |
| MSTP120, |
| MSTP116, MSTP115, MSTP114, |
| MSTP110, MSTP109, MSTP108, |
| MSTP103, MSTP101, MSTP100, |
| MSTP030, |
| MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021, |
| MSTP016, MSTP015, MSTP014, |
| MSTP007, |
| MSTP_NR }; |
| |
| static struct clk mstp_clks[MSTP_NR] = { |
| [MSTP323] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 23, 0), /* SDHI0 */ |
| [MSTP322] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 22, 0), /* SDHI1 */ |
| [MSTP321] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 21, 0), /* SDHI2 */ |
| [MSTP320] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 20, 0), /* SDHI3 */ |
| [MSTP120] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 20, MSTPSR1, 0), /* VIN3 */ |
| [MSTP116] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 16, MSTPSR1, 0), /* PCIe */ |
| [MSTP115] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 15, MSTPSR1, 0), /* SATA */ |
| [MSTP114] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 14, MSTPSR1, 0), /* Ether */ |
| [MSTP110] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 10, MSTPSR1, 0), /* VIN0 */ |
| [MSTP109] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 9, MSTPSR1, 0), /* VIN1 */ |
| [MSTP108] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 8, MSTPSR1, 0), /* VIN2 */ |
| [MSTP103] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 3, MSTPSR1, 0), /* DU */ |
| [MSTP101] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 1, MSTPSR1, 0), /* USB2 */ |
| [MSTP100] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 0, MSTPSR1, 0), /* USB0/1 */ |
| [MSTP030] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 30, 0), /* I2C0 */ |
| [MSTP029] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 29, 0), /* I2C1 */ |
| [MSTP028] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 28, 0), /* I2C2 */ |
| [MSTP027] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 27, 0), /* I2C3 */ |
| [MSTP026] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 26, 0), /* SCIF0 */ |
| [MSTP025] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 25, 0), /* SCIF1 */ |
| [MSTP024] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 24, 0), /* SCIF2 */ |
| [MSTP023] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 23, 0), /* SCIF3 */ |
| [MSTP022] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 22, 0), /* SCIF4 */ |
| [MSTP021] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 21, 0), /* SCIF5 */ |
| [MSTP016] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 16, 0), /* TMU0 */ |
| [MSTP015] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 15, 0), /* TMU1 */ |
| [MSTP014] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 14, 0), /* TMU2 */ |
| [MSTP007] = SH_CLK_MSTP32(&clks_clk, MSTPCR0, 7, 0), /* HSPI */ |
| }; |
| |
| static struct clk_lookup lookups[] = { |
| /* main clocks */ |
| CLKDEV_CON_ID("plla_clk", &plla_clk), |
| CLKDEV_CON_ID("clkz_clk", &clkz_clk), |
| CLKDEV_CON_ID("clkzs_clk", &clkzs_clk), |
| |
| /* DIV4 clocks */ |
| CLKDEV_CON_ID("shyway_clk", &clks_clk), |
| CLKDEV_CON_ID("bus_clk", &clkout_clk), |
| CLKDEV_CON_ID("shyway4_clk", &clks4_clk), |
| CLKDEV_CON_ID("shyway3_clk", &clks3_clk), |
| CLKDEV_CON_ID("shyway1_clk", &clks1_clk), |
| CLKDEV_CON_ID("peripheral_clk", &clkp_clk), |
| |
| /* MSTP32 clocks */ |
| CLKDEV_DEV_ID("r8a7779-vin.3", &mstp_clks[MSTP120]), /* VIN3 */ |
| CLKDEV_DEV_ID("rcar-pcie", &mstp_clks[MSTP116]), /* PCIe */ |
| CLKDEV_DEV_ID("sata_rcar", &mstp_clks[MSTP115]), /* SATA */ |
| CLKDEV_DEV_ID("fc600000.sata", &mstp_clks[MSTP115]), /* SATA w/DT */ |
| CLKDEV_DEV_ID("r8a777x-ether", &mstp_clks[MSTP114]), /* Ether */ |
| CLKDEV_DEV_ID("r8a7779-vin.0", &mstp_clks[MSTP110]), /* VIN0 */ |
| CLKDEV_DEV_ID("r8a7779-vin.1", &mstp_clks[MSTP109]), /* VIN1 */ |
| CLKDEV_DEV_ID("r8a7779-vin.2", &mstp_clks[MSTP108]), /* VIN2 */ |
| CLKDEV_DEV_ID("ehci-platform.1", &mstp_clks[MSTP101]), /* USB EHCI port2 */ |
| CLKDEV_DEV_ID("ohci-platform.1", &mstp_clks[MSTP101]), /* USB OHCI port2 */ |
| CLKDEV_DEV_ID("ehci-platform.0", &mstp_clks[MSTP100]), /* USB EHCI port0/1 */ |
| CLKDEV_DEV_ID("ohci-platform.0", &mstp_clks[MSTP100]), /* USB OHCI port0/1 */ |
| CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP016]), /* TMU0 */ |
| CLKDEV_DEV_ID("i2c-rcar.0", &mstp_clks[MSTP030]), /* I2C0 */ |
| CLKDEV_DEV_ID("ffc70000.i2c", &mstp_clks[MSTP030]), /* I2C0 */ |
| CLKDEV_DEV_ID("i2c-rcar.1", &mstp_clks[MSTP029]), /* I2C1 */ |
| CLKDEV_DEV_ID("ffc71000.i2c", &mstp_clks[MSTP029]), /* I2C1 */ |
| CLKDEV_DEV_ID("i2c-rcar.2", &mstp_clks[MSTP028]), /* I2C2 */ |
| CLKDEV_DEV_ID("ffc72000.i2c", &mstp_clks[MSTP028]), /* I2C2 */ |
| CLKDEV_DEV_ID("i2c-rcar.3", &mstp_clks[MSTP027]), /* I2C3 */ |
| CLKDEV_DEV_ID("ffc73000.i2c", &mstp_clks[MSTP027]), /* I2C3 */ |
| CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP026]), /* SCIF0 */ |
| CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP025]), /* SCIF1 */ |
| CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP024]), /* SCIF2 */ |
| CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP023]), /* SCIF3 */ |
| CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP022]), /* SCIF4 */ |
| CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP021]), /* SCIF6 */ |
| CLKDEV_DEV_ID("sh-hspi.0", &mstp_clks[MSTP007]), /* HSPI0 */ |
| CLKDEV_DEV_ID("fffc7000.spi", &mstp_clks[MSTP007]), /* HSPI0 */ |
| CLKDEV_DEV_ID("sh-hspi.1", &mstp_clks[MSTP007]), /* HSPI1 */ |
| CLKDEV_DEV_ID("fffc8000.spi", &mstp_clks[MSTP007]), /* HSPI1 */ |
| CLKDEV_DEV_ID("sh-hspi.2", &mstp_clks[MSTP007]), /* HSPI2 */ |
| CLKDEV_DEV_ID("fffc6000.spi", &mstp_clks[MSTP007]), /* HSPI2 */ |
| CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP323]), /* SDHI0 */ |
| CLKDEV_DEV_ID("ffe4c000.sd", &mstp_clks[MSTP323]), /* SDHI0 */ |
| CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP322]), /* SDHI1 */ |
| CLKDEV_DEV_ID("ffe4d000.sd", &mstp_clks[MSTP322]), /* SDHI1 */ |
| CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP321]), /* SDHI2 */ |
| CLKDEV_DEV_ID("ffe4e000.sd", &mstp_clks[MSTP321]), /* SDHI2 */ |
| CLKDEV_DEV_ID("sh_mobile_sdhi.3", &mstp_clks[MSTP320]), /* SDHI3 */ |
| CLKDEV_DEV_ID("ffe4f000.sd", &mstp_clks[MSTP320]), /* SDHI3 */ |
| CLKDEV_DEV_ID("rcar-du-r8a7779", &mstp_clks[MSTP103]), /* DU */ |
| }; |
| |
| void __init r8a7779_clock_init(void) |
| { |
| u32 mode = r8a7779_read_mode_pins(); |
| int k, ret = 0; |
| |
| if (mode & MD(1)) { |
| plla_clk.rate = 1500000000; |
| |
| SH_CLK_SET_RATIO(&clkz_clk_ratio, 2, 3); |
| SH_CLK_SET_RATIO(&clkzs_clk_ratio, 1, 6); |
| SH_CLK_SET_RATIO(&clki_clk_ratio, 1, 2); |
| SH_CLK_SET_RATIO(&clks_clk_ratio, 1, 6); |
| SH_CLK_SET_RATIO(&clks1_clk_ratio, 1, 12); |
| SH_CLK_SET_RATIO(&clks3_clk_ratio, 1, 8); |
| SH_CLK_SET_RATIO(&clks4_clk_ratio, 1, 16); |
| SH_CLK_SET_RATIO(&clkp_clk_ratio, 1, 24); |
| SH_CLK_SET_RATIO(&clkg_clk_ratio, 1, 24); |
| if (mode & MD(2)) { |
| SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 36); |
| SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 36); |
| } else { |
| SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 24); |
| SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 24); |
| } |
| } else { |
| plla_clk.rate = 1600000000; |
| |
| SH_CLK_SET_RATIO(&clkz_clk_ratio, 1, 2); |
| SH_CLK_SET_RATIO(&clkzs_clk_ratio, 1, 8); |
| SH_CLK_SET_RATIO(&clki_clk_ratio, 1, 2); |
| SH_CLK_SET_RATIO(&clks_clk_ratio, 1, 8); |
| SH_CLK_SET_RATIO(&clks1_clk_ratio, 1, 16); |
| SH_CLK_SET_RATIO(&clks3_clk_ratio, 1, 8); |
| SH_CLK_SET_RATIO(&clks4_clk_ratio, 1, 16); |
| SH_CLK_SET_RATIO(&clkp_clk_ratio, 1, 32); |
| SH_CLK_SET_RATIO(&clkg_clk_ratio, 1, 24); |
| if (mode & MD(2)) { |
| SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 32); |
| SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 32); |
| } else { |
| SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 24); |
| SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 24); |
| } |
| } |
| |
| for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) |
| ret = clk_register(main_clks[k]); |
| |
| if (!ret) |
| ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); |
| |
| clkdev_add_table(lookups, ARRAY_SIZE(lookups)); |
| |
| if (!ret) |
| shmobile_clk_init(); |
| else |
| panic("failed to setup r8a7779 clocks\n"); |
| } |
| |
| /* do nothing for !CONFIG_SMP or !CONFIG_HAVE_TWD */ |
| void __init __weak r8a7779_register_twd(void) { } |
| |
| void __init r8a7779_earlytimer_init(void) |
| { |
| r8a7779_clock_init(); |
| r8a7779_register_twd(); |
| shmobile_earlytimer_init(); |
| } |
