268 lines
9.1 KiB
C
268 lines
9.1 KiB
C
/*
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* r8a7778 clock framework support
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*
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* Copyright (C) 2013 Renesas Solutions Corp.
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* Copyright (C) 2013 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* based on r8a7779
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Copyright (C) 2011 Magnus Damm
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* MD MD MD MD PLLA PLLB EXTAL clki clkz
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* 19 18 12 11 (HMz) (MHz) (MHz)
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*----------------------------------------------------------------------------
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* 1 0 0 0 x21 x21 38.00 800 800
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* 1 0 0 1 x24 x24 33.33 800 800
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* 1 0 1 0 x28 x28 28.50 800 800
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* 1 0 1 1 x32 x32 25.00 800 800
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* 1 1 0 1 x24 x21 33.33 800 700
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* 1 1 1 0 x28 x21 28.50 800 600
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* 1 1 1 1 x32 x24 25.00 800 600
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*/
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#include <linux/io.h>
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#include <linux/sh_clk.h>
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#include <linux/clkdev.h>
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#include <mach/clock.h>
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#include <mach/common.h>
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#define MSTPCR0 IOMEM(0xffc80030)
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#define MSTPCR1 IOMEM(0xffc80034)
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#define MSTPCR3 IOMEM(0xffc8003c)
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#define MSTPSR1 IOMEM(0xffc80044)
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#define MSTPSR4 IOMEM(0xffc80048)
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#define MSTPSR6 IOMEM(0xffc8004c)
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#define MSTPCR4 IOMEM(0xffc80050)
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#define MSTPCR5 IOMEM(0xffc80054)
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#define MSTPCR6 IOMEM(0xffc80058)
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#define MODEMR 0xFFCC0020
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#define MD(nr) BIT(nr)
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/* ioremap() through clock mapping mandatory to avoid
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* collision with ARM coherent DMA virtual memory range.
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*/
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static struct clk_mapping cpg_mapping = {
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.phys = 0xffc80000,
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.len = 0x80,
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};
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static struct clk extal_clk = {
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/* .rate will be updated on r8a7778_clock_init() */
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.mapping = &cpg_mapping,
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};
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/*
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* clock ratio of these clock will be updated
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* on r8a7778_clock_init()
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*/
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SH_FIXED_RATIO_CLK_SET(plla_clk, extal_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(pllb_clk, extal_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(i_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(s_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(s1_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(s3_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(s4_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(b_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(out_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(p_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(g_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(z_clk, pllb_clk, 1, 1);
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static struct clk *main_clks[] = {
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&extal_clk,
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&plla_clk,
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&pllb_clk,
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&i_clk,
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&s_clk,
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&s1_clk,
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&s3_clk,
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&s4_clk,
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&b_clk,
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&out_clk,
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&p_clk,
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&g_clk,
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&z_clk,
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};
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enum {
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MSTP331,
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MSTP323, MSTP322, MSTP321,
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MSTP114,
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MSTP110, MSTP109,
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MSTP100,
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MSTP030,
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MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
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MSTP016, MSTP015,
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MSTP007,
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MSTP_NR };
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static struct clk mstp_clks[MSTP_NR] = {
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[MSTP331] = SH_CLK_MSTP32(&s4_clk, MSTPCR3, 31, 0), /* MMC */
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[MSTP323] = SH_CLK_MSTP32(&p_clk, MSTPCR3, 23, 0), /* SDHI0 */
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[MSTP322] = SH_CLK_MSTP32(&p_clk, MSTPCR3, 22, 0), /* SDHI1 */
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[MSTP321] = SH_CLK_MSTP32(&p_clk, MSTPCR3, 21, 0), /* SDHI2 */
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[MSTP114] = SH_CLK_MSTP32(&p_clk, MSTPCR1, 14, 0), /* Ether */
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[MSTP110] = SH_CLK_MSTP32(&s_clk, MSTPCR1, 10, 0), /* VIN0 */
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[MSTP109] = SH_CLK_MSTP32(&s_clk, MSTPCR1, 9, 0), /* VIN1 */
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[MSTP100] = SH_CLK_MSTP32(&p_clk, MSTPCR1, 0, 0), /* USB0/1 */
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[MSTP030] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 30, 0), /* I2C0 */
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[MSTP029] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 29, 0), /* I2C1 */
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[MSTP028] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 28, 0), /* I2C2 */
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[MSTP027] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 27, 0), /* I2C3 */
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[MSTP026] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 26, 0), /* SCIF0 */
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[MSTP025] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 25, 0), /* SCIF1 */
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[MSTP024] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 24, 0), /* SCIF2 */
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[MSTP023] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 23, 0), /* SCIF3 */
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[MSTP022] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 22, 0), /* SCIF4 */
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[MSTP021] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 21, 0), /* SCIF5 */
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[MSTP016] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 16, 0), /* TMU0 */
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[MSTP015] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 15, 0), /* TMU1 */
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[MSTP007] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 7, 0), /* HSPI */
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};
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static struct clk_lookup lookups[] = {
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/* main */
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CLKDEV_CON_ID("shyway_clk", &s_clk),
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CLKDEV_CON_ID("peripheral_clk", &p_clk),
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/* MSTP32 clocks */
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CLKDEV_DEV_ID("sh_mmcif", &mstp_clks[MSTP331]), /* MMC */
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CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP323]), /* SDHI0 */
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CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP322]), /* SDHI1 */
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CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP321]), /* SDHI2 */
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CLKDEV_DEV_ID("r8a777x-ether", &mstp_clks[MSTP114]), /* Ether */
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CLKDEV_DEV_ID("r8a7778-vin.0", &mstp_clks[MSTP110]), /* VIN0 */
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CLKDEV_DEV_ID("r8a7778-vin.1", &mstp_clks[MSTP109]), /* VIN1 */
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CLKDEV_DEV_ID("ehci-platform", &mstp_clks[MSTP100]), /* USB EHCI port0/1 */
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CLKDEV_DEV_ID("ohci-platform", &mstp_clks[MSTP100]), /* USB OHCI port0/1 */
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CLKDEV_DEV_ID("i2c-rcar.0", &mstp_clks[MSTP030]), /* I2C0 */
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CLKDEV_DEV_ID("i2c-rcar.1", &mstp_clks[MSTP029]), /* I2C1 */
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CLKDEV_DEV_ID("i2c-rcar.2", &mstp_clks[MSTP028]), /* I2C2 */
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CLKDEV_DEV_ID("i2c-rcar.3", &mstp_clks[MSTP027]), /* I2C3 */
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CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP026]), /* SCIF0 */
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CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP025]), /* SCIF1 */
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CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP024]), /* SCIF2 */
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CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP023]), /* SCIF3 */
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CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP022]), /* SCIF4 */
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CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP021]), /* SCIF6 */
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CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */
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CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP015]), /* TMU01 */
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CLKDEV_DEV_ID("sh-hspi.0", &mstp_clks[MSTP007]), /* HSPI0 */
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CLKDEV_DEV_ID("sh-hspi.1", &mstp_clks[MSTP007]), /* HSPI1 */
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CLKDEV_DEV_ID("sh-hspi.2", &mstp_clks[MSTP007]), /* HSPI2 */
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};
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void __init r8a7778_clock_init(void)
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{
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void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE);
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u32 mode;
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int k, ret = 0;
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BUG_ON(!modemr);
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mode = ioread32(modemr);
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iounmap(modemr);
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switch (mode & (MD(19) | MD(18) | MD(12) | MD(11))) {
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case MD(19):
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extal_clk.rate = 38000000;
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SH_CLK_SET_RATIO(&plla_clk_ratio, 21, 1);
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SH_CLK_SET_RATIO(&pllb_clk_ratio, 21, 1);
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break;
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case MD(19) | MD(11):
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extal_clk.rate = 33333333;
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SH_CLK_SET_RATIO(&plla_clk_ratio, 24, 1);
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SH_CLK_SET_RATIO(&pllb_clk_ratio, 24, 1);
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break;
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case MD(19) | MD(12):
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extal_clk.rate = 28500000;
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SH_CLK_SET_RATIO(&plla_clk_ratio, 28, 1);
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SH_CLK_SET_RATIO(&pllb_clk_ratio, 28, 1);
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break;
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case MD(19) | MD(12) | MD(11):
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extal_clk.rate = 25000000;
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SH_CLK_SET_RATIO(&plla_clk_ratio, 32, 1);
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SH_CLK_SET_RATIO(&pllb_clk_ratio, 32, 1);
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break;
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case MD(19) | MD(18) | MD(11):
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extal_clk.rate = 33333333;
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SH_CLK_SET_RATIO(&plla_clk_ratio, 24, 1);
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SH_CLK_SET_RATIO(&pllb_clk_ratio, 21, 1);
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break;
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case MD(19) | MD(18) | MD(12):
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extal_clk.rate = 28500000;
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SH_CLK_SET_RATIO(&plla_clk_ratio, 28, 1);
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SH_CLK_SET_RATIO(&pllb_clk_ratio, 21, 1);
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break;
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case MD(19) | MD(18) | MD(12) | MD(11):
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extal_clk.rate = 25000000;
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SH_CLK_SET_RATIO(&plla_clk_ratio, 32, 1);
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SH_CLK_SET_RATIO(&pllb_clk_ratio, 24, 1);
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break;
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default:
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BUG();
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}
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if (mode & MD(1)) {
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SH_CLK_SET_RATIO(&i_clk_ratio, 1, 1);
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SH_CLK_SET_RATIO(&s_clk_ratio, 1, 3);
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SH_CLK_SET_RATIO(&s1_clk_ratio, 1, 6);
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SH_CLK_SET_RATIO(&s3_clk_ratio, 1, 4);
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SH_CLK_SET_RATIO(&s4_clk_ratio, 1, 8);
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SH_CLK_SET_RATIO(&p_clk_ratio, 1, 12);
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SH_CLK_SET_RATIO(&g_clk_ratio, 1, 12);
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if (mode & MD(2)) {
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SH_CLK_SET_RATIO(&b_clk_ratio, 1, 18);
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SH_CLK_SET_RATIO(&out_clk_ratio, 1, 18);
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} else {
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SH_CLK_SET_RATIO(&b_clk_ratio, 1, 12);
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SH_CLK_SET_RATIO(&out_clk_ratio, 1, 12);
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}
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} else {
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SH_CLK_SET_RATIO(&i_clk_ratio, 1, 1);
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SH_CLK_SET_RATIO(&s_clk_ratio, 1, 4);
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SH_CLK_SET_RATIO(&s1_clk_ratio, 1, 8);
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SH_CLK_SET_RATIO(&s3_clk_ratio, 1, 4);
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SH_CLK_SET_RATIO(&s4_clk_ratio, 1, 8);
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SH_CLK_SET_RATIO(&p_clk_ratio, 1, 16);
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SH_CLK_SET_RATIO(&g_clk_ratio, 1, 12);
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if (mode & MD(2)) {
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SH_CLK_SET_RATIO(&b_clk_ratio, 1, 16);
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SH_CLK_SET_RATIO(&out_clk_ratio, 1, 16);
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} else {
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SH_CLK_SET_RATIO(&b_clk_ratio, 1, 12);
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SH_CLK_SET_RATIO(&out_clk_ratio, 1, 12);
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}
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}
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for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
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ret = clk_register(main_clks[k]);
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if (!ret)
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ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
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clkdev_add_table(lookups, ARRAY_SIZE(lookups));
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if (!ret)
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shmobile_clk_init();
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else
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panic("failed to setup r8a7778 clocks\n");
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}
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