276 lines
10 KiB
C
276 lines
10 KiB
C
/*
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* r8a7779 clock framework support
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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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#include <linux/bitops.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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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 <linux/sh_timer.h>
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#include "clock.h"
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#include "common.h"
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#include "r8a7779.h"
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/*
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* MD1 = 1 MD1 = 0
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* (PLLA = 1500) (PLLA = 1600)
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* (MHz) (MHz)
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*------------------------------------------------+--------------------
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* clkz 1000 (2/3) 800 (1/2)
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* clkzs 250 (1/6) 200 (1/8)
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* clki 750 (1/2) 800 (1/2)
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* clks 250 (1/6) 200 (1/8)
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* clks1 125 (1/12) 100 (1/16)
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* clks3 187.5 (1/8) 200 (1/8)
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* clks4 93.7 (1/16) 100 (1/16)
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* clkp 62.5 (1/24) 50 (1/32)
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* clkg 62.5 (1/24) 66.6 (1/24)
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* clkb, CLKOUT
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* (MD2 = 0) 62.5 (1/24) 66.6 (1/24)
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* (MD2 = 1) 41.6 (1/36) 50 (1/32)
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*/
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#define MD(nr) BIT(nr)
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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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/* 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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/*
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* Default rate for the root input clock, reset this with clk_set_rate()
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* from the platform code.
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*/
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static struct clk plla_clk = {
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/* .rate will be updated on r8a7779_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 r8a7779_clock_init()
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*/
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SH_FIXED_RATIO_CLK_SET(clkz_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clkzs_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clki_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clks_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clks1_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clks3_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clks4_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clkb_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clkout_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clkp_clk, plla_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(clkg_clk, plla_clk, 1, 1);
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static struct clk *main_clks[] = {
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&plla_clk,
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&clkz_clk,
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&clkzs_clk,
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&clki_clk,
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&clks_clk,
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&clks1_clk,
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&clks3_clk,
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&clks4_clk,
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&clkb_clk,
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&clkout_clk,
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&clkp_clk,
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&clkg_clk,
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};
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enum { MSTP323, MSTP322, MSTP321, MSTP320,
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MSTP120,
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MSTP116, MSTP115, MSTP114,
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MSTP110, MSTP109, MSTP108,
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MSTP103, MSTP101, 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, MSTP014,
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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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[MSTP323] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 23, 0), /* SDHI0 */
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[MSTP322] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 22, 0), /* SDHI1 */
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[MSTP321] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 21, 0), /* SDHI2 */
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[MSTP320] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 20, 0), /* SDHI3 */
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[MSTP120] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 20, MSTPSR1, 0), /* VIN3 */
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[MSTP116] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 16, MSTPSR1, 0), /* PCIe */
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[MSTP115] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 15, MSTPSR1, 0), /* SATA */
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[MSTP114] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 14, MSTPSR1, 0), /* Ether */
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[MSTP110] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 10, MSTPSR1, 0), /* VIN0 */
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[MSTP109] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 9, MSTPSR1, 0), /* VIN1 */
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[MSTP108] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 8, MSTPSR1, 0), /* VIN2 */
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[MSTP103] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 3, MSTPSR1, 0), /* DU */
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[MSTP101] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 1, MSTPSR1, 0), /* USB2 */
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[MSTP100] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 0, MSTPSR1, 0), /* USB0/1 */
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[MSTP030] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 30, 0), /* I2C0 */
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[MSTP029] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 29, 0), /* I2C1 */
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[MSTP028] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 28, 0), /* I2C2 */
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[MSTP027] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 27, 0), /* I2C3 */
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[MSTP026] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 26, 0), /* SCIF0 */
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[MSTP025] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 25, 0), /* SCIF1 */
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[MSTP024] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 24, 0), /* SCIF2 */
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[MSTP023] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 23, 0), /* SCIF3 */
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[MSTP022] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 22, 0), /* SCIF4 */
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[MSTP021] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 21, 0), /* SCIF5 */
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[MSTP016] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 16, 0), /* TMU0 */
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[MSTP015] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 15, 0), /* TMU1 */
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[MSTP014] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 14, 0), /* TMU2 */
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[MSTP007] = SH_CLK_MSTP32(&clks_clk, MSTPCR0, 7, 0), /* HSPI */
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};
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static struct clk_lookup lookups[] = {
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/* main clocks */
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CLKDEV_CON_ID("plla_clk", &plla_clk),
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CLKDEV_CON_ID("clkz_clk", &clkz_clk),
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CLKDEV_CON_ID("clkzs_clk", &clkzs_clk),
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/* DIV4 clocks */
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CLKDEV_CON_ID("shyway_clk", &clks_clk),
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CLKDEV_CON_ID("bus_clk", &clkout_clk),
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CLKDEV_CON_ID("shyway4_clk", &clks4_clk),
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CLKDEV_CON_ID("shyway3_clk", &clks3_clk),
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CLKDEV_CON_ID("shyway1_clk", &clks1_clk),
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CLKDEV_CON_ID("peripheral_clk", &clkp_clk),
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/* MSTP32 clocks */
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CLKDEV_DEV_ID("r8a7779-vin.3", &mstp_clks[MSTP120]), /* VIN3 */
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CLKDEV_DEV_ID("rcar-pcie", &mstp_clks[MSTP116]), /* PCIe */
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CLKDEV_DEV_ID("sata_rcar", &mstp_clks[MSTP115]), /* SATA */
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CLKDEV_DEV_ID("fc600000.sata", &mstp_clks[MSTP115]), /* SATA w/DT */
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CLKDEV_DEV_ID("r8a777x-ether", &mstp_clks[MSTP114]), /* Ether */
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CLKDEV_DEV_ID("r8a7779-vin.0", &mstp_clks[MSTP110]), /* VIN0 */
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CLKDEV_DEV_ID("r8a7779-vin.1", &mstp_clks[MSTP109]), /* VIN1 */
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CLKDEV_DEV_ID("r8a7779-vin.2", &mstp_clks[MSTP108]), /* VIN2 */
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CLKDEV_DEV_ID("ehci-platform.1", &mstp_clks[MSTP101]), /* USB EHCI port2 */
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CLKDEV_DEV_ID("ohci-platform.1", &mstp_clks[MSTP101]), /* USB OHCI port2 */
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CLKDEV_DEV_ID("ehci-platform.0", &mstp_clks[MSTP100]), /* USB EHCI port0/1 */
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CLKDEV_DEV_ID("ohci-platform.0", &mstp_clks[MSTP100]), /* USB OHCI port0/1 */
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CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP016]), /* TMU0 */
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CLKDEV_DEV_ID("i2c-rcar.0", &mstp_clks[MSTP030]), /* I2C0 */
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CLKDEV_DEV_ID("ffc70000.i2c", &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("ffc71000.i2c", &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("ffc72000.i2c", &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("ffc73000.i2c", &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-hspi.0", &mstp_clks[MSTP007]), /* HSPI0 */
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CLKDEV_DEV_ID("fffc7000.spi", &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("fffc8000.spi", &mstp_clks[MSTP007]), /* HSPI1 */
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CLKDEV_DEV_ID("sh-hspi.2", &mstp_clks[MSTP007]), /* HSPI2 */
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CLKDEV_DEV_ID("fffc6000.spi", &mstp_clks[MSTP007]), /* HSPI2 */
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CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP323]), /* SDHI0 */
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CLKDEV_DEV_ID("ffe4c000.sd", &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("ffe4d000.sd", &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("ffe4e000.sd", &mstp_clks[MSTP321]), /* SDHI2 */
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CLKDEV_DEV_ID("sh_mobile_sdhi.3", &mstp_clks[MSTP320]), /* SDHI3 */
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CLKDEV_DEV_ID("ffe4f000.sd", &mstp_clks[MSTP320]), /* SDHI3 */
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CLKDEV_DEV_ID("rcar-du-r8a7779", &mstp_clks[MSTP103]), /* DU */
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};
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void __init r8a7779_clock_init(void)
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{
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u32 mode = r8a7779_read_mode_pins();
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int k, ret = 0;
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if (mode & MD(1)) {
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plla_clk.rate = 1500000000;
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SH_CLK_SET_RATIO(&clkz_clk_ratio, 2, 3);
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SH_CLK_SET_RATIO(&clkzs_clk_ratio, 1, 6);
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SH_CLK_SET_RATIO(&clki_clk_ratio, 1, 2);
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SH_CLK_SET_RATIO(&clks_clk_ratio, 1, 6);
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SH_CLK_SET_RATIO(&clks1_clk_ratio, 1, 12);
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SH_CLK_SET_RATIO(&clks3_clk_ratio, 1, 8);
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SH_CLK_SET_RATIO(&clks4_clk_ratio, 1, 16);
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SH_CLK_SET_RATIO(&clkp_clk_ratio, 1, 24);
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SH_CLK_SET_RATIO(&clkg_clk_ratio, 1, 24);
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if (mode & MD(2)) {
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SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 36);
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SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 36);
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} else {
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SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 24);
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SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 24);
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}
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} else {
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plla_clk.rate = 1600000000;
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SH_CLK_SET_RATIO(&clkz_clk_ratio, 1, 2);
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SH_CLK_SET_RATIO(&clkzs_clk_ratio, 1, 8);
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SH_CLK_SET_RATIO(&clki_clk_ratio, 1, 2);
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SH_CLK_SET_RATIO(&clks_clk_ratio, 1, 8);
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SH_CLK_SET_RATIO(&clks1_clk_ratio, 1, 16);
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SH_CLK_SET_RATIO(&clks3_clk_ratio, 1, 8);
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SH_CLK_SET_RATIO(&clks4_clk_ratio, 1, 16);
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SH_CLK_SET_RATIO(&clkp_clk_ratio, 1, 32);
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SH_CLK_SET_RATIO(&clkg_clk_ratio, 1, 24);
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if (mode & MD(2)) {
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SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 32);
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SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 32);
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} else {
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SH_CLK_SET_RATIO(&clkb_clk_ratio, 1, 24);
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SH_CLK_SET_RATIO(&clkout_clk_ratio, 1, 24);
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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 r8a7779 clocks\n");
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}
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/* do nothing for !CONFIG_SMP or !CONFIG_HAVE_TWD */
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void __init __weak r8a7779_register_twd(void) { }
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void __init r8a7779_earlytimer_init(void)
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{
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r8a7779_clock_init();
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r8a7779_register_twd();
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shmobile_earlytimer_init();
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}
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