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https://github.com/edk2-porting/linux-next.git
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111fad56a8
Add MSTP clock definitions and fix aliases for the two MMCIF and three SDHI interfaces on r8a73a4 (APE6). Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
471 lines
13 KiB
C
471 lines
13 KiB
C
/*
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* r8a73a4 clock framework support
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*
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* Copyright (C) 2013 Renesas Solutions Corp.
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* Copyright (C) 2013 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; 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/kernel.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 CPG_BASE 0xe6150000
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#define CPG_LEN 0x270
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#define SMSTPCR2 0xe6150138
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#define SMSTPCR3 0xe615013c
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#define SMSTPCR5 0xe6150144
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#define FRQCRA 0xE6150000
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#define FRQCRB 0xE6150004
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#define VCLKCR1 0xE6150008
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#define VCLKCR2 0xE615000C
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#define VCLKCR3 0xE615001C
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#define VCLKCR4 0xE6150014
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#define VCLKCR5 0xE6150034
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#define ZBCKCR 0xE6150010
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#define SD0CKCR 0xE6150074
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#define SD1CKCR 0xE6150078
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#define SD2CKCR 0xE615007C
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#define MMC0CKCR 0xE6150240
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#define MMC1CKCR 0xE6150244
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#define FSIACKCR 0xE6150018
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#define FSIBCKCR 0xE6150090
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#define MPCKCR 0xe6150080
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#define SPUVCKCR 0xE6150094
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#define HSICKCR 0xE615026C
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#define M4CKCR 0xE6150098
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#define PLLECR 0xE61500D0
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#define PLL1CR 0xE6150028
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#define PLL2CR 0xE615002C
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#define PLL2SCR 0xE61501F4
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#define PLL2HCR 0xE61501E4
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#define CKSCR 0xE61500C0
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#define CPG_MAP(o) ((o - CPG_BASE) + cpg_mapping.base)
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static struct clk_mapping cpg_mapping = {
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.phys = CPG_BASE,
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.len = CPG_LEN,
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};
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static struct clk extalr_clk = {
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.rate = 32768,
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.mapping = &cpg_mapping,
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};
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static struct clk extal1_clk = {
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.rate = 26000000,
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.mapping = &cpg_mapping,
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};
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static struct clk extal2_clk = {
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.rate = 48000000,
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.mapping = &cpg_mapping,
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};
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static struct sh_clk_ops followparent_clk_ops = {
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.recalc = followparent_recalc,
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};
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static struct clk main_clk = {
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/* .parent will be set r8a73a4_clock_init */
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.ops = &followparent_clk_ops,
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};
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SH_CLK_RATIO(div2, 1, 2);
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SH_CLK_RATIO(div4, 1, 4);
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SH_FIXED_RATIO_CLK(main_div2_clk, main_clk, div2);
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SH_FIXED_RATIO_CLK(extal1_div2_clk, extal1_clk, div2);
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SH_FIXED_RATIO_CLK(extal2_div2_clk, extal2_clk, div2);
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SH_FIXED_RATIO_CLK(extal2_div4_clk, extal2_clk, div4);
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/* External FSIACK/FSIBCK clock */
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static struct clk fsiack_clk = {
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};
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static struct clk fsibck_clk = {
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};
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/*
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* PLL clocks
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*/
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static struct clk *pll_parent_main[] = {
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[0] = &main_clk,
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[1] = &main_div2_clk
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};
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static struct clk *pll_parent_main_extal[8] = {
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[0] = &main_div2_clk,
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[1] = &extal2_div2_clk,
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[3] = &extal2_div4_clk,
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[4] = &main_clk,
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[5] = &extal2_clk,
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};
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static unsigned long pll_recalc(struct clk *clk)
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{
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unsigned long mult = 1;
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if (ioread32(CPG_MAP(PLLECR)) & (1 << clk->enable_bit))
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mult = (((ioread32(clk->mapped_reg) >> 24) & 0x7f) + 1);
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return clk->parent->rate * mult;
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}
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static int pll_set_parent(struct clk *clk, struct clk *parent)
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{
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u32 val;
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int i, ret;
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if (!clk->parent_table || !clk->parent_num)
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return -EINVAL;
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/* Search the parent */
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for (i = 0; i < clk->parent_num; i++)
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if (clk->parent_table[i] == parent)
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break;
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if (i == clk->parent_num)
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return -ENODEV;
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ret = clk_reparent(clk, parent);
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if (ret < 0)
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return ret;
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val = ioread32(clk->mapped_reg) &
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~(((1 << clk->src_width) - 1) << clk->src_shift);
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iowrite32(val | i << clk->src_shift, clk->mapped_reg);
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return 0;
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}
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static struct sh_clk_ops pll_clk_ops = {
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.recalc = pll_recalc,
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.set_parent = pll_set_parent,
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};
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#define PLL_CLOCK(name, p, pt, w, s, reg, e) \
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static struct clk name = { \
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.ops = &pll_clk_ops, \
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.flags = CLK_ENABLE_ON_INIT, \
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.parent = p, \
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.parent_table = pt, \
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.parent_num = ARRAY_SIZE(pt), \
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.src_width = w, \
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.src_shift = s, \
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.enable_reg = (void __iomem *)reg, \
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.enable_bit = e, \
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.mapping = &cpg_mapping, \
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}
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PLL_CLOCK(pll1_clk, &main_clk, pll_parent_main, 1, 7, PLL1CR, 1);
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PLL_CLOCK(pll2_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2CR, 2);
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PLL_CLOCK(pll2s_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2SCR, 4);
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PLL_CLOCK(pll2h_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2HCR, 5);
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SH_FIXED_RATIO_CLK(pll1_div2_clk, pll1_clk, div2);
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static struct clk *main_clks[] = {
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&extalr_clk,
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&extal1_clk,
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&extal1_div2_clk,
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&extal2_clk,
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&extal2_div2_clk,
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&extal2_div4_clk,
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&main_clk,
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&main_div2_clk,
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&fsiack_clk,
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&fsibck_clk,
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&pll1_clk,
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&pll1_div2_clk,
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&pll2_clk,
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&pll2s_clk,
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&pll2h_clk,
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};
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/* DIV4 */
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static void div4_kick(struct clk *clk)
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{
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unsigned long value;
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/* set KICK bit in FRQCRB to update hardware setting */
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value = ioread32(CPG_MAP(FRQCRB));
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value |= (1 << 31);
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iowrite32(value, CPG_MAP(FRQCRB));
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}
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static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18, 24, 0, 36, 48, 10};
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static struct clk_div_mult_table div4_div_mult_table = {
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.divisors = divisors,
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.nr_divisors = ARRAY_SIZE(divisors),
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};
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static struct clk_div4_table div4_table = {
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.div_mult_table = &div4_div_mult_table,
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.kick = div4_kick,
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};
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enum {
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DIV4_I, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2,
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DIV4_ZX, DIV4_ZS, DIV4_HP,
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DIV4_NR };
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static struct clk div4_clks[DIV4_NR] = {
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[DIV4_I] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 20, 0x0dff, CLK_ENABLE_ON_INIT),
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[DIV4_M3] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 12, 0x1dff, CLK_ENABLE_ON_INIT),
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[DIV4_B] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 8, 0x0dff, CLK_ENABLE_ON_INIT),
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[DIV4_M1] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 4, 0x1dff, 0),
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[DIV4_M2] = SH_CLK_DIV4(&pll1_clk, FRQCRA, 0, 0x1dff, 0),
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[DIV4_ZX] = SH_CLK_DIV4(&pll1_clk, FRQCRB, 12, 0x0dff, 0),
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[DIV4_ZS] = SH_CLK_DIV4(&pll1_clk, FRQCRB, 8, 0x0dff, 0),
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[DIV4_HP] = SH_CLK_DIV4(&pll1_clk, FRQCRB, 4, 0x0dff, 0),
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};
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enum {
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DIV6_ZB,
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DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2,
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DIV6_MMC0, DIV6_MMC1,
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DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_VCK4, DIV6_VCK5,
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DIV6_FSIA, DIV6_FSIB,
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DIV6_MP, DIV6_M4, DIV6_HSI, DIV6_SPUV,
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DIV6_NR };
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static struct clk *div6_parents[8] = {
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[0] = &pll1_div2_clk,
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[1] = &pll2s_clk,
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[3] = &extal2_clk,
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[4] = &main_div2_clk,
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[6] = &extalr_clk,
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};
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static struct clk *fsia_parents[4] = {
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[0] = &pll1_div2_clk,
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[1] = &pll2s_clk,
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[2] = &fsiack_clk,
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};
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static struct clk *fsib_parents[4] = {
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[0] = &pll1_div2_clk,
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[1] = &pll2s_clk,
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[2] = &fsibck_clk,
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};
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static struct clk *mp_parents[4] = {
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[0] = &pll1_div2_clk,
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[1] = &pll2s_clk,
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[2] = &extal2_clk,
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[3] = &extal2_clk,
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};
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static struct clk *m4_parents[2] = {
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[0] = &pll2s_clk,
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};
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static struct clk *hsi_parents[4] = {
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[0] = &pll2h_clk,
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[1] = &pll1_div2_clk,
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[3] = &pll2s_clk,
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};
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/*** FIXME ***
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* SH_CLK_DIV6_EXT() macro doesn't care .mapping
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* but, it is necessary on R-Car (= ioremap() base CPG)
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* The difference between
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* SH_CLK_DIV6_EXT() <--> SH_CLK_MAP_DIV6_EXT()
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* is only .mapping
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*/
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#define SH_CLK_MAP_DIV6_EXT(_reg, _flags, _parents, \
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_num_parents, _src_shift, _src_width) \
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{ \
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.enable_reg = (void __iomem *)_reg, \
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.enable_bit = 0, /* unused */ \
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.flags = _flags | CLK_MASK_DIV_ON_DISABLE, \
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.div_mask = SH_CLK_DIV6_MSK, \
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.parent_table = _parents, \
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.parent_num = _num_parents, \
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.src_shift = _src_shift, \
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.src_width = _src_width, \
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.mapping = &cpg_mapping, \
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}
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static struct clk div6_clks[DIV6_NR] = {
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[DIV6_ZB] = SH_CLK_MAP_DIV6_EXT(ZBCKCR, CLK_ENABLE_ON_INIT,
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div6_parents, 2, 7, 1),
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[DIV6_SDHI0] = SH_CLK_MAP_DIV6_EXT(SD0CKCR, 0,
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div6_parents, 2, 6, 2),
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[DIV6_SDHI1] = SH_CLK_MAP_DIV6_EXT(SD1CKCR, 0,
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div6_parents, 2, 6, 2),
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[DIV6_SDHI2] = SH_CLK_MAP_DIV6_EXT(SD2CKCR, 0,
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div6_parents, 2, 6, 2),
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[DIV6_MMC0] = SH_CLK_MAP_DIV6_EXT(MMC0CKCR, 0,
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div6_parents, 2, 6, 2),
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[DIV6_MMC1] = SH_CLK_MAP_DIV6_EXT(MMC1CKCR, 0,
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div6_parents, 2, 6, 2),
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[DIV6_VCK1] = SH_CLK_MAP_DIV6_EXT(VCLKCR1, 0, /* didn't care bit[6-7] */
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div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
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[DIV6_VCK2] = SH_CLK_MAP_DIV6_EXT(VCLKCR2, 0, /* didn't care bit[6-7] */
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div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
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[DIV6_VCK3] = SH_CLK_MAP_DIV6_EXT(VCLKCR3, 0, /* didn't care bit[6-7] */
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div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
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[DIV6_VCK4] = SH_CLK_MAP_DIV6_EXT(VCLKCR4, 0, /* didn't care bit[6-7] */
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div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
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[DIV6_VCK5] = SH_CLK_MAP_DIV6_EXT(VCLKCR5, 0, /* didn't care bit[6-7] */
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div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
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[DIV6_FSIA] = SH_CLK_MAP_DIV6_EXT(FSIACKCR, 0,
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fsia_parents, ARRAY_SIZE(fsia_parents), 6, 2),
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[DIV6_FSIB] = SH_CLK_MAP_DIV6_EXT(FSIBCKCR, 0,
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fsib_parents, ARRAY_SIZE(fsib_parents), 6, 2),
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[DIV6_MP] = SH_CLK_MAP_DIV6_EXT(MPCKCR, 0, /* it needs bit[9-11] control */
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mp_parents, ARRAY_SIZE(mp_parents), 6, 2),
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/* pll2s will be selected always for M4 */
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[DIV6_M4] = SH_CLK_MAP_DIV6_EXT(M4CKCR, 0, /* it needs bit[9] control */
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m4_parents, ARRAY_SIZE(m4_parents), 6, 1),
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[DIV6_HSI] = SH_CLK_MAP_DIV6_EXT(HSICKCR, 0, /* it needs bit[9] control */
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hsi_parents, ARRAY_SIZE(hsi_parents), 6, 2),
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[DIV6_SPUV] = SH_CLK_MAP_DIV6_EXT(SPUVCKCR, 0,
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mp_parents, ARRAY_SIZE(mp_parents), 6, 2),
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};
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/* MSTP */
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enum {
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MSTP217, MSTP216, MSTP207, MSTP206, MSTP204, MSTP203,
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MSTP315, MSTP314, MSTP313, MSTP312, MSTP305,
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MSTP522,
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MSTP_NR
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};
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static struct clk mstp_clks[MSTP_NR] = {
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[MSTP204] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 4, 0), /* SCIFA0 */
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[MSTP203] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 3, 0), /* SCIFA1 */
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[MSTP206] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 6, 0), /* SCIFB0 */
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[MSTP207] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 7, 0), /* SCIFB1 */
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[MSTP216] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 16, 0), /* SCIFB2 */
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[MSTP217] = SH_CLK_MSTP32(&div6_clks[DIV6_MP], SMSTPCR2, 17, 0), /* SCIFB3 */
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[MSTP305] = SH_CLK_MSTP32(&div6_clks[DIV6_MMC1],SMSTPCR3, 5, 0), /* MMCIF1 */
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[MSTP312] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI2],SMSTPCR3, 12, 0), /* SDHI2 */
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[MSTP313] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI1],SMSTPCR3, 13, 0), /* SDHI1 */
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[MSTP314] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI0],SMSTPCR3, 14, 0), /* SDHI0 */
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[MSTP315] = SH_CLK_MSTP32(&div6_clks[DIV6_MMC0],SMSTPCR3, 15, 0), /* MMCIF0 */
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[MSTP522] = SH_CLK_MSTP32(&extal2_clk, SMSTPCR5, 22, 0), /* Thermal */
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};
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static struct clk_lookup lookups[] = {
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/* main clock */
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CLKDEV_CON_ID("extal1", &extal1_clk),
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CLKDEV_CON_ID("extal1_div2", &extal1_div2_clk),
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CLKDEV_CON_ID("extal2", &extal2_clk),
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CLKDEV_CON_ID("extal2_div2", &extal2_div2_clk),
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CLKDEV_CON_ID("extal2_div4", &extal2_div4_clk),
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CLKDEV_CON_ID("fsiack", &fsiack_clk),
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CLKDEV_CON_ID("fsibck", &fsibck_clk),
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/* pll clock */
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CLKDEV_CON_ID("pll1", &pll1_clk),
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CLKDEV_CON_ID("pll1_div2", &pll1_div2_clk),
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CLKDEV_CON_ID("pll2", &pll2_clk),
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CLKDEV_CON_ID("pll2s", &pll2s_clk),
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CLKDEV_CON_ID("pll2h", &pll2h_clk),
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/* DIV6 */
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CLKDEV_CON_ID("zb", &div6_clks[DIV6_ZB]),
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CLKDEV_CON_ID("vck1", &div6_clks[DIV6_VCK1]),
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CLKDEV_CON_ID("vck2", &div6_clks[DIV6_VCK2]),
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CLKDEV_CON_ID("vck3", &div6_clks[DIV6_VCK3]),
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CLKDEV_CON_ID("vck4", &div6_clks[DIV6_VCK4]),
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CLKDEV_CON_ID("vck5", &div6_clks[DIV6_VCK5]),
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CLKDEV_CON_ID("fsia", &div6_clks[DIV6_FSIA]),
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CLKDEV_CON_ID("fsib", &div6_clks[DIV6_FSIB]),
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CLKDEV_CON_ID("mp", &div6_clks[DIV6_MP]),
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CLKDEV_CON_ID("m4", &div6_clks[DIV6_M4]),
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CLKDEV_CON_ID("hsi", &div6_clks[DIV6_HSI]),
|
|
CLKDEV_CON_ID("spuv", &div6_clks[DIV6_SPUV]),
|
|
|
|
/* MSTP */
|
|
CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]),
|
|
CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]),
|
|
CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]),
|
|
CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]),
|
|
CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]),
|
|
CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP217]),
|
|
CLKDEV_DEV_ID("rcar_thermal", &mstp_clks[MSTP522]),
|
|
CLKDEV_DEV_ID("sh_mmcif.1", &mstp_clks[MSTP305]),
|
|
CLKDEV_DEV_ID("ee220000.mmcif", &mstp_clks[MSTP305]),
|
|
CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP312]),
|
|
CLKDEV_DEV_ID("ee140000.sdhi", &mstp_clks[MSTP312]),
|
|
CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP313]),
|
|
CLKDEV_DEV_ID("ee120000.sdhi", &mstp_clks[MSTP313]),
|
|
CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP314]),
|
|
CLKDEV_DEV_ID("ee100000.sdhi", &mstp_clks[MSTP314]),
|
|
CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP315]),
|
|
CLKDEV_DEV_ID("ee200000.mmcif", &mstp_clks[MSTP315]),
|
|
|
|
/* for DT */
|
|
CLKDEV_DEV_ID("e61f0000.thermal", &mstp_clks[MSTP522]),
|
|
};
|
|
|
|
void __init r8a73a4_clock_init(void)
|
|
{
|
|
void __iomem *reg;
|
|
int k, ret = 0;
|
|
u32 ckscr;
|
|
|
|
reg = ioremap_nocache(CKSCR, PAGE_SIZE);
|
|
BUG_ON(!reg);
|
|
ckscr = ioread32(reg);
|
|
iounmap(reg);
|
|
|
|
switch ((ckscr >> 28) & 0x3) {
|
|
case 0:
|
|
main_clk.parent = &extal1_clk;
|
|
break;
|
|
case 1:
|
|
main_clk.parent = &extal1_div2_clk;
|
|
break;
|
|
case 2:
|
|
main_clk.parent = &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_reparent_register(div6_clks, DIV6_NR);
|
|
|
|
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 r8a73a4 clocks\n");
|
|
}
|