LXR linux/arch/sh/kernel/cpu/sh4a/clock-sh7734.c

   1/*
   2 * arch/sh/kernel/cpu/sh4a/clock-sh7734.c
   3 *
   4 * Clock framework for SH7734
   5 *
   6 * Copyright (C) 2011, 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
   7 * Copyright (C) 2011, 2012 Renesas Solutions Corp.
   8 *
   9 * This file is subject to the terms and conditions of the GNU General Public
  10 * License.  See the file "COPYING" in the main directory of this archive
  11 * for more details.
  12 */
  13
  14#include <linux/init.h>
  15#include <linux/kernel.h>
  16#include <linux/io.h>
  17#include <linux/clkdev.h>
  18#include <linux/delay.h>
  19#include <asm/clock.h>
  20#include <asm/freq.h>
  21
  22static struct clk extal_clk = {
  23        .rate       = 33333333,
  24};
  25
  26#define MODEMR          (0xFFCC0020)
  27#define MODEMR_MASK     (0x6)
  28#define MODEMR_533MHZ   (0x2)
  29
  30static unsigned long pll_recalc(struct clk *clk)
  31{
  32        int mode = 12;
  33        u32 r = __raw_readl(MODEMR);
  34
  35        if ((r & MODEMR_MASK) & MODEMR_533MHZ)
  36                mode = 16;
  37
  38        return clk->parent->rate * mode;
  39}
  40
  41static struct sh_clk_ops pll_clk_ops = {
  42        .recalc         = pll_recalc,
  43};
  44
  45static struct clk pll_clk = {
  46        .ops        = &pll_clk_ops,
  47        .parent     = &extal_clk,
  48        .flags      = CLK_ENABLE_ON_INIT,
  49};
  50
  51static struct clk *main_clks[] = {
  52        &extal_clk,
  53        &pll_clk,
  54};
  55
  56static int multipliers[] = { 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
  57static int divisors[] = { 1, 3, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24 };
  58
  59static struct clk_div_mult_table div4_div_mult_table = {
  60        .divisors = divisors,
  61        .nr_divisors = ARRAY_SIZE(divisors),
  62        .multipliers = multipliers,
  63        .nr_multipliers = ARRAY_SIZE(multipliers),
  64};
  65
  66static struct clk_div4_table div4_table = {
  67        .div_mult_table = &div4_div_mult_table,
  68};
  69
  70enum { DIV4_I, DIV4_S, DIV4_B, DIV4_M, DIV4_S1, DIV4_P, DIV4_NR };
  71
  72#define DIV4(_reg, _bit, _mask, _flags) \
  73        SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
  74
  75struct clk div4_clks[DIV4_NR] = {
  76        [DIV4_I] = DIV4(FRQMR1, 28, 0x0003, CLK_ENABLE_ON_INIT),
  77        [DIV4_S] = DIV4(FRQMR1, 20, 0x000C, CLK_ENABLE_ON_INIT),
  78        [DIV4_B] = DIV4(FRQMR1, 16, 0x0140, CLK_ENABLE_ON_INIT),
  79        [DIV4_M] = DIV4(FRQMR1, 12, 0x0004, CLK_ENABLE_ON_INIT),
  80        [DIV4_S1] = DIV4(FRQMR1, 4, 0x0030, CLK_ENABLE_ON_INIT),
  81        [DIV4_P] = DIV4(FRQMR1, 0, 0x0140, CLK_ENABLE_ON_INIT),
  82};
  83
  84#define MSTPCR0 0xFFC80030
  85#define MSTPCR1 0xFFC80034
  86#define MSTPCR3 0xFFC8003C
  87
  88enum {
  89        MSTP030, MSTP029, /* IIC */
  90        MSTP026, MSTP025, MSTP024, /* SCIF */
  91        MSTP023,
  92        MSTP022, MSTP021,
  93        MSTP019, /* HSCIF */
  94        MSTP016, MSTP015, MSTP014, /* TMU / TIMER */
  95        MSTP012, MSTP011, MSTP010, MSTP009, MSTP008, /* SSI */
  96        MSTP007, /* HSPI */
  97        MSTP115, /* ADMAC */
  98        MSTP114, /* GETHER */
  99        MSTP111, /* DMAC */
 100        MSTP109, /* VIDEOIN1 */
 101        MSTP108, /* VIDEOIN0 */
 102        MSTP107, /* RGPVBG */
 103        MSTP106, /* 2DG */
 104        MSTP103, /* VIEW */
 105        MSTP100, /* USB */
 106        MSTP331, /* MMC */
 107        MSTP330, /* MIMLB */
 108        MSTP323, /* SDHI0 */
 109        MSTP322, /* SDHI1 */
 110        MSTP321, /* SDHI2 */
 111        MSTP320, /* RQSPI */
 112        MSTP319, /* SRC0 */
 113        MSTP318, /* SRC1 */
 114        MSTP317, /* RSPI */
 115        MSTP316, /* RCAN0 */
 116        MSTP315, /* RCAN1 */
 117        MSTP314, /* FLTCL */
 118        MSTP313, /* ADC */
 119        MSTP312, /* MTU */
 120        MSTP304, /* IE-BUS */
 121        MSTP303, /* RTC */
 122        MSTP302, /* HIF */
 123        MSTP301, /* STIF0 */
 124        MSTP300, /* STIF1 */
 125        MSTP_NR };
 126
 127static struct clk mstp_clks[MSTP_NR] = {
 128        /* MSTPCR0 */
 129        [MSTP030] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 30, 0),
 130        [MSTP029] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 29, 0),
 131        [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0),
 132        [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0),
 133        [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0),
 134        [MSTP023] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 23, 0),
 135        [MSTP022] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, 0),
 136        [MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0),
 137        [MSTP019] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 19, 0),
 138        [MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0),
 139        [MSTP015] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0),
 140        [MSTP014] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 14, 0),
 141        [MSTP012] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 12, 0),
 142        [MSTP011] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 11, 0),
 143        [MSTP010] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0),
 144        [MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0),
 145        [MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0),
 146        [MSTP007] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 7, 0),
 147
 148        /* MSTPCR1 */
 149        [MSTP115] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 15, 0),
 150        [MSTP114] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 14, 0),
 151        [MSTP111] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 11, 0),
 152        [MSTP109] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 9, 0),
 153        [MSTP108] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 8, 0),
 154        [MSTP107] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 7, 0),
 155        [MSTP106] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 6, 0),
 156        [MSTP103] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 3, 0),
 157        [MSTP100] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 0, 0),
 158
 159        /* MSTPCR3 */
 160        [MSTP331] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 31, 0),
 161        [MSTP330] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 30, 0),
 162        [MSTP323] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 23, 0),
 163        [MSTP322] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 22, 0),
 164        [MSTP321] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 21, 0),
 165        [MSTP320] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 20, 0),
 166        [MSTP319] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 19, 0),
 167        [MSTP318] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 18, 0),
 168        [MSTP317] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 17, 0),
 169        [MSTP316] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 16, 0),
 170        [MSTP315] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 15, 0),
 171        [MSTP314] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 14, 0),
 172        [MSTP313] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 13, 0),
 173        [MSTP312] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 12, 0),
 174        [MSTP304] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  4, 0),
 175        [MSTP303] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  3, 0),
 176        [MSTP302] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  2, 0),
 177        [MSTP301] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  1, 0),
 178        [MSTP300] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  0, 0),
 179};
 180
 181static struct clk_lookup lookups[] = {
 182        /* main clocks */
 183        CLKDEV_CON_ID("extal", &extal_clk),
 184        CLKDEV_CON_ID("pll_clk", &pll_clk),
 185
 186        /* clocks */
 187        CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
 188        CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_S]),
 189        CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_M]),
 190        CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
 191        CLKDEV_CON_ID("shyway_clk1", &div4_clks[DIV4_S1]),
 192        CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
 193
 194        /* MSTP32 clocks */
 195        CLKDEV_DEV_ID("i2c-sh7734.0", &mstp_clks[MSTP030]),
 196        CLKDEV_DEV_ID("i2c-sh7734.1", &mstp_clks[MSTP029]),
 197        CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP026]),
 198        CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP025]),
 199        CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP024]),
 200        CLKDEV_ICK_ID("sci_fck", "sh-sci.3", &mstp_clks[MSTP023]),
 201        CLKDEV_ICK_ID("sci_fck", "sh-sci.4", &mstp_clks[MSTP022]),
 202        CLKDEV_ICK_ID("sci_fck", "sh-sci.5", &mstp_clks[MSTP021]),
 203        CLKDEV_CON_ID("hscif", &mstp_clks[MSTP019]),
 204        CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP016]),
 205        CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP015]),
 206        CLKDEV_ICK_ID("fck", "sh-tmu.2", &mstp_clks[MSTP014]),
 207        CLKDEV_CON_ID("ssi0", &mstp_clks[MSTP012]),
 208        CLKDEV_CON_ID("ssi1", &mstp_clks[MSTP011]),
 209        CLKDEV_CON_ID("ssi2", &mstp_clks[MSTP010]),
 210        CLKDEV_CON_ID("ssi3", &mstp_clks[MSTP009]),
 211        CLKDEV_CON_ID("sss", &mstp_clks[MSTP008]),
 212        CLKDEV_CON_ID("hspi", &mstp_clks[MSTP007]),
 213        CLKDEV_CON_ID("usb_fck", &mstp_clks[MSTP100]),
 214        CLKDEV_CON_ID("videoin0", &mstp_clks[MSTP109]),
 215        CLKDEV_CON_ID("videoin1", &mstp_clks[MSTP108]),
 216        CLKDEV_CON_ID("rgpvg", &mstp_clks[MSTP107]),
 217        CLKDEV_CON_ID("2dg", &mstp_clks[MSTP106]),
 218        CLKDEV_CON_ID("view", &mstp_clks[MSTP103]),
 219
 220        CLKDEV_CON_ID("mmc0", &mstp_clks[MSTP331]),
 221        CLKDEV_CON_ID("mimlb0", &mstp_clks[MSTP330]),
 222        CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP323]),
 223        CLKDEV_CON_ID("sdhi1", &mstp_clks[MSTP322]),
 224        CLKDEV_CON_ID("sdhi2", &mstp_clks[MSTP321]),
 225        CLKDEV_CON_ID("rqspi0", &mstp_clks[MSTP320]),
 226        CLKDEV_CON_ID("src0", &mstp_clks[MSTP319]),
 227        CLKDEV_CON_ID("src1", &mstp_clks[MSTP318]),
 228        CLKDEV_CON_ID("rsp0", &mstp_clks[MSTP317]),
 229        CLKDEV_CON_ID("rcan0", &mstp_clks[MSTP316]),
 230        CLKDEV_CON_ID("rcan1", &mstp_clks[MSTP315]),
 231        CLKDEV_CON_ID("fltcl0", &mstp_clks[MSTP314]),
 232        CLKDEV_CON_ID("adc0", &mstp_clks[MSTP313]),
 233        CLKDEV_CON_ID("mtu0", &mstp_clks[MSTP312]),
 234        CLKDEV_CON_ID("iebus0", &mstp_clks[MSTP304]),
 235        CLKDEV_DEV_ID("sh7734-gether.0", &mstp_clks[MSTP114]),
 236        CLKDEV_CON_ID("rtc0", &mstp_clks[MSTP303]),
 237        CLKDEV_CON_ID("hif0", &mstp_clks[MSTP302]),
 238        CLKDEV_CON_ID("stif0", &mstp_clks[MSTP301]),
 239        CLKDEV_CON_ID("stif1", &mstp_clks[MSTP300]),
 240};
 241
 242int __init arch_clk_init(void)
 243{
 244        int i, ret = 0;
 245
 246        for (i = 0; i < ARRAY_SIZE(main_clks); i++)
 247                ret |= clk_register(main_clks[i]);
 248
 249        clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 250
 251        if (!ret)
 252                ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
 253                        &div4_table);
 254
 255        if (!ret)
 256                ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
 257
 258        return ret;
 259}
 260