--- /dev/null
+/*
+ * sh73a0 clock framework support
+ *
+ * Copyright (C) 2010 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/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/sh_clk.h>
+#include <linux/clkdev.h>
+#include <mach/common.h>
+
+#define FRQCRA 0xe6150000
+#define FRQCRB 0xe6150004
+#define FRQCRD 0xe61500e4
+#define VCLKCR1 0xe6150008
+#define VCLKCR2 0xe615000C
+#define VCLKCR3 0xe615001C
+#define ZBCKCR 0xe6150010
+#define FLCKCR 0xe6150014
+#define SD0CKCR 0xe6150074
+#define SD1CKCR 0xe6150078
+#define SD2CKCR 0xe615007C
+#define FSIACKCR 0xe6150018
+#define FSIBCKCR 0xe6150090
+#define SUBCKCR 0xe6150080
+#define SPUACKCR 0xe6150084
+#define SPUVCKCR 0xe6150094
+#define MSUCKCR 0xe6150088
+#define HSICKCR 0xe615008C
+#define MFCK1CR 0xe6150098
+#define MFCK2CR 0xe615009C
+#define DSITCKCR 0xe6150060
+#define DSI0PCKCR 0xe6150064
+#define DSI1PCKCR 0xe6150068
+#define DSI0PHYCR 0xe615006C
+#define DSI1PHYCR 0xe6150070
+#define PLLECR 0xe61500d0
+#define PLL0CR 0xe61500d8
+#define PLL1CR 0xe6150028
+#define PLL2CR 0xe615002c
+#define PLL3CR 0xe61500dc
+#define SMSTPCR0 0xe6150130
+#define SMSTPCR1 0xe6150134
+#define SMSTPCR2 0xe6150138
+#define SMSTPCR3 0xe615013c
+#define SMSTPCR4 0xe6150140
+#define SMSTPCR5 0xe6150144
+#define CKSCR 0xe61500c0
+
+/* Fixed 32 KHz root clock from EXTALR pin */
+static struct clk r_clk = {
+ .rate = 32768,
+};
+
+/*
+ * 26MHz default rate for the EXTAL1 root input clock.
+ * If needed, reset this with clk_set_rate() from the platform code.
+ */
+struct clk sh73a0_extal1_clk = {
+ .rate = 26000000,
+};
+
+/*
+ * 48MHz default rate for the EXTAL2 root input clock.
+ * If needed, reset this with clk_set_rate() from the platform code.
+ */
+struct clk sh73a0_extal2_clk = {
+ .rate = 48000000,
+};
+
+/* A fixed divide-by-2 block */
+static unsigned long div2_recalc(struct clk *clk)
+{
+ return clk->parent->rate / 2;
+}
+
+static struct clk_ops div2_clk_ops = {
+ .recalc = div2_recalc,
+};
+
+/* Divide extal1 by two */
+static struct clk extal1_div2_clk = {
+ .ops = &div2_clk_ops,
+ .parent = &sh73a0_extal1_clk,
+};
+
+/* Divide extal2 by two */
+static struct clk extal2_div2_clk = {
+ .ops = &div2_clk_ops,
+ .parent = &sh73a0_extal2_clk,
+};
+
+static struct clk_ops main_clk_ops = {
+ .recalc = followparent_recalc,
+};
+
+/* Main clock */
+static struct clk main_clk = {
+ .ops = &main_clk_ops,
+};
+
+/* PLL0, PLL1, PLL2, PLL3 */
+static unsigned long pll_recalc(struct clk *clk)
+{
+ unsigned long mult = 1;
+
+ if (__raw_readl(PLLECR) & (1 << clk->enable_bit)) {
+ mult = (((__raw_readl(clk->enable_reg) >> 24) & 0x3f) + 1);
+ /* handle CFG bit for PLL1 and PLL2 */
+ switch (clk->enable_bit) {
+ case 1:
+ case 2:
+ if (__raw_readl(clk->enable_reg) & (1 << 20))
+ mult *= 2;
+ }
+ }
+
+ return clk->parent->rate * mult;
+}
+
+static struct clk_ops pll_clk_ops = {
+ .recalc = pll_recalc,
+};
+
+static struct clk pll0_clk = {
+ .ops = &pll_clk_ops,
+ .flags = CLK_ENABLE_ON_INIT,
+ .parent = &main_clk,
+ .enable_reg = (void __iomem *)PLL0CR,
+ .enable_bit = 0,
+};
+
+static struct clk pll1_clk = {
+ .ops = &pll_clk_ops,
+ .flags = CLK_ENABLE_ON_INIT,
+ .parent = &main_clk,
+ .enable_reg = (void __iomem *)PLL1CR,
+ .enable_bit = 1,
+};
+
+static struct clk pll2_clk = {
+ .ops = &pll_clk_ops,
+ .flags = CLK_ENABLE_ON_INIT,
+ .parent = &main_clk,
+ .enable_reg = (void __iomem *)PLL2CR,
+ .enable_bit = 2,
+};
+
+static struct clk pll3_clk = {
+ .ops = &pll_clk_ops,
+ .flags = CLK_ENABLE_ON_INIT,
+ .parent = &main_clk,
+ .enable_reg = (void __iomem *)PLL3CR,
+ .enable_bit = 3,
+};
+
+/* Divide PLL1 by two */
+static struct clk pll1_div2_clk = {
+ .ops = &div2_clk_ops,
+ .parent = &pll1_clk,
+};
+
+static struct clk *main_clks[] = {
+ &r_clk,
+ &sh73a0_extal1_clk,
+ &sh73a0_extal2_clk,
+ &extal1_div2_clk,
+ &extal2_div2_clk,
+ &main_clk,
+ &pll0_clk,
+ &pll1_clk,
+ &pll2_clk,
+ &pll3_clk,
+ &pll1_div2_clk,
+};
+
+static void div4_kick(struct clk *clk)
+{
+ unsigned long value;
+
+ /* set KICK bit in FRQCRB to update hardware setting */
+ value = __raw_readl(FRQCRB);
+ value |= (1 << 31);
+ __raw_writel(value, FRQCRB);
+}
+
+static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18,
+ 24, 0, 36, 48, 7 };
+
+static struct clk_div_mult_table div4_div_mult_table = {
+ .divisors = divisors,
+ .nr_divisors = ARRAY_SIZE(divisors),
+};
+
+static struct clk_div4_table div4_table = {
+ .div_mult_table = &div4_div_mult_table,
+ .kick = div4_kick,
+};
+
+enum { DIV4_I, DIV4_ZG, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2,
+ DIV4_Z, DIV4_ZTR, DIV4_ZT, DIV4_ZX, DIV4_HP, DIV4_NR };
+
+#define DIV4(_reg, _bit, _mask, _flags) \
+ SH_CLK_DIV4(&pll1_clk, _reg, _bit, _mask, _flags)
+
+static struct clk div4_clks[DIV4_NR] = {
+ [DIV4_I] = DIV4(FRQCRA, 20, 0xfff, CLK_ENABLE_ON_INIT),
+ [DIV4_ZG] = DIV4(FRQCRA, 16, 0xbff, CLK_ENABLE_ON_INIT),
+ [DIV4_M3] = DIV4(FRQCRA, 12, 0xfff, CLK_ENABLE_ON_INIT),
+ [DIV4_B] = DIV4(FRQCRA, 8, 0xfff, CLK_ENABLE_ON_INIT),
+ [DIV4_M1] = DIV4(FRQCRA, 4, 0xfff, 0),
+ [DIV4_M2] = DIV4(FRQCRA, 0, 0xfff, 0),
+ [DIV4_Z] = DIV4(FRQCRB, 24, 0xbff, 0),
+ [DIV4_ZTR] = DIV4(FRQCRB, 20, 0xfff, 0),
+ [DIV4_ZT] = DIV4(FRQCRB, 16, 0xfff, 0),
+ [DIV4_ZX] = DIV4(FRQCRB, 12, 0xfff, 0),
+ [DIV4_HP] = DIV4(FRQCRB, 4, 0xfff, 0),
+};
+
+enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_ZB1,
+ DIV6_FLCTL, DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2,
+ DIV6_FSIA, DIV6_FSIB, DIV6_SUB,
+ DIV6_SPUA, DIV6_SPUV, DIV6_MSU,
+ DIV6_HSI, DIV6_MFG1, DIV6_MFG2,
+ DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P,
+ DIV6_NR };
+
+static struct clk div6_clks[DIV6_NR] = {
+ [DIV6_VCK1] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR1, 0),
+ [DIV6_VCK2] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR2, 0),
+ [DIV6_VCK3] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR3, 0),
+ [DIV6_ZB1] = SH_CLK_DIV6(&pll1_div2_clk, ZBCKCR, 0),
+ [DIV6_FLCTL] = SH_CLK_DIV6(&pll1_div2_clk, FLCKCR, 0),
+ [DIV6_SDHI0] = SH_CLK_DIV6(&pll1_div2_clk, SD0CKCR, 0),
+ [DIV6_SDHI1] = SH_CLK_DIV6(&pll1_div2_clk, SD1CKCR, 0),
+ [DIV6_SDHI2] = SH_CLK_DIV6(&pll1_div2_clk, SD2CKCR, 0),
+ [DIV6_FSIA] = SH_CLK_DIV6(&pll1_div2_clk, FSIACKCR, 0),
+ [DIV6_FSIB] = SH_CLK_DIV6(&pll1_div2_clk, FSIBCKCR, 0),
+ [DIV6_SUB] = SH_CLK_DIV6(&sh73a0_extal2_clk, SUBCKCR, 0),
+ [DIV6_SPUA] = SH_CLK_DIV6(&pll1_div2_clk, SPUACKCR, 0),
+ [DIV6_SPUV] = SH_CLK_DIV6(&pll1_div2_clk, SPUVCKCR, 0),
+ [DIV6_MSU] = SH_CLK_DIV6(&pll1_div2_clk, MSUCKCR, 0),
+ [DIV6_HSI] = SH_CLK_DIV6(&pll1_div2_clk, HSICKCR, 0),
+ [DIV6_MFG1] = SH_CLK_DIV6(&pll1_div2_clk, MFCK1CR, 0),
+ [DIV6_MFG2] = SH_CLK_DIV6(&pll1_div2_clk, MFCK2CR, 0),
+ [DIV6_DSIT] = SH_CLK_DIV6(&pll1_div2_clk, DSITCKCR, 0),
+ [DIV6_DSI0P] = SH_CLK_DIV6(&pll1_div2_clk, DSI0PCKCR, 0),
+ [DIV6_DSI1P] = SH_CLK_DIV6(&pll1_div2_clk, DSI1PCKCR, 0),
+};
+
+enum { MSTP001,
+ MSTP129, MSTP128, MSTP127, MSTP126, MSTP125, MSTP118, MSTP116, MSTP100,
+ MSTP219,
+ MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
+ MSTP331, MSTP329, MSTP325, MSTP323, MSTP312,
+ MSTP411, MSTP410, MSTP403,
+ MSTP_NR };
+
+#define MSTP(_parent, _reg, _bit, _flags) \
+ SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
+
+static struct clk mstp_clks[MSTP_NR] = {
+ [MSTP001] = MSTP(&div4_clks[DIV4_HP], SMSTPCR0, 1, 0), /* IIC2 */
+ [MSTP129] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 29, 0), /* CEU1 */
+ [MSTP128] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 28, 0), /* CSI2-RX1 */
+ [MSTP127] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 27, 0), /* CEU0 */
+ [MSTP126] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 26, 0), /* CSI2-RX0 */
+ [MSTP125] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR1, 25, 0), /* TMU0 */
+ [MSTP118] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 18, 0), /* DSITX0 */
+ [MSTP116] = MSTP(&div4_clks[DIV4_HP], SMSTPCR1, 16, 0), /* IIC0 */
+ [MSTP100] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 0, 0), /* LCDC0 */
+ [MSTP219] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 19, 0), /* SCIFA7 */
+ [MSTP207] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 7, 0), /* SCIFA5 */
+ [MSTP206] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 6, 0), /* SCIFB */
+ [MSTP204] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 4, 0), /* SCIFA0 */
+ [MSTP203] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 3, 0), /* SCIFA1 */
+ [MSTP202] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 2, 0), /* SCIFA2 */
+ [MSTP201] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 1, 0), /* SCIFA3 */
+ [MSTP200] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 0, 0), /* SCIFA4 */
+ [MSTP331] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 31, 0), /* SCIFA6 */
+ [MSTP329] = MSTP(&r_clk, SMSTPCR3, 29, 0), /* CMT10 */
+ [MSTP325] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 25, 0), /* IrDA */
+ [MSTP323] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 23, 0), /* IIC1 */
+ [MSTP312] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 12, 0), /* MMCIF0 */
+ [MSTP411] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 11, 0), /* IIC3 */
+ [MSTP410] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 10, 0), /* IIC4 */
+ [MSTP403] = MSTP(&r_clk, SMSTPCR4, 3, 0), /* KEYSC */
+};
+
+#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
+#define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
+#define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
+
+static struct clk_lookup lookups[] = {
+ /* main clocks */
+ CLKDEV_CON_ID("r_clk", &r_clk),
+
+ /* DIV6 clocks */
+ CLKDEV_CON_ID("vck1_clk", &div6_clks[DIV6_VCK1]),
+ CLKDEV_CON_ID("vck2_clk", &div6_clks[DIV6_VCK2]),
+ CLKDEV_CON_ID("vck3_clk", &div6_clks[DIV6_VCK3]),
+ CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSIT]),
+ CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSIT]),
+ CLKDEV_ICK_ID("dsi0p_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSI0P]),
+ CLKDEV_ICK_ID("dsi1p_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSI1P]),
+
+ /* MSTP32 clocks */
+ CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[MSTP001]), /* I2C2 */
+ CLKDEV_DEV_ID("sh_mobile_ceu.1", &mstp_clks[MSTP129]), /* CEU1 */
+ CLKDEV_DEV_ID("sh-mobile-csi2.1", &mstp_clks[MSTP128]), /* CSI2-RX1 */
+ CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[MSTP127]), /* CEU0 */
+ CLKDEV_DEV_ID("sh-mobile-csi2.0", &mstp_clks[MSTP126]), /* CSI2-RX0 */
+ CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */
+ CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */
+ CLKDEV_DEV_ID("sh-mipi-dsi.0", &mstp_clks[MSTP118]), /* DSITX */
+ CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */
+ CLKDEV_DEV_ID("sh_mobile_lcdc_fb.0", &mstp_clks[MSTP100]), /* LCDC0 */
+ CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP219]), /* SCIFA7 */
+ CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP207]), /* SCIFA5 */
+ CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP206]), /* SCIFB */
+ CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */
+ CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */
+ CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP202]), /* SCIFA2 */
+ CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP201]), /* SCIFA3 */
+ CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */
+ CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */
+ CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */
+ CLKDEV_DEV_ID("sh_irda.0", &mstp_clks[MSTP325]), /* IrDA */
+ CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */
+ CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP312]), /* MMCIF0 */
+ CLKDEV_DEV_ID("i2c-sh_mobile.3", &mstp_clks[MSTP411]), /* I2C3 */
+ CLKDEV_DEV_ID("i2c-sh_mobile.4", &mstp_clks[MSTP410]), /* I2C4 */
+ CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */
+};
+
+void __init sh73a0_clock_init(void)
+{
+ int k, ret = 0;
+
+ /* detect main clock parent */
+ switch ((__raw_readl(CKSCR) >> 24) & 0x03) {
+ case 0:
+ main_clk.parent = &sh73a0_extal1_clk;
+ break;
+ case 1:
+ main_clk.parent = &extal1_div2_clk;
+ break;
+ case 2:
+ main_clk.parent = &sh73a0_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_register(div6_clks, DIV6_NR);
+
+ if (!ret)
+ ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);
+
+ clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+ if (!ret)
+ clk_init();
+ else
+ panic("failed to setup sh73a0 clocks\n");
+}
projects / mv-sheeva.git / blobdiff