diff options
Diffstat (limited to 'arch/arm/mach-omap2/clock24xx.c')
| -rw-r--r-- | arch/arm/mach-omap2/clock24xx.c | 805 |
1 files changed, 0 insertions, 805 deletions
diff --git a/arch/arm/mach-omap2/clock24xx.c b/arch/arm/mach-omap2/clock24xx.c deleted file mode 100644 index 845b478ebeee..000000000000 --- a/arch/arm/mach-omap2/clock24xx.c +++ /dev/null @@ -1,805 +0,0 @@ -/* - * linux/arch/arm/mach-omap2/clock.c - * - * Copyright (C) 2005-2008 Texas Instruments, Inc. - * Copyright (C) 2004-2008 Nokia Corporation - * - * Contacts: - * Richard Woodruff <r-woodruff2@ti.com> - * Paul Walmsley - * - * Based on earlier work by Tuukka Tikkanen, Tony Lindgren, - * Gordon McNutt and RidgeRun, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#undef DEBUG - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/device.h> -#include <linux/list.h> -#include <linux/errno.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/cpufreq.h> -#include <linux/bitops.h> - -#include <plat/clock.h> -#include <plat/sram.h> -#include <plat/prcm.h> -#include <asm/div64.h> -#include <asm/clkdev.h> - -#include <plat/sdrc.h> -#include "clock.h" -#include "prm.h" -#include "prm-regbits-24xx.h" -#include "cm.h" -#include "cm-regbits-24xx.h" - -static const struct clkops clkops_oscck; -static const struct clkops clkops_fixed; - -static void omap2430_clk_i2chs_find_idlest(struct clk *clk, - void __iomem **idlest_reg, - u8 *idlest_bit); - -/* 2430 I2CHS has non-standard IDLEST register */ -static const struct clkops clkops_omap2430_i2chs_wait = { - .enable = omap2_dflt_clk_enable, - .disable = omap2_dflt_clk_disable, - .find_idlest = omap2430_clk_i2chs_find_idlest, - .find_companion = omap2_clk_dflt_find_companion, -}; - -#include "clock24xx.h" - -struct omap_clk { - u32 cpu; - struct clk_lookup lk; -}; - -#define CLK(dev, con, ck, cp) \ - { \ - .cpu = cp, \ - .lk = { \ - .dev_id = dev, \ - .con_id = con, \ - .clk = ck, \ - }, \ - } - -#define CK_243X RATE_IN_243X -#define CK_242X RATE_IN_242X - -static struct omap_clk omap24xx_clks[] = { - /* external root sources */ - CLK(NULL, "func_32k_ck", &func_32k_ck, CK_243X | CK_242X), - CLK(NULL, "secure_32k_ck", &secure_32k_ck, CK_243X | CK_242X), - CLK(NULL, "osc_ck", &osc_ck, CK_243X | CK_242X), - CLK(NULL, "sys_ck", &sys_ck, CK_243X | CK_242X), - CLK(NULL, "alt_ck", &alt_ck, CK_243X | CK_242X), - /* internal analog sources */ - CLK(NULL, "dpll_ck", &dpll_ck, CK_243X | CK_242X), - CLK(NULL, "apll96_ck", &apll96_ck, CK_243X | CK_242X), - CLK(NULL, "apll54_ck", &apll54_ck, CK_243X | CK_242X), - /* internal prcm root sources */ - CLK(NULL, "func_54m_ck", &func_54m_ck, CK_243X | CK_242X), - CLK(NULL, "core_ck", &core_ck, CK_243X | CK_242X), - CLK(NULL, "func_96m_ck", &func_96m_ck, CK_243X | CK_242X), - CLK(NULL, "func_48m_ck", &func_48m_ck, CK_243X | CK_242X), - CLK(NULL, "func_12m_ck", &func_12m_ck, CK_243X | CK_242X), - CLK(NULL, "ck_wdt1_osc", &wdt1_osc_ck, CK_243X | CK_242X), - CLK(NULL, "sys_clkout_src", &sys_clkout_src, CK_243X | CK_242X), - CLK(NULL, "sys_clkout", &sys_clkout, CK_243X | CK_242X), - CLK(NULL, "sys_clkout2_src", &sys_clkout2_src, CK_242X), - CLK(NULL, "sys_clkout2", &sys_clkout2, CK_242X), - CLK(NULL, "emul_ck", &emul_ck, CK_242X), - /* mpu domain clocks */ - CLK(NULL, "mpu_ck", &mpu_ck, CK_243X | CK_242X), - /* dsp domain clocks */ - CLK(NULL, "dsp_fck", &dsp_fck, CK_243X | CK_242X), - CLK(NULL, "dsp_irate_ick", &dsp_irate_ick, CK_243X | CK_242X), - CLK(NULL, "dsp_ick", &dsp_ick, CK_242X), - CLK(NULL, "iva2_1_ick", &iva2_1_ick, CK_243X), - CLK(NULL, "iva1_ifck", &iva1_ifck, CK_242X), - CLK(NULL, "iva1_mpu_int_ifck", &iva1_mpu_int_ifck, CK_242X), - /* GFX domain clocks */ - CLK(NULL, "gfx_3d_fck", &gfx_3d_fck, CK_243X | CK_242X), - CLK(NULL, "gfx_2d_fck", &gfx_2d_fck, CK_243X | CK_242X), - CLK(NULL, "gfx_ick", &gfx_ick, CK_243X | CK_242X), - /* Modem domain clocks */ - CLK(NULL, "mdm_ick", &mdm_ick, CK_243X), - CLK(NULL, "mdm_osc_ck", &mdm_osc_ck, CK_243X), - /* DSS domain clocks */ - CLK("omapdss", "ick", &dss_ick, CK_243X | CK_242X), - CLK("omapdss", "dss1_fck", &dss1_fck, CK_243X | CK_242X), - CLK("omapdss", "dss2_fck", &dss2_fck, CK_243X | CK_242X), - CLK("omapdss", "tv_fck", &dss_54m_fck, CK_243X | CK_242X), - /* L3 domain clocks */ - CLK(NULL, "core_l3_ck", &core_l3_ck, CK_243X | CK_242X), - CLK(NULL, "ssi_fck", &ssi_ssr_sst_fck, CK_243X | CK_242X), - CLK(NULL, "usb_l4_ick", &usb_l4_ick, CK_243X | CK_242X), - /* L4 domain clocks */ - CLK(NULL, "l4_ck", &l4_ck, CK_243X | CK_242X), - CLK(NULL, "ssi_l4_ick", &ssi_l4_ick, CK_243X | CK_242X), - /* virtual meta-group clock */ - CLK(NULL, "virt_prcm_set", &virt_prcm_set, CK_243X | CK_242X), - /* general l4 interface ck, multi-parent functional clk */ - CLK(NULL, "gpt1_ick", &gpt1_ick, CK_243X | CK_242X), - CLK(NULL, "gpt1_fck", &gpt1_fck, CK_243X | CK_242X), - CLK(NULL, "gpt2_ick", &gpt2_ick, CK_243X | CK_242X), - CLK(NULL, "gpt2_fck", &gpt2_fck, CK_243X | CK_242X), - CLK(NULL, "gpt3_ick", &gpt3_ick, CK_243X | CK_242X), - CLK(NULL, "gpt3_fck", &gpt3_fck, CK_243X | CK_242X), - CLK(NULL, "gpt4_ick", &gpt4_ick, CK_243X | CK_242X), - CLK(NULL, "gpt4_fck", &gpt4_fck, CK_243X | CK_242X), - CLK(NULL, "gpt5_ick", &gpt5_ick, CK_243X | CK_242X), - CLK(NULL, "gpt5_fck", &gpt5_fck, CK_243X | CK_242X), - CLK(NULL, "gpt6_ick", &gpt6_ick, CK_243X | CK_242X), - CLK(NULL, "gpt6_fck", &gpt6_fck, CK_243X | CK_242X), - CLK(NULL, "gpt7_ick", &gpt7_ick, CK_243X | CK_242X), - CLK(NULL, "gpt7_fck", &gpt7_fck, CK_243X | CK_242X), - CLK(NULL, "gpt8_ick", &gpt8_ick, CK_243X | CK_242X), - CLK(NULL, "gpt8_fck", &gpt8_fck, CK_243X | CK_242X), - CLK(NULL, "gpt9_ick", &gpt9_ick, CK_243X | CK_242X), - CLK(NULL, "gpt9_fck", &gpt9_fck, CK_243X | CK_242X), - CLK(NULL, "gpt10_ick", &gpt10_ick, CK_243X | CK_242X), - CLK(NULL, "gpt10_fck", &gpt10_fck, CK_243X | CK_242X), - CLK(NULL, "gpt11_ick", &gpt11_ick, CK_243X | CK_242X), - CLK(NULL, "gpt11_fck", &gpt11_fck, CK_243X | CK_242X), - CLK(NULL, "gpt12_ick", &gpt12_ick, CK_243X | CK_242X), - CLK(NULL, "gpt12_fck", &gpt12_fck, CK_243X | CK_242X), - CLK("omap-mcbsp.1", "ick", &mcbsp1_ick, CK_243X | CK_242X), - CLK("omap-mcbsp.1", "fck", &mcbsp1_fck, CK_243X | CK_242X), - CLK("omap-mcbsp.2", "ick", &mcbsp2_ick, CK_243X | CK_242X), - CLK("omap-mcbsp.2", "fck", &mcbsp2_fck, CK_243X | CK_242X), - CLK("omap-mcbsp.3", "ick", &mcbsp3_ick, CK_243X), - CLK("omap-mcbsp.3", "fck", &mcbsp3_fck, CK_243X), - CLK("omap-mcbsp.4", "ick", &mcbsp4_ick, CK_243X), - CLK("omap-mcbsp.4", "fck", &mcbsp4_fck, CK_243X), - CLK("omap-mcbsp.5", "ick", &mcbsp5_ick, CK_243X), - CLK("omap-mcbsp.5", "fck", &mcbsp5_fck, CK_243X), - CLK("omap2_mcspi.1", "ick", &mcspi1_ick, CK_243X | CK_242X), - CLK("omap2_mcspi.1", "fck", &mcspi1_fck, CK_243X | CK_242X), - CLK("omap2_mcspi.2", "ick", &mcspi2_ick, CK_243X | CK_242X), - CLK("omap2_mcspi.2", "fck", &mcspi2_fck, CK_243X | CK_242X), - CLK("omap2_mcspi.3", "ick", &mcspi3_ick, CK_243X), - CLK("omap2_mcspi.3", "fck", &mcspi3_fck, CK_243X), - CLK(NULL, "uart1_ick", &uart1_ick, CK_243X | CK_242X), - CLK(NULL, "uart1_fck", &uart1_fck, CK_243X | CK_242X), - CLK(NULL, "uart2_ick", &uart2_ick, CK_243X | CK_242X), - CLK(NULL, "uart2_fck", &uart2_fck, CK_243X | CK_242X), - CLK(NULL, "uart3_ick", &uart3_ick, CK_243X | CK_242X), - CLK(NULL, "uart3_fck", &uart3_fck, CK_243X | CK_242X), - CLK(NULL, "gpios_ick", &gpios_ick, CK_243X | CK_242X), - CLK(NULL, "gpios_fck", &gpios_fck, CK_243X | CK_242X), - CLK("omap_wdt", "ick", &mpu_wdt_ick, CK_243X | CK_242X), - CLK("omap_wdt", "fck", &mpu_wdt_fck, CK_243X | CK_242X), - CLK(NULL, "sync_32k_ick", &sync_32k_ick, CK_243X | CK_242X), - CLK(NULL, "wdt1_ick", &wdt1_ick, CK_243X | CK_242X), - CLK(NULL, "omapctrl_ick", &omapctrl_ick, CK_243X | CK_242X), - CLK(NULL, "icr_ick", &icr_ick, CK_243X), - CLK("omap24xxcam", "fck", &cam_fck, CK_243X | CK_242X), - CLK("omap24xxcam", "ick", &cam_ick, CK_243X | CK_242X), - CLK(NULL, "mailboxes_ick", &mailboxes_ick, CK_243X | CK_242X), - CLK(NULL, "wdt4_ick", &wdt4_ick, CK_243X | CK_242X), - CLK(NULL, "wdt4_fck", &wdt4_fck, CK_243X | CK_242X), - CLK(NULL, "wdt3_ick", &wdt3_ick, CK_242X), - CLK(NULL, "wdt3_fck", &wdt3_fck, CK_242X), - CLK(NULL, "mspro_ick", &mspro_ick, CK_243X | CK_242X), - CLK(NULL, "mspro_fck", &mspro_fck, CK_243X | CK_242X), - CLK("mmci-omap.0", "ick", &mmc_ick, CK_242X), - CLK("mmci-omap.0", "fck", &mmc_fck, CK_242X), - CLK(NULL, "fac_ick", &fac_ick, CK_243X | CK_242X), - CLK(NULL, "fac_fck", &fac_fck, CK_243X | CK_242X), - CLK(NULL, "eac_ick", &eac_ick, CK_242X), - CLK(NULL, "eac_fck", &eac_fck, CK_242X), - CLK("omap_hdq.0", "ick", &hdq_ick, CK_243X | CK_242X), - CLK("omap_hdq.1", "fck", &hdq_fck, CK_243X | CK_242X), - CLK("i2c_omap.1", "ick", &i2c1_ick, CK_243X | CK_242X), - CLK("i2c_omap.1", "fck", &i2c1_fck, CK_242X), - CLK("i2c_omap.1", "fck", &i2chs1_fck, CK_243X), - CLK("i2c_omap.2", "ick", &i2c2_ick, CK_243X | CK_242X), - CLK("i2c_omap.2", "fck", &i2c2_fck, CK_242X), - CLK("i2c_omap.2", "fck", &i2chs2_fck, CK_243X), - CLK(NULL, "gpmc_fck", &gpmc_fck, CK_243X | CK_242X), - CLK(NULL, "sdma_fck", &sdma_fck, CK_243X | CK_242X), - CLK(NULL, "sdma_ick", &sdma_ick, CK_243X | CK_242X), - CLK(NULL, "vlynq_ick", &vlynq_ick, CK_242X), - CLK(NULL, "vlynq_fck", &vlynq_fck, CK_242X), - CLK(NULL, "sdrc_ick", &sdrc_ick, CK_243X), - CLK(NULL, "des_ick", &des_ick, CK_243X | CK_242X), - CLK(NULL, "sha_ick", &sha_ick, CK_243X | CK_242X), - CLK("omap_rng", "ick", &rng_ick, CK_243X | CK_242X), - CLK(NULL, "aes_ick", &aes_ick, CK_243X | CK_242X), - CLK(NULL, "pka_ick", &pka_ick, CK_243X | CK_242X), - CLK(NULL, "usb_fck", &usb_fck, CK_243X | CK_242X), - CLK("musb_hdrc", "ick", &usbhs_ick, CK_243X), - CLK("mmci-omap-hs.0", "ick", &mmchs1_ick, CK_243X), - CLK("mmci-omap-hs.0", "fck", &mmchs1_fck, CK_243X), - CLK("mmci-omap-hs.1", "ick", &mmchs2_ick, CK_243X), - CLK("mmci-omap-hs.1", "fck", &mmchs2_fck, CK_243X), - CLK(NULL, "gpio5_ick", &gpio5_ick, CK_243X), - CLK(NULL, "gpio5_fck", &gpio5_fck, CK_243X), - CLK(NULL, "mdm_intc_ick", &mdm_intc_ick, CK_243X), - CLK("mmci-omap-hs.0", "mmchsdb_fck", &mmchsdb1_fck, CK_243X), - CLK("mmci-omap-hs.1", "mmchsdb_fck", &mmchsdb2_fck, CK_243X), -}; - -/* CM_CLKEN_PLL.EN_{54,96}M_PLL options (24XX) */ -#define EN_APLL_STOPPED 0 -#define EN_APLL_LOCKED 3 - -/* CM_CLKSEL1_PLL.APLLS_CLKIN options (24XX) */ -#define APLLS_CLKIN_19_2MHZ 0 -#define APLLS_CLKIN_13MHZ 2 -#define APLLS_CLKIN_12MHZ 3 - -/* #define DOWN_VARIABLE_DPLL 1 */ /* Experimental */ - -static struct prcm_config *curr_prcm_set; -static struct clk *vclk; -static struct clk *sclk; - -static void __iomem *prcm_clksrc_ctrl; - -/*------------------------------------------------------------------------- - * Omap24xx specific clock functions - *-------------------------------------------------------------------------*/ - -/** - * omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS - * @clk: struct clk * being enabled - * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into - * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into - * - * OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the - * CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE. This custom function - * passes back the correct CM_IDLEST register address for I2CHS - * modules. No return value. - */ -static void omap2430_clk_i2chs_find_idlest(struct clk *clk, - void __iomem **idlest_reg, - u8 *idlest_bit) -{ - *idlest_reg = OMAP_CM_REGADDR(CORE_MOD, CM_IDLEST); - *idlest_bit = clk->enable_bit; -} - - -/** - * omap2xxx_clk_get_core_rate - return the CORE_CLK rate - * @clk: pointer to the combined dpll_ck + core_ck (currently "dpll_ck") - * - * Returns the CORE_CLK rate. CORE_CLK can have one of three rate - * sources on OMAP2xxx: the DPLL CLKOUT rate, DPLL CLKOUTX2, or 32KHz - * (the latter is unusual). This currently should be called with - * struct clk *dpll_ck, which is a composite clock of dpll_ck and - * core_ck. - */ -static unsigned long omap2xxx_clk_get_core_rate(struct clk *clk) -{ - long long core_clk; - u32 v; - - core_clk = omap2_get_dpll_rate(clk); - - v = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); - v &= OMAP24XX_CORE_CLK_SRC_MASK; - - if (v == CORE_CLK_SRC_32K) - core_clk = 32768; - else - core_clk *= v; - - return core_clk; -} - -static int omap2_enable_osc_ck(struct clk *clk) -{ - u32 pcc; - - pcc = __raw_readl(prcm_clksrc_ctrl); - - __raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); - - return 0; -} - -static void omap2_disable_osc_ck(struct clk *clk) -{ - u32 pcc; - - pcc = __raw_readl(prcm_clksrc_ctrl); - - __raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); -} - -static const struct clkops clkops_oscck = { - .enable = &omap2_enable_osc_ck, - .disable = &omap2_disable_osc_ck, -}; - -#ifdef OLD_CK -/* Recalculate SYST_CLK */ -static void omap2_sys_clk_recalc(struct clk * clk) -{ - u32 div = PRCM_CLKSRC_CTRL; - div &= (1 << 7) | (1 << 6); /* Test if ext clk divided by 1 or 2 */ - div >>= clk->rate_offset; - clk->rate = (clk->parent->rate / div); - propagate_rate(clk); -} -#endif /* OLD_CK */ - -/* Enable an APLL if off */ -static int omap2_clk_fixed_enable(struct clk *clk) -{ - u32 cval, apll_mask; - - apll_mask = EN_APLL_LOCKED << clk->enable_bit; - - cval = cm_read_mod_reg(PLL_MOD, CM_CLKEN); - - if ((cval & apll_mask) == apll_mask) - return 0; /* apll already enabled */ - - cval &= ~apll_mask; - cval |= apll_mask; - cm_write_mod_reg(cval, PLL_MOD, CM_CLKEN); - - if (clk == &apll96_ck) - cval = OMAP24XX_ST_96M_APLL; - else if (clk == &apll54_ck) - cval = OMAP24XX_ST_54M_APLL; - - omap2_cm_wait_idlest(OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST), cval, - clk->name); - - /* - * REVISIT: Should we return an error code if omap2_wait_clock_ready() - * fails? - */ - return 0; -} - -/* Stop APLL */ -static void omap2_clk_fixed_disable(struct clk *clk) -{ - u32 cval; - - cval = cm_read_mod_reg(PLL_MOD, CM_CLKEN); - cval &= ~(EN_APLL_LOCKED << clk->enable_bit); - cm_write_mod_reg(cval, PLL_MOD, CM_CLKEN); -} - -static const struct clkops clkops_fixed = { - .enable = &omap2_clk_fixed_enable, - .disable = &omap2_clk_fixed_disable, -}; - -/* - * Uses the current prcm set to tell if a rate is valid. - * You can go slower, but not faster within a given rate set. - */ -static long omap2_dpllcore_round_rate(unsigned long target_rate) -{ - u32 high, low, core_clk_src; - - core_clk_src = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); - core_clk_src &= OMAP24XX_CORE_CLK_SRC_MASK; - - if (core_clk_src == CORE_CLK_SRC_DPLL) { /* DPLL clockout */ - high = curr_prcm_set->dpll_speed * 2; - low = curr_prcm_set->dpll_speed; - } else { /* DPLL clockout x 2 */ - high = curr_prcm_set->dpll_speed; - low = curr_prcm_set->dpll_speed / 2; - } - -#ifdef DOWN_VARIABLE_DPLL - if (target_rate > high) - return high; - else - return target_rate; -#else - if (target_rate > low) - return high; - else - return low; -#endif - -} - -static unsigned long omap2_dpllcore_recalc(struct clk *clk) -{ - return omap2xxx_clk_get_core_rate(clk); -} - -static int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate) -{ - u32 cur_rate, low, mult, div, valid_rate, done_rate; - u32 bypass = 0; - struct prcm_config tmpset; - const struct dpll_data *dd; - - cur_rate = omap2xxx_clk_get_core_rate(&dpll_ck); - mult = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); - mult &= OMAP24XX_CORE_CLK_SRC_MASK; - - if ((rate == (cur_rate / 2)) && (mult == 2)) { - omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1); - } else if ((rate == (cur_rate * 2)) && (mult == 1)) { - omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); - } else if (rate != cur_rate) { - valid_rate = omap2_dpllcore_round_rate(rate); - if (valid_rate != rate) - return -EINVAL; - - if (mult == 1) - low = curr_prcm_set->dpll_speed; - else - low = curr_prcm_set->dpll_speed / 2; - - dd = clk->dpll_data; - if (!dd) - return -EINVAL; - - tmpset.cm_clksel1_pll = __raw_readl(dd->mult_div1_reg); - tmpset.cm_clksel1_pll &= ~(dd->mult_mask | - dd->div1_mask); - div = ((curr_prcm_set->xtal_speed / 1000000) - 1); - tmpset.cm_clksel2_pll = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); - tmpset.cm_clksel2_pll &= ~OMAP24XX_CORE_CLK_SRC_MASK; - if (rate > low) { - tmpset.cm_clksel2_pll |= CORE_CLK_SRC_DPLL_X2; - mult = ((rate / 2) / 1000000); - done_rate = CORE_CLK_SRC_DPLL_X2; - } else { - tmpset.cm_clksel2_pll |= CORE_CLK_SRC_DPLL; - mult = (rate / 1000000); - done_rate = CORE_CLK_SRC_DPLL; - } - tmpset.cm_clksel1_pll |= (div << __ffs(dd->mult_mask)); - tmpset.cm_clksel1_pll |= (mult << __ffs(dd->div1_mask)); - - /* Worst case */ - tmpset.base_sdrc_rfr = SDRC_RFR_CTRL_BYPASS; - - if (rate == curr_prcm_set->xtal_speed) /* If asking for 1-1 */ - bypass = 1; - - /* For omap2xxx_sdrc_init_params() */ - omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); - - /* Force dll lock mode */ - omap2_set_prcm(tmpset.cm_clksel1_pll, tmpset.base_sdrc_rfr, - bypass); - - /* Errata: ret dll entry state */ - omap2xxx_sdrc_init_params(omap2xxx_sdrc_dll_is_unlocked()); - omap2xxx_sdrc_reprogram(done_rate, 0); - } - - return 0; -} - -/** - * omap2_table_mpu_recalc - just return the MPU speed - * @clk: virt_prcm_set struct clk - * - * Set virt_prcm_set's rate to the mpu_speed field of the current PRCM set. - */ -static unsigned long omap2_table_mpu_recalc(struct clk *clk) -{ - return curr_prcm_set->mpu_speed; -} - -/* - * Look for a rate equal or less than the target rate given a configuration set. - * - * What's not entirely clear is "which" field represents the key field. - * Some might argue L3-DDR, others ARM, others IVA. This code is simple and - * just uses the ARM rates. - */ -static long omap2_round_to_table_rate(struct clk *clk, unsigned long rate) -{ - struct prcm_config *ptr; - long highest_rate; - - if (clk != &virt_prcm_set) - return -EINVAL; - - highest_rate = -EINVAL; - - for (ptr = rate_table; ptr->mpu_speed; ptr++) { - if (!(ptr->flags & cpu_mask)) - continue; - if (ptr->xtal_speed != sys_ck.rate) - continue; - - highest_rate = ptr->mpu_speed; - - /* Can check only after xtal frequency check */ - if (ptr->mpu_speed <= rate) - break; - } - return highest_rate; -} - -/* Sets basic clocks based on the specified rate */ -static int omap2_select_table_rate(struct clk *clk, unsigned long rate) -{ - u32 cur_rate, done_rate, bypass = 0, tmp; - struct prcm_config *prcm; - unsigned long found_speed = 0; - unsigned long flags; - - if (clk != &virt_prcm_set) - return -EINVAL; - - for (prcm = rate_table; prcm->mpu_speed; prcm++) { - if (!(prcm->flags & cpu_mask)) - continue; - - if (prcm->xtal_speed != sys_ck.rate) - continue; - - if (prcm->mpu_speed <= rate) { - found_speed = prcm->mpu_speed; - break; - } - } - - if (!found_speed) { - printk(KERN_INFO "Could not set MPU rate to %luMHz\n", - rate / 1000000); - return -EINVAL; - } - - curr_prcm_set = prcm; - cur_rate = omap2xxx_clk_get_core_rate(&dpll_ck); - - if (prcm->dpll_speed == cur_rate / 2) { - omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1); - } else if (prcm->dpll_speed == cur_rate * 2) { - omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); - } else if (prcm->dpll_speed != cur_rate) { - local_irq_save(flags); - - if (prcm->dpll_speed == prcm->xtal_speed) - bypass = 1; - - if ((prcm->cm_clksel2_pll & OMAP24XX_CORE_CLK_SRC_MASK) == - CORE_CLK_SRC_DPLL_X2) - done_rate = CORE_CLK_SRC_DPLL_X2; - else - done_rate = CORE_CLK_SRC_DPLL; - - /* MPU divider */ - cm_write_mod_reg(prcm->cm_clksel_mpu, MPU_MOD, CM_CLKSEL); - - /* dsp + iva1 div(2420), iva2.1(2430) */ - cm_write_mod_reg(prcm->cm_clksel_dsp, - OMAP24XX_DSP_MOD, CM_CLKSEL); - - cm_write_mod_reg(prcm->cm_clksel_gfx, GFX_MOD, CM_CLKSEL); - - /* Major subsystem dividers */ - tmp = cm_read_mod_reg(CORE_MOD, CM_CLKSEL1) & OMAP24XX_CLKSEL_DSS2_MASK; - cm_write_mod_reg(prcm->cm_clksel1_core | tmp, CORE_MOD, - CM_CLKSEL1); - - if (cpu_is_omap2430()) - cm_write_mod_reg(prcm->cm_clksel_mdm, - OMAP2430_MDM_MOD, CM_CLKSEL); - - /* x2 to enter omap2xxx_sdrc_init_params() */ - omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); - - omap2_set_prcm(prcm->cm_clksel1_pll, prcm->base_sdrc_rfr, - bypass); - - omap2xxx_sdrc_init_params(omap2xxx_sdrc_dll_is_unlocked()); - omap2xxx_sdrc_reprogram(done_rate, 0); - - local_irq_restore(flags); - } - - return 0; -} - -#ifdef CONFIG_CPU_FREQ -/* - * Walk PRCM rate table and fillout cpufreq freq_table - */ -static struct cpufreq_frequency_table freq_table[ARRAY_SIZE(rate_table)]; - -void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table) -{ - struct prcm_config *prcm; - int i = 0; - - for (prcm = rate_table; prcm->mpu_speed; prcm++) { - if (!(prcm->flags & cpu_mask)) - continue; - if (prcm->xtal_speed != sys_ck.rate) - continue; - - /* don't put bypass rates in table */ - if (prcm->dpll_speed == prcm->xtal_speed) - continue; - - freq_table[i].index = i; - freq_table[i].frequency = prcm->mpu_speed / 1000; - i++; - } - - if (i == 0) { - printk(KERN_WARNING "%s: failed to initialize frequency " - "table\n", __func__); - return; - } - - freq_table[i].index = i; - freq_table[i].frequency = CPUFREQ_TABLE_END; - - *table = &freq_table[0]; -} -#endif - -static struct clk_functions omap2_clk_functions = { - .clk_enable = omap2_clk_enable, - .clk_disable = omap2_clk_disable, - .clk_round_rate = omap2_clk_round_rate, - .clk_set_rate = omap2_clk_set_rate, - .clk_set_parent = omap2_clk_set_parent, - .clk_disable_unused = omap2_clk_disable_unused, -#ifdef CONFIG_CPU_FREQ - .clk_init_cpufreq_table = omap2_clk_init_cpufreq_table, -#endif -}; - -static u32 omap2_get_apll_clkin(void) -{ - u32 aplls, srate = 0; - - aplls = cm_read_mod_reg(PLL_MOD, CM_CLKSEL1); - aplls &= OMAP24XX_APLLS_CLKIN_MASK; - aplls >>= OMAP24XX_APLLS_CLKIN_SHIFT; - - if (aplls == APLLS_CLKIN_19_2MHZ) - srate = 19200000; - else if (aplls == APLLS_CLKIN_13MHZ) - srate = 13000000; - else if (aplls == APLLS_CLKIN_12MHZ) - srate = 12000000; - - return srate; -} - -static u32 omap2_get_sysclkdiv(void) -{ - u32 div; - - div = __raw_readl(prcm_clksrc_ctrl); - div &= OMAP_SYSCLKDIV_MASK; - div >>= OMAP_SYSCLKDIV_SHIFT; - - return div; -} - -static unsigned long omap2_osc_clk_recalc(struct clk *clk) -{ - return omap2_get_apll_clkin() * omap2_get_sysclkdiv(); -} - -static unsigned long omap2_sys_clk_recalc(struct clk *clk) -{ - return clk->parent->rate / omap2_get_sysclkdiv(); -} - -/* - * Set clocks for bypass mode for reboot to work. - */ -void omap2_clk_prepare_for_reboot(void) -{ - u32 rate; - - if (vclk == NULL || sclk == NULL) - return; - - rate = clk_get_rate(sclk); - clk_set_rate(vclk, rate); -} - -/* - * Switch the MPU rate if specified on cmdline. - * We cannot do this early until cmdline is parsed. - */ -static int __init omap2_clk_arch_init(void) -{ - if (!mpurate) - return -EINVAL; - - if (clk_set_rate(&virt_prcm_set, mpurate)) - printk(KERN_ERR "Could not find matching MPU rate\n"); - - recalculate_root_clocks(); - - printk(KERN_INFO "Switched to new clocking rate (Crystal/DPLL/MPU): " - "%ld.%01ld/%ld/%ld MHz\n", - (sys_ck.rate / 1000000), (sys_ck.rate / 100000) % 10, - (dpll_ck.rate / 1000000), (mpu_ck.rate / 1000000)) ; - - return 0; -} -arch_initcall(omap2_clk_arch_init); - -int __init omap2_clk_init(void) -{ - struct prcm_config *prcm; - struct omap_clk *c; - u32 clkrate; - - if (cpu_is_omap242x()) { - prcm_clksrc_ctrl = OMAP2420_PRCM_CLKSRC_CTRL; - cpu_mask = RATE_IN_242X; - } else if (cpu_is_omap2430()) { - prcm_clksrc_ctrl = OMAP2430_PRCM_CLKSRC_CTRL; - cpu_mask = RATE_IN_243X; - } - - clk_init(&omap2_clk_functions); - - for (c = omap24xx_clks; c < omap24xx_clks + ARRAY_SIZE(omap24xx_clks); c++) - clk_preinit(c->lk.clk); - - osc_ck.rate = omap2_osc_clk_recalc(&osc_ck); - propagate_rate(&osc_ck); - sys_ck.rate = omap2_sys_clk_recalc(&sys_ck); - propagate_rate(&sys_ck); - - for (c = omap24xx_clks; c < omap24xx_clks + ARRAY_SIZE(omap24xx_clks); c++) - if (c->cpu & cpu_mask) { - clkdev_add(&c->lk); - clk_register(c->lk.clk); - omap2_init_clk_clkdm(c->lk.clk); - } - - /* Check the MPU rate set by bootloader */ - clkrate = omap2xxx_clk_get_core_rate(&dpll_ck); - for (prcm = rate_table; prcm->mpu_speed; prcm++) { - if (!(prcm->flags & cpu_mask)) - continue; - if (prcm->xtal_speed != sys_ck.rate) - continue; - if (prcm->dpll_speed <= clkrate) - break; - } - curr_prcm_set = prcm; - - recalculate_root_clocks(); - - printk(KERN_INFO "Clocking rate (Crystal/DPLL/MPU): " - "%ld.%01ld/%ld/%ld MHz\n", - (sys_ck.rate / 1000000), (sys_ck.rate / 100000) % 10, - (dpll_ck.rate / 1000000), (mpu_ck.rate / 1000000)) ; - - /* - * Only enable those clocks we will need, let the drivers - * enable other clocks as necessary - */ - clk_enable_init_clocks(); - - /* Avoid sleeping sleeping during omap2_clk_prepare_for_reboot() */ - vclk = clk_get(NULL, "virt_prcm_set"); - sclk = clk_get(NULL, "sys_ck"); - - return 0; -} |