diff options
Diffstat (limited to 'arch/arm/mach-omap1/clock.c')
| -rw-r--r-- | arch/arm/mach-omap1/clock.c | 501 |
1 files changed, 112 insertions, 389 deletions
diff --git a/arch/arm/mach-omap1/clock.c b/arch/arm/mach-omap1/clock.c index 42cbe20..2ba9ab95 100644 --- a/arch/arm/mach-omap1/clock.c +++ b/arch/arm/mach-omap1/clock.c @@ -1,7 +1,7 @@ /* * linux/arch/arm/mach-omap1/clock.c * - * Copyright (C) 2004 - 2005 Nokia corporation + * Copyright (C) 2004 - 2005, 2009 Nokia corporation * Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com> * * Modified to use omap shared clock framework by @@ -26,12 +26,17 @@ #include <plat/usb.h> #include <plat/clock.h> #include <plat/sram.h> - -static const struct clkops clkops_generic; -static const struct clkops clkops_uart; -static const struct clkops clkops_dspck; +#include <plat/clkdev_omap.h> #include "clock.h" +#include "opp.h" + +__u32 arm_idlect1_mask; +struct clk *api_ck_p, *ck_dpll1_p, *ck_ref_p; + +/*------------------------------------------------------------------------- + * Omap1 specific clock functions + *-------------------------------------------------------------------------*/ static int clk_omap1_dummy_enable(struct clk *clk) { @@ -42,134 +47,24 @@ static void clk_omap1_dummy_disable(struct clk *clk) { } -static const struct clkops clkops_dummy = { - .enable = clk_omap1_dummy_enable, - .disable = clk_omap1_dummy_disable, -}; - -static struct clk dummy_ck = { - .name = "dummy", - .ops = &clkops_dummy, - .flags = RATE_FIXED, -}; - -struct omap_clk { - u32 cpu; - struct clk_lookup lk; +const struct clkops clkops_dummy = { + .enable = clk_omap1_dummy_enable, + .disable = clk_omap1_dummy_disable, }; -#define CLK(dev, con, ck, cp) \ - { \ - .cpu = cp, \ - .lk = { \ - .dev_id = dev, \ - .con_id = con, \ - .clk = ck, \ - }, \ - } - -#define CK_310 (1 << 0) -#define CK_7XX (1 << 1) -#define CK_1510 (1 << 2) -#define CK_16XX (1 << 3) - -static struct omap_clk omap_clks[] = { - /* non-ULPD clocks */ - CLK(NULL, "ck_ref", &ck_ref, CK_16XX | CK_1510 | CK_310 | CK_7XX), - CLK(NULL, "ck_dpll1", &ck_dpll1, CK_16XX | CK_1510 | CK_310), - /* CK_GEN1 clocks */ - CLK(NULL, "ck_dpll1out", &ck_dpll1out.clk, CK_16XX), - CLK(NULL, "ck_sossi", &sossi_ck, CK_16XX), - CLK(NULL, "arm_ck", &arm_ck, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "armper_ck", &armper_ck.clk, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "arm_gpio_ck", &arm_gpio_ck, CK_1510 | CK_310), - CLK(NULL, "armxor_ck", &armxor_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX), - CLK(NULL, "armtim_ck", &armtim_ck.clk, CK_16XX | CK_1510 | CK_310), - CLK("omap_wdt", "fck", &armwdt_ck.clk, CK_16XX | CK_1510 | CK_310), - CLK("omap_wdt", "ick", &armper_ck.clk, CK_16XX), - CLK("omap_wdt", "ick", &dummy_ck, CK_1510 | CK_310), - CLK(NULL, "arminth_ck", &arminth_ck1510, CK_1510 | CK_310), - CLK(NULL, "arminth_ck", &arminth_ck16xx, CK_16XX), - /* CK_GEN2 clocks */ - CLK(NULL, "dsp_ck", &dsp_ck, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "dspmmu_ck", &dspmmu_ck, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "dspper_ck", &dspper_ck, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "dspxor_ck", &dspxor_ck, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "dsptim_ck", &dsptim_ck, CK_16XX | CK_1510 | CK_310), - /* CK_GEN3 clocks */ - CLK(NULL, "tc_ck", &tc_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX), - CLK(NULL, "tipb_ck", &tipb_ck, CK_1510 | CK_310), - CLK(NULL, "l3_ocpi_ck", &l3_ocpi_ck, CK_16XX | CK_7XX), - CLK(NULL, "tc1_ck", &tc1_ck, CK_16XX), - CLK(NULL, "tc2_ck", &tc2_ck, CK_16XX), - CLK(NULL, "dma_ck", &dma_ck, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "dma_lcdfree_ck", &dma_lcdfree_ck, CK_16XX), - CLK(NULL, "api_ck", &api_ck.clk, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "lb_ck", &lb_ck.clk, CK_1510 | CK_310), - CLK(NULL, "rhea1_ck", &rhea1_ck, CK_16XX), - CLK(NULL, "rhea2_ck", &rhea2_ck, CK_16XX), - CLK(NULL, "lcd_ck", &lcd_ck_16xx, CK_16XX | CK_7XX), - CLK(NULL, "lcd_ck", &lcd_ck_1510.clk, CK_1510 | CK_310), - /* ULPD clocks */ - CLK(NULL, "uart1_ck", &uart1_1510, CK_1510 | CK_310), - CLK(NULL, "uart1_ck", &uart1_16xx.clk, CK_16XX), - CLK(NULL, "uart2_ck", &uart2_ck, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "uart3_ck", &uart3_1510, CK_1510 | CK_310), - CLK(NULL, "uart3_ck", &uart3_16xx.clk, CK_16XX), - CLK(NULL, "usb_clko", &usb_clko, CK_16XX | CK_1510 | CK_310), - CLK(NULL, "usb_hhc_ck", &usb_hhc_ck1510, CK_1510 | CK_310), - CLK(NULL, "usb_hhc_ck", &usb_hhc_ck16xx, CK_16XX), - CLK(NULL, "usb_dc_ck", &usb_dc_ck, CK_16XX), - CLK(NULL, "usb_dc_ck", &usb_dc_ck7xx, CK_7XX), - CLK(NULL, "mclk", &mclk_1510, CK_1510 | CK_310), - CLK(NULL, "mclk", &mclk_16xx, CK_16XX), - CLK(NULL, "bclk", &bclk_1510, CK_1510 | CK_310), - CLK(NULL, "bclk", &bclk_16xx, CK_16XX), - CLK("mmci-omap.0", "fck", &mmc1_ck, CK_16XX | CK_1510 | CK_310), - CLK("mmci-omap.0", "fck", &mmc3_ck, CK_7XX), - CLK("mmci-omap.0", "ick", &armper_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX), - CLK("mmci-omap.1", "fck", &mmc2_ck, CK_16XX), - CLK("mmci-omap.1", "ick", &armper_ck.clk, CK_16XX), - /* Virtual clocks */ - CLK(NULL, "mpu", &virtual_ck_mpu, CK_16XX | CK_1510 | CK_310), - CLK("i2c_omap.1", "fck", &i2c_fck, CK_16XX | CK_1510 | CK_310), - CLK("i2c_omap.1", "ick", &i2c_ick, CK_16XX), - CLK("i2c_omap.1", "ick", &dummy_ck, CK_1510 | CK_310), - CLK("omap_uwire", "fck", &armxor_ck.clk, CK_16XX | CK_1510 | CK_310), - CLK("omap-mcbsp.1", "ick", &dspper_ck, CK_16XX), - CLK("omap-mcbsp.1", "ick", &dummy_ck, CK_1510 | CK_310), - CLK("omap-mcbsp.2", "ick", &armper_ck.clk, CK_16XX), - CLK("omap-mcbsp.2", "ick", &dummy_ck, CK_1510 | CK_310), - CLK("omap-mcbsp.3", "ick", &dspper_ck, CK_16XX), - CLK("omap-mcbsp.3", "ick", &dummy_ck, CK_1510 | CK_310), - CLK("omap-mcbsp.1", "fck", &dspxor_ck, CK_16XX | CK_1510 | CK_310), - CLK("omap-mcbsp.2", "fck", &armper_ck.clk, CK_16XX | CK_1510 | CK_310), - CLK("omap-mcbsp.3", "fck", &dspxor_ck, CK_16XX | CK_1510 | CK_310), -}; - -static int omap1_clk_enable_generic(struct clk * clk); -static int omap1_clk_enable(struct clk *clk); -static void omap1_clk_disable_generic(struct clk * clk); -static void omap1_clk_disable(struct clk *clk); - -__u32 arm_idlect1_mask; - -/*------------------------------------------------------------------------- - * Omap1 specific clock functions - *-------------------------------------------------------------------------*/ - -static unsigned long omap1_watchdog_recalc(struct clk *clk) +/* XXX can be replaced with a fixed_divisor_recalc */ +unsigned long omap1_watchdog_recalc(struct clk *clk) { return clk->parent->rate / 14; } -static unsigned long omap1_uart_recalc(struct clk *clk) +unsigned long omap1_uart_recalc(struct clk *clk) { unsigned int val = __raw_readl(clk->enable_reg); return val & clk->enable_bit ? 48000000 : 12000000; } -static unsigned long omap1_sossi_recalc(struct clk *clk) +unsigned long omap1_sossi_recalc(struct clk *clk) { u32 div = omap_readl(MOD_CONF_CTRL_1); @@ -179,64 +74,6 @@ static unsigned long omap1_sossi_recalc(struct clk *clk) return clk->parent->rate / div; } -static int omap1_clk_enable_dsp_domain(struct clk *clk) -{ - int retval; - - retval = omap1_clk_enable(&api_ck.clk); - if (!retval) { - retval = omap1_clk_enable_generic(clk); - omap1_clk_disable(&api_ck.clk); - } - - return retval; -} - -static void omap1_clk_disable_dsp_domain(struct clk *clk) -{ - if (omap1_clk_enable(&api_ck.clk) == 0) { - omap1_clk_disable_generic(clk); - omap1_clk_disable(&api_ck.clk); - } -} - -static const struct clkops clkops_dspck = { - .enable = &omap1_clk_enable_dsp_domain, - .disable = &omap1_clk_disable_dsp_domain, -}; - -static int omap1_clk_enable_uart_functional(struct clk *clk) -{ - int ret; - struct uart_clk *uclk; - - ret = omap1_clk_enable_generic(clk); - if (ret == 0) { - /* Set smart idle acknowledgement mode */ - uclk = (struct uart_clk *)clk; - omap_writeb((omap_readb(uclk->sysc_addr) & ~0x10) | 8, - uclk->sysc_addr); - } - - return ret; -} - -static void omap1_clk_disable_uart_functional(struct clk *clk) -{ - struct uart_clk *uclk; - - /* Set force idle acknowledgement mode */ - uclk = (struct uart_clk *)clk; - omap_writeb((omap_readb(uclk->sysc_addr) & ~0x18), uclk->sysc_addr); - - omap1_clk_disable_generic(clk); -} - -static const struct clkops clkops_uart = { - .enable = &omap1_clk_enable_uart_functional, - .disable = &omap1_clk_disable_uart_functional, -}; - static void omap1_clk_allow_idle(struct clk *clk) { struct arm_idlect1_clk * iclk = (struct arm_idlect1_clk *)clk; @@ -344,7 +181,7 @@ static int calc_dsor_exp(struct clk *clk, unsigned long rate) return dsor_exp; } -static unsigned long omap1_ckctl_recalc(struct clk *clk) +unsigned long omap1_ckctl_recalc(struct clk *clk) { /* Calculate divisor encoded as 2-bit exponent */ int dsor = 1 << (3 & (omap_readw(ARM_CKCTL) >> clk->rate_offset)); @@ -352,7 +189,7 @@ static unsigned long omap1_ckctl_recalc(struct clk *clk) return clk->parent->rate / dsor; } -static unsigned long omap1_ckctl_recalc_dsp_domain(struct clk *clk) +unsigned long omap1_ckctl_recalc_dsp_domain(struct clk *clk) { int dsor; @@ -363,28 +200,29 @@ static unsigned long omap1_ckctl_recalc_dsp_domain(struct clk *clk) * Note that DSP_CKCTL virt addr = phys addr, so * we must use __raw_readw() instead of omap_readw(). */ - omap1_clk_enable(&api_ck.clk); + omap1_clk_enable(api_ck_p); dsor = 1 << (3 & (__raw_readw(DSP_CKCTL) >> clk->rate_offset)); - omap1_clk_disable(&api_ck.clk); + omap1_clk_disable(api_ck_p); return clk->parent->rate / dsor; } /* MPU virtual clock functions */ -static int omap1_select_table_rate(struct clk * clk, unsigned long rate) +int omap1_select_table_rate(struct clk *clk, unsigned long rate) { /* Find the highest supported frequency <= rate and switch to it */ struct mpu_rate * ptr; + unsigned long dpll1_rate, ref_rate; - if (clk != &virtual_ck_mpu) - return -EINVAL; + dpll1_rate = clk_get_rate(ck_dpll1_p); + ref_rate = clk_get_rate(ck_ref_p); - for (ptr = rate_table; ptr->rate; ptr++) { - if (ptr->xtal != ck_ref.rate) + for (ptr = omap1_rate_table; ptr->rate; ptr++) { + if (ptr->xtal != ref_rate) continue; /* DPLL1 cannot be reprogrammed without risking system crash */ - if (likely(ck_dpll1.rate!=0) && ptr->pll_rate != ck_dpll1.rate) + if (likely(dpll1_rate != 0) && ptr->pll_rate != dpll1_rate) continue; /* Can check only after xtal frequency check */ @@ -405,11 +243,13 @@ static int omap1_select_table_rate(struct clk * clk, unsigned long rate) else omap_sram_reprogram_clock(ptr->dpllctl_val, ptr->ckctl_val); - ck_dpll1.rate = ptr->pll_rate; + /* XXX Do we need to recalculate the tree below DPLL1 at this point? */ + ck_dpll1_p->rate = ptr->pll_rate; + return 0; } -static int omap1_clk_set_rate_dsp_domain(struct clk *clk, unsigned long rate) +int omap1_clk_set_rate_dsp_domain(struct clk *clk, unsigned long rate) { int dsor_exp; u16 regval; @@ -429,7 +269,7 @@ static int omap1_clk_set_rate_dsp_domain(struct clk *clk, unsigned long rate) return 0; } -static long omap1_clk_round_rate_ckctl_arm(struct clk *clk, unsigned long rate) +long omap1_clk_round_rate_ckctl_arm(struct clk *clk, unsigned long rate) { int dsor_exp = calc_dsor_exp(clk, rate); if (dsor_exp < 0) @@ -439,7 +279,7 @@ static long omap1_clk_round_rate_ckctl_arm(struct clk *clk, unsigned long rate) return clk->parent->rate / (1 << dsor_exp); } -static int omap1_clk_set_rate_ckctl_arm(struct clk *clk, unsigned long rate) +int omap1_clk_set_rate_ckctl_arm(struct clk *clk, unsigned long rate) { int dsor_exp; u16 regval; @@ -459,19 +299,19 @@ static int omap1_clk_set_rate_ckctl_arm(struct clk *clk, unsigned long rate) return 0; } -static long omap1_round_to_table_rate(struct clk * clk, unsigned long rate) +long omap1_round_to_table_rate(struct clk *clk, unsigned long rate) { /* Find the highest supported frequency <= rate */ struct mpu_rate * ptr; - long highest_rate; + long highest_rate; + unsigned long ref_rate; - if (clk != &virtual_ck_mpu) - return -EINVAL; + ref_rate = clk_get_rate(ck_ref_p); highest_rate = -EINVAL; - for (ptr = rate_table; ptr->rate; ptr++) { - if (ptr->xtal != ck_ref.rate) + for (ptr = omap1_rate_table; ptr->rate; ptr++) { + if (ptr->xtal != ref_rate) continue; highest_rate = ptr->rate; @@ -506,8 +346,8 @@ static unsigned calc_ext_dsor(unsigned long rate) return dsor; } -/* Only needed on 1510 */ -static int omap1_set_uart_rate(struct clk * clk, unsigned long rate) +/* XXX Only needed on 1510 */ +int omap1_set_uart_rate(struct clk *clk, unsigned long rate) { unsigned int val; @@ -525,7 +365,7 @@ static int omap1_set_uart_rate(struct clk * clk, unsigned long rate) } /* External clock (MCLK & BCLK) functions */ -static int omap1_set_ext_clk_rate(struct clk * clk, unsigned long rate) +int omap1_set_ext_clk_rate(struct clk *clk, unsigned long rate) { unsigned dsor; __u16 ratio_bits; @@ -543,7 +383,7 @@ static int omap1_set_ext_clk_rate(struct clk * clk, unsigned long rate) return 0; } -static int omap1_set_sossi_rate(struct clk *clk, unsigned long rate) +int omap1_set_sossi_rate(struct clk *clk, unsigned long rate) { u32 l; int div; @@ -566,12 +406,12 @@ static int omap1_set_sossi_rate(struct clk *clk, unsigned long rate) return 0; } -static long omap1_round_ext_clk_rate(struct clk * clk, unsigned long rate) +long omap1_round_ext_clk_rate(struct clk *clk, unsigned long rate) { return 96000000 / calc_ext_dsor(rate); } -static void omap1_init_ext_clk(struct clk * clk) +void omap1_init_ext_clk(struct clk *clk) { unsigned dsor; __u16 ratio_bits; @@ -589,7 +429,7 @@ static void omap1_init_ext_clk(struct clk * clk) clk-> rate = 96000000 / dsor; } -static int omap1_clk_enable(struct clk *clk) +int omap1_clk_enable(struct clk *clk) { int ret = 0; @@ -617,7 +457,7 @@ err: return ret; } -static void omap1_clk_disable(struct clk *clk) +void omap1_clk_disable(struct clk *clk) { if (clk->usecount > 0 && !(--clk->usecount)) { clk->ops->disable(clk); @@ -672,12 +512,70 @@ static void omap1_clk_disable_generic(struct clk *clk) } } -static const struct clkops clkops_generic = { - .enable = &omap1_clk_enable_generic, - .disable = &omap1_clk_disable_generic, +const struct clkops clkops_generic = { + .enable = omap1_clk_enable_generic, + .disable = omap1_clk_disable_generic, +}; + +static int omap1_clk_enable_dsp_domain(struct clk *clk) +{ + int retval; + + retval = omap1_clk_enable(api_ck_p); + if (!retval) { + retval = omap1_clk_enable_generic(clk); + omap1_clk_disable(api_ck_p); + } + + return retval; +} + +static void omap1_clk_disable_dsp_domain(struct clk *clk) +{ + if (omap1_clk_enable(api_ck_p) == 0) { + omap1_clk_disable_generic(clk); + omap1_clk_disable(api_ck_p); + } +} + +const struct clkops clkops_dspck = { + .enable = omap1_clk_enable_dsp_domain, + .disable = omap1_clk_disable_dsp_domain, +}; + +static int omap1_clk_enable_uart_functional(struct clk *clk) +{ + int ret; + struct uart_clk *uclk; + + ret = omap1_clk_enable_generic(clk); + if (ret == 0) { + /* Set smart idle acknowledgement mode */ + uclk = (struct uart_clk *)clk; + omap_writeb((omap_readb(uclk->sysc_addr) & ~0x10) | 8, + uclk->sysc_addr); + } + + return ret; +} + +static void omap1_clk_disable_uart_functional(struct clk *clk) +{ + struct uart_clk *uclk; + + /* Set force idle acknowledgement mode */ + uclk = (struct uart_clk *)clk; + omap_writeb((omap_readb(uclk->sysc_addr) & ~0x18), uclk->sysc_addr); + + omap1_clk_disable_generic(clk); +} + +const struct clkops clkops_uart = { + .enable = omap1_clk_enable_uart_functional, + .disable = omap1_clk_disable_uart_functional, }; -static long omap1_clk_round_rate(struct clk *clk, unsigned long rate) +long omap1_clk_round_rate(struct clk *clk, unsigned long rate) { if (clk->flags & RATE_FIXED) return clk->rate; @@ -688,7 +586,7 @@ static long omap1_clk_round_rate(struct clk *clk, unsigned long rate) return clk->rate; } -static int omap1_clk_set_rate(struct clk *clk, unsigned long rate) +int omap1_clk_set_rate(struct clk *clk, unsigned long rate) { int ret = -EINVAL; @@ -703,7 +601,7 @@ static int omap1_clk_set_rate(struct clk *clk, unsigned long rate) #ifdef CONFIG_OMAP_RESET_CLOCKS -static void __init omap1_clk_disable_unused(struct clk *clk) +void __init omap1_clk_disable_unused(struct clk *clk) { __u32 regval32; @@ -724,184 +622,9 @@ static void __init omap1_clk_disable_unused(struct clk *clk) if ((regval32 & (1 << clk->enable_bit)) == 0) return; - /* FIXME: This clock seems to be necessary but no-one - * has asked for its activation. */ - if (clk == &tc2_ck /* FIX: pm.c (SRAM), CCP, Camera */ - || clk == &ck_dpll1out.clk /* FIX: SoSSI, SSR */ - || clk == &arm_gpio_ck /* FIX: GPIO code for 1510 */ - ) { - printk(KERN_INFO "FIXME: Clock \"%s\" seems unused\n", - clk->name); - return; - } - printk(KERN_INFO "Disabling unused clock \"%s\"... ", clk->name); clk->ops->disable(clk); printk(" done\n"); } -#else -#define omap1_clk_disable_unused NULL #endif - -static struct clk_functions omap1_clk_functions = { - .clk_enable = omap1_clk_enable, - .clk_disable = omap1_clk_disable, - .clk_round_rate = omap1_clk_round_rate, - .clk_set_rate = omap1_clk_set_rate, - .clk_disable_unused = omap1_clk_disable_unused, -}; - -int __init omap1_clk_init(void) -{ - struct omap_clk *c; - const struct omap_clock_config *info; - int crystal_type = 0; /* Default 12 MHz */ - u32 reg, cpu_mask; - -#ifdef CONFIG_DEBUG_LL - /* Resets some clocks that may be left on from bootloader, - * but leaves serial clocks on. - */ - omap_writel(0x3 << 29, MOD_CONF_CTRL_0); -#endif - - /* USB_REQ_EN will be disabled later if necessary (usb_dc_ck) */ - reg = omap_readw(SOFT_REQ_REG) & (1 << 4); - omap_writew(reg, SOFT_REQ_REG); - if (!cpu_is_omap15xx()) - omap_writew(0, SOFT_REQ_REG2); - - clk_init(&omap1_clk_functions); - - /* By default all idlect1 clocks are allowed to idle */ - arm_idlect1_mask = ~0; - - for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++) - clk_preinit(c->lk.clk); - - cpu_mask = 0; - if (cpu_is_omap16xx()) - cpu_mask |= CK_16XX; - if (cpu_is_omap1510()) - cpu_mask |= CK_1510; - if (cpu_is_omap7xx()) - cpu_mask |= CK_7XX; - if (cpu_is_omap310()) - cpu_mask |= CK_310; - - for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++) - if (c->cpu & cpu_mask) { - clkdev_add(&c->lk); - clk_register(c->lk.clk); - } - - info = omap_get_config(OMAP_TAG_CLOCK, struct omap_clock_config); - if (info != NULL) { - if (!cpu_is_omap15xx()) - crystal_type = info->system_clock_type; - } - -#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850) - ck_ref.rate = 13000000; -#elif defined(CONFIG_ARCH_OMAP16XX) - if (crystal_type == 2) - ck_ref.rate = 19200000; -#endif - - printk("Clocks: ARM_SYSST: 0x%04x DPLL_CTL: 0x%04x ARM_CKCTL: 0x%04x\n", - omap_readw(ARM_SYSST), omap_readw(DPLL_CTL), - omap_readw(ARM_CKCTL)); - - /* We want to be in syncronous scalable mode */ - omap_writew(0x1000, ARM_SYSST); - -#ifdef CONFIG_OMAP_CLOCKS_SET_BY_BOOTLOADER - /* Use values set by bootloader. Determine PLL rate and recalculate - * dependent clocks as if kernel had changed PLL or divisors. - */ - { - unsigned pll_ctl_val = omap_readw(DPLL_CTL); - - ck_dpll1.rate = ck_ref.rate; /* Base xtal rate */ - if (pll_ctl_val & 0x10) { - /* PLL enabled, apply multiplier and divisor */ - if (pll_ctl_val & 0xf80) - ck_dpll1.rate *= (pll_ctl_val & 0xf80) >> 7; - ck_dpll1.rate /= ((pll_ctl_val & 0x60) >> 5) + 1; - } else { - /* PLL disabled, apply bypass divisor */ - switch (pll_ctl_val & 0xc) { - case 0: - break; - case 0x4: - ck_dpll1.rate /= 2; - break; - default: - ck_dpll1.rate /= 4; - break; - } - } - } -#else - /* Find the highest supported frequency and enable it */ - if (omap1_select_table_rate(&virtual_ck_mpu, ~0)) { - printk(KERN_ERR "System frequencies not set. Check your config.\n"); - /* Guess sane values (60MHz) */ - omap_writew(0x2290, DPLL_CTL); - omap_writew(cpu_is_omap7xx() ? 0x3005 : 0x1005, ARM_CKCTL); - ck_dpll1.rate = 60000000; - } -#endif - propagate_rate(&ck_dpll1); - /* Cache rates for clocks connected to ck_ref (not dpll1) */ - propagate_rate(&ck_ref); - printk(KERN_INFO "Clocking rate (xtal/DPLL1/MPU): " - "%ld.%01ld/%ld.%01ld/%ld.%01ld MHz\n", - ck_ref.rate / 1000000, (ck_ref.rate / 100000) % 10, - ck_dpll1.rate / 1000000, (ck_dpll1.rate / 100000) % 10, - arm_ck.rate / 1000000, (arm_ck.rate / 100000) % 10); - -#if defined(CONFIG_MACH_OMAP_PERSEUS2) || defined(CONFIG_MACH_OMAP_FSAMPLE) - /* Select slicer output as OMAP input clock */ - omap_writew(omap_readw(OMAP7XX_PCC_UPLD_CTRL) & ~0x1, OMAP7XX_PCC_UPLD_CTRL); -#endif - - /* Amstrad Delta wants BCLK high when inactive */ - if (machine_is_ams_delta()) - omap_writel(omap_readl(ULPD_CLOCK_CTRL) | - (1 << SDW_MCLK_INV_BIT), - ULPD_CLOCK_CTRL); - - /* Turn off DSP and ARM_TIMXO. Make sure ARM_INTHCK is not divided */ - /* (on 730, bit 13 must not be cleared) */ - if (cpu_is_omap7xx()) - omap_writew(omap_readw(ARM_CKCTL) & 0x2fff, ARM_CKCTL); - else - omap_writew(omap_readw(ARM_CKCTL) & 0x0fff, ARM_CKCTL); - - /* Put DSP/MPUI into reset until needed */ - omap_writew(0, ARM_RSTCT1); - omap_writew(1, ARM_RSTCT2); - omap_writew(0x400, ARM_IDLECT1); - - /* - * According to OMAP5910 Erratum SYS_DMA_1, bit DMACK_REQ (bit 8) - * of the ARM_IDLECT2 register must be set to zero. The power-on - * default value of this bit is one. - */ - omap_writew(0x0000, ARM_IDLECT2); /* Turn LCD clock off also */ - - /* - * Only enable those clocks we will need, let the drivers - * enable other clocks as necessary - */ - clk_enable(&armper_ck.clk); - clk_enable(&armxor_ck.clk); - clk_enable(&armtim_ck.clk); /* This should be done by timer code */ - - if (cpu_is_omap15xx()) - clk_enable(&arm_gpio_ck); - - return 0; -} |
