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791 lines
22 KiB
C
791 lines
22 KiB
C
/*-
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* Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/timeet.h>
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#include <sys/timetc.h>
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#include <sys/watchdog.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <arm/ti/tivar.h>
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#include <arm/ti/ti_scm.h>
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#include <arm/ti/ti_prcm.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <machine/bus.h>
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#include <machine/fdt.h>
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#define CM_PER 0
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#define CM_PER_L4LS_CLKSTCTRL (CM_PER + 0x000)
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#define CM_PER_L3S_CLKSTCTRL (CM_PER + 0x004)
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#define CM_PER_L3_CLKSTCTRL (CM_PER + 0x00C)
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#define CM_PER_CPGMAC0_CLKCTRL (CM_PER + 0x014)
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#define CM_PER_LCDC_CLKCTRL (CM_PER + 0x018)
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#define CM_PER_USB0_CLKCTRL (CM_PER + 0x01C)
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#define CM_PER_TPTC0_CLKCTRL (CM_PER + 0x024)
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#define CM_PER_UART5_CLKCTRL (CM_PER + 0x038)
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#define CM_PER_MMC0_CLKCTRL (CM_PER + 0x03C)
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#define CM_PER_I2C2_CLKCTRL (CM_PER + 0x044)
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#define CM_PER_I2C1_CLKCTRL (CM_PER + 0x048)
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#define CM_PER_UART1_CLKCTRL (CM_PER + 0x06C)
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#define CM_PER_UART2_CLKCTRL (CM_PER + 0x070)
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#define CM_PER_UART3_CLKCTRL (CM_PER + 0x074)
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#define CM_PER_UART4_CLKCTRL (CM_PER + 0x078)
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#define CM_PER_TIMER7_CLKCTRL (CM_PER + 0x07C)
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#define CM_PER_TIMER2_CLKCTRL (CM_PER + 0x080)
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#define CM_PER_TIMER3_CLKCTRL (CM_PER + 0x084)
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#define CM_PER_TIMER4_CLKCTRL (CM_PER + 0x088)
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#define CM_PER_GPIO1_CLKCTRL (CM_PER + 0x0AC)
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#define CM_PER_GPIO2_CLKCTRL (CM_PER + 0x0B0)
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#define CM_PER_GPIO3_CLKCTRL (CM_PER + 0x0B4)
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#define CM_PER_TPCC_CLKCTRL (CM_PER + 0x0BC)
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#define CM_PER_EPWMSS1_CLKCTRL (CM_PER + 0x0CC)
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#define CM_PER_EPWMSS0_CLKCTRL (CM_PER + 0x0D4)
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#define CM_PER_EPWMSS2_CLKCTRL (CM_PER + 0x0D8)
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#define CM_PER_L3_INSTR_CLKCTRL (CM_PER + 0x0DC)
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#define CM_PER_L3_CLKCTRL (CM_PER + 0x0E0)
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#define CM_PER_PRUSS_CLKCTRL (CM_PER + 0x0E8)
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#define CM_PER_TIMER5_CLKCTRL (CM_PER + 0x0EC)
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#define CM_PER_TIMER6_CLKCTRL (CM_PER + 0x0F0)
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#define CM_PER_MMC1_CLKCTRL (CM_PER + 0x0F4)
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#define CM_PER_MMC2_CLKCTRL (CM_PER + 0x0F8)
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#define CM_PER_TPTC1_CLKCTRL (CM_PER + 0x0FC)
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#define CM_PER_TPTC2_CLKCTRL (CM_PER + 0x100)
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#define CM_PER_SPINLOCK0_CLKCTRL (CM_PER + 0x10C)
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#define CM_PER_MAILBOX0_CLKCTRL (CM_PER + 0x110)
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#define CM_PER_OCPWP_L3_CLKSTCTRL (CM_PER + 0x12C)
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#define CM_PER_OCPWP_CLKCTRL (CM_PER + 0x130)
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#define CM_PER_CPSW_CLKSTCTRL (CM_PER + 0x144)
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#define CM_PER_PRUSS_CLKSTCTRL (CM_PER + 0x140)
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#define CM_WKUP 0x400
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#define CM_WKUP_CLKSTCTRL (CM_WKUP + 0x000)
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#define CM_WKUP_CONTROL_CLKCTRL (CM_WKUP + 0x004)
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#define CM_WKUP_GPIO0_CLKCTRL (CM_WKUP + 0x008)
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#define CM_WKUP_CM_L3_AON_CLKSTCTRL (CM_WKUP + 0x01C)
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#define CM_WKUP_CM_CLKSEL_DPLL_MPU (CM_WKUP + 0x02C)
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#define CM_WKUP_CM_IDLEST_DPLL_DISP (CM_WKUP + 0x048)
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#define CM_WKUP_CM_CLKSEL_DPLL_DISP (CM_WKUP + 0x054)
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#define CM_WKUP_CM_CLKDCOLDO_DPLL_PER (CM_WKUP + 0x07C)
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#define CM_WKUP_CM_CLKMODE_DPLL_DISP (CM_WKUP + 0x098)
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#define CM_WKUP_I2C0_CLKCTRL (CM_WKUP + 0x0B8)
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#define CM_WKUP_ADC_TSC_CLKCTRL (CM_WKUP + 0x0BC)
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#define CM_DPLL 0x500
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#define CLKSEL_TIMER7_CLK (CM_DPLL + 0x004)
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#define CLKSEL_TIMER2_CLK (CM_DPLL + 0x008)
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#define CLKSEL_TIMER3_CLK (CM_DPLL + 0x00C)
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#define CLKSEL_TIMER4_CLK (CM_DPLL + 0x010)
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#define CLKSEL_TIMER5_CLK (CM_DPLL + 0x018)
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#define CLKSEL_TIMER6_CLK (CM_DPLL + 0x01C)
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#define CLKSEL_PRUSS_OCP_CLK (CM_DPLL + 0x030)
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#define PRM_PER 0xC00
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#define PRM_PER_RSTCTRL (PRM_PER + 0x00)
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#define PRM_DEVICE_OFFSET 0xF00
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#define PRM_RSTCTRL (PRM_DEVICE_OFFSET + 0x00)
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struct am335x_prcm_softc {
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struct resource * res[2];
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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};
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static struct resource_spec am335x_prcm_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static struct am335x_prcm_softc *am335x_prcm_sc = NULL;
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static int am335x_clk_noop_activate(struct ti_clock_dev *clkdev);
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static int am335x_clk_generic_activate(struct ti_clock_dev *clkdev);
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static int am335x_clk_gpio_activate(struct ti_clock_dev *clkdev);
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static int am335x_clk_noop_deactivate(struct ti_clock_dev *clkdev);
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static int am335x_clk_generic_deactivate(struct ti_clock_dev *clkdev);
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static int am335x_clk_noop_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc);
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static int am335x_clk_generic_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc);
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static int am335x_clk_hsmmc_get_source_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
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static int am335x_clk_get_sysclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
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static int am335x_clk_get_arm_fclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
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static int am335x_clk_get_arm_disp_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
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static void am335x_prcm_reset(void);
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static int am335x_clk_cpsw_activate(struct ti_clock_dev *clkdev);
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static int am335x_clk_musb0_activate(struct ti_clock_dev *clkdev);
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static int am335x_clk_lcdc_activate(struct ti_clock_dev *clkdev);
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static int am335x_clk_pruss_activate(struct ti_clock_dev *clkdev);
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#define AM335X_NOOP_CLOCK_DEV(i) \
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{ .id = (i), \
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.clk_activate = am335x_clk_noop_activate, \
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.clk_deactivate = am335x_clk_noop_deactivate, \
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.clk_set_source = am335x_clk_noop_set_source, \
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.clk_accessible = NULL, \
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.clk_get_source_freq = NULL \
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}
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#define AM335X_GENERIC_CLOCK_DEV(i) \
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{ .id = (i), \
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.clk_activate = am335x_clk_generic_activate, \
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.clk_deactivate = am335x_clk_generic_deactivate, \
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.clk_set_source = am335x_clk_generic_set_source, \
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.clk_accessible = NULL, \
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.clk_get_source_freq = NULL \
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}
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#define AM335X_GPIO_CLOCK_DEV(i) \
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{ .id = (i), \
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.clk_activate = am335x_clk_gpio_activate, \
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.clk_deactivate = am335x_clk_generic_deactivate, \
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.clk_set_source = am335x_clk_generic_set_source, \
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.clk_accessible = NULL, \
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.clk_get_source_freq = NULL \
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}
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#define AM335X_MMCHS_CLOCK_DEV(i) \
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{ .id = (i), \
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.clk_activate = am335x_clk_generic_activate, \
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.clk_deactivate = am335x_clk_generic_deactivate, \
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.clk_set_source = am335x_clk_generic_set_source, \
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.clk_accessible = NULL, \
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.clk_get_source_freq = am335x_clk_hsmmc_get_source_freq \
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}
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struct ti_clock_dev ti_am335x_clk_devmap[] = {
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/* System clocks */
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{ .id = SYS_CLK,
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.clk_activate = NULL,
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.clk_deactivate = NULL,
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.clk_set_source = NULL,
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.clk_accessible = NULL,
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.clk_get_source_freq = am335x_clk_get_sysclk_freq,
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},
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/* MPU (ARM) core clocks */
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{ .id = MPU_CLK,
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.clk_activate = NULL,
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.clk_deactivate = NULL,
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.clk_set_source = NULL,
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.clk_accessible = NULL,
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.clk_get_source_freq = am335x_clk_get_arm_fclk_freq,
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},
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/* CPSW Ethernet Switch core clocks */
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{ .id = CPSW_CLK,
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.clk_activate = am335x_clk_cpsw_activate,
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.clk_deactivate = NULL,
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.clk_set_source = NULL,
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.clk_accessible = NULL,
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.clk_get_source_freq = NULL,
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},
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/* Mentor USB HS controller core clocks */
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{ .id = MUSB0_CLK,
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.clk_activate = am335x_clk_musb0_activate,
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.clk_deactivate = NULL,
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.clk_set_source = NULL,
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.clk_accessible = NULL,
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.clk_get_source_freq = NULL,
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},
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/* LCD controller clocks */
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{ .id = LCDC_CLK,
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.clk_activate = am335x_clk_lcdc_activate,
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.clk_deactivate = NULL,
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.clk_set_source = NULL,
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.clk_accessible = NULL,
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.clk_get_source_freq = am335x_clk_get_arm_disp_freq,
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},
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/* UART. Uart0 clock cannot be controlled. */
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AM335X_NOOP_CLOCK_DEV(UART0_CLK),
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AM335X_GENERIC_CLOCK_DEV(UART1_CLK),
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AM335X_GENERIC_CLOCK_DEV(UART2_CLK),
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AM335X_GENERIC_CLOCK_DEV(UART3_CLK),
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AM335X_GENERIC_CLOCK_DEV(UART4_CLK),
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AM335X_GENERIC_CLOCK_DEV(UART5_CLK),
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/* DMTimer */
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AM335X_GENERIC_CLOCK_DEV(DMTIMER2_CLK),
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AM335X_GENERIC_CLOCK_DEV(DMTIMER3_CLK),
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AM335X_GENERIC_CLOCK_DEV(DMTIMER4_CLK),
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AM335X_GENERIC_CLOCK_DEV(DMTIMER5_CLK),
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AM335X_GENERIC_CLOCK_DEV(DMTIMER6_CLK),
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AM335X_GENERIC_CLOCK_DEV(DMTIMER7_CLK),
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/* GPIO */
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AM335X_GPIO_CLOCK_DEV(GPIO0_CLK),
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AM335X_GPIO_CLOCK_DEV(GPIO1_CLK),
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AM335X_GPIO_CLOCK_DEV(GPIO2_CLK),
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AM335X_GPIO_CLOCK_DEV(GPIO3_CLK),
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/* I2C */
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AM335X_GENERIC_CLOCK_DEV(I2C0_CLK),
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AM335X_GENERIC_CLOCK_DEV(I2C1_CLK),
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AM335X_GENERIC_CLOCK_DEV(I2C2_CLK),
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/* TSC_ADC */
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AM335X_GENERIC_CLOCK_DEV(TSC_ADC_CLK),
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/* EDMA */
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AM335X_GENERIC_CLOCK_DEV(EDMA_TPCC_CLK),
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AM335X_GENERIC_CLOCK_DEV(EDMA_TPTC0_CLK),
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AM335X_GENERIC_CLOCK_DEV(EDMA_TPTC1_CLK),
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AM335X_GENERIC_CLOCK_DEV(EDMA_TPTC2_CLK),
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/* MMCHS */
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AM335X_MMCHS_CLOCK_DEV(MMC0_CLK),
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AM335X_MMCHS_CLOCK_DEV(MMC1_CLK),
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AM335X_MMCHS_CLOCK_DEV(MMC2_CLK),
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/* PWMSS */
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AM335X_GENERIC_CLOCK_DEV(PWMSS0_CLK),
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AM335X_GENERIC_CLOCK_DEV(PWMSS1_CLK),
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AM335X_GENERIC_CLOCK_DEV(PWMSS2_CLK),
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/* System Mailbox clock */
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AM335X_GENERIC_CLOCK_DEV(MAILBOX0_CLK),
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/* SPINLOCK */
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AM335X_GENERIC_CLOCK_DEV(SPINLOCK0_CLK),
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/* PRU-ICSS */
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{ .id = PRUSS_CLK,
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.clk_activate = am335x_clk_pruss_activate,
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.clk_deactivate = NULL,
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.clk_set_source = NULL,
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.clk_accessible = NULL,
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.clk_get_source_freq = NULL,
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},
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{ INVALID_CLK_IDENT, NULL, NULL, NULL, NULL }
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};
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struct am335x_clk_details {
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clk_ident_t id;
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uint32_t clkctrl_reg;
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uint32_t clksel_reg;
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};
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#define _CLK_DETAIL(i, c, s) \
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{ .id = (i), \
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.clkctrl_reg = (c), \
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.clksel_reg = (s), \
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}
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static struct am335x_clk_details g_am335x_clk_details[] = {
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/* UART. UART0 clock not controllable. */
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_CLK_DETAIL(UART0_CLK, 0, 0),
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_CLK_DETAIL(UART1_CLK, CM_PER_UART1_CLKCTRL, 0),
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_CLK_DETAIL(UART2_CLK, CM_PER_UART2_CLKCTRL, 0),
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_CLK_DETAIL(UART3_CLK, CM_PER_UART3_CLKCTRL, 0),
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_CLK_DETAIL(UART4_CLK, CM_PER_UART4_CLKCTRL, 0),
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_CLK_DETAIL(UART5_CLK, CM_PER_UART5_CLKCTRL, 0),
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/* DMTimer modules */
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_CLK_DETAIL(DMTIMER2_CLK, CM_PER_TIMER2_CLKCTRL, CLKSEL_TIMER2_CLK),
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_CLK_DETAIL(DMTIMER3_CLK, CM_PER_TIMER3_CLKCTRL, CLKSEL_TIMER3_CLK),
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_CLK_DETAIL(DMTIMER4_CLK, CM_PER_TIMER4_CLKCTRL, CLKSEL_TIMER4_CLK),
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_CLK_DETAIL(DMTIMER5_CLK, CM_PER_TIMER5_CLKCTRL, CLKSEL_TIMER5_CLK),
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_CLK_DETAIL(DMTIMER6_CLK, CM_PER_TIMER6_CLKCTRL, CLKSEL_TIMER6_CLK),
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_CLK_DETAIL(DMTIMER7_CLK, CM_PER_TIMER7_CLKCTRL, CLKSEL_TIMER7_CLK),
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/* GPIO modules */
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_CLK_DETAIL(GPIO0_CLK, CM_WKUP_GPIO0_CLKCTRL, 0),
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_CLK_DETAIL(GPIO1_CLK, CM_PER_GPIO1_CLKCTRL, 0),
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_CLK_DETAIL(GPIO2_CLK, CM_PER_GPIO2_CLKCTRL, 0),
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_CLK_DETAIL(GPIO3_CLK, CM_PER_GPIO3_CLKCTRL, 0),
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/* I2C modules */
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_CLK_DETAIL(I2C0_CLK, CM_WKUP_I2C0_CLKCTRL, 0),
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_CLK_DETAIL(I2C1_CLK, CM_PER_I2C1_CLKCTRL, 0),
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_CLK_DETAIL(I2C2_CLK, CM_PER_I2C2_CLKCTRL, 0),
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/* TSC_ADC module */
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_CLK_DETAIL(TSC_ADC_CLK, CM_WKUP_ADC_TSC_CLKCTRL, 0),
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/* EDMA modules */
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_CLK_DETAIL(EDMA_TPCC_CLK, CM_PER_TPCC_CLKCTRL, 0),
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_CLK_DETAIL(EDMA_TPTC0_CLK, CM_PER_TPTC0_CLKCTRL, 0),
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_CLK_DETAIL(EDMA_TPTC1_CLK, CM_PER_TPTC1_CLKCTRL, 0),
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_CLK_DETAIL(EDMA_TPTC2_CLK, CM_PER_TPTC2_CLKCTRL, 0),
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/* MMCHS modules*/
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_CLK_DETAIL(MMC0_CLK, CM_PER_MMC0_CLKCTRL, 0),
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_CLK_DETAIL(MMC1_CLK, CM_PER_MMC1_CLKCTRL, 0),
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_CLK_DETAIL(MMC2_CLK, CM_PER_MMC1_CLKCTRL, 0),
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/* PWMSS modules */
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_CLK_DETAIL(PWMSS0_CLK, CM_PER_EPWMSS0_CLKCTRL, 0),
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_CLK_DETAIL(PWMSS1_CLK, CM_PER_EPWMSS1_CLKCTRL, 0),
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_CLK_DETAIL(PWMSS2_CLK, CM_PER_EPWMSS2_CLKCTRL, 0),
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_CLK_DETAIL(MAILBOX0_CLK, CM_PER_MAILBOX0_CLKCTRL, 0),
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_CLK_DETAIL(SPINLOCK0_CLK, CM_PER_SPINLOCK0_CLKCTRL, 0),
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{ INVALID_CLK_IDENT, 0},
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};
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/* Read/Write macros */
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#define prcm_read_4(reg) \
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bus_space_read_4(am335x_prcm_sc->bst, am335x_prcm_sc->bsh, reg)
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#define prcm_write_4(reg, val) \
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bus_space_write_4(am335x_prcm_sc->bst, am335x_prcm_sc->bsh, reg, val)
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void am335x_prcm_setup_dmtimer(int);
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static int
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am335x_prcm_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_is_compatible(dev, "am335x,prcm")) {
|
|
device_set_desc(dev, "AM335x Power and Clock Management");
|
|
return(BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
static int
|
|
am335x_prcm_attach(device_t dev)
|
|
{
|
|
struct am335x_prcm_softc *sc = device_get_softc(dev);
|
|
unsigned int sysclk, fclk;
|
|
|
|
if (am335x_prcm_sc)
|
|
return (ENXIO);
|
|
|
|
if (bus_alloc_resources(dev, am335x_prcm_spec, sc->res)) {
|
|
device_printf(dev, "could not allocate resources\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
sc->bst = rman_get_bustag(sc->res[0]);
|
|
sc->bsh = rman_get_bushandle(sc->res[0]);
|
|
|
|
am335x_prcm_sc = sc;
|
|
ti_cpu_reset = am335x_prcm_reset;
|
|
|
|
am335x_clk_get_sysclk_freq(NULL, &sysclk);
|
|
am335x_clk_get_arm_fclk_freq(NULL, &fclk);
|
|
device_printf(dev, "Clocks: System %u.%01u MHz, CPU %u MHz\n",
|
|
sysclk/1000000, (sysclk % 1000000)/100000, fclk/1000000);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t am335x_prcm_methods[] = {
|
|
DEVMETHOD(device_probe, am335x_prcm_probe),
|
|
DEVMETHOD(device_attach, am335x_prcm_attach),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t am335x_prcm_driver = {
|
|
"am335x_prcm",
|
|
am335x_prcm_methods,
|
|
sizeof(struct am335x_prcm_softc),
|
|
};
|
|
|
|
static devclass_t am335x_prcm_devclass;
|
|
|
|
DRIVER_MODULE(am335x_prcm, simplebus, am335x_prcm_driver,
|
|
am335x_prcm_devclass, 0, 0);
|
|
MODULE_DEPEND(am335x_prcm, ti_scm, 1, 1, 1);
|
|
|
|
static struct am335x_clk_details*
|
|
am335x_clk_details(clk_ident_t id)
|
|
{
|
|
struct am335x_clk_details *walker;
|
|
|
|
for (walker = g_am335x_clk_details; walker->id != INVALID_CLK_IDENT; walker++) {
|
|
if (id == walker->id)
|
|
return (walker);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
am335x_clk_noop_activate(struct ti_clock_dev *clkdev)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_generic_activate(struct ti_clock_dev *clkdev)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
struct am335x_clk_details* clk_details;
|
|
|
|
if (sc == NULL)
|
|
return ENXIO;
|
|
|
|
clk_details = am335x_clk_details(clkdev->id);
|
|
|
|
if (clk_details == NULL)
|
|
return (ENXIO);
|
|
|
|
/* set *_CLKCTRL register MODULEMODE[1:0] to enable(2) */
|
|
prcm_write_4(clk_details->clkctrl_reg, 2);
|
|
while ((prcm_read_4(clk_details->clkctrl_reg) & 0x3) != 2)
|
|
DELAY(10);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_gpio_activate(struct ti_clock_dev *clkdev)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
struct am335x_clk_details* clk_details;
|
|
|
|
if (sc == NULL)
|
|
return ENXIO;
|
|
|
|
clk_details = am335x_clk_details(clkdev->id);
|
|
|
|
if (clk_details == NULL)
|
|
return (ENXIO);
|
|
|
|
/* set *_CLKCTRL register MODULEMODE[1:0] to enable(2) */
|
|
/* set *_CLKCTRL register OPTFCLKEN_GPIO_1_G DBCLK[18] to FCLK_EN(1) */
|
|
prcm_write_4(clk_details->clkctrl_reg, 2 | (1 << 18));
|
|
while ((prcm_read_4(clk_details->clkctrl_reg) &
|
|
(3 | (1 << 18) )) != (2 | (1 << 18)))
|
|
DELAY(10);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_noop_deactivate(struct ti_clock_dev *clkdev)
|
|
{
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_generic_deactivate(struct ti_clock_dev *clkdev)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
struct am335x_clk_details* clk_details;
|
|
|
|
if (sc == NULL)
|
|
return ENXIO;
|
|
|
|
clk_details = am335x_clk_details(clkdev->id);
|
|
|
|
if (clk_details == NULL)
|
|
return (ENXIO);
|
|
|
|
/* set *_CLKCTRL register MODULEMODE[1:0] to disable(0) */
|
|
prcm_write_4(clk_details->clkctrl_reg, 0);
|
|
while ((prcm_read_4(clk_details->clkctrl_reg) & 0x3) != 0)
|
|
DELAY(10);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_noop_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_generic_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
struct am335x_clk_details* clk_details;
|
|
uint32_t reg;
|
|
|
|
if (sc == NULL)
|
|
return ENXIO;
|
|
|
|
clk_details = am335x_clk_details(clkdev->id);
|
|
|
|
if (clk_details == NULL)
|
|
return (ENXIO);
|
|
|
|
switch (clksrc) {
|
|
case EXT_CLK:
|
|
reg = 0; /* SEL2: TCLKIN clock */
|
|
break;
|
|
case SYSCLK_CLK:
|
|
reg = 1; /* SEL1: CLK_M_OSC clock */
|
|
break;
|
|
case F32KHZ_CLK:
|
|
reg = 2; /* SEL3: CLK_32KHZ clock */
|
|
break;
|
|
default:
|
|
return (ENXIO);
|
|
}
|
|
|
|
prcm_write_4(clk_details->clksel_reg, reg);
|
|
while ((prcm_read_4(clk_details->clksel_reg) & 0x3) != reg)
|
|
DELAY(10);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_hsmmc_get_source_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
|
|
{
|
|
*freq = 96000000;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_get_sysclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
|
|
{
|
|
uint32_t ctrl_status;
|
|
|
|
/* Read the input clock freq from the control module */
|
|
/* control_status reg (0x40) */
|
|
if (ti_scm_reg_read_4(0x40, &ctrl_status))
|
|
return ENXIO;
|
|
|
|
switch ((ctrl_status>>22) & 0x3) {
|
|
case 0x0:
|
|
/* 19.2Mhz */
|
|
*freq = 19200000;
|
|
break;
|
|
case 0x1:
|
|
/* 24Mhz */
|
|
*freq = 24000000;
|
|
break;
|
|
case 0x2:
|
|
/* 25Mhz */
|
|
*freq = 25000000;
|
|
break;
|
|
case 0x3:
|
|
/* 26Mhz */
|
|
*freq = 26000000;
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
#define DPLL_BYP_CLKSEL(reg) ((reg>>23) & 1)
|
|
#define DPLL_DIV(reg) ((reg & 0x7f)+1)
|
|
#define DPLL_MULT(reg) ((reg>>8) & 0x7FF)
|
|
|
|
static int
|
|
am335x_clk_get_arm_fclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
|
|
{
|
|
uint32_t reg;
|
|
uint32_t sysclk;
|
|
|
|
reg = prcm_read_4(CM_WKUP_CM_CLKSEL_DPLL_MPU);
|
|
|
|
/*Check if we are running in bypass */
|
|
if (DPLL_BYP_CLKSEL(reg))
|
|
return ENXIO;
|
|
|
|
am335x_clk_get_sysclk_freq(NULL, &sysclk);
|
|
*freq = DPLL_MULT(reg) * (sysclk / DPLL_DIV(reg));
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_get_arm_disp_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
|
|
{
|
|
uint32_t reg;
|
|
uint32_t sysclk;
|
|
|
|
reg = prcm_read_4(CM_WKUP_CM_CLKSEL_DPLL_DISP);
|
|
|
|
/*Check if we are running in bypass */
|
|
if (DPLL_BYP_CLKSEL(reg))
|
|
return ENXIO;
|
|
|
|
am335x_clk_get_sysclk_freq(NULL, &sysclk);
|
|
*freq = DPLL_MULT(reg) * (sysclk / DPLL_DIV(reg));
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
am335x_prcm_reset(void)
|
|
{
|
|
prcm_write_4(PRM_RSTCTRL, (1<<1));
|
|
}
|
|
|
|
static int
|
|
am335x_clk_cpsw_activate(struct ti_clock_dev *clkdev)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
|
|
if (sc == NULL)
|
|
return ENXIO;
|
|
|
|
/* set MODULENAME to ENABLE */
|
|
prcm_write_4(CM_PER_CPGMAC0_CLKCTRL, 2);
|
|
|
|
/* wait for IDLEST to become Func(0) */
|
|
while(prcm_read_4(CM_PER_CPGMAC0_CLKCTRL) & (3<<16));
|
|
|
|
/*set CLKTRCTRL to SW_WKUP(2) */
|
|
prcm_write_4(CM_PER_CPSW_CLKSTCTRL, 2);
|
|
|
|
/* wait for 125 MHz OCP clock to become active */
|
|
while((prcm_read_4(CM_PER_CPSW_CLKSTCTRL) & (1<<4)) == 0);
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_musb0_activate(struct ti_clock_dev *clkdev)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
|
|
if (sc == NULL)
|
|
return ENXIO;
|
|
|
|
/* set ST_DPLL_CLKDCOLDO(9) to CLK_GATED(1) */
|
|
/* set DPLL_CLKDCOLDO_GATE_CTRL(8) to CLK_ENABLE(1)*/
|
|
prcm_write_4(CM_WKUP_CM_CLKDCOLDO_DPLL_PER, 0x300);
|
|
|
|
/*set MODULEMODE to ENABLE(2) */
|
|
prcm_write_4(CM_PER_USB0_CLKCTRL, 2);
|
|
|
|
/* wait for MODULEMODE to become ENABLE(2) */
|
|
while ((prcm_read_4(CM_PER_USB0_CLKCTRL) & 0x3) != 2)
|
|
DELAY(10);
|
|
|
|
/* wait for IDLEST to become Func(0) */
|
|
while(prcm_read_4(CM_PER_USB0_CLKCTRL) & (3<<16))
|
|
DELAY(10);
|
|
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_lcdc_activate(struct ti_clock_dev *clkdev)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
/* Bypass mode */
|
|
prcm_write_4(CM_WKUP_CM_CLKMODE_DPLL_DISP, 0x4);
|
|
|
|
/* Make sure it's in bypass mode */
|
|
while (!(prcm_read_4(CM_WKUP_CM_IDLEST_DPLL_DISP)
|
|
& (1 << 8)))
|
|
DELAY(10);
|
|
|
|
/*
|
|
* For now set frequency to 5xSYSFREQ
|
|
* More flexible control might be required
|
|
*/
|
|
prcm_write_4(CM_WKUP_CM_CLKSEL_DPLL_DISP, (5 << 8) | 0);
|
|
|
|
/* Locked mode */
|
|
prcm_write_4(CM_WKUP_CM_CLKMODE_DPLL_DISP, 0x7);
|
|
|
|
int timeout = 10000;
|
|
while ((!(prcm_read_4(CM_WKUP_CM_IDLEST_DPLL_DISP)
|
|
& (1 << 0))) && timeout--)
|
|
DELAY(10);
|
|
|
|
/*set MODULEMODE to ENABLE(2) */
|
|
prcm_write_4(CM_PER_LCDC_CLKCTRL, 2);
|
|
|
|
/* wait for MODULEMODE to become ENABLE(2) */
|
|
while ((prcm_read_4(CM_PER_LCDC_CLKCTRL) & 0x3) != 2)
|
|
DELAY(10);
|
|
|
|
/* wait for IDLEST to become Func(0) */
|
|
while(prcm_read_4(CM_PER_LCDC_CLKCTRL) & (3<<16))
|
|
DELAY(10);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
am335x_clk_pruss_activate(struct ti_clock_dev *clkdev)
|
|
{
|
|
struct am335x_prcm_softc *sc = am335x_prcm_sc;
|
|
|
|
if (sc == NULL)
|
|
return (ENXIO);
|
|
|
|
/* Set MODULEMODE to ENABLE(2) */
|
|
prcm_write_4(CM_PER_PRUSS_CLKCTRL, 2);
|
|
|
|
/* Wait for MODULEMODE to become ENABLE(2) */
|
|
while ((prcm_read_4(CM_PER_PRUSS_CLKCTRL) & 0x3) != 2)
|
|
DELAY(10);
|
|
|
|
/* Set CLKTRCTRL to SW_WKUP(2) */
|
|
prcm_write_4(CM_PER_PRUSS_CLKSTCTRL, 2);
|
|
|
|
/* Wait for the 200 MHz OCP clock to become active */
|
|
while ((prcm_read_4(CM_PER_PRUSS_CLKSTCTRL) & (1<<4)) == 0)
|
|
DELAY(10);
|
|
|
|
/* Wait for the 200 MHz IEP clock to become active */
|
|
while ((prcm_read_4(CM_PER_PRUSS_CLKSTCTRL) & (1<<5)) == 0)
|
|
DELAY(10);
|
|
|
|
/* Wait for the 192 MHz UART clock to become active */
|
|
while ((prcm_read_4(CM_PER_PRUSS_CLKSTCTRL) & (1<<6)) == 0)
|
|
DELAY(10);
|
|
|
|
/* Select DISP DPLL as OCP clock */
|
|
prcm_write_4(CLKSEL_PRUSS_OCP_CLK, 1);
|
|
while ((prcm_read_4(CLKSEL_PRUSS_OCP_CLK) & 0x3) != 1)
|
|
DELAY(10);
|
|
|
|
/* Clear the RESET bit */
|
|
prcm_write_4(PRM_PER_RSTCTRL, prcm_read_4(PRM_PER_RSTCTRL) & ~2);
|
|
|
|
return (0);
|
|
}
|