rockbox/firmware/target/arm/imx233/clkctrl-imx233.h

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright © 2011 by Amaury Pouly
 *
 * 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, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#ifndef CLKCTRL_IMX233_H
#define CLKCTRL_IMX233_H

#include "config.h"
#include "system.h"
#include "cpu.h"

#define HW_CLKCTRL_BASE     0x80040000

#define HW_CLKCTRL_PLLCTRL0 (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x0))
#define HW_CLKCTRL_PLLCTRL0__EN_USB_CLKS    (1 << 18)
#define HW_CLKCTRL_PLLCTRL0__DIV_SEL_BP     20
#define HW_CLKCTRL_PLLCTRL0__DIV_SEL_BM     (3 << 20)

#define HW_CLKCTRL_PLLCTRL1 (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x10))

#define HW_CLKCTRL_CPU      (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x20))
#define HW_CLKCTRL_CPU__DIV_CPU_BP  0
#define HW_CLKCTRL_CPU__DIV_CPU_BM  0x3f
#define HW_CLKCTRL_CPU__BUSY_REF_CPU    (1 << 28)

#define HW_CLKCTRL_HBUS     (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x30))
#define HW_CLKCTRL_HBUS__DIV_BP     0
#define HW_CLKCTRL_HBUS__DIV_BM     0x1f

#define HW_CLKCTRL_XBUS     (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x40))
#define HW_CLKCTRL_XBUS__DIV_BP     0
#define HW_CLKCTRL_XBUS__DIV_BM     0x3ff
#define HW_CLKCTRL_XBUS__BUSY       (1 << 31)

#define HW_CLKCTRL_XTAL     (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x50))
#define HW_CLKCTRL_XTAL__TIMROT_CLK32K_GATE (1 << 26)
#define HW_CLKCTRL_XTAL__DRI_CLK24M_GATE    (1 << 28)
#define HW_CLKCTRL_XTAL__FILT_CLK24M_GATE   (1 << 30)

#define HW_CLKCTRL_PIX      (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x60))
#define HW_CLKCTRL_PIX__DIV_BM  0xfff

#define HW_CLKCTRL_SSP      (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x70))
#define HW_CLKCTRL_SSP__DIV_BM  0x1ff

#define HW_CLKCTRL_CLKSEQ   (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x110))
#define HW_CLKCTRL_CLKSEQ__BYPASS_PIX   (1 << 1)
#define HW_CLKCTRL_CLKSEQ__BYPASS_SSP   (1 << 5)
#define HW_CLKCTRL_CLKSEQ__BYPASS_CPU   (1 << 7)

#define HW_CLKCTRL_FRAC     (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0xf0))
#define HW_CLKCTRL_FRAC_CPU (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf0))
#define HW_CLKCTRL_FRAC_EMI (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf1))
#define HW_CLKCTRL_FRAC_PIX (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf2))
#define HW_CLKCTRL_FRAC_IO  (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf3))
#define HW_CLKCTRL_FRAC_XX__XXDIV_BM    0x3f
#define HW_CLKCTRL_FRAC_XX__XX_STABLE   (1 << 6)
#define HW_CLKCTRL_FRAC_XX__CLKGATEXX   (1 << 7)

#define HW_CLKCTRL_RESET    (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x120))
#define HW_CLKCTRL_RESET_CHIP   0x2
#define HW_CLKCTRL_RESET_DIG    0x1

enum imx233_clock_t
{
    CLK_PIX, /* div, frac */
    CLK_SSP, /* div, frac */
    CLK_IO, /* div */
    CLK_CPU, /* div, frac */
    CLK_AHB /* div */
};

enum imx233_xtal_clkt_t
{
    XTAL_FILT = 1 << 30,
    XTAL_DRI = 1 << 28,
    XTAL_TIMROT = 1 << 26,
};

/* can use a mask of clocks */
void imx233_enable_xtal_clock(enum imx233_xtal_clkt_t xtal_clk, bool enable);
/* only use it for non-fractional clocks (ie not for IO) */
void imx233_enable_clock(enum imx233_clock_t clk, bool enable);
void imx233_set_clock_divisor(enum imx233_clock_t clk, int div);
/* call with fracdiv=0 to disable it */
void imx233_set_fractional_divisor(enum imx233_clock_t clk, int fracdiv);
void imx233_set_bypass_pll(enum imx233_clock_t clk, bool bypass);
void imx233_enable_usb_pll(bool enable);

#endif /* CLKCTRL_IMX233_H */