/*
* OMAP2/3 CM module functions
*
* Copyright (C) 2009 Nokia Corporation
* Paul Walmsley
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/io.h>
#include <plat/common.h>
#include "cm.h"
#include "cm2xxx_3xxx.h"
#include "cm-regbits-24xx.h"
#include "cm-regbits-34xx.h"
static const u8 cm_idlest_offs[] = {
CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3
};
u32 cm_read_mod_reg(s16 module, u16 idx)
{
return __raw_readl(cm_base + module + idx);
}
void cm_write_mod_reg(u32 val, s16 module, u16 idx)
{
__raw_writel(val, cm_base + module + idx);
}
/* Read-modify-write a register in a CM module. Caller must lock */
u32 cm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx)
{
u32 v;
v = cm_read_mod_reg(module, idx);
v &= ~mask;
v |= bits;
cm_write_mod_reg(v, module, idx);
return v;
}
u32 cm_set_mod_reg_bits(u32 bits, s16 module, s16 idx)
{
return cm_rmw_mod_reg_bits(bits, bits, module, idx);
}
u32 cm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
{
return cm_rmw_mod_reg_bits(bits, 0x0, module, idx);
}
/**
* omap2_cm_wait_idlest_ready - wait for a module to leave idle or standby
* @prcm_mod: PRCM module offset
* @idlest_id: CM_IDLESTx register ID (i.e., x = 1, 2, 3)
* @idlest_shift: shift of the bit in the CM_IDLEST* register to check
*
* XXX document
*/
int omap2_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift)
{
int ena = 0, i = 0;
u8 cm_idlest_reg;
u32 mask;
if (!idlest_id || (idlest_id > ARRAY_SIZE(cm_idlest_offs)))
return -EINVAL;
cm_idlest_reg = cm_idlest_offs[idlest_id - 1];
mask = 1 << idlest_shift;
if (cpu_is_omap24xx())
ena = mask;
else if (cpu_is_omap34xx())
ena = 0;
else
BUG();
omap_test_timeout(((cm_read_mod_reg(prcm_mod, cm_idlest_reg) & mask) == ena),
MAX_MODULE_READY_TIME, i);
return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
}
/*
* Context save/restore code - OMAP3 only
*/
#ifdef CONFIG_ARCH_OMAP3
struct omap3_cm_regs {
u32 iva2_cm_clksel1;
u32 iva2_cm_clksel2;
u32 cm_sysconfig;
u32 sgx_cm_clksel;
u32 dss_cm_clksel;
u32 cam_cm_clksel;
u32 per_cm_clksel;
u32 emu_cm_clksel;
u32 emu_cm_clkstctrl;
u32 pll_cm_autoidle2;
u32 pll_cm_clksel4;
u32 pll_cm_clksel5;
u32 pll_cm_clken2;
u32 cm_polctrl;
u32 iva2_cm_fclken;
u32 iva2_cm_clken_pll;
u32 core_cm_fclken1;
u32 core_cm_fclken3;
u32 sgx_cm_fclken;
u32 wkup_cm_fclken;
u32 dss_cm_fclken;
u32 cam_cm_fclken;
u32 per_cm_fclken;
u32 usbhost_cm_fclken;
u32 core_cm_iclken1;
u32 core_cm_iclken2;
u32 core_cm_iclken3;
u32 sgx_cm_iclken;
u32 wkup_cm_iclken;
u32 dss_cm_iclken;
u32 cam_cm_iclken;
u32 per_cm_iclken;
u32 usbhost_cm_iclken;
u32 iva2_cm_autoidle2;
u32 mpu_cm_autoidle2;
u32 iva2_cm_clkstctrl;
u32 mpu_cm_clkstctrl;
u32 core_cm_clkstctrl;
u32 sgx_cm_clkstctrl;
u32 dss_cm_clkstctrl;
u32 cam_cm_clkstctrl;
u32 per_cm_clkstctrl;
u32 neon_cm_clkstctrl;
u32 usbhost_cm_clkstctrl;
u32 core_cm_autoidle1;
u32 core_cm_autoidle2;
u32 core_cm_autoidle3;
u32 wkup_cm_autoidle;
u32 dss_cm_autoidle;
u32 cam_cm_autoidle;
u32 per_cm_autoidle;
u32 usbhost_cm_autoidle;
u32 sgx_cm_sleepdep;
u32 dss_cm_sleepdep;
u32 cam_cm_sleepdep;
u32 per_cm_sleepdep;
u32 usbhost_cm_sleepdep;
u32 cm_clkout_ctrl;
};
static struct omap3_cm_regs cm_context;
void omap3_cm_save_context(void)
{
cm_context.iva2_cm_clksel1 =
cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_CLKSEL1);
cm_context.iva2_cm_clksel2 =
cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_CLKSEL2);
cm_context.cm_sysconfig = __raw_readl(OMAP3430_CM_SYSCONFIG);
cm_context.sgx_cm_clksel =
cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_CLKSEL);
cm_context.dss_cm_clksel =
cm_read_mod_reg(OMAP3430_DSS_MOD, CM_CLKSEL);
cm_context.cam_cm_clksel =
cm_read_mod_reg(OMAP3430_CAM_MOD, CM_CLKSEL);
cm_context.per_cm_clksel =
cm_read_mod_reg(OMAP3430_PER_MOD, CM_CLKSEL);
cm_context.emu_cm_clksel =
cm_read_mod_reg(OMAP3430_EMU_MOD, CM_CLKSEL1);
cm_context.emu_cm_clkstctrl =
cm_read_mod_reg(OMAP3430_EMU_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.pll_cm_autoidle2 =
cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE2);
cm_context.pll_cm_clksel4 =
cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKSEL4);
cm_context.pll_cm_clksel5 =
cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKSEL5);
cm_context.pll_cm_clken2 =
cm_read_mod_reg(PLL_MOD, OMAP3430ES2_CM_CLKEN2);
cm_context.cm_polctrl = __raw_readl(OMAP3430_CM_POLCTRL);
cm_context.iva2_cm_fclken =
cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_FCLKEN);
cm_context.iva2_cm_clken_pll = cm_read_mod_reg(OMAP3430_IVA2_MOD,
OMAP3430_CM_CLKEN_PLL);
cm_context.core_cm_fclken1 =
cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
cm_context.core_cm_fclken3 =
cm_read_mod_reg(CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
cm_context.sgx_cm_fclken =
cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_FCLKEN);
cm_context.wkup_cm_fclken =
cm_read_mod_reg(WKUP_MOD, CM_FCLKEN);
cm_context.dss_cm_fclken =
cm_read_mod_reg(OMAP3430_DSS_MOD, CM_FCLKEN);
cm_context.cam_cm_fclken =
cm_read_mod_reg(OMAP3430_CAM_MOD, CM_FCLKEN);
cm_context.per_cm_fclken =
cm_read_mod_reg(OMAP3430_PER_MOD, CM_FCLKEN);
cm_context.usbhost_cm_fclken =
cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_FCLKEN);
cm_context.core_cm_iclken1 =
cm_read_mod_reg(CORE_MOD, CM_ICLKEN1);
cm_context.core_cm_iclken2 =
cm_read_mod_reg(CORE_MOD, CM_ICLKEN2);
cm_context.core_cm_iclken3 =
cm_read_mod_reg(CORE_MOD, CM_ICLKEN3);
cm_context.sgx_cm_iclken =
cm_read_mod_reg(OMAP3430ES2_SGX_MOD, CM_ICLKEN);
cm_context.wkup_cm_iclken =
cm_read_mod_reg(WKUP_MOD, CM_ICLKEN);
cm_context.dss_cm_iclken =
cm_read_mod_reg(OMAP3430_DSS_MOD, CM_ICLKEN);
cm_context.cam_cm_iclken =
cm_read_mod_reg(OMAP3430_CAM_MOD, CM_ICLKEN);
cm_context.per_cm_iclken =
cm_read_mod_reg(OMAP3430_PER_MOD, CM_ICLKEN);
cm_context.usbhost_cm_iclken =
cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_ICLKEN);
cm_context.iva2_cm_autoidle2 =
cm_read_mod_reg(OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
cm_context.mpu_cm_autoidle2 =
cm_read_mod_reg(MPU_MOD, CM_AUTOIDLE2);
cm_context.iva2_cm_clkstctrl =
cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.mpu_cm_clkstctrl =
cm_read_mod_reg(MPU_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.core_cm_clkstctrl =
cm_read_mod_reg(CORE_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.sgx_cm_clkstctrl =
cm_read_mod_reg(OMAP3430ES2_SGX_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.dss_cm_clkstctrl =
cm_read_mod_reg(OMAP3430_DSS_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.cam_cm_clkstctrl =
cm_read_mod_reg(OMAP3430_CAM_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.per_cm_clkstctrl =
cm_read_mod_reg(OMAP3430_PER_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.neon_cm_clkstctrl =
cm_read_mod_reg(OMAP3430_NEON_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.usbhost_cm_clkstctrl =
cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, OMAP2_CM_CLKSTCTRL);
cm_context.core_cm_autoidle1 =
cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE1);
cm_context.core_cm_autoidle2 =
cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE2);
cm_context.core_cm_autoidle3 =
cm_read_mod_reg(CORE_MOD, CM_AUTOIDLE3);
cm_context.wkup_cm_autoidle =
cm_read_mod_reg(WKUP_MOD, CM_AUTOIDLE);
cm_context.dss_cm_autoidle =
cm_read_mod_reg(OMAP3430_DSS_MOD, CM_AUTOIDLE);
cm_context.cam_cm_autoidle =
cm_read_mod_reg(OMAP3430_CAM_MOD, CM_AUTOIDLE);
cm_context.per_cm_autoidle =
cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
cm_context.usbhost_cm_autoidle =
cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, CM_AUTOIDLE);
cm_context.sgx_cm_sleepdep =
cm_read_mod_reg(OMAP3430ES2_SGX_MOD, OMAP3430_CM_SLEEPDEP);
cm_context.dss_cm_sleepdep =
cm_read_mod_reg(OMAP3430_DSS_MOD, OMAP3430_CM_SLEEPDEP);
cm_context.cam_cm_sleepdep =
cm_read_mod_reg(OMAP3430_CAM_MOD, OMAP3430_CM_SLEEPDEP);
cm_context.per_cm_sleepdep =
cm_read_mod_reg(OMAP3430_PER_MOD, OMAP3430_CM_SLEEPDEP);
cm_context.usbhost_cm_sleepdep =
cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, OMAP3430_CM_SLEEPDEP);
cm_context.cm_clkout_ctrl =
cm_read_mod_reg(OMAP3430_CCR_MOD, OMAP3_CM_CLKOUT_CTRL_OFFSET);
}
void omap3_cm_restore_context(void)
{
cm_write_mod_reg(cm_context.iva2_cm_clksel1, OMAP3430_IVA2_MOD,
CM_CLKSEL1);
cm_write_mod_reg(cm_context.iva2_cm_clksel2, OMAP3430_IVA2_MOD,
CM_CLKSEL2);
__raw_writel(cm_context.cm_sysconfig, OMAP3430_CM_SYSCONFIG);
cm_write_mod_reg(cm_context.sgx_cm_clksel, OMAP3430ES2_SGX_MOD,
CM_CLKSEL);
cm_write_mod_reg(cm_context.dss_cm_clksel, OMAP3430_DSS_MOD,
CM_CLKSEL);
cm_write_mod_reg(cm_context.cam_cm_clksel, OMAP3430_CAM_MOD,
CM_CLKSEL);
cm_write_mod_reg(cm_context.per_cm_clksel, OMAP3430_PER_MOD,
CM_CLKSEL);
cm_write_mod_reg(cm_context.emu_cm_clksel, OMAP3430_EMU_MOD,
CM_CLKSEL1);
cm_write_mod_reg(cm_context.emu_cm_clkstctrl, OMAP3430_EMU_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.pll_cm_autoidle2, PLL_MOD,
CM_AUTOIDLE2);
cm_write_mod_reg(cm_context.pll_cm_clksel4, PLL_MOD,
OMAP3430ES2_CM_CLKSEL4);
cm_write_mod_reg(cm_context.pll_cm_clksel5, PLL_MOD,
OMAP3430ES2_CM_CLKSEL5);
cm_write_mod_reg(cm_context.pll_cm_clken2, PLL_MOD,
OMAP3430ES2_CM_CLKEN2);
__raw_writel(cm_context.cm_polctrl, OMAP3430_CM_POLCTRL);
cm_write_mod_reg(cm_context.iva2_cm_fclken, OMAP3430_IVA2_MOD,
CM_FCLKEN);
cm_write_mod_reg(cm_context.iva2_cm_clken_pll, OMAP3430_IVA2_MOD,
OMAP3430_CM_CLKEN_PLL);
cm_write_mod_reg(cm_context.core_cm_fclken1, CORE_MOD, CM_FCLKEN1);
cm_write_mod_reg(cm_context.core_cm_fclken3, CORE_MOD,
OMAP3430ES2_CM_FCLKEN3);
cm_write_mod_reg(cm_context.sgx_cm_fclken, OMAP3430ES2_SGX_MOD,
CM_FCLKEN);
cm_write_mod_reg(cm_context.wkup_cm_fclken, WKUP_MOD, CM_FCLKEN);
cm_write_mod_reg(cm_context.dss_cm_fclken, OMAP3430_DSS_MOD,
CM_FCLKEN);
cm_write_mod_reg(cm_context.cam_cm_fclken, OMAP3430_CAM_MOD,
CM_FCLKEN);
cm_write_mod_reg(cm_context.per_cm_fclken, OMAP3430_PER_MOD,
CM_FCLKEN);
cm_write_mod_reg(cm_context.usbhost_cm_fclken,
OMAP3430ES2_USBHOST_MOD, CM_FCLKEN);
cm_write_mod_reg(cm_context.core_cm_iclken1, CORE_MOD, CM_ICLKEN1);
cm_write_mod_reg(cm_context.core_cm_iclken2, CORE_MOD, CM_ICLKEN2);
cm_write_mod_reg(cm_context.core_cm_iclken3, CORE_MOD, CM_ICLKEN3);
cm_write_mod_reg(cm_context.sgx_cm_iclken, OMAP3430ES2_SGX_MOD,
CM_ICLKEN);
cm_write_mod_reg(cm_context.wkup_cm_iclken, WKUP_MOD, CM_ICLKEN);
cm_write_mod_reg(cm_context.dss_cm_iclken, OMAP3430_DSS_MOD,
CM_ICLKEN);
cm_write_mod_reg(cm_context.cam_cm_iclken, OMAP3430_CAM_MOD,
CM_ICLKEN);
cm_write_mod_reg(cm_context.per_cm_iclken, OMAP3430_PER_MOD,
CM_ICLKEN);
cm_write_mod_reg(cm_context.usbhost_cm_iclken,
OMAP3430ES2_USBHOST_MOD, CM_ICLKEN);
cm_write_mod_reg(cm_context.iva2_cm_autoidle2, OMAP3430_IVA2_MOD,
CM_AUTOIDLE2);
cm_write_mod_reg(cm_context.mpu_cm_autoidle2, MPU_MOD, CM_AUTOIDLE2);
cm_write_mod_reg(cm_context.iva2_cm_clkstctrl, OMAP3430_IVA2_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.mpu_cm_clkstctrl, MPU_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.core_cm_clkstctrl, CORE_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.sgx_cm_clkstctrl, OMAP3430ES2_SGX_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.dss_cm_clkstctrl, OMAP3430_DSS_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.cam_cm_clkstctrl, OMAP3430_CAM_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.per_cm_clkstctrl, OMAP3430_PER_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.neon_cm_clkstctrl, OMAP3430_NEON_MOD,
OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.usbhost_cm_clkstctrl,
OMAP3430ES2_USBHOST_MOD, OMAP2_CM_CLKSTCTRL);
cm_write_mod_reg(cm_context.core_cm_autoidle1, CORE_MOD,
CM_AUTOIDLE1);
cm_write_mod_reg(cm_context.core_cm_autoidle2, CORE_MOD,
CM_AUTOIDLE2);
cm_write_mod_reg(cm_context.core_cm_autoidle3, CORE_MOD,
CM_AUTOIDLE3);
cm_write_mod_reg(cm_context.wkup_cm_autoidle, WKUP_MOD, CM_AUTOIDLE);
cm_write_mod_reg(cm_context.dss_cm_autoidle, OMAP3430_DSS_MOD,
CM_AUTOIDLE);
cm_write_mod_reg(cm_context.cam_cm_autoidle, OMAP3430_CAM_MOD,
CM_AUTOIDLE);
cm_write_mod_reg(cm_context.per_cm_autoidle, OMAP3430_PER_MOD,
CM_AUTOIDLE);
cm_write_mod_reg(cm_context.usbhost_cm_autoidle,
OMAP3430ES2_USBHOST_MOD, CM_AUTOIDLE);
cm_write_mod_reg(cm_context.sgx_cm_sleepdep, OMAP3430ES2_SGX_MOD,
OMAP3430_CM_SLEEPDEP);
cm_write_mod_reg(cm_context.dss_cm_sleepdep, OMAP3430_DSS_MOD,
OMAP3430_CM_SLEEPDEP);
cm_write_mod_reg(cm_context.cam_cm_sleepdep, OMAP3430_CAM_MOD,
OMAP3430_CM_SLEEPDEP);
cm_write_mod_reg(cm_context.per_cm_sleepdep, OMAP3430_PER_MOD,
OMAP3430_CM_SLEEPDEP);
cm_write_mod_reg(cm_context.usbhost_cm_sleepdep,
OMAP3430ES2_USBHOST_MOD, OMAP3430_CM_SLEEPDEP);
cm_write_mod_reg(cm_context.cm_clkout_ctrl, OMAP3430_CCR_MOD,
OMAP3_CM_CLKOUT_CTRL_OFFSET);
}
#endif
