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linux-sg2042/arch/arm/mach-omap2/prm3xxx.c

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/*
* OMAP3xxx PRM module functions
*
* Copyright (C) 2010-2012 Texas Instruments, Inc.
* Copyright (C) 2010 Nokia Corporation
* Benoît Cousson
* Paul Walmsley
* Rajendra Nayak <rnayak@ti.com>
*
* 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/errno.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/of_irq.h>
#include "soc.h"
#include "common.h"
#include "vp.h"
#include "powerdomain.h"
#include "prm3xxx.h"
#include "prm2xxx_3xxx.h"
#include "cm2xxx_3xxx.h"
#include "prm-regbits-34xx.h"
#include "cm3xxx.h"
#include "cm-regbits-34xx.h"
#include "clock.h"
static void omap3xxx_prm_read_pending_irqs(unsigned long *events);
static void omap3xxx_prm_ocp_barrier(void);
static void omap3xxx_prm_save_and_clear_irqen(u32 *saved_mask);
static void omap3xxx_prm_restore_irqen(u32 *saved_mask);
static const struct omap_prcm_irq omap3_prcm_irqs[] = {
OMAP_PRCM_IRQ("wkup", 0, 0),
OMAP_PRCM_IRQ("io", 9, 1),
};
static struct omap_prcm_irq_setup omap3_prcm_irq_setup = {
.ack = OMAP3_PRM_IRQSTATUS_MPU_OFFSET,
.mask = OMAP3_PRM_IRQENABLE_MPU_OFFSET,
.nr_regs = 1,
.irqs = omap3_prcm_irqs,
.nr_irqs = ARRAY_SIZE(omap3_prcm_irqs),
.irq = 11 + OMAP_INTC_START,
.read_pending_irqs = &omap3xxx_prm_read_pending_irqs,
.ocp_barrier = &omap3xxx_prm_ocp_barrier,
.save_and_clear_irqen = &omap3xxx_prm_save_and_clear_irqen,
.restore_irqen = &omap3xxx_prm_restore_irqen,
.reconfigure_io_chain = NULL,
};
/*
* omap3_prm_reset_src_map - map from bits in the PRM_RSTST hardware
* register (which are specific to OMAP3xxx SoCs) to reset source ID
* bit shifts (which is an OMAP SoC-independent enumeration)
*/
static struct prm_reset_src_map omap3xxx_prm_reset_src_map[] = {
{ OMAP3430_GLOBAL_COLD_RST_SHIFT, OMAP_GLOBAL_COLD_RST_SRC_ID_SHIFT },
{ OMAP3430_GLOBAL_SW_RST_SHIFT, OMAP_GLOBAL_WARM_RST_SRC_ID_SHIFT },
{ OMAP3430_SECURITY_VIOL_RST_SHIFT, OMAP_SECU_VIOL_RST_SRC_ID_SHIFT },
{ OMAP3430_MPU_WD_RST_SHIFT, OMAP_MPU_WD_RST_SRC_ID_SHIFT },
{ OMAP3430_SECURE_WD_RST_SHIFT, OMAP_MPU_WD_RST_SRC_ID_SHIFT },
{ OMAP3430_EXTERNAL_WARM_RST_SHIFT, OMAP_EXTWARM_RST_SRC_ID_SHIFT },
{ OMAP3430_VDD1_VOLTAGE_MANAGER_RST_SHIFT,
OMAP_VDD_MPU_VM_RST_SRC_ID_SHIFT },
{ OMAP3430_VDD2_VOLTAGE_MANAGER_RST_SHIFT,
OMAP_VDD_CORE_VM_RST_SRC_ID_SHIFT },
{ OMAP3430_ICEPICK_RST_SHIFT, OMAP_ICEPICK_RST_SRC_ID_SHIFT },
{ OMAP3430_ICECRUSHER_RST_SHIFT, OMAP_ICECRUSHER_RST_SRC_ID_SHIFT },
{ -1, -1 },
};
/* PRM VP */
/*
* struct omap3_vp - OMAP3 VP register access description.
* @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg
*/
struct omap3_vp {
u32 tranxdone_status;
};
static struct omap3_vp omap3_vp[] = {
[OMAP3_VP_VDD_MPU_ID] = {
.tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK,
},
[OMAP3_VP_VDD_CORE_ID] = {
.tranxdone_status = OMAP3430_VP2_TRANXDONE_ST_MASK,
},
};
#define MAX_VP_ID ARRAY_SIZE(omap3_vp);
static u32 omap3_prm_vp_check_txdone(u8 vp_id)
{
struct omap3_vp *vp = &omap3_vp[vp_id];
u32 irqstatus;
irqstatus = omap2_prm_read_mod_reg(OCP_MOD,
OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
return irqstatus & vp->tranxdone_status;
}
static void omap3_prm_vp_clear_txdone(u8 vp_id)
{
struct omap3_vp *vp = &omap3_vp[vp_id];
omap2_prm_write_mod_reg(vp->tranxdone_status,
OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
}
u32 omap3_prm_vcvp_read(u8 offset)
{
return omap2_prm_read_mod_reg(OMAP3430_GR_MOD, offset);
}
void omap3_prm_vcvp_write(u32 val, u8 offset)
{
omap2_prm_write_mod_reg(val, OMAP3430_GR_MOD, offset);
}
u32 omap3_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset)
{
return omap2_prm_rmw_mod_reg_bits(mask, bits, OMAP3430_GR_MOD, offset);
}
/**
* omap3xxx_prm_dpll3_reset - use DPLL3 reset to reboot the OMAP SoC
*
* Set the DPLL3 reset bit, which should reboot the SoC. This is the
* recommended way to restart the SoC, considering Errata i520. No
* return value.
*/
static void omap3xxx_prm_dpll3_reset(void)
{
omap2_prm_set_mod_reg_bits(OMAP_RST_DPLL3_MASK, OMAP3430_GR_MOD,
OMAP2_RM_RSTCTRL);
/* OCP barrier */
omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP2_RM_RSTCTRL);
}
/**
* omap3xxx_prm_read_pending_irqs - read pending PRM MPU IRQs into @events
* @events: ptr to a u32, preallocated by caller
*
* Read PRM_IRQSTATUS_MPU bits, AND'ed with the currently-enabled PRM
* MPU IRQs, and store the result into the u32 pointed to by @events.
* No return value.
*/
static void omap3xxx_prm_read_pending_irqs(unsigned long *events)
{
u32 mask, st;
/* XXX Can the mask read be avoided (e.g., can it come from RAM?) */
mask = omap2_prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
st = omap2_prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
events[0] = mask & st;
}
/**
* omap3xxx_prm_ocp_barrier - force buffered MPU writes to the PRM to complete
*
* Force any buffered writes to the PRM IP block to complete. Needed
* by the PRM IRQ handler, which reads and writes directly to the IP
* block, to avoid race conditions after acknowledging or clearing IRQ
* bits. No return value.
*/
static void omap3xxx_prm_ocp_barrier(void)
{
omap2_prm_read_mod_reg(OCP_MOD, OMAP3_PRM_REVISION_OFFSET);
}
/**
* omap3xxx_prm_save_and_clear_irqen - save/clear PRM_IRQENABLE_MPU reg
* @saved_mask: ptr to a u32 array to save IRQENABLE bits
*
* Save the PRM_IRQENABLE_MPU register to @saved_mask. @saved_mask
* must be allocated by the caller. Intended to be used in the PRM
* interrupt handler suspend callback. The OCP barrier is needed to
* ensure the write to disable PRM interrupts reaches the PRM before
* returning; otherwise, spurious interrupts might occur. No return
* value.
*/
static void omap3xxx_prm_save_and_clear_irqen(u32 *saved_mask)
{
saved_mask[0] = omap2_prm_read_mod_reg(OCP_MOD,
OMAP3_PRM_IRQENABLE_MPU_OFFSET);
omap2_prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
/* OCP barrier */
omap2_prm_read_mod_reg(OCP_MOD, OMAP3_PRM_REVISION_OFFSET);
}
/**
* omap3xxx_prm_restore_irqen - set PRM_IRQENABLE_MPU register from args
* @saved_mask: ptr to a u32 array of IRQENABLE bits saved previously
*
* Restore the PRM_IRQENABLE_MPU register from @saved_mask. Intended
* to be used in the PRM interrupt handler resume callback to restore
* values saved by omap3xxx_prm_save_and_clear_irqen(). No OCP
* barrier should be needed here; any pending PRM interrupts will fire
* once the writes reach the PRM. No return value.
*/
static void omap3xxx_prm_restore_irqen(u32 *saved_mask)
{
omap2_prm_write_mod_reg(saved_mask[0], OCP_MOD,
OMAP3_PRM_IRQENABLE_MPU_OFFSET);
}
/**
* omap3xxx_prm_clear_mod_irqs - clear wake-up events from PRCM interrupt
* @module: PRM module to clear wakeups from
* @regs: register set to clear, 1 or 3
* @wkst_mask: wkst bits to clear
*
* The purpose of this function is to clear any wake-up events latched
* in the PRCM PM_WKST_x registers. It is possible that a wake-up event
* may occur whilst attempting to clear a PM_WKST_x register and thus
* set another bit in this register. A while loop is used to ensure
* that any peripheral wake-up events occurring while attempting to
* clear the PM_WKST_x are detected and cleared.
*/
static int omap3xxx_prm_clear_mod_irqs(s16 module, u8 regs, u32 wkst_mask)
{
u32 wkst, fclk, iclk, clken;
u16 wkst_off = (regs == 3) ? OMAP3430ES2_PM_WKST3 : PM_WKST1;
u16 fclk_off = (regs == 3) ? OMAP3430ES2_CM_FCLKEN3 : CM_FCLKEN1;
u16 iclk_off = (regs == 3) ? CM_ICLKEN3 : CM_ICLKEN1;
u16 grpsel_off = (regs == 3) ?
OMAP3430ES2_PM_MPUGRPSEL3 : OMAP3430_PM_MPUGRPSEL;
int c = 0;
wkst = omap2_prm_read_mod_reg(module, wkst_off);
wkst &= omap2_prm_read_mod_reg(module, grpsel_off);
wkst &= wkst_mask;
if (wkst) {
iclk = omap2_cm_read_mod_reg(module, iclk_off);
fclk = omap2_cm_read_mod_reg(module, fclk_off);
while (wkst) {
clken = wkst;
omap2_cm_set_mod_reg_bits(clken, module, iclk_off);
/*
* For USBHOST, we don't know whether HOST1 or
* HOST2 woke us up, so enable both f-clocks
*/
if (module == OMAP3430ES2_USBHOST_MOD)
clken |= 1 << OMAP3430ES2_EN_USBHOST2_SHIFT;
omap2_cm_set_mod_reg_bits(clken, module, fclk_off);
omap2_prm_write_mod_reg(wkst, module, wkst_off);
wkst = omap2_prm_read_mod_reg(module, wkst_off);
wkst &= wkst_mask;
c++;
}
omap2_cm_write_mod_reg(iclk, module, iclk_off);
omap2_cm_write_mod_reg(fclk, module, fclk_off);
}
return c;
}
/**
* omap3_prm_reset_modem - toggle reset signal for modem
*
* Toggles the reset signal to modem IP block. Required to allow
* OMAP3430 without stacked modem to idle properly.
*/
void __init omap3_prm_reset_modem(void)
{
omap2_prm_write_mod_reg(
OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON_MASK |
OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST_MASK,
CORE_MOD, OMAP2_RM_RSTCTRL);
omap2_prm_write_mod_reg(0, CORE_MOD, OMAP2_RM_RSTCTRL);
}
/**
* omap3_prm_init_pm - initialize PM related registers for PRM
* @has_uart4: SoC has UART4
* @has_iva: SoC has IVA
*
* Initializes PRM registers for PM use. Called from PM init.
*/
void __init omap3_prm_init_pm(bool has_uart4, bool has_iva)
{
u32 en_uart4_mask;
u32 grpsel_uart4_mask;
/*
* Enable control of expternal oscillator through
* sys_clkreq. In the long run clock framework should
* take care of this.
*/
omap2_prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK,
1 << OMAP_AUTOEXTCLKMODE_SHIFT,
OMAP3430_GR_MOD,
OMAP3_PRM_CLKSRC_CTRL_OFFSET);
/* setup wakup source */
omap2_prm_write_mod_reg(OMAP3430_EN_IO_MASK | OMAP3430_EN_GPIO1_MASK |
OMAP3430_EN_GPT1_MASK | OMAP3430_EN_GPT12_MASK,
WKUP_MOD, PM_WKEN);
/* No need to write EN_IO, that is always enabled */
omap2_prm_write_mod_reg(OMAP3430_GRPSEL_GPIO1_MASK |
OMAP3430_GRPSEL_GPT1_MASK |
OMAP3430_GRPSEL_GPT12_MASK,
WKUP_MOD, OMAP3430_PM_MPUGRPSEL);
/* Enable PM_WKEN to support DSS LPR */
omap2_prm_write_mod_reg(OMAP3430_PM_WKEN_DSS_EN_DSS_MASK,
OMAP3430_DSS_MOD, PM_WKEN);
if (has_uart4) {
en_uart4_mask = OMAP3630_EN_UART4_MASK;
grpsel_uart4_mask = OMAP3630_GRPSEL_UART4_MASK;
} else {
en_uart4_mask = 0;
grpsel_uart4_mask = 0;
}
/* Enable wakeups in PER */
omap2_prm_write_mod_reg(en_uart4_mask |
OMAP3430_EN_GPIO2_MASK |
OMAP3430_EN_GPIO3_MASK |
OMAP3430_EN_GPIO4_MASK |
OMAP3430_EN_GPIO5_MASK |
OMAP3430_EN_GPIO6_MASK |
OMAP3430_EN_UART3_MASK |
OMAP3430_EN_MCBSP2_MASK |
OMAP3430_EN_MCBSP3_MASK |
OMAP3430_EN_MCBSP4_MASK,
OMAP3430_PER_MOD, PM_WKEN);
/* and allow them to wake up MPU */
omap2_prm_write_mod_reg(grpsel_uart4_mask |
OMAP3430_GRPSEL_GPIO2_MASK |
OMAP3430_GRPSEL_GPIO3_MASK |
OMAP3430_GRPSEL_GPIO4_MASK |
OMAP3430_GRPSEL_GPIO5_MASK |
OMAP3430_GRPSEL_GPIO6_MASK |
OMAP3430_GRPSEL_UART3_MASK |
OMAP3430_GRPSEL_MCBSP2_MASK |
OMAP3430_GRPSEL_MCBSP3_MASK |
OMAP3430_GRPSEL_MCBSP4_MASK,
OMAP3430_PER_MOD, OMAP3430_PM_MPUGRPSEL);
/* Don't attach IVA interrupts */
if (has_iva) {
omap2_prm_write_mod_reg(0, WKUP_MOD, OMAP3430_PM_IVAGRPSEL);
omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430_PM_IVAGRPSEL1);
omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430ES2_PM_IVAGRPSEL3);
omap2_prm_write_mod_reg(0, OMAP3430_PER_MOD,
OMAP3430_PM_IVAGRPSEL);
}
/* Clear any pending 'reset' flags */
omap2_prm_write_mod_reg(0xffffffff, MPU_MOD, OMAP2_RM_RSTST);
omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP2_RM_RSTST);
omap2_prm_write_mod_reg(0xffffffff, OMAP3430_PER_MOD, OMAP2_RM_RSTST);
omap2_prm_write_mod_reg(0xffffffff, OMAP3430_EMU_MOD, OMAP2_RM_RSTST);
omap2_prm_write_mod_reg(0xffffffff, OMAP3430_NEON_MOD, OMAP2_RM_RSTST);
omap2_prm_write_mod_reg(0xffffffff, OMAP3430_DSS_MOD, OMAP2_RM_RSTST);
omap2_prm_write_mod_reg(0xffffffff, OMAP3430ES2_USBHOST_MOD,
OMAP2_RM_RSTST);
/* Clear any pending PRCM interrupts */
omap2_prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
/* We need to idle iva2_pwrdm even on am3703 with no iva2. */
omap3xxx_prm_iva_idle();
omap3_prm_reset_modem();
}
/**
* omap3430_pre_es3_1_reconfigure_io_chain - restart wake-up daisy chain
*
* The ST_IO_CHAIN bit does not exist in 3430 before es3.1. The only
* thing we can do is toggle EN_IO bit for earlier omaps.
*/
static void omap3430_pre_es3_1_reconfigure_io_chain(void)
{
omap2_prm_clear_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD,
PM_WKEN);
omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD,
PM_WKEN);
omap2_prm_read_mod_reg(WKUP_MOD, PM_WKEN);
}
/**
* omap3_prm_reconfigure_io_chain - clear latches and reconfigure I/O chain
*
* Clear any previously-latched I/O wakeup events and ensure that the
* I/O wakeup gates are aligned with the current mux settings. Works
* by asserting WUCLKIN, waiting for WUCLKOUT to be asserted, and then
* deasserting WUCLKIN and clearing the ST_IO_CHAIN WKST bit. No
* return value. These registers are only available in 3430 es3.1 and later.
*/
static void omap3_prm_reconfigure_io_chain(void)
{
int i = 0;
omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK, WKUP_MOD,
PM_WKEN);
omap_test_timeout(omap2_prm_read_mod_reg(WKUP_MOD, PM_WKST) &
OMAP3430_ST_IO_CHAIN_MASK,
MAX_IOPAD_LATCH_TIME, i);
if (i == MAX_IOPAD_LATCH_TIME)
pr_warn("PRM: I/O chain clock line assertion timed out\n");
omap2_prm_clear_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK, WKUP_MOD,
PM_WKEN);
omap2_prm_set_mod_reg_bits(OMAP3430_ST_IO_CHAIN_MASK, WKUP_MOD,
PM_WKST);
omap2_prm_read_mod_reg(WKUP_MOD, PM_WKST);
}
/**
* omap3xxx_prm_enable_io_wakeup - enable wakeup events from I/O wakeup latches
*
* Activates the I/O wakeup event latches and allows events logged by
* those latches to signal a wakeup event to the PRCM. For I/O
* wakeups to occur, WAKEUPENABLE bits must be set in the pad mux
* registers, and omap3xxx_prm_reconfigure_io_chain() must be called.
* No return value.
*/
static void __init omap3xxx_prm_enable_io_wakeup(void)
{
if (prm_features & PRM_HAS_IO_WAKEUP)
omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD,
PM_WKEN);
}
/**
* omap3xxx_prm_read_reset_sources - return the last SoC reset source
*
* Return a u32 representing the last reset sources of the SoC. The
* returned reset source bits are standardized across OMAP SoCs.
*/
static u32 omap3xxx_prm_read_reset_sources(void)
{
struct prm_reset_src_map *p;
u32 r = 0;
u32 v;
v = omap2_prm_read_mod_reg(WKUP_MOD, OMAP2_RM_RSTST);
p = omap3xxx_prm_reset_src_map;
while (p->reg_shift >= 0 && p->std_shift >= 0) {
if (v & (1 << p->reg_shift))
r |= 1 << p->std_shift;
p++;
}
return r;
}
/**
* omap3xxx_prm_iva_idle - ensure IVA is in idle so it can be put into retention
*
* In cases where IVA2 is activated by bootcode, it may prevent
* full-chip retention or off-mode because it is not idle. This
* function forces the IVA2 into idle state so it can go
* into retention/off and thus allow full-chip retention/off.
*/
void omap3xxx_prm_iva_idle(void)
{
/* ensure IVA2 clock is disabled */
omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
/* if no clock activity, nothing else to do */
if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
OMAP3430_CLKACTIVITY_IVA2_MASK))
return;
/* Reset IVA2 */
omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
OMAP3430_RST2_IVA2_MASK |
OMAP3430_RST3_IVA2_MASK,
OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
/* Enable IVA2 clock */
omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK,
OMAP3430_IVA2_MOD, CM_FCLKEN);
/* Un-reset IVA2 */
omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
/* Disable IVA2 clock */
omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
/* Reset IVA2 */
omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
OMAP3430_RST2_IVA2_MASK |
OMAP3430_RST3_IVA2_MASK,
OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
}
/**
* omap3xxx_prm_clear_global_cold_reset - checks the global cold reset status
* and clears it if asserted
*
* Checks if cold-reset has occurred and clears the status bit if yes. Returns
* 1 if cold-reset has occurred, 0 otherwise.
*/
int omap3xxx_prm_clear_global_cold_reset(void)
{
if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) &
OMAP3430_GLOBAL_COLD_RST_MASK) {
omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK,
OMAP3430_GR_MOD,
OMAP3_PRM_RSTST_OFFSET);
return 1;
}
return 0;
}
void omap3_prm_save_scratchpad_contents(u32 *ptr)
{
*ptr++ = omap2_prm_read_mod_reg(OMAP3430_GR_MOD,
OMAP3_PRM_CLKSRC_CTRL_OFFSET);
*ptr++ = omap2_prm_read_mod_reg(OMAP3430_GR_MOD,
OMAP3_PRM_CLKSEL_OFFSET);
}
/* Powerdomain low-level functions */
static int omap3_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
{
omap2_prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK,
(pwrst << OMAP_POWERSTATE_SHIFT),
pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
return 0;
}
static int omap3_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
{
return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs,
OMAP2_PM_PWSTCTRL,
OMAP_POWERSTATE_MASK);
}
static int omap3_pwrdm_read_pwrst(struct powerdomain *pwrdm)
{
return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs,
OMAP2_PM_PWSTST,
OMAP_POWERSTATEST_MASK);
}
/* Applicable only for OMAP3. Not supported on OMAP2 */
static int omap3_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
{
return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs,
OMAP3430_PM_PREPWSTST,
OMAP3430_LASTPOWERSTATEENTERED_MASK);
}
static int omap3_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
{
return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs,
OMAP2_PM_PWSTST,
OMAP3430_LOGICSTATEST_MASK);
}
static int omap3_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
{
return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs,
OMAP2_PM_PWSTCTRL,
OMAP3430_LOGICSTATEST_MASK);
}
static int omap3_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
{
return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs,
OMAP3430_PM_PREPWSTST,
OMAP3430_LASTLOGICSTATEENTERED_MASK);
}
static int omap3_get_mem_bank_lastmemst_mask(u8 bank)
{
switch (bank) {
case 0:
return OMAP3430_LASTMEM1STATEENTERED_MASK;
case 1:
return OMAP3430_LASTMEM2STATEENTERED_MASK;
case 2:
return OMAP3430_LASTSHAREDL2CACHEFLATSTATEENTERED_MASK;
case 3:
return OMAP3430_LASTL2FLATMEMSTATEENTERED_MASK;
default:
WARN_ON(1); /* should never happen */
return -EEXIST;
}
return 0;
}
static int omap3_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
{
u32 m;
m = omap3_get_mem_bank_lastmemst_mask(bank);
return omap2_prm_read_mod_bits_shift(pwrdm->prcm_offs,
OMAP3430_PM_PREPWSTST, m);
}
static int omap3_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
{
omap2_prm_write_mod_reg(0, pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST);
return 0;
}
static int omap3_pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
{
return omap2_prm_rmw_mod_reg_bits(0,
1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT,
pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
}
static int omap3_pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
{
return omap2_prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT,
0, pwrdm->prcm_offs,
OMAP2_PM_PWSTCTRL);
}
struct pwrdm_ops omap3_pwrdm_operations = {
.pwrdm_set_next_pwrst = omap3_pwrdm_set_next_pwrst,
.pwrdm_read_next_pwrst = omap3_pwrdm_read_next_pwrst,
.pwrdm_read_pwrst = omap3_pwrdm_read_pwrst,
.pwrdm_read_prev_pwrst = omap3_pwrdm_read_prev_pwrst,
.pwrdm_set_logic_retst = omap2_pwrdm_set_logic_retst,
.pwrdm_read_logic_pwrst = omap3_pwrdm_read_logic_pwrst,
.pwrdm_read_logic_retst = omap3_pwrdm_read_logic_retst,
.pwrdm_read_prev_logic_pwrst = omap3_pwrdm_read_prev_logic_pwrst,
.pwrdm_set_mem_onst = omap2_pwrdm_set_mem_onst,
.pwrdm_set_mem_retst = omap2_pwrdm_set_mem_retst,
.pwrdm_read_mem_pwrst = omap2_pwrdm_read_mem_pwrst,
.pwrdm_read_mem_retst = omap2_pwrdm_read_mem_retst,
.pwrdm_read_prev_mem_pwrst = omap3_pwrdm_read_prev_mem_pwrst,
.pwrdm_clear_all_prev_pwrst = omap3_pwrdm_clear_all_prev_pwrst,
.pwrdm_enable_hdwr_sar = omap3_pwrdm_enable_hdwr_sar,
.pwrdm_disable_hdwr_sar = omap3_pwrdm_disable_hdwr_sar,
.pwrdm_wait_transition = omap2_pwrdm_wait_transition,
};
/*
*
*/
static int omap3xxx_prm_late_init(void);
static struct prm_ll_data omap3xxx_prm_ll_data = {
.read_reset_sources = &omap3xxx_prm_read_reset_sources,
.late_init = &omap3xxx_prm_late_init,
.assert_hardreset = &omap2_prm_assert_hardreset,
.deassert_hardreset = &omap2_prm_deassert_hardreset,
.is_hardreset_asserted = &omap2_prm_is_hardreset_asserted,
.reset_system = &omap3xxx_prm_dpll3_reset,
.clear_mod_irqs = &omap3xxx_prm_clear_mod_irqs,
.vp_check_txdone = &omap3_prm_vp_check_txdone,
.vp_clear_txdone = &omap3_prm_vp_clear_txdone,
};
int __init omap3xxx_prm_init(const struct omap_prcm_init_data *data)
{
omap2_clk_legacy_provider_init(TI_CLKM_PRM,
prm_base.va + OMAP3430_IVA2_MOD);
if (omap3_has_io_wakeup())
prm_features |= PRM_HAS_IO_WAKEUP;
return prm_register(&omap3xxx_prm_ll_data);
}
static const struct of_device_id omap3_prm_dt_match_table[] = {
{ .compatible = "ti,omap3-prm" },
{ }
};
static int omap3xxx_prm_late_init(void)
{
struct device_node *np;
int irq_num;
if (!(prm_features & PRM_HAS_IO_WAKEUP))
return 0;
if (omap3_has_io_chain_ctrl())
omap3_prcm_irq_setup.reconfigure_io_chain =
omap3_prm_reconfigure_io_chain;
else
omap3_prcm_irq_setup.reconfigure_io_chain =
omap3430_pre_es3_1_reconfigure_io_chain;
np = of_find_matching_node(NULL, omap3_prm_dt_match_table);
if (!np) {
pr_err("PRM: no device tree node for interrupt?\n");
return -ENODEV;
}
irq_num = of_irq_get(np, 0);
if (irq_num == -EPROBE_DEFER)
return irq_num;
omap3_prcm_irq_setup.irq = irq_num;
omap3xxx_prm_enable_io_wakeup();
return omap_prcm_register_chain_handler(&omap3_prcm_irq_setup);
}
static void __exit omap3xxx_prm_exit(void)
{
prm_unregister(&omap3xxx_prm_ll_data);
}
__exitcall(omap3xxx_prm_exit);
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