#include <linux/errno.h>
#include <linux/err.h>
#include <linux/io.h>
-#include <linux/irq.h>
-#include <plat/prcm.h>
-
-#include "soc.h"
#include "common.h"
-#include "vp.h"
#include "prm2xxx_3xxx.h"
-#include "cm2xxx_3xxx.h"
#include "prm-regbits-24xx.h"
-#include "prm-regbits-34xx.h"
-
-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,
-};
-
-u32 omap2_prm_read_mod_reg(s16 module, u16 idx)
-{
- return __raw_readl(prm_base + module + idx);
-}
-
-void omap2_prm_write_mod_reg(u32 val, s16 module, u16 idx)
-{
- __raw_writel(val, prm_base + module + idx);
-}
-
-/* Read-modify-write a register in a PRM module. Caller must lock */
-u32 omap2_prm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx)
-{
- u32 v;
-
- v = omap2_prm_read_mod_reg(module, idx);
- v &= ~mask;
- v |= bits;
- omap2_prm_write_mod_reg(v, module, idx);
-
- return v;
-}
-
-/* Read a PRM register, AND it, and shift the result down to bit 0 */
-u32 omap2_prm_read_mod_bits_shift(s16 domain, s16 idx, u32 mask)
-{
- u32 v;
-
- v = omap2_prm_read_mod_reg(domain, idx);
- v &= mask;
- v >>= __ffs(mask);
-
- return v;
-}
-
-u32 omap2_prm_set_mod_reg_bits(u32 bits, s16 module, s16 idx)
-{
- return omap2_prm_rmw_mod_reg_bits(bits, bits, module, idx);
-}
-
-u32 omap2_prm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
-{
- return omap2_prm_rmw_mod_reg_bits(bits, 0x0, module, idx);
-}
-
/**
* omap2_prm_is_hardreset_asserted - read the HW reset line state of
*/
int omap2_prm_is_hardreset_asserted(s16 prm_mod, u8 shift)
{
- if (!(cpu_is_omap24xx() || cpu_is_omap34xx()))
- return -EINVAL;
-
return omap2_prm_read_mod_bits_shift(prm_mod, OMAP2_RM_RSTCTRL,
(1 << shift));
}
{
u32 mask;
- if (!(cpu_is_omap24xx() || cpu_is_omap34xx()))
- return -EINVAL;
-
mask = 1 << shift;
omap2_prm_rmw_mod_reg_bits(mask, mask, prm_mod, OMAP2_RM_RSTCTRL);
u32 rst, st;
int c;
- if (!(cpu_is_omap24xx() || cpu_is_omap34xx()))
- return -EINVAL;
-
rst = 1 << rst_shift;
st = 1 << st_shift;
return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0;
}
-/* 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);
-
-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;
-}
-
-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_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.
- */
-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.
- */
-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.
- */
-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.
- */
-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_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.
- */
-void omap3xxx_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 (omap3_has_io_wakeup())
- omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD,
- PM_WKEN);
-}
-
-static int __init omap3xxx_prcm_init(void)
-{
- int ret = 0;
-
- if (cpu_is_omap34xx()) {
- omap3xxx_prm_enable_io_wakeup();
- ret = omap_prcm_register_chain_handler(&omap3_prcm_irq_setup);
- if (!ret)
- irq_set_status_flags(omap_prcm_event_to_irq("io"),
- IRQ_NOAUTOEN);
- }
-
- return ret;
-}
-subsys_initcall(omap3xxx_prcm_init);
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