diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/prm2xxx_3xxx.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-omap2/prm2xxx_3xxx.c | 310 |
1 files changed, 0 insertions, 310 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/prm2xxx_3xxx.c b/ANDROID_3.4.5/arch/arm/mach-omap2/prm2xxx_3xxx.c deleted file mode 100644 index 9ce76540..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-omap2/prm2xxx_3xxx.c +++ /dev/null @@ -1,310 +0,0 @@ -/* - * OMAP2/3 PRM module functions - * - * Copyright (C) 2010-2011 Texas Instruments, Inc. - * Copyright (C) 2010 Nokia Corporation - * Benoît Cousson - * 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/errno.h> -#include <linux/err.h> -#include <linux/io.h> - -#include "common.h" -#include <plat/cpu.h> -#include <plat/prcm.h> -#include <plat/irqs.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 = INT_34XX_PRCM_MPU_IRQ, - .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 - * submodules contained in the hwmod module - * @prm_mod: PRM submodule base (e.g. CORE_MOD) - * @shift: register bit shift corresponding to the reset line to check - * - * Returns 1 if the (sub)module hardreset line is currently asserted, - * 0 if the (sub)module hardreset line is not currently asserted, or - * -EINVAL if called while running on a non-OMAP2/3 chip. - */ -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)); -} - -/** - * omap2_prm_assert_hardreset - assert the HW reset line of a submodule - * @prm_mod: PRM submodule base (e.g. CORE_MOD) - * @shift: register bit shift corresponding to the reset line to assert - * - * Some IPs like dsp or iva contain processors that require an HW - * reset line to be asserted / deasserted in order to fully enable the - * IP. These modules may have multiple hard-reset lines that reset - * different 'submodules' inside the IP block. This function will - * place the submodule into reset. Returns 0 upon success or -EINVAL - * upon an argument error. - */ -int omap2_prm_assert_hardreset(s16 prm_mod, u8 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); - - return 0; -} - -/** - * omap2_prm_deassert_hardreset - deassert a submodule hardreset line and wait - * @prm_mod: PRM submodule base (e.g. CORE_MOD) - * @rst_shift: register bit shift corresponding to the reset line to deassert - * @st_shift: register bit shift for the status of the deasserted submodule - * - * Some IPs like dsp or iva contain processors that require an HW - * reset line to be asserted / deasserted in order to fully enable the - * IP. These modules may have multiple hard-reset lines that reset - * different 'submodules' inside the IP block. This function will - * take the submodule out of reset and wait until the PRCM indicates - * that the reset has completed before returning. Returns 0 upon success or - * -EINVAL upon an argument error, -EEXIST if the submodule was already out - * of reset, or -EBUSY if the submodule did not exit reset promptly. - */ -int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift) -{ - u32 rst, st; - int c; - - if (!(cpu_is_omap24xx() || cpu_is_omap34xx())) - return -EINVAL; - - rst = 1 << rst_shift; - st = 1 << st_shift; - - /* Check the current status to avoid de-asserting the line twice */ - if (omap2_prm_read_mod_bits_shift(prm_mod, OMAP2_RM_RSTCTRL, rst) == 0) - return -EEXIST; - - /* Clear the reset status by writing 1 to the status bit */ - omap2_prm_rmw_mod_reg_bits(0xffffffff, st, prm_mod, OMAP2_RM_RSTST); - /* de-assert the reset control line */ - omap2_prm_rmw_mod_reg_bits(rst, 0, prm_mod, OMAP2_RM_RSTCTRL); - /* wait the status to be set */ - omap_test_timeout(omap2_prm_read_mod_bits_shift(prm_mod, OMAP2_RM_RSTST, - st), - MAX_MODULE_HARDRESET_WAIT, c); - - 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); -} - -static int __init omap3xxx_prcm_init(void) -{ - if (cpu_is_omap34xx()) - return omap_prcm_register_chain_handler(&omap3_prcm_irq_setup); - return 0; -} -subsys_initcall(omap3xxx_prcm_init); |