projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0be1621a BC |
1 | /* |
| 2 | * OMAP4 PRM module functions | |
| 3 | * | |
| eaac329d | 4 | * Copyright (C) 2011 Texas Instruments, Inc. |
| 0be1621a BC |
5 | * Copyright (C) 2010 Nokia Corporation |
| 6 | * Benoît Cousson | |
| 7 | * Paul Walmsley | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU General Public License version 2 as | |
| 11 | * published by the Free Software Foundation. | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/delay.h> | |
| 16 | #include <linux/errno.h> | |
| 17 | #include <linux/err.h> | |
| 2ace831f | 18 | #include <linux/io.h> |
| 0be1621a BC |
19 | |
| 20 | #include <plat/common.h> | |
| 21 | #include <plat/cpu.h> | |
| 22 | #include <plat/prcm.h> | |
| 23 | ||
| d198b514 | 24 | #include "prm44xx.h" |
| 0be1621a BC |
25 | #include "prm-regbits-44xx.h" |
| 26 | ||
| 2ace831f PW |
27 | /* PRM low-level functions */ |
| 28 | ||
| 29 | /* Read a register in a CM/PRM instance in the PRM module */ | |
| 30 | u32 omap4_prm_read_inst_reg(s16 inst, u16 reg) | |
| 31 | { | |
| 32 | return __raw_readl(OMAP44XX_PRM_REGADDR(inst, reg)); | |
| 33 | } | |
| 34 | ||
| 35 | /* Write into a register in a CM/PRM instance in the PRM module */ | |
| 36 | void omap4_prm_write_inst_reg(u32 val, s16 inst, u16 reg) | |
| 37 | { | |
| 38 | __raw_writel(val, OMAP44XX_PRM_REGADDR(inst, reg)); | |
| 39 | } | |
| 40 | ||
| 41 | /* Read-modify-write a register in a PRM module. Caller must lock */ | |
| 42 | u32 omap4_prm_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg) | |
| 43 | { | |
| 44 | u32 v; | |
| 45 | ||
| 46 | v = omap4_prm_read_inst_reg(inst, reg); | |
| 47 | v &= ~mask; | |
| 48 | v |= bits; | |
| 49 | omap4_prm_write_inst_reg(v, inst, reg); | |
| 50 | ||
| 51 | return v; | |
| 52 | } | |
| 53 | ||
| 54 | /* Read a PRM register, AND it, and shift the result down to bit 0 */ | |
| 55 | /* XXX deprecated */ | |
| 56 | u32 omap4_prm_read_bits_shift(void __iomem *reg, u32 mask) | |
| 57 | { | |
| 58 | u32 v; | |
| 59 | ||
| 60 | v = __raw_readl(reg); | |
| 61 | v &= mask; | |
| 62 | v >>= __ffs(mask); | |
| 63 | ||
| 64 | return v; | |
| 65 | } | |
| 66 | ||
| 67 | /* Read-modify-write a register in a PRM module. Caller must lock */ | |
| 68 | /* XXX deprecated */ | |
| 69 | u32 omap4_prm_rmw_reg_bits(u32 mask, u32 bits, void __iomem *reg) | |
| 70 | { | |
| 71 | u32 v; | |
| 72 | ||
| 73 | v = __raw_readl(reg); | |
| 74 | v &= ~mask; | |
| 75 | v |= bits; | |
| 76 | __raw_writel(v, reg); | |
| 77 | ||
| 78 | return v; | |
| 79 | } | |
| 80 | ||
| 81 | u32 omap4_prm_set_inst_reg_bits(u32 bits, s16 inst, s16 reg) | |
| 82 | { | |
| 83 | return omap4_prm_rmw_inst_reg_bits(bits, bits, inst, reg); | |
| 84 | } | |
| 85 | ||
| 86 | u32 omap4_prm_clear_inst_reg_bits(u32 bits, s16 inst, s16 reg) | |
| 87 | { | |
| 88 | return omap4_prm_rmw_inst_reg_bits(bits, 0x0, inst, reg); | |
| 89 | } | |
| 90 | ||
| dac9a771 PW |
91 | void omap4_prm_global_warm_sw_reset(void) |
| 92 | { | |
| 93 | u32 v; | |
| 94 | ||
| 95 | v = omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST, | |
| 96 | OMAP4_RM_RSTCTRL); | |
| 97 | v |= OMAP4430_RST_GLOBAL_WARM_SW_MASK; | |
| 98 | omap4_prm_write_inst_reg(v, OMAP4430_PRM_DEVICE_INST, | |
| 99 | OMAP4_RM_RSTCTRL); | |
| 100 | ||
| 101 | /* OCP barrier */ | |
| 102 | v = omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST, | |
| 103 | OMAP4_RM_RSTCTRL); | |
| 104 | } |