| Benoît Cousson | 0be1621 | 2010-09-21 10:34:10 -0600 | [diff] [blame] | 1 | /* |
| 2 | * OMAP4 PRM module functions |
| 3 | * |
| Benoit Cousson | eaac329 | 2011-07-10 05:56:31 -0600 | [diff] [blame^] | 4 | * Copyright (C) 2011 Texas Instruments, Inc. |
| Benoît Cousson | 0be1621 | 2010-09-21 10:34:10 -0600 | [diff] [blame] | 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> |
| Paul Walmsley | 2ace831 | 2010-12-21 21:05:14 -0700 | [diff] [blame] | 18 | #include <linux/io.h> |
| Benoît Cousson | 0be1621 | 2010-09-21 10:34:10 -0600 | [diff] [blame] | 19 | |
| 20 | #include <plat/common.h> |
| 21 | #include <plat/cpu.h> |
| 22 | #include <plat/prcm.h> |
| 23 | |
| Paul Walmsley | d198b51 | 2010-12-21 15:30:54 -0700 | [diff] [blame] | 24 | #include "prm44xx.h" |
| Benoît Cousson | 0be1621 | 2010-09-21 10:34:10 -0600 | [diff] [blame] | 25 | #include "prm-regbits-44xx.h" |
| 26 | |
| Paul Walmsley | 2ace831 | 2010-12-21 21:05:14 -0700 | [diff] [blame] | 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 | |
| Paul Walmsley | dac9a77 | 2010-12-21 21:05:14 -0700 | [diff] [blame] | 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 | } |