Praveen Chidambaram | c0750ca | 2012-01-08 10:03:28 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved. |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/io.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <mach/msm_iomap.h> |
Praveen Chidambaram | 76679d4 | 2011-12-16 14:19:02 -0700 | [diff] [blame] | 21 | #include <mach/socinfo.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 22 | #include "spm.h" |
| 23 | #include "spm_driver.h" |
| 24 | |
| 25 | struct msm_spm_power_modes { |
| 26 | uint32_t mode; |
| 27 | bool notify_rpm; |
| 28 | uint32_t start_addr; |
| 29 | |
| 30 | }; |
| 31 | |
| 32 | struct msm_spm_device { |
| 33 | struct msm_spm_driver_data reg_data; |
| 34 | struct msm_spm_power_modes *modes; |
| 35 | uint32_t num_modes; |
| 36 | }; |
| 37 | |
| 38 | static DEFINE_PER_CPU_SHARED_ALIGNED(struct msm_spm_device, msm_cpu_spm_device); |
| 39 | static atomic_t msm_spm_set_vdd_x_cpu_allowed = ATOMIC_INIT(1); |
| 40 | |
| 41 | void msm_spm_allow_x_cpu_set_vdd(bool allowed) |
| 42 | { |
| 43 | atomic_set(&msm_spm_set_vdd_x_cpu_allowed, allowed ? 1 : 0); |
| 44 | } |
| 45 | |
| 46 | int msm_spm_set_vdd(unsigned int cpu, unsigned int vlevel) |
| 47 | { |
| 48 | unsigned long flags; |
| 49 | struct msm_spm_device *dev; |
| 50 | int ret = -EIO; |
| 51 | |
| 52 | local_irq_save(flags); |
| 53 | if (!atomic_read(&msm_spm_set_vdd_x_cpu_allowed) && |
| 54 | unlikely(smp_processor_id() != cpu)) { |
| 55 | goto set_vdd_x_cpu_bail; |
| 56 | } |
| 57 | |
| 58 | dev = &per_cpu(msm_cpu_spm_device, cpu); |
| 59 | ret = msm_spm_drv_set_vdd(&dev->reg_data, vlevel); |
| 60 | |
| 61 | set_vdd_x_cpu_bail: |
| 62 | local_irq_restore(flags); |
| 63 | return ret; |
| 64 | } |
| 65 | |
| 66 | static int msm_spm_dev_set_low_power_mode(struct msm_spm_device *dev, |
| 67 | unsigned int mode, bool notify_rpm) |
| 68 | { |
| 69 | uint32_t i; |
| 70 | uint32_t start_addr = 0; |
| 71 | int ret = -EINVAL; |
| 72 | |
| 73 | if (mode == MSM_SPM_MODE_DISABLED) { |
| 74 | ret = msm_spm_drv_set_spm_enable(&dev->reg_data, false); |
| 75 | } else if (!msm_spm_drv_set_spm_enable(&dev->reg_data, true)) { |
| 76 | for (i = 0; i < dev->num_modes; i++) { |
| 77 | if ((dev->modes[i].mode == mode) && |
| 78 | (dev->modes[i].notify_rpm == notify_rpm)) { |
| 79 | start_addr = dev->modes[i].start_addr; |
| 80 | break; |
| 81 | } |
| 82 | } |
| 83 | ret = msm_spm_drv_set_low_power_mode(&dev->reg_data, |
| 84 | start_addr); |
| 85 | } |
| 86 | return ret; |
| 87 | } |
| 88 | |
| 89 | static int __init msm_spm_dev_init(struct msm_spm_device *dev, |
| 90 | struct msm_spm_platform_data *data) |
| 91 | { |
| 92 | int i, ret = -ENOMEM; |
| 93 | uint32_t offset = 0; |
| 94 | |
| 95 | dev->num_modes = data->num_modes; |
| 96 | dev->modes = kmalloc( |
| 97 | sizeof(struct msm_spm_power_modes) * dev->num_modes, |
| 98 | GFP_KERNEL); |
| 99 | |
| 100 | if (!dev->modes) |
| 101 | goto spm_failed_malloc; |
| 102 | |
| 103 | ret = msm_spm_drv_init(&dev->reg_data, data); |
| 104 | |
| 105 | if (ret) |
| 106 | goto spm_failed_init; |
| 107 | |
| 108 | for (i = 0; i < dev->num_modes; i++) { |
| 109 | |
| 110 | ret = msm_spm_drv_write_seq_data(&dev->reg_data, |
| 111 | data->modes[i].cmd, offset); |
| 112 | if (ret < 0) |
| 113 | goto spm_failed_init; |
| 114 | |
| 115 | dev->modes[i].mode = data->modes[i].mode; |
| 116 | dev->modes[i].notify_rpm = data->modes[i].notify_rpm; |
| 117 | dev->modes[i].start_addr = offset; |
| 118 | offset += ret; |
| 119 | } |
| 120 | msm_spm_drv_flush_seq_entry(&dev->reg_data); |
| 121 | return 0; |
| 122 | |
| 123 | spm_failed_init: |
| 124 | kfree(dev->modes); |
| 125 | spm_failed_malloc: |
| 126 | return ret; |
| 127 | } |
| 128 | |
| 129 | int msm_spm_set_low_power_mode(unsigned int mode, bool notify_rpm) |
| 130 | { |
| 131 | struct msm_spm_device *dev = &__get_cpu_var(msm_cpu_spm_device); |
| 132 | return msm_spm_dev_set_low_power_mode(dev, mode, notify_rpm); |
| 133 | } |
| 134 | |
| 135 | int __init msm_spm_init(struct msm_spm_platform_data *data, int nr_devs) |
| 136 | { |
| 137 | unsigned int cpu; |
| 138 | int ret = 0; |
| 139 | |
| 140 | BUG_ON((nr_devs < num_possible_cpus()) || !data); |
| 141 | |
| 142 | for_each_possible_cpu(cpu) { |
| 143 | struct msm_spm_device *dev = &per_cpu(msm_cpu_spm_device, cpu); |
| 144 | ret = msm_spm_dev_init(dev, &data[cpu]); |
| 145 | if (ret < 0) { |
| 146 | pr_warn("%s():failed CPU:%u ret:%d\n", __func__, |
| 147 | cpu, ret); |
| 148 | break; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | return ret; |
| 153 | } |
| 154 | |
Praveen Chidambaram | c0750ca | 2012-01-08 10:03:28 -0700 | [diff] [blame] | 155 | int msm_spm_turn_on_cpu_rail(unsigned int cpu) |
| 156 | { |
| 157 | uint32_t val = 0; |
| 158 | uint32_t timeout = 0; |
| 159 | void *reg = NULL; |
Stepan Moskovchenko | 2b0b06e | 2012-02-03 15:03:52 -0800 | [diff] [blame] | 160 | void *saw_bases[] = { |
| 161 | 0, |
| 162 | MSM_SAW1_BASE, |
| 163 | MSM_SAW2_BASE, |
| 164 | MSM_SAW3_BASE |
| 165 | }; |
Praveen Chidambaram | c0750ca | 2012-01-08 10:03:28 -0700 | [diff] [blame] | 166 | |
Stepan Moskovchenko | 2b0b06e | 2012-02-03 15:03:52 -0800 | [diff] [blame] | 167 | if (cpu == 0 || cpu >= num_possible_cpus()) |
Praveen Chidambaram | c0750ca | 2012-01-08 10:03:28 -0700 | [diff] [blame] | 168 | return -EINVAL; |
| 169 | |
Stepan Moskovchenko | 2b0b06e | 2012-02-03 15:03:52 -0800 | [diff] [blame] | 170 | reg = saw_bases[cpu]; |
Praveen Chidambaram | c0750ca | 2012-01-08 10:03:28 -0700 | [diff] [blame] | 171 | |
Mahesh Sivasubramanian | cd91c8f | 2012-03-07 16:59:05 -0700 | [diff] [blame^] | 172 | if (cpu_is_msm8960() || cpu_is_msm8930() || cpu_is_apq8064()) { |
Stepan Moskovchenko | 2b0b06e | 2012-02-03 15:03:52 -0800 | [diff] [blame] | 173 | val = 0xA4; |
| 174 | reg += 0x14; |
| 175 | timeout = 512; |
Praveen Chidambaram | c0750ca | 2012-01-08 10:03:28 -0700 | [diff] [blame] | 176 | } else { |
| 177 | return -ENOSYS; |
| 178 | } |
| 179 | |
| 180 | writel_relaxed(val, reg); |
| 181 | mb(); |
| 182 | udelay(timeout); |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | EXPORT_SYMBOL(msm_spm_turn_on_cpu_rail); |
| 187 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 188 | #if defined(CONFIG_MSM_L2_SPM) |
| 189 | static struct msm_spm_device msm_spm_l2_device; |
| 190 | |
| 191 | int msm_spm_l2_set_low_power_mode(unsigned int mode, bool notify_rpm) |
| 192 | { |
| 193 | return msm_spm_dev_set_low_power_mode( |
| 194 | &msm_spm_l2_device, mode, notify_rpm); |
| 195 | } |
| 196 | |
| 197 | int __init msm_spm_l2_init(struct msm_spm_platform_data *data) |
| 198 | { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 199 | return msm_spm_dev_init(&msm_spm_l2_device, data); |
| 200 | } |
| 201 | #endif |