Gagan Mac | 4cc403f | 2013-05-01 12:13:31 -0600 | [diff] [blame] | 1 | /* Copyright (c) 2011-2013, The Linux Foundation. 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 | */ |
Stephen Boyd | 8704c7f | 2012-02-05 01:07:45 -0800 | [diff] [blame] | 12 | |
| 13 | #define pr_fmt(fmt) "AXI: %s(): " fmt, __func__ |
| 14 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/mutex.h> |
| 20 | #include <linux/radix-tree.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <mach/msm_bus_board.h> |
| 23 | #include <mach/msm_bus.h> |
| 24 | #include "msm_bus_core.h" |
| 25 | |
| 26 | static DEFINE_MUTEX(msm_bus_config_lock); |
| 27 | |
| 28 | /** |
| 29 | * msm_bus_axi_porthalt() - Halt the given axi master port |
| 30 | * @master_port: AXI Master port to be halted |
| 31 | */ |
| 32 | int msm_bus_axi_porthalt(int master_port) |
| 33 | { |
| 34 | int ret = 0; |
| 35 | int priv_id; |
| 36 | struct msm_bus_fabric_device *fabdev; |
| 37 | |
| 38 | priv_id = msm_bus_board_get_iid(master_port); |
| 39 | MSM_BUS_DBG("master_port: %d iid: %d fabid%d\n", |
| 40 | master_port, priv_id, GET_FABID(priv_id)); |
| 41 | fabdev = msm_bus_get_fabric_device(GET_FABID(priv_id)); |
Gagan Mac | 4cc403f | 2013-05-01 12:13:31 -0600 | [diff] [blame] | 42 | if (IS_ERR_OR_NULL(fabdev)) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 43 | MSM_BUS_ERR("Fabric device not found for mport: %d\n", |
| 44 | master_port); |
| 45 | return -ENODEV; |
| 46 | } |
| 47 | mutex_lock(&msm_bus_config_lock); |
| 48 | ret = fabdev->algo->port_halt(fabdev, priv_id); |
| 49 | mutex_unlock(&msm_bus_config_lock); |
| 50 | return ret; |
| 51 | } |
| 52 | EXPORT_SYMBOL(msm_bus_axi_porthalt); |
| 53 | |
| 54 | /** |
| 55 | * msm_bus_axi_portunhalt() - Unhalt the given axi master port |
| 56 | * @master_port: AXI Master port to be unhalted |
| 57 | */ |
| 58 | int msm_bus_axi_portunhalt(int master_port) |
| 59 | { |
| 60 | int ret = 0; |
| 61 | int priv_id; |
| 62 | struct msm_bus_fabric_device *fabdev; |
| 63 | |
| 64 | priv_id = msm_bus_board_get_iid(master_port); |
| 65 | MSM_BUS_DBG("master_port: %d iid: %d fabid: %d\n", |
| 66 | master_port, priv_id, GET_FABID(priv_id)); |
| 67 | fabdev = msm_bus_get_fabric_device(GET_FABID(priv_id)); |
Gagan Mac | 4cc403f | 2013-05-01 12:13:31 -0600 | [diff] [blame] | 68 | if (IS_ERR_OR_NULL(fabdev)) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 69 | MSM_BUS_ERR("Fabric device not found for mport: %d\n", |
| 70 | master_port); |
| 71 | return -ENODEV; |
| 72 | } |
| 73 | mutex_lock(&msm_bus_config_lock); |
| 74 | ret = fabdev->algo->port_unhalt(fabdev, priv_id); |
| 75 | mutex_unlock(&msm_bus_config_lock); |
| 76 | return ret; |
| 77 | } |
| 78 | EXPORT_SYMBOL(msm_bus_axi_portunhalt); |