| Stephen Boyd | e44ec39 | 2011-08-29 12:03:24 -0700 | [diff] [blame^] | 1 | /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
| 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 | #include <linux/module.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/string.h> |
| 16 | |
| 17 | #include <mach/scm.h> |
| 18 | #include <mach/socinfo.h> |
| 19 | #include "scm-pas.h" |
| 20 | |
| 21 | #define PAS_INIT_IMAGE_CMD 1 |
| 22 | #define PAS_AUTH_AND_RESET_CMD 5 |
| 23 | #define PAS_SHUTDOWN_CMD 6 |
| 24 | #define PAS_IS_SUPPORTED_CMD 7 |
| 25 | |
| 26 | int pas_init_image(enum pas_id id, const u8 *metadata, size_t size) |
| 27 | { |
| 28 | int ret; |
| 29 | struct pas_init_image_req { |
| 30 | u32 proc; |
| 31 | u32 image_addr; |
| 32 | } request; |
| 33 | u32 scm_ret = 0; |
| 34 | /* Make memory physically contiguous */ |
| 35 | void *mdata_buf = kmemdup(metadata, size, GFP_KERNEL); |
| 36 | |
| 37 | if (!mdata_buf) |
| 38 | return -ENOMEM; |
| 39 | |
| 40 | request.proc = id; |
| 41 | request.image_addr = virt_to_phys(mdata_buf); |
| 42 | |
| 43 | ret = scm_call(SCM_SVC_PIL, PAS_INIT_IMAGE_CMD, &request, |
| 44 | sizeof(request), &scm_ret, sizeof(scm_ret)); |
| 45 | kfree(mdata_buf); |
| 46 | |
| 47 | if (ret) |
| 48 | return ret; |
| 49 | return scm_ret; |
| 50 | } |
| 51 | EXPORT_SYMBOL(pas_init_image); |
| 52 | |
| 53 | int pas_auth_and_reset(enum pas_id id) |
| 54 | { |
| 55 | int ret; |
| 56 | u32 proc = id, scm_ret = 0; |
| 57 | |
| 58 | ret = scm_call(SCM_SVC_PIL, PAS_AUTH_AND_RESET_CMD, &proc, |
| 59 | sizeof(proc), &scm_ret, sizeof(scm_ret)); |
| 60 | if (ret) |
| 61 | return ret; |
| 62 | |
| 63 | return scm_ret; |
| 64 | } |
| 65 | EXPORT_SYMBOL(pas_auth_and_reset); |
| 66 | |
| 67 | int pas_shutdown(enum pas_id id) |
| 68 | { |
| 69 | int ret; |
| 70 | u32 proc = id, scm_ret = 0; |
| 71 | |
| 72 | ret = scm_call(SCM_SVC_PIL, PAS_SHUTDOWN_CMD, &proc, sizeof(proc), |
| 73 | &scm_ret, sizeof(scm_ret)); |
| 74 | if (ret) |
| 75 | return ret; |
| 76 | |
| 77 | return scm_ret; |
| 78 | } |
| 79 | EXPORT_SYMBOL(pas_shutdown); |
| 80 | |
| 81 | static bool secure_pil = true; |
| 82 | module_param(secure_pil, bool, S_IRUGO); |
| 83 | MODULE_PARM_DESC(secure_pil, "Use secure PIL"); |
| 84 | |
| 85 | int pas_supported(enum pas_id id) |
| 86 | { |
| 87 | int ret; |
| 88 | u32 periph = id, ret_val = 0; |
| 89 | |
| 90 | if (!secure_pil) |
| 91 | return 0; |
| 92 | |
| 93 | /* |
| 94 | * 8660 SCM doesn't support querying secure PIL support so just return |
| 95 | * true if not overridden on the command line. |
| 96 | */ |
| 97 | if (cpu_is_msm8x60()) |
| 98 | return 1; |
| 99 | |
| 100 | if (scm_is_call_available(SCM_SVC_PIL, PAS_IS_SUPPORTED_CMD) <= 0) |
| 101 | return 0; |
| 102 | |
| 103 | ret = scm_call(SCM_SVC_PIL, PAS_IS_SUPPORTED_CMD, &periph, |
| 104 | sizeof(periph), &ret_val, sizeof(ret_val)); |
| 105 | if (ret) |
| 106 | return ret; |
| 107 | |
| 108 | return ret_val; |
| 109 | } |
| 110 | EXPORT_SYMBOL(pas_supported); |