projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1d065ab6 PS |
1 | /* |
| 2 | * Shared Transport driver | |
| 3 | * HCI-LL module responsible for TI proprietary HCI_LL protocol | |
| a0cc2f3b PS |
4 | * Copyright (C) 2009-2010 Texas Instruments |
| 5 | * Author: Pavan Savoy <pavan_savoy@ti.com> | |
| 1d065ab6 PS |
6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 as | |
| 9 | * published by the Free Software Foundation. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 | * | |
| 20 | */ | |
| 21 | ||
| 22 | #define pr_fmt(fmt) "(stll) :" fmt | |
| 83ef41f0 PS |
23 | #include <linux/skbuff.h> |
| 24 | #include <linux/module.h> | |
| e5558679 | 25 | #include <linux/ti_wilink_st.h> |
| 1d065ab6 PS |
26 | |
| 27 | /**********************************************************************/ | |
| 28 | /* internal functions */ | |
| 29 | static void send_ll_cmd(struct st_data_s *st_data, | |
| 30 | unsigned char cmd) | |
| 31 | { | |
| 32 | ||
| 33 | pr_info("%s: writing %x", __func__, cmd); | |
| 34 | st_int_write(st_data, &cmd, 1); | |
| 35 | return; | |
| 36 | } | |
| 37 | ||
| 38 | static void ll_device_want_to_sleep(struct st_data_s *st_data) | |
| 39 | { | |
| e6d9e64e | 40 | pr_debug("%s", __func__); |
| 1d065ab6 PS |
41 | /* sanity check */ |
| 42 | if (st_data->ll_state != ST_LL_AWAKE) | |
| 43 | pr_err("ERR hcill: ST_LL_GO_TO_SLEEP_IND" | |
| 44 | "in state %ld", st_data->ll_state); | |
| 45 | ||
| 46 | send_ll_cmd(st_data, LL_SLEEP_ACK); | |
| 47 | /* update state */ | |
| 48 | st_data->ll_state = ST_LL_ASLEEP; | |
| 49 | } | |
| 50 | ||
| 51 | static void ll_device_want_to_wakeup(struct st_data_s *st_data) | |
| 52 | { | |
| 53 | /* diff actions in diff states */ | |
| 54 | switch (st_data->ll_state) { | |
| 55 | case ST_LL_ASLEEP: | |
| 56 | send_ll_cmd(st_data, LL_WAKE_UP_ACK); /* send wake_ack */ | |
| 57 | break; | |
| 58 | case ST_LL_ASLEEP_TO_AWAKE: | |
| 59 | /* duplicate wake_ind */ | |
| 60 | pr_err("duplicate wake_ind while waiting for Wake ack"); | |
| 61 | break; | |
| 62 | case ST_LL_AWAKE: | |
| 63 | /* duplicate wake_ind */ | |
| 64 | pr_err("duplicate wake_ind already AWAKE"); | |
| 65 | break; | |
| 66 | case ST_LL_AWAKE_TO_ASLEEP: | |
| 67 | /* duplicate wake_ind */ | |
| 68 | pr_err("duplicate wake_ind"); | |
| 69 | break; | |
| 70 | } | |
| 71 | /* update state */ | |
| 72 | st_data->ll_state = ST_LL_AWAKE; | |
| 73 | } | |
| 74 | ||
| 75 | /**********************************************************************/ | |
| 76 | /* functions invoked by ST Core */ | |
| 77 | ||
| 78 | /* called when ST Core wants to | |
| 79 | * enable ST LL */ | |
| 80 | void st_ll_enable(struct st_data_s *ll) | |
| 81 | { | |
| 82 | ll->ll_state = ST_LL_AWAKE; | |
| 83 | } | |
| 84 | ||
| 85 | /* called when ST Core /local module wants to | |
| 86 | * disable ST LL */ | |
| 87 | void st_ll_disable(struct st_data_s *ll) | |
| 88 | { | |
| 89 | ll->ll_state = ST_LL_INVALID; | |
| 90 | } | |
| 91 | ||
| 92 | /* called when ST Core wants to update the state */ | |
| 93 | void st_ll_wakeup(struct st_data_s *ll) | |
| 94 | { | |
| 95 | if (likely(ll->ll_state != ST_LL_AWAKE)) { | |
| 96 | send_ll_cmd(ll, LL_WAKE_UP_IND); /* WAKE_IND */ | |
| 97 | ll->ll_state = ST_LL_ASLEEP_TO_AWAKE; | |
| 98 | } else { | |
| 99 | /* don't send the duplicate wake_indication */ | |
| 100 | pr_err(" Chip already AWAKE "); | |
| 101 | } | |
| 102 | } | |
| 103 | ||
| 104 | /* called when ST Core wants the state */ | |
| 105 | unsigned long st_ll_getstate(struct st_data_s *ll) | |
| 106 | { | |
| e6d9e64e | 107 | pr_debug(" returning state %ld", ll->ll_state); |
| 1d065ab6 PS |
108 | return ll->ll_state; |
| 109 | } | |
| 110 | ||
| 111 | /* called from ST Core, when a PM related packet arrives */ | |
| 112 | unsigned long st_ll_sleep_state(struct st_data_s *st_data, | |
| 113 | unsigned char cmd) | |
| 114 | { | |
| 115 | switch (cmd) { | |
| 116 | case LL_SLEEP_IND: /* sleep ind */ | |
| 117 | pr_info("sleep indication recvd"); | |
| 118 | ll_device_want_to_sleep(st_data); | |
| 119 | break; | |
| 120 | case LL_SLEEP_ACK: /* sleep ack */ | |
| 121 | pr_err("sleep ack rcvd: host shouldn't"); | |
| 122 | break; | |
| 123 | case LL_WAKE_UP_IND: /* wake ind */ | |
| 124 | pr_info("wake indication recvd"); | |
| 125 | ll_device_want_to_wakeup(st_data); | |
| 126 | break; | |
| 127 | case LL_WAKE_UP_ACK: /* wake ack */ | |
| 128 | pr_info("wake ack rcvd"); | |
| 129 | st_data->ll_state = ST_LL_AWAKE; | |
| 130 | break; | |
| 131 | default: | |
| 132 | pr_err(" unknown input/state "); | |
| 320920cb | 133 | return -1; |
| 1d065ab6 | 134 | } |
| 320920cb | 135 | return 0; |
| 1d065ab6 PS |
136 | } |
| 137 | ||
| 138 | /* Called from ST CORE to initialize ST LL */ | |
| 139 | long st_ll_init(struct st_data_s *ll) | |
| 140 | { | |
| 141 | /* set state to invalid */ | |
| 142 | ll->ll_state = ST_LL_INVALID; | |
| 143 | return 0; | |
| 144 | } | |
| 145 | ||
| 146 | /* Called from ST CORE to de-initialize ST LL */ | |
| 147 | long st_ll_deinit(struct st_data_s *ll) | |
| 148 | { | |
| 149 | return 0; | |
| 150 | } |