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1/*
2 * Shared Transport driver
3 * HCI-LL module responsible for TI proprietary HCI_LL protocol
4 * Copyright (C) 2009-2010 Texas Instruments
5 * Author: Pavan Savoy <pavan_savoy@ti.com>
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
23#include <linux/skbuff.h>
24#include <linux/module.h>
25#include <linux/platform_device.h>
26#include <linux/ti_wilink_st.h>
27
28/**********************************************************************/
29/* internal functions */
30static void send_ll_cmd(struct st_data_s *st_data,
31 unsigned char cmd)
32{
33
34 pr_debug("%s: writing %x", __func__, cmd);
35 st_int_write(st_data, &cmd, 1);
36 return;
37}
38
39static void ll_device_want_to_sleep(struct st_data_s *st_data)
40{
41 struct kim_data_s *kim_data;
42 struct ti_st_plat_data *pdata;
43
44 pr_debug("%s", __func__);
45 /* sanity check */
46 if (st_data->ll_state != ST_LL_AWAKE)
47 pr_err("ERR hcill: ST_LL_GO_TO_SLEEP_IND"
48 "in state %ld", st_data->ll_state);
49
50 send_ll_cmd(st_data, LL_SLEEP_ACK);
51 /* update state */
52 st_data->ll_state = ST_LL_ASLEEP;
53
54 /* communicate to platform about chip asleep */
55 kim_data = st_data->kim_data;
56 pdata = kim_data->kim_pdev->dev.platform_data;
57 if (pdata->chip_asleep)
58 pdata->chip_asleep(NULL);
59}
60
61static void ll_device_want_to_wakeup(struct st_data_s *st_data)
62{
63 struct kim_data_s *kim_data;
64 struct ti_st_plat_data *pdata;
65
66 /* diff actions in diff states */
67 switch (st_data->ll_state) {
68 case ST_LL_ASLEEP:
69 send_ll_cmd(st_data, LL_WAKE_UP_ACK); /* send wake_ack */
70 break;
71 case ST_LL_ASLEEP_TO_AWAKE:
72 /* duplicate wake_ind */
73 pr_err("duplicate wake_ind while waiting for Wake ack");
74 break;
75 case ST_LL_AWAKE:
76 /* duplicate wake_ind */
77 pr_err("duplicate wake_ind already AWAKE");
78 break;
79 case ST_LL_AWAKE_TO_ASLEEP:
80 /* duplicate wake_ind */
81 pr_err("duplicate wake_ind");
82 break;
83 }
84 /* update state */
85 st_data->ll_state = ST_LL_AWAKE;
86
87 /* communicate to platform about chip wakeup */
88 kim_data = st_data->kim_data;
89 pdata = kim_data->kim_pdev->dev.platform_data;
90 if (pdata->chip_asleep)
91 pdata->chip_awake(NULL);
92}
93
94/**********************************************************************/
95/* functions invoked by ST Core */
96
97/* called when ST Core wants to
98 * enable ST LL */
99void st_ll_enable(struct st_data_s *ll)
100{
101 ll->ll_state = ST_LL_AWAKE;
102}
103
104/* called when ST Core /local module wants to
105 * disable ST LL */
106void st_ll_disable(struct st_data_s *ll)
107{
108 ll->ll_state = ST_LL_INVALID;
109}
110
111/* called when ST Core wants to update the state */
112void st_ll_wakeup(struct st_data_s *ll)
113{
114 if (likely(ll->ll_state != ST_LL_AWAKE)) {
115 send_ll_cmd(ll, LL_WAKE_UP_IND); /* WAKE_IND */
116 ll->ll_state = ST_LL_ASLEEP_TO_AWAKE;
117 } else {
118 /* don't send the duplicate wake_indication */
119 pr_err(" Chip already AWAKE ");
120 }
121}
122
123/* called when ST Core wants the state */
124unsigned long st_ll_getstate(struct st_data_s *ll)
125{
126 pr_debug(" returning state %ld", ll->ll_state);
127 return ll->ll_state;
128}
129
130/* called from ST Core, when a PM related packet arrives */
131unsigned long st_ll_sleep_state(struct st_data_s *st_data,
132 unsigned char cmd)
133{
134 switch (cmd) {
135 case LL_SLEEP_IND: /* sleep ind */
136 pr_debug("sleep indication recvd");
137 ll_device_want_to_sleep(st_data);
138 break;
139 case LL_SLEEP_ACK: /* sleep ack */
140 pr_err("sleep ack rcvd: host shouldn't");
141 break;
142 case LL_WAKE_UP_IND: /* wake ind */
143 pr_debug("wake indication recvd");
144 ll_device_want_to_wakeup(st_data);
145 break;
146 case LL_WAKE_UP_ACK: /* wake ack */
147 pr_debug("wake ack rcvd");
148 st_data->ll_state = ST_LL_AWAKE;
149 break;
150 default:
151 pr_err(" unknown input/state ");
152 return -EINVAL;
153 }
154 return 0;
155}
156
157/* Called from ST CORE to initialize ST LL */
158long st_ll_init(struct st_data_s *ll)
159{
160 /* set state to invalid */
161 ll->ll_state = ST_LL_INVALID;
162 return 0;
163}
164
165/* Called from ST CORE to de-initialize ST LL */
166long st_ll_deinit(struct st_data_s *ll)
167{
168 return 0;
169}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Shared Transport driver
4 * HCI-LL module responsible for TI proprietary HCI_LL protocol
5 * Copyright (C) 2009-2010 Texas Instruments
6 * Author: Pavan Savoy <pavan_savoy@ti.com>
7 */
8
9#define pr_fmt(fmt) "(stll) :" fmt
10#include <linux/skbuff.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/ti_wilink_st.h>
14
15/**********************************************************************/
16/* internal functions */
17static void send_ll_cmd(struct st_data_s *st_data,
18 unsigned char cmd)
19{
20
21 pr_debug("%s: writing %x", __func__, cmd);
22 st_int_write(st_data, &cmd, 1);
23 return;
24}
25
26static void ll_device_want_to_sleep(struct st_data_s *st_data)
27{
28 struct kim_data_s *kim_data;
29 struct ti_st_plat_data *pdata;
30
31 pr_debug("%s", __func__);
32 /* sanity check */
33 if (st_data->ll_state != ST_LL_AWAKE)
34 pr_err("ERR hcill: ST_LL_GO_TO_SLEEP_IND"
35 "in state %ld", st_data->ll_state);
36
37 send_ll_cmd(st_data, LL_SLEEP_ACK);
38 /* update state */
39 st_data->ll_state = ST_LL_ASLEEP;
40
41 /* communicate to platform about chip asleep */
42 kim_data = st_data->kim_data;
43 pdata = kim_data->kim_pdev->dev.platform_data;
44 if (pdata->chip_asleep)
45 pdata->chip_asleep(NULL);
46}
47
48static void ll_device_want_to_wakeup(struct st_data_s *st_data)
49{
50 struct kim_data_s *kim_data;
51 struct ti_st_plat_data *pdata;
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 /* communicate to platform about chip wakeup */
75 kim_data = st_data->kim_data;
76 pdata = kim_data->kim_pdev->dev.platform_data;
77 if (pdata->chip_awake)
78 pdata->chip_awake(NULL);
79}
80
81/**********************************************************************/
82/* functions invoked by ST Core */
83
84/* called when ST Core wants to
85 * enable ST LL */
86void st_ll_enable(struct st_data_s *ll)
87{
88 ll->ll_state = ST_LL_AWAKE;
89}
90
91/* called when ST Core /local module wants to
92 * disable ST LL */
93void st_ll_disable(struct st_data_s *ll)
94{
95 ll->ll_state = ST_LL_INVALID;
96}
97
98/* called when ST Core wants to update the state */
99void st_ll_wakeup(struct st_data_s *ll)
100{
101 if (likely(ll->ll_state != ST_LL_AWAKE)) {
102 send_ll_cmd(ll, LL_WAKE_UP_IND); /* WAKE_IND */
103 ll->ll_state = ST_LL_ASLEEP_TO_AWAKE;
104 } else {
105 /* don't send the duplicate wake_indication */
106 pr_err(" Chip already AWAKE ");
107 }
108}
109
110/* called when ST Core wants the state */
111unsigned long st_ll_getstate(struct st_data_s *ll)
112{
113 pr_debug(" returning state %ld", ll->ll_state);
114 return ll->ll_state;
115}
116
117/* called from ST Core, when a PM related packet arrives */
118unsigned long st_ll_sleep_state(struct st_data_s *st_data,
119 unsigned char cmd)
120{
121 switch (cmd) {
122 case LL_SLEEP_IND: /* sleep ind */
123 pr_debug("sleep indication recvd");
124 ll_device_want_to_sleep(st_data);
125 break;
126 case LL_SLEEP_ACK: /* sleep ack */
127 pr_err("sleep ack rcvd: host shouldn't");
128 break;
129 case LL_WAKE_UP_IND: /* wake ind */
130 pr_debug("wake indication recvd");
131 ll_device_want_to_wakeup(st_data);
132 break;
133 case LL_WAKE_UP_ACK: /* wake ack */
134 pr_debug("wake ack rcvd");
135 st_data->ll_state = ST_LL_AWAKE;
136 break;
137 default:
138 pr_err(" unknown input/state ");
139 return -EINVAL;
140 }
141 return 0;
142}
143
144/* Called from ST CORE to initialize ST LL */
145long st_ll_init(struct st_data_s *ll)
146{
147 /* set state to invalid */
148 ll->ll_state = ST_LL_INVALID;
149 return 0;
150}
151
152/* Called from ST CORE to de-initialize ST LL */
153long st_ll_deinit(struct st_data_s *ll)
154{
155 return 0;
156}