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1511cc75 BA |
1 | /* |
2 | * Copyright (c) 2016, Linaro Ltd. | |
3 | * Copyright (c) 2015, Sony Mobile Communications Inc. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 and | |
7 | * only version 2 as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/slab.h> | |
5052de8d | 17 | #include <linux/rpmsg.h> |
766154b7 LP |
18 | #include <linux/of.h> |
19 | ||
1511cc75 BA |
20 | #include <linux/soc/qcom/wcnss_ctrl.h> |
21 | #include <linux/platform_device.h> | |
22 | ||
23 | #include <net/bluetooth/bluetooth.h> | |
24 | #include <net/bluetooth/hci_core.h> | |
25 | ||
26 | #include "btqca.h" | |
27 | ||
28 | struct btqcomsmd { | |
29 | struct hci_dev *hdev; | |
30 | ||
5052de8d BA |
31 | struct rpmsg_endpoint *acl_channel; |
32 | struct rpmsg_endpoint *cmd_channel; | |
1511cc75 BA |
33 | }; |
34 | ||
35 | static int btqcomsmd_recv(struct hci_dev *hdev, unsigned int type, | |
36 | const void *data, size_t count) | |
37 | { | |
38 | struct sk_buff *skb; | |
39 | ||
40 | /* Use GFP_ATOMIC as we're in IRQ context */ | |
41 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
42 | if (!skb) { | |
43 | hdev->stat.err_rx++; | |
44 | return -ENOMEM; | |
45 | } | |
46 | ||
47 | hci_skb_pkt_type(skb) = type; | |
59ae1d12 | 48 | skb_put_data(skb, data, count); |
1511cc75 BA |
49 | |
50 | return hci_recv_frame(hdev, skb); | |
51 | } | |
52 | ||
5052de8d BA |
53 | static int btqcomsmd_acl_callback(struct rpmsg_device *rpdev, void *data, |
54 | int count, void *priv, u32 addr) | |
1511cc75 | 55 | { |
5052de8d | 56 | struct btqcomsmd *btq = priv; |
1511cc75 BA |
57 | |
58 | btq->hdev->stat.byte_rx += count; | |
59 | return btqcomsmd_recv(btq->hdev, HCI_ACLDATA_PKT, data, count); | |
60 | } | |
61 | ||
5052de8d BA |
62 | static int btqcomsmd_cmd_callback(struct rpmsg_device *rpdev, void *data, |
63 | int count, void *priv, u32 addr) | |
1511cc75 | 64 | { |
5052de8d | 65 | struct btqcomsmd *btq = priv; |
1511cc75 | 66 | |
61a1ecfc | 67 | btq->hdev->stat.byte_rx += count; |
1511cc75 BA |
68 | return btqcomsmd_recv(btq->hdev, HCI_EVENT_PKT, data, count); |
69 | } | |
70 | ||
71 | static int btqcomsmd_send(struct hci_dev *hdev, struct sk_buff *skb) | |
72 | { | |
73 | struct btqcomsmd *btq = hci_get_drvdata(hdev); | |
74 | int ret; | |
75 | ||
76 | switch (hci_skb_pkt_type(skb)) { | |
77 | case HCI_ACLDATA_PKT: | |
5052de8d | 78 | ret = rpmsg_send(btq->acl_channel, skb->data, skb->len); |
61a1ecfc LP |
79 | if (ret) { |
80 | hdev->stat.err_tx++; | |
81 | break; | |
82 | } | |
1511cc75 BA |
83 | hdev->stat.acl_tx++; |
84 | hdev->stat.byte_tx += skb->len; | |
85 | break; | |
86 | case HCI_COMMAND_PKT: | |
5052de8d | 87 | ret = rpmsg_send(btq->cmd_channel, skb->data, skb->len); |
61a1ecfc LP |
88 | if (ret) { |
89 | hdev->stat.err_tx++; | |
90 | break; | |
91 | } | |
1511cc75 | 92 | hdev->stat.cmd_tx++; |
61a1ecfc | 93 | hdev->stat.byte_tx += skb->len; |
1511cc75 BA |
94 | break; |
95 | default: | |
96 | ret = -EILSEQ; | |
97 | break; | |
98 | } | |
99 | ||
67b8fbea LP |
100 | if (!ret) |
101 | kfree_skb(skb); | |
1511cc75 BA |
102 | |
103 | return ret; | |
104 | } | |
105 | ||
106 | static int btqcomsmd_open(struct hci_dev *hdev) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static int btqcomsmd_close(struct hci_dev *hdev) | |
112 | { | |
113 | return 0; | |
114 | } | |
115 | ||
6e518111 LP |
116 | static int btqcomsmd_setup(struct hci_dev *hdev) |
117 | { | |
6e518111 | 118 | struct sk_buff *skb; |
6e518111 LP |
119 | |
120 | skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT); | |
121 | if (IS_ERR(skb)) | |
122 | return PTR_ERR(skb); | |
123 | kfree_skb(skb); | |
124 | ||
de79a9df MK |
125 | /* Devices do not have persistent storage for BD address. Retrieve |
126 | * it from the firmware node property. | |
6e518111 | 127 | */ |
de79a9df | 128 | set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks); |
6e518111 LP |
129 | |
130 | return 0; | |
131 | } | |
132 | ||
1511cc75 BA |
133 | static int btqcomsmd_probe(struct platform_device *pdev) |
134 | { | |
135 | struct btqcomsmd *btq; | |
136 | struct hci_dev *hdev; | |
137 | void *wcnss; | |
138 | int ret; | |
139 | ||
140 | btq = devm_kzalloc(&pdev->dev, sizeof(*btq), GFP_KERNEL); | |
141 | if (!btq) | |
142 | return -ENOMEM; | |
143 | ||
144 | wcnss = dev_get_drvdata(pdev->dev.parent); | |
145 | ||
146 | btq->acl_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_ACL", | |
5052de8d | 147 | btqcomsmd_acl_callback, btq); |
1511cc75 BA |
148 | if (IS_ERR(btq->acl_channel)) |
149 | return PTR_ERR(btq->acl_channel); | |
150 | ||
151 | btq->cmd_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_CMD", | |
5052de8d | 152 | btqcomsmd_cmd_callback, btq); |
1511cc75 BA |
153 | if (IS_ERR(btq->cmd_channel)) |
154 | return PTR_ERR(btq->cmd_channel); | |
155 | ||
1511cc75 BA |
156 | hdev = hci_alloc_dev(); |
157 | if (!hdev) | |
158 | return -ENOMEM; | |
159 | ||
160 | hci_set_drvdata(hdev, btq); | |
161 | btq->hdev = hdev; | |
162 | SET_HCIDEV_DEV(hdev, &pdev->dev); | |
163 | ||
164 | hdev->bus = HCI_SMD; | |
165 | hdev->open = btqcomsmd_open; | |
166 | hdev->close = btqcomsmd_close; | |
167 | hdev->send = btqcomsmd_send; | |
6e518111 | 168 | hdev->setup = btqcomsmd_setup; |
1511cc75 BA |
169 | hdev->set_bdaddr = qca_set_bdaddr_rome; |
170 | ||
171 | ret = hci_register_dev(hdev); | |
172 | if (ret < 0) { | |
173 | hci_free_dev(hdev); | |
174 | return ret; | |
175 | } | |
176 | ||
177 | platform_set_drvdata(pdev, btq); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static int btqcomsmd_remove(struct platform_device *pdev) | |
183 | { | |
184 | struct btqcomsmd *btq = platform_get_drvdata(pdev); | |
185 | ||
186 | hci_unregister_dev(btq->hdev); | |
187 | hci_free_dev(btq->hdev); | |
188 | ||
5052de8d BA |
189 | rpmsg_destroy_ept(btq->cmd_channel); |
190 | rpmsg_destroy_ept(btq->acl_channel); | |
191 | ||
1511cc75 BA |
192 | return 0; |
193 | } | |
194 | ||
195 | static const struct of_device_id btqcomsmd_of_match[] = { | |
196 | { .compatible = "qcom,wcnss-bt", }, | |
197 | { }, | |
198 | }; | |
747d3f1a | 199 | MODULE_DEVICE_TABLE(of, btqcomsmd_of_match); |
1511cc75 BA |
200 | |
201 | static struct platform_driver btqcomsmd_driver = { | |
202 | .probe = btqcomsmd_probe, | |
203 | .remove = btqcomsmd_remove, | |
204 | .driver = { | |
205 | .name = "btqcomsmd", | |
206 | .of_match_table = btqcomsmd_of_match, | |
207 | }, | |
208 | }; | |
209 | ||
210 | module_platform_driver(btqcomsmd_driver); | |
211 | ||
212 | MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>"); | |
213 | MODULE_DESCRIPTION("Qualcomm SMD HCI driver"); | |
214 | MODULE_LICENSE("GPL v2"); |