Commit | Line | Data |
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97fb5e8d | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1511cc75 BA |
2 | /* |
3 | * Copyright (c) 2016, Linaro Ltd. | |
4 | * Copyright (c) 2015, Sony Mobile Communications Inc. | |
1511cc75 BA |
5 | */ |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/slab.h> | |
5052de8d | 9 | #include <linux/rpmsg.h> |
766154b7 LP |
10 | #include <linux/of.h> |
11 | ||
1511cc75 BA |
12 | #include <linux/soc/qcom/wcnss_ctrl.h> |
13 | #include <linux/platform_device.h> | |
14 | ||
15 | #include <net/bluetooth/bluetooth.h> | |
16 | #include <net/bluetooth/hci_core.h> | |
17 | ||
18 | #include "btqca.h" | |
19 | ||
20 | struct btqcomsmd { | |
21 | struct hci_dev *hdev; | |
22 | ||
5052de8d BA |
23 | struct rpmsg_endpoint *acl_channel; |
24 | struct rpmsg_endpoint *cmd_channel; | |
1511cc75 BA |
25 | }; |
26 | ||
27 | static int btqcomsmd_recv(struct hci_dev *hdev, unsigned int type, | |
28 | const void *data, size_t count) | |
29 | { | |
30 | struct sk_buff *skb; | |
31 | ||
32 | /* Use GFP_ATOMIC as we're in IRQ context */ | |
33 | skb = bt_skb_alloc(count, GFP_ATOMIC); | |
34 | if (!skb) { | |
35 | hdev->stat.err_rx++; | |
36 | return -ENOMEM; | |
37 | } | |
38 | ||
39 | hci_skb_pkt_type(skb) = type; | |
59ae1d12 | 40 | skb_put_data(skb, data, count); |
1511cc75 BA |
41 | |
42 | return hci_recv_frame(hdev, skb); | |
43 | } | |
44 | ||
5052de8d BA |
45 | static int btqcomsmd_acl_callback(struct rpmsg_device *rpdev, void *data, |
46 | int count, void *priv, u32 addr) | |
1511cc75 | 47 | { |
5052de8d | 48 | struct btqcomsmd *btq = priv; |
1511cc75 BA |
49 | |
50 | btq->hdev->stat.byte_rx += count; | |
51 | return btqcomsmd_recv(btq->hdev, HCI_ACLDATA_PKT, data, count); | |
52 | } | |
53 | ||
5052de8d BA |
54 | static int btqcomsmd_cmd_callback(struct rpmsg_device *rpdev, void *data, |
55 | int count, void *priv, u32 addr) | |
1511cc75 | 56 | { |
5052de8d | 57 | struct btqcomsmd *btq = priv; |
1511cc75 | 58 | |
61a1ecfc | 59 | btq->hdev->stat.byte_rx += count; |
1511cc75 BA |
60 | return btqcomsmd_recv(btq->hdev, HCI_EVENT_PKT, data, count); |
61 | } | |
62 | ||
63 | static int btqcomsmd_send(struct hci_dev *hdev, struct sk_buff *skb) | |
64 | { | |
65 | struct btqcomsmd *btq = hci_get_drvdata(hdev); | |
66 | int ret; | |
67 | ||
68 | switch (hci_skb_pkt_type(skb)) { | |
69 | case HCI_ACLDATA_PKT: | |
5052de8d | 70 | ret = rpmsg_send(btq->acl_channel, skb->data, skb->len); |
61a1ecfc LP |
71 | if (ret) { |
72 | hdev->stat.err_tx++; | |
73 | break; | |
74 | } | |
1511cc75 BA |
75 | hdev->stat.acl_tx++; |
76 | hdev->stat.byte_tx += skb->len; | |
77 | break; | |
78 | case HCI_COMMAND_PKT: | |
5052de8d | 79 | ret = rpmsg_send(btq->cmd_channel, skb->data, skb->len); |
61a1ecfc LP |
80 | if (ret) { |
81 | hdev->stat.err_tx++; | |
82 | break; | |
83 | } | |
1511cc75 | 84 | hdev->stat.cmd_tx++; |
61a1ecfc | 85 | hdev->stat.byte_tx += skb->len; |
1511cc75 BA |
86 | break; |
87 | default: | |
88 | ret = -EILSEQ; | |
89 | break; | |
90 | } | |
91 | ||
67b8fbea LP |
92 | if (!ret) |
93 | kfree_skb(skb); | |
1511cc75 BA |
94 | |
95 | return ret; | |
96 | } | |
97 | ||
98 | static int btqcomsmd_open(struct hci_dev *hdev) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
103 | static int btqcomsmd_close(struct hci_dev *hdev) | |
104 | { | |
105 | return 0; | |
106 | } | |
107 | ||
6e518111 LP |
108 | static int btqcomsmd_setup(struct hci_dev *hdev) |
109 | { | |
6e518111 | 110 | struct sk_buff *skb; |
6e518111 LP |
111 | |
112 | skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT); | |
113 | if (IS_ERR(skb)) | |
114 | return PTR_ERR(skb); | |
115 | kfree_skb(skb); | |
116 | ||
de79a9df MK |
117 | /* Devices do not have persistent storage for BD address. Retrieve |
118 | * it from the firmware node property. | |
6e518111 | 119 | */ |
de79a9df | 120 | set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks); |
6e518111 LP |
121 | |
122 | return 0; | |
123 | } | |
124 | ||
1511cc75 BA |
125 | static int btqcomsmd_probe(struct platform_device *pdev) |
126 | { | |
127 | struct btqcomsmd *btq; | |
128 | struct hci_dev *hdev; | |
129 | void *wcnss; | |
130 | int ret; | |
131 | ||
132 | btq = devm_kzalloc(&pdev->dev, sizeof(*btq), GFP_KERNEL); | |
133 | if (!btq) | |
134 | return -ENOMEM; | |
135 | ||
136 | wcnss = dev_get_drvdata(pdev->dev.parent); | |
137 | ||
138 | btq->acl_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_ACL", | |
5052de8d | 139 | btqcomsmd_acl_callback, btq); |
1511cc75 BA |
140 | if (IS_ERR(btq->acl_channel)) |
141 | return PTR_ERR(btq->acl_channel); | |
142 | ||
143 | btq->cmd_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_CMD", | |
5052de8d | 144 | btqcomsmd_cmd_callback, btq); |
9a39a927 CJ |
145 | if (IS_ERR(btq->cmd_channel)) { |
146 | ret = PTR_ERR(btq->cmd_channel); | |
147 | goto destroy_acl_channel; | |
148 | } | |
1511cc75 | 149 | |
1511cc75 | 150 | hdev = hci_alloc_dev(); |
9a39a927 CJ |
151 | if (!hdev) { |
152 | ret = -ENOMEM; | |
153 | goto destroy_cmd_channel; | |
154 | } | |
1511cc75 BA |
155 | |
156 | hci_set_drvdata(hdev, btq); | |
157 | btq->hdev = hdev; | |
158 | SET_HCIDEV_DEV(hdev, &pdev->dev); | |
159 | ||
160 | hdev->bus = HCI_SMD; | |
161 | hdev->open = btqcomsmd_open; | |
162 | hdev->close = btqcomsmd_close; | |
163 | hdev->send = btqcomsmd_send; | |
6e518111 | 164 | hdev->setup = btqcomsmd_setup; |
1511cc75 BA |
165 | hdev->set_bdaddr = qca_set_bdaddr_rome; |
166 | ||
167 | ret = hci_register_dev(hdev); | |
9a39a927 CJ |
168 | if (ret < 0) |
169 | goto hci_free_dev; | |
1511cc75 BA |
170 | |
171 | platform_set_drvdata(pdev, btq); | |
172 | ||
173 | return 0; | |
9a39a927 CJ |
174 | |
175 | hci_free_dev: | |
176 | hci_free_dev(hdev); | |
177 | destroy_cmd_channel: | |
178 | rpmsg_destroy_ept(btq->cmd_channel); | |
179 | destroy_acl_channel: | |
180 | rpmsg_destroy_ept(btq->acl_channel); | |
181 | ||
182 | return ret; | |
1511cc75 BA |
183 | } |
184 | ||
185 | static int btqcomsmd_remove(struct platform_device *pdev) | |
186 | { | |
187 | struct btqcomsmd *btq = platform_get_drvdata(pdev); | |
188 | ||
189 | hci_unregister_dev(btq->hdev); | |
190 | hci_free_dev(btq->hdev); | |
191 | ||
5052de8d BA |
192 | rpmsg_destroy_ept(btq->cmd_channel); |
193 | rpmsg_destroy_ept(btq->acl_channel); | |
194 | ||
1511cc75 BA |
195 | return 0; |
196 | } | |
197 | ||
198 | static const struct of_device_id btqcomsmd_of_match[] = { | |
199 | { .compatible = "qcom,wcnss-bt", }, | |
200 | { }, | |
201 | }; | |
747d3f1a | 202 | MODULE_DEVICE_TABLE(of, btqcomsmd_of_match); |
1511cc75 BA |
203 | |
204 | static struct platform_driver btqcomsmd_driver = { | |
205 | .probe = btqcomsmd_probe, | |
206 | .remove = btqcomsmd_remove, | |
207 | .driver = { | |
208 | .name = "btqcomsmd", | |
209 | .of_match_table = btqcomsmd_of_match, | |
210 | }, | |
211 | }; | |
212 | ||
213 | module_platform_driver(btqcomsmd_driver); | |
214 | ||
215 | MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>"); | |
216 | MODULE_DESCRIPTION("Qualcomm SMD HCI driver"); | |
217 | MODULE_LICENSE("GPL v2"); |