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 | ||
5d44ab9e SG |
125 | static int btqcomsmd_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) |
126 | { | |
127 | int ret; | |
128 | ||
129 | ret = qca_set_bdaddr_rome(hdev, bdaddr); | |
130 | if (ret) | |
131 | return ret; | |
132 | ||
133 | /* The firmware stops responding for a while after setting the bdaddr, | |
134 | * causing timeouts for subsequent commands. Sleep a bit to avoid this. | |
135 | */ | |
136 | usleep_range(1000, 10000); | |
137 | return 0; | |
138 | } | |
139 | ||
1511cc75 BA |
140 | static int btqcomsmd_probe(struct platform_device *pdev) |
141 | { | |
142 | struct btqcomsmd *btq; | |
143 | struct hci_dev *hdev; | |
144 | void *wcnss; | |
145 | int ret; | |
146 | ||
147 | btq = devm_kzalloc(&pdev->dev, sizeof(*btq), GFP_KERNEL); | |
148 | if (!btq) | |
149 | return -ENOMEM; | |
150 | ||
151 | wcnss = dev_get_drvdata(pdev->dev.parent); | |
152 | ||
153 | btq->acl_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_ACL", | |
5052de8d | 154 | btqcomsmd_acl_callback, btq); |
1511cc75 BA |
155 | if (IS_ERR(btq->acl_channel)) |
156 | return PTR_ERR(btq->acl_channel); | |
157 | ||
158 | btq->cmd_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_CMD", | |
5052de8d | 159 | btqcomsmd_cmd_callback, btq); |
9a39a927 CJ |
160 | if (IS_ERR(btq->cmd_channel)) { |
161 | ret = PTR_ERR(btq->cmd_channel); | |
162 | goto destroy_acl_channel; | |
163 | } | |
1511cc75 | 164 | |
1511cc75 | 165 | hdev = hci_alloc_dev(); |
9a39a927 CJ |
166 | if (!hdev) { |
167 | ret = -ENOMEM; | |
168 | goto destroy_cmd_channel; | |
169 | } | |
1511cc75 BA |
170 | |
171 | hci_set_drvdata(hdev, btq); | |
172 | btq->hdev = hdev; | |
173 | SET_HCIDEV_DEV(hdev, &pdev->dev); | |
174 | ||
175 | hdev->bus = HCI_SMD; | |
176 | hdev->open = btqcomsmd_open; | |
177 | hdev->close = btqcomsmd_close; | |
178 | hdev->send = btqcomsmd_send; | |
6e518111 | 179 | hdev->setup = btqcomsmd_setup; |
5d44ab9e | 180 | hdev->set_bdaddr = btqcomsmd_set_bdaddr; |
1511cc75 BA |
181 | |
182 | ret = hci_register_dev(hdev); | |
9a39a927 CJ |
183 | if (ret < 0) |
184 | goto hci_free_dev; | |
1511cc75 BA |
185 | |
186 | platform_set_drvdata(pdev, btq); | |
187 | ||
188 | return 0; | |
9a39a927 CJ |
189 | |
190 | hci_free_dev: | |
191 | hci_free_dev(hdev); | |
192 | destroy_cmd_channel: | |
193 | rpmsg_destroy_ept(btq->cmd_channel); | |
194 | destroy_acl_channel: | |
195 | rpmsg_destroy_ept(btq->acl_channel); | |
196 | ||
197 | return ret; | |
1511cc75 BA |
198 | } |
199 | ||
200 | static int btqcomsmd_remove(struct platform_device *pdev) | |
201 | { | |
202 | struct btqcomsmd *btq = platform_get_drvdata(pdev); | |
203 | ||
204 | hci_unregister_dev(btq->hdev); | |
205 | hci_free_dev(btq->hdev); | |
206 | ||
5052de8d BA |
207 | rpmsg_destroy_ept(btq->cmd_channel); |
208 | rpmsg_destroy_ept(btq->acl_channel); | |
209 | ||
1511cc75 BA |
210 | return 0; |
211 | } | |
212 | ||
213 | static const struct of_device_id btqcomsmd_of_match[] = { | |
214 | { .compatible = "qcom,wcnss-bt", }, | |
215 | { }, | |
216 | }; | |
747d3f1a | 217 | MODULE_DEVICE_TABLE(of, btqcomsmd_of_match); |
1511cc75 BA |
218 | |
219 | static struct platform_driver btqcomsmd_driver = { | |
220 | .probe = btqcomsmd_probe, | |
221 | .remove = btqcomsmd_remove, | |
222 | .driver = { | |
223 | .name = "btqcomsmd", | |
224 | .of_match_table = btqcomsmd_of_match, | |
225 | }, | |
226 | }; | |
227 | ||
228 | module_platform_driver(btqcomsmd_driver); | |
229 | ||
230 | MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>"); | |
231 | MODULE_DESCRIPTION("Qualcomm SMD HCI driver"); | |
232 | MODULE_LICENSE("GPL v2"); |