Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) 2016, Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (c) 2015, Sony Mobile Communications Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/rpmsg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/soc/qcom/wcnss_ctrl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <net/bluetooth/bluetooth.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <net/bluetooth/hci_core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "btqca.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) struct btqcomsmd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	struct hci_dev *hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	struct rpmsg_endpoint *acl_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct rpmsg_endpoint *cmd_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static int btqcomsmd_recv(struct hci_dev *hdev, unsigned int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 			   const void *data, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	/* Use GFP_ATOMIC as we're in IRQ context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	skb = bt_skb_alloc(count, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		hdev->stat.err_rx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	hci_skb_pkt_type(skb) = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	skb_put_data(skb, data, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	return hci_recv_frame(hdev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) static int btqcomsmd_acl_callback(struct rpmsg_device *rpdev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 				  int count, void *priv, u32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct btqcomsmd *btq = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	btq->hdev->stat.byte_rx += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	return btqcomsmd_recv(btq->hdev, HCI_ACLDATA_PKT, data, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) static int btqcomsmd_cmd_callback(struct rpmsg_device *rpdev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 				  int count, void *priv, u32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct btqcomsmd *btq = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	btq->hdev->stat.byte_rx += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	return btqcomsmd_recv(btq->hdev, HCI_EVENT_PKT, data, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static int btqcomsmd_send(struct hci_dev *hdev, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct btqcomsmd *btq = hci_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	switch (hci_skb_pkt_type(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	case HCI_ACLDATA_PKT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		ret = rpmsg_send(btq->acl_channel, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			hdev->stat.err_tx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		hdev->stat.acl_tx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		hdev->stat.byte_tx += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	case HCI_COMMAND_PKT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		ret = rpmsg_send(btq->cmd_channel, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			hdev->stat.err_tx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		hdev->stat.cmd_tx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		hdev->stat.byte_tx += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		ret = -EILSEQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) static int btqcomsmd_open(struct hci_dev *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int btqcomsmd_close(struct hci_dev *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int btqcomsmd_setup(struct hci_dev *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (IS_ERR(skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		return PTR_ERR(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	/* Devices do not have persistent storage for BD address. Retrieve
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	 * it from the firmware node property.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static int btqcomsmd_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	struct btqcomsmd *btq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	struct hci_dev *hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	void *wcnss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	btq = devm_kzalloc(&pdev->dev, sizeof(*btq), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (!btq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	wcnss = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	btq->acl_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_ACL",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 						   btqcomsmd_acl_callback, btq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (IS_ERR(btq->acl_channel))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		return PTR_ERR(btq->acl_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	btq->cmd_channel = qcom_wcnss_open_channel(wcnss, "APPS_RIVA_BT_CMD",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 						   btqcomsmd_cmd_callback, btq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	if (IS_ERR(btq->cmd_channel)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		ret = PTR_ERR(btq->cmd_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		goto destroy_acl_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	hdev = hci_alloc_dev();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (!hdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		goto destroy_cmd_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	hci_set_drvdata(hdev, btq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	btq->hdev = hdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	SET_HCIDEV_DEV(hdev, &pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	hdev->bus = HCI_SMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	hdev->open = btqcomsmd_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	hdev->close = btqcomsmd_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	hdev->send = btqcomsmd_send;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	hdev->setup = btqcomsmd_setup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	hdev->set_bdaddr = qca_set_bdaddr_rome;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	ret = hci_register_dev(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		goto hci_free_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	platform_set_drvdata(pdev, btq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) hci_free_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	hci_free_dev(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) destroy_cmd_channel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	rpmsg_destroy_ept(btq->cmd_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) destroy_acl_channel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	rpmsg_destroy_ept(btq->acl_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static int btqcomsmd_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	struct btqcomsmd *btq = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	hci_unregister_dev(btq->hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	hci_free_dev(btq->hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	rpmsg_destroy_ept(btq->cmd_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	rpmsg_destroy_ept(btq->acl_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static const struct of_device_id btqcomsmd_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	{ .compatible = "qcom,wcnss-bt", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) MODULE_DEVICE_TABLE(of, btqcomsmd_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static struct platform_driver btqcomsmd_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	.probe = btqcomsmd_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	.remove = btqcomsmd_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	.driver  = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		.name  = "btqcomsmd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		.of_match_table = btqcomsmd_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) module_platform_driver(btqcomsmd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) MODULE_DESCRIPTION("Qualcomm SMD HCI driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) MODULE_LICENSE("GPL v2");