Bluetooth: hci_h5: Add support for the RTL8723BS

Implement support for the RTL8723BS chip.

Signed-off-by: Jeremy Cline <jeremy@jcline.org>
[hdegoede@redhat.com: Port from bt3wire.c to hci_h5.c, drop broken GPIO code]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 69 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index b3f762291e7f..3513dad43f3c 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -31,6 +31,7 @@
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
 
+#include "btrtl.h"
 #include "hci_uart.h"
 
 #define HCI_3WIRE_ACK_PKT       0
@@ -822,11 +823,79 @@ static void h5_serdev_remove(struct serdev_device *serdev)
         hci_uart_unregister_device(&h5->serdev_hu);
 }
 
+static int h5_btrtl_setup(struct h5 *h5)
+{
+        struct btrtl_device_info *btrtl_dev;
+        struct sk_buff *skb;
+        __le32 baudrate_data;
+        u32 device_baudrate;
+        unsigned int controller_baudrate;
+        bool flow_control;
+        int err;
+
+        btrtl_dev = btrtl_initialize(h5->hu->hdev, h5->id);
+        if (IS_ERR(btrtl_dev))
+                return PTR_ERR(btrtl_dev);
+
+        err = btrtl_get_uart_settings(h5->hu->hdev, btrtl_dev,
+                                      &controller_baudrate, &device_baudrate,
+                                      &flow_control);
+        if (err)
+                goto out_free;
+
+        baudrate_data = cpu_to_le32(device_baudrate);
+        skb = __hci_cmd_sync(h5->hu->hdev, 0xfc17, sizeof(baudrate_data),
+                             &baudrate_data, HCI_INIT_TIMEOUT);
+        if (IS_ERR(skb)) {
+                rtl_dev_err(h5->hu->hdev, "set baud rate command failed\n");
+                err = PTR_ERR(skb);
+                goto out_free;
+        } else {
+                kfree_skb(skb);
+        }
+        /* Give the device some time to set up the new baudrate. */
+        usleep_range(10000, 20000);
+
+        serdev_device_set_baudrate(h5->hu->serdev, controller_baudrate);
+        serdev_device_set_flow_control(h5->hu->serdev, flow_control);
+
+        err = btrtl_download_firmware(h5->hu->hdev, btrtl_dev);
+        /* Give the device some time before the hci-core sends it a reset */
+        usleep_range(10000, 20000);
+
+out_free:
+        btrtl_free(btrtl_dev);
+
+        return err;
+}
+
+static void h5_btrtl_open(struct h5 *h5)
+{
+        /* Devices always start with these fixed parameters */
+        serdev_device_set_flow_control(h5->hu->serdev, false);
+        serdev_device_set_parity(h5->hu->serdev, SERDEV_PARITY_EVEN);
+        serdev_device_set_baudrate(h5->hu->serdev, 115200);
+}
+
+static struct h5_vnd rtl_vnd = {
+        .setup          = h5_btrtl_setup,
+        .open           = h5_btrtl_open,
+};
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id h5_acpi_match[] = {
+        { "OBDA8723", (kernel_ulong_t)&rtl_vnd },
+        { },
+};
+MODULE_DEVICE_TABLE(acpi, h5_acpi_match);
+#endif
+
 static struct serdev_device_driver h5_serdev_driver = {
         .probe = h5_serdev_probe,
         .remove = h5_serdev_remove,
         .driver = {
                 .name = "hci_uart_h5",
+                .acpi_match_table = ACPI_PTR(h5_acpi_match),
         },
 };