Return-Path: Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 6.6 \(1510\)) Subject: Re: [PATCH v4] Bluetooth: btmrvl: add calibration data download support From: Marcel Holtmann In-Reply-To: <1379115162-10194-1-git-send-email-bzhao@marvell.com> Date: Fri, 13 Sep 2013 18:15:09 -0700 Cc: , Gustavo Padovan , Johan Hedberg , , Mike Frysinger , Hyuckjoo Lee , Amitkumar Karwar Message-Id: <525C3DAD-2AD3-468F-8309-630EEE54A3CE@holtmann.org> References: <1379115162-10194-1-git-send-email-bzhao@marvell.com> To: Bing Zhao Sender: linux-wireless-owner@vger.kernel.org List-ID: Hi Bing, > A text file containing calibration data in hex format can > be provided at following path: > > /lib/firmware/mrvl/sd8797_caldata.conf > > The data will be downloaded to firmware during initialization. > > Reviewed-by: Mike Frysinger > Signed-off-by: Amitkumar Karwar > Signed-off-by: Bing Zhao > Signed-off-by: Hyuckjoo Lee > --- > v2: Remove module parameter. The calibration data will be downloaded > only when the device speicific data file is provided. > (Marcel Holtmann) > v3: Fix crash (misaligned memory access) on ARM > v4: Simplify white space parsing and save some CPU cycles (Mike Frysinger) > > drivers/bluetooth/btmrvl_drv.h | 10 ++- > drivers/bluetooth/btmrvl_main.c | 140 +++++++++++++++++++++++++++++++++++++++- > drivers/bluetooth/btmrvl_sdio.c | 9 ++- > drivers/bluetooth/btmrvl_sdio.h | 2 + > 4 files changed, 157 insertions(+), 4 deletions(-) > > diff --git a/drivers/bluetooth/btmrvl_drv.h b/drivers/bluetooth/btmrvl_drv.h > index 27068d1..5ef5e84 100644 > --- a/drivers/bluetooth/btmrvl_drv.h > +++ b/drivers/bluetooth/btmrvl_drv.h > @@ -23,6 +23,8 @@ > #include > #include > #include > +#include > +#include > > #define BTM_HEADER_LEN 4 > #define BTM_UPLD_SIZE 2312 > @@ -41,6 +43,8 @@ struct btmrvl_thread { > struct btmrvl_device { > void *card; > struct hci_dev *hcidev; > + struct device *dev; > + const char *cal_data; > > u8 dev_type; > > @@ -91,6 +95,7 @@ struct btmrvl_private { > #define BT_CMD_HOST_SLEEP_CONFIG 0x59 > #define BT_CMD_HOST_SLEEP_ENABLE 0x5A > #define BT_CMD_MODULE_CFG_REQ 0x5B > +#define BT_CMD_LOAD_CONFIG_DATA 0x61 > > /* Sub-commands: Module Bringup/Shutdown Request/Response */ > #define MODULE_BRINGUP_REQ 0xF1 > @@ -116,10 +121,13 @@ struct btmrvl_private { > #define PS_SLEEP 0x01 > #define PS_AWAKE 0x00 > > +#define BT_CMD_DATA_SIZE 32 > +#define BT_CAL_DATA_SIZE 28 > + > struct btmrvl_cmd { > __le16 ocf_ogf; > u8 length; > - u8 data[4]; > + u8 data[BT_CMD_DATA_SIZE]; > } __packed; > > struct btmrvl_event { > diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c > index 9a9f518..77e940e 100644 > --- a/drivers/bluetooth/btmrvl_main.c > +++ b/drivers/bluetooth/btmrvl_main.c > @@ -57,8 +57,9 @@ bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb) > ocf = hci_opcode_ocf(opcode); > ogf = hci_opcode_ogf(opcode); > > - if (ocf == BT_CMD_MODULE_CFG_REQ && > - priv->btmrvl_dev.sendcmdflag) { > + if ((ocf == BT_CMD_MODULE_CFG_REQ || > + ocf == BT_CMD_LOAD_CONFIG_DATA) && > + priv->btmrvl_dev.sendcmdflag) { > priv->btmrvl_dev.sendcmdflag = false; > priv->adapter->cmd_complete = true; > wake_up_interruptible(&priv->adapter->cmd_wait_q); > @@ -552,6 +553,132 @@ static int btmrvl_service_main_thread(void *data) > return 0; > } > > +static int btmrvl_parse_cal_cfg(const u8 *src, u32 len, u8 *dst, u32 dst_size) > +{ > + const u8 *s = src; > + u8 *d = dst; > + int ret; > + u8 tmp[3]; > + > + tmp[2] = '\0'; > + while ((s - src) < len) { > + if (isspace(*s)) { > + s++; > + continue; > + } > + > + if (isxdigit(*s)) { > + if ((d - dst) >= dst_size) { > + BT_ERR("calibration data file too big!!!"); > + return -EINVAL; > + } > + > + memcpy(tmp, s, 2); > + > + ret = kstrtou8(tmp, 16, d++); > + if (ret < 0) > + return ret; > + > + s += 2; > + } else { > + s++; > + } > + } > + if (d == dst) > + return -EINVAL; > + > + return 0; > +} > + > +static int btmrvl_load_cal_data(struct btmrvl_private *priv, > + u8 *config_data) > +{ > + struct sk_buff *skb; > + struct btmrvl_cmd *cmd; > + int i; > + > + skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); > + if (!skb) > + return -ENOMEM; > + > + cmd = (struct btmrvl_cmd *)skb->data; > + cmd->ocf_ogf = > + cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_LOAD_CONFIG_DATA)); > + cmd->length = BT_CMD_DATA_SIZE; > + cmd->data[0] = 0x00; > + cmd->data[1] = 0x00; > + cmd->data[2] = 0x00; > + cmd->data[3] = BT_CMD_DATA_SIZE - 4; > + > + /* swap cal-data bytes */ > + for (i = 4; i < BT_CMD_DATA_SIZE; i++) > + cmd->data[i] = config_data[(i/4)*8 - 1 - i]; > + > + bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; > + skb_put(skb, sizeof(*cmd)); > + skb->dev = (void *)priv->btmrvl_dev.hcidev; > + skb_queue_head(&priv->adapter->tx_queue, skb); > + priv->btmrvl_dev.sendcmdflag = true; > + priv->adapter->cmd_complete = false; since the Bluetooth HCI core got ->setup() support with proper synchronous HCI request handling available for every single driver (see the Intel support in btusb.c), why not start using that with this driver as well. Regards Marcel