diff options
Diffstat (limited to 'kernel/drivers/nfc/s3fwrn5/nci.c')
| -rw-r--r-- | kernel/drivers/nfc/s3fwrn5/nci.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/kernel/drivers/nfc/s3fwrn5/nci.c b/kernel/drivers/nfc/s3fwrn5/nci.c new file mode 100644 index 000000000..075e4e877 --- /dev/null +++ b/kernel/drivers/nfc/s3fwrn5/nci.c @@ -0,0 +1,165 @@ +/* + * NCI based driver for Samsung S3FWRN5 NFC chip + * + * Copyright (C) 2015 Samsung Electrnoics + * Robert Baldyga <r.baldyga@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/completion.h> +#include <linux/firmware.h> + +#include "s3fwrn5.h" +#include "nci.h" + +static int s3fwrn5_nci_prop_rsp(struct nci_dev *ndev, struct sk_buff *skb) +{ + __u8 status = skb->data[0]; + + nci_req_complete(ndev, status); + return 0; +} + +static struct nci_driver_ops s3fwrn5_nci_prop_ops[] = { + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_AGAIN), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_GET_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_SET_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_GET_RFREG_VER), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_SET_RFREG_VER), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_START_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_STOP_RFREG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_FW_CFG), + .rsp = s3fwrn5_nci_prop_rsp, + }, + { + .opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, + NCI_PROP_WR_RESET), + .rsp = s3fwrn5_nci_prop_rsp, + }, +}; + +void s3fwrn5_nci_get_prop_ops(struct nci_driver_ops **ops, size_t *n) +{ + *ops = s3fwrn5_nci_prop_ops; + *n = ARRAY_SIZE(s3fwrn5_nci_prop_ops); +} + +#define S3FWRN5_RFREG_SECTION_SIZE 252 + +int s3fwrn5_nci_rf_configure(struct s3fwrn5_info *info, const char *fw_name) +{ + const struct firmware *fw; + struct nci_prop_fw_cfg_cmd fw_cfg; + struct nci_prop_set_rfreg_cmd set_rfreg; + struct nci_prop_stop_rfreg_cmd stop_rfreg; + u32 checksum; + int i, len; + int ret; + + ret = request_firmware(&fw, fw_name, &info->ndev->nfc_dev->dev); + if (ret < 0) + return ret; + + /* Compute rfreg checksum */ + + checksum = 0; + for (i = 0; i < fw->size; i += 4) + checksum += *((u32 *)(fw->data+i)); + + /* Set default clock configuration for external crystal */ + + fw_cfg.clk_type = 0x01; + fw_cfg.clk_speed = 0xff; + fw_cfg.clk_req = 0xff; + ret = nci_prop_cmd(info->ndev, NCI_PROP_FW_CFG, + sizeof(fw_cfg), (__u8 *)&fw_cfg); + if (ret < 0) + goto out; + + /* Start rfreg configuration */ + + dev_info(&info->ndev->nfc_dev->dev, + "rfreg configuration update: %s\n", fw_name); + + ret = nci_prop_cmd(info->ndev, NCI_PROP_START_RFREG, 0, NULL); + if (ret < 0) { + dev_err(&info->ndev->nfc_dev->dev, + "Unable to start rfreg update\n"); + goto out; + } + + /* Update rfreg */ + + set_rfreg.index = 0; + for (i = 0; i < fw->size; i += S3FWRN5_RFREG_SECTION_SIZE) { + len = (fw->size - i < S3FWRN5_RFREG_SECTION_SIZE) ? + (fw->size - i) : S3FWRN5_RFREG_SECTION_SIZE; + memcpy(set_rfreg.data, fw->data+i, len); + ret = nci_prop_cmd(info->ndev, NCI_PROP_SET_RFREG, + len+1, (__u8 *)&set_rfreg); + if (ret < 0) { + dev_err(&info->ndev->nfc_dev->dev, + "rfreg update error (code=%d)\n", ret); + goto out; + } + set_rfreg.index++; + } + + /* Finish rfreg configuration */ + + stop_rfreg.checksum = checksum & 0xffff; + ret = nci_prop_cmd(info->ndev, NCI_PROP_STOP_RFREG, + sizeof(stop_rfreg), (__u8 *)&stop_rfreg); + if (ret < 0) { + dev_err(&info->ndev->nfc_dev->dev, + "Unable to stop rfreg update\n"); + goto out; + } + + dev_info(&info->ndev->nfc_dev->dev, + "rfreg configuration update: success\n"); +out: + release_firmware(fw); + return ret; +} |