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- /*
- * (c) Copyright 2002-2010, Ralink Technology, Inc.
- * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * 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.
- */
- #include <linux/kernel.h>
- #include <linux/firmware.h>
- #include <linux/delay.h>
- #include <linux/usb.h>
- #include <linux/skbuff.h>
- #include "mt7601u.h"
- #include "dma.h"
- #include "mcu.h"
- #include "usb.h"
- #include "trace.h"
- #define MCU_FW_URB_MAX_PAYLOAD 0x3800
- #define MCU_FW_URB_SIZE (MCU_FW_URB_MAX_PAYLOAD + 12)
- #define MCU_RESP_URB_SIZE 1024
- static inline int firmware_running(struct mt7601u_dev *dev)
- {
- return mt7601u_rr(dev, MT_MCU_COM_REG0) == 1;
- }
- static inline void skb_put_le32(struct sk_buff *skb, u32 val)
- {
- put_unaligned_le32(val, skb_put(skb, 4));
- }
- static inline void mt7601u_dma_skb_wrap_cmd(struct sk_buff *skb,
- u8 seq, enum mcu_cmd cmd)
- {
- WARN_ON(mt7601u_dma_skb_wrap(skb, CPU_TX_PORT, DMA_COMMAND,
- MT76_SET(MT_TXD_CMD_INFO_SEQ, seq) |
- MT76_SET(MT_TXD_CMD_INFO_TYPE, cmd)));
- }
- static inline void trace_mt_mcu_msg_send_cs(struct mt7601u_dev *dev,
- struct sk_buff *skb, bool need_resp)
- {
- u32 i, csum = 0;
- for (i = 0; i < skb->len / 4; i++)
- csum ^= get_unaligned_le32(skb->data + i * 4);
- trace_mt_mcu_msg_send(dev, skb, csum, need_resp);
- }
- static struct sk_buff *
- mt7601u_mcu_msg_alloc(struct mt7601u_dev *dev, const void *data, int len)
- {
- struct sk_buff *skb;
- WARN_ON(len % 4); /* if length is not divisible by 4 we need to pad */
- skb = alloc_skb(len + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
- if (skb) {
- skb_reserve(skb, MT_DMA_HDR_LEN);
- memcpy(skb_put(skb, len), data, len);
- }
- return skb;
- }
- static int mt7601u_mcu_wait_resp(struct mt7601u_dev *dev, u8 seq)
- {
- struct urb *urb = dev->mcu.resp.urb;
- u32 rxfce;
- int urb_status, ret, i = 5;
- while (i--) {
- if (!wait_for_completion_timeout(&dev->mcu.resp_cmpl,
- msecs_to_jiffies(300))) {
- dev_warn(dev->dev, "Warning: %s retrying\n", __func__);
- continue;
- }
- /* Make copies of important data before reusing the urb */
- rxfce = get_unaligned_le32(dev->mcu.resp.buf);
- urb_status = urb->status * mt7601u_urb_has_error(urb);
- ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
- &dev->mcu.resp, GFP_KERNEL,
- mt7601u_complete_urb,
- &dev->mcu.resp_cmpl);
- if (ret)
- return ret;
- if (urb_status)
- dev_err(dev->dev, "Error: MCU resp urb failed:%d\n",
- urb_status);
- if (MT76_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce) == seq &&
- MT76_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce) == CMD_DONE)
- return 0;
- dev_err(dev->dev, "Error: MCU resp evt:%hhx seq:%hhx-%hhx!\n",
- MT76_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce),
- seq, MT76_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce));
- }
- dev_err(dev->dev, "Error: %s timed out\n", __func__);
- return -ETIMEDOUT;
- }
- static int
- mt7601u_mcu_msg_send(struct mt7601u_dev *dev, struct sk_buff *skb,
- enum mcu_cmd cmd, bool wait_resp)
- {
- struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
- unsigned cmd_pipe = usb_sndbulkpipe(usb_dev,
- dev->out_eps[MT_EP_OUT_INBAND_CMD]);
- int sent, ret;
- u8 seq = 0;
- if (test_bit(MT7601U_STATE_REMOVED, &dev->state))
- return 0;
- mutex_lock(&dev->mcu.mutex);
- if (wait_resp)
- while (!seq)
- seq = ++dev->mcu.msg_seq & 0xf;
- mt7601u_dma_skb_wrap_cmd(skb, seq, cmd);
- if (dev->mcu.resp_cmpl.done)
- dev_err(dev->dev, "Error: MCU response pre-completed!\n");
- trace_mt_mcu_msg_send_cs(dev, skb, wait_resp);
- trace_mt_submit_urb_sync(dev, cmd_pipe, skb->len);
- ret = usb_bulk_msg(usb_dev, cmd_pipe, skb->data, skb->len, &sent, 500);
- if (ret) {
- dev_err(dev->dev, "Error: send MCU cmd failed:%d\n", ret);
- goto out;
- }
- if (sent != skb->len)
- dev_err(dev->dev, "Error: %s sent != skb->len\n", __func__);
- if (wait_resp)
- ret = mt7601u_mcu_wait_resp(dev, seq);
- out:
- mutex_unlock(&dev->mcu.mutex);
- consume_skb(skb);
- return ret;
- }
- static int mt7601u_mcu_function_select(struct mt7601u_dev *dev,
- enum mcu_function func, u32 val)
- {
- struct sk_buff *skb;
- struct {
- __le32 id;
- __le32 value;
- } __packed __aligned(4) msg = {
- .id = cpu_to_le32(func),
- .value = cpu_to_le32(val),
- };
- skb = mt7601u_mcu_msg_alloc(dev, &msg, sizeof(msg));
- if (!skb)
- return -ENOMEM;
- return mt7601u_mcu_msg_send(dev, skb, CMD_FUN_SET_OP, func == 5);
- }
- int mt7601u_mcu_tssi_read_kick(struct mt7601u_dev *dev, int use_hvga)
- {
- int ret;
- if (!test_bit(MT7601U_STATE_MCU_RUNNING, &dev->state))
- return 0;
- ret = mt7601u_mcu_function_select(dev, ATOMIC_TSSI_SETTING,
- use_hvga);
- if (ret) {
- dev_warn(dev->dev, "Warning: MCU TSSI read kick failed\n");
- return ret;
- }
- dev->tssi_read_trig = true;
- return 0;
- }
- int
- mt7601u_mcu_calibrate(struct mt7601u_dev *dev, enum mcu_calibrate cal, u32 val)
- {
- struct sk_buff *skb;
- struct {
- __le32 id;
- __le32 value;
- } __packed __aligned(4) msg = {
- .id = cpu_to_le32(cal),
- .value = cpu_to_le32(val),
- };
- skb = mt7601u_mcu_msg_alloc(dev, &msg, sizeof(msg));
- if (!skb)
- return -ENOMEM;
- return mt7601u_mcu_msg_send(dev, skb, CMD_CALIBRATION_OP, true);
- }
- int mt7601u_write_reg_pairs(struct mt7601u_dev *dev, u32 base,
- const struct mt76_reg_pair *data, int n)
- {
- const int max_vals_per_cmd = INBAND_PACKET_MAX_LEN / 8;
- struct sk_buff *skb;
- int cnt, i, ret;
- if (!n)
- return 0;
- cnt = min(max_vals_per_cmd, n);
- skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
- if (!skb)
- return -ENOMEM;
- skb_reserve(skb, MT_DMA_HDR_LEN);
- for (i = 0; i < cnt; i++) {
- skb_put_le32(skb, base + data[i].reg);
- skb_put_le32(skb, data[i].value);
- }
- ret = mt7601u_mcu_msg_send(dev, skb, CMD_RANDOM_WRITE, cnt == n);
- if (ret)
- return ret;
- return mt7601u_write_reg_pairs(dev, base, data + cnt, n - cnt);
- }
- int mt7601u_burst_write_regs(struct mt7601u_dev *dev, u32 offset,
- const u32 *data, int n)
- {
- const int max_regs_per_cmd = INBAND_PACKET_MAX_LEN / 4 - 1;
- struct sk_buff *skb;
- int cnt, i, ret;
- if (!n)
- return 0;
- cnt = min(max_regs_per_cmd, n);
- skb = alloc_skb(cnt * 4 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
- if (!skb)
- return -ENOMEM;
- skb_reserve(skb, MT_DMA_HDR_LEN);
- skb_put_le32(skb, MT_MCU_MEMMAP_WLAN + offset);
- for (i = 0; i < cnt; i++)
- skb_put_le32(skb, data[i]);
- ret = mt7601u_mcu_msg_send(dev, skb, CMD_BURST_WRITE, cnt == n);
- if (ret)
- return ret;
- return mt7601u_burst_write_regs(dev, offset + cnt * 4,
- data + cnt, n - cnt);
- }
- struct mt76_fw_header {
- __le32 ilm_len;
- __le32 dlm_len;
- __le16 build_ver;
- __le16 fw_ver;
- u8 pad[4];
- char build_time[16];
- };
- struct mt76_fw {
- struct mt76_fw_header hdr;
- u8 ivb[MT_MCU_IVB_SIZE];
- u8 ilm[];
- };
- static int __mt7601u_dma_fw(struct mt7601u_dev *dev,
- const struct mt7601u_dma_buf *dma_buf,
- const void *data, u32 len, u32 dst_addr)
- {
- DECLARE_COMPLETION_ONSTACK(cmpl);
- struct mt7601u_dma_buf buf = *dma_buf; /* we need to fake length */
- __le32 reg;
- u32 val;
- int ret;
- reg = cpu_to_le32(MT76_SET(MT_TXD_INFO_TYPE, DMA_PACKET) |
- MT76_SET(MT_TXD_INFO_D_PORT, CPU_TX_PORT) |
- MT76_SET(MT_TXD_INFO_LEN, len));
- memcpy(buf.buf, ®, sizeof(reg));
- memcpy(buf.buf + sizeof(reg), data, len);
- memset(buf.buf + sizeof(reg) + len, 0, 8);
- ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE,
- MT_FCE_DMA_ADDR, dst_addr);
- if (ret)
- return ret;
- len = roundup(len, 4);
- ret = mt7601u_vendor_single_wr(dev, MT_VEND_WRITE_FCE,
- MT_FCE_DMA_LEN, len << 16);
- if (ret)
- return ret;
- buf.len = MT_DMA_HDR_LEN + len + 4;
- ret = mt7601u_usb_submit_buf(dev, USB_DIR_OUT, MT_EP_OUT_INBAND_CMD,
- &buf, GFP_KERNEL,
- mt7601u_complete_urb, &cmpl);
- if (ret)
- return ret;
- if (!wait_for_completion_timeout(&cmpl, msecs_to_jiffies(1000))) {
- dev_err(dev->dev, "Error: firmware upload timed out\n");
- usb_kill_urb(buf.urb);
- return -ETIMEDOUT;
- }
- if (mt7601u_urb_has_error(buf.urb)) {
- dev_err(dev->dev, "Error: firmware upload urb failed:%d\n",
- buf.urb->status);
- return buf.urb->status;
- }
- val = mt7601u_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
- val++;
- mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
- return 0;
- }
- static int
- mt7601u_dma_fw(struct mt7601u_dev *dev, struct mt7601u_dma_buf *dma_buf,
- const void *data, int len, u32 dst_addr)
- {
- int n, ret;
- if (len == 0)
- return 0;
- n = min(MCU_FW_URB_MAX_PAYLOAD, len);
- ret = __mt7601u_dma_fw(dev, dma_buf, data, n, dst_addr);
- if (ret)
- return ret;
- if (!mt76_poll_msec(dev, MT_MCU_COM_REG1, BIT(31), BIT(31), 500))
- return -ETIMEDOUT;
- return mt7601u_dma_fw(dev, dma_buf, data + n, len - n, dst_addr + n);
- }
- static int
- mt7601u_upload_firmware(struct mt7601u_dev *dev, const struct mt76_fw *fw)
- {
- struct mt7601u_dma_buf dma_buf;
- void *ivb;
- u32 ilm_len, dlm_len;
- int i, ret;
- ivb = kmemdup(fw->ivb, sizeof(fw->ivb), GFP_KERNEL);
- if (!ivb || mt7601u_usb_alloc_buf(dev, MCU_FW_URB_SIZE, &dma_buf)) {
- ret = -ENOMEM;
- goto error;
- }
- ilm_len = le32_to_cpu(fw->hdr.ilm_len) - sizeof(fw->ivb);
- dev_dbg(dev->dev, "loading FW - ILM %u + IVB %zu\n",
- ilm_len, sizeof(fw->ivb));
- ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm, ilm_len, sizeof(fw->ivb));
- if (ret)
- goto error;
- dlm_len = le32_to_cpu(fw->hdr.dlm_len);
- dev_dbg(dev->dev, "loading FW - DLM %u\n", dlm_len);
- ret = mt7601u_dma_fw(dev, &dma_buf, fw->ilm + ilm_len,
- dlm_len, MT_MCU_DLM_OFFSET);
- if (ret)
- goto error;
- ret = mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
- 0x12, 0, ivb, sizeof(fw->ivb));
- if (ret < 0)
- goto error;
- ret = 0;
- for (i = 100; i && !firmware_running(dev); i--)
- msleep(10);
- if (!i) {
- ret = -ETIMEDOUT;
- goto error;
- }
- dev_dbg(dev->dev, "Firmware running!\n");
- error:
- kfree(ivb);
- mt7601u_usb_free_buf(dev, &dma_buf);
- return ret;
- }
- static int mt7601u_load_firmware(struct mt7601u_dev *dev)
- {
- const struct firmware *fw;
- const struct mt76_fw_header *hdr;
- int len, ret;
- u32 val;
- mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
- MT_USB_DMA_CFG_TX_BULK_EN));
- if (firmware_running(dev))
- return 0;
- ret = request_firmware(&fw, MT7601U_FIRMWARE, dev->dev);
- if (ret)
- return ret;
- if (!fw || !fw->data || fw->size < sizeof(*hdr))
- goto err_inv_fw;
- hdr = (const struct mt76_fw_header *) fw->data;
- if (le32_to_cpu(hdr->ilm_len) <= MT_MCU_IVB_SIZE)
- goto err_inv_fw;
- len = sizeof(*hdr);
- len += le32_to_cpu(hdr->ilm_len);
- len += le32_to_cpu(hdr->dlm_len);
- if (fw->size != len)
- goto err_inv_fw;
- val = le16_to_cpu(hdr->fw_ver);
- dev_info(dev->dev,
- "Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n",
- (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf,
- le16_to_cpu(hdr->build_ver), hdr->build_time);
- len = le32_to_cpu(hdr->ilm_len);
- mt7601u_wr(dev, 0x94c, 0);
- mt7601u_wr(dev, MT_FCE_PSE_CTRL, 0);
- mt7601u_vendor_reset(dev);
- msleep(5);
- mt7601u_wr(dev, 0xa44, 0);
- mt7601u_wr(dev, 0x230, 0x84210);
- mt7601u_wr(dev, 0x400, 0x80c00);
- mt7601u_wr(dev, 0x800, 1);
- mt7601u_rmw(dev, MT_PBF_CFG, 0, (MT_PBF_CFG_TX0Q_EN |
- MT_PBF_CFG_TX1Q_EN |
- MT_PBF_CFG_TX2Q_EN |
- MT_PBF_CFG_TX3Q_EN));
- mt7601u_wr(dev, MT_FCE_PSE_CTRL, 1);
- mt7601u_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
- MT_USB_DMA_CFG_TX_BULK_EN));
- val = mt76_set(dev, MT_USB_DMA_CFG, MT_USB_DMA_CFG_TX_CLR);
- val &= ~MT_USB_DMA_CFG_TX_CLR;
- mt7601u_wr(dev, MT_USB_DMA_CFG, val);
- /* FCE tx_fs_base_ptr */
- mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_BASE_PTR, 0x400230);
- /* FCE tx_fs_max_cnt */
- mt7601u_wr(dev, MT_TX_CPU_FROM_FCE_MAX_COUNT, 1);
- /* FCE pdma enable */
- mt7601u_wr(dev, MT_FCE_PDMA_GLOBAL_CONF, 0x44);
- /* FCE skip_fs_en */
- mt7601u_wr(dev, MT_FCE_SKIP_FS, 3);
- ret = mt7601u_upload_firmware(dev, (const struct mt76_fw *)fw->data);
- release_firmware(fw);
- return ret;
- err_inv_fw:
- dev_err(dev->dev, "Invalid firmware image\n");
- release_firmware(fw);
- return -ENOENT;
- }
- int mt7601u_mcu_init(struct mt7601u_dev *dev)
- {
- int ret;
- mutex_init(&dev->mcu.mutex);
- ret = mt7601u_load_firmware(dev);
- if (ret)
- return ret;
- set_bit(MT7601U_STATE_MCU_RUNNING, &dev->state);
- return 0;
- }
- int mt7601u_mcu_cmd_init(struct mt7601u_dev *dev)
- {
- int ret;
- ret = mt7601u_mcu_function_select(dev, Q_SELECT, 1);
- if (ret)
- return ret;
- init_completion(&dev->mcu.resp_cmpl);
- if (mt7601u_usb_alloc_buf(dev, MCU_RESP_URB_SIZE, &dev->mcu.resp)) {
- mt7601u_usb_free_buf(dev, &dev->mcu.resp);
- return -ENOMEM;
- }
- ret = mt7601u_usb_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
- &dev->mcu.resp, GFP_KERNEL,
- mt7601u_complete_urb, &dev->mcu.resp_cmpl);
- if (ret) {
- mt7601u_usb_free_buf(dev, &dev->mcu.resp);
- return ret;
- }
- return 0;
- }
- void mt7601u_mcu_cmd_deinit(struct mt7601u_dev *dev)
- {
- usb_kill_urb(dev->mcu.resp.urb);
- mt7601u_usb_free_buf(dev, &dev->mcu.resp);
- }
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