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Diffstat (limited to 'drivers/net/wireless/mediatek/mt7601u/mcu.c')
-rw-r--r--drivers/net/wireless/mediatek/mt7601u/mcu.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt7601u/mcu.c b/drivers/net/wireless/mediatek/mt7601u/mcu.c
new file mode 100644
index 000000000..1b5cc271a
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt7601u/mcu.c
@@ -0,0 +1,535 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * (c) Copyright 2002-2010, Ralink Technology, Inc.
+ * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ */
+
+#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,
+ FIELD_PREP(MT_TXD_CMD_INFO_SEQ, seq) |
+ FIELD_PREP(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(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);
+ skb_put_data(skb, 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 (FIELD_GET(MT_RXD_CMD_INFO_CMD_SEQ, rxfce) == seq &&
+ FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce) == CMD_DONE)
+ return 0;
+
+ dev_err(dev->dev, "Error: MCU resp evt:%lx seq:%hhx-%lx!\n",
+ FIELD_GET(MT_RXD_CMD_INFO_EVT_TYPE, rxfce),
+ seq, FIELD_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)) {
+ consume_skb(skb);
+ 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(&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(&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(FIELD_PREP(MT_TXD_INFO_TYPE, DMA_PACKET) |
+ FIELD_PREP(MT_TXD_INFO_D_PORT, CPU_TX_PORT) |
+ FIELD_PREP(MT_TXD_INFO_LEN, len));
+ memcpy(buf.buf, &reg, 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)
+ return -ENOMEM;
+ if (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 firmware_request_cache(dev->dev, MT7601U_FIRMWARE);
+
+ 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 07:35:00 +0000