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Release 4.7 drivers/net/wireless/mediatek/mt7601u/mcu.c

/*
 * (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; }

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static inline void skb_put_le32(struct sk_buff *skb, u32 val) { put_unaligned_le32(val, skb_put(skb, 4)); }

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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))); }

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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); }

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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); skb_reserve(skb, MT_DMA_HDR_LEN); memcpy(skb_put(skb, len), data, len); return skb; }

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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; }

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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; }

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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)); return mt7601u_mcu_msg_send(dev, skb, CMD_FUN_SET_OP, func == 5); }

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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; }

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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)); return mt7601u_mcu_msg_send(dev, skb, CMD_CALIBRATION_OP, true); }

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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); }

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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); }

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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, &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; }

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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); }

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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; }

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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; }

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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; }

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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; }

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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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