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https://github.com/outbackdingo/mt76.git
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mt76: usb: move mt76x02 mcu code in mt76x02-usb module
Introduce mt76x02_usb_mcu.c in order to contain mt76x02u mcu related code. Add mt76x02-usb module as a container for mt76x02 usb code. This is a preliminary patch to move MT_TXD_INFO, MT_MCU_MSG and MT_RX_FCE_INFO defs in mt76x02-lib module since other chipsets (e.g. mt7603) use different dma definitions Acked-by: Stanislaw Gruszka <[email protected]> Signed-off-by: Lorenzo Bianconi <[email protected]>
This commit is contained in:
Lorenzo Bianconi
committed by
Felix Fietkau
Felix Fietkau
parent
f5590b0bf3
commit
d2773ceed2
@@ -0,0 +1,358 @@
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/*
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* Copyright (C) 2018 Lorenzo Bianconi <[email protected]>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/firmware.h>
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#include "mt76.h"
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#include "dma.h"
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#include "mt76x02_mcu.h"
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#define MT_CMD_HDR_LEN 4
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#define MT_FCE_DMA_ADDR 0x0230
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#define MT_FCE_DMA_LEN 0x0234
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#define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a8
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static struct sk_buff *
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mt76x02u_mcu_msg_alloc(const void *data, int len)
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{
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struct sk_buff *skb;
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skb = alloc_skb(MT_CMD_HDR_LEN + len + 8, GFP_KERNEL);
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if (!skb)
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return NULL;
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skb_reserve(skb, MT_CMD_HDR_LEN);
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skb_put_data(skb, data, len);
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return skb;
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}
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static void
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mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len)
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{
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struct mt76_usb *usb = &dev->usb;
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u32 reg, val;
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int i;
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if (usb->mcu.burst) {
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WARN_ON_ONCE(len / 4 != usb->mcu.rp_len);
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reg = usb->mcu.rp[0].reg - usb->mcu.base;
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for (i = 0; i < usb->mcu.rp_len; i++) {
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val = get_unaligned_le32(data + 4 * i);
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usb->mcu.rp[i].reg = reg++;
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usb->mcu.rp[i].value = val;
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}
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} else {
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WARN_ON_ONCE(len / 8 != usb->mcu.rp_len);
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for (i = 0; i < usb->mcu.rp_len; i++) {
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reg = get_unaligned_le32(data + 8 * i) -
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usb->mcu.base;
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val = get_unaligned_le32(data + 8 * i + 4);
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WARN_ON_ONCE(usb->mcu.rp[i].reg != reg);
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usb->mcu.rp[i].value = val;
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}
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}
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}
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static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)
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{
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struct mt76_usb *usb = &dev->usb;
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struct mt76u_buf *buf = &usb->mcu.res;
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struct urb *urb = buf->urb;
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int i, ret;
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u32 rxfce;
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u8 *data;
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for (i = 0; i < 5; i++) {
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if (!wait_for_completion_timeout(&usb->mcu.cmpl,
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msecs_to_jiffies(300)))
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continue;
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if (urb->status)
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return -EIO;
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data = sg_virt(&urb->sg[0]);
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if (usb->mcu.rp)
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mt76x02u_multiple_mcu_reads(dev, data + 4,
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urb->actual_length - 8);
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rxfce = get_unaligned_le32(data);
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ret = mt76u_submit_buf(dev, USB_DIR_IN,
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MT_EP_IN_CMD_RESP,
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buf, GFP_KERNEL,
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mt76u_mcu_complete_urb,
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&usb->mcu.cmpl);
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if (ret)
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return ret;
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if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce) &&
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FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce) == EVT_CMD_DONE)
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return 0;
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dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n",
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FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce),
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seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce));
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}
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dev_err(dev->dev, "error: %s timed out\n", __func__);
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return -ETIMEDOUT;
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}
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static int
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__mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
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int cmd, bool wait_resp)
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{
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struct usb_interface *intf = to_usb_interface(dev->dev);
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struct usb_device *udev = interface_to_usbdev(intf);
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struct mt76_usb *usb = &dev->usb;
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unsigned int pipe;
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int ret, sent;
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u8 seq = 0;
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u32 info;
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if (!skb)
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return -EINVAL;
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if (test_bit(MT76_REMOVED, &dev->state))
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return 0;
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pipe = usb_sndbulkpipe(udev, usb->out_ep[MT_EP_OUT_INBAND_CMD]);
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if (wait_resp) {
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seq = ++usb->mcu.msg_seq & 0xf;
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if (!seq)
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seq = ++usb->mcu.msg_seq & 0xf;
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}
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info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
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FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
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MT_MCU_MSG_TYPE_CMD;
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ret = mt76u_skb_dma_info(skb, CPU_TX_PORT, info);
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if (ret)
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return ret;
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ret = usb_bulk_msg(udev, pipe, skb->data, skb->len, &sent, 500);
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if (ret)
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return ret;
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if (wait_resp)
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ret = mt76x02u_mcu_wait_resp(dev, seq);
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consume_skb(skb);
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return ret;
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}
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static int
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mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
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int cmd, bool wait_resp)
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{
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struct mt76_usb *usb = &dev->usb;
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int err;
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mutex_lock(&usb->mcu.mutex);
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err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp);
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mutex_unlock(&usb->mcu.mutex);
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return err;
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}
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static inline void skb_put_le32(struct sk_buff *skb, u32 val)
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{
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put_unaligned_le32(val, skb_put(skb, 4));
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}
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static int
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mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base,
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const struct mt76_reg_pair *data, int n)
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{
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const int CMD_RANDOM_WRITE = 12;
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const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;
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struct sk_buff *skb;
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int cnt, i, ret;
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if (!n)
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return 0;
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cnt = min(max_vals_per_cmd, n);
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skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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skb_reserve(skb, MT_DMA_HDR_LEN);
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for (i = 0; i < cnt; i++) {
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skb_put_le32(skb, base + data[i].reg);
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skb_put_le32(skb, data[i].value);
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}
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ret = mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n);
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if (ret)
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return ret;
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return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt);
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}
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static int
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mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base,
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struct mt76_reg_pair *data, int n)
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{
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const int CMD_RANDOM_READ = 10;
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const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;
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struct mt76_usb *usb = &dev->usb;
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struct sk_buff *skb;
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int cnt, i, ret;
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if (!n)
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return 0;
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cnt = min(max_vals_per_cmd, n);
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if (cnt != n)
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return -EINVAL;
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skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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skb_reserve(skb, MT_DMA_HDR_LEN);
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for (i = 0; i < cnt; i++) {
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skb_put_le32(skb, base + data[i].reg);
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skb_put_le32(skb, data[i].value);
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}
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mutex_lock(&usb->mcu.mutex);
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usb->mcu.rp = data;
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usb->mcu.rp_len = n;
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usb->mcu.base = base;
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usb->mcu.burst = false;
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ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true);
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usb->mcu.rp = NULL;
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mutex_unlock(&usb->mcu.mutex);
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return ret;
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}
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void mt76x02u_mcu_fw_reset(struct mt76_dev *dev)
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{
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mt76u_vendor_request(dev, MT_VEND_DEV_MODE,
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USB_DIR_OUT | USB_TYPE_VENDOR,
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0x1, 0, NULL, 0);
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}
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EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset);
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static int
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__mt76x02u_mcu_fw_send_data(struct mt76_dev *dev, struct mt76u_buf *buf,
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const void *fw_data, int len, u32 dst_addr)
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{
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u8 *data = sg_virt(&buf->urb->sg[0]);
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DECLARE_COMPLETION_ONSTACK(cmpl);
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__le32 info;
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u32 val;
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int err;
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info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
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FIELD_PREP(MT_MCU_MSG_LEN, len) |
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MT_MCU_MSG_TYPE_CMD);
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memcpy(data, &info, sizeof(info));
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memcpy(data + sizeof(info), fw_data, len);
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memset(data + sizeof(info) + len, 0, 4);
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mt76u_single_wr(dev, MT_VEND_WRITE_FCE,
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MT_FCE_DMA_ADDR, dst_addr);
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len = roundup(len, 4);
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mt76u_single_wr(dev, MT_VEND_WRITE_FCE,
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MT_FCE_DMA_LEN, len << 16);
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buf->len = MT_CMD_HDR_LEN + len + sizeof(info);
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err = mt76u_submit_buf(dev, USB_DIR_OUT,
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MT_EP_OUT_INBAND_CMD,
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buf, GFP_KERNEL,
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mt76u_mcu_complete_urb, &cmpl);
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if (err < 0)
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return err;
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if (!wait_for_completion_timeout(&cmpl,
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msecs_to_jiffies(1000))) {
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dev_err(dev->dev, "firmware upload timed out\n");
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usb_kill_urb(buf->urb);
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return -ETIMEDOUT;
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}
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if (mt76u_urb_error(buf->urb)) {
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dev_err(dev->dev, "firmware upload failed: %d\n",
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buf->urb->status);
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return buf->urb->status;
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}
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val = mt76u_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
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val++;
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mt76u_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
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return 0;
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}
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int mt76x02u_mcu_fw_send_data(struct mt76_dev *dev, const void *data,
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int data_len, u32 max_payload, u32 offset)
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{
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int err, len, pos = 0, max_len = max_payload - 8;
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struct mt76u_buf buf;
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err = mt76u_buf_alloc(dev, &buf, 1, max_payload, max_payload,
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GFP_KERNEL);
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if (err < 0)
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return err;
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while (data_len > 0) {
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len = min_t(int, data_len, max_len);
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err = __mt76x02u_mcu_fw_send_data(dev, &buf, data + pos,
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len, offset + pos);
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if (err < 0)
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break;
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data_len -= len;
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pos += len;
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usleep_range(5000, 10000);
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}
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mt76u_buf_free(&buf);
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return err;
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}
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EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data);
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void mt76x02u_init_mcu(struct mt76_dev *dev)
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{
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static const struct mt76_mcu_ops mt76x02u_mcu_ops = {
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.mcu_msg_alloc = mt76x02u_mcu_msg_alloc,
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.mcu_send_msg = mt76x02u_mcu_send_msg,
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.mcu_wr_rp = mt76x02u_mcu_wr_rp,
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.mcu_rd_rp = mt76x02u_mcu_rd_rp,
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};
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dev->mcu_ops = &mt76x02u_mcu_ops;
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}
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EXPORT_SYMBOL_GPL(mt76x02u_init_mcu);
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MODULE_AUTHOR("Lorenzo Bianconi <[email protected]>");
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MODULE_LICENSE("Dual BSD/GPL");
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