diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2018-11-29 03:34:32 +0100 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-12-05 10:12:16 +0100 |
| commit | 4f7371314e57b21725ef208e9a37dd58d3f5d974 (patch) | |
| tree | 48a7db5818840a266f65152089f9615f7f6b40c4 /drivers/usb | |
| parent | usb/mtu3: power down device ip at setup (diff) | |
| download | linux-4f7371314e57b21725ef208e9a37dd58d3f5d974.tar.xz linux-4f7371314e57b21725ef208e9a37dd58d3f5d974.zip | |
usb: mtu3: remove QMU checksum
The QMU checksum calculation is redundant, mostly used by debug,
so remove it here.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/mtu3/mtu3_core.c | 2 | ||||
| -rw-r--r-- | drivers/usb/mtu3/mtu3_qmu.c | 26 |
2 files changed, 0 insertions, 28 deletions
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index ae70b9bfd797..3dce5fd9887d 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -592,8 +592,6 @@ static void mtu3_regs_init(struct mtu3 *mtu) mtu3_clrbits(mbase, U3D_LINK_RESET_INFO, WTCHRP_MSK); /* U2/U3 detected by HW */ mtu3_writel(mbase, U3D_DEVICE_CONF, 0); - /* enable QMU 16B checksum */ - mtu3_setbits(mbase, U3D_QCR0, QMU_CS16B_EN); /* vbus detected by HW */ mtu3_clrbits(mbase, U3D_MISC_CTRL, VBUS_FRC_EN | VBUS_ON); } diff --git a/drivers/usb/mtu3/mtu3_qmu.c b/drivers/usb/mtu3/mtu3_qmu.c index ff62ba232177..73ac042c45a8 100644 --- a/drivers/usb/mtu3/mtu3_qmu.c +++ b/drivers/usb/mtu3/mtu3_qmu.c @@ -154,27 +154,6 @@ void mtu3_gpd_ring_free(struct mtu3_ep *mep) memset(ring, 0, sizeof(*ring)); } -/* - * calculate check sum of a gpd or bd - * add "noinline" and "mb" to prevent wrong calculation - */ -static noinline u8 qmu_calc_checksum(u8 *data) -{ - u8 chksum = 0; - int i; - - data[1] = 0x0; /* set checksum to 0 */ - - mb(); /* ensure the gpd/bd is really up-to-date */ - for (i = 0; i < QMU_CHECKSUM_LEN; i++) - chksum += data[i]; - - /* Default: HWO=1, @flag[bit0] */ - chksum += 1; - - return 0xFF - chksum; -} - void mtu3_qmu_resume(struct mtu3_ep *mep) { struct mtu3 *mtu = mep->mtu; @@ -260,7 +239,6 @@ static int mtu3_prepare_tx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq) if (req->zero) gpd->ext_flag |= GPD_EXT_FLAG_ZLP; - gpd->chksum = qmu_calc_checksum((u8 *)gpd); gpd->flag |= GPD_FLAGS_HWO; mreq->gpd = gpd; @@ -295,7 +273,6 @@ static int mtu3_prepare_rx_gpd(struct mtu3_ep *mep, struct mtu3_request *mreq) gpd->next_gpd = cpu_to_le32(lower_32_bits(enq_dma)); ext_addr |= GPD_EXT_NGP(upper_32_bits(enq_dma)); gpd->rx_ext_addr = cpu_to_le16(ext_addr); - gpd->chksum = qmu_calc_checksum((u8 *)gpd); gpd->flag |= GPD_FLAGS_HWO; mreq->gpd = gpd; @@ -323,7 +300,6 @@ int mtu3_qmu_start(struct mtu3_ep *mep) /* set QMU start address */ write_txq_start_addr(mbase, epnum, ring->dma); mtu3_setbits(mbase, MU3D_EP_TXCR0(epnum), TX_DMAREQEN); - mtu3_setbits(mbase, U3D_QCR0, QMU_TX_CS_EN(epnum)); /* send zero length packet according to ZLP flag in GPD */ mtu3_setbits(mbase, U3D_QCR1, QMU_TX_ZLP(epnum)); mtu3_writel(mbase, U3D_TQERRIESR0, @@ -338,7 +314,6 @@ int mtu3_qmu_start(struct mtu3_ep *mep) } else { write_rxq_start_addr(mbase, epnum, ring->dma); mtu3_setbits(mbase, MU3D_EP_RXCR0(epnum), RX_DMAREQEN); - mtu3_setbits(mbase, U3D_QCR0, QMU_RX_CS_EN(epnum)); /* don't expect ZLP */ mtu3_clrbits(mbase, U3D_QCR3, QMU_RX_ZLP(epnum)); /* move to next GPD when receive ZLP */ @@ -441,7 +416,6 @@ static void qmu_tx_zlp_error_handler(struct mtu3 *mtu, u8 epnum) /* by pass the current GDP */ gpd_current->flag |= GPD_FLAGS_BPS; - gpd_current->chksum = qmu_calc_checksum((u8 *)gpd_current); gpd_current->flag |= GPD_FLAGS_HWO; /*enable DMAREQEN, switch back to QMU mode */ |