From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Kleine-Budde Subject: Re: [PATCH net-next-2.6 v8 03/20] CAN : Fix endianness issue. Date: Sun, 12 Dec 2010 16:30:26 +0100 Message-ID: <4D04EA92.2010802@pengutronix.de> References: <4CFE1489.4030808@dsn.okisemi.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============7356558899495613242==" Cc: andrew.chih.howe.khor-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, qi.wang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, margie.foster-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, yong.y.wang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, socketcan-core-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org, kok.howg.ewe-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, joel.clark-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, Wolfgang Grandegger To: Tomoya MORINAGA Return-path: In-Reply-To: <4CFE1489.4030808-ECg8zkTtlr0C6LszWs/t0g@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: socketcan-core-bounces-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org Errors-To: socketcan-core-bounces-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org List-Id: netdev.vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --===============7356558899495613242== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig6811D42A31640DF4F02BB901" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig6811D42A31640DF4F02BB901 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 12/07/2010 12:03 PM, Tomoya MORINAGA wrote: > there is endianness issue both Tx and Rx. > Currently, data is set like below. > Register: > MSB--LSB > x x D0 D1 > x x D2 D3 > x x D4 D5 > x x D6 D7 >=20 > But Data to be sent must be set like below. > Register: > MSB--LSB > x x D1 D0 > x x D3 D2 > x x D5 D4 > x x D7 D6 (x means reserved area.) Nitpick inline, please fix it, then add my Acked-by Marc > Signed-off-by: Tomoya MORINAGA > --- > drivers/net/can/pch_can.c | 47 +++++++++++++++++++------------------= ------- > 1 files changed, 20 insertions(+), 27 deletions(-) >=20 > diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c > index 0b6d4f4..b17ca0c 100644 > --- a/drivers/net/can/pch_can.c > +++ b/drivers/net/can/pch_can.c > @@ -138,10 +138,7 @@ struct pch_can_if_regs { > u32 id1; > u32 id2; > u32 mcont; > - u32 dataa1; > - u32 dataa2; > - u32 datab1; > - u32 datab2; > + u32 data[4]; > u32 rsv[13]; > }; > =20 > @@ -424,10 +421,10 @@ static void pch_can_clear_buffers(struct pch_can_= priv *priv) > iowrite32(0x0, &priv->regs->ifregs[0].id1); > iowrite32(0x0, &priv->regs->ifregs[0].id2); > iowrite32(0x0, &priv->regs->ifregs[0].mcont); > - iowrite32(0x0, &priv->regs->ifregs[0].dataa1); > - iowrite32(0x0, &priv->regs->ifregs[0].dataa2); > - iowrite32(0x0, &priv->regs->ifregs[0].datab1); > - iowrite32(0x0, &priv->regs->ifregs[0].datab2); > + iowrite32(0x0, &priv->regs->ifregs[0].data[0]); > + iowrite32(0x0, &priv->regs->ifregs[0].data[1]); > + iowrite32(0x0, &priv->regs->ifregs[0].data[2]); > + iowrite32(0x0, &priv->regs->ifregs[0].data[3]); > iowrite32(PCH_CMASK_RDWR | PCH_CMASK_MASK | > PCH_CMASK_ARB | PCH_CMASK_CTRL, > &priv->regs->ifregs[0].cmask); > @@ -441,10 +438,10 @@ static void pch_can_clear_buffers(struct pch_can_= priv *priv) > iowrite32(0x0, &priv->regs->ifregs[1].id1); > iowrite32(0x0, &priv->regs->ifregs[1].id2); > iowrite32(0x0, &priv->regs->ifregs[1].mcont); > - iowrite32(0x0, &priv->regs->ifregs[1].dataa1); > - iowrite32(0x0, &priv->regs->ifregs[1].dataa2); > - iowrite32(0x0, &priv->regs->ifregs[1].datab1); > - iowrite32(0x0, &priv->regs->ifregs[1].datab2); > + iowrite32(0x0, &priv->regs->ifregs[1].data[0]); > + iowrite32(0x0, &priv->regs->ifregs[1].data[1]); > + iowrite32(0x0, &priv->regs->ifregs[1].data[2]); > + iowrite32(0x0, &priv->regs->ifregs[1].data[3]); > iowrite32(PCH_CMASK_RDWR | PCH_CMASK_MASK | > PCH_CMASK_ARB | PCH_CMASK_CTRL, > &priv->regs->ifregs[1].cmask); > @@ -707,12 +704,13 @@ static int pch_can_rx_normal(struct net_device *n= dev, u32 int_stat) > canid_t id; > u32 ide; > u32 rtr; > - int i, j, k; > + int i, k; > int rcv_pkts =3D 0; > struct sk_buff *skb; > struct can_frame *cf; > struct pch_can_priv *priv =3D netdev_priv(ndev); > struct net_device_stats *stats =3D &(priv->ndev->stats); > + u16 data_reg; > =20 > /* Reading the messsage object from the Message RAM */ > iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[0].cmask); > @@ -778,12 +776,10 @@ static int pch_can_rx_normal(struct net_device *n= dev, u32 int_stat) > ((ioread32(&priv->regs->ifregs[0].mcont)) & 0x0f); > } > =20 > - for (i =3D 0, j =3D 0; i < cf->can_dlc; j++) { > - reg =3D ioread32(&priv->regs->ifregs[0].dataa1 + j*4); > - cf->data[i++] =3D cpu_to_le32(reg & 0xff); > - if (i =3D=3D cf->can_dlc) > - break; > - cf->data[i++] =3D cpu_to_le32((reg >> 8) & 0xff); > + for (i =3D 0; i < cf->can_dlc; i +=3D 2) { > + data_reg =3D ioread16(&priv->regs->ifregs[0].data[i / 2]); > + cf->data[i] =3D data_reg & 0xff; The & 0xff is not needed cf->data is only 8bit wide. > + cf->data[i + 1] =3D data_reg >> 8; > } > =20 > netif_receive_skb(skb); > @@ -1016,10 +1012,10 @@ static int pch_close(struct net_device *ndev) > =20 > static netdev_tx_t pch_xmit(struct sk_buff *skb, struct net_device *nd= ev) > { > - int i, j; > struct pch_can_priv *priv =3D netdev_priv(ndev); > struct can_frame *cf =3D (struct can_frame *)skb->data; > int tx_buffer_avail =3D 0; > + int i; > =20 > if (can_dropped_invalid_skb(ndev, skb)) > return NETDEV_TX_OK; > @@ -1060,13 +1056,10 @@ static netdev_tx_t pch_xmit(struct sk_buff *skb= , struct net_device *ndev) > if (cf->can_id & CAN_RTR_FLAG) > pch_can_bit_clear(&priv->regs->ifregs[1].id2, PCH_ID2_DIR); > =20 > - for (i =3D 0, j =3D 0; i < cf->can_dlc; j++) { > - iowrite32(le32_to_cpu(cf->data[i++]), > - (&priv->regs->ifregs[1].dataa1) + j*4); > - if (i =3D=3D cf->can_dlc) > - break; > - iowrite32(le32_to_cpu(cf->data[i++] << 8), > - (&priv->regs->ifregs[1].dataa1) + j*4); > + /* Copy data to register */ > + for (i =3D 0; i < cf->can_dlc; i +=3D 2) { > + iowrite16(cf->data[i] | (cf->data[i + 1] << 8), > + &priv->regs->ifregs[1].data[i / 2]); > } > =20 > can_put_echo_skb(skb, ndev, tx_buffer_avail - PCH_RX_OBJ_END - 1); --=20 Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de | --------------enig6811D42A31640DF4F02BB901 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk0E6pMACgkQjTAFq1RaXHNDhwCeNCsCUUZXijS4lSgVyfDGGdmL o6UAnjYHFyHm6OTYEpEsLHk2cIppjg1W =oSfo -----END PGP SIGNATURE----- --------------enig6811D42A31640DF4F02BB901-- --===============7356558899495613242== Content-Type: text/plain; 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