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Commit 568b3ce7 authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by David S. Miller
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ravb: factor out register bit twiddling code 



The  driver has often repeated pattern of reading a register,  AND'ing and/or
OR'ing some bits  and writing  the  value back. Factor the pattern out into
ravb_modify() -- this saves 260 bytes of code with ARM gcc 4.7.3.

While at it, update Cogent Embedded's copyrights.

Signed-off-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ef5c0e25

drivers/net/ethernet/renesas/ravb.h

+3 −1
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 *

 * Copyright (C) 2014-2015 Renesas Electronics Corporation

 * Copyright (C) 2015 Renesas Solutions Corp.

 * Copyright (C) 2015 Cogent Embedded, Inc. <source@cogentembedded.com>

 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>

 *

 * Based on the SuperH Ethernet driver

 *
@@ -837,6 +837,8 @@ static inline void ravb_write(struct net_device *ndev, u32 data, 
	iowrite32(data, priv->addr + reg);

}



void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,

		 u32 set);

int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value);



irqreturn_t ravb_ptp_interrupt(struct net_device *ndev);

drivers/net/ethernet/renesas/ravb_main.c

+27 −41
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 *

 * Copyright (C) 2014-2015 Renesas Electronics Corporation

 * Copyright (C) 2015 Renesas Solutions Corp.

 * Copyright (C) 2015 Cogent Embedded, Inc. <source@cogentembedded.com>

 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>

 *

 * Based on the SuperH Ethernet driver

 *
@@ -42,6 +42,12 @@ 
		 NETIF_MSG_RX_ERR | \

		 NETIF_MSG_TX_ERR)



void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,

		 u32 set)

{

	ravb_write(ndev, (ravb_read(ndev, reg) & ~clear) | set, reg);

}



int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value)

{

	int i;
@@ -59,8 +65,7 @@ static int ravb_config(struct net_device *ndev) 
	int error;



	/* Set config mode */

	ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG,

		   CCC);

	ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG);

	/* Check if the operating mode is changed to the config mode */

	error = ravb_wait(ndev, CSR, CSR_OPS, CSR_OPS_CONFIG);

	if (error)
@@ -72,13 +77,8 @@ static int ravb_config(struct net_device *ndev) 
static void ravb_set_duplex(struct net_device *ndev)

{

	struct ravb_private *priv = netdev_priv(ndev);

	u32 ecmr = ravb_read(ndev, ECMR);



	if (priv->duplex)	/* Full */

		ecmr |=  ECMR_DM;

	else			/* Half */

		ecmr &= ~ECMR_DM;

	ravb_write(ndev, ecmr, ECMR);

	ravb_modify(ndev, ECMR, ECMR_DM, priv->duplex ? ECMR_DM : 0);

}



static void ravb_set_rate(struct net_device *ndev)
@@ -131,13 +131,8 @@ static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set) 
{

	struct ravb_private *priv = container_of(ctrl, struct ravb_private,

						 mdiobb);

	u32 pir = ravb_read(priv->ndev, PIR);



	if (set)

		pir |=  mask;

	else

		pir &= ~mask;

	ravb_write(priv->ndev, pir, PIR);

	ravb_modify(priv->ndev, PIR, mask, set ? mask : 0);

}



/* MDC pin control */
@@ -393,9 +388,9 @@ static int ravb_dmac_init(struct net_device *ndev) 
	ravb_ring_format(ndev, RAVB_NC);



#if defined(__LITTLE_ENDIAN)

	ravb_write(ndev, ravb_read(ndev, CCC) & ~CCC_BOC, CCC);

	ravb_modify(ndev, CCC, CCC_BOC, 0);

#else

	ravb_write(ndev, ravb_read(ndev, CCC) | CCC_BOC, CCC);

	ravb_modify(ndev, CCC, CCC_BOC, CCC_BOC);

#endif



	/* Set AVB RX */
@@ -418,8 +413,7 @@ static int ravb_dmac_init(struct net_device *ndev) 
	ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);



	/* Setting the control will start the AVB-DMAC process. */

	ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_OPERATION,

		   CCC);

	ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_OPERATION);



	return 0;

}
@@ -493,7 +487,7 @@ static void ravb_get_tx_tstamp(struct net_device *ndev) 
				break;

			}

		}

		ravb_write(ndev, ravb_read(ndev, TCCR) | TCCR_TFR, TCCR);

		ravb_modify(ndev, TCCR, TCCR_TFR, TCCR_TFR);

	}

}
@@ -613,13 +607,13 @@ static bool ravb_rx(struct net_device *ndev, int *quota, int q) 
static void ravb_rcv_snd_disable(struct net_device *ndev)

{

	/* Disable TX and RX */

	ravb_write(ndev, ravb_read(ndev, ECMR) & ~(ECMR_RE | ECMR_TE), ECMR);

	ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);

}



static void ravb_rcv_snd_enable(struct net_device *ndev)

{

	/* Enable TX and RX */

	ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_RE | ECMR_TE, ECMR);

	ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);

}



/* function for waiting dma process finished */
@@ -812,8 +806,8 @@ static int ravb_poll(struct napi_struct *napi, int budget) 


	/* Re-enable RX/TX interrupts */

	spin_lock_irqsave(&priv->lock, flags);

	ravb_write(ndev, ravb_read(ndev, RIC0) | mask, RIC0);

	ravb_write(ndev, ravb_read(ndev, TIC)  | mask,  TIC);

	ravb_modify(ndev, RIC0, mask, mask);

	ravb_modify(ndev, TIC,  mask, mask);

	mmiowb();

	spin_unlock_irqrestore(&priv->lock, flags);
@@ -852,8 +846,7 @@ static void ravb_adjust_link(struct net_device *ndev) 
			ravb_set_rate(ndev);

		}

		if (!priv->link) {

			ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_TXF,

				   ECMR);

			ravb_modify(ndev, ECMR, ECMR_TXF, 0);

			new_state = true;

			priv->link = phydev->link;

			if (priv->no_avb_link)
@@ -1393,7 +1386,7 @@ static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev) 
	desc--;

	desc->die_dt = DT_FSTART;



	ravb_write(ndev, ravb_read(ndev, TCCR) | (TCCR_TSRQ0 << q), TCCR);

	ravb_modify(ndev, TCCR, TCCR_TSRQ0 << q, TCCR_TSRQ0 << q);



	priv->cur_tx[q] += NUM_TX_DESC;

	if (priv->cur_tx[q] - priv->dirty_tx[q] >
@@ -1468,15 +1461,10 @@ static void ravb_set_rx_mode(struct net_device *ndev) 
{

	struct ravb_private *priv = netdev_priv(ndev);

	unsigned long flags;

	u32 ecmr;



	spin_lock_irqsave(&priv->lock, flags);

	ecmr = ravb_read(ndev, ECMR);

	if (ndev->flags & IFF_PROMISC)

		ecmr |=  ECMR_PRM;

	else

		ecmr &= ~ECMR_PRM;

	ravb_write(ndev, ecmr, ECMR);

	ravb_modify(ndev, ECMR, ECMR_PRM,

		    ndev->flags & IFF_PROMISC ? ECMR_PRM : 0);

	mmiowb();

	spin_unlock_irqrestore(&priv->lock, flags);

}
@@ -1804,14 +1792,12 @@ static int ravb_probe(struct platform_device *pdev) 


	/* Set AVB config mode */

	if (chip_id == RCAR_GEN2) {

		ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) |

			   CCC_OPC_CONFIG, CCC);

		ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG);

		/* Set CSEL value */

		ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_CSEL) |

			   CCC_CSEL_HPB, CCC);

		ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);

	} else {

		ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) |

			   CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB, CCC);

		ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG |

			    CCC_GAC | CCC_CSEL_HPB);

	}



	/* Set CSEL value */
@@ -1824,7 +1810,7 @@ static int ravb_probe(struct platform_device *pdev) 
		goto out_release;



	/* Request GTI loading */

	ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR);

	ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);



	/* Allocate descriptor base address table */

	priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;

drivers/net/ethernet/renesas/ravb_ptp.c

+6 −19
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 *

 * Copyright (C) 2013-2015 Renesas Electronics Corporation

 * Copyright (C) 2015 Renesas Solutions Corp.

 * Copyright (C) 2015 Cogent Embedded, Inc. <source@cogentembedded.com>

 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by
@@ -21,7 +21,7 @@ static int ravb_ptp_tcr_request(struct ravb_private *priv, u32 request) 
	if (error)

		return error;



	ravb_write(ndev, ravb_read(ndev, GCCR) | request, GCCR);

	ravb_modify(ndev, GCCR, request, request);

	return ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);

}
@@ -185,7 +185,6 @@ static int ravb_ptp_extts(struct ptp_clock_info *ptp, 
						 ptp.info);

	struct net_device *ndev = priv->ndev;

	unsigned long flags;

	u32 gic;



	if (req->index)

		return -EINVAL;
@@ -195,12 +194,7 @@ static int ravb_ptp_extts(struct ptp_clock_info *ptp, 
	priv->ptp.extts[req->index] = on;



	spin_lock_irqsave(&priv->lock, flags);

	gic = ravb_read(ndev, GIC);

	if (on)

		gic |= GIC_PTCE;

	else

		gic &= ~GIC_PTCE;

	ravb_write(ndev, gic, GIC);

	ravb_modify(ndev, GIC, GIC_PTCE, on ? GIC_PTCE : 0);

	mmiowb();

	spin_unlock_irqrestore(&priv->lock, flags);
@@ -216,7 +210,6 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp, 
	struct ravb_ptp_perout *perout;

	unsigned long flags;

	int error = 0;

	u32 gic;



	if (req->index)

		return -EINVAL;
@@ -248,9 +241,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp, 
		error = ravb_ptp_update_compare(priv, (u32)start_ns);

		if (!error) {

			/* Unmask interrupt */

			gic = ravb_read(ndev, GIC);

			gic |= GIC_PTME;

			ravb_write(ndev, gic, GIC);

			ravb_modify(ndev, GIC, GIC_PTME, GIC_PTME);

		}

	} else	{

		spin_lock_irqsave(&priv->lock, flags);
@@ -259,9 +250,7 @@ static int ravb_ptp_perout(struct ptp_clock_info *ptp, 
		perout->period = 0;



		/* Mask interrupt */

		gic = ravb_read(ndev, GIC);

		gic &= ~GIC_PTME;

		ravb_write(ndev, gic, GIC);

		ravb_modify(ndev, GIC, GIC_PTME, 0);

	}

	mmiowb();

	spin_unlock_irqrestore(&priv->lock, flags);
@@ -331,7 +320,6 @@ void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev) 
{

	struct ravb_private *priv = netdev_priv(ndev);

	unsigned long flags;

	u32 gccr;



	priv->ptp.info = ravb_ptp_info;
@@ -340,8 +328,7 @@ void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev) 


	spin_lock_irqsave(&priv->lock, flags);

	ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);

	gccr = ravb_read(ndev, GCCR) & ~GCCR_TCSS;

	ravb_write(ndev, gccr | GCCR_TCSS_ADJGPTP, GCCR);

	ravb_modify(ndev, GCCR, GCCR_TCSS, GCCR_TCSS_ADJGPTP);

	mmiowb();

	spin_unlock_irqrestore(&priv->lock, flags);