From 568b3ce7a8efdc23ad2f0b9ca8d82899cf68972d Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Wed, 10 Feb 2016 01:37:44 +0300 Subject: [PATCH] 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: Sergei Shtylyov Signed-off-by: David S. Miller --- drivers/net/ethernet/renesas/ravb.h | 4 +- drivers/net/ethernet/renesas/ravb_main.c | 68 ++++++++++-------------- drivers/net/ethernet/renesas/ravb_ptp.c | 25 +++------ 3 files changed, 36 insertions(+), 61 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index 9fbe92ac225b..b2160d1b9c71 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -2,7 +2,7 @@ * * Copyright (C) 2014-2015 Renesas Electronics Corporation * Copyright (C) 2015 Renesas Solutions Corp. - * Copyright (C) 2015 Cogent Embedded, Inc. + * Copyright (C) 2015-2016 Cogent Embedded, Inc. * * 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); diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index ac43ed914fcf..c936682aae68 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -2,7 +2,7 @@ * * Copyright (C) 2014-2015 Renesas Electronics Corporation * Copyright (C) 2015 Renesas Solutions Corp. - * Copyright (C) 2015 Cogent Embedded, Inc. + * Copyright (C) 2015-2016 Cogent Embedded, Inc. * * 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; diff --git a/drivers/net/ethernet/renesas/ravb_ptp.c b/drivers/net/ethernet/renesas/ravb_ptp.c index 7a8ce920c49e..57992ccc4657 100644 --- a/drivers/net/ethernet/renesas/ravb_ptp.c +++ b/drivers/net/ethernet/renesas/ravb_ptp.c @@ -2,7 +2,7 @@ * * Copyright (C) 2013-2015 Renesas Electronics Corporation * Copyright (C) 2015 Renesas Solutions Corp. - * Copyright (C) 2015 Cogent Embedded, Inc. + * Copyright (C) 2015-2016 Cogent Embedded, Inc. * * 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);