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Message-ID: <Ydw7EzPvwArW/siQ@Red>
Date: Mon, 10 Jan 2022 14:56:35 +0100
From: Corentin Labbe <clabbe.montjoie@...il.com>
To: Conley Lee <conleylee@...mail.com>
Cc: davem@...emloft.net, kuba@...nel.org, mripard@...nel.org,
wens@...e.org, netdev@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: ethernet: sun4i-emac: replace magic number with
macro
Le Mon, Jan 10, 2022 at 07:35:49PM +0800, Conley Lee a écrit :
> This patch remove magic numbers in sun4i-emac.c and replace with macros
> defined in sun4i-emac.h
>
> Change since v1
> ---------------
> - reformat
> - merge commits
> - add commit message
>
> Signed-off-by: Conley Lee <conleylee@...mail.com>
> ---
> drivers/net/ethernet/allwinner/sun4i-emac.c | 30 ++++++++++++---------
> drivers/net/ethernet/allwinner/sun4i-emac.h | 18 +++++++++++++
> 2 files changed, 35 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/net/ethernet/allwinner/sun4i-emac.c b/drivers/net/ethernet/allwinner/sun4i-emac.c
> index 849de4564709..98fd98feb439 100644
> --- a/drivers/net/ethernet/allwinner/sun4i-emac.c
> +++ b/drivers/net/ethernet/allwinner/sun4i-emac.c
> @@ -106,9 +106,9 @@ static void emac_update_speed(struct net_device *dev)
>
> /* set EMAC SPEED, depend on PHY */
> reg_val = readl(db->membase + EMAC_MAC_SUPP_REG);
> - reg_val &= ~(0x1 << 8);
> + reg_val &= ~EMAC_MAC_SUPP_100M;
> if (db->speed == SPEED_100)
> - reg_val |= 1 << 8;
> + reg_val |= EMAC_MAC_SUPP_100M;
> writel(reg_val, db->membase + EMAC_MAC_SUPP_REG);
> }
>
> @@ -264,7 +264,7 @@ static void emac_dma_done_callback(void *arg)
>
> /* re enable interrupt */
> reg_val = readl(db->membase + EMAC_INT_CTL_REG);
> - reg_val |= (0x01 << 8);
> + reg_val |= EMAC_INT_CTL_RX_EN;
> writel(reg_val, db->membase + EMAC_INT_CTL_REG);
>
> db->emacrx_completed_flag = 1;
> @@ -429,7 +429,7 @@ static unsigned int emac_powerup(struct net_device *ndev)
> /* initial EMAC */
> /* flush RX FIFO */
> reg_val = readl(db->membase + EMAC_RX_CTL_REG);
> - reg_val |= 0x8;
> + reg_val |= EMAC_RX_CTL_FLUSH_FIFO;
> writel(reg_val, db->membase + EMAC_RX_CTL_REG);
> udelay(1);
>
> @@ -441,8 +441,8 @@ static unsigned int emac_powerup(struct net_device *ndev)
>
> /* set MII clock */
> reg_val = readl(db->membase + EMAC_MAC_MCFG_REG);
> - reg_val &= (~(0xf << 2));
> - reg_val |= (0xD << 2);
> + reg_val &= ~EMAC_MAC_MCFG_MII_CLKD_MASK;
> + reg_val |= EMAC_MAC_MCFG_MII_CLKD_72;
> writel(reg_val, db->membase + EMAC_MAC_MCFG_REG);
>
> /* clear RX counter */
> @@ -506,7 +506,7 @@ static void emac_init_device(struct net_device *dev)
>
> /* enable RX/TX0/RX Hlevel interrup */
> reg_val = readl(db->membase + EMAC_INT_CTL_REG);
> - reg_val |= (0xf << 0) | (0x01 << 8);
> + reg_val |= (EMAC_INT_CTL_TX_EN | EMAC_INT_CTL_TX_ABRT_EN | EMAC_INT_CTL_RX_EN);
> writel(reg_val, db->membase + EMAC_INT_CTL_REG);
>
> spin_unlock_irqrestore(&db->lock, flags);
> @@ -637,7 +637,9 @@ static void emac_rx(struct net_device *dev)
> if (!rxcount) {
> db->emacrx_completed_flag = 1;
> reg_val = readl(db->membase + EMAC_INT_CTL_REG);
> - reg_val |= (0xf << 0) | (0x01 << 8);
> + reg_val |=
> + (EMAC_INT_CTL_TX_EN | EMAC_INT_CTL_TX_ABRT_EN |
> + EMAC_INT_CTL_RX_EN);
> writel(reg_val, db->membase + EMAC_INT_CTL_REG);
>
> /* had one stuck? */
> @@ -669,7 +671,9 @@ static void emac_rx(struct net_device *dev)
> writel(reg_val | EMAC_CTL_RX_EN,
> db->membase + EMAC_CTL_REG);
> reg_val = readl(db->membase + EMAC_INT_CTL_REG);
> - reg_val |= (0xf << 0) | (0x01 << 8);
> + reg_val |=
> + (EMAC_INT_CTL_TX_EN | EMAC_INT_CTL_TX_ABRT_EN |
> + EMAC_INT_CTL_RX_EN);
> writel(reg_val, db->membase + EMAC_INT_CTL_REG);
>
> db->emacrx_completed_flag = 1;
> @@ -783,20 +787,20 @@ static irqreturn_t emac_interrupt(int irq, void *dev_id)
> }
>
> /* Transmit Interrupt check */
> - if (int_status & (0x01 | 0x02))
> + if (int_status & EMAC_INT_STA_TX_COMPLETE)
> emac_tx_done(dev, db, int_status);
>
> - if (int_status & (0x04 | 0x08))
> + if (int_status & EMAC_INT_STA_TX_ABRT)
> netdev_info(dev, " ab : %x\n", int_status);
>
> /* Re-enable interrupt mask */
> if (db->emacrx_completed_flag == 1) {
> reg_val = readl(db->membase + EMAC_INT_CTL_REG);
> - reg_val |= (0xf << 0) | (0x01 << 8);
> + reg_val |= (EMAC_INT_CTL_TX_EN | EMAC_INT_CTL_TX_ABRT_EN | EMAC_INT_CTL_RX_EN);
> writel(reg_val, db->membase + EMAC_INT_CTL_REG);
> } else {
> reg_val = readl(db->membase + EMAC_INT_CTL_REG);
> - reg_val |= (0xf << 0);
> + reg_val |= (EMAC_INT_CTL_TX_EN | EMAC_INT_CTL_TX_ABRT_EN);
> writel(reg_val, db->membase + EMAC_INT_CTL_REG);
> }
>
> diff --git a/drivers/net/ethernet/allwinner/sun4i-emac.h b/drivers/net/ethernet/allwinner/sun4i-emac.h
> index 38c72d9ec600..90bd9ad77607 100644
> --- a/drivers/net/ethernet/allwinner/sun4i-emac.h
> +++ b/drivers/net/ethernet/allwinner/sun4i-emac.h
> @@ -38,6 +38,7 @@
> #define EMAC_RX_CTL_REG (0x3c)
> #define EMAC_RX_CTL_AUTO_DRQ_EN (1 << 1)
> #define EMAC_RX_CTL_DMA_EN (1 << 2)
> +#define EMAC_RX_CTL_FLUSH_FIFO (1 << 3)
> #define EMAC_RX_CTL_PASS_ALL_EN (1 << 4)
> #define EMAC_RX_CTL_PASS_CTL_EN (1 << 5)
> #define EMAC_RX_CTL_PASS_CRC_ERR_EN (1 << 6)
> @@ -61,7 +62,21 @@
> #define EMAC_RX_IO_DATA_STATUS_OK (1 << 7)
> #define EMAC_RX_FBC_REG (0x50)
> #define EMAC_INT_CTL_REG (0x54)
> +#define EMAC_INT_CTL_RX_EN (1 << 8)
> +#define EMAC_INT_CTL_TX0_EN (1)
> +#define EMAC_INT_CTL_TX1_EN (1 << 1)
> +#define EMAC_INT_CTL_TX_EN (EMAC_INT_CTL_TX0_EN | EMAC_INT_CTL_TX1_EN)
> +#define EMAC_INT_CTL_TX0_ABRT_EN (0x1 << 2)
> +#define EMAC_INT_CTL_TX1_ABRT_EN (0x1 << 3)
> +#define EMAC_INT_CTL_TX_ABRT_EN (EMAC_INT_CTL_TX0_ABRT_EN | EMAC_INT_CTL_TX1_ABRT_EN)
> #define EMAC_INT_STA_REG (0x58)
> +#define EMAC_INT_STA_TX0_COMPLETE (0x1)
> +#define EMAC_INT_STA_TX1_COMPLETE (0x1 << 1)
> +#define EMAC_INT_STA_TX_COMPLETE (EMAC_INT_STA_TX0_COMPLETE | EMAC_INT_STA_TX1_COMPLETE)
> +#define EMAC_INT_STA_TX0_ABRT (0x1 << 2)
> +#define EMAC_INT_STA_TX1_ABRT (0x1 << 3)
> +#define EMAC_INT_STA_TX_ABRT (EMAC_INT_STA_TX0_ABRT | EMAC_INT_STA_TX1_ABRT)
> +#define EMAC_INT_STA_RX_COMPLETE (0x1 << 8)
Hello
As proposed by checkpatch, I thing there are several place (like all EMAC_INT_STA) where you could use BIT(x) instead of (0xX << x)
Regards
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