From 159198862adad7109bb347bb30a620f67beac45f Mon Sep 17 00:00:00 2001 From: Eric Miao Date: Tue, 24 Jun 2008 13:38:50 +0800 Subject: [NET] smc91x: prepare for SMC_IO_SHIFT to be a platform configurable variable Now one can use the following code #define SMC_IO_SHIFT lp->io_shift to make SMC_IO_SHIFT a variable. This, however, will slightly increase the CPU overhead and have negative impact on the network performance. The tradeoff is, this can be specified in the smc91x platform data so that multiple boards support can be built in a single zImage. Signed-off-by: Eric Miao Acked-by: Nicolas Pitre Acked-by: Jeff Garzik Signed-off-by: Russell King --- drivers/net/smc91x.c | 57 ++++++++++++++++++++++++++++------------------------ 1 file changed, 31 insertions(+), 26 deletions(-) (limited to 'drivers/net/smc91x.c') diff --git a/drivers/net/smc91x.c b/drivers/net/smc91x.c index de7a913c487c..34bfc60e8074 100644 --- a/drivers/net/smc91x.c +++ b/drivers/net/smc91x.c @@ -2050,9 +2050,11 @@ static int smc_enable_device(struct platform_device *pdev) return 0; } -static int smc_request_attrib(struct platform_device *pdev) +static int smc_request_attrib(struct platform_device *pdev, + struct net_device *ndev) { struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib"); + struct smc_local *lp = netdev_priv(ndev); if (!res) return 0; @@ -2063,9 +2065,11 @@ static int smc_request_attrib(struct platform_device *pdev) return 0; } -static void smc_release_attrib(struct platform_device *pdev) +static void smc_release_attrib(struct platform_device *pdev, + struct net_device *ndev) { struct resource * res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-attrib"); + struct smc_local *lp = netdev_priv(ndev); if (res) release_mem_region(res->start, ATTRIB_SIZE); @@ -2126,25 +2130,11 @@ static int smc_drv_probe(struct platform_device *pdev) unsigned long irq_flags = SMC_IRQ_FLAGS; int ret; - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs"); - if (!res) - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - ret = -ENODEV; - goto out; - } - - - if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) { - ret = -EBUSY; - goto out; - } - ndev = alloc_etherdev(sizeof(struct smc_local)); if (!ndev) { printk("%s: could not allocate device.\n", CARDNAME); ret = -ENOMEM; - goto out_release_io; + goto out; } SET_NETDEV_DEV(ndev, &pdev->dev); @@ -2154,9 +2144,10 @@ static int smc_drv_probe(struct platform_device *pdev) lp = netdev_priv(ndev); - if (pd) + if (pd) { memcpy(&lp->cfg, pd, sizeof(lp->cfg)); - else { + lp->io_shift = SMC91X_IO_SHIFT(lp->cfg.flags); + } else { lp->cfg.flags |= (SMC_CAN_USE_8BIT) ? SMC91X_USE_8BIT : 0; lp->cfg.flags |= (SMC_CAN_USE_16BIT) ? SMC91X_USE_16BIT : 0; lp->cfg.flags |= (SMC_CAN_USE_32BIT) ? SMC91X_USE_32BIT : 0; @@ -2165,10 +2156,24 @@ static int smc_drv_probe(struct platform_device *pdev) ndev->dma = (unsigned char)-1; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs"); + if (!res) + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -ENODEV; + goto out_free_netdev; + } + + + if (!request_mem_region(res->start, SMC_IO_EXTENT, CARDNAME)) { + ret = -EBUSY; + goto out_free_netdev; + } + ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!ires) { ret = -ENODEV; - goto out_free_netdev; + goto out_release_io; } ndev->irq = ires->start; @@ -2176,9 +2181,9 @@ static int smc_drv_probe(struct platform_device *pdev) if (ires->flags & IRQF_TRIGGER_MASK) irq_flags = ires->flags & IRQF_TRIGGER_MASK; - ret = smc_request_attrib(pdev); + ret = smc_request_attrib(pdev, ndev); if (ret) - goto out_free_netdev; + goto out_release_io; #if defined(CONFIG_SA1100_ASSABET) NCR_0 |= NCR_ENET_OSC_EN; #endif @@ -2213,11 +2218,11 @@ static int smc_drv_probe(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); iounmap(addr); out_release_attrib: - smc_release_attrib(pdev); - out_free_netdev: - free_netdev(ndev); + smc_release_attrib(pdev, ndev); out_release_io: release_mem_region(res->start, SMC_IO_EXTENT); + out_free_netdev: + free_netdev(ndev); out: printk("%s: not found (%d).\n", CARDNAME, ret); @@ -2243,7 +2248,7 @@ static int smc_drv_remove(struct platform_device *pdev) iounmap(lp->base); smc_release_datacs(pdev,ndev); - smc_release_attrib(pdev); + smc_release_attrib(pdev,ndev); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs"); if (!res) -- cgit v1.2.3