diff options
Diffstat (limited to 'drivers/net/fec.c')
| -rw-r--r-- | drivers/net/fec.c | 148 |
1 files changed, 132 insertions, 16 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c index 8a1c51f86414..2a71373719ae 100644 --- a/drivers/net/fec.c +++ b/drivers/net/fec.c @@ -17,6 +17,8 @@ * * Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be) * Copyright (c) 2004-2006 Macq Electronique SA. + * + * Copyright (C) 2010 Freescale Semiconductor, Inc. */ #include <linux/module.h> @@ -45,20 +47,36 @@ #include <asm/cacheflush.h> -#ifndef CONFIG_ARCH_MXC +#ifndef CONFIG_ARM #include <asm/coldfire.h> #include <asm/mcfsim.h> #endif #include "fec.h" -#ifdef CONFIG_ARCH_MXC -#include <mach/hardware.h> +#if defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28) #define FEC_ALIGNMENT 0xf #else #define FEC_ALIGNMENT 0x3 #endif +#define DRIVER_NAME "fec" + +/* Controller is ENET-MAC */ +#define FEC_QUIRK_ENET_MAC (1 << 0) +/* Controller needs driver to swap frame */ +#define FEC_QUIRK_SWAP_FRAME (1 << 1) + +static struct platform_device_id fec_devtype[] = { + { + .name = DRIVER_NAME, + .driver_data = 0, + }, { + .name = "imx28-fec", + .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME, + } +}; + static unsigned char macaddr[ETH_ALEN]; module_param_array(macaddr, byte, NULL, 0); MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address"); @@ -129,7 +147,8 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address"); * account when setting it. */ #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ - defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARCH_MXC) + defined(CONFIG_M520x) || defined(CONFIG_M532x) || \ + defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28) #define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16) #else #define OPT_FRAME_SIZE 0 @@ -208,10 +227,23 @@ static void fec_stop(struct net_device *dev); /* Transmitter timeout */ #define TX_TIMEOUT (2 * HZ) +static void *swap_buffer(void *bufaddr, int len) +{ + int i; + unsigned int *buf = bufaddr; + + for (i = 0; i < (len + 3) / 4; i++, buf++) + *buf = cpu_to_be32(*buf); + + return bufaddr; +} + static netdev_tx_t fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct fec_enet_private *fep = netdev_priv(dev); + const struct platform_device_id *id_entry = + platform_get_device_id(fep->pdev); struct bufdesc *bdp; void *bufaddr; unsigned short status; @@ -256,6 +288,14 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) bufaddr = fep->tx_bounce[index]; } + /* + * Some design made an incorrect assumption on endian mode of + * the system that it's running on. As the result, driver has to + * swap every frame going to and coming from the controller. + */ + if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) + swap_buffer(bufaddr, skb->len); + /* Save skb pointer */ fep->tx_skbuff[fep->skb_cur] = skb; @@ -424,6 +464,8 @@ static void fec_enet_rx(struct net_device *dev) { struct fec_enet_private *fep = netdev_priv(dev); + const struct platform_device_id *id_entry = + platform_get_device_id(fep->pdev); struct bufdesc *bdp; unsigned short status; struct sk_buff *skb; @@ -487,6 +529,9 @@ fec_enet_rx(struct net_device *dev) dma_unmap_single(NULL, bdp->cbd_bufaddr, bdp->cbd_datlen, DMA_FROM_DEVICE); + if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) + swap_buffer(data, pkt_len); + /* This does 16 byte alignment, exactly what we need. * The packet length includes FCS, but we don't want to * include that when passing upstream as it messes up @@ -689,6 +734,7 @@ static int fec_enet_mii_probe(struct net_device *dev) char mdio_bus_id[MII_BUS_ID_SIZE]; char phy_name[MII_BUS_ID_SIZE + 3]; int phy_id; + int dev_id = fep->pdev->id; fep->phy_dev = NULL; @@ -700,6 +746,8 @@ static int fec_enet_mii_probe(struct net_device *dev) continue; if (fep->mii_bus->phy_map[phy_id]->phy_id == 0) continue; + if (dev_id--) + continue; strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE); break; } @@ -737,10 +785,35 @@ static int fec_enet_mii_probe(struct net_device *dev) static int fec_enet_mii_init(struct platform_device *pdev) { + static struct mii_bus *fec0_mii_bus; struct net_device *dev = platform_get_drvdata(pdev); struct fec_enet_private *fep = netdev_priv(dev); + const struct platform_device_id *id_entry = + platform_get_device_id(fep->pdev); int err = -ENXIO, i; + /* + * The dual fec interfaces are not equivalent with enet-mac. + * Here are the differences: + * + * - fec0 supports MII & RMII modes while fec1 only supports RMII + * - fec0 acts as the 1588 time master while fec1 is slave + * - external phys can only be configured by fec0 + * + * That is to say fec1 can not work independently. It only works + * when fec0 is working. The reason behind this design is that the + * second interface is added primarily for Switch mode. + * + * Because of the last point above, both phys are attached on fec0 + * mdio interface in board design, and need to be configured by + * fec0 mii_bus. + */ + if ((id_entry->driver_data & FEC_QUIRK_ENET_MAC) && pdev->id) { + /* fec1 uses fec0 mii_bus */ + fep->mii_bus = fec0_mii_bus; + return 0; + } + fep->mii_timeout = 0; /* @@ -777,6 +850,10 @@ static int fec_enet_mii_init(struct platform_device *pdev) if (mdiobus_register(fep->mii_bus)) goto err_out_free_mdio_irq; + /* save fec0 mii_bus */ + if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) + fec0_mii_bus = fep->mii_bus; + return 0; err_out_free_mdio_irq: @@ -1148,12 +1225,25 @@ static void fec_restart(struct net_device *dev, int duplex) { struct fec_enet_private *fep = netdev_priv(dev); + const struct platform_device_id *id_entry = + platform_get_device_id(fep->pdev); int i; + u32 val, temp_mac[2]; /* Whack a reset. We should wait for this. */ writel(1, fep->hwp + FEC_ECNTRL); udelay(10); + /* + * enet-mac reset will reset mac address registers too, + * so need to reconfigure it. + */ + if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { + memcpy(&temp_mac, dev->dev_addr, ETH_ALEN); + writel(cpu_to_be32(temp_mac[0]), fep->hwp + FEC_ADDR_LOW); + writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH); + } + /* Clear any outstanding interrupt. */ writel(0xffc00000, fep->hwp + FEC_IEVENT); @@ -1200,20 +1290,45 @@ fec_restart(struct net_device *dev, int duplex) /* Set MII speed */ writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); -#ifdef FEC_MIIGSK_ENR - if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) { - /* disable the gasket and wait */ - writel(0, fep->hwp + FEC_MIIGSK_ENR); - while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4) - udelay(1); + /* + * The phy interface and speed need to get configured + * differently on enet-mac. + */ + if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { + val = readl(fep->hwp + FEC_R_CNTRL); - /* configure the gasket: RMII, 50 MHz, no loopback, no echo */ - writel(1, fep->hwp + FEC_MIIGSK_CFGR); + /* MII or RMII */ + if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) + val |= (1 << 8); + else + val &= ~(1 << 8); - /* re-enable the gasket */ - writel(2, fep->hwp + FEC_MIIGSK_ENR); - } + /* 10M or 100M */ + if (fep->phy_dev && fep->phy_dev->speed == SPEED_100) + val &= ~(1 << 9); + else + val |= (1 << 9); + + writel(val, fep->hwp + FEC_R_CNTRL); + } else { +#ifdef FEC_MIIGSK_ENR + if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) { + /* disable the gasket and wait */ + writel(0, fep->hwp + FEC_MIIGSK_ENR); + while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4) + udelay(1); + + /* + * configure the gasket: + * RMII, 50 MHz, no loopback, no echo + */ + writel(1, fep->hwp + FEC_MIIGSK_CFGR); + + /* re-enable the gasket */ + writel(2, fep->hwp + FEC_MIIGSK_ENR); + } #endif + } /* And last, enable the transmit and receive processing */ writel(2, fep->hwp + FEC_ECNTRL); @@ -1410,12 +1525,13 @@ static const struct dev_pm_ops fec_pm_ops = { static struct platform_driver fec_driver = { .driver = { - .name = "fec", + .name = DRIVER_NAME, .owner = THIS_MODULE, #ifdef CONFIG_PM .pm = &fec_pm_ops, #endif }, + .id_table = fec_devtype, .probe = fec_probe, .remove = __devexit_p(fec_drv_remove), }; |