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FEC: Turn FEC driver into platform device driver
This turns the fec driver into a platform device driver for new platforms. Old platforms are still supported through a FEC_LEGACY define till they are also ported. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sascha Hauer
David S. Miller
parent
196719ecec
commit
ead731837d
@ -39,6 +39,7 @@
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <asm/cacheflush.h>
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@ -49,12 +50,6 @@
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#include "fec.h"
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#if defined(CONFIG_FEC2)
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#define FEC_MAX_PORTS 2
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#else
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#define FEC_MAX_PORTS 1
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#endif
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#ifdef CONFIG_ARCH_MXC
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#include <mach/hardware.h>
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#define FEC_ALIGNMENT 0xf
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@ -62,13 +57,22 @@
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#define FEC_ALIGNMENT 0x3
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#endif
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#if defined CONFIG_M5272 || defined CONFIG_M527x || defined CONFIG_M523x \
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|| defined CONFIG_M528x || defined CONFIG_M532x || defined CONFIG_M520x
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#define FEC_LEGACY
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/*
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* Define the fixed address of the FEC hardware.
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*/
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#if defined(CONFIG_M5272)
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#define HAVE_mii_link_interrupt
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#endif
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/*
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* Define the fixed address of the FEC hardware.
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*/
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#if defined(CONFIG_FEC2)
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#define FEC_MAX_PORTS 2
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#else
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#define FEC_MAX_PORTS 1
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#endif
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static unsigned int fec_hw[] = {
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#if defined(CONFIG_M5272)
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(MCF_MBAR + 0x840),
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@ -106,6 +110,8 @@ static unsigned char fec_mac_default[] = {
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#define FEC_FLASHMAC 0
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#endif
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#endif /* FEC_LEGACY */
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/* Forward declarations of some structures to support different PHYs
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*/
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@ -189,6 +195,8 @@ struct fec_enet_private {
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struct net_device *netdev;
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struct clk *clk;
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/* The saved address of a sent-in-place packet/buffer, for skfree(). */
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unsigned char *tx_bounce[TX_RING_SIZE];
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struct sk_buff* tx_skbuff[TX_RING_SIZE];
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@ -1919,7 +1927,9 @@ mii_discover_phy(uint mii_reg, struct net_device *dev)
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printk("FEC: No PHY device found.\n");
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/* Disable external MII interface */
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fecp->fec_mii_speed = fep->phy_speed = 0;
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#ifdef FREC_LEGACY
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fec_disable_phy_intr();
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#endif
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}
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}
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@ -2101,12 +2111,12 @@ fec_set_mac_address(struct net_device *dev)
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}
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/* Initialize the FEC Ethernet on 860T (or ColdFire 5272).
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*/
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/*
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* XXX: We need to clean up on failure exits here.
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*
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* index is only used in legacy code
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*/
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int __init fec_enet_init(struct net_device *dev)
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int __init fec_enet_init(struct net_device *dev, int index)
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{
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struct fec_enet_private *fep = netdev_priv(dev);
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unsigned long mem_addr;
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@ -2114,11 +2124,6 @@ int __init fec_enet_init(struct net_device *dev)
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cbd_t *cbd_base;
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volatile fec_t *fecp;
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int i, j;
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static int index = 0;
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/* Only allow us to be probed once. */
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if (index >= FEC_MAX_PORTS)
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return -ENXIO;
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/* Allocate memory for buffer descriptors.
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*/
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@ -2134,7 +2139,7 @@ int __init fec_enet_init(struct net_device *dev)
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/* Create an Ethernet device instance.
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*/
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fecp = (volatile fec_t *) fec_hw[index];
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fecp = (volatile fec_t *)dev->base_addr;
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fep->index = index;
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fep->hwp = fecp;
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@ -2145,16 +2150,24 @@ int __init fec_enet_init(struct net_device *dev)
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fecp->fec_ecntrl = 1;
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udelay(10);
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/* Set the Ethernet address. If using multiple Enets on the 8xx,
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* this needs some work to get unique addresses.
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*
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* This is our default MAC address unless the user changes
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* it via eth_mac_addr (our dev->set_mac_addr handler).
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*/
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/* Set the Ethernet address */
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#ifdef FEC_LEGACY
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fec_get_mac(dev);
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#else
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{
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unsigned long l;
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l = fecp->fec_addr_low;
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dev->dev_addr[0] = (unsigned char)((l & 0xFF000000) >> 24);
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dev->dev_addr[1] = (unsigned char)((l & 0x00FF0000) >> 16);
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dev->dev_addr[2] = (unsigned char)((l & 0x0000FF00) >> 8);
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dev->dev_addr[3] = (unsigned char)((l & 0x000000FF) >> 0);
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l = fecp->fec_addr_high;
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dev->dev_addr[4] = (unsigned char)((l & 0xFF000000) >> 24);
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dev->dev_addr[5] = (unsigned char)((l & 0x00FF0000) >> 16);
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}
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#endif
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cbd_base = (cbd_t *)mem_addr;
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/* XXX: missing check for allocation failure */
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/* Set receive and transmit descriptor base.
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*/
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@ -2222,10 +2235,12 @@ int __init fec_enet_init(struct net_device *dev)
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fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t)
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* RX_RING_SIZE;
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#ifdef FEC_LEGACY
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/* Install our interrupt handlers. This varies depending on
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* the architecture.
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*/
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fec_request_intrs(dev);
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#endif
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fecp->fec_grp_hash_table_high = 0;
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fecp->fec_grp_hash_table_low = 0;
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@ -2237,8 +2252,6 @@ int __init fec_enet_init(struct net_device *dev)
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fecp->fec_hash_table_low = 0;
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#endif
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dev->base_addr = (unsigned long)fecp;
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/* The FEC Ethernet specific entries in the device structure. */
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dev->open = fec_enet_open;
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dev->hard_start_xmit = fec_enet_start_xmit;
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@ -2252,7 +2265,20 @@ int __init fec_enet_init(struct net_device *dev)
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mii_free = mii_cmds;
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/* setup MII interface */
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#ifdef FEC_LEGACY
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fec_set_mii(dev, fep);
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#else
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fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04;
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fecp->fec_x_cntrl = 0x00;
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/*
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* Set MII speed to 2.5 MHz
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*/
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fep->phy_speed = ((((clk_get_rate(fep->clk) / 2 + 4999999)
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/ 2500000) / 2) & 0x3F) << 1;
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fecp->fec_mii_speed = fep->phy_speed;
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fec_restart(dev, 0);
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#endif
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/* Clear and enable interrupts */
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fecp->fec_ievent = 0xffc00000;
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@ -2265,7 +2291,6 @@ int __init fec_enet_init(struct net_device *dev)
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fep->phy_addr = 0;
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mii_queue(dev, mk_mii_read(MII_REG_PHYIR1), mii_discover_phy);
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index++;
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return 0;
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}
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@ -2417,6 +2442,7 @@ fec_stop(struct net_device *dev)
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fecp->fec_mii_speed = fep->phy_speed;
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}
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#ifdef FEC_LEGACY
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static int __init fec_enet_module_init(void)
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{
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struct net_device *dev;
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@ -2428,7 +2454,8 @@ static int __init fec_enet_module_init(void)
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dev = alloc_etherdev(sizeof(struct fec_enet_private));
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if (!dev)
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return -ENOMEM;
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err = fec_enet_init(dev);
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dev->base_addr = (unsigned long)fec_hw[i];
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err = fec_enet_init(dev, i);
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if (err) {
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free_netdev(dev);
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continue;
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@ -2443,6 +2470,170 @@ static int __init fec_enet_module_init(void)
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}
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return 0;
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}
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#else
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static int __devinit
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fec_probe(struct platform_device *pdev)
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{
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struct fec_enet_private *fep;
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struct net_device *ndev;
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int i, irq, ret = 0;
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struct resource *r;
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!r)
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return -ENXIO;
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r = request_mem_region(r->start, resource_size(r), pdev->name);
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if (!r)
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return -EBUSY;
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/* Init network device */
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ndev = alloc_etherdev(sizeof(struct fec_enet_private));
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if (!ndev)
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return -ENOMEM;
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SET_NETDEV_DEV(ndev, &pdev->dev);
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/* setup board info structure */
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fep = netdev_priv(ndev);
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memset(fep, 0, sizeof(*fep));
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ndev->base_addr = (unsigned long)ioremap(r->start, resource_size(r));
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if (!ndev->base_addr) {
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ret = -ENOMEM;
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goto failed_ioremap;
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}
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platform_set_drvdata(pdev, ndev);
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/* This device has up to three irqs on some platforms */
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for (i = 0; i < 3; i++) {
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irq = platform_get_irq(pdev, i);
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if (i && irq < 0)
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break;
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ret = request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev);
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if (ret) {
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while (i >= 0) {
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irq = platform_get_irq(pdev, i);
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free_irq(irq, ndev);
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i--;
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}
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goto failed_irq;
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}
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}
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fep->clk = clk_get(&pdev->dev, "fec_clk");
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if (IS_ERR(fep->clk)) {
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ret = PTR_ERR(fep->clk);
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goto failed_clk;
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}
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clk_enable(fep->clk);
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ret = fec_enet_init(ndev, 0);
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if (ret)
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goto failed_init;
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ret = register_netdev(ndev);
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if (ret)
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goto failed_register;
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return 0;
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failed_register:
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failed_init:
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clk_disable(fep->clk);
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clk_put(fep->clk);
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failed_clk:
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for (i = 0; i < 3; i++) {
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irq = platform_get_irq(pdev, i);
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if (irq > 0)
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free_irq(irq, ndev);
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}
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failed_irq:
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iounmap((void __iomem *)ndev->base_addr);
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failed_ioremap:
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free_netdev(ndev);
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return ret;
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}
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static int __devexit
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fec_drv_remove(struct platform_device *pdev)
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{
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struct net_device *ndev = platform_get_drvdata(pdev);
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struct fec_enet_private *fep = netdev_priv(ndev);
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platform_set_drvdata(pdev, NULL);
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fec_stop(ndev);
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clk_disable(fep->clk);
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clk_put(fep->clk);
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iounmap((void __iomem *)ndev->base_addr);
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unregister_netdev(ndev);
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free_netdev(ndev);
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return 0;
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}
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static int
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fec_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct net_device *ndev = platform_get_drvdata(dev);
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struct fec_enet_private *fep;
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if (ndev) {
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fep = netdev_priv(ndev);
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if (netif_running(ndev)) {
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netif_device_detach(ndev);
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fec_stop(ndev);
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}
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}
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return 0;
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}
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static int
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fec_resume(struct platform_device *dev)
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{
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struct net_device *ndev = platform_get_drvdata(dev);
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if (ndev) {
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if (netif_running(ndev)) {
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fec_enet_init(ndev, 0);
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netif_device_attach(ndev);
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}
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}
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return 0;
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}
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static struct platform_driver fec_driver = {
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.driver = {
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.name = "fec",
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.owner = THIS_MODULE,
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},
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.probe = fec_probe,
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.remove = __devexit_p(fec_drv_remove),
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.suspend = fec_suspend,
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.resume = fec_resume,
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};
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static int __init
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fec_enet_module_init(void)
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{
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printk(KERN_INFO "FEC Ethernet Driver\n");
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return platform_driver_register(&fec_driver);
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}
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static void __exit
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fec_enet_cleanup(void)
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{
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platform_driver_unregister(&fec_driver);
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}
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module_exit(fec_enet_cleanup);
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#endif /* FEC_LEGACY */
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module_init(fec_enet_module_init);
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