1 files changed, 498 insertions, 0 deletions

diff --git a/drivers/net/fs_enet/mac-fec.c b/drivers/net/fs_enet/mac-fec.c
new file mode 100644
index 00000000000..b9fbc83d64a
--- /dev/null
+++ b/drivers/net/fs_enet/mac-fec.c
@@ -0,0 +1,498 @@
+/*
+ * Freescale Ethernet controllers
+ *
+ * Copyright (c) 2005 Intracom S.A.
+ *  by Pantelis Antoniou <panto@intracom.gr>
+ *
+ * 2005 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/bitops.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/gfp.h>
+
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#ifdef CONFIG_8xx
+#include <asm/8xx_immap.h>
+#include <asm/pgtable.h>
+#include <asm/mpc8xx.h>
+#include <asm/cpm1.h>
+#endif
+
+#include "fs_enet.h"
+#include "fec.h"
+
+/*************************************************/
+
+#if defined(CONFIG_CPM1)
+/* for a CPM1 __raw_xxx's are sufficient */
+#define __fs_out32(addr, x)     __raw_writel(x, addr)
+#define __fs_out16(addr, x)     __raw_writew(x, addr)
+#define __fs_in32(addr) __raw_readl(addr)
+#define __fs_in16(addr) __raw_readw(addr)
+#else
+/* for others play it safe */
+#define __fs_out32(addr, x)     out_be32(addr, x)
+#define __fs_out16(addr, x)     out_be16(addr, x)
+#define __fs_in32(addr) in_be32(addr)
+#define __fs_in16(addr) in_be16(addr)
+#endif
+
+/* write */
+#define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
+
+/* read */
+#define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
+
+/* set bits */
+#define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
+
+/* clear bits */
+#define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
+
+/*
+ * Delay to wait for FEC reset command to complete (in us)
+ */
+#define FEC_RESET_DELAY         50
+
+static int whack_reset(struct fec __iomem *fecp)
+{
+        int i;
+
+        FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
+        for (i = 0; i < FEC_RESET_DELAY; i++) {
+                if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
+                        return 0;       /* OK */
+                udelay(1);
+        }
+
+        return -1;
+}
+
+static int do_pd_setup(struct fs_enet_private *fep)
+{
+        struct platform_device *ofdev = to_platform_device(fep->dev);
+
+        fep->interrupt = of_irq_to_resource(ofdev->dev.of_node, 0, NULL);
+        if (fep->interrupt == NO_IRQ)
+                return -EINVAL;
+
+        fep->fec.fecp = of_iomap(ofdev->dev.of_node, 0);
+        if (!fep->fcc.fccp)
+                return -EINVAL;
+
+        return 0;
+}
+
+#define FEC_NAPI_RX_EVENT_MSK   (FEC_ENET_RXF | FEC_ENET_RXB)
+#define FEC_RX_EVENT            (FEC_ENET_RXF)
+#define FEC_TX_EVENT            (FEC_ENET_TXF)
+#define FEC_ERR_EVENT_MSK       (FEC_ENET_HBERR | FEC_ENET_BABR | \
+                                 FEC_ENET_BABT | FEC_ENET_EBERR)
+
+static int setup_data(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+
+        if (do_pd_setup(fep) != 0)
+                return -EINVAL;
+
+        fep->fec.hthi = 0;
+        fep->fec.htlo = 0;
+
+        fep->ev_napi_rx = FEC_NAPI_RX_EVENT_MSK;
+        fep->ev_rx = FEC_RX_EVENT;
+        fep->ev_tx = FEC_TX_EVENT;
+        fep->ev_err = FEC_ERR_EVENT_MSK;
+
+        return 0;
+}
+
+static int allocate_bd(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        const struct fs_platform_info *fpi = fep->fpi;
+
+        fep->ring_base = (void __force __iomem *)dma_alloc_coherent(fep->dev,
+                                            (fpi->tx_ring + fpi->rx_ring) *
+                                            sizeof(cbd_t), &fep->ring_mem_addr,
+                                            GFP_KERNEL);
+        if (fep->ring_base == NULL)
+                return -ENOMEM;
+
+        return 0;
+}
+
+static void free_bd(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        const struct fs_platform_info *fpi = fep->fpi;
+
+        if(fep->ring_base)
+                dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
+                                        * sizeof(cbd_t),
+                                        (void __force *)fep->ring_base,
+                                        fep->ring_mem_addr);
+}
+
+static void cleanup_data(struct net_device *dev)
+{
+        /* nothing */
+}
+
+static void set_promiscuous_mode(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
+}
+
+static void set_multicast_start(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+
+        fep->fec.hthi = 0;
+        fep->fec.htlo = 0;
+}
+
+static void set_multicast_one(struct net_device *dev, const u8 *mac)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        int temp, hash_index, i, j;
+        u32 crc, csrVal;
+        u8 byte, msb;
+
+        crc = 0xffffffff;
+        for (i = 0; i < 6; i++) {
+                byte = mac[i];
+                for (j = 0; j < 8; j++) {
+                        msb = crc >> 31;
+                        crc <<= 1;
+                        if (msb ^ (byte & 0x1))
+                                crc ^= FEC_CRC_POLY;
+                        byte >>= 1;
+                }
+        }
+
+        temp = (crc & 0x3f) >> 1;
+        hash_index = ((temp & 0x01) << 4) |
+                     ((temp & 0x02) << 2) |
+                     ((temp & 0x04)) |
+                     ((temp & 0x08) >> 2) |
+                     ((temp & 0x10) >> 4);
+        csrVal = 1 << hash_index;
+        if (crc & 1)
+                fep->fec.hthi |= csrVal;
+        else
+                fep->fec.htlo |= csrVal;
+}
+
+static void set_multicast_finish(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        /* if all multi or too many multicasts; just enable all */
+        if ((dev->flags & IFF_ALLMULTI) != 0 ||
+            netdev_mc_count(dev) > FEC_MAX_MULTICAST_ADDRS) {
+                fep->fec.hthi = 0xffffffffU;
+                fep->fec.htlo = 0xffffffffU;
+        }
+
+        FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
+        FW(fecp, grp_hash_table_high, fep->fec.hthi);
+        FW(fecp, grp_hash_table_low, fep->fec.htlo);
+}
+
+static void set_multicast_list(struct net_device *dev)
+{
+        struct netdev_hw_addr *ha;
+
+        if ((dev->flags & IFF_PROMISC) == 0) {
+                set_multicast_start(dev);
+                netdev_for_each_mc_addr(ha, dev)
+                        set_multicast_one(dev, ha->addr);
+                set_multicast_finish(dev);
+        } else
+                set_promiscuous_mode(dev);
+}
+
+static void restart(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+        const struct fs_platform_info *fpi = fep->fpi;
+        dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
+        int r;
+        u32 addrhi, addrlo;
+
+        struct mii_bus* mii = fep->phydev->bus;
+        struct fec_info* fec_inf = mii->priv;
+
+        r = whack_reset(fep->fec.fecp);
+        if (r != 0)
+                dev_err(fep->dev, "FEC Reset FAILED!\n");
+        /*
+         * Set station address.
+         */
+        addrhi = ((u32) dev->dev_addr[0] << 24) |
+                 ((u32) dev->dev_addr[1] << 16) |
+                 ((u32) dev->dev_addr[2] <<  8) |
+                  (u32) dev->dev_addr[3];
+        addrlo = ((u32) dev->dev_addr[4] << 24) |
+                 ((u32) dev->dev_addr[5] << 16);
+        FW(fecp, addr_low, addrhi);
+        FW(fecp, addr_high, addrlo);
+
+        /*
+         * Reset all multicast.
+         */
+        FW(fecp, grp_hash_table_high, fep->fec.hthi);
+        FW(fecp, grp_hash_table_low, fep->fec.htlo);
+
+        /*
+         * Set maximum receive buffer size.
+         */
+        FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
+#ifdef CONFIG_FS_ENET_MPC5121_FEC
+        FW(fecp, r_cntrl, PKT_MAXBUF_SIZE << 16);
+#else
+        FW(fecp, r_hash, PKT_MAXBUF_SIZE);
+#endif
+
+        /* get physical address */
+        rx_bd_base_phys = fep->ring_mem_addr;
+        tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
+
+        /*
+         * Set receive and transmit descriptor base.
+         */
+        FW(fecp, r_des_start, rx_bd_base_phys);
+        FW(fecp, x_des_start, tx_bd_base_phys);
+
+        fs_init_bds(dev);
+
+        /*
+         * Enable big endian and don't care about SDMA FC.
+         */
+#ifdef CONFIG_FS_ENET_MPC5121_FEC
+        FS(fecp, dma_control, 0xC0000000);
+#else
+        FW(fecp, fun_code, 0x78000000);
+#endif
+
+        /*
+         * Set MII speed.
+         */
+        FW(fecp, mii_speed, fec_inf->mii_speed);
+
+        /*
+         * Clear any outstanding interrupt.
+         */
+        FW(fecp, ievent, 0xffc0);
+#ifndef CONFIG_FS_ENET_MPC5121_FEC
+        FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
+
+        FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
+#else
+        /*
+         * Only set MII mode - do not touch maximum frame length
+         * configured before.
+         */
+        FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE);
+#endif
+        /*
+         * adjust to duplex mode
+         */
+        if (fep->phydev->duplex) {
+                FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
+                FS(fecp, x_cntrl, FEC_TCNTRL_FDEN);     /* FD enable */
+        } else {
+                FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
+                FC(fecp, x_cntrl, FEC_TCNTRL_FDEN);     /* FD disable */
+        }
+
+        /*
+         * Enable interrupts we wish to service.
+         */
+        FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
+           FEC_ENET_RXF | FEC_ENET_RXB);
+
+        /*
+         * And last, enable the transmit and receive processing.
+         */
+        FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
+        FW(fecp, r_des_active, 0x01000000);
+}
+
+static void stop(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        const struct fs_platform_info *fpi = fep->fpi;
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        struct fec_info* feci= fep->phydev->bus->priv;
+
+        int i;
+
+        if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
+                return;         /* already down */
+
+        FW(fecp, x_cntrl, 0x01);        /* Graceful transmit stop */
+        for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
+             i < FEC_RESET_DELAY; i++)
+                udelay(1);
+
+        if (i == FEC_RESET_DELAY)
+                dev_warn(fep->dev, "FEC timeout on graceful transmit stop\n");
+        /*
+         * Disable FEC. Let only MII interrupts.
+         */
+        FW(fecp, imask, 0);
+        FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
+
+        fs_cleanup_bds(dev);
+
+        /* shut down FEC1? that's where the mii bus is */
+        if (fpi->has_phy) {
+                FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
+                FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
+                FW(fecp, ievent, FEC_ENET_MII);
+                FW(fecp, mii_speed, feci->mii_speed);
+        }
+}
+
+static void napi_clear_rx_event(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        FW(fecp, ievent, FEC_NAPI_RX_EVENT_MSK);
+}
+
+static void napi_enable_rx(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        FS(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
+}
+
+static void napi_disable_rx(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        FC(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
+}
+
+static void rx_bd_done(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        FW(fecp, r_des_active, 0x01000000);
+}
+
+static void tx_kickstart(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        FW(fecp, x_des_active, 0x01000000);
+}
+
+static u32 get_int_events(struct net_device *dev)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        return FR(fecp, ievent) & FR(fecp, imask);
+}
+
+static void clear_int_events(struct net_device *dev, u32 int_events)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+        struct fec __iomem *fecp = fep->fec.fecp;
+
+        FW(fecp, ievent, int_events);
+}
+
+static void ev_error(struct net_device *dev, u32 int_events)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+
+        dev_warn(fep->dev, "FEC ERROR(s) 0x%x\n", int_events);
+}
+
+static int get_regs(struct net_device *dev, void *p, int *sizep)
+{
+        struct fs_enet_private *fep = netdev_priv(dev);
+
+        if (*sizep < sizeof(struct fec))
+                return -EINVAL;
+
+        memcpy_fromio(p, fep->fec.fecp, sizeof(struct fec));
+
+        return 0;
+}
+
+static int get_regs_len(struct net_device *dev)
+{
+        return sizeof(struct fec);
+}
+
+static void tx_restart(struct net_device *dev)
+{
+        /* nothing */
+}
+
+/*************************************************************************/
+
+const struct fs_ops fs_fec_ops = {
+        .setup_data             = setup_data,
+        .cleanup_data           = cleanup_data,
+        .set_multicast_list     = set_multicast_list,
+        .restart                = restart,
+        .stop                   = stop,
+        .napi_clear_rx_event    = napi_clear_rx_event,
+        .napi_enable_rx         = napi_enable_rx,
+        .napi_disable_rx        = napi_disable_rx,
+        .rx_bd_done             = rx_bd_done,
+        .tx_kickstart           = tx_kickstart,
+        .get_int_events         = get_int_events,
+        .clear_int_events       = clear_int_events,
+        .ev_error               = ev_error,
+        .get_regs               = get_regs,
+        .get_regs_len           = get_regs_len,
+        .tx_restart             = tx_restart,
+        .allocate_bd            = allocate_bd,
+        .free_bd                = free_bd,
+};
+