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|
/*
* Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
*
* Copyright (c) 2003 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/sched.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.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 <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/commproc.h>
#endif
#include "fs_enet.h"
/*************************************************/
#if defined(CONFIG_CPM1)
/* for a 8xx __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_out8(addr, x) __raw_writeb(x, addr)
#define __fs_in32(addr) __raw_readl(addr)
#define __fs_in16(addr) __raw_readw(addr)
#define __fs_in8(addr) __raw_readb(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, read, set bits, clear bits */
#define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
#define R32(_p, _m) __fs_in32(&(_p)->_m)
#define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
#define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
#define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
#define R16(_p, _m) __fs_in16(&(_p)->_m)
#define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
#define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
#define W8(_p, _m, _v) __fs_out8(&(_p)->_m, (_v))
#define R8(_p, _m) __fs_in8(&(_p)->_m)
#define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) | (_v))
#define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))
#define SCC_MAX_MULTICAST_ADDRS 64
/*
* Delay to wait for SCC reset command to complete (in us)
*/
#define SCC_RESET_DELAY 50
#define MAX_CR_CMD_LOOPS 10000
static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
{
cpm8xx_t *cpmp = &((immap_t *)fs_enet_immap)->im_cpm;
u32 v, ch;
int i = 0;
ch = fep->scc.idx << 2;
v = mk_cr_cmd(ch, op);
W16(cpmp, cp_cpcr, v | CPM_CR_FLG);
for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
if ((R16(cpmp, cp_cpcr) & CPM_CR_FLG) == 0)
break;
if (i >= MAX_CR_CMD_LOOPS) {
printk(KERN_ERR "%s(): Not able to issue CPM command\n",
__FUNCTION__);
return 1;
}
return 0;
}
static int do_pd_setup(struct fs_enet_private *fep)
{
struct platform_device *pdev = to_platform_device(fep->dev);
struct resource *r;
/* Fill out IRQ field */
fep->interrupt = platform_get_irq_byname(pdev, "interrupt");
if (fep->interrupt < 0)
return -EINVAL;
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
fep->scc.sccp = ioremap(r->start, r->end - r->start + 1);
if (fep->scc.sccp == NULL)
return -EINVAL;
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pram");
fep->scc.ep = ioremap(r->start, r->end - r->start + 1);
if (fep->scc.ep == NULL)
return -EINVAL;
return 0;
}
#define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF | SCCE_ENET_RXB)
#define SCC_RX_EVENT (SCCE_ENET_RXF)
#define SCC_TX_EVENT (SCCE_ENET_TXB)
#define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE | SCCE_ENET_BSY)
static int setup_data(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
const struct fs_platform_info *fpi = fep->fpi;
fep->scc.idx = fs_get_scc_index(fpi->fs_no);
if ((unsigned int)fep->fcc.idx > 4) /* max 4 SCCs */
return -EINVAL;
do_pd_setup(fep);
fep->scc.hthi = 0;
fep->scc.htlo = 0;
fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK;
fep->ev_rx = SCC_RX_EVENT;
fep->ev_tx = SCC_TX_EVENT;
fep->ev_err = SCC_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_mem_addr = cpm_dpalloc((fpi->tx_ring + fpi->rx_ring) *
sizeof(cbd_t), 8);
if (IS_DPERR(fep->ring_mem_addr))
return -ENOMEM;
fep->ring_base = cpm_dpram_addr(fep->ring_mem_addr);
return 0;
}
static void free_bd(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->ring_base)
cpm_dpfree(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);
scc_t *sccp = fep->scc.sccp;
S16(sccp, scc_psmr, SCC_PSMR_PRO);
}
static void set_multicast_start(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_enet_t *ep = fep->scc.ep;
W16(ep, sen_gaddr1, 0);
W16(ep, sen_gaddr2, 0);
W16(ep, sen_gaddr3, 0);
W16(ep, sen_gaddr4, 0);
}
static void set_multicast_one(struct net_device *dev, const u8 * mac)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_enet_t *ep = fep->scc.ep;
u16 taddrh, taddrm, taddrl;
taddrh = ((u16) mac[5] << 8) | mac[4];
taddrm = ((u16) mac[3] << 8) | mac[2];
taddrl = ((u16) mac[1] << 8) | mac[0];
W16(ep, sen_taddrh, taddrh);
W16(ep, sen_taddrm, taddrm);
W16(ep, sen_taddrl, taddrl);
scc_cr_cmd(fep, CPM_CR_SET_GADDR);
}
static void set_multicast_finish(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t *sccp = fep->scc.sccp;
scc_enet_t *ep = fep->scc.ep;
/* clear promiscuous always */
C16(sccp, scc_psmr, SCC_PSMR_PRO);
/* if all multi or too many multicasts; just enable all */
if ((dev->flags & IFF_ALLMULTI) != 0 ||
dev->mc_count > SCC_MAX_MULTICAST_ADDRS) {
W16(ep, sen_gaddr1, 0xffff);
W16(ep, sen_gaddr2, 0xffff);
W16(ep, sen_gaddr3, 0xffff);
W16(ep, sen_gaddr4, 0xffff);
}
}
static void set_multicast_list(struct net_device *dev)
{
struct dev_mc_list *pmc;
if ((dev->flags & IFF_PROMISC) == 0) {
set_multicast_start(dev);
for (pmc =
|