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linux/drivers/net/fs_enet/mac-scc.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h 
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

530 lines
13 KiB
C
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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/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 = dev->mc_list; pmc != NULL; pmc = pmc->next)
set_multicast_one(dev, pmc->dmi_addr);
set_multicast_finish(dev);
} else
set_promiscuous_mode(dev);
}
/*
* This function is called to start or restart the FEC during a link
* change. This only happens when switching between half and full
* duplex.
*/
static void restart(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;
const struct fs_platform_info *fpi = fep->fpi;
u16 paddrh, paddrm, paddrl;
const unsigned char *mac;
int i;
C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
/* clear everything (slow & steady does it) */
for (i = 0; i < sizeof(*ep); i++)
__fs_out8((char *)ep + i, 0);
/* point to bds */
W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr);
W16(ep, sen_genscc.scc_tbase,
fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring);
/* Initialize function code registers for big-endian.
*/
W8(ep, sen_genscc.scc_rfcr, SCC_EB);
W8(ep, sen_genscc.scc_tfcr, SCC_EB);
/* Set maximum bytes per receive buffer.
* This appears to be an Ethernet frame size, not the buffer
* fragment size. It must be a multiple of four.
*/
W16(ep, sen_genscc.scc_mrblr, 0x5f0);
/* Set CRC preset and mask.
*/
W32(ep, sen_cpres, 0xffffffff);
W32(ep, sen_cmask, 0xdebb20e3);
W32(ep, sen_crcec, 0); /* CRC Error counter */
W32(ep, sen_alec, 0); /* alignment error counter */
W32(ep, sen_disfc, 0); /* discard frame counter */
W16(ep, sen_pads, 0x8888); /* Tx short frame pad character */
W16(ep, sen_retlim, 15); /* Retry limit threshold */
W16(ep, sen_maxflr, 0x5ee); /* maximum frame length register */
W16(ep, sen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */
W16(ep, sen_maxd1, 0x000005f0); /* maximum DMA1 length */
W16(ep, sen_maxd2, 0x000005f0); /* maximum DMA2 length */
/* Clear hash tables.
*/
W16(ep, sen_gaddr1, 0);
W16(ep, sen_gaddr2, 0);
W16(ep, sen_gaddr3, 0);
W16(ep, sen_gaddr4, 0);
W16(ep, sen_iaddr1, 0);
W16(ep, sen_iaddr2, 0);
W16(ep, sen_iaddr3, 0);
W16(ep, sen_iaddr4, 0);
/* set address
*/
mac = dev->dev_addr;
paddrh = ((u16) mac[5] << 8) | mac[4];
paddrm = ((u16) mac[3] << 8) | mac[2];
paddrl = ((u16) mac[1] << 8) | mac[0];
W16(ep, sen_paddrh, paddrh);
W16(ep, sen_paddrm, paddrm);
W16(ep, sen_paddrl, paddrl);
W16(ep, sen_pper, 0);
W16(ep, sen_taddrl, 0);
W16(ep, sen_taddrm, 0);
W16(ep, sen_taddrh, 0);
fs_init_bds(dev);
scc_cr_cmd(fep, CPM_CR_INIT_TRX);
W16(sccp, scc_scce, 0xffff);
/* Enable interrupts we wish to service.
*/
W16(sccp, scc_sccm, SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
/* Set GSMR_H to enable all normal operating modes.
* Set GSMR_L to enable Ethernet to MC68160.
*/
W32(sccp, scc_gsmrh, 0);
W32(sccp, scc_gsmrl,
SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 |
SCC_GSMRL_MODE_ENET);
/* Set sync/delimiters.
*/
W16(sccp, scc_dsr, 0xd555);
/* Set processing mode. Use Ethernet CRC, catch broadcast, and
* start frame search 22 bit times after RENA.
*/
W16(sccp, scc_psmr, SCC_PSMR_ENCRC | SCC_PSMR_NIB22);
/* Set full duplex mode if needed */
if (fep->phydev->duplex)
S16(sccp, scc_psmr, SCC_PSMR_LPB | SCC_PSMR_FDE);
S32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
}
static void stop(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t *sccp = fep->scc.sccp;
int i;
for (i = 0; (R16(sccp, scc_sccm) == 0) && i < SCC_RESET_DELAY; i++)
udelay(1);
if (i == SCC_RESET_DELAY)
printk(KERN_WARNING DRV_MODULE_NAME
": %s SCC timeout on graceful transmit stop\n",
dev->name);
W16(sccp, scc_sccm, 0);
C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
fs_cleanup_bds(dev);
}
static void pre_request_irq(struct net_device *dev, int irq)
{
#ifndef CONFIG_PPC_MERGE
immap_t *immap = fs_enet_immap;
u32 siel;
/* SIU interrupt */
if (irq >= SIU_IRQ0 && irq < SIU_LEVEL7) {
siel = in_be32(&immap->im_siu_conf.sc_siel);
if ((irq & 1) == 0)
siel |= (0x80000000 >> irq);
else
siel &= ~(0x80000000 >> (irq & ~1));
out_be32(&immap->im_siu_conf.sc_siel, siel);
}
#endif
}
static void post_free_irq(struct net_device *dev, int irq)
{
/* nothing */
}
static void napi_clear_rx_event(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t *sccp = fep->scc.sccp;
W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK);
}
static void napi_enable_rx(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t *sccp = fep->scc.sccp;
S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
}
static void napi_disable_rx(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t *sccp = fep->scc.sccp;
C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
}
static void rx_bd_done(struct net_device *dev)
{
/* nothing */
}
static void tx_kickstart(struct net_device *dev)
{
/* nothing */
}
static u32 get_int_events(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t *sccp = fep->scc.sccp;
return (u32) R16(sccp, scc_scce);
}
static void clear_int_events(struct net_device *dev, u32 int_events)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_t *sccp = fep->scc.sccp;
W16(sccp, scc_scce, int_events & 0xffff);
}
static void ev_error(struct net_device *dev, u32 int_events)
{
printk(KERN_WARNING DRV_MODULE_NAME
": %s SCC ERROR(s) 0x%x\n", dev->name, 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(scc_t) + sizeof(scc_enet_t))
return -EINVAL;
memcpy_fromio(p, fep->scc.sccp, sizeof(scc_t));
p = (char *)p + sizeof(scc_t);
memcpy_fromio(p, fep->scc.ep, sizeof(scc_enet_t));
return 0;
}
static int get_regs_len(struct net_device *dev)
{
return sizeof(scc_t) + sizeof(scc_enet_t);
}
static void tx_restart(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
scc_cr_cmd(fep, CPM_CR_RESTART_TX);
}
/*************************************************************************/
const struct fs_ops fs_scc_ops = {
.setup_data = setup_data,
.cleanup_data = cleanup_data,
.set_multicast_list = set_multicast_list,
.restart = restart,
.stop = stop,
.pre_request_irq = pre_request_irq,
.post_free_irq = post_free_irq,
.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,
};
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