[net-next-2.6.git] / drivers / net / fs_enet / mac-scc.c

/*
 * 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/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,
};
Commit	Line	Data
48257c4f PA	1	/*
	2	* Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
	3	*
	4	* Copyright (c) 2003 Intracom S.A.
	5	* by Pantelis Antoniou <panto@intracom.gr>
	6	*
	7	* 2005 (c) MontaVista Software, Inc.
	8	* Vitaly Bordug <vbordug@ru.mvista.com>
	9	*
	10	* This file is licensed under the terms of the GNU General Public License
	11	* version 2. This program is licensed "as is" without any warranty of any
	12	* kind, whether express or implied.
	13	*/
	14
48257c4f PA	15	#include <linux/module.h>
	16	#include <linux/kernel.h>
	17	#include <linux/types.h>
48257c4f PA	18	#include <linux/string.h>
	19	#include <linux/ptrace.h>
	20	#include <linux/errno.h>
	21	#include <linux/ioport.h>
	22	#include <linux/slab.h>
	23	#include <linux/interrupt.h>
48257c4f PA	24	#include <linux/init.h>
	25	#include <linux/delay.h>
	26	#include <linux/netdevice.h>
	27	#include <linux/etherdevice.h>
	28	#include <linux/skbuff.h>
	29	#include <linux/spinlock.h>
	30	#include <linux/mii.h>
	31	#include <linux/ethtool.h>
	32	#include <linux/bitops.h>
	33	#include <linux/fs.h>
f7b99969	34	#include <linux/platform_device.h>
48257c4f PA	35
	36	#include <asm/irq.h>
	37	#include <asm/uaccess.h>
	38
	39	#ifdef CONFIG_8xx
	40	#include <asm/8xx_immap.h>
	41	#include <asm/pgtable.h>
	42	#include <asm/mpc8xx.h>
	43	#include <asm/commproc.h>
	44	#endif
	45
	46	#include "fs_enet.h"
	47
	48	/*************************************************/
	49
	50	#if defined(CONFIG_CPM1)
	51	/* for a 8xx __raw_xxx's are sufficient */
	52	#define __fs_out32(addr, x) __raw_writel(x, addr)
	53	#define __fs_out16(addr, x) __raw_writew(x, addr)
	54	#define __fs_out8(addr, x) __raw_writeb(x, addr)
	55	#define __fs_in32(addr) __raw_readl(addr)
	56	#define __fs_in16(addr) __raw_readw(addr)
	57	#define __fs_in8(addr) __raw_readb(addr)
	58	#else
	59	/* for others play it safe */
	60	#define __fs_out32(addr, x) out_be32(addr, x)
	61	#define __fs_out16(addr, x) out_be16(addr, x)
	62	#define __fs_in32(addr) in_be32(addr)
	63	#define __fs_in16(addr) in_be16(addr)
	64	#endif
	65
	66	/* write, read, set bits, clear bits */
	67	#define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
	68	#define R32(_p, _m) __fs_in32(&(_p)->_m)
	69	#define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) \| (_v))
	70	#define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
	71
	72	#define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
	73	#define R16(_p, _m) __fs_in16(&(_p)->_m)
	74	#define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) \| (_v))
	75	#define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
	76
	77	#define W8(_p, _m, _v) __fs_out8(&(_p)->_m, (_v))
	78	#define R8(_p, _m) __fs_in8(&(_p)->_m)
	79	#define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) \| (_v))
	80	#define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))
	81
	82	#define SCC_MAX_MULTICAST_ADDRS 64
	83
	84	/*
	85	* Delay to wait for SCC reset command to complete (in us)
	86	*/
	87	#define SCC_RESET_DELAY 50
	88	#define MAX_CR_CMD_LOOPS 10000
	89
	90	static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
	91	{
	92	cpm8xx_t cpmp = &((immap_t )fs_enet_immap)->im_cpm;
	93	u32 v, ch;
	94	int i = 0;
	95
	96	ch = fep->scc.idx << 2;
	97	v = mk_cr_cmd(ch, op);
	98	W16(cpmp, cp_cpcr, v \| CPM_CR_FLG);
99	for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
100	if ((R16(cpmp, cp_cpcr) & CPM_CR_FLG) == 0)
101	break;
102
103	if (i >= MAX_CR_CMD_LOOPS) {
104	printk(KERN_ERR "%s(): Not able to issue CPM command\n",
105	__FUNCTION__);
106	return 1;
107	}
108	return 0;
109	}
110
111	static int do_pd_setup(struct fs_enet_private *fep)
112	{
113	struct platform_device *pdev = to_platform_device(fep->dev);
114	struct resource *r;
115
116	/* Fill out IRQ field */
117	fep->interrupt = platform_get_irq_byname(pdev, "interrupt");
48944738 DV	118	if (fep->interrupt < 0)
48944738 DV	119	return -EINVAL;
48257c4f PA	120
48257c4f PA	121	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
b1f54ba3	122	fep->scc.sccp = ioremap(r->start, r->end - r->start + 1);
48257c4f PA	123
	124	if (fep->scc.sccp == NULL)
	125	return -EINVAL;
	126
	127	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pram");
b1f54ba3	128	fep->scc.ep = ioremap(r->start, r->end - r->start + 1);
48257c4f PA	129
	130	if (fep->scc.ep == NULL)
	131	return -EINVAL;
	132
	133	return 0;
	134	}
	135
	136	#define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF \| SCCE_ENET_RXB)
	137	#define SCC_RX_EVENT (SCCE_ENET_RXF)
	138	#define SCC_TX_EVENT (SCCE_ENET_TXB)
	139	#define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE \| SCCE_ENET_BSY)
	140
	141	static int setup_data(struct net_device *dev)
	142	{
	143	struct fs_enet_private *fep = netdev_priv(dev);
	144	const struct fs_platform_info *fpi = fep->fpi;
	145
	146	fep->scc.idx = fs_get_scc_index(fpi->fs_no);
	147	if ((unsigned int)fep->fcc.idx > 4) /* max 4 SCCs */
	148	return -EINVAL;
	149
	150	do_pd_setup(fep);
	151
	152	fep->scc.hthi = 0;
	153	fep->scc.htlo = 0;
	154
	155	fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK;
	156	fep->ev_rx = SCC_RX_EVENT;
	157	fep->ev_tx = SCC_TX_EVENT;
	158	fep->ev_err = SCC_ERR_EVENT_MSK;
	159
	160	return 0;
	161	}
	162
	163	static int allocate_bd(struct net_device *dev)
	164	{
	165	struct fs_enet_private *fep = netdev_priv(dev);
	166	const struct fs_platform_info *fpi = fep->fpi;
	167
	168	fep->ring_mem_addr = cpm_dpalloc((fpi->tx_ring + fpi->rx_ring) *
	169	sizeof(cbd_t), 8);
	170	if (IS_DPERR(fep->ring_mem_addr))
	171	return -ENOMEM;
	172
	173	fep->ring_base = cpm_dpram_addr(fep->ring_mem_addr);
	174
	175	return 0;
	176	}
	177
	178	static void free_bd(struct net_device *dev)
	179	{
	180	struct fs_enet_private *fep = netdev_priv(dev);
	181
	182	if (fep->ring_base)
	183	cpm_dpfree(fep->ring_mem_addr);
	184	}
	185
	186	static void cleanup_data(struct net_device *dev)
	187	{
	188	/* nothing */
	189	}
	190
	191	static void set_promiscuous_mode(struct net_device *dev)
	192	{
193	struct fs_enet_private *fep = netdev_priv(dev);
194	scc_t *sccp = fep->scc.sccp;
195
196	S16(sccp, scc_psmr, SCC_PSMR_PRO);
197	}
198
199	static void set_multicast_start(struct net_device *dev)
200	{
201	struct fs_enet_private *fep = netdev_priv(dev);
202	scc_enet_t *ep = fep->scc.ep;
203
204	W16(ep, sen_gaddr1, 0);
205	W16(ep, sen_gaddr2, 0);
206	W16(ep, sen_gaddr3, 0);
207	W16(ep, sen_gaddr4, 0);
208	}
209
210	static void set_multicast_one(struct net_device dev, const u8 mac)
211	{
212	struct fs_enet_private *fep = netdev_priv(dev);
213	scc_enet_t *ep = fep->scc.ep;
214	u16 taddrh, taddrm, taddrl;
215
216	taddrh = ((u16) mac[5] << 8) \| mac[4];
217	taddrm = ((u16) mac[3] << 8) \| mac[2];
218	taddrl = ((u16) mac[1] << 8) \| mac[0];
219
220	W16(ep, sen_taddrh, taddrh);
221	W16(ep, sen_taddrm, taddrm);
222	W16(ep, sen_taddrl, taddrl);
223	scc_cr_cmd(fep, CPM_CR_SET_GADDR);
224	}
225
226	static void set_multicast_finish(struct net_device *dev)
227	{
228	struct fs_enet_private *fep = netdev_priv(dev);
229	scc_t *sccp = fep->scc.sccp;
230	scc_enet_t *ep = fep->scc.ep;
231
232	/* clear promiscuous always */
233	C16(sccp, scc_psmr, SCC_PSMR_PRO);
234
235	/* if all multi or too many multicasts; just enable all */
236	if ((dev->flags & IFF_ALLMULTI) != 0 \|\|
237	dev->mc_count > SCC_MAX_MULTICAST_ADDRS) {
238
239	W16(ep, sen_gaddr1, 0xffff);
240	W16(ep, sen_gaddr2, 0xffff);
241	W16(ep, sen_gaddr3, 0xffff);
242	W16(ep, sen_gaddr4, 0xffff);
243	}
244	}
245
246	static void set_multicast_list(struct net_device *dev)
247	{
248	struct dev_mc_list *pmc;
249
250	if ((dev->flags & IFF_PROMISC) == 0) {
251	set_multicast_start(dev);
252	for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next)
253	set_multicast_one(dev, pmc->dmi_addr);
254	set_multicast_finish(dev);
255	} else
256	set_promiscuous_mode(dev);
257	}
258
259	/*
260	* This function is called to start or restart the FEC during a link
261	* change. This only happens when switching between half and full
262	* duplex.
263	*/
264	static void restart(struct net_device *dev)
265	{
266	struct fs_enet_private *fep = netdev_priv(dev);
267	scc_t *sccp = fep->scc.sccp;
268	scc_enet_t *ep = fep->scc.ep;
269	const struct fs_platform_info *fpi = fep->fpi;
270	u16 paddrh, paddrm, paddrl;
271	const unsigned char *mac;
272	int i;
273
274	C32(sccp, scc_gsmrl, SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
275
276	/* clear everything (slow & steady does it) */
277	for (i = 0; i < sizeof(*ep); i++)
278	__fs_out8((char *)ep + i, 0);
279
280	/* point to bds */
281	W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr);
282	W16(ep, sen_genscc.scc_tbase,
283	fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring);
284
285	/* Initialize function code registers for big-endian.
286	*/
287	W8(ep, sen_genscc.scc_rfcr, SCC_EB);
288	W8(ep, sen_genscc.scc_tfcr, SCC_EB);
289
290	/* Set maximum bytes per receive buffer.
291	* This appears to be an Ethernet frame size, not the buffer
292	* fragment size. It must be a multiple of four.
293	*/
294	W16(ep, sen_genscc.scc_mrblr, 0x5f0);
295
296	/* Set CRC preset and mask.
297	*/
298	W32(ep, sen_cpres, 0xffffffff);
299	W32(ep, sen_cmask, 0xdebb20e3);
300
301	W32(ep, sen_crcec, 0); /* CRC Error counter */
302	W32(ep, sen_alec, 0); /* alignment error counter */
303	W32(ep, sen_disfc, 0); /* discard frame counter */
304
305	W16(ep, sen_pads, 0x8888); /* Tx short frame pad character */
306	W16(ep, sen_retlim, 15); /* Retry limit threshold */
307
308	W16(ep, sen_maxflr, 0x5ee); /* maximum frame length register */
309
310	W16(ep, sen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */
311
312	W16(ep, sen_maxd1, 0x000005f0); /* maximum DMA1 length */
313	W16(ep, sen_maxd2, 0x000005f0); /* maximum DMA2 length */
314
315	/* Clear hash tables.
316	*/
317	W16(ep, sen_gaddr1, 0);
318	W16(ep, sen_gaddr2, 0);
319	W16(ep, sen_gaddr3, 0);
320	W16(ep, sen_gaddr4, 0);
321	W16(ep, sen_iaddr1, 0);
322	W16(ep, sen_iaddr2, 0);
323	W16(ep, sen_iaddr3, 0);
324	W16(ep, sen_iaddr4, 0);
325
326	/* set address
327	*/
328	mac = dev->dev_addr;
329	paddrh = ((u16) mac[5] << 8) \| mac[4];
330	paddrm = ((u16) mac[3] << 8) \| mac[2];
331	paddrl = ((u16) mac[1] << 8) \| mac[0];
332
333	W16(ep, sen_paddrh, paddrh);
334	W16(ep, sen_paddrm, paddrm);
335	W16(ep, sen_paddrl, paddrl);
336
337	W16(ep, sen_pper, 0);
338	W16(ep, sen_taddrl, 0);
339	W16(ep, sen_taddrm, 0);
340	W16(ep, sen_taddrh, 0);
341
342	fs_init_bds(dev);
343
344	scc_cr_cmd(fep, CPM_CR_INIT_TRX);
345
346	W16(sccp, scc_scce, 0xffff);
347
348	/* Enable interrupts we wish to service.
349	*/
350	W16(sccp, scc_sccm, SCCE_ENET_TXE \| SCCE_ENET_RXF \| SCCE_ENET_TXB);
351
352	/* Set GSMR_H to enable all normal operating modes.
353	* Set GSMR_L to enable Ethernet to MC68160.
354	*/
355	W32(sccp, scc_gsmrh, 0);
356	W32(sccp, scc_gsmrl,
357	SCC_GSMRL_TCI \| SCC_GSMRL_TPL_48 \| SCC_GSMRL_TPP_10 \|
358	SCC_GSMRL_MODE_ENET);
359
360	/* Set sync/delimiters.
361	*/
362	W16(sccp, scc_dsr, 0xd555);
363
364	/* Set processing mode. Use Ethernet CRC, catch broadcast, and
365	* start frame search 22 bit times after RENA.
366	*/
367	W16(sccp, scc_psmr, SCC_PSMR_ENCRC \| SCC_PSMR_NIB22);
368
369	/* Set full duplex mode if needed */
5b4b8454	370	if (fep->phydev->duplex)
48257c4f PA	371	S16(sccp, scc_psmr, SCC_PSMR_LPB \| SCC_PSMR_FDE);
	372
	373	S32(sccp, scc_gsmrl, SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
	374	}
	375
	376	static void stop(struct net_device *dev)
	377	{
	378	struct fs_enet_private *fep = netdev_priv(dev);
	379	scc_t *sccp = fep->scc.sccp;
	380	int i;
	381
	382	for (i = 0; (R16(sccp, scc_sccm) == 0) && i < SCC_RESET_DELAY; i++)
	383	udelay(1);
	384
	385	if (i == SCC_RESET_DELAY)
	386	printk(KERN_WARNING DRV_MODULE_NAME
	387	": %s SCC timeout on graceful transmit stop\n",
	388	dev->name);
	389
	390	W16(sccp, scc_sccm, 0);
	391	C32(sccp, scc_gsmrl, SCC_GSMRL_ENR \| SCC_GSMRL_ENT);
	392
	393	fs_cleanup_bds(dev);
	394	}
	395
	396	static void pre_request_irq(struct net_device *dev, int irq)
	397	{
b1f54ba3	398	#ifndef CONFIG_PPC_MERGE
48257c4f PA	399	immap_t *immap = fs_enet_immap;
	400	u32 siel;
	401
	402	/* SIU interrupt */
	403	if (irq >= SIU_IRQ0 && irq < SIU_LEVEL7) {
	404
	405	siel = in_be32(&immap->im_siu_conf.sc_siel);
	406	if ((irq & 1) == 0)
	407	siel \|= (0x80000000 >> irq);
	408	else
	409	siel &= ~(0x80000000 >> (irq & ~1));
	410	out_be32(&immap->im_siu_conf.sc_siel, siel);
	411	}
b1f54ba3	412	#endif
48257c4f PA	413	}
	414
	415	static void post_free_irq(struct net_device *dev, int irq)
	416	{
	417	/* nothing */
	418	}
	419
	420	static void napi_clear_rx_event(struct net_device *dev)
	421	{
	422	struct fs_enet_private *fep = netdev_priv(dev);
	423	scc_t *sccp = fep->scc.sccp;
	424
	425	W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK);
	426	}
	427
	428	static void napi_enable_rx(struct net_device *dev)
	429	{
	430	struct fs_enet_private *fep = netdev_priv(dev);
	431	scc_t *sccp = fep->scc.sccp;
	432
	433	S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
	434	}
	435
	436	static void napi_disable_rx(struct net_device *dev)
	437	{
	438	struct fs_enet_private *fep = netdev_priv(dev);
	439	scc_t *sccp = fep->scc.sccp;
	440
	441	C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
	442	}
	443
	444	static void rx_bd_done(struct net_device *dev)
	445	{
	446	/* nothing */
	447	}
	448
	449	static void tx_kickstart(struct net_device *dev)
	450	{
	451	/* nothing */
	452	}
	453
	454	static u32 get_int_events(struct net_device *dev)
	455	{
	456	struct fs_enet_private *fep = netdev_priv(dev);
	457	scc_t *sccp = fep->scc.sccp;
	458
	459	return (u32) R16(sccp, scc_scce);
	460	}
	461
	462	static void clear_int_events(struct net_device *dev, u32 int_events)
	463	{
	464	struct fs_enet_private *fep = netdev_priv(dev);
	465	scc_t *sccp = fep->scc.sccp;
	466
	467	W16(sccp, scc_scce, int_events & 0xffff);
	468	}
	469
	470	static void ev_error(struct net_device *dev, u32 int_events)
	471	{
	472	printk(KERN_WARNING DRV_MODULE_NAME
	473	": %s SCC ERROR(s) 0x%x\n", dev->name, int_events);
	474	}
	475
	476	static int get_regs(struct net_device dev, void p, int *sizep)
477	{
478	struct fs_enet_private *fep = netdev_priv(dev);
479
480	if (*sizep < sizeof(scc_t) + sizeof(scc_enet_t))
481	return -EINVAL;
482
483	memcpy_fromio(p, fep->scc.sccp, sizeof(scc_t));
484	p = (char *)p + sizeof(scc_t);
485
486	memcpy_fromio(p, fep->scc.ep, sizeof(scc_enet_t));
487
488	return 0;
489	}
490
491	static int get_regs_len(struct net_device *dev)
492	{
493	return sizeof(scc_t) + sizeof(scc_enet_t);
494	}
495
496	static void tx_restart(struct net_device *dev)
497	{
498	struct fs_enet_private *fep = netdev_priv(dev);
499
500	scc_cr_cmd(fep, CPM_CR_RESTART_TX);
501	}
502
5b4b8454 VB	503
5b4b8454 VB	504
48257c4f PA	505	/*************************************************************************/
	506
	507	const struct fs_ops fs_scc_ops = {
	508	.setup_data = setup_data,
	509	.cleanup_data = cleanup_data,
	510	.set_multicast_list = set_multicast_list,
	511	.restart = restart,
	512	.stop = stop,
	513	.pre_request_irq = pre_request_irq,
	514	.post_free_irq = post_free_irq,
	515	.napi_clear_rx_event = napi_clear_rx_event,
	516	.napi_enable_rx = napi_enable_rx,
	517	.napi_disable_rx = napi_disable_rx,
	518	.rx_bd_done = rx_bd_done,
	519	.tx_kickstart = tx_kickstart,
	520	.get_int_events = get_int_events,
	521	.clear_int_events = clear_int_events,
	522	.ev_error = ev_error,
	523	.get_regs = get_regs,
	524	.get_regs_len = get_regs_len,
	525	.tx_restart = tx_restart,
	526	.allocate_bd = allocate_bd,
	527	.free_bd = free_bd,
	528	};