4xx_enet.c

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/*-----------------------------------------------------------------------------+
 *
 *	 This source code has been made available to you by IBM on an AS-IS
 *	 basis.	 Anyone receiving this source is licensed under IBM
 *	 copyrights to use it in any way he or she deems fit, including
 *	 copying it, modifying it, compiling it, and redistributing it either
 *	 with or without modifications.	 No license under IBM patents or
 *	 patent applications is to be implied by the copyright license.
 *
 *	 Any user of this software should understand that IBM cannot provide
 *	 technical support for this software and will not be responsible for
 *	 any consequences resulting from the use of this software.
 *
 *	 Any person who transfers this source code or any derivative work
 *	 must include the IBM copyright notice, this paragraph, and the
 *	 preceding two paragraphs in the transferred software.
 *
 *	 COPYRIGHT   I B M   CORPORATION 1995
 *	 LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
 *-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------+
 *
 *  File Name:	enetemac.c
 *
 *  Function:	Device driver for the ethernet EMAC3 macro on the 405GP.
 *
 *  Author:	Mark Wisner
 *
 *  Change Activity-
 *
 *  Date	Description of Change					    BY
 *  ---------	---------------------					    ---
 *  05-May-99	Created							    MKW
 *  27-Jun-99	Clean up						    JWB
 *  16-Jul-99	Added MAL error recovery and better IP packet handling	    MKW
 *  29-Jul-99	Added Full duplex support				    MKW
 *  06-Aug-99	Changed names for Mal CR reg				    MKW
 *  23-Aug-99	Turned off SYE when running at 10Mbs			    MKW
 *  24-Aug-99	Marked descriptor empty after call_xlc			    MKW
 *  07-Sep-99	Set MAL RX buffer size reg to ENET_MAX_MTU_ALIGNED / 16	    MCG
 *		to avoid chaining maximum sized packets. Push starting
 *		RX descriptor address up to the next cache line boundary.
 *  16-Jan-00	Added support for booting with IP of 0x0		    MKW
 *  15-Mar-00	Updated enetInit() to enable broadcast addresses in the
 *		EMAC_RXM register.					    JWB
 *  12-Mar-01	[e-mail]
 *		 - Variables are compatible with those already defined in
 *		  include/net.h
 *		- Receive buffer descriptor ring is used to send buffers
 *		  to the user
 *		- Info print about send/received/handled packet number if
 *		  INFO_405_ENET is set
 *  17-Apr-01	[e-mail]
 *		- MAL reset in "eth_halt" included
 *		- Enet speed and duplex output now in one line
 *  08-May-01	[e-mail]
 *		- MAL error handling added (eth_init called again)
 *  13-Nov-01	[e-mail]
 *		- Set IST bit in EMAC_M1 reg upon 100MBit or full duplex
 *  04-Jan-02	[e-mail]
 *		- Wait for PHY auto negotiation to complete added
 *  06-Feb-02	[e-mail]
 *		- Bug fixed in waiting for auto negotiation to complete
 *  26-Feb-02	[e-mail]
 *		- rx and tx buffer descriptors now allocated (no fixed address
 *		  used anymore)
 *  17-Jun-02	[e-mail]
 *		- MAL error debug printf 'M' removed (rx de interrupt may
 *		  occur upon many incoming packets with only 4 rx buffers).
 *-----------------------------------------------------------------------------*
 *  17-Nov-03	[e-mail]
 *		- ported from 405gp_enet.c to utilized upto 4 EMAC ports
 *		  in the 440GX.	 This port should work with the 440GP
 *		  (2 EMACs) also
 *  15-Aug-05	[e-mail]
 *		- merged 405gp_enet.c and 440gx_enet.c to generic 4xx_enet.c
		  now handling all 4xx cpu's.
 *-----------------------------------------------------------------------------*/

#include <config.h>
#include <common.h>
#include <net.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/cache.h>
#include <asm/mmu.h>
#include <commproc.h>
#include <ppc4xx.h>
#include <ppc4xx_enet.h>
#include <405_mal.h>
#include <miiphy.h>
#include <malloc.h>
#include <asm/ppc4xx-intvec.h>

/*
 * Only compile for platform with AMCC EMAC ethernet controller and
 * network support enabled.
 * Remark: CONFIG_405 describes Xilinx PPC405 FPGA without EMAC controller!
 */
#if defined(CONFIG_CMD_NET) && !defined(CONFIG_405) && !defined(CONFIG_IOP480)

#if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
#error "CONFIG_MII has to be defined!"
#endif

#if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_NET_MULTI)
#error "CONFIG_NET_MULTI has to be defined for NetConsole"
#endif

#define EMAC_RESET_TIMEOUT 1000 /* 1000 ms reset timeout */
#define PHY_AUTONEGOTIATE_TIMEOUT 5000	/* 5000 ms autonegotiate timeout */

/* Ethernet Transmit and Receive Buffers */
/* AS.HARNOIS
 * In the same way ENET_MAX_MTU and ENET_MAX_MTU_ALIGNED are set from
 * PKTSIZE and PKTSIZE_ALIGN (include/net.h)
 */
#define ENET_MAX_MTU	       PKTSIZE
#define ENET_MAX_MTU_ALIGNED   PKTSIZE_ALIGN

/*-----------------------------------------------------------------------------+
 * Defines for MAL/EMAC interrupt conditions as reported in the UIC (Universal
 * Interrupt Controller).
 *-----------------------------------------------------------------------------*/
#define MAL_UIC_ERR ( UIC_MAL_SERR | UIC_MAL_TXDE  | UIC_MAL_RXDE)
#define MAL_UIC_DEF  (UIC_MAL_RXEOB | MAL_UIC_ERR)
#define EMAC_UIC_DEF UIC_ENET
#define EMAC_UIC_DEF1 UIC_ENET1
#define SEL_UIC_DEF(p) (p ? UIC_ENET1 : UIC_ENET )

#undef INFO_4XX_ENET

#define BI_PHYMODE_NONE	 0
#define BI_PHYMODE_ZMII	 1
#define BI_PHYMODE_RGMII 2
#define BI_PHYMODE_GMII  3
#define BI_PHYMODE_RTBI  4
#define BI_PHYMODE_TBI   5
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
#define BI_PHYMODE_SMII  6
#define BI_PHYMODE_MII   7
#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define BI_PHYMODE_RMII  8
#endif
#endif

#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
#define SDR0_MFR_ETH_CLK_SEL_V(n)	((0x01<<27) / (n+1))
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define SDR0_ETH_CFG_CLK_SEL_V(n)	(0x01 << (8 + n))
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define MAL_RX_CHAN_MUL	8	/* 460EX/GT uses MAL channel 8 for EMAC1 */
#else
#define MAL_RX_CHAN_MUL	1
#endif

/*-----------------------------------------------------------------------------+
 * Global variables. TX and RX descriptors and buffers.
 *-----------------------------------------------------------------------------*/
/* IER globals */
static uint32_t mal_ier;

#if !defined(CONFIG_NET_MULTI)
struct eth_device *emac0_dev = NULL;
#endif

/*
 * Get count of EMAC devices (doesn't have to be the max. possible number
 * supported by the cpu)
 *
 * CONFIG_BOARD_EMAC_COUNT added so now a "dynamic" way to configure the
 * EMAC count is possible. As it is needed for the Kilauea/Haleakala
 * 405EX/405EXr eval board, using the same binary.
 */
#if defined(CONFIG_BOARD_EMAC_COUNT)
#define LAST_EMAC_NUM	board_emac_count()
#else /* CONFIG_BOARD_EMAC_COUNT */
#if defined(CONFIG_HAS_ETH3)
#define LAST_EMAC_NUM	4
#elif defined(CONFIG_HAS_ETH2)
#define LAST_EMAC_NUM	3
#elif defined(CONFIG_HAS_ETH1)
#define LAST_EMAC_NUM	2
#else
#define LAST_EMAC_NUM	1
#endif
#endif /* CONFIG_BOARD_EMAC_COUNT */

/* normal boards start with EMAC0 */
#if !defined(CONFIG_EMAC_NR_START)
#define CONFIG_EMAC_NR_START	0
#endif

#if defined(CONFIG_405EX) || defined(CONFIG_440EPX)
#define ETH_IRQ_NUM(dev)	(VECNUM_ETH0 + ((dev)))
#else
#define ETH_IRQ_NUM(dev)	(VECNUM_ETH0 + ((dev) * 2))
#endif

#define MAL_RX_DESC_SIZE	2048
#define MAL_TX_DESC_SIZE	2048
#define MAL_ALLOC_SIZE		(MAL_TX_DESC_SIZE + MAL_RX_DESC_SIZE)

/*-----------------------------------------------------------------------------+
 * Prototypes and externals.
 *-----------------------------------------------------------------------------*/
static void enet_rcv (struct eth_device *dev, unsigned long malisr);

int enetInt (struct eth_device *dev);
static void mal_err (struct eth_device *dev, unsigned long isr,
		     unsigned long uic, unsigned long maldef,
		     unsigned long mal_errr);
static void emac_err (struct eth_device *dev, unsigned long isr);

extern int phy_setup_aneg (char *devname, unsigned char addr);
extern int emac4xx_miiphy_read (char *devname, unsigned char addr,
		unsigned char reg, unsigned short *value);
extern int emac4xx_miiphy_write (char *devname, unsigned char addr,
		unsigned char reg, unsigned short value);

int board_emac_count(void);

static void emac_loopback_enable(EMAC_4XX_HW_PST hw_p)
{
#if defined(CONFIG_440SPE) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_405EX)
	u32 val;

	mfsdr(sdr_mfr, val);
	val |= SDR0_MFR_ETH_CLK_SEL_V(hw_p->devnum);
	mtsdr(sdr_mfr, val);
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
	u32 val;

	mfsdr(SDR0_ETH_CFG, val);
	val |= SDR0_ETH_CFG_CLK_SEL_V(hw_p->devnum);
	mtsdr(SDR0_ETH_CFG, val);
#endif
}

static void emac_loopback_disable(EMAC_4XX_HW_PST hw_p)
{
#if defined(CONFIG_440SPE) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_405EX)
	u32 val;

	mfsdr(sdr_mfr, val);
	val &= ~SDR0_MFR_ETH_CLK_SEL_V(hw_p->devnum);
	mtsdr(sdr_mfr, val);
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
	u32 val;

	mfsdr(SDR0_ETH_CFG, val);
	val &= ~SDR0_ETH_CFG_CLK_SEL_V(hw_p->devnum);
	mtsdr(SDR0_ETH_CFG, val);
#endif
}

/*-----------------------------------------------------------------------------+
| ppc_4xx_eth_halt
| Disable MAL channel, and EMACn
+-----------------------------------------------------------------------------*/
static void ppc_4xx_eth_halt (struct eth_device *dev)
{
	EMAC_4XX_HW_PST hw_p = dev->priv;
	u32 val = 10000;

	out_be32((void *)EMAC_IER + hw_p->hw_addr, 0x00000000);	/* disable emac interrupts */

	/* 1st reset MAL channel */
	/* Note: writing a 0 to a channel has no effect */
#if defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
	mtdcr (maltxcarr, (MAL_CR_MMSR >> (hw_p->devnum * 2)));
#else
	mtdcr (maltxcarr, (MAL_CR_MMSR >> hw_p->devnum));
#endif
	mtdcr (malrxcarr, (MAL_CR_MMSR >> hw_p->devnum));

	/* wait for reset */
	while (mfdcr (malrxcasr) & (MAL_CR_MMSR >> hw_p->devnum)) {
		udelay (1000);	/* Delay 1 MS so as not to hammer the register */
		val--;
		if (val == 0)
			break;
	}

	/* provide clocks for EMAC internal loopback  */
	emac_loopback_enable(hw_p);

	/* EMAC RESET */
	out_be32((void *)EMAC_M0 + hw_p->hw_addr, EMAC_M0_SRST);

	/* remove clocks for EMAC internal loopback  */
	emac_loopback_disable(hw_p);

#ifndef CONFIG_NETCONSOLE
	hw_p->print_speed = 1;	/* print speed message again next time */
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
	/* don't bypass the TAHOE0/TAHOE1 cores for Linux */
	mfsdr(SDR0_ETH_CFG, val);
	val &= ~(SDR0_ETH_CFG_TAHOE0_BYPASS | SDR0_ETH_CFG_TAHOE1_BYPASS);
	mtsdr(SDR0_ETH_CFG, val);
#endif

	return;
}

#if defined (CONFIG_440GX)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	unsigned long pfc1;
	unsigned long zmiifer;
	unsigned long rmiifer;

	mfsdr(sdr_pfc1, pfc1);
	pfc1 = SDR0_PFC1_EPS_DECODE(pfc1);

	zmiifer = 0;
	rmiifer = 0;

	switch (pfc1) {
	case 1:
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(1);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(2);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	case 2:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(1);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(2);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	case 3:
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 4:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(1);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V (2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V (3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		bis->bi_phymode[3] = BI_PHYMODE_RGMII;
		break;
	case 5:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (1);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_RGMII;
		break;
	case 6:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (1);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		break;
	case 0:
	default:
		zmiifer = ZMII_FER_MII << ZMII_FER_V(devnum);
		rmiifer = 0x0;
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	}

	/* Ensure we setup mdio for this devnum and ONLY this devnum */
	zmiifer |= (ZMII_FER_MDI) << ZMII_FER_V(devnum);

	out_be32((void *)ZMII_FER, zmiifer);
	out_be32((void *)RGMII_FER, rmiifer);

	return ((int)pfc1);
}
#endif	/* CONFIG_440_GX */

#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	unsigned long zmiifer=0x0;
	unsigned long pfc1;

	mfsdr(sdr_pfc1, pfc1);
	pfc1 &= SDR0_PFC1_SELECT_MASK;

	switch (pfc1) {
	case SDR0_PFC1_SELECT_CONFIG_2:
		/* 1 x GMII port */
		out_be32((void *)ZMII_FER, 0x00);
		out_be32((void *)RGMII_FER, 0x00000037);
		bis->bi_phymode[0] = BI_PHYMODE_GMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	case SDR0_PFC1_SELECT_CONFIG_4:
		/* 2 x RGMII ports */
		out_be32((void *)ZMII_FER, 0x00);
		out_be32((void *)RGMII_FER, 0x00000055);
		bis->bi_phymode[0] = BI_PHYMODE_RGMII;
		bis->bi_phymode[1] = BI_PHYMODE_RGMII;
		break;
	case SDR0_PFC1_SELECT_CONFIG_6:
		/* 2 x SMII ports */
		out_be32((void *)ZMII_FER,
			 ((ZMII_FER_SMII) << ZMII_FER_V(0)) |
			 ((ZMII_FER_SMII) << ZMII_FER_V(1)));
		out_be32((void *)RGMII_FER, 0x00000000);
		bis->bi_phymode[0] = BI_PHYMODE_SMII;
		bis->bi_phymode[1] = BI_PHYMODE_SMII;
		break;
	case SDR0_PFC1_SELECT_CONFIG_1_2:
		/* only 1 x MII supported */
		out_be32((void *)ZMII_FER, (ZMII_FER_MII) << ZMII_FER_V(0));
		out_be32((void *)RGMII_FER, 0x00000000);
		bis->bi_phymode[0] = BI_PHYMODE_MII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	default:
		break;
	}

	/* Ensure we setup mdio for this devnum and ONLY this devnum */
	zmiifer = in_be32((void *)ZMII_FER);
	zmiifer |= (ZMII_FER_MDI) << ZMII_FER_V(devnum);
	out_be32((void *)ZMII_FER, zmiifer);

	return ((int)0x0);
}
#endif	/* CONFIG_440EPX */

#if defined(CONFIG_405EX)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	u32 gmiifer = 0;

	/*
	 * Right now only 2*RGMII is supported. Please extend when needed.
	 * sr - 2007-09-19
	 */
	switch (1) {
	case 1:
		/* 2 x RGMII ports */
		out_be32((void *)RGMII_FER, 0x00000055);
		bis->bi_phymode[0] = BI_PHYMODE_RGMII;
		bis->bi_phymode[1] = BI_PHYMODE_RGMII;
		break;
	case 2:
		/* 2 x SMII ports */
		break;
	default:
		break;
	}

	/* Ensure we setup mdio for this devnum and ONLY this devnum */
	gmiifer = in_be32((void *)RGMII_FER);
	gmiifer |= (1 << (19-devnum));
	out_be32((void *)RGMII_FER, gmiifer);

	return ((int)0x0);
}
#endif  /* CONFIG_405EX */

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	u32 eth_cfg;
	u32 zmiifer;		/* ZMII0_FER reg. */
	u32 rmiifer;		/* RGMII0_FER reg. Bridge 0 */
	u32 rmiifer1;		/* RGMII0_FER reg. Bridge 1 */
	int mode;

	zmiifer  = 0;
	rmiifer  = 0;
	rmiifer1 = 0;

#if defined(CONFIG_460EX)
	mode = 9;
#else
	mode = 10;
#endif

	/* TODO:
	 * NOTE: 460GT has 2 RGMII bridge cores:
	 *		emac0 ------ RGMII0_BASE
	 *		           |
	 *		emac1 -----+
	 *
	 *		emac2 ------ RGMII1_BASE
	 *		           |
	 *		emac3 -----+
	 *