[net-next-2.6.git] / drivers / net / stmmac / dwmac100_core.c

/*******************************************************************************
  This is the driver for the MAC 10/100 on-chip Ethernet controller
  currently tested on all the ST boards based on STb7109 and stx7200 SoCs.

  DWC Ether MAC 10/100 Universal version 4.0 has been used for developing
  this code.

  This only implements the mac core functions for this chip.

  Copyright (C) 2007-2009  STMicroelectronics Ltd

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/

#include <linux/crc32.h>
#include "dwmac100.h"

static void dwmac100_core_init(void __iomem *ioaddr)
{
	u32 value = readl(ioaddr + MAC_CONTROL);

	writel((value | MAC_CORE_INIT), ioaddr + MAC_CONTROL);

#ifdef STMMAC_VLAN_TAG_USED
	writel(ETH_P_8021Q, ioaddr + MAC_VLAN1);
#endif
}

static void dwmac100_dump_mac_regs(void __iomem *ioaddr)
{
	pr_info("\t----------------------------------------------\n"
		"\t  DWMAC 100 CSR (base addr = 0x%p)\n"
		"\t----------------------------------------------\n",
		ioaddr);
	pr_info("\tcontrol reg (offset 0x%x): 0x%08x\n", MAC_CONTROL,
		readl(ioaddr + MAC_CONTROL));
	pr_info("\taddr HI (offset 0x%x): 0x%08x\n ", MAC_ADDR_HIGH,
		readl(ioaddr + MAC_ADDR_HIGH));
	pr_info("\taddr LO (offset 0x%x): 0x%08x\n", MAC_ADDR_LOW,
		readl(ioaddr + MAC_ADDR_LOW));
	pr_info("\tmulticast hash HI (offset 0x%x): 0x%08x\n",
		MAC_HASH_HIGH, readl(ioaddr + MAC_HASH_HIGH));
	pr_info("\tmulticast hash LO (offset 0x%x): 0x%08x\n",
		MAC_HASH_LOW, readl(ioaddr + MAC_HASH_LOW));
	pr_info("\tflow control (offset 0x%x): 0x%08x\n",
		MAC_FLOW_CTRL, readl(ioaddr + MAC_FLOW_CTRL));
	pr_info("\tVLAN1 tag (offset 0x%x): 0x%08x\n", MAC_VLAN1,
		readl(ioaddr + MAC_VLAN1));
	pr_info("\tVLAN2 tag (offset 0x%x): 0x%08x\n", MAC_VLAN2,
		readl(ioaddr + MAC_VLAN2));
	pr_info("\n\tMAC management counter registers\n");
	pr_info("\t MMC crtl (offset 0x%x): 0x%08x\n",
		MMC_CONTROL, readl(ioaddr + MMC_CONTROL));
	pr_info("\t MMC High Interrupt (offset 0x%x): 0x%08x\n",
		MMC_HIGH_INTR, readl(ioaddr + MMC_HIGH_INTR));
	pr_info("\t MMC Low Interrupt (offset 0x%x): 0x%08x\n",
		MMC_LOW_INTR, readl(ioaddr + MMC_LOW_INTR));
	pr_info("\t MMC High Interrupt Mask (offset 0x%x): 0x%08x\n",
		MMC_HIGH_INTR_MASK, readl(ioaddr + MMC_HIGH_INTR_MASK));
	pr_info("\t MMC Low Interrupt Mask (offset 0x%x): 0x%08x\n",
		MMC_LOW_INTR_MASK, readl(ioaddr + MMC_LOW_INTR_MASK));
}

static void dwmac100_irq_status(void __iomem *ioaddr)
{
	return;
}

static void dwmac100_set_umac_addr(void __iomem *ioaddr, unsigned char *addr,
				   unsigned int reg_n)
{
	stmmac_set_mac_addr(ioaddr, addr, MAC_ADDR_HIGH, MAC_ADDR_LOW);
}

static void dwmac100_get_umac_addr(void __iomem *ioaddr, unsigned char *addr,
				   unsigned int reg_n)
{
	stmmac_get_mac_addr(ioaddr, addr, MAC_ADDR_HIGH, MAC_ADDR_LOW);
}

static void dwmac100_set_filter(struct net_device *dev)
{
	void __iomem *ioaddr = (void __iomem *) dev->base_addr;
	u32 value = readl(ioaddr + MAC_CONTROL);

	if (dev->flags & IFF_PROMISC) {
		value |= MAC_CONTROL_PR;
		value &= ~(MAC_CONTROL_PM | MAC_CONTROL_IF | MAC_CONTROL_HO |
			   MAC_CONTROL_HP);
	} else if ((netdev_mc_count(dev) > HASH_TABLE_SIZE)
		   || (dev->flags & IFF_ALLMULTI)) {
		value |= MAC_CONTROL_PM;
		value &= ~(MAC_CONTROL_PR | MAC_CONTROL_IF | MAC_CONTROL_HO);
		writel(0xffffffff, ioaddr + MAC_HASH_HIGH);
		writel(0xffffffff, ioaddr + MAC_HASH_LOW);
	} else if (netdev_mc_empty(dev)) {	/* no multicast */
		value &= ~(MAC_CONTROL_PM | MAC_CONTROL_PR | MAC_CONTROL_IF |
			   MAC_CONTROL_HO | MAC_CONTROL_HP);
	} else {
		u32 mc_filter[2];
		struct netdev_hw_addr *ha;

		/* Perfect filter mode for physical address and Hash
		   filter for multicast */
		value |= MAC_CONTROL_HP;
		value &= ~(MAC_CONTROL_PM | MAC_CONTROL_PR |
			   MAC_CONTROL_IF | MAC_CONTROL_HO);

		memset(mc_filter, 0, sizeof(mc_filter));
		netdev_for_each_mc_addr(ha, dev) {
			/* The upper 6 bits of the calculated CRC are used to
			 * index the contens of the hash table */
			int bit_nr =
			    ether_crc(ETH_ALEN, ha->addr) >> 26;
			/* The most significant bit determines the register to
			 * use (H/L) while the other 5 bits determine the bit
			 * within the register. */
			mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
		}
		writel(mc_filter[0], ioaddr + MAC_HASH_LOW);
		writel(mc_filter[1], ioaddr + MAC_HASH_HIGH);
	}

	writel(value, ioaddr + MAC_CONTROL);

	CHIP_DBG(KERN_INFO "%s: CTRL reg: 0x%08x Hash regs: "
	    "HI 0x%08x, LO 0x%08x\n",
	    __func__, readl(ioaddr + MAC_CONTROL),
	    readl(ioaddr + MAC_HASH_HIGH), readl(ioaddr + MAC_HASH_LOW));
}

static void dwmac100_flow_ctrl(void __iomem *ioaddr, unsigned int duplex,
			       unsigned int fc, unsigned int pause_time)
{
	unsigned int flow = MAC_FLOW_CTRL_ENABLE;

	if (duplex)
		flow |= (pause_time << MAC_FLOW_CTRL_PT_SHIFT);
	writel(flow, ioaddr + MAC_FLOW_CTRL);
}

/* No PMT module supported for this Ethernet Controller.
 * Tested on ST platforms only.
 */
static void dwmac100_pmt(void __iomem *ioaddr, unsigned long mode)
{
	return;
}

struct stmmac_ops dwmac100_ops = {
	.core_init = dwmac100_core_init,
	.dump_regs = dwmac100_dump_mac_regs,
	.host_irq_status = dwmac100_irq_status,
	.set_filter = dwmac100_set_filter,
	.flow_ctrl = dwmac100_flow_ctrl,
	.pmt = dwmac100_pmt,
	.set_umac_addr = dwmac100_set_umac_addr,
	.get_umac_addr = dwmac100_get_umac_addr,
};

struct mac_device_info *dwmac100_setup(void __iomem *ioaddr)
{
	struct mac_device_info *mac;

	mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
	if (!mac)
		return NULL;

	pr_info("\tDWMAC100\n");

	mac->mac = &dwmac100_ops;
	mac->dma = &dwmac100_dma_ops;

	mac->pmt = PMT_NOT_SUPPORTED;
	mac->link.port = MAC_CONTROL_PS;
	mac->link.duplex = MAC_CONTROL_F;
	mac->link.speed = 0;
	mac->mii.addr = MAC_MII_ADDR;
	mac->mii.data = MAC_MII_DATA;

	return mac;
}
Commit	Line	Data
	1	/*******************************************************************************
	2	This is the driver for the MAC 10/100 on-chip Ethernet controller
	3	currently tested on all the ST boards based on STb7109 and stx7200 SoCs.
	4
	5	DWC Ether MAC 10/100 Universal version 4.0 has been used for developing
	6	this code.
	7
	8	This only implements the mac core functions for this chip.
	9
	10	Copyright (C) 2007-2009 STMicroelectronics Ltd
	11
	12	This program is free software; you can redistribute it and/or modify it
	13	under the terms and conditions of the GNU General Public License,
	14	version 2, as published by the Free Software Foundation.
	15
	16	This program is distributed in the hope it will be useful, but WITHOUT
	17	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	18	FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	19	more details.
	20
	21	You should have received a copy of the GNU General Public License along with
	22	this program; if not, write to the Free Software Foundation, Inc.,
	23	51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	24
	25	The full GNU General Public License is included in this distribution in
	26	the file called "COPYING".
	27
	28	Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
	29	*******************************************************************************/
	30
	31	#include <linux/crc32.h>
	32	#include "dwmac100.h"
	33
	34	static void dwmac100_core_init(void __iomem *ioaddr)
	35	{
	36	u32 value = readl(ioaddr + MAC_CONTROL);
	37
	38	writel((value \| MAC_CORE_INIT), ioaddr + MAC_CONTROL);
	39
	40	#ifdef STMMAC_VLAN_TAG_USED
	41	writel(ETH_P_8021Q, ioaddr + MAC_VLAN1);
	42	#endif
	43	}
	44
	45	static void dwmac100_dump_mac_regs(void __iomem *ioaddr)
	46	{
	47	pr_info("\t----------------------------------------------\n"
	48	"\t DWMAC 100 CSR (base addr = 0x%p)\n"
	49	"\t----------------------------------------------\n",
	50	ioaddr);
	51	pr_info("\tcontrol reg (offset 0x%x): 0x%08x\n", MAC_CONTROL,
	52	readl(ioaddr + MAC_CONTROL));
	53	pr_info("\taddr HI (offset 0x%x): 0x%08x\n ", MAC_ADDR_HIGH,
	54	readl(ioaddr + MAC_ADDR_HIGH));
	55	pr_info("\taddr LO (offset 0x%x): 0x%08x\n", MAC_ADDR_LOW,
	56	readl(ioaddr + MAC_ADDR_LOW));
	57	pr_info("\tmulticast hash HI (offset 0x%x): 0x%08x\n",
	58	MAC_HASH_HIGH, readl(ioaddr + MAC_HASH_HIGH));
	59	pr_info("\tmulticast hash LO (offset 0x%x): 0x%08x\n",
	60	MAC_HASH_LOW, readl(ioaddr + MAC_HASH_LOW));
	61	pr_info("\tflow control (offset 0x%x): 0x%08x\n",
	62	MAC_FLOW_CTRL, readl(ioaddr + MAC_FLOW_CTRL));
	63	pr_info("\tVLAN1 tag (offset 0x%x): 0x%08x\n", MAC_VLAN1,
	64	readl(ioaddr + MAC_VLAN1));
	65	pr_info("\tVLAN2 tag (offset 0x%x): 0x%08x\n", MAC_VLAN2,
	66	readl(ioaddr + MAC_VLAN2));
	67	pr_info("\n\tMAC management counter registers\n");
	68	pr_info("\t MMC crtl (offset 0x%x): 0x%08x\n",
	69	MMC_CONTROL, readl(ioaddr + MMC_CONTROL));
	70	pr_info("\t MMC High Interrupt (offset 0x%x): 0x%08x\n",
	71	MMC_HIGH_INTR, readl(ioaddr + MMC_HIGH_INTR));
	72	pr_info("\t MMC Low Interrupt (offset 0x%x): 0x%08x\n",
	73	MMC_LOW_INTR, readl(ioaddr + MMC_LOW_INTR));
	74	pr_info("\t MMC High Interrupt Mask (offset 0x%x): 0x%08x\n",
	75	MMC_HIGH_INTR_MASK, readl(ioaddr + MMC_HIGH_INTR_MASK));
	76	pr_info("\t MMC Low Interrupt Mask (offset 0x%x): 0x%08x\n",
	77	MMC_LOW_INTR_MASK, readl(ioaddr + MMC_LOW_INTR_MASK));
	78	}
	79
	80	static void dwmac100_irq_status(void __iomem *ioaddr)
	81	{
	82	return;
	83	}
	84
	85	static void dwmac100_set_umac_addr(void __iomem ioaddr, unsigned char addr,
	86	unsigned int reg_n)
	87	{
	88	stmmac_set_mac_addr(ioaddr, addr, MAC_ADDR_HIGH, MAC_ADDR_LOW);
	89	}
	90
	91	static void dwmac100_get_umac_addr(void __iomem ioaddr, unsigned char addr,
	92	unsigned int reg_n)
	93	{
	94	stmmac_get_mac_addr(ioaddr, addr, MAC_ADDR_HIGH, MAC_ADDR_LOW);
	95	}
	96
	97	static void dwmac100_set_filter(struct net_device *dev)
	98	{
	99	void __iomem ioaddr = (void __iomem ) dev->base_addr;
	100	u32 value = readl(ioaddr + MAC_CONTROL);
	101
	102	if (dev->flags & IFF_PROMISC) {
	103	value \|= MAC_CONTROL_PR;
	104	value &= ~(MAC_CONTROL_PM \| MAC_CONTROL_IF \| MAC_CONTROL_HO \|
	105	MAC_CONTROL_HP);
	106	} else if ((netdev_mc_count(dev) > HASH_TABLE_SIZE)
	107	\|\| (dev->flags & IFF_ALLMULTI)) {
	108	value \|= MAC_CONTROL_PM;
	109	value &= ~(MAC_CONTROL_PR \| MAC_CONTROL_IF \| MAC_CONTROL_HO);
	110	writel(0xffffffff, ioaddr + MAC_HASH_HIGH);
	111	writel(0xffffffff, ioaddr + MAC_HASH_LOW);
	112	} else if (netdev_mc_empty(dev)) { /* no multicast */
	113	value &= ~(MAC_CONTROL_PM \| MAC_CONTROL_PR \| MAC_CONTROL_IF \|
	114	MAC_CONTROL_HO \| MAC_CONTROL_HP);
	115	} else {
	116	u32 mc_filter[2];
	117	struct netdev_hw_addr *ha;
	118
	119	/* Perfect filter mode for physical address and Hash
	120	filter for multicast */
	121	value \|= MAC_CONTROL_HP;
	122	value &= ~(MAC_CONTROL_PM \| MAC_CONTROL_PR \|
	123	MAC_CONTROL_IF \| MAC_CONTROL_HO);
	124
	125	memset(mc_filter, 0, sizeof(mc_filter));
	126	netdev_for_each_mc_addr(ha, dev) {
	127	/* The upper 6 bits of the calculated CRC are used to
	128	* index the contens of the hash table */
	129	int bit_nr =
	130	ether_crc(ETH_ALEN, ha->addr) >> 26;
	131	/* The most significant bit determines the register to
	132	* use (H/L) while the other 5 bits determine the bit
	133	* within the register. */
	134	mc_filter[bit_nr >> 5] \|= 1 << (bit_nr & 31);
	135	}
	136	writel(mc_filter[0], ioaddr + MAC_HASH_LOW);
	137	writel(mc_filter[1], ioaddr + MAC_HASH_HIGH);
	138	}
	139
	140	writel(value, ioaddr + MAC_CONTROL);
	141
	142	CHIP_DBG(KERN_INFO "%s: CTRL reg: 0x%08x Hash regs: "
	143	"HI 0x%08x, LO 0x%08x\n",
	144	__func__, readl(ioaddr + MAC_CONTROL),
	145	readl(ioaddr + MAC_HASH_HIGH), readl(ioaddr + MAC_HASH_LOW));
	146	}
	147
	148	static void dwmac100_flow_ctrl(void __iomem *ioaddr, unsigned int duplex,
	149	unsigned int fc, unsigned int pause_time)
	150	{
	151	unsigned int flow = MAC_FLOW_CTRL_ENABLE;
	152
	153	if (duplex)
	154	flow \|= (pause_time << MAC_FLOW_CTRL_PT_SHIFT);
	155	writel(flow, ioaddr + MAC_FLOW_CTRL);
	156	}
	157
	158	/* No PMT module supported for this Ethernet Controller.
	159	* Tested on ST platforms only.
	160	*/
	161	static void dwmac100_pmt(void __iomem *ioaddr, unsigned long mode)
	162	{
	163	return;
	164	}
	165
	166	struct stmmac_ops dwmac100_ops = {
	167	.core_init = dwmac100_core_init,
	168	.dump_regs = dwmac100_dump_mac_regs,
	169	.host_irq_status = dwmac100_irq_status,
	170	.set_filter = dwmac100_set_filter,
	171	.flow_ctrl = dwmac100_flow_ctrl,
	172	.pmt = dwmac100_pmt,
	173	.set_umac_addr = dwmac100_set_umac_addr,
	174	.get_umac_addr = dwmac100_get_umac_addr,
	175	};
	176
	177	struct mac_device_info dwmac100_setup(void __iomem ioaddr)
	178	{
	179	struct mac_device_info *mac;
	180
	181	mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
	182	if (!mac)
	183	return NULL;
	184
	185	pr_info("\tDWMAC100\n");
	186
	187	mac->mac = &dwmac100_ops;
	188	mac->dma = &dwmac100_dma_ops;
	189
	190	mac->pmt = PMT_NOT_SUPPORTED;
	191	mac->link.port = MAC_CONTROL_PS;
	192	mac->link.duplex = MAC_CONTROL_F;
	193	mac->link.speed = 0;
	194	mac->mii.addr = MAC_MII_ADDR;
	195	mac->mii.data = MAC_MII_DATA;
	196
	197	return mac;
	198	}