Add fs_enet ethernet network driver, for several embedded platforms.

1 files changed, 578 insertions, 0 deletions

diff --git a/drivers/net/fs_enet/mac-fcc.c b/drivers/net/fs_enet/mac-fcc.c
new file mode 100644
index 000000000000..a940b96433c7
--- /dev/null
+++ b/drivers/net/fs_enet/mac-fcc.c
@@ -0,0 +1,578 @@
+/*
+ * FCC driver for Motorola MPC82xx (PQ2).
+ *
+ * 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/config.h>
+#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 <asm/immap_cpm2.h>
+#include <asm/mpc8260.h>
+#include <asm/cpm2.h>
+
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#include "fs_enet.h"
+
+/*************************************************/
+
+/* FCC access macros */
+
+#define __fcc_out32(addr, x)	out_be32((unsigned *)addr, x)
+#define __fcc_out16(addr, x)	out_be16((unsigned short *)addr, x)
+#define __fcc_out8(addr, x)	out_8((unsigned char *)addr, x)
+#define __fcc_in32(addr)	in_be32((unsigned *)addr)
+#define __fcc_in16(addr)	in_be16((unsigned short *)addr)
+#define __fcc_in8(addr)		in_8((unsigned char *)addr)
+
+/* parameter space */
+
+/* write, read, set bits, clear bits */
+#define W32(_p, _m, _v)	__fcc_out32(&(_p)->_m, (_v))
+#define R32(_p, _m)	__fcc_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)	__fcc_out16(&(_p)->_m, (_v))
+#define R16(_p, _m)	__fcc_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)	__fcc_out8(&(_p)->_m, (_v))
+#define R8(_p, _m)	__fcc_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 FCC_MAX_MULTICAST_ADDRS	64
+
+#define mk_mii_read(REG)	(0x60020000 | ((REG & 0x1f) << 18))
+#define mk_mii_write(REG, VAL)	(0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
+#define mk_mii_end		0
+
+#define MAX_CR_CMD_LOOPS	10000
+
+static inline int fcc_cr_cmd(struct fs_enet_private *fep, u32 mcn, u32 op)
+{
+	const struct fs_platform_info *fpi = fep->fpi;
+
+	cpm2_map_t *immap = fs_enet_immap;
+	cpm_cpm2_t *cpmp = &immap->im_cpm;
+	u32 v;
+	int i;
+
+	/* Currently I don't know what feature call will look like. But 
+	   I guess there'd be something like do_cpm_cmd() which will require page & sblock */
+	v = mk_cr_cmd(fpi->cp_page, fpi->cp_block, mcn, op);
+	W32(cpmp, cp_cpcr, v | CPM_CR_FLG);
+	for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
+		if ((R32(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(pdev, 0);
+
+	/* Attach the memory for the FCC Parameter RAM */
+	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_pram");
+	fep->fcc.ep = (void *)r->start;
+
+	if (fep->fcc.ep == NULL)
+		return -EINVAL;
+
+	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_regs");
+	fep->fcc.fccp = (void *)r->start;
+
+	if (fep->fcc.fccp == NULL)
+		return -EINVAL;
+
+	fep->fcc.fcccp = (void *)fep->fpi->fcc_regs_c;
+
+	if (fep->fcc.fcccp == NULL)
+		return -EINVAL;
+
+	return 0;
+}
+
+#define FCC_NAPI_RX_EVENT_MSK	(FCC_ENET_RXF | FCC_ENET_RXB)
+#define FCC_RX_EVENT		(FCC_ENET_RXF)
+#define FCC_TX_EVENT		(FCC_ENET_TXB)
+#define FCC_ERR_EVENT_MSK	(FCC_ENET_TXE | FCC_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->fcc.idx = fs_get_fcc_index(fpi->fs_no);
+	if ((unsigned int)fep->fcc.idx >= 3)	/* max 3 FCCs */
+		return -EINVAL;
+
+	fep->fcc.mem = (void *)fpi->mem_offset;
+
+	if (do_pd_setup(fep) != 0)
+		return -EINVAL;
+
+	fep->ev_napi_rx = FCC_NAPI_RX_EVENT_MSK;
+	fep->ev_rx = FCC_RX_EVENT;
+	fep->ev_tx = FCC_TX_EVENT;
+	fep->ev_err = FCC_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_base = dma_alloc_coherent(fep->dev,
+					    (fpi->tx_ring + fpi->rx_ring) *
+					    sizeof(cbd_t), &fep->ring_mem_addr,
+					    GFP_KERNEL);
+	if (fep->ring_base == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void free_bd(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	const struct fs_platform_info *fpi = fep->fpi;
+
+	if (fep->ring_base)
+		dma_free_coherent(fep->dev,
+			(fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
+			fep->ring_base, 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);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	S32(fccp, fcc_fpsmr, FCC_PSMR_PRO);
+}
+
+static void set_multicast_start(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_enet_t *ep = fep->fcc.ep;
+
+	W32(ep, fen_gaddrh, 0);
+	W32(ep, fen_gaddrl, 0);
+}
+
+static void set_multicast_one(struct net_device *dev, const u8 *mac)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_enet_t *ep = fep->fcc.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, fen_taddrh, taddrh);
+	W16(ep, fen_taddrm, taddrm);
+	W16(ep, fen_taddrl, taddrl);
+	fcc_cr_cmd(fep, 0x0C, CPM_CR_SET_GADDR);
+}
+
+static void set_multicast_finish(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_t *fccp = fep->fcc.fccp;
+	fcc_enet_t *ep = fep->fcc.ep;
+
+	/* clear promiscuous always */
+	C32(fccp, fcc_fpsmr, FCC_PSMR_PRO);
+
+	/* if all multi or too many multicasts; just enable all */
+	if ((dev->flags & IFF_ALLMULTI) != 0 ||
+	    dev->mc_count > FCC_MAX_MULTICAST_ADDRS) {
+
+		W32(ep, fen_gaddrh, 0xffffffff);
+		W32(ep, fen_gaddrl, 0xffffffff);
+	}
+
+	/* read back */
+	fep->fcc.gaddrh = R32(ep, fen_gaddrh);
+	fep->fcc.gaddrl = R32(ep, fen_gaddrl);
+}
+
+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);
+}
+
+static void restart(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	const struct fs_platform_info *fpi = fep->fpi;
+	fcc_t *fccp = fep->fcc.fccp;
+	fcc_c_t *fcccp = fep->fcc.fcccp;
+	fcc_enet_t *ep = fep->fcc.ep;
+	dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
+	u16 paddrh, paddrm, paddrl;
+	u16 mem_addr;
+	const unsigned char *mac;
+	int i;
+
+	C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
+
+	/* clear everything (slow & steady does it) */
+	for (i = 0; i < sizeof(*ep); i++)
+		__fcc_out8((char *)ep + i, 0);
+
+	/* get physical address */
+	rx_bd_base_phys = fep->ring_mem_addr;
+	tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
+
+	/* point to bds */
+	W32(ep, fen_genfcc.fcc_rbase, rx_bd_base_phys);
+	W32(ep, fen_genfcc.fcc_tbase, tx_bd_base_phys);
+
+	/* Set maximum bytes per receive buffer.
+	 * It must be a multiple of 32.
+	 */
+	W16(ep, fen_genfcc.fcc_mrblr, PKT_MAXBLR_SIZE);
+
+	W32(ep, fen_genfcc.fcc_rstate, (CPMFCR_GBL | CPMFCR_EB) << 24);
+	W32(ep, fen_genfcc.fcc_tstate, (CPMFCR_GBL | CPMFCR_EB) << 24);
+
+	/* Allocate space in the reserved FCC area of DPRAM for the
+	 * internal buffers.  No one uses this space (yet), so we
+	 * can do this.  Later, we will add resource management for
+	 * this area.
+	 */
+
+	mem_addr = (u32) fep->fcc.mem;	/* de-fixup dpram offset */
+
+	W16(ep, fen_genfcc.fcc_riptr, (mem_addr & 0xffff));
+	W16(ep, fen_genfcc.fcc_tiptr, ((mem_addr + 32) & 0xffff));
+	W16(ep, fen_padptr, mem_addr + 64);
+
+	/* fill with special symbol...  */
+	memset(fep->fcc.mem + fpi->dpram_offset + 64, 0x88, 32);
+
+	W32(ep, fen_genfcc.fcc_rbptr, 0);
+	W32(ep, fen_genfcc.fcc_tbptr, 0);
+	W32(ep, fen_genfcc.fcc_rcrc, 0);
+	W32(ep, fen_genfcc.fcc_tcrc, 0);
+	W16(ep, fen_genfcc.fcc_res1, 0);
+	W32(ep, fen_genfcc.fcc_res2, 0);
+
+	/* no CAM */
+	W32(ep, fen_camptr, 0);
+
+	/* Set CRC preset and mask */
+	W32(ep, fen_cmask, 0xdebb20e3);
+	W32(ep, fen_cpres, 0xffffffff);
+
+	W32(ep, fen_crcec, 0);		/* CRC Error counter       */
+	W32(ep, fen_alec, 0);		/* alignment error counter */
+	W32(ep, fen_disfc, 0);		/* discard frame counter   */
+	W16(ep, fen_retlim, 15);	/* Retry limit threshold   */
+	W16(ep, fen_pper, 0);		/* Normal persistence      */
+
+	/* set group address */
+	W32(ep, fen_gaddrh, fep->fcc.gaddrh);
+	W32(ep, fen_gaddrl, fep->fcc.gaddrh);
+
+	/* Clear hash filter tables */
+	W32(ep, fen_iaddrh, 0);
+	W32(ep, fen_iaddrl, 0);
+
+	/* Clear the Out-of-sequence TxBD  */
+	W16(ep, fen_tfcstat, 0);
+	W16(ep, fen_tfclen, 0);
+	W32(ep, fen_tfcptr, 0);
+
+	W16(ep, fen_mflr, PKT_MAXBUF_SIZE);	/* maximum frame length register */
+	W16(ep, fen_minflr, PKT_MINBUF_SIZE);	/* minimum frame length register */
+
+	/* 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, fen_paddrh, paddrh);
+	W16(ep, fen_paddrm, paddrm);
+	W16(ep, fen_paddrl, paddrl);
+
+	W16(ep, fen_taddrh, 0);
+	W16(ep, fen_taddrm, 0);
+	W16(ep, fen_taddrl, 0);
+
+	W16(ep, fen_maxd1, 1520);	/* maximum DMA1 length */
+	W16(ep, fen_maxd2, 1520);	/* maximum DMA2 length */
+
+	/* Clear stat counters, in case we ever enable RMON */
+	W32(ep, fen_octc, 0);
+	W32(ep, fen_colc, 0);
+	W32(ep, fen_broc, 0);
+	W32(ep, fen_mulc, 0);
+	W32(ep, fen_uspc, 0);
+	W32(ep, fen_frgc, 0);
+	W32(ep, fen_ospc, 0);
+	W32(ep, fen_jbrc, 0);
+	W32(ep, fen_p64c, 0);
+	W32(ep, fen_p65c, 0);
+	W32(ep, fen_p128c, 0);
+	W32(ep, fen_p256c, 0);
+	W32(ep, fen_p512c, 0);
+	W32(ep, fen_p1024c, 0);
+
+	W16(ep, fen_rfthr, 0);	/* Suggested by manual */
+	W16(ep, fen_rfcnt, 0);
+	W16(ep, fen_cftype, 0);
+
+	fs_init_bds(dev);
+
+	/* adjust to speed (for RMII mode) */
+	if (fpi->use_rmii) {
+		if (fep->speed == 100)
+			C8(fcccp, fcc_gfemr, 0x20);
+		else
+			S8(fcccp, fcc_gfemr, 0x20);
+	}
+
+	fcc_cr_cmd(fep, 0x0c, CPM_CR_INIT_TRX);
+
+	/* clear events */
+	W16(fccp, fcc_fcce, 0xffff);
+
+	/* Enable interrupts we wish to service */
+	W16(fccp, fcc_fccm, FCC_ENET_TXE | FCC_ENET_RXF | FCC_ENET_TXB);
+
+	/* Set GFMR to enable Ethernet operating mode */
+	W32(fccp, fcc_gfmr, FCC_GFMR_TCI | FCC_GFMR_MODE_ENET);
+
+	/* set sync/delimiters */
+	W16(fccp, fcc_fdsr, 0xd555);
+
+	W32(fccp, fcc_fpsmr, FCC_PSMR_ENCRC);
+
+	if (fpi->use_rmii)
+		S32(fccp, fcc_fpsmr, FCC_PSMR_RMII);
+
+	/* adjust to duplex mode */
+	if (fep->duplex)
+		S32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB);
+	else
+		C32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB);
+
+	S32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
+}
+
+static void stop(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	/* stop ethernet */
+	C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
+
+	/* clear events */
+	W16(fccp, fcc_fcce, 0xffff);
+
+	/* clear interrupt mask */
+	W16(fccp, fcc_fccm, 0);
+
+	fs_cleanup_bds(dev);
+}
+
+static void pre_request_irq(struct net_device *dev, int irq)
+{
+	/* nothing */
+}
+
+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);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	W16(fccp, fcc_fcce, FCC_NAPI_RX_EVENT_MSK);
+}
+
+static void napi_enable_rx(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	S16(fccp, fcc_fccm, FCC_NAPI_RX_EVENT_MSK);
+}
+
+static void napi_disable_rx(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	C16(fccp, fcc_fccm, FCC_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);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	return (u32)R16(fccp, fcc_fcce);
+}
+
+static void clear_int_events(struct net_device *dev, u32 int_events)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	W16(fccp, fcc_fcce, int_events & 0xffff);
+}
+
+static void ev_error(struct net_device *dev, u32 int_events)
+{
+	printk(KERN_WARNING DRV_MODULE_NAME
+	       ": %s FS_ENET ERROR(s) 0x%x\n", dev->name, int_events);
+}
+
+int get_regs(struct net_device *dev, void *p, int *sizep)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+
+	if (*sizep < sizeof(fcc_t) + sizeof(fcc_c_t) + sizeof(fcc_enet_t))
+		return -EINVAL;
+
+	memcpy_fromio(p, fep->fcc.fccp, sizeof(fcc_t));
+	p = (char *)p + sizeof(fcc_t);
+
+	memcpy_fromio(p, fep->fcc.fcccp, sizeof(fcc_c_t));
+	p = (char *)p + sizeof(fcc_c_t);
+
+	memcpy_fromio(p, fep->fcc.ep, sizeof(fcc_enet_t));
+
+	return 0;
+}
+
+int get_regs_len(struct net_device *dev)
+{
+	return sizeof(fcc_t) + sizeof(fcc_c_t) + sizeof(fcc_enet_t);
+}
+
+/* Some transmit errors cause the transmitter to shut
+ * down.  We now issue a restart transmit.  Since the
+ * errors close the BD and update the pointers, the restart
+ * _should_ pick up without having to reset any of our
+ * pointers either.  Also, To workaround 8260 device erratum 
+ * CPM37, we must disable and then re-enable the transmitter
+ * following a Late Collision, Underrun, or Retry Limit error.
+ */
+void tx_restart(struct net_device *dev)
+{
+	struct fs_enet_private *fep = netdev_priv(dev);
+	fcc_t *fccp = fep->fcc.fccp;
+
+	C32(fccp, fcc_gfmr, FCC_GFMR_ENT);
+	udelay(10);
+	S32(fccp, fcc_gfmr, FCC_GFMR_ENT);
+
+	fcc_cr_cmd(fep, 0x0C, CPM_CR_RESTART_TX);
+}
+
+/*************************************************************************/
+
+const struct fs_ops fs_fcc_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,
+};