[PATCH v3] WAN: Adding support for Lantiq PEF2256 E1 chipset (FALC56)
From: Christophe Leroy
Date: Fri Nov 22 2013 - 04:11:06 EST
The patch adds WAN support for Lantiq FALC56 - PEF2256 E1 Chipset.
Signed-off-by: Jerome Chantelauze <jerome.chantelauze.ext@xxxxxx>
Acked-by: Christophe Leroy <christophe.leroy@xxxxxx>
diff -urN a/drivers/net/wan/pef2256.c b/drivers/net/wan/pef2256.c
--- a/drivers/net/wan/pef2256.c 1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/net/wan/pef2256.c 2013-10-13 13:05:01.000000000 +0200
@@ -0,0 +1,1113 @@
+/* drivers/net/wan/pef2256.c : a PEF2256 HDLC driver for Linux
+ *
+ * This software may be used and distributed according to the terms of the
+ * GNU General Public License.
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+
+#include <linux/cache.h>
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <asm/irq.h>
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/hdlc.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/etherdevice.h>
+#include "pef2256.h"
+
+static int pef2256_open(struct net_device *netdev);
+static int pef2256_close(struct net_device *netdev);
+
+/* helper function - Read a register */
+static u8 pef2256_r8(struct pef2256_dev_priv *priv, u32 offset)
+{
+ return ioread8(priv->ioaddr + offset);
+}
+
+/* helper function - Write a value to a register */
+static void pef2256_w8(struct pef2256_dev_priv *priv, u32 offset, u8 val)
+{
+ iowrite8(val, priv->ioaddr + offset);
+}
+
+/* helper function - Clear bits in a register */
+static void pef2256_c8(struct pef2256_dev_priv *priv, u32 offset, u8 mask)
+{
+ u8 val = pef2256_r8(priv, offset);
+ iowrite8(val & ~mask, priv->ioaddr + offset);
+}
+
+/* helper function - Set bits in a register */
+static void pef2256_s8(struct pef2256_dev_priv *priv, u32 offset, u8 mask)
+{
+ u8 val = pef2256_r8(priv, offset);
+ iowrite8(val | mask, priv->ioaddr + offset);
+}
+
+static void config_hdlc_timeslot(struct pef2256_dev_priv *priv, int ts)
+{
+ static struct {
+ u32 ttr;
+ u32 rtr;
+ } regs[] = {
+ { TTR1, RTR1 },
+ { TTR2, RTR2 },
+ { TTR3, RTR3 },
+ { TTR4, RTR4 },
+ };
+ int cfg_bit = 1 << (31 - ts);
+ int reg_bit = 1 << (7 - (ts % 8));
+ int j = ts / 8;
+
+ if (j >= 4)
+ return;
+
+ if (priv->Tx_TS & cfg_bit)
+ pef2256_s8(priv, regs[j].ttr, 1 << reg_bit);
+
+ if (priv->Rx_TS & cfg_bit)
+ pef2256_s8(priv, regs[j].rtr, 1 << reg_bit);
+}
+
+
+/* Setting up HDLC channel */
+static void config_hdlc(struct pef2256_dev_priv *priv)
+{
+ int TS_idx;
+ u8 dummy;
+
+ /* Read to remove pending IT */
+ dummy = pef2256_r8(priv, ISR0);
+ dummy = pef2256_r8(priv, ISR1);
+ dummy = pef2256_r8(priv, ISR2);
+
+ /* Mask HDLC 1 Transmit IT */
+ pef2256_s8(priv, IMR1, IMR1_XPR);
+ pef2256_s8(priv, IMR1, IMR1_XDU);
+ pef2256_s8(priv, IMR1, IMR1_ALLS);
+
+ /* Mask HDLC 1 Receive IT */
+ pef2256_s8(priv, IMR0, IMR0_RPF);
+ pef2256_s8(priv, IMR0, IMR0_RME);
+ pef2256_s8(priv, IMR1, IMR1_RDO);
+
+ /* Mask errors IT */
+ pef2256_s8(priv, IMR0, IMR0_PDEN);
+ pef2256_s8(priv, IMR2, IMR2_LOS);
+ pef2256_s8(priv, IMR2, IMR2_AIS);
+
+ udelay(FALC_HW_CMD_DELAY_US);
+
+ /* MODE.HRAC = 0 (Receiver inactive)
+ * MODE.DIV = 0 (Data normal operation)
+ * for FALC V2.2 : MODE.HDLCI = 0 (normal operation)
+ * MODE.MDS2:0 = 100 (No address comparison)
+ * MODE.HRAC = 1 (Receiver active)
+ */
+ pef2256_w8(priv, MODE, 1 << 3);
+ /* CCR1.EITS = 1 (Enable internal Time Slot 31:0 Signaling)
+ * CCR1.XMFA = 0 (No transmit multiframe alignment)
+ * CCR1.RFT1:0 = 00 (RFIFO is 32 bytes)
+ * setting up Interframe Time Fill
+ * CCR1.ITF = 1 (Interframe Time Fill Continuous flag)
+ */
+ pef2256_w8(priv, CCR1, 0x10 | (1 << 3));
+ /* CCR2.XCRC = 0 (Transmit CRC ON)
+ * CCR2.RCRC = 0 (Receive CRC ON, no write in RFIFO)
+ * CCR2.RADD = 0 (No write address in RFIFO)
+ */
+ pef2256_w8(priv, CCR2, 0x00);
+
+ udelay(FALC_HW_CMD_DELAY_US);
+
+ /* MODE.HRAC = 0 (Receiver inactive)
+ * MODE.DIV = 0 (Data normal operation)
+ * for FALC V2.2 : MODE.HDLCI = 0 (normal operation)
+ * MODE.MDS2:0 = 100 (No address comparison)
+ * MODE.HRAC = 1 (Receiver active)
+ */
+ pef2256_w8(priv, MODE, 1 << 3);
+ /* CCR1.EITS = 1 (Enable internal Time Slot 31:0 Signaling)
+ * CCR1.XMFA = 0 (No transmit multiframe alignment)
+ * CCR1.RFT1:0 = 00 (RFIFO is 32 bytes)
+ * setting up Interframe Time Fill
+ * CCR1.ITF = 1 (Interframe Time Fill Continuous flag)
+ */
+ pef2256_w8(priv, CCR1, 0x10 | (1 << 3));
+ /* CCR2.XCRC = 0 (Transmit CRC ON)
+ * CCR2.RCRC = 0 (Receive CRC ON, no write in RFIFO)
+ * CCR2.RADD = 0 (No write address in RFIFO)
+ */
+ pef2256_w8(priv, CCR2, 0x00);
+
+ udelay(FALC_HW_CMD_DELAY_US);
+
+ /* MODE.HRAC = 0 (Receiver inactive)
+ * MODE.DIV = 0 (Data normal operation)
+ * for FALC V2.2 : MODE.HDLCI = 0 (normal operation)
+ * MODE.MDS2:0 = 100 (No address comparison)
+ * MODE.HRAC = 1 (Receiver active)
+ */
+ pef2256_w8(priv, MODE, 1 << 3);
+ /* CCR1.EITS = 1 (Enable internal Time Slot 31:0 Signaling)
+ * CCR1.XMFA = 0 (No transmit multiframe alignment)
+ * CCR1.RFT1:0 = 00 (RFIFO is 32 bytes)
+ * setting up Interframe Time Fill
+ * CCR1.ITF = 1 (Interframe Time Fill Continuous flag)
+ */
+ pef2256_w8(priv, CCR1, 0x10 | (1 << 3));
+ /* CCR2.XCRC = 0 (Transmit CRC ON)
+ * CCR2.RCRC = 0 (Receive CRC ON, no write in RFIFO)
+ * CCR2.RADD = 0 (No write address in RFIFO)
+ */
+ pef2256_w8(priv, CCR2, 0x00);
+
+ udelay(FALC_HW_CMD_DELAY_US);
+
+ /* Init Time Slot select */
+ pef2256_w8(priv, TTR1, 0x00);
+ pef2256_w8(priv, TTR2, 0x00);
+ pef2256_w8(priv, TTR3, 0x00);
+ pef2256_w8(priv, TTR4, 0x00);
+ pef2256_w8(priv, RTR1, 0x00);
+ pef2256_w8(priv, RTR2, 0x00);
+ pef2256_w8(priv, RTR3, 0x00);
+ pef2256_w8(priv, RTR4, 0x00);
+ /* Set selected TS bits */
+ /* Starting at TS 1, TS 0 is reserved */
+ for (TS_idx = 1; TS_idx < 32; TS_idx++)
+ config_hdlc_timeslot(priv, TS_idx);
+
+ udelay(FALC_HW_CMD_DELAY_US);
+
+ /* Unmask HDLC 1 Transmit IT */
+ pef2256_c8(priv, IMR1, IMR1_XPR);
+ pef2256_c8(priv, IMR1, IMR1_XDU);
+ pef2256_c8(priv, IMR1, IMR1_ALLS);
+
+ /* Unmask HDLC 1 Receive IT */
+ pef2256_c8(priv, IMR0, IMR0_RPF);
+ pef2256_c8(priv, IMR0, IMR0_RME);
+ pef2256_c8(priv, IMR1, IMR1_RDO);
+
+ /* Unmask errors IT */
+ pef2256_c8(priv, IMR0, IMR0_PDEN);
+ pef2256_c8(priv, IMR2, IMR2_LOS);
+ pef2256_c8(priv, IMR2, IMR2_AIS);
+}
+
+
+static void init_falc(struct pef2256_dev_priv *priv)
+{
+ int version;
+
+ /* Get controller version */
+ version = priv->component_id;
+
+ /* Init FALC56 */
+ /* RCLK output : DPLL clock, DCO-X enabled, DCO-X internal reference
+ * clock
+ */
+ pef2256_w8(priv, CMR1, 0x00);
+ /* SCLKR selected, SCLKX selected, receive synchro pulse sourced by
+ * SYPR, transmit synchro pulse sourced by SYPX
+ */
+ pef2256_w8(priv, CMR2, 0x00);
+ /* NRZ coding, no alarm simulation */
+ pef2256_w8(priv, FMR0, 0x00);
+ /* E1 double frame format, 2 Mbit/s system data rate, no AIS
+ * transmission to remote end or system interface, payload loop
+ * off, transmit remote alarm on
+ */
+ pef2256_w8(priv, FMR1, 0x00);
+ pef2256_w8(priv, FMR2, 0x02);
+ /* E1 default for LIM2 */
+ pef2256_w8(priv, LIM2, 0x20);
+ if (priv->mode == MASTER_MODE)
+ /* SEC input, active high */
+ pef2256_w8(priv, GPC1, 0x00);
+ else
+ /* FSC output, active high */
+ pef2256_w8(priv, GPC1, 0x40);
+ /* internal second timer, power on */
+ pef2256_w8(priv, GCR, 0x00);
+ /* slave mode, local loop off, mode short-haul */
+ if (version == VERSION_1_2)
+ pef2256_w8(priv, LIM0, 0x00);
+ else
+ pef2256_w8(priv, LIM0, 0x08);
+ /* analog interface selected, remote loop off */
+ pef2256_w8(priv, LIM1, 0x00);
+ if (version == VERSION_1_2) {
+ /* function of ports RP(A to D) : output receive sync pulse
+ * function of ports XP(A to D) : output transmit line clock
+ */
+ pef2256_w8(priv, PC1, 0x77);
+ pef2256_w8(priv, PC2, 0x77);
+ pef2256_w8(priv, PC3, 0x77);
+ pef2256_w8(priv, PC4, 0x77);
+ } else {
+ /* function of ports RP(A to D) : output high
+ * function of ports XP(A to D) : output high
+ */
+ pef2256_w8(priv, PC1, 0xAA);
+ pef2256_w8(priv, PC2, 0xAA);
+ pef2256_w8(priv, PC3, 0xAA);
+ pef2256_w8(priv, PC4, 0xAA);
+ }
+ /* function of port RPA : input SYPR
+ * function of port XPA : input SYPX
+ */
+ pef2256_w8(priv, PC1, 0x00);
+ /* SCLKR, SCLKX, RCLK configured to inputs,
+ * XFMS active low, CLK1 and CLK2 pin configuration
+ */
+ pef2256_w8(priv, PC5, 0x00);
+ pef2256_w8(priv, PC6, 0x00);
+ /* the receive clock offset is cleared
+ * the receive time slot offset is cleared
+ */
+ pef2256_w8(priv, RC0, 0x00);
+ pef2256_w8(priv, RC1, 0x9C);
+ /* 2.048 MHz system clocking rate, receive buffer 2 frames, transmit
+ * buffer bypass, data sampled and transmitted on the falling edge of
+ * SCLKR/X, automatic freeze signaling, data is active in the first
+ * channel phase
+ */
+ pef2256_w8(priv, SIC1, 0x00);
+ pef2256_w8(priv, SIC2, 0x00);
+ pef2256_w8(priv, SIC3, 0x00);
+ /* channel loop-back and single frame mode are disabled */
+ pef2256_w8(priv, LOOP, 0x00);
+ /* all bits of the transmitted service word are cleared */
+ pef2256_w8(priv, XSW, 0x1F);
+ /* spare bit values are cleared */
+ pef2256_w8(priv, XSP, 0x00);
+ /* no transparent mode active */
+ pef2256_w8(priv, TSWM, 0x00);
+ /* the transmit clock offset is cleared
+ * the transmit time slot offset is cleared
+ */
+ pef2256_w8(priv, XC0, 0x00);
+ pef2256_w8(priv, XC1, 0x9C);
+ /* transmitter in tristate mode */
+ pef2256_w8(priv, XPM2, 0x40);
+ /* transmit pulse mask */
+ if (version != VERSION_1_2)
+ pef2256_w8(priv, XPM0, 0x9C);
+
+ if (version == VERSION_1_2) {
+ /* master clock is 16,384 MHz (flexible master clock) */
+ pef2256_w8(priv, GCM2, 0x58);
+ pef2256_w8(priv, GCM3, 0xD2);
+ pef2256_w8(priv, GCM4, 0xC2);
+ pef2256_w8(priv, GCM5, 0x07);
+ pef2256_w8(priv, GCM6, 0x10);
+ } else {
+ /* master clock is 16,384 MHz (flexible master clock) */
+ pef2256_w8(priv, GCM2, 0x18);
+ pef2256_w8(priv, GCM3, 0xFB);
+ pef2256_w8(priv, GCM4, 0x0B);
+ pef2256_w8(priv, GCM5, 0x01);
+ pef2256_w8(priv, GCM6, 0x0B);
+ pef2256_w8(priv, GCM7, 0xDB);
+ pef2256_w8(priv, GCM8, 0xDF);
+ }
+
+ /* master mode */
+ if (priv->mode == MASTER_MODE)
+ pef2256_s8(priv, LIM0, LIM0_MAS);
+
+ /* transmit line in normal operation */
+ pef2256_c8(priv, XPM2, XPM2_XLT);
+
+ if (version == VERSION_1_2) {
+ /* receive input threshold = 0,21V */
+ pef2256_s8(priv, LIM1, LIM1_RIL0);
+ pef2256_c8(priv, LIM1, LIM1_RIL1);
+ pef2256_s8(priv, LIM1, LIM1_RIL2);
+ } else {
+ /* receive input threshold = 0,21V */
+ pef2256_c8(priv, LIM1, LIM1_RIL0);
+ pef2256_c8(priv, LIM1, LIM1_RIL1);
+ pef2256_s8(priv, LIM1, LIM1_RIL2);
+ }
+ /* transmit line coding = HDB3 */
+ pef2256_s8(priv, FMR0, FMR0_XC0);
+ pef2256_s8(priv, FMR0, FMR0_XC1);
+ /* receive line coding = HDB3 */
+ pef2256_s8(priv, FMR0, FMR0_RC0);
+ pef2256_s8(priv, FMR0, FMR0_RC1);
+ /* detection of LOS alarm = 176 pulses (soit (10 + 1) * 16) */
+ pef2256_w8(priv, PCD, 10);
+ /* recovery of LOS alarm = 22 pulses (soit 21 + 1) */
+ pef2256_w8(priv, PCR, 21);
+ /* DCO-X center frequency => CMR2.DCOXC */
+ pef2256_s8(priv, CMR2, CMR2_DCOXC);
+ if (priv->mode == SLAVE_MODE) {
+ /* select RCLK source = 2M */
+ pef2256_c8(priv, CMR1, CMR1_RS0);
+ pef2256_s8(priv, CMR1, CMR1_RS1);
+ /* disable switching RCLK -> SYNC */
+ pef2256_s8(priv, CMR1, CMR1_DCS);
+ }
+ if (version != VERSION_1_2)
+ /* during inactive channel phase RDO into tri-state mode */
+ pef2256_s8(priv, SIC3, 1 << 5);
+ if (!strcmp(priv->rising_edge_sync_pulse, "transmit")) {
+ /* rising edge sync pulse transmit */
+ pef2256_c8(priv, SIC3, SIC3_RESR);
+ pef2256_s8(priv, SIC3, SIC3_RESX);
+ } else {
+ /* rising edge sync pulse receive */
+ pef2256_c8(priv, SIC3, SIC3_RESX);
+ pef2256_s8(priv, SIC3, SIC3_RESR);
+ }
+ /* transmit offset counter = 4
+ * => XC0.XCO10:8 = 000 (bits 2, 1 et 0);
+ * XC1.XCO7:0 = 4 (bits 7 ... 0)
+ */
+ pef2256_w8(priv, XC1, 4);
+ /* receive offset counter = 4
+ * => RC0.RCO10:8 = 000 (bits 2, 1 et 0);
+ * RC1.RCO7:0 = 4 (bits 7 ... 0)
+ */
+ pef2256_w8(priv, RC1, 4);
+
+ /* Clocking rate for FALC56 */
+
+ /* Nothing to do for clocking rate 2M */
+
+ /* clocking rate 4M */
+ if (priv->clock_rate == CLOCK_RATE_4M)
+ pef2256_s8(priv, SIC1, SIC1_SSC0);
+
+ /* clocking rate 8M */
+ if (priv->clock_rate == CLOCK_RATE_8M)
+ pef2256_s8(priv, SIC1, SIC1_SSC1);
+
+ /* clocking rate 16M */
+ if (priv->clock_rate == CLOCK_RATE_16M) {
+ pef2256_s8(priv, SIC1, SIC1_SSC0);
+ pef2256_s8(priv, SIC1, SIC1_SSC1);
+ }
+
+ /* data rate for FALC56 */
+
+ /* Nothing to do for data rate 2M on the system data bus */
+
+ /* data rate 4M on the system data bus */
+ if (priv->data_rate == DATA_RATE_4M)
+ pef2256_s8(priv, FMR1, FMR1_SSD0);
+
+ /* data rate 8M on the system data bus */
+ if (priv->data_rate == DATA_RATE_8M)
+ pef2256_s8(priv, SIC1, SIC1_SSD1);
+
+ /* data rate 16M on the system data bus */
+ if (priv->data_rate == DATA_RATE_16M) {
+ pef2256_s8(priv, FMR1, FMR1_SSD0);
+ pef2256_s8(priv, SIC1, SIC1_SSD1);
+ }
+
+ /* channel phase for FALC56 */
+
+ /* Nothing to do for channel phase 1 */
+
+ if (priv->channel_phase == CHANNEL_PHASE_2)
+ pef2256_s8(priv, SIC2, SIC2_SICS0);
+
+ if (priv->channel_phase == CHANNEL_PHASE_3)
+ pef2256_s8(priv, SIC2, SIC2_SICS1);
+
+ if (priv->channel_phase == CHANNEL_PHASE_4) {
+ pef2256_s8(priv, SIC2, SIC2_SICS0);
+ pef2256_s8(priv, SIC2, SIC2_SICS1);
+ }
+
+ if (priv->channel_phase == CHANNEL_PHASE_5)
+ pef2256_s8(priv, SIC2, SIC2_SICS2);
+
+ if (priv->channel_phase == CHANNEL_PHASE_6) {
+ pef2256_s8(priv, SIC2, SIC2_SICS0);
+ pef2256_s8(priv, SIC2, SIC2_SICS2);
+ }
+
+ if (priv->channel_phase == CHANNEL_PHASE_7) {
+ pef2256_s8(priv, SIC2, SIC2_SICS1);
+ pef2256_s8(priv, SIC2, SIC2_SICS2);
+ }
+
+ if (priv->channel_phase == CHANNEL_PHASE_8) {
+ pef2256_s8(priv, SIC2, SIC2_SICS0);
+ pef2256_s8(priv, SIC2, SIC2_SICS1);
+ pef2256_s8(priv, SIC2, SIC2_SICS2);
+ }
+
+ if (priv->mode == SLAVE_MODE)
+ /* transmit buffer size = 2 frames */
+ pef2256_s8(priv, SIC1, SIC1_XBS1);
+
+ /* transmit in multiframe */
+ pef2256_s8(priv, FMR1, FMR1_XFS);
+ /* receive in multiframe */
+ pef2256_s8(priv, FMR2, FMR2_RFS1);
+ /* Automatic transmission of submultiframe status */
+ pef2256_s8(priv, XSP, XSP_AXS);
+
+ /* error counter mode toutes les 1s */
+ pef2256_s8(priv, FMR1, FMR1_ECM);
+ /* error counter mode COFA => GCR.ECMC = 1 (bit 4) */
+ pef2256_s8(priv, GCR, GCR_ECMC);
+ /* errors in service words with no influence */
+ pef2256_s8(priv, RC0, RC0_SWD);
+ /* 4 consecutive incorrect FAS = loss of sync */
+ pef2256_s8(priv, RC0, RC0_ASY4);
+ /* Si-Bit in service word from XDI */
+ pef2256_s8(priv, XSW, XSW_XSIS);
+ /* Si-Bit in FAS word from XDI */
+ pef2256_s8(priv, XSP, XSP_XSIF);
+
+ /* port RCLK is output */
+ pef2256_s8(priv, PC5, PC5_CRP);
+ /* visibility of the masked interrupts */
+ pef2256_s8(priv, GCR, GCR_VIS);
+ /* reset lines
+ * => CMDR.RRES = 1 (bit 6); CMDR.XRES = 1 (bit 4);
+ * CMDR.SRES = 1 (bit 0)
+ */
+ pef2256_w8(priv, CMDR, 0x51);
+}
+
+static ssize_t fs_attr_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
+
+ return sprintf(buf, "%d\n", priv->mode);
+}
+
+
+static ssize_t fs_attr_mode_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
+ long int value;
+ int ret = kstrtol(buf, 10, &value);
+ int reconfigure = (value != priv->mode);
+
+ if (value != MASTER_MODE && value != SLAVE_MODE)
+ ret = -EINVAL;
+
+ if (ret < 0)
+ netdev_info(ndev, "Invalid mode (0 or 1 expected\n");
+ else {
+ priv->mode = value;
+ if (reconfigure && netif_carrier_ok(ndev))
+ init_falc(priv);
+ }
+
+ return strnlen(buf, count);
+}
+
+static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, fs_attr_mode_show,
+ fs_attr_mode_store);
+
+
+
+static ssize_t fs_attr_Tx_TS_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
+
+ return sprintf(buf, "0x%08x\n", priv->Tx_TS);
+}
+
+
+static ssize_t fs_attr_Tx_TS_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
+ unsigned long value;
+ int ret = kstrtoul(buf, 16, (long int *)&value);
+ int reconfigure = (value != priv->mode);
+
+ /* TS 0 is reserved */
+ if (ret < 0 || value > TS_0)
+ ret = -EINVAL;
+
+ if (ret < 0)
+ netdev_info(ndev, "Invalid Tx_TS (hex number > 0 and < 0x80000000 expected\n");
+ else {
+ priv->Tx_TS = value;
+ if (reconfigure && netif_carrier_ok(ndev))
+ config_hdlc(priv);
+ }
+
+ return strnlen(buf, count);
+}
+
+static DEVICE_ATTR(Tx_TS, S_IRUGO | S_IWUSR, fs_attr_Tx_TS_show,
+ fs_attr_Tx_TS_store);
+
+
+static ssize_t fs_attr_Rx_TS_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
+
+ return sprintf(buf, "0x%08x\n", priv->Rx_TS);
+}
+
+
+static ssize_t fs_attr_Rx_TS_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
+ unsigned long value;
+ int ret = kstrtoul(buf, 16, &value);
+ int reconfigure = (value != priv->mode);
+
+ /* TS 0 is reserved */
+ if (ret < 0 || value > TS_0)
+ ret = -EINVAL;
+
+ if (ret < 0)
+ netdev_info(ndev, "Invalid Rx_TS (hex number > 0 and < 0x80000000 expected\n");
+ else {
+ priv->Rx_TS = value;
+ if (reconfigure && netif_carrier_ok(ndev))
+ config_hdlc(priv);
+ }
+
+ return strnlen(buf, count);
+}
+
+static DEVICE_ATTR(Rx_TS, S_IRUGO | S_IWUSR, fs_attr_Rx_TS_show,
+ fs_attr_Rx_TS_store);
+
+
+static void pef2256_fifo_ack(struct pef2256_dev_priv *priv)
+{
+ pef2256_s8(priv, CMDR, 1 << 7);
+}
+
+
+static void pef2256_rx(struct pef2256_dev_priv *priv)
+{
+ int idx;
+
+ /* RDO has been received -> wait for RME */
+ if (priv->stats.rx_bytes == -1) {
+ pef2256_fifo_ack(priv);
+
+ if (priv->r_isr0 & ISR0_RME)
+ priv->stats.rx_bytes = 0;
+
+ return;
+ }
+
+ /* RPF : a block is available in the receive FIFO */
+ if (priv->r_isr0 & ISR0_RPF) {
+ for (idx = 0; idx < 32; idx++)
+ priv->rx_buff[priv->stats.rx_bytes + idx] =
+ pef2256_r8(priv, RFIFO + (idx & 1));
+
+ pef2256_fifo_ack(priv);
+
+ priv->stats.rx_bytes += 32;
+ }
+
+ /* RME : Message end : Read the receive FIFO */
+ if (priv->r_isr0 & ISR0_RME) {
+ /* Get size of last block */
+ int size = pef2256_r8(priv, RBCL) & 0x1F;
+
+ /* Read last block */
+ for (idx = 0; idx < size; idx++)
+ priv->rx_buff[priv->stats.rx_bytes + idx] =
+ pef2256_r8(priv, RFIFO + (idx & 1));
+
+ pef2256_fifo_ack(priv);
+
+ priv->stats.rx_bytes += size;
+
+ /* Packet received */
+ if (priv->stats.rx_bytes > 0) {
+ struct sk_buff *skb =
+ dev_alloc_skb(priv->stats.rx_bytes);
+
+ if (!skb) {
+ priv->stats.rx_bytes = 0;
+ priv->netdev->stats.rx_dropped++;
+ return;
+ }
+ memcpy(skb->data, priv->rx_buff, priv->stats.rx_bytes);
+ skb_put(skb, priv->stats.rx_bytes);
+ priv->stats.rx_bytes = 0;
+ skb->protocol = hdlc_type_trans(skb, priv->netdev);
+ priv->netdev->stats.rx_packets++;
+ priv->netdev->stats.rx_bytes += skb->len;
+ netif_rx(skb);
+ }
+ }
+}
+
+
+static void pef2256_tx(struct pef2256_dev_priv *priv)
+{
+ int idx, size;
+ u8 *tx_buff = priv->tx_skb->data;
+
+ /* ALLS : transmit all done */
+ if (priv->r_isr1 & ISR1_ALLS) {
+ priv->netdev->stats.tx_packets++;
+ priv->netdev->stats.tx_bytes += priv->tx_skb->len;
+ priv->tx_skb = NULL;
+ priv->stats.tx_bytes = 0;
+ netif_wake_queue(priv->netdev);
+ } else
+ /* XPR : write a new block in transmit FIFO */
+ if (priv->stats.tx_bytes < priv->tx_skb->len) {
+ size = priv->tx_skb->len - priv->stats.tx_bytes;
+ if (size > 32)
+ size = 32;
+
+ for (idx = 0; idx < size; idx++)
+ pef2256_w8(priv, XFIFO + (idx & 1),
+ tx_buff[priv->stats.tx_bytes + idx]);
+
+ priv->stats.tx_bytes += size;
+
+ if (priv->stats.tx_bytes == priv->tx_skb->len)
+ pef2256_s8(priv, CMDR, (1 << 3) | (1 << 1));
+ else
+ pef2256_s8(priv, CMDR, 1 << 3);
+ }
+}
+
+static void pef2256_errors(struct pef2256_dev_priv *priv)
+{
+ if (pef2256_r8(priv, FRS1) & FRS1_PDEN ||
+ pef2256_r8(priv, FRS0) & (FRS0_LOS | FRS0_AIS)) {
+ if (priv->tx_skb) {
+ priv->netdev->stats.tx_errors++;
+ priv->tx_skb = NULL;
+ priv->stats.tx_bytes = 0;
+ netif_wake_queue(priv->netdev);
+ }
+ if (priv->stats.rx_bytes > 0) {
+ priv->netdev->stats.rx_errors++;
+ priv->stats.rx_bytes = 0;
+ }
+ netif_carrier_off(priv->netdev);
+ } else
+ netif_carrier_on(priv->netdev);
+}
+
+static irqreturn_t pef2256_irq(int irq, void *dev_priv)
+{
+ struct pef2256_dev_priv *priv = (struct pef2256_dev_priv *)dev_priv;
+ u8 r_gis;
+
+ r_gis = pef2256_r8(priv, GIS);
+
+ priv->r_isr0 = priv->r_isr1 = 0;
+
+ /* We only care about ISR0, ISR1 and ISR2 */
+ /* ISR0 */
+ if (r_gis & GIS_ISR0)
+ priv->r_isr0 =
+ pef2256_r8(priv, ISR0) & ~(pef2256_r8(priv, IMR0));
+
+ /* ISR1 */
+ if (r_gis & GIS_ISR1)
+ priv->r_isr1 =
+ pef2256_r8(priv, ISR1) & ~(pef2256_r8(priv, IMR1));
+
+ /* ISR2 */
+ if (r_gis & GIS_ISR2)
+ priv->r_isr2 =
+ pef2256_r8(priv, ISR2) & ~(pef2256_r8(priv, IMR2));
+
+ /* An error status has changed */
+ if (priv->r_isr0 & ISR0_PDEN || priv->r_isr2 & ISR2_LOS ||
+ priv->r_isr2 & ISR2_AIS)
+ pef2256_errors(priv);
+
+ /* RDO : Receive data overflow -> RX error */
+ if (priv->r_isr1 & ISR1_RDO) {
+ pef2256_fifo_ack(priv);
+ priv->netdev->stats.rx_errors++;
+ /* RME received ? */
+ if (priv->r_isr0 & ISR0_RME)
+ priv->stats.rx_bytes = 0;
+ else
+ priv->stats.rx_bytes = -1;
+ } else
+ /* RPF or RME : FIFO received */
+ if (priv->r_isr0 & (ISR0_RPF | ISR0_RME))
+ pef2256_rx(priv);
+
+ /* XDU : Transmit data underrun -> TX error */
+ if (priv->r_isr1 & ISR1_XDU) {
+ priv->netdev->stats.tx_errors++;
+ priv->tx_skb = NULL;
+ netif_wake_queue(priv->netdev);
+ } else
+ /* XPR or ALLS : FIFO sent */
+ if (priv->r_isr1 & (ISR1_XPR | ISR1_ALLS))
+ pef2256_tx(priv);
+
+ return IRQ_HANDLED;
+}
+
+
+static int pef2256_open(struct net_device *netdev)
+{
+ struct pef2256_dev_priv *priv = dev_to_hdlc(netdev)->priv;
+ int ret;
+ u8 dummy;
+
+ if (priv->component_id == VERSION_UNDEF) {
+ dev_err(priv->dev, "Composant ident (%X/%X) = %d\n",
+ pef2256_r8(priv, VSTR), pef2256_r8(priv, WID),
+ priv->component_id);
+ return -ENODEV;
+ }
+
+ ret = hdlc_open(netdev);
+ if (ret)
+ return ret;
+
+ /* We mask HDLC 1 receive/transmit IT to prevent the component sending
+ * such interrupts before it is initialized and configured.
+ */
+
+ /* Read to remove pending IT */
+ dummy = pef2256_r8(priv, ISR0);
+ dummy = pef2256_r8(priv, ISR1);
+ dummy = pef2256_r8(priv, ISR2);
+
+ /* Mask HDLC 1 Transmit IT */
+ pef2256_s8(priv, IMR1, IMR1_XPR);
+ pef2256_s8(priv, IMR1, IMR1_XDU);
+ pef2256_s8(priv, IMR1, IMR1_ALLS);
+
+ /* Mask HDLC 1 Receive IT */
+ pef2256_s8(priv, IMR0, IMR0_RPF);
+ pef2256_s8(priv, IMR0, IMR0_RME);
+ pef2256_s8(priv, IMR1, IMR1_RDO);
+
+ /* Mask errors IT */
+ pef2256_s8(priv, IMR0, IMR0_PDEN);
+ pef2256_s8(priv, IMR2, IMR2_LOS);
+ pef2256_s8(priv, IMR2, IMR2_AIS);
+
+ ret = request_irq(priv->irq, pef2256_irq, 0, "e1-wan", priv);
+ if (ret) {
+ dev_err(priv->dev, "Cannot request irq. Device seems busy.\n");
+ hdlc_close(netdev);
+ return -EBUSY;
+ }
+
+ init_falc(priv);
+
+ priv->tx_skb = NULL;
+ priv->stats.rx_bytes = 0;
+
+ config_hdlc(priv);
+
+ netif_start_queue(netdev);
+ pef2256_errors(priv);
+
+ return 0;
+}
+
+
+static int pef2256_close(struct net_device *netdev)
+{
+ struct pef2256_dev_priv *priv = dev_to_hdlc(netdev)->priv;
+
+ netif_stop_queue(netdev);
+ netif_carrier_off(netdev);
+ hdlc_close(netdev);
+ free_irq(priv->irq, priv);
+
+ return 0;
+}
+
+
+
+static netdev_tx_t pef2256_start_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct pef2256_dev_priv *priv = dev_to_hdlc(netdev)->priv;
+ int idx, size;
+ u8 *tx_buff = skb->data;
+
+ priv->tx_skb = skb;
+ priv->stats.tx_bytes = 0;
+
+ size = priv->tx_skb->len - priv->stats.tx_bytes;
+ if (size > 32)
+ size = 32;
+
+ for (idx = 0; idx < size; idx++)
+ pef2256_w8(priv, XFIFO + (idx & 1),
+ tx_buff[priv->stats.tx_bytes + idx]);
+
+ priv->stats.tx_bytes += size;
+
+ pef2256_s8(priv, CMDR, 1 << 3);
+ if (priv->stats.tx_bytes == priv->tx_skb->len)
+ pef2256_s8(priv, CMDR, 1 << 1);
+
+ netif_stop_queue(netdev);
+ return NETDEV_TX_OK;
+}
+
+static const struct net_device_ops pef2256_ops = {
+ .ndo_open = pef2256_open,
+ .ndo_stop = pef2256_close,
+ .ndo_change_mtu = hdlc_change_mtu,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_do_ioctl = hdlc_ioctl,
+};
+
+
+static int pef2256_hdlc_attach(struct net_device *netdev,
+ unsigned short encoding, unsigned short parity)
+{
+ struct pef2256_dev_priv *priv = dev_to_hdlc(netdev)->priv;
+
+ if (encoding != ENCODING_NRZ &&
+ encoding != ENCODING_NRZI &&
+ encoding != ENCODING_FM_MARK &&
+ encoding != ENCODING_FM_SPACE &&
+ encoding != ENCODING_MANCHESTER)
+ return -EINVAL;
+
+ if (parity != PARITY_NONE &&
+ parity != PARITY_CRC16_PR0_CCITT &&
+ parity != PARITY_CRC16_PR1_CCITT &&
+ parity != PARITY_CRC32_PR0_CCITT &&
+ parity != PARITY_CRC32_PR1_CCITT)
+ return -EINVAL;
+
+ priv->encoding = encoding;
+ priv->parity = parity;
+ return 0;
+}
+
+
+static int pef2256_probe(struct platform_device *pdev)
+{
+ struct pef2256_dev_priv *priv;
+ int ret = -ENOMEM;
+ struct net_device *netdev;
+ hdlc_device *hdlc;
+ struct device_node *np = (&pdev->dev)->of_node;
+ const char *str_data;
+
+ if (!pdev->dev.of_node)
+ return -EINVAL;
+
+ dev_err(&pdev->dev, "Found PEF2256\n");
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return ret;
+
+ priv->dev = &pdev->dev;
+
+ if (of_property_read_u32(np, "clock-rate", &priv->clock_rate)) {
+ dev_err(&pdev->dev, "failed to read clock-rate -> using 8Mhz\n");
+ priv->clock_rate = CLOCK_RATE_8M;
+ }
+
+ if (of_property_read_u32(np, "data-rate", &priv->data_rate)) {
+ dev_err(&pdev->dev, "failed to read data-rate -> using 8Mb\n");
+ priv->data_rate = DATA_RATE_8M;
+ }
+
+ if (of_property_read_u32(np, "channel-phase", &priv->channel_phase)) {
+ dev_err(&pdev->dev, "failed to read channel phase -> using 0\n");
+ priv->channel_phase = CHANNEL_PHASE_0;
+ }
+
+ if (of_property_read_string(np, "rising-edge-sync-pulse", &str_data)) {
+ dev_err(&pdev->dev,
+"failed to read rising edge sync pulse -> using \"transmit\"\n");
+ strcpy(priv->rising_edge_sync_pulse, "transmit");
+ } else if (strcmp(str_data, "transmit") &&
+ strcmp(str_data, "receive")) {
+ dev_err(&pdev->dev,
+"invalid rising edge sync pulse \"%s\" -> using \"transmit\"\n", str_data);
+ strcpy(priv->rising_edge_sync_pulse, "transmit");
+ } else
+ strncpy(priv->rising_edge_sync_pulse, str_data, 10);
+
+ priv->irq = platform_get_irq(pdev, 0);
+ if (!priv->irq) {
+ dev_err(priv->dev, "no irq defined\n");
+ goto free_priv;
+ }
+
+ priv->ioaddr = of_iomap(np, 0);
+ if (!priv->ioaddr) {
+ dev_err(&pdev->dev, "of_iomap failed\n");
+ goto free_priv;
+ }
+
+ /* Get the component Id */
+ priv->component_id = VERSION_UNDEF;
+ if (pef2256_r8(priv, VSTR) == 0x00) {
+ if ((pef2256_r8(priv, WID) & WID_IDENT_1) ==
+ WID_IDENT_1_2)
+ priv->component_id = VERSION_1_2;
+ } else if (pef2256_r8(priv, VSTR) == 0x05) {
+ if ((pef2256_r8(priv, WID) & WID_IDENT_2) ==
+ WID_IDENT_2_1)
+ priv->component_id = VERSION_2_1;
+ else if ((pef2256_r8(priv, WID) & WID_IDENT_2) ==
+ WID_IDENT_2_2)
+ priv->component_id = VERSION_2_2;
+ }
+
+ priv->tx_skb = NULL;
+
+ /* Default settings ; Rx and Tx use TS 1, mode = MASTER */
+ priv->Rx_TS = 0x40000000;
+ priv->Tx_TS = 0x40000000;
+ priv->mode = 0;
+
+ netdev = alloc_hdlcdev(priv);
+ if (!netdev) {
+ dev_err(&pdev->dev, "alloc_hdlcdev failed\n");
+ ret = -ENOMEM;
+ goto free_regs;
+ }
+
+ priv->netdev = netdev;
+ hdlc = dev_to_hdlc(netdev);
+ netdev->netdev_ops = &pef2256_ops;
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+ hdlc->attach = pef2256_hdlc_attach;
+ hdlc->xmit = pef2256_start_xmit;
+
+ dev_set_drvdata(&pdev->dev, netdev);
+
+ ret = register_hdlc_device(netdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Can't register hdlc device\n");
+ goto free_dev;
+ }
+
+ /* These files are required to configure HDLC : mode
+ * (master or slave), time slots used to transmit and
+ * receive data. They are mandatory.
+ */
+ ret = device_create_file(priv->dev, &dev_attr_mode);
+ ret |= device_create_file(priv->dev, &dev_attr_Tx_TS);
+ ret |= device_create_file(priv->dev, &dev_attr_Rx_TS);
+
+ if (ret)
+ goto remove_files;
+
+ return 0;
+
+remove_files:
+ device_remove_file(priv->dev, &dev_attr_Tx_TS);
+ device_remove_file(priv->dev, &dev_attr_Rx_TS);
+ device_remove_file(priv->dev, &dev_attr_mode);
+
+ unregister_hdlc_device(priv->netdev);
+free_dev:
+ free_netdev(priv->netdev);
+free_regs:
+ iounmap(priv->ioaddr);
+free_priv:;
+ kfree(priv);
+
+ return ret;
+}
+
+
+static int pef2256_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = dev_get_drvdata(&pdev->dev);
+ struct pef2256_dev_priv *priv = dev_to_hdlc(ndev)->priv;
+
+
+ device_remove_file(priv->dev, &dev_attr_Tx_TS);
+ device_remove_file(priv->dev, &dev_attr_Rx_TS);
+ device_remove_file(priv->dev, &dev_attr_mode);
+
+ unregister_hdlc_device(priv->netdev);
+
+ free_netdev(priv->netdev);
+
+ iounmap(priv->ioaddr);
+
+ kfree(priv);
+
+ kfree(pdev);
+ return 0;
+}
+
+static const struct of_device_id pef2256_match[] = {
+ {
+ .compatible = "lantiq,pef2256",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, pef2256_match);
+
+
+static struct platform_driver pef2256_driver = {
+ .probe = pef2256_probe,
+ .remove = pef2256_remove,
+ .driver = {
+ .name = "pef2256",
+ .owner = THIS_MODULE,
+ .of_match_table = pef2256_match,
+ },
+};
+
+
+module_platform_driver(pef2256_driver);
+
+/* GENERAL INFORMATIONS */
+MODULE_AUTHOR("CHANTELAUZE Jerome - April 2013");
+MODULE_VERSION("0.1");
+MODULE_DESCRIPTION("Lantiq PEF 2256 E1 Controller");
+MODULE_LICENSE("GPL");
diff -urN a/drivers/net/wan/pef2256.h b/drivers/net/wan/pef2256.h
--- a/drivers/net/wan/pef2256.h 1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/net/wan/pef2256.h 2013-10-13 13:06:00.000000000 +0200
@@ -0,0 +1,327 @@
+/* drivers/net/wan/pef2256.c : a PEF2256 HDLC driver for Linux
+ *
+ * This software may be used and distributed according to the terms of the
+ * GNU General Public License.
+ */
+
+#ifndef _PEF2256_H
+#define _PEF2256_H
+
+#define MASTER_MODE 0
+#define SLAVE_MODE 1
+
+#define CHANNEL_PHASE_0 0
+#define CHANNEL_PHASE_1 1
+#define CHANNEL_PHASE_2 2
+#define CHANNEL_PHASE_3 3
+#define CHANNEL_PHASE_4 4
+#define CHANNEL_PHASE_5 5
+#define CHANNEL_PHASE_6 6
+#define CHANNEL_PHASE_7 7
+#define CHANNEL_PHASE_8 8
+
+#define CLOCK_RATE_2M 2
+#define CLOCK_RATE_4M 4
+#define CLOCK_RATE_8M 8
+#define CLOCK_RATE_16M 16
+
+#define DATA_RATE_2M 2
+#define DATA_RATE_4M 4
+#define DATA_RATE_8M 8
+#define DATA_RATE_16M 16
+
+#define RX_TIMEOUT 500
+
+#define TS_0 0x80000000
+
+/* The hardware requires a delay up to 2*32*125 usec to take commands
+ * into account
+ */
+#define FALC_HW_CMD_DELAY_US (2 * 32 * 125)
+
+enum versions {
+ VERSION_UNDEF = 0,
+ VERSION_1_2 = 0x12,
+ VERSION_2_1 = 0x21,
+ VERSION_2_2 = 0x22,
+};
+
+#define WID_IDENT_1 0x03
+#define WID_IDENT_1_2 0x03
+#define WID_IDENT_2 0xC0
+#define WID_IDENT_2_1 0x00
+#define WID_IDENT_2_2 0x40
+
+/* Registers' bits */
+#define GIS_ISR0 1
+#define GIS_ISR1 (1 << 1)
+#define GIS_ISR2 (1 << 2)
+#define ISR0_RPF 1
+#define ISR0_PDEN (1 << 1)
+#define ISR0_RME (1 << 7)
+#define ISR1_XPR 1
+#define ISR1_XDU (1 << 4)
+#define ISR1_ALLS (1 << 5)
+#define ISR1_RDO (1 << 6)
+#define ISR2_LOS (1 << 2)
+#define ISR2_AIS (1 << 3)
+#define IMR0_RPF 1
+#define IMR0_PDEN 1
+#define IMR0_RME (1 << 7)
+#define IMR1_XPR 1
+#define IMR1_XDU (1 << 4)
+#define IMR1_ALLS (1 << 5)
+#define IMR1_RDO (1 << 6)
+#define IMR2_LOS (1 << 2)
+#define IMR2_AIS (1 << 3)
+#define LIM0_MAS 1
+#define LIM1_RIL0 (1 << 4)
+#define LIM1_RIL1 (1 << 5)
+#define LIM1_RIL2 (1 << 6)
+#define FMR0_RC0 (1 << 4)
+#define FMR0_RC1 (1 << 5)
+#define FMR0_XC0 (1 << 6)
+#define FMR0_XC1 (1 << 7)
+#define FMR1_SSD0 (1 << 1)
+#define FMR1_ECM (1 << 2)
+#define FMR1_XFS (1 << 3)
+#define FMR2_RFS0 (1 << 6)
+#define FMR2_RFS1 (1 << 7)
+#define FRS0_AIS (1 << 7)
+#define FRS0_LOS (1 << 6)
+#define FRS1_PDEN (1 << 6)
+#define CMR2_DCOXC (1 << 5)
+#define CMR1_DCS (1 << 3)
+#define CMR1_RS0 (1 << 4)
+#define CMR1_RS1 (1 << 5)
+#define SIC3_RESR (1 << 2)
+#define SIC3_RESX (1 << 3)
+#define SIC2_SICS0 (1 << 1)
+#define SIC2_SICS1 (1 << 2)
+#define SIC2_SICS2 (1 << 3)
+#define SIC1_XBS0 (1 << 1)
+#define SIC1_XBS1 (1 << 1)
+#define SIC1_SSC0 (1 << 3)
+#define SIC1_SSD1 (1 << 6)
+#define SIC1_SSC1 (1 << 7)
+#define XSP_XSIF (1 << 2)
+#define XSP_AXS (1 << 3)
+#define GCR_ECMC (1 << 4)
+#define GCR_SCI (1 << 6)
+#define GCR_VIS (1 << 7)
+#define RC0_SWD (1 << 7)
+#define RC0_ASY4 (1 << 6)
+#define XSW_XSIS (1 << 7)
+#define PC5_CRP 1
+#define XPM2_XLT (1 << 6)
+
+struct pef2256_dev_priv {
+ struct sk_buff *tx_skb;
+ struct device *dev;
+
+ void __iomem *ioaddr;
+ int component_id;
+ int mode; /* MASTER or SLAVE */
+ int board_type;
+ int channel_phase;
+ int clock_rate;
+ int data_rate;
+ char rising_edge_sync_pulse[10];
+
+ u8 rx_buff[2048];
+
+ struct net_device_stats stats;
+
+ u32 Tx_TS; /* Transmit Time Slots */
+ u32 Rx_TS; /* Receive Time Slots */
+
+ unsigned short encoding;
+ unsigned short parity;
+ struct net_device *netdev;
+
+ int irq;
+
+ u8 r_isr0; /* ISR0 register */
+ u8 r_isr1; /* ISR1 register */
+ u8 r_isr2; /* ISR2 register */
+};
+
+
+/* Framer E1 registers offsets */
+#define XFIFO 0x00 /* 0x00/0x01 Tx FIFO */
+#define RFIFO 0x00 /* 0x00/0x01 Rx FIFO */
+#define CMDR 0x02 /* 0x02 Command Register */
+#define MODE 0x03 /* 0x03 Mode Register */
+#define RAH1 0x04 /* 0x04 Receive Address High 1 */
+#define RAH2 0x05 /* 0x05 Receive Address High 2 */
+#define RAL1 0x06 /* 0x06 Receive Address Low 1 */
+#define RAL2 0x07 /* 0x07 Receive Address Low 2 */
+#define IPC 0x08 /* 0x08 Interrupt Port Configuration */
+#define CCR1 0x09 /* 0x09 Common Configuration Register 1 */
+#define CCR2 0x0A /* 0x0A Common Configuration Register 2 */
+#define Res1 0x0B /* 0x0B Free Register 1 */
+#define RTR1 0x0C /* 0x0C Receive Time Slot Register 1 */
+#define RTR2 0x0D /* 0x0D Receive Time Slot Register 2 */
+#define RTR3 0x0E /* 0x0E Receive Time Slot Register 3 */
+#define RTR4 0x0F /* 0x0F Receive Time Slot Register 4 */
+#define TTR1 0x10 /* 0x10 Transmit Time Slot Register 1 */
+#define TTR2 0x11 /* 0x11 Transmit Time Slot Register 2 */
+#define TTR3 0x12 /* 0x12 Transmit Time Slot Register 3 */
+#define TTR4 0x13 /* 0x13 Transmit Time Slot Register 4 */
+#define IMR0 0x14 /* 0x14 Interrupt Mask Register 0 */
+#define IMR1 0x15 /* 0x15 Interrupt Mask Register 1 */
+#define IMR2 0x16 /* 0x16 Interrupt Mask Register 2 */
+#define IMR3 0x17 /* 0x17 Interrupt Mask Register 3 */
+#define IMR4 0x18 /* 0x18 Interrupt Mask Register 4 */
+#define IMR5 0x19 /* 0x19 Interrupt Mask Register 5 */
+#define Res2 0x1A /* 0x1A Free Register 2 */
+#define IERR 0x1B /* 0x1B Single Bit Error Insertion Register */
+#define FMR0 0x1C /* 0x1C Framer Mode Register 0 */
+#define FMR1 0x1D /* 0x1D Framer Mode Register 1 */
+#define FMR2 0x1E /* 0x1E Framer Mode Register 2 */
+#define LOOP 0x1F /* 0x1F Channel Loop-Back */
+#define XSW 0x20 /* 0x20 Transmit Service Word */
+#define XSP 0x21 /* 0x21 Transmit Spare Bits */
+#define XC0 0x22 /* 0x22 Transmit Control 0 */
+#define XC1 0x23 /* 0x23 Transmit Control 1 */
+#define RC0 0x24 /* 0x24 Receive Control 0 */
+#define RC1 0x25 /* 0x25 Receive Control 1 */
+#define XPM0 0x26 /* 0x26 Transmit Pulse Mask 0 */
+#define XPM1 0x27 /* 0x27 Transmit Pulse Mask 1 */
+#define XPM2 0x28 /* 0x28 Transmit Pulse Mask 2 */
+#define TSWM 0x29 /* 0x29 Transparent Service Word Mask */
+#define Res3 0x2A /* 0x2A Free Register 3 */
+#define IDLE 0x2B /* 0x2B Idle Channel Code */
+#define XSA4 0x2C /* 0x2C Transmit Sa4-Bit Register */
+#define XSA5 0x2D /* 0x2D Transmit Sa5-Bit Register */
+#define XSA6 0x2E /* 0x2E Transmit Sa6-Bit Register */
+#define XSA7 0x2F /* 0x2F Transmit Sa7-Bit Register */
+#define XSA8 0x30 /* 0x30 Transmit Sa8-Bit Register */
+#define FMR3 0x31 /* 0x31 Framer Mode Register 3 */
+#define ICB1 0x32 /* 0x32 Idle Channel Register 1 */
+#define ICB2 0x33 /* 0x33 Idle Channel Register 2 */
+#define ICB3 0x34 /* 0x34 Idle Channel Register 3 */
+#define ICB4 0x35 /* 0x35 Idle Channel Register 4 */
+#define LIM0 0x36 /* 0x36 Line Interface Mode 0 */
+#define LIM1 0x37 /* 0x37 Line Interface Mode 1 */
+#define PCD 0x38 /* 0x38 Pulse Count Detection */
+#define PCR 0x39 /* 0x39 Pulse Count Recovery */
+#define LIM2 0x3A /* 0x3A Line Interface Mode 2 */
+#define LCR1 0x3B /* 0x3B Loop Code Register 1 */
+#define LCR2 0x3C /* 0x3C Loop Code Register 2 */
+#define LCR3 0x3D /* 0x3D Loop Code Register 3 */
+#define SIC1 0x3E /* 0x3E System Interface Control 1 */
+#define SIC2 0x3F /* 0x3F System Interface Control 2 */
+#define SIC3 0x40 /* 0x40 System Interface Control 3 */
+#define Res4 0x41 /* 0x41 Free Register 4 */
+#define Res5 0x42 /* 0x42 Free Register 5 */
+#define Res6 0x43 /* 0x43 Free Register 6 */
+#define CMR1 0x44 /* 0x44 Clock Mode Register 1 */
+#define CMR2 0x45 /* 0x45 Clock Mode Register 2 */
+#define GCR 0x46 /* 0x46 Global Configuration Register */
+#define ESM 0x47 /* 0x47 Errored Second Mask */
+#define CMR3 0x48 /* 0x48 Clock Mode Register 3 en V2.2 */
+#define RBD 0x49 /* 0x49 Receive Buffer Delay */
+#define VSTR 0x4A /* 0x4A Version Status Regiter */
+#define RES 0x4B /* 0x4B Receive Equalizer Status */
+#define FRS0 0x4C /* 0x4C Framer Receive Status 0 */
+#define FRS1 0x4D /* 0x4D Framer Receive Status 1 */
+#define RSW 0x4E /* 0x4E Receive Service Word */
+#define RSP 0x4F /* 0x4F Receive Spare Bits */
+#define FEC 0x50 /* 0x50/0x51 Framing Error Counter */
+#define CVC 0x52 /* 0x52/0x53 Code Violation Counter */
+#define CEC1 0x54 /* 0x54/0x55 CRC Error Counter 1 */
+#define EBC 0x56 /* 0x56/0x57 E-Bit Error Counter */
+#define CEC2 0x58 /* 0x58/0x59 CRC Error Counter 2 */
+#define CEC3 0x5A /* 0x5A/0x5B CRC Error Counter 3 */
+#define RSA4 0x5C /* 0x5C Receive Sa4-Bit Register */
+#define RSA5 0x5D /* 0x5D Receive Sa5-Bit Register */
+#define RSA6 0x5E /* 0x5E Receive Sa6-Bit Register */
+#define RSA7 0x5F /* 0x5F Receive Sa7-Bit Register */
+#define DEC 0x60 /* 0x60 Common Register - Disable Error Counter */
+#define RSA8 0x60 /* 0x60 Common Register - Receive Sa8-Bit Regiter */
+#define RSA6S 0x61 /* 0x61 Receive Sa6-Bit Status Register */
+#define RSP1 0x62 /* 0x62 Receive Signaling Pointer 1 */
+#define RSP2 0x63 /* 0x63 Receive Signaling Pointer 2 */
+#define SIS 0x64 /* 0x64 Signaling Status Register */
+#define RSIS 0x65 /* 0x65 Receive Signaling Status Register */
+#define RBCL 0x66 /* 0x66 Receive Byte Control */
+#define RBCH 0x67 /* 0x67 Receive Byte Control */
+#define ISR0 0x68 /* 0x68 Interrupt Status Register 0 */
+#define ISR1 0x69 /* 0x69 Interrupt Status Register 1 */
+#define ISR2 0x6A /* 0x6A Interrupt Status Register 2 */
+#define ISR3 0x6B /* 0x6B Interrupt Status Register 3 */
+#define ISR4 0x6C /* 0x6C Interrupt Status Register 4 */
+#define ISR5 0x6D /* 0x6D Interrupt Status Register 5 */
+#define GIS 0x6E /* 0x6E Global Interrupt Status */
+#define Res8 0x6F /* 0x6F Free Register 8 */
+#define CAS1 0x70 /* 0x70 CAS Register 1 */
+#define CAS2 0x71 /* 0x71 CAS Register 2 */
+#define CAS3 0x72 /* 0x72 CAS Register 3 */
+#define CAS4 0x73 /* 0x73 CAS Register 4 */
+#define CAS5 0x74 /* 0x74 CAS Register 5 */
+#define CAS6 0x75 /* 0x75 CAS Register 6 */
+#define CAS7 0x76 /* 0x76 CAS Register 7 */
+#define CAS8 0x77 /* 0x77 CAS Register 8 */
+#define CAS9 0x78 /* 0x78 CAS Register 9 */
+#define CAS10 0x79 /* 0x79 CAS Register 10 */
+#define CAS11 0x7A /* 0x7A CAS Register 11 */
+#define CAS12 0x7B /* 0x7B CAS Register 12 */
+#define CAS13 0x7C /* 0x7C CAS Register 13 */
+#define CAS14 0x7D /* 0x7D CAS Register 14 */
+#define CAS15 0x7E /* 0x7E CAS Register 15 */
+#define CAS16 0x7F /* 0x7F CAS Register 16 */
+#define PC1 0x80 /* 0x80 Port Configuration 1 */
+#define PC2 0x81 /* 0x81 Port Configuration 2 */
+#define PC3 0x82 /* 0x82 Port Configuration 3 */
+#define PC4 0x83 /* 0x83 Port Configuration 4 */
+#define PC5 0x84 /* 0x84 Port Configuration 5 */
+#define GPC1 0x85 /* 0x85 Global Port Configuration 1 */
+#define PC6 0x86 /* 0x86 Port Configuration 6 */
+#define CMDR2 0x87 /* 0x87 Command Register 2 */
+#define CMDR3 0x88 /* 0x88 Command Register 3 */
+#define CMDR4 0x89 /* 0x89 Command Register 4 */
+#define Res9 0x8A /* 0x8A Free Register 9 */
+#define CCR3 0x8B /* 0x8B Common Control Register 3 */
+#define CCR4 0x8C /* 0x8C Common Control Register 4 */
+#define CCR5 0x8D /* 0x8D Common Control Register 5 */
+#define MODE2 0x8E /* 0x8E Mode Register 2 */
+#define MODE3 0x8F /* 0x8F Mode Register 3 */
+#define RBC2 0x90 /* 0x90 Receive Byte Count Register 2 */
+#define RBC3 0x91 /* 0x91 Receive Byte Count Register 3 */
+#define GCM1 0x92 /* 0x92 Global Counter Mode 1 */
+#define GCM2 0x93 /* 0x93 Global Counter Mode 2 */
+#define GCM3 0x94 /* 0x94 Global Counter Mode 3 */
+#define GCM4 0x95 /* 0x95 Global Counter Mode 4 */
+#define GCM5 0x96 /* 0x96 Global Counter Mode 5 */
+#define GCM6 0x97 /* 0x97 Global Counter Mode 6 */
+#define SIS2_1 0x98 /* 0x98 V1.2 : Signaling Status Register 2 */
+#define GCM7 0x98 /* 0x98 V2.2 : Global Counter Mode 7 */
+#define RSIS2_1 0x99 /* 0x99 V1.2 : Rx Signaling Status Register 2 */
+#define GCM8 0x99 /* 0x99 V2.2 : Global Counter Mode 8 */
+#define SIS3 0x9A /* 0x9A Signaling Status Register 3 */
+#define RSIS3 0x9B /* 0x9B Receive Signaling Status Register 3 */
+#define XFIFO2 0x9C /* 0x9C/0x9D Tx FIFO 2 */
+#define RFIFO2 0x9C /* 0x9C/0x9D Rx FIFO 2 */
+#define XFIFO3 0x9E /* 0x9E/0x9F Tx FIFO 3 */
+#define RFIFO3 0x9E /* 0x9E/0x9F Rx FIFO 3 */
+#define TSEO 0xA0 /* 0xA0 Time Slot Even/Odd select */
+#define TSBS1 0xA1 /* 0xA1 Time Slot Bit select 1 */
+#define TSBS2 0xA2 /* 0xA2 Time Slot Bit select 2 */
+#define TSBS3 0xA3 /* 0xA3 Time Slot Bit select 3 */
+#define TSS2 0xA4 /* 0xA4 Time Slot select 2 */
+#define TSS3 0xA5 /* 0xA5 Time Slot select 3 */
+#define Res10 0xA6 /* 0xA6 Free Register 10 */
+#define Res11 0xA7 /* 0xA7 Free Register 11 */
+#define TPC0 0xA8 /* 0xA8 Test Pattern Control Register 0 */
+#define SIS2 0xA9 /* 0xA9 Signaling Status Register 2 (V2.2) */
+#define RSIS2 0xAA /* 0xAA Rx Signaling Status Register 2 (V2.2) */
+#define MFPI 0xAB /* 0xAB Multi Function Port Input Status */
+#define Res12 0xAC /* 0xAC Free Register 12 */
+#define Res13 0xAD /* 0xAD Free Register 13 */
+#define Res14 0xAE /* 0xAE Free Register 14 */
+#define GLC1 0xAF /* 0xAF Global Line Control Register 1 */
+#define Res15 0xB0 /* 0xB0/0xEB Free Registers */
+#define WID 0xEC /* 0xEC Identification Register */
+
+#endif /* _PEF2256_H */
diff -urN a/Documentation/devicetree/bindings/net/pef2256.txt b/Documentation/devicetree/bindings/net/pef2256.txt
--- a/Documentation/devicetree/bindings/net/pef2256.txt 1970-01-01 01:00:00.000000000 +0100
+++ b/Documentation/devicetree/bindings/net/pef2256.txt 2013-10-13 15:05:42.000000000 +0200
@@ -0,0 +1,77 @@
+* Wan on Lantiq PEF2256 E1 controller, also known as FALC56
+
+This chip was originally called "Infineon PEF2256" before the transfer of the
+former "wire-line" business-unit into an own company.
+
+The PEF2256 is a E1/T1/J1 Framer and Line Interface Component for Long- and
+Short-Haul Applications.
+Its datashhet can be downloaded at
+http://www.datasheetcatalog.com/datasheets_pdf/P/E/F/2/PEF2256E.shtml
+
+The FALC56 framer and line interface component is designed to fulfill all
+required interfacing between analog E1 lines and the digital PCM system
+highway, H.100/H.110 or H-MVIP bus.
+
+Required properties:
+- compatible: Should contain "lantiq,pef2256"
+- reg: Address and length of the register set for the device.
+ There should be a single continuous bank.
+- interrupts: Should contain the single interrupt used by the component to
+ notify special events (error, data received, data transmitted, ...).
+
+Optional properties:
+
+These properties can be defined to adjust the system interface in E1 mode.
+
+The FALC56 offers a flexible feature for system designers where for transmit and
+receive direction different system clocks and system pulses are necessary. The
+interface to the receive system highway is realized by two data buses, one for
+the data RDO and one for the signaling data RSIG. The receive highway is clocked
+on pin SCLKR, while the interface to the transmit system highway is
+independently clocked on pin SCLKX. The frequency of these working clocks and
+the data rate of 2.048/4.096/8.192/16.384 Mbit/s for the receive and transmit
+system interface is programmable.
+
+- clock-rate:
+ Supported values are: 2 (2.048 Mhz), 4 (4.096 Mhz), 8 (8.192 Mhz),
+ 16 (16.384 Mhz).
+ 8 if not defined.
+
+- data-rate:
+ Supported values are: 2 (2.048 Mbit/sec), 4 (4.096 Mbit/sec),
+ 8 (8.192 Mbit/sec), 16 (16.384 Mbit/sec).
+ 8 if not defined.
+
+Adjusting the frame begin (time slot 0, bit 0) relative to SYPR/X or XMFS is
+possible in the range of 0 to 125 µs. The minimum shift of varying the
+time slot 0 begin can be programmed between 1 bit and 1/8 bit depending of the
+system clocking and data rate, e.g. with a clocking/data rate of 2.048 MHz
+shifting is done bit by bit, while running the FALC56 with 16.384 MHz and
+2.048 Mbit/s data rate it is done by 1/8 bit
+
+- channel-phase: First time slot transmission channel phase.
+ Supported values are: 0, 1, 2, 3, 4, 5, 6, 7. 8
+ 0 if not defined.
+
+All transmit or receive system interface data and marker are clocked or sampled
+with the following active edge :
+* Latched with the first falling edge of the selected PCM highway clock.
+* Latched with the first rising edge of the selected PCM highway clock.
+The behaviour of "transmit" and "receive" signals is inverse.
+
+- rising-edge-sync-pulse: rising edge synchronous pulse.
+ Supported values are: "receive", "transmit".
+ "transmit" if not defined.
+
+Examples:
+
+ e1-wan@4,2000000 {
+ compatible = "lantiq,pef2256";
+ reg = <4 0x2000000 0xFF>;
+ interrupts = <8 1>;
+ interrupt-parent = <&PIC>;
+ clock-rate = <4>;
+ data-rate = <4>;
+ channel-phase = <1>;
+ rising-edge-sync-pulse = "transmit";
+ };
diff -urN a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile
--- a/drivers/net/wan/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/net/wan/Makefile 2013-10-13 13:05:01.000000000 +0200
@@ -22,6 +22,7 @@
obj-$(CONFIG_COSA) += cosa.o
obj-$(CONFIG_FARSYNC) += farsync.o
obj-$(CONFIG_DSCC4) += dscc4.o
+obj-$(CONFIG_PEF2256) += pef2256.o
obj-$(CONFIG_X25_ASY) += x25_asy.o
obj-$(CONFIG_LANMEDIA) += lmc/
diff -urN a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
--- a/drivers/net/wan/Kconfig 1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/net/wan/Kconfig 2013-10-13 13:05:01.000000000 +0200
@@ -266,6 +266,16 @@
To compile this driver as a module, choose M here: the
module will be called farsync.
+config PEF2256
+ tristate "PEF2256 support"
+ depends on HDLC && OF && SYSFS
+ help
+ Driver for Lantiq (ex. Infineon) FALC56 E1/T1/J1 Framer and
+ Line Interface based on PEF2256 chipset.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pef2256.
+
config DSCC4
tristate "Etinc PCISYNC serial board support"
depends on HDLC && PCI && m
--
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