[PATCH] Intel IXP4xx network drivers v.2 - Ethernet and HSS

From: Krzysztof Halasa
Date: Mon May 07 2007 - 21:20:23 EST

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Adds a driver for built-in IXP4xx Ethernet MAC and HSS ports

Signed-off-by: Krzysztof Halasa <khc@xxxxxxxxx>

diff --git a/arch/arm/mach-ixp4xx/ixdp425-setup.c b/arch/arm/mach-ixp4xx/ixdp425-setup.c
index ec4f079..f20d39d 100644
--- a/arch/arm/mach-ixp4xx/ixdp425-setup.c
+++ b/arch/arm/mach-ixp4xx/ixdp425-setup.c
@@ -101,10 +101,35 @@ static struct platform_device ixdp425_uart = {
.resource = ixdp425_uart_resources
};

+/* Built-in 10/100 Ethernet MAC interfaces */
+static struct mac_plat_info ixdp425_plat_mac[] = {
+ {
+ .phy = 0,
+ .rxq = 3,
+ }, {
+ .phy = 1,
+ .rxq = 4,
+ }
+};
+
+static struct platform_device ixdp425_mac[] = {
+ {
+ .name = "ixp4xx_eth",
+ .id = IXP4XX_ETH_NPEB,
+ .dev.platform_data = ixdp425_plat_mac,
+ }, {
+ .name = "ixp4xx_eth",
+ .id = IXP4XX_ETH_NPEC,
+ .dev.platform_data = ixdp425_plat_mac + 1,
+ }
+};
+
static struct platform_device *ixdp425_devices[] __initdata = {
&ixdp425_i2c_controller,
&ixdp425_flash,
- &ixdp425_uart
+ &ixdp425_uart,
+ &ixdp425_mac[0],
+ &ixdp425_mac[1],
};

static void __init ixdp425_init(void)
diff --git a/drivers/net/arm/Kconfig b/drivers/net/arm/Kconfig
index 678e4f4..5e2acb6 100644
--- a/drivers/net/arm/Kconfig
+++ b/drivers/net/arm/Kconfig
@@ -46,3 +46,13 @@ config EP93XX_ETH
help
This is a driver for the ethernet hardware included in EP93xx CPUs.
Say Y if you are building a kernel for EP93xx based devices.
+
+config IXP4XX_ETH
+ tristate "IXP4xx Ethernet support"
+ depends on NET_ETHERNET && ARM && ARCH_IXP4XX
+ select IXP4XX_NPE
+ select IXP4XX_QMGR
+ select MII
+ help
+ Say Y here if you want to use built-in Ethernet ports
+ on IXP4xx processor.
diff --git a/drivers/net/arm/Makefile b/drivers/net/arm/Makefile
index a4c8682..7c812ac 100644
--- a/drivers/net/arm/Makefile
+++ b/drivers/net/arm/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_ARM_ETHER3) += ether3.o
obj-$(CONFIG_ARM_ETHER1) += ether1.o
obj-$(CONFIG_ARM_AT91_ETHER) += at91_ether.o
obj-$(CONFIG_EP93XX_ETH) += ep93xx_eth.o
+obj-$(CONFIG_IXP4XX_ETH) += ixp4xx_eth.o
diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c
new file mode 100644
index 0000000..dcea6e5
--- /dev/null
+++ b/drivers/net/arm/ixp4xx_eth.c
@@ -0,0 +1,1002 @@
+/*
+ * Intel IXP4xx Ethernet driver for Linux
+ *
+ * Copyright (C) 2007 Krzysztof Halasa <khc@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * Ethernet port config (0x00 is not present on IXP42X):
+ *
+ * logical port 0x00 0x10 0x20
+ * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
+ * physical PortId 2 0 1
+ * TX queue 23 24 25
+ * RX-free queue 26 27 28
+ * TX-done queue is always 31, RX queue is configurable
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/kernel.h>
+#include <linux/mii.h>
+#include <linux/platform_device.h>
+#include <asm/io.h>
+#include <asm/arch/npe.h>
+#include <asm/arch/qmgr.h>
+
+#ifndef __ARMEB__
+#warning Little endian mode not supported
+#endif
+
+#define DEBUG_QUEUES 0
+#define DEBUG_RX 0
+#define DEBUG_TX 0
+#define DEBUG_PKT_BYTES 0
+#define DEBUG_MDIO 0
+
+#define DRV_NAME "ixp4xx_eth"
+#define DRV_VERSION "0.04"
+
+#define TX_QUEUE_LEN 16 /* dwords */
+#define PKT_DESCS 64 /* also length of queues: TX-done, RX-ready, RX */
+
+#define POOL_ALLOC_SIZE (sizeof(struct desc) * (PKT_DESCS))
+#define REGS_SIZE 0x1000
+#define MAX_MRU 1536
+
+#define MDIO_INTERVAL (3 * HZ)
+#define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
+
+#define NPE_ID(port) ((port)->id >> 4)
+#define PHYSICAL_ID(port) ((NPE_ID(port) + 2) % 3)
+#define TX_QUEUE(plat) (NPE_ID(port) + 23)
+#define RXFREE_QUEUE(plat) (NPE_ID(port) + 26)
+#define TXDONE_QUEUE 31
+
+/* TX Control Registers */
+#define TX_CNTRL0_TX_EN BIT(0)
+#define TX_CNTRL0_HALFDUPLEX BIT(1)
+#define TX_CNTRL0_RETRY BIT(2)
+#define TX_CNTRL0_PAD_EN BIT(3)
+#define TX_CNTRL0_APPEND_FCS BIT(4)
+#define TX_CNTRL0_2DEFER BIT(5)
+#define TX_CNTRL0_RMII BIT(6) /* reduced MII */
+#define TX_CNTRL1_RETRIES 0x0F /* 4 bits */
+
+/* RX Control Registers */
+#define RX_CNTRL0_RX_EN BIT(0)
+#define RX_CNTRL0_PADSTRIP_EN BIT(1)
+#define RX_CNTRL0_SEND_FCS BIT(2)
+#define RX_CNTRL0_PAUSE_EN BIT(3)
+#define RX_CNTRL0_LOOP_EN BIT(4)
+#define RX_CNTRL0_ADDR_FLTR_EN BIT(5)
+#define RX_CNTRL0_RX_RUNT_EN BIT(6)
+#define RX_CNTRL0_BCAST_DIS BIT(7)
+#define RX_CNTRL1_DEFER_EN BIT(0)
+
+/* Core Control Register */
+#define CORE_RESET BIT(0)
+#define CORE_RX_FIFO_FLUSH BIT(1)
+#define CORE_TX_FIFO_FLUSH BIT(2)
+#define CORE_SEND_JAM BIT(3)
+#define CORE_MDC_EN BIT(4) /* NPE-B ETH-0 only */
+
+/* Definitions for MII access routines */
+#define MII_CMD_GO BIT(31)
+#define MII_CMD_WRITE BIT(26)
+#define MII_STAT_READ_FAILED BIT(31)
+
+/* NPE message codes */
+#define NPE_GETSTATUS 0x00
+#define NPE_EDB_SETPORTADDRESS 0x01
+#define NPE_EDB_GETMACADDRESSDATABASE 0x02
+#define NPE_EDB_SETMACADDRESSSDATABASE 0x03
+#define NPE_GETSTATS 0x04
+#define NPE_RESETSTATS 0x05
+#define NPE_SETMAXFRAMELENGTHS 0x06
+#define NPE_VLAN_SETRXTAGMODE 0x07
+#define NPE_VLAN_SETDEFAULTRXVID 0x08
+#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
+#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
+#define NPE_VLAN_SETRXQOSENTRY 0x0B
+#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
+#define NPE_STP_SETBLOCKINGSTATE 0x0D
+#define NPE_FW_SETFIREWALLMODE 0x0E
+#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
+#define NPE_PC_SETAPMACTABLE 0x11
+#define NPE_SETLOOPBACK_MODE 0x12
+#define NPE_PC_SETBSSIDTABLE 0x13
+#define NPE_ADDRESS_FILTER_CONFIG 0x14
+#define NPE_APPENDFCSCONFIG 0x15
+#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
+#define NPE_MAC_RECOVERY_START 0x17
+
+
+struct eth_regs {
+ u32 tx_control[2], __res1[2]; /* 000 */
+ u32 rx_control[2], __res2[2]; /* 010 */
+ u32 random_seed, __res3[3]; /* 020 */
+ u32 partial_empty_threshold, __res4; /* 030 */
+ u32 partial_full_threshold, __res5; /* 038 */
+ u32 tx_start_bytes, __res6[3]; /* 040 */
+ u32 tx_deferral, rx_deferral,__res7[2]; /* 050 */
+ u32 tx_2part_deferral[2], __res8[2]; /* 060 */
+ u32 slot_time, __res9[3]; /* 070 */
+ u32 mdio_command[4]; /* 080 */
+ u32 mdio_status[4]; /* 090 */
+ u32 mcast_mask[6], __res10[2]; /* 0A0 */
+ u32 mcast_addr[6], __res11[2]; /* 0C0 */
+ u32 int_clock_threshold, __res12[3]; /* 0E0 */
+ u32 hw_addr[6], __res13[61]; /* 0F0 */
+ u32 core_control; /* 1FC */
+};
+
+struct port {
+ struct resource *mem_res;
+ struct eth_regs __iomem *regs;
+ struct npe *npe;
+ struct net_device *netdev;
+ struct net_device_stats stat;
+ struct mii_if_info mii;
+ struct delayed_work mdio_thread;
+ struct mac_plat_info *plat;
+ struct sk_buff *rx_skb_tab[PKT_DESCS];
+ struct desc *rx_desc_tab; /* coherent */
+ int id; /* logical port ID */
+ u32 rx_desc_tab_phys;
+ u32 msg_enable;
+};
+
+/* NPE message structure */
+struct msg {
+ union {
+ struct {
+ u8 cmd, eth_id, mac[ETH_ALEN];
+ };
+ struct {
+ u8 cmd, eth_id, __byte2, byte3;
+ u8 __byte4, byte5, __byte6, byte7;
+ };
+ struct {
+ u8 cmd, eth_id, __b2, byte3;
+ u32 data32;
+ };
+ };
+};
+
+/* Ethernet packet descriptor */
+struct desc {
+ u32 next; /* pointer to next buffer, unused */
+ u16 buf_len; /* buffer length */
+ u16 pkt_len; /* packet length */
+ u32 data; /* pointer to data buffer in RAM */
+ u8 dest_id;
+ u8 src_id;
+ u16 flags;
+ u8 qos;
+ u8 padlen;
+ u16 vlan_tci;
+ u8 dest_mac[ETH_ALEN];
+ u8 src_mac[ETH_ALEN];
+};
+
+
+#define rx_desc_phys(port, n) ((port)->rx_desc_tab_phys + \
+ (n) * sizeof(struct desc))
+#define tx_desc_phys(n) (tx_desc_tab_phys + (n) * sizeof(struct desc))
+
+static spinlock_t mdio_lock;
+static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
+static struct npe *mdio_npe;
+static int ports_open;
+static struct dma_pool *dma_pool;
+static struct sk_buff *tx_skb_tab[PKT_DESCS];
+static struct desc *tx_desc_tab; /* coherent */
+static u32 tx_desc_tab_phys;
+
+
+static inline void set_regbits(u32 bits, u32 __iomem *reg)
+{
+ __raw_writel(__raw_readl(reg) | bits, reg);
+}
+static inline void clr_regbits(u32 bits, u32 __iomem *reg)
+{
+ __raw_writel(__raw_readl(reg) & ~bits, reg);
+}
+
+
+static u16 mdio_cmd(struct net_device *dev, int phy_id, int location,
+ int write, u16 cmd)
+{
+ int cycles = 0;
+
+ if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
+ printk("%s: MII not ready to transmit\n", dev->name);
+ return 0; /* not ready to transmit */
+ }
+
+ if (write) {
+ __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
+ __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
+ }
+ __raw_writel(((phy_id << 5) | location) & 0xFF,
+ &mdio_regs->mdio_command[2]);
+ __raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
+ &mdio_regs->mdio_command[3]);
+
+ while ((cycles < MAX_MDIO_RETRIES) &&
+ (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
+ udelay(1);
+ cycles++;
+ }
+
+ if (cycles == MAX_MDIO_RETRIES) {
+ printk("%s: MII write failed\n", dev->name);
+ return 0;
+ }
+
+#if DEBUG_MDIO
+ printk(KERN_DEBUG "mdio_cmd() took %i cycles\n", cycles);
+#endif
+
+ if (write)
+ return 0;
+
+ if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
+ printk("%s: MII read failed\n", dev->name);
+ return 0;
+ }
+
+ return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
+ (__raw_readl(&mdio_regs->mdio_status[1]) << 8);
+}
+
+static int mdio_read(struct net_device *dev, int phy_id, int location)
+{
+ unsigned long flags;
+ u16 val;
+
+ spin_lock_irqsave(&mdio_lock, flags);
+ val = mdio_cmd(dev, phy_id, location, 0, 0);
+ spin_unlock_irqrestore(&mdio_lock, flags);
+ return val;
+}
+
+static void mdio_write(struct net_device *dev, int phy_id, int location,
+ int val)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mdio_lock, flags);
+ mdio_cmd(dev, phy_id, location, 1, val);
+ spin_unlock_irqrestore(&mdio_lock, flags);
+}
+
+static void eth_set_duplex(struct port *port)
+{
+ if (port->mii.full_duplex)
+ clr_regbits(TX_CNTRL0_HALFDUPLEX, &port->regs->tx_control[0]);
+ else
+ set_regbits(TX_CNTRL0_HALFDUPLEX, &port->regs->tx_control[0]);
+}
+
+
+static void mdio_thread(struct work_struct *work)
+{
+ struct port *port = container_of(work, struct port, mdio_thread.work);
+
+ if (mii_check_media(&port->mii, 1, 0))
+ eth_set_duplex(port);
+ schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
+}
+
+
+static inline void debug_skb(const char *func, struct sk_buff *skb)
+{
+#if DEBUG_PKT_BYTES
+ int i;
+
+ printk(KERN_DEBUG "%s(%i): ", func, skb->len);
+ for (i = 0; i < skb->len; i++) {
+ if (i >= DEBUG_PKT_BYTES)
+ break;
+ printk("%s%02X",
+ ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
+ skb->data[i]);
+ }
+ printk("\n");
+#endif
+}
+
+
+static inline void debug_desc(unsigned int queue, u32 desc_phys,
+ struct desc *desc, int is_get)
+{
+#if DEBUG_QUEUES
+ const char *op = is_get ? "->" : "<-";
+
+ if (!desc_phys) {
+ printk(KERN_DEBUG "queue %2i %s NULL\n", queue, op);
+ return;
+ }
+ printk(KERN_DEBUG "queue %2i %s %X: %X %3X %3X %08X %2X < %2X %4X %X"
+ " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
+ queue, op, desc_phys, desc->next, desc->buf_len, desc->pkt_len,
+ desc->data, desc->dest_id, desc->src_id,
+ desc->flags, desc->qos,
+ desc->padlen, desc->vlan_tci,
+ desc->dest_mac[0], desc->dest_mac[1],
+ desc->dest_mac[2], desc->dest_mac[3],
+ desc->dest_mac[4], desc->dest_mac[5],
+ desc->src_mac[0], desc->src_mac[1],
+ desc->src_mac[2], desc->src_mac[3],
+ desc->src_mac[4], desc->src_mac[5]);
+#endif
+}
+
+static inline int queue_get_desc(unsigned int queue, struct port *port,
+ int is_tx)
+{
+ u32 phys, tab_phys, n_desc;
+ struct desc *tab;
+
+ if (!(phys = qmgr_get_entry(queue))) {
+ debug_desc(queue, phys, NULL, 1);
+ return -1;
+ }
+
+ phys &= ~0x1F; /* mask out non-address bits */
+ tab_phys = is_tx ? tx_desc_phys(0) : rx_desc_phys(port, 0);
+ tab = is_tx ? tx_desc_tab : port->rx_desc_tab;
+ n_desc = (phys - tab_phys) / sizeof(struct desc);
+ BUG_ON(n_desc >= PKT_DESCS);
+
+ debug_desc(queue, phys, &tab[n_desc], 1);
+ BUG_ON(tab[n_desc].next);
+ return n_desc;
+}
+
+static inline void queue_put_desc(unsigned int queue, u32 desc_phys,
+ struct desc *desc)
+{
+ debug_desc(queue, desc_phys, desc, 0);
+ BUG_ON(desc_phys & 0x1F);
+ qmgr_put_entry(queue, desc_phys);
+}
+
+
+static void eth_rx_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct port *port = netdev_priv(dev);
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "eth_rx_irq() start\n");
+#endif
+ qmgr_disable_irq(port->plat->rxq);
+ netif_rx_schedule(dev);
+}
+
+static int eth_poll(struct net_device *dev, int *budget)
+{
+ struct port *port = netdev_priv(dev);
+ unsigned int queue = port->plat->rxq;
+ int quota = dev->quota, received = 0;
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "eth_poll() start\n");
+#endif
+ while (quota) {
+ struct sk_buff *old_skb, *new_skb;
+ struct desc *desc;
+ u32 data;
+ int n = queue_get_desc(queue, port, 0);
+ if (n < 0) { /* No packets received */
+ dev->quota -= received;
+ *budget -= received;
+ received = 0;
+ netif_rx_complete(dev);
+ qmgr_enable_irq(queue);
+ if (!qmgr_stat_empty(queue) &&
+ netif_rx_reschedule(dev, 0)) {
+ qmgr_disable_irq(queue);
+ continue;
+ }
+ return 0; /* all work done */
+ }
+
+ desc = &port->rx_desc_tab[n];
+
+ if ((new_skb = netdev_alloc_skb(dev, MAX_MRU)) != NULL) {
+#if 0
+ skb_reserve(new_skb, 2); /* FIXME */
+#endif
+ data = dma_map_single(&dev->dev, new_skb->data,
+ MAX_MRU, DMA_FROM_DEVICE);
+ }
+
+ if (!new_skb || dma_mapping_error(data)) {
+ if (new_skb)
+ dev_kfree_skb(new_skb);
+ port->stat.rx_dropped++;
+ /* put the desc back on RX-ready queue */
+ desc->buf_len = MAX_MRU;
+ desc->pkt_len = 0;
+ queue_put_desc(RXFREE_QUEUE(port->plat),
+ rx_desc_phys(port, n), desc);
+ BUG_ON(qmgr_stat_overflow(RXFREE_QUEUE(port->plat)));
+ continue;
+ }
+
+ /* process received skb */
+ old_skb = port->rx_skb_tab[n];
+ dma_unmap_single(&dev->dev, desc->data,
+ MAX_MRU, DMA_FROM_DEVICE);
+ skb_put(old_skb, desc->pkt_len);
+
+ debug_skb("eth_poll", old_skb);
+
+ old_skb->protocol = eth_type_trans(old_skb, dev);
+ dev->last_rx = jiffies;
+ port->stat.rx_packets++;
+ port->stat.rx_bytes += old_skb->len;
+ netif_receive_skb(old_skb);
+
+ /* put the new skb on RX-free queue */
+ port->rx_skb_tab[n] = new_skb;
+ desc->buf_len = MAX_MRU;
+ desc->pkt_len = 0;
+ desc->data = data;
+ queue_put_desc(RXFREE_QUEUE(port->plat),
+ rx_desc_phys(port, n), desc);
+ BUG_ON(qmgr_stat_overflow(RXFREE_QUEUE(port->plat)));
+ quota--;
+ received++;
+ }
+ dev->quota -= received;
+ *budget -= received;
+ return 1; /* not all work done */
+}
+
+static void eth_xmit_ready_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "eth_xmit_empty() start\n");
+#endif
+ netif_start_queue(dev);
+}
+
+static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct desc *desc;
+ u32 phys;
+ struct sk_buff *old_skb;
+ int n;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "eth_xmit() start\n");
+#endif
+ if (unlikely(skb->len > MAX_MRU)) {
+ dev_kfree_skb(skb);
+ port->stat.tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ n = queue_get_desc(TXDONE_QUEUE, port, 1);
+ BUG_ON(n < 0);
+ desc = &tx_desc_tab[n];
+ phys = tx_desc_phys(n);
+
+ if ((old_skb = tx_skb_tab[n]) != NULL) {
+ dma_unmap_single(&dev->dev, desc->data,
+ desc->buf_len, DMA_TO_DEVICE);
+ port->stat.tx_packets++;
+ port->stat.tx_bytes += old_skb->len;
+ dev_kfree_skb(old_skb);
+ }
+
+ /* disable VLAN functions in NPE image for now */
+ memset(desc, 0, sizeof(*desc));
+ desc->buf_len = desc->pkt_len = skb->len;
+ desc->data = dma_map_single(&dev->dev, skb->data,
+ skb->len, DMA_TO_DEVICE);
+ if (dma_mapping_error(desc->data)) {
+ desc->data = 0;
+ dev_kfree_skb(skb);
+ tx_skb_tab[n] = NULL;
+ port->stat.tx_dropped++;
+ /* put the desc back on TX-done queue */
+ queue_put_desc(TXDONE_QUEUE, phys, desc);
+ return 0;
+ }
+
+ tx_skb_tab[n] = skb;
+ debug_skb("eth_xmit", skb);
+
+ /* NPE firmware pads short frames with zeros internally */
+ wmb();
+ queue_put_desc(TX_QUEUE(port->plat), phys, desc);
+ BUG_ON(qmgr_stat_overflow(TX_QUEUE(port->plat)));
+ dev->trans_start = jiffies;
+
+ if (qmgr_stat_full(TX_QUEUE(port->plat))) {
+ netif_stop_queue(dev);
+ /* we could miss TX ready interrupt */
+ if (!qmgr_stat_full(TX_QUEUE(port->plat))) {
+ netif_start_queue(dev);
+ }
+ }
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "eth_xmit() end\n");
+#endif
+ return NETDEV_TX_OK;
+}
+
+
+static struct net_device_stats *eth_stats(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ return &port->stat;
+}
+
+static void eth_set_mcast_list(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct dev_mc_list *mclist = dev->mc_list;
+ u8 diffs[ETH_ALEN], *addr;
+ int cnt = dev->mc_count, i;
+
+ if ((dev->flags & IFF_PROMISC) || !mclist || !cnt) {
+ clr_regbits(RX_CNTRL0_ADDR_FLTR_EN,
+ &port->regs->rx_control[0]);
+ return;
+ }
+
+ memset(diffs, 0, ETH_ALEN);
+ addr = mclist->dmi_addr; /* first MAC address */
+
+ while (--cnt && (mclist = mclist->next))
+ for (i = 0; i < ETH_ALEN; i++)
+ diffs[i] |= addr[i] ^ mclist->dmi_addr[i];
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ __raw_writel(addr[i], &port->regs->mcast_addr[i]);
+ __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
+ }
+
+ set_regbits(RX_CNTRL0_ADDR_FLTR_EN, &port->regs->rx_control[0]);
+}
+
+
+static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+ struct port *port = netdev_priv(dev);
+ unsigned int duplex_chg;
+ int err;
+
+ if (!netif_running(dev))
+ return -EINVAL;
+ err = generic_mii_ioctl(&port->mii, if_mii(req), cmd, &duplex_chg);
+ if (duplex_chg)
+ eth_set_duplex(port);
+ return err;
+}
+
+
+static int request_queues(struct port *port)
+{
+ int err;
+
+ err = qmgr_request_queue(RXFREE_QUEUE(port->plat), PKT_DESCS, 0, 0);
+ if (err)
+ return err;
+
+ err = qmgr_request_queue(port->plat->rxq, PKT_DESCS, 0, 0);
+ if (err)
+ goto rel_rxfree;
+
+ err = qmgr_request_queue(TX_QUEUE(port->plat), TX_QUEUE_LEN, 0, 0);
+ if (err)
+ goto rel_rx;
+
+ /* TX-done queue handles skbs sent out by the NPEs */
+ if (!ports_open) {
+ err = qmgr_request_queue(TXDONE_QUEUE, PKT_DESCS, 0, 0);
+ if (err)
+ goto rel_tx;
+ }
+ return 0;
+
+rel_tx:
+ qmgr_release_queue(TX_QUEUE(port->plat));
+rel_rx:
+ qmgr_release_queue(port->plat->rxq);
+rel_rxfree:
+ qmgr_release_queue(RXFREE_QUEUE(port->plat));
+ return err;
+}
+
+static void release_queues(struct port *port)
+{
+ qmgr_release_queue(RXFREE_QUEUE(port->plat));
+ qmgr_release_queue(port->plat->rxq);
+ qmgr_release_queue(TX_QUEUE(port->plat));
+
+ if (!ports_open)
+ qmgr_release_queue(TXDONE_QUEUE);
+}
+
+static int init_queues(struct port *port)
+{
+ int i;
+
+ if (!dma_pool) {
+ /* Setup TX descriptors - common to all ports */
+ dma_pool = dma_pool_create(DRV_NAME, NULL, POOL_ALLOC_SIZE,
+ 32, 0);
+ if (!dma_pool)
+ return -ENOMEM;
+
+ if (!(tx_desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
+ &tx_desc_tab_phys)))
+ return -ENOMEM;
+ memset(tx_desc_tab, 0, POOL_ALLOC_SIZE);
+ memset(tx_skb_tab, 0, sizeof(tx_skb_tab)); /* static table */
+
+ for (i = 0; i < PKT_DESCS; i++) {
+ queue_put_desc(TXDONE_QUEUE, tx_desc_phys(i),
+ &tx_desc_tab[i]);
+ BUG_ON(qmgr_stat_overflow(TXDONE_QUEUE));
+ }
+ }
+
+ /* Setup RX buffers */
+ if (!(port->rx_desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
+ &port->rx_desc_tab_phys)))
+ return -ENOMEM;
+ memset(port->rx_desc_tab, 0, POOL_ALLOC_SIZE);
+ memset(port->rx_skb_tab, 0, sizeof(port->rx_skb_tab)); /* table */
+
+ for (i = 0; i < PKT_DESCS; i++) {
+ struct desc *desc = &port->rx_desc_tab[i];
+ struct sk_buff *skb;
+
+ if (!(skb = netdev_alloc_skb(port->netdev, MAX_MRU)))
+ return -ENOMEM;
+ port->rx_skb_tab[i] = skb;
+ desc->buf_len = MAX_MRU;
+#if 0
+ skb_reserve(skb, 2); /* FIXME */
+#endif
+ desc->data = dma_map_single(&port->netdev->dev, skb->data,
+ MAX_MRU, DMA_FROM_DEVICE);
+ if (dma_mapping_error(desc->data)) {
+ desc->data = 0;
+ return -EIO;
+ }
+ queue_put_desc(RXFREE_QUEUE(port->plat),
+ rx_desc_phys(port, i), desc);
+ BUG_ON(qmgr_stat_overflow(RXFREE_QUEUE(port->plat)));
+ }
+ return 0;
+}
+
+static void destroy_queues(struct port *port)
+{
+ int i;
+
+ while (queue_get_desc(RXFREE_QUEUE(port->plat), port, 0) >= 0)
+ /* nothing to do here */;
+ while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
+ /* nothing to do here */;
+ while (queue_get_desc(TX_QUEUE(port->plat), port, 1) >= 0) {
+ /* nothing to do here */;
+ }
+ if (!ports_open)
+ while (queue_get_desc(TXDONE_QUEUE, port, 1) >= 0)
+ /* nothing to do here */;
+
+ if (port->rx_desc_tab) {
+ for (i = 0; i < PKT_DESCS; i++) {
+ struct desc *desc = &port->rx_desc_tab[i];
+ struct sk_buff *skb = port->rx_skb_tab[i];
+ if (skb) {
+ if (desc->data)
+ dma_unmap_single(&port->netdev->dev,
+ desc->data, MAX_MRU,
+ DMA_FROM_DEVICE);
+ dev_kfree_skb(skb);
+ }
+ }
+ dma_pool_free(dma_pool, port->rx_desc_tab,
+ port->rx_desc_tab_phys);
+ port->rx_desc_tab = NULL;
+ }
+
+ if (!ports_open && tx_desc_tab) {
+ for (i = 0; i < PKT_DESCS; i++) {
+ struct desc *desc = &tx_desc_tab[i];
+ struct sk_buff *skb = tx_skb_tab[i];
+ if (skb) {
+ if (desc->data)
+ dma_unmap_single(&port->netdev->dev,
+ desc->data,
+ desc->buf_len,
+ DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+ }
+ }
+ dma_pool_free(dma_pool, tx_desc_tab, tx_desc_tab_phys);
+ tx_desc_tab = NULL;
+ }
+ if (!ports_open && dma_pool) {
+ dma_pool_destroy(dma_pool);
+ dma_pool = NULL;
+ }
+}
+
+static int eth_load_firmware(struct net_device *dev, struct npe *npe)
+{
+ struct msg msg;
+ int err;
+
+ if ((err = npe_load_firmware(npe, npe_name(npe), &dev->dev)) != 0)
+ return err;
+
+ if ((err = npe_recv_message(npe, &msg, "ETH_GET_STATUS")) != 0) {
+ printk(KERN_ERR "%s: %s not responding\n", dev->name,
+ npe_name(npe));
+ return err;
+ }
+ return 0;
+}
+
+static int eth_open(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+ struct npe *npe = port->npe;
+ struct msg msg;
+ int i, err;
+
+ if (!npe_running(npe))
+ if (eth_load_firmware(dev, npe))
+ return -EIO;
+
+ if (!npe_running(mdio_npe))
+ if (eth_load_firmware(dev, mdio_npe))
+ return -EIO;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = NPE_VLAN_SETRXQOSENTRY;
+ msg.eth_id = port->id;
+ msg.byte5 = port->plat->rxq | 0x80;
+ msg.byte7 = port->plat->rxq << 4;
+ for (i = 0; i < 8; i++) {
+ msg.byte3 = i;
+ if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
+ return -EIO;
+ }
+
+ msg.cmd = NPE_EDB_SETPORTADDRESS;
+ msg.eth_id = PHYSICAL_ID(port);
+ memcpy(msg.mac, dev->dev_addr, ETH_ALEN);
+ if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
+ return -EIO;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = NPE_FW_SETFIREWALLMODE;
+ msg.eth_id = port->id;
+ if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
+ return -EIO;
+
+ if ((err = request_queues(port)) != 0)
+ return err;
+
+ if ((err = init_queues(port)) != 0) {
+ destroy_queues(port);
+ release_queues(port);
+ return err;
+ }
+
+ for (i = 0; i < ETH_ALEN; i++)
+ __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
+ __raw_writel(0x08, &port->regs->random_seed);
+ __raw_writel(0x12, &port->regs->partial_empty_threshold);
+ __raw_writel(0x30, &port->regs->partial_full_threshold);
+ __raw_writel(0x08, &port->regs->tx_start_bytes);
+ __raw_writel(0x15, &port->regs->tx_deferral);
+ __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
+ __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
+ __raw_writel(0x80, &port->regs->slot_time);
+ __raw_writel(0x01, &port->regs->int_clock_threshold);
+ __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
+ __raw_writel(TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | TX_CNTRL0_PAD_EN |
+ TX_CNTRL0_APPEND_FCS | TX_CNTRL0_2DEFER,
+ &port->regs->tx_control[0]);
+ __raw_writel(0, &port->regs->rx_control[1]);
+ __raw_writel(RX_CNTRL0_RX_EN | RX_CNTRL0_PADSTRIP_EN,
+ &port->regs->rx_control[0]);
+
+ if (mii_check_media(&port->mii, 1, 1))
+ eth_set_duplex(port);
+ eth_set_mcast_list(dev);
+ netif_start_queue(dev);
+ schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
+
+ qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
+ eth_rx_irq, dev);
+ qmgr_set_irq(TX_QUEUE(port->plat), QUEUE_IRQ_SRC_NOT_FULL,
+ eth_xmit_ready_irq, dev);
+ qmgr_enable_irq(port->plat->rxq);
+ qmgr_enable_irq(TX_QUEUE(port->plat));
+ ports_open++;
+ return 0;
+}
+
+static int eth_close(struct net_device *dev)
+{
+ struct port *port = netdev_priv(dev);
+
+ ports_open--;
+ qmgr_disable_irq(port->plat->rxq);
+ qmgr_disable_irq(TX_QUEUE(port->plat));
+ netif_stop_queue(dev);
+
+ clr_regbits(RX_CNTRL0_RX_EN, &port->regs->rx_control[0]);
+ clr_regbits(TX_CNTRL0_TX_EN, &port->regs->tx_control[0]);
+ set_regbits(CORE_RESET | CORE_RX_FIFO_FLUSH | CORE_TX_FIFO_FLUSH,
+ &port->regs->core_control);
+ udelay(10);
+ clr_regbits(CORE_RESET | CORE_RX_FIFO_FLUSH | CORE_TX_FIFO_FLUSH,
+ &port->regs->core_control);
+
+ cancel_rearming_delayed_work(&port->mdio_thread);
+ destroy_queues(port);
+ release_queues(port);
+ return 0;
+}
+
+static int __devinit eth_init_one(struct platform_device *pdev)
+{
+ struct port *port;
+ struct net_device *dev;
+ struct mac_plat_info *plat = pdev->dev.platform_data;
+ u32 regs_phys;
+ int err;
+
+ if (!(dev = alloc_etherdev(sizeof(struct port))))
+ return -ENOMEM;
+
+ SET_MODULE_OWNER(dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ port = netdev_priv(dev);
+ port->netdev = dev;
+ port->id = pdev->id;
+
+ switch (port->id) {
+ case IXP4XX_ETH_NPEA:
+ port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
+ regs_phys = IXP4XX_EthA_BASE_PHYS;
+ break;
+ case IXP4XX_ETH_NPEB:
+ port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+ regs_phys = IXP4XX_EthB_BASE_PHYS;
+ break;
+ case IXP4XX_ETH_NPEC:
+ port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
+ regs_phys = IXP4XX_EthC_BASE_PHYS;
+ break;
+ default:
+ err = -ENOSYS;
+ goto err_free;
+ }
+
+ dev->open = eth_open;
+ dev->hard_start_xmit = eth_xmit;
+ dev->poll = eth_poll;
+ dev->stop = eth_close;
+ dev->get_stats = eth_stats;
+ dev->do_ioctl = eth_ioctl;
+ dev->set_multicast_list = eth_set_mcast_list;
+ dev->weight = 16;
+ dev->tx_queue_len = 100;
+
+ if (!(port->npe = npe_request(NPE_ID(port)))) {
+ err = -EIO;
+ goto err_free;
+ }
+
+ if (register_netdev(dev)) {
+ err = -EIO;
+ goto err_npe_rel;
+ }
+
+ port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
+ if (!port->mem_res) {
+ err = -EBUSY;
+ goto err_unreg;
+ }
+
+ port->plat = plat;
+ memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
+
+ platform_set_drvdata(pdev, dev);
+
+ __raw_writel(CORE_RESET, &port->regs->core_control);
+ udelay(50);
+ __raw_writel(CORE_MDC_EN, &port->regs->core_control);
+ udelay(50);
+
+ port->mii.dev = dev;
+ port->mii.mdio_read = mdio_read;
+ port->mii.mdio_write = mdio_write;
+ port->mii.phy_id = plat->phy;
+ port->mii.phy_id_mask = 0x1F;
+ port->mii.reg_num_mask = 0x1F;
+
+ INIT_DELAYED_WORK(&port->mdio_thread, mdio_thread);
+
+ printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
+ npe_name(port->npe));
+ return 0;
+
+err_unreg:
+ unregister_netdev(dev);
+err_npe_rel:
+ npe_release(port->npe);
+err_free:
+ free_netdev(dev);
+ return err;
+}
+
+static int __devexit eth_remove_one(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct port *port = netdev_priv(dev);
+
+ unregister_netdev(dev);
+ platform_set_drvdata(pdev, NULL);
+ npe_release(port->npe);
+ release_resource(port->mem_res);
+ free_netdev(dev);
+ return 0;
+}
+
+static struct platform_driver drv = {
+ .driver.name = DRV_NAME,
+ .probe = eth_init_one,
+ .remove = eth_remove_one,
+};
+
+static int __init eth_init_module(void)
+{
+ if (!(ixp4xx_read_fuses() & IXP4XX_FUSE_NPEB_ETH0))
+ return -ENOSYS;
+
+ /* All MII PHY accesses use NPE-B Ethernet registers */
+ if (!(mdio_npe = npe_request(1)))
+ return -EIO;
+ spin_lock_init(&mdio_lock);
+ mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+
+ return platform_driver_register(&drv);
+}
+
+static void __exit eth_cleanup_module(void)
+{
+ platform_driver_unregister(&drv);
+ npe_release(mdio_npe);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa");
+MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
+MODULE_LICENSE("GPL v2");
+module_init(eth_init_module);
+module_exit(eth_cleanup_module);
diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
index 5f79622..b891e10 100644
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -342,6 +342,16 @@ config DSCC4_PCI_RST

Say Y if your card supports this feature.

+config IXP4XX_HSS
+ tristate "IXP4xx HSS (synchronous serial port) support"
+ depends on ARM && ARCH_IXP4XX
+ select IXP4XX_NPE
+ select IXP4XX_QMGR
+ select HDLC
+ help
+ Say Y here if you want to use built-in HSS ports
+ on IXP4xx processor.
+
config DLCI
tristate "Frame Relay DLCI support"
---help---
diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile
index d61fef3..1b1d116 100644
--- a/drivers/net/wan/Makefile
+++ b/drivers/net/wan/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_C101) += c101.o
obj-$(CONFIG_WANXL) += wanxl.o
obj-$(CONFIG_PCI200SYN) += pci200syn.o
obj-$(CONFIG_PC300TOO) += pc300too.o
+obj-$(CONFIG_IXP4XX_HSS) += ixp4xx_hss.o

clean-files := wanxlfw.inc
$(obj)/wanxl.o: $(obj)/wanxlfw.inc
diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c
new file mode 100644
index 0000000..ed56ed8
--- /dev/null
+++ b/drivers/net/wan/ixp4xx_hss.c
@@ -0,0 +1,1048 @@
+/*
+ * Intel IXP4xx HSS (synchronous serial port) driver for Linux
+ *
+ * Copyright (C) 2007 Krzysztof Halasa <khc@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/kernel.h>
+#include <linux/hdlc.h>
+#include <linux/platform_device.h>
+#include <asm/io.h>
+#include <asm/arch/npe.h>
+#include <asm/arch/qmgr.h>
+
+#ifndef __ARMEB__
+#warning Little endian mode not supported
+#endif
+
+#define DEBUG_QUEUES 0
+#define DEBUG_RX 0
+#define DEBUG_TX 0
+
+#define DRV_NAME "ixp4xx_hss"
+#define DRV_VERSION "0.03"
+
+#define PKT_EXTRA_FLAGS 0 /* orig 1 */
+#define FRAME_SYNC_OFFSET 0 /* unused, channelized only */
+#define FRAME_SYNC_SIZE 1024
+#define PKT_NUM_PIPES 1 /* 1, 2 or 4 */
+#define PKT_PIPE_FIFO_SIZEW 4 /* total 4 dwords per HSS */
+
+#define RX_DESCS 16 /* also length of queues: RX-ready, RX */
+#define TX_DESCS 16 /* also length of queues: TX-done, TX */
+
+#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+#define RX_SIZE (HDLC_MAX_MRU + 4) /* NPE needs more space */
+
+/* Queue IDs */
+#define HSS0_CHL_RXTRIG_QUEUE 12 /* orig size = 32 dwords */
+#define HSS0_PKT_RX_QUEUE 13 /* orig size = 32 dwords */
+#define HSS0_PKT_TX0_QUEUE 14 /* orig size = 16 dwords */
+#define HSS0_PKT_TX1_QUEUE 15
+#define HSS0_PKT_TX2_QUEUE 16
+#define HSS0_PKT_TX3_QUEUE 17
+#define HSS0_PKT_RXFREE0_QUEUE 18 /* orig size = 16 dwords */
+#define HSS0_PKT_RXFREE1_QUEUE 19
+#define HSS0_PKT_RXFREE2_QUEUE 20
+#define HSS0_PKT_RXFREE3_QUEUE 21
+#define HSS0_PKT_TXDONE_QUEUE 22 /* orig size = 64 dwords */
+
+#define HSS1_CHL_RXTRIG_QUEUE 10
+#define HSS1_PKT_RX_QUEUE 0
+#define HSS1_PKT_TX0_QUEUE 5
+#define HSS1_PKT_TX1_QUEUE 6
+#define HSS1_PKT_TX2_QUEUE 7
+#define HSS1_PKT_TX3_QUEUE 8
+#define HSS1_PKT_RXFREE0_QUEUE 1
+#define HSS1_PKT_RXFREE1_QUEUE 2
+#define HSS1_PKT_RXFREE2_QUEUE 3
+#define HSS1_PKT_RXFREE3_QUEUE 4
+#define HSS1_PKT_TXDONE_QUEUE 9
+
+#define NPE_PKT_MODE_HDLC 0
+#define NPE_PKT_MODE_RAW 1
+#define NPE_PKT_MODE_56KMODE 2
+#define NPE_PKT_MODE_56KENDIAN_MSB 4
+
+/* PKT_PIPE_HDLC_CFG_WRITE flags */
+#define PKT_HDLC_IDLE_ONES 0x1 /* default = flags */
+#define PKT_HDLC_CRC_32 0x2 /* default = CRC-16 */
+#define PKT_HDLC_MSB_ENDIAN 0x4 /* default = LE */
+
+
+/* hss_config, PCRs */
+/* Frame sync sampling, default = active low */
+#define PCR_FRM_SYNC_ACTIVE_HIGH 0x40000000
+#define PCR_FRM_SYNC_FALLINGEDGE 0x80000000
+#define PCR_FRM_SYNC_RISINGEDGE 0xC0000000
+
+/* Frame sync pin: input (default) or output generated off a given clk edge */
+#define PCR_FRM_SYNC_OUTPUT_FALLING 0x20000000
+#define PCR_FRM_SYNC_OUTPUT_RISING 0x30000000
+
+/* Frame and data clock sampling on edge, default = falling */
+#define PCR_FCLK_EDGE_RISING 0x08000000
+#define PCR_DCLK_EDGE_RISING 0x04000000
+
+/* Clock direction, default = input */
+#define PCR_SYNC_CLK_DIR_OUTPUT 0x02000000
+
+/* Generate/Receive frame pulses, default = enabled */
+#define PCR_FRM_PULSE_DISABLED 0x01000000
+
+ /* Data rate is full (default) or half the configured clk speed */
+#define PCR_HALF_CLK_RATE 0x00200000
+
+/* Invert data between NPE and HSS FIFOs? (default = no) */
+#define PCR_DATA_POLARITY_INVERT 0x00100000
+
+/* TX/RX endianness, default = LSB */
+#define PCR_MSB_ENDIAN 0x00080000
+
+/* Normal (default) / open drain mode (TX only) */
+#define PCR_TX_PINS_OPEN_DRAIN 0x00040000
+
+/* No framing bit transmitted and expected on RX? (default = framing bit) */
+#define PCR_SOF_NO_FBIT 0x00020000
+
+/* Drive data pins? */
+#define PCR_TX_DATA_ENABLE 0x00010000
+
+/* Voice 56k type: drive the data pins low (default), high, high Z */
+#define PCR_TX_V56K_HIGH 0x00002000
+#define PCR_TX_V56K_HIGH_IMP 0x00004000
+
+/* Unassigned type: drive the data pins low (default), high, high Z */
+#define PCR_TX_UNASS_HIGH 0x00000800
+#define PCR_TX_UNASS_HIGH_IMP 0x00001000
+
+/* T1 @ 1.544MHz only: Fbit dictated in FIFO (default) or high Z */
+#define PCR_TX_FB_HIGH_IMP 0x00000400
+
+/* 56k data endiannes - which bit unused: high (default) or low */
+#define PCR_TX_56KE_BIT_0_UNUSED 0x00000200
+
+/* 56k data transmission type: 32/8 bit data (default) or 56K data */
+#define PCR_TX_56KS_56K_DATA 0x00000100
+
+/* hss_config, cCR */
+/* Number of packetized clients, default = 1 */
+#define CCR_NPE_HFIFO_2_HDLC 0x04000000
+#define CCR_NPE_HFIFO_3_OR_4HDLC 0x08000000
+
+/* default = no loopback */
+#define CCR_LOOPBACK 0x02000000
+
+/* HSS number, default = 0 (first) */
+#define CCR_SECOND_HSS 0x01000000
+
+
+/* hss_config, clkCR: main:10, num:10, denom:12 */
+#define CLK42X_SPEED_EXP ((0x3FF << 22) | ( 2 << 12) | 15) /*65 KHz*/
+
+#define CLK42X_SPEED_512KHZ (( 130 << 22) | ( 2 << 12) | 15)
+#define CLK42X_SPEED_1536KHZ (( 43 << 22) | ( 18 << 12) | 47)
+#define CLK42X_SPEED_1544KHZ (( 43 << 22) | ( 33 << 12) | 192)
+#define CLK42X_SPEED_2048KHZ (( 32 << 22) | ( 34 << 12) | 63)
+#define CLK42X_SPEED_4096KHZ (( 16 << 22) | ( 34 << 12) | 127)
+#define CLK42X_SPEED_8192KHZ (( 8 << 22) | ( 34 << 12) | 255)
+
+#define CLK46X_SPEED_512KHZ (( 130 << 22) | ( 24 << 12) | 127)
+#define CLK46X_SPEED_1536KHZ (( 43 << 22) | (152 << 12) | 383)
+#define CLK46X_SPEED_1544KHZ (( 43 << 22) | ( 66 << 12) | 385)
+#define CLK46X_SPEED_2048KHZ (( 32 << 22) | (280 << 12) | 511)
+#define CLK46X_SPEED_4096KHZ (( 16 << 22) | (280 << 12) | 1023)
+#define CLK46X_SPEED_8192KHZ (( 8 << 22) | (280 << 12) | 2047)
+
+
+/* hss_config, LUTs: default = unassigned */
+#define TDMMAP_HDLC 1 /* HDLC - packetised */
+#define TDMMAP_VOICE56K 2 /* Voice56K - channelised */
+#define TDMMAP_VOICE64K 3 /* Voice64K - channelised */
+
+
+/* NPE command codes */
+/* writes the ConfigWord value to the location specified by offset */
+#define PORT_CONFIG_WRITE 0x40
+
+/* triggers the NPE to load the contents of the configuration table */
+#define PORT_CONFIG_LOAD 0x41
+
+/* triggers the NPE to return an HssErrorReadResponse message */
+#define PORT_ERROR_READ 0x42
+
+/* reset NPE internal status and enable the HssChannelized operation */
+#define CHAN_FLOW_ENABLE 0x43
+#define CHAN_FLOW_DISABLE 0x44
+#define CHAN_IDLE_PATTERN_WRITE 0x45
+#define CHAN_NUM_CHANS_WRITE 0x46
+#define CHAN_RX_BUF_ADDR_WRITE 0x47
+#define CHAN_RX_BUF_CFG_WRITE 0x48
+#define CHAN_TX_BLK_CFG_WRITE 0x49
+#define CHAN_TX_BUF_ADDR_WRITE 0x4A
+#define CHAN_TX_BUF_SIZE_WRITE 0x4B
+#define CHAN_TSLOTSWITCH_ENABLE 0x4C
+#define CHAN_TSLOTSWITCH_DISABLE 0x4D
+
+/* downloads the gainWord value for a timeslot switching channel associated
+ with bypassNum */
+#define CHAN_TSLOTSWITCH_GCT_DOWNLOAD 0x4E
+
+/* triggers the NPE to reset internal status and enable the HssPacketized
+ operation for the flow specified by pPipe */
+#define PKT_PIPE_FLOW_ENABLE 0x50
+#define PKT_PIPE_FLOW_DISABLE 0x51
+#define PKT_NUM_PIPES_WRITE 0x52
+#define PKT_PIPE_FIFO_SIZEW_WRITE 0x53
+#define PKT_PIPE_HDLC_CFG_WRITE 0x54
+#define PKT_PIPE_IDLE_PATTERN_WRITE 0x55
+#define PKT_PIPE_RX_SIZE_WRITE 0x56
+#define PKT_PIPE_MODE_WRITE 0x57
+
+
+#define HSS_TIMESLOTS 128
+#define HSS_LUT_BITS 2
+
+/* HDLC packet status values - desc->status */
+#define ERR_SHUTDOWN 1 /* stop or shutdown occurrance */
+#define ERR_HDLC_ALIGN 2 /* HDLC alignment error */
+#define ERR_HDLC_FCS 3 /* HDLC Frame Check Sum error */
+#define ERR_RXFREE_Q_EMPTY 4 /* RX-free queue became empty while receiving
+ this packet (if buf_len < pkt_len) */
+#define ERR_HDLC_TOO_LONG 5 /* HDLC frame size too long */
+#define ERR_HDLC_ABORT 6 /* abort sequence received */
+#define ERR_DISCONNECTING 7 /* disconnect is in progress */
+
+
+struct port {
+ struct npe *npe;
+ struct net_device *netdev;
+ struct hss_plat_info *plat;
+ struct sk_buff *rx_skb_tab[RX_DESCS], *tx_skb_tab[TX_DESCS];
+ struct desc *desc_tab; /* coherent */
+ u32 desc_tab_phys;
+ sync_serial_settings settings;
+ int id;
+ u8 hdlc_cfg;
+};
+
+/* NPE message structure */
+struct msg {
+ u8 cmd, unused, hss_port, index;
+ union {
+ u8 data8[4];
+ u16 data16[2];
+ u32 data32;
+ };
+};
+
+
+/* HDLC packet descriptor */
+struct desc {
+ u32 next; /* pointer to next buffer, unused */
+ u16 buf_len; /* buffer length */
+ u16 pkt_len; /* packet length */
+ u32 data; /* pointer to data buffer in RAM */
+ u8 status;
+ u8 error_count;
+ u16 __reserved;
+ u32 __reserved1[4];
+};
+
+#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
+#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
+ (n) * sizeof(struct desc))
+#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
+#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
+ ((n) + RX_DESCS) * sizeof(struct desc))
+
+static int ports_open;
+static struct dma_pool *dma_pool;
+
+static struct {
+ int tx, txdone, rx, rxfree;
+}queue_ids[2] = {{ HSS0_PKT_TX0_QUEUE, HSS0_PKT_TXDONE_QUEUE,
+ HSS0_PKT_RX_QUEUE, HSS0_PKT_RXFREE0_QUEUE },
+ { HSS1_PKT_TX0_QUEUE, HSS1_PKT_TXDONE_QUEUE,
+ HSS1_PKT_RX_QUEUE, HSS1_PKT_RXFREE0_QUEUE },
+};
+
+
+static inline struct port* dev_to_port(struct net_device *dev)
+{
+ return dev_to_hdlc(dev)->priv;
+}
+
+
+static inline void debug_desc(unsigned int queue, u32 desc_phys,
+ struct desc *desc, int is_get)
+{
+#if DEBUG_QUEUES
+ const char *op = is_get ? "->" : "<-";
+
+ if (!desc_phys) {
+ printk(KERN_DEBUG "queue %2i %s NULL\n", queue, op);
+ return;
+ }
+ printk(KERN_DEBUG "queue %2i %s %X: %X %3X %3X %08X %X %X\n",
+ queue, op, desc_phys, desc->next, desc->buf_len, desc->pkt_len,
+ desc->data, desc->status, desc->error_count);
+#endif
+}
+
+static inline int queue_get_desc(unsigned int queue, struct port *port,
+ int is_tx)
+{
+ u32 phys, tab_phys, n_desc;
+ struct desc *tab;
+
+ if (!(phys = qmgr_get_entry(queue))) {
+ debug_desc(queue, phys, NULL, 1);
+ return -1;
+ }
+
+ BUG_ON(phys & 0x1F);
+ tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
+ tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
+ n_desc = (phys - tab_phys) / sizeof(struct desc);
+ BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
+
+ debug_desc(queue, phys, &tab[n_desc], 1);
+ BUG_ON(tab[n_desc].next);
+ return n_desc;
+}
+
+static inline void queue_put_desc(unsigned int queue, u32 desc_phys,
+ struct desc *desc)
+{
+ debug_desc(queue, desc_phys, desc, 0);
+ BUG_ON(desc_phys & 0x1F);
+ qmgr_put_entry(queue, desc_phys);
+}
+
+
+static void hss_set_carrier(void *pdev, int carrier)
+{
+ struct net_device *dev = pdev;
+ if (carrier)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+}
+
+static void hss_rx_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct port *port = dev_to_port(dev);
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_rx_irq() start\n");
+#endif
+ qmgr_disable_irq(queue_ids[port->id].rx);
+ netif_rx_schedule(dev);
+}
+
+static int hss_poll(struct net_device *dev, int *budget)
+{
+ struct port *port = dev_to_port(dev);
+ unsigned int queue = queue_ids[port->id].rx;
+ struct net_device_stats *stats = hdlc_stats(dev);
+ int quota = dev->quota, received = 0;
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_poll() start\n");
+#endif
+ while (quota) {
+ struct sk_buff *old_skb, *new_skb = NULL;
+ struct desc *desc;
+ u32 data;
+ int n = queue_get_desc(queue, port, 0);
+ if (n < 0) { /* No packets received */
+ dev->quota -= received;
+ *budget -= received;
+ received = 0;
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_poll() netif_rx_complete()\n");
+#endif
+ netif_rx_complete(dev);
+ qmgr_enable_irq(queue);
+ if (!qmgr_stat_empty(queue) &&
+ netif_rx_reschedule(dev, 0)) {
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_poll()"
+ " netif_rx_reschedule() successed\n");
+#endif
+ qmgr_disable_irq(queue);
+ continue;
+ }
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_poll() all done\n");
+#endif
+ return 0; /* all work done */
+ }
+
+ desc = rx_desc_ptr(port, n);
+
+ if (!desc->status) /* check for RX errors */
+ new_skb = netdev_alloc_skb(dev, RX_SIZE);
+ if (new_skb)
+ data = dma_map_single(&dev->dev, new_skb->data,
+ RX_SIZE, DMA_FROM_DEVICE);
+
+ if (!new_skb || dma_mapping_error(data)) {
+ if (new_skb)
+ dev_kfree_skb(new_skb);
+ switch (desc->status) {
+ case 0:
+ stats->rx_dropped++;
+ break;
+ case ERR_HDLC_ALIGN:
+ case ERR_HDLC_ABORT:
+ stats->rx_frame_errors++;
+ stats->rx_errors++;
+ break;
+ case ERR_HDLC_FCS:
+ stats->rx_crc_errors++;
+ stats->rx_errors++;
+ break;
+ case ERR_HDLC_TOO_LONG:
+ stats->rx_length_errors++;
+ stats->rx_errors++;
+ break;
+ default: /* FIXME - remove printk */
+ printk(KERN_ERR "hss_poll(): status 0x%02X"
+ " errors %u\n", desc->status,
+ desc->error_count);
+ stats->rx_errors++;
+ }
+ /* put the desc back on RX-ready queue */
+ desc->buf_len = RX_SIZE;
+ desc->pkt_len = desc->status = 0;
+ queue_put_desc(queue_ids[port->id].rxfree,
+ rx_desc_phys(port, n), desc);
+ BUG_ON(qmgr_stat_overflow(queue_ids[port->id].rxfree));
+ continue;
+ }
+
+ if (desc->error_count) /* FIXME - remove printk */
+ printk(KERN_ERR "hss_poll(): status 0x%02X"
+ " errors %u\n", desc->status,
+ desc->error_count);
+
+ /* process received skb */
+ old_skb = port->rx_skb_tab[n];
+ dma_unmap_single(&dev->dev, desc->data,
+ RX_SIZE, DMA_FROM_DEVICE);
+
+ skb_put(old_skb, desc->pkt_len);
+ old_skb->protocol = hdlc_type_trans(old_skb, dev);
+ dev->last_rx = jiffies;
+ stats->rx_packets++;
+ stats->rx_bytes += old_skb->len;
+ netif_receive_skb(old_skb);
+
+ /* put the new skb on RX-free queue */
+ port->rx_skb_tab[n] = new_skb;
+ desc->buf_len = RX_SIZE;
+ desc->pkt_len = 0;
+ desc->data = data;
+ queue_put_desc(queue_ids[port->id].rxfree,
+ rx_desc_phys(port, n), desc);
+ BUG_ON(qmgr_stat_overflow(queue_ids[port->id].rxfree));
+ quota--;
+ received++;
+ }
+ dev->quota -= received;
+ *budget -= received;
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_poll() end, not all work done\n");
+#endif
+ return 1; /* not all work done */
+}
+
+static void hss_xmit_ready_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "hss_xmit_empty() start\n");
+#endif
+ netif_start_queue(dev);
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "hss_xmit_empty() end\n");
+#endif
+}
+
+static int hss_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ struct net_device_stats *stats = hdlc_stats(dev);
+ struct desc *desc;
+ u32 phys;
+ struct sk_buff *old_skb;
+ int n;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "hss_xmit() start\n");
+#endif
+ if (unlikely(skb->len > HDLC_MAX_MRU)) {
+ dev_kfree_skb(skb);
+ stats->tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ n = queue_get_desc(queue_ids[port->id].txdone, port, 1);
+ BUG_ON(n < 0);
+ desc = tx_desc_ptr(port, n);
+ phys = tx_desc_phys(port, n);
+
+ if ((old_skb = port->tx_skb_tab[n]) != NULL) {
+ dma_unmap_single(&dev->dev, desc->data,
+ desc->buf_len, DMA_TO_DEVICE);
+ stats->tx_packets++;
+ stats->tx_bytes += old_skb->len;
+ dev_kfree_skb(old_skb);
+ }
+
+ desc->buf_len = desc->pkt_len = skb->len;
+ desc->data = dma_map_single(&dev->dev, skb->data,
+ skb->len, DMA_TO_DEVICE);
+ if (dma_mapping_error(desc->data)) {
+ desc->data = 0;
+ dev_kfree_skb(skb);
+ port->tx_skb_tab[n] = NULL;
+ stats->tx_dropped++;
+ /* put the desc back on TX-done queue */
+ queue_put_desc(queue_ids[port->id].txdone, phys, desc);
+ return 0;
+ }
+
+ port->tx_skb_tab[n] = skb;
+ wmb();
+ queue_put_desc(queue_ids[port->id].tx, phys, desc);
+ BUG_ON(qmgr_stat_overflow(queue_ids[port->id].tx));
+ dev->trans_start = jiffies;
+
+ if (qmgr_stat_empty(queue_ids[port->id].txdone)) {
+ netif_stop_queue(dev);
+ /* we could miss TX ready interrupt */
+ if (!qmgr_stat_empty(queue_ids[port->id].txdone)) {
+ netif_start_queue(dev);
+ }
+ }
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "hss_xmit() end\n");
+#endif
+ return NETDEV_TX_OK;
+}
+
+
+static int request_queues(struct port *port)
+{
+ int err;
+
+ err = qmgr_request_queue(queue_ids[port->id].rxfree, RX_DESCS, 0, 0);
+ if (err)
+ return err;
+
+ err = qmgr_request_queue(queue_ids[port->id].rx, RX_DESCS, 0, 0);
+ if (err)
+ goto rel_rxfree;
+
+ err = qmgr_request_queue(queue_ids[port->id].tx, TX_DESCS, 0, 0);
+ if (err)
+ goto rel_rx;
+
+ err = qmgr_request_queue(queue_ids[port->id].txdone, TX_DESCS, 0, 0);
+ if (err)
+ goto rel_tx;
+ return 0;
+
+rel_tx:
+ qmgr_release_queue(queue_ids[port->id].tx);
+rel_rx:
+ qmgr_release_queue(queue_ids[port->id].rx);
+rel_rxfree:
+ qmgr_release_queue(queue_ids[port->id].rxfree);
+ return err;
+}
+
+static void release_queues(struct port *port)
+{
+ qmgr_release_queue(queue_ids[port->id].rxfree);
+ qmgr_release_queue(queue_ids[port->id].rx);
+ qmgr_release_queue(queue_ids[port->id].txdone);
+ qmgr_release_queue(queue_ids[port->id].tx);
+}
+
+static int init_queues(struct port *port)
+{
+ int i;
+
+ if (!dma_pool) {
+ dma_pool = dma_pool_create(DRV_NAME, NULL, POOL_ALLOC_SIZE,
+ 32, 0);
+ if (!dma_pool)
+ return -ENOMEM;
+ }
+
+ if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
+ &port->desc_tab_phys)))
+ return -ENOMEM;
+ memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
+ memset(port->rx_skb_tab, 0, sizeof(port->rx_skb_tab)); /* tables */
+ memset(port->tx_skb_tab, 0, sizeof(port->tx_skb_tab));
+
+ /* Setup RX buffers */
+ for (i = 0; i < RX_DESCS; i++) {
+ struct desc *desc = rx_desc_ptr(port, i);
+ struct sk_buff *skb;
+
+ if (!(skb = netdev_alloc_skb(port->netdev, RX_SIZE)))
+ return -ENOMEM;
+ port->rx_skb_tab[i] = skb;
+ desc->buf_len = RX_SIZE;
+ desc->data = dma_map_single(&port->netdev->dev, skb->data,
+ RX_SIZE, DMA_FROM_DEVICE);
+ if (dma_mapping_error(desc->data)) {
+ desc->data = 0;
+ return -EIO;
+ }
+ queue_put_desc(queue_ids[port->id].rxfree,
+ rx_desc_phys(port, i), desc);
+ BUG_ON(qmgr_stat_overflow(queue_ids[port->id].rxfree));
+ }
+
+ /* Setup TX-done queue */
+ for (i = 0; i < TX_DESCS; i++) {
+ queue_put_desc(queue_ids[port->id].txdone,
+ tx_desc_phys(port, i), tx_desc_ptr(port, i));
+ BUG_ON(qmgr_stat_overflow(queue_ids[port->id].txdone));
+ }
+ return 0;
+}
+
+static void destroy_queues(struct port *port)
+{
+ int i;
+
+ while (queue_get_desc(queue_ids[port->id].rxfree, port, 0) >= 0)
+ /* nothing to do here */;
+ while (queue_get_desc(queue_ids[port->id].rx, port, 0) >= 0)
+ /* nothing to do here */;
+ while (queue_get_desc(queue_ids[port->id].tx, port, 1) >= 0)
+ /* nothing to do here */;
+ while (queue_get_desc(queue_ids[port->id].txdone, port, 1) >= 0)
+ /* nothing to do here */;
+
+ if (port->desc_tab) {
+ for (i = 0; i < RX_DESCS; i++) {
+ struct desc *desc = rx_desc_ptr(port, i);
+ struct sk_buff *skb = port->rx_skb_tab[i];
+ if (skb) {
+ if (desc->data)
+ dma_unmap_single(&port->netdev->dev,
+ desc->data, RX_SIZE,
+ DMA_FROM_DEVICE);
+ dev_kfree_skb(skb);
+ }
+ }
+ for (i = 0; i < TX_DESCS; i++) {
+ struct desc *desc = tx_desc_ptr(port, i);
+ struct sk_buff *skb = port->tx_skb_tab[i];
+ if (skb) {
+ if (desc->data)
+ dma_unmap_single(&port->netdev->dev,
+ desc->data,
+ desc->buf_len,
+ DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+ }
+ }
+ dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
+ port->desc_tab = NULL;
+ }
+
+ if (!ports_open && dma_pool) {
+ dma_pool_destroy(dma_pool);
+ dma_pool = NULL;
+ }
+}
+
+
+static int hss_open(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ struct npe *npe = port->npe;
+ struct msg msg;
+ int i, err;
+
+ if (!npe_running(npe))
+ if ((err = npe_load_firmware(npe, npe_name(npe),
+ &dev->dev)) != 0)
+ return err;
+
+ if ((err = hdlc_open(dev)) != 0)
+ return err;
+
+ if (port->plat->open)
+ if ((err = port->plat->open(port->id, port->netdev,
+ hss_set_carrier)) != 0)
+ goto err_hdlc_close;
+
+ /* HSS main configuration */
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = 0; /* offset in HSS config */
+
+ msg.data32 = PCR_FRM_PULSE_DISABLED |
+ PCR_SOF_NO_FBIT |
+ PCR_MSB_ENDIAN |
+ PCR_TX_DATA_ENABLE;
+
+ if (port->settings.clock_type == CLOCK_INT)
+ msg.data32 |= PCR_SYNC_CLK_DIR_OUTPUT;
+
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_TX_PCR") != 0))
+ goto err_plat_close; /* 0: TX PCR */
+
+ msg.index = 4;
+ msg.data32 ^= PCR_TX_DATA_ENABLE | PCR_DCLK_EDGE_RISING;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_RX_PCR") != 0))
+ goto err_plat_close; /* 4: RX PCR */
+
+ msg.index = 8;
+ msg.data32 = (port->settings.loopback ? CCR_LOOPBACK : 0) |
+ (port->id ? CCR_SECOND_HSS : 0);
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_CORE_CR") != 0))
+ goto err_plat_close; /* 8: Core CR */
+
+ msg.index = 12;
+ msg.data32 = CLK42X_SPEED_2048KHZ /* FIXME */;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_CLK_CR") != 0))
+ goto err_plat_close; /* 12: CLK CR */
+
+ msg.data32 = (FRAME_SYNC_OFFSET << 16) | (FRAME_SYNC_SIZE - 1);
+ msg.index = 16;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_TX_FCR") != 0))
+ goto err_plat_close; /* 16: TX FCR */
+
+ msg.index = 20;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_RX_FCR") != 0))
+ goto err_plat_close; /* 20: RX FCR */
+
+ msg.data32 = 0; /* Fill LUT with HDLC timeslots */
+ for (i = 0; i < 32 / HSS_LUT_BITS; i++)
+ msg.data32 |= TDMMAP_HDLC << (HSS_LUT_BITS * i);
+
+ for (i = 0; i < 2 /* TX and RX */ * HSS_TIMESLOTS * HSS_LUT_BITS / 8;
+ i += 4) {
+ msg.index = 24 + i; /* 24 - 55: TX LUT, 56 - 87: RX LUT */
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_LUT") != 0))
+ goto err_plat_close;
+ }
+
+ /* HDLC mode configuration */
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_NUM_PIPES_WRITE;
+ msg.hss_port = port->id;
+ msg.data8[0] = PKT_NUM_PIPES;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_PKT_PIPES") != 0))
+ goto err_plat_close;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_FIFO_SIZEW_WRITE;
+ msg.hss_port = port->id;
+ msg.data8[0] = PKT_PIPE_FIFO_SIZEW;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_PKT_FIFO") != 0))
+ goto err_plat_close;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_IDLE_PATTERN_WRITE;
+ msg.hss_port = port->id;
+ msg.data32 = 0x7F7F7F7F;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_PKT_IDLE") != 0))
+ goto err_plat_close;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_LOAD;
+ msg.hss_port = port->id;
+ if ((err = npe_send_message(npe, &msg, "HSS_LOAD_CONFIG") != 0))
+ goto err_plat_close;
+ if ((err = npe_recv_message(npe, &msg, "HSS_LOAD_CONFIG") != 0))
+ goto err_plat_close;
+
+ /* HSS_LOAD_CONFIG for port #1 returns port_id = #4 */
+ if (msg.cmd != PORT_CONFIG_LOAD || msg.data32) {
+ printk(KERN_DEBUG "%s: unexpected message received in"
+ " response to HSS_LOAD_CONFIG: \n", npe_name(npe));
+ err = EIO;
+ goto err_plat_close;
+ }
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_HDLC_CFG_WRITE;
+ msg.hss_port = port->id;
+ msg.data8[0] = port->hdlc_cfg; /* rx_cfg */
+ msg.data8[1] = port->hdlc_cfg | (PKT_EXTRA_FLAGS << 3); /* tx_cfg */
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_HDLC_CFG") != 0))
+ goto err_plat_close;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_MODE_WRITE;
+ msg.hss_port = port->id;
+ msg.data8[0] = NPE_PKT_MODE_HDLC;
+ /* msg.data8[1] = inv_mask */
+ /* msg.data8[2] = or_mask */
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_PKT_MODE") != 0))
+ goto err_plat_close;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_RX_SIZE_WRITE;
+ msg.hss_port = port->id;
+ msg.data16[0] = HDLC_MAX_MRU;
+ if ((err = npe_send_message(npe, &msg, "HSS_SET_PKT_RX_SIZE") != 0))
+ goto err_plat_close;
+
+ if ((err = request_queues(port)) != 0)
+ goto err_plat_close;
+
+ if ((err = init_queues(port)) != 0)
+ goto err_destroy_queues;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_FLOW_ENABLE;
+ msg.hss_port = port->id;
+ if ((err = npe_send_message(npe, &msg, "HSS_ENABLE_PKT_PIPE") != 0))
+ goto err_destroy_queues;
+
+ netif_start_queue(dev);
+
+ qmgr_set_irq(queue_ids[port->id].rx, QUEUE_IRQ_SRC_NOT_EMPTY,
+ hss_rx_irq, dev);
+ qmgr_enable_irq(queue_ids[port->id].rx);
+
+ qmgr_set_irq(queue_ids[port->id].txdone, QUEUE_IRQ_SRC_NOT_EMPTY,
+ hss_xmit_ready_irq, dev);
+ qmgr_enable_irq(queue_ids[port->id].txdone);
+
+ ports_open++;
+ return 0;
+
+err_destroy_queues:
+ destroy_queues(port);
+ release_queues(port);
+err_plat_close:
+ if (port->plat->close)
+ port->plat->close(port->id, port->netdev);
+err_hdlc_close:
+ hdlc_close(dev);
+ return err;
+}
+
+static int hss_close(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ struct npe *npe = port->npe;
+ struct msg msg;
+
+ ports_open--;
+ qmgr_disable_irq(queue_ids[port->id].rx);
+ qmgr_disable_irq(queue_ids[port->id].txdone);
+ netif_stop_queue(dev);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_FLOW_DISABLE;
+ msg.hss_port = port->id;
+ if (npe_send_message(npe, &msg, "HSS_DISABLE_PKT_PIPE")) {
+ printk(KERN_CRIT "HSS-%i: unable to stop HDLC flow\n",
+ port->id);
+ /* The upper level would ignore the error anyway */
+ }
+
+ destroy_queues(port);
+ release_queues(port);
+
+ if (port->plat->close)
+ port->plat->close(port->id, port->netdev);
+ hdlc_close(dev);
+ return 0;
+}
+
+
+static int hss_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ struct port *port = dev_to_port(dev);
+
+ if (encoding != ENCODING_NRZ)
+ return -EINVAL;
+
+ switch(parity) {
+ case PARITY_CRC16_PR1_CCITT:
+ port->hdlc_cfg = 0;
+ return 0;
+
+ case PARITY_CRC32_PR1_CCITT:
+ port->hdlc_cfg = PKT_HDLC_CRC_32;
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+
+static int hss_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ int clk;
+ sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
+ struct port *port = dev_to_port(dev);
+
+ if (cmd != SIOCWANDEV)
+ return hdlc_ioctl(dev, ifr, cmd);
+
+ switch(ifr->ifr_settings.type) {
+ case IF_GET_IFACE:
+ ifr->ifr_settings.type = IF_IFACE_V35;
+ if (ifr->ifr_settings.size < size) {
+ ifr->ifr_settings.size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(line, &port->settings, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL:
+ case IF_IFACE_V35:
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (dev->flags & IFF_UP)
+ return -EBUSY; /* Cannot change parameters when open */
+
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ clk = new_line.clock_type;
+ if (port->plat->set_clock)
+ clk = port->plat->set_clock(port->id, clk);
+
+ if (clk != CLOCK_EXT && clk != CLOCK_INT)
+ return -EINVAL; /* No such clock setting */
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ memcpy(&port->settings, &new_line, size); /* Update settings */
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifr, cmd);
+ }
+}
+
+
+static int __devinit hss_init_one(struct platform_device *pdev)
+{
+ struct port *port;
+ struct net_device *dev;
+ hdlc_device *hdlc;
+ int err;
+
+ if ((port = kzalloc(sizeof(*port), GFP_KERNEL)) == NULL)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, port);
+ port->id = pdev->id;
+
+ if ((port->npe = npe_request(0)) == NULL) {
+ err = -ENOSYS;
+ goto err_free;
+ }
+
+ port->plat = pdev->dev.platform_data;
+ if ((port->netdev = dev = alloc_hdlcdev(port)) == NULL) {
+ err = -ENOMEM;
+ goto err_plat;
+ }
+
+ SET_MODULE_OWNER(net);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ hdlc = dev_to_hdlc(dev);
+ hdlc->attach = hss_attach;
+ hdlc->xmit = hss_xmit;
+ dev->open = hss_open;
+ dev->poll = hss_poll;
+ dev->stop = hss_close;
+ dev->do_ioctl = hss_ioctl;
+ dev->weight = 16;
+ dev->tx_queue_len = 100;
+ port->settings.clock_type = CLOCK_EXT;
+ port->settings.clock_rate = 2048000;
+
+ if (register_hdlc_device(dev)) {
+ printk(KERN_ERR "HSS-%i: unable to register HDLC device\n",
+ port->id);
+ err = -ENOBUFS;
+ goto err_free_netdev;
+ }
+ printk(KERN_INFO "%s: HSS-%i\n", dev->name, port->id);
+ return 0;
+
+err_free_netdev:
+ free_netdev(dev);
+err_plat:
+ npe_release(port->npe);
+ platform_set_drvdata(pdev, NULL);
+err_free:
+ kfree(port);
+ return err;
+}
+
+static int __devexit hss_remove_one(struct platform_device *pdev)
+{
+ struct port *port = platform_get_drvdata(pdev);
+
+ unregister_hdlc_device(port->netdev);
+ free_netdev(port->netdev);
+ npe_release(port->npe);
+ platform_set_drvdata(pdev, NULL);
+ kfree(port);
+ return 0;
+}
+
+static struct platform_driver drv = {
+ .driver.name = DRV_NAME,
+ .probe = hss_init_one,
+ .remove = hss_remove_one,
+};
+
+static int __init hss_init_module(void)
+{
+ if ((ixp4xx_read_fuses() & (IXP4XX_FUSE_HDLC | IXP4XX_FUSE_HSS)) !=
+ (IXP4XX_FUSE_HDLC | IXP4XX_FUSE_HSS))
+ return -ENOSYS;
+ return platform_driver_register(&drv);
+}
+
+static void __exit hss_cleanup_module(void)
+{
+ platform_driver_unregister(&drv);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@xxxxxxxxx>");
+MODULE_DESCRIPTION("Intel IXP4xx HSS driver");
+MODULE_LICENSE("GPL v2");
+
+module_init(hss_init_module);
+module_exit(hss_cleanup_module);
diff --git a/include/asm-arm/arch-ixp4xx/platform.h b/include/asm-arm/arch-ixp4xx/platform.h
index ab194e5..3a07ee2 100644
--- a/include/asm-arm/arch-ixp4xx/platform.h
+++ b/include/asm-arm/arch-ixp4xx/platform.h
@@ -86,6 +86,25 @@ struct ixp4xx_i2c_pins {
unsigned long scl_pin;
};

+#define IXP4XX_ETH_NPEA 0x00
+#define IXP4XX_ETH_NPEB 0x10
+#define IXP4XX_ETH_NPEC 0x20
+
+/* Information about built-in Ethernet MAC interfaces */
+struct mac_plat_info {
+ u8 phy; /* MII PHY ID, 0 - 31 */
+ u8 rxq; /* configurable, currently 0 - 31 only */
+ u8 hwaddr[6];
+};
+
+/* Information about built-in HSS (synchronous serial) interfaces */
+struct hss_plat_info {
+ int (*set_clock)(int port, unsigned int clock_type);
+ int (*open)(int port, void *pdev,
+ void (*set_carrier_cb)(void *pdev, int carrier));
+ void (*close)(int port, void *pdev);
+};
+
/*
* This structure provide a means for the board setup code
* to give information to th pata_ixp4xx driver. It is
-
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