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openwrt-xburst/target/linux/ixp4xx/patches-2.6.28/210-npe_hss.patch

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preliminary ixp4xx 2.6.28 support git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13548 3c298f89-4303-0410-b956-a3cf2f4a3e73
2008-12-08 16:46:04 +02:00
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -333,6 +333,15 @@ config DSCC4_PCI_RST
Say Y if your card supports this feature.
+config IXP4XX_HSS
+ tristate "IXP4xx HSS (synchronous serial port) support"
+ depends on HDLC && ARM && ARCH_IXP4XX
+ select IXP4XX_NPE
+ select IXP4XX_QMGR
+ help
+ Say Y here if you want to use built-in HSS ports
+ on IXP4xx processor.
+
config DLCI
tristate "Frame Relay DLCI support"
---help---
--- a/drivers/net/wan/Makefile
+++ b/drivers/net/wan/Makefile
@@ -41,6 +41,7 @@ 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
--- /dev/null
+++ b/drivers/net/wan/ixp4xx_hss.c
@@ -0,0 +1,2886 @@
+/*
+ * Intel IXP4xx HSS (synchronous serial port) driver for Linux
+ *
+ * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * 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/bitops.h>
+#include <linux/cdev.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/hdlc.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <asm/arch/npe.h>
+#include <asm/arch/qmgr.h>
+
+#define DEBUG_QUEUES 0
+#define DEBUG_DESC 0
+#define DEBUG_RX 0
+#define DEBUG_TX 0
+#define DEBUG_PKT_BYTES 0
+#define DEBUG_CLOSE 0
+#define DEBUG_FRAMER 0
+
+#define DRV_NAME "ixp4xx_hss"
+
+#define PKT_EXTRA_FLAGS 0 /* orig 1 */
+#define TX_FRAME_SYNC_OFFSET 0 /* channelized */
+#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 all RX queues */
+#define TX_DESCS 16 /* also length of all TX queues */
+
+#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+#define RX_SIZE (HDLC_MAX_MRU + 4) /* NPE needs more space */
+#define MAX_CLOSE_WAIT 1000 /* microseconds */
+#define HSS_COUNT 2
+#define MIN_FRAME_SIZE 16 /* bits */
+#define MAX_FRAME_SIZE 257 /* 256 bits + framing bit */
+#define MAX_CHANNELS (MAX_FRAME_SIZE / 8)
+#define MAX_CHAN_DEVICES 32
+#define CHANNEL_HDLC 0xFE
+#define CHANNEL_UNUSED 0xFF
+
+#define NAPI_WEIGHT 16
+#define CHAN_RX_TRIGGER 16 /* 8 RX frames = 1 ms @ E1 */
+#define CHAN_RX_FRAMES 64
+#define MAX_CHAN_RX_BAD_SYNC (CHAN_RX_TRIGGER / 2 /* pairs */ - 3)
+#define CHAN_TX_LIST_FRAMES 16 /* bytes/channel per list, 16 - 48 */
+#define CHAN_TX_LISTS 8
+#define CHAN_TX_FRAMES (CHAN_TX_LIST_FRAMES * CHAN_TX_LISTS)
+#define CHAN_QUEUE_LEN 16 /* minimum possible */
+
+
+/* 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, LUT entries */
+#define TDMMAP_UNASSIGNED 0
+#define TDMMAP_HDLC 1 /* HDLC - packetized */
+#define TDMMAP_VOICE56K 2 /* Voice56K - 7-bit channelized */
+#define TDMMAP_VOICE64K 3 /* Voice64K - 8-bit channelized */
+
+/* offsets into HSS config */
+#define HSS_CONFIG_TX_PCR 0x00 /* port configuration registers */
+#define HSS_CONFIG_RX_PCR 0x04
+#define HSS_CONFIG_CORE_CR 0x08 /* loopback control, HSS# */
+#define HSS_CONFIG_CLOCK_CR 0x0C /* clock generator control */
+#define HSS_CONFIG_TX_FCR 0x10 /* frame configuration registers */
+#define HSS_CONFIG_RX_FCR 0x14
+#define HSS_CONFIG_TX_LUT 0x18 /* channel look-up tables */
+#define HSS_CONFIG_RX_LUT 0x38
+
+
+/* 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
+
+/* 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 */
+
+
+enum mode {MODE_HDLC = 0, MODE_RAW, MODE_G704};
+enum error_bit {TX_ERROR_BIT = 0, RX_ERROR_BIT = 1};
+enum alignment { NOT_ALIGNED = 0, EVEN_FIRST, ODD_FIRST };
+
+#ifdef __ARMEB__
+typedef struct sk_buff buffer_t;
+#define free_buffer dev_kfree_skb
+#define free_buffer_irq dev_kfree_skb_irq
+#else
+typedef void buffer_t;
+#define free_buffer kfree
+#define free_buffer_irq kfree
+#endif
+
+struct chan_device {
+ struct cdev cdev;
+ struct device *dev;
+ struct port *port;
+ unsigned int open_count, excl_open;
+ unsigned int tx_first, tx_count, rx_first, rx_count; /* bytes */
+ unsigned long errors_bitmap;
+ u8 id, chan_count;
+ u8 log_channels[MAX_CHANNELS];
+};
+
+struct port {
+ struct device *dev;
+ struct npe *npe;
+ struct net_device *netdev;
+ struct napi_struct napi;
+ struct hss_plat_info *plat;
+ buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
+ struct desc *desc_tab; /* coherent */
+ u32 desc_tab_phys;
+ unsigned int id;
+ atomic_t chan_tx_irq_number, chan_rx_irq_number;
+ wait_queue_head_t chan_tx_waitq, chan_rx_waitq;
+ u8 hdlc_cfg;
+
+ /* the following fields must be protected by npe_lock */
+ enum mode mode;
+ unsigned int clock_type, clock_rate, loopback;
+ unsigned int frame_size, frame_sync_offset;
+
+ struct chan_device *chan_devices[MAX_CHAN_DEVICES];
+ u8 *chan_buf;
+ u32 chan_tx_buf_phys, chan_rx_buf_phys;
+ unsigned int chan_open_count, hdlc_open;
+ unsigned int chan_started, initialized, just_set_offset;
+ enum alignment aligned, carrier;
+ unsigned int chan_last_rx, chan_last_tx;
+ /* assigned channels, may be invalid with given frame length or mode */
+ u8 channels[MAX_CHANNELS];
+ int msg_count;
+};
+
+/* NPE message structure */
+struct msg {
+#ifdef __ARMEB__
+ u8 cmd, unused, hss_port, index;
+ union {
+ struct { u8 data8a, data8b, data8c, data8d; };
+ struct { u16 data16a, data16b; };
+ struct { u32 data32; };
+ };
+#else
+ u8 index, hss_port, unused, cmd;
+ union {
+ struct { u8 data8d, data8c, data8b, data8a; };
+ struct { u16 data16b, data16a; };
+ struct { u32 data32; };
+ };
+#endif
+};
+
+/* HDLC packet descriptor */
+struct desc {
+ u32 next; /* pointer to next buffer, unused */
+
+#ifdef __ARMEB__
+ 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;
+#else
+ u16 pkt_len; /* packet length */
+ u16 buf_len; /* buffer length */
+ u32 data; /* pointer to data buffer in RAM */
+ u16 __reserved;
+ u8 error_count;
+ u8 status;
+#endif
+ u32 __reserved1[4];
+};
+
+
+#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
+ (n) * sizeof(struct desc))
+#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
+
+#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
+ ((n) + RX_DESCS) * sizeof(struct desc))
+#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
+
+#define chan_tx_buf_len(port) (port->frame_size / 8 * CHAN_TX_FRAMES)
+#define chan_tx_lists_len(port) (port->frame_size / 8 * CHAN_TX_LISTS * \
+ sizeof(u32))
+#define chan_rx_buf_len(port) (port->frame_size / 8 * CHAN_RX_FRAMES)
+
+#define chan_tx_buf(port) ((port)->chan_buf)
+#define chan_tx_lists(port) (chan_tx_buf(port) + chan_tx_buf_len(port))
+#define chan_rx_buf(port) (chan_tx_lists(port) + chan_tx_lists_len(port))
+
+#define chan_tx_lists_phys(port) ((port)->chan_tx_buf_phys + \
+ chan_tx_buf_len(port))
+
+static int hss_prepare_chan(struct port *port);
+void hss_chan_stop(struct port *port);
+
+/*****************************************************************************
+ * global variables
+ ****************************************************************************/
+
+static struct class *hss_class;
+static int chan_major;
+static int ports_open;
+static struct dma_pool *dma_pool;
+static spinlock_t npe_lock;
+
+static const struct {
+ int tx, txdone, rx, rxfree, chan;
+}queue_ids[2] = {{HSS0_PKT_TX0_QUEUE, HSS0_PKT_TXDONE_QUEUE, HSS0_PKT_RX_QUEUE,
+ HSS0_PKT_RXFREE0_QUEUE, HSS0_CHL_RXTRIG_QUEUE},
+ {HSS1_PKT_TX0_QUEUE, HSS1_PKT_TXDONE_QUEUE, HSS1_PKT_RX_QUEUE,
+ HSS1_PKT_RXFREE0_QUEUE, HSS1_CHL_RXTRIG_QUEUE},
+};
+
+/*****************************************************************************
+ * utility functions
+ ****************************************************************************/
+
+static inline struct port* dev_to_port(struct net_device *dev)
+{
+ return dev_to_hdlc(dev)->priv;
+}
+
+static inline struct chan_device* inode_to_chan_dev(struct inode *inode)
+{
+ return container_of(inode->i_cdev, struct chan_device, cdev);
+}
+
+#ifndef __ARMEB__
+static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
+{
+ int i;
+ for (i = 0; i < cnt; i++)
+ dest[i] = swab32(src[i]);
+}
+#endif
+
+static int get_number(const char **buf, size_t *len, unsigned int *ptr,
+ unsigned int min, unsigned int max)
+{
+ char *endp;
+ unsigned long val = simple_strtoul(*buf, &endp, 10);
+
+ if (endp == *buf || endp - *buf > *len || val < min || val > max)
+ return -EINVAL;
+ *len -= endp - *buf;
+ *buf = endp;
+ *ptr = val;
+ return 0;
+}
+
+static int parse_channels(const char **buf, size_t *len, u8 *channels)
+{
+ unsigned int ch, next = 0;
+
+ if (*len && (*buf)[*len - 1] == '\n')
+ (*len)--;
+
+ memset(channels, 0, MAX_CHANNELS);
+
+ if (!*len)
+ return 0;
+
+ /* Format: "A,B-C,...", A > B > C */
+ while (1) {
+ if (get_number(buf, len, &ch, next, MAX_CHANNELS - 1))
+ return -EINVAL;
+ channels[ch] = 1;
+ next = ch + 1;
+ if (!*len)
+ break;
+ if (**buf == ',') {
+ (*buf)++;
+ (*len)--;
+ continue;
+ }
+ if (**buf != '-')
+ return -EINVAL;
+ (*buf)++;
+ (*len)--;
+ if (get_number(buf, len, &ch, next, MAX_CHANNELS - 1))
+ return -EINVAL;
+ while (next <= ch)
+ channels[next++] = 1;
+ if (!*len)
+ break;
+ if (**buf != ',')
+ return -EINVAL;
+ (*buf)++;
+ (*len)--;
+ }
+ return 1;
+}
+
+static size_t print_channels(struct port *port, char *buf, u8 id)
+{
+ unsigned int ch, cnt = 0;
+ size_t len = 0;
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ if (port->channels[ch] == id) {
+ if (cnt == 0) {
+ sprintf(buf + len, "%s%u", len ? "," : "", ch);
+ len += strlen(buf + len);
+ }
+ cnt++;
+ } else {
+ if (cnt > 1) {
+ sprintf(buf + len, "-%u", ch - 1);
+ len += strlen(buf + len);
+ }
+ cnt = 0;
+ }
+ if (cnt > 1) {
+ sprintf(buf + len, "-%u", ch - 1);
+ len += strlen(buf + len);
+ }
+
+ buf[len++] = '\n';
+ return len;
+}
+
+static inline unsigned int sub_offset(unsigned int a, unsigned int b,
+ unsigned int modulo)
+{
+ return (modulo /* make sure the result >= 0 */ + a - b) % modulo;
+}
+
+/*****************************************************************************
+ * HSS access
+ ****************************************************************************/
+
+static void hss_config_load(struct port *port)
+{
+ struct msg msg;
+
+ do {
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_LOAD;
+ msg.hss_port = port->id;
+ if (npe_send_message(port->npe, &msg, "HSS_LOAD_CONFIG"))
+ break;
+ if (npe_recv_message(port->npe, &msg, "HSS_LOAD_CONFIG"))
+ break;
+
+ /* HSS_LOAD_CONFIG for port #1 returns port_id = #4 */
+ if (msg.cmd != PORT_CONFIG_LOAD || msg.data32)
+ break;
+
+ /* HDLC may stop working without this */
+ npe_recv_message(port->npe, &msg, "FLUSH_IT");
+ return;
+ } while (0);
+
+ printk(KERN_CRIT "HSS-%i: unable to reload HSS configuration\n",
+ port->id);
+ BUG();
+}
+
+static void hss_config_set_pcr(struct port *port)
+{
+ struct msg msg;
+
+ do {
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_TX_PCR;
+ msg.data32 = PCR_FRM_SYNC_OUTPUT_RISING | PCR_MSB_ENDIAN |
+ PCR_TX_DATA_ENABLE;
+ if (port->frame_size % 8 == 0)
+ msg.data32 |= PCR_SOF_NO_FBIT;
+ if (port->clock_type == CLOCK_INT)
+ msg.data32 |= PCR_SYNC_CLK_DIR_OUTPUT;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_TX_PCR"))
+ break;
+
+ msg.index = HSS_CONFIG_RX_PCR;
+ msg.data32 ^= PCR_TX_DATA_ENABLE | PCR_DCLK_EDGE_RISING;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_RX_PCR"))
+ break;
+ return;
+ } while (0);
+
+ printk(KERN_CRIT "HSS-%i: unable to set HSS PCR registers\n", port->id);
+ BUG();
+}
+
+static void hss_config_set_hdlc_cfg(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_HDLC_CFG_WRITE;
+ msg.hss_port = port->id;
+ msg.data8a = port->hdlc_cfg; /* rx_cfg */
+ msg.data8b = port->hdlc_cfg | (PKT_EXTRA_FLAGS << 3); /* tx_cfg */
+ if (npe_send_message(port->npe, &msg, "HSS_SET_HDLC_CFG")) {
+ printk(KERN_CRIT "HSS-%i: unable to set HSS HDLC"
+ " configuration\n", port->id);
+ BUG();
+ }
+}
+
+static void hss_config_set_core(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_CORE_CR;
+ msg.data32 = (port->loopback ? CCR_LOOPBACK : 0) |
+ (port->id ? CCR_SECOND_HSS : 0);
+ if (npe_send_message(port->npe, &msg, "HSS_SET_CORE_CR")) {
+ printk(KERN_CRIT "HSS-%i: unable to set HSS core control"
+ " register\n", port->id);
+ BUG();
+ }
+}
+
+static void hss_config_set_line(struct port *port)
+{
+ struct msg msg;
+
+ hss_config_set_pcr(port);
+ hss_config_set_core(port);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_CLOCK_CR;
+ msg.data32 = CLK42X_SPEED_2048KHZ /* FIXME */;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_CLOCK_CR")) {
+ printk(KERN_CRIT "HSS-%i: unable to set HSS clock control"
+ " register\n", port->id);
+ BUG();
+ }
+}
+
+static void hss_config_set_rx_frame(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_RX_FCR;
+ msg.data16a = port->frame_sync_offset;
+ msg.data16b = port->frame_size - 1;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_RX_FCR")) {
+ printk(KERN_CRIT "HSS-%i: unable to set HSS RX frame size"
+ " and offset\n", port->id);
+ BUG();
+ }
+}
+
+static void hss_config_set_frame(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_TX_FCR;
+ msg.data16a = TX_FRAME_SYNC_OFFSET;
+ msg.data16b = port->frame_size - 1;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_TX_FCR")) {
+ printk(KERN_CRIT "HSS-%i: unable to set HSS TX frame size"
+ " and offset\n", port->id);
+ BUG();
+ }
+ hss_config_set_rx_frame(port);
+}
+
+static void hss_config_set_lut(struct port *port)
+{
+ struct msg msg;
+ int chan_count = 0, log_chan = 0, i, ch;
+ u32 lut[MAX_CHANNELS / 4];
+
+ memset(lut, 0, sizeof(lut));
+ for (i = 0; i < MAX_CHAN_DEVICES; i++)
+ if (port->chan_devices[i])
+ port->chan_devices[i]->chan_count = 0;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++) {
+ struct chan_device *chdev = NULL;
+ unsigned int entry;
+
+ if (port->channels[ch] < MAX_CHAN_DEVICES /* assigned */)
+ chdev = port->chan_devices[port->channels[ch]];
+
+ if (port->mode == MODE_G704 && ch == 0)
+ entry = TDMMAP_VOICE64K; /* PCM-31 pattern */
+ else if (port->mode == MODE_HDLC ||
+ port->channels[ch] == CHANNEL_HDLC)
+ entry = TDMMAP_HDLC;
+ else if (chdev && chdev->open_count) {
+ entry = TDMMAP_VOICE64K;
+ chdev->log_channels[chdev->chan_count++] = log_chan;
+ } else
+ entry = TDMMAP_UNASSIGNED;
+ if (entry == TDMMAP_VOICE64K) {
+ chan_count++;
+ log_chan++;
+ }
+
+ msg.data32 >>= 2;
+ msg.data32 |= entry << 30;
+
+ if (ch % 16 == 15) {
+ msg.index = HSS_CONFIG_TX_LUT + ((ch / 4) & ~3);
+ if (npe_send_message(port->npe, &msg, "HSS_SET_TX_LUT"))
+ break;
+
+ msg.index += HSS_CONFIG_RX_LUT - HSS_CONFIG_TX_LUT;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_RX_LUT"))
+ break;
+ }
+ }
+ if (ch != MAX_CHANNELS) {
+ printk(KERN_CRIT "HSS-%i: unable to set HSS channel look-up"
+ " table\n", port->id);
+ BUG();
+ }
+
+ hss_config_set_frame(port);
+
+ if (!chan_count)
+ return;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_NUM_CHANS_WRITE;
+ msg.hss_port = port->id;
+ msg.data8a = chan_count;
+ if (npe_send_message(port->npe, &msg, "CHAN_NUM_CHANS_WRITE")) {
+ printk(KERN_CRIT "HSS-%i: unable to set HSS channel count\n",
+ port->id);
+ BUG();
+ }
+
+ /* don't leak data */
+ // FIXME memset(chan_tx_buf(port), 0, CHAN_TX_FRAMES * chan_count);
+ if (port->mode == MODE_G704) /* G.704 PCM-31 sync pattern */
+ for (i = 0; i < CHAN_TX_FRAMES; i += 4)
+ *(u32*)(chan_tx_buf(port) + i) = 0x9BDF9BDF;
+
+ for (i = 0; i < CHAN_TX_LISTS; i++) {
+ u32 phys = port->chan_tx_buf_phys + i * CHAN_TX_LIST_FRAMES;
+ u32 *list = ((u32 *)chan_tx_lists(port)) + i * chan_count;
+ for (ch = 0; ch < chan_count; ch++)
+ list[ch] = phys + ch * CHAN_TX_FRAMES;
+ }
+ dma_sync_single(port->dev, port->chan_tx_buf_phys,
+ chan_tx_buf_len(port) + chan_tx_lists_len(port),
+ DMA_TO_DEVICE);
+}
+
+static u32 hss_config_get_status(struct port *port)
+{
+ struct msg msg;
+
+ do {
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_ERROR_READ;
+ msg.hss_port = port->id;
+ if (npe_send_message(port->npe, &msg, "PORT_ERROR_READ"))
+ break;
+ if (npe_recv_message(port->npe, &msg, "PORT_ERROR_READ"))
+ break;
+
+ return msg.data32;
+ } while (0);
+
+ printk(KERN_CRIT "HSS-%i: unable to read HSS status\n", port->id);
+ BUG();
+}
+
+static void hss_config_start_chan(struct port *port)
+{
+ struct msg msg;
+
+ port->chan_last_tx = 0;
+ port->chan_last_rx = 0;
+
+ do {
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_RX_BUF_ADDR_WRITE;
+ msg.hss_port = port->id;
+ msg.data32 = port->chan_rx_buf_phys;
+ if (npe_send_message(port->npe, &msg, "CHAN_RX_BUF_ADDR_WRITE"))
+ break;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_TX_BUF_ADDR_WRITE;
+ msg.hss_port = port->id;
+ msg.data32 = chan_tx_lists_phys(port);
+ if (npe_send_message(port->npe, &msg, "CHAN_TX_BUF_ADDR_WRITE"))
+ break;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_FLOW_ENABLE;
+ msg.hss_port = port->id;
+ if (npe_send_message(port->npe, &msg, "CHAN_FLOW_ENABLE"))
+ break;
+ port->chan_started = 1;
+ return;
+ } while (0);
+
+ printk(KERN_CRIT "HSS-%i: unable to start channelized flow\n",
+ port->id);
+ BUG();
+}
+
+static void hss_config_stop_chan(struct port *port)
+{
+ struct msg msg;
+
+ if (!port->chan_started)
+ return;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_FLOW_DISABLE;
+ msg.hss_port = port->id;
+ if (npe_send_message(port->npe, &msg, "CHAN_FLOW_DISABLE")) {
+ printk(KERN_CRIT "HSS-%i: unable to stop channelized flow\n",
+ port->id);
+ BUG();
+ }
+ hss_config_get_status(port); /* make sure it's halted */
+}
+
+static void hss_config_start_hdlc(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_FLOW_ENABLE;
+ msg.hss_port = port->id;
+ msg.data32 = 0;
+ if (npe_send_message(port->npe, &msg, "HSS_ENABLE_PKT_PIPE")) {
+ printk(KERN_CRIT "HSS-%i: unable to stop packetized flow\n",
+ port->id);
+ BUG();
+ }
+}
+
+static void hss_config_stop_hdlc(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_FLOW_DISABLE;
+ msg.hss_port = port->id;
+ if (npe_send_message(port->npe, &msg, "HSS_DISABLE_PKT_PIPE")) {
+ printk(KERN_CRIT "HSS-%i: unable to stop packetized flow\n",
+ port->id);
+ BUG();
+ }
+ hss_config_get_status(port); /* make sure it's halted */
+}
+
+static int hss_config_load_firmware(struct port *port)
+{
+ struct msg msg;
+
+ if (port->initialized)
+ return 0;
+
+ if (!npe_running(port->npe)) {
+ int err;
+ if ((err = npe_load_firmware(port->npe, npe_name(port->npe),
+ port->dev)))
+ return err;
+ }
+
+ do {
+ /* HSS main configuration */
+ hss_config_set_line(port);
+
+ hss_config_set_frame(port);
+
+ /* HDLC mode configuration */
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_NUM_PIPES_WRITE;
+ msg.hss_port = port->id;
+ msg.data8a = PKT_NUM_PIPES;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_PKT_PIPES"))
+ break;
+
+ msg.cmd = PKT_PIPE_FIFO_SIZEW_WRITE;
+ msg.data8a = PKT_PIPE_FIFO_SIZEW;
+ if (npe_send_message(port->npe, &msg, "HSS_SET_PKT_FIFO"))
+ break;
+
+ msg.cmd = PKT_PIPE_MODE_WRITE;
+ msg.data8a = NPE_PKT_MODE_HDLC;
+ /* msg.data8b = inv_mask */
+ /* msg.data8c = or_mask */
+ if (npe_send_message(port->npe, &msg, "HSS_SET_PKT_MODE"))
+ break;
+
+ msg.cmd = PKT_PIPE_RX_SIZE_WRITE;
+ msg.data16a = HDLC_MAX_MRU; /* including CRC */
+ if (npe_send_message(port->npe, &msg, "HSS_SET_PKT_RX_SIZE"))
+ break;
+
+ msg.cmd = PKT_PIPE_IDLE_PATTERN_WRITE;
+ msg.data32 = 0x7F7F7F7F; /* ??? FIXME */
+ if (npe_send_message(port->npe, &msg, "HSS_SET_PKT_IDLE"))
+ break;
+
+ /* Channelized operation settings */
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_TX_BLK_CFG_WRITE;
+ msg.hss_port = port->id;
+ msg.data8b = (CHAN_TX_LIST_FRAMES & ~7) / 2;
+ msg.data8a = msg.data8b / 4;
+ msg.data8d = CHAN_TX_LIST_FRAMES - msg.data8b;
+ msg.data8c = msg.data8d / 4;
+ if (npe_send_message(port->npe, &msg, "CHAN_TX_BLK_CFG_WRITE"))
+ break;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_RX_BUF_CFG_WRITE;
+ msg.hss_port = port->id;
+ msg.data8a = CHAN_RX_TRIGGER / 8;
+ msg.data8b = CHAN_RX_FRAMES;
+ if (npe_send_message(port->npe, &msg, "CHAN_RX_BUF_CFG_WRITE"))
+ break;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = CHAN_TX_BUF_SIZE_WRITE;
+ msg.hss_port = port->id;
+ msg.data8a = CHAN_TX_LISTS;
+ if (npe_send_message(port->npe, &msg, "CHAN_TX_BUF_SIZE_WRITE"))
+ break;
+
+ port->initialized = 1;
+ return 0;
+ } while (0);
+
+ printk(KERN_CRIT "HSS-%i: unable to start HSS operation\n", port->id);
+ BUG();
+}
+
+/*****************************************************************************
+ * packetized (HDLC) operation
+ ****************************************************************************/
+
+static inline void debug_pkt(struct net_device *dev, const char *func,
+ u8 *data, int len)
+{
+#if DEBUG_PKT_BYTES
+ int i;
+
+ printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
+ for (i = 0; i < len; i++) {
+ if (i >= DEBUG_PKT_BYTES)
+ break;
+ printk(KERN_DEBUG "%s%02X", !(i % 4) ? " " : "", data[i]);
+ }
+ printk(KERN_DEBUG "\n");
+#endif
+}
+
+
+static inline void debug_desc(u32 phys, struct desc *desc)
+{
+#if DEBUG_DESC
+ printk(KERN_DEBUG "%X: %X %3X %3X %08X %X %X\n",
+ phys, desc->next, desc->buf_len, desc->pkt_len,
+ desc->data, desc->status, desc->error_count);
+#endif
+}
+
+static inline void debug_queue(unsigned int queue, int is_get, u32 phys)
+{
+#if DEBUG_QUEUES
+ static struct {
+ int queue;
+ char *name;
+ } names[] = {
+ { HSS0_PKT_TX0_QUEUE, "TX#0 " },
+ { HSS0_PKT_TXDONE_QUEUE, "TX-done#0 " },
+ { HSS0_PKT_RX_QUEUE, "RX#0 " },
+ { HSS0_PKT_RXFREE0_QUEUE, "RX-free#0 " },
+ { HSS1_PKT_TX0_QUEUE, "TX#1 " },
+ { HSS1_PKT_TXDONE_QUEUE, "TX-done#1 " },
+ { HSS1_PKT_RX_QUEUE, "RX#1 " },
+ { HSS1_PKT_RXFREE0_QUEUE, "RX-free#1 " },
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(names); i++)
+ if (names[i].queue == queue)
+ break;
+
+ printk(KERN_DEBUG "Queue %i %s%s %X\n", queue,
+ i < ARRAY_SIZE(names) ? names[i].name : "",
+ is_get ? "->" : "<-", phys);
+#endif
+}
+
+static inline u32 queue_get_entry(unsigned int queue)
+{
+ u32 phys = qmgr_get_entry(queue);
+ debug_queue(queue, 1, phys);
+ return phys;
+}
+
+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 = queue_get_entry(queue)))
+ 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(phys, &tab[n_desc]);
+ BUG_ON(tab[n_desc].next);
+ return n_desc;
+}
+
+static inline void queue_put_desc(unsigned int queue, u32 phys,
+ struct desc *desc)
+{
+ debug_queue(queue, 0, phys);
+ debug_desc(phys, desc);
+ BUG_ON(phys & 0x1F);
+ qmgr_put_entry(queue, phys);
+ BUG_ON(qmgr_stat_overflow(queue));
+}
+
+
+static inline void dma_unmap_tx(struct port *port, struct desc *desc)
+{
+#ifdef __ARMEB__
+ dma_unmap_single(&port->netdev->dev, desc->data,
+ desc->buf_len, DMA_TO_DEVICE);
+#else
+ dma_unmap_single(&port->netdev->dev, desc->data & ~3,
+ ALIGN((desc->data & 3) + desc->buf_len, 4),
+ DMA_TO_DEVICE);
+#endif
+}
+
+
+static void hss_hdlc_set_carrier(void *pdev, int carrier)
+{
+ struct net_device *netdev = pdev;
+ struct port *port = dev_to_port(netdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ port->carrier = carrier;
+ if (!port->loopback) {
+ if (carrier)
+ netif_carrier_on(netdev);
+ else
+ netif_carrier_off(netdev);
+ }
+ spin_unlock_irqrestore(&npe_lock, flags);
+}
+
+static void hss_hdlc_rx_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct port *port = dev_to_port(dev);
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_rx_irq\n", dev->name);
+#endif
+ qmgr_disable_irq(queue_ids[port->id].rx);
+ netif_rx_schedule(dev, &port->napi);
+}
+
+static int hss_hdlc_poll(struct napi_struct *napi, int budget)
+{
+ struct port *port = container_of(napi, struct port, napi);
+ struct net_device *dev = port->netdev;
+ unsigned int rxq = queue_ids[port->id].rx;
+ unsigned int rxfreeq = queue_ids[port->id].rxfree;
+ struct net_device_stats *stats = hdlc_stats(dev);
+ int received = 0;
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll\n", dev->name);
+#endif
+
+ while (received < budget) {
+ struct sk_buff *skb;
+ struct desc *desc;
+ int n;
+#ifdef __ARMEB__
+ struct sk_buff *temp;
+ u32 phys;
+#endif
+
+ if ((n = queue_get_desc(rxq, port, 0)) < 0) {
+ received = 0; /* No packet received */
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll"
+ " netif_rx_complete\n", dev->name);
+#endif
+ netif_rx_complete(dev, napi);
+ qmgr_enable_irq(rxq);
+ if (!qmgr_stat_empty(rxq) &&
+ netif_rx_reschedule(dev, napi)) {
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll"
+ " netif_rx_reschedule succeeded\n",
+ dev->name);
+#endif
+ qmgr_disable_irq(rxq);
+ continue;
+ }
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll all done\n",
+ dev->name);
+#endif
+ return 0; /* all work done */
+ }
+
+ desc = rx_desc_ptr(port, n);
+#if 0 /* FIXME - error_count counts modulo 256, perhaps we should use it */
+ if (desc->error_count)
+ printk(KERN_DEBUG "%s: hss_hdlc_poll status 0x%02X"
+ " errors %u\n", dev->name, desc->status,
+ desc->error_count);
+#endif
+ skb = NULL;
+ switch (desc->status) {
+ case 0:
+#ifdef __ARMEB__
+ if ((skb = netdev_alloc_skb(dev, RX_SIZE)) != NULL) {
+ phys = dma_map_single(&dev->dev, skb->data,
+ RX_SIZE,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(phys)) {
+ dev_kfree_skb(skb);
+ skb = NULL;
+ }
+ }
+#else
+ skb = netdev_alloc_skb(dev, desc->pkt_len);
+#endif
+ if (!skb)
+ 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 "%s: hss_hdlc_poll: status 0x%02X"
+ " errors %u\n", dev->name, desc->status,
+ desc->error_count);
+ stats->rx_errors++;
+ }
+
+ if (!skb) {
+ /* put the desc back on RX-ready queue */
+ desc->buf_len = RX_SIZE;
+ desc->pkt_len = desc->status = 0;
+ queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+ continue;
+ }
+
+ /* process received frame */
+#ifdef __ARMEB__
+ temp = skb;
+ skb = port->rx_buff_tab[n];
+ dma_unmap_single(&dev->dev, desc->data,
+ RX_SIZE, DMA_FROM_DEVICE);
+#else
+ dma_sync_single(&dev->dev, desc->data,
+ RX_SIZE, DMA_FROM_DEVICE);
+ memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
+ ALIGN(desc->pkt_len, 4) / 4);
+#endif
+ skb_put(skb, desc->pkt_len);
+
+ debug_pkt(dev, "hss_hdlc_poll", skb->data, skb->len);
+
+ skb->protocol = hdlc_type_trans(skb, dev);
+ dev->last_rx = jiffies;
+ stats->rx_packets++;
+ stats->rx_bytes += skb->len;
+ netif_receive_skb(skb);
+
+ /* put the new buffer on RX-free queue */
+#ifdef __ARMEB__
+ port->rx_buff_tab[n] = temp;
+ desc->data = phys;
+#endif
+ desc->buf_len = RX_SIZE;
+ desc->pkt_len = 0;
+ queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+ received++;
+ }
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_hdlc_poll: end, not all work done\n");
+#endif
+ return received; /* not all work done */
+}
+
+
+static void hss_hdlc_txdone_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct port *port = dev_to_port(dev);
+ struct net_device_stats *stats = hdlc_stats(dev);
+ int n_desc;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG DRV_NAME ": hss_hdlc_txdone_irq\n");
+#endif
+ while ((n_desc = queue_get_desc(queue_ids[port->id].txdone,
+ port, 1)) >= 0) {
+ struct desc *desc;
+ int start;
+
+ desc = tx_desc_ptr(port, n_desc);
+
+ stats->tx_packets++;
+ stats->tx_bytes += desc->pkt_len;
+
+ dma_unmap_tx(port, desc);
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_txdone_irq free %p\n",
+ dev->name, port->tx_buff_tab[n_desc]);
+#endif
+ free_buffer_irq(port->tx_buff_tab[n_desc]);
+ port->tx_buff_tab[n_desc] = NULL;
+
+ start = qmgr_stat_empty(port->plat->txreadyq);
+ queue_put_desc(port->plat->txreadyq,
+ tx_desc_phys(port, n_desc), desc);
+ if (start) {
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_txdone_irq xmit"
+ " ready\n", dev->name);
+#endif
+ netif_wake_queue(dev);
+ }
+ }
+}
+
+static int hss_hdlc_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ struct net_device_stats *stats = hdlc_stats(dev);
+ unsigned int txreadyq = port->plat->txreadyq;
+ int len, offset, bytes, n;
+ void *mem;
+ u32 phys;
+ struct desc *desc;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit\n", dev->name);
+#endif
+
+ if (unlikely(skb->len > HDLC_MAX_MRU)) {
+ dev_kfree_skb(skb);
+ stats->tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ debug_pkt(dev, "hss_hdlc_xmit", skb->data, skb->len);
+
+ len = skb->len;
+#ifdef __ARMEB__
+ offset = 0; /* no need to keep alignment */
+ bytes = len;
+ mem = skb->data;
+#else
+ offset = (int)skb->data & 3; /* keep 32-bit alignment */
+ bytes = ALIGN(offset + len, 4);
+ if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
+ dev_kfree_skb(skb);
+ stats->tx_dropped++;
+ return NETDEV_TX_OK;
+ }
+ memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
+ dev_kfree_skb(skb);
+#endif
+
+ phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
+ if (dma_mapping_error(phys)) {
+#ifdef __ARMEB__
+ dev_kfree_skb(skb);
+#else
+ kfree(mem);
+#endif
+ stats->tx_dropped++;
+ return NETDEV_TX_OK;
+ }
+
+ n = queue_get_desc(txreadyq, port, 1);
+ BUG_ON(n < 0);
+ desc = tx_desc_ptr(port, n);
+
+#ifdef __ARMEB__
+ port->tx_buff_tab[n] = skb;
+#else
+ port->tx_buff_tab[n] = mem;
+#endif
+ desc->data = phys + offset;
+ desc->buf_len = desc->pkt_len = len;
+
+ wmb();
+ queue_put_desc(queue_ids[port->id].tx, tx_desc_phys(port, n), desc);
+ dev->trans_start = jiffies;
+
+ if (qmgr_stat_empty(txreadyq)) {
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit queue full\n", dev->name);
+#endif
+ netif_stop_queue(dev);
+ /* we could miss TX ready interrupt */
+ if (!qmgr_stat_empty(txreadyq)) {
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit ready again\n",
+ dev->name);
+#endif
+ netif_wake_queue(dev);
+ }
+ }
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit end\n", dev->name);
+#endif
+ return NETDEV_TX_OK;
+}
+
+
+static int request_hdlc_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(port->plat->txreadyq, TX_DESCS, 0, 0);
+ if (err)
+ goto rel_tx;
+
+ err = qmgr_request_queue(queue_ids[port->id].txdone, TX_DESCS, 0, 0);
+ if (err)
+ goto rel_txready;
+ return 0;
+
+rel_txready:
+ qmgr_release_queue(port->plat->txreadyq);
+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);
+ printk(KERN_DEBUG "%s: unable to request hardware queues\n",
+ port->netdev->name);
+ return err;
+}
+
+static void release_hdlc_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);
+ qmgr_release_queue(port->plat->txreadyq);
+}
+
+static int init_hdlc_queues(struct port *port)
+{
+ int i;
+
+ if (!ports_open)
+ if (!(dma_pool = dma_pool_create(DRV_NAME, NULL,
+ POOL_ALLOC_SIZE, 32, 0)))
+ 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_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
+ memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
+
+ /* Setup RX buffers */
+ for (i = 0; i < RX_DESCS; i++) {
+ struct desc *desc = rx_desc_ptr(port, i);
+ buffer_t *buff;
+ void *data;
+#ifdef __ARMEB__
+ if (!(buff = netdev_alloc_skb(port->netdev, RX_SIZE)))
+ return -ENOMEM;
+ data = buff->data;
+#else
+ if (!(buff = kmalloc(RX_SIZE, GFP_KERNEL)))
+ return -ENOMEM;
+ data = buff;
+#endif
+ desc->buf_len = RX_SIZE;
+ desc->data = dma_map_single(&port->netdev->dev, data,
+ RX_SIZE, DMA_FROM_DEVICE);
+ if (dma_mapping_error(desc->data)) {
+ free_buffer(buff);
+ return -EIO;
+ }
+ port->rx_buff_tab[i] = buff;
+ }
+
+ return 0;
+}
+
+static void destroy_hdlc_queues(struct port *port)
+{
+ int i;
+
+ if (port->desc_tab) {
+ for (i = 0; i < RX_DESCS; i++) {
+ struct desc *desc = rx_desc_ptr(port, i);
+ buffer_t *buff = port->rx_buff_tab[i];
+ if (buff) {
+ dma_unmap_single(&port->netdev->dev,
+ desc->data, RX_SIZE,
+ DMA_FROM_DEVICE);
+ free_buffer(buff);
+ }
+ }
+ for (i = 0; i < TX_DESCS; i++) {
+ struct desc *desc = tx_desc_ptr(port, i);
+ buffer_t *buff = port->tx_buff_tab[i];
+ if (buff) {
+ dma_unmap_tx(port, desc);
+ free_buffer(buff);
+ }
+ }
+ 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_hdlc_open(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ unsigned long flags;
+ int i, err = 0;
+
+ if ((err = hdlc_open(dev)))
+ return err;
+
+ if ((err = request_hdlc_queues(port)))
+ goto err_hdlc_close;
+
+ if ((err = init_hdlc_queues(port)))
+ goto err_destroy_queues;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (port->mode == MODE_G704 && port->channels[0] == CHANNEL_HDLC) {
+ err = -EBUSY; /* channel #0 is used for G.704 framing */
+ goto err_unlock;
+ }
+ if (port->mode != MODE_HDLC)
+ for (i = port->frame_size / 8; i < MAX_CHANNELS; i++)
+ if (port->channels[i] == CHANNEL_HDLC) {
+ err = -ECHRNG; /* frame too short */
+ goto err_unlock;
+ }
+
+ if ((err = hss_config_load_firmware(port)))
+ goto err_unlock;
+
+ if (!port->chan_open_count && port->plat->open)
+ if ((err = port->plat->open(port->id, dev,
+ hss_hdlc_set_carrier)))
+ goto err_unlock;
+
+ if (port->mode == MODE_G704 && !port->chan_open_count)
+ if ((err = hss_prepare_chan(port)))
+ goto err_plat_close;
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ /* Populate queues with buffers, no failure after this point */
+ for (i = 0; i < TX_DESCS; i++)
+ queue_put_desc(port->plat->txreadyq,
+ tx_desc_phys(port, i), tx_desc_ptr(port, i));
+
+ for (i = 0; i < RX_DESCS; i++)
+ queue_put_desc(queue_ids[port->id].rxfree,
+ rx_desc_phys(port, i), rx_desc_ptr(port, i));
+
+ napi_enable(&port->napi);
+ netif_start_queue(dev);
+
+ qmgr_set_irq(queue_ids[port->id].rx, QUEUE_IRQ_SRC_NOT_EMPTY,
+ hss_hdlc_rx_irq, dev);
+
+ qmgr_set_irq(queue_ids[port->id].txdone, QUEUE_IRQ_SRC_NOT_EMPTY,
+ hss_hdlc_txdone_irq, dev);
+ qmgr_enable_irq(queue_ids[port->id].txdone);
+
+ ports_open++;
+ port->hdlc_open = 1;
+
+ hss_config_set_hdlc_cfg(port);
+ hss_config_set_lut(port);
+ hss_config_load(port);
+
+ if (port->mode == MODE_G704 && !port->chan_open_count)
+ hss_config_start_chan(port);
+
+ hss_config_start_hdlc(port);
+
+ /* we may already have RX data, enables IRQ */
+ netif_rx_schedule(dev, &port->napi);
+ return 0;
+
+err_plat_close:
+ if (!port->chan_open_count && port->plat->close)
+ port->plat->close(port->id, dev);
+err_unlock:
+ spin_unlock_irqrestore(&npe_lock, flags);
+err_destroy_queues:
+ destroy_hdlc_queues(port);
+ release_hdlc_queues(port);
+err_hdlc_close:
+ hdlc_close(dev);
+ return err;
+}
+
+static int hss_hdlc_close(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ unsigned long flags;
+ int i, buffs = RX_DESCS; /* allocated RX buffers */
+
+ spin_lock_irqsave(&npe_lock, flags);
+ ports_open--;
+ port->hdlc_open = 0;
+ qmgr_disable_irq(queue_ids[port->id].rx);
+ netif_stop_queue(dev);
+ napi_disable(&port->napi);
+
+ hss_config_stop_hdlc(port);
+
+ if (port->mode == MODE_G704 && !port->chan_open_count)
+ hss_chan_stop(port);
+
+ while (queue_get_desc(queue_ids[port->id].rxfree, port, 0) >= 0)
+ buffs--;
+ while (queue_get_desc(queue_ids[port->id].rx, port, 0) >= 0)
+ buffs--;
+
+ if (buffs)
+ printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
+ " left in NPE\n", dev->name, buffs);
+
+ buffs = TX_DESCS;
+ while (queue_get_desc(queue_ids[port->id].tx, port, 1) >= 0)
+ buffs--; /* cancel TX */
+
+ i = 0;
+ do {
+ while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
+ buffs--;
+ if (!buffs)
+ break;
+ } while (++i < MAX_CLOSE_WAIT);
+
+ if (buffs)
+ printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
+ "left in NPE\n", dev->name, buffs);
+#if DEBUG_CLOSE
+ if (!buffs)
+ printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
+#endif
+ qmgr_disable_irq(queue_ids[port->id].txdone);
+
+ if (!port->chan_open_count && port->plat->close)
+ port->plat->close(port->id, dev);
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ destroy_hdlc_queues(port);
+ release_hdlc_queues(port);
+ hdlc_close(dev);
+ return 0;
+}
+
+
+static int hss_hdlc_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_hdlc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
+ struct port *port = dev_to_port(dev);
+ unsigned long flags;
+ int i, clk;
+
+ 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;
+ }
+ memset(&new_line, 0, sizeof(new_line));
+ new_line.clock_type = port->clock_type;
+ new_line.clock_rate = port->clock_rate;
+ new_line.loopback = port->loopback;
+ if (copy_to_user(line, &new_line, size))
+ return -EFAULT;
+
+ if (!port->chan_buf)
+ return 0;
+
+ dma_sync_single(&dev->dev, port->chan_rx_buf_phys,
+ chan_rx_buf_len(port), DMA_FROM_DEVICE);
+ printk(KERN_DEBUG "RX:\n");
+ for (i = 0; i < chan_rx_buf_len(port); i++) {
+ if (i % 32 == 0)
+ printk(KERN_DEBUG "%03X ", i);
+ printk("%02X%c", chan_rx_buf(port)[i],
+ (i + 1) % 32 ? ' ' : '\n');
+ }
+
+#if 0
+ printk(KERN_DEBUG "TX:\n");
+ for (i = 0; i < /*CHAN_TX_FRAMES * 2*/ chan_tx_buf_len(port)
+ + chan_tx_lists_len(port); i++) {
+ if (i % 32 == 0)
+ printk(KERN_DEBUG "%03X ", i);
+ printk("%02X%c", chan_tx_buf(port)[i],
+ (i + 1) % 32 ? ' ' : '\n');
+ }
+#endif
+ port->msg_count = 10;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL:
+ case IF_IFACE_V35:
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ 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;
+
+ port->clock_type = clk; /* Update settings */
+ /* FIXME port->clock_rate = new_line.clock_rate */;
+ port->loopback = new_line.loopback;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (port->chan_open_count || port->hdlc_open) {
+ hss_config_set_line(port);
+ hss_config_load(port);
+ }
+ if (port->loopback || port->carrier)
+ netif_carrier_on(port->netdev);
+ else
+ netif_carrier_off(port->netdev);
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifr, cmd);
+ }
+}
+
+/*****************************************************************************
+ * channelized (G.704) operation
+ ****************************************************************************/
+
+static void g704_rx_framer(struct port *port, unsigned int offset)
+{
+ u8 *data = chan_rx_buf(port) + sub_offset(offset, CHAN_RX_TRIGGER,
+ CHAN_RX_FRAMES);
+ unsigned int bit, frame, bad_even = 0, bad_odd = 0, cnt;
+ unsigned int is_first = port->just_set_offset;
+ u8 zeros_even, zeros_odd, ones_even, ones_odd;
+ enum alignment aligned;
+
+ port->just_set_offset = 0;
+ dma_sync_single(port->dev, port->chan_rx_buf_phys, CHAN_RX_FRAMES,
+ DMA_FROM_DEVICE);
+
+ /* check if aligned first */
+ for (frame = 0; frame < CHAN_RX_TRIGGER &&
+ (bad_even <= MAX_CHAN_RX_BAD_SYNC ||
+ bad_odd <= MAX_CHAN_RX_BAD_SYNC); frame += 2) {
+ u8 ve = data[frame];
+ u8 vo = data[frame + 1];
+
+ if ((ve & 0x7F) != 0x1B || !(vo & 0x40))
+ bad_even++;
+
+ if ((vo & 0x7F) != 0x1B || !(ve & 0x40))
+ bad_odd++;
+ }
+
+ if (bad_even <= MAX_CHAN_RX_BAD_SYNC)
+ aligned = EVEN_FIRST;
+ else if (bad_odd <= MAX_CHAN_RX_BAD_SYNC)
+ aligned = ODD_FIRST;
+ else
+ aligned = NOT_ALIGNED;
+
+ if (aligned != NOT_ALIGNED) {
+ if (aligned == port->aligned)
+ return; /* no change */
+ if (printk_ratelimit())
+ printk(KERN_INFO "HSS-%i: synchronized at %u (%s frame"
+ " first)\n", port->id, port->frame_sync_offset,
+ aligned == EVEN_FIRST ? "even" : "odd");
+ port->aligned = aligned;
+
+ atomic_inc(&port->chan_tx_irq_number);
+ wake_up_interruptible(&port->chan_tx_waitq);
+ atomic_inc(&port->chan_rx_irq_number);
+ wake_up_interruptible(&port->chan_rx_waitq);
+ return;
+ }
+
+ /* not aligned */
+ if (port->aligned != NOT_ALIGNED && printk_ratelimit()) {
+ printk(KERN_INFO "HSS-%i: lost alignment\n", port->id);
+ port->aligned = NOT_ALIGNED;
+#if DEBUG_FRAMER
+ for (cnt = 0; cnt < CHAN_RX_FRAMES; cnt++)
+ printk("%c%02X%s", cnt == offset ? '>' : ' ',
+ chan_rx_buf(port)[cnt],
+ (cnt + 1) % 32 ? "" : "\n");
+#endif
+
+ for (cnt = 0; cnt < MAX_CHAN_DEVICES; cnt++)
+ if (port->chan_devices[cnt]) {
+ set_bit(TX_ERROR_BIT, &port->chan_devices[cnt]
+ ->errors_bitmap);
+ set_bit(RX_ERROR_BIT, &port->chan_devices[cnt]
+ ->errors_bitmap);
+ }
+ atomic_inc(&port->chan_tx_irq_number);
+ wake_up_interruptible(&port->chan_tx_waitq);
+ atomic_inc(&port->chan_rx_irq_number);
+ wake_up_interruptible(&port->chan_rx_waitq);
+ }
+
+ if (is_first)
+ return;
+
+ zeros_even = zeros_odd = 0;
+ ones_even = ones_odd = 0xFF;
+ for (frame = 0; frame < CHAN_RX_TRIGGER; frame += 2) {
+ zeros_even |= data[frame];
+ zeros_odd |= data[frame + 1];
+ ones_even &= data[frame];
+ ones_odd &= data[frame + 1];
+ }
+
+ for (bit = 0; bit < 7; bit++) {
+ if ((zeros_even & ~0x9B) == 0 && (ones_even & 0x1B) == 0x1B &&
+ (ones_odd & 0x40) == 0x40) {
+ aligned = EVEN_FIRST; /* maybe */
+ break;
+ }
+ if ((zeros_odd & ~0x9B) == 0 && (ones_odd & 0x1B) == 0x1B &&
+ (ones_even & 0x40) == 0x40) {
+ aligned = ODD_FIRST; /* maybe */
+ break;
+ }
+ zeros_even <<= 1;
+ ones_even = ones_even << 1 | 1;
+ zeros_odd <<= 1;
+ ones_odd = ones_odd << 1 | 1;
+ }
+
+ port->frame_sync_offset += port->frame_size - bit;
+ port->frame_sync_offset %= port->frame_size;
+ port->just_set_offset = 1;
+
+#if DEBUG_FRAMER
+ if (bit == 7)
+ printk(KERN_DEBUG "HSS-%i: trying frame sync at %u\n",
+ port->id, port->frame_sync_offset);
+ else
+ printk(KERN_DEBUG "HSS-%i: found possible frame sync pattern at"
+ " %u (%s frame first)\n", port->id,
+ port->frame_sync_offset,
+ aligned == EVEN_FIRST ? "even" : "odd");
+#endif
+
+ hss_config_set_rx_frame(port);
+ hss_config_load(port);
+}
+
+static void chan_process_tx_irq(struct chan_device *chan_dev, int offset)
+{
+ /* in bytes */
+ unsigned int buff_len = CHAN_TX_FRAMES * chan_dev->chan_count;
+ unsigned int list_len = CHAN_TX_LIST_FRAMES * chan_dev->chan_count;
+ int eaten, last_offset = chan_dev->port->chan_last_tx * list_len;
+
+ offset *= list_len;
+ eaten = sub_offset(offset, last_offset, buff_len);
+
+ if (chan_dev->tx_count > eaten + 2 * list_len) {
+ /* two pages must be reserved for the transmitter */
+ chan_dev->tx_first += eaten;
+ chan_dev->tx_first %= buff_len;
+ chan_dev->tx_count -= eaten;
+ } else {
+ /* FIXME check
+ 0
+ 1 tx_first (may still be transmited)
+ 2 tx_offset (currently reported by the NPE)
+ 3 tx_first + 2 * list_len (free to write here)
+ 4
+ 5
+ */
+
+ /* printk(KERN_DEBUG "TX buffer underflow\n"); */
+ chan_dev->tx_first = sub_offset(offset, list_len, buff_len);
+ chan_dev->tx_count = 2 * list_len; /* reserve */
+ set_bit(TX_ERROR_BIT, &chan_dev->errors_bitmap);
+ }
+}
+
+static void chan_process_rx_irq(struct chan_device *chan_dev, int offset)
+{
+ /* in bytes */
+ unsigned int buff_len = CHAN_RX_FRAMES * chan_dev->chan_count;
+ unsigned int trig_len = CHAN_RX_TRIGGER * chan_dev->chan_count;
+ int last_offset = chan_dev->port->chan_last_rx * chan_dev->chan_count;
+
+ offset *= chan_dev->chan_count;
+ chan_dev->rx_count += sub_offset(offset, last_offset + trig_len,
+ buff_len) + trig_len;
+ if (chan_dev->rx_count > buff_len - 2 * trig_len) {
+ /* two pages - offset[0] and offset[1] are lost - FIXME check */
+ /* printk(KERN_DEBUG "RX buffer overflow\n"); */
+ chan_dev->rx_first = (offset + 2 * trig_len) % buff_len;
+ chan_dev->rx_count = buff_len - 2 * trig_len;
+ set_bit(RX_ERROR_BIT, &chan_dev->errors_bitmap);
+ }
+}
+
+static void hss_chan_irq(void *pdev)
+{
+ struct port *port = pdev;
+ u32 v;
+
+#if DEBUG_RX
+ printk(KERN_DEBUG DRV_NAME ": hss_chan_irq\n");
+#endif
+ spin_lock(&npe_lock);
+ while ((v = qmgr_get_entry(queue_ids[port->id].chan))) {
+ unsigned int first, errors, tx_list, rx_frame;
+ int i, bad;
+
+ first = v >> 24;
+ errors = (v >> 16) & 0xFF;
+ tx_list = (v >> 8) & 0xFF;
+ rx_frame = v & 0xFF;
+
+ if (port->msg_count) {
+ printk(KERN_DEBUG "chan_irq hss %i jiffies %lu first"
+ " 0x%02X errors 0x%02X tx_list 0x%02X rx_frame"
+ " 0x%02X\n", port->id, jiffies, first, errors,
+ tx_list, rx_frame);
+ port->msg_count--;
+ }
+
+ BUG_ON(rx_frame % CHAN_RX_TRIGGER);
+ BUG_ON(rx_frame >= CHAN_RX_FRAMES);
+ BUG_ON(tx_list >= CHAN_TX_LISTS);
+
+ bad = port->mode == MODE_G704 && port->aligned == NOT_ALIGNED;
+ if (!bad && tx_list != port->chan_last_tx) {
+ if (tx_list != (port->chan_last_tx + 1) % CHAN_TX_LISTS)
+ printk(KERN_DEBUG "Skipped an IRQ? Tx last %i"
+ " current %i\n", port->chan_last_tx,
+ tx_list);
+ for (i = 0; i < MAX_CHAN_DEVICES; i++) {
+ if (!port->chan_devices[i] ||
+ !port->chan_devices[i]->open_count)
+ continue;
+ chan_process_tx_irq(port->chan_devices[i],
+ tx_list);
+ }
+ atomic_inc(&port->chan_tx_irq_number);
+#if 0
+ printk(KERN_DEBUG "wakeing up TX jiff %lu\n",
+ jiffies, errors);
+#endif
+ wake_up_interruptible(&port->chan_tx_waitq);
+ }
+
+ if (rx_frame != (port->chan_last_rx + CHAN_RX_TRIGGER) %
+ CHAN_RX_FRAMES)
+ printk(KERN_DEBUG "Skipped an IRQ? Rx last %i"
+ " current %i\n", port->chan_last_rx, rx_frame);
+
+ if (port->mode == MODE_G704)
+ g704_rx_framer(port, rx_frame);
+
+ if (!bad &&
+ (port->mode != MODE_G704 || port->aligned != NOT_ALIGNED)) {
+ for (i = 0; i < MAX_CHAN_DEVICES; i++) {
+ if (!port->chan_devices[i] ||
+ !port->chan_devices[i]->open_count)
+ continue;
+ chan_process_rx_irq(port->chan_devices[i],
+ rx_frame);
+ }
+ atomic_inc(&port->chan_rx_irq_number);
+ wake_up_interruptible(&port->chan_rx_waitq);
+ }
+ port->chan_last_tx = tx_list;
+ port->chan_last_rx = rx_frame;
+ }
+ spin_unlock(&npe_lock);
+}
+
+
+static int hss_prepare_chan(struct port *port)
+{
+ int err;
+
+ if ((err = hss_config_load_firmware(port)))
+ return err;
+
+ if ((err = qmgr_request_queue(queue_ids[port->id].chan,
+ CHAN_QUEUE_LEN, 0, 0)))
+ return err;
+
+ if (!(port->chan_buf = kmalloc(chan_tx_buf_len(port) +
+ chan_tx_lists_len(port) +
+ chan_rx_buf_len(port), GFP_KERNEL))) {
+ goto release_queue;
+ err = -ENOBUFS;
+ }
+
+ port->chan_tx_buf_phys = dma_map_single(port->dev, chan_tx_buf(port),
+ chan_tx_buf_len(port) +
+ chan_tx_lists_len(port),
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(port->chan_tx_buf_phys)) {
+ err = -EIO;
+ goto free;
+ }
+
+ port->chan_rx_buf_phys = dma_map_single(port->dev, chan_rx_buf(port),
+ chan_rx_buf_len(port),
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(port->chan_rx_buf_phys)) {
+ err = -EIO;
+ goto unmap_tx;
+ }
+
+ qmgr_set_irq(queue_ids[port->id].chan, QUEUE_IRQ_SRC_NOT_EMPTY,
+ hss_chan_irq, port);
+ qmgr_enable_irq(queue_ids[port->id].chan);
+ hss_chan_irq(port);
+ return 0;
+
+unmap_tx:
+ dma_unmap_single(port->dev, port->chan_tx_buf_phys,
+ chan_tx_buf_len(port) + chan_tx_lists_len(port),
+ DMA_TO_DEVICE);
+free:
+ kfree(port->chan_buf);
+ port->chan_buf = NULL;
+release_queue:
+ qmgr_release_queue(queue_ids[port->id].chan);
+ return err;
+}
+
+void hss_chan_stop(struct port *port)
+{
+ if (!port->chan_open_count && !port->hdlc_open)
+ qmgr_disable_irq(queue_ids[port->id].chan);
+
+ hss_config_stop_chan(port);
+ hss_config_set_lut(port);
+ hss_config_load(port);
+
+ if (!port->chan_open_count && !port->hdlc_open) {
+ dma_unmap_single(port->dev, port->chan_tx_buf_phys,
+ chan_tx_buf_len(port) +
+ chan_tx_lists_len(port), DMA_TO_DEVICE);
+ dma_unmap_single(port->dev, port->chan_rx_buf_phys,
+ chan_rx_buf_len(port), DMA_FROM_DEVICE);
+ kfree(port->chan_buf);
+ port->chan_buf = NULL;
+ qmgr_release_queue(queue_ids[port->id].chan);
+ }
+}
+
+static int hss_chan_open(struct inode *inode, struct file *file)
+{
+ struct chan_device *chan_dev = inode_to_chan_dev(inode);
+ struct port *port = chan_dev->port;
+ unsigned long flags;
+ int i, err = 0;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (chan_dev->open_count) {
+ if (chan_dev->excl_open || (file->f_flags & O_EXCL))
+ err = -EBUSY;
+ else
+ chan_dev->open_count++;
+ goto out;
+ }
+
+ if (port->mode == MODE_HDLC) {
+ err = -ENOSYS;
+ goto out;
+ }
+
+ if (port->mode == MODE_G704 && port->channels[0] == chan_dev->id) {
+ err = -EBUSY; /* channel #0 is used for G.704 signaling */
+ goto out;
+ }
+ for (i = MAX_CHANNELS; i > port->frame_size / 8; i--)
+ if (port->channels[i - 1] == chan_dev->id) {
+ err = -ECHRNG; /* frame too short */
+ goto out;
+ }
+
+ chan_dev->rx_first = chan_dev->tx_first = 0;
+ chan_dev->rx_count = chan_dev->tx_count = 0;
+ clear_bit(TX_ERROR_BIT, &chan_dev->errors_bitmap);
+ clear_bit(RX_ERROR_BIT, &chan_dev->errors_bitmap);
+
+ if (!port->chan_open_count && !port->hdlc_open) {
+ if (port->plat->open)
+ if ((err = port->plat->open(port->id, port->netdev,
+ hss_hdlc_set_carrier)))
+ goto out;
+ if ((err = hss_prepare_chan(port))) {
+ if (port->plat->close)
+ port->plat->close(port->id, port->netdev);
+ goto out;
+ }
+ }
+
+ hss_config_stop_chan(port);
+ chan_dev->open_count++;
+ port->chan_open_count++;
+ chan_dev->excl_open = !!file->f_flags & O_EXCL;
+
+ hss_config_set_lut(port);
+ hss_config_load(port);
+ hss_config_start_chan(port);
+out:
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return err;
+}
+
+static int hss_chan_release(struct inode *inode, struct file *file)
+{
+ struct chan_device *chan_dev = inode_to_chan_dev(inode);
+ struct port *port = chan_dev->port;
+ unsigned long flags;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (!--chan_dev->open_count) {
+ if (!--port->chan_open_count && !port->hdlc_open) {
+ hss_chan_stop(port);
+ if (port->plat->close)
+ port->plat->close(port->id, port->netdev);
+ } else {
+ hss_config_stop_chan(port);
+ hss_config_set_lut(port);
+ hss_config_set_line(port); //
+ hss_config_start_chan(port);
+ }
+ }
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return 0;
+}
+
+static ssize_t hss_chan_read(struct file *file, char __user *buf, size_t count,
+ loff_t *f_pos)
+{
+ struct chan_device *chan_dev = inode_to_chan_dev
+ (file->f_path.dentry->d_inode);
+ struct port *port = chan_dev->port;
+ unsigned long flags;
+ u8 *rx_buf;
+ int res = 0, loops = 0;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ while (1) {
+ int prev_irq = atomic_read(&port->chan_rx_irq_number);
+#if 0
+ if (test_and_clear_bit(RX_ERROR_BIT, &chan_dev->errors_bitmap)
+ || (port->mode == G704 && port->aligned == NOT_ALIGNED)) {
+ res = -EIO;
+ goto out;
+ }
+#endif
+ if (count == 0)
+ goto out; /* no need to wait */
+
+ if (chan_dev->rx_count)
+ break;
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ loops++;
+ if ((res = wait_event_interruptible
+ (port->chan_rx_waitq,
+ atomic_read(&port->chan_rx_irq_number) != prev_irq)))
+ goto out;
+ spin_lock_irqsave(&npe_lock, flags);
+ continue;
+ }
+
+ dma_sync_single(port->dev, port->chan_rx_buf_phys,
+ chan_rx_buf_len(port), DMA_FROM_DEVICE);
+
+#if 0
+ if (loops > 1)
+ printk(KERN_DEBUG "ENTRY rx_first %u rx_count %u count %i"
+ " last_rx %u loops %i\n", chan_dev->rx_first,
+ chan_dev->rx_count, count, port->chan_last_rx, loops);
+#endif
+ rx_buf = chan_rx_buf(port);
+ while (chan_dev->rx_count > 0 && res < count) {
+ unsigned int chan = chan_dev->rx_first % chan_dev->chan_count;
+ unsigned int frame = chan_dev->rx_first / chan_dev->chan_count;
+
+ chan = chan_dev->log_channels[chan];
+ if (put_user(rx_buf[chan * CHAN_RX_FRAMES + frame], buf++)) {
+ res = -EFAULT;
+ goto out;
+ }
+ chan_dev->rx_first++;
+ chan_dev->rx_first %= CHAN_RX_FRAMES * chan_dev->chan_count;
+ chan_dev->rx_count--;
+ res++;
+ }
+out:
+#if 0
+ printk(KERN_DEBUG "EXIT rx_first %u rx_count %u res %i\n",
+ chan_dev->rx_first, chan_dev->rx_count, res);
+#endif
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return res;
+}
+
+static ssize_t hss_chan_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ struct chan_device *chan_dev = inode_to_chan_dev
+ (file->f_path.dentry->d_inode);
+ struct port *port = chan_dev->port;
+ unsigned long flags;
+ u8 *tx_buf;
+ int res = 0, loops = 0;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ while (1) {
+ int prev_irq = atomic_read(&port->chan_tx_irq_number);
+#if 0
+ if (test_and_clear_bit(TX_ERROR_BIT, &chan_dev->errors_bitmap)
+ || (port->mode == G704 && port->aligned == NOT_ALIGNED)) {
+ res = -EIO;
+ goto out;
+ }
+#endif
+ if (count == 0)
+ goto out; /* no need to wait */
+
+ if (chan_dev->tx_count < CHAN_TX_FRAMES * chan_dev->chan_count)
+ break;
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ loops++;
+ if ((res = wait_event_interruptible
+ (port->chan_tx_waitq,
+ atomic_read (&port->chan_tx_irq_number) != prev_irq)))
+ goto out;
+ spin_lock_irqsave(&npe_lock, flags);
+ continue;
+ }
+
+#if 0
+ if (loops > 1)
+ printk(KERN_DEBUG "ENTRY TX_first %u tx_count %u count %i"
+ " last_tx %u loops %i\n", chan_dev->tx_first,
+ chan_dev->tx_count, count, port->chan_last_tx, loops);
+#endif
+ tx_buf = chan_tx_buf(port);
+ while (chan_dev->tx_count < CHAN_TX_FRAMES * chan_dev->chan_count &&
+ res < count) {
+ unsigned int tail, chan, frame;
+
+ tail = (chan_dev->tx_first + chan_dev->tx_count) %
+ (CHAN_TX_FRAMES * chan_dev->chan_count);
+ chan = tail % chan_dev->chan_count;
+ frame = tail / chan_dev->chan_count;
+ chan = chan_dev->log_channels[chan];
+
+ if (get_user(tx_buf[chan * CHAN_TX_FRAMES + frame], buf++)) {
+ printk(KERN_DEBUG "BUG? TX %u %u %u\n",
+ tail, chan, frame);
+ res = -EFAULT;
+ goto out_sync;
+ }
+ chan_dev->tx_count++;
+ res++;
+ }
+out_sync:
+ dma_sync_single(port->dev, port->chan_tx_buf_phys,
+ chan_tx_buf_len(port), DMA_TO_DEVICE);
+out:
+#if 0
+ printk(KERN_DEBUG "EXIT TX_first %u tx_count %u res %i\n",
+ chan_dev->tx_first, chan_dev->tx_count, res);
+#endif
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return res;
+}
+
+
+static unsigned int hss_chan_poll(struct file *file, poll_table *wait)
+{
+ struct chan_device *chan_dev = inode_to_chan_dev
+ (file->f_path.dentry->d_inode);
+ struct port *port = chan_dev->port;
+ unsigned long flags;
+ unsigned int mask = 0;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ poll_wait(file, &port->chan_tx_waitq, wait);
+ poll_wait(file, &port->chan_rx_waitq, wait);
+
+ if (chan_dev->tx_count < CHAN_TX_FRAMES * chan_dev->chan_count)
+ mask |= POLLOUT | POLLWRNORM;
+ if (chan_dev->rx_count)
+ mask |= POLLIN | POLLRDNORM;
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return mask;
+}
+
+/*****************************************************************************
+ * channelized device sysfs attributes
+ ****************************************************************************/
+
+static ssize_t chan_show_chan(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct chan_device *chan_dev = dev_get_drvdata(dev);
+
+ return print_channels(chan_dev->port, buf, chan_dev->id);
+}
+
+static ssize_t chan_set_chan(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct chan_device *chan_dev = dev_get_drvdata(dev);
+ struct port *port = chan_dev->port;
+ unsigned long flags;
+ unsigned int ch;
+ size_t orig_len = len;
+ int err;
+
+ if (len && buf[len - 1] == '\n')
+ len--;
+
+ if (len != 7 || memcmp(buf, "destroy", 7))
+ return -EINVAL;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ cdev_del(&chan_dev->cdev);
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ if (port->channels[ch] == chan_dev->id)
+ port->channels[ch] = CHANNEL_UNUSED;
+ port->chan_devices[chan_dev->id] = NULL;
+ kfree(chan_dev);
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ if ((err = device_schedule_callback(dev, device_unregister)))
+ return err;
+ return orig_len;
+}
+
+static struct device_attribute chan_attr =
+ __ATTR(channels, 0644, chan_show_chan, chan_set_chan);
+
+/*****************************************************************************
+ * main sysfs attributes
+ ****************************************************************************/
+
+static const struct file_operations chan_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = hss_chan_read,
+ .write = hss_chan_write,
+ .poll = hss_chan_poll,
+ .open = hss_chan_open,
+ .release = hss_chan_release,
+};
+
+static ssize_t create_chan(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct port *port = dev_get_drvdata(dev);
+ struct chan_device *chan_dev;
+ u8 channels[MAX_CHANNELS];
+ size_t orig_len = len;
+ unsigned long flags;
+ unsigned int ch, id;
+ int minor, err;
+
+ if ((err = parse_channels(&buf, &len, channels)) < 1)
+ return err;
+
+ if (!(chan_dev = kzalloc(sizeof(struct chan_device), GFP_KERNEL)))
+ return -ENOBUFS;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (port->mode != MODE_RAW && port->mode != MODE_G704) {
+ err = -EINVAL;
+ goto free;
+ }
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ if (channels[ch] && port->channels[ch] != CHANNEL_UNUSED) {
+ printk(KERN_DEBUG "Channel #%i already in use\n", ch);
+ err = -EBUSY;
+ goto free;
+ }
+
+ for (id = 0; id < MAX_CHAN_DEVICES; id++)
+ if (port->chan_devices[id] == NULL)
+ break;
+
+ if (id == MAX_CHAN_DEVICES) {
+ err = -EBUSY;
+ goto free;
+ }
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ if (channels[ch])
+ break;
+
+ minor = port->id * MAX_CHAN_DEVICES + ch;
+ chan_dev->id = id;
+ chan_dev->port = port;
+ chan_dev->dev = device_create(hss_class, dev, MKDEV(chan_major, minor),
+ "hss%uch%u", port->id, ch);
+ if (IS_ERR(chan_dev->dev)) {
+ err = PTR_ERR(chan_dev->dev);
+ goto free;
+ }
+
+ cdev_init(&chan_dev->cdev, &chan_fops);
+ chan_dev->cdev.owner = THIS_MODULE;
+ if ((err = cdev_add(&chan_dev->cdev, MKDEV(chan_major, minor), 1)))
+ goto destroy_device;
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ if (channels[ch])
+ port->channels[ch] = id;
+ port->chan_devices[id] = chan_dev;
+ dev_set_drvdata(chan_dev->dev, chan_dev);
+ BUG_ON(device_create_file(chan_dev->dev, &chan_attr));
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return orig_len;
+
+destroy_device:
+ device_unregister(chan_dev->dev);
+free:
+ kfree(chan_dev);
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return err;
+}
+
+static ssize_t show_hdlc_chan(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return print_channels(dev_get_drvdata(dev), buf, CHANNEL_HDLC);
+}
+
+static ssize_t set_hdlc_chan(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct port *port = dev_get_drvdata(dev);
+ u8 channels[MAX_CHANNELS];
+ size_t orig_len = len;
+ unsigned long flags;
+ unsigned int ch;
+ int err;
+
+ if ((err = parse_channels(&buf, &len, channels)) < 0)
+ return err;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (port->mode != MODE_RAW && port->mode != MODE_G704) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ if (channels[ch] &&
+ port->channels[ch] != CHANNEL_UNUSED &&
+ port->channels[ch] != CHANNEL_HDLC) {
+ printk(KERN_DEBUG "Channel #%i already in use\n", ch);
+ err = -EBUSY;
+ goto err;
+ }
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++)
+ if (channels[ch])
+ port->channels[ch] = CHANNEL_HDLC;
+ else if (port->channels[ch] == CHANNEL_HDLC)
+ port->channels[ch] = CHANNEL_UNUSED;
+
+ if (port->chan_open_count || port->hdlc_open) {
+ hss_config_set_lut(port);
+ hss_config_load(port);
+ }
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return orig_len;
+
+err:
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return err;
+}
+
+static ssize_t show_clock_type(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct port *port = dev_get_drvdata(dev);
+
+ strcpy(buf, port->clock_type == CLOCK_INT ? "int\n" : "ext\n");
+ return 5;
+}
+
+static ssize_t set_clock_type(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct port *port = dev_get_drvdata(dev);
+ size_t orig_len = len;
+ unsigned long flags;
+ unsigned int clk, err;
+
+ if (len && buf[len - 1] == '\n')
+ len--;
+
+ if (len != 3)
+ return -EINVAL;
+ if (!memcmp(buf, "ext", 3))
+ clk = CLOCK_EXT;
+ else if (!memcmp(buf, "int", 3))
+ clk = CLOCK_INT;
+ else
+ return -EINVAL;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ if (port->plat->set_clock)
+ clk = port->plat->set_clock(port->id, clk);
+ if (clk != CLOCK_EXT && clk != CLOCK_INT) {
+ err = -EINVAL; /* plat->set_clock shouldn't change the state */
+ goto err;
+ }
+ port->clock_type = clk;
+ if (port->chan_open_count || port->hdlc_open) {
+ hss_config_set_line(port);
+ hss_config_load(port);
+ }
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ return orig_len;
+err:
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return err;
+}
+
+static ssize_t show_clock_rate(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct port *port = dev_get_drvdata(dev);
+
+ sprintf(buf, "%u\n", port->clock_rate);
+ return strlen(buf) + 1;
+}
+
+static ssize_t set_clock_rate(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+#if 0
+ struct port *port = dev_get_drvdata(dev);
+ size_t orig_len = len;
+ unsigned long flags;
+ unsigned int rate;
+
+ if (len && buf[len - 1] == '\n')
+ len--;
+
+ if (get_number(&buf, &len, &rate, 1, 0xFFFFFFFFu))
+ return -EINVAL;
+ if (len)
+ return -EINVAL;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ port->clock_rate = rate;
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return orig_len;
+#endif
+ return -EINVAL; /* FIXME not yet supported */
+}
+
+static ssize_t show_frame_size(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct port *port = dev_get_drvdata(dev);
+
+ if (port->mode != MODE_RAW && port->mode != MODE_G704)
+ return -EINVAL;
+
+ sprintf(buf, "%u\n", port->frame_size);
+ return strlen(buf) + 1;
+}
+
+static ssize_t set_frame_size(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct port *port = dev_get_drvdata(dev);
+ size_t ret = len;
+ unsigned long flags;
+ unsigned int size;
+
+ if (len && buf[len - 1] == '\n')
+ len--;
+
+ if (get_number(&buf, &len, &size, MIN_FRAME_SIZE, MAX_FRAME_SIZE))
+ return -EINVAL;
+ if (len || size % 8 > 1)
+ return -EINVAL;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ if (port->mode != MODE_RAW && port->mode != MODE_G704)
+ ret = -EINVAL;
+ else if (!port->chan_open_count && !port->hdlc_open)
+ ret = -EBUSY;
+ else {
+ port->frame_size = size;
+ port->frame_sync_offset = 0;
+ }
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return ret;
+}
+
+static ssize_t show_frame_offset(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct port *port = dev_get_drvdata(dev);
+
+ sprintf(buf, "%u\n", port->frame_sync_offset);
+ return strlen(buf) + 1;
+}
+
+static ssize_t set_frame_offset(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct port *port = dev_get_drvdata(dev);
+ size_t orig_len = len;
+ unsigned long flags;
+ unsigned int offset;
+
+ if (len && buf[len - 1] == '\n')
+ len--;
+
+ if (get_number(&buf, &len, &offset, 0, port->frame_size - 1))
+ return -EINVAL;
+ if (len)
+ return -EINVAL;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ port->frame_sync_offset = offset;
+ if (port->chan_open_count || port->hdlc_open) {
+ hss_config_set_rx_frame(port);
+ hss_config_load(port);
+ }
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return orig_len;
+}
+
+static ssize_t show_loopback(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct port *port = dev_get_drvdata(dev);
+
+ sprintf(buf, "%u\n", port->loopback);
+ return strlen(buf) + 1;
+}
+
+static ssize_t set_loopback(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct port *port = dev_get_drvdata(dev);
+ size_t orig_len = len;
+ unsigned long flags;
+ unsigned int lb;
+
+ if (len && buf[len - 1] == '\n')
+ len--;
+
+ if (get_number(&buf, &len, &lb, 0, 1))
+ return -EINVAL;
+ if (len)
+ return -EINVAL;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (port->loopback != lb) {
+ port->loopback = lb;
+ if (port->chan_open_count || port->hdlc_open) {
+ hss_config_set_core(port);
+ hss_config_load(port);
+ }
+ if (port->loopback || port->carrier)
+ netif_carrier_on(port->netdev);
+ else
+ netif_carrier_off(port->netdev);
+ }
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return orig_len;
+}
+
+static ssize_t show_mode(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct port *port = dev_get_drvdata(dev);
+
+ switch(port->mode) {
+ case MODE_RAW:
+ strcpy(buf, "raw\n");
+ break;
+ case MODE_G704:
+ strcpy(buf, "g704\n");
+ break;
+ default:
+ strcpy(buf, "hdlc\n");
+ break;
+ }
+ return strlen(buf) + 1;
+}
+
+static ssize_t set_mode(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct port *port = dev_get_drvdata(dev);
+ size_t ret = len;
+ unsigned long flags;
+
+ if (len && buf[len - 1] == '\n')
+ len--;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (port->chan_open_count || port->hdlc_open) {
+ ret = -EBUSY;
+ } else if (len == 4 && !memcmp(buf, "hdlc", 4))
+ port->mode = MODE_HDLC;
+ else if (len == 3 && !memcmp(buf, "raw", 3))
+ port->mode = MODE_RAW;
+ else if (len == 4 && !memcmp(buf, "g704", 4))
+ port->mode = MODE_G704;
+ else
+ ret = -EINVAL;
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+ return ret;
+}
+
+static struct device_attribute hss_attrs[] = {
+ __ATTR(create_chan, 0200, NULL, create_chan),
+ __ATTR(hdlc_chan, 0644, show_hdlc_chan, set_hdlc_chan),
+ __ATTR(clock_type, 0644, show_clock_type, set_clock_type),
+ __ATTR(clock_rate, 0644, show_clock_rate, set_clock_rate),
+ __ATTR(frame_size, 0644, show_frame_size, set_frame_size),
+ __ATTR(frame_offset, 0644, show_frame_offset, set_frame_offset),
+ __ATTR(loopback, 0644, show_loopback, set_loopback),
+ __ATTR(mode, 0644, show_mode, set_mode),
+};
+
+/*****************************************************************************
+ * initialization
+ ****************************************************************************/
+
+static int __devinit hss_init_one(struct platform_device *pdev)
+{
+ struct port *port;
+ struct net_device *dev;
+ hdlc_device *hdlc;
+ int i, 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->dev = &pdev->dev;
+ port->plat = pdev->dev.platform_data;
+ if ((port->netdev = dev = alloc_hdlcdev(port)) == NULL) {
+ err = -ENOMEM;
+ goto err_plat;
+ }
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ hdlc = dev_to_hdlc(dev);
+ hdlc->attach = hss_hdlc_attach;
+ hdlc->xmit = hss_hdlc_xmit;
+ dev->open = hss_hdlc_open;
+ dev->stop = hss_hdlc_close;
+ dev->do_ioctl = hss_hdlc_ioctl;
+ dev->tx_queue_len = 100;
+ port->clock_type = CLOCK_EXT;
+ port->clock_rate = 2048000;
+ port->frame_size = 256; /* E1 */
+ memset(port->channels, CHANNEL_UNUSED, sizeof(port->channels));
+ init_waitqueue_head(&port->chan_tx_waitq);
+ init_waitqueue_head(&port->chan_rx_waitq);
+ netif_napi_add(dev, &port->napi, hss_hdlc_poll, NAPI_WEIGHT);
+
+ if ((err = register_hdlc_device(dev))) /* HDLC mode by default */
+ goto err_free_netdev;
+
+ for (i = 0; i < ARRAY_SIZE(hss_attrs); i++)
+ BUG_ON(device_create_file(port->dev, &hss_attrs[i]));
+
+ 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);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hss_attrs); i++)
+ device_remove_file(port->dev, &hss_attrs[i]);
+
+ 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)
+{
+ int err;
+ dev_t rdev;
+
+ if ((ixp4xx_read_feature_bits() &
+ (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS)) !=
+ (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS))
+ return -ENOSYS;
+
+ if ((err = alloc_chrdev_region(&rdev, 0, HSS_COUNT * MAX_CHAN_DEVICES,
+ "hss")))
+ return err;
+
+ spin_lock_init(&npe_lock);
+
+ if (IS_ERR(hss_class = class_create(THIS_MODULE, "hss"))) {
+ printk(KERN_ERR "Can't register device class 'hss'\n");
+ err = PTR_ERR(hss_class);
+ goto free_chrdev;
+ }
+ if ((err = platform_driver_register(&drv)))
+ goto destroy_class;
+
+ chan_major = MAJOR(rdev);
+ return 0;
+
+destroy_class:
+ class_destroy(hss_class);
+free_chrdev:
+ unregister_chrdev_region(MKDEV(chan_major, 0),
+ HSS_COUNT * MAX_CHAN_DEVICES);
+ return err;
+}
+
+static void __exit hss_cleanup_module(void)
+{
+ platform_driver_unregister(&drv);
+ class_destroy(hss_class);
+ unregister_chrdev_region(MKDEV(chan_major, 0),
+ HSS_COUNT * MAX_CHAN_DEVICES);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa");
+MODULE_DESCRIPTION("Intel IXP4xx HSS driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:ixp4xx_hss");
+module_init(hss_init_module);
+module_exit(hss_cleanup_module);
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