diff options
Diffstat (limited to 'drivers/tty/ipwireless')
| -rw-r--r-- | drivers/tty/ipwireless/Makefile | 8 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/hardware.c | 1770 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/hardware.h | 63 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/main.c | 356 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/main.h | 69 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/network.c | 517 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/network.h | 54 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/setup_protocol.h | 109 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/tty.c | 635 | ||||
| -rw-r--r-- | drivers/tty/ipwireless/tty.h | 46 |
10 files changed, 3627 insertions, 0 deletions
diff --git a/drivers/tty/ipwireless/Makefile b/drivers/tty/ipwireless/Makefile new file mode 100644 index 000000000..fe2e17309 --- /dev/null +++ b/drivers/tty/ipwireless/Makefile @@ -0,0 +1,8 @@ +# +# Makefile for the IPWireless driver +# + +obj-$(CONFIG_IPWIRELESS) += ipwireless.o + +ipwireless-y := hardware.o main.o network.o tty.o + diff --git a/drivers/tty/ipwireless/hardware.c b/drivers/tty/ipwireless/hardware.c new file mode 100644 index 000000000..6bbf35682 --- /dev/null +++ b/drivers/tty/ipwireless/hardware.c @@ -0,0 +1,1770 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/slab.h> + +#include "hardware.h" +#include "setup_protocol.h" +#include "network.h" +#include "main.h" + +static void ipw_send_setup_packet(struct ipw_hardware *hw); +static void handle_received_SETUP_packet(struct ipw_hardware *ipw, + unsigned int address, + const unsigned char *data, int len, + int is_last); +static void ipwireless_setup_timer(struct timer_list *t); +static void handle_received_CTRL_packet(struct ipw_hardware *hw, + unsigned int channel_idx, const unsigned char *data, int len); + +/*#define TIMING_DIAGNOSTICS*/ + +#ifdef TIMING_DIAGNOSTICS + +static struct timing_stats { + unsigned long last_report_time; + unsigned long read_time; + unsigned long write_time; + unsigned long read_bytes; + unsigned long write_bytes; + unsigned long start_time; +}; + +static void start_timing(void) +{ + timing_stats.start_time = jiffies; +} + +static void end_read_timing(unsigned length) +{ + timing_stats.read_time += (jiffies - start_time); + timing_stats.read_bytes += length + 2; + report_timing(); +} + +static void end_write_timing(unsigned length) +{ + timing_stats.write_time += (jiffies - start_time); + timing_stats.write_bytes += length + 2; + report_timing(); +} + +static void report_timing(void) +{ + unsigned long since = jiffies - timing_stats.last_report_time; + + /* If it's been more than one second... */ + if (since >= HZ) { + int first = (timing_stats.last_report_time == 0); + + timing_stats.last_report_time = jiffies; + if (!first) + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": %u us elapsed - read %lu bytes in %u us, wrote %lu bytes in %u us\n", + jiffies_to_usecs(since), + timing_stats.read_bytes, + jiffies_to_usecs(timing_stats.read_time), + timing_stats.write_bytes, + jiffies_to_usecs(timing_stats.write_time)); + + timing_stats.read_time = 0; + timing_stats.write_time = 0; + timing_stats.read_bytes = 0; + timing_stats.write_bytes = 0; + } +} +#else +static void start_timing(void) { } +static void end_read_timing(unsigned length) { } +static void end_write_timing(unsigned length) { } +#endif + +/* Imported IPW definitions */ + +#define LL_MTU_V1 318 +#define LL_MTU_V2 250 +#define LL_MTU_MAX (LL_MTU_V1 > LL_MTU_V2 ? LL_MTU_V1 : LL_MTU_V2) + +#define PRIO_DATA 2 +#define PRIO_CTRL 1 +#define PRIO_SETUP 0 + +/* Addresses */ +#define ADDR_SETUP_PROT 0 + +/* Protocol ids */ +enum { + /* Identifier for the Com Data protocol */ + TL_PROTOCOLID_COM_DATA = 0, + + /* Identifier for the Com Control protocol */ + TL_PROTOCOLID_COM_CTRL = 1, + + /* Identifier for the Setup protocol */ + TL_PROTOCOLID_SETUP = 2 +}; + +/* Number of bytes in NL packet header (cannot do + * sizeof(nl_packet_header) since it's a bitfield) */ +#define NL_FIRST_PACKET_HEADER_SIZE 3 + +/* Number of bytes in NL packet header (cannot do + * sizeof(nl_packet_header) since it's a bitfield) */ +#define NL_FOLLOWING_PACKET_HEADER_SIZE 1 + +struct nl_first_packet_header { + unsigned char protocol:3; + unsigned char address:3; + unsigned char packet_rank:2; + unsigned char length_lsb; + unsigned char length_msb; +}; + +struct nl_packet_header { + unsigned char protocol:3; + unsigned char address:3; + unsigned char packet_rank:2; +}; + +/* Value of 'packet_rank' above */ +#define NL_INTERMEDIATE_PACKET 0x0 +#define NL_LAST_PACKET 0x1 +#define NL_FIRST_PACKET 0x2 + +union nl_packet { + /* Network packet header of the first packet (a special case) */ + struct nl_first_packet_header hdr_first; + /* Network packet header of the following packets (if any) */ + struct nl_packet_header hdr; + /* Complete network packet (header + data) */ + unsigned char rawpkt[LL_MTU_MAX]; +} __attribute__ ((__packed__)); + +#define HW_VERSION_UNKNOWN -1 +#define HW_VERSION_1 1 +#define HW_VERSION_2 2 + +/* IPW I/O ports */ +#define IOIER 0x00 /* Interrupt Enable Register */ +#define IOIR 0x02 /* Interrupt Source/ACK register */ +#define IODCR 0x04 /* Data Control Register */ +#define IODRR 0x06 /* Data Read Register */ +#define IODWR 0x08 /* Data Write Register */ +#define IOESR 0x0A /* Embedded Driver Status Register */ +#define IORXR 0x0C /* Rx Fifo Register (Host to Embedded) */ +#define IOTXR 0x0E /* Tx Fifo Register (Embedded to Host) */ + +/* I/O ports and bit definitions for version 1 of the hardware */ + +/* IER bits*/ +#define IER_RXENABLED 0x1 +#define IER_TXENABLED 0x2 + +/* ISR bits */ +#define IR_RXINTR 0x1 +#define IR_TXINTR 0x2 + +/* DCR bits */ +#define DCR_RXDONE 0x1 +#define DCR_TXDONE 0x2 +#define DCR_RXRESET 0x4 +#define DCR_TXRESET 0x8 + +/* I/O ports and bit definitions for version 2 of the hardware */ + +struct MEMCCR { + unsigned short reg_config_option; /* PCCOR: Configuration Option Register */ + unsigned short reg_config_and_status; /* PCCSR: Configuration and Status Register */ + unsigned short reg_pin_replacement; /* PCPRR: Pin Replacemant Register */ + unsigned short reg_socket_and_copy; /* PCSCR: Socket and Copy Register */ + unsigned short reg_ext_status; /* PCESR: Extendend Status Register */ + unsigned short reg_io_base; /* PCIOB: I/O Base Register */ +}; + +struct MEMINFREG { + unsigned short memreg_tx_old; /* TX Register (R/W) */ + unsigned short pad1; + unsigned short memreg_rx_done; /* RXDone Register (R/W) */ + unsigned short pad2; + unsigned short memreg_rx; /* RX Register (R/W) */ + unsigned short pad3; + unsigned short memreg_pc_interrupt_ack; /* PC intr Ack Register (W) */ + unsigned short pad4; + unsigned long memreg_card_present;/* Mask for Host to check (R) for + * CARD_PRESENT_VALUE */ + unsigned short memreg_tx_new; /* TX2 (new) Register (R/W) */ +}; + +#define CARD_PRESENT_VALUE (0xBEEFCAFEUL) + +#define MEMTX_TX 0x0001 +#define MEMRX_RX 0x0001 +#define MEMRX_RX_DONE 0x0001 +#define MEMRX_PCINTACKK 0x0001 + +#define NL_NUM_OF_PRIORITIES 3 +#define NL_NUM_OF_PROTOCOLS 3 +#define NL_NUM_OF_ADDRESSES NO_OF_IPW_CHANNELS + +struct ipw_hardware { + unsigned int base_port; + short hw_version; + unsigned short ll_mtu; + spinlock_t lock; + + int initializing; + int init_loops; + struct timer_list setup_timer; + + /* Flag if hw is ready to send next packet */ + int tx_ready; + /* Count of pending packets to be sent */ + int tx_queued; + struct list_head tx_queue[NL_NUM_OF_PRIORITIES]; + + int rx_bytes_queued; + struct list_head rx_queue; + /* Pool of rx_packet structures that are not currently used. */ + struct list_head rx_pool; + int rx_pool_size; + /* True if reception of data is blocked while userspace processes it. */ + int blocking_rx; + /* True if there is RX data ready on the hardware. */ + int rx_ready; + unsigned short last_memtx_serial; + /* + * Newer versions of the V2 card firmware send serial numbers in the + * MemTX register. 'serial_number_detected' is set true when we detect + * a non-zero serial number (indicating the new firmware). Thereafter, + * the driver can safely ignore the Timer Recovery re-sends to avoid + * out-of-sync problems. + */ + int serial_number_detected; + struct work_struct work_rx; + + /* True if we are to send the set-up data to the hardware. */ + int to_setup; + + /* Card has been removed */ + int removed; + /* Saved irq value when we disable the interrupt. */ + int irq; + /* True if this driver is shutting down. */ + int shutting_down; + /* Modem control lines */ + unsigned int control_lines[NL_NUM_OF_ADDRESSES]; + struct ipw_rx_packet *packet_assembler[NL_NUM_OF_ADDRESSES]; + + struct tasklet_struct tasklet; + + /* The handle for the network layer, for the sending of events to it. */ + struct ipw_network *network; + struct MEMINFREG __iomem *memory_info_regs; + struct MEMCCR __iomem *memregs_CCR; + void (*reboot_callback) (void *data); + void *reboot_callback_data; + + unsigned short __iomem *memreg_tx; +}; + +/* + * Packet info structure for tx packets. + * Note: not all the fields defined here are required for all protocols + */ +struct ipw_tx_packet { + struct list_head queue; + /* channel idx + 1 */ + unsigned char dest_addr; + /* SETUP, CTRL or DATA */ + unsigned char protocol; + /* Length of data block, which starts at the end of this structure */ + unsigned short length; + /* Sending state */ + /* Offset of where we've sent up to so far */ + unsigned long offset; + /* Count of packet fragments, starting at 0 */ + int fragment_count; + + /* Called after packet is sent and before is freed */ + void (*packet_callback) (void *cb_data, unsigned int packet_length); + void *callback_data; +}; + +/* Signals from DTE */ +#define COMCTRL_RTS 0 +#define COMCTRL_DTR 1 + +/* Signals from DCE */ +#define COMCTRL_CTS 2 +#define COMCTRL_DCD 3 +#define COMCTRL_DSR 4 +#define COMCTRL_RI 5 + +struct ipw_control_packet_body { + /* DTE signal or DCE signal */ + unsigned char sig_no; + /* 0: set signal, 1: clear signal */ + unsigned char value; +} __attribute__ ((__packed__)); + +struct ipw_control_packet { + struct ipw_tx_packet header; + struct ipw_control_packet_body body; +}; + +struct ipw_rx_packet { + struct list_head queue; + unsigned int capacity; + unsigned int length; + unsigned int protocol; + unsigned int channel_idx; +}; + +static char *data_type(const unsigned char *buf, unsigned length) +{ + struct nl_packet_header *hdr = (struct nl_packet_header *) buf; + + if (length == 0) + return " "; + + if (hdr->packet_rank & NL_FIRST_PACKET) { + switch (hdr->protocol) { + case TL_PROTOCOLID_COM_DATA: return "DATA "; + case TL_PROTOCOLID_COM_CTRL: return "CTRL "; + case TL_PROTOCOLID_SETUP: return "SETUP"; + default: return "???? "; + } + } else + return " "; +} + +#define DUMP_MAX_BYTES 64 + +static void dump_data_bytes(const char *type, const unsigned char *data, + unsigned length) +{ + char prefix[56]; + + sprintf(prefix, IPWIRELESS_PCCARD_NAME ": %s %s ", + type, data_type(data, length)); + print_hex_dump_bytes(prefix, 0, (void *)data, + length < DUMP_MAX_BYTES ? length : DUMP_MAX_BYTES); +} + +static void swap_packet_bitfield_to_le(unsigned char *data) +{ +#ifdef __BIG_ENDIAN_BITFIELD + unsigned char tmp = *data, ret = 0; + + /* + * transform bits from aa.bbb.ccc to ccc.bbb.aa + */ + ret |= (tmp & 0xc0) >> 6; + ret |= (tmp & 0x38) >> 1; + ret |= (tmp & 0x07) << 5; + *data = ret & 0xff; +#endif +} + +static void swap_packet_bitfield_from_le(unsigned char *data) +{ +#ifdef __BIG_ENDIAN_BITFIELD + unsigned char tmp = *data, ret = 0; + + /* + * transform bits from ccc.bbb.aa to aa.bbb.ccc + */ + ret |= (tmp & 0xe0) >> 5; + ret |= (tmp & 0x1c) << 1; + ret |= (tmp & 0x03) << 6; + *data = ret & 0xff; +#endif +} + +static void do_send_fragment(struct ipw_hardware *hw, unsigned char *data, + unsigned length) +{ + unsigned i; + unsigned long flags; + + start_timing(); + BUG_ON(length > hw->ll_mtu); + + if (ipwireless_debug) + dump_data_bytes("send", data, length); + + spin_lock_irqsave(&hw->lock, flags); + + hw->tx_ready = 0; + swap_packet_bitfield_to_le(data); + + if (hw->hw_version == HW_VERSION_1) { + outw((unsigned short) length, hw->base_port + IODWR); + + for (i = 0; i < length; i += 2) { + unsigned short d = data[i]; + __le16 raw_data; + + if (i + 1 < length) + d |= data[i + 1] << 8; + raw_data = cpu_to_le16(d); + outw(raw_data, hw->base_port + IODWR); + } + + outw(DCR_TXDONE, hw->base_port + IODCR); + } else if (hw->hw_version == HW_VERSION_2) { + outw((unsigned short) length, hw->base_port); + + for (i = 0; i < length; i += 2) { + unsigned short d = data[i]; + __le16 raw_data; + + if (i + 1 < length) + d |= data[i + 1] << 8; + raw_data = cpu_to_le16(d); + outw(raw_data, hw->base_port); + } + while ((i & 3) != 2) { + outw((unsigned short) 0xDEAD, hw->base_port); + i += 2; + } + writew(MEMRX_RX, &hw->memory_info_regs->memreg_rx); + } + + spin_unlock_irqrestore(&hw->lock, flags); + + end_write_timing(length); +} + +static void do_send_packet(struct ipw_hardware *hw, struct ipw_tx_packet *packet) +{ + unsigned short fragment_data_len; + unsigned short data_left = packet->length - packet->offset; + unsigned short header_size; + union nl_packet pkt; + + header_size = + (packet->fragment_count == 0) + ? NL_FIRST_PACKET_HEADER_SIZE + : NL_FOLLOWING_PACKET_HEADER_SIZE; + fragment_data_len = hw->ll_mtu - header_size; + if (data_left < fragment_data_len) + fragment_data_len = data_left; + + /* + * hdr_first is now in machine bitfield order, which will be swapped + * to le just before it goes to hw + */ + pkt.hdr_first.protocol = packet->protocol; + pkt.hdr_first.address = packet->dest_addr; + pkt.hdr_first.packet_rank = 0; + + /* First packet? */ + if (packet->fragment_count == 0) { + pkt.hdr_first.packet_rank |= NL_FIRST_PACKET; + pkt.hdr_first.length_lsb = (unsigned char) packet->length; + pkt.hdr_first.length_msb = + (unsigned char) (packet->length >> 8); + } + + memcpy(pkt.rawpkt + header_size, + ((unsigned char *) packet) + sizeof(struct ipw_tx_packet) + + packet->offset, fragment_data_len); + packet->offset += fragment_data_len; + packet->fragment_count++; + + /* Last packet? (May also be first packet.) */ + if (packet->offset == packet->length) + pkt.hdr_first.packet_rank |= NL_LAST_PACKET; + do_send_fragment(hw, pkt.rawpkt, header_size + fragment_data_len); + + /* If this packet has unsent data, then re-queue it. */ + if (packet->offset < packet->length) { + /* + * Re-queue it at the head of the highest priority queue so + * it goes before all other packets + */ + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + list_add(&packet->queue, &hw->tx_queue[0]); + hw->tx_queued++; + spin_unlock_irqrestore(&hw->lock, flags); + } else { + if (packet->packet_callback) + packet->packet_callback(packet->callback_data, + packet->length); + kfree(packet); + } +} + +static void ipw_setup_hardware(struct ipw_hardware *hw) +{ + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + if (hw->hw_version == HW_VERSION_1) { + /* Reset RX FIFO */ + outw(DCR_RXRESET, hw->base_port + IODCR); + /* SB: Reset TX FIFO */ + outw(DCR_TXRESET, hw->base_port + IODCR); + + /* Enable TX and RX interrupts. */ + outw(IER_TXENABLED | IER_RXENABLED, hw->base_port + IOIER); + } else { + /* + * Set INTRACK bit (bit 0), which means we must explicitly + * acknowledge interrupts by clearing bit 2 of reg_config_and_status. + */ + unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status); + + csr |= 1; + writew(csr, &hw->memregs_CCR->reg_config_and_status); + } + spin_unlock_irqrestore(&hw->lock, flags); +} + +/* + * If 'packet' is NULL, then this function allocates a new packet, setting its + * length to 0 and ensuring it has the specified minimum amount of free space. + * + * If 'packet' is not NULL, then this function enlarges it if it doesn't + * have the specified minimum amount of free space. + * + */ +static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw, + struct ipw_rx_packet *packet, + int minimum_free_space) +{ + + if (!packet) { + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + if (!list_empty(&hw->rx_pool)) { + packet = list_first_entry(&hw->rx_pool, + struct ipw_rx_packet, queue); + hw->rx_pool_size--; + spin_unlock_irqrestore(&hw->lock, flags); + list_del(&packet->queue); + } else { + const int min_capacity = + ipwireless_ppp_mru(hw->network) + 2; + int new_capacity; + + spin_unlock_irqrestore(&hw->lock, flags); + new_capacity = + (minimum_free_space > min_capacity + ? minimum_free_space + : min_capacity); + packet = kmalloc(sizeof(struct ipw_rx_packet) + + new_capacity, GFP_ATOMIC); + if (!packet) + return NULL; + packet->capacity = new_capacity; + } + packet->length = 0; + } + + if (packet->length + minimum_free_space > packet->capacity) { + struct ipw_rx_packet *old_packet = packet; + + packet = kmalloc(sizeof(struct ipw_rx_packet) + + old_packet->length + minimum_free_space, + GFP_ATOMIC); + if (!packet) { + kfree(old_packet); + return NULL; + } + memcpy(packet, old_packet, + sizeof(struct ipw_rx_packet) + + old_packet->length); + packet->capacity = old_packet->length + minimum_free_space; + kfree(old_packet); + } + + return packet; +} + +static void pool_free(struct ipw_hardware *hw, struct ipw_rx_packet *packet) +{ + if (hw->rx_pool_size > 6) + kfree(packet); + else { + hw->rx_pool_size++; + list_add(&packet->queue, &hw->rx_pool); + } +} + +static void queue_received_packet(struct ipw_hardware *hw, + unsigned int protocol, + unsigned int address, + const unsigned char *data, int length, + int is_last) +{ + unsigned int channel_idx = address - 1; + struct ipw_rx_packet *packet = NULL; + unsigned long flags; + + /* Discard packet if channel index is out of range. */ + if (channel_idx >= NL_NUM_OF_ADDRESSES) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": data packet has bad address %u\n", address); + return; + } + + /* + * ->packet_assembler is safe to touch unlocked, this is the only place + */ + if (protocol == TL_PROTOCOLID_COM_DATA) { + struct ipw_rx_packet **assem = + &hw->packet_assembler[channel_idx]; + + /* + * Create a new packet, or assembler already contains one + * enlarge it by 'length' bytes. + */ + (*assem) = pool_allocate(hw, *assem, length); + if (!(*assem)) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": no memory for incoming data packet, dropped!\n"); + return; + } + (*assem)->protocol = protocol; + (*assem)->channel_idx = channel_idx; + + /* Append this packet data onto existing data. */ + memcpy((unsigned char *)(*assem) + + sizeof(struct ipw_rx_packet) + + (*assem)->length, data, length); + (*assem)->length += length; + if (is_last) { + packet = *assem; + *assem = NULL; + /* Count queued DATA bytes only */ + spin_lock_irqsave(&hw->lock, flags); + hw->rx_bytes_queued += packet->length; + spin_unlock_irqrestore(&hw->lock, flags); + } + } else { + /* If it's a CTRL packet, don't assemble, just queue it. */ + packet = pool_allocate(hw, NULL, length); + if (!packet) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": no memory for incoming ctrl packet, dropped!\n"); + return; + } + packet->protocol = protocol; + packet->channel_idx = channel_idx; + memcpy((unsigned char *)packet + sizeof(struct ipw_rx_packet), + data, length); + packet->length = length; + } + + /* + * If this is the last packet, then send the assembled packet on to the + * network layer. + */ + if (packet) { + spin_lock_irqsave(&hw->lock, flags); + list_add_tail(&packet->queue, &hw->rx_queue); + /* Block reception of incoming packets if queue is full. */ + hw->blocking_rx = + (hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE); + + spin_unlock_irqrestore(&hw->lock, flags); + schedule_work(&hw->work_rx); + } +} + +/* + * Workqueue callback + */ +static void ipw_receive_data_work(struct work_struct *work_rx) +{ + struct ipw_hardware *hw = + container_of(work_rx, struct ipw_hardware, work_rx); + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + while (!list_empty(&hw->rx_queue)) { + struct ipw_rx_packet *packet = + list_first_entry(&hw->rx_queue, + struct ipw_rx_packet, queue); + + if (hw->shutting_down) + break; + list_del(&packet->queue); + + /* + * Note: ipwireless_network_packet_received must be called in a + * process context (i.e. via schedule_work) because the tty + * output code can sleep in the tty_flip_buffer_push call. + */ + if (packet->protocol == TL_PROTOCOLID_COM_DATA) { + if (hw->network != NULL) { + /* If the network hasn't been disconnected. */ + spin_unlock_irqrestore(&hw->lock, flags); + /* + * This must run unlocked due to tty processing + * and mutex locking + */ + ipwireless_network_packet_received( + hw->network, + packet->channel_idx, + (unsigned char *)packet + + sizeof(struct ipw_rx_packet), + packet->length); + spin_lock_irqsave(&hw->lock, flags); + } + /* Count queued DATA bytes only */ + hw->rx_bytes_queued -= packet->length; + } else { + /* + * This is safe to be called locked, callchain does + * not block + */ + handle_received_CTRL_packet(hw, packet->channel_idx, + (unsigned char *)packet + + sizeof(struct ipw_rx_packet), + packet->length); + } + pool_free(hw, packet); + /* + * Unblock reception of incoming packets if queue is no longer + * full. + */ + hw->blocking_rx = + hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE; + if (hw->shutting_down) + break; + } + spin_unlock_irqrestore(&hw->lock, flags); +} + +static void handle_received_CTRL_packet(struct ipw_hardware *hw, + unsigned int channel_idx, + const unsigned char *data, int len) +{ + const struct ipw_control_packet_body *body = + (const struct ipw_control_packet_body *) data; + unsigned int changed_mask; + + if (len != sizeof(struct ipw_control_packet_body)) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": control packet was %d bytes - wrong size!\n", + len); + return; + } + + switch (body->sig_no) { + case COMCTRL_CTS: + changed_mask = IPW_CONTROL_LINE_CTS; + break; + case COMCTRL_DCD: + changed_mask = IPW_CONTROL_LINE_DCD; + break; + case COMCTRL_DSR: + changed_mask = IPW_CONTROL_LINE_DSR; + break; + case COMCTRL_RI: + changed_mask = IPW_CONTROL_LINE_RI; + break; + default: + changed_mask = 0; + } + + if (changed_mask != 0) { + if (body->value) + hw->control_lines[channel_idx] |= changed_mask; + else + hw->control_lines[channel_idx] &= ~changed_mask; + if (hw->network) + ipwireless_network_notify_control_line_change( + hw->network, + channel_idx, + hw->control_lines[channel_idx], + changed_mask); + } +} + +static void handle_received_packet(struct ipw_hardware *hw, + const union nl_packet *packet, + unsigned short len) +{ + unsigned int protocol = packet->hdr.protocol; + unsigned int address = packet->hdr.address; + unsigned int header_length; + const unsigned char *data; + unsigned int data_len; + int is_last = packet->hdr.packet_rank & NL_LAST_PACKET; + + if (packet->hdr.packet_rank & NL_FIRST_PACKET) + header_length = NL_FIRST_PACKET_HEADER_SIZE; + else + header_length = NL_FOLLOWING_PACKET_HEADER_SIZE; + + data = packet->rawpkt + header_length; + data_len = len - header_length; + switch (protocol) { + case TL_PROTOCOLID_COM_DATA: + case TL_PROTOCOLID_COM_CTRL: + queue_received_packet(hw, protocol, address, data, data_len, + is_last); + break; + case TL_PROTOCOLID_SETUP: + handle_received_SETUP_packet(hw, address, data, data_len, + is_last); + break; + } +} + +static void acknowledge_data_read(struct ipw_hardware *hw) +{ + if (hw->hw_version == HW_VERSION_1) + outw(DCR_RXDONE, hw->base_port + IODCR); + else + writew(MEMRX_PCINTACKK, + &hw->memory_info_regs->memreg_pc_interrupt_ack); +} + +/* + * Retrieve a packet from the IPW hardware. + */ +static void do_receive_packet(struct ipw_hardware *hw) +{ + unsigned len; + unsigned i; + unsigned char pkt[LL_MTU_MAX]; + + start_timing(); + + if (hw->hw_version == HW_VERSION_1) { + len = inw(hw->base_port + IODRR); + if (len > hw->ll_mtu) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": received a packet of %u bytes - longer than the MTU!\n", len); + outw(DCR_RXDONE | DCR_RXRESET, hw->base_port + IODCR); + return; + } + + for (i = 0; i < len; i += 2) { + __le16 raw_data = inw(hw->base_port + IODRR); + unsigned short data = le16_to_cpu(raw_data); + + pkt[i] = (unsigned char) data; + pkt[i + 1] = (unsigned char) (data >> 8); + } + } else { + len = inw(hw->base_port); + if (len > hw->ll_mtu) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": received a packet of %u bytes - longer than the MTU!\n", len); + writew(MEMRX_PCINTACKK, + &hw->memory_info_regs->memreg_pc_interrupt_ack); + return; + } + + for (i = 0; i < len; i += 2) { + __le16 raw_data = inw(hw->base_port); + unsigned short data = le16_to_cpu(raw_data); + + pkt[i] = (unsigned char) data; + pkt[i + 1] = (unsigned char) (data >> 8); + } + + while ((i & 3) != 2) { + inw(hw->base_port); + i += 2; + } + } + + acknowledge_data_read(hw); + + swap_packet_bitfield_from_le(pkt); + + if (ipwireless_debug) + dump_data_bytes("recv", pkt, len); + + handle_received_packet(hw, (union nl_packet *) pkt, len); + + end_read_timing(len); +} + +static int get_current_packet_priority(struct ipw_hardware *hw) +{ + /* + * If we're initializing, don't send anything of higher priority than + * PRIO_SETUP. The network layer therefore need not care about + * hardware initialization - any of its stuff will simply be queued + * until setup is complete. + */ + return (hw->to_setup || hw->initializing + ? PRIO_SETUP + 1 : NL_NUM_OF_PRIORITIES); +} + +/* + * return 1 if something has been received from hw + */ +static int get_packets_from_hw(struct ipw_hardware *hw) +{ + int received = 0; + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + while (hw->rx_ready && !hw->blocking_rx) { + received = 1; + hw->rx_ready--; + spin_unlock_irqrestore(&hw->lock, flags); + + do_receive_packet(hw); + + spin_lock_irqsave(&hw->lock, flags); + } + spin_unlock_irqrestore(&hw->lock, flags); + + return received; +} + +/* + * Send pending packet up to given priority, prioritize SETUP data until + * hardware is fully setup. + * + * return 1 if more packets can be sent + */ +static int send_pending_packet(struct ipw_hardware *hw, int priority_limit) +{ + int more_to_send = 0; + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + if (hw->tx_queued && hw->tx_ready) { + int priority; + struct ipw_tx_packet *packet = NULL; + + /* Pick a packet */ + for (priority = 0; priority < priority_limit; priority++) { + if (!list_empty(&hw->tx_queue[priority])) { + packet = list_first_entry( + &hw->tx_queue[priority], + struct ipw_tx_packet, + queue); + + hw->tx_queued--; + list_del(&packet->queue); + + break; + } + } + if (!packet) { + hw->tx_queued = 0; + spin_unlock_irqrestore(&hw->lock, flags); + return 0; + } + + spin_unlock_irqrestore(&hw->lock, flags); + + /* Send */ + do_send_packet(hw, packet); + + /* Check if more to send */ + spin_lock_irqsave(&hw->lock, flags); + for (priority = 0; priority < priority_limit; priority++) + if (!list_empty(&hw->tx_queue[priority])) { + more_to_send = 1; + break; + } + + if (!more_to_send) + hw->tx_queued = 0; + } + spin_unlock_irqrestore(&hw->lock, flags); + + return more_to_send; +} + +/* + * Send and receive all queued packets. + */ +static void ipwireless_do_tasklet(unsigned long hw_) +{ + struct ipw_hardware *hw = (struct ipw_hardware *) hw_; + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + if (hw->shutting_down) { + spin_unlock_irqrestore(&hw->lock, flags); + return; + } + + if (hw->to_setup == 1) { + /* + * Initial setup data sent to hardware + */ + hw->to_setup = 2; + spin_unlock_irqrestore(&hw->lock, flags); + + ipw_setup_hardware(hw); + ipw_send_setup_packet(hw); + + send_pending_packet(hw, PRIO_SETUP + 1); + get_packets_from_hw(hw); + } else { + int priority_limit = get_current_packet_priority(hw); + int again; + + spin_unlock_irqrestore(&hw->lock, flags); + + do { + again = send_pending_packet(hw, priority_limit); + again |= get_packets_from_hw(hw); + } while (again); + } +} + +/* + * return true if the card is physically present. + */ +static int is_card_present(struct ipw_hardware *hw) +{ + if (hw->hw_version == HW_VERSION_1) + return inw(hw->base_port + IOIR) != 0xFFFF; + else + return readl(&hw->memory_info_regs->memreg_card_present) == + CARD_PRESENT_VALUE; +} + +static irqreturn_t ipwireless_handle_v1_interrupt(int irq, + struct ipw_hardware *hw) +{ + unsigned short irqn; + + irqn = inw(hw->base_port + IOIR); + + /* Check if card is present */ + if (irqn == 0xFFFF) + return IRQ_NONE; + else if (irqn != 0) { + unsigned short ack = 0; + unsigned long flags; + + /* Transmit complete. */ + if (irqn & IR_TXINTR) { + ack |= IR_TXINTR; + spin_lock_irqsave(&hw->lock, flags); + hw->tx_ready = 1; + spin_unlock_irqrestore(&hw->lock, flags); + } + /* Received data */ + if (irqn & IR_RXINTR) { + ack |= IR_RXINTR; + spin_lock_irqsave(&hw->lock, flags); + hw->rx_ready++; + spin_unlock_irqrestore(&hw->lock, flags); + } + if (ack != 0) { + outw(ack, hw->base_port + IOIR); + tasklet_schedule(&hw->tasklet); + } + return IRQ_HANDLED; + } + return IRQ_NONE; +} + +static void acknowledge_pcmcia_interrupt(struct ipw_hardware *hw) +{ + unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status); + + csr &= 0xfffd; + writew(csr, &hw->memregs_CCR->reg_config_and_status); +} + +static irqreturn_t ipwireless_handle_v2_v3_interrupt(int irq, + struct ipw_hardware *hw) +{ + int tx = 0; + int rx = 0; + int rx_repeat = 0; + int try_mem_tx_old; + unsigned long flags; + + do { + + unsigned short memtx = readw(hw->memreg_tx); + unsigned short memtx_serial; + unsigned short memrxdone = + readw(&hw->memory_info_regs->memreg_rx_done); + + try_mem_tx_old = 0; + + /* check whether the interrupt was generated by ipwireless card */ + if (!(memtx & MEMTX_TX) && !(memrxdone & MEMRX_RX_DONE)) { + + /* check if the card uses memreg_tx_old register */ + if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { + memtx = readw(&hw->memory_info_regs->memreg_tx_old); + if (memtx & MEMTX_TX) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": Using memreg_tx_old\n"); + hw->memreg_tx = + &hw->memory_info_regs->memreg_tx_old; + } else { + return IRQ_NONE; + } + } else + return IRQ_NONE; + } + + /* + * See if the card is physically present. Note that while it is + * powering up, it appears not to be present. + */ + if (!is_card_present(hw)) { + acknowledge_pcmcia_interrupt(hw); + return IRQ_HANDLED; + } + + memtx_serial = memtx & (unsigned short) 0xff00; + if (memtx & MEMTX_TX) { + writew(memtx_serial, hw->memreg_tx); + + if (hw->serial_number_detected) { + if (memtx_serial != hw->last_memtx_serial) { + hw->last_memtx_serial = memtx_serial; + spin_lock_irqsave(&hw->lock, flags); + hw->rx_ready++; + spin_unlock_irqrestore(&hw->lock, flags); + rx = 1; + } else + /* Ignore 'Timer Recovery' duplicates. */ + rx_repeat = 1; + } else { + /* + * If a non-zero serial number is seen, then enable + * serial number checking. + */ + if (memtx_serial != 0) { + hw->serial_number_detected = 1; + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME + ": memreg_tx serial num detected\n"); + + spin_lock_irqsave(&hw->lock, flags); + hw->rx_ready++; + spin_unlock_irqrestore(&hw->lock, flags); + } + rx = 1; + } + } + if (memrxdone & MEMRX_RX_DONE) { + writew(0, &hw->memory_info_regs->memreg_rx_done); + spin_lock_irqsave(&hw->lock, flags); + hw->tx_ready = 1; + spin_unlock_irqrestore(&hw->lock, flags); + tx = 1; + } + if (tx) + writew(MEMRX_PCINTACKK, + &hw->memory_info_regs->memreg_pc_interrupt_ack); + + acknowledge_pcmcia_interrupt(hw); + + if (tx || rx) + tasklet_schedule(&hw->tasklet); + else if (!rx_repeat) { + if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { + if (hw->serial_number_detected) + printk(KERN_WARNING IPWIRELESS_PCCARD_NAME + ": spurious interrupt - new_tx mode\n"); + else { + printk(KERN_WARNING IPWIRELESS_PCCARD_NAME + ": no valid memreg_tx value - switching to the old memreg_tx\n"); + hw->memreg_tx = + &hw->memory_info_regs->memreg_tx_old; + try_mem_tx_old = 1; + } + } else + printk(KERN_WARNING IPWIRELESS_PCCARD_NAME + ": spurious interrupt - old_tx mode\n"); + } + + } while (try_mem_tx_old == 1); + + return IRQ_HANDLED; +} + +irqreturn_t ipwireless_interrupt(int irq, void *dev_id) +{ + struct ipw_dev *ipw = dev_id; + + if (ipw->hardware->hw_version == HW_VERSION_1) + return ipwireless_handle_v1_interrupt(irq, ipw->hardware); + else + return ipwireless_handle_v2_v3_interrupt(irq, ipw->hardware); +} + +static void flush_packets_to_hw(struct ipw_hardware *hw) +{ + int priority_limit; + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + priority_limit = get_current_packet_priority(hw); + spin_unlock_irqrestore(&hw->lock, flags); + + while (send_pending_packet(hw, priority_limit)); +} + +static void send_packet(struct ipw_hardware *hw, int priority, + struct ipw_tx_packet *packet) +{ + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + list_add_tail(&packet->queue, &hw->tx_queue[priority]); + hw->tx_queued++; + spin_unlock_irqrestore(&hw->lock, flags); + + flush_packets_to_hw(hw); +} + +/* Create data packet, non-atomic allocation */ +static void *alloc_data_packet(int data_size, + unsigned char dest_addr, + unsigned char protocol) +{ + struct ipw_tx_packet *packet = kzalloc( + sizeof(struct ipw_tx_packet) + data_size, + GFP_ATOMIC); + + if (!packet) + return NULL; + + INIT_LIST_HEAD(&packet->queue); + packet->dest_addr = dest_addr; + packet->protocol = protocol; + packet->length = data_size; + + return packet; +} + +static void *alloc_ctrl_packet(int header_size, + unsigned char dest_addr, + unsigned char protocol, + unsigned char sig_no) +{ + /* + * sig_no is located right after ipw_tx_packet struct in every + * CTRL or SETUP packets, we can use ipw_control_packet as a + * common struct + */ + struct ipw_control_packet *packet = kzalloc(header_size, GFP_ATOMIC); + + if (!packet) + return NULL; + + INIT_LIST_HEAD(&packet->header.queue); + packet->header.dest_addr = dest_addr; + packet->header.protocol = protocol; + packet->header.length = header_size - sizeof(struct ipw_tx_packet); + packet->body.sig_no = sig_no; + + return packet; +} + +int ipwireless_send_packet(struct ipw_hardware *hw, unsigned int channel_idx, + const unsigned char *data, unsigned int length, + void (*callback) (void *cb, unsigned int length), + void *callback_data) +{ + struct ipw_tx_packet *packet; + + packet = alloc_data_packet(length, (channel_idx + 1), + TL_PROTOCOLID_COM_DATA); + if (!packet) + return -ENOMEM; + packet->packet_callback = callback; + packet->callback_data = callback_data; + memcpy((unsigned char *) packet + sizeof(struct ipw_tx_packet), data, + length); + + send_packet(hw, PRIO_DATA, packet); + return 0; +} + +static int set_control_line(struct ipw_hardware *hw, int prio, + unsigned int channel_idx, int line, int state) +{ + struct ipw_control_packet *packet; + int protocolid = TL_PROTOCOLID_COM_CTRL; + + if (prio == PRIO_SETUP) + protocolid = TL_PROTOCOLID_SETUP; + + packet = alloc_ctrl_packet(sizeof(struct ipw_control_packet), + (channel_idx + 1), protocolid, line); + if (!packet) + return -ENOMEM; + packet->header.length = sizeof(struct ipw_control_packet_body); + packet->body.value = (state == 0 ? 0 : 1); + send_packet(hw, prio, &packet->header); + return 0; +} + + +static int set_DTR(struct ipw_hardware *hw, int priority, + unsigned int channel_idx, int state) +{ + if (state != 0) + hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_DTR; + else + hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_DTR; + + return set_control_line(hw, priority, channel_idx, COMCTRL_DTR, state); +} + +static int set_RTS(struct ipw_hardware *hw, int priority, + unsigned int channel_idx, int state) +{ + if (state != 0) + hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_RTS; + else + hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_RTS; + + return set_control_line(hw, priority, channel_idx, COMCTRL_RTS, state); +} + +int ipwireless_set_DTR(struct ipw_hardware *hw, unsigned int channel_idx, + int state) +{ + return set_DTR(hw, PRIO_CTRL, channel_idx, state); +} + +int ipwireless_set_RTS(struct ipw_hardware *hw, unsigned int channel_idx, + int state) +{ + return set_RTS(hw, PRIO_CTRL, channel_idx, state); +} + +struct ipw_setup_get_version_query_packet { + struct ipw_tx_packet header; + struct tl_setup_get_version_qry body; +}; + +struct ipw_setup_config_packet { + struct ipw_tx_packet header; + struct tl_setup_config_msg body; +}; + +struct ipw_setup_config_done_packet { + struct ipw_tx_packet header; + struct tl_setup_config_done_msg body; +}; + +struct ipw_setup_open_packet { + struct ipw_tx_packet header; + struct tl_setup_open_msg body; +}; + +struct ipw_setup_info_packet { + struct ipw_tx_packet header; + struct tl_setup_info_msg body; +}; + +struct ipw_setup_reboot_msg_ack { + struct ipw_tx_packet header; + struct TlSetupRebootMsgAck body; +}; + +/* This handles the actual initialization of the card */ +static void __handle_setup_get_version_rsp(struct ipw_hardware *hw) +{ + struct ipw_setup_config_packet *config_packet; + struct ipw_setup_config_done_packet *config_done_packet; + struct ipw_setup_open_packet *open_packet; + struct ipw_setup_info_packet *info_packet; + int port; + unsigned int channel_idx; + + /* generate config packet */ + for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) { + config_packet = alloc_ctrl_packet( + sizeof(struct ipw_setup_config_packet), + ADDR_SETUP_PROT, + TL_PROTOCOLID_SETUP, + TL_SETUP_SIGNO_CONFIG_MSG); + if (!config_packet) + goto exit_nomem; + config_packet->header.length = sizeof(struct tl_setup_config_msg); + config_packet->body.port_no = port; + config_packet->body.prio_data = PRIO_DATA; + config_packet->body.prio_ctrl = PRIO_CTRL; + send_packet(hw, PRIO_SETUP, &config_packet->header); + } + config_done_packet = alloc_ctrl_packet( + sizeof(struct ipw_setup_config_done_packet), + ADDR_SETUP_PROT, + TL_PROTOCOLID_SETUP, + TL_SETUP_SIGNO_CONFIG_DONE_MSG); + if (!config_done_packet) + goto exit_nomem; + config_done_packet->header.length = sizeof(struct tl_setup_config_done_msg); + send_packet(hw, PRIO_SETUP, &config_done_packet->header); + + /* generate open packet */ + for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) { + open_packet = alloc_ctrl_packet( + sizeof(struct ipw_setup_open_packet), + ADDR_SETUP_PROT, + TL_PROTOCOLID_SETUP, + TL_SETUP_SIGNO_OPEN_MSG); + if (!open_packet) + goto exit_nomem; + open_packet->header.length = sizeof(struct tl_setup_open_msg); + open_packet->body.port_no = port; + send_packet(hw, PRIO_SETUP, &open_packet->header); + } + for (channel_idx = 0; + channel_idx < NL_NUM_OF_ADDRESSES; channel_idx++) { + int ret; + + ret = set_DTR(hw, PRIO_SETUP, channel_idx, + (hw->control_lines[channel_idx] & + IPW_CONTROL_LINE_DTR) != 0); + if (ret) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": error setting DTR (%d)\n", ret); + return; + } + + ret = set_RTS(hw, PRIO_SETUP, channel_idx, + (hw->control_lines [channel_idx] & + IPW_CONTROL_LINE_RTS) != 0); + if (ret) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": error setting RTS (%d)\n", ret); + return; + } + } + /* + * For NDIS we assume that we are using sync PPP frames, for COM async. + * This driver uses NDIS mode too. We don't bother with translation + * from async -> sync PPP. + */ + info_packet = alloc_ctrl_packet(sizeof(struct ipw_setup_info_packet), + ADDR_SETUP_PROT, + TL_PROTOCOLID_SETUP, + TL_SETUP_SIGNO_INFO_MSG); + if (!info_packet) + goto exit_nomem; + info_packet->header.length = sizeof(struct tl_setup_info_msg); + info_packet->body.driver_type = NDISWAN_DRIVER; + info_packet->body.major_version = NDISWAN_DRIVER_MAJOR_VERSION; + info_packet->body.minor_version = NDISWAN_DRIVER_MINOR_VERSION; + send_packet(hw, PRIO_SETUP, &info_packet->header); + + /* Initialization is now complete, so we clear the 'to_setup' flag */ + hw->to_setup = 0; + + return; + +exit_nomem: + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": not enough memory to alloc control packet\n"); + hw->to_setup = -1; +} + +static void handle_setup_get_version_rsp(struct ipw_hardware *hw, + unsigned char vers_no) +{ + del_timer(&hw->setup_timer); + hw->initializing = 0; + printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": card is ready.\n"); + + if (vers_no == TL_SETUP_VERSION) + __handle_setup_get_version_rsp(hw); + else + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": invalid hardware version no %u\n", + (unsigned int) vers_no); +} + +static void ipw_send_setup_packet(struct ipw_hardware *hw) +{ + struct ipw_setup_get_version_query_packet *ver_packet; + + ver_packet = alloc_ctrl_packet( + sizeof(struct ipw_setup_get_version_query_packet), + ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP, + TL_SETUP_SIGNO_GET_VERSION_QRY); + if (!ver_packet) + return; + ver_packet->header.length = sizeof(struct tl_setup_get_version_qry); + + /* + * Response is handled in handle_received_SETUP_packet + */ + send_packet(hw, PRIO_SETUP, &ver_packet->header); +} + +static void handle_received_SETUP_packet(struct ipw_hardware *hw, + unsigned int address, + const unsigned char *data, int len, + int is_last) +{ + const union ipw_setup_rx_msg *rx_msg = (const union ipw_setup_rx_msg *) data; + + if (address != ADDR_SETUP_PROT) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": setup packet has bad address %d\n", address); + return; + } + + switch (rx_msg->sig_no) { + case TL_SETUP_SIGNO_GET_VERSION_RSP: + if (hw->to_setup) + handle_setup_get_version_rsp(hw, + rx_msg->version_rsp_msg.version); + break; + + case TL_SETUP_SIGNO_OPEN_MSG: + if (ipwireless_debug) { + unsigned int channel_idx = rx_msg->open_msg.port_no - 1; + + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": OPEN_MSG [channel %u] reply received\n", + channel_idx); + } + break; + + case TL_SETUP_SIGNO_INFO_MSG_ACK: + if (ipwireless_debug) + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME + ": card successfully configured as NDISWAN\n"); + break; + + case TL_SETUP_SIGNO_REBOOT_MSG: + if (hw->to_setup) + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME + ": Setup not completed - ignoring reboot msg\n"); + else { + struct ipw_setup_reboot_msg_ack *packet; + + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME + ": Acknowledging REBOOT message\n"); + packet = alloc_ctrl_packet( + sizeof(struct ipw_setup_reboot_msg_ack), + ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP, + TL_SETUP_SIGNO_REBOOT_MSG_ACK); + if (!packet) { + pr_err(IPWIRELESS_PCCARD_NAME + ": Not enough memory to send reboot packet"); + break; + } + packet->header.length = + sizeof(struct TlSetupRebootMsgAck); + send_packet(hw, PRIO_SETUP, &packet->header); + if (hw->reboot_callback) + hw->reboot_callback(hw->reboot_callback_data); + } + break; + + default: + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": unknown setup message %u received\n", + (unsigned int) rx_msg->sig_no); + } +} + +static void do_close_hardware(struct ipw_hardware *hw) +{ + unsigned int irqn; + + if (hw->hw_version == HW_VERSION_1) { + /* Disable TX and RX interrupts. */ + outw(0, hw->base_port + IOIER); + + /* Acknowledge any outstanding interrupt requests */ + irqn = inw(hw->base_port + IOIR); + if (irqn & IR_TXINTR) + outw(IR_TXINTR, hw->base_port + IOIR); + if (irqn & IR_RXINTR) + outw(IR_RXINTR, hw->base_port + IOIR); + + synchronize_irq(hw->irq); + } +} + +struct ipw_hardware *ipwireless_hardware_create(void) +{ + int i; + struct ipw_hardware *hw = + kzalloc(sizeof(struct ipw_hardware), GFP_KERNEL); + + if (!hw) + return NULL; + + hw->irq = -1; + hw->initializing = 1; + hw->tx_ready = 1; + hw->rx_bytes_queued = 0; + hw->rx_pool_size = 0; + hw->last_memtx_serial = (unsigned short) 0xffff; + for (i = 0; i < NL_NUM_OF_PRIORITIES; i++) + INIT_LIST_HEAD(&hw->tx_queue[i]); + + INIT_LIST_HEAD(&hw->rx_queue); + INIT_LIST_HEAD(&hw->rx_pool); + spin_lock_init(&hw->lock); + tasklet_init(&hw->tasklet, ipwireless_do_tasklet, (unsigned long) hw); + INIT_WORK(&hw->work_rx, ipw_receive_data_work); + timer_setup(&hw->setup_timer, ipwireless_setup_timer, 0); + + return hw; +} + +void ipwireless_init_hardware_v1(struct ipw_hardware *hw, + unsigned int base_port, + void __iomem *attr_memory, + void __iomem *common_memory, + int is_v2_card, + void (*reboot_callback) (void *data), + void *reboot_callback_data) +{ + if (hw->removed) { + hw->removed = 0; + enable_irq(hw->irq); + } + hw->base_port = base_port; + hw->hw_version = (is_v2_card ? HW_VERSION_2 : HW_VERSION_1); + hw->ll_mtu = (hw->hw_version == HW_VERSION_1 ? LL_MTU_V1 : LL_MTU_V2); + hw->memregs_CCR = (struct MEMCCR __iomem *) + ((unsigned short __iomem *) attr_memory + 0x200); + hw->memory_info_regs = (struct MEMINFREG __iomem *) common_memory; + hw->memreg_tx = &hw->memory_info_regs->memreg_tx_new; + hw->reboot_callback = reboot_callback; + hw->reboot_callback_data = reboot_callback_data; +} + +void ipwireless_init_hardware_v2_v3(struct ipw_hardware *hw) +{ + hw->initializing = 1; + hw->init_loops = 0; + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": waiting for card to start up...\n"); + ipwireless_setup_timer(&hw->setup_timer); +} + +static void ipwireless_setup_timer(struct timer_list *t) +{ + struct ipw_hardware *hw = from_timer(hw, t, setup_timer); + + hw->init_loops++; + + if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY && + hw->hw_version == HW_VERSION_2 && + hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": failed to startup using TX2, trying TX\n"); + + hw->memreg_tx = &hw->memory_info_regs->memreg_tx_old; + hw->init_loops = 0; + } + /* Give up after a certain number of retries */ + if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY) { + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": card failed to start up!\n"); + hw->initializing = 0; + } else { + /* Do not attempt to write to the board if it is not present. */ + if (is_card_present(hw)) { + unsigned long flags; + + spin_lock_irqsave(&hw->lock, flags); + hw->to_setup = 1; + hw->tx_ready = 1; + spin_unlock_irqrestore(&hw->lock, flags); + tasklet_schedule(&hw->tasklet); + } + + mod_timer(&hw->setup_timer, + jiffies + msecs_to_jiffies(TL_SETUP_VERSION_QRY_TMO)); + } +} + +/* + * Stop any interrupts from executing so that, once this function returns, + * other layers of the driver can be sure they won't get any more callbacks. + * Thus must be called on a proper process context. + */ +void ipwireless_stop_interrupts(struct ipw_hardware *hw) +{ + if (!hw->shutting_down) { + /* Tell everyone we are going down. */ + hw->shutting_down = 1; + del_timer(&hw->setup_timer); + + /* Prevent the hardware from sending any more interrupts */ + do_close_hardware(hw); + } +} + +void ipwireless_hardware_free(struct ipw_hardware *hw) +{ + int i; + struct ipw_rx_packet *rp, *rq; + struct ipw_tx_packet *tp, *tq; + + ipwireless_stop_interrupts(hw); + + flush_work(&hw->work_rx); + + for (i = 0; i < NL_NUM_OF_ADDRESSES; i++) + kfree(hw->packet_assembler[i]); + + for (i = 0; i < NL_NUM_OF_PRIORITIES; i++) + list_for_each_entry_safe(tp, tq, &hw->tx_queue[i], queue) { + list_del(&tp->queue); + kfree(tp); + } + + list_for_each_entry_safe(rp, rq, &hw->rx_queue, queue) { + list_del(&rp->queue); + kfree(rp); + } + + list_for_each_entry_safe(rp, rq, &hw->rx_pool, queue) { + list_del(&rp->queue); + kfree(rp); + } + kfree(hw); +} + +/* + * Associate the specified network with this hardware, so it will receive events + * from it. + */ +void ipwireless_associate_network(struct ipw_hardware *hw, + struct ipw_network *network) +{ + hw->network = network; +} diff --git a/drivers/tty/ipwireless/hardware.h b/drivers/tty/ipwireless/hardware.h new file mode 100644 index 000000000..e524a8fcc --- /dev/null +++ b/drivers/tty/ipwireless/hardware.h @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#ifndef _IPWIRELESS_CS_HARDWARE_H_ +#define _IPWIRELESS_CS_HARDWARE_H_ + +#include <linux/types.h> +#include <linux/sched.h> +#include <linux/interrupt.h> + +#define IPW_CONTROL_LINE_CTS 0x0001 +#define IPW_CONTROL_LINE_DCD 0x0002 +#define IPW_CONTROL_LINE_DSR 0x0004 +#define IPW_CONTROL_LINE_RI 0x0008 +#define IPW_CONTROL_LINE_DTR 0x0010 +#define IPW_CONTROL_LINE_RTS 0x0020 + +struct ipw_hardware; +struct ipw_network; + +struct ipw_hardware *ipwireless_hardware_create(void); +void ipwireless_hardware_free(struct ipw_hardware *hw); +irqreturn_t ipwireless_interrupt(int irq, void *dev_id); +int ipwireless_set_DTR(struct ipw_hardware *hw, unsigned int channel_idx, + int state); +int ipwireless_set_RTS(struct ipw_hardware *hw, unsigned int channel_idx, + int state); +int ipwireless_send_packet(struct ipw_hardware *hw, + unsigned int channel_idx, + const unsigned char *data, + unsigned int length, + void (*packet_sent_callback) (void *cb, + unsigned int length), + void *sent_cb_data); +void ipwireless_associate_network(struct ipw_hardware *hw, + struct ipw_network *net); +void ipwireless_stop_interrupts(struct ipw_hardware *hw); +void ipwireless_init_hardware_v1(struct ipw_hardware *hw, + unsigned int base_port, + void __iomem *attr_memory, + void __iomem *common_memory, + int is_v2_card, + void (*reboot_cb) (void *data), + void *reboot_cb_data); +void ipwireless_init_hardware_v2_v3(struct ipw_hardware *hw); +void ipwireless_sleep(unsigned int tenths); + +#endif diff --git a/drivers/tty/ipwireless/main.c b/drivers/tty/ipwireless/main.c new file mode 100644 index 000000000..4c18bbfe1 --- /dev/null +++ b/drivers/tty/ipwireless/main.c @@ -0,0 +1,356 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#include "hardware.h" +#include "network.h" +#include "main.h" +#include "tty.h" + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/slab.h> + +#include <pcmcia/cisreg.h> +#include <pcmcia/device_id.h> +#include <pcmcia/ss.h> +#include <pcmcia/ds.h> + +static const struct pcmcia_device_id ipw_ids[] = { + PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0100), + PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0200), + PCMCIA_DEVICE_NULL +}; +MODULE_DEVICE_TABLE(pcmcia, ipw_ids); + +static void ipwireless_detach(struct pcmcia_device *link); + +/* + * Module params + */ +/* Debug mode: more verbose, print sent/recv bytes */ +int ipwireless_debug; +int ipwireless_loopback; +int ipwireless_out_queue = 10; + +module_param_named(debug, ipwireless_debug, int, 0); +module_param_named(loopback, ipwireless_loopback, int, 0); +module_param_named(out_queue, ipwireless_out_queue, int, 0); +MODULE_PARM_DESC(debug, "switch on debug messages [0]"); +MODULE_PARM_DESC(loopback, + "debug: enable ras_raw channel [0]"); +MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]"); + +/* Executes in process context. */ +static void signalled_reboot_work(struct work_struct *work_reboot) +{ + struct ipw_dev *ipw = container_of(work_reboot, struct ipw_dev, + work_reboot); + struct pcmcia_device *link = ipw->link; + pcmcia_reset_card(link->socket); +} + +static void signalled_reboot_callback(void *callback_data) +{ + struct ipw_dev *ipw = (struct ipw_dev *) callback_data; + + /* Delegate to process context. */ + schedule_work(&ipw->work_reboot); +} + +static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data) +{ + struct ipw_dev *ipw = priv_data; + int ret; + + p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; + p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO; + + /* 0x40 causes it to generate level mode interrupts. */ + /* 0x04 enables IREQ pin. */ + p_dev->config_index |= 0x44; + p_dev->io_lines = 16; + ret = pcmcia_request_io(p_dev); + if (ret) + return ret; + + if (!request_region(p_dev->resource[0]->start, + resource_size(p_dev->resource[0]), + IPWIRELESS_PCCARD_NAME)) { + ret = -EBUSY; + goto exit; + } + + p_dev->resource[2]->flags |= + WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE; + + ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0); + if (ret != 0) + goto exit1; + + ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr); + if (ret != 0) + goto exit1; + + ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100; + + ipw->common_memory = ioremap(p_dev->resource[2]->start, + resource_size(p_dev->resource[2])); + if (!ipw->common_memory) { + ret = -ENOMEM; + goto exit1; + } + if (!request_mem_region(p_dev->resource[2]->start, + resource_size(p_dev->resource[2]), + IPWIRELESS_PCCARD_NAME)) { + ret = -EBUSY; + goto exit2; + } + + p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM | + WIN_ENABLE; + p_dev->resource[3]->end = 0; /* this used to be 0x1000 */ + ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0); + if (ret != 0) + goto exit3; + + ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0); + if (ret != 0) + goto exit3; + + ipw->attr_memory = ioremap(p_dev->resource[3]->start, + resource_size(p_dev->resource[3])); + if (!ipw->attr_memory) { + ret = -ENOMEM; + goto exit3; + } + if (!request_mem_region(p_dev->resource[3]->start, + resource_size(p_dev->resource[3]), + IPWIRELESS_PCCARD_NAME)) { + ret = -EBUSY; + goto exit4; + } + + return 0; + +exit4: + iounmap(ipw->attr_memory); +exit3: + release_mem_region(p_dev->resource[2]->start, + resource_size(p_dev->resource[2])); +exit2: + iounmap(ipw->common_memory); +exit1: + release_region(p_dev->resource[0]->start, + resource_size(p_dev->resource[0])); +exit: + pcmcia_disable_device(p_dev); + return ret; +} + +static int config_ipwireless(struct ipw_dev *ipw) +{ + struct pcmcia_device *link = ipw->link; + int ret = 0; + + ipw->is_v2_card = 0; + link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM | + CONF_ENABLE_IRQ; + + ret = pcmcia_loop_config(link, ipwireless_probe, ipw); + if (ret != 0) + return ret; + + INIT_WORK(&ipw->work_reboot, signalled_reboot_work); + + ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start, + ipw->attr_memory, ipw->common_memory, + ipw->is_v2_card, signalled_reboot_callback, + ipw); + + ret = pcmcia_request_irq(link, ipwireless_interrupt); + if (ret != 0) + goto exit; + + printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n", + ipw->is_v2_card ? "V2/V3" : "V1"); + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": I/O ports %pR, irq %d\n", link->resource[0], + (unsigned int) link->irq); + if (ipw->attr_memory && ipw->common_memory) + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": attr memory %pR, common memory %pR\n", + link->resource[3], + link->resource[2]); + + ipw->network = ipwireless_network_create(ipw->hardware); + if (!ipw->network) + goto exit; + + ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network); + if (!ipw->tty) + goto exit; + + ipwireless_init_hardware_v2_v3(ipw->hardware); + + /* + * Do the RequestConfiguration last, because it enables interrupts. + * Then we don't get any interrupts before we're ready for them. + */ + ret = pcmcia_enable_device(link); + if (ret != 0) + goto exit; + + return 0; + +exit: + if (ipw->common_memory) { + release_mem_region(link->resource[2]->start, + resource_size(link->resource[2])); + iounmap(ipw->common_memory); + } + if (ipw->attr_memory) { + release_mem_region(link->resource[3]->start, + resource_size(link->resource[3])); + iounmap(ipw->attr_memory); + } + pcmcia_disable_device(link); + return -1; +} + +static void release_ipwireless(struct ipw_dev *ipw) +{ + release_region(ipw->link->resource[0]->start, + resource_size(ipw->link->resource[0])); + if (ipw->common_memory) { + release_mem_region(ipw->link->resource[2]->start, + resource_size(ipw->link->resource[2])); + iounmap(ipw->common_memory); + } + if (ipw->attr_memory) { + release_mem_region(ipw->link->resource[3]->start, + resource_size(ipw->link->resource[3])); + iounmap(ipw->attr_memory); + } + pcmcia_disable_device(ipw->link); +} + +/* + * ipwireless_attach() creates an "instance" of the driver, allocating + * local data structures for one device (one interface). The device + * is registered with Card Services. + * + * The pcmcia_device structure is initialized, but we don't actually + * configure the card at this point -- we wait until we receive a + * card insertion event. + */ +static int ipwireless_attach(struct pcmcia_device *link) +{ + struct ipw_dev *ipw; + int ret; + + ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL); + if (!ipw) + return -ENOMEM; + + ipw->link = link; + link->priv = ipw; + + ipw->hardware = ipwireless_hardware_create(); + if (!ipw->hardware) { + kfree(ipw); + return -ENOMEM; + } + /* RegisterClient will call config_ipwireless */ + + ret = config_ipwireless(ipw); + + if (ret != 0) { + ipwireless_detach(link); + return ret; + } + + return 0; +} + +/* + * This deletes a driver "instance". The device is de-registered with + * Card Services. If it has been released, all local data structures + * are freed. Otherwise, the structures will be freed when the device + * is released. + */ +static void ipwireless_detach(struct pcmcia_device *link) +{ + struct ipw_dev *ipw = link->priv; + + release_ipwireless(ipw); + + if (ipw->tty != NULL) + ipwireless_tty_free(ipw->tty); + if (ipw->network != NULL) + ipwireless_network_free(ipw->network); + if (ipw->hardware != NULL) + ipwireless_hardware_free(ipw->hardware); + kfree(ipw); +} + +static struct pcmcia_driver me = { + .owner = THIS_MODULE, + .probe = ipwireless_attach, + .remove = ipwireless_detach, + .name = IPWIRELESS_PCCARD_NAME, + .id_table = ipw_ids +}; + +/* + * Module insertion : initialisation of the module. + * Register the card with cardmgr... + */ +static int __init init_ipwireless(void) +{ + int ret; + + ret = ipwireless_tty_init(); + if (ret != 0) + return ret; + + ret = pcmcia_register_driver(&me); + if (ret != 0) + ipwireless_tty_release(); + + return ret; +} + +/* + * Module removal + */ +static void __exit exit_ipwireless(void) +{ + pcmcia_unregister_driver(&me); + ipwireless_tty_release(); +} + +module_init(init_ipwireless); +module_exit(exit_ipwireless); + +MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR); +MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION); +MODULE_LICENSE("GPL"); diff --git a/drivers/tty/ipwireless/main.h b/drivers/tty/ipwireless/main.h new file mode 100644 index 000000000..73818bb64 --- /dev/null +++ b/drivers/tty/ipwireless/main.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#ifndef _IPWIRELESS_CS_H_ +#define _IPWIRELESS_CS_H_ + +#include <linux/sched.h> +#include <linux/types.h> + +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> + +#include "hardware.h" + +#define IPWIRELESS_PCCARD_NAME "ipwireless" +#define IPWIRELESS_PCMCIA_VERSION "1.1" +#define IPWIRELESS_PCMCIA_AUTHOR \ + "Stephen Blackheath, Ben Martel, Jiri Kosina and David Sterba" + +#define IPWIRELESS_TX_QUEUE_SIZE 262144 +#define IPWIRELESS_RX_QUEUE_SIZE 262144 + +#define IPWIRELESS_STATE_DEBUG + +struct ipw_hardware; +struct ipw_network; +struct ipw_tty; + +struct ipw_dev { + struct pcmcia_device *link; + int is_v2_card; + + void __iomem *attr_memory; + + void __iomem *common_memory; + + /* Reference to attribute memory, containing CIS data */ + void *attribute_memory; + + /* Hardware context */ + struct ipw_hardware *hardware; + /* Network layer context */ + struct ipw_network *network; + /* TTY device context */ + struct ipw_tty *tty; + struct work_struct work_reboot; +}; + +/* Module parametres */ +extern int ipwireless_debug; +extern int ipwireless_loopback; +extern int ipwireless_out_queue; + +#endif diff --git a/drivers/tty/ipwireless/network.c b/drivers/tty/ipwireless/network.c new file mode 100644 index 000000000..fe569f629 --- /dev/null +++ b/drivers/tty/ipwireless/network.c @@ -0,0 +1,517 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mutex.h> +#include <linux/netdevice.h> +#include <linux/ppp_channel.h> +#include <linux/ppp_defs.h> +#include <linux/slab.h> +#include <linux/ppp-ioctl.h> +#include <linux/skbuff.h> + +#include "network.h" +#include "hardware.h" +#include "main.h" +#include "tty.h" + +#define MAX_ASSOCIATED_TTYS 2 + +#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP) + +struct ipw_network { + /* Hardware context, used for calls to hardware layer. */ + struct ipw_hardware *hardware; + /* Context for kernel 'generic_ppp' functionality */ + struct ppp_channel *ppp_channel; + /* tty context connected with IPW console */ + struct ipw_tty *associated_ttys[NO_OF_IPW_CHANNELS][MAX_ASSOCIATED_TTYS]; + /* True if ppp needs waking up once we're ready to xmit */ + int ppp_blocked; + /* Number of packets queued up in hardware module. */ + int outgoing_packets_queued; + /* Spinlock to avoid interrupts during shutdown */ + spinlock_t lock; + struct mutex close_lock; + + /* PPP ioctl data, not actually used anywere */ + unsigned int flags; + unsigned int rbits; + u32 xaccm[8]; + u32 raccm; + int mru; + + int shutting_down; + unsigned int ras_control_lines; + + struct work_struct work_go_online; + struct work_struct work_go_offline; +}; + +static void notify_packet_sent(void *callback_data, unsigned int packet_length) +{ + struct ipw_network *network = callback_data; + unsigned long flags; + + spin_lock_irqsave(&network->lock, flags); + network->outgoing_packets_queued--; + if (network->ppp_channel != NULL) { + if (network->ppp_blocked) { + network->ppp_blocked = 0; + spin_unlock_irqrestore(&network->lock, flags); + ppp_output_wakeup(network->ppp_channel); + if (ipwireless_debug) + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME + ": ppp unblocked\n"); + } else + spin_unlock_irqrestore(&network->lock, flags); + } else + spin_unlock_irqrestore(&network->lock, flags); +} + +/* + * Called by the ppp system when it has a packet to send to the hardware. + */ +static int ipwireless_ppp_start_xmit(struct ppp_channel *ppp_channel, + struct sk_buff *skb) +{ + struct ipw_network *network = ppp_channel->private; + unsigned long flags; + + spin_lock_irqsave(&network->lock, flags); + if (network->outgoing_packets_queued < ipwireless_out_queue) { + unsigned char *buf; + static unsigned char header[] = { + PPP_ALLSTATIONS, /* 0xff */ + PPP_UI, /* 0x03 */ + }; + int ret; + + network->outgoing_packets_queued++; + spin_unlock_irqrestore(&network->lock, flags); + + /* + * If we have the requested amount of headroom in the skb we + * were handed, then we can add the header efficiently. + */ + if (skb_headroom(skb) >= 2) { + memcpy(skb_push(skb, 2), header, 2); + ret = ipwireless_send_packet(network->hardware, + IPW_CHANNEL_RAS, skb->data, + skb->len, + notify_packet_sent, + network); + if (ret < 0) { + skb_pull(skb, 2); + return 0; + } + } else { + /* Otherwise (rarely) we do it inefficiently. */ + buf = kmalloc(skb->len + 2, GFP_ATOMIC); + if (!buf) + return 0; + memcpy(buf + 2, skb->data, skb->len); + memcpy(buf, header, 2); + ret = ipwireless_send_packet(network->hardware, + IPW_CHANNEL_RAS, buf, + skb->len + 2, + notify_packet_sent, + network); + kfree(buf); + if (ret < 0) + return 0; + } + kfree_skb(skb); + return 1; + } else { + /* + * Otherwise reject the packet, and flag that the ppp system + * needs to be unblocked once we are ready to send. + */ + network->ppp_blocked = 1; + spin_unlock_irqrestore(&network->lock, flags); + if (ipwireless_debug) + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": ppp blocked\n"); + return 0; + } +} + +/* Handle an ioctl call that has come in via ppp. (copy of ppp_async_ioctl() */ +static int ipwireless_ppp_ioctl(struct ppp_channel *ppp_channel, + unsigned int cmd, unsigned long arg) +{ + struct ipw_network *network = ppp_channel->private; + int err, val; + u32 accm[8]; + int __user *user_arg = (int __user *) arg; + + err = -EFAULT; + switch (cmd) { + case PPPIOCGFLAGS: + val = network->flags | network->rbits; + if (put_user(val, user_arg)) + break; + err = 0; + break; + + case PPPIOCSFLAGS: + if (get_user(val, user_arg)) + break; + network->flags = val & ~SC_RCV_BITS; + network->rbits = val & SC_RCV_BITS; + err = 0; + break; + + case PPPIOCGASYNCMAP: + if (put_user(network->xaccm[0], user_arg)) + break; + err = 0; + break; + + case PPPIOCSASYNCMAP: + if (get_user(network->xaccm[0], user_arg)) + break; + err = 0; + break; + + case PPPIOCGRASYNCMAP: + if (put_user(network->raccm, user_arg)) + break; + err = 0; + break; + + case PPPIOCSRASYNCMAP: + if (get_user(network->raccm, user_arg)) + break; + err = 0; + break; + + case PPPIOCGXASYNCMAP: + if (copy_to_user((void __user *) arg, network->xaccm, + sizeof(network->xaccm))) + break; + err = 0; + break; + + case PPPIOCSXASYNCMAP: + if (copy_from_user(accm, (void __user *) arg, sizeof(accm))) + break; + accm[2] &= ~0x40000000U; /* can't escape 0x5e */ + accm[3] |= 0x60000000U; /* must escape 0x7d, 0x7e */ + memcpy(network->xaccm, accm, sizeof(network->xaccm)); + err = 0; + break; + + case PPPIOCGMRU: + if (put_user(network->mru, user_arg)) + break; + err = 0; + break; + + case PPPIOCSMRU: + if (get_user(val, user_arg)) + break; + if (val < PPP_MRU) + val = PPP_MRU; + network->mru = val; + err = 0; + break; + + default: + err = -ENOTTY; + } + + return err; +} + +static const struct ppp_channel_ops ipwireless_ppp_channel_ops = { + .start_xmit = ipwireless_ppp_start_xmit, + .ioctl = ipwireless_ppp_ioctl +}; + +static void do_go_online(struct work_struct *work_go_online) +{ + struct ipw_network *network = + container_of(work_go_online, struct ipw_network, + work_go_online); + unsigned long flags; + + spin_lock_irqsave(&network->lock, flags); + if (!network->ppp_channel) { + struct ppp_channel *channel; + + spin_unlock_irqrestore(&network->lock, flags); + channel = kzalloc(sizeof(struct ppp_channel), GFP_KERNEL); + if (!channel) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": unable to allocate PPP channel\n"); + return; + } + channel->private = network; + channel->mtu = 16384; /* Wild guess */ + channel->hdrlen = 2; + channel->ops = &ipwireless_ppp_channel_ops; + + network->flags = 0; + network->rbits = 0; + network->mru = PPP_MRU; + memset(network->xaccm, 0, sizeof(network->xaccm)); + network->xaccm[0] = ~0U; + network->xaccm[3] = 0x60000000U; + network->raccm = ~0U; + if (ppp_register_channel(channel) < 0) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": unable to register PPP channel\n"); + kfree(channel); + return; + } + spin_lock_irqsave(&network->lock, flags); + network->ppp_channel = channel; + } + spin_unlock_irqrestore(&network->lock, flags); +} + +static void do_go_offline(struct work_struct *work_go_offline) +{ + struct ipw_network *network = + container_of(work_go_offline, struct ipw_network, + work_go_offline); + unsigned long flags; + + mutex_lock(&network->close_lock); + spin_lock_irqsave(&network->lock, flags); + if (network->ppp_channel != NULL) { + struct ppp_channel *channel = network->ppp_channel; + + network->ppp_channel = NULL; + spin_unlock_irqrestore(&network->lock, flags); + mutex_unlock(&network->close_lock); + ppp_unregister_channel(channel); + } else { + spin_unlock_irqrestore(&network->lock, flags); + mutex_unlock(&network->close_lock); + } +} + +void ipwireless_network_notify_control_line_change(struct ipw_network *network, + unsigned int channel_idx, + unsigned int control_lines, + unsigned int changed_mask) +{ + int i; + + if (channel_idx == IPW_CHANNEL_RAS) + network->ras_control_lines = control_lines; + + for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) { + struct ipw_tty *tty = + network->associated_ttys[channel_idx][i]; + + /* + * If it's associated with a tty (other than the RAS channel + * when we're online), then send the data to that tty. The RAS + * channel's data is handled above - it always goes through + * ppp_generic. + */ + if (tty) + ipwireless_tty_notify_control_line_change(tty, + channel_idx, + control_lines, + changed_mask); + } +} + +/* + * Some versions of firmware stuff packets with 0xff 0x03 (PPP: ALLSTATIONS, UI) + * bytes, which are required on sent packet, but not always present on received + * packets + */ +static struct sk_buff *ipw_packet_received_skb(unsigned char *data, + unsigned int length) +{ + struct sk_buff *skb; + + if (length > 2 && data[0] == PPP_ALLSTATIONS && data[1] == PPP_UI) { + length -= 2; + data += 2; + } + + skb = dev_alloc_skb(length + 4); + if (skb == NULL) + return NULL; + skb_reserve(skb, 2); + skb_put_data(skb, data, length); + + return skb; +} + +void ipwireless_network_packet_received(struct ipw_network *network, + unsigned int channel_idx, + unsigned char *data, + unsigned int length) +{ + int i; + unsigned long flags; + + for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) { + struct ipw_tty *tty = network->associated_ttys[channel_idx][i]; + + if (!tty) + continue; + + /* + * If it's associated with a tty (other than the RAS channel + * when we're online), then send the data to that tty. The RAS + * channel's data is handled above - it always goes through + * ppp_generic. + */ + if (channel_idx == IPW_CHANNEL_RAS + && (network->ras_control_lines & + IPW_CONTROL_LINE_DCD) != 0 + && ipwireless_tty_is_modem(tty)) { + /* + * If data came in on the RAS channel and this tty is + * the modem tty, and we are online, then we send it to + * the PPP layer. + */ + mutex_lock(&network->close_lock); + spin_lock_irqsave(&network->lock, flags); + if (network->ppp_channel != NULL) { + struct sk_buff *skb; + + spin_unlock_irqrestore(&network->lock, + flags); + + /* Send the data to the ppp_generic module. */ + skb = ipw_packet_received_skb(data, length); + if (skb) + ppp_input(network->ppp_channel, skb); + } else + spin_unlock_irqrestore(&network->lock, + flags); + mutex_unlock(&network->close_lock); + } + /* Otherwise we send it out the tty. */ + else + ipwireless_tty_received(tty, data, length); + } +} + +struct ipw_network *ipwireless_network_create(struct ipw_hardware *hw) +{ + struct ipw_network *network = + kzalloc(sizeof(struct ipw_network), GFP_KERNEL); + + if (!network) + return NULL; + + spin_lock_init(&network->lock); + mutex_init(&network->close_lock); + + network->hardware = hw; + + INIT_WORK(&network->work_go_online, do_go_online); + INIT_WORK(&network->work_go_offline, do_go_offline); + + ipwireless_associate_network(hw, network); + + return network; +} + +void ipwireless_network_free(struct ipw_network *network) +{ + network->shutting_down = 1; + + ipwireless_ppp_close(network); + flush_work(&network->work_go_online); + flush_work(&network->work_go_offline); + + ipwireless_stop_interrupts(network->hardware); + ipwireless_associate_network(network->hardware, NULL); + + kfree(network); +} + +void ipwireless_associate_network_tty(struct ipw_network *network, + unsigned int channel_idx, + struct ipw_tty *tty) +{ + int i; + + for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) + if (network->associated_ttys[channel_idx][i] == NULL) { + network->associated_ttys[channel_idx][i] = tty; + break; + } +} + +void ipwireless_disassociate_network_ttys(struct ipw_network *network, + unsigned int channel_idx) +{ + int i; + + for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) + network->associated_ttys[channel_idx][i] = NULL; +} + +void ipwireless_ppp_open(struct ipw_network *network) +{ + if (ipwireless_debug) + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": online\n"); + schedule_work(&network->work_go_online); +} + +void ipwireless_ppp_close(struct ipw_network *network) +{ + /* Disconnect from the wireless network. */ + if (ipwireless_debug) + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": offline\n"); + schedule_work(&network->work_go_offline); +} + +int ipwireless_ppp_channel_index(struct ipw_network *network) +{ + int ret = -1; + unsigned long flags; + + spin_lock_irqsave(&network->lock, flags); + if (network->ppp_channel != NULL) + ret = ppp_channel_index(network->ppp_channel); + spin_unlock_irqrestore(&network->lock, flags); + + return ret; +} + +int ipwireless_ppp_unit_number(struct ipw_network *network) +{ + int ret = -1; + unsigned long flags; + + spin_lock_irqsave(&network->lock, flags); + if (network->ppp_channel != NULL) + ret = ppp_unit_number(network->ppp_channel); + spin_unlock_irqrestore(&network->lock, flags); + + return ret; +} + +int ipwireless_ppp_mru(const struct ipw_network *network) +{ + return network->mru; +} diff --git a/drivers/tty/ipwireless/network.h b/drivers/tty/ipwireless/network.h new file mode 100644 index 000000000..784932a59 --- /dev/null +++ b/drivers/tty/ipwireless/network.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#ifndef _IPWIRELESS_CS_NETWORK_H_ +#define _IPWIRELESS_CS_NETWORK_H_ + +#include <linux/types.h> + +struct ipw_network; +struct ipw_tty; +struct ipw_hardware; + +/* Definitions of the different channels on the PCMCIA UE */ +#define IPW_CHANNEL_RAS 0 +#define IPW_CHANNEL_DIALLER 1 +#define IPW_CHANNEL_CONSOLE 2 +#define NO_OF_IPW_CHANNELS 5 + +void ipwireless_network_notify_control_line_change(struct ipw_network *net, + unsigned int channel_idx, unsigned int control_lines, + unsigned int control_mask); +void ipwireless_network_packet_received(struct ipw_network *net, + unsigned int channel_idx, unsigned char *data, + unsigned int length); +struct ipw_network *ipwireless_network_create(struct ipw_hardware *hw); +void ipwireless_network_free(struct ipw_network *net); +void ipwireless_associate_network_tty(struct ipw_network *net, + unsigned int channel_idx, struct ipw_tty *tty); +void ipwireless_disassociate_network_ttys(struct ipw_network *net, + unsigned int channel_idx); + +void ipwireless_ppp_open(struct ipw_network *net); + +void ipwireless_ppp_close(struct ipw_network *net); +int ipwireless_ppp_channel_index(struct ipw_network *net); +int ipwireless_ppp_unit_number(struct ipw_network *net); +int ipwireless_ppp_mru(const struct ipw_network *net); + +#endif diff --git a/drivers/tty/ipwireless/setup_protocol.h b/drivers/tty/ipwireless/setup_protocol.h new file mode 100644 index 000000000..d4a7ae257 --- /dev/null +++ b/drivers/tty/ipwireless/setup_protocol.h @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#ifndef _IPWIRELESS_CS_SETUP_PROTOCOL_H_ +#define _IPWIRELESS_CS_SETUP_PROTOCOL_H_ + +/* Version of the setup protocol and transport protocols */ +#define TL_SETUP_VERSION 1 + +#define TL_SETUP_VERSION_QRY_TMO 1000 +#define TL_SETUP_MAX_VERSION_QRY 30 + +/* Message numbers 0-9 are obsoleted and must not be reused! */ +#define TL_SETUP_SIGNO_GET_VERSION_QRY 10 +#define TL_SETUP_SIGNO_GET_VERSION_RSP 11 +#define TL_SETUP_SIGNO_CONFIG_MSG 12 +#define TL_SETUP_SIGNO_CONFIG_DONE_MSG 13 +#define TL_SETUP_SIGNO_OPEN_MSG 14 +#define TL_SETUP_SIGNO_CLOSE_MSG 15 + +#define TL_SETUP_SIGNO_INFO_MSG 20 +#define TL_SETUP_SIGNO_INFO_MSG_ACK 21 + +#define TL_SETUP_SIGNO_REBOOT_MSG 22 +#define TL_SETUP_SIGNO_REBOOT_MSG_ACK 23 + +/* Synchronous start-messages */ +struct tl_setup_get_version_qry { + unsigned char sig_no; /* TL_SETUP_SIGNO_GET_VERSION_QRY */ +} __attribute__ ((__packed__)); + +struct tl_setup_get_version_rsp { + unsigned char sig_no; /* TL_SETUP_SIGNO_GET_VERSION_RSP */ + unsigned char version; /* TL_SETUP_VERSION */ +} __attribute__ ((__packed__)); + +struct tl_setup_config_msg { + unsigned char sig_no; /* TL_SETUP_SIGNO_CONFIG_MSG */ + unsigned char port_no; + unsigned char prio_data; + unsigned char prio_ctrl; +} __attribute__ ((__packed__)); + +struct tl_setup_config_done_msg { + unsigned char sig_no; /* TL_SETUP_SIGNO_CONFIG_DONE_MSG */ +} __attribute__ ((__packed__)); + +/* Asynchronous messages */ +struct tl_setup_open_msg { + unsigned char sig_no; /* TL_SETUP_SIGNO_OPEN_MSG */ + unsigned char port_no; +} __attribute__ ((__packed__)); + +struct tl_setup_close_msg { + unsigned char sig_no; /* TL_SETUP_SIGNO_CLOSE_MSG */ + unsigned char port_no; +} __attribute__ ((__packed__)); + +/* Driver type - for use in tl_setup_info_msg.driver_type */ +#define COMM_DRIVER 0 +#define NDISWAN_DRIVER 1 +#define NDISWAN_DRIVER_MAJOR_VERSION 2 +#define NDISWAN_DRIVER_MINOR_VERSION 0 + +/* + * It should not matter when this message comes over as we just store the + * results and send the ACK. + */ +struct tl_setup_info_msg { + unsigned char sig_no; /* TL_SETUP_SIGNO_INFO_MSG */ + unsigned char driver_type; + unsigned char major_version; + unsigned char minor_version; +} __attribute__ ((__packed__)); + +struct tl_setup_info_msgAck { + unsigned char sig_no; /* TL_SETUP_SIGNO_INFO_MSG_ACK */ +} __attribute__ ((__packed__)); + +struct TlSetupRebootMsgAck { + unsigned char sig_no; /* TL_SETUP_SIGNO_REBOOT_MSG_ACK */ +} __attribute__ ((__packed__)); + +/* Define a union of all the msgs that the driver can receive from the card.*/ +union ipw_setup_rx_msg { + unsigned char sig_no; + struct tl_setup_get_version_rsp version_rsp_msg; + struct tl_setup_open_msg open_msg; + struct tl_setup_close_msg close_msg; + struct tl_setup_info_msg InfoMsg; + struct tl_setup_info_msgAck info_msg_ack; +} __attribute__ ((__packed__)); + +#endif /* _IPWIRELESS_CS_SETUP_PROTOCOL_H_ */ diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c new file mode 100644 index 000000000..cb0497184 --- /dev/null +++ b/drivers/tty/ipwireless/tty.c @@ -0,0 +1,635 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/ppp_defs.h> +#include <linux/if.h> +#include <linux/ppp-ioctl.h> +#include <linux/sched.h> +#include <linux/serial.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/tty_driver.h> +#include <linux/tty_flip.h> +#include <linux/uaccess.h> + +#include "tty.h" +#include "network.h" +#include "hardware.h" +#include "main.h" + +#define IPWIRELESS_PCMCIA_START (0) +#define IPWIRELESS_PCMCIA_MINORS (24) +#define IPWIRELESS_PCMCIA_MINOR_RANGE (8) + +#define TTYTYPE_MODEM (0) +#define TTYTYPE_MONITOR (1) +#define TTYTYPE_RAS_RAW (2) + +struct ipw_tty { + struct tty_port port; + int index; + struct ipw_hardware *hardware; + unsigned int channel_idx; + unsigned int secondary_channel_idx; + int tty_type; + struct ipw_network *network; + unsigned int control_lines; + struct mutex ipw_tty_mutex; + int tx_bytes_queued; + int closing; +}; + +static struct ipw_tty *ttys[IPWIRELESS_PCMCIA_MINORS]; + +static struct tty_driver *ipw_tty_driver; + +static char *tty_type_name(int tty_type) +{ + static char *channel_names[] = { + "modem", + "monitor", + "RAS-raw" + }; + + return channel_names[tty_type]; +} + +static struct ipw_tty *get_tty(int index) +{ + /* + * The 'ras_raw' channel is only available when 'loopback' mode + * is enabled. + * Number of minor starts with 16 (_RANGE * _RAS_RAW). + */ + if (!ipwireless_loopback && index >= + IPWIRELESS_PCMCIA_MINOR_RANGE * TTYTYPE_RAS_RAW) + return NULL; + + return ttys[index]; +} + +static int ipw_open(struct tty_struct *linux_tty, struct file *filp) +{ + struct ipw_tty *tty = get_tty(linux_tty->index); + + if (!tty) + return -ENODEV; + + mutex_lock(&tty->ipw_tty_mutex); + if (tty->port.count == 0) + tty->tx_bytes_queued = 0; + + tty->port.count++; + + tty->port.tty = linux_tty; + linux_tty->driver_data = tty; + tty->port.low_latency = 1; + + if (tty->tty_type == TTYTYPE_MODEM) + ipwireless_ppp_open(tty->network); + + mutex_unlock(&tty->ipw_tty_mutex); + + return 0; +} + +static void do_ipw_close(struct ipw_tty *tty) +{ + tty->port.count--; + + if (tty->port.count == 0) { + struct tty_struct *linux_tty = tty->port.tty; + + if (linux_tty != NULL) { + tty->port.tty = NULL; + linux_tty->driver_data = NULL; + + if (tty->tty_type == TTYTYPE_MODEM) + ipwireless_ppp_close(tty->network); + } + } +} + +static void ipw_hangup(struct tty_struct *linux_tty) +{ + struct ipw_tty *tty = linux_tty->driver_data; + + if (!tty) + return; + + mutex_lock(&tty->ipw_tty_mutex); + if (tty->port.count == 0) { + mutex_unlock(&tty->ipw_tty_mutex); + return; + } + + do_ipw_close(tty); + + mutex_unlock(&tty->ipw_tty_mutex); +} + +static void ipw_close(struct tty_struct *linux_tty, struct file *filp) +{ + ipw_hangup(linux_tty); +} + +/* Take data received from hardware, and send it out the tty */ +void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, + unsigned int length) +{ + int work = 0; + + mutex_lock(&tty->ipw_tty_mutex); + + if (!tty->port.count) { + mutex_unlock(&tty->ipw_tty_mutex); + return; + } + mutex_unlock(&tty->ipw_tty_mutex); + + work = tty_insert_flip_string(&tty->port, data, length); + + if (work != length) + printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME + ": %d chars not inserted to flip buffer!\n", + length - work); + + if (work) + tty_flip_buffer_push(&tty->port); +} + +static void ipw_write_packet_sent_callback(void *callback_data, + unsigned int packet_length) +{ + struct ipw_tty *tty = callback_data; + + /* + * Packet has been sent, so we subtract the number of bytes from our + * tally of outstanding TX bytes. + */ + tty->tx_bytes_queued -= packet_length; +} + +static int ipw_write(struct tty_struct *linux_tty, + const unsigned char *buf, int count) +{ + struct ipw_tty *tty = linux_tty->driver_data; + int room, ret; + + if (!tty) + return -ENODEV; + + mutex_lock(&tty->ipw_tty_mutex); + if (!tty->port.count) { + mutex_unlock(&tty->ipw_tty_mutex); + return -EINVAL; + } + + room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; + if (room < 0) + room = 0; + /* Don't allow caller to write any more than we have room for */ + if (count > room) + count = room; + + if (count == 0) { + mutex_unlock(&tty->ipw_tty_mutex); + return 0; + } + + ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS, + buf, count, + ipw_write_packet_sent_callback, tty); + if (ret < 0) { + mutex_unlock(&tty->ipw_tty_mutex); + return 0; + } + + tty->tx_bytes_queued += count; + mutex_unlock(&tty->ipw_tty_mutex); + + return count; +} + +static int ipw_write_room(struct tty_struct *linux_tty) +{ + struct ipw_tty *tty = linux_tty->driver_data; + int room; + + /* FIXME: Exactly how is the tty object locked here .. */ + if (!tty) + return -ENODEV; + + if (!tty->port.count) + return -EINVAL; + + room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued; + if (room < 0) + room = 0; + + return room; +} + +static int ipwireless_get_serial_info(struct ipw_tty *tty, + struct serial_struct __user *retinfo) +{ + struct serial_struct tmp; + + memset(&tmp, 0, sizeof(tmp)); + tmp.type = PORT_UNKNOWN; + tmp.line = tty->index; + tmp.baud_base = 115200; + + if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) + return -EFAULT; + + return 0; +} + +static int ipw_chars_in_buffer(struct tty_struct *linux_tty) +{ + struct ipw_tty *tty = linux_tty->driver_data; + + if (!tty) + return 0; + + if (!tty->port.count) + return 0; + + return tty->tx_bytes_queued; +} + +static int get_control_lines(struct ipw_tty *tty) +{ + unsigned int my = tty->control_lines; + unsigned int out = 0; + + if (my & IPW_CONTROL_LINE_RTS) + out |= TIOCM_RTS; + if (my & IPW_CONTROL_LINE_DTR) + out |= TIOCM_DTR; + if (my & IPW_CONTROL_LINE_CTS) + out |= TIOCM_CTS; + if (my & IPW_CONTROL_LINE_DSR) + out |= TIOCM_DSR; + if (my & IPW_CONTROL_LINE_DCD) + out |= TIOCM_CD; + + return out; +} + +static int set_control_lines(struct ipw_tty *tty, unsigned int set, + unsigned int clear) +{ + int ret; + + if (set & TIOCM_RTS) { + ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 1); + if (ret) + return ret; + if (tty->secondary_channel_idx != -1) { + ret = ipwireless_set_RTS(tty->hardware, + tty->secondary_channel_idx, 1); + if (ret) + return ret; + } + } + if (set & TIOCM_DTR) { + ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 1); + if (ret) + return ret; + if (tty->secondary_channel_idx != -1) { + ret = ipwireless_set_DTR(tty->hardware, + tty->secondary_channel_idx, 1); + if (ret) + return ret; + } + } + if (clear & TIOCM_RTS) { + ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 0); + if (tty->secondary_channel_idx != -1) { + ret = ipwireless_set_RTS(tty->hardware, + tty->secondary_channel_idx, 0); + if (ret) + return ret; + } + } + if (clear & TIOCM_DTR) { + ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 0); + if (tty->secondary_channel_idx != -1) { + ret = ipwireless_set_DTR(tty->hardware, + tty->secondary_channel_idx, 0); + if (ret) + return ret; + } + } + return 0; +} + +static int ipw_tiocmget(struct tty_struct *linux_tty) +{ + struct ipw_tty *tty = linux_tty->driver_data; + /* FIXME: Exactly how is the tty object locked here .. */ + + if (!tty) + return -ENODEV; + + if (!tty->port.count) + return -EINVAL; + + return get_control_lines(tty); +} + +static int +ipw_tiocmset(struct tty_struct *linux_tty, + unsigned int set, unsigned int clear) +{ + struct ipw_tty *tty = linux_tty->driver_data; + /* FIXME: Exactly how is the tty object locked here .. */ + + if (!tty) + return -ENODEV; + + if (!tty->port.count) + return -EINVAL; + + return set_control_lines(tty, set, clear); +} + +static int ipw_ioctl(struct tty_struct *linux_tty, + unsigned int cmd, unsigned long arg) +{ + struct ipw_tty *tty = linux_tty->driver_data; + + if (!tty) + return -ENODEV; + + if (!tty->port.count) + return -EINVAL; + + /* FIXME: Exactly how is the tty object locked here .. */ + + switch (cmd) { + case TIOCGSERIAL: + return ipwireless_get_serial_info(tty, (void __user *) arg); + + case TIOCSSERIAL: + return 0; /* Keeps the PCMCIA scripts happy. */ + } + + if (tty->tty_type == TTYTYPE_MODEM) { + switch (cmd) { + case PPPIOCGCHAN: + { + int chan = ipwireless_ppp_channel_index( + tty->network); + + if (chan < 0) + return -ENODEV; + if (put_user(chan, (int __user *) arg)) + return -EFAULT; + } + return 0; + + case PPPIOCGUNIT: + { + int unit = ipwireless_ppp_unit_number( + tty->network); + + if (unit < 0) + return -ENODEV; + if (put_user(unit, (int __user *) arg)) + return -EFAULT; + } + return 0; + + case FIONREAD: + { + int val = 0; + + if (put_user(val, (int __user *) arg)) + return -EFAULT; + } + return 0; + case TCFLSH: + return tty_perform_flush(linux_tty, arg); + } + } + return -ENOIOCTLCMD; +} + +static int add_tty(int j, + struct ipw_hardware *hardware, + struct ipw_network *network, int channel_idx, + int secondary_channel_idx, int tty_type) +{ + ttys[j] = kzalloc(sizeof(struct ipw_tty), GFP_KERNEL); + if (!ttys[j]) + return -ENOMEM; + ttys[j]->index = j; + ttys[j]->hardware = hardware; + ttys[j]->channel_idx = channel_idx; + ttys[j]->secondary_channel_idx = secondary_channel_idx; + ttys[j]->network = network; + ttys[j]->tty_type = tty_type; + mutex_init(&ttys[j]->ipw_tty_mutex); + tty_port_init(&ttys[j]->port); + + tty_port_register_device(&ttys[j]->port, ipw_tty_driver, j, NULL); + ipwireless_associate_network_tty(network, channel_idx, ttys[j]); + + if (secondary_channel_idx != -1) + ipwireless_associate_network_tty(network, + secondary_channel_idx, + ttys[j]); + /* check if we provide raw device (if loopback is enabled) */ + if (get_tty(j)) + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": registering %s device ttyIPWp%d\n", + tty_type_name(tty_type), j); + + return 0; +} + +struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hardware, + struct ipw_network *network) +{ + int i, j; + + for (i = 0; i < IPWIRELESS_PCMCIA_MINOR_RANGE; i++) { + int allfree = 1; + + for (j = i; j < IPWIRELESS_PCMCIA_MINORS; + j += IPWIRELESS_PCMCIA_MINOR_RANGE) + if (ttys[j] != NULL) { + allfree = 0; + break; + } + + if (allfree) { + j = i; + + if (add_tty(j, hardware, network, + IPW_CHANNEL_DIALLER, IPW_CHANNEL_RAS, + TTYTYPE_MODEM)) + return NULL; + + j += IPWIRELESS_PCMCIA_MINOR_RANGE; + if (add_tty(j, hardware, network, + IPW_CHANNEL_DIALLER, -1, + TTYTYPE_MONITOR)) + return NULL; + + j += IPWIRELESS_PCMCIA_MINOR_RANGE; + if (add_tty(j, hardware, network, + IPW_CHANNEL_RAS, -1, + TTYTYPE_RAS_RAW)) + return NULL; + + return ttys[i]; + } + } + return NULL; +} + +/* + * Must be called before ipwireless_network_free(). + */ +void ipwireless_tty_free(struct ipw_tty *tty) +{ + int j; + struct ipw_network *network = ttys[tty->index]->network; + + for (j = tty->index; j < IPWIRELESS_PCMCIA_MINORS; + j += IPWIRELESS_PCMCIA_MINOR_RANGE) { + struct ipw_tty *ttyj = ttys[j]; + + if (ttyj) { + mutex_lock(&ttyj->ipw_tty_mutex); + if (get_tty(j)) + printk(KERN_INFO IPWIRELESS_PCCARD_NAME + ": deregistering %s device ttyIPWp%d\n", + tty_type_name(ttyj->tty_type), j); + ttyj->closing = 1; + if (ttyj->port.tty != NULL) { + mutex_unlock(&ttyj->ipw_tty_mutex); + tty_vhangup(ttyj->port.tty); + /* FIXME: Exactly how is the tty object locked here + against a parallel ioctl etc */ + /* FIXME2: hangup does not mean all processes + * are gone */ + mutex_lock(&ttyj->ipw_tty_mutex); + } + while (ttyj->port.count) + do_ipw_close(ttyj); + ipwireless_disassociate_network_ttys(network, + ttyj->channel_idx); + tty_unregister_device(ipw_tty_driver, j); + tty_port_destroy(&ttyj->port); + ttys[j] = NULL; + mutex_unlock(&ttyj->ipw_tty_mutex); + kfree(ttyj); + } + } +} + +static const struct tty_operations tty_ops = { + .open = ipw_open, + .close = ipw_close, + .hangup = ipw_hangup, + .write = ipw_write, + .write_room = ipw_write_room, + .ioctl = ipw_ioctl, + .chars_in_buffer = ipw_chars_in_buffer, + .tiocmget = ipw_tiocmget, + .tiocmset = ipw_tiocmset, +}; + +int ipwireless_tty_init(void) +{ + int result; + + ipw_tty_driver = alloc_tty_driver(IPWIRELESS_PCMCIA_MINORS); + if (!ipw_tty_driver) + return -ENOMEM; + + ipw_tty_driver->driver_name = IPWIRELESS_PCCARD_NAME; + ipw_tty_driver->name = "ttyIPWp"; + ipw_tty_driver->major = 0; + ipw_tty_driver->minor_start = IPWIRELESS_PCMCIA_START; + ipw_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; + ipw_tty_driver->subtype = SERIAL_TYPE_NORMAL; + ipw_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; + ipw_tty_driver->init_termios = tty_std_termios; + ipw_tty_driver->init_termios.c_cflag = + B9600 | CS8 | CREAD | HUPCL | CLOCAL; + ipw_tty_driver->init_termios.c_ispeed = 9600; + ipw_tty_driver->init_termios.c_ospeed = 9600; + tty_set_operations(ipw_tty_driver, &tty_ops); + result = tty_register_driver(ipw_tty_driver); + if (result) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": failed to register tty driver\n"); + put_tty_driver(ipw_tty_driver); + return result; + } + + return 0; +} + +void ipwireless_tty_release(void) +{ + int ret; + + ret = tty_unregister_driver(ipw_tty_driver); + put_tty_driver(ipw_tty_driver); + if (ret != 0) + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": tty_unregister_driver failed with code %d\n", ret); +} + +int ipwireless_tty_is_modem(struct ipw_tty *tty) +{ + return tty->tty_type == TTYTYPE_MODEM; +} + +void +ipwireless_tty_notify_control_line_change(struct ipw_tty *tty, + unsigned int channel_idx, + unsigned int control_lines, + unsigned int changed_mask) +{ + unsigned int old_control_lines = tty->control_lines; + + tty->control_lines = (tty->control_lines & ~changed_mask) + | (control_lines & changed_mask); + + /* + * If DCD is de-asserted, we close the tty so pppd can tell that we + * have gone offline. + */ + if ((old_control_lines & IPW_CONTROL_LINE_DCD) + && !(tty->control_lines & IPW_CONTROL_LINE_DCD) + && tty->port.tty) { + tty_hangup(tty->port.tty); + } +} + diff --git a/drivers/tty/ipwireless/tty.h b/drivers/tty/ipwireless/tty.h new file mode 100644 index 000000000..ec698d9f3 --- /dev/null +++ b/drivers/tty/ipwireless/tty.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * IPWireless 3G PCMCIA Network Driver + * + * Original code + * by Stephen Blackheath <stephen@blacksapphire.com>, + * Ben Martel <benm@symmetric.co.nz> + * + * Copyrighted as follows: + * Copyright (C) 2004 by Symmetric Systems Ltd (NZ) + * + * Various driver changes and rewrites, port to new kernels + * Copyright (C) 2006-2007 Jiri Kosina + * + * Misc code cleanups and updates + * Copyright (C) 2007 David Sterba + */ + +#ifndef _IPWIRELESS_CS_TTY_H_ +#define _IPWIRELESS_CS_TTY_H_ + +#include <linux/types.h> +#include <linux/sched.h> + +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> + +struct ipw_tty; +struct ipw_network; +struct ipw_hardware; + +int ipwireless_tty_init(void); +void ipwireless_tty_release(void); + +struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hw, + struct ipw_network *net); +void ipwireless_tty_free(struct ipw_tty *tty); +void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data, + unsigned int length); +int ipwireless_tty_is_modem(struct ipw_tty *tty); +void ipwireless_tty_notify_control_line_change(struct ipw_tty *tty, + unsigned int channel_idx, + unsigned int control_lines, + unsigned int changed_mask); + +#endif |