| /* |
| * 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, |
| unsigned char *data, int len, |
| int is_last); |
| static void ipwireless_setup_timer(unsigned long data); |
| static void handle_received_CTRL_packet(struct ipw_hardware *hw, |
| unsigned int channel_idx, 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 { |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned char packet_rank:2; |
| unsigned char address:3; |
| unsigned char protocol:3; |
| #else |
| unsigned char protocol:3; |
| unsigned char address:3; |
| unsigned char packet_rank:2; |
| #endif |
| unsigned char length_lsb; |
| unsigned char length_msb; |
| }; |
| |
| struct nl_packet_header { |
| #if defined(__BIG_ENDIAN_BITFIELD) |
| unsigned char packet_rank:2; |
| unsigned char address:3; |
| unsigned char protocol:3; |
| #else |
| unsigned char protocol:3; |
| unsigned char address:3; |
| unsigned char packet_rank:2; |
| #endif |
| }; |
| |
| /* 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 int do_send_fragment(struct ipw_hardware *hw, const unsigned char *data, |
| unsigned length) |
| { |
| unsigned i; |
| unsigned long flags; |
| |
| start_timing(); |
| |
| if (length == 0) |
| return 0; |
| |
| if (length > hw->ll_mtu) |
| return -1; |
| |
| if (ipwireless_debug) |
| dump_data_bytes("send", data, length); |
| |
| spin_lock_irqsave(&hw->lock, flags); |
| |
| hw->tx_ready = 0; |
| |
| 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); |
| |
| return 0; |
| } |
| |
| static int 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; |
| |
| 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); |
| } |
| |
| return 0; |
| } |
| |
| 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); |
| list_del(&packet->queue); |
| hw->rx_pool_size--; |
| spin_unlock_irqrestore(&hw->lock, flags); |
| } else { |
| static int min_capacity = 256; |
| 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_tail(&packet->queue, &hw->rx_pool); |
| } |
| } |
| |
| static void queue_received_packet(struct ipw_hardware *hw, |
| unsigned int protocol, unsigned int address, |
| 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 incomming 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 incomming 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, |
| unsigned char *data, int len) |
| { |
| struct ipw_control_packet_body *body = |
| (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, |
| union nl_packet *packet, |
| unsigned short len) |
| { |
| unsigned int protocol = packet->hdr.protocol; |
| unsigned int address = packet->hdr.address; |
| unsigned int header_length; |
| 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); |
| |
| 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 pt_regs *regs) |
| { |
| struct ipw_hardware *hw = dev_id; |
| |
| if (hw->hw_version == HW_VERSION_1) |
| return ipwireless_handle_v1_interrupt(irq, hw); |
| else |
| return ipwireless_handle_v2_v3_interrupt(irq, hw); |
| } |
| |
| 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, |
| 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; |
| } |
| |
| 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); |
| 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, |
| unsigned char *data, int len, |
| int is_last) |
| { |
| union ipw_setup_rx_msg *rx_msg = (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); |
| 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); |
| setup_timer(&hw->setup_timer, ipwireless_setup_timer, |
| (unsigned long) hw); |
| |
| 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((unsigned long) hw); |
| } |
| |
| static void ipwireless_setup_timer(unsigned long data) |
| { |
| struct ipw_hardware *hw = (struct ipw_hardware *) data; |
| |
| 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_scheduled_work(); |
| |
| for (i = 0; i < NL_NUM_OF_ADDRESSES; i++) |
| if (hw->packet_assembler[i] != NULL) |
| 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; |
| } |