diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/net/wan/n2.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/net/wan/n2.c | 566 |
1 files changed, 0 insertions, 566 deletions
diff --git a/ANDROID_3.4.5/drivers/net/wan/n2.c b/ANDROID_3.4.5/drivers/net/wan/n2.c deleted file mode 100644 index 315bf09d..00000000 --- a/ANDROID_3.4.5/drivers/net/wan/n2.c +++ /dev/null @@ -1,566 +0,0 @@ -/* - * SDL Inc. RISCom/N2 synchronous serial card driver for Linux - * - * Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License - * as published by the Free Software Foundation. - * - * For information see <http://www.kernel.org/pub/linux/utils/net/hdlc/> - * - * Note: integrated CSU/DSU/DDS are not supported by this driver - * - * Sources of information: - * Hitachi HD64570 SCA User's Manual - * SDL Inc. PPP/HDLC/CISCO driver - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/capability.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/in.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/moduleparam.h> -#include <linux/netdevice.h> -#include <linux/hdlc.h> -#include <asm/io.h> -#include "hd64570.h" - - -static const char* version = "SDL RISCom/N2 driver version: 1.15"; -static const char* devname = "RISCom/N2"; - -#undef DEBUG_PKT -#define DEBUG_RINGS - -#define USE_WINDOWSIZE 16384 -#define USE_BUS16BITS 1 -#define CLOCK_BASE 9830400 /* 9.8304 MHz */ -#define MAX_PAGES 16 /* 16 RAM pages at max */ -#define MAX_RAM_SIZE 0x80000 /* 512 KB */ -#if MAX_RAM_SIZE > MAX_PAGES * USE_WINDOWSIZE -#undef MAX_RAM_SIZE -#define MAX_RAM_SIZE (MAX_PAGES * USE_WINDOWSIZE) -#endif -#define N2_IOPORTS 0x10 -#define NEED_DETECT_RAM -#define NEED_SCA_MSCI_INTR -#define MAX_TX_BUFFERS 10 - -static char *hw; /* pointer to hw=xxx command line string */ - -/* RISCom/N2 Board Registers */ - -/* PC Control Register */ -#define N2_PCR 0 -#define PCR_RUNSCA 1 /* Run 64570 */ -#define PCR_VPM 2 /* Enable VPM - needed if using RAM above 1 MB */ -#define PCR_ENWIN 4 /* Open window */ -#define PCR_BUS16 8 /* 16-bit bus */ - - -/* Memory Base Address Register */ -#define N2_BAR 2 - - -/* Page Scan Register */ -#define N2_PSR 4 -#define WIN16K 0x00 -#define WIN32K 0x20 -#define WIN64K 0x40 -#define PSR_WINBITS 0x60 -#define PSR_DMAEN 0x80 -#define PSR_PAGEBITS 0x0F - - -/* Modem Control Reg */ -#define N2_MCR 6 -#define CLOCK_OUT_PORT1 0x80 -#define CLOCK_OUT_PORT0 0x40 -#define TX422_PORT1 0x20 -#define TX422_PORT0 0x10 -#define DSR_PORT1 0x08 -#define DSR_PORT0 0x04 -#define DTR_PORT1 0x02 -#define DTR_PORT0 0x01 - - -typedef struct port_s { - struct net_device *dev; - struct card_s *card; - spinlock_t lock; /* TX lock */ - sync_serial_settings settings; - int valid; /* port enabled */ - int rxpart; /* partial frame received, next frame invalid*/ - unsigned short encoding; - unsigned short parity; - u16 rxin; /* rx ring buffer 'in' pointer */ - u16 txin; /* tx ring buffer 'in' and 'last' pointers */ - u16 txlast; - u8 rxs, txs, tmc; /* SCA registers */ - u8 phy_node; /* physical port # - 0 or 1 */ - u8 log_node; /* logical port # */ -}port_t; - - - -typedef struct card_s { - u8 __iomem *winbase; /* ISA window base address */ - u32 phy_winbase; /* ISA physical base address */ - u32 ram_size; /* number of bytes */ - u16 io; /* IO Base address */ - u16 buff_offset; /* offset of first buffer of first channel */ - u16 rx_ring_buffers; /* number of buffers in a ring */ - u16 tx_ring_buffers; - u8 irq; /* IRQ (3-15) */ - - port_t ports[2]; - struct card_s *next_card; -}card_t; - - -static card_t *first_card; -static card_t **new_card = &first_card; - - -#define sca_reg(reg, card) (0x8000 | (card)->io | \ - ((reg) & 0x0F) | (((reg) & 0xF0) << 6)) -#define sca_in(reg, card) inb(sca_reg(reg, card)) -#define sca_out(value, reg, card) outb(value, sca_reg(reg, card)) -#define sca_inw(reg, card) inw(sca_reg(reg, card)) -#define sca_outw(value, reg, card) outw(value, sca_reg(reg, card)) - -#define port_to_card(port) ((port)->card) -#define log_node(port) ((port)->log_node) -#define phy_node(port) ((port)->phy_node) -#define winsize(card) (USE_WINDOWSIZE) -#define winbase(card) ((card)->winbase) -#define get_port(card, port) ((card)->ports[port].valid ? \ - &(card)->ports[port] : NULL) - - -static __inline__ u8 sca_get_page(card_t *card) -{ - return inb(card->io + N2_PSR) & PSR_PAGEBITS; -} - - -static __inline__ void openwin(card_t *card, u8 page) -{ - u8 psr = inb(card->io + N2_PSR); - outb((psr & ~PSR_PAGEBITS) | page, card->io + N2_PSR); -} - - -#include "hd64570.c" - - -static void n2_set_iface(port_t *port) -{ - card_t *card = port->card; - int io = card->io; - u8 mcr = inb(io + N2_MCR); - u8 msci = get_msci(port); - u8 rxs = port->rxs & CLK_BRG_MASK; - u8 txs = port->txs & CLK_BRG_MASK; - - switch(port->settings.clock_type) { - case CLOCK_INT: - mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0; - rxs |= CLK_BRG_RX; /* BRG output */ - txs |= CLK_RXCLK_TX; /* RX clock */ - break; - - case CLOCK_TXINT: - mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0; - rxs |= CLK_LINE_RX; /* RXC input */ - txs |= CLK_BRG_TX; /* BRG output */ - break; - - case CLOCK_TXFROMRX: - mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0; - rxs |= CLK_LINE_RX; /* RXC input */ - txs |= CLK_RXCLK_TX; /* RX clock */ - break; - - default: /* Clock EXTernal */ - mcr &= port->phy_node ? ~CLOCK_OUT_PORT1 : ~CLOCK_OUT_PORT0; - rxs |= CLK_LINE_RX; /* RXC input */ - txs |= CLK_LINE_TX; /* TXC input */ - } - - outb(mcr, io + N2_MCR); - port->rxs = rxs; - port->txs = txs; - sca_out(rxs, msci + RXS, card); - sca_out(txs, msci + TXS, card); - sca_set_port(port); -} - - - -static int n2_open(struct net_device *dev) -{ - port_t *port = dev_to_port(dev); - int io = port->card->io; - u8 mcr = inb(io + N2_MCR) | (port->phy_node ? TX422_PORT1:TX422_PORT0); - int result; - - result = hdlc_open(dev); - if (result) - return result; - - mcr &= port->phy_node ? ~DTR_PORT1 : ~DTR_PORT0; /* set DTR ON */ - outb(mcr, io + N2_MCR); - - outb(inb(io + N2_PCR) | PCR_ENWIN, io + N2_PCR); /* open window */ - outb(inb(io + N2_PSR) | PSR_DMAEN, io + N2_PSR); /* enable dma */ - sca_open(dev); - n2_set_iface(port); - return 0; -} - - - -static int n2_close(struct net_device *dev) -{ - port_t *port = dev_to_port(dev); - int io = port->card->io; - u8 mcr = inb(io+N2_MCR) | (port->phy_node ? TX422_PORT1 : TX422_PORT0); - - sca_close(dev); - mcr |= port->phy_node ? DTR_PORT1 : DTR_PORT0; /* set DTR OFF */ - outb(mcr, io + N2_MCR); - hdlc_close(dev); - return 0; -} - - - -static int n2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -{ - const size_t size = sizeof(sync_serial_settings); - sync_serial_settings new_line; - sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; - port_t *port = dev_to_port(dev); - -#ifdef DEBUG_RINGS - if (cmd == SIOCDEVPRIVATE) { - sca_dump_rings(dev); - return 0; - } -#endif - if (cmd != SIOCWANDEV) - return hdlc_ioctl(dev, ifr, cmd); - - switch(ifr->ifr_settings.type) { - case IF_GET_IFACE: - ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; - if (ifr->ifr_settings.size < size) { - ifr->ifr_settings.size = size; /* data size wanted */ - return -ENOBUFS; - } - if (copy_to_user(line, &port->settings, size)) - return -EFAULT; - return 0; - - case IF_IFACE_SYNC_SERIAL: - if(!capable(CAP_NET_ADMIN)) - return -EPERM; - - if (copy_from_user(&new_line, line, size)) - return -EFAULT; - - if (new_line.clock_type != CLOCK_EXT && - new_line.clock_type != CLOCK_TXFROMRX && - new_line.clock_type != CLOCK_INT && - new_line.clock_type != CLOCK_TXINT) - return -EINVAL; /* No such clock setting */ - - if (new_line.loopback != 0 && new_line.loopback != 1) - return -EINVAL; - - memcpy(&port->settings, &new_line, size); /* Update settings */ - n2_set_iface(port); - return 0; - - default: - return hdlc_ioctl(dev, ifr, cmd); - } -} - - - -static void n2_destroy_card(card_t *card) -{ - int cnt; - - for (cnt = 0; cnt < 2; cnt++) - if (card->ports[cnt].card) { - struct net_device *dev = port_to_dev(&card->ports[cnt]); - unregister_hdlc_device(dev); - } - - if (card->irq) - free_irq(card->irq, card); - - if (card->winbase) { - iounmap(card->winbase); - release_mem_region(card->phy_winbase, USE_WINDOWSIZE); - } - - if (card->io) - release_region(card->io, N2_IOPORTS); - if (card->ports[0].dev) - free_netdev(card->ports[0].dev); - if (card->ports[1].dev) - free_netdev(card->ports[1].dev); - kfree(card); -} - -static const struct net_device_ops n2_ops = { - .ndo_open = n2_open, - .ndo_stop = n2_close, - .ndo_change_mtu = hdlc_change_mtu, - .ndo_start_xmit = hdlc_start_xmit, - .ndo_do_ioctl = n2_ioctl, -}; - -static int __init n2_run(unsigned long io, unsigned long irq, - unsigned long winbase, long valid0, long valid1) -{ - card_t *card; - u8 cnt, pcr; - int i; - - if (io < 0x200 || io > 0x3FF || (io % N2_IOPORTS) != 0) { - pr_err("invalid I/O port value\n"); - return -ENODEV; - } - - if (irq < 3 || irq > 15 || irq == 6) /* FIXME */ { - pr_err("invalid IRQ value\n"); - return -ENODEV; - } - - if (winbase < 0xA0000 || winbase > 0xFFFFF || (winbase & 0xFFF) != 0) { - pr_err("invalid RAM value\n"); - return -ENODEV; - } - - card = kzalloc(sizeof(card_t), GFP_KERNEL); - if (card == NULL) - return -ENOBUFS; - - card->ports[0].dev = alloc_hdlcdev(&card->ports[0]); - card->ports[1].dev = alloc_hdlcdev(&card->ports[1]); - if (!card->ports[0].dev || !card->ports[1].dev) { - pr_err("unable to allocate memory\n"); - n2_destroy_card(card); - return -ENOMEM; - } - - if (!request_region(io, N2_IOPORTS, devname)) { - pr_err("I/O port region in use\n"); - n2_destroy_card(card); - return -EBUSY; - } - card->io = io; - - if (request_irq(irq, sca_intr, 0, devname, card)) { - pr_err("could not allocate IRQ\n"); - n2_destroy_card(card); - return -EBUSY; - } - card->irq = irq; - - if (!request_mem_region(winbase, USE_WINDOWSIZE, devname)) { - pr_err("could not request RAM window\n"); - n2_destroy_card(card); - return -EBUSY; - } - card->phy_winbase = winbase; - card->winbase = ioremap(winbase, USE_WINDOWSIZE); - if (!card->winbase) { - pr_err("ioremap() failed\n"); - n2_destroy_card(card); - return -EFAULT; - } - - outb(0, io + N2_PCR); - outb(winbase >> 12, io + N2_BAR); - - switch (USE_WINDOWSIZE) { - case 16384: - outb(WIN16K, io + N2_PSR); - break; - - case 32768: - outb(WIN32K, io + N2_PSR); - break; - - case 65536: - outb(WIN64K, io + N2_PSR); - break; - - default: - pr_err("invalid window size\n"); - n2_destroy_card(card); - return -ENODEV; - } - - pcr = PCR_ENWIN | PCR_VPM | (USE_BUS16BITS ? PCR_BUS16 : 0); - outb(pcr, io + N2_PCR); - - card->ram_size = sca_detect_ram(card, card->winbase, MAX_RAM_SIZE); - - /* number of TX + RX buffers for one port */ - i = card->ram_size / ((valid0 + valid1) * (sizeof(pkt_desc) + - HDLC_MAX_MRU)); - - card->tx_ring_buffers = min(i / 2, MAX_TX_BUFFERS); - card->rx_ring_buffers = i - card->tx_ring_buffers; - - card->buff_offset = (valid0 + valid1) * sizeof(pkt_desc) * - (card->tx_ring_buffers + card->rx_ring_buffers); - - pr_info("RISCom/N2 %u KB RAM, IRQ%u, using %u TX + %u RX packets rings\n", - card->ram_size / 1024, card->irq, - card->tx_ring_buffers, card->rx_ring_buffers); - - if (card->tx_ring_buffers < 1) { - pr_err("RAM test failed\n"); - n2_destroy_card(card); - return -EIO; - } - - pcr |= PCR_RUNSCA; /* run SCA */ - outb(pcr, io + N2_PCR); - outb(0, io + N2_MCR); - - sca_init(card, 0); - for (cnt = 0; cnt < 2; cnt++) { - port_t *port = &card->ports[cnt]; - struct net_device *dev = port_to_dev(port); - hdlc_device *hdlc = dev_to_hdlc(dev); - - if ((cnt == 0 && !valid0) || (cnt == 1 && !valid1)) - continue; - - port->phy_node = cnt; - port->valid = 1; - - if ((cnt == 1) && valid0) - port->log_node = 1; - - spin_lock_init(&port->lock); - dev->irq = irq; - dev->mem_start = winbase; - dev->mem_end = winbase + USE_WINDOWSIZE - 1; - dev->tx_queue_len = 50; - dev->netdev_ops = &n2_ops; - hdlc->attach = sca_attach; - hdlc->xmit = sca_xmit; - port->settings.clock_type = CLOCK_EXT; - port->card = card; - - if (register_hdlc_device(dev)) { - pr_warn("unable to register hdlc device\n"); - port->card = NULL; - n2_destroy_card(card); - return -ENOBUFS; - } - sca_init_port(port); /* Set up SCA memory */ - - netdev_info(dev, "RISCom/N2 node %d\n", port->phy_node); - } - - *new_card = card; - new_card = &card->next_card; - - return 0; -} - - - -static int __init n2_init(void) -{ - if (hw==NULL) { -#ifdef MODULE - pr_info("no card initialized\n"); -#endif - return -EINVAL; /* no parameters specified, abort */ - } - - pr_info("%s\n", version); - - do { - unsigned long io, irq, ram; - long valid[2] = { 0, 0 }; /* Default = both ports disabled */ - - io = simple_strtoul(hw, &hw, 0); - - if (*hw++ != ',') - break; - irq = simple_strtoul(hw, &hw, 0); - - if (*hw++ != ',') - break; - ram = simple_strtoul(hw, &hw, 0); - - if (*hw++ != ',') - break; - while(1) { - if (*hw == '0' && !valid[0]) - valid[0] = 1; /* Port 0 enabled */ - else if (*hw == '1' && !valid[1]) - valid[1] = 1; /* Port 1 enabled */ - else - break; - hw++; - } - - if (!valid[0] && !valid[1]) - break; /* at least one port must be used */ - - if (*hw == ':' || *hw == '\x0') - n2_run(io, irq, ram, valid[0], valid[1]); - - if (*hw == '\x0') - return first_card ? 0 : -EINVAL; - }while(*hw++ == ':'); - - pr_err("invalid hardware parameters\n"); - return first_card ? 0 : -EINVAL; -} - - -static void __exit n2_cleanup(void) -{ - card_t *card = first_card; - - while (card) { - card_t *ptr = card; - card = card->next_card; - n2_destroy_card(ptr); - } -} - - -module_init(n2_init); -module_exit(n2_cleanup); - -MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>"); -MODULE_DESCRIPTION("RISCom/N2 serial port driver"); -MODULE_LICENSE("GPL v2"); -module_param(hw, charp, 0444); -MODULE_PARM_DESC(hw, "io,irq,ram,ports:io,irq,..."); |