diff options
Diffstat (limited to 'drivers/net/wan/pci200syn.c')
| -rw-r--r-- | drivers/net/wan/pci200syn.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/drivers/net/wan/pci200syn.c b/drivers/net/wan/pci200syn.c new file mode 100644 index 00000000000..8dea07b4799 --- /dev/null +++ b/drivers/net/wan/pci200syn.c @@ -0,0 +1,488 @@ +/* + * Goramo PCI200SYN synchronous serial card driver for Linux + * + * Copyright (C) 2002-2003 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://hq.pm.waw.pl/hdlc/ + * + * Sources of information: + * Hitachi HD64572 SCA-II User's Manual + * PLX Technology Inc. PCI9052 Data Book + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sched.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 <linux/pci.h> +#include <asm/delay.h> +#include <asm/io.h> + +#include "hd64572.h" + +static const char* version = "Goramo PCI200SYN driver version: 1.16"; +static const char* devname = "PCI200SYN"; + +#undef DEBUG_PKT +#define DEBUG_RINGS + +#define PCI200SYN_PLX_SIZE 0x80 /* PLX control window size (128b) */ +#define PCI200SYN_SCA_SIZE 0x400 /* SCA window size (1Kb) */ +#define ALL_PAGES_ALWAYS_MAPPED +#define NEED_DETECT_RAM +#define NEED_SCA_MSCI_INTR +#define MAX_TX_BUFFERS 10 + +static int pci_clock_freq = 33000000; +#define CLOCK_BASE pci_clock_freq + +#define PCI_VENDOR_ID_GORAMO 0x10B5 /* uses PLX:9050 ID - this card */ +#define PCI_DEVICE_ID_PCI200SYN 0x9050 /* doesn't have its own ID */ + + +/* + * PLX PCI9052 local configuration and shared runtime registers. + * This structure can be used to access 9052 registers (memory mapped). + */ +typedef struct { + u32 loc_addr_range[4]; /* 00-0Ch : Local Address Ranges */ + u32 loc_rom_range; /* 10h : Local ROM Range */ + u32 loc_addr_base[4]; /* 14-20h : Local Address Base Addrs */ + u32 loc_rom_base; /* 24h : Local ROM Base */ + u32 loc_bus_descr[4]; /* 28-34h : Local Bus Descriptors */ + u32 rom_bus_descr; /* 38h : ROM Bus Descriptor */ + u32 cs_base[4]; /* 3C-48h : Chip Select Base Addrs */ + u32 intr_ctrl_stat; /* 4Ch : Interrupt Control/Status */ + u32 init_ctrl; /* 50h : EEPROM ctrl, Init Ctrl, etc */ +}plx9052; + + + +typedef struct port_s { + struct net_device *dev; + struct card_s *card; + spinlock_t lock; /* TX lock */ + sync_serial_settings settings; + 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 */ +}port_t; + + + +typedef struct card_s { + u8 __iomem *rambase; /* buffer memory base (virtual) */ + u8 __iomem *scabase; /* SCA memory base (virtual) */ + plx9052 __iomem *plxbase;/* PLX registers memory base (virtual) */ + u16 rx_ring_buffers; /* number of buffers in a ring */ + u16 tx_ring_buffers; + u16 buff_offset; /* offset of first buffer of first channel */ + u8 irq; /* interrupt request level */ + + port_t ports[2]; +}card_t; + + +#define sca_in(reg, card) readb(card->scabase + (reg)) +#define sca_out(value, reg, card) writeb(value, card->scabase + (reg)) +#define sca_inw(reg, card) readw(card->scabase + (reg)) +#define sca_outw(value, reg, card) writew(value, card->scabase + (reg)) +#define sca_inl(reg, card) readl(card->scabase + (reg)) +#define sca_outl(value, reg, card) writel(value, card->scabase + (reg)) + +#define port_to_card(port) (port->card) +#define log_node(port) (port->phy_node) +#define phy_node(port) (port->phy_node) +#define winbase(card) (card->rambase) +#define get_port(card, port) (&card->ports[port]) +#define sca_flush(card) (sca_in(IER0, card)); + +static inline void new_memcpy_toio(char __iomem *dest, char *src, int length) +{ + int len; + do { + len = length > 256 ? 256 : length; + memcpy_toio(dest, src, len); + dest += len; + src += len; + length -= len; + readb(dest); + } while (len); +} + +#undef memcpy_toio +#define memcpy_toio new_memcpy_toio + +#include "hd6457x.c" + + +static void pci200_set_iface(port_t *port) +{ + card_t *card = port->card; + u16 msci = get_msci(port); + u8 rxs = port->rxs & CLK_BRG_MASK; + u8 txs = port->txs & CLK_BRG_MASK; + + sca_out(EXS_TES1, (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS, + port_to_card(port)); + switch(port->settings.clock_type) { + case CLOCK_INT: + rxs |= CLK_BRG; /* BRG output */ + txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */ + break; + + case CLOCK_TXINT: + rxs |= CLK_LINE; /* RXC input */ + txs |= CLK_PIN_OUT | CLK_BRG; /* BRG output */ + break; + + case CLOCK_TXFROMRX: + rxs |= CLK_LINE; /* RXC input */ + txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */ + break; + + default: /* EXTernal clock */ + rxs |= CLK_LINE; /* RXC input */ + txs |= CLK_PIN_OUT | CLK_LINE; /* TXC input */ + break; + } + + port->rxs = rxs; + port->txs = txs; + sca_out(rxs, msci + RXS, card); + sca_out(txs, msci + TXS, card); + sca_set_port(port); +} + + + +static int pci200_open(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + + int result = hdlc_open(dev); + if (result) + return result; + + sca_open(dev); + pci200_set_iface(port); + sca_flush(port_to_card(port)); + return 0; +} + + + +static int pci200_close(struct net_device *dev) +{ + sca_close(dev); + sca_flush(port_to_card(dev_to_port(dev))); + hdlc_close(dev); + return 0; +} + + + +static int pci200_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_V35; + if (ifr->ifr_settings.size < size) { + ifr->ifr_settings.size = size; /* data size wanted */ + return -ENOBUFS; + } + if (copy_to_user(line, &port->settings, size)) + return -EFAULT; + return 0; + + case IF_IFACE_V35: + 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 */ + pci200_set_iface(port); + sca_flush(port_to_card(port)); + return 0; + + default: + return hdlc_ioctl(dev, ifr, cmd); + } +} + + + +static void pci200_pci_remove_one(struct pci_dev *pdev) +{ + int i; + card_t *card = pci_get_drvdata(pdev); + + for(i = 0; i < 2; i++) + if (card->ports[i].card) { + struct net_device *dev = port_to_dev(&card->ports[i]); + unregister_hdlc_device(dev); + } + + if (card->irq) + free_irq(card->irq, card); + + if (card->rambase) + iounmap(card->rambase); + if (card->scabase) + iounmap(card->scabase); + if (card->plxbase) + iounmap(card->plxbase); + + pci_release_regions(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + 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 int __devinit pci200_pci_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + card_t *card; + u8 rev_id; + u32 __iomem *p; + int i; + u32 ramsize; + u32 ramphys; /* buffer memory base */ + u32 scaphys; /* SCA memory base */ + u32 plxphys; /* PLX registers memory base */ + +#ifndef MODULE + static int printed_version; + if (!printed_version++) + printk(KERN_INFO "%s\n", version); +#endif + + i = pci_enable_device(pdev); + if (i) + return i; + + i = pci_request_regions(pdev, "PCI200SYN"); + if (i) { + pci_disable_device(pdev); + return i; + } + + card = kmalloc(sizeof(card_t), GFP_KERNEL); + if (card == NULL) { + printk(KERN_ERR "pci200syn: unable to allocate memory\n"); + pci_release_regions(pdev); + pci_disable_device(pdev); + return -ENOBUFS; + } + memset(card, 0, sizeof(card_t)); + pci_set_drvdata(pdev, card); + 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) { + printk(KERN_ERR "pci200syn: unable to allocate memory\n"); + pci200_pci_remove_one(pdev); + return -ENOMEM; + } + + pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id); + if (pci_resource_len(pdev, 0) != PCI200SYN_PLX_SIZE || + pci_resource_len(pdev, 2) != PCI200SYN_SCA_SIZE || + pci_resource_len(pdev, 3) < 16384) { + printk(KERN_ERR "pci200syn: invalid card EEPROM parameters\n"); + pci200_pci_remove_one(pdev); + return -EFAULT; + } + + plxphys = pci_resource_start(pdev,0) & PCI_BASE_ADDRESS_MEM_MASK; + card->plxbase = ioremap(plxphys, PCI200SYN_PLX_SIZE); + + scaphys = pci_resource_start(pdev,2) & PCI_BASE_ADDRESS_MEM_MASK; + card->scabase = ioremap(scaphys, PCI200SYN_SCA_SIZE); + + ramphys = pci_resource_start(pdev,3) & PCI_BASE_ADDRESS_MEM_MASK; + card->rambase = ioremap(ramphys, pci_resource_len(pdev,3)); + + if (card->plxbase == NULL || + card->scabase == NULL || + card->rambase == NULL) { + printk(KERN_ERR "pci200syn: ioremap() failed\n"); + pci200_pci_remove_one(pdev); + } + + /* Reset PLX */ + p = &card->plxbase->init_ctrl; + writel(readl(p) | 0x40000000, p); + readl(p); /* Flush the write - do not use sca_flush */ + udelay(1); + + writel(readl(p) & ~0x40000000, p); + readl(p); /* Flush the write - do not use sca_flush */ + udelay(1); + + ramsize = sca_detect_ram(card, card->rambase, + pci_resource_len(pdev, 3)); + + /* number of TX + RX buffers for one port - this is dual port card */ + i = ramsize / (2 * (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 = 2 * sizeof(pkt_desc) * (card->tx_ring_buffers + + card->rx_ring_buffers); + + printk(KERN_INFO "pci200syn: %u KB RAM at 0x%x, IRQ%u, using %u TX +" + " %u RX packets rings\n", ramsize / 1024, ramphys, + pdev->irq, card->tx_ring_buffers, card->rx_ring_buffers); + + if (card->tx_ring_buffers < 1) { + printk(KERN_ERR "pci200syn: RAM test failed\n"); + pci200_pci_remove_one(pdev); + return -EFAULT; + } + + /* Enable interrupts on the PCI bridge */ + p = &card->plxbase->intr_ctrl_stat; + writew(readw(p) | 0x0040, p); + + /* Allocate IRQ */ + if(request_irq(pdev->irq, sca_intr, SA_SHIRQ, devname, card)) { + printk(KERN_WARNING "pci200syn: could not allocate IRQ%d.\n", + pdev->irq); + pci200_pci_remove_one(pdev); + return -EBUSY; + } + card->irq = pdev->irq; + + sca_init(card, 0); + + for(i = 0; i < 2; i++) { + port_t *port = &card->ports[i]; + struct net_device *dev = port_to_dev(port); + hdlc_device *hdlc = dev_to_hdlc(dev); + port->phy_node = i; + + spin_lock_init(&port->lock); + SET_MODULE_OWNER(dev); + dev->irq = card->irq; + dev->mem_start = ramphys; + dev->mem_end = ramphys + ramsize - 1; + dev->tx_queue_len = 50; + dev->do_ioctl = pci200_ioctl; + dev->open = pci200_open; + dev->stop = pci200_close; + hdlc->attach = sca_attach; + hdlc->xmit = sca_xmit; + port->settings.clock_type = CLOCK_EXT; + port->card = card; + if(register_hdlc_device(dev)) { + printk(KERN_ERR "pci200syn: unable to register hdlc " + "device\n"); + port->card = NULL; + pci200_pci_remove_one(pdev); + return -ENOBUFS; + } + sca_init_sync_port(port); /* Set up SCA memory */ + + printk(KERN_INFO "%s: PCI200SYN node %d\n", + dev->name, port->phy_node); + } + + sca_flush(card); + return 0; +} + + + +static struct pci_device_id pci200_pci_tbl[] __devinitdata = { + { PCI_VENDOR_ID_GORAMO, PCI_DEVICE_ID_PCI200SYN, PCI_ANY_ID, + PCI_ANY_ID, 0, 0, 0 }, + { 0, } +}; + + +static struct pci_driver pci200_pci_driver = { + .name = "PCI200SYN", + .id_table = pci200_pci_tbl, + .probe = pci200_pci_init_one, + .remove = pci200_pci_remove_one, +}; + + +static int __init pci200_init_module(void) +{ +#ifdef MODULE + printk(KERN_INFO "%s\n", version); +#endif + if (pci_clock_freq < 1000000 || pci_clock_freq > 80000000) { + printk(KERN_ERR "pci200syn: Invalid PCI clock frequency\n"); + return -EINVAL; + } + return pci_module_init(&pci200_pci_driver); +} + + + +static void __exit pci200_cleanup_module(void) +{ + pci_unregister_driver(&pci200_pci_driver); +} + +MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>"); +MODULE_DESCRIPTION("Goramo PCI200SYN serial port driver"); +MODULE_LICENSE("GPL v2"); +MODULE_DEVICE_TABLE(pci, pci200_pci_tbl); +module_param(pci_clock_freq, int, 0444); +MODULE_PARM_DESC(pci_clock_freq, "System PCI clock frequency in Hz"); +module_init(pci200_init_module); +module_exit(pci200_cleanup_module); |