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path: root/drivers/net/wan/pci200syn.c
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Diffstat (limited to 'drivers/net/wan/pci200syn.c')
-rw-r--r--drivers/net/wan/pci200syn.c488
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 000000000000..8dea07b47999
--- /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);