125763b3cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
27517c1b7SKrzysztof Halasa /*
37517c1b7SKrzysztof Halasa * Cyclades PC300 synchronous serial card driver for Linux
47517c1b7SKrzysztof Halasa *
561e0a6a2SKrzysztof Hałasa * Copyright (C) 2000-2008 Krzysztof Halasa <khc@pm.waw.pl>
67517c1b7SKrzysztof Halasa *
7ab274959SAlexander A. Klimov * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>.
87517c1b7SKrzysztof Halasa *
97517c1b7SKrzysztof Halasa * Sources of information:
107517c1b7SKrzysztof Halasa * Hitachi HD64572 SCA-II User's Manual
1161e0a6a2SKrzysztof Hałasa * Original Cyclades PC300 Linux driver
127517c1b7SKrzysztof Halasa *
137517c1b7SKrzysztof Halasa * This driver currently supports only PC300/RSV (V.24/V.35) and
147517c1b7SKrzysztof Halasa * PC300/X21 cards.
157517c1b7SKrzysztof Halasa */
167517c1b7SKrzysztof Halasa
1712a3bfefSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
1812a3bfefSJoe Perches
197517c1b7SKrzysztof Halasa #include <linux/module.h>
207517c1b7SKrzysztof Halasa #include <linux/kernel.h>
217517c1b7SKrzysztof Halasa #include <linux/slab.h>
227517c1b7SKrzysztof Halasa #include <linux/sched.h>
237517c1b7SKrzysztof Halasa #include <linux/types.h>
247517c1b7SKrzysztof Halasa #include <linux/fcntl.h>
257517c1b7SKrzysztof Halasa #include <linux/in.h>
267517c1b7SKrzysztof Halasa #include <linux/string.h>
277517c1b7SKrzysztof Halasa #include <linux/errno.h>
287517c1b7SKrzysztof Halasa #include <linux/init.h>
297517c1b7SKrzysztof Halasa #include <linux/ioport.h>
307517c1b7SKrzysztof Halasa #include <linux/moduleparam.h>
317517c1b7SKrzysztof Halasa #include <linux/netdevice.h>
327517c1b7SKrzysztof Halasa #include <linux/hdlc.h>
337517c1b7SKrzysztof Halasa #include <linux/pci.h>
347517c1b7SKrzysztof Halasa #include <linux/delay.h>
357517c1b7SKrzysztof Halasa #include <asm/io.h>
367517c1b7SKrzysztof Halasa
377517c1b7SKrzysztof Halasa #include "hd64572.h"
387517c1b7SKrzysztof Halasa
397517c1b7SKrzysztof Halasa #undef DEBUG_PKT
407517c1b7SKrzysztof Halasa #define DEBUG_RINGS
417517c1b7SKrzysztof Halasa
427517c1b7SKrzysztof Halasa #define PC300_PLX_SIZE 0x80 /* PLX control window size (128 B) */
437517c1b7SKrzysztof Halasa #define PC300_SCA_SIZE 0x400 /* SCA window size (1 KB) */
447517c1b7SKrzysztof Halasa #define MAX_TX_BUFFERS 10
457517c1b7SKrzysztof Halasa
467517c1b7SKrzysztof Halasa static int pci_clock_freq = 33000000;
47ae644048SPeng Li static int use_crystal_clock;
487517c1b7SKrzysztof Halasa static unsigned int CLOCK_BASE;
497517c1b7SKrzysztof Halasa
507517c1b7SKrzysztof Halasa /* Masks to access the init_ctrl PLX register */
517517c1b7SKrzysztof Halasa #define PC300_CLKSEL_MASK (0x00000004UL)
527517c1b7SKrzysztof Halasa #define PC300_CHMEDIA_MASK(port) (0x00000020UL << ((port) * 3))
537517c1b7SKrzysztof Halasa #define PC300_CTYPE_MASK (0x00000800UL)
547517c1b7SKrzysztof Halasa
557517c1b7SKrzysztof Halasa enum { PC300_RSV = 1, PC300_X21, PC300_TE }; /* card types */
567517c1b7SKrzysztof Halasa
57ef1806a8SPeng Li /* PLX PCI9050-1 local configuration and shared runtime registers.
587517c1b7SKrzysztof Halasa * This structure can be used to access 9050 registers (memory mapped).
597517c1b7SKrzysztof Halasa */
607517c1b7SKrzysztof Halasa typedef struct {
617517c1b7SKrzysztof Halasa u32 loc_addr_range[4]; /* 00-0Ch : Local Address Ranges */
627517c1b7SKrzysztof Halasa u32 loc_rom_range; /* 10h : Local ROM Range */
637517c1b7SKrzysztof Halasa u32 loc_addr_base[4]; /* 14-20h : Local Address Base Addrs */
647517c1b7SKrzysztof Halasa u32 loc_rom_base; /* 24h : Local ROM Base */
657517c1b7SKrzysztof Halasa u32 loc_bus_descr[4]; /* 28-34h : Local Bus Descriptors */
667517c1b7SKrzysztof Halasa u32 rom_bus_descr; /* 38h : ROM Bus Descriptor */
677517c1b7SKrzysztof Halasa u32 cs_base[4]; /* 3C-48h : Chip Select Base Addrs */
687517c1b7SKrzysztof Halasa u32 intr_ctrl_stat; /* 4Ch : Interrupt Control/Status */
697517c1b7SKrzysztof Halasa u32 init_ctrl; /* 50h : EEPROM ctrl, Init Ctrl, etc */
707517c1b7SKrzysztof Halasa } plx9050;
717517c1b7SKrzysztof Halasa
727517c1b7SKrzysztof Halasa typedef struct port_s {
73abc9d91aSKrzysztof Hałasa struct napi_struct napi;
7461e0a6a2SKrzysztof Hałasa struct net_device *netdev;
757517c1b7SKrzysztof Halasa struct card_s *card;
767517c1b7SKrzysztof Halasa spinlock_t lock; /* TX lock */
777517c1b7SKrzysztof Halasa sync_serial_settings settings;
787517c1b7SKrzysztof Halasa int rxpart; /* partial frame received, next frame invalid*/
797517c1b7SKrzysztof Halasa unsigned short encoding;
807517c1b7SKrzysztof Halasa unsigned short parity;
817517c1b7SKrzysztof Halasa unsigned int iface;
827517c1b7SKrzysztof Halasa u16 rxin; /* rx ring buffer 'in' pointer */
837517c1b7SKrzysztof Halasa u16 txin; /* tx ring buffer 'in' and 'last' pointers */
847517c1b7SKrzysztof Halasa u16 txlast;
857517c1b7SKrzysztof Halasa u8 rxs, txs, tmc; /* SCA registers */
8661e0a6a2SKrzysztof Hałasa u8 chan; /* physical port # - 0 or 1 */
877517c1b7SKrzysztof Halasa } port_t;
887517c1b7SKrzysztof Halasa
897517c1b7SKrzysztof Halasa typedef struct card_s {
907517c1b7SKrzysztof Halasa int type; /* RSV, X21, etc. */
917517c1b7SKrzysztof Halasa int n_ports; /* 1 or 2 ports */
92184123dbSAl Viro u8 __iomem *rambase; /* buffer memory base (virtual) */
93184123dbSAl Viro u8 __iomem *scabase; /* SCA memory base (virtual) */
947517c1b7SKrzysztof Halasa plx9050 __iomem *plxbase; /* PLX registers memory base (virtual) */
957517c1b7SKrzysztof Halasa u32 init_ctrl_value; /* Saved value - 9050 bug workaround */
967517c1b7SKrzysztof Halasa u16 rx_ring_buffers; /* number of buffers in a ring */
977517c1b7SKrzysztof Halasa u16 tx_ring_buffers;
987517c1b7SKrzysztof Halasa u16 buff_offset; /* offset of first buffer of first channel */
997517c1b7SKrzysztof Halasa u8 irq; /* interrupt request level */
1007517c1b7SKrzysztof Halasa
1017517c1b7SKrzysztof Halasa port_t ports[2];
1027517c1b7SKrzysztof Halasa } card_t;
1037517c1b7SKrzysztof Halasa
1047517c1b7SKrzysztof Halasa #define get_port(card, port) ((port) < (card)->n_ports ? \
1057517c1b7SKrzysztof Halasa (&(card)->ports[port]) : (NULL))
1067517c1b7SKrzysztof Halasa
1076b40aba3SKrzysztof Hałasa #include "hd64572.c"
1087517c1b7SKrzysztof Halasa
pc300_set_iface(port_t * port)1097517c1b7SKrzysztof Halasa static void pc300_set_iface(port_t *port)
1107517c1b7SKrzysztof Halasa {
1117517c1b7SKrzysztof Halasa card_t *card = port->card;
112184123dbSAl Viro u32 __iomem *init_ctrl = &card->plxbase->init_ctrl;
1137517c1b7SKrzysztof Halasa u16 msci = get_msci(port);
1147517c1b7SKrzysztof Halasa u8 rxs = port->rxs & CLK_BRG_MASK;
1157517c1b7SKrzysztof Halasa u8 txs = port->txs & CLK_BRG_MASK;
1167517c1b7SKrzysztof Halasa
11761e0a6a2SKrzysztof Hałasa sca_out(EXS_TES1, (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
11861e0a6a2SKrzysztof Hałasa port->card);
1197517c1b7SKrzysztof Halasa switch (port->settings.clock_type) {
1207517c1b7SKrzysztof Halasa case CLOCK_INT:
1217517c1b7SKrzysztof Halasa rxs |= CLK_BRG; /* BRG output */
1227517c1b7SKrzysztof Halasa txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
1237517c1b7SKrzysztof Halasa break;
1247517c1b7SKrzysztof Halasa
1257517c1b7SKrzysztof Halasa case CLOCK_TXINT:
1267517c1b7SKrzysztof Halasa rxs |= CLK_LINE; /* RXC input */
1277517c1b7SKrzysztof Halasa txs |= CLK_PIN_OUT | CLK_BRG; /* BRG output */
1287517c1b7SKrzysztof Halasa break;
1297517c1b7SKrzysztof Halasa
1307517c1b7SKrzysztof Halasa case CLOCK_TXFROMRX:
1317517c1b7SKrzysztof Halasa rxs |= CLK_LINE; /* RXC input */
1327517c1b7SKrzysztof Halasa txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
1337517c1b7SKrzysztof Halasa break;
1347517c1b7SKrzysztof Halasa
1357517c1b7SKrzysztof Halasa default: /* EXTernal clock */
1367517c1b7SKrzysztof Halasa rxs |= CLK_LINE; /* RXC input */
1377517c1b7SKrzysztof Halasa txs |= CLK_PIN_OUT | CLK_LINE; /* TXC input */
1387517c1b7SKrzysztof Halasa break;
1397517c1b7SKrzysztof Halasa }
1407517c1b7SKrzysztof Halasa
1417517c1b7SKrzysztof Halasa port->rxs = rxs;
1427517c1b7SKrzysztof Halasa port->txs = txs;
1437517c1b7SKrzysztof Halasa sca_out(rxs, msci + RXS, card);
1447517c1b7SKrzysztof Halasa sca_out(txs, msci + TXS, card);
1457517c1b7SKrzysztof Halasa sca_set_port(port);
1467517c1b7SKrzysztof Halasa
1477517c1b7SKrzysztof Halasa if (port->card->type == PC300_RSV) {
1487517c1b7SKrzysztof Halasa if (port->iface == IF_IFACE_V35)
1497517c1b7SKrzysztof Halasa writel(card->init_ctrl_value |
15061e0a6a2SKrzysztof Hałasa PC300_CHMEDIA_MASK(port->chan), init_ctrl);
1517517c1b7SKrzysztof Halasa else
1527517c1b7SKrzysztof Halasa writel(card->init_ctrl_value &
15361e0a6a2SKrzysztof Hałasa ~PC300_CHMEDIA_MASK(port->chan), init_ctrl);
1547517c1b7SKrzysztof Halasa }
1557517c1b7SKrzysztof Halasa }
1567517c1b7SKrzysztof Halasa
pc300_open(struct net_device * dev)1577517c1b7SKrzysztof Halasa static int pc300_open(struct net_device *dev)
1587517c1b7SKrzysztof Halasa {
1597517c1b7SKrzysztof Halasa port_t *port = dev_to_port(dev);
1607517c1b7SKrzysztof Halasa int result = hdlc_open(dev);
161a657c8b4SPeng Li
1627517c1b7SKrzysztof Halasa if (result)
1637517c1b7SKrzysztof Halasa return result;
1647517c1b7SKrzysztof Halasa
1657517c1b7SKrzysztof Halasa sca_open(dev);
1667517c1b7SKrzysztof Halasa pc300_set_iface(port);
1677517c1b7SKrzysztof Halasa return 0;
1687517c1b7SKrzysztof Halasa }
1697517c1b7SKrzysztof Halasa
pc300_close(struct net_device * dev)1707517c1b7SKrzysztof Halasa static int pc300_close(struct net_device *dev)
1717517c1b7SKrzysztof Halasa {
1727517c1b7SKrzysztof Halasa sca_close(dev);
1737517c1b7SKrzysztof Halasa hdlc_close(dev);
1747517c1b7SKrzysztof Halasa return 0;
1757517c1b7SKrzysztof Halasa }
1767517c1b7SKrzysztof Halasa
pc300_siocdevprivate(struct net_device * dev,struct ifreq * ifr,void __user * data,int cmd)17773d74f61SArnd Bergmann static int pc300_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
17873d74f61SArnd Bergmann void __user *data, int cmd)
17973d74f61SArnd Bergmann {
18073d74f61SArnd Bergmann #ifdef DEBUG_RINGS
18173d74f61SArnd Bergmann if (cmd == SIOCDEVPRIVATE) {
18273d74f61SArnd Bergmann sca_dump_rings(dev);
18373d74f61SArnd Bergmann return 0;
18473d74f61SArnd Bergmann }
18573d74f61SArnd Bergmann #endif
18673d74f61SArnd Bergmann return -EOPNOTSUPP;
18773d74f61SArnd Bergmann }
18873d74f61SArnd Bergmann
pc300_ioctl(struct net_device * dev,struct if_settings * ifs)189*ad7eab2aSArnd Bergmann static int pc300_ioctl(struct net_device *dev, struct if_settings *ifs)
1907517c1b7SKrzysztof Halasa {
1917517c1b7SKrzysztof Halasa const size_t size = sizeof(sync_serial_settings);
1927517c1b7SKrzysztof Halasa sync_serial_settings new_line;
193*ad7eab2aSArnd Bergmann sync_serial_settings __user *line = ifs->ifs_ifsu.sync;
1947517c1b7SKrzysztof Halasa int new_type;
1957517c1b7SKrzysztof Halasa port_t *port = dev_to_port(dev);
1967517c1b7SKrzysztof Halasa
197*ad7eab2aSArnd Bergmann if (ifs->type == IF_GET_IFACE) {
198*ad7eab2aSArnd Bergmann ifs->type = port->iface;
199*ad7eab2aSArnd Bergmann if (ifs->size < size) {
200*ad7eab2aSArnd Bergmann ifs->size = size; /* data size wanted */
2017517c1b7SKrzysztof Halasa return -ENOBUFS;
2027517c1b7SKrzysztof Halasa }
2037517c1b7SKrzysztof Halasa if (copy_to_user(line, &port->settings, size))
2047517c1b7SKrzysztof Halasa return -EFAULT;
2057517c1b7SKrzysztof Halasa return 0;
2067517c1b7SKrzysztof Halasa }
2077517c1b7SKrzysztof Halasa
2087517c1b7SKrzysztof Halasa if (port->card->type == PC300_X21 &&
209*ad7eab2aSArnd Bergmann (ifs->type == IF_IFACE_SYNC_SERIAL ||
210*ad7eab2aSArnd Bergmann ifs->type == IF_IFACE_X21))
2117517c1b7SKrzysztof Halasa new_type = IF_IFACE_X21;
2127517c1b7SKrzysztof Halasa
2137517c1b7SKrzysztof Halasa else if (port->card->type == PC300_RSV &&
214*ad7eab2aSArnd Bergmann (ifs->type == IF_IFACE_SYNC_SERIAL ||
215*ad7eab2aSArnd Bergmann ifs->type == IF_IFACE_V35))
2167517c1b7SKrzysztof Halasa new_type = IF_IFACE_V35;
2177517c1b7SKrzysztof Halasa
2187517c1b7SKrzysztof Halasa else if (port->card->type == PC300_RSV &&
219*ad7eab2aSArnd Bergmann ifs->type == IF_IFACE_V24)
2207517c1b7SKrzysztof Halasa new_type = IF_IFACE_V24;
2217517c1b7SKrzysztof Halasa
2227517c1b7SKrzysztof Halasa else
223*ad7eab2aSArnd Bergmann return hdlc_ioctl(dev, ifs);
2247517c1b7SKrzysztof Halasa
2257517c1b7SKrzysztof Halasa if (!capable(CAP_NET_ADMIN))
2267517c1b7SKrzysztof Halasa return -EPERM;
2277517c1b7SKrzysztof Halasa
2287517c1b7SKrzysztof Halasa if (copy_from_user(&new_line, line, size))
2297517c1b7SKrzysztof Halasa return -EFAULT;
2307517c1b7SKrzysztof Halasa
2317517c1b7SKrzysztof Halasa if (new_line.clock_type != CLOCK_EXT &&
2327517c1b7SKrzysztof Halasa new_line.clock_type != CLOCK_TXFROMRX &&
2337517c1b7SKrzysztof Halasa new_line.clock_type != CLOCK_INT &&
2347517c1b7SKrzysztof Halasa new_line.clock_type != CLOCK_TXINT)
2357517c1b7SKrzysztof Halasa return -EINVAL; /* No such clock setting */
2367517c1b7SKrzysztof Halasa
2377517c1b7SKrzysztof Halasa if (new_line.loopback != 0 && new_line.loopback != 1)
2387517c1b7SKrzysztof Halasa return -EINVAL;
2397517c1b7SKrzysztof Halasa
2407517c1b7SKrzysztof Halasa memcpy(&port->settings, &new_line, size); /* Update settings */
2417517c1b7SKrzysztof Halasa port->iface = new_type;
2427517c1b7SKrzysztof Halasa pc300_set_iface(port);
2437517c1b7SKrzysztof Halasa return 0;
2447517c1b7SKrzysztof Halasa }
2457517c1b7SKrzysztof Halasa
pc300_pci_remove_one(struct pci_dev * pdev)2467517c1b7SKrzysztof Halasa static void pc300_pci_remove_one(struct pci_dev *pdev)
2477517c1b7SKrzysztof Halasa {
2487517c1b7SKrzysztof Halasa int i;
2497517c1b7SKrzysztof Halasa card_t *card = pci_get_drvdata(pdev);
2507517c1b7SKrzysztof Halasa
2517517c1b7SKrzysztof Halasa for (i = 0; i < 2; i++)
25261e0a6a2SKrzysztof Hałasa if (card->ports[i].card)
25361e0a6a2SKrzysztof Hałasa unregister_hdlc_device(card->ports[i].netdev);
2547517c1b7SKrzysztof Halasa
2557517c1b7SKrzysztof Halasa if (card->irq)
2567517c1b7SKrzysztof Halasa free_irq(card->irq, card);
2577517c1b7SKrzysztof Halasa
2587517c1b7SKrzysztof Halasa if (card->rambase)
2597517c1b7SKrzysztof Halasa iounmap(card->rambase);
2607517c1b7SKrzysztof Halasa if (card->scabase)
2617517c1b7SKrzysztof Halasa iounmap(card->scabase);
2627517c1b7SKrzysztof Halasa if (card->plxbase)
2637517c1b7SKrzysztof Halasa iounmap(card->plxbase);
2647517c1b7SKrzysztof Halasa
2657517c1b7SKrzysztof Halasa pci_release_regions(pdev);
2667517c1b7SKrzysztof Halasa pci_disable_device(pdev);
26761e0a6a2SKrzysztof Hałasa if (card->ports[0].netdev)
26861e0a6a2SKrzysztof Hałasa free_netdev(card->ports[0].netdev);
26961e0a6a2SKrzysztof Hałasa if (card->ports[1].netdev)
27061e0a6a2SKrzysztof Hałasa free_netdev(card->ports[1].netdev);
2717517c1b7SKrzysztof Halasa kfree(card);
2727517c1b7SKrzysztof Halasa }
2737517c1b7SKrzysztof Halasa
274991990a1SKrzysztof Hałasa static const struct net_device_ops pc300_ops = {
275991990a1SKrzysztof Hałasa .ndo_open = pc300_open,
276991990a1SKrzysztof Hałasa .ndo_stop = pc300_close,
277991990a1SKrzysztof Hałasa .ndo_start_xmit = hdlc_start_xmit,
278*ad7eab2aSArnd Bergmann .ndo_siocwandev = pc300_ioctl,
27973d74f61SArnd Bergmann .ndo_siocdevprivate = pc300_siocdevprivate,
280991990a1SKrzysztof Hałasa };
2817517c1b7SKrzysztof Halasa
pc300_pci_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)282aeea6bbfSBill Pemberton static int pc300_pci_init_one(struct pci_dev *pdev,
2837517c1b7SKrzysztof Halasa const struct pci_device_id *ent)
2847517c1b7SKrzysztof Halasa {
2857517c1b7SKrzysztof Halasa card_t *card;
2867517c1b7SKrzysztof Halasa u32 __iomem *p;
2877517c1b7SKrzysztof Halasa int i;
2887517c1b7SKrzysztof Halasa u32 ramsize;
2897517c1b7SKrzysztof Halasa u32 ramphys; /* buffer memory base */
2907517c1b7SKrzysztof Halasa u32 scaphys; /* SCA memory base */
2917517c1b7SKrzysztof Halasa u32 plxphys; /* PLX registers memory base */
2927517c1b7SKrzysztof Halasa
2937517c1b7SKrzysztof Halasa i = pci_enable_device(pdev);
2947517c1b7SKrzysztof Halasa if (i)
2957517c1b7SKrzysztof Halasa return i;
2967517c1b7SKrzysztof Halasa
2977517c1b7SKrzysztof Halasa i = pci_request_regions(pdev, "PC300");
2987517c1b7SKrzysztof Halasa if (i) {
2997517c1b7SKrzysztof Halasa pci_disable_device(pdev);
3007517c1b7SKrzysztof Halasa return i;
3017517c1b7SKrzysztof Halasa }
3027517c1b7SKrzysztof Halasa
303dd00cc48SYoann Padioleau card = kzalloc(sizeof(card_t), GFP_KERNEL);
3040cd2135cSPeng Li if (!card) {
3057517c1b7SKrzysztof Halasa pci_release_regions(pdev);
3067517c1b7SKrzysztof Halasa pci_disable_device(pdev);
3077517c1b7SKrzysztof Halasa return -ENOBUFS;
3087517c1b7SKrzysztof Halasa }
3097517c1b7SKrzysztof Halasa pci_set_drvdata(pdev, card);
3107517c1b7SKrzysztof Halasa
3117517c1b7SKrzysztof Halasa if (pci_resource_len(pdev, 0) != PC300_PLX_SIZE ||
3127517c1b7SKrzysztof Halasa pci_resource_len(pdev, 2) != PC300_SCA_SIZE ||
3137517c1b7SKrzysztof Halasa pci_resource_len(pdev, 3) < 16384) {
31412a3bfefSJoe Perches pr_err("invalid card EEPROM parameters\n");
3157517c1b7SKrzysztof Halasa pc300_pci_remove_one(pdev);
3167517c1b7SKrzysztof Halasa return -EFAULT;
3177517c1b7SKrzysztof Halasa }
3187517c1b7SKrzysztof Halasa
3197517c1b7SKrzysztof Halasa plxphys = pci_resource_start(pdev, 0) & PCI_BASE_ADDRESS_MEM_MASK;
3207517c1b7SKrzysztof Halasa card->plxbase = ioremap(plxphys, PC300_PLX_SIZE);
3217517c1b7SKrzysztof Halasa
3227517c1b7SKrzysztof Halasa scaphys = pci_resource_start(pdev, 2) & PCI_BASE_ADDRESS_MEM_MASK;
3237517c1b7SKrzysztof Halasa card->scabase = ioremap(scaphys, PC300_SCA_SIZE);
3247517c1b7SKrzysztof Halasa
3257517c1b7SKrzysztof Halasa ramphys = pci_resource_start(pdev, 3) & PCI_BASE_ADDRESS_MEM_MASK;
326275f165fSArjan van de Ven card->rambase = pci_ioremap_bar(pdev, 3);
3277517c1b7SKrzysztof Halasa
3280cd2135cSPeng Li if (!card->plxbase || !card->scabase || !card->rambase) {
32912a3bfefSJoe Perches pr_err("ioremap() failed\n");
3307517c1b7SKrzysztof Halasa pc300_pci_remove_one(pdev);
3312a39e7aaSPan Bian return -ENOMEM;
3327517c1b7SKrzysztof Halasa }
3337517c1b7SKrzysztof Halasa
3347517c1b7SKrzysztof Halasa /* PLX PCI 9050 workaround for local configuration register read bug */
3357517c1b7SKrzysztof Halasa pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, scaphys);
336184123dbSAl Viro card->init_ctrl_value = readl(&((plx9050 __iomem *)card->scabase)->init_ctrl);
3377517c1b7SKrzysztof Halasa pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, plxphys);
3387517c1b7SKrzysztof Halasa
3396476a907SKrzysztof Hałasa if (pdev->device == PCI_DEVICE_ID_PC300_TE_1 ||
3406476a907SKrzysztof Hałasa pdev->device == PCI_DEVICE_ID_PC300_TE_2)
3416476a907SKrzysztof Hałasa card->type = PC300_TE; /* not fully supported */
3426476a907SKrzysztof Hałasa else if (card->init_ctrl_value & PC300_CTYPE_MASK)
3436476a907SKrzysztof Hałasa card->type = PC300_X21;
3446476a907SKrzysztof Hałasa else
3456476a907SKrzysztof Hałasa card->type = PC300_RSV;
3466476a907SKrzysztof Hałasa
3476476a907SKrzysztof Hałasa if (pdev->device == PCI_DEVICE_ID_PC300_RX_1 ||
3486476a907SKrzysztof Hałasa pdev->device == PCI_DEVICE_ID_PC300_TE_1)
3496476a907SKrzysztof Hałasa card->n_ports = 1;
3506476a907SKrzysztof Hałasa else
3516476a907SKrzysztof Hałasa card->n_ports = 2;
3526476a907SKrzysztof Hałasa
353d72f78dbSPeng Li for (i = 0; i < card->n_ports; i++) {
354d72f78dbSPeng Li card->ports[i].netdev = alloc_hdlcdev(&card->ports[i]);
355d72f78dbSPeng Li if (!card->ports[i].netdev) {
35612a3bfefSJoe Perches pr_err("unable to allocate memory\n");
3576476a907SKrzysztof Hałasa pc300_pci_remove_one(pdev);
3586476a907SKrzysztof Hałasa return -ENOMEM;
3596476a907SKrzysztof Hałasa }
360d72f78dbSPeng Li }
3616476a907SKrzysztof Hałasa
3627517c1b7SKrzysztof Halasa /* Reset PLX */
3637517c1b7SKrzysztof Halasa p = &card->plxbase->init_ctrl;
3647517c1b7SKrzysztof Halasa writel(card->init_ctrl_value | 0x40000000, p);
3657517c1b7SKrzysztof Halasa readl(p); /* Flush the write - do not use sca_flush */
3667517c1b7SKrzysztof Halasa udelay(1);
3677517c1b7SKrzysztof Halasa
3687517c1b7SKrzysztof Halasa writel(card->init_ctrl_value, p);
3697517c1b7SKrzysztof Halasa readl(p); /* Flush the write - do not use sca_flush */
3707517c1b7SKrzysztof Halasa udelay(1);
3717517c1b7SKrzysztof Halasa
3727517c1b7SKrzysztof Halasa /* Reload Config. Registers from EEPROM */
3737517c1b7SKrzysztof Halasa writel(card->init_ctrl_value | 0x20000000, p);
3747517c1b7SKrzysztof Halasa readl(p); /* Flush the write - do not use sca_flush */
3757517c1b7SKrzysztof Halasa udelay(1);
3767517c1b7SKrzysztof Halasa
3777517c1b7SKrzysztof Halasa writel(card->init_ctrl_value, p);
3787517c1b7SKrzysztof Halasa readl(p); /* Flush the write - do not use sca_flush */
3797517c1b7SKrzysztof Halasa udelay(1);
3807517c1b7SKrzysztof Halasa
3817517c1b7SKrzysztof Halasa ramsize = sca_detect_ram(card, card->rambase,
3827517c1b7SKrzysztof Halasa pci_resource_len(pdev, 3));
3837517c1b7SKrzysztof Halasa
3847517c1b7SKrzysztof Halasa if (use_crystal_clock)
3857517c1b7SKrzysztof Halasa card->init_ctrl_value &= ~PC300_CLKSEL_MASK;
3867517c1b7SKrzysztof Halasa else
3877517c1b7SKrzysztof Halasa card->init_ctrl_value |= PC300_CLKSEL_MASK;
3887517c1b7SKrzysztof Halasa
3897517c1b7SKrzysztof Halasa writel(card->init_ctrl_value, &card->plxbase->init_ctrl);
3907517c1b7SKrzysztof Halasa /* number of TX + RX buffers for one port */
3917517c1b7SKrzysztof Halasa i = ramsize / (card->n_ports * (sizeof(pkt_desc) + HDLC_MAX_MRU));
3927517c1b7SKrzysztof Halasa card->tx_ring_buffers = min(i / 2, MAX_TX_BUFFERS);
3937517c1b7SKrzysztof Halasa card->rx_ring_buffers = i - card->tx_ring_buffers;
3947517c1b7SKrzysztof Halasa
3957517c1b7SKrzysztof Halasa card->buff_offset = card->n_ports * sizeof(pkt_desc) *
3967517c1b7SKrzysztof Halasa (card->tx_ring_buffers + card->rx_ring_buffers);
3977517c1b7SKrzysztof Halasa
39812a3bfefSJoe Perches pr_info("PC300/%s, %u KB RAM at 0x%x, IRQ%u, using %u TX + %u RX packets rings\n",
3997517c1b7SKrzysztof Halasa card->type == PC300_X21 ? "X21" :
4007517c1b7SKrzysztof Halasa card->type == PC300_TE ? "TE" : "RSV",
4017517c1b7SKrzysztof Halasa ramsize / 1024, ramphys, pdev->irq,
4027517c1b7SKrzysztof Halasa card->tx_ring_buffers, card->rx_ring_buffers);
4037517c1b7SKrzysztof Halasa
4047517c1b7SKrzysztof Halasa if (card->tx_ring_buffers < 1) {
40512a3bfefSJoe Perches pr_err("RAM test failed\n");
4067517c1b7SKrzysztof Halasa pc300_pci_remove_one(pdev);
4077517c1b7SKrzysztof Halasa return -EFAULT;
4087517c1b7SKrzysztof Halasa }
4097517c1b7SKrzysztof Halasa
4107517c1b7SKrzysztof Halasa /* Enable interrupts on the PCI bridge, LINTi1 active low */
4117517c1b7SKrzysztof Halasa writew(0x0041, &card->plxbase->intr_ctrl_stat);
4127517c1b7SKrzysztof Halasa
4137517c1b7SKrzysztof Halasa /* Allocate IRQ */
41496783436SKrzysztof Hałasa if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, "pc300", card)) {
41512a3bfefSJoe Perches pr_warn("could not allocate IRQ%d\n", pdev->irq);
4167517c1b7SKrzysztof Halasa pc300_pci_remove_one(pdev);
4177517c1b7SKrzysztof Halasa return -EBUSY;
4187517c1b7SKrzysztof Halasa }
4197517c1b7SKrzysztof Halasa card->irq = pdev->irq;
4207517c1b7SKrzysztof Halasa
4217517c1b7SKrzysztof Halasa sca_init(card, 0);
4227517c1b7SKrzysztof Halasa
4237517c1b7SKrzysztof Halasa // COTE not set - allows better TX DMA settings
4247517c1b7SKrzysztof Halasa // sca_out(sca_in(PCR, card) | PCR_COTE, PCR, card);
4257517c1b7SKrzysztof Halasa
4267517c1b7SKrzysztof Halasa sca_out(0x10, BTCR, card);
4277517c1b7SKrzysztof Halasa
4287517c1b7SKrzysztof Halasa for (i = 0; i < card->n_ports; i++) {
4297517c1b7SKrzysztof Halasa port_t *port = &card->ports[i];
43061e0a6a2SKrzysztof Hałasa struct net_device *dev = port->netdev;
4317517c1b7SKrzysztof Halasa hdlc_device *hdlc = dev_to_hdlc(dev);
432a657c8b4SPeng Li
43361e0a6a2SKrzysztof Hałasa port->chan = i;
4347517c1b7SKrzysztof Halasa
4357517c1b7SKrzysztof Halasa spin_lock_init(&port->lock);
4367517c1b7SKrzysztof Halasa dev->irq = card->irq;
4377517c1b7SKrzysztof Halasa dev->mem_start = ramphys;
4387517c1b7SKrzysztof Halasa dev->mem_end = ramphys + ramsize - 1;
4397517c1b7SKrzysztof Halasa dev->tx_queue_len = 50;
440991990a1SKrzysztof Hałasa dev->netdev_ops = &pc300_ops;
4417517c1b7SKrzysztof Halasa hdlc->attach = sca_attach;
4427517c1b7SKrzysztof Halasa hdlc->xmit = sca_xmit;
4437517c1b7SKrzysztof Halasa port->settings.clock_type = CLOCK_EXT;
4447517c1b7SKrzysztof Halasa port->card = card;
4457517c1b7SKrzysztof Halasa if (card->type == PC300_X21)
4467517c1b7SKrzysztof Halasa port->iface = IF_IFACE_X21;
4477517c1b7SKrzysztof Halasa else
4487517c1b7SKrzysztof Halasa port->iface = IF_IFACE_V35;
4497517c1b7SKrzysztof Halasa
450abc9d91aSKrzysztof Hałasa sca_init_port(port);
4517517c1b7SKrzysztof Halasa if (register_hdlc_device(dev)) {
45212a3bfefSJoe Perches pr_err("unable to register hdlc device\n");
4537517c1b7SKrzysztof Halasa port->card = NULL;
4547517c1b7SKrzysztof Halasa pc300_pci_remove_one(pdev);
4557517c1b7SKrzysztof Halasa return -ENOBUFS;
4567517c1b7SKrzysztof Halasa }
4577517c1b7SKrzysztof Halasa
45812a3bfefSJoe Perches netdev_info(dev, "PC300 channel %d\n", port->chan);
4597517c1b7SKrzysztof Halasa }
4607517c1b7SKrzysztof Halasa return 0;
4617517c1b7SKrzysztof Halasa }
4627517c1b7SKrzysztof Halasa
4639baa3c34SBenoit Taine static const struct pci_device_id pc300_pci_tbl[] = {
4647517c1b7SKrzysztof Halasa { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_RX_1, PCI_ANY_ID,
4657517c1b7SKrzysztof Halasa PCI_ANY_ID, 0, 0, 0 },
4667517c1b7SKrzysztof Halasa { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_RX_2, PCI_ANY_ID,
4677517c1b7SKrzysztof Halasa PCI_ANY_ID, 0, 0, 0 },
4687517c1b7SKrzysztof Halasa { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_TE_1, PCI_ANY_ID,
4697517c1b7SKrzysztof Halasa PCI_ANY_ID, 0, 0, 0 },
4707517c1b7SKrzysztof Halasa { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_TE_2, PCI_ANY_ID,
4717517c1b7SKrzysztof Halasa PCI_ANY_ID, 0, 0, 0 },
4727517c1b7SKrzysztof Halasa { 0, }
4737517c1b7SKrzysztof Halasa };
4747517c1b7SKrzysztof Halasa
4757517c1b7SKrzysztof Halasa static struct pci_driver pc300_pci_driver = {
476184123dbSAl Viro .name = "PC300",
477184123dbSAl Viro .id_table = pc300_pci_tbl,
478184123dbSAl Viro .probe = pc300_pci_init_one,
479184123dbSAl Viro .remove = pc300_pci_remove_one,
4807517c1b7SKrzysztof Halasa };
4817517c1b7SKrzysztof Halasa
pc300_init_module(void)4827517c1b7SKrzysztof Halasa static int __init pc300_init_module(void)
4837517c1b7SKrzysztof Halasa {
4847517c1b7SKrzysztof Halasa if (pci_clock_freq < 1000000 || pci_clock_freq > 80000000) {
48512a3bfefSJoe Perches pr_err("Invalid PCI clock frequency\n");
4867517c1b7SKrzysztof Halasa return -EINVAL;
4877517c1b7SKrzysztof Halasa }
4887517c1b7SKrzysztof Halasa if (use_crystal_clock != 0 && use_crystal_clock != 1) {
48912a3bfefSJoe Perches pr_err("Invalid 'use_crystal_clock' value\n");
4907517c1b7SKrzysztof Halasa return -EINVAL;
4917517c1b7SKrzysztof Halasa }
4927517c1b7SKrzysztof Halasa
4937517c1b7SKrzysztof Halasa CLOCK_BASE = use_crystal_clock ? 24576000 : pci_clock_freq;
4947517c1b7SKrzysztof Halasa
49511cc3bb5SRichard Knutsson return pci_register_driver(&pc300_pci_driver);
4967517c1b7SKrzysztof Halasa }
4977517c1b7SKrzysztof Halasa
pc300_cleanup_module(void)4987517c1b7SKrzysztof Halasa static void __exit pc300_cleanup_module(void)
4997517c1b7SKrzysztof Halasa {
5007517c1b7SKrzysztof Halasa pci_unregister_driver(&pc300_pci_driver);
5017517c1b7SKrzysztof Halasa }
5027517c1b7SKrzysztof Halasa
5037517c1b7SKrzysztof Halasa MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
5047517c1b7SKrzysztof Halasa MODULE_DESCRIPTION("Cyclades PC300 serial port driver");
5057517c1b7SKrzysztof Halasa MODULE_LICENSE("GPL v2");
5067517c1b7SKrzysztof Halasa MODULE_DEVICE_TABLE(pci, pc300_pci_tbl);
5077517c1b7SKrzysztof Halasa module_param(pci_clock_freq, int, 0444);
5087517c1b7SKrzysztof Halasa MODULE_PARM_DESC(pci_clock_freq, "System PCI clock frequency in Hz");
5097517c1b7SKrzysztof Halasa module_param(use_crystal_clock, int, 0444);
5107517c1b7SKrzysztof Halasa MODULE_PARM_DESC(use_crystal_clock,
5117517c1b7SKrzysztof Halasa "Use 24.576 MHz clock instead of PCI clock");
5127517c1b7SKrzysztof Halasa module_init(pc300_init_module);
5137517c1b7SKrzysztof Halasa module_exit(pc300_cleanup_module);
514