summaryrefslogtreecommitdiffstats
path: root/drivers/tty/cyclades.c
diff options
context:
space:
mode:
authorGreg Kroah-Hartman <gregkh@suse.de>2011-02-22 16:14:56 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2011-02-22 16:14:56 -0800
commita6afd9f3e819de4795fcd356e5bfad446e4323f2 (patch)
tree3402b3981867fd4057b4eb33583b6300ae93b9a6 /drivers/tty/cyclades.c
parent44ed76b78e158d852f640d533b7acc08b91f2132 (diff)
tty: move a number of tty drivers from drivers/char/ to drivers/tty/
As planned by Arnd Bergmann, this moves the following drivers from drivers/char/ to drivers/tty/ as that's where they really belong: amiserial nozomi synclink rocket cyclades moxa mxser isicom bfin_jtag_comm Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/cyclades.c')
-rw-r--r--drivers/tty/cyclades.c4200
1 files changed, 4200 insertions, 0 deletions
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
new file mode 100644
index 00000000000..c99728f0cd9
--- /dev/null
+++ b/drivers/tty/cyclades.c
@@ -0,0 +1,4200 @@
+#undef BLOCKMOVE
+#define Z_WAKE
+#undef Z_EXT_CHARS_IN_BUFFER
+
+/*
+ * linux/drivers/char/cyclades.c
+ *
+ * This file contains the driver for the Cyclades async multiport
+ * serial boards.
+ *
+ * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
+ * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
+ *
+ * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
+ *
+ * Much of the design and some of the code came from serial.c
+ * which was copyright (C) 1991, 1992 Linus Torvalds. It was
+ * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
+ * and then fixed as suggested by Michael K. Johnson 12/12/92.
+ * Converted to pci probing and cleaned up by Jiri Slaby.
+ *
+ */
+
+#define CY_VERSION "2.6"
+
+/* If you need to install more boards than NR_CARDS, change the constant
+ in the definition below. No other change is necessary to support up to
+ eight boards. Beyond that you'll have to extend cy_isa_addresses. */
+
+#define NR_CARDS 4
+
+/*
+ If the total number of ports is larger than NR_PORTS, change this
+ constant in the definition below. No other change is necessary to
+ support more boards/ports. */
+
+#define NR_PORTS 256
+
+#define ZO_V1 0
+#define ZO_V2 1
+#define ZE_V1 2
+
+#define SERIAL_PARANOIA_CHECK
+#undef CY_DEBUG_OPEN
+#undef CY_DEBUG_THROTTLE
+#undef CY_DEBUG_OTHER
+#undef CY_DEBUG_IO
+#undef CY_DEBUG_COUNT
+#undef CY_DEBUG_DTR
+#undef CY_DEBUG_WAIT_UNTIL_SENT
+#undef CY_DEBUG_INTERRUPTS
+#undef CY_16Y_HACK
+#undef CY_ENABLE_MONITORING
+#undef CY_PCI_DEBUG
+
+/*
+ * Include section
+ */
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/cyclades.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/firmware.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static void cy_send_xchar(struct tty_struct *tty, char ch);
+
+#ifndef SERIAL_XMIT_SIZE
+#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
+#endif
+
+#define STD_COM_FLAGS (0)
+
+/* firmware stuff */
+#define ZL_MAX_BLOCKS 16
+#define DRIVER_VERSION 0x02010203
+#define RAM_SIZE 0x80000
+
+enum zblock_type {
+ ZBLOCK_PRG = 0,
+ ZBLOCK_FPGA = 1
+};
+
+struct zfile_header {
+ char name[64];
+ char date[32];
+ char aux[32];
+ u32 n_config;
+ u32 config_offset;
+ u32 n_blocks;
+ u32 block_offset;
+ u32 reserved[9];
+} __attribute__ ((packed));
+
+struct zfile_config {
+ char name[64];
+ u32 mailbox;
+ u32 function;
+ u32 n_blocks;
+ u32 block_list[ZL_MAX_BLOCKS];
+} __attribute__ ((packed));
+
+struct zfile_block {
+ u32 type;
+ u32 file_offset;
+ u32 ram_offset;
+ u32 size;
+} __attribute__ ((packed));
+
+static struct tty_driver *cy_serial_driver;
+
+#ifdef CONFIG_ISA
+/* This is the address lookup table. The driver will probe for
+ Cyclom-Y/ISA boards at all addresses in here. If you want the
+ driver to probe addresses at a different address, add it to
+ this table. If the driver is probing some other board and
+ causing problems, remove the offending address from this table.
+*/
+
+static unsigned int cy_isa_addresses[] = {
+ 0xD0000,
+ 0xD2000,
+ 0xD4000,
+ 0xD6000,
+ 0xD8000,
+ 0xDA000,
+ 0xDC000,
+ 0xDE000,
+ 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
+
+static long maddr[NR_CARDS];
+static int irq[NR_CARDS];
+
+module_param_array(maddr, long, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+
+#endif /* CONFIG_ISA */
+
+/* This is the per-card data structure containing address, irq, number of
+ channels, etc. This driver supports a maximum of NR_CARDS cards.
+*/
+static struct cyclades_card cy_card[NR_CARDS];
+
+static int cy_next_channel; /* next minor available */
+
+/*
+ * This is used to look up the divisor speeds and the timeouts
+ * We're normally limited to 15 distinct baud rates. The extra
+ * are accessed via settings in info->port.flags.
+ * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+ * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+ * HI VHI
+ * 20
+ */
+static const int baud_table[] = {
+ 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
+ 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
+ 230400, 0
+};
+
+static const char baud_co_25[] = { /* 25 MHz clock option table */
+ /* value => 00 01 02 03 04 */
+ /* divide by 8 32 128 512 2048 */
+ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
+ 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
+ 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
+ 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
+};
+
+static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
+ /* value => 00 01 02 03 04 */
+ /* divide by 8 32 128 512 2048 */
+ 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
+ 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00
+};
+
+static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
+ 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
+ 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
+ 0x21
+};
+
+static const char baud_cor3[] = { /* receive threshold */
+ 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
+ 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
+ 0x07
+};
+
+/*
+ * The Cyclades driver implements HW flow control as any serial driver.
+ * The cyclades_port structure member rflow and the vector rflow_thr
+ * allows us to take advantage of a special feature in the CD1400 to avoid
+ * data loss even when the system interrupt latency is too high. These flags
+ * are to be used only with very special applications. Setting these flags
+ * requires the use of a special cable (DTR and RTS reversed). In the new
+ * CD1400-based boards (rev. 6.00 or later), there is no need for special
+ * cables.
+ */
+
+static const char rflow_thr[] = { /* rflow threshold */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
+ 0x0a
+};
+
+/* The Cyclom-Ye has placed the sequential chips in non-sequential
+ * address order. This look-up table overcomes that problem.
+ */
+static const unsigned int cy_chip_offset[] = { 0x0000,
+ 0x0400,
+ 0x0800,
+ 0x0C00,
+ 0x0200,
+ 0x0600,
+ 0x0A00,
+ 0x0E00
+};
+
+/* PCI related definitions */
+
+#ifdef CONFIG_PCI
+static const struct pci_device_id cy_pci_dev_id[] = {
+ /* PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
+ /* PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
+ /* 4Y PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
+ /* 4Y PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
+ /* 8Y PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
+ /* 8Y PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
+ /* Z PCI < 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
+ /* Z PCI > 1Mb */
+ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
+ { } /* end of table */
+};
+MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
+#endif
+
+static void cy_start(struct tty_struct *);
+static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
+static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
+#ifdef CONFIG_ISA
+static unsigned detect_isa_irq(void __iomem *);
+#endif /* CONFIG_ISA */
+
+#ifndef CONFIG_CYZ_INTR
+static void cyz_poll(unsigned long);
+
+/* The Cyclades-Z polling cycle is defined by this variable */
+static long cyz_polling_cycle = CZ_DEF_POLL;
+
+static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
+
+#else /* CONFIG_CYZ_INTR */
+static void cyz_rx_restart(unsigned long);
+static struct timer_list cyz_rx_full_timer[NR_PORTS];
+#endif /* CONFIG_CYZ_INTR */
+
+static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
+{
+ struct cyclades_card *card = port->card;
+
+ cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
+}
+
+static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
+{
+ struct cyclades_card *card = port->card;
+
+ return readb(port->u.cyy.base_addr + (reg << card->bus_index));
+}
+
+static inline bool cy_is_Z(struct cyclades_card *card)
+{
+ return card->num_chips == (unsigned int)-1;
+}
+
+static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
+{
+ return readl(&ctl_addr->init_ctrl) & (1 << 17);
+}
+
+static inline bool cyz_fpga_loaded(struct cyclades_card *card)
+{
+ return __cyz_fpga_loaded(card->ctl_addr.p9060);
+}
+
+static inline bool cyz_is_loaded(struct cyclades_card *card)
+{
+ struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
+
+ return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
+ readl(&fw_id->signature) == ZFIRM_ID;
+}
+
+static inline int serial_paranoia_check(struct cyclades_port *info,
+ const char *name, const char *routine)
+{
+#ifdef SERIAL_PARANOIA_CHECK
+ if (!info) {
+ printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
+ "in %s\n", name, routine);
+ return 1;
+ }
+
+ if (info->magic != CYCLADES_MAGIC) {
+ printk(KERN_WARNING "cyc Warning: bad magic number for serial "
+ "struct (%s) in %s\n", name, routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+/***********************************************************/
+/********* Start of block of Cyclom-Y specific code ********/
+
+/* This routine waits up to 1000 micro-seconds for the previous
+ command to the Cirrus chip to complete and then issues the
+ new command. An error is returned if the previous command
+ didn't finish within the time limit.
+
+ This function is only called from inside spinlock-protected code.
+ */
+static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
+{
+ void __iomem *ccr = base_addr + (CyCCR << index);
+ unsigned int i;
+
+ /* Check to see that the previous command has completed */
+ for (i = 0; i < 100; i++) {
+ if (readb(ccr) == 0)
+ break;
+ udelay(10L);
+ }
+ /* if the CCR never cleared, the previous command
+ didn't finish within the "reasonable time" */
+ if (i == 100)
+ return -1;
+
+ /* Issue the new command */
+ cy_writeb(ccr, cmd);
+
+ return 0;
+}
+
+static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
+{
+ return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
+ port->card->bus_index);
+}
+
+#ifdef CONFIG_ISA
+/* ISA interrupt detection code */
+static unsigned detect_isa_irq(void __iomem *address)
+{
+ int irq;
+ unsigned long irqs, flags;
+ int save_xir, save_car;
+ int index = 0; /* IRQ probing is only for ISA */
+
+ /* forget possible initially masked and pending IRQ */
+ irq = probe_irq_off(probe_irq_on());
+
+ /* Clear interrupts on the board first */
+ cy_writeb(address + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+
+ irqs = probe_irq_on();
+ /* Wait ... */
+ msleep(5);
+
+ /* Enable the Tx interrupts on the CD1400 */
+ local_irq_save(flags);
+ cy_writeb(address + (CyCAR << index), 0);
+ __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
+
+ cy_writeb(address + (CyCAR << index), 0);
+ cy_writeb(address + (CySRER << index),
+ readb(address + (CySRER << index)) | CyTxRdy);
+ local_irq_restore(flags);
+
+ /* Wait ... */
+ msleep(5);
+
+ /* Check which interrupt is in use */
+ irq = probe_irq_off(irqs);
+
+ /* Clean up */
+ save_xir = (u_char) readb(address + (CyTIR << index));
+ save_car = readb(address + (CyCAR << index));
+ cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
+ cy_writeb(address + (CySRER << index),
+ readb(address + (CySRER << index)) & ~CyTxRdy);
+ cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
+ cy_writeb(address + (CyCAR << index), (save_car));
+ cy_writeb(address + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+
+ return (irq > 0) ? irq : 0;
+}
+#endif /* CONFIG_ISA */
+
+static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
+ void __iomem *base_addr)
+{
+ struct cyclades_port *info;
+ struct tty_struct *tty;
+ int len, index = cinfo->bus_index;
+ u8 ivr, save_xir, channel, save_car, data, char_count;
+
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
+#endif
+ /* determine the channel & change to that context */
+ save_xir = readb(base_addr + (CyRIR << index));
+ channel = save_xir & CyIRChannel;
+ info = &cinfo->ports[channel + chip * 4];
+ save_car = cyy_readb(info, CyCAR);
+ cyy_writeb(info, CyCAR, save_xir);
+ ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
+
+ tty = tty_port_tty_get(&info->port);
+ /* if there is nowhere to put the data, discard it */
+ if (tty == NULL) {
+ if (ivr == CyIVRRxEx) { /* exception */
+ data = cyy_readb(info, CyRDSR);
+ } else { /* normal character reception */
+ char_count = cyy_readb(info, CyRDCR);
+ while (char_count--)
+ data = cyy_readb(info, CyRDSR);
+ }
+ goto end;
+ }
+ /* there is an open port for this data */
+ if (ivr == CyIVRRxEx) { /* exception */
+ data = cyy_readb(info, CyRDSR);
+
+ /* For statistics only */
+ if (data & CyBREAK)
+ info->icount.brk++;
+ else if (data & CyFRAME)
+ info->icount.frame++;
+ else if (data & CyPARITY)
+ info->icount.parity++;
+ else if (data & CyOVERRUN)
+ info->icount.overrun++;
+
+ if (data & info->ignore_status_mask) {
+ info->icount.rx++;
+ tty_kref_put(tty);
+ return;
+ }
+ if (tty_buffer_request_room(tty, 1)) {
+ if (data & info->read_status_mask) {
+ if (data & CyBREAK) {
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_BREAK);
+ info->icount.rx++;
+ if (info->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ } else if (data & CyFRAME) {
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_FRAME);
+ info->icount.rx++;
+ info->idle_stats.frame_errs++;
+ } else if (data & CyPARITY) {
+ /* Pieces of seven... */
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_PARITY);
+ info->icount.rx++;
+ info->idle_stats.parity_errs++;
+ } else if (data & CyOVERRUN) {
+ tty_insert_flip_char(tty, 0,
+ TTY_OVERRUN);
+ info->icount.rx++;
+ /* If the flip buffer itself is
+ overflowing, we still lose
+ the next incoming character.
+ */
+ tty_insert_flip_char(tty,
+ cyy_readb(info, CyRDSR),
+ TTY_FRAME);
+ info->icount.rx++;
+ info->idle_stats.overruns++;
+ /* These two conditions may imply */
+ /* a normal read should be done. */
+ /* } else if(data & CyTIMEOUT) { */
+ /* } else if(data & CySPECHAR) { */
+ } else {
+ tty_insert_flip_char(tty, 0,
+ TTY_NORMAL);
+ info->icount.rx++;
+ }
+ } else {
+ tty_insert_flip_char(tty, 0, TTY_NORMAL);
+ info->icount.rx++;
+ }
+ } else {
+ /* there was a software buffer overrun and nothing
+ * could be done about it!!! */
+ info->icount.buf_overrun++;
+ info->idle_stats.overruns++;
+ }
+ } else { /* normal character reception */
+ /* load # chars available from the chip */
+ char_count = cyy_readb(info, CyRDCR);
+
+#ifdef CY_ENABLE_MONITORING
+ ++info->mon.int_count;
+ info->mon.char_count += char_count;
+ if (char_count > info->mon.char_max)
+ info->mon.char_max = char_count;
+ info->mon.char_last = char_count;
+#endif
+ len = tty_buffer_request_room(tty, char_count);
+ while (len--) {
+ data = cyy_readb(info, CyRDSR);
+ tty_insert_flip_char(tty, data, TTY_NORMAL);
+ info->idle_stats.recv_bytes++;
+ info->icount.rx++;
+#ifdef CY_16Y_HACK
+ udelay(10L);
+#endif
+ }
+ info->idle_stats.recv_idle = jiffies;
+ }
+ tty_schedule_flip(tty);
+ tty_kref_put(tty);
+end:
+ /* end of service */
+ cyy_writeb(info, CyRIR, save_xir & 0x3f);
+ cyy_writeb(info, CyCAR, save_car);
+}
+
+static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
+ void __iomem *base_addr)
+{
+ struct cyclades_port *info;
+ struct tty_struct *tty;
+ int char_count, index = cinfo->bus_index;
+ u8 save_xir, channel, save_car, outch;
+
+ /* Since we only get here when the transmit buffer
+ is empty, we know we can always stuff a dozen
+ characters. */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
+#endif
+
+ /* determine the channel & change to that context */
+ save_xir = readb(base_addr + (CyTIR << index));
+ channel = save_xir & CyIRChannel;
+ save_car = readb(base_addr + (CyCAR << index));
+ cy_writeb(base_addr + (CyCAR << index), save_xir);
+
+ info = &cinfo->ports[channel + chip * 4];
+ tty = tty_port_tty_get(&info->port);
+ if (tty == NULL) {
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
+ goto end;
+ }
+
+ /* load the on-chip space for outbound data */
+ char_count = info->xmit_fifo_size;
+
+ if (info->x_char) { /* send special char */
+ outch = info->x_char;
+ cyy_writeb(info, CyTDR, outch);
+ char_count--;
+ info->icount.tx++;
+ info->x_char = 0;
+ }
+
+ if (info->breakon || info->breakoff) {
+ if (info->breakon) {
+ cyy_writeb(info, CyTDR, 0);
+ cyy_writeb(info, CyTDR, 0x81);
+ info->breakon = 0;
+ char_count -= 2;
+ }
+ if (info->breakoff) {
+ cyy_writeb(info, CyTDR, 0);
+ cyy_writeb(info, CyTDR, 0x83);
+ info->breakoff = 0;
+ char_count -= 2;
+ }
+ }
+
+ while (char_count-- > 0) {
+ if (!info->xmit_cnt) {
+ if (cyy_readb(info, CySRER) & CyTxMpty) {
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxMpty);
+ } else {
+ cyy_writeb(info, CySRER, CyTxMpty |
+ (cyy_readb(info, CySRER) & ~CyTxRdy));
+ }
+ goto done;
+ }
+ if (info->port.xmit_buf == NULL) {
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxRdy);
+ goto done;
+ }
+ if (tty->stopped || tty->hw_stopped) {
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxRdy);
+ goto done;
+ }
+ /* Because the Embedded Transmit Commands have been enabled,
+ * we must check to see if the escape character, NULL, is being
+ * sent. If it is, we must ensure that there is room for it to
+ * be doubled in the output stream. Therefore we no longer
+ * advance the pointer when the character is fetched, but
+ * rather wait until after the check for a NULL output
+ * character. This is necessary because there may not be room
+ * for the two chars needed to send a NULL.)
+ */
+ outch = info->port.xmit_buf[info->xmit_tail];
+ if (outch) {
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1) &
+ (SERIAL_XMIT_SIZE - 1);
+ cyy_writeb(info, CyTDR, outch);
+ info->icount.tx++;
+ } else {
+ if (char_count > 1) {
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1) &
+ (SERIAL_XMIT_SIZE - 1);
+ cyy_writeb(info, CyTDR, outch);
+ cyy_writeb(info, CyTDR, 0);
+ info->icount.tx++;
+ char_count--;
+ }
+ }
+ }
+
+done:
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+end:
+ /* end of service */
+ cyy_writeb(info, CyTIR, save_xir & 0x3f);
+ cyy_writeb(info, CyCAR, save_car);
+}
+
+static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
+ void __iomem *base_addr)
+{
+ struct cyclades_port *info;
+ struct tty_struct *tty;
+ int index = cinfo->bus_index;
+ u8 save_xir, channel, save_car, mdm_change, mdm_status;
+
+ /* determine the channel & change to that context */
+ save_xir = readb(base_addr + (CyMIR << index));
+ channel = save_xir & CyIRChannel;
+ info = &cinfo->ports[channel + chip * 4];
+ save_car = cyy_readb(info, CyCAR);
+ cyy_writeb(info, CyCAR, save_xir);
+
+ mdm_change = cyy_readb(info, CyMISR);
+ mdm_status = cyy_readb(info, CyMSVR1);
+
+ tty = tty_port_tty_get(&info->port);
+ if (!tty)
+ goto end;
+
+ if (mdm_change & CyANY_DELTA) {
+ /* For statistics only */
+ if (mdm_change & CyDCD)
+ info->icount.dcd++;
+ if (mdm_change & CyCTS)
+ info->icount.cts++;
+ if (mdm_change & CyDSR)
+ info->icount.dsr++;
+ if (mdm_change & CyRI)
+ info->icount.rng++;
+
+ wake_up_interruptible(&info->port.delta_msr_wait);
+ }
+
+ if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
+ if (mdm_status & CyDCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else
+ tty_hangup(tty);
+ }
+ if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
+ if (tty->hw_stopped) {
+ if (mdm_status & CyCTS) {
+ /* cy_start isn't used
+ because... !!! */
+ tty->hw_stopped = 0;
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) | CyTxRdy);
+ tty_wakeup(tty);
+ }
+ } else {
+ if (!(mdm_status & CyCTS)) {
+ /* cy_stop isn't used
+ because ... !!! */
+ tty->hw_stopped = 1;
+ cyy_writeb(info, CySRER,
+ cyy_readb(info, CySRER) & ~CyTxRdy);
+ }
+ }
+ }
+/* if (mdm_change & CyDSR) {
+ }
+ if (mdm_change & CyRI) {
+ }*/
+ tty_kref_put(tty);
+end:
+ /* end of service */
+ cyy_writeb(info, CyMIR, save_xir & 0x3f);
+ cyy_writeb(info, CyCAR, save_car);
+}
+
+/* The real interrupt service routine is called
+ whenever the card wants its hand held--chars
+ received, out buffer empty, modem change, etc.
+ */
+static irqreturn_t cyy_interrupt(int irq, void *dev_id)
+{
+ int status;
+ struct cyclades_card *cinfo = dev_id;
+ void __iomem *base_addr, *card_base_addr;
+ unsigned int chip, too_many, had_work;
+ int index;
+
+ if (unlikely(cinfo == NULL)) {
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
+ irq);
+#endif
+ return IRQ_NONE; /* spurious interrupt */
+ }
+
+ card_base_addr = cinfo->base_addr;
+ index = cinfo->bus_index;
+
+ /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
+ if (unlikely(card_base_addr == NULL))
+ return IRQ_HANDLED;
+
+ /* This loop checks all chips in the card. Make a note whenever
+ _any_ chip had some work to do, as this is considered an
+ indication that there will be more to do. Only when no chip
+ has any work does this outermost loop exit.
+ */
+ do {
+ had_work = 0;
+ for (chip = 0; chip < cinfo->num_chips; chip++) {
+ base_addr = cinfo->base_addr +
+ (cy_chip_offset[chip] << index);
+ too_many = 0;
+ while ((status = readb(base_addr +
+ (CySVRR << index))) != 0x00) {
+ had_work++;
+ /* The purpose of the following test is to ensure that
+ no chip can monopolize the driver. This forces the
+ chips to be checked in a round-robin fashion (after
+ draining each of a bunch (1000) of characters).
+ */
+ if (1000 < too_many++)
+ break;
+ spin_lock(&cinfo->card_lock);
+ if (status & CySRReceive) /* rx intr */
+ cyy_chip_rx(cinfo, chip, base_addr);
+ if (status & CySRTransmit) /* tx intr */
+ cyy_chip_tx(cinfo, chip, base_addr);
+ if (status & CySRModem) /* modem intr */
+ cyy_chip_modem(cinfo, chip, base_addr);
+ spin_unlock(&cinfo->card_lock);
+ }
+ }
+ } while (had_work);
+
+ /* clear interrupts */
+ spin_lock(&cinfo->card_lock);
+ cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+ spin_unlock(&cinfo->card_lock);
+ return IRQ_HANDLED;
+} /* cyy_interrupt */
+
+static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
+ unsigned int clear)
+{
+ struct cyclades_card *card = info->card;
+ int channel = info->line - card->first_line;
+ u32 rts, dtr, msvrr, msvrd;
+
+ channel &= 0x03;
+
+ if (info->rtsdtr_inv) {
+ msvrr = CyMSVR2;
+ msvrd = CyMSVR1;
+ rts = CyDTR;
+ dtr = CyRTS;
+ } else {
+ msvrr = CyMSVR1;
+ msvrd = CyMSVR2;
+ rts = CyRTS;
+ dtr = CyDTR;
+ }
+ if (set & TIOCM_RTS) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrr, rts);
+ }
+ if (clear & TIOCM_RTS) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrr, ~rts);
+ }
+ if (set & TIOCM_DTR) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrd, dtr);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
+ printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
+ cyy_readb(info, CyMSVR1),
+ cyy_readb(info, CyMSVR2));
+#endif
+ }
+ if (clear & TIOCM_DTR) {
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, msvrd, ~dtr);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
+ printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
+ cyy_readb(info, CyMSVR1),
+ cyy_readb(info, CyMSVR2));
+#endif
+ }
+}
+
+/***********************************************************/
+/********* End of block of Cyclom-Y specific code **********/
+/******** Start of block of Cyclades-Z specific code *******/
+/***********************************************************/
+
+static int
+cyz_fetch_msg(struct cyclades_card *cinfo,
+ __u32 *channel, __u8 *cmd, __u32 *param)
+{
+ struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+ unsigned long loc_doorbell;
+
+ loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
+ if (loc_doorbell) {
+ *cmd = (char)(0xff & loc_doorbell);
+ *channel = readl(&board_ctrl->fwcmd_channel);
+ *param = (__u32) readl(&board_ctrl->fwcmd_param);
+ cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
+ return 1;
+ }
+ return 0;
+} /* cyz_fetch_msg */
+
+static int
+cyz_issue_cmd(struct cyclades_card *cinfo,
+ __u32 channel, __u8 cmd, __u32 param)
+{
+ struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+ __u32 __iomem *pci_doorbell;
+ unsigned int index;
+
+ if (!cyz_is_loaded(cinfo))
+ return -1;
+
+ index = 0;
+ pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
+ while ((readl(pci_doorbell) & 0xff) != 0) {
+ if (index++ == 1000)
+ return (int)(readl(pci_doorbell) & 0xff);
+ udelay(50L);
+ }
+ cy_writel(&board_ctrl->hcmd_channel, channel);
+ cy_writel(&board_ctrl->hcmd_param, param);
+ cy_writel(pci_doorbell, (long)cmd);
+
+ return 0;
+} /* cyz_issue_cmd */
+
+static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+ struct cyclades_card *cinfo = info->card;
+ unsigned int char_count;
+ int len;
+#ifdef BLOCKMOVE
+ unsigned char *buf;
+#else
+ char data;
+#endif
+ __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
+
+ rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
+ rx_put = readl(&buf_ctrl->rx_put);
+ rx_bufsize = readl(&buf_ctrl->rx_bufsize);
+ rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
+ if (rx_put >= rx_get)
+ char_count = rx_put - rx_get;
+ else
+ char_count = rx_put - rx_get + rx_bufsize;
+
+ if (char_count) {
+#ifdef CY_ENABLE_MONITORING
+ info->mon.int_count++;
+ info->mon.char_count += char_count;
+ if (char_count > info->mon.char_max)
+ info->mon.char_max = char_count;
+ info->mon.char_last = char_count;
+#endif
+ if (tty == NULL) {
+ /* flush received characters */
+ new_rx_get = (new_rx_get + char_count) &
+ (rx_bufsize - 1);
+ info->rflush_count++;
+ } else {
+#ifdef BLOCKMOVE
+ /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
+ for performance, but because of buffer boundaries, there
+ may be several steps to the operation */
+ while (1) {
+ len = tty_prepare_flip_string(tty, &buf,
+ char_count);
+ if (!len)
+ break;
+
+ len = min_t(unsigned int, min(len, char_count),
+ rx_bufsize - new_rx_get);
+
+ memcpy_fromio(buf, cinfo->base_addr +
+ rx_bufaddr + new_rx_get, len);
+
+ new_rx_get = (new_rx_get + len) &
+ (rx_bufsize - 1);
+ char_count -= len;
+ info->icount.rx += len;
+ info->idle_stats.recv_bytes += len;
+ }
+#else
+ len = tty_buffer_request_room(tty, char_count);
+ while (len--) {
+ data = readb(cinfo->base_addr + rx_bufaddr +
+ new_rx_get);
+ new_rx_get = (new_rx_get + 1) &
+ (rx_bufsize - 1);
+ tty_insert_flip_char(tty, data, TTY_NORMAL);
+ info->idle_stats.recv_bytes++;
+ info->icount.rx++;
+ }
+#endif
+#ifdef CONFIG_CYZ_INTR
+ /* Recalculate the number of chars in the RX buffer and issue
+ a cmd in case it's higher than the RX high water mark */
+ rx_put = readl(&buf_ctrl->rx_put);
+ if (rx_put >= rx_get)
+ char_count = rx_put - rx_get;
+ else
+ char_count = rx_put - rx_get + rx_bufsize;
+ if (char_count >= readl(&buf_ctrl->rx_threshold) &&
+ !timer_pending(&cyz_rx_full_timer[
+ info->line]))
+ mod_timer(&cyz_rx_full_timer[info->line],
+ jiffies + 1);
+#endif
+ info->idle_stats.recv_idle = jiffies;
+ tty_schedule_flip(tty);
+ }
+ /* Update rx_get */
+ cy_writel(&buf_ctrl->rx_get, new_rx_get);
+ }
+}
+
+static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+ struct cyclades_card *cinfo = info->card;
+ u8 data;
+ unsigned int char_count;
+#ifdef BLOCKMOVE
+ int small_count;
+#endif
+ __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
+
+ if (info->xmit_cnt <= 0) /* Nothing to transmit */
+ return;
+
+ tx_get = readl(&buf_ctrl->tx_get);
+ tx_put = readl(&buf_ctrl->tx_put);
+ tx_bufsize = readl(&buf_ctrl->tx_bufsize);
+ tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
+ if (tx_put >= tx_get)
+ char_count = tx_get - tx_put - 1 + tx_bufsize;
+ else
+ char_count = tx_get - tx_put - 1;
+
+ if (char_count) {
+
+ if (tty == NULL)
+ goto ztxdone;
+
+ if (info->x_char) { /* send special char */
+ data = info->x_char;
+
+ cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
+ tx_put = (tx_put + 1) & (tx_bufsize - 1);
+ info->x_char = 0;
+ char_count--;
+ info->icount.tx++;
+ }
+#ifdef BLOCKMOVE
+ while (0 < (small_count = min_t(unsigned int,
+ tx_bufsize - tx_put, min_t(unsigned int,
+ (SERIAL_XMIT_SIZE - info->xmit_tail),
+ min_t(unsigned int, info->xmit_cnt,
+ char_count))))) {
+
+ memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
+ tx_put),
+ &info->port.xmit_buf[info->xmit_tail],
+ small_count);
+
+ tx_put = (tx_put + small_count) & (tx_bufsize - 1);
+ char_count -= small_count;
+ info->icount.tx += small_count;
+ info->xmit_cnt -= small_count;
+ info->xmit_tail = (info->xmit_tail + small_count) &
+ (SERIAL_XMIT_SIZE - 1);
+ }
+#else
+ while (info->xmit_cnt && char_count) {
+ data = info->port.xmit_buf[info->xmit_tail];
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1) &
+ (SERIAL_XMIT_SIZE - 1);
+
+ cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
+ tx_put = (tx_put + 1) & (tx_bufsize - 1);
+ char_count--;
+ info->icount.tx++;
+ }
+#endif
+ tty_wakeup(tty);
+ztxdone:
+ /* Update tx_put */
+ cy_writel(&buf_ctrl->tx_put, tx_put);
+ }
+}
+
+static void cyz_handle_cmd(struct cyclades_card *cinfo)
+{
+ struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+ struct tty_struct *tty;
+ struct cyclades_port *info;
+ __u32 channel, param, fw_ver;
+ __u8 cmd;
+ int special_count;
+ int delta_count;
+
+ fw_ver = readl(&board_ctrl->fw_version);
+
+ while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
+ special_count = 0;
+ delta_count = 0;
+ info = &cinfo->ports[channel];
+ tty = tty_port_tty_get(&info->port);
+ if (tty == NULL)
+ continue;
+
+ switch (cmd) {
+ case C_CM_PR_ERROR:
+ tty_insert_flip_char(tty, 0, TTY_PARITY);
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_FR_ERROR:
+ tty_insert_flip_char(tty, 0, TTY_FRAME);
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_RXBRK:
+ tty_insert_flip_char(tty, 0, TTY_BREAK);
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_MDCD:
+ info->icount.dcd++;
+ delta_count++;
+ if (info->port.flags & ASYNC_CHECK_CD) {
+ u32 dcd = fw_ver > 241 ? param :
+ readl(&info->u.cyz.ch_ctrl->rs_status);
+ if (dcd & C_RS_DCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else
+ tty_hangup(tty);
+ }
+ break;
+ case C_CM_MCTS:
+ info->icount.cts++;
+ delta_count++;
+ break;
+ case C_CM_MRI:
+ info->icount.rng++;
+ delta_count++;
+ break;
+ case C_CM_MDSR:
+ info->icount.dsr++;
+ delta_count++;
+ break;
+#ifdef Z_WAKE
+ case C_CM_IOCTLW:
+ complete(&info->shutdown_wait);
+ break;
+#endif
+#ifdef CONFIG_CYZ_INTR
+ case C_CM_RXHIWM:
+ case C_CM_RXNNDT:
+ case C_CM_INTBACK2:
+ /* Reception Interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
+ "port %ld\n", info->card, channel);
+#endif
+ cyz_handle_rx(info, tty);
+ break;
+ case C_CM_TXBEMPTY:
+ case C_CM_TXLOWWM:
+ case C_CM_INTBACK:
+ /* Transmission Interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
+ "port %ld\n", info->card, channel);
+#endif
+ cyz_handle_tx(info, tty);
+ break;
+#endif /* CONFIG_CYZ_INTR */
+ case C_CM_FATAL:
+ /* should do something with this !!! */
+ break;
+ default:
+ break;
+ }
+ if (delta_count)
+ wake_up_interruptible(&info->port.delta_msr_wait);
+ if (special_count)
+ tty_schedule_flip(tty);
+ tty_kref_put(tty);
+ }
+}
+
+#ifdef CONFIG_CYZ_INTR
+static irqreturn_t cyz_interrupt(int irq, void *dev_id)
+{
+ struct cyclades_card *cinfo = dev_id;
+
+ if (unlikely(!cyz_is_loaded(cinfo))) {
+#ifdef CY_DEBUG_INTERRUPTS
+ printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
+ "(IRQ%d).\n", irq);
+#endif
+ return IRQ_NONE;
+ }
+
+ /* Handle the interrupts */
+ cyz_handle_cmd(cinfo);
+
+ return IRQ_HANDLED;
+} /* cyz_interrupt */
+
+static void cyz_rx_restart(unsigned long arg)
+{
+ struct cyclades_port *info = (struct cyclades_port *)arg;
+ struct cyclades_card *card = info->card;
+ int retval;
+ __u32 channel = info->line - card->first_line;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+#else /* CONFIG_CYZ_INTR */
+
+static void cyz_poll(unsigned long arg)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info;
+ unsigned long expires = jiffies + HZ;
+ unsigned int port, card;
+
+ for (card = 0; card < NR_CARDS; card++) {
+ cinfo = &cy_card[card];
+
+ if (!cy_is_Z(cinfo))
+ continue;
+ if (!cyz_is_loaded(cinfo))
+ continue;
+
+ /* Skip first polling cycle to avoid racing conditions with the FW */
+ if (!cinfo->intr_enabled) {
+ cinfo->intr_enabled = 1;
+ continue;
+ }
+
+ cyz_handle_cmd(cinfo);
+
+ for (port = 0; port < cinfo->nports; port++) {
+ struct tty_struct *tty;
+
+ info = &cinfo->ports[port];
+ tty = tty_port_tty_get(&info->port);
+ /* OK to pass NULL to the handle functions below.
+ They need to drop the data in that case. */
+
+ if (!info->throttle)
+ cyz_handle_rx(info, tty);
+ cyz_handle_tx(info, tty);
+ tty_kref_put(tty);
+ }
+ /* poll every 'cyz_polling_cycle' period */
+ expires = jiffies + cyz_polling_cycle;
+ }
+ mod_timer(&cyz_timerlist, expires);
+} /* cyz_poll */
+
+#endif /* CONFIG_CYZ_INTR */
+
+/********** End of block of Cyclades-Z specific code *********/
+/***********************************************************/
+
+/* This is called whenever a port becomes active;
+ interrupts are enabled and DTR & RTS are turned on.
+ */
+static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct cyclades_card *card;
+ unsigned long flags;
+ int retval = 0;
+ int channel;
+ unsigned long page;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ page = get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ if (info->port.flags & ASYNC_INITIALIZED)
+ goto errout;
+
+ if (!info->type) {
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ goto errout;
+ }
+
+ if (info->port.xmit_buf)
+ free_page(page);
+ else
+ info->port.xmit_buf = (unsigned char *)page;
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ cy_set_line_char(info, tty);
+
+ if (!cy_is_Z(card)) {
+ channel &= 0x03;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ cyy_writeb(info, CyCAR, channel);
+
+ cyy_writeb(info, CyRTPR,
+ (info->default_timeout ? info->default_timeout : 0x02));
+ /* 10ms rx timeout */
+
+ cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
+
+ cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
+
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
+ } else {
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+
+ if (!cyz_is_loaded(card))
+ return -ENODEV;
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
+ "base_addr %p\n", card, channel, card->base_addr);
+#endif
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
+#ifdef Z_WAKE
+#ifdef CONFIG_CYZ_INTR
+ cy_writel(&ch_ctrl->intr_enable,
+ C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
+ C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
+#else
+ cy_writel(&ch_ctrl->intr_enable,
+ C_IN_IOCTLW | C_IN_MDCD);
+#endif /* CONFIG_CYZ_INTR */
+#else
+#ifdef CONFIG_CYZ_INTR
+ cy_writel(&ch_ctrl->intr_enable,
+ C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
+ C_IN_RXNNDT | C_IN_MDCD);
+#else
+ cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
+#endif /* CONFIG_CYZ_INTR */
+#endif /* Z_WAKE */
+
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
+ "%x\n", info->line, retval);
+ }
+
+ /* Flush RX buffers before raising DTR and RTS */
+ retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
+ "%x\n", info->line, retval);
+ }
+
+ /* set timeout !!! */
+ /* set RTS and DTR !!! */
+ tty_port_raise_dtr_rts(&info->port);
+
+ /* enable send, recv, modem !!! */
+ }
+
+ info->port.flags |= ASYNC_INITIALIZED;
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ info->breakon = info->breakoff = 0;
+ memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
+ info->idle_stats.in_use =
+ info->idle_stats.recv_idle =
+ info->idle_stats.xmit_idle = jiffies;
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc startup done\n");
+#endif
+ return 0;
+
+errout:
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ free_page(page);
+ return retval;
+} /* startup */
+
+static void start_xmit(struct cyclades_port *info)
+{
+ struct cyclades_card *card = info->card;
+ unsigned long flags;
+ int channel = info->line - card->first_line;
+
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+#ifdef CONFIG_CYZ_INTR
+ int retval;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
+ "%x\n", info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+#else /* CONFIG_CYZ_INTR */
+ /* Don't have to do anything at this time */
+#endif /* CONFIG_CYZ_INTR */
+ }
+} /* start_xmit */
+
+/*
+ * This routine shuts down a serial port; interrupts are disabled,
+ * and DTR is dropped if the hangup on close termio flag is on.
+ */
+static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct cyclades_card *card;
+ unsigned long flags;
+ int channel;
+
+ if (!(info->port.flags & ASYNC_INITIALIZED))
+ return;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ /* Clear delta_msr_wait queue to avoid mem leaks. */
+ wake_up_interruptible(&info->port.delta_msr_wait);
+
+ if (info->port.xmit_buf) {
+ unsigned char *temp;
+ temp = info->port.xmit_buf;
+ info->port.xmit_buf = NULL;
+ free_page((unsigned long)temp);
+ }
+ if (tty->termios->c_cflag & HUPCL)
+ cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
+
+ cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
+ /* it may be appropriate to clear _XMIT at
+ some later date (after testing)!!! */
+
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ info->port.flags &= ~ASYNC_INITIALIZED;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
+ "base_addr %p\n", card, channel, card->base_addr);
+#endif
+
+ if (!cyz_is_loaded(card))
+ return;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ if (info->port.xmit_buf) {
+ unsigned char *temp;
+ temp = info->port.xmit_buf;
+ info->port.xmit_buf = NULL;
+ free_page((unsigned long)temp);
+ }
+
+ if (tty->termios->c_cflag & HUPCL)
+ tty_port_lower_dtr_rts(&info->port);
+
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ info->port.flags &= ~ASYNC_INITIALIZED;
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc shutdown done\n");
+#endif
+} /* shutdown */
+
+/*
+ * ------------------------------------------------------------
+ * cy_open() and friends
+ * ------------------------------------------------------------
+ */
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * performs the serial-specific initialization for the tty structure.
+ */
+static int cy_open(struct tty_struct *tty, struct file *filp)
+{
+ struct cyclades_port *info;
+ unsigned int i, line;
+ int retval;
+
+ line = tty->index;
+ if (tty->index < 0 || NR_PORTS <= line)
+ return -ENODEV;
+
+ for (i = 0; i < NR_CARDS; i++)
+ if (line < cy_card[i].first_line + cy_card[i].nports &&
+ line >= cy_card[i].first_line)
+ break;
+ if (i >= NR_CARDS)
+ return -ENODEV;
+ info = &cy_card[i].ports[line - cy_card[i].first_line];
+ if (info->line < 0)
+ return -ENODEV;
+
+ /* If the card's firmware hasn't been loaded,
+ treat it as absent from the system. This
+ will make the user pay attention.
+ */
+ if (cy_is_Z(info->card)) {
+ struct cyclades_card *cinfo = info->card;
+ struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
+
+ if (!cyz_is_loaded(cinfo)) {
+ if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
+ readl(&firm_id->signature) ==
+ ZFIRM_HLT) {
+ printk(KERN_ERR "cyc:Cyclades-Z Error: you "
+ "need an external power supply for "
+ "this number of ports.\nFirmware "
+ "halted.\n");
+ } else {
+ printk(KERN_ERR "cyc:Cyclades-Z firmware not "
+ "yet loaded\n");
+ }
+ return -ENODEV;
+ }
+#ifdef CONFIG_CYZ_INTR
+ else {
+ /* In case this Z board is operating in interrupt mode, its
+ interrupts should be enabled as soon as the first open
+ happens to one of its ports. */
+ if (!cinfo->intr_enabled) {
+ u16 intr;
+
+ /* Enable interrupts on the PLX chip */
+ intr = readw(&cinfo->ctl_addr.p9060->
+ intr_ctrl_stat) | 0x0900;
+ cy_writew(&cinfo->ctl_addr.p9060->
+ intr_ctrl_stat, intr);
+ /* Enable interrupts on the FW */
+ retval = cyz_issue_cmd(cinfo, 0,
+ C_CM_IRQ_ENBL, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:IRQ enable retval "
+ "was %x\n", retval);
+ }
+ cinfo->intr_enabled = 1;
+ }
+ }
+#endif /* CONFIG_CYZ_INTR */
+ /* Make sure this Z port really exists in hardware */
+ if (info->line > (cinfo->first_line + cinfo->nports - 1))
+ return -ENODEV;
+ }
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
+#endif
+ tty->driver_data = info;
+ if (serial_paranoia_check(info, tty->name, "cy_open"))
+ return -ENODEV;
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
+ info->port.count);
+#endif
+ info->port.count++;
+#ifdef CY_DEBUG_COUNT
+ printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
+ current->pid, info->port.count);
+#endif
+
+ /*
+ * If the port is the middle of closing, bail out now
+ */
+ if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
+ wait_event_interruptible_tty(info->port.close_wait,
+ !(info->port.flags & ASYNC_CLOSING));
+ return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
+ }
+
+ /*
+ * Start up serial port
+ */
+ retval = cy_startup(info, tty);
+ if (retval)
+ return retval;
+
+ retval = tty_port_block_til_ready(&info->port, tty, filp);
+ if (retval) {
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
+ "with %d\n", retval);
+#endif
+ return retval;
+ }
+
+ info->throttle = 0;
+ tty_port_tty_set(&info->port, tty);
+
+#ifdef CY_DEBUG_OPEN
+ printk(KERN_DEBUG "cyc:cy_open done\n");
+#endif
+ return 0;
+} /* cy_open */
+
+/*
+ * cy_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct cyclades_card *card;
+ struct cyclades_port *info = tty->driver_data;
+ unsigned long orig_jiffies;
+ int char_time;
+
+ if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
+ return;
+
+ if (info->xmit_fifo_size == 0)
+ return; /* Just in case.... */
+
+ orig_jiffies = jiffies;
+ /*
+ * Set the check interval to be 1/5 of the estimated time to
+ * send a single character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ *
+ * Note: we have to use pretty tight timings here to satisfy
+ * the NIST-PCTS.
+ */
+ char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
+ char_time = char_time / 5;
+ if (char_time <= 0)
+ char_time = 1;
+ if (timeout < 0)
+ timeout = 0;
+ if (timeout)
+ char_time = min(char_time, timeout);
+ /*
+ * If the transmitter hasn't cleared in twice the approximate
+ * amount of time to send the entire FIFO, it probably won't
+ * ever clear. This assumes the UART isn't doing flow
+ * control, which is currently the case. Hence, if it ever
+ * takes longer than info->timeout, this is probably due to a
+ * UART bug of some kind. So, we clamp the timeout parameter at
+ * 2*info->timeout.
+ */
+ if (!timeout || timeout > 2 * info->timeout)
+ timeout = 2 * info->timeout;
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
+ timeout, char_time, jiffies);
+#endif
+ card = info->card;
+ if (!cy_is_Z(card)) {
+ while (cyy_readb(info, CySRER) & CyTxRdy) {
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
+#endif
+ if (msleep_interruptible(jiffies_to_msecs(char_time)))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies +
+ timeout))
+ break;
+ }
+ }
+ /* Run one more char cycle */
+ msleep_interruptible(jiffies_to_msecs(char_time * 5));
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
+#endif
+}
+
+static void cy_flush_buffer(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ int channel, retval;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
+ return;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
+ buffers as well */
+ spin_lock_irqsave(&card->card_lock, flags);
+ retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+ tty_wakeup(tty);
+} /* cy_flush_buffer */
+
+
+static void cy_do_close(struct tty_port *port)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *card;
+ unsigned long flags;
+ int channel;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ if (!cy_is_Z(card)) {
+ /* Stop accepting input */
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
+ if (info->port.flags & ASYNC_INITIALIZED) {
+ /* Waiting for on-board buffers to be empty before
+ closing the port */
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ cy_wait_until_sent(port->tty, info->timeout);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+ } else {
+#ifdef Z_WAKE
+ /* Waiting for on-board buffers to be empty before closing
+ the port */
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ int retval;
+
+ if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
+ if (retval != 0) {
+ printk(KERN_DEBUG "cyc:cy_close retval on "
+ "ttyC%d was %x\n", info->line, retval);
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ wait_for_completion_interruptible(&info->shutdown_wait);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+#endif
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ cy_shutdown(info, port->tty);
+}
+
+/*
+ * This routine is called when a particular tty device is closed.
+ */
+static void cy_close(struct tty_struct *tty, struct file *filp)
+{
+ struct cyclades_port *info = tty->driver_data;
+ if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
+ return;
+ tty_port_close(&info->port, tty, filp);
+} /* cy_close */
+
+/* This routine gets called when tty_write has put something into
+ * the write_queue. The characters may come from user space or
+ * kernel space.
+ *
+ * This routine will return the number of characters actually
+ * accepted for writing.
+ *
+ * If the port is not already transmitting stuff, start it off by
+ * enabling interrupts. The interrupt service routine will then
+ * ensure that the characters are sent.
+ * If the port is already active, there is no need to kick it.
+ *
+ */
+static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ struct cyclades_port *info = tty->driver_data;
+ unsigned long flags;
+ int c, ret = 0;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_write"))
+ return 0;
+
+ if (!info->port.xmit_buf)
+ return 0;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ while (1) {
+ c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
+ c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
+
+ if (c <= 0)
+ break;
+
+ memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
+ info->xmit_head = (info->xmit_head + c) &
+ (SERIAL_XMIT_SIZE - 1);
+ info->xmit_cnt += c;
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+ info->idle_stats.xmit_bytes += ret;
+ info->idle_stats.xmit_idle = jiffies;
+
+ if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
+ start_xmit(info);
+
+ return ret;
+} /* cy_write */
+
+/*
+ * This routine is called by the kernel to write a single
+ * character to the tty device. If the kernel uses this routine,
+ * it must call the flush_chars() routine (if defined) when it is
+ * done stuffing characters into the driver. If there is no room
+ * in the queue, the character is ignored.
+ */
+static int cy_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct cyclades_port *info = tty->driver_data;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_put_char"))
+ return 0;
+
+ if (!info->port.xmit_buf)
+ return 0;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+ return 0;
+ }
+
+ info->port.xmit_buf[info->xmit_head++] = ch;
+ info->xmit_head &= SERIAL_XMIT_SIZE - 1;
+ info->xmit_cnt++;
+ info->idle_stats.xmit_bytes++;
+ info->idle_stats.xmit_idle = jiffies;
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+ return 1;
+} /* cy_put_char */
+
+/*
+ * This routine is called by the kernel after it has written a
+ * series of characters to the tty device using put_char().
+ */
+static void cy_flush_chars(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
+ return;
+
+ if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !info->port.xmit_buf)
+ return;
+
+ start_xmit(info);
+} /* cy_flush_chars */
+
+/*
+ * This routine returns the numbers of characters the tty driver
+ * will accept for queuing to be written. This number is subject
+ * to change as output buffers get emptied, or if the output flow
+ * control is activated.
+ */
+static int cy_write_room(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ int ret;
+
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_write_room"))
+ return 0;
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+} /* cy_write_room */
+
+static int cy_chars_in_buffer(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
+ return 0;
+
+#ifdef Z_EXT_CHARS_IN_BUFFER
+ if (!cy_is_Z(info->card)) {
+#endif /* Z_EXT_CHARS_IN_BUFFER */
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
+ info->line, info->xmit_cnt);
+#endif
+ return info->xmit_cnt;
+#ifdef Z_EXT_CHARS_IN_BUFFER
+ } else {
+ struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+ int char_count;
+ __u32 tx_put, tx_get, tx_bufsize;
+
+ tx_get = readl(&buf_ctrl->tx_get);
+ tx_put = readl(&buf_ctrl->tx_put);
+ tx_bufsize = readl(&buf_ctrl->tx_bufsize);
+ if (tx_put >= tx_get)
+ char_count = tx_put - tx_get;
+ else
+ char_count = tx_put - tx_get + tx_bufsize;
+#ifdef CY_DEBUG_IO
+ printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
+ info->line, info->xmit_cnt + char_count);
+#endif
+ return info->xmit_cnt + char_count;
+ }
+#endif /* Z_EXT_CHARS_IN_BUFFER */
+} /* cy_chars_in_buffer */
+
+/*
+ * ------------------------------------------------------------
+ * cy_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
+{
+ int co, co_val, bpr;
+ __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
+ 25000000);
+
+ if (baud == 0) {
+ info->tbpr = info->tco = info->rbpr = info->rco = 0;
+ return;
+ }
+
+ /* determine which prescaler to use */
+ for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
+ if (cy_clock / co_val / baud > 63)
+ break;
+ }
+
+ bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
+ if (bpr > 255)
+ bpr = 255;
+
+ info->tbpr = info->rbpr = bpr;
+ info->tco = info->rco = co;
+}
+
+/*
+ * This routine finds or computes the various line characteristics.
+ * It used to be called config_setup
+ */
+static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
+{
+ struct cyclades_card *card;
+ unsigned long flags;
+ int channel;
+ unsigned cflag, iflag;
+ int baud, baud_rate = 0;
+ int i;
+
+ if (!tty->termios) /* XXX can this happen at all? */
+ return;
+
+ if (info->line == -1)
+ return;
+
+ cflag = tty->termios->c_cflag;
+ iflag = tty->termios->c_iflag;
+
+ /*
+ * Set up the tty->alt_speed kludge
+ */
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ tty->alt_speed = 57600;
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ tty->alt_speed = 115200;
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ tty->alt_speed = 230400;
+ if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ tty->alt_speed = 460800;
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ if (!cy_is_Z(card)) {
+ u32 cflags;
+
+ /* baud rate */
+ baud = tty_get_baud_rate(tty);
+ if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ if (info->custom_divisor)
+ baud_rate = info->baud / info->custom_divisor;
+ else
+ baud_rate = info->baud;
+ } else if (baud > CD1400_MAX_SPEED) {
+ baud = CD1400_MAX_SPEED;
+ }
+ /* find the baud index */
+ for (i = 0; i < 20; i++) {
+ if (baud == baud_table[i])
+ break;
+ }
+ if (i == 20)
+ i = 19; /* CD1400_MAX_SPEED */
+
+ if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ cyy_baud_calc(info, baud_rate);
+ } else {
+ if (info->chip_rev >= CD1400_REV_J) {
+ /* It is a CD1400 rev. J or later */
+ info->tbpr = baud_bpr_60[i]; /* Tx BPR */
+ info->tco = baud_co_60[i]; /* Tx CO */
+ info->rbpr = baud_bpr_60[i]; /* Rx BPR */
+ info->rco = baud_co_60[i]; /* Rx CO */
+ } else {
+ info->tbpr = baud_bpr_25[i]; /* Tx BPR */
+ info->tco = baud_co_25[i]; /* Tx CO */
+ info->rbpr = baud_bpr_25[i]; /* Rx BPR */
+ info->rco = baud_co_25[i]; /* Rx CO */
+ }
+ }
+ if (baud_table[i] == 134) {
+ /* get it right for 134.5 baud */
+ info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
+ 2;
+ } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud_rate) + 2;
+ } else if (baud_table[i]) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud_table[i]) + 2;
+ /* this needs to be propagated into the card info */
+ } else {
+ info->timeout = 0;
+ }
+ /* By tradition (is it a standard?) a baud rate of zero
+ implies the line should be/has been closed. A bit
+ later in this routine such a test is performed. */
+
+ /* byte size and parity */
+ info->cor5 = 0;
+ info->cor4 = 0;
+ /* receive threshold */
+ info->cor3 = (info->default_threshold ?
+ info->default_threshold : baud_cor3[i]);
+ info->cor2 = CyETC;
+ switch (cflag & CSIZE) {
+ case CS5:
+ info->cor1 = Cy_5_BITS;
+ break;
+ case CS6:
+ info->cor1 = Cy_6_BITS;
+ break;
+ case CS7:
+ info->cor1 = Cy_7_BITS;
+ break;
+ case CS8:
+ info->cor1 = Cy_8_BITS;
+ break;
+ }
+ if (cflag & CSTOPB)
+ info->cor1 |= Cy_2_STOP;
+
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ info->cor1 |= CyPARITY_O;
+ else
+ info->cor1 |= CyPARITY_E;
+ } else
+ info->cor1 |= CyPARITY_NONE;
+
+ /* CTS flow control flag */
+ if (cflag & CRTSCTS) {
+ info->port.flags |= ASYNC_CTS_FLOW;
+ info->cor2 |= CyCtsAE;
+ } else {
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+ info->cor2 &= ~CyCtsAE;
+ }
+ if (cflag & CLOCAL)
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ info->port.flags |= ASYNC_CHECK_CD;
+
+ /***********************************************
+ The hardware option, CyRtsAO, presents RTS when
+ the chip has characters to send. Since most modems
+ use RTS as reverse (inbound) flow control, this
+ option is not used. If inbound flow control is
+ necessary, DTR can be programmed to provide the
+ appropriate signals for use with a non-standard
+ cable. Contact Marcio Saito for details.
+ ***********************************************/
+
+ channel &= 0x03;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel);
+
+ /* tx and rx baud rate */
+
+ cyy_writeb(info, CyTCOR, info->tco);
+ cyy_writeb(info, CyTBPR, info->tbpr);
+ cyy_writeb(info, CyRCOR, info->rco);
+ cyy_writeb(info, CyRBPR, info->rbpr);
+
+ /* set line characteristics according configuration */
+
+ cyy_writeb(info, CySCHR1, START_CHAR(tty));
+ cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
+ cyy_writeb(info, CyCOR1, info->cor1);
+ cyy_writeb(info, CyCOR2, info->cor2);
+ cyy_writeb(info, CyCOR3, info->cor3);
+ cyy_writeb(info, CyCOR4, info->cor4);
+ cyy_writeb(info, CyCOR5, info->cor5);
+
+ cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
+ CyCOR3ch);
+
+ /* !!! Is this needed? */
+ cyy_writeb(info, CyCAR, channel);
+ cyy_writeb(info, CyRTPR,
+ (info->default_timeout ? info->default_timeout : 0x02));
+ /* 10ms rx timeout */
+
+ cflags = CyCTS;
+ if (!C_CLOCAL(tty))
+ cflags |= CyDSR | CyRI | CyDCD;
+ /* without modem intr */
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
+ /* act on 1->0 modem transitions */
+ if ((cflag & CRTSCTS) && info->rflow)
+ cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
+ else
+ cyy_writeb(info, CyMCOR1, cflags);
+ /* act on 0->1 modem transitions */
+ cyy_writeb(info, CyMCOR2, cflags);
+
+ if (i == 0) /* baud rate is zero, turn off line */
+ cyy_change_rts_dtr(info, 0, TIOCM_DTR);
+ else
+ cyy_change_rts_dtr(info, TIOCM_DTR, 0);
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ } else {
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ __u32 sw_flow;
+ int retval;
+
+ if (!cyz_is_loaded(card))
+ return;
+
+ /* baud rate */
+ baud = tty_get_baud_rate(tty);
+ if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ if (info->custom_divisor)
+ baud_rate = info->baud / info->custom_divisor;
+ else
+ baud_rate = info->baud;
+ } else if (baud > CYZ_MAX_SPEED) {
+ baud = CYZ_MAX_SPEED;
+ }
+ cy_writel(&ch_ctrl->comm_baud, baud);
+
+ if (baud == 134) {
+ /* get it right for 134.5 baud */
+ info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
+ 2;
+ } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+ ASYNC_SPD_CUST) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud_rate) + 2;
+ } else if (baud) {
+ info->timeout = (info->xmit_fifo_size * HZ * 15 /
+ baud) + 2;
+ /* this needs to be propagated into the card info */
+ } else {
+ info->timeout = 0;
+ }
+
+ /* byte size and parity */
+ switch (cflag & CSIZE) {
+ case CS5:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
+ break;
+ case CS6:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
+ break;
+ case CS7:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
+ break;
+ case CS8:
+ cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
+ break;
+ }
+ if (cflag & CSTOPB) {
+ cy_writel(&ch_ctrl->comm_data_l,
+ readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
+ } else {
+ cy_writel(&ch_ctrl->comm_data_l,
+ readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
+ }
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
+ else
+ cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
+ } else
+ cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
+
+ /* CTS flow control flag */
+ if (cflag & CRTSCTS) {
+ cy_writel(&ch_ctrl->hw_flow,
+ readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
+ } else {
+ cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
+ ~(C_RS_CTS | C_RS_RTS));
+ }
+ /* As the HW flow control is done in firmware, the driver
+ doesn't need to care about it */
+ info->port.flags &= ~ASYNC_CTS_FLOW;
+
+ /* XON/XOFF/XANY flow control flags */
+ sw_flow = 0;
+ if (iflag & IXON) {
+ sw_flow |= C_FL_OXX;
+ if (iflag & IXANY)
+ sw_flow |= C_FL_OIXANY;
+ }
+ cy_writel(&ch_ctrl->sw_flow, sw_flow);
+
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+
+ /* CD sensitivity */
+ if (cflag & CLOCAL)
+ info->port.flags &= ~ASYNC_CHECK_CD;
+ else
+ info->port.flags |= ASYNC_CHECK_CD;
+
+ if (baud == 0) { /* baud rate is zero, turn off line */
+ cy_writel(&ch_ctrl->rs_control,
+ readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
+#endif
+ } else {
+ cy_writel(&ch_ctrl->rs_control,
+ readl(&ch_ctrl->rs_control) | C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
+#endif
+ }
+
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ }
+} /* set_line_char */
+
+static int cy_get_serial_info(struct cyclades_port *info,
+ struct serial_struct __user *retinfo)
+{
+ struct cyclades_card *cinfo = info->card;
+ struct serial_struct tmp = {
+ .type = info->type,
+ .line = info->line,
+ .port = (info->card - cy_card) * 0x100 + info->line -
+ cinfo->first_line,
+ .irq = cinfo->irq,
+ .flags = info->port.flags,
+ .close_delay = info->port.close_delay,
+ .closing_wait = info->port.closing_wait,
+ .baud_base = info->baud,
+ .custom_divisor = info->custom_divisor,
+ .hub6 = 0, /*!!! */
+ };
+ return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
+}
+
+static int
+cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
+ struct serial_struct __user *new_info)
+{
+ struct serial_struct new_serial;
+ int ret;
+
+ if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+ return -EFAULT;
+
+ mutex_lock(&info->port.mutex);
+ if (!capable(CAP_SYS_ADMIN)) {
+ if (new_serial.close_delay != info->port.close_delay ||
+ new_serial.baud_base != info->baud ||
+ (new_serial.flags & ASYNC_FLAGS &
+ ~ASYNC_USR_MASK) !=
+ (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
+ {
+ mutex_unlock(&info->port.mutex);
+ return -EPERM;
+ }
+ info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK);
+ info->baud = new_serial.baud_base;
+ info->custom_divisor = new_serial.custom_divisor;
+ goto check_and_exit;
+ }
+
+ /*
+ * OK, past this point, all the error checking has been done.
+ * At this point, we start making changes.....
+ */
+
+ info->baud = new_serial.baud_base;
+ info->custom_divisor = new_serial.custom_divisor;
+ info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS);
+ info->port.close_delay = new_serial.close_delay * HZ / 100;
+ info->port.closing_wait = new_serial.closing_wait * HZ / 100;
+
+check_and_exit:
+ if (info->port.flags & ASYNC_INITIALIZED) {
+ cy_set_line_char(info, tty);
+ ret = 0;
+ } else {
+ ret = cy_startup(info, tty);
+ }
+ mutex_unlock(&info->port.mutex);
+ return ret;
+} /* set_serial_info */
+
+/*
+ * get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * is emptied. On bus types like RS485, the transmitter must
+ * release the bus after transmitting. This must be done when
+ * the transmit shift register is empty, not be done when the
+ * transmit holding register is empty. This functionality
+ * allows an RS485 driver to be written in user space.
+ */
+static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
+{
+ struct cyclades_card *card = info->card;
+ unsigned int result;
+ unsigned long flags;
+ u8 status;
+
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ result = (status ? 0 : TIOCSER_TEMT);
+ } else {
+ /* Not supported yet */
+ return -EINVAL;
+ }
+ return put_user(result, (unsigned long __user *)value);
+}
+
+static int cy_tiocmget(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ int result;
+
+ if (serial_paranoia_check(info, tty->name, __func__))
+ return -ENODEV;
+
+ card = info->card;
+
+ if (!cy_is_Z(card)) {
+ unsigned long flags;
+ int channel = info->line - card->first_line;
+ u8 status;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ status = cyy_readb(info, CyMSVR1);
+ status |= cyy_readb(info, CyMSVR2);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ if (info->rtsdtr_inv) {
+ result = ((status & CyRTS) ? TIOCM_DTR : 0) |
+ ((status & CyDTR) ? TIOCM_RTS : 0);
+ } else {
+ result = ((status & CyRTS) ? TIOCM_RTS : 0) |
+ ((status & CyDTR) ? TIOCM_DTR : 0);
+ }
+ result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
+ ((status & CyRI) ? TIOCM_RNG : 0) |
+ ((status & CyDSR) ? TIOCM_DSR : 0) |
+ ((status & CyCTS) ? TIOCM_CTS : 0);
+ } else {
+ u32 lstatus;
+
+ if (!cyz_is_loaded(card)) {
+ result = -ENODEV;
+ goto end;
+ }
+
+ lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
+ result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
+ ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
+ ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
+ ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
+ ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
+ ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
+ }
+end:
+ return result;
+} /* cy_tiomget */
+
+static int
+cy_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, __func__))
+ return -ENODEV;
+
+ card = info->card;
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_change_rts_dtr(info, set, clear);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ int retval, channel = info->line - card->first_line;
+ u32 rs;
+
+ if (!cyz_is_loaded(card))
+ return -ENODEV;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ rs = readl(&ch_ctrl->rs_control);
+ if (set & TIOCM_RTS)
+ rs |= C_RS_RTS;
+ if (clear & TIOCM_RTS)
+ rs &= ~C_RS_RTS;
+ if (set & TIOCM_DTR) {
+ rs |= C_RS_DTR;
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
+#endif
+ }
+ if (clear & TIOCM_DTR) {
+ rs &= ~C_RS_DTR;
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "cyc:set_modem_info clearing "
+ "Z DTR\n");
+#endif
+ }
+ cy_writel(&ch_ctrl->rs_control, rs);
+ retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
+ "was %x\n", info->line, retval);
+ }
+ }
+ return 0;
+}
+
+/*
+ * cy_break() --- routine which turns the break handling on or off
+ */
+static int cy_break(struct tty_struct *tty, int break_state)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+ int retval = 0;
+
+ if (serial_paranoia_check(info, tty->name, "cy_break"))
+ return -EINVAL;
+
+ card = info->card;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ if (!cy_is_Z(card)) {
+ /* Let the transmit ISR take care of this (since it
+ requires stuffing characters into the output stream).
+ */
+ if (break_state == -1) {
+ if (!info->breakon) {
+ info->breakon = 1;
+ if (!info->xmit_cnt) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ start_xmit(info);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+ }
+ } else {
+ if (!info->breakoff) {
+ info->breakoff = 1;
+ if (!info->xmit_cnt) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ start_xmit(info);
+ spin_lock_irqsave(&card->card_lock, flags);
+ }
+ }
+ }
+ } else {
+ if (break_state == -1) {
+ retval = cyz_issue_cmd(card,
+ info->line - card->first_line,
+ C_CM_SET_BREAK, 0L);
+ if (retval != 0) {
+ printk(KERN_ERR "cyc:cy_break (set) retval on "
+ "ttyC%d was %x\n", info->line, retval);
+ }
+ } else {
+ retval = cyz_issue_cmd(card,
+ info->line - card->first_line,
+ C_CM_CLR_BREAK, 0L);
+ if (retval != 0) {
+ printk(KERN_DEBUG "cyc:cy_break (clr) retval "
+ "on ttyC%d was %x\n", info->line,
+ retval);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return retval;
+} /* cy_break */
+
+static int set_threshold(struct cyclades_port *info, unsigned long value)
+{
+ struct cyclades_card *card = info->card;
+ unsigned long flags;
+
+ if (!cy_is_Z(card)) {
+ info->cor3 &= ~CyREC_FIFO;
+ info->cor3 |= value & CyREC_FIFO;
+
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyCOR3, info->cor3);
+ cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+ return 0;
+} /* set_threshold */
+
+static int get_threshold(struct cyclades_port *info,
+ unsigned long __user *value)
+{
+ struct cyclades_card *card = info->card;
+
+ if (!cy_is_Z(card)) {
+ u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
+ return put_user(tmp, value);
+ }
+ return 0;
+} /* get_threshold */
+
+static int set_timeout(struct cyclades_port *info, unsigned long value)
+{
+ struct cyclades_card *card = info->card;
+ unsigned long flags;
+
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_writeb(info, CyRTPR, value & 0xff);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+ return 0;
+} /* set_timeout */
+
+static int get_timeout(struct cyclades_port *info,
+ unsigned long __user *value)
+{
+ struct cyclades_card *card = info->card;
+
+ if (!cy_is_Z(card)) {
+ u8 tmp = cyy_readb(info, CyRTPR);
+ return put_user(tmp, value);
+ }
+ return 0;
+} /* get_timeout */
+
+static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
+ struct cyclades_icount *cprev)
+{
+ struct cyclades_icount cnow;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ cnow = info->icount; /* atomic copy */
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+ ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
+
+ *cprev = cnow;
+
+ return ret;
+}
+
+/*
+ * This routine allows the tty driver to implement device-
+ * specific ioctl's. If the ioctl number passed in cmd is
+ * not recognized by the driver, it should return ENOIOCTLCMD.
+ */
+static int
+cy_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_icount cnow; /* kernel counter temps */
+ int ret_val = 0;
+ unsigned long flags;
+ void __user *argp = (void __user *)arg;
+
+ if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
+ return -ENODEV;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
+ info->line, cmd, arg);
+#endif
+
+ switch (cmd) {
+ case CYGETMON:
+ if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
+ ret_val = -EFAULT;
+ break;
+ }
+ memset(&info->mon, 0, sizeof(info->mon));
+ break;
+ case CYGETTHRESH:
+ ret_val = get_threshold(info, argp);
+ break;
+ case CYSETTHRESH:
+ ret_val = set_threshold(info, arg);
+ break;
+ case CYGETDEFTHRESH:
+ ret_val = put_user(info->default_threshold,
+ (unsigned long __user *)argp);
+ break;
+ case CYSETDEFTHRESH:
+ info->default_threshold = arg & 0x0f;
+ break;
+ case CYGETTIMEOUT:
+ ret_val = get_timeout(info, argp);
+ break;
+ case CYSETTIMEOUT:
+ ret_val = set_timeout(info, arg);
+ break;
+ case CYGETDEFTIMEOUT:
+ ret_val = put_user(info->default_timeout,
+ (unsigned long __user *)argp);
+ break;
+ case CYSETDEFTIMEOUT:
+ info->default_timeout = arg & 0xff;
+ break;
+ case CYSETRFLOW:
+ info->rflow = (int)arg;
+ break;
+ case CYGETRFLOW:
+ ret_val = info->rflow;
+ break;
+ case CYSETRTSDTR_INV:
+ info->rtsdtr_inv = (int)arg;
+ break;
+ case CYGETRTSDTR_INV:
+ ret_val = info->rtsdtr_inv;
+ break;
+ case CYGETCD1400VER:
+ ret_val = info->chip_rev;
+ break;
+#ifndef CONFIG_CYZ_INTR
+ case CYZSETPOLLCYCLE:
+ cyz_polling_cycle = (arg * HZ) / 1000;
+ break;
+ case CYZGETPOLLCYCLE:
+ ret_val = (cyz_polling_cycle * 1000) / HZ;
+ break;
+#endif /* CONFIG_CYZ_INTR */
+ case CYSETWAIT:
+ info->port.closing_wait = (unsigned short)arg * HZ / 100;
+ break;
+ case CYGETWAIT:
+ ret_val = info->port.closing_wait / (HZ / 100);
+ break;
+ case TIOCGSERIAL:
+ ret_val = cy_get_serial_info(info, argp);
+ break;
+ case TIOCSSERIAL:
+ ret_val = cy_set_serial_info(info, tty, argp);
+ break;
+ case TIOCSERGETLSR: /* Get line status register */
+ ret_val = get_lsr_info(info, argp);
+ break;
+ /*
+ * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+ * - mask passed in arg for lines of interest
+ * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+ * Caller should use TIOCGICOUNT to see which one it was
+ */
+ case TIOCMIWAIT:
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ /* note the counters on entry */
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+ ret_val = wait_event_interruptible(info->port.delta_msr_wait,
+ cy_cflags_changed(info, arg, &cnow));
+ break;
+
+ /*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+ default:
+ ret_val = -ENOIOCTLCMD;
+ }
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_ioctl done\n");
+#endif
+ return ret_val;
+} /* cy_ioctl */
+
+static int cy_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *sic)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_icount cnow; /* Used to snapshot */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+ sic->cts = cnow.cts;
+ sic->dsr = cnow.dsr;
+ sic->rng = cnow.rng;
+ sic->dcd = cnow.dcd;
+ sic->rx = cnow.rx;
+ sic->tx = cnow.tx;
+ sic->frame = cnow.frame;
+ sic->overrun = cnow.overrun;
+ sic->parity = cnow.parity;
+ sic->brk = cnow.brk;
+ sic->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
+/*
+ * This routine allows the tty driver to be notified when
+ * device's termios settings have changed. Note that a
+ * well-designed tty driver should be prepared to accept the case
+ * where old == NULL, and try to do something rational.
+ */
+static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
+#endif
+
+ cy_set_line_char(info, tty);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ cy_start(tty);
+ }
+#if 0
+ /*
+ * No need to wake up processes in open wait, since they
+ * sample the CLOCAL flag once, and don't recheck it.
+ * XXX It's not clear whether the current behavior is correct
+ * or not. Hence, this may change.....
+ */
+ if (!(old_termios->c_cflag & CLOCAL) &&
+ (tty->termios->c_cflag & CLOCAL))
+ wake_up_interruptible(&info->port.open_wait);
+#endif
+} /* cy_set_termios */
+
+/* This function is used to send a high-priority XON/XOFF character to
+ the device.
+*/
+static void cy_send_xchar(struct tty_struct *tty, char ch)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ int channel;
+
+ if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
+ return;
+
+ info->x_char = ch;
+
+ if (ch)
+ cy_start(tty);
+
+ card = info->card;
+ channel = info->line - card->first_line;
+
+ if (cy_is_Z(card)) {
+ if (ch == STOP_CHAR(tty))
+ cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
+ else if (ch == START_CHAR(tty))
+ cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
+ }
+}
+
+/* This routine is called by the upper-layer tty layer to signal
+ that incoming characters should be throttled because the input
+ buffers are close to full.
+ */
+static void cy_throttle(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_THROTTLE
+ char buf[64];
+
+ printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty), info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_throttle"))
+ return;
+
+ card = info->card;
+
+ if (I_IXOFF(tty)) {
+ if (!cy_is_Z(card))
+ cy_send_xchar(tty, STOP_CHAR(tty));
+ else
+ info->throttle = 1;
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_change_rts_dtr(info, 0, TIOCM_RTS);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+ info->throttle = 1;
+ }
+ }
+} /* cy_throttle */
+
+/*
+ * This routine notifies the tty driver that it should signal
+ * that characters can now be sent to the tty without fear of
+ * overrunning the input buffers of the line disciplines.
+ */
+static void cy_unthrottle(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_card *card;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_THROTTLE
+ char buf[64];
+
+ printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
+ tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ cy_send_xchar(tty, START_CHAR(tty));
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ card = info->card;
+ if (!cy_is_Z(card)) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ cyy_change_rts_dtr(info, TIOCM_RTS, 0);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ } else {
+ info->throttle = 0;
+ }
+ }
+} /* cy_unthrottle */
+
+/* cy_start and cy_stop provide software output flow control as a
+ function of XON/XOFF, software CTS, and other such stuff.
+*/
+static void cy_stop(struct tty_struct *tty)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info = tty->driver_data;
+ int channel;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_stop"))
+ return;
+
+ cinfo = info->card;
+ channel = info->line - cinfo->first_line;
+ if (!cy_is_Z(cinfo)) {
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+ }
+} /* cy_stop */
+
+static void cy_start(struct tty_struct *tty)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info = tty->driver_data;
+ int channel;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_start"))
+ return;
+
+ cinfo = info->card;
+ channel = info->line - cinfo->first_line;
+ if (!cy_is_Z(cinfo)) {
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+ }
+} /* cy_start */
+
+/*
+ * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void cy_hangup(struct tty_struct *tty)
+{
+ struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+ printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_hangup"))
+ return;
+
+ cy_flush_buffer(tty);
+ cy_shutdown(info, tty);
+ tty_port_hangup(&info->port);
+} /* cy_hangup */
+
+static int cyy_carrier_raised(struct tty_port *port)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *cinfo = info->card;
+ unsigned long flags;
+ int channel = info->line - cinfo->first_line;
+ u32 cd;
+
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_writeb(info, CyCAR, channel & 0x03);
+ cd = cyy_readb(info, CyMSVR1) & CyDCD;
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+
+ return cd;
+}
+
+static void cyy_dtr_rts(struct tty_port *port, int raise)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *cinfo = info->card;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cinfo->card_lock, flags);
+ cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
+ raise ? 0 : TIOCM_RTS | TIOCM_DTR);
+ spin_unlock_irqrestore(&cinfo->card_lock, flags);
+}
+
+static int cyz_carrier_raised(struct tty_port *port)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+
+ return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
+}
+
+static void cyz_dtr_rts(struct tty_port *port, int raise)
+{
+ struct cyclades_port *info = container_of(port, struct cyclades_port,
+ port);
+ struct cyclades_card *cinfo = info->card;
+ struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+ int ret, channel = info->line - cinfo->first_line;
+ u32 rs;
+
+ rs = readl(&ch_ctrl->rs_control);
+ if (raise)
+ rs |= C_RS_RTS | C_RS_DTR;
+ else
+ rs &= ~(C_RS_RTS | C_RS_DTR);
+ cy_writel(&ch_ctrl->rs_control, rs);
+ ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
+ if (ret != 0)
+ printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
+ __func__, info->line, ret);
+#ifdef CY_DEBUG_DTR
+ printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
+#endif
+}
+
+static const struct tty_port_operations cyy_port_ops = {
+ .carrier_raised = cyy_carrier_raised,
+ .dtr_rts = cyy_dtr_rts,
+ .shutdown = cy_do_close,
+};
+
+static const struct tty_port_operations cyz_port_ops = {
+ .carrier_raised = cyz_carrier_raised,
+ .dtr_rts = cyz_dtr_rts,
+ .shutdown = cy_do_close,
+};
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_init() and friends
+ *
+ * cy_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+static int __devinit cy_init_card(struct cyclades_card *cinfo)
+{
+ struct cyclades_port *info;
+ unsigned int channel, port;
+
+ spin_lock_init(&cinfo->card_lock);
+ cinfo->intr_enabled = 0;
+
+ cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
+ GFP_KERNEL);
+ if (cinfo->ports == NULL) {
+ printk(KERN_ERR "Cyclades: cannot allocate ports\n");
+ return -ENOMEM;
+ }
+
+ for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
+ channel++, port++) {
+ info = &cinfo->ports[channel];
+ tty_port_init(&info->port);
+ info->magic = CYCLADES_MAGIC;
+ info->card = cinfo;
+ info->line = port;
+
+ info->port.closing_wait = CLOSING_WAIT_DELAY;
+ info->port.close_delay = 5 * HZ / 10;
+ info->port.flags = STD_COM_FLAGS;
+ init_completion(&info->shutdown_wait);
+
+ if (cy_is_Z(cinfo)) {
+ struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
+ struct ZFW_CTRL *zfw_ctrl;
+
+ info->port.ops = &cyz_port_ops;
+ info->type = PORT_STARTECH;
+
+ zfw_ctrl = cinfo->base_addr +
+ (readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
+ info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
+
+ if (cinfo->hw_ver == ZO_V1)
+ info->xmit_fifo_size = CYZ_FIFO_SIZE;
+ else
+ info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
+#ifdef CONFIG_CYZ_INTR
+ setup_timer(&cyz_rx_full_timer[port],
+ cyz_rx_restart, (unsigned long)info);
+#endif
+ } else {
+ unsigned short chip_number;
+ int index = cinfo->bus_index;
+
+ info->port.ops = &cyy_port_ops;
+ info->type = PORT_CIRRUS;
+ info->xmit_fifo_size = CyMAX_CHAR_FIFO;
+ info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
+ info->cor2 = CyETC;
+ info->cor3 = 0x08; /* _very_ small rcv threshold */
+
+ chip_number = channel / CyPORTS_PER_CHIP;
+ info->u.cyy.base_addr = cinfo->base_addr +
+ (cy_chip_offset[chip_number] << index);
+ info->chip_rev = cyy_readb(info, CyGFRCR);
+
+ if (info->chip_rev >= CD1400_REV_J) {
+ /* It is a CD1400 rev. J or later */
+ info->tbpr = baud_bpr_60[13]; /* Tx BPR */
+ info->tco = baud_co_60[13]; /* Tx CO */
+ info->rbpr = baud_bpr_60[13]; /* Rx BPR */
+ info->rco = baud_co_60[13]; /* Rx CO */
+ info->rtsdtr_inv = 1;
+ } else {
+ info->tbpr = baud_bpr_25[13]; /* Tx BPR */
+ info->tco = baud_co_25[13]; /* Tx CO */
+ info->rbpr = baud_bpr_25[13]; /* Rx BPR */
+ info->rco = baud_co_25[13]; /* Rx CO */
+ info->rtsdtr_inv = 0;
+ }
+ info->read_status_mask = CyTIMEOUT | CySPECHAR |
+ CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
+ }
+
+ }
+
+#ifndef CONFIG_CYZ_INTR
+ if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
+ mod_timer(&cyz_timerlist, jiffies + 1);
+#ifdef CY_PCI_DEBUG
+ printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
+#endif
+ }
+#endif
+ return 0;
+}
+
+/* initialize chips on Cyclom-Y card -- return number of valid
+ chips (which is number of ports/4) */
+static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
+ int index)
+{
+ unsigned int chip_number;
+ void __iomem *base_addr;
+
+ cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
+ /* Cy_HwReset is 0x1400 */
+ cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
+ /* Cy_ClrIntr is 0x1800 */
+ udelay(500L);
+
+ for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
+ chip_number++) {
+ base_addr =
+ true_base_addr + (cy_chip_offset[chip_number] << index);
+ mdelay(1);
+ if (readb(base_addr + (CyCCR << index)) != 0x00) {
+ /*************
+ printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
+ chip_number, (unsigned long)base_addr);
+ *************/
+ return chip_number;
+ }
+
+ cy_writeb(base_addr + (CyGFRCR << index), 0);
+ udelay(10L);
+
+ /* The Cyclom-16Y does not decode address bit 9 and therefore
+ cannot distinguish between references to chip 0 and a non-
+ existent chip 4. If the preceding clearing of the supposed
+ chip 4 GFRCR register appears at chip 0, there is no chip 4
+ and this must be a Cyclom-16Y, not a Cyclom-32Ye.
+ */
+ if (chip_number == 4 && readb(true_base_addr +
+ (cy_chip_offset[0] << index) +
+ (CyGFRCR << index)) == 0) {
+ return chip_number;
+ }
+
+ cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
+ mdelay(1);
+
+ if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
+ /*
+ printk(" chip #%d at %#6lx is not responding ",
+ chip_number, (unsigned long)base_addr);
+ printk("(GFRCR stayed 0)\n",
+ */
+ return chip_number;
+ }
+ if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
+ 0x40) {
+ /*
+ printk(" chip #%d at %#6lx is not valid (GFRCR == "
+ "%#2x)\n",
+ chip_number, (unsigned long)base_addr,
+ base_addr[CyGFRCR<<index]);
+ */
+ return chip_number;
+ }
+ cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
+ if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
+ /* It is a CD1400 rev. J or later */
+ /* Impossible to reach 5ms with this chip.
+ Changed to 2ms instead (f = 500 Hz). */
+ cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
+ } else {
+ /* f = 200 Hz */
+ cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
+ }
+
+ /*
+ printk(" chip #%d at %#6lx is rev 0x%2x\n",
+ chip_number, (unsigned long)base_addr,
+ readb(base_addr+(CyGFRCR<<index)));
+ */
+ }
+ return chip_number;
+} /* cyy_init_card */
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
+ * sets global variables and return the number of ISA boards found.
+ * ---------------------------------------------------------------------
+ */
+static int __init cy_detect_isa(void)
+{
+#ifdef CONFIG_ISA
+ unsigned short cy_isa_irq, nboard;
+ void __iomem *cy_isa_address;
+ unsigned short i, j, cy_isa_nchan;
+ int isparam = 0;
+
+ nboard = 0;
+
+ /* Check for module parameters */
+ for (i = 0; i < NR_CARDS; i++) {
+ if (maddr[i] || i) {
+ isparam = 1;
+ cy_isa_addresses[i] = maddr[i];
+ }
+ if (!maddr[i])
+ break;
+ }
+
+ /* scan the address table probing for Cyclom-Y/ISA boards */
+ for (i = 0; i < NR_ISA_ADDRS; i++) {
+ unsigned int isa_address = cy_isa_addresses[i];
+ if (isa_address == 0x0000)
+ return nboard;
+
+ /* probe for CD1400... */
+ cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
+ if (cy_isa_address == NULL) {
+ printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
+ "address\n");
+ continue;
+ }
+ cy_isa_nchan = CyPORTS_PER_CHIP *
+ cyy_init_card(cy_isa_address, 0);
+ if (cy_isa_nchan == 0) {
+ iounmap(cy_isa_address);
+ continue;
+ }
+
+ if (isparam && i < NR_CARDS && irq[i])
+ cy_isa_irq = irq[i];
+ else
+ /* find out the board's irq by probing */
+ cy_isa_irq = detect_isa_irq(cy_isa_address);
+ if (cy_isa_irq == 0) {
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
+ "IRQ could not be detected.\n",
+ (unsigned long)cy_isa_address);
+ iounmap(cy_isa_address);
+ continue;
+ }
+
+ if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
+ "more channels are available. Change NR_PORTS "
+ "in cyclades.c and recompile kernel.\n",
+ (unsigned long)cy_isa_address);
+ iounmap(cy_isa_address);
+ return nboard;
+ }
+ /* fill the next cy_card structure available */
+ for (j = 0; j < NR_CARDS; j++) {
+ if (cy_card[j].base_addr == NULL)
+ break;
+ }
+ if (j == NR_CARDS) { /* no more cy_cards available */
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
+ "more cards can be used. Change NR_CARDS in "
+ "cyclades.c and recompile kernel.\n",
+ (unsigned long)cy_isa_address);
+ iounmap(cy_isa_address);
+ return nboard;
+ }
+
+ /* allocate IRQ */
+ if (request_irq(cy_isa_irq, cyy_interrupt,
+ IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
+ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
+ "could not allocate IRQ#%d.\n",
+ (unsigned long)cy_isa_address, cy_isa_irq);
+ iounmap(cy_isa_address);
+ return nboard;
+ }
+
+ /* set cy_card */
+ cy_card[j].base_addr = cy_isa_address;
+ cy_card[j].ctl_addr.p9050 = NULL;
+ cy_card[j].irq = (int)cy_isa_irq;
+ cy_card[j].bus_index = 0;
+ cy_card[j].first_line = cy_next_channel;
+ cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
+ cy_card[j].nports = cy_isa_nchan;
+ if (cy_init_card(&cy_card[j])) {
+ cy_card[j].base_addr = NULL;
+ free_irq(cy_isa_irq, &cy_card[j]);
+ iounmap(cy_isa_address);
+ continue;
+ }
+ nboard++;
+
+ printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
+ "%d channels starting from port %d\n",
+ j + 1, (unsigned long)cy_isa_address,
+ (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
+ cy_isa_irq, cy_isa_nchan, cy_next_channel);
+
+ for (j = cy_next_channel;
+ j < cy_next_channel + cy_isa_nchan; j++)
+ tty_register_device(cy_serial_driver, j, NULL);
+ cy_next_channel += cy_isa_nchan;
+ }
+ return nboard;
+#else
+ return 0;
+#endif /* CONFIG_ISA */
+} /* cy_detect_isa */
+
+#ifdef CONFIG_PCI
+static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
+{
+ unsigned int a;
+
+ for (a = 0; a < size && *str; a++, str++)
+ if (*str & 0x80)
+ return -EINVAL;
+
+ for (; a < size; a++, str++)
+ if (*str)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
+ unsigned int size)
+{
+ for (; size > 0; size--) {
+ cy_writel(fpga, *data++);
+ udelay(10);
+ }
+}
+
+static void __devinit plx_init(struct pci_dev *pdev, int irq,
+ struct RUNTIME_9060 __iomem *addr)
+{
+ /* Reset PLX */
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
+ udelay(100L);
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
+
+ /* Reload Config. Registers from EEPROM */
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
+ udelay(100L);
+ cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
+
+ /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
+ * the IRQ is lost and, thus, we have to re-write it to the PCI config.
+ * registers. This will remain here until we find a permanent fix.
+ */
+ pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
+}
+
+static int __devinit __cyz_load_fw(const struct firmware *fw,
+ const char *name, const u32 mailbox, void __iomem *base,
+ void __iomem *fpga)
+{
+ const void *ptr = fw->data;
+ const struct zfile_header *h = ptr;
+ const struct zfile_config *c, *cs;
+ const struct zfile_block *b, *bs;
+ unsigned int a, tmp, len = fw->size;
+#define BAD_FW KERN_ERR "Bad firmware: "
+ if (len < sizeof(*h)) {
+ printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
+ return -EINVAL;
+ }
+
+ cs = ptr + h->config_offset;
+ bs = ptr + h->block_offset;
+
+ if ((void *)(cs + h->n_config) > ptr + len ||
+ (void *)(bs + h->n_blocks) > ptr + len) {
+ printk(BAD_FW "too short");
+ return -EINVAL;
+ }
+
+ if (cyc_isfwstr(h->name, sizeof(h->name)) ||
+ cyc_isfwstr(h->date, sizeof(h->date))) {
+ printk(BAD_FW "bad formatted header string\n");
+ return -EINVAL;
+ }
+
+ if (strncmp(name, h->name, sizeof(h->name))) {
+ printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
+ return -EINVAL;
+ }
+
+ tmp = 0;
+ for (c = cs; c < cs + h->n_config; c++) {
+ for (a = 0; a < c->n_blocks; a++)
+ if (c->block_list[a] > h->n_blocks) {
+ printk(BAD_FW "bad block ref number in cfgs\n");
+ return -EINVAL;
+ }
+ if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
+ tmp++;
+ }
+ if (!tmp) {
+ printk(BAD_FW "nothing appropriate\n");
+ return -EINVAL;
+ }
+
+ for (b = bs; b < bs + h->n_blocks; b++)
+ if (b->file_offset + b->size > len) {
+ printk(BAD_FW "bad block data offset\n");
+ return -EINVAL;
+ }
+
+ /* everything is OK, let's seek'n'load it */
+ for (c = cs; c < cs + h->n_config; c++)
+ if (c->mailbox == mailbox && c->function == 0)
+ break;
+
+ for (a = 0; a < c->n_blocks; a++) {
+ b = &bs[c->block_list[a]];
+ if (b->type == ZBLOCK_FPGA) {
+ if (fpga != NULL)
+ cyz_fpga_copy(fpga, ptr + b->file_offset,
+ b->size);
+ } else {
+ if (base != NULL)
+ memcpy_toio(base + b->ram_offset,
+ ptr + b->file_offset, b->size);
+ }
+ }
+#undef BAD_FW
+ return 0;
+}
+
+static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
+ struct RUNTIME_9060 __iomem *ctl_addr, int irq)
+{
+ const struct firmware *fw;
+ struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
+ struct CUSTOM_REG __iomem *cust = base_addr;
+ struct ZFW_CTRL __iomem *pt_zfwctrl;
+ void __iomem *tmp;
+ u32 mailbox, status, nchan;
+ unsigned int i;
+ int retval;
+
+ retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
+ if (retval) {
+ dev_err(&pdev->dev, "can't get firmware\n");
+ goto err;
+ }
+
+ /* Check whether the firmware is already loaded and running. If
+ positive, skip this board */
+ if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
+ u32 cntval = readl(base_addr + 0x190);
+
+ udelay(100);
+ if (cntval != readl(base_addr + 0x190)) {
+ /* FW counter is working, FW is running */
+ dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
+ "Skipping board.\n");
+ retval = 0;
+ goto err_rel;
+ }
+ }
+
+ /* start boot */
+ cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
+ ~0x00030800UL);
+
+ mailbox = readl(&ctl_addr->mail_box_0);
+
+ if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
+ /* stops CPU and set window to beginning of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ cy_writel(&cust->cpu_stop, 0);
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ udelay(100);
+ }
+
+ plx_init(pdev, irq, ctl_addr);
+
+ if (mailbox != 0) {
+ /* load FPGA */
+ retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
+ base_addr);
+ if (retval)
+ goto err_rel;
+ if (!__cyz_fpga_loaded(ctl_addr)) {
+ dev_err(&pdev->dev, "fw upload successful, but fw is "
+ "not loaded\n");
+ goto err_rel;
+ }
+ }
+
+ /* stops CPU and set window to beginning of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ cy_writel(&cust->cpu_stop, 0);
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ udelay(100);
+
+ /* clear memory */
+ for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
+ cy_writeb(tmp, 255);
+ if (mailbox != 0) {
+ /* set window to last 512K of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
+ for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
+ cy_writeb(tmp, 255);
+ /* set window to beginning of RAM */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ }
+
+ retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
+ release_firmware(fw);
+ if (retval)
+ goto err;
+
+ /* finish boot and start boards */
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ cy_writel(&cust->cpu_start, 0);
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ i = 0;
+ while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
+ msleep(100);
+ if (status != ZFIRM_ID) {
+ if (status == ZFIRM_HLT) {
+ dev_err(&pdev->dev, "you need an external power supply "
+ "for this number of ports. Firmware halted and "
+ "board reset.\n");
+ retval = -EIO;
+ goto err;
+ }
+ dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
+ "some more time\n", status);
+ while ((status = readl(&fid->signature)) != ZFIRM_ID &&
+ i++ < 200)
+ msleep(100);
+ if (status != ZFIRM_ID) {
+ dev_err(&pdev->dev, "Board not started in 20 seconds! "
+ "Giving up. (fid->signature = 0x%x)\n",
+ status);
+ dev_info(&pdev->dev, "*** Warning ***: if you are "
+ "upgrading the FW, please power cycle the "
+ "system before loading the new FW to the "
+ "Cyclades-Z.\n");
+
+ if (__cyz_fpga_loaded(ctl_addr))
+ plx_init(pdev, irq, ctl_addr);
+
+ retval = -EIO;
+ goto err;
+ }
+ dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
+ i / 10);
+ }
+ pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
+
+ dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
+ base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
+ base_addr + readl(&fid->zfwctrl_addr));
+
+ nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
+ dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
+ readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
+
+ if (nchan == 0) {
+ dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
+ "check the connection between the Z host card and the "
+ "serial expanders.\n");
+
+ if (__cyz_fpga_loaded(ctl_addr))
+ plx_init(pdev, irq, ctl_addr);
+
+ dev_info(&pdev->dev, "Null number of ports detected. Board "
+ "reset.\n");
+ retval = 0;
+ goto err;
+ }
+
+ cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
+ cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
+
+ /*
+ Early firmware failed to start looking for commands.
+ This enables firmware interrupts for those commands.
+ */
+ cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
+ (1 << 17));
+ cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
+ 0x00030800UL);
+
+ return nchan;
+err_rel:
+ release_firmware(fw);
+err:
+ return retval;
+}
+
+static int __devinit cy_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ void __iomem *addr0 = NULL, *addr2 = NULL;
+ char *card_name = NULL;
+ u32 uninitialized_var(mailbox);
+ unsigned int device_id, nchan = 0, card_no, i;
+ unsigned char plx_ver;
+ int retval, irq;
+
+ retval = pci_enable_device(pdev);
+ if (retval) {
+ dev_err(&pdev->dev, "cannot enable device\n");
+ goto err;
+ }
+
+ /* read PCI configuration area */
+ irq = pdev->irq;
+ device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
+
+#if defined(__alpha__)
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
+ dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
+ "addresses on Alpha systems.\n");
+ retval = -EIO;
+ goto err_dis;
+ }
+#endif
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
+ dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
+ "addresses\n");
+ retval = -EIO;
+ goto err_dis;
+ }
+
+ if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
+ dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
+ "it...\n");
+ pdev->resource[2].flags &= ~IORESOURCE_IO;
+ }
+
+ retval = pci_request_regions(pdev, "cyclades");
+ if (retval) {
+ dev_err(&pdev->dev, "failed to reserve resources\n");
+ goto err_dis;
+ }
+
+ retval = -EIO;
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+ device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+ card_name = "Cyclom-Y";
+
+ addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+ CyPCI_Yctl);
+ if (addr0 == NULL) {
+ dev_err(&pdev->dev, "can't remap ctl region\n");
+ goto err_reg;
+ }
+ addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+ CyPCI_Ywin);
+ if (addr2 == NULL) {
+ dev_err(&pdev->dev, "can't remap base region\n");
+ goto err_unmap;
+ }
+
+ nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
+ if (nchan == 0) {
+ dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
+ "Serial-Modules\n");
+ goto err_unmap;
+ }
+ } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
+ struct RUNTIME_9060 __iomem *ctl_addr;
+
+ ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+ CyPCI_Zctl);
+ if (addr0 == NULL) {
+ dev_err(&pdev->dev, "can't remap ctl region\n");
+ goto err_reg;
+ }
+
+ /* Disable interrupts on the PLX before resetting it */
+ cy_writew(&ctl_addr->intr_ctrl_stat,
+ readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
+
+ plx_init(pdev, irq, addr0);
+
+ mailbox = readl(&ctl_addr->mail_box_0);
+
+ addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+ mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
+ if (addr2 == NULL) {
+ dev_err(&pdev->dev, "can't remap base region\n");
+ goto err_unmap;
+ }
+
+ if (mailbox == ZE_V1) {
+ card_name = "Cyclades-Ze";
+ } else {
+ card_name = "Cyclades-8Zo";
+#ifdef CY_PCI_DEBUG
+ if (mailbox == ZO_V1) {
+ cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+ dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
+ "id %lx, ver %lx\n", (ulong)(0xff &
+ readl(&((struct CUSTOM_REG *)addr2)->
+ fpga_id)), (ulong)(0xff &
+ readl(&((struct CUSTOM_REG *)addr2)->
+ fpga_version)));
+ cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+ } else {
+ dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
+ "Cyclades-Z board. FPGA not loaded\n");
+ }
+#endif
+ /* The following clears the firmware id word. This
+ ensures that the driver will not attempt to talk to
+ the board until it has been properly initialized.
+ */
+ if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
+ cy_writel(addr2 + ID_ADDRESS, 0L);
+ }
+
+ retval = cyz_load_fw(pdev, addr2, addr0, irq);
+ if (retval <= 0)
+ goto err_unmap;
+ nchan = retval;
+ }
+
+ if ((cy_next_channel + nchan) > NR_PORTS) {
+ dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
+ "channels are available. Change NR_PORTS in "
+ "cyclades.c and recompile kernel.\n");
+ goto err_unmap;
+ }
+ /* fill the next cy_card structure available */
+ for (card_no = 0; card_no < NR_CARDS; card_no++) {
+ if (cy_card[card_no].base_addr == NULL)
+ break;
+ }
+ if (card_no == NR_CARDS) { /* no more cy_cards available */
+ dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
+ "more cards can be used. Change NR_CARDS in "
+ "cyclades.c and recompile kernel.\n");
+ goto err_unmap;
+ }
+
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+ device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+ /* allocate IRQ */
+ retval = request_irq(irq, cyy_interrupt,
+ IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
+ if (retval) {
+ dev_err(&pdev->dev, "could not allocate IRQ\n");
+ goto err_unmap;
+ }
+ cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
+ } else {
+ struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
+ struct ZFW_CTRL __iomem *zfw_ctrl;
+
+ zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
+
+ cy_card[card_no].hw_ver = mailbox;
+ cy_card[card_no].num_chips = (unsigned int)-1;
+ cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl;
+#ifdef CONFIG_CYZ_INTR
+ /* allocate IRQ only if board has an IRQ */
+ if (irq != 0 && irq != 255) {
+ retval = request_irq(irq, cyz_interrupt,
+ IRQF_SHARED, "Cyclades-Z",
+ &cy_card[card_no]);
+ if (retval) {
+ dev_err(&pdev->dev, "could not allocate IRQ\n");
+ goto err_unmap;
+ }
+ }
+#endif /* CONFIG_CYZ_INTR */
+ }
+
+ /* set cy_card */
+ cy_card[card_no].base_addr = addr2;
+ cy_card[card_no].ctl_addr.p9050 = addr0;
+ cy_card[card_no].irq = irq;
+ cy_card[card_no].bus_index = 1;
+ cy_card[card_no].first_line = cy_next_channel;
+ cy_card[card_no].nports = nchan;
+ retval = cy_init_card(&cy_card[card_no]);
+ if (retval)
+ goto err_null;
+
+ pci_set_drvdata(pdev, &cy_card[card_no]);
+
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+ device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+ /* enable interrupts in the PCI interface */
+ plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
+ switch (plx_ver) {
+ case PLX_9050:
+ cy_writeb(addr0 + 0x4c, 0x43);
+ break;
+
+ case PLX_9060:
+ case PLX_9080:
+ default: /* Old boards, use PLX_9060 */
+ {
+ struct RUNTIME_9060 __iomem *ctl_addr = addr0;
+ plx_init(pdev, irq, ctl_addr);
+ cy_writew(&ctl_addr->intr_ctrl_stat,
+ readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
+ break;
+ }
+ }
+ }
+
+ dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
+ "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
+ for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
+ tty_register_device(cy_serial_driver, i, &pdev->dev);
+ cy_next_channel += nchan;
+
+ return 0;
+err_null:
+ cy_card[card_no].base_addr = NULL;
+ free_irq(irq, &cy_card[card_no]);
+err_unmap:
+ iounmap(addr0);
+ if (addr2)
+ iounmap(addr2);
+err_reg:
+ pci_release_regions(pdev);
+err_dis:
+ pci_disable_device(pdev);
+err:
+ return retval;
+}
+
+static void __devexit cy_pci_remove(struct pci_dev *pdev)
+{
+ struct cyclades_card *cinfo = pci_get_drvdata(pdev);
+ unsigned int i;
+
+ /* non-Z with old PLX */
+ if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
+ PLX_9050)
+ cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
+ else
+#ifndef CONFIG_CYZ_INTR
+ if (!cy_is_Z(cinfo))
+#endif
+ cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
+ readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
+ ~0x0900);
+
+ iounmap(cinfo->base_addr);
+ if (cinfo->ctl_addr.p9050)
+ iounmap(cinfo->ctl_addr.p9050);
+ if (cinfo->irq
+#ifndef CONFIG_CYZ_INTR
+ && !cy_is_Z(cinfo)
+#endif /* CONFIG_CYZ_INTR */
+ )
+ free_irq(cinfo->irq, cinfo);
+ pci_release_regions(pdev);
+
+ cinfo->base_addr = NULL;
+ for (i = cinfo->first_line; i < cinfo->first_line +
+ cinfo->nports; i++)
+ tty_unregister_device(cy_serial_driver, i);
+ cinfo->nports = 0;
+ kfree(cinfo->ports);
+}
+
+static struct pci_driver cy_pci_driver = {
+ .name = "cyclades",
+ .id_table = cy_pci_dev_id,
+ .probe = cy_pci_probe,
+ .remove = __devexit_p(cy_pci_remove)
+};
+#endif
+
+static int cyclades_proc_show(struct seq_file *m, void *v)
+{
+ struct cyclades_port *info;
+ unsigned int i, j;
+ __u32 cur_jifs = jiffies;
+
+ seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
+ "IdleIn Overruns Ldisc\n");
+
+ /* Output one line for each known port */
+ for (i = 0; i < NR_CARDS; i++)
+ for (j = 0; j < cy_card[i].nports; j++) {
+ info = &cy_card[i].ports[j];
+
+ if (info->port.count) {
+ /* XXX is the ldisc num worth this? */
+ struct tty_struct *tty;
+ struct tty_ldisc *ld;
+ int num = 0;
+ tty = tty_port_tty_get(&info->port);
+ if (tty) {
+ ld = tty_ldisc_ref(tty);
+ if (ld) {
+ num = ld->ops->num;
+ tty_ldisc_deref(ld);
+ }
+ tty_kref_put(tty);
+ }
+ seq_printf(m, "%3d %8lu %10lu %8lu "
+ "%10lu %8lu %9lu %6d\n", info->line,
+ (cur_jifs - info->idle_stats.in_use) /
+ HZ, info->idle_stats.xmit_bytes,
+ (cur_jifs - info->idle_stats.xmit_idle)/
+ HZ, info->idle_stats.recv_bytes,
+ (cur_jifs - info->idle_stats.recv_idle)/
+ HZ, info->idle_stats.overruns,
+ num);
+ } else
+ seq_printf(m, "%3d %8lu %10lu %8lu "
+ "%10lu %8lu %9lu %6ld\n",
+ info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
+ }
+ return 0;
+}
+
+static int cyclades_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cyclades_proc_show, NULL);
+}
+
+static const struct file_operations cyclades_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = cyclades_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* The serial driver boot-time initialization code!
+ Hardware I/O ports are mapped to character special devices on a
+ first found, first allocated manner. That is, this code searches
+ for Cyclom cards in the system. As each is found, it is probed
+ to discover how many chips (and thus how many ports) are present.
+ These ports are mapped to the tty ports 32 and upward in monotonic
+ fashion. If an 8-port card is replaced with a 16-port card, the
+ port mapping on a following card will shift.
+
+ This approach is different from what is used in the other serial
+ device driver because the Cyclom is more properly a multiplexer,
+ not just an aggregation of serial ports on one card.
+
+ If there are more cards with more ports than have been
+ statically allocated above, a warning is printed and the
+ extra ports are ignored.
+ */
+
+static const struct tty_operations cy_ops = {
+ .open = cy_open,
+ .close = cy_close,
+ .write = cy_write,
+ .put_char = cy_put_char,
+ .flush_chars = cy_flush_chars,
+ .write_room = cy_write_room,
+ .chars_in_buffer = cy_chars_in_buffer,
+ .flush_buffer = cy_flush_buffer,
+ .ioctl = cy_ioctl,
+ .throttle = cy_throttle,
+ .unthrottle = cy_unthrottle,
+ .set_termios = cy_set_termios,
+ .stop = cy_stop,
+ .start = cy_start,
+ .hangup = cy_hangup,
+ .break_ctl = cy_break,
+ .wait_until_sent = cy_wait_until_sent,
+ .tiocmget = cy_tiocmget,
+ .tiocmset = cy_tiocmset,
+ .get_icount = cy_get_icount,
+ .proc_fops = &cyclades_proc_fops,
+};
+
+static int __init cy_init(void)
+{
+ unsigned int nboards;
+ int retval = -ENOMEM;
+
+ cy_serial_driver = alloc_tty_driver(NR_PORTS);
+ if (!cy_serial_driver)
+ goto err;
+
+ printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
+ __DATE__, __TIME__);
+
+ /* Initialize the tty_driver structure */
+
+ cy_serial_driver->owner = THIS_MODULE;
+ cy_serial_driver->driver_name = "cyclades";
+ cy_serial_driver->name = "ttyC";
+ cy_serial_driver->major = CYCLADES_MAJOR;
+ cy_serial_driver->minor_start = 0;
+ cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
+ cy_serial_driver->init_termios = tty_std_termios;
+ cy_serial_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ tty_set_operations(cy_serial_driver, &cy_ops);
+
+ retval = tty_register_driver(cy_serial_driver);
+ if (retval) {
+ printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
+ goto err_frtty;
+ }
+
+ /* the code below is responsible to find the boards. Each different
+ type of board has its own detection routine. If a board is found,
+ the next cy_card structure available is set by the detection
+ routine. These functions are responsible for checking the
+ availability of cy_card and cy_port data structures and updating
+ the cy_next_channel. */
+
+ /* look for isa boards */
+ nboards = cy_detect_isa();
+
+#ifdef CONFIG_PCI
+ /* look for pci boards */
+ retval = pci_register_driver(&cy_pci_driver);
+ if (retval && !nboards) {
+ tty_unregister_driver(cy_serial_driver);
+ goto err_frtty;
+ }
+#endif
+
+ return 0;
+err_frtty:
+ put_tty_driver(cy_serial_driver);
+err:
+ return retval;
+} /* cy_init */
+
+static void __exit cy_cleanup_module(void)
+{
+ struct cyclades_card *card;
+ unsigned int i, e1;
+
+#ifndef CONFIG_CYZ_INTR
+ del_timer_sync(&cyz_timerlist);
+#endif /* CONFIG_CYZ_INTR */
+
+ e1 = tty_unregister_driver(cy_serial_driver);
+ if (e1)
+ printk(KERN_ERR "failed to unregister Cyclades serial "
+ "driver(%d)\n", e1);
+
+#ifdef CONFIG_PCI
+ pci_unregister_driver(&cy_pci_driver);
+#endif
+
+ for (i = 0; i < NR_CARDS; i++) {
+ card = &cy_card[i];
+ if (card->base_addr) {
+ /* clear interrupt */
+ cy_writeb(card->base_addr + Cy_ClrIntr, 0);
+ iounmap(card->base_addr);
+ if (card->ctl_addr.p9050)
+ iounmap(card->ctl_addr.p9050);
+ if (card->irq
+#ifndef CONFIG_CYZ_INTR
+ && !cy_is_Z(card)
+#endif /* CONFIG_CYZ_INTR */
+ )
+ free_irq(card->irq, card);
+ for (e1 = card->first_line; e1 < card->first_line +
+ card->nports; e1++)
+ tty_unregister_device(cy_serial_driver, e1);
+ kfree(card->ports);
+ }
+ }
+
+ put_tty_driver(cy_serial_driver);
+} /* cy_cleanup_module */
+
+module_init(cy_init);
+module_exit(cy_cleanup_module);
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(CY_VERSION);
+MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
+MODULE_FIRMWARE("cyzfirm.bin");