| // SPDX-License-Identifier: GPL-2.0 |
| #undef BLOCKMOVE |
| #define Z_WAKE |
| #undef Z_EXT_CHARS_IN_BUFFER |
| |
| /* |
| * 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_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 |
| |
| /* 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_hw_array(maddr, long, iomem, NULL, 0); |
| module_param_hw_array(irq, int, irq, 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(struct timer_list *); |
| |
| /* 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); |
| |
| #else /* CONFIG_CYZ_INTR */ |
| static void cyz_rx_restart(struct timer_list *); |
| #endif /* CONFIG_CYZ_INTR */ |
| |
| static 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 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 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 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_port *port; |
| 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]; |
| port = &info->port; |
| save_car = cyy_readb(info, CyCAR); |
| cyy_writeb(info, CyCAR, save_xir); |
| ivr = cyy_readb(info, CyRIVR) & CyIVRMask; |
| |
| /* 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++; |
| return; |
| } |
| if (tty_buffer_request_room(port, 1)) { |
| if (data & info->read_status_mask) { |
| if (data & CyBREAK) { |
| tty_insert_flip_char(port, |
| cyy_readb(info, CyRDSR), |
| TTY_BREAK); |
| info->icount.rx++; |
| if (port->flags & ASYNC_SAK) { |
| struct tty_struct *tty = |
| tty_port_tty_get(port); |
| if (tty) { |
| do_SAK(tty); |
| tty_kref_put(tty); |
| } |
| } |
| } else if (data & CyFRAME) { |
| tty_insert_flip_char(port, |
| 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(port, |
| cyy_readb(info, CyRDSR), |
| TTY_PARITY); |
| info->icount.rx++; |
| info->idle_stats.parity_errs++; |
| } else if (data & CyOVERRUN) { |
| tty_insert_flip_char(port, 0, |
| TTY_OVERRUN); |
| info->icount.rx++; |
| /* If the flip buffer itself is |
| overflowing, we still lose |
| the next incoming character. |
| */ |
| tty_insert_flip_char(port, |
| 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(port, 0, |
| TTY_NORMAL); |
| info->icount.rx++; |
| } |
| } else { |
| tty_insert_flip_char(port, 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(port, char_count); |
| while (len--) { |
| data = cyy_readb(info, CyRDSR); |
| tty_insert_flip_char(port, 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(port); |
| |
| /* 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) && tty_port_check_carrier(&info->port)) { |
| if (mdm_status & CyDCD) |
| wake_up_interruptible(&info->port.open_wait); |
| else |
| tty_hangup(tty); |
| } |
| if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) { |
| 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 BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl; |
| struct cyclades_card *cinfo = info->card; |
| struct tty_port *port = &info->port; |
| 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) |
| return; |
| |
| #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 |
| |
| #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(port, &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(port, 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(port, 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(&info->rx_full_timer)) |
| mod_timer(&info->rx_full_timer, jiffies + 1); |
| #endif |
| info->idle_stats.recv_idle = jiffies; |
| tty_schedule_flip(&info->port); |
| |
| /* Update rx_get */ |
| cy_writel(&buf_ctrl->rx_get, new_rx_get); |
| } |
| |
| static void cyz_handle_tx(struct cyclades_port *info) |
| { |
| struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl; |
| struct cyclades_card *cinfo = info->card; |
| struct tty_struct *tty; |
| 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) |
| return; |
| |
| tty = tty_port_tty_get(&info->port); |
| 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); |
| tty_kref_put(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 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, ¶m) == 1) { |
| special_count = 0; |
| delta_count = 0; |
| info = &cinfo->ports[channel]; |
| |
| switch (cmd) { |
| case C_CM_PR_ERROR: |
| tty_insert_flip_char(&info->port, 0, TTY_PARITY); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_FR_ERROR: |
| tty_insert_flip_char(&info->port, 0, TTY_FRAME); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_RXBRK: |
| tty_insert_flip_char(&info->port, 0, TTY_BREAK); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_MDCD: |
| info->icount.dcd++; |
| delta_count++; |
| if (tty_port_check_carrier(&info->port)) { |
| 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_port_tty_hangup(&info->port, false); |
| } |
| 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); |
| 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); |
| 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(&info->port); |
| } |
| } |
| |
| #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(struct timer_list *t) |
| { |
| struct cyclades_port *info = from_timer(info, t, rx_full_timer); |
| 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(struct timer_list *unused) |
| { |
| 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++) { |
| info = &cinfo->ports[port]; |
| |
| if (!info->throttle) |
| cyz_handle_rx(info); |
| cyz_handle_tx(info); |
| } |
| /* 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 (tty_port_initialized(&info->port)) |
| 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 !!! */ |
| } |
| |
| tty_port_set_initialized(&info->port, 1); |
| |
| 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; |
| |
| if (!tty_port_initialized(&info->port)) |
| return; |
| |
| card = info->card; |
| 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 (C_HUPCL(tty)) |
| 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); |
| tty_port_set_initialized(&info->port, 0); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } else { |
| #ifdef CY_DEBUG_OPEN |
| int channel = info->line - card->first_line; |
| 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 (C_HUPCL(tty)) |
| tty_port_lower_dtr_rts(&info->port); |
| |
| set_bit(TTY_IO_ERROR, &tty->flags); |
| tty_port_set_initialized(&info->port, 0); |
| |
| 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 = tty->index; |
| int retval; |
| |
| 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 |
| |
| /* |
| * 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; |
| |
| card = info->card; |
| if (!cy_is_Z(card)) { |
| while (cyy_readb(info, CySRER) & CyTxRdy) { |
| 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)); |
| } |
| |
| 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 (tty_port_initialized(&info->port)) { |
| /* 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 (info->line == -1) |
| return; |
| |
| cflag = tty->termios.c_cflag; |
| iflag = tty->termios.c_iflag; |
| |
| 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 */ |
| tty_port_set_cts_flow(&info->port, cflag & CRTSCTS); |
| if (cflag & CRTSCTS) |
| info->cor2 |= CyCtsAE; |
| else |
| info->cor2 &= ~CyCtsAE; |
| tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL); |
| |
| /*********************************************** |
| 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 */ |
| tty_port_set_cts_flow(&info->port, 0); |
| |
| /* 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 */ |
| tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL); |
| |
| 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 tty_struct *tty, |
| struct serial_struct *ss) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *cinfo = info->card; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_ioctl")) |
| return -ENODEV; |
| ss->type = info->type; |
| ss->line = info->line; |
| ss->port = (info->card - cy_card) * 0x100 + info->line - |
| cinfo->first_line; |
| ss->irq = cinfo->irq; |
| ss->flags = info->port.flags; |
| ss->close_delay = info->port.close_delay; |
| ss->closing_wait = info->port.closing_wait; |
| ss->baud_base = info->baud; |
| ss->custom_divisor = info->custom_divisor; |
| return 0; |
| } |
| |
| static int cy_set_serial_info(struct tty_struct *tty, |
| struct serial_struct *ss) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| int old_flags; |
| int ret; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_ioctl")) |
| return -ENODEV; |
| |
| mutex_lock(&info->port.mutex); |
| |
| old_flags = info->port.flags; |
| |
| if (!capable(CAP_SYS_ADMIN)) { |
| if (ss->close_delay != info->port.close_delay || |
| ss->baud_base != info->baud || |
| (ss->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) | |
| (ss->flags & ASYNC_USR_MASK); |
| info->baud = ss->baud_base; |
| info->custom_divisor = ss->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 = ss->baud_base; |
| info->custom_divisor = ss->custom_divisor; |
| info->port.flags = (info->port.flags & ~ASYNC_FLAGS) | |
| (ss->flags & ASYNC_FLAGS); |
| info->port.close_delay = ss->close_delay * HZ / 100; |
| info->port.closing_wait = ss->closing_wait * HZ / 100; |
| |
| check_and_exit: |
| if (tty_port_initialized(&info->port)) { |
| if ((ss->flags ^ old_flags) & ASYNC_SPD_MASK) { |
| /* warn about deprecation unless clearing */ |
| if (ss->flags & ASYNC_SPD_MASK) |
| dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n"); |
| } |
| 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, 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: |
| if (arg > LONG_MAX / HZ) |
| return -ENODEV; |
| 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 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) && !C_CRTSCTS(tty)) { |
| 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) && C_CLOCAL(tty)) |
| 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 |
| printk(KERN_DEBUG "cyc:throttle %s ...ttyC%d\n", tty_name(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 (C_CRTSCTS(tty)) { |
| 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 |
| printk(KERN_DEBUG "cyc:unthrottle %s ...ttyC%d\n", |
| tty_name(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 (C_CRTSCTS(tty)) { |
| 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) |
|