diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_core.c')
-rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 493 |
1 files changed, 328 insertions, 165 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index deae122..422ebea 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -31,7 +31,6 @@ #include <linux/tty.h> #include <linux/ratelimit.h> #include <linux/tty_flip.h> -#include <linux/serial_core.h> #include <linux/serial.h> #include <linux/serial_8250.h> #include <linux/nmi.h> @@ -61,7 +60,7 @@ static struct uart_driver serial8250_reg; static int serial_index(struct uart_port *port) { - return (serial8250_reg.minor - 64) + port->line; + return port->minor - 64; } static unsigned int skip_txen_test; /* force skip of txen test at init time */ @@ -358,34 +357,46 @@ static void default_serial_dl_write(struct uart_8250_port *up, int value) #if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X) /* Au1x00/RT288x UART hardware has a weird register layout */ -static const u8 au_io_in_map[] = { - [UART_RX] = 0, - [UART_IER] = 2, - [UART_IIR] = 3, - [UART_LCR] = 5, - [UART_MCR] = 6, - [UART_LSR] = 7, - [UART_MSR] = 8, +static const s8 au_io_in_map[8] = { + 0, /* UART_RX */ + 2, /* UART_IER */ + 3, /* UART_IIR */ + 5, /* UART_LCR */ + 6, /* UART_MCR */ + 7, /* UART_LSR */ + 8, /* UART_MSR */ + -1, /* UART_SCR (unmapped) */ }; -static const u8 au_io_out_map[] = { - [UART_TX] = 1, - [UART_IER] = 2, - [UART_FCR] = 4, - [UART_LCR] = 5, - [UART_MCR] = 6, +static const s8 au_io_out_map[8] = { + 1, /* UART_TX */ + 2, /* UART_IER */ + 4, /* UART_FCR */ + 5, /* UART_LCR */ + 6, /* UART_MCR */ + -1, /* UART_LSR (unmapped) */ + -1, /* UART_MSR (unmapped) */ + -1, /* UART_SCR (unmapped) */ }; static unsigned int au_serial_in(struct uart_port *p, int offset) { - offset = au_io_in_map[offset] << p->regshift; - return __raw_readl(p->membase + offset); + if (offset >= ARRAY_SIZE(au_io_in_map)) + return UINT_MAX; + offset = au_io_in_map[offset]; + if (offset < 0) + return UINT_MAX; + return __raw_readl(p->membase + (offset << p->regshift)); } static void au_serial_out(struct uart_port *p, int offset, int value) { - offset = au_io_out_map[offset] << p->regshift; - __raw_writel(value, p->membase + offset); + if (offset >= ARRAY_SIZE(au_io_out_map)) + return; + offset = au_io_out_map[offset]; + if (offset < 0) + return; + __raw_writel(value, p->membase + (offset << p->regshift)); } /* Au1x00 haven't got a standard divisor latch */ @@ -895,7 +906,7 @@ static int broken_efr(struct uart_8250_port *up) /* * Exar ST16C2550 "A2" devices incorrectly detect as * having an EFR, and report an ID of 0x0201. See - * http://linux.derkeiler.com/Mailing-Lists/Kernel/2004-11/4812.html + * http://linux.derkeiler.com/Mailing-Lists/Kernel/2004-11/4812.html */ if (autoconfig_read_divisor_id(up) == 0x0201 && size_fifo(up) == 16) return 1; @@ -903,23 +914,6 @@ static int broken_efr(struct uart_8250_port *up) return 0; } -static inline int ns16550a_goto_highspeed(struct uart_8250_port *up) -{ - unsigned char status; - - status = serial_in(up, 0x04); /* EXCR2 */ -#define PRESL(x) ((x) & 0x30) - if (PRESL(status) == 0x10) { - /* already in high speed mode */ - return 0; - } else { - status &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */ - status |= 0x10; /* 1.625 divisor for baud_base --> 921600 */ - serial_out(up, 0x04, status); - } - return 1; -} - /* * We know that the chip has FIFOs. Does it have an EFR? The * EFR is located in the same register position as the IIR and @@ -1122,7 +1116,7 @@ static void autoconfig_16550a(struct uart_8250_port *up) * whether or not this UART is a 16550A or not, since this will * determine whether or not we can use its FIFO features or not. */ -static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) +static void autoconfig(struct uart_8250_port *up) { unsigned char status1, scratch, scratch2, scratch3; unsigned char save_lcr, save_mcr; @@ -1245,22 +1239,15 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) /* * Only probe for RSA ports if we got the region. */ - if (port->type == PORT_16550A && probeflags & PROBE_RSA) { - int i; - - for (i = 0 ; i < probe_rsa_count; ++i) { - if (probe_rsa[i] == port->iobase && __enable_rsa(up)) { - port->type = PORT_RSA; - break; - } - } - } + if (port->type == PORT_16550A && up->probe & UART_PROBE_RSA && + __enable_rsa(up)) + port->type = PORT_RSA; #endif serial_out(up, UART_LCR, save_lcr); port->fifosize = uart_config[up->port.type].fifo_size; - old_capabilities = up->capabilities; + old_capabilities = up->capabilities; up->capabilities = uart_config[port->type].flags; up->tx_loadsz = uart_config[port->type].tx_loadsz; @@ -1907,6 +1894,48 @@ static void serial8250_backup_timeout(unsigned long data) jiffies + uart_poll_timeout(&up->port) + HZ / 5); } +static int univ8250_setup_irq(struct uart_8250_port *up) +{ + struct uart_port *port = &up->port; + int retval = 0; + + /* + * The above check will only give an accurate result the first time + * the port is opened so this value needs to be preserved. + */ + if (up->bugs & UART_BUG_THRE) { + pr_debug("ttyS%d - using backup timer\n", serial_index(port)); + + up->timer.function = serial8250_backup_timeout; + up->timer.data = (unsigned long)up; + mod_timer(&up->timer, jiffies + + uart_poll_timeout(port) + HZ / 5); + } + + /* + * If the "interrupt" for this port doesn't correspond with any + * hardware interrupt, we use a timer-based system. The original + * driver used to do this with IRQ0. + */ + if (!port->irq) { + up->timer.data = (unsigned long)up; + mod_timer(&up->timer, jiffies + uart_poll_timeout(port)); + } else + retval = serial_link_irq_chain(up); + + return retval; +} + +static void univ8250_release_irq(struct uart_8250_port *up) +{ + struct uart_port *port = &up->port; + + del_timer_sync(&up->timer); + up->timer.function = serial8250_timeout; + if (port->irq) + serial_unlink_irq_chain(up); +} + static unsigned int serial8250_tx_empty(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); @@ -2211,35 +2240,12 @@ int serial8250_do_startup(struct uart_port *port) if ((!(iir1 & UART_IIR_NO_INT) && (iir & UART_IIR_NO_INT)) || up->port.flags & UPF_BUG_THRE) { up->bugs |= UART_BUG_THRE; - pr_debug("ttyS%d - using backup timer\n", - serial_index(port)); } } - /* - * The above check will only give an accurate result the first time - * the port is opened so this value needs to be preserved. - */ - if (up->bugs & UART_BUG_THRE) { - up->timer.function = serial8250_backup_timeout; - up->timer.data = (unsigned long)up; - mod_timer(&up->timer, jiffies + - uart_poll_timeout(port) + HZ / 5); - } - - /* - * If the "interrupt" for this port doesn't correspond with any - * hardware interrupt, we use a timer-based system. The original - * driver used to do this with IRQ0. - */ - if (!port->irq) { - up->timer.data = (unsigned long)up; - mod_timer(&up->timer, jiffies + uart_poll_timeout(port)); - } else { - retval = serial_link_irq_chain(up); - if (retval) - goto out; - } + retval = up->ops->setup_irq(up); + if (retval) + goto out; /* * Now, initialize the UART @@ -2270,7 +2276,7 @@ int serial8250_do_startup(struct uart_port *port) is variable. So, let's just don't test if we receive TX irq. This way, we'll never enable UART_BUG_TXEN. */ - if (skip_txen_test || up->port.flags & UPF_NO_TXEN_TEST) + if (up->port.flags & UPF_NO_TXEN_TEST) goto dont_test_tx_en; /* @@ -2397,10 +2403,7 @@ void serial8250_do_shutdown(struct uart_port *port) serial_port_in(port, UART_RX); serial8250_rpm_put(up); - del_timer_sync(&up->timer); - up->timer.function = serial8250_timeout; - if (port->irq) - serial_unlink_irq_chain(up); + up->ops->release_irq(up); } EXPORT_SYMBOL_GPL(serial8250_do_shutdown); @@ -2719,6 +2722,8 @@ serial8250_pm(struct uart_port *port, unsigned int state, static unsigned int serial8250_port_size(struct uart_8250_port *pt) { + if (pt->port.mapsize) + return pt->port.mapsize; if (pt->port.iotype == UPIO_AU) { if (pt->port.type == PORT_RT2880) return 0x100; @@ -2798,6 +2803,7 @@ static void serial8250_release_std_resource(struct uart_8250_port *up) } } +#ifdef CONFIG_SERIAL_8250_RSA static int serial8250_request_rsa_resource(struct uart_8250_port *up) { unsigned long start = UART_RSA_BASE << up->port.regshift; @@ -2832,14 +2838,13 @@ static void serial8250_release_rsa_resource(struct uart_8250_port *up) break; } } +#endif static void serial8250_release_port(struct uart_port *port) { struct uart_8250_port *up = up_to_u8250p(port); serial8250_release_std_resource(up); - if (port->type == PORT_RSA) - serial8250_release_rsa_resource(up); } static int serial8250_request_port(struct uart_port *port) @@ -2851,11 +2856,6 @@ static int serial8250_request_port(struct uart_port *port) return -ENODEV; ret = serial8250_request_std_resource(up); - if (ret == 0 && port->type == PORT_RSA) { - ret = serial8250_request_rsa_resource(up); - if (ret < 0) - serial8250_release_std_resource(up); - } return ret; } @@ -3003,7 +3003,6 @@ static void register_dev_spec_attr_grp(struct uart_8250_port *up) static void serial8250_config_port(struct uart_port *port, int flags) { struct uart_8250_port *up = up_to_u8250p(port); - int probeflags = PROBE_ANY; int ret; if (port->type == PORT_8250_CIR) @@ -3017,15 +3016,11 @@ static void serial8250_config_port(struct uart_port *port, int flags) if (ret < 0) return; - ret = serial8250_request_rsa_resource(up); - if (ret < 0) - probeflags &= ~PROBE_RSA; - if (port->iotype != up->cur_iotype) set_io_from_upio(port); if (flags & UART_CONFIG_TYPE) - autoconfig(up, probeflags); + autoconfig(up); /* if access method is AU, it is a 16550 with a quirk */ if (port->type == PORT_16550A && port->iotype == UPIO_AU) @@ -3038,8 +3033,6 @@ static void serial8250_config_port(struct uart_port *port, int flags) if (port->type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ) autoconfig_irq(up); - if (port->type != PORT_RSA && probeflags & PROBE_RSA) - serial8250_release_rsa_resource(up); if (port->type == PORT_UNKNOWN) serial8250_release_std_resource(up); @@ -3073,7 +3066,7 @@ serial8250_type(struct uart_port *port) return uart_config[type].name; } -static struct uart_ops serial8250_pops = { +static const struct uart_ops serial8250_pops = { .tx_empty = serial8250_tx_empty, .set_mctrl = serial8250_set_mctrl, .get_mctrl = serial8250_get_mctrl, @@ -3100,6 +3093,14 @@ static struct uart_ops serial8250_pops = { #endif }; +static const struct uart_ops *base_ops; +static struct uart_ops univ8250_port_ops; + +static const struct uart_8250_ops univ8250_driver_ops = { + .setup_irq = univ8250_setup_irq, + .release_irq = univ8250_release_irq, +}; + static struct uart_8250_port serial8250_ports[UART_NR]; /** @@ -3130,6 +3131,105 @@ void serial8250_set_isa_configurator( } EXPORT_SYMBOL(serial8250_set_isa_configurator); +static void serial8250_init_port(struct uart_8250_port *up) +{ + struct uart_port *port = &up->port; + + spin_lock_init(&port->lock); + port->ops = &serial8250_pops; + + up->cur_iotype = 0xFF; +} + +static void serial8250_set_defaults(struct uart_8250_port *up) +{ + struct uart_port *port = &up->port; + + if (up->port.flags & UPF_FIXED_TYPE) { + unsigned int type = up->port.type; + + if (!up->port.fifosize) + up->port.fifosize = uart_config[type].fifo_size; + if (!up->tx_loadsz) + up->tx_loadsz = uart_config[type].tx_loadsz; + if (!up->capabilities) + up->capabilities = uart_config[type].flags; + } + + set_io_from_upio(port); + + /* default dma handlers */ + if (up->dma) { + if (!up->dma->tx_dma) + up->dma->tx_dma = serial8250_tx_dma; + if (!up->dma->rx_dma) + up->dma->rx_dma = serial8250_rx_dma; + } +} + +#ifdef CONFIG_SERIAL_8250_RSA + +static void univ8250_config_port(struct uart_port *port, int flags) +{ + struct uart_8250_port *up = up_to_u8250p(port); + + up->probe &= ~UART_PROBE_RSA; + if (port->type == PORT_RSA) { + if (serial8250_request_rsa_resource(up) == 0) + up->probe |= UART_PROBE_RSA; + } else if (flags & UART_CONFIG_TYPE) { + int i; + + for (i = 0; i < probe_rsa_count; i++) { + if (probe_rsa[i] == up->port.iobase) { + if (serial8250_request_rsa_resource(up) == 0) + up->probe |= UART_PROBE_RSA; + break; + } + } + } + + base_ops->config_port(port, flags); + + if (port->type != PORT_RSA && up->probe & UART_PROBE_RSA) + serial8250_release_rsa_resource(up); +} + +static int univ8250_request_port(struct uart_port *port) +{ + struct uart_8250_port *up = up_to_u8250p(port); + int ret; + + ret = base_ops->request_port(port); + if (ret == 0 && port->type == PORT_RSA) { + ret = serial8250_request_rsa_resource(up); + if (ret < 0) + base_ops->release_port(port); + } + + return ret; +} + +static void univ8250_release_port(struct uart_port *port) +{ + struct uart_8250_port *up = up_to_u8250p(port); + + if (port->type == PORT_RSA) + serial8250_release_rsa_resource(up); + base_ops->release_port(port); +} + +static void univ8250_rsa_support(struct uart_ops *ops) +{ + ops->config_port = univ8250_config_port; + ops->request_port = univ8250_request_port; + ops->release_port = univ8250_release_port; +} + +#else +#define univ8250_rsa_support(x) do { } while (0) +#endif /* CONFIG_SERIAL_8250_RSA */ + static void __init serial8250_isa_init_ports(void) { struct uart_8250_port *up; @@ -3148,21 +3248,27 @@ static void __init serial8250_isa_init_ports(void) struct uart_port *port = &up->port; port->line = i; - spin_lock_init(&port->lock); + serial8250_init_port(up); + if (!base_ops) + base_ops = port->ops; + port->ops = &univ8250_port_ops; init_timer(&up->timer); up->timer.function = serial8250_timeout; - up->cur_iotype = 0xFF; + + up->ops = &univ8250_driver_ops; /* * ALPHA_KLUDGE_MCR needs to be killed. */ up->mcr_mask = ~ALPHA_KLUDGE_MCR; up->mcr_force = ALPHA_KLUDGE_MCR; - - port->ops = &serial8250_pops; } + /* chain base port ops to support Remote Supervisor Adapter */ + univ8250_port_ops = *base_ops; + univ8250_rsa_support(&univ8250_port_ops); + if (share_irqs) irqflag = IRQF_SHARED; @@ -3180,26 +3286,14 @@ static void __init serial8250_isa_init_ports(void) port->membase = old_serial_port[i].iomem_base; port->iotype = old_serial_port[i].io_type; port->regshift = old_serial_port[i].iomem_reg_shift; - set_io_from_upio(port); + serial8250_set_defaults(up); + port->irqflags |= irqflag; if (serial8250_isa_config != NULL) serial8250_isa_config(i, &up->port, &up->capabilities); - } } -static void -serial8250_init_fixed_type_port(struct uart_8250_port *up, unsigned int type) -{ - up->port.type = type; - if (!up->port.fifosize) - up->port.fifosize = uart_config[type].fifo_size; - if (!up->tx_loadsz) - up->tx_loadsz = uart_config[type].tx_loadsz; - if (!up->capabilities) - up->capabilities = uart_config[type].flags; -} - static void __init serial8250_register_ports(struct uart_driver *drv, struct device *dev) { @@ -3213,8 +3307,8 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev) up->port.dev = dev; - if (up->port.flags & UPF_FIXED_TYPE) - serial8250_init_fixed_type_port(up, up->port.type); + if (skip_txen_test) + up->port.flags |= UPF_NO_TXEN_TEST; uart_add_one_port(drv, &up->port); } @@ -3236,10 +3330,9 @@ static void serial8250_console_putchar(struct uart_port *port, int ch) * * The console_lock must be held when we get here. */ -static void -serial8250_console_write(struct console *co, const char *s, unsigned int count) +static void serial8250_console_write(struct uart_8250_port *up, const char *s, + unsigned int count) { - struct uart_8250_port *up = &serial8250_ports[co->index]; struct uart_port *port = &up->port; unsigned long flags; unsigned int ier; @@ -3311,14 +3404,51 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count) serial8250_rpm_put(up); } -static int serial8250_console_setup(struct console *co, char *options) +static void univ8250_console_write(struct console *co, const char *s, + unsigned int count) +{ + struct uart_8250_port *up = &serial8250_ports[co->index]; + + serial8250_console_write(up, s, count); +} + +static unsigned int probe_baud(struct uart_port *port) +{ + unsigned char lcr, dll, dlm; + unsigned int quot; + + lcr = serial_port_in(port, UART_LCR); + serial_port_out(port, UART_LCR, lcr | UART_LCR_DLAB); + dll = serial_port_in(port, UART_DLL); + dlm = serial_port_in(port, UART_DLM); + serial_port_out(port, UART_LCR, lcr); + + quot = (dlm << 8) | dll; + return (port->uartclk / 16) / quot; +} + +static int serial8250_console_setup(struct uart_port *port, char *options, bool probe) { - struct uart_port *port; int baud = 9600; int bits = 8; int parity = 'n'; int flow = 'n'; + if (!port->iobase && !port->membase) + return -ENODEV; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + else if (probe) + baud = probe_baud(port); + + return uart_set_options(port, port->cons, baud, parity, bits, flow); +} + +static int univ8250_console_setup(struct console *co, char *options) +{ + struct uart_port *port; + /* * Check whether an invalid uart number has been specified, and * if so, search for the first available port that does have @@ -3327,53 +3457,84 @@ static int serial8250_console_setup(struct console *co, char *options) if (co->index >= nr_uarts) co->index = 0; port = &serial8250_ports[co->index].port; - if (!port->iobase && !port->membase) - return -ENODEV; + /* link port to console */ + port->cons = co; - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); + return serial8250_console_setup(port, options, false); } -static int serial8250_console_early_setup(void) +/** + * univ8250_console_match - non-standard console matching + * @co: registering console + * @name: name from console command line + * @idx: index from console command line + * @options: ptr to option string from console command line + * + * Only attempts to match console command lines of the form: + * console=uart[8250],io|mmio|mmio32,<addr>[,<options>] + * console=uart[8250],0x<addr>[,<options>] + * This form is used to register an initial earlycon boot console and + * replace it with the serial8250_console at 8250 driver init. + * + * Performs console setup for a match (as required by interface) + * If no <options> are specified, then assume the h/w is already setup. + * + * Returns 0 if console matches; otherwise non-zero to use default matching + */ +static int univ8250_console_match(struct console *co, char *name, int idx, + char *options) { - return serial8250_find_port_for_earlycon(); + char match[] = "uart"; /* 8250-specific earlycon name */ + unsigned char iotype; + unsigned long addr; + int i; + + if (strncmp(name, match, 4) != 0) + return -ENODEV; + + if (uart_parse_earlycon(options, &iotype, &addr, &options)) + return -ENODEV; + + /* try to match the port specified on the command line */ + for (i = 0; i < nr_uarts; i++) { + struct uart_port *port = &serial8250_ports[i].port; + + if (port->iotype != iotype) + continue; + if ((iotype == UPIO_MEM || iotype == UPIO_MEM32) && + (port->mapbase != addr)) + continue; + if (iotype == UPIO_PORT && port->iobase != addr) + continue; + + co->index = i; + port->cons = co; + return serial8250_console_setup(port, options, true); + } + + return -ENODEV; } -static struct console serial8250_console = { +static struct console univ8250_console = { .name = "ttyS", - .write = serial8250_console_write, + .write = univ8250_console_write, .device = uart_console_device, - .setup = serial8250_console_setup, - .early_setup = serial8250_console_early_setup, + .setup = univ8250_console_setup, + .match = univ8250_console_match, .flags = CON_PRINTBUFFER | CON_ANYTIME, .index = -1, .data = &serial8250_reg, }; -static int __init serial8250_console_init(void) +static int __init univ8250_console_init(void) { serial8250_isa_init_ports(); - register_console(&serial8250_console); + register_console(&univ8250_console); return 0; } -console_initcall(serial8250_console_init); - -int serial8250_find_port(struct uart_port *p) -{ - int line; - struct uart_port *port; - - for (line = 0; line < nr_uarts; line++) { - port = &serial8250_ports[line].port; - if (uart_match_port(p, port)) - return line; - } - return -ENODEV; -} +console_initcall(univ8250_console_init); -#define SERIAL8250_CONSOLE &serial8250_console +#define SERIAL8250_CONSOLE &univ8250_console #else #define SERIAL8250_CONSOLE NULL #endif @@ -3412,19 +3573,19 @@ int __init early_serial_setup(struct uart_port *port) p->iotype = port->iotype; p->flags = port->flags; p->mapbase = port->mapbase; + p->mapsize = port->mapsize; p->private_data = port->private_data; p->type = port->type; p->line = port->line; - set_io_from_upio(p); + serial8250_set_defaults(up_to_u8250p(p)); + if (port->serial_in) p->serial_in = port->serial_in; if (port->serial_out) p->serial_out = port->serial_out; if (port->handle_irq) p->handle_irq = port->handle_irq; - else - p->handle_irq = serial8250_default_handle_irq; return 0; } @@ -3444,7 +3605,8 @@ void serial8250_suspend_port(int line) port->type != PORT_8250) { unsigned char canary = 0xa5; serial_out(up, UART_SCR, canary); - up->canary = canary; + if (serial_in(up, UART_SCR) == canary) + up->canary = canary; } uart_suspend_port(&serial8250_reg, port); @@ -3666,6 +3828,7 @@ int serial8250_register_8250_port(struct uart_8250_port *up) uart->port.flags = up->port.flags | UPF_BOOT_AUTOCONF; uart->bugs = up->bugs; uart->port.mapbase = up->port.mapbase; + uart->port.mapsize = up->port.mapsize; uart->port.private_data = up->port.private_data; uart->port.fifosize = up->port.fifosize; uart->tx_loadsz = up->tx_loadsz; @@ -3674,6 +3837,7 @@ int serial8250_register_8250_port(struct uart_8250_port *up) uart->port.unthrottle = up->port.unthrottle; uart->port.rs485_config = up->port.rs485_config; uart->port.rs485 = up->port.rs485; + uart->dma = up->dma; /* Take tx_loadsz from fifosize if it wasn't set separately */ if (uart->port.fifosize && !uart->tx_loadsz) @@ -3682,10 +3846,14 @@ int serial8250_register_8250_port(struct uart_8250_port *up) if (up->port.dev) uart->port.dev = up->port.dev; + if (skip_txen_test) + uart->port.flags |= UPF_NO_TXEN_TEST; + if (up->port.flags & UPF_FIXED_TYPE) - serial8250_init_fixed_type_port(uart, up->port.type); + uart->port.type = up->port.type; + + serial8250_set_defaults(uart); - set_io_from_upio(&uart->port); /* Possibly override default I/O functions. */ if (up->port.serial_in) uart->port.serial_in = up->port.serial_in; @@ -3710,13 +3878,6 @@ int serial8250_register_8250_port(struct uart_8250_port *up) uart->dl_read = up->dl_read; if (up->dl_write) uart->dl_write = up->dl_write; - if (up->dma) { - uart->dma = up->dma; - if (!uart->dma->tx_dma) - uart->dma->tx_dma = serial8250_tx_dma; - if (!uart->dma->rx_dma) - uart->dma->rx_dma = serial8250_rx_dma; - } if (serial8250_isa_config != NULL) serial8250_isa_config(0, &uart->port, @@ -3747,9 +3908,11 @@ void serial8250_unregister_port(int line) uart_remove_one_port(&serial8250_reg, &uart->port); if (serial8250_isa_devs) { uart->port.flags &= ~UPF_BOOT_AUTOCONF; + if (skip_txen_test) + uart->port.flags |= UPF_NO_TXEN_TEST; uart->port.type = PORT_UNKNOWN; uart->port.dev = &serial8250_isa_devs->dev; - uart->capabilities = uart_config[uart->port.type].flags; + uart->capabilities = 0; uart_add_one_port(&serial8250_reg, &uart->port); } else { uart->port.dev = NULL; |