diff options
Diffstat (limited to 'target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c')
| -rw-r--r-- | target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c | 817 |
1 files changed, 817 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c b/target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c new file mode 100644 index 000000000..79037da49 --- /dev/null +++ b/target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c @@ -0,0 +1,817 @@ +/* + * drivers/serial/ubi32_serdes.c + * Ubicom32 On-Chip Serial Driver + * + * (C) Copyright 2009, Ubicom, Inc. + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port is free software: you can redistribute + * it and/or modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, either version 2 of the + * License, or (at your option) any later version. + * + * The Ubicom32 Linux Kernel Port is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; without even the implied + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/console.h> +#include <linux/sysrq.h> +#include <linux/platform_device.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial_core.h> + +#include <asm/ip5000.h> +#include <asm/ubicom32suart.h> + + +#define SERIAL_UBICOM_PIN_RXD (1 << 0) +#define SERIAL_UBICOM_PIN_TXD (1 << 6) +#define SERIAL_UBICOM_CTL0 0x8b300000 +#define SERIAL_UBICOM_CTL1 0x00000009 + +#define SERIAL_UBICOM_DATA_BIT 8 /* Fixed parameter - do not change */ +#define SERIAL_UBICOM_PAR_BIT 0 /* Fixed parameter - do not change */ +#define SERIAL_UBICOM_STOP_BIT 1 /* Fixed parameter - do not change */ + +/* UART name and device definitions */ +#define UBI32_SERDES_NAME "ttyUS" // XXX +#define UBI32_SERDES_MAJOR 206 // XXX +#define UBI32_SERDES_MINOR 64 // XXX + +#define PORT_UBI32_SERDES 1234 +#define NR_PORTS 1 + +struct uart_port ubi32_serdes_ports[NR_PORTS]; + +struct ubi32_serdes_resource { + void *uart_base_addr; + int uart_irq; + int uart_clock; +} ubi32_serdes_resource[NR_PORTS] = { + /* + * Get params from kernel command line (required for early printk) + * or from platform resources. + */ + {0, 0, 0} +}; + +/* + * Can get overridden by 'serdes=' kernel command line. + */ +static int ubi32_serdes_default_baud_rate = 115200; + + +#define IO_PORT(port) ((struct ubicom32_io_port *)port->membase) +#define IO_PORT_INT_STATUS(port) (IO_PORT(port)->int_status) +#define IO_PORT_INT_MASK(port) (IO_PORT(port)->int_mask) +#define IO_PORT_INT_CLR(port) (IO_PORT(port)->int_clr) + + +/* + * ubi32_serdes_get_char() + */ +static u8_t ubi32_serdes_get_char(struct ubicom32_io_port *io_port) +{ + /* + * Read from hardware (forced 32-bit atomic read). + */ + u32_t data = 0; + + if ( io_port ) { + io_port->int_clr = IO_PORTX_INT_SERDES_RXBF; + asm volatile ( + "move.4 %0, %1 \n\t" + : "=r" (data) + : "m" (*(u32_t *)&(io_port->rx_fifo)) + ); + } + + return (u8_t)(data & 0x000000ff); +} + +/* + * ubi32_serdes_put_char() + */ +static void ubi32_serdes_put_char(struct ubicom32_io_port *io_port, u8_t c) +{ + u32_t data = 0x0000fe00 | (c << 1); + + if ( io_port ) { + /* + * Fixed data format: + * [LSB]1 start bit - 8 data bits - no parity - 1 stop bit[MSB] + */ + io_port->int_clr = IO_PORTX_INT_SERDES_TXBE; + io_port->ctl2 = data; + io_port->int_set = IO_PORTX_INT_SERDES_TXBUF_VALID; + } +} + +static void ubi32_serdes_hw_init(struct uart_port *port, int baud) +{ + struct ubicom32_io_port *io_port = IO_PORT(port); + + if ( io_port ) { + /* + * Put port functions 1-4 into reset state. + * Function 0 (GPIO) does not need or have a reset bit. + * + * Select SERDES function for restart below. + */ + io_port->function = + IO_FUNC_FUNCTION_RESET(1) | IO_FUNC_FUNCTION_RESET(2) | + IO_FUNC_FUNCTION_RESET(3) | IO_FUNC_FUNCTION_RESET(4) | + IO_PORTX_FUNC_SERDES; + + /* + * Configure SERDES baudrate + */ + if ( baud == 0 ) { + baud = ubi32_serdes_default_baud_rate; + } + + io_port->ctl0 = + SERIAL_UBICOM_CTL0 | + ((port->uartclk / (16 * baud)) - 1); + + io_port->ctl1 = + SERIAL_UBICOM_CTL1; + + /* + * don't interrupt until startup and start_tx + */ + io_port->int_mask = 0; + + /* + * Set TXD pin output, RXD input and prevent GPIO + * override on the TXD & RXD pins + */ + io_port->gpio_ctl &= ~SERIAL_UBICOM_PIN_RXD; + io_port->gpio_ctl |= SERIAL_UBICOM_PIN_TXD; + io_port->gpio_mask &= ~(SERIAL_UBICOM_PIN_RXD | SERIAL_UBICOM_PIN_TXD); + + /* + * Restart (un-reset) the port's SERDES function. + */ + io_port->function &= ~(IO_FUNC_FUNCTION_RESET(IO_PORTX_FUNC_SERDES)); + } +} + +#define ULITE_STATUS_RXVALID IO_PORTX_INT_SERDES_RXBF +#define ULITE_STATUS_OVERRUN 0 +#define ULITE_STATUS_FRAME 0 +#define ULITE_STATUS_PARITY 0 +#define ULITE_STATUS_TXEMPTY IO_PORTX_INT_SERDES_TXBE +#define ULITE_STATUS_TXFULL 0 + +static int ubi32_serdes_receive(struct uart_port *port, int stat) +{ + struct tty_struct *tty = port->info->port.tty; + unsigned char ch = 0; + char flag = TTY_NORMAL; + + if ((stat & (ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN + | ULITE_STATUS_FRAME)) == 0) + return 0; + + /* stats */ + if (stat & ULITE_STATUS_RXVALID) { + port->icount.rx++; + ch = ubi32_serdes_get_char((struct ubicom32_io_port *)port->membase); + + if (stat & ULITE_STATUS_PARITY) + port->icount.parity++; + } + + if (stat & ULITE_STATUS_OVERRUN) + port->icount.overrun++; + + if (stat & ULITE_STATUS_FRAME) + port->icount.frame++; + + + /* drop byte with parity error if IGNPAR specificed */ + if (stat & port->ignore_status_mask & ULITE_STATUS_PARITY) + stat &= ~ULITE_STATUS_RXVALID; + + stat &= port->read_status_mask; + + if (stat & ULITE_STATUS_PARITY) + flag = TTY_PARITY; + + stat &= ~port->ignore_status_mask; + + if (stat & ULITE_STATUS_RXVALID) + tty_insert_flip_char(tty, ch, flag); + + if (stat & ULITE_STATUS_FRAME) + tty_insert_flip_char(tty, 0, TTY_FRAME); + + if (stat & ULITE_STATUS_OVERRUN) + tty_insert_flip_char(tty, 0, TTY_OVERRUN); + + return 1; +} + +/* + * interrupts are disabled on entry + */ +static void ubi32_serdes_stop_tx(struct uart_port *port) +{ + IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) & ~IO_PORTX_INT_SERDES_TXBE; +} + +static int ubi32_serdes_transmit(struct uart_port *port, int stat) +{ + struct circ_buf *xmit = &port->info->xmit; + + if (!(stat & IO_PORTX_INT_SERDES_TXBE)) + return 0; + + if (port->x_char) { + ubi32_serdes_put_char(IO_PORT(port), port->x_char); + port->x_char = 0; + port->icount.tx++; + return 1; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { + ubi32_serdes_stop_tx(port); + return 0; + } + + ubi32_serdes_put_char(IO_PORT(port), xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1); + port->icount.tx++; + + /* wake up */ + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + if (uart_circ_empty(xmit)) + ubi32_serdes_stop_tx(port); + + return 1; +} + +/* + * port is locked and interrupts are disabled + */ +static void ubi32_serdes_start_tx(struct uart_port *port) +{ + IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) | IO_PORTX_INT_SERDES_TXBE; + ubi32_serdes_transmit(port, IO_PORT_INT_STATUS(port)); +} + +/* + * Interrupts are enabled + */ +static void ubi32_serdes_stop_rx(struct uart_port *port) +{ + /* don't forward any more data (like !CREAD) */ + port->ignore_status_mask = IO_PORTX_INT_SERDES_RXBF; +} + +/* + * Set the modem control timer to fire immediately. + */ +static void ubi32_serdes_enable_ms(struct uart_port *port) +{ + /* N/A */ +} + +static irqreturn_t ubi32_serdes_isr(int irq, void *dev_id) +{ + struct uart_port *port = dev_id; + int busy; + + spin_lock(&port->lock); + + do { + int stat = IO_PORT_INT_STATUS(port); + busy = ubi32_serdes_receive(port, stat); + busy |= ubi32_serdes_transmit(port, stat); + } while (busy); + + tty_flip_buffer_push(port->info->port.tty); + + spin_unlock(&port->lock); + + return IRQ_HANDLED; +} + +/* + * Return TIOCSER_TEMT when transmitter is not busy. + */ +static unsigned int ubi32_serdes_tx_empty(struct uart_port *port) +{ + unsigned long flags; + unsigned int ret; + + spin_lock_irqsave(&port->lock, flags); + ret = IO_PORT_INT_STATUS(port); + spin_unlock_irqrestore(&port->lock, flags); + + return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0; +} + +static unsigned int ubi32_serdes_get_mctrl(struct uart_port *port) +{ + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; +} + +static void ubi32_serdes_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* N/A */ +} + +/* + * Interrupts are always disabled. + */ +static void ubi32_serdes_break_ctl(struct uart_port *port, int break_state) +{ + /* N/A */ +} + +static int ubi32_serdes_startup(struct uart_port *port) +{ + if (request_irq(port->irq, ubi32_serdes_isr, IRQF_DISABLED, + "UBI32_SERDES", port)) { + printk(KERN_NOTICE "Unable to attach port interrupt\n"); + return -EBUSY; + } + + IO_PORT_INT_CLR(port) = IO_PORTX_INT_SERDES_RXBF; + IO_PORT_INT_MASK(port) = IO_PORTX_INT_SERDES_RXBF; + return 0; +} + +static void ubi32_serdes_shutdown(struct uart_port *port) +{ + struct ubi32_serdes_port *uart = (struct ubi32_serdes_port *)port; + + IO_PORT_INT_MASK(port) = 0; + free_irq(port->irq, uart); +} + +static void +ubi32_serdes_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) +{ + unsigned long flags; + unsigned int baud; + + spin_lock_irqsave(&port->lock, flags); + + port->read_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN + | ULITE_STATUS_TXFULL; + + if (termios->c_iflag & INPCK) + port->read_status_mask |= + ULITE_STATUS_PARITY | ULITE_STATUS_FRAME; + + port->ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + port->ignore_status_mask |= ULITE_STATUS_PARITY + | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; + + /* ignore all characters if CREAD is not set */ + if ((termios->c_cflag & CREAD) == 0) + port->ignore_status_mask |= + ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY + | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; + + /* update timeout */ + baud = uart_get_baud_rate(port, termios, old, 0, 460800); + uart_update_timeout(port, termios->c_cflag, baud); + + IO_PORT(port)->ctl0 = SERIAL_UBICOM_CTL0 | + ((port->uartclk / (16 * baud)) - 1); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static const char *ubi32_serdes_type(struct uart_port *port) +{ + return port->type == PORT_UBI32_SERDES ? "UBI32_SERDES" : NULL; +} + +/* + * Release the memory region(s) being used by 'port'. + */ +static void ubi32_serdes_release_port(struct uart_port *port) +{ +} + +/* + * Request the memory region(s) being used by 'port'. + */ +static int ubi32_serdes_request_port(struct uart_port *port) +{ + return 0; +} + +/* + * Configure/autoconfigure the port. + */ +static void ubi32_serdes_config_port(struct uart_port *port, int flags) +{ + if (flags & UART_CONFIG_TYPE && + ubi32_serdes_request_port(port) == 0) + port->type = PORT_UBI32_SERDES; +} + +/* + * Verify the new serial_struct (for TIOCSSERIAL). + * The only change we allow are to the flags and type, and + * even then only between PORT_UBI32_SERDES and PORT_UNKNOWN + */ +static int +ubi32_serdes_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + return 0; +} + +static struct uart_ops ubi32_serdes_pops = { + .tx_empty = ubi32_serdes_tx_empty, + .set_mctrl = ubi32_serdes_set_mctrl, + .get_mctrl = ubi32_serdes_get_mctrl, + .stop_tx = ubi32_serdes_stop_tx, + .start_tx = ubi32_serdes_start_tx, + .stop_rx = ubi32_serdes_stop_rx, + .enable_ms = ubi32_serdes_enable_ms, + .break_ctl = ubi32_serdes_break_ctl, + .startup = ubi32_serdes_startup, + .shutdown = ubi32_serdes_shutdown, + .set_termios = ubi32_serdes_set_termios, + .type = ubi32_serdes_type, + .release_port = ubi32_serdes_release_port, + .request_port = ubi32_serdes_request_port, + .config_port = ubi32_serdes_config_port, + .verify_port = ubi32_serdes_verify_port, +}; + +static void __init ubi32_serdes_init_ports(void) +{ + int i; + + for (i = 0; i < NR_PORTS; i++) { + ubi32_serdes_ports[i].uartclk = ubi32_serdes_resource[i].uart_clock; + ubi32_serdes_ports[i].ops = &ubi32_serdes_pops; + ubi32_serdes_ports[i].line = i; + ubi32_serdes_ports[i].iotype = UPIO_MEM; + ubi32_serdes_ports[i].membase = + (void __iomem *)ubi32_serdes_resource[i].uart_base_addr; + ubi32_serdes_ports[i].mapbase = + (resource_size_t)ubi32_serdes_resource[i].uart_base_addr; + ubi32_serdes_ports[i].irq = + ubi32_serdes_resource[i].uart_irq; + ubi32_serdes_ports[i].flags = UPF_BOOT_AUTOCONF; + + ubi32_serdes_hw_init(&ubi32_serdes_ports[i], 0); + } + +} + +#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE +/* + * If the port was already initialised (eg, by a boot loader), + * try to determine the current setup. + */ +static void __init +ubi32_serdes_console_get_options(struct uart_port *port, int *baud) +{ + u32 round_to = 1200; + u32 real_baud; + + /* + * We might get called before platform init and with no + * kernel command line options, so port might be NULL. + */ + *baud = ubi32_serdes_default_baud_rate;; + if ( IO_PORT(port) == 0 ) + return; + + real_baud = port->uartclk + / (16 * ((IO_PORT(port)->ctl0 & ~SERIAL_UBICOM_CTL0) + 1)); + + *baud = ((real_baud + round_to - 1) / round_to) * round_to; + + pr_debug("%s:baud = %d, real_baud = %d\n", __FUNCTION__, *baud, real_baud); +} +#endif + +#if defined(CONFIG_SERIAL_UBI32_SERDES_CONSOLE) || defined(CONFIG_EARLY_PRINTK) +static struct uart_driver ubi32_serdes_reg; + +static int __init +ubi32_serdes_console_setup(struct console *co, char *options) +{ + struct uart_port *port; +#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE + int baud = ubi32_serdes_default_baud_rate; + int bits = 8; + int parity = 'n'; + int flow = 'n'; +#endif + + /* + * Check whether an invalid uart number has been specified, and + * if so, search for the first available port that does have + * console support. + */ + if (co->index == -1 || co->index >= NR_PORTS) + co->index = 0; + port = &ubi32_serdes_ports[co->index]; + +#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE + if (options) { + uart_parse_options(options, &baud, &parity, &bits, &flow); + ubi32_serdes_hw_init(port, baud); + } + else + ubi32_serdes_console_get_options(port, &baud); + + return uart_set_options(port, co, baud, parity, bits, flow); +#else + return 0; +#endif +} +#endif /* defined (CONFIG_SERIAL_UBI32_SERDES_CONSOLE) || + defined (CONFIG_EARLY_PRINTK) */ + +#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE +static void +ubi32_serdes_console_putchar(struct uart_port *port, int ch) +{ + if ( IO_PORT(port) ) { + while (!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE)) + barrier(); + ubi32_serdes_put_char(IO_PORT(port), ch); + } +} + +/* + * Interrupts are disabled on entering + */ +static void +ubi32_serdes_console_write(struct console *co, const char *s, unsigned int count) +{ + struct uart_port *port = &ubi32_serdes_ports[co->index]; + unsigned long flags = 0; + + spin_lock_irqsave(&port->lock, flags); + uart_console_write(port, s, count, ubi32_serdes_console_putchar); + spin_unlock_irqrestore(&port->lock, flags); + +} + +static struct console ubi32_serdes_console = { + .name = UBI32_SERDES_NAME, + .write = ubi32_serdes_console_write, + .device = uart_console_device, + .setup = ubi32_serdes_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &ubi32_serdes_reg, +}; + +static int __init ubi32_serdes_console_init(void) +{ + ubi32_serdes_init_ports(); + register_console(&ubi32_serdes_console); + return 0; +} +console_initcall(ubi32_serdes_console_init); + +#define UBI32_SERDES_CONSOLE &ubi32_serdes_console +#else +#define UBI32_SERDES_CONSOLE NULL +#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */ + + +#ifdef CONFIG_EARLY_PRINTK +static __init void ubi32_serdes_early_putc(struct uart_port *port, int ch) +{ + unsigned timeout = 0xffff; + + while ((!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE)) && --timeout) + cpu_relax(); + ubi32_serdes_put_char(IO_PORT(port), ch); +} + +static __init void ubi32_serdes_early_write(struct console *con, const char *s, + unsigned int n) +{ + struct uart_port *port = &ubi32_serdes_ports[con->index]; + unsigned int i; + + for (i = 0; i < n; i++, s++) { + if (*s == '\n') + ubi32_serdes_early_putc(port, '\r'); + ubi32_serdes_early_putc(port, *s); + } +} + +static struct __init console ubi32_serdes_early_console = { + .name = "early_US", + .write = ubi32_serdes_early_write, + .device = uart_console_device, + .flags = CON_PRINTBUFFER, + .setup = ubi32_serdes_console_setup, + .index = -1, + .data = &ubi32_serdes_reg, +}; + +/* + * XXX Unused in our driver. Need to find out what the termios initialization is good/needed for. + */ +struct console __init *ubi32_serdes_early_init(unsigned int port_index, + unsigned int cflag) +{ + struct uart_port *uart; + struct ktermios t; + + if (port_index == -1 || port_index >= NR_PORTS) + port_index = 0; + ubi32_serdes_init_ports(); + ubi32_serdes_early_console.index = port_index; + uart = &ubi32_serdes_ports[port_index]; + t.c_cflag = cflag; + t.c_iflag = 0; + t.c_oflag = 0; + t.c_lflag = ICANON; + t.c_line = port_index; + ubi32_serdes_set_termios(uart, &t, &t); + return &ubi32_serdes_early_console; +} + +#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */ + +static struct uart_driver ubi32_serdes_reg = { + .owner = THIS_MODULE, + .driver_name = "ubi32_serdes", + .dev_name = UBI32_SERDES_NAME, + .major = UBI32_SERDES_MAJOR, + .minor = UBI32_SERDES_MINOR, + .nr = NR_PORTS, + .cons = UBI32_SERDES_CONSOLE, +}; + +static int ubi32_serdes_suspend(struct platform_device *dev, pm_message_t state) +{ + struct uart_port *port = platform_get_drvdata(dev); + + if (port) + uart_suspend_port(&ubi32_serdes_reg, port); + + return 0; +} + +static int ubi32_serdes_resume(struct platform_device *dev) +{ + struct uart_port *port = platform_get_drvdata(dev); + + if (port) + uart_resume_port(&ubi32_serdes_reg, port); + + return 0; +} + +static int ubi32_serdes_probe(struct platform_device *dev) +{ + struct resource *res = dev->resource; + int i; + + for (i = 0; i < dev->num_resources; i++, res++) { + if (res->flags & IORESOURCE_MEM) { + ubi32_serdes_resource[0].uart_base_addr = (void *) res->start; + } + else if (res->flags & IORESOURCE_IRQ) { + ubi32_serdes_resource[0].uart_irq = res->start; + } + else if (res->flags & UBICOM32_SUART_IORESOURCE_CLOCK) { + ubi32_serdes_resource[0].uart_clock = res->start; + } + } + + ubi32_serdes_init_ports(); + + return 0; +} + +static int ubi32_serdes_remove(struct platform_device *pdev) +{ + struct uart_port *port = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + + if (port) + uart_remove_one_port(&ubi32_serdes_reg, port); + + return 0; +} + +static struct platform_driver ubi32_serdes_driver = { + .remove = ubi32_serdes_remove, + .suspend = ubi32_serdes_suspend, + .resume = ubi32_serdes_resume, + .driver = { + .name = "ubicom32suart", + .owner = THIS_MODULE, + }, +}; + + +#ifndef MODULE +/* + * Called at boot time. + * + * You can specify IO base, IRQ, and clock for the serdes serial port + * using kernel command line "serdes=0xiobase,irq,clock". Values + * specified will be overwritten by platform device data, if present. + */ +static int __init ubi32_serdes_setup(char *str) +{ +#define N_PARMS (4+1) + int ints[N_PARMS]; + int i; + + str = get_options(str, ARRAY_SIZE(ints), ints); + + for (i = 0; i < N_PARMS; i++) { + if (i < ints[0]) { + if (i == 0) { + ubi32_serdes_resource[0].uart_base_addr = (void *) ints[i+1]; + } + else if (i == 1) { + ubi32_serdes_resource[0].uart_irq = ints[i+1]; + } + else if (i == 2) { + ubi32_serdes_resource[0].uart_clock = ints[i+1]; + } + else if (i == 3) { + ubi32_serdes_default_baud_rate = ints[i+1]; + } + } + } + return 1; +} + +__setup("serdes=", ubi32_serdes_setup); +#endif + +static int __init ubi32_serdes_init(void) +{ + int ret; + + pr_info("Serial: Ubicom32 serdes uart serial driver\n"); + + ret = platform_driver_probe(&ubi32_serdes_driver, ubi32_serdes_probe); + if (ret != 0) { + printk(KERN_INFO "serdes platform_driver_probe() failed: %d\n", ret); + return ret; + } + + ubi32_serdes_init_ports(); + + ret = uart_register_driver(&ubi32_serdes_reg); + if ( ret == 0 ) { + ret = uart_add_one_port(&ubi32_serdes_reg, &ubi32_serdes_ports[0]); + if ( ret != 0 ) { + uart_unregister_driver(&ubi32_serdes_reg); + } + } + + return ret; +} + +static void __exit ubi32_serdes_exit(void) +{ + platform_driver_unregister(&ubi32_serdes_driver); + uart_unregister_driver(&ubi32_serdes_reg); +} + +module_init(ubi32_serdes_init); +module_exit(ubi32_serdes_exit); + +MODULE_AUTHOR("Rainer Keller <rkeller@ubicom.com>"); +MODULE_DESCRIPTION("Ubicom generic serial port driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_CHARDEV_MAJOR(UBI32_SERDES_MAJOR); +MODULE_ALIAS("platform:ubi32_serdes"); |