diff options
Diffstat (limited to 'target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c')
| -rw-r--r-- | target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c | 938 |
1 files changed, 0 insertions, 938 deletions
diff --git a/target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c b/target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c deleted file mode 100644 index f14fcdfd9a..0000000000 --- a/target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c +++ /dev/null @@ -1,938 +0,0 @@ -/* - * drivers/serial/ubi32_mailbox.c - * Ubicom32 On-Chip Mailbox 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 <linux/version.h> - -#include <asm/ip5000.h> - -#define SERIAL_UBICOM_BAUDRATE 115200 -#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_MAILBOX_NAME "ttyUM" // XXX -#define UBI32_MAILBOX_MAJOR 207 // XXX -#define UBI32_MAILBOX_MINOR 64 - -#define PORT_UBI32_MAILBOX 1235 -#define NR_PORTS 1 - -#define get_sclk() 0 - -struct ubi32_mailbox_port { - struct uart_port port; - /* - * NOTE (rkeller): - * the uart port is wrapped in another structure in case we need to hold more state than - * what we can hold in the uart_port. - * Not sure if we need this, I took over the concept from the blackfin driver. - */ -} ubi32_mailbox_ports[NR_PORTS]; - -struct ubi32_mailbox_resource { - int uart_base_addr; - int uart_irq; -} ubi32_mailbox_resource[NR_PORTS] = { - /* - * uart_base_addr has to be non-NULL because it is put in the uart_port membase. - * If membase if null the kernel skips the configuration and our port_type never gets set. - */ - {ISD_MAILBOX_BASE, ISD_MAILBOX_INT} -}; - -static volatile struct ubicom32_isd_mailbox { - volatile u32_t in; - volatile u32_t out; - volatile u32_t status; -} *ubi32_mailbox = (struct ubicom32_isd_mailbox *)ISD_MAILBOX_BASE; - -static void ubi32_mailbox_tx_chars(struct ubi32_mailbox_port *uart); - -static void ubi32_mailbox_mctrl_check(struct ubi32_mailbox_port *uart); - -#define TRUE 1 -#define FALSE 0 - -static int mailbox_console_flg = TRUE; -static int num_timeouts = 0; - -/* - * dummy functions and defined to be able to compile the Blackfin code - */ -#define UART_GET_LSR(port) (1) -#define UART_PUT_LSR(port, bits) -#define UART_CLEAR_LSR(port) (1) -#define TEMT 1 -#define TFI 1 -#define BI 1 -#define PE 1 -#define OE 1 -#define FE 1 -#define THRE 1 -#define DR 1 -#define UART_GET_LCR(port) (1) -#define UART_PUT_LCR(port, bits) -#define SB 1 -#define STB 1 -#define PEN 1 -#define EPS 1 -#define STP 1 -#define WLS(n) 0 -#define UART_GET_IER(port) (1) -#define UART_SET_IER(port, bits) -#define UART_CLEAR_IER(port, bits) -#define ETBEI 0 -#define ERBFI 0 -#define UART_GET_CHAR(port) ubi32_mailbox_get_char() -#define UART_PUT_CHAR(port, ch) ubi32_mailbox_put_char(ch) -#define SSYNC() -#define UART_GET_DLL(port) 0 -#define UART_PUT_DLL(port, ch) -#define UART_GET_DLH(port) 0 -#define UART_PUT_DLH(port, ch) -#define UART_GET_GCTL(port) (0) -#define UART_PUT_GCTL(port, ch) -#define UCEN 1 - -/* - * ubi32_mailbox_get_char_avail() - */ -static int ubi32_mailbox_get_char_avail(void) -{ - return !(ubi32_mailbox->status & ISD_MAILBOX_STATUS_IN_EMPTY); -} - -/* - * ubi32_mailbox_get_char() - */ -static u32_t ubi32_mailbox_get_char(void) -{ - if (mailbox_console_flg == TRUE) { - /* - * Mailbox console is connected. - */ - while (ubi32_mailbox->status & ISD_MAILBOX_STATUS_IN_EMPTY); - return ubi32_mailbox->in & 0xff; - } - - /* - * Mailbox console was not connected. - */ - if (ubi32_mailbox->status & ISD_MAILBOX_STATUS_IN_EMPTY) { - return 0xff; - } - - /* - * Mailbox console is connecting. - */ - mailbox_console_flg = TRUE; - num_timeouts = 0; - return ubi32_mailbox->in & 0xff; -} - -#define MAILBOX_MAX_ATTEMPTS 1000000 -#define MAILBOX_MAX_TIMEOUTS 5 -/* - * ubi32_mailbox_put_char() - */ -static void ubi32_mailbox_put_char(u32_t v) -{ - /* - * Wait to be able to output. - */ - u32_t num_attempts = 0; - - if(mailbox_console_flg == TRUE) { - while(num_attempts++ < MAILBOX_MAX_ATTEMPTS) { - if(ubi32_mailbox->status & ISD_MAILBOX_STATUS_OUT_EMPTY) { - break; - } - } - - /* - * If timed out more than 5 times on send, mailbox console is disconnected now. - */ - if (num_attempts > MAILBOX_MAX_ATTEMPTS) { - if (num_timeouts++ > MAILBOX_MAX_TIMEOUTS) { - mailbox_console_flg = FALSE; - } - } - } - - asm volatile( - "pipe_flush 0 \n\t" - "pipe_flush 0 \n\t" - "pipe_flush 0 \n\t" - "pipe_flush 0 \n\t" - "pipe_flush 0 \n\t" - "pipe_flush 0 \n\t" - "pipe_flush 0 \n\t" - ); - - ubi32_mailbox->out = v & 0xff; -} - -static void ubi32_mailbox_hw_init(struct ubi32_mailbox_port *uart) -{ -// NOTE: It does not do any good to do these here because we are running on the linux hardware thread, -// and these have to be called on the ldsr thread. -// ubicom32_clear_interrupt(ISD_MAILBOX_INT); -// ubicom32_enable_interrupt(ISD_MAILBOX_INT); -} - -/* - * interrupts are disabled on entry - */ -static void ubi32_mailbox_stop_tx(struct uart_port *port) -{ -// struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; -// struct circ_buf *xmit = &uart->port.info->xmit; - - while (!(UART_GET_LSR(uart) & TEMT)) - cpu_relax(); - - /* Clear TFI bit */ - UART_PUT_LSR(uart, TFI); - UART_CLEAR_IER(uart, ETBEI); -} - -/* - * port is locked and interrupts are disabled - */ -static void ubi32_mailbox_start_tx(struct uart_port *port) -{ - struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - - UART_SET_IER(uart, ETBEI); - - ubi32_mailbox_tx_chars(uart); -} - -/* - * Interrupts are enabled - */ -static void ubi32_mailbox_stop_rx(struct uart_port *port) -{ -// struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - UART_CLEAR_IER(uart, ERBFI); -} - -/* - * Set the modem control timer to fire immediately. - */ -static void ubi32_mailbox_enable_ms(struct uart_port *port) -{ -} - -static void ubi32_mailbox_rx_chars(struct ubi32_mailbox_port *uart) -{ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32) - struct uart_state *state = uart->port.state; - struct tty_struct *tty = state->port.tty; -#else - struct uart_info *info = uart->port.info; - struct tty_struct *tty = info->port.tty; -#endif - unsigned int status, ch, flg; - - status = 0; // XXX? UART_GET_LSR(uart); - UART_CLEAR_LSR(uart); - - ch = UART_GET_CHAR(uart); - - if(ch == 0xff) - return; - - uart->port.icount.rx++; - - if (status & BI) { - uart->port.icount.brk++; - if (uart_handle_break(&uart->port)) - goto ignore_char; - status &= ~(PE | FE); - } - if (status & PE) - uart->port.icount.parity++; - if (status & OE) - uart->port.icount.overrun++; - if (status & FE) - uart->port.icount.frame++; - - status &= uart->port.read_status_mask; - - if (status & BI) - flg = TTY_BREAK; - else if (status & PE) - flg = TTY_PARITY; - else if (status & FE) - flg = TTY_FRAME; - else - flg = TTY_NORMAL; - - if (uart_handle_sysrq_char(&uart->port, ch)) - goto ignore_char; - - uart_insert_char(&uart->port, status, OE, ch, flg); - - ignore_char: - tty_flip_buffer_push(tty); -} - -static void ubi32_mailbox_tx_chars(struct ubi32_mailbox_port *uart) -{ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32) - struct circ_buf *xmit = &uart->port.state->xmit; -#else - struct circ_buf *xmit = &uart->port.info->xmit; -#endif - - if (uart->port.x_char) { - UART_PUT_CHAR(uart, uart->port.x_char); - uart->port.icount.tx++; - uart->port.x_char = 0; - } - /* - * Check the modem control lines before - * transmitting anything. - */ - ubi32_mailbox_mctrl_check(uart); - - if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) { - ubi32_mailbox_stop_tx(&uart->port); - return; - } - - while ((UART_GET_LSR(uart) & THRE) && xmit->tail != xmit->head) { - UART_PUT_CHAR(uart, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - uart->port.icount.tx++; - SSYNC(); - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uart->port); - - if (uart_circ_empty(xmit)) - ubi32_mailbox_stop_tx(&uart->port); -} - -static irqreturn_t ubi32_mailbox_isr(int irq, void *dev_id) -{ - struct ubi32_mailbox_port *uart = dev_id; - - spin_lock(&uart->port.lock); - - //XXX?while (UART_GET_LSR(uart) & DR) - - /* - * RX process - */ - while (ubi32_mailbox_get_char_avail()) { - ubi32_mailbox_rx_chars(uart); - } - -#if 0 - /* - * TX process - */ - if (this_uart.tx_in == this_uart.tx_out) { - UBICOM32_IO_PORT(SERIAL_UBICOM_PORT)->int_mask &= ~IO_PORTX_INT_SERDES_TXBE; - } else if (UBICOM32_IO_PORT(SERIAL_UBICOM_PORT)->int_status & IO_PORTX_INT_SERDES_TXBE) { - uart_ubicom32_send(this_uart.tx_buf[this_uart.tx_out & (SERIAL_UBICOM_BUF_SIZE - 1)]); - this_uart.tx_out++; - UBICOM32_IO_PORT(SERIAL_UBICOM_PORT)->int_mask |= IO_PORTX_INT_SERDES_TXBE; - } -#endif - - spin_unlock(&uart->port.lock); - - return IRQ_HANDLED; -} -#if 0 -static irqreturn_t ubi32_mailbox_tx_int(int irq, void *dev_id) -{ - struct ubi32_mailbox_port *uart = dev_id; - - spin_lock(&uart->port.lock); - if (UART_GET_LSR(uart) & THRE) - ubi32_mailbox_tx_chars(uart); - spin_unlock(&uart->port.lock); - - return IRQ_HANDLED; -} -#endif - -/* - * Return TIOCSER_TEMT when transmitter is not busy. - */ -static unsigned int ubi32_mailbox_tx_empty(struct uart_port *port) -{ -// struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - unsigned short lsr; - - lsr = UART_GET_LSR(uart); - if (lsr & TEMT) - return TIOCSER_TEMT; - else - return 0; -} - -static unsigned int ubi32_mailbox_get_mctrl(struct uart_port *port) -{ - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; -} - -static void ubi32_mailbox_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -/* - * Handle any change of modem status signal since we were last called. - */ -static void ubi32_mailbox_mctrl_check(struct ubi32_mailbox_port *uart) -{ -} - -/* - * Interrupts are always disabled. - */ -static void ubi32_mailbox_break_ctl(struct uart_port *port, int break_state) -{ -// struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - u16 lcr = UART_GET_LCR(uart); - if (break_state) - lcr |= SB; - else - lcr &= ~SB; - UART_PUT_LCR(uart, lcr); - SSYNC(); -} - -static int ubi32_mailbox_startup(struct uart_port *port) -{ - struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - - if (request_irq(uart->port.irq, ubi32_mailbox_isr, IRQF_DISABLED, - "UBI32_MAILBOX", uart)) { - printk(KERN_NOTICE "Unable to attach Ubicom32 SERDES interrupt\n"); - return -EBUSY; - } - - UART_SET_IER(uart, ERBFI); - return 0; -} - -static void ubi32_mailbox_shutdown(struct uart_port *port) -{ - struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - - free_irq(uart->port.irq, uart); -} - -static void -ubi32_mailbox_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - unsigned long flags; - unsigned int baud, quot; - unsigned short val, ier, lsr, lcr = 0; - - switch (termios->c_cflag & CSIZE) { - case CS8: - lcr = WLS(8); - break; - case CS7: - lcr = WLS(7); - break; - case CS6: - lcr = WLS(6); - break; - case CS5: - lcr = WLS(5); - break; - default: - printk(KERN_ERR "%s: word lengh not supported\n", - __FUNCTION__); - } - - if (termios->c_cflag & CSTOPB) - lcr |= STB; - if (termios->c_cflag & PARENB) - lcr |= PEN; - if (!(termios->c_cflag & PARODD)) - lcr |= EPS; - if (termios->c_cflag & CMSPAR) - lcr |= STP; - - port->read_status_mask = OE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= (FE | PE); - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= BI; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= FE | PE; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= OE; - } - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - spin_lock_irqsave(&uart->port.lock, flags); - - do { - lsr = UART_GET_LSR(uart); - } while (!(lsr & TEMT)); - - /* Disable UART */ - ier = UART_GET_IER(uart); - UART_CLEAR_IER(uart, 0xF); - - UART_PUT_DLL(uart, quot & 0xFF); - SSYNC(); - UART_PUT_DLH(uart, (quot >> 8) & 0xFF); - SSYNC(); - - UART_PUT_LCR(uart, lcr); - - /* Enable UART */ - UART_SET_IER(uart, ier); - - val = UART_GET_GCTL(uart); - val |= UCEN; - UART_PUT_GCTL(uart, val); - - spin_unlock_irqrestore(&uart->port.lock, flags); -} - -static const char *ubi32_mailbox_type(struct uart_port *port) -{ - struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - - return uart->port.type == PORT_UBI32_MAILBOX ? "UBI32_MAILBOX" : NULL; -} - -/* - * Release the memory region(s) being used by 'port'. - */ -static void ubi32_mailbox_release_port(struct uart_port *port) -{ -} - -/* - * Request the memory region(s) being used by 'port'. - */ -static int ubi32_mailbox_request_port(struct uart_port *port) -{ - return 0; -} - -/* - * Configure/autoconfigure the port. - */ -static void ubi32_mailbox_config_port(struct uart_port *port, int flags) -{ - struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - - if (flags & UART_CONFIG_TYPE && ubi32_mailbox_request_port(&uart->port) == 0) - uart->port.type = PORT_UBI32_MAILBOX; -} - -/* - * 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_MAILBOX and PORT_UNKNOWN - */ -static int -ubi32_mailbox_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return 0; -} - -static struct uart_ops ubi32_mailbox_pops = { - .tx_empty = ubi32_mailbox_tx_empty, - .set_mctrl = ubi32_mailbox_set_mctrl, - .get_mctrl = ubi32_mailbox_get_mctrl, - .stop_tx = ubi32_mailbox_stop_tx, - .start_tx = ubi32_mailbox_start_tx, - .stop_rx = ubi32_mailbox_stop_rx, - .enable_ms = ubi32_mailbox_enable_ms, - .break_ctl = ubi32_mailbox_break_ctl, - .startup = ubi32_mailbox_startup, - .shutdown = ubi32_mailbox_shutdown, - .set_termios = ubi32_mailbox_set_termios, - .type = ubi32_mailbox_type, - .release_port = ubi32_mailbox_release_port, - .request_port = ubi32_mailbox_request_port, - .config_port = ubi32_mailbox_config_port, - .verify_port = ubi32_mailbox_verify_port, -}; - -static void __init ubi32_mailbox_init_ports(void) -{ - static int first = 1; - int i; - - if (!first) - return; - first = 0; - - for (i = 0; i < NR_PORTS; i++) { - ubi32_mailbox_ports[i].port.uartclk = get_sclk(); - ubi32_mailbox_ports[i].port.ops = &ubi32_mailbox_pops; - ubi32_mailbox_ports[i].port.line = i; - ubi32_mailbox_ports[i].port.iotype = UPIO_MEM; - ubi32_mailbox_ports[i].port.membase = - (void __iomem *)ubi32_mailbox_resource[i].uart_base_addr; - ubi32_mailbox_ports[i].port.mapbase = - ubi32_mailbox_resource[i].uart_base_addr; - ubi32_mailbox_ports[i].port.irq = - ubi32_mailbox_resource[i].uart_irq; - ubi32_mailbox_ports[i].port.flags = UPF_BOOT_AUTOCONF; - spin_lock_init(&ubi32_mailbox_ports[i].port.lock); - - ubi32_mailbox_hw_init(&ubi32_mailbox_ports[i]); - } - -} - -#ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE -/* - * If the port was already initialised (eg, by a boot loader), - * try to determine the current setup. - */ -static void __init -ubi32_mailbox_console_get_options(struct ubi32_mailbox_port *uart, int *baud, - int *parity, int *bits) -{ - unsigned short status; - - status = UART_GET_IER(uart) & (ERBFI | ETBEI); - if (status == (ERBFI | ETBEI)) { - /* ok, the port was enabled */ - unsigned short lcr; - unsigned short dlh, dll; - - lcr = UART_GET_LCR(uart); - - *parity = 'n'; - if (lcr & PEN) { - if (lcr & EPS) - *parity = 'e'; - else - *parity = 'o'; - } - switch (lcr & 0x03) { - case 0: *bits = 5; break; - case 1: *bits = 6; break; - case 2: *bits = 7; break; - case 3: *bits = 8; break; - } - - dll = UART_GET_DLL(uart); - dlh = UART_GET_DLH(uart); - - *baud = get_sclk() / (16*(dll | dlh << 8)); - } - pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __FUNCTION__, *baud, *parity, *bits); -} -#endif - -#if defined(CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE) || defined(CONFIG_EARLY_PRINTK) -static struct uart_driver ubi32_mailbox_reg; - -static int __init -ubi32_mailbox_console_setup(struct console *co, char *options) -{ - struct ubi32_mailbox_port *uart; -# ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE - int baud = SERIAL_UBICOM_BAUDRATE; - 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; - uart = &ubi32_mailbox_ports[co->index]; - -# ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - ubi32_mailbox_console_get_options(uart, &baud, &parity, &bits); - - //JB return uart_set_options(&uart->port, co, baud, parity, bits, flow); - return 0; -# else - return 0; -# endif -} -#endif /* defined (CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE) || - defined (CONFIG_EARLY_PRINTK) */ - -#ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE -static void ubi32_mailbox_console_putchar(struct uart_port *port, int ch) -{ -// struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port; - while (!(UART_GET_LSR(uart) & THRE)) - barrier(); - UART_PUT_CHAR(uart, ch); - SSYNC(); -} - -/* - * Interrupts are disabled on entering - */ -static void -ubi32_mailbox_console_write(struct console *co, const char *s, unsigned int count) -{ - struct ubi32_mailbox_port *uart = &ubi32_mailbox_ports[co->index]; - unsigned long flags = 0; - - spin_lock_irqsave(&uart->port.lock, flags); - uart_console_write(&uart->port, s, count, ubi32_mailbox_console_putchar); - spin_unlock_irqrestore(&uart->port.lock, flags); - -} - -static struct console ubi32_mailbox_console = { - .name = UBI32_MAILBOX_NAME, - .write = ubi32_mailbox_console_write, - .device = uart_console_device, - .setup = ubi32_mailbox_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &ubi32_mailbox_reg, -}; - -static int __init ubi32_mailbox_console_init(void) -{ - ubi32_mailbox_init_ports(); - register_console(&ubi32_mailbox_console); - return 0; -} -console_initcall(ubi32_mailbox_console_init); - -#define UBI32_MAILBOX_CONSOLE &ubi32_mailbox_console -#else -#define UBI32_MAILBOX_CONSOLE NULL -#endif /* CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE */ - - -#ifdef CONFIG_EARLY_PRINTK -static __init void ubi32_mailbox_early_putc(struct uart_port *port, int ch) -{ - UART_PUT_CHAR(uart, ch); -} - -static __init void ubi32_mailbox_early_write(struct console *con, const char *s, - unsigned int n) -{ - struct ubi32_mailbox_port *uart = &ubi32_mailbox_ports[con->index]; - unsigned int i; - - for (i = 0; i < n; i++, s++) { - if (*s == '\n') - ubi32_mailbox_early_putc(&uart->port, '\r'); - ubi32_mailbox_early_putc(&uart->port, *s); - } -} - -static struct __init console ubi32_mailbox_early_console = { - .name = "early_UM", - .write = ubi32_mailbox_early_write, - .device = uart_console_device, - .flags = CON_PRINTBUFFER, - .setup = ubi32_mailbox_console_setup, - .index = -1, - .data = &ubi32_mailbox_reg, -}; - -/* - * XXX Unused in our driver. Need to find out what the termios initialization is good/needed for. - */ -struct console __init *ubi32_mailbox_early_init(unsigned int port, - unsigned int cflag) -{ - struct ubi32_mailbox_port *uart; - struct ktermios t; - - if (port == -1 || port >= NR_PORTS) - port = 0; - ubi32_mailbox_init_ports(); - ubi32_mailbox_early_console.index = port; - uart = &ubi32_mailbox_ports[port]; - t.c_cflag = cflag; - t.c_iflag = 0; - t.c_oflag = 0; - t.c_lflag = ICANON; - t.c_line = port; - ubi32_mailbox_set_termios(&uart->port, &t, &t); - return &ubi32_mailbox_early_console; -} - -#endif /* CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE */ - -static struct uart_driver ubi32_mailbox_reg = { - .owner = THIS_MODULE, - .driver_name = "ubi32_mailbox", - .dev_name = UBI32_MAILBOX_NAME, - .major = UBI32_MAILBOX_MAJOR, - .minor = UBI32_MAILBOX_MINOR, - .nr = NR_PORTS, - .cons = UBI32_MAILBOX_CONSOLE, -}; - -static int ubi32_mailbox_suspend(struct platform_device *dev, pm_message_t state) -{ - struct ubi32_mailbox_port *uart = platform_get_drvdata(dev); - - if (uart) - uart_suspend_port(&ubi32_mailbox_reg, &uart->port); - - return 0; -} - -static int ubi32_mailbox_resume(struct platform_device *dev) -{ - struct ubi32_mailbox_port *uart = platform_get_drvdata(dev); - - if (uart) - uart_resume_port(&ubi32_mailbox_reg, &uart->port); - - return 0; -} - -static int ubi32_mailbox_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) - break; - - if (i < dev->num_resources) { - for (i = 0; i < NR_PORTS; i++, res++) { - if (ubi32_mailbox_ports[i].port.mapbase != res->start) - continue; - ubi32_mailbox_ports[i].port.dev = &dev->dev; - uart_add_one_port(&ubi32_mailbox_reg, &ubi32_mailbox_ports[i].port); - platform_set_drvdata(dev, &ubi32_mailbox_ports[i]); - } - } - - return 0; -} - -static int ubi32_mailbox_remove(struct platform_device *pdev) -{ - struct ubi32_mailbox_port *uart = platform_get_drvdata(pdev); - - platform_set_drvdata(pdev, NULL); - - if (uart) - uart_remove_one_port(&ubi32_mailbox_reg, &uart->port); - - return 0; -} - -static struct platform_driver ubi32_mailbox_driver = { - .probe = ubi32_mailbox_probe, - .remove = ubi32_mailbox_remove, - .suspend = ubi32_mailbox_suspend, - .resume = ubi32_mailbox_resume, - .driver = { - .name = "ubi32-mbox", - .owner = THIS_MODULE, - }, -}; - -static int __init ubi32_mailbox_init(void) -{ - int ret; - - pr_info("Serial: Ubicom32 mailbox serial driver.\n"); - - mailbox_console_flg = TRUE; - num_timeouts = 0; - ubi32_mailbox_init_ports(); - - ret = uart_register_driver(&ubi32_mailbox_reg); - if (ret == 0) { - ret = platform_driver_register(&ubi32_mailbox_driver); - if (ret) { - pr_debug("uart register failed\n"); - uart_unregister_driver(&ubi32_mailbox_reg); - } - } - - /* - * XXX HACK: currently probe does not get called, but the port needs to be added to work. - */ - uart_add_one_port(&ubi32_mailbox_reg, &ubi32_mailbox_ports[0].port); - return ret; -} - -static void __exit ubi32_mailbox_exit(void) -{ - platform_driver_unregister(&ubi32_mailbox_driver); - uart_unregister_driver(&ubi32_mailbox_reg); -} - -module_init(ubi32_mailbox_init); -module_exit(ubi32_mailbox_exit); - -MODULE_ALIAS_CHARDEV_MAJOR(UBI32_MAILBOX_MAJOR); -MODULE_ALIAS("platform:ubi32_mailbox"); |