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, 938 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c b/target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c new file mode 100644 index 000000000..f14fcdfd9 --- /dev/null +++ b/target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c @@ -0,0 +1,938 @@ +/* + * 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"); |