diff options
Diffstat (limited to 'target/linux/lantiq/patches-2.6.32/0009-SERIAL-Lantiq-Add-driver-for-MIPS-Lantiq-SOCs.patch')
| -rw-r--r-- | target/linux/lantiq/patches-2.6.32/0009-SERIAL-Lantiq-Add-driver-for-MIPS-Lantiq-SOCs.patch | 804 |
1 files changed, 804 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-2.6.32/0009-SERIAL-Lantiq-Add-driver-for-MIPS-Lantiq-SOCs.patch b/target/linux/lantiq/patches-2.6.32/0009-SERIAL-Lantiq-Add-driver-for-MIPS-Lantiq-SOCs.patch new file mode 100644 index 0000000..1d04aaa --- /dev/null +++ b/target/linux/lantiq/patches-2.6.32/0009-SERIAL-Lantiq-Add-driver-for-MIPS-Lantiq-SOCs.patch @@ -0,0 +1,804 @@ +From 1d2b44b1afa3ef081cd817dbf947d48eb8f5d21a Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Tue, 5 Apr 2011 14:10:57 +0200 +Subject: [PATCH 09/13] SERIAL: Lantiq: Add driver for MIPS Lantiq SOCs. + +Signed-off-by: John Crispin <blogic@openwrt.org> +Signed-off-by: Ralph Hempel <ralph.hempel@lantiq.com> +Signed-off-by: Felix Fietkau <nbd@openwrt.org> +Cc: alan@lxorguk.ukuu.org.uk +Cc: linux-mips@linux-mips.org +Cc: linux-serial@vger.kernel.org +Patchwork: https://patchwork.linux-mips.org/patch/2269/ +Acked-by: Alan Cox <alan@linux.intel.com> +Signed-off-by: Ralf Baechle <ralf@linux-mips.org> +--- + drivers/tty/serial/Kconfig | 8 + + drivers/tty/serial/Makefile | 1 + + drivers/tty/serial/lantiq.c | 756 +++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 765 insertions(+), 0 deletions(-) + create mode 100644 drivers/tty/serial/lantiq.c + +--- /dev/null ++++ b/drivers/serial/lantiq.c +@@ -0,0 +1,756 @@ ++/* ++ * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ * ++ * This program 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 this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ * Copyright (C) 2004 Infineon IFAP DC COM CPE ++ * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> ++ * Copyright (C) 2007 John Crispin <blogic@openwrt.org> ++ * Copyright (C) 2010 Thomas Langer, <thomas.langer@lantiq.com> ++ */ ++ ++#include <linux/slab.h> ++#include <linux/module.h> ++#include <linux/ioport.h> ++#include <linux/init.h> ++#include <linux/console.h> ++#include <linux/sysrq.h> ++#include <linux/device.h> ++#include <linux/tty.h> ++#include <linux/tty_flip.h> ++#include <linux/serial_core.h> ++#include <linux/serial.h> ++#include <linux/platform_device.h> ++#include <linux/io.h> ++#include <linux/clk.h> ++ ++#include <lantiq_soc.h> ++ ++#define PORT_LTQ_ASC 111 ++#define MAXPORTS 2 ++#define UART_DUMMY_UER_RX 1 ++#define DRVNAME "ltq_asc" ++#ifdef __BIG_ENDIAN ++#define LTQ_ASC_TBUF (0x0020 + 3) ++#define LTQ_ASC_RBUF (0x0024 + 3) ++#else ++#define LTQ_ASC_TBUF 0x0020 ++#define LTQ_ASC_RBUF 0x0024 ++#endif ++#define LTQ_ASC_FSTAT 0x0048 ++#define LTQ_ASC_WHBSTATE 0x0018 ++#define LTQ_ASC_STATE 0x0014 ++#define LTQ_ASC_IRNCR 0x00F8 ++#define LTQ_ASC_CLC 0x0000 ++#define LTQ_ASC_ID 0x0008 ++#define LTQ_ASC_PISEL 0x0004 ++#define LTQ_ASC_TXFCON 0x0044 ++#define LTQ_ASC_RXFCON 0x0040 ++#define LTQ_ASC_CON 0x0010 ++#define LTQ_ASC_BG 0x0050 ++#define LTQ_ASC_IRNREN 0x00F4 ++ ++#define ASC_IRNREN_TX 0x1 ++#define ASC_IRNREN_RX 0x2 ++#define ASC_IRNREN_ERR 0x4 ++#define ASC_IRNREN_TX_BUF 0x8 ++#define ASC_IRNCR_TIR 0x1 ++#define ASC_IRNCR_RIR 0x2 ++#define ASC_IRNCR_EIR 0x4 ++ ++#define ASCOPT_CSIZE 0x3 ++#define TXFIFO_FL 1 ++#define RXFIFO_FL 1 ++#define ASCCLC_DISS 0x2 ++#define ASCCLC_RMCMASK 0x0000FF00 ++#define ASCCLC_RMCOFFSET 8 ++#define ASCCON_M_8ASYNC 0x0 ++#define ASCCON_M_7ASYNC 0x2 ++#define ASCCON_ODD 0x00000020 ++#define ASCCON_STP 0x00000080 ++#define ASCCON_BRS 0x00000100 ++#define ASCCON_FDE 0x00000200 ++#define ASCCON_R 0x00008000 ++#define ASCCON_FEN 0x00020000 ++#define ASCCON_ROEN 0x00080000 ++#define ASCCON_TOEN 0x00100000 ++#define ASCSTATE_PE 0x00010000 ++#define ASCSTATE_FE 0x00020000 ++#define ASCSTATE_ROE 0x00080000 ++#define ASCSTATE_ANY (ASCSTATE_ROE|ASCSTATE_PE|ASCSTATE_FE) ++#define ASCWHBSTATE_CLRREN 0x00000001 ++#define ASCWHBSTATE_SETREN 0x00000002 ++#define ASCWHBSTATE_CLRPE 0x00000004 ++#define ASCWHBSTATE_CLRFE 0x00000008 ++#define ASCWHBSTATE_CLRROE 0x00000020 ++#define ASCTXFCON_TXFEN 0x0001 ++#define ASCTXFCON_TXFFLU 0x0002 ++#define ASCTXFCON_TXFITLMASK 0x3F00 ++#define ASCTXFCON_TXFITLOFF 8 ++#define ASCRXFCON_RXFEN 0x0001 ++#define ASCRXFCON_RXFFLU 0x0002 ++#define ASCRXFCON_RXFITLMASK 0x3F00 ++#define ASCRXFCON_RXFITLOFF 8 ++#define ASCFSTAT_RXFFLMASK 0x003F ++#define ASCFSTAT_TXFFLMASK 0x3F00 ++#define ASCFSTAT_TXFREEMASK 0x3F000000 ++#define ASCFSTAT_TXFREEOFF 24 ++ ++static void lqasc_tx_chars(struct uart_port *port); ++static struct ltq_uart_port *lqasc_port[MAXPORTS]; ++static struct uart_driver lqasc_reg; ++static DEFINE_SPINLOCK(ltq_asc_lock); ++ ++struct ltq_uart_port { ++ struct uart_port port; ++ struct clk *clk; ++ unsigned int tx_irq; ++ unsigned int rx_irq; ++ unsigned int err_irq; ++}; ++ ++static inline struct ++ltq_uart_port *to_ltq_uart_port(struct uart_port *port) ++{ ++ return container_of(port, struct ltq_uart_port, port); ++} ++ ++static void ++lqasc_stop_tx(struct uart_port *port) ++{ ++ return; ++} ++ ++static void ++lqasc_start_tx(struct uart_port *port) ++{ ++ unsigned long flags; ++ spin_lock_irqsave(<q_asc_lock, flags); ++ lqasc_tx_chars(port); ++ spin_unlock_irqrestore(<q_asc_lock, flags); ++ return; ++} ++ ++static void ++lqasc_stop_rx(struct uart_port *port) ++{ ++ ltq_w32(ASCWHBSTATE_CLRREN, port->membase + LTQ_ASC_WHBSTATE); ++} ++ ++static void ++lqasc_enable_ms(struct uart_port *port) ++{ ++} ++ ++static int ++lqasc_rx_chars(struct uart_port *port) ++{ ++ struct tty_struct *tty = tty_port_tty_get(&port->state->port); ++ unsigned int ch = 0, rsr = 0, fifocnt; ++ ++ if (!tty) { ++ dev_dbg(port->dev, "%s:tty is busy now", __func__); ++ return -EBUSY; ++ } ++ fifocnt = ++ ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_RXFFLMASK; ++ while (fifocnt--) { ++ u8 flag = TTY_NORMAL; ++ ch = ltq_r8(port->membase + LTQ_ASC_RBUF); ++ rsr = (ltq_r32(port->membase + LTQ_ASC_STATE) ++ & ASCSTATE_ANY) | UART_DUMMY_UER_RX; ++ tty_flip_buffer_push(tty); ++ port->icount.rx++; ++ ++ /* ++ * Note that the error handling code is ++ * out of the main execution path ++ */ ++ if (rsr & ASCSTATE_ANY) { ++ if (rsr & ASCSTATE_PE) { ++ port->icount.parity++; ++ ltq_w32_mask(0, ASCWHBSTATE_CLRPE, ++ port->membase + LTQ_ASC_WHBSTATE); ++ } else if (rsr & ASCSTATE_FE) { ++ port->icount.frame++; ++ ltq_w32_mask(0, ASCWHBSTATE_CLRFE, ++ port->membase + LTQ_ASC_WHBSTATE); ++ } ++ if (rsr & ASCSTATE_ROE) { ++ port->icount.overrun++; ++ ltq_w32_mask(0, ASCWHBSTATE_CLRROE, ++ port->membase + LTQ_ASC_WHBSTATE); ++ } ++ ++ rsr &= port->read_status_mask; ++ ++ if (rsr & ASCSTATE_PE) ++ flag = TTY_PARITY; ++ else if (rsr & ASCSTATE_FE) ++ flag = TTY_FRAME; ++ } ++ ++ if ((rsr & port->ignore_status_mask) == 0) ++ tty_insert_flip_char(tty, ch, flag); ++ ++ if (rsr & ASCSTATE_ROE) ++ /* ++ * Overrun is special, since it's reported ++ * immediately, and doesn't affect the current ++ * character ++ */ ++ tty_insert_flip_char(tty, 0, TTY_OVERRUN); ++ } ++ if (ch != 0) ++ tty_flip_buffer_push(tty); ++ tty_kref_put(tty); ++ return 0; ++} ++ ++static void ++lqasc_tx_chars(struct uart_port *port) ++{ ++ struct circ_buf *xmit = &port->state->xmit; ++ if (uart_tx_stopped(port)) { ++ lqasc_stop_tx(port); ++ return; ++ } ++ ++ while (((ltq_r32(port->membase + LTQ_ASC_FSTAT) & ++ ASCFSTAT_TXFREEMASK) >> ASCFSTAT_TXFREEOFF) != 0) { ++ if (port->x_char) { ++ ltq_w8(port->x_char, port->membase + LTQ_ASC_TBUF); ++ port->icount.tx++; ++ port->x_char = 0; ++ continue; ++ } ++ ++ if (uart_circ_empty(xmit)) ++ break; ++ ++ ltq_w8(port->state->xmit.buf[port->state->xmit.tail], ++ port->membase + LTQ_ASC_TBUF); ++ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); ++ port->icount.tx++; ++ } ++ ++ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) ++ uart_write_wakeup(port); ++} ++ ++static irqreturn_t ++lqasc_tx_int(int irq, void *_port) ++{ ++ unsigned long flags; ++ struct uart_port *port = (struct uart_port *)_port; ++ spin_lock_irqsave(<q_asc_lock, flags); ++ ltq_w32(ASC_IRNCR_TIR, port->membase + LTQ_ASC_IRNCR); ++ spin_unlock_irqrestore(<q_asc_lock, flags); ++ lqasc_start_tx(port); ++ return IRQ_HANDLED; ++} ++ ++static irqreturn_t ++lqasc_err_int(int irq, void *_port) ++{ ++ unsigned long flags; ++ struct uart_port *port = (struct uart_port *)_port; ++ spin_lock_irqsave(<q_asc_lock, flags); ++ /* clear any pending interrupts */ ++ ltq_w32_mask(0, ASCWHBSTATE_CLRPE | ASCWHBSTATE_CLRFE | ++ ASCWHBSTATE_CLRROE, port->membase + LTQ_ASC_WHBSTATE); ++ spin_unlock_irqrestore(<q_asc_lock, flags); ++ return IRQ_HANDLED; ++} ++ ++static irqreturn_t ++lqasc_rx_int(int irq, void *_port) ++{ ++ unsigned long flags; ++ struct uart_port *port = (struct uart_port *)_port; ++ spin_lock_irqsave(<q_asc_lock, flags); ++ ltq_w32(ASC_IRNCR_RIR, port->membase + LTQ_ASC_IRNCR); ++ lqasc_rx_chars(port); ++ spin_unlock_irqrestore(<q_asc_lock, flags); ++ return IRQ_HANDLED; ++} ++ ++static unsigned int ++lqasc_tx_empty(struct uart_port *port) ++{ ++ int status; ++ status = ltq_r32(port->membase + LTQ_ASC_FSTAT) & ASCFSTAT_TXFFLMASK; ++ return status ? 0 : TIOCSER_TEMT; ++} ++ ++static unsigned int ++lqasc_get_mctrl(struct uart_port *port) ++{ ++ return TIOCM_CTS | TIOCM_CAR | TIOCM_DSR; ++} ++ ++static void ++lqasc_set_mctrl(struct uart_port *port, u_int mctrl) ++{ ++} ++ ++static void ++lqasc_break_ctl(struct uart_port *port, int break_state) ++{ ++} ++ ++static int ++lqasc_startup(struct uart_port *port) ++{ ++ struct ltq_uart_port *ltq_port = to_ltq_uart_port(port); ++ int retval; ++ ++ port->uartclk = clk_get_rate(ltq_port->clk); ++ ++ ltq_w32_mask(ASCCLC_DISS | ASCCLC_RMCMASK, (1 << ASCCLC_RMCOFFSET), ++ port->membase + LTQ_ASC_CLC); ++ ++ ltq_w32(0, port->membase + LTQ_ASC_PISEL); ++ ltq_w32( ++ ((TXFIFO_FL << ASCTXFCON_TXFITLOFF) & ASCTXFCON_TXFITLMASK) | ++ ASCTXFCON_TXFEN | ASCTXFCON_TXFFLU, ++ port->membase + LTQ_ASC_TXFCON); ++ ltq_w32( ++ ((RXFIFO_FL << ASCRXFCON_RXFITLOFF) & ASCRXFCON_RXFITLMASK) ++ | ASCRXFCON_RXFEN | ASCRXFCON_RXFFLU, ++ port->membase + LTQ_ASC_RXFCON); ++ /* make sure other settings are written to hardware before ++ * setting enable bits ++ */ ++ wmb(); ++ ltq_w32_mask(0, ASCCON_M_8ASYNC | ASCCON_FEN | ASCCON_TOEN | ++ ASCCON_ROEN, port->membase + LTQ_ASC_CON); ++ ++ retval = request_irq(ltq_port->tx_irq, lqasc_tx_int, ++ IRQF_DISABLED, "asc_tx", port); ++ if (retval) { ++ pr_err("failed to request lqasc_tx_int\n"); ++ return retval; ++ } ++ ++ retval = request_irq(ltq_port->rx_irq, lqasc_rx_int, ++ IRQF_DISABLED, "asc_rx", port); ++ if (retval) { ++ pr_err("failed to request lqasc_rx_int\n"); ++ goto err1; ++ } ++ ++ retval = request_irq(ltq_port->err_irq, lqasc_err_int, ++ IRQF_DISABLED, "asc_err", port); ++ if (retval) { ++ pr_err("failed to request lqasc_err_int\n"); ++ goto err2; ++ } ++ ++ ltq_w32(ASC_IRNREN_RX | ASC_IRNREN_ERR | ASC_IRNREN_TX, ++ port->membase + LTQ_ASC_IRNREN); ++ return 0; ++ ++err2: ++ free_irq(ltq_port->rx_irq, port); ++err1: ++ free_irq(ltq_port->tx_irq, port); ++ return retval; ++} ++ ++static void ++lqasc_shutdown(struct uart_port *port) ++{ ++ struct ltq_uart_port *ltq_port = to_ltq_uart_port(port); ++ free_irq(ltq_port->tx_irq, port); ++ free_irq(ltq_port->rx_irq, port); ++ free_irq(ltq_port->err_irq, port); ++ ++ ltq_w32(0, port->membase + LTQ_ASC_CON); ++ ltq_w32_mask(ASCRXFCON_RXFEN, ASCRXFCON_RXFFLU, ++ port->membase + LTQ_ASC_RXFCON); ++ ltq_w32_mask(ASCTXFCON_TXFEN, ASCTXFCON_TXFFLU, ++ port->membase + LTQ_ASC_TXFCON); ++} ++ ++static void ++lqasc_set_termios(struct uart_port *port, ++ struct ktermios *new, struct ktermios *old) ++{ ++ unsigned int cflag; ++ unsigned int iflag; ++ unsigned int divisor; ++ unsigned int baud; ++ unsigned int con = 0; ++ unsigned long flags; ++ ++ cflag = new->c_cflag; ++ iflag = new->c_iflag; ++ ++ switch (cflag & CSIZE) { ++ case CS7: ++ con = ASCCON_M_7ASYNC; ++ break; ++ ++ case CS5: ++ case CS6: ++ default: ++ new->c_cflag &= ~ CSIZE; ++ new->c_cflag |= CS8; ++ con = ASCCON_M_8ASYNC; ++ break; ++ } ++ ++ cflag &= ~CMSPAR; /* Mark/Space parity is not supported */ ++ ++ if (cflag & CSTOPB) ++ con |= ASCCON_STP; ++ ++ if (cflag & PARENB) { ++ if (!(cflag & PARODD)) ++ con &= ~ASCCON_ODD; ++ else ++ con |= ASCCON_ODD; ++ } ++ ++ port->read_status_mask = ASCSTATE_ROE; ++ if (iflag & INPCK) ++ port->read_status_mask |= ASCSTATE_FE | ASCSTATE_PE; ++ ++ port->ignore_status_mask = 0; ++ if (iflag & IGNPAR) ++ port->ignore_status_mask |= ASCSTATE_FE | ASCSTATE_PE; ++ ++ if (iflag & IGNBRK) { ++ /* ++ * If we're ignoring parity and break indicators, ++ * ignore overruns too (for real raw support). ++ */ ++ if (iflag & IGNPAR) ++ port->ignore_status_mask |= ASCSTATE_ROE; ++ } ++ ++ if ((cflag & CREAD) == 0) ++ port->ignore_status_mask |= UART_DUMMY_UER_RX; ++ ++ /* set error signals - framing, parity and overrun, enable receiver */ ++ con |= ASCCON_FEN | ASCCON_TOEN | ASCCON_ROEN; ++ ++ spin_lock_irqsave(<q_asc_lock, flags); ++ ++ /* set up CON */ ++ ltq_w32_mask(0, con, port->membase + LTQ_ASC_CON); ++ ++ /* Set baud rate - take a divider of 2 into account */ ++ baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16); ++ divisor = uart_get_divisor(port, baud); ++ divisor = divisor / 2 - 1; ++ ++ /* disable the baudrate generator */ ++ ltq_w32_mask(ASCCON_R, 0, port->membase + LTQ_ASC_CON); ++ ++ /* make sure the fractional divider is off */ ++ ltq_w32_mask(ASCCON_FDE, 0, port->membase + LTQ_ASC_CON); ++ ++ /* set up to use divisor of 2 */ ++ ltq_w32_mask(ASCCON_BRS, 0, port->membase + LTQ_ASC_CON); ++ ++ /* now we can write the new baudrate into the register */ ++ ltq_w32(divisor, port->membase + LTQ_ASC_BG); ++ ++ /* turn the baudrate generator back on */ ++ ltq_w32_mask(0, ASCCON_R, port->membase + LTQ_ASC_CON); ++ ++ /* enable rx */ ++ ltq_w32(ASCWHBSTATE_SETREN, port->membase + LTQ_ASC_WHBSTATE); ++ ++ spin_unlock_irqrestore(<q_asc_lock, flags); ++ ++ /* Don't rewrite B0 */ ++ if (tty_termios_baud_rate(new)) ++ tty_termios_encode_baud_rate(new, baud, baud); ++} ++ ++static const char* ++lqasc_type(struct uart_port *port) ++{ ++ if (port->type == PORT_LTQ_ASC) ++ return DRVNAME; ++ else ++ return NULL; ++} ++ ++static void ++lqasc_release_port(struct uart_port *port) ++{ ++ if (port->flags & UPF_IOREMAP) { ++ iounmap(port->membase); ++ port->membase = NULL; ++ } ++} ++ ++static int ++lqasc_request_port(struct uart_port *port) ++{ ++ struct platform_device *pdev = to_platform_device(port->dev); ++ struct resource *res; ++ int size; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ if (!res) { ++ dev_err(&pdev->dev, "cannot obtain I/O memory region"); ++ return -ENODEV; ++ } ++ size = resource_size(res); ++ ++ res = devm_request_mem_region(&pdev->dev, res->start, ++ size, dev_name(&pdev->dev)); ++ if (!res) { ++ dev_err(&pdev->dev, "cannot request I/O memory region"); ++ return -EBUSY; ++ } ++ ++ if (port->flags & UPF_IOREMAP) { ++ port->membase = devm_ioremap_nocache(&pdev->dev, ++ port->mapbase, size); ++ if (port->membase == NULL) ++ return -ENOMEM; ++ } ++ return 0; ++} ++ ++static void ++lqasc_config_port(struct uart_port *port, int flags) ++{ ++ if (flags & UART_CONFIG_TYPE) { ++ port->type = PORT_LTQ_ASC; ++ lqasc_request_port(port); ++ } ++} ++ ++static int ++lqasc_verify_port(struct uart_port *port, ++ struct serial_struct *ser) ++{ ++ int ret = 0; ++ if (ser->type != PORT_UNKNOWN && ser->type != PORT_LTQ_ASC) ++ ret = -EINVAL; ++ if (ser->irq < 0 || ser->irq >= NR_IRQS) ++ ret = -EINVAL; ++ if (ser->baud_base < 9600) ++ ret = -EINVAL; ++ return ret; ++} ++ ++static struct uart_ops lqasc_pops = { ++ .tx_empty = lqasc_tx_empty, ++ .set_mctrl = lqasc_set_mctrl, ++ .get_mctrl = lqasc_get_mctrl, ++ .stop_tx = lqasc_stop_tx, ++ .start_tx = lqasc_start_tx, ++ .stop_rx = lqasc_stop_rx, ++ .enable_ms = lqasc_enable_ms, ++ .break_ctl = lqasc_break_ctl, ++ .startup = lqasc_startup, ++ .shutdown = lqasc_shutdown, ++ .set_termios = lqasc_set_termios, ++ .type = lqasc_type, ++ .release_port = lqasc_release_port, ++ .request_port = lqasc_request_port, ++ .config_port = lqasc_config_port, ++ .verify_port = lqasc_verify_port, ++}; ++ ++static void ++lqasc_console_putchar(struct uart_port *port, int ch) ++{ ++ int fifofree; ++ ++ if (!port->membase) ++ return; ++ ++ do { ++ fifofree = (ltq_r32(port->membase + LTQ_ASC_FSTAT) ++ & ASCFSTAT_TXFREEMASK) >> ASCFSTAT_TXFREEOFF; ++ } while (fifofree == 0); ++ ltq_w8(ch, port->membase + LTQ_ASC_TBUF); ++} ++ ++ ++static void ++lqasc_console_write(struct console *co, const char *s, u_int count) ++{ ++ struct ltq_uart_port *ltq_port; ++ struct uart_port *port; ++ unsigned long flags; ++ ++ if (co->index >= MAXPORTS) ++ return; ++ ++ ltq_port = lqasc_port[co->index]; ++ if (!ltq_port) ++ return; ++ ++ port = <q_port->port; ++ ++ spin_lock_irqsave(<q_asc_lock, flags); ++ uart_console_write(port, s, count, lqasc_console_putchar); ++ spin_unlock_irqrestore(<q_asc_lock, flags); ++} ++ ++static int __init ++lqasc_console_setup(struct console *co, char *options) ++{ ++ struct ltq_uart_port *ltq_port; ++ struct uart_port *port; ++ int baud = 115200; ++ int bits = 8; ++ int parity = 'n'; ++ int flow = 'n'; ++ ++ if (co->index >= MAXPORTS) ++ return -ENODEV; ++ ++ ltq_port = lqasc_port[co->index]; ++ if (!ltq_port) ++ return -ENODEV; ++ ++ port = <q_port->port; ++ ++ port->uartclk = clk_get_rate(ltq_port->clk); ++ ++ if (options) ++ uart_parse_options(options, &baud, &parity, &bits, &flow); ++ return uart_set_options(port, co, baud, parity, bits, flow); ++} ++ ++static struct console lqasc_console = { ++ .name = "ttyLTQ", ++ .write = lqasc_console_write, ++ .device = uart_console_device, ++ .setup = lqasc_console_setup, ++ .flags = CON_PRINTBUFFER, ++ .index = -1, ++ .data = &lqasc_reg, ++}; ++ ++static int __init ++lqasc_console_init(void) ++{ ++ register_console(&lqasc_console); ++ return 0; ++} ++console_initcall(lqasc_console_init); ++ ++static struct uart_driver lqasc_reg = { ++ .owner = THIS_MODULE, ++ .driver_name = DRVNAME, ++ .dev_name = "ttyLTQ", ++ .major = 0, ++ .minor = 0, ++ .nr = MAXPORTS, ++ .cons = &lqasc_console, ++}; ++ ++static int __init ++lqasc_probe(struct platform_device *pdev) ++{ ++ struct ltq_uart_port *ltq_port; ++ struct uart_port *port; ++ struct resource *mmres, *irqres; ++ int tx_irq, rx_irq, err_irq; ++ struct clk *clk; ++ int ret; ++ ++ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ irqres = platform_get_resource(pdev, IORESOURCE_IRQ, 0); ++ if (!mmres || !irqres) ++ return -ENODEV; ++ ++ if (pdev->id >= MAXPORTS) ++ return -EBUSY; ++ ++ if (lqasc_port[pdev->id] != NULL) ++ return -EBUSY; ++ ++ clk = clk_get(&pdev->dev, "fpi"); ++ if (IS_ERR(clk)) { ++ pr_err("failed to get fpi clk\n"); ++ return -ENOENT; ++ } ++ ++ tx_irq = platform_get_irq_byname(pdev, "tx"); ++ rx_irq = platform_get_irq_byname(pdev, "rx"); ++ err_irq = platform_get_irq_byname(pdev, "err"); ++ if ((tx_irq < 0) | (rx_irq < 0) | (err_irq < 0)) ++ return -ENODEV; ++ ++ ltq_port = kzalloc(sizeof(struct ltq_uart_port), GFP_KERNEL); ++ if (!ltq_port) ++ return -ENOMEM; ++ ++ port = <q_port->port; ++ ++ port->iotype = SERIAL_IO_MEM; ++ port->flags = ASYNC_BOOT_AUTOCONF | UPF_IOREMAP; ++ port->ops = &lqasc_pops; ++ port->fifosize = 16; ++ port->type = PORT_LTQ_ASC, ++ port->line = pdev->id; ++ port->dev = &pdev->dev; ++ ++ port->irq = tx_irq; /* unused, just to be backward-compatibe */ ++ port->mapbase = mmres->start; ++ ++ ltq_port->clk = clk; ++ ++ ltq_port->tx_irq = tx_irq; ++ ltq_port->rx_irq = rx_irq; ++ ltq_port->err_irq = err_irq; ++ ++ lqasc_port[pdev->id] = ltq_port; ++ platform_set_drvdata(pdev, ltq_port); ++ ++ ret = uart_add_one_port(&lqasc_reg, port); ++ ++ return ret; ++} ++ ++static struct platform_driver lqasc_driver = { ++ .driver = { ++ .name = DRVNAME, ++ .owner = THIS_MODULE, ++ }, ++}; ++ ++int __init ++init_lqasc(void) ++{ ++ int ret; ++ ++ ret = uart_register_driver(&lqasc_reg); ++ if (ret != 0) ++ return ret; ++ ++ ret = platform_driver_probe(&lqasc_driver, lqasc_probe); ++ if (ret != 0) ++ uart_unregister_driver(&lqasc_reg); ++ ++ return ret; ++} ++ ++module_init(init_lqasc); ++ ++MODULE_DESCRIPTION("Lantiq serial port driver"); ++MODULE_LICENSE("GPL"); +--- a/drivers/serial/Kconfig ++++ b/drivers/serial/Kconfig +@@ -1383,6 +1383,14 @@ + help + Support for Console on the NWP serial ports. + ++config SERIAL_LANTIQ ++ bool "Lantiq serial driver" ++ depends on LANTIQ ++ select SERIAL_CORE ++ select SERIAL_CORE_CONSOLE ++ help ++ Support for console and UART on Lantiq SoCs. ++ + config SERIAL_QE + tristate "Freescale QUICC Engine serial port support" + depends on QUICC_ENGINE +--- a/drivers/serial/Makefile ++++ b/drivers/serial/Makefile +@@ -81,3 +81,4 @@ + obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o + obj-$(CONFIG_SERIAL_QE) += ucc_uart.o + obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o ++obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o |