summaryrefslogtreecommitdiff
path: root/drivers/serial/pxa.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/serial/pxa.c')
-rw-r--r--drivers/serial/pxa.c879
1 files changed, 0 insertions, 879 deletions
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
deleted file mode 100644
index 1102a39b44f5..000000000000
--- a/drivers/serial/pxa.c
+++ /dev/null
@@ -1,879 +0,0 @@
-/*
- * linux/drivers/serial/pxa.c
- *
- * Based on drivers/serial/8250.c by Russell King.
- *
- * Author: Nicolas Pitre
- * Created: Feb 20, 2003
- * Copyright: (C) 2003 Monta Vista Software, Inc.
- *
- * This program 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.
- *
- * Note 1: This driver is made separate from the already too overloaded
- * 8250.c because it needs some kirks of its own and that'll make it
- * easier to add DMA support.
- *
- * Note 2: I'm too sick of device allocation policies for serial ports.
- * If someone else wants to request an "official" allocation of major/minor
- * for this driver please be my guest. And don't forget that new hardware
- * to come from Intel might have more than 3 or 4 of those UARTs. Let's
- * hope for a better port registration and dynamic device allocation scheme
- * with the serial core maintainer satisfaction to appear soon.
- */
-
-
-#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/serial_reg.h>
-#include <linux/circ_buf.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-struct uart_pxa_port {
- struct uart_port port;
- unsigned char ier;
- unsigned char lcr;
- unsigned char mcr;
- unsigned int lsr_break_flag;
- struct clk *clk;
- char *name;
-};
-
-static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
-{
- offset <<= 2;
- return readl(up->port.membase + offset);
-}
-
-static inline void serial_out(struct uart_pxa_port *up, int offset, int value)
-{
- offset <<= 2;
- writel(value, up->port.membase + offset);
-}
-
-static void serial_pxa_enable_ms(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- up->ier |= UART_IER_MSI;
- serial_out(up, UART_IER, up->ier);
-}
-
-static void serial_pxa_stop_tx(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- if (up->ier & UART_IER_THRI) {
- up->ier &= ~UART_IER_THRI;
- serial_out(up, UART_IER, up->ier);
- }
-}
-
-static void serial_pxa_stop_rx(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- up->ier &= ~UART_IER_RLSI;
- up->port.read_status_mask &= ~UART_LSR_DR;
- serial_out(up, UART_IER, up->ier);
-}
-
-static inline void receive_chars(struct uart_pxa_port *up, int *status)
-{
- struct tty_struct *tty = up->port.state->port.tty;
- unsigned int ch, flag;
- int max_count = 256;
-
- do {
- ch = serial_in(up, UART_RX);
- flag = TTY_NORMAL;
- up->port.icount.rx++;
-
- if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
- UART_LSR_FE | UART_LSR_OE))) {
- /*
- * For statistics only
- */
- if (*status & UART_LSR_BI) {
- *status &= ~(UART_LSR_FE | UART_LSR_PE);
- up->port.icount.brk++;
- /*
- * We do the SysRQ and SAK checking
- * here because otherwise the break
- * may get masked by ignore_status_mask
- * or read_status_mask.
- */
- if (uart_handle_break(&up->port))
- goto ignore_char;
- } else if (*status & UART_LSR_PE)
- up->port.icount.parity++;
- else if (*status & UART_LSR_FE)
- up->port.icount.frame++;
- if (*status & UART_LSR_OE)
- up->port.icount.overrun++;
-
- /*
- * Mask off conditions which should be ignored.
- */
- *status &= up->port.read_status_mask;
-
-#ifdef CONFIG_SERIAL_PXA_CONSOLE
- if (up->port.line == up->port.cons->index) {
- /* Recover the break flag from console xmit */
- *status |= up->lsr_break_flag;
- up->lsr_break_flag = 0;
- }
-#endif
- if (*status & UART_LSR_BI) {
- flag = TTY_BREAK;
- } else if (*status & UART_LSR_PE)
- flag = TTY_PARITY;
- else if (*status & UART_LSR_FE)
- flag = TTY_FRAME;
- }
-
- if (uart_handle_sysrq_char(&up->port, ch))
- goto ignore_char;
-
- uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag);
-
- ignore_char:
- *status = serial_in(up, UART_LSR);
- } while ((*status & UART_LSR_DR) && (max_count-- > 0));
- tty_flip_buffer_push(tty);
-}
-
-static void transmit_chars(struct uart_pxa_port *up)
-{
- struct circ_buf *xmit = &up->port.state->xmit;
- int count;
-
- if (up->port.x_char) {
- serial_out(up, UART_TX, up->port.x_char);
- up->port.icount.tx++;
- up->port.x_char = 0;
- return;
- }
- if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
- serial_pxa_stop_tx(&up->port);
- return;
- }
-
- count = up->port.fifosize / 2;
- do {
- serial_out(up, UART_TX, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- up->port.icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- } while (--count > 0);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&up->port);
-
-
- if (uart_circ_empty(xmit))
- serial_pxa_stop_tx(&up->port);
-}
-
-static void serial_pxa_start_tx(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- if (!(up->ier & UART_IER_THRI)) {
- up->ier |= UART_IER_THRI;
- serial_out(up, UART_IER, up->ier);
- }
-}
-
-static inline void check_modem_status(struct uart_pxa_port *up)
-{
- int status;
-
- status = serial_in(up, UART_MSR);
-
- if ((status & UART_MSR_ANY_DELTA) == 0)
- return;
-
- if (status & UART_MSR_TERI)
- up->port.icount.rng++;
- if (status & UART_MSR_DDSR)
- up->port.icount.dsr++;
- if (status & UART_MSR_DDCD)
- uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
- if (status & UART_MSR_DCTS)
- uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
-
- wake_up_interruptible(&up->port.state->port.delta_msr_wait);
-}
-
-/*
- * This handles the interrupt from one port.
- */
-static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
-{
- struct uart_pxa_port *up = dev_id;
- unsigned int iir, lsr;
-
- iir = serial_in(up, UART_IIR);
- if (iir & UART_IIR_NO_INT)
- return IRQ_NONE;
- lsr = serial_in(up, UART_LSR);
- if (lsr & UART_LSR_DR)
- receive_chars(up, &lsr);
- check_modem_status(up);
- if (lsr & UART_LSR_THRE)
- transmit_chars(up);
- return IRQ_HANDLED;
-}
-
-static unsigned int serial_pxa_tx_empty(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
- unsigned int ret;
-
- spin_lock_irqsave(&up->port.lock, flags);
- ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return ret;
-}
-
-static unsigned int serial_pxa_get_mctrl(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned char status;
- unsigned int ret;
-
- status = serial_in(up, UART_MSR);
-
- ret = 0;
- if (status & UART_MSR_DCD)
- ret |= TIOCM_CAR;
- if (status & UART_MSR_RI)
- ret |= TIOCM_RNG;
- if (status & UART_MSR_DSR)
- ret |= TIOCM_DSR;
- if (status & UART_MSR_CTS)
- ret |= TIOCM_CTS;
- return ret;
-}
-
-static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned char mcr = 0;
-
- if (mctrl & TIOCM_RTS)
- mcr |= UART_MCR_RTS;
- if (mctrl & TIOCM_DTR)
- mcr |= UART_MCR_DTR;
- if (mctrl & TIOCM_OUT1)
- mcr |= UART_MCR_OUT1;
- if (mctrl & TIOCM_OUT2)
- mcr |= UART_MCR_OUT2;
- if (mctrl & TIOCM_LOOP)
- mcr |= UART_MCR_LOOP;
-
- mcr |= up->mcr;
-
- serial_out(up, UART_MCR, mcr);
-}
-
-static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
- if (break_state == -1)
- up->lcr |= UART_LCR_SBC;
- else
- up->lcr &= ~UART_LCR_SBC;
- serial_out(up, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-#if 0
-static void serial_pxa_dma_init(struct pxa_uart *up)
-{
- up->rxdma =
- pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_receive_dma, up);
- if (up->rxdma < 0)
- goto out;
- up->txdma =
- pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_transmit_dma, up);
- if (up->txdma < 0)
- goto err_txdma;
- up->dmadesc = kmalloc(4 * sizeof(pxa_dma_desc), GFP_KERNEL);
- if (!up->dmadesc)
- goto err_alloc;
-
- /* ... */
-err_alloc:
- pxa_free_dma(up->txdma);
-err_rxdma:
- pxa_free_dma(up->rxdma);
-out:
- return;
-}
-#endif
-
-static int serial_pxa_startup(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
- int retval;
-
- if (port->line == 3) /* HWUART */
- up->mcr |= UART_MCR_AFE;
- else
- up->mcr = 0;
-
- up->port.uartclk = clk_get_rate(up->clk);
-
- /*
- * Allocate the IRQ
- */
- retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up);
- if (retval)
- return retval;
-
- /*
- * Clear the FIFO buffers and disable them.
- * (they will be reenabled in set_termios())
- */
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
- serial_out(up, UART_FCR, 0);
-
- /*
- * Clear the interrupt registers.
- */
- (void) serial_in(up, UART_LSR);
- (void) serial_in(up, UART_RX);
- (void) serial_in(up, UART_IIR);
- (void) serial_in(up, UART_MSR);
-
- /*
- * Now, initialize the UART
- */
- serial_out(up, UART_LCR, UART_LCR_WLEN8);
-
- spin_lock_irqsave(&up->port.lock, flags);
- up->port.mctrl |= TIOCM_OUT2;
- serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /*
- * Finally, enable interrupts. Note: Modem status interrupts
- * are set via set_termios(), which will be occurring imminently
- * anyway, so we don't enable them here.
- */
- up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE;
- serial_out(up, UART_IER, up->ier);
-
- /*
- * And clear the interrupt registers again for luck.
- */
- (void) serial_in(up, UART_LSR);
- (void) serial_in(up, UART_RX);
- (void) serial_in(up, UART_IIR);
- (void) serial_in(up, UART_MSR);
-
- return 0;
-}
-
-static void serial_pxa_shutdown(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned long flags;
-
- free_irq(up->port.irq, up);
-
- /*
- * Disable interrupts from this port
- */
- up->ier = 0;
- serial_out(up, UART_IER, 0);
-
- spin_lock_irqsave(&up->port.lock, flags);
- up->port.mctrl &= ~TIOCM_OUT2;
- serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /*
- * Disable break condition and FIFOs
- */
- serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT);
- serial_out(up, UART_FCR, 0);
-}
-
-static void
-serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- unsigned char cval, fcr = 0;
- unsigned long flags;
- unsigned int baud, quot;
- unsigned int dll;
-
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- cval = UART_LCR_WLEN5;
- break;
- case CS6:
- cval = UART_LCR_WLEN6;
- break;
- case CS7:
- cval = UART_LCR_WLEN7;
- break;
- default:
- case CS8:
- cval = UART_LCR_WLEN8;
- break;
- }
-
- if (termios->c_cflag & CSTOPB)
- cval |= UART_LCR_STOP;
- if (termios->c_cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(termios->c_cflag & PARODD))
- cval |= UART_LCR_EPAR;
-
- /*
- * Ask the core to calculate the divisor for us.
- */
- baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
- quot = uart_get_divisor(port, baud);
-
- if ((up->port.uartclk / quot) < (2400 * 16))
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1;
- else if ((up->port.uartclk / quot) < (230400 * 16))
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8;
- else
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32;
-
- /*
- * Ok, we're now changing the port state. Do it with
- * interrupts disabled.
- */
- spin_lock_irqsave(&up->port.lock, flags);
-
- /*
- * Ensure the port will be enabled.
- * This is required especially for serial console.
- */
- up->ier |= UART_IER_UUE;
-
- /*
- * Update the per-port timeout.
- */
- uart_update_timeout(port, termios->c_cflag, baud);
-
- up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (termios->c_iflag & INPCK)
- up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (termios->c_iflag & (BRKINT | PARMRK))
- up->port.read_status_mask |= UART_LSR_BI;
-
- /*
- * Characters to ignore
- */
- up->port.ignore_status_mask = 0;
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
- if (termios->c_iflag & IGNBRK) {
- up->port.ignore_status_mask |= UART_LSR_BI;
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too (for real raw support).
- */
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_OE;
- }
-
- /*
- * ignore all characters if CREAD is not set
- */
- if ((termios->c_cflag & CREAD) == 0)
- up->port.ignore_status_mask |= UART_LSR_DR;
-
- /*
- * CTS flow control flag and modem status interrupts
- */
- up->ier &= ~UART_IER_MSI;
- if (UART_ENABLE_MS(&up->port, termios->c_cflag))
- up->ier |= UART_IER_MSI;
-
- serial_out(up, UART_IER, up->ier);
-
- if (termios->c_cflag & CRTSCTS)
- up->mcr |= UART_MCR_AFE;
- else
- up->mcr &= ~UART_MCR_AFE;
-
- serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
- serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */
-
- /*
- * work around Errata #75 according to Intel(R) PXA27x Processor Family
- * Specification Update (Nov 2005)
- */
- dll = serial_in(up, UART_DLL);
- WARN_ON(dll != (quot & 0xff));
-
- serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */
- serial_out(up, UART_LCR, cval); /* reset DLAB */
- up->lcr = cval; /* Save LCR */
- serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- serial_out(up, UART_FCR, fcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static void
-serial_pxa_pm(struct uart_port *port, unsigned int state,
- unsigned int oldstate)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- if (!state)
- clk_enable(up->clk);
- else
- clk_disable(up->clk);
-}
-
-static void serial_pxa_release_port(struct uart_port *port)
-{
-}
-
-static int serial_pxa_request_port(struct uart_port *port)
-{
- return 0;
-}
-
-static void serial_pxa_config_port(struct uart_port *port, int flags)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- up->port.type = PORT_PXA;
-}
-
-static int
-serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- /* we don't want the core code to modify any port params */
- return -EINVAL;
-}
-
-static const char *
-serial_pxa_type(struct uart_port *port)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- return up->name;
-}
-
-static struct uart_pxa_port *serial_pxa_ports[4];
-static struct uart_driver serial_pxa_reg;
-
-#ifdef CONFIG_SERIAL_PXA_CONSOLE
-
-#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
-
-/*
- * Wait for transmitter & holding register to empty
- */
-static inline void wait_for_xmitr(struct uart_pxa_port *up)
-{
- unsigned int status, tmout = 10000;
-
- /* Wait up to 10ms for the character(s) to be sent. */
- do {
- status = serial_in(up, UART_LSR);
-
- if (status & UART_LSR_BI)
- up->lsr_break_flag = UART_LSR_BI;
-
- if (--tmout == 0)
- break;
- udelay(1);
- } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
-
- /* Wait up to 1s for flow control if necessary */
- if (up->port.flags & UPF_CONS_FLOW) {
- tmout = 1000000;
- while (--tmout &&
- ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
- udelay(1);
- }
-}
-
-static void serial_pxa_console_putchar(struct uart_port *port, int ch)
-{
- struct uart_pxa_port *up = (struct uart_pxa_port *)port;
-
- wait_for_xmitr(up);
- serial_out(up, UART_TX, ch);
-}
-
-/*
- * Print a string to the serial port trying not to disturb
- * any possible real use of the port...
- *
- * The console_lock must be held when we get here.
- */
-static void
-serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
-{
- struct uart_pxa_port *up = serial_pxa_ports[co->index];
- unsigned int ier;
-
- clk_enable(up->clk);
-
- /*
- * First save the IER then disable the interrupts
- */
- ier = serial_in(up, UART_IER);
- serial_out(up, UART_IER, UART_IER_UUE);
-
- uart_console_write(&up->port, s, count, serial_pxa_console_putchar);
-
- /*
- * Finally, wait for transmitter to become empty
- * and restore the IER
- */
- wait_for_xmitr(up);
- serial_out(up, UART_IER, ier);
-
- clk_disable(up->clk);
-}
-
-static int __init
-serial_pxa_console_setup(struct console *co, char *options)
-{
- struct uart_pxa_port *up;
- int baud = 9600;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
-
- if (co->index == -1 || co->index >= serial_pxa_reg.nr)
- co->index = 0;
- up = serial_pxa_ports[co->index];
- if (!up)
- return -ENODEV;
-
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
-
- return uart_set_options(&up->port, co, baud, parity, bits, flow);
-}
-
-static struct console serial_pxa_console = {
- .name = "ttyS",
- .write = serial_pxa_console_write,
- .device = uart_console_device,
- .setup = serial_pxa_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &serial_pxa_reg,
-};
-
-#define PXA_CONSOLE &serial_pxa_console
-#else
-#define PXA_CONSOLE NULL
-#endif
-
-struct uart_ops serial_pxa_pops = {
- .tx_empty = serial_pxa_tx_empty,
- .set_mctrl = serial_pxa_set_mctrl,
- .get_mctrl = serial_pxa_get_mctrl,
- .stop_tx = serial_pxa_stop_tx,
- .start_tx = serial_pxa_start_tx,
- .stop_rx = serial_pxa_stop_rx,
- .enable_ms = serial_pxa_enable_ms,
- .break_ctl = serial_pxa_break_ctl,
- .startup = serial_pxa_startup,
- .shutdown = serial_pxa_shutdown,
- .set_termios = serial_pxa_set_termios,
- .pm = serial_pxa_pm,
- .type = serial_pxa_type,
- .release_port = serial_pxa_release_port,
- .request_port = serial_pxa_request_port,
- .config_port = serial_pxa_config_port,
- .verify_port = serial_pxa_verify_port,
-};
-
-static struct uart_driver serial_pxa_reg = {
- .owner = THIS_MODULE,
- .driver_name = "PXA serial",
- .dev_name = "ttyS",
- .major = TTY_MAJOR,
- .minor = 64,
- .nr = 4,
- .cons = PXA_CONSOLE,
-};
-
-#ifdef CONFIG_PM
-static int serial_pxa_suspend(struct device *dev)
-{
- struct uart_pxa_port *sport = dev_get_drvdata(dev);
-
- if (sport)
- uart_suspend_port(&serial_pxa_reg, &sport->port);
-
- return 0;
-}
-
-static int serial_pxa_resume(struct device *dev)
-{
- struct uart_pxa_port *sport = dev_get_drvdata(dev);
-
- if (sport)
- uart_resume_port(&serial_pxa_reg, &sport->port);
-
- return 0;
-}
-
-static const struct dev_pm_ops serial_pxa_pm_ops = {
- .suspend = serial_pxa_suspend,
- .resume = serial_pxa_resume,
-};
-#endif
-
-static int serial_pxa_probe(struct platform_device *dev)
-{
- struct uart_pxa_port *sport;
- struct resource *mmres, *irqres;
- int ret;
-
- mmres = platform_get_resource(dev, IORESOURCE_MEM, 0);
- irqres = platform_get_resource(dev, IORESOURCE_IRQ, 0);
- if (!mmres || !irqres)
- return -ENODEV;
-
- sport = kzalloc(sizeof(struct uart_pxa_port), GFP_KERNEL);
- if (!sport)
- return -ENOMEM;
-
- sport->clk = clk_get(&dev->dev, NULL);
- if (IS_ERR(sport->clk)) {
- ret = PTR_ERR(sport->clk);
- goto err_free;
- }
-
- sport->port.type = PORT_PXA;
- sport->port.iotype = UPIO_MEM;
- sport->port.mapbase = mmres->start;
- sport->port.irq = irqres->start;
- sport->port.fifosize = 64;
- sport->port.ops = &serial_pxa_pops;
- sport->port.line = dev->id;
- sport->port.dev = &dev->dev;
- sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
- sport->port.uartclk = clk_get_rate(sport->clk);
-
- switch (dev->id) {
- case 0: sport->name = "FFUART"; break;
- case 1: sport->name = "BTUART"; break;
- case 2: sport->name = "STUART"; break;
- case 3: sport->name = "HWUART"; break;
- default:
- sport->name = "???";
- break;
- }
-
- sport->port.membase = ioremap(mmres->start, mmres->end - mmres->start + 1);
- if (!sport->port.membase) {
- ret = -ENOMEM;
- goto err_clk;
- }
-
- serial_pxa_ports[dev->id] = sport;
-
- uart_add_one_port(&serial_pxa_reg, &sport->port);
- platform_set_drvdata(dev, sport);
-
- return 0;
-
- err_clk:
- clk_put(sport->clk);
- err_free:
- kfree(sport);
- return ret;
-}
-
-static int serial_pxa_remove(struct platform_device *dev)
-{
- struct uart_pxa_port *sport = platform_get_drvdata(dev);
-
- platform_set_drvdata(dev, NULL);
-
- uart_remove_one_port(&serial_pxa_reg, &sport->port);
- clk_put(sport->clk);
- kfree(sport);
-
- return 0;
-}
-
-static struct platform_driver serial_pxa_driver = {
- .probe = serial_pxa_probe,
- .remove = serial_pxa_remove,
-
- .driver = {
- .name = "pxa2xx-uart",
- .owner = THIS_MODULE,
-#ifdef CONFIG_PM
- .pm = &serial_pxa_pm_ops,
-#endif
- },
-};
-
-int __init serial_pxa_init(void)
-{
- int ret;
-
- ret = uart_register_driver(&serial_pxa_reg);
- if (ret != 0)
- return ret;
-
- ret = platform_driver_register(&serial_pxa_driver);
- if (ret != 0)
- uart_unregister_driver(&serial_pxa_reg);
-
- return ret;
-}
-
-void __exit serial_pxa_exit(void)
-{
- platform_driver_unregister(&serial_pxa_driver);
- uart_unregister_driver(&serial_pxa_reg);
-}
-
-module_init(serial_pxa_init);
-module_exit(serial_pxa_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:pxa2xx-uart");
generated by cgit v1.2.3 (git 2.0.4) at 2024-12-28 07:32:54 +0000