/*
- * drivers/serial/mpc52xx_uart.c
- *
* Driver for the PSC of the Freescale MPC52xx PSCs configured as UARTs.
*
* FIXME According to the usermanual the status bits in the status register
*
*
* Maintainer : Sylvain Munaut <tnt@246tNt.com>
- *
+ *
* Some of the code has been inspired/copied from the 2.4 code written
* by Dale Farnsworth <dfarnsworth@mvista.com>.
- *
- * Copyright (C) 2004-2005 Sylvain Munaut <tnt@246tNt.com>
+ *
+ * Copyright (C) 2006 Secret Lab Technologies Ltd.
+ * Grant Likely <grant.likely@secretlab.ca>
+ * Copyright (C) 2004-2006 Sylvain Munaut <tnt@246tNt.com>
* Copyright (C) 2003 MontaVista, Software, Inc.
- *
+ *
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
-
+
/* Platform device Usage :
*
* Since PSCs can have multiple function, the correct driver for each one
* and so on). So the PSC1 is mapped to /dev/ttyPSC0, PSC2 to /dev/ttyPSC1 and
* so on. But be warned, it's an ABSOLUTE REQUIREMENT ! This is needed mainly
* fpr the console code : without this 1:1 mapping, at early boot time, when we
- * are parsing the kernel args console=ttyPSC?, we wouldn't know wich PSC it
+ * are parsing the kernel args console=ttyPSC?, we wouldn't know which PSC it
* will be mapped to.
*/
-#include <linux/config.h>
-#include <linux/platform_device.h>
+/* OF Platform device Usage :
+ *
+ * This driver is only used for PSCs configured in uart mode. The device
+ * tree will have a node for each PSC in uart mode w/ device_type = "serial"
+ * and "mpc52xx-psc-uart" in the compatible string
+ *
+ * By default, PSC devices are enumerated in the order they are found. However
+ * a particular PSC number can be forces by adding 'device_no = <port#>'
+ * to the device node.
+ *
+ * The driver init all necessary registers to place the PSC in uart mode without
+ * DCD. However, the pin multiplexing aren't changed and should be set either
+ * by the bootloader or in the platform init code.
+ */
+
+#undef DEBUG
+
+#include <linux/device.h>
#include <linux/module.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <asm/delay.h>
#include <asm/io.h>
+#if defined(CONFIG_PPC_MERGE)
+#include <asm/of_platform.h>
+#else
+#include <linux/platform_device.h>
+#endif
+
#include <asm/mpc52xx.h>
#include <asm/mpc52xx_psc.h>
* it's cleared, then a memset(...,0,...) should be added to
* the console_init
*/
+#if defined(CONFIG_PPC_MERGE)
+/* lookup table for matching device nodes to index numbers */
+static struct device_node *mpc52xx_uart_nodes[MPC52xx_PSC_MAXNUM];
+
+static void mpc52xx_uart_of_enumerate(void);
+#endif
#define PSC(port) ((struct mpc52xx_psc __iomem *)((port)->membase))
/* Forward declaration of the interruption handling routine */
-static irqreturn_t mpc52xx_uart_int(int irq,void *dev_id,struct pt_regs *regs);
+static irqreturn_t mpc52xx_uart_int(int irq,void *dev_id);
/* Simple macro to test if a port is console or not. This one is taken
#define uart_console(port) (0)
#endif
+#if defined(CONFIG_PPC_MERGE)
+static struct of_device_id mpc52xx_uart_of_match[] = {
+ { .type = "serial", .compatible = "mpc52xx-psc-uart", },
+ { .type = "serial", .compatible = "mpc5200-psc", }, /* Efika only! */
+ {},
+};
+#endif
+
/* ======================================================================== */
/* UART operations */
/* ======================================================================== */
-static unsigned int
+static unsigned int
mpc52xx_uart_tx_empty(struct uart_port *port)
{
int status = in_be16(&PSC(port)->mpc52xx_psc_status);
return (status & MPC52xx_PSC_SR_TXEMP) ? TIOCSER_TEMT : 0;
}
-static void
+static void
mpc52xx_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
/* Not implemented */
}
-static unsigned int
+static unsigned int
mpc52xx_uart_get_mctrl(struct uart_port *port)
{
/* Not implemented */
return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
}
-static void
+static void
mpc52xx_uart_stop_tx(struct uart_port *port)
{
/* port->lock taken by caller */
out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
}
-static void
+static void
mpc52xx_uart_start_tx(struct uart_port *port)
{
/* port->lock taken by caller */
out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
}
-static void
+static void
mpc52xx_uart_send_xchar(struct uart_port *port, char ch)
{
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
-
+
port->x_char = ch;
if (ch) {
/* Make sure tx interrupts are on */
port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
}
-
+
spin_unlock_irqrestore(&port->lock, flags);
}
out_8(&PSC(port)->command,MPC52xx_PSC_START_BRK);
else
out_8(&PSC(port)->command,MPC52xx_PSC_STOP_BRK);
-
+
spin_unlock_irqrestore(&port->lock, flags);
}
/* Request IRQ */
ret = request_irq(port->irq, mpc52xx_uart_int,
- SA_INTERRUPT | SA_SAMPLE_RANDOM, "mpc52xx_psc_uart", port);
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "mpc52xx_psc_uart", port);
if (ret)
return ret;
/* Reset/activate the port, clear and enable interrupts */
out_8(&psc->command,MPC52xx_PSC_RST_RX);
out_8(&psc->command,MPC52xx_PSC_RST_TX);
-
+
out_be32(&psc->sicr,0); /* UART mode DCD ignored */
out_be16(&psc->mpc52xx_psc_clock_select, 0xdd00); /* /16 prescaler on */
-
+
out_8(&psc->rfcntl, 0x00);
out_be16(&psc->rfalarm, 0x1ff);
out_8(&psc->tfcntl, 0x07);
port->read_status_mask |= MPC52xx_PSC_IMR_RXRDY | MPC52xx_PSC_IMR_TXRDY;
out_be16(&psc->mpc52xx_psc_imr,port->read_status_mask);
-
+
out_8(&psc->command,MPC52xx_PSC_TX_ENABLE);
out_8(&psc->command,MPC52xx_PSC_RX_ENABLE);
-
+
return 0;
}
mpc52xx_uart_shutdown(struct uart_port *port)
{
struct mpc52xx_psc __iomem *psc = PSC(port);
-
+
/* Shut down the port, interrupt and all */
out_8(&psc->command,MPC52xx_PSC_RST_RX);
out_8(&psc->command,MPC52xx_PSC_RST_TX);
-
- port->read_status_mask = 0;
+
+ port->read_status_mask = 0;
out_be16(&psc->mpc52xx_psc_imr,port->read_status_mask);
/* Release interrupt */
free_irq(port->irq, port);
}
-static void
-mpc52xx_uart_set_termios(struct uart_port *port, struct termios *new,
- struct termios *old)
+static void
+mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
+ struct ktermios *old)
{
struct mpc52xx_psc __iomem *psc = PSC(port);
unsigned long flags;
unsigned char mr1, mr2;
unsigned short ctr;
unsigned int j, baud, quot;
-
+
/* Prepare what we're gonna write */
mr1 = 0;
-
+
switch (new->c_cflag & CSIZE) {
case CS5: mr1 |= MPC52xx_PSC_MODE_5_BITS;
break;
MPC52xx_PSC_MODE_PARODD : MPC52xx_PSC_MODE_PAREVEN;
} else
mr1 |= MPC52xx_PSC_MODE_PARNONE;
-
-
+
+
mr2 = 0;
if (new->c_cflag & CSTOPB)
baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16);
quot = uart_get_divisor(port, baud);
ctr = quot & 0xffff;
-
+
/* Get the lock */
spin_lock_irqsave(&port->lock, flags);
* boot for the console, all stuff is not yet ready to receive at that
* time and that just makes the kernel oops */
/* while (j-- && mpc52xx_uart_int_rx_chars(port)); */
- while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
+ while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
--j)
udelay(1);
if (!j)
printk( KERN_ERR "mpc52xx_uart.c: "
"Unable to flush RX & TX fifos in-time in set_termios."
- "Some chars may have been lost.\n" );
+ "Some chars may have been lost.\n" );
/* Reset the TX & RX */
out_8(&psc->command,MPC52xx_PSC_RST_RX);
out_8(&psc->mode,mr2);
out_8(&psc->ctur,ctr >> 8);
out_8(&psc->ctlr,ctr & 0xff);
-
+
/* Reenable TX & RX */
out_8(&psc->command,MPC52xx_PSC_TX_ENABLE);
out_8(&psc->command,MPC52xx_PSC_RX_ENABLE);
port->membase = NULL;
}
- release_mem_region(port->mapbase, MPC52xx_PSC_SIZE);
+ release_mem_region(port->mapbase, sizeof(struct mpc52xx_psc));
}
static int
mpc52xx_uart_request_port(struct uart_port *port)
{
+ int err;
+
if (port->flags & UPF_IOREMAP) /* Need to remap ? */
- port->membase = ioremap(port->mapbase, MPC52xx_PSC_SIZE);
+ port->membase = ioremap(port->mapbase,
+ sizeof(struct mpc52xx_psc));
if (!port->membase)
return -EINVAL;
- return request_mem_region(port->mapbase, MPC52xx_PSC_SIZE,
+ err = request_mem_region(port->mapbase, sizeof(struct mpc52xx_psc),
"mpc52xx_psc_uart") != NULL ? 0 : -EBUSY;
+
+ if (err && (port->flags & UPF_IOREMAP)) {
+ iounmap(port->membase);
+ port->membase = NULL;
+ }
+
+ return err;
}
static void
if ( (ser->irq != port->irq) ||
(ser->io_type != SERIAL_IO_MEM) ||
- (ser->baud_base != port->uartclk) ||
+ (ser->baud_base != port->uartclk) ||
(ser->iomem_base != (void*)port->mapbase) ||
(ser->hub6 != 0 ) )
return -EINVAL;
.verify_port = mpc52xx_uart_verify_port
};
-
+
/* ======================================================================== */
/* Interrupt handling */
/* ======================================================================== */
-
+
static inline int
-mpc52xx_uart_int_rx_chars(struct uart_port *port, struct pt_regs *regs)
+mpc52xx_uart_int_rx_chars(struct uart_port *port)
{
struct tty_struct *tty = port->info->tty;
unsigned char ch, flag;
/* Handle sysreq char */
#ifdef SUPPORT_SYSRQ
- if (uart_handle_sysrq_char(port, ch, regs)) {
+ if (uart_handle_sysrq_char(port, ch)) {
port->sysrq = 0;
continue;
}
flag = TTY_NORMAL;
port->icount.rx++;
-
+
if ( status & (MPC52xx_PSC_SR_PE |
MPC52xx_PSC_SR_FE |
MPC52xx_PSC_SR_RB) ) {
-
+
if (status & MPC52xx_PSC_SR_RB) {
flag = TTY_BREAK;
uart_handle_break(port);
}
tty_flip_buffer_push(tty);
-
+
return in_be16(&PSC(port)->mpc52xx_psc_status) & MPC52xx_PSC_SR_RXRDY;
}
return 1;
}
-static irqreturn_t
-mpc52xx_uart_int(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t
+mpc52xx_uart_int(int irq, void *dev_id)
{
- struct uart_port *port = (struct uart_port *) dev_id;
+ struct uart_port *port = dev_id;
unsigned long pass = ISR_PASS_LIMIT;
unsigned int keepgoing;
unsigned short status;
-
- if ( irq != port->irq ) {
- printk( KERN_WARNING
- "mpc52xx_uart_int : " \
- "Received wrong int %d. Waiting for %d\n",
- irq, port->irq);
- return IRQ_NONE;
- }
-
+
spin_lock(&port->lock);
-
+
/* While we have stuff to do, we continue */
do {
/* If we don't find anything to do, we stop */
- keepgoing = 0;
-
+ keepgoing = 0;
+
/* Read status */
status = in_be16(&PSC(port)->mpc52xx_psc_isr);
status &= port->read_status_mask;
-
+
/* Do we need to receive chars ? */
/* For this RX interrupts must be on and some chars waiting */
if ( status & MPC52xx_PSC_IMR_RXRDY )
- keepgoing |= mpc52xx_uart_int_rx_chars(port, regs);
+ keepgoing |= mpc52xx_uart_int_rx_chars(port);
/* Do we need to send chars ? */
/* For this, TX must be ready and TX interrupt enabled */
if ( status & MPC52xx_PSC_IMR_TXRDY )
keepgoing |= mpc52xx_uart_int_tx_chars(port);
-
+
/* Limit number of iteration */
if ( !(--pass) )
keepgoing = 0;
} while (keepgoing);
-
+
spin_unlock(&port->lock);
-
+
return IRQ_HANDLED;
}
struct mpc52xx_psc __iomem *psc = PSC(port);
unsigned char mr1;
+ pr_debug("mpc52xx_console_get_options(port=%p)\n", port);
+
/* Read the mode registers */
out_8(&psc->command,MPC52xx_PSC_SEL_MODE_REG_1);
mr1 = in_8(&psc->mode);
-
+
/* CT{U,L}R are write-only ! */
- *baud = __res.bi_baudrate ?
- __res.bi_baudrate : CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD;
+ *baud = CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD;
+#if !defined(CONFIG_PPC_MERGE)
+ if (__res.bi_baudrate)
+ *baud = __res.bi_baudrate;
+#endif
/* Parse them */
switch (mr1 & MPC52xx_PSC_MODE_BITS_MASK) {
case MPC52xx_PSC_MODE_8_BITS:
default: *bits = 8;
}
-
+
if (mr1 & MPC52xx_PSC_MODE_PARNONE)
*parity = 'n';
else
*parity = mr1 & MPC52xx_PSC_MODE_PARODD ? 'o' : 'e';
}
-static void
+static void
mpc52xx_console_write(struct console *co, const char *s, unsigned int count)
{
struct uart_port *port = &mpc52xx_uart_ports[co->index];
struct mpc52xx_psc __iomem *psc = PSC(port);
unsigned int i, j;
-
+
/* Disable interrupts */
out_be16(&psc->mpc52xx_psc_imr, 0);
/* Wait the TX buffer to be empty */
- j = 5000000; /* Maximum wait */
- while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
+ j = 5000000; /* Maximum wait */
+ while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
--j)
udelay(1);
/* Write all the chars */
- for ( i=0 ; i<count ; i++ ) {
-
+ for (i = 0; i < count; i++, s++) {
+ /* Line return handling */
+ if (*s == '\n')
+ out_8(&psc->mpc52xx_psc_buffer_8, '\r');
+
/* Send the char */
out_8(&psc->mpc52xx_psc_buffer_8, *s);
- /* Line return handling */
- if ( *s++ == '\n' )
- out_8(&psc->mpc52xx_psc_buffer_8, '\r');
-
/* Wait the TX buffer to be empty */
- j = 20000; /* Maximum wait */
- while (!(in_be16(&psc->mpc52xx_psc_status) &
+ j = 20000; /* Maximum wait */
+ while (!(in_be16(&psc->mpc52xx_psc_status) &
MPC52xx_PSC_SR_TXEMP) && --j)
udelay(1);
}
out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask);
}
+#if !defined(CONFIG_PPC_MERGE)
static int __init
mpc52xx_console_setup(struct console *co, char *options)
{
if (co->index < 0 || co->index >= MPC52xx_PSC_MAXNUM)
return -EINVAL;
-
+
/* Basic port init. Needed since we use some uart_??? func before
* real init for early access */
spin_lock_init(&port->lock);
return uart_set_options(port, co, baud, parity, bits, flow);
}
+#else
+
+static int __init
+mpc52xx_console_setup(struct console *co, char *options)
+{
+ struct uart_port *port = &mpc52xx_uart_ports[co->index];
+ struct device_node *np = mpc52xx_uart_nodes[co->index];
+ unsigned int ipb_freq;
+ struct resource res;
+ int ret;
+
+ int baud = CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD;
+ int bits = 8;
+ int parity = 'n';
+ int flow = 'n';
+
+ pr_debug("mpc52xx_console_setup co=%p, co->index=%i, options=%s\n",
+ co, co->index, options);
+
+ if ((co->index < 0) || (co->index > MPC52xx_PSC_MAXNUM)) {
+ pr_debug("PSC%x out of range\n", co->index);
+ return -EINVAL;
+ }
+
+ if (!np) {
+ pr_debug("PSC%x not found in device tree\n", co->index);
+ return -EINVAL;
+ }
+
+ pr_debug("Console on ttyPSC%x is %s\n",
+ co->index, mpc52xx_uart_nodes[co->index]->full_name);
+
+ /* Fetch register locations */
+ if ((ret = of_address_to_resource(np, 0, &res)) != 0) {
+ pr_debug("Could not get resources for PSC%x\n", co->index);
+ return ret;
+ }
+
+ /* Search for bus-frequency property in this node or a parent */
+ if ((ipb_freq = mpc52xx_find_ipb_freq(np)) == 0) {
+ pr_debug("Could not find IPB bus frequency!\n");
+ return -EINVAL;
+ }
+
+ /* Basic port init. Needed since we use some uart_??? func before
+ * real init for early access */
+ spin_lock_init(&port->lock);
+ port->uartclk = ipb_freq / 2;
+ port->ops = &mpc52xx_uart_ops;
+ port->mapbase = res.start;
+ port->membase = ioremap(res.start, sizeof(struct mpc52xx_psc));
+ port->irq = irq_of_parse_and_map(np, 0);
+
+ if (port->membase == NULL)
+ return -EINVAL;
+
+ pr_debug("mpc52xx-psc uart at %lx, mapped to %p, irq=%x, freq=%i\n",
+ port->mapbase, port->membase, port->irq, port->uartclk);
+
+ /* Setup the port parameters accoding to options */
+ if (options)
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+ else
+ mpc52xx_console_get_options(port, &baud, &parity, &bits, &flow);
+
+ pr_debug("Setting console parameters: %i %i%c1 flow=%c\n",
+ baud, bits, parity, flow);
+
+ return uart_set_options(port, co, baud, parity, bits, flow);
+}
+#endif /* defined(CONFIG_PPC_MERGE) */
+
static struct uart_driver mpc52xx_uart_driver;
.data = &mpc52xx_uart_driver,
};
-
-static int __init
+
+static int __init
mpc52xx_console_init(void)
{
+#if defined(CONFIG_PPC_MERGE)
+ mpc52xx_uart_of_enumerate();
+#endif
register_console(&mpc52xx_console);
return 0;
}
.owner = THIS_MODULE,
.driver_name = "mpc52xx_psc_uart",
.dev_name = "ttyPSC",
- .devfs_name = "ttyPSC",
.major = SERIAL_PSC_MAJOR,
.minor = SERIAL_PSC_MINOR,
.nr = MPC52xx_PSC_MAXNUM,
};
+#if !defined(CONFIG_PPC_MERGE)
/* ======================================================================== */
/* Platform Driver */
/* ======================================================================== */
/* Init the port structure */
port = &mpc52xx_uart_ports[idx];
- memset(port, 0x00, sizeof(struct uart_port));
-
spin_lock_init(&port->lock);
port->uartclk = __res.bi_ipbfreq / 2; /* Look at CTLR doc */
- port->fifosize = 255; /* Should be 512 ! But it can't be */
- /* stored in a unsigned char */
+ port->fifosize = 512;
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF |
( uart_console(port) ? 0 : UPF_IOREMAP );
port->line = idx;
port->ops = &mpc52xx_uart_ops;
+ port->dev = &dev->dev;
/* Search for IRQ and mapbase */
for (i=0 ; i<dev->num_resources ; i++, res++) {
{
struct uart_port *port = (struct uart_port *) platform_get_drvdata(dev);
- if (sport)
+ if (port)
uart_suspend_port(&mpc52xx_uart_driver, port);
return 0;
}
#endif
+
static struct platform_driver mpc52xx_uart_platform_driver = {
.probe = mpc52xx_uart_probe,
.remove = mpc52xx_uart_remove,
.name = "mpc52xx-psc",
},
};
+#endif /* !defined(CONFIG_PPC_MERGE) */
+
+
+#if defined(CONFIG_PPC_MERGE)
+/* ======================================================================== */
+/* OF Platform Driver */
+/* ======================================================================== */
+
+static int __devinit
+mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
+{
+ int idx = -1;
+ unsigned int ipb_freq;
+ struct uart_port *port = NULL;
+ struct resource res;
+ int ret;
+
+ dev_dbg(&op->dev, "mpc52xx_uart_probe(op=%p, match=%p)\n", op, match);
+
+ /* Check validity & presence */
+ for (idx = 0; idx < MPC52xx_PSC_MAXNUM; idx++)
+ if (mpc52xx_uart_nodes[idx] == op->node)
+ break;
+ if (idx >= MPC52xx_PSC_MAXNUM)
+ return -EINVAL;
+ pr_debug("Found %s assigned to ttyPSC%x\n",
+ mpc52xx_uart_nodes[idx]->full_name, idx);
+
+ /* Search for bus-frequency property in this node or a parent */
+ if ((ipb_freq = mpc52xx_find_ipb_freq(op->node)) == 0) {
+ dev_dbg(&op->dev, "Could not find IPB bus frequency!\n");
+ return -EINVAL;
+ }
+
+ /* Init the port structure */
+ port = &mpc52xx_uart_ports[idx];
+
+ spin_lock_init(&port->lock);
+ port->uartclk = ipb_freq / 2;
+ port->fifosize = 512;
+ port->iotype = UPIO_MEM;
+ port->flags = UPF_BOOT_AUTOCONF |
+ ( uart_console(port) ? 0 : UPF_IOREMAP );
+ port->line = idx;
+ port->ops = &mpc52xx_uart_ops;
+ port->dev = &op->dev;
+
+ /* Search for IRQ and mapbase */
+ if ((ret = of_address_to_resource(op->node, 0, &res)) != 0)
+ return ret;
+
+ port->mapbase = res.start;
+ port->irq = irq_of_parse_and_map(op->node, 0);
+
+ dev_dbg(&op->dev, "mpc52xx-psc uart at %lx, irq=%x, freq=%i\n",
+ port->mapbase, port->irq, port->uartclk);
+
+ if ((port->irq==NO_IRQ) || !port->mapbase) {
+ printk(KERN_ERR "Could not allocate resources for PSC\n");
+ return -EINVAL;
+ }
+
+ /* Add the port to the uart sub-system */
+ ret = uart_add_one_port(&mpc52xx_uart_driver, port);
+ if (!ret)
+ dev_set_drvdata(&op->dev, (void*)port);
+
+ return ret;
+}
+
+static int
+mpc52xx_uart_of_remove(struct of_device *op)
+{
+ struct uart_port *port = dev_get_drvdata(&op->dev);
+ dev_set_drvdata(&op->dev, NULL);
+
+ if (port)
+ uart_remove_one_port(&mpc52xx_uart_driver, port);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int
+mpc52xx_uart_of_suspend(struct of_device *op, pm_message_t state)
+{
+ struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev);
+
+ if (port)
+ uart_suspend_port(&mpc52xx_uart_driver, port);
+
+ return 0;
+}
+
+static int
+mpc52xx_uart_of_resume(struct of_device *op)
+{
+ struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev);
+
+ if (port)
+ uart_resume_port(&mpc52xx_uart_driver, port);
+
+ return 0;
+}
+#endif
+
+static void
+mpc52xx_uart_of_assign(struct device_node *np, int idx)
+{
+ int free_idx = -1;
+ int i;
+
+ /* Find the first free node */
+ for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) {
+ if (mpc52xx_uart_nodes[i] == NULL) {
+ free_idx = i;
+ break;
+ }
+ }
+
+ if ((idx < 0) || (idx >= MPC52xx_PSC_MAXNUM))
+ idx = free_idx;
+
+ if (idx < 0)
+ return; /* No free slot; abort */
+
+ /* If the slot is already occupied, then swap slots */
+ if (mpc52xx_uart_nodes[idx] && (free_idx != -1))
+ mpc52xx_uart_nodes[free_idx] = mpc52xx_uart_nodes[idx];
+ mpc52xx_uart_nodes[i] = np;
+}
+
+static void
+mpc52xx_uart_of_enumerate(void)
+{
+ static int enum_done = 0;
+ struct device_node *np;
+ const unsigned int *devno;
+ int i;
+
+ if (enum_done)
+ return;
+
+ for_each_node_by_type(np, "serial") {
+ if (!of_match_node(mpc52xx_uart_of_match, np))
+ continue;
+
+ /* Is a particular device number requested? */
+ devno = get_property(np, "device_no", NULL);
+ mpc52xx_uart_of_assign(of_node_get(np), devno ? *devno : -1);
+ }
+
+ enum_done = 1;
+
+ for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) {
+ if (mpc52xx_uart_nodes[i])
+ pr_debug("%s assigned to ttyPSC%x\n",
+ mpc52xx_uart_nodes[i]->full_name, i);
+ }
+}
+
+MODULE_DEVICE_TABLE(of, mpc52xx_uart_of_match);
+
+static struct of_platform_driver mpc52xx_uart_of_driver = {
+ .owner = THIS_MODULE,
+ .name = "mpc52xx-psc-uart",
+ .match_table = mpc52xx_uart_of_match,
+ .probe = mpc52xx_uart_of_probe,
+ .remove = mpc52xx_uart_of_remove,
+#ifdef CONFIG_PM
+ .suspend = mpc52xx_uart_of_suspend,
+ .resume = mpc52xx_uart_of_resume,
+#endif
+ .driver = {
+ .name = "mpc52xx-psc-uart",
+ },
+};
+#endif /* defined(CONFIG_PPC_MERGE) */
/* ======================================================================== */
{
int ret;
- printk(KERN_INFO "Serial: MPC52xx PSC driver\n");
+ printk(KERN_INFO "Serial: MPC52xx PSC UART driver\n");
- ret = uart_register_driver(&mpc52xx_uart_driver);
- if (ret == 0) {
- ret = platform_driver_register(&mpc52xx_uart_platform_driver);
- if (ret)
- uart_unregister_driver(&mpc52xx_uart_driver);
+ if ((ret = uart_register_driver(&mpc52xx_uart_driver)) != 0) {
+ printk(KERN_ERR "%s: uart_register_driver failed (%i)\n",
+ __FILE__, ret);
+ return ret;
}
- return ret;
+#if defined(CONFIG_PPC_MERGE)
+ mpc52xx_uart_of_enumerate();
+
+ ret = of_register_platform_driver(&mpc52xx_uart_of_driver);
+ if (ret) {
+ printk(KERN_ERR "%s: of_register_platform_driver failed (%i)\n",
+ __FILE__, ret);
+ uart_unregister_driver(&mpc52xx_uart_driver);
+ return ret;
+ }
+#else
+ ret = platform_driver_register(&mpc52xx_uart_platform_driver);
+ if (ret) {
+ printk(KERN_ERR "%s: platform_driver_register failed (%i)\n",
+ __FILE__, ret);
+ uart_unregister_driver(&mpc52xx_uart_driver);
+ return ret;
+ }
+#endif
+
+ return 0;
}
static void __exit
mpc52xx_uart_exit(void)
{
+#if defined(CONFIG_PPC_MERGE)
+ of_unregister_platform_driver(&mpc52xx_uart_of_driver);
+#else
platform_driver_unregister(&mpc52xx_uart_platform_driver);
+#endif
uart_unregister_driver(&mpc52xx_uart_driver);
}
git://git.onelab.eu / linux-2.6.git / blobdiff