* with the serial core maintainer satisfaction to appear soon.
*/
-#include <linux/config.h>
#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
-
-#include <asm/io.h>
-#include <asm/hardware.h>
-#include <asm/irq.h>
-#include <asm/arch/pxa-regs.h>
-
+#include <linux/clk.h>
+#include <linux/io.h>
struct uart_pxa_port {
struct uart_port port;
unsigned char lcr;
unsigned char mcr;
unsigned int lsr_break_flag;
- unsigned int cken;
+ struct clk *clk;
char *name;
};
serial_out(up, UART_IER, up->ier);
}
-static inline void
-receive_chars(struct uart_pxa_port *up, int *status, struct pt_regs *regs)
+static inline void receive_chars(struct uart_pxa_port *up, int *status)
{
- struct tty_struct *tty = up->port.info->tty;
+ struct tty_struct *tty = up->port.state->port.tty;
unsigned int ch, flag;
int max_count = 256;
flag = TTY_FRAME;
}
- if (uart_handle_sysrq_char(&up->port, ch, regs))
+ if (uart_handle_sysrq_char(&up->port, ch))
goto ignore_char;
uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag);
static void transmit_chars(struct uart_pxa_port *up)
{
- struct circ_buf *xmit = &up->port.info->xmit;
+ struct circ_buf *xmit = &up->port.state->xmit;
int count;
if (up->port.x_char) {
if (status & UART_MSR_DCTS)
uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
- wake_up_interruptible(&up->port.info->delta_msr_wait);
+ 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 pt_regs *regs)
+static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
{
- struct uart_pxa_port *up = (struct uart_pxa_port *)dev_id;
+ struct uart_pxa_port *up = dev_id;
unsigned int iir, lsr;
iir = serial_in(up, UART_IIR);
return IRQ_NONE;
lsr = serial_in(up, UART_LSR);
if (lsr & UART_LSR_DR)
- receive_chars(up, &lsr, regs);
+ receive_chars(up, &lsr);
check_modem_status(up);
if (lsr & UART_LSR_THRE)
transmit_chars(up);
unsigned char status;
unsigned int ret;
-return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
status = serial_in(up, UART_MSR);
ret = 0;
else
up->mcr = 0;
+ up->port.uartclk = clk_get_rate(up->clk);
+
/*
* Allocate the IRQ
*/
/*
* Finally, enable interrupts. Note: Modem status interrupts
- * are set via set_termios(), which will be occuring imminently
+ * 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;
}
static void
-serial_pxa_set_termios(struct uart_port *port, struct termios *termios,
- struct termios *old)
+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:
* Ensure the port will be enabled.
* This is required especially for serial console.
*/
- up->ier |= IER_UUE;
+ up->ier |= UART_IER_UUE;
/*
* Update the per-port timeout.
serial_out(up, UART_IER, up->ier);
- serial_out(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
+ 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 */
+ 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);
unsigned int oldstate)
{
struct uart_pxa_port *up = (struct uart_pxa_port *)port;
- pxa_set_cken(up->cken, !state);
+
if (!state)
- udelay(1);
+ clk_enable(up->clk);
+ else
+ clk_disable(up->clk);
}
static void serial_pxa_release_port(struct uart_port *port)
return up->name;
}
-#ifdef CONFIG_SERIAL_PXA_CONSOLE
-
-static struct uart_pxa_port serial_pxa_ports[];
+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)
/*
}
}
+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...
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];
+ struct uart_pxa_port *up = serial_pxa_ports[co->index];
unsigned int ier;
- int i;
+
+ 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);
- /*
- * Now, do each character
- */
- for (i = 0; i < count; i++, s++) {
- wait_for_xmitr(up);
-
- /*
- * Send the character out.
- * If a LF, also do CR...
- */
- serial_out(up, UART_TX, *s);
- if (*s == 10) {
- wait_for_xmitr(up);
- serial_out(up, UART_TX, 13);
- }
- }
+ uart_console_write(&up->port, s, count, serial_pxa_console_putchar);
/*
* Finally, wait for transmitter to become empty
*/
wait_for_xmitr(up);
serial_out(up, UART_IER, ier);
+
+ clk_disable(up->clk);
}
static int __init
if (co->index == -1 || co->index >= serial_pxa_reg.nr)
co->index = 0;
- up = &serial_pxa_ports[co->index];
+ up = serial_pxa_ports[co->index];
+ if (!up)
+ return -ENODEV;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
.data = &serial_pxa_reg,
};
-static int __init
-serial_pxa_console_init(void)
-{
- register_console(&serial_pxa_console);
- return 0;
-}
-
-console_initcall(serial_pxa_console_init);
-
#define PXA_CONSOLE &serial_pxa_console
#else
#define PXA_CONSOLE NULL
.verify_port = serial_pxa_verify_port,
};
-static struct uart_pxa_port serial_pxa_ports[] = {
- { /* FFUART */
- .name = "FFUART",
- .cken = CKEN6_FFUART,
- .port = {
- .type = PORT_PXA,
- .iotype = UPIO_MEM,
- .membase = (void *)&FFUART,
- .mapbase = __PREG(FFUART),
- .irq = IRQ_FFUART,
- .uartclk = 921600 * 16,
- .fifosize = 64,
- .ops = &serial_pxa_pops,
- .line = 0,
- },
- }, { /* BTUART */
- .name = "BTUART",
- .cken = CKEN7_BTUART,
- .port = {
- .type = PORT_PXA,
- .iotype = UPIO_MEM,
- .membase = (void *)&BTUART,
- .mapbase = __PREG(BTUART),
- .irq = IRQ_BTUART,
- .uartclk = 921600 * 16,
- .fifosize = 64,
- .ops = &serial_pxa_pops,
- .line = 1,
- },
- }, { /* STUART */
- .name = "STUART",
- .cken = CKEN5_STUART,
- .port = {
- .type = PORT_PXA,
- .iotype = UPIO_MEM,
- .membase = (void *)&STUART,
- .mapbase = __PREG(STUART),
- .irq = IRQ_STUART,
- .uartclk = 921600 * 16,
- .fifosize = 64,
- .ops = &serial_pxa_pops,
- .line = 2,
- },
- }, { /* HWUART */
- .name = "HWUART",
- .cken = CKEN4_HWUART,
- .port = {
- .type = PORT_PXA,
- .iotype = UPIO_MEM,
- .membase = (void *)&HWUART,
- .mapbase = __PREG(HWUART),
- .irq = IRQ_HWUART,
- .uartclk = 921600 * 16,
- .fifosize = 64,
- .ops = &serial_pxa_pops,
- .line = 3,
- },
- }
-};
-
static struct uart_driver serial_pxa_reg = {
.owner = THIS_MODULE,
.driver_name = "PXA serial",
- .devfs_name = "tts/",
.dev_name = "ttyS",
.major = TTY_MAJOR,
.minor = 64,
- .nr = ARRAY_SIZE(serial_pxa_ports),
+ .nr = 4,
.cons = PXA_CONSOLE,
};
-static int serial_pxa_suspend(struct platform_device *dev, pm_message_t state)
+#ifdef CONFIG_PM
+static int serial_pxa_suspend(struct device *dev)
{
- struct uart_pxa_port *sport = platform_get_drvdata(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 platform_device *dev)
+static int serial_pxa_resume(struct device *dev)
{
- struct uart_pxa_port *sport = platform_get_drvdata(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)
{
- serial_pxa_ports[dev->id].port.dev = &dev->dev;
- uart_add_one_port(&serial_pxa_reg, &serial_pxa_ports[dev->id].port);
- platform_set_drvdata(dev, &serial_pxa_ports[dev->id]);
+ 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)
platform_set_drvdata(dev, NULL);
- if (sport)
- uart_remove_one_port(&serial_pxa_reg, &sport->port);
+ uart_remove_one_port(&serial_pxa_reg, &sport->port);
+ clk_put(sport->clk);
+ kfree(sport);
return 0;
}
.probe = serial_pxa_probe,
.remove = serial_pxa_remove,
- .suspend = serial_pxa_suspend,
- .resume = serial_pxa_resume,
.driver = {
.name = "pxa2xx-uart",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &serial_pxa_pm_ops,
+#endif
},
};
module_exit(serial_pxa_exit);
MODULE_LICENSE("GPL");
-
+MODULE_ALIAS("platform:pxa2xx-uart");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff