#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
+#include <linux/clk.h>
#include <asm/io.h>
#include <asm/irq.h>
#define UBIR 0xa4 /* BRM Incremental Register */
#define UBMR 0xa8 /* BRM Modulator Register */
#define UBRC 0xac /* Baud Rate Count Register */
+#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2
+#define ONEMS 0xb0 /* One Millisecond register */
+#define UTS 0xb4 /* UART Test Register */
+#endif
+#ifdef CONFIG_ARCH_IMX
#define BIPR1 0xb0 /* Incremental Preset Register 1 */
#define BIPR2 0xb4 /* Incremental Preset Register 2 */
#define BIPR3 0xb8 /* Incremental Preset Register 3 */
#define BMPR3 0xc8 /* BRM Modulator Register 3 */
#define BMPR4 0xcc /* BRM Modulator Register 4 */
#define UTS 0xd0 /* UART Test Register */
+#endif
/* UART Control Register Bit Fields.*/
#define URXD_CHARRDY (1<<15)
#define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */
#define UCR1_SNDBRK (1<<4) /* Send break */
#define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */
+#ifdef CONFIG_ARCH_IMX
#define UCR1_UARTCLKEN (1<<2) /* UART clock enabled */
+#endif
+#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2
+#define UCR1_UARTCLKEN (0) /* not present on mx2/mx3 */
+#endif
#define UCR1_DOZE (1<<1) /* Doze */
#define UCR1_UARTEN (1<<0) /* UART enabled */
#define UCR2_ESCI (1<<15) /* Escape seq interrupt enable */
#define UTS_SOFTRST (1<<0) /* Software reset */
/* We've been assigned a range on the "Low-density serial ports" major */
+#ifdef CONFIG_ARCH_IMX
#define SERIAL_IMX_MAJOR 204
#define MINOR_START 41
+#define DEV_NAME "ttySMX"
+#define MAX_INTERNAL_IRQ IMX_IRQS
+#endif
+
+#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2
+#define SERIAL_IMX_MAJOR 207
+#define MINOR_START 16
+#define DEV_NAME "ttymxc"
+#define MAX_INTERNAL_IRQ MXC_MAX_INT_LINES
+#endif
/*
* This determines how often we check the modem status signals
#define DRIVER_NAME "IMX-uart"
+#define UART_NR 8
+
struct imx_port {
struct uart_port port;
struct timer_list timer;
unsigned int old_status;
int txirq,rxirq,rtsirq;
int have_rtscts:1;
+ struct clk *clk;
};
/*
{
struct imx_port *sport = dev_id;
unsigned int rx,flg,ignored = 0;
- struct tty_struct *tty = sport->port.info->tty;
+ struct tty_struct *tty = sport->port.info->port.tty;
unsigned long flags, temp;
spin_lock_irqsave(&sport->port.lock,flags);
return IRQ_HANDLED;
}
+static irqreturn_t imx_int(int irq, void *dev_id)
+{
+ struct imx_port *sport = dev_id;
+ unsigned int sts;
+
+ sts = readl(sport->port.membase + USR1);
+
+ if (sts & USR1_RRDY)
+ imx_rxint(irq, dev_id);
+
+ if (sts & USR1_TRDY &&
+ readl(sport->port.membase + UCR1) & UCR1_TXMPTYEN)
+ imx_txint(irq, dev_id);
+
+ if (sts & USR1_RTSS)
+ imx_rtsint(irq, dev_id);
+
+ return IRQ_HANDLED;
+}
+
/*
* Return TIOCSER_TEMT when transmitter is not busy.
*/
* RFDIV is set such way to satisfy requested uartclk value
*/
val = TXTL << 10 | RXTL;
- ufcr_rfdiv = (imx_get_perclk1() + sport->port.uartclk / 2) / sport->port.uartclk;
+ ufcr_rfdiv = (clk_get_rate(sport->clk) + sport->port.uartclk / 2)
+ / sport->port.uartclk;
if(!ufcr_rfdiv)
ufcr_rfdiv = 1;
writel(temp & ~UCR4_DREN, sport->port.membase + UCR4);
/*
- * Allocate the IRQ
+ * Allocate the IRQ(s) i.MX1 has three interrupts whereas later
+ * chips only have one interrupt.
*/
- retval = request_irq(sport->rxirq, imx_rxint, 0,
- DRIVER_NAME, sport);
- if (retval) goto error_out1;
-
- retval = request_irq(sport->txirq, imx_txint, 0,
- DRIVER_NAME, sport);
- if (retval) goto error_out2;
-
- retval = request_irq(sport->rtsirq, imx_rtsint,
- (sport->rtsirq < IMX_IRQS) ? 0 :
+ if (sport->txirq > 0) {
+ retval = request_irq(sport->rxirq, imx_rxint, 0,
+ DRIVER_NAME, sport);
+ if (retval)
+ goto error_out1;
+
+ retval = request_irq(sport->txirq, imx_txint, 0,
+ DRIVER_NAME, sport);
+ if (retval)
+ goto error_out2;
+
+ retval = request_irq(sport->rtsirq, imx_rtsint,
+ (sport->rtsirq < MAX_INTERNAL_IRQ) ? 0 :
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
- DRIVER_NAME, sport);
- if (retval) goto error_out3;
+ DRIVER_NAME, sport);
+ if (retval)
+ goto error_out3;
+ } else {
+ retval = request_irq(sport->port.irq, imx_int, 0,
+ DRIVER_NAME, sport);
+ if (retval) {
+ free_irq(sport->port.irq, sport);
+ goto error_out1;
+ }
+ }
/*
* Finally, clear and enable interrupts
return 0;
error_out3:
- free_irq(sport->txirq, sport);
+ if (sport->txirq)
+ free_irq(sport->txirq, sport);
error_out2:
- free_irq(sport->rxirq, sport);
+ if (sport->rxirq)
+ free_irq(sport->rxirq, sport);
error_out1:
return retval;
}
/*
* Free the interrupts
*/
- free_irq(sport->rtsirq, sport);
- free_irq(sport->txirq, sport);
- free_irq(sport->rxirq, sport);
+ if (sport->txirq > 0) {
+ free_irq(sport->rtsirq, sport);
+ free_irq(sport->txirq, sport);
+ free_irq(sport->rxirq, sport);
+ } else
+ free_irq(sport->port.irq, sport);
/*
* Disable all interrupts, port and break condition.
.verify_port = imx_verify_port,
};
-static struct imx_port imx_ports[] = {
- {
- .txirq = UART1_MINT_TX,
- .rxirq = UART1_MINT_RX,
- .rtsirq = UART1_MINT_RTS,
- .port = {
- .type = PORT_IMX,
- .iotype = UPIO_MEM,
- .membase = (void *)IMX_UART1_BASE,
- .mapbase = 0x00206000,
- .irq = UART1_MINT_RX,
- .fifosize = 32,
- .flags = UPF_BOOT_AUTOCONF,
- .ops = &imx_pops,
- .line = 0,
- },
- }, {
- .txirq = UART2_MINT_TX,
- .rxirq = UART2_MINT_RX,
- .rtsirq = UART2_MINT_RTS,
- .port = {
- .type = PORT_IMX,
- .iotype = UPIO_MEM,
- .membase = (void *)IMX_UART2_BASE,
- .mapbase = 0x00207000,
- .irq = UART2_MINT_RX,
- .fifosize = 32,
- .flags = UPF_BOOT_AUTOCONF,
- .ops = &imx_pops,
- .line = 1,
- },
- }
-};
-
-/*
- * Setup the IMX serial ports.
- * Note also that we support "console=ttySMXx" where "x" is either 0 or 1.
- * Which serial port this ends up being depends on the machine you're
- * running this kernel on. I'm not convinced that this is a good idea,
- * but that's the way it traditionally works.
- *
- */
-static void __init imx_init_ports(void)
-{
- static int first = 1;
- int i;
-
- if (!first)
- return;
- first = 0;
-
- for (i = 0; i < ARRAY_SIZE(imx_ports); i++) {
- init_timer(&imx_ports[i].timer);
- imx_ports[i].timer.function = imx_timeout;
- imx_ports[i].timer.data = (unsigned long)&imx_ports[i];
-
- imx_ports[i].port.uartclk = imx_get_perclk1();
- }
-}
+static struct imx_port *imx_ports[UART_NR];
#ifdef CONFIG_SERIAL_IMX_CONSOLE
static void imx_console_putchar(struct uart_port *port, int ch)
static void
imx_console_write(struct console *co, const char *s, unsigned int count)
{
- struct imx_port *sport = &imx_ports[co->index];
+ struct imx_port *sport = imx_ports[co->index];
unsigned int old_ucr1, old_ucr2;
/*
else
ucfr_rfdiv = 6 - ucfr_rfdiv;
- uartclk = imx_get_perclk1();
+ uartclk = clk_get_rate(sport->clk);
uartclk /= ucfr_rfdiv;
{ /*
*/
if (co->index == -1 || co->index >= ARRAY_SIZE(imx_ports))
co->index = 0;
- sport = &imx_ports[co->index];
+ sport = imx_ports[co->index];
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
static struct uart_driver imx_reg;
static struct console imx_console = {
- .name = "ttySMX",
+ .name = DEV_NAME,
.write = imx_console_write,
.device = uart_console_device,
.setup = imx_console_setup,
.data = &imx_reg,
};
-static int __init imx_rs_console_init(void)
-{
- imx_init_ports();
- register_console(&imx_console);
- return 0;
-}
-console_initcall(imx_rs_console_init);
-
#define IMX_CONSOLE &imx_console
#else
#define IMX_CONSOLE NULL
static struct uart_driver imx_reg = {
.owner = THIS_MODULE,
.driver_name = DRIVER_NAME,
- .dev_name = "ttySMX",
+ .dev_name = DEV_NAME,
.major = SERIAL_IMX_MAJOR,
.minor = MINOR_START,
.nr = ARRAY_SIZE(imx_ports),
return 0;
}
-static int serial_imx_probe(struct platform_device *dev)
+static int serial_imx_probe(struct platform_device *pdev)
{
+ struct imx_port *sport;
struct imxuart_platform_data *pdata;
+ void __iomem *base;
+ int ret = 0;
+ struct resource *res;
- imx_ports[dev->id].port.dev = &dev->dev;
+ sport = kzalloc(sizeof(*sport), GFP_KERNEL);
+ if (!sport)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -ENODEV;
+ goto free;
+ }
+
+ base = ioremap(res->start, PAGE_SIZE);
+ if (!base) {
+ ret = -ENOMEM;
+ goto free;
+ }
- pdata = (struct imxuart_platform_data *)dev->dev.platform_data;
+ sport->port.dev = &pdev->dev;
+ sport->port.mapbase = res->start;
+ sport->port.membase = base;
+ sport->port.type = PORT_IMX,
+ sport->port.iotype = UPIO_MEM;
+ sport->port.irq = platform_get_irq(pdev, 0);
+ sport->rxirq = platform_get_irq(pdev, 0);
+ sport->txirq = platform_get_irq(pdev, 1);
+ sport->rtsirq = platform_get_irq(pdev, 2);
+ sport->port.fifosize = 32;
+ sport->port.ops = &imx_pops;
+ sport->port.flags = UPF_BOOT_AUTOCONF;
+ sport->port.line = pdev->id;
+ init_timer(&sport->timer);
+ sport->timer.function = imx_timeout;
+ sport->timer.data = (unsigned long)sport;
+
+ sport->clk = clk_get(&pdev->dev, "uart_clk");
+ if (IS_ERR(sport->clk)) {
+ ret = PTR_ERR(sport->clk);
+ goto unmap;
+ }
+ clk_enable(sport->clk);
+
+ sport->port.uartclk = clk_get_rate(sport->clk);
+
+ imx_ports[pdev->id] = sport;
+
+ pdata = pdev->dev.platform_data;
if(pdata && (pdata->flags & IMXUART_HAVE_RTSCTS))
- imx_ports[dev->id].have_rtscts = 1;
+ sport->have_rtscts = 1;
+
+ if (pdata->init)
+ pdata->init(pdev);
+
+ uart_add_one_port(&imx_reg, &sport->port);
+ platform_set_drvdata(pdev, &sport->port);
- uart_add_one_port(&imx_reg, &imx_ports[dev->id].port);
- platform_set_drvdata(dev, &imx_ports[dev->id]);
return 0;
+unmap:
+ iounmap(sport->port.membase);
+free:
+ kfree(sport);
+
+ return ret;
}
-static int serial_imx_remove(struct platform_device *dev)
+static int serial_imx_remove(struct platform_device *pdev)
{
- struct imx_port *sport = platform_get_drvdata(dev);
+ struct imxuart_platform_data *pdata;
+ struct imx_port *sport = platform_get_drvdata(pdev);
+
+ pdata = pdev->dev.platform_data;
- platform_set_drvdata(dev, NULL);
+ platform_set_drvdata(pdev, NULL);
- if (sport)
+ if (sport) {
uart_remove_one_port(&imx_reg, &sport->port);
+ clk_put(sport->clk);
+ }
+
+ clk_disable(sport->clk);
+
+ if (pdata->exit)
+ pdata->exit(pdev);
+
+ iounmap(sport->port.membase);
+ kfree(sport);
return 0;
}
printk(KERN_INFO "Serial: IMX driver\n");
- imx_init_ports();
-
ret = uart_register_driver(&imx_reg);
if (ret)
return ret;