diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/serial/imx.c | 100 |
2 files changed, 81 insertions, 21 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 9bc4276..0843c54 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -753,7 +753,7 @@ config BFIN_UART3_CTSRTS config SERIAL_IMX bool "IMX serial port support" - depends on ARM && ARCH_IMX + depends on ARM && (ARCH_IMX || ARCH_MXC) select SERIAL_CORE help If you have a machine based on a Motorola IMX CPU you diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 9e2162e..549440b 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -62,6 +62,11 @@ #define UBIR 0xa4 /* BRM Incremental Register */ #define UBMR 0xa8 /* BRM Modulator Register */ #define UBRC 0xac /* Baud Rate Count Register */ +#ifdef CONFIG_ARCH_MX3 +#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 */ @@ -71,6 +76,7 @@ #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) @@ -90,7 +96,12 @@ #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 +#ifdef CONFIG_ARCH_MX3 +#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 */ @@ -164,8 +175,19 @@ #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 + +#ifdef CONFIG_ARCH_MX3 +#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 @@ -409,6 +431,26 @@ out: 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. */ @@ -514,21 +556,34 @@ static int imx_startup(struct uart_port *port) 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 @@ -553,9 +608,11 @@ static int imx_startup(struct uart_port *port) 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; } @@ -573,9 +630,12 @@ static void imx_shutdown(struct uart_port *port) /* * 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. @@ -973,7 +1033,7 @@ imx_console_setup(struct console *co, char *options) 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, @@ -990,7 +1050,7 @@ static struct console imx_console = { 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), |