openwrt/target/linux/adm5120/patches/200-amba_pl010_hacks.patch

--- a/drivers/serial/amba-pl010.c
+++ b/drivers/serial/amba-pl010.c
@@ -52,11 +52,10 @@
 
 #include <asm/io.h>
 
-#define UART_NR		8
-
 #define SERIAL_AMBA_MAJOR	204
 #define SERIAL_AMBA_MINOR	16
-#define SERIAL_AMBA_NR		UART_NR
+#define SERIAL_AMBA_NR		CONFIG_SERIAL_AMBA_PL010_NUMPORTS
+#define SERIAL_AMBA_NAME	CONFIG_SERIAL_AMBA_PL010_PORTNAME
 
 #define AMBA_ISR_PASS_LIMIT	256
 
@@ -82,7 +81,7 @@
 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
 	unsigned int cr;
 
-	cr = readb(uap->port.membase + UART010_CR);
+	cr = readl(uap->port.membase + UART010_CR);
 	cr &= ~UART010_CR_TIE;
 	writel(cr, uap->port.membase + UART010_CR);
 }
@@ -92,7 +91,7 @@
 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
 	unsigned int cr;
 
-	cr = readb(uap->port.membase + UART010_CR);
+	cr = readl(uap->port.membase + UART010_CR);
 	cr |= UART010_CR_TIE;
 	writel(cr, uap->port.membase + UART010_CR);
 }
@@ -102,7 +101,7 @@
 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
 	unsigned int cr;
 
-	cr = readb(uap->port.membase + UART010_CR);
+	cr = readl(uap->port.membase + UART010_CR);
 	cr &= ~(UART010_CR_RIE | UART010_CR_RTIE);
 	writel(cr, uap->port.membase + UART010_CR);
 }
@@ -112,7 +111,7 @@
 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
 	unsigned int cr;
 
-	cr = readb(uap->port.membase + UART010_CR);
+	cr = readl(uap->port.membase + UART010_CR);
 	cr |= UART010_CR_MSIE;
 	writel(cr, uap->port.membase + UART010_CR);
 }
@@ -122,9 +121,9 @@
 	struct tty_struct *tty = uap->port.info->tty;
 	unsigned int status, ch, flag, rsr, max_count = 256;
 
-	status = readb(uap->port.membase + UART01x_FR);
+	status = readl(uap->port.membase + UART01x_FR);
 	while (UART_RX_DATA(status) && max_count--) {
-		ch = readb(uap->port.membase + UART01x_DR);
+		ch = readl(uap->port.membase + UART01x_DR);
 		flag = TTY_NORMAL;
 
 		uap->port.icount.rx++;
@@ -133,7 +132,7 @@
 		 * Note that the error handling code is
 		 * out of the main execution path
 		 */
-		rsr = readb(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
+		rsr = readl(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
 		if (unlikely(rsr & UART01x_RSR_ANY)) {
 			writel(0, uap->port.membase + UART01x_ECR);
 
@@ -165,7 +164,7 @@
 		uart_insert_char(&uap->port, rsr, UART01x_RSR_OE, ch, flag);
 
 	ignore_char:
-		status = readb(uap->port.membase + UART01x_FR);
+		status = readl(uap->port.membase + UART01x_FR);
 	}
 	spin_unlock(&uap->port.lock);
 	tty_flip_buffer_push(tty);
@@ -210,7 +209,7 @@
 
 	writel(0, uap->port.membase + UART010_ICR);
 
-	status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+	status = readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
 
 	delta = status ^ uap->old_status;
 	uap->old_status = status;
@@ -238,7 +237,7 @@
 
 	spin_lock(&uap->port.lock);
 
-	status = readb(uap->port.membase + UART010_IIR);
+	status = readl(uap->port.membase + UART010_IIR);
 	if (status) {
 		do {
 			if (status & (UART010_IIR_RTIS | UART010_IIR_RIS))
@@ -251,7 +250,7 @@
 			if (pass_counter-- == 0)
 				break;
 
-			status = readb(uap->port.membase + UART010_IIR);
+			status = readl(uap->port.membase + UART010_IIR);
 		} while (status & (UART010_IIR_RTIS | UART010_IIR_RIS |
 				   UART010_IIR_TIS));
 		handled = 1;
@@ -265,7 +264,7 @@
 static unsigned int pl010_tx_empty(struct uart_port *port)
 {
 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
-	unsigned int status = readb(uap->port.membase + UART01x_FR);
+	unsigned int status = readl(uap->port.membase + UART01x_FR);
 	return status & UART01x_FR_BUSY ? 0 : TIOCSER_TEMT;
 }
 
@@ -275,7 +274,7 @@
 	unsigned int result = 0;
 	unsigned int status;
 
-	status = readb(uap->port.membase + UART01x_FR);
+	status = readl(uap->port.membase + UART01x_FR);
 	if (status & UART01x_FR_DCD)
 		result |= TIOCM_CAR;
 	if (status & UART01x_FR_DSR)
@@ -301,7 +300,7 @@
 	unsigned int lcr_h;
 
 	spin_lock_irqsave(&uap->port.lock, flags);
-	lcr_h = readb(uap->port.membase + UART010_LCRH);
+	lcr_h = readl(uap->port.membase + UART010_LCRH);
 	if (break_state == -1)
 		lcr_h |= UART01x_LCRH_BRK;
 	else
@@ -334,7 +333,7 @@
 	/*
 	 * initialise the old status of the modem signals
 	 */
-	uap->old_status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+	uap->old_status = readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
 
 	/*
 	 * Finally, enable interrupts
@@ -365,7 +364,7 @@
 	writel(0, uap->port.membase + UART010_CR);
 
 	/* disable break condition and fifos */
-	writel(readb(uap->port.membase + UART010_LCRH) &
+	writel(readl(uap->port.membase + UART010_LCRH) &
 		~(UART01x_LCRH_BRK | UART01x_LCRH_FEN),
 	       uap->port.membase + UART010_LCRH);
 
@@ -387,7 +386,7 @@
 	/*
 	 * Ask the core to calculate the divisor for us.
 	 */
-	baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16); 
+	baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16);
 	quot = uart_get_divisor(port, baud);
 
 	switch (termios->c_cflag & CSIZE) {
@@ -450,7 +449,7 @@
 		uap->port.ignore_status_mask |= UART_DUMMY_RSR_RX;
 
 	/* first, disable everything */
-	old_cr = readb(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE;
+	old_cr = readl(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE;
 
 	if (UART_ENABLE_MS(port, termios->c_cflag))
 		old_cr |= UART010_CR_MSIE;
@@ -540,7 +539,7 @@
 	.verify_port	= pl010_verify_port,
 };
 
-static struct uart_amba_port *amba_ports[UART_NR];
+static struct uart_amba_port *amba_ports[SERIAL_AMBA_NR];
 
 #ifdef CONFIG_SERIAL_AMBA_PL010_CONSOLE
 
@@ -550,7 +549,7 @@
 	unsigned int status;
 
 	do {
-		status = readb(uap->port.membase + UART01x_FR);
+		status = readl(uap->port.membase + UART01x_FR);
 		barrier();
 	} while (!UART_TX_READY(status));
 	writel(ch, uap->port.membase + UART01x_DR);
@@ -567,7 +566,7 @@
 	/*
 	 *	First save the CR then disable the interrupts
 	 */
-	old_cr = readb(uap->port.membase + UART010_CR);
+	old_cr = readl(uap->port.membase + UART010_CR);
 	writel(UART01x_CR_UARTEN, uap->port.membase + UART010_CR);
 
 	uart_console_write(&uap->port, s, count, pl010_console_putchar);
@@ -577,7 +576,7 @@
 	 *	and restore the TCR
 	 */
 	do {
-		status = readb(uap->port.membase + UART01x_FR);
+		status = readl(uap->port.membase + UART01x_FR);
 		barrier();
 	} while (status & UART01x_FR_BUSY);
 	writel(old_cr, uap->port.membase + UART010_CR);
@@ -589,9 +588,9 @@
 pl010_console_get_options(struct uart_amba_port *uap, int *baud,
 			     int *parity, int *bits)
 {
-	if (readb(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) {
+	if (readl(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) {
 		unsigned int lcr_h, quot;
-		lcr_h = readb(uap->port.membase + UART010_LCRH);
+		lcr_h = readl(uap->port.membase + UART010_LCRH);
 
 		*parity = 'n';
 		if (lcr_h & UART01x_LCRH_PEN) {
@@ -606,8 +605,8 @@
 		else
 			*bits = 8;
 
-		quot = readb(uap->port.membase + UART010_LCRL) |
-		       readb(uap->port.membase + UART010_LCRM) << 8;
+		quot = readl(uap->port.membase + UART010_LCRL) |
+		       readl(uap->port.membase + UART010_LCRM) << 8;
 		*baud = uap->port.uartclk / (16 * (quot + 1));
 	}
 }
@@ -625,7 +624,7 @@
 	 * if so, search for the first available port that does have
 	 * console support.
 	 */
-	if (co->index >= UART_NR)
+	if (co->index >= SERIAL_AMBA_NR)
 		co->index = 0;
 	uap = amba_ports[co->index];
 	if (!uap)
@@ -643,7 +642,7 @@
 
 static struct uart_driver amba_reg;
 static struct console amba_console = {
-	.name		= "ttyAM",
+	.name		= SERIAL_AMBA_NAME,
 	.write		= pl010_console_write,
 	.device		= uart_console_device,
 	.setup		= pl010_console_setup,
@@ -659,11 +658,11 @@
 
 static struct uart_driver amba_reg = {
 	.owner			= THIS_MODULE,
-	.driver_name		= "ttyAM",
-	.dev_name		= "ttyAM",
+	.driver_name		= SERIAL_AMBA_NAME,
+	.dev_name		= SERIAL_AMBA_NAME,
 	.major			= SERIAL_AMBA_MAJOR,
 	.minor			= SERIAL_AMBA_MINOR,
-	.nr			= UART_NR,
+	.nr			= SERIAL_AMBA_NR,
 	.cons			= AMBA_CONSOLE,
 };
 
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -287,10 +287,25 @@
 	help
 	  This selects the ARM(R) AMBA(R) PrimeCell PL010 UART.  If you have
 	  an Integrator/AP or Integrator/PP2 platform, or if you have a
-	  Cirrus Logic EP93xx CPU, say Y or M here.
+	  Cirrus Logic EP93xx CPU or an Infineon ADM5120 SOC, say Y or M here.
 
 	  If unsure, say N.
 
+config SERIAL_AMBA_PL010_NUMPORTS
+	int "Maximum number of AMBA PL010 serial ports"
+	depends on SERIAL_AMBA_PL010
+	default "8"
+	---help---
+	  Set this to the number of serial ports you want the AMBA PL010 driver
+	  to support.
+
+config SERIAL_AMBA_PL010_PORTNAME
+	string "Name of the AMBA PL010 serial ports"
+	depends on SERIAL_AMBA_PL010
+	default "ttyAM"
+	---help---
+	  ::: To be written :::
+
 config SERIAL_AMBA_PL010_CONSOLE
 	bool "Support for console on AMBA serial port"
 	depends on SERIAL_AMBA_PL010=y