[adm8668] get rid of the specific UART driver and use AMBA PL010

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34548 3c298f89-4303-0410-b956-a3cf2f4a3e73

4 files changed, 400 insertions, 43 deletions

diff --git a/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch b/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch
index 53a627ecc..541b0bff5 100644
--- a/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch
+++ b/target/linux/adm8668/patches-3.3/001-adm8668_arch.patch
@@ -10,7 +10,7 @@
  include $(patsubst %, $(srctree)/arch/mips/%/Platform, $(platforms))
 --- a/arch/mips/Kconfig
 +++ b/arch/mips/Kconfig
-@@ -105,6 +105,27 @@ config BCM47XX
+@@ -105,6 +105,25 @@ config BCM47XX
  	help
  	 Support for BCM47XX based boards
  
@@ -28,8 +28,6 @@
 +	select SYS_SUPPORTS_32BIT_KERNEL
 +	select DMA_NONCOHERENT
 +	select SWAP_IO_SPACE
-+	select SERIAL_ADM8668
-+	select SERIAL_ADM8668_CONSOLE
 +	select SYS_HAS_EARLY_PRINTK
 +	help
 +		ADM8668 board support by neutronscott
@@ -38,3 +36,11 @@
  config BCM63XX
  	bool "Broadcom BCM63XX based boards"
  	select CEVT_R4K
+@@ -813,6 +833,7 @@ config NLM_XLP_BOARD
+ 
+ endchoice
+ 
++source "arch/mips/adm8668/Kconfig"
+ source "arch/mips/alchemy/Kconfig"
+ source "arch/mips/ath79/Kconfig"
+ source "arch/mips/bcm47xx/Kconfig"
diff --git a/target/linux/adm8668/patches-3.3/002-adm8668_uart.patch b/target/linux/adm8668/patches-3.3/002-adm8668_uart.patch
deleted file mode 100644
index ed55cbbaa..000000000
--- a/target/linux/adm8668/patches-3.3/002-adm8668_uart.patch
+++ /dev/null
@@ -1,40 +0,0 @@
---- a/drivers/tty/serial/Kconfig
-+++ b/drivers/tty/serial/Kconfig
-@@ -1192,6 +1192,25 @@ config SERIAL_BCM63XX_CONSOLE
- 	  If you have enabled the serial port on the bcm63xx CPU
- 	  you can make it the console by answering Y to this option.
- 
-+config SERIAL_ADM8668
-+	tristate "ADM8668 serial port support"
-+	select SERIAL_CORE
-+	depends on ADM8668
-+	help
-+	  If you have an adm8668 CPU, you can enable its onboard
-+	  serial port by enabling this options.
-+
-+          To compile this driver as a module, choose M here: the
-+          module will be called adm8668_uart.
-+
-+config SERIAL_ADM8668_CONSOLE
-+	bool "Console on adm8668 serial port"
-+	depends on SERIAL_ADM8668=y
-+	select SERIAL_CORE_CONSOLE
-+	help
-+	  If you have enabled the serial port on the adm8668 CPU
-+	  you can make it the console by answering Y to this option.
-+
- config SERIAL_GRLIB_GAISLER_APBUART
- 	tristate "GRLIB APBUART serial support"
- 	depends on OF && SPARC
---- a/include/linux/serial_core.h
-+++ b/include/linux/serial_core.h
-@@ -211,6 +211,9 @@
- #define PORT_AR933X	99
- 
- 
-+/* ADM8668 UART */
-+#define	PORT_ADM8668	100
-+
- #ifdef __KERNEL__
- 
- #include <linux/compiler.h>
diff --git a/target/linux/adm8668/patches-3.3/200-amba_pl010_hacks.patch b/target/linux/adm8668/patches-3.3/200-amba_pl010_hacks.patch
new file mode 100644
index 000000000..3c4ea35a1
--- /dev/null
+++ b/target/linux/adm8668/patches-3.3/200-amba_pl010_hacks.patch
@@ -0,0 +1,378 @@
+--- a/drivers/tty/serial/amba-pl010.c
++++ b/drivers/tty/serial/amba-pl010.c
+@@ -49,11 +49,10 @@
+ 
+ #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
+ 
+@@ -79,9 +78,9 @@ static void pl010_stop_tx(struct uart_po
+ 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
+ 	unsigned int cr;
+ 
+-	cr = readb(uap->port.membase + UART010_CR);
++	cr = __raw_readl(uap->port.membase + UART010_CR);
+ 	cr &= ~UART010_CR_TIE;
+-	writel(cr, uap->port.membase + UART010_CR);
++	__raw_writel(cr, uap->port.membase + UART010_CR);
+ }
+ 
+ static void pl010_start_tx(struct uart_port *port)
+@@ -89,9 +88,9 @@ static void pl010_start_tx(struct uart_p
+ 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
+ 	unsigned int cr;
+ 
+-	cr = readb(uap->port.membase + UART010_CR);
++	cr = __raw_readl(uap->port.membase + UART010_CR);
+ 	cr |= UART010_CR_TIE;
+-	writel(cr, uap->port.membase + UART010_CR);
++	__raw_writel(cr, uap->port.membase + UART010_CR);
+ }
+ 
+ static void pl010_stop_rx(struct uart_port *port)
+@@ -99,9 +98,9 @@ static void pl010_stop_rx(struct uart_po
+ 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
+ 	unsigned int cr;
+ 
+-	cr = readb(uap->port.membase + UART010_CR);
++	cr = __raw_readl(uap->port.membase + UART010_CR);
+ 	cr &= ~(UART010_CR_RIE | UART010_CR_RTIE);
+-	writel(cr, uap->port.membase + UART010_CR);
++	__raw_writel(cr, uap->port.membase + UART010_CR);
+ }
+ 
+ static void pl010_enable_ms(struct uart_port *port)
+@@ -109,9 +108,9 @@ static void pl010_enable_ms(struct uart_
+ 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
+ 	unsigned int cr;
+ 
+-	cr = readb(uap->port.membase + UART010_CR);
++	cr = __raw_readl(uap->port.membase + UART010_CR);
+ 	cr |= UART010_CR_MSIE;
+-	writel(cr, uap->port.membase + UART010_CR);
++	__raw_writel(cr, uap->port.membase + UART010_CR);
+ }
+ 
+ static void pl010_rx_chars(struct uart_amba_port *uap)
+@@ -119,9 +118,9 @@ static void pl010_rx_chars(struct uart_a
+ 	struct tty_struct *tty = uap->port.state->port.tty;
+ 	unsigned int status, ch, flag, rsr, max_count = 256;
+ 
+-	status = readb(uap->port.membase + UART01x_FR);
++	status = __raw_readl(uap->port.membase + UART01x_FR);
+ 	while (UART_RX_DATA(status) && max_count--) {
+-		ch = readb(uap->port.membase + UART01x_DR);
++		ch = __raw_readl(uap->port.membase + UART01x_DR);
+ 		flag = TTY_NORMAL;
+ 
+ 		uap->port.icount.rx++;
+@@ -130,9 +129,9 @@ static void pl010_rx_chars(struct uart_a
+ 		 * 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 = __raw_readl(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX;
+ 		if (unlikely(rsr & UART01x_RSR_ANY)) {
+-			writel(0, uap->port.membase + UART01x_ECR);
++			__raw_writel(0, uap->port.membase + UART01x_ECR);
+ 
+ 			if (rsr & UART01x_RSR_BE) {
+ 				rsr &= ~(UART01x_RSR_FE | UART01x_RSR_PE);
+@@ -162,7 +161,7 @@ static void pl010_rx_chars(struct uart_a
+ 		uart_insert_char(&uap->port, rsr, UART01x_RSR_OE, ch, flag);
+ 
+ 	ignore_char:
+-		status = readb(uap->port.membase + UART01x_FR);
++		status = __raw_readl(uap->port.membase + UART01x_FR);
+ 	}
+ 	spin_unlock(&uap->port.lock);
+ 	tty_flip_buffer_push(tty);
+@@ -175,7 +174,7 @@ static void pl010_tx_chars(struct uart_a
+ 	int count;
+ 
+ 	if (uap->port.x_char) {
+-		writel(uap->port.x_char, uap->port.membase + UART01x_DR);
++		__raw_writel(uap->port.x_char, uap->port.membase + UART01x_DR);
+ 		uap->port.icount.tx++;
+ 		uap->port.x_char = 0;
+ 		return;
+@@ -187,7 +186,7 @@ static void pl010_tx_chars(struct uart_a
+ 
+ 	count = uap->port.fifosize >> 1;
+ 	do {
+-		writel(xmit->buf[xmit->tail], uap->port.membase + UART01x_DR);
++		__raw_writel(xmit->buf[xmit->tail], uap->port.membase + UART01x_DR);
+ 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ 		uap->port.icount.tx++;
+ 		if (uart_circ_empty(xmit))
+@@ -205,9 +204,9 @@ static void pl010_modem_status(struct ua
+ {
+ 	unsigned int status, delta;
+ 
+-	writel(0, uap->port.membase + UART010_ICR);
++	__raw_writel(0, uap->port.membase + UART010_ICR);
+ 
+-	status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
++	status = __raw_readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+ 
+ 	delta = status ^ uap->old_status;
+ 	uap->old_status = status;
+@@ -235,7 +234,7 @@ static irqreturn_t pl010_int(int irq, vo
+ 
+ 	spin_lock(&uap->port.lock);
+ 
+-	status = readb(uap->port.membase + UART010_IIR);
++	status = __raw_readl(uap->port.membase + UART010_IIR);
+ 	if (status) {
+ 		do {
+ 			if (status & (UART010_IIR_RTIS | UART010_IIR_RIS))
+@@ -248,7 +247,7 @@ static irqreturn_t pl010_int(int irq, vo
+ 			if (pass_counter-- == 0)
+ 				break;
+ 
+-			status = readb(uap->port.membase + UART010_IIR);
++			status = __raw_readl(uap->port.membase + UART010_IIR);
+ 		} while (status & (UART010_IIR_RTIS | UART010_IIR_RIS |
+ 				   UART010_IIR_TIS));
+ 		handled = 1;
+@@ -262,7 +261,7 @@ static irqreturn_t pl010_int(int irq, vo
+ 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 = __raw_readl(uap->port.membase + UART01x_FR);
+ 	return status & UART01x_FR_BUSY ? 0 : TIOCSER_TEMT;
+ }
+ 
+@@ -272,7 +271,7 @@ static unsigned int pl010_get_mctrl(stru
+ 	unsigned int result = 0;
+ 	unsigned int status;
+ 
+-	status = readb(uap->port.membase + UART01x_FR);
++	status = __raw_readl(uap->port.membase + UART01x_FR);
+ 	if (status & UART01x_FR_DCD)
+ 		result |= TIOCM_CAR;
+ 	if (status & UART01x_FR_DSR)
+@@ -298,12 +297,12 @@ static void pl010_break_ctl(struct uart_
+ 	unsigned int lcr_h;
+ 
+ 	spin_lock_irqsave(&uap->port.lock, flags);
+-	lcr_h = readb(uap->port.membase + UART010_LCRH);
++	lcr_h = __raw_readl(uap->port.membase + UART010_LCRH);
+ 	if (break_state == -1)
+ 		lcr_h |= UART01x_LCRH_BRK;
+ 	else
+ 		lcr_h &= ~UART01x_LCRH_BRK;
+-	writel(lcr_h, uap->port.membase + UART010_LCRH);
++	__raw_writel(lcr_h, uap->port.membase + UART010_LCRH);
+ 	spin_unlock_irqrestore(&uap->port.lock, flags);
+ }
+ 
+@@ -335,12 +334,12 @@ static int pl010_startup(struct uart_por
+ 	/*
+ 	 * initialise the old status of the modem signals
+ 	 */
+-	uap->old_status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
++	uap->old_status = __raw_readl(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY;
+ 
+ 	/*
+ 	 * Finally, enable interrupts
+ 	 */
+-	writel(UART01x_CR_UARTEN | UART010_CR_RIE | UART010_CR_RTIE,
++	__raw_writel(UART01x_CR_UARTEN | UART010_CR_RIE | UART010_CR_RTIE,
+ 	       uap->port.membase + UART010_CR);
+ 
+ 	return 0;
+@@ -365,10 +364,10 @@ static void pl010_shutdown(struct uart_p
+ 	/*
+ 	 * disable all interrupts, disable the port
+ 	 */
+-	writel(0, uap->port.membase + UART010_CR);
++	__raw_writel(0, uap->port.membase + UART010_CR);
+ 
+ 	/* disable break condition and fifos */
+-	writel(readb(uap->port.membase + UART010_LCRH) &
++	__raw_writel(__raw_readl(uap->port.membase + UART010_LCRH) &
+ 		~(UART01x_LCRH_BRK | UART01x_LCRH_FEN),
+ 	       uap->port.membase + UART010_LCRH);
+ 
+@@ -391,7 +390,7 @@ pl010_set_termios(struct uart_port *port
+ 	/*
+ 	 * 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) {
+@@ -454,25 +453,25 @@ pl010_set_termios(struct uart_port *port
+ 		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 = __raw_readl(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE;
+ 
+ 	if (UART_ENABLE_MS(port, termios->c_cflag))
+ 		old_cr |= UART010_CR_MSIE;
+ 
+-	writel(0, uap->port.membase + UART010_CR);
++	__raw_writel(0, uap->port.membase + UART010_CR);
+ 
+ 	/* Set baud rate */
+ 	quot -= 1;
+-	writel((quot & 0xf00) >> 8, uap->port.membase + UART010_LCRM);
+-	writel(quot & 0xff, uap->port.membase + UART010_LCRL);
++	__raw_writel((quot & 0xf00) >> 8, uap->port.membase + UART010_LCRM);
++	__raw_writel(quot & 0xff, uap->port.membase + UART010_LCRL);
+ 
+ 	/*
+ 	 * ----------v----------v----------v----------v-----
+ 	 * NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L
+ 	 * ----------^----------^----------^----------^-----
+ 	 */
+-	writel(lcr_h, uap->port.membase + UART010_LCRH);
+-	writel(old_cr, uap->port.membase + UART010_CR);
++	__raw_writel(lcr_h, uap->port.membase + UART010_LCRH);
++	__raw_writel(old_cr, uap->port.membase + UART010_CR);
+ 
+ 	spin_unlock_irqrestore(&uap->port.lock, flags);
+ }
+@@ -554,7 +553,7 @@ static struct uart_ops amba_pl010_pops =
+ 	.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
+ 
+@@ -564,10 +563,10 @@ static void pl010_console_putchar(struct
+ 	unsigned int status;
+ 
+ 	do {
+-		status = readb(uap->port.membase + UART01x_FR);
++		status = __raw_readl(uap->port.membase + UART01x_FR);
+ 		barrier();
+ 	} while (!UART_TX_READY(status));
+-	writel(ch, uap->port.membase + UART01x_DR);
++	__raw_writel(ch, uap->port.membase + UART01x_DR);
+ }
+ 
+ static void
+@@ -581,8 +580,8 @@ pl010_console_write(struct console *co,
+ 	/*
+ 	 *	First save the CR then disable the interrupts
+ 	 */
+-	old_cr = readb(uap->port.membase + UART010_CR);
+-	writel(UART01x_CR_UARTEN, uap->port.membase + UART010_CR);
++	old_cr = __raw_readl(uap->port.membase + UART010_CR);
++	__raw_writel(UART01x_CR_UARTEN, uap->port.membase + UART010_CR);
+ 
+ 	uart_console_write(&uap->port, s, count, pl010_console_putchar);
+ 
+@@ -591,10 +590,10 @@ pl010_console_write(struct console *co,
+ 	 *	and restore the TCR
+ 	 */
+ 	do {
+-		status = readb(uap->port.membase + UART01x_FR);
++		status = __raw_readl(uap->port.membase + UART01x_FR);
+ 		barrier();
+ 	} while (status & UART01x_FR_BUSY);
+-	writel(old_cr, uap->port.membase + UART010_CR);
++	__raw_writel(old_cr, uap->port.membase + UART010_CR);
+ 
+ 	clk_disable(uap->clk);
+ }
+@@ -603,9 +602,9 @@ static void __init
+ 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 (__raw_readl(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) {
+ 		unsigned int lcr_h, quot;
+-		lcr_h = readb(uap->port.membase + UART010_LCRH);
++		lcr_h = __raw_readl(uap->port.membase + UART010_LCRH);
+ 
+ 		*parity = 'n';
+ 		if (lcr_h & UART01x_LCRH_PEN) {
+@@ -620,8 +619,8 @@ pl010_console_get_options(struct uart_am
+ 		else
+ 			*bits = 8;
+ 
+-		quot = readb(uap->port.membase + UART010_LCRL) |
+-		       readb(uap->port.membase + UART010_LCRM) << 8;
++		quot = __raw_readl(uap->port.membase + UART010_LCRL) |
++		       __raw_readl(uap->port.membase + UART010_LCRM) << 8;
+ 		*baud = uap->port.uartclk / (16 * (quot + 1));
+ 	}
+ }
+@@ -640,7 +639,7 @@ static int __init pl010_console_setup(st
+ 	 * 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)
+@@ -662,7 +661,7 @@ static int __init pl010_console_setup(st
+ 
+ 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,
+@@ -678,11 +677,11 @@ static struct console amba_console = {
+ 
+ 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/tty/serial/Kconfig
++++ b/drivers/tty/serial/Kconfig
+@@ -16,10 +16,25 @@ config SERIAL_AMBA_PL010
+ 	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
diff --git a/target/linux/adm8668/patches-3.3/201-amba_bus_hacks.patch b/target/linux/adm8668/patches-3.3/201-amba_bus_hacks.patch
new file mode 100644
index 000000000..2364d2a66
--- /dev/null
+++ b/target/linux/adm8668/patches-3.3/201-amba_bus_hacks.patch
@@ -0,0 +1,13 @@
+--- a/drivers/amba/bus.c
++++ b/drivers/amba/bus.c
+@@ -20,6 +20,10 @@
+ #include <asm/irq.h>
+ #include <asm/sizes.h>
+ 
++#ifndef NO_IRQ
++#define NO_IRQ		(-1)
++#endif
++
+ #define to_amba_driver(d)	container_of(d, struct amba_driver, drv)
+ 
+ static const struct amba_id *