Merge branch 'u-boot/master' into 'u-boot-arm/master'

9 files changed, 173 insertions, 21 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 1686a1f951..54e6f26d38 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -66,6 +66,16 @@ config DEBUG_UART_CLOCK
 	  A default should be provided by your board, but if not you will need
 	  to use the correct value here.
 
+config DEBUG_UART_SHIFT
+	int "UART register shift"
+	depends on DEBUG_UART
+	default 0 if DEBUG_UART
+	help
+	  Some UARTs (notably ns16550) support different register layouts
+	  where the registers are spaced either as bytes, words or some other
+	  value. Use this value to specify the shift to use, where 0=byte
+	  registers, 2=32-bit word registers, etc.
+
 config UNIPHIER_SERIAL
 	bool "UniPhier on-chip UART support"
 	depends on ARCH_UNIPHIER && DM_SERIAL
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index b385852eee..d183eedbcb 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_TEGRA_SERIAL) += serial_tegra.o
 obj-$(CONFIG_UNIPHIER_SERIAL) += serial_uniphier.o
 obj-$(CONFIG_OMAP_SERIAL) += serial_omap.o
 obj-$(CONFIG_X86_SERIAL) += serial_x86.o
+obj-$(CONFIG_STM32_SERIAL) += serial_stm32.o
 
 ifndef CONFIG_SPL_BUILD
 obj-$(CONFIG_USB_TTY) += usbtty.o
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 03beab5a14..3d376d7580 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -8,6 +8,7 @@
 #include <dm.h>
 #include <errno.h>
 #include <fdtdec.h>
+#include <mapmem.h>
 #include <ns16550.h>
 #include <serial.h>
 #include <watchdog.h>
@@ -56,7 +57,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CONFIG_DM_SERIAL
 
-static inline void serial_out_shift(unsigned char *addr, int shift, int value)
+static inline void serial_out_shift(void *addr, int shift, int value)
 {
 #ifdef CONFIG_SYS_NS16550_PORT_MAPPED
 	outb(value, (ulong)addr);
@@ -71,7 +72,7 @@ static inline void serial_out_shift(unsigned char *addr, int shift, int value)
 #endif
 }
 
-static inline int serial_in_shift(unsigned char *addr, int shift)
+static inline int serial_in_shift(void *addr, int shift)
 {
 #ifdef CONFIG_SYS_NS16550_PORT_MAPPED
 	return inb((ulong)addr);
@@ -113,9 +114,11 @@ static int ns16550_readb(NS16550_t port, int offset)
 
 /* We can clean these up once everything is moved to driver model */
 #define serial_out(value, addr)	\
-	ns16550_writeb(com_port, addr - (unsigned char *)com_port, value)
+	ns16550_writeb(com_port, \
+		(unsigned char *)addr - (unsigned char *)com_port, value)
 #define serial_in(addr) \
-	ns16550_readb(com_port, addr - (unsigned char *)com_port)
+	ns16550_readb(com_port, \
+		(unsigned char *)addr - (unsigned char *)com_port)
 #endif
 
 static inline int calc_divisor(NS16550_t port, int clock, int baudrate)
@@ -172,7 +175,6 @@ void NS16550_init(NS16550_t com_port, int baud_divisor)
 			defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
 	serial_out(0x7, &com_port->mdr1);	/* mode select reset TL16C750*/
 #endif
-	NS16550_setbrg(com_port, 0);
 	serial_out(UART_MCRVAL, &com_port->mcr);
 	serial_out(UART_FCRVAL, &com_port->fcr);
 	if (baud_divisor != -1)
@@ -253,15 +255,19 @@ void debug_uart_init(void)
 	 */
 	baud_divisor = calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
 				    CONFIG_BAUDRATE);
-
-	serial_out_shift(&com_port->ier, 0, CONFIG_SYS_NS16550_IER);
-	serial_out_shift(&com_port->mcr, 0, UART_MCRVAL);
-	serial_out_shift(&com_port->fcr, 0, UART_FCRVAL);
-
-	serial_out_shift(&com_port->lcr, 0, UART_LCR_BKSE | UART_LCRVAL);
-	serial_out_shift(&com_port->dll, 0, baud_divisor & 0xff);
-	serial_out_shift(&com_port->dlm, 0, (baud_divisor >> 8) & 0xff);
-	serial_out_shift(&com_port->lcr, 0, UART_LCRVAL);
+	serial_out_shift(&com_port->ier, CONFIG_DEBUG_UART_SHIFT,
+			 CONFIG_SYS_NS16550_IER);
+	serial_out_shift(&com_port->mcr, CONFIG_DEBUG_UART_SHIFT, UART_MCRVAL);
+	serial_out_shift(&com_port->fcr, CONFIG_DEBUG_UART_SHIFT, UART_FCRVAL);
+
+	serial_out_shift(&com_port->lcr, CONFIG_DEBUG_UART_SHIFT,
+			 UART_LCR_BKSE | UART_LCRVAL);
+	serial_out_shift(&com_port->dll, CONFIG_DEBUG_UART_SHIFT,
+			 baud_divisor & 0xff);
+	serial_out_shift(&com_port->dlm, CONFIG_DEBUG_UART_SHIFT,
+			 (baud_divisor >> 8) & 0xff);
+	serial_out_shift(&com_port->lcr, CONFIG_DEBUG_UART_SHIFT,
+			 UART_LCRVAL);
 }
 
 static inline void _debug_uart_putc(int ch)
@@ -270,7 +276,7 @@ static inline void _debug_uart_putc(int ch)
 
 	while (!(serial_in_shift(&com_port->lsr, 0) & UART_LSR_THRE))
 		;
-	serial_out_shift(&com_port->thr, 0, ch);
+	serial_out_shift(&com_port->thr, CONFIG_DEBUG_UART_SHIFT, ch);
 }
 
 DEBUG_UART_FUNCS
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c
index 2de3737739..b8c2f48228 100644
--- a/drivers/serial/serial-uclass.c
+++ b/drivers/serial/serial-uclass.c
@@ -70,7 +70,7 @@ static void serial_find_console_or_panic(void)
 	if (uclass_get_device_by_seq(UCLASS_SERIAL, INDEX, &dev) &&
 	    uclass_get_device(UCLASS_SERIAL, INDEX, &dev) &&
 	    (uclass_first_device(UCLASS_SERIAL, &dev) || !dev))
-		panic("No serial driver found");
+		panic_str("No serial driver found");
 #undef INDEX
 	gd->cur_serial_dev = dev;
 }
@@ -251,7 +251,7 @@ static int serial_post_probe(struct udevice *dev)
 {
 	struct dm_serial_ops *ops = serial_get_ops(dev);
 #ifdef CONFIG_DM_STDIO
-	struct serial_dev_priv *upriv = dev->uclass_priv;
+	struct serial_dev_priv *upriv = dev_get_uclass_priv(dev);
 	struct stdio_dev sdev;
 #endif
 	int ret;
@@ -299,7 +299,7 @@ static int serial_post_probe(struct udevice *dev)
 static int serial_pre_remove(struct udevice *dev)
 {
 #ifdef CONFIG_SYS_STDIO_DEREGISTER
-	struct serial_dev_priv *upriv = dev->uclass_priv;
+	struct serial_dev_priv *upriv = dev_get_uclass_priv(dev);
 
 	if (stdio_deregister_dev(upriv->sdev, 0))
 		return -EPERM;
diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c
index 9f78492298..699c410d66 100644
--- a/drivers/serial/serial.c
+++ b/drivers/serial/serial.c
@@ -154,6 +154,7 @@ serial_initfunc(sa1100_serial_initialize);
 serial_initfunc(sandbox_serial_initialize);
 serial_initfunc(sconsole_serial_initialize);
 serial_initfunc(sh_serial_initialize);
+serial_initfunc(stm32_serial_initialize);
 serial_initfunc(uartlite_serial_initialize);
 serial_initfunc(zynq_serial_initialize);
 
@@ -246,6 +247,7 @@ void serial_initialize(void)
 	sandbox_serial_initialize();
 	sconsole_serial_initialize();
 	sh_serial_initialize();
+	stm32_serial_initialize();
 	uartlite_serial_initialize();
 	zynq_serial_initialize();
 
diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c
index 75eb6bd729..2124161734 100644
--- a/drivers/serial/serial_pl01x.c
+++ b/drivers/serial/serial_pl01x.c
@@ -95,7 +95,7 @@ static int pl01x_generic_serial_init(struct pl01x_regs *regs,
 	return 0;
 }
 
-static int set_line_control(struct pl01x_regs *regs)
+static int pl011_set_line_control(struct pl01x_regs *regs)
 {
 	unsigned int lcr;
 	/*
@@ -129,6 +129,9 @@ static int pl01x_generic_setbrg(struct pl01x_regs *regs, enum pl01x_type type,
 	case TYPE_PL010: {
 		unsigned int divisor;
 
+		/* disable everything */
+		writel(0, &regs->pl010_cr);
+
 		switch (baudrate) {
 		case 9600:
 			divisor = UART_PL010_BAUD_9600;
@@ -152,6 +155,12 @@ static int pl01x_generic_setbrg(struct pl01x_regs *regs, enum pl01x_type type,
 		writel((divisor & 0xf00) >> 8, &regs->pl010_lcrm);
 		writel(divisor & 0xff, &regs->pl010_lcrl);
 
+		/*
+		 * Set line control for the PL010 to be 8 bits, 1 stop bit,
+		 * no parity, fifo enabled
+		 */
+		writel(UART_PL010_LCRH_WLEN_8 | UART_PL010_LCRH_FEN,
+		       &regs->pl010_lcrh);
 		/* Finally, enable the UART */
 		writel(UART_PL010_CR_UARTEN, &regs->pl010_cr);
 		break;
@@ -178,7 +187,7 @@ static int pl01x_generic_setbrg(struct pl01x_regs *regs, enum pl01x_type type,
 		writel(divider, &regs->pl011_ibrd);
 		writel(fraction, &regs->pl011_fbrd);
 
-		set_line_control(regs);
+		pl011_set_line_control(regs);
 		/* Finally, enable the UART */
 		writel(UART_PL011_CR_UARTEN | UART_PL011_CR_TXE |
 		       UART_PL011_CR_RXE | UART_PL011_CR_RTS, &regs->pl011_cr);
diff --git a/drivers/serial/serial_stm32.c b/drivers/serial/serial_stm32.c
new file mode 100644
index 0000000000..3c800961d1
--- /dev/null
+++ b/drivers/serial/serial_stm32.c
@@ -0,0 +1,117 @@
+/*
+ * (C) Copyright 2015
+ * Kamil Lulko, <rev13@wp.pl>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <serial.h>
+#include <asm/arch/stm32.h>
+
+#define STM32_USART1_BASE	(STM32_APB2PERIPH_BASE + 0x1000)
+#define RCC_APB2ENR_USART1EN	(1 << 4)
+
+#define USART_BASE		STM32_USART1_BASE
+#define RCC_USART_ENABLE	RCC_APB2ENR_USART1EN
+
+struct stm32_serial {
+	u32 sr;
+	u32 dr;
+	u32 brr;
+	u32 cr1;
+	u32 cr2;
+	u32 cr3;
+	u32 gtpr;
+};
+
+#define USART_CR1_RE		(1 << 2)
+#define USART_CR1_TE		(1 << 3)
+#define USART_CR1_UE		(1 << 13)
+
+#define USART_SR_FLAG_RXNE	(1 << 5)
+#define USART_SR_FLAG_TXE	(1 << 7)
+
+#define USART_BRR_F_MASK	0xF
+#define USART_BRR_M_SHIFT	4
+#define USART_BRR_M_MASK	0xFFF0
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void stm32_serial_setbrg(void)
+{
+	serial_init();
+}
+
+static int stm32_serial_init(void)
+{
+	struct stm32_serial *usart = (struct stm32_serial *)USART_BASE;
+	u32 clock, int_div, frac_div, tmp;
+
+	if ((USART_BASE & STM32_BUS_MASK) == STM32_APB1PERIPH_BASE) {
+		setbits_le32(&STM32_RCC->apb1enr, RCC_USART_ENABLE);
+		clock = clock_get(CLOCK_APB1);
+	} else if ((USART_BASE & STM32_BUS_MASK) == STM32_APB2PERIPH_BASE) {
+		setbits_le32(&STM32_RCC->apb2enr, RCC_USART_ENABLE);
+		clock = clock_get(CLOCK_APB2);
+	} else {
+		return -1;
+	}
+
+	int_div = (25 * clock) / (4 * gd->baudrate);
+	tmp = ((int_div / 100) << USART_BRR_M_SHIFT) & USART_BRR_M_MASK;
+	frac_div = int_div - (100 * (tmp >> USART_BRR_M_SHIFT));
+	tmp |= (((frac_div * 16) + 50) / 100) & USART_BRR_F_MASK;
+
+	writel(tmp, &usart->brr);
+	setbits_le32(&usart->cr1, USART_CR1_RE | USART_CR1_TE | USART_CR1_UE);
+
+	return 0;
+}
+
+static int stm32_serial_getc(void)
+{
+	struct stm32_serial *usart = (struct stm32_serial *)USART_BASE;
+	while ((readl(&usart->sr) & USART_SR_FLAG_RXNE) == 0)
+		;
+	return readl(&usart->dr);
+}
+
+static void stm32_serial_putc(const char c)
+{
+	struct stm32_serial *usart = (struct stm32_serial *)USART_BASE;
+	while ((readl(&usart->sr) & USART_SR_FLAG_TXE) == 0)
+		;
+	writel(c, &usart->dr);
+}
+
+static int stm32_serial_tstc(void)
+{
+	struct stm32_serial *usart = (struct stm32_serial *)USART_BASE;
+	u8 ret;
+
+	ret = readl(&usart->sr) & USART_SR_FLAG_RXNE;
+	return ret;
+}
+
+static struct serial_device stm32_serial_drv = {
+	.name	= "stm32_serial",
+	.start	= stm32_serial_init,
+	.stop	= NULL,
+	.setbrg	= stm32_serial_setbrg,
+	.putc	= stm32_serial_putc,
+	.puts	= default_serial_puts,
+	.getc	= stm32_serial_getc,
+	.tstc	= stm32_serial_tstc,
+};
+
+void stm32_serial_initialize(void)
+{
+	serial_register(&stm32_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+	return &stm32_serial_drv;
+}
diff --git a/drivers/serial/serial_uniphier.c b/drivers/serial/serial_uniphier.c
index 98e3b812e0..74547eb692 100644
--- a/drivers/serial/serial_uniphier.c
+++ b/drivers/serial/serial_uniphier.c
@@ -11,6 +11,7 @@
 #include <asm/errno.h>
 #include <dm/device.h>
 #include <dm/platform_data/serial-uniphier.h>
+#include <mapmem.h>
 #include <serial.h>
 #include <fdtdec.h>
 
diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c
index 3e2b8dc183..9278763164 100644
--- a/drivers/serial/serial_zynq.c
+++ b/drivers/serial/serial_zynq.c
@@ -48,10 +48,16 @@ static void uart_zynq_serial_setbrg(const int port)
 	/* Calculation results. */
 	unsigned int calc_bauderror, bdiv, bgen;
 	unsigned long calc_baud = 0;
-	unsigned long baud = gd->baudrate;
+	unsigned long baud;
 	unsigned long clock = get_uart_clk(port);
 	struct uart_zynq *regs = uart_zynq_ports[port];
 
+	/* Covering case where input clock is so slow */
+	if (clock < 1000000 && gd->baudrate > 4800)
+		gd->baudrate = 4800;
+
+	baud = gd->baudrate;
+
 	/*                master clock
 	 * Baud rate = ------------------
 	 *              bgen * (bdiv + 1)