arm: zynq: Move serial driver to driver model

Update this driver to use driver model and change all users.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

1 files changed, 65 insertions, 98 deletions

diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c
index 926ba51..88bebed 100644
--- a/drivers/serial/serial_zynq.c
+++ b/drivers/serial/serial_zynq.c
@@ -6,6 +6,8 @@
  */
 
 #include <common.h>
+#include <debug_uart.h>
+#include <dm.h>
 #include <errno.h>
 #include <fdtdec.h>
 #include <watchdog.h>
@@ -18,6 +20,7 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 #define ZYNQ_UART_SR_TXFULL	0x00000010 /* TX FIFO full */
+#define ZYNQ_UART_SR_TXACTIVE	(1 << 11)  /* TX active */
 #define ZYNQ_UART_SR_RXEMPTY	0x00000002 /* RX FIFO empty */
 
 #define ZYNQ_UART_CR_TX_EN	0x00000010 /* TX enabled */
@@ -38,9 +41,8 @@ struct uart_zynq {
 	u32 baud_rate_divider; /* 0x34 - Baud Rate Divider [7:0] */
 };
 
-static struct uart_zynq *uart_zynq_ports[2] = {
-	[0] = (struct uart_zynq *)ZYNQ_SERIAL_BASEADDR0,
-	[1] = (struct uart_zynq *)ZYNQ_SERIAL_BASEADDR1,
+struct zynq_uart_priv {
+	struct uart_zynq *regs;
 };
 
 /* Set up the baud rate in gd struct */
@@ -84,15 +86,6 @@ static void _uart_zynq_serial_setbrg(struct uart_zynq *regs,
 	writel(bgen, &regs->baud_rate_gen);
 }
 
-/* Set up the baud rate in gd struct */
-static void uart_zynq_serial_setbrg(const int port)
-{
-	unsigned long clock = get_uart_clk(port);
-	struct uart_zynq *regs = uart_zynq_ports[port];
-
-	return _uart_zynq_serial_setbrg(regs, clock, gd->baudrate);
-}
-
 /* Initialize the UART, with...some settings. */
 static void _uart_zynq_serial_init(struct uart_zynq *regs)
 {
@@ -102,20 +95,6 @@ static void _uart_zynq_serial_init(struct uart_zynq *regs)
 	writel(ZYNQ_UART_MR_PARITY_NONE, &regs->mode); /* 8 bit, no parity */
 }
 
-/* Initialize the UART, with...some settings. */
-static int uart_zynq_serial_init(const int port)
-{
-	struct uart_zynq *regs = uart_zynq_ports[port];
-
-	if (!regs)
-		return -1;
-
-	_uart_zynq_serial_init(regs);
-	uart_zynq_serial_setbrg(port);
-
-	return 0;
-}
-
 static int _uart_zynq_serial_putc(struct uart_zynq *regs, const char c)
 {
 	if (readl(&regs->channel_sts) & ZYNQ_UART_SR_TXFULL)
@@ -126,103 +105,91 @@ static int _uart_zynq_serial_putc(struct uart_zynq *regs, const char c)
 	return 0;
 }
 
-static void uart_zynq_serial_putc(const char c, const int port)
+int zynq_serial_setbrg(struct udevice *dev, int baudrate)
 {
-	struct uart_zynq *regs = uart_zynq_ports[port];
+	struct zynq_uart_priv *priv = dev_get_priv(dev);
+	unsigned long clock = get_uart_clk(0);
 
-	while (_uart_zynq_serial_putc(regs, c) == -EAGAIN)
-		WATCHDOG_RESET();
+	_uart_zynq_serial_setbrg(priv->regs, clock, baudrate);
 
-	if (c == '\n') {
-		while (_uart_zynq_serial_putc(regs, '\r') == -EAGAIN)
-			WATCHDOG_RESET();
-	}
+	return 0;
 }
 
-static void uart_zynq_serial_puts(const char *s, const int port)
+static int zynq_serial_probe(struct udevice *dev)
 {
-	while (*s)
-		uart_zynq_serial_putc(*s++, port);
-}
+	struct zynq_uart_priv *priv = dev_get_priv(dev);
 
-static int uart_zynq_serial_tstc(const int port)
-{
-	struct uart_zynq *regs = uart_zynq_ports[port];
+	_uart_zynq_serial_init(priv->regs);
 
-	return (readl(&regs->channel_sts) & ZYNQ_UART_SR_RXEMPTY) == 0;
+	return 0;
 }
 
-static int uart_zynq_serial_getc(const int port)
+static int zynq_serial_getc(struct udevice *dev)
 {
-	struct uart_zynq *regs = uart_zynq_ports[port];
+	struct zynq_uart_priv *priv = dev_get_priv(dev);
+	struct uart_zynq *regs = priv->regs;
+
+	if (readl(&regs->channel_sts) & ZYNQ_UART_SR_RXEMPTY)
+		return -EAGAIN;
 
-	while (!uart_zynq_serial_tstc(port))
-		WATCHDOG_RESET();
 	return readl(&regs->tx_rx_fifo);
 }
 
-/* Multi serial device functions */
-#define DECLARE_PSSERIAL_FUNCTIONS(port) \
-	static int uart_zynq##port##_init(void) \
-				{ return uart_zynq_serial_init(port); } \
-	static void uart_zynq##port##_setbrg(void) \
-				{ return uart_zynq_serial_setbrg(port); } \
-	static int uart_zynq##port##_getc(void) \
-				{ return uart_zynq_serial_getc(port); } \
-	static int uart_zynq##port##_tstc(void) \
-				{ return uart_zynq_serial_tstc(port); } \
-	static void uart_zynq##port##_putc(const char c) \
-				{ uart_zynq_serial_putc(c, port); } \
-	static void uart_zynq##port##_puts(const char *s) \
-				{ uart_zynq_serial_puts(s, port); }
-
-/* Serial device descriptor */
-#define INIT_PSSERIAL_STRUCTURE(port, __name) {	\
-	  .name   = __name,			\
-	  .start  = uart_zynq##port##_init,	\
-	  .stop   = NULL,			\
-	  .setbrg = uart_zynq##port##_setbrg,	\
-	  .getc   = uart_zynq##port##_getc,	\
-	  .tstc   = uart_zynq##port##_tstc,	\
-	  .putc   = uart_zynq##port##_putc,	\
-	  .puts   = uart_zynq##port##_puts,	\
-}
+static int zynq_serial_putc(struct udevice *dev, const char ch)
+{
+	struct zynq_uart_priv *priv = dev_get_priv(dev);
 
-DECLARE_PSSERIAL_FUNCTIONS(0);
-static struct serial_device uart_zynq_serial0_device =
-	INIT_PSSERIAL_STRUCTURE(0, "ttyPS0");
-DECLARE_PSSERIAL_FUNCTIONS(1);
-static struct serial_device uart_zynq_serial1_device =
-	INIT_PSSERIAL_STRUCTURE(1, "ttyPS1");
+	return _uart_zynq_serial_putc(priv->regs, ch);
+}
 
-__weak struct serial_device *default_serial_console(void)
+static int zynq_serial_pending(struct udevice *dev, bool input)
 {
-	const void *blob = gd->fdt_blob;
-	int node;
-	unsigned int base_addr;
+	struct zynq_uart_priv *priv = dev_get_priv(dev);
+	struct uart_zynq *regs = priv->regs;
 
-	node = fdt_path_offset(blob, "serial0");
-	if (node < 0)
-		return NULL;
+	if (input)
+		return !(readl(&regs->channel_sts) & ZYNQ_UART_SR_RXEMPTY);
+	else
+		return !!(readl(&regs->channel_sts) & ZYNQ_UART_SR_TXACTIVE);
+}
 
-	base_addr = fdtdec_get_addr(blob, node, "reg");
-	if (base_addr == FDT_ADDR_T_NONE)
-		return NULL;
+static int zynq_serial_ofdata_to_platdata(struct udevice *dev)
+{
+	struct zynq_uart_priv *priv = dev_get_priv(dev);
+	fdt_addr_t addr;
 
-	if (base_addr == ZYNQ_SERIAL_BASEADDR0)
-		return &uart_zynq_serial0_device;
+	addr = fdtdec_get_addr(gd->fdt_blob, dev->of_offset, "reg");
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
 
-	if (base_addr == ZYNQ_SERIAL_BASEADDR1)
-		return &uart_zynq_serial1_device;
+	priv->regs = (struct uart_zynq *)addr;
 
-	return NULL;
+	return 0;
 }
 
-void zynq_serial_initialize(void)
-{
-	serial_register(&uart_zynq_serial0_device);
-	serial_register(&uart_zynq_serial1_device);
-}
+static const struct dm_serial_ops zynq_serial_ops = {
+	.putc = zynq_serial_putc,
+	.pending = zynq_serial_pending,
+	.getc = zynq_serial_getc,
+	.setbrg = zynq_serial_setbrg,
+};
+
+static const struct udevice_id zynq_serial_ids[] = {
+	{ .compatible = "xlnx,xuartps" },
+	{ .compatible = "cdns,uart-r1p8" },
+	{ }
+};
+
+U_BOOT_DRIVER(serial_s5p) = {
+	.name	= "serial_zynq",
+	.id	= UCLASS_SERIAL,
+	.of_match = zynq_serial_ids,
+	.ofdata_to_platdata = zynq_serial_ofdata_to_platdata,
+	.priv_auto_alloc_size = sizeof(struct zynq_uart_priv),
+	.probe = zynq_serial_probe,
+	.ops	= &zynq_serial_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
 
 #ifdef CONFIG_DEBUG_UART_ZYNQ