* Copyright (C) 2012-2014 Panasonic Corporation
* Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
*
- * Based on serial_ns16550.c
- * (C) Copyright 2000
- * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
- *
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <dm/device.h>
+#include <dm/platform_data/serial-uniphier.h>
#include <serial.h>
#define UART_REG(x) \
#define UART_LSR_DR 0x01 /* Data ready */
#define UART_LSR_THRE 0x20 /* Xmit holding register empty */
-DECLARE_GLOBAL_DATA_PTR;
+struct uniphier_serial_private_data {
+ struct uniphier_serial __iomem *membase;
+};
+
+#define uniphier_serial_port(dev) \
+ ((struct uniphier_serial_private_data *)dev_get_priv(dev))->membase
-static void uniphier_serial_init(struct uniphier_serial *port)
+int uniphier_serial_setbrg(struct udevice *dev, int baudrate)
{
+ struct uniphier_serial_platform_data *plat = dev_get_platdata(dev);
+ struct uniphier_serial __iomem *port = uniphier_serial_port(dev);
const unsigned int mode_x_div = 16;
unsigned int divisor;
writeb(UART_LCR_WLS_8, &port->lcr);
- divisor = DIV_ROUND_CLOSEST(CONFIG_SYS_UNIPHIER_UART_CLK,
- mode_x_div * gd->baudrate);
+ divisor = DIV_ROUND_CLOSEST(plat->uartclk, mode_x_div * baudrate);
writew(divisor, &port->dlr);
-}
-static void uniphier_serial_setbrg(struct uniphier_serial *port)
-{
- uniphier_serial_init(port);
+ return 0;
}
-static int uniphier_serial_tstc(struct uniphier_serial *port)
+static int uniphier_serial_getc(struct udevice *dev)
{
- return (readb(&port->lsr) & UART_LSR_DR) != 0;
-}
+ struct uniphier_serial __iomem *port = uniphier_serial_port(dev);
-static int uniphier_serial_getc(struct uniphier_serial *port)
-{
- while (!uniphier_serial_tstc(port))
- ;
+ if (!(readb(&port->lsr) & UART_LSR_DR))
+ return -EAGAIN;
return readb(&port->rbr);
}
-static void uniphier_serial_putc(struct uniphier_serial *port, const char c)
+static int uniphier_serial_putc(struct udevice *dev, const char c)
{
- if (c == '\n')
- uniphier_serial_putc(port, '\r');
+ struct uniphier_serial __iomem *port = uniphier_serial_port(dev);
- while (!(readb(&port->lsr) & UART_LSR_THRE))
- ;
+ if (!(readb(&port->lsr) & UART_LSR_THRE))
+ return -EAGAIN;
writeb(c, &port->thr);
+
+ return 0;
}
-static struct uniphier_serial *serial_ports[4] = {
-#ifdef CONFIG_SYS_UNIPHIER_SERIAL_BASE0
- (struct uniphier_serial *)CONFIG_SYS_UNIPHIER_SERIAL_BASE0,
-#else
- NULL,
-#endif
-#ifdef CONFIG_SYS_UNIPHIER_SERIAL_BASE1
- (struct uniphier_serial *)CONFIG_SYS_UNIPHIER_SERIAL_BASE1,
-#else
- NULL,
-#endif
-#ifdef CONFIG_SYS_UNIPHIER_SERIAL_BASE2
- (struct uniphier_serial *)CONFIG_SYS_UNIPHIER_SERIAL_BASE2,
-#else
- NULL,
-#endif
-#ifdef CONFIG_SYS_UNIPHIER_SERIAL_BASE3
- (struct uniphier_serial *)CONFIG_SYS_UNIPHIER_SERIAL_BASE3,
-#else
- NULL,
-#endif
-};
+int uniphier_serial_probe(struct udevice *dev)
+{
+ struct uniphier_serial_private_data *priv = dev_get_priv(dev);
+ struct uniphier_serial_platform_data *plat = dev_get_platdata(dev);
-/* Multi serial device functions */
-#define DECLARE_ESERIAL_FUNCTIONS(port) \
- static int eserial##port##_init(void) \
- { \
- uniphier_serial_init(serial_ports[port]); \
- return 0 ; \
- } \
- static void eserial##port##_setbrg(void) \
- { \
- uniphier_serial_setbrg(serial_ports[port]); \
- } \
- static int eserial##port##_getc(void) \
- { \
- return uniphier_serial_getc(serial_ports[port]); \
- } \
- static int eserial##port##_tstc(void) \
- { \
- return uniphier_serial_tstc(serial_ports[port]); \
- } \
- static void eserial##port##_putc(const char c) \
- { \
- uniphier_serial_putc(serial_ports[port], c); \
- }
-
-/* Serial device descriptor */
-#define INIT_ESERIAL_STRUCTURE(port, __name) { \
- .name = __name, \
- .start = eserial##port##_init, \
- .stop = NULL, \
- .setbrg = eserial##port##_setbrg, \
- .getc = eserial##port##_getc, \
- .tstc = eserial##port##_tstc, \
- .putc = eserial##port##_putc, \
- .puts = default_serial_puts, \
-}
+ priv->membase = map_sysmem(plat->base, sizeof(struct uniphier_serial));
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE0)
-DECLARE_ESERIAL_FUNCTIONS(0);
-struct serial_device uniphier_serial0_device =
- INIT_ESERIAL_STRUCTURE(0, "ttyS0");
-#endif
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE1)
-DECLARE_ESERIAL_FUNCTIONS(1);
-struct serial_device uniphier_serial1_device =
- INIT_ESERIAL_STRUCTURE(1, "ttyS1");
-#endif
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE2)
-DECLARE_ESERIAL_FUNCTIONS(2);
-struct serial_device uniphier_serial2_device =
- INIT_ESERIAL_STRUCTURE(2, "ttyS2");
-#endif
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE3)
-DECLARE_ESERIAL_FUNCTIONS(3);
-struct serial_device uniphier_serial3_device =
- INIT_ESERIAL_STRUCTURE(3, "ttyS3");
-#endif
+ if (!priv->membase)
+ return -ENOMEM;
-__weak struct serial_device *default_serial_console(void)
+ return 0;
+}
+
+int uniphier_serial_remove(struct udevice *dev)
{
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE0)
- return &uniphier_serial0_device;
-#elif defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE1)
- return &uniphier_serial1_device;
-#elif defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE2)
- return &uniphier_serial2_device;
-#elif defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE3)
- return &uniphier_serial3_device;
-#else
-#error "No uniphier serial ports configured."
-#endif
+ unmap_sysmem(uniphier_serial_port(dev));
+
+ return 0;
}
-void uniphier_serial_initialize(void)
+#ifdef CONFIG_OF_CONTROL
+static const struct udevice_id uniphier_uart_of_match = {
+ { .compatible = "panasonic,uniphier-uart"},
+ {},
+};
+
+static int uniphier_serial_ofdata_to_platdata(struct udevice *dev)
{
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE0)
- serial_register(&uniphier_serial0_device);
-#endif
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE1)
- serial_register(&uniphier_serial1_device);
-#endif
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE2)
- serial_register(&uniphier_serial2_device);
-#endif
-#if defined(CONFIG_SYS_UNIPHIER_SERIAL_BASE3)
- serial_register(&uniphier_serial3_device);
-#endif
+ /*
+ * TODO: Masahiro Yamada (yamada.m@jp.panasonic.com)
+ *
+ * Implement conversion code from DTB to platform data
+ * when supporting CONFIG_OF_CONTROL on UniPhir platform.
+ */
}
+#endif
+
+static const struct dm_serial_ops uniphier_serial_ops = {
+ .setbrg = uniphier_serial_setbrg,
+ .getc = uniphier_serial_getc,
+ .putc = uniphier_serial_putc,
+};
+
+U_BOOT_DRIVER(uniphier_serial) = {
+ .name = DRIVER_NAME,
+ .id = UCLASS_SERIAL,
+ .of_match = of_match_ptr(uniphier_uart_of_match),
+ .ofdata_to_platdata = of_match_ptr(uniphier_serial_ofdata_to_platdata),
+ .probe = uniphier_serial_probe,
+ .remove = uniphier_serial_remove,
+ .priv_auto_alloc_size = sizeof(struct uniphier_serial_private_data),
+ .platdata_auto_alloc_size =
+ sizeof(struct uniphier_serial_platform_data),
+ .ops = &uniphier_serial_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
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