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-rw-r--r--drivers/serial/serial_arc.c102
1 files changed, 70 insertions, 32 deletions
diff --git a/drivers/serial/serial_arc.c b/drivers/serial/serial_arc.c
index 0ee8ce5..54e596c 100644
--- a/drivers/serial/serial_arc.c
+++ b/drivers/serial/serial_arc.c
@@ -8,6 +8,7 @@
*/
#include <common.h>
+#include <dm.h>
#include <serial.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -23,21 +24,23 @@ struct arc_serial_regs {
unsigned int baudh;
};
+
+struct arc_serial_platdata {
+ struct arc_serial_regs *reg;
+ unsigned int uartclk;
+};
+
/* Bit definitions of STATUS register */
#define UART_RXEMPTY (1 << 5)
#define UART_OVERFLOW_ERR (1 << 1)
#define UART_TXEMPTY (1 << 7)
-struct arc_serial_regs *regs = (struct arc_serial_regs *)CONFIG_ARC_UART_BASE;
-
-static void arc_serial_setbrg(void)
+static int arc_serial_setbrg(struct udevice *dev, int baudrate)
{
- int arc_console_baud;
+ struct arc_serial_platdata *plat = dev->platdata;
+ struct arc_serial_regs *const regs = plat->reg;
+ int arc_console_baud = gd->cpu_clk / (baudrate * 4) - 1;
- if (!gd->baudrate)
- gd->baudrate = CONFIG_BAUDRATE;
-
- arc_console_baud = gd->cpu_clk / (gd->baudrate * 4) - 1;
writeb(arc_console_baud & 0xff, &regs->baudl);
#ifdef CONFIG_ARC
@@ -56,33 +59,49 @@ static void arc_serial_setbrg(void)
#else
writeb((arc_console_baud & 0xff00) >> 8, &regs->baudh);
#endif
-}
-static int arc_serial_init(void)
-{
- serial_setbrg();
return 0;
}
-static void arc_serial_putc(const char c)
+static int arc_serial_putc(struct udevice *dev, const char c)
{
+ struct arc_serial_platdata *plat = dev->platdata;
+ struct arc_serial_regs *const regs = plat->reg;
+
if (c == '\n')
- arc_serial_putc('\r');
+ arc_serial_putc(dev, '\r');
while (!(readb(&regs->status) & UART_TXEMPTY))
;
writeb(c, &regs->data);
+
+ return 0;
}
-static int arc_serial_tstc(void)
+static int arc_serial_tstc(struct arc_serial_regs *const regs)
{
return !(readb(&regs->status) & UART_RXEMPTY);
}
-static int arc_serial_getc(void)
+static int arc_serial_pending(struct udevice *dev, bool input)
+{
+ struct arc_serial_platdata *plat = dev->platdata;
+ struct arc_serial_regs *const regs = plat->reg;
+ uint32_t status = readb(&regs->status);
+
+ if (input)
+ return status & UART_RXEMPTY ? 0 : 1;
+ else
+ return status & UART_TXEMPTY ? 0 : 1;
+}
+
+static int arc_serial_getc(struct udevice *dev)
{
- while (!arc_serial_tstc())
+ struct arc_serial_platdata *plat = dev->platdata;
+ struct arc_serial_regs *const regs = plat->reg;
+
+ while (!arc_serial_tstc(regs))
;
/* Check for overflow errors */
@@ -92,23 +111,42 @@ static int arc_serial_getc(void)
return readb(&regs->data) & 0xFF;
}
-static struct serial_device arc_serial_drv = {
- .name = "arc_serial",
- .start = arc_serial_init,
- .stop = NULL,
- .setbrg = arc_serial_setbrg,
- .putc = arc_serial_putc,
- .puts = default_serial_puts,
- .getc = arc_serial_getc,
- .tstc = arc_serial_tstc,
-};
-
-void arc_serial_initialize(void)
+static int arc_serial_probe(struct udevice *dev)
{
- serial_register(&arc_serial_drv);
+ return 0;
}
-__weak struct serial_device *default_serial_console(void)
+static const struct dm_serial_ops arc_serial_ops = {
+ .putc = arc_serial_putc,
+ .pending = arc_serial_pending,
+ .getc = arc_serial_getc,
+ .setbrg = arc_serial_setbrg,
+};
+
+static const struct udevice_id arc_serial_ids[] = {
+ { .compatible = "snps,arc-uart" },
+ { }
+};
+
+static int arc_serial_ofdata_to_platdata(struct udevice *dev)
{
- return &arc_serial_drv;
+ struct arc_serial_platdata *plat = dev_get_platdata(dev);
+ DECLARE_GLOBAL_DATA_PTR;
+
+ plat->reg = (struct arc_serial_regs *)fdtdec_get_addr(gd->fdt_blob,
+ dev->of_offset, "reg");
+ plat->uartclk = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+ "clock-frequency", 0);
+
+ return 0;
}
+
+U_BOOT_DRIVER(serial_arc) = {
+ .name = "serial_arc",
+ .id = UCLASS_SERIAL,
+ .of_match = arc_serial_ids,
+ .ofdata_to_platdata = arc_serial_ofdata_to_platdata,
+ .probe = arc_serial_probe,
+ .ops = &arc_serial_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};