+// SPDX-License-Identifier: GPL-2.0+
/*
- * (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
+ * (C) Copyright 2008 - 2015 Michal Simek <monstr@monstr.eu>
* Clean driver and add xilinx constant from header file
*
* (C) Copyright 2004 Atmark Techno, Inc.
* Yasushi SHOJI <yashi@atmark-techno.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
+#include <dm.h>
#include <asm/io.h>
+#include <linux/bitops.h>
#include <linux/compiler.h>
#include <serial.h>
-#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
-#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
-#define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
+#define SR_TX_FIFO_FULL BIT(3) /* transmit FIFO full */
+#define SR_TX_FIFO_EMPTY BIT(2) /* transmit FIFO empty */
+#define SR_RX_FIFO_VALID_DATA BIT(0) /* data in receive FIFO */
+#define SR_RX_FIFO_FULL BIT(1) /* receive FIFO full */
+
+#define ULITE_CONTROL_RST_TX 0x01
+#define ULITE_CONTROL_RST_RX 0x02
struct uartlite {
unsigned int rx_fifo;
unsigned int tx_fifo;
unsigned int status;
+ unsigned int control;
};
-static struct uartlite *userial_ports[4] = {
-#ifdef XILINX_UARTLITE_BASEADDR
- [0] = (struct uartlite *)XILINX_UARTLITE_BASEADDR,
-#endif
-#ifdef XILINX_UARTLITE_BASEADDR1
- [1] = (struct uartlite *)XILINX_UARTLITE_BASEADDR1,
-#endif
-#ifdef XILINX_UARTLITE_BASEADDR2
- [2] = (struct uartlite *)XILINX_UARTLITE_BASEADDR2,
-#endif
-#ifdef XILINX_UARTLITE_BASEADDR3
- [3] = (struct uartlite *)XILINX_UARTLITE_BASEADDR3
-#endif
+struct uartlite_platdata {
+ struct uartlite *regs;
};
-void uartlite_serial_putc(const char c, const int port)
+static int uartlite_serial_putc(struct udevice *dev, const char ch)
{
- struct uartlite *regs = userial_ports[port];
+ struct uartlite_platdata *plat = dev_get_platdata(dev);
+ struct uartlite *regs = plat->regs;
- if (c == '\n')
- uartlite_serial_putc('\r', port);
+ if (in_be32(®s->status) & SR_TX_FIFO_FULL)
+ return -EAGAIN;
- while (in_be32(®s->status) & SR_TX_FIFO_FULL)
- ;
- out_be32(®s->tx_fifo, c & 0xff);
-}
+ out_be32(®s->tx_fifo, ch & 0xff);
-void uartlite_serial_puts(const char *s, const int port)
-{
- while (*s)
- uartlite_serial_putc(*s++, port);
+ return 0;
}
-int uartlite_serial_getc(const int port)
+static int uartlite_serial_getc(struct udevice *dev)
{
- struct uartlite *regs = userial_ports[port];
+ struct uartlite_platdata *plat = dev_get_platdata(dev);
+ struct uartlite *regs = plat->regs;
+
+ if (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA))
+ return -EAGAIN;
- while (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA))
- ;
return in_be32(®s->rx_fifo) & 0xff;
}
-int uartlite_serial_tstc(const int port)
+static int uartlite_serial_pending(struct udevice *dev, bool input)
{
- struct uartlite *regs = userial_ports[port];
+ struct uartlite_platdata *plat = dev_get_platdata(dev);
+ struct uartlite *regs = plat->regs;
+
+ if (input)
+ return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA;
- return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA;
+ return !(in_be32(®s->status) & SR_TX_FIFO_EMPTY);
}
-static int uartlite_serial_init(const int port)
+static int uartlite_serial_probe(struct udevice *dev)
{
- if (userial_ports[port])
- return 0;
- return -1;
+ struct uartlite_platdata *plat = dev_get_platdata(dev);
+ struct uartlite *regs = plat->regs;
+
+ out_be32(®s->control, 0);
+ out_be32(®s->control, ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX);
+ in_be32(®s->control);
+
+ return 0;
}
-/* Multi serial device functions */
-#define DECLARE_ESERIAL_FUNCTIONS(port) \
- int userial##port##_init(void) \
- { return uartlite_serial_init(port); } \
- void userial##port##_setbrg(void) {} \
- int userial##port##_getc(void) \
- { return uartlite_serial_getc(port); } \
- int userial##port##_tstc(void) \
- { return uartlite_serial_tstc(port); } \
- void userial##port##_putc(const char c) \
- { uartlite_serial_putc(c, port); } \
- void userial##port##_puts(const char *s) \
- { uartlite_serial_puts(s, port); }
-
-/* Serial device descriptor */
-#define INIT_ESERIAL_STRUCTURE(port, __name) { \
- .name = __name, \
- .start = userial##port##_init, \
- .stop = NULL, \
- .setbrg = userial##port##_setbrg, \
- .getc = userial##port##_getc, \
- .tstc = userial##port##_tstc, \
- .putc = userial##port##_putc, \
- .puts = userial##port##_puts, \
+static int uartlite_serial_ofdata_to_platdata(struct udevice *dev)
+{
+ struct uartlite_platdata *plat = dev_get_platdata(dev);
+
+ plat->regs = (struct uartlite *)devfdt_get_addr(dev);
+
+ return 0;
}
-DECLARE_ESERIAL_FUNCTIONS(0);
-struct serial_device uartlite_serial0_device =
- INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
-DECLARE_ESERIAL_FUNCTIONS(1);
-struct serial_device uartlite_serial1_device =
- INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
-DECLARE_ESERIAL_FUNCTIONS(2);
-struct serial_device uartlite_serial2_device =
- INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
-DECLARE_ESERIAL_FUNCTIONS(3);
-struct serial_device uartlite_serial3_device =
- INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
-
-__weak struct serial_device *default_serial_console(void)
+static const struct dm_serial_ops uartlite_serial_ops = {
+ .putc = uartlite_serial_putc,
+ .pending = uartlite_serial_pending,
+ .getc = uartlite_serial_getc,
+};
+
+static const struct udevice_id uartlite_serial_ids[] = {
+ { .compatible = "xlnx,opb-uartlite-1.00.b", },
+ { .compatible = "xlnx,xps-uartlite-1.00.a" },
+ { }
+};
+
+U_BOOT_DRIVER(serial_uartlite) = {
+ .name = "serial_uartlite",
+ .id = UCLASS_SERIAL,
+ .of_match = uartlite_serial_ids,
+ .ofdata_to_platdata = uartlite_serial_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct uartlite_platdata),
+ .probe = uartlite_serial_probe,
+ .ops = &uartlite_serial_ops,
+};
+
+#ifdef CONFIG_DEBUG_UART_UARTLITE
+
+#include <debug_uart.h>
+
+static inline void _debug_uart_init(void)
{
- if (userial_ports[0])
- return &uartlite_serial0_device;
- if (userial_ports[1])
- return &uartlite_serial1_device;
- if (userial_ports[2])
- return &uartlite_serial2_device;
- if (userial_ports[3])
- return &uartlite_serial3_device;
-
- return NULL;
+ struct uartlite *regs = (struct uartlite *)CONFIG_DEBUG_UART_BASE;
+
+ out_be32(®s->control, 0);
+ out_be32(®s->control, ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX);
+ in_be32(®s->control);
}
-void uartlite_serial_initialize(void)
+static inline void _debug_uart_putc(int ch)
{
-#ifdef XILINX_UARTLITE_BASEADDR
- serial_register(&uartlite_serial0_device);
-#endif /* XILINX_UARTLITE_BASEADDR */
-#ifdef XILINX_UARTLITE_BASEADDR1
- serial_register(&uartlite_serial1_device);
-#endif /* XILINX_UARTLITE_BASEADDR1 */
-#ifdef XILINX_UARTLITE_BASEADDR2
- serial_register(&uartlite_serial2_device);
-#endif /* XILINX_UARTLITE_BASEADDR2 */
-#ifdef XILINX_UARTLITE_BASEADDR3
- serial_register(&uartlite_serial3_device);
-#endif /* XILINX_UARTLITE_BASEADDR3 */
+ struct uartlite *regs = (struct uartlite *)CONFIG_DEBUG_UART_BASE;
+
+ while (in_be32(®s->status) & SR_TX_FIFO_FULL)
+ ;
+
+ out_be32(®s->tx_fifo, ch & 0xff);
}
+
+DEBUG_UART_FUNCS
+#endif
projects / oweals / u-boot.git / blobdiff