+// SPDX-License-Identifier: GPL-2.0+
/*
- * Copyright (c) 2014 Google, Inc
+ * Texas Instruments' OMAP serial driver
*
- * SPDX-License-Identifier: GPL-2.0+
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ * Lokesh Vutla <lokeshvutla@ti.com>
*/
#include <common.h>
#include <dm.h>
-#include <fdtdec.h>
+#include <dt-structs.h>
#include <ns16550.h>
#include <serial.h>
+#include <clk.h>
+#include <linux/err.h>
-DECLARE_GLOBAL_DATA_PTR;
+#ifndef CONFIG_SYS_NS16550_CLK
+#define CONFIG_SYS_NS16550_CLK 0
+#endif
-#ifdef CONFIG_OF_CONTROL
-static const struct udevice_id omap_serial_ids[] = {
- { .compatible = "ti,omap3-uart" },
- { }
-};
+#ifdef CONFIG_DEBUG_UART_OMAP
+
+#ifndef CONFIG_SYS_NS16550_IER
+#define CONFIG_SYS_NS16550_IER 0x00
+#endif
+
+#define UART_MCRVAL 0x00
+#define UART_LCRVAL UART_LCR_8N1
+static inline void serial_out_shift(void *addr, int shift, int value)
+{
+#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
+ outb(value, (ulong)addr);
+#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
+ out_le32(addr, value);
+#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
+ out_be32(addr, value);
+#elif defined(CONFIG_SYS_NS16550_MEM32)
+ writel(value, addr);
+#elif defined(CONFIG_SYS_BIG_ENDIAN)
+ writeb(value, addr + (1 << shift) - 1);
+#else
+ writeb(value, addr);
+#endif
+}
+
+static inline int serial_in_shift(void *addr, int shift)
+{
+#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
+ return inb((ulong)addr);
+#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
+ return in_le32(addr);
+#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
+ return in_be32(addr);
+#elif defined(CONFIG_SYS_NS16550_MEM32)
+ return readl(addr);
+#elif defined(CONFIG_SYS_BIG_ENDIAN)
+ return readb(addr + (1 << shift) - 1);
+#else
+ return readb(addr);
+#endif
+}
+
+#include <debug_uart.h>
+
+static inline void _debug_uart_init(void)
+{
+ struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
+ int baud_divisor;
+
+ baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
+ CONFIG_BAUDRATE);
+ serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
+ serial_dout(&com_port->mdr1, 0x7);
+ serial_dout(&com_port->mcr, UART_MCRVAL);
+ serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
+
+ serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
+ serial_dout(&com_port->dll, baud_divisor & 0xff);
+ serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
+ serial_dout(&com_port->lcr, UART_LCRVAL);
+ serial_dout(&com_port->mdr1, 0x0);
+}
+
+static inline void _debug_uart_putc(int ch)
+{
+ struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
+
+ while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
+ ;
+ serial_dout(&com_port->thr, ch);
+}
+
+DEBUG_UART_FUNCS
+
+#endif
+
+#if CONFIG_IS_ENABLED(DM_SERIAL)
+
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
static int omap_serial_ofdata_to_platdata(struct udevice *dev)
{
- struct ns16550_platdata *plat = dev_get_platdata(dev);
- int ret;
-
- ret = ns16550_serial_ofdata_to_platdata(dev);
- if (ret)
- return ret;
- plat->clock = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
- "clock-frequency", -1);
+ struct ns16550_platdata *plat = dev->platdata;
+ fdt_addr_t addr;
+ struct clk clk;
+ int err;
+
+ /* try Processor Local Bus device first */
+ addr = dev_read_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE);
+
+ plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0);
plat->reg_shift = 2;
+ err = clk_get_by_index(dev, 0, &clk);
+ if (!err) {
+ err = clk_get_rate(&clk);
+ if (!IS_ERR_VALUE(err))
+ plat->clock = err;
+ } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) {
+ debug("omap serial failed to get clock\n");
+ return err;
+ }
+
+ if (!plat->clock)
+ plat->clock = dev_read_u32_default(dev, "clock-frequency",
+ CONFIG_SYS_NS16550_CLK);
+ if (!plat->clock) {
+ debug("omap serial clock not defined\n");
+ return -EINVAL;
+ }
+
+ plat->fcr = UART_FCR_DEFVAL;
+
return 0;
}
-#endif
-U_BOOT_DRIVER(serial_omap_ns16550) = {
- .name = "serial_omap",
+static const struct udevice_id omap_serial_ids[] = {
+ { .compatible = "ti,omap2-uart", },
+ { .compatible = "ti,omap3-uart", },
+ { .compatible = "ti,omap4-uart", },
+ { .compatible = "ti,am3352-uart", },
+ { .compatible = "ti,am4372-uart", },
+ { .compatible = "ti,dra742-uart", },
+ { .compatible = "ti,am654-uart", },
+ {}
+};
+#endif /* OF_CONTROL && !OF_PLATDATA */
+
+#if CONFIG_IS_ENABLED(SERIAL_PRESENT)
+U_BOOT_DRIVER(omap_serial) = {
+ .name = "omap_serial",
.id = UCLASS_SERIAL,
- .of_match = of_match_ptr(omap_serial_ids),
- .ofdata_to_platdata = of_match_ptr(omap_serial_ofdata_to_platdata),
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
+ .of_match = omap_serial_ids,
+ .ofdata_to_platdata = omap_serial_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
+#endif
.priv_auto_alloc_size = sizeof(struct NS16550),
.probe = ns16550_serial_probe,
.ops = &ns16550_serial_ops,
+#if !CONFIG_IS_ENABLED(OF_CONTROL)
.flags = DM_FLAG_PRE_RELOC,
+#endif
};
+#endif
+#endif /* DM_SERIAL */
projects / oweals / u-boot.git / blobdiff