Add driver model support for OMAP_SERIAL while reusing the functions in ns16550.c Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com> Tested-by: Derald D. Woods <woods.technical@gmail.com>lime2-spi
Lokesh Vutla
6 years ago
committed by
Tom Rini
parent
8a86152db0
commit
5d754197a7
@ -0,0 +1,126 @@ |
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Texas Instruments' OMAP serial driver |
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* |
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* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
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* Lokesh Vutla <lokeshvutla@ti.com> |
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*/ |
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#include <common.h> |
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#include <debug_uart.h> |
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#include <dm.h> |
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#include <dt-structs.h> |
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#include <ns16550.h> |
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#include <serial.h> |
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#include <clk.h> |
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#ifndef CONFIG_SYS_NS16550_CLK |
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#define CONFIG_SYS_NS16550_CLK 0 |
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#endif |
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#ifdef CONFIG_DEBUG_UART_OMAP |
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#include <debug_uart.h> |
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static inline void _debug_uart_init(void) |
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{ |
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struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE; |
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int baud_divisor; |
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baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK, |
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CONFIG_BAUDRATE); |
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serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER); |
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serial_dout(&com_port->mdr1, 0x7); |
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serial_dout(&com_port->mcr, UART_MCRVAL); |
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serial_dout(&com_port->fcr, UART_FCR_DEFVAL); |
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serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL); |
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serial_dout(&com_port->dll, baud_divisor & 0xff); |
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serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff); |
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serial_dout(&com_port->lcr, UART_LCRVAL); |
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serial_dout(&com_port->mdr1, 0x0); |
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} |
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static inline void _debug_uart_putc(int ch) |
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{ |
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struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE; |
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while (!(serial_din(&com_port->lsr) & UART_LSR_THRE)) |
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; |
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serial_dout(&com_port->thr, ch); |
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} |
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DEBUG_UART_FUNCS |
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#endif |
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#if CONFIG_IS_ENABLED(DM_SERIAL) |
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#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) |
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static int omap_serial_ofdata_to_platdata(struct udevice *dev) |
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{ |
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struct ns16550_platdata *plat = dev->platdata; |
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fdt_addr_t addr; |
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struct clk clk; |
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int err; |
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/* try Processor Local Bus device first */ |
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addr = dev_read_addr(dev); |
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if (addr == FDT_ADDR_T_NONE) |
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return -EINVAL; |
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plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE); |
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plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0); |
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plat->reg_shift = 2; |
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err = clk_get_by_index(dev, 0, &clk); |
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if (!err) { |
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err = clk_get_rate(&clk); |
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if (!IS_ERR_VALUE(err)) |
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plat->clock = err; |
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} else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) { |
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debug("omap serial failed to get clock\n"); |
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return err; |
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} |
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if (!plat->clock) |
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plat->clock = dev_read_u32_default(dev, "clock-frequency", |
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CONFIG_SYS_NS16550_CLK); |
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if (!plat->clock) { |
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debug("omap serial clock not defined\n"); |
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return -EINVAL; |
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} |
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plat->fcr = UART_FCR_DEFVAL; |
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return 0; |
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} |
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static const struct udevice_id omap_serial_ids[] = { |
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{ .compatible = "ti,omap2-uart", }, |
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{ .compatible = "ti,omap3-uart", }, |
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{ .compatible = "ti,omap4-uart", }, |
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{ .compatible = "ti,am3352-uart", }, |
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{ .compatible = "ti,am4372-uart", }, |
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{ .compatible = "ti,dra742-uart", }, |
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{} |
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}; |
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#endif /* OF_CONTROL && !OF_PLATDATA */ |
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#if CONFIG_IS_ENABLED(SERIAL_PRESENT) |
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U_BOOT_DRIVER(omap_serial) = { |
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.name = "omap_serial", |
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.id = UCLASS_SERIAL, |
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#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) |
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.of_match = omap_serial_ids, |
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.ofdata_to_platdata = omap_serial_ofdata_to_platdata, |
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.platdata_auto_alloc_size = sizeof(struct ns16550_platdata), |
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#endif |
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.priv_auto_alloc_size = sizeof(struct NS16550), |
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.probe = ns16550_serial_probe, |
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.ops = &ns16550_serial_ops, |
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.flags = DM_FLAG_PRE_RELOC, |
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}; |
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#endif |
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#endif /* DM_SERIAL */ |
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