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https://source.denx.de/u-boot/u-boot.git
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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
172 lines
4.2 KiB
C
172 lines
4.2 KiB
C
// 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 - https://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 <dm.h>
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#include <dt-structs.h>
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#include <log.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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#include <linux/err.h>
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#ifndef CFG_SYS_NS16550_CLK
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#define CFG_SYS_NS16550_CLK 0
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#endif
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#ifdef CONFIG_DEBUG_UART_OMAP
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#ifndef CFG_SYS_NS16550_IER
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#define CFG_SYS_NS16550_IER 0x00
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#endif
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#define UART_MCRVAL 0x00
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#define UART_LCRVAL UART_LCR_8N1
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static inline void serial_out_shift(void *addr, int shift, int value)
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{
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#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
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outb(value, (ulong)addr);
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#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
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out_le32(addr, value);
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#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
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out_be32(addr, value);
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#elif defined(CONFIG_SYS_NS16550_MEM32)
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writel(value, addr);
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#elif defined(CONFIG_SYS_BIG_ENDIAN)
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writeb(value, addr + (1 << shift) - 1);
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#else
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writeb(value, addr);
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#endif
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}
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static inline int serial_in_shift(void *addr, int shift)
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{
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#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
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return inb((ulong)addr);
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#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
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return in_le32(addr);
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#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
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return in_be32(addr);
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#elif defined(CONFIG_SYS_NS16550_MEM32)
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return readl(addr);
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#elif defined(CONFIG_SYS_BIG_ENDIAN)
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return readb(addr + (1 << shift) - 1);
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#else
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return readb(addr);
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#endif
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}
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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_VAL(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, CFG_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_VAL(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_REAL)
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static int omap_serial_of_to_plat(struct udevice *dev)
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{
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struct ns16550_plat *plat = dev_get_plat(dev);
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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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CFG_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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{ .compatible = "ti,am654-uart", },
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{}
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};
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#endif /* OF_REAL */
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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_REAL)
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.of_match = omap_serial_ids,
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.of_to_plat = omap_serial_of_to_plat,
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.plat_auto = sizeof(struct ns16550_plat),
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#endif
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.priv_auto = sizeof(struct ns16550),
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.probe = ns16550_serial_probe,
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.ops = &ns16550_serial_ops,
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#if !CONFIG_IS_ENABLED(OF_CONTROL)
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.flags = DM_FLAG_PRE_RELOC,
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#endif
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};
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#endif
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#endif /* DM_SERIAL */
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