mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-16 16:16:16 +09:00
caa4daa2ae
We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
172 lines
4.4 KiB
C
172 lines
4.4 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 - 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 <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 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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#ifndef CONFIG_SYS_NS16550_IER
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#define CONFIG_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_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->plat;
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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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{ .compatible = "ti,am654-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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.plat_auto = sizeof(struct ns16550_platdata),
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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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