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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | // SPDX-License-Identifier: GPL-2.0+ /* * Texas Instruments' OMAP serial driver * * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ * Lokesh Vutla <lokeshvutla@ti.com> */ #include <common.h> #include <dm.h> #include <dt-structs.h> #include <log.h> #include <ns16550.h> #include <serial.h> #include <clk.h> #include <linux/err.h> #ifndef CONFIG_SYS_NS16550_CLK #define CONFIG_SYS_NS16550_CLK 0 #endif #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->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; } 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, #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 */ |