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9#include <common.h>
10#include <dm.h>
11#include <dt-structs.h>
12#include <log.h>
13#include <ns16550.h>
14#include <serial.h>
15#include <clk.h>
16#include <linux/err.h>
17
18#ifndef CONFIG_SYS_NS16550_CLK
19#define CONFIG_SYS_NS16550_CLK 0
20#endif
21
22#ifdef CONFIG_DEBUG_UART_OMAP
23
24#ifndef CONFIG_SYS_NS16550_IER
25#define CONFIG_SYS_NS16550_IER 0x00
26#endif
27
28#define UART_MCRVAL 0x00
29#define UART_LCRVAL UART_LCR_8N1
30
31static inline void serial_out_shift(void *addr, int shift, int value)
32{
33#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
34 outb(value, (ulong)addr);
35#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
36 out_le32(addr, value);
37#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
38 out_be32(addr, value);
39#elif defined(CONFIG_SYS_NS16550_MEM32)
40 writel(value, addr);
41#elif defined(CONFIG_SYS_BIG_ENDIAN)
42 writeb(value, addr + (1 << shift) - 1);
43#else
44 writeb(value, addr);
45#endif
46}
47
48static inline int serial_in_shift(void *addr, int shift)
49{
50#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
51 return inb((ulong)addr);
52#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_LITTLE_ENDIAN)
53 return in_le32(addr);
54#elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
55 return in_be32(addr);
56#elif defined(CONFIG_SYS_NS16550_MEM32)
57 return readl(addr);
58#elif defined(CONFIG_SYS_BIG_ENDIAN)
59 return readb(addr + (1 << shift) - 1);
60#else
61 return readb(addr);
62#endif
63}
64
65#include <debug_uart.h>
66
67static inline void _debug_uart_init(void)
68{
69 struct ns16550 *com_port = (struct ns16550 *)CONFIG_DEBUG_UART_BASE;
70 int baud_divisor;
71
72 baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
73 CONFIG_BAUDRATE);
74 serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
75 serial_dout(&com_port->mdr1, 0x7);
76 serial_dout(&com_port->mcr, UART_MCRVAL);
77 serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
78
79 serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
80 serial_dout(&com_port->dll, baud_divisor & 0xff);
81 serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
82 serial_dout(&com_port->lcr, UART_LCRVAL);
83 serial_dout(&com_port->mdr1, 0x0);
84}
85
86static inline void _debug_uart_putc(int ch)
87{
88 struct ns16550 *com_port = (struct ns16550 *)CONFIG_DEBUG_UART_BASE;
89
90 while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
91 ;
92 serial_dout(&com_port->thr, ch);
93}
94
95DEBUG_UART_FUNCS
96
97#endif
98
99#if CONFIG_IS_ENABLED(DM_SERIAL)
100
101#if CONFIG_IS_ENABLED(OF_REAL)
102static int omap_serial_of_to_plat(struct udevice *dev)
103{
104 struct ns16550_plat *plat = dev_get_plat(dev);
105 fdt_addr_t addr;
106 struct clk clk;
107 int err;
108
109
110 addr = dev_read_addr(dev);
111 if (addr == FDT_ADDR_T_NONE)
112 return -EINVAL;
113
114 plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE);
115
116 plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0);
117 plat->reg_shift = 2;
118
119 err = clk_get_by_index(dev, 0, &clk);
120 if (!err) {
121 err = clk_get_rate(&clk);
122 if (!IS_ERR_VALUE(err))
123 plat->clock = err;
124 } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) {
125 debug("omap serial failed to get clock\n");
126 return err;
127 }
128
129 if (!plat->clock)
130 plat->clock = dev_read_u32_default(dev, "clock-frequency",
131 CONFIG_SYS_NS16550_CLK);
132 if (!plat->clock) {
133 debug("omap serial clock not defined\n");
134 return -EINVAL;
135 }
136
137 plat->fcr = UART_FCR_DEFVAL;
138
139 return 0;
140}
141
142static const struct udevice_id omap_serial_ids[] = {
143 { .compatible = "ti,omap2-uart", },
144 { .compatible = "ti,omap3-uart", },
145 { .compatible = "ti,omap4-uart", },
146 { .compatible = "ti,am3352-uart", },
147 { .compatible = "ti,am4372-uart", },
148 { .compatible = "ti,dra742-uart", },
149 { .compatible = "ti,am654-uart", },
150 {}
151};
152#endif
153
154#if CONFIG_IS_ENABLED(SERIAL_PRESENT)
155U_BOOT_DRIVER(omap_serial) = {
156 .name = "omap_serial",
157 .id = UCLASS_SERIAL,
158#if CONFIG_IS_ENABLED(OF_REAL)
159 .of_match = omap_serial_ids,
160 .of_to_plat = omap_serial_of_to_plat,
161 .plat_auto = sizeof(struct ns16550_plat),
162#endif
163 .priv_auto = sizeof(struct ns16550),
164 .probe = ns16550_serial_probe,
165 .ops = &ns16550_serial_ops,
166#if !CONFIG_IS_ENABLED(OF_CONTROL)
167 .flags = DM_FLAG_PRE_RELOC,
168#endif
169};
170#endif
171#endif
172
