1/*-
2 * Copyright (c) 2013 Ian Lepore
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "opt_platform.h"
28
29#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2013 Ian Lepore
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "opt_platform.h"
28
29#include <sys/cdefs.h>
|
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/bus.h>
35#include <sys/conf.h>
36#include <sys/kernel.h>
37#include <sys/sysctl.h>
38#include <machine/bus.h>
39
40#include <arm/ti/ti_prcm.h>
41
42#include <dev/fdt/fdt_common.h>
43#include <dev/ofw/ofw_bus.h>
44#include <dev/ofw/ofw_bus_subr.h>
45
46#include <dev/uart/uart.h>
47#include <dev/uart/uart_cpu.h>
48#include <dev/uart/uart_cpu_fdt.h>
49#include <dev/uart/uart_bus.h>
50#include <dev/uart/uart_dev_ns8250.h>
51
52#include "uart_if.h"
53
54/*
55 * High-level UART interface.
56 */
57struct ti8250_softc {
58 struct ns8250_softc ns8250_base;
59 /*uint32_t mystuff;*/
60};
61
62#define MDR1_REG 8
63#define MDR1_MODE_UART 0
64#define MDR1_MODE_DISABLE 7
65#define SYSCC_REG 15
66#define SYSCC_SOFTRESET (1 << 1)
67#define SYSS_REG 16
68#define SYSS_STATUS_RESETDONE (1 << 0)
69
70static int
71ti8250_bus_probe(struct uart_softc *sc)
72{
73 int status;
74 int devid;
75 clk_ident_t clkid;
76 pcell_t prop;
77 phandle_t node;
78
79 /*
80 * Get the device id from FDT. If it's not there we can't turn on the
81 * right clocks, so bail, unless we're doing unit 0. We assume that's
82 * the serial console, whose clock isn't controllable anyway, and we
83 * sure don't want to break the console because of a config error.
84 */
85 node = ofw_bus_get_node(sc->sc_dev);
86 if ((OF_getprop(node, "uart-device-id", &prop, sizeof(prop))) <= 0) {
87 device_printf(sc->sc_dev,
88 "missing uart-device-id attribute in FDT\n");
89 if (device_get_unit(sc->sc_dev) != 0)
90 return (ENXIO);
91 devid = 0;
92 } else
93 devid = fdt32_to_cpu(prop);
94
95 /* Enable clocks for this device. We can't continue if that fails. */
96 clkid = UART0_CLK + devid;
97 if ((status = ti_prcm_clk_enable(clkid)) != 0)
98 return (status);
99
100 /*
101 * Set the hardware to disabled mode, do a full device reset, then set
102 * it to uart mode. Most devices will be reset-and-disabled already,
103 * but you never know what a bootloader might have done.
104 */
105 uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_DISABLE);
106 uart_setreg(&sc->sc_bas, SYSCC_REG, SYSCC_SOFTRESET);
107 while (uart_getreg(&sc->sc_bas, SYSS_REG) & SYSS_STATUS_RESETDONE)
108 continue;
109 uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_UART);
110
111 status = ns8250_bus_probe(sc);
112 if (status == 0)
113 device_set_desc(sc->sc_dev, "TI UART (16550 compatible)");
114
115 return (status);
116}
117
118static kobj_method_t ti8250_methods[] = {
119 KOBJMETHOD(uart_probe, ti8250_bus_probe),
120
121 KOBJMETHOD(uart_attach, ns8250_bus_attach),
122 KOBJMETHOD(uart_detach, ns8250_bus_detach),
123 KOBJMETHOD(uart_flush, ns8250_bus_flush),
124 KOBJMETHOD(uart_getsig, ns8250_bus_getsig),
125 KOBJMETHOD(uart_ioctl, ns8250_bus_ioctl),
126 KOBJMETHOD(uart_ipend, ns8250_bus_ipend),
127 KOBJMETHOD(uart_param, ns8250_bus_param),
128 KOBJMETHOD(uart_receive, ns8250_bus_receive),
129 KOBJMETHOD(uart_setsig, ns8250_bus_setsig),
130 KOBJMETHOD(uart_transmit, ns8250_bus_transmit),
131 KOBJMETHOD_END
132};
133
134static struct uart_class uart_ti8250_class = {
135 "ti8250",
136 ti8250_methods,
137 sizeof(struct ti8250_softc),
138 .uc_ops = &uart_ns8250_ops,
139 .uc_range = 0x88,
| 31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/bus.h>
35#include <sys/conf.h>
36#include <sys/kernel.h>
37#include <sys/sysctl.h>
38#include <machine/bus.h>
39
40#include <arm/ti/ti_prcm.h>
41
42#include <dev/fdt/fdt_common.h>
43#include <dev/ofw/ofw_bus.h>
44#include <dev/ofw/ofw_bus_subr.h>
45
46#include <dev/uart/uart.h>
47#include <dev/uart/uart_cpu.h>
48#include <dev/uart/uart_cpu_fdt.h>
49#include <dev/uart/uart_bus.h>
50#include <dev/uart/uart_dev_ns8250.h>
51
52#include "uart_if.h"
53
54/*
55 * High-level UART interface.
56 */
57struct ti8250_softc {
58 struct ns8250_softc ns8250_base;
59 /*uint32_t mystuff;*/
60};
61
62#define MDR1_REG 8
63#define MDR1_MODE_UART 0
64#define MDR1_MODE_DISABLE 7
65#define SYSCC_REG 15
66#define SYSCC_SOFTRESET (1 << 1)
67#define SYSS_REG 16
68#define SYSS_STATUS_RESETDONE (1 << 0)
69
70static int
71ti8250_bus_probe(struct uart_softc *sc)
72{
73 int status;
74 int devid;
75 clk_ident_t clkid;
76 pcell_t prop;
77 phandle_t node;
78
79 /*
80 * Get the device id from FDT. If it's not there we can't turn on the
81 * right clocks, so bail, unless we're doing unit 0. We assume that's
82 * the serial console, whose clock isn't controllable anyway, and we
83 * sure don't want to break the console because of a config error.
84 */
85 node = ofw_bus_get_node(sc->sc_dev);
86 if ((OF_getprop(node, "uart-device-id", &prop, sizeof(prop))) <= 0) {
87 device_printf(sc->sc_dev,
88 "missing uart-device-id attribute in FDT\n");
89 if (device_get_unit(sc->sc_dev) != 0)
90 return (ENXIO);
91 devid = 0;
92 } else
93 devid = fdt32_to_cpu(prop);
94
95 /* Enable clocks for this device. We can't continue if that fails. */
96 clkid = UART0_CLK + devid;
97 if ((status = ti_prcm_clk_enable(clkid)) != 0)
98 return (status);
99
100 /*
101 * Set the hardware to disabled mode, do a full device reset, then set
102 * it to uart mode. Most devices will be reset-and-disabled already,
103 * but you never know what a bootloader might have done.
104 */
105 uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_DISABLE);
106 uart_setreg(&sc->sc_bas, SYSCC_REG, SYSCC_SOFTRESET);
107 while (uart_getreg(&sc->sc_bas, SYSS_REG) & SYSS_STATUS_RESETDONE)
108 continue;
109 uart_setreg(&sc->sc_bas, MDR1_REG, MDR1_MODE_UART);
110
111 status = ns8250_bus_probe(sc);
112 if (status == 0)
113 device_set_desc(sc->sc_dev, "TI UART (16550 compatible)");
114
115 return (status);
116}
117
118static kobj_method_t ti8250_methods[] = {
119 KOBJMETHOD(uart_probe, ti8250_bus_probe),
120
121 KOBJMETHOD(uart_attach, ns8250_bus_attach),
122 KOBJMETHOD(uart_detach, ns8250_bus_detach),
123 KOBJMETHOD(uart_flush, ns8250_bus_flush),
124 KOBJMETHOD(uart_getsig, ns8250_bus_getsig),
125 KOBJMETHOD(uart_ioctl, ns8250_bus_ioctl),
126 KOBJMETHOD(uart_ipend, ns8250_bus_ipend),
127 KOBJMETHOD(uart_param, ns8250_bus_param),
128 KOBJMETHOD(uart_receive, ns8250_bus_receive),
129 KOBJMETHOD(uart_setsig, ns8250_bus_setsig),
130 KOBJMETHOD(uart_transmit, ns8250_bus_transmit),
131 KOBJMETHOD_END
132};
133
134static struct uart_class uart_ti8250_class = {
135 "ti8250",
136 ti8250_methods,
137 sizeof(struct ti8250_softc),
138 .uc_ops = &uart_ns8250_ops,
139 .uc_range = 0x88,
|