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freebsd-dev/sys/dev/uart/uart_cpu_fdt.c

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Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
/*-
sys/dev: further adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
2017-11-27 14:52:40 +00:00
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
* Copyright (c) 2009-2010 The FreeBSD Foundation
*
* This software was developed by Semihalf under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
Arrange for uart_cpu_fdt's probe() routine to use the same table of compat strings as uart_bus_fdt's probe(). The bus code uses ofw_bus_search_compatible() and that's not an option in cpu (console) code -- it runs way before the ofw routines are usable. So the console probe has its own loop to search the table, but now at least there's only one table to be maintained when new devices are added.
2013-11-02 20:14:39 +00:00
#include "opt_platform.h"
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
Be a bit more flexible in how we find the console from the properties on /chosen, following the list of allowed console properties in ePAPR. Also do not require that stdin be defined and equal to stdout: stdin is nonstandard (for ePAPR) and console in an unexpected place is after all better than no console.
2013-10-26 18:25:55 +00:00
#include <sys/systm.h>
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
Fix build after r257111 by including headers with definition of pmap_kextract().
2013-10-26 03:22:57 +00:00
#include <vm/vm.h>
#include <vm/pmap.h>
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
#include <machine/bus.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/uart/uart.h>
#include <dev/uart/uart_bus.h>
#include <dev/uart/uart_cpu.h>
Define new linker set, UART_FDT_CLASS_AND_DEVICE, for registering full (class and device) FDT UART. Define second one, UART_FDT_CLASS, for UART class only. This paves the way for declaring uart_class data and ofw/fdt compat data with a uart implementation, rather than needing a big global table of compat data and weak-symbol declarations of every existing implementation. Differential Revision: https://reviews.freebsd.org/D1992 Submitted by: Michal Meloun
2015-03-07 15:18:57 +00:00
#include <dev/uart/uart_cpu_fdt.h>
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
/*
* UART console routines.
*/
bus_space_tag_t uart_bus_space_io;
bus_space_tag_t uart_bus_space_mem;
int
uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
{
Test UARTs physical address instead of virtual.
2013-10-25 11:44:39 +00:00
if (b1->bst != b2->bst)
return (0);
if (pmap_kextract(b1->bsh) == 0)
return (0);
if (pmap_kextract(b2->bsh) == 0)
return (0);
return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
}
int
uart_cpu_getdev(int devtype, struct uart_devinfo *di)
{
struct uart_class *class;
We will be switching to a new arm64 uart cpu driver that handles both FDT and ACPI. As such pull out what will be the common parts of the FDT cpu detection to a new function that can be shared between them. Reviewed by: manu Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7262
2016-07-20 17:19:47 +00:00
bus_space_tag_t bst;
bus_space_handle_t bsh;
Allow setting access-width for UART registers. This is required for FDT's standard "reg-io-width" property (similar to "reg-shift" property) found in many DTS files. This fixes operation on Altera Arria 10 SOC Development Kit, where standard ns8250 uart allows 4-byte access only. Reviewed by: kan, marcel Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D9785
2017-02-27 20:08:42 +00:00
u_int shift, iowidth, rclk;
We will be switching to a new arm64 uart cpu driver that handles both FDT and ACPI. As such pull out what will be the common parts of the FDT cpu detection to a new function that can be shared between them. Reviewed by: manu Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7262
2016-07-20 17:19:47 +00:00
int br, err;
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
Be a bit more flexible in how we find the console from the properties on /chosen, following the list of allowed console properties in ePAPR. Also do not require that stdin be defined and equal to stdout: stdin is nonstandard (for ePAPR) and console in an unexpected place is after all better than no console.
2013-10-26 18:25:55 +00:00
/* Allow overriding the FDT using the environment. */
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
class = &uart_ns8250_class;
err = uart_getenv(devtype, di, class);
if (!err)
return (0);
uart: allow UART_DEV_DBGPORT for fdt consoles Allow fdt devices to be used as debug ports for gdb(4). A debug console can be specified with the "freebsd,debug-path" property in the device tree's /chosen node, or using the environment variable hw.fdt.dbgport. The device should be specified by its name in the device tree, for example hw.fdt.dbgport="serial2". PR: 251053 Submitted by: Dmitry Salychev <dsl@mcusim.org> Submitted by: stevek (original patch, D5986) Reviewed by: andrew, mhorne Differential Revision: https://reviews.freebsd.org/D27422
2020-12-02 21:01:52 +00:00
err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk,
&shift, &iowidth, devtype);
We will be switching to a new arm64 uart cpu driver that handles both FDT and ACPI. As such pull out what will be the common parts of the FDT cpu detection to a new function that can be shared between them. Reviewed by: manu Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7262
2016-07-20 17:19:47 +00:00
if (err != 0)
return (err);
Add support for the uart classes to set their default register shift value. This is needed with the pl011 driver. Before this change it would default to a shift of 0, however the hardware places the registers at 4-byte addresses meaning the value should be 2. This patch fixes this for the pl011 when configured using the fdt. The other drivers have a default value of 0 to keep this a no-op. MFC after: 1 week
2015-04-11 17:16:23 +00:00
Define new linker set, UART_FDT_CLASS_AND_DEVICE, for registering full (class and device) FDT UART. Define second one, UART_FDT_CLASS, for UART class only. This paves the way for declaring uart_class data and ofw/fdt compat data with a uart implementation, rather than needing a big global table of compat data and weak-symbol declarations of every existing implementation. Differential Revision: https://reviews.freebsd.org/D1992 Submitted by: Michal Meloun
2015-03-07 15:18:57 +00:00
/*
* Finalize configuration.
*/
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
di->bas.chan = 0;
We will be switching to a new arm64 uart cpu driver that handles both FDT and ACPI. As such pull out what will be the common parts of the FDT cpu detection to a new function that can be shared between them. Reviewed by: manu Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7262
2016-07-20 17:19:47 +00:00
di->bas.regshft = shift;
Allow setting access-width for UART registers. This is required for FDT's standard "reg-io-width" property (similar to "reg-shift" property) found in many DTS files. This fixes operation on Altera Arria 10 SOC Development Kit, where standard ns8250 uart allows 4-byte access only. Reviewed by: kan, marcel Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D9785
2017-02-27 20:08:42 +00:00
di->bas.regiowidth = iowidth;
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
di->baudrate = br;
We will be switching to a new arm64 uart cpu driver that handles both FDT and ACPI. As such pull out what will be the common parts of the FDT cpu detection to a new function that can be shared between them. Reviewed by: manu Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7262
2016-07-20 17:19:47 +00:00
di->bas.rclk = rclk;
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
di->ops = uart_getops(class);
di->databits = 8;
di->stopbits = 1;
di->parity = UART_PARITY_NONE;
We will be switching to a new arm64 uart cpu driver that handles both FDT and ACPI. As such pull out what will be the common parts of the FDT cpu detection to a new function that can be shared between them. Reviewed by: manu Obtained from: ABT Systems Ltd MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D7262
2016-07-20 17:19:47 +00:00
di->bas.bst = bst;
di->bas.bsh = bsh;
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
Now that we have OF_decode_addr(), with proper MD implementations, to obtain the bus space tag and handle for a uart console, use the values returned by that routine to set the global uart_bus_space_mem, instead of assuming that there will be a global variable named fdtbus_bs_tag to set it from. Also, use OF_getencprop() instead calling fdt32_to_cpu() separately.
2016-02-23 02:57:45 +00:00
uart_bus_space_mem = di->bas.bst;
uart_bus_space_io = NULL;
return (err);
Add basic support for FDT to i386 & amd64. This change includes: 1. Common headers for fdt.h and ofw_machdep.h under x86/include with indirections under i386/include and amd64/include. 2. New modinfo for loader provided FDT blob. 3. Common x86_init_fdt() called from hammer_time() on amd64 and init386() on i386. 4. Split-off FDT specific low-level console functions from FDT bus methods for the uart(4) driver. The low-level console logic has been moved to uart_cpu_fdt.c and is used for arm, mips & powerpc only. The FDT bus methods are shared across all architectures. 5. Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the fdt_pic_table[] arrays. Both are empty right now. FDT addresses are I/O ports on x86. Since the core FDT code does not handle different address spaces, adding support for both I/O ports and memory addresses requires some thought and discussion. It may be better to use a compile-time option that controls this. Obtained from: Juniper Networks, Inc.
2013-05-21 03:05:49 +00:00
}
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