freebsd-dev/sys/powerpc/powermac/atibl.c
Pawel Biernacki 7029da5c36 Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marked).
Use it in preparation for a general review of all nodes.

This is non-functional change that adds annotations to SYSCTL_NODE and
SYSCTL_PROC nodes using one of the soon-to-be-required flags.

Mark all obvious cases as MPSAFE.  All entries that haven't been marked
as MPSAFE before are by default marked as NEEDGIANT

Approved by:	kib (mentor, blanket)
Commented by:	kib, gallatin, melifaro
Differential Revision:	https://reviews.freebsd.org/D23718
2020-02-26 14:26:36 +00:00

324 lines
9.1 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Justin Hibbits
* All rights reserved.
*
* 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 ``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 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <dev/ofw/openfirm.h>
#include <dev/pci/pcivar.h>
#ifndef PCI_VENDOR_ID_ATI
#define PCI_VENDOR_ID_ATI 0x1002
#endif
/* From the xf86-video-ati driver's radeon_reg.h */
#define RADEON_LVDS_GEN_CNTL 0x02d0
#define RADEON_LVDS_ON (1 << 0)
#define RADEON_LVDS_DISPLAY_DIS (1 << 1)
#define RADEON_LVDS_PANEL_TYPE (1 << 2)
#define RADEON_LVDS_PANEL_FORMAT (1 << 3)
#define RADEON_LVDS_RST_FM (1 << 6)
#define RADEON_LVDS_EN (1 << 7)
#define RADEON_LVDS_BL_MOD_LEVEL_SHIFT 8
#define RADEON_LVDS_BL_MOD_LEVEL_MASK (0xff << 8)
#define RADEON_LVDS_BL_MOD_EN (1 << 16)
#define RADEON_LVDS_DIGON (1 << 18)
#define RADEON_LVDS_BLON (1 << 19)
#define RADEON_LVDS_PLL_CNTL 0x02d4
#define RADEON_LVDS_PLL_EN (1 << 16)
#define RADEON_LVDS_PLL_RESET (1 << 17)
#define RADEON_PIXCLKS_CNTL 0x002d
#define RADEON_PIXCLK_LVDS_ALWAYS_ONb (1 << 14)
#define RADEON_DISP_PWR_MAN 0x0d08
#define RADEON_AUTO_PWRUP_EN (1 << 26)
#define RADEON_CLOCK_CNTL_DATA 0x000c
#define RADEON_CLOCK_CNTL_INDEX 0x0008
#define RADEON_PLL_WR_EN (1 << 7)
#define RADEON_CRTC_GEN_CNTL 0x0050
struct atibl_softc {
struct resource *sc_memr;
int sc_level;
};
static void atibl_identify(driver_t *driver, device_t parent);
static int atibl_probe(device_t dev);
static int atibl_attach(device_t dev);
static int atibl_setlevel(struct atibl_softc *sc, int newlevel);
static int atibl_getlevel(struct atibl_softc *sc);
static int atibl_resume(device_t dev);
static int atibl_suspend(device_t dev);
static int atibl_sysctl(SYSCTL_HANDLER_ARGS);
static device_method_t atibl_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, atibl_identify),
DEVMETHOD(device_probe, atibl_probe),
DEVMETHOD(device_attach, atibl_attach),
DEVMETHOD(device_suspend, atibl_suspend),
DEVMETHOD(device_resume, atibl_resume),
{0, 0},
};
static driver_t atibl_driver = {
"backlight",
atibl_methods,
sizeof(struct atibl_softc)
};
static devclass_t atibl_devclass;
DRIVER_MODULE(atibl, vgapci, atibl_driver, atibl_devclass, 0, 0);
static void
atibl_identify(driver_t *driver, device_t parent)
{
if (OF_finddevice("mac-io/backlight") == -1)
return;
if (device_find_child(parent, "backlight", -1) == NULL)
device_add_child(parent, "backlight", -1);
}
static int
atibl_probe(device_t dev)
{
char control[8];
phandle_t handle;
handle = OF_finddevice("mac-io/backlight");
if (handle == -1)
return (ENXIO);
if (OF_getprop(handle, "backlight-control", &control, sizeof(control)) < 0)
return (ENXIO);
if (strcmp(control, "ati") != 0 &&
(strcmp(control, "mnca") != 0 ||
pci_get_vendor(device_get_parent(dev)) != 0x1002))
return (ENXIO);
device_set_desc(dev, "PowerBook backlight for ATI graphics");
return (0);
}
static int
atibl_attach(device_t dev)
{
struct atibl_softc *sc;
struct sysctl_ctx_list *ctx;
struct sysctl_oid *tree;
int rid;
sc = device_get_softc(dev);
rid = 0x18; /* BAR[2], for the MMIO register */
sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE | RF_SHAREABLE);
if (sc->sc_memr == NULL) {
device_printf(dev, "Could not alloc mem resource!\n");
return (ENXIO);
}
ctx = device_get_sysctl_ctx(dev);
tree = device_get_sysctl_tree(dev);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"level", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 0,
atibl_sysctl, "I", "Backlight level (0-100)");
return (0);
}
static uint32_t __inline
atibl_pll_rreg(struct atibl_softc *sc, uint32_t reg)
{
uint32_t data, save, tmp;
bus_write_1(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX, (reg & 0x3f));
(void)bus_read_4(sc->sc_memr, RADEON_CLOCK_CNTL_DATA);
(void)bus_read_4(sc->sc_memr, RADEON_CRTC_GEN_CNTL);
data = bus_read_4(sc->sc_memr, RADEON_CLOCK_CNTL_DATA);
/* Only necessary on R300, but won't hurt others. */
save = bus_read_4(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX);
tmp = save & (~0x3f | RADEON_PLL_WR_EN);
bus_write_4(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX, tmp);
tmp = bus_read_4(sc->sc_memr, RADEON_CLOCK_CNTL_DATA);
bus_write_4(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX, save);
return data;
}
static void __inline
atibl_pll_wreg(struct atibl_softc *sc, uint32_t reg, uint32_t val)
{
uint32_t save, tmp;
bus_write_1(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX,
((reg & 0x3f) | RADEON_PLL_WR_EN));
(void)bus_read_4(sc->sc_memr, RADEON_CLOCK_CNTL_DATA);
(void)bus_read_4(sc->sc_memr, RADEON_CRTC_GEN_CNTL);
bus_write_4(sc->sc_memr, RADEON_CLOCK_CNTL_DATA, val);
DELAY(5000);
/* Only necessary on R300, but won't hurt others. */
save = bus_read_4(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX);
tmp = save & (~0x3f | RADEON_PLL_WR_EN);
bus_write_4(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX, tmp);
tmp = bus_read_4(sc->sc_memr, RADEON_CLOCK_CNTL_DATA);
bus_write_4(sc->sc_memr, RADEON_CLOCK_CNTL_INDEX, save);
}
static int
atibl_setlevel(struct atibl_softc *sc, int newlevel)
{
uint32_t lvds_gen_cntl;
uint32_t lvds_pll_cntl;
uint32_t pixclks_cntl;
uint32_t disp_pwr_reg;
if (newlevel > 100)
newlevel = 100;
if (newlevel < 0)
newlevel = 0;
lvds_gen_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL);
if (newlevel > 0) {
newlevel = (newlevel * 5) / 2 + 5;
disp_pwr_reg = bus_read_4(sc->sc_memr, RADEON_DISP_PWR_MAN);
disp_pwr_reg |= RADEON_AUTO_PWRUP_EN;
bus_write_4(sc->sc_memr, RADEON_DISP_PWR_MAN, disp_pwr_reg);
lvds_pll_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_PLL_CNTL);
lvds_pll_cntl |= RADEON_LVDS_PLL_EN;
bus_write_4(sc->sc_memr, RADEON_LVDS_PLL_CNTL, lvds_pll_cntl);
lvds_pll_cntl &= ~RADEON_LVDS_PLL_RESET;
bus_write_4(sc->sc_memr, RADEON_LVDS_PLL_CNTL, lvds_pll_cntl);
DELAY(1000);
lvds_gen_cntl &= ~(RADEON_LVDS_DISPLAY_DIS |
RADEON_LVDS_BL_MOD_LEVEL_MASK);
lvds_gen_cntl |= RADEON_LVDS_ON | RADEON_LVDS_EN |
RADEON_LVDS_DIGON | RADEON_LVDS_BLON;
lvds_gen_cntl |= (newlevel << RADEON_LVDS_BL_MOD_LEVEL_SHIFT) &
RADEON_LVDS_BL_MOD_LEVEL_MASK;
lvds_gen_cntl |= RADEON_LVDS_BL_MOD_EN;
DELAY(200000);
bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
} else {
pixclks_cntl = atibl_pll_rreg(sc, RADEON_PIXCLKS_CNTL);
atibl_pll_wreg(sc, RADEON_PIXCLKS_CNTL,
pixclks_cntl & ~RADEON_PIXCLK_LVDS_ALWAYS_ONb);
lvds_gen_cntl |= RADEON_LVDS_DISPLAY_DIS;
lvds_gen_cntl &= ~(RADEON_LVDS_BL_MOD_EN | RADEON_LVDS_BL_MOD_LEVEL_MASK);
bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
lvds_gen_cntl &= ~(RADEON_LVDS_ON | RADEON_LVDS_EN);
DELAY(200000);
bus_write_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
atibl_pll_wreg(sc, RADEON_PIXCLKS_CNTL, pixclks_cntl);
DELAY(200000);
}
return (0);
}
static int
atibl_getlevel(struct atibl_softc *sc)
{
uint32_t lvds_gen_cntl;
int level;
lvds_gen_cntl = bus_read_4(sc->sc_memr, RADEON_LVDS_GEN_CNTL);
level = ((lvds_gen_cntl & RADEON_LVDS_BL_MOD_LEVEL_MASK) >>
RADEON_LVDS_BL_MOD_LEVEL_SHIFT);
if (level != 0)
level = ((level - 5) * 2) / 5;
return (level);
}
static int
atibl_suspend(device_t dev)
{
struct atibl_softc *sc;
sc = device_get_softc(dev);
sc->sc_level = atibl_getlevel(sc);
atibl_setlevel(sc, 0);
return (0);
}
static int
atibl_resume(device_t dev)
{
struct atibl_softc *sc;
sc = device_get_softc(dev);
atibl_setlevel(sc, sc->sc_level);
return (0);
}
static int
atibl_sysctl(SYSCTL_HANDLER_ARGS)
{
struct atibl_softc *sc;
int newlevel, error;
sc = arg1;
newlevel = atibl_getlevel(sc);
error = sysctl_handle_int(oidp, &newlevel, 0, req);
if (error || !req->newptr)
return (error);
return (atibl_setlevel(sc, newlevel));
}