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macintosh/via-pmu: Add support for m68k PowerBooks 

Put #ifdefs around the Open Firmware, xmon, interrupt dispatch,
battery and suspend code. Add the necessary interrupt handling to
support m68k PowerBooks.

The pmu_kind value is available to userspace using the
PMU_IOC_GET_MODEL ioctl. It is not clear yet what hardware classes
are be needed to describe m68k PowerBook models, so pmu_kind is given
the provisional value PMU_UNKNOWN.

To find out about the hardware, user programs can use /proc/bootinfo
or /proc/hardware, or send the PMU_GET_VERSION command using /dev/adb.

Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Finn Thain 2018-07-02 04:21:19 -04:00 committed by Michael Ellerman
parent c70c35da52
commit c16a85a5aa
2 changed files with 91 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/macintosh/Kconfig
View File

@ -65,7 +65,7 @@ config ADB_CUDA
If unsure say Y.
config ADB_PMU
bool "Support for PMU based PowerMacs"
bool "Support for PMU based PowerMacs and PowerBooks"
depends on PPC_PMAC
help
On PowerBooks, iBooks, and recent iMacs and Power Macintoshes, the

101
drivers/macintosh/via-pmu.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Device driver for the via-pmu on Apple Powermacs.
* Device driver for the PMU in Apple PowerBooks and PowerMacs.
*
* The VIA (versatile interface adapter) interfaces to the PMU,
* a 6805 microprocessor core whose primary function is to control
@ -49,20 +49,26 @@
#include <linux/compat.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <asm/prom.h>
#include <linux/uaccess.h>
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/sections.h>
#include <asm/irq.h>
#ifdef CONFIG_PPC_PMAC
#include <asm/pmac_feature.h>
#include <asm/pmac_pfunc.h>
#include <asm/pmac_low_i2c.h>
#include <linux/uaccess.h>
#include <asm/prom.h>
#include <asm/mmu_context.h>
#include <asm/cputable.h>
#include <asm/time.h>
#include <asm/backlight.h>
#else
#include <asm/macintosh.h>
#include <asm/macints.h>
#include <asm/mac_via.h>
#endif
#include "via-pmu-event.h"
@ -97,8 +103,13 @@ static DEFINE_MUTEX(pmu_info_proc_mutex);
#define ANH (15*RS) /* A-side data, no handshake */
/* Bits in B data register: both active low */
#ifdef CONFIG_PPC_PMAC
#define TACK 0x08 /* Transfer acknowledge (input) */
#define TREQ 0x10 /* Transfer request (output) */
#else
#define TACK 0x02
#define TREQ 0x04
#endif
/* Bits in ACR */
#define SR_CTRL 0x1c /* Shift register control bits */
@ -140,13 +151,15 @@ static int data_index;
static int data_len;
static volatile int adb_int_pending;
static volatile int disable_poll;
static struct device_node *vias;
static int pmu_kind = PMU_UNKNOWN;
static int pmu_fully_inited;
static int pmu_has_adb;
#ifdef CONFIG_PPC_PMAC
static volatile unsigned char __iomem *via1;
static volatile unsigned char __iomem *via2;
static struct device_node *vias;
static struct device_node *gpio_node;
#endif
static unsigned char __iomem *gpio_reg;
static int gpio_irq = 0;
static int gpio_irq_enabled = -1;
@ -273,6 +286,7 @@ static char *pbook_type[] = {
int __init find_via_pmu(void)
{
#ifdef CONFIG_PPC_PMAC
u64 taddr;
const u32 *reg;
@ -355,9 +369,6 @@ int __init find_via_pmu(void)
if (!init_pmu())
goto fail_init;
printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
sys_ctrler = SYS_CTRLER_PMU;
return 1;
@ -373,6 +384,30 @@ int __init find_via_pmu(void)
vias = NULL;
pmu_state = uninitialized;
return 0;
#else
if (macintosh_config->adb_type != MAC_ADB_PB2)
return 0;
pmu_kind = PMU_UNKNOWN;
spin_lock_init(&pmu_lock);
pmu_has_adb = 1;
pmu_intr_mask = PMU_INT_PCEJECT |
PMU_INT_SNDBRT |
PMU_INT_ADB |
PMU_INT_TICK;
pmu_state = idle;
if (!init_pmu()) {
pmu_state = uninitialized;
return 0;
}
return 1;
#endif /* !CONFIG_PPC_PMAC */
}
#ifdef CONFIG_ADB
@ -396,13 +431,14 @@ static int pmu_init(void)
*/
static int __init via_pmu_start(void)
{
unsigned int irq;
unsigned int __maybe_unused irq;
if (pmu_state == uninitialized)
return -ENODEV;
batt_req.complete = 1;
#ifdef CONFIG_PPC_PMAC
irq = irq_of_parse_and_map(vias, 0);
if (!irq) {
printk(KERN_ERR "via-pmu: can't map interrupt\n");
@ -439,6 +475,19 @@ static int __init via_pmu_start(void)
/* Enable interrupts */
out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
#else
if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
"VIA-PMU-SR", NULL)) {
pr_err("%s: couldn't get SR irq\n", __func__);
return -ENODEV;
}
if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
"VIA-PMU-CL", NULL)) {
pr_err("%s: couldn't get CL irq\n", __func__);
free_irq(IRQ_MAC_ADB_SR, NULL);
return -ENODEV;
}
#endif /* !CONFIG_PPC_PMAC */
pmu_fully_inited = 1;
@ -589,6 +638,10 @@ init_pmu(void)
option_server_mode ? "enabled" : "disabled");
}
}
printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
return 1;
}
@ -627,6 +680,7 @@ static void pmu_set_server_mode(int server_mode)
static void
done_battery_state_ohare(struct adb_request* req)
{
#ifdef CONFIG_PPC_PMAC
/* format:
* [0] : flags
* 0x01 : AC indicator
@ -708,6 +762,7 @@ done_battery_state_ohare(struct adb_request* req)
pmu_batteries[pmu_cur_battery].amperage = amperage;
pmu_batteries[pmu_cur_battery].voltage = voltage;
pmu_batteries[pmu_cur_battery].time_remaining = time;
#endif /* CONFIG_PPC_PMAC */
clear_bit(0, &async_req_locks);
}
@ -1356,6 +1411,7 @@ next:
}
pmu_done(req);
} else {
#ifdef CONFIG_XMON
if (len == 4 && data[1] == 0x2c) {
extern int xmon_wants_key, xmon_adb_keycode;
if (xmon_wants_key) {
@ -1363,6 +1419,7 @@ next:
return;
}
}
#endif /* CONFIG_XMON */
#ifdef CONFIG_ADB
/*
* XXX On the [23]400 the PMU gives us an up
@ -1530,7 +1587,25 @@ via_pmu_interrupt(int irq, void *arg)
++disable_poll;
for (;;) {
intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
/* On 68k Macs, VIA interrupts are dispatched individually.
* Unless we are polling, the relevant IRQ flag has already
* been cleared.
*/
intr = 0;
if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
out_8(&via1[IFR], intr);
}
#ifndef CONFIG_PPC_PMAC
switch (irq) {
case IRQ_MAC_ADB_CL:
intr = CB1_INT;
break;
case IRQ_MAC_ADB_SR:
intr = SR_INT;
break;
}
#endif
if (intr == 0)
break;
handled = 1;
@ -1540,7 +1615,6 @@ via_pmu_interrupt(int irq, void *arg)
intr, in_8(&via1[IER]), pmu_state);
break;
}
out_8(&via1[IFR], intr);
if (intr & CB1_INT) {
adb_int_pending = 1;
pmu_irq_stats[0]++;
@ -1550,6 +1624,9 @@ via_pmu_interrupt(int irq, void *arg)
if (req)
break;
}
#ifndef CONFIG_PPC_PMAC
break;
#endif
}
recheck:
@ -1616,7 +1693,7 @@ pmu_unlock(void)
}
static irqreturn_t
static __maybe_unused irqreturn_t
gpio1_interrupt(int irq, void *arg)
{
unsigned long flags;
@ -2250,6 +2327,7 @@ static int pmu_ioctl(struct file *filp,
int error = -EINVAL;
switch (cmd) {
#ifdef CONFIG_PPC_PMAC
case PMU_IOC_SLEEP:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@ -2259,6 +2337,7 @@ static int pmu_ioctl(struct file *filp,
return put_user(0, argp);
else
return put_user(1, argp);
#endif
#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
/* Compatibility ioctl's for backlight */