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Subject[PATCH v3 06/12] macintosh/via-pmu: Add support for m68k PowerBooks
Date
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>
---
drivers/macintosh/Kconfig | 2 +-
drivers/macintosh/via-pmu.c | 101 +++++++++++++++++++++++++++++++++++++++-----
2 files changed, 91 insertions(+), 12 deletions(-)

diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
index 97a420c11eed..9c6452b38c36 100644
--- a/drivers/macintosh/Kconfig
+++ b/drivers/macintosh/Kconfig
@@ -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
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 2e09137410f6..22cb7d94e3ce 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -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;

@@ -587,6 +636,10 @@ 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;
}

@@ -625,6 +678,7 @@ 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
@@ -706,6 +760,7 @@ 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);
}
@@ -1393,6 +1448,7 @@ pmu_handle_data(unsigned char *data, int len)
}
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) {
@@ -1400,6 +1456,7 @@ pmu_handle_data(unsigned char *data, int len)
return;
}
}
+#endif /* CONFIG_XMON */
#ifdef CONFIG_ADB
/*
* XXX On the [23]400 the PMU gives us an up
@@ -1567,7 +1624,25 @@ 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;
@@ -1577,7 +1652,6 @@ 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]++;
@@ -1587,6 +1661,9 @@ via_pmu_interrupt(int irq, void *arg)
if (req)
break;
}
+#ifndef CONFIG_PPC_PMAC
+ break;
+#endif
}

recheck:
@@ -1653,7 +1730,7 @@ pmu_unlock(void)
}


-static irqreturn_t
+static __maybe_unused irqreturn_t
gpio1_interrupt(int irq, void *arg)
{
unsigned long flags;
@@ -2287,6 +2364,7 @@ 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;
@@ -2296,6 +2374,7 @@ 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 */
--
2.16.4
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