[PATCH v3 05/12] macintosh/via-pmu: Replace via pointer with via1 and via2 pointers

From: Finn Thain
Date: Wed Jun 13 2018 - 06:40:43 EST

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Previous message: Finn Thain: "[PATCH v3 06/12] macintosh/via-pmu: Add support for m68k PowerBooks"
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On most PowerPC Macs, the PMU driver uses the shift register and
IO port B from a single VIA chip.

On 68k and early PowerPC PowerBooks, the driver uses the shift register
from one VIA chip together with IO port B from another.

Replace via with via1 and via2 to accommodate this. For the
CONFIG_PPC_PMAC case, set via1 = via2 so there is no change.

Tested-by: Stan Johnson <userm57@xxxxxxxxx>
Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
---
drivers/macintosh/via-pmu.c | 142 +++++++++++++++++++++-----------------------
1 file changed, 69 insertions(+), 73 deletions(-)

diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index c4c324fb5fa6..2e09137410f6 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -76,7 +76,6 @@
#define BATTERY_POLLING_COUNT 2

static DEFINE_MUTEX(pmu_info_proc_mutex);
-static volatile unsigned char __iomem *via;

/* VIA registers - spaced 0x200 bytes apart */
#define RS 0x200 /* skip between registers */
@@ -145,6 +144,8 @@ static struct device_node *vias;
static int pmu_kind = PMU_UNKNOWN;
static int pmu_fully_inited;
static int pmu_has_adb;
+static volatile unsigned char __iomem *via1;
+static volatile unsigned char __iomem *via2;
static struct device_node *gpio_node;
static unsigned char __iomem *gpio_reg;
static int gpio_irq = 0;
@@ -340,14 +341,14 @@ int __init find_via_pmu(void)
} else
pmu_kind = PMU_UNKNOWN;

- via = ioremap(taddr, 0x2000);
- if (via == NULL) {
+ via1 = via2 = ioremap(taddr, 0x2000);
+ if (via1 == NULL) {
printk(KERN_ERR "via-pmu: Can't map address !\n");
goto fail_via_remap;
}

- out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
- out_8(&via[IFR], 0x7f); /* clear IFR */
+ out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */
+ out_8(&via1[IFR], 0x7f); /* clear IFR */

pmu_state = idle;

@@ -362,8 +363,8 @@ int __init find_via_pmu(void)
return 1;

fail_init:
- iounmap(via);
- via = NULL;
+ iounmap(via1);
+ via1 = via2 = NULL;
fail_via_remap:
iounmap(gpio_reg);
gpio_reg = NULL;
@@ -437,7 +438,7 @@ static int __init via_pmu_start(void)
}

/* Enable interrupts */
- out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
+ out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);

pmu_fully_inited = 1;

@@ -533,8 +534,8 @@ init_pmu(void)
struct adb_request req;

/* Negate TREQ. Set TACK to input and TREQ to output. */
- out_8(&via[B], in_8(&via[B]) | TREQ);
- out_8(&via[DIRB], (in_8(&via[DIRB]) | TREQ) & ~TACK);
+ out_8(&via2[B], in_8(&via2[B]) | TREQ);
+ out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);

pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
timeout = 100000;
@@ -1174,7 +1175,7 @@ wait_for_ack(void)
* reported
*/
int timeout = 4000;
- while ((in_8(&via[B]) & TACK) == 0) {
+ while ((in_8(&via2[B]) & TACK) == 0) {
if (--timeout < 0) {
printk(KERN_ERR "PMU not responding (!ack)\n");
return;
@@ -1188,23 +1189,19 @@ wait_for_ack(void)
static inline void
send_byte(int x)
{
- volatile unsigned char __iomem *v = via;
-
- out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
- out_8(&v[SR], x);
- out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
- (void)in_8(&v[B]);
+ out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
+ out_8(&via1[SR], x);
+ out_8(&via2[B], in_8(&via2[B]) & ~TREQ); /* assert TREQ */
+ (void)in_8(&via2[B]);
}

static inline void
recv_byte(void)
{
- volatile unsigned char __iomem *v = via;
-
- out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
- in_8(&v[SR]); /* resets SR */
- out_8(&v[B], in_8(&v[B]) & ~TREQ);
- (void)in_8(&v[B]);
+ out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
+ in_8(&via1[SR]); /* resets SR */
+ out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
+ (void)in_8(&via2[B]);
}

static inline void
@@ -1307,7 +1304,7 @@ pmu_suspend(void)
if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
if (gpio_irq >= 0)
disable_irq_nosync(gpio_irq);
- out_8(&via[IER], CB1_INT | IER_CLR);
+ out_8(&via1[IER], CB1_INT | IER_CLR);
spin_unlock_irqrestore(&pmu_lock, flags);
break;
}
@@ -1331,7 +1328,7 @@ pmu_resume(void)
adb_int_pending = 1;
if (gpio_irq >= 0)
enable_irq(gpio_irq);
- out_8(&via[IER], CB1_INT | IER_SET);
+ out_8(&via1[IER], CB1_INT | IER_SET);
spin_unlock_irqrestore(&pmu_lock, flags);
pmu_poll();
}
@@ -1456,20 +1453,20 @@ pmu_sr_intr(void)
struct adb_request *req;
int bite = 0;

- if (in_8(&via[B]) & TREQ) {
- printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via[B]));
+ if (in_8(&via2[B]) & TREQ) {
+ printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
return NULL;
}
/* The ack may not yet be low when we get the interrupt */
- while ((in_8(&via[B]) & TACK) != 0)
+ while ((in_8(&via2[B]) & TACK) != 0)
;

/* if reading grab the byte, and reset the interrupt */
if (pmu_state == reading || pmu_state == reading_intr)
- bite = in_8(&via[SR]);
+ bite = in_8(&via1[SR]);

/* reset TREQ and wait for TACK to go high */
- out_8(&via[B], in_8(&via[B]) | TREQ);
+ out_8(&via2[B], in_8(&via2[B]) | TREQ);
wait_for_ack();

switch (pmu_state) {
@@ -1570,17 +1567,17 @@ via_pmu_interrupt(int irq, void *arg)
++disable_poll;

for (;;) {
- intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
+ intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
if (intr == 0)
break;
handled = 1;
if (++nloop > 1000) {
printk(KERN_DEBUG "PMU: stuck in intr loop, "
"intr=%x, ier=%x pmu_state=%d\n",
- intr, in_8(&via[IER]), pmu_state);
+ intr, in_8(&via1[IER]), pmu_state);
break;
}
- out_8(&via[IFR], intr);
+ out_8(&via1[IFR], intr);
if (intr & CB1_INT) {
adb_int_pending = 1;
pmu_irq_stats[0]++;
@@ -1762,29 +1759,29 @@ static u32 save_via[8];
static void
save_via_state(void)
{
- save_via[0] = in_8(&via[ANH]);
- save_via[1] = in_8(&via[DIRA]);
- save_via[2] = in_8(&via[B]);
- save_via[3] = in_8(&via[DIRB]);
- save_via[4] = in_8(&via[PCR]);
- save_via[5] = in_8(&via[ACR]);
- save_via[6] = in_8(&via[T1CL]);
- save_via[7] = in_8(&via[T1CH]);
+ save_via[0] = in_8(&via1[ANH]);
+ save_via[1] = in_8(&via1[DIRA]);
+ save_via[2] = in_8(&via1[B]);
+ save_via[3] = in_8(&via1[DIRB]);
+ save_via[4] = in_8(&via1[PCR]);
+ save_via[5] = in_8(&via1[ACR]);
+ save_via[6] = in_8(&via1[T1CL]);
+ save_via[7] = in_8(&via1[T1CH]);
}
static void
restore_via_state(void)
{
- out_8(&via[ANH], save_via[0]);
- out_8(&via[DIRA], save_via[1]);
- out_8(&via[B], save_via[2]);
- out_8(&via[DIRB], save_via[3]);
- out_8(&via[PCR], save_via[4]);
- out_8(&via[ACR], save_via[5]);
- out_8(&via[T1CL], save_via[6]);
- out_8(&via[T1CH], save_via[7]);
- out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
- out_8(&via[IFR], 0x7f); /* clear IFR */
- out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
+ out_8(&via1[ANH], save_via[0]);
+ out_8(&via1[DIRA], save_via[1]);
+ out_8(&via1[B], save_via[2]);
+ out_8(&via1[DIRB], save_via[3]);
+ out_8(&via1[PCR], save_via[4]);
+ out_8(&via1[ACR], save_via[5]);
+ out_8(&via1[T1CL], save_via[6]);
+ out_8(&via1[T1CH], save_via[7]);
+ out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */
+ out_8(&via1[IFR], 0x7f); /* clear IFR */
+ out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
}

#define GRACKLE_PM (1<<7)
@@ -2426,33 +2423,33 @@ device_initcall(pmu_device_init);

#ifdef DEBUG_SLEEP
static inline void
-polled_handshake(volatile unsigned char __iomem *via)
+polled_handshake(void)
{
- via[B] &= ~TREQ; eieio();
- while ((via[B] & TACK) != 0)
+ via2[B] &= ~TREQ; eieio();
+ while ((via2[B] & TACK) != 0)
;
- via[B] |= TREQ; eieio();
- while ((via[B] & TACK) == 0)
+ via2[B] |= TREQ; eieio();
+ while ((via2[B] & TACK) == 0)
;
}

static inline void
-polled_send_byte(volatile unsigned char __iomem *via, int x)
+polled_send_byte(int x)
{
- via[ACR] |= SR_OUT | SR_EXT; eieio();
- via[SR] = x; eieio();
- polled_handshake(via);
+ via1[ACR] |= SR_OUT | SR_EXT; eieio();
+ via1[SR] = x; eieio();
+ polled_handshake();
}

static inline int
-polled_recv_byte(volatile unsigned char __iomem *via)
+polled_recv_byte(void)
{
int x;

- via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
- x = via[SR]; eieio();
- polled_handshake(via);
- x = via[SR]; eieio();
+ via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
+ x = via1[SR]; eieio();
+ polled_handshake();
+ x = via1[SR]; eieio();
return x;
}

@@ -2461,7 +2458,6 @@ pmu_polled_request(struct adb_request *req)
{
unsigned long flags;
int i, l, c;
- volatile unsigned char __iomem *v = via;

req->complete = 1;
c = req->data[0];
@@ -2473,21 +2469,21 @@ pmu_polled_request(struct adb_request *req)
while (pmu_state != idle)
pmu_poll();

- while ((via[B] & TACK) == 0)
+ while ((via2[B] & TACK) == 0)
;
- polled_send_byte(v, c);
+ polled_send_byte(c);
if (l < 0) {
l = req->nbytes - 1;
- polled_send_byte(v, l);
+ polled_send_byte(l);
}
for (i = 1; i <= l; ++i)
- polled_send_byte(v, req->data[i]);
+ polled_send_byte(req->data[i]);

l = pmu_data_len[c][1];
if (l < 0)
- l = polled_recv_byte(v);
+ l = polled_recv_byte();
for (i = 0; i < l; ++i)
- req->reply[i + req->reply_len] = polled_recv_byte(v);
+ req->reply[i + req->reply_len] = polled_recv_byte();

if (req->done)
(*req->done)(req);
--
2.16.4

Next message: Thomas Hellstrom: "Re: [PATCH 1/2] locking: Implement an algorithm choice for Wound-Wait mutexes"
Previous message: Finn Thain: "[PATCH v3 06/12] macintosh/via-pmu: Add support for m68k PowerBooks"
In reply to: Finn Thain: "[PATCH v3 06/12] macintosh/via-pmu: Add support for m68k PowerBooks"
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