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-rw-r--r--drivers/cpuidle/cpuidle-powernv.c129
-rw-r--r--drivers/macintosh/Kconfig24
-rw-r--r--drivers/macintosh/Makefile1
-rw-r--r--drivers/macintosh/adb.c4
-rw-r--r--drivers/macintosh/via-cuda.c294
-rw-r--r--drivers/macintosh/via-maciisi.c677
-rw-r--r--drivers/misc/cxl/Makefile3
-rw-r--r--drivers/misc/cxl/api.c1
-rw-r--r--drivers/misc/cxl/cxl.h61
-rw-r--r--drivers/misc/cxl/main.c3
-rw-r--r--drivers/misc/cxl/pci.c5
-rw-r--r--drivers/misc/cxl/vphb.c51
12 files changed, 400 insertions, 853 deletions
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
index 0835a37a5f3a..370593006f5f 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++ b/drivers/cpuidle/cpuidle-powernv.c
@@ -19,7 +19,12 @@
#include <asm/firmware.h>
#include <asm/opal.h>
#include <asm/runlatch.h>
+#include <asm/cpuidle.h>
+/*
+ * Expose only those Hardware idle states via the cpuidle framework
+ * that have latency value below POWERNV_THRESHOLD_LATENCY_NS.
+ */
#define POWERNV_THRESHOLD_LATENCY_NS 200000
static struct cpuidle_driver powernv_idle_driver = {
@@ -30,7 +35,12 @@ static struct cpuidle_driver powernv_idle_driver = {
static int max_idle_state;
static struct cpuidle_state *cpuidle_state_table;
-static u64 stop_psscr_table[CPUIDLE_STATE_MAX];
+struct stop_psscr_table {
+ u64 val;
+ u64 mask;
+};
+
+static struct stop_psscr_table stop_psscr_table[CPUIDLE_STATE_MAX];
static u64 snooze_timeout;
static bool snooze_timeout_en;
@@ -102,7 +112,8 @@ static int stop_loop(struct cpuidle_device *dev,
int index)
{
ppc64_runlatch_off();
- power9_idle_stop(stop_psscr_table[index]);
+ power9_idle_stop(stop_psscr_table[index].val,
+ stop_psscr_table[index].mask);
ppc64_runlatch_on();
return index;
}
@@ -167,6 +178,25 @@ static int powernv_cpuidle_driver_init(void)
return 0;
}
+static inline void add_powernv_state(int index, const char *name,
+ unsigned int flags,
+ int (*idle_fn)(struct cpuidle_device *,
+ struct cpuidle_driver *,
+ int),
+ unsigned int target_residency,
+ unsigned int exit_latency,
+ u64 psscr_val, u64 psscr_mask)
+{
+ strlcpy(powernv_states[index].name, name, CPUIDLE_NAME_LEN);
+ strlcpy(powernv_states[index].desc, name, CPUIDLE_NAME_LEN);
+ powernv_states[index].flags = flags;
+ powernv_states[index].target_residency = target_residency;
+ powernv_states[index].exit_latency = exit_latency;
+ powernv_states[index].enter = idle_fn;
+ stop_psscr_table[index].val = psscr_val;
+ stop_psscr_table[index].mask = psscr_mask;
+}
+
static int powernv_add_idle_states(void)
{
struct device_node *power_mgt;
@@ -176,7 +206,9 @@ static int powernv_add_idle_states(void)
u32 residency_ns[CPUIDLE_STATE_MAX];
u32 flags[CPUIDLE_STATE_MAX];
u64 psscr_val[CPUIDLE_STATE_MAX];
+ u64 psscr_mask[CPUIDLE_STATE_MAX];
const char *names[CPUIDLE_STATE_MAX];
+ u32 has_stop_states = 0;
int i, rc;
/* Currently we have snooze statically defined */
@@ -223,19 +255,30 @@ static int powernv_add_idle_states(void)
/*
* If the idle states use stop instruction, probe for psscr values
- * which are necessary to specify required stop level.
+ * and psscr mask which are necessary to specify required stop level.
*/
- if (flags[0] & (OPAL_PM_STOP_INST_FAST | OPAL_PM_STOP_INST_DEEP))
+ has_stop_states = (flags[0] &
+ (OPAL_PM_STOP_INST_FAST | OPAL_PM_STOP_INST_DEEP));
+ if (has_stop_states) {
if (of_property_read_u64_array(power_mgt,
"ibm,cpu-idle-state-psscr", psscr_val, dt_idle_states)) {
- pr_warn("cpuidle-powernv: missing ibm,cpu-idle-states-psscr in DT\n");
+ pr_warn("cpuidle-powernv: missing ibm,cpu-idle-state-psscr in DT\n");
+ goto out;
+ }
+
+ if (of_property_read_u64_array(power_mgt,
+ "ibm,cpu-idle-state-psscr-mask",
+ psscr_mask, dt_idle_states)) {
+ pr_warn("cpuidle-powernv:Missing ibm,cpu-idle-state-psscr-mask in DT\n");
goto out;
}
+ }
rc = of_property_read_u32_array(power_mgt,
"ibm,cpu-idle-state-residency-ns", residency_ns, dt_idle_states);
for (i = 0; i < dt_idle_states; i++) {
+ unsigned int exit_latency, target_residency;
/*
* If an idle state has exit latency beyond
* POWERNV_THRESHOLD_LATENCY_NS then don't use it
@@ -243,28 +286,43 @@ static int powernv_add_idle_states(void)
*/
if (latency_ns[i] > POWERNV_THRESHOLD_LATENCY_NS)
continue;
+ /*
+ * Firmware passes residency and latency values in ns.
+ * cpuidle expects it in us.
+ */
+ exit_latency = latency_ns[i] / 1000;
+ if (!rc)
+ target_residency = residency_ns[i] / 1000;
+ else
+ target_residency = 0;
+
+ if (has_stop_states) {
+ int err = validate_psscr_val_mask(&psscr_val[i],
+ &psscr_mask[i],
+ flags[i]);
+ if (err) {
+ report_invalid_psscr_val(psscr_val[i], err);
+ continue;
+ }
+ }
/*
- * Cpuidle accepts exit_latency and target_residency in us.
- * Use default target_residency values if f/w does not expose it.
+ * For nap and fastsleep, use default target_residency
+ * values if f/w does not expose it.
*/
if (flags[i] & OPAL_PM_NAP_ENABLED) {
+ if (!rc)
+ target_residency = 100;
/* Add NAP state */
- strcpy(powernv_states[nr_idle_states].name, "Nap");
- strcpy(powernv_states[nr_idle_states].desc, "Nap");
- powernv_states[nr_idle_states].flags = 0;
- powernv_states[nr_idle_states].target_residency = 100;
- powernv_states[nr_idle_states].enter = nap_loop;
+ add_powernv_state(nr_idle_states, "Nap",
+ CPUIDLE_FLAG_NONE, nap_loop,
+ target_residency, exit_latency, 0, 0);
} else if ((flags[i] & OPAL_PM_STOP_INST_FAST) &&
!(flags[i] & OPAL_PM_TIMEBASE_STOP)) {
- strncpy(powernv_states[nr_idle_states].name,
- names[i], CPUIDLE_NAME_LEN);
- strncpy(powernv_states[nr_idle_states].desc,
- names[i], CPUIDLE_NAME_LEN);
- powernv_states[nr_idle_states].flags = 0;
-
- powernv_states[nr_idle_states].enter = stop_loop;
- stop_psscr_table[nr_idle_states] = psscr_val[i];
+ add_powernv_state(nr_idle_states, names[i],
+ CPUIDLE_FLAG_NONE, stop_loop,
+ target_residency, exit_latency,
+ psscr_val[i], psscr_mask[i]);
}
/*
@@ -274,32 +332,21 @@ static int powernv_add_idle_states(void)
#ifdef CONFIG_TICK_ONESHOT
if (flags[i] & OPAL_PM_SLEEP_ENABLED ||
flags[i] & OPAL_PM_SLEEP_ENABLED_ER1) {
+ if (!rc)
+ target_residency = 300000;
/* Add FASTSLEEP state */
- strcpy(powernv_states[nr_idle_states].name, "FastSleep");
- strcpy(powernv_states[nr_idle_states].desc, "FastSleep");
- powernv_states[nr_idle_states].flags = CPUIDLE_FLAG_TIMER_STOP;
- powernv_states[nr_idle_states].target_residency = 300000;
- powernv_states[nr_idle_states].enter = fastsleep_loop;
+ add_powernv_state(nr_idle_states, "FastSleep",
+ CPUIDLE_FLAG_TIMER_STOP,
+ fastsleep_loop,
+ target_residency, exit_latency, 0, 0);
} else if ((flags[i] & OPAL_PM_STOP_INST_DEEP) &&
(flags[i] & OPAL_PM_TIMEBASE_STOP)) {
- strncpy(powernv_states[nr_idle_states].name,
- names[i], CPUIDLE_NAME_LEN);
- strncpy(powernv_states[nr_idle_states].desc,
- names[i], CPUIDLE_NAME_LEN);
-
- powernv_states[nr_idle_states].flags = CPUIDLE_FLAG_TIMER_STOP;
- powernv_states[nr_idle_states].enter = stop_loop;
- stop_psscr_table[nr_idle_states] = psscr_val[i];
+ add_powernv_state(nr_idle_states, names[i],
+ CPUIDLE_FLAG_TIMER_STOP, stop_loop,
+ target_residency, exit_latency,
+ psscr_val[i], psscr_mask[i]);
}
#endif
- powernv_states[nr_idle_states].exit_latency =
- ((unsigned int)latency_ns[i]) / 1000;
-
- if (!rc) {
- powernv_states[nr_idle_states].target_residency =
- ((unsigned int)residency_ns[i]) / 1000;
- }
-
nr_idle_states++;
}
out:
diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
index 5d80810934df..97a420c11eed 100644
--- a/drivers/macintosh/Kconfig
+++ b/drivers/macintosh/Kconfig
@@ -30,14 +30,6 @@ config ADB_MACII
Quadra 610, Quadra 650, Quadra 700, Quadra 800, Centris 610 and
Centris 650.
-config ADB_MACIISI
- bool "Include Mac IIsi ADB driver"
- depends on ADB && MAC && BROKEN
- help
- Say Y here if want your kernel to support Macintosh systems that use
- the Mac IIsi style ADB. This includes the IIsi, IIvi, IIvx, Classic
- II, LC, LC II, LC III, Performa 460, and the Performa 600.
-
config ADB_IOP
bool "Include IOP (IIfx/Quadra 9x0) ADB driver"
depends on ADB && MAC
@@ -60,17 +52,15 @@ config ADB_PMU68K
# we want to change this to something like CONFIG_SYSCTRL_CUDA/PMU
config ADB_CUDA
- bool "Support for CUDA based Macs and PowerMacs"
+ bool "Support for Cuda/Egret based Macs and PowerMacs"
depends on (ADB || PPC_PMAC) && !PPC_PMAC64
help
- This provides support for CUDA based Macintosh and Power Macintosh
- systems. This includes many m68k based Macs (Color Classic, Mac TV,
- Performa 475, Performa 520, Performa 550, Performa 575,
- Performa 588, Quadra 605, Quadra 630, Quadra/Centris 660AV, and
- Quadra 840AV), most OldWorld PowerMacs, the first generation iMacs,
- the Blue&White G3 and the "Yikes" G4 (PCI Graphics). All later
- models should use CONFIG_ADB_PMU instead. It is safe to say Y here
- even if your machine doesn't have a CUDA.
+ This provides support for Cuda/Egret based Macintosh and
+ Power Macintosh systems. This includes most m68k based Macs,
+ most Old World PowerMacs, the first generation iMacs, the
+ Blue & White G3 and the "Yikes" G4 (PCI Graphics). All later
+ models should use CONFIG_ADB_PMU instead. It is safe to say Y
+ here even if your machine doesn't have a Cuda or Egret device.
If unsure say Y.
diff --git a/drivers/macintosh/Makefile b/drivers/macintosh/Makefile
index 383ba920085b..516eb65bcacc 100644
--- a/drivers/macintosh/Makefile
+++ b/drivers/macintosh/Makefile
@@ -20,7 +20,6 @@ obj-$(CONFIG_PMAC_SMU) += smu.o
obj-$(CONFIG_ADB) += adb.o
obj-$(CONFIG_ADB_MACII) += via-macii.o
-obj-$(CONFIG_ADB_MACIISI) += via-maciisi.o
obj-$(CONFIG_ADB_IOP) += adb-iop.o
obj-$(CONFIG_ADB_PMU68K) += via-pmu68k.o
obj-$(CONFIG_ADB_MACIO) += macio-adb.o
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 226179b975a0..152414e6378a 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -48,7 +48,6 @@
EXPORT_SYMBOL(adb_client_list);
extern struct adb_driver via_macii_driver;
-extern struct adb_driver via_maciisi_driver;
extern struct adb_driver via_cuda_driver;
extern struct adb_driver adb_iop_driver;
extern struct adb_driver via_pmu_driver;
@@ -59,9 +58,6 @@ static struct adb_driver *adb_driver_list[] = {
#ifdef CONFIG_ADB_MACII
&via_macii_driver,
#endif
-#ifdef CONFIG_ADB_MACIISI
- &via_maciisi_driver,
-#endif
#ifdef CONFIG_ADB_CUDA
&via_cuda_driver,
#endif
diff --git a/drivers/macintosh/via-cuda.c b/drivers/macintosh/via-cuda.c
index 2088e23a8002..c60415958dfe 100644
--- a/drivers/macintosh/via-cuda.c
+++ b/drivers/macintosh/via-cuda.c
@@ -1,10 +1,10 @@
/*
- * Device driver for the via-cuda on Apple Powermacs.
+ * Device driver for the Cuda and Egret system controllers found on PowerMacs
+ * and 68k Macs.
*
- * The VIA (versatile interface adapter) interfaces to the CUDA,
- * a 6805 microprocessor core which controls the ADB (Apple Desktop
- * Bus) which connects to the keyboard and mouse. The CUDA also
- * controls system power and the RTC (real time clock) chip.
+ * The Cuda or Egret is a 6805 microcontroller interfaced to the 6522 VIA.
+ * This MCU controls system power, Parameter RAM, Real Time Clock and the
+ * Apple Desktop Bus (ADB) that connects to the keyboard and mouse.
*
* Copyright (C) 1996 Paul Mackerras.
*/
@@ -50,10 +50,27 @@ static DEFINE_SPINLOCK(cuda_lock);
#define IER (14*RS) /* Interrupt enable register */
#define ANH (15*RS) /* A-side data, no handshake */
-/* Bits in B data register: all active low */
-#define TREQ 0x08 /* Transfer request (input) */
-#define TACK 0x10 /* Transfer acknowledge (output) */
-#define TIP 0x20 /* Transfer in progress (output) */
+/*
+ * When the Cuda design replaced the Egret, some signal names and
+ * logic sense changed. They all serve the same purposes, however.
+ *
+ * VIA pin | Egret pin
+ * ----------------+------------------------------------------
+ * PB3 (input) | Transceiver session (active low)
+ * PB4 (output) | VIA full (active high)
+ * PB5 (output) | System session (active high)
+ *
+ * VIA pin | Cuda pin
+ * ----------------+------------------------------------------
+ * PB3 (input) | Transfer request (active low)
+ * PB4 (output) | Byte acknowledge (active low)
+ * PB5 (output) | Transfer in progress (active low)
+ */
+
+/* Bits in Port B data register */
+#define TREQ 0x08 /* Transfer request */
+#define TACK 0x10 /* Transfer acknowledge */
+#define TIP 0x20 /* Transfer in progress */
/* Bits in ACR */
#define SR_CTRL 0x1c /* Shift register control bits */
@@ -65,6 +82,74 @@ static DEFINE_SPINLOCK(cuda_lock);
#define IER_CLR 0 /* clear bits in IER */
#define SR_INT 0x04 /* Shift register full/empty */
+/* Duration of byte acknowledgement pulse (us) */
+#define EGRET_TACK_ASSERTED_DELAY 300
+#define EGRET_TACK_NEGATED_DELAY 400
+
+/* Interval from interrupt to start of session (us) */
+#define EGRET_SESSION_DELAY 450
+
+#ifdef CONFIG_PPC
+#define mcu_is_egret false
+#else
+static bool mcu_is_egret;
+#endif
+
+static inline bool TREQ_asserted(u8 portb)
+{
+ return !(portb & TREQ);
+}
+
+static inline void assert_TIP(void)
+{
+ if (mcu_is_egret) {
+ udelay(EGRET_SESSION_DELAY);
+ out_8(&via[B], in_8(&via[B]) | TIP);
+ } else
+ out_8(&via[B], in_8(&via[B]) & ~TIP);
+}
+
+static inline void assert_TIP_and_TACK(void)
+{
+ if (mcu_is_egret) {
+ udelay(EGRET_SESSION_DELAY);
+ out_8(&via[B], in_8(&via[B]) | TIP | TACK);
+ } else
+ out_8(&via[B], in_8(&via[B]) & ~(TIP | TACK));
+}
+
+static inline void assert_TACK(void)
+{
+ if (mcu_is_egret) {
+ udelay(EGRET_TACK_NEGATED_DELAY);
+ out_8(&via[B], in_8(&via[B]) | TACK);
+ } else
+ out_8(&via[B], in_8(&via[B]) & ~TACK);
+}
+
+static inline void toggle_TACK(void)
+{
+ out_8(&via[B], in_8(&via[B]) ^ TACK);
+}
+
+static inline void negate_TACK(void)
+{
+ if (mcu_is_egret) {
+ udelay(EGRET_TACK_ASSERTED_DELAY);
+ out_8(&via[B], in_8(&via[B]) & ~TACK);
+ } else
+ out_8(&via[B], in_8(&via[B]) | TACK);
+}
+
+static inline void negate_TIP_and_TACK(void)
+{
+ if (mcu_is_egret) {
+ udelay(EGRET_TACK_ASSERTED_DELAY);
+ out_8(&via[B], in_8(&via[B]) & ~(TIP | TACK));
+ } else
+ out_8(&via[B], in_8(&via[B]) | TIP | TACK);
+}
+
static enum cuda_state {
idle,
sent_first_byte,
@@ -120,11 +205,13 @@ int __init find_via_cuda(void)
struct adb_request req;
int err;
- if (macintosh_config->adb_type != MAC_ADB_CUDA)
+ if (macintosh_config->adb_type != MAC_ADB_CUDA &&
+ macintosh_config->adb_type != MAC_ADB_EGRET)
return 0;
via = via1;
cuda_state = idle;
+ mcu_is_egret = macintosh_config->adb_type == MAC_ADB_EGRET;
err = cuda_init_via();
if (err) {
@@ -221,7 +308,7 @@ static int __init via_cuda_start(void)
return -EAGAIN;
}
- printk("Macintosh CUDA driver v0.5 for Unified ADB.\n");
+ pr_info("Macintosh Cuda and Egret driver.\n");
cuda_fully_inited = 1;
return 0;
@@ -237,7 +324,8 @@ cuda_probe(void)
if (sys_ctrler != SYS_CTRLER_CUDA)
return -ENODEV;
#else
- if (macintosh_config->adb_type != MAC_ADB_CUDA)
+ if (macintosh_config->adb_type != MAC_ADB_CUDA &&
+ macintosh_config->adb_type != MAC_ADB_EGRET)
return -ENODEV;
#endif
if (via == NULL)
@@ -246,12 +334,39 @@ cuda_probe(void)
}
#endif /* CONFIG_ADB */
+static int __init sync_egret(void)
+{
+ if (TREQ_asserted(in_8(&via[B]))) {
+ /* Complete the inbound transfer */
+ assert_TIP_and_TACK();
+ while (1) {
+ negate_TACK();
+ mdelay(1);
+ (void)in_8(&via[SR]);
+ assert_TACK();
+ if (!TREQ_asserted(in_8(&via[B])))
+ break;
+ }
+ negate_TIP_and_TACK();
+ } else if (in_8(&via[B]) & TIP) {
+ /* Terminate the outbound transfer */
+ negate_TACK();
+ assert_TACK();
+ mdelay(1);
+ negate_TIP_and_TACK();
+ }
+ /* Clear shift register interrupt */
+ if (in_8(&via[IFR]) & SR_INT)
+ (void)in_8(&via[SR]);
+ return 0;
+}
+
#define WAIT_FOR(cond, what) \
do { \
int x; \
for (x = 1000; !(cond); --x) { \
if (x == 0) { \
- printk("Timeout waiting for " what "\n"); \
+ pr_err("Timeout waiting for " what "\n"); \
return -ENXIO; \
} \
udelay(100); \
@@ -261,10 +376,6 @@ cuda_probe(void)
static int
__init cuda_init_via(void)
{
- out_8(&via[DIRB], (in_8(&via[DIRB]) | TACK | TIP) & ~TREQ); /* TACK & TIP out */
- out_8(&via[B], in_8(&via[B]) | TACK | TIP); /* negate them */
- out_8(&via[ACR] ,(in_8(&via[ACR]) & ~SR_CTRL) | SR_EXT); /* SR data in */
- (void)in_8(&via[SR]); /* clear any left-over data */
#ifdef CONFIG_PPC
out_8(&via[IER], 0x7f); /* disable interrupts from VIA */
(void)in_8(&via[IER]);
@@ -272,16 +383,25 @@ __init cuda_init_via(void)
out_8(&via[IER], SR_INT); /* disable SR interrupt from VIA */
#endif
+ out_8(&via[DIRB], (in_8(&via[DIRB]) | TACK | TIP) & ~TREQ); /* TACK & TIP out */
+ out_8(&via[ACR], (in_8(&via[ACR]) & ~SR_CTRL) | SR_EXT); /* SR data in */
+ (void)in_8(&via[SR]); /* clear any left-over data */
+
+ if (mcu_is_egret)
+ return sync_egret();
+
+ negate_TIP_and_TACK();
+
/* delay 4ms and then clear any pending interrupt */
mdelay(4);
(void)in_8(&via[SR]);
out_8(&via[IFR], SR_INT);
/* sync with the CUDA - assert TACK without TIP */
- out_8(&via[B], in_8(&via[B]) & ~TACK);
+ assert_TACK();
/* wait for the CUDA to assert TREQ in response */
- WAIT_FOR((in_8(&via[B]) & TREQ) == 0, "CUDA response to sync");
+ WAIT_FOR(TREQ_asserted(in_8(&via[B])), "CUDA response to sync");
/* wait for the interrupt and then clear it */
WAIT_FOR(in_8(&via[IFR]) & SR_INT, "CUDA response to sync (2)");
@@ -289,14 +409,13 @@ __init cuda_init_via(void)
out_8(&via[IFR], SR_INT);
/* finish the sync by negating TACK */
- out_8(&via[B], in_8(&via[B]) | TACK);
+ negate_TACK();
/* wait for the CUDA to negate TREQ and the corresponding interrupt */
- WAIT_FOR(in_8(&via[B]) & TREQ, "CUDA response to sync (3)");
+ WAIT_FOR(!TREQ_asserted(in_8(&via[B])), "CUDA response to sync (3)");
WAIT_FOR(in_8(&via[IFR]) & SR_INT, "CUDA response to sync (4)");
(void)in_8(&via[SR]);
out_8(&via[IFR], SR_INT);
- out_8(&via[B], in_8(&via[B]) | TIP); /* should be unnecessary */
return 0;
}
@@ -357,6 +476,7 @@ cuda_reset_adb_bus(void)
return 0;
}
#endif /* CONFIG_ADB */
+
/* Construct and send a cuda request */
int
cuda_request(struct adb_request *req, void (*done)(struct adb_request *),
@@ -413,47 +533,43 @@ cuda_write(struct adb_request *req)
static void
cuda_start(void)
{
- struct adb_request *req;
-
/* assert cuda_state == idle */
- /* get the packet to send */
- req = current_req;
- if (req == 0)
+ if (current_req == NULL)
return;
- if ((in_8(&via[B]) & TREQ) == 0)
+ data_index = 0;
+ if (TREQ_asserted(in_8(&via[B])))
return; /* a byte is coming in from the CUDA */
/* set the shift register to shift out and send a byte */
out_8(&via[ACR], in_8(&via[ACR]) | SR_OUT);
- out_8(&via[SR], req->data[0]);
- out_8(&via[B], in_8(&via[B]) & ~TIP);
+ out_8(&via[SR], current_req->data[data_index++]);
+ if (mcu_is_egret)
+ assert_TIP_and_TACK();
+ else
+ assert_TIP();
cuda_state = sent_first_byte;
}
void
cuda_poll(void)
{
- /* cuda_interrupt only takes a normal lock, we disable
- * interrupts here to avoid re-entering and thus deadlocking.
- */
- if (cuda_irq)
- disable_irq(cuda_irq);
- cuda_interrupt(0, NULL);
- if (cuda_irq)
- enable_irq(cuda_irq);
+ cuda_interrupt(0, NULL);
}
EXPORT_SYMBOL(cuda_poll);
+#define ARRAY_FULL(a, p) ((p) - (a) == ARRAY_SIZE(a))
+
static irqreturn_t
cuda_interrupt(int irq, void *arg)
{
- int status;
+ unsigned long flags;
+ u8 status;
struct adb_request *req = NULL;
unsigned char ibuf[16];
int ibuf_len = 0;
int complete = 0;
- spin_lock(&cuda_lock);
+ spin_lock_irqsave(&cuda_lock, flags);
/* On powermacs, this handler is registered for the VIA IRQ. But they use
* just the shift register IRQ -- other VIA interrupt sources are disabled.
@@ -466,52 +582,50 @@ cuda_interrupt(int irq, void *arg)
#endif
{
if ((in_8(&via[IFR]) & SR_INT) == 0) {
- spin_unlock(&cuda_lock);
+ spin_unlock_irqrestore(&cuda_lock, flags);
return IRQ_NONE;
} else {
out_8(&via[IFR], SR_INT);
}
}
-
- status = (~in_8(&via[B]) & (TIP|TREQ)) | (in_8(&via[ACR]) & SR_OUT);
- /* printk("cuda_interrupt: state=%d status=%x\n", cuda_state, status); */
+
+ status = in_8(&via[B]) & (TIP | TACK | TREQ);
+
switch (cuda_state) {
case idle:
- /* CUDA has sent us the first byte of data - unsolicited */
- if (status != TREQ)
- printk("cuda: state=idle, status=%x\n", status);
+ /* System controller has unsolicited data for us */
(void)in_8(&via[SR]);
- out_8(&via[B], in_8(&via[B]) & ~TIP);
+idle_state:
+ assert_TIP();
cuda_state = reading;
reply_ptr = cuda_rbuf;
reading_reply = 0;
break;
case awaiting_reply:
- /* CUDA has sent us the first byte of data of a reply */
- if (status != TREQ)
- printk("cuda: state=awaiting_reply, status=%x\n", status);
+ /* System controller has reply data for us */
(void)in_8(&via[SR]);
- out_8(&via[B], in_8(&via[B]) & ~TIP);
+ assert_TIP();
cuda_state = reading;
reply_ptr = current_req->reply;
reading_reply = 1;
break;
case sent_first_byte:
- if (status == TREQ + TIP + SR_OUT) {
+ if (TREQ_asserted(status)) {
/* collision */
out_8(&via[ACR], in_8(&via[ACR]) & ~SR_OUT);
(void)in_8(&via[SR]);
- out_8(&via[B], in_8(&via[B]) | TIP | TACK);
+ negate_TIP_and_TACK();
cuda_state = idle;
+ /* Egret does not raise an "aborted" interrupt */
+ if (mcu_is_egret)
+ goto idle_state;
} else {
- /* assert status == TIP + SR_OUT */
- if (status != TIP + SR_OUT)
- printk("cuda: state=sent_first_byte status=%x\n", status);
- out_8(&via[SR], current_req->data[1]);
- out_8(&via[B], in_8(&via[B]) ^ TACK);
- data_index = 2;
+ out_8(&via[SR], current_req->data[data_index++]);
+ toggle_TACK();
+ if (mcu_is_egret)
+ assert_TACK();
cuda_state = sending;
}
break;
@@ -521,7 +635,7 @@ cuda_interrupt(int irq, void *arg)
if (data_index >= req->nbytes) {
out_8(&via[ACR], in_8(&via[ACR]) & ~SR_OUT);
(void)in_8(&via[SR]);
- out_8(&via[B], in_8(&via[B]) | TACK | TIP);
+ negate_TIP_and_TACK();
req->sent = 1;
if (req->reply_expected) {
cuda_state = awaiting_reply;
@@ -534,26 +648,37 @@ cuda_interrupt(int irq, void *arg)
}
} else {
out_8(&via[SR], req->data[data_index++]);
- out_8(&via[B], in_8(&via[B]) ^ TACK);
+ toggle_TACK();
+ if (mcu_is_egret)
+ assert_TACK();
}
break;
case reading:
- *reply_ptr++ = in_8(&via[SR]);
- if (status == TIP) {
+ if (reading_reply ? ARRAY_FULL(current_req->reply, reply_ptr)
+ : ARRAY_FULL(cuda_rbuf, reply_ptr))
+ (void)in_8(&via[SR]);
+ else
+ *reply_ptr++ = in_8(&via[SR]);
+ if (!TREQ_asserted(status)) {
+ if (mcu_is_egret)
+ assert_TACK();
/* that's all folks */
- out_8(&via[B], in_8(&via[B]) | TACK | TIP);
+ negate_TIP_and_TACK();
cuda_state = read_done;
+ /* Egret does not raise a "read done" interrupt */
+ if (mcu_is_egret)
+ goto read_done_state;
} else {
- /* assert status == TIP | TREQ */
- if (status != TIP + TREQ)
- printk("cuda: state=reading status=%x\n", status);
- out_8(&via[B], in_8(&via[B]) ^ TACK);
+ toggle_TACK();
+ if (mcu_is_egret)
+ negate_TACK();
}
break;
case read_done:
(void)in_8(&via[SR]);
+read_done_state:
if (reading_reply) {
req = current_req;
req->reply_len = reply_ptr - req->reply;
@@ -570,6 +695,7 @@ cuda_interrupt(int irq, void *arg)
}
current_req = req->next;
complete = 1;
+ reading_reply = 0;
} else {
/* This is tricky. We must break the spinlock to call
* cuda_input. However, doing so means we might get
@@ -581,21 +707,19 @@ cuda_interrupt(int irq, void *arg)
ibuf_len = reply_ptr - cuda_rbuf;
memcpy(ibuf, cuda_rbuf, ibuf_len);
}
- if (status == TREQ) {
- out_8(&via[B], in_8(&via[B]) & ~TIP);
+ reply_ptr = cuda_rbuf;
+ cuda_state = idle;
+ cuda_start();
+ if (cuda_state == idle && TREQ_asserted(in_8(&via[B]))) {
+ assert_TIP();
cuda_state = reading;
- reply_ptr = cuda_rbuf;
- reading_reply = 0;
- } else {
- cuda_state = idle;
- cuda_start();
}
break;
default:
- printk("cuda_interrupt: unknown cuda_state %d?\n", cuda_state);
+ pr_err("cuda_interrupt: unknown cuda_state %d?\n", cuda_state);
}
- spin_unlock(&cuda_lock);
+ spin_unlock_irqrestore(&cuda_lock, flags);
if (complete && req) {
void (*done)(struct adb_request *) = req->done;
mb();
@@ -614,8 +738,6 @@ cuda_interrupt(int irq, void *arg)
static void
cuda_input(unsigned char *buf, int nb)
{
- int i;
-
switch (buf[0]) {
case ADB_PACKET:
#ifdef CONFIG_XMON
@@ -632,10 +754,14 @@ cuda_input(unsigned char *buf, int nb)
#endif /* CONFIG_ADB */
break;
+ case TIMER_PACKET:
+ /* Egret sends these periodically. Might be useful as a 'heartbeat'
+ * to trigger a recovery for the VIA shift register errata.
+ */
+ break;
+
default:
- printk("data from cuda (%d bytes):", nb);
- for (i = 0; i < nb; ++i)
- printk(" %.2x", buf[i]);
- printk("\n");
+ print_hex_dump(KERN_INFO, "cuda_input: ", DUMP_PREFIX_NONE, 32, 1,
+ buf, nb, false);
}
}
diff --git a/drivers/macintosh/via-maciisi.c b/drivers/macintosh/via-maciisi.c
deleted file mode 100644
index 34d02a91b29f..000000000000
--- a/drivers/macintosh/via-maciisi.c
+++ /dev/null
@@ -1,677 +0,0 @@
-/*
- * Device driver for the IIsi-style ADB on some Mac LC and II-class machines
- *
- * Based on via-cuda.c and via-macii.c, as well as the original
- * adb-bus.c, which in turn is somewhat influenced by (but uses no
- * code from) the NetBSD HWDIRECT ADB code. Original IIsi driver work
- * was done by Robert Thompson and integrated into the old style
- * driver by Michael Schmitz.
- *
- * Original sources (c) Alan Cox, Paul Mackerras, and others.
- *
- * Rewritten for Unified ADB by David Huggins-Daines <dhd@debian.org>
- *
- * 7/13/2000- extensive changes by Andrew McPherson <andrew@macduff.dhs.org>
- * Works about 30% of the time now.
- */
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/adb.h>
-#include <linux/cuda.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <asm/macintosh.h>
-#include <asm/macints.h>
-#include <asm/mac_via.h>
-
-static volatile unsigned char *via;
-
-/* VIA registers - spaced 0x200 bytes apart - only the ones we actually use */
-#define RS 0x200 /* skip between registers */
-#define B 0 /* B-side data */
-#define A RS /* A-side data */
-#define DIRB (2*RS) /* B-side direction (1=output) */
-#define DIRA (3*RS) /* A-side direction (1=output) */
-#define SR (10*RS) /* Shift register */
-#define ACR (11*RS) /* Auxiliary control register */
-#define IFR (13*RS) /* Interrupt flag register */
-#define IER (14*RS) /* Interrupt enable register */
-
-/* Bits in B data register: all active low */
-#define TREQ 0x08 /* Transfer request (input) */
-#define TACK 0x10 /* Transfer acknowledge (output) */
-#define TIP 0x20 /* Transfer in progress (output) */
-#define ST_MASK 0x30 /* mask for selecting ADB state bits */
-
-/* Bits in ACR */
-#define SR_CTRL 0x1c /* Shift register control bits */
-#define SR_EXT 0x0c /* Shift on external clock */
-#define SR_OUT 0x10 /* Shift out if 1 */
-
-/* Bits in IFR and IER */
-#define IER_SET 0x80 /* set bits in IER */
-#define IER_CLR 0 /* clear bits in IER */
-#define SR_INT 0x04 /* Shift register full/empty */
-#define SR_DATA 0x08 /* Shift register data */
-#define SR_CLOCK 0x10 /* Shift register clock */
-
-#define ADB_DELAY 150
-
-#undef DEBUG_MACIISI_ADB
-
-static struct adb_request* current_req;
-static struct adb_request* last_req;
-static unsigned char maciisi_rbuf[16];
-static unsigned char *reply_ptr;
-static int data_index;
-static int reading_reply;
-static int reply_len;
-static int tmp;
-static int need_sync;
-
-static enum maciisi_state {
- idle,
- sending,
- reading,
-} maciisi_state;
-
-static int maciisi_probe(void);
-static int maciisi_init(void);
-static int maciisi_send_request(struct adb_request* req, int sync);
-static void maciisi_sync(struct adb_request *req);
-static int maciisi_write(struct adb_request* req);
-static irqreturn_t maciisi_interrupt(int irq, void* arg);
-static void maciisi_input(unsigned char *buf, int nb);
-static int maciisi_init_via(void);
-static void maciisi_poll(void);
-static int maciisi_start(void);
-
-struct adb_driver via_maciisi_driver = {
- "Mac IIsi",
- maciisi_probe,
- maciisi_init,
- maciisi_send_request,
- NULL, /* maciisi_adb_autopoll, */
- maciisi_poll,
- NULL /* maciisi_reset_adb_bus */
-};
-
-static int
-maciisi_probe(void)
-{
- if (macintosh_config->adb_type != MAC_ADB_IISI)
- return -ENODEV;
-
- via = via1;
- return 0;
-}
-
-static int
-maciisi_init(void)
-{
- int err;
-
- if (via == NULL)
- return -ENODEV;
-
- if ((err = maciisi_init_via())) {
- printk(KERN_ERR "maciisi_init: maciisi_init_via() failed, code %d\n", err);
- via = NULL;
- return err;
- }
-
- if (request_irq(IRQ_MAC_ADB, maciisi_interrupt, 0, "ADB",
- maciisi_interrupt)) {
- printk(KERN_ERR "maciisi_init: can't get irq %d\n", IRQ_MAC_ADB);
- return -EAGAIN;
- }
-
- printk("adb: Mac IIsi driver v0.2 for Unified ADB.\n");
- return 0;
-}
-
-/* Flush data from the ADB controller */
-static void
-maciisi_stfu(void)
-{
- int status = via[B] & (TIP|TREQ);
-
- if (status & TREQ) {
-#ifdef DEBUG_MACIISI_ADB
- printk (KERN_DEBUG "maciisi_stfu called with TREQ high!\n");
-#endif
- return;
- }
-
- udelay(ADB_DELAY);
- via[ACR] &= ~SR_OUT;
- via[IER] = IER_CLR | SR_INT;
-
- udelay(ADB_DELAY);
-
- status = via[B] & (TIP|TREQ);
-
- if (!(status & TREQ))
- {
- via[B] |= TIP;
-
- while(1)
- {
- int poll_timeout = ADB_DELAY * 5;
- /* Poll for SR interrupt */
- while (!(via[IFR] & SR_INT) && poll_timeout-- > 0)
- status = via[B] & (TIP|TREQ);
-
- tmp = via[SR]; /* Clear shift register */
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "maciisi_stfu: status %x timeout %d data %x\n",
- status, poll_timeout, tmp);
-#endif
- if(via[B] & TREQ)
- break;
-
- /* ACK on-off */
- via[B] |= TACK;
- udelay(ADB_DELAY);
- via[B] &= ~TACK;
- }
-
- /* end frame */
- via[B] &= ~TIP;
- udelay(ADB_DELAY);
- }
-
- via[IER] = IER_SET | SR_INT;
-}
-
-/* All specifically VIA-related initialization goes here */
-static int
-maciisi_init_via(void)
-{
- int i;
-
- /* Set the lines up. We want TREQ as input TACK|TIP as output */
- via[DIRB] = (via[DIRB] | TACK | TIP) & ~TREQ;
- /* Shift register on input */
- via[ACR] = (via[ACR] & ~SR_CTRL) | SR_EXT;
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "maciisi_init_via: initial status %x\n", via[B] & (TIP|TREQ));
-#endif
- /* Wipe any pending data and int */
- tmp = via[SR];
- /* Enable keyboard interrupts */
- via[IER] = IER_SET | SR_INT;
- /* Set initial state: idle */
- via[B] &= ~(TACK|TIP);
- /* Clear interrupt bit */
- via[IFR] = SR_INT;
-
- for(i = 0; i < 60; i++) {
- udelay(ADB_DELAY);
- maciisi_stfu();
- udelay(ADB_DELAY);
- if(via[B] & TREQ)
- break;
- }
- if (i == 60)
- printk(KERN_ERR "maciisi_init_via: bus jam?\n");
-
- maciisi_state = idle;
- need_sync = 0;
-
- return 0;
-}
-
-/* Send a request, possibly waiting for a reply */
-static int
-maciisi_send_request(struct adb_request* req, int sync)
-{
- int i;
-
-#ifdef DEBUG_MACIISI_ADB
- static int dump_packet = 0;
-#endif
-
- if (via == NULL) {
- req->complete = 1;
- return -ENXIO;
- }
-
-#ifdef DEBUG_MACIISI_ADB
- if (dump_packet) {
- printk(KERN_DEBUG "maciisi_send_request:");
- for (i = 0; i < req->nbytes; i++) {
- printk(" %.2x", req->data[i]);
- }
- printk(" sync %d\n", sync);
- }
-#endif
-
- req->reply_expected = 1;
-
- i = maciisi_write(req);
- if (i)
- {
- /* Normally, if a packet requires syncing, that happens at the end of
- * maciisi_send_request. But if the transfer fails, it will be restarted
- * by maciisi_interrupt(). We use need_sync to tell maciisi_interrupt
- * when to sync a packet that it sends out.
- *
- * Suggestions on a better way to do this are welcome.
- */
- if(i == -EBUSY && sync)
- need_sync = 1;
- else
- need_sync = 0;
- return i;
- }
- if(sync)
- maciisi_sync(req);
-
- return 0;
-}
-
-/* Poll the ADB chip until the request completes */
-static void maciisi_sync(struct adb_request *req)
-{
- int count = 0;
-
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "maciisi_sync called\n");
-#endif
-
- /* If for some reason the ADB chip shuts up on us, we want to avoid an endless loop. */
- while (!req->complete && count++ < 50) {
- maciisi_poll();
- }
- /* This could be BAD... when the ADB controller doesn't respond
- * for this long, it's probably not coming back :-( */
- if (count > 50) /* Hopefully shouldn't happen */
- printk(KERN_ERR "maciisi_send_request: poll timed out!\n");
-}
-
-int
-maciisi_request(struct adb_request *req, void (*done)(struct adb_request *),
- int nbytes, ...)
-{
- va_list list;
- int i;
-
- req->nbytes = nbytes;
- req->done = done;
- req->reply_expected = 0;
- va_start(list, nbytes);
- for (i = 0; i < nbytes; i++)
- req->data[i++] = va_arg(list, int);
- va_end(list);
-
- return maciisi_send_request(req, 1);
-}
-
-/* Enqueue a request, and run the queue if possible */
-static int
-maciisi_write(struct adb_request* req)
-{
- unsigned long flags;
- int i;
-
- /* We will accept CUDA packets - the VIA sends them to us, so
- it figures that we should be able to send them to it */
- if (req->nbytes < 2 || req->data[0] > CUDA_PACKET) {
- printk(KERN_ERR "maciisi_write: packet too small or not an ADB or CUDA packet\n");
- req->complete = 1;
- return -EINVAL;
- }
- req->next = NULL;
- req->sent = 0;
- req->complete = 0;
- req->reply_len = 0;
-
- local_irq_save(flags);
-
- if (current_req) {
- last_req->next = req;
- last_req = req;
- } else {
- current_req = req;
- last_req = req;
- }
- if (maciisi_state == idle)
- {
- i = maciisi_start();
- if(i != 0)
- {
- local_irq_restore(flags);
- return i;
- }
- }
- else
- {
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "maciisi_write: would start, but state is %d\n", maciisi_state);
-#endif
- local_irq_restore(flags);
- return -EBUSY;
- }
-
- local_irq_restore(flags);
-
- return 0;
-}
-
-static int
-maciisi_start(void)
-{
- struct adb_request* req;
- int status;
-
-#ifdef DEBUG_MACIISI_ADB
- status = via[B] & (TIP | TREQ);
-
- printk(KERN_DEBUG "maciisi_start called, state=%d, status=%x, ifr=%x\n", maciisi_state, status, via[IFR]);
-#endif
-
- if (maciisi_state != idle) {
- /* shouldn't happen */
- printk(KERN_ERR "maciisi_start: maciisi_start called when driver busy!\n");
- return -EBUSY;
- }
-
- req = current_req;
- if (req == NULL)
- return -EINVAL;
-
- status = via[B] & (TIP|TREQ);
- if (!(status & TREQ)) {
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "maciisi_start: bus busy - aborting\n");
-#endif
- return -EBUSY;
- }
-
- /* Okay, send */
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "maciisi_start: sending\n");
-#endif
- /* Set state to active */
- via[B] |= TIP;
- /* ACK off */
- via[B] &= ~TACK;
- /* Delay */
- udelay(ADB_DELAY);
- /* Shift out and send */
- via[ACR] |= SR_OUT;
- via[SR] = req->data[0];
- data_index = 1;
- /* ACK on */
- via[B] |= TACK;
- maciisi_state = sending;
-
- return 0;
-}
-
-void
-maciisi_poll(void)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- if (via[IFR] & SR_INT) {
- maciisi_interrupt(0, NULL);
- }
- else /* avoid calling this function too quickly in a loop */
- udelay(ADB_DELAY);
-
- local_irq_restore(flags);
-}
-
-/* Shift register interrupt - this is *supposed* to mean that the
- register is either full or empty. In practice, I have no idea what
- it means :( */
-static irqreturn_t
-maciisi_interrupt(int irq, void* arg)
-{
- int status;
- struct adb_request *req;
-#ifdef DEBUG_MACIISI_ADB
- static int dump_reply = 0;
-#endif
- int i;
- unsigned long flags;
-
- local_irq_save(flags);
-
- status = via[B] & (TIP|TREQ);
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "state %d status %x ifr %x\n", maciisi_state, status, via[IFR]);
-#endif
-
- if (!(via[IFR] & SR_INT)) {
- /* Shouldn't happen, we hope */
- printk(KERN_ERR "maciisi_interrupt: called without interrupt flag set\n");
- local_irq_restore(flags);
- return IRQ_NONE;
- }
-
- /* Clear the interrupt */
- /* via[IFR] = SR_INT; */
-
- switch_start:
- switch (maciisi_state) {
- case idle:
- if (status & TIP)
- printk(KERN_ERR "maciisi_interrupt: state is idle but TIP asserted!\n");
-
- if(!reading_reply)
- udelay(ADB_DELAY);
- /* Shift in */
- via[ACR] &= ~SR_OUT;
- /* Signal start of frame */
- via[B] |= TIP;
- /* Clear the interrupt (throw this value on the floor, it's useless) */
- tmp = via[SR];
- /* ACK adb chip, high-low */
- via[B] |= TACK;
- udelay(ADB_DELAY);
- via[B] &= ~TACK;
- reply_len = 0;
- maciisi_state = reading;
- if (reading_reply) {
- reply_ptr = current_req->reply;
- } else {
- reply_ptr = maciisi_rbuf;
- }
- break;
-
- case sending:
- /* via[SR]; */
- /* Set ACK off */
- via[B] &= ~TACK;
- req = current_req;
-
- if (!(status & TREQ)) {
- /* collision */
- printk(KERN_ERR "maciisi_interrupt: send collision\n");
- /* Set idle and input */
- via[ACR] &= ~SR_OUT;
- tmp = via[SR];
- via[B] &= ~TIP;
- /* Must re-send */
- reading_reply = 0;
- reply_len = 0;
- maciisi_state = idle;
- udelay(ADB_DELAY);
- /* process this now, because the IFR has been cleared */
- goto switch_start;
- }
-
- udelay(ADB_DELAY);
-
- if (data_index >= req->nbytes) {
- /* Sent the whole packet, put the bus back in idle state */
- /* Shift in, we are about to read a reply (hopefully) */
- via[ACR] &= ~SR_OUT;
- tmp = via[SR];
- /* End of frame */
- via[B] &= ~TIP;
- req->sent = 1;
- maciisi_state = idle;
- if (req->reply_expected) {
- /* Note: only set this once we've
- successfully sent the packet */
- reading_reply = 1;
- } else {
- current_req = req->next;
- if (req->done)
- (*req->done)(req);
- /* Do any queued requests now */
- i = maciisi_start();
- if(i == 0 && need_sync) {
- /* Packet needs to be synced */
- maciisi_sync(current_req);
- }
- if(i != -EBUSY)
- need_sync = 0;
- }
- } else {
- /* Sending more stuff */
- /* Shift out */
- via[ACR] |= SR_OUT;
- /* Write */
- via[SR] = req->data[data_index++];
- /* Signal 'byte ready' */
- via[B] |= TACK;
- }
- break;
-
- case reading:
- /* Shift in */
- /* via[ACR] &= ~SR_OUT; */ /* Not in 2.2 */
- if (reply_len++ > 16) {
- printk(KERN_ERR "maciisi_interrupt: reply too long, aborting read\n");
- via[B] |= TACK;
- udelay(ADB_DELAY);
- via[B] &= ~(TACK|TIP);
- maciisi_state = idle;
- i = maciisi_start();
- if(i == 0 && need_sync) {
- /* Packet needs to be synced */
- maciisi_sync(current_req);
- }
- if(i != -EBUSY)
- need_sync = 0;
- break;
- }
- /* Read data */
- *reply_ptr++ = via[SR];
- status = via[B] & (TIP|TREQ);
- /* ACK on/off */
- via[B] |= TACK;
- udelay(ADB_DELAY);
- via[B] &= ~TACK;
- if (!(status & TREQ))
- break; /* more stuff to deal with */
-
- /* end of frame */
- via[B] &= ~TIP;
- tmp = via[SR]; /* That's what happens in 2.2 */
- udelay(ADB_DELAY); /* Give controller time to recover */
-
- /* end of packet, deal with it */
- if (reading_reply) {
- req = current_req;
- req->reply_len = reply_ptr - req->reply;
- if (req->data[0] == ADB_PACKET) {
- /* Have to adjust the reply from ADB commands */
- if (req->reply_len <= 2 || (req->reply[1] & 2) != 0) {
- /* the 0x2 bit indicates no response */
- req->reply_len = 0;
- } else {
- /* leave just the command and result bytes in the reply */
- req->reply_len -= 2;
- memmove(req->reply, req->reply + 2, req->reply_len);
- }
- }
-#ifdef DEBUG_MACIISI_ADB
- if (dump_reply) {
- int i;
- printk(KERN_DEBUG "maciisi_interrupt: reply is ");
- for (i = 0; i < req->reply_len; ++i)
- printk(" %.2x", req->reply[i]);
- printk("\n");
- }
-#endif
- req->complete = 1;
- current_req = req->next;
- if (req->done)
- (*req->done)(req);
- /* Obviously, we got it */
- reading_reply = 0;
- } else {
- maciisi_input(maciisi_rbuf, reply_ptr - maciisi_rbuf);
- }
- maciisi_state = idle;
- status = via[B] & (TIP|TREQ);
- if (!(status & TREQ)) {
- /* Timeout?! More likely, another packet coming in already */
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "extra data after packet: status %x ifr %x\n",
- status, via[IFR]);
-#endif
-#if 0
- udelay(ADB_DELAY);
- via[B] |= TIP;
-
- maciisi_state = reading;
- reading_reply = 0;
- reply_ptr = maciisi_rbuf;
-#else
- /* Process the packet now */
- reading_reply = 0;
- goto switch_start;
-#endif
- /* We used to do this... but the controller might actually have data for us */
- /* maciisi_stfu(); */
- }
- else {
- /* Do any queued requests now if possible */
- i = maciisi_start();
- if(i == 0 && need_sync) {
- /* Packet needs to be synced */
- maciisi_sync(current_req);
- }
- if(i != -EBUSY)
- need_sync = 0;
- }
- break;
-
- default:
- printk("maciisi_interrupt: unknown maciisi_state %d?\n", maciisi_state);
- }
- local_irq_restore(flags);
- return IRQ_HANDLED;
-}
-
-static void
-maciisi_input(unsigned char *buf, int nb)
-{
-#ifdef DEBUG_MACIISI_ADB
- int i;
-#endif
-
- switch (buf[0]) {
- case ADB_PACKET:
- adb_input(buf+2, nb-2, buf[1] & 0x40);
- break;
- default:
-#ifdef DEBUG_MACIISI_ADB
- printk(KERN_DEBUG "data from IIsi ADB (%d bytes):", nb);
- for (i = 0; i < nb; ++i)
- printk(" %.2x", buf[i]);
- printk("\n");
-#endif
- break;
- }
-}
diff --git a/drivers/misc/cxl/Makefile b/drivers/misc/cxl/Makefile
index 56e9a4732ef0..c14fd6b65b5a 100644
--- a/drivers/misc/cxl/Makefile
+++ b/drivers/misc/cxl/Makefile
@@ -2,9 +2,10 @@ ccflags-y := $(call cc-disable-warning, unused-const-variable)
ccflags-$(CONFIG_PPC_WERROR) += -Werror
cxl-y += main.o file.o irq.o fault.o native.o
-cxl-y += context.o sysfs.o debugfs.o pci.o trace.o
+cxl-y += context.o sysfs.o pci.o trace.o
cxl-y += vphb.o phb.o api.o
cxl-$(CONFIG_PPC_PSERIES) += flash.o guest.o of.o hcalls.o
+cxl-$(CONFIG_DEBUG_FS) += debugfs.o
obj-$(CONFIG_CXL) += cxl.o
obj-$(CONFIG_CXL_BASE) += base.o
diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c
index 1b35e33d2434..bcc030eacab7 100644
--- a/drivers/misc/cxl/api.c
+++ b/drivers/misc/cxl/api.c
@@ -11,7 +11,6 @@
#include <linux/slab.h>
#include <linux/file.h>
#include <misc/cxl.h>
-#include <asm/pnv-pci.h>
#include <linux/msi.h>
#include <linux/module.h>
#include <linux/mount.h>
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index b24d76723fb0..6c722d96b775 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -418,6 +418,8 @@ struct cxl_afu {
struct dentry *debugfs;
struct mutex contexts_lock;
spinlock_t afu_cntl_lock;
+ /* Used to block access to AFU config space while deconfigured */
+ struct rw_semaphore configured_rwsem;
/* AFU error buffer fields and bin attribute for sysfs */
u64 eb_len, eb_offset;
@@ -800,12 +802,67 @@ int afu_register_irqs(struct cxl_context *ctx, u32 count);
void afu_release_irqs(struct cxl_context *ctx, void *cookie);
void afu_irq_name_free(struct cxl_context *ctx);
+#ifdef CONFIG_DEBUG_FS
+
int cxl_debugfs_init(void);
void cxl_debugfs_exit(void);
int cxl_debugfs_adapter_add(struct cxl *adapter);
void cxl_debugfs_adapter_remove(struct cxl *adapter);
int cxl_debugfs_afu_add(struct cxl_afu *afu);
void cxl_debugfs_afu_remove(struct cxl_afu *afu);
+void cxl_stop_trace(struct cxl *cxl);
+void cxl_debugfs_add_adapter_psl_regs(struct cxl *adapter, struct dentry *dir);
+void cxl_debugfs_add_adapter_xsl_regs(struct cxl *adapter, struct dentry *dir);
+void cxl_debugfs_add_afu_psl_regs(struct cxl_afu *afu, struct dentry *dir);
+
+#else /* CONFIG_DEBUG_FS */
+
+static inline int __init cxl_debugfs_init(void)
+{
+ return 0;
+}
+
+static inline void cxl_debugfs_exit(void)
+{
+}
+
+static inline int cxl_debugfs_adapter_add(struct cxl *adapter)
+{
+ return 0;
+}
+
+static inline void cxl_debugfs_adapter_remove(struct cxl *adapter)
+{
+}
+
+static inline int cxl_debugfs_afu_add(struct cxl_afu *afu)
+{
+ return 0;
+}
+
+static inline void cxl_debugfs_afu_remove(struct cxl_afu *afu)
+{
+}
+
+static inline void cxl_stop_trace(struct cxl *cxl)
+{
+}
+
+static inline void cxl_debugfs_add_adapter_psl_regs(struct cxl *adapter,
+ struct dentry *dir)
+{
+}
+
+static inline void cxl_debugfs_add_adapter_xsl_regs(struct cxl *adapter,
+ struct dentry *dir)
+{
+}
+
+static inline void cxl_debugfs_add_afu_psl_regs(struct cxl_afu *afu, struct dentry *dir)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
void cxl_handle_fault(struct work_struct *work);
void cxl_prefault(struct cxl_context *ctx, u64 wed);
@@ -870,12 +927,8 @@ int cxl_data_cache_flush(struct cxl *adapter);
int cxl_afu_disable(struct cxl_afu *afu);
int cxl_psl_purge(struct cxl_afu *afu);
-void cxl_debugfs_add_adapter_psl_regs(struct cxl *adapter, struct dentry *dir);
-void cxl_debugfs_add_adapter_xsl_regs(struct cxl *adapter, struct dentry *dir);
-void cxl_debugfs_add_afu_psl_regs(struct cxl_afu *afu, struct dentry *dir);
void cxl_native_psl_irq_dump_regs(struct cxl_context *ctx);
void cxl_native_err_irq_dump_regs(struct cxl *adapter);
-void cxl_stop_trace(struct cxl *cxl);
int cxl_pci_vphb_add(struct cxl_afu *afu);
void cxl_pci_vphb_remove(struct cxl_afu *afu);
void cxl_release_mapping(struct cxl_context *ctx);
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index 62e0dfb5f15b..2a6bf1d0a3a4 100644
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -268,7 +268,8 @@ struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice)
idr_init(&afu->contexts_idr);
mutex_init(&afu->contexts_lock);
spin_lock_init(&afu->afu_cntl_lock);
-
+ init_rwsem(&afu->configured_rwsem);
+ down_write(&afu->configured_rwsem);
afu->prefault_mode = CXL_PREFAULT_NONE;
afu->irqs_max = afu->adapter->user_irqs;
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 80a87ab25b83..cca938845ffd 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1129,6 +1129,7 @@ static int pci_configure_afu(struct cxl_afu *afu, struct cxl *adapter, struct pc
if ((rc = cxl_native_register_psl_irq(afu)))
goto err2;
+ up_write(&afu->configured_rwsem);
return 0;
err2:
@@ -1141,6 +1142,7 @@ err1:
static void pci_deconfigure_afu(struct cxl_afu *afu)
{
+ down_write(&afu->configured_rwsem);
cxl_native_release_psl_irq(afu);
if (afu->adapter->native->sl_ops->release_serr_irq)
afu->adapter->native->sl_ops->release_serr_irq(afu);
@@ -1610,6 +1612,9 @@ static void cxl_pci_remove_adapter(struct cxl *adapter)
cxl_sysfs_adapter_remove(adapter);
cxl_debugfs_adapter_remove(adapter);
+ /* Flush adapter datacache as its about to be removed */
+ cxl_data_cache_flush(adapter);
+
cxl_deconfigure_adapter(adapter);
device_unregister(&adapter->dev);
diff --git a/drivers/misc/cxl/vphb.c b/drivers/misc/cxl/vphb.c
index 3519acebfdab..639a343b7836 100644
--- a/drivers/misc/cxl/vphb.c
+++ b/drivers/misc/cxl/vphb.c
@@ -76,23 +76,22 @@ static int cxl_pcie_cfg_record(u8 bus, u8 devfn)
return (bus << 8) + devfn;
}
-static int cxl_pcie_config_info(struct pci_bus *bus, unsigned int devfn,
- struct cxl_afu **_afu, int *_record)
+static inline struct cxl_afu *pci_bus_to_afu(struct pci_bus *bus)
{
- struct pci_controller *phb;
- struct cxl_afu *afu;
- int record;
+ struct pci_controller *phb = bus ? pci_bus_to_host(bus) : NULL;
- phb = pci_bus_to_host(bus);
- if (phb == NULL)
- return PCIBIOS_DEVICE_NOT_FOUND;
+ return phb ? phb->private_data : NULL;
+}
+
+static inline int cxl_pcie_config_info(struct pci_bus *bus, unsigned int devfn,
+ struct cxl_afu *afu, int *_record)
+{
+ int record;
- afu = (struct cxl_afu *)phb->private_data;
record = cxl_pcie_cfg_record(bus->number, devfn);
if (record > afu->crs_num)
return PCIBIOS_DEVICE_NOT_FOUND;
- *_afu = afu;
*_record = record;
return 0;
}
@@ -106,9 +105,14 @@ static int cxl_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
u16 val16;
u32 val32;
- rc = cxl_pcie_config_info(bus, devfn, &afu, &record);
+ afu = pci_bus_to_afu(bus);
+ /* Grab a reader lock on afu. */
+ if (afu == NULL || !down_read_trylock(&afu->configured_rwsem))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ rc = cxl_pcie_config_info(bus, devfn, afu, &record);
if (rc)
- return rc;
+ goto out;
switch (len) {
case 1:
@@ -127,10 +131,9 @@ static int cxl_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
WARN_ON(1);
}
- if (rc)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
+out:
+ up_read(&afu->configured_rwsem);
+ return rc ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
}
static int cxl_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
@@ -139,9 +142,14 @@ static int cxl_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
int rc, record;
struct cxl_afu *afu;
- rc = cxl_pcie_config_info(bus, devfn, &afu, &record);
+ afu = pci_bus_to_afu(bus);
+ /* Grab a reader lock on afu. */
+ if (afu == NULL || !down_read_trylock(&afu->configured_rwsem))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ rc = cxl_pcie_config_info(bus, devfn, afu, &record);
if (rc)
- return rc;
+ goto out;
switch (len) {
case 1:
@@ -157,10 +165,9 @@ static int cxl_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
WARN_ON(1);
}
- if (rc)
- return PCIBIOS_SET_FAILED;
-
- return PCIBIOS_SUCCESSFUL;
+out:
+ up_read(&afu->configured_rwsem);
+ return rc ? PCIBIOS_SET_FAILED : PCIBIOS_SUCCESSFUL;
}
static struct pci_ops cxl_pcie_pci_ops =
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 04:11:45 +0000