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path: root/drivers/uwb/whc-rc.c
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Diffstat (limited to 'drivers/uwb/whc-rc.c')
-rw-r--r--drivers/uwb/whc-rc.c118
1 files changed, 39 insertions, 79 deletions
diff --git a/drivers/uwb/whc-rc.c b/drivers/uwb/whc-rc.c
index 1711deadb114..19a1dd129212 100644
--- a/drivers/uwb/whc-rc.c
+++ b/drivers/uwb/whc-rc.c
@@ -39,7 +39,6 @@
* them to the hw and transfer the replies/notifications back to the
* UWB stack through the UWB daemon (UWBD).
*/
-#include <linux/version.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
@@ -49,10 +48,8 @@
#include <linux/uwb.h>
#include <linux/uwb/whci.h>
#include <linux/uwb/umc.h>
-#include "uwb-internal.h"
-#define D_LOCAL 0
-#include <linux/uwb/debug.h>
+#include "uwb-internal.h"
/**
* Descriptor for an instance of the UWB Radio Control Driver that
@@ -98,13 +95,8 @@ static int whcrc_cmd(struct uwb_rc *uwb_rc,
struct device *dev = &whcrc->umc_dev->dev;
u32 urccmd;
- d_fnstart(3, dev, "(%p, %p, %zu)\n", uwb_rc, cmd, cmd_size);
- might_sleep();
-
- if (cmd_size >= 4096) {
- result = -E2BIG;
- goto error;
- }
+ if (cmd_size >= 4096)
+ return -EINVAL;
/*
* If the URC is halted, then the hardware has reset itself.
@@ -115,16 +107,14 @@ static int whcrc_cmd(struct uwb_rc *uwb_rc,
if (le_readl(whcrc->rc_base + URCSTS) & URCSTS_HALTED) {
dev_err(dev, "requesting reset of halted radio controller\n");
uwb_rc_reset_all(uwb_rc);
- result = -EIO;
- goto error;
+ return -EIO;
}
result = wait_event_timeout(whcrc->cmd_wq,
!(le_readl(whcrc->rc_base + URCCMD) & URCCMD_ACTIVE), HZ/2);
if (result == 0) {
dev_err(dev, "device is not ready to execute commands\n");
- result = -ETIMEDOUT;
- goto error;
+ return -ETIMEDOUT;
}
memmove(whcrc->cmd_buf, cmd, cmd_size);
@@ -137,10 +127,7 @@ static int whcrc_cmd(struct uwb_rc *uwb_rc,
whcrc->rc_base + URCCMD);
spin_unlock(&whcrc->irq_lock);
-error:
- d_fnend(3, dev, "(%p, %p, %zu) = %d\n",
- uwb_rc, cmd, cmd_size, result);
- return result;
+ return 0;
}
static int whcrc_reset(struct uwb_rc *rc)
@@ -167,34 +154,25 @@ static int whcrc_reset(struct uwb_rc *rc)
static
void whcrc_enable_events(struct whcrc *whcrc)
{
- struct device *dev = &whcrc->umc_dev->dev;
u32 urccmd;
- d_fnstart(4, dev, "(whcrc %p)\n", whcrc);
-
le_writeq(whcrc->evt_dma_buf, whcrc->rc_base + URCEVTADDR);
spin_lock(&whcrc->irq_lock);
urccmd = le_readl(whcrc->rc_base + URCCMD) & ~URCCMD_ACTIVE;
le_writel(urccmd | URCCMD_EARV, whcrc->rc_base + URCCMD);
spin_unlock(&whcrc->irq_lock);
-
- d_fnend(4, dev, "(whcrc %p) = void\n", whcrc);
}
static void whcrc_event_work(struct work_struct *work)
{
struct whcrc *whcrc = container_of(work, struct whcrc, event_work);
- struct device *dev = &whcrc->umc_dev->dev;
size_t size;
u64 urcevtaddr;
urcevtaddr = le_readq(whcrc->rc_base + URCEVTADDR);
size = urcevtaddr & URCEVTADDR_OFFSET_MASK;
- d_printf(3, dev, "received %zu octet event\n", size);
- d_dump(4, dev, whcrc->evt_buf, size > 32 ? 32 : size);
-
uwb_rc_neh_grok(whcrc->uwb_rc, whcrc->evt_buf, size);
whcrc_enable_events(whcrc);
}
@@ -217,22 +195,15 @@ irqreturn_t whcrc_irq_cb(int irq, void *_whcrc)
return IRQ_NONE;
le_writel(urcsts & URCSTS_INT_MASK, whcrc->rc_base + URCSTS);
- d_printf(4, dev, "acked 0x%08x, urcsts 0x%08x\n",
- le_readl(whcrc->rc_base + URCSTS), urcsts);
-
if (urcsts & URCSTS_HSE) {
dev_err(dev, "host system error -- hardware halted\n");
/* FIXME: do something sensible here */
goto out;
}
- if (urcsts & URCSTS_ER) {
- d_printf(3, dev, "ER: event ready\n");
+ if (urcsts & URCSTS_ER)
schedule_work(&whcrc->event_work);
- }
- if (urcsts & URCSTS_RCI) {
- d_printf(3, dev, "RCI: ready to execute another command\n");
+ if (urcsts & URCSTS_RCI)
wake_up_all(&whcrc->cmd_wq);
- }
out:
return IRQ_HANDLED;
}
@@ -251,8 +222,7 @@ int whcrc_setup_rc_umc(struct whcrc *whcrc)
whcrc->area = umc_dev->resource.start;
whcrc->rc_len = umc_dev->resource.end - umc_dev->resource.start + 1;
result = -EBUSY;
- if (request_mem_region(whcrc->area, whcrc->rc_len, KBUILD_MODNAME)
- == NULL) {
+ if (request_mem_region(whcrc->area, whcrc->rc_len, KBUILD_MODNAME) == NULL) {
dev_err(dev, "can't request URC region (%zu bytes @ 0x%lx): %d\n",
whcrc->rc_len, whcrc->area, result);
goto error_request_region;
@@ -287,8 +257,6 @@ int whcrc_setup_rc_umc(struct whcrc *whcrc)
dev_err(dev, "Can't allocate evt transfer buffer\n");
goto error_evt_buffer;
}
- d_printf(3, dev, "UWB RC Interface: %zu bytes at 0x%p, irq %u\n",
- whcrc->rc_len, whcrc->rc_base, umc_dev->irq);
return 0;
error_evt_buffer:
@@ -333,47 +301,23 @@ void whcrc_release_rc_umc(struct whcrc *whcrc)
static int whcrc_start_rc(struct uwb_rc *rc)
{
struct whcrc *whcrc = rc->priv;
- int result = 0;
struct device *dev = &whcrc->umc_dev->dev;
- unsigned long start, duration;
/* Reset the thing */
le_writel(URCCMD_RESET, whcrc->rc_base + URCCMD);
- if (d_test(3))
- start = jiffies;
if (whci_wait_for(dev, whcrc->rc_base + URCCMD, URCCMD_RESET, 0,
- 5000, "device to reset at init") < 0) {
- result = -EBUSY;
- goto error;
- } else if (d_test(3)) {
- duration = jiffies - start;
- if (duration > msecs_to_jiffies(40))
- dev_err(dev, "Device took %ums to "
- "reset. MAX expected: 40ms\n",
- jiffies_to_msecs(duration));
- }
+ 5000, "hardware reset") < 0)
+ return -EBUSY;
/* Set the event buffer, start the controller (enable IRQs later) */
le_writel(0, whcrc->rc_base + URCINTR);
le_writel(URCCMD_RS, whcrc->rc_base + URCCMD);
- result = -ETIMEDOUT;
- if (d_test(3))
- start = jiffies;
if (whci_wait_for(dev, whcrc->rc_base + URCSTS, URCSTS_HALTED, 0,
- 5000, "device to start") < 0)
- goto error;
- if (d_test(3)) {
- duration = jiffies - start;
- if (duration > msecs_to_jiffies(40))
- dev_err(dev, "Device took %ums to start. "
- "MAX expected: 40ms\n",
- jiffies_to_msecs(duration));
- }
+ 5000, "radio controller start") < 0)
+ return -ETIMEDOUT;
whcrc_enable_events(whcrc);
- result = 0;
le_writel(URCINTR_EN_ALL, whcrc->rc_base + URCINTR);
-error:
- return result;
+ return 0;
}
@@ -395,7 +339,7 @@ void whcrc_stop_rc(struct uwb_rc *rc)
le_writel(0, whcrc->rc_base + URCCMD);
whci_wait_for(&umc_dev->dev, whcrc->rc_base + URCSTS,
- URCSTS_HALTED, 0, 40, "URCSTS.HALTED");
+ URCSTS_HALTED, URCSTS_HALTED, 100, "radio controller stop");
}
static void whcrc_init(struct whcrc *whcrc)
@@ -421,7 +365,6 @@ int whcrc_probe(struct umc_dev *umc_dev)
struct whcrc *whcrc;
struct device *dev = &umc_dev->dev;
- d_fnstart(3, dev, "(umc_dev %p)\n", umc_dev);
result = -ENOMEM;
uwb_rc = uwb_rc_alloc();
if (uwb_rc == NULL) {
@@ -453,7 +396,6 @@ int whcrc_probe(struct umc_dev *umc_dev)
if (result < 0)
goto error_rc_add;
umc_set_drvdata(umc_dev, whcrc);
- d_fnend(3, dev, "(umc_dev %p) = 0\n", umc_dev);
return 0;
error_rc_add:
@@ -463,7 +405,6 @@ error_setup_rc_umc:
error_alloc:
uwb_rc_put(uwb_rc);
error_rc_alloc:
- d_fnend(3, dev, "(umc_dev %p) = %d\n", umc_dev, result);
return result;
}
@@ -486,7 +427,24 @@ static void whcrc_remove(struct umc_dev *umc_dev)
whcrc_release_rc_umc(whcrc);
kfree(whcrc);
uwb_rc_put(uwb_rc);
- d_printf(1, &umc_dev->dev, "freed whcrc %p\n", whcrc);
+}
+
+static int whcrc_pre_reset(struct umc_dev *umc)
+{
+ struct whcrc *whcrc = umc_get_drvdata(umc);
+ struct uwb_rc *uwb_rc = whcrc->uwb_rc;
+
+ uwb_rc_pre_reset(uwb_rc);
+ return 0;
+}
+
+static int whcrc_post_reset(struct umc_dev *umc)
+{
+ struct whcrc *whcrc = umc_get_drvdata(umc);
+ struct uwb_rc *uwb_rc = whcrc->uwb_rc;
+
+ uwb_rc_post_reset(uwb_rc);
+ return 0;
}
/* PCI device ID's that we handle [so it gets loaded] */
@@ -497,10 +455,12 @@ static struct pci_device_id whcrc_id_table[] = {
MODULE_DEVICE_TABLE(pci, whcrc_id_table);
static struct umc_driver whcrc_driver = {
- .name = "whc-rc",
- .cap_id = UMC_CAP_ID_WHCI_RC,
- .probe = whcrc_probe,
- .remove = whcrc_remove,
+ .name = "whc-rc",
+ .cap_id = UMC_CAP_ID_WHCI_RC,
+ .probe = whcrc_probe,
+ .remove = whcrc_remove,
+ .pre_reset = whcrc_pre_reset,
+ .post_reset = whcrc_post_reset,
};
static int __init whcrc_driver_init(void)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 08:11:46 +0000