diff options
Diffstat (limited to 'sound/pci/asihpi/hpioctl.c')
| -rw-r--r-- | sound/pci/asihpi/hpioctl.c | 126 |
1 files changed, 115 insertions, 11 deletions
diff --git a/sound/pci/asihpi/hpioctl.c b/sound/pci/asihpi/hpioctl.c index 7f0272032fbb..6aa677e60555 100644 --- a/sound/pci/asihpi/hpioctl.c +++ b/sound/pci/asihpi/hpioctl.c @@ -1,7 +1,8 @@ /******************************************************************************* - AudioScience HPI driver - Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com> + Common Linux HPI ioctl and module probe/remove functions + + Copyright (C) 1997-2014 AudioScience Inc. <support@audioscience.com> This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as @@ -12,11 +13,6 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -Common Linux HPI ioctl and module probe/remove functions *******************************************************************************/ #define SOURCEFILE_NAME "hpioctl.c" @@ -29,6 +25,7 @@ Common Linux HPI ioctl and module probe/remove functions #include "hpicmn.h" #include <linux/fs.h> +#include <linux/interrupt.h> #include <linux/slab.h> #include <linux/moduleparam.h> #include <asm/uaccess.h> @@ -307,10 +304,38 @@ out: return err; } +static int asihpi_irq_count; + +static irqreturn_t asihpi_isr(int irq, void *dev_id) +{ + struct hpi_adapter *a = dev_id; + int handled; + + if (!a->adapter->irq_query_and_clear) { + pr_err("asihpi_isr ASI%04X:%d no handler\n", a->adapter->type, + a->adapter->index); + return IRQ_NONE; + } + + handled = a->adapter->irq_query_and_clear(a->adapter, 0); + + if (!handled) + return IRQ_NONE; + + asihpi_irq_count++; + /* printk(KERN_INFO "asihpi_isr %d ASI%04X:%d irq handled\n", + asihpi_irq_count, a->adapter->type, a->adapter->index); */ + + if (a->interrupt_callback) + a->interrupt_callback(a); + + return IRQ_HANDLED; +} + int asihpi_adapter_probe(struct pci_dev *pci_dev, const struct pci_device_id *pci_id) { - int idx, nm; + int idx, nm, low_latency_mode = 0, irq_supported = 0; int adapter_index; unsigned int memlen; struct hpi_message hm; @@ -388,8 +413,38 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev, hm.adapter_index = adapter.adapter->index; hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); - if (hr.error) + if (hr.error) { + HPI_DEBUG_LOG(ERROR, "HPI_ADAPTER_OPEN failed, aborting\n"); goto err; + } + + /* Check if current mode == Low Latency mode */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_GET_MODE); + hm.adapter_index = adapter.adapter->index; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + + if (!hr.error + && hr.u.ax.mode.adapter_mode == HPI_ADAPTER_MODE_LOW_LATENCY) + low_latency_mode = 1; + else + dev_info(&pci_dev->dev, + "Adapter at index %d is not in low latency mode\n", + adapter.adapter->index); + + /* Check if IRQs are supported */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_GET_PROPERTY); + hm.adapter_index = adapter.adapter->index; + hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_SUPPORTS_IRQ; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + if (hr.error || !hr.u.ax.property_get.parameter1) { + dev_info(&pci_dev->dev, + "IRQs not supported by adapter at index %d\n", + adapter.adapter->index); + } else { + irq_supported = 1; + } /* WARNING can't init mutex in 'adapter' * and then copy it to adapters[] ?!?! @@ -398,6 +453,44 @@ int asihpi_adapter_probe(struct pci_dev *pci_dev, mutex_init(&adapters[adapter_index].mutex); pci_set_drvdata(pci_dev, &adapters[adapter_index]); + if (low_latency_mode && irq_supported) { + if (!adapter.adapter->irq_query_and_clear) { + dev_err(&pci_dev->dev, + "no IRQ handler for adapter %d, aborting\n", + adapter.adapter->index); + goto err; + } + + /* Disable IRQ generation on DSP side by setting the rate to 0 */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_SET_PROPERTY); + hm.adapter_index = adapter.adapter->index; + hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE; + hm.u.ax.property_set.parameter1 = 0; + hm.u.ax.property_set.parameter2 = 0; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + if (hr.error) { + HPI_DEBUG_LOG(ERROR, + "HPI_ADAPTER_GET_MODE failed, aborting\n"); + goto err; + } + + /* Note: request_irq calls asihpi_isr here */ + if (request_irq(pci_dev->irq, asihpi_isr, IRQF_SHARED, + "asihpi", &adapters[adapter_index])) { + dev_err(&pci_dev->dev, "request_irq(%d) failed\n", + pci_dev->irq); + goto err; + } + + adapters[adapter_index].interrupt_mode = 1; + + dev_info(&pci_dev->dev, "using irq %d\n", pci_dev->irq); + adapters[adapter_index].irq = pci_dev->irq; + } else { + dev_info(&pci_dev->dev, "using polled mode\n"); + } + dev_info(&pci_dev->dev, "probe succeeded for ASI%04X HPI index %d\n", adapter.adapter->type, adapter_index); @@ -431,6 +524,15 @@ void asihpi_adapter_remove(struct pci_dev *pci_dev) pa = pci_get_drvdata(pci_dev); pci = pa->adapter->pci; + /* Disable IRQ generation on DSP side */ + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, + HPI_ADAPTER_SET_PROPERTY); + hm.adapter_index = pa->adapter->index; + hm.u.ax.property_set.property = HPI_ADAPTER_PROPERTY_IRQ_RATE; + hm.u.ax.property_set.parameter1 = 0; + hm.u.ax.property_set.parameter2 = 0; + hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL); + hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER, HPI_ADAPTER_DELETE); hm.adapter_index = pa->adapter->index; @@ -442,8 +544,10 @@ void asihpi_adapter_remove(struct pci_dev *pci_dev) iounmap(pci.ap_mem_base[idx]); } - if (pa->p_buffer) - vfree(pa->p_buffer); + if (pa->irq) + free_irq(pa->irq, pa); + + vfree(pa->p_buffer); if (1) dev_info(&pci_dev->dev, |