diff options
| author | Russell Hu <rhu@qti.qualcomm.com> | 2018-01-16 12:43:47 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-01-16 17:29:22 +0300 |
| commit | 7368160f0ab0b1c2c9d95fc52dca1e7ec62201a4 (patch) | |
| tree | 671fa35decb0394d7d4aaf104572791ed5595b40 /drivers/net/wireless/ath/ath9k/pci.c | |
| parent | 79d891c1bbb6573cef31dbc2030fba61cfa1df6d (diff) | |
| download | linux-7368160f0ab0b1c2c9d95fc52dca1e7ec62201a4.tar.xz | |
ath9k: add MSI support
On new Intel platforms like ApolloLake, legacy interrupt mechanism
(INTx) is not supported, so WLAN modules are not working because
interrupts are missing, therefore this patch is to add MSI support to
ath9k. With module paremeter "use_msi=1", ath9k driver would try to
use MSI instead of INTx.
Signed-off-by: Russell Hu <rhu@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/pci.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/pci.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c index 223606311261..645f0fbd9179 100644 --- a/drivers/net/wireless/ath/ath9k/pci.c +++ b/drivers/net/wireless/ath/ath9k/pci.c @@ -22,6 +22,8 @@ #include <linux/module.h> #include "ath9k.h" +extern int ath9k_use_msi; + static const struct pci_device_id ath_pci_id_table[] = { { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI */ { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */ @@ -889,6 +891,7 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) u32 val; int ret = 0; char hw_name[64]; + int msi_enabled = 0; if (pcim_enable_device(pdev)) return -EIO; @@ -960,7 +963,20 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) sc->mem = pcim_iomap_table(pdev)[0]; sc->driver_data = id->driver_data; - ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc); + if (ath9k_use_msi) { + if (pci_enable_msi(pdev) == 0) { + msi_enabled = 1; + dev_err(&pdev->dev, "Using MSI\n"); + } else { + dev_err(&pdev->dev, "Using INTx\n"); + } + } + + if (!msi_enabled) + ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc); + else + ret = request_irq(pdev->irq, ath_isr, 0, "ath9k", sc); + if (ret) { dev_err(&pdev->dev, "request_irq failed\n"); goto err_irq; @@ -974,6 +990,9 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) goto err_init; } + sc->sc_ah->msi_enabled = msi_enabled; + sc->sc_ah->msi_reg = 0; + ath9k_hw_name(sc->sc_ah, hw_name, sizeof(hw_name)); wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", hw_name, (unsigned long)sc->mem, pdev->irq); |