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/*
* Copyright (c) 2012-2014 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include "wil6210.h"
static int use_msi = 1;
module_param(use_msi, int, S_IRUGO);
MODULE_PARM_DESC(use_msi,
" Use MSI interrupt: "
"0 - don't, 1 - (default) - single, or 3");
static bool debug_fw; /* = false; */
module_param(debug_fw, bool, S_IRUGO);
MODULE_PARM_DESC(debug_fw, " load driver if FW not ready. For FW debug");
static
void wil_set_capabilities(struct wil6210_priv *wil)
{
u32 rev_id = ioread32(wil->csr + HOSTADDR(RGF_USER_JTAG_DEV_ID));
bitmap_zero(wil->hw_capabilities, hw_capability_last);
switch (rev_id) {
case JTAG_DEV_ID_SPARROW_B0:
wil->hw_name = "Sparrow B0";
wil->hw_version = HW_VER_SPARROW_B0;
break;
default:
wil_err(wil, "Unknown board hardware 0x%08x\n", rev_id);
wil->hw_name = "Unknown";
wil->hw_version = HW_VER_UNKNOWN;
}
wil_info(wil, "Board hardware is %s\n", wil->hw_name);
}
void wil_disable_irq(struct wil6210_priv *wil)
{
int irq = wil->pdev->irq;
disable_irq(irq);
if (wil->n_msi == 3) {
disable_irq(irq + 1);
disable_irq(irq + 2);
}
}
void wil_enable_irq(struct wil6210_priv *wil)
{
int irq = wil->pdev->irq;
enable_irq(irq);
if (wil->n_msi == 3) {
enable_irq(irq + 1);
enable_irq(irq + 2);
}
}
/* Bus ops */
static int wil_if_pcie_enable(struct wil6210_priv *wil)
{
struct pci_dev *pdev = wil->pdev;
int rc;
/* on platforms with buggy ACPI, pdev->msi_enabled may be set to
* allow pci_enable_device to work. This indicates INTx was not routed
* and only MSI should be used
*/
int msi_only = pdev->msi_enabled;
wil_dbg_misc(wil, "%s()\n", __func__);
pdev->msi_enabled = 0;
pci_set_master(pdev);
/*
* how many MSI interrupts to request?
*/
switch (use_msi) {
case 3:
case 1:
wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi);
break;
case 0:
wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n");
break;
default:
wil_err(wil, "Invalid use_msi=%d, default to 1\n", use_msi);
use_msi = 1;
}
if (use_msi == 3 && pci_enable_msi_range(pdev, 3, 3) < 0) {
wil_err(wil, "3 MSI mode failed, try 1 MSI\n");
use_msi = 1;
}
if (use_msi == 1 && pci_enable_msi(pdev)) {
wil_err(wil, "pci_enable_msi failed, use INTx\n");
use_msi = 0;
}
wil->n_msi = use_msi;
if ((wil->n_msi == 0) && msi_only) {
wil_err(wil, "Interrupt pin not routed, unable to use INTx\n");
rc = -ENODEV;
goto stop_master;
}
rc = wil6210_init_irq(wil, pdev->irq);
if (rc)
goto stop_master;
/* need reset here to obtain MAC */
mutex_lock(&wil->mutex);
rc = wil_reset(wil, false);
mutex_unlock(&wil->mutex);
if (debug_fw)
rc = 0;
if (rc)
goto release_irq;
return 0;
release_irq:
wil6210_fini_irq(wil, pdev->irq);
/* safe to call if no MSI */
pci_disable_msi(pdev);
stop_master:
pci_clear_master(pdev);
return rc;
}
static int wil_if_pcie_disable(struct wil6210_priv *wil)
{
struct pci_dev *pdev = wil->pdev;
wil_dbg_misc(wil, "%s()\n", __func__);
pci_clear_master(pdev);
/* disable and release IRQ */
wil6210_fini_irq(wil, pdev->irq);
/* safe to call if no MSI */
pci_disable_msi(pdev);
/* TODO: disable HW */
return 0;
}
static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct wil6210_priv *wil;
struct device *dev = &pdev->dev;
void __iomem *csr;
int rc;
/* check HW */
dev_info(&pdev->dev, WIL_NAME
" device found [%04x:%04x] (rev %x)\n",
(int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) {
dev_err(&pdev->dev, "Not " WIL_NAME "? "
"BAR0 size is %lu while expecting %lu\n",
(ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE);
return -ENODEV;
}
rc = pci_enable_device(pdev);
if (rc) {
dev_err(&pdev->dev,
"pci_enable_device failed, retry with MSI only\n");
/* Work around for platforms that can't allocate IRQ:
* retry with MSI only
*/
pdev->msi_enabled = 1;
rc = pci_enable_device(pdev);
}
if (rc)
return -ENODEV;
/* rollback to err_disable_pdev */
rc = pci_request_region(pdev, 0, WIL_NAME);
if (rc) {
dev_err(&pdev->dev, "pci_request_region failed\n");
goto err_disable_pdev;
}
/* rollback to err_release_reg */
csr = pci_ioremap_bar(pdev, 0);
if (!csr) {
dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
rc = -ENODEV;
goto err_release_reg;
}
/* rollback to err_iounmap */
dev_info(&pdev->dev, "CSR at %pR -> 0x%p\n", &pdev->resource[0], csr);
wil = wil_if_alloc(dev, csr);
if (IS_ERR(wil)) {
rc = (int)PTR_ERR(wil);
dev_err(dev, "wil_if_alloc failed: %d\n", rc);
goto err_iounmap;
}
/* rollback to if_free */
pci_set_drvdata(pdev, wil);
wil->pdev = pdev;
wil_set_capabilities(wil);
wil6210_clear_irq(wil);
wil->platform_handle =
wil_platform_init(&pdev->dev, &wil->platform_ops);
/* FW should raise IRQ when ready */
rc = wil_if_pcie_enable(wil);
if (rc) {
wil_err(wil, "Enable device failed\n");
goto if_free;
}
/* rollback to bus_disable */
rc = wil_if_add(wil);
if (rc) {
wil_err(wil, "wil_if_add failed: %d\n", rc);
goto bus_disable;
}
wil6210_debugfs_init(wil);
return 0;
bus_disable:
wil_if_pcie_disable(wil);
if_free:
if (wil->platform_ops.uninit)
wil->platform_ops.uninit(wil->platform_handle);
wil_if_free(wil);
err_iounmap:
pci_iounmap(pdev, csr);
err_release_reg:
pci_release_region(pdev, 0);
err_disable_pdev:
pci_disable_device(pdev);
return rc;
}
static void wil_pcie_remove(struct pci_dev *pdev)
{
struct wil6210_priv *wil = pci_get_drvdata(pdev);
void __iomem *csr = wil->csr;
wil_dbg_misc(wil, "%s()\n", __func__);
wil6210_debugfs_remove(wil);
wil_if_remove(wil);
wil_if_pcie_disable(wil);
if (wil->platform_ops.uninit)
wil->platform_ops.uninit(wil->platform_handle);
wil_if_free(wil);
pci_iounmap(pdev, csr);
pci_release_region(pdev, 0);
pci_disable_device(pdev);
}
static const struct pci_device_id wil6210_pcie_ids[] = {
{ PCI_DEVICE(0x1ae9, 0x0310) },
{ PCI_DEVICE(0x1ae9, 0x0302) }, /* same as above, firmware broken */
{ /* end: all zeroes */ },
};
MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
static struct pci_driver wil6210_driver = {
.probe = wil_pcie_probe,
.remove = wil_pcie_remove,
.id_table = wil6210_pcie_ids,
.name = WIL_NAME,
};
module_pci_driver(wil6210_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>");
MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card");
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