--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ATH9K Fixup Driver
+ *
+ * Copyright (C) 2020 Álvaro Fernández Rojas <noltari@gmail.com>
+ * Copyright (C) 2014 Jonas Gorski <jonas.gorski@gmail.com>
+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ * Copyright (C) 2008 Florian Fainelli <f.fainelli@gmail.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mtd/mtd.h>
+#include <linux/of_net.h>
+#include <linux/of_platform.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include <linux/ath9k_platform.h>
+
+#define ATH9K_MAX_FIXUPS 2
+
+#define ATH9K_DEF_LED_PIN -1
+#define ATH9K_DEF_PCI_DEV 255
+
+struct ath9k_fixup {
+ struct device *dev;
+ struct resource *mem_res;
+ u32 pci_dev;
+ u8 mac[ETH_ALEN];
+ struct ath9k_platform_data pdata;
+};
+
+static int ath9k_num_fixups;
+static struct ath9k_fixup *ath9k_fixups[ATH9K_MAX_FIXUPS];
+
+static void ath9k_pci_fixup(struct pci_dev *dev)
+{
+ void __iomem *mem;
+ struct ath9k_fixup *priv = NULL;
+ struct ath9k_platform_data *pdata = NULL;
+ struct pci_dev *bridge = pci_upstream_bridge(dev);
+ u16 *cal_data = NULL;
+ u16 cmd;
+ u32 bar0;
+ u32 val;
+ unsigned i;
+
+ for (i = 0; i < ath9k_num_fixups; i++) {
+ if (ath9k_fixups[i]->pci_dev != PCI_SLOT(dev->devfn))
+ continue;
+
+ priv = ath9k_fixups[i];
+ cal_data = priv->pdata.eeprom_data;
+ pdata = &priv->pdata;
+ break;
+ }
+
+ if (cal_data == NULL)
+ return;
+
+ if (*cal_data != 0xa55a) {
+ pr_err("pci %s: invalid calibration data\n", pci_name(dev));
+ return;
+ }
+
+ pr_info("pci %s: fixup device configuration\n", pci_name(dev));
+
+ val = priv->mem_res->start;
+ mem = ioremap(priv->mem_res->start, resource_size(priv->mem_res));
+ if (!mem) {
+ pr_err("pci %s: ioremap error\n", pci_name(dev));
+ return;
+ }
+
+ if (bridge)
+ pci_enable_device(bridge);
+
+ pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
+ pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, val);
+
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+ /* set offset to first reg address */
+ cal_data += 3;
+ while(*cal_data != 0xffff) {
+ u32 reg;
+
+ reg = *cal_data++;
+ val = *cal_data++;
+ val |= (*cal_data++) << 16;
+
+ writel(val, mem + reg);
+ udelay(100);
+ }
+
+ pci_read_config_dword(dev, PCI_VENDOR_ID, &val);
+ dev->vendor = val & 0xffff;
+ dev->device = (val >> 16) & 0xffff;
+
+ pci_read_config_dword(dev, PCI_CLASS_REVISION, &val);
+ dev->revision = val & 0xff;
+ dev->class = val >> 8; /* upper 3 bytes */
+
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ cmd &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+ pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
+
+ if (bridge)
+ pci_disable_device(bridge);
+
+ iounmap(mem);
+
+ dev->dev.platform_data = pdata;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath9k_pci_fixup);
+
+static int ath9k_mtd_eeprom(struct ath9k_fixup *priv)
+{
+ struct device *dev = priv->dev;
+ struct device_node *node = dev->of_node;
+ struct device_node *mtd_np = NULL;
+ struct mtd_info *the_mtd;
+ phandle phandle;
+ size_t eeprom_readlen;
+ const char *part;
+ const __be32 *list;
+ int ret, i;
+
+ list = of_get_property(node, "ath,eeprom", &i);
+ if (!list || (i != (2 * sizeof(*list))))
+ return -ENODEV;
+
+ phandle = be32_to_cpup(list++);
+ if (phandle)
+ mtd_np = of_find_node_by_phandle(phandle);
+ if (!mtd_np)
+ return -ENODEV;
+
+ part = of_get_property(mtd_np, "label", NULL);
+ if (!part)
+ part = mtd_np->name;
+
+ the_mtd = get_mtd_device_nm(part);
+ if (IS_ERR(the_mtd))
+ return -ENODEV;
+
+ ret = mtd_read(the_mtd, be32_to_cpup(list),
+ ATH9K_PLAT_EEP_MAX_WORDS * sizeof(u16),
+ &eeprom_readlen, (void *) priv->pdata.eeprom_data);
+ put_mtd_device(the_mtd);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int ath9k_fixup_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ struct ath9k_fixup *priv;
+ struct resource *res;
+ const void *mac;
+ int ret;
+
+ if (ath9k_num_fixups >= ATH9K_MAX_FIXUPS)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->mem_res = res;
+
+ ret = of_property_read_u32(node, "pci-dev", &priv->pci_dev);
+ if (ret)
+ priv->pci_dev = ATH9K_DEF_PCI_DEV;
+
+ ret = ath9k_mtd_eeprom(priv);
+ if (ret)
+ return ret;
+
+ priv->pdata.endian_check = of_property_read_bool(node,
+ "ath,endian-check");
+ ret = of_property_read_s32(node, "ath,led-pin", &priv->pdata.led_pin);
+ if (ret)
+ priv->pdata.led_pin = ATH9K_DEF_LED_PIN;
+ priv->pdata.led_active_high = of_property_read_bool(node,
+ "ath,led-active-high");
+
+ mac = of_get_mac_address(node);
+ if (!IS_ERR_OR_NULL(mac)) {
+ memcpy(priv->mac, mac, ETH_ALEN);
+ dev_info(dev, "mtd mac %pM\n", priv->mac);
+ } else {
+ random_ether_addr(priv->mac);
+ dev_info(dev, "random mac %pM\n", priv->mac);
+ }
+
+ priv->pdata.macaddr = priv->mac;
+
+ ath9k_fixups[ath9k_num_fixups] = priv;
+ ath9k_num_fixups++;
+
+ return 0;
+}
+
+static const struct of_device_id ath9k_fixup_of_match[] = {
+ { .compatible = "brcm,ath9k-fixup" },
+ { /* sentinel */ }
+};
+
+static struct platform_driver ath9k_fixup_driver = {
+ .probe = ath9k_fixup_probe,
+ .driver = {
+ .name = "ath9k-fixup",
+ .of_match_table = ath9k_fixup_of_match,
+ },
+};
+
+int __init ath9k_fixup_init(void)
+{
+ int ret = platform_driver_register(&ath9k_fixup_driver);
+ if (ret)
+ pr_err("ath9k_fixup: Error registering platform driver!\n");
+ return ret;
+}
+late_initcall(ath9k_fixup_init);
projects / openwrt / staging / noltari.git / commitdiff