| /* |
| * Atheros AR913X/AR933X SoC built-in WMAC device support |
| * |
| * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com> |
| * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> |
| * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> |
| * |
| * Parts of this file are based on Atheros 2.6.15/2.6.31 BSP |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/irq.h> |
| #include <linux/etherdevice.h> |
| #include <linux/platform_device.h> |
| #include <linux/ath9k_platform.h> |
| |
| #include <asm/mach-ath79/ath79.h> |
| #include <asm/mach-ath79/ar71xx_regs.h> |
| #include "dev-wmac.h" |
| |
| #ifdef CONFIG_OF |
| #include <linux/of_platform.h> |
| #endif |
| |
| static u8 ath79_wmac_mac[ETH_ALEN]; |
| |
| struct ath9k_platform_data ath79_wmac_data = { |
| .led_pin = -1, |
| }; |
| |
| static struct resource ath79_wmac_resources[] = { |
| { |
| /* .start and .end fields are filled dynamically */ |
| .flags = IORESOURCE_MEM, |
| }, { |
| /* .start and .end fields are filled dynamically */ |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static struct platform_device ath79_wmac_device = { |
| .name = "ath9k", |
| .id = -1, |
| .resource = ath79_wmac_resources, |
| .num_resources = ARRAY_SIZE(ath79_wmac_resources), |
| .dev = { |
| .platform_data = &ath79_wmac_data, |
| }, |
| }; |
| |
| static void __init ar913x_wmac_setup(void) |
| { |
| /* reset the WMAC */ |
| ath79_device_reset_set(AR913X_RESET_AMBA2WMAC); |
| mdelay(10); |
| |
| ath79_device_reset_clear(AR913X_RESET_AMBA2WMAC); |
| mdelay(10); |
| |
| ath79_wmac_resources[0].start = AR913X_WMAC_BASE; |
| ath79_wmac_resources[0].end = AR913X_WMAC_BASE + AR913X_WMAC_SIZE - 1; |
| ath79_wmac_resources[1].start = ATH79_CPU_IRQ_IP2; |
| ath79_wmac_resources[1].end = ATH79_CPU_IRQ_IP2; |
| } |
| |
| |
| static int ar933x_wmac_reset(void) |
| { |
| int retries = 20; |
| |
| ath79_device_reset_set(AR933X_RESET_WMAC); |
| ath79_device_reset_clear(AR933X_RESET_WMAC); |
| |
| while (1) { |
| u32 bootstrap; |
| |
| bootstrap = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP); |
| if ((bootstrap & AR933X_BOOTSTRAP_EEPBUSY) == 0) |
| return 0; |
| |
| if (retries-- == 0) |
| break; |
| |
| udelay(10000); |
| retries++; |
| } |
| |
| pr_err("ar933x: WMAC reset timed out"); |
| return -ETIMEDOUT; |
| } |
| |
| static int ar93xx_get_soc_revision(void) |
| { |
| return ath79_soc_rev; |
| } |
| |
| static void __init ar933x_wmac_setup(void) |
| { |
| u32 t; |
| |
| ar933x_wmac_reset(); |
| |
| ath79_wmac_device.name = "ar933x_wmac"; |
| |
| ath79_wmac_resources[0].start = AR933X_WMAC_BASE; |
| ath79_wmac_resources[0].end = AR933X_WMAC_BASE + AR933X_WMAC_SIZE - 1; |
| ath79_wmac_resources[1].start = ATH79_CPU_IRQ_IP2; |
| ath79_wmac_resources[1].end = ATH79_CPU_IRQ_IP2; |
| |
| t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP); |
| if (t & AR933X_BOOTSTRAP_REF_CLK_40) |
| ath79_wmac_data.is_clk_25mhz = false; |
| else |
| ath79_wmac_data.is_clk_25mhz = true; |
| |
| if (ath79_soc_rev == 1) |
| ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision; |
| |
| ath79_wmac_data.external_reset = ar933x_wmac_reset; |
| } |
| |
| static void ar934x_wmac_setup(void) |
| { |
| u32 t; |
| |
| ath79_wmac_device.name = "ar934x_wmac"; |
| |
| ath79_wmac_resources[0].start = AR934X_WMAC_BASE; |
| ath79_wmac_resources[0].end = AR934X_WMAC_BASE + AR934X_WMAC_SIZE - 1; |
| ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); |
| ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); |
| |
| t = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP); |
| if (t & AR934X_BOOTSTRAP_REF_CLK_40) |
| ath79_wmac_data.is_clk_25mhz = false; |
| else |
| ath79_wmac_data.is_clk_25mhz = true; |
| } |
| |
| static void qca953x_wmac_setup(void) |
| { |
| u32 t; |
| |
| ath79_wmac_device.name = "qca953x_wmac"; |
| |
| ath79_wmac_resources[0].start = QCA953X_WMAC_BASE; |
| ath79_wmac_resources[0].end = QCA953X_WMAC_BASE + QCA953X_WMAC_SIZE - 1; |
| ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); |
| ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); |
| |
| t = ath79_reset_rr(QCA953X_RESET_REG_BOOTSTRAP); |
| if (t & QCA953X_BOOTSTRAP_REF_CLK_40) |
| ath79_wmac_data.is_clk_25mhz = false; |
| else |
| ath79_wmac_data.is_clk_25mhz = true; |
| |
| ath79_wmac_data.get_mac_revision = ar93xx_get_soc_revision; |
| } |
| |
| static void qca955x_wmac_setup(void) |
| { |
| u32 t; |
| |
| ath79_wmac_device.name = "qca955x_wmac"; |
| |
| ath79_wmac_resources[0].start = QCA955X_WMAC_BASE; |
| ath79_wmac_resources[0].end = QCA955X_WMAC_BASE + QCA955X_WMAC_SIZE - 1; |
| ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); |
| ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); |
| |
| t = ath79_reset_rr(QCA955X_RESET_REG_BOOTSTRAP); |
| if (t & QCA955X_BOOTSTRAP_REF_CLK_40) |
| ath79_wmac_data.is_clk_25mhz = false; |
| else |
| ath79_wmac_data.is_clk_25mhz = true; |
| } |
| |
| static void qca956x_wmac_setup(void) |
| { |
| u32 t; |
| |
| ath79_wmac_device.name = "qca956x_wmac"; |
| |
| ath79_wmac_resources[0].start = QCA956X_WMAC_BASE; |
| ath79_wmac_resources[0].end = QCA956X_WMAC_BASE + QCA956X_WMAC_SIZE - 1; |
| ath79_wmac_resources[1].start = ATH79_IP2_IRQ(1); |
| ath79_wmac_resources[1].end = ATH79_IP2_IRQ(1); |
| |
| t = ath79_reset_rr(QCA956X_RESET_REG_BOOTSTRAP); |
| if (t & QCA956X_BOOTSTRAP_REF_CLK_40) |
| ath79_wmac_data.is_clk_25mhz = false; |
| else |
| ath79_wmac_data.is_clk_25mhz = true; |
| } |
| |
| static bool __init |
| ar93xx_wmac_otp_read_word(void __iomem *base, int addr, u32 *data) |
| { |
| int timeout = 1000; |
| u32 val; |
| |
| __raw_readl(base + AR9300_OTP_BASE + (4 * addr)); |
| while (timeout--) { |
| val = __raw_readl(base + AR9300_OTP_STATUS); |
| if ((val & AR9300_OTP_STATUS_TYPE) == AR9300_OTP_STATUS_VALID) |
| break; |
| |
| udelay(10); |
| } |
| |
| if (!timeout) |
| return false; |
| |
| *data = __raw_readl(base + AR9300_OTP_READ_DATA); |
| return true; |
| } |
| |
| static bool __init |
| ar93xx_wmac_otp_read(void __iomem *base, int addr, u8 *dest, int len) |
| { |
| u32 data; |
| int i; |
| |
| for (i = 0; i < len; i++) { |
| int offset = 8 * ((addr - i) % 4); |
| |
| if (!ar93xx_wmac_otp_read_word(base, (addr - i) / 4, &data)) |
| return false; |
| |
| dest[i] = (data >> offset) & 0xff; |
| } |
| |
| return true; |
| } |
| |
| static bool __init |
| ar93xx_wmac_otp_uncompress(void __iomem *base, int addr, int len, u8 *dest, |
| int dest_start, int dest_len) |
| { |
| int dest_bytes = 0; |
| int offset = 0; |
| int end = addr - len; |
| u8 hdr[2]; |
| |
| while (addr > end) { |
| if (!ar93xx_wmac_otp_read(base, addr, hdr, 2)) |
| return false; |
| |
| addr -= 2; |
| offset += hdr[0]; |
| |
| if (offset <= dest_start + dest_len && |
| offset + len >= dest_start) { |
| int data_offset = 0; |
| int dest_offset = 0; |
| int copy_len; |
| |
| if (offset < dest_start) |
| data_offset = dest_start - offset; |
| else |
| dest_offset = offset - dest_start; |
| |
| copy_len = len - data_offset; |
| if (copy_len > dest_len - dest_offset) |
| copy_len = dest_len - dest_offset; |
| |
| ar93xx_wmac_otp_read(base, addr - data_offset, |
| dest + dest_offset, |
| copy_len); |
| |
| dest_bytes += copy_len; |
| } |
| addr -= hdr[1]; |
| } |
| return !!dest_bytes; |
| } |
| |
| bool __init ar93xx_wmac_read_mac_address(u8 *dest) |
| { |
| void __iomem *base; |
| bool ret = false; |
| int addr = 0x1ff; |
| unsigned int len; |
| u32 hdr_u32; |
| u8 *hdr = (u8 *) &hdr_u32; |
| u8 mac[6] = { 0x00, 0x02, 0x03, 0x04, 0x05, 0x06 }; |
| int mac_start = 2, mac_end = 8; |
| |
| BUG_ON(!soc_is_ar933x() && !soc_is_ar934x() && !soc_is_qca953x()); |
| base = ioremap_nocache(AR933X_WMAC_BASE, AR933X_WMAC_SIZE); |
| while (addr > sizeof(hdr)) { |
| if (!ar93xx_wmac_otp_read(base, addr, hdr, sizeof(hdr))) |
| break; |
| |
| if (hdr_u32 == 0 || hdr_u32 == ~0) |
| break; |
| |
| len = (hdr[1] << 4) | (hdr[2] >> 4); |
| addr -= 4; |
| |
| switch (hdr[0] >> 5) { |
| case 0: |
| if (len < mac_end) |
| break; |
| |
| ar93xx_wmac_otp_read(base, addr - mac_start, mac, 6); |
| ret = true; |
| break; |
| case 3: |
| ret |= ar93xx_wmac_otp_uncompress(base, addr, len, mac, |
| mac_start, 6); |
| break; |
| default: |
| break; |
| } |
| |
| addr -= len + 2; |
| } |
| |
| iounmap(base); |
| if (ret) |
| memcpy(dest, mac, 6); |
| |
| return ret; |
| } |
| |
| void __init ath79_wmac_disable_2ghz(void) |
| { |
| ath79_wmac_data.disable_2ghz = true; |
| } |
| |
| void __init ath79_wmac_disable_5ghz(void) |
| { |
| ath79_wmac_data.disable_5ghz = true; |
| } |
| |
| __init struct ath9k_platform_data *ath79_get_wmac_data(void) |
| { |
| return &ath79_wmac_data; |
| } |
| |
| void ath79_init_wmac_pdata(u8 *cal_data, u8 *mac_addr) |
| { |
| if (soc_is_ar913x()) |
| ar913x_wmac_setup(); |
| else if (soc_is_ar933x()) |
| ar933x_wmac_setup(); |
| else if (soc_is_ar934x()) |
| ar934x_wmac_setup(); |
| else if (soc_is_qca953x()) |
| qca953x_wmac_setup(); |
| else if (soc_is_qca955x()) |
| qca955x_wmac_setup(); |
| else if (soc_is_qca956x()) |
| qca956x_wmac_setup(); |
| else |
| BUG(); |
| |
| if (cal_data) |
| memcpy(ath79_wmac_data.eeprom_data, cal_data, |
| sizeof(ath79_wmac_data.eeprom_data)); |
| |
| if (mac_addr) { |
| memcpy(ath79_wmac_mac, mac_addr, sizeof(ath79_wmac_mac)); |
| ath79_wmac_data.macaddr = ath79_wmac_mac; |
| } |
| } |
| |
| #ifdef CONFIG_OF |
| void ath79_wmac_dt_fixup(void *auxdata) |
| { |
| struct of_dev_auxdata *of_auxdata = (struct of_dev_auxdata *)auxdata; |
| of_auxdata->name = (char *)ath79_wmac_device.name; |
| of_auxdata->phys_addr = ath79_wmac_resources[0].start; |
| } |
| #else |
| void ath79_wmac_dt_fixup(void *auxdata) {} |
| #endif |
| |
| void __init ath79_register_wmac(u8 *cal_data, u8 *mac_addr) |
| { |
| ath79_init_wmac_pdata(cal_data, mac_addr); |
| platform_device_register(&ath79_wmac_device); |
| } |