2 * Cisco Meraki MR18 board support
4 * Copyright (C) 2015 Chris Blake <chrisrblake93@gmail.com>
5 * Copyright (C) 2015 Christian Lamparter <chunkeey@googlemail.com>
6 * Copyright (C) 2015 Thomas Hebb <tommyhebb@gmail.com>
8 * Based on Cisco Meraki GPL Release r23-20150601 MR18 Device Config
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
14 #include <linux/platform_device.h>
15 #include <linux/ath9k_platform.h>
16 #include <linux/platform/ar934x_nfc.h>
17 #include <linux/platform_data/phy-at803x.h>
19 #include <asm/mach-ath79/ath79.h>
20 #include <asm/mach-ath79/ar71xx_regs.h>
22 #include <linux/leds-nu801.h>
23 #include <linux/pci.h>
28 #include "dev-gpio-buttons.h"
29 #include "dev-leds-gpio.h"
32 #include "machtypes.h"
34 #define MR18_GPIO_LED_POWER_WHITE 18
35 #define MR18_GPIO_LED_POWER_ORANGE 21
37 #define MR18_GPIO_BTN_RESET 17
38 #define MR18_KEYS_POLL_INTERVAL 20 /* msecs */
39 #define MR18_KEYS_DEBOUNCE_INTERVAL (3 * MR18_KEYS_POLL_INTERVAL)
41 #define MR18_WAN_PHYADDR 3
43 /* used for eth calibration */
44 #define MR18_OTP_BASE (AR71XX_APB_BASE + 0x130000)
45 #define MR18_OTP_SIZE (0x2000) /* just a guess */
46 #define MR18_OTP_MEM_0_REG (0x0000)
47 #define MR18_OTP_INTF2_REG (0x1008)
48 #define MR18_OTP_STATUS0_REG (0x1018)
49 #define MR18_OTP_STATUS0_EFUSE_VALID BIT(2)
51 #define MR18_OTP_STATUS1_REG (0x101c)
52 #define MR18_OTP_LDO_CTRL_REG (0x1024)
53 #define MR18_OTP_LDO_STATUS_REG (0x102c)
54 #define MR18_OTP_LDO_STATUS_POWER_ON BIT(0)
56 static struct gpio_led MR18_leds_gpio[] __initdata = {
58 .name = "mr18:white:power",
59 .gpio = MR18_GPIO_LED_POWER_WHITE,
62 .name = "mr18:orange:power",
63 .gpio = MR18_GPIO_LED_POWER_ORANGE,
68 static struct gpio_keys_button MR18_gpio_keys[] __initdata = {
73 .debounce_interval = MR18_KEYS_DEBOUNCE_INTERVAL,
74 .gpio = MR18_GPIO_BTN_RESET,
79 static struct led_nu801_template tricolor_led_template = {
80 .device_name = "mr18",
92 .default_trigger = "none",
93 .led_colors = { "red", "green", "blue" },
96 static struct led_nu801_platform_data tricolor_led_data = {
98 .template = &tricolor_led_template,
101 static struct platform_device tricolor_leds = {
102 .name = "leds-nu801",
104 .dev.platform_data = &tricolor_led_data,
107 static int mr18_extract_sgmii_res_cal(void)
110 unsigned int reversed_sgmii_value;
112 unsigned int otp_value, otp_per_val, rbias_per, read_data;
113 unsigned int rbias_pos_or_neg;
114 unsigned int sgmii_res_cal_value;
117 base = ioremap_nocache(MR18_OTP_BASE, MR18_OTP_SIZE);
121 __raw_writel(0x7d, base + MR18_OTP_INTF2_REG);
122 __raw_writel(0x00, base + MR18_OTP_LDO_CTRL_REG);
124 while (__raw_readl(base + MR18_OTP_LDO_STATUS_REG) &
125 MR18_OTP_LDO_STATUS_POWER_ON);
127 __raw_readl(base + MR18_OTP_MEM_0_REG + 4);
129 while (!(__raw_readl(base + MR18_OTP_STATUS0_REG) &
130 MR18_OTP_STATUS0_EFUSE_VALID));
132 read_data = __raw_readl(base + MR18_OTP_STATUS1_REG);
136 if (!(read_data & 0x1fff))
139 if (read_data & 0x00001000)
140 otp_value = (read_data & 0xfc0) >> 6;
142 otp_value = read_data & 0x3f;
144 if (otp_value > 31) {
145 otp_per_val = 63 - otp_value;
146 rbias_pos_or_neg = 1;
148 otp_per_val = otp_value;
149 rbias_pos_or_neg = 0;
152 rbias_per = otp_per_val * 15;
154 if (rbias_pos_or_neg == 1)
155 res_cal_val = (rbias_per + 34) / 21;
156 else if (rbias_per > 34)
157 res_cal_val = -((rbias_per - 34) / 21);
159 res_cal_val = (34 - rbias_per) / 21;
161 sgmii_res_cal_value = (8 + res_cal_val) & 0xf;
163 reversed_sgmii_value = (sgmii_res_cal_value & 8) >> 3;
164 reversed_sgmii_value |= (sgmii_res_cal_value & 4) >> 1;
165 reversed_sgmii_value |= (sgmii_res_cal_value & 2) << 1;
166 reversed_sgmii_value |= (sgmii_res_cal_value & 1) << 3;
167 printk(KERN_INFO "SGMII cal value = 0x%x\n", reversed_sgmii_value);
168 return reversed_sgmii_value;
171 #define QCA955X_PLL_ETH_SGMII_SERDES_REG 0x004c
172 #define QCA955X_PLL_ETH_SGMII_SERDES_LOCK_DETECT BIT(2)
173 #define QCA955X_PLL_ETH_SGMII_SERDES_PLL_REFCLK BIT(1)
174 #define QCA955X_PLL_ETH_SGMII_SERDES_EN_PLL BIT(0)
176 #define QCA955X_GMAC_REG_SGMII_SERDES 0x0018
177 #define QCA955X_SGMII_SERDES_RES_CALIBRATION BIT(23)
178 #define QCA955X_SGMII_SERDES_RES_CALIBRATION_MASK 0xf
179 #define QCA955X_SGMII_SERDES_RES_CALIBRATION_SHIFT 23
180 #define QCA955X_SGMII_SERDES_LOCK_DETECT_STATUS BIT(15)
182 static void mr18_setup_qca955x_eth_serdes_cal(unsigned int sgmii_value)
184 void __iomem *ethbase, *pllbase;
187 ethbase = ioremap_nocache(QCA955X_GMAC_BASE, QCA955X_GMAC_SIZE);
188 pllbase = ioremap_nocache(AR71XX_PLL_BASE, AR71XX_PLL_SIZE);
190 /* To Check the locking of the SGMII PLL */
191 t = __raw_readl(ethbase + QCA955X_GMAC_REG_SGMII_SERDES);
192 t &= ~(QCA955X_SGMII_SERDES_RES_CALIBRATION_MASK <<
193 QCA955X_SGMII_SERDES_RES_CALIBRATION_SHIFT);
194 t |= (sgmii_value & QCA955X_SGMII_SERDES_RES_CALIBRATION_MASK) <<
195 QCA955X_SGMII_SERDES_RES_CALIBRATION_SHIFT;
196 __raw_writel(t, ethbase + QCA955X_GMAC_REG_SGMII_SERDES);
198 __raw_writel(QCA955X_PLL_ETH_SGMII_SERDES_LOCK_DETECT |
199 QCA955X_PLL_ETH_SGMII_SERDES_PLL_REFCLK |
200 QCA955X_PLL_ETH_SGMII_SERDES_EN_PLL,
201 pllbase + QCA955X_PLL_ETH_SGMII_SERDES_REG);
203 ath79_device_reset_clear(QCA955X_RESET_SGMII_ANALOG);
204 ath79_device_reset_clear(QCA955X_RESET_SGMII);
206 while (!(__raw_readl(ethbase + QCA955X_GMAC_REG_SGMII_SERDES) &
207 QCA955X_SGMII_SERDES_LOCK_DETECT_STATUS));
213 static struct ath9k_platform_data pci_main_wifi_data = {
216 static struct ath9k_platform_data pci_scan_wifi_data = {
220 static int mr18_dual_pci_plat_dev_init(struct pci_dev *dev)
222 /* The PCIE devices are attached to different busses but they
223 * both share the same slot number. Checking the PCI_SLOT vals
226 switch (dev->bus->number) {
228 dev->dev.platform_data = &pci_main_wifi_data;
231 dev->dev.platform_data = &pci_scan_wifi_data;
238 static void __init mr18_setup(void)
243 ath79_nfc_set_ecc_mode(AR934X_NFC_ECC_SOFT_BCH);
244 ath79_register_nfc();
246 /* even though, the PHY is connected via RGMII,
247 * the SGMII/SERDES PLLs need to be calibrated and locked.
248 * Or else, the PHY won't be working for this platfrom.
250 * Figuring this out took such a long time, that we want to
251 * point this quirk out, before someone wants to remove it.
253 res = mr18_extract_sgmii_res_cal();
255 /* Setup SoC Eth Config */
256 ath79_setup_qca955x_eth_cfg(QCA955X_ETH_CFG_RGMII_EN |
257 (3 << QCA955X_ETH_CFG_RXD_DELAY_SHIFT) |
258 (3 << QCA955X_ETH_CFG_RDV_DELAY_SHIFT));
261 ath79_register_mdio(0, 0x0);
263 mr18_setup_qca955x_eth_serdes_cal(res);
265 /* GMAC0 is connected to an Atheros AR8035-A */
266 ath79_init_mac(ath79_eth0_data.mac_addr, NULL, 0);
267 ath79_eth0_data.mii_bus_dev = &ath79_mdio0_device.dev;
268 ath79_eth0_data.phy_if_mode = PHY_INTERFACE_MODE_RGMII;
269 ath79_eth0_data.phy_mask = BIT(MR18_WAN_PHYADDR);
270 ath79_eth0_pll_data.pll_1000 = 0xa6000000;
271 ath79_eth0_pll_data.pll_100 = 0xa0000101;
272 ath79_eth0_pll_data.pll_10 = 0x80001313;
273 ath79_register_eth(0);
275 printk(KERN_ERR "failed to read EFUSE for ethernet cal\n");
278 /* LEDs and Buttons */
279 platform_device_register(&tricolor_leds);
280 ath79_register_leds_gpio(-1, ARRAY_SIZE(MR18_leds_gpio),
282 ath79_register_gpio_keys_polled(-1, MR18_KEYS_POLL_INTERVAL,
283 ARRAY_SIZE(MR18_gpio_keys),
286 /* Clear RTC reset (Needed by SoC WiFi) */
287 ath79_device_reset_clear(QCA955X_RESET_RTC);
290 ath79_register_wmac_simple();
292 pci_main_wifi_data.eeprom_name = "pci_wmac0.eeprom";
293 pci_scan_wifi_data.eeprom_name = "pci_wmac1.eeprom";
294 ath79_pci_set_plat_dev_init(mr18_dual_pci_plat_dev_init);
295 ath79_register_pci();
297 MIPS_MACHINE(ATH79_MACH_MR18, "MR18", "Meraki MR18", mr18_setup);