4 * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
5 * Copyright (C) 2014 Roman Byshko <rbyshko@gmail.com>
8 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
10 * SPDX-License-Identifier: GPL-2.0+
14 #include <asm/arch/clock.h>
15 #include <asm/arch/cpu.h>
16 #include <asm/arch/usb_phy.h>
21 #define SUNXI_USB_PMU_IRQ_ENABLE 0x800
22 #ifdef CONFIG_MACH_SUN8I_A33
23 #define SUNXI_USB_CSR 0x410
25 #define SUNXI_USB_CSR 0x404
27 #define SUNXI_USB_PASSBY_EN 1
29 #define SUNXI_EHCI_AHB_ICHR8_EN (1 << 10)
30 #define SUNXI_EHCI_AHB_INCR4_BURST_EN (1 << 9)
31 #define SUNXI_EHCI_AHB_INCRX_ALIGN_EN (1 << 8)
32 #define SUNXI_EHCI_ULPI_BYPASS_EN (1 << 0)
34 static struct sunxi_usb_phy {
44 .usb_rst_mask = CCM_USB_CTRL_PHY0_RST | CCM_USB_CTRL_PHY0_CLK,
48 .usb_rst_mask = CCM_USB_CTRL_PHY1_RST | CCM_USB_CTRL_PHY1_CLK,
51 #if CONFIG_SUNXI_USB_PHYS >= 3
53 .usb_rst_mask = CCM_USB_CTRL_PHY2_RST | CCM_USB_CTRL_PHY2_CLK,
59 static int get_vbus_gpio(int index)
62 case 0: return sunxi_name_to_gpio(CONFIG_USB0_VBUS_PIN);
63 case 1: return sunxi_name_to_gpio(CONFIG_USB1_VBUS_PIN);
64 case 2: return sunxi_name_to_gpio(CONFIG_USB2_VBUS_PIN);
69 static int get_vbus_detect_gpio(int index)
72 case 0: return sunxi_name_to_gpio(CONFIG_USB0_VBUS_DET);
77 static int get_id_detect_gpio(int index)
80 case 0: return sunxi_name_to_gpio(CONFIG_USB0_ID_DET);
85 static void usb_phy_write(struct sunxi_usb_phy *phy, int addr,
88 int j = 0, usbc_bit = 0;
89 void *dest = (void *)SUNXI_USB0_BASE + SUNXI_USB_CSR;
91 #ifdef CONFIG_MACH_SUN8I_A33
92 /* CSR needs to be explicitly initialized to 0 on A33 */
96 usbc_bit = 1 << (phy->id * 2);
97 for (j = 0; j < len; j++) {
98 /* set the bit address to be written */
99 clrbits_le32(dest, 0xff << 8);
100 setbits_le32(dest, (addr + j) << 8);
102 clrbits_le32(dest, usbc_bit);
105 setbits_le32(dest, 1 << 7);
107 clrbits_le32(dest, 1 << 7);
109 setbits_le32(dest, usbc_bit);
111 clrbits_le32(dest, usbc_bit);
117 static void sunxi_usb_phy_config(struct sunxi_usb_phy *phy)
119 /* The following comments are machine
120 * translated from Chinese, you have been warned!
123 /* Regulation 45 ohms */
125 usb_phy_write(phy, 0x0c, 0x01, 1);
127 /* adjust PHY's magnitude and rate */
128 usb_phy_write(phy, 0x20, 0x14, 5);
130 /* threshold adjustment disconnect */
131 #if defined CONFIG_MACH_SUN5I || defined CONFIG_MACH_SUN7I
132 usb_phy_write(phy, 0x2a, 2, 2);
134 usb_phy_write(phy, 0x2a, 3, 2);
140 static void sunxi_usb_phy_passby(int index, int enable)
142 unsigned long bits = 0;
146 addr = (void *)SUNXI_USB1_BASE + SUNXI_USB_PMU_IRQ_ENABLE;
148 addr = (void *)SUNXI_USB2_BASE + SUNXI_USB_PMU_IRQ_ENABLE;
150 bits = SUNXI_EHCI_AHB_ICHR8_EN |
151 SUNXI_EHCI_AHB_INCR4_BURST_EN |
152 SUNXI_EHCI_AHB_INCRX_ALIGN_EN |
153 SUNXI_EHCI_ULPI_BYPASS_EN;
156 setbits_le32(addr, bits);
158 clrbits_le32(addr, bits);
163 void sunxi_usb_phy_enable_squelch_detect(int index, int enable)
165 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
167 usb_phy_write(phy, 0x3c, enable ? 0 : 2, 2);
170 void sunxi_usb_phy_init(int index)
172 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
173 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
176 if (phy->init_count != 1)
179 setbits_le32(&ccm->usb_clk_cfg, phy->usb_rst_mask);
181 sunxi_usb_phy_config(phy);
184 sunxi_usb_phy_passby(index, SUNXI_USB_PASSBY_EN);
187 void sunxi_usb_phy_exit(int index)
189 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
190 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
193 if (phy->init_count != 0)
197 sunxi_usb_phy_passby(index, !SUNXI_USB_PASSBY_EN);
199 clrbits_le32(&ccm->usb_clk_cfg, phy->usb_rst_mask);
202 void sunxi_usb_phy_power_on(int index)
204 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
206 phy->power_on_count++;
207 if (phy->power_on_count != 1)
210 if (phy->gpio_vbus >= 0)
211 gpio_set_value(phy->gpio_vbus, 1);
214 void sunxi_usb_phy_power_off(int index)
216 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
218 phy->power_on_count--;
219 if (phy->power_on_count != 0)
222 if (phy->gpio_vbus >= 0)
223 gpio_set_value(phy->gpio_vbus, 0);
226 int sunxi_usb_phy_power_is_on(int index)
228 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
230 return phy->power_on_count > 0;
233 int sunxi_usb_phy_vbus_detect(int index)
235 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
236 int err, retries = 3;
238 if (phy->gpio_vbus_det < 0)
239 return phy->gpio_vbus_det;
241 err = gpio_get_value(phy->gpio_vbus_det);
243 * Vbus may have been provided by the board and just been turned of
244 * some milliseconds ago on reset, what we're measuring then is a
245 * residual charge on Vbus, sleep a bit and try again.
247 while (err > 0 && retries--) {
249 err = gpio_get_value(phy->gpio_vbus_det);
255 int sunxi_usb_phy_id_detect(int index)
257 struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
259 if (phy->gpio_id_det < 0)
260 return phy->gpio_id_det;
262 return gpio_get_value(phy->gpio_id_det);
265 int sunxi_usb_phy_probe(void)
267 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
268 struct sunxi_usb_phy *phy;
271 for (i = 0; i < CONFIG_SUNXI_USB_PHYS; i++) {
272 phy = &sunxi_usb_phy[i];
274 phy->gpio_vbus = get_vbus_gpio(i);
275 if (phy->gpio_vbus >= 0) {
276 ret = gpio_request(phy->gpio_vbus, "usb_vbus");
279 ret = gpio_direction_output(phy->gpio_vbus, 0);
284 phy->gpio_vbus_det = get_vbus_detect_gpio(i);
285 if (phy->gpio_vbus_det >= 0) {
286 ret = gpio_request(phy->gpio_vbus_det, "usb_vbus_det");
289 ret = gpio_direction_input(phy->gpio_vbus_det);
294 phy->gpio_id_det = get_id_detect_gpio(i);
295 if (phy->gpio_id_det >= 0) {
296 ret = gpio_request(phy->gpio_id_det, "usb_id_det");
299 ret = gpio_direction_input(phy->gpio_id_det);
302 sunxi_gpio_set_pull(phy->gpio_id_det,
307 setbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
312 int sunxi_usb_phy_remove(void)
314 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
315 struct sunxi_usb_phy *phy;
318 clrbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
320 for (i = 0; i < CONFIG_SUNXI_USB_PHYS; i++) {
321 phy = &sunxi_usb_phy[i];
323 if (phy->gpio_vbus >= 0)
324 gpio_free(phy->gpio_vbus);
326 if (phy->gpio_vbus_det >= 0)
327 gpio_free(phy->gpio_vbus_det);
329 if (phy->gpio_id_det >= 0)
330 gpio_free(phy->gpio_id_det);