2 * Sunxi usb-controller code shared between the ehci and musb controllers
4 * Copyright (C) 2014 Roman Byshko
6 * Roman Byshko <rbyshko@gmail.com>
9 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
11 * SPDX-License-Identifier: GPL-2.0+
14 #include <asm/arch/clock.h>
15 #include <asm/arch/cpu.h>
16 #include <asm/arch/usbc.h>
20 #ifdef CONFIG_AXP152_POWER
23 #ifdef CONFIG_AXP209_POWER
26 #ifdef CONFIG_AXP221_POWER
30 #define SUNXI_USB_PMU_IRQ_ENABLE 0x800
31 #define SUNXI_USB_CSR 0x404
32 #define SUNXI_USB_PASSBY_EN 1
34 #define SUNXI_EHCI_AHB_ICHR8_EN (1 << 10)
35 #define SUNXI_EHCI_AHB_INCR4_BURST_EN (1 << 9)
36 #define SUNXI_EHCI_AHB_INCRX_ALIGN_EN (1 << 8)
37 #define SUNXI_EHCI_ULPI_BYPASS_EN (1 << 0)
39 static struct sunxi_usbc_hcd {
46 } sunxi_usbc_hcd[] = {
48 .usb_rst_mask = CCM_USB_CTRL_PHY0_RST | CCM_USB_CTRL_PHY0_CLK,
49 .ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB0,
53 .usb_rst_mask = CCM_USB_CTRL_PHY1_RST | CCM_USB_CTRL_PHY1_CLK,
54 .ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
57 #if (CONFIG_USB_MAX_CONTROLLER_COUNT > 1)
59 .usb_rst_mask = CCM_USB_CTRL_PHY2_RST | CCM_USB_CTRL_PHY2_CLK,
60 .ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI1,
66 static int enabled_hcd_count;
68 void *sunxi_usbc_get_io_base(int index)
72 return (void *)SUNXI_USB0_BASE;
74 return (void *)SUNXI_USB1_BASE;
76 return (void *)SUNXI_USB2_BASE;
82 static int get_vbus_gpio(int index)
85 case 0: return sunxi_name_to_gpio(CONFIG_USB0_VBUS_PIN);
86 case 1: return sunxi_name_to_gpio(CONFIG_USB1_VBUS_PIN);
87 case 2: return sunxi_name_to_gpio(CONFIG_USB2_VBUS_PIN);
92 static int get_vbus_detect_gpio(int index)
95 case 0: return sunxi_name_to_gpio(CONFIG_USB0_VBUS_DET);
100 static void usb_phy_write(struct sunxi_usbc_hcd *sunxi_usbc, int addr,
103 int j = 0, usbc_bit = 0;
104 void *dest = sunxi_usbc_get_io_base(0) + SUNXI_USB_CSR;
106 usbc_bit = 1 << (sunxi_usbc->id * 2);
107 for (j = 0; j < len; j++) {
108 /* set the bit address to be written */
109 clrbits_le32(dest, 0xff << 8);
110 setbits_le32(dest, (addr + j) << 8);
112 clrbits_le32(dest, usbc_bit);
115 setbits_le32(dest, 1 << 7);
117 clrbits_le32(dest, 1 << 7);
119 setbits_le32(dest, usbc_bit);
121 clrbits_le32(dest, usbc_bit);
127 static void sunxi_usb_phy_init(struct sunxi_usbc_hcd *sunxi_usbc)
129 /* The following comments are machine
130 * translated from Chinese, you have been warned!
133 /* Regulation 45 ohms */
134 if (sunxi_usbc->id == 0)
135 usb_phy_write(sunxi_usbc, 0x0c, 0x01, 1);
137 /* adjust PHY's magnitude and rate */
138 usb_phy_write(sunxi_usbc, 0x20, 0x14, 5);
140 /* threshold adjustment disconnect */
141 #if defined CONFIG_MACH_SUN4I || defined CONFIG_MACH_SUN6I
142 usb_phy_write(sunxi_usbc, 0x2a, 3, 2);
144 usb_phy_write(sunxi_usbc, 0x2a, 2, 2);
150 static void sunxi_usb_passby(struct sunxi_usbc_hcd *sunxi_usbc, int enable)
152 unsigned long bits = 0;
153 void *addr = sunxi_usbc_get_io_base(sunxi_usbc->id) +
154 SUNXI_USB_PMU_IRQ_ENABLE;
156 bits = SUNXI_EHCI_AHB_ICHR8_EN |
157 SUNXI_EHCI_AHB_INCR4_BURST_EN |
158 SUNXI_EHCI_AHB_INCRX_ALIGN_EN |
159 SUNXI_EHCI_ULPI_BYPASS_EN;
162 setbits_le32(addr, bits);
164 clrbits_le32(addr, bits);
169 void sunxi_usbc_enable_squelch_detect(int index, int enable)
171 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
173 usb_phy_write(sunxi_usbc, 0x3c, enable ? 0 : 2, 2);
176 int sunxi_usbc_request_resources(int index)
178 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
181 sunxi_usbc->gpio_vbus = get_vbus_gpio(index);
182 if (sunxi_usbc->gpio_vbus != -1) {
183 ret |= gpio_request(sunxi_usbc->gpio_vbus, "usbc_vbus");
184 ret |= gpio_direction_output(sunxi_usbc->gpio_vbus, 0);
187 sunxi_usbc->gpio_vbus_det = get_vbus_detect_gpio(index);
188 if (sunxi_usbc->gpio_vbus_det != -1) {
189 ret |= gpio_request(sunxi_usbc->gpio_vbus_det, "usbc_vbus_det");
190 ret |= gpio_direction_input(sunxi_usbc->gpio_vbus_det);
196 int sunxi_usbc_free_resources(int index)
198 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
201 if (sunxi_usbc->gpio_vbus != -1)
202 ret |= gpio_free(sunxi_usbc->gpio_vbus);
204 if (sunxi_usbc->gpio_vbus_det != -1)
205 ret |= gpio_free(sunxi_usbc->gpio_vbus_det);
210 void sunxi_usbc_enable(int index)
212 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
213 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
215 /* enable common PHY only once */
216 if (enabled_hcd_count == 0)
217 setbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
219 setbits_le32(&ccm->usb_clk_cfg, sunxi_usbc->usb_rst_mask);
220 setbits_le32(&ccm->ahb_gate0, sunxi_usbc->ahb_clk_mask);
221 #if defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I
222 setbits_le32(&ccm->ahb_reset0_cfg, sunxi_usbc->ahb_clk_mask);
225 sunxi_usb_phy_init(sunxi_usbc);
227 if (sunxi_usbc->id != 0)
228 sunxi_usb_passby(sunxi_usbc, SUNXI_USB_PASSBY_EN);
233 void sunxi_usbc_disable(int index)
235 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
236 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
238 if (sunxi_usbc->id != 0)
239 sunxi_usb_passby(sunxi_usbc, !SUNXI_USB_PASSBY_EN);
241 #if defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I
242 clrbits_le32(&ccm->ahb_reset0_cfg, sunxi_usbc->ahb_clk_mask);
244 clrbits_le32(&ccm->ahb_gate0, sunxi_usbc->ahb_clk_mask);
245 clrbits_le32(&ccm->usb_clk_cfg, sunxi_usbc->usb_rst_mask);
247 /* disable common PHY only once, for the last enabled hcd */
248 if (enabled_hcd_count == 1)
249 clrbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
254 void sunxi_usbc_vbus_enable(int index)
256 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
258 if (sunxi_usbc->gpio_vbus != -1)
259 gpio_set_value(sunxi_usbc->gpio_vbus, 1);
262 void sunxi_usbc_vbus_disable(int index)
264 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
266 if (sunxi_usbc->gpio_vbus != -1)
267 gpio_set_value(sunxi_usbc->gpio_vbus, 0);
270 int sunxi_usbc_vbus_detect(int index)
272 struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index];
273 int err, retries = 3;
275 if (sunxi_usbc->gpio_vbus_det == -1) {
276 eprintf("Error: invalid vbus detection pin\n");
280 err = gpio_get_value(sunxi_usbc->gpio_vbus_det);
282 * Vbus may have been provided by the board and just been turned of
283 * some milliseconds ago on reset, what we're measuring then is a
284 * residual charge on Vbus, sleep a bit and try again.
286 while (err > 0 && retries--) {
288 err = gpio_get_value(sunxi_usbc->gpio_vbus_det);