2 * Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
4 * SPDX-License-Identifier: GPL-2.0
7 #define pr_fmt(fmt) "tegra-xusb-padctl: " fmt
12 #include "../xusb-padctl-common.h"
14 #include <asm/arch/clock.h>
16 #include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
18 #define XUSB_PADCTL_ELPG_PROGRAM 0x024
19 #define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN (1 << 31)
20 #define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY (1 << 30)
21 #define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN (1 << 29)
23 static int tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
27 if (padctl->enable++ > 0)
30 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
31 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
32 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
36 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
37 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
38 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
42 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
43 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
44 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
49 static int tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
53 if (padctl->enable == 0) {
54 error("unbalanced enable/disable");
58 if (--padctl->enable > 0)
61 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
62 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
63 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
67 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
68 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
69 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
73 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
74 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
75 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
80 static int phy_prepare(struct tegra_xusb_phy *phy)
84 err = tegra_xusb_padctl_enable(phy->padctl);
88 reset_set_enable(PERIPH_ID_PEX_USB_UPHY, 0);
93 static int phy_unprepare(struct tegra_xusb_phy *phy)
95 reset_set_enable(PERIPH_ID_PEX_USB_UPHY, 1);
97 return tegra_xusb_padctl_disable(phy->padctl);
100 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1 0x360
101 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV_MASK (0xff << 20)
102 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV(x) (((x) & 0xff) << 20)
103 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_MDIV_MASK (0x3 << 16)
104 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS (1 << 15)
105 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD (1 << 4)
106 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_ENABLE (1 << 3)
107 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP_MASK (0x3 << 1)
108 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP(x) (((x) & 0x3) << 1)
109 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_IDDQ (1 << 0)
111 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2 0x364
112 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL_MASK (0xffffff << 4)
113 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL(x) (((x) & 0xffffff) << 4)
114 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD (1 << 2)
115 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE (1 << 1)
116 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN (1 << 0)
118 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4 0x36c
119 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_EN (1 << 15)
120 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL_MASK (0x3 << 12)
121 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL(x) (((x) & 0x3) << 12)
122 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLKBUF_EN (1 << 8)
123 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLK_SEL_MASK (0xf << 4)
125 #define XUSB_PADCTL_UPHY_PLL_P0_CTL5 0x370
126 #define XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL_MASK (0xff << 16)
127 #define XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL(x) (((x) & 0xff) << 16)
129 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8 0x37c
130 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE (1 << 31)
131 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD (1 << 15)
132 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN (1 << 13)
133 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN (1 << 12)
135 #define CLK_RST_XUSBIO_PLL_CFG0 0x51c
136 #define CLK_RST_XUSBIO_PLL_CFG0_SEQ_ENABLE (1 << 24)
137 #define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_SLEEP_IDDQ (1 << 13)
138 #define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET (1 << 6)
139 #define CLK_RST_XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL (1 << 2)
140 #define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL (1 << 0)
142 static int pcie_phy_enable(struct tegra_xusb_phy *phy)
144 struct tegra_xusb_padctl *padctl = phy->padctl;
148 debug("> %s(phy=%p)\n", __func__, phy);
150 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
151 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL_MASK;
152 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL(0x136);
153 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
155 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL5);
156 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL_MASK;
157 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL(0x2a);
158 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL5);
160 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
161 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD;
162 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
164 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
165 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD;
166 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
168 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
169 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD;
170 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
172 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
173 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL_MASK;
174 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLK_SEL_MASK;
175 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL(2);
176 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_EN;
177 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
179 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
180 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_MDIV_MASK;
181 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV_MASK;
182 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV(25);
183 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
185 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
186 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_IDDQ;
187 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
189 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
190 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP_MASK;
191 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
195 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
196 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLKBUF_EN;
197 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
199 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
200 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN;
201 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
203 debug(" waiting for calibration\n");
205 start = get_timer(0);
207 while (get_timer(start) < 250) {
208 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
209 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE)
215 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
216 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN;
217 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
219 debug(" waiting for calibration to stop\n");
221 start = get_timer(0);
223 while (get_timer(start) < 250) {
224 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
225 if ((value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE) == 0)
231 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
232 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_ENABLE;
233 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
235 debug(" waiting for PLL to lock...\n");
236 start = get_timer(0);
238 while (get_timer(start) < 250) {
239 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
240 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS)
246 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
247 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN;
248 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN;
249 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
251 debug(" waiting for register calibration...\n");
252 start = get_timer(0);
254 while (get_timer(start) < 250) {
255 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
256 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE)
262 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
263 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN;
264 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
266 debug(" waiting for register calibration to stop...\n");
267 start = get_timer(0);
269 while (get_timer(start) < 250) {
270 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
271 if ((value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE) == 0)
277 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
278 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN;
279 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
281 value = readl(NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
282 value &= ~CLK_RST_XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL;
283 value &= ~CLK_RST_XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL;
284 value |= CLK_RST_XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET;
285 value |= CLK_RST_XUSBIO_PLL_CFG0_PADPLL_SLEEP_IDDQ;
286 writel(value, NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
288 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
289 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD;
290 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
292 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
293 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD;
294 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
296 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
297 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD;
298 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
302 value = readl(NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
303 value |= CLK_RST_XUSBIO_PLL_CFG0_SEQ_ENABLE;
304 writel(value, NV_PA_CLK_RST_BASE + CLK_RST_XUSBIO_PLL_CFG0);
306 debug("< %s()\n", __func__);
310 static int pcie_phy_disable(struct tegra_xusb_phy *phy)
315 static const struct tegra_xusb_phy_ops pcie_phy_ops = {
316 .prepare = phy_prepare,
317 .enable = pcie_phy_enable,
318 .disable = pcie_phy_disable,
319 .unprepare = phy_unprepare,
322 static struct tegra_xusb_phy tegra210_phys[] = {
324 .type = TEGRA_XUSB_PADCTL_PCIE,
325 .ops = &pcie_phy_ops,
330 static const struct tegra_xusb_padctl_soc tegra210_socdata = {
335 .phys = tegra210_phys,
336 .num_phys = ARRAY_SIZE(tegra210_phys),
339 void tegra_xusb_padctl_init(const void *fdt)
343 debug("> %s(fdt=%p)\n", __func__, fdt);
345 count = fdtdec_find_aliases_for_id(fdt, "padctl",
346 COMPAT_NVIDIA_TEGRA210_XUSB_PADCTL,
347 nodes, ARRAY_SIZE(nodes));
348 if (tegra_xusb_process_nodes(fdt, nodes, count, &tegra210_socdata))
351 debug("< %s()\n", __func__);