1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
6 #define pr_fmt(fmt) "tegra-xusb-padctl: " fmt
11 #include <dm/of_access.h>
12 #include <dm/ofnode.h>
13 #include <linux/delay.h>
15 #include "../xusb-padctl-common.h"
17 #include <asm/arch/clock.h>
19 #include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
21 DECLARE_GLOBAL_DATA_PTR;
23 enum tegra210_function {
27 TEGRA210_FUNC_PCIE_X1,
28 TEGRA210_FUNC_PCIE_X4,
34 static const char *const tegra210_functions[] = {
45 static const unsigned int tegra210_otg_functions[] = {
52 static const unsigned int tegra210_usb_functions[] = {
57 static const unsigned int tegra210_pci_functions[] = {
58 TEGRA210_FUNC_PCIE_X1,
61 TEGRA210_FUNC_PCIE_X4,
64 #define TEGRA210_LANE(_name, _offset, _shift, _mask, _iddq, _funcs) \
71 .num_funcs = ARRAY_SIZE(tegra210_##_funcs##_functions), \
72 .funcs = tegra210_##_funcs##_functions, \
75 static const struct tegra_xusb_padctl_lane tegra210_lanes[] = {
76 TEGRA210_LANE("otg-0", 0x004, 0, 0x3, 0, otg),
77 TEGRA210_LANE("otg-1", 0x004, 2, 0x3, 0, otg),
78 TEGRA210_LANE("otg-2", 0x004, 4, 0x3, 0, otg),
79 TEGRA210_LANE("otg-3", 0x004, 6, 0x3, 0, otg),
80 TEGRA210_LANE("usb2-bias", 0x004, 18, 0x3, 0, otg),
81 TEGRA210_LANE("hsic-0", 0x004, 14, 0x1, 0, usb),
82 TEGRA210_LANE("hsic-1", 0x004, 15, 0x1, 0, usb),
83 TEGRA210_LANE("pcie-0", 0x028, 12, 0x3, 1, pci),
84 TEGRA210_LANE("pcie-1", 0x028, 14, 0x3, 2, pci),
85 TEGRA210_LANE("pcie-2", 0x028, 16, 0x3, 3, pci),
86 TEGRA210_LANE("pcie-3", 0x028, 18, 0x3, 4, pci),
87 TEGRA210_LANE("pcie-4", 0x028, 20, 0x3, 5, pci),
88 TEGRA210_LANE("pcie-5", 0x028, 22, 0x3, 6, pci),
89 TEGRA210_LANE("pcie-6", 0x028, 24, 0x3, 7, pci),
90 TEGRA210_LANE("sata-0", 0x028, 30, 0x3, 8, pci),
93 #define XUSB_PADCTL_ELPG_PROGRAM 0x024
94 #define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN (1 << 31)
95 #define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY (1 << 30)
96 #define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN (1 << 29)
98 static int tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
102 if (padctl->enable++ > 0)
105 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
106 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
107 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
111 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
112 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
113 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
117 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
118 value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
119 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
124 static int tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
128 if (padctl->enable == 0) {
129 pr_err("unbalanced enable/disable");
133 if (--padctl->enable > 0)
136 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
137 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
138 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
142 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
143 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
144 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
148 value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
149 value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
150 padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
155 static int phy_prepare(struct tegra_xusb_phy *phy)
159 err = tegra_xusb_padctl_enable(phy->padctl);
163 reset_set_enable(PERIPH_ID_PEX_USB_UPHY, 0);
168 static int phy_unprepare(struct tegra_xusb_phy *phy)
170 reset_set_enable(PERIPH_ID_PEX_USB_UPHY, 1);
172 return tegra_xusb_padctl_disable(phy->padctl);
175 #define XUSB_PADCTL_USB3_PAD_MUX 0x28
176 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE (1 << 0)
177 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK0 (1 << 1)
178 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK1 (1 << 2)
179 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK2 (1 << 3)
180 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK3 (1 << 4)
181 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK4 (1 << 5)
182 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK5 (1 << 6)
183 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK6 (1 << 7)
184 #define XUSB_PADCTL_USB3_PAD_MUX_FORCE_SATA_PAD_IDDQ_DISABLE_MASK0 (1 << 8)
186 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1 0x360
187 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV_MASK (0xff << 20)
188 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV(x) (((x) & 0xff) << 20)
189 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_MDIV_MASK (0x3 << 16)
190 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS (1 << 15)
191 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD (1 << 4)
192 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_ENABLE (1 << 3)
193 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP_MASK (0x3 << 1)
194 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP(x) (((x) & 0x3) << 1)
195 #define XUSB_PADCTL_UPHY_PLL_P0_CTL1_IDDQ (1 << 0)
197 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2 0x364
198 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL_MASK (0xffffff << 4)
199 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL(x) (((x) & 0xffffff) << 4)
200 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD (1 << 2)
201 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE (1 << 1)
202 #define XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN (1 << 0)
204 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4 0x36c
205 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_EN (1 << 15)
206 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL_MASK (0x3 << 12)
207 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL(x) (((x) & 0x3) << 12)
208 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLKBUF_EN (1 << 8)
209 #define XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLK_SEL_MASK (0xf << 4)
211 #define XUSB_PADCTL_UPHY_PLL_P0_CTL5 0x370
212 #define XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL_MASK (0xff << 16)
213 #define XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL(x) (((x) & 0xff) << 16)
215 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8 0x37c
216 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE (1 << 31)
217 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD (1 << 15)
218 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN (1 << 13)
219 #define XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN (1 << 12)
221 #define CLK_RST_XUSBIO_PLL_CFG0 0x51c
222 #define CLK_RST_XUSBIO_PLL_CFG0_SEQ_ENABLE (1 << 24)
223 #define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_SLEEP_IDDQ (1 << 13)
224 #define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_USE_LOCKDET (1 << 6)
225 #define CLK_RST_XUSBIO_PLL_CFG0_CLK_ENABLE_SWCTL (1 << 2)
226 #define CLK_RST_XUSBIO_PLL_CFG0_PADPLL_RESET_SWCTL (1 << 0)
228 static int pcie_phy_enable(struct tegra_xusb_phy *phy)
230 struct tegra_xusb_padctl *padctl = phy->padctl;
234 debug("> %s(phy=%p)\n", __func__, phy);
236 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
237 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL_MASK;
238 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_CTRL(0x136);
239 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
241 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL5);
242 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL_MASK;
243 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL5_DCO_CTRL(0x2a);
244 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL5);
246 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
247 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_PWR_OVRD;
248 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
250 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
251 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_OVRD;
252 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
254 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
255 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_OVRD;
256 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
258 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
259 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL_MASK;
260 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLK_SEL_MASK;
261 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_SEL(2);
262 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_TXCLKREF_EN;
263 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
265 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
266 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_MDIV_MASK;
267 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV_MASK;
268 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_FREQ_NDIV(25);
269 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
271 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
272 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_IDDQ;
273 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
275 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
276 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP_MASK;
277 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
281 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
282 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL4_REFCLKBUF_EN;
283 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL4);
285 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
286 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN;
287 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
289 debug(" waiting for calibration\n");
291 start = get_timer(0);
293 while (get_timer(start) < 250) {
294 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
295 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE)
298 if (!(value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE)) {
304 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
305 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_EN;
306 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
308 debug(" waiting for calibration to stop\n");
310 start = get_timer(0);
312 while (get_timer(start) < 250) {
313 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL2);
314 if ((value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE) == 0)
317 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL2_CAL_DONE) {
323 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
324 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_ENABLE;
325 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
327 debug(" waiting for PLL to lock...\n");
328 start = get_timer(0);
330 while (get_timer(start) < 250) {
331 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
332 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS)
335 if (!(value & XUSB_PADCTL_UPHY_PLL_P0_CTL1_LOCKDET_STATUS)) {
341 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
342 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN;
343 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN;
344 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
346 debug(" waiting for register calibration...\n");
347 start = get_timer(0);
349 while (get_timer(start) < 250) {
350 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
351 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE)
354 if (!(value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE)) {
360 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
361 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_EN;
362 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
364 debug(" waiting for register calibration to stop...\n");
365 start = get_timer(0);
367 while (get_timer(start) < 250) {
368 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
369 if ((value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE) == 0)
372 if (value & XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_DONE) {
378 value = padctl_readl(padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
379 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL8_RCAL_CLK_EN;
380 padctl_writel(padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL8);
382 debug("< %s()\n", __func__);
386 static int pcie_phy_disable(struct tegra_xusb_phy *phy)
391 static const struct tegra_xusb_phy_ops pcie_phy_ops = {
392 .prepare = phy_prepare,
393 .enable = pcie_phy_enable,
394 .disable = pcie_phy_disable,
395 .unprepare = phy_unprepare,
398 static struct tegra_xusb_phy tegra210_phys[] = {
400 .type = TEGRA_XUSB_PADCTL_PCIE,
401 .ops = &pcie_phy_ops,
406 static const struct tegra_xusb_padctl_soc tegra210_socdata = {
407 .lanes = tegra210_lanes,
408 .num_lanes = ARRAY_SIZE(tegra210_lanes),
409 .functions = tegra210_functions,
410 .num_functions = ARRAY_SIZE(tegra210_functions),
411 .phys = tegra210_phys,
412 .num_phys = ARRAY_SIZE(tegra210_phys),
415 void tegra_xusb_padctl_init(void)
421 debug("%s: start\n", __func__);
422 if (of_live_active()) {
423 struct device_node *np = of_find_compatible_node(NULL, NULL,
424 "nvidia,tegra210-xusb-padctl");
426 debug("np=%p\n", np);
428 nodes[0] = np_to_ofnode(np);
435 count = fdtdec_find_aliases_for_id(gd->fdt_blob, "padctl",
436 COMPAT_NVIDIA_TEGRA210_XUSB_PADCTL,
437 node_offsets, ARRAY_SIZE(node_offsets));
438 for (i = 0; i < count; i++)
439 nodes[i] = offset_to_ofnode(node_offsets[i]);
442 ret = tegra_xusb_process_nodes(nodes, count, &tegra210_socdata);
443 debug("%s: done, ret=%d\n", __func__, ret);
446 void tegra_xusb_padctl_exit(void)
450 debug("> %s\n", __func__);
452 value = padctl_readl(&padctl, XUSB_PADCTL_USB3_PAD_MUX);
453 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE;
454 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK0;
455 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK1;
456 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK2;
457 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK3;
458 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK4;
459 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK5;
460 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_PCIE_PAD_IDDQ_DISABLE_MASK6;
461 value &= ~XUSB_PADCTL_USB3_PAD_MUX_FORCE_SATA_PAD_IDDQ_DISABLE_MASK0;
462 padctl_writel(&padctl, value, XUSB_PADCTL_USB3_PAD_MUX);
464 value = padctl_readl(&padctl, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
465 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_IDDQ;
466 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP_MASK;
467 value |= XUSB_PADCTL_UPHY_PLL_P0_CTL1_SLEEP(3);
468 value &= ~XUSB_PADCTL_UPHY_PLL_P0_CTL1_ENABLE;
469 padctl_writel(&padctl, value, XUSB_PADCTL_UPHY_PLL_P0_CTL1);
471 reset_set_enable(PERIPH_ID_PEX_USB_UPHY, 1);
472 while (padctl.enable)
473 tegra_xusb_padctl_disable(&padctl);
475 debug("< %s()\n", __func__);