1// SPDX-License-Identifier: GPL-2.0
2/*
3 * MediaTek xHCI Host Controller Driver
4 *
5 * Copyright (c) 2015 MediaTek Inc.
6 * Author:
7 * Chunfeng Yun <chunfeng.yun@mediatek.com>
8 */
9
10#include <linux/bitfield.h>
11#include <linux/dma-mapping.h>
12#include <linux/iopoll.h>
13#include <linux/kernel.h>
14#include <linux/mfd/syscon.h>
15#include <linux/module.h>
16#include <linux/of.h>
17#include <linux/platform_device.h>
18#include <linux/pm_runtime.h>
19#include <linux/pm_wakeirq.h>
20#include <linux/regmap.h>
21#include <linux/regulator/consumer.h>
22#include <linux/reset.h>
23
24#include "xhci.h"
25#include "xhci-mtk.h"
26
27/* ip_pw_ctrl0 register */
28#define CTRL0_IP_SW_RST BIT(0)
29
30/* ip_pw_ctrl1 register */
31#define CTRL1_IP_HOST_PDN BIT(0)
32
33/* ip_pw_ctrl2 register */
34#define CTRL2_IP_DEV_PDN BIT(0)
35
36/* ip_pw_sts1 register */
37#define STS1_IP_SLEEP_STS BIT(30)
38#define STS1_U3_MAC_RST BIT(16)
39#define STS1_XHCI_RST BIT(11)
40#define STS1_SYS125_RST BIT(10)
41#define STS1_REF_RST BIT(8)
42#define STS1_SYSPLL_STABLE BIT(0)
43
44/* ip_xhci_cap register */
45#define CAP_U3_PORT_NUM(p) ((p) & 0xff)
46#define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff)
47
48/* u3_ctrl_p register */
49#define CTRL_U3_PORT_HOST_SEL BIT(2)
50#define CTRL_U3_PORT_PDN BIT(1)
51#define CTRL_U3_PORT_DIS BIT(0)
52
53/* u2_ctrl_p register */
54#define CTRL_U2_PORT_HOST_SEL BIT(2)
55#define CTRL_U2_PORT_PDN BIT(1)
56#define CTRL_U2_PORT_DIS BIT(0)
57
58/* u2_phy_pll register */
59#define CTRL_U2_FORCE_PLL_STB BIT(28)
60
61/* xHCI CSR */
62#define LS_EOF_CFG 0x930
63#define LSEOF_OFFSET 0x89
64
65#define FS_EOF_CFG 0x934
66#define FSEOF_OFFSET 0x2e
67
68#define SS_GEN1_EOF_CFG 0x93c
69#define SSG1EOF_OFFSET 0x78
70
71#define HFCNTR_CFG 0x944
72#define ITP_DELTA_CLK (0xa << 1)
73#define ITP_DELTA_CLK_MASK GENMASK(5, 1)
74#define FRMCNT_LEV1_RANG (0x12b << 8)
75#define FRMCNT_LEV1_RANG_MASK GENMASK(19, 8)
76
77#define HSCH_CFG1 0x960
78#define SCH3_RXFIFO_DEPTH_MASK GENMASK(21, 20)
79
80#define SS_GEN2_EOF_CFG 0x990
81#define SSG2EOF_OFFSET 0x3c
82
83#define XSEOF_OFFSET_MASK GENMASK(11, 0)
84
85/* usb remote wakeup registers in syscon */
86
87/* mt8173 etc */
88#define PERI_WK_CTRL1 0x4
89#define WC1_IS_C(x) (((x) & 0xf) << 26) /* cycle debounce */
90#define WC1_IS_EN BIT(25)
91#define WC1_IS_P BIT(6) /* polarity for ip sleep */
92
93/* mt8183 */
94#define PERI_WK_CTRL0 0x0
95#define WC0_IS_C(x) ((u32)(((x) & 0xf) << 28)) /* cycle debounce */
96#define WC0_IS_P BIT(12) /* polarity */
97#define WC0_IS_EN BIT(6)
98
99/* mt8192 */
100#define WC0_SSUSB0_CDEN BIT(6)
101#define WC0_IS_SPM_EN BIT(1)
102
103/* mt8195 */
104#define PERI_WK_CTRL0_8195 0x04
105#define WC0_IS_P_95 BIT(30) /* polarity */
106#define WC0_IS_C_95(x) ((u32)(((x) & 0x7) << 27))
107#define WC0_IS_EN_P3_95 BIT(26)
108#define WC0_IS_EN_P2_95 BIT(25)
109#define WC0_IS_EN_P1_95 BIT(24)
110
111#define PERI_WK_CTRL1_8195 0x20
112#define WC1_IS_C_95(x) ((u32)(((x) & 0xf) << 28))
113#define WC1_IS_P_95 BIT(12)
114#define WC1_IS_EN_P0_95 BIT(6)
115
116/* mt2712 etc */
117#define PERI_SSUSB_SPM_CTRL 0x0
118#define SSC_IP_SLEEP_EN BIT(4)
119#define SSC_SPM_INT_EN BIT(1)
120
121#define SCH_FIFO_TO_KB(x) ((x) >> 10)
122
123enum ssusb_uwk_vers {
124 SSUSB_UWK_V1 = 1,
125 SSUSB_UWK_V2,
126 SSUSB_UWK_V1_1 = 101, /* specific revision 1.01 */
127 SSUSB_UWK_V1_2, /* specific revision 1.2 */
128 SSUSB_UWK_V1_3, /* mt8195 IP0 */
129 SSUSB_UWK_V1_4, /* mt8195 IP1 */
130 SSUSB_UWK_V1_5, /* mt8195 IP2 */
131 SSUSB_UWK_V1_6, /* mt8195 IP3 */
132};
133
134/*
135 * MT8195 has 4 controllers, the controller1~3's default SOF/ITP interval
136 * is calculated from the frame counter clock 24M, but in fact, the clock
137 * is 48M, add workaround for it.
138 */
139static void xhci_mtk_set_frame_interval(struct xhci_hcd_mtk *mtk)
140{
141 struct device *dev = mtk->dev;
142 struct usb_hcd *hcd = mtk->hcd;
143 u32 value;
144
145 if (!of_device_is_compatible(device: dev->of_node, "mediatek,mt8195-xhci"))
146 return;
147
148 value = readl(addr: hcd->regs + HFCNTR_CFG);
149 value &= ~(ITP_DELTA_CLK_MASK | FRMCNT_LEV1_RANG_MASK);
150 value |= (ITP_DELTA_CLK | FRMCNT_LEV1_RANG);
151 writel(val: value, addr: hcd->regs + HFCNTR_CFG);
152
153 value = readl(addr: hcd->regs + LS_EOF_CFG);
154 value &= ~XSEOF_OFFSET_MASK;
155 value |= LSEOF_OFFSET;
156 writel(val: value, addr: hcd->regs + LS_EOF_CFG);
157
158 value = readl(addr: hcd->regs + FS_EOF_CFG);
159 value &= ~XSEOF_OFFSET_MASK;
160 value |= FSEOF_OFFSET;
161 writel(val: value, addr: hcd->regs + FS_EOF_CFG);
162
163 value = readl(addr: hcd->regs + SS_GEN1_EOF_CFG);
164 value &= ~XSEOF_OFFSET_MASK;
165 value |= SSG1EOF_OFFSET;
166 writel(val: value, addr: hcd->regs + SS_GEN1_EOF_CFG);
167
168 value = readl(addr: hcd->regs + SS_GEN2_EOF_CFG);
169 value &= ~XSEOF_OFFSET_MASK;
170 value |= SSG2EOF_OFFSET;
171 writel(val: value, addr: hcd->regs + SS_GEN2_EOF_CFG);
172}
173
174/*
175 * workaround: usb3.2 gen1 isoc rx hw issue
176 * host send out unexpected ACK afer device fininsh a burst transfer with
177 * a short packet.
178 */
179static void xhci_mtk_rxfifo_depth_set(struct xhci_hcd_mtk *mtk)
180{
181 struct usb_hcd *hcd = mtk->hcd;
182 u32 value;
183
184 if (!mtk->rxfifo_depth)
185 return;
186
187 value = readl(addr: hcd->regs + HSCH_CFG1);
188 value &= ~SCH3_RXFIFO_DEPTH_MASK;
189 value |= FIELD_PREP(SCH3_RXFIFO_DEPTH_MASK,
190 SCH_FIFO_TO_KB(mtk->rxfifo_depth) - 1);
191 writel(val: value, addr: hcd->regs + HSCH_CFG1);
192}
193
194static void xhci_mtk_init_quirk(struct xhci_hcd_mtk *mtk)
195{
196 /* workaround only for mt8195 */
197 xhci_mtk_set_frame_interval(mtk);
198
199 /* workaround for SoCs using SSUSB about before IPM v1.6.0 */
200 xhci_mtk_rxfifo_depth_set(mtk);
201}
202
203static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
204{
205 struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
206 u32 value, check_val;
207 int u3_ports_disabled = 0;
208 int ret;
209 int i;
210
211 if (!mtk->has_ippc)
212 return 0;
213
214 /* power on host ip */
215 value = readl(addr: &ippc->ip_pw_ctr1);
216 value &= ~CTRL1_IP_HOST_PDN;
217 writel(val: value, addr: &ippc->ip_pw_ctr1);
218
219 /* power on and enable u3 ports except skipped ones */
220 for (i = 0; i < mtk->num_u3_ports; i++) {
221 if ((0x1 << i) & mtk->u3p_dis_msk) {
222 u3_ports_disabled++;
223 continue;
224 }
225
226 value = readl(addr: &ippc->u3_ctrl_p[i]);
227 value &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
228 value |= CTRL_U3_PORT_HOST_SEL;
229 writel(val: value, addr: &ippc->u3_ctrl_p[i]);
230 }
231
232 /* power on and enable all u2 ports except skipped ones */
233 for (i = 0; i < mtk->num_u2_ports; i++) {
234 if (BIT(i) & mtk->u2p_dis_msk)
235 continue;
236
237 value = readl(addr: &ippc->u2_ctrl_p[i]);
238 value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
239 value |= CTRL_U2_PORT_HOST_SEL;
240 writel(val: value, addr: &ippc->u2_ctrl_p[i]);
241 }
242
243 /*
244 * wait for clocks to be stable, and clock domains reset to
245 * be inactive after power on and enable ports
246 */
247 check_val = STS1_SYSPLL_STABLE | STS1_REF_RST |
248 STS1_SYS125_RST | STS1_XHCI_RST;
249
250 if (mtk->num_u3_ports > u3_ports_disabled)
251 check_val |= STS1_U3_MAC_RST;
252
253 ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
254 (check_val == (value & check_val)), 100, 20000);
255 if (ret) {
256 dev_err(mtk->dev, "clocks are not stable (0x%x)\n", value);
257 return ret;
258 }
259
260 return 0;
261}
262
263static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
264{
265 struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
266 u32 value;
267 int ret;
268 int i;
269
270 if (!mtk->has_ippc)
271 return 0;
272
273 /* power down u3 ports except skipped ones */
274 for (i = 0; i < mtk->num_u3_ports; i++) {
275 if ((0x1 << i) & mtk->u3p_dis_msk)
276 continue;
277
278 value = readl(addr: &ippc->u3_ctrl_p[i]);
279 value |= CTRL_U3_PORT_PDN;
280 writel(val: value, addr: &ippc->u3_ctrl_p[i]);
281 }
282
283 /* power down all u2 ports except skipped ones */
284 for (i = 0; i < mtk->num_u2_ports; i++) {
285 if (BIT(i) & mtk->u2p_dis_msk)
286 continue;
287
288 value = readl(addr: &ippc->u2_ctrl_p[i]);
289 value |= CTRL_U2_PORT_PDN;
290 writel(val: value, addr: &ippc->u2_ctrl_p[i]);
291 }
292
293 /* power down host ip */
294 value = readl(addr: &ippc->ip_pw_ctr1);
295 value |= CTRL1_IP_HOST_PDN;
296 writel(val: value, addr: &ippc->ip_pw_ctr1);
297
298 /* wait for host ip to sleep */
299 ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
300 (value & STS1_IP_SLEEP_STS), 100, 100000);
301 if (ret)
302 dev_err(mtk->dev, "ip sleep failed!!!\n");
303 else /* workaound for platforms using low level latch */
304 usleep_range(min: 100, max: 200);
305
306 return ret;
307}
308
309static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk)
310{
311 struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
312 u32 value;
313
314 if (!mtk->has_ippc)
315 return 0;
316
317 /* reset whole ip */
318 value = readl(addr: &ippc->ip_pw_ctr0);
319 value |= CTRL0_IP_SW_RST;
320 writel(val: value, addr: &ippc->ip_pw_ctr0);
321 udelay(usec: 1);
322 value = readl(addr: &ippc->ip_pw_ctr0);
323 value &= ~CTRL0_IP_SW_RST;
324 writel(val: value, addr: &ippc->ip_pw_ctr0);
325
326 /*
327 * device ip is default power-on in fact
328 * power down device ip, otherwise ip-sleep will fail
329 */
330 value = readl(addr: &ippc->ip_pw_ctr2);
331 value |= CTRL2_IP_DEV_PDN;
332 writel(val: value, addr: &ippc->ip_pw_ctr2);
333
334 value = readl(addr: &ippc->ip_xhci_cap);
335 mtk->num_u3_ports = CAP_U3_PORT_NUM(value);
336 mtk->num_u2_ports = CAP_U2_PORT_NUM(value);
337 dev_dbg(mtk->dev, "%s u2p:%d, u3p:%d\n", __func__,
338 mtk->num_u2_ports, mtk->num_u3_ports);
339
340 return xhci_mtk_host_enable(mtk);
341}
342
343/* only clocks can be turn off for ip-sleep wakeup mode */
344static void usb_wakeup_ip_sleep_set(struct xhci_hcd_mtk *mtk, bool enable)
345{
346 u32 reg, msk, val;
347
348 switch (mtk->uwk_vers) {
349 case SSUSB_UWK_V1:
350 reg = mtk->uwk_reg_base + PERI_WK_CTRL1;
351 msk = WC1_IS_EN | WC1_IS_C(0xf) | WC1_IS_P;
352 val = enable ? (WC1_IS_EN | WC1_IS_C(0x8)) : 0;
353 break;
354 case SSUSB_UWK_V1_1:
355 reg = mtk->uwk_reg_base + PERI_WK_CTRL0;
356 msk = WC0_IS_EN | WC0_IS_C(0xf) | WC0_IS_P;
357 val = enable ? (WC0_IS_EN | WC0_IS_C(0x1)) : 0;
358 break;
359 case SSUSB_UWK_V1_2:
360 reg = mtk->uwk_reg_base + PERI_WK_CTRL0;
361 msk = WC0_SSUSB0_CDEN | WC0_IS_SPM_EN;
362 val = enable ? msk : 0;
363 break;
364 case SSUSB_UWK_V1_3:
365 reg = mtk->uwk_reg_base + PERI_WK_CTRL1_8195;
366 msk = WC1_IS_EN_P0_95 | WC1_IS_C_95(0xf) | WC1_IS_P_95;
367 val = enable ? (WC1_IS_EN_P0_95 | WC1_IS_C_95(0x1)) : 0;
368 break;
369 case SSUSB_UWK_V1_4:
370 reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8195;
371 msk = WC0_IS_EN_P1_95 | WC0_IS_C_95(0x7) | WC0_IS_P_95;
372 val = enable ? (WC0_IS_EN_P1_95 | WC0_IS_C_95(0x1)) : 0;
373 break;
374 case SSUSB_UWK_V1_5:
375 reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8195;
376 msk = WC0_IS_EN_P2_95 | WC0_IS_C_95(0x7) | WC0_IS_P_95;
377 val = enable ? (WC0_IS_EN_P2_95 | WC0_IS_C_95(0x1)) : 0;
378 break;
379 case SSUSB_UWK_V1_6:
380 reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8195;
381 msk = WC0_IS_EN_P3_95 | WC0_IS_C_95(0x7) | WC0_IS_P_95;
382 val = enable ? (WC0_IS_EN_P3_95 | WC0_IS_C_95(0x1)) : 0;
383 break;
384 case SSUSB_UWK_V2:
385 reg = mtk->uwk_reg_base + PERI_SSUSB_SPM_CTRL;
386 msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN;
387 val = enable ? msk : 0;
388 break;
389 default:
390 return;
391 }
392 regmap_update_bits(map: mtk->uwk, reg, mask: msk, val);
393}
394
395static int usb_wakeup_of_property_parse(struct xhci_hcd_mtk *mtk,
396 struct device_node *dn)
397{
398 struct of_phandle_args args;
399 int ret;
400
401 /* Wakeup function is optional */
402 mtk->uwk_en = of_property_read_bool(np: dn, propname: "wakeup-source");
403 if (!mtk->uwk_en)
404 return 0;
405
406 ret = of_parse_phandle_with_fixed_args(np: dn,
407 list_name: "mediatek,syscon-wakeup", cell_count: 2, index: 0, out_args: &args);
408 if (ret)
409 return ret;
410
411 mtk->uwk_reg_base = args.args[0];
412 mtk->uwk_vers = args.args[1];
413 mtk->uwk = syscon_node_to_regmap(np: args.np);
414 of_node_put(node: args.np);
415 dev_info(mtk->dev, "uwk - reg:0x%x, version:%d\n",
416 mtk->uwk_reg_base, mtk->uwk_vers);
417
418 return PTR_ERR_OR_ZERO(ptr: mtk->uwk);
419}
420
421static void usb_wakeup_set(struct xhci_hcd_mtk *mtk, bool enable)
422{
423 if (mtk->uwk_en)
424 usb_wakeup_ip_sleep_set(mtk, enable);
425}
426
427static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
428{
429 struct clk_bulk_data *clks = mtk->clks;
430
431 clks[0].id = "sys_ck";
432 clks[1].id = "xhci_ck";
433 clks[2].id = "ref_ck";
434 clks[3].id = "mcu_ck";
435 clks[4].id = "dma_ck";
436 clks[5].id = "frmcnt_ck";
437
438 return devm_clk_bulk_get_optional(dev: mtk->dev, BULK_CLKS_NUM, clks);
439}
440
441static int xhci_mtk_vregs_get(struct xhci_hcd_mtk *mtk)
442{
443 struct regulator_bulk_data *supplies = mtk->supplies;
444
445 supplies[0].supply = "vbus";
446 supplies[1].supply = "vusb33";
447
448 return devm_regulator_bulk_get(dev: mtk->dev, BULK_VREGS_NUM, consumers: supplies);
449}
450
451static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci)
452{
453 struct usb_hcd *hcd = xhci_to_hcd(xhci);
454 struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
455
456 xhci->quirks |= XHCI_MTK_HOST;
457 /*
458 * MTK host controller gives a spurious successful event after a
459 * short transfer. Ignore it.
460 */
461 xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
462 if (mtk->lpm_support)
463 xhci->quirks |= XHCI_LPM_SUPPORT;
464 if (mtk->u2_lpm_disable)
465 xhci->quirks |= XHCI_HW_LPM_DISABLE;
466
467 /*
468 * MTK xHCI 0.96: PSA is 1 by default even if doesn't support stream,
469 * and it's 3 when support it.
470 */
471 if (xhci->hci_version < 0x100 && HCC_MAX_PSA(xhci->hcc_params) == 4)
472 xhci->quirks |= XHCI_BROKEN_STREAMS;
473}
474
475/* called during probe() after chip reset completes */
476static int xhci_mtk_setup(struct usb_hcd *hcd)
477{
478 struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
479 int ret;
480
481 if (usb_hcd_is_primary_hcd(hcd)) {
482 ret = xhci_mtk_ssusb_config(mtk);
483 if (ret)
484 return ret;
485
486 xhci_mtk_init_quirk(mtk);
487 }
488
489 ret = xhci_gen_setup(hcd, get_quirks: xhci_mtk_quirks);
490 if (ret)
491 return ret;
492
493 if (usb_hcd_is_primary_hcd(hcd))
494 ret = xhci_mtk_sch_init(mtk);
495
496 return ret;
497}
498
499static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = {
500 .reset = xhci_mtk_setup,
501 .add_endpoint = xhci_mtk_add_ep,
502 .drop_endpoint = xhci_mtk_drop_ep,
503 .check_bandwidth = xhci_mtk_check_bandwidth,
504 .reset_bandwidth = xhci_mtk_reset_bandwidth,
505};
506
507static struct hc_driver __read_mostly xhci_mtk_hc_driver;
508
509static int xhci_mtk_probe(struct platform_device *pdev)
510{
511 struct device *dev = &pdev->dev;
512 struct device_node *node = dev->of_node;
513 struct xhci_hcd_mtk *mtk;
514 const struct hc_driver *driver;
515 struct xhci_hcd *xhci;
516 struct resource *res;
517 struct usb_hcd *usb3_hcd;
518 struct usb_hcd *hcd;
519 int ret = -ENODEV;
520 int wakeup_irq;
521 int irq;
522
523 if (usb_disabled())
524 return -ENODEV;
525
526 driver = &xhci_mtk_hc_driver;
527 mtk = devm_kzalloc(dev, size: sizeof(*mtk), GFP_KERNEL);
528 if (!mtk)
529 return -ENOMEM;
530
531 mtk->dev = dev;
532
533 ret = xhci_mtk_vregs_get(mtk);
534 if (ret)
535 return dev_err_probe(dev, err: ret, fmt: "Failed to get regulators\n");
536
537 ret = xhci_mtk_clks_get(mtk);
538 if (ret)
539 return ret;
540
541 irq = platform_get_irq_byname_optional(dev: pdev, name: "host");
542 if (irq < 0) {
543 if (irq == -EPROBE_DEFER)
544 return irq;
545
546 /* for backward compatibility */
547 irq = platform_get_irq(pdev, 0);
548 if (irq < 0)
549 return irq;
550 }
551
552 wakeup_irq = platform_get_irq_byname_optional(dev: pdev, name: "wakeup");
553 if (wakeup_irq == -EPROBE_DEFER)
554 return wakeup_irq;
555
556 mtk->lpm_support = of_property_read_bool(np: node, propname: "usb3-lpm-capable");
557 mtk->u2_lpm_disable = of_property_read_bool(np: node, propname: "usb2-lpm-disable");
558 /* optional property, ignore the error if it does not exist */
559 of_property_read_u32(np: node, propname: "mediatek,u3p-dis-msk",
560 out_value: &mtk->u3p_dis_msk);
561 of_property_read_u32(np: node, propname: "mediatek,u2p-dis-msk",
562 out_value: &mtk->u2p_dis_msk);
563
564 of_property_read_u32(np: node, propname: "rx-fifo-depth", out_value: &mtk->rxfifo_depth);
565
566 ret = usb_wakeup_of_property_parse(mtk, dn: node);
567 if (ret) {
568 dev_err(dev, "failed to parse uwk property\n");
569 return ret;
570 }
571
572 pm_runtime_set_active(dev);
573 pm_runtime_use_autosuspend(dev);
574 pm_runtime_set_autosuspend_delay(dev, delay: 4000);
575 pm_runtime_enable(dev);
576 pm_runtime_get_sync(dev);
577
578 ret = regulator_bulk_enable(BULK_VREGS_NUM, consumers: mtk->supplies);
579 if (ret)
580 goto disable_pm;
581
582 ret = clk_bulk_prepare_enable(BULK_CLKS_NUM, clks: mtk->clks);
583 if (ret)
584 goto disable_ldos;
585
586 ret = device_reset_optional(dev);
587 if (ret) {
588 dev_err_probe(dev, err: ret, fmt: "failed to reset controller\n");
589 goto disable_clk;
590 }
591
592 hcd = usb_create_hcd(driver, dev, bus_name: dev_name(dev));
593 if (!hcd) {
594 ret = -ENOMEM;
595 goto disable_clk;
596 }
597
598 /*
599 * USB 2.0 roothub is stored in the platform_device.
600 * Swap it with mtk HCD.
601 */
602 mtk->hcd = platform_get_drvdata(pdev);
603 platform_set_drvdata(pdev, data: mtk);
604
605 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac");
606 hcd->regs = devm_ioremap_resource(dev, res);
607 if (IS_ERR(ptr: hcd->regs)) {
608 ret = PTR_ERR(ptr: hcd->regs);
609 goto put_usb2_hcd;
610 }
611 hcd->rsrc_start = res->start;
612 hcd->rsrc_len = resource_size(res);
613
614 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ippc");
615 if (res) { /* ippc register is optional */
616 mtk->ippc_regs = devm_ioremap_resource(dev, res);
617 if (IS_ERR(ptr: mtk->ippc_regs)) {
618 ret = PTR_ERR(ptr: mtk->ippc_regs);
619 goto put_usb2_hcd;
620 }
621 mtk->has_ippc = true;
622 }
623
624 device_init_wakeup(dev, enable: true);
625 dma_set_max_seg_size(dev, UINT_MAX);
626
627 xhci = hcd_to_xhci(hcd);
628 xhci->main_hcd = hcd;
629 xhci->allow_single_roothub = 1;
630
631 /*
632 * imod_interval is the interrupt moderation value in nanoseconds.
633 * The increment interval is 8 times as much as that defined in
634 * the xHCI spec on MTK's controller.
635 */
636 xhci->imod_interval = 5000;
637 device_property_read_u32(dev, propname: "imod-interval-ns", val: &xhci->imod_interval);
638
639 ret = usb_add_hcd(hcd, irqnum: irq, IRQF_SHARED);
640 if (ret)
641 goto disable_device_wakeup;
642
643 if (!xhci_has_one_roothub(xhci)) {
644 xhci->shared_hcd = usb_create_shared_hcd(driver, dev,
645 bus_name: dev_name(dev), shared_hcd: hcd);
646 if (!xhci->shared_hcd) {
647 ret = -ENOMEM;
648 goto dealloc_usb2_hcd;
649 }
650 }
651
652 usb3_hcd = xhci_get_usb3_hcd(xhci);
653 if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4 &&
654 !(xhci->quirks & XHCI_BROKEN_STREAMS))
655 usb3_hcd->can_do_streams = 1;
656
657 if (xhci->shared_hcd) {
658 ret = usb_add_hcd(hcd: xhci->shared_hcd, irqnum: irq, IRQF_SHARED);
659 if (ret)
660 goto put_usb3_hcd;
661 }
662
663 if (wakeup_irq > 0) {
664 ret = dev_pm_set_dedicated_wake_irq_reverse(dev, irq: wakeup_irq);
665 if (ret) {
666 dev_err(dev, "set wakeup irq %d failed\n", wakeup_irq);
667 goto dealloc_usb3_hcd;
668 }
669 dev_info(dev, "wakeup irq %d\n", wakeup_irq);
670 }
671
672 device_enable_async_suspend(dev);
673 pm_runtime_mark_last_busy(dev);
674 pm_runtime_put_autosuspend(dev);
675 pm_runtime_forbid(dev);
676
677 return 0;
678
679dealloc_usb3_hcd:
680 usb_remove_hcd(hcd: xhci->shared_hcd);
681
682put_usb3_hcd:
683 usb_put_hcd(hcd: xhci->shared_hcd);
684
685dealloc_usb2_hcd:
686 xhci_mtk_sch_exit(mtk);
687 usb_remove_hcd(hcd);
688
689disable_device_wakeup:
690 device_init_wakeup(dev, enable: false);
691
692put_usb2_hcd:
693 usb_put_hcd(hcd);
694
695disable_clk:
696 clk_bulk_disable_unprepare(BULK_CLKS_NUM, clks: mtk->clks);
697
698disable_ldos:
699 regulator_bulk_disable(BULK_VREGS_NUM, consumers: mtk->supplies);
700
701disable_pm:
702 pm_runtime_put_noidle(dev);
703 pm_runtime_disable(dev);
704 return ret;
705}
706
707static void xhci_mtk_remove(struct platform_device *pdev)
708{
709 struct xhci_hcd_mtk *mtk = platform_get_drvdata(pdev);
710 struct usb_hcd *hcd = mtk->hcd;
711 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
712 struct usb_hcd *shared_hcd = xhci->shared_hcd;
713 struct device *dev = &pdev->dev;
714
715 pm_runtime_get_sync(dev);
716 xhci->xhc_state |= XHCI_STATE_REMOVING;
717 dev_pm_clear_wake_irq(dev);
718 device_init_wakeup(dev, enable: false);
719
720 if (shared_hcd) {
721 usb_remove_hcd(hcd: shared_hcd);
722 xhci->shared_hcd = NULL;
723 }
724 usb_remove_hcd(hcd);
725
726 if (shared_hcd)
727 usb_put_hcd(hcd: shared_hcd);
728
729 usb_put_hcd(hcd);
730 xhci_mtk_sch_exit(mtk);
731 clk_bulk_disable_unprepare(BULK_CLKS_NUM, clks: mtk->clks);
732 regulator_bulk_disable(BULK_VREGS_NUM, consumers: mtk->supplies);
733
734 pm_runtime_disable(dev);
735 pm_runtime_put_noidle(dev);
736 pm_runtime_set_suspended(dev);
737}
738
739static int __maybe_unused xhci_mtk_suspend(struct device *dev)
740{
741 struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
742 struct usb_hcd *hcd = mtk->hcd;
743 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
744 struct usb_hcd *shared_hcd = xhci->shared_hcd;
745 int ret;
746
747 xhci_dbg(xhci, "%s: stop port polling\n", __func__);
748 clear_bit(HCD_FLAG_POLL_RH, addr: &hcd->flags);
749 timer_delete_sync(timer: &hcd->rh_timer);
750 if (shared_hcd) {
751 clear_bit(HCD_FLAG_POLL_RH, addr: &shared_hcd->flags);
752 timer_delete_sync(timer: &shared_hcd->rh_timer);
753 }
754
755 ret = xhci_mtk_host_disable(mtk);
756 if (ret)
757 goto restart_poll_rh;
758
759 clk_bulk_disable_unprepare(BULK_CLKS_NUM, clks: mtk->clks);
760 usb_wakeup_set(mtk, enable: true);
761 return 0;
762
763restart_poll_rh:
764 xhci_dbg(xhci, "%s: restart port polling\n", __func__);
765 if (shared_hcd) {
766 set_bit(HCD_FLAG_POLL_RH, addr: &shared_hcd->flags);
767 usb_hcd_poll_rh_status(hcd: shared_hcd);
768 }
769 set_bit(HCD_FLAG_POLL_RH, addr: &hcd->flags);
770 usb_hcd_poll_rh_status(hcd);
771 return ret;
772}
773
774static int __maybe_unused xhci_mtk_resume(struct device *dev)
775{
776 struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
777 struct usb_hcd *hcd = mtk->hcd;
778 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
779 struct usb_hcd *shared_hcd = xhci->shared_hcd;
780 int ret;
781
782 usb_wakeup_set(mtk, enable: false);
783 ret = clk_bulk_prepare_enable(BULK_CLKS_NUM, clks: mtk->clks);
784 if (ret)
785 goto enable_wakeup;
786
787 ret = xhci_mtk_host_enable(mtk);
788 if (ret)
789 goto disable_clks;
790
791 xhci_dbg(xhci, "%s: restart port polling\n", __func__);
792 if (shared_hcd) {
793 set_bit(HCD_FLAG_POLL_RH, addr: &shared_hcd->flags);
794 usb_hcd_poll_rh_status(hcd: shared_hcd);
795 }
796 set_bit(HCD_FLAG_POLL_RH, addr: &hcd->flags);
797 usb_hcd_poll_rh_status(hcd);
798 return 0;
799
800disable_clks:
801 clk_bulk_disable_unprepare(BULK_CLKS_NUM, clks: mtk->clks);
802enable_wakeup:
803 usb_wakeup_set(mtk, enable: true);
804 return ret;
805}
806
807static int __maybe_unused xhci_mtk_runtime_suspend(struct device *dev)
808{
809 struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
810 struct xhci_hcd *xhci = hcd_to_xhci(hcd: mtk->hcd);
811 int ret = 0;
812
813 if (xhci->xhc_state)
814 return -ESHUTDOWN;
815
816 if (device_may_wakeup(dev))
817 ret = xhci_mtk_suspend(dev);
818
819 /* -EBUSY: let PM automatically reschedule another autosuspend */
820 return ret ? -EBUSY : 0;
821}
822
823static int __maybe_unused xhci_mtk_runtime_resume(struct device *dev)
824{
825 struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
826 struct xhci_hcd *xhci = hcd_to_xhci(hcd: mtk->hcd);
827 int ret = 0;
828
829 if (xhci->xhc_state)
830 return -ESHUTDOWN;
831
832 if (device_may_wakeup(dev))
833 ret = xhci_mtk_resume(dev);
834
835 return ret;
836}
837
838static const struct dev_pm_ops xhci_mtk_pm_ops = {
839 SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
840 SET_RUNTIME_PM_OPS(xhci_mtk_runtime_suspend,
841 xhci_mtk_runtime_resume, NULL)
842};
843
844#define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL)
845
846static const struct of_device_id mtk_xhci_of_match[] = {
847 { .compatible = "mediatek,mt8173-xhci"},
848 { .compatible = "mediatek,mt8195-xhci"},
849 { .compatible = "mediatek,mtk-xhci"},
850 { },
851};
852MODULE_DEVICE_TABLE(of, mtk_xhci_of_match);
853
854static struct platform_driver mtk_xhci_driver = {
855 .probe = xhci_mtk_probe,
856 .remove = xhci_mtk_remove,
857 .driver = {
858 .name = "xhci-mtk",
859 .pm = DEV_PM_OPS,
860 .of_match_table = mtk_xhci_of_match,
861 },
862};
863
864static int __init xhci_mtk_init(void)
865{
866 xhci_init_driver(drv: &xhci_mtk_hc_driver, over: &xhci_mtk_overrides);
867 return platform_driver_register(&mtk_xhci_driver);
868}
869module_init(xhci_mtk_init);
870
871static void __exit xhci_mtk_exit(void)
872{
873 platform_driver_unregister(&mtk_xhci_driver);
874}
875module_exit(xhci_mtk_exit);
876
877MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
878MODULE_DESCRIPTION("MediaTek xHCI Host Controller Driver");
879MODULE_LICENSE("GPL v2");
880

source code of linux/drivers/usb/host/xhci-mtk.c