1 From 354655aaf0f71ce2b567cbc02afb0664c99e434e Mon Sep 17 00:00:00 2001
2 From: Chunfeng Yun <chunfeng.yun@mediatek.com>
3 Date: Wed, 3 Jan 2018 16:53:18 +0800
4 Subject: [PATCH 188/224] usb: mtu3: supports remote wakeup for mt2712 with two
7 The old way of usb wakeup only supports platform with single SSUSB IP,
8 such as mt8173, but mt2712 has two SSUSB IPs, so rebuild its flow and
9 also supports the new glue layer of usb wakeup on mt2712 which is
10 different from mt8173.
12 Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
13 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
15 drivers/usb/mtu3/mtu3.h | 11 +++--
16 drivers/usb/mtu3/mtu3_dr.h | 3 +-
17 drivers/usb/mtu3/mtu3_host.c | 115 +++++++++++++++++++++----------------------
18 drivers/usb/mtu3/mtu3_plat.c | 8 +--
19 4 files changed, 70 insertions(+), 67 deletions(-)
21 --- a/drivers/usb/mtu3/mtu3.h
22 +++ b/drivers/usb/mtu3/mtu3.h
23 @@ -238,7 +238,10 @@ struct otg_switch_mtk {
24 * @u3p_dis_msk: mask of disabling usb3 ports, for example, bit0==1 to
25 * disable u3port0, bit1==1 to disable u3port1,... etc
26 * @dbgfs_root: only used when supports manual dual-role switch via debugfs
27 - * @wakeup_en: it's true when supports remote wakeup in host mode
28 + * @uwk_en: it's true when supports remote wakeup in host mode
29 + * @uwk: syscon including usb wakeup glue layer between SSUSB IP and SPM
30 + * @uwk_reg_base: the base address of the wakeup glue layer in @uwk
31 + * @uwk_vers: the version of the wakeup glue layer
35 @@ -262,8 +265,10 @@ struct ssusb_mtk {
37 struct dentry *dbgfs_root;
38 /* usb wakeup for host mode */
40 - struct regmap *pericfg;
48 --- a/drivers/usb/mtu3/mtu3_dr.h
49 +++ b/drivers/usb/mtu3/mtu3_dr.h
50 @@ -27,8 +27,7 @@ int ssusb_wakeup_of_property_parse(struc
51 struct device_node *dn);
52 int ssusb_host_enable(struct ssusb_mtk *ssusb);
53 int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend);
54 -int ssusb_wakeup_enable(struct ssusb_mtk *ssusb);
55 -void ssusb_wakeup_disable(struct ssusb_mtk *ssusb);
56 +void ssusb_wakeup_set(struct ssusb_mtk *ssusb, bool enable);
60 --- a/drivers/usb/mtu3/mtu3_host.c
61 +++ b/drivers/usb/mtu3/mtu3_host.c
66 -#define PERI_WK_CTRL1 0x404
67 -#define UWK_CTL1_IS_C(x) (((x) & 0xf) << 26)
68 -#define UWK_CTL1_IS_E BIT(25)
69 -#define UWK_CTL1_IDDIG_C(x) (((x) & 0xf) << 11) /* cycle debounce */
70 -#define UWK_CTL1_IDDIG_E BIT(10) /* enable debounce */
71 -#define UWK_CTL1_IDDIG_P BIT(9) /* polarity */
72 -#define UWK_CTL1_IS_P BIT(6) /* polarity for ip sleep */
74 +#define PERI_WK_CTRL1 0x4
75 +#define WC1_IS_C(x) (((x) & 0xf) << 26) /* cycle debounce */
76 +#define WC1_IS_EN BIT(25)
77 +#define WC1_IS_P BIT(6) /* polarity for ip sleep */
80 +#define PERI_SSUSB_SPM_CTRL 0x0
81 +#define SSC_IP_SLEEP_EN BIT(4)
82 +#define SSC_SPM_INT_EN BIT(1)
84 +enum ssusb_uwk_vers {
90 * ip-sleep wakeup mode:
91 * all clocks can be turn off, but power domain should be kept on
93 -static void ssusb_wakeup_ip_sleep_en(struct ssusb_mtk *ssusb)
94 +static void ssusb_wakeup_ip_sleep_set(struct ssusb_mtk *ssusb, bool enable)
97 - struct regmap *pericfg = ssusb->pericfg;
100 - regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
101 - tmp &= ~UWK_CTL1_IS_P;
102 - tmp &= ~(UWK_CTL1_IS_C(0xf));
103 - tmp |= UWK_CTL1_IS_C(0x8);
104 - regmap_write(pericfg, PERI_WK_CTRL1, tmp);
105 - regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_IS_E);
107 - regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
108 - dev_dbg(ssusb->dev, "%s(): WK_CTRL1[P6,E25,C26:29]=%#x\n",
112 -static void ssusb_wakeup_ip_sleep_dis(struct ssusb_mtk *ssusb)
116 - regmap_read(ssusb->pericfg, PERI_WK_CTRL1, &tmp);
117 - tmp &= ~UWK_CTL1_IS_E;
118 - regmap_write(ssusb->pericfg, PERI_WK_CTRL1, tmp);
119 + switch (ssusb->uwk_vers) {
121 + reg = ssusb->uwk_reg_base + PERI_WK_CTRL1;
122 + msk = WC1_IS_EN | WC1_IS_C(0xf) | WC1_IS_P;
123 + val = enable ? (WC1_IS_EN | WC1_IS_C(0x8)) : 0;
126 + reg = ssusb->uwk_reg_base + PERI_SSUSB_SPM_CTRL;
127 + msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN;
128 + val = enable ? msk : 0;
133 + regmap_update_bits(ssusb->uwk, reg, msk, val);
136 int ssusb_wakeup_of_property_parse(struct ssusb_mtk *ssusb,
137 struct device_node *dn)
139 - struct device *dev = ssusb->dev;
140 + struct of_phandle_args args;
144 - * Wakeup function is optional, so it is not an error if this property
145 - * does not exist, and in such case, no need to get relative
146 - * properties anymore.
148 - ssusb->wakeup_en = of_property_read_bool(dn, "mediatek,enable-wakeup");
149 - if (!ssusb->wakeup_en)
150 + /* wakeup function is optional */
151 + ssusb->uwk_en = of_property_read_bool(dn, "wakeup-source");
152 + if (!ssusb->uwk_en)
155 - ssusb->pericfg = syscon_regmap_lookup_by_phandle(dn,
156 - "mediatek,syscon-wakeup");
157 - if (IS_ERR(ssusb->pericfg)) {
158 - dev_err(dev, "fail to get pericfg regs\n");
159 - return PTR_ERR(ssusb->pericfg);
161 + ret = of_parse_phandle_with_fixed_args(dn,
162 + "mediatek,syscon-wakeup", 2, 0, &args);
167 + ssusb->uwk_reg_base = args.args[0];
168 + ssusb->uwk_vers = args.args[1];
169 + ssusb->uwk = syscon_node_to_regmap(args.np);
170 + of_node_put(args.np);
171 + dev_info(ssusb->dev, "uwk - reg:0x%x, version:%d\n",
172 + ssusb->uwk_reg_base, ssusb->uwk_vers);
174 + return PTR_ERR_OR_ZERO(ssusb->uwk);
177 +void ssusb_wakeup_set(struct ssusb_mtk *ssusb, bool enable)
180 + ssusb_wakeup_ip_sleep_set(ssusb, enable);
183 static void host_ports_num_get(struct ssusb_mtk *ssusb)
184 @@ -244,17 +255,3 @@ void ssusb_host_exit(struct ssusb_mtk *s
185 of_platform_depopulate(ssusb->dev);
186 ssusb_host_cleanup(ssusb);
189 -int ssusb_wakeup_enable(struct ssusb_mtk *ssusb)
191 - if (ssusb->wakeup_en)
192 - ssusb_wakeup_ip_sleep_en(ssusb);
197 -void ssusb_wakeup_disable(struct ssusb_mtk *ssusb)
199 - if (ssusb->wakeup_en)
200 - ssusb_wakeup_ip_sleep_dis(ssusb);
202 --- a/drivers/usb/mtu3/mtu3_plat.c
203 +++ b/drivers/usb/mtu3/mtu3_plat.c
204 @@ -291,8 +291,10 @@ static int get_ssusb_rscs(struct platfor
206 /* if host role is supported */
207 ret = ssusb_wakeup_of_property_parse(ssusb, node);
210 + dev_err(dev, "failed to parse uwk property\n");
214 /* optional property, ignore the error if it does not exist */
215 of_property_read_u32(node, "mediatek,u3p-dis-msk",
216 @@ -466,7 +468,7 @@ static int __maybe_unused mtu3_suspend(s
217 ssusb_host_disable(ssusb, true);
218 ssusb_phy_power_off(ssusb);
219 ssusb_clks_disable(ssusb);
220 - ssusb_wakeup_enable(ssusb);
221 + ssusb_wakeup_set(ssusb, true);
225 @@ -482,7 +484,7 @@ static int __maybe_unused mtu3_resume(st
229 - ssusb_wakeup_disable(ssusb);
230 + ssusb_wakeup_set(ssusb, false);
231 ret = ssusb_clks_enable(ssusb);