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authorArnd Bergmann <arnd@arndb.de>2016-05-09 10:23:47 -0400
committerArnd Bergmann <arnd@arndb.de>2016-05-09 10:23:47 -0400
commit2f0e234039339784ac9b3035d13e2e125844d69d (patch)
treee4278424798b4f9fbbc2a0d6eeba98de93c29ef5
parent675de1d5145bc5e6ef436f2eac00a08516e38e62 (diff)
parentab065e969640d9afd3967266eb3193fb3ac298bd (diff)
Merge tag 'tegra-for-4.7-xhci' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/drivers
Merge "usb: host: xhci-tegra: Changes for v4.7-rc1" from Thierry Reding: This set of patches introduces a driver for the XUSB controller found on NVIDIA Tegra SoCs. When loaded with a firmware (available via the linux- firmware repository), it provides an XHCI-compatible interface. * tag 'tegra-for-4.7-xhci' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: usb: xhci: tegra: Add Tegra210 support usb: xhci: Add NVIDIA Tegra XUSB controller driver dt-bindings: usb: xhci-tegra: Add Tegra210 XUSB controller support dt-bindings: usb: Add NVIDIA Tegra XUSB controller binding
Diffstat
-rw-r--r--Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt120
-rw-r--r--drivers/usb/host/Kconfig9
-rw-r--r--drivers/usb/host/Makefile1
-rw-r--r--drivers/usb/host/xhci-tegra.c1331
4 files changed, 1461 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt b/Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt
new file mode 100644
index 000000000000..d28295a3e55f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt
@@ -0,0 +1,120 @@
1NVIDIA Tegra xHCI controller
2============================
3
4The Tegra xHCI controller supports both USB2 and USB3 interfaces exposed by
5the Tegra XUSB pad controller.
6
7Required properties:
8--------------------
9- compatible: Must be:
10 - Tegra124: "nvidia,tegra124-xusb"
11 - Tegra132: "nvidia,tegra132-xusb", "nvidia,tegra124-xusb"
12 - Tegra210: "nvidia,tegra210-xusb"
13- reg: Must contain the base and length of the xHCI host registers, XUSB FPCI
14 registers and XUSB IPFS registers.
15- reg-names: Must contain the following entries:
16 - "hcd"
17 - "fpci"
18 - "ipfs"
19- interrupts: Must contain the xHCI host interrupt and the mailbox interrupt.
20- clocks: Must contain an entry for each entry in clock-names.
21 See ../clock/clock-bindings.txt for details.
22- clock-names: Must include the following entries:
23 - xusb_host
24 - xusb_host_src
25 - xusb_falcon_src
26 - xusb_ss
27 - xusb_ss_src
28 - xusb_ss_div2
29 - xusb_hs_src
30 - xusb_fs_src
31 - pll_u_480m
32 - clk_m
33 - pll_e
34- resets: Must contain an entry for each entry in reset-names.
35 See ../reset/reset.txt for details.
36- reset-names: Must include the following entries:
37 - xusb_host
38 - xusb_ss
39 - xusb_src
40 Note that xusb_src is the shared reset for xusb_{ss,hs,fs,falcon,host}_src.
41- nvidia,xusb-padctl: phandle to the XUSB pad controller that is used to
42 configure the USB pads used by the XHCI controller
43
44For Tegra124 and Tegra132:
45- avddio-pex-supply: PCIe/USB3 analog logic power supply. Must supply 1.05 V.
46- dvddio-pex-supply: PCIe/USB3 digital logic power supply. Must supply 1.05 V.
47- avdd-usb-supply: USB controller power supply. Must supply 3.3 V.
48- avdd-pll-utmip-supply: UTMI PLL power supply. Must supply 1.8 V.
49- avdd-pll-erefe-supply: PLLE reference PLL power supply. Must supply 1.05 V.
50- avdd-usb-ss-pll-supply: PCIe/USB3 PLL power supply. Must supply 1.05 V.
51- hvdd-usb-ss-supply: High-voltage PCIe/USB3 power supply. Must supply 3.3 V.
52- hvdd-usb-ss-pll-e-supply: High-voltage PLLE power supply. Must supply 3.3 V.
53
54For Tegra210:
55- dvddio-pex-supply: PCIe/USB3 analog logic power supply. Must supply 1.05 V.
56- hvddio-pex-supply: High-voltage PCIe/USB3 power supply. Must supply 1.8 V.
57- avdd-usb-supply: USB controller power supply. Must supply 3.3 V.
58- avdd-pll-utmip-supply: UTMI PLL power supply. Must supply 1.8 V.
59- avdd-pll-uerefe-supply: PLLE reference PLL power supply. Must supply 1.05 V.
60- dvdd-pex-pll-supply: PCIe/USB3 PLL power supply. Must supply 1.05 V.
61- hvdd-pex-pll-e-supply: High-voltage PLLE power supply. Must supply 1.8 V.
62
63Optional properties:
64--------------------
65- phys: Must contain an entry for each entry in phy-names.
66 See ../phy/phy-bindings.txt for details.
67- phy-names: Should include an entry for each PHY used by the controller. The
68 following PHYs are available:
69 - Tegra124: usb2-0, usb2-1, usb2-2, hsic-0, hsic-1, usb3-0, usb3-1
70 - Tegra132: usb2-0, usb2-1, usb2-2, hsic-0, hsic-1, usb3-0, usb3-1
71 - Tegra210: usb2-0, usb2-1, usb2-2, usb2-3, hsic-0, usb3-0, usb3-1, usb3-2,
72 usb3-3
73
74Example:
75--------
76
77 usb@0,70090000 {
78 compatible = "nvidia,tegra124-xusb";
79 reg = <0x0 0x70090000 0x0 0x8000>,
80 <0x0 0x70098000 0x0 0x1000>,
81 <0x0 0x70099000 0x0 0x1000>;
82 reg-names = "hcd", "fpci", "ipfs";
83
84 interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
85 <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
86
87 clocks = <&tegra_car TEGRA124_CLK_XUSB_HOST>,
88 <&tegra_car TEGRA124_CLK_XUSB_HOST_SRC>,
89 <&tegra_car TEGRA124_CLK_XUSB_FALCON_SRC>,
90 <&tegra_car TEGRA124_CLK_XUSB_SS>,
91 <&tegra_car TEGRA124_CLK_XUSB_SS_DIV2>,
92 <&tegra_car TEGRA124_CLK_XUSB_SS_SRC>,
93 <&tegra_car TEGRA124_CLK_XUSB_HS_SRC>,
94 <&tegra_car TEGRA124_CLK_XUSB_FS_SRC>,
95 <&tegra_car TEGRA124_CLK_PLL_U_480M>,
96 <&tegra_car TEGRA124_CLK_CLK_M>,
97 <&tegra_car TEGRA124_CLK_PLL_E>;
98 clock-names = "xusb_host", "xusb_host_src", "xusb_falcon_src",
99 "xusb_ss", "xusb_ss_div2", "xusb_ss_src",
100 "xusb_hs_src", "xusb_fs_src", "pll_u_480m",
101 "clk_m", "pll_e";
102 resets = <&tegra_car 89>, <&tegra_car 156>, <&tegra_car 143>;
103 reset-names = "xusb_host", "xusb_ss", "xusb_src";
104
105 nvidia,xusb-padctl = <&padctl>;
106
107 phys = <&{/padctl@0,7009f000/pads/usb2/usb2-1}>, /* mini-PCIe USB */
108 <&{/padctl@0,7009f000/pads/usb2/usb2-2}>, /* USB A */
109 <&{/padctl@0,7009f000/pads/pcie/pcie-0}>; /* USB A */
110 phy-names = "utmi-1", "utmi-2", "usb3-0";
111
112 avddio-pex-supply = <&vdd_1v05_run>;
113 dvddio-pex-supply = <&vdd_1v05_run>;
114 avdd-usb-supply = <&vdd_3v3_lp0>;
115 avdd-pll-utmip-supply = <&vddio_1v8>;
116 avdd-pll-erefe-supply = <&avdd_1v05_run>;
117 avdd-usb-ss-pll-supply = <&vdd_1v05_run>;
118 hvdd-usb-ss-supply = <&vdd_3v3_lp0>;
119 hvdd-usb-ss-pll-e-supply = <&vdd_3v3_lp0>;
120 };
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 3050b18b2447..6acac6201af0 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -69,6 +69,15 @@ config USB_XHCI_RCAR
69 Say 'Y' to enable the support for the xHCI host controller 69 Say 'Y' to enable the support for the xHCI host controller
70 found in Renesas R-Car ARM SoCs. 70 found in Renesas R-Car ARM SoCs.
71 71
72config USB_XHCI_TEGRA
73 tristate "xHCI support for NVIDIA Tegra SoCs"
74 depends on PHY_TEGRA_XUSB
75 depends on RESET_CONTROLLER
76 select FW_LOADER
77 ---help---
78 Say 'Y' to enable the support for the xHCI host controller
79 found in NVIDIA Tegra124 and later SoCs.
80
72endif # USB_XHCI_HCD 81endif # USB_XHCI_HCD
73 82
74config USB_EHCI_HCD 83config USB_EHCI_HCD
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index a9ddd3c9ec94..6ef785b0ea8f 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
68obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o 68obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
69obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o 69obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o
70obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o 70obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o
71obj-$(CONFIG_USB_XHCI_TEGRA) += xhci-tegra.o
71obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o 72obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o
72obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o 73obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
73obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o 74obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
new file mode 100644
index 000000000000..0f53ae0f464e
--- /dev/null
+++ b/drivers/usb/host/xhci-tegra.c
@@ -0,0 +1,1331 @@
1/*
2 * NVIDIA Tegra xHCI host controller driver
3 *
4 * Copyright (C) 2014 NVIDIA Corporation
5 * Copyright (C) 2014 Google, Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 */
11
12#include <linux/clk.h>
13#include <linux/delay.h>
14#include <linux/dma-mapping.h>
15#include <linux/firmware.h>
16#include <linux/interrupt.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/of_device.h>
20#include <linux/phy/phy.h>
21#include <linux/phy/tegra/xusb.h>
22#include <linux/platform_device.h>
23#include <linux/pm.h>
24#include <linux/regulator/consumer.h>
25#include <linux/reset.h>
26#include <linux/slab.h>
27
28#include "xhci.h"
29
30#define TEGRA_XHCI_SS_HIGH_SPEED 120000000
31#define TEGRA_XHCI_SS_LOW_SPEED 12000000
32
33/* FPCI CFG registers */
34#define XUSB_CFG_1 0x004
35#define XUSB_IO_SPACE_EN BIT(0)
36#define XUSB_MEM_SPACE_EN BIT(1)
37#define XUSB_BUS_MASTER_EN BIT(2)
38#define XUSB_CFG_4 0x010
39#define XUSB_BASE_ADDR_SHIFT 15
40#define XUSB_BASE_ADDR_MASK 0x1ffff
41#define XUSB_CFG_ARU_C11_CSBRANGE 0x41c
42#define XUSB_CFG_CSB_BASE_ADDR 0x800
43
44/* FPCI mailbox registers */
45#define XUSB_CFG_ARU_MBOX_CMD 0x0e4
46#define MBOX_DEST_FALC BIT(27)
47#define MBOX_DEST_PME BIT(28)
48#define MBOX_DEST_SMI BIT(29)
49#define MBOX_DEST_XHCI BIT(30)
50#define MBOX_INT_EN BIT(31)
51#define XUSB_CFG_ARU_MBOX_DATA_IN 0x0e8
52#define CMD_DATA_SHIFT 0
53#define CMD_DATA_MASK 0xffffff
54#define CMD_TYPE_SHIFT 24
55#define CMD_TYPE_MASK 0xff
56#define XUSB_CFG_ARU_MBOX_DATA_OUT 0x0ec
57#define XUSB_CFG_ARU_MBOX_OWNER 0x0f0
58#define MBOX_OWNER_NONE 0
59#define MBOX_OWNER_FW 1
60#define MBOX_OWNER_SW 2
61#define XUSB_CFG_ARU_SMI_INTR 0x428
62#define MBOX_SMI_INTR_FW_HANG BIT(1)
63#define MBOX_SMI_INTR_EN BIT(3)
64
65/* IPFS registers */
66#define IPFS_XUSB_HOST_CONFIGURATION_0 0x180
67#define IPFS_EN_FPCI BIT(0)
68#define IPFS_XUSB_HOST_INTR_MASK_0 0x188
69#define IPFS_IP_INT_MASK BIT(16)
70#define IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0 0x1bc
71
72#define CSB_PAGE_SELECT_MASK 0x7fffff
73#define CSB_PAGE_SELECT_SHIFT 9
74#define CSB_PAGE_OFFSET_MASK 0x1ff
75#define CSB_PAGE_SELECT(addr) ((addr) >> (CSB_PAGE_SELECT_SHIFT) & \
76 CSB_PAGE_SELECT_MASK)
77#define CSB_PAGE_OFFSET(addr) ((addr) & CSB_PAGE_OFFSET_MASK)
78
79/* Falcon CSB registers */
80#define XUSB_FALC_CPUCTL 0x100
81#define CPUCTL_STARTCPU BIT(1)
82#define CPUCTL_STATE_HALTED BIT(4)
83#define CPUCTL_STATE_STOPPED BIT(5)
84#define XUSB_FALC_BOOTVEC 0x104
85#define XUSB_FALC_DMACTL 0x10c
86#define XUSB_FALC_IMFILLRNG1 0x154
87#define IMFILLRNG1_TAG_MASK 0xffff
88#define IMFILLRNG1_TAG_LO_SHIFT 0
89#define IMFILLRNG1_TAG_HI_SHIFT 16
90#define XUSB_FALC_IMFILLCTL 0x158
91
92/* MP CSB registers */
93#define XUSB_CSB_MP_ILOAD_ATTR 0x101a00
94#define XUSB_CSB_MP_ILOAD_BASE_LO 0x101a04
95#define XUSB_CSB_MP_ILOAD_BASE_HI 0x101a08
96#define XUSB_CSB_MP_L2IMEMOP_SIZE 0x101a10
97#define L2IMEMOP_SIZE_SRC_OFFSET_SHIFT 8
98#define L2IMEMOP_SIZE_SRC_OFFSET_MASK 0x3ff
99#define L2IMEMOP_SIZE_SRC_COUNT_SHIFT 24
100#define L2IMEMOP_SIZE_SRC_COUNT_MASK 0xff
101#define XUSB_CSB_MP_L2IMEMOP_TRIG 0x101a14
102#define L2IMEMOP_ACTION_SHIFT 24
103#define L2IMEMOP_INVALIDATE_ALL (0x40 << L2IMEMOP_ACTION_SHIFT)
104#define L2IMEMOP_LOAD_LOCKED_RESULT (0x11 << L2IMEMOP_ACTION_SHIFT)
105#define XUSB_CSB_MP_APMAP 0x10181c
106#define APMAP_BOOTPATH BIT(31)
107
108#define IMEM_BLOCK_SIZE 256
109
110struct tegra_xusb_fw_header {
111 u32 boot_loadaddr_in_imem;
112 u32 boot_codedfi_offset;
113 u32 boot_codetag;
114 u32 boot_codesize;
115 u32 phys_memaddr;
116 u16 reqphys_memsize;
117 u16 alloc_phys_memsize;
118 u32 rodata_img_offset;
119 u32 rodata_section_start;
120 u32 rodata_section_end;
121 u32 main_fnaddr;
122 u32 fwimg_cksum;
123 u32 fwimg_created_time;
124 u32 imem_resident_start;
125 u32 imem_resident_end;
126 u32 idirect_start;
127 u32 idirect_end;
128 u32 l2_imem_start;
129 u32 l2_imem_end;
130 u32 version_id;
131 u8 init_ddirect;
132 u8 reserved[3];
133 u32 phys_addr_log_buffer;
134 u32 total_log_entries;
135 u32 dequeue_ptr;
136 u32 dummy_var[2];
137 u32 fwimg_len;
138 u8 magic[8];
139 u32 ss_low_power_entry_timeout;
140 u8 num_hsic_port;
141 u8 padding[139]; /* Pad to 256 bytes */
142};
143
144struct tegra_xusb_phy_type {
145 const char *name;
146 unsigned int num;
147};
148
149struct tegra_xusb_soc {
150 const char *firmware;
151 const char * const *supply_names;
152 unsigned int num_supplies;
153 const struct tegra_xusb_phy_type *phy_types;
154 unsigned int num_types;
155
156 struct {
157 struct {
158 unsigned int offset;
159 unsigned int count;
160 } usb2, ulpi, hsic, usb3;
161 } ports;
162
163 bool scale_ss_clock;
164};
165
166struct tegra_xusb {
167 struct device *dev;
168 void __iomem *regs;
169 struct usb_hcd *hcd;
170
171 struct mutex lock;
172
173 int xhci_irq;
174 int mbox_irq;
175
176 void __iomem *ipfs_base;
177 void __iomem *fpci_base;
178
179 const struct tegra_xusb_soc *soc;
180
181 struct regulator_bulk_data *supplies;
182
183 struct tegra_xusb_padctl *padctl;
184
185 struct clk *host_clk;
186 struct clk *falcon_clk;
187 struct clk *ss_clk;
188 struct clk *ss_src_clk;
189 struct clk *hs_src_clk;
190 struct clk *fs_src_clk;
191 struct clk *pll_u_480m;
192 struct clk *clk_m;
193 struct clk *pll_e;
194
195 struct reset_control *host_rst;
196 struct reset_control *ss_rst;
197
198 struct phy **phys;
199 unsigned int num_phys;
200
201 /* Firmware loading related */
202 struct {
203 size_t size;
204 void *virt;
205 dma_addr_t phys;
206 } fw;
207};
208
209static struct hc_driver __read_mostly tegra_xhci_hc_driver;
210
211static inline u32 fpci_readl(struct tegra_xusb *tegra, unsigned int offset)
212{
213 return readl(tegra->fpci_base + offset);
214}
215
216static inline void fpci_writel(struct tegra_xusb *tegra, u32 value,
217 unsigned int offset)
218{
219 writel(value, tegra->fpci_base + offset);
220}
221
222static inline u32 ipfs_readl(struct tegra_xusb *tegra, unsigned int offset)
223{
224 return readl(tegra->ipfs_base + offset);
225}
226
227static inline void ipfs_writel(struct tegra_xusb *tegra, u32 value,
228 unsigned int offset)
229{
230 writel(value, tegra->ipfs_base + offset);
231}
232
233static u32 csb_readl(struct tegra_xusb *tegra, unsigned int offset)
234{
235 u32 page = CSB_PAGE_SELECT(offset);
236 u32 ofs = CSB_PAGE_OFFSET(offset);
237
238 fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE);
239
240 return fpci_readl(tegra, XUSB_CFG_CSB_BASE_ADDR + ofs);
241}
242
243static void csb_writel(struct tegra_xusb *tegra, u32 value,
244 unsigned int offset)
245{
246 u32 page = CSB_PAGE_SELECT(offset);
247 u32 ofs = CSB_PAGE_OFFSET(offset);
248
249 fpci_writel(tegra, page, XUSB_CFG_ARU_C11_CSBRANGE);
250 fpci_writel(tegra, value, XUSB_CFG_CSB_BASE_ADDR + ofs);
251}
252
253static int tegra_xusb_set_ss_clk(struct tegra_xusb *tegra,
254 unsigned long rate)
255{
256 unsigned long new_parent_rate, old_parent_rate;
257 struct clk *clk = tegra->ss_src_clk;
258 unsigned int div;
259 int err;
260
261 if (clk_get_rate(clk) == rate)
262 return 0;
263
264 switch (rate) {
265 case TEGRA_XHCI_SS_HIGH_SPEED:
266 /*
267 * Reparent to PLLU_480M. Set divider first to avoid
268 * overclocking.
269 */
270 old_parent_rate = clk_get_rate(clk_get_parent(clk));
271 new_parent_rate = clk_get_rate(tegra->pll_u_480m);
272 div = new_parent_rate / rate;
273
274 err = clk_set_rate(clk, old_parent_rate / div);
275 if (err)
276 return err;
277
278 err = clk_set_parent(clk, tegra->pll_u_480m);
279 if (err)
280 return err;
281
282 /*
283 * The rate should already be correct, but set it again just
284 * to be sure.
285 */
286 err = clk_set_rate(clk, rate);
287 if (err)
288 return err;
289
290 break;
291
292 case TEGRA_XHCI_SS_LOW_SPEED:
293 /* Reparent to CLK_M */
294 err = clk_set_parent(clk, tegra->clk_m);
295 if (err)
296 return err;
297
298 err = clk_set_rate(clk, rate);
299 if (err)
300 return err;
301
302 break;
303
304 default:
305 dev_err(tegra->dev, "Invalid SS rate: %lu Hz\n", rate);
306 return -EINVAL;
307 }
308
309 if (clk_get_rate(clk) != rate) {
310 dev_err(tegra->dev, "SS clock doesn't match requested rate\n");
311 return -EINVAL;
312 }
313
314 return 0;
315}
316
317static unsigned long extract_field(u32 value, unsigned int start,
318 unsigned int count)
319{
320 return (value >> start) & ((1 << count) - 1);
321}
322
323/* Command requests from the firmware */
324enum tegra_xusb_mbox_cmd {
325 MBOX_CMD_MSG_ENABLED = 1,
326 MBOX_CMD_INC_FALC_CLOCK,
327 MBOX_CMD_DEC_FALC_CLOCK,
328 MBOX_CMD_INC_SSPI_CLOCK,
329 MBOX_CMD_DEC_SSPI_CLOCK,
330 MBOX_CMD_SET_BW, /* no ACK/NAK required */
331 MBOX_CMD_SET_SS_PWR_GATING,
332 MBOX_CMD_SET_SS_PWR_UNGATING,
333 MBOX_CMD_SAVE_DFE_CTLE_CTX,
334 MBOX_CMD_AIRPLANE_MODE_ENABLED, /* unused */
335 MBOX_CMD_AIRPLANE_MODE_DISABLED, /* unused */
336 MBOX_CMD_START_HSIC_IDLE,
337 MBOX_CMD_STOP_HSIC_IDLE,
338 MBOX_CMD_DBC_WAKE_STACK, /* unused */
339 MBOX_CMD_HSIC_PRETEND_CONNECT,
340 MBOX_CMD_RESET_SSPI,
341 MBOX_CMD_DISABLE_SS_LFPS_DETECTION,
342 MBOX_CMD_ENABLE_SS_LFPS_DETECTION,
343
344 MBOX_CMD_MAX,
345
346 /* Response message to above commands */
347 MBOX_CMD_ACK = 128,
348 MBOX_CMD_NAK
349};
350
351static const char * const mbox_cmd_name[] = {
352 [ 1] = "MSG_ENABLE",
353 [ 2] = "INC_FALCON_CLOCK",
354 [ 3] = "DEC_FALCON_CLOCK",
355 [ 4] = "INC_SSPI_CLOCK",
356 [ 5] = "DEC_SSPI_CLOCK",
357 [ 6] = "SET_BW",
358 [ 7] = "SET_SS_PWR_GATING",
359 [ 8] = "SET_SS_PWR_UNGATING",
360 [ 9] = "SAVE_DFE_CTLE_CTX",
361 [ 10] = "AIRPLANE_MODE_ENABLED",
362 [ 11] = "AIRPLANE_MODE_DISABLED",
363 [ 12] = "START_HSIC_IDLE",
364 [ 13] = "STOP_HSIC_IDLE",
365 [ 14] = "DBC_WAKE_STACK",
366 [ 15] = "HSIC_PRETEND_CONNECT",
367 [ 16] = "RESET_SSPI",
368 [ 17] = "DISABLE_SS_LFPS_DETECTION",
369 [ 18] = "ENABLE_SS_LFPS_DETECTION",
370 [128] = "ACK",
371 [129] = "NAK",
372};
373
374struct tegra_xusb_mbox_msg {
375 u32 cmd;
376 u32 data;
377};
378
379static inline u32 tegra_xusb_mbox_pack(const struct tegra_xusb_mbox_msg *msg)
380{
381 return (msg->cmd & CMD_TYPE_MASK) << CMD_TYPE_SHIFT |
382 (msg->data & CMD_DATA_MASK) << CMD_DATA_SHIFT;
383}
384static inline void tegra_xusb_mbox_unpack(struct tegra_xusb_mbox_msg *msg,
385 u32 value)
386{
387 msg->cmd = (value >> CMD_TYPE_SHIFT) & CMD_TYPE_MASK;
388 msg->data = (value >> CMD_DATA_SHIFT) & CMD_DATA_MASK;
389}
390
391static bool tegra_xusb_mbox_cmd_requires_ack(enum tegra_xusb_mbox_cmd cmd)
392{
393 switch (cmd) {
394 case MBOX_CMD_SET_BW:
395 case MBOX_CMD_ACK:
396 case MBOX_CMD_NAK:
397 return false;
398
399 default:
400 return true;
401 }
402}
403
404static int tegra_xusb_mbox_send(struct tegra_xusb *tegra,
405 const struct tegra_xusb_mbox_msg *msg)
406{
407 bool wait_for_idle = false;
408 u32 value;
409
410 /*
411 * Acquire the mailbox. The firmware still owns the mailbox for
412 * ACK/NAK messages.
413 */
414 if (!(msg->cmd == MBOX_CMD_ACK || msg->cmd == MBOX_CMD_NAK)) {
415 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
416 if (value != MBOX_OWNER_NONE) {
417 dev_err(tegra->dev, "mailbox is busy\n");
418 return -EBUSY;
419 }
420
421 fpci_writel(tegra, MBOX_OWNER_SW, XUSB_CFG_ARU_MBOX_OWNER);
422
423 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
424 if (value != MBOX_OWNER_SW) {
425 dev_err(tegra->dev, "failed to acquire mailbox\n");
426 return -EBUSY;
427 }
428
429 wait_for_idle = true;
430 }
431
432 value = tegra_xusb_mbox_pack(msg);
433 fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_DATA_IN);
434
435 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
436 value |= MBOX_INT_EN | MBOX_DEST_FALC;
437 fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_CMD);
438
439 if (wait_for_idle) {
440 unsigned long timeout = jiffies + msecs_to_jiffies(250);
441
442 while (time_before(jiffies, timeout)) {
443 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
444 if (value == MBOX_OWNER_NONE)
445 break;
446
447 usleep_range(10, 20);
448 }
449
450 if (time_after(jiffies, timeout))
451 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
452
453 if (value != MBOX_OWNER_NONE)
454 return -ETIMEDOUT;
455 }
456
457 return 0;
458}
459
460static irqreturn_t tegra_xusb_mbox_irq(int irq, void *data)
461{
462 struct tegra_xusb *tegra = data;
463 u32 value;
464
465 /* clear mailbox interrupts */
466 value = fpci_readl(tegra, XUSB_CFG_ARU_SMI_INTR);
467 fpci_writel(tegra, value, XUSB_CFG_ARU_SMI_INTR);
468
469 if (value & MBOX_SMI_INTR_FW_HANG)
470 dev_err(tegra->dev, "controller firmware hang\n");
471
472 return IRQ_WAKE_THREAD;
473}
474
475static void tegra_xusb_mbox_handle(struct tegra_xusb *tegra,
476 const struct tegra_xusb_mbox_msg *msg)
477{
478 struct tegra_xusb_padctl *padctl = tegra->padctl;
479 const struct tegra_xusb_soc *soc = tegra->soc;
480 struct device *dev = tegra->dev;
481 struct tegra_xusb_mbox_msg rsp;
482 unsigned long mask;
483 unsigned int port;
484 bool idle, enable;
485 int err;
486
487 memset(&rsp, 0, sizeof(rsp));
488
489 switch (msg->cmd) {
490 case MBOX_CMD_INC_FALC_CLOCK:
491 case MBOX_CMD_DEC_FALC_CLOCK:
492 rsp.data = clk_get_rate(tegra->falcon_clk) / 1000;
493 if (rsp.data != msg->data)
494 rsp.cmd = MBOX_CMD_NAK;
495 else
496 rsp.cmd = MBOX_CMD_ACK;
497
498 break;
499
500 case MBOX_CMD_INC_SSPI_CLOCK:
501 case MBOX_CMD_DEC_SSPI_CLOCK:
502 if (tegra->soc->scale_ss_clock) {
503 err = tegra_xusb_set_ss_clk(tegra, msg->data * 1000);
504 if (err < 0)
505 rsp.cmd = MBOX_CMD_NAK;
506 else
507 rsp.cmd = MBOX_CMD_ACK;
508
509 rsp.data = clk_get_rate(tegra->ss_src_clk) / 1000;
510 } else {
511 rsp.cmd = MBOX_CMD_ACK;
512 rsp.data = msg->data;
513 }
514
515 break;
516
517 case MBOX_CMD_SET_BW:
518 /*
519 * TODO: Request bandwidth once EMC scaling is supported.
520 * Ignore for now since ACK/NAK is not required for SET_BW
521 * messages.
522 */
523 break;
524
525 case MBOX_CMD_SAVE_DFE_CTLE_CTX:
526 err = tegra_xusb_padctl_usb3_save_context(padctl, msg->data);
527 if (err < 0) {
528 dev_err(dev, "failed to save context for USB3#%u: %d\n",
529 msg->data, err);
530 rsp.cmd = MBOX_CMD_NAK;
531 } else {
532 rsp.cmd = MBOX_CMD_ACK;
533 }
534
535 rsp.data = msg->data;
536 break;
537
538 case MBOX_CMD_START_HSIC_IDLE:
539 case MBOX_CMD_STOP_HSIC_IDLE:
540 if (msg->cmd == MBOX_CMD_STOP_HSIC_IDLE)
541 idle = false;
542 else
543 idle = true;
544
545 mask = extract_field(msg->data, 1 + soc->ports.hsic.offset,
546 soc->ports.hsic.count);
547
548 for_each_set_bit(port, &mask, 32) {
549 err = tegra_xusb_padctl_hsic_set_idle(padctl, port,
550 idle);
551 if (err < 0)
552 break;
553 }
554
555 if (err < 0) {
556 dev_err(dev, "failed to set HSIC#%u %s: %d\n", port,
557 idle ? "idle" : "busy", err);
558 rsp.cmd = MBOX_CMD_NAK;
559 } else {
560 rsp.cmd = MBOX_CMD_ACK;
561 }
562
563 rsp.data = msg->data;
564 break;
565
566 case MBOX_CMD_DISABLE_SS_LFPS_DETECTION:
567 case MBOX_CMD_ENABLE_SS_LFPS_DETECTION:
568 if (msg->cmd == MBOX_CMD_DISABLE_SS_LFPS_DETECTION)
569 enable = false;
570 else
571 enable = true;
572
573 mask = extract_field(msg->data, 1 + soc->ports.usb3.offset,
574 soc->ports.usb3.count);
575
576 for_each_set_bit(port, &mask, soc->ports.usb3.count) {
577 err = tegra_xusb_padctl_usb3_set_lfps_detect(padctl,
578 port,
579 enable);
580 if (err < 0)
581 break;
582 }
583
584 if (err < 0) {
585 dev_err(dev,
586 "failed to %s LFPS detection on USB3#%u: %d\n",
587 enable ? "enable" : "disable", port, err);
588 rsp.cmd = MBOX_CMD_NAK;
589 } else {
590 rsp.cmd = MBOX_CMD_ACK;
591 }
592
593 rsp.data = msg->data;
594 break;
595
596 default:
597 dev_warn(dev, "unknown message: %#x\n", msg->cmd);
598 break;
599 }
600
601 if (rsp.cmd) {
602 const char *cmd = (rsp.cmd == MBOX_CMD_ACK) ? "ACK" : "NAK";
603
604 err = tegra_xusb_mbox_send(tegra, &rsp);
605 if (err < 0)
606 dev_err(dev, "failed to send %s: %d\n", cmd, err);
607 }
608}
609
610static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
611{
612 struct tegra_xusb *tegra = data;
613 struct tegra_xusb_mbox_msg msg;
614 u32 value;
615
616 mutex_lock(&tegra->lock);
617
618 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_DATA_OUT);
619 tegra_xusb_mbox_unpack(&msg, value);
620
621 value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
622 value &= ~MBOX_DEST_SMI;
623 fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_CMD);
624
625 /* clear mailbox owner if no ACK/NAK is required */
626 if (!tegra_xusb_mbox_cmd_requires_ack(msg.cmd))
627 fpci_writel(tegra, MBOX_OWNER_NONE, XUSB_CFG_ARU_MBOX_OWNER);
628
629 tegra_xusb_mbox_handle(tegra, &msg);
630
631 mutex_unlock(&tegra->lock);
632 return IRQ_HANDLED;
633}
634
635static void tegra_xusb_ipfs_config(struct tegra_xusb *tegra,
636 struct resource *regs)
637{
638 u32 value;
639
640 value = ipfs_readl(tegra, IPFS_XUSB_HOST_CONFIGURATION_0);
641 value |= IPFS_EN_FPCI;
642 ipfs_writel(tegra, value, IPFS_XUSB_HOST_CONFIGURATION_0);
643
644 usleep_range(10, 20);
645
646 /* Program BAR0 space */
647 value = fpci_readl(tegra, XUSB_CFG_4);
648 value &= ~(XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT);
649 value |= regs->start & (XUSB_BASE_ADDR_MASK << XUSB_BASE_ADDR_SHIFT);
650 fpci_writel(tegra, value, XUSB_CFG_4);
651
652 usleep_range(100, 200);
653
654 /* Enable bus master */
655 value = fpci_readl(tegra, XUSB_CFG_1);
656 value |= XUSB_IO_SPACE_EN | XUSB_MEM_SPACE_EN | XUSB_BUS_MASTER_EN;
657 fpci_writel(tegra, value, XUSB_CFG_1);
658
659 /* Enable interrupt assertion */
660 value = ipfs_readl(tegra, IPFS_XUSB_HOST_INTR_MASK_0);
661 value |= IPFS_IP_INT_MASK;
662 ipfs_writel(tegra, value, IPFS_XUSB_HOST_INTR_MASK_0);
663
664 /* Set hysteresis */
665 ipfs_writel(tegra, 0x80, IPFS_XUSB_HOST_CLKGATE_HYSTERESIS_0);
666}
667
668static int tegra_xusb_clk_enable(struct tegra_xusb *tegra)
669{
670 int err;
671
672 err = clk_prepare_enable(tegra->pll_e);
673 if (err < 0)
674 return err;
675
676 err = clk_prepare_enable(tegra->host_clk);
677 if (err < 0)
678 goto disable_plle;
679
680 err = clk_prepare_enable(tegra->ss_clk);
681 if (err < 0)
682 goto disable_host;
683
684 err = clk_prepare_enable(tegra->falcon_clk);
685 if (err < 0)
686 goto disable_ss;
687
688 err = clk_prepare_enable(tegra->fs_src_clk);
689 if (err < 0)
690 goto disable_falc;
691
692 err = clk_prepare_enable(tegra->hs_src_clk);
693 if (err < 0)
694 goto disable_fs_src;
695
696 if (tegra->soc->scale_ss_clock) {
697 err = tegra_xusb_set_ss_clk(tegra, TEGRA_XHCI_SS_HIGH_SPEED);
698 if (err < 0)
699 goto disable_hs_src;
700 }
701
702 return 0;
703
704disable_hs_src:
705 clk_disable_unprepare(tegra->hs_src_clk);
706disable_fs_src:
707 clk_disable_unprepare(tegra->fs_src_clk);
708disable_falc:
709 clk_disable_unprepare(tegra->falcon_clk);
710disable_ss:
711 clk_disable_unprepare(tegra->ss_clk);
712disable_host:
713 clk_disable_unprepare(tegra->host_clk);
714disable_plle:
715 clk_disable_unprepare(tegra->pll_e);
716 return err;
717}
718
719static void tegra_xusb_clk_disable(struct tegra_xusb *tegra)
720{
721 clk_disable_unprepare(tegra->pll_e);
722 clk_disable_unprepare(tegra->host_clk);
723 clk_disable_unprepare(tegra->ss_clk);
724 clk_disable_unprepare(tegra->falcon_clk);
725 clk_disable_unprepare(tegra->fs_src_clk);
726 clk_disable_unprepare(tegra->hs_src_clk);
727}
728
729static int tegra_xusb_phy_enable(struct tegra_xusb *tegra)
730{
731 unsigned int i;
732 int err;
733
734 for (i = 0; i < tegra->num_phys; i++) {
735 err = phy_init(tegra->phys[i]);
736 if (err)
737 goto disable_phy;
738
739 err = phy_power_on(tegra->phys[i]);
740 if (err) {
741 phy_exit(tegra->phys[i]);
742 goto disable_phy;
743 }
744 }
745
746 return 0;
747
748disable_phy:
749 while (i--) {
750 phy_power_off(tegra->phys[i]);
751 phy_exit(tegra->phys[i]);
752 }
753
754 return err;
755}
756
757static void tegra_xusb_phy_disable(struct tegra_xusb *tegra)
758{
759 unsigned int i;
760
761 for (i = 0; i < tegra->num_phys; i++) {
762 phy_power_off(tegra->phys[i]);
763 phy_exit(tegra->phys[i]);
764 }
765}
766
767static int tegra_xusb_load_firmware(struct tegra_xusb *tegra)
768{
769 unsigned int code_tag_blocks, code_size_blocks, code_blocks;
770 struct tegra_xusb_fw_header *header;
771 struct device *dev = tegra->dev;
772 const struct firmware *fw;
773 unsigned long timeout;
774 time_t timestamp;
775 struct tm time;
776 u64 address;
777 u32 value;
778 int err;
779
780 err = request_firmware(&fw, tegra->soc->firmware, tegra->dev);
781 if (err < 0) {
782 dev_err(tegra->dev, "failed to request firmware: %d\n", err);
783 return err;
784 }
785
786 /* Load Falcon controller with its firmware. */
787 header = (struct tegra_xusb_fw_header *)fw->data;
788 tegra->fw.size = le32_to_cpu(header->fwimg_len);
789
790 tegra->fw.virt = dma_alloc_coherent(tegra->dev, tegra->fw.size,
791 &tegra->fw.phys, GFP_KERNEL);
792 if (!tegra->fw.virt) {
793 dev_err(tegra->dev, "failed to allocate memory for firmware\n");
794 release_firmware(fw);
795 return -ENOMEM;
796 }
797
798 header = (struct tegra_xusb_fw_header *)tegra->fw.virt;
799 memcpy(tegra->fw.virt, fw->data, tegra->fw.size);
800 release_firmware(fw);
801
802 if (csb_readl(tegra, XUSB_CSB_MP_ILOAD_BASE_LO) != 0) {
803 dev_info(dev, "Firmware already loaded, Falcon state %#x\n",
804 csb_readl(tegra, XUSB_FALC_CPUCTL));
805 return 0;
806 }
807
808 /* Program the size of DFI into ILOAD_ATTR. */
809 csb_writel(tegra, tegra->fw.size, XUSB_CSB_MP_ILOAD_ATTR);
810
811 /*
812 * Boot code of the firmware reads the ILOAD_BASE registers
813 * to get to the start of the DFI in system memory.
814 */
815 address = tegra->fw.phys + sizeof(*header);
816 csb_writel(tegra, address >> 32, XUSB_CSB_MP_ILOAD_BASE_HI);
817 csb_writel(tegra, address, XUSB_CSB_MP_ILOAD_BASE_LO);
818
819 /* Set BOOTPATH to 1 in APMAP. */
820 csb_writel(tegra, APMAP_BOOTPATH, XUSB_CSB_MP_APMAP);
821
822 /* Invalidate L2IMEM. */
823 csb_writel(tegra, L2IMEMOP_INVALIDATE_ALL, XUSB_CSB_MP_L2IMEMOP_TRIG);
824
825 /*
826 * Initiate fetch of bootcode from system memory into L2IMEM.
827 * Program bootcode location and size in system memory.
828 */
829 code_tag_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codetag),
830 IMEM_BLOCK_SIZE);
831 code_size_blocks = DIV_ROUND_UP(le32_to_cpu(header->boot_codesize),
832 IMEM_BLOCK_SIZE);
833 code_blocks = code_tag_blocks + code_size_blocks;
834
835 value = ((code_tag_blocks & L2IMEMOP_SIZE_SRC_OFFSET_MASK) <<
836 L2IMEMOP_SIZE_SRC_OFFSET_SHIFT) |
837 ((code_size_blocks & L2IMEMOP_SIZE_SRC_COUNT_MASK) <<
838 L2IMEMOP_SIZE_SRC_COUNT_SHIFT);
839 csb_writel(tegra, value, XUSB_CSB_MP_L2IMEMOP_SIZE);
840
841 /* Trigger L2IMEM load operation. */
842 csb_writel(tegra, L2IMEMOP_LOAD_LOCKED_RESULT,
843 XUSB_CSB_MP_L2IMEMOP_TRIG);
844
845 /* Setup Falcon auto-fill. */
846 csb_writel(tegra, code_size_blocks, XUSB_FALC_IMFILLCTL);
847
848 value = ((code_tag_blocks & IMFILLRNG1_TAG_MASK) <<
849 IMFILLRNG1_TAG_LO_SHIFT) |
850 ((code_blocks & IMFILLRNG1_TAG_MASK) <<
851 IMFILLRNG1_TAG_HI_SHIFT);
852 csb_writel(tegra, value, XUSB_FALC_IMFILLRNG1);
853
854 csb_writel(tegra, 0, XUSB_FALC_DMACTL);
855
856 msleep(50);
857
858 csb_writel(tegra, le32_to_cpu(header->boot_codetag),
859 XUSB_FALC_BOOTVEC);
860
861 /* Boot Falcon CPU and wait for it to enter the STOPPED (idle) state. */
862 timeout = jiffies + msecs_to_jiffies(5);
863
864 csb_writel(tegra, CPUCTL_STARTCPU, XUSB_FALC_CPUCTL);
865
866 while (time_before(jiffies, timeout)) {
867 if (csb_readl(tegra, XUSB_FALC_CPUCTL) == CPUCTL_STATE_STOPPED)
868 break;
869
870 usleep_range(100, 200);
871 }
872
873 if (csb_readl(tegra, XUSB_FALC_CPUCTL) != CPUCTL_STATE_STOPPED) {
874 dev_err(dev, "Falcon failed to start, state: %#x\n",
875 csb_readl(tegra, XUSB_FALC_CPUCTL));
876 return -EIO;
877 }
878
879 timestamp = le32_to_cpu(header->fwimg_created_time);
880 time_to_tm(timestamp, 0, &time);
881
882 dev_info(dev, "Firmware timestamp: %ld-%02d-%02d %02d:%02d:%02d UTC\n",
883 time.tm_year + 1900, time.tm_mon + 1, time.tm_mday,
884 time.tm_hour, time.tm_min, time.tm_sec);
885
886 return 0;
887}
888
889static int tegra_xusb_probe(struct platform_device *pdev)
890{
891 struct tegra_xusb_mbox_msg msg;
892 struct resource *res, *regs;
893 struct tegra_xusb *tegra;
894 struct xhci_hcd *xhci;
895 unsigned int i, j, k;
896 struct phy *phy;
897 int err;
898
899 BUILD_BUG_ON(sizeof(struct tegra_xusb_fw_header) != 256);
900
901 tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
902 if (!tegra)
903 return -ENOMEM;
904
905 tegra->soc = of_device_get_match_data(&pdev->dev);
906 mutex_init(&tegra->lock);
907 tegra->dev = &pdev->dev;
908
909 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
910 tegra->regs = devm_ioremap_resource(&pdev->dev, regs);
911 if (IS_ERR(tegra->regs))
912 return PTR_ERR(tegra->regs);
913
914 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
915 tegra->fpci_base = devm_ioremap_resource(&pdev->dev, res);
916 if (IS_ERR(tegra->fpci_base))
917 return PTR_ERR(tegra->fpci_base);
918
919 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
920 tegra->ipfs_base = devm_ioremap_resource(&pdev->dev, res);
921 if (IS_ERR(tegra->ipfs_base))
922 return PTR_ERR(tegra->ipfs_base);
923
924 tegra->xhci_irq = platform_get_irq(pdev, 0);
925 if (tegra->xhci_irq < 0)
926 return tegra->xhci_irq;
927
928 tegra->mbox_irq = platform_get_irq(pdev, 1);
929 if (tegra->mbox_irq < 0)
930 return tegra->mbox_irq;
931
932 tegra->padctl = tegra_xusb_padctl_get(&pdev->dev);
933 if (IS_ERR(tegra->padctl))
934 return PTR_ERR(tegra->padctl);
935
936 tegra->host_rst = devm_reset_control_get(&pdev->dev, "xusb_host");
937 if (IS_ERR(tegra->host_rst)) {
938 err = PTR_ERR(tegra->host_rst);
939 dev_err(&pdev->dev, "failed to get xusb_host reset: %d\n", err);
940 goto put_padctl;
941 }
942
943 tegra->ss_rst = devm_reset_control_get(&pdev->dev, "xusb_ss");
944 if (IS_ERR(tegra->ss_rst)) {
945 err = PTR_ERR(tegra->ss_rst);
946 dev_err(&pdev->dev, "failed to get xusb_ss reset: %d\n", err);
947 goto put_padctl;
948 }
949
950 tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");
951 if (IS_ERR(tegra->host_clk)) {
952 err = PTR_ERR(tegra->host_clk);
953 dev_err(&pdev->dev, "failed to get xusb_host: %d\n", err);
954 goto put_padctl;
955 }
956
957 tegra->falcon_clk = devm_clk_get(&pdev->dev, "xusb_falcon_src");
958 if (IS_ERR(tegra->falcon_clk)) {
959 err = PTR_ERR(tegra->falcon_clk);
960 dev_err(&pdev->dev, "failed to get xusb_falcon_src: %d\n", err);
961 goto put_padctl;
962 }
963
964 tegra->ss_clk = devm_clk_get(&pdev->dev, "xusb_ss");
965 if (IS_ERR(tegra->ss_clk)) {
966 err = PTR_ERR(tegra->ss_clk);
967 dev_err(&pdev->dev, "failed to get xusb_ss: %d\n", err);
968 goto put_padctl;
969 }
970
971 tegra->ss_src_clk = devm_clk_get(&pdev->dev, "xusb_ss_src");
972 if (IS_ERR(tegra->ss_src_clk)) {
973 err = PTR_ERR(tegra->ss_src_clk);
974 dev_err(&pdev->dev, "failed to get xusb_ss_src: %d\n", err);
975 goto put_padctl;
976 }
977
978 tegra->hs_src_clk = devm_clk_get(&pdev->dev, "xusb_hs_src");
979 if (IS_ERR(tegra->hs_src_clk)) {
980 err = PTR_ERR(tegra->hs_src_clk);
981 dev_err(&pdev->dev, "failed to get xusb_hs_src: %d\n", err);
982 goto put_padctl;
983 }
984
985 tegra->fs_src_clk = devm_clk_get(&pdev->dev, "xusb_fs_src");
986 if (IS_ERR(tegra->fs_src_clk)) {
987 err = PTR_ERR(tegra->fs_src_clk);
988 dev_err(&pdev->dev, "failed to get xusb_fs_src: %d\n", err);
989 goto put_padctl;
990 }
991
992 tegra->pll_u_480m = devm_clk_get(&pdev->dev, "pll_u_480m");
993 if (IS_ERR(tegra->pll_u_480m)) {
994 err = PTR_ERR(tegra->pll_u_480m);
995 dev_err(&pdev->dev, "failed to get pll_u_480m: %d\n", err);
996 goto put_padctl;
997 }
998
999 tegra->clk_m = devm_clk_get(&pdev->dev, "clk_m");
1000 if (IS_ERR(tegra->clk_m)) {
1001 err = PTR_ERR(tegra->clk_m);
1002 dev_err(&pdev->dev, "failed to get clk_m: %d\n", err);
1003 goto put_padctl;
1004 }
1005
1006 tegra->pll_e = devm_clk_get(&pdev->dev, "pll_e");
1007 if (IS_ERR(tegra->pll_e)) {
1008 err = PTR_ERR(tegra->pll_e);
1009 dev_err(&pdev->dev, "failed to get pll_e: %d\n", err);
1010 goto put_padctl;
1011 }
1012
1013 tegra->supplies = devm_kcalloc(&pdev->dev, tegra->soc->num_supplies,
1014 sizeof(*tegra->supplies), GFP_KERNEL);
1015 if (!tegra->supplies) {
1016 err = -ENOMEM;
1017 goto put_padctl;
1018 }
1019
1020 for (i = 0; i < tegra->soc->num_supplies; i++)
1021 tegra->supplies[i].supply = tegra->soc->supply_names[i];
1022
1023 err = devm_regulator_bulk_get(&pdev->dev, tegra->soc->num_supplies,
1024 tegra->supplies);
1025 if (err) {
1026 dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
1027 goto put_padctl;
1028 }
1029
1030 for (i = 0; i < tegra->soc->num_types; i++)
1031 tegra->num_phys += tegra->soc->phy_types[i].num;
1032
1033 tegra->phys = devm_kcalloc(&pdev->dev, tegra->num_phys,
1034 sizeof(*tegra->phys), GFP_KERNEL);
1035 if (!tegra->phys) {
1036 dev_err(&pdev->dev, "failed to allocate PHY array\n");
1037 err = -ENOMEM;
1038 goto put_padctl;
1039 }
1040
1041 for (i = 0, k = 0; i < tegra->soc->num_types; i++) {
1042 char prop[8];
1043
1044 for (j = 0; j < tegra->soc->phy_types[i].num; j++) {
1045 snprintf(prop, sizeof(prop), "%s-%d",
1046 tegra->soc->phy_types[i].name, j);
1047
1048 phy = devm_phy_optional_get(&pdev->dev, prop);
1049 if (IS_ERR(phy)) {
1050 dev_err(&pdev->dev,
1051 "failed to get PHY %s: %ld\n", prop,
1052 PTR_ERR(phy));
1053 err = PTR_ERR(phy);
1054 goto put_padctl;
1055 }
1056
1057 tegra->phys[k++] = phy;
1058 }
1059 }
1060
1061 err = tegra_xusb_clk_enable(tegra);
1062 if (err) {
1063 dev_err(&pdev->dev, "failed to enable clocks: %d\n", err);
1064 goto put_padctl;
1065 }
1066
1067 err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
1068 if (err) {
1069 dev_err(&pdev->dev, "failed to enable regulators: %d\n", err);
1070 goto disable_clk;
1071 }
1072
1073 err = tegra_xusb_phy_enable(tegra);
1074 if (err < 0) {
1075 dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err);
1076 goto disable_regulator;
1077 }
1078
1079 tegra_xusb_ipfs_config(tegra, regs);
1080
1081 err = tegra_xusb_load_firmware(tegra);
1082 if (err < 0) {
1083 dev_err(&pdev->dev, "failed to load firmware: %d\n", err);
1084 goto disable_phy;
1085 }
1086
1087 tegra->hcd = usb_create_hcd(&tegra_xhci_hc_driver, &pdev->dev,
1088 dev_name(&pdev->dev));
1089 if (!tegra->hcd) {
1090 err = -ENOMEM;
1091 goto disable_phy;
1092 }
1093
1094 /*
1095 * This must happen after usb_create_hcd(), because usb_create_hcd()
1096 * will overwrite the drvdata of the device with the hcd it creates.
1097 */
1098 platform_set_drvdata(pdev, tegra);
1099
1100 tegra->hcd->regs = tegra->regs;
1101 tegra->hcd->rsrc_start = regs->start;
1102 tegra->hcd->rsrc_len = resource_size(regs);
1103
1104 err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED);
1105 if (err < 0) {
1106 dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err);
1107 goto put_usb2;
1108 }
1109
1110 device_wakeup_enable(tegra->hcd->self.controller);
1111
1112 xhci = hcd_to_xhci(tegra->hcd);
1113
1114 xhci->shared_hcd = usb_create_shared_hcd(&tegra_xhci_hc_driver,
1115 &pdev->dev,
1116 dev_name(&pdev->dev),
1117 tegra->hcd);
1118 if (!xhci->shared_hcd) {
1119 dev_err(&pdev->dev, "failed to create shared HCD\n");
1120 goto remove_usb2;
1121 }
1122
1123 err = usb_add_hcd(xhci->shared_hcd, tegra->xhci_irq, IRQF_SHARED);
1124 if (err < 0) {
1125 dev_err(&pdev->dev, "failed to add shared HCD: %d\n", err);
1126 goto put_usb3;
1127 }
1128
1129 mutex_lock(&tegra->lock);
1130
1131 /* Enable firmware messages from controller. */
1132 msg.cmd = MBOX_CMD_MSG_ENABLED;
1133 msg.data = 0;
1134
1135 err = tegra_xusb_mbox_send(tegra, &msg);
1136 if (err < 0) {
1137 dev_err(&pdev->dev, "failed to enable messages: %d\n", err);
1138 mutex_unlock(&tegra->lock);
1139 goto remove_usb3;
1140 }
1141
1142 mutex_unlock(&tegra->lock);
1143
1144 err = devm_request_threaded_irq(&pdev->dev, tegra->mbox_irq,
1145 tegra_xusb_mbox_irq,
1146 tegra_xusb_mbox_thread, 0,
1147 dev_name(&pdev->dev), tegra);
1148 if (err < 0) {
1149 dev_err(&pdev->dev, "failed to request IRQ: %d\n", err);
1150 goto remove_usb3;
1151 }
1152
1153 return 0;
1154
1155remove_usb3:
1156 usb_remove_hcd(xhci->shared_hcd);
1157put_usb3:
1158 usb_put_hcd(xhci->shared_hcd);
1159remove_usb2:
1160 usb_remove_hcd(tegra->hcd);
1161put_usb2:
1162 usb_put_hcd(tegra->hcd);
1163disable_phy:
1164 tegra_xusb_phy_disable(tegra);
1165disable_regulator:
1166 regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
1167disable_clk:
1168 tegra_xusb_clk_disable(tegra);
1169put_padctl:
1170 tegra_xusb_padctl_put(tegra->padctl);
1171 return err;
1172}
1173
1174static int tegra_xusb_remove(struct platform_device *pdev)
1175{
1176 struct tegra_xusb *tegra = platform_get_drvdata(pdev);
1177 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1178
1179 usb_remove_hcd(xhci->shared_hcd);
1180 usb_put_hcd(xhci->shared_hcd);
1181 usb_remove_hcd(tegra->hcd);
1182 usb_put_hcd(tegra->hcd);
1183
1184 dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
1185 tegra->fw.phys);
1186
1187 tegra_xusb_phy_disable(tegra);
1188 regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
1189 tegra_xusb_clk_disable(tegra);
1190
1191 tegra_xusb_padctl_put(tegra->padctl);
1192
1193 return 0;
1194}
1195
1196#ifdef CONFIG_PM_SLEEP
1197static int tegra_xusb_suspend(struct device *dev)
1198{
1199 struct tegra_xusb *tegra = dev_get_drvdata(dev);
1200 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1201 bool wakeup = device_may_wakeup(dev);
1202
1203 /* TODO: Powergate controller across suspend/resume. */
1204 return xhci_suspend(xhci, wakeup);
1205}
1206
1207static int tegra_xusb_resume(struct device *dev)
1208{
1209 struct tegra_xusb *tegra = dev_get_drvdata(dev);
1210 struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
1211
1212 return xhci_resume(xhci, 0);
1213}
1214#endif
1215
1216static const struct dev_pm_ops tegra_xusb_pm_ops = {
1217 SET_SYSTEM_SLEEP_PM_OPS(tegra_xusb_suspend, tegra_xusb_resume)
1218};
1219
1220static const char * const tegra124_supply_names[] = {
1221 "avddio-pex",
1222 "dvddio-pex",
1223 "avdd-usb",
1224 "avdd-pll-utmip",
1225 "avdd-pll-erefe",
1226 "avdd-usb-ss-pll",
1227 "hvdd-usb-ss",
1228 "hvdd-usb-ss-pll-e",
1229};
1230
1231static const struct tegra_xusb_phy_type tegra124_phy_types[] = {
1232 { .name = "usb3", .num = 2, },
1233 { .name = "usb2", .num = 3, },
1234 { .name = "hsic", .num = 2, },
1235};
1236
1237static const struct tegra_xusb_soc tegra124_soc = {
1238 .firmware = "nvidia/tegra124/xusb.bin",
1239 .supply_names = tegra124_supply_names,
1240 .num_supplies = ARRAY_SIZE(tegra124_supply_names),
1241 .phy_types = tegra124_phy_types,
1242 .num_types = ARRAY_SIZE(tegra124_phy_types),
1243 .ports = {
1244 .usb2 = { .offset = 4, .count = 4, },
1245 .hsic = { .offset = 6, .count = 2, },
1246 .usb3 = { .offset = 0, .count = 2, },
1247 },
1248 .scale_ss_clock = true,
1249};
1250MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");
1251
1252static const char * const tegra210_supply_names[] = {
1253 "dvddio-pex",
1254 "hvddio-pex",
1255 "avdd-usb",
1256 "avdd-pll-utmip",
1257 "avdd-pll-uerefe",
1258 "dvdd-pex-pll",
1259 "hvdd-pex-pll-e",
1260};
1261
1262static const struct tegra_xusb_phy_type tegra210_phy_types[] = {
1263 { .name = "usb3", .num = 4, },
1264 { .name = "usb2", .num = 4, },
1265 { .name = "hsic", .num = 1, },
1266};
1267
1268static const struct tegra_xusb_soc tegra210_soc = {
1269 .firmware = "nvidia/tegra210/xusb.bin",
1270 .supply_names = tegra210_supply_names,
1271 .num_supplies = ARRAY_SIZE(tegra210_supply_names),
1272 .phy_types = tegra210_phy_types,
1273 .num_types = ARRAY_SIZE(tegra210_phy_types),
1274 .ports = {
1275 .usb2 = { .offset = 4, .count = 4, },
1276 .hsic = { .offset = 8, .count = 1, },
1277 .usb3 = { .offset = 0, .count = 4, },
1278 },
1279 .scale_ss_clock = false,
1280};
1281MODULE_FIRMWARE("nvidia/tegra210/xusb.bin");
1282
1283static const struct of_device_id tegra_xusb_of_match[] = {
1284 { .compatible = "nvidia,tegra124-xusb", .data = &tegra124_soc },
1285 { .compatible = "nvidia,tegra210-xusb", .data = &tegra210_soc },
1286 { },
1287};
1288MODULE_DEVICE_TABLE(of, tegra_xusb_of_match);
1289
1290static struct platform_driver tegra_xusb_driver = {
1291 .probe = tegra_xusb_probe,
1292 .remove = tegra_xusb_remove,
1293 .driver = {
1294 .name = "tegra-xusb",
1295 .pm = &tegra_xusb_pm_ops,
1296 .of_match_table = tegra_xusb_of_match,
1297 },
1298};
1299
1300static void tegra_xhci_quirks(struct device *dev, struct xhci_hcd *xhci)
1301{
1302 xhci->quirks |= XHCI_PLAT;
1303}
1304
1305static int tegra_xhci_setup(struct usb_hcd *hcd)
1306{
1307 return xhci_gen_setup(hcd, tegra_xhci_quirks);
1308}
1309
1310static const struct xhci_driver_overrides tegra_xhci_overrides __initconst = {
1311 .extra_priv_size = sizeof(struct xhci_hcd),
1312 .reset = tegra_xhci_setup,
1313};
1314
1315static int __init tegra_xusb_init(void)
1316{
1317 xhci_init_driver(&tegra_xhci_hc_driver, &tegra_xhci_overrides);
1318
1319 return platform_driver_register(&tegra_xusb_driver);
1320}
1321module_init(tegra_xusb_init);
1322
1323static void __exit tegra_xusb_exit(void)
1324{
1325 platform_driver_unregister(&tegra_xusb_driver);
1326}
1327module_exit(tegra_xusb_exit);
1328
1329MODULE_AUTHOR("Andrew Bresticker <abrestic@chromium.org>");
1330MODULE_DESCRIPTION("NVIDIA Tegra XUSB xHCI host-controller driver");
1331MODULE_LICENSE("GPL v2");
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-15 10:41:45 -0400