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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/usb/phy/phy-mxs-usb.c | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski:
"Core:
- Add dedicated kmem_cache for typical/small skb->head, avoid having
to access struct page at kfree time, and improve memory use.
- Introduce sysctl to set default RPS configuration for new netdevs.
- Define Netlink protocol specification format which can be used to
describe messages used by each family and auto-generate parsers.
Add tools for generating kernel data structures and uAPI headers.
- Expose all net/core sysctls inside netns.
- Remove 4s sleep in netpoll if carrier is instantly detected on
boot.
- Add configurable limit of MDB entries per port, and port-vlan.
- Continue populating drop reasons throughout the stack.
- Retire a handful of legacy Qdiscs and classifiers.
Protocols:
- Support IPv4 big TCP (TSO frames larger than 64kB).
- Add IP_LOCAL_PORT_RANGE socket option, to control local port range
on socket by socket basis.
- Track and report in procfs number of MPTCP sockets used.
- Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
manager.
- IPv6: don't check net.ipv6.route.max_size and rely on garbage
collection to free memory (similarly to IPv4).
- Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).
- ICMP: add per-rate limit counters.
- Add support for user scanning requests in ieee802154.
- Remove static WEP support.
- Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
reporting.
- WiFi 7 EHT channel puncturing support (client & AP).
BPF:
- Add a rbtree data structure following the "next-gen data structure"
precedent set by recently added linked list, that is, by using
kfunc + kptr instead of adding a new BPF map type.
- Expose XDP hints via kfuncs with initial support for RX hash and
timestamp metadata.
- Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
better support decap on GRE tunnel devices not operating in collect
metadata.
- Improve x86 JIT's codegen for PROBE_MEM runtime error checks.
- Remove the need for trace_printk_lock for bpf_trace_printk and
bpf_trace_vprintk helpers.
- Extend libbpf's bpf_tracing.h support for tracing arguments of
kprobes/uprobes and syscall as a special case.
- Significantly reduce the search time for module symbols by
livepatch and BPF.
- Enable cpumasks to be used as kptrs, which is useful for tracing
programs tracking which tasks end up running on which CPUs in
different time intervals.
- Add support for BPF trampoline on s390x and riscv64.
- Add capability to export the XDP features supported by the NIC.
- Add __bpf_kfunc tag for marking kernel functions as kfuncs.
- Add cgroup.memory=nobpf kernel parameter option to disable BPF
memory accounting for container environments.
Netfilter:
- Remove the CLUSTERIP target. It has been marked as obsolete for
years, and we still have WARN splats wrt races of the out-of-band
/proc interface installed by this target.
- Add 'destroy' commands to nf_tables. They are identical to the
existing 'delete' commands, but do not return an error if the
referenced object (set, chain, rule...) did not exist.
Driver API:
- Improve cpumask_local_spread() locality to help NICs set the right
IRQ affinity on AMD platforms.
- Separate C22 and C45 MDIO bus transactions more clearly.
- Introduce new DCB table to control DSCP rewrite on egress.
- Support configuration of Physical Layer Collision Avoidance (PLCA)
Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
shared medium Ethernet.
- Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
preemption of low priority frames by high priority frames.
- Add support for controlling MACSec offload using netlink SET.
- Rework devlink instance refcounts to allow registration and
de-registration under the instance lock. Split the code into
multiple files, drop some of the unnecessarily granular locks and
factor out common parts of netlink operation handling.
- Add TX frame aggregation parameters (for USB drivers).
- Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
messages with notifications for debug.
- Allow offloading of UDP NEW connections via act_ct.
- Add support for per action HW stats in TC.
- Support hardware miss to TC action (continue processing in SW from
a specific point in the action chain).
- Warn if old Wireless Extension user space interface is used with
modern cfg80211/mac80211 drivers. Do not support Wireless
Extensions for Wi-Fi 7 devices at all. Everyone should switch to
using nl80211 interface instead.
- Improve the CAN bit timing configuration. Use extack to return
error messages directly to user space, update the SJW handling,
including the definition of a new default value that will benefit
CAN-FD controllers, by increasing their oscillator tolerance.
New hardware / drivers:
- Ethernet:
- nVidia BlueField-3 support (control traffic driver)
- Ethernet support for imx93 SoCs
- Motorcomm yt8531 gigabit Ethernet PHY
- onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
- Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
- Amlogic gxl MDIO mux
- WiFi:
- RealTek RTL8188EU (rtl8xxxu)
- Qualcomm Wi-Fi 7 devices (ath12k)
- CAN:
- Renesas R-Car V4H
Drivers:
- Bluetooth:
- Set Per Platform Antenna Gain (PPAG) for Intel controllers.
- Ethernet NICs:
- Intel (1G, igc):
- support TSN / Qbv / packet scheduling features of i226 model
- Intel (100G, ice):
- use GNSS subsystem instead of TTY
- multi-buffer XDP support
- extend support for GPIO pins to E823 devices
- nVidia/Mellanox:
- update the shared buffer configuration on PFC commands
- implement PTP adjphase function for HW offset control
- TC support for Geneve and GRE with VF tunnel offload
- more efficient crypto key management method
- multi-port eswitch support
- Netronome/Corigine:
- add DCB IEEE support
- support IPsec offloading for NFP3800
- Freescale/NXP (enetc):
- support XDP_REDIRECT for XDP non-linear buffers
- improve reconfig, avoid link flap and waiting for idle
- support MAC Merge layer
- Other NICs:
- sfc/ef100: add basic devlink support for ef100
- ionic: rx_push mode operation (writing descriptors via MMIO)
- bnxt: use the auxiliary bus abstraction for RDMA
- r8169: disable ASPM and reset bus in case of tx timeout
- cpsw: support QSGMII mode for J721e CPSW9G
- cpts: support pulse-per-second output
- ngbe: add an mdio bus driver
- usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
- r8152: handle devices with FW with NCM support
- amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
- virtio-net: support multi buffer XDP
- virtio/vsock: replace virtio_vsock_pkt with sk_buff
- tsnep: XDP support
- Ethernet high-speed switches:
- nVidia/Mellanox (mlxsw):
- add support for latency TLV (in FW control messages)
- Microchip (sparx5):
- separate explicit and implicit traffic forwarding rules, make
the implicit rules always active
- add support for egress DSCP rewrite
- IS0 VCAP support (Ingress Classification)
- IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
etc.)
- ES2 VCAP support (Egress Access Control)
- support for Per-Stream Filtering and Policing (802.1Q,
8.6.5.1)
- Ethernet embedded switches:
- Marvell (mv88e6xxx):
- add MAB (port auth) offload support
- enable PTP receive for mv88e6390
- NXP (ocelot):
- support MAC Merge layer
- support for the the vsc7512 internal copper phys
- Microchip:
- lan9303: convert to PHYLINK
- lan966x: support TC flower filter statistics
- lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
- lan937x: support Credit Based Shaper configuration
- ksz9477: support Energy Efficient Ethernet
- other:
- qca8k: convert to regmap read/write API, use bulk operations
- rswitch: Improve TX timestamp accuracy
- Intel WiFi (iwlwifi):
- EHT (Wi-Fi 7) rate reporting
- STEP equalizer support: transfer some STEP (connection to radio
on platforms with integrated wifi) related parameters from the
BIOS to the firmware.
- Qualcomm 802.11ax WiFi (ath11k):
- IPQ5018 support
- Fine Timing Measurement (FTM) responder role support
- channel 177 support
- MediaTek WiFi (mt76):
- per-PHY LED support
- mt7996: EHT (Wi-Fi 7) support
- Wireless Ethernet Dispatch (WED) reset support
- switch to using page pool allocator
- RealTek WiFi (rtw89):
- support new version of Bluetooth co-existance
- Mobile:
- rmnet: support TX aggregation"
* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
page_pool: add a comment explaining the fragment counter usage
net: ethtool: fix __ethtool_dev_mm_supported() implementation
ethtool: pse-pd: Fix double word in comments
xsk: add linux/vmalloc.h to xsk.c
sefltests: netdevsim: wait for devlink instance after netns removal
selftest: fib_tests: Always cleanup before exit
net/mlx5e: Align IPsec ASO result memory to be as required by hardware
net/mlx5e: TC, Set CT miss to the specific ct action instance
net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
net/mlx5: Refactor tc miss handling to a single function
net/mlx5: Kconfig: Make tc offload depend on tc skb extension
net/sched: flower: Support hardware miss to tc action
net/sched: flower: Move filter handle initialization earlier
net/sched: cls_api: Support hardware miss to tc action
net/sched: Rename user cookie and act cookie
sfc: fix builds without CONFIG_RTC_LIB
sfc: clean up some inconsistent indentings
net/mlx4_en: Introduce flexible array to silence overflow warning
net: lan966x: Fix possible deadlock inside PTP
net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
...
Diffstat (limited to '')
-rw-r--r-- | drivers/usb/phy/phy-mxs-usb.c | 880 |
1 files changed, 880 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c new file mode 100644 index 000000000..d2836ef5d --- /dev/null +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -0,0 +1,880 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2012-2014 Freescale Semiconductor, Inc. + * Copyright (C) 2012 Marek Vasut <marex@denx.de> + * on behalf of DENX Software Engineering GmbH + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/usb/otg.h> +#include <linux/stmp_device.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/of_device.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> +#include <linux/iopoll.h> + +#define DRIVER_NAME "mxs_phy" + +/* Register Macro */ +#define HW_USBPHY_PWD 0x00 +#define HW_USBPHY_TX 0x10 +#define HW_USBPHY_CTRL 0x30 +#define HW_USBPHY_CTRL_SET 0x34 +#define HW_USBPHY_CTRL_CLR 0x38 + +#define HW_USBPHY_DEBUG_SET 0x54 +#define HW_USBPHY_DEBUG_CLR 0x58 + +#define HW_USBPHY_IP 0x90 +#define HW_USBPHY_IP_SET 0x94 +#define HW_USBPHY_IP_CLR 0x98 + +#define GM_USBPHY_TX_TXCAL45DP(x) (((x) & 0xf) << 16) +#define GM_USBPHY_TX_TXCAL45DN(x) (((x) & 0xf) << 8) +#define GM_USBPHY_TX_D_CAL(x) (((x) & 0xf) << 0) + +/* imx7ulp */ +#define HW_USBPHY_PLL_SIC 0xa0 +#define HW_USBPHY_PLL_SIC_SET 0xa4 +#define HW_USBPHY_PLL_SIC_CLR 0xa8 + +#define BM_USBPHY_CTRL_SFTRST BIT(31) +#define BM_USBPHY_CTRL_CLKGATE BIT(30) +#define BM_USBPHY_CTRL_OTG_ID_VALUE BIT(27) +#define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS BIT(26) +#define BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE BIT(25) +#define BM_USBPHY_CTRL_ENVBUSCHG_WKUP BIT(23) +#define BM_USBPHY_CTRL_ENIDCHG_WKUP BIT(22) +#define BM_USBPHY_CTRL_ENDPDMCHG_WKUP BIT(21) +#define BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD BIT(20) +#define BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE BIT(19) +#define BM_USBPHY_CTRL_ENAUTO_PWRON_PLL BIT(18) +#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15) +#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14) +#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1) + +#define BM_USBPHY_IP_FIX (BIT(17) | BIT(18)) + +#define BM_USBPHY_DEBUG_CLKGATE BIT(30) +/* imx7ulp */ +#define BM_USBPHY_PLL_LOCK BIT(31) +#define BM_USBPHY_PLL_REG_ENABLE BIT(21) +#define BM_USBPHY_PLL_BYPASS BIT(16) +#define BM_USBPHY_PLL_POWER BIT(12) +#define BM_USBPHY_PLL_EN_USB_CLKS BIT(6) + +/* Anatop Registers */ +#define ANADIG_ANA_MISC0 0x150 +#define ANADIG_ANA_MISC0_SET 0x154 +#define ANADIG_ANA_MISC0_CLR 0x158 + +#define ANADIG_USB1_CHRG_DETECT_SET 0x1b4 +#define ANADIG_USB1_CHRG_DETECT_CLR 0x1b8 +#define ANADIG_USB2_CHRG_DETECT_SET 0x214 +#define ANADIG_USB1_CHRG_DETECT_EN_B BIT(20) +#define ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B BIT(19) +#define ANADIG_USB1_CHRG_DETECT_CHK_CONTACT BIT(18) + +#define ANADIG_USB1_VBUS_DET_STAT 0x1c0 +#define ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3) + +#define ANADIG_USB1_CHRG_DET_STAT 0x1d0 +#define ANADIG_USB1_CHRG_DET_STAT_DM_STATE BIT(2) +#define ANADIG_USB1_CHRG_DET_STAT_CHRG_DETECTED BIT(1) +#define ANADIG_USB1_CHRG_DET_STAT_PLUG_CONTACT BIT(0) + +#define ANADIG_USB2_VBUS_DET_STAT 0x220 + +#define ANADIG_USB1_LOOPBACK_SET 0x1e4 +#define ANADIG_USB1_LOOPBACK_CLR 0x1e8 +#define ANADIG_USB1_LOOPBACK_UTMI_TESTSTART BIT(0) + +#define ANADIG_USB2_LOOPBACK_SET 0x244 +#define ANADIG_USB2_LOOPBACK_CLR 0x248 + +#define ANADIG_USB1_MISC 0x1f0 +#define ANADIG_USB2_MISC 0x250 + +#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG BIT(12) +#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL BIT(11) + +#define BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3) +#define BM_ANADIG_USB2_VBUS_DET_STAT_VBUS_VALID BIT(3) + +#define BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 BIT(2) +#define BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN BIT(5) +#define BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 BIT(2) +#define BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN BIT(5) + +#define BM_ANADIG_USB1_MISC_RX_VPIN_FS BIT(29) +#define BM_ANADIG_USB1_MISC_RX_VMIN_FS BIT(28) +#define BM_ANADIG_USB2_MISC_RX_VPIN_FS BIT(29) +#define BM_ANADIG_USB2_MISC_RX_VMIN_FS BIT(28) + +#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) + +/* Do disconnection between PHY and controller without vbus */ +#define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS BIT(0) + +/* + * The PHY will be in messy if there is a wakeup after putting + * bus to suspend (set portsc.suspendM) but before setting PHY to low + * power mode (set portsc.phcd). + */ +#define MXS_PHY_ABNORMAL_IN_SUSPEND BIT(1) + +/* + * The SOF sends too fast after resuming, it will cause disconnection + * between host and high speed device. + */ +#define MXS_PHY_SENDING_SOF_TOO_FAST BIT(2) + +/* + * IC has bug fixes logic, they include + * MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST + * which are described at above flags, the RTL will handle it + * according to different versions. + */ +#define MXS_PHY_NEED_IP_FIX BIT(3) + +/* Minimum and maximum values for device tree entries */ +#define MXS_PHY_TX_CAL45_MIN 35 +#define MXS_PHY_TX_CAL45_MAX 54 +#define MXS_PHY_TX_D_CAL_MIN 79 +#define MXS_PHY_TX_D_CAL_MAX 119 + +struct mxs_phy_data { + unsigned int flags; +}; + +static const struct mxs_phy_data imx23_phy_data = { + .flags = MXS_PHY_ABNORMAL_IN_SUSPEND | MXS_PHY_SENDING_SOF_TOO_FAST, +}; + +static const struct mxs_phy_data imx6q_phy_data = { + .flags = MXS_PHY_SENDING_SOF_TOO_FAST | + MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | + MXS_PHY_NEED_IP_FIX, +}; + +static const struct mxs_phy_data imx6sl_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | + MXS_PHY_NEED_IP_FIX, +}; + +static const struct mxs_phy_data vf610_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | + MXS_PHY_NEED_IP_FIX, +}; + +static const struct mxs_phy_data imx6sx_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, +}; + +static const struct mxs_phy_data imx6ul_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, +}; + +static const struct mxs_phy_data imx7ulp_phy_data = { +}; + +static const struct of_device_id mxs_phy_dt_ids[] = { + { .compatible = "fsl,imx6sx-usbphy", .data = &imx6sx_phy_data, }, + { .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, }, + { .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, }, + { .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, }, + { .compatible = "fsl,vf610-usbphy", .data = &vf610_phy_data, }, + { .compatible = "fsl,imx6ul-usbphy", .data = &imx6ul_phy_data, }, + { .compatible = "fsl,imx7ulp-usbphy", .data = &imx7ulp_phy_data, }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids); + +struct mxs_phy { + struct usb_phy phy; + struct clk *clk; + const struct mxs_phy_data *data; + struct regmap *regmap_anatop; + int port_id; + u32 tx_reg_set; + u32 tx_reg_mask; +}; + +static inline bool is_imx6q_phy(struct mxs_phy *mxs_phy) +{ + return mxs_phy->data == &imx6q_phy_data; +} + +static inline bool is_imx6sl_phy(struct mxs_phy *mxs_phy) +{ + return mxs_phy->data == &imx6sl_phy_data; +} + +static inline bool is_imx7ulp_phy(struct mxs_phy *mxs_phy) +{ + return mxs_phy->data == &imx7ulp_phy_data; +} + +/* + * PHY needs some 32K cycles to switch from 32K clock to + * bus (such as AHB/AXI, etc) clock. + */ +static void mxs_phy_clock_switch_delay(void) +{ + usleep_range(300, 400); +} + +static void mxs_phy_tx_init(struct mxs_phy *mxs_phy) +{ + void __iomem *base = mxs_phy->phy.io_priv; + u32 phytx; + + /* Update TX register if there is anything to write */ + if (mxs_phy->tx_reg_mask) { + phytx = readl(base + HW_USBPHY_TX); + phytx &= ~mxs_phy->tx_reg_mask; + phytx |= mxs_phy->tx_reg_set; + writel(phytx, base + HW_USBPHY_TX); + } +} + +static int mxs_phy_pll_enable(void __iomem *base, bool enable) +{ + int ret = 0; + + if (enable) { + u32 value; + + writel(BM_USBPHY_PLL_REG_ENABLE, base + HW_USBPHY_PLL_SIC_SET); + writel(BM_USBPHY_PLL_BYPASS, base + HW_USBPHY_PLL_SIC_CLR); + writel(BM_USBPHY_PLL_POWER, base + HW_USBPHY_PLL_SIC_SET); + ret = readl_poll_timeout(base + HW_USBPHY_PLL_SIC, + value, (value & BM_USBPHY_PLL_LOCK) != 0, + 100, 10000); + if (ret) + return ret; + + writel(BM_USBPHY_PLL_EN_USB_CLKS, base + + HW_USBPHY_PLL_SIC_SET); + } else { + writel(BM_USBPHY_PLL_EN_USB_CLKS, base + + HW_USBPHY_PLL_SIC_CLR); + writel(BM_USBPHY_PLL_POWER, base + HW_USBPHY_PLL_SIC_CLR); + writel(BM_USBPHY_PLL_BYPASS, base + HW_USBPHY_PLL_SIC_SET); + writel(BM_USBPHY_PLL_REG_ENABLE, base + HW_USBPHY_PLL_SIC_CLR); + } + + return ret; +} + +static int mxs_phy_hw_init(struct mxs_phy *mxs_phy) +{ + int ret; + void __iomem *base = mxs_phy->phy.io_priv; + + if (is_imx7ulp_phy(mxs_phy)) { + ret = mxs_phy_pll_enable(base, true); + if (ret) + return ret; + } + + ret = stmp_reset_block(base + HW_USBPHY_CTRL); + if (ret) + goto disable_pll; + + /* Power up the PHY */ + writel(0, base + HW_USBPHY_PWD); + + /* + * USB PHY Ctrl Setting + * - Auto clock/power on + * - Enable full/low speed support + */ + writel(BM_USBPHY_CTRL_ENAUTOSET_USBCLKS | + BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE | + BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD | + BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE | + BM_USBPHY_CTRL_ENAUTO_PWRON_PLL | + BM_USBPHY_CTRL_ENUTMILEVEL2 | + BM_USBPHY_CTRL_ENUTMILEVEL3, + base + HW_USBPHY_CTRL_SET); + + if (mxs_phy->data->flags & MXS_PHY_NEED_IP_FIX) + writel(BM_USBPHY_IP_FIX, base + HW_USBPHY_IP_SET); + + if (mxs_phy->regmap_anatop) { + unsigned int reg = mxs_phy->port_id ? + ANADIG_USB1_CHRG_DETECT_SET : + ANADIG_USB2_CHRG_DETECT_SET; + /* + * The external charger detector needs to be disabled, + * or the signal at DP will be poor + */ + regmap_write(mxs_phy->regmap_anatop, reg, + ANADIG_USB1_CHRG_DETECT_EN_B | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + } + + mxs_phy_tx_init(mxs_phy); + + return 0; + +disable_pll: + if (is_imx7ulp_phy(mxs_phy)) + mxs_phy_pll_enable(base, false); + return ret; +} + +/* Return true if the vbus is there */ +static bool mxs_phy_get_vbus_status(struct mxs_phy *mxs_phy) +{ + unsigned int vbus_value = 0; + + if (!mxs_phy->regmap_anatop) + return false; + + if (mxs_phy->port_id == 0) + regmap_read(mxs_phy->regmap_anatop, + ANADIG_USB1_VBUS_DET_STAT, + &vbus_value); + else if (mxs_phy->port_id == 1) + regmap_read(mxs_phy->regmap_anatop, + ANADIG_USB2_VBUS_DET_STAT, + &vbus_value); + + if (vbus_value & BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID) + return true; + else + return false; +} + +static void __mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool disconnect) +{ + void __iomem *base = mxs_phy->phy.io_priv; + u32 reg; + + if (disconnect) + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_CLR); + + if (mxs_phy->port_id == 0) { + reg = disconnect ? ANADIG_USB1_LOOPBACK_SET + : ANADIG_USB1_LOOPBACK_CLR; + regmap_write(mxs_phy->regmap_anatop, reg, + BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 | + BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN); + } else if (mxs_phy->port_id == 1) { + reg = disconnect ? ANADIG_USB2_LOOPBACK_SET + : ANADIG_USB2_LOOPBACK_CLR; + regmap_write(mxs_phy->regmap_anatop, reg, + BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 | + BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN); + } + + if (!disconnect) + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_SET); + + /* Delay some time, and let Linestate be SE0 for controller */ + if (disconnect) + usleep_range(500, 1000); +} + +static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy) +{ + void __iomem *base = mxs_phy->phy.io_priv; + u32 phyctrl = readl(base + HW_USBPHY_CTRL); + + if (IS_ENABLED(CONFIG_USB_OTG) && + !(phyctrl & BM_USBPHY_CTRL_OTG_ID_VALUE)) + return true; + + return false; +} + +static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on) +{ + bool vbus_is_on = false; + + /* If the SoCs don't need to disconnect line without vbus, quit */ + if (!(mxs_phy->data->flags & MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS)) + return; + + /* If the SoCs don't have anatop, quit */ + if (!mxs_phy->regmap_anatop) + return; + + vbus_is_on = mxs_phy_get_vbus_status(mxs_phy); + + if (on && !vbus_is_on && !mxs_phy_is_otg_host(mxs_phy)) + __mxs_phy_disconnect_line(mxs_phy, true); + else + __mxs_phy_disconnect_line(mxs_phy, false); + +} + +static int mxs_phy_init(struct usb_phy *phy) +{ + int ret; + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + + mxs_phy_clock_switch_delay(); + ret = clk_prepare_enable(mxs_phy->clk); + if (ret) + return ret; + + return mxs_phy_hw_init(mxs_phy); +} + +static void mxs_phy_shutdown(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP | + BM_USBPHY_CTRL_ENDPDMCHG_WKUP | + BM_USBPHY_CTRL_ENIDCHG_WKUP | + BM_USBPHY_CTRL_ENAUTOSET_USBCLKS | + BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE | + BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD | + BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE | + BM_USBPHY_CTRL_ENAUTO_PWRON_PLL; + + writel(value, phy->io_priv + HW_USBPHY_CTRL_CLR); + writel(0xffffffff, phy->io_priv + HW_USBPHY_PWD); + + writel(BM_USBPHY_CTRL_CLKGATE, + phy->io_priv + HW_USBPHY_CTRL_SET); + + if (is_imx7ulp_phy(mxs_phy)) + mxs_phy_pll_enable(phy->io_priv, false); + + clk_disable_unprepare(mxs_phy->clk); +} + +static bool mxs_phy_is_low_speed_connection(struct mxs_phy *mxs_phy) +{ + unsigned int line_state; + /* bit definition is the same for all controllers */ + unsigned int dp_bit = BM_ANADIG_USB1_MISC_RX_VPIN_FS, + dm_bit = BM_ANADIG_USB1_MISC_RX_VMIN_FS; + unsigned int reg = ANADIG_USB1_MISC; + + /* If the SoCs don't have anatop, quit */ + if (!mxs_phy->regmap_anatop) + return false; + + if (mxs_phy->port_id == 0) + reg = ANADIG_USB1_MISC; + else if (mxs_phy->port_id == 1) + reg = ANADIG_USB2_MISC; + + regmap_read(mxs_phy->regmap_anatop, reg, &line_state); + + if ((line_state & (dp_bit | dm_bit)) == dm_bit) + return true; + else + return false; +} + +static int mxs_phy_suspend(struct usb_phy *x, int suspend) +{ + int ret; + struct mxs_phy *mxs_phy = to_mxs_phy(x); + bool low_speed_connection, vbus_is_on; + + low_speed_connection = mxs_phy_is_low_speed_connection(mxs_phy); + vbus_is_on = mxs_phy_get_vbus_status(mxs_phy); + + if (suspend) { + /* + * FIXME: Do not power down RXPWD1PT1 bit for low speed + * connect. The low speed connection will have problem at + * very rare cases during usb suspend and resume process. + */ + if (low_speed_connection & vbus_is_on) { + /* + * If value to be set as pwd value is not 0xffffffff, + * several 32Khz cycles are needed. + */ + mxs_phy_clock_switch_delay(); + writel(0xffbfffff, x->io_priv + HW_USBPHY_PWD); + } else { + writel(0xffffffff, x->io_priv + HW_USBPHY_PWD); + } + writel(BM_USBPHY_CTRL_CLKGATE, + x->io_priv + HW_USBPHY_CTRL_SET); + clk_disable_unprepare(mxs_phy->clk); + } else { + mxs_phy_clock_switch_delay(); + ret = clk_prepare_enable(mxs_phy->clk); + if (ret) + return ret; + writel(BM_USBPHY_CTRL_CLKGATE, + x->io_priv + HW_USBPHY_CTRL_CLR); + writel(0, x->io_priv + HW_USBPHY_PWD); + } + + return 0; +} + +static int mxs_phy_set_wakeup(struct usb_phy *x, bool enabled) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(x); + u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP | + BM_USBPHY_CTRL_ENDPDMCHG_WKUP | + BM_USBPHY_CTRL_ENIDCHG_WKUP; + if (enabled) { + mxs_phy_disconnect_line(mxs_phy, true); + writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_SET); + } else { + writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_CLR); + mxs_phy_disconnect_line(mxs_phy, false); + } + + return 0; +} + +static int mxs_phy_on_connect(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "%s device has connected\n", + (speed == USB_SPEED_HIGH) ? "HS" : "FS/LS"); + + if (speed == USB_SPEED_HIGH) + writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_SET); + + return 0; +} + +static int mxs_phy_on_disconnect(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "%s device has disconnected\n", + (speed == USB_SPEED_HIGH) ? "HS" : "FS/LS"); + + /* Sometimes, the speed is not high speed when the error occurs */ + if (readl(phy->io_priv + HW_USBPHY_CTRL) & + BM_USBPHY_CTRL_ENHOSTDISCONDETECT) + writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_CLR); + + return 0; +} + +#define MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT 100 +static int mxs_charger_data_contact_detect(struct mxs_phy *x) +{ + struct regmap *regmap = x->regmap_anatop; + int i, stable_contact_count = 0; + u32 val; + + /* Check if vbus is valid */ + regmap_read(regmap, ANADIG_USB1_VBUS_DET_STAT, &val); + if (!(val & ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID)) { + dev_err(x->phy.dev, "vbus is not valid\n"); + return -EINVAL; + } + + /* Enable charger detector */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_CLR, + ANADIG_USB1_CHRG_DETECT_EN_B); + /* + * - Do not check whether a charger is connected to the USB port + * - Check whether the USB plug has been in contact with each other + */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, + ANADIG_USB1_CHRG_DETECT_CHK_CONTACT | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + + /* Check if plug is connected */ + for (i = 0; i < MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT; i++) { + regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); + if (val & ANADIG_USB1_CHRG_DET_STAT_PLUG_CONTACT) { + stable_contact_count++; + if (stable_contact_count > 5) + /* Data pin makes contact */ + break; + else + usleep_range(5000, 10000); + } else { + stable_contact_count = 0; + usleep_range(5000, 6000); + } + } + + if (i == MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT) { + dev_err(x->phy.dev, + "Data pin can't make good contact.\n"); + /* Disable charger detector */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, + ANADIG_USB1_CHRG_DETECT_EN_B | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + return -ENXIO; + } + + return 0; +} + +static enum usb_charger_type mxs_charger_primary_detection(struct mxs_phy *x) +{ + struct regmap *regmap = x->regmap_anatop; + enum usb_charger_type chgr_type = UNKNOWN_TYPE; + u32 val; + + /* + * - Do check whether a charger is connected to the USB port + * - Do not Check whether the USB plug has been in contact with + * each other + */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_CLR, + ANADIG_USB1_CHRG_DETECT_CHK_CONTACT | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + + msleep(100); + + /* Check if it is a charger */ + regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); + if (!(val & ANADIG_USB1_CHRG_DET_STAT_CHRG_DETECTED)) { + chgr_type = SDP_TYPE; + dev_dbg(x->phy.dev, "It is a standard downstream port\n"); + } + + /* Disable charger detector */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, + ANADIG_USB1_CHRG_DETECT_EN_B | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + + return chgr_type; +} + +/* + * It must be called after DP is pulled up, which is used to + * differentiate DCP and CDP. + */ +static enum usb_charger_type mxs_charger_secondary_detection(struct mxs_phy *x) +{ + struct regmap *regmap = x->regmap_anatop; + int val; + + msleep(80); + + regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); + if (val & ANADIG_USB1_CHRG_DET_STAT_DM_STATE) { + dev_dbg(x->phy.dev, "It is a dedicate charging port\n"); + return DCP_TYPE; + } else { + dev_dbg(x->phy.dev, "It is a charging downstream port\n"); + return CDP_TYPE; + } +} + +static enum usb_charger_type mxs_phy_charger_detect(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + struct regmap *regmap = mxs_phy->regmap_anatop; + void __iomem *base = phy->io_priv; + enum usb_charger_type chgr_type = UNKNOWN_TYPE; + + if (!regmap) + return UNKNOWN_TYPE; + + if (mxs_charger_data_contact_detect(mxs_phy)) + return chgr_type; + + chgr_type = mxs_charger_primary_detection(mxs_phy); + + if (chgr_type != SDP_TYPE) { + /* Pull up DP via test */ + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_CLR); + regmap_write(regmap, ANADIG_USB1_LOOPBACK_SET, + ANADIG_USB1_LOOPBACK_UTMI_TESTSTART); + + chgr_type = mxs_charger_secondary_detection(mxs_phy); + + /* Stop the test */ + regmap_write(regmap, ANADIG_USB1_LOOPBACK_CLR, + ANADIG_USB1_LOOPBACK_UTMI_TESTSTART); + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_SET); + } + + return chgr_type; +} + +static int mxs_phy_probe(struct platform_device *pdev) +{ + void __iomem *base; + struct clk *clk; + struct mxs_phy *mxs_phy; + int ret; + struct device_node *np = pdev->dev.of_node; + u32 val; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, + "can't get the clock, err=%ld", PTR_ERR(clk)); + return PTR_ERR(clk); + } + + mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL); + if (!mxs_phy) + return -ENOMEM; + + /* Some SoCs don't have anatop registers */ + if (of_get_property(np, "fsl,anatop", NULL)) { + mxs_phy->regmap_anatop = syscon_regmap_lookup_by_phandle + (np, "fsl,anatop"); + if (IS_ERR(mxs_phy->regmap_anatop)) { + dev_dbg(&pdev->dev, + "failed to find regmap for anatop\n"); + return PTR_ERR(mxs_phy->regmap_anatop); + } + } + + /* Precompute which bits of the TX register are to be updated, if any */ + if (!of_property_read_u32(np, "fsl,tx-cal-45-dn-ohms", &val) && + val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) { + /* Scale to a 4-bit value */ + val = (MXS_PHY_TX_CAL45_MAX - val) * 0xF + / (MXS_PHY_TX_CAL45_MAX - MXS_PHY_TX_CAL45_MIN); + mxs_phy->tx_reg_mask |= GM_USBPHY_TX_TXCAL45DN(~0); + mxs_phy->tx_reg_set |= GM_USBPHY_TX_TXCAL45DN(val); + } + + if (!of_property_read_u32(np, "fsl,tx-cal-45-dp-ohms", &val) && + val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) { + /* Scale to a 4-bit value. */ + val = (MXS_PHY_TX_CAL45_MAX - val) * 0xF + / (MXS_PHY_TX_CAL45_MAX - MXS_PHY_TX_CAL45_MIN); + mxs_phy->tx_reg_mask |= GM_USBPHY_TX_TXCAL45DP(~0); + mxs_phy->tx_reg_set |= GM_USBPHY_TX_TXCAL45DP(val); + } + + if (!of_property_read_u32(np, "fsl,tx-d-cal", &val) && + val >= MXS_PHY_TX_D_CAL_MIN && val <= MXS_PHY_TX_D_CAL_MAX) { + /* Scale to a 4-bit value. Round up the values and heavily + * weight the rounding by adding 2/3 of the denominator. + */ + val = ((MXS_PHY_TX_D_CAL_MAX - val) * 0xF + + (MXS_PHY_TX_D_CAL_MAX - MXS_PHY_TX_D_CAL_MIN) * 2/3) + / (MXS_PHY_TX_D_CAL_MAX - MXS_PHY_TX_D_CAL_MIN); + mxs_phy->tx_reg_mask |= GM_USBPHY_TX_D_CAL(~0); + mxs_phy->tx_reg_set |= GM_USBPHY_TX_D_CAL(val); + } + + ret = of_alias_get_id(np, "usbphy"); + if (ret < 0) + dev_dbg(&pdev->dev, "failed to get alias id, errno %d\n", ret); + mxs_phy->port_id = ret; + + mxs_phy->phy.io_priv = base; + mxs_phy->phy.dev = &pdev->dev; + mxs_phy->phy.label = DRIVER_NAME; + mxs_phy->phy.init = mxs_phy_init; + mxs_phy->phy.shutdown = mxs_phy_shutdown; + mxs_phy->phy.set_suspend = mxs_phy_suspend; + mxs_phy->phy.notify_connect = mxs_phy_on_connect; + mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect; + mxs_phy->phy.type = USB_PHY_TYPE_USB2; + mxs_phy->phy.set_wakeup = mxs_phy_set_wakeup; + mxs_phy->phy.charger_detect = mxs_phy_charger_detect; + + mxs_phy->clk = clk; + mxs_phy->data = of_device_get_match_data(&pdev->dev); + + platform_set_drvdata(pdev, mxs_phy); + + device_set_wakeup_capable(&pdev->dev, true); + + return usb_add_phy_dev(&mxs_phy->phy); +} + +static int mxs_phy_remove(struct platform_device *pdev) +{ + struct mxs_phy *mxs_phy = platform_get_drvdata(pdev); + + usb_remove_phy(&mxs_phy->phy); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on) +{ + unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; + + /* If the SoCs don't have anatop, quit */ + if (!mxs_phy->regmap_anatop) + return; + + if (is_imx6q_phy(mxs_phy)) + regmap_write(mxs_phy->regmap_anatop, reg, + BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG); + else if (is_imx6sl_phy(mxs_phy)) + regmap_write(mxs_phy->regmap_anatop, + reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL); +} + +static int mxs_phy_system_suspend(struct device *dev) +{ + struct mxs_phy *mxs_phy = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + mxs_phy_enable_ldo_in_suspend(mxs_phy, true); + + return 0; +} + +static int mxs_phy_system_resume(struct device *dev) +{ + struct mxs_phy *mxs_phy = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + mxs_phy_enable_ldo_in_suspend(mxs_phy, false); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(mxs_phy_pm, mxs_phy_system_suspend, + mxs_phy_system_resume); + +static struct platform_driver mxs_phy_driver = { + .probe = mxs_phy_probe, + .remove = mxs_phy_remove, + .driver = { + .name = DRIVER_NAME, + .of_match_table = mxs_phy_dt_ids, + .pm = &mxs_phy_pm, + }, +}; + +static int __init mxs_phy_module_init(void) +{ + return platform_driver_register(&mxs_phy_driver); +} +postcore_initcall(mxs_phy_module_init); + +static void __exit mxs_phy_module_exit(void) +{ + platform_driver_unregister(&mxs_phy_driver); +} +module_exit(mxs_phy_module_exit); + +MODULE_ALIAS("platform:mxs-usb-phy"); +MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); +MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); +MODULE_DESCRIPTION("Freescale MXS USB PHY driver"); +MODULE_LICENSE("GPL"); |