diff options
author | 2023-02-21 18:24:12 -0800 | |
---|---|---|
committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/mmc/host/sdhci-bcm-kona.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 'drivers/mmc/host/sdhci-bcm-kona.c')
-rw-r--r-- | drivers/mmc/host/sdhci-bcm-kona.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-bcm-kona.c b/drivers/mmc/host/sdhci-bcm-kona.c new file mode 100644 index 000000000..6a93a54fe --- /dev/null +++ b/drivers/mmc/host/sdhci-bcm-kona.c @@ -0,0 +1,328 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (C) 2013 Broadcom Corporation + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/highmem.h> +#include <linux/platform_device.h> +#include <linux/mmc/host.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/regulator/consumer.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/mmc/slot-gpio.h> + +#include "sdhci-pltfm.h" +#include "sdhci.h" + +#define SDHCI_SOFT_RESET 0x01000000 +#define KONA_SDHOST_CORECTRL 0x8000 +#define KONA_SDHOST_CD_PINCTRL 0x00000008 +#define KONA_SDHOST_STOP_HCLK 0x00000004 +#define KONA_SDHOST_RESET 0x00000002 +#define KONA_SDHOST_EN 0x00000001 + +#define KONA_SDHOST_CORESTAT 0x8004 +#define KONA_SDHOST_WP 0x00000002 +#define KONA_SDHOST_CD_SW 0x00000001 + +#define KONA_SDHOST_COREIMR 0x8008 +#define KONA_SDHOST_IP 0x00000001 + +#define KONA_SDHOST_COREISR 0x800C +#define KONA_SDHOST_COREIMSR 0x8010 +#define KONA_SDHOST_COREDBG1 0x8014 +#define KONA_SDHOST_COREGPO_MASK 0x8018 + +#define SD_DETECT_GPIO_DEBOUNCE_128MS 128 + +#define KONA_MMC_AUTOSUSPEND_DELAY (50) + +struct sdhci_bcm_kona_dev { + struct mutex write_lock; /* protect back to back writes */ +}; + + +static int sdhci_bcm_kona_sd_reset(struct sdhci_host *host) +{ + unsigned int val; + unsigned long timeout; + + /* This timeout should be sufficent for core to reset */ + timeout = jiffies + msecs_to_jiffies(100); + + /* reset the host using the top level reset */ + val = sdhci_readl(host, KONA_SDHOST_CORECTRL); + val |= KONA_SDHOST_RESET; + sdhci_writel(host, val, KONA_SDHOST_CORECTRL); + + while (!(sdhci_readl(host, KONA_SDHOST_CORECTRL) & KONA_SDHOST_RESET)) { + if (time_is_before_jiffies(timeout)) { + pr_err("Error: sd host is stuck in reset!!!\n"); + return -EFAULT; + } + } + + /* bring the host out of reset */ + val = sdhci_readl(host, KONA_SDHOST_CORECTRL); + val &= ~KONA_SDHOST_RESET; + + /* + * Back-to-Back register write needs a delay of 1ms at bootup (min 10uS) + * Back-to-Back writes to same register needs delay when SD bus clock + * is very low w.r.t AHB clock, mainly during boot-time and during card + * insert-removal. + */ + usleep_range(1000, 5000); + sdhci_writel(host, val, KONA_SDHOST_CORECTRL); + + return 0; +} + +static void sdhci_bcm_kona_sd_init(struct sdhci_host *host) +{ + unsigned int val; + + /* enable the interrupt from the IP core */ + val = sdhci_readl(host, KONA_SDHOST_COREIMR); + val |= KONA_SDHOST_IP; + sdhci_writel(host, val, KONA_SDHOST_COREIMR); + + /* Enable the AHB clock gating module to the host */ + val = sdhci_readl(host, KONA_SDHOST_CORECTRL); + val |= KONA_SDHOST_EN; + + /* + * Back-to-Back register write needs a delay of 1ms at bootup (min 10uS) + * Back-to-Back writes to same register needs delay when SD bus clock + * is very low w.r.t AHB clock, mainly during boot-time and during card + * insert-removal. + */ + usleep_range(1000, 5000); + sdhci_writel(host, val, KONA_SDHOST_CORECTRL); +} + +/* + * Software emulation of the SD card insertion/removal. Set insert=1 for insert + * and insert=0 for removal. The card detection is done by GPIO. For Broadcom + * IP to function properly the bit 0 of CORESTAT register needs to be set/reset + * to generate the CD IRQ handled in sdhci.c which schedules card_tasklet. + */ +static int sdhci_bcm_kona_sd_card_emulate(struct sdhci_host *host, int insert) +{ + struct sdhci_pltfm_host *pltfm_priv = sdhci_priv(host); + struct sdhci_bcm_kona_dev *kona_dev = sdhci_pltfm_priv(pltfm_priv); + u32 val; + + /* + * Back-to-Back register write needs a delay of min 10uS. + * Back-to-Back writes to same register needs delay when SD bus clock + * is very low w.r.t AHB clock, mainly during boot-time and during card + * insert-removal. + * We keep 20uS + */ + mutex_lock(&kona_dev->write_lock); + udelay(20); + val = sdhci_readl(host, KONA_SDHOST_CORESTAT); + + if (insert) { + int ret; + + ret = mmc_gpio_get_ro(host->mmc); + if (ret >= 0) + val = (val & ~KONA_SDHOST_WP) | + ((ret) ? KONA_SDHOST_WP : 0); + + val |= KONA_SDHOST_CD_SW; + sdhci_writel(host, val, KONA_SDHOST_CORESTAT); + } else { + val &= ~KONA_SDHOST_CD_SW; + sdhci_writel(host, val, KONA_SDHOST_CORESTAT); + } + mutex_unlock(&kona_dev->write_lock); + + return 0; +} + +/* + * SD card interrupt event callback + */ +static void sdhci_bcm_kona_card_event(struct sdhci_host *host) +{ + if (mmc_gpio_get_cd(host->mmc) > 0) { + dev_dbg(mmc_dev(host->mmc), + "card inserted\n"); + sdhci_bcm_kona_sd_card_emulate(host, 1); + } else { + dev_dbg(mmc_dev(host->mmc), + "card removed\n"); + sdhci_bcm_kona_sd_card_emulate(host, 0); + } +} + +static void sdhci_bcm_kona_init_74_clocks(struct sdhci_host *host, + u8 power_mode) +{ + /* + * JEDEC and SD spec specify supplying 74 continuous clocks to + * device after power up. With minimum bus (100KHz) that + * translates to 740us + */ + if (power_mode != MMC_POWER_OFF) + udelay(740); +} + +static const struct sdhci_ops sdhci_bcm_kona_ops = { + .set_clock = sdhci_set_clock, + .get_max_clock = sdhci_pltfm_clk_get_max_clock, + .get_timeout_clock = sdhci_pltfm_clk_get_max_clock, + .platform_send_init_74_clocks = sdhci_bcm_kona_init_74_clocks, + .set_bus_width = sdhci_set_bus_width, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, + .card_event = sdhci_bcm_kona_card_event, +}; + +static const struct sdhci_pltfm_data sdhci_pltfm_data_kona = { + .ops = &sdhci_bcm_kona_ops, + .quirks = SDHCI_QUIRK_NO_CARD_NO_RESET | + SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | SDHCI_QUIRK_32BIT_DMA_ADDR | + SDHCI_QUIRK_32BIT_DMA_SIZE | SDHCI_QUIRK_32BIT_ADMA_SIZE | + SDHCI_QUIRK_FORCE_BLK_SZ_2048 | + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, +}; + +static const struct of_device_id sdhci_bcm_kona_of_match[] = { + { .compatible = "brcm,kona-sdhci"}, + { .compatible = "bcm,kona-sdhci"}, /* deprecated name */ + {} +}; +MODULE_DEVICE_TABLE(of, sdhci_bcm_kona_of_match); + +static int sdhci_bcm_kona_probe(struct platform_device *pdev) +{ + struct sdhci_bcm_kona_dev *kona_dev = NULL; + struct sdhci_pltfm_host *pltfm_priv; + struct device *dev = &pdev->dev; + struct sdhci_host *host; + int ret; + + ret = 0; + + host = sdhci_pltfm_init(pdev, &sdhci_pltfm_data_kona, + sizeof(*kona_dev)); + if (IS_ERR(host)) + return PTR_ERR(host); + + dev_dbg(dev, "%s: inited. IOADDR=%p\n", __func__, host->ioaddr); + + pltfm_priv = sdhci_priv(host); + + kona_dev = sdhci_pltfm_priv(pltfm_priv); + mutex_init(&kona_dev->write_lock); + + ret = mmc_of_parse(host->mmc); + if (ret) + goto err_pltfm_free; + + if (!host->mmc->f_max) { + dev_err(&pdev->dev, "Missing max-freq for SDHCI cfg\n"); + ret = -ENXIO; + goto err_pltfm_free; + } + + /* Get and enable the core clock */ + pltfm_priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(pltfm_priv->clk)) { + dev_err(dev, "Failed to get core clock\n"); + ret = PTR_ERR(pltfm_priv->clk); + goto err_pltfm_free; + } + + ret = clk_set_rate(pltfm_priv->clk, host->mmc->f_max); + if (ret) { + dev_err(dev, "Failed to set rate core clock\n"); + goto err_pltfm_free; + } + + ret = clk_prepare_enable(pltfm_priv->clk); + if (ret) { + dev_err(dev, "Failed to enable core clock\n"); + goto err_pltfm_free; + } + + dev_dbg(dev, "non-removable=%c\n", + mmc_card_is_removable(host->mmc) ? 'N' : 'Y'); + dev_dbg(dev, "cd_gpio %c, wp_gpio %c\n", + (mmc_gpio_get_cd(host->mmc) != -ENOSYS) ? 'Y' : 'N', + (mmc_gpio_get_ro(host->mmc) != -ENOSYS) ? 'Y' : 'N'); + + if (!mmc_card_is_removable(host->mmc)) + host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; + + dev_dbg(dev, "is_8bit=%c\n", + (host->mmc->caps & MMC_CAP_8_BIT_DATA) ? 'Y' : 'N'); + + ret = sdhci_bcm_kona_sd_reset(host); + if (ret) + goto err_clk_disable; + + sdhci_bcm_kona_sd_init(host); + + ret = sdhci_add_host(host); + if (ret) + goto err_reset; + + /* if device is eMMC, emulate card insert right here */ + if (!mmc_card_is_removable(host->mmc)) { + ret = sdhci_bcm_kona_sd_card_emulate(host, 1); + if (ret) { + dev_err(dev, + "unable to emulate card insertion\n"); + goto err_remove_host; + } + } + /* + * Since the card detection GPIO interrupt is configured to be + * edge sensitive, check the initial GPIO value here, emulate + * only if the card is present + */ + if (mmc_gpio_get_cd(host->mmc) > 0) + sdhci_bcm_kona_sd_card_emulate(host, 1); + + dev_dbg(dev, "initialized properly\n"); + return 0; + +err_remove_host: + sdhci_remove_host(host, 0); + +err_reset: + sdhci_bcm_kona_sd_reset(host); + +err_clk_disable: + clk_disable_unprepare(pltfm_priv->clk); + +err_pltfm_free: + sdhci_pltfm_free(pdev); + + dev_err(dev, "Probing of sdhci-pltfm failed: %d\n", ret); + return ret; +} + +static struct platform_driver sdhci_bcm_kona_driver = { + .driver = { + .name = "sdhci-kona", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .pm = &sdhci_pltfm_pmops, + .of_match_table = sdhci_bcm_kona_of_match, + }, + .probe = sdhci_bcm_kona_probe, + .remove = sdhci_pltfm_unregister, +}; +module_platform_driver(sdhci_bcm_kona_driver); + +MODULE_DESCRIPTION("SDHCI driver for Broadcom Kona platform"); +MODULE_AUTHOR("Broadcom"); +MODULE_LICENSE("GPL v2"); |