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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/clk/pistachio/clk-pll.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/clk/pistachio/clk-pll.c')
-rw-r--r-- | drivers/clk/pistachio/clk-pll.c | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/drivers/clk/pistachio/clk-pll.c b/drivers/clk/pistachio/clk-pll.c new file mode 100644 index 000000000..025b9df76 --- /dev/null +++ b/drivers/clk/pistachio/clk-pll.c @@ -0,0 +1,510 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2014 Google, Inc. + */ + +#define pr_fmt(fmt) "%s: " fmt, __func__ + +#include <linux/clk-provider.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/printk.h> +#include <linux/slab.h> + +#include "clk.h" + +#define PLL_STATUS 0x0 +#define PLL_STATUS_LOCK BIT(0) + +#define PLL_CTRL1 0x4 +#define PLL_CTRL1_REFDIV_SHIFT 0 +#define PLL_CTRL1_REFDIV_MASK 0x3f +#define PLL_CTRL1_FBDIV_SHIFT 6 +#define PLL_CTRL1_FBDIV_MASK 0xfff +#define PLL_INT_CTRL1_POSTDIV1_SHIFT 18 +#define PLL_INT_CTRL1_POSTDIV1_MASK 0x7 +#define PLL_INT_CTRL1_POSTDIV2_SHIFT 21 +#define PLL_INT_CTRL1_POSTDIV2_MASK 0x7 +#define PLL_INT_CTRL1_PD BIT(24) +#define PLL_INT_CTRL1_DSMPD BIT(25) +#define PLL_INT_CTRL1_FOUTPOSTDIVPD BIT(26) +#define PLL_INT_CTRL1_FOUTVCOPD BIT(27) + +#define PLL_CTRL2 0x8 +#define PLL_FRAC_CTRL2_FRAC_SHIFT 0 +#define PLL_FRAC_CTRL2_FRAC_MASK 0xffffff +#define PLL_FRAC_CTRL2_POSTDIV1_SHIFT 24 +#define PLL_FRAC_CTRL2_POSTDIV1_MASK 0x7 +#define PLL_FRAC_CTRL2_POSTDIV2_SHIFT 27 +#define PLL_FRAC_CTRL2_POSTDIV2_MASK 0x7 +#define PLL_INT_CTRL2_BYPASS BIT(28) + +#define PLL_CTRL3 0xc +#define PLL_FRAC_CTRL3_PD BIT(0) +#define PLL_FRAC_CTRL3_DACPD BIT(1) +#define PLL_FRAC_CTRL3_DSMPD BIT(2) +#define PLL_FRAC_CTRL3_FOUTPOSTDIVPD BIT(3) +#define PLL_FRAC_CTRL3_FOUT4PHASEPD BIT(4) +#define PLL_FRAC_CTRL3_FOUTVCOPD BIT(5) + +#define PLL_CTRL4 0x10 +#define PLL_FRAC_CTRL4_BYPASS BIT(28) + +#define MIN_PFD 9600000UL +#define MIN_VCO_LA 400000000UL +#define MAX_VCO_LA 1600000000UL +#define MIN_VCO_FRAC_INT 600000000UL +#define MAX_VCO_FRAC_INT 1600000000UL +#define MIN_VCO_FRAC_FRAC 600000000UL +#define MAX_VCO_FRAC_FRAC 2400000000UL +#define MIN_OUTPUT_LA 8000000UL +#define MAX_OUTPUT_LA 1600000000UL +#define MIN_OUTPUT_FRAC 12000000UL +#define MAX_OUTPUT_FRAC 1600000000UL + +/* Fractional PLL operating modes */ +enum pll_mode { + PLL_MODE_FRAC, + PLL_MODE_INT, +}; + +struct pistachio_clk_pll { + struct clk_hw hw; + void __iomem *base; + struct pistachio_pll_rate_table *rates; + unsigned int nr_rates; +}; + +static inline u32 pll_readl(struct pistachio_clk_pll *pll, u32 reg) +{ + return readl(pll->base + reg); +} + +static inline void pll_writel(struct pistachio_clk_pll *pll, u32 val, u32 reg) +{ + writel(val, pll->base + reg); +} + +static inline void pll_lock(struct pistachio_clk_pll *pll) +{ + while (!(pll_readl(pll, PLL_STATUS) & PLL_STATUS_LOCK)) + cpu_relax(); +} + +static inline u64 do_div_round_closest(u64 dividend, u64 divisor) +{ + dividend += divisor / 2; + return div64_u64(dividend, divisor); +} + +static inline struct pistachio_clk_pll *to_pistachio_pll(struct clk_hw *hw) +{ + return container_of(hw, struct pistachio_clk_pll, hw); +} + +static inline enum pll_mode pll_frac_get_mode(struct clk_hw *hw) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u32 val; + + val = pll_readl(pll, PLL_CTRL3) & PLL_FRAC_CTRL3_DSMPD; + return val ? PLL_MODE_INT : PLL_MODE_FRAC; +} + +static inline void pll_frac_set_mode(struct clk_hw *hw, enum pll_mode mode) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u32 val; + + val = pll_readl(pll, PLL_CTRL3); + if (mode == PLL_MODE_INT) + val |= PLL_FRAC_CTRL3_DSMPD | PLL_FRAC_CTRL3_DACPD; + else + val &= ~(PLL_FRAC_CTRL3_DSMPD | PLL_FRAC_CTRL3_DACPD); + + pll_writel(pll, val, PLL_CTRL3); +} + +static struct pistachio_pll_rate_table * +pll_get_params(struct pistachio_clk_pll *pll, unsigned long fref, + unsigned long fout) +{ + unsigned int i; + + for (i = 0; i < pll->nr_rates; i++) { + if (pll->rates[i].fref == fref && pll->rates[i].fout == fout) + return &pll->rates[i]; + } + + return NULL; +} + +static long pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + unsigned int i; + + for (i = 0; i < pll->nr_rates; i++) { + if (i > 0 && pll->rates[i].fref == *parent_rate && + pll->rates[i].fout <= rate) + return pll->rates[i - 1].fout; + } + + return pll->rates[0].fout; +} + +static int pll_gf40lp_frac_enable(struct clk_hw *hw) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u32 val; + + val = pll_readl(pll, PLL_CTRL3); + val &= ~(PLL_FRAC_CTRL3_PD | PLL_FRAC_CTRL3_FOUTPOSTDIVPD | + PLL_FRAC_CTRL3_FOUT4PHASEPD | PLL_FRAC_CTRL3_FOUTVCOPD); + pll_writel(pll, val, PLL_CTRL3); + + val = pll_readl(pll, PLL_CTRL4); + val &= ~PLL_FRAC_CTRL4_BYPASS; + pll_writel(pll, val, PLL_CTRL4); + + pll_lock(pll); + + return 0; +} + +static void pll_gf40lp_frac_disable(struct clk_hw *hw) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u32 val; + + val = pll_readl(pll, PLL_CTRL3); + val |= PLL_FRAC_CTRL3_PD; + pll_writel(pll, val, PLL_CTRL3); +} + +static int pll_gf40lp_frac_is_enabled(struct clk_hw *hw) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + + return !(pll_readl(pll, PLL_CTRL3) & PLL_FRAC_CTRL3_PD); +} + +static int pll_gf40lp_frac_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + struct pistachio_pll_rate_table *params; + int enabled = pll_gf40lp_frac_is_enabled(hw); + u64 val, vco, old_postdiv1, old_postdiv2; + const char *name = clk_hw_get_name(hw); + + if (rate < MIN_OUTPUT_FRAC || rate > MAX_OUTPUT_FRAC) + return -EINVAL; + + params = pll_get_params(pll, parent_rate, rate); + if (!params || !params->refdiv) + return -EINVAL; + + /* calculate vco */ + vco = params->fref; + vco *= (params->fbdiv << 24) + params->frac; + vco = div64_u64(vco, params->refdiv << 24); + + if (vco < MIN_VCO_FRAC_FRAC || vco > MAX_VCO_FRAC_FRAC) + pr_warn("%s: VCO %llu is out of range %lu..%lu\n", name, vco, + MIN_VCO_FRAC_FRAC, MAX_VCO_FRAC_FRAC); + + val = div64_u64(params->fref, params->refdiv); + if (val < MIN_PFD) + pr_warn("%s: PFD %llu is too low (min %lu)\n", + name, val, MIN_PFD); + if (val > vco / 16) + pr_warn("%s: PFD %llu is too high (max %llu)\n", + name, val, vco / 16); + + val = pll_readl(pll, PLL_CTRL1); + val &= ~((PLL_CTRL1_REFDIV_MASK << PLL_CTRL1_REFDIV_SHIFT) | + (PLL_CTRL1_FBDIV_MASK << PLL_CTRL1_FBDIV_SHIFT)); + val |= (params->refdiv << PLL_CTRL1_REFDIV_SHIFT) | + (params->fbdiv << PLL_CTRL1_FBDIV_SHIFT); + pll_writel(pll, val, PLL_CTRL1); + + val = pll_readl(pll, PLL_CTRL2); + + old_postdiv1 = (val >> PLL_FRAC_CTRL2_POSTDIV1_SHIFT) & + PLL_FRAC_CTRL2_POSTDIV1_MASK; + old_postdiv2 = (val >> PLL_FRAC_CTRL2_POSTDIV2_SHIFT) & + PLL_FRAC_CTRL2_POSTDIV2_MASK; + if (enabled && + (params->postdiv1 != old_postdiv1 || + params->postdiv2 != old_postdiv2)) + pr_warn("%s: changing postdiv while PLL is enabled\n", name); + + if (params->postdiv2 > params->postdiv1) + pr_warn("%s: postdiv2 should not exceed postdiv1\n", name); + + val &= ~((PLL_FRAC_CTRL2_FRAC_MASK << PLL_FRAC_CTRL2_FRAC_SHIFT) | + (PLL_FRAC_CTRL2_POSTDIV1_MASK << + PLL_FRAC_CTRL2_POSTDIV1_SHIFT) | + (PLL_FRAC_CTRL2_POSTDIV2_MASK << + PLL_FRAC_CTRL2_POSTDIV2_SHIFT)); + val |= (params->frac << PLL_FRAC_CTRL2_FRAC_SHIFT) | + (params->postdiv1 << PLL_FRAC_CTRL2_POSTDIV1_SHIFT) | + (params->postdiv2 << PLL_FRAC_CTRL2_POSTDIV2_SHIFT); + pll_writel(pll, val, PLL_CTRL2); + + /* set operating mode */ + if (params->frac) + pll_frac_set_mode(hw, PLL_MODE_FRAC); + else + pll_frac_set_mode(hw, PLL_MODE_INT); + + if (enabled) + pll_lock(pll); + + return 0; +} + +static unsigned long pll_gf40lp_frac_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u64 val, prediv, fbdiv, frac, postdiv1, postdiv2, rate; + + val = pll_readl(pll, PLL_CTRL1); + prediv = (val >> PLL_CTRL1_REFDIV_SHIFT) & PLL_CTRL1_REFDIV_MASK; + fbdiv = (val >> PLL_CTRL1_FBDIV_SHIFT) & PLL_CTRL1_FBDIV_MASK; + + val = pll_readl(pll, PLL_CTRL2); + postdiv1 = (val >> PLL_FRAC_CTRL2_POSTDIV1_SHIFT) & + PLL_FRAC_CTRL2_POSTDIV1_MASK; + postdiv2 = (val >> PLL_FRAC_CTRL2_POSTDIV2_SHIFT) & + PLL_FRAC_CTRL2_POSTDIV2_MASK; + frac = (val >> PLL_FRAC_CTRL2_FRAC_SHIFT) & PLL_FRAC_CTRL2_FRAC_MASK; + + /* get operating mode (int/frac) and calculate rate accordingly */ + rate = parent_rate; + if (pll_frac_get_mode(hw) == PLL_MODE_FRAC) + rate *= (fbdiv << 24) + frac; + else + rate *= (fbdiv << 24); + + rate = do_div_round_closest(rate, (prediv * postdiv1 * postdiv2) << 24); + + return rate; +} + +static const struct clk_ops pll_gf40lp_frac_ops = { + .enable = pll_gf40lp_frac_enable, + .disable = pll_gf40lp_frac_disable, + .is_enabled = pll_gf40lp_frac_is_enabled, + .recalc_rate = pll_gf40lp_frac_recalc_rate, + .round_rate = pll_round_rate, + .set_rate = pll_gf40lp_frac_set_rate, +}; + +static const struct clk_ops pll_gf40lp_frac_fixed_ops = { + .enable = pll_gf40lp_frac_enable, + .disable = pll_gf40lp_frac_disable, + .is_enabled = pll_gf40lp_frac_is_enabled, + .recalc_rate = pll_gf40lp_frac_recalc_rate, +}; + +static int pll_gf40lp_laint_enable(struct clk_hw *hw) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u32 val; + + val = pll_readl(pll, PLL_CTRL1); + val &= ~(PLL_INT_CTRL1_PD | + PLL_INT_CTRL1_FOUTPOSTDIVPD | PLL_INT_CTRL1_FOUTVCOPD); + pll_writel(pll, val, PLL_CTRL1); + + val = pll_readl(pll, PLL_CTRL2); + val &= ~PLL_INT_CTRL2_BYPASS; + pll_writel(pll, val, PLL_CTRL2); + + pll_lock(pll); + + return 0; +} + +static void pll_gf40lp_laint_disable(struct clk_hw *hw) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u32 val; + + val = pll_readl(pll, PLL_CTRL1); + val |= PLL_INT_CTRL1_PD; + pll_writel(pll, val, PLL_CTRL1); +} + +static int pll_gf40lp_laint_is_enabled(struct clk_hw *hw) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + + return !(pll_readl(pll, PLL_CTRL1) & PLL_INT_CTRL1_PD); +} + +static int pll_gf40lp_laint_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + struct pistachio_pll_rate_table *params; + int enabled = pll_gf40lp_laint_is_enabled(hw); + u32 val, vco, old_postdiv1, old_postdiv2; + const char *name = clk_hw_get_name(hw); + + if (rate < MIN_OUTPUT_LA || rate > MAX_OUTPUT_LA) + return -EINVAL; + + params = pll_get_params(pll, parent_rate, rate); + if (!params || !params->refdiv) + return -EINVAL; + + vco = div_u64(params->fref * params->fbdiv, params->refdiv); + if (vco < MIN_VCO_LA || vco > MAX_VCO_LA) + pr_warn("%s: VCO %u is out of range %lu..%lu\n", name, vco, + MIN_VCO_LA, MAX_VCO_LA); + + val = div_u64(params->fref, params->refdiv); + if (val < MIN_PFD) + pr_warn("%s: PFD %u is too low (min %lu)\n", + name, val, MIN_PFD); + if (val > vco / 16) + pr_warn("%s: PFD %u is too high (max %u)\n", + name, val, vco / 16); + + val = pll_readl(pll, PLL_CTRL1); + + old_postdiv1 = (val >> PLL_INT_CTRL1_POSTDIV1_SHIFT) & + PLL_INT_CTRL1_POSTDIV1_MASK; + old_postdiv2 = (val >> PLL_INT_CTRL1_POSTDIV2_SHIFT) & + PLL_INT_CTRL1_POSTDIV2_MASK; + if (enabled && + (params->postdiv1 != old_postdiv1 || + params->postdiv2 != old_postdiv2)) + pr_warn("%s: changing postdiv while PLL is enabled\n", name); + + if (params->postdiv2 > params->postdiv1) + pr_warn("%s: postdiv2 should not exceed postdiv1\n", name); + + val &= ~((PLL_CTRL1_REFDIV_MASK << PLL_CTRL1_REFDIV_SHIFT) | + (PLL_CTRL1_FBDIV_MASK << PLL_CTRL1_FBDIV_SHIFT) | + (PLL_INT_CTRL1_POSTDIV1_MASK << PLL_INT_CTRL1_POSTDIV1_SHIFT) | + (PLL_INT_CTRL1_POSTDIV2_MASK << PLL_INT_CTRL1_POSTDIV2_SHIFT)); + val |= (params->refdiv << PLL_CTRL1_REFDIV_SHIFT) | + (params->fbdiv << PLL_CTRL1_FBDIV_SHIFT) | + (params->postdiv1 << PLL_INT_CTRL1_POSTDIV1_SHIFT) | + (params->postdiv2 << PLL_INT_CTRL1_POSTDIV2_SHIFT); + pll_writel(pll, val, PLL_CTRL1); + + if (enabled) + pll_lock(pll); + + return 0; +} + +static unsigned long pll_gf40lp_laint_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct pistachio_clk_pll *pll = to_pistachio_pll(hw); + u32 val, prediv, fbdiv, postdiv1, postdiv2; + u64 rate = parent_rate; + + val = pll_readl(pll, PLL_CTRL1); + prediv = (val >> PLL_CTRL1_REFDIV_SHIFT) & PLL_CTRL1_REFDIV_MASK; + fbdiv = (val >> PLL_CTRL1_FBDIV_SHIFT) & PLL_CTRL1_FBDIV_MASK; + postdiv1 = (val >> PLL_INT_CTRL1_POSTDIV1_SHIFT) & + PLL_INT_CTRL1_POSTDIV1_MASK; + postdiv2 = (val >> PLL_INT_CTRL1_POSTDIV2_SHIFT) & + PLL_INT_CTRL1_POSTDIV2_MASK; + + rate *= fbdiv; + rate = do_div_round_closest(rate, prediv * postdiv1 * postdiv2); + + return rate; +} + +static const struct clk_ops pll_gf40lp_laint_ops = { + .enable = pll_gf40lp_laint_enable, + .disable = pll_gf40lp_laint_disable, + .is_enabled = pll_gf40lp_laint_is_enabled, + .recalc_rate = pll_gf40lp_laint_recalc_rate, + .round_rate = pll_round_rate, + .set_rate = pll_gf40lp_laint_set_rate, +}; + +static const struct clk_ops pll_gf40lp_laint_fixed_ops = { + .enable = pll_gf40lp_laint_enable, + .disable = pll_gf40lp_laint_disable, + .is_enabled = pll_gf40lp_laint_is_enabled, + .recalc_rate = pll_gf40lp_laint_recalc_rate, +}; + +static struct clk *pll_register(const char *name, const char *parent_name, + unsigned long flags, void __iomem *base, + enum pistachio_pll_type type, + struct pistachio_pll_rate_table *rates, + unsigned int nr_rates) +{ + struct pistachio_clk_pll *pll; + struct clk_init_data init; + struct clk *clk; + + pll = kzalloc(sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.flags = flags | CLK_GET_RATE_NOCACHE; + init.parent_names = &parent_name; + init.num_parents = 1; + + switch (type) { + case PLL_GF40LP_FRAC: + if (rates) + init.ops = &pll_gf40lp_frac_ops; + else + init.ops = &pll_gf40lp_frac_fixed_ops; + break; + case PLL_GF40LP_LAINT: + if (rates) + init.ops = &pll_gf40lp_laint_ops; + else + init.ops = &pll_gf40lp_laint_fixed_ops; + break; + default: + pr_err("Unrecognized PLL type %u\n", type); + kfree(pll); + return ERR_PTR(-EINVAL); + } + + pll->hw.init = &init; + pll->base = base; + pll->rates = rates; + pll->nr_rates = nr_rates; + + clk = clk_register(NULL, &pll->hw); + if (IS_ERR(clk)) + kfree(pll); + + return clk; +} + +void pistachio_clk_register_pll(struct pistachio_clk_provider *p, + struct pistachio_pll *pll, + unsigned int num) +{ + struct clk *clk; + unsigned int i; + + for (i = 0; i < num; i++) { + clk = pll_register(pll[i].name, pll[i].parent, + 0, p->base + pll[i].reg_base, + pll[i].type, pll[i].rates, + pll[i].nr_rates); + p->clk_data.clks[pll[i].id] = clk; + } +} |