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authorIan McIntyre <me@mciantyre.dev>2025-11-30 18:52:34 -0500
committerIan McIntyre <me@mciantyre.dev>2025-11-30 19:10:51 -0500
commit76199f21616ad86cf68f3b063c1ce23c6fc5a52f (patch)
tree4c076d0afd649803a2bd9a5ed5cbb1f1c74fb459 /drivers/ccm-11xx/src/lib.rs
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diff --git a/drivers/ccm-11xx/src/lib.rs b/drivers/ccm-11xx/src/lib.rs
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+#![no_std]
+
+mod ral_common {
+ pub mod gpr_shared {
+ #[repr(C)]
+ #[allow(non_snake_case)]
+ pub struct RegisterBlock {
+ pub REG: u32,
+ pub SET: u32,
+ pub CLR: u32,
+ pub TOG: u32,
+ pub AUTHEN: u32,
+ pub AUTHEN_SET: u32,
+ pub AUTHEN_CLR: u32,
+ pub AUTHEN_TOG: u32,
+ }
+ }
+ pub mod gpr_private {
+ pub use super::gpr_shared::RegisterBlock;
+ }
+}
+
+pub mod ral_11xx {
+ pub mod clock_group;
+ pub mod clock_root;
+ pub mod lpcg;
+ pub mod osc_pll;
+ pub mod pll;
+ use core::num::{NonZeroU8, NonZeroU32};
+
+ pub use crate::ral_common::{gpr_private, gpr_shared};
+
+ pub use self::{
+ clock_group as CLOCK_GROUP, clock_root as CLOCK_ROOT, gpr_private as GPR_PRIVATE,
+ gpr_shared as GPR_SHARED, lpcg as LPCG, osc_pll as OSC_PLL,
+ };
+
+ #[repr(C)]
+ #[allow(non_snake_case)]
+ pub struct RegisterBlock {
+ pub CLOCK_ROOT: [clock_root::RegisterBlock; 79],
+ _reserved0: [u8; 6272],
+ pub CLOCK_GROUP: [clock_group::RegisterBlock; 2],
+ _reserved1: [u8; 1792],
+ pub GPR_SHARED: [gpr_shared::RegisterBlock; 8],
+ _reserved2: [u8; 800 - size_of::<gpr_private::RegisterBlock>()],
+ /// First register block is typically reserved. To avoid this
+ /// reserved block, make sure your index corresponds to the
+ /// register names.
+ pub GPR_PRIVATE: [gpr_private::RegisterBlock; 8],
+ _reserved3: [u8; 768],
+ pub OSC_PLL: [osc_pll::RegisterBlock; 29],
+ _reserved4: [u8; 3168],
+ pub LPCG: [lpcg::RegisterBlock; 138],
+ }
+
+ pub type Instance = ral_registers::Instance<RegisterBlock>;
+
+ /// A clock source.
+ ///
+ /// These typically map to an `OSCPLL`.
+ #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+ #[repr(u32)]
+ #[non_exhaustive]
+ pub enum ClockSource {
+ /// The 16MHz RC oscillator.
+ Rc16M = 0,
+ /// The 48MHz RC oscillator.
+ Rc48M = 1,
+ /// The 48MHz RC oscillator with a fixed divide-by-2.
+ Rc48MDiv2 = 2,
+ /// The 400MHz RC oscillator.
+ Rc400M = 3,
+ /// The external 24MHz crystal oscillator VCO.
+ ///
+ /// This output isn't exposed by the clock tree.
+ /// However, it's exposed via [`XtalClk`].
+ Xtal = 4,
+ /// The exposed 24MHz crystal oscillator.
+ XtalClk = 5,
+ /// ARM PLL VCO output.
+ ///
+ /// Not connected to the clock tree.
+ ArmPll = 6,
+ /// The ARM PLL output in the clock tree.
+ ArmPllClk = 7,
+
+ /// Ths voltage controlled oscillator for PLL2.
+ ///
+ /// This output isn't exposed by the clock tree.
+ /// However, the [`Pll2Clk`] is exposed.
+ Pll2 = 8,
+ /// The PLL2 output into the clock tree.
+ Pll2Clk = 9,
+ /// PFD0 of PLL2.
+ Pll2Pfd0 = 10,
+ /// PFD1 of PLL2.
+ Pll2Pfd1 = 11,
+ /// PFD2 of PLL2.
+ Pll2Pfd2 = 12,
+ /// PFD3 of PLL2.
+ Pll2Pfd3 = 13,
+
+ /// Ths voltage controlled oscillator for PLL3.
+ ///
+ /// This output isn't exposed by the clock tree.
+ /// However, the [`Pll3Clk`] is exposed.
+ Pll3 = 14,
+ /// The PLL3 output into the clock tree.
+ Pll3Clk = 15,
+ /// PLL3 with a fixed divide-by-2.
+ Pll3Div2 = 16,
+ /// PFD0 of PLL3.
+ Pll3Pfd0 = 17,
+ /// PFD1 of PLL3.
+ Pll3Pfd1 = 18,
+ /// PFD2 of PLL3.
+ Pll3Pfd2 = 19,
+ /// PFD3 of PLL3.
+ Pll3Pfd3 = 20,
+
+ /// The voltage controlled oscillator for PLL1.
+ ///
+ /// This output isn't exposed by the clock tree.
+ /// However, the [`Pll1Clk`] is exposed.
+ Pll1 = 21,
+ /// The PLL1 output into the clock tree.
+ Pll1Clk = 22,
+ /// PLL1 with a fixed divide-by-2.
+ Pll1Div2 = 23,
+ /// PLL1 with a fixed divide-by-5.
+ Pll1Div5 = 24,
+ }
+
+ /// A clock root.
+ #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+ #[repr(u32)]
+ #[non_exhaustive]
+ pub enum ClockRoot {
+ /// Cortex-M7.
+ M7 = 0,
+ /// `BUS_CLK`.
+ Bus = 2,
+ /// `BUS_LPSR_CLK`.
+ BusLpsr = 3,
+ /// SYSTICK for the Cortex-M7.
+ M7Systick = 8,
+ /// FlexSPI1.
+ Flexspi1 = 20,
+ /// FlexSPI2.
+ Flexspi2 = 21,
+ /// LPSPI1.
+ Lpspi1 = 43,
+ /// ENET.
+ Enet = 51,
+ /// ENET_1G.
+ Enet1G = 52,
+ /// ENET QOS on supported MCUs.
+ EnetQos = 53,
+ /// ENET_25M clock.
+ Enet25M = 54,
+ /// ENET PPT.
+ EnetTimer1 = 55,
+ /// ENET_1G PPT.
+ EnetTimer2 = 56,
+ /// ENET QOS PPT on supported MCUs.
+ EnetTimer3 = 57,
+ }
+
+ /// A clock mux value.
+ ///
+ /// Use [`get`](Self::get) to acquire the raw value that
+ /// can be committed to the hardware.
+ #[derive(Clone, Copy, PartialEq, Eq)]
+ #[repr(transparent)]
+ pub struct ClockMux(NonZeroU32);
+
+ impl ClockMux {
+ const fn new(raw: u32) -> Option<Self> {
+ match NonZeroU32::new(raw.saturating_add(1)) {
+ Some(mux) => Some(ClockMux(mux)),
+ None => None,
+ }
+ }
+
+ /// Returns the raw mux value that's valid for
+ /// the hardware.
+ pub const fn get(self) -> u32 {
+ self.0.get() - 1
+ }
+ }
+
+ /// Produces the MUX selection for this clock root, as long
+ /// as the source can be multiplexed to this root.
+ ///
+ /// Returns `None` if the source isn't available for this
+ /// root. It may also return `None` if the mapping isn't implemented.
+ ///
+ /// The implementation may alias names for convenience.
+ /// For example, `Xtal` and `XtalClk` alias to the same mux
+ /// value, although `Xtal` isn't connected to the clock tree.
+ ///
+ /// The implementation may return roots that are marked "reserved"
+ /// on your chip. For example, some M7 clock sources are reserved on
+ /// the 1160 but implemented on the 1170. This call will return those
+ /// reserved muxes for the 1170, and it's the user's job to know that
+ /// the root is invalid on the 1160.
+ pub const fn try_mux(root: ClockRoot, source: ClockSource) -> Option<ClockMux> {
+ // These sources are always available no matter the
+ // user's selected root.
+ match source {
+ ClockSource::Rc48MDiv2 => return ClockMux::new(0b000),
+ ClockSource::Xtal | ClockSource::XtalClk => return ClockMux::new(0b001),
+ ClockSource::Rc400M => return ClockMux::new(0b010),
+ ClockSource::Rc16M => return ClockMux::new(0b011),
+ _ => {}
+ }
+
+ // The remaining sources are specific to the root.
+ match root {
+ ClockRoot::Enet
+ | ClockRoot::Enet1G
+ | ClockRoot::EnetQos
+ | ClockRoot::Enet25M
+ | ClockRoot::EnetTimer1
+ | ClockRoot::EnetTimer2
+ | ClockRoot::EnetTimer3 => match source {
+ ClockSource::Pll1Div2 => ClockMux::new(0b100),
+ ClockSource::Pll1Div5 => ClockMux::new(0b110),
+ _ => None,
+ },
+ ClockRoot::M7 => match source {
+ ClockSource::ArmPll | ClockSource::ArmPllClk => ClockMux::new(0b100),
+ _ => None,
+ },
+ ClockRoot::Bus => match source {
+ ClockSource::Pll1Div5 => ClockMux::new(0b101),
+ _ => None,
+ },
+ ClockRoot::BusLpsr => match source {
+ ClockSource::Pll3Pfd3 => ClockMux::new(0b100),
+ ClockSource::Pll3 | ClockSource::Pll3Clk => ClockMux::new(0b101),
+ ClockSource::Pll2 | ClockSource::Pll2Clk => ClockMux::new(0b110),
+ ClockSource::Pll1Div5 => ClockMux::new(0b111),
+ _ => None,
+ },
+ ClockRoot::M7Systick => match source {
+ ClockSource::Pll1Div5 => ClockMux::new(0b110),
+ _ => None,
+ },
+ ClockRoot::Lpspi1 => match source {
+ _ => None,
+ },
+ ClockRoot::Flexspi1 | ClockRoot::Flexspi2 => match source {
+ ClockSource::Pll3Pfd0 => ClockMux::new(0b100),
+ ClockSource::Pll2 | ClockSource::Pll2Clk => ClockMux::new(0b101),
+ ClockSource::Pll2Pfd2 => ClockMux::new(0b110),
+ ClockSource::Pll3 | ClockSource::Pll3Clk => ClockMux::new(0b111),
+ _ => None,
+ },
+ }
+ }
+
+ /// Returns the MUX selection for the given clock root for the
+ /// source.
+ ///
+ /// See [`try_mux`] for more information.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the clock root cannot be muxed to the given source.
+ pub const fn mux(root: ClockRoot, source: ClockSource) -> ClockMux {
+ let Some(mux) = try_mux(root, source) else {
+ panic!("Root clock cannot be driven by the source");
+ };
+ mux
+ }
+
+ /// Returns `true` if this clock source supports setpoints.
+ ///
+ /// If the source supports setpoints, it can be controlled by
+ /// the GPC.
+ pub fn source_has_setpoint(ccm: Instance, clock_source: ClockSource) -> bool {
+ ral_registers::read_reg!(
+ self,
+ ccm,
+ OSC_PLL[clock_source as usize].CONFIG,
+ SETPOINT_PRESENT == 1
+ )
+ }
+
+ /// Returns `true` if this clock root supports setpoints.
+ ///
+ /// If the root supports setpoints, it can be controlled by
+ /// the GPC.
+ pub fn root_has_setpoint(ccm: Instance, clock_root: ClockRoot) -> bool {
+ ral_registers::read_reg!(
+ self,
+ ccm,
+ CLOCK_ROOT[clock_root as usize].CONFIG,
+ SETPOINT_PRESENT == 1
+ )
+ }
+
+ /// The clock source is invalid for the given operation.
+ #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+ #[repr(transparent)]
+ pub struct InvalidSourceError(pub ClockSource);
+
+ /// The clock root is invalid for the given operation.
+ #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+ #[repr(transparent)]
+ pub struct InvalidRootError(pub ClockRoot);
+
+ /// Enable setpoint mode for this clock source.
+ ///
+ /// This implicitly disables CPULP and domain modes; the source
+ /// cannot operate in different modes. It also disables the source
+ /// clock in the `DIRECT` register.
+ pub fn enable_source_setpoints(
+ ccm: Instance,
+ clock_source: ClockSource,
+ ) -> Result<(), InvalidSourceError> {
+ if !source_has_setpoint(ccm, clock_source) {
+ return Err(InvalidSourceError(clock_source));
+ }
+
+ set_source_direct(ccm, clock_source, false);
+ ral_registers::modify_reg!(self, ccm, OSC_PLL[clock_source as usize].AUTHEN,
+ CPULPM: 0,
+ SETPOINT_MODE: 1,
+ DOMAIN_MODE: 0,
+ );
+
+ Ok(())
+ }
+
+ /// Enables setpoint mode for this clock root.
+ ///
+ /// This implicitly disables domain mode; the root
+ /// cannot operate in different modes.
+ pub fn enable_root_setpoints(
+ ccm: Instance,
+ clock_root: ClockRoot,
+ ) -> Result<(), InvalidRootError> {
+ if !root_has_setpoint(ccm, clock_root) {
+ return Err(InvalidRootError(clock_root));
+ }
+
+ ral_registers::modify_reg!(self, ccm, CLOCK_ROOT[clock_root as usize].AUTHEN,
+ SETPOINT_MODE: 1,
+ DOMAIN_MODE: 0,
+ );
+
+ Ok(())
+ }
+
+ /// Specify which setpoints enable this clock source.
+ ///
+ /// `setpoints` describes the bitmask of enabled setpoints.
+ /// `standby` describes if the source remains enabled during a standby
+ /// transition in that setpoint.
+ pub fn set_source_setpoints(
+ ccm: Instance,
+ clock_source: ClockSource,
+ setpoints: u16,
+ standby: u16,
+ ) {
+ ral_registers::write_reg!(self, ccm, OSC_PLL[clock_source as usize].SETPOINT, SETPOINT: setpoints as u32, STANDBY: standby as u32);
+ }
+
+ /// Set the clock root's selection and divider.
+ ///
+ /// Spins while the change is in progress.
+ pub fn set_clock_root(ccm: Instance, clock_root: ClockRoot, mux: ClockMux, div: NonZeroU8) {
+ ral_registers::modify_reg!(self, ccm, CLOCK_ROOT[clock_root as usize].CONTROL, MUX: mux.get(), DIV: (div.get() as u32) - 1);
+ while ral_registers::read_reg!(
+ self,
+ ccm,
+ CLOCK_ROOT[clock_root as usize].STATUS0,
+ CHANGING == 1
+ ) {}
+ }
+
+ /// Directly set the clock source on or off.
+ pub fn set_source_direct(ccm: Instance, clock_source: ClockSource, on: bool) {
+ ral_registers::write_reg!(self, ccm, OSC_PLL[clock_source as usize].DIRECT, on as u32);
+ }
+}
+
+pub mod ral_1180 {
+ pub use crate::ral_common::{gpr_private, gpr_shared};
+ pub mod clock_root;
+ pub mod lpcg;
+ pub mod observe;
+ pub mod osc_pll;
+
+ pub use self::{
+ clock_root as CLOCK_ROOT, gpr_private as GPR_PRIVATE, gpr_shared as GPR_SHARED,
+ lpcg as LPCG, observe as OBSERVE, osc_pll as OSC_PLL,
+ };
+
+ #[repr(C)]
+ #[allow(non_snake_case)]
+ pub struct RegisterBlock {
+ pub CLOCK_ROOT: [clock_root::RegisterBlock; 74],
+ _reserved0: [u8; 7936],
+ pub OBSERVE: [observe::RegisterBlock; 2],
+ _reserved1: [u8; 768],
+ pub GPR_SHARED: [gpr_shared::RegisterBlock; 16],
+ pub GPR_SHARED_STATUS: [u32; 8],
+ _reserved2: [u8; 480],
+ pub GPR_PRIVATE: [gpr_private::RegisterBlock; 4],
+ _reserved3: [u8; 896],
+ pub OSC_PLL: [osc_pll::RegisterBlock; 25],
+ _reserved4: [u8; 10688],
+ pub LPCG: [lpcg::RegisterBlock; 149],
+ }
+}
+
+ral_registers::register! {
+ #[doc = "Clock root working status"]
+ STATUS0_RO<u32> RO [
+ #[doc = "Current clock root POWERDOWN setting"]
+ POWERDOWN start(27) width(1) RO {}
+ #[doc = "Internal updating in generation logic"]
+ SLICE_BUSY start(28) width(1) RO {}
+ #[doc = "Internal status synchronization to clock generation logic"]
+ UPDATE_FORWARD start(29) width(1) RO {}
+ #[doc = "Internal status synchronization from clock generation logic"]
+ UPDATE_REVERSE start(30) width(1) RO {}
+ #[doc = "Internal updating in clock root"]
+ CHANGING start(31) width(1) RO {}
+ ]
+}
+
+#[cfg(test)]
+mod tests {
+ use core::mem::offset_of;
+
+ #[test]
+ fn layout_1180() {
+ use super::ral_1180::RegisterBlock;
+
+ assert_eq!(offset_of!(RegisterBlock, CLOCK_ROOT), 0);
+ assert_eq!(offset_of!(RegisterBlock, OBSERVE), 0x4400);
+ assert_eq!(offset_of!(RegisterBlock, GPR_SHARED), 0x4800);
+ assert_eq!(offset_of!(RegisterBlock, GPR_SHARED_STATUS), 0x4a00);
+ assert_eq!(offset_of!(RegisterBlock, GPR_PRIVATE), 0x4C00);
+ assert_eq!(offset_of!(RegisterBlock, OSC_PLL), 0x5000,);
+ assert_eq!(offset_of!(RegisterBlock, LPCG), 0x8000);
+ }
+
+ #[test]
+ fn layout_11xx() {
+ use super::ral_11xx::RegisterBlock;
+
+ assert_eq!(offset_of!(RegisterBlock, CLOCK_ROOT), 0);
+ assert_eq!(offset_of!(RegisterBlock, CLOCK_GROUP), 0x4000);
+ assert_eq!(offset_of!(RegisterBlock, GPR_SHARED), 0x4800);
+ assert_eq!(offset_of!(RegisterBlock, GPR_PRIVATE), 0x4c00);
+ assert_eq!(offset_of!(RegisterBlock, OSC_PLL), 0x5000);
+ assert_eq!(offset_of!(RegisterBlock, LPCG), 0x6000);
+ }
+}