libboard_zynq: complete ddr without ps7_init for redpitaya

libboard_zynq/src/ddr/mod.rs

@@ -1,12 +1,9 @@
 use libregister::{RegisterR, RegisterW, RegisterRW};
 use log::{debug, info, error};
 use crate::{print, println};
-use super::slcr::{self, DdriobVrefSel};
+use super::slcr;
 use super::clocks::{Clocks, source::{DdrPll, ClockSource}};
 
-#[cfg(feature = "target_redpitaya")]
-use super::ps7_init;
-
 mod regs;
 
 #[cfg(feature = "target_zc706")]
@@ -18,8 +15,8 @@ const DDR_FREQ: u32 = 666_666_666;
 const DDR_FREQ: u32 = 525_000_000;
 
 #[cfg(feature = "target_redpitaya")]
-/// Alliance Memory AS4C256M16D3B: 800 MHz DDR3
+/// Alliance Memory AS4C256M16D3B: 800 MHz DDR3 at 533 MHz
-const DDR_FREQ: u32 = 800_000_000;
+const DDR_FREQ: u32 = 533_333_333;
 
 /// MT41K256M16HA-125
 const DCI_FREQ: u32 = 10_000_000;
@@ -30,15 +27,6 @@ pub struct DdrRam {
 
 impl DdrRam {
     pub fn ddrram() -> Self {
-        if cfg!(feature = "target_redpitaya") {
-            // We have not yet fixed red pitaya initialization yet.  It seems
-            // that the clock configuration, iob settings and ddr settings are
-            // all problematic
-            #[cfg(feature = "target_redpitaya")]
-            ps7_init::apply();
-            let regs = regs::RegisterBlock::ddrc();
-            DdrRam { regs }
-        } else {
         let clocks = Self::clock_setup();
         Self::configure_iob();
         Self::calibrate_iob_impedance(&clocks);
@@ -47,7 +35,6 @@ impl DdrRam {
         ddr.reset_ddrc(|ddr| ddr.configure());
         ddr
     }
-    }
 
     /// Zynq-7000 AP SoC Technical Reference Manual:
     /// 10.6.1 DDR Clock Initialization
@@ -237,6 +224,7 @@ impl DdrRam {
                     .vref_int_en(false)
                     .vref_ext_en_lower(true)
                     .vref_ext_en_upper(false)
+                    .refio_en(true)
             );
         });
     }
@@ -249,6 +237,13 @@ impl DdrRam {
                 .t_rfc_min(0x9e)
                 .post_selfref_gap_x32(0x10)
         );
+        #[cfg(feature = "target_redpitaya")]
+        self.regs.dram_param0.write(
+            regs::DramParam0::zeroed()
+                .t_rc(0x1b)
+                .t_rfc_min(0xa0)
+                .post_selfref_gap_x32(0x10)
+        );
         #[cfg(feature = "target_zc706")]
         self.regs.dram_param0.write(
             regs::DramParam0::zeroed()
@@ -256,6 +251,16 @@ impl DdrRam {
                 .t_rfc_min(0x56)
                 .post_selfref_gap_x32(0x10)
         );
+        #[cfg(feature = "target_redpitaya")]
+        self.regs.dram_param1.modify(
+            |_, w| w
+                .wr2pre(0x12)
+                .powerdown_to_x32(6)
+                .t_faw(0x16)
+                .t_ras_max(0x24)
+                .t_ras_min(0x13)
+                .t_cke(4)
+        );
 
         self.regs.dram_param2.write(
             regs::DramParam2::zeroed()
@@ -267,6 +272,20 @@ impl DdrRam {
                 .rd2pre(0x4)
                 .t_rcd(0x7)
         );
+        #[cfg(feature = "target_redpitaya")]
+        self.regs.dram_param3.modify(
+            |_, w| w
+                .t_ccd(4)
+                .t_rrd(6)
+                .refresh_margin(2)
+                .t_rp(7)
+                .refresh_to_x32(8)
+                .mobile(false)
+                .dfi_dram_clk_disable(false)
+                .read_latency(7)
+                .mode_ddr1_ddr2(true)
+                .dis_pad_pd(false)
+        );
 
         self.regs.dram_emr_mr.write(
             regs::DramEmrMr::zeroed()
@@ -275,11 +294,19 @@ impl DdrRam {
         );
 
         #[cfg(feature = "target_cora_z7_10")]
-        self.regs.phy_config2.modify(
+        self.regs.phy_configs[2].modify(
             |_, w| w.data_slice_in_use(false)
         );
         #[cfg(feature = "target_cora_z7_10")]
-        self.regs.phy_config3.modify(
+        self.regs.phy_configs[3].modify(
+            |_, w| w.data_slice_in_use(false)
+        );
+        #[cfg(feature = "target_redpitaya")]
+        self.regs.phy_configs[2].modify(
+            |_, w| w.data_slice_in_use(false)
+        );
+        #[cfg(feature = "target_redpitaya")]
+        self.regs.phy_configs[3].modify(
             |_, w| w.data_slice_in_use(false)
         );
 
@@ -316,7 +343,7 @@ impl DdrRam {
         );
 
         #[cfg(feature = "target_zc706")]
-        self.regs.phy_init_ratio3.write(
+        self.regs.phy_init_ratios[3].write(
             regs::PhyInitRatio::zeroed()
                 .wrlvl_init_ratio(0x21)
                 .gatelvl_init_ratio(0xee)
@@ -328,6 +355,18 @@ impl DdrRam {
                 .phy_ctrl_slave_ratio(0x100)
                 .phy_invert_clkout(true)
         );
+        #[cfg(feature = "target_redpitaya")]
+        self.regs.reg_64.modify(
+            |_, w| w
+                .phy_bl2(false)
+                .phy_invert_clkout(true)
+                .phy_sel_logic(false)
+                .phy_ctrl_slave_ratio(0x100)
+                .phy_ctrl_slave_force(false)
+                .phy_ctrl_slave_delay(0)
+                .phy_lpddr(false)
+                .phy_cmd_latency(false)
+        );
 
         self.regs.reg_65.write(
             regs::Reg65::zeroed()
@@ -364,7 +403,7 @@ impl DdrRam {
             self.regs.dram_addr_map_col.write(0xFFF00000);
             self.regs.dram_addr_map_row.write(0x0F666666);
         }
-        #[cfg(feature = "target_cora_z7_10")]
+        #[cfg(any(feature = "target_cora_z7_10", feature = "target_redpitaya"))]
         unsafe {
             // row/column address bits
             self.regs.dram_addr_map_bank.write(0x00000666);

libboard_zynq/src/ddr/regs.rs

@@ -60,7 +60,7 @@ pub struct RegisterBlock {
     pub ctrl6: RW<u32>,
     _unused1: [RO<u32>; 8],
     pub che_refresh_timer01: RW<u32>,
-    pub che_t_zq: RW<u32>,
+    pub che_t_zq: CheTZq,
     pub che_t_zq_short_interval: RW<u32>,
     pub deep_pwrdwn: RW<u32>,
     pub reg_2c: Reg2C,
@@ -84,15 +84,9 @@ pub struct RegisterBlock {
     pub che_ecc_corr_bit_mask_63_32_offset: RW<u32>,
     _unused3: [RO<u32>; 5],
     pub phy_rcvr_enable: RW<u32>,
-    pub phy_config0: PhyConfig,
+    pub phy_configs: [PhyConfig; 4],
-    pub phy_config1: PhyConfig,
-    pub phy_config2: PhyConfig,
-    pub phy_config3: PhyConfig,
     _unused4: RO<u32>,
-    pub phy_init_ratio0: PhyInitRatio,
+    pub phy_init_ratios: [PhyInitRatio; 4],
-    pub phy_init_ratio1: PhyInitRatio,
-    pub phy_init_ratio2: PhyInitRatio,
-    pub phy_init_ratio3: PhyInitRatio,
     _unused5: RO<u32>,
     pub phy_rd_dqs_cfg0: RW<u32>,
     pub phy_rd_dqs_cfg1: RW<u32>,
@@ -138,10 +132,7 @@ pub struct RegisterBlock {
     _unused14: [RO<u32>; 5],
     pub axi_id: RW<u32>,
     pub page_mask: RW<u32>,
-    pub axi_priority_wr_port0: RW<u32>,
+    pub axi_priority_wr_ports: [RW<u32>; 4],
-    pub axi_priority_wr_port1: RW<u32>,
-    pub axi_priority_wr_port2: RW<u32>,
-    pub axi_priority_wr_port3: RW<u32>,
     pub axi_priority_rd_ports: [AxiPriorityRd; 4],
     _unused15: [RO<u32>; 27],
     pub excl_access_cfg0: RW<u32>,
@@ -222,6 +213,13 @@ register_bit!(phy_cmd_timeout_rddata_cpt, clk_stall_level, 19);
 register_bits!(phy_cmd_timeout_rddata_cpt, gatelvl_num_of_dq0, u8, 24, 27);
 register_bits!(phy_cmd_timeout_rddata_cpt, wrlvl_num_of_dq0, u8, 28, 31);
 
+register!(che_t_zq, CheTZq, RW, u32);
+register_bit!(che_t_zq, dis_auto_zq, 0);
+register_bit!(che_t_zq, ddr3, 1);
+register_bits!(che_t_zq, t_mod, u8, 2, 11);
+register_bits!(che_t_zq, t_zq_long_nop, u16, 12, 21);
+register_bits!(che_t_zq, t_zq_short_nop, u16, 22, 31);
+
 register!(reg_2c, Reg2C, RW, u32);
 register_bits!(reg_2c, wrlvl_max_x1024, u16, 0, 11);
 register_bits!(reg_2c, rdlvl_max_x1024, u16, 12, 23);