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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2018 Xilinx, Inc. (Michal Simek)
- */
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <timer.h>
- #include <asm/io.h>
- #define CNT_CNTRL_RESET BIT(4)
- struct cadence_ttc_regs {
- u32 clk_cntrl1; /* 0x0 - Clock Control 1 */
- u32 clk_cntrl2; /* 0x4 - Clock Control 2 */
- u32 clk_cntrl3; /* 0x8 - Clock Control 3 */
- u32 counter_cntrl1; /* 0xC - Counter Control 1 */
- u32 counter_cntrl2; /* 0x10 - Counter Control 2 */
- u32 counter_cntrl3; /* 0x14 - Counter Control 3 */
- u32 counter_val1; /* 0x18 - Counter Control 1 */
- u32 counter_val2; /* 0x1C - Counter Control 2 */
- u32 counter_val3; /* 0x20 - Counter Control 3 */
- u32 reserved[15];
- u32 interrupt_enable1; /* 0x60 - Interrupt Enable 1 */
- u32 interrupt_enable2; /* 0x64 - Interrupt Enable 2 */
- u32 interrupt_enable3; /* 0x68 - Interrupt Enable 3 */
- };
- struct cadence_ttc_priv {
- struct cadence_ttc_regs *regs;
- };
- static int cadence_ttc_get_count(struct udevice *dev, u64 *count)
- {
- struct cadence_ttc_priv *priv = dev_get_priv(dev);
- *count = readl(&priv->regs->counter_val1);
- return 0;
- }
- static int cadence_ttc_probe(struct udevice *dev)
- {
- struct cadence_ttc_priv *priv = dev_get_priv(dev);
- /* Disable interrupts for sure */
- writel(0, &priv->regs->interrupt_enable1);
- writel(0, &priv->regs->interrupt_enable2);
- writel(0, &priv->regs->interrupt_enable3);
- /* Make sure that clocks are configured properly without prescaller */
- writel(0, &priv->regs->clk_cntrl1);
- writel(0, &priv->regs->clk_cntrl2);
- writel(0, &priv->regs->clk_cntrl3);
- /* Reset and enable this counter */
- writel(CNT_CNTRL_RESET, &priv->regs->counter_cntrl1);
- return 0;
- }
- static int cadence_ttc_ofdata_to_platdata(struct udevice *dev)
- {
- struct cadence_ttc_priv *priv = dev_get_priv(dev);
- priv->regs = map_physmem(devfdt_get_addr(dev),
- sizeof(struct cadence_ttc_regs), MAP_NOCACHE);
- return 0;
- }
- static const struct timer_ops cadence_ttc_ops = {
- .get_count = cadence_ttc_get_count,
- };
- static const struct udevice_id cadence_ttc_ids[] = {
- { .compatible = "cdns,ttc" },
- {}
- };
- U_BOOT_DRIVER(cadence_ttc) = {
- .name = "cadence_ttc",
- .id = UCLASS_TIMER,
- .of_match = cadence_ttc_ids,
- .ofdata_to_platdata = cadence_ttc_ofdata_to_platdata,
- .priv_auto_alloc_size = sizeof(struct cadence_ttc_priv),
- .probe = cadence_ttc_probe,
- .ops = &cadence_ttc_ops,
- .flags = DM_FLAG_PRE_RELOC,
- };
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