mirror of
https://github.com/AsahiLinux/u-boot
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122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
/*
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* Andestech ATFTMR010 timer driver
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*
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* (C) Copyright 2016
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* Rick Chen, NDS32 Software Engineering, rick@andestech.com
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <timer.h>
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#include <linux/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Timer Control Register
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*/
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#define T3_UPDOWN (1 << 11)
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#define T2_UPDOWN (1 << 10)
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#define T1_UPDOWN (1 << 9)
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#define T3_OFENABLE (1 << 8)
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#define T3_CLOCK (1 << 7)
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#define T3_ENABLE (1 << 6)
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#define T2_OFENABLE (1 << 5)
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#define T2_CLOCK (1 << 4)
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#define T2_ENABLE (1 << 3)
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#define T1_OFENABLE (1 << 2)
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#define T1_CLOCK (1 << 1)
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#define T1_ENABLE (1 << 0)
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/*
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* Timer Interrupt State & Mask Registers
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*/
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#define T3_OVERFLOW (1 << 8)
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#define T3_MATCH2 (1 << 7)
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#define T3_MATCH1 (1 << 6)
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#define T2_OVERFLOW (1 << 5)
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#define T2_MATCH2 (1 << 4)
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#define T2_MATCH1 (1 << 3)
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#define T1_OVERFLOW (1 << 2)
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#define T1_MATCH2 (1 << 1)
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#define T1_MATCH1 (1 << 0)
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struct atftmr_timer_regs {
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u32 t1_counter; /* 0x00 */
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u32 t1_load; /* 0x04 */
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u32 t1_match1; /* 0x08 */
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u32 t1_match2; /* 0x0c */
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u32 t2_counter; /* 0x10 */
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u32 t2_load; /* 0x14 */
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u32 t2_match1; /* 0x18 */
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u32 t2_match2; /* 0x1c */
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u32 t3_counter; /* 0x20 */
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u32 t3_load; /* 0x24 */
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u32 t3_match1; /* 0x28 */
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u32 t3_match2; /* 0x2c */
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u32 cr; /* 0x30 */
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u32 int_state; /* 0x34 */
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u32 int_mask; /* 0x38 */
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};
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struct atftmr_timer_platdata {
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struct atftmr_timer_regs *regs;
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};
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static int atftmr_timer_get_count(struct udevice *dev, u64 *count)
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{
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struct atftmr_timer_platdata *plat = dev->platdata;
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struct atftmr_timer_regs *const regs = plat->regs;
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u32 val;
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val = readl(®s->t3_counter);
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*count = timer_conv_64(val);
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return 0;
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}
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static int atftmr_timer_probe(struct udevice *dev)
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{
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struct atftmr_timer_platdata *plat = dev->platdata;
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struct atftmr_timer_regs *const regs = plat->regs;
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u32 cr;
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writel(0, ®s->t3_load);
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writel(0, ®s->t3_counter);
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writel(TIMER_LOAD_VAL, ®s->t3_match1);
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writel(TIMER_LOAD_VAL, ®s->t3_match2);
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/* disable interrupts */
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writel(T3_MATCH1|T3_MATCH2|T3_OVERFLOW , ®s->int_mask);
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cr = readl(®s->cr);
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cr |= (T3_ENABLE|T3_UPDOWN);
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writel(cr, ®s->cr);
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return 0;
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}
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static int atftme_timer_ofdata_to_platdata(struct udevice *dev)
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{
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struct atftmr_timer_platdata *plat = dev_get_platdata(dev);
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plat->regs = map_physmem(dev_get_addr(dev),
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sizeof(struct atftmr_timer_regs),
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MAP_NOCACHE);
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return 0;
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}
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static const struct timer_ops ag101p_timer_ops = {
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.get_count = atftmr_timer_get_count,
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};
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static const struct udevice_id ag101p_timer_ids[] = {
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{ .compatible = "andestech,attmr010" },
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{}
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};
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U_BOOT_DRIVER(altera_timer) = {
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.name = "ag101p_timer",
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.id = UCLASS_TIMER,
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.of_match = ag101p_timer_ids,
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.ofdata_to_platdata = atftme_timer_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct atftmr_timer_platdata),
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.probe = atftmr_timer_probe,
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.ops = &ag101p_timer_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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