The Clock framework allows users to specify a callback which is called after the clock's period has been updated. Some users need to also have a callback which is called before the clock period is updated. As the first step in adding support for notifying Clock users on pre-update events, add an argument to the ClockCallback to specify what event is being notified, and add an argument to the various functions for registering a callback to specify which events are of interest to that callback. Note that the documentation update renders correct the previously incorrect claim in 'Adding a new clock' that callbacks "will be explained in a following section". Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Luc Michel <luc@lmichel.fr> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210219144617.4782-2-peter.maydell@linaro.org
1096 lines
32 KiB
C
1096 lines
32 KiB
C
/*
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* Nuvoton NPCM7xx Clock Control Registers.
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*
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* Copyright 2020 Google LLC
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "qemu/osdep.h"
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#include "hw/misc/npcm7xx_clk.h"
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#include "hw/timer/npcm7xx_timer.h"
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#include "hw/qdev-clock.h"
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#include "migration/vmstate.h"
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#include "qemu/error-report.h"
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#include "qemu/log.h"
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#include "qemu/module.h"
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#include "qemu/timer.h"
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#include "qemu/units.h"
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#include "trace.h"
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#include "sysemu/watchdog.h"
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/*
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* The reference clock hz, and the SECCNT and CNTR25M registers in this module,
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* is always 25 MHz.
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*/
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#define NPCM7XX_CLOCK_REF_HZ (25000000)
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/* Register Field Definitions */
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#define NPCM7XX_CLK_WDRCR_CA9C BIT(0) /* Cortex A9 Cores */
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#define PLLCON_LOKI BIT(31)
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#define PLLCON_LOKS BIT(30)
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#define PLLCON_PWDEN BIT(12)
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#define PLLCON_FBDV(con) extract32((con), 16, 12)
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#define PLLCON_OTDV2(con) extract32((con), 13, 3)
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#define PLLCON_OTDV1(con) extract32((con), 8, 3)
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#define PLLCON_INDV(con) extract32((con), 0, 6)
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enum NPCM7xxCLKRegisters {
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NPCM7XX_CLK_CLKEN1,
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NPCM7XX_CLK_CLKSEL,
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NPCM7XX_CLK_CLKDIV1,
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NPCM7XX_CLK_PLLCON0,
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NPCM7XX_CLK_PLLCON1,
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NPCM7XX_CLK_SWRSTR,
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NPCM7XX_CLK_IPSRST1 = 0x20 / sizeof(uint32_t),
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NPCM7XX_CLK_IPSRST2,
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NPCM7XX_CLK_CLKEN2,
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NPCM7XX_CLK_CLKDIV2,
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NPCM7XX_CLK_CLKEN3,
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NPCM7XX_CLK_IPSRST3,
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NPCM7XX_CLK_WD0RCR,
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NPCM7XX_CLK_WD1RCR,
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NPCM7XX_CLK_WD2RCR,
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NPCM7XX_CLK_SWRSTC1,
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NPCM7XX_CLK_SWRSTC2,
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NPCM7XX_CLK_SWRSTC3,
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NPCM7XX_CLK_SWRSTC4,
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NPCM7XX_CLK_PLLCON2,
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NPCM7XX_CLK_CLKDIV3,
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NPCM7XX_CLK_CORSTC,
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NPCM7XX_CLK_PLLCONG,
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NPCM7XX_CLK_AHBCKFI,
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NPCM7XX_CLK_SECCNT,
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NPCM7XX_CLK_CNTR25M,
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NPCM7XX_CLK_REGS_END,
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};
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/*
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* These reset values were taken from version 0.91 of the NPCM750R data sheet.
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*
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* All are loaded on power-up reset. CLKENx and SWRSTR should also be loaded on
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* core domain reset, but this reset type is not yet supported by QEMU.
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*/
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static const uint32_t cold_reset_values[NPCM7XX_CLK_NR_REGS] = {
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[NPCM7XX_CLK_CLKEN1] = 0xffffffff,
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[NPCM7XX_CLK_CLKSEL] = 0x004aaaaa,
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[NPCM7XX_CLK_CLKDIV1] = 0x5413f855,
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[NPCM7XX_CLK_PLLCON0] = 0x00222101 | PLLCON_LOKI,
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[NPCM7XX_CLK_PLLCON1] = 0x00202101 | PLLCON_LOKI,
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[NPCM7XX_CLK_IPSRST1] = 0x00001000,
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[NPCM7XX_CLK_IPSRST2] = 0x80000000,
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[NPCM7XX_CLK_CLKEN2] = 0xffffffff,
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[NPCM7XX_CLK_CLKDIV2] = 0xaa4f8f9f,
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[NPCM7XX_CLK_CLKEN3] = 0xffffffff,
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[NPCM7XX_CLK_IPSRST3] = 0x03000000,
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[NPCM7XX_CLK_WD0RCR] = 0xffffffff,
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[NPCM7XX_CLK_WD1RCR] = 0xffffffff,
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[NPCM7XX_CLK_WD2RCR] = 0xffffffff,
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[NPCM7XX_CLK_SWRSTC1] = 0x00000003,
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[NPCM7XX_CLK_PLLCON2] = 0x00c02105 | PLLCON_LOKI,
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[NPCM7XX_CLK_CORSTC] = 0x04000003,
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[NPCM7XX_CLK_PLLCONG] = 0x01228606 | PLLCON_LOKI,
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[NPCM7XX_CLK_AHBCKFI] = 0x000000c8,
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};
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/* The number of watchdogs that can trigger a reset. */
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#define NPCM7XX_NR_WATCHDOGS (3)
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/* Clock converter functions */
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#define TYPE_NPCM7XX_CLOCK_PLL "npcm7xx-clock-pll"
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#define NPCM7XX_CLOCK_PLL(obj) OBJECT_CHECK(NPCM7xxClockPLLState, \
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(obj), TYPE_NPCM7XX_CLOCK_PLL)
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#define TYPE_NPCM7XX_CLOCK_SEL "npcm7xx-clock-sel"
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#define NPCM7XX_CLOCK_SEL(obj) OBJECT_CHECK(NPCM7xxClockSELState, \
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(obj), TYPE_NPCM7XX_CLOCK_SEL)
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#define TYPE_NPCM7XX_CLOCK_DIVIDER "npcm7xx-clock-divider"
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#define NPCM7XX_CLOCK_DIVIDER(obj) OBJECT_CHECK(NPCM7xxClockDividerState, \
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(obj), TYPE_NPCM7XX_CLOCK_DIVIDER)
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static void npcm7xx_clk_update_pll(void *opaque)
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{
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NPCM7xxClockPLLState *s = opaque;
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uint32_t con = s->clk->regs[s->reg];
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uint64_t freq;
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/* The PLL is grounded if it is not locked yet. */
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if (con & PLLCON_LOKI) {
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freq = clock_get_hz(s->clock_in);
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freq *= PLLCON_FBDV(con);
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freq /= PLLCON_INDV(con) * PLLCON_OTDV1(con) * PLLCON_OTDV2(con);
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} else {
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freq = 0;
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}
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clock_update_hz(s->clock_out, freq);
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}
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static void npcm7xx_clk_update_sel(void *opaque)
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{
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NPCM7xxClockSELState *s = opaque;
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uint32_t index = extract32(s->clk->regs[NPCM7XX_CLK_CLKSEL], s->offset,
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s->len);
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if (index >= s->input_size) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: SEL index: %u out of range\n",
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__func__, index);
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index = 0;
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}
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clock_update_hz(s->clock_out, clock_get_hz(s->clock_in[index]));
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}
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static void npcm7xx_clk_update_divider(void *opaque)
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{
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NPCM7xxClockDividerState *s = opaque;
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uint32_t freq;
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freq = s->divide(s);
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clock_update_hz(s->clock_out, freq);
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}
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static uint32_t divide_by_constant(NPCM7xxClockDividerState *s)
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{
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return clock_get_hz(s->clock_in) / s->divisor;
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}
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static uint32_t divide_by_reg_divisor(NPCM7xxClockDividerState *s)
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{
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return clock_get_hz(s->clock_in) /
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(extract32(s->clk->regs[s->reg], s->offset, s->len) + 1);
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}
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static uint32_t divide_by_reg_divisor_times_2(NPCM7xxClockDividerState *s)
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{
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return divide_by_reg_divisor(s) / 2;
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}
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static uint32_t shift_by_reg_divisor(NPCM7xxClockDividerState *s)
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{
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return clock_get_hz(s->clock_in) >>
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extract32(s->clk->regs[s->reg], s->offset, s->len);
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}
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static NPCM7xxClockPLL find_pll_by_reg(enum NPCM7xxCLKRegisters reg)
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{
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switch (reg) {
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case NPCM7XX_CLK_PLLCON0:
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return NPCM7XX_CLOCK_PLL0;
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case NPCM7XX_CLK_PLLCON1:
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return NPCM7XX_CLOCK_PLL1;
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case NPCM7XX_CLK_PLLCON2:
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return NPCM7XX_CLOCK_PLL2;
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case NPCM7XX_CLK_PLLCONG:
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return NPCM7XX_CLOCK_PLLG;
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default:
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g_assert_not_reached();
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}
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}
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static void npcm7xx_clk_update_all_plls(NPCM7xxCLKState *clk)
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{
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int i;
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for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
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npcm7xx_clk_update_pll(&clk->plls[i]);
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}
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}
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static void npcm7xx_clk_update_all_sels(NPCM7xxCLKState *clk)
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{
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int i;
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for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
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npcm7xx_clk_update_sel(&clk->sels[i]);
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}
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}
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static void npcm7xx_clk_update_all_dividers(NPCM7xxCLKState *clk)
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{
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int i;
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for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
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npcm7xx_clk_update_divider(&clk->dividers[i]);
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}
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}
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static void npcm7xx_clk_update_all_clocks(NPCM7xxCLKState *clk)
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{
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clock_update_hz(clk->clkref, NPCM7XX_CLOCK_REF_HZ);
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npcm7xx_clk_update_all_plls(clk);
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npcm7xx_clk_update_all_sels(clk);
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npcm7xx_clk_update_all_dividers(clk);
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}
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/* Types of clock sources. */
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typedef enum ClockSrcType {
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CLKSRC_REF,
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CLKSRC_PLL,
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CLKSRC_SEL,
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CLKSRC_DIV,
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} ClockSrcType;
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typedef struct PLLInitInfo {
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const char *name;
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ClockSrcType src_type;
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int src_index;
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int reg;
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const char *public_name;
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} PLLInitInfo;
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typedef struct SELInitInfo {
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const char *name;
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uint8_t input_size;
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ClockSrcType src_type[NPCM7XX_CLK_SEL_MAX_INPUT];
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int src_index[NPCM7XX_CLK_SEL_MAX_INPUT];
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int offset;
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int len;
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const char *public_name;
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} SELInitInfo;
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typedef struct DividerInitInfo {
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const char *name;
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ClockSrcType src_type;
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int src_index;
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uint32_t (*divide)(NPCM7xxClockDividerState *s);
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int reg; /* not used when type == CONSTANT */
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int offset; /* not used when type == CONSTANT */
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int len; /* not used when type == CONSTANT */
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int divisor; /* used only when type == CONSTANT */
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const char *public_name;
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} DividerInitInfo;
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static const PLLInitInfo pll_init_info_list[] = {
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[NPCM7XX_CLOCK_PLL0] = {
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.name = "pll0",
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.src_type = CLKSRC_REF,
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.reg = NPCM7XX_CLK_PLLCON0,
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},
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[NPCM7XX_CLOCK_PLL1] = {
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.name = "pll1",
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.src_type = CLKSRC_REF,
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.reg = NPCM7XX_CLK_PLLCON1,
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},
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[NPCM7XX_CLOCK_PLL2] = {
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.name = "pll2",
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.src_type = CLKSRC_REF,
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.reg = NPCM7XX_CLK_PLLCON2,
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},
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[NPCM7XX_CLOCK_PLLG] = {
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.name = "pllg",
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.src_type = CLKSRC_REF,
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.reg = NPCM7XX_CLK_PLLCONG,
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},
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};
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static const SELInitInfo sel_init_info_list[] = {
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[NPCM7XX_CLOCK_PIXCKSEL] = {
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.name = "pixcksel",
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.input_size = 2,
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.src_type = {CLKSRC_PLL, CLKSRC_REF},
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.src_index = {NPCM7XX_CLOCK_PLLG, 0},
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.offset = 5,
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.len = 1,
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.public_name = "pixel-clock",
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},
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[NPCM7XX_CLOCK_MCCKSEL] = {
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.name = "mccksel",
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.input_size = 4,
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.src_type = {CLKSRC_DIV, CLKSRC_REF, CLKSRC_REF,
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/*MCBPCK, shouldn't be used in normal operation*/
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CLKSRC_REF},
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.src_index = {NPCM7XX_CLOCK_PLL1D2, 0, 0, 0},
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.offset = 12,
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.len = 2,
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.public_name = "mc-phy-clock",
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},
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[NPCM7XX_CLOCK_CPUCKSEL] = {
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.name = "cpucksel",
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.input_size = 4,
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.src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF,
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/*SYSBPCK, shouldn't be used in normal operation*/
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CLKSRC_REF},
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.src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0, 0},
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.offset = 0,
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.len = 2,
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.public_name = "system-clock",
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},
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[NPCM7XX_CLOCK_CLKOUTSEL] = {
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.name = "clkoutsel",
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.input_size = 5,
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.src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF,
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CLKSRC_PLL, CLKSRC_DIV},
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.src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
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NPCM7XX_CLOCK_PLLG, NPCM7XX_CLOCK_PLL2D2},
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.offset = 18,
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.len = 3,
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.public_name = "tock",
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},
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[NPCM7XX_CLOCK_UARTCKSEL] = {
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.name = "uartcksel",
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.input_size = 4,
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.src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
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.src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
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NPCM7XX_CLOCK_PLL2D2},
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.offset = 8,
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.len = 2,
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},
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[NPCM7XX_CLOCK_TIMCKSEL] = {
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.name = "timcksel",
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.input_size = 4,
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.src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
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.src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
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NPCM7XX_CLOCK_PLL2D2},
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.offset = 14,
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.len = 2,
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},
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[NPCM7XX_CLOCK_SDCKSEL] = {
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.name = "sdcksel",
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.input_size = 4,
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.src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
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.src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
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NPCM7XX_CLOCK_PLL2D2},
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.offset = 6,
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.len = 2,
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},
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[NPCM7XX_CLOCK_GFXMSEL] = {
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.name = "gfxmksel",
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.input_size = 2,
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.src_type = {CLKSRC_REF, CLKSRC_PLL},
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.src_index = {0, NPCM7XX_CLOCK_PLL2},
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.offset = 21,
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.len = 1,
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},
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[NPCM7XX_CLOCK_SUCKSEL] = {
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.name = "sucksel",
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.input_size = 4,
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.src_type = {CLKSRC_PLL, CLKSRC_DIV, CLKSRC_REF, CLKSRC_DIV},
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.src_index = {NPCM7XX_CLOCK_PLL0, NPCM7XX_CLOCK_PLL1D2, 0,
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NPCM7XX_CLOCK_PLL2D2},
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.offset = 10,
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.len = 2,
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},
|
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};
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|
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static const DividerInitInfo divider_init_info_list[] = {
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[NPCM7XX_CLOCK_PLL1D2] = {
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.name = "pll1d2",
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.src_type = CLKSRC_PLL,
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.src_index = NPCM7XX_CLOCK_PLL1,
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.divide = divide_by_constant,
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.divisor = 2,
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},
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[NPCM7XX_CLOCK_PLL2D2] = {
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.name = "pll2d2",
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.src_type = CLKSRC_PLL,
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.src_index = NPCM7XX_CLOCK_PLL2,
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.divide = divide_by_constant,
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.divisor = 2,
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},
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[NPCM7XX_CLOCK_MC_DIVIDER] = {
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.name = "mc-divider",
|
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.src_type = CLKSRC_SEL,
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.src_index = NPCM7XX_CLOCK_MCCKSEL,
|
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.divide = divide_by_constant,
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.divisor = 2,
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.public_name = "mc-clock"
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},
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[NPCM7XX_CLOCK_AXI_DIVIDER] = {
|
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.name = "axi-divider",
|
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.src_type = CLKSRC_SEL,
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.src_index = NPCM7XX_CLOCK_CPUCKSEL,
|
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.divide = shift_by_reg_divisor,
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.reg = NPCM7XX_CLK_CLKDIV1,
|
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.offset = 0,
|
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.len = 1,
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.public_name = "clk2"
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},
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[NPCM7XX_CLOCK_AHB_DIVIDER] = {
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.name = "ahb-divider",
|
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.src_type = CLKSRC_DIV,
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.src_index = NPCM7XX_CLOCK_AXI_DIVIDER,
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.divide = divide_by_reg_divisor,
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.reg = NPCM7XX_CLK_CLKDIV1,
|
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.offset = 26,
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.len = 2,
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.public_name = "clk4"
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},
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[NPCM7XX_CLOCK_AHB3_DIVIDER] = {
|
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.name = "ahb3-divider",
|
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.src_type = CLKSRC_DIV,
|
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.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
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.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV1,
|
|
.offset = 6,
|
|
.len = 5,
|
|
.public_name = "ahb3-spi3-clock"
|
|
},
|
|
[NPCM7XX_CLOCK_SPI0_DIVIDER] = {
|
|
.name = "spi0-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
|
.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV3,
|
|
.offset = 6,
|
|
.len = 5,
|
|
.public_name = "spi0-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_SPIX_DIVIDER] = {
|
|
.name = "spix-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
|
.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV3,
|
|
.offset = 1,
|
|
.len = 5,
|
|
.public_name = "spix-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_APB1_DIVIDER] = {
|
|
.name = "apb1-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
|
.divide = shift_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 24,
|
|
.len = 2,
|
|
.public_name = "apb1-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_APB2_DIVIDER] = {
|
|
.name = "apb2-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
|
.divide = shift_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 26,
|
|
.len = 2,
|
|
.public_name = "apb2-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_APB3_DIVIDER] = {
|
|
.name = "apb3-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
|
.divide = shift_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 28,
|
|
.len = 2,
|
|
.public_name = "apb3-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_APB4_DIVIDER] = {
|
|
.name = "apb4-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
|
.divide = shift_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 30,
|
|
.len = 2,
|
|
.public_name = "apb4-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_APB5_DIVIDER] = {
|
|
.name = "apb5-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_AHB_DIVIDER,
|
|
.divide = shift_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 22,
|
|
.len = 2,
|
|
.public_name = "apb5-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_CLKOUT_DIVIDER] = {
|
|
.name = "clkout-divider",
|
|
.src_type = CLKSRC_SEL,
|
|
.src_index = NPCM7XX_CLOCK_CLKOUTSEL,
|
|
.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 16,
|
|
.len = 5,
|
|
.public_name = "clkout",
|
|
},
|
|
[NPCM7XX_CLOCK_UART_DIVIDER] = {
|
|
.name = "uart-divider",
|
|
.src_type = CLKSRC_SEL,
|
|
.src_index = NPCM7XX_CLOCK_UARTCKSEL,
|
|
.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV1,
|
|
.offset = 16,
|
|
.len = 5,
|
|
.public_name = "uart-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_TIMER_DIVIDER] = {
|
|
.name = "timer-divider",
|
|
.src_type = CLKSRC_SEL,
|
|
.src_index = NPCM7XX_CLOCK_TIMCKSEL,
|
|
.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV1,
|
|
.offset = 21,
|
|
.len = 5,
|
|
.public_name = "timer-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_ADC_DIVIDER] = {
|
|
.name = "adc-divider",
|
|
.src_type = CLKSRC_DIV,
|
|
.src_index = NPCM7XX_CLOCK_TIMER_DIVIDER,
|
|
.divide = shift_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV1,
|
|
.offset = 28,
|
|
.len = 3,
|
|
.public_name = "adc-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_MMC_DIVIDER] = {
|
|
.name = "mmc-divider",
|
|
.src_type = CLKSRC_SEL,
|
|
.src_index = NPCM7XX_CLOCK_SDCKSEL,
|
|
.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV1,
|
|
.offset = 11,
|
|
.len = 5,
|
|
.public_name = "mmc-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_SDHC_DIVIDER] = {
|
|
.name = "sdhc-divider",
|
|
.src_type = CLKSRC_SEL,
|
|
.src_index = NPCM7XX_CLOCK_SDCKSEL,
|
|
.divide = divide_by_reg_divisor_times_2,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 0,
|
|
.len = 4,
|
|
.public_name = "sdhc-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_GFXM_DIVIDER] = {
|
|
.name = "gfxm-divider",
|
|
.src_type = CLKSRC_SEL,
|
|
.src_index = NPCM7XX_CLOCK_GFXMSEL,
|
|
.divide = divide_by_constant,
|
|
.divisor = 3,
|
|
.public_name = "gfxm-clock",
|
|
},
|
|
[NPCM7XX_CLOCK_UTMI_DIVIDER] = {
|
|
.name = "utmi-divider",
|
|
.src_type = CLKSRC_SEL,
|
|
.src_index = NPCM7XX_CLOCK_SUCKSEL,
|
|
.divide = divide_by_reg_divisor,
|
|
.reg = NPCM7XX_CLK_CLKDIV2,
|
|
.offset = 8,
|
|
.len = 5,
|
|
.public_name = "utmi-clock",
|
|
},
|
|
};
|
|
|
|
static void npcm7xx_clk_update_pll_cb(void *opaque, ClockEvent event)
|
|
{
|
|
npcm7xx_clk_update_pll(opaque);
|
|
}
|
|
|
|
static void npcm7xx_clk_pll_init(Object *obj)
|
|
{
|
|
NPCM7xxClockPLLState *pll = NPCM7XX_CLOCK_PLL(obj);
|
|
|
|
pll->clock_in = qdev_init_clock_in(DEVICE(pll), "clock-in",
|
|
npcm7xx_clk_update_pll_cb, pll,
|
|
ClockUpdate);
|
|
pll->clock_out = qdev_init_clock_out(DEVICE(pll), "clock-out");
|
|
}
|
|
|
|
static void npcm7xx_clk_update_sel_cb(void *opaque, ClockEvent event)
|
|
{
|
|
npcm7xx_clk_update_sel(opaque);
|
|
}
|
|
|
|
static void npcm7xx_clk_sel_init(Object *obj)
|
|
{
|
|
int i;
|
|
NPCM7xxClockSELState *sel = NPCM7XX_CLOCK_SEL(obj);
|
|
|
|
for (i = 0; i < NPCM7XX_CLK_SEL_MAX_INPUT; ++i) {
|
|
sel->clock_in[i] = qdev_init_clock_in(DEVICE(sel),
|
|
g_strdup_printf("clock-in[%d]", i),
|
|
npcm7xx_clk_update_sel_cb, sel, ClockUpdate);
|
|
}
|
|
sel->clock_out = qdev_init_clock_out(DEVICE(sel), "clock-out");
|
|
}
|
|
|
|
static void npcm7xx_clk_update_divider_cb(void *opaque, ClockEvent event)
|
|
{
|
|
npcm7xx_clk_update_divider(opaque);
|
|
}
|
|
|
|
static void npcm7xx_clk_divider_init(Object *obj)
|
|
{
|
|
NPCM7xxClockDividerState *div = NPCM7XX_CLOCK_DIVIDER(obj);
|
|
|
|
div->clock_in = qdev_init_clock_in(DEVICE(div), "clock-in",
|
|
npcm7xx_clk_update_divider_cb,
|
|
div, ClockUpdate);
|
|
div->clock_out = qdev_init_clock_out(DEVICE(div), "clock-out");
|
|
}
|
|
|
|
static void npcm7xx_init_clock_pll(NPCM7xxClockPLLState *pll,
|
|
NPCM7xxCLKState *clk, const PLLInitInfo *init_info)
|
|
{
|
|
pll->name = init_info->name;
|
|
pll->clk = clk;
|
|
pll->reg = init_info->reg;
|
|
if (init_info->public_name != NULL) {
|
|
qdev_alias_clock(DEVICE(pll), "clock-out", DEVICE(clk),
|
|
init_info->public_name);
|
|
}
|
|
}
|
|
|
|
static void npcm7xx_init_clock_sel(NPCM7xxClockSELState *sel,
|
|
NPCM7xxCLKState *clk, const SELInitInfo *init_info)
|
|
{
|
|
int input_size = init_info->input_size;
|
|
|
|
sel->name = init_info->name;
|
|
sel->clk = clk;
|
|
sel->input_size = init_info->input_size;
|
|
g_assert(input_size <= NPCM7XX_CLK_SEL_MAX_INPUT);
|
|
sel->offset = init_info->offset;
|
|
sel->len = init_info->len;
|
|
if (init_info->public_name != NULL) {
|
|
qdev_alias_clock(DEVICE(sel), "clock-out", DEVICE(clk),
|
|
init_info->public_name);
|
|
}
|
|
}
|
|
|
|
static void npcm7xx_init_clock_divider(NPCM7xxClockDividerState *div,
|
|
NPCM7xxCLKState *clk, const DividerInitInfo *init_info)
|
|
{
|
|
div->name = init_info->name;
|
|
div->clk = clk;
|
|
|
|
div->divide = init_info->divide;
|
|
if (div->divide == divide_by_constant) {
|
|
div->divisor = init_info->divisor;
|
|
} else {
|
|
div->reg = init_info->reg;
|
|
div->offset = init_info->offset;
|
|
div->len = init_info->len;
|
|
}
|
|
if (init_info->public_name != NULL) {
|
|
qdev_alias_clock(DEVICE(div), "clock-out", DEVICE(clk),
|
|
init_info->public_name);
|
|
}
|
|
}
|
|
|
|
static Clock *npcm7xx_get_clock(NPCM7xxCLKState *clk, ClockSrcType type,
|
|
int index)
|
|
{
|
|
switch (type) {
|
|
case CLKSRC_REF:
|
|
return clk->clkref;
|
|
case CLKSRC_PLL:
|
|
return clk->plls[index].clock_out;
|
|
case CLKSRC_SEL:
|
|
return clk->sels[index].clock_out;
|
|
case CLKSRC_DIV:
|
|
return clk->dividers[index].clock_out;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static void npcm7xx_connect_clocks(NPCM7xxCLKState *clk)
|
|
{
|
|
int i, j;
|
|
Clock *src;
|
|
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
|
|
src = npcm7xx_get_clock(clk, pll_init_info_list[i].src_type,
|
|
pll_init_info_list[i].src_index);
|
|
clock_set_source(clk->plls[i].clock_in, src);
|
|
}
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
|
|
for (j = 0; j < sel_init_info_list[i].input_size; ++j) {
|
|
src = npcm7xx_get_clock(clk, sel_init_info_list[i].src_type[j],
|
|
sel_init_info_list[i].src_index[j]);
|
|
clock_set_source(clk->sels[i].clock_in[j], src);
|
|
}
|
|
}
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
|
|
src = npcm7xx_get_clock(clk, divider_init_info_list[i].src_type,
|
|
divider_init_info_list[i].src_index);
|
|
clock_set_source(clk->dividers[i].clock_in, src);
|
|
}
|
|
}
|
|
|
|
static uint64_t npcm7xx_clk_read(void *opaque, hwaddr offset, unsigned size)
|
|
{
|
|
uint32_t reg = offset / sizeof(uint32_t);
|
|
NPCM7xxCLKState *s = opaque;
|
|
int64_t now_ns;
|
|
uint32_t value = 0;
|
|
|
|
if (reg >= NPCM7XX_CLK_NR_REGS) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: offset 0x%04" HWADDR_PRIx " out of range\n",
|
|
__func__, offset);
|
|
return 0;
|
|
}
|
|
|
|
switch (reg) {
|
|
case NPCM7XX_CLK_SWRSTR:
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: register @ 0x%04" HWADDR_PRIx " is write-only\n",
|
|
__func__, offset);
|
|
break;
|
|
|
|
case NPCM7XX_CLK_SECCNT:
|
|
now_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
value = (now_ns - s->ref_ns) / NANOSECONDS_PER_SECOND;
|
|
break;
|
|
|
|
case NPCM7XX_CLK_CNTR25M:
|
|
now_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
/*
|
|
* This register counts 25 MHz cycles, updating every 640 ns. It rolls
|
|
* over to zero every second.
|
|
*
|
|
* The 4 LSBs are always zero: (1e9 / 640) << 4 = 25000000.
|
|
*/
|
|
value = (((now_ns - s->ref_ns) / 640) << 4) % NPCM7XX_CLOCK_REF_HZ;
|
|
break;
|
|
|
|
default:
|
|
value = s->regs[reg];
|
|
break;
|
|
};
|
|
|
|
trace_npcm7xx_clk_read(offset, value);
|
|
|
|
return value;
|
|
}
|
|
|
|
static void npcm7xx_clk_write(void *opaque, hwaddr offset,
|
|
uint64_t v, unsigned size)
|
|
{
|
|
uint32_t reg = offset / sizeof(uint32_t);
|
|
NPCM7xxCLKState *s = opaque;
|
|
uint32_t value = v;
|
|
|
|
trace_npcm7xx_clk_write(offset, value);
|
|
|
|
if (reg >= NPCM7XX_CLK_NR_REGS) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: offset 0x%04" HWADDR_PRIx " out of range\n",
|
|
__func__, offset);
|
|
return;
|
|
}
|
|
|
|
switch (reg) {
|
|
case NPCM7XX_CLK_SWRSTR:
|
|
qemu_log_mask(LOG_UNIMP, "%s: SW reset not implemented: 0x%02x\n",
|
|
__func__, value);
|
|
value = 0;
|
|
break;
|
|
|
|
case NPCM7XX_CLK_PLLCON0:
|
|
case NPCM7XX_CLK_PLLCON1:
|
|
case NPCM7XX_CLK_PLLCON2:
|
|
case NPCM7XX_CLK_PLLCONG:
|
|
if (value & PLLCON_PWDEN) {
|
|
/* Power down -- clear lock and indicate loss of lock */
|
|
value &= ~PLLCON_LOKI;
|
|
value |= PLLCON_LOKS;
|
|
} else {
|
|
/* Normal mode -- assume always locked */
|
|
value |= PLLCON_LOKI;
|
|
/* Keep LOKS unchanged unless cleared by writing 1 */
|
|
if (value & PLLCON_LOKS) {
|
|
value &= ~PLLCON_LOKS;
|
|
} else {
|
|
value |= (value & PLLCON_LOKS);
|
|
}
|
|
}
|
|
/* Only update PLL when it is locked. */
|
|
if (value & PLLCON_LOKI) {
|
|
npcm7xx_clk_update_pll(&s->plls[find_pll_by_reg(reg)]);
|
|
}
|
|
break;
|
|
|
|
case NPCM7XX_CLK_CLKSEL:
|
|
npcm7xx_clk_update_all_sels(s);
|
|
break;
|
|
|
|
case NPCM7XX_CLK_CLKDIV1:
|
|
case NPCM7XX_CLK_CLKDIV2:
|
|
case NPCM7XX_CLK_CLKDIV3:
|
|
npcm7xx_clk_update_all_dividers(s);
|
|
break;
|
|
|
|
case NPCM7XX_CLK_CNTR25M:
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: register @ 0x%04" HWADDR_PRIx " is read-only\n",
|
|
__func__, offset);
|
|
return;
|
|
}
|
|
|
|
s->regs[reg] = value;
|
|
}
|
|
|
|
/* Perform reset action triggered by a watchdog */
|
|
static void npcm7xx_clk_perform_watchdog_reset(void *opaque, int n,
|
|
int level)
|
|
{
|
|
NPCM7xxCLKState *clk = NPCM7XX_CLK(opaque);
|
|
uint32_t rcr;
|
|
|
|
g_assert(n >= 0 && n <= NPCM7XX_NR_WATCHDOGS);
|
|
rcr = clk->regs[NPCM7XX_CLK_WD0RCR + n];
|
|
if (rcr & NPCM7XX_CLK_WDRCR_CA9C) {
|
|
watchdog_perform_action();
|
|
} else {
|
|
qemu_log_mask(LOG_UNIMP,
|
|
"%s: only CPU reset is implemented. (requested 0x%" PRIx32")\n",
|
|
__func__, rcr);
|
|
}
|
|
}
|
|
|
|
static const struct MemoryRegionOps npcm7xx_clk_ops = {
|
|
.read = npcm7xx_clk_read,
|
|
.write = npcm7xx_clk_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.valid = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
.unaligned = false,
|
|
},
|
|
};
|
|
|
|
static void npcm7xx_clk_enter_reset(Object *obj, ResetType type)
|
|
{
|
|
NPCM7xxCLKState *s = NPCM7XX_CLK(obj);
|
|
|
|
QEMU_BUILD_BUG_ON(sizeof(s->regs) != sizeof(cold_reset_values));
|
|
|
|
switch (type) {
|
|
case RESET_TYPE_COLD:
|
|
memcpy(s->regs, cold_reset_values, sizeof(cold_reset_values));
|
|
s->ref_ns = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
npcm7xx_clk_update_all_clocks(s);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* A small number of registers need to be reset on a core domain reset,
|
|
* but no such reset type exists yet.
|
|
*/
|
|
qemu_log_mask(LOG_UNIMP, "%s: reset type %d not implemented.",
|
|
__func__, type);
|
|
}
|
|
|
|
static void npcm7xx_clk_init_clock_hierarchy(NPCM7xxCLKState *s)
|
|
{
|
|
int i;
|
|
|
|
s->clkref = qdev_init_clock_in(DEVICE(s), "clkref", NULL, NULL, 0);
|
|
|
|
/* First pass: init all converter modules */
|
|
QEMU_BUILD_BUG_ON(ARRAY_SIZE(pll_init_info_list) != NPCM7XX_CLOCK_NR_PLLS);
|
|
QEMU_BUILD_BUG_ON(ARRAY_SIZE(sel_init_info_list) != NPCM7XX_CLOCK_NR_SELS);
|
|
QEMU_BUILD_BUG_ON(ARRAY_SIZE(divider_init_info_list)
|
|
!= NPCM7XX_CLOCK_NR_DIVIDERS);
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
|
|
object_initialize_child(OBJECT(s), pll_init_info_list[i].name,
|
|
&s->plls[i], TYPE_NPCM7XX_CLOCK_PLL);
|
|
npcm7xx_init_clock_pll(&s->plls[i], s,
|
|
&pll_init_info_list[i]);
|
|
}
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
|
|
object_initialize_child(OBJECT(s), sel_init_info_list[i].name,
|
|
&s->sels[i], TYPE_NPCM7XX_CLOCK_SEL);
|
|
npcm7xx_init_clock_sel(&s->sels[i], s,
|
|
&sel_init_info_list[i]);
|
|
}
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
|
|
object_initialize_child(OBJECT(s), divider_init_info_list[i].name,
|
|
&s->dividers[i], TYPE_NPCM7XX_CLOCK_DIVIDER);
|
|
npcm7xx_init_clock_divider(&s->dividers[i], s,
|
|
÷r_init_info_list[i]);
|
|
}
|
|
|
|
/* Second pass: connect converter modules */
|
|
npcm7xx_connect_clocks(s);
|
|
|
|
clock_update_hz(s->clkref, NPCM7XX_CLOCK_REF_HZ);
|
|
}
|
|
|
|
static void npcm7xx_clk_init(Object *obj)
|
|
{
|
|
NPCM7xxCLKState *s = NPCM7XX_CLK(obj);
|
|
|
|
memory_region_init_io(&s->iomem, obj, &npcm7xx_clk_ops, s,
|
|
TYPE_NPCM7XX_CLK, 4 * KiB);
|
|
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
|
|
}
|
|
|
|
static int npcm7xx_clk_post_load(void *opaque, int version_id)
|
|
{
|
|
if (version_id >= 1) {
|
|
NPCM7xxCLKState *clk = opaque;
|
|
|
|
npcm7xx_clk_update_all_clocks(clk);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void npcm7xx_clk_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
int i;
|
|
NPCM7xxCLKState *s = NPCM7XX_CLK(dev);
|
|
|
|
qdev_init_gpio_in_named(DEVICE(s), npcm7xx_clk_perform_watchdog_reset,
|
|
NPCM7XX_WATCHDOG_RESET_GPIO_IN, NPCM7XX_NR_WATCHDOGS);
|
|
npcm7xx_clk_init_clock_hierarchy(s);
|
|
|
|
/* Realize child devices */
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_PLLS; ++i) {
|
|
if (!qdev_realize(DEVICE(&s->plls[i]), NULL, errp)) {
|
|
return;
|
|
}
|
|
}
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_SELS; ++i) {
|
|
if (!qdev_realize(DEVICE(&s->sels[i]), NULL, errp)) {
|
|
return;
|
|
}
|
|
}
|
|
for (i = 0; i < NPCM7XX_CLOCK_NR_DIVIDERS; ++i) {
|
|
if (!qdev_realize(DEVICE(&s->dividers[i]), NULL, errp)) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static const VMStateDescription vmstate_npcm7xx_clk_pll = {
|
|
.name = "npcm7xx-clock-pll",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_CLOCK(clock_in, NPCM7xxClockPLLState),
|
|
VMSTATE_END_OF_LIST(),
|
|
},
|
|
};
|
|
|
|
static const VMStateDescription vmstate_npcm7xx_clk_sel = {
|
|
.name = "npcm7xx-clock-sel",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(clock_in, NPCM7xxClockSELState,
|
|
NPCM7XX_CLK_SEL_MAX_INPUT, 0, vmstate_clock, Clock),
|
|
VMSTATE_END_OF_LIST(),
|
|
},
|
|
};
|
|
|
|
static const VMStateDescription vmstate_npcm7xx_clk_divider = {
|
|
.name = "npcm7xx-clock-divider",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_CLOCK(clock_in, NPCM7xxClockDividerState),
|
|
VMSTATE_END_OF_LIST(),
|
|
},
|
|
};
|
|
|
|
static const VMStateDescription vmstate_npcm7xx_clk = {
|
|
.name = "npcm7xx-clk",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.post_load = npcm7xx_clk_post_load,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT32_ARRAY(regs, NPCM7xxCLKState, NPCM7XX_CLK_NR_REGS),
|
|
VMSTATE_INT64(ref_ns, NPCM7xxCLKState),
|
|
VMSTATE_CLOCK(clkref, NPCM7xxCLKState),
|
|
VMSTATE_END_OF_LIST(),
|
|
},
|
|
};
|
|
|
|
static void npcm7xx_clk_pll_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->desc = "NPCM7xx Clock PLL Module";
|
|
dc->vmsd = &vmstate_npcm7xx_clk_pll;
|
|
}
|
|
|
|
static void npcm7xx_clk_sel_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->desc = "NPCM7xx Clock SEL Module";
|
|
dc->vmsd = &vmstate_npcm7xx_clk_sel;
|
|
}
|
|
|
|
static void npcm7xx_clk_divider_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->desc = "NPCM7xx Clock Divider Module";
|
|
dc->vmsd = &vmstate_npcm7xx_clk_divider;
|
|
}
|
|
|
|
static void npcm7xx_clk_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
ResettableClass *rc = RESETTABLE_CLASS(klass);
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
QEMU_BUILD_BUG_ON(NPCM7XX_CLK_REGS_END > NPCM7XX_CLK_NR_REGS);
|
|
|
|
dc->desc = "NPCM7xx Clock Control Registers";
|
|
dc->vmsd = &vmstate_npcm7xx_clk;
|
|
dc->realize = npcm7xx_clk_realize;
|
|
rc->phases.enter = npcm7xx_clk_enter_reset;
|
|
}
|
|
|
|
static const TypeInfo npcm7xx_clk_pll_info = {
|
|
.name = TYPE_NPCM7XX_CLOCK_PLL,
|
|
.parent = TYPE_DEVICE,
|
|
.instance_size = sizeof(NPCM7xxClockPLLState),
|
|
.instance_init = npcm7xx_clk_pll_init,
|
|
.class_init = npcm7xx_clk_pll_class_init,
|
|
};
|
|
|
|
static const TypeInfo npcm7xx_clk_sel_info = {
|
|
.name = TYPE_NPCM7XX_CLOCK_SEL,
|
|
.parent = TYPE_DEVICE,
|
|
.instance_size = sizeof(NPCM7xxClockSELState),
|
|
.instance_init = npcm7xx_clk_sel_init,
|
|
.class_init = npcm7xx_clk_sel_class_init,
|
|
};
|
|
|
|
static const TypeInfo npcm7xx_clk_divider_info = {
|
|
.name = TYPE_NPCM7XX_CLOCK_DIVIDER,
|
|
.parent = TYPE_DEVICE,
|
|
.instance_size = sizeof(NPCM7xxClockDividerState),
|
|
.instance_init = npcm7xx_clk_divider_init,
|
|
.class_init = npcm7xx_clk_divider_class_init,
|
|
};
|
|
|
|
static const TypeInfo npcm7xx_clk_info = {
|
|
.name = TYPE_NPCM7XX_CLK,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(NPCM7xxCLKState),
|
|
.instance_init = npcm7xx_clk_init,
|
|
.class_init = npcm7xx_clk_class_init,
|
|
};
|
|
|
|
static void npcm7xx_clk_register_type(void)
|
|
{
|
|
type_register_static(&npcm7xx_clk_pll_info);
|
|
type_register_static(&npcm7xx_clk_sel_info);
|
|
type_register_static(&npcm7xx_clk_divider_info);
|
|
type_register_static(&npcm7xx_clk_info);
|
|
}
|
|
type_init(npcm7xx_clk_register_type);
|