+++ /dev/null
-/*
- * clock.c
- *
- * clocks for AM33XX based boards
- *
- * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <common.h>
-#include <asm/arch/cpu.h>
-#include <asm/arch/clock.h>
-#include <asm/arch/hardware.h>
-#include <asm/io.h>
-
-#define PRCM_MOD_EN 0x2
-#define PRCM_FORCE_WAKEUP 0x2
-#define PRCM_FUNCTL 0x0
-
-#define PRCM_EMIF_CLK_ACTIVITY BIT(2)
-#define PRCM_L3_GCLK_ACTIVITY BIT(4)
-
-#define PLL_BYPASS_MODE 0x4
-#define ST_MN_BYPASS 0x00000100
-#define ST_DPLL_CLK 0x00000001
-#define CLK_SEL_MASK 0x7ffff
-#define CLK_DIV_MASK 0x1f
-#define CLK_DIV2_MASK 0x7f
-#define CLK_SEL_SHIFT 0x8
-#define CLK_MODE_MASK 0x7
-#define CLK_MODE_SEL 0x7
-#define DPLL_CLKDCOLDO_GATE_CTRL 0x300
-
-
-const struct cm_perpll *cmper = (struct cm_perpll *)CM_PER;
-const struct cm_wkuppll *cmwkup = (struct cm_wkuppll *)CM_WKUP;
-const struct cm_dpll *cmdpll = (struct cm_dpll *)CM_DPLL;
-const struct cm_rtc *cmrtc = (struct cm_rtc *)CM_RTC;
-
-#ifdef CONFIG_SPL_BUILD
-#define enable_clk(reg, val) __enable_clk(#reg, ®, val)
-
-static void __enable_clk(const char *name, const void *reg, u32 mask)
-{
- unsigned long timeout = 10000000;
-
- writel(mask, reg);
- while (readl(reg) != mask)
- /* poor man's timeout, since timers not initialized */
- if (timeout-- == 0)
- /* no error message, since console not yet available */
- break;
-}
-
-static void enable_interface_clocks(void)
-{
- /* Enable all the Interconnect Modules */
- enable_clk(cmper->l3clkctrl, PRCM_MOD_EN);
- enable_clk(cmper->l4lsclkctrl, PRCM_MOD_EN);
- enable_clk(cmper->l4fwclkctrl, PRCM_MOD_EN);
- enable_clk(cmwkup->wkl4wkclkctrl, PRCM_MOD_EN);
- enable_clk(cmper->l3instrclkctrl, PRCM_MOD_EN);
- enable_clk(cmper->l4hsclkctrl, PRCM_MOD_EN);
-#ifdef CONFIG_HW_WATCHDOG
- enable_clk(cmwkup->wdtimer1ctrl, PRCM_MOD_EN);
-#endif
- /* GPIO0 */
- enable_clk(cmwkup->wkgpio0clkctrl, PRCM_MOD_EN);
-}
-
-/*
- * Force power domain wake up transition
- * Ensure that the corresponding interface clock is active before
- * using the peripheral
- */
-static void power_domain_wkup_transition(void)
-{
- writel(PRCM_FORCE_WAKEUP, &cmper->l3clkstctrl);
- writel(PRCM_FORCE_WAKEUP, &cmper->l4lsclkstctrl);
- writel(PRCM_FORCE_WAKEUP, &cmwkup->wkclkstctrl);
- writel(PRCM_FORCE_WAKEUP, &cmper->l4fwclkstctrl);
- writel(PRCM_FORCE_WAKEUP, &cmper->l3sclkstctrl);
-}
-
-/*
- * Enable the peripheral clock for required peripherals
- */
-static void enable_per_clocks(void)
-{
- /* Enable the control module though RBL would have done it*/
- enable_clk(cmwkup->wkctrlclkctrl, PRCM_MOD_EN);
- /* Enable the timer2 clock */
- enable_clk(cmper->timer2clkctrl, PRCM_MOD_EN);
- /* Select the Master osc 24 MHZ as Timer2 clock source */
- writel(0x1, &cmdpll->clktimer2clk);
-
-#ifdef CONFIG_SYS_NS16550_COM1
- /* UART0 */
- enable_clk(cmwkup->wkup_uart0ctrl, PRCM_MOD_EN);
-#endif
-#ifdef CONFIG_SYS_NS16550_COM2
- enable_clk(cmper->uart1clkctrl, PRCM_MOD_EN);
-#endif
-#ifdef CONFIG_SYS_NS16550_COM3
- enable_clk(cmper->uart2clkctrl, PRCM_MOD_EN);
-#endif
-#ifdef CONFIG_SYS_NS16550_COM4
- enable_clk(cmper->uart3clkctrl, PRCM_MOD_EN);
-#endif
-#ifdef CONFIG_SYS_NS16550_COM5
- enable_clk(cmper->uart4clkctrl, PRCM_MOD_EN);
-#endif
-#ifdef CONFIG_SYS_NS16550_COM6
- enable_clk(cmper->uart5clkctrl, PRCM_MOD_EN);
-#endif
- /* GPMC */
- enable_clk(cmper->gpmcclkctrl, PRCM_MOD_EN);
-
- /* ELM */
- enable_clk(cmper->elmclkctrl, PRCM_MOD_EN);
-
- /* Ethernet */
- enable_clk(cmper->cpswclkstctrl, PRCM_MOD_EN);
- enable_clk(cmper->cpgmac0clkctrl, PRCM_MOD_EN);
-
- /* MMC */
-#ifndef CONFIG_OMAP_MMC_DEV_0
- enable_clk(cmper->mmc0clkctrl, PRCM_MOD_EN);
-#endif
-#ifdef CONFIG_OMAP_MMC_DEV_1
- enable_clk(cmper->mmc1clkctrl, PRCM_MOD_EN);
-#endif
- /* LCD */
- enable_clk(cmper->lcdclkctrl, PRCM_MOD_EN);
-
- /* i2c0 */
- enable_clk(cmwkup->wkup_i2c0ctrl, PRCM_MOD_EN);
-
- /* GPIO1-3 */
- enable_clk(cmper->gpio1clkctrl, PRCM_MOD_EN);
- enable_clk(cmper->gpio2clkctrl, PRCM_MOD_EN);
- enable_clk(cmper->gpio3clkctrl, PRCM_MOD_EN);
-
- /* i2c1 */
- enable_clk(cmper->i2c1clkctrl, PRCM_MOD_EN);
-
- /* spi0 */
- enable_clk(cmper->spi0clkctrl, PRCM_MOD_EN);
-
- /* rtc */
- enable_clk(cmrtc->rtcclkctrl, PRCM_MOD_EN);
-
- /* usb0 */
- enable_clk(cmper->usb0clkctrl, PRCM_MOD_EN);
-}
-#endif /* CONFIG_SPL_BUILD */
-
-void mpu_pll_config(int m)
-{
- u32 clkmode, clksel, div_m2;
-
- clkmode = readl(&cmwkup->clkmoddpllmpu);
- clksel = readl(&cmwkup->clkseldpllmpu);
- div_m2 = readl(&cmwkup->divm2dpllmpu);
-
- /* Set the PLL to bypass Mode */
- writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllmpu);
- while (readl(&cmwkup->idlestdpllmpu) != ST_MN_BYPASS)
- ;
-
- clksel &= ~CLK_SEL_MASK;
- clksel |= (m << CLK_SEL_SHIFT) | MPUPLL_N;
- writel(clksel, &cmwkup->clkseldpllmpu);
-
- div_m2 &= ~CLK_DIV_MASK;
- div_m2 |= MPUPLL_M2;
- writel(div_m2, &cmwkup->divm2dpllmpu);
-
- clkmode &= ~CLK_MODE_MASK;
- clkmode |= CLK_MODE_SEL;
- writel(clkmode, &cmwkup->clkmoddpllmpu);
-
- while (readl(&cmwkup->idlestdpllmpu) != ST_DPLL_CLK)
- ;
-}
-
-static void core_pll_config(int m)
-{
- u32 clkmode, clksel, div_m4, div_m5, div_m6;
-
- clkmode = readl(&cmwkup->clkmoddpllcore);
- clksel = readl(&cmwkup->clkseldpllcore);
- div_m4 = readl(&cmwkup->divm4dpllcore);
- div_m5 = readl(&cmwkup->divm5dpllcore);
- div_m6 = readl(&cmwkup->divm6dpllcore);
-
- /* Set the PLL to bypass Mode */
- writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllcore);
-
- while (readl(&cmwkup->idlestdpllcore) != ST_MN_BYPASS)
- ;
-
- clksel &= ~CLK_SEL_MASK;
- clksel |= ((m << CLK_SEL_SHIFT) | COREPLL_N);
- writel(clksel, &cmwkup->clkseldpllcore);
-
- div_m4 &= ~CLK_DIV_MASK;
- div_m4 |= COREPLL_M4;
- writel(div_m4, &cmwkup->divm4dpllcore);
-
- div_m5 &= ~CLK_DIV_MASK;
- div_m5 |= COREPLL_M5;
- writel(div_m5, &cmwkup->divm5dpllcore);
-
- div_m6 &= ~CLK_DIV_MASK;
- div_m6 |= COREPLL_M6;
- writel(div_m6, &cmwkup->divm6dpllcore);
-
- clkmode &= ~CLK_MODE_MASK;
- clkmode |= CLK_MODE_SEL;
- writel(clkmode, &cmwkup->clkmoddpllcore);
-
- while (readl(&cmwkup->idlestdpllcore) != ST_DPLL_CLK)
- ;
-}
-
-static void per_pll_config(int m)
-{
- u32 clkmode, clksel, div_m2;
-
- clkmode = readl(&cmwkup->clkmoddpllper);
- clksel = readl(&cmwkup->clkseldpllper);
- div_m2 = readl(&cmwkup->divm2dpllper);
-
- /* Set the PLL to bypass Mode */
- writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllper);
-
- while (readl(&cmwkup->idlestdpllper) != ST_MN_BYPASS)
- ;
-
- clksel &= ~CLK_SEL_MASK;
- clksel |= (m << CLK_SEL_SHIFT) | PERPLL_N;
- writel(clksel, &cmwkup->clkseldpllper);
-
- div_m2 &= ~CLK_DIV2_MASK;
- div_m2 |= PERPLL_M2;
- writel(div_m2, &cmwkup->divm2dpllper);
-
- clkmode &= ~CLK_MODE_MASK;
- clkmode |= CLK_MODE_SEL;
- writel(clkmode, &cmwkup->clkmoddpllper);
-
- while (readl(&cmwkup->idlestdpllper) != ST_DPLL_CLK)
- ;
-
- writel(DPLL_CLKDCOLDO_GATE_CTRL, &cmwkup->clkdcoldodpllper);
-}
-
-static void disp_pll_config(int m)
-{
- u32 clkmode, clksel, div_m2;
-
- clkmode = readl(&cmwkup->clkmoddplldisp);
- clksel = readl(&cmwkup->clkseldplldisp);
- div_m2 = readl(&cmwkup->divm2dplldisp);
-
- /* Set the PLL to bypass Mode */
- writel(PLL_BYPASS_MODE, &cmwkup->clkmoddplldisp);
-
- while (!(readl(&cmwkup->idlestdplldisp) & ST_MN_BYPASS))
- ;
-
- clksel &= ~CLK_SEL_MASK;
- clksel |= (m << CLK_SEL_SHIFT) | DISPPLL_N;
- writel(clksel, &cmwkup->clkseldplldisp);
-
- div_m2 &= ~CLK_DIV2_MASK;
- div_m2 |= DISPPLL_M2;
- writel(div_m2, &cmwkup->divm2dplldisp);
-
- clkmode &= ~CLK_MODE_MASK;
- clkmode |= CLK_MODE_SEL;
- writel(clkmode, &cmwkup->clkmoddplldisp);
-
- while (!(readl(&cmwkup->idlestdplldisp) & ST_DPLL_CLK))
- ;
-}
-
-void ddr_pll_config(unsigned int ddrpll_m)
-{
- u32 clkmode, clksel, div_m2;
-
- clkmode = readl(&cmwkup->clkmoddpllddr);
- clksel = readl(&cmwkup->clkseldpllddr);
- div_m2 = readl(&cmwkup->divm2dpllddr);
-
- /* Set the PLL to bypass Mode */
- clkmode &= ~CLK_MODE_MASK;
- clkmode |= PLL_BYPASS_MODE;
- writel(clkmode, &cmwkup->clkmoddpllddr);
-
- /* Wait till bypass mode is enabled */
- while (!(readl(&cmwkup->idlestdpllddr) & ST_MN_BYPASS))
- ;
-
- clksel &= ~CLK_SEL_MASK;
- clksel |= (ddrpll_m << CLK_SEL_SHIFT) | DDRPLL_N;
- writel(clksel, &cmwkup->clkseldpllddr);
-
- div_m2 &= ~CLK_DIV_MASK;
- div_m2 |= DDRPLL_M2;
- writel(div_m2, &cmwkup->divm2dpllddr);
-
- clkmode &= ~CLK_MODE_MASK;
- clkmode |= CLK_MODE_SEL;
- writel(clkmode, &cmwkup->clkmoddpllddr);
-
- /* Wait till dpll is locked */
- while ((readl(&cmwkup->idlestdpllddr) & ST_DPLL_CLK) != ST_DPLL_CLK)
- ;
-}
-
-#ifdef CONFIG_SPL_BUILD
-void enable_emif_clocks(void)
-{
- /* Enable the EMIF_FW Functional clock */
- writel(PRCM_MOD_EN, &cmper->emiffwclkctrl);
- /* Enable EMIF0 Clock */
- writel(PRCM_MOD_EN, &cmper->emifclkctrl);
- /* Poll if module is functional */
- while ((readl(&cmper->emifclkctrl)) != PRCM_MOD_EN)
- ;
-}
-
-/*
- * Configure the PLL/PRCM for necessary peripherals
- */
-void pll_init()
-{
- mpu_pll_config(MPUPLL_M);
- core_pll_config(COREPLL_M);
- per_pll_config(PERPLL_M);
- disp_pll_config(DISPPLL_M);
-
- /* Enable the required interconnect clocks */
- enable_interface_clocks();
-
- /* Power domain wake up transition */
- power_domain_wkup_transition();
-
- /* Enable the required peripherals */
- enable_per_clocks();
-}
-#endif
-
-#define M(mn) (((mn) & CLK_SEL_MASK) >> CLK_SEL_SHIFT)
-#define N(mn) ((mn) & CLK_DIV2_MASK)
-
-unsigned long __clk_get_rate(u32 m_n, u32 div_m2)
-{
- unsigned long rate;
-
- div_m2 &= CLK_DIV_MASK;
- debug("M=%u N=%u M2=%u\n", M(m_n), N(m_n), div_m2);
- rate = V_OSCK / 1000 * M(m_n) / (N(m_n) + 1) / div_m2;
- debug("CLK = %lu.%03luMHz\n", rate / 1000, rate % 1000);
- return rate * 1000;
-}
-
-unsigned long lcdc_clk_rate(void)
-{
- return clk_get_rate(cmwkup, disp);
-}
-
-unsigned long mpu_clk_rate(void)
-{
- return clk_get_rate(cmwkup, mpu);
-}
-
-enum {
- CLK_MPU_PLL,
- CLK_CORE_PLL,
- CLK_PER_PLL,
- CLK_DISP_PLL,
- CLK_GPMC,
-};
-
-static struct clk_lookup {
- const char *name;
- unsigned int index;
-} am33xx_clk_lookup[] = {
- { "mpu", CLK_MPU_PLL, },
- { "core", CLK_CORE_PLL, },
- { "per", CLK_PER_PLL, },
- { "lcdc", CLK_DISP_PLL, },
- { "gpmc", CLK_GPMC, },
-};
-
-#define print_pll(dom, pll) { \
- u32 __pll = clk_get_rate(dom, pll); \
- printf("%-12s %4d.%03d MHz\n", #pll, \
- __pll / 1000000, __pll / 1000 % 1000); \
- }
-
-#define print_pll2(dom, n, pll) { \
- u32 __m_n = readl(&(dom)->clkseldpll##pll); \
- u32 __div = readl(&(dom)->divm##n##dpll##pll); \
- u32 __pll = __clk_get_rate(__m_n, __div); \
- printf("%-12s %4d.%03d MHz\n", #pll "_m" #n, \
- __pll / 1000000, __pll / 1000 % 1000); \
- }
-
-static void do_showclocks(void)
-{
- print_pll(cmwkup, mpu);
- print_pll2(cmwkup, 4, core);
- print_pll2(cmwkup, 5, core);
- print_pll2(cmwkup, 6, core);
- print_pll(cmwkup, ddr);
- print_pll(cmwkup, per);
- print_pll(cmwkup, disp);
-}
-
-int do_clocks(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[])
-{
- int i;
- unsigned long freq;
- unsigned long __attribute__((unused)) ref = ~0UL;
-
- if (argc < 2) {
- do_showclocks();
- return CMD_RET_SUCCESS;
- } else if (argc == 2 || argc > 4) {
- return CMD_RET_USAGE;
- }
-
- freq = simple_strtoul(argv[2], NULL, 0);
- if (freq < 1000) {
- printf("Invalid clock frequency %lu\n", freq);
- return CMD_RET_FAILURE;
- }
- if (argc > 3) {
- ref = simple_strtoul(argv[3], NULL, 0);
- }
- for (i = 0; i < ARRAY_SIZE(am33xx_clk_lookup); i++) {
- if (strcasecmp(argv[1], am33xx_clk_lookup[i].name) == 0) {
- switch (am33xx_clk_lookup[i].index) {
- case CLK_MPU_PLL:
- mpu_pll_config(freq / 1000000);
- break;
- case CLK_CORE_PLL:
- core_pll_config(freq / 1000000);
- break;
- case CLK_PER_PLL:
- per_pll_config(freq / 1000000);
- break;
- case CLK_DISP_PLL:
- disp_pll_config(freq / 1000000);
- break;
- default:
- printf("Cannot change %s clock\n",
- am33xx_clk_lookup[i].name);
- return CMD_RET_FAILURE;
- }
-
- printf("%s clock set to %lu.%03lu MHz\n",
- am33xx_clk_lookup[i].name,
- freq / 1000000, freq / 1000 % 1000);
- return CMD_RET_SUCCESS;
- }
- }
- if (i == ARRAY_SIZE(am33xx_clk_lookup)) {
- printf("clock %s not found; supported clocks are:\n", argv[1]);
- for (i = 0; i < ARRAY_SIZE(am33xx_clk_lookup); i++) {
- printf("\t%s\n", am33xx_clk_lookup[i].name);
- }
- } else {
- printf("Failed to set clock %s to %s MHz\n",
- argv[1], argv[2]);
- }
- return CMD_RET_FAILURE;
-}
-
-U_BOOT_CMD(
- clocks, 4, 0, do_clocks,
- "display/set clocks",
- " - display clock settings\n"
- "clocks <clkname> <freq> - set clock <clkname> to <freq> Hz"
-);
projects / karo-tx-uboot.git / blobdiff