mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
343 lines
10 KiB
C
343 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015, Freescale Semiconductor, Inc.
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*/
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#include <asm/io.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/mc_cgm_regs.h>
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#include <asm/arch/mc_me_regs.h>
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#include <asm/arch/clock.h>
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/*
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* Select the clock reference for required pll.
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* pll - ARM_PLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_PLL.
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* refclk_freq - input referece clock frequency (FXOSC - 40 MHZ, FIRC - 48 MHZ)
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*/
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static int select_pll_source_clk(enum pll_type pll, u32 refclk_freq)
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{
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u32 clk_src;
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u32 pll_idx;
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volatile struct src *src = (struct src *)SRC_SOC_BASE_ADDR;
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/* select the pll clock source */
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switch (refclk_freq) {
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case FIRC_CLK_FREQ:
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clk_src = SRC_GPR1_FIRC_CLK_SOURCE;
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break;
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case XOSC_CLK_FREQ:
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clk_src = SRC_GPR1_XOSC_CLK_SOURCE;
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break;
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default:
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/* The clock frequency for the source clock is unknown */
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return -1;
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}
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/*
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* The hardware definition is not uniform, it has to calculate again
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* the recurrence formula.
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*/
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switch (pll) {
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case PERIPH_PLL:
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pll_idx = 3;
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break;
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case ENET_PLL:
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pll_idx = 1;
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break;
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case DDR_PLL:
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pll_idx = 2;
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break;
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default:
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pll_idx = pll;
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}
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writel(readl(&src->gpr1) | SRC_GPR1_PLL_SOURCE(pll_idx, clk_src),
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&src->gpr1);
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return 0;
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}
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static void entry_to_target_mode(u32 mode)
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{
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writel(mode | MC_ME_MCTL_KEY, MC_ME_MCTL);
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writel(mode | MC_ME_MCTL_INVERTEDKEY, MC_ME_MCTL);
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while ((readl(MC_ME_GS) & MC_ME_GS_S_MTRANS) != 0x00000000) ;
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}
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/*
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* Program the pll according to the input parameters.
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* pll - ARM_PLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_PLL.
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* refclk_freq - input reference clock frequency (FXOSC - 40 MHZ, FIRC - 48 MHZ)
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* freq - expected output frequency for PHY0
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* freq1 - expected output frequency for PHY1
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* dfs_nr - number of DFS modules for current PLL
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* dfs - array with the activation dfs field, mfn and mfi
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* plldv_prediv - divider of clkfreq_ref
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* plldv_mfd - loop multiplication factor divider
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* pllfd_mfn - numerator loop multiplication factor divider
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* Please consult the PLLDIG chapter of platform manual
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* before to use this function.
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*)
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*/
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static int program_pll(enum pll_type pll, u32 refclk_freq, u32 freq0, u32 freq1,
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u32 dfs_nr, u32 dfs[][DFS_PARAMS_Nr], u32 plldv_prediv,
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u32 plldv_mfd, u32 pllfd_mfn)
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{
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u32 i, rfdphi1, rfdphi, dfs_on = 0, fvco;
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/*
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* This formula is from platform reference manual (Rev. 1, 6/2015), PLLDIG chapter.
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*/
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fvco =
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(refclk_freq / plldv_prediv) * (plldv_mfd +
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pllfd_mfn / (float)20480);
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/*
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* VCO should have value in [ PLL_MIN_FREQ, PLL_MAX_FREQ ]. Please consult
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* the platform DataSheet in order to determine the allowed values.
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*/
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if (fvco < PLL_MIN_FREQ || fvco > PLL_MAX_FREQ) {
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return -1;
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}
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if (select_pll_source_clk(pll, refclk_freq) < 0) {
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return -1;
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}
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rfdphi = fvco / freq0;
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rfdphi1 = (freq1 == 0) ? 0 : fvco / freq1;
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writel(PLLDIG_PLLDV_RFDPHI1_SET(rfdphi1) |
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PLLDIG_PLLDV_RFDPHI_SET(rfdphi) |
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PLLDIG_PLLDV_PREDIV_SET(plldv_prediv) |
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PLLDIG_PLLDV_MFD(plldv_mfd), PLLDIG_PLLDV(pll));
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writel(readl(PLLDIG_PLLFD(pll)) | PLLDIG_PLLFD_MFN_SET(pllfd_mfn) |
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PLLDIG_PLLFD_SMDEN, PLLDIG_PLLFD(pll));
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/* switch on the pll in current mode */
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writel(readl(MC_ME_RUNn_MC(0)) | MC_ME_RUNMODE_MC_PLL(pll),
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MC_ME_RUNn_MC(0));
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entry_to_target_mode(MC_ME_MCTL_RUN0);
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/* Only ARM_PLL, ENET_PLL and DDR_PLL */
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if ((pll == ARM_PLL) || (pll == ENET_PLL) || (pll == DDR_PLL)) {
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/* DFS clk enable programming */
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writel(DFS_CTRL_DLL_RESET, DFS_CTRL(pll));
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writel(DFS_DLLPRG1_CPICTRL_SET(0x5) |
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DFS_DLLPRG1_VSETTLCTRL_SET(0x1) |
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DFS_DLLPRG1_CALBYPEN_SET(0x0) |
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DFS_DLLPRG1_DACIN_SET(0x1) | DFS_DLLPRG1_LCKWT_SET(0x0) |
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DFS_DLLPRG1_V2IGC_SET(0x5), DFS_DLLPRG1(pll));
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for (i = 0; i < dfs_nr; i++) {
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if (dfs[i][0]) {
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writel(DFS_DVPORTn_MFI_SET(dfs[i][2]) |
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DFS_DVPORTn_MFN_SET(dfs[i][1]),
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DFS_DVPORTn(pll, i));
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dfs_on |= (dfs[i][0] << i);
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}
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}
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writel(readl(DFS_CTRL(pll)) & ~DFS_CTRL_DLL_RESET,
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DFS_CTRL(pll));
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writel(readl(DFS_PORTRESET(pll)) &
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~DFS_PORTRESET_PORTRESET_SET(dfs_on),
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DFS_PORTRESET(pll));
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while ((readl(DFS_PORTSR(pll)) & dfs_on) != dfs_on) ;
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}
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entry_to_target_mode(MC_ME_MCTL_RUN0);
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return 0;
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}
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static void aux_source_clk_config(uintptr_t cgm_addr, u8 ac, u32 source)
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{
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/* select the clock source */
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writel(MC_CGM_ACn_SEL_SET(source), CGM_ACn_SC(cgm_addr, ac));
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}
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static void aux_div_clk_config(uintptr_t cgm_addr, u8 ac, u8 dc, u32 divider)
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{
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/* set the divider */
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writel(MC_CGM_ACn_DCm_DE | MC_CGM_ACn_DCm_PREDIV(divider),
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CGM_ACn_DCm(cgm_addr, ac, dc));
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}
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static void setup_sys_clocks(void)
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{
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/* set ARM PLL DFS 1 as SYSCLK */
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writel((readl(MC_ME_RUNn_MC(0)) & ~MC_ME_RUNMODE_MC_SYSCLK_MASK) |
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MC_ME_RUNMODE_MC_SYSCLK(0x2), MC_ME_RUNn_MC(0));
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entry_to_target_mode(MC_ME_MCTL_RUN0);
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/* select sysclks ARMPLL, ARMPLLDFS2, ARMPLLDFS3 */
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writel(MC_ME_RUNMODE_SEC_CC_I_SYSCLK
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(0x2,
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MC_ME_RUNMODE_SEC_CC_I_SYSCLK1_OFFSET) |
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MC_ME_RUNMODE_SEC_CC_I_SYSCLK(0x2,
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MC_ME_RUNMODE_SEC_CC_I_SYSCLK2_OFFSET)
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| MC_ME_RUNMODE_SEC_CC_I_SYSCLK(0x2,
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MC_ME_RUNMODE_SEC_CC_I_SYSCLK3_OFFSET),
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MC_ME_RUNn_SEC_CC_I(0));
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/* setup the sys clock divider for CORE_CLK (1000MHz) */
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writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x0),
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CGM_SC_DCn(MC_CGM1_BASE_ADDR, 0));
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/* setup the sys clock divider for CORE2_CLK (500MHz) */
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writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x1),
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CGM_SC_DCn(MC_CGM1_BASE_ADDR, 1));
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/* setup the sys clock divider for SYS3_CLK (266 MHz) */
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writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x0),
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CGM_SC_DCn(MC_CGM0_BASE_ADDR, 0));
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/* setup the sys clock divider for SYS6_CLK (133 Mhz) */
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writel(MC_CGM_SC_DCn_DE | MC_CGM_SC_DCn_PREDIV(0x1),
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CGM_SC_DCn(MC_CGM0_BASE_ADDR, 1));
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entry_to_target_mode(MC_ME_MCTL_RUN0);
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}
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static void setup_aux_clocks(void)
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{
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/*
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* setup the aux clock divider for PERI_CLK
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* (source: PERIPH_PLL_PHI_0/5, PERI_CLK - 80 MHz)
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*/
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aux_source_clk_config(MC_CGM0_BASE_ADDR, 5, MC_CGM_ACn_SEL_PERPLLDIVX);
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aux_div_clk_config(MC_CGM0_BASE_ADDR, 5, 0, 4);
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/* setup the aux clock divider for LIN_CLK (40MHz) */
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aux_source_clk_config(MC_CGM0_BASE_ADDR, 3, MC_CGM_ACn_SEL_PERPLLDIVX);
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aux_div_clk_config(MC_CGM0_BASE_ADDR, 3, 0, 1);
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/* setup the aux clock divider for ENET_TIME_CLK (50MHz) */
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aux_source_clk_config(MC_CGM0_BASE_ADDR, 7, MC_CGM_ACn_SEL_ENETPLL);
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aux_div_clk_config(MC_CGM0_BASE_ADDR, 7, 1, 9);
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/* setup the aux clock divider for ENET_CLK (50MHz) */
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aux_source_clk_config(MC_CGM2_BASE_ADDR, 2, MC_CGM_ACn_SEL_ENETPLL);
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aux_div_clk_config(MC_CGM2_BASE_ADDR, 2, 0, 9);
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/* setup the aux clock divider for SDHC_CLK (50 MHz). */
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aux_source_clk_config(MC_CGM0_BASE_ADDR, 15, MC_CGM_ACn_SEL_ENETPLL);
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aux_div_clk_config(MC_CGM0_BASE_ADDR, 15, 0, 9);
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/* setup the aux clock divider for DDR_CLK (533MHz) and APEX_SYS_CLK (266MHz) */
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aux_source_clk_config(MC_CGM0_BASE_ADDR, 8, MC_CGM_ACn_SEL_DDRPLL);
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aux_div_clk_config(MC_CGM0_BASE_ADDR, 8, 0, 0);
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/* setup the aux clock divider for DDR4_CLK (133,25MHz) */
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aux_div_clk_config(MC_CGM0_BASE_ADDR, 8, 1, 3);
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entry_to_target_mode(MC_ME_MCTL_RUN0);
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}
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static void enable_modules_clock(void)
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{
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/* PIT0 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL58);
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/* PIT1 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL170);
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/* LINFLEX0 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL83);
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/* LINFLEX1 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL188);
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/* ENET */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL50);
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/* SDHC */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL93);
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/* IIC0 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL81);
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/* IIC1 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL184);
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/* IIC2 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL186);
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/* MMDC0 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL54);
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/* MMDC1 */
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writeb(MC_ME_PCTLn_RUNPCm(0), MC_ME_PCTL162);
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entry_to_target_mode(MC_ME_MCTL_RUN0);
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}
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void clock_init(void)
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{
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unsigned int arm_dfs[ARM_PLL_PHI1_DFS_Nr][DFS_PARAMS_Nr] = {
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{ARM_PLL_PHI1_DFS1_EN, ARM_PLL_PHI1_DFS1_MFN,
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ARM_PLL_PHI1_DFS1_MFI},
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{ARM_PLL_PHI1_DFS2_EN, ARM_PLL_PHI1_DFS2_MFN,
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ARM_PLL_PHI1_DFS2_MFI},
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{ARM_PLL_PHI1_DFS3_EN, ARM_PLL_PHI1_DFS3_MFN,
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ARM_PLL_PHI1_DFS3_MFI}
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};
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unsigned int enet_dfs[ENET_PLL_PHI1_DFS_Nr][DFS_PARAMS_Nr] = {
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{ENET_PLL_PHI1_DFS1_EN, ENET_PLL_PHI1_DFS1_MFN,
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ENET_PLL_PHI1_DFS1_MFI},
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{ENET_PLL_PHI1_DFS2_EN, ENET_PLL_PHI1_DFS2_MFN,
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ENET_PLL_PHI1_DFS2_MFI},
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{ENET_PLL_PHI1_DFS3_EN, ENET_PLL_PHI1_DFS3_MFN,
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ENET_PLL_PHI1_DFS3_MFI},
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{ENET_PLL_PHI1_DFS4_EN, ENET_PLL_PHI1_DFS4_MFN,
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ENET_PLL_PHI1_DFS4_MFI}
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};
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unsigned int ddr_dfs[DDR_PLL_PHI1_DFS_Nr][DFS_PARAMS_Nr] = {
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{DDR_PLL_PHI1_DFS1_EN, DDR_PLL_PHI1_DFS1_MFN,
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DDR_PLL_PHI1_DFS1_MFI},
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{DDR_PLL_PHI1_DFS2_EN, DDR_PLL_PHI1_DFS2_MFN,
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DDR_PLL_PHI1_DFS2_MFI},
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{DDR_PLL_PHI1_DFS3_EN, DDR_PLL_PHI1_DFS3_MFN,
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DDR_PLL_PHI1_DFS3_MFI}
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};
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writel(MC_ME_RUN_PCn_DRUN | MC_ME_RUN_PCn_RUN0 | MC_ME_RUN_PCn_RUN1 |
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MC_ME_RUN_PCn_RUN2 | MC_ME_RUN_PCn_RUN3, MC_ME_RUN_PCn(0));
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/* turn on FXOSC */
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writel(MC_ME_RUNMODE_MC_MVRON | MC_ME_RUNMODE_MC_XOSCON |
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MC_ME_RUNMODE_MC_FIRCON | MC_ME_RUNMODE_MC_SYSCLK(0x1),
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MC_ME_RUNn_MC(0));
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entry_to_target_mode(MC_ME_MCTL_RUN0);
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program_pll(ARM_PLL, XOSC_CLK_FREQ, ARM_PLL_PHI0_FREQ,
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ARM_PLL_PHI1_FREQ, ARM_PLL_PHI1_DFS_Nr, arm_dfs,
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ARM_PLL_PLLDV_PREDIV, ARM_PLL_PLLDV_MFD, ARM_PLL_PLLDV_MFN);
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setup_sys_clocks();
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program_pll(PERIPH_PLL, XOSC_CLK_FREQ, PERIPH_PLL_PHI0_FREQ,
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PERIPH_PLL_PHI1_FREQ, PERIPH_PLL_PHI1_DFS_Nr, NULL,
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PERIPH_PLL_PLLDV_PREDIV, PERIPH_PLL_PLLDV_MFD,
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PERIPH_PLL_PLLDV_MFN);
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program_pll(ENET_PLL, XOSC_CLK_FREQ, ENET_PLL_PHI0_FREQ,
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ENET_PLL_PHI1_FREQ, ENET_PLL_PHI1_DFS_Nr, enet_dfs,
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ENET_PLL_PLLDV_PREDIV, ENET_PLL_PLLDV_MFD,
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ENET_PLL_PLLDV_MFN);
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program_pll(DDR_PLL, XOSC_CLK_FREQ, DDR_PLL_PHI0_FREQ,
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DDR_PLL_PHI1_FREQ, DDR_PLL_PHI1_DFS_Nr, ddr_dfs,
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DDR_PLL_PLLDV_PREDIV, DDR_PLL_PLLDV_MFD, DDR_PLL_PLLDV_MFN);
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program_pll(VIDEO_PLL, XOSC_CLK_FREQ, VIDEO_PLL_PHI0_FREQ,
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VIDEO_PLL_PHI1_FREQ, VIDEO_PLL_PHI1_DFS_Nr, NULL,
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VIDEO_PLL_PLLDV_PREDIV, VIDEO_PLL_PLLDV_MFD,
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VIDEO_PLL_PLLDV_MFN);
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setup_aux_clocks();
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enable_modules_clock();
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}
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