411 lines
13 KiB
C
411 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Sun6i platform dram controller init.
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*
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* (C) Copyright 2007-2012
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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* Berg Xing <bergxing@allwinnertech.com>
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* Tom Cubie <tangliang@allwinnertech.com>
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*
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* (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
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*/
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#include <common.h>
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#include <errno.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/dram.h>
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#include <asm/arch/prcm.h>
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#define DRAM_CLK (CONFIG_DRAM_CLK * 1000000)
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struct dram_sun6i_para {
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u8 bus_width;
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u8 chan;
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u8 rank;
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u8 rows;
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u16 page_size;
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};
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static void mctl_sys_init(void)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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const int dram_clk_div = 2;
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clock_set_pll5(DRAM_CLK * dram_clk_div, false);
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clrsetbits_le32(&ccm->dram_clk_cfg, CCM_DRAMCLK_CFG_DIV0_MASK,
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CCM_DRAMCLK_CFG_DIV0(dram_clk_div) | CCM_DRAMCLK_CFG_RST |
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CCM_DRAMCLK_CFG_UPD);
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mctl_await_completion(&ccm->dram_clk_cfg, CCM_DRAMCLK_CFG_UPD, 0);
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writel(MDFS_CLK_DEFAULT, &ccm->mdfs_clk_cfg);
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/* deassert mctl reset */
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setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MCTL);
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/* enable mctl clock */
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setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MCTL);
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}
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static void mctl_dll_init(int ch_index, struct dram_sun6i_para *para)
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{
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struct sunxi_mctl_phy_reg *mctl_phy;
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if (ch_index == 0)
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mctl_phy = (struct sunxi_mctl_phy_reg *)SUNXI_DRAM_PHY0_BASE;
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else
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mctl_phy = (struct sunxi_mctl_phy_reg *)SUNXI_DRAM_PHY1_BASE;
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/* disable + reset dlls */
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writel(MCTL_DLLCR_DISABLE, &mctl_phy->acdllcr);
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writel(MCTL_DLLCR_DISABLE, &mctl_phy->dx0dllcr);
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writel(MCTL_DLLCR_DISABLE, &mctl_phy->dx1dllcr);
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if (para->bus_width == 32) {
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writel(MCTL_DLLCR_DISABLE, &mctl_phy->dx2dllcr);
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writel(MCTL_DLLCR_DISABLE, &mctl_phy->dx3dllcr);
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}
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udelay(2);
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/* enable + reset dlls */
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writel(0, &mctl_phy->acdllcr);
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writel(0, &mctl_phy->dx0dllcr);
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writel(0, &mctl_phy->dx1dllcr);
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if (para->bus_width == 32) {
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writel(0, &mctl_phy->dx2dllcr);
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writel(0, &mctl_phy->dx3dllcr);
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}
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udelay(22);
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/* enable and release reset of dlls */
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writel(MCTL_DLLCR_NRESET, &mctl_phy->acdllcr);
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writel(MCTL_DLLCR_NRESET, &mctl_phy->dx0dllcr);
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writel(MCTL_DLLCR_NRESET, &mctl_phy->dx1dllcr);
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if (para->bus_width == 32) {
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writel(MCTL_DLLCR_NRESET, &mctl_phy->dx2dllcr);
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writel(MCTL_DLLCR_NRESET, &mctl_phy->dx3dllcr);
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}
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udelay(22);
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}
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static bool mctl_rank_detect(u32 *gsr0, int rank)
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{
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const u32 done = MCTL_DX_GSR0_RANK0_TRAIN_DONE << rank;
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const u32 err = MCTL_DX_GSR0_RANK0_TRAIN_ERR << rank;
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mctl_await_completion(gsr0, done, done);
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mctl_await_completion(gsr0 + 0x10, done, done);
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return !(readl(gsr0) & err) && !(readl(gsr0 + 0x10) & err);
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}
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static void mctl_channel_init(int ch_index, struct dram_sun6i_para *para)
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{
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struct sunxi_mctl_com_reg * const mctl_com =
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(struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
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struct sunxi_mctl_ctl_reg *mctl_ctl;
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struct sunxi_mctl_phy_reg *mctl_phy;
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if (ch_index == 0) {
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mctl_ctl = (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
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mctl_phy = (struct sunxi_mctl_phy_reg *)SUNXI_DRAM_PHY0_BASE;
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} else {
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mctl_ctl = (struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL1_BASE;
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mctl_phy = (struct sunxi_mctl_phy_reg *)SUNXI_DRAM_PHY1_BASE;
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}
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writel(MCTL_MCMD_NOP, &mctl_ctl->mcmd);
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mctl_await_completion(&mctl_ctl->mcmd, MCTL_MCMD_BUSY, 0);
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/* PHY initialization */
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writel(MCTL_PGCR, &mctl_phy->pgcr);
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writel(MCTL_MR0, &mctl_phy->mr0);
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writel(MCTL_MR1, &mctl_phy->mr1);
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writel(MCTL_MR2, &mctl_phy->mr2);
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writel(MCTL_MR3, &mctl_phy->mr3);
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writel((MCTL_TITMSRST << 18) | (MCTL_TDLLLOCK << 6) | MCTL_TDLLSRST,
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&mctl_phy->ptr0);
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writel((MCTL_TDINIT1 << 19) | MCTL_TDINIT0, &mctl_phy->ptr1);
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writel((MCTL_TDINIT3 << 17) | MCTL_TDINIT2, &mctl_phy->ptr2);
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writel((MCTL_TCCD << 31) | (MCTL_TRC << 25) | (MCTL_TRRD << 21) |
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(MCTL_TRAS << 16) | (MCTL_TRCD << 12) | (MCTL_TRP << 8) |
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(MCTL_TWTR << 5) | (MCTL_TRTP << 2) | (MCTL_TMRD << 0),
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&mctl_phy->dtpr0);
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writel((MCTL_TDQSCKMAX << 27) | (MCTL_TDQSCK << 24) |
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(MCTL_TRFC << 16) | (MCTL_TRTODT << 11) |
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((MCTL_TMOD - 12) << 9) | (MCTL_TFAW << 3) | (0 << 2) |
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(MCTL_TAOND << 0), &mctl_phy->dtpr1);
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writel((MCTL_TDLLK << 19) | (MCTL_TCKE << 15) | (MCTL_TXPDLL << 10) |
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(MCTL_TEXSR << 0), &mctl_phy->dtpr2);
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writel(1, &mctl_ctl->dfitphyupdtype0);
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writel(MCTL_DCR_DDR3, &mctl_phy->dcr);
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writel(MCTL_DSGCR, &mctl_phy->dsgcr);
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writel(MCTL_DXCCR, &mctl_phy->dxccr);
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writel(MCTL_DX_GCR | MCTL_DX_GCR_EN, &mctl_phy->dx0gcr);
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writel(MCTL_DX_GCR | MCTL_DX_GCR_EN, &mctl_phy->dx1gcr);
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writel(MCTL_DX_GCR | MCTL_DX_GCR_EN, &mctl_phy->dx2gcr);
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writel(MCTL_DX_GCR | MCTL_DX_GCR_EN, &mctl_phy->dx3gcr);
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mctl_await_completion(&mctl_phy->pgsr, 0x03, 0x03);
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writel(CONFIG_DRAM_ZQ, &mctl_phy->zq0cr1);
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setbits_le32(&mctl_phy->pir, MCTL_PIR_CLEAR_STATUS);
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writel(MCTL_PIR_STEP1, &mctl_phy->pir);
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udelay(10);
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mctl_await_completion(&mctl_phy->pgsr, 0x1f, 0x1f);
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/* rank detect */
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if (!mctl_rank_detect(&mctl_phy->dx0gsr0, 1)) {
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para->rank = 1;
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clrbits_le32(&mctl_phy->pgcr, MCTL_PGCR_RANK);
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}
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/*
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* channel detect, check channel 1 dx0 and dx1 have rank 0, if not
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* assume nothing is connected to channel 1.
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*/
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if (ch_index == 1 && !mctl_rank_detect(&mctl_phy->dx0gsr0, 0)) {
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para->chan = 1;
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clrbits_le32(&mctl_com->ccr, MCTL_CCR_CH1_CLK_EN);
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return;
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}
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/* bus width detect, if dx2 and dx3 don't have rank 0, assume 16 bit */
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if (!mctl_rank_detect(&mctl_phy->dx2gsr0, 0)) {
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para->bus_width = 16;
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para->page_size = 2048;
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setbits_le32(&mctl_phy->dx2dllcr, MCTL_DLLCR_DISABLE);
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setbits_le32(&mctl_phy->dx3dllcr, MCTL_DLLCR_DISABLE);
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clrbits_le32(&mctl_phy->dx2gcr, MCTL_DX_GCR_EN);
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clrbits_le32(&mctl_phy->dx3gcr, MCTL_DX_GCR_EN);
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}
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setbits_le32(&mctl_phy->pir, MCTL_PIR_CLEAR_STATUS);
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writel(MCTL_PIR_STEP2, &mctl_phy->pir);
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udelay(10);
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mctl_await_completion(&mctl_phy->pgsr, 0x11, 0x11);
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if (readl(&mctl_phy->pgsr) & MCTL_PGSR_TRAIN_ERR_MASK)
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panic("Training error initialising DRAM\n");
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/* Move to configure state */
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writel(MCTL_SCTL_CONFIG, &mctl_ctl->sctl);
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mctl_await_completion(&mctl_ctl->sstat, 0x07, 0x01);
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/* Set number of clks per micro-second */
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writel(DRAM_CLK / 1000000, &mctl_ctl->togcnt1u);
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/* Set number of clks per 100 nano-seconds */
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writel(DRAM_CLK / 10000000, &mctl_ctl->togcnt100n);
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/* Set memory timing registers */
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writel(MCTL_TREFI, &mctl_ctl->trefi);
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writel(MCTL_TMRD, &mctl_ctl->tmrd);
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writel(MCTL_TRFC, &mctl_ctl->trfc);
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writel((MCTL_TPREA << 16) | MCTL_TRP, &mctl_ctl->trp);
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writel(MCTL_TRTW, &mctl_ctl->trtw);
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writel(MCTL_TAL, &mctl_ctl->tal);
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writel(MCTL_TCL, &mctl_ctl->tcl);
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writel(MCTL_TCWL, &mctl_ctl->tcwl);
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writel(MCTL_TRAS, &mctl_ctl->tras);
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writel(MCTL_TRC, &mctl_ctl->trc);
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writel(MCTL_TRCD, &mctl_ctl->trcd);
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writel(MCTL_TRRD, &mctl_ctl->trrd);
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writel(MCTL_TRTP, &mctl_ctl->trtp);
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writel(MCTL_TWR, &mctl_ctl->twr);
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writel(MCTL_TWTR, &mctl_ctl->twtr);
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writel(MCTL_TEXSR, &mctl_ctl->texsr);
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writel(MCTL_TXP, &mctl_ctl->txp);
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writel(MCTL_TXPDLL, &mctl_ctl->txpdll);
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writel(MCTL_TZQCS, &mctl_ctl->tzqcs);
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writel(MCTL_TZQCSI, &mctl_ctl->tzqcsi);
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writel(MCTL_TDQS, &mctl_ctl->tdqs);
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writel(MCTL_TCKSRE, &mctl_ctl->tcksre);
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writel(MCTL_TCKSRX, &mctl_ctl->tcksrx);
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writel(MCTL_TCKE, &mctl_ctl->tcke);
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writel(MCTL_TMOD, &mctl_ctl->tmod);
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writel(MCTL_TRSTL, &mctl_ctl->trstl);
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writel(MCTL_TZQCL, &mctl_ctl->tzqcl);
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writel(MCTL_TMRR, &mctl_ctl->tmrr);
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writel(MCTL_TCKESR, &mctl_ctl->tckesr);
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writel(MCTL_TDPD, &mctl_ctl->tdpd);
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/* Unknown magic performed by boot0 */
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setbits_le32(&mctl_ctl->dfiodtcfg, 1 << 3);
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clrbits_le32(&mctl_ctl->dfiodtcfg1, 0x1f);
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/* Select 16/32-bits mode for MCTL */
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if (para->bus_width == 16)
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setbits_le32(&mctl_ctl->ppcfg, 1);
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/* Set DFI timing registers */
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writel(MCTL_TCWL, &mctl_ctl->dfitphywrl);
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writel(MCTL_TCL - 1, &mctl_ctl->dfitrdden);
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writel(MCTL_DFITPHYRDL, &mctl_ctl->dfitphyrdl);
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writel(MCTL_DFISTCFG0, &mctl_ctl->dfistcfg0);
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writel(MCTL_MCFG_DDR3, &mctl_ctl->mcfg);
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/* DFI update configuration register */
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writel(MCTL_DFIUPDCFG_UPD, &mctl_ctl->dfiupdcfg);
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/* Move to access state */
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writel(MCTL_SCTL_ACCESS, &mctl_ctl->sctl);
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mctl_await_completion(&mctl_ctl->sstat, 0x07, 0x03);
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}
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static void mctl_com_init(struct dram_sun6i_para *para)
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{
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struct sunxi_mctl_com_reg * const mctl_com =
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(struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
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struct sunxi_mctl_phy_reg * const mctl_phy1 =
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(struct sunxi_mctl_phy_reg *)SUNXI_DRAM_PHY1_BASE;
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struct sunxi_prcm_reg * const prcm =
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(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
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writel(MCTL_CR_UNKNOWN | MCTL_CR_CHANNEL(para->chan) | MCTL_CR_DDR3 |
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((para->bus_width == 32) ? MCTL_CR_BUSW32 : MCTL_CR_BUSW16) |
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MCTL_CR_PAGE_SIZE(para->page_size) | MCTL_CR_ROW(para->rows) |
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MCTL_CR_BANK(1) | MCTL_CR_RANK(para->rank), &mctl_com->cr);
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/* Unknown magic performed by boot0 */
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setbits_le32(&mctl_com->dbgcr, (1 << 6));
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if (para->chan == 1) {
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/* Shutdown channel 1 */
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setbits_le32(&mctl_phy1->aciocr, MCTL_ACIOCR_DISABLE);
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setbits_le32(&mctl_phy1->dxccr, MCTL_DXCCR_DISABLE);
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clrbits_le32(&mctl_phy1->dsgcr, MCTL_DSGCR_ENABLE);
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/*
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* CH0 ?? this is what boot0 does. Leave as is until we can
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* confirm this.
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*/
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setbits_le32(&prcm->vdd_sys_pwroff,
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PRCM_VDD_SYS_DRAM_CH0_PAD_HOLD_PWROFF);
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}
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}
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static void mctl_port_cfg(void)
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{
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struct sunxi_mctl_com_reg * const mctl_com =
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(struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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/* enable DRAM AXI clock for CPU access */
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setbits_le32(&ccm->axi_gate, 1 << AXI_GATE_OFFSET_DRAM);
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/* Bunch of magic writes performed by boot0 */
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writel(0x00400302, &mctl_com->rmcr[0]);
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writel(0x01000307, &mctl_com->rmcr[1]);
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writel(0x00400302, &mctl_com->rmcr[2]);
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writel(0x01000307, &mctl_com->rmcr[3]);
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writel(0x01000307, &mctl_com->rmcr[4]);
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writel(0x01000303, &mctl_com->rmcr[6]);
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writel(0x01000303, &mctl_com->mmcr[0]);
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writel(0x00400310, &mctl_com->mmcr[1]);
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writel(0x01000307, &mctl_com->mmcr[2]);
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writel(0x01000303, &mctl_com->mmcr[3]);
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writel(0x01800303, &mctl_com->mmcr[4]);
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writel(0x01800303, &mctl_com->mmcr[5]);
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writel(0x01800303, &mctl_com->mmcr[6]);
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writel(0x01800303, &mctl_com->mmcr[7]);
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writel(0x01000303, &mctl_com->mmcr[8]);
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writel(0x00000002, &mctl_com->mmcr[15]);
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writel(0x00000310, &mctl_com->mbagcr[0]);
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writel(0x00400310, &mctl_com->mbagcr[1]);
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writel(0x00400310, &mctl_com->mbagcr[2]);
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writel(0x00000307, &mctl_com->mbagcr[3]);
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writel(0x00000317, &mctl_com->mbagcr[4]);
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writel(0x00000307, &mctl_com->mbagcr[5]);
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}
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unsigned long sunxi_dram_init(void)
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{
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struct sunxi_mctl_com_reg * const mctl_com =
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(struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
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u32 offset;
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int bank, bus, columns;
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/* Set initial parameters, these get modified by the autodetect code */
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struct dram_sun6i_para para = {
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.bus_width = 32,
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.chan = 2,
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.rank = 2,
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.page_size = 4096,
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.rows = 16,
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};
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/* A31s only has one channel */
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if (sunxi_get_ss_bonding_id() == SUNXI_SS_BOND_ID_A31S)
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para.chan = 1;
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mctl_sys_init();
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mctl_dll_init(0, ¶);
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setbits_le32(&mctl_com->ccr, MCTL_CCR_CH0_CLK_EN);
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if (para.chan == 2) {
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mctl_dll_init(1, ¶);
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setbits_le32(&mctl_com->ccr, MCTL_CCR_CH1_CLK_EN);
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}
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setbits_le32(&mctl_com->ccr, MCTL_CCR_MASTER_CLK_EN);
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mctl_channel_init(0, ¶);
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if (para.chan == 2)
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mctl_channel_init(1, ¶);
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mctl_com_init(¶);
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mctl_port_cfg();
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/*
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* Change to 1 ch / sequence / 8192 byte pages / 16 rows /
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* 8 bit banks / 1 rank mode.
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*/
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clrsetbits_le32(&mctl_com->cr,
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MCTL_CR_CHANNEL_MASK | MCTL_CR_PAGE_SIZE_MASK |
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MCTL_CR_ROW_MASK | MCTL_CR_BANK_MASK | MCTL_CR_RANK_MASK,
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MCTL_CR_CHANNEL(1) | MCTL_CR_SEQUENCE |
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MCTL_CR_PAGE_SIZE(8192) | MCTL_CR_ROW(16) |
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MCTL_CR_BANK(1) | MCTL_CR_RANK(1));
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/* Detect and set page size */
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for (columns = 7; columns < 20; columns++) {
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if (mctl_mem_matches(1 << columns))
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break;
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}
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bus = (para.bus_width == 32) ? 2 : 1;
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columns -= bus;
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para.page_size = (1 << columns) * (bus << 1);
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clrsetbits_le32(&mctl_com->cr, MCTL_CR_PAGE_SIZE_MASK,
|
|
MCTL_CR_PAGE_SIZE(para.page_size));
|
|
|
|
/* Detect and set rows */
|
|
for (para.rows = 11; para.rows < 16; para.rows++) {
|
|
offset = 1 << (para.rows + columns + bus);
|
|
if (mctl_mem_matches(offset))
|
|
break;
|
|
}
|
|
clrsetbits_le32(&mctl_com->cr, MCTL_CR_ROW_MASK,
|
|
MCTL_CR_ROW(para.rows));
|
|
|
|
/* Detect bank size */
|
|
offset = 1 << (para.rows + columns + bus + 2);
|
|
bank = mctl_mem_matches(offset) ? 0 : 1;
|
|
|
|
/* Restore interleave, chan and rank values, set bank size */
|
|
clrsetbits_le32(&mctl_com->cr,
|
|
MCTL_CR_CHANNEL_MASK | MCTL_CR_SEQUENCE |
|
|
MCTL_CR_BANK_MASK | MCTL_CR_RANK_MASK,
|
|
MCTL_CR_CHANNEL(para.chan) | MCTL_CR_BANK(bank) |
|
|
MCTL_CR_RANK(para.rank));
|
|
|
|
return 1 << (para.rank + para.rows + bank + columns + para.chan + bus);
|
|
}
|