| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright 2017-2020 NXP |
| * Copyright 2014-2015 Freescale Semiconductor, Inc. |
| * Layerscape PCIe driver |
| */ |
| |
| #include <log.h> |
| #include <asm/global_data.h> |
| #include <asm/io.h> |
| #include <errno.h> |
| #include <malloc.h> |
| #if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \ |
| defined(CONFIG_ARM) |
| #include <asm/arch/clock.h> |
| #endif |
| #include "pcie_layerscape.h" |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| LIST_HEAD(ls_pcie_list); |
| |
| unsigned int dbi_readl(struct ls_pcie *pcie, unsigned int offset) |
| { |
| return in_le32(pcie->dbi + offset); |
| } |
| |
| void dbi_writel(struct ls_pcie *pcie, unsigned int value, unsigned int offset) |
| { |
| out_le32(pcie->dbi + offset, value); |
| } |
| |
| unsigned int ctrl_readl(struct ls_pcie *pcie, unsigned int offset) |
| { |
| if (pcie->big_endian) |
| return in_be32(pcie->ctrl + offset); |
| else |
| return in_le32(pcie->ctrl + offset); |
| } |
| |
| void ctrl_writel(struct ls_pcie *pcie, unsigned int value, |
| unsigned int offset) |
| { |
| if (pcie->big_endian) |
| out_be32(pcie->ctrl + offset, value); |
| else |
| out_le32(pcie->ctrl + offset, value); |
| } |
| |
| void ls_pcie_dbi_ro_wr_en(struct ls_pcie *pcie) |
| { |
| u32 reg, val; |
| |
| reg = PCIE_MISC_CONTROL_1_OFF; |
| val = dbi_readl(pcie, reg); |
| val |= PCIE_DBI_RO_WR_EN; |
| dbi_writel(pcie, val, reg); |
| } |
| |
| void ls_pcie_dbi_ro_wr_dis(struct ls_pcie *pcie) |
| { |
| u32 reg, val; |
| |
| reg = PCIE_MISC_CONTROL_1_OFF; |
| val = dbi_readl(pcie, reg); |
| val &= ~PCIE_DBI_RO_WR_EN; |
| dbi_writel(pcie, val, reg); |
| } |
| |
| static int ls_pcie_ltssm(struct ls_pcie *pcie) |
| { |
| u32 state; |
| uint svr; |
| |
| svr = get_svr(); |
| if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { |
| state = ctrl_readl(pcie, LS1021_PEXMSCPORTSR(pcie->idx)); |
| state = (state >> LS1021_LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK; |
| } else { |
| state = ctrl_readl(pcie, PCIE_PF_DBG) & LTSSM_STATE_MASK; |
| } |
| |
| return state; |
| } |
| |
| int ls_pcie_link_up(struct ls_pcie *pcie) |
| { |
| int ltssm; |
| |
| ltssm = ls_pcie_ltssm(pcie); |
| if (ltssm < LTSSM_PCIE_L0) |
| return 0; |
| |
| return 1; |
| } |
| |
| void ls_pcie_atu_outbound_set(struct ls_pcie *pcie, int idx, int type, |
| u64 phys, u64 bus_addr, u64 size) |
| { |
| dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | idx, PCIE_ATU_VIEWPORT); |
| dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_BASE); |
| dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_BASE); |
| dbi_writel(pcie, (u32)phys + size - 1, PCIE_ATU_LIMIT); |
| dbi_writel(pcie, (u32)bus_addr, PCIE_ATU_LOWER_TARGET); |
| dbi_writel(pcie, bus_addr >> 32, PCIE_ATU_UPPER_TARGET); |
| dbi_writel(pcie, type, PCIE_ATU_CR1); |
| dbi_writel(pcie, PCIE_ATU_ENABLE, PCIE_ATU_CR2); |
| } |
| |
| /* Use bar match mode and MEM type as default */ |
| void ls_pcie_atu_inbound_set(struct ls_pcie *pcie, u32 pf, u32 vf_flag, |
| int type, int idx, int bar, u64 phys) |
| { |
| dbi_writel(pcie, PCIE_ATU_REGION_INBOUND | idx, PCIE_ATU_VIEWPORT); |
| dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_TARGET); |
| dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_TARGET); |
| dbi_writel(pcie, type | PCIE_ATU_FUNC_NUM(pf), PCIE_ATU_CR1); |
| dbi_writel(pcie, PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE | |
| (vf_flag ? PCIE_ATU_FUNC_NUM_MATCH_EN : 0) | |
| (vf_flag ? PCIE_ATU_VFBAR_MATCH_MODE_EN : 0) | |
| PCIE_ATU_BAR_NUM(bar), PCIE_ATU_CR2); |
| } |
| |
| void ls_pcie_dump_atu(struct ls_pcie *pcie, u32 win_num, u32 type) |
| { |
| int win_idx; |
| |
| for (win_idx = 0; win_idx < win_num; win_idx++) { |
| dbi_writel(pcie, type | win_idx, PCIE_ATU_VIEWPORT); |
| debug("iATU%d:\n", win_idx); |
| debug("\tLOWER PHYS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_LOWER_BASE)); |
| debug("\tUPPER PHYS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_UPPER_BASE)); |
| if (type == PCIE_ATU_REGION_OUTBOUND) { |
| debug("\tLOWER BUS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_LOWER_TARGET)); |
| debug("\tUPPER BUS 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_UPPER_TARGET)); |
| debug("\tLIMIT 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_LIMIT)); |
| } |
| debug("\tCR1 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_CR1)); |
| debug("\tCR2 0x%08x\n", |
| dbi_readl(pcie, PCIE_ATU_CR2)); |
| } |
| } |