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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2018-2019 NXP
*
* PCIe Gen4 driver for NXP Layerscape SoCs
* Author: Hou Zhiqiang <Minder.Hou@gmail.com>
*/
#ifndef _PCIE_LAYERSCAPE_GEN4_H_
#define _PCIE_LAYERSCAPE_GEN4_H_
#include <pci.h>
#include <linux/bitops.h>
#ifndef CONFIG_SYS_PCI_MEMORY_SIZE
#define CONFIG_SYS_PCI_MEMORY_SIZE (4 * 1024 * 1024 * 1024ULL)
#endif
#ifndef CONFIG_SYS_PCI_EP_MEMORY_BASE
#define CONFIG_SYS_PCI_EP_MEMORY_BASE CONFIG_SYS_LOAD_ADDR
#endif
#define PCIE_PF_NUM 2
#define PCIE_VF_NUM 32
#define LS_G4_PF0 0
#define LS_G4_PF1 1
#define PF_BAR_NUM 4
#define VF_BAR_NUM 4
#define PCIE_BAR_SIZE (8 * 1024) /* 8K */
#define PCIE_BAR0_SIZE PCIE_BAR_SIZE
#define PCIE_BAR1_SIZE PCIE_BAR_SIZE
#define PCIE_BAR2_SIZE PCIE_BAR_SIZE
#define PCIE_BAR4_SIZE PCIE_BAR_SIZE
#define SIZE_1T (1024 * 1024 * 1024 * 1024ULL)
/* GPEX CSR */
#define GPEX_CLASSCODE 0x474
#define GPEX_CLASSCODE_SHIFT 16
#define GPEX_CLASSCODE_MASK 0xffff
#define GPEX_CFG_READY 0x4b0
#define PCIE_CONFIG_READY BIT(0)
#define GPEX_BAR_ENABLE 0x4d4
#define GPEX_BAR_SIZE_LDW 0x4d8
#define GPEX_BAR_SIZE_UDW 0x4dC
#define GPEX_BAR_SELECT 0x4e0
#define BAR_POS(bar, pf, vf_bar) \
((bar) + (pf) * PF_BAR_NUM + (vf_bar) * PCIE_PF_NUM * PF_BAR_NUM)
#define GPEX_SRIOV_INIT_VFS_TOTAL_VF(pf) (0x644 + (pf) * 4)
#define TTL_VF_MASK 0xffff
#define TTL_VF_SHIFT 16
#define INI_VF_MASK 0xffff
#define INI_VF_SHIFT 0
#define GPEX_SRIOV_VF_OFFSET_STRIDE(pf) (0x704 + (pf) * 4)
/* PAB CSR */
#define PAB_CTRL 0x808
#define PAB_CTRL_APIO_EN BIT(0)
#define PAB_CTRL_PPIO_EN BIT(1)
#define PAB_CTRL_MAX_BRST_LEN_SHIFT 4
#define PAB_CTRL_MAX_BRST_LEN_MASK 0x3
#define PAB_CTRL_PAGE_SEL_SHIFT 13
#define PAB_CTRL_PAGE_SEL_MASK 0x3f
#define PAB_CTRL_FUNC_SEL_SHIFT 19
#define PAB_CTRL_FUNC_SEL_MASK 0x1ff
#define PAB_RST_CTRL 0x820
#define PAB_BR_STAT 0x80c
/* AXI PIO Engines */
#define PAB_AXI_PIO_CTRL(idx) (0x840 + 0x10 * (idx))
#define APIO_EN BIT(0)
#define MEM_WIN_EN BIT(1)
#define IO_WIN_EN BIT(2)
#define CFG_WIN_EN BIT(3)
#define PAB_AXI_PIO_STAT(idx) (0x844 + 0x10 * (idx))
#define PAB_AXI_PIO_SL_CMD_STAT(idx) (0x848 + 0x10 * (idx))
#define PAB_AXI_PIO_SL_ADDR_STAT(idx) (0x84c + 0x10 * (idx))
#define PAB_AXI_PIO_SL_EXT_ADDR_STAT(idx) (0xb8a0 + 0x4 * (idx))
/* PEX PIO Engines */
#define PAB_PEX_PIO_CTRL(idx) (0x8c0 + 0x10 * (idx))
#define PPIO_EN BIT(0)
#define PAB_PEX_PIO_STAT(idx) (0x8c4 + 0x10 * (idx))
#define PAB_PEX_PIO_MT_STAT(idx) (0x8c8 + 0x10 * (idx))
#define INDIRECT_ADDR_BNDRY 0xc00
#define PAGE_IDX_SHIFT 10
#define PAGE_ADDR_MASK 0x3ff
#define OFFSET_TO_PAGE_IDX(off) \
(((off) >> PAGE_IDX_SHIFT) & PAB_CTRL_PAGE_SEL_MASK)
#define OFFSET_TO_PAGE_ADDR(off) \
(((off) & PAGE_ADDR_MASK) | INDIRECT_ADDR_BNDRY)
/* APIO WINs */
#define PAB_AXI_AMAP_CTRL(idx) (0xba0 + 0x10 * (idx))
#define PAB_EXT_AXI_AMAP_SIZE(idx) (0xbaf0 + 0x4 * (idx))
#define PAB_AXI_AMAP_AXI_WIN(idx) (0xba4 + 0x10 * (idx))
#define PAB_EXT_AXI_AMAP_AXI_WIN(idx) (0x80a0 + 0x4 * (idx))
#define PAB_AXI_AMAP_PEX_WIN_L(idx) (0xba8 + 0x10 * (idx))
#define PAB_AXI_AMAP_PEX_WIN_H(idx) (0xbac + 0x10 * (idx))
#define PAB_AXI_AMAP_PCI_HDR_PARAM(idx) (0x5ba0 + 0x4 * (idx))
#define FUNC_NUM_PCIE_MASK GENMASK(7, 0)
#define AXI_AMAP_CTRL_EN BIT(0)
#define AXI_AMAP_CTRL_TYPE_SHIFT 1
#define AXI_AMAP_CTRL_TYPE_MASK 0x3
#define AXI_AMAP_CTRL_SIZE_SHIFT 10
#define AXI_AMAP_CTRL_SIZE_MASK 0x3fffff
#define PAB_TARGET_BUS(x) (((x) & 0xff) << 24)
#define PAB_TARGET_DEV(x) (((x) & 0x1f) << 19)
#define PAB_TARGET_FUNC(x) (((x) & 0x7) << 16)
#define PAB_AXI_TYPE_CFG 0x00
#define PAB_AXI_TYPE_IO 0x01
#define PAB_AXI_TYPE_MEM 0x02
#define PAB_AXI_TYPE_ATOM 0x03
#define PAB_WINS_NUM 256
/* PPIO WINs RC mode */
#define PAB_PEX_AMAP_CTRL(idx) (0x4ba0 + 0x10 * (idx))
#define PAB_EXT_PEX_AMAP_SIZE(idx) (0xbef0 + 0x04 * (idx))
#define PAB_PEX_AMAP_AXI_WIN(idx) (0x4ba4 + 0x10 * (idx))
#define PAB_EXT_PEX_AMAP_AXI_WIN(idx) (0xb4a0 + 0x04 * (idx))
#define PAB_PEX_AMAP_PEX_WIN_L(idx) (0x4ba8 + 0x10 * (idx))
#define PAB_PEX_AMAP_PEX_WIN_H(idx) (0x4bac + 0x10 * (idx))
#define IB_TYPE_MEM_F 0x2
#define IB_TYPE_MEM_NF 0x3
#define PEX_AMAP_CTRL_TYPE_SHIFT 0x1
#define PEX_AMAP_CTRL_EN_SHIFT 0x0
#define PEX_AMAP_CTRL_TYPE_MASK 0x3
#define PEX_AMAP_CTRL_EN_MASK 0x1
/* PPIO WINs EP mode */
#define PAB_PEX_BAR_AMAP(pf, bar) \
(0x1ba0 + 0x20 * (pf) + 4 * (bar))
#define BAR_AMAP_EN BIT(0)
#define PAB_EXT_PEX_BAR_AMAP(pf, bar) \
(0x84a0 + 0x20 * (pf) + 4 * (bar))
/* CCSR registers */
#define PCIE_LINK_CTRL_STA 0x5c
#define PCIE_LINK_SPEED_SHIFT 16
#define PCIE_LINK_SPEED_MASK 0x0f
#define PCIE_LINK_WIDTH_SHIFT 20
#define PCIE_LINK_WIDTH_MASK 0x3f
#define PCIE_SRIOV_CAPABILITY 0x2a0
#define PCIE_SRIOV_VF_OFFSET_STRIDE 0x2b4
/* LUT registers */
#define PCIE_LUT_UDR(n) (0x800 + (n) * 8)
#define PCIE_LUT_LDR(n) (0x804 + (n) * 8)
#define PCIE_LUT_ENABLE BIT(31)
#define PCIE_LUT_ENTRY_COUNT 32
/* PF control registers */
#define PCIE_LTSSM_STA 0x7fc
#define LTSSM_STATE_MASK 0x7f
#define LTSSM_PCIE_L0 0x2d /* L0 state */
#define PCIE_SRDS_PRTCL(idx) (PCIE1 + (idx))
#define PCIE_SYS_BASE_ADDR 0x3400000
#define PCIE_CCSR_SIZE 0x0100000
struct ls_pcie_g4 {
int idx;
struct list_head list;
struct udevice *bus;
struct fdt_resource ccsr_res;
struct fdt_resource cfg_res;
struct fdt_resource lut_res;
struct fdt_resource pf_ctrl_res;
void __iomem *ccsr;
void __iomem *cfg;
void __iomem *lut;
void __iomem *pf_ctrl;
bool big_endian;
bool enabled;
int next_lut_index;
struct pci_controller hose;
int stream_id_cur;
int mode;
int sriov_support;
};
extern struct list_head ls_pcie_g4_list;
static inline void lut_writel(struct ls_pcie_g4 *pcie, unsigned int value,
unsigned int offset)
{
if (pcie->big_endian)
out_be32(pcie->lut + offset, value);
else
out_le32(pcie->lut + offset, value);
}
static inline u32 lut_readl(struct ls_pcie_g4 *pcie, unsigned int offset)
{
if (pcie->big_endian)
return in_be32(pcie->lut + offset);
else
return in_le32(pcie->lut + offset);
}
static inline void ccsr_set_page(struct ls_pcie_g4 *pcie, u8 pg_idx)
{
u32 val;
val = in_le32(pcie->ccsr + PAB_CTRL);
val &= ~(PAB_CTRL_PAGE_SEL_MASK << PAB_CTRL_PAGE_SEL_SHIFT);
val |= (pg_idx & PAB_CTRL_PAGE_SEL_MASK) << PAB_CTRL_PAGE_SEL_SHIFT;
out_le32(pcie->ccsr + PAB_CTRL, val);
}
static inline unsigned int ccsr_readl(struct ls_pcie_g4 *pcie, u32 offset)
{
if (offset < INDIRECT_ADDR_BNDRY) {
ccsr_set_page(pcie, 0);
return in_le32(pcie->ccsr + offset);
}
ccsr_set_page(pcie, OFFSET_TO_PAGE_IDX(offset));
return in_le32(pcie->ccsr + OFFSET_TO_PAGE_ADDR(offset));
}
static inline void ccsr_writel(struct ls_pcie_g4 *pcie, u32 offset, u32 value)
{
if (offset < INDIRECT_ADDR_BNDRY) {
ccsr_set_page(pcie, 0);
out_le32(pcie->ccsr + offset, value);
} else {
ccsr_set_page(pcie, OFFSET_TO_PAGE_IDX(offset));
out_le32(pcie->ccsr + OFFSET_TO_PAGE_ADDR(offset), value);
}
}
static inline unsigned int pf_ctrl_readl(struct ls_pcie_g4 *pcie, u32 offset)
{
if (pcie->big_endian)
return in_be32(pcie->pf_ctrl + offset);
else
return in_le32(pcie->pf_ctrl + offset);
}
static inline void pf_ctrl_writel(struct ls_pcie_g4 *pcie, u32 offset,
u32 value)
{
if (pcie->big_endian)
out_be32(pcie->pf_ctrl + offset, value);
else
out_le32(pcie->pf_ctrl + offset, value);
}
#endif /* _PCIE_LAYERSCAPE_GEN4_H_ */
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