Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Synopsys Designware PCIe host controller driver |
| 3 | * |
| 4 | * Copyright (C) 2013 Samsung Electronics Co., Ltd. |
| 5 | * http://www.samsung.com |
| 6 | * |
| 7 | * Author: Jingoo Han <jg1.han@samsung.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
Seungwon Jeon | 18edf45 | 2013-10-09 09:12:21 -0600 | [diff] [blame] | 14 | #ifndef _PCIE_DESIGNWARE_H |
| 15 | #define _PCIE_DESIGNWARE_H |
| 16 | |
Kishon Vijay Abraham I | feb85d9 | 2017-02-15 18:48:17 +0530 | [diff] [blame] | 17 | #include <linux/irq.h> |
| 18 | #include <linux/msi.h> |
| 19 | #include <linux/pci.h> |
| 20 | |
Kishon Vijay Abraham I | b90dc39 | 2017-02-15 18:48:10 +0530 | [diff] [blame] | 21 | /* Parameters for the waiting for link up routine */ |
| 22 | #define LINK_WAIT_MAX_RETRIES 10 |
| 23 | #define LINK_WAIT_USLEEP_MIN 90000 |
| 24 | #define LINK_WAIT_USLEEP_MAX 100000 |
| 25 | |
| 26 | /* Parameters for the waiting for iATU enabled routine */ |
| 27 | #define LINK_WAIT_MAX_IATU_RETRIES 5 |
| 28 | #define LINK_WAIT_IATU_MIN 9000 |
| 29 | #define LINK_WAIT_IATU_MAX 10000 |
| 30 | |
| 31 | /* Synopsys-specific PCIe configuration registers */ |
| 32 | #define PCIE_PORT_LINK_CONTROL 0x710 |
| 33 | #define PORT_LINK_MODE_MASK (0x3f << 16) |
| 34 | #define PORT_LINK_MODE_1_LANES (0x1 << 16) |
| 35 | #define PORT_LINK_MODE_2_LANES (0x3 << 16) |
| 36 | #define PORT_LINK_MODE_4_LANES (0x7 << 16) |
| 37 | #define PORT_LINK_MODE_8_LANES (0xf << 16) |
| 38 | |
| 39 | #define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C |
| 40 | #define PORT_LOGIC_SPEED_CHANGE (0x1 << 17) |
| 41 | #define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8) |
| 42 | #define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8) |
| 43 | #define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8) |
| 44 | #define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8) |
| 45 | #define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8) |
| 46 | |
| 47 | #define PCIE_MSI_ADDR_LO 0x820 |
| 48 | #define PCIE_MSI_ADDR_HI 0x824 |
| 49 | #define PCIE_MSI_INTR0_ENABLE 0x828 |
| 50 | #define PCIE_MSI_INTR0_MASK 0x82C |
| 51 | #define PCIE_MSI_INTR0_STATUS 0x830 |
| 52 | |
| 53 | #define PCIE_ATU_VIEWPORT 0x900 |
| 54 | #define PCIE_ATU_REGION_INBOUND (0x1 << 31) |
| 55 | #define PCIE_ATU_REGION_OUTBOUND (0x0 << 31) |
| 56 | #define PCIE_ATU_REGION_INDEX2 (0x2 << 0) |
| 57 | #define PCIE_ATU_REGION_INDEX1 (0x1 << 0) |
| 58 | #define PCIE_ATU_REGION_INDEX0 (0x0 << 0) |
| 59 | #define PCIE_ATU_CR1 0x904 |
| 60 | #define PCIE_ATU_TYPE_MEM (0x0 << 0) |
| 61 | #define PCIE_ATU_TYPE_IO (0x2 << 0) |
| 62 | #define PCIE_ATU_TYPE_CFG0 (0x4 << 0) |
| 63 | #define PCIE_ATU_TYPE_CFG1 (0x5 << 0) |
| 64 | #define PCIE_ATU_CR2 0x908 |
| 65 | #define PCIE_ATU_ENABLE (0x1 << 31) |
| 66 | #define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30) |
| 67 | #define PCIE_ATU_LOWER_BASE 0x90C |
| 68 | #define PCIE_ATU_UPPER_BASE 0x910 |
| 69 | #define PCIE_ATU_LIMIT 0x914 |
| 70 | #define PCIE_ATU_LOWER_TARGET 0x918 |
| 71 | #define PCIE_ATU_BUS(x) (((x) & 0xff) << 24) |
| 72 | #define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19) |
| 73 | #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16) |
| 74 | #define PCIE_ATU_UPPER_TARGET 0x91C |
| 75 | |
| 76 | /* |
| 77 | * iATU Unroll-specific register definitions |
| 78 | * From 4.80 core version the address translation will be made by unroll |
| 79 | */ |
| 80 | #define PCIE_ATU_UNR_REGION_CTRL1 0x00 |
| 81 | #define PCIE_ATU_UNR_REGION_CTRL2 0x04 |
| 82 | #define PCIE_ATU_UNR_LOWER_BASE 0x08 |
| 83 | #define PCIE_ATU_UNR_UPPER_BASE 0x0C |
| 84 | #define PCIE_ATU_UNR_LIMIT 0x10 |
| 85 | #define PCIE_ATU_UNR_LOWER_TARGET 0x14 |
| 86 | #define PCIE_ATU_UNR_UPPER_TARGET 0x18 |
| 87 | |
| 88 | /* Register address builder */ |
| 89 | #define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \ |
| 90 | ((0x3 << 20) | ((region) << 9)) |
| 91 | |
Jingoo Han | f342d94 | 2013-09-06 15:54:59 +0900 | [diff] [blame] | 92 | /* |
| 93 | * Maximum number of MSI IRQs can be 256 per controller. But keep |
| 94 | * it 32 as of now. Probably we will never need more than 32. If needed, |
| 95 | * then increment it in multiple of 32. |
| 96 | */ |
| 97 | #define MAX_MSI_IRQS 32 |
| 98 | #define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32) |
| 99 | |
Kishon Vijay Abraham I | 442ec4c | 2017-02-15 18:48:14 +0530 | [diff] [blame] | 100 | struct pcie_port; |
| 101 | struct dw_pcie; |
| 102 | |
| 103 | struct dw_pcie_host_ops { |
| 104 | int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val); |
| 105 | int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val); |
| 106 | int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus, |
| 107 | unsigned int devfn, int where, int size, u32 *val); |
| 108 | int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus, |
| 109 | unsigned int devfn, int where, int size, u32 val); |
| 110 | void (*host_init)(struct pcie_port *pp); |
| 111 | void (*msi_set_irq)(struct pcie_port *pp, int irq); |
| 112 | void (*msi_clear_irq)(struct pcie_port *pp, int irq); |
| 113 | phys_addr_t (*get_msi_addr)(struct pcie_port *pp); |
| 114 | u32 (*get_msi_data)(struct pcie_port *pp, int pos); |
| 115 | void (*scan_bus)(struct pcie_port *pp); |
| 116 | int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip); |
| 117 | }; |
| 118 | |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 119 | struct pcie_port { |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 120 | u8 root_bus_nr; |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 121 | u64 cfg0_base; |
| 122 | void __iomem *va_cfg0_base; |
Pratyush Anand | adf70fc | 2014-09-05 17:48:54 -0600 | [diff] [blame] | 123 | u32 cfg0_size; |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 124 | u64 cfg1_base; |
| 125 | void __iomem *va_cfg1_base; |
Pratyush Anand | adf70fc | 2014-09-05 17:48:54 -0600 | [diff] [blame] | 126 | u32 cfg1_size; |
Zhou Wang | 0021d22 | 2015-10-29 19:57:06 -0500 | [diff] [blame] | 127 | resource_size_t io_base; |
Pratyush Anand | adf70fc | 2014-09-05 17:48:54 -0600 | [diff] [blame] | 128 | phys_addr_t io_bus_addr; |
| 129 | u32 io_size; |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 130 | u64 mem_base; |
Pratyush Anand | adf70fc | 2014-09-05 17:48:54 -0600 | [diff] [blame] | 131 | phys_addr_t mem_bus_addr; |
| 132 | u32 mem_size; |
Zhou Wang | 0021d22 | 2015-10-29 19:57:06 -0500 | [diff] [blame] | 133 | struct resource *cfg; |
| 134 | struct resource *io; |
| 135 | struct resource *mem; |
| 136 | struct resource *busn; |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 137 | int irq; |
Kishon Vijay Abraham I | 442ec4c | 2017-02-15 18:48:14 +0530 | [diff] [blame] | 138 | struct dw_pcie_host_ops *ops; |
Jingoo Han | f342d94 | 2013-09-06 15:54:59 +0900 | [diff] [blame] | 139 | int msi_irq; |
Pratyush Anand | 904d0e7 | 2013-10-09 21:32:12 +0900 | [diff] [blame] | 140 | struct irq_domain *irq_domain; |
Jingoo Han | f342d94 | 2013-09-06 15:54:59 +0900 | [diff] [blame] | 141 | unsigned long msi_data; |
| 142 | DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 143 | }; |
| 144 | |
Kishon Vijay Abraham I | 442ec4c | 2017-02-15 18:48:14 +0530 | [diff] [blame] | 145 | struct dw_pcie_ops { |
Kishon Vijay Abraham I | a660083 | 2017-03-13 19:13:22 +0530 | [diff] [blame] | 146 | u64 (*cpu_addr_fixup)(u64 cpu_addr); |
Kishon Vijay Abraham I | a509d7d | 2017-03-13 19:13:26 +0530 | [diff] [blame^] | 147 | u32 (*read_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg, |
| 148 | size_t size); |
| 149 | void (*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg, |
| 150 | size_t size, u32 val); |
Kishon Vijay Abraham I | 442ec4c | 2017-02-15 18:48:14 +0530 | [diff] [blame] | 151 | int (*link_up)(struct dw_pcie *pcie); |
Jingoo Han | 4b1ced8 | 2013-07-31 17:14:10 +0900 | [diff] [blame] | 152 | }; |
| 153 | |
Kishon Vijay Abraham I | 442ec4c | 2017-02-15 18:48:14 +0530 | [diff] [blame] | 154 | struct dw_pcie { |
| 155 | struct device *dev; |
| 156 | void __iomem *dbi_base; |
Kishon Vijay Abraham I | 442ec4c | 2017-02-15 18:48:14 +0530 | [diff] [blame] | 157 | u32 num_viewport; |
| 158 | u8 iatu_unroll_enabled; |
| 159 | struct pcie_port pp; |
| 160 | const struct dw_pcie_ops *ops; |
| 161 | }; |
| 162 | |
| 163 | #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp) |
| 164 | |
Kishon Vijay Abraham I | 19ce01cc | 2017-02-15 18:48:12 +0530 | [diff] [blame] | 165 | int dw_pcie_read(void __iomem *addr, int size, u32 *val); |
| 166 | int dw_pcie_write(void __iomem *addr, int size, u32 val); |
Seungwon Jeon | 18edf45 | 2013-10-09 09:12:21 -0600 | [diff] [blame] | 167 | |
Kishon Vijay Abraham I | a509d7d | 2017-03-13 19:13:26 +0530 | [diff] [blame^] | 168 | u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, |
| 169 | size_t size); |
| 170 | void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, |
| 171 | size_t size, u32 val); |
Kishon Vijay Abraham I | 442ec4c | 2017-02-15 18:48:14 +0530 | [diff] [blame] | 172 | int dw_pcie_link_up(struct dw_pcie *pci); |
| 173 | int dw_pcie_wait_for_link(struct dw_pcie *pci); |
Kishon Vijay Abraham I | feb85d9 | 2017-02-15 18:48:17 +0530 | [diff] [blame] | 174 | void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, |
| 175 | int type, u64 cpu_addr, u64 pci_addr, |
| 176 | u32 size); |
| 177 | void dw_pcie_setup(struct dw_pcie *pci); |
Kishon Vijay Abraham I | a056020 | 2017-02-15 18:48:18 +0530 | [diff] [blame] | 178 | |
Kishon Vijay Abraham I | b50b2db | 2017-03-13 19:13:25 +0530 | [diff] [blame] | 179 | static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val) |
| 180 | { |
Kishon Vijay Abraham I | a509d7d | 2017-03-13 19:13:26 +0530 | [diff] [blame^] | 181 | __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val); |
Kishon Vijay Abraham I | b50b2db | 2017-03-13 19:13:25 +0530 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg) |
| 185 | { |
Kishon Vijay Abraham I | a509d7d | 2017-03-13 19:13:26 +0530 | [diff] [blame^] | 186 | return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4); |
Kishon Vijay Abraham I | b50b2db | 2017-03-13 19:13:25 +0530 | [diff] [blame] | 187 | } |
| 188 | |
Kishon Vijay Abraham I | a056020 | 2017-02-15 18:48:18 +0530 | [diff] [blame] | 189 | #ifdef CONFIG_PCIE_DW_HOST |
| 190 | irqreturn_t dw_handle_msi_irq(struct pcie_port *pp); |
| 191 | void dw_pcie_msi_init(struct pcie_port *pp); |
| 192 | void dw_pcie_setup_rc(struct pcie_port *pp); |
| 193 | int dw_pcie_host_init(struct pcie_port *pp); |
| 194 | #else |
| 195 | static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) |
| 196 | { |
| 197 | return IRQ_NONE; |
| 198 | } |
| 199 | |
| 200 | static inline void dw_pcie_msi_init(struct pcie_port *pp) |
| 201 | { |
| 202 | } |
| 203 | |
| 204 | static inline void dw_pcie_setup_rc(struct pcie_port *pp) |
| 205 | { |
| 206 | } |
| 207 | |
| 208 | static inline int dw_pcie_host_init(struct pcie_port *pp) |
| 209 | { |
| 210 | return 0; |
| 211 | } |
| 212 | #endif |
Seungwon Jeon | 18edf45 | 2013-10-09 09:12:21 -0600 | [diff] [blame] | 213 | #endif /* _PCIE_DESIGNWARE_H */ |