rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [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 | |
| 14 | #ifndef _PCIE_DESIGNWARE_H |
| 15 | #define _PCIE_DESIGNWARE_H |
| 16 | |
| 17 | #include <linux/irq.h> |
| 18 | #include <linux/msi.h> |
| 19 | #include <linux/pci.h> |
| 20 | |
| 21 | #include <linux/pci-epc.h> |
| 22 | #include <linux/pci-epf.h> |
| 23 | |
| 24 | /* Parameters for the waiting for link up routine */ |
| 25 | #define LINK_WAIT_MAX_RETRIES 10 |
| 26 | #define LINK_WAIT_USLEEP_MIN 90000 |
| 27 | #define LINK_WAIT_USLEEP_MAX 100000 |
| 28 | |
| 29 | /* Parameters for the waiting for iATU enabled routine */ |
| 30 | #define LINK_WAIT_MAX_IATU_RETRIES 5 |
| 31 | #define LINK_WAIT_IATU 9 |
| 32 | |
| 33 | /* Synopsys-specific PCIe configuration registers */ |
| 34 | #define PCIE_PORT_LINK_CONTROL 0x710 |
| 35 | #define PORT_LINK_MODE_MASK (0x3f << 16) |
| 36 | #define PORT_LINK_MODE_1_LANES (0x1 << 16) |
| 37 | #define PORT_LINK_MODE_2_LANES (0x3 << 16) |
| 38 | #define PORT_LINK_MODE_4_LANES (0x7 << 16) |
| 39 | #define PORT_LINK_MODE_8_LANES (0xf << 16) |
| 40 | |
| 41 | #define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C |
| 42 | #define PORT_LOGIC_SPEED_CHANGE (0x1 << 17) |
| 43 | #define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8) |
| 44 | #define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8) |
| 45 | #define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8) |
| 46 | #define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8) |
| 47 | #define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8) |
| 48 | |
| 49 | #define PCIE_MSI_ADDR_LO 0x820 |
| 50 | #define PCIE_MSI_ADDR_HI 0x824 |
| 51 | #define PCIE_MSI_INTR0_ENABLE 0x828 |
| 52 | #define PCIE_MSI_INTR0_MASK 0x82C |
| 53 | #define PCIE_MSI_INTR0_STATUS 0x830 |
| 54 | |
| 55 | #define PCIE_ATU_VIEWPORT 0x900 |
| 56 | #define PCIE_ATU_REGION_INBOUND (0x1 << 31) |
| 57 | #define PCIE_ATU_REGION_OUTBOUND (0x0 << 31) |
| 58 | #define PCIE_ATU_REGION_INDEX2 (0x2 << 0) |
| 59 | #define PCIE_ATU_REGION_INDEX1 (0x1 << 0) |
| 60 | #define PCIE_ATU_REGION_INDEX0 (0x0 << 0) |
| 61 | #define PCIE_ATU_CR1 0x904 |
| 62 | #define PCIE_ATU_TYPE_MEM (0x0 << 0) |
| 63 | #define PCIE_ATU_TYPE_IO (0x2 << 0) |
| 64 | #define PCIE_ATU_TYPE_CFG0 (0x4 << 0) |
| 65 | #define PCIE_ATU_TYPE_CFG1 (0x5 << 0) |
| 66 | #define PCIE_ATU_CR2 0x908 |
| 67 | #define PCIE_ATU_ENABLE (0x1 << 31) |
| 68 | #define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30) |
| 69 | #define PCIE_ATU_LOWER_BASE 0x90C |
| 70 | #define PCIE_ATU_UPPER_BASE 0x910 |
| 71 | #define PCIE_ATU_LIMIT 0x914 |
| 72 | #define PCIE_ATU_LOWER_TARGET 0x918 |
| 73 | #define PCIE_ATU_BUS(x) (((x) & 0xff) << 24) |
| 74 | #define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19) |
| 75 | #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16) |
| 76 | #define PCIE_ATU_UPPER_TARGET 0x91C |
| 77 | |
| 78 | #define PCIE_MISC_CONTROL_1_OFF 0x8BC |
| 79 | #define PCIE_DBI_RO_WR_EN (0x1 << 0) |
| 80 | |
| 81 | /* |
| 82 | * iATU Unroll-specific register definitions |
| 83 | * From 4.80 core version the address translation will be made by unroll |
| 84 | */ |
| 85 | #define PCIE_ATU_UNR_REGION_CTRL1 0x00 |
| 86 | #define PCIE_ATU_UNR_REGION_CTRL2 0x04 |
| 87 | #define PCIE_ATU_UNR_LOWER_BASE 0x08 |
| 88 | #define PCIE_ATU_UNR_UPPER_BASE 0x0C |
| 89 | #define PCIE_ATU_UNR_LIMIT 0x10 |
| 90 | #define PCIE_ATU_UNR_LOWER_TARGET 0x14 |
| 91 | #define PCIE_ATU_UNR_UPPER_TARGET 0x18 |
| 92 | |
| 93 | /* Register address builder */ |
| 94 | #define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \ |
| 95 | ((0x3 << 20) | ((region) << 9)) |
| 96 | |
| 97 | #define PCIE_GET_ATU_INB_UNR_REG_OFFSET(region) \ |
| 98 | ((0x3 << 20) | ((region) << 9) | (0x1 << 8)) |
| 99 | |
| 100 | #define MSI_MESSAGE_CONTROL 0x52 |
| 101 | #define MSI_CAP_MMC_SHIFT 1 |
| 102 | #define MSI_CAP_MMC_MASK (7 << MSI_CAP_MMC_SHIFT) |
| 103 | #define MSI_CAP_MME_SHIFT 4 |
| 104 | #define MSI_CAP_MSI_EN_MASK 0x1 |
| 105 | #define MSI_CAP_MME_MASK (7 << MSI_CAP_MME_SHIFT) |
| 106 | #define MSI_MESSAGE_ADDR_L32 0x54 |
| 107 | #define MSI_MESSAGE_ADDR_U32 0x58 |
| 108 | |
| 109 | /* |
| 110 | * Maximum number of MSI IRQs can be 256 per controller. But keep |
| 111 | * it 32 as of now. Probably we will never need more than 32. If needed, |
| 112 | * then increment it in multiple of 32. |
| 113 | */ |
| 114 | #define MAX_MSI_IRQS 32 |
| 115 | #define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32) |
| 116 | |
| 117 | /* Maximum number of inbound/outbound iATUs */ |
| 118 | #define MAX_IATU_IN 256 |
| 119 | #define MAX_IATU_OUT 256 |
| 120 | |
| 121 | struct pcie_port; |
| 122 | struct dw_pcie; |
| 123 | struct dw_pcie_ep; |
| 124 | |
| 125 | enum dw_pcie_region_type { |
| 126 | DW_PCIE_REGION_UNKNOWN, |
| 127 | DW_PCIE_REGION_INBOUND, |
| 128 | DW_PCIE_REGION_OUTBOUND, |
| 129 | }; |
| 130 | |
| 131 | enum dw_pcie_device_mode { |
| 132 | DW_PCIE_UNKNOWN_TYPE, |
| 133 | DW_PCIE_EP_TYPE, |
| 134 | DW_PCIE_LEG_EP_TYPE, |
| 135 | DW_PCIE_RC_TYPE, |
| 136 | }; |
| 137 | |
| 138 | struct dw_pcie_host_ops { |
| 139 | int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val); |
| 140 | int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val); |
| 141 | int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus, |
| 142 | unsigned int devfn, int where, int size, u32 *val); |
| 143 | int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus, |
| 144 | unsigned int devfn, int where, int size, u32 val); |
| 145 | int (*host_init)(struct pcie_port *pp); |
| 146 | void (*msi_set_irq)(struct pcie_port *pp, int irq); |
| 147 | void (*msi_clear_irq)(struct pcie_port *pp, int irq); |
| 148 | phys_addr_t (*get_msi_addr)(struct pcie_port *pp); |
| 149 | u32 (*get_msi_data)(struct pcie_port *pp, int pos); |
| 150 | void (*scan_bus)(struct pcie_port *pp); |
| 151 | int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip); |
| 152 | }; |
| 153 | |
| 154 | struct pcie_port { |
| 155 | u8 root_bus_nr; |
| 156 | u64 cfg0_base; |
| 157 | void __iomem *va_cfg0_base; |
| 158 | u32 cfg0_size; |
| 159 | u64 cfg1_base; |
| 160 | void __iomem *va_cfg1_base; |
| 161 | u32 cfg1_size; |
| 162 | resource_size_t io_base; |
| 163 | phys_addr_t io_bus_addr; |
| 164 | u32 io_size; |
| 165 | u64 mem_base; |
| 166 | phys_addr_t mem_bus_addr; |
| 167 | u32 mem_size; |
| 168 | struct resource *cfg; |
| 169 | struct resource *io; |
| 170 | struct resource *mem; |
| 171 | struct resource *busn; |
| 172 | int irq; |
| 173 | const struct dw_pcie_host_ops *ops; |
| 174 | int msi_irq; |
| 175 | struct irq_domain *irq_domain; |
| 176 | unsigned long msi_data; |
| 177 | DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); |
| 178 | }; |
| 179 | |
| 180 | enum dw_pcie_as_type { |
| 181 | DW_PCIE_AS_UNKNOWN, |
| 182 | DW_PCIE_AS_MEM, |
| 183 | DW_PCIE_AS_IO, |
| 184 | }; |
| 185 | |
| 186 | struct dw_pcie_ep_ops { |
| 187 | void (*ep_init)(struct dw_pcie_ep *ep); |
| 188 | int (*raise_irq)(struct dw_pcie_ep *ep, enum pci_epc_irq_type type, |
| 189 | u8 interrupt_num); |
| 190 | }; |
| 191 | |
| 192 | struct dw_pcie_ep { |
| 193 | struct pci_epc *epc; |
| 194 | struct dw_pcie_ep_ops *ops; |
| 195 | phys_addr_t phys_base; |
| 196 | size_t addr_size; |
| 197 | size_t page_size; |
| 198 | u8 bar_to_atu[6]; |
| 199 | phys_addr_t *outbound_addr; |
| 200 | unsigned long *ib_window_map; |
| 201 | unsigned long *ob_window_map; |
| 202 | u32 num_ib_windows; |
| 203 | u32 num_ob_windows; |
| 204 | }; |
| 205 | |
| 206 | struct dw_pcie_ops { |
| 207 | u64 (*cpu_addr_fixup)(u64 cpu_addr); |
| 208 | u32 (*read_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg, |
| 209 | size_t size); |
| 210 | void (*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg, |
| 211 | size_t size, u32 val); |
| 212 | int (*link_up)(struct dw_pcie *pcie); |
| 213 | int (*start_link)(struct dw_pcie *pcie); |
| 214 | void (*stop_link)(struct dw_pcie *pcie); |
| 215 | }; |
| 216 | |
| 217 | struct dw_pcie { |
| 218 | struct device *dev; |
| 219 | void __iomem *dbi_base; |
| 220 | void __iomem *dbi_base2; |
| 221 | u32 num_viewport; |
| 222 | u8 iatu_unroll_enabled; |
| 223 | struct pcie_port pp; |
| 224 | struct dw_pcie_ep ep; |
| 225 | const struct dw_pcie_ops *ops; |
| 226 | }; |
| 227 | |
| 228 | #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp) |
| 229 | |
| 230 | #define to_dw_pcie_from_ep(endpoint) \ |
| 231 | container_of((endpoint), struct dw_pcie, ep) |
| 232 | |
| 233 | int dw_pcie_read(void __iomem *addr, int size, u32 *val); |
| 234 | int dw_pcie_write(void __iomem *addr, int size, u32 val); |
| 235 | |
| 236 | u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, |
| 237 | size_t size); |
| 238 | void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, |
| 239 | size_t size, u32 val); |
| 240 | int dw_pcie_link_up(struct dw_pcie *pci); |
| 241 | int dw_pcie_wait_for_link(struct dw_pcie *pci); |
| 242 | void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, |
| 243 | int type, u64 cpu_addr, u64 pci_addr, |
| 244 | u32 size); |
| 245 | int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar, |
| 246 | u64 cpu_addr, enum dw_pcie_as_type as_type); |
| 247 | void dw_pcie_disable_atu(struct dw_pcie *pci, int index, |
| 248 | enum dw_pcie_region_type type); |
| 249 | void dw_pcie_setup(struct dw_pcie *pci); |
| 250 | |
| 251 | static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val) |
| 252 | { |
| 253 | __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val); |
| 254 | } |
| 255 | |
| 256 | static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg) |
| 257 | { |
| 258 | return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4); |
| 259 | } |
| 260 | |
| 261 | static inline void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val) |
| 262 | { |
| 263 | __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val); |
| 264 | } |
| 265 | |
| 266 | static inline u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg) |
| 267 | { |
| 268 | return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2); |
| 269 | } |
| 270 | |
| 271 | static inline void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val) |
| 272 | { |
| 273 | __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val); |
| 274 | } |
| 275 | |
| 276 | static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg) |
| 277 | { |
| 278 | return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1); |
| 279 | } |
| 280 | |
| 281 | static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val) |
| 282 | { |
| 283 | __dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, val); |
| 284 | } |
| 285 | |
| 286 | static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg) |
| 287 | { |
| 288 | return __dw_pcie_read_dbi(pci, pci->dbi_base2, reg, 0x4); |
| 289 | } |
| 290 | |
| 291 | static inline void dw_pcie_dbi_ro_wr_en(struct dw_pcie *pci) |
| 292 | { |
| 293 | u32 reg; |
| 294 | u32 val; |
| 295 | |
| 296 | reg = PCIE_MISC_CONTROL_1_OFF; |
| 297 | val = dw_pcie_readl_dbi(pci, reg); |
| 298 | val |= PCIE_DBI_RO_WR_EN; |
| 299 | dw_pcie_writel_dbi(pci, reg, val); |
| 300 | } |
| 301 | |
| 302 | static inline void dw_pcie_dbi_ro_wr_dis(struct dw_pcie *pci) |
| 303 | { |
| 304 | u32 reg; |
| 305 | u32 val; |
| 306 | |
| 307 | reg = PCIE_MISC_CONTROL_1_OFF; |
| 308 | val = dw_pcie_readl_dbi(pci, reg); |
| 309 | val &= ~PCIE_DBI_RO_WR_EN; |
| 310 | dw_pcie_writel_dbi(pci, reg, val); |
| 311 | } |
| 312 | |
| 313 | #ifdef CONFIG_PCIE_DW_HOST |
| 314 | irqreturn_t dw_handle_msi_irq(struct pcie_port *pp); |
| 315 | void dw_pcie_msi_init(struct pcie_port *pp); |
| 316 | void dw_pcie_setup_rc(struct pcie_port *pp); |
| 317 | int dw_pcie_host_init(struct pcie_port *pp); |
| 318 | #else |
| 319 | static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) |
| 320 | { |
| 321 | return IRQ_NONE; |
| 322 | } |
| 323 | |
| 324 | static inline void dw_pcie_msi_init(struct pcie_port *pp) |
| 325 | { |
| 326 | } |
| 327 | |
| 328 | static inline void dw_pcie_setup_rc(struct pcie_port *pp) |
| 329 | { |
| 330 | } |
| 331 | |
| 332 | static inline int dw_pcie_host_init(struct pcie_port *pp) |
| 333 | { |
| 334 | return 0; |
| 335 | } |
| 336 | #endif |
| 337 | |
| 338 | #ifdef CONFIG_PCIE_DW_EP |
| 339 | void dw_pcie_ep_linkup(struct dw_pcie_ep *ep); |
| 340 | int dw_pcie_ep_init(struct dw_pcie_ep *ep); |
| 341 | void dw_pcie_ep_exit(struct dw_pcie_ep *ep); |
| 342 | #else |
| 343 | static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep) |
| 344 | { |
| 345 | } |
| 346 | |
| 347 | static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep) |
| 348 | { |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep) |
| 353 | { |
| 354 | } |
| 355 | #endif |
| 356 | #endif /* _PCIE_DESIGNWARE_H */ |