Commit | Line | Data |
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4b1ced84 JH |
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 | ||
18edf451 SJ |
14 | #ifndef _PCIE_DESIGNWARE_H |
15 | #define _PCIE_DESIGNWARE_H | |
16 | ||
feb85d9b KVA |
17 | #include <linux/irq.h> |
18 | #include <linux/msi.h> | |
19 | #include <linux/pci.h> | |
20 | ||
f8aed6ec KVA |
21 | #include <linux/pci-epc.h> |
22 | #include <linux/pci-epf.h> | |
23 | ||
b90dc392 KVA |
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_MIN 9000 | |
32 | #define LINK_WAIT_IATU_MAX 10000 | |
33 | ||
34 | /* Synopsys-specific PCIe configuration registers */ | |
35 | #define PCIE_PORT_LINK_CONTROL 0x710 | |
36 | #define PORT_LINK_MODE_MASK (0x3f << 16) | |
37 | #define PORT_LINK_MODE_1_LANES (0x1 << 16) | |
38 | #define PORT_LINK_MODE_2_LANES (0x3 << 16) | |
39 | #define PORT_LINK_MODE_4_LANES (0x7 << 16) | |
40 | #define PORT_LINK_MODE_8_LANES (0xf << 16) | |
41 | ||
42 | #define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C | |
43 | #define PORT_LOGIC_SPEED_CHANGE (0x1 << 17) | |
44 | #define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8) | |
45 | #define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8) | |
46 | #define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8) | |
47 | #define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8) | |
48 | #define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8) | |
49 | ||
50 | #define PCIE_MSI_ADDR_LO 0x820 | |
51 | #define PCIE_MSI_ADDR_HI 0x824 | |
52 | #define PCIE_MSI_INTR0_ENABLE 0x828 | |
53 | #define PCIE_MSI_INTR0_MASK 0x82C | |
54 | #define PCIE_MSI_INTR0_STATUS 0x830 | |
55 | ||
56 | #define PCIE_ATU_VIEWPORT 0x900 | |
57 | #define PCIE_ATU_REGION_INBOUND (0x1 << 31) | |
58 | #define PCIE_ATU_REGION_OUTBOUND (0x0 << 31) | |
59 | #define PCIE_ATU_REGION_INDEX2 (0x2 << 0) | |
60 | #define PCIE_ATU_REGION_INDEX1 (0x1 << 0) | |
61 | #define PCIE_ATU_REGION_INDEX0 (0x0 << 0) | |
62 | #define PCIE_ATU_CR1 0x904 | |
63 | #define PCIE_ATU_TYPE_MEM (0x0 << 0) | |
64 | #define PCIE_ATU_TYPE_IO (0x2 << 0) | |
65 | #define PCIE_ATU_TYPE_CFG0 (0x4 << 0) | |
66 | #define PCIE_ATU_TYPE_CFG1 (0x5 << 0) | |
67 | #define PCIE_ATU_CR2 0x908 | |
68 | #define PCIE_ATU_ENABLE (0x1 << 31) | |
69 | #define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30) | |
70 | #define PCIE_ATU_LOWER_BASE 0x90C | |
71 | #define PCIE_ATU_UPPER_BASE 0x910 | |
72 | #define PCIE_ATU_LIMIT 0x914 | |
73 | #define PCIE_ATU_LOWER_TARGET 0x918 | |
74 | #define PCIE_ATU_BUS(x) (((x) & 0xff) << 24) | |
75 | #define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19) | |
76 | #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16) | |
77 | #define PCIE_ATU_UPPER_TARGET 0x91C | |
78 | ||
79 | /* | |
80 | * iATU Unroll-specific register definitions | |
81 | * From 4.80 core version the address translation will be made by unroll | |
82 | */ | |
83 | #define PCIE_ATU_UNR_REGION_CTRL1 0x00 | |
84 | #define PCIE_ATU_UNR_REGION_CTRL2 0x04 | |
85 | #define PCIE_ATU_UNR_LOWER_BASE 0x08 | |
86 | #define PCIE_ATU_UNR_UPPER_BASE 0x0C | |
87 | #define PCIE_ATU_UNR_LIMIT 0x10 | |
88 | #define PCIE_ATU_UNR_LOWER_TARGET 0x14 | |
89 | #define PCIE_ATU_UNR_UPPER_TARGET 0x18 | |
90 | ||
91 | /* Register address builder */ | |
92 | #define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \ | |
93 | ((0x3 << 20) | ((region) << 9)) | |
94 | ||
f8aed6ec KVA |
95 | #define PCIE_GET_ATU_INB_UNR_REG_OFFSET(region) \ |
96 | ((0x3 << 20) | ((region) << 9) | (0x1 << 8)) | |
97 | ||
98 | #define MSI_MESSAGE_CONTROL 0x52 | |
99 | #define MSI_CAP_MMC_SHIFT 1 | |
100 | #define MSI_CAP_MME_SHIFT 4 | |
101 | #define MSI_CAP_MME_MASK (7 << MSI_CAP_MME_SHIFT) | |
102 | #define MSI_MESSAGE_ADDR_L32 0x54 | |
103 | #define MSI_MESSAGE_ADDR_U32 0x58 | |
104 | ||
f342d940 JH |
105 | /* |
106 | * Maximum number of MSI IRQs can be 256 per controller. But keep | |
107 | * it 32 as of now. Probably we will never need more than 32. If needed, | |
108 | * then increment it in multiple of 32. | |
109 | */ | |
110 | #define MAX_MSI_IRQS 32 | |
111 | #define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32) | |
112 | ||
442ec4c0 KVA |
113 | struct pcie_port; |
114 | struct dw_pcie; | |
f8aed6ec KVA |
115 | struct dw_pcie_ep; |
116 | ||
117 | enum dw_pcie_region_type { | |
118 | DW_PCIE_REGION_UNKNOWN, | |
119 | DW_PCIE_REGION_INBOUND, | |
120 | DW_PCIE_REGION_OUTBOUND, | |
121 | }; | |
442ec4c0 | 122 | |
608793e2 KVA |
123 | enum dw_pcie_device_mode { |
124 | DW_PCIE_UNKNOWN_TYPE, | |
125 | DW_PCIE_EP_TYPE, | |
126 | DW_PCIE_LEG_EP_TYPE, | |
127 | DW_PCIE_RC_TYPE, | |
128 | }; | |
129 | ||
442ec4c0 KVA |
130 | struct dw_pcie_host_ops { |
131 | int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val); | |
132 | int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val); | |
133 | int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus, | |
134 | unsigned int devfn, int where, int size, u32 *val); | |
135 | int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus, | |
136 | unsigned int devfn, int where, int size, u32 val); | |
137 | void (*host_init)(struct pcie_port *pp); | |
138 | void (*msi_set_irq)(struct pcie_port *pp, int irq); | |
139 | void (*msi_clear_irq)(struct pcie_port *pp, int irq); | |
140 | phys_addr_t (*get_msi_addr)(struct pcie_port *pp); | |
141 | u32 (*get_msi_data)(struct pcie_port *pp, int pos); | |
142 | void (*scan_bus)(struct pcie_port *pp); | |
143 | int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip); | |
144 | }; | |
145 | ||
4b1ced84 | 146 | struct pcie_port { |
4b1ced84 | 147 | u8 root_bus_nr; |
4b1ced84 JH |
148 | u64 cfg0_base; |
149 | void __iomem *va_cfg0_base; | |
adf70fc0 | 150 | u32 cfg0_size; |
4b1ced84 JH |
151 | u64 cfg1_base; |
152 | void __iomem *va_cfg1_base; | |
adf70fc0 | 153 | u32 cfg1_size; |
0021d22b | 154 | resource_size_t io_base; |
adf70fc0 PA |
155 | phys_addr_t io_bus_addr; |
156 | u32 io_size; | |
4b1ced84 | 157 | u64 mem_base; |
adf70fc0 PA |
158 | phys_addr_t mem_bus_addr; |
159 | u32 mem_size; | |
0021d22b ZW |
160 | struct resource *cfg; |
161 | struct resource *io; | |
162 | struct resource *mem; | |
163 | struct resource *busn; | |
4b1ced84 | 164 | int irq; |
4ab2e7c0 | 165 | const struct dw_pcie_host_ops *ops; |
f342d940 | 166 | int msi_irq; |
904d0e78 | 167 | struct irq_domain *irq_domain; |
f342d940 JH |
168 | unsigned long msi_data; |
169 | DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); | |
4b1ced84 JH |
170 | }; |
171 | ||
f8aed6ec KVA |
172 | enum dw_pcie_as_type { |
173 | DW_PCIE_AS_UNKNOWN, | |
174 | DW_PCIE_AS_MEM, | |
175 | DW_PCIE_AS_IO, | |
176 | }; | |
177 | ||
178 | struct dw_pcie_ep_ops { | |
179 | void (*ep_init)(struct dw_pcie_ep *ep); | |
180 | int (*raise_irq)(struct dw_pcie_ep *ep, enum pci_epc_irq_type type, | |
181 | u8 interrupt_num); | |
182 | }; | |
183 | ||
184 | struct dw_pcie_ep { | |
185 | struct pci_epc *epc; | |
186 | struct dw_pcie_ep_ops *ops; | |
187 | phys_addr_t phys_base; | |
188 | size_t addr_size; | |
189 | u8 bar_to_atu[6]; | |
190 | phys_addr_t *outbound_addr; | |
191 | unsigned long ib_window_map; | |
192 | unsigned long ob_window_map; | |
193 | u32 num_ib_windows; | |
194 | u32 num_ob_windows; | |
195 | }; | |
196 | ||
442ec4c0 | 197 | struct dw_pcie_ops { |
a660083e | 198 | u64 (*cpu_addr_fixup)(u64 cpu_addr); |
a509d7d9 KVA |
199 | u32 (*read_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg, |
200 | size_t size); | |
201 | void (*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg, | |
202 | size_t size, u32 val); | |
442ec4c0 | 203 | int (*link_up)(struct dw_pcie *pcie); |
f8aed6ec KVA |
204 | int (*start_link)(struct dw_pcie *pcie); |
205 | void (*stop_link)(struct dw_pcie *pcie); | |
4b1ced84 JH |
206 | }; |
207 | ||
442ec4c0 KVA |
208 | struct dw_pcie { |
209 | struct device *dev; | |
210 | void __iomem *dbi_base; | |
f8aed6ec | 211 | void __iomem *dbi_base2; |
442ec4c0 KVA |
212 | u32 num_viewport; |
213 | u8 iatu_unroll_enabled; | |
214 | struct pcie_port pp; | |
f8aed6ec | 215 | struct dw_pcie_ep ep; |
442ec4c0 KVA |
216 | const struct dw_pcie_ops *ops; |
217 | }; | |
218 | ||
219 | #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp) | |
220 | ||
f8aed6ec KVA |
221 | #define to_dw_pcie_from_ep(endpoint) \ |
222 | container_of((endpoint), struct dw_pcie, ep) | |
223 | ||
19ce01cc KVA |
224 | int dw_pcie_read(void __iomem *addr, int size, u32 *val); |
225 | int dw_pcie_write(void __iomem *addr, int size, u32 val); | |
18edf451 | 226 | |
a509d7d9 KVA |
227 | u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, |
228 | size_t size); | |
229 | void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, | |
230 | size_t size, u32 val); | |
442ec4c0 KVA |
231 | int dw_pcie_link_up(struct dw_pcie *pci); |
232 | int dw_pcie_wait_for_link(struct dw_pcie *pci); | |
feb85d9b KVA |
233 | void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, |
234 | int type, u64 cpu_addr, u64 pci_addr, | |
235 | u32 size); | |
f8aed6ec KVA |
236 | int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar, |
237 | u64 cpu_addr, enum dw_pcie_as_type as_type); | |
238 | void dw_pcie_disable_atu(struct dw_pcie *pci, int index, | |
239 | enum dw_pcie_region_type type); | |
feb85d9b | 240 | void dw_pcie_setup(struct dw_pcie *pci); |
a0560209 | 241 | |
b50b2db2 KVA |
242 | static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val) |
243 | { | |
a509d7d9 | 244 | __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val); |
b50b2db2 KVA |
245 | } |
246 | ||
247 | static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg) | |
248 | { | |
a509d7d9 | 249 | return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4); |
b50b2db2 KVA |
250 | } |
251 | ||
f8aed6ec KVA |
252 | static inline void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val) |
253 | { | |
254 | __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val); | |
255 | } | |
256 | ||
257 | static inline u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg) | |
258 | { | |
259 | return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2); | |
260 | } | |
261 | ||
262 | static inline void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val) | |
263 | { | |
264 | __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val); | |
265 | } | |
266 | ||
267 | static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg) | |
268 | { | |
269 | return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1); | |
270 | } | |
271 | ||
272 | static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val) | |
273 | { | |
274 | __dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, val); | |
275 | } | |
276 | ||
277 | static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg) | |
278 | { | |
279 | return __dw_pcie_read_dbi(pci, pci->dbi_base2, reg, 0x4); | |
280 | } | |
281 | ||
a0560209 KVA |
282 | #ifdef CONFIG_PCIE_DW_HOST |
283 | irqreturn_t dw_handle_msi_irq(struct pcie_port *pp); | |
284 | void dw_pcie_msi_init(struct pcie_port *pp); | |
285 | void dw_pcie_setup_rc(struct pcie_port *pp); | |
286 | int dw_pcie_host_init(struct pcie_port *pp); | |
287 | #else | |
288 | static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) | |
289 | { | |
290 | return IRQ_NONE; | |
291 | } | |
292 | ||
293 | static inline void dw_pcie_msi_init(struct pcie_port *pp) | |
294 | { | |
295 | } | |
296 | ||
297 | static inline void dw_pcie_setup_rc(struct pcie_port *pp) | |
298 | { | |
299 | } | |
300 | ||
301 | static inline int dw_pcie_host_init(struct pcie_port *pp) | |
302 | { | |
303 | return 0; | |
304 | } | |
305 | #endif | |
f8aed6ec KVA |
306 | |
307 | #ifdef CONFIG_PCIE_DW_EP | |
308 | void dw_pcie_ep_linkup(struct dw_pcie_ep *ep); | |
309 | int dw_pcie_ep_init(struct dw_pcie_ep *ep); | |
310 | void dw_pcie_ep_exit(struct dw_pcie_ep *ep); | |
311 | #else | |
312 | static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep) | |
313 | { | |
314 | } | |
315 | ||
316 | static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep) | |
317 | { | |
318 | return 0; | |
319 | } | |
320 | ||
321 | static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep) | |
322 | { | |
323 | } | |
324 | #endif | |
18edf451 | 325 | #endif /* _PCIE_DESIGNWARE_H */ |