blob: cca0b93c97ac9cf620e7e143fb2842bf4bd2790a [file] [log] [blame]
Jingoo Han4b1ced82013-07-31 17:14:10 +09001/*
Bjorn Helgaas96291d52017-09-01 16:35:50 -05002 * Synopsys DesignWare PCIe host controller driver
Jingoo Han4b1ced82013-07-31 17:14:10 +09003 *
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 Jeon18edf452013-10-09 09:12:21 -060014#ifndef _PCIE_DESIGNWARE_H
15#define _PCIE_DESIGNWARE_H
16
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +053017#include <linux/irq.h>
18#include <linux/msi.h>
19#include <linux/pci.h>
20
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +053021#include <linux/pci-epc.h>
22#include <linux/pci-epf.h>
23
Kishon Vijay Abraham Ib90dc392017-02-15 18:48:10 +053024/* 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
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +053095#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
Jingoo Hanf342d942013-09-06 15:54:59 +0900105/*
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
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530113struct pcie_port;
114struct dw_pcie;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530115struct dw_pcie_ep;
116
117enum dw_pcie_region_type {
118 DW_PCIE_REGION_UNKNOWN,
119 DW_PCIE_REGION_INBOUND,
120 DW_PCIE_REGION_OUTBOUND,
121};
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530122
Kishon Vijay Abraham I608793e2017-03-27 15:15:08 +0530123enum 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
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530130struct 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
Jingoo Han4b1ced82013-07-31 17:14:10 +0900146struct pcie_port {
Jingoo Han4b1ced82013-07-31 17:14:10 +0900147 u8 root_bus_nr;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900148 u64 cfg0_base;
149 void __iomem *va_cfg0_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600150 u32 cfg0_size;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900151 u64 cfg1_base;
152 void __iomem *va_cfg1_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600153 u32 cfg1_size;
Zhou Wang0021d222015-10-29 19:57:06 -0500154 resource_size_t io_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600155 phys_addr_t io_bus_addr;
156 u32 io_size;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900157 u64 mem_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600158 phys_addr_t mem_bus_addr;
159 u32 mem_size;
Zhou Wang0021d222015-10-29 19:57:06 -0500160 struct resource *cfg;
161 struct resource *io;
162 struct resource *mem;
163 struct resource *busn;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900164 int irq;
Jisheng Zhang4ab2e7c2017-06-05 16:53:46 +0800165 const struct dw_pcie_host_ops *ops;
Jingoo Hanf342d942013-09-06 15:54:59 +0900166 int msi_irq;
Pratyush Anand904d0e72013-10-09 21:32:12 +0900167 struct irq_domain *irq_domain;
Jingoo Hanf342d942013-09-06 15:54:59 +0900168 unsigned long msi_data;
169 DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
Jingoo Han4b1ced82013-07-31 17:14:10 +0900170};
171
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530172enum dw_pcie_as_type {
173 DW_PCIE_AS_UNKNOWN,
174 DW_PCIE_AS_MEM,
175 DW_PCIE_AS_IO,
176};
177
178struct 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
184struct 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
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530197struct dw_pcie_ops {
Kishon Vijay Abraham Ia6600832017-03-13 19:13:22 +0530198 u64 (*cpu_addr_fixup)(u64 cpu_addr);
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530199 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);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530203 int (*link_up)(struct dw_pcie *pcie);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530204 int (*start_link)(struct dw_pcie *pcie);
205 void (*stop_link)(struct dw_pcie *pcie);
Jingoo Han4b1ced82013-07-31 17:14:10 +0900206};
207
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530208struct dw_pcie {
209 struct device *dev;
210 void __iomem *dbi_base;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530211 void __iomem *dbi_base2;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530212 u32 num_viewport;
213 u8 iatu_unroll_enabled;
214 struct pcie_port pp;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530215 struct dw_pcie_ep ep;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530216 const struct dw_pcie_ops *ops;
217};
218
219#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
220
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530221#define to_dw_pcie_from_ep(endpoint) \
222 container_of((endpoint), struct dw_pcie, ep)
223
Kishon Vijay Abraham I19ce01cc2017-02-15 18:48:12 +0530224int dw_pcie_read(void __iomem *addr, int size, u32 *val);
225int dw_pcie_write(void __iomem *addr, int size, u32 val);
Seungwon Jeon18edf452013-10-09 09:12:21 -0600226
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530227u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
228 size_t size);
229void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
230 size_t size, u32 val);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530231int dw_pcie_link_up(struct dw_pcie *pci);
232int dw_pcie_wait_for_link(struct dw_pcie *pci);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530233void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
234 int type, u64 cpu_addr, u64 pci_addr,
235 u32 size);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530236int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
237 u64 cpu_addr, enum dw_pcie_as_type as_type);
238void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
239 enum dw_pcie_region_type type);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530240void dw_pcie_setup(struct dw_pcie *pci);
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530241
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530242static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
243{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530244 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530245}
246
247static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
248{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530249 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530250}
251
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530252static 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
257static 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
262static 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
267static 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
272static 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
277static 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
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530282#ifdef CONFIG_PCIE_DW_HOST
283irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
284void dw_pcie_msi_init(struct pcie_port *pp);
285void dw_pcie_setup_rc(struct pcie_port *pp);
286int dw_pcie_host_init(struct pcie_port *pp);
287#else
288static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
289{
290 return IRQ_NONE;
291}
292
293static inline void dw_pcie_msi_init(struct pcie_port *pp)
294{
295}
296
297static inline void dw_pcie_setup_rc(struct pcie_port *pp)
298{
299}
300
301static inline int dw_pcie_host_init(struct pcie_port *pp)
302{
303 return 0;
304}
305#endif
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530306
307#ifdef CONFIG_PCIE_DW_EP
308void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
309int dw_pcie_ep_init(struct dw_pcie_ep *ep);
310void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
311#else
312static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
313{
314}
315
316static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep)
317{
318 return 0;
319}
320
321static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
322{
323}
324#endif
Seungwon Jeon18edf452013-10-09 09:12:21 -0600325#endif /* _PCIE_DESIGNWARE_H */