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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
Hou Zhiqiange44abfe2017-08-28 18:52:59 +080079#define PCIE_MISC_CONTROL_1_OFF 0x8BC
80#define PCIE_DBI_RO_WR_EN (0x1 << 0)
81
Kishon Vijay Abraham Ib90dc392017-02-15 18:48:10 +053082/*
83 * iATU Unroll-specific register definitions
84 * From 4.80 core version the address translation will be made by unroll
85 */
86#define PCIE_ATU_UNR_REGION_CTRL1 0x00
87#define PCIE_ATU_UNR_REGION_CTRL2 0x04
88#define PCIE_ATU_UNR_LOWER_BASE 0x08
89#define PCIE_ATU_UNR_UPPER_BASE 0x0C
90#define PCIE_ATU_UNR_LIMIT 0x10
91#define PCIE_ATU_UNR_LOWER_TARGET 0x14
92#define PCIE_ATU_UNR_UPPER_TARGET 0x18
93
94/* Register address builder */
95#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \
96 ((0x3 << 20) | ((region) << 9))
97
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +053098#define PCIE_GET_ATU_INB_UNR_REG_OFFSET(region) \
99 ((0x3 << 20) | ((region) << 9) | (0x1 << 8))
100
101#define MSI_MESSAGE_CONTROL 0x52
102#define MSI_CAP_MMC_SHIFT 1
103#define MSI_CAP_MME_SHIFT 4
104#define MSI_CAP_MME_MASK (7 << MSI_CAP_MME_SHIFT)
105#define MSI_MESSAGE_ADDR_L32 0x54
106#define MSI_MESSAGE_ADDR_U32 0x58
107
Jingoo Hanf342d942013-09-06 15:54:59 +0900108/*
109 * Maximum number of MSI IRQs can be 256 per controller. But keep
110 * it 32 as of now. Probably we will never need more than 32. If needed,
111 * then increment it in multiple of 32.
112 */
113#define MAX_MSI_IRQS 32
114#define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32)
115
Niklas Casselad4a5be2017-12-14 14:01:44 +0100116/* Maximum number of inbound/outbound iATUs */
117#define MAX_IATU_IN 256
118#define MAX_IATU_OUT 256
119
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530120struct pcie_port;
121struct dw_pcie;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530122struct dw_pcie_ep;
123
124enum dw_pcie_region_type {
125 DW_PCIE_REGION_UNKNOWN,
126 DW_PCIE_REGION_INBOUND,
127 DW_PCIE_REGION_OUTBOUND,
128};
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530129
Kishon Vijay Abraham I608793e2017-03-27 15:15:08 +0530130enum dw_pcie_device_mode {
131 DW_PCIE_UNKNOWN_TYPE,
132 DW_PCIE_EP_TYPE,
133 DW_PCIE_LEG_EP_TYPE,
134 DW_PCIE_RC_TYPE,
135};
136
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530137struct dw_pcie_host_ops {
138 int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
139 int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
140 int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
141 unsigned int devfn, int where, int size, u32 *val);
142 int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
143 unsigned int devfn, int where, int size, u32 val);
Bjorn Andersson4a301762017-07-15 23:39:45 -0700144 int (*host_init)(struct pcie_port *pp);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530145 void (*msi_set_irq)(struct pcie_port *pp, int irq);
146 void (*msi_clear_irq)(struct pcie_port *pp, int irq);
147 phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
148 u32 (*get_msi_data)(struct pcie_port *pp, int pos);
149 void (*scan_bus)(struct pcie_port *pp);
150 int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
151};
152
Jingoo Han4b1ced82013-07-31 17:14:10 +0900153struct pcie_port {
Jingoo Han4b1ced82013-07-31 17:14:10 +0900154 u8 root_bus_nr;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900155 u64 cfg0_base;
156 void __iomem *va_cfg0_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600157 u32 cfg0_size;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900158 u64 cfg1_base;
159 void __iomem *va_cfg1_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600160 u32 cfg1_size;
Zhou Wang0021d222015-10-29 19:57:06 -0500161 resource_size_t io_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600162 phys_addr_t io_bus_addr;
163 u32 io_size;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900164 u64 mem_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600165 phys_addr_t mem_bus_addr;
166 u32 mem_size;
Zhou Wang0021d222015-10-29 19:57:06 -0500167 struct resource *cfg;
168 struct resource *io;
169 struct resource *mem;
170 struct resource *busn;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900171 int irq;
Jisheng Zhang4ab2e7c2017-06-05 16:53:46 +0800172 const struct dw_pcie_host_ops *ops;
Jingoo Hanf342d942013-09-06 15:54:59 +0900173 int msi_irq;
Pratyush Anand904d0e72013-10-09 21:32:12 +0900174 struct irq_domain *irq_domain;
Jingoo Hanf342d942013-09-06 15:54:59 +0900175 unsigned long msi_data;
176 DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
Jingoo Han4b1ced82013-07-31 17:14:10 +0900177};
178
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530179enum dw_pcie_as_type {
180 DW_PCIE_AS_UNKNOWN,
181 DW_PCIE_AS_MEM,
182 DW_PCIE_AS_IO,
183};
184
185struct dw_pcie_ep_ops {
186 void (*ep_init)(struct dw_pcie_ep *ep);
187 int (*raise_irq)(struct dw_pcie_ep *ep, enum pci_epc_irq_type type,
188 u8 interrupt_num);
189};
190
191struct dw_pcie_ep {
192 struct pci_epc *epc;
193 struct dw_pcie_ep_ops *ops;
194 phys_addr_t phys_base;
195 size_t addr_size;
Kishon Vijay Abraham Ia937fe02017-08-18 20:28:02 +0530196 size_t page_size;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530197 u8 bar_to_atu[6];
198 phys_addr_t *outbound_addr;
Niklas Casselad4a5be2017-12-14 14:01:44 +0100199 unsigned long *ib_window_map;
200 unsigned long *ob_window_map;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530201 u32 num_ib_windows;
202 u32 num_ob_windows;
203};
204
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530205struct dw_pcie_ops {
Kishon Vijay Abraham Ia6600832017-03-13 19:13:22 +0530206 u64 (*cpu_addr_fixup)(u64 cpu_addr);
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530207 u32 (*read_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
208 size_t size);
209 void (*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
210 size_t size, u32 val);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530211 int (*link_up)(struct dw_pcie *pcie);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530212 int (*start_link)(struct dw_pcie *pcie);
213 void (*stop_link)(struct dw_pcie *pcie);
Jingoo Han4b1ced82013-07-31 17:14:10 +0900214};
215
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530216struct dw_pcie {
217 struct device *dev;
218 void __iomem *dbi_base;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530219 void __iomem *dbi_base2;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530220 u32 num_viewport;
221 u8 iatu_unroll_enabled;
222 struct pcie_port pp;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530223 struct dw_pcie_ep ep;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530224 const struct dw_pcie_ops *ops;
225};
226
227#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
228
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530229#define to_dw_pcie_from_ep(endpoint) \
230 container_of((endpoint), struct dw_pcie, ep)
231
Kishon Vijay Abraham I19ce01cc2017-02-15 18:48:12 +0530232int dw_pcie_read(void __iomem *addr, int size, u32 *val);
233int dw_pcie_write(void __iomem *addr, int size, u32 val);
Seungwon Jeon18edf452013-10-09 09:12:21 -0600234
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530235u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
236 size_t size);
237void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
238 size_t size, u32 val);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530239int dw_pcie_link_up(struct dw_pcie *pci);
240int dw_pcie_wait_for_link(struct dw_pcie *pci);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530241void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
242 int type, u64 cpu_addr, u64 pci_addr,
243 u32 size);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530244int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
245 u64 cpu_addr, enum dw_pcie_as_type as_type);
246void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
247 enum dw_pcie_region_type type);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530248void dw_pcie_setup(struct dw_pcie *pci);
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530249
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530250static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
251{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530252 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530253}
254
255static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
256{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530257 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530258}
259
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530260static inline void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val)
261{
262 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val);
263}
264
265static inline u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg)
266{
267 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2);
268}
269
270static inline void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val)
271{
272 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val);
273}
274
275static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg)
276{
277 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1);
278}
279
280static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val)
281{
282 __dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, val);
283}
284
285static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg)
286{
287 return __dw_pcie_read_dbi(pci, pci->dbi_base2, reg, 0x4);
288}
289
Hou Zhiqiange44abfe2017-08-28 18:52:59 +0800290static inline void dw_pcie_dbi_ro_wr_en(struct dw_pcie *pci)
291{
292 u32 reg;
293 u32 val;
294
295 reg = PCIE_MISC_CONTROL_1_OFF;
296 val = dw_pcie_readl_dbi(pci, reg);
297 val |= PCIE_DBI_RO_WR_EN;
298 dw_pcie_writel_dbi(pci, reg, val);
299}
300
301static inline void dw_pcie_dbi_ro_wr_dis(struct dw_pcie *pci)
302{
303 u32 reg;
304 u32 val;
305
306 reg = PCIE_MISC_CONTROL_1_OFF;
307 val = dw_pcie_readl_dbi(pci, reg);
308 val &= ~PCIE_DBI_RO_WR_EN;
309 dw_pcie_writel_dbi(pci, reg, val);
310}
311
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530312#ifdef CONFIG_PCIE_DW_HOST
313irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
314void dw_pcie_msi_init(struct pcie_port *pp);
315void dw_pcie_setup_rc(struct pcie_port *pp);
316int dw_pcie_host_init(struct pcie_port *pp);
317#else
318static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
319{
320 return IRQ_NONE;
321}
322
323static inline void dw_pcie_msi_init(struct pcie_port *pp)
324{
325}
326
327static inline void dw_pcie_setup_rc(struct pcie_port *pp)
328{
329}
330
331static inline int dw_pcie_host_init(struct pcie_port *pp)
332{
333 return 0;
334}
335#endif
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530336
337#ifdef CONFIG_PCIE_DW_EP
338void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
339int dw_pcie_ep_init(struct dw_pcie_ep *ep);
340void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
341#else
342static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
343{
344}
345
346static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep)
347{
348 return 0;
349}
350
351static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
352{
353}
354#endif
Seungwon Jeon18edf452013-10-09 09:12:21 -0600355#endif /* _PCIE_DESIGNWARE_H */