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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
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530116struct pcie_port;
117struct dw_pcie;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530118struct dw_pcie_ep;
119
120enum dw_pcie_region_type {
121 DW_PCIE_REGION_UNKNOWN,
122 DW_PCIE_REGION_INBOUND,
123 DW_PCIE_REGION_OUTBOUND,
124};
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530125
Kishon Vijay Abraham I608793e2017-03-27 15:15:08 +0530126enum dw_pcie_device_mode {
127 DW_PCIE_UNKNOWN_TYPE,
128 DW_PCIE_EP_TYPE,
129 DW_PCIE_LEG_EP_TYPE,
130 DW_PCIE_RC_TYPE,
131};
132
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530133struct dw_pcie_host_ops {
134 int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
135 int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
136 int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
137 unsigned int devfn, int where, int size, u32 *val);
138 int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
139 unsigned int devfn, int where, int size, u32 val);
Bjorn Andersson4a301762017-07-15 23:39:45 -0700140 int (*host_init)(struct pcie_port *pp);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530141 void (*msi_set_irq)(struct pcie_port *pp, int irq);
142 void (*msi_clear_irq)(struct pcie_port *pp, int irq);
143 phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
144 u32 (*get_msi_data)(struct pcie_port *pp, int pos);
145 void (*scan_bus)(struct pcie_port *pp);
146 int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
147};
148
Jingoo Han4b1ced82013-07-31 17:14:10 +0900149struct pcie_port {
Jingoo Han4b1ced82013-07-31 17:14:10 +0900150 u8 root_bus_nr;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900151 u64 cfg0_base;
152 void __iomem *va_cfg0_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600153 u32 cfg0_size;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900154 u64 cfg1_base;
155 void __iomem *va_cfg1_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600156 u32 cfg1_size;
Zhou Wang0021d222015-10-29 19:57:06 -0500157 resource_size_t io_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600158 phys_addr_t io_bus_addr;
159 u32 io_size;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900160 u64 mem_base;
Pratyush Anandadf70fc2014-09-05 17:48:54 -0600161 phys_addr_t mem_bus_addr;
162 u32 mem_size;
Zhou Wang0021d222015-10-29 19:57:06 -0500163 struct resource *cfg;
164 struct resource *io;
165 struct resource *mem;
166 struct resource *busn;
Jingoo Han4b1ced82013-07-31 17:14:10 +0900167 int irq;
Jisheng Zhang4ab2e7c2017-06-05 16:53:46 +0800168 const struct dw_pcie_host_ops *ops;
Jingoo Hanf342d942013-09-06 15:54:59 +0900169 int msi_irq;
Pratyush Anand904d0e72013-10-09 21:32:12 +0900170 struct irq_domain *irq_domain;
Jingoo Hanf342d942013-09-06 15:54:59 +0900171 unsigned long msi_data;
172 DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
Jingoo Han4b1ced82013-07-31 17:14:10 +0900173};
174
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530175enum dw_pcie_as_type {
176 DW_PCIE_AS_UNKNOWN,
177 DW_PCIE_AS_MEM,
178 DW_PCIE_AS_IO,
179};
180
181struct dw_pcie_ep_ops {
182 void (*ep_init)(struct dw_pcie_ep *ep);
183 int (*raise_irq)(struct dw_pcie_ep *ep, enum pci_epc_irq_type type,
184 u8 interrupt_num);
185};
186
187struct dw_pcie_ep {
188 struct pci_epc *epc;
189 struct dw_pcie_ep_ops *ops;
190 phys_addr_t phys_base;
191 size_t addr_size;
Kishon Vijay Abraham Ia937fe02017-08-18 20:28:02 +0530192 size_t page_size;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530193 u8 bar_to_atu[6];
194 phys_addr_t *outbound_addr;
195 unsigned long ib_window_map;
196 unsigned long ob_window_map;
197 u32 num_ib_windows;
198 u32 num_ob_windows;
199};
200
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530201struct dw_pcie_ops {
Kishon Vijay Abraham Ia6600832017-03-13 19:13:22 +0530202 u64 (*cpu_addr_fixup)(u64 cpu_addr);
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530203 u32 (*read_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
204 size_t size);
205 void (*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
206 size_t size, u32 val);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530207 int (*link_up)(struct dw_pcie *pcie);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530208 int (*start_link)(struct dw_pcie *pcie);
209 void (*stop_link)(struct dw_pcie *pcie);
Jingoo Han4b1ced82013-07-31 17:14:10 +0900210};
211
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530212struct dw_pcie {
213 struct device *dev;
214 void __iomem *dbi_base;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530215 void __iomem *dbi_base2;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530216 u32 num_viewport;
217 u8 iatu_unroll_enabled;
218 struct pcie_port pp;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530219 struct dw_pcie_ep ep;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530220 const struct dw_pcie_ops *ops;
221};
222
223#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
224
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530225#define to_dw_pcie_from_ep(endpoint) \
226 container_of((endpoint), struct dw_pcie, ep)
227
Kishon Vijay Abraham I19ce01cc2017-02-15 18:48:12 +0530228int dw_pcie_read(void __iomem *addr, int size, u32 *val);
229int dw_pcie_write(void __iomem *addr, int size, u32 val);
Seungwon Jeon18edf452013-10-09 09:12:21 -0600230
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530231u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
232 size_t size);
233void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
234 size_t size, u32 val);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530235int dw_pcie_link_up(struct dw_pcie *pci);
236int dw_pcie_wait_for_link(struct dw_pcie *pci);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530237void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
238 int type, u64 cpu_addr, u64 pci_addr,
239 u32 size);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530240int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
241 u64 cpu_addr, enum dw_pcie_as_type as_type);
242void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
243 enum dw_pcie_region_type type);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530244void dw_pcie_setup(struct dw_pcie *pci);
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530245
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530246static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
247{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530248 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530249}
250
251static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
252{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530253 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530254}
255
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530256static inline void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val)
257{
258 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val);
259}
260
261static inline u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg)
262{
263 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2);
264}
265
266static inline void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val)
267{
268 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val);
269}
270
271static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg)
272{
273 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1);
274}
275
276static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val)
277{
278 __dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, val);
279}
280
281static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg)
282{
283 return __dw_pcie_read_dbi(pci, pci->dbi_base2, reg, 0x4);
284}
285
Hou Zhiqiange44abfe2017-08-28 18:52:59 +0800286static inline void dw_pcie_dbi_ro_wr_en(struct dw_pcie *pci)
287{
288 u32 reg;
289 u32 val;
290
291 reg = PCIE_MISC_CONTROL_1_OFF;
292 val = dw_pcie_readl_dbi(pci, reg);
293 val |= PCIE_DBI_RO_WR_EN;
294 dw_pcie_writel_dbi(pci, reg, val);
295}
296
297static inline void dw_pcie_dbi_ro_wr_dis(struct dw_pcie *pci)
298{
299 u32 reg;
300 u32 val;
301
302 reg = PCIE_MISC_CONTROL_1_OFF;
303 val = dw_pcie_readl_dbi(pci, reg);
304 val &= ~PCIE_DBI_RO_WR_EN;
305 dw_pcie_writel_dbi(pci, reg, val);
306}
307
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530308#ifdef CONFIG_PCIE_DW_HOST
309irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
310void dw_pcie_msi_init(struct pcie_port *pp);
311void dw_pcie_setup_rc(struct pcie_port *pp);
312int dw_pcie_host_init(struct pcie_port *pp);
313#else
314static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
315{
316 return IRQ_NONE;
317}
318
319static inline void dw_pcie_msi_init(struct pcie_port *pp)
320{
321}
322
323static inline void dw_pcie_setup_rc(struct pcie_port *pp)
324{
325}
326
327static inline int dw_pcie_host_init(struct pcie_port *pp)
328{
329 return 0;
330}
331#endif
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530332
333#ifdef CONFIG_PCIE_DW_EP
334void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
335int dw_pcie_ep_init(struct dw_pcie_ep *ep);
336void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
337#else
338static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
339{
340}
341
342static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep)
343{
344 return 0;
345}
346
347static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
348{
349}
350#endif
Seungwon Jeon18edf452013-10-09 09:12:21 -0600351#endif /* _PCIE_DESIGNWARE_H */