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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
Niklas Cassel111111a2017-12-20 00:29:22 +010017#include <linux/dma-mapping.h>
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +053018#include <linux/irq.h>
19#include <linux/msi.h>
20#include <linux/pci.h>
21
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +053022#include <linux/pci-epc.h>
23#include <linux/pci-epf.h>
24
Kishon Vijay Abraham Ib90dc392017-02-15 18:48:10 +053025/* Parameters for the waiting for link up routine */
26#define LINK_WAIT_MAX_RETRIES 10
27#define LINK_WAIT_USLEEP_MIN 90000
28#define LINK_WAIT_USLEEP_MAX 100000
29
30/* Parameters for the waiting for iATU enabled routine */
31#define LINK_WAIT_MAX_IATU_RETRIES 5
32#define LINK_WAIT_IATU_MIN 9000
33#define LINK_WAIT_IATU_MAX 10000
34
35/* Synopsys-specific PCIe configuration registers */
36#define PCIE_PORT_LINK_CONTROL 0x710
37#define PORT_LINK_MODE_MASK (0x3f << 16)
38#define PORT_LINK_MODE_1_LANES (0x1 << 16)
39#define PORT_LINK_MODE_2_LANES (0x3 << 16)
40#define PORT_LINK_MODE_4_LANES (0x7 << 16)
41#define PORT_LINK_MODE_8_LANES (0xf << 16)
42
43#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
44#define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
45#define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8)
46#define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
47#define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
48#define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
49#define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
50
51#define PCIE_MSI_ADDR_LO 0x820
52#define PCIE_MSI_ADDR_HI 0x824
53#define PCIE_MSI_INTR0_ENABLE 0x828
54#define PCIE_MSI_INTR0_MASK 0x82C
55#define PCIE_MSI_INTR0_STATUS 0x830
56
57#define PCIE_ATU_VIEWPORT 0x900
58#define PCIE_ATU_REGION_INBOUND (0x1 << 31)
59#define PCIE_ATU_REGION_OUTBOUND (0x0 << 31)
60#define PCIE_ATU_REGION_INDEX2 (0x2 << 0)
61#define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
62#define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
63#define PCIE_ATU_CR1 0x904
64#define PCIE_ATU_TYPE_MEM (0x0 << 0)
65#define PCIE_ATU_TYPE_IO (0x2 << 0)
66#define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
67#define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
68#define PCIE_ATU_CR2 0x908
69#define PCIE_ATU_ENABLE (0x1 << 31)
70#define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
71#define PCIE_ATU_LOWER_BASE 0x90C
72#define PCIE_ATU_UPPER_BASE 0x910
73#define PCIE_ATU_LIMIT 0x914
74#define PCIE_ATU_LOWER_TARGET 0x918
75#define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
76#define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
77#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
78#define PCIE_ATU_UPPER_TARGET 0x91C
79
Hou Zhiqiange44abfe2017-08-28 18:52:59 +080080#define PCIE_MISC_CONTROL_1_OFF 0x8BC
81#define PCIE_DBI_RO_WR_EN (0x1 << 0)
82
Kishon Vijay Abraham Ib90dc392017-02-15 18:48:10 +053083/*
84 * iATU Unroll-specific register definitions
85 * From 4.80 core version the address translation will be made by unroll
86 */
87#define PCIE_ATU_UNR_REGION_CTRL1 0x00
88#define PCIE_ATU_UNR_REGION_CTRL2 0x04
89#define PCIE_ATU_UNR_LOWER_BASE 0x08
90#define PCIE_ATU_UNR_UPPER_BASE 0x0C
91#define PCIE_ATU_UNR_LIMIT 0x10
92#define PCIE_ATU_UNR_LOWER_TARGET 0x14
93#define PCIE_ATU_UNR_UPPER_TARGET 0x18
94
95/* Register address builder */
96#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \
97 ((0x3 << 20) | ((region) << 9))
98
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +053099#define PCIE_GET_ATU_INB_UNR_REG_OFFSET(region) \
100 ((0x3 << 20) | ((region) << 9) | (0x1 << 8))
101
102#define MSI_MESSAGE_CONTROL 0x52
103#define MSI_CAP_MMC_SHIFT 1
Niklas Cassel099a95f2017-12-20 00:29:23 +0100104#define MSI_CAP_MMC_MASK (7 << MSI_CAP_MMC_SHIFT)
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530105#define MSI_CAP_MME_SHIFT 4
106#define MSI_CAP_MME_MASK (7 << MSI_CAP_MME_SHIFT)
107#define MSI_MESSAGE_ADDR_L32 0x54
108#define MSI_MESSAGE_ADDR_U32 0x58
Niklas Cassel6f6d7872017-12-20 00:29:27 +0100109#define MSI_MESSAGE_DATA_32 0x58
110#define MSI_MESSAGE_DATA_64 0x5C
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530111
Jingoo Hanf342d942013-09-06 15:54:59 +0900112/*
113 * Maximum number of MSI IRQs can be 256 per controller. But keep
114 * it 32 as of now. Probably we will never need more than 32. If needed,
115 * then increment it in multiple of 32.
116 */
117#define MAX_MSI_IRQS 32
118#define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32)
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;
Niklas Cassel111111a2017-12-20 00:29:22 +0100175 dma_addr_t msi_data;
Jingoo Hanf342d942013-09-06 15:54:59 +0900176 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;
199 unsigned long ib_window_map;
200 unsigned long ob_window_map;
201 u32 num_ib_windows;
202 u32 num_ob_windows;
Niklas Cassel2fd0c9d2017-12-20 00:29:25 +0100203 void __iomem *msi_mem;
204 phys_addr_t msi_mem_phys;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530205};
206
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530207struct dw_pcie_ops {
Niklas Casselb6900ae2017-12-20 00:29:36 +0100208 u64 (*cpu_addr_fixup)(struct dw_pcie *pcie, u64 cpu_addr);
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530209 u32 (*read_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
210 size_t size);
211 void (*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg,
212 size_t size, u32 val);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530213 int (*link_up)(struct dw_pcie *pcie);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530214 int (*start_link)(struct dw_pcie *pcie);
215 void (*stop_link)(struct dw_pcie *pcie);
Jingoo Han4b1ced82013-07-31 17:14:10 +0900216};
217
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530218struct dw_pcie {
219 struct device *dev;
220 void __iomem *dbi_base;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530221 void __iomem *dbi_base2;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530222 u32 num_viewport;
223 u8 iatu_unroll_enabled;
224 struct pcie_port pp;
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530225 struct dw_pcie_ep ep;
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530226 const struct dw_pcie_ops *ops;
227};
228
229#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
230
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530231#define to_dw_pcie_from_ep(endpoint) \
232 container_of((endpoint), struct dw_pcie, ep)
233
Kishon Vijay Abraham I19ce01cc2017-02-15 18:48:12 +0530234int dw_pcie_read(void __iomem *addr, int size, u32 *val);
235int dw_pcie_write(void __iomem *addr, int size, u32 val);
Seungwon Jeon18edf452013-10-09 09:12:21 -0600236
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530237u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
238 size_t size);
239void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
240 size_t size, u32 val);
Kishon Vijay Abraham I442ec4c2017-02-15 18:48:14 +0530241int dw_pcie_link_up(struct dw_pcie *pci);
242int dw_pcie_wait_for_link(struct dw_pcie *pci);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530243void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
244 int type, u64 cpu_addr, u64 pci_addr,
245 u32 size);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530246int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int bar,
247 u64 cpu_addr, enum dw_pcie_as_type as_type);
248void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
249 enum dw_pcie_region_type type);
Kishon Vijay Abraham Ifeb85d92017-02-15 18:48:17 +0530250void dw_pcie_setup(struct dw_pcie *pci);
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530251
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530252static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
253{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530254 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x4, val);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530255}
256
257static inline u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
258{
Kishon Vijay Abraham Ia509d7d2017-03-13 19:13:26 +0530259 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x4);
Kishon Vijay Abraham Ib50b2db2017-03-13 19:13:25 +0530260}
261
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530262static inline void dw_pcie_writew_dbi(struct dw_pcie *pci, u32 reg, u16 val)
263{
264 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x2, val);
265}
266
267static inline u16 dw_pcie_readw_dbi(struct dw_pcie *pci, u32 reg)
268{
269 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x2);
270}
271
272static inline void dw_pcie_writeb_dbi(struct dw_pcie *pci, u32 reg, u8 val)
273{
274 __dw_pcie_write_dbi(pci, pci->dbi_base, reg, 0x1, val);
275}
276
277static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg)
278{
279 return __dw_pcie_read_dbi(pci, pci->dbi_base, reg, 0x1);
280}
281
282static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val)
283{
284 __dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, val);
285}
286
287static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg)
288{
289 return __dw_pcie_read_dbi(pci, pci->dbi_base2, reg, 0x4);
290}
291
Hou Zhiqiange44abfe2017-08-28 18:52:59 +0800292static inline void dw_pcie_dbi_ro_wr_en(struct dw_pcie *pci)
293{
294 u32 reg;
295 u32 val;
296
297 reg = PCIE_MISC_CONTROL_1_OFF;
298 val = dw_pcie_readl_dbi(pci, reg);
299 val |= PCIE_DBI_RO_WR_EN;
300 dw_pcie_writel_dbi(pci, reg, val);
301}
302
303static inline void dw_pcie_dbi_ro_wr_dis(struct dw_pcie *pci)
304{
305 u32 reg;
306 u32 val;
307
308 reg = PCIE_MISC_CONTROL_1_OFF;
309 val = dw_pcie_readl_dbi(pci, reg);
310 val &= ~PCIE_DBI_RO_WR_EN;
311 dw_pcie_writel_dbi(pci, reg, val);
312}
313
Kishon Vijay Abraham Ia0560202017-02-15 18:48:18 +0530314#ifdef CONFIG_PCIE_DW_HOST
315irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
316void dw_pcie_msi_init(struct pcie_port *pp);
317void dw_pcie_setup_rc(struct pcie_port *pp);
318int dw_pcie_host_init(struct pcie_port *pp);
319#else
320static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
321{
322 return IRQ_NONE;
323}
324
325static inline void dw_pcie_msi_init(struct pcie_port *pp)
326{
327}
328
329static inline void dw_pcie_setup_rc(struct pcie_port *pp)
330{
331}
332
333static inline int dw_pcie_host_init(struct pcie_port *pp)
334{
335 return 0;
336}
337#endif
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530338
339#ifdef CONFIG_PCIE_DW_EP
340void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
341int dw_pcie_ep_init(struct dw_pcie_ep *ep);
342void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
Niklas Cassel6f6d7872017-12-20 00:29:27 +0100343int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 interrupt_num);
Niklas Cassel9e718112017-12-20 00:29:26 +0100344void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar);
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530345#else
346static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
347{
348}
349
350static inline int dw_pcie_ep_init(struct dw_pcie_ep *ep)
351{
352 return 0;
353}
354
355static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
356{
357}
Niklas Cassel9e718112017-12-20 00:29:26 +0100358
Niklas Cassel6f6d7872017-12-20 00:29:27 +0100359static inline int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep,
360 u8 interrupt_num)
361{
362 return 0;
363}
364
Niklas Cassel9e718112017-12-20 00:29:26 +0100365static inline void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
366{
367}
Kishon Vijay Abraham If8aed6e2017-03-27 15:15:05 +0530368#endif
Seungwon Jeon18edf452013-10-09 09:12:21 -0600369#endif /* _PCIE_DESIGNWARE_H */