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0e37f88d MR |
1 | /* |
2 | * Allwinner A1X SoCs pinctrl driver. | |
3 | * | |
4 | * Copyright (C) 2012 Maxime Ripard | |
5 | * | |
6 | * Maxime Ripard <maxime.ripard@free-electrons.com> | |
7 | * | |
8 | * This file is licensed under the terms of the GNU General Public | |
9 | * License version 2. This program is licensed "as is" without any | |
10 | * warranty of any kind, whether express or implied. | |
11 | */ | |
12 | ||
13 | #ifndef __PINCTRL_SUNXI_H | |
14 | #define __PINCTRL_SUNXI_H | |
15 | ||
16 | #include <linux/kernel.h> | |
1bee963d | 17 | #include <linux/spinlock.h> |
0e37f88d MR |
18 | |
19 | #define PA_BASE 0 | |
20 | #define PB_BASE 32 | |
21 | #define PC_BASE 64 | |
22 | #define PD_BASE 96 | |
23 | #define PE_BASE 128 | |
24 | #define PF_BASE 160 | |
25 | #define PG_BASE 192 | |
9f5b6b30 MR |
26 | #define PH_BASE 224 |
27 | #define PI_BASE 256 | |
0aba6178 BB |
28 | #define PL_BASE 352 |
29 | #define PM_BASE 384 | |
4f6bd5cf | 30 | #define PN_BASE 416 |
0e37f88d | 31 | |
d10acc63 MR |
32 | #define SUNXI_PINCTRL_PIN(bank, pin) \ |
33 | PINCTRL_PIN(P ## bank ## _BASE + (pin), "P" #bank #pin) | |
0aba6178 | 34 | |
08e9e614 MR |
35 | #define SUNXI_PIN_NAME_MAX_LEN 5 |
36 | ||
0e37f88d MR |
37 | #define BANK_MEM_SIZE 0x24 |
38 | #define MUX_REGS_OFFSET 0x0 | |
08e9e614 | 39 | #define DATA_REGS_OFFSET 0x10 |
0e37f88d MR |
40 | #define DLEVEL_REGS_OFFSET 0x14 |
41 | #define PULL_REGS_OFFSET 0x1c | |
42 | ||
43 | #define PINS_PER_BANK 32 | |
44 | #define MUX_PINS_PER_REG 8 | |
45 | #define MUX_PINS_BITS 4 | |
46 | #define MUX_PINS_MASK 0x0f | |
08e9e614 MR |
47 | #define DATA_PINS_PER_REG 32 |
48 | #define DATA_PINS_BITS 1 | |
49 | #define DATA_PINS_MASK 0x01 | |
0e37f88d MR |
50 | #define DLEVEL_PINS_PER_REG 16 |
51 | #define DLEVEL_PINS_BITS 2 | |
52 | #define DLEVEL_PINS_MASK 0x03 | |
53 | #define PULL_PINS_PER_REG 16 | |
54 | #define PULL_PINS_BITS 2 | |
55 | #define PULL_PINS_MASK 0x03 | |
56 | ||
aebdc8ab | 57 | #define IRQ_PER_BANK 32 |
60242db1 MR |
58 | |
59 | #define IRQ_CFG_REG 0x200 | |
60 | #define IRQ_CFG_IRQ_PER_REG 8 | |
61 | #define IRQ_CFG_IRQ_BITS 4 | |
62 | #define IRQ_CFG_IRQ_MASK ((1 << IRQ_CFG_IRQ_BITS) - 1) | |
63 | #define IRQ_CTRL_REG 0x210 | |
64 | #define IRQ_CTRL_IRQ_PER_REG 32 | |
65 | #define IRQ_CTRL_IRQ_BITS 1 | |
66 | #define IRQ_CTRL_IRQ_MASK ((1 << IRQ_CTRL_IRQ_BITS) - 1) | |
67 | #define IRQ_STATUS_REG 0x214 | |
68 | #define IRQ_STATUS_IRQ_PER_REG 32 | |
69 | #define IRQ_STATUS_IRQ_BITS 1 | |
70 | #define IRQ_STATUS_IRQ_MASK ((1 << IRQ_STATUS_IRQ_BITS) - 1) | |
71 | ||
aebdc8ab MR |
72 | #define IRQ_MEM_SIZE 0x20 |
73 | ||
60242db1 MR |
74 | #define IRQ_EDGE_RISING 0x00 |
75 | #define IRQ_EDGE_FALLING 0x01 | |
76 | #define IRQ_LEVEL_HIGH 0x02 | |
77 | #define IRQ_LEVEL_LOW 0x03 | |
78 | #define IRQ_EDGE_BOTH 0x04 | |
79 | ||
ef6d24cc HG |
80 | #define SUN4I_FUNC_INPUT 0 |
81 | #define SUN4I_FUNC_IRQ 6 | |
82 | ||
0e37f88d MR |
83 | struct sunxi_desc_function { |
84 | const char *name; | |
85 | u8 muxval; | |
6e1c3023 | 86 | u8 irqbank; |
60242db1 | 87 | u8 irqnum; |
0e37f88d MR |
88 | }; |
89 | ||
90 | struct sunxi_desc_pin { | |
91 | struct pinctrl_pin_desc pin; | |
92 | struct sunxi_desc_function *functions; | |
93 | }; | |
94 | ||
95 | struct sunxi_pinctrl_desc { | |
96 | const struct sunxi_desc_pin *pins; | |
97 | int npins; | |
d83c82ce | 98 | unsigned pin_base; |
8966ada2 | 99 | unsigned irq_banks; |
ef6d24cc | 100 | bool irq_read_needs_mux; |
0e37f88d MR |
101 | }; |
102 | ||
103 | struct sunxi_pinctrl_function { | |
104 | const char *name; | |
105 | const char **groups; | |
106 | unsigned ngroups; | |
107 | }; | |
108 | ||
109 | struct sunxi_pinctrl_group { | |
110 | const char *name; | |
111 | unsigned long config; | |
112 | unsigned pin; | |
113 | }; | |
114 | ||
115 | struct sunxi_pinctrl { | |
116 | void __iomem *membase; | |
08e9e614 | 117 | struct gpio_chip *chip; |
d39bd845 | 118 | const struct sunxi_pinctrl_desc *desc; |
0e37f88d | 119 | struct device *dev; |
60242db1 | 120 | struct irq_domain *domain; |
0e37f88d MR |
121 | struct sunxi_pinctrl_function *functions; |
122 | unsigned nfunctions; | |
123 | struct sunxi_pinctrl_group *groups; | |
124 | unsigned ngroups; | |
aebdc8ab MR |
125 | int *irq; |
126 | unsigned *irq_array; | |
1bee963d | 127 | spinlock_t lock; |
0e37f88d MR |
128 | struct pinctrl_dev *pctl_dev; |
129 | }; | |
130 | ||
131 | #define SUNXI_PIN(_pin, ...) \ | |
132 | { \ | |
133 | .pin = _pin, \ | |
134 | .functions = (struct sunxi_desc_function[]){ \ | |
135 | __VA_ARGS__, { } }, \ | |
136 | } | |
137 | ||
138 | #define SUNXI_FUNCTION(_val, _name) \ | |
139 | { \ | |
140 | .name = _name, \ | |
141 | .muxval = _val, \ | |
142 | } | |
143 | ||
60242db1 MR |
144 | #define SUNXI_FUNCTION_IRQ(_val, _irq) \ |
145 | { \ | |
146 | .name = "irq", \ | |
147 | .muxval = _val, \ | |
148 | .irqnum = _irq, \ | |
149 | } | |
150 | ||
6e1c3023 MR |
151 | #define SUNXI_FUNCTION_IRQ_BANK(_val, _bank, _irq) \ |
152 | { \ | |
153 | .name = "irq", \ | |
154 | .muxval = _val, \ | |
155 | .irqbank = _bank, \ | |
156 | .irqnum = _irq, \ | |
157 | } | |
158 | ||
0e37f88d MR |
159 | /* |
160 | * The sunXi PIO registers are organized as is: | |
161 | * 0x00 - 0x0c Muxing values. | |
162 | * 8 pins per register, each pin having a 4bits value | |
163 | * 0x10 Pin values | |
164 | * 32 bits per register, each pin corresponding to one bit | |
165 | * 0x14 - 0x18 Drive level | |
166 | * 16 pins per register, each pin having a 2bits value | |
167 | * 0x1c - 0x20 Pull-Up values | |
168 | * 16 pins per register, each pin having a 2bits value | |
169 | * | |
170 | * This is for the first bank. Each bank will have the same layout, | |
171 | * with an offset being a multiple of 0x24. | |
172 | * | |
173 | * The following functions calculate from the pin number the register | |
174 | * and the bit offset that we should access. | |
175 | */ | |
176 | static inline u32 sunxi_mux_reg(u16 pin) | |
177 | { | |
178 | u8 bank = pin / PINS_PER_BANK; | |
179 | u32 offset = bank * BANK_MEM_SIZE; | |
180 | offset += MUX_REGS_OFFSET; | |
181 | offset += pin % PINS_PER_BANK / MUX_PINS_PER_REG * 0x04; | |
182 | return round_down(offset, 4); | |
183 | } | |
184 | ||
185 | static inline u32 sunxi_mux_offset(u16 pin) | |
186 | { | |
187 | u32 pin_num = pin % MUX_PINS_PER_REG; | |
188 | return pin_num * MUX_PINS_BITS; | |
189 | } | |
190 | ||
08e9e614 MR |
191 | static inline u32 sunxi_data_reg(u16 pin) |
192 | { | |
193 | u8 bank = pin / PINS_PER_BANK; | |
194 | u32 offset = bank * BANK_MEM_SIZE; | |
195 | offset += DATA_REGS_OFFSET; | |
196 | offset += pin % PINS_PER_BANK / DATA_PINS_PER_REG * 0x04; | |
197 | return round_down(offset, 4); | |
198 | } | |
199 | ||
200 | static inline u32 sunxi_data_offset(u16 pin) | |
201 | { | |
202 | u32 pin_num = pin % DATA_PINS_PER_REG; | |
203 | return pin_num * DATA_PINS_BITS; | |
204 | } | |
205 | ||
0e37f88d MR |
206 | static inline u32 sunxi_dlevel_reg(u16 pin) |
207 | { | |
208 | u8 bank = pin / PINS_PER_BANK; | |
209 | u32 offset = bank * BANK_MEM_SIZE; | |
210 | offset += DLEVEL_REGS_OFFSET; | |
211 | offset += pin % PINS_PER_BANK / DLEVEL_PINS_PER_REG * 0x04; | |
212 | return round_down(offset, 4); | |
213 | } | |
214 | ||
215 | static inline u32 sunxi_dlevel_offset(u16 pin) | |
216 | { | |
217 | u32 pin_num = pin % DLEVEL_PINS_PER_REG; | |
218 | return pin_num * DLEVEL_PINS_BITS; | |
219 | } | |
220 | ||
221 | static inline u32 sunxi_pull_reg(u16 pin) | |
222 | { | |
223 | u8 bank = pin / PINS_PER_BANK; | |
224 | u32 offset = bank * BANK_MEM_SIZE; | |
225 | offset += PULL_REGS_OFFSET; | |
226 | offset += pin % PINS_PER_BANK / PULL_PINS_PER_REG * 0x04; | |
227 | return round_down(offset, 4); | |
228 | } | |
229 | ||
230 | static inline u32 sunxi_pull_offset(u16 pin) | |
231 | { | |
232 | u32 pin_num = pin % PULL_PINS_PER_REG; | |
233 | return pin_num * PULL_PINS_BITS; | |
234 | } | |
235 | ||
60242db1 MR |
236 | static inline u32 sunxi_irq_cfg_reg(u16 irq) |
237 | { | |
aebdc8ab MR |
238 | u8 bank = irq / IRQ_PER_BANK; |
239 | u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04; | |
240 | ||
241 | return IRQ_CFG_REG + bank * IRQ_MEM_SIZE + reg; | |
60242db1 MR |
242 | } |
243 | ||
244 | static inline u32 sunxi_irq_cfg_offset(u16 irq) | |
245 | { | |
246 | u32 irq_num = irq % IRQ_CFG_IRQ_PER_REG; | |
247 | return irq_num * IRQ_CFG_IRQ_BITS; | |
248 | } | |
249 | ||
aebdc8ab MR |
250 | static inline u32 sunxi_irq_ctrl_reg_from_bank(u8 bank) |
251 | { | |
252 | return IRQ_CTRL_REG + bank * IRQ_MEM_SIZE; | |
253 | } | |
254 | ||
60242db1 MR |
255 | static inline u32 sunxi_irq_ctrl_reg(u16 irq) |
256 | { | |
aebdc8ab MR |
257 | u8 bank = irq / IRQ_PER_BANK; |
258 | ||
259 | return sunxi_irq_ctrl_reg_from_bank(bank); | |
60242db1 MR |
260 | } |
261 | ||
262 | static inline u32 sunxi_irq_ctrl_offset(u16 irq) | |
263 | { | |
264 | u32 irq_num = irq % IRQ_CTRL_IRQ_PER_REG; | |
265 | return irq_num * IRQ_CTRL_IRQ_BITS; | |
266 | } | |
267 | ||
aebdc8ab MR |
268 | static inline u32 sunxi_irq_status_reg_from_bank(u8 bank) |
269 | { | |
270 | return IRQ_STATUS_REG + bank * IRQ_MEM_SIZE; | |
271 | } | |
272 | ||
60242db1 MR |
273 | static inline u32 sunxi_irq_status_reg(u16 irq) |
274 | { | |
aebdc8ab MR |
275 | u8 bank = irq / IRQ_PER_BANK; |
276 | ||
277 | return sunxi_irq_status_reg_from_bank(bank); | |
60242db1 MR |
278 | } |
279 | ||
280 | static inline u32 sunxi_irq_status_offset(u16 irq) | |
281 | { | |
282 | u32 irq_num = irq % IRQ_STATUS_IRQ_PER_REG; | |
283 | return irq_num * IRQ_STATUS_IRQ_BITS; | |
284 | } | |
285 | ||
2284ba6b MR |
286 | int sunxi_pinctrl_init(struct platform_device *pdev, |
287 | const struct sunxi_pinctrl_desc *desc); | |
288 | ||
0e37f88d | 289 | #endif /* __PINCTRL_SUNXI_H */ |