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6d2f5c27 JW |
1 | /* |
2 | * Driver for Nuvoton Technology Corporation w83667hg/w83677hg-i CIR | |
3 | * | |
4 | * Copyright (C) 2010 Jarod Wilson <jarod@redhat.com> | |
5 | * Copyright (C) 2009 Nuvoton PS Team | |
6 | * | |
7 | * Special thanks to Nuvoton for providing hardware, spec sheets and | |
8 | * sample code upon which portions of this driver are based. Indirect | |
9 | * thanks also to Maxim Levitsky, whose ene_ir driver this driver is | |
10 | * modeled after. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
25 | * USA | |
26 | */ | |
27 | ||
563cd5ce JP |
28 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
29 | ||
6d2f5c27 JW |
30 | #include <linux/kernel.h> |
31 | #include <linux/module.h> | |
32 | #include <linux/pnp.h> | |
33 | #include <linux/io.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/sched.h> | |
36 | #include <linux/slab.h> | |
6bda9644 | 37 | #include <media/rc-core.h> |
6d2f5c27 JW |
38 | #include <linux/pci_ids.h> |
39 | ||
40 | #include "nuvoton-cir.h" | |
41 | ||
b5cf725c HK |
42 | static const struct nvt_chip nvt_chips[] = { |
43 | { "w83667hg", NVT_W83667HG }, | |
44 | { "NCT6775F", NVT_6775F }, | |
45 | { "NCT6776F", NVT_6776F }, | |
d0b528d5 | 46 | { "NCT6779D", NVT_6779D }, |
b5cf725c HK |
47 | }; |
48 | ||
49 | static inline bool is_w83667hg(struct nvt_dev *nvt) | |
50 | { | |
51 | return nvt->chip_ver == NVT_W83667HG; | |
52 | } | |
53 | ||
6d2f5c27 JW |
54 | /* write val to config reg */ |
55 | static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg) | |
56 | { | |
57 | outb(reg, nvt->cr_efir); | |
58 | outb(val, nvt->cr_efdr); | |
59 | } | |
60 | ||
61 | /* read val from config reg */ | |
62 | static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg) | |
63 | { | |
64 | outb(reg, nvt->cr_efir); | |
65 | return inb(nvt->cr_efdr); | |
66 | } | |
67 | ||
68 | /* update config register bit without changing other bits */ | |
69 | static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
70 | { | |
71 | u8 tmp = nvt_cr_read(nvt, reg) | val; | |
72 | nvt_cr_write(nvt, tmp, reg); | |
73 | } | |
74 | ||
75 | /* clear config register bit without changing other bits */ | |
76 | static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
77 | { | |
78 | u8 tmp = nvt_cr_read(nvt, reg) & ~val; | |
79 | nvt_cr_write(nvt, tmp, reg); | |
80 | } | |
81 | ||
82 | /* enter extended function mode */ | |
3def9ad6 | 83 | static inline int nvt_efm_enable(struct nvt_dev *nvt) |
6d2f5c27 | 84 | { |
3def9ad6 HK |
85 | if (!request_muxed_region(nvt->cr_efir, 2, NVT_DRIVER_NAME)) |
86 | return -EBUSY; | |
87 | ||
6d2f5c27 JW |
88 | /* Enabling Extended Function Mode explicitly requires writing 2x */ |
89 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
90 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
3def9ad6 HK |
91 | |
92 | return 0; | |
6d2f5c27 JW |
93 | } |
94 | ||
95 | /* exit extended function mode */ | |
96 | static inline void nvt_efm_disable(struct nvt_dev *nvt) | |
97 | { | |
98 | outb(EFER_EFM_DISABLE, nvt->cr_efir); | |
3def9ad6 HK |
99 | |
100 | release_region(nvt->cr_efir, 2); | |
6d2f5c27 JW |
101 | } |
102 | ||
103 | /* | |
104 | * When you want to address a specific logical device, write its logical | |
105 | * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing | |
106 | * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN. | |
107 | */ | |
108 | static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev) | |
109 | { | |
7a89836e | 110 | nvt_cr_write(nvt, ldev, CR_LOGICAL_DEV_SEL); |
6d2f5c27 JW |
111 | } |
112 | ||
0890655c HK |
113 | /* select and enable logical device with setting EFM mode*/ |
114 | static inline void nvt_enable_logical_dev(struct nvt_dev *nvt, u8 ldev) | |
115 | { | |
116 | nvt_efm_enable(nvt); | |
117 | nvt_select_logical_dev(nvt, ldev); | |
118 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
119 | nvt_efm_disable(nvt); | |
120 | } | |
121 | ||
a17ede9a HK |
122 | /* select and disable logical device with setting EFM mode*/ |
123 | static inline void nvt_disable_logical_dev(struct nvt_dev *nvt, u8 ldev) | |
124 | { | |
125 | nvt_efm_enable(nvt); | |
126 | nvt_select_logical_dev(nvt, ldev); | |
127 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
128 | nvt_efm_disable(nvt); | |
129 | } | |
130 | ||
6d2f5c27 JW |
131 | /* write val to cir config register */ |
132 | static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset) | |
133 | { | |
134 | outb(val, nvt->cir_addr + offset); | |
135 | } | |
136 | ||
137 | /* read val from cir config register */ | |
138 | static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset) | |
139 | { | |
140 | u8 val; | |
141 | ||
142 | val = inb(nvt->cir_addr + offset); | |
143 | ||
144 | return val; | |
145 | } | |
146 | ||
147 | /* write val to cir wake register */ | |
148 | static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt, | |
149 | u8 val, u8 offset) | |
150 | { | |
151 | outb(val, nvt->cir_wake_addr + offset); | |
152 | } | |
153 | ||
154 | /* read val from cir wake config register */ | |
155 | static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset) | |
156 | { | |
157 | u8 val; | |
158 | ||
159 | val = inb(nvt->cir_wake_addr + offset); | |
160 | ||
161 | return val; | |
162 | } | |
163 | ||
164 | /* dump current cir register contents */ | |
165 | static void cir_dump_regs(struct nvt_dev *nvt) | |
166 | { | |
167 | nvt_efm_enable(nvt); | |
168 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
169 | ||
563cd5ce JP |
170 | pr_info("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME); |
171 | pr_info(" * CR CIR ACTIVE : 0x%x\n", | |
172 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); | |
173 | pr_info(" * CR CIR BASE ADDR: 0x%x\n", | |
174 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | | |
6d2f5c27 | 175 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); |
563cd5ce JP |
176 | pr_info(" * CR CIR IRQ NUM: 0x%x\n", |
177 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); | |
6d2f5c27 JW |
178 | |
179 | nvt_efm_disable(nvt); | |
180 | ||
563cd5ce JP |
181 | pr_info("%s: Dump CIR registers:\n", NVT_DRIVER_NAME); |
182 | pr_info(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON)); | |
183 | pr_info(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS)); | |
184 | pr_info(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN)); | |
185 | pr_info(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT)); | |
186 | pr_info(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP)); | |
187 | pr_info(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC)); | |
188 | pr_info(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH)); | |
189 | pr_info(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL)); | |
190 | pr_info(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON)); | |
191 | pr_info(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS)); | |
192 | pr_info(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO)); | |
193 | pr_info(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT)); | |
194 | pr_info(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO)); | |
195 | pr_info(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH)); | |
196 | pr_info(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL)); | |
197 | pr_info(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM)); | |
6d2f5c27 JW |
198 | } |
199 | ||
200 | /* dump current cir wake register contents */ | |
201 | static void cir_wake_dump_regs(struct nvt_dev *nvt) | |
202 | { | |
203 | u8 i, fifo_len; | |
204 | ||
205 | nvt_efm_enable(nvt); | |
206 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
207 | ||
563cd5ce JP |
208 | pr_info("%s: Dump CIR WAKE logical device registers:\n", |
209 | NVT_DRIVER_NAME); | |
210 | pr_info(" * CR CIR WAKE ACTIVE : 0x%x\n", | |
211 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); | |
212 | pr_info(" * CR CIR WAKE BASE ADDR: 0x%x\n", | |
213 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | | |
4e6e29ad | 214 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); |
563cd5ce JP |
215 | pr_info(" * CR CIR WAKE IRQ NUM: 0x%x\n", |
216 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); | |
6d2f5c27 JW |
217 | |
218 | nvt_efm_disable(nvt); | |
219 | ||
563cd5ce JP |
220 | pr_info("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME); |
221 | pr_info(" * IRCON: 0x%x\n", | |
222 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON)); | |
223 | pr_info(" * IRSTS: 0x%x\n", | |
224 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS)); | |
225 | pr_info(" * IREN: 0x%x\n", | |
226 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN)); | |
227 | pr_info(" * FIFO CMP DEEP: 0x%x\n", | |
228 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP)); | |
229 | pr_info(" * FIFO CMP TOL: 0x%x\n", | |
230 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL)); | |
231 | pr_info(" * FIFO COUNT: 0x%x\n", | |
232 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT)); | |
233 | pr_info(" * SLCH: 0x%x\n", | |
234 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH)); | |
235 | pr_info(" * SLCL: 0x%x\n", | |
236 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL)); | |
237 | pr_info(" * FIFOCON: 0x%x\n", | |
238 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON)); | |
239 | pr_info(" * SRXFSTS: 0x%x\n", | |
240 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS)); | |
241 | pr_info(" * SAMPLE RX FIFO: 0x%x\n", | |
242 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO)); | |
243 | pr_info(" * WR FIFO DATA: 0x%x\n", | |
244 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA)); | |
245 | pr_info(" * RD FIFO ONLY: 0x%x\n", | |
246 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); | |
247 | pr_info(" * RD FIFO ONLY IDX: 0x%x\n", | |
248 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)); | |
249 | pr_info(" * FIFO IGNORE: 0x%x\n", | |
250 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE)); | |
251 | pr_info(" * IRFSM: 0x%x\n", | |
252 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM)); | |
6d2f5c27 JW |
253 | |
254 | fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT); | |
563cd5ce JP |
255 | pr_info("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len); |
256 | pr_info("* Contents ="); | |
6d2f5c27 | 257 | for (i = 0; i < fifo_len; i++) |
563cd5ce JP |
258 | pr_cont(" %02x", |
259 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); | |
260 | pr_cont("\n"); | |
6d2f5c27 JW |
261 | } |
262 | ||
b5cf725c HK |
263 | static inline const char *nvt_find_chip(struct nvt_dev *nvt, int id) |
264 | { | |
265 | int i; | |
266 | ||
267 | for (i = 0; i < ARRAY_SIZE(nvt_chips); i++) | |
268 | if ((id & SIO_ID_MASK) == nvt_chips[i].chip_ver) { | |
269 | nvt->chip_ver = nvt_chips[i].chip_ver; | |
270 | return nvt_chips[i].name; | |
271 | } | |
272 | ||
273 | return NULL; | |
274 | } | |
275 | ||
276 | ||
6d2f5c27 | 277 | /* detect hardware features */ |
6a5a3360 | 278 | static void nvt_hw_detect(struct nvt_dev *nvt) |
6d2f5c27 | 279 | { |
b5cf725c HK |
280 | const char *chip_name; |
281 | int chip_id; | |
6d2f5c27 JW |
282 | |
283 | nvt_efm_enable(nvt); | |
284 | ||
285 | /* Check if we're wired for the alternate EFER setup */ | |
b5cf725c HK |
286 | nvt->chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); |
287 | if (nvt->chip_major == 0xff) { | |
6d2f5c27 JW |
288 | nvt->cr_efir = CR_EFIR2; |
289 | nvt->cr_efdr = CR_EFDR2; | |
290 | nvt_efm_enable(nvt); | |
b5cf725c | 291 | nvt->chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); |
6d2f5c27 JW |
292 | } |
293 | ||
b5cf725c HK |
294 | nvt->chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO); |
295 | ||
296 | chip_id = nvt->chip_major << 8 | nvt->chip_minor; | |
297 | chip_name = nvt_find_chip(nvt, chip_id); | |
6d2f5c27 | 298 | |
362d3a3a | 299 | /* warn, but still let the driver load, if we don't know this chip */ |
b5cf725c | 300 | if (!chip_name) |
211477fe HK |
301 | dev_warn(&nvt->pdev->dev, |
302 | "unknown chip, id: 0x%02x 0x%02x, it may not work...", | |
303 | nvt->chip_major, nvt->chip_minor); | |
362d3a3a | 304 | else |
af082334 HK |
305 | dev_info(&nvt->pdev->dev, |
306 | "found %s or compatible: chip id: 0x%02x 0x%02x", | |
307 | chip_name, nvt->chip_major, nvt->chip_minor); | |
362d3a3a | 308 | |
6d2f5c27 | 309 | nvt_efm_disable(nvt); |
6d2f5c27 JW |
310 | } |
311 | ||
312 | static void nvt_cir_ldev_init(struct nvt_dev *nvt) | |
313 | { | |
39381d4f JW |
314 | u8 val, psreg, psmask, psval; |
315 | ||
b5cf725c | 316 | if (is_w83667hg(nvt)) { |
39381d4f JW |
317 | psreg = CR_MULTIFUNC_PIN_SEL; |
318 | psmask = MULTIFUNC_PIN_SEL_MASK; | |
319 | psval = MULTIFUNC_ENABLE_CIR | MULTIFUNC_ENABLE_CIRWB; | |
320 | } else { | |
321 | psreg = CR_OUTPUT_PIN_SEL; | |
322 | psmask = OUTPUT_PIN_SEL_MASK; | |
323 | psval = OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB; | |
324 | } | |
6d2f5c27 | 325 | |
39381d4f JW |
326 | /* output pin selection: enable CIR, with WB sensor enabled */ |
327 | val = nvt_cr_read(nvt, psreg); | |
328 | val &= psmask; | |
329 | val |= psval; | |
330 | nvt_cr_write(nvt, val, psreg); | |
6d2f5c27 | 331 | |
ccca00d6 | 332 | /* Select CIR logical device */ |
6d2f5c27 | 333 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); |
6d2f5c27 JW |
334 | |
335 | nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
336 | nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
337 | ||
338 | nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC); | |
339 | ||
340 | nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d", | |
341 | nvt->cir_addr, nvt->cir_irq); | |
342 | } | |
343 | ||
344 | static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt) | |
345 | { | |
ccca00d6 | 346 | /* Select ACPI logical device and anable it */ |
6d2f5c27 JW |
347 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); |
348 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
349 | ||
350 | /* Enable CIR Wake via PSOUT# (Pin60) */ | |
351 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
352 | ||
6d2f5c27 JW |
353 | /* enable pme interrupt of cir wakeup event */ |
354 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
355 | ||
ccca00d6 | 356 | /* Select CIR Wake logical device */ |
6d2f5c27 | 357 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); |
6d2f5c27 JW |
358 | |
359 | nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
360 | nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
361 | ||
362 | nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC); | |
363 | ||
364 | nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d", | |
365 | nvt->cir_wake_addr, nvt->cir_wake_irq); | |
366 | } | |
367 | ||
368 | /* clear out the hardware's cir rx fifo */ | |
369 | static void nvt_clear_cir_fifo(struct nvt_dev *nvt) | |
370 | { | |
371 | u8 val; | |
372 | ||
373 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
374 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
375 | } | |
376 | ||
377 | /* clear out the hardware's cir wake rx fifo */ | |
378 | static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt) | |
379 | { | |
e1a7d981 HK |
380 | u8 val, config; |
381 | ||
382 | config = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON); | |
383 | ||
384 | /* clearing wake fifo works in learning mode only */ | |
385 | nvt_cir_wake_reg_write(nvt, config & ~CIR_WAKE_IRCON_MODE0, | |
386 | CIR_WAKE_IRCON); | |
6d2f5c27 JW |
387 | |
388 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON); | |
389 | nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR, | |
390 | CIR_WAKE_FIFOCON); | |
e1a7d981 HK |
391 | |
392 | nvt_cir_wake_reg_write(nvt, config, CIR_WAKE_IRCON); | |
6d2f5c27 JW |
393 | } |
394 | ||
395 | /* clear out the hardware's cir tx fifo */ | |
396 | static void nvt_clear_tx_fifo(struct nvt_dev *nvt) | |
397 | { | |
398 | u8 val; | |
399 | ||
400 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
401 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON); | |
402 | } | |
403 | ||
fbdc781c JW |
404 | /* enable RX Trigger Level Reach and Packet End interrupts */ |
405 | static void nvt_set_cir_iren(struct nvt_dev *nvt) | |
406 | { | |
407 | u8 iren; | |
408 | ||
409 | iren = CIR_IREN_RTR | CIR_IREN_PE; | |
410 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
411 | } | |
412 | ||
6d2f5c27 JW |
413 | static void nvt_cir_regs_init(struct nvt_dev *nvt) |
414 | { | |
415 | /* set sample limit count (PE interrupt raised when reached) */ | |
416 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH); | |
417 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL); | |
418 | ||
419 | /* set fifo irq trigger levels */ | |
420 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV | | |
421 | CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON); | |
422 | ||
423 | /* | |
424 | * Enable TX and RX, specify carrier on = low, off = high, and set | |
425 | * sample period (currently 50us) | |
426 | */ | |
4e6e29ad JW |
427 | nvt_cir_reg_write(nvt, |
428 | CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
429 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
430 | CIR_IRCON); | |
6d2f5c27 JW |
431 | |
432 | /* clear hardware rx and tx fifos */ | |
433 | nvt_clear_cir_fifo(nvt); | |
434 | nvt_clear_tx_fifo(nvt); | |
435 | ||
436 | /* clear any and all stray interrupts */ | |
437 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
438 | ||
fbdc781c JW |
439 | /* and finally, enable interrupts */ |
440 | nvt_set_cir_iren(nvt); | |
ccca00d6 HK |
441 | |
442 | /* enable the CIR logical device */ | |
443 | nvt_enable_logical_dev(nvt, LOGICAL_DEV_CIR); | |
6d2f5c27 JW |
444 | } |
445 | ||
446 | static void nvt_cir_wake_regs_init(struct nvt_dev *nvt) | |
447 | { | |
3198ed16 JW |
448 | /* set number of bytes needed for wake from s3 (default 65) */ |
449 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES, | |
450 | CIR_WAKE_FIFO_CMP_DEEP); | |
6d2f5c27 JW |
451 | |
452 | /* set tolerance/variance allowed per byte during wake compare */ | |
453 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE, | |
454 | CIR_WAKE_FIFO_CMP_TOL); | |
455 | ||
456 | /* set sample limit count (PE interrupt raised when reached) */ | |
457 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH); | |
458 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL); | |
459 | ||
460 | /* set cir wake fifo rx trigger level (currently 67) */ | |
461 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV, | |
462 | CIR_WAKE_FIFOCON); | |
463 | ||
464 | /* | |
465 | * Enable TX and RX, specific carrier on = low, off = high, and set | |
466 | * sample period (currently 50us) | |
467 | */ | |
468 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
469 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
470 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, | |
471 | CIR_WAKE_IRCON); | |
472 | ||
473 | /* clear cir wake rx fifo */ | |
474 | nvt_clear_cir_wake_fifo(nvt); | |
475 | ||
476 | /* clear any and all stray interrupts */ | |
477 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); | |
ccca00d6 HK |
478 | |
479 | /* enable the CIR WAKE logical device */ | |
480 | nvt_enable_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
6d2f5c27 JW |
481 | } |
482 | ||
483 | static void nvt_enable_wake(struct nvt_dev *nvt) | |
484 | { | |
485 | nvt_efm_enable(nvt); | |
486 | ||
487 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
488 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
6d2f5c27 JW |
489 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); |
490 | ||
491 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
492 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
493 | ||
494 | nvt_efm_disable(nvt); | |
495 | ||
496 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
497 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
4e6e29ad JW |
498 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, |
499 | CIR_WAKE_IRCON); | |
6d2f5c27 JW |
500 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); |
501 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
502 | } | |
503 | ||
230dc94a | 504 | #if 0 /* Currently unused */ |
6d2f5c27 JW |
505 | /* rx carrier detect only works in learning mode, must be called w/nvt_lock */ |
506 | static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt) | |
507 | { | |
508 | u32 count, carrier, duration = 0; | |
509 | int i; | |
510 | ||
511 | count = nvt_cir_reg_read(nvt, CIR_FCCL) | | |
512 | nvt_cir_reg_read(nvt, CIR_FCCH) << 8; | |
513 | ||
514 | for (i = 0; i < nvt->pkts; i++) { | |
515 | if (nvt->buf[i] & BUF_PULSE_BIT) | |
516 | duration += nvt->buf[i] & BUF_LEN_MASK; | |
517 | } | |
518 | ||
519 | duration *= SAMPLE_PERIOD; | |
520 | ||
521 | if (!count || !duration) { | |
211477fe HK |
522 | dev_notice(&nvt->pdev->dev, |
523 | "Unable to determine carrier! (c:%u, d:%u)", | |
524 | count, duration); | |
6d2f5c27 JW |
525 | return 0; |
526 | } | |
527 | ||
b4608fae | 528 | carrier = MS_TO_NS(count) / duration; |
6d2f5c27 JW |
529 | |
530 | if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER)) | |
531 | nvt_dbg("WTF? Carrier frequency out of range!"); | |
532 | ||
533 | nvt_dbg("Carrier frequency: %u (count %u, duration %u)", | |
534 | carrier, count, duration); | |
535 | ||
536 | return carrier; | |
537 | } | |
230dc94a | 538 | #endif |
6d2f5c27 JW |
539 | /* |
540 | * set carrier frequency | |
541 | * | |
542 | * set carrier on 2 registers: CP & CC | |
543 | * always set CP as 0x81 | |
544 | * set CC by SPEC, CC = 3MHz/carrier - 1 | |
545 | */ | |
d8b4b582 | 546 | static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier) |
6d2f5c27 | 547 | { |
d8b4b582 | 548 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
549 | u16 val; |
550 | ||
48cafec9 DC |
551 | if (carrier == 0) |
552 | return -EINVAL; | |
553 | ||
6d2f5c27 JW |
554 | nvt_cir_reg_write(nvt, 1, CIR_CP); |
555 | val = 3000000 / (carrier) - 1; | |
556 | nvt_cir_reg_write(nvt, val & 0xff, CIR_CC); | |
557 | ||
558 | nvt_dbg("cp: 0x%x cc: 0x%x\n", | |
559 | nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC)); | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
564 | /* | |
565 | * nvt_tx_ir | |
566 | * | |
567 | * 1) clean TX fifo first (handled by AP) | |
568 | * 2) copy data from user space | |
569 | * 3) disable RX interrupts, enable TX interrupts: TTR & TFU | |
570 | * 4) send 9 packets to TX FIFO to open TTR | |
571 | * in interrupt_handler: | |
572 | * 5) send all data out | |
573 | * go back to write(): | |
574 | * 6) disable TX interrupts, re-enable RX interupts | |
575 | * | |
576 | * The key problem of this function is user space data may larger than | |
577 | * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to | |
578 | * buf, and keep current copied data buf num in cur_buf_num. But driver's buf | |
579 | * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to | |
580 | * set TXFCONT as 0xff, until buf_count less than 0xff. | |
581 | */ | |
5588dc2b | 582 | static int nvt_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned n) |
6d2f5c27 | 583 | { |
d8b4b582 | 584 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 | 585 | unsigned long flags; |
6d2f5c27 JW |
586 | unsigned int i; |
587 | u8 iren; | |
588 | int ret; | |
589 | ||
590 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
591 | ||
5588dc2b DH |
592 | ret = min((unsigned)(TX_BUF_LEN / sizeof(unsigned)), n); |
593 | nvt->tx.buf_count = (ret * sizeof(unsigned)); | |
6d2f5c27 JW |
594 | |
595 | memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count); | |
596 | ||
597 | nvt->tx.cur_buf_num = 0; | |
598 | ||
599 | /* save currently enabled interrupts */ | |
600 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
601 | ||
602 | /* now disable all interrupts, save TFU & TTR */ | |
603 | nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN); | |
604 | ||
605 | nvt->tx.tx_state = ST_TX_REPLY; | |
606 | ||
607 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 | | |
608 | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
609 | ||
610 | /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */ | |
611 | for (i = 0; i < 9; i++) | |
612 | nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO); | |
613 | ||
614 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
615 | ||
616 | wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST); | |
617 | ||
618 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
619 | nvt->tx.tx_state = ST_TX_NONE; | |
620 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
621 | ||
622 | /* restore enabled interrupts to prior state */ | |
623 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
628 | /* dump contents of the last rx buffer we got from the hw rx fifo */ | |
629 | static void nvt_dump_rx_buf(struct nvt_dev *nvt) | |
630 | { | |
631 | int i; | |
632 | ||
4e6e29ad | 633 | printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts); |
6d2f5c27 | 634 | for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++) |
4e6e29ad JW |
635 | printk(KERN_CONT "0x%02x ", nvt->buf[i]); |
636 | printk(KERN_CONT "\n"); | |
6d2f5c27 JW |
637 | } |
638 | ||
639 | /* | |
640 | * Process raw data in rx driver buffer, store it in raw IR event kfifo, | |
641 | * trigger decode when appropriate. | |
642 | * | |
643 | * We get IR data samples one byte at a time. If the msb is set, its a pulse, | |
644 | * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD | |
645 | * (default 50us) intervals for that pulse/space. A discrete signal is | |
646 | * followed by a series of 0x7f packets, then either 0x7<something> or 0x80 | |
647 | * to signal more IR coming (repeats) or end of IR, respectively. We store | |
648 | * sample data in the raw event kfifo until we see 0x7<something> (except f) | |
649 | * or 0x80, at which time, we trigger a decode operation. | |
650 | */ | |
651 | static void nvt_process_rx_ir_data(struct nvt_dev *nvt) | |
652 | { | |
4651918a | 653 | DEFINE_IR_RAW_EVENT(rawir); |
6d2f5c27 JW |
654 | u8 sample; |
655 | int i; | |
656 | ||
657 | nvt_dbg_verbose("%s firing", __func__); | |
658 | ||
659 | if (debug) | |
660 | nvt_dump_rx_buf(nvt); | |
661 | ||
de4ed0c1 | 662 | nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts); |
6d2f5c27 | 663 | |
b7582815 JW |
664 | init_ir_raw_event(&rawir); |
665 | ||
de4ed0c1 | 666 | for (i = 0; i < nvt->pkts; i++) { |
6d2f5c27 JW |
667 | sample = nvt->buf[i]; |
668 | ||
669 | rawir.pulse = ((sample & BUF_PULSE_BIT) != 0); | |
b4608fae JW |
670 | rawir.duration = US_TO_NS((sample & BUF_LEN_MASK) |
671 | * SAMPLE_PERIOD); | |
6d2f5c27 | 672 | |
de4ed0c1 JW |
673 | nvt_dbg("Storing %s with duration %d", |
674 | rawir.pulse ? "pulse" : "space", rawir.duration); | |
4651918a | 675 | |
de4ed0c1 | 676 | ir_raw_event_store_with_filter(nvt->rdev, &rawir); |
6d2f5c27 JW |
677 | |
678 | /* | |
679 | * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE | |
680 | * indicates end of IR signal, but new data incoming. In both | |
681 | * cases, it means we're ready to call ir_raw_event_handle | |
682 | */ | |
de4ed0c1 | 683 | if ((sample == BUF_PULSE_BIT) && (i + 1 < nvt->pkts)) { |
b7582815 | 684 | nvt_dbg("Calling ir_raw_event_handle (signal end)\n"); |
6d2f5c27 | 685 | ir_raw_event_handle(nvt->rdev); |
b7582815 | 686 | } |
6d2f5c27 JW |
687 | } |
688 | ||
de4ed0c1 JW |
689 | nvt->pkts = 0; |
690 | ||
b7582815 JW |
691 | nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n"); |
692 | ir_raw_event_handle(nvt->rdev); | |
693 | ||
6d2f5c27 JW |
694 | nvt_dbg_verbose("%s done", __func__); |
695 | } | |
696 | ||
fbdc781c JW |
697 | static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt) |
698 | { | |
211477fe | 699 | dev_warn(&nvt->pdev->dev, "RX FIFO overrun detected, flushing data!"); |
fbdc781c JW |
700 | |
701 | nvt->pkts = 0; | |
702 | nvt_clear_cir_fifo(nvt); | |
703 | ir_raw_event_reset(nvt->rdev); | |
704 | } | |
705 | ||
6d2f5c27 JW |
706 | /* copy data from hardware rx fifo into driver buffer */ |
707 | static void nvt_get_rx_ir_data(struct nvt_dev *nvt) | |
708 | { | |
709 | unsigned long flags; | |
710 | u8 fifocount, val; | |
711 | unsigned int b_idx; | |
fbdc781c | 712 | bool overrun = false; |
6d2f5c27 JW |
713 | int i; |
714 | ||
715 | /* Get count of how many bytes to read from RX FIFO */ | |
716 | fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT); | |
717 | /* if we get 0xff, probably means the logical dev is disabled */ | |
718 | if (fifocount == 0xff) | |
719 | return; | |
fbdc781c | 720 | /* watch out for a fifo overrun condition */ |
6d2f5c27 | 721 | else if (fifocount > RX_BUF_LEN) { |
fbdc781c JW |
722 | overrun = true; |
723 | fifocount = RX_BUF_LEN; | |
6d2f5c27 JW |
724 | } |
725 | ||
726 | nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount); | |
727 | ||
728 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
729 | ||
730 | b_idx = nvt->pkts; | |
731 | ||
732 | /* This should never happen, but lets check anyway... */ | |
733 | if (b_idx + fifocount > RX_BUF_LEN) { | |
734 | nvt_process_rx_ir_data(nvt); | |
735 | b_idx = 0; | |
736 | } | |
737 | ||
738 | /* Read fifocount bytes from CIR Sample RX FIFO register */ | |
739 | for (i = 0; i < fifocount; i++) { | |
740 | val = nvt_cir_reg_read(nvt, CIR_SRXFIFO); | |
741 | nvt->buf[b_idx + i] = val; | |
742 | } | |
743 | ||
744 | nvt->pkts += fifocount; | |
745 | nvt_dbg("%s: pkts now %d", __func__, nvt->pkts); | |
746 | ||
747 | nvt_process_rx_ir_data(nvt); | |
748 | ||
fbdc781c JW |
749 | if (overrun) |
750 | nvt_handle_rx_fifo_overrun(nvt); | |
751 | ||
6d2f5c27 JW |
752 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); |
753 | } | |
754 | ||
755 | static void nvt_cir_log_irqs(u8 status, u8 iren) | |
756 | { | |
068fb7dd | 757 | nvt_dbg("IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s", |
6d2f5c27 JW |
758 | status, iren, |
759 | status & CIR_IRSTS_RDR ? " RDR" : "", | |
760 | status & CIR_IRSTS_RTR ? " RTR" : "", | |
761 | status & CIR_IRSTS_PE ? " PE" : "", | |
762 | status & CIR_IRSTS_RFO ? " RFO" : "", | |
763 | status & CIR_IRSTS_TE ? " TE" : "", | |
764 | status & CIR_IRSTS_TTR ? " TTR" : "", | |
765 | status & CIR_IRSTS_TFU ? " TFU" : "", | |
766 | status & CIR_IRSTS_GH ? " GH" : "", | |
767 | status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE | | |
768 | CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR | | |
769 | CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : ""); | |
770 | } | |
771 | ||
772 | static bool nvt_cir_tx_inactive(struct nvt_dev *nvt) | |
773 | { | |
774 | unsigned long flags; | |
6d2f5c27 JW |
775 | u8 tx_state; |
776 | ||
777 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
778 | tx_state = nvt->tx.tx_state; | |
779 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
780 | ||
1feac493 | 781 | return tx_state == ST_TX_NONE; |
6d2f5c27 JW |
782 | } |
783 | ||
784 | /* interrupt service routine for incoming and outgoing CIR data */ | |
785 | static irqreturn_t nvt_cir_isr(int irq, void *data) | |
786 | { | |
787 | struct nvt_dev *nvt = data; | |
788 | u8 status, iren, cur_state; | |
789 | unsigned long flags; | |
790 | ||
791 | nvt_dbg_verbose("%s firing", __func__); | |
792 | ||
6d2f5c27 JW |
793 | /* |
794 | * Get IR Status register contents. Write 1 to ack/clear | |
795 | * | |
796 | * bit: reg name - description | |
797 | * 7: CIR_IRSTS_RDR - RX Data Ready | |
798 | * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach | |
799 | * 5: CIR_IRSTS_PE - Packet End | |
800 | * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set) | |
801 | * 3: CIR_IRSTS_TE - TX FIFO Empty | |
802 | * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach | |
803 | * 1: CIR_IRSTS_TFU - TX FIFO Underrun | |
804 | * 0: CIR_IRSTS_GH - Min Length Detected | |
805 | */ | |
806 | status = nvt_cir_reg_read(nvt, CIR_IRSTS); | |
807 | if (!status) { | |
808 | nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__); | |
809 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
2bbf9e06 | 810 | return IRQ_NONE; |
6d2f5c27 JW |
811 | } |
812 | ||
813 | /* ack/clear all irq flags we've got */ | |
814 | nvt_cir_reg_write(nvt, status, CIR_IRSTS); | |
815 | nvt_cir_reg_write(nvt, 0, CIR_IRSTS); | |
816 | ||
817 | /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */ | |
818 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
819 | if (!iren) { | |
820 | nvt_dbg_verbose("%s exiting, CIR not enabled", __func__); | |
2bbf9e06 | 821 | return IRQ_NONE; |
6d2f5c27 JW |
822 | } |
823 | ||
068fb7dd | 824 | nvt_cir_log_irqs(status, iren); |
6d2f5c27 JW |
825 | |
826 | if (status & CIR_IRSTS_RTR) { | |
827 | /* FIXME: add code for study/learn mode */ | |
828 | /* We only do rx if not tx'ing */ | |
829 | if (nvt_cir_tx_inactive(nvt)) | |
830 | nvt_get_rx_ir_data(nvt); | |
831 | } | |
832 | ||
833 | if (status & CIR_IRSTS_PE) { | |
834 | if (nvt_cir_tx_inactive(nvt)) | |
835 | nvt_get_rx_ir_data(nvt); | |
836 | ||
837 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
838 | ||
839 | cur_state = nvt->study_state; | |
840 | ||
841 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
842 | ||
843 | if (cur_state == ST_STUDY_NONE) | |
844 | nvt_clear_cir_fifo(nvt); | |
845 | } | |
846 | ||
847 | if (status & CIR_IRSTS_TE) | |
848 | nvt_clear_tx_fifo(nvt); | |
849 | ||
850 | if (status & CIR_IRSTS_TTR) { | |
851 | unsigned int pos, count; | |
852 | u8 tmp; | |
853 | ||
854 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
855 | ||
856 | pos = nvt->tx.cur_buf_num; | |
857 | count = nvt->tx.buf_count; | |
858 | ||
859 | /* Write data into the hardware tx fifo while pos < count */ | |
860 | if (pos < count) { | |
861 | nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO); | |
862 | nvt->tx.cur_buf_num++; | |
863 | /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */ | |
864 | } else { | |
865 | tmp = nvt_cir_reg_read(nvt, CIR_IREN); | |
866 | nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN); | |
867 | } | |
868 | ||
869 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
870 | ||
871 | } | |
872 | ||
873 | if (status & CIR_IRSTS_TFU) { | |
874 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
875 | if (nvt->tx.tx_state == ST_TX_REPLY) { | |
876 | nvt->tx.tx_state = ST_TX_REQUEST; | |
877 | wake_up(&nvt->tx.queue); | |
878 | } | |
879 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
880 | } | |
881 | ||
882 | nvt_dbg_verbose("%s done", __func__); | |
2bbf9e06 | 883 | return IRQ_HANDLED; |
6d2f5c27 JW |
884 | } |
885 | ||
886 | /* Interrupt service routine for CIR Wake */ | |
887 | static irqreturn_t nvt_cir_wake_isr(int irq, void *data) | |
888 | { | |
889 | u8 status, iren, val; | |
890 | struct nvt_dev *nvt = data; | |
891 | unsigned long flags; | |
892 | ||
893 | nvt_dbg_wake("%s firing", __func__); | |
894 | ||
895 | status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS); | |
896 | if (!status) | |
2bbf9e06 | 897 | return IRQ_NONE; |
6d2f5c27 JW |
898 | |
899 | if (status & CIR_WAKE_IRSTS_IR_PENDING) | |
900 | nvt_clear_cir_wake_fifo(nvt); | |
901 | ||
902 | nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS); | |
903 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS); | |
904 | ||
905 | /* Interrupt may be shared with CIR, bail if Wake not enabled */ | |
906 | iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN); | |
907 | if (!iren) { | |
908 | nvt_dbg_wake("%s exiting, wake not enabled", __func__); | |
2bbf9e06 | 909 | return IRQ_HANDLED; |
6d2f5c27 JW |
910 | } |
911 | ||
912 | if ((status & CIR_WAKE_IRSTS_PE) && | |
913 | (nvt->wake_state == ST_WAKE_START)) { | |
914 | while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) { | |
915 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY); | |
916 | nvt_dbg("setting wake up key: 0x%x", val); | |
917 | } | |
918 | ||
919 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
920 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
921 | nvt->wake_state = ST_WAKE_FINISH; | |
922 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
923 | } | |
924 | ||
925 | nvt_dbg_wake("%s done", __func__); | |
2bbf9e06 | 926 | return IRQ_HANDLED; |
6d2f5c27 JW |
927 | } |
928 | ||
929 | static void nvt_enable_cir(struct nvt_dev *nvt) | |
930 | { | |
931 | /* set function enable flags */ | |
932 | nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
933 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
934 | CIR_IRCON); | |
935 | ||
6d2f5c27 | 936 | /* enable the CIR logical device */ |
0890655c | 937 | nvt_enable_logical_dev(nvt, LOGICAL_DEV_CIR); |
6d2f5c27 JW |
938 | |
939 | /* clear all pending interrupts */ | |
940 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
941 | ||
942 | /* enable interrupts */ | |
fbdc781c | 943 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
944 | } |
945 | ||
946 | static void nvt_disable_cir(struct nvt_dev *nvt) | |
947 | { | |
948 | /* disable CIR interrupts */ | |
949 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
950 | ||
951 | /* clear any and all pending interrupts */ | |
952 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
953 | ||
954 | /* clear all function enable flags */ | |
955 | nvt_cir_reg_write(nvt, 0, CIR_IRCON); | |
956 | ||
957 | /* clear hardware rx and tx fifos */ | |
958 | nvt_clear_cir_fifo(nvt); | |
959 | nvt_clear_tx_fifo(nvt); | |
960 | ||
6d2f5c27 | 961 | /* disable the CIR logical device */ |
a17ede9a | 962 | nvt_disable_logical_dev(nvt, LOGICAL_DEV_CIR); |
6d2f5c27 JW |
963 | } |
964 | ||
d8b4b582 | 965 | static int nvt_open(struct rc_dev *dev) |
6d2f5c27 | 966 | { |
d8b4b582 | 967 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
968 | unsigned long flags; |
969 | ||
970 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
6d2f5c27 JW |
971 | nvt_enable_cir(nvt); |
972 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
d8b4b582 | 977 | static void nvt_close(struct rc_dev *dev) |
6d2f5c27 | 978 | { |
d8b4b582 | 979 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
980 | unsigned long flags; |
981 | ||
982 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
6d2f5c27 JW |
983 | nvt_disable_cir(nvt); |
984 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
985 | } | |
986 | ||
987 | /* Allocate memory, probe hardware, and initialize everything */ | |
988 | static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) | |
989 | { | |
d8b4b582 DH |
990 | struct nvt_dev *nvt; |
991 | struct rc_dev *rdev; | |
6d2f5c27 JW |
992 | int ret = -ENOMEM; |
993 | ||
099256e5 | 994 | nvt = devm_kzalloc(&pdev->dev, sizeof(struct nvt_dev), GFP_KERNEL); |
6d2f5c27 JW |
995 | if (!nvt) |
996 | return ret; | |
997 | ||
6d2f5c27 | 998 | /* input device for IR remote (and tx) */ |
d8b4b582 | 999 | rdev = rc_allocate_device(); |
6d2f5c27 | 1000 | if (!rdev) |
70ef6991 | 1001 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
1002 | |
1003 | ret = -ENODEV; | |
c3c2077d AS |
1004 | /* activate pnp device */ |
1005 | if (pnp_activate_dev(pdev) < 0) { | |
1006 | dev_err(&pdev->dev, "Could not activate PNP device!\n"); | |
1007 | goto exit_free_dev_rdev; | |
1008 | } | |
1009 | ||
6d2f5c27 JW |
1010 | /* validate pnp resources */ |
1011 | if (!pnp_port_valid(pdev, 0) || | |
1012 | pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) { | |
1013 | dev_err(&pdev->dev, "IR PNP Port not valid!\n"); | |
70ef6991 | 1014 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
1015 | } |
1016 | ||
1017 | if (!pnp_irq_valid(pdev, 0)) { | |
1018 | dev_err(&pdev->dev, "PNP IRQ not valid!\n"); | |
70ef6991 | 1019 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
1020 | } |
1021 | ||
1022 | if (!pnp_port_valid(pdev, 1) || | |
1023 | pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) { | |
1024 | dev_err(&pdev->dev, "Wake PNP Port not valid!\n"); | |
70ef6991 | 1025 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
1026 | } |
1027 | ||
1028 | nvt->cir_addr = pnp_port_start(pdev, 0); | |
1029 | nvt->cir_irq = pnp_irq(pdev, 0); | |
1030 | ||
1031 | nvt->cir_wake_addr = pnp_port_start(pdev, 1); | |
1032 | /* irq is always shared between cir and cir wake */ | |
1033 | nvt->cir_wake_irq = nvt->cir_irq; | |
1034 | ||
1035 | nvt->cr_efir = CR_EFIR; | |
1036 | nvt->cr_efdr = CR_EFDR; | |
1037 | ||
1038 | spin_lock_init(&nvt->nvt_lock); | |
1039 | spin_lock_init(&nvt->tx.lock); | |
1040 | ||
6d2f5c27 JW |
1041 | pnp_set_drvdata(pdev, nvt); |
1042 | nvt->pdev = pdev; | |
1043 | ||
1044 | init_waitqueue_head(&nvt->tx.queue); | |
1045 | ||
6a5a3360 | 1046 | nvt_hw_detect(nvt); |
6d2f5c27 JW |
1047 | |
1048 | /* Initialize CIR & CIR Wake Logical Devices */ | |
1049 | nvt_efm_enable(nvt); | |
1050 | nvt_cir_ldev_init(nvt); | |
1051 | nvt_cir_wake_ldev_init(nvt); | |
1052 | nvt_efm_disable(nvt); | |
1053 | ||
ccca00d6 HK |
1054 | /* |
1055 | * Initialize CIR & CIR Wake Config Registers | |
1056 | * and enable logical devices | |
1057 | */ | |
6d2f5c27 JW |
1058 | nvt_cir_regs_init(nvt); |
1059 | nvt_cir_wake_regs_init(nvt); | |
1060 | ||
d8b4b582 DH |
1061 | /* Set up the rc device */ |
1062 | rdev->priv = nvt; | |
1063 | rdev->driver_type = RC_DRIVER_IR_RAW; | |
c5540fbb | 1064 | rdev->allowed_protocols = RC_BIT_ALL; |
d8b4b582 DH |
1065 | rdev->open = nvt_open; |
1066 | rdev->close = nvt_close; | |
1067 | rdev->tx_ir = nvt_tx_ir; | |
1068 | rdev->s_tx_carrier = nvt_set_tx_carrier; | |
1069 | rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver"; | |
46872d27 | 1070 | rdev->input_phys = "nuvoton/cir0"; |
d8b4b582 DH |
1071 | rdev->input_id.bustype = BUS_HOST; |
1072 | rdev->input_id.vendor = PCI_VENDOR_ID_WINBOND2; | |
1073 | rdev->input_id.product = nvt->chip_major; | |
1074 | rdev->input_id.version = nvt->chip_minor; | |
46872d27 | 1075 | rdev->dev.parent = &pdev->dev; |
d8b4b582 DH |
1076 | rdev->driver_name = NVT_DRIVER_NAME; |
1077 | rdev->map_name = RC_MAP_RC6_MCE; | |
d7b290a1 | 1078 | rdev->timeout = MS_TO_NS(100); |
46872d27 JW |
1079 | /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */ |
1080 | rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD); | |
6d2f5c27 | 1081 | #if 0 |
d8b4b582 DH |
1082 | rdev->min_timeout = XYZ; |
1083 | rdev->max_timeout = XYZ; | |
6d2f5c27 | 1084 | /* tx bits */ |
d8b4b582 | 1085 | rdev->tx_resolution = XYZ; |
6d2f5c27 | 1086 | #endif |
d62b6818 | 1087 | nvt->rdev = rdev; |
6d2f5c27 | 1088 | |
9fa35204 MK |
1089 | ret = rc_register_device(rdev); |
1090 | if (ret) | |
1091 | goto exit_free_dev_rdev; | |
1092 | ||
9ef449c6 LH |
1093 | ret = -EBUSY; |
1094 | /* now claim resources */ | |
099256e5 | 1095 | if (!devm_request_region(&pdev->dev, nvt->cir_addr, |
9ef449c6 | 1096 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) |
9fa35204 | 1097 | goto exit_unregister_device; |
9ef449c6 | 1098 | |
099256e5 HK |
1099 | if (devm_request_irq(&pdev->dev, nvt->cir_irq, nvt_cir_isr, |
1100 | IRQF_SHARED, NVT_DRIVER_NAME, (void *)nvt)) | |
1101 | goto exit_unregister_device; | |
9ef449c6 | 1102 | |
099256e5 | 1103 | if (!devm_request_region(&pdev->dev, nvt->cir_wake_addr, |
33cb5401 | 1104 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME "-wake")) |
099256e5 | 1105 | goto exit_unregister_device; |
9ef449c6 | 1106 | |
099256e5 HK |
1107 | if (devm_request_irq(&pdev->dev, nvt->cir_wake_irq, |
1108 | nvt_cir_wake_isr, IRQF_SHARED, | |
33cb5401 | 1109 | NVT_DRIVER_NAME "-wake", (void *)nvt)) |
099256e5 | 1110 | goto exit_unregister_device; |
9ef449c6 | 1111 | |
46872d27 | 1112 | device_init_wakeup(&pdev->dev, true); |
d62b6818 | 1113 | |
211477fe | 1114 | dev_notice(&pdev->dev, "driver has been successfully loaded\n"); |
6d2f5c27 JW |
1115 | if (debug) { |
1116 | cir_dump_regs(nvt); | |
1117 | cir_wake_dump_regs(nvt); | |
1118 | } | |
1119 | ||
1120 | return 0; | |
1121 | ||
9fa35204 MK |
1122 | exit_unregister_device: |
1123 | rc_unregister_device(rdev); | |
f73e1851 | 1124 | rdev = NULL; |
70ef6991 | 1125 | exit_free_dev_rdev: |
d8b4b582 | 1126 | rc_free_device(rdev); |
6d2f5c27 JW |
1127 | |
1128 | return ret; | |
1129 | } | |
1130 | ||
4c62e976 | 1131 | static void nvt_remove(struct pnp_dev *pdev) |
6d2f5c27 JW |
1132 | { |
1133 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1134 | unsigned long flags; | |
1135 | ||
1136 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1137 | /* disable CIR */ | |
1138 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1139 | nvt_disable_cir(nvt); | |
1140 | /* enable CIR Wake (for IR power-on) */ | |
1141 | nvt_enable_wake(nvt); | |
1142 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1143 | ||
d8b4b582 | 1144 | rc_unregister_device(nvt->rdev); |
6d2f5c27 JW |
1145 | } |
1146 | ||
1147 | static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state) | |
1148 | { | |
1149 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1150 | unsigned long flags; | |
1151 | ||
1152 | nvt_dbg("%s called", __func__); | |
1153 | ||
1154 | /* zero out misc state tracking */ | |
1155 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1156 | nvt->study_state = ST_STUDY_NONE; | |
1157 | nvt->wake_state = ST_WAKE_NONE; | |
1158 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1159 | ||
1160 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
1161 | nvt->tx.tx_state = ST_TX_NONE; | |
1162 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
1163 | ||
1164 | /* disable all CIR interrupts */ | |
1165 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1166 | ||
6d2f5c27 | 1167 | /* disable cir logical dev */ |
a17ede9a | 1168 | nvt_disable_logical_dev(nvt, LOGICAL_DEV_CIR); |
6d2f5c27 JW |
1169 | |
1170 | /* make sure wake is enabled */ | |
1171 | nvt_enable_wake(nvt); | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static int nvt_resume(struct pnp_dev *pdev) | |
1177 | { | |
6d2f5c27 JW |
1178 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); |
1179 | ||
1180 | nvt_dbg("%s called", __func__); | |
1181 | ||
6d2f5c27 JW |
1182 | nvt_cir_regs_init(nvt); |
1183 | nvt_cir_wake_regs_init(nvt); | |
1184 | ||
f2747cf6 | 1185 | return 0; |
6d2f5c27 JW |
1186 | } |
1187 | ||
1188 | static void nvt_shutdown(struct pnp_dev *pdev) | |
1189 | { | |
1190 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1191 | nvt_enable_wake(nvt); | |
1192 | } | |
1193 | ||
1194 | static const struct pnp_device_id nvt_ids[] = { | |
1195 | { "WEC0530", 0 }, /* CIR */ | |
1196 | { "NTN0530", 0 }, /* CIR for new chip's pnp id*/ | |
1197 | { "", 0 }, | |
1198 | }; | |
1199 | ||
1200 | static struct pnp_driver nvt_driver = { | |
1201 | .name = NVT_DRIVER_NAME, | |
1202 | .id_table = nvt_ids, | |
1203 | .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, | |
1204 | .probe = nvt_probe, | |
4c62e976 | 1205 | .remove = nvt_remove, |
6d2f5c27 JW |
1206 | .suspend = nvt_suspend, |
1207 | .resume = nvt_resume, | |
1208 | .shutdown = nvt_shutdown, | |
1209 | }; | |
1210 | ||
6d2f5c27 JW |
1211 | module_param(debug, int, S_IRUGO | S_IWUSR); |
1212 | MODULE_PARM_DESC(debug, "Enable debugging output"); | |
1213 | ||
1214 | MODULE_DEVICE_TABLE(pnp, nvt_ids); | |
1215 | MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver"); | |
1216 | ||
1217 | MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>"); | |
1218 | MODULE_LICENSE("GPL"); | |
1219 | ||
af638a04 | 1220 | module_pnp_driver(nvt_driver); |