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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 | ||
6d2f5c27 JW |
42 | /* write val to config reg */ |
43 | static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg) | |
44 | { | |
45 | outb(reg, nvt->cr_efir); | |
46 | outb(val, nvt->cr_efdr); | |
47 | } | |
48 | ||
49 | /* read val from config reg */ | |
50 | static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg) | |
51 | { | |
52 | outb(reg, nvt->cr_efir); | |
53 | return inb(nvt->cr_efdr); | |
54 | } | |
55 | ||
56 | /* update config register bit without changing other bits */ | |
57 | static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
58 | { | |
59 | u8 tmp = nvt_cr_read(nvt, reg) | val; | |
60 | nvt_cr_write(nvt, tmp, reg); | |
61 | } | |
62 | ||
63 | /* clear config register bit without changing other bits */ | |
64 | static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
65 | { | |
66 | u8 tmp = nvt_cr_read(nvt, reg) & ~val; | |
67 | nvt_cr_write(nvt, tmp, reg); | |
68 | } | |
69 | ||
70 | /* enter extended function mode */ | |
71 | static inline void nvt_efm_enable(struct nvt_dev *nvt) | |
72 | { | |
73 | /* Enabling Extended Function Mode explicitly requires writing 2x */ | |
74 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
75 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
76 | } | |
77 | ||
78 | /* exit extended function mode */ | |
79 | static inline void nvt_efm_disable(struct nvt_dev *nvt) | |
80 | { | |
81 | outb(EFER_EFM_DISABLE, nvt->cr_efir); | |
82 | } | |
83 | ||
84 | /* | |
85 | * When you want to address a specific logical device, write its logical | |
86 | * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing | |
87 | * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN. | |
88 | */ | |
89 | static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev) | |
90 | { | |
91 | outb(CR_LOGICAL_DEV_SEL, nvt->cr_efir); | |
92 | outb(ldev, nvt->cr_efdr); | |
93 | } | |
94 | ||
95 | /* write val to cir config register */ | |
96 | static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset) | |
97 | { | |
98 | outb(val, nvt->cir_addr + offset); | |
99 | } | |
100 | ||
101 | /* read val from cir config register */ | |
102 | static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset) | |
103 | { | |
104 | u8 val; | |
105 | ||
106 | val = inb(nvt->cir_addr + offset); | |
107 | ||
108 | return val; | |
109 | } | |
110 | ||
111 | /* write val to cir wake register */ | |
112 | static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt, | |
113 | u8 val, u8 offset) | |
114 | { | |
115 | outb(val, nvt->cir_wake_addr + offset); | |
116 | } | |
117 | ||
118 | /* read val from cir wake config register */ | |
119 | static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset) | |
120 | { | |
121 | u8 val; | |
122 | ||
123 | val = inb(nvt->cir_wake_addr + offset); | |
124 | ||
125 | return val; | |
126 | } | |
127 | ||
128 | /* dump current cir register contents */ | |
129 | static void cir_dump_regs(struct nvt_dev *nvt) | |
130 | { | |
131 | nvt_efm_enable(nvt); | |
132 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
133 | ||
563cd5ce JP |
134 | pr_info("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME); |
135 | pr_info(" * CR CIR ACTIVE : 0x%x\n", | |
136 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); | |
137 | pr_info(" * CR CIR BASE ADDR: 0x%x\n", | |
138 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | | |
6d2f5c27 | 139 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); |
563cd5ce JP |
140 | pr_info(" * CR CIR IRQ NUM: 0x%x\n", |
141 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); | |
6d2f5c27 JW |
142 | |
143 | nvt_efm_disable(nvt); | |
144 | ||
563cd5ce JP |
145 | pr_info("%s: Dump CIR registers:\n", NVT_DRIVER_NAME); |
146 | pr_info(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON)); | |
147 | pr_info(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS)); | |
148 | pr_info(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN)); | |
149 | pr_info(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT)); | |
150 | pr_info(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP)); | |
151 | pr_info(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC)); | |
152 | pr_info(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH)); | |
153 | pr_info(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL)); | |
154 | pr_info(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON)); | |
155 | pr_info(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS)); | |
156 | pr_info(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO)); | |
157 | pr_info(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT)); | |
158 | pr_info(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO)); | |
159 | pr_info(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH)); | |
160 | pr_info(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL)); | |
161 | pr_info(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM)); | |
6d2f5c27 JW |
162 | } |
163 | ||
164 | /* dump current cir wake register contents */ | |
165 | static void cir_wake_dump_regs(struct nvt_dev *nvt) | |
166 | { | |
167 | u8 i, fifo_len; | |
168 | ||
169 | nvt_efm_enable(nvt); | |
170 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
171 | ||
563cd5ce JP |
172 | pr_info("%s: Dump CIR WAKE logical device registers:\n", |
173 | NVT_DRIVER_NAME); | |
174 | pr_info(" * CR CIR WAKE ACTIVE : 0x%x\n", | |
175 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); | |
176 | pr_info(" * CR CIR WAKE BASE ADDR: 0x%x\n", | |
177 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | | |
4e6e29ad | 178 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); |
563cd5ce JP |
179 | pr_info(" * CR CIR WAKE IRQ NUM: 0x%x\n", |
180 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); | |
6d2f5c27 JW |
181 | |
182 | nvt_efm_disable(nvt); | |
183 | ||
563cd5ce JP |
184 | pr_info("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME); |
185 | pr_info(" * IRCON: 0x%x\n", | |
186 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON)); | |
187 | pr_info(" * IRSTS: 0x%x\n", | |
188 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS)); | |
189 | pr_info(" * IREN: 0x%x\n", | |
190 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN)); | |
191 | pr_info(" * FIFO CMP DEEP: 0x%x\n", | |
192 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP)); | |
193 | pr_info(" * FIFO CMP TOL: 0x%x\n", | |
194 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL)); | |
195 | pr_info(" * FIFO COUNT: 0x%x\n", | |
196 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT)); | |
197 | pr_info(" * SLCH: 0x%x\n", | |
198 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH)); | |
199 | pr_info(" * SLCL: 0x%x\n", | |
200 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL)); | |
201 | pr_info(" * FIFOCON: 0x%x\n", | |
202 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON)); | |
203 | pr_info(" * SRXFSTS: 0x%x\n", | |
204 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS)); | |
205 | pr_info(" * SAMPLE RX FIFO: 0x%x\n", | |
206 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO)); | |
207 | pr_info(" * WR FIFO DATA: 0x%x\n", | |
208 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA)); | |
209 | pr_info(" * RD FIFO ONLY: 0x%x\n", | |
210 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); | |
211 | pr_info(" * RD FIFO ONLY IDX: 0x%x\n", | |
212 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)); | |
213 | pr_info(" * FIFO IGNORE: 0x%x\n", | |
214 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE)); | |
215 | pr_info(" * IRFSM: 0x%x\n", | |
216 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM)); | |
6d2f5c27 JW |
217 | |
218 | fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT); | |
563cd5ce JP |
219 | pr_info("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len); |
220 | pr_info("* Contents ="); | |
6d2f5c27 | 221 | for (i = 0; i < fifo_len; i++) |
563cd5ce JP |
222 | pr_cont(" %02x", |
223 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); | |
224 | pr_cont("\n"); | |
6d2f5c27 JW |
225 | } |
226 | ||
227 | /* detect hardware features */ | |
228 | static int nvt_hw_detect(struct nvt_dev *nvt) | |
229 | { | |
230 | unsigned long flags; | |
231 | u8 chip_major, chip_minor; | |
362d3a3a JW |
232 | char chip_id[12]; |
233 | bool chip_unknown = false; | |
6d2f5c27 JW |
234 | |
235 | nvt_efm_enable(nvt); | |
236 | ||
237 | /* Check if we're wired for the alternate EFER setup */ | |
238 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
239 | if (chip_major == 0xff) { | |
240 | nvt->cr_efir = CR_EFIR2; | |
241 | nvt->cr_efdr = CR_EFDR2; | |
242 | nvt_efm_enable(nvt); | |
243 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
244 | } | |
245 | ||
246 | chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO); | |
6d2f5c27 | 247 | |
362d3a3a JW |
248 | /* these are the known working chip revisions... */ |
249 | switch (chip_major) { | |
250 | case CHIP_ID_HIGH_667: | |
251 | strcpy(chip_id, "w83667hg\0"); | |
252 | if (chip_minor != CHIP_ID_LOW_667) | |
253 | chip_unknown = true; | |
254 | break; | |
255 | case CHIP_ID_HIGH_677B: | |
256 | strcpy(chip_id, "w83677hg\0"); | |
257 | if (chip_minor != CHIP_ID_LOW_677B2 && | |
258 | chip_minor != CHIP_ID_LOW_677B3) | |
259 | chip_unknown = true; | |
260 | break; | |
261 | case CHIP_ID_HIGH_677C: | |
262 | strcpy(chip_id, "w83677hg-c\0"); | |
263 | if (chip_minor != CHIP_ID_LOW_677C) | |
264 | chip_unknown = true; | |
265 | break; | |
266 | default: | |
267 | strcpy(chip_id, "w836x7hg\0"); | |
268 | chip_unknown = true; | |
269 | break; | |
5df465df | 270 | } |
6d2f5c27 | 271 | |
362d3a3a JW |
272 | /* warn, but still let the driver load, if we don't know this chip */ |
273 | if (chip_unknown) | |
274 | nvt_pr(KERN_WARNING, "%s: unknown chip, id: 0x%02x 0x%02x, " | |
275 | "it may not work...", chip_id, chip_major, chip_minor); | |
276 | else | |
277 | nvt_dbg("%s: chip id: 0x%02x 0x%02x", | |
278 | chip_id, chip_major, chip_minor); | |
279 | ||
6d2f5c27 JW |
280 | nvt_efm_disable(nvt); |
281 | ||
282 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
283 | nvt->chip_major = chip_major; | |
284 | nvt->chip_minor = chip_minor; | |
285 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
286 | ||
f2747cf6 | 287 | return 0; |
6d2f5c27 JW |
288 | } |
289 | ||
290 | static void nvt_cir_ldev_init(struct nvt_dev *nvt) | |
291 | { | |
39381d4f JW |
292 | u8 val, psreg, psmask, psval; |
293 | ||
294 | if (nvt->chip_major == CHIP_ID_HIGH_667) { | |
295 | psreg = CR_MULTIFUNC_PIN_SEL; | |
296 | psmask = MULTIFUNC_PIN_SEL_MASK; | |
297 | psval = MULTIFUNC_ENABLE_CIR | MULTIFUNC_ENABLE_CIRWB; | |
298 | } else { | |
299 | psreg = CR_OUTPUT_PIN_SEL; | |
300 | psmask = OUTPUT_PIN_SEL_MASK; | |
301 | psval = OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB; | |
302 | } | |
6d2f5c27 | 303 | |
39381d4f JW |
304 | /* output pin selection: enable CIR, with WB sensor enabled */ |
305 | val = nvt_cr_read(nvt, psreg); | |
306 | val &= psmask; | |
307 | val |= psval; | |
308 | nvt_cr_write(nvt, val, psreg); | |
6d2f5c27 JW |
309 | |
310 | /* Select CIR logical device and enable */ | |
311 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
312 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
313 | ||
314 | nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
315 | nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
316 | ||
317 | nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC); | |
318 | ||
319 | nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d", | |
320 | nvt->cir_addr, nvt->cir_irq); | |
321 | } | |
322 | ||
323 | static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt) | |
324 | { | |
325 | /* Select ACPI logical device, enable it and CIR Wake */ | |
326 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
327 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
328 | ||
329 | /* Enable CIR Wake via PSOUT# (Pin60) */ | |
330 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
331 | ||
6d2f5c27 JW |
332 | /* enable pme interrupt of cir wakeup event */ |
333 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
334 | ||
335 | /* Select CIR Wake logical device and enable */ | |
336 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
337 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
338 | ||
339 | nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
340 | nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
341 | ||
342 | nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC); | |
343 | ||
344 | nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d", | |
345 | nvt->cir_wake_addr, nvt->cir_wake_irq); | |
346 | } | |
347 | ||
348 | /* clear out the hardware's cir rx fifo */ | |
349 | static void nvt_clear_cir_fifo(struct nvt_dev *nvt) | |
350 | { | |
351 | u8 val; | |
352 | ||
353 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
354 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
355 | } | |
356 | ||
357 | /* clear out the hardware's cir wake rx fifo */ | |
358 | static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt) | |
359 | { | |
360 | u8 val; | |
361 | ||
362 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON); | |
363 | nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR, | |
364 | CIR_WAKE_FIFOCON); | |
365 | } | |
366 | ||
367 | /* clear out the hardware's cir tx fifo */ | |
368 | static void nvt_clear_tx_fifo(struct nvt_dev *nvt) | |
369 | { | |
370 | u8 val; | |
371 | ||
372 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
373 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON); | |
374 | } | |
375 | ||
fbdc781c JW |
376 | /* enable RX Trigger Level Reach and Packet End interrupts */ |
377 | static void nvt_set_cir_iren(struct nvt_dev *nvt) | |
378 | { | |
379 | u8 iren; | |
380 | ||
381 | iren = CIR_IREN_RTR | CIR_IREN_PE; | |
382 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
383 | } | |
384 | ||
6d2f5c27 JW |
385 | static void nvt_cir_regs_init(struct nvt_dev *nvt) |
386 | { | |
387 | /* set sample limit count (PE interrupt raised when reached) */ | |
388 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH); | |
389 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL); | |
390 | ||
391 | /* set fifo irq trigger levels */ | |
392 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV | | |
393 | CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON); | |
394 | ||
395 | /* | |
396 | * Enable TX and RX, specify carrier on = low, off = high, and set | |
397 | * sample period (currently 50us) | |
398 | */ | |
4e6e29ad JW |
399 | nvt_cir_reg_write(nvt, |
400 | CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
401 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
402 | CIR_IRCON); | |
6d2f5c27 JW |
403 | |
404 | /* clear hardware rx and tx fifos */ | |
405 | nvt_clear_cir_fifo(nvt); | |
406 | nvt_clear_tx_fifo(nvt); | |
407 | ||
408 | /* clear any and all stray interrupts */ | |
409 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
410 | ||
fbdc781c JW |
411 | /* and finally, enable interrupts */ |
412 | nvt_set_cir_iren(nvt); | |
6d2f5c27 JW |
413 | } |
414 | ||
415 | static void nvt_cir_wake_regs_init(struct nvt_dev *nvt) | |
416 | { | |
3198ed16 JW |
417 | /* set number of bytes needed for wake from s3 (default 65) */ |
418 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES, | |
419 | CIR_WAKE_FIFO_CMP_DEEP); | |
6d2f5c27 JW |
420 | |
421 | /* set tolerance/variance allowed per byte during wake compare */ | |
422 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE, | |
423 | CIR_WAKE_FIFO_CMP_TOL); | |
424 | ||
425 | /* set sample limit count (PE interrupt raised when reached) */ | |
426 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH); | |
427 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL); | |
428 | ||
429 | /* set cir wake fifo rx trigger level (currently 67) */ | |
430 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV, | |
431 | CIR_WAKE_FIFOCON); | |
432 | ||
433 | /* | |
434 | * Enable TX and RX, specific carrier on = low, off = high, and set | |
435 | * sample period (currently 50us) | |
436 | */ | |
437 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
438 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
439 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, | |
440 | CIR_WAKE_IRCON); | |
441 | ||
442 | /* clear cir wake rx fifo */ | |
443 | nvt_clear_cir_wake_fifo(nvt); | |
444 | ||
445 | /* clear any and all stray interrupts */ | |
446 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); | |
447 | } | |
448 | ||
449 | static void nvt_enable_wake(struct nvt_dev *nvt) | |
450 | { | |
451 | nvt_efm_enable(nvt); | |
452 | ||
453 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
454 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
6d2f5c27 JW |
455 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); |
456 | ||
457 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
458 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
459 | ||
460 | nvt_efm_disable(nvt); | |
461 | ||
462 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
463 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
4e6e29ad JW |
464 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, |
465 | CIR_WAKE_IRCON); | |
6d2f5c27 JW |
466 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); |
467 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
468 | } | |
469 | ||
230dc94a | 470 | #if 0 /* Currently unused */ |
6d2f5c27 JW |
471 | /* rx carrier detect only works in learning mode, must be called w/nvt_lock */ |
472 | static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt) | |
473 | { | |
474 | u32 count, carrier, duration = 0; | |
475 | int i; | |
476 | ||
477 | count = nvt_cir_reg_read(nvt, CIR_FCCL) | | |
478 | nvt_cir_reg_read(nvt, CIR_FCCH) << 8; | |
479 | ||
480 | for (i = 0; i < nvt->pkts; i++) { | |
481 | if (nvt->buf[i] & BUF_PULSE_BIT) | |
482 | duration += nvt->buf[i] & BUF_LEN_MASK; | |
483 | } | |
484 | ||
485 | duration *= SAMPLE_PERIOD; | |
486 | ||
487 | if (!count || !duration) { | |
488 | nvt_pr(KERN_NOTICE, "Unable to determine carrier! (c:%u, d:%u)", | |
489 | count, duration); | |
490 | return 0; | |
491 | } | |
492 | ||
b4608fae | 493 | carrier = MS_TO_NS(count) / duration; |
6d2f5c27 JW |
494 | |
495 | if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER)) | |
496 | nvt_dbg("WTF? Carrier frequency out of range!"); | |
497 | ||
498 | nvt_dbg("Carrier frequency: %u (count %u, duration %u)", | |
499 | carrier, count, duration); | |
500 | ||
501 | return carrier; | |
502 | } | |
230dc94a | 503 | #endif |
6d2f5c27 JW |
504 | /* |
505 | * set carrier frequency | |
506 | * | |
507 | * set carrier on 2 registers: CP & CC | |
508 | * always set CP as 0x81 | |
509 | * set CC by SPEC, CC = 3MHz/carrier - 1 | |
510 | */ | |
d8b4b582 | 511 | static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier) |
6d2f5c27 | 512 | { |
d8b4b582 | 513 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
514 | u16 val; |
515 | ||
48cafec9 DC |
516 | if (carrier == 0) |
517 | return -EINVAL; | |
518 | ||
6d2f5c27 JW |
519 | nvt_cir_reg_write(nvt, 1, CIR_CP); |
520 | val = 3000000 / (carrier) - 1; | |
521 | nvt_cir_reg_write(nvt, val & 0xff, CIR_CC); | |
522 | ||
523 | nvt_dbg("cp: 0x%x cc: 0x%x\n", | |
524 | nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC)); | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | /* | |
530 | * nvt_tx_ir | |
531 | * | |
532 | * 1) clean TX fifo first (handled by AP) | |
533 | * 2) copy data from user space | |
534 | * 3) disable RX interrupts, enable TX interrupts: TTR & TFU | |
535 | * 4) send 9 packets to TX FIFO to open TTR | |
536 | * in interrupt_handler: | |
537 | * 5) send all data out | |
538 | * go back to write(): | |
539 | * 6) disable TX interrupts, re-enable RX interupts | |
540 | * | |
541 | * The key problem of this function is user space data may larger than | |
542 | * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to | |
543 | * buf, and keep current copied data buf num in cur_buf_num. But driver's buf | |
544 | * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to | |
545 | * set TXFCONT as 0xff, until buf_count less than 0xff. | |
546 | */ | |
5588dc2b | 547 | static int nvt_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned n) |
6d2f5c27 | 548 | { |
d8b4b582 | 549 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 | 550 | unsigned long flags; |
6d2f5c27 JW |
551 | unsigned int i; |
552 | u8 iren; | |
553 | int ret; | |
554 | ||
555 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
556 | ||
5588dc2b DH |
557 | ret = min((unsigned)(TX_BUF_LEN / sizeof(unsigned)), n); |
558 | nvt->tx.buf_count = (ret * sizeof(unsigned)); | |
6d2f5c27 JW |
559 | |
560 | memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count); | |
561 | ||
562 | nvt->tx.cur_buf_num = 0; | |
563 | ||
564 | /* save currently enabled interrupts */ | |
565 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
566 | ||
567 | /* now disable all interrupts, save TFU & TTR */ | |
568 | nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN); | |
569 | ||
570 | nvt->tx.tx_state = ST_TX_REPLY; | |
571 | ||
572 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 | | |
573 | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
574 | ||
575 | /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */ | |
576 | for (i = 0; i < 9; i++) | |
577 | nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO); | |
578 | ||
579 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
580 | ||
581 | wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST); | |
582 | ||
583 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
584 | nvt->tx.tx_state = ST_TX_NONE; | |
585 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
586 | ||
587 | /* restore enabled interrupts to prior state */ | |
588 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
589 | ||
590 | return ret; | |
591 | } | |
592 | ||
593 | /* dump contents of the last rx buffer we got from the hw rx fifo */ | |
594 | static void nvt_dump_rx_buf(struct nvt_dev *nvt) | |
595 | { | |
596 | int i; | |
597 | ||
4e6e29ad | 598 | printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts); |
6d2f5c27 | 599 | for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++) |
4e6e29ad JW |
600 | printk(KERN_CONT "0x%02x ", nvt->buf[i]); |
601 | printk(KERN_CONT "\n"); | |
6d2f5c27 JW |
602 | } |
603 | ||
604 | /* | |
605 | * Process raw data in rx driver buffer, store it in raw IR event kfifo, | |
606 | * trigger decode when appropriate. | |
607 | * | |
608 | * We get IR data samples one byte at a time. If the msb is set, its a pulse, | |
609 | * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD | |
610 | * (default 50us) intervals for that pulse/space. A discrete signal is | |
611 | * followed by a series of 0x7f packets, then either 0x7<something> or 0x80 | |
612 | * to signal more IR coming (repeats) or end of IR, respectively. We store | |
613 | * sample data in the raw event kfifo until we see 0x7<something> (except f) | |
614 | * or 0x80, at which time, we trigger a decode operation. | |
615 | */ | |
616 | static void nvt_process_rx_ir_data(struct nvt_dev *nvt) | |
617 | { | |
4651918a | 618 | DEFINE_IR_RAW_EVENT(rawir); |
6d2f5c27 JW |
619 | u8 sample; |
620 | int i; | |
621 | ||
622 | nvt_dbg_verbose("%s firing", __func__); | |
623 | ||
624 | if (debug) | |
625 | nvt_dump_rx_buf(nvt); | |
626 | ||
de4ed0c1 | 627 | nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts); |
6d2f5c27 | 628 | |
b7582815 JW |
629 | init_ir_raw_event(&rawir); |
630 | ||
de4ed0c1 | 631 | for (i = 0; i < nvt->pkts; i++) { |
6d2f5c27 JW |
632 | sample = nvt->buf[i]; |
633 | ||
634 | rawir.pulse = ((sample & BUF_PULSE_BIT) != 0); | |
b4608fae JW |
635 | rawir.duration = US_TO_NS((sample & BUF_LEN_MASK) |
636 | * SAMPLE_PERIOD); | |
6d2f5c27 | 637 | |
de4ed0c1 JW |
638 | nvt_dbg("Storing %s with duration %d", |
639 | rawir.pulse ? "pulse" : "space", rawir.duration); | |
4651918a | 640 | |
de4ed0c1 | 641 | ir_raw_event_store_with_filter(nvt->rdev, &rawir); |
6d2f5c27 JW |
642 | |
643 | /* | |
644 | * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE | |
645 | * indicates end of IR signal, but new data incoming. In both | |
646 | * cases, it means we're ready to call ir_raw_event_handle | |
647 | */ | |
de4ed0c1 | 648 | if ((sample == BUF_PULSE_BIT) && (i + 1 < nvt->pkts)) { |
b7582815 | 649 | nvt_dbg("Calling ir_raw_event_handle (signal end)\n"); |
6d2f5c27 | 650 | ir_raw_event_handle(nvt->rdev); |
b7582815 | 651 | } |
6d2f5c27 JW |
652 | } |
653 | ||
de4ed0c1 JW |
654 | nvt->pkts = 0; |
655 | ||
b7582815 JW |
656 | nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n"); |
657 | ir_raw_event_handle(nvt->rdev); | |
658 | ||
6d2f5c27 JW |
659 | nvt_dbg_verbose("%s done", __func__); |
660 | } | |
661 | ||
fbdc781c JW |
662 | static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt) |
663 | { | |
664 | nvt_pr(KERN_WARNING, "RX FIFO overrun detected, flushing data!"); | |
665 | ||
666 | nvt->pkts = 0; | |
667 | nvt_clear_cir_fifo(nvt); | |
668 | ir_raw_event_reset(nvt->rdev); | |
669 | } | |
670 | ||
6d2f5c27 JW |
671 | /* copy data from hardware rx fifo into driver buffer */ |
672 | static void nvt_get_rx_ir_data(struct nvt_dev *nvt) | |
673 | { | |
674 | unsigned long flags; | |
675 | u8 fifocount, val; | |
676 | unsigned int b_idx; | |
fbdc781c | 677 | bool overrun = false; |
6d2f5c27 JW |
678 | int i; |
679 | ||
680 | /* Get count of how many bytes to read from RX FIFO */ | |
681 | fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT); | |
682 | /* if we get 0xff, probably means the logical dev is disabled */ | |
683 | if (fifocount == 0xff) | |
684 | return; | |
fbdc781c | 685 | /* watch out for a fifo overrun condition */ |
6d2f5c27 | 686 | else if (fifocount > RX_BUF_LEN) { |
fbdc781c JW |
687 | overrun = true; |
688 | fifocount = RX_BUF_LEN; | |
6d2f5c27 JW |
689 | } |
690 | ||
691 | nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount); | |
692 | ||
693 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
694 | ||
695 | b_idx = nvt->pkts; | |
696 | ||
697 | /* This should never happen, but lets check anyway... */ | |
698 | if (b_idx + fifocount > RX_BUF_LEN) { | |
699 | nvt_process_rx_ir_data(nvt); | |
700 | b_idx = 0; | |
701 | } | |
702 | ||
703 | /* Read fifocount bytes from CIR Sample RX FIFO register */ | |
704 | for (i = 0; i < fifocount; i++) { | |
705 | val = nvt_cir_reg_read(nvt, CIR_SRXFIFO); | |
706 | nvt->buf[b_idx + i] = val; | |
707 | } | |
708 | ||
709 | nvt->pkts += fifocount; | |
710 | nvt_dbg("%s: pkts now %d", __func__, nvt->pkts); | |
711 | ||
712 | nvt_process_rx_ir_data(nvt); | |
713 | ||
fbdc781c JW |
714 | if (overrun) |
715 | nvt_handle_rx_fifo_overrun(nvt); | |
716 | ||
6d2f5c27 JW |
717 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); |
718 | } | |
719 | ||
720 | static void nvt_cir_log_irqs(u8 status, u8 iren) | |
721 | { | |
722 | nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s", | |
723 | status, iren, | |
724 | status & CIR_IRSTS_RDR ? " RDR" : "", | |
725 | status & CIR_IRSTS_RTR ? " RTR" : "", | |
726 | status & CIR_IRSTS_PE ? " PE" : "", | |
727 | status & CIR_IRSTS_RFO ? " RFO" : "", | |
728 | status & CIR_IRSTS_TE ? " TE" : "", | |
729 | status & CIR_IRSTS_TTR ? " TTR" : "", | |
730 | status & CIR_IRSTS_TFU ? " TFU" : "", | |
731 | status & CIR_IRSTS_GH ? " GH" : "", | |
732 | status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE | | |
733 | CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR | | |
734 | CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : ""); | |
735 | } | |
736 | ||
737 | static bool nvt_cir_tx_inactive(struct nvt_dev *nvt) | |
738 | { | |
739 | unsigned long flags; | |
740 | bool tx_inactive; | |
741 | u8 tx_state; | |
742 | ||
743 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
744 | tx_state = nvt->tx.tx_state; | |
745 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
746 | ||
747 | tx_inactive = (tx_state == ST_TX_NONE); | |
748 | ||
749 | return tx_inactive; | |
750 | } | |
751 | ||
752 | /* interrupt service routine for incoming and outgoing CIR data */ | |
753 | static irqreturn_t nvt_cir_isr(int irq, void *data) | |
754 | { | |
755 | struct nvt_dev *nvt = data; | |
756 | u8 status, iren, cur_state; | |
757 | unsigned long flags; | |
758 | ||
759 | nvt_dbg_verbose("%s firing", __func__); | |
760 | ||
761 | nvt_efm_enable(nvt); | |
762 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
763 | nvt_efm_disable(nvt); | |
764 | ||
765 | /* | |
766 | * Get IR Status register contents. Write 1 to ack/clear | |
767 | * | |
768 | * bit: reg name - description | |
769 | * 7: CIR_IRSTS_RDR - RX Data Ready | |
770 | * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach | |
771 | * 5: CIR_IRSTS_PE - Packet End | |
772 | * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set) | |
773 | * 3: CIR_IRSTS_TE - TX FIFO Empty | |
774 | * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach | |
775 | * 1: CIR_IRSTS_TFU - TX FIFO Underrun | |
776 | * 0: CIR_IRSTS_GH - Min Length Detected | |
777 | */ | |
778 | status = nvt_cir_reg_read(nvt, CIR_IRSTS); | |
779 | if (!status) { | |
780 | nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__); | |
781 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
782 | return IRQ_RETVAL(IRQ_NONE); | |
783 | } | |
784 | ||
785 | /* ack/clear all irq flags we've got */ | |
786 | nvt_cir_reg_write(nvt, status, CIR_IRSTS); | |
787 | nvt_cir_reg_write(nvt, 0, CIR_IRSTS); | |
788 | ||
789 | /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */ | |
790 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
791 | if (!iren) { | |
792 | nvt_dbg_verbose("%s exiting, CIR not enabled", __func__); | |
793 | return IRQ_RETVAL(IRQ_NONE); | |
794 | } | |
795 | ||
796 | if (debug) | |
797 | nvt_cir_log_irqs(status, iren); | |
798 | ||
799 | if (status & CIR_IRSTS_RTR) { | |
800 | /* FIXME: add code for study/learn mode */ | |
801 | /* We only do rx if not tx'ing */ | |
802 | if (nvt_cir_tx_inactive(nvt)) | |
803 | nvt_get_rx_ir_data(nvt); | |
804 | } | |
805 | ||
806 | if (status & CIR_IRSTS_PE) { | |
807 | if (nvt_cir_tx_inactive(nvt)) | |
808 | nvt_get_rx_ir_data(nvt); | |
809 | ||
810 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
811 | ||
812 | cur_state = nvt->study_state; | |
813 | ||
814 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
815 | ||
816 | if (cur_state == ST_STUDY_NONE) | |
817 | nvt_clear_cir_fifo(nvt); | |
818 | } | |
819 | ||
820 | if (status & CIR_IRSTS_TE) | |
821 | nvt_clear_tx_fifo(nvt); | |
822 | ||
823 | if (status & CIR_IRSTS_TTR) { | |
824 | unsigned int pos, count; | |
825 | u8 tmp; | |
826 | ||
827 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
828 | ||
829 | pos = nvt->tx.cur_buf_num; | |
830 | count = nvt->tx.buf_count; | |
831 | ||
832 | /* Write data into the hardware tx fifo while pos < count */ | |
833 | if (pos < count) { | |
834 | nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO); | |
835 | nvt->tx.cur_buf_num++; | |
836 | /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */ | |
837 | } else { | |
838 | tmp = nvt_cir_reg_read(nvt, CIR_IREN); | |
839 | nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN); | |
840 | } | |
841 | ||
842 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
843 | ||
844 | } | |
845 | ||
846 | if (status & CIR_IRSTS_TFU) { | |
847 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
848 | if (nvt->tx.tx_state == ST_TX_REPLY) { | |
849 | nvt->tx.tx_state = ST_TX_REQUEST; | |
850 | wake_up(&nvt->tx.queue); | |
851 | } | |
852 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
853 | } | |
854 | ||
855 | nvt_dbg_verbose("%s done", __func__); | |
856 | return IRQ_RETVAL(IRQ_HANDLED); | |
857 | } | |
858 | ||
859 | /* Interrupt service routine for CIR Wake */ | |
860 | static irqreturn_t nvt_cir_wake_isr(int irq, void *data) | |
861 | { | |
862 | u8 status, iren, val; | |
863 | struct nvt_dev *nvt = data; | |
864 | unsigned long flags; | |
865 | ||
866 | nvt_dbg_wake("%s firing", __func__); | |
867 | ||
868 | status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS); | |
869 | if (!status) | |
870 | return IRQ_RETVAL(IRQ_NONE); | |
871 | ||
872 | if (status & CIR_WAKE_IRSTS_IR_PENDING) | |
873 | nvt_clear_cir_wake_fifo(nvt); | |
874 | ||
875 | nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS); | |
876 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS); | |
877 | ||
878 | /* Interrupt may be shared with CIR, bail if Wake not enabled */ | |
879 | iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN); | |
880 | if (!iren) { | |
881 | nvt_dbg_wake("%s exiting, wake not enabled", __func__); | |
882 | return IRQ_RETVAL(IRQ_HANDLED); | |
883 | } | |
884 | ||
885 | if ((status & CIR_WAKE_IRSTS_PE) && | |
886 | (nvt->wake_state == ST_WAKE_START)) { | |
887 | while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) { | |
888 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY); | |
889 | nvt_dbg("setting wake up key: 0x%x", val); | |
890 | } | |
891 | ||
892 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
893 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
894 | nvt->wake_state = ST_WAKE_FINISH; | |
895 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
896 | } | |
897 | ||
898 | nvt_dbg_wake("%s done", __func__); | |
899 | return IRQ_RETVAL(IRQ_HANDLED); | |
900 | } | |
901 | ||
902 | static void nvt_enable_cir(struct nvt_dev *nvt) | |
903 | { | |
904 | /* set function enable flags */ | |
905 | nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
906 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
907 | CIR_IRCON); | |
908 | ||
909 | nvt_efm_enable(nvt); | |
910 | ||
911 | /* enable the CIR logical device */ | |
912 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
913 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
914 | ||
915 | nvt_efm_disable(nvt); | |
916 | ||
917 | /* clear all pending interrupts */ | |
918 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
919 | ||
920 | /* enable interrupts */ | |
fbdc781c | 921 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
922 | } |
923 | ||
924 | static void nvt_disable_cir(struct nvt_dev *nvt) | |
925 | { | |
926 | /* disable CIR interrupts */ | |
927 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
928 | ||
929 | /* clear any and all pending interrupts */ | |
930 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
931 | ||
932 | /* clear all function enable flags */ | |
933 | nvt_cir_reg_write(nvt, 0, CIR_IRCON); | |
934 | ||
935 | /* clear hardware rx and tx fifos */ | |
936 | nvt_clear_cir_fifo(nvt); | |
937 | nvt_clear_tx_fifo(nvt); | |
938 | ||
939 | nvt_efm_enable(nvt); | |
940 | ||
941 | /* disable the CIR logical device */ | |
942 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
943 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
944 | ||
945 | nvt_efm_disable(nvt); | |
946 | } | |
947 | ||
d8b4b582 | 948 | static int nvt_open(struct rc_dev *dev) |
6d2f5c27 | 949 | { |
d8b4b582 | 950 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
951 | unsigned long flags; |
952 | ||
953 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
6d2f5c27 JW |
954 | nvt_enable_cir(nvt); |
955 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
d8b4b582 | 960 | static void nvt_close(struct rc_dev *dev) |
6d2f5c27 | 961 | { |
d8b4b582 | 962 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
963 | unsigned long flags; |
964 | ||
965 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
6d2f5c27 JW |
966 | nvt_disable_cir(nvt); |
967 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
968 | } | |
969 | ||
970 | /* Allocate memory, probe hardware, and initialize everything */ | |
971 | static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) | |
972 | { | |
d8b4b582 DH |
973 | struct nvt_dev *nvt; |
974 | struct rc_dev *rdev; | |
6d2f5c27 JW |
975 | int ret = -ENOMEM; |
976 | ||
977 | nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL); | |
978 | if (!nvt) | |
979 | return ret; | |
980 | ||
6d2f5c27 | 981 | /* input device for IR remote (and tx) */ |
d8b4b582 | 982 | rdev = rc_allocate_device(); |
6d2f5c27 | 983 | if (!rdev) |
70ef6991 | 984 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
985 | |
986 | ret = -ENODEV; | |
c3c2077d AS |
987 | /* activate pnp device */ |
988 | if (pnp_activate_dev(pdev) < 0) { | |
989 | dev_err(&pdev->dev, "Could not activate PNP device!\n"); | |
990 | goto exit_free_dev_rdev; | |
991 | } | |
992 | ||
6d2f5c27 JW |
993 | /* validate pnp resources */ |
994 | if (!pnp_port_valid(pdev, 0) || | |
995 | pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) { | |
996 | dev_err(&pdev->dev, "IR PNP Port not valid!\n"); | |
70ef6991 | 997 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
998 | } |
999 | ||
1000 | if (!pnp_irq_valid(pdev, 0)) { | |
1001 | dev_err(&pdev->dev, "PNP IRQ not valid!\n"); | |
70ef6991 | 1002 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
1003 | } |
1004 | ||
1005 | if (!pnp_port_valid(pdev, 1) || | |
1006 | pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) { | |
1007 | dev_err(&pdev->dev, "Wake PNP Port not valid!\n"); | |
70ef6991 | 1008 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
1009 | } |
1010 | ||
1011 | nvt->cir_addr = pnp_port_start(pdev, 0); | |
1012 | nvt->cir_irq = pnp_irq(pdev, 0); | |
1013 | ||
1014 | nvt->cir_wake_addr = pnp_port_start(pdev, 1); | |
1015 | /* irq is always shared between cir and cir wake */ | |
1016 | nvt->cir_wake_irq = nvt->cir_irq; | |
1017 | ||
1018 | nvt->cr_efir = CR_EFIR; | |
1019 | nvt->cr_efdr = CR_EFDR; | |
1020 | ||
1021 | spin_lock_init(&nvt->nvt_lock); | |
1022 | spin_lock_init(&nvt->tx.lock); | |
1023 | ||
6d2f5c27 JW |
1024 | pnp_set_drvdata(pdev, nvt); |
1025 | nvt->pdev = pdev; | |
1026 | ||
1027 | init_waitqueue_head(&nvt->tx.queue); | |
1028 | ||
1029 | ret = nvt_hw_detect(nvt); | |
1030 | if (ret) | |
70ef6991 | 1031 | goto exit_free_dev_rdev; |
6d2f5c27 JW |
1032 | |
1033 | /* Initialize CIR & CIR Wake Logical Devices */ | |
1034 | nvt_efm_enable(nvt); | |
1035 | nvt_cir_ldev_init(nvt); | |
1036 | nvt_cir_wake_ldev_init(nvt); | |
1037 | nvt_efm_disable(nvt); | |
1038 | ||
1039 | /* Initialize CIR & CIR Wake Config Registers */ | |
1040 | nvt_cir_regs_init(nvt); | |
1041 | nvt_cir_wake_regs_init(nvt); | |
1042 | ||
d8b4b582 DH |
1043 | /* Set up the rc device */ |
1044 | rdev->priv = nvt; | |
1045 | rdev->driver_type = RC_DRIVER_IR_RAW; | |
c5540fbb | 1046 | rdev->allowed_protocols = RC_BIT_ALL; |
d8b4b582 DH |
1047 | rdev->open = nvt_open; |
1048 | rdev->close = nvt_close; | |
1049 | rdev->tx_ir = nvt_tx_ir; | |
1050 | rdev->s_tx_carrier = nvt_set_tx_carrier; | |
1051 | rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver"; | |
46872d27 | 1052 | rdev->input_phys = "nuvoton/cir0"; |
d8b4b582 DH |
1053 | rdev->input_id.bustype = BUS_HOST; |
1054 | rdev->input_id.vendor = PCI_VENDOR_ID_WINBOND2; | |
1055 | rdev->input_id.product = nvt->chip_major; | |
1056 | rdev->input_id.version = nvt->chip_minor; | |
46872d27 | 1057 | rdev->dev.parent = &pdev->dev; |
d8b4b582 DH |
1058 | rdev->driver_name = NVT_DRIVER_NAME; |
1059 | rdev->map_name = RC_MAP_RC6_MCE; | |
d7b290a1 | 1060 | rdev->timeout = MS_TO_NS(100); |
46872d27 JW |
1061 | /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */ |
1062 | rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD); | |
6d2f5c27 | 1063 | #if 0 |
d8b4b582 DH |
1064 | rdev->min_timeout = XYZ; |
1065 | rdev->max_timeout = XYZ; | |
6d2f5c27 | 1066 | /* tx bits */ |
d8b4b582 | 1067 | rdev->tx_resolution = XYZ; |
6d2f5c27 | 1068 | #endif |
d62b6818 | 1069 | nvt->rdev = rdev; |
6d2f5c27 | 1070 | |
9fa35204 MK |
1071 | ret = rc_register_device(rdev); |
1072 | if (ret) | |
1073 | goto exit_free_dev_rdev; | |
1074 | ||
9ef449c6 LH |
1075 | ret = -EBUSY; |
1076 | /* now claim resources */ | |
1077 | if (!request_region(nvt->cir_addr, | |
1078 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
9fa35204 | 1079 | goto exit_unregister_device; |
9ef449c6 LH |
1080 | |
1081 | if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED, | |
1082 | NVT_DRIVER_NAME, (void *)nvt)) | |
70ef6991 | 1083 | goto exit_release_cir_addr; |
9ef449c6 LH |
1084 | |
1085 | if (!request_region(nvt->cir_wake_addr, | |
1086 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
70ef6991 | 1087 | goto exit_free_irq; |
9ef449c6 LH |
1088 | |
1089 | if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED, | |
1090 | NVT_DRIVER_NAME, (void *)nvt)) | |
70ef6991 | 1091 | goto exit_release_cir_wake_addr; |
9ef449c6 | 1092 | |
46872d27 | 1093 | device_init_wakeup(&pdev->dev, true); |
d62b6818 | 1094 | |
6d2f5c27 JW |
1095 | nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n"); |
1096 | if (debug) { | |
1097 | cir_dump_regs(nvt); | |
1098 | cir_wake_dump_regs(nvt); | |
1099 | } | |
1100 | ||
1101 | return 0; | |
1102 | ||
70ef6991 | 1103 | exit_release_cir_wake_addr: |
f27b853e | 1104 | release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH); |
70ef6991 | 1105 | exit_free_irq: |
f27b853e | 1106 | free_irq(nvt->cir_irq, nvt); |
70ef6991 | 1107 | exit_release_cir_addr: |
f27b853e | 1108 | release_region(nvt->cir_addr, CIR_IOREG_LENGTH); |
9fa35204 MK |
1109 | exit_unregister_device: |
1110 | rc_unregister_device(rdev); | |
f73e1851 | 1111 | rdev = NULL; |
70ef6991 | 1112 | exit_free_dev_rdev: |
d8b4b582 | 1113 | rc_free_device(rdev); |
6d2f5c27 JW |
1114 | kfree(nvt); |
1115 | ||
1116 | return ret; | |
1117 | } | |
1118 | ||
4c62e976 | 1119 | static void nvt_remove(struct pnp_dev *pdev) |
6d2f5c27 JW |
1120 | { |
1121 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1122 | unsigned long flags; | |
1123 | ||
1124 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1125 | /* disable CIR */ | |
1126 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1127 | nvt_disable_cir(nvt); | |
1128 | /* enable CIR Wake (for IR power-on) */ | |
1129 | nvt_enable_wake(nvt); | |
1130 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1131 | ||
1132 | /* free resources */ | |
1133 | free_irq(nvt->cir_irq, nvt); | |
1134 | free_irq(nvt->cir_wake_irq, nvt); | |
1135 | release_region(nvt->cir_addr, CIR_IOREG_LENGTH); | |
1136 | release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH); | |
1137 | ||
d8b4b582 | 1138 | rc_unregister_device(nvt->rdev); |
6d2f5c27 | 1139 | |
6d2f5c27 JW |
1140 | kfree(nvt); |
1141 | } | |
1142 | ||
1143 | static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state) | |
1144 | { | |
1145 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1146 | unsigned long flags; | |
1147 | ||
1148 | nvt_dbg("%s called", __func__); | |
1149 | ||
1150 | /* zero out misc state tracking */ | |
1151 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1152 | nvt->study_state = ST_STUDY_NONE; | |
1153 | nvt->wake_state = ST_WAKE_NONE; | |
1154 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1155 | ||
1156 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
1157 | nvt->tx.tx_state = ST_TX_NONE; | |
1158 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
1159 | ||
1160 | /* disable all CIR interrupts */ | |
1161 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1162 | ||
1163 | nvt_efm_enable(nvt); | |
1164 | ||
1165 | /* disable cir logical dev */ | |
1166 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
1167 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
1168 | ||
1169 | nvt_efm_disable(nvt); | |
1170 | ||
1171 | /* make sure wake is enabled */ | |
1172 | nvt_enable_wake(nvt); | |
1173 | ||
1174 | return 0; | |
1175 | } | |
1176 | ||
1177 | static int nvt_resume(struct pnp_dev *pdev) | |
1178 | { | |
6d2f5c27 JW |
1179 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); |
1180 | ||
1181 | nvt_dbg("%s called", __func__); | |
1182 | ||
1183 | /* open interrupt */ | |
fbdc781c | 1184 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
1185 | |
1186 | /* Enable CIR logical device */ | |
1187 | nvt_efm_enable(nvt); | |
1188 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
1189 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
1190 | ||
1191 | nvt_efm_disable(nvt); | |
1192 | ||
1193 | nvt_cir_regs_init(nvt); | |
1194 | nvt_cir_wake_regs_init(nvt); | |
1195 | ||
f2747cf6 | 1196 | return 0; |
6d2f5c27 JW |
1197 | } |
1198 | ||
1199 | static void nvt_shutdown(struct pnp_dev *pdev) | |
1200 | { | |
1201 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1202 | nvt_enable_wake(nvt); | |
1203 | } | |
1204 | ||
1205 | static const struct pnp_device_id nvt_ids[] = { | |
1206 | { "WEC0530", 0 }, /* CIR */ | |
1207 | { "NTN0530", 0 }, /* CIR for new chip's pnp id*/ | |
1208 | { "", 0 }, | |
1209 | }; | |
1210 | ||
1211 | static struct pnp_driver nvt_driver = { | |
1212 | .name = NVT_DRIVER_NAME, | |
1213 | .id_table = nvt_ids, | |
1214 | .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, | |
1215 | .probe = nvt_probe, | |
4c62e976 | 1216 | .remove = nvt_remove, |
6d2f5c27 JW |
1217 | .suspend = nvt_suspend, |
1218 | .resume = nvt_resume, | |
1219 | .shutdown = nvt_shutdown, | |
1220 | }; | |
1221 | ||
6d2f5c27 JW |
1222 | module_param(debug, int, S_IRUGO | S_IWUSR); |
1223 | MODULE_PARM_DESC(debug, "Enable debugging output"); | |
1224 | ||
1225 | MODULE_DEVICE_TABLE(pnp, nvt_ids); | |
1226 | MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver"); | |
1227 | ||
1228 | MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>"); | |
1229 | MODULE_LICENSE("GPL"); | |
1230 | ||
af638a04 | 1231 | module_pnp_driver(nvt_driver); |