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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; | |
232 | int ret = 0; | |
362d3a3a JW |
233 | char chip_id[12]; |
234 | bool chip_unknown = false; | |
6d2f5c27 JW |
235 | |
236 | nvt_efm_enable(nvt); | |
237 | ||
238 | /* Check if we're wired for the alternate EFER setup */ | |
239 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
240 | if (chip_major == 0xff) { | |
241 | nvt->cr_efir = CR_EFIR2; | |
242 | nvt->cr_efdr = CR_EFDR2; | |
243 | nvt_efm_enable(nvt); | |
244 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
245 | } | |
246 | ||
247 | chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO); | |
6d2f5c27 | 248 | |
362d3a3a JW |
249 | /* these are the known working chip revisions... */ |
250 | switch (chip_major) { | |
251 | case CHIP_ID_HIGH_667: | |
252 | strcpy(chip_id, "w83667hg\0"); | |
253 | if (chip_minor != CHIP_ID_LOW_667) | |
254 | chip_unknown = true; | |
255 | break; | |
256 | case CHIP_ID_HIGH_677B: | |
257 | strcpy(chip_id, "w83677hg\0"); | |
258 | if (chip_minor != CHIP_ID_LOW_677B2 && | |
259 | chip_minor != CHIP_ID_LOW_677B3) | |
260 | chip_unknown = true; | |
261 | break; | |
262 | case CHIP_ID_HIGH_677C: | |
263 | strcpy(chip_id, "w83677hg-c\0"); | |
264 | if (chip_minor != CHIP_ID_LOW_677C) | |
265 | chip_unknown = true; | |
266 | break; | |
267 | default: | |
268 | strcpy(chip_id, "w836x7hg\0"); | |
269 | chip_unknown = true; | |
270 | break; | |
5df465df | 271 | } |
6d2f5c27 | 272 | |
362d3a3a JW |
273 | /* warn, but still let the driver load, if we don't know this chip */ |
274 | if (chip_unknown) | |
275 | nvt_pr(KERN_WARNING, "%s: unknown chip, id: 0x%02x 0x%02x, " | |
276 | "it may not work...", chip_id, chip_major, chip_minor); | |
277 | else | |
278 | nvt_dbg("%s: chip id: 0x%02x 0x%02x", | |
279 | chip_id, chip_major, chip_minor); | |
280 | ||
6d2f5c27 JW |
281 | nvt_efm_disable(nvt); |
282 | ||
283 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
284 | nvt->chip_major = chip_major; | |
285 | nvt->chip_minor = chip_minor; | |
286 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
287 | ||
288 | return ret; | |
289 | } | |
290 | ||
291 | static void nvt_cir_ldev_init(struct nvt_dev *nvt) | |
292 | { | |
39381d4f JW |
293 | u8 val, psreg, psmask, psval; |
294 | ||
295 | if (nvt->chip_major == CHIP_ID_HIGH_667) { | |
296 | psreg = CR_MULTIFUNC_PIN_SEL; | |
297 | psmask = MULTIFUNC_PIN_SEL_MASK; | |
298 | psval = MULTIFUNC_ENABLE_CIR | MULTIFUNC_ENABLE_CIRWB; | |
299 | } else { | |
300 | psreg = CR_OUTPUT_PIN_SEL; | |
301 | psmask = OUTPUT_PIN_SEL_MASK; | |
302 | psval = OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB; | |
303 | } | |
6d2f5c27 | 304 | |
39381d4f JW |
305 | /* output pin selection: enable CIR, with WB sensor enabled */ |
306 | val = nvt_cr_read(nvt, psreg); | |
307 | val &= psmask; | |
308 | val |= psval; | |
309 | nvt_cr_write(nvt, val, psreg); | |
6d2f5c27 JW |
310 | |
311 | /* Select CIR logical device and enable */ | |
312 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
313 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
314 | ||
315 | nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
316 | nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
317 | ||
318 | nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC); | |
319 | ||
320 | nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d", | |
321 | nvt->cir_addr, nvt->cir_irq); | |
322 | } | |
323 | ||
324 | static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt) | |
325 | { | |
326 | /* Select ACPI logical device, enable it and CIR Wake */ | |
327 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
328 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
329 | ||
330 | /* Enable CIR Wake via PSOUT# (Pin60) */ | |
331 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
332 | ||
333 | /* enable cir interrupt of mouse/keyboard IRQ event */ | |
334 | nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); | |
335 | ||
336 | /* enable pme interrupt of cir wakeup event */ | |
337 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
338 | ||
339 | /* Select CIR Wake logical device and enable */ | |
340 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
341 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
342 | ||
343 | nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
344 | nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
345 | ||
346 | nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC); | |
347 | ||
348 | nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d", | |
349 | nvt->cir_wake_addr, nvt->cir_wake_irq); | |
350 | } | |
351 | ||
352 | /* clear out the hardware's cir rx fifo */ | |
353 | static void nvt_clear_cir_fifo(struct nvt_dev *nvt) | |
354 | { | |
355 | u8 val; | |
356 | ||
357 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
358 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
359 | } | |
360 | ||
361 | /* clear out the hardware's cir wake rx fifo */ | |
362 | static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt) | |
363 | { | |
364 | u8 val; | |
365 | ||
366 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON); | |
367 | nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR, | |
368 | CIR_WAKE_FIFOCON); | |
369 | } | |
370 | ||
371 | /* clear out the hardware's cir tx fifo */ | |
372 | static void nvt_clear_tx_fifo(struct nvt_dev *nvt) | |
373 | { | |
374 | u8 val; | |
375 | ||
376 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
377 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON); | |
378 | } | |
379 | ||
fbdc781c JW |
380 | /* enable RX Trigger Level Reach and Packet End interrupts */ |
381 | static void nvt_set_cir_iren(struct nvt_dev *nvt) | |
382 | { | |
383 | u8 iren; | |
384 | ||
385 | iren = CIR_IREN_RTR | CIR_IREN_PE; | |
386 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
387 | } | |
388 | ||
6d2f5c27 JW |
389 | static void nvt_cir_regs_init(struct nvt_dev *nvt) |
390 | { | |
391 | /* set sample limit count (PE interrupt raised when reached) */ | |
392 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH); | |
393 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL); | |
394 | ||
395 | /* set fifo irq trigger levels */ | |
396 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV | | |
397 | CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON); | |
398 | ||
399 | /* | |
400 | * Enable TX and RX, specify carrier on = low, off = high, and set | |
401 | * sample period (currently 50us) | |
402 | */ | |
4e6e29ad JW |
403 | nvt_cir_reg_write(nvt, |
404 | CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
405 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
406 | CIR_IRCON); | |
6d2f5c27 JW |
407 | |
408 | /* clear hardware rx and tx fifos */ | |
409 | nvt_clear_cir_fifo(nvt); | |
410 | nvt_clear_tx_fifo(nvt); | |
411 | ||
412 | /* clear any and all stray interrupts */ | |
413 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
414 | ||
fbdc781c JW |
415 | /* and finally, enable interrupts */ |
416 | nvt_set_cir_iren(nvt); | |
6d2f5c27 JW |
417 | } |
418 | ||
419 | static void nvt_cir_wake_regs_init(struct nvt_dev *nvt) | |
420 | { | |
3198ed16 JW |
421 | /* set number of bytes needed for wake from s3 (default 65) */ |
422 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES, | |
423 | CIR_WAKE_FIFO_CMP_DEEP); | |
6d2f5c27 JW |
424 | |
425 | /* set tolerance/variance allowed per byte during wake compare */ | |
426 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE, | |
427 | CIR_WAKE_FIFO_CMP_TOL); | |
428 | ||
429 | /* set sample limit count (PE interrupt raised when reached) */ | |
430 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH); | |
431 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL); | |
432 | ||
433 | /* set cir wake fifo rx trigger level (currently 67) */ | |
434 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV, | |
435 | CIR_WAKE_FIFOCON); | |
436 | ||
437 | /* | |
438 | * Enable TX and RX, specific carrier on = low, off = high, and set | |
439 | * sample period (currently 50us) | |
440 | */ | |
441 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
442 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
443 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, | |
444 | CIR_WAKE_IRCON); | |
445 | ||
446 | /* clear cir wake rx fifo */ | |
447 | nvt_clear_cir_wake_fifo(nvt); | |
448 | ||
449 | /* clear any and all stray interrupts */ | |
450 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); | |
451 | } | |
452 | ||
453 | static void nvt_enable_wake(struct nvt_dev *nvt) | |
454 | { | |
455 | nvt_efm_enable(nvt); | |
456 | ||
457 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
458 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
459 | nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); | |
460 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
461 | ||
462 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
463 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
464 | ||
465 | nvt_efm_disable(nvt); | |
466 | ||
467 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
468 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
4e6e29ad JW |
469 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, |
470 | CIR_WAKE_IRCON); | |
6d2f5c27 JW |
471 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); |
472 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
473 | } | |
474 | ||
475 | /* rx carrier detect only works in learning mode, must be called w/nvt_lock */ | |
476 | static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt) | |
477 | { | |
478 | u32 count, carrier, duration = 0; | |
479 | int i; | |
480 | ||
481 | count = nvt_cir_reg_read(nvt, CIR_FCCL) | | |
482 | nvt_cir_reg_read(nvt, CIR_FCCH) << 8; | |
483 | ||
484 | for (i = 0; i < nvt->pkts; i++) { | |
485 | if (nvt->buf[i] & BUF_PULSE_BIT) | |
486 | duration += nvt->buf[i] & BUF_LEN_MASK; | |
487 | } | |
488 | ||
489 | duration *= SAMPLE_PERIOD; | |
490 | ||
491 | if (!count || !duration) { | |
492 | nvt_pr(KERN_NOTICE, "Unable to determine carrier! (c:%u, d:%u)", | |
493 | count, duration); | |
494 | return 0; | |
495 | } | |
496 | ||
b4608fae | 497 | carrier = MS_TO_NS(count) / duration; |
6d2f5c27 JW |
498 | |
499 | if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER)) | |
500 | nvt_dbg("WTF? Carrier frequency out of range!"); | |
501 | ||
502 | nvt_dbg("Carrier frequency: %u (count %u, duration %u)", | |
503 | carrier, count, duration); | |
504 | ||
505 | return carrier; | |
506 | } | |
507 | ||
508 | /* | |
509 | * set carrier frequency | |
510 | * | |
511 | * set carrier on 2 registers: CP & CC | |
512 | * always set CP as 0x81 | |
513 | * set CC by SPEC, CC = 3MHz/carrier - 1 | |
514 | */ | |
d8b4b582 | 515 | static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier) |
6d2f5c27 | 516 | { |
d8b4b582 | 517 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
518 | u16 val; |
519 | ||
48cafec9 DC |
520 | if (carrier == 0) |
521 | return -EINVAL; | |
522 | ||
6d2f5c27 JW |
523 | nvt_cir_reg_write(nvt, 1, CIR_CP); |
524 | val = 3000000 / (carrier) - 1; | |
525 | nvt_cir_reg_write(nvt, val & 0xff, CIR_CC); | |
526 | ||
527 | nvt_dbg("cp: 0x%x cc: 0x%x\n", | |
528 | nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC)); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | /* | |
534 | * nvt_tx_ir | |
535 | * | |
536 | * 1) clean TX fifo first (handled by AP) | |
537 | * 2) copy data from user space | |
538 | * 3) disable RX interrupts, enable TX interrupts: TTR & TFU | |
539 | * 4) send 9 packets to TX FIFO to open TTR | |
540 | * in interrupt_handler: | |
541 | * 5) send all data out | |
542 | * go back to write(): | |
543 | * 6) disable TX interrupts, re-enable RX interupts | |
544 | * | |
545 | * The key problem of this function is user space data may larger than | |
546 | * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to | |
547 | * buf, and keep current copied data buf num in cur_buf_num. But driver's buf | |
548 | * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to | |
549 | * set TXFCONT as 0xff, until buf_count less than 0xff. | |
550 | */ | |
5588dc2b | 551 | static int nvt_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned n) |
6d2f5c27 | 552 | { |
d8b4b582 | 553 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 | 554 | unsigned long flags; |
6d2f5c27 JW |
555 | unsigned int i; |
556 | u8 iren; | |
557 | int ret; | |
558 | ||
559 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
560 | ||
5588dc2b DH |
561 | ret = min((unsigned)(TX_BUF_LEN / sizeof(unsigned)), n); |
562 | nvt->tx.buf_count = (ret * sizeof(unsigned)); | |
6d2f5c27 JW |
563 | |
564 | memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count); | |
565 | ||
566 | nvt->tx.cur_buf_num = 0; | |
567 | ||
568 | /* save currently enabled interrupts */ | |
569 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
570 | ||
571 | /* now disable all interrupts, save TFU & TTR */ | |
572 | nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN); | |
573 | ||
574 | nvt->tx.tx_state = ST_TX_REPLY; | |
575 | ||
576 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 | | |
577 | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
578 | ||
579 | /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */ | |
580 | for (i = 0; i < 9; i++) | |
581 | nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO); | |
582 | ||
583 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
584 | ||
585 | wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST); | |
586 | ||
587 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
588 | nvt->tx.tx_state = ST_TX_NONE; | |
589 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
590 | ||
591 | /* restore enabled interrupts to prior state */ | |
592 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
593 | ||
594 | return ret; | |
595 | } | |
596 | ||
597 | /* dump contents of the last rx buffer we got from the hw rx fifo */ | |
598 | static void nvt_dump_rx_buf(struct nvt_dev *nvt) | |
599 | { | |
600 | int i; | |
601 | ||
4e6e29ad | 602 | printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts); |
6d2f5c27 | 603 | for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++) |
4e6e29ad JW |
604 | printk(KERN_CONT "0x%02x ", nvt->buf[i]); |
605 | printk(KERN_CONT "\n"); | |
6d2f5c27 JW |
606 | } |
607 | ||
608 | /* | |
609 | * Process raw data in rx driver buffer, store it in raw IR event kfifo, | |
610 | * trigger decode when appropriate. | |
611 | * | |
612 | * We get IR data samples one byte at a time. If the msb is set, its a pulse, | |
613 | * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD | |
614 | * (default 50us) intervals for that pulse/space. A discrete signal is | |
615 | * followed by a series of 0x7f packets, then either 0x7<something> or 0x80 | |
616 | * to signal more IR coming (repeats) or end of IR, respectively. We store | |
617 | * sample data in the raw event kfifo until we see 0x7<something> (except f) | |
618 | * or 0x80, at which time, we trigger a decode operation. | |
619 | */ | |
620 | static void nvt_process_rx_ir_data(struct nvt_dev *nvt) | |
621 | { | |
4651918a | 622 | DEFINE_IR_RAW_EVENT(rawir); |
6d2f5c27 JW |
623 | u32 carrier; |
624 | u8 sample; | |
625 | int i; | |
626 | ||
627 | nvt_dbg_verbose("%s firing", __func__); | |
628 | ||
629 | if (debug) | |
630 | nvt_dump_rx_buf(nvt); | |
631 | ||
632 | if (nvt->carrier_detect_enabled) | |
633 | carrier = nvt_rx_carrier_detect(nvt); | |
634 | ||
de4ed0c1 | 635 | nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts); |
6d2f5c27 | 636 | |
b7582815 JW |
637 | init_ir_raw_event(&rawir); |
638 | ||
de4ed0c1 | 639 | for (i = 0; i < nvt->pkts; i++) { |
6d2f5c27 JW |
640 | sample = nvt->buf[i]; |
641 | ||
642 | rawir.pulse = ((sample & BUF_PULSE_BIT) != 0); | |
b4608fae JW |
643 | rawir.duration = US_TO_NS((sample & BUF_LEN_MASK) |
644 | * SAMPLE_PERIOD); | |
6d2f5c27 | 645 | |
de4ed0c1 JW |
646 | nvt_dbg("Storing %s with duration %d", |
647 | rawir.pulse ? "pulse" : "space", rawir.duration); | |
4651918a | 648 | |
de4ed0c1 | 649 | ir_raw_event_store_with_filter(nvt->rdev, &rawir); |
6d2f5c27 JW |
650 | |
651 | /* | |
652 | * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE | |
653 | * indicates end of IR signal, but new data incoming. In both | |
654 | * cases, it means we're ready to call ir_raw_event_handle | |
655 | */ | |
de4ed0c1 | 656 | if ((sample == BUF_PULSE_BIT) && (i + 1 < nvt->pkts)) { |
b7582815 | 657 | nvt_dbg("Calling ir_raw_event_handle (signal end)\n"); |
6d2f5c27 | 658 | ir_raw_event_handle(nvt->rdev); |
b7582815 | 659 | } |
6d2f5c27 JW |
660 | } |
661 | ||
de4ed0c1 JW |
662 | nvt->pkts = 0; |
663 | ||
b7582815 JW |
664 | nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n"); |
665 | ir_raw_event_handle(nvt->rdev); | |
666 | ||
6d2f5c27 JW |
667 | nvt_dbg_verbose("%s done", __func__); |
668 | } | |
669 | ||
fbdc781c JW |
670 | static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt) |
671 | { | |
672 | nvt_pr(KERN_WARNING, "RX FIFO overrun detected, flushing data!"); | |
673 | ||
674 | nvt->pkts = 0; | |
675 | nvt_clear_cir_fifo(nvt); | |
676 | ir_raw_event_reset(nvt->rdev); | |
677 | } | |
678 | ||
6d2f5c27 JW |
679 | /* copy data from hardware rx fifo into driver buffer */ |
680 | static void nvt_get_rx_ir_data(struct nvt_dev *nvt) | |
681 | { | |
682 | unsigned long flags; | |
683 | u8 fifocount, val; | |
684 | unsigned int b_idx; | |
fbdc781c | 685 | bool overrun = false; |
6d2f5c27 JW |
686 | int i; |
687 | ||
688 | /* Get count of how many bytes to read from RX FIFO */ | |
689 | fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT); | |
690 | /* if we get 0xff, probably means the logical dev is disabled */ | |
691 | if (fifocount == 0xff) | |
692 | return; | |
fbdc781c | 693 | /* watch out for a fifo overrun condition */ |
6d2f5c27 | 694 | else if (fifocount > RX_BUF_LEN) { |
fbdc781c JW |
695 | overrun = true; |
696 | fifocount = RX_BUF_LEN; | |
6d2f5c27 JW |
697 | } |
698 | ||
699 | nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount); | |
700 | ||
701 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
702 | ||
703 | b_idx = nvt->pkts; | |
704 | ||
705 | /* This should never happen, but lets check anyway... */ | |
706 | if (b_idx + fifocount > RX_BUF_LEN) { | |
707 | nvt_process_rx_ir_data(nvt); | |
708 | b_idx = 0; | |
709 | } | |
710 | ||
711 | /* Read fifocount bytes from CIR Sample RX FIFO register */ | |
712 | for (i = 0; i < fifocount; i++) { | |
713 | val = nvt_cir_reg_read(nvt, CIR_SRXFIFO); | |
714 | nvt->buf[b_idx + i] = val; | |
715 | } | |
716 | ||
717 | nvt->pkts += fifocount; | |
718 | nvt_dbg("%s: pkts now %d", __func__, nvt->pkts); | |
719 | ||
720 | nvt_process_rx_ir_data(nvt); | |
721 | ||
fbdc781c JW |
722 | if (overrun) |
723 | nvt_handle_rx_fifo_overrun(nvt); | |
724 | ||
6d2f5c27 JW |
725 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); |
726 | } | |
727 | ||
728 | static void nvt_cir_log_irqs(u8 status, u8 iren) | |
729 | { | |
730 | nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s", | |
731 | status, iren, | |
732 | status & CIR_IRSTS_RDR ? " RDR" : "", | |
733 | status & CIR_IRSTS_RTR ? " RTR" : "", | |
734 | status & CIR_IRSTS_PE ? " PE" : "", | |
735 | status & CIR_IRSTS_RFO ? " RFO" : "", | |
736 | status & CIR_IRSTS_TE ? " TE" : "", | |
737 | status & CIR_IRSTS_TTR ? " TTR" : "", | |
738 | status & CIR_IRSTS_TFU ? " TFU" : "", | |
739 | status & CIR_IRSTS_GH ? " GH" : "", | |
740 | status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE | | |
741 | CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR | | |
742 | CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : ""); | |
743 | } | |
744 | ||
745 | static bool nvt_cir_tx_inactive(struct nvt_dev *nvt) | |
746 | { | |
747 | unsigned long flags; | |
748 | bool tx_inactive; | |
749 | u8 tx_state; | |
750 | ||
751 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
752 | tx_state = nvt->tx.tx_state; | |
753 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
754 | ||
755 | tx_inactive = (tx_state == ST_TX_NONE); | |
756 | ||
757 | return tx_inactive; | |
758 | } | |
759 | ||
760 | /* interrupt service routine for incoming and outgoing CIR data */ | |
761 | static irqreturn_t nvt_cir_isr(int irq, void *data) | |
762 | { | |
763 | struct nvt_dev *nvt = data; | |
764 | u8 status, iren, cur_state; | |
765 | unsigned long flags; | |
766 | ||
767 | nvt_dbg_verbose("%s firing", __func__); | |
768 | ||
769 | nvt_efm_enable(nvt); | |
770 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
771 | nvt_efm_disable(nvt); | |
772 | ||
773 | /* | |
774 | * Get IR Status register contents. Write 1 to ack/clear | |
775 | * | |
776 | * bit: reg name - description | |
777 | * 7: CIR_IRSTS_RDR - RX Data Ready | |
778 | * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach | |
779 | * 5: CIR_IRSTS_PE - Packet End | |
780 | * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set) | |
781 | * 3: CIR_IRSTS_TE - TX FIFO Empty | |
782 | * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach | |
783 | * 1: CIR_IRSTS_TFU - TX FIFO Underrun | |
784 | * 0: CIR_IRSTS_GH - Min Length Detected | |
785 | */ | |
786 | status = nvt_cir_reg_read(nvt, CIR_IRSTS); | |
787 | if (!status) { | |
788 | nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__); | |
789 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
790 | return IRQ_RETVAL(IRQ_NONE); | |
791 | } | |
792 | ||
793 | /* ack/clear all irq flags we've got */ | |
794 | nvt_cir_reg_write(nvt, status, CIR_IRSTS); | |
795 | nvt_cir_reg_write(nvt, 0, CIR_IRSTS); | |
796 | ||
797 | /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */ | |
798 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
799 | if (!iren) { | |
800 | nvt_dbg_verbose("%s exiting, CIR not enabled", __func__); | |
801 | return IRQ_RETVAL(IRQ_NONE); | |
802 | } | |
803 | ||
804 | if (debug) | |
805 | nvt_cir_log_irqs(status, iren); | |
806 | ||
807 | if (status & CIR_IRSTS_RTR) { | |
808 | /* FIXME: add code for study/learn mode */ | |
809 | /* We only do rx if not tx'ing */ | |
810 | if (nvt_cir_tx_inactive(nvt)) | |
811 | nvt_get_rx_ir_data(nvt); | |
812 | } | |
813 | ||
814 | if (status & CIR_IRSTS_PE) { | |
815 | if (nvt_cir_tx_inactive(nvt)) | |
816 | nvt_get_rx_ir_data(nvt); | |
817 | ||
818 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
819 | ||
820 | cur_state = nvt->study_state; | |
821 | ||
822 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
823 | ||
824 | if (cur_state == ST_STUDY_NONE) | |
825 | nvt_clear_cir_fifo(nvt); | |
826 | } | |
827 | ||
828 | if (status & CIR_IRSTS_TE) | |
829 | nvt_clear_tx_fifo(nvt); | |
830 | ||
831 | if (status & CIR_IRSTS_TTR) { | |
832 | unsigned int pos, count; | |
833 | u8 tmp; | |
834 | ||
835 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
836 | ||
837 | pos = nvt->tx.cur_buf_num; | |
838 | count = nvt->tx.buf_count; | |
839 | ||
840 | /* Write data into the hardware tx fifo while pos < count */ | |
841 | if (pos < count) { | |
842 | nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO); | |
843 | nvt->tx.cur_buf_num++; | |
844 | /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */ | |
845 | } else { | |
846 | tmp = nvt_cir_reg_read(nvt, CIR_IREN); | |
847 | nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN); | |
848 | } | |
849 | ||
850 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
851 | ||
852 | } | |
853 | ||
854 | if (status & CIR_IRSTS_TFU) { | |
855 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
856 | if (nvt->tx.tx_state == ST_TX_REPLY) { | |
857 | nvt->tx.tx_state = ST_TX_REQUEST; | |
858 | wake_up(&nvt->tx.queue); | |
859 | } | |
860 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
861 | } | |
862 | ||
863 | nvt_dbg_verbose("%s done", __func__); | |
864 | return IRQ_RETVAL(IRQ_HANDLED); | |
865 | } | |
866 | ||
867 | /* Interrupt service routine for CIR Wake */ | |
868 | static irqreturn_t nvt_cir_wake_isr(int irq, void *data) | |
869 | { | |
870 | u8 status, iren, val; | |
871 | struct nvt_dev *nvt = data; | |
872 | unsigned long flags; | |
873 | ||
874 | nvt_dbg_wake("%s firing", __func__); | |
875 | ||
876 | status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS); | |
877 | if (!status) | |
878 | return IRQ_RETVAL(IRQ_NONE); | |
879 | ||
880 | if (status & CIR_WAKE_IRSTS_IR_PENDING) | |
881 | nvt_clear_cir_wake_fifo(nvt); | |
882 | ||
883 | nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS); | |
884 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS); | |
885 | ||
886 | /* Interrupt may be shared with CIR, bail if Wake not enabled */ | |
887 | iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN); | |
888 | if (!iren) { | |
889 | nvt_dbg_wake("%s exiting, wake not enabled", __func__); | |
890 | return IRQ_RETVAL(IRQ_HANDLED); | |
891 | } | |
892 | ||
893 | if ((status & CIR_WAKE_IRSTS_PE) && | |
894 | (nvt->wake_state == ST_WAKE_START)) { | |
895 | while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) { | |
896 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY); | |
897 | nvt_dbg("setting wake up key: 0x%x", val); | |
898 | } | |
899 | ||
900 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
901 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
902 | nvt->wake_state = ST_WAKE_FINISH; | |
903 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
904 | } | |
905 | ||
906 | nvt_dbg_wake("%s done", __func__); | |
907 | return IRQ_RETVAL(IRQ_HANDLED); | |
908 | } | |
909 | ||
910 | static void nvt_enable_cir(struct nvt_dev *nvt) | |
911 | { | |
912 | /* set function enable flags */ | |
913 | nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
914 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
915 | CIR_IRCON); | |
916 | ||
917 | nvt_efm_enable(nvt); | |
918 | ||
919 | /* enable the CIR logical device */ | |
920 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
921 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
922 | ||
923 | nvt_efm_disable(nvt); | |
924 | ||
925 | /* clear all pending interrupts */ | |
926 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
927 | ||
928 | /* enable interrupts */ | |
fbdc781c | 929 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
930 | } |
931 | ||
932 | static void nvt_disable_cir(struct nvt_dev *nvt) | |
933 | { | |
934 | /* disable CIR interrupts */ | |
935 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
936 | ||
937 | /* clear any and all pending interrupts */ | |
938 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
939 | ||
940 | /* clear all function enable flags */ | |
941 | nvt_cir_reg_write(nvt, 0, CIR_IRCON); | |
942 | ||
943 | /* clear hardware rx and tx fifos */ | |
944 | nvt_clear_cir_fifo(nvt); | |
945 | nvt_clear_tx_fifo(nvt); | |
946 | ||
947 | nvt_efm_enable(nvt); | |
948 | ||
949 | /* disable the CIR logical device */ | |
950 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
951 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
952 | ||
953 | nvt_efm_disable(nvt); | |
954 | } | |
955 | ||
d8b4b582 | 956 | static int nvt_open(struct rc_dev *dev) |
6d2f5c27 | 957 | { |
d8b4b582 | 958 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
959 | unsigned long flags; |
960 | ||
961 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
6d2f5c27 JW |
962 | nvt_enable_cir(nvt); |
963 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
d8b4b582 | 968 | static void nvt_close(struct rc_dev *dev) |
6d2f5c27 | 969 | { |
d8b4b582 | 970 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
971 | unsigned long flags; |
972 | ||
973 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
6d2f5c27 JW |
974 | nvt_disable_cir(nvt); |
975 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
976 | } | |
977 | ||
978 | /* Allocate memory, probe hardware, and initialize everything */ | |
979 | static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) | |
980 | { | |
d8b4b582 DH |
981 | struct nvt_dev *nvt; |
982 | struct rc_dev *rdev; | |
6d2f5c27 JW |
983 | int ret = -ENOMEM; |
984 | ||
985 | nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL); | |
986 | if (!nvt) | |
987 | return ret; | |
988 | ||
6d2f5c27 | 989 | /* input device for IR remote (and tx) */ |
d8b4b582 | 990 | rdev = rc_allocate_device(); |
6d2f5c27 JW |
991 | if (!rdev) |
992 | goto failure; | |
993 | ||
994 | ret = -ENODEV; | |
995 | /* validate pnp resources */ | |
996 | if (!pnp_port_valid(pdev, 0) || | |
997 | pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) { | |
998 | dev_err(&pdev->dev, "IR PNP Port not valid!\n"); | |
999 | goto failure; | |
1000 | } | |
1001 | ||
1002 | if (!pnp_irq_valid(pdev, 0)) { | |
1003 | dev_err(&pdev->dev, "PNP IRQ not valid!\n"); | |
1004 | goto failure; | |
1005 | } | |
1006 | ||
1007 | if (!pnp_port_valid(pdev, 1) || | |
1008 | pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) { | |
1009 | dev_err(&pdev->dev, "Wake PNP Port not valid!\n"); | |
1010 | goto failure; | |
1011 | } | |
1012 | ||
1013 | nvt->cir_addr = pnp_port_start(pdev, 0); | |
1014 | nvt->cir_irq = pnp_irq(pdev, 0); | |
1015 | ||
1016 | nvt->cir_wake_addr = pnp_port_start(pdev, 1); | |
1017 | /* irq is always shared between cir and cir wake */ | |
1018 | nvt->cir_wake_irq = nvt->cir_irq; | |
1019 | ||
1020 | nvt->cr_efir = CR_EFIR; | |
1021 | nvt->cr_efdr = CR_EFDR; | |
1022 | ||
1023 | spin_lock_init(&nvt->nvt_lock); | |
1024 | spin_lock_init(&nvt->tx.lock); | |
1025 | ||
6d2f5c27 JW |
1026 | pnp_set_drvdata(pdev, nvt); |
1027 | nvt->pdev = pdev; | |
1028 | ||
1029 | init_waitqueue_head(&nvt->tx.queue); | |
1030 | ||
1031 | ret = nvt_hw_detect(nvt); | |
1032 | if (ret) | |
1033 | goto failure; | |
1034 | ||
1035 | /* Initialize CIR & CIR Wake Logical Devices */ | |
1036 | nvt_efm_enable(nvt); | |
1037 | nvt_cir_ldev_init(nvt); | |
1038 | nvt_cir_wake_ldev_init(nvt); | |
1039 | nvt_efm_disable(nvt); | |
1040 | ||
1041 | /* Initialize CIR & CIR Wake Config Registers */ | |
1042 | nvt_cir_regs_init(nvt); | |
1043 | nvt_cir_wake_regs_init(nvt); | |
1044 | ||
d8b4b582 DH |
1045 | /* Set up the rc device */ |
1046 | rdev->priv = nvt; | |
1047 | rdev->driver_type = RC_DRIVER_IR_RAW; | |
c003ab1b | 1048 | rdev->allowed_protos = RC_BIT_ALL; |
d8b4b582 DH |
1049 | rdev->open = nvt_open; |
1050 | rdev->close = nvt_close; | |
1051 | rdev->tx_ir = nvt_tx_ir; | |
1052 | rdev->s_tx_carrier = nvt_set_tx_carrier; | |
1053 | rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver"; | |
46872d27 | 1054 | rdev->input_phys = "nuvoton/cir0"; |
d8b4b582 DH |
1055 | rdev->input_id.bustype = BUS_HOST; |
1056 | rdev->input_id.vendor = PCI_VENDOR_ID_WINBOND2; | |
1057 | rdev->input_id.product = nvt->chip_major; | |
1058 | rdev->input_id.version = nvt->chip_minor; | |
46872d27 | 1059 | rdev->dev.parent = &pdev->dev; |
d8b4b582 DH |
1060 | rdev->driver_name = NVT_DRIVER_NAME; |
1061 | rdev->map_name = RC_MAP_RC6_MCE; | |
d7b290a1 | 1062 | rdev->timeout = MS_TO_NS(100); |
46872d27 JW |
1063 | /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */ |
1064 | rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD); | |
6d2f5c27 | 1065 | #if 0 |
d8b4b582 DH |
1066 | rdev->min_timeout = XYZ; |
1067 | rdev->max_timeout = XYZ; | |
6d2f5c27 | 1068 | /* tx bits */ |
d8b4b582 | 1069 | rdev->tx_resolution = XYZ; |
6d2f5c27 | 1070 | #endif |
6d2f5c27 | 1071 | |
9ef449c6 LH |
1072 | ret = -EBUSY; |
1073 | /* now claim resources */ | |
1074 | if (!request_region(nvt->cir_addr, | |
1075 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
1076 | goto failure; | |
1077 | ||
1078 | if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED, | |
1079 | NVT_DRIVER_NAME, (void *)nvt)) | |
f27b853e | 1080 | goto failure2; |
9ef449c6 LH |
1081 | |
1082 | if (!request_region(nvt->cir_wake_addr, | |
1083 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
f27b853e | 1084 | goto failure3; |
9ef449c6 LH |
1085 | |
1086 | if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED, | |
1087 | NVT_DRIVER_NAME, (void *)nvt)) | |
f27b853e | 1088 | goto failure4; |
9ef449c6 | 1089 | |
d8b4b582 | 1090 | ret = rc_register_device(rdev); |
6d2f5c27 | 1091 | if (ret) |
f27b853e | 1092 | goto failure5; |
6d2f5c27 | 1093 | |
46872d27 | 1094 | device_init_wakeup(&pdev->dev, true); |
d8b4b582 | 1095 | nvt->rdev = rdev; |
6d2f5c27 JW |
1096 | nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n"); |
1097 | if (debug) { | |
1098 | cir_dump_regs(nvt); | |
1099 | cir_wake_dump_regs(nvt); | |
1100 | } | |
1101 | ||
1102 | return 0; | |
1103 | ||
f27b853e BH |
1104 | failure5: |
1105 | free_irq(nvt->cir_wake_irq, nvt); | |
1106 | failure4: | |
1107 | release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH); | |
1108 | failure3: | |
1109 | free_irq(nvt->cir_irq, nvt); | |
1110 | failure2: | |
1111 | release_region(nvt->cir_addr, CIR_IOREG_LENGTH); | |
6d2f5c27 | 1112 | failure: |
d8b4b582 | 1113 | rc_free_device(rdev); |
6d2f5c27 JW |
1114 | kfree(nvt); |
1115 | ||
1116 | return ret; | |
1117 | } | |
1118 | ||
1119 | static void __devexit nvt_remove(struct pnp_dev *pdev) | |
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 | { | |
1179 | int ret = 0; | |
1180 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1181 | ||
1182 | nvt_dbg("%s called", __func__); | |
1183 | ||
1184 | /* open interrupt */ | |
fbdc781c | 1185 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
1186 | |
1187 | /* Enable CIR logical device */ | |
1188 | nvt_efm_enable(nvt); | |
1189 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
1190 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
1191 | ||
1192 | nvt_efm_disable(nvt); | |
1193 | ||
1194 | nvt_cir_regs_init(nvt); | |
1195 | nvt_cir_wake_regs_init(nvt); | |
1196 | ||
1197 | return ret; | |
1198 | } | |
1199 | ||
1200 | static void nvt_shutdown(struct pnp_dev *pdev) | |
1201 | { | |
1202 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1203 | nvt_enable_wake(nvt); | |
1204 | } | |
1205 | ||
1206 | static const struct pnp_device_id nvt_ids[] = { | |
1207 | { "WEC0530", 0 }, /* CIR */ | |
1208 | { "NTN0530", 0 }, /* CIR for new chip's pnp id*/ | |
1209 | { "", 0 }, | |
1210 | }; | |
1211 | ||
1212 | static struct pnp_driver nvt_driver = { | |
1213 | .name = NVT_DRIVER_NAME, | |
1214 | .id_table = nvt_ids, | |
1215 | .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, | |
1216 | .probe = nvt_probe, | |
1217 | .remove = __devexit_p(nvt_remove), | |
1218 | .suspend = nvt_suspend, | |
1219 | .resume = nvt_resume, | |
1220 | .shutdown = nvt_shutdown, | |
1221 | }; | |
1222 | ||
1223 | int nvt_init(void) | |
1224 | { | |
1225 | return pnp_register_driver(&nvt_driver); | |
1226 | } | |
1227 | ||
1228 | void nvt_exit(void) | |
1229 | { | |
1230 | pnp_unregister_driver(&nvt_driver); | |
1231 | } | |
1232 | ||
1233 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
1234 | MODULE_PARM_DESC(debug, "Enable debugging output"); | |
1235 | ||
1236 | MODULE_DEVICE_TABLE(pnp, nvt_ids); | |
1237 | MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver"); | |
1238 | ||
1239 | MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>"); | |
1240 | MODULE_LICENSE("GPL"); | |
1241 | ||
1242 | module_init(nvt_init); | |
1243 | module_exit(nvt_exit); |