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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 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/pnp.h> | |
31 | #include <linux/io.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/sched.h> | |
34 | #include <linux/slab.h> | |
6bda9644 | 35 | #include <media/rc-core.h> |
6d2f5c27 JW |
36 | #include <linux/pci_ids.h> |
37 | ||
38 | #include "nuvoton-cir.h" | |
39 | ||
6d2f5c27 JW |
40 | /* write val to config reg */ |
41 | static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg) | |
42 | { | |
43 | outb(reg, nvt->cr_efir); | |
44 | outb(val, nvt->cr_efdr); | |
45 | } | |
46 | ||
47 | /* read val from config reg */ | |
48 | static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg) | |
49 | { | |
50 | outb(reg, nvt->cr_efir); | |
51 | return inb(nvt->cr_efdr); | |
52 | } | |
53 | ||
54 | /* update config register bit without changing other bits */ | |
55 | static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
56 | { | |
57 | u8 tmp = nvt_cr_read(nvt, reg) | val; | |
58 | nvt_cr_write(nvt, tmp, reg); | |
59 | } | |
60 | ||
61 | /* clear config register bit without changing other bits */ | |
62 | static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
63 | { | |
64 | u8 tmp = nvt_cr_read(nvt, reg) & ~val; | |
65 | nvt_cr_write(nvt, tmp, reg); | |
66 | } | |
67 | ||
68 | /* enter extended function mode */ | |
69 | static inline void nvt_efm_enable(struct nvt_dev *nvt) | |
70 | { | |
71 | /* Enabling Extended Function Mode explicitly requires writing 2x */ | |
72 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
73 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
74 | } | |
75 | ||
76 | /* exit extended function mode */ | |
77 | static inline void nvt_efm_disable(struct nvt_dev *nvt) | |
78 | { | |
79 | outb(EFER_EFM_DISABLE, nvt->cr_efir); | |
80 | } | |
81 | ||
82 | /* | |
83 | * When you want to address a specific logical device, write its logical | |
84 | * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing | |
85 | * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN. | |
86 | */ | |
87 | static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev) | |
88 | { | |
89 | outb(CR_LOGICAL_DEV_SEL, nvt->cr_efir); | |
90 | outb(ldev, nvt->cr_efdr); | |
91 | } | |
92 | ||
93 | /* write val to cir config register */ | |
94 | static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset) | |
95 | { | |
96 | outb(val, nvt->cir_addr + offset); | |
97 | } | |
98 | ||
99 | /* read val from cir config register */ | |
100 | static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset) | |
101 | { | |
102 | u8 val; | |
103 | ||
104 | val = inb(nvt->cir_addr + offset); | |
105 | ||
106 | return val; | |
107 | } | |
108 | ||
109 | /* write val to cir wake register */ | |
110 | static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt, | |
111 | u8 val, u8 offset) | |
112 | { | |
113 | outb(val, nvt->cir_wake_addr + offset); | |
114 | } | |
115 | ||
116 | /* read val from cir wake config register */ | |
117 | static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset) | |
118 | { | |
119 | u8 val; | |
120 | ||
121 | val = inb(nvt->cir_wake_addr + offset); | |
122 | ||
123 | return val; | |
124 | } | |
125 | ||
4e6e29ad JW |
126 | #define pr_reg(text, ...) \ |
127 | printk(KERN_INFO KBUILD_MODNAME ": " text, ## __VA_ARGS__) | |
128 | ||
6d2f5c27 JW |
129 | /* dump current cir register contents */ |
130 | static void cir_dump_regs(struct nvt_dev *nvt) | |
131 | { | |
132 | nvt_efm_enable(nvt); | |
133 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
134 | ||
4e6e29ad JW |
135 | pr_reg("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME); |
136 | pr_reg(" * CR CIR ACTIVE : 0x%x\n", | |
6d2f5c27 | 137 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); |
4e6e29ad | 138 | pr_reg(" * CR CIR BASE ADDR: 0x%x\n", |
6d2f5c27 JW |
139 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | |
140 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); | |
4e6e29ad | 141 | pr_reg(" * CR CIR IRQ NUM: 0x%x\n", |
6d2f5c27 JW |
142 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); |
143 | ||
144 | nvt_efm_disable(nvt); | |
145 | ||
4e6e29ad JW |
146 | pr_reg("%s: Dump CIR registers:\n", NVT_DRIVER_NAME); |
147 | pr_reg(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON)); | |
148 | pr_reg(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS)); | |
149 | pr_reg(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN)); | |
150 | pr_reg(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT)); | |
151 | pr_reg(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP)); | |
152 | pr_reg(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC)); | |
153 | pr_reg(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH)); | |
154 | pr_reg(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL)); | |
155 | pr_reg(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON)); | |
156 | pr_reg(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS)); | |
157 | pr_reg(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO)); | |
158 | pr_reg(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT)); | |
159 | pr_reg(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO)); | |
160 | pr_reg(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH)); | |
161 | pr_reg(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL)); | |
162 | pr_reg(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM)); | |
6d2f5c27 JW |
163 | } |
164 | ||
165 | /* dump current cir wake register contents */ | |
166 | static void cir_wake_dump_regs(struct nvt_dev *nvt) | |
167 | { | |
168 | u8 i, fifo_len; | |
169 | ||
170 | nvt_efm_enable(nvt); | |
171 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
172 | ||
4e6e29ad | 173 | pr_reg("%s: Dump CIR WAKE logical device registers:\n", |
6d2f5c27 | 174 | NVT_DRIVER_NAME); |
4e6e29ad | 175 | pr_reg(" * CR CIR WAKE ACTIVE : 0x%x\n", |
6d2f5c27 | 176 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); |
4e6e29ad | 177 | pr_reg(" * CR CIR WAKE BASE ADDR: 0x%x\n", |
6d2f5c27 | 178 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | |
4e6e29ad JW |
179 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); |
180 | pr_reg(" * CR CIR WAKE IRQ NUM: 0x%x\n", | |
6d2f5c27 JW |
181 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); |
182 | ||
183 | nvt_efm_disable(nvt); | |
184 | ||
4e6e29ad JW |
185 | pr_reg("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME); |
186 | pr_reg(" * IRCON: 0x%x\n", | |
6d2f5c27 | 187 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON)); |
4e6e29ad | 188 | pr_reg(" * IRSTS: 0x%x\n", |
6d2f5c27 | 189 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS)); |
4e6e29ad | 190 | pr_reg(" * IREN: 0x%x\n", |
6d2f5c27 | 191 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN)); |
4e6e29ad | 192 | pr_reg(" * FIFO CMP DEEP: 0x%x\n", |
6d2f5c27 | 193 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP)); |
4e6e29ad | 194 | pr_reg(" * FIFO CMP TOL: 0x%x\n", |
6d2f5c27 | 195 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL)); |
4e6e29ad | 196 | pr_reg(" * FIFO COUNT: 0x%x\n", |
6d2f5c27 | 197 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT)); |
4e6e29ad | 198 | pr_reg(" * SLCH: 0x%x\n", |
6d2f5c27 | 199 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH)); |
4e6e29ad | 200 | pr_reg(" * SLCL: 0x%x\n", |
6d2f5c27 | 201 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL)); |
4e6e29ad | 202 | pr_reg(" * FIFOCON: 0x%x\n", |
6d2f5c27 | 203 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON)); |
4e6e29ad | 204 | pr_reg(" * SRXFSTS: 0x%x\n", |
6d2f5c27 | 205 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS)); |
4e6e29ad | 206 | pr_reg(" * SAMPLE RX FIFO: 0x%x\n", |
6d2f5c27 | 207 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO)); |
4e6e29ad | 208 | pr_reg(" * WR FIFO DATA: 0x%x\n", |
6d2f5c27 | 209 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA)); |
4e6e29ad | 210 | pr_reg(" * RD FIFO ONLY: 0x%x\n", |
6d2f5c27 | 211 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); |
4e6e29ad | 212 | pr_reg(" * RD FIFO ONLY IDX: 0x%x\n", |
6d2f5c27 | 213 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)); |
4e6e29ad | 214 | pr_reg(" * FIFO IGNORE: 0x%x\n", |
6d2f5c27 | 215 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE)); |
4e6e29ad | 216 | pr_reg(" * IRFSM: 0x%x\n", |
6d2f5c27 JW |
217 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM)); |
218 | ||
219 | fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT); | |
4e6e29ad JW |
220 | pr_reg("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len); |
221 | pr_reg("* Contents = "); | |
6d2f5c27 | 222 | for (i = 0; i < fifo_len; i++) |
4e6e29ad | 223 | printk(KERN_CONT "%02x ", |
6d2f5c27 | 224 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); |
4e6e29ad | 225 | printk(KERN_CONT "\n"); |
6d2f5c27 JW |
226 | } |
227 | ||
228 | /* detect hardware features */ | |
229 | static int nvt_hw_detect(struct nvt_dev *nvt) | |
230 | { | |
231 | unsigned long flags; | |
232 | u8 chip_major, chip_minor; | |
233 | int ret = 0; | |
362d3a3a JW |
234 | char chip_id[12]; |
235 | bool chip_unknown = false; | |
6d2f5c27 JW |
236 | |
237 | nvt_efm_enable(nvt); | |
238 | ||
239 | /* Check if we're wired for the alternate EFER setup */ | |
240 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
241 | if (chip_major == 0xff) { | |
242 | nvt->cr_efir = CR_EFIR2; | |
243 | nvt->cr_efdr = CR_EFDR2; | |
244 | nvt_efm_enable(nvt); | |
245 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
246 | } | |
247 | ||
248 | chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO); | |
6d2f5c27 | 249 | |
362d3a3a JW |
250 | /* these are the known working chip revisions... */ |
251 | switch (chip_major) { | |
252 | case CHIP_ID_HIGH_667: | |
253 | strcpy(chip_id, "w83667hg\0"); | |
254 | if (chip_minor != CHIP_ID_LOW_667) | |
255 | chip_unknown = true; | |
256 | break; | |
257 | case CHIP_ID_HIGH_677B: | |
258 | strcpy(chip_id, "w83677hg\0"); | |
259 | if (chip_minor != CHIP_ID_LOW_677B2 && | |
260 | chip_minor != CHIP_ID_LOW_677B3) | |
261 | chip_unknown = true; | |
262 | break; | |
263 | case CHIP_ID_HIGH_677C: | |
264 | strcpy(chip_id, "w83677hg-c\0"); | |
265 | if (chip_minor != CHIP_ID_LOW_677C) | |
266 | chip_unknown = true; | |
267 | break; | |
268 | default: | |
269 | strcpy(chip_id, "w836x7hg\0"); | |
270 | chip_unknown = true; | |
271 | break; | |
5df465df | 272 | } |
6d2f5c27 | 273 | |
362d3a3a JW |
274 | /* warn, but still let the driver load, if we don't know this chip */ |
275 | if (chip_unknown) | |
276 | nvt_pr(KERN_WARNING, "%s: unknown chip, id: 0x%02x 0x%02x, " | |
277 | "it may not work...", chip_id, chip_major, chip_minor); | |
278 | else | |
279 | nvt_dbg("%s: chip id: 0x%02x 0x%02x", | |
280 | chip_id, chip_major, chip_minor); | |
281 | ||
6d2f5c27 JW |
282 | nvt_efm_disable(nvt); |
283 | ||
284 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
285 | nvt->chip_major = chip_major; | |
286 | nvt->chip_minor = chip_minor; | |
287 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | static void nvt_cir_ldev_init(struct nvt_dev *nvt) | |
293 | { | |
39381d4f JW |
294 | u8 val, psreg, psmask, psval; |
295 | ||
296 | if (nvt->chip_major == CHIP_ID_HIGH_667) { | |
297 | psreg = CR_MULTIFUNC_PIN_SEL; | |
298 | psmask = MULTIFUNC_PIN_SEL_MASK; | |
299 | psval = MULTIFUNC_ENABLE_CIR | MULTIFUNC_ENABLE_CIRWB; | |
300 | } else { | |
301 | psreg = CR_OUTPUT_PIN_SEL; | |
302 | psmask = OUTPUT_PIN_SEL_MASK; | |
303 | psval = OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB; | |
304 | } | |
6d2f5c27 | 305 | |
39381d4f JW |
306 | /* output pin selection: enable CIR, with WB sensor enabled */ |
307 | val = nvt_cr_read(nvt, psreg); | |
308 | val &= psmask; | |
309 | val |= psval; | |
310 | nvt_cr_write(nvt, val, psreg); | |
6d2f5c27 JW |
311 | |
312 | /* Select CIR logical device and enable */ | |
313 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
314 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
315 | ||
316 | nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
317 | nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
318 | ||
319 | nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC); | |
320 | ||
321 | nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d", | |
322 | nvt->cir_addr, nvt->cir_irq); | |
323 | } | |
324 | ||
325 | static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt) | |
326 | { | |
327 | /* Select ACPI logical device, enable it and CIR Wake */ | |
328 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
329 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
330 | ||
331 | /* Enable CIR Wake via PSOUT# (Pin60) */ | |
332 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
333 | ||
334 | /* enable cir interrupt of mouse/keyboard IRQ event */ | |
335 | nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); | |
336 | ||
337 | /* enable pme interrupt of cir wakeup event */ | |
338 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
339 | ||
340 | /* Select CIR Wake logical device and enable */ | |
341 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
342 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
343 | ||
344 | nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
345 | nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
346 | ||
347 | nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC); | |
348 | ||
349 | nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d", | |
350 | nvt->cir_wake_addr, nvt->cir_wake_irq); | |
351 | } | |
352 | ||
353 | /* clear out the hardware's cir rx fifo */ | |
354 | static void nvt_clear_cir_fifo(struct nvt_dev *nvt) | |
355 | { | |
356 | u8 val; | |
357 | ||
358 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
359 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
360 | } | |
361 | ||
362 | /* clear out the hardware's cir wake rx fifo */ | |
363 | static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt) | |
364 | { | |
365 | u8 val; | |
366 | ||
367 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON); | |
368 | nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR, | |
369 | CIR_WAKE_FIFOCON); | |
370 | } | |
371 | ||
372 | /* clear out the hardware's cir tx fifo */ | |
373 | static void nvt_clear_tx_fifo(struct nvt_dev *nvt) | |
374 | { | |
375 | u8 val; | |
376 | ||
377 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
378 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON); | |
379 | } | |
380 | ||
fbdc781c JW |
381 | /* enable RX Trigger Level Reach and Packet End interrupts */ |
382 | static void nvt_set_cir_iren(struct nvt_dev *nvt) | |
383 | { | |
384 | u8 iren; | |
385 | ||
386 | iren = CIR_IREN_RTR | CIR_IREN_PE; | |
387 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
388 | } | |
389 | ||
6d2f5c27 JW |
390 | static void nvt_cir_regs_init(struct nvt_dev *nvt) |
391 | { | |
392 | /* set sample limit count (PE interrupt raised when reached) */ | |
393 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH); | |
394 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL); | |
395 | ||
396 | /* set fifo irq trigger levels */ | |
397 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV | | |
398 | CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON); | |
399 | ||
400 | /* | |
401 | * Enable TX and RX, specify carrier on = low, off = high, and set | |
402 | * sample period (currently 50us) | |
403 | */ | |
4e6e29ad JW |
404 | nvt_cir_reg_write(nvt, |
405 | CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
406 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
407 | CIR_IRCON); | |
6d2f5c27 JW |
408 | |
409 | /* clear hardware rx and tx fifos */ | |
410 | nvt_clear_cir_fifo(nvt); | |
411 | nvt_clear_tx_fifo(nvt); | |
412 | ||
413 | /* clear any and all stray interrupts */ | |
414 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
415 | ||
fbdc781c JW |
416 | /* and finally, enable interrupts */ |
417 | nvt_set_cir_iren(nvt); | |
6d2f5c27 JW |
418 | } |
419 | ||
420 | static void nvt_cir_wake_regs_init(struct nvt_dev *nvt) | |
421 | { | |
3198ed16 JW |
422 | /* set number of bytes needed for wake from s3 (default 65) */ |
423 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES, | |
424 | CIR_WAKE_FIFO_CMP_DEEP); | |
6d2f5c27 JW |
425 | |
426 | /* set tolerance/variance allowed per byte during wake compare */ | |
427 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE, | |
428 | CIR_WAKE_FIFO_CMP_TOL); | |
429 | ||
430 | /* set sample limit count (PE interrupt raised when reached) */ | |
431 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH); | |
432 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL); | |
433 | ||
434 | /* set cir wake fifo rx trigger level (currently 67) */ | |
435 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV, | |
436 | CIR_WAKE_FIFOCON); | |
437 | ||
438 | /* | |
439 | * Enable TX and RX, specific carrier on = low, off = high, and set | |
440 | * sample period (currently 50us) | |
441 | */ | |
442 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
443 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
444 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, | |
445 | CIR_WAKE_IRCON); | |
446 | ||
447 | /* clear cir wake rx fifo */ | |
448 | nvt_clear_cir_wake_fifo(nvt); | |
449 | ||
450 | /* clear any and all stray interrupts */ | |
451 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); | |
452 | } | |
453 | ||
454 | static void nvt_enable_wake(struct nvt_dev *nvt) | |
455 | { | |
456 | nvt_efm_enable(nvt); | |
457 | ||
458 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
459 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
460 | nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); | |
461 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
462 | ||
463 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
464 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
465 | ||
466 | nvt_efm_disable(nvt); | |
467 | ||
468 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
469 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
4e6e29ad JW |
470 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, |
471 | CIR_WAKE_IRCON); | |
6d2f5c27 JW |
472 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); |
473 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
474 | } | |
475 | ||
476 | /* rx carrier detect only works in learning mode, must be called w/nvt_lock */ | |
477 | static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt) | |
478 | { | |
479 | u32 count, carrier, duration = 0; | |
480 | int i; | |
481 | ||
482 | count = nvt_cir_reg_read(nvt, CIR_FCCL) | | |
483 | nvt_cir_reg_read(nvt, CIR_FCCH) << 8; | |
484 | ||
485 | for (i = 0; i < nvt->pkts; i++) { | |
486 | if (nvt->buf[i] & BUF_PULSE_BIT) | |
487 | duration += nvt->buf[i] & BUF_LEN_MASK; | |
488 | } | |
489 | ||
490 | duration *= SAMPLE_PERIOD; | |
491 | ||
492 | if (!count || !duration) { | |
493 | nvt_pr(KERN_NOTICE, "Unable to determine carrier! (c:%u, d:%u)", | |
494 | count, duration); | |
495 | return 0; | |
496 | } | |
497 | ||
b4608fae | 498 | carrier = MS_TO_NS(count) / duration; |
6d2f5c27 JW |
499 | |
500 | if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER)) | |
501 | nvt_dbg("WTF? Carrier frequency out of range!"); | |
502 | ||
503 | nvt_dbg("Carrier frequency: %u (count %u, duration %u)", | |
504 | carrier, count, duration); | |
505 | ||
506 | return carrier; | |
507 | } | |
508 | ||
509 | /* | |
510 | * set carrier frequency | |
511 | * | |
512 | * set carrier on 2 registers: CP & CC | |
513 | * always set CP as 0x81 | |
514 | * set CC by SPEC, CC = 3MHz/carrier - 1 | |
515 | */ | |
d8b4b582 | 516 | static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier) |
6d2f5c27 | 517 | { |
d8b4b582 | 518 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
519 | u16 val; |
520 | ||
521 | nvt_cir_reg_write(nvt, 1, CIR_CP); | |
522 | val = 3000000 / (carrier) - 1; | |
523 | nvt_cir_reg_write(nvt, val & 0xff, CIR_CC); | |
524 | ||
525 | nvt_dbg("cp: 0x%x cc: 0x%x\n", | |
526 | nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC)); | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
531 | /* | |
532 | * nvt_tx_ir | |
533 | * | |
534 | * 1) clean TX fifo first (handled by AP) | |
535 | * 2) copy data from user space | |
536 | * 3) disable RX interrupts, enable TX interrupts: TTR & TFU | |
537 | * 4) send 9 packets to TX FIFO to open TTR | |
538 | * in interrupt_handler: | |
539 | * 5) send all data out | |
540 | * go back to write(): | |
541 | * 6) disable TX interrupts, re-enable RX interupts | |
542 | * | |
543 | * The key problem of this function is user space data may larger than | |
544 | * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to | |
545 | * buf, and keep current copied data buf num in cur_buf_num. But driver's buf | |
546 | * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to | |
547 | * set TXFCONT as 0xff, until buf_count less than 0xff. | |
548 | */ | |
d8b4b582 | 549 | static int nvt_tx_ir(struct rc_dev *dev, int *txbuf, u32 n) |
6d2f5c27 | 550 | { |
d8b4b582 | 551 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
552 | unsigned long flags; |
553 | size_t cur_count; | |
554 | unsigned int i; | |
555 | u8 iren; | |
556 | int ret; | |
557 | ||
558 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
559 | ||
560 | if (n >= TX_BUF_LEN) { | |
561 | nvt->tx.buf_count = cur_count = TX_BUF_LEN; | |
562 | ret = TX_BUF_LEN; | |
563 | } else { | |
564 | nvt->tx.buf_count = cur_count = n; | |
565 | ret = n; | |
566 | } | |
567 | ||
568 | memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count); | |
569 | ||
570 | nvt->tx.cur_buf_num = 0; | |
571 | ||
572 | /* save currently enabled interrupts */ | |
573 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
574 | ||
575 | /* now disable all interrupts, save TFU & TTR */ | |
576 | nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN); | |
577 | ||
578 | nvt->tx.tx_state = ST_TX_REPLY; | |
579 | ||
580 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 | | |
581 | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
582 | ||
583 | /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */ | |
584 | for (i = 0; i < 9; i++) | |
585 | nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO); | |
586 | ||
587 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
588 | ||
589 | wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST); | |
590 | ||
591 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
592 | nvt->tx.tx_state = ST_TX_NONE; | |
593 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
594 | ||
595 | /* restore enabled interrupts to prior state */ | |
596 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
601 | /* dump contents of the last rx buffer we got from the hw rx fifo */ | |
602 | static void nvt_dump_rx_buf(struct nvt_dev *nvt) | |
603 | { | |
604 | int i; | |
605 | ||
4e6e29ad | 606 | printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts); |
6d2f5c27 | 607 | for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++) |
4e6e29ad JW |
608 | printk(KERN_CONT "0x%02x ", nvt->buf[i]); |
609 | printk(KERN_CONT "\n"); | |
6d2f5c27 JW |
610 | } |
611 | ||
612 | /* | |
613 | * Process raw data in rx driver buffer, store it in raw IR event kfifo, | |
614 | * trigger decode when appropriate. | |
615 | * | |
616 | * We get IR data samples one byte at a time. If the msb is set, its a pulse, | |
617 | * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD | |
618 | * (default 50us) intervals for that pulse/space. A discrete signal is | |
619 | * followed by a series of 0x7f packets, then either 0x7<something> or 0x80 | |
620 | * to signal more IR coming (repeats) or end of IR, respectively. We store | |
621 | * sample data in the raw event kfifo until we see 0x7<something> (except f) | |
622 | * or 0x80, at which time, we trigger a decode operation. | |
623 | */ | |
624 | static void nvt_process_rx_ir_data(struct nvt_dev *nvt) | |
625 | { | |
4651918a | 626 | DEFINE_IR_RAW_EVENT(rawir); |
6d2f5c27 JW |
627 | unsigned int count; |
628 | u32 carrier; | |
629 | u8 sample; | |
630 | int i; | |
631 | ||
632 | nvt_dbg_verbose("%s firing", __func__); | |
633 | ||
634 | if (debug) | |
635 | nvt_dump_rx_buf(nvt); | |
636 | ||
637 | if (nvt->carrier_detect_enabled) | |
638 | carrier = nvt_rx_carrier_detect(nvt); | |
639 | ||
640 | count = nvt->pkts; | |
641 | nvt_dbg_verbose("Processing buffer of len %d", count); | |
642 | ||
b7582815 JW |
643 | init_ir_raw_event(&rawir); |
644 | ||
6d2f5c27 JW |
645 | for (i = 0; i < count; i++) { |
646 | nvt->pkts--; | |
647 | sample = nvt->buf[i]; | |
648 | ||
649 | rawir.pulse = ((sample & BUF_PULSE_BIT) != 0); | |
b4608fae JW |
650 | rawir.duration = US_TO_NS((sample & BUF_LEN_MASK) |
651 | * SAMPLE_PERIOD); | |
6d2f5c27 JW |
652 | |
653 | if ((sample & BUF_LEN_MASK) == BUF_LEN_MASK) { | |
654 | if (nvt->rawir.pulse == rawir.pulse) | |
655 | nvt->rawir.duration += rawir.duration; | |
656 | else { | |
657 | nvt->rawir.duration = rawir.duration; | |
658 | nvt->rawir.pulse = rawir.pulse; | |
659 | } | |
660 | continue; | |
661 | } | |
662 | ||
663 | rawir.duration += nvt->rawir.duration; | |
4651918a ML |
664 | |
665 | init_ir_raw_event(&nvt->rawir); | |
6d2f5c27 JW |
666 | nvt->rawir.duration = 0; |
667 | nvt->rawir.pulse = rawir.pulse; | |
668 | ||
669 | if (sample == BUF_PULSE_BIT) | |
670 | rawir.pulse = false; | |
671 | ||
672 | if (rawir.duration) { | |
673 | nvt_dbg("Storing %s with duration %d", | |
674 | rawir.pulse ? "pulse" : "space", | |
675 | rawir.duration); | |
676 | ||
46872d27 | 677 | ir_raw_event_store_with_filter(nvt->rdev, &rawir); |
6d2f5c27 JW |
678 | } |
679 | ||
680 | /* | |
681 | * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE | |
682 | * indicates end of IR signal, but new data incoming. In both | |
683 | * cases, it means we're ready to call ir_raw_event_handle | |
684 | */ | |
b7582815 JW |
685 | if ((sample == BUF_PULSE_BIT) && nvt->pkts) { |
686 | nvt_dbg("Calling ir_raw_event_handle (signal end)\n"); | |
6d2f5c27 | 687 | ir_raw_event_handle(nvt->rdev); |
b7582815 | 688 | } |
6d2f5c27 JW |
689 | } |
690 | ||
b7582815 JW |
691 | nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n"); |
692 | ir_raw_event_handle(nvt->rdev); | |
693 | ||
6d2f5c27 JW |
694 | if (nvt->pkts) { |
695 | nvt_dbg("Odd, pkts should be 0 now... (its %u)", nvt->pkts); | |
696 | nvt->pkts = 0; | |
697 | } | |
698 | ||
699 | nvt_dbg_verbose("%s done", __func__); | |
700 | } | |
701 | ||
fbdc781c JW |
702 | static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt) |
703 | { | |
704 | nvt_pr(KERN_WARNING, "RX FIFO overrun detected, flushing data!"); | |
705 | ||
706 | nvt->pkts = 0; | |
707 | nvt_clear_cir_fifo(nvt); | |
708 | ir_raw_event_reset(nvt->rdev); | |
709 | } | |
710 | ||
6d2f5c27 JW |
711 | /* copy data from hardware rx fifo into driver buffer */ |
712 | static void nvt_get_rx_ir_data(struct nvt_dev *nvt) | |
713 | { | |
714 | unsigned long flags; | |
715 | u8 fifocount, val; | |
716 | unsigned int b_idx; | |
fbdc781c | 717 | bool overrun = false; |
6d2f5c27 JW |
718 | int i; |
719 | ||
720 | /* Get count of how many bytes to read from RX FIFO */ | |
721 | fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT); | |
722 | /* if we get 0xff, probably means the logical dev is disabled */ | |
723 | if (fifocount == 0xff) | |
724 | return; | |
fbdc781c | 725 | /* watch out for a fifo overrun condition */ |
6d2f5c27 | 726 | else if (fifocount > RX_BUF_LEN) { |
fbdc781c JW |
727 | overrun = true; |
728 | fifocount = RX_BUF_LEN; | |
6d2f5c27 JW |
729 | } |
730 | ||
731 | nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount); | |
732 | ||
733 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
734 | ||
735 | b_idx = nvt->pkts; | |
736 | ||
737 | /* This should never happen, but lets check anyway... */ | |
738 | if (b_idx + fifocount > RX_BUF_LEN) { | |
739 | nvt_process_rx_ir_data(nvt); | |
740 | b_idx = 0; | |
741 | } | |
742 | ||
743 | /* Read fifocount bytes from CIR Sample RX FIFO register */ | |
744 | for (i = 0; i < fifocount; i++) { | |
745 | val = nvt_cir_reg_read(nvt, CIR_SRXFIFO); | |
746 | nvt->buf[b_idx + i] = val; | |
747 | } | |
748 | ||
749 | nvt->pkts += fifocount; | |
750 | nvt_dbg("%s: pkts now %d", __func__, nvt->pkts); | |
751 | ||
752 | nvt_process_rx_ir_data(nvt); | |
753 | ||
fbdc781c JW |
754 | if (overrun) |
755 | nvt_handle_rx_fifo_overrun(nvt); | |
756 | ||
6d2f5c27 JW |
757 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); |
758 | } | |
759 | ||
760 | static void nvt_cir_log_irqs(u8 status, u8 iren) | |
761 | { | |
762 | nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s", | |
763 | status, iren, | |
764 | status & CIR_IRSTS_RDR ? " RDR" : "", | |
765 | status & CIR_IRSTS_RTR ? " RTR" : "", | |
766 | status & CIR_IRSTS_PE ? " PE" : "", | |
767 | status & CIR_IRSTS_RFO ? " RFO" : "", | |
768 | status & CIR_IRSTS_TE ? " TE" : "", | |
769 | status & CIR_IRSTS_TTR ? " TTR" : "", | |
770 | status & CIR_IRSTS_TFU ? " TFU" : "", | |
771 | status & CIR_IRSTS_GH ? " GH" : "", | |
772 | status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE | | |
773 | CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR | | |
774 | CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : ""); | |
775 | } | |
776 | ||
777 | static bool nvt_cir_tx_inactive(struct nvt_dev *nvt) | |
778 | { | |
779 | unsigned long flags; | |
780 | bool tx_inactive; | |
781 | u8 tx_state; | |
782 | ||
783 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
784 | tx_state = nvt->tx.tx_state; | |
785 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
786 | ||
787 | tx_inactive = (tx_state == ST_TX_NONE); | |
788 | ||
789 | return tx_inactive; | |
790 | } | |
791 | ||
792 | /* interrupt service routine for incoming and outgoing CIR data */ | |
793 | static irqreturn_t nvt_cir_isr(int irq, void *data) | |
794 | { | |
795 | struct nvt_dev *nvt = data; | |
796 | u8 status, iren, cur_state; | |
797 | unsigned long flags; | |
798 | ||
799 | nvt_dbg_verbose("%s firing", __func__); | |
800 | ||
801 | nvt_efm_enable(nvt); | |
802 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
803 | nvt_efm_disable(nvt); | |
804 | ||
805 | /* | |
806 | * Get IR Status register contents. Write 1 to ack/clear | |
807 | * | |
808 | * bit: reg name - description | |
809 | * 7: CIR_IRSTS_RDR - RX Data Ready | |
810 | * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach | |
811 | * 5: CIR_IRSTS_PE - Packet End | |
812 | * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set) | |
813 | * 3: CIR_IRSTS_TE - TX FIFO Empty | |
814 | * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach | |
815 | * 1: CIR_IRSTS_TFU - TX FIFO Underrun | |
816 | * 0: CIR_IRSTS_GH - Min Length Detected | |
817 | */ | |
818 | status = nvt_cir_reg_read(nvt, CIR_IRSTS); | |
819 | if (!status) { | |
820 | nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__); | |
821 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
822 | return IRQ_RETVAL(IRQ_NONE); | |
823 | } | |
824 | ||
825 | /* ack/clear all irq flags we've got */ | |
826 | nvt_cir_reg_write(nvt, status, CIR_IRSTS); | |
827 | nvt_cir_reg_write(nvt, 0, CIR_IRSTS); | |
828 | ||
829 | /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */ | |
830 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
831 | if (!iren) { | |
832 | nvt_dbg_verbose("%s exiting, CIR not enabled", __func__); | |
833 | return IRQ_RETVAL(IRQ_NONE); | |
834 | } | |
835 | ||
836 | if (debug) | |
837 | nvt_cir_log_irqs(status, iren); | |
838 | ||
839 | if (status & CIR_IRSTS_RTR) { | |
840 | /* FIXME: add code for study/learn mode */ | |
841 | /* We only do rx if not tx'ing */ | |
842 | if (nvt_cir_tx_inactive(nvt)) | |
843 | nvt_get_rx_ir_data(nvt); | |
844 | } | |
845 | ||
846 | if (status & CIR_IRSTS_PE) { | |
847 | if (nvt_cir_tx_inactive(nvt)) | |
848 | nvt_get_rx_ir_data(nvt); | |
849 | ||
850 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
851 | ||
852 | cur_state = nvt->study_state; | |
853 | ||
854 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
855 | ||
856 | if (cur_state == ST_STUDY_NONE) | |
857 | nvt_clear_cir_fifo(nvt); | |
858 | } | |
859 | ||
860 | if (status & CIR_IRSTS_TE) | |
861 | nvt_clear_tx_fifo(nvt); | |
862 | ||
863 | if (status & CIR_IRSTS_TTR) { | |
864 | unsigned int pos, count; | |
865 | u8 tmp; | |
866 | ||
867 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
868 | ||
869 | pos = nvt->tx.cur_buf_num; | |
870 | count = nvt->tx.buf_count; | |
871 | ||
872 | /* Write data into the hardware tx fifo while pos < count */ | |
873 | if (pos < count) { | |
874 | nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO); | |
875 | nvt->tx.cur_buf_num++; | |
876 | /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */ | |
877 | } else { | |
878 | tmp = nvt_cir_reg_read(nvt, CIR_IREN); | |
879 | nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN); | |
880 | } | |
881 | ||
882 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
883 | ||
884 | } | |
885 | ||
886 | if (status & CIR_IRSTS_TFU) { | |
887 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
888 | if (nvt->tx.tx_state == ST_TX_REPLY) { | |
889 | nvt->tx.tx_state = ST_TX_REQUEST; | |
890 | wake_up(&nvt->tx.queue); | |
891 | } | |
892 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
893 | } | |
894 | ||
895 | nvt_dbg_verbose("%s done", __func__); | |
896 | return IRQ_RETVAL(IRQ_HANDLED); | |
897 | } | |
898 | ||
899 | /* Interrupt service routine for CIR Wake */ | |
900 | static irqreturn_t nvt_cir_wake_isr(int irq, void *data) | |
901 | { | |
902 | u8 status, iren, val; | |
903 | struct nvt_dev *nvt = data; | |
904 | unsigned long flags; | |
905 | ||
906 | nvt_dbg_wake("%s firing", __func__); | |
907 | ||
908 | status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS); | |
909 | if (!status) | |
910 | return IRQ_RETVAL(IRQ_NONE); | |
911 | ||
912 | if (status & CIR_WAKE_IRSTS_IR_PENDING) | |
913 | nvt_clear_cir_wake_fifo(nvt); | |
914 | ||
915 | nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS); | |
916 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS); | |
917 | ||
918 | /* Interrupt may be shared with CIR, bail if Wake not enabled */ | |
919 | iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN); | |
920 | if (!iren) { | |
921 | nvt_dbg_wake("%s exiting, wake not enabled", __func__); | |
922 | return IRQ_RETVAL(IRQ_HANDLED); | |
923 | } | |
924 | ||
925 | if ((status & CIR_WAKE_IRSTS_PE) && | |
926 | (nvt->wake_state == ST_WAKE_START)) { | |
927 | while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) { | |
928 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY); | |
929 | nvt_dbg("setting wake up key: 0x%x", val); | |
930 | } | |
931 | ||
932 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
933 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
934 | nvt->wake_state = ST_WAKE_FINISH; | |
935 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
936 | } | |
937 | ||
938 | nvt_dbg_wake("%s done", __func__); | |
939 | return IRQ_RETVAL(IRQ_HANDLED); | |
940 | } | |
941 | ||
942 | static void nvt_enable_cir(struct nvt_dev *nvt) | |
943 | { | |
944 | /* set function enable flags */ | |
945 | nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
946 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
947 | CIR_IRCON); | |
948 | ||
949 | nvt_efm_enable(nvt); | |
950 | ||
951 | /* enable the CIR logical device */ | |
952 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
953 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
954 | ||
955 | nvt_efm_disable(nvt); | |
956 | ||
957 | /* clear all pending interrupts */ | |
958 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
959 | ||
960 | /* enable interrupts */ | |
fbdc781c | 961 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
962 | } |
963 | ||
964 | static void nvt_disable_cir(struct nvt_dev *nvt) | |
965 | { | |
966 | /* disable CIR interrupts */ | |
967 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
968 | ||
969 | /* clear any and all pending interrupts */ | |
970 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
971 | ||
972 | /* clear all function enable flags */ | |
973 | nvt_cir_reg_write(nvt, 0, CIR_IRCON); | |
974 | ||
975 | /* clear hardware rx and tx fifos */ | |
976 | nvt_clear_cir_fifo(nvt); | |
977 | nvt_clear_tx_fifo(nvt); | |
978 | ||
979 | nvt_efm_enable(nvt); | |
980 | ||
981 | /* disable the CIR logical device */ | |
982 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
983 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
984 | ||
985 | nvt_efm_disable(nvt); | |
986 | } | |
987 | ||
d8b4b582 | 988 | static int nvt_open(struct rc_dev *dev) |
6d2f5c27 | 989 | { |
d8b4b582 | 990 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
991 | unsigned long flags; |
992 | ||
993 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
994 | nvt->in_use = true; | |
995 | nvt_enable_cir(nvt); | |
996 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
997 | ||
998 | return 0; | |
999 | } | |
1000 | ||
d8b4b582 | 1001 | static void nvt_close(struct rc_dev *dev) |
6d2f5c27 | 1002 | { |
d8b4b582 | 1003 | struct nvt_dev *nvt = dev->priv; |
6d2f5c27 JW |
1004 | unsigned long flags; |
1005 | ||
1006 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1007 | nvt->in_use = false; | |
1008 | nvt_disable_cir(nvt); | |
1009 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1010 | } | |
1011 | ||
1012 | /* Allocate memory, probe hardware, and initialize everything */ | |
1013 | static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) | |
1014 | { | |
d8b4b582 DH |
1015 | struct nvt_dev *nvt; |
1016 | struct rc_dev *rdev; | |
6d2f5c27 JW |
1017 | int ret = -ENOMEM; |
1018 | ||
1019 | nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL); | |
1020 | if (!nvt) | |
1021 | return ret; | |
1022 | ||
6d2f5c27 | 1023 | /* input device for IR remote (and tx) */ |
d8b4b582 | 1024 | rdev = rc_allocate_device(); |
6d2f5c27 JW |
1025 | if (!rdev) |
1026 | goto failure; | |
1027 | ||
1028 | ret = -ENODEV; | |
1029 | /* validate pnp resources */ | |
1030 | if (!pnp_port_valid(pdev, 0) || | |
1031 | pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) { | |
1032 | dev_err(&pdev->dev, "IR PNP Port not valid!\n"); | |
1033 | goto failure; | |
1034 | } | |
1035 | ||
1036 | if (!pnp_irq_valid(pdev, 0)) { | |
1037 | dev_err(&pdev->dev, "PNP IRQ not valid!\n"); | |
1038 | goto failure; | |
1039 | } | |
1040 | ||
1041 | if (!pnp_port_valid(pdev, 1) || | |
1042 | pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) { | |
1043 | dev_err(&pdev->dev, "Wake PNP Port not valid!\n"); | |
1044 | goto failure; | |
1045 | } | |
1046 | ||
1047 | nvt->cir_addr = pnp_port_start(pdev, 0); | |
1048 | nvt->cir_irq = pnp_irq(pdev, 0); | |
1049 | ||
1050 | nvt->cir_wake_addr = pnp_port_start(pdev, 1); | |
1051 | /* irq is always shared between cir and cir wake */ | |
1052 | nvt->cir_wake_irq = nvt->cir_irq; | |
1053 | ||
1054 | nvt->cr_efir = CR_EFIR; | |
1055 | nvt->cr_efdr = CR_EFDR; | |
1056 | ||
1057 | spin_lock_init(&nvt->nvt_lock); | |
1058 | spin_lock_init(&nvt->tx.lock); | |
4651918a | 1059 | init_ir_raw_event(&nvt->rawir); |
6d2f5c27 JW |
1060 | |
1061 | ret = -EBUSY; | |
1062 | /* now claim resources */ | |
1063 | if (!request_region(nvt->cir_addr, | |
1064 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
1065 | goto failure; | |
1066 | ||
1067 | if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED, | |
1068 | NVT_DRIVER_NAME, (void *)nvt)) | |
1069 | goto failure; | |
1070 | ||
1071 | if (!request_region(nvt->cir_wake_addr, | |
1072 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
1073 | goto failure; | |
1074 | ||
1075 | if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED, | |
1076 | NVT_DRIVER_NAME, (void *)nvt)) | |
1077 | goto failure; | |
1078 | ||
1079 | pnp_set_drvdata(pdev, nvt); | |
1080 | nvt->pdev = pdev; | |
1081 | ||
1082 | init_waitqueue_head(&nvt->tx.queue); | |
1083 | ||
1084 | ret = nvt_hw_detect(nvt); | |
1085 | if (ret) | |
1086 | goto failure; | |
1087 | ||
1088 | /* Initialize CIR & CIR Wake Logical Devices */ | |
1089 | nvt_efm_enable(nvt); | |
1090 | nvt_cir_ldev_init(nvt); | |
1091 | nvt_cir_wake_ldev_init(nvt); | |
1092 | nvt_efm_disable(nvt); | |
1093 | ||
1094 | /* Initialize CIR & CIR Wake Config Registers */ | |
1095 | nvt_cir_regs_init(nvt); | |
1096 | nvt_cir_wake_regs_init(nvt); | |
1097 | ||
d8b4b582 DH |
1098 | /* Set up the rc device */ |
1099 | rdev->priv = nvt; | |
1100 | rdev->driver_type = RC_DRIVER_IR_RAW; | |
52b66144 | 1101 | rdev->allowed_protos = RC_TYPE_ALL; |
d8b4b582 DH |
1102 | rdev->open = nvt_open; |
1103 | rdev->close = nvt_close; | |
1104 | rdev->tx_ir = nvt_tx_ir; | |
1105 | rdev->s_tx_carrier = nvt_set_tx_carrier; | |
1106 | rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver"; | |
46872d27 | 1107 | rdev->input_phys = "nuvoton/cir0"; |
d8b4b582 DH |
1108 | rdev->input_id.bustype = BUS_HOST; |
1109 | rdev->input_id.vendor = PCI_VENDOR_ID_WINBOND2; | |
1110 | rdev->input_id.product = nvt->chip_major; | |
1111 | rdev->input_id.version = nvt->chip_minor; | |
46872d27 | 1112 | rdev->dev.parent = &pdev->dev; |
d8b4b582 DH |
1113 | rdev->driver_name = NVT_DRIVER_NAME; |
1114 | rdev->map_name = RC_MAP_RC6_MCE; | |
46872d27 JW |
1115 | rdev->timeout = US_TO_NS(1000); |
1116 | /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */ | |
1117 | rdev->rx_resolution = US_TO_NS(CIR_SAMPLE_PERIOD); | |
6d2f5c27 | 1118 | #if 0 |
d8b4b582 DH |
1119 | rdev->min_timeout = XYZ; |
1120 | rdev->max_timeout = XYZ; | |
6d2f5c27 | 1121 | /* tx bits */ |
d8b4b582 | 1122 | rdev->tx_resolution = XYZ; |
6d2f5c27 | 1123 | #endif |
6d2f5c27 | 1124 | |
d8b4b582 | 1125 | ret = rc_register_device(rdev); |
6d2f5c27 JW |
1126 | if (ret) |
1127 | goto failure; | |
1128 | ||
46872d27 | 1129 | device_init_wakeup(&pdev->dev, true); |
d8b4b582 | 1130 | nvt->rdev = rdev; |
6d2f5c27 JW |
1131 | nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n"); |
1132 | if (debug) { | |
1133 | cir_dump_regs(nvt); | |
1134 | cir_wake_dump_regs(nvt); | |
1135 | } | |
1136 | ||
1137 | return 0; | |
1138 | ||
1139 | failure: | |
1140 | if (nvt->cir_irq) | |
1141 | free_irq(nvt->cir_irq, nvt); | |
1142 | if (nvt->cir_addr) | |
1143 | release_region(nvt->cir_addr, CIR_IOREG_LENGTH); | |
1144 | ||
1145 | if (nvt->cir_wake_irq) | |
1146 | free_irq(nvt->cir_wake_irq, nvt); | |
1147 | if (nvt->cir_wake_addr) | |
1148 | release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH); | |
1149 | ||
d8b4b582 | 1150 | rc_free_device(rdev); |
6d2f5c27 JW |
1151 | kfree(nvt); |
1152 | ||
1153 | return ret; | |
1154 | } | |
1155 | ||
1156 | static void __devexit nvt_remove(struct pnp_dev *pdev) | |
1157 | { | |
1158 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1159 | unsigned long flags; | |
1160 | ||
1161 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1162 | /* disable CIR */ | |
1163 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1164 | nvt_disable_cir(nvt); | |
1165 | /* enable CIR Wake (for IR power-on) */ | |
1166 | nvt_enable_wake(nvt); | |
1167 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1168 | ||
1169 | /* free resources */ | |
1170 | free_irq(nvt->cir_irq, nvt); | |
1171 | free_irq(nvt->cir_wake_irq, nvt); | |
1172 | release_region(nvt->cir_addr, CIR_IOREG_LENGTH); | |
1173 | release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH); | |
1174 | ||
d8b4b582 | 1175 | rc_unregister_device(nvt->rdev); |
6d2f5c27 | 1176 | |
6d2f5c27 JW |
1177 | kfree(nvt); |
1178 | } | |
1179 | ||
1180 | static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state) | |
1181 | { | |
1182 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1183 | unsigned long flags; | |
1184 | ||
1185 | nvt_dbg("%s called", __func__); | |
1186 | ||
1187 | /* zero out misc state tracking */ | |
1188 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1189 | nvt->study_state = ST_STUDY_NONE; | |
1190 | nvt->wake_state = ST_WAKE_NONE; | |
1191 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1192 | ||
1193 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
1194 | nvt->tx.tx_state = ST_TX_NONE; | |
1195 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
1196 | ||
1197 | /* disable all CIR interrupts */ | |
1198 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1199 | ||
1200 | nvt_efm_enable(nvt); | |
1201 | ||
1202 | /* disable cir logical dev */ | |
1203 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
1204 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
1205 | ||
1206 | nvt_efm_disable(nvt); | |
1207 | ||
1208 | /* make sure wake is enabled */ | |
1209 | nvt_enable_wake(nvt); | |
1210 | ||
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static int nvt_resume(struct pnp_dev *pdev) | |
1215 | { | |
1216 | int ret = 0; | |
1217 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1218 | ||
1219 | nvt_dbg("%s called", __func__); | |
1220 | ||
1221 | /* open interrupt */ | |
fbdc781c | 1222 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
1223 | |
1224 | /* Enable CIR logical device */ | |
1225 | nvt_efm_enable(nvt); | |
1226 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
1227 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
1228 | ||
1229 | nvt_efm_disable(nvt); | |
1230 | ||
1231 | nvt_cir_regs_init(nvt); | |
1232 | nvt_cir_wake_regs_init(nvt); | |
1233 | ||
1234 | return ret; | |
1235 | } | |
1236 | ||
1237 | static void nvt_shutdown(struct pnp_dev *pdev) | |
1238 | { | |
1239 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1240 | nvt_enable_wake(nvt); | |
1241 | } | |
1242 | ||
1243 | static const struct pnp_device_id nvt_ids[] = { | |
1244 | { "WEC0530", 0 }, /* CIR */ | |
1245 | { "NTN0530", 0 }, /* CIR for new chip's pnp id*/ | |
1246 | { "", 0 }, | |
1247 | }; | |
1248 | ||
1249 | static struct pnp_driver nvt_driver = { | |
1250 | .name = NVT_DRIVER_NAME, | |
1251 | .id_table = nvt_ids, | |
1252 | .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, | |
1253 | .probe = nvt_probe, | |
1254 | .remove = __devexit_p(nvt_remove), | |
1255 | .suspend = nvt_suspend, | |
1256 | .resume = nvt_resume, | |
1257 | .shutdown = nvt_shutdown, | |
1258 | }; | |
1259 | ||
1260 | int nvt_init(void) | |
1261 | { | |
1262 | return pnp_register_driver(&nvt_driver); | |
1263 | } | |
1264 | ||
1265 | void nvt_exit(void) | |
1266 | { | |
1267 | pnp_unregister_driver(&nvt_driver); | |
1268 | } | |
1269 | ||
1270 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
1271 | MODULE_PARM_DESC(debug, "Enable debugging output"); | |
1272 | ||
1273 | MODULE_DEVICE_TABLE(pnp, nvt_ids); | |
1274 | MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver"); | |
1275 | ||
1276 | MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>"); | |
1277 | MODULE_LICENSE("GPL"); | |
1278 | ||
1279 | module_init(nvt_init); | |
1280 | module_exit(nvt_exit); |