2 * twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices
4 * Copyright (C) 2005-2006 Texas Instruments, Inc.
6 * Modifications to defer interrupt handling to a kernel thread:
7 * Copyright (C) 2006 MontaVista Software, Inc.
9 * Based on tlv320aic23.c:
10 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
12 * Code cleanup and modifications to IRQ handler.
13 * by syed khasim <x0khasim@ti.com>
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include <linux/kernel_stat.h>
31 #include <linux/init.h>
32 #include <linux/mutex.h>
33 #include <linux/interrupt.h>
34 #include <linux/irq.h>
35 #include <linux/random.h>
36 #include <linux/kthread.h>
37 #include <linux/platform_device.h>
38 #include <linux/clk.h>
40 #include <linux/i2c.h>
41 #include <linux/i2c/twl4030.h>
42 #include <linux/i2c/twl4030-gpio.h>
43 #include <linux/i2c/twl4030-madc.h>
44 #include <linux/i2c/twl4030-pwrirq.h>
46 #define DRIVER_NAME "twl4030"
48 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
49 #define twl_has_rtc() true
51 #define twl_has_rtc() false
54 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
55 #define twl_has_keypad() true
57 #define twl_has_keypad() false
60 /* Primary Interrupt Handler on TWL4030 Registers */
62 /* Register Definitions */
64 #define REG_PIH_ISR_P1 (0x1)
65 #define REG_PIH_ISR_P2 (0x2)
66 #define REG_PIH_SIR (0x3)
68 /* Triton Core internal information (BEGIN) */
70 /* Last - for index max*/
71 #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG
73 #define TWL4030_NUM_SLAVES 4
76 #define TWL4030_SLAVENUM_NUM0 0x00
77 #define TWL4030_SLAVENUM_NUM1 0x01
78 #define TWL4030_SLAVENUM_NUM2 0x02
79 #define TWL4030_SLAVENUM_NUM3 0x03
81 /* Base Address defns */
83 #define TWL4030_BASEADD_USB 0x0000
85 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000
86 #define TWL4030_BASEADD_GPIO 0x0098
88 #define TWL4030_BASEADD_INTBR 0x0085
89 #define TWL4030_BASEADD_PIH 0x0080
90 #define TWL4030_BASEADD_TEST 0x004C
92 #define TWL4030_BASEADD_INTERRUPTS 0x00B9
93 #define TWL4030_BASEADD_LED 0x00EE
94 #define TWL4030_BASEADD_MADC 0x0000
95 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074
96 #define TWL4030_BASEADD_PRECHARGE 0x00AA
97 #define TWL4030_BASEADD_PWM0 0x00F8
98 #define TWL4030_BASEADD_PWM1 0x00FB
99 #define TWL4030_BASEADD_PWMA 0x00EF
100 #define TWL4030_BASEADD_PWMB 0x00F1
101 #define TWL4030_BASEADD_KEYPAD 0x00D2
103 #define TWL4030_BASEADD_BACKUP 0x0014
104 #define TWL4030_BASEADD_INT 0x002E
105 #define TWL4030_BASEADD_PM_MASTER 0x0036
106 #define TWL4030_BASEADD_PM_RECEIVER 0x005B
107 #define TWL4030_BASEADD_RTC 0x001C
108 #define TWL4030_BASEADD_SECURED_REG 0x0000
110 /* TWL4030 BCI registers */
111 #define TWL4030_INTERRUPTS_BCIIMR1A 0x2
112 #define TWL4030_INTERRUPTS_BCIIMR2A 0x3
113 #define TWL4030_INTERRUPTS_BCIIMR1B 0x6
114 #define TWL4030_INTERRUPTS_BCIIMR2B 0x7
115 #define TWL4030_INTERRUPTS_BCIISR1A 0x0
116 #define TWL4030_INTERRUPTS_BCIISR2A 0x1
117 #define TWL4030_INTERRUPTS_BCIISR1B 0x4
118 #define TWL4030_INTERRUPTS_BCIISR2B 0x5
120 /* TWL4030 keypad registers */
121 #define TWL4030_KEYPAD_KEYP_IMR1 0x12
122 #define TWL4030_KEYPAD_KEYP_IMR2 0x14
123 #define TWL4030_KEYPAD_KEYP_ISR1 0x11
124 #define TWL4030_KEYPAD_KEYP_ISR2 0x13
127 /* Triton Core internal information (END) */
129 /* Few power values */
130 #define R_CFG_BOOT 0x05
131 #define R_PROTECT_KEY 0x0E
134 #define KEY_UNLOCK1 0xce
135 #define KEY_UNLOCK2 0xec
136 #define KEY_LOCK 0x00
138 #define HFCLK_FREQ_19p2_MHZ (1 << 0)
139 #define HFCLK_FREQ_26_MHZ (2 << 0)
140 #define HFCLK_FREQ_38p4_MHZ (3 << 0)
141 #define HIGH_PERF_SQ (1 << 3)
143 /* SIH_CTRL registers that aren't defined elsewhere */
144 #define TWL4030_INTERRUPTS_BCISIHCTRL 0x0d
145 #define TWL4030_MADC_MADC_SIH_CTRL 0x67
146 #define TWL4030_KEYPAD_KEYP_SIH_CTRL 0x17
148 #define TWL4030_SIH_CTRL_COR_MASK (1 << 2)
151 * struct twl4030_mod_iregs - TWL module IMR/ISR regs to mask/clear at init
152 * @mod_no: TWL4030 module number (e.g., TWL4030_MODULE_GPIO)
153 * @sih_ctrl: address of module SIH_CTRL register
154 * @reg_cnt: number of IMR/ISR regs
155 * @imrs: pointer to array of TWL module interrupt mask register indices
156 * @isrs: pointer to array of TWL module interrupt status register indices
158 * Ties together TWL4030 modules and lists of IMR/ISR registers to mask/clear
159 * during twl_init_irq().
161 struct twl4030_mod_iregs {
169 /* TWL4030 INT module interrupt mask registers */
170 static const u8 __initconst twl4030_int_imr_regs[] = {
171 TWL4030_INT_PWR_IMR1,
172 TWL4030_INT_PWR_IMR2,
175 /* TWL4030 INT module interrupt status registers */
176 static const u8 __initconst twl4030_int_isr_regs[] = {
177 TWL4030_INT_PWR_ISR1,
178 TWL4030_INT_PWR_ISR2,
181 /* TWL4030 INTERRUPTS module interrupt mask registers */
182 static const u8 __initconst twl4030_interrupts_imr_regs[] = {
183 TWL4030_INTERRUPTS_BCIIMR1A,
184 TWL4030_INTERRUPTS_BCIIMR1B,
185 TWL4030_INTERRUPTS_BCIIMR2A,
186 TWL4030_INTERRUPTS_BCIIMR2B,
189 /* TWL4030 INTERRUPTS module interrupt status registers */
190 static const u8 __initconst twl4030_interrupts_isr_regs[] = {
191 TWL4030_INTERRUPTS_BCIISR1A,
192 TWL4030_INTERRUPTS_BCIISR1B,
193 TWL4030_INTERRUPTS_BCIISR2A,
194 TWL4030_INTERRUPTS_BCIISR2B,
197 /* TWL4030 MADC module interrupt mask registers */
198 static const u8 __initconst twl4030_madc_imr_regs[] = {
203 /* TWL4030 MADC module interrupt status registers */
204 static const u8 __initconst twl4030_madc_isr_regs[] = {
209 /* TWL4030 keypad module interrupt mask registers */
210 static const u8 __initconst twl4030_keypad_imr_regs[] = {
211 TWL4030_KEYPAD_KEYP_IMR1,
212 TWL4030_KEYPAD_KEYP_IMR2,
215 /* TWL4030 keypad module interrupt status registers */
216 static const u8 __initconst twl4030_keypad_isr_regs[] = {
217 TWL4030_KEYPAD_KEYP_ISR1,
218 TWL4030_KEYPAD_KEYP_ISR2,
221 /* TWL4030 GPIO module interrupt mask registers */
222 static const u8 __initconst twl4030_gpio_imr_regs[] = {
231 /* TWL4030 GPIO module interrupt status registers */
232 static const u8 __initconst twl4030_gpio_isr_regs[] = {
241 /* TWL4030 modules that have IMR/ISR registers that must be masked/cleared */
242 static const struct twl4030_mod_iregs __initconst twl4030_mod_regs[] = {
244 .mod_no = TWL4030_MODULE_INT,
245 .sih_ctrl = TWL4030_INT_PWR_SIH_CTRL,
246 .reg_cnt = ARRAY_SIZE(twl4030_int_imr_regs),
247 .imrs = twl4030_int_imr_regs,
248 .isrs = twl4030_int_isr_regs,
251 .mod_no = TWL4030_MODULE_INTERRUPTS,
252 .sih_ctrl = TWL4030_INTERRUPTS_BCISIHCTRL,
253 .reg_cnt = ARRAY_SIZE(twl4030_interrupts_imr_regs),
254 .imrs = twl4030_interrupts_imr_regs,
255 .isrs = twl4030_interrupts_isr_regs,
258 .mod_no = TWL4030_MODULE_MADC,
259 .sih_ctrl = TWL4030_MADC_MADC_SIH_CTRL,
260 .reg_cnt = ARRAY_SIZE(twl4030_madc_imr_regs),
261 .imrs = twl4030_madc_imr_regs,
262 .isrs = twl4030_madc_isr_regs,
265 .mod_no = TWL4030_MODULE_KEYPAD,
266 .sih_ctrl = TWL4030_KEYPAD_KEYP_SIH_CTRL,
267 .reg_cnt = ARRAY_SIZE(twl4030_keypad_imr_regs),
268 .imrs = twl4030_keypad_imr_regs,
269 .isrs = twl4030_keypad_isr_regs,
272 .mod_no = TWL4030_MODULE_GPIO,
273 .sih_ctrl = REG_GPIO_SIH_CTRL,
274 .reg_cnt = ARRAY_SIZE(twl4030_gpio_imr_regs),
275 .imrs = twl4030_gpio_imr_regs,
276 .isrs = twl4030_gpio_isr_regs,
281 /* Data Structures */
282 /* To have info on T2 IRQ substem activated or not */
283 static struct completion irq_event;
285 /* Structure to define on TWL4030 Slave ID */
286 struct twl4030_client {
287 struct i2c_client *client;
291 /* max numb of i2c_msg required is for read =2 */
292 struct i2c_msg xfer_msg[2];
294 /* To lock access to xfer_msg */
295 struct mutex xfer_lock;
299 struct twl4030mapping {
300 unsigned char sid; /* Slave ID */
301 unsigned char base; /* base address */
304 /* mapping the module id to slave id and base address */
305 static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
306 { TWL4030_SLAVENUM_NUM0, TWL4030_BASEADD_USB },
307 { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_AUDIO_VOICE },
308 { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_GPIO },
309 { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_INTBR },
310 { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_PIH },
311 { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_TEST },
312 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_KEYPAD },
313 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MADC },
314 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_INTERRUPTS },
315 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_LED },
316 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MAIN_CHARGE },
317 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PRECHARGE },
318 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM0 },
319 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM1 },
320 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMA },
321 { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMB },
322 { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_BACKUP },
323 { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_INT },
324 { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_MASTER },
325 { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_RECEIVER },
326 { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_RTC },
327 { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_SECURED_REG },
330 static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
333 * TWL4030 doesn't have PIH mask, hence dummy function for mask
337 static void twl4030_i2c_ackirq(unsigned int irq)
341 static void twl4030_i2c_disableint(unsigned int irq)
345 static void twl4030_i2c_enableint(unsigned int irq)
349 /* information for processing in the Work Item */
350 static struct irq_chip twl4030_irq_chip = {
352 .ack = twl4030_i2c_ackirq,
353 .mask = twl4030_i2c_disableint,
354 .unmask = twl4030_i2c_enableint,
357 /* Global Functions */
360 * twl4030_i2c_write - Writes a n bit register in TWL4030
361 * @mod_no: module number
362 * @value: an array of num_bytes+1 containing data to write
363 * @reg: register address (just offset will do)
364 * @num_bytes: number of bytes to transfer
366 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
367 * valid data starts at Offset 1.
369 * Returns the result of operation - 0 is success
371 int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
375 struct twl4030_client *twl;
378 if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
379 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
382 sid = twl4030_map[mod_no].sid;
383 twl = &twl4030_modules[sid];
385 if (unlikely(!twl->inuse)) {
386 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
389 mutex_lock(&twl->xfer_lock);
391 * [MSG1]: fill the register address data
392 * fill the data Tx buffer
394 msg = &twl->xfer_msg[0];
395 msg->addr = twl->address;
396 msg->len = num_bytes + 1;
399 /* over write the first byte of buffer with the register address */
400 *value = twl4030_map[mod_no].base + reg;
401 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
402 mutex_unlock(&twl->xfer_lock);
404 /* i2cTransfer returns num messages.translate it pls.. */
409 EXPORT_SYMBOL(twl4030_i2c_write);
412 * twl4030_i2c_read - Reads a n bit register in TWL4030
413 * @mod_no: module number
414 * @value: an array of num_bytes containing data to be read
415 * @reg: register address (just offset will do)
416 * @num_bytes: number of bytes to transfer
418 * Returns result of operation - num_bytes is success else failure.
420 int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, u8 num_bytes)
425 struct twl4030_client *twl;
428 if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
429 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
432 sid = twl4030_map[mod_no].sid;
433 twl = &twl4030_modules[sid];
435 if (unlikely(!twl->inuse)) {
436 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
439 mutex_lock(&twl->xfer_lock);
440 /* [MSG1] fill the register address data */
441 msg = &twl->xfer_msg[0];
442 msg->addr = twl->address;
444 msg->flags = 0; /* Read the register value */
445 val = twl4030_map[mod_no].base + reg;
447 /* [MSG2] fill the data rx buffer */
448 msg = &twl->xfer_msg[1];
449 msg->addr = twl->address;
450 msg->flags = I2C_M_RD; /* Read the register value */
451 msg->len = num_bytes; /* only n bytes */
453 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
454 mutex_unlock(&twl->xfer_lock);
456 /* i2cTransfer returns num messages.translate it pls.. */
461 EXPORT_SYMBOL(twl4030_i2c_read);
464 * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
465 * @mod_no: module number
466 * @value: the value to be written 8 bit
467 * @reg: register address (just offset will do)
469 * Returns result of operation - 0 is success
471 int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
474 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
475 u8 temp_buffer[2] = { 0 };
476 /* offset 1 contains the data */
477 temp_buffer[1] = value;
478 return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
480 EXPORT_SYMBOL(twl4030_i2c_write_u8);
483 * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
484 * @mod_no: module number
485 * @value: the value read 8 bit
486 * @reg: register address (just offset will do)
488 * Returns result of operation - 0 is success
490 int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
492 return twl4030_i2c_read(mod_no, value, reg, 1);
494 EXPORT_SYMBOL(twl4030_i2c_read_u8);
496 /* Helper Functions */
499 * do_twl4030_module_irq() is the desc->handle method for each of the twl4030
500 * module interrupts. It executes in kernel thread context.
501 * On entry, cpu interrupts are disabled.
503 static void do_twl4030_module_irq(unsigned int irq, irq_desc_t *desc)
505 struct irqaction *action;
506 const unsigned int cpu = smp_processor_id();
509 * Earlier this was desc->triggered = 1;
511 desc->status |= IRQ_LEVEL;
514 * The desc->handle method would normally call the desc->chip->ack
515 * method here, but we won't bother since our ack method is NULL.
519 kstat_cpu(cpu).irqs[irq]++;
521 action = desc->action;
530 /* Call the ISR with cpu interrupts enabled */
531 ret = action->handler(irq, action->dev_id);
532 if (ret == IRQ_HANDLED)
533 status |= action->flags;
535 action = action->next;
538 if (status & IRQF_SAMPLE_RANDOM)
539 add_interrupt_randomness(irq);
543 if (retval != IRQ_HANDLED)
544 printk(KERN_ERR "ISR for TWL4030 module"
545 " irq %d can't handle interrupt\n",
549 * Here is where we should call the unmask method, but
550 * again we won't bother since it is NULL.
553 printk(KERN_CRIT "TWL4030 module irq %d has no ISR"
554 " but can't be masked!\n", irq);
556 printk(KERN_CRIT "TWL4030 module irq %d is disabled but can't"
557 " be masked!\n", irq);
560 static unsigned twl4030_irq_base;
563 * twl4030_irq_thread() runs as a kernel thread. It queries the twl4030
564 * interrupt controller to see which modules are generating interrupt requests
565 * and then calls the desc->handle method for each module requesting service.
567 static int twl4030_irq_thread(void *data)
570 irq_desc_t *desc = irq_desc + irq;
571 static unsigned i2c_errors;
572 const static unsigned max_i2c_errors = 100;
574 daemonize("twl4030-irq");
575 current->flags |= PF_NOFREEZE;
577 while (!kthread_should_stop()) {
582 wait_for_completion_interruptible(&irq_event);
584 ret = twl4030_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr,
587 printk(KERN_WARNING "I2C error %d while reading TWL4030"
588 " PIH ISR register.\n", ret);
589 if (++i2c_errors >= max_i2c_errors) {
590 printk(KERN_ERR "Maximum I2C error count"
591 " exceeded. Terminating %s.\n",
598 for (module_irq = twl4030_irq_base; 0 != pih_isr;
599 pih_isr >>= 1, module_irq++) {
601 irq_desc_t *d = irq_desc + module_irq;
605 d->handle_irq(module_irq, d);
611 desc->chip->unmask(irq);
618 * do_twl4030_irq() is the desc->handle method for the twl4030 interrupt.
619 * This is a chained interrupt, so there is no desc->action method for it.
620 * Now we need to query the interrupt controller in the twl4030 to determine
621 * which module is generating the interrupt request. However, we can't do i2c
622 * transactions in interrupt context, so we must defer that work to a kernel
623 * thread. All we do here is acknowledge and mask the interrupt and wakeup
626 static void do_twl4030_irq(unsigned int irq, irq_desc_t *desc)
628 const unsigned int cpu = smp_processor_id();
631 * Earlier this was desc->triggered = 1;
633 desc->status |= IRQ_LEVEL;
636 * Acknowledge, clear _AND_ disable the interrupt.
638 desc->chip->ack(irq);
641 kstat_cpu(cpu).irqs[irq]++;
643 complete(&irq_event);
647 static int add_children(struct twl4030_platform_data *pdata)
649 struct platform_device *pdev = NULL;
650 struct twl4030_client *twl = NULL;
654 pdev = platform_device_alloc("twl4030_rtc", -1);
656 twl = &twl4030_modules[TWL4030_SLAVENUM_NUM3];
657 pdev->dev.parent = &twl->client->dev;
658 device_init_wakeup(&pdev->dev, 1);
661 * FIXME add the relevant IRQ resource, and make the
662 * rtc driver use it instead of hard-wiring ...
664 * REVISIT platform_data here currently only supports
665 * setting up the "msecure" line ... which actually
666 * violates the "princple of least privilege", since
667 * it's effectively always in "high trust" mode.
669 * For now, expect equivalent treatment at board init:
670 * setting msecure high. Eventually, Linux might
671 * become more aware of those HW security concerns.
674 status = platform_device_add(pdev);
676 platform_device_put(pdev);
683 if (twl_has_keypad() && pdata->keypad) {
684 pdev = platform_device_alloc("twl4030_keypad", -1);
686 twl = &twl4030_modules[TWL4030_SLAVENUM_NUM2];
687 pdev->dev.parent = &twl->client->dev;
688 device_init_wakeup(&pdev->dev, 1);
689 status = platform_device_add_data(pdev, pdata->keypad,
690 sizeof(*pdata->keypad));
692 platform_device_put(pdev);
695 status = platform_device_add(pdev);
697 platform_device_put(pdev);
705 pr_err("failed to add twl4030's children\n");
709 static struct task_struct * __init start_twl4030_irq_thread(int irq)
711 struct task_struct *thread;
713 init_completion(&irq_event);
714 thread = kthread_run(twl4030_irq_thread, (void *)irq,
715 "twl4030 irq %d", irq);
717 pr_err("%s: could not create twl4030 irq %d thread!\n",
724 * These three functions should be part of Voltage frame work
725 * added here to complete the functionality for now.
727 static int __init protect_pm_master(void)
731 e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
736 static int __init unprotect_pm_master(void)
740 e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
742 e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
747 static int __init power_companion_init(void)
751 u8 ctrl = HFCLK_FREQ_26_MHZ;
754 if (cpu_is_omap2430())
755 osc = clk_get(NULL, "osc_ck");
757 osc = clk_get(NULL, "osc_sys_ck");
759 printk(KERN_WARNING "Skipping twl3040 internal clock init and "
760 "using bootloader value (unknown osc rate)\n");
764 rate = clk_get_rate(osc);
769 ctrl = HFCLK_FREQ_19p2_MHZ;
772 ctrl = HFCLK_FREQ_26_MHZ;
775 ctrl = HFCLK_FREQ_38p4_MHZ;
779 ctrl |= HIGH_PERF_SQ;
780 e |= unprotect_pm_master();
781 /* effect->MADC+USB ck en */
782 e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
783 e |= protect_pm_master();
789 * twl4030_i2c_clear_isr - clear TWL4030 SIH ISR regs via read + write
790 * @mod_no: TWL4030 module number
791 * @reg: register index to clear
792 * @cor: value of the <module>_SIH_CTRL.COR bit (1 or 0)
794 * Either reads (cor == 1) or writes (cor == 0) to a TWL4030 interrupt
795 * status register to ensure that any prior interrupts are cleared.
796 * Returns the status from the I2C read operation.
798 static int __init twl4030_i2c_clear_isr(u8 mod_no, u8 reg, u8 cor)
802 return (cor) ? twl4030_i2c_read_u8(mod_no, &tmp, reg) :
803 twl4030_i2c_write_u8(mod_no, 0xff, reg);
807 * twl4030_read_cor_bit - are TWL module ISRs cleared by reads or writes?
808 * @mod_no: TWL4030 module number
809 * @reg: register index to clear
811 * Returns 1 if the TWL4030 SIH interrupt status registers (ISRs) for
812 * the specified TWL module are cleared by reads, or 0 if cleared by
815 static int twl4030_read_cor_bit(u8 mod_no, u8 reg)
819 WARN_ON(twl4030_i2c_read_u8(mod_no, &tmp, reg) < 0);
821 tmp &= TWL4030_SIH_CTRL_COR_MASK;
822 tmp >>= __ffs(TWL4030_SIH_CTRL_COR_MASK);
828 * twl4030_mask_clear_intrs - mask and clear all TWL4030 interrupts
829 * @t: pointer to twl4030_mod_iregs array
830 * @t_sz: ARRAY_SIZE(t) (starting at 1)
832 * Mask all TWL4030 interrupt mask registers (IMRs) and clear all
833 * interrupt status registers (ISRs). No return value, but will WARN if
834 * any I2C operations fail.
836 static void __init twl4030_mask_clear_intrs(const struct twl4030_mod_iregs *t,
842 * N.B. - further efficiency is possible here. Eight I2C
843 * operations on BCI and GPIO modules are avoidable if I2C
844 * burst read/write transactions were implemented. Would
845 * probably save about 1ms of boot time and a small amount of
848 for (i = 0; i < t_sz; i++) {
849 const struct twl4030_mod_iregs tmr = t[i];
852 /* Are ISRs cleared by reads or writes? */
853 cor = twl4030_read_cor_bit(tmr.mod_no, tmr.sih_ctrl);
856 for (j = 0; j < tmr.reg_cnt; j++) {
858 /* Mask interrupts at the TWL4030 */
859 WARN_ON(twl4030_i2c_write_u8(tmr.mod_no, 0xff,
862 /* Clear TWL4030 ISRs */
863 WARN_ON(twl4030_i2c_clear_isr(tmr.mod_no,
864 tmr.isrs[j], cor) < 0);
872 static void twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
876 char *msg = "Unable to register interrupt subsystem";
879 * Mask and clear all TWL4030 interrupts since initially we do
880 * not have any TWL4030 module interrupt handlers present
882 twl4030_mask_clear_intrs(twl4030_mod_regs,
883 ARRAY_SIZE(twl4030_mod_regs));
885 twl4030_irq_base = irq_base;
887 /* install an irq handler for each of the PIH modules */
888 for (i = irq_base; i < irq_end; i++) {
889 set_irq_chip(i, &twl4030_irq_chip);
890 set_irq_handler(i, do_twl4030_module_irq);
891 set_irq_flags(i, IRQF_VALID);
894 /* install an irq handler to demultiplex the TWL4030 interrupt */
895 set_irq_data(irq_num, start_twl4030_irq_thread(irq_num));
896 set_irq_type(irq_num, IRQ_TYPE_EDGE_FALLING);
897 set_irq_chained_handler(irq_num, do_twl4030_irq);
899 res = power_companion_init();
901 pr_err("%s: %s[%d]\n", DRIVER_NAME, msg, res);
904 /*----------------------------------------------------------------------*/
906 static int twl4030_remove(struct i2c_client *client)
910 /* FIXME undo twl_init_irq() */
911 if (twl4030_irq_base) {
912 dev_err(&client->dev, "can't yet clean up IRQs?\n");
916 for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
917 struct twl4030_client *twl = &twl4030_modules[i];
919 if (twl->client && twl->client != client)
920 i2c_unregister_device(twl->client);
921 twl4030_modules[i].client = NULL;
922 twl4030_modules[i].inuse = false;
927 /* NOTE: this driver only handles a single twl4030/tps659x0 chip */
929 twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
933 struct twl4030_platform_data *pdata = client->dev.platform_data;
936 dev_dbg(&client->dev, "no platform data?\n");
940 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
941 dev_dbg(&client->dev, "can't talk I2C?\n");
945 for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
946 if (twl4030_modules[i].inuse || twl4030_irq_base) {
947 dev_dbg(&client->dev, "driver is already in use\n");
952 for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
953 struct twl4030_client *twl = &twl4030_modules[i];
955 twl->address = client->addr + i;
957 twl->client = client;
959 twl->client = i2c_new_dummy(client->adapter,
962 dev_err(&twl->client->dev,
963 "can't attach client %d\n", i);
967 strlcpy(twl->client->name, id->name,
968 sizeof(twl->client->name));
971 mutex_init(&twl->xfer_lock);
974 status = add_children(pdata);
979 * Check if the PIH module is initialized, if yes, then init
980 * the T2 Interrupt subsystem
982 if (twl4030_modules[twl4030_map[TWL4030_MODULE_PIH].sid].inuse
983 && twl4030_irq_base == 0
986 && pdata->irq_end > pdata->irq_base)
987 twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
989 dev_info(&client->dev, "chaining %d irqs\n",
991 ? (pdata->irq_end - pdata->irq_base)
996 twl4030_remove(client);
1000 static const struct i2c_device_id twl4030_ids[] = {
1001 { "twl4030", 0 }, /* "Triton 2" */
1002 { "tps65950", 0 }, /* catalog version of twl4030 */
1003 { "tps65930", 0 }, /* fewer LDOs and DACs; no charger */
1004 { "tps65920", 0 }, /* fewer LDOs; no codec or charger */
1005 { /* end of list */ },
1007 MODULE_DEVICE_TABLE(i2c, twl4030_ids);
1009 /* One Client Driver , 4 Clients */
1010 static struct i2c_driver twl4030_driver = {
1011 .driver.name = DRIVER_NAME,
1012 .id_table = twl4030_ids,
1013 .probe = twl4030_probe,
1014 .remove = twl4030_remove,
1017 static int __init twl4030_init(void)
1019 return i2c_add_driver(&twl4030_driver);
1021 subsys_initcall(twl4030_init);
1023 static void __exit twl4030_exit(void)
1025 i2c_del_driver(&twl4030_driver);
1027 module_exit(twl4030_exit);
1029 MODULE_AUTHOR("Texas Instruments, Inc.");
1030 MODULE_DESCRIPTION("I2C Core interface for TWL4030");
1031 MODULE_LICENSE("GPL");