#include <linux/i2c.h>
#include <linux/i2c/twl4030.h>
-#include <linux/i2c/twl4030-madc.h>
+
+
+/*
+ * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
+ * Management and System Companion Device" chips originally designed for
+ * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
+ * often at around 3 Mbit/sec, including for interrupt handling.
+ *
+ * This driver core provides genirq support for the interrupts emitted,
+ * by the various modules, and exports register access primitives.
+ *
+ * FIXME this driver currently requires use of the first interrupt line
+ * (and associated registers).
+ */
#define DRIVER_NAME "twl4030"
#define TWL4030_NUM_SLAVES 4
-/* Slave address */
-#define TWL4030_SLAVENUM_NUM0 0x00
-#define TWL4030_SLAVENUM_NUM1 0x01
-#define TWL4030_SLAVENUM_NUM2 0x02
-#define TWL4030_SLAVENUM_NUM3 0x03
-/* Base Address defns */
-/* USB ID */
+/* Base Address defns for twl4030_map[] */
+
+/* subchip/slave 0 - USB ID */
#define TWL4030_BASEADD_USB 0x0000
-/* AUD ID */
+
+/* subchip/slave 1 - AUD ID */
#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
#define TWL4030_BASEADD_GPIO 0x0098
-
#define TWL4030_BASEADD_INTBR 0x0085
#define TWL4030_BASEADD_PIH 0x0080
#define TWL4030_BASEADD_TEST 0x004C
-/* AUX ID */
+
+/* subchip/slave 2 - AUX ID */
#define TWL4030_BASEADD_INTERRUPTS 0x00B9
#define TWL4030_BASEADD_LED 0x00EE
#define TWL4030_BASEADD_MADC 0x0000
#define TWL4030_BASEADD_PWMA 0x00EF
#define TWL4030_BASEADD_PWMB 0x00F1
#define TWL4030_BASEADD_KEYPAD 0x00D2
-/* POWER ID */
+
+/* subchip/slave 3 - POWER ID */
#define TWL4030_BASEADD_BACKUP 0x0014
#define TWL4030_BASEADD_INT 0x002E
#define TWL4030_BASEADD_PM_MASTER 0x0036
#define TWL4030_BASEADD_RTC 0x001C
#define TWL4030_BASEADD_SECURED_REG 0x0000
-/* TWL4030 BCI registers */
-#define TWL4030_INTERRUPTS_BCIIMR1A 0x2
-#define TWL4030_INTERRUPTS_BCIIMR2A 0x3
-#define TWL4030_INTERRUPTS_BCIIMR1B 0x6
-#define TWL4030_INTERRUPTS_BCIIMR2B 0x7
-#define TWL4030_INTERRUPTS_BCIISR1A 0x0
-#define TWL4030_INTERRUPTS_BCIISR2A 0x1
-#define TWL4030_INTERRUPTS_BCIISR1B 0x4
-#define TWL4030_INTERRUPTS_BCIISR2B 0x5
-
-/* TWL4030 keypad registers */
-#define TWL4030_KEYPAD_KEYP_IMR1 0x12
-#define TWL4030_KEYPAD_KEYP_IMR2 0x14
-#define TWL4030_KEYPAD_KEYP_ISR1 0x11
-#define TWL4030_KEYPAD_KEYP_ISR2 0x13
-
-
/* Triton Core internal information (END) */
+
/* Few power values */
#define R_CFG_BOOT 0x05
#define R_PROTECT_KEY 0x0E
-/* access control */
+/* access control values for R_PROTECT_KEY */
#define KEY_UNLOCK1 0xce
#define KEY_UNLOCK2 0xec
#define KEY_LOCK 0x00
+/* some fields in R_CFG_BOOT */
#define HFCLK_FREQ_19p2_MHZ (1 << 0)
#define HFCLK_FREQ_26_MHZ (2 << 0)
#define HFCLK_FREQ_38p4_MHZ (3 << 0)
#define HIGH_PERF_SQ (1 << 3)
-/* SIH_CTRL registers that aren't defined elsewhere */
-#define TWL4030_INTERRUPTS_BCISIHCTRL 0x0d
-#define TWL4030_MADC_MADC_SIH_CTRL 0x67
-#define TWL4030_KEYPAD_KEYP_SIH_CTRL 0x17
+/*----------------------------------------------------------------------*/
/**
* struct twl4030_mod_iregs - TWL module IMR/ISR regs to mask/clear at init
},
{
.mod_no = TWL4030_MODULE_MADC,
- .sih_ctrl = TWL4030_MADC_MADC_SIH_CTRL,
+ .sih_ctrl = TWL4030_MADC_SIH_CTRL,
.reg_cnt = ARRAY_SIZE(twl4030_madc_imr_regs),
.imrs = twl4030_madc_imr_regs,
.isrs = twl4030_madc_isr_regs,
},
};
+/*----------------------------------------------------------------*/
-/* Data Structures */
-/* To have info on T2 IRQ substem activated or not */
-static struct completion irq_event;
+/* is driver active, bound to a chip? */
+static bool inuse;
-/* Structure to define on TWL4030 Slave ID */
+/* Structure for each TWL4030 Slave */
struct twl4030_client {
struct i2c_client *client;
u8 address;
- bool inuse;
/* max numb of i2c_msg required is for read =2 */
struct i2c_msg xfer_msg[2];
struct mutex xfer_lock;
};
-/* Module Mapping */
+static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
+
+
+/* mapping the module id to slave id and base address */
struct twl4030mapping {
unsigned char sid; /* Slave ID */
unsigned char base; /* base address */
};
-/* mapping the module id to slave id and base address */
static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
/*
* NOTE: don't change this table without updating the
* so they continue to match the order in this table.
*/
- { TWL4030_SLAVENUM_NUM0, TWL4030_BASEADD_USB },
-
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_AUDIO_VOICE },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_GPIO },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_INTBR },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_PIH },
- { TWL4030_SLAVENUM_NUM1, TWL4030_BASEADD_TEST },
-
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_KEYPAD },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MADC },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_INTERRUPTS },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_LED },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_MAIN_CHARGE },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PRECHARGE },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM0 },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWM1 },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMA },
- { TWL4030_SLAVENUM_NUM2, TWL4030_BASEADD_PWMB },
-
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_BACKUP },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_INT },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_MASTER },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_PM_RECEIVER },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_RTC },
- { TWL4030_SLAVENUM_NUM3, TWL4030_BASEADD_SECURED_REG },
+ { 0, TWL4030_BASEADD_USB },
+
+ { 1, TWL4030_BASEADD_AUDIO_VOICE },
+ { 1, TWL4030_BASEADD_GPIO },
+ { 1, TWL4030_BASEADD_INTBR },
+ { 1, TWL4030_BASEADD_PIH },
+ { 1, TWL4030_BASEADD_TEST },
+
+ { 2, TWL4030_BASEADD_KEYPAD },
+ { 2, TWL4030_BASEADD_MADC },
+ { 2, TWL4030_BASEADD_INTERRUPTS },
+ { 2, TWL4030_BASEADD_LED },
+ { 2, TWL4030_BASEADD_MAIN_CHARGE },
+ { 2, TWL4030_BASEADD_PRECHARGE },
+ { 2, TWL4030_BASEADD_PWM0 },
+ { 2, TWL4030_BASEADD_PWM1 },
+ { 2, TWL4030_BASEADD_PWMA },
+ { 2, TWL4030_BASEADD_PWMB },
+
+ { 3, TWL4030_BASEADD_BACKUP },
+ { 3, TWL4030_BASEADD_INT },
+ { 3, TWL4030_BASEADD_PM_MASTER },
+ { 3, TWL4030_BASEADD_PM_RECEIVER },
+ { 3, TWL4030_BASEADD_RTC },
+ { 3, TWL4030_BASEADD_SECURED_REG },
};
-static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
+/*----------------------------------------------------------------------*/
/*
* TWL4030 doesn't have PIH mask, hence dummy function for mask
- * and unmask.
+ * and unmask of the (eight) interrupts reported at that level ...
+ * masking is only available from SIH (secondary) modules.
*/
static void twl4030_i2c_ackirq(unsigned int irq)
{
}
-/* information for processing in the Work Item */
static struct irq_chip twl4030_irq_chip = {
.name = "twl4030",
.ack = twl4030_i2c_ackirq,
.unmask = twl4030_i2c_enableint,
};
-/* Global Functions */
+/*----------------------------------------------------------------------*/
+
+/* Exported Functions */
/**
* twl4030_i2c_write - Writes a n bit register in TWL4030
sid = twl4030_map[mod_no].sid;
twl = &twl4030_modules[sid];
- if (unlikely(!twl->inuse)) {
+ if (unlikely(!inuse)) {
pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
return -EPERM;
}
sid = twl4030_map[mod_no].sid;
twl = &twl4030_modules[sid];
- if (unlikely(!twl->inuse)) {
+ if (unlikely(!inuse)) {
pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
return -EPERM;
}
}
EXPORT_SYMBOL(twl4030_i2c_read_u8);
-/* Helper Functions */
+/*----------------------------------------------------------------------*/
/*
* do_twl4030_module_irq() is the desc->handle method for each of the twl4030
- * module interrupts. It executes in kernel thread context.
- * On entry, cpu interrupts are disabled.
+ * module interrupts that doesn't chain to another irq_chip (GPIO, power, etc).
+ * It executes in kernel thread context. On entry, cpu interrupts are disabled.
*/
static void do_twl4030_module_irq(unsigned int irq, irq_desc_t *desc)
{
static unsigned twl4030_irq_base;
+static struct completion irq_event;
+
/*
- * twl4030_irq_thread() runs as a kernel thread. It queries the twl4030
- * interrupt controller to see which modules are generating interrupt requests
- * and then calls the desc->handle method for each module requesting service.
+ * This thread processes interrupts reported by the Primary Interrupt Handler.
*/
static int twl4030_irq_thread(void *data)
{
int module_irq;
u8 pih_isr;
+ /* Wait for IRQ, then read PIH irq status (also blocking) */
wait_for_completion_interruptible(&irq_event);
ret = twl4030_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr,
REG_PIH_ISR_P1);
if (ret) {
- printk(KERN_WARNING "I2C error %d while reading TWL4030"
- " PIH ISR register.\n", ret);
+ pr_warning("%s: I2C error %d reading PIH ISR\n",
+ DRIVER_NAME, ret);
if (++i2c_errors >= max_i2c_errors) {
printk(KERN_ERR "Maximum I2C error count"
" exceeded. Terminating %s.\n",
__func__);
break;
}
+ complete(&irq_event);
continue;
}
- for (module_irq = twl4030_irq_base; 0 != pih_isr;
- pih_isr >>= 1, module_irq++) {
+ /* these handlers deal with the relevant SIH irq status */
+ local_irq_disable();
+ for (module_irq = twl4030_irq_base;
+ pih_isr;
+ pih_isr >>= 1, module_irq++) {
if (pih_isr & 0x1) {
irq_desc_t *d = irq_desc + module_irq;
- local_irq_disable();
-
d->handle_irq(module_irq, d);
-
- local_irq_enable();
}
}
+ local_irq_enable();
desc->chip->unmask(irq);
}
}
}
+static struct task_struct * __init start_twl4030_irq_thread(long irq)
+{
+ struct task_struct *thread;
+
+ init_completion(&irq_event);
+ thread = kthread_run(twl4030_irq_thread, (void *)irq,
+ "twl4030 irq %ld", irq);
+ if (!thread)
+ pr_err("%s: could not create twl4030 irq %ld thread!\n",
+ DRIVER_NAME, irq);
+
+ return thread;
+}
+
+/*----------------------------------------------------------------------*/
+
static int add_children(struct twl4030_platform_data *pdata)
{
struct platform_device *pdev = NULL;
int status = 0;
if (twl_has_bci() && pdata->bci) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM3];
+ twl = &twl4030_modules[3];
pdev = platform_device_alloc("twl4030_bci", -1);
if (!pdev) {
}
if (twl_has_gpio() && pdata->gpio) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM1];
+ twl = &twl4030_modules[1];
pdev = platform_device_alloc("twl4030_gpio", -1);
if (!pdev) {
if (twl_has_keypad() && pdata->keypad) {
pdev = platform_device_alloc("twl4030_keypad", -1);
if (pdev) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM2];
+ twl = &twl4030_modules[2];
pdev->dev.parent = &twl->client->dev;
device_init_wakeup(&pdev->dev, 1);
status = platform_device_add_data(pdev, pdata->keypad,
if (twl_has_madc() && pdata->madc) {
pdev = platform_device_alloc("twl4030_madc", -1);
if (pdev) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM2];
+ twl = &twl4030_modules[2];
pdev->dev.parent = &twl->client->dev;
device_init_wakeup(&pdev->dev, 1);
status = platform_device_add_data(pdev, pdata->madc,
}
if (twl_has_rtc()) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM3];
+ twl = &twl4030_modules[3];
pdev = platform_device_alloc("twl4030_rtc", -1);
if (!pdev) {
}
if (twl_has_usb() && pdata->usb) {
- twl = &twl4030_modules[TWL4030_SLAVENUM_NUM0];
+ twl = &twl4030_modules[0];
pdev = platform_device_alloc("twl4030_usb", -1);
if (!pdev) {
return status;
}
-static struct task_struct * __init start_twl4030_irq_thread(long irq)
-{
- struct task_struct *thread;
-
- init_completion(&irq_event);
- thread = kthread_run(twl4030_irq_thread, (void *)irq,
- "twl4030 irq %ld", irq);
- if (!thread)
- pr_err("%s: could not create twl4030 irq %ld thread!\n",
- DRIVER_NAME, irq);
-
- return thread;
-}
+/*----------------------------------------------------------------------*/
/*
- * These three functions should be part of Voltage frame work
- * added here to complete the functionality for now.
+ * These three functions initialize the on-chip clock framework,
+ * letting it generate the right frequencies for USB, MADC, and
+ * other purposes.
*/
-static int __init protect_pm_master(void)
+static inline int __init protect_pm_master(void)
{
int e = 0;
return e;
}
-static int __init unprotect_pm_master(void)
+static inline int __init unprotect_pm_master(void)
{
int e = 0;
return e;
}
-static int __init power_companion_init(void)
+static void __init clocks_init(void)
{
int e = 0;
struct clk *osc;
else
osc = clk_get(NULL, "osc_sys_ck");
#else
+ /* REVISIT for non-OMAP systems, pass the clock rate from
+ * board init code, using platform_data.
+ */
osc = ERR_PTR(-EIO);
#endif
if (IS_ERR(osc)) {
printk(KERN_WARNING "Skipping twl4030 internal clock init and "
"using bootloader value (unknown osc rate)\n");
- return 0;
+ return;
}
rate = clk_get_rate(osc);
e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
e |= protect_pm_master();
- return e;
+ if (e < 0)
+ pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
}
+/*----------------------------------------------------------------------*/
+
/**
* twl4030_i2c_clear_isr - clear TWL4030 SIH ISR regs via read + write
* @mod_no: TWL4030 module number
tmr.isrs[j], cor) < 0);
}
}
-
- return;
}
static void twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
{
int i;
- int res = 0;
- char *msg = "Unable to register interrupt subsystem";
/*
* Mask and clear all TWL4030 interrupts since initially we do
/* install an irq handler to demultiplex the TWL4030 interrupt */
set_irq_data(irq_num, start_twl4030_irq_thread(irq_num));
- set_irq_type(irq_num, IRQ_TYPE_EDGE_FALLING);
set_irq_chained_handler(irq_num, do_twl4030_irq);
-
- res = power_companion_init();
- if (res < 0)
- pr_err("%s: %s[%d]\n", DRIVER_NAME, msg, res);
}
/*----------------------------------------------------------------------*/
if (twl->client && twl->client != client)
i2c_unregister_device(twl->client);
twl4030_modules[i].client = NULL;
- twl4030_modules[i].inuse = false;
}
+ inuse = false;
return 0;
}
return -EIO;
}
- for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
- if (twl4030_modules[i].inuse || twl4030_irq_base) {
- dev_dbg(&client->dev, "driver is already in use\n");
- return -EBUSY;
- }
+ if (inuse || twl4030_irq_base) {
+ dev_dbg(&client->dev, "driver is already in use\n");
+ return -EBUSY;
}
for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
strlcpy(twl->client->name, id->name,
sizeof(twl->client->name));
}
- twl->inuse = true;
mutex_init(&twl->xfer_lock);
}
+ inuse = true;
- /*
- * Check if the PIH module is initialized, if yes, then init
- * the T2 Interrupt subsystem
- */
- if (twl4030_modules[twl4030_map[TWL4030_MODULE_PIH].sid].inuse
- && twl4030_irq_base == 0
- && client->irq
+ /* setup clock framework */
+ clocks_init();
+
+ /* Maybe init the T2 Interrupt subsystem */
+ if (client->irq
&& pdata->irq_base
&& pdata->irq_end > pdata->irq_base) {
twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
{ "tps65950", 0 }, /* catalog version of twl4030 */
{ "tps65930", 0 }, /* fewer LDOs and DACs; no charger */
{ "tps65920", 0 }, /* fewer LDOs; no codec or charger */
+ { "twl5030", 0 }, /* T2 updated */
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(i2c, twl4030_ids);
projects / linux-2.6-omap-h63xx.git / commitdiff