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[ARM] 4144/1: Fix for patch #4099/1 with CONFIG_I2C_PXA_SLAVE set

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Switch the i2c-pxa driver to actually using the platform device information and let it handle the power i2c bus on pxa27x too. Original version of this patch didn't compile with CONFIG_I2C_PXA_SLAVE set.

Signed-off-by: G. Liakhovetski <gl@dsa-ac.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Guennadi Liakhovetski 2007-02-08 09:43:26 +01:00 committed by Russell King
parent ae0a846e41
commit a7b4e5506d
2 changed files with 188 additions and 77 deletions
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24
arch/arm/mach-pxa/generic.c
View file

@ -338,6 +338,27 @@ static struct platform_device i2c_device = {
.num_resources = ARRAY_SIZE(i2c_resources), .num_resources = ARRAY_SIZE(i2c_resources),
}; };
#ifdef CONFIG_PXA27x
static struct resource i2c_power_resources[] = {
{
.start = 0x40f00180,
.end = 0x40f001a3,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_PWRI2C,
.end = IRQ_PWRI2C,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device i2c_power_device = {
.name = "pxa2xx-i2c",
.id = 1,
.resource = i2c_power_resources,
.num_resources = ARRAY_SIZE(i2c_resources),
};
#endif
void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info) void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
{ {
i2c_device.dev.platform_data = info; i2c_device.dev.platform_data = info;
@ -392,6 +413,9 @@ static struct platform_device *devices[] __initdata = {
&stuart_device, &stuart_device,
&pxaficp_device, &pxaficp_device,
&i2c_device, &i2c_device,
#ifdef CONFIG_PXA27x
&i2c_power_device,
#endif
&i2s_device, &i2s_device,
&pxartc_device, &pxartc_device,
}; };

237
drivers/i2c/busses/i2c-pxa.c
View file

@ -34,6 +34,7 @@
#include <asm/hardware.h> #include <asm/hardware.h>
#include <asm/irq.h> #include <asm/irq.h>
#include <asm/io.h>
#include <asm/arch/i2c.h> #include <asm/arch/i2c.h>
#include <asm/arch/pxa-regs.h> #include <asm/arch/pxa-regs.h>
@ -54,8 +55,21 @@ struct pxa_i2c {
unsigned int irqlogidx; unsigned int irqlogidx;
u32 isrlog[32]; u32 isrlog[32];
u32 icrlog[32]; u32 icrlog[32];
void __iomem *reg_base;
unsigned long iobase;
unsigned long iosize;
int irq;
}; };
#define _IBMR(i2c) ((i2c)->reg_base + 0)
#define _IDBR(i2c) ((i2c)->reg_base + 8)
#define _ICR(i2c) ((i2c)->reg_base + 0x10)
#define _ISR(i2c) ((i2c)->reg_base + 0x18)
#define _ISAR(i2c) ((i2c)->reg_base + 0x20)
/* /*
* I2C Slave mode address * I2C Slave mode address
*/ */
@ -130,7 +144,8 @@ static unsigned int i2c_debug = DEBUG;
static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname) static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname)
{ {
dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno, ISR, ICR, IBMR); dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno,
readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c)));
} }
#define show_state(i2c) i2c_pxa_show_state(i2c, __LINE__, __FUNCTION__) #define show_state(i2c) i2c_pxa_show_state(i2c, __LINE__, __FUNCTION__)
@ -153,7 +168,7 @@ static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why)
printk("i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n", printk("i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n",
i2c->msg_num, i2c->msg_idx, i2c->msg_ptr); i2c->msg_num, i2c->msg_idx, i2c->msg_ptr);
printk("i2c: ICR: %08x ISR: %08x\n" printk("i2c: ICR: %08x ISR: %08x\n"
"i2c: log: ", ICR, ISR); "i2c: log: ", readl(_ICR(i2c)), readl(_ISR(i2c)));
for (i = 0; i < i2c->irqlogidx; i++) for (i = 0; i < i2c->irqlogidx; i++)
printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]); printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]);
printk("\n"); printk("\n");
@ -161,7 +176,7 @@ static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why)
static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c) static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c)
{ {
return !(ICR & ICR_SCLE); return !(readl(_ICR(i2c)) & ICR_SCLE);
} }
static void i2c_pxa_abort(struct pxa_i2c *i2c) static void i2c_pxa_abort(struct pxa_i2c *i2c)
@ -173,28 +188,29 @@ static void i2c_pxa_abort(struct pxa_i2c *i2c)
return; return;
} }
while (time_before(jiffies, timeout) && (IBMR & 0x1) == 0) { while (time_before(jiffies, timeout) && (readl(_IBMR(i2c)) & 0x1) == 0) {
unsigned long icr = ICR; unsigned long icr = readl(_ICR(i2c));
icr &= ~ICR_START; icr &= ~ICR_START;
icr |= ICR_ACKNAK | ICR_STOP | ICR_TB; icr |= ICR_ACKNAK | ICR_STOP | ICR_TB;
ICR = icr; writel(icr, _ICR(i2c));
show_state(i2c); show_state(i2c);
msleep(1); msleep(1);
} }
ICR &= ~(ICR_MA | ICR_START | ICR_STOP); writel(readl(_ICR(i2c)) & ~(ICR_MA | ICR_START | ICR_STOP),
_ICR(i2c));
} }
static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c) static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c)
{ {
int timeout = DEF_TIMEOUT; int timeout = DEF_TIMEOUT;
while (timeout-- && ISR & (ISR_IBB | ISR_UB)) { while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) {
if ((ISR & ISR_SAD) != 0) if ((readl(_ISR(i2c)) & ISR_SAD) != 0)
timeout += 4; timeout += 4;
msleep(2); msleep(2);
@ -214,9 +230,9 @@ static int i2c_pxa_wait_master(struct pxa_i2c *i2c)
while (time_before(jiffies, timeout)) { while (time_before(jiffies, timeout)) {
if (i2c_debug > 1) if (i2c_debug > 1)
dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n",
__func__, (long)jiffies, ISR, ICR, IBMR); __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c)));
if (ISR & ISR_SAD) { if (readl(_ISR(i2c)) & ISR_SAD) {
if (i2c_debug > 0) if (i2c_debug > 0)
dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__); dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__);
goto out; goto out;
@ -226,7 +242,7 @@ static int i2c_pxa_wait_master(struct pxa_i2c *i2c)
* quick check of the i2c lines themselves to ensure they've * quick check of the i2c lines themselves to ensure they've
* gone high... * gone high...
*/ */
if ((ISR & (ISR_UB | ISR_IBB)) == 0 && IBMR == 3) { if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && readl(_IBMR(i2c)) == 3) {
if (i2c_debug > 0) if (i2c_debug > 0)
dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); dev_dbg(&i2c->adap.dev, "%s: done\n", __func__);
return 1; return 1;
@ -246,7 +262,7 @@ static int i2c_pxa_set_master(struct pxa_i2c *i2c)
if (i2c_debug) if (i2c_debug)
dev_dbg(&i2c->adap.dev, "setting to bus master\n"); dev_dbg(&i2c->adap.dev, "setting to bus master\n");
if ((ISR & (ISR_UB | ISR_IBB)) != 0) { if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) != 0) {
dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__); dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__);
if (!i2c_pxa_wait_master(i2c)) { if (!i2c_pxa_wait_master(i2c)) {
dev_dbg(&i2c->adap.dev, "%s: error: unit busy\n", __func__); dev_dbg(&i2c->adap.dev, "%s: error: unit busy\n", __func__);
@ -254,7 +270,7 @@ static int i2c_pxa_set_master(struct pxa_i2c *i2c)
} }
} }
ICR |= ICR_SCLE; writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c));
return 0; return 0;
} }
@ -270,11 +286,11 @@ static int i2c_pxa_wait_slave(struct pxa_i2c *i2c)
while (time_before(jiffies, timeout)) { while (time_before(jiffies, timeout)) {
if (i2c_debug > 1) if (i2c_debug > 1)
dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n",
__func__, (long)jiffies, ISR, ICR, IBMR); __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c)));
if ((ISR & (ISR_UB|ISR_IBB)) == 0 || if ((readl(_ISR(i2c)) & (ISR_UB|ISR_IBB)) == 0 ||
(ISR & ISR_SAD) != 0 || (readl(_ISR(i2c)) & ISR_SAD) != 0 ||
(ICR & ICR_SCLE) == 0) { (readl(_ICR(i2c)) & ICR_SCLE) == 0) {
if (i2c_debug > 1) if (i2c_debug > 1)
dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); dev_dbg(&i2c->adap.dev, "%s: done\n", __func__);
return 1; return 1;
@ -302,9 +318,9 @@ static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode)
/* we need to wait for the stop condition to end */ /* we need to wait for the stop condition to end */
/* if we where in stop, then clear... */ /* if we where in stop, then clear... */
if (ICR & ICR_STOP) { if (readl(_ICR(i2c)) & ICR_STOP) {
udelay(100); udelay(100);
ICR &= ~ICR_STOP; writel(readl(_ICR(i2c)) & ~ICR_STOP, _ICR(i2c));
} }
if (!i2c_pxa_wait_slave(i2c)) { if (!i2c_pxa_wait_slave(i2c)) {
@ -314,12 +330,12 @@ static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode)
} }
} }
ICR &= ~(ICR_STOP|ICR_ACKNAK|ICR_MA); writel(readl(_ICR(i2c)) & ~(ICR_STOP|ICR_ACKNAK|ICR_MA), _ICR(i2c));
ICR &= ~ICR_SCLE; writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c));
if (i2c_debug) { if (i2c_debug) {
dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", ICR, ISR); dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", readl(_ICR(i2c)), readl(_ISR(i2c)));
decode_ICR(ICR); decode_ICR(readl(_ICR(i2c)));
} }
} }
#else #else
@ -334,24 +350,24 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
i2c_pxa_abort(i2c); i2c_pxa_abort(i2c);
/* reset according to 9.8 */ /* reset according to 9.8 */
ICR = ICR_UR; writel(ICR_UR, _ICR(i2c));
ISR = I2C_ISR_INIT; writel(I2C_ISR_INIT, _ISR(i2c));
ICR &= ~ICR_UR; writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
ISAR = i2c->slave_addr; writel(i2c->slave_addr, _ISAR(i2c));
/* set control register values */ /* set control register values */
ICR = I2C_ICR_INIT; writel(I2C_ICR_INIT, _ICR(i2c));
#ifdef CONFIG_I2C_PXA_SLAVE #ifdef CONFIG_I2C_PXA_SLAVE
dev_info(&i2c->adap.dev, "Enabling slave mode\n"); dev_info(&i2c->adap.dev, "Enabling slave mode\n");
ICR |= ICR_SADIE | ICR_ALDIE | ICR_SSDIE; writel(readl(_ICR(i2c)) | ICR_SADIE | ICR_ALDIE | ICR_SSDIE, _ICR(i2c));
#endif #endif
i2c_pxa_set_slave(i2c, 0); i2c_pxa_set_slave(i2c, 0);
/* enable unit */ /* enable unit */
ICR |= ICR_IUE; writel(readl(_ICR(i2c)) | ICR_IUE, _ICR(i2c));
udelay(100); udelay(100);
} }
@ -371,19 +387,19 @@ static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr)
if (i2c->slave != NULL) if (i2c->slave != NULL)
ret = i2c->slave->read(i2c->slave->data); ret = i2c->slave->read(i2c->slave->data);
IDBR = ret; writel(ret, _IDBR(i2c));
ICR |= ICR_TB; /* allow next byte */ writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); /* allow next byte */
} }
} }
static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr)
{ {
unsigned int byte = IDBR; unsigned int byte = readl(_IDBR(i2c));
if (i2c->slave != NULL) if (i2c->slave != NULL)
i2c->slave->write(i2c->slave->data, byte); i2c->slave->write(i2c->slave->data, byte);
ICR |= ICR_TB; writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c));
} }
static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr)
@ -403,13 +419,13 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr)
* start condition... if this happens, we'd better back off * start condition... if this happens, we'd better back off
* and stop holding the poor thing up * and stop holding the poor thing up
*/ */
ICR &= ~(ICR_START|ICR_STOP); writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c));
ICR |= ICR_TB; writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c));
timeout = 0x10000; timeout = 0x10000;
while (1) { while (1) {
if ((IBMR & 2) == 2) if ((readl(_IBMR(i2c)) & 2) == 2)
break; break;
timeout--; timeout--;
@ -420,7 +436,7 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr)
} }
} }
ICR &= ~ICR_SCLE; writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c));
} }
static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) static void i2c_pxa_slave_stop(struct pxa_i2c *i2c)
@ -447,14 +463,14 @@ static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr)
if (isr & ISR_BED) { if (isr & ISR_BED) {
/* what should we do here? */ /* what should we do here? */
} else { } else {
IDBR = 0; writel(0, _IDBR(i2c));
ICR |= ICR_TB; writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c));
} }
} }
static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr)
{ {
ICR |= ICR_TB | ICR_ACKNAK; writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c));
} }
static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr)
@ -466,13 +482,13 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr)
* start condition... if this happens, we'd better back off * start condition... if this happens, we'd better back off
* and stop holding the poor thing up * and stop holding the poor thing up
*/ */
ICR &= ~(ICR_START|ICR_STOP); writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c));
ICR |= ICR_TB | ICR_ACKNAK; writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c));
timeout = 0x10000; timeout = 0x10000;
while (1) { while (1) {
if ((IBMR & 2) == 2) if ((readl(_IBMR(i2c)) & 2) == 2)
break; break;
timeout--; timeout--;
@ -483,7 +499,7 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr)
} }
} }
ICR &= ~ICR_SCLE; writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c));
} }
static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) static void i2c_pxa_slave_stop(struct pxa_i2c *i2c)
@ -514,13 +530,13 @@ static inline void i2c_pxa_start_message(struct pxa_i2c *i2c)
/* /*
* Step 1: target slave address into IDBR * Step 1: target slave address into IDBR
*/ */
IDBR = i2c_pxa_addr_byte(i2c->msg); writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c));
/* /*
* Step 2: initiate the write. * Step 2: initiate the write.
*/ */
icr = ICR & ~(ICR_STOP | ICR_ALDIE); icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE);
ICR = icr | ICR_START | ICR_TB; writel(icr | ICR_START | ICR_TB, _ICR(i2c));
} }
/* /*
@ -594,7 +610,7 @@ static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret)
static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr)
{ {
u32 icr = ICR & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB);
again: again:
/* /*
@ -645,7 +661,7 @@ static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr)
/* /*
* Write mode. Write the next data byte. * Write mode. Write the next data byte.
*/ */
IDBR = i2c->msg->buf[i2c->msg_ptr++]; writel(i2c->msg->buf[i2c->msg_ptr++], _IDBR(i2c));
icr |= ICR_ALDIE | ICR_TB; icr |= ICR_ALDIE | ICR_TB;
@ -675,7 +691,7 @@ static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr)
/* /*
* Write the next address. * Write the next address.
*/ */
IDBR = i2c_pxa_addr_byte(i2c->msg); writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c));
/* /*
* And trigger a repeated start, and send the byte. * And trigger a repeated start, and send the byte.
@ -696,18 +712,18 @@ static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr)
i2c->icrlog[i2c->irqlogidx-1] = icr; i2c->icrlog[i2c->irqlogidx-1] = icr;
ICR = icr; writel(icr, _ICR(i2c));
show_state(i2c); show_state(i2c);
} }
static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr)
{ {
u32 icr = ICR & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB);
/* /*
* Read the byte. * Read the byte.
*/ */
i2c->msg->buf[i2c->msg_ptr++] = IDBR; i2c->msg->buf[i2c->msg_ptr++] = readl(_IDBR(i2c));
if (i2c->msg_ptr < i2c->msg->len) { if (i2c->msg_ptr < i2c->msg->len) {
/* /*
@ -724,17 +740,17 @@ static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr)
i2c->icrlog[i2c->irqlogidx-1] = icr; i2c->icrlog[i2c->irqlogidx-1] = icr;
ICR = icr; writel(icr, _ICR(i2c));
} }
static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id) static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
{ {
struct pxa_i2c *i2c = dev_id; struct pxa_i2c *i2c = dev_id;
u32 isr = ISR; u32 isr = readl(_ISR(i2c));
if (i2c_debug > 2 && 0) { if (i2c_debug > 2 && 0) {
dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n", dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n",
__func__, isr, ICR, IBMR); __func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c)));
decode_ISR(isr); decode_ISR(isr);
} }
@ -746,7 +762,7 @@ static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
/* /*
* Always clear all pending IRQs. * Always clear all pending IRQs.
*/ */
ISR = isr & (ISR_SSD|ISR_ALD|ISR_ITE|ISR_IRF|ISR_SAD|ISR_BED); writel(isr & (ISR_SSD|ISR_ALD|ISR_ITE|ISR_IRF|ISR_SAD|ISR_BED), _ISR(i2c));
if (isr & ISR_SAD) if (isr & ISR_SAD)
i2c_pxa_slave_start(i2c, isr); i2c_pxa_slave_start(i2c, isr);
@ -779,7 +795,7 @@ static int i2c_pxa_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num
/* If the I2C controller is disabled we need to reset it (probably due /* If the I2C controller is disabled we need to reset it (probably due
to a suspend/resume destroying state). We do this here as we can then to a suspend/resume destroying state). We do this here as we can then
avoid worrying about resuming the controller before its users. */ avoid worrying about resuming the controller before its users. */
if (!(ICR & ICR_IUE)) if (!(readl(_ICR(i2c)) & ICR_IUE))
i2c_pxa_reset(i2c); i2c_pxa_reset(i2c);
for (i = adap->retries; i >= 0; i--) { for (i = adap->retries; i >= 0; i--) {
@ -810,28 +826,53 @@ static const struct i2c_algorithm i2c_pxa_algorithm = {
static struct pxa_i2c i2c_pxa = { static struct pxa_i2c i2c_pxa = {
.lock = SPIN_LOCK_UNLOCKED, .lock = SPIN_LOCK_UNLOCKED,
.wait = __WAIT_QUEUE_HEAD_INITIALIZER(i2c_pxa.wait),
.adap = { .adap = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.algo = &i2c_pxa_algorithm, .algo = &i2c_pxa_algorithm,
.name = "pxa2xx-i2c", .name = "pxa2xx-i2c.0",
.retries = 5, .retries = 5,
}, },
}; };
#define res_len(r) ((r)->end - (r)->start + 1)
static int i2c_pxa_probe(struct platform_device *dev) static int i2c_pxa_probe(struct platform_device *dev)
{ {
struct pxa_i2c *i2c = &i2c_pxa; struct pxa_i2c *i2c = &i2c_pxa;
struct resource *res;
#ifdef CONFIG_I2C_PXA_SLAVE #ifdef CONFIG_I2C_PXA_SLAVE
struct i2c_pxa_platform_data *plat = dev->dev.platform_data; struct i2c_pxa_platform_data *plat = dev->dev.platform_data;
#endif #endif
int ret; int ret;
int irq;
#ifdef CONFIG_PXA27x res = platform_get_resource(dev, IORESOURCE_MEM, 0);
pxa_gpio_mode(GPIO117_I2CSCL_MD); irq = platform_get_irq(dev, 0);
pxa_gpio_mode(GPIO118_I2CSDA_MD); if (res == NULL || irq < 0)
udelay(100); return -ENODEV;
#endif
if (!request_mem_region(res->start, res_len(res), res->name))
return -ENOMEM;
i2c = kmalloc(sizeof(struct pxa_i2c), GFP_KERNEL);
if (!i2c) {
ret = -ENOMEM;
goto emalloc;
}
memcpy(i2c, &i2c_pxa, sizeof(struct pxa_i2c));
init_waitqueue_head(&i2c->wait);
i2c->adap.name[strlen(i2c->adap.name) - 1] = '0' + dev->id % 10;
i2c->reg_base = ioremap(res->start, res_len(res));
if (!i2c->reg_base) {
ret = -EIO;
goto eremap;
}
i2c->iobase = res->start;
i2c->iosize = res_len(res);
i2c->irq = irq;
i2c->slave_addr = I2C_PXA_SLAVE_ADDR; i2c->slave_addr = I2C_PXA_SLAVE_ADDR;
@ -842,11 +883,28 @@ static int i2c_pxa_probe(struct platform_device *dev)
} }
#endif #endif
switch (dev->id) {
case 0:
#ifdef CONFIG_PXA27x
pxa_gpio_mode(GPIO117_I2CSCL_MD);
pxa_gpio_mode(GPIO118_I2CSDA_MD);
#endif
pxa_set_cken(CKEN14_I2C, 1); pxa_set_cken(CKEN14_I2C, 1);
ret = request_irq(IRQ_I2C, i2c_pxa_handler, IRQF_DISABLED, break;
"pxa2xx-i2c", i2c); #ifdef CONFIG_PXA27x
case 1:
local_irq_disable();
PCFR |= PCFR_PI2CEN;
local_irq_enable();
pxa_set_cken(CKEN15_PWRI2C, 1);
#endif
}
ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED,
i2c->adap.name, i2c);
if (ret) if (ret)
goto out; goto ereqirq;
i2c_pxa_reset(i2c); i2c_pxa_reset(i2c);
@ -856,7 +914,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
ret = i2c_add_adapter(&i2c->adap); ret = i2c_add_adapter(&i2c->adap);
if (ret < 0) { if (ret < 0) {
printk(KERN_INFO "I2C: Failed to add bus\n"); printk(KERN_INFO "I2C: Failed to add bus\n");
goto err_irq; goto eadapt;
} }
platform_set_drvdata(dev, i2c); platform_set_drvdata(dev, i2c);
@ -870,9 +928,25 @@ static int i2c_pxa_probe(struct platform_device *dev)
#endif #endif
return 0; return 0;
err_irq: eadapt:
free_irq(IRQ_I2C, i2c); free_irq(irq, i2c);
out: ereqirq:
switch (dev->id) {
case 0:
pxa_set_cken(CKEN14_I2C, 0);
break;
#ifdef CONFIG_PXA27x
case 1:
pxa_set_cken(CKEN15_PWRI2C, 0);
local_irq_disable();
PCFR &= ~PCFR_PI2CEN;
local_irq_enable();
#endif
}
eremap:
kfree(i2c);
emalloc:
release_mem_region(res->start, res_len(res));
return ret; return ret;
} }
@ -883,8 +957,21 @@ static int i2c_pxa_remove(struct platform_device *dev)
platform_set_drvdata(dev, NULL); platform_set_drvdata(dev, NULL);
i2c_del_adapter(&i2c->adap); i2c_del_adapter(&i2c->adap);
free_irq(IRQ_I2C, i2c); free_irq(i2c->irq, i2c);
switch (dev->id) {
case 0:
pxa_set_cken(CKEN14_I2C, 0); pxa_set_cken(CKEN14_I2C, 0);
break;
#ifdef CONFIG_PXA27x
case 1:
pxa_set_cken(CKEN15_PWRI2C, 0);
local_irq_disable();
PCFR &= ~PCFR_PI2CEN;
local_irq_enable();
#endif
}
release_mem_region(i2c->iobase, i2c->iosize);
kfree(i2c);
return 0; return 0;
} }