diff options
author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-19 16:18:39 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-19 16:18:39 -0500 |
commit | 59b8175c771040afcd4ad67022b0cc80c216b866 (patch) | |
tree | 4ef5935bee1e342716d49b9d4b99e3fa835526e6 /drivers/i2c | |
parent | 920841d8d1d61bc12b43f95a579a5374f6d98f81 (diff) | |
parent | 3b0eb4a195a124567cd0dd6f700f8388def542c6 (diff) |
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (117 commits)
[ARM] 4058/2: iop32x: set ->broken_parity_status on n2100 onboard r8169 ports
[ARM] 4140/1: AACI stability add ac97 timeout and retries
[ARM] 4139/1: AACI record support
[ARM] 4138/1: AACI: multiple channel support for IRQ handling
[ARM] 4211/1: Provide a defconfig for ns9xxx
[ARM] 4210/1: base for new machine type "NetSilicon NS9360"
[ARM] 4222/1: S3C2443: Remove reference to missing S3C2443_PM
[ARM] 4221/1: S3C2443: DMA support
[ARM] 4220/1: S3C24XX: DMA system initialised from sysdev
[ARM] 4219/1: S3C2443: DMA source definitions
[ARM] 4218/1: S3C2412: fix CONFIG_CPU_S3C2412_ONLY wrt to S3C2443
[ARM] 4217/1: S3C24XX: remove the dma channel show at startup
[ARM] 4090/2: avoid clash between PXA and SA1111 defines
[ARM] 4216/1: add .gitignore entries for ARM specific files
[ARM] 4214/2: S3C2410: Add Armzone QT2410
[ARM] 4215/1: s3c2410 usb device: per-platform vbus_draw
[ARM] 4213/1: S3C2410 - Update definition of ADCTSC_XY_PST
[ARM] 4098/1: ARM: rtc_lock only used with rtc_cmos
[ARM] 4137/1: Add kexec support
[ARM] 4201/1: SMP barriers pair needed for the secondary boot process
...
Fix up conflict due to typedef removal in sound/arm/aaci.h
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/busses/i2c-iop3xx.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-pxa.c | 241 |
2 files changed, 165 insertions, 78 deletions
diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c index 20ee4f7c53a0..90e2d9350c1b 100644 --- a/drivers/i2c/busses/i2c-iop3xx.c +++ b/drivers/i2c/busses/i2c-iop3xx.c | |||
@@ -83,7 +83,7 @@ iop3xx_i2c_enable(struct i2c_algo_iop3xx_data *iop3xx_adap) | |||
83 | * Every time unit enable is asserted, GPOD needs to be cleared | 83 | * Every time unit enable is asserted, GPOD needs to be cleared |
84 | * on IOP3XX to avoid data corruption on the bus. | 84 | * on IOP3XX to avoid data corruption on the bus. |
85 | */ | 85 | */ |
86 | #ifdef CONFIG_PLAT_IOP | 86 | #if defined(CONFIG_ARCH_IOP32X) || defined(CONFIG_ARCH_IOP33X) |
87 | if (iop3xx_adap->id == 0) { | 87 | if (iop3xx_adap->id == 0) { |
88 | gpio_line_set(IOP3XX_GPIO_LINE(7), GPIO_LOW); | 88 | gpio_line_set(IOP3XX_GPIO_LINE(7), GPIO_LOW); |
89 | gpio_line_set(IOP3XX_GPIO_LINE(6), GPIO_LOW); | 89 | gpio_line_set(IOP3XX_GPIO_LINE(6), GPIO_LOW); |
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index c3b1567c852a..14e83d0aac8c 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c | |||
@@ -34,6 +34,7 @@ | |||
34 | 34 | ||
35 | #include <asm/hardware.h> | 35 | #include <asm/hardware.h> |
36 | #include <asm/irq.h> | 36 | #include <asm/irq.h> |
37 | #include <asm/io.h> | ||
37 | #include <asm/arch/i2c.h> | 38 | #include <asm/arch/i2c.h> |
38 | #include <asm/arch/pxa-regs.h> | 39 | #include <asm/arch/pxa-regs.h> |
39 | 40 | ||
@@ -54,8 +55,21 @@ struct pxa_i2c { | |||
54 | unsigned int irqlogidx; | 55 | unsigned int irqlogidx; |
55 | u32 isrlog[32]; | 56 | u32 isrlog[32]; |
56 | u32 icrlog[32]; | 57 | u32 icrlog[32]; |
58 | |||
59 | void __iomem *reg_base; | ||
60 | |||
61 | unsigned long iobase; | ||
62 | unsigned long iosize; | ||
63 | |||
64 | int irq; | ||
57 | }; | 65 | }; |
58 | 66 | ||
67 | #define _IBMR(i2c) ((i2c)->reg_base + 0) | ||
68 | #define _IDBR(i2c) ((i2c)->reg_base + 8) | ||
69 | #define _ICR(i2c) ((i2c)->reg_base + 0x10) | ||
70 | #define _ISR(i2c) ((i2c)->reg_base + 0x18) | ||
71 | #define _ISAR(i2c) ((i2c)->reg_base + 0x20) | ||
72 | |||
59 | /* | 73 | /* |
60 | * I2C Slave mode address | 74 | * I2C Slave mode address |
61 | */ | 75 | */ |
@@ -130,7 +144,8 @@ static unsigned int i2c_debug = DEBUG; | |||
130 | 144 | ||
131 | static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname) | 145 | static void i2c_pxa_show_state(struct pxa_i2c *i2c, int lno, const char *fname) |
132 | { | 146 | { |
133 | dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno, ISR, ICR, IBMR); | 147 | dev_dbg(&i2c->adap.dev, "state:%s:%d: ISR=%08x, ICR=%08x, IBMR=%02x\n", fname, lno, |
148 | readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); | ||
134 | } | 149 | } |
135 | 150 | ||
136 | #define show_state(i2c) i2c_pxa_show_state(i2c, __LINE__, __FUNCTION__) | 151 | #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) | |||
153 | printk("i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n", | 168 | printk("i2c: msg_num: %d msg_idx: %d msg_ptr: %d\n", |
154 | i2c->msg_num, i2c->msg_idx, i2c->msg_ptr); | 169 | i2c->msg_num, i2c->msg_idx, i2c->msg_ptr); |
155 | printk("i2c: ICR: %08x ISR: %08x\n" | 170 | printk("i2c: ICR: %08x ISR: %08x\n" |
156 | "i2c: log: ", ICR, ISR); | 171 | "i2c: log: ", readl(_ICR(i2c)), readl(_ISR(i2c))); |
157 | for (i = 0; i < i2c->irqlogidx; i++) | 172 | for (i = 0; i < i2c->irqlogidx; i++) |
158 | printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]); | 173 | printk("[%08x:%08x] ", i2c->isrlog[i], i2c->icrlog[i]); |
159 | printk("\n"); | 174 | printk("\n"); |
@@ -161,7 +176,7 @@ static void i2c_pxa_scream_blue_murder(struct pxa_i2c *i2c, const char *why) | |||
161 | 176 | ||
162 | static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c) | 177 | static inline int i2c_pxa_is_slavemode(struct pxa_i2c *i2c) |
163 | { | 178 | { |
164 | return !(ICR & ICR_SCLE); | 179 | return !(readl(_ICR(i2c)) & ICR_SCLE); |
165 | } | 180 | } |
166 | 181 | ||
167 | static void i2c_pxa_abort(struct pxa_i2c *i2c) | 182 | static void i2c_pxa_abort(struct pxa_i2c *i2c) |
@@ -173,28 +188,29 @@ static void i2c_pxa_abort(struct pxa_i2c *i2c) | |||
173 | return; | 188 | return; |
174 | } | 189 | } |
175 | 190 | ||
176 | while (time_before(jiffies, timeout) && (IBMR & 0x1) == 0) { | 191 | while (time_before(jiffies, timeout) && (readl(_IBMR(i2c)) & 0x1) == 0) { |
177 | unsigned long icr = ICR; | 192 | unsigned long icr = readl(_ICR(i2c)); |
178 | 193 | ||
179 | icr &= ~ICR_START; | 194 | icr &= ~ICR_START; |
180 | icr |= ICR_ACKNAK | ICR_STOP | ICR_TB; | 195 | icr |= ICR_ACKNAK | ICR_STOP | ICR_TB; |
181 | 196 | ||
182 | ICR = icr; | 197 | writel(icr, _ICR(i2c)); |
183 | 198 | ||
184 | show_state(i2c); | 199 | show_state(i2c); |
185 | 200 | ||
186 | msleep(1); | 201 | msleep(1); |
187 | } | 202 | } |
188 | 203 | ||
189 | ICR &= ~(ICR_MA | ICR_START | ICR_STOP); | 204 | writel(readl(_ICR(i2c)) & ~(ICR_MA | ICR_START | ICR_STOP), |
205 | _ICR(i2c)); | ||
190 | } | 206 | } |
191 | 207 | ||
192 | static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c) | 208 | static int i2c_pxa_wait_bus_not_busy(struct pxa_i2c *i2c) |
193 | { | 209 | { |
194 | int timeout = DEF_TIMEOUT; | 210 | int timeout = DEF_TIMEOUT; |
195 | 211 | ||
196 | while (timeout-- && ISR & (ISR_IBB | ISR_UB)) { | 212 | while (timeout-- && readl(_ISR(i2c)) & (ISR_IBB | ISR_UB)) { |
197 | if ((ISR & ISR_SAD) != 0) | 213 | if ((readl(_ISR(i2c)) & ISR_SAD) != 0) |
198 | timeout += 4; | 214 | timeout += 4; |
199 | 215 | ||
200 | msleep(2); | 216 | msleep(2); |
@@ -214,9 +230,9 @@ static int i2c_pxa_wait_master(struct pxa_i2c *i2c) | |||
214 | while (time_before(jiffies, timeout)) { | 230 | while (time_before(jiffies, timeout)) { |
215 | if (i2c_debug > 1) | 231 | if (i2c_debug > 1) |
216 | dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", | 232 | dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", |
217 | __func__, (long)jiffies, ISR, ICR, IBMR); | 233 | __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); |
218 | 234 | ||
219 | if (ISR & ISR_SAD) { | 235 | if (readl(_ISR(i2c)) & ISR_SAD) { |
220 | if (i2c_debug > 0) | 236 | if (i2c_debug > 0) |
221 | dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__); | 237 | dev_dbg(&i2c->adap.dev, "%s: Slave detected\n", __func__); |
222 | goto out; | 238 | goto out; |
@@ -226,7 +242,7 @@ static int i2c_pxa_wait_master(struct pxa_i2c *i2c) | |||
226 | * quick check of the i2c lines themselves to ensure they've | 242 | * quick check of the i2c lines themselves to ensure they've |
227 | * gone high... | 243 | * gone high... |
228 | */ | 244 | */ |
229 | if ((ISR & (ISR_UB | ISR_IBB)) == 0 && IBMR == 3) { | 245 | if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) == 0 && readl(_IBMR(i2c)) == 3) { |
230 | if (i2c_debug > 0) | 246 | if (i2c_debug > 0) |
231 | dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); | 247 | dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); |
232 | return 1; | 248 | return 1; |
@@ -246,7 +262,7 @@ static int i2c_pxa_set_master(struct pxa_i2c *i2c) | |||
246 | if (i2c_debug) | 262 | if (i2c_debug) |
247 | dev_dbg(&i2c->adap.dev, "setting to bus master\n"); | 263 | dev_dbg(&i2c->adap.dev, "setting to bus master\n"); |
248 | 264 | ||
249 | if ((ISR & (ISR_UB | ISR_IBB)) != 0) { | 265 | if ((readl(_ISR(i2c)) & (ISR_UB | ISR_IBB)) != 0) { |
250 | dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__); | 266 | dev_dbg(&i2c->adap.dev, "%s: unit is busy\n", __func__); |
251 | if (!i2c_pxa_wait_master(i2c)) { | 267 | if (!i2c_pxa_wait_master(i2c)) { |
252 | dev_dbg(&i2c->adap.dev, "%s: error: unit busy\n", __func__); | 268 | 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) | |||
254 | } | 270 | } |
255 | } | 271 | } |
256 | 272 | ||
257 | ICR |= ICR_SCLE; | 273 | writel(readl(_ICR(i2c)) | ICR_SCLE, _ICR(i2c)); |
258 | return 0; | 274 | return 0; |
259 | } | 275 | } |
260 | 276 | ||
@@ -270,11 +286,11 @@ static int i2c_pxa_wait_slave(struct pxa_i2c *i2c) | |||
270 | while (time_before(jiffies, timeout)) { | 286 | while (time_before(jiffies, timeout)) { |
271 | if (i2c_debug > 1) | 287 | if (i2c_debug > 1) |
272 | dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", | 288 | dev_dbg(&i2c->adap.dev, "%s: %ld: ISR=%08x, ICR=%08x, IBMR=%02x\n", |
273 | __func__, (long)jiffies, ISR, ICR, IBMR); | 289 | __func__, (long)jiffies, readl(_ISR(i2c)), readl(_ICR(i2c)), readl(_IBMR(i2c))); |
274 | 290 | ||
275 | if ((ISR & (ISR_UB|ISR_IBB)) == 0 || | 291 | if ((readl(_ISR(i2c)) & (ISR_UB|ISR_IBB)) == 0 || |
276 | (ISR & ISR_SAD) != 0 || | 292 | (readl(_ISR(i2c)) & ISR_SAD) != 0 || |
277 | (ICR & ICR_SCLE) == 0) { | 293 | (readl(_ICR(i2c)) & ICR_SCLE) == 0) { |
278 | if (i2c_debug > 1) | 294 | if (i2c_debug > 1) |
279 | dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); | 295 | dev_dbg(&i2c->adap.dev, "%s: done\n", __func__); |
280 | return 1; | 296 | return 1; |
@@ -302,9 +318,9 @@ static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode) | |||
302 | /* we need to wait for the stop condition to end */ | 318 | /* we need to wait for the stop condition to end */ |
303 | 319 | ||
304 | /* if we where in stop, then clear... */ | 320 | /* if we where in stop, then clear... */ |
305 | if (ICR & ICR_STOP) { | 321 | if (readl(_ICR(i2c)) & ICR_STOP) { |
306 | udelay(100); | 322 | udelay(100); |
307 | ICR &= ~ICR_STOP; | 323 | writel(readl(_ICR(i2c)) & ~ICR_STOP, _ICR(i2c)); |
308 | } | 324 | } |
309 | 325 | ||
310 | if (!i2c_pxa_wait_slave(i2c)) { | 326 | if (!i2c_pxa_wait_slave(i2c)) { |
@@ -314,12 +330,12 @@ static void i2c_pxa_set_slave(struct pxa_i2c *i2c, int errcode) | |||
314 | } | 330 | } |
315 | } | 331 | } |
316 | 332 | ||
317 | ICR &= ~(ICR_STOP|ICR_ACKNAK|ICR_MA); | 333 | writel(readl(_ICR(i2c)) & ~(ICR_STOP|ICR_ACKNAK|ICR_MA), _ICR(i2c)); |
318 | ICR &= ~ICR_SCLE; | 334 | writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); |
319 | 335 | ||
320 | if (i2c_debug) { | 336 | if (i2c_debug) { |
321 | dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", ICR, ISR); | 337 | dev_dbg(&i2c->adap.dev, "ICR now %08x, ISR %08x\n", readl(_ICR(i2c)), readl(_ISR(i2c))); |
322 | decode_ICR(ICR); | 338 | decode_ICR(readl(_ICR(i2c))); |
323 | } | 339 | } |
324 | } | 340 | } |
325 | #else | 341 | #else |
@@ -334,24 +350,24 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c) | |||
334 | i2c_pxa_abort(i2c); | 350 | i2c_pxa_abort(i2c); |
335 | 351 | ||
336 | /* reset according to 9.8 */ | 352 | /* reset according to 9.8 */ |
337 | ICR = ICR_UR; | 353 | writel(ICR_UR, _ICR(i2c)); |
338 | ISR = I2C_ISR_INIT; | 354 | writel(I2C_ISR_INIT, _ISR(i2c)); |
339 | ICR &= ~ICR_UR; | 355 | writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c)); |
340 | 356 | ||
341 | ISAR = i2c->slave_addr; | 357 | writel(i2c->slave_addr, _ISAR(i2c)); |
342 | 358 | ||
343 | /* set control register values */ | 359 | /* set control register values */ |
344 | ICR = I2C_ICR_INIT; | 360 | writel(I2C_ICR_INIT, _ICR(i2c)); |
345 | 361 | ||
346 | #ifdef CONFIG_I2C_PXA_SLAVE | 362 | #ifdef CONFIG_I2C_PXA_SLAVE |
347 | dev_info(&i2c->adap.dev, "Enabling slave mode\n"); | 363 | dev_info(&i2c->adap.dev, "Enabling slave mode\n"); |
348 | ICR |= ICR_SADIE | ICR_ALDIE | ICR_SSDIE; | 364 | writel(readl(_ICR(i2c)) | ICR_SADIE | ICR_ALDIE | ICR_SSDIE, _ICR(i2c)); |
349 | #endif | 365 | #endif |
350 | 366 | ||
351 | i2c_pxa_set_slave(i2c, 0); | 367 | i2c_pxa_set_slave(i2c, 0); |
352 | 368 | ||
353 | /* enable unit */ | 369 | /* enable unit */ |
354 | ICR |= ICR_IUE; | 370 | writel(readl(_ICR(i2c)) | ICR_IUE, _ICR(i2c)); |
355 | udelay(100); | 371 | udelay(100); |
356 | } | 372 | } |
357 | 373 | ||
@@ -371,19 +387,19 @@ static void i2c_pxa_slave_txempty(struct pxa_i2c *i2c, u32 isr) | |||
371 | if (i2c->slave != NULL) | 387 | if (i2c->slave != NULL) |
372 | ret = i2c->slave->read(i2c->slave->data); | 388 | ret = i2c->slave->read(i2c->slave->data); |
373 | 389 | ||
374 | IDBR = ret; | 390 | writel(ret, _IDBR(i2c)); |
375 | ICR |= ICR_TB; /* allow next byte */ | 391 | writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); /* allow next byte */ |
376 | } | 392 | } |
377 | } | 393 | } |
378 | 394 | ||
379 | static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) | 395 | static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) |
380 | { | 396 | { |
381 | unsigned int byte = IDBR; | 397 | unsigned int byte = readl(_IDBR(i2c)); |
382 | 398 | ||
383 | if (i2c->slave != NULL) | 399 | if (i2c->slave != NULL) |
384 | i2c->slave->write(i2c->slave->data, byte); | 400 | i2c->slave->write(i2c->slave->data, byte); |
385 | 401 | ||
386 | ICR |= ICR_TB; | 402 | writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); |
387 | } | 403 | } |
388 | 404 | ||
389 | static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) | 405 | 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) | |||
403 | * start condition... if this happens, we'd better back off | 419 | * start condition... if this happens, we'd better back off |
404 | * and stop holding the poor thing up | 420 | * and stop holding the poor thing up |
405 | */ | 421 | */ |
406 | ICR &= ~(ICR_START|ICR_STOP); | 422 | writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); |
407 | ICR |= ICR_TB; | 423 | writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); |
408 | 424 | ||
409 | timeout = 0x10000; | 425 | timeout = 0x10000; |
410 | 426 | ||
411 | while (1) { | 427 | while (1) { |
412 | if ((IBMR & 2) == 2) | 428 | if ((readl(_IBMR(i2c)) & 2) == 2) |
413 | break; | 429 | break; |
414 | 430 | ||
415 | timeout--; | 431 | timeout--; |
@@ -420,7 +436,7 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) | |||
420 | } | 436 | } |
421 | } | 437 | } |
422 | 438 | ||
423 | ICR &= ~ICR_SCLE; | 439 | writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); |
424 | } | 440 | } |
425 | 441 | ||
426 | static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) | 442 | 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) | |||
447 | if (isr & ISR_BED) { | 463 | if (isr & ISR_BED) { |
448 | /* what should we do here? */ | 464 | /* what should we do here? */ |
449 | } else { | 465 | } else { |
450 | IDBR = 0; | 466 | writel(0, _IDBR(i2c)); |
451 | ICR |= ICR_TB; | 467 | writel(readl(_ICR(i2c)) | ICR_TB, _ICR(i2c)); |
452 | } | 468 | } |
453 | } | 469 | } |
454 | 470 | ||
455 | static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) | 471 | static void i2c_pxa_slave_rxfull(struct pxa_i2c *i2c, u32 isr) |
456 | { | 472 | { |
457 | ICR |= ICR_TB | ICR_ACKNAK; | 473 | writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); |
458 | } | 474 | } |
459 | 475 | ||
460 | static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) | 476 | 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) | |||
466 | * start condition... if this happens, we'd better back off | 482 | * start condition... if this happens, we'd better back off |
467 | * and stop holding the poor thing up | 483 | * and stop holding the poor thing up |
468 | */ | 484 | */ |
469 | ICR &= ~(ICR_START|ICR_STOP); | 485 | writel(readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP), _ICR(i2c)); |
470 | ICR |= ICR_TB | ICR_ACKNAK; | 486 | writel(readl(_ICR(i2c)) | ICR_TB | ICR_ACKNAK, _ICR(i2c)); |
471 | 487 | ||
472 | timeout = 0x10000; | 488 | timeout = 0x10000; |
473 | 489 | ||
474 | while (1) { | 490 | while (1) { |
475 | if ((IBMR & 2) == 2) | 491 | if ((readl(_IBMR(i2c)) & 2) == 2) |
476 | break; | 492 | break; |
477 | 493 | ||
478 | timeout--; | 494 | timeout--; |
@@ -483,7 +499,7 @@ static void i2c_pxa_slave_start(struct pxa_i2c *i2c, u32 isr) | |||
483 | } | 499 | } |
484 | } | 500 | } |
485 | 501 | ||
486 | ICR &= ~ICR_SCLE; | 502 | writel(readl(_ICR(i2c)) & ~ICR_SCLE, _ICR(i2c)); |
487 | } | 503 | } |
488 | 504 | ||
489 | static void i2c_pxa_slave_stop(struct pxa_i2c *i2c) | 505 | 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) | |||
514 | /* | 530 | /* |
515 | * Step 1: target slave address into IDBR | 531 | * Step 1: target slave address into IDBR |
516 | */ | 532 | */ |
517 | IDBR = i2c_pxa_addr_byte(i2c->msg); | 533 | writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); |
518 | 534 | ||
519 | /* | 535 | /* |
520 | * Step 2: initiate the write. | 536 | * Step 2: initiate the write. |
521 | */ | 537 | */ |
522 | icr = ICR & ~(ICR_STOP | ICR_ALDIE); | 538 | icr = readl(_ICR(i2c)) & ~(ICR_STOP | ICR_ALDIE); |
523 | ICR = icr | ICR_START | ICR_TB; | 539 | writel(icr | ICR_START | ICR_TB, _ICR(i2c)); |
524 | } | 540 | } |
525 | 541 | ||
526 | /* | 542 | /* |
@@ -594,7 +610,7 @@ static void i2c_pxa_master_complete(struct pxa_i2c *i2c, int ret) | |||
594 | 610 | ||
595 | static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) | 611 | static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) |
596 | { | 612 | { |
597 | u32 icr = ICR & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); | 613 | u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); |
598 | 614 | ||
599 | again: | 615 | again: |
600 | /* | 616 | /* |
@@ -645,7 +661,7 @@ static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) | |||
645 | /* | 661 | /* |
646 | * Write mode. Write the next data byte. | 662 | * Write mode. Write the next data byte. |
647 | */ | 663 | */ |
648 | IDBR = i2c->msg->buf[i2c->msg_ptr++]; | 664 | writel(i2c->msg->buf[i2c->msg_ptr++], _IDBR(i2c)); |
649 | 665 | ||
650 | icr |= ICR_ALDIE | ICR_TB; | 666 | icr |= ICR_ALDIE | ICR_TB; |
651 | 667 | ||
@@ -675,7 +691,7 @@ static void i2c_pxa_irq_txempty(struct pxa_i2c *i2c, u32 isr) | |||
675 | /* | 691 | /* |
676 | * Write the next address. | 692 | * Write the next address. |
677 | */ | 693 | */ |
678 | IDBR = i2c_pxa_addr_byte(i2c->msg); | 694 | writel(i2c_pxa_addr_byte(i2c->msg), _IDBR(i2c)); |
679 | 695 | ||
680 | /* | 696 | /* |
681 | * And trigger a repeated start, and send the byte. | 697 | * 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) | |||
696 | 712 | ||
697 | i2c->icrlog[i2c->irqlogidx-1] = icr; | 713 | i2c->icrlog[i2c->irqlogidx-1] = icr; |
698 | 714 | ||
699 | ICR = icr; | 715 | writel(icr, _ICR(i2c)); |
700 | show_state(i2c); | 716 | show_state(i2c); |
701 | } | 717 | } |
702 | 718 | ||
703 | static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) | 719 | static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) |
704 | { | 720 | { |
705 | u32 icr = ICR & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); | 721 | u32 icr = readl(_ICR(i2c)) & ~(ICR_START|ICR_STOP|ICR_ACKNAK|ICR_TB); |
706 | 722 | ||
707 | /* | 723 | /* |
708 | * Read the byte. | 724 | * Read the byte. |
709 | */ | 725 | */ |
710 | i2c->msg->buf[i2c->msg_ptr++] = IDBR; | 726 | i2c->msg->buf[i2c->msg_ptr++] = readl(_IDBR(i2c)); |
711 | 727 | ||
712 | if (i2c->msg_ptr < i2c->msg->len) { | 728 | if (i2c->msg_ptr < i2c->msg->len) { |
713 | /* | 729 | /* |
@@ -724,17 +740,17 @@ static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr) | |||
724 | 740 | ||
725 | i2c->icrlog[i2c->irqlogidx-1] = icr; | 741 | i2c->icrlog[i2c->irqlogidx-1] = icr; |
726 | 742 | ||
727 | ICR = icr; | 743 | writel(icr, _ICR(i2c)); |
728 | } | 744 | } |
729 | 745 | ||
730 | static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id) | 746 | static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id) |
731 | { | 747 | { |
732 | struct pxa_i2c *i2c = dev_id; | 748 | struct pxa_i2c *i2c = dev_id; |
733 | u32 isr = ISR; | 749 | u32 isr = readl(_ISR(i2c)); |
734 | 750 | ||
735 | if (i2c_debug > 2 && 0) { | 751 | if (i2c_debug > 2 && 0) { |
736 | dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n", | 752 | dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n", |
737 | __func__, isr, ICR, IBMR); | 753 | __func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c))); |
738 | decode_ISR(isr); | 754 | decode_ISR(isr); |
739 | } | 755 | } |
740 | 756 | ||
@@ -746,7 +762,7 @@ static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id) | |||
746 | /* | 762 | /* |
747 | * Always clear all pending IRQs. | 763 | * Always clear all pending IRQs. |
748 | */ | 764 | */ |
749 | ISR = isr & (ISR_SSD|ISR_ALD|ISR_ITE|ISR_IRF|ISR_SAD|ISR_BED); | 765 | writel(isr & (ISR_SSD|ISR_ALD|ISR_ITE|ISR_IRF|ISR_SAD|ISR_BED), _ISR(i2c)); |
750 | 766 | ||
751 | if (isr & ISR_SAD) | 767 | if (isr & ISR_SAD) |
752 | i2c_pxa_slave_start(i2c, isr); | 768 | 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 | |||
779 | /* If the I2C controller is disabled we need to reset it (probably due | 795 | /* If the I2C controller is disabled we need to reset it (probably due |
780 | to a suspend/resume destroying state). We do this here as we can then | 796 | to a suspend/resume destroying state). We do this here as we can then |
781 | avoid worrying about resuming the controller before its users. */ | 797 | avoid worrying about resuming the controller before its users. */ |
782 | if (!(ICR & ICR_IUE)) | 798 | if (!(readl(_ICR(i2c)) & ICR_IUE)) |
783 | i2c_pxa_reset(i2c); | 799 | i2c_pxa_reset(i2c); |
784 | 800 | ||
785 | for (i = adap->retries; i >= 0; i--) { | 801 | for (i = adap->retries; i >= 0; i--) { |
@@ -810,28 +826,53 @@ static const struct i2c_algorithm i2c_pxa_algorithm = { | |||
810 | 826 | ||
811 | static struct pxa_i2c i2c_pxa = { | 827 | static struct pxa_i2c i2c_pxa = { |
812 | .lock = SPIN_LOCK_UNLOCKED, | 828 | .lock = SPIN_LOCK_UNLOCKED, |
813 | .wait = __WAIT_QUEUE_HEAD_INITIALIZER(i2c_pxa.wait), | ||
814 | .adap = { | 829 | .adap = { |
815 | .owner = THIS_MODULE, | 830 | .owner = THIS_MODULE, |
816 | .algo = &i2c_pxa_algorithm, | 831 | .algo = &i2c_pxa_algorithm, |
817 | .name = "pxa2xx-i2c", | 832 | .name = "pxa2xx-i2c.0", |
818 | .retries = 5, | 833 | .retries = 5, |
819 | }, | 834 | }, |
820 | }; | 835 | }; |
821 | 836 | ||
837 | #define res_len(r) ((r)->end - (r)->start + 1) | ||
822 | static int i2c_pxa_probe(struct platform_device *dev) | 838 | static int i2c_pxa_probe(struct platform_device *dev) |
823 | { | 839 | { |
824 | struct pxa_i2c *i2c = &i2c_pxa; | 840 | struct pxa_i2c *i2c = &i2c_pxa; |
841 | struct resource *res; | ||
825 | #ifdef CONFIG_I2C_PXA_SLAVE | 842 | #ifdef CONFIG_I2C_PXA_SLAVE |
826 | struct i2c_pxa_platform_data *plat = dev->dev.platform_data; | 843 | struct i2c_pxa_platform_data *plat = dev->dev.platform_data; |
827 | #endif | 844 | #endif |
828 | int ret; | 845 | int ret; |
846 | int irq; | ||
829 | 847 | ||
830 | #ifdef CONFIG_PXA27x | 848 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
831 | pxa_gpio_mode(GPIO117_I2CSCL_MD); | 849 | irq = platform_get_irq(dev, 0); |
832 | pxa_gpio_mode(GPIO118_I2CSDA_MD); | 850 | if (res == NULL || irq < 0) |
833 | udelay(100); | 851 | return -ENODEV; |
834 | #endif | 852 | |
853 | if (!request_mem_region(res->start, res_len(res), res->name)) | ||
854 | return -ENOMEM; | ||
855 | |||
856 | i2c = kmalloc(sizeof(struct pxa_i2c), GFP_KERNEL); | ||
857 | if (!i2c) { | ||
858 | ret = -ENOMEM; | ||
859 | goto emalloc; | ||
860 | } | ||
861 | |||
862 | memcpy(i2c, &i2c_pxa, sizeof(struct pxa_i2c)); | ||
863 | init_waitqueue_head(&i2c->wait); | ||
864 | i2c->adap.name[strlen(i2c->adap.name) - 1] = '0' + dev->id % 10; | ||
865 | |||
866 | i2c->reg_base = ioremap(res->start, res_len(res)); | ||
867 | if (!i2c->reg_base) { | ||
868 | ret = -EIO; | ||
869 | goto eremap; | ||
870 | } | ||
871 | |||
872 | i2c->iobase = res->start; | ||
873 | i2c->iosize = res_len(res); | ||
874 | |||
875 | i2c->irq = irq; | ||
835 | 876 | ||
836 | i2c->slave_addr = I2C_PXA_SLAVE_ADDR; | 877 | i2c->slave_addr = I2C_PXA_SLAVE_ADDR; |
837 | 878 | ||
@@ -842,11 +883,28 @@ static int i2c_pxa_probe(struct platform_device *dev) | |||
842 | } | 883 | } |
843 | #endif | 884 | #endif |
844 | 885 | ||
845 | pxa_set_cken(CKEN14_I2C, 1); | 886 | switch (dev->id) { |
846 | ret = request_irq(IRQ_I2C, i2c_pxa_handler, IRQF_DISABLED, | 887 | case 0: |
847 | "pxa2xx-i2c", i2c); | 888 | #ifdef CONFIG_PXA27x |
889 | pxa_gpio_mode(GPIO117_I2CSCL_MD); | ||
890 | pxa_gpio_mode(GPIO118_I2CSDA_MD); | ||
891 | #endif | ||
892 | pxa_set_cken(CKEN14_I2C, 1); | ||
893 | break; | ||
894 | #ifdef CONFIG_PXA27x | ||
895 | case 1: | ||
896 | local_irq_disable(); | ||
897 | PCFR |= PCFR_PI2CEN; | ||
898 | local_irq_enable(); | ||
899 | pxa_set_cken(CKEN15_PWRI2C, 1); | ||
900 | #endif | ||
901 | } | ||
902 | |||
903 | ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED, | ||
904 | i2c->adap.name, i2c); | ||
848 | if (ret) | 905 | if (ret) |
849 | goto out; | 906 | goto ereqirq; |
907 | |||
850 | 908 | ||
851 | i2c_pxa_reset(i2c); | 909 | i2c_pxa_reset(i2c); |
852 | 910 | ||
@@ -856,7 +914,7 @@ static int i2c_pxa_probe(struct platform_device *dev) | |||
856 | ret = i2c_add_adapter(&i2c->adap); | 914 | ret = i2c_add_adapter(&i2c->adap); |
857 | if (ret < 0) { | 915 | if (ret < 0) { |
858 | printk(KERN_INFO "I2C: Failed to add bus\n"); | 916 | printk(KERN_INFO "I2C: Failed to add bus\n"); |
859 | goto err_irq; | 917 | goto eadapt; |
860 | } | 918 | } |
861 | 919 | ||
862 | platform_set_drvdata(dev, i2c); | 920 | platform_set_drvdata(dev, i2c); |
@@ -870,9 +928,25 @@ static int i2c_pxa_probe(struct platform_device *dev) | |||
870 | #endif | 928 | #endif |
871 | return 0; | 929 | return 0; |
872 | 930 | ||
873 | err_irq: | 931 | eadapt: |
874 | free_irq(IRQ_I2C, i2c); | 932 | free_irq(irq, i2c); |
875 | out: | 933 | ereqirq: |
934 | switch (dev->id) { | ||
935 | case 0: | ||
936 | pxa_set_cken(CKEN14_I2C, 0); | ||
937 | break; | ||
938 | #ifdef CONFIG_PXA27x | ||
939 | case 1: | ||
940 | pxa_set_cken(CKEN15_PWRI2C, 0); | ||
941 | local_irq_disable(); | ||
942 | PCFR &= ~PCFR_PI2CEN; | ||
943 | local_irq_enable(); | ||
944 | #endif | ||
945 | } | ||
946 | eremap: | ||
947 | kfree(i2c); | ||
948 | emalloc: | ||
949 | release_mem_region(res->start, res_len(res)); | ||
876 | return ret; | 950 | return ret; |
877 | } | 951 | } |
878 | 952 | ||
@@ -883,8 +957,21 @@ static int i2c_pxa_remove(struct platform_device *dev) | |||
883 | platform_set_drvdata(dev, NULL); | 957 | platform_set_drvdata(dev, NULL); |
884 | 958 | ||
885 | i2c_del_adapter(&i2c->adap); | 959 | i2c_del_adapter(&i2c->adap); |
886 | free_irq(IRQ_I2C, i2c); | 960 | free_irq(i2c->irq, i2c); |
887 | pxa_set_cken(CKEN14_I2C, 0); | 961 | switch (dev->id) { |
962 | case 0: | ||
963 | pxa_set_cken(CKEN14_I2C, 0); | ||
964 | break; | ||
965 | #ifdef CONFIG_PXA27x | ||
966 | case 1: | ||
967 | pxa_set_cken(CKEN15_PWRI2C, 0); | ||
968 | local_irq_disable(); | ||
969 | PCFR &= ~PCFR_PI2CEN; | ||
970 | local_irq_enable(); | ||
971 | #endif | ||
972 | } | ||
973 | release_mem_region(i2c->iobase, i2c->iosize); | ||
974 | kfree(i2c); | ||
888 | 975 | ||
889 | return 0; | 976 | return 0; |
890 | } | 977 | } |