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Ben Dooksb6d64542007-02-20 13:58:01 -08001/* linux/drivers/mfd/sm501.c
2 *
3 * Copyright (C) 2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 * Vincent Sanders <vince@simtec.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * SM501 MFD driver
12*/
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/init.h>
18#include <linux/list.h>
19#include <linux/device.h>
20#include <linux/platform_device.h>
21#include <linux/pci.h>
Ben Dooks42cd2362008-07-25 01:46:01 -070022#include <linux/i2c-gpio.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Ben Dooksb6d64542007-02-20 13:58:01 -080024
25#include <linux/sm501.h>
26#include <linux/sm501-regs.h>
Magnus Damm61711f82008-04-28 02:14:22 -070027#include <linux/serial_8250.h>
Ben Dooksb6d64542007-02-20 13:58:01 -080028
Axel Linf77401d2010-11-10 15:47:51 +080029#include <linux/io.h>
Ben Dooksb6d64542007-02-20 13:58:01 -080030
31struct sm501_device {
32 struct list_head list;
33 struct platform_device pdev;
34};
35
Ben Dooksf61be272008-07-25 01:45:59 -070036struct sm501_gpio;
37
Ben Dooksf2999202008-07-25 01:46:02 -070038#ifdef CONFIG_MFD_SM501_GPIO
39#include <linux/gpio.h>
40
Ben Dooksf61be272008-07-25 01:45:59 -070041struct sm501_gpio_chip {
42 struct gpio_chip gpio;
43 struct sm501_gpio *ourgpio; /* to get back to parent. */
44 void __iomem *regbase;
Ben Dooks98325f82009-01-10 16:59:53 +010045 void __iomem *control; /* address of control reg. */
Ben Dooksf61be272008-07-25 01:45:59 -070046};
47
48struct sm501_gpio {
49 struct sm501_gpio_chip low;
50 struct sm501_gpio_chip high;
51 spinlock_t lock;
52
53 unsigned int registered : 1;
54 void __iomem *regs;
55 struct resource *regs_res;
56};
Ben Dooksf2999202008-07-25 01:46:02 -070057#else
58struct sm501_gpio {
59 /* no gpio support, empty definition for sm501_devdata. */
60};
61#endif
Ben Dooksf61be272008-07-25 01:45:59 -070062
Ben Dooksb6d64542007-02-20 13:58:01 -080063struct sm501_devdata {
64 spinlock_t reg_lock;
65 struct mutex clock_lock;
66 struct list_head devices;
Ben Dooksf61be272008-07-25 01:45:59 -070067 struct sm501_gpio gpio;
Ben Dooksb6d64542007-02-20 13:58:01 -080068
69 struct device *dev;
70 struct resource *io_res;
71 struct resource *mem_res;
72 struct resource *regs_claim;
73 struct sm501_platdata *platdata;
74
Ben Dooksf61be272008-07-25 01:45:59 -070075
Ben Dooks331d7472007-06-23 17:16:28 -070076 unsigned int in_suspend;
77 unsigned long pm_misc;
78
Ben Dooksb6d64542007-02-20 13:58:01 -080079 int unit_power[20];
80 unsigned int pdev_id;
81 unsigned int irq;
82 void __iomem *regs;
Ville Syrjala3149be52008-03-04 14:28:50 -080083 unsigned int rev;
Ben Dooksb6d64542007-02-20 13:58:01 -080084};
85
Ben Dooksf61be272008-07-25 01:45:59 -070086
Ben Dooksb6d64542007-02-20 13:58:01 -080087#define MHZ (1000 * 1000)
88
89#ifdef DEBUG
Ville Syrjala245904a2008-03-04 14:28:49 -080090static const unsigned int div_tab[] = {
Ben Dooksb6d64542007-02-20 13:58:01 -080091 [0] = 1,
92 [1] = 2,
93 [2] = 4,
94 [3] = 8,
95 [4] = 16,
96 [5] = 32,
97 [6] = 64,
98 [7] = 128,
99 [8] = 3,
100 [9] = 6,
101 [10] = 12,
102 [11] = 24,
103 [12] = 48,
104 [13] = 96,
105 [14] = 192,
106 [15] = 384,
107 [16] = 5,
108 [17] = 10,
109 [18] = 20,
110 [19] = 40,
111 [20] = 80,
112 [21] = 160,
113 [22] = 320,
114 [23] = 604,
115};
116
117static unsigned long decode_div(unsigned long pll2, unsigned long val,
118 unsigned int lshft, unsigned int selbit,
Ville Syrjala245904a2008-03-04 14:28:49 -0800119 unsigned long mask)
Ben Dooksb6d64542007-02-20 13:58:01 -0800120{
121 if (val & selbit)
122 pll2 = 288 * MHZ;
123
Ville Syrjala245904a2008-03-04 14:28:49 -0800124 return pll2 / div_tab[(val >> lshft) & mask];
Ben Dooksb6d64542007-02-20 13:58:01 -0800125}
126
127#define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x)
128
129/* sm501_dump_clk
130 *
131 * Print out the current clock configuration for the device
132*/
133
134static void sm501_dump_clk(struct sm501_devdata *sm)
135{
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000136 unsigned long misct = smc501_readl(sm->regs + SM501_MISC_TIMING);
137 unsigned long pm0 = smc501_readl(sm->regs + SM501_POWER_MODE_0_CLOCK);
138 unsigned long pm1 = smc501_readl(sm->regs + SM501_POWER_MODE_1_CLOCK);
139 unsigned long pmc = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
Ben Dooksb6d64542007-02-20 13:58:01 -0800140 unsigned long sdclk0, sdclk1;
141 unsigned long pll2 = 0;
142
143 switch (misct & 0x30) {
144 case 0x00:
145 pll2 = 336 * MHZ;
146 break;
147 case 0x10:
148 pll2 = 288 * MHZ;
149 break;
150 case 0x20:
151 pll2 = 240 * MHZ;
152 break;
153 case 0x30:
154 pll2 = 192 * MHZ;
155 break;
156 }
157
158 sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ;
Ville Syrjala245904a2008-03-04 14:28:49 -0800159 sdclk0 /= div_tab[((misct >> 8) & 0xf)];
Ben Dooksb6d64542007-02-20 13:58:01 -0800160
161 sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ;
Ville Syrjala245904a2008-03-04 14:28:49 -0800162 sdclk1 /= div_tab[((misct >> 16) & 0xf)];
Ben Dooksb6d64542007-02-20 13:58:01 -0800163
164 dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n",
165 misct, pm0, pm1);
166
167 dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n",
168 fmt_freq(pll2), sdclk0, sdclk1);
169
170 dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1);
171
172 dev_dbg(sm->dev, "PM0[%c]: "
173 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
Ben Dooks48986f02007-11-28 16:21:37 -0800174 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
Ben Dooksb6d64542007-02-20 13:58:01 -0800175 (pmc & 3 ) == 0 ? '*' : '-',
Ville Syrjala245904a2008-03-04 14:28:49 -0800176 fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)),
177 fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)),
178 fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)),
179 fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15)));
Ben Dooksb6d64542007-02-20 13:58:01 -0800180
181 dev_dbg(sm->dev, "PM1[%c]: "
182 "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
183 "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
184 (pmc & 3 ) == 1 ? '*' : '-',
Ville Syrjala245904a2008-03-04 14:28:49 -0800185 fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)),
186 fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)),
187 fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)),
188 fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15)));
Ben Dooksb6d64542007-02-20 13:58:01 -0800189}
Ben Dooks331d7472007-06-23 17:16:28 -0700190
191static void sm501_dump_regs(struct sm501_devdata *sm)
Ben Dooksb6d64542007-02-20 13:58:01 -0800192{
Ben Dooks331d7472007-06-23 17:16:28 -0700193 void __iomem *regs = sm->regs;
194
195 dev_info(sm->dev, "System Control %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000196 smc501_readl(regs + SM501_SYSTEM_CONTROL));
Ben Dooks331d7472007-06-23 17:16:28 -0700197 dev_info(sm->dev, "Misc Control %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000198 smc501_readl(regs + SM501_MISC_CONTROL));
Ben Dooks331d7472007-06-23 17:16:28 -0700199 dev_info(sm->dev, "GPIO Control Low %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000200 smc501_readl(regs + SM501_GPIO31_0_CONTROL));
Ben Dooks331d7472007-06-23 17:16:28 -0700201 dev_info(sm->dev, "GPIO Control Hi %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000202 smc501_readl(regs + SM501_GPIO63_32_CONTROL));
Ben Dooks331d7472007-06-23 17:16:28 -0700203 dev_info(sm->dev, "DRAM Control %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000204 smc501_readl(regs + SM501_DRAM_CONTROL));
Ben Dooks331d7472007-06-23 17:16:28 -0700205 dev_info(sm->dev, "Arbitration Ctrl %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000206 smc501_readl(regs + SM501_ARBTRTN_CONTROL));
Ben Dooks331d7472007-06-23 17:16:28 -0700207 dev_info(sm->dev, "Misc Timing %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000208 smc501_readl(regs + SM501_MISC_TIMING));
Ben Dooksb6d64542007-02-20 13:58:01 -0800209}
Ben Dooks331d7472007-06-23 17:16:28 -0700210
211static void sm501_dump_gate(struct sm501_devdata *sm)
212{
213 dev_info(sm->dev, "CurrentGate %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000214 smc501_readl(sm->regs + SM501_CURRENT_GATE));
Ben Dooks331d7472007-06-23 17:16:28 -0700215 dev_info(sm->dev, "CurrentClock %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000216 smc501_readl(sm->regs + SM501_CURRENT_CLOCK));
Ben Dooks331d7472007-06-23 17:16:28 -0700217 dev_info(sm->dev, "PowerModeControl %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000218 smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL));
Ben Dooks331d7472007-06-23 17:16:28 -0700219}
220
221#else
222static inline void sm501_dump_gate(struct sm501_devdata *sm) { }
223static inline void sm501_dump_regs(struct sm501_devdata *sm) { }
224static inline void sm501_dump_clk(struct sm501_devdata *sm) { }
Ben Dooksb6d64542007-02-20 13:58:01 -0800225#endif
226
227/* sm501_sync_regs
228 *
229 * ensure the
230*/
231
232static void sm501_sync_regs(struct sm501_devdata *sm)
233{
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000234 smc501_readl(sm->regs);
Ben Dooksb6d64542007-02-20 13:58:01 -0800235}
236
Ben Dooks331d7472007-06-23 17:16:28 -0700237static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay)
238{
239 /* during suspend/resume, we are currently not allowed to sleep,
240 * so change to using mdelay() instead of msleep() if we
241 * are in one of these paths */
242
243 if (sm->in_suspend)
244 mdelay(delay);
245 else
246 msleep(delay);
247}
248
Ben Dooksb6d64542007-02-20 13:58:01 -0800249/* sm501_misc_control
250 *
Ben Dooks331d7472007-06-23 17:16:28 -0700251 * alters the miscellaneous control parameters
Ben Dooksb6d64542007-02-20 13:58:01 -0800252*/
253
254int sm501_misc_control(struct device *dev,
255 unsigned long set, unsigned long clear)
256{
257 struct sm501_devdata *sm = dev_get_drvdata(dev);
258 unsigned long misc;
259 unsigned long save;
260 unsigned long to;
261
262 spin_lock_irqsave(&sm->reg_lock, save);
263
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000264 misc = smc501_readl(sm->regs + SM501_MISC_CONTROL);
Ben Dooksb6d64542007-02-20 13:58:01 -0800265 to = (misc & ~clear) | set;
266
267 if (to != misc) {
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000268 smc501_writel(to, sm->regs + SM501_MISC_CONTROL);
Ben Dooksb6d64542007-02-20 13:58:01 -0800269 sm501_sync_regs(sm);
270
271 dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc);
272 }
273
274 spin_unlock_irqrestore(&sm->reg_lock, save);
275 return to;
276}
277
278EXPORT_SYMBOL_GPL(sm501_misc_control);
279
280/* sm501_modify_reg
281 *
282 * Modify a register in the SM501 which may be shared with other
283 * drivers.
284*/
285
286unsigned long sm501_modify_reg(struct device *dev,
287 unsigned long reg,
288 unsigned long set,
289 unsigned long clear)
290{
291 struct sm501_devdata *sm = dev_get_drvdata(dev);
292 unsigned long data;
293 unsigned long save;
294
295 spin_lock_irqsave(&sm->reg_lock, save);
296
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000297 data = smc501_readl(sm->regs + reg);
Ben Dooksb6d64542007-02-20 13:58:01 -0800298 data |= set;
299 data &= ~clear;
300
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000301 smc501_writel(data, sm->regs + reg);
Ben Dooksb6d64542007-02-20 13:58:01 -0800302 sm501_sync_regs(sm);
303
304 spin_unlock_irqrestore(&sm->reg_lock, save);
305
306 return data;
307}
308
309EXPORT_SYMBOL_GPL(sm501_modify_reg);
310
Ben Dooksb6d64542007-02-20 13:58:01 -0800311/* sm501_unit_power
312 *
313 * alters the power active gate to set specific units on or off
314 */
315
316int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
317{
318 struct sm501_devdata *sm = dev_get_drvdata(dev);
319 unsigned long mode;
320 unsigned long gate;
321 unsigned long clock;
322
323 mutex_lock(&sm->clock_lock);
324
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000325 mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
326 gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
327 clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
Ben Dooksb6d64542007-02-20 13:58:01 -0800328
329 mode &= 3; /* get current power mode */
330
Adrian Bunkbf703c32007-04-01 23:49:38 -0700331 if (unit >= ARRAY_SIZE(sm->unit_power)) {
Harvey Harrison145980a2008-04-30 00:54:57 -0700332 dev_err(dev, "%s: bad unit %d\n", __func__, unit);
Ben Dooksb6d64542007-02-20 13:58:01 -0800333 goto already;
334 }
335
Harvey Harrison145980a2008-04-30 00:54:57 -0700336 dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit,
Ben Dooksb6d64542007-02-20 13:58:01 -0800337 sm->unit_power[unit], to);
338
339 if (to == 0 && sm->unit_power[unit] == 0) {
340 dev_err(sm->dev, "unit %d is already shutdown\n", unit);
341 goto already;
342 }
343
344 sm->unit_power[unit] += to ? 1 : -1;
345 to = sm->unit_power[unit] ? 1 : 0;
346
347 if (to) {
348 if (gate & (1 << unit))
349 goto already;
350 gate |= (1 << unit);
351 } else {
352 if (!(gate & (1 << unit)))
353 goto already;
354 gate &= ~(1 << unit);
355 }
356
357 switch (mode) {
358 case 1:
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000359 smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
360 smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
Ben Dooksb6d64542007-02-20 13:58:01 -0800361 mode = 0;
362 break;
363 case 2:
364 case 0:
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000365 smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
366 smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
Ben Dooksb6d64542007-02-20 13:58:01 -0800367 mode = 1;
368 break;
369
370 default:
Jiri Slaby992bb252009-06-22 00:00:02 +0200371 gate = -1;
372 goto already;
Ben Dooksb6d64542007-02-20 13:58:01 -0800373 }
374
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000375 smc501_writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
Ben Dooksb6d64542007-02-20 13:58:01 -0800376 sm501_sync_regs(sm);
377
378 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
379 gate, clock, mode);
380
Ben Dooks331d7472007-06-23 17:16:28 -0700381 sm501_mdelay(sm, 16);
Ben Dooksb6d64542007-02-20 13:58:01 -0800382
383 already:
384 mutex_unlock(&sm->clock_lock);
385 return gate;
386}
387
388EXPORT_SYMBOL_GPL(sm501_unit_power);
389
Ben Dooksb6d64542007-02-20 13:58:01 -0800390/* clock value structure. */
391struct sm501_clock {
392 unsigned long mclk;
393 int divider;
394 int shift;
Ville Syrjala3149be52008-03-04 14:28:50 -0800395 unsigned int m, n, k;
Ben Dooksb6d64542007-02-20 13:58:01 -0800396};
397
Ville Syrjala3149be52008-03-04 14:28:50 -0800398/* sm501_calc_clock
399 *
400 * Calculates the nearest discrete clock frequency that
401 * can be achieved with the specified input clock.
402 * the maximum divisor is 3 or 5
403 */
404
405static int sm501_calc_clock(unsigned long freq,
406 struct sm501_clock *clock,
407 int max_div,
408 unsigned long mclk,
409 long *best_diff)
410{
411 int ret = 0;
412 int divider;
413 int shift;
414 long diff;
415
416 /* try dividers 1 and 3 for CRT and for panel,
417 try divider 5 for panel only.*/
418
419 for (divider = 1; divider <= max_div; divider += 2) {
420 /* try all 8 shift values.*/
421 for (shift = 0; shift < 8; shift++) {
422 /* Calculate difference to requested clock */
Axel Lin829ecbc2012-03-12 10:12:34 +0800423 diff = DIV_ROUND_CLOSEST(mclk, divider << shift) - freq;
Ville Syrjala3149be52008-03-04 14:28:50 -0800424 if (diff < 0)
425 diff = -diff;
426
427 /* If it is less than the current, use it */
428 if (diff < *best_diff) {
429 *best_diff = diff;
430
431 clock->mclk = mclk;
432 clock->divider = divider;
433 clock->shift = shift;
434 ret = 1;
435 }
436 }
437 }
438
439 return ret;
440}
441
442/* sm501_calc_pll
443 *
444 * Calculates the nearest discrete clock frequency that can be
445 * achieved using the programmable PLL.
446 * the maximum divisor is 3 or 5
447 */
448
449static unsigned long sm501_calc_pll(unsigned long freq,
450 struct sm501_clock *clock,
451 int max_div)
452{
453 unsigned long mclk;
454 unsigned int m, n, k;
455 long best_diff = 999999999;
456
457 /*
458 * The SM502 datasheet doesn't specify the min/max values for M and N.
459 * N = 1 at least doesn't work in practice.
460 */
461 for (m = 2; m <= 255; m++) {
462 for (n = 2; n <= 127; n++) {
463 for (k = 0; k <= 1; k++) {
464 mclk = (24000000UL * m / n) >> k;
465
466 if (sm501_calc_clock(freq, clock, max_div,
467 mclk, &best_diff)) {
468 clock->m = m;
469 clock->n = n;
470 clock->k = k;
471 }
472 }
473 }
474 }
475
476 /* Return best clock. */
477 return clock->mclk / (clock->divider << clock->shift);
478}
479
Ben Dooksb6d64542007-02-20 13:58:01 -0800480/* sm501_select_clock
481 *
Ville Syrjala3149be52008-03-04 14:28:50 -0800482 * Calculates the nearest discrete clock frequency that can be
483 * achieved using the 288MHz and 336MHz PLLs.
Ben Dooksb6d64542007-02-20 13:58:01 -0800484 * the maximum divisor is 3 or 5
485 */
Ville Syrjala3149be52008-03-04 14:28:50 -0800486
Ben Dooksb6d64542007-02-20 13:58:01 -0800487static unsigned long sm501_select_clock(unsigned long freq,
488 struct sm501_clock *clock,
489 int max_div)
490{
491 unsigned long mclk;
Ben Dooksb6d64542007-02-20 13:58:01 -0800492 long best_diff = 999999999;
493
494 /* Try 288MHz and 336MHz clocks. */
495 for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) {
Ville Syrjala3149be52008-03-04 14:28:50 -0800496 sm501_calc_clock(freq, clock, max_div, mclk, &best_diff);
Ben Dooksb6d64542007-02-20 13:58:01 -0800497 }
498
499 /* Return best clock. */
500 return clock->mclk / (clock->divider << clock->shift);
501}
502
503/* sm501_set_clock
504 *
505 * set one of the four clock sources to the closest available frequency to
506 * the one specified
507*/
508
509unsigned long sm501_set_clock(struct device *dev,
510 int clksrc,
511 unsigned long req_freq)
512{
513 struct sm501_devdata *sm = dev_get_drvdata(dev);
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000514 unsigned long mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
515 unsigned long gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
516 unsigned long clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
Ben Dooksb6d64542007-02-20 13:58:01 -0800517 unsigned char reg;
Ville Syrjala3149be52008-03-04 14:28:50 -0800518 unsigned int pll_reg = 0;
Daniel Mack3ad2f3f2010-02-03 08:01:28 +0800519 unsigned long sm501_freq; /* the actual frequency achieved */
Ben Dooksb6d64542007-02-20 13:58:01 -0800520
521 struct sm501_clock to;
522
523 /* find achivable discrete frequency and setup register value
524 * accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK
525 * has an extra bit for the divider */
526
527 switch (clksrc) {
528 case SM501_CLOCK_P2XCLK:
Daniel Mack3ad2f3f2010-02-03 08:01:28 +0800529 /* This clock is divided in half so to achieve the
Ben Dooksb6d64542007-02-20 13:58:01 -0800530 * requested frequency the value must be multiplied by
531 * 2. This clock also has an additional pre divisor */
532
Ville Syrjala3149be52008-03-04 14:28:50 -0800533 if (sm->rev >= 0xC0) {
534 /* SM502 -> use the programmable PLL */
535 sm501_freq = (sm501_calc_pll(2 * req_freq,
536 &to, 5) / 2);
537 reg = to.shift & 0x07;/* bottom 3 bits are shift */
538 if (to.divider == 3)
539 reg |= 0x08; /* /3 divider required */
540 else if (to.divider == 5)
541 reg |= 0x10; /* /5 divider required */
542 reg |= 0x40; /* select the programmable PLL */
543 pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m;
544 } else {
545 sm501_freq = (sm501_select_clock(2 * req_freq,
546 &to, 5) / 2);
547 reg = to.shift & 0x07;/* bottom 3 bits are shift */
548 if (to.divider == 3)
549 reg |= 0x08; /* /3 divider required */
550 else if (to.divider == 5)
551 reg |= 0x10; /* /5 divider required */
552 if (to.mclk != 288000000)
553 reg |= 0x20; /* which mclk pll is source */
554 }
Ben Dooksb6d64542007-02-20 13:58:01 -0800555 break;
556
557 case SM501_CLOCK_V2XCLK:
Daniel Mack3ad2f3f2010-02-03 08:01:28 +0800558 /* This clock is divided in half so to achieve the
Ben Dooksb6d64542007-02-20 13:58:01 -0800559 * requested frequency the value must be multiplied by 2. */
560
561 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
562 reg=to.shift & 0x07; /* bottom 3 bits are shift */
563 if (to.divider == 3)
564 reg |= 0x08; /* /3 divider required */
565 if (to.mclk != 288000000)
566 reg |= 0x10; /* which mclk pll is source */
567 break;
568
569 case SM501_CLOCK_MCLK:
570 case SM501_CLOCK_M1XCLK:
571 /* These clocks are the same and not further divided */
572
573 sm501_freq = sm501_select_clock( req_freq, &to, 3);
574 reg=to.shift & 0x07; /* bottom 3 bits are shift */
575 if (to.divider == 3)
576 reg |= 0x08; /* /3 divider required */
577 if (to.mclk != 288000000)
578 reg |= 0x10; /* which mclk pll is source */
579 break;
580
581 default:
582 return 0; /* this is bad */
583 }
584
585 mutex_lock(&sm->clock_lock);
586
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000587 mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
588 gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
589 clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
Ben Dooksb6d64542007-02-20 13:58:01 -0800590
591 clock = clock & ~(0xFF << clksrc);
592 clock |= reg<<clksrc;
593
594 mode &= 3; /* find current mode */
595
596 switch (mode) {
597 case 1:
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000598 smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
599 smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
Ben Dooksb6d64542007-02-20 13:58:01 -0800600 mode = 0;
601 break;
602 case 2:
603 case 0:
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000604 smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
605 smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
Ben Dooksb6d64542007-02-20 13:58:01 -0800606 mode = 1;
607 break;
608
609 default:
610 mutex_unlock(&sm->clock_lock);
611 return -1;
612 }
613
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000614 smc501_writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
Ville Syrjala3149be52008-03-04 14:28:50 -0800615
616 if (pll_reg)
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000617 smc501_writel(pll_reg,
618 sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL);
Ville Syrjala3149be52008-03-04 14:28:50 -0800619
Ben Dooksb6d64542007-02-20 13:58:01 -0800620 sm501_sync_regs(sm);
621
Ben Dooks80e74a82008-08-10 23:45:24 +0200622 dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
623 gate, clock, mode);
Ben Dooksb6d64542007-02-20 13:58:01 -0800624
Ben Dooks331d7472007-06-23 17:16:28 -0700625 sm501_mdelay(sm, 16);
Ben Dooksb6d64542007-02-20 13:58:01 -0800626 mutex_unlock(&sm->clock_lock);
627
628 sm501_dump_clk(sm);
629
630 return sm501_freq;
631}
632
633EXPORT_SYMBOL_GPL(sm501_set_clock);
634
635/* sm501_find_clock
636 *
637 * finds the closest available frequency for a given clock
638*/
639
Ville Syrjala3149be52008-03-04 14:28:50 -0800640unsigned long sm501_find_clock(struct device *dev,
641 int clksrc,
Ben Dooksb6d64542007-02-20 13:58:01 -0800642 unsigned long req_freq)
643{
Ville Syrjala3149be52008-03-04 14:28:50 -0800644 struct sm501_devdata *sm = dev_get_drvdata(dev);
Daniel Mack3ad2f3f2010-02-03 08:01:28 +0800645 unsigned long sm501_freq; /* the frequency achieveable by the 501 */
Ben Dooksb6d64542007-02-20 13:58:01 -0800646 struct sm501_clock to;
647
648 switch (clksrc) {
649 case SM501_CLOCK_P2XCLK:
Ville Syrjala3149be52008-03-04 14:28:50 -0800650 if (sm->rev >= 0xC0) {
651 /* SM502 -> use the programmable PLL */
652 sm501_freq = (sm501_calc_pll(2 * req_freq,
653 &to, 5) / 2);
654 } else {
655 sm501_freq = (sm501_select_clock(2 * req_freq,
656 &to, 5) / 2);
657 }
Ben Dooksb6d64542007-02-20 13:58:01 -0800658 break;
659
660 case SM501_CLOCK_V2XCLK:
661 sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
662 break;
663
664 case SM501_CLOCK_MCLK:
665 case SM501_CLOCK_M1XCLK:
666 sm501_freq = sm501_select_clock(req_freq, &to, 3);
667 break;
668
669 default:
670 sm501_freq = 0; /* error */
671 }
672
673 return sm501_freq;
674}
675
676EXPORT_SYMBOL_GPL(sm501_find_clock);
677
678static struct sm501_device *to_sm_device(struct platform_device *pdev)
679{
680 return container_of(pdev, struct sm501_device, pdev);
681}
682
683/* sm501_device_release
684 *
685 * A release function for the platform devices we create to allow us to
686 * free any items we allocated
687*/
688
689static void sm501_device_release(struct device *dev)
690{
691 kfree(to_sm_device(to_platform_device(dev)));
692}
693
694/* sm501_create_subdev
695 *
696 * Create a skeleton platform device with resources for passing to a
697 * sub-driver
698*/
699
700static struct platform_device *
Magnus Damm61711f82008-04-28 02:14:22 -0700701sm501_create_subdev(struct sm501_devdata *sm, char *name,
702 unsigned int res_count, unsigned int platform_data_size)
Ben Dooksb6d64542007-02-20 13:58:01 -0800703{
704 struct sm501_device *smdev;
705
706 smdev = kzalloc(sizeof(struct sm501_device) +
Magnus Damm61711f82008-04-28 02:14:22 -0700707 (sizeof(struct resource) * res_count) +
708 platform_data_size, GFP_KERNEL);
Ben Dooksb6d64542007-02-20 13:58:01 -0800709 if (!smdev)
710 return NULL;
711
712 smdev->pdev.dev.release = sm501_device_release;
713
714 smdev->pdev.name = name;
715 smdev->pdev.id = sm->pdev_id;
Ben Dooksb6d64542007-02-20 13:58:01 -0800716 smdev->pdev.dev.parent = sm->dev;
717
Magnus Damm61711f82008-04-28 02:14:22 -0700718 if (res_count) {
719 smdev->pdev.resource = (struct resource *)(smdev+1);
720 smdev->pdev.num_resources = res_count;
721 }
722 if (platform_data_size)
723 smdev->pdev.dev.platform_data = (void *)(smdev+1);
724
Ben Dooksb6d64542007-02-20 13:58:01 -0800725 return &smdev->pdev;
726}
727
728/* sm501_register_device
729 *
730 * Register a platform device created with sm501_create_subdev()
731*/
732
733static int sm501_register_device(struct sm501_devdata *sm,
734 struct platform_device *pdev)
735{
736 struct sm501_device *smdev = to_sm_device(pdev);
737 int ptr;
738 int ret;
739
740 for (ptr = 0; ptr < pdev->num_resources; ptr++) {
Joe Perches3f3d4310b2010-11-12 13:37:56 -0800741 printk(KERN_DEBUG "%s[%d] %pR\n",
742 pdev->name, ptr, &pdev->resource[ptr]);
Ben Dooksb6d64542007-02-20 13:58:01 -0800743 }
744
745 ret = platform_device_register(pdev);
746
747 if (ret >= 0) {
748 dev_dbg(sm->dev, "registered %s\n", pdev->name);
749 list_add_tail(&smdev->list, &sm->devices);
750 } else
751 dev_err(sm->dev, "error registering %s (%d)\n",
752 pdev->name, ret);
753
754 return ret;
755}
756
757/* sm501_create_subio
758 *
759 * Fill in an IO resource for a sub device
760*/
761
762static void sm501_create_subio(struct sm501_devdata *sm,
763 struct resource *res,
764 resource_size_t offs,
765 resource_size_t size)
766{
767 res->flags = IORESOURCE_MEM;
768 res->parent = sm->io_res;
769 res->start = sm->io_res->start + offs;
770 res->end = res->start + size - 1;
771}
772
773/* sm501_create_mem
774 *
775 * Fill in an MEM resource for a sub device
776*/
777
778static void sm501_create_mem(struct sm501_devdata *sm,
779 struct resource *res,
780 resource_size_t *offs,
781 resource_size_t size)
782{
783 *offs -= size; /* adjust memory size */
784
785 res->flags = IORESOURCE_MEM;
786 res->parent = sm->mem_res;
787 res->start = sm->mem_res->start + *offs;
788 res->end = res->start + size - 1;
789}
790
791/* sm501_create_irq
792 *
793 * Fill in an IRQ resource for a sub device
794*/
795
796static void sm501_create_irq(struct sm501_devdata *sm,
797 struct resource *res)
798{
799 res->flags = IORESOURCE_IRQ;
800 res->parent = NULL;
801 res->start = res->end = sm->irq;
802}
803
804static int sm501_register_usbhost(struct sm501_devdata *sm,
805 resource_size_t *mem_avail)
806{
807 struct platform_device *pdev;
808
Magnus Damm61711f82008-04-28 02:14:22 -0700809 pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0);
Ben Dooksb6d64542007-02-20 13:58:01 -0800810 if (!pdev)
811 return -ENOMEM;
812
813 sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000);
814 sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024);
815 sm501_create_irq(sm, &pdev->resource[2]);
816
817 return sm501_register_device(sm, pdev);
818}
819
Magnus Damm61711f82008-04-28 02:14:22 -0700820static void sm501_setup_uart_data(struct sm501_devdata *sm,
821 struct plat_serial8250_port *uart_data,
822 unsigned int offset)
823{
824 uart_data->membase = sm->regs + offset;
825 uart_data->mapbase = sm->io_res->start + offset;
826 uart_data->iotype = UPIO_MEM;
827 uart_data->irq = sm->irq;
828 uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ;
829 uart_data->regshift = 2;
830 uart_data->uartclk = (9600 * 16);
831}
832
833static int sm501_register_uart(struct sm501_devdata *sm, int devices)
834{
835 struct platform_device *pdev;
836 struct plat_serial8250_port *uart_data;
837
838 pdev = sm501_create_subdev(sm, "serial8250", 0,
839 sizeof(struct plat_serial8250_port) * 3);
840 if (!pdev)
841 return -ENOMEM;
842
Jingoo Han334a41c2013-07-30 17:10:05 +0900843 uart_data = dev_get_platdata(&pdev->dev);
Magnus Damm61711f82008-04-28 02:14:22 -0700844
845 if (devices & SM501_USE_UART0) {
846 sm501_setup_uart_data(sm, uart_data++, 0x30000);
847 sm501_unit_power(sm->dev, SM501_GATE_UART0, 1);
848 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0);
849 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0);
850 }
851 if (devices & SM501_USE_UART1) {
852 sm501_setup_uart_data(sm, uart_data++, 0x30020);
853 sm501_unit_power(sm->dev, SM501_GATE_UART1, 1);
854 sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0);
855 sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0);
856 }
857
858 pdev->id = PLAT8250_DEV_SM501;
859
860 return sm501_register_device(sm, pdev);
861}
862
Ben Dooksb6d64542007-02-20 13:58:01 -0800863static int sm501_register_display(struct sm501_devdata *sm,
864 resource_size_t *mem_avail)
865{
866 struct platform_device *pdev;
867
Magnus Damm61711f82008-04-28 02:14:22 -0700868 pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0);
Ben Dooksb6d64542007-02-20 13:58:01 -0800869 if (!pdev)
870 return -ENOMEM;
871
872 sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000);
873 sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000);
874 sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail);
875 sm501_create_irq(sm, &pdev->resource[3]);
876
877 return sm501_register_device(sm, pdev);
878}
879
Ben Dooksf61be272008-07-25 01:45:59 -0700880#ifdef CONFIG_MFD_SM501_GPIO
881
882static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc)
883{
884 return container_of(gc, struct sm501_gpio_chip, gpio);
885}
886
887static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio)
888{
889 return container_of(gpio, struct sm501_devdata, gpio);
890}
891
892static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset)
893
894{
895 struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip);
896 unsigned long result;
897
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000898 result = smc501_readl(smgpio->regbase + SM501_GPIO_DATA_LOW);
Ben Dooksf61be272008-07-25 01:45:59 -0700899 result >>= offset;
900
901 return result & 1UL;
902}
903
Ben Dooks98325f82009-01-10 16:59:53 +0100904static void sm501_gpio_ensure_gpio(struct sm501_gpio_chip *smchip,
905 unsigned long bit)
906{
907 unsigned long ctrl;
908
909 /* check and modify if this pin is not set as gpio. */
910
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000911 if (smc501_readl(smchip->control) & bit) {
Ben Dooks98325f82009-01-10 16:59:53 +0100912 dev_info(sm501_gpio_to_dev(smchip->ourgpio)->dev,
913 "changing mode of gpio, bit %08lx\n", bit);
914
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000915 ctrl = smc501_readl(smchip->control);
Ben Dooks98325f82009-01-10 16:59:53 +0100916 ctrl &= ~bit;
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000917 smc501_writel(ctrl, smchip->control);
Ben Dooks98325f82009-01-10 16:59:53 +0100918
919 sm501_sync_regs(sm501_gpio_to_dev(smchip->ourgpio));
920 }
921}
922
Ben Dooksf61be272008-07-25 01:45:59 -0700923static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
924
925{
926 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
927 struct sm501_gpio *smgpio = smchip->ourgpio;
928 unsigned long bit = 1 << offset;
929 void __iomem *regs = smchip->regbase;
930 unsigned long save;
931 unsigned long val;
932
933 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
934 __func__, chip, offset);
935
936 spin_lock_irqsave(&smgpio->lock, save);
937
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000938 val = smc501_readl(regs + SM501_GPIO_DATA_LOW) & ~bit;
Ben Dooksf61be272008-07-25 01:45:59 -0700939 if (value)
940 val |= bit;
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000941 smc501_writel(val, regs);
Ben Dooksf61be272008-07-25 01:45:59 -0700942
943 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
Ben Dooks98325f82009-01-10 16:59:53 +0100944 sm501_gpio_ensure_gpio(smchip, bit);
945
Ben Dooksf61be272008-07-25 01:45:59 -0700946 spin_unlock_irqrestore(&smgpio->lock, save);
947}
948
949static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset)
950{
951 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
952 struct sm501_gpio *smgpio = smchip->ourgpio;
953 void __iomem *regs = smchip->regbase;
954 unsigned long bit = 1 << offset;
955 unsigned long save;
956 unsigned long ddr;
957
Ben Dooks98325f82009-01-10 16:59:53 +0100958 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
959 __func__, chip, offset);
Ben Dooksf61be272008-07-25 01:45:59 -0700960
961 spin_lock_irqsave(&smgpio->lock, save);
962
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000963 ddr = smc501_readl(regs + SM501_GPIO_DDR_LOW);
964 smc501_writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW);
Ben Dooksf61be272008-07-25 01:45:59 -0700965
966 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
Ben Dooks98325f82009-01-10 16:59:53 +0100967 sm501_gpio_ensure_gpio(smchip, bit);
968
Ben Dooksf61be272008-07-25 01:45:59 -0700969 spin_unlock_irqrestore(&smgpio->lock, save);
970
971 return 0;
972}
973
974static int sm501_gpio_output(struct gpio_chip *chip,
975 unsigned offset, int value)
976{
977 struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
978 struct sm501_gpio *smgpio = smchip->ourgpio;
979 unsigned long bit = 1 << offset;
980 void __iomem *regs = smchip->regbase;
981 unsigned long save;
982 unsigned long val;
983 unsigned long ddr;
984
985 dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n",
986 __func__, chip, offset, value);
987
988 spin_lock_irqsave(&smgpio->lock, save);
989
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000990 val = smc501_readl(regs + SM501_GPIO_DATA_LOW);
Ben Dooksf61be272008-07-25 01:45:59 -0700991 if (value)
992 val |= bit;
993 else
994 val &= ~bit;
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000995 smc501_writel(val, regs);
Ben Dooksf61be272008-07-25 01:45:59 -0700996
Heiko Schocherbf5f0012011-01-24 09:57:20 +0000997 ddr = smc501_readl(regs + SM501_GPIO_DDR_LOW);
998 smc501_writel(ddr | bit, regs + SM501_GPIO_DDR_LOW);
Ben Dooksf61be272008-07-25 01:45:59 -0700999
1000 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001001 smc501_writel(val, regs + SM501_GPIO_DATA_LOW);
Ben Dooksf61be272008-07-25 01:45:59 -07001002
1003 sm501_sync_regs(sm501_gpio_to_dev(smgpio));
1004 spin_unlock_irqrestore(&smgpio->lock, save);
1005
1006 return 0;
1007}
1008
1009static struct gpio_chip gpio_chip_template = {
1010 .ngpio = 32,
1011 .direction_input = sm501_gpio_input,
1012 .direction_output = sm501_gpio_output,
1013 .set = sm501_gpio_set,
1014 .get = sm501_gpio_get,
1015};
1016
Bill Pembertonf791be42012-11-19 13:23:04 -05001017static int sm501_gpio_register_chip(struct sm501_devdata *sm,
Ben Dooksf61be272008-07-25 01:45:59 -07001018 struct sm501_gpio *gpio,
1019 struct sm501_gpio_chip *chip)
1020{
1021 struct sm501_platdata *pdata = sm->platdata;
1022 struct gpio_chip *gchip = &chip->gpio;
Arnaud Patard60e540d2008-07-25 01:46:00 -07001023 int base = pdata->gpio_base;
Ben Dooksf61be272008-07-25 01:45:59 -07001024
Ben Dooks28130be2008-07-25 01:46:02 -07001025 chip->gpio = gpio_chip_template;
Ben Dooksf61be272008-07-25 01:45:59 -07001026
1027 if (chip == &gpio->high) {
Arnaud Patard60e540d2008-07-25 01:46:00 -07001028 if (base > 0)
1029 base += 32;
Ben Dooksf61be272008-07-25 01:45:59 -07001030 chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH;
Ben Dooks98325f82009-01-10 16:59:53 +01001031 chip->control = sm->regs + SM501_GPIO63_32_CONTROL;
Ben Dooksf61be272008-07-25 01:45:59 -07001032 gchip->label = "SM501-HIGH";
1033 } else {
1034 chip->regbase = gpio->regs + SM501_GPIO_DATA_LOW;
Ben Dooks98325f82009-01-10 16:59:53 +01001035 chip->control = sm->regs + SM501_GPIO31_0_CONTROL;
Ben Dooksf61be272008-07-25 01:45:59 -07001036 gchip->label = "SM501-LOW";
1037 }
1038
1039 gchip->base = base;
1040 chip->ourgpio = gpio;
1041
1042 return gpiochip_add(gchip);
1043}
1044
Bill Pembertonf791be42012-11-19 13:23:04 -05001045static int sm501_register_gpio(struct sm501_devdata *sm)
Ben Dooksf61be272008-07-25 01:45:59 -07001046{
1047 struct sm501_gpio *gpio = &sm->gpio;
1048 resource_size_t iobase = sm->io_res->start + SM501_GPIO;
1049 int ret;
1050 int tmp;
1051
1052 dev_dbg(sm->dev, "registering gpio block %08llx\n",
1053 (unsigned long long)iobase);
1054
1055 spin_lock_init(&gpio->lock);
1056
1057 gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio");
1058 if (gpio->regs_res == NULL) {
1059 dev_err(sm->dev, "gpio: failed to request region\n");
1060 return -ENXIO;
1061 }
1062
1063 gpio->regs = ioremap(iobase, 0x20);
1064 if (gpio->regs == NULL) {
1065 dev_err(sm->dev, "gpio: failed to remap registers\n");
1066 ret = -ENXIO;
Ben Dooks28130be2008-07-25 01:46:02 -07001067 goto err_claimed;
Ben Dooksf61be272008-07-25 01:45:59 -07001068 }
1069
1070 /* Register both our chips. */
1071
1072 ret = sm501_gpio_register_chip(sm, gpio, &gpio->low);
1073 if (ret) {
1074 dev_err(sm->dev, "failed to add low chip\n");
1075 goto err_mapped;
1076 }
1077
1078 ret = sm501_gpio_register_chip(sm, gpio, &gpio->high);
1079 if (ret) {
1080 dev_err(sm->dev, "failed to add high chip\n");
1081 goto err_low_chip;
1082 }
1083
1084 gpio->registered = 1;
1085
1086 return 0;
1087
1088 err_low_chip:
1089 tmp = gpiochip_remove(&gpio->low.gpio);
1090 if (tmp) {
1091 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1092 return ret;
1093 }
1094
1095 err_mapped:
Ben Dooks28130be2008-07-25 01:46:02 -07001096 iounmap(gpio->regs);
1097
1098 err_claimed:
Ben Dooksf61be272008-07-25 01:45:59 -07001099 release_resource(gpio->regs_res);
1100 kfree(gpio->regs_res);
1101
1102 return ret;
1103}
1104
1105static void sm501_gpio_remove(struct sm501_devdata *sm)
1106{
Ben Dooks28130be2008-07-25 01:46:02 -07001107 struct sm501_gpio *gpio = &sm->gpio;
Ben Dooksf61be272008-07-25 01:45:59 -07001108 int ret;
1109
Ben Dooksf2999202008-07-25 01:46:02 -07001110 if (!sm->gpio.registered)
1111 return;
1112
Ben Dooks28130be2008-07-25 01:46:02 -07001113 ret = gpiochip_remove(&gpio->low.gpio);
Ben Dooksf61be272008-07-25 01:45:59 -07001114 if (ret)
1115 dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n");
1116
Ben Dooks28130be2008-07-25 01:46:02 -07001117 ret = gpiochip_remove(&gpio->high.gpio);
Ben Dooksf61be272008-07-25 01:45:59 -07001118 if (ret)
1119 dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n");
Ben Dooks28130be2008-07-25 01:46:02 -07001120
1121 iounmap(gpio->regs);
1122 release_resource(gpio->regs_res);
1123 kfree(gpio->regs_res);
Ben Dooksf61be272008-07-25 01:45:59 -07001124}
1125
Ben Dooks28130be2008-07-25 01:46:02 -07001126static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
Ben Dooks42cd2362008-07-25 01:46:01 -07001127{
1128 struct sm501_gpio *gpio = &sm->gpio;
Ben Dooks53a96002008-07-25 01:46:03 -07001129 int base = (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base;
1130
1131 return (pin % 32) + base;
Ben Dooks42cd2362008-07-25 01:46:01 -07001132}
Ben Dooksf2999202008-07-25 01:46:02 -07001133
1134static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
1135{
1136 return sm->gpio.registered;
1137}
Ben Dooksf61be272008-07-25 01:45:59 -07001138#else
Ben Dooks28130be2008-07-25 01:46:02 -07001139static inline int sm501_register_gpio(struct sm501_devdata *sm)
Ben Dooksf61be272008-07-25 01:45:59 -07001140{
1141 return 0;
1142}
1143
Ben Dooks28130be2008-07-25 01:46:02 -07001144static inline void sm501_gpio_remove(struct sm501_devdata *sm)
Ben Dooksf61be272008-07-25 01:45:59 -07001145{
1146}
Ben Dooks42cd2362008-07-25 01:46:01 -07001147
Ben Dooks28130be2008-07-25 01:46:02 -07001148static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin)
Ben Dooks42cd2362008-07-25 01:46:01 -07001149{
1150 return -1;
1151}
Ben Dooksf2999202008-07-25 01:46:02 -07001152
1153static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
1154{
1155 return 0;
1156}
Ben Dooksf61be272008-07-25 01:45:59 -07001157#endif
1158
Ben Dooks42cd2362008-07-25 01:46:01 -07001159static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
1160 struct sm501_platdata_gpio_i2c *iic)
1161{
1162 struct i2c_gpio_platform_data *icd;
1163 struct platform_device *pdev;
1164
1165 pdev = sm501_create_subdev(sm, "i2c-gpio", 0,
1166 sizeof(struct i2c_gpio_platform_data));
1167 if (!pdev)
1168 return -ENOMEM;
1169
Jingoo Han334a41c2013-07-30 17:10:05 +09001170 icd = dev_get_platdata(&pdev->dev);
Ben Dooks42cd2362008-07-25 01:46:01 -07001171
1172 /* We keep the pin_sda and pin_scl fields relative in case the
1173 * same platform data is passed to >1 SM501.
1174 */
1175
1176 icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda);
1177 icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl);
1178 icd->timeout = iic->timeout;
1179 icd->udelay = iic->udelay;
1180
1181 /* note, we can't use either of the pin numbers, as the i2c-gpio
1182 * driver uses the platform.id field to generate the bus number
1183 * to register with the i2c core; The i2c core doesn't have enough
1184 * entries to deal with anything we currently use.
1185 */
1186
1187 pdev->id = iic->bus_num;
1188
1189 dev_info(sm->dev, "registering i2c-%d: sda=%d (%d), scl=%d (%d)\n",
1190 iic->bus_num,
1191 icd->sda_pin, iic->pin_sda, icd->scl_pin, iic->pin_scl);
1192
1193 return sm501_register_device(sm, pdev);
1194}
1195
1196static int sm501_register_gpio_i2c(struct sm501_devdata *sm,
1197 struct sm501_platdata *pdata)
1198{
1199 struct sm501_platdata_gpio_i2c *iic = pdata->gpio_i2c;
1200 int index;
1201 int ret;
1202
1203 for (index = 0; index < pdata->gpio_i2c_nr; index++, iic++) {
1204 ret = sm501_register_gpio_i2c_instance(sm, iic);
1205 if (ret < 0)
1206 return ret;
1207 }
1208
1209 return 0;
1210}
1211
Ben Dooksb6d64542007-02-20 13:58:01 -08001212/* sm501_dbg_regs
1213 *
1214 * Debug attribute to attach to parent device to show core registers
1215*/
1216
1217static ssize_t sm501_dbg_regs(struct device *dev,
1218 struct device_attribute *attr, char *buff)
1219{
1220 struct sm501_devdata *sm = dev_get_drvdata(dev) ;
1221 unsigned int reg;
1222 char *ptr = buff;
1223 int ret;
1224
1225 for (reg = 0x00; reg < 0x70; reg += 4) {
1226 ret = sprintf(ptr, "%08x = %08x\n",
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001227 reg, smc501_readl(sm->regs + reg));
Ben Dooksb6d64542007-02-20 13:58:01 -08001228 ptr += ret;
1229 }
1230
1231 return ptr - buff;
1232}
1233
1234
1235static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL);
1236
1237/* sm501_init_reg
1238 *
1239 * Helper function for the init code to setup a register
Ben Dooks51362372007-06-23 17:16:29 -07001240 *
1241 * clear the bits which are set in r->mask, and then set
1242 * the bits set in r->set.
Ben Dooksb6d64542007-02-20 13:58:01 -08001243*/
1244
1245static inline void sm501_init_reg(struct sm501_devdata *sm,
1246 unsigned long reg,
1247 struct sm501_reg_init *r)
1248{
1249 unsigned long tmp;
1250
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001251 tmp = smc501_readl(sm->regs + reg);
Ben Dooksb6d64542007-02-20 13:58:01 -08001252 tmp &= ~r->mask;
Ben Dooks51362372007-06-23 17:16:29 -07001253 tmp |= r->set;
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001254 smc501_writel(tmp, sm->regs + reg);
Ben Dooksb6d64542007-02-20 13:58:01 -08001255}
1256
1257/* sm501_init_regs
1258 *
1259 * Setup core register values
1260*/
1261
1262static void sm501_init_regs(struct sm501_devdata *sm,
1263 struct sm501_initdata *init)
1264{
1265 sm501_misc_control(sm->dev,
1266 init->misc_control.set,
1267 init->misc_control.mask);
1268
1269 sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing);
1270 sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low);
1271 sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high);
1272
Ben Dooksb6d64542007-02-20 13:58:01 -08001273 if (init->m1xclk) {
1274 dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk);
1275 sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk);
1276 }
Ben Dooksb5913bb2007-06-23 17:16:29 -07001277
1278 if (init->mclk) {
1279 dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk);
1280 sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk);
1281 }
Ben Dooks81906222007-06-23 17:16:30 -07001282
1283}
1284
1285/* Check the PLL sources for the M1CLK and M1XCLK
1286 *
1287 * If the M1CLK and M1XCLKs are not sourced from the same PLL, then
1288 * there is a risk (see errata AB-5) that the SM501 will cease proper
1289 * function. If this happens, then it is likely the SM501 will
1290 * hang the system.
1291*/
1292
1293static int sm501_check_clocks(struct sm501_devdata *sm)
1294{
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001295 unsigned long pwrmode = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
Ben Dooks81906222007-06-23 17:16:30 -07001296 unsigned long msrc = (pwrmode & SM501_POWERMODE_M_SRC);
1297 unsigned long m1src = (pwrmode & SM501_POWERMODE_M1_SRC);
1298
1299 return ((msrc == 0 && m1src != 0) || (msrc != 0 && m1src == 0));
Ben Dooksb6d64542007-02-20 13:58:01 -08001300}
1301
1302static unsigned int sm501_mem_local[] = {
1303 [0] = 4*1024*1024,
1304 [1] = 8*1024*1024,
1305 [2] = 16*1024*1024,
1306 [3] = 32*1024*1024,
1307 [4] = 64*1024*1024,
1308 [5] = 2*1024*1024,
1309};
1310
1311/* sm501_init_dev
1312 *
1313 * Common init code for an SM501
1314*/
1315
Bill Pembertonf791be42012-11-19 13:23:04 -05001316static int sm501_init_dev(struct sm501_devdata *sm)
Ben Dooksb6d64542007-02-20 13:58:01 -08001317{
Magnus Damm61711f82008-04-28 02:14:22 -07001318 struct sm501_initdata *idata;
Ben Dooks42cd2362008-07-25 01:46:01 -07001319 struct sm501_platdata *pdata;
Ben Dooksb6d64542007-02-20 13:58:01 -08001320 resource_size_t mem_avail;
1321 unsigned long dramctrl;
Ben Dooks1e27dbe2007-06-23 17:16:31 -07001322 unsigned long devid;
Ben Dooksb6d64542007-02-20 13:58:01 -08001323 int ret;
1324
1325 mutex_init(&sm->clock_lock);
1326 spin_lock_init(&sm->reg_lock);
1327
1328 INIT_LIST_HEAD(&sm->devices);
1329
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001330 devid = smc501_readl(sm->regs + SM501_DEVICEID);
Ben Dooksb6d64542007-02-20 13:58:01 -08001331
Ben Dooks1e27dbe2007-06-23 17:16:31 -07001332 if ((devid & SM501_DEVICEID_IDMASK) != SM501_DEVICEID_SM501) {
1333 dev_err(sm->dev, "incorrect device id %08lx\n", devid);
1334 return -EINVAL;
1335 }
1336
Magnus Damm61711f82008-04-28 02:14:22 -07001337 /* disable irqs */
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001338 smc501_writel(0, sm->regs + SM501_IRQ_MASK);
Magnus Damm61711f82008-04-28 02:14:22 -07001339
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001340 dramctrl = smc501_readl(sm->regs + SM501_DRAM_CONTROL);
Ben Dooksb6d64542007-02-20 13:58:01 -08001341 mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7];
1342
Ben Dooks1e27dbe2007-06-23 17:16:31 -07001343 dev_info(sm->dev, "SM501 At %p: Version %08lx, %ld Mb, IRQ %d\n",
1344 sm->regs, devid, (unsigned long)mem_avail >> 20, sm->irq);
Ben Dooksb6d64542007-02-20 13:58:01 -08001345
Ville Syrjala3149be52008-03-04 14:28:50 -08001346 sm->rev = devid & SM501_DEVICEID_REVMASK;
1347
Ben Dooks331d7472007-06-23 17:16:28 -07001348 sm501_dump_gate(sm);
Ben Dooksb6d64542007-02-20 13:58:01 -08001349
1350 ret = device_create_file(sm->dev, &dev_attr_dbg_regs);
1351 if (ret)
1352 dev_err(sm->dev, "failed to create debug regs file\n");
1353
1354 sm501_dump_clk(sm);
1355
1356 /* check to see if we have some device initialisation */
1357
Ben Dooks42cd2362008-07-25 01:46:01 -07001358 pdata = sm->platdata;
1359 idata = pdata ? pdata->init : NULL;
1360
Magnus Damm61711f82008-04-28 02:14:22 -07001361 if (idata) {
1362 sm501_init_regs(sm, idata);
Ben Dooksb6d64542007-02-20 13:58:01 -08001363
Magnus Damm61711f82008-04-28 02:14:22 -07001364 if (idata->devices & SM501_USE_USB_HOST)
1365 sm501_register_usbhost(sm, &mem_avail);
1366 if (idata->devices & (SM501_USE_UART0 | SM501_USE_UART1))
1367 sm501_register_uart(sm, idata->devices);
Ben Dooksf61be272008-07-25 01:45:59 -07001368 if (idata->devices & SM501_USE_GPIO)
1369 sm501_register_gpio(sm);
Ben Dooksb6d64542007-02-20 13:58:01 -08001370 }
1371
Heiko Schocher4295f9b2011-01-26 07:21:30 +00001372 if (pdata && pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
Ben Dooksf2999202008-07-25 01:46:02 -07001373 if (!sm501_gpio_isregistered(sm))
1374 dev_err(sm->dev, "no gpio available for i2c gpio.\n");
Ben Dooks42cd2362008-07-25 01:46:01 -07001375 else
1376 sm501_register_gpio_i2c(sm, pdata);
1377 }
1378
Ben Dooks81906222007-06-23 17:16:30 -07001379 ret = sm501_check_clocks(sm);
1380 if (ret) {
1381 dev_err(sm->dev, "M1X and M clocks sourced from different "
1382 "PLLs\n");
1383 return -EINVAL;
1384 }
1385
Ben Dooksb6d64542007-02-20 13:58:01 -08001386 /* always create a framebuffer */
1387 sm501_register_display(sm, &mem_avail);
1388
1389 return 0;
1390}
1391
Bill Pembertonf791be42012-11-19 13:23:04 -05001392static int sm501_plat_probe(struct platform_device *dev)
Ben Dooksb6d64542007-02-20 13:58:01 -08001393{
1394 struct sm501_devdata *sm;
Roel Kluin7cf52442008-10-22 01:39:55 +02001395 int ret;
Ben Dooksb6d64542007-02-20 13:58:01 -08001396
1397 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1398 if (sm == NULL) {
1399 dev_err(&dev->dev, "no memory for device data\n");
Roel Kluin7cf52442008-10-22 01:39:55 +02001400 ret = -ENOMEM;
Ben Dooksb6d64542007-02-20 13:58:01 -08001401 goto err1;
1402 }
1403
1404 sm->dev = &dev->dev;
1405 sm->pdev_id = dev->id;
Jingoo Han334a41c2013-07-30 17:10:05 +09001406 sm->platdata = dev_get_platdata(&dev->dev);
Ben Dooksb6d64542007-02-20 13:58:01 -08001407
Roel Kluin7cf52442008-10-22 01:39:55 +02001408 ret = platform_get_irq(dev, 0);
1409 if (ret < 0) {
Ben Dooksb6d64542007-02-20 13:58:01 -08001410 dev_err(&dev->dev, "failed to get irq resource\n");
Ben Dooksb6d64542007-02-20 13:58:01 -08001411 goto err_res;
1412 }
Roel Kluin7cf52442008-10-22 01:39:55 +02001413 sm->irq = ret;
Ben Dooksb6d64542007-02-20 13:58:01 -08001414
Roel Kluin7cf52442008-10-22 01:39:55 +02001415 sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1416 sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
Heiko Schocher4295f9b2011-01-26 07:21:30 +00001417
Ben Dooksb6d64542007-02-20 13:58:01 -08001418 if (sm->io_res == NULL || sm->mem_res == NULL) {
1419 dev_err(&dev->dev, "failed to get IO resource\n");
Roel Kluin7cf52442008-10-22 01:39:55 +02001420 ret = -ENOENT;
Ben Dooksb6d64542007-02-20 13:58:01 -08001421 goto err_res;
1422 }
1423
1424 sm->regs_claim = request_mem_region(sm->io_res->start,
Samuel Ortiza5300dc2010-03-08 20:07:48 +01001425 0x100, "sm501");
Ben Dooksb6d64542007-02-20 13:58:01 -08001426
1427 if (sm->regs_claim == NULL) {
1428 dev_err(&dev->dev, "cannot claim registers\n");
Roel Kluin7cf52442008-10-22 01:39:55 +02001429 ret = -EBUSY;
Ben Dooksb6d64542007-02-20 13:58:01 -08001430 goto err_res;
1431 }
1432
1433 platform_set_drvdata(dev, sm);
1434
H Hartley Sweeten311e54c2010-01-05 19:55:54 +01001435 sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res));
Ben Dooksb6d64542007-02-20 13:58:01 -08001436
1437 if (sm->regs == NULL) {
1438 dev_err(&dev->dev, "cannot remap registers\n");
Roel Kluin7cf52442008-10-22 01:39:55 +02001439 ret = -EIO;
Ben Dooksb6d64542007-02-20 13:58:01 -08001440 goto err_claim;
1441 }
1442
1443 return sm501_init_dev(sm);
1444
1445 err_claim:
1446 release_resource(sm->regs_claim);
1447 kfree(sm->regs_claim);
1448 err_res:
1449 kfree(sm);
1450 err1:
Roel Kluin7cf52442008-10-22 01:39:55 +02001451 return ret;
Ben Dooksb6d64542007-02-20 13:58:01 -08001452
1453}
1454
Ben Dooks331d7472007-06-23 17:16:28 -07001455#ifdef CONFIG_PM
Ben Dooks472dba72008-07-25 01:45:58 -07001456
Ben Dooks331d7472007-06-23 17:16:28 -07001457/* power management support */
1458
Ben Dooks472dba72008-07-25 01:45:58 -07001459static void sm501_set_power(struct sm501_devdata *sm, int on)
1460{
1461 struct sm501_platdata *pd = sm->platdata;
1462
1463 if (pd == NULL)
1464 return;
1465
1466 if (pd->get_power) {
1467 if (pd->get_power(sm->dev) == on) {
1468 dev_dbg(sm->dev, "is already %d\n", on);
1469 return;
1470 }
1471 }
1472
1473 if (pd->set_power) {
1474 dev_dbg(sm->dev, "setting power to %d\n", on);
1475
1476 pd->set_power(sm->dev, on);
1477 sm501_mdelay(sm, 10);
1478 }
1479}
1480
Ben Dooks331d7472007-06-23 17:16:28 -07001481static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state)
1482{
1483 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1484
1485 sm->in_suspend = 1;
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001486 sm->pm_misc = smc501_readl(sm->regs + SM501_MISC_CONTROL);
Ben Dooks331d7472007-06-23 17:16:28 -07001487
1488 sm501_dump_regs(sm);
Ben Dooks472dba72008-07-25 01:45:58 -07001489
1490 if (sm->platdata) {
1491 if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF)
1492 sm501_set_power(sm, 0);
1493 }
1494
Ben Dooks331d7472007-06-23 17:16:28 -07001495 return 0;
1496}
1497
1498static int sm501_plat_resume(struct platform_device *pdev)
1499{
1500 struct sm501_devdata *sm = platform_get_drvdata(pdev);
1501
Ben Dooks472dba72008-07-25 01:45:58 -07001502 sm501_set_power(sm, 1);
1503
Ben Dooks331d7472007-06-23 17:16:28 -07001504 sm501_dump_regs(sm);
1505 sm501_dump_gate(sm);
1506 sm501_dump_clk(sm);
1507
1508 /* check to see if we are in the same state as when suspended */
1509
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001510 if (smc501_readl(sm->regs + SM501_MISC_CONTROL) != sm->pm_misc) {
Ben Dooks331d7472007-06-23 17:16:28 -07001511 dev_info(sm->dev, "SM501_MISC_CONTROL changed over sleep\n");
Heiko Schocherbf5f0012011-01-24 09:57:20 +00001512 smc501_writel(sm->pm_misc, sm->regs + SM501_MISC_CONTROL);
Ben Dooks331d7472007-06-23 17:16:28 -07001513
1514 /* our suspend causes the controller state to change,
1515 * either by something attempting setup, power loss,
1516 * or an external reset event on power change */
1517
1518 if (sm->platdata && sm->platdata->init) {
1519 sm501_init_regs(sm, sm->platdata->init);
1520 }
1521 }
1522
1523 /* dump our state from resume */
1524
1525 sm501_dump_regs(sm);
1526 sm501_dump_clk(sm);
1527
1528 sm->in_suspend = 0;
1529
1530 return 0;
1531}
1532#else
1533#define sm501_plat_suspend NULL
1534#define sm501_plat_resume NULL
1535#endif
1536
Ben Dooksb6d64542007-02-20 13:58:01 -08001537/* Initialisation data for PCI devices */
1538
1539static struct sm501_initdata sm501_pci_initdata = {
1540 .gpio_high = {
1541 .set = 0x3F000000, /* 24bit panel */
1542 .mask = 0x0,
1543 },
1544 .misc_timing = {
1545 .set = 0x010100, /* SDRAM timing */
1546 .mask = 0x1F1F00,
1547 },
1548 .misc_control = {
1549 .set = SM501_MISC_PNL_24BIT,
1550 .mask = 0,
1551 },
1552
1553 .devices = SM501_USE_ALL,
Ben Dooks81906222007-06-23 17:16:30 -07001554
1555 /* Errata AB-3 says that 72MHz is the fastest available
1556 * for 33MHZ PCI with proper bus-mastering operation */
1557
1558 .mclk = 72 * MHZ,
1559 .m1xclk = 144 * MHZ,
Ben Dooksb6d64542007-02-20 13:58:01 -08001560};
1561
1562static struct sm501_platdata_fbsub sm501_pdata_fbsub = {
1563 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1564 SM501FB_FLAG_USE_HWCURSOR |
1565 SM501FB_FLAG_USE_HWACCEL |
1566 SM501FB_FLAG_DISABLE_AT_EXIT),
1567};
1568
1569static struct sm501_platdata_fb sm501_fb_pdata = {
1570 .fb_route = SM501_FB_OWN,
1571 .fb_crt = &sm501_pdata_fbsub,
1572 .fb_pnl = &sm501_pdata_fbsub,
1573};
1574
1575static struct sm501_platdata sm501_pci_platdata = {
1576 .init = &sm501_pci_initdata,
1577 .fb = &sm501_fb_pdata,
Arnaud Patard60e540d2008-07-25 01:46:00 -07001578 .gpio_base = -1,
Ben Dooksb6d64542007-02-20 13:58:01 -08001579};
1580
Bill Pembertonf791be42012-11-19 13:23:04 -05001581static int sm501_pci_probe(struct pci_dev *dev,
Alexey Dobriyan158abca2009-02-17 09:10:19 +01001582 const struct pci_device_id *id)
Ben Dooksb6d64542007-02-20 13:58:01 -08001583{
1584 struct sm501_devdata *sm;
1585 int err;
1586
1587 sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
1588 if (sm == NULL) {
1589 dev_err(&dev->dev, "no memory for device data\n");
1590 err = -ENOMEM;
1591 goto err1;
1592 }
1593
1594 /* set a default set of platform data */
1595 dev->dev.platform_data = sm->platdata = &sm501_pci_platdata;
1596
1597 /* set a hopefully unique id for our child platform devices */
1598 sm->pdev_id = 32 + dev->devfn;
1599
1600 pci_set_drvdata(dev, sm);
1601
1602 err = pci_enable_device(dev);
1603 if (err) {
1604 dev_err(&dev->dev, "cannot enable device\n");
1605 goto err2;
1606 }
1607
1608 sm->dev = &dev->dev;
1609 sm->irq = dev->irq;
1610
1611#ifdef __BIG_ENDIAN
1612 /* if the system is big-endian, we most probably have a
1613 * translation in the IO layer making the PCI bus little endian
1614 * so make the framebuffer swapped pixels */
1615
1616 sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN;
1617#endif
1618
1619 /* check our resources */
1620
1621 if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) {
1622 dev_err(&dev->dev, "region #0 is not memory?\n");
1623 err = -EINVAL;
1624 goto err3;
1625 }
1626
1627 if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) {
1628 dev_err(&dev->dev, "region #1 is not memory?\n");
1629 err = -EINVAL;
1630 goto err3;
1631 }
1632
1633 /* make our resources ready for sharing */
1634
1635 sm->io_res = &dev->resource[1];
1636 sm->mem_res = &dev->resource[0];
1637
1638 sm->regs_claim = request_mem_region(sm->io_res->start,
Samuel Ortiza5300dc2010-03-08 20:07:48 +01001639 0x100, "sm501");
Ben Dooksb6d64542007-02-20 13:58:01 -08001640 if (sm->regs_claim == NULL) {
1641 dev_err(&dev->dev, "cannot claim registers\n");
1642 err= -EBUSY;
1643 goto err3;
1644 }
1645
Arjan van de Ven7ab18992008-09-28 16:14:52 -07001646 sm->regs = pci_ioremap_bar(dev, 1);
Ben Dooksb6d64542007-02-20 13:58:01 -08001647
1648 if (sm->regs == NULL) {
1649 dev_err(&dev->dev, "cannot remap registers\n");
1650 err = -EIO;
1651 goto err4;
1652 }
1653
1654 sm501_init_dev(sm);
1655 return 0;
1656
1657 err4:
1658 release_resource(sm->regs_claim);
1659 kfree(sm->regs_claim);
1660 err3:
1661 pci_disable_device(dev);
1662 err2:
1663 pci_set_drvdata(dev, NULL);
1664 kfree(sm);
1665 err1:
1666 return err;
1667}
1668
1669static void sm501_remove_sub(struct sm501_devdata *sm,
1670 struct sm501_device *smdev)
1671{
1672 list_del(&smdev->list);
1673 platform_device_unregister(&smdev->pdev);
1674}
1675
1676static void sm501_dev_remove(struct sm501_devdata *sm)
1677{
1678 struct sm501_device *smdev, *tmp;
1679
1680 list_for_each_entry_safe(smdev, tmp, &sm->devices, list)
1681 sm501_remove_sub(sm, smdev);
1682
1683 device_remove_file(sm->dev, &dev_attr_dbg_regs);
Ben Dooksf61be272008-07-25 01:45:59 -07001684
Ben Dooksf2999202008-07-25 01:46:02 -07001685 sm501_gpio_remove(sm);
Ben Dooksb6d64542007-02-20 13:58:01 -08001686}
1687
Bill Pemberton4740f732012-11-19 13:26:01 -05001688static void sm501_pci_remove(struct pci_dev *dev)
Ben Dooksb6d64542007-02-20 13:58:01 -08001689{
1690 struct sm501_devdata *sm = pci_get_drvdata(dev);
1691
1692 sm501_dev_remove(sm);
1693 iounmap(sm->regs);
1694
1695 release_resource(sm->regs_claim);
1696 kfree(sm->regs_claim);
1697
1698 pci_set_drvdata(dev, NULL);
1699 pci_disable_device(dev);
1700}
1701
1702static int sm501_plat_remove(struct platform_device *dev)
1703{
1704 struct sm501_devdata *sm = platform_get_drvdata(dev);
1705
1706 sm501_dev_remove(sm);
1707 iounmap(sm->regs);
1708
1709 release_resource(sm->regs_claim);
1710 kfree(sm->regs_claim);
1711
1712 return 0;
1713}
1714
Axel Lin61485c62011-12-01 09:41:03 +08001715static DEFINE_PCI_DEVICE_TABLE(sm501_pci_tbl) = {
Ben Dooksb6d64542007-02-20 13:58:01 -08001716 { 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1717 { 0, },
1718};
1719
1720MODULE_DEVICE_TABLE(pci, sm501_pci_tbl);
1721
Alexey Dobriyan158abca2009-02-17 09:10:19 +01001722static struct pci_driver sm501_pci_driver = {
Ben Dooksb6d64542007-02-20 13:58:01 -08001723 .name = "sm501",
1724 .id_table = sm501_pci_tbl,
1725 .probe = sm501_pci_probe,
Bill Pemberton84449212012-11-19 13:20:24 -05001726 .remove = sm501_pci_remove,
Ben Dooksb6d64542007-02-20 13:58:01 -08001727};
1728
Kay Sievers4f46d6e2008-07-25 01:45:47 -07001729MODULE_ALIAS("platform:sm501");
1730
Bill Pembertona9e9ce42012-11-19 13:24:21 -05001731static struct of_device_id of_sm501_match_tbl[] = {
Heiko Schocher4295f9b2011-01-26 07:21:30 +00001732 { .compatible = "smi,sm501", },
1733 { /* end */ }
1734};
1735
Alexey Dobriyan158abca2009-02-17 09:10:19 +01001736static struct platform_driver sm501_plat_driver = {
Ben Dooksb6d64542007-02-20 13:58:01 -08001737 .driver = {
1738 .name = "sm501",
1739 .owner = THIS_MODULE,
Heiko Schocher4295f9b2011-01-26 07:21:30 +00001740 .of_match_table = of_sm501_match_tbl,
Ben Dooksb6d64542007-02-20 13:58:01 -08001741 },
1742 .probe = sm501_plat_probe,
1743 .remove = sm501_plat_remove,
Ben Dooks331d7472007-06-23 17:16:28 -07001744 .suspend = sm501_plat_suspend,
1745 .resume = sm501_plat_resume,
Ben Dooksb6d64542007-02-20 13:58:01 -08001746};
1747
1748static int __init sm501_base_init(void)
1749{
Alexey Dobriyan158abca2009-02-17 09:10:19 +01001750 platform_driver_register(&sm501_plat_driver);
1751 return pci_register_driver(&sm501_pci_driver);
Ben Dooksb6d64542007-02-20 13:58:01 -08001752}
1753
1754static void __exit sm501_base_exit(void)
1755{
Alexey Dobriyan158abca2009-02-17 09:10:19 +01001756 platform_driver_unregister(&sm501_plat_driver);
1757 pci_unregister_driver(&sm501_pci_driver);
Ben Dooksb6d64542007-02-20 13:58:01 -08001758}
1759
1760module_init(sm501_base_init);
1761module_exit(sm501_base_exit);
1762
1763MODULE_DESCRIPTION("SM501 Core Driver");
1764MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Vincent Sanders");
1765MODULE_LICENSE("GPL v2");