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7#include <linux/clk.h>
8#include <linux/clk/mxs.h>
9#include <linux/clkdev.h>
10#include <linux/delay.h>
11#include <linux/err.h>
12#include <linux/gpio.h>
13#include <linux/init.h>
14#include <linux/irqchip/mxs.h>
15#include <linux/reboot.h>
16#include <linux/micrel_phy.h>
17#include <linux/of_address.h>
18#include <linux/of_platform.h>
19#include <linux/phy.h>
20#include <linux/pinctrl/consumer.h>
21#include <linux/sys_soc.h>
22#include <asm/mach/arch.h>
23#include <asm/mach/map.h>
24#include <asm/mach/time.h>
25#include <asm/system_misc.h>
26
27#include "pm.h"
28
29
30#define MXS_DIGCTL_SAIF_CLKMUX_DIRECT 0x0
31#define MXS_DIGCTL_SAIF_CLKMUX_CROSSINPUT 0x1
32#define MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0 0x2
33#define MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR1 0x3
34
35#define HW_DIGCTL_CHIPID 0x310
36#define HW_DIGCTL_CHIPID_MASK (0xffff << 16)
37#define HW_DIGCTL_REV_MASK 0xff
38#define HW_DIGCTL_CHIPID_MX23 (0x3780 << 16)
39#define HW_DIGCTL_CHIPID_MX28 (0x2800 << 16)
40
41#define MXS_CHIP_REVISION_1_0 0x10
42#define MXS_CHIP_REVISION_1_1 0x11
43#define MXS_CHIP_REVISION_1_2 0x12
44#define MXS_CHIP_REVISION_1_3 0x13
45#define MXS_CHIP_REVISION_1_4 0x14
46#define MXS_CHIP_REV_UNKNOWN 0xff
47
48#define MXS_GPIO_NR(bank, nr) ((bank) * 32 + (nr))
49
50#define MXS_SET_ADDR 0x4
51#define MXS_CLR_ADDR 0x8
52#define MXS_TOG_ADDR 0xc
53
54static u32 chipid;
55static u32 socid;
56
57static void __iomem *reset_addr;
58
59static inline void __mxs_setl(u32 mask, void __iomem *reg)
60{
61 __raw_writel(mask, reg + MXS_SET_ADDR);
62}
63
64static inline void __mxs_clrl(u32 mask, void __iomem *reg)
65{
66 __raw_writel(mask, reg + MXS_CLR_ADDR);
67}
68
69static inline void __mxs_togl(u32 mask, void __iomem *reg)
70{
71 __raw_writel(mask, reg + MXS_TOG_ADDR);
72}
73
74#define OCOTP_WORD_OFFSET 0x20
75#define OCOTP_WORD_COUNT 0x20
76
77#define BM_OCOTP_CTRL_BUSY (1 << 8)
78#define BM_OCOTP_CTRL_ERROR (1 << 9)
79#define BM_OCOTP_CTRL_RD_BANK_OPEN (1 << 12)
80
81static DEFINE_MUTEX(ocotp_mutex);
82static u32 ocotp_words[OCOTP_WORD_COUNT];
83
84static const u32 *mxs_get_ocotp(void)
85{
86 struct device_node *np;
87 void __iomem *ocotp_base;
88 int timeout = 0x400;
89 size_t i;
90 static int once;
91
92 if (once)
93 return ocotp_words;
94
95 np = of_find_compatible_node(NULL, NULL, "fsl,ocotp");
96 ocotp_base = of_iomap(np, 0);
97 WARN_ON(!ocotp_base);
98
99 mutex_lock(&ocotp_mutex);
100
101
102
103
104
105
106
107 __mxs_clrl(BM_OCOTP_CTRL_ERROR, ocotp_base);
108
109
110 while ((__raw_readl(ocotp_base) &
111 (BM_OCOTP_CTRL_BUSY | BM_OCOTP_CTRL_ERROR)) && --timeout)
112 cpu_relax();
113
114 if (unlikely(!timeout))
115 goto error_unlock;
116
117
118 __mxs_setl(BM_OCOTP_CTRL_RD_BANK_OPEN, ocotp_base);
119
120
121 udelay(1);
122
123
124 timeout = 0x400;
125 while ((__raw_readl(ocotp_base) & BM_OCOTP_CTRL_BUSY) && --timeout)
126 cpu_relax();
127
128 if (unlikely(!timeout))
129 goto error_unlock;
130
131 for (i = 0; i < OCOTP_WORD_COUNT; i++)
132 ocotp_words[i] = __raw_readl(ocotp_base + OCOTP_WORD_OFFSET +
133 i * 0x10);
134
135
136 __mxs_clrl(BM_OCOTP_CTRL_RD_BANK_OPEN, ocotp_base);
137
138 once = 1;
139
140 mutex_unlock(&ocotp_mutex);
141
142 return ocotp_words;
143
144error_unlock:
145 mutex_unlock(&ocotp_mutex);
146 pr_err("%s: timeout in reading OCOTP\n", __func__);
147 return NULL;
148}
149
150enum mac_oui {
151 OUI_FSL,
152 OUI_DENX,
153 OUI_CRYSTALFONTZ,
154 OUI_I2SE,
155 OUI_ARMADEUS,
156};
157
158static void __init update_fec_mac_prop(enum mac_oui oui)
159{
160 struct device_node *np, *from = NULL;
161 struct property *newmac;
162 const u32 *ocotp = mxs_get_ocotp();
163 u8 *macaddr;
164 u32 val;
165 int i;
166
167 for (i = 0; i < 2; i++) {
168 np = of_find_compatible_node(from, NULL, "fsl,imx28-fec");
169 if (!np)
170 return;
171
172 from = np;
173
174 if (of_get_property(np, "local-mac-address", NULL))
175 continue;
176
177 newmac = kzalloc(sizeof(*newmac) + 6, GFP_KERNEL);
178 if (!newmac)
179 return;
180 newmac->value = newmac + 1;
181 newmac->length = 6;
182
183 newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
184 if (!newmac->name) {
185 kfree(newmac);
186 return;
187 }
188
189
190
191
192
193 macaddr = newmac->value;
194 switch (oui) {
195 case OUI_FSL:
196 macaddr[0] = 0x00;
197 macaddr[1] = 0x04;
198 macaddr[2] = 0x9f;
199 break;
200 case OUI_DENX:
201 macaddr[0] = 0xc0;
202 macaddr[1] = 0xe5;
203 macaddr[2] = 0x4e;
204 break;
205 case OUI_CRYSTALFONTZ:
206 macaddr[0] = 0x58;
207 macaddr[1] = 0xb9;
208 macaddr[2] = 0xe1;
209 break;
210 case OUI_I2SE:
211 macaddr[0] = 0x00;
212 macaddr[1] = 0x01;
213 macaddr[2] = 0x87;
214 break;
215 case OUI_ARMADEUS:
216 macaddr[0] = 0x00;
217 macaddr[1] = 0x1e;
218 macaddr[2] = 0xac;
219 break;
220 }
221 val = ocotp[i];
222 macaddr[3] = (val >> 16) & 0xff;
223 macaddr[4] = (val >> 8) & 0xff;
224 macaddr[5] = (val >> 0) & 0xff;
225
226 of_update_property(np, newmac);
227 }
228}
229
230static inline void enable_clk_enet_out(void)
231{
232 struct clk *clk = clk_get_sys("enet_out", NULL);
233
234 if (!IS_ERR(clk))
235 clk_prepare_enable(clk);
236}
237
238static void __init imx28_evk_init(void)
239{
240 update_fec_mac_prop(OUI_FSL);
241
242 mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
243}
244
245static void __init imx28_apf28_init(void)
246{
247 update_fec_mac_prop(OUI_ARMADEUS);
248}
249
250static int apx4devkit_phy_fixup(struct phy_device *phy)
251{
252 phy->dev_flags |= MICREL_PHY_50MHZ_CLK;
253 return 0;
254}
255
256static void __init apx4devkit_init(void)
257{
258 enable_clk_enet_out();
259
260 if (IS_BUILTIN(CONFIG_PHYLIB))
261 phy_register_fixup_for_uid(PHY_ID_KSZ8051, MICREL_PHY_ID_MASK,
262 apx4devkit_phy_fixup);
263}
264
265static void __init crystalfontz_init(void)
266{
267 update_fec_mac_prop(OUI_CRYSTALFONTZ);
268}
269
270static void __init duckbill_init(void)
271{
272 update_fec_mac_prop(OUI_I2SE);
273}
274
275static void __init m28cu3_init(void)
276{
277 update_fec_mac_prop(OUI_DENX);
278}
279
280static const char __init *mxs_get_soc_id(void)
281{
282 struct device_node *np;
283 void __iomem *digctl_base;
284
285 np = of_find_compatible_node(NULL, NULL, "fsl,imx23-digctl");
286 digctl_base = of_iomap(np, 0);
287 WARN_ON(!digctl_base);
288
289 chipid = readl(digctl_base + HW_DIGCTL_CHIPID);
290 socid = chipid & HW_DIGCTL_CHIPID_MASK;
291
292 iounmap(digctl_base);
293 of_node_put(np);
294
295 switch (socid) {
296 case HW_DIGCTL_CHIPID_MX23:
297 return "i.MX23";
298 case HW_DIGCTL_CHIPID_MX28:
299 return "i.MX28";
300 default:
301 return "Unknown";
302 }
303}
304
305static u32 __init mxs_get_cpu_rev(void)
306{
307 u32 rev = chipid & HW_DIGCTL_REV_MASK;
308
309 switch (socid) {
310 case HW_DIGCTL_CHIPID_MX23:
311 switch (rev) {
312 case 0x0:
313 return MXS_CHIP_REVISION_1_0;
314 case 0x1:
315 return MXS_CHIP_REVISION_1_1;
316 case 0x2:
317 return MXS_CHIP_REVISION_1_2;
318 case 0x3:
319 return MXS_CHIP_REVISION_1_3;
320 case 0x4:
321 return MXS_CHIP_REVISION_1_4;
322 default:
323 return MXS_CHIP_REV_UNKNOWN;
324 }
325 case HW_DIGCTL_CHIPID_MX28:
326 switch (rev) {
327 case 0x0:
328 return MXS_CHIP_REVISION_1_1;
329 case 0x1:
330 return MXS_CHIP_REVISION_1_2;
331 default:
332 return MXS_CHIP_REV_UNKNOWN;
333 }
334 default:
335 return MXS_CHIP_REV_UNKNOWN;
336 }
337}
338
339static const char __init *mxs_get_revision(void)
340{
341 u32 rev = mxs_get_cpu_rev();
342
343 if (rev != MXS_CHIP_REV_UNKNOWN)
344 return kasprintf(GFP_KERNEL, "%d.%d", (rev >> 4) & 0xf,
345 rev & 0xf);
346 else
347 return kasprintf(GFP_KERNEL, "%s", "Unknown");
348}
349
350#define MX23_CLKCTRL_RESET_OFFSET 0x120
351#define MX28_CLKCTRL_RESET_OFFSET 0x1e0
352
353static int __init mxs_restart_init(void)
354{
355 struct device_node *np;
356
357 np = of_find_compatible_node(NULL, NULL, "fsl,clkctrl");
358 reset_addr = of_iomap(np, 0);
359 if (!reset_addr)
360 return -ENODEV;
361
362 if (of_device_is_compatible(np, "fsl,imx23-clkctrl"))
363 reset_addr += MX23_CLKCTRL_RESET_OFFSET;
364 else
365 reset_addr += MX28_CLKCTRL_RESET_OFFSET;
366 of_node_put(np);
367
368 return 0;
369}
370
371static void __init eukrea_mbmx283lc_init(void)
372{
373 mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
374}
375
376static void __init mxs_machine_init(void)
377{
378 struct device_node *root;
379 struct device *parent;
380 struct soc_device *soc_dev;
381 struct soc_device_attribute *soc_dev_attr;
382 int ret;
383
384 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
385 if (!soc_dev_attr)
386 return;
387
388 root = of_find_node_by_path("/");
389 ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
390 if (ret)
391 return;
392
393 soc_dev_attr->family = "Freescale MXS Family";
394 soc_dev_attr->soc_id = mxs_get_soc_id();
395 soc_dev_attr->revision = mxs_get_revision();
396
397 soc_dev = soc_device_register(soc_dev_attr);
398 if (IS_ERR(soc_dev)) {
399 kfree(soc_dev_attr->revision);
400 kfree(soc_dev_attr);
401 return;
402 }
403
404 parent = soc_device_to_device(soc_dev);
405
406 if (of_machine_is_compatible("fsl,imx28-evk"))
407 imx28_evk_init();
408 if (of_machine_is_compatible("armadeus,imx28-apf28"))
409 imx28_apf28_init();
410 else if (of_machine_is_compatible("bluegiga,apx4devkit"))
411 apx4devkit_init();
412 else if (of_machine_is_compatible("crystalfontz,cfa10036"))
413 crystalfontz_init();
414 else if (of_machine_is_compatible("eukrea,mbmx283lc"))
415 eukrea_mbmx283lc_init();
416 else if (of_machine_is_compatible("i2se,duckbill") ||
417 of_machine_is_compatible("i2se,duckbill-2"))
418 duckbill_init();
419 else if (of_machine_is_compatible("msr,m28cu3"))
420 m28cu3_init();
421
422 of_platform_default_populate(NULL, NULL, parent);
423
424 mxs_restart_init();
425}
426
427#define MXS_CLKCTRL_RESET_CHIP (1 << 1)
428
429
430
431
432static void mxs_restart(enum reboot_mode mode, const char *cmd)
433{
434 if (reset_addr) {
435
436 __mxs_setl(MXS_CLKCTRL_RESET_CHIP, reset_addr);
437
438 pr_err("Failed to assert the chip reset\n");
439
440
441 mdelay(50);
442 }
443
444
445 soft_restart(0);
446}
447
448static const char *const mxs_dt_compat[] __initconst = {
449 "fsl,imx28",
450 "fsl,imx23",
451 NULL,
452};
453
454DT_MACHINE_START(MXS, "Freescale MXS (Device Tree)")
455 .handle_irq = icoll_handle_irq,
456 .init_machine = mxs_machine_init,
457 .init_late = mxs_pm_init,
458 .dt_compat = mxs_dt_compat,
459 .restart = mxs_restart,
460MACHINE_END
461
