Merge commit 'kumar/next' into next
[sfrench/cifs-2.6.git] / arch / powerpc / platforms / 85xx / mpc85xx_mds.c
1 /*
2  * Copyright (C) Freescale Semicondutor, Inc. 2006-2010. All rights reserved.
3  *
4  * Author: Andy Fleming <afleming@freescale.com>
5  *
6  * Based on 83xx/mpc8360e_pb.c by:
7  *         Li Yang <LeoLi@freescale.com>
8  *         Yin Olivia <Hong-hua.Yin@freescale.com>
9  *
10  * Description:
11  * MPC85xx MDS board specific routines.
12  *
13  * This program is free software; you can redistribute  it and/or modify it
14  * under  the terms of  the GNU General  Public License as published by the
15  * Free Software Foundation;  either version 2 of the  License, or (at your
16  * option) any later version.
17  */
18
19 #include <linux/stddef.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/errno.h>
23 #include <linux/reboot.h>
24 #include <linux/pci.h>
25 #include <linux/kdev_t.h>
26 #include <linux/major.h>
27 #include <linux/console.h>
28 #include <linux/delay.h>
29 #include <linux/seq_file.h>
30 #include <linux/initrd.h>
31 #include <linux/module.h>
32 #include <linux/fsl_devices.h>
33 #include <linux/of_platform.h>
34 #include <linux/of_device.h>
35 #include <linux/phy.h>
36 #include <linux/memblock.h>
37
38 #include <asm/system.h>
39 #include <asm/atomic.h>
40 #include <asm/time.h>
41 #include <asm/io.h>
42 #include <asm/machdep.h>
43 #include <asm/pci-bridge.h>
44 #include <asm/irq.h>
45 #include <mm/mmu_decl.h>
46 #include <asm/prom.h>
47 #include <asm/udbg.h>
48 #include <sysdev/fsl_soc.h>
49 #include <sysdev/fsl_pci.h>
50 #include <sysdev/simple_gpio.h>
51 #include <asm/qe.h>
52 #include <asm/qe_ic.h>
53 #include <asm/mpic.h>
54 #include <asm/swiotlb.h>
55
56 #undef DEBUG
57 #ifdef DEBUG
58 #define DBG(fmt...) udbg_printf(fmt)
59 #else
60 #define DBG(fmt...)
61 #endif
62
63 #define MV88E1111_SCR   0x10
64 #define MV88E1111_SCR_125CLK    0x0010
65 static int mpc8568_fixup_125_clock(struct phy_device *phydev)
66 {
67         int scr;
68         int err;
69
70         /* Workaround for the 125 CLK Toggle */
71         scr = phy_read(phydev, MV88E1111_SCR);
72
73         if (scr < 0)
74                 return scr;
75
76         err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));
77
78         if (err)
79                 return err;
80
81         err = phy_write(phydev, MII_BMCR, BMCR_RESET);
82
83         if (err)
84                 return err;
85
86         scr = phy_read(phydev, MV88E1111_SCR);
87
88         if (scr < 0)
89                 return scr;
90
91         err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);
92
93         return err;
94 }
95
96 static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
97 {
98         int temp;
99         int err;
100
101         /* Errata */
102         err = phy_write(phydev,29, 0x0006);
103
104         if (err)
105                 return err;
106
107         temp = phy_read(phydev, 30);
108
109         if (temp < 0)
110                 return temp;
111
112         temp = (temp & (~0x8000)) | 0x4000;
113         err = phy_write(phydev,30, temp);
114
115         if (err)
116                 return err;
117
118         err = phy_write(phydev,29, 0x000a);
119
120         if (err)
121                 return err;
122
123         temp = phy_read(phydev, 30);
124
125         if (temp < 0)
126                 return temp;
127
128         temp = phy_read(phydev, 30);
129
130         if (temp < 0)
131                 return temp;
132
133         temp &= ~0x0020;
134
135         err = phy_write(phydev,30,temp);
136
137         if (err)
138                 return err;
139
140         /* Disable automatic MDI/MDIX selection */
141         temp = phy_read(phydev, 16);
142
143         if (temp < 0)
144                 return temp;
145
146         temp &= ~0x0060;
147         err = phy_write(phydev,16,temp);
148
149         return err;
150 }
151
152 /* ************************************************************************
153  *
154  * Setup the architecture
155  *
156  */
157 #ifdef CONFIG_SMP
158 extern void __init mpc85xx_smp_init(void);
159 #endif
160
161 #ifdef CONFIG_QUICC_ENGINE
162 static struct of_device_id mpc85xx_qe_ids[] __initdata = {
163         { .type = "qe", },
164         { .compatible = "fsl,qe", },
165         { },
166 };
167
168 static void __init mpc85xx_publish_qe_devices(void)
169 {
170         struct device_node *np;
171
172         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
173         if (!of_device_is_available(np)) {
174                 of_node_put(np);
175                 return;
176         }
177
178         of_platform_bus_probe(NULL, mpc85xx_qe_ids, NULL);
179 }
180
181 static void __init mpc85xx_mds_reset_ucc_phys(void)
182 {
183         struct device_node *np;
184         static u8 __iomem *bcsr_regs;
185
186         /* Map BCSR area */
187         np = of_find_node_by_name(NULL, "bcsr");
188         if (!np)
189                 return;
190
191         bcsr_regs = of_iomap(np, 0);
192         of_node_put(np);
193         if (!bcsr_regs)
194                 return;
195
196         if (machine_is(mpc8568_mds)) {
197 #define BCSR_UCC1_GETH_EN       (0x1 << 7)
198 #define BCSR_UCC2_GETH_EN       (0x1 << 7)
199 #define BCSR_UCC1_MODE_MSK      (0x3 << 4)
200 #define BCSR_UCC2_MODE_MSK      (0x3 << 0)
201
202                 /* Turn off UCC1 & UCC2 */
203                 clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
204                 clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
205
206                 /* Mode is RGMII, all bits clear */
207                 clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
208                                          BCSR_UCC2_MODE_MSK);
209
210                 /* Turn UCC1 & UCC2 on */
211                 setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
212                 setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
213         } else if (machine_is(mpc8569_mds)) {
214 #define BCSR7_UCC12_GETHnRST    (0x1 << 2)
215 #define BCSR8_UEM_MARVELL_RST   (0x1 << 1)
216 #define BCSR_UCC_RGMII          (0x1 << 6)
217 #define BCSR_UCC_RTBI           (0x1 << 5)
218                 /*
219                  * U-Boot mangles interrupt polarity for Marvell PHYs,
220                  * so reset built-in and UEM Marvell PHYs, this puts
221                  * the PHYs into their normal state.
222                  */
223                 clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
224                 setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
225
226                 setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
227                 clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
228
229                 for (np = NULL; (np = of_find_compatible_node(np,
230                                                 "network",
231                                                 "ucc_geth")) != NULL;) {
232                         const unsigned int *prop;
233                         int ucc_num;
234
235                         prop = of_get_property(np, "cell-index", NULL);
236                         if (prop == NULL)
237                                 continue;
238
239                         ucc_num = *prop - 1;
240
241                         prop = of_get_property(np, "phy-connection-type", NULL);
242                         if (prop == NULL)
243                                 continue;
244
245                         if (strcmp("rtbi", (const char *)prop) == 0)
246                                 clrsetbits_8(&bcsr_regs[7 + ucc_num],
247                                         BCSR_UCC_RGMII, BCSR_UCC_RTBI);
248                 }
249         } else if (machine_is(p1021_mds)) {
250 #define BCSR11_ENET_MICRST     (0x1 << 5)
251                 /* Reset Micrel PHY */
252                 clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
253                 setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
254         }
255
256         iounmap(bcsr_regs);
257 }
258
259 static void __init mpc85xx_mds_qe_init(void)
260 {
261         struct device_node *np;
262
263         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
264         if (!np) {
265                 np = of_find_node_by_name(NULL, "qe");
266                 if (!np)
267                         return;
268         }
269
270         if (!of_device_is_available(np)) {
271                 of_node_put(np);
272                 return;
273         }
274
275         qe_reset();
276         of_node_put(np);
277
278         np = of_find_node_by_name(NULL, "par_io");
279         if (np) {
280                 struct device_node *ucc;
281
282                 par_io_init(np);
283                 of_node_put(np);
284
285                 for_each_node_by_name(ucc, "ucc")
286                         par_io_of_config(ucc);
287         }
288
289         mpc85xx_mds_reset_ucc_phys();
290
291         if (machine_is(p1021_mds)) {
292 #define MPC85xx_PMUXCR_OFFSET           0x60
293 #define MPC85xx_PMUXCR_QE0              0x00008000
294 #define MPC85xx_PMUXCR_QE3              0x00001000
295 #define MPC85xx_PMUXCR_QE9              0x00000040
296 #define MPC85xx_PMUXCR_QE12             0x00000008
297                 static __be32 __iomem *pmuxcr;
298
299                 np = of_find_node_by_name(NULL, "global-utilities");
300
301                 if (np) {
302                         pmuxcr = of_iomap(np, 0) + MPC85xx_PMUXCR_OFFSET;
303
304                         if (!pmuxcr)
305                                 printk(KERN_EMERG "Error: Alternate function"
306                                         " signal multiplex control register not"
307                                         " mapped!\n");
308                         else
309                         /* P1021 has pins muxed for QE and other functions. To
310                          * enable QE UEC mode, we need to set bit QE0 for UCC1
311                          * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
312                          * and QE12 for QE MII management singals in PMUXCR
313                          * register.
314                          */
315                                 setbits32(pmuxcr, MPC85xx_PMUXCR_QE0 |
316                                                   MPC85xx_PMUXCR_QE3 |
317                                                   MPC85xx_PMUXCR_QE9 |
318                                                   MPC85xx_PMUXCR_QE12);
319
320                         of_node_put(np);
321                 }
322
323         }
324 }
325
326 static void __init mpc85xx_mds_qeic_init(void)
327 {
328         struct device_node *np;
329
330         np = of_find_compatible_node(NULL, NULL, "fsl,qe");
331         if (!of_device_is_available(np)) {
332                 of_node_put(np);
333                 return;
334         }
335
336         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
337         if (!np) {
338                 np = of_find_node_by_type(NULL, "qeic");
339                 if (!np)
340                         return;
341         }
342
343         if (machine_is(p1021_mds))
344                 qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
345                                 qe_ic_cascade_high_mpic);
346         else
347                 qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
348         of_node_put(np);
349 }
350 #else
351 static void __init mpc85xx_publish_qe_devices(void) { }
352 static void __init mpc85xx_mds_qe_init(void) { }
353 static void __init mpc85xx_mds_qeic_init(void) { }
354 #endif  /* CONFIG_QUICC_ENGINE */
355
356 static void __init mpc85xx_mds_setup_arch(void)
357 {
358 #ifdef CONFIG_PCI
359         struct pci_controller *hose;
360 #endif
361         dma_addr_t max = 0xffffffff;
362
363         if (ppc_md.progress)
364                 ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
365
366 #ifdef CONFIG_PCI
367         for_each_node_by_type(np, "pci") {
368                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
369                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
370                         struct resource rsrc;
371                         of_address_to_resource(np, 0, &rsrc);
372                         if ((rsrc.start & 0xfffff) == 0x8000)
373                                 fsl_add_bridge(np, 1);
374                         else
375                                 fsl_add_bridge(np, 0);
376
377                         hose = pci_find_hose_for_OF_device(np);
378                         max = min(max, hose->dma_window_base_cur +
379                                         hose->dma_window_size);
380                 }
381         }
382 #endif
383
384 #ifdef CONFIG_SMP
385         mpc85xx_smp_init();
386 #endif
387
388         mpc85xx_mds_qe_init();
389
390 #ifdef CONFIG_SWIOTLB
391         if (memblock_end_of_DRAM() > max) {
392                 ppc_swiotlb_enable = 1;
393                 set_pci_dma_ops(&swiotlb_dma_ops);
394                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
395         }
396 #endif
397 }
398
399
400 static int __init board_fixups(void)
401 {
402         char phy_id[20];
403         char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
404         struct device_node *mdio;
405         struct resource res;
406         int i;
407
408         for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
409                 mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);
410
411                 of_address_to_resource(mdio, 0, &res);
412                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
413                         (unsigned long long)res.start, 1);
414
415                 phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
416                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
417
418                 /* Register a workaround for errata */
419                 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
420                         (unsigned long long)res.start, 7);
421                 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
422
423                 of_node_put(mdio);
424         }
425
426         return 0;
427 }
428 machine_arch_initcall(mpc8568_mds, board_fixups);
429 machine_arch_initcall(mpc8569_mds, board_fixups);
430
431 static struct of_device_id mpc85xx_ids[] = {
432         { .type = "soc", },
433         { .compatible = "soc", },
434         { .compatible = "simple-bus", },
435         { .compatible = "gianfar", },
436         { .compatible = "fsl,rapidio-delta", },
437         { .compatible = "fsl,mpc8548-guts", },
438         { .compatible = "gpio-leds", },
439         {},
440 };
441
442 static struct of_device_id p1021_ids[] = {
443         { .type = "soc", },
444         { .compatible = "soc", },
445         { .compatible = "simple-bus", },
446         { .compatible = "gianfar", },
447         {},
448 };
449
450 static int __init mpc85xx_publish_devices(void)
451 {
452         if (machine_is(mpc8568_mds))
453                 simple_gpiochip_init("fsl,mpc8568mds-bcsr-gpio");
454         if (machine_is(mpc8569_mds))
455                 simple_gpiochip_init("fsl,mpc8569mds-bcsr-gpio");
456
457         of_platform_bus_probe(NULL, mpc85xx_ids, NULL);
458         mpc85xx_publish_qe_devices();
459
460         return 0;
461 }
462
463 static int __init p1021_publish_devices(void)
464 {
465         of_platform_bus_probe(NULL, p1021_ids, NULL);
466         mpc85xx_publish_qe_devices();
467
468         return 0;
469 }
470
471 machine_device_initcall(mpc8568_mds, mpc85xx_publish_devices);
472 machine_device_initcall(mpc8569_mds, mpc85xx_publish_devices);
473 machine_device_initcall(p1021_mds, p1021_publish_devices);
474
475 machine_arch_initcall(mpc8568_mds, swiotlb_setup_bus_notifier);
476 machine_arch_initcall(mpc8569_mds, swiotlb_setup_bus_notifier);
477 machine_arch_initcall(p1021_mds, swiotlb_setup_bus_notifier);
478
479 static void __init mpc85xx_mds_pic_init(void)
480 {
481         struct mpic *mpic;
482         struct resource r;
483         struct device_node *np = NULL;
484
485         np = of_find_node_by_type(NULL, "open-pic");
486         if (!np)
487                 return;
488
489         if (of_address_to_resource(np, 0, &r)) {
490                 printk(KERN_ERR "Failed to map mpic register space\n");
491                 of_node_put(np);
492                 return;
493         }
494
495         mpic = mpic_alloc(np, r.start,
496                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
497                         MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU,
498                         0, 256, " OpenPIC  ");
499         BUG_ON(mpic == NULL);
500         of_node_put(np);
501
502         mpic_init(mpic);
503         mpc85xx_mds_qeic_init();
504 }
505
506 static int __init mpc85xx_mds_probe(void)
507 {
508         unsigned long root = of_get_flat_dt_root();
509
510         return of_flat_dt_is_compatible(root, "MPC85xxMDS");
511 }
512
513 define_machine(mpc8568_mds) {
514         .name           = "MPC8568 MDS",
515         .probe          = mpc85xx_mds_probe,
516         .setup_arch     = mpc85xx_mds_setup_arch,
517         .init_IRQ       = mpc85xx_mds_pic_init,
518         .get_irq        = mpic_get_irq,
519         .restart        = fsl_rstcr_restart,
520         .calibrate_decr = generic_calibrate_decr,
521         .progress       = udbg_progress,
522 #ifdef CONFIG_PCI
523         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
524 #endif
525 };
526
527 static int __init mpc8569_mds_probe(void)
528 {
529         unsigned long root = of_get_flat_dt_root();
530
531         return of_flat_dt_is_compatible(root, "fsl,MPC8569EMDS");
532 }
533
534 define_machine(mpc8569_mds) {
535         .name           = "MPC8569 MDS",
536         .probe          = mpc8569_mds_probe,
537         .setup_arch     = mpc85xx_mds_setup_arch,
538         .init_IRQ       = mpc85xx_mds_pic_init,
539         .get_irq        = mpic_get_irq,
540         .restart        = fsl_rstcr_restart,
541         .calibrate_decr = generic_calibrate_decr,
542         .progress       = udbg_progress,
543 #ifdef CONFIG_PCI
544         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
545 #endif
546 };
547
548 static int __init p1021_mds_probe(void)
549 {
550         unsigned long root = of_get_flat_dt_root();
551
552         return of_flat_dt_is_compatible(root, "fsl,P1021MDS");
553
554 }
555
556 define_machine(p1021_mds) {
557         .name           = "P1021 MDS",
558         .probe          = p1021_mds_probe,
559         .setup_arch     = mpc85xx_mds_setup_arch,
560         .init_IRQ       = mpc85xx_mds_pic_init,
561         .get_irq        = mpic_get_irq,
562         .restart        = fsl_rstcr_restart,
563         .calibrate_decr = generic_calibrate_decr,
564         .progress       = udbg_progress,
565 #ifdef CONFIG_PCI
566         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
567 #endif
568 };
569