1 /*
2  * Broadcom specific AMBA
3  * ChipCommon Power Management Unit driver
4  *
5  * Copyright 2009, Michael Buesch <m@bues.ch>
6  * Copyright 2007, Broadcom Corporation
7  *
8  * Licensed under the GNU/GPL. See COPYING for details.
9  */
10 
11 #include "bcma_private.h"
12 #include <linux/bcma/bcma.h>
13 
14 static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
15 					u32 offset, u32 mask, u32 set)
16 {
17 	u32 value;
18 
19 	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
20 	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
21 	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
22 	value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
23 	value &= mask;
24 	value |= set;
25 	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value);
26 	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
27 }
28 
29 static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
30 {
31 	struct bcma_bus *bus = cc->core->bus;
32 
33 	switch (bus->chipinfo.id) {
34 	case 0x4313:
35 	case 0x4331:
36 	case 43224:
37 	case 43225:
38 		break;
39 	default:
40 		pr_err("PLL init unknown for device 0x%04X\n",
41 			bus->chipinfo.id);
42 	}
43 }
44 
45 static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
46 {
47 	struct bcma_bus *bus = cc->core->bus;
48 	u32 min_msk = 0, max_msk = 0;
49 
50 	switch (bus->chipinfo.id) {
51 	case 0x4313:
52 		min_msk = 0x200D;
53 		max_msk = 0xFFFF;
54 		break;
55 	case 43224:
56 	case 43225:
57 		break;
58 	default:
59 		pr_err("PMU resource config unknown for device 0x%04X\n",
60 			bus->chipinfo.id);
61 	}
62 
63 	/* Set the resource masks. */
64 	if (min_msk)
65 		bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
66 	if (max_msk)
67 		bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
68 }
69 
70 void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
71 {
72 	struct bcma_bus *bus = cc->core->bus;
73 
74 	switch (bus->chipinfo.id) {
75 	case 0x4313:
76 	case 0x4331:
77 	case 43224:
78 	case 43225:
79 		break;
80 	default:
81 		pr_err("PMU switch/regulators init unknown for device "
82 			"0x%04X\n", bus->chipinfo.id);
83 	}
84 }
85 
86 void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
87 {
88 	struct bcma_bus *bus = cc->core->bus;
89 
90 	switch (bus->chipinfo.id) {
91 	case 0x4313:
92 		bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
93 		break;
94 	case 0x4331:
95 		pr_err("Enabling Ext PA lines not implemented\n");
96 		break;
97 	case 43224:
98 		if (bus->chipinfo.rev == 0) {
99 			pr_err("Workarounds for 43224 rev 0 not fully "
100 				"implemented\n");
101 			bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x00F000F0);
102 		} else {
103 			bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
104 		}
105 		break;
106 	case 43225:
107 		break;
108 	default:
109 		pr_err("Workarounds unknown for device 0x%04X\n",
110 			bus->chipinfo.id);
111 	}
112 }
113 
114 void bcma_pmu_init(struct bcma_drv_cc *cc)
115 {
116 	u32 pmucap;
117 
118 	pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
119 	cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);
120 
121 	pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
122 		 pmucap);
123 
124 	if (cc->pmu.rev == 1)
125 		bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
126 			      ~BCMA_CC_PMU_CTL_NOILPONW);
127 	else
128 		bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
129 			     BCMA_CC_PMU_CTL_NOILPONW);
130 
131 	if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
132 		pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");
133 
134 	bcma_pmu_pll_init(cc);
135 	bcma_pmu_resources_init(cc);
136 	bcma_pmu_swreg_init(cc);
137 	bcma_pmu_workarounds(cc);
138 }
139