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25#ifdef CONFIG_PPC64
26
27#include <asm/prom.h>
28
29#define atmel_getb(chip, offset) readb(chip->vendor->iobase + offset);
30#define atmel_putb(val, chip, offset) writeb(val, chip->vendor->iobase + offset)
31#define atmel_request_region request_mem_region
32#define atmel_release_region release_mem_region
33
34static inline void atmel_put_base_addr(void __iomem *iobase)
35{
36 iounmap(iobase);
37}
38
39static void __iomem * atmel_get_base_addr(unsigned long *base, int *region_size)
40{
41 struct device_node *dn;
42 unsigned long address, size;
43 const unsigned int *reg;
44 int reglen;
45 int naddrc;
46 int nsizec;
47
48 dn = of_find_node_by_name(NULL, "tpm");
49
50 if (!dn)
51 return NULL;
52
53 if (!of_device_is_compatible(dn, "AT97SC3201")) {
54 of_node_put(dn);
55 return NULL;
56 }
57
58 reg = of_get_property(dn, "reg", ®len);
59 naddrc = of_n_addr_cells(dn);
60 nsizec = of_n_size_cells(dn);
61
62 of_node_put(dn);
63
64
65 if (naddrc == 2)
66 address = ((unsigned long) reg[0] << 32) | reg[1];
67 else
68 address = reg[0];
69
70 if (nsizec == 2)
71 size =
72 ((unsigned long) reg[naddrc] << 32) | reg[naddrc + 1];
73 else
74 size = reg[naddrc];
75
76 *base = address;
77 *region_size = size;
78 return ioremap(*base, *region_size);
79}
80#else
81#define atmel_getb(chip, offset) inb(chip->vendor->base + offset)
82#define atmel_putb(val, chip, offset) outb(val, chip->vendor->base + offset)
83#define atmel_request_region request_region
84#define atmel_release_region release_region
85
86enum tpm_atmel_addr {
87 TPM_ATMEL_BASE_ADDR_LO = 0x08,
88 TPM_ATMEL_BASE_ADDR_HI = 0x09
89};
90
91
92static int atmel_verify_tpm11(void)
93{
94
95
96 if (tpm_read_index(TPM_ADDR, 4) != 'A' ||
97 tpm_read_index(TPM_ADDR, 5) != 'T' ||
98 tpm_read_index(TPM_ADDR, 6) != 'M' ||
99 tpm_read_index(TPM_ADDR, 7) != 'L')
100 return 1;
101
102
103 if (tpm_read_index(TPM_ADDR, 0x00) != 1 ||
104 tpm_read_index(TPM_ADDR, 0x01) != 1)
105 return 1;
106
107
108 return 0;
109}
110
111static inline void atmel_put_base_addr(void __iomem *iobase)
112{
113}
114
115
116static void __iomem * atmel_get_base_addr(unsigned long *base, int *region_size)
117{
118 int lo, hi;
119
120 if (atmel_verify_tpm11() != 0)
121 return NULL;
122
123 lo = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_LO);
124 hi = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_HI);
125
126 *base = (hi << 8) | lo;
127 *region_size = 2;
128
129 return ioport_map(*base, *region_size);
130}
131#endif
132